Gas production type electric driving valve and sliding sealing structure thereof

Abstract

The utility model discloses a gas production type electric driving valve and a sliding sealing structure thereof. The gas production type electric driving valve comprises a wedge-shaped block, a piston and an adapter valve, the adapter valve is used for being sealed and fixed in a valve shell of the gas production type electric driving valve, and a preset distance is reserved between the adapter valve and a valve cover of the gas production type electric driving valve; a first through hole section, a second through hole section and a third through hole section which are sequentially connected in the direction from the valve deck to the adapter valve are arranged in the adapter valve, and the diameter of the second through hole section is smaller than that of the first through hole section and that of the third through hole section. The piston is slidably sealed in the first through hole section in the direction from the valve deck to the adapter valve, and the slidable sealing stroke of the piston is larger than or equal to the preset distance. A wedge-shaped groove is formed in the side, back on to the valve deck, of the piston. The wedge-shaped block is installed in the wedge-shaped groove, and the wedge-shaped block and the wedge-shaped groove are sealed in the circumferential direction. According to the utility model, the pulse pressure for pushing gas can be relieved, and the sealing effect with high sealing performance can be maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive valves, in particular to a gas-producing electric drive valve and its sliding seal structure. Background Art

[0002] In the high-temperature, high-pressure and pulsed environment of fire extinguishing devices, the technical requirements for the seal of gas-producing electric drive valves are particularly strict. However, the seal design structure of traditional gas-producing electric drive valves cannot achieve the sealing effect in the high-temperature, high-pressure and pulsed environment.

[0003] Therefore, a sealing mechanism is needed that can enable the electric drive valve to achieve a high sealing effect in the high-temperature, high-pressure and pulsed environment. Summary of the Utility Model

[0004] To solve the technical problems in the background art, the utility model proposes a gas-producing electric drive valve and its sliding seal structure.

[0005] The sliding seal structure of a gas-producing electric drive valve proposed by the utility model includes: a wedge block, a piston and a transfer valve;

[0006] The transfer valve is used for being fixedly sealed in the valve housing of the gas-producing electric drive valve, and a preset distance is reserved between the transfer valve and the valve cover of the gas-producing electric drive valve; the inside of the transfer valve includes a first through-hole section, a second through-hole section and a third through-hole section that are sequentially connected in the direction from the valve cover to the transfer valve, and the diameter of the second through-hole section is smaller than the diameters of the first through-hole section and the third through-hole section;

[0007] The piston slides and seals in the first through-hole section in the direction from the valve cover to the transfer valve, and the slidable sealing stroke of the piston is greater than or equal to the preset distance; a wedge-shaped groove is formed on the side of the piston facing away from the valve cover;

[0008] The wedge block is installed in the wedge-shaped groove, the area of one end of the wedge block facing the valve cover is smaller than the area of the end facing away from the valve cover, and the wedge block is circumferentially sealed with the wedge-shaped groove.

[0009] Preferably, the wedge block is a frustum.

[0010] Preferably, the frustum is a prismoid.

[0011] Preferably, the frustum is a conical frustum.

[0012] Preferably, the frustum is made of rubber material or silica gel material.

[0013] Preferably, a receiving groove communicating with the wedge-shaped groove is further provided on the piston on the side of the wedge-shaped groove close to the valve cover, and the receiving groove is used for an interference connection with the frustum.

[0014] Preferably, the diameter of the first through-hole section is smaller than that of the third through-hole section.

[0015] The present utility model further provides a gas-producing electric drive valve, which includes the sliding seal structure as described in any one of the above.

[0016] In a specific implementation, when the external fire control system controls the initiator to start through the start wire, the initiator triggers the gas-generating agent to generate a pushing gas; then, the pushing gas enters the first valve cavity through the second valve cavity via the third valve cavity and pushes the table body towards the valve cover direction to squeeze the piston, and drives the piston towards the valve cover direction to squeeze the valve cover when the table body and the piston are relatively fixed, increasing the space volume occupied by the pushing gas, achieving the purpose of slowing down the pulse pressure of the pushing gas and maintaining high sealing performance.

[0017] In the present utility model, the proposed gas-producing electric drive valve and its sliding seal structure enable the valve head of the electric drive valve to slow down the pulse pressure of the pushing gas and maintain a high-sealing effect in an environment with high temperature, high pressure and pulsation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural diagram of a gas-producing electric drive valve in an embodiment proposed by the present utility model.

[0019] Figure 2 FIG. is a schematic structure of a gas-producing electric drive valve in an embodiment proposed by the present utility model Figure 2 .

[0020] Figure 3 FIG. is a schematic structural diagram of a gas-producing electric drive valve in another embodiment proposed by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0022] Referring to Figures 1-3 , a sliding seal structure of a gas-producing electric drive valve proposed by the present utility model includes: a wedge block 3, a piston 2 and a transfer valve 1;

[0023] The transfer valve 1 is used for being fixedly sealed in the valve housing 4 of the gas-producing electric drive valve, and a preset distance is reserved between the transfer valve 1 and the valve cover 5 of the gas-producing electric drive valve; the interior of the transfer valve 1 includes a first through-hole section, a second through-hole section and a third through-hole section that are sequentially connected from the valve cover 5 to the transfer valve 1 direction, the diameter of the second through-hole section is smaller than that of the first through-hole section and the third through-hole section, and the third through-hole section is used for installing the gas-generating agent and the initiator;

[0024] The piston 2 is slidably sealed in the first through-hole section in the direction from the valve cover 5 to the switching valve 1, and the slidable sealing stroke of the piston 2 is greater than or equal to a preset distance; a wedge-shaped groove is formed on the side of the piston 2 facing away from the valve cover 5.

[0025] The wedge-shaped block 3 is installed in the wedge-shaped groove. The area of one end of the wedge-shaped block 3 facing the valve cover 5 is smaller than the area of the end facing away from the valve cover 5, and the wedge-shaped block 3 is circumferentially sealed with the wedge-shaped groove.

[0026] In specific implementation, when the external fire control system controls the initiator to start through the starting wire 6, the initiator triggers the gas generating agent to generate propelling gas; then, the propelling gas enters the first valve cavity through the second valve cavity via the third valve cavity and pushes the table body in the direction of the valve cover 5 to squeeze the piston 2, and drives the piston 2 to move in the direction of the valve cover 5 to squeeze the valve cover 5 when the table body and the piston 2 are relatively fixed, increasing the space volume occupied by the propelling gas. This sliding sealing structure can achieve the purpose of slowing down the pulse pressure of the propelling gas and maintaining high sealing performance.

[0027] The sliding sealing structure in the present utility model can slow down the pulse pressure of the propelling gas and maintain a high-sealing effect in an environment with high temperature, high pressure and pulsation.

[0028] In this embodiment, the wedge-shaped block 3 is a table body to facilitate ensuring the circumferential sealing effect.

[0029] It should be noted that in this embodiment, a plane parallel to the bottom surface of the cone is used to cut the cone, and the part between the bottom surface and the cross-section is called a table body.

[0030] In one specific embodiment, the table body is a frustum.

[0031] In a further specific embodiment, the frustum is a regular frustum to ensure uniform stress and thus improve the sealing performance.

[0032] In one specific embodiment, the table body is a conical frustum to ensure uniform stress and thus improve the sealing performance.

[0033] In a further embodiment, the table body is made of rubber material or silicone material.

[0034] With such a setting in this embodiment, when high-temperature, high-pressure and pulsating gas is formed, the table body deforms due to high pressure and forms a surface seal with the sealing groove of the piston 2, effectively improving the sealing performance and changing the gas flow path to reduce the linear impact of high-temperature and high-pressure gas.

[0035] Refer to Figure 3 , in a further embodiment, a receiving groove communicating with the wedge-shaped groove is further provided on the piston 2 on the side of the wedge-shaped groove close to the valve cover 5, and the receiving groove is used for interference connection with the table body.

[0036] In this embodiment, the table body can be deformed under the gas pressure of the driving gas, occupy the slow accommodation groove, so as to form an interference connection with better sealing performance. The flow air passage between the driving gas and the table body changes from a straight line to a curve, and the pulse pressure instantaneously forms to make the piston 2 move leftward, increasing the volume of the air cavity occupied by the driving gas, so as to reduce the pulse pressure.

[0037] In this embodiment, the diameter of the first through-hole section is smaller than that of the third through-hole section, so as to form a greater driving force on the table body.

[0038] The present utility model also proposes a gas-producing electric drive valve, including the sliding seal structure described in any one of the above.

[0039] Specifically, the gas-producing electric drive valve further includes: a starting wire 6, a valve cover 5 and a valve housing 4;

[0040] The first end of the valve housing 4 is hermetically and fixedly connected to the valve cover 5, and the second end is used for connecting the fire extinguishing agent;

[0041] The transfer valve 1 is hermetically fixed in the valve housing 4, and a preset distance is reserved between the transfer valve 1 and the valve cover 5; the interior of the transfer valve 1 includes a first through-hole section, a second through-hole section and a third through-hole section that are sequentially connected in the direction from the valve cover 5 to the transfer valve 1. The diameter of the second through-hole section is smaller than that of the first through-hole section and the third through-hole section, and the third through-hole section is used for installing the gas-producing agent and the initiator;

[0042] The piston 2 is slidably and hermetically connected in the first through-hole section along the direction from the valve cover 5 to the transfer valve 1, and the slidable sealing stroke of the piston 2 is greater than or equal to the preset distance; a wedge-shaped groove is provided on the side of the piston 2 facing away from the valve cover;

[0043] The wedge-shaped block 3 is installed in the wedge-shaped groove. The area of one end of the wedge-shaped block 3 facing the valve cover 5 is smaller than that of the end facing away from the valve cover 5, and the wedge-shaped block 3 is circumferentially sealed with the wedge-shaped groove;

[0044] A spike part that is axially slidably connected to the interior of the valve housing 4 and a valve body diaphragm that is coaxially and hermetically fixed to the interior of the valve housing 4 are installed in the valve housing 4 between the transfer valve 1 and the second end. A fire extinguishing agent discharge outlet is provided on the valve housing 4 between the transfer valve 1 and the valve body diaphragm;

[0045] One end of the starting wire 6 is used for electrical connection with the fire control system, and the other end passes through the valve cover 5, the piston 2, the wedge-shaped block 3, the second through-hole section and is electrically connected to the initiator located in the third through-hole section, and the starting wire 6 is hermetically connected to the wedge-shaped block 3.

[0046] When the external fire control system starts the initiator through the starting wire 6, the initiator causes the gas generating agent to generate a propelling gas; then, the propelling gas enters the first valve cavity through the second valve cavity via the third valve cavity and pushes the table body towards the valve cover 5 to squeeze the piston 2, and drives the piston 2 towards the valve cover 5 to squeeze the valve cover 5 when the table body and the piston 2 are relatively fixed, increasing the space volume occupied by the propelling gas, achieving the purpose of slowing down the pulse pressure of the propelling gas and maintaining high tightness; since the moving distance of the piston 2 is limited, at the same time, the propelling gas pushes the spike part to pierce the valve body diaphragm, and the fire extinguishing agent flows out and is ejected from the fire extinguishing agent discharge outlet to extinguish the fire.

[0047] The utility model enables the electric drive valve to slow down the pulse pressure of the propelling gas and maintain a high tightness sealing effect in an environment with high temperature, high pressure and pulsation.

[0048] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model, according to the technical solution of the utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the utility model.

Claims

1. A sliding seal structure of a gas-producing electric drive valve, characterized in that, Comprising: A wedge block (3), a piston (2) and a transfer valve (1); The transfer valve (1) is used for being hermetically fixed within a valve housing (4) of a gas-producing electric drive valve, and a preset distance is reserved between the transfer valve (1) and a valve cover (5) of the gas-producing electric drive valve; the interior of the transfer valve (1) includes a first through-hole section, a second through-hole section and a third through-hole section that are sequentially connected in the direction from the valve cover (5) to the transfer valve (1), and the diameter of the second through-hole section is smaller than the diameters of the first through-hole section and the third through-hole section; The piston (2) is slidably sealed within the first through-hole section in the direction from the valve cover (5) to the transfer valve (1), and the slidable sealing stroke of the piston (2) is greater than or equal to the preset distance; a wedge-shaped groove is formed on the side of the piston (2) facing away from the valve cover (5); The wedge block (3) is installed within the wedge-shaped groove, the area of one end of the wedge block (3) facing the valve cover (5) is smaller than the area of the end facing away from the valve cover (5), and the wedge block (3) is circumferentially sealed with the wedge-shaped groove.

2. The sliding seal structure of the gas-producing electric drive valve according to claim 1, characterized in that The wedge block (3) is a frustum.

3. The sliding seal structure of the gas-producing electric drive valve according to claim 2, wherein, The frustum is a prismoid.

4. The sliding seal structure of the gas-producing electric drive valve according to claim 2, wherein The frustum is a conical frustum.

5. The sliding seal structure of the gas-producing electric drive valve according to any one of claims 2-4, characterized in that, The frustum is made of a rubber material or a silica gel material.

6. The sliding seal structure of the gas-producing electric drive valve according to claim 5, characterized in that, A receiving groove communicating with the wedge-shaped groove is further provided on the piston (2) on the side of the wedge-shaped groove close to the valve cover (5), and the receiving groove is used for an interference connection with the frustum.

7. The sliding seal structure of the gas-producing electric drive valve according to claim 5, characterized in that, The diameter of the first through-hole section is smaller than the diameter of the third through-hole section.

8. A gas-producing electric drive valve, characterized in that, Comprising the sliding seal structure according to any one of claims 1-7.

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