Light gas gun capable of automatically controlling replacement of diaphragm

Abstract

The invention relates to the technical field of light-gas guns, in particular to a light-gas gun capable of automatically controlling diaphragm replacement. According to the technical scheme, the target comprises a target bin and a gun barrel fixedly installed on the target bin, a gas storage chamber is installed on one side of the gun barrel, the target further comprises a connecting part installed between the gas storage chamber and the gun barrel, and the connecting part comprises a gun barrel connecting section fixedly installed on the gun barrel and a transition section fixedly installed on the gas storage chamber. A rotating threaded sleeve and a sliding component are rotationally installed on the transition section, and the sliding component is connected with the connecting component and drives the connecting component to move in the axis direction of the sliding component. According to the invention, based on accurate torque control of the motor driving the rotating gear, and in combination with step-by-step displacement of the power sliding block, the traditional diaphragm replacement process of 1-2 hours of manual disassembly is compressed to be within 15 minutes, so that the working efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of light gas gun, and particularly relates to a light gas gun capable of automatically controlling and replacing a diaphragm. BACKGROUND

[0002] As a core device for impact dynamics research, the working principle of the light gas gun is based on the release of high-pressure gas in the gas storage chamber through the diaphragm control, which pushes the projectile to accelerate to super-high speed along the barrel. In the dynamic performance test of the material, the device measures the stress wave propagation characteristics and the deformation response of the sample generated by the projectile impacting the target, and inversely calculates the constitutive relation of the material under high strain rate. In terms of energy transmission, the fluid pressure in the gas storage chamber does work on the projectile to convert into kinetic energy. In this process, the ratio of gas expansion work to projectile kinetic energy needs to be accurately calculated to evaluate the mechanical efficiency of the system.

[0003] The traditional structure relies on manual disassembly of the bolt assembly during the diaphragm replacement process. The pre-tightening force of the fastener is controlled by torque during the operation process, and the lack of accuracy may lead to sealing failure or component overload, thereby affecting the repeatability of experimental data. SUMMARY

[0004] The purpose of the present application is to solve the problems in the background art. The present application proposes a collaborative design of electric drive and mechanical structure to realize one-key quick disassembly and installation of the diaphragm, and constructs a conical sealing structure to ensure the sealing performance in the high-pressure environment, thereby solving the problems of low replacement efficiency and poor sealing effect in the prior art.

[0005] The technical scheme of the present application is a light gas gun capable of automatically controlling and replacing a diaphragm, which comprises a target chamber and a barrel fixedly installed on the target chamber. One side of the barrel is provided with a gas storage chamber. The light gas gun further comprises:

[0006] A connecting component is installed between the gas storage chamber and the barrel. The connecting component comprises a barrel connecting segment fixedly installed on the barrel and a transition segment fixedly installed on the gas storage chamber. A rotating threaded sleeve is rotatably installed on the transition segment, and the rotating threaded sleeve is threadedly connected with the barrel connecting segment.

[0007] A protective cover is fixedly installed on the transition segment. A driving mechanism for driving the rotating threaded sleeve to rotate is installed on the protective cover.

[0008] A sliding component is connected with the connecting component and drives the connecting component to move along the axial direction thereof.

[0009] A diaphragm is installed between the transition segment and the barrel connecting segment. A butt joint sealing sleeve is fixedly installed on one end of the transition segment close to the barrel connecting segment. A metal sealing ring is fixedly installed outside the butt joint sealing sleeve.

[0010] Optionally, the driving mechanism comprises a motor fixedly installed on the protective cover, a rotating gear and a rotating threaded sleeve gear coaxially and rotatably installed inside the protective cover, and the output shaft of the motor is coaxially and fixedly connected with the rotating gear.

[0011] Optionally, the transition section is fixedly installed with a first bearing and a planar thrust bearing, and the outer rings of the first bearing and the planar thrust bearing are fixedly connected with the inner wall of the rotating threaded sleeve.

[0012] Optionally, the protective cover is fixedly installed with a plurality of roller supports, the roller supports are rotatably installed with rollers, and the protective cover is installed with a second bearing between the protective cover and the transition section.

[0013] Optionally, the sliding component comprises a plurality of linear guides fixedly installed with the ground, one of the linear guides is slidably installed with a power slide block moving along the linear guide, the power slide block is fixedly connected with the gas storage chamber, and a plurality of driven slide blocks are slidably installed on the linear guides, and the driven slide blocks are fixedly connected with the protective cover and the gas storage chamber.

[0014] Optionally, the sensing component comprises a sensing probe fixedly installed at one end of the linear guide connected with the protective cover, a high-pressure chamber pressure residual sensor fixedly installed inside the gas storage chamber, and a target chamber negative pressure residual sensor fixedly installed inside the target chamber.

[0015] Optionally, one end of the transition section is fixedly installed with a plurality of separation springs, and the other end of the separation springs points to the cannon barrel connecting section.

[0016] Optionally, the cannon barrel connecting section is installed with a contraction positioning component, the contraction positioning component controls the inner diameter of the connection between the cannon barrel connecting section and the diaphragm, and positions the center of the diaphragm.

[0017] Optionally, the contraction positioning component comprises a compression ring fixedly installed inside the cannon barrel connecting section and having radial contraction capability, the outer ring of the compression ring is fixedly connected with the inner wall of the cannon barrel connecting section, the cannon barrel connecting section is fixedly installed with a liquid storage cylinder, the liquid storage cylinder is slidably and sealingly connected with a pressing plate, the pressing plate is fixedly installed with a driving rod, the cannon barrel connecting section is fixedly installed with a first push rod motor, the output shaft of the first push rod motor is fixedly connected with the driving rod, and the liquid storage cylinder and the compression ring are filled with hydraulic medium.

[0018] Optionally, the shrink positioning component further comprises a plurality of positioning rods fixedly connected with the inner ring of the compression ring, a plurality of positioning cylinders corresponding to the positioning rods are fixedly installed in the cannon barrel connecting section, a sealing plate is slidably and sealingly connected in the positioning cylinder, the sealing plate is fixedly connected with the positioning rod, a plurality of adjusting cylinders corresponding to the positioning cylinders are fixedly installed in the cannon barrel connecting section, a blocking plug is slidably and sealingly connected in the adjusting cylinder, a synchronous plate is slidably installed in the cannon barrel connecting section, a connecting shaft is fixedly installed on the blocking plug, the other end of the connecting shaft is fixedly connected with the synchronous plate, a second push rod motor is fixedly installed in the cannon barrel connecting section, and an output shaft of the second push rod motor is fixedly connected with the synchronous plate.

[0019] In summary, the present application has at least one of the following beneficial technical effects:

[0020] Based on the precise torque control of the motor-driven rotating gear, combined with the step-by-step displacement of the power slider, the traditional manual disassembly of 1-2 hours of the diaphragm replacement process is compressed to 15 minutes, and the whole process only needs one "one-key separation" command to trigger automatic decoupling, and the "reset" button starts the sealing reconstruction after manual replacement, which greatly improves the work efficiency.

[0021] Through the interference fit of the conical groove in the cannon barrel connecting section and the conical structure of the transition section, the controllable compression deformation of the double O-shaped ring embedded in the butt joint sealing sleeve is generated, and the radial expansion of the metal sealing ring is limited, so that the total gas mass leakage rate of the interface is ≤0.1% under the condition of 20MPa, which is one order of magnitude lower than the leakage rate of the traditional flange sealing. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Structure diagram of the structure of the light gas gun profile for automatic control of diaphragm replacement;

[0023] Figure 2 Structure diagram of the structure of the light gas gun profile for automatic control of diaphragm replacement;

[0024] Figure 3 Structure diagram of the installation position of the device;

[0025] Figure 4 Structure diagram of the shrink positioning component;

[0026] Figure 5 Structure diagram of Figure 4 Structure diagram of the local enlargement of A in the middle.

[0027] Reference numerals: 101, barrel connection section; 102, transition section; 103, rotating threaded sleeve; 104, gas storage chamber; 105, barrel; 106, target compartment; 201, motor; 202, rotating gear; 203, rotating threaded sleeve gear; 204, first bearing; 205, planar thrust bearing; 301, roller bracket; 302, roller; 303, second bearing; 304, protective cover; 401, driven slider; 402, powered slider; 403, linear guide rail; 501, sensing probe; 5 02. High-pressure chamber residual pressure sensor; 503. Target chamber negative pressure residual sensor; 504. Separation spring; 601. Butt sealing sleeve; 602. Metal sealing ring; 603. Diaphragm; 701. Compression ring; 702. Liquid storage cylinder; 703. Pressure plate; 704. Drive rod; 705. First push rod motor; 706. Positioning rod; 707. Positioning cylinder; 708. Sealing plate; 709. Adjusting cylinder; 710. Sealing plug; 711. Synchronization plate; 712. Second push rod motor; 713. Connecting shaft. Detailed Implementation

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1, as Figures 1 to 3 As shown, the present invention proposes an automatic controllable diaphragm replacement light gas gun, including a target chamber 106 and a gun barrel 105 fixedly installed on the target chamber 106. A gas storage chamber 104 is installed on one side of the gun barrel 105. The target chamber 106 is an experimental terminal energy absorption and data acquisition cavity, which records the stress wave propagation trajectory and material damage morphology at the moment the projectile hits the target through a built-in high-speed camera and dynamic sensor array. The gun barrel 105 is a channel for ultra-high-speed kinetic energy transfer, and the gas storage chamber 104 is a high-pressure fluid energy storage and controllable release unit.

[0030] The light gas gun in this embodiment also includes a connecting component installed between the gas storage chamber 104 and the gun barrel 105. The connecting component includes a gun barrel connecting section 101 fixedly installed on the gun barrel 105 and a transition section 102 fixedly installed on the gas storage chamber 104. A rotating threaded sleeve 103 is rotatably installed on the transition section 102. The rotating threaded sleeve 103 is threadedly connected to the gun barrel connecting section 101. When the gun barrel connecting section 101 and the transition section 102 are connected, the gas storage chamber 104 and the target chamber 106 can be connected. By connecting the rotating threaded sleeve 103 to the gun barrel connecting section 101, the connection between the gun barrel connecting section 101 and the transition section 102 can be completed.

[0031] Further, the membrane 603 is installed between the transition section 102 and the barrel connecting section 101, the membrane 603 is a key pressure-bearing component for realizing controllable energy release of the light gas gun, the membrane 603 forms a stepped pressure rising edge at a breaking moment, suppresses turbulent disturbance, makes the gas expansion process closer to a quasi-one-dimensional isentropic flow model, improves the uniformity of the projectile acceleration, the transition section 102 is fixedly installed at one end close to the barrel connecting section 101, the butt joint sealing sleeve 601 is fixedly installed outside the transition section 102, the metal sealing ring 602 is fixedly installed outside the butt joint sealing sleeve 601, and the connection between the barrel connecting section 101 and the transition section 102 can be sealed by the butt joint sealing sleeve 601 and the metal sealing ring 602.

[0032] As shown in Figures 1 to 3 the light gas gun further includes the protective cover 304 fixedly installed on the transition section 102, the driving mechanism for driving the rotation of the threaded sleeve 103 is installed on the protective cover 304, the driving mechanism includes the motor 201 fixedly installed on the protective cover 304, the rotation gears 202 and the threaded sleeve gears 203 which are rotatably installed in the protective cover 304 and are in engagement with each other, the output shaft of the motor 201 is coaxially and fixedly connected with the rotation gears 202, the protective cover 304 is arranged outside the power driving mechanism, foreign matters are prevented from being wrapped in the engagement position of the rotation gears 202 and the threaded sleeve gears 203, the rotation gears 202 are driven to rotate by the motor 201, the threaded sleeve gears 203 are driven to rotate, the threaded sleeve 103 fixedly connected with the threaded sleeve gears 203 is driven to rotate, and the threaded sleeve 103 is threadedly connected with the barrel connecting section 101.

[0033] The first bearing 204 and the plane thrust bearing 205 are fixedly installed on the transition section 102, the outer rings of the first bearing 204 and the plane thrust bearing 205 are fixedly connected with the inner wall of the threaded sleeve 103, a plurality of roller supports 301 are fixedly installed on the protective cover 304, the rollers 302 are rotatably installed on the roller supports 301, the second bearing 303 is installed between the protective cover 304 and the transition section 102, the rollers 302 support the bottom of the threaded sleeve 103, and rotation jamming is prevented.

[0034] As shown in Figures 1 to 3As shown, the light gas gun further comprises a sliding component connected with the connecting component and driving the connecting component to move along the axial direction thereof, the sliding component comprises a plurality of linear guides 403 fixedly installed on the ground, one of the linear guides 403 is slidably installed with a power slider 402 moving along the linear guide 403, the power slider 402 is fixedly connected with the gas storage chamber 104, a plurality of driven sliders 401 are slidably installed on the linear guide 403, the driven sliders 401 are respectively fixedly connected with the protective cover 304 and the gas storage chamber 104, the power slider 402 can drive the gas storage chamber 104 to move along the axial direction of the linear guide 403, thereby driving the protective cover 304 and the connecting component to move, so that the rotating threaded sleeve 103 approaches or moves away from the barrel connecting section 101.

[0035] As shown in the figure, Figures 1 to 3 The light gas gun further comprises a sensing component, the sensing component comprises a sensing probe 501 fixedly installed at one end of the linear guide 403 connected with the protective cover 304, a high-pressure chamber pressure residual sensor 502 fixedly installed inside the gas storage chamber 104, and a target chamber negative pressure residual sensor 503 fixedly installed inside the target chamber 106, after the light gas gun is launched, the safety check is started by the control system, at this time the high-pressure chamber pressure residual sensor 502 detects whether the high-pressure chamber pressure is ≤400KPa, and the target chamber negative pressure residual sensor 503 confirms that the target chamber pressure is greater than 90KPa, after the two conditions are met, the next step is entered.

[0036] The transition section 102 is fixedly installed at one end with a plurality of separation springs 504, the other end of the separation spring 504 points to the barrel connecting section 101, when the rotating threaded sleeve 103 is separated from the barrel connecting section, the separation spring 504 releases the elastic force and can push the transition section 102 to move back 3cm, at this time the sensing probe 501 detects the displacement signal, the power slider 402 drives the overall structure to move back 50cm to the replacement station, facilitating the replacement of the diaphragm 603.

[0037] Working principle: the operation of the light gas gun starts from the safety check stage: the control system confirms that the pressure of the gas storage chamber 104 is ≤400kPa through the high-pressure chamber pressure residual sensor 502, and the target chamber negative pressure residual sensor 503 verifies that the pressure of the target chamber 106 is ≥90kPa, after the two conditions are met, the separation process is started;

[0038] The power slider 402 is moved 5 cm backward along the linear guide rail 403 to reserve a threaded operation space, the motor 201 drives the rotating gear 202 in reverse to engage the rotating threaded sleeve gear 203, drives the rotating threaded sleeve 103 to rotate, releases the threaded connection with the barrel connecting section 101, and separates the spring 504 to push the transition section 102 3 cm backward to separate the conical sealing surface, the inductive probe 501 detects the displacement to the position, the power slider 402 is linked to the driven slider 401 to move 50 cm backward to the replacement station, and the system enters a mechanical self-locking state;

[0039] The damaged diaphragm 603 is manually removed, a new diaphragm is placed in the installation groove after cleaning, and coaxiality is calibrated, the unlocking button is pressed to release the self-locking;

[0040] The power slider 402 is moved 50 cm forward to the butt joint station, the inductive probe 501 is positioned, the motor 201 is driven in forward rotation to drive the rotating threaded sleeve 103 to screw; axial force is applied through the plane thrust bearing 205 to force the conical structure of the transition section 102 to be embedded in the inner conical sealing groove of the barrel connecting section 101, at this time, the two O-rings embedded in the butt joint sealing sleeve 601 are compressed to produce 0.5-1 mm deformation, the metal sealing ring 602 cooperates to limit radial expansion to form double sealing, after reset, the system is locked into a waiting state.

[0041] High-pressure gas is filled into the gas storage chamber 104, usually 20-100 MPa, the diaphragm 603 is accurately broken under the preset circumferential stress, the gas expands to push the projectile to accelerate to super-high speed through the barrel 105, and finally impacts the sample in the target chamber 106 to generate a dynamic stress wave, which is recorded and measured by the sensor to obtain a force-time curve.

[0042] As shown in Embodiment Two, Figure 4 and Figure 5 As shown in Embodiment Two, based on the basis of Embodiment One, a contraction positioning component is installed in the barrel connecting section 101, the contraction positioning component controls the inner diameter of the connection between the barrel connecting section 101 and the diaphragm 603, and positions the center of the diaphragm 603, if the installation groove supporting the diaphragm 603 is relatively tight with the diaphragm 603, it is not conducive to installation, if there is a gap, it cannot guarantee the coaxiality of the diaphragm 603 and the barrel 105, that is, there is a contradiction of "tight and difficult to install, loose and eccentric", which can be solved by the contraction positioning component.

[0043] Further, the contraction positioning component includes a compression ring 701 fixedly installed in the barrel connecting section 101 and having radial contraction capability, the outer ring of the compression ring 701 is fixedly connected with the inner wall of the barrel connecting section 101, a liquid storage cylinder 702 is fixedly installed in the barrel connecting section 101, a pressing plate 703 is slidably and sealingly connected in the liquid storage cylinder 702, a driving rod 704 is fixedly installed on the pressing plate 703, a first push rod motor 705 is fixedly installed in the barrel connecting section 101, the output shaft of the first push rod motor 705 is fixedly connected with the driving rod 704, the liquid storage cylinder 702 and the compression ring 701 are both filled with hydraulic medium, the hydraulic medium is a liquid that cannot be compressed under working environment, when the diaphragm 603 is installed, the first push rod motor 705 drives the pressing plate 703 to move backward, the hydraulic medium in the compression ring 701 is extracted, the inner ring of the compression ring 701 is expanded outward, the diameter of the inner ring of the compression ring 701 is expanded, the diaphragm 603 is inserted and installed, when the diaphragm 603 is inserted, the first push rod motor 705 drives the pressing plate 703 to move reversely, the moving pressing plate 703 pushes the hydraulic medium into the compression ring 701, the compression ring 701 compresses the diaphragm 603, the first push rod motor 705 is integrated with a pressure sensing system, when the specified pressure value is reached, the positioning is automatically performed, the constant pressure on the diaphragm 603 is maintained, and the installation and fixation of the diaphragm 603 are completed.

[0044] Further, the contraction positioning component further comprises a plurality of positioning rods 706 fixedly connected with the inner ring of the compression ring 701, a plurality of positioning cylinders 707 corresponding to the positioning rods 706 are fixedly installed in the cannon barrel connecting section 101, a sealing plate 708 is slidably and sealingly connected in the positioning cylinder 707, the sealing plate 708 is fixedly connected with the positioning rod 706, a plurality of adjusting cylinders 709 corresponding to the positioning cylinders 707 are fixedly installed in the cannon barrel connecting section 101, a blocking plug 710 is slidably and sealingly connected in the adjusting cylinder 709, a synchronous plate 711 is slidably installed in the cannon barrel connecting section 101, a connecting shaft 713 is fixedly installed on the blocking plug 710, the other end of the connecting shaft 713 is fixedly connected with the synchronous plate 711, a second push rod motor 712 is fixedly installed in the cannon barrel connecting section 101, the output shaft of the second push rod motor 712 is fixedly connected with the synchronous plate 711, in order to prevent the compression ring 701 from being deformed to cause the axis of the diaphragm 603 to be deviated, the plurality of positioning rods 706 are arranged to support the compression ring 701, the compression ring 701 can be effectively positioned through the fixed points of the ends of the positioning rods 706, the synchronous plate 711 is driven to move by the second push rod motor 712, the connecting shaft 713 is driven to move, the adjusting cylinder 709 is driven to move by the moving connecting shaft 713, the hydraulic medium in the adjusting cylinder 709 enters the positioning cylinder 707, the plurality of positioning rods 706 are synchronously moved, the intersection of the extension lines of the plurality of positioning rods 706 can always coincide with the axis of the cannon barrel 105, and the positioning accuracy of the diaphragm 603 is further ensured.

[0045] The above specific embodiments are only several optional embodiments of the present application, and based on the technical solutions of the present application and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A lightweight gas cannon with automatic diaphragm replacement control, comprising a target chamber (106) and a cannon barrel (105) fixedly mounted on the target chamber (106), wherein a gas storage chamber (104) is installed on one side of the cannon barrel (105), characterized in that, Also includes: A connecting component is installed between the gas storage chamber (104) and the gun barrel (105). The connecting component includes a gun barrel connecting section (101) fixedly installed on the gun barrel (105) and a transition section (102) fixedly installed on the gas storage chamber (104). A rotating threaded sleeve (103) is rotatably installed on the transition section (102), and the rotating threaded sleeve (103) is threadedly connected to the gun barrel connecting section (101). A protective cover (304) is fixedly installed on the transition section (102), and a drive mechanism for driving the rotating threaded sleeve (103) to rotate is installed on the protective cover (304); A sliding component, which is connected to the connecting component and drives the connecting component to move along its axial direction; A diaphragm (603) is installed between the transition section (102) and the barrel connection section (101). A mating sealing sleeve (601) is fixedly installed on one end of the transition section (102) near the barrel connection section (101). A metal sealing ring (602) is fixedly installed on the outside of the mating sealing sleeve (601).

2. The lightweight gas cannon with automatic diaphragm replacement according to claim 1, characterized in that, The drive mechanism includes a motor (201) fixedly mounted on the protective cover (304), a rotating gear (202) meshing with each other and rotatably mounted inside the protective cover (304), and a rotating threaded sleeve gear (203). The output shaft of the motor (201) is coaxially and fixedly connected to the rotating gear (202).

3. A lightweight gas cannon with automatic diaphragm replacement according to claim 2, characterized in that, A first bearing (204) and a planar thrust bearing (205) are fixedly installed on the transition section (102), and the outer rings of the first bearing (204) and the planar thrust bearing (205) are fixedly connected to the inner wall of the rotating threaded sleeve (103).

4. A lightweight gas cannon with automatic diaphragm replacement according to claim 3, characterized in that, Multiple roller brackets (301) are fixedly installed on the protective cover (304), and rollers (302) are rotatably installed on the roller brackets (301). A second bearing (303) is installed between the protective cover (304) and the transition section (102).

5. A lightweight gas cannon with automatic diaphragm replacement according to claim 4, characterized in that, The sliding component includes multiple linear guide rails (403) fixedly installed on the ground. A power slider (402) that moves along the linear guide rail (403) is slidably installed on one of the linear guide rails (403). The power slider (402) is fixedly connected to the gas storage chamber (104). Multiple driven sliders (401) are slidably installed on the linear guide rail (403). The driven sliders (401) are fixedly connected to the protective cover (304) and the gas storage chamber (104) respectively.

6. A lightweight gas cannon with automatic diaphragm replacement according to claim 5, characterized in that, It also includes sensing components, which include a sensing probe (501) fixedly installed at one end of a linear guide rail (403) connected to the protective cover (304), a high-pressure chamber pressure residual sensor (502) fixedly installed inside the gas storage chamber (104), and a target chamber negative pressure residual sensor (503) fixedly installed inside the target chamber (106).

7. A lightweight gas cannon with automatic diaphragm replacement according to claim 6, characterized in that, Multiple separation springs (504) are fixedly installed at one end of the transition section (102), and the other end of the separation springs (504) points to the barrel connection section (101).

8. A lightweight gas cannon with automatic diaphragm replacement according to claim 1, characterized in that, A shrinkage positioning component is installed inside the barrel connection section (101). The shrinkage positioning component controls the inner diameter of the connection between the barrel connection section (101) and the diaphragm (603) and positions the center of the diaphragm (603).

9. A lightweight gas cannon with automatic diaphragm replacement according to claim 8, characterized in that, The shrinkage positioning component includes a clamping ring (701) with radial shrinkage capability, which is fixedly installed inside the barrel connection section (101). The outer ring of the clamping ring (701) is fixedly connected to the inner wall of the barrel connection section (101). A liquid storage cylinder (702) is fixedly installed inside the barrel connection section (101). A pressure plate (703) is slidably and sealed inside the liquid storage cylinder (702). A drive rod (704) is fixedly installed on the pressure plate (703). A first push rod motor (705) is fixedly installed inside the barrel connection section (101). The output shaft of the first push rod motor (705) is fixedly connected to the drive rod (704). Hydraulic medium is filled on one side of the liquid storage cylinder (702) and inside the clamping ring (701).

10. A lightweight gas cannon with automatic diaphragm replacement according to claim 9, characterized in that, The retraction positioning component also includes multiple positioning rods (706) fixedly connected to the inner ring of the clamping ring (701). Multiple positioning cylinders (707) corresponding one-to-one with the positioning rods (706) are fixedly installed inside the barrel connection section (101). A sealing plate (708) is slidably and sealingly connected inside each positioning cylinder (707). The sealing plate (708) is fixedly connected to the positioning rods (706). Multiple adjusting cylinders (707) corresponding one-to-one with the positioning cylinders (707) are fixedly installed inside the barrel connection section (101). 9) A sealing plug (710) is slidably and sealingly connected inside the adjusting cylinder (709). A synchronizing plate (711) is slidably installed inside the barrel connecting section (101). A connecting shaft (713) is fixedly installed on the sealing plug (710). The other end of the connecting shaft (713) is fixedly connected to the synchronizing plate (711). A second push rod motor (712) is fixedly installed inside the barrel connecting section (101). The output shaft of the second push rod motor (712) is fixedly connected to the synchronizing plate (711).

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