Diaphragm piercing type low-pressure normally-closed electric explosion valve and control method

Abstract

The invention relates to a diaphragm piercing type low-voltage normally-closed electric explosion valve and a control method, the diaphragm piercing type low-voltage normally-closed electric explosion valve comprises a valve body (1), an electric actuator (2), a diaphragm assembly (3), a limiting block (7) and an adjusting gasket (8), meanwhile, a first jacket nut (4), a second jacket nut (5) and an O-shaped rubber sealing ring (6) are arranged for fixing, and medium connection and disconnection are achieved in the mode that an actuating rod of the electric actuator extends out of a piercing diaphragm. The electric explosion valve can be used for the rear isolation electric explosion valve of the attitude and orbit control engine storage tank, and the using requirements for miniaturization and light weight are met.

Description

Technical Field

[0001] The invention relates to a diaphragm puncture type low-pressure normally closed electric explosion valve and a control method, belonging to the field of electric explosion control design. Background Art

[0002] The normally closed electric explosion valve is a one-time valve. It is normally closed before power is supplied and normally open after power is supplied. It is widely used in various systems of aerospace models because of its high reliability. The electric explosion valve of the conventional system needs to have sufficient strength to withstand high pressure in the normally closed state, and the components that withstand high pressure must be cut during electric explosion, resulting in a large amount of explosive in the electric explosion tube, and the electric explosion valve is large in size and weight. In recent years, the newly developed system only needs to be reliably sealed under relatively low pressure, and the newly developed system has requirements for miniaturization and lightweight of the electric explosion valve. The original large-volume electric explosion tube is no longer applicable. Summary of the invention

[0003] The technical problem solved by the present invention is: in view of the problem that traditional electric explosion tubes in the current prior art are difficult to adapt to the requirements of existing aerospace models, a diaphragm puncture type low-pressure normally closed electric explosion valve and a control method are proposed.

[0004] The present invention solves the above technical problems by the following technical solutions:

[0005] A diaphragm puncture type low-pressure normally closed electric explosion valve, comprising a valve body, an electric actuator, a diaphragm assembly, a limit block, and an adjustment gasket;

[0006] The valve body is configured as a three-way structure, the left side is used to connect the electric actuator interface, the right side is used to install the diaphragm assembly, and the upper side is used to weld and connect to the external tank structure; limit blocks are set on both sides of the connection position of the electric actuator and the diaphragm assembly to prevent the diaphragm assembly flow channel from being blocked during the actuation of the electric actuator; the adjustment gasket is installed in the setting gap between the valve body and the electric actuator, and the axial spacing between the electric actuator and the diaphragm assembly is adjusted by adjusting the gasket thickness, which is used to prevent the electric actuator and the diaphragm assembly from colliding and ensure the success rate of the actuation process.

[0007] The upper end face of the valve body is welded to the end face of the storage tank after being fitted, the left end face is fitted to the adjusting gasket for limiting the electric actuator, and the right end face is fitted to the flange of the diaphragm assembly for limiting the position. The left and right outer cylindrical surfaces of the valve body are processed with threads, and the first outer sleeve nut and the second outer sleeve nut are arranged on both sides to respectively connect and fix the electric actuator and the diaphragm assembly.

[0008] The second outer sleeve nut is connected to an external pipeline through the right thread to guide the internal medium of the point actuator to flow out through the diaphragm assembly.

[0009] The positive and negative electrode wires extend from the left end surface of the electric actuator, and the actuating rod extends from the right end surface. After the positive and negative electrode wires are powered, the actuating rod extends to the right to pierce the diaphragm of the diaphragm assembly.

[0010] The diaphragm assembly comprises a diaphragm and a pipe connection nozzle, the diaphragm and the pipe connection nozzle are welded and connected, the actuating rod is limited by a limit block before actuation and punctures the diaphragm after actuation; the diaphragm is arranged on the inner side of the pipe connection nozzle.

[0011] The diaphragm is processed by laser etching technology to provide an Ω-shaped notch, the remaining thickness of the Ω-shaped notch is no more than 1 / 2 of the overall thickness of the diaphragm assembly and no less than a preset thickness, and the inner part of the Ω-shaped notch flips backwards under the axial force generated when the actuating rod is actuated to open the medium passage behind the diaphragm.

[0012] It also includes an O-shaped rubber sealing ring, which is installed in the rubber ring groove of the valve body, the nozzle and the outer sleeve nut to prevent the leakage of the medium.

[0013] The limit block includes a base body and a flow channel. The base body is milled with four flow channels of the same structural size for medium circulation. After the diaphragm is punctured, the liquid medium flows into the diaphragm assembly from the storage tank structure connected to the upper end face of the valve body and flows out through the punctured diaphragm.

[0014] The adjusting gasket is installed between the valve body and the electric actuator. The thickness is adjusted by turning to ensure that the distance between the right end of the actuating rod and the diaphragm is 0.05-0.15mm, so as to avoid the right end of the actuating rod colliding with the diaphragm during the installation process and ensure that the diaphragm is completely broken during the actuation process.

[0015] A control method according to a diaphragm puncture type low-pressure normally closed electric explosion valve, comprising:

[0016] Connect the external power supply to the left side of the valve body through the left side, install the diaphragm assembly through the right side of the valve body, and weld the end surface of the upper side to connect to the external tank structure;

[0017] The thickness of the gasket is preset to ensure that the distance between the right end of the actuator rod and the diaphragm is kept within the preset range; the limit block is set to prevent the actuator housing end surface from moving rightward and blocking the flow channel when the actuator rod extends to the right;

[0018] The electric actuator is started by connecting electricity through the positive and negative wires. After the electricity is connected, the actuator rod moves to the right to pierce the diaphragm of the diaphragm assembly, and the medium flows out of the diaphragm assembly.

[0019] The advantages of the present invention compared with the prior art are:

[0020] (1) The present invention provides a diaphragm-puncturing low-pressure normally closed electric explosion valve and control method, which realizes the on-off of the medium by extending the actuating rod of the electric actuator to puncture the diaphragm. The energy required for the diaphragm to rupture is small, so the required electric actuator has a small volume and weight, and consumes less power, which is conducive to lightweight and miniaturization of the product; the electric explosion energy is sealed inside the electric actuator, and except for the diaphragm component, the structure of other components will not be damaged after the electric explosion, and can be reused, which is low in cost;

[0021] (2) The present invention can avoid plastic deformation after the diaphragm ruptures, and the opening direction of the diaphragm is consistent with the flow direction of the medium. The diaphragm opening state is stable, and there is no risk of the cutter retreating under the action of the medium force after the traditional electric explosion valve is exploded, causing the flow channel to be blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural cross-sectional view of a diaphragm puncture type low-pressure normally closed electric explosion valve provided for the invention;

[0023] Figure 2 A schematic diagram of the structure of the diaphragm assembly provided for the invention;

[0024] Figure 3 A schematic diagram of the structure of the diaphragm provided for the invention;

[0025] Figure 4 A schematic diagram of the structure of the limit block provided for the invention; DETAILED DESCRIPTION

[0026] A diaphragm-punctured low-pressure normally closed electric explosion valve and a control method thereof, comprising an electric explosion valve structure including a valve body 1, an electric actuator 2, a diaphragm assembly 3, a limit block 7, and an adjusting gasket 8, and being fixed with a first outer sleeve nut 4, a second outer sleeve nut 5, and an O-shaped rubber sealing ring 6. The medium is switched on and off by extending an actuating rod of the electric actuator to puncture the diaphragm. The electric explosion valve can be used for isolating an electric explosion valve at the rear of an attitude and track control engine tank, and meets the requirements of miniaturization and lightness.

[0027] The valve body 1 is configured as a three-way structure, the left side is used for connecting the interface of the electric actuator 2, the right side is used for installing the diaphragm assembly 3, and the upper side is used for welding and connecting to the external tank structure; limit blocks 7 are provided on both sides of the connection position of the electric actuator 2 and the diaphragm assembly 3 to prevent the flow channel of the diaphragm assembly 3 from being blocked during the actuation of the electric actuator 2; an adjusting gasket 8 is installed at the setting gap between the valve body 1 and the electric actuator 2, and the axial spacing between the electric actuator 2 and the diaphragm assembly 3 is adjusted by adjusting the thickness of the gasket 8, so as to prevent the electric actuator 2 and the diaphragm assembly 3 from colliding with each other and ensure the success rate of the actuation process.

[0028] The upper end face of the valve body 1 is welded to the end face of the storage tank after being fitted, the left end face is fitted to the adjusting gasket 8 for limiting the electric actuator 2, and the right end face is fitted to the flange of the diaphragm assembly 3 for limiting the position. The left and right outer cylindrical surfaces of the valve body 1 are processed with threads, and the first outer sleeve nut 4 and the second outer sleeve nut 5 are arranged on both sides to respectively connect and fix the electric actuator 2 and the diaphragm assembly 3.

[0029] The second outer sleeve nut 5 is connected to the external pipeline through the right thread to guide the internal medium of the point actuator 2 to flow out through the diaphragm assembly 3;

[0030] A positive and negative lead wire 22 extends from the left end face of the electric actuator 2 , and an actuating rod 21 extends from the right end face. After the positive and negative lead wires 22 are powered, the actuating rod 21 extends to the right to pierce the diaphragm of the diaphragm assembly 3 .

[0031] The diaphragm assembly 3 includes a diaphragm 31 and a pipe nozzle 32 . The diaphragm 31 and the pipe nozzle 32 are welded together. The actuating rod 21 is limited by the limit block 7 before actuation and punctures the diaphragm 31 after actuation. The diaphragm 31 is arranged inside the pipe nozzle 32 .

[0032] The diaphragm 31 is provided with an Ω-shaped notch 311 by laser etching technology. The remaining thickness of the Ω-shaped notch 311 is no greater than 1 / 2 of the overall thickness of the diaphragm assembly 3 and no less than a preset thickness. The inner portion of the Ω-shaped notch 311 is driven by the axial force generated when the actuating rod 21 is actuated to flip backward to open the medium passage behind the diaphragm 31.

[0033] The O-shaped rubber sealing ring 6 is installed in the rubber ring groove of the valve body 1, the nozzle 32 and the outer sleeve nut 5 to prevent the leakage of the medium.

[0034] The limiting block 7 comprises a base body 71 and a flow channel 72 . Four flow channels 72 with the same structure and size are milled on the base body 71 for medium circulation.

[0035] The adjusting gasket 8 is installed between the valve body 1 and the electric actuator 2. The thickness is adjusted by turning to ensure that the distance between the right end of the actuating rod 21 and the diaphragm 31 is 0.05-0.15 mm to avoid the right end of the actuating rod 21 colliding with the diaphragm 31 during the installation process and ensure that the diaphragm 31 is completely broken during the actuation process.

[0036] After the diaphragm 31 is punctured, the liquid medium flows into the diaphragm assembly 3 from the storage tank structure connected to the upper end surface of the valve body 1, and flows out through the punctured diaphragm 31.

[0037] The control method of the diaphragm puncture type low-pressure normally closed electric explosion valve is as follows:

[0038] Connect the external power supply to the left side of the valve body 1, install the diaphragm assembly 3 through the right side of the valve body 1, and weld the end surface of the upper side of the valve body 1 to connect the external tank structure;

[0039] The thickness of the gasket 8 is preset to ensure that the distance between the right end of the actuating rod 21 and the diaphragm 31 is kept within a preset range; the limit block 7 is provided to prevent the end surface of the housing of the actuator 2 from moving rightward and blocking the flow channel when the actuating rod 21 extends to the right;

[0040] The electric actuator 2 is started by connecting electricity through the positive and negative wires 22 . After connecting electricity, the actuating rod 21 moves to extend to the right to pierce the diaphragm 31 of the diaphragm assembly 3 , and the medium flows out of the diaphragm assembly 3 .

[0041] The following is further described in conjunction with the accompanying drawings and preferred embodiments of the specification:

[0042] In the current embodiment, if Figure 1 The figure shows a schematic diagram of the structure of a diaphragm puncture type electric explosion valve, which is characterized by comprising a valve body 1, an electric actuator 2, a diaphragm assembly 3, outer sleeve nuts 4, 5, an O-shaped rubber sealing ring 6, a limit block 7, and an adjusting gasket 8.

[0043] The valve body 1 is a three-way structure. The left side is used for the installation of the electric actuator 2, and the right side is used for the installation of the diaphragm assembly 3. The upper inlet is welded to the tank outlet; the upper end face is welded after being fitted with the tank end face, the left end face is fitted with the adjustment gasket 8 for the electric actuator 2 limit, and the right end face is fitted with the flange of the diaphragm assembly 3 for limit. The outer cylindrical surfaces on the left and right sides of the valve body 1 are threaded, and the electric actuator 2 and the diaphragm assembly 3 are fixed by threaded connection with the outer sleeve nuts 4 and 5. The right side of the outer sleeve nut 5 is threadedly connected to the pipeline to guide the medium to flow into the downstream of the system.

[0044] The electric actuator 2 is a mature product of a certain institute, with two positive and negative wires 22 on the left side and an actuating rod 21 on the right side. After a certain voltage is applied to the wires, the actuating rod 21 extends to the right to pierce the diaphragm.

[0045] like Figure 2 As shown, it is a schematic diagram of the structure of the diaphragm assembly 3. The diaphragm assembly 3 is formed by laser welding of a diaphragm 31 and a nozzle 32. The diaphragm is processed into an "Ω"-shaped notch 311 by laser etching technology. The remaining thickness of the notch is less than or equal to 1 / 2 of the thickness of the parent material and not less than 0.02mm. The inner part of the notch flips backward under the axial force when the actuating rod is actuated, and the medium passage is opened. The schematic diagram of the structure of the diaphragm 31 is shown in FIG. Figure 3 .

[0046] The O-shaped rubber sealing ring 6 is installed in the rubber ring groove of the valve body 1, the nozzle 32, and the outer sleeve nut 5 (a total of 4 places) to prevent the leakage of the medium.

[0047] like Figure 4The figure shows a schematic diagram of the limit block structure. The limit block 7 is located between the electric actuator 2 and the diaphragm assembly 3, and is used to prevent the actuator rod 21 from extending to the right, driving the end surface of the actuator 2 housing to move to the right and blocking the flow channel. The main structure of the limit block 7 is that four flow channels 72 with the same structural size are milled on the base 71 for medium circulation.

[0048] The adjusting gasket 8 is installed between the valve body 1 and the electric actuator 2. The thickness is adjusted by turning to ensure that the distance between the right end of the actuating rod 21 and the diaphragm 31 is (0.05-0.15) mm, which can avoid the collision between the actuating rod and the diaphragm during installation and ensure that the diaphragm can be completely broken.

[0049] The design structure proposed in this embodiment has undergone two electric explosion tests, one attitude control engine half system, and one full system test run assessment. The electric explosion, pressure resistance, flow resistance, air tightness and other indicators all meet the requirements. Including the electric explosion tube, the weight of the entire valve structure is only 25g. Because the electric explosion energy of the electric explosion tube is small, the components other than the diaphragm assembly and the electric explosion tube are intact and reusable after the electric explosion. Therefore, the present invention has the advantages of miniaturization, light weight and low cost.

[0050] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0051] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A diaphragm puncture type low-pressure normally closed electric explosion valve, characterized in that: It comprises a valve body (1), an electric actuator (2), a diaphragm assembly (3), a limit block (7), and an adjustment gasket (8); The valve body (1) is configured as a three-way structure, the left side of which is used for connecting the interface of the electric actuator (2), the right side of which is used for installing the diaphragm assembly (3), and the upper side of which is used for welding and connecting to an external tank structure; limit blocks (7) are provided on both sides of the connection position of the electric actuator (2) and the diaphragm assembly (3) to prevent the flow channel of the diaphragm assembly (3) from being blocked during the actuation of the electric actuator (2); an adjustment gasket (8) is installed at the setting gap between the valve body (1) and the electric actuator (2), and the axial spacing between the electric actuator (2) and the diaphragm assembly (3) is adjusted by adjusting the thickness of the gasket (8), so as to prevent the electric actuator (2) and the diaphragm assembly (3) from colliding with each other and ensure the success rate of the actuation process.

2. A diaphragm puncture type low-pressure normally closed electric explosion valve according to claim 1, characterized in that: The upper end face of the valve body (1) is welded to the end face of the storage tank, the left end face is welded to the adjusting gasket (8) for limiting the electric actuator (2), and the right end face is welded to the flange of the diaphragm assembly (3) for limiting the position. The left and right outer cylindrical surfaces of the valve body (1) are threaded, and the first outer sleeve nut (4) and the second outer sleeve nut (5) are arranged on both sides to respectively connect and fix the electric actuator (2) and the diaphragm assembly (3).

3. A diaphragm puncture type low-pressure normally closed electric explosion valve according to claim 2, characterized in that: The second outer sleeve nut (5) is connected to an external pipeline via a right-side thread to guide the internal medium of the point actuator (2) to flow out through the diaphragm assembly (3).

4. A diaphragm puncture type low-pressure normally closed electric explosion valve according to claim 2, characterized in that: The positive and negative wires (22) extend from the left end surface of the electric actuator (2), and an actuating rod (21) extends from the right end surface. After the positive and negative wires (22) are powered, the actuating rod (21) extends to the right to pierce the diaphragm of the diaphragm assembly (3).

5. A diaphragm puncture type low-pressure normally closed electric explosion valve according to claim 4, characterized in that: The diaphragm assembly (3) comprises a diaphragm (31) and a pipe nozzle (32). The diaphragm (31) and the pipe nozzle (32) are welded together. The actuating rod (21) is limited by a limit block (7) before actuation and punctures the diaphragm (31) after actuation. The diaphragm (31) is arranged on the inner side of the pipe nozzle (32).

6. A diaphragm puncture type low-pressure normally closed electric explosion valve according to claim 4, characterized in that: The diaphragm (31) is provided with an Ω-shaped notch (311) by laser etching technology, the remaining thickness of the Ω-shaped notch (311) is no greater than 1 / 2 of the overall thickness of the diaphragm assembly (3) and no less than a preset thickness, and the inner portion of the Ω-shaped notch (311) is driven by the axial force generated when the actuating rod (21) is in motion to flip backwards to open a medium passage behind the diaphragm (31).

7. A diaphragm puncture type low-pressure normally closed electric explosion valve according to claim 4, characterized in that: It also includes an O-shaped rubber sealing ring (6) which is installed in the rubber ring grooves of the valve body (1), the nozzle (32) and the outer sleeve nut (5) to prevent leakage of the medium.

8. The diaphragm puncture type low-pressure normally closed electric explosion valve according to claim 1, characterized in that: The limit block (7) comprises a base (71) and a flow channel (72). The base (71) is milled with four flow channels (72) of the same structural size for medium circulation. After the diaphragm (31) is punctured, the liquid medium flows into the diaphragm assembly (3) from the storage tank structure connected to the upper end surface of the valve body (1) and flows out through the punctured diaphragm (31).

9. A diaphragm puncture type low-pressure normally closed electric explosion valve according to claim 4, characterized in that: The adjusting gasket (8) is installed between the valve body (1) and the electric actuator (2), and its thickness is adjusted by turning to ensure that the distance between the right end of the actuating rod (21) and the diaphragm (31) is 0.05-0.15 mm, so as to avoid the right end of the actuating rod (21) colliding with the diaphragm (31) during the installation process and ensure that the diaphragm (31) is completely broken during the actuation process.

10. A control method for a diaphragm puncture type low-pressure normally closed electric explosion valve according to claim 1, characterized in that include: An external power source is connected to the left side of the valve body (1), a diaphragm assembly (3) is installed through the right side of the valve body (1), and an external tank structure is welded to the end surface of the upper side of the valve body (1); The thickness of the adjusting gasket (8) is preset to ensure that the distance between the right end of the actuating rod (21) and the diaphragm (31) is maintained within a preset range; a limit block (7) is provided to prevent the actuating rod (21) from extending to the right, thereby driving the end surface of the actuator (2) housing to move rightward and block the flow channel; The electric actuator (2) is started by connecting electricity through the positive and negative wires (22). After the electricity is connected, the actuating rod (21) moves to extend to the right to pierce the diaphragm (31) of the diaphragm assembly (3), and the medium flows out from the diaphragm assembly (3).

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