A cylinder-driven closed-lift wedge tight self-locking mechanism

Abstract

The application provides a cylinder-driven closed gas rod wedge locking self-locking mechanism. The wedge locking self-locking mechanism comprises a cylinder, a wedge block, a pressing block and a closed gas rod, the closed gas rod is formed in extension along a horizontal direction, the wedge block is formed in extension along a vertical direction, the end of the closed gas rod is matched with an opening of a combustion chamber for opening and closing the opening, the head of the closed gas rod is connected with the pressing block, the piston rod of the cylinder is connected with the top surface outer wall of the wedge block, one side surface of the wedge block is a first inclined surface, the side surface of the pressing block facing the wedge block is a second inclined surface, and the first inclined surface is matched with the second inclined surface. The cylinder serves as a driving source, relies on the mutual pressing of the wedge block and the pressing block, and is linked with the closed gas rod to convert the vertical direction force into the horizontal direction force, so that the opening and closing locking function of the combustion chamber is realized. Through the limiting action of the two side walls of the U-shaped fork on the pressing block and the limiting locking action of the screw cylinder on the U-shaped fork, the closed gas rod can be more accurately controlled, and the sealing performance and the use safety are ensured.

Description

Technical Field

[0001] This invention relates to the field of launch test equipment, and more specifically, to a cylinder-driven air-closing rod wedge self-locking mechanism. Background Technology

[0002] Hypervelocity launch test devices, which use the expansion of compressed light gas to drive a piston / projectile, are widely used in research fields such as dynamic material properties, high-speed space debris impacts, and spacecraft protection. During the test, a high-pressure fuel-gas mixture is first injected into the combustion chamber through the fuel loading system. After ignition by the ignition system, a high-temperature, high-pressure gas of hundreds of megapascals is instantly formed in the combustion chamber, propelling the piston / projectile. In existing hypervelocity test devices, the interface between the combustion chamber and the fuel loading system is a critical component. When fuel loading is complete, residual gas mixture in the loading pipeline cannot be released. During the test, the pressure in the combustion chamber after ignition is much higher than the pressure in the loading pipeline, requiring the interface component to withstand a forward pressure difference. During the after-effect period when the piston / projectile is driven to the outlet, the pressure in the combustion chamber is instantly depressurized to atmospheric pressure. At this point, the pressure in the combustion chamber is lower than the pressure in the loading pipeline, requiring the interface component to withstand a reverse pressure difference. The interface component must maintain a reliable seal under both forward and reverse pressure differences to ensure safety during ignition and the after-effect period of the hypervelocity test.

[0003] Traditional backflow prevention measures include the use of check valves and shut-off valves. However, in ultra-high-speed testing equipment, the transient and intense impact process under high temperature and high pressure can cause valve core erosion, damage, and functional failure.

[0004] Another measure is to design a safety locking control mechanism. Typically, the filling pipeline is filled with high-pressure fuel gas. For safety reasons, the valves and mechanisms of the entire system are powered by an inert gas drive source. The safety locking control mechanism generally uses a cylinder-type locking mechanism. However, because the compressed air in the working medium inside the cylinder is compressible, it is difficult to keep the cylinder piston rod in a fixed position. At the moment a reverse pressure difference is generated in the combustion chamber, the piston rod movement can cause the sealing surface to loosen, creating gaps. The flame in the combustion chamber can then propagate into the pipeline through these gaps, causing a high-pressure gas explosion and resulting in a safety accident. Based on this, the cylinder can be replaced with a cylinder with a locking function, but two problems still exist. First, it is difficult to adjust the cylinder piston rod locking position precisely; second, during ignition and combustion, the sealing rod bears high chamber pressure and is pressed backward and locked by the positive pressure difference. When the combustion chamber depressurizes to the point where a reverse pressure difference occurs, it will still move forward and return to its original position. To ensure the safety of ultra-high-speed testing, the sealing and locking failure problems of the interface components must be solved. Summary of the Invention

[0005] In view of this, the present invention aims to provide a cylinder-driven air-locking rod wedge self-locking mechanism to solve the problems in the prior art that it is impossible to maintain a reliable seal under both forward and reverse pressure differences, and that it is difficult to lock during sealing.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] This invention proposes a cylinder-driven self-locking mechanism for sealing and opening a combustion chamber. The mechanism includes a cylinder, a wedge, a pressing block, and a sealing rod. The sealing rod extends horizontally and is at least partially located within a pipe. The wedge extends vertically. The end of the sealing rod engages with the opening of the combustion chamber to open or close the opening. The head of the sealing rod is connected to the pressing block. The piston rod of the cylinder is connected to the outer wall of the top surface of the wedge. One side of the wedge is a first inclined surface, and the side of the pressing block facing the wedge is a second inclined surface. The first and second inclined surfaces engage with each other.

[0008] Optionally, the wedge is a U-shaped fork, with a second sidewall and a first sidewall connected to the front and rear sides of the groove bottom of the U-shaped fork, respectively. The first sidewall is provided with a first inclined surface, the second sidewall is provided with a first inclined surface, and the clamping block is provided with a second inclined surface on both the front and rear sides facing the end of the U-shaped fork.

[0009] Optionally, a connecting frame is provided on the side of the pipe facing the clamping block. The connecting frame connects the cylinder mounting seat and the support. The cylinder is connected to the connecting frame through the cylinder mounting seat. The support is provided with a linear guide rail. The clamping block is slidably connected to the linear guide rail.

[0010] Optionally, the wedge-locking mechanism further includes a fixed slide and a screw cylinder. The fixed slide is disposed between the cylinder mounting seat and the U-shaped fork and is connected to the connecting frame. The first end of the screw cylinder is connected to the piston rod of the cylinder, and the second end passes through the fixed slide and is connected to the top outer wall of the U-shaped fork. The screw cylinder has a protrusion between its first end and the fixed slide, and the screw cylinder can move in the vertical direction within the fixed slide.

[0011] Optionally, a sleeve and a bolt are provided at the slot of the U-shaped fork. The front and rear sides of the sleeve pass through the two sides of the slot and are tightened with bolts to connect the sleeve to the slot of the U-shaped fork. The bolt and the sleeve form a blocking part at the slot.

[0012] Optionally, the wedge-tightening self-locking mechanism includes a hollow screw plug ring. The first end of the screw plug ring passes through the connecting frame and cooperates with the air-locking rod to seal the first side opening of the pipeline. The second end of the screw plug ring abuts against the right side of the connecting frame. The first end of the air-locking rod passes through the screw plug ring and is connected to the clamping block through a pin.

[0013] Optionally, the cylinder, U-shaped fork, clamping block, and air-closing rod are each provided in two sets, and are distributed vertically, wherein the clamping block and air-closing rod of the upper set and the clamping block and air-closing rod of the lower set are located at the same height.

[0014] Optionally, the end of the air-sealing rod is a tapered structure, and the end of the air-sealing rod is sealed with the tapered surface of the opening groove of the combustion chamber.

[0015] Optionally, the pipe has a spline structure.

[0016] Optionally, the first end of the air-sealing rod has a through hole, the first end of the air-sealing rod extends into the clamping block, the pin passes through the through hole and extends out of the through hole on both its upper and lower sides, and abuts against the inner wall surface of the clamping block, thereby achieving the connection between the clamping block and the air-sealing rod.

[0017] Compared with the prior art, the cylinder-driven air-locking rod wedge self-locking mechanism of the present invention has the following advantages:

[0018] (1) The cylinder serves as a driving source. It relies on the mutual cooperation between the wedge and the pressing block to press it, and is linked with the air-closing rod to convert the vertical force into the horizontal force, thereby realizing the opening and closing function of the combustion chamber and achieving the effects of filling and sealing.

[0019] (2) Under the action of reverse pressure difference, when the air-sealing rod drives the pressing block to move toward the combustion chamber, the U-shaped fork structure design can limit the degree of horizontal movement. When the pressing block contacts the two side walls, it cannot continue to move toward the combustion chamber and reaches the termination position, preventing the air-sealing rod from automatically sliding toward the combustion chamber side when subjected to reverse pressure difference, which would cause the sealed combustion chamber opening to be opened.

[0020] (3) The protrusion can limit the vertical movement of the U-shaped fork, so that the U-shaped fork will not press the pressing block indefinitely, thus avoiding the end of the air-sealing rod being completely pulled out of the combustion chamber after the sealing is completed.

[0021] (4) The cylinder, U-shaped fork, clamping block and air-closing rod are all provided in two sets and are distributed vertically. The clamping block and air-closing rod of the upper set and the clamping block and air-closing rod of the lower set are located at the same height, which is also conducive to the compactness of the structure and reduces the space occupied. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a front view of the wedge-locking self-locking mechanism described in this invention;

[0024] Figure 2 for Figure 1 A sectional view;

[0025] Figure 3 This is a schematic diagram of the structure of the cylinder, U-shaped fork, and clamping block described in this invention;

[0026] Figure 4 For Figure 3 Side view;

[0027] Figure 5 This is a schematic diagram of the U-shaped fork described in this invention;

[0028] Figure 6 This is a schematic diagram of the structure of the clamping block described in this invention;

[0029] Figure 7 This is a schematic diagram of the screw plug ring and filling channel described in this invention;

[0030] Figure 8 This is a cross-sectional view of the pipe described in this invention;

[0031] Figure 9 This is a schematic diagram of the launch test device described in this invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Cylinder; 2. Cylinder mounting base; 3. Screw barrel; 31. Protrusion; 4. Fixed slide; 5. U-shaped fork; 51. First side wall; 52. Second side wall; 53. Groove bottom; 6. Clamping block; 7. Linear guide rail; 8. Support; 9. Air shut-off rod; 10. Pin; 11. Plug ring; 12. Bolt; 13. Sleeve; 14. Filling channel; 15. Combustion chamber; 16. Pipe; 17. Connecting bracket. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In addition, the orientations involved in the following specific embodiments are briefly explained: the directions or positional relationships indicated by "front", "rear", "up", "down", "left", "right", "top", "bottom", etc. mentioned in the embodiments refer to the orientations or positional relationships shown in the accompanying drawings, and the term "on" means directly or indirectly supported by the element.

[0035] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] like Figure 1-4 As shown, a cylinder-driven air-locking rod wedge self-locking mechanism is used to seal and open a combustion chamber 15. It includes a cylinder 1, a wedge, a pressing block 6, and an air-locking rod 9. The air-locking rod 9 extends horizontally and is at least partially located within a pipe 16. The wedge extends vertically. The end of the air-locking rod 9 engages with the opening of the combustion chamber 15 to open or close the opening. The head of the air-locking rod 9 is connected to the pressing block 6. The piston rod of the cylinder 1 is connected to the outer wall of the top surface of the wedge. One side of the wedge is a first inclined surface, and the side of the pressing block 6 facing the wedge is a second inclined surface. The first inclined surface and the second inclined surface engage.

[0037] The cylinder 1, acting as a drive source, relies on the cooperation of the wedge and the clamping block 6 to press the cylinder in place, and is linked with the air-sealing rod 9 to convert the vertical force into a horizontal force, thereby realizing the opening and closing function of the combustion chamber 15, achieving both filling and sealing isolation effects. Specifically, the cylinder 1 can be electrically connected to the control system to automatically control its retraction or extension.

[0038] When fuel needs to be added to the combustion chamber 15, the control cylinder 1 retracts and moves the wedge block to separate from the clamping block 6. Relying on the gas pressure in the pipeline 16 during fuel addition, the air-closing rod 9 is pushed up and moved toward the combustion chamber 15, thereby opening the opening of the combustion chamber 15 for fuel addition.

[0039] After refueling is completed, the control cylinder 1 extends and pushes the wedge towards the clamping block 6. The first inclined surface presses against and holds the second inclined surface, causing the clamping block 6, along with the air-sealing rod 9, to move horizontally away from the combustion chamber 15 until the end of the air-sealing rod 9 is tightly fitted against the inner wall of the opening of the combustion chamber 15, thereby closing and sealing the opening of the combustion chamber 15. At this point, the wedge and the clamping block 6 are fully pressed together, meeting the conditions for ignition testing.

[0040] During actual ignition, the end of the gas-sealing rod 9 is tightly fitted against the inner wall of the combustion chamber 15 opening due to the positive pressure of the high chamber pressure inside the combustion chamber 15, thus sealing the combustion chamber 15 and ensuring no gas leakage during ignition and combustion. Under the high chamber pressure generated inside the combustion chamber 15, the gas-sealing rod 9 undergoes a certain amount of elastic deformation. Additionally, approximately 30 MPa of high-pressure gas remains in the filling channel 14. If the gas-sealing rod 9 is not pulled back in time, it will rebound during the after-effect period and tend to slide into the combustion chamber 15 under the influence of the reverse pressure difference, causing backfire combustion of the gas in the filling channel 14. Therefore, the cylinder 1 will continue to extend, causing the wedge to press against the clamping block 6 along the inclined surface, further tightening the gas-sealing rod 9 away from the combustion chamber 15. The clamping force between the wedge and the clamping block 6 achieves locking, preventing the gas-sealing rod 9 from sliding into the combustion chamber 15, ensuring a sealing effect and preventing isolation failure and malfunction.

[0041] For ease of description, such as Figure 9 As shown, the side of the air-sealing rod 9 facing the combustion chamber is defined as the left side, and the side facing the clamping block 6 is defined as the right side; the side of the wedge extending vertically is defined as the upper side, and the other side is defined as the lower side.

[0042] As a preferred example of the present invention, such as Figure 1-5 As shown, the wedge is a U-shaped fork 5. The bottom 53 of the U-shaped fork 5 is connected to the second side wall 52 and the first side wall 51 on the front and rear sides respectively. The first side wall 51 is provided with a first inclined surface, the second side wall 52 is provided with a first inclined surface, and the pressing block 6 is provided with a second inclined surface on both the front and rear sides facing the end of the U-shaped fork 5.

[0043] This structural design of the U-shaped fork 5 allows it to move toward the pressing block 6 and contact the pressing block 6. When the pressing block 6 is in contact with the pressing block 6, a portion of the pressing block 6 extends into the slot of the U-shaped fork 5. The inner side of the slot bottom 53 abuts against the top of the pressing block 6. The first inclined surface of the first sidewall 51 presses against the corresponding second inclined surface, and the first inclined surface of the second sidewall 52 presses against the corresponding second inclined surface. This increases the contact area between the U-shaped fork 5 and the pressing block 6, thereby increasing the force generated in the horizontal direction and improving the sealing effect on the combustion chamber 15. Furthermore, under the action of reverse pressure difference, when the air-sealing rod 9 drives the clamping block 6 to move toward the combustion chamber 15 (i.e., to the left), the first side wall 51 and the second side wall 52 can limit and lock the degree of horizontal movement. When the clamping block 6 contacts the two side walls, it cannot continue to move toward the combustion chamber 15 and reach the termination position, preventing the air-sealing rod 9 from automatically sliding toward the side of the combustion chamber 15 when subjected to reverse pressure difference, which would cause the sealed opening of the combustion chamber 15 to be opened.

[0044] The U-shaped fork 5 can be made of steel to ensure sufficient strength during use.

[0045] like Figure 9 As shown, a connecting frame 17 is provided on the side of the pipe 16 facing the clamping block 6. The connecting frame 17 connects the cylinder mounting seat 2 and the support 8. The cylinder 1 is connected to the connecting frame 17 through the cylinder mounting seat 2. The support 8 is provided with a linear guide rail 7. The clamping block 6 is slidably connected to the linear guide rail 7.

[0046] The cylinder mounting base 2 provides a mounting point for the cylinder 1, and the support 8 provides a mounting point for the clamping block 6, making the installation more stable and secure. The linear guide rail 7 ensures that the clamping block 6 moves linearly in the horizontal direction, preventing tilting when the air-sealing rod 9 moves, thus better ensuring sealing and filling effects.

[0047] The wedge-locking mechanism further includes a fixed slide 4 and a screw cylinder 3. The fixed slide 4 is disposed between the cylinder mounting seat 2 and the U-shaped fork 5 and is connected to the connecting frame 17. The first end of the screw cylinder 3 is connected to the piston rod of the cylinder 1, and the second end passes through the fixed slide 4 and is connected to the top outer wall of the U-shaped fork 5. The screw cylinder 3 has a protrusion 31 between its first end and the fixed slide 4, and the screw cylinder 3 can move in the vertical direction within the fixed slide 4.

[0048] The fixed slide 4 provides an mounting point for positioning the screw barrel 3 on the connecting frame 17. The protrusion 31 can limit and lock the vertical movement of the U-shaped fork 5, preventing the U-shaped fork 5 from pressing the clamping block 6 indefinitely, thus avoiding the complete pulling of the end of the air-sealing rod 9 out of the combustion chamber 15 after sealing. Specifically, when the cylinder 1 extends and drives the screw barrel 3 and U-shaped fork 5 to move closer to the clamping block 6, when the protrusion 31 touches the fixed slide 4, the fixed slide 4 blocks the screw barrel 3 from continuing to move, preventing the U-shaped fork 5 from excessively pressing the clamping block 6, thus realizing the self-locking function of the cylinder 1.

[0049] The fixed slide 4 is positioned to match the stroke of the cylinder 1 and the stroke of the air-closing rod 9, thereby limiting the movement of the U-shaped fork 5 and ensuring the accuracy of the movement.

[0050] The present invention uses the limiting effect of the two side walls of the U-shaped fork 5 on the pressing block 6 and the limiting and locking effect of the screw cylinder 3 on the U-shaped fork 5 to more accurately control the air-sealing rod 9, ensuring sealing performance and safety of use.

[0051] A sleeve 13 and a bolt 12 are provided at the slot of the U-shaped fork 5. The front and rear sides of the sleeve 13 pass through the two sides of the slot and are tightened with bolts 12 to connect the sleeve 13 to the slot of the U-shaped fork 5. The bolts 12 and the sleeve 13 form a blocking part at the slot.

[0052] This design allows a portion of the clamping block 6 to extend between the groove bottom 53 of the U-shaped fork 5 and the sleeve 13. When the U-shaped fork 5 moves vertically away from the clamping block 6 until the sleeve 13 contacts the clamping block 6, the U-shaped fork 5 cannot move further, thus limiting its vertical movement and preventing the U-shaped fork 5 and the clamping block 6 from separating too far, which would increase the load on the cylinder 1.

[0053] The wedge-tightening self-locking mechanism includes a hollow screw plug ring 11. The first end of the screw plug ring 11 passes through the connecting frame 17 and cooperates with the air-locking rod 9 to seal the first side opening of the pipe 16. The second end of the screw plug ring 11 abuts against the right side of the connecting frame 17. The first end of the air-locking rod 9 passes through the screw plug ring 11 and is connected to the pressing block 6 through the pin 10.

[0054] The air-sealing rod 9 and the screw plug ring 11 form a dynamic seal, ensuring that the air-sealing rod 9 can slide flexibly within the pipe 16 while also providing a reliable seal.

[0055] The second side opening of the pipe 16 is connected to the opening of the combustion chamber 15, and the air-sealing rod 9 can slide left and right inside the pipe 16.

[0056] Optionally, the first end of the air-locking rod 9 has a through hole, the first end of the air-locking rod 9 extends into the clamping block 6, the pin 10 passes through the through hole and extends out of the through hole on both the upper and lower sides of the pin 10, and abuts against the inner wall surface of the clamping block 6, thereby connecting the clamping block 6 and the air-locking rod 9.

[0057] To better improve the sealing and self-locking effect, such as Figure 9 As shown, the cylinder 1, U-shaped fork 5, clamping block 6, and air-closing rod 9 are each provided in two sets, and are distributed vertically. The clamping block 6 and air-closing rod 9 of the upper set are located at the same height as the clamping block 6 and air-closing rod 9 of the lower set, which also helps to make the structure compact and reduce the space occupied.

[0058] Taking the upper side group as an example, along the direction from top to bottom, the first inclined surface of the U-shaped fork 5 is inclined to the left, and the second inclined surface of the pressing block 6 is inclined to the left. When the U-shaped fork 5 presses down on the pressing block 6, the first inclined surface squeezes the second inclined surface.

[0059] The end of the air-sealing rod 9 is a conical structure, and the end of the air-sealing rod 9 is sealed with the conical surface of the opening groove of the combustion chamber 15.

[0060] The conical structure makes the end of the air-sealing rod 9 wider on the left and narrower on the right. When the air-sealing rod 9 moves to the right and the conical structure is located in the opening groove, the conical structure can seal and close the opening. When the air-sealing rod 9 moves to the left and the conical structure extends beyond the opening groove and a part of the end of the air-sealing rod 9 extends into the combustion chamber 15, the second side opening of the pipe 16 and the combustion chamber 15 are connected.

[0061] like Figure 7 As shown, the pipe 16 is connected to the filling channel 14 and is used to fill fuel into the pipe 16 through the filling channel 14.

[0062] like Figure 8 As shown, the pipe 16 has a spline structure. This design utilizes the gaps between the spline teeth as a flow path for fuel injection, ensuring the flow of fuel gas from the pipe 16 to the combustion chamber 15. Compared to a smooth inner wall of the pipe, the spline structure reduces the distance between it and the air-sealing rod 9, thereby reducing the radial wobbling of the air-sealing rod 9 and preventing positional displacement during sealing that could affect the sealing effect.

[0063] The present invention also proposes a launch test device, which includes the above-mentioned cylinder-driven air-closing rod wedge self-locking mechanism, as well as conventional structures such as combustion chamber 15 and ignition system. Since these conventional structures and connections are prior art, they will not be described in detail here.

[0064] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A cylinder-driven sealing rod wedge self-locking mechanism for sealing and opening a combustion chamber (15), characterized in that, The device includes a cylinder (1), a wedge, a clamping block (6), and a shut-off rod (9). The shut-off rod (9) extends horizontally and is at least partially located inside a pipe (16). The wedge extends vertically. The end of the shut-off rod (9) engages with the opening of the combustion chamber (15) to open or close the opening. The head of the shut-off rod (9) is connected to the clamping block (6). The piston rod of the cylinder (1) is connected to the outer wall of the top surface of the wedge. One side of the wedge is a first inclined surface, and the side of the clamping block (6) facing the wedge is a second inclined surface. The first inclined surface engages with the second inclined surface.

2. The wedge-locking self-locking mechanism according to claim 1, characterized in that, The wedge is a U-shaped fork (5). The bottom (53) of the U-shaped fork (5) is connected to the second sidewall (52) and the first sidewall (51) on the front and rear sides respectively. The first sidewall (51) is provided with a first inclined surface, and the second sidewall (52) is provided with a first inclined surface. The pressing block (6) is provided with a second inclined surface on both the front and rear sides facing the end of the U-shaped fork (5).

3. The wedge-locking self-locking mechanism according to claim 1, characterized in that, A connecting frame (17) is provided on the side of the pipe (16) facing the clamping block (6). The connecting frame (17) connects the cylinder mounting seat (2) and the support (8). The cylinder (1) is connected to the connecting frame (17) through the cylinder mounting seat (2). The support (8) is provided with a linear guide rail (7). The clamping block (6) is slidably connected to the linear guide rail (7).

4. The wedge-locking self-locking mechanism according to claim 2, characterized in that, The wedge-locking mechanism further includes a fixed slide (4) and a screw (3). The fixed slide (4) is located between the cylinder mounting seat (2) and the U-shaped fork (5) and is connected to the connecting frame (17). The first end of the screw (3) is connected to the piston rod of the cylinder (1), and the second end passes through the fixed slide (4) and is connected to the top outer wall of the U-shaped fork (5). The screw (3) has a protrusion (31) between its first end and the fixed slide (4). The screw (3) can move in the vertical direction within the fixed slide (4).

5. The wedge-locking self-locking mechanism according to claim 2, characterized in that, A sleeve (13) and a bolt (12) are provided at the slot of the U-shaped fork (5). The front and rear sides of the sleeve (13) pass through the two sides of the slot respectively and are tightened with bolts (12) to connect the sleeve (13) to the slot of the U-shaped fork (5). The bolts (12) and the sleeve (13) form a blocking part at the slot.

6. The wedge-locking self-locking mechanism according to claim 3, characterized in that, The wedge-tightening self-locking mechanism includes a hollow screw plug ring (11). The first end of the screw plug ring (11) passes through the connecting frame (17) and cooperates with the air-locking rod (9) to seal the first side opening of the pipe (16). The second end of the screw plug ring (11) abuts against the right side of the connecting frame (17). The first end of the air-locking rod (9) passes through the screw plug ring (11) and is connected to the pressing block (6) through the pin (10).

7. The wedge-locking self-locking mechanism according to claim 2, characterized in that, The cylinder (1), U-shaped fork (5), clamping block (6), and air-closing rod (9) are each provided in two sets and are distributed vertically. The clamping block (6) and air-closing rod (9) of the upper set are located at the same height as the clamping block (6) and air-closing rod (9) of the lower set.

8. The wedge-locking self-locking mechanism according to claim 1, characterized in that, The end of the air-sealing rod (9) is a conical structure, and the end of the air-sealing rod (9) is sealed with the conical surface of the opening groove of the combustion chamber (15).

9. The wedge-locking self-locking mechanism according to claim 1, characterized in that, The pipe (16) has a spline structure.

10. The wedge-locking self-locking mechanism according to claim 6, characterized in that, The first end of the air-sealing rod (9) has a through hole. The first end of the air-sealing rod (9) extends into the pressing block (6). The pin (10) passes through the through hole and extends out of the through hole on both the upper and lower sides of the pin (10) and abuts against the inner wall surface of the pressing block (6), thereby realizing the connection between the pressing block (6) and the air-sealing rod (9).

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