CN2535633Y - Gas safety flow controller with fire protection - Google Patents

Abstract

The utility model discloses a gaseous safe flow controller with fire prevention effect includes: a housing having a gas flow passage therein, the flow passage having an inlet at one end thereof for connection to a gas supply source and an outlet at the other end thereof for connection to a gas device; a leakage-stopping piece, a leakage-stopping ring and a ball are respectively arranged in the flow passage along the direction from the air outlet to the air inlet, and the leakage-stopping piece is cylindrical and made of refractory materials; the leakage-stopping ring is sleeved with the leakage-stopping piece, and one end of the leakage-stopping ring slightly protrudes out of the leakage-stopping piece; the ball is also made of refractory material. When the gas flow is abnormal, the ball is sealed in the leakage-stopping ring to seal the flow passage at normal temperature; when under high temperature, the ball is tightly sealed with the leakage-proof piece to seal the flow passage.

Description

Gas safety flow controller with fire protection

technical field

The utility model relates to a gas safety flow controller used in a gas device. The flow controller has a fireproof safety design and can prevent a large amount of gas from leaking out when a fire occurs.

Background technique

At present, as shown in Figure 1, it is a known structure of a safety flow controller 10 (commonly known as a gas explosion-proof device), the air inlet 11 at one end is connected to the gas source, such as a gas cylinder or natural gas, The gas outlet 12 is connected to a gas device, such as a gas stove. An O-ring 15 and a ball 16 are installed in the flow channel 14 inside to function as a superfluid cutoff. When the gas device burns normally, the gas gas flows stably in the flow channel 14, so under normal conditions, the ball 16 remains at the position shown by the solid line in the figure, and will not be tightly attached to the O-ring 15. When the fire is extinguished and a large amount of gas leaks out, the flow velocity of the gas in the flow channel 14 will increase. According to the principle of fast flow velocity and low pressure, the pressure above the ball will decrease, so the ball 16 will be tightly bonded to the bead due to the pressure difference. The O-ring 15, as shown by the imaginary line in the figure, is used to cut off the gas flow passage, prevent the gas from leaking further, and achieve a safe function.

The applicant found that the safety flow controller, regardless of its various types, has a common defect: that is, it does not have a fire prevention function and needs to be improved.

The O-ring 15 and the ball 16 are the most important elements of the safety flow controller, and through the cooperation of the two components, the super-flow cut-off effect is produced. However, the O-ring is a rubber product, and in various conventional structures, the ball is made of plastic. According to the test and research of the applicant, when the safety flow controller is placed under high temperature, the time of only a few seconds , The O-ring 15 and the ball 16 are melted and deformed, unable to block the airflow. In other words, the flow controller loses its design purpose: the function of cutting off the superflow. Therefore, when there is a fire alarm, the safety controller loses its preventive function.

If the O-ring and the ball were in the state of superfluid cut-off before the fire broke out (i.e. the tight fit shown by the imaginary line in Figure 1), then once the O-ring and the ball melted, a large amount of gas would leak out immediately. Conversely, when a fire occurs, if the O-ring and the ball are in a normal state (i.e. not cut off), once the pipeline between the flow controller 10 and the gas device is blown and melted to allow the gas to flow out, it should have been The O-ring and the ball form a superfluid cut-off effect, which will no longer exist after melting, so the gas will leak out in large quantities. Therefore, the known safety flow controller does not have the function of cutting off the superflow in a high temperature place, and its function will be lost in a short time.

As we all know, the most serious impact in a fire accident is the gas source leaking and burning a large amount, and then an explosion occurs. The super-flow cut-off function of the safety flow controller is likely to cause misunderstandings by ordinary people, thinking that the gas can be cut off no matter in any state (even when a fire occurs), and they are negligent in preventing it. As everyone knows, the known safety controller only has its function at normal temperature, but cannot prevent gas leakage at high temperature, so once a fire occurs, it is difficult to prevent the danger of gas source explosion.

Contents of the invention

The purpose of this utility model is to provide a gas safety flow controller with fireproof function, which is characterized in that:

A casing has a gas flow channel inside, one end of the flow channel is an air inlet, and the other end is an air outlet; An anti-leakage ring and a round ball, when the gas flow is abnormal, the ball can be tightly attached to the anti-leakage ring due to the pressure difference in the flow channel;

A leak-stopping piece, in the shape of a cylinder, is made of refractory material, and the leak-stopping piece is arranged in the flow channel;

The anti-leakage ring and the anti-leakage member are coaxially inserted into each other, and the end of the anti-leakage ring facing the ball slightly protrudes out of the anti-leakage member;

The ball is made of refractory material;

Therefore, at normal temperature, the flow path is closed by the ball being tightly fitted to the leak-proof ring; at high temperature, the ball is tightly bonded to the leak-proof member to seal the flow path.

Another object of the present utility model is to provide a safety flow controller with fire prevention function, so that the safety flow controller can still provide a certain safety effect under high temperature.

In order to further understand the purpose, features and effects of the present utility model, it is now described with accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is an external partial sectional view of a safety flow controller known in the present invention.

Fig. 2 is an exploded perspective view of a preferred embodiment of the present invention.

Fig. 3 is a combined cross-sectional view of Fig. 2 and shows a normal use state.

Fig. 4 is generally the same as Fig. 3, showing the closed state of the channel in the casing.

Fig. 5 is a diagram showing the operating state of restoring the passage in the housing.

Fig. 6 is a partially enlarged view of Fig. 3, showing the leak-stopping state where the ball is tightly fitted to the leak-proof ring.

Fig. 7 shows the state where the ball is tightly bonded to the leak-proof member in a high-temperature environment.

Fig. 8 is a sectional view of another preferred embodiment of the utility model.

Fig. 9 shows the state in which the ball in Fig. 8 is in close contact with the leakage stopper.

Fig. 10 is a sectional view of another preferred embodiment of the present invention.

Detailed ways

As shown in Figure 2 and Figure 3, the first preferred embodiment of the gas safety flow controller 20 provided by the utility model includes:

A casing 30, made of metal, is a conventional component. There is a gas channel A inside, including: a first chamber 32 and a second chamber 34 penetrating through the casing from top to bottom, and an air inlet 36 and an air outlet 37 . The air inlet 36 communicates with the second chamber 34 , and the air outlet 37 communicates with the first chamber 32 . A ventilation passage 38 is disposed inside the casing, and has a horizontal section 381 and a vertical section 382 communicating with each other for enabling the first chamber 32 to communicate with the air inlet 36 .

A closure 40 is a known component, and its bottom surface is to open a shaft hole 42 that goes through, and the peripheral surface is provided with a first through hole 44 and a second through hole 45 separated from the shaft hole by 90 degrees. 42 connected. The shutter 40 is installed in the first chamber 32 in an airtight manner, and can be rotated with the chamber. When the shutter is rotated at different angular positions, the first through hole 44 and the The air outlet 37 communicates, or the second through hole 45 communicates with the horizontal section 381 of the air passage 38 .

A knob assembly 50 is also a conventional component, including a knob 52 and related components, which are arranged on the top of the housing 30 and connected to the key portion 46 of the closure 40 for turning the closure by hand.

An adjustment member 60, also a conventional member, has an end block 62 and an adjustment member 64 threaded in the end block. The adjusting member 60 is airtightly connected to the bottom of the second chamber 34 of the casing 30 .

A frame 70 has an upper ring portion 72 , a lower ring portion 74 and a rib 76 connected between the two ring portions. The frame 70 is disposed in the second chamber 34 , and the lower ring portion 74 at the bottom end thereof is supported by the adjusting member 60 . The frame is used to install superfluid cut-off components such as leak-proof rings and balls.

The utility model is characterized in that following structure:

An anti-leakage member 80 is made of metal, preferably copper, in a cylindrical shape with a hollow ring body 82 and a ring shoulder 84 with a larger outer diameter located at the top of the ring body. The anti-leakage member 80 is disposed in the second chamber 34 , the ring body 82 is embedded and engaged with the inner wall of the upper ring portion 72 of the frame 70 , and the ring shoulder 84 abuts against the top of the upper ring portion 72 .

An anti-leakage ring 90 is made of rubber and is also in the shape of a cylinder. It has an annular engagement portion 92 and a ring 94 with a larger outer diameter located at the top of the engagement portion 92 . The anti-leakage ring 90 and the anti-leakage member 80 are inserted through each other coaxially, the engagement portion 92 is in close contact with the inner wall of the ring body 82 , and the ring edge 94 is abutted against the ring shoulder 84 . Wherein, as shown in FIG. 6 , the bottom end of the engagement portion 94 of the leak-proof ring 90 slightly protrudes from the bottom end of the ring body 82 of the leak-proof member 80 .

A ball 95 is made of metal, is arranged in the frame 70, and is positioned at the bottom of the leak-stop member 80 and the leak-stop ring 90, and can move up and down. Wherein: the inner diameter of the engagement portion 92 of the leak-proof ring 90 and the inner diameter of the ring body 82 of the leak-proof member 80 are both smaller than the outer diameter of the ball 95 .

After the installation of this embodiment is completed, as shown in Figure 3, under normal use conditions, the first through hole 44 of the shutter 40 is facing the air outlet 37, while the second through hole 45 is not in contact with the air passage 38. connected; and the ball 95 is located below the leak-proof ring 90 and the leak-stop member 80 . Therefore, the gas can flow in from the gas inlet 36 , pass through the second chamber 34 and the first chamber 32 and flow out from the gas outlet 37 to be supplied to the gas device.

When the fire of the gas device is extinguished, or the gas pipeline is broken, etc., the flow velocity of the gas in the casing will increase. When the flow velocity above the ball 95 is fast, the Venturi effect will be generated, making the pressure above the ball decrease, because of the pressure difference, the ball will be pushed up, and tightly fit on the engagement portion 92 of the leak-proof ring 90, as shown in Figure 4, and is pushed up by the gas pressure to keep the engagement portion tightly Therefore, the flow channel A in the shell is closed to prevent the gas from leaking further.

After the abnormal situation is eliminated, the user, as shown in Figure 5, rotates the knob 52 to turn the closure 40, so that the second through hole 45 communicates with the air passage 38, and the first through hole 44 leaves the air outlet 37 , so that the shutter closes the air outlet. Therefore, the gas fluid can flow into the first chamber 32 from the vent passage 38 at the air inlet 36, so that the pressure on the top and bottom of the ball 95 is balanced, and the ball 95 can be dropped by gravity. In this way, the safety control The device can return to the state shown in Figure 3 and continue to use.

At normal temperature, when the controller 20 generates a super-flow cutoff, the ball 95 is tightly attached to the leak-proof ring 90, as shown in Figure 6, a good airtight effect can be achieved between the ball and the soft leak-proof ring .

In a high temperature environment, the anti-leakage ring 90 will be deformed by heat, and in this embodiment, the engaging portion 92 is made to be slightly thick, so when heated, the engaging portion will melt. The ball 95 and the leak-proof member 80 are made of metal, which can withstand heat. Therefore, when a large amount of gas gas is leaked in a high-temperature state, the pressure difference in the flow channel will make the ball 95 tightly adhere to the leak-proof member. The ring body 82 of the piece 80 is shown in Figure 7. Therefore, the utility model still has the function of sealing the flow channel A in the event of a fire.

Fig. 8 is another preferred embodiment of the utility model, showing that the utility model is applied to another type of safety flow controller 100, which includes:

A casing 110 has a gas flow channel 112 inside, one end of the flow channel is an air inlet 114 connected to a gas source, and the other end of the gas outlet 116 is connected to a gas device. An anti-leakage member 120 , an anti-leakage ring 130 and a ball 150 are respectively provided in the flow channel 112 from the air outlet 116 to the air inlet 114 .

The leakage stopper 120 is cylindrical and made of metal, and is fixed in the flow channel 112 .

The anti-leakage ring 130 is also in the shape of a cylinder, and is inserted into the inner wall of the anti-leakage member 120. The anti-leakage ring can be fixed on the inner wall of the anti-leakage member by means of sticking, or it can be fastened by its ring edge 132. In the ring groove 122 of the leak-proof member 120 . After the anti-leakage ring is installed, its engaging end 134 also protrudes slightly from the end of the anti-leakage member 120 .

The ball 140 is made of metal and is disposed on the channel 112 for airtight engagement with the leak-proof ring 130 .

A reset button group 150 is a conventional component, so it will not be repeated here. It is arranged on the housing 110 in an airtight manner, corresponding to the position of the ball 140 .

In a normal state, the ball 140 is shown by the imaginary line in the figure, and is not tightly sealed to the leakage stop ring 130, so the flow channel 112 remains unblocked for the gas to flow.

When an abnormal state occurs at normal temperature, the ball 140 is tightly fitted to the engagement end 134 of the leak-proof ring 130 to seal the flow channel 112 . After the abnormal situation is eliminated, press the reset button group 150 to push the ball 140 away from the leak-proof ring 130 to return to the normal use state.

When an abnormality occurs in a high temperature state, the leak-stop ring 130 is heated and melted, and the ball 140 is tightly attached to the lip 124 of the leak-stop member 120, as shown in FIG. 9, to seal the flow channel 112 and prevent gas from leaking out.

Fig. 10 is another preferred embodiment of the present utility model, the structure of the safety flow controller 160 is generally the same as that of the previous embodiment 100, and also includes: a housing 170, and a flow channel 172 located in the housing An anti-leakage part 174, an anti-leakage ring 176 and a ball 178. Wherein, the anti-leakage ring 176 is sleeved on the outer periphery of the anti-leakage member 174 , and the engaging end 177 of the anti-leakage ring 176 protrudes slightly out of the anti-leakage member 174 for tight contact with the ball 178 . Therefore, when an abnormality occurs at normal temperature, the ball is tightly attached to the leak-proof ring; when an abnormality occurs at a high temperature, the ball is tightly attached to the leak-proof piece.

In summary, the structure provided by the utility model has the following effects:

The utility model has double anti-leakage effects: at normal temperature, the function of super-flow cut-off is achieved through the sealing of the ball on the anti-leakage ring; when a fire occurs, when the anti-leakage ring fails due to high heat, it can still The sealing of the bead and the leak-proof piece blocks the outflow of gas gas. Therefore, the greatest effect of the utility model is to enable the safety flow controller to still have the function of cutting off the super-flow in the fire alarm place, which is beyond the reach of the conventional safety flow controllers.

Furthermore, although the metal ball and the leak-proof member cannot achieve a complete airtight effect, their tight fit still has the effect of preventing a large amount of gas from leaking out, which is enough to prevent a large amount of gas from burning and causing an explosion. This preventive effect can delay the occurrence of disasters, increase the time for fire rescue, reduce the hazards of fire, and ensure the personal safety of fire rescuers.

Claims (8)

1. gas safety flow dontroller with anti-fire action is characterized in that:

One housing has a gas runner in inside, and an end of this runner is a suction port, and the other end is an air outlet; The direction toward suction port is respectively equipped with a soft seal ring and a ball along this air outlet in this runner;

One leak-stopping spare is cylindric, and for refractory material is made, this leak-stopping spare is arranged in this runner;

This seal ring and this leak-stopping spare are with the mutual socket of coaxial state, and this seal ring protrudes out this leak-stopping spare slightly towards the end of this ball;

This ball is that refractory material is made;

2. a kind of gas safety flow dontroller with anti-fire action as claimed in claim 1, it is characterized in that: this seal ring is arranged at the inwall of this leak-stopping spare.

3. a kind of gas safety flow dontroller with anti-fire action as claimed in claim 1, it is characterized in that: this seal ring is socketed on this leak-stopping spare periphery.

4. a kind of gas safety flow dontroller with anti-fire action as claimed in claim 1, it is characterized in that: the internal diameter of this seal ring and the internal diameter of this leak-stopping spare are less than the external diameter of this ball.

5. a kind of gas safety flow dontroller with anti-fire action as claimed in claim 2 is characterized in that: the periphery of this seal ring is established the bigger ring edge of an external diameter; The inwall of described leak-stopping spare is provided with an annular groove; This ring edge is fastened in this annular groove.

6. a kind of gas safety flow dontroller with anti-fire action as claimed in claim 2 is characterized in that: this leak-stopping spare has the ring body of a hollow and is located at the bigger ring shoulder of this ring body one end, external diameter, and this ring shoulder is towards this air outlet; The rank that this seal ring has a ring-type is closed portion and and is positioned at this rank and closes portion's one end, ring edge that external diameter is bigger; This rank portion of closing connects airtight in this ring body inwall, and this ring edge is butted on this ring shoulder towards this air outlet.

7. a kind of gas safety flow dontroller with anti-fire action as claimed in claim 1 is characterized in that this runner comprises in addition: be located at this housing and be one first room and one second room of arranging up and down; This suction port is communicated with second room, and this air outlet then is communicated with this first room; One venting channels is located in this housing, is communicated with this first room and this suction port; Other includes:

One closes son, and its bottom surface is past to offering the axis hole that an end is run through, and one first open-work that side face then is provided with the predetermined angle of being separated by is communicated with this axis hole with one second open-work; This closes son and is located in this first room, and can be rotated, and when this closes son and is positioned at different positions, angle, makes this first open-work be communicated with this air outlet, or this second open-work is communicated with this venting channels;

One knob assembly that rotates for staff is located at this housing top, and is connected in this and closes son;

This leak-stopping spare is located in this second room with this seal ring;

This ball is positioned at this leak-stopping spare seal ring below.

8. a kind of gas safety flow dontroller as claimed in claim 1 with anti-fire action, it is characterized in that: this leak-stopping spare, seal ring and this ball are horizontal kenel; Other includes an involution button groups, and it is located on this housing in airtight mode, corresponding to the position of this ball.

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