Anti-rebound high pressure electric detonation valve

Abstract

The anti-rebound high-pressure electric explosion valve comprises a shell, a cutter, a pin lock, a sealing seat, a spring seat, a unloading valve core, a small spring, a steel ball, a pin lock rod and a large spring; the cutter is arranged in the inner cavity of the shell; the sealing seat, the pin lock rod and the large spring are sequentially arranged in the cutter, the sealing seat is connected with the tapered end of the cutter through external threads, one end of the pin lock rod is inserted into the sealing seat, the other end of the pin lock rod is connected with one end of the large spring, and the other end of the large spring is connected with the cutter; the cutter is provided with a locking groove, the steel ball and the pin lock are arranged in the locking groove, the steel ball is in contact with the pin lock rod, and the pin lock is pressed on the steel ball; the unloading valve core is arranged in the sealing seat, the small spring is fixedly connected to the spring seat, the small spring is sleeved on the unloading valve core, and the spring seat is connected with the sealing seat; and the inner cavity side wall of the shell is provided with a pin lock groove. The anti-rebound high-pressure electric explosion valve has a pin lock structure, can be directly locked by using the action force of high-pressure medium, and can effectively prevent the cutter from rebounding under the action of high pressure after explosion.

Description

Technical Field

[0001] This invention relates to the field of fluid control in aerospace pressurized delivery systems, and specifically to a high-pressure electric explosion-proof valve that prevents rebound. Background Technology

[0002] Electric explosion valves, as a type of single-unit device characterized by fast response, low cost, simple principle, easy control, good sealing performance, and relatively stable operation, are widely used in the gas or liquid circuits of pressurized delivery systems in liquid rockets, satellites, space probes, and manned spacecraft. The performance and reliability of electric explosion valves directly affect the operation of the entire system and even the success or failure of the mission. Traditional electric explosion valves are often used in low- to medium-pressure environments where the pressure exerts little force on moving parts such as the cutter. They often employ conical or wedge-shaped structures to prevent rebound after detonation. The selection of the cone angle of this conical or wedge structure directly affects the magnitude of the locking force after detonation. In high-pressure environments, the force exerted by the high-pressure medium on the cutter is significant, posing a challenge to the setting of the cone angle. Often, numerous angle combinations are tested or simulated, wasting considerable time and cost. Therefore, there is an urgent need for a reliable anti-rebound high-pressure electric explosion valve for high-pressure environments.

[0003] Chinese invention patent application CN114992365A discloses a high-pressure unloading type normally closed electric explosion valve. The valve's structure uses a cone angle on the cutter that matches a cone angle on the housing to lock the cutter after detonation. The cutter cap and housing are machined as a single unit, which is difficult to manufacture, and based on the attached drawings, the structure is practically impossible to implement. The valve uses flow channels with through-holes machined on the cutter to allow for media flow after detonation; however, improper placement of these through-holes may cause throttling during actual implementation.

[0004] Chinese invention patent ZL201210463010.X discloses a wedge-type anti-rebound electric explosion valve. This electric explosion valve uses a cone angle on the rod to cooperate with a cone angle on the housing to achieve locking after the rod breaks off after the electric explosion valve is detonated. The cutting method in this electric explosion valve is pull-off. Summary of the Invention

[0005] The purpose of this invention is to provide a high-pressure electric explosion valve with a pin-lock structure, which directly utilizes the force of the high-pressure medium to achieve locking, effectively preventing the cutter from rebounding under high pressure after detonation.

[0006] To achieve the above objectives, the present invention provides a high-pressure electric explosion-proof valve with anti-rebound capability, comprising a housing, a cutter, a pin lock, a sealing seat, a spring seat, an unloading valve core, a small spring, a steel ball, a pin lock rod, and a large spring; one end of the inner cavity of the housing is designed to be tapered; one end of the cutter is designed to be tapered, and the cutter is placed in the inner cavity of the housing; the sealing seat, the pin lock rod, and the large spring are sequentially arranged inside the cutter, the sealing seat is threadedly connected to the tapered end of the cutter via an external thread, and one end of the pin lock rod is inserted into the... Inside the sealing seat, the other end of the locking rod is connected to one end of the large spring, and the other end of the large spring is connected to the cutter; the cutter is provided with a locking groove, the steel ball and the locking pin are placed in the locking groove, the steel ball is in contact with the locking rod, and the locking pin is pressed on the steel ball; the unloading valve core is disposed inside the sealing seat, the small spring is fixed to the spring seat, the small spring is sleeved on the unloading valve core, and the spring seat is connected to the sealing seat; a locking groove is provided on the inner wall of the housing cavity.

[0007] The aforementioned anti-rebound high-voltage electric explosion valve further includes a cutter cap and a connecting nozzle; the cutter cap is disposed on the inlet side of the housing, the connecting nozzle is connected to the inlet side of the housing, the cutter has a drop groove, the weak end of the cutter cap is placed in the drop groove, and the weak end of the cutter cap and the drop groove are clearance-fitted; the cutter cap has a venting cavity, one end of which is open and the other end is closed, the open end of the venting cavity communicates with the connecting nozzle, and the closed end of the venting cavity extends into the weak end of the cutter cap; the cutter has a small cylindrical section whose outer diameter is smaller than that of the other sections of the cutter, forming a flow channel between the outer diameter of the small cylindrical section and the inner cavity of the housing; the cutter has a vent hole.

[0008] In the aforementioned anti-rebound high-pressure electric explosion valve, a slanted cut is made on the outer wall of one end of the cut cap. This slanted cut is the weak point of the cut cap, and this end is defined as the weak end of the cut cap. The slant angle of the slanted cut is 30° to 60°.

[0009] The aforementioned anti-rebound high-pressure electric explosion valve further includes a threaded adapter and a partition igniter; one end of the housing is connected to the partition igniter via the threaded adapter; the cavity between the non-conical end of the cutter and the threaded adapter is an explosion cavity.

[0010] In the aforementioned anti-rebound high-pressure electric explosion valve, before the diaphragm igniter, the weak end of the cutter cap is not cut off, and the vent chamber of the cutter cap is a closed chamber, preventing the high-pressure medium in the isolation connector from entering the flow channel in the inner cavity of the housing; the tapered end of the locking rod does not enter the tapered end of the inner cavity of the housing; the locking pin and the steel ball are squeezed between the inner cavity of the housing and the locking rod, the locking pin and the locking groove are misaligned, and the locking rod and the steel ball are tightly fitted; after the diaphragm igniter is powered on, high-temperature and high-pressure gas is generated, which pushes the cutter towards the tapered end. The movement of the cutter cuts off the weak position of the cutter cap, and the closed end of the vent chamber is cut off. When the valve is cracked, the high-pressure medium in the nozzle acts on the upper end of the locking rod through the vent hole on the cutter. Under high pressure, the locking rod moves, squeezing the steel ball and pushing the locking pin outward. The locking pin is pushed out and locked into the locking groove on the inner cavity of the housing, thus preventing the cutter from rebounding under high pressure after the high-pressure electric explosion valve is detonated. The tapered end of the cutter enters the tapered end of the inner cavity of the housing, forming a hard seal. The spring seat is provided with an exhaust hole. During the movement of the locking rod, the air at one end is unloaded through the unloading valve core. After unloading, the unloading valve core achieves a seal under the compression force of the small spring.

[0011] The aforementioned anti-rebound high-pressure electric explosion valve further includes a filter assembly and a screw plug; the filter assembly is positioned at the other end of the housing via the screw plug.

[0012] In the aforementioned anti-rebound high-pressure electric explosion valve, when the threaded adapter is connected to the housing via an external thread, the front end of the threaded adapter is inserted into the inner cavity of the housing, and the size of the explosion chamber can be adjusted by adjusting the axial length of the front end of the threaded adapter.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are:

[0014] 1) It has a pin-lock structure (pin lock + steel ball), which directly uses the force of the high-pressure medium to achieve locking, without the need for other forces such as springs, and the locking is reliable;

[0015] 2) The size of the explosion chamber can be adjusted by selecting the axial length of the front end of the threaded adapter;

[0016] 3) A through hole is provided on the housing to communicate with the outside, which can effectively reduce the influence of the air pressure in the detonation compression chamber on the movement of the cutter after detonation; and a filter assembly is installed in the through hole to reduce the influence of external foreign matter on the function of the electric detonation valve.

[0017] 4) The compressed gas in the pin locking rod cavity of the sealing seat is unloaded through the unloading valve core, and after unloading, it achieves sealing under the action of a small spring.

[0018] 5) After the pin lock rod is tightened, it seals with the sealing seat stop. The seal is achieved by the force of the high-pressure medium, and the seal is reliable. Attached Figure Description

[0019] The anti-rebound high-pressure electric explosion valve of the present invention is given by the following embodiments and figures.

[0020] Figure 1 This is a three-dimensional structural diagram of the anti-rebound high-pressure electric explosion valve according to a preferred embodiment of the present invention.

[0021] Figure 2 This is a cross-sectional view of the anti-rebound high-pressure electric explosion valve according to a preferred embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the cutting blade structure in a preferred embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the cap structure in a preferred embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the threaded adapter structure in a preferred embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the combination of the pin lock and the steel ball in a preferred embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the pin locking rod structure in a preferred embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of the unloading valve core structure in a preferred embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of the sealing seat structure in a preferred embodiment of the present invention. Detailed Implementation

[0029] The following will combine Figures 1-9 The anti-rebound high-pressure electric explosion valve of the present invention will be described in further detail.

[0030] The anti-rebound high-pressure electric explosion valve of the present invention is installed at the outlet of the high-pressure gas cylinder or storage tank in the aerospace pressurization and delivery system, and the inlet side of the electric explosion valve is connected to the outlet of the high-pressure gas cylinder or storage tank.

[0031] Figure 1 The figure shown is a three-dimensional structural diagram of the anti-rebound high-pressure electric explosion valve according to a preferred embodiment of the present invention; Figure 2 The figure shown is a cross-sectional view of the anti-rebound high-pressure electric explosion valve according to a preferred embodiment of the present invention. Figure 3 The diagram shown is a schematic diagram of the cutter structure in a preferred embodiment of the present invention.

[0032] See Figures 1 to 3The anti-rebound high-pressure electric explosion valve of this embodiment includes a filter assembly 1, a housing 2, a cutter 3, a threaded adapter 5, a cutter cap 8, a connecting pipe 12, a pin lock 13, a sealing seat 14, a screw plug 15, a spring seat 16, an unloading valve core 17, a small spring 18, a steel ball 20, a pin lock rod 21, a large spring 22, and a partition igniter 23.

[0033] One end of the housing 2 is connected to the partition igniter 23 via the threaded adapter 5, and the filter assembly 1 is positioned at the other end of the housing 2 via the screw plug 15; a gasket 4 is provided between the threaded adapter 5 and the housing 2;

[0034] The inner cavity of the housing 2 is designed to be tapered at the end near the filter assembly 1, with a tapered angle of 15° to 25°.

[0035] One end of the cutter 3 is designed to be tapered, with the tapered angle being slightly larger than the tapered angle of the inner cavity of the housing 2. The cutter 3 is placed in the inner cavity of the housing 2, and the tapered end 301 of the cutter 3 faces the filter assembly 1. The cavity between the other end of the cutter 3 and the threaded adapter 5 is an explosion cavity A.

[0036] The cut cap 8 is disposed on the inlet side of the housing 2. The connecting nozzle 12 is connected to the inlet side of the housing 2. An O-ring 10 and a retaining ring 11 are provided between the connecting nozzle 12 and the inlet side of the housing 2. That is, the connecting nozzle 12 and the housing 2 adopt a radial seal of "O-ring + retaining ring". The connecting nozzle 12 is used to connect to the outlet of the high-pressure gas cylinder or storage tank of the aerospace pressurization and delivery system. The connecting nozzle 12 is placed on the cut cap 8, and a gasket 9 is provided between the connecting nozzle 12 and the cut cap 8.

[0037] The cutter 3 is provided with a drop groove 302. Before the partition igniter 23 ignites and detonates, the weak end of the cutter cap 8 is placed in the drop groove 302. The weak end of the cutter cap 8 and the drop groove 302 are in clearance fit, with a clearance distance of 0.1mm to 0.3mm.

[0038] The sealing seat 14, the locking pin 21, and the large spring 22 are sequentially arranged inside the cutter 3. The sealing seat 14 is threaded to the tapered end of the cutter 3 via an external thread. One end of the locking pin 21 is inserted into the sealing seat 14, and the other end of the locking pin 21 is connected to one end of the large spring 22. The other end of the large spring 22 is connected to the cutter 3. An O-ring 19 is provided between the locking pin 21 and the cutter 3.

[0039] The cutter 3 is provided with a locking groove 303, the steel ball 20 and the pin lock 13 are placed in the locking groove 303, the steel ball 20 is in contact with the pin lock rod 21, and the pin lock 13 presses on the steel ball 20;

[0040] The unloading valve core 17 is disposed in the sealing seat 14, the small spring 18 is fixedly connected to the spring seat 16, the small spring 18 is sleeved on the unloading valve core 17, and the spring seat 16 is connected to the sealing seat 14.

[0041] The inner wall of the housing 2 is provided with a locking groove 201.

[0042] like Figure 3 The cutter 3 has a small cylindrical section 304, the outer diameter of which is smaller than the other sections of the cutter 3. A flow channel B is formed between the outer diameter of this small cylindrical section 304 and the inner cavity of the housing 2, such as... Figure 1 The cutter 3 is also provided with several sealing grooves 305, and O-rings 7 and retaining rings 6 are provided in the sealing grooves 305; the tapered end of the cutter 3 is provided with a sealing seat mounting hole, and a pin locking rod mounting cavity and a vent hole 306 are opened in the cutter 3. One end of the pin locking rod mounting cavity is connected to the sealing seat mounting hole, the locking groove 303 is connected to the pin locking rod mounting cavity, and the vent hole 306 is connected to the pin locking rod mounting cavity. The sealing seat 14 is fastened to the sealing seat mounting hole by external threads, and the pin locking rod 21 is placed in the pin locking rod mounting cavity. One end of the pin locking rod 21 is inserted into the sealing seat 14.

[0043] like Figure 2 The housing 2 has a threaded adapter mounting hole at one end and a screw plug mounting hole at the other end. The inner cavity of the housing 2 communicates with the threaded adapter mounting hole and the screw plug mounting hole at both ends, respectively. The end of the inner cavity of the housing 2 communicating with the screw plug mounting hole is designed to be tapered. The filter assembly 1 is placed inside the screw plug mounting hole, and the screw plug 15 is fastened to the screw plug mounting hole by external threads to achieve positioning of the filter assembly 1. The housing 2 has an inlet side and an outlet side, both of which communicate with the inner cavity of the housing 2. A pair of lugs are also provided on the outer wall of the housing 2 for mounting the anti-rebound high-pressure electric explosion valve.

[0044] Figure 4 The diagram shown is a schematic diagram of the cap structure in a preferred embodiment of the present invention.

[0045] like Figure 4 The cut cap 8 has a beveled cut 802 on its outer side wall at one end. The bevel angle of the beveled cut 802 is 30° to 60° (preferably 30°). The beveled cut 802 is the weak point of the cut cap, and this end is defined as the weak end of the cut cap. The other end of the cut cap is connected to the connector 12. The cut cap has a venting cavity 801. One end of the venting cavity 801 is open and the other end is closed. The open end of the venting cavity 801 communicates with the through hole in the connector 12. The closed end of the venting cavity 801 extends into the weak end of the cut cap. When the cut cap breaks along the fracture surface 803, the closed end of the venting cavity 801 breaks.

[0046] Figure 5 The diagram shown is a schematic diagram of the threaded adapter structure in a preferred embodiment of the present invention.

[0047] like Figure 5 The threaded adapter 5 is provided with a through hole 501, one end of which is provided with an internal thread for connecting the partition igniter 23. When the threaded adapter 5 is connected to the threaded adapter mounting hole of the housing 2 through the external thread, the front end of the threaded adapter 5 is inserted into the inner cavity of the housing 2. The size of the explosion cavity A can be adjusted by adjusting the axial length L of the front end of the threaded adapter 5.

[0048] Figure 6 The diagram shown is a schematic representation of the combination of the pin lock and the steel ball in a preferred embodiment of the present invention.

[0049] Figure 7 The diagram shown is a schematic diagram of the pin locking rod structure in a preferred embodiment of the present invention.

[0050] like Figure 7 The outer wall of the locking pin 21 is provided with a groove 211, the curved surface of which is tangent to the arc surface of the steel ball 20.

[0051] Figure 8 The diagram shown is a schematic diagram of the unloading valve core structure in a preferred embodiment of the present invention.

[0052] like Figure 8 The unloading valve core 17 includes a spherical head 171 and a cylindrical section 172.

[0053] Figure 9 The diagram shown is a schematic diagram of the sealing seat structure in a preferred embodiment of the present invention.

[0054] The sealing seat 14 is provided with a pin locking rod cavity 141, a through hole 143, and an unloading valve core cavity 142. One end of the through hole 143 communicates with the pin locking rod cavity 141, and the other end of the through hole 143 communicates with the unloading valve core cavity 142. That is, the pin locking rod cavity 141 and the unloading valve core cavity 142 are connected through the through hole 143. Figure 2 One end of the locking rod 21 is inserted into the locking rod cavity 141; the unloading valve core 17 is placed in the unloading valve core cavity 142, the spherical head 171 of the unloading valve core 17 faces the locking rod 21, and the small spring 18 is sleeved on the cylindrical section 172 of the unloading valve core 17.

[0055] See Figures 2 to 9Before the igniter 23 is ignited, the weak end of the cutter cap 8 is not cut off, and the vent chamber 801 of the cutter cap 8 is a closed chamber. The high-pressure medium in the isolation pipe nozzle 12 enters the flow channel B in the inner cavity of the housing 2. The tapered end of the locking rod 21 does not enter the tapered end of the inner cavity of the housing 2. At this time, the tapered end of the inner cavity of the housing 2 constitutes the detonation compression chamber. The locking groove 303 of the cutter 3 is directly opposite the groove 211 of the locking rod 21. The locking pin 13 and the steel ball 20 are squeezed between the inner cavity of the housing 2 and the locking rod 21 (the locking pin 13 and the locking groove 201 are misaligned). The locking rod 21 and the steel ball 20 are tightly fitted.

[0056] After the partition igniter 23 is energized and ignited, it generates high-temperature and high-pressure gas, which acts on the explosion chamber A, pushing the cutter 3 to the right (i.e., towards the conical end). The movement of the cutter 3 cuts through the weak point of the cutting cap 8, and the weak end of the cutting cap 8 breaks off and falls into the drop groove 302 of the cutter 3. The closed end of the vent chamber 801 breaks off, and the high-pressure medium in the connector nozzle 12 acts on the upper end face of the locking rod 21 through the vent hole 306 on the cutter 3. The locking rod 21 moves under high pressure, squeezing the steel Ball 20 pushes pin 13 to move outward, and pin 13 is pushed out and locked into pin lock groove 201 on the inner cavity of housing 2, thereby realizing the anti-rebound of cutter 3 under high pressure after the high-pressure electric explosion valve is detonated; the conical end of cutter 3 enters the conical end of the inner cavity of housing 2 to form a hard seal; three exhaust holes are provided on spring seat 16, and the air at one end of the pin lock rod is unloaded through unloading valve core 17 during the movement of the pin lock rod. After unloading, unloading valve core 17 achieves sealing under the compression force of small spring 18;

[0057] After the weak end of the cap 8 breaks, the flow channel B in the inner cavity of the shell 2 is connected to the nozzle 12 through the venting cavity 801, thereby realizing the connection between the outlet of the high-pressure gas cylinder and the outlet side of the shell 2 (that is, realizing the connection between the outlet of the high-pressure gas cylinder and the downstream pipeline).

[0058] The high-pressure electric explosion valve of the present invention is an electric explosion valve with a pressure greater than 10MPa. Preferably, the high-pressure electric explosion valve has a working pressure of 35MPa and a nominal diameter of 6mm.

Claims

1. A rebound-proof high-pressure electric explosion valve, characterized in that, Includes housing, cutter, pin lock, sealing seat, spring seat, unloading valve core, small spring, steel ball, pin lock rod and large spring; One end of the inner cavity of the shell is designed to be tapered; One end of the cutter is designed to be tapered, and the cutter is placed inside the cavity of the housing; The sealing seat, the locking pin, and the large spring are sequentially arranged inside the cutter. The sealing seat is threaded to the tapered end of the cutter via an external thread. One end of the locking pin is inserted into the sealing seat, and the other end of the locking pin is connected to one end of the large spring. The other end of the large spring is connected to the cutter. The cutter is provided with a locking groove, the steel ball and the pin are placed in the locking groove, the steel ball is in contact with the pin rod, and the pin presses on the steel ball; The unloading valve core is disposed in the sealing seat, the small spring is fixed to the spring seat, the small spring is sleeved on the unloading valve core, and the spring seat is connected to the sealing seat; The inner wall of the housing is provided with a locking groove; The anti-rebound high-voltage electric explosion valve also includes a cutter cap and a connecting nozzle; the cutter cap is disposed on the inlet side of the housing, the connecting nozzle is connected to the inlet side of the housing, the cutter has a drop groove, the weak end of the cutter cap is placed in the drop groove, and the weak end of the cutter cap and the drop groove are clearance-fitted; the cutter cap has a venting cavity, one end of which is open and the other end is closed, the open end of the venting cavity communicates with the connecting nozzle, and the closed end of the venting cavity extends into the weak end of the cutter cap; the cutter has a small cylindrical section, the outer diameter of which is smaller than the other sections of the cutter, forming a flow channel between the outer diameter of the small cylindrical section and the inner cavity of the housing; the cutter has a vent hole. A slanted cut is made on the outer wall of one end of the cut cap. This slanted cut is the weak point of the cut cap. One end of the cut cap is defined as the weak end of the cut cap. The slant angle of the slanted cut is 30°~60°.

2. The anti-rebound high-pressure electric explosion valve as described in claim 1, characterized in that, The anti-rebound high-voltage electric explosion valve also includes a threaded adapter and a partition igniter; one end of the housing is connected to the partition igniter through the threaded adapter; the cavity between the non-conical end of the cutter and the threaded adapter is an explosion cavity.

3. The anti-rebound high-pressure electric explosion valve as described in claim 2, characterized in that, Before the igniter is ignited, the weak end of the cut cap is not cut off, the venting chamber of the cut cap is a closed chamber, and the high pressure medium in the isolation pipe nozzle enters the flow channel in the inner cavity of the housing; the tapered end of the locking rod does not enter the tapered end of the inner cavity of the housing; the locking pin and the steel ball are squeezed between the inner cavity of the housing and the locking rod, the locking pin and the locking groove are misaligned, and the locking rod and the steel ball are tightly fitted. After the partition igniter is powered on, it generates high-temperature and high-pressure gas, which pushes the cutter towards the conical end. The movement of the cutter cuts the weak point of the cutter cap, and the closed end of the vent chamber breaks. The high-pressure medium in the connector nozzle acts on the upper end face of the locking pin through the vent hole on the cutter. The locking pin moves under high pressure, squeezing the steel ball and pushing the locking pin outward. The locking pin is pushed out and locked into the locking groove on the inner cavity of the housing, thus realizing the anti-rebound of the cutter under high pressure after the high-pressure electric explosion valve is detonated. The tapered end of the cutter enters the tapered end of the housing cavity, forming a hard seal; the spring seat is provided with an exhaust hole, and during the movement of the pin locking rod, the air at one end is unloaded through the unloading valve core, and after unloading, the unloading valve core achieves sealing under the compression force of the small spring.

4. The anti-rebound high-pressure electric explosion valve as described in claim 2, characterized in that, The anti-rebound high-pressure electric explosion valve also includes a filter assembly and a screw plug; the filter assembly is positioned at the other end of the housing via the screw plug.

5. The anti-rebound high-pressure electric explosion valve as described in claim 2, characterized in that, When the threaded adapter is connected to the housing via an external thread, the front end of the threaded adapter is inserted into the inner cavity of the housing, and the size of the explosion cavity can be adjusted by adjusting the axial length of the front end of the threaded adapter.

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