CN204306642U - A kind of pressure limiting valve with pressure display - Google Patents

Abstract

The utility model provides a pressure limiting valve with pressure display, which belongs to the field of mechanical technology. The utility model solves the problem of inconvenient disassembly and assembly of the existing pressure regulating display combination mechanism of the pressure vessel. The pressure limiting valve with pressure display is set on the handle of the pressure cooker, including the valve seat and the pressure display cap connected to the center of the valve seat. The center of the valve seat is connected with a knob that can rotate relative to the valve seat, and the knob is located between the valve seat and Between the pressure display cap, between the knob and the valve seat, there is a pressure limiting rod that can adjust the pressure of the pressure cooker. There is a control mechanism that can make the clamping plate protrude or retract from the notch when the knob is turned. The pressure limiting valve with pressure display has the advantage of convenient assembly and disassembly.

Description

A pressure limiting valve with pressure display

technical field

The utility model belongs to the technical field of machinery and relates to a pressure limiting valve, in particular to a pressure limiting valve with pressure display.

Background technique

The pressure of the household pressure vessel of the prior art is generally not adjustable, and is set by the manufacturer according to the national standard. At present, there are also daily-use pressure vessels with adjustable pressure and display functions on the market, but the pressure adjustment and display structures are complicated, and they are not compatible with daily small pressure vessels such as family life and steam pressure disinfection tanks.

For this situation, people have been aware of this deficiency and have made improvements, such as a pressure regulation and display combination mechanism for pressure vessels proposed in Chinese patent literature [application number: 200520117141.8; authorization announcement number: CN2861667 Y], Contains a valve body fixed on the pressure vessel, the valve body is equipped with an adjustment knob connected to the pressure limiting device and a pressure display device, a valve stem is installed in the valve body, and a valve core that can adjust the pressure is set on the valve stem , the pressure limiting spring is mounted on the valve core, and the lifting plate connected with the adjustment knob is installed on the pressure limiting spring. The inner wall of the adjustment knob is provided with a spiral guide groove, and the end of the lifting plate is placed in the spiral guide groove. The inner wall of the adjustment knob and the outer cylindrical surface corresponding to the valve body are provided with a circlip groove, and a circlip is built in the circlip groove, and a pressure indicating spring is installed on the valve stem, and the pressure indicating spring is placed Between the valve stem and the top of the lower cavity of the adjusting knob, a pressure indicating window is arranged on the adjusting knob, and the valve stem passes through the top of the lower cavity of the adjusting knob.

The above-mentioned combined mechanism realizes the pressure limiting function through the cooperation of the valve core and the side hole of the valve body, and at the same time realizes the pressure display function by using the lifting and lowering of the valve stem. But in actual use, this combined mechanism is all fixed on the pot by fasteners such as screws or nuts, which brings the problem of inconvenient disassembly and installation.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned problems in the prior art, and propose a pressure-limiting valve with pressure display which is easy to assemble and disassemble.

The purpose of this utility model can be achieved through the following technical solutions: a pressure limiting valve with pressure display, which is set on the handle of the pressure cooker, includes a valve seat and a pressure display cap connected to the center of the valve seat, and is characterized in that the A knob that can rotate relative to the valve seat is connected to the center of the valve seat, and the knob is located between the valve seat and the pressure display cap, and a pressure limiting rod that can adjust the pressure of the pressure cooker is provided between the knob and the valve seat. There are gaps on both sides of the valve seat, and an arc-shaped clamping plate is provided at the gap, and a control mechanism that enables the clamping plate to extend or retract from the gap when the knob is rotated is provided between the valve seat and the knob .

The pressure-limiting valve is installed on the handle connected with the pot cover for use, and the inner wall of the handle is provided with a card slot matched with the card plate.

When working normally, the clip is stuck in the slot so that the pressure limiting valve can be stably connected with the handle; when the pressure limiting valve needs to be disassembled, turn the knob to make the pressure limiting rod in the disassembled state, and at this time, the clip is in the Under the action of the control mechanism, the card slot is fully extended, so that the pressure limiting valve can be easily taken out from the handle; when the pressure limiting valve needs to be installed, reverse the knob to retract the card plate to the card In the groove, the pressure limiting valve is stably connected with the handle, which has the advantage of convenient installation.

In the above-mentioned pressure limiting valve with pressure display, the control mechanism includes a guide groove arranged on the surface of the clamping plate and a guide post arranged at the bottom of the knob, the described guide groove includes a straight groove section one, and the described guide groove The column is located in the first straight section of the guide groove, and when the guide column moves along the first straight section of the guide groove, the clamping plate protrudes or retracts into the notch.

When the knob rotates in the circumferential direction relative to the valve seat, the outer wall of the guide post can always be in contact with the inner wall of the straight groove section 1 and stably drive the clip to extend or retract into the slot on the handle, so that the pressure limiting valve The disassembly or installation process from the handle is relatively smooth, thereby improving the convenience of disassembly and installation of the pressure limiting valve.

In the above-mentioned pressure limiting valve with pressure display, the bottom of the clamping plate has a U-shaped clamping block, and the edge of the bottom of the valve seat has two adjacent bayonet slots corresponding to the notches and two adjacent ones. An engaging portion is formed between the bayonet sockets, the engaging portion passes through the inner side of the bayonet block, and the two sides of the bayonet block respectively snap into the two bayonet sockets and can move axially along the bayonet sockets.

By setting the engaging part passing through the inner side of the block and the two sides of the block respectively snapping into the bayonet, it plays a guiding role in the movement of the block so that the block can be smoothly extended or retracted into the gap, further improving the limit The convenience of removing or installing the pressure valve from the handle.

In the above-mentioned pressure limiting valve with pressure display, there is a limit block at the bottom of the engaging part near its edge, and the stop block abuts against the limit block, and the limit block is close to the edge of the engaging part One side has a sloped guide surface.

The inclined guide surface is used to facilitate the installation of the clamping block; when the assembly is completed, the clamping block and the limiting block are offset to prevent the clamping block from falling off from the limiting block, so that the valve seat and the clamping block form an integral body, which can further improve the limit The convenience of removing or installing the pressure valve from the handle.

In the above-mentioned pressure limiting valve with pressure display, as another technical solution, there is a positioning column near the gap in the valve seat, and one end of the clamping plate is hinged on the positioning column, and the control mechanism includes The torsion spring sleeved on the positioning post and the guide post set at the bottom of the knob, the two ends of the torsion spring are respectively connected to the clamping plate and the valve seat, and the clamping plate has a direction around the hinge point under the elastic force of the torsion spring. The inner side of the notch has a tendency to rotate, and the guide post abuts against the inner side of the clamping plate.

When the pressure limiting valve needs to be disassembled from the handle, turn the knob to keep the guide column away from the clamping plate. At this time, the clamping plate will rotate around the hinge point to the inside of the gap under the action of the torsion spring so that the clamping plate protrudes out of the slot, which is convenient for the pressure limiting valve. On the contrary, when the pressure limiting valve needs to be installed, turn the knob to make the guide column and the inner side of the clamping plate and make the clamping plate overcome the torsion spring to rotate to the outside of the notch and then snap into the card slot, which is convenient for the installation of the pressure limiting valve.

In the above-mentioned pressure limiting valve with pressure display, the valve seat has a concave positioning cavity, and the center of the bottom of the positioning cavity has a raised sleeve part, and the knob is sleeved on the sleeve part. The lower end of the knob has an embedding part embedded in the positioning cavity, the two sides of the embedding part of the knob have buckles, the inner side of the positioning cavity corresponds to a slot, and the buckle is snapped to the inner side wall of the positioning cavity at the bottom of the slot superior.

The knob is sleeved on the sleeve part and the buckle is snapped on the inner side wall of the positioning cavity, so that the knob is stably connected to the valve seat in the axial direction, so that the knob and the valve seat are integrated, which facilitates the installation of the pressure limiting valve. Disassembly and installation; at the same time, the above design is adopted to reduce the shaking when the knob is turned, so that the pressure limiting rod and the guide post can work stably, thus further improving the convenience of disassembling or installing the pressure limiting valve from the handle .

In the above-mentioned pressure limiting valve with pressure display, the upper end of the knob has a concave cavity, the pressure display cap is located in the concave cavity, and the inner side of the pressure display cap has a mounting column, and the mounting column penetrates into the sleeve part , the end of the installation column is connected with a push rod, the center of the bottom of the valve seat is connected with a sealing sleeve 1, and the lower end of the push rod abuts against the inner side of the sealing sleeve 1.

During normal use, the sealing sleeve 1 is plugged into the display valve hole on the pot cover, and the pressure in the pot acts on the sealing sleeve 1, so that the sealing sleeve 1, the ejector rod and the pressure display cap move upward, and the user can observe the pressure. The rising height of the display cap is used to judge the pressure in the pot; the ejector rod, the pressure display cap and the valve seat are connected as a whole through the sealing sleeve, which improves the convenience of dismounting or installing the pressure limiting valve from the handle.

In the above-mentioned pressure limiting valve with pressure display, the bottom of the concave cavity has a raised assembly block, one end of the assembly block is inclined downward, and the assembly block has an arc opened from one end of the assembly block to the other end. The bottom of the valve seat has a mounting part, the pressure limiting rod is set in the mounting part and its upper end passes through the arc-shaped limiting groove, the upper end of the pressure limiting rod has a shoulder, and the shoulder is against the arc. The bottom of the mounting part is connected to the second sealing sleeve, and the lower end of the pressure limiting rod is connected to the second sealing sleeve.

When working, the sealing sleeve 2 is inserted into the pressure valve hole on the pot cover. When the knob is turned, the arc-shaped limiting groove rotates with the knob, so that the pressure limiting rod gradually rises or falls, and then drives the sealing sleeve 2 to disengage. The pressure valve hole or inserted in the pressure valve hole realizes the function of closing or exhausting; the valve seat and the pressure limiting rod are connected as a whole through the sealing sleeve 2, which improves the pressure limiting valve from the handle. convenience.

In the above-mentioned pressure limiting valve with pressure display, the arc-shaped limiting groove is sequentially provided with a concave sealing positioning part, an exhaust positioning part and a disassembly positioning part from the downwardly inclined end of the assembly block. The above-mentioned sealing positioning part is located at one end of the assembly block which is inclined downward, and the shoulder at the upper end of the pressure limiting rod can fall into the sealing positioning part, the exhaust positioning part and the disassembly positioning part in turn during the rotation process.

When the pressure limiting rod is located at the sealing positioning part, the sealing sleeve 2 is plugged into the pressure valve hole, so that the pot lid is sealed to achieve the effect of closing the gas; when the pressure limiting rod is transferred from the sealing positioning part to the exhaust positioning part, The pressure limiting rod will gradually rise and drive the sealing sleeve 2 to rise and start to leave the pressure valve hole. When the pressure limiting rod is located at the exhaust positioning part, the sealing sleeve 2 will be separated from the pot cover to open the pressure valve hole, so that the gas in the pot can pass through the pressure valve. At this time, the guide post slides into the straight groove section 1 of the guide groove; when the pressure limiting rod slides from the exhaust positioning part to the disassembly positioning part, the outer wall of the guide post can always be in line with the straight The inner side wall of slot section 1 is close to each other and stably drives the clamping plate to extend or retract into the slot on the handle, so that the process of disassembling or installing the pressure limiting valve from the handle is relatively smooth. When the pressure limiting rod is located in the dismounting positioning part , the card board is completely disengaged from the card slot.

In the above-mentioned pressure limiting valve with pressure display, the guide groove also includes an arc-shaped groove section communicating with the straight groove section. When the knob drives the pressure limiting rod to rotate from the sealing state to the exhaust state, the The guide post moves along the arc groove section of the guide groove, and when the knob drives the pressure limiting rod to rotate from the exhaust state to the disassembly state, the guide post turns from the arc groove section of the guide groove to the straight groove within segment one and move along it.

By setting the arc-shaped groove section, the guide post can slide into the straight groove section 1 smoothly and gently, thereby further improving the convenience of disassembling and installing the pressure limiting valve.

In the above-mentioned pressure limiting valve with pressure display, the bottom of the concave cavity is provided with an arc-shaped anti-opening groove, and the inner side of the pressure display cap has a columnar protruding connecting column, and the end of the connecting column is connected with The anti-opening rod, the anti-opening rod is located in the arc-shaped anti-opening groove, and the arc-shaped anti-opening groove includes a disassembly-preventing section with a larger groove width and a disassembly section with a smaller groove width, the lower end of the anti-opening rod The outer diameter is larger than the groove width of the dismounting section, and the groove width of the dismounting section is larger than the outer diameter of the middle part of the anti-opening rod.

When there is pressure in the pot body, the pressure display cap rises to drive the anti-opening rod to rise so that the lower end of the anti-opening rod is located in the anti-disassembly section. Since the outer diameter of the lower end of the anti-opening rod is larger than the groove width of the disassembly section, when there is pressure in the pot , the pressure limiting lever can only be switched back and forth between the sealing state and the exhaust state, so as to avoid disassembling the display valve when there is pressure in the pot, ensuring the safety of the user.

Compared with the prior art, the pressure limiting valve with pressure display has the following advantages:

1. By turning the knob to control the extension or retraction of the block into the gap, it is more convenient to disassemble or install the pressure limiting valve from the handle.

2. By setting the straight groove section 1, during the rotation of the knob, the outer wall of the guide column can always be in contact with the inner wall of the straight groove section 1 and stably drive the card plate to extend or retract to the card on the handle. In the groove, the process of removing or installing the pressure limiting valve from the handle is relatively smooth, thereby improving the convenience of disassembling and installing the pressure limiting valve.

3. By setting the anti-opening rod and the arc-shaped anti-opening groove and with the cooperation of the two, when there is still pressure in the pot body, the pressure limiting rod can only switch back and forth between the sealing state and the exhausting state. Therefore, it is avoided that the display valve is disassembled when there is pressure in the pot, and the safety of the user is ensured.

Description of drawings

Fig. 1 is a structural schematic diagram of the connection between the pressure limiting valve and the handle;

Fig. 2 is a schematic diagram of the A-A sectional structure of Fig. 1;

Fig. 3 is the structural representation of this pressure limiting valve;

Fig. 4 is the B-B sectional structural schematic diagram of Fig. 3;

Fig. 5 is a schematic diagram of the explosion structure of the pressure limiting valve;

Fig. 6 is the structural representation of knob;

Fig. 7 is a schematic diagram of the position of the guide post in the assembled state;

Fig. 8 is a structural schematic diagram of a pressure limiting valve in a sealed state;

Fig. 9 is a schematic diagram of the position of the guide post in the sealed state;

Fig. 10 is a structural representation of the pressure limiting valve when there is air pressure in the pot body;

Fig. 11 is a structural schematic diagram of the pressure limiting valve in the exhaust state;

Figure 12 is a schematic diagram of the position of the guide post in the exhaust state;

Fig. 13 is a schematic diagram of the position of the guide post in the disassembled state;

Figure 14 is a schematic diagram of the position of the anti-opening lever in the disassembled state.

In the figure, 1, valve seat; 1a, positioning cavity; 1b, socket part; 1c, installation part; 1d, notch; 2, pressure display cap; 2a, installation post; 2b, connecting post; 3, knob; Connecting part; 3b, embedded part; 3c, buckle; 3d, concave cavity; 3e, assembly block; 3e1, arc-shaped limiting groove; 3e2, sealing positioning part; 3e3, exhaust positioning part; 3f, positioning block; 3f1, positioning hole one; 3f2, straight groove section two; 3g, arc-shaped slot stop; 3g1, stop dismantling section; 3g2, disassembly section; 3h, guide post; 3i, gear indicating block; 4 , pressure limiting rod; 4a, support foot; 4b, shoulder; 5, clamping plate; 5a, guide groove; 5a1, arc groove section; , engaging part; 5e, limit block; 5e1, guide surface; 6, stop rod; 7, sealing sleeve 1; 8, ejector rod; 11. Spring 2; 12. Pot cover; 13. Handle.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

Embodiment one

As shown in Figures 2 to 7, the pressure limiting valve with pressure display is composed of a valve seat 1, a pressure display cap 2, a knob 3, a pressure limiting rod 4, a clamping plate 5, a stop rod 6 and the like.

Wherein, as shown in FIG. 4 and FIG. 5 , the valve seat 1 is cylindrical, and the top of the valve seat 1 has a downwardly concave positioning cavity 1a, and the center of the bottom of the positioning cavity 1a has a protruding sleeve portion 1b. The middle part of the knob 3 has a protruding and cylindrical connecting portion 3a, and the connecting portion 3a is sheathed on the sleeve portion 1b.

As shown in Figure 4 and Figure 7, the lower end surface of the knob 3 has a protruding embedded part 3b, the two sides of the embedded part 3b have buckles 3c and in this embodiment, the two buckles 3c are symmetrical along the center of the embedded part 3b set up. The inner side of the positioning cavity 1a is correspondingly provided with a slot, and when the embedded part 3b is inserted into the positioning cavity 1a, the two buckles 3c are snapped respectively on the inner side wall of the positioning cavity 1a at the bottom of the slot, so that the knob 3 and the valve The seat 1 achieves stable axial positioning. When the knob 3 rotates around the centerline of the sleeve portion 1b, the two buckles 3c will rotate circumferentially along the inner wall of the positioning cavity 1a.

As shown in Fig. 4 and Fig. 8, the upper end of the knob 3 has a cavity 3d, and the above-mentioned pressure display cap 2 is located in the cavity 3d. Wherein, the inner side of the pressure display cap 2 has a tubular mounting post 2a and the mounting post 2a penetrates into the sleeve portion 1b. A sealing sleeve 7 is connected to the center of the bottom of the valve seat 1, and a push rod 8 and a spring 9 are arranged between the sealing sleeve 7 and the mounting column 2a. Wherein, the upper end of the ejector rod 8 is plugged into the installation column 2a. There is an annular retaining edge 8a on the outer edge of the upper end of the push rod 8, and the annular retaining edge 8a abuts against the end face of the mounting column 2a, and the lower end face of the ejector rod 8 abuts against the sealing sleeve one 7. The spring one 9 is sheathed on the mounting column 2a, and the two ends of the spring one 9 respectively abut against the annular stopper 8a and the top wall of the socket part 1a, so that the push rod 8 has a tendency to move downward. In this embodiment, there are several display blocks of different colors on the outer edge of the pressure display cap 2 and the display blocks are distributed along the height of the pressure display cap 2, so that the range of pressure in the pot is reflected by the display blocks of different colors. Naturally, it is also possible to have some display rings of different colors on the outer edge of the pressure display cap 2 to reflect the pressure range in the pot.

As shown in FIG. 8 , the bottom of the valve seat 1 has a mounting portion 1 c and the bottom of the mounting portion 1 c is connected with a sealing sleeve 2 10 . The above-mentioned pressure limiting rod 4 is located in the installation portion 1 c and the lower end of the pressure limiting rod 4 is against the inner wall of the sealing sleeve 2 10 . Specifically, there is a supporting foot 4a on the outer edge of the lower end of the pressure limiting rod 4 and the supporting foot 4a abuts against the inner wall of the sealing sleeve 2 10 . The installation part 1c is also provided with a spring 2 11, the spring 2 11 is sleeved on the pressure limiting rod 4, and the two ends of the spring 11 are respectively against the top wall of the installation part 1c and the supporting foot 4a, so that the pressure limiting rod 4 has a downward movement trend.

As shown in FIG. 6 , the bottom of the cavity 3 d has a protruding assembly block 3 e and the end of the assembly block 3 e close to the pressure limiting rod 4 is inclined downward. The assembly block 3e has an arc-shaped limiting groove 3e1 opened from one end of the assembly block 3e to the other end, and the arc-shaped limiting groove 3e1 is sequentially provided with concave sealing positioning parts 3e2, The exhaust positioning part 3e3, the dismounting positioning part 3e4, and the sealing positioning part 3e2 are located on the downwardly inclined end of the arc-shaped limiting groove 3e1. The upper end of the pressure-limiting rod 4 passes through the arc-shaped limiting groove 3e1, and the upper end of the pressure-limiting rod 4 has a shoulder 4b, and the shoulder 4b abuts against the arc-shaped limiting groove 3e1. When the knob 3 is rotating, the shoulder 4b on the upper end of the pressure limiting rod 4 can fall into the sealing positioning part 3e2, the exhaust positioning part 3e3 and the disassembly positioning part 3e4 in sequence.

As shown in FIG. 3 , a positioning block 3f is provided at the bottom of the cavity 3d close to the assembly block 3e and the height of the positioning block 3f is greater than the minimum height of the assembly block 3e. The positioning block 3f has a positioning groove opened from one end of the positioning block 3f to the other end, and the positioning groove communicates with the arc-shaped limiting groove 3e1. The positioning groove includes a straight groove segment 3f2, a positioning hole 1 3f1 axially penetrating, and a positioning hole 2 axially penetrating. The first positioning hole 3f1 communicates with the second positioning hole through the second straight groove section 3f2, and the second positioning hole is located between the first positioning hole 3f1 and the arc-shaped limiting groove 3e1. Wherein, the aperture of positioning hole one 3f1 and the aperture of positioning hole two are greater than the outer diameter of retaining shoulder 4b; The shoulder 4b can slide into the sealing positioning portion 3e2 from the positioning hole 3f1, but in normal use, the shoulder 4b cannot retreat into the positioning hole 3f1.

As shown in FIG. 6 and FIG. 8 , an arc-shaped anti-opening groove 3g is provided at the bottom of the cavity 3d, and the sleeve portion 1a is located between the arc-shaped anti-opening groove 3g and the positioning block 3f. The inner side of the pressure display cap 2 has a columnar protruding connecting column 2b, and a cylindrical anti-opening rod 6 is provided in the arc-shaped anti-opening groove 3g, and the upper end of the anti-opening rod 6 is inserted into the connecting column 2b. Specifically, the arc-shaped anti-opening groove 3g includes a larger anti-disassembly section 3g1 with a groove width and a smaller disassembly section 3g2 with a smaller groove width. Wider than the outer diameter of the opening rod 6 middle part.

As shown in FIG. 4 and FIG. 5 , notches 1 d are formed on both sides of the valve seat 1 , and in this embodiment, the two notches 1 d are arranged symmetrically along the center of the valve seat 1 . Each notch 1d is provided with an arc-shaped clamping plate 5, and a control mechanism is provided between the valve seat 1 and the knob 3 to enable the clamping plate 5 to protrude or retract from the notch 1d when the knob 3 is rotated.

In this embodiment, as shown in FIG. 4 , the control mechanism includes a guide groove 5 a provided on the surface of the clamping plate 5 and a guide column 3 h provided at the bottom of the knob 3 . Wherein, the guide groove 5a includes an arc-shaped groove segment 5a1 and a straight groove segment 5a2 which communicate with each other, and the arc of the arc-shaped groove segment 5a1 is the same as that of the arc-shaped limiting groove 3e1. When the knob 3 drives the pressure limiting rod 4 to rotate from the sealing positioning part 3e2 to the exhaust positioning part 3e3, the guide column 3h moves along the arc-shaped groove segment 5a1 of the guide groove 5a; when the knob 3 drives the pressure limiting rod 4 to move from the exhaust positioning part When the part 3e3 is turned to disassemble the positioning part 3e4, the guide post 3h turns from the arc-shaped groove section 5a1 of the guide groove 5a into the straight groove section-5a2 and moves along it so that the clamping plate 5 is retracted from the notch 1d.

For further optimization, as shown in Figure 3 and Figure 5, the bottom of the clamping plate 5 has a U-shaped clamping block 5b, and the edge of the bottom of the valve seat 1 corresponding to the notch 1d has two adjacent bayonet notches 5c and two adjacent clamping holes 5c An engaging portion 5d is formed between the openings 5c, and the engaging portion 5d passes through the inner side of the locking block 5b. As shown in Figure 5, there is a limit block 5e at the bottom of the engaging portion 5d close to its edge, the block 5b abuts against the limit block 5e, and the side of the limit block 5e near the edge of the engaging portion 5d has an inclined guide surface 5e1, to facilitate the installation of the block 5b. Both sides of the clamping block 5b are snapped into the two bayonet slots 5c respectively, and under the action of the knob 3, the clamping block 5b can move axially along the bayonet slots 5c.

As shown in FIG. 1 , FIG. 3 and FIG. 8 , a gear indicator block 3i is also connected to the outer wall of the knob 3 . In actual use, the handle 13 is marked with exhaust gear icons, sealing gear icons and dismantling gear icons, and the required function can be realized by rotating the knob 3 so that the gear indicating block 3i is opposite to the icons on the handle 13.

As shown in Fig. 1 and Fig. 2, the pressure limiting valve of this band pressure display is contained on the handle 13 that links to each other with pot cover 12 when in use and sealing sleeve one 7 and sealing sleeve two 10 all link to each other with pot cover 12. Wherein, the inner side of the handle 13 is provided with a card slot matched with the clamping plate 5 , and the clamping plate 5 can realize the connection between the pressure limiting valve and the handle 13 by being clamped into or out of the card slot. The pot cover 12 is provided with a pressure valve hole and a display valve hole. When in normal use, the sealing sleeve 17 is inserted into the display valve hole and seals the display valve hole; the sealing sleeve 2 10 is inserted into the pressure valve hole and presses the valve Hole sealed.

When the pressure limiting valve is assembled, as shown in Figure 6 and Figure 7, the shoulder 4b on the pressure limiting rod 4 enters the inner cavity of the knob 3 through the positioning hole 3f1, then the pressure limiting rod 4 is pulled up and the knob 3 is turned The pressure-limiting rod 4 slides through the second straight groove section 3f2 and the shoulder 4b falls into the sealing positioning part 3e2. At this time, the shoulder 4b abuts against the arc-shaped limiting groove 3e1. Because the external diameter of retaining shoulder 4b will be greater than the groove width of straight groove section two 3f2, make in normal use time limit pressure bar 4 without sending back in positioning hole one 3f1. Then, the pressure limiting valve is connected to the handle 13 by snapping the clamping plate 5 into the card slot, and then the sealing sleeve one 7 is inserted into the display valve hole and the display valve hole is sealed under the action of the spring one 9; the sealing sleeve two 10 Insert it into the pressure valve hole and seal the pressure valve hole under the action of spring 211.

In normal use (that is, in a sealed state), as shown in Figure 8, Figure 9 and Figure 10, the pressure generated in the pot acts on the sealing sleeve 7, so that the ejector rod 8 overcomes the elastic force of the spring 9 and moves upward to drive the pressure display. Cap 2 moves up, judges the range of pressure in the pot body by observing the color of the display block on the pressure display cap 2 outer wall, and now, the lower end of the opening rod 6 is positioned in the section 3g1 of only opening.

When the pressure in the pot body is too high and needs to be exhausted (that is, enter the exhaust state), as shown in Figure 11 and Figure 12, turn the knob 3 to make the pressure limiting rod 4 slide from the sealing positioning part 3e2 to the exhaust positioning part 3e3, and this , the guide post 3h slides in the arc groove section 5a1; the middle part of the anti-opening rod 6 slides in the anti-disassembly section 3g1. When the pressure limiting rod 4 slides towards the exhaust positioning part 3e3, the shoulder 4b overcomes the elastic force of the spring 211 and gradually rises and drives the sealing sleeve 10 to rise; when the shoulder 4b is located in the exhaust positioning part 3e3, the sealing sleeve 2 10 is separated from the pressure valve hole so that the gas in the pot is discharged through the pressure valve hole, and at this time, the lower end of the stop rod 6 is against the edge of the disassembly section 3g2, and the guide post 3h is located at the junction of the arc groove section 5a1 and the straight groove section 5a2 place.

When there was pressure in the pot body, the lower end of the stop bar 6 was located in the stop section 3g1, and because the outer diameter of the stop bar 6 lower end was greater than the groove width of the disassembly section 3g2, the stop bar 6 could not be rotated into the disassembly section 3g2, thereby When there is pressure in the pot body, the shoulder 4b cannot continue to rotate toward the dismounting positioning part 3e4, so that the pressure limiting valve cannot be disassembled, which improves the safety of use.

When there is no pressure in the pot body and the pressure limiting valve needs to be disassembled (i.e. enters the disassembled state), as shown in Figure 13 and Figure 14, at this time the pressure display cap 2 resets and drives the anti-opening rod 6 to move down to make the anti-opening rod 6 The middle part is located in the section 3g1 for preventing dismantling. Turn the knob 3 to move the blocking shoulder 4b to the dismounting positioning part 3e4. At this time, the guide post 3h will turn into the straight groove section-5a2, and the middle part of the stop lever 6 will rotate to the dismounting section 3g2. During the sliding process of the pressure limiting rod 4 toward the dismounting positioning part 3e4, the outer sidewall of the guide post 3h can always be in contact with the inner sidewall of the straight groove section 15a2 and stabilized under the action of the engaging part 5d and the locking block 5b The clamping plate 5 is driven to break away from the draw-in slot on the handle 13. When the knob 3 cannot be rotated, the clamping plate 5 is completely disengaged from the draw-in slot, and now the pressure-limiting valve is easily taken out.

Embodiment two

The structure and principle of this second embodiment are basically the same as that of the first embodiment. The difference is that there is a positioning column in the valve seat 1 close to the gap 1d, and one end of the clamping plate 5 is hinged on the positioning column. The torsion spring on the column and the guide column 3h arranged at the bottom of the knob 3, the two ends of the torsion spring are respectively connected to the clamping plate 5 and the valve seat 1, and under the elastic force of the torsion spring, the clamping plate 5 has a gap 1d around the hinge point. In the tendency of inner rotation, the guide post 3h abuts against the inner side of the clamping plate 5 . When the pressure limiting valve needs to be disassembled from the handle 13, turn the knob 3 to keep the guide post 3h and the clamp 5 away from the clamp 5. At this time, the clamp 5 will rotate around the hinge point to the inside of the gap 1d under the action of the torsion spring to make the clamp 5 5 extends out of the card slot to facilitate the disassembly of the pressure limiting valve; on the contrary, when the pressure limiting valve needs to be installed, turn the knob 3 to make the guide column 3h contact the inner side of the clamping plate 5 and make the clamping plate 5 rotate to the outside of the notch 1d against the torsion force of the torsion spring to lock into the card slot to facilitate the installation of the pressure limiting valve.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Claims (10)

1. the pressure limiting valve with pressure display, be arranged on the handle (13) of pressure cooker, comprise valve seat (1) and be connected to pressure display cap (2) of valve seat (1) center, it is characterized in that, described valve seat (1) center is connected with the knob (3) that can rotate relative to valve seat (1) and knob (3) is positioned at valve seat (1) and pressure shows between cap (2), be provided with between described knob (3) and valve seat (1) and pressure controlled pressure limiting bar (4) can be carried out to pressure cooker, described valve seat (1) both sides offer breach (1d), described breach (1d) place is provided with curved clamp (5), the controlling organization that clamp (5) can be made to stretch out from breach (1d) place or retract when knob (3) rotates is provided with between described valve seat (1) and knob (3).

2. the pressure limiting valve of band pressure display according to claim 1, it is characterized in that, described controlling organization comprises the guide groove (5a) being arranged at clamp (5) surface and the guide pillar (3h) being arranged at knob (3) bottom, described guide groove (5a) comprises a straight trough section one (5a2), described guide pillar (3h) is positioned at the straight trough section one (5a2) of guide groove (5a), and the clamp (5) described in when guide pillar (3h) moves along the straight trough section one (5a2) of guide groove (5a) stretches out or in retraction breach (1d).

3. the pressure limiting valve of band pressure display according to claim 1 and 2, it is characterized in that, described clamp (5) bottom has the fixture block (5b) taken the shape of the letter U, corresponding breach (1d) place, edge of described valve seat (1) bottom has two adjacent bayonet sockets (5c) and forms holding section (5d) between adjacent two bayonet sockets (5c), described holding section (5d) is through the inner side of fixture block (5b), and the both sides of described fixture block (5b) snap in respectively in two bayonet sockets (5c) and also can move axially along bayonet socket (5c).

4. the pressure limiting valve of band pressure display according to claim 3, it is characterized in that, described bottom, holding section (5d) has limited block (5e) near its edge, described fixture block (5b) and limited block (5e) lean, and described limited block (5e) has the spigot surface (5e1) of inclination near the side at holding section (5d) edge.

5. the pressure limiting valve of band pressure display according to claim 1, it is characterized in that, described valve seat (1) has recessed positioning chamber (1a), place of described positioning chamber (1a) bottom centre has protruding socket part (1b), knob (3) is socketed on socket part (1b), described knob (3) lower end has the Embedded Division (3b) in embedding positioning chamber (1a), Embedded Division (3b) both sides of described knob (3) have buckle (3c), described positioning chamber (1a) inner side correspondence has short slot, described buckle (3c) is connected on the madial wall of the positioning chamber (1a) bottom short slot.

6. the pressure limiting valve of band pressure display according to claim 5, it is characterized in that, described knob (3) upper end has cavity (3d), described pressure display cap (2) is positioned at cavity (3d), described pressure display cap (2) inner side has erection column (2a), described erection column (2a) penetrates in socket part (1b), described erection column (2a) end is connected with push rod (8), the center of described valve seat (1) bottom is connected with sealing shroud one (7), described push rod (8) lower end and sealing shroud one (7) inner side lean.

7. the pressure limiting valve of band pressure display according to claim 6, it is characterized in that, described cavity (3d) bottom has protruding assembling block (3e), described assembling block (3e) one end is downward-sloping, described assembling block (3e) has self-assembly block (3e) one end and offer arc-shaped limit groove (3e1) to the other end, described valve seat (1) bottom has installation portion (1c), described pressure limiting bar (4) is located in installation portion (1c) and its upper end through arc-shaped limit groove (3e1), described pressure limiting bar (4) upper end has shoulder block (4b), shoulder block (4b) is resisted against on arc-shaped limit groove (3e1), described installation portion (1c) bottom is connected with sealing shroud two (10), described pressure limiting bar (4) lower end is connected with sealing shroud two (10).

8. the pressure limiting valve of band pressure display according to claim 7, it is characterized in that, described arc-shaped limit groove (3e1) one end that above self-assembly block (3e) is downward-sloping is risen and is disposed with recessed sealing location division (3e2), exhaust location division (3e3) and dismounting location division (3e4), described sealing location division (3e2) is positioned at the downward-sloping one end of assembling block (3e), the shoulder block (4b) of described pressure limiting bar (4) upper end can fall into sealing location division (3e2) successively in rotation process, be vented in location division (3e3) and dismounting location division (3e4).

9. the pressure limiting valve of band pressure display according to claim 2, it is characterized in that, described guide groove (5a) also comprises an arcwall groove (5a1) communicated with straight trough section one (5a2), when knob (3) drives pressure limiting bar (4) to turn to exhaust condition from sealing state, described guide pillar (3h) moves along the arcwall groove (5a1) of guide groove (5a), and when knob (3) drives pressure limiting bar (4) to turn to disassembly status from exhaust condition, described guide pillar (3h) to proceed to straight trough section one (5a2) and moves along it in the arcwall groove (5a1) of guide groove (5a).

10. the pressure limiting valve of band pressure display according to claim 6, it is characterized in that, described cavity (3d) bottom offers arc only fluting (3g), described pressure display cap (2) inner side has the joint pin (2b) protruded in column, described joint pin (2b) end is connected with only opening lever (6), described only opening lever (6) is positioned at arc only fluting (3g), described arc only fluting (3g) comprises the larger only section of tearing open (3g1) of groove width and the less dismounting section (3g2) of groove width, described only opening lever (6) lower end external diameter is greater than the groove width of dismounting section (3g2), the groove width of described dismounting section (3g2) is greater than the external diameter at only opening lever (6) middle part.