Pressure stabilizing valve

Abstract

The utility model provides a pressure stabilizing valve, and belongs to the technical field of valve manufacturing. The problem that an existing pressure maintaining valve is inconvenient to use is solved. The pressure stabilizing valve comprises a valve body, a valve cover, a diaphragm and a spring, the valve cover is fixedly connected with the valve body, the diaphragm is located between the valve cover and the valve body and divides the valve cover and the valve body into an upper cavity and a lower cavity, the spring is located in the upper cavity, the diaphragm is fixedly connected with a valve rod, and the valve body is provided with a channel allowing the valve rod to penetrate through. A sealing ring used for sealing the channel is embedded in the outer wall of the end, penetrating out of the channel, of the valve rod, the spring provides elastic force so that the sealing ring can keep the trend of being away from the channel, the valve body is provided with an air inlet communicated with the channel and further provided with an air outlet communicated with the lower cavity, and the valve body is provided with a switch structure used for controlling the air inlet or the air outlet to be opened and closed. The device has the advantages of being good in integration, convenient to use and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve manufacturing technical field, and particularly relates to a pressure stabilizing valve. BACKGROUND

[0002] The pressure stabilizing valve is short for pressure stabilizing valve, and is commonly used for adjusting the air inlet pressure of gas appliances such as gas stove, cartridge stove and heater, so that the working stability of the gas appliances is good.

[0003] For example, a gas pressure stabilizing valve is disclosed in Chinese patent document [application number: 202210278787.2; authorized publication number: CN114658904B], which comprises a valve seat and an end cover arranged on the valve seat, a pressure stabilizing diaphragm is arranged between the valve seat and the end cover, a valve core connected with the pressure stabilizing diaphragm is arranged in the valve seat, an adjusting spring and a switching spring are arranged in the interior of the end cover and located above the pressure stabilizing diaphragm, the top of the end cover is provided with an adjusting sleeve and an adjusting device, the adjusting device comprises an adjusting knob and a moving block, the moving block is located in the interior of the adjusting sleeve and is in sliding fit with the adjusting sleeve in the axial direction, the switching spring supports the moving block upward, the rotating fit part of the adjusting knob extends into the interior of the adjusting sleeve and is in rotating fit with the adjusting sleeve in the circumferential direction, the lower end of the rotating fit part is provided with a spiral curved surface, the upper end of the moving block is provided with an adjusting contact part in contact with the spiral curved surface, when the adjusting knob is rotated, the moving block is moved in the axial direction through the cooperation of the spiral curved surface and the adjusting contact part, so as to compress or loosen the switching spring.

[0004] The above-mentioned gas pressure stabilizing valve has the advantage of convenient adjustment, but like other existing pressure stabilizing valves, it is an independent individual and has low integration, and needs to be connected with a pipeline and a control valve during use, so the use is not convenient. SUMMARY

[0005] The utility model aims at the above-mentioned problems existing in the prior art, and provides a pressure stabilizing valve with good integration and convenient use.

[0006] The utility model discloses a pressure stabilizing valve, including valve body, valve cover, diaphragm and spring, valve cover and valve body are fixedly connected, diaphragm is located between valve cover and valve body and separates valve cover and valve body into upper chamber and lower chamber, spring is located in the upper chamber, diaphragm is fixedly connected with valve rod, valve body is equipped with the passage of valve rod and is equipped with the sealing ring for sealing the passage, the sealing ring is kept away from the tendency of the passage by the spring, the valve body has the air inlet hole that communicates to the passage, and the valve body also has the air outlet hole that communicates to the lower chamber, and the valve body is equipped with the switch structure for controlling the on-off of the air inlet hole or the air outlet hole.

[0007] In the above-mentioned pressure stabilizing valve, the switch structure is a plug valve arranged on the valve body, the valve body is connected with an air outlet pipe, the air outlet pipe is communicated with the valve cavity of the plug valve, the air outlet hole is communicated with the valve cavity of the plug valve, and the valve core of the plug valve is used for connecting or disconnecting the air outlet hole and the air outlet pipe.

[0008] In the above-mentioned pressure stabilizing valve, the valve body is provided with a flameout protection device.

[0009] In the above-mentioned pressure stabilizing valve, the valve body is provided with a flameout protection device.

[0010] As another case, in the above-mentioned pressure stabilizing valve, the switch structure includes a rotating rod in the form of a rod inserted into the valve body, the rotating rod is threadedly connected with the valve body, the outer wall of the rotating rod is embedded with an O-ring sealed to the inner wall of the valve body, the inner end of the rotating rod is provided with a conical surface, the inner wall of the air inlet hole is provided with a step for sealing the conical surface, and the valve body is threadedly connected with a nut for the outer end of the rotating rod to extend out.

[0011] In the above-mentioned pressure stabilizing valve, the valve body is threadedly connected with a valve seat, the valve seat is provided with a passage for the valve rod to pass through, and the inner wall of the valve seat is provided with a stop shoulder for the sealing ring to abut against.

[0012] In the above-mentioned pressure stabilizing valve, the valve body is provided with a connecting portion at the outer end of the air inlet hole, and the valve body is provided with external threads at the outer wall of the outer end of the air outlet hole.

[0013] Compared with the prior art, the pressure stabilizing valve has compact structure, good integration, less leakage points, convenient use, and good safety in use. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a perspective view of the pressure stabilizing valve.

[0015] Figure 2 is a front view of the structure of the pressure stabilizing valve.

[0016] Figure 3 is Figure 2 is a sectional view of the structure of the pressure stabilizing valve.

[0017] Figure 4 is a sectional view of the structure of the pressure stabilizing valve.

[0018] Figure 5 is a sectional view of the structure of the pressure stabilizing valve.

[0019] Figure 6 is Figure 5Structure sectional view of the structure after cutting along the axis of both the air outlet hole and the valve rod.

[0020] Figure 7 is the perspective view of the pressure stabilizing valve in embodiment 2.

[0021] Figure 8 is the structure top view of the pressure stabilizing valve in embodiment 2.

[0022] Figure 9 is Figure 8 structure sectional view of B-B section.

[0023] Figure 10 is Figure 8 structure sectional view of C-C section.

[0024] Figure 11 is the perspective view of the pressure stabilizing valve in embodiment 3.

[0025] Figure 12 is the structure sectional view of the pressure stabilizing valve in embodiment 3.

[0026] In the figure, 1, valve body; 2, valve cover; 3, diaphragm; 4, spring; 5, upper cavity; 6, lower cavity; 7, valve rod; 8, channel; 9, sealing ring; 10, air inlet hole; 11, air outlet hole; 12, plug valve; 13, air outlet pipe; 14, flame arrestor; 15, air inlet pipe; 16, sealing ring; 17, rotating rod; 18, O-ring; 19, step; 20, nut; 21, connecting part; 22, inclined hole; 23, valve seat. DETAILED DESCRIPTION

[0027] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments. Embodiment 1

[0028] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the constant pressure valve comprises a valve body 1, a valve cover 2, a diaphragm 3 and a spring 4, the valve cover 2 and the valve body 1 are fixed by screws, the diaphragm 3 is located between the valve cover 2 and the valve body 1 and separates the valve cover 2 and the valve body 1 into an upper cavity 5 and a lower cavity 6, the spring 4 is located in the upper cavity 5, the diaphragm 3 is fixed with a valve rod 7, in this embodiment, the valve rod 7 penetrates the middle of the diaphragm 3, the valve rod 7 is provided with a gasket supporting the bottom surface of the diaphragm 3, the valve rod 7 is also provided with a pressing plate pressing the top surface of the diaphragm 3, the valve rod 7 is threadedly connected with a locking cap pressing the pressing plate, one end of the spring 4 abuts against the valve cover 2, the other end of the spring 4 abuts against the pressing plate, the valve body 1 is provided with a passage 8 for the valve rod 7 to penetrate, in this embodiment, the passage 8 is directly machined on the valve body 1, the outer wall of the end of the valve rod 7 penetrating the passage 8 is embedded with a sealing ring 9 for sealing the passage 8, the spring 4 provides a force to make the sealing ring 9 keep away from the passage 8, the valve body 1 has an air inlet hole 10 communicating with the passage 8, the valve body 1 also has an air outlet hole 11 communicating with the lower cavity 6, the valve body 1 is provided with a switch structure for controlling the opening and closing of the air inlet hole 10 or the air outlet hole 11.

[0029] The constant pressure valve has compact structure, good integration and few leakage points by arranging the air inlet hole 10, the air outlet hole 11 and the switch structure on the valve body 1; in use, the air inlet hole 10 or the air outlet hole 11 is controlled to be in a communication state by the switch structure, the gas enters the lower cavity 6 from the air inlet hole 10 and the passage 8, and then flows out from the air outlet hole 11 for use, when the pressure at the air inlet hole 10 increases, the diaphragm 3 is pushed to overcome the force of the spring 4, drives the valve rod 7 to displace to the valve cover 2 side, reduces the opening degree between the sealing ring 9 and the passage 8, and reduces the flow of the gas entering the lower cavity 6, so that the pressure of the air outlet hole 11 does not increase to keep stable, on the contrary, when the pressure of the air inlet hole 10 decreases, the force of the spring 4 makes the opening degree between the sealing ring 9 and the passage 8 increase, the flow of the gas entering the lower cavity 6 increases, so that the pressure of the air outlet hole 11 does not decrease to keep stable, in addition, when the pressure at the air inlet hole 10 increases sharply, the diaphragm 3 drives the valve rod 7 to displace to the valve cover 2 side, so that the sealing ring 9 seals the passage 8, which avoids the gas from flowing out from the air outlet hole 11, and improves the safety in use; after use, the air inlet hole 10 or the air outlet hole 11 is controlled to be in a disconnected state by the switch structure, which ensures the safety in use.

[0030] The switch structure in the embodiment is a plug valve 12 arranged on the valve body 1. The valve body 1 is connected with an air outlet pipe 13. The air outlet pipe 13 is communicated with a valve cavity of the plug valve 12. The air outlet hole 11 is communicated to the valve cavity of the plug valve 12. The valve core of the plug valve 12 is used for communication or isolation of the air outlet hole 11 and the air outlet pipe 13. The structure of the plug valve 12 is the existing structure, which is not described here. In use, the push rod of the plug valve 12 is pressed. The push rod drives the displacement of the valve core, so that the air outlet hole 11 and the air outlet pipe 13 are communicated. The gas flows out of the air outlet pipe 13 for use. When not in use, the valve core of the plug valve 12 is in a plugging state. The air outlet hole 11 and the air outlet pipe 13 are in an isolated state. The gas cannot be discharged, which ensures the safety of use.

[0031] The valve body 1 is provided with a flameout protection device 14. In use, when the flameout protection device 14 is accidentally extinguished, the stable pressure valve is automatically closed. In the embodiment, when the flameout protection device 14 is accidentally extinguished, the valve core of the plug valve 12 is closed, which avoids the leakage of gas and ensures the safety of use.

[0032] The valve body 1 is inserted into the air inlet hole 10. The air inlet pipe 15 is arranged in the air inlet hole 10. The outer wall of the air inlet pipe 15 is embedded with at least two sealing rings 16 which are sealed to the inner wall of the valve body 1. The air inlet pipe 15 is bent at right angles. The outer end of the air inlet pipe 15 is a connecting end. In this way, the air inlet pipe 15 can rotate circumferentially relative to the axis of the air inlet hole 10. The connecting end is convenient to connect with the gas cylinder or gas pipeline. The use is convenient. The sealing rings 16 ensure the sealing. The number of the sealing rings 16 in the embodiment is three. Embodiment 2

[0033] As shown in Figure 7 , Figure 8 , Figure 9 and Figure 10 , the stable pressure valve comprises a valve body 1, a valve cover 2, a diaphragm 3 and a spring 4. The valve cover 2 and the valve body 1 are fixedly connected by screws. The diaphragm 3 is located between the valve cover 2 and the valve body 1 and separates the valve cover 2 and the valve body 1 into an upper cavity 5 and a lower cavity 6. The spring 4 is located in the upper cavity 5. The diaphragm 3 is fixedly connected with a valve rod 7. The valve body 1 is provided with a passage 8 for the valve rod 7 to pass through. The outer wall of the end of the valve rod 7 which passes through the passage 8 is embedded with a sealing ring 9 for sealing the passage 8. The spring 4 provides a elastic force to make the sealing ring 9 keep away from the passage 8. The valve body 1 has an air inlet hole 10 which is communicated with the passage 8. The valve body 1 also has an air outlet hole 11 which is communicated with the lower cavity 6. The valve body 1 is provided with a switch structure for controlling the on-off of the air inlet hole 10 or the air outlet hole 11.

[0034] The switch structure in the embodiment comprises a rotating rod 17 inserted into the valve body 1 and in the shape of a rod, the rotating rod 17 is threadedly connected with the valve body 1, and an O-ring 18 is embedded on the outer wall of the rotating rod 17 and sealed with the inner wall of the valve body 1, the inner end of the outer wall of the rotating rod 17 is a conical surface, the inner wall of the air inlet hole 10 has a step 19 for sealing the conical surface, and the valve body 1 is threadedly connected with a nut 20 for the outer end of the rotating rod 17 to extend out of. The nut prevents the rotating rod 17 from being separated from the valve body 1, and the rotating rod 17 is rotated to axially displace the rotating rod 17, so that the conical surface is away from or sealed with the step 19, thereby realizing the on-off of the air inlet hole 10.

[0035] The valve body 1 is threadedly connected with a valve seat 23, the valve seat 23 has a passage 8 for the valve rod 7 to pass through, and the inner wall of the valve seat 23 has a stop shoulder for the sealing ring 9 to abut against, which facilitates the machining of the valve body 1 and the installation of the valve rod 7. The valve body 1 is provided with a connecting portion 21 at the outer end of the air inlet hole 10, and the outer wall of the valve body 1 at the outer end of the air outlet hole 11 is provided with an external thread, the connecting portion 21 facilitates the connection of the gas cylinder or gas pipeline, and the external thread facilitates the connection of the pipeline, thereby being convenient to use.

[0036] In the embodiment, the valve cover 2 is located at the top of the valve body 1, the connecting portion 21 is arranged on the same side of the valve cover 2, and the air outlet hole 11 is located at the lower part of the valve cover 2. Embodiment 3

[0037] As shown in Figure 11 and Figure 12 , the structure and principle of the embodiment are basically the same as those of embodiment two, and the difference lies in that the valve cover 2 is obliquely fixedly connected on the valve body 1 in the embodiment, the connecting portion 21 is located at the top of the valve body 1 and arranged upward, and the air outlet hole 11 is vertically arranged downward and is communicated to the lower cavity 6 through the inclined hole 22.

[0038] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art. The specific embodiments described in the specification are only illustrative of the spirit of the utility model. The person skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the scope defined by the appended claims.

Claims

1. A pressure-stabilizing valve, comprising a valve body (1), a valve cover (2), a diaphragm (3) and a spring (4), wherein the valve cover (2) and the valve body (1) are fixedly connected, the diaphragm (3) is located between the valve cover (2) and the valve body (1) and separates the valve cover (2) and the valve body (1) into an upper chamber (5) and a lower chamber (6), the spring (4) is located in the upper chamber (5), the diaphragm (3) is fixedly connected to a valve stem (7), and the valve body (1) is provided with a passage (8) for the valve stem (7) to pass through, characterized in that: The outer wall of the end of the valve stem (7) passing through the channel (8) is embedded with a sealing ring (9) for sealing the channel (8), and the spring (4) provides elastic force to keep the sealing ring (9) away from the channel (8). The valve body (1) has an air inlet (10) connected to the channel (8), and the valve body (1) also has an air outlet (11) connected to the lower chamber (6). The valve body (1) is provided with a switch structure for controlling the opening and closing of the air inlet (10) or the air outlet (11).

2. A pressure-stabilizing valve according to claim 1, characterized in that: The switch structure is a plug valve (12) provided on a valve body (1), the valve body (1) is connected to an air outlet pipe (13), the air outlet pipe (13) is connected to a valve cavity of the plug valve (12), the air outlet hole (11) is connected to the valve cavity of the plug valve (12), and the valve core of the plug valve (12) is used for connecting or disconnecting the air outlet hole (11) and the air outlet pipe (13).

3. A pressure-stabilizing valve according to claim 2, characterized in that: The valve body (1) is provided with a flameout protection device (14).

4. A pressure-stabilizing valve according to claim 3, characterized in that: The valve body (1) is plugged with an air intake pipe (15) located in the air intake hole (10), and the outer wall of the air intake pipe (15) is embedded with at least two sealing rings (16) sealed to the inner wall of the valve body (1). The air intake pipe (15) is bent at a right angle, and the outer end of the air intake pipe (15) is a connecting end.

5. The pressure-stabilizing valve according to claim 1, characterized in that: The switch structure includes a rod-shaped rotating rod (17) inserted into the valve body (1), the rotating rod (17) is threadedly connected to the valve body (1), and the outer wall of the rotating rod (17) is embedded with an O-ring (18) sealed to the inner wall of the valve body (1), the inner end outer wall of the rotating rod (17) is a conical surface, the inner wall of the air inlet (10) has a step (19) for sealing the conical surface, and the valve body (1) is threadedly connected to a nut (20) for the outer end of the rotating rod (17) to extend.

6. A pressure-stabilizing valve according to claim 5, characterized in that: The valve body (1) is threadedly connected to a valve seat (23), the valve seat (23) has a passage (8) for the valve stem (7) to pass through, and the inner wall of the valve seat (23) has a shoulder for the sealing ring (9) to abut against.

7. A pressure-stabilizing valve according to claim 6, characterized in that: The valve body (1) is provided with a connecting portion (21) located at the outer end of the air inlet (10), and the valve body (1) is provided with an external thread on the outer wall of the outer end of the air outlet (11).

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