KR20010077806A - Ball valve - Google Patents

Abstract

The manufacturing cost can be reduced, the assembly of the ball into the valve body can be easily and quickly performed, and the pressure in the pipe can be reduced even if abnormal boosting occurs in the valve body. .

A valve body 2 having an opening 11 at the top, a ball 3 having a through hole 14 for adjusting the flow rate, a primary valve seat retainer assembly 4 having plate springs 19 and 20 having an inclined surface 25, and a secondary valve It consists of the seat retainer assembly 5, the lid 6, the operation means 7 for operating the ball 3, and the back seat 27 having the inclined surface 29, and the primary valve seat retainer assembly 4 and the ball 3 from the opening 11, and the secondary side. When the valve seat retainer assembly 5 is mounted in the valve body 2, the inclined surface 25 is mounted by sliding the inclined surface 29 of the back seat 27 provided in the valve body 2.

Description

Ball Valve {Ball Valve}

The present invention is a ball for controlling the flow rate by installing in a pipe that transfers and controls various fluids in various chemical plants, water treatment plants, nuclear power plants, and other plants and facilities. It relates to a ball valve.

In general, a ball valve includes a ball having a through hole in the valve body, operates the ball by an operation lever from the outside, and controls the opening and closing degree of the ball through hole with respect to the fluid passage of the valve body. This is to control the flow rate.

In addition, as a conventional ball valve as shown in FIG. 9, for example, the inner end face 103 of the primary side fluid passage 102 of the valve body 101 and the inner end face (not shown) of the secondary side fluid passage 104 are as follows. It is formed at an angle. By making each inner end face 103 obliquely, the opening area of the opening part 105 in the center of a valve main body can become a larger area compared with the ball valve so far.

Therefore, with this ball valve, the ball 107 together with the valve seat retainer assembly 106 and the secondary valve seat retainer assembly (not shown) can be smoothly inserted into the valve body 101 from the opening 105. I can attach it.

In addition, when the primary valve seat retainer assembly 106, the secondary valve seat retainer assembly (not shown), and the ball 107 are removed from the valve body 101, and the inside of the valve body 101 is inspected and cleaned, a wide opening 105 is provided. Since it is formed, inspection and cleaning work can be performed easily.

Although a ball valve having such many advantages, in order to form a wide opening 105, the inner end face 103 of the primary side fluid passage 102 and the inner end face (not shown) of the secondary side fluid passage 104 must be formed at an angle.

Therefore, when the primary valve seat retainer assembly 106 and the secondary valve seat retainer assembly (not shown) are mounted in the valve body 101 from the opening 105 together with the ball 107, the primary valve seat retainer assembly 106 and the secondary side are The valve seat retainer assembly (not shown) abuts on each inner end face 103 so as to be mounted in an inclined inverted shape. Therefore, both end faces 110 (not shown) of the ball 107 are brought into contact with the oblique primary valve seat retainer assembly 106 and the secondary valve seat retainer assembly. 110 degrees had to be formed obliquely.

Therefore, in manufacturing the ball valve, there is a problem that the manufacturing cost increases due to the effort and effort in the inclined processing of the ball 107, the inner end surface of the primary side fluid passage 102 and the secondary side fluid passage 104.

The present invention was developed in view of the above, and its object is to reduce manufacturing costs, to facilitate the assembly of the ball into the valve body easily and quickly, and further to increase the abnormal pressure in the valve body. To provide a ball valve that can reduce the pressure in the pipe even if iii) occurs.

1 is a cross-sectional view of a ball valve of the present invention.

2 is an explanatory diagram of a main part of the operation means.

3 is an exploded cross-sectional view of the primary valve seat retainer assembly.

4 is an exploded cross-sectional view of the secondary valve seat retainer assembly.

5 is an exploded cross-sectional view showing the main part of the ball valve of the present invention.

6 is a perspective view of the valve body viewed from the opening.

7 is a perspective view of a manual ball valve that is an example of the present invention.

8 is a perspective view of an automatic ball valve that is an example of the present invention.

9 is a partial sectional view of a conventional ball valve.

Major sign:

1. ball valve 2. valve body

3. Ball

4. Primary valve seat retainer assembly

5. Secondary valve seat retainer assembly

6. Lid 7. Control means

8. Primary side fluid path 8a. End face of the primary fluid passage

9. Secondary fluid passage 9a. End face of the secondary fluid passage

10. Fluid passage 11. Opening

14. Through hole of ball 15. End face of ball

16. End face of the ball

18. Primary side valve seat retainer 19. Countersunk spring

20. Saucer Spring 21.Ring

22. Primary ball seat

25. Inclined surface of the primary valve seat retainer assembly (primary valve seat retainer)

27. back seat 29. slope of back seat

30. End face of the primary fluid path side of the backsheet

In order to effectively achieve the above object, the present invention has the following configuration. That is, the ball valve according to the present invention as set forth in claim 1 has a valve body having an opening at a position orthogonal to a fluid passage having a primary fluid passage and a secondary fluid passage, and the valve body having a through hole. Ball valves mounted in the fluid passages of the valves to adjust the flow rate; primary valve seat retainer assemblies and secondary valve seat retainer assemblies disposed on both ends of the through-holes of the balls and mounted in the fluid passages of the valve body; A ball valve comprising a lid detachably attached to an opening of the valve body and an operation means provided on the lid to operate the ball, wherein the primary side fluid passage is opposed to the primary valve seat retainer assembly. The end face of the secondary side fluid passage facing the secondary side valve seat retainer assembly parallel to the fluid passage in parallel. In addition, both end faces of the balls, which are both ends of the through hole, are formed in parallel, and the end face facing the primary fluid passage of the primary valve seat retainer assembly is moved downward to an inclined surface inclined to the ball side. Further, between the primary valve seat retainer assembly and the primary fluid passage, an inclined surface communicating with the fluid passage and abutting the inclined surface of the primary valve seat retainer assembly is formed on one side. The back seat is formed so that the other side is abutted in parallel with the end face of the primary side fluid passage.

In the ball valve according to the present invention described in claim 2, in the configuration of the ball valve according to claim 1, the primary valve seat retainer assembly includes a primary valve seat retainer, a disc spring, a ring, and the ball. And an end face of the primary side valve seat retainer is an inclined surface in contact with the inclined surface of the back seat.

Example

An embodiment of the present invention will be described with reference to FIGS.

1 is a cross-sectional view of the ball valve of the present invention, FIG. 2 is an explanatory view of the main part of the operation means, and FIG. 3 is a cross-sectional view of the primary valve seat retainer assembly disassembled. 4 is an exploded cross-sectional view of the secondary valve seat retainer assembly, FIG. 5 is an exploded cross-sectional view showing a main part of the ball valve of the present invention, FIG. 6 is a perspective view of the valve body viewed from the opening, and FIG. It is a perspective view of the manual ball valve which is an example of this, and FIG. 8 is a perspective view of the automatic ball valve of an example of this invention.

As shown in Figs. 1 to 7, reference numeral 1 denotes a manual ball valve which is an example according to the present invention, and includes a valve body 2, a ball 3, a primary side valve seat retainer assembly 4 and a secondary side valve seat retainer assembly. 5, the lid 6, the operating means 7, the bolt 12 for fixing the lid 6 to the valve body 2, and a back seat (27).

More specifically, the valve body 2 (refer to FIGS. 1 and 5) has a primary side fluid passage 8 which abuts the upstream side passage of the fluid flowing into the valve body 2 and a secondary side fluid passage 9 which abuts the downstream side passage. And a fluid passage 10 having a cylindrical shape, and an opening 11 formed in one direction orthogonal to the fluid passage 10 between the primary side fluid passage 8 and the secondary side fluid passage 9.

The opposing end face 8a of the primary side fluid passage 8 and the end face 9a of the secondary side fluid passage 9 are formed to be perpendicular to the fluid passage 10. Moreover, the upper part of the opening part 11 of the valve main body 2 is formed in the shape of a rib, and the lid 6 can be detachably engaged with this yaw part 11a. Moreover, several screw holes 13 (refer FIG. 6) are formed in the circumference | surroundings of the opening part 11 of the valve main body 2 so that the lid 6 can be fixed to the valve main body 2 by the bolt 12 (or the screw).

The ball 3 (refer FIG. 1, FIG. 5, FIG. 6) is formed by processing the sphere of the size which can be inserted in the valve main body 2 from the opening part 11. As shown in FIG. That is, the ball 3 has a through hole 14 having the same diameter as the primary side fluid passage 8 and the secondary side fluid passage 9 in the center. Both end faces 15 and 16 of the ball 3 located at both ends of the through hole 14 are formed to be parallel to each other. Furthermore, the stem groove 17 for engaging the tip part 41a of the stem 41 of the operation means 7 mentioned later is formed in the outer peripheral surface of the ball 3.

The primary side valve seat retainer assembly 4 (see FIGS. 1 and 3) is composed of a primary side valve seat retainer 18, a plate spring 19, 20, a ring 21, and a primary side ball seat 22 in contact with the ball 3.

The primary valve seat retainer 18 has a circular recess 23 which can accommodate two disc springs 19 and 20, a ring 21 and a primary ball seat 22, and also has a primary fluid passage 8 and 2 It has a through hole 24 having the same shape as the vehicle side fluid passage 9. The inner diameter of the concave portion 23 is formed to a diameter larger than the diameter of the through hole 24.

Furthermore, the end face 18a side of the primary valve seat retainer 18, which faces the end face 8a of the primary side fluid passage 8 with the back seat 27 fitted, moves toward the inner bottom 2a direction of the valve body 2. And an inclined surface 25 formed to be inclined at the three sides of the ball inserted into the valve body 2 (see FIG. 5).

In the yaw portion 23 of the primary valve seat retainer 18, two plate springs 19, 20, a ring 21, and a primary ball seat 22 are assembled.

The two plate springs 19 and 20 are symmetrically arranged as shown in the drawing, and are assembled to the recess 23 of the primary valve seat retainer 18.

The ring 21 has a hole 21a of the same diameter as the through hole 24. In addition, the primary side ball seat 22 is formed in a mortar form on one side thereof, and abuts the end face 15 of the ball 3 (see Fig. 5) so that the ball 3 can be supported. A hole 26 having the same inner diameter as 24 is formed.

A back seat 27 is provided between the primary valve seat retainer assembly 4 and the primary fluid passage 8 (see FIGS. 1 and 5). The back seat 27 has a hole 28 having the same diameter as that of the primary side fluid passage 8, and has a side in contact with the inclined surface 25 of the primary valve seat retainer 18 as the inclined surface 29, and the stage that contacts the primary side fluid passage 8 side. The face 30 is vertically formed. The inclined surface 29 is formed to be inclined from the upper side to the lower side when the back seat 27 is installed in the valve body 2.

The inclined surface 29 of the back seat 27 and the inclined surface 25 of the primary valve seat retainer 18 contact each other so that the primary valve seat retainer assembly 4 does not incline with respect to the inner bottom 2a of the valve body 2 at right angles. It is mounted in two.

Next, the secondary side valve seat retainer assembly 5 (refer to FIG. 4, FIG. 1, FIG. 5) is provided between the secondary side fluid passage 9 of the valve body 2, and the ball 3, and is a seat retainer. ) 31 and the secondary ball seat 32.

The seat retainer 31 has a diameter 33 larger than that of the secondary side fluid passage 9, and has a hole 33 having a diameter almost the same as the outer diameter of the secondary side ball seat 32, and has a secondary side ball seat at the inner peripheral part of one side. A step 34 is formed so that the 32 can be stored. The diameter of the step 34 is larger than the hole 33.

The secondary side ball seat 32 has a hole 35 having the same diameter as that of the secondary side fluid passage 9, and forms one side in a mortar shape so that the ball 3 can be engaged and supported.

The lid 6 (refer FIG. 1, FIG. 2, FIG. 6, FIG. 7) is a shape which can be detachably attached to the recessed part 11a of the valve main body 2, and the operation means mounting part which provided the through-hole 36b in the center. It has 36 and the hole 37 for inserting the bolt 12 around the operation means mounting part 36 is formed. An engaging portion 36a is formed inside the operating means mounting portion 36 near the inner surface of the lid 6. As shown in FIG. In addition, on the upper outer periphery of the operation means mounting portion 36, a plurality of gage pieces 36c are formed at predetermined intervals.

The operation means 7 (see FIGS. 1, 2, 6, and 7) installed on the operation means mounting portion 36 of the lid 6 includes a handle 38, a nut 39, a spring washer 40, a stem 41, and a packing presser (gland). It consists of a screw 42, a top adapter 43, several V-type packings 44, a bottom adapter 45, and an O-type ring 46.

When the operating means 7 is assembled into the lid 6, the stem 41 is inserted into the operating means mounting portion 36 from the inner side of the lid 6, and the locking portion 47 formed on the outer periphery of the lower portion of the stem 41 is attached to the locking portion 36a of the lid 6. Keep it.

With respect to the stem 41 inserted into the operating means mounting portion 36, the bottom adapter 45, several V-shaped packings 44 and the top adapter 43 are inserted into the stem 41 from the surface side of the lid 6, and the packing presser 42 is inserted into the operating means mounting portion 36. The upper opening 48 of is sealed by this packing presser 42.

Moreover, the handle 38, the spring washer 40, and the nut 39 are provided in the upper part of this stem 41 in order. The stem 41 can only be turned by the desired angle by loosening the nut 39 and rotating the handle 38. The tip portion 41a of the stem 41 is formed to be able to engage the stem groove 17 of the ball 3.

In the ball valve 1 according to the present invention having the above-described configuration, when assembling (see FIG. 5), a back seat 27 is first attached to the end face 8a of the primary fluid passage 8 of the valve body 2. . In this case, the inclined surface 29 side of the back seat 27 is made into the opposite side to the said end surface 8a, and is mounted so that the thickness side of the back seat 27 may become the inner bottom part 2a side of the valve main body 2. As shown in FIG.

Next, the plate-shaped springs 19, 20, the ring 21, and the primary ball seat 22 are sequentially assembled into the primary valve seat retainer 18 to form the primary valve seat retainer assembly 4. On the other hand, the secondary ball seat 32 is woven into the seat retainer 31 to form the secondary valve seat retainer assembly 5.

The primary side ball seat 22 of the primary side valve seat retainer assembly 4 abuts on one end face 15 of the ball 3, and the secondary side of the secondary side valve seat retainer assembly 5 on the other end face 16 of the ball 3. The ball seat 32 abuts and forms an inner assembly 49 consisting of the primary valve seat retainer assembly 4 and the ball 3 and secondary valve seat retainer 5.

Next, the stem groove 17 of the ball 3 of the inner assembly 49 is turned upward, and both sides of the inner assembly 49 are cut off, and the plate-shaped springs 19 and 20 of the assembly of the primary side valve seat retainer 4 are bent and the primary valve seat retainer is bent. With the assembly 4 leaning against the ball 3 side, the inner assembly 49 is mounted in the valve body 2 from the opening 11 of the valve body 2.

In this case, the inclined surface 25 of the primary side valve seat retainer assembly 4 of the inner assembly 49 abuts against the inclined surface 29 of the back seat 27 mounted in the valve body 2, and easily slides the inner assembly 49 into the valve body 2. I can attach it.

Next, the tip 41a of the stem 41 attached to the lid 6 is positioned so as to engage the stem groove 17 of the ball 3 of the inner assembly 49, and the lid 6 is attached to the recess 11a of the valve body 2. Engage.

Next, the bolt 12 is inserted into each hole 37 of the lid 6 and tightened to the screw hole 13 of the valve body 2 to assemble the ball valve 1 of the present invention.

The ball valve 1 is used by connecting respective pipes to the primary fluid passage 8 and the secondary fluid passage 9 of the valve body 2. By operating the handle 38, the ball 3 turns, and the opening and closing degree of the through hole 14 of the ball 3 with respect to the fluid passage 10 of the valve body 2 changes. By doing in this way, the flow volume which penetrates the ball valve 1 can be adjusted to desired flow volume.

The ball valve 1 of the present invention is not limited to the manual type, but may be capable of automatically operating the above-described ball 3 by fluid pressure such as air as shown in FIG. 8.

As described above, in the ball valve of the present invention, during assembly, the primary valve seat retainer assembly is slid along the inclined surface of the back seat, so that the primary valve seat retainer assembly and the secondary valve seat retainer assembly are separated. The ball held in the seat can be easily mounted in the valve body.

In addition, the ball valve of the present invention, by providing a back seat having an inclined surface in the valve body, thereby forming both end surfaces of the ball and the inner side end surfaces of the primary side fluid passage and the secondary side fluid passage in the valve body as in the prior art. By eliminating the need, the processing can be made easier and the manufacturing cost can be reduced as compared with the conventional ball valve. Furthermore, since the openings are formed wide, the parts can be replaced and the inspection and cleaning in the valve body can be easily performed.

Further, by allowing the ball to be sandwiched between the primary valve seat retainer assembly and the secondary valve seat retainer assembly, the dish-shaped spring woven into the primary valve seat retainer assembly can be bent. By narrowing the width of the secondary valve seat retainer assembly, the ball, and the secondary valve seat retainer assembly, these can be inserted into the valve body from the opening portion, and the mounting can be carried out more smoothly.

Furthermore, even if abnormal boosting occurs in the valve body, the pressure in the pipe can be reduced without adversely affecting each part, the lid, and the operation means in the valve body by the bending action of the disc spring.

Claims (2)

A valve body having an opening at a position orthogonal to the fluid passage having the primary side fluid passage and the secondary side fluid passage, and a through hole to be mounted in the fluid passage of the valve body to regulate the flow rate. And a valve seat retainer assembly and a secondary valve seat retainer assembly disposed at both end sides of the through hole of the ball and mounted in the fluid passage of the valve body, and the valve body. A ball valve comprising a lid detachably attached to an opening of a ball and operating means provided on the lid to operate the ball. An end face of the primary fluid passage facing the primary valve seat retainer assembly and an end face of the secondary fluid passage facing the secondary valve seat retainer assembly are formed to be orthogonal to the fluid passage in parallel; Both end faces of the balls, which are both ends of the through hole, are formed in parallel, and the end face facing the primary fluid passage of the primary valve seat retainer assembly is inclined downward toward the ball side, Further, an inclined surface communicating with the fluid passage between the primary valve seat retainer assembly and the primary fluid passage and contacting the inclined surface of the primary valve seat retainer assembly is formed on one side and the other side. A ball valve, characterized in that a back seat is formed so as to contact the surface in parallel with the end face of the primary fluid passage. The primary valve seat retainer according to claim 1, wherein the primary valve seat retainer assembly includes a primary valve seat retainer, a disc spring, a ring, and a primary ball seat in contact with the ball. The end face of the ball valve, characterized in that the inclined surface in contact with the inclined surface of the back seat (back seat).