Gas cut-off position keeping electromagnetic valve

Abstract

The utility model discloses a gas cut-off position keeping electromagnetic valve which comprises a valve body, a valve element cavity, a gas inlet channel, a first working cavity, a second working cavity, a first exhaust hole, a second exhaust hole and a gas storage channel are arranged in the valve body, the gas inlet channel is communicated with an external gas source, and the gas storage channel is communicated with the gas inlet channel. A one-way valve is arranged at the air inlet channel, the first working cavity is communicated with the air storage channel, and the air storage channel is communicated with an air storage device; the valve element assembly at least comprises a valve rod, the valve rod is inserted into the valve element cavity, and the valve rod can move to a first position and a second position in the valve element cavity. According to the utility model, the actuator can be ensured to be in an open or closed state under the conditions of power failure and gas failure.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a gas-off position-keeping electromagnetic valve. Background Art

[0002] When operating an actuator or valve under certain conditions, it's necessary for the valve to remain open or closed despite special circumstances, such as power outages or air failures. This means that in the event of a sudden power or air outage, the solenoid valve must have a working chamber with pressure output to ensure the valve opens or closes. With current solenoid valves on the market, when power or air is lost, the pressure within the actuator is exhausted to the atmosphere through the main valve's working chamber and exhaust port. This prevents the actuator from opening or closing, necessitating the installation of an auxiliary air shutoff valve. Utility Model Content

[0003] The utility model provides a gas-off position-holding electromagnetic valve, which can ensure that an actuator is in an open or closed state when power and gas are cut off.

[0004] In order to solve the above technical problems, the utility model provides a gas-cut-off retaining-position solenoid valve, which is characterized by comprising:

[0005] A valve body is provided in the valve body, wherein a valve core cavity, an air inlet passage, a first working cavity, a second working cavity, a first exhaust hole, a second exhaust hole and an air storage passage are provided, the air inlet passage is connected to an external air source, the air storage passage is connected to the air inlet passage, a one-way valve is provided at the air inlet passage, the first working cavity is connected to the air storage passage, and the air storage passage is connected to an air storage device;

[0006] A valve core assembly, the valve core assembly at least includes a valve stem, the valve stem is inserted into the valve core cavity, the valve stem can move to a first position and a second position in the valve core cavity, when the valve stem is in the first position, the air inlet channel is connected to the first working cavity, and the second working cavity is connected to the second exhaust hole, when the valve stem is in the second position, the air inlet channel is connected to the second working cavity, and the first working cavity is connected to the first exhaust hole.

[0007] As a preferred embodiment of the above technical solution, a first communicating groove and a second communicating groove are sequentially provided on the valve stem. When the valve stem is in the first position, the air intake channel is connected with the first working chamber through the first communicating groove, and the second working chamber is connected with the second exhaust hole through the second communicating groove. When the valve stem is in the second position, the air intake channel is connected with the second working chamber through the second communicating groove, and the first working chamber is connected with the first exhaust hole through the second communicating groove.

[0008] As a preferred embodiment of the above technical solution, a plurality of sealing rings are provided on the valve stem, and positions of the sealing rings correspond to positions of the first communicating groove and the second communicating groove.

[0009] As a preferred embodiment of the above technical solution, the valve core assembly further includes an elastic return member, one end of which is connected to the valve stem, and the other end of which is connected to the inner wall of the valve core cavity.

[0010] As a preferred embodiment of the above technical solution, the one-way valve includes a sealing plug and a one-way valve spring, the sealing plug is connected to the one-way valve spring, and the sealing plug can move to a sealing position and a connecting position in the valve body. When the sealing plug is in the sealing position, the air intake channel and the air storage channel are blocked, and when the sealing plug is in the connecting position, the air intake channel and the air storage channel are connected.

[0011] As a preferred embodiment of the above technical solution, the one-way valve also includes a one-way valve seat, one end of the one-way valve spring is connected to the sealing plug, and the other end of the one-way valve spring is connected to the valve seat, and the valve seat is installed inside the valve body.

[0012] As a preferred embodiment of the above technical solution, the gas storage device is an air storage bag or a backup air source.

[0013] The utility model provides a gas-cut-off position-keeping solenoid valve, characterized in that it comprises: a valve body and a valve core assembly, an air storage channel is provided in the valve body, the air storage channel is communicated with the air intake channel, a one-way valve is provided at the air intake channel, the first working chamber is communicated with the air storage channel, the air storage channel is communicated with the air storage device, the gas-cut-off position-keeping solenoid valve further comprises a pilot valve assembly, the pilot valve assembly is used to control the valve stem to move to the first position and the second position, and when the coil of the pilot valve assembly is not energized, the valve stem is in the first position, and when the gas-cut-off position-keeping solenoid valve is in a normal working state, the air intake channel is in the During air intake, part of the gas flows through the one-way valve and the air storage channel, and then enters the air storage device for storage, while another part of the gas flows into the first working chamber or the second working chamber according to the position of the valve stem, and drives the actuator to perform corresponding actions; when the power and gas are suddenly cut off, the valve stem returns to the first position, no gas enters the air intake channel, the one-way valve closes to block the air intake channel, and the gas stored in the air storage device flows from the air storage channel into the first working chamber, so that the actuator performs the action when the first working chamber is intake, ensuring the stability and safety of the system in the event of power outages and gas outages.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the explosion structure of a gas-cut-off position-holding solenoid valve in an embodiment of the present utility model;

[0016] Figure 2 This is a structural diagram of a gas-cut-off position-holding solenoid valve in an embodiment of the present utility model;

[0017] Figure 3 This is a structural diagram of a gas-cut-off position-holding solenoid valve in an embodiment of the present utility model;

[0018] Figure 4 for Figure 3 Cross-sectional view at point A;

[0019] Figure 5 for Figure 3 Cross-sectional view at point B;

[0020] In the figure: 1. valve body; 2. valve core assembly; 3. one-way valve; 101. valve core chamber; 102. air inlet channel; 103. first working chamber; 104. second working chamber; 105. first exhaust hole; 106. second exhaust hole; 107. air storage channel; 201. valve stem; 202. first connecting groove; 203. second connecting groove; 204. sealing ring; 205. elastic return member; 301. sealing plug; 302. one-way valve spring; 303. one-way valve seat. DETAILED DESCRIPTION

[0021] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0022] See also Figures 1 to 5 The present invention provides a solenoid valve for holding air in place, which is characterized by comprising:

[0023] A valve body 1 is provided with a valve core chamber 101, an air inlet channel 102, a first working chamber 103, a second working chamber 104, a first exhaust hole 105, a second exhaust hole 106, and an air storage channel 107. The air inlet channel 102 is connected to an external air source, and the air storage channel 107 is connected to the air inlet channel 102. A one-way valve 3 is provided at the air inlet channel 102. The first working chamber 103 is connected to the air storage channel 107, and the air storage channel 107 is connected to an air storage device.

[0024] The valve core assembly 2 at least includes a valve stem 201, the valve stem 201 is inserted into the valve core cavity 101, and the valve stem 201 can be moved to a first position and a second position in the valve core cavity 101. When the valve stem 201 is in the first position, the air inlet channel 102 is connected to the first working cavity 103, and the second working cavity 104 is connected to the second exhaust hole 106. When the valve stem 201 is in the second position, the air inlet channel 102 is connected to the second working cavity 104, and the first working cavity 103 is connected to the first exhaust hole 105.

[0025] The embodiment of the present utility model provides a gas-cut-off and position-maintaining solenoid valve, characterized in that it includes: a valve body 1 and a valve core assembly 2, an air storage channel 107 is provided in the valve body 1, the air storage channel 107 is communicated with the air inlet channel 102, a one-way valve 3 is provided at the air inlet channel 102, the first working chamber 103 is communicated with the air storage channel 107, the air storage channel 107 is communicated with the air storage device, the gas-cut-off and position-maintaining solenoid valve further includes a pilot valve assembly, the pilot valve assembly is used to control the valve stem 201 to move to the first position and the second position, and when the coil of the pilot valve assembly is not energized, the valve stem 201 is in the first position, and when the gas-cut-off and position-maintaining solenoid valve is in a normal working state, the air inlet channel 102 intakes air, After a portion of the gas flows through the one-way valve 3 and the gas storage channel 107, it enters the gas storage device and is stored, and another portion of the gas flows into the first working chamber 103 or the second working chamber 104 according to the position of the valve stem 201, and drives the actuator to perform corresponding actions; when the power and gas are suddenly cut off, the valve stem 201 resets to the first position, no gas enters the air intake channel 102, the one-way valve 3 closes, blocking the air intake channel 102 and the air storage channel 107, and the gas stored in the gas storage device flows from the air storage channel 107 into the first working chamber 103, so that the actuator performs the action when the first working chamber 103 is intaken, ensuring the stability and safety of the system in the event of power outages and gas outages.

[0026] In a further embodiment of the present embodiment, a first communicating groove 202 and a second communicating groove 203 are sequentially provided on the valve stem 201. When the valve stem 201 is in the first position, the air intake channel 102 is connected with the first working chamber 103 through the first communicating groove 202, and the second working chamber 104 is connected with the second exhaust hole 106 through the second communicating groove 203. When the valve stem 201 is in the second position, the air intake channel 102 is connected with the second working chamber 104 through the second communicating groove 203, and the first working chamber 103 is connected with the first exhaust hole 105 through the second communicating groove 203.

[0027] In this embodiment, the valve stem 201 is sequentially provided with a first connecting groove 202 and a second connecting groove 203. The first connecting groove 202 is arranged along the circumferential direction of the valve stem 201, and the second connecting groove 203 is arranged along the circumferential direction of the valve stem 201. The first working chamber 103 is connected to the air inlet channel 102 or the first exhaust hole 105 through the first connecting groove 202, and the second working chamber 104 is connected to the air inlet channel 102 or the second exhaust hole 106 through the second connecting groove 203. This design makes the gas flow path clear, effectively reduces the gas flow resistance, and improves the response speed and efficiency of the valve. At the same time, in the event of power outages or gas outages, this structure can quickly switch to the gas storage device for gas supply, ensuring the continuity of the actuator operation and the safety and stability of the system.

[0028] In a further embodiment of the present invention, a plurality of sealing rings 204 are provided on the valve stem 201 , and positions of the sealing rings 204 correspond to positions of the first communicating groove 202 and the second communicating groove 203 .

[0029] In this embodiment, there are several sealing rings 204, the first connecting groove 202 is located between two of the sealing rings 204, and the second connecting groove 203 is located between the other two sealing rings 204. The design of the sealing ring 204 not only ensures the airtightness of the valve stem 201 at different positions, but also reduces the friction between components, ensures the precise control of gas flow, and thus optimizes the movement accuracy of the actuator.

[0030] In a further embodiment of the present invention, the valve core assembly 2 further includes an elastic return member 205 , one end of which is connected to the valve stem 201 , and the other end of which is connected to the inner wall of the valve core cavity 101 .

[0031] In this embodiment, the valve core assembly 2 also includes an elastic return member 205, which is a return spring. When the coil of the pilot valve assembly is energized, it will drive the valve stem 201 to move from the first position to the second position. When the coil of the pilot valve assembly is not energized, the return spring will drive the valve stem 201 to return from the second position to the first position. In the case of gas and power outages, the return spring can also ensure that the valve stem 201 is in the first position, thereby ensuring that the gas in the gas storage device can be stably output to the first working chamber 103, so that the actuator performs the action when the first working chamber 103 is inhaled, ensuring the stability and safety of the system in the case of power outages and gas outages.

[0032] In a further feasible embodiment of this embodiment, the one-way valve 3 includes a sealing plug 301 and a one-way valve spring 302, the sealing plug 301 is connected to the one-way valve spring 302, and the sealing plug 301 can move to a sealing position and a connecting position in the valve body 1. When the sealing plug 301 is in the sealing position, the air intake channel 102 is blocked from the air storage channel 107, and when the sealing plug 301 is in the connecting position, the air intake channel 102 is connected to the air storage channel 107.

[0033] In this embodiment, the one-way valve 3 includes a sealing plug 301 and a one-way valve spring 302. When air is introduced into the air inlet passage 102, the gas pressure drives the sealing plug 301 to a connecting position, thereby connecting the air storage passage 107 with the air inlet passage 102 and ensuring smooth gas flow. When air is cut off from the air inlet passage 102, the one-way valve spring 302 pushes the sealing plug 301 back to the sealing position, blocking the connection between the air storage passage 107 and the air inlet passage 102, preventing the gas in the gas storage device from flowing out of the air inlet passage 102 and ensuring that the gas flows from the air storage passage 107 into the first working chamber 103, thereby causing the actuator to perform the action performed when air is introduced into the first working chamber 103, thus ensuring the stability and safety of the system in the event of power outages and air outages.

[0034] In a further feasible embodiment of this embodiment, the one-way valve 3 also includes a one-way valve seat 303, one end of the one-way valve spring 302 is connected to the sealing plug 301, and the other end of the one-way valve spring 302 is connected to the valve seat, and the valve seat is installed inside the valve body 1.

[0035] In this embodiment, the one-way valve 3 also includes a one-way valve seat 303, which is fixed inside the valve body 1, effectively supporting the one-way valve spring 302, ensuring that the sealing plug 301 can stably move to the appropriate position under changes in gas pressure, thereby enhancing the reliability and durability of the one-way valve 3.

[0036] In a further possible implementation of this embodiment, the gas storage device (not shown in the figure) is an air storage bag or a backup air source.

[0037] In this embodiment, the gas storage device is an air bag or a backup air source. Using the air bag as the gas storage device has a simple structure, is easy to install and has low maintenance costs. Using the backup air source as the gas storage device can respond quickly according to system requirements and provide stable air pressure.

[0038] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0040] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A gas-cut-off retaining solenoid valve, characterized in that: include: A valve body is provided in the valve body, wherein a valve core cavity, an air inlet passage, a first working cavity, a second working cavity, a first exhaust hole, a second exhaust hole and an air storage passage are provided, the air inlet passage is connected to an external air source, the air storage passage is connected to the air inlet passage, a one-way valve is provided at the air inlet passage, the first working cavity is connected to the air storage passage, and the air storage passage is connected to an air storage device; A valve core assembly, the valve core assembly at least includes a valve stem, the valve stem is inserted into the valve core cavity, the valve stem can move to a first position and a second position in the valve core cavity, when the valve stem is in the first position, the air inlet channel is connected to the first working cavity, and the second working cavity is connected to the second exhaust hole, when the valve stem is in the second position, the air inlet channel is connected to the second working cavity, and the first working cavity is connected to the first exhaust hole.

2. The air-off retaining solenoid valve according to claim 1, characterized in that: A first communicating groove and a second communicating groove are sequentially provided on the valve stem. When the valve stem is in the first position, the air intake channel is communicated with the first working chamber through the first communicating groove, and the second working chamber is communicated with the second exhaust hole through the second communicating groove. When the valve stem is in the second position, the air intake channel is communicated with the second working chamber through the second communicating groove, and the first working chamber is communicated with the first exhaust hole through the second communicating groove.

3. The air-off retaining solenoid valve according to claim 2, characterized in that: A plurality of sealing rings are provided on the valve stem, and positions of the sealing rings correspond to positions of the first communicating groove and the second communicating groove.

4. The air-off retaining solenoid valve according to claim 1, characterized in that: The valve core assembly further includes an elastic return member, one end of which is connected to the valve stem, and the other end of which is connected to the inner wall of the valve core cavity.

5. The air-off retaining solenoid valve according to claim 1, characterized in that: The one-way valve includes a sealing plug and a one-way valve spring, the sealing plug is connected to the one-way valve spring, and the sealing plug can move to a sealing position and a connecting position within the valve body. When the sealing plug is in the sealing position, the air intake channel and the air storage channel are blocked. When the sealing plug is in the connecting position, the air intake channel and the air storage channel are connected.

6. The air-off retaining solenoid valve according to claim 5, characterized in that: The one-way valve further includes a one-way valve seat. One end of the one-way valve spring is connected to the sealing plug, and the other end of the one-way valve spring is connected to the valve seat. The valve seat is installed inside the valve body.

7. The air-off retaining solenoid valve according to claim 1, characterized in that: The gas storage device is an air storage bag or a backup air source.

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