Pressure stabilizing valve

Abstract

The utility model discloses a pressure stabilizing valve which comprises a pressure stabilizing valve body and a switch assembly. The switch assembly comprises a switch valve body, a diaphragm piece and an electromagnetic valve, the switch valve body is connected with the pressure stabilizing valve body, the switch valve body is provided with an air inlet channel, an air outlet channel, a diaphragm cavity and a bypass channel, and the diaphragm piece is arranged in the diaphragm cavity and divides the diaphragm cavity into an upstream cavity and a downstream cavity; the gas inlet channel is used for inputting gas and is communicated with the upstream cavity and the downstream cavity, the gas outlet channel is communicated with the downstream cavity through a communication port, the communication port is opposite to the diaphragm piece and can be blocked by the diaphragm piece, and the bypass channel is used for communicating the upstream cavity and the gas outlet channel; the electromagnetic valve is arranged on the switch valve body and used for controlling connection and disconnection between the upstream cavity and the bypass channel. According to the pressure stabilizing valve of the structure, large-flow control can be achieved through the small electromagnetic valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas valve, in particular to a pressure stabilizing valve. BACKGROUND

[0002] Some existing pressure stabilizing valves are provided with a switch assembly, which can control the output and disconnection of gas through the switch assembly. The current pressure stabilizing valve mainly realizes disconnection by directly cutting off the gas passage through a solenoid valve. For valves with large gas flow, this structure requires a large-power and large-size solenoid valve to realize, which is high in cost and large in size. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, the utility model provides a pressure stabilizing valve, which can realize large-flow control by using a smaller solenoid valve.

[0004] According to the pressure stabilizing valve of the utility model embodiment, the pressure stabilizing valve comprises a pressure stabilizing valve body, a switch assembly, a diaphragm piece and a solenoid valve. The switch assembly comprises a switch valve body. The switch valve body is connected with the pressure stabilizing valve body. The switch valve body is provided with an air inlet passage, an air outlet passage, a diaphragm cavity and a bypass passage. The diaphragm piece is arranged in the diaphragm cavity and divides the diaphragm cavity into an upstream cavity and a downstream cavity. The air inlet passage is used for inputting gas and is communicated with the upstream cavity and the downstream cavity. The air outlet passage is communicated with the downstream cavity through a communication port. The communication port is opposite to the diaphragm piece and can be blocked by the diaphragm piece. The bypass passage is used for communicating the upstream cavity and the air outlet passage. The solenoid valve is arranged in the switch valve body and is used for controlling the communication and disconnection between the upstream cavity and the bypass passage.

[0005] According to the pressure stabilizing valve of the utility model embodiment, at least the following beneficial effects are achieved: when the solenoid valve disconnects the communication between the upstream cavity and the bypass passage, the gas entering the upstream cavity from the air inlet passage gathers to form high pressure and is higher than the pressure of the downstream cavity. Under the action of the gas pressure, the diaphragm piece deforms towards the downstream cavity and blocks the communication port, so as to cut off the gas output. After the solenoid valve makes the upstream cavity and the bypass passage communicate with each other, the gas can enter the air outlet passage through the bypass passage, so as to balance the pressure of the upstream cavity and the downstream cavity. The diaphragm can reset and open the communication port, so as to normally output the gas from the air inlet passage to the air outlet passage through the communication port. The above-mentioned pressure stabilizing valve does not directly control the communication and disconnection of the air inlet passage and the air outlet passage, but uses the gas pressure difference principle to realize the communication and disconnection of the whole pressure stabilizing valve by controlling the communication and disconnection of the bypass gas. The flow of the bypass passage can be small, so that a smaller solenoid valve can be used to realize control, thereby reducing the cost and size.

[0006] According to some embodiments of the utility model, the cavity wall of upstream cavity is equipped with first communication hole, upstream cavity passes first communication hole with bypass channel intercommunication, solenoid valve is equipped with scalable action's plugging part, plugging part with first communication hole opposite.

[0007] According to some embodiments of the utility model, the switch valve body includes a main seat body and a cover seat body arranged separately, the main seat body and the cover seat body are connected and enclosed to form the diaphragm cavity, the periphery of the diaphragm piece is clamped and fixed between the main seat body and the cover seat body.

[0008] According to some embodiments of the utility model, the diaphragm piece includes a diaphragm body and a mounting portion connected to the periphery of the diaphragm body, the main seat body is provided with a mounting groove matched with the mounting portion, the mounting portion has an outer peripheral surface and an inner peripheral surface, and the mounting groove has an outer groove wall and an inner groove wall corresponding to the outer peripheral surface and the inner peripheral surface of the mounting portion respectively, and the mounting portion is clamped between the outer groove wall and the inner groove wall.

[0009] According to some embodiments of the utility model, the inlet channel is communicated with the upstream cavity through a second communication hole, the periphery of the diaphragm piece is provided with a first sealing lug, the first sealing lug is clamped and fixed between the main seat body and the cover seat body, the inlet channel is provided in the main seat body, and the second communication hole is provided in the main seat body and the first sealing lug.

[0010] According to some embodiments of the utility model, the bypass channel includes a front section channel and a rear section channel provided in the cover seat body and the main seat body respectively, the periphery of the diaphragm piece is provided with a second sealing lug, the second sealing lug is clamped and fixed between the main seat body and the cover seat body, and the front section channel and the rear section channel are communicated with each other through an opening provided in the second sealing lug.

[0011] According to some embodiments of the utility model, the diaphragm piece includes a diaphragm body, the diaphragm body is connected with a support plate, the diaphragm body and the support plate are attached, the support plate is located on the side of the diaphragm body away from the communication port, and the area projection of the support plate towards the communication port covers the communication port.

[0012] According to some embodiments of the utility model, the center of the diaphragm body is provided with a buckle block, the support plate is provided with a clamping hole, and the buckle block is clamped in the clamping hole.

[0013] According to some embodiments of the utility model, the cavity wall of upstream cavity is equipped with first communication hole, upstream cavity passes first communication hole with bypass channel intercommunication, solenoid valve is used for opening and closing first communication hole, diaphragm piece includes diaphragm body, the cavity wall of upstream cavity is equipped with support ring around the hole axis of first communication hole, support ring is opposite with diaphragm body, support ring is equipped with the communication gap of communicating its inside and outside.

[0014] According to some embodiments of the utility model, the switch assembly is connected to the gas outlet side of the pressure stabilizing valve body, and the gas inlet channel is in communication with the output port of the pressure stabilizing valve body.

[0015] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0017] Fig. 1 It is a perspective view of the embodiment of the utility model;

[0018] Fig. 2 It is a sectional view of the embodiment of the utility model;

[0019] Fig. 3 It is the explosion schematic view of the embodiment of the utility model.

[0020] Reference signs:

[0021] Pressure stabilizing valve body 100;

[0022] Switch assembly 200;Switch valve body 210, gas inlet channel 211, gas outlet channel 212, diaphragm cavity 213, bypass channel 214, upstream cavity 2131, downstream cavity 2132, communication port 215, first communication hole 216, main seat body 217, cover seat body 218, installation groove 2171, second communication hole 219, support ring 2101, communication gap 2102;Diaphragm piece 220, diaphragm body 221, installation part 222, first sealing lug 223, front section channel 2141, rear section channel 2142, second sealing lug 224, support plate 225;Solenoid valve 230, plugging part 231. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0026] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0027] Referring to Figs. 1 to 3 A pressure stabilizing valve, comprising: a pressure stabilizing valve body 100 and a switch assembly 200. The switch assembly 200 comprises a switch valve body 210, a diaphragm 220 and a solenoid valve 230, the switch valve body 210 is connected with the pressure stabilizing valve body 100, the switch valve body 210 is provided with an inlet passage 211, an outlet passage 212, a diaphragm cavity 213 and a bypass passage 214, the diaphragm 220 is arranged in the diaphragm cavity 213 and divides the diaphragm cavity 213 into an upstream cavity 2131 and a downstream cavity 2132, the inlet passage 211 is used for inputting gas and is communicated with the upstream cavity 2131 and the downstream cavity 2132, the outlet passage 212 is communicated with the downstream cavity 2132 through a communication port 215, the communication port 215 is opposite to the diaphragm 220 and can be blocked by the diaphragm 220, the bypass passage 214 is used for communicating the upstream cavity 2131 and the outlet passage 212, and the solenoid valve 230 is arranged in the switch valve body 210 and is used for controlling the communication and disconnection between the upstream cavity 2131 and the bypass passage 214.

[0028] When the electromagnetic valve 230 disconnects the communication between the upstream cavity 2131 and the bypass passage 214, the gas entering the upstream cavity 2131 from the gas inlet passage 211 gathers to form high pressure and is higher than the pressure of the downstream cavity 2132, under the action of the gas pressure, the diaphragm 220 deforms towards the downstream cavity 2132 and blocks the communication port 215, thereby cutting off the gas output; after the electromagnetic valve 230 makes the upstream cavity 2131 and the bypass passage 214 communicate with each other, the gas can enter the gas outlet passage 212 through the bypass passage 214, thereby balancing the pressure of the upstream cavity 2131 and the downstream cavity 2132, the diaphragm can reset and open the communication port 215, so that the gas is normally output from the gas inlet passage 211 to the gas outlet passage 212 through the communication port 215. The above-mentioned pressure stabilizing valve, the electromagnetic valve 230 does not directly control the on-off of the gas inlet passage 211 and the gas outlet passage 212, but uses the principle of gas pressure difference to control the on-off of the entire pressure stabilizing valve by controlling the on-off of the bypass gas, the flow of the bypass passage can be set smaller, so that a smaller electromagnetic valve 230 can be used for control, thereby reducing the cost and reducing the volume.

[0029] In the embodiment, the cavity wall of the upstream cavity 2131 is provided with a first communication hole 216, the upstream cavity 2131 communicates with the bypass passage 214 through the first communication hole 216, and the electromagnetic valve 230 is provided with a retractable sealing part 231 opposite to the first communication hole 216. In the embodiment, the electromagnetic valve 230 can be some electromagnet or other retractable driving structure.

[0030] In the embodiment, the switch valve body 210 includes a main seat body 217 and a cover seat body 218 arranged in two parts, the main seat body 217 and the cover seat body 218 are connected and surrounded to form a diaphragm cavity 213, and the periphery of the diaphragm 220 is clamped and fixed between the main seat body 217 and the cover seat body 218. With the above structure, the diaphragm 220 can be conveniently fixed, and the upstream cavity 2131 and the downstream cavity 2132 can be formed, and the production and manufacturing are convenient.

[0031] In the embodiment, the diaphragm 220 includes a diaphragm body 221 and a mounting part 222 connected to the periphery of the diaphragm body 221, the main seat body 217 is provided with a mounting groove 2171 matched with the mounting part 222, the mounting part 222 has an outer peripheral surface and an inner peripheral surface, the mounting groove 2171 has an outer groove wall and an inner groove wall corresponding to the outer peripheral surface and the inner peripheral surface of the mounting part 222 respectively, and the mounting part 222 is clamped between the outer groove wall and the inner groove wall. With the above structure, the diaphragm 220 can be stably fixed and has good sealing performance.

[0032] In the embodiment, the air inlet channel 211 communicates with the upstream cavity 2131 through the second communication hole 219, the peripheral side of the diaphragm member 220 is provided with the first sealing lug 223, the first sealing lug 223 is clamped and fixed between the main seat body 217 and the cover seat body 218, the air inlet channel 211 is arranged on the main seat body 217, and the second communication hole 219 is arranged on the main seat body 217 and the first sealing lug 223. By using the above structure, the second communication hole 219 is arranged by using the first sealing lug 223 arranged on the peripheral side of the diaphragm member 220, so that the structure is simple and the sealing is reliable.

[0033] In the embodiment, the bypass channel 214 includes the front section channel 2141 and the rear section channel 2142 arranged on the cover seat body 218 and the main seat body 217 respectively, the peripheral side of the diaphragm member 220 is provided with the second sealing lug 224, the second sealing lug 224 is clamped and fixed between the main seat body 217 and the cover seat body 218, and the front section channel 2141 and the rear section channel 2142 are communicated with each other through the opening arranged on the second sealing lug 224. By using the above structure, the bypass channel 214 is arranged in sections on the main seat body 217 and the cover seat body 218, which is beneficial to reduce the processing difficulty, and the opening for communicating the front section channel 2141 and the rear section channel 2142 is arranged by using the second sealing lug 224 arranged on the peripheral side of the diaphragm member 220, so that the structure is simple and the sealing is reliable.

[0034] In the embodiment, the diaphragm body 221 is connected with the support plate 225, the diaphragm body 221 and the support plate 225 are attached, the support plate 225 is located on the side of the diaphragm body 221 away from the communication port 215, and the area projection of the support plate 225 towards the communication port 215 covers the communication port 215. By using the above structure, the support plate 225 can make the diaphragm body 221 flat and provide support, so that the diaphragm body 221 is more reliable when sealing the communication port 215.

[0035] In the embodiment, the center of the diaphragm body 221 is provided with a buckle block, the support plate 225 is provided with a clamping hole, and the buckle block is clamped in the clamping hole. By using the above structure to fix the diaphragm body 221 and the support plate 225, the structure is simple and the installation is convenient. Of course, it can be imagined that the diaphragm body 221 and the support plate 225 are not limited to be fixed by using the above structure, for example, the diaphragm body 221 and the support plate 225 can also be fixed by using the ways such as adhesion, fastener connection and the like.

[0036] In the embodiment, the cavity wall of the upstream cavity 2131 is provided with the support ring 2101 around the hole axis of the first communication hole 216, the support ring 2101 is opposite to the diaphragm body 221, and the support ring 2101 is provided with the communication gap 2102 for communicating the inside and the outside of the support ring 2101. By using the above structure, the diaphragm body 221 can be prevented from completely closing the first communication hole 216.

[0037] In the embodiment, the switch assembly 200 is connected to the air outlet side of the pressure stabilizing valve body 100, and the air inlet channel 211 is in communication with the output port of the pressure stabilizing valve body 100.

[0038] The technical features of the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0039] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above embodiments, and within the knowledge range of ordinary skilled in the art, various changes can be made without departing from the purpose of the utility model.

Claims

1. A pressure stabilizing valve characterized by comprising: The utility model relates to a stable pressure valve, comprising: a stable pressure valve body (100); a switch assembly (200) comprising a switch valve body (210), a diaphragm (220) and a solenoid valve (230), the switch valve body (210) is connected with the stable pressure valve body (100), the switch valve body (210) is provided with an inlet channel (211), an outlet channel (212), a diaphragm cavity (213) and a bypass channel (214), the diaphragm (220) is arranged in the diaphragm cavity (213) and divides the diaphragm cavity (213) into an upstream cavity (2131) and a downstream cavity (2132), the inlet channel (211) is used for inputting fuel gas and communicates with the upstream cavity (2131) and the downstream cavity (2132), the outlet channel (212) communicates with the downstream cavity (2132) through a communication port (215), the communication port (215) is opposite to the diaphragm (220) and can be blocked by the diaphragm (220), the bypass channel (214) is used for connecting the upstream cavity (2131) and the outlet channel (212), and the solenoid valve (230) is arranged in the switch valve body (210) and is used for controlling the communication and disconnection between the upstream cavity (2131) and the bypass channel (214).

2. The pressure stabilizing valve according to claim 1, characterized by: The upstream cavity (2131) is provided with a first communication hole (216) in the cavity wall, the upstream cavity (2131) communicates with the bypass channel (214) through the first communication hole (216), and the solenoid valve (230) is provided with a retractable blocking part (231), and the blocking part (231) is opposite to the first communication hole (216).

3. The pressure stabilizing valve according to claim 1, characterized by: The switch valve body (210) comprises a main seat body (217) and a cover seat body (218) arranged in two parts, the main seat body (217) and the cover seat body (218) are connected and enclose the diaphragm cavity (213), and the diaphragm (220) is clamped and fixed between the main seat body (217) and the cover seat body (218).

4. The pressure stabilizing valve according to claim 3, characterized by: The diaphragm (220) comprises a diaphragm body (221) and a mounting part (222) connected around the diaphragm body (221), the main seat body (217) is provided with a mounting groove (2171) matched with the mounting part (222), the mounting part (222) has an outer peripheral surface and an inner peripheral surface, the mounting groove (2171) has an outer groove wall and an inner groove wall corresponding to the outer peripheral surface and the inner peripheral surface of the mounting part (222) respectively, and the mounting part (222) is clamped between the outer groove wall and the inner groove wall.

5. The pressure stabilizing valve according to claim 3, characterized by: The air inlet channel (211) communicates with the upstream cavity (2131) through a second communication hole (219), a first sealing lug (223) is arranged on the periphery of the diaphragm member (220), the first sealing lug (223) is clamped and fixed between the main seat body (217) and the cover seat body (218), the air inlet channel (211) is arranged on the main seat body (217), and the second communication hole (219) is arranged on the main seat body (217) and the first sealing lug (223).

6. The pressure stabilizing valve according to claim 3, characterized by: The bypass channel (214) comprises a front section channel (2141) and a rear section channel (2142) arranged on the cover seat body (218) and the main seat body (217) respectively, a second sealing lug (224) is arranged on the periphery of the diaphragm member (220), the second sealing lug (224) is clamped and fixed between the main seat body (217) and the cover seat body (218), and the front section channel (2141) and the rear section channel (2142) are communicated with each other through an opening arranged on the second sealing lug (224).

7. The pressure stabilizing valve according to claim 1, characterized by: The diaphragm member (220) comprises a diaphragm body (221), the diaphragm body (221) is connected with a support plate (225), the diaphragm body (221) and the support plate (225) are attached, the support plate (225) is located on the side of the diaphragm body (221) away from the communication port (215), and the area projection of the support plate (225) towards the communication port (215) covers the communication port (215).

8. The pressure stabilizing valve according to claim 7, characterized by: A buckle block is arranged at the center of the diaphragm body (221), the support plate (225) is provided with a clamping hole, and the buckle block is clamped in the clamping hole.

9. The pressure stabilizing valve of claim 1, wherein: A first communication hole (216) is arranged on the cavity wall of the upstream cavity (2131), the upstream cavity (2131) communicates with the bypass channel (214) through the first communication hole (216), and the electromagnetic valve (230) is used for opening and closing the first communication hole (216); the diaphragm member (220) comprises a diaphragm body (221), a support ring (2101) is arranged on the cavity wall of the upstream cavity (2131) around the hole axis of the first communication hole (216), the support ring (2101) is opposite to the diaphragm body (221), and the support ring (2101) is provided with a communication gap (2102) communicating the inside and the outside of the support ring (2101).

10. The pressure stabilizing valve of claim 1, wherein: The switch assembly (200) is connected to the air outlet side of the pressure stabilizing valve body (100), and the air inlet channel (211) communicates with the output port of the pressure stabilizing valve body (100).

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