Adjustable vacuum gate valve with self-locking function

Abstract

The present application relates to the technical fields of vacuum gate valve, and discloses an adjustable vacuum gate valve with self-locking function, which comprises a mounting seat, a shell connected with the mounting seat, an air inlet nozzle, an air outlet nozzle and a pressure relief assembly arranged on the shell respectively, a piston located in the shell and movably connected with the shell, a driving assembly arranged on the piston, a valve rod connected with the driving assembly, a valve plate connected with the valve rod, a pad arranged on the valve plate, and a limiting assembly located in the mounting seat; the vacuum gate valve drives the bellows sleeve to move through the driving spring, so that the valve rod can extend out of the mounting seat, the valve plate abuts against the vacuum chamber, and in the process of movement of the valve rod, the driving wheel also moves on the driving block, drives the valve plate to swing, so that a certain extrusion force can be generated between the valve plate and the vacuum chamber, and the sealing work of the vacuum chamber is completed.

Description

Technical Field

[0001] This invention relates to the technical field of vacuum valves, specifically an adjustable vacuum valve with a self-locking function. Background Technology

[0002] Vacuum valves are key sealing and control components suitable for vacuum systems (especially in industrial applications such as bellows welding). Through the coordinated structure of the valve stem, piston, and drive assembly, they enable the opening and closing of media and pressure regulation in a vacuum environment. Their core advantages are high airtightness and low leakage rate, and they can withstand the slag spatter and metal vapor erosion in welding scenarios. To address issues such as clogging and wear, they often integrate self-locking, limit, and strain detection functions, combined with wear-resistant sealing materials and precise drive design, ensuring reliability and long service life under harsh operating conditions.

[0003] For example, Chinese patent CN217272258U discloses a vacuum valve, including a cover plate, a drive cylinder, and a linkage mechanism. The linkage mechanism includes a main connecting rod and at least one set of folding connecting rod assemblies. One end of the movable connecting rod is fixedly connected to the main connecting rod, and the other end of the folding connecting rod assembly is fixedly connected to the cover plate. The drive cylinder is configured to drive the main connecting rod to rotate around an axis. In this utility model, the movement of the drive cylinder drives the main connecting rod to rotate around an axis, and the main connecting rod simultaneously drives the cover plate to open and close, thereby isolating or connecting the vacuum chambers at both ends of the vacuum valve.

[0004] However, existing vacuum valves have some problems. When the valve plate needs to fit with the vacuum chamber, the movement trajectory of the existing valve plate is mostly straight up or directly, which cannot fit well with the vacuum chamber. At the same time, the self-locking structure in existing vacuum valves is mostly active, which will cause the self-locking operation of the vacuum valve to fail when the power is cut off.

[0005] Therefore, how to enable vacuum valves to operate self-locking is a problem that needs to be solved. Summary of the Invention

[0006] The present invention provides an adjustable vacuum valve with a self-locking function to solve the above-mentioned problems existing in the prior art.

[0007] An adjustable vacuum valve with a self-locking function, including:

[0008] Mounting base, housing connected to the mounting base, air inlet, air outlet and pressure relief assembly respectively provided on the housing, piston located inside the housing and movably connected to the housing, drive assembly provided on the piston, valve stem connected to the drive assembly, valve plate connected to the valve stem, pad provided on the valve plate, and limiting assembly located in the mounting base;

[0009] There is a predetermined first gap between the drive assembly and the inner wall of the housing, and a self-locking assembly communicating with the first gap;

[0010] By charging or discharging air into the first gap through the air inlet or outlet, the air pressure inside the housing is adjusted, thereby changing the state of the self-locking component, causing it to move closer to or further away from the drive component, thus completing the self-locking and unlocking of the drive component.

[0011] Furthermore, the drive assembly includes a chuck fixedly mounted on the piston, a drive block disposed on the chuck, a drive groove provided on the drive block, and a drive wheel located within the drive groove;

[0012] The drive wheel is connected to the valve stem;

[0013] The chuck is provided with an annular limiting groove in the circumferential direction, and there is a gap between the chuck and the inner wall of the housing. The end of the chuck away from the piston is a frustum structure, so that the self-locking component can move along the curved surface of the frustum to the annular limiting groove to complete the self-locking of the vacuum valve.

[0014] The piston, chuck, and drive block are connected by bolts to form an integrated structure.

[0015] Furthermore, the drive assembly also includes a piston rod disposed on the chuck and sleeved on the valve stem, wherein a U-shaped groove is formed inside the piston rod, and the limiting assembly abuts against the shoulder of the groove;

[0016] The drive groove includes at least two semi-circular through holes of the same size, wherein there is a certain angle between the connecting line between the centers of the two through holes and the length direction of the drive block, and a connecting groove for the free ends of the two semi-circular through holes. By moving the drive wheel in the connecting groove and the semi-circular through holes, the valve stem swings, causing the valve plate to abut against the vacuum chamber and seal the vacuum chamber.

[0017] Furthermore, the limiting component includes a drive spring that abuts against the shoulder of the groove, a bellows sleeve connected to the other end of the drive spring and sleeved on the valve stem, a flange fixedly connected to the bellows sleeve, a bellows pipe connected to the flange, two push wheels symmetrically arranged on the bellows sleeve, and a limiting groove provided on the inner wall of the mounting base for the push wheels to move.

[0018] The limiting groove and the propulsion wheel are provided with a reserved space between the corrugated sleeve and the mounting base for the valve stem to swing freely.

[0019] Furthermore, the self-locking assembly includes a base fixedly mounted on the housing, a return spring located in the base, and a T-shaped locking block connected to the return spring;

[0020] The free end of the locking block extends into the housing. The housing is also provided with a transport hole, which is used to transport the gas in the housing to the base, so that the locking block pushes the return spring to move and change the position of the locking block.

[0021] Furthermore, the self-locking assembly also includes a drive rod fixedly installed on the top of the locking block, a limiting tube fixedly installed on the base, a mounting groove opened on the limiting tube, a limiting member movably connected to the mounting groove, a strain gauge fixedly installed in the mounting groove and abutting against the limiting member, and a detection part abutting against the strain gauge.

[0022] The reset spring is sleeved on the drive rod.

[0023] Furthermore, the limiting member includes a rod body, a first protrusion and a second protrusion connected to the rod body, wherein there is a predetermined angle between the first protrusion and the second protrusion;

[0024] The second protrusion extends into the limiting tube and abuts against the outer wall of the drive rod.

[0025] Furthermore, the base is also provided with a reset part;

[0026] The reset part includes a fixed seat fixedly installed on the base, at least two drive motors connected to the fixed seat, a first connecting rod connected to the output end of the drive motor, a second connecting rod movably connected to the first connecting rod, a universal ball movably connected to the fixed seat, an offset rod connected to the universal ball, rotating balls symmetrically arranged at both ends of the offset rod, a rotating seat movably connected to the rotating ball, and a lower pressure plate connected to one of the rotating seats.

[0027] Another rotating seat is movably connected to two second links.

[0028] Furthermore, the pressure relief assembly includes a second chamber fixedly installed on the housing, a first chamber fixedly connected to the second chamber, a second channel built into the second chamber, a first channel for connecting the second channel and the first chamber, a transport component located in the second channel, a compression spring located in the first chamber, and a sealing block connected to the compression spring and located in the first chamber.

[0029] The transport component includes a support base fixedly installed in the second chamber, an adjusting motor fixedly connected to the support base, a first bevel gear fixedly connected to the adjusting motor, a second bevel gear meshing with the first bevel gear, and a transport component connected to the second bevel gear.

[0030] Furthermore, the transport component includes an outer tube movably connected to the second chamber and connected to the second bevel gear, an inner tube disposed in the second chamber, a mounting rod located in the outer tube, a sealing block disposed at one end of the mounting rod, a support spring for connecting the sealing block and the outer tube, and a blocking block disposed at the other end of the mounting rod;

[0031] The outer tube abuts against the inner tube, and the outer tube is provided with a first inlet and a second inlet respectively;

[0032] The inner tube is also provided with a third inlet.

[0033] Beneficial Effects: This invention discloses an adjustable vacuum valve with a self-locking function. To enable the vacuum valve to self-lock, the device is equipped with an air inlet and an air outlet. Air is injected into the housing through the air inlet and outlet, thereby activating the self-locking component. This causes the return spring to deform, moving the locking block away from the piston and allowing the locking block to be positioned in the chuck, thus completing the self-locking operation of the chuck. Simultaneously, during the inflation process, the moving piston drives the chuck and piston rod to move, which in turn drives the bellows sleeve to move via the drive spring. This allows the valve stem to extend out of the mounting seat, bringing the valve plate into contact with the vacuum chamber. During the movement of the valve stem, the drive wheel also moves on the drive block, causing the valve plate to swing, generating a certain compressive force between it and the vacuum chamber, thereby sealing the vacuum chamber and ensuring the formation of a vacuum environment. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the adjustable vacuum valve with self-locking function of the present invention;

[0035] Figure 2 This is a cross-sectional view of the adjustable vacuum valve with self-locking function of the present invention;

[0036] Figure 3 This is a schematic diagram of the driving component of the present invention;

[0037] Figure 4 This is a structural diagram of the piston rod of the present invention;

[0038] Figure 5 This is a schematic diagram of the driving block of the present invention;

[0039] Figure 6 This is a schematic diagram of the corrugated sleeve structure of the present invention;

[0040] Figure 7 This is a schematic diagram of the limiting component structure of the present invention;

[0041] Figure 8 This is a schematic diagram of the pressure relief component structure of the present invention;

[0042] Figure 9 This is a schematic diagram of the second protrusion structure of the present invention;

[0043] Figure 10 This is a schematic diagram of the strain gauge structure of the present invention;

[0044] Figure 11 This is a schematic diagram of the limiting tube of the present invention;

[0045] Figure 12 This is a schematic diagram of the reset part structure of the present invention;

[0046] Figure 13 This is a schematic diagram of the compression spring structure of the present invention;

[0047] Figure 14 This is a schematic diagram of the transport component structure of the present invention.

[0048] Reference numerals: 1. Valve plate; 2. Inlet nozzle; 3. Outlet nozzle; 4. Valve stem; 5. Piston; 6. Drive assembly; 61. Chuck; 62. Drive block; 63. Drive wheel; 64. Piston rod; 7. Self-locking assembly; 71. Locking block; 72. Return spring; 73. Drive rod; 74. Limiting tube; 75. Limiting element; 76. Strain gauge; 77. First protrusion; 78. Second protrusion; 79. Reset part; 791. Fixed base; 792. Drive motor; 793. First connecting rod; 794. Second connecting rod; 795. Universal ball; 796. Offset rod; 797. Rotating seat; 798. Rotating ball; 799. Lower pressure plate; 711. Base; 8. Pressure relief assembly; 8 1. First chamber; 82. Second chamber; 83. Support base; 84. Adjusting motor; 85. First bevel gear; 86. Second bevel gear; 87. Transport component; 871. Outer tube; 872. First inlet; 873. Mounting rod; 874. Inner tube; 875. Blocking block; 876. Support spring; 877. Third inlet; 878. Second inlet; 88. Second channel; 89. First channel; 810. Sealing block; 811. Compression spring; 9. Limiting assembly; 91. Drive spring; 92. Corrugated sleeve; 93. Flange; 94. Corrugated pipe; 95. Propulsion wheel; 96. Limiting groove; 10. Mounting base; 11. Pad; 12. Housing. Detailed Implementation

[0049] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0050] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0051] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0052] This invention discloses an adjustable vacuum valve with a self-locking function, see reference. Figures 1-14 ,include:

[0053] A mounting base 10, a housing 12 connected to the mounting base 10, an air inlet 2, an air outlet 3, and a pressure relief assembly 8 respectively disposed on the housing 12, a piston 5 located inside the housing 12 and movably connected to the housing 12, a drive assembly 6 disposed on the piston 5, a valve stem 4 connected to the drive assembly 6, a valve plate 1 connected to the valve stem 4, a pad 11 disposed on the valve plate 1, and a limiting assembly 9 located in the mounting base 10; a predetermined first gap exists between the drive assembly 6 and the inner wall of the housing 12, so as to... The self-locking component 7 is connected to the first gap; air is introduced into the first gap through the air inlet 2 or the air outlet 3 to adjust the air pressure in the housing 12, thereby changing the state of the self-locking component 7 so that it moves closer to or further away from the drive component 6, thus completing the self-locking and unlocking operation of the drive component 6; air is injected into the housing 12 through the air inlet 2 and the air outlet 3, thereby making the self-locking component 7 work, causing the return spring 72 to deform, causing the locking block 71 to move away from the piston 5, so that the locking block 71 can be located in the chuck 61, thus completing the self-locking operation of the chuck 61.

[0054] The drive assembly 6 includes a chuck 61 fixedly mounted on the piston 5, a drive block 62 disposed on the chuck 61, a drive groove on the drive block 62, and a drive wheel 63 located within the drive groove; the drive wheel 63 is connected to the valve stem 4; the chuck 61 has an annular limiting groove in its circumferential direction, and there is a gap between the chuck 61 and the inner wall of the housing 12; the end of the chuck 61 away from the piston 5 is a frustum structure, so that the self-locking assembly 7 can move along the curved surface of the frustum into the annular limiting groove to complete the self-locking of the vacuum valve; the piston 5, the chuck 61, and the drive block 62 are connected by bolts. The drive assembly 6 also includes a piston rod 64 disposed on the chuck 61 and sleeved on the valve rod 4. The piston rod 64 has a convex groove, and the limiting assembly 9 abuts against the shoulder of the groove. The drive groove includes at least two semi-circular through holes of the same size, wherein the connecting line between the centers of the two through holes has a certain angle with the length direction of the drive block 62, and a connecting groove for the free ends of the two semi-circular through holes. By moving the drive wheel 63 in the connecting groove and the semi-circular through holes, the valve rod 4 swings, causing the valve plate 1 to abut against the vacuum chamber and seal the vacuum chamber.

[0055] When the valve stem 4 needs to extend, air is supplied from the air outlet 3. At this time, the piston 5 can move upward and squeeze the area where the self-locking component 7 is located in the housing 12, thereby deforming the self-locking area so that it can pass through the chuck 61 and be located in the annular limiting groove on the chuck 61, thus completing the self-locking effect. Even when the power is off, the valve stem 4 can still be locked. Conversely, air is supplied from the air inlet 2. Then, by changing the air pressure in the housing 12, the self-locking component 7 is deformed and, under the action of air pressure, the self-locking component 7 can move away from the chuck 61. At this time, the valve stem 4 moves downward.

[0056] During the inflation process, the moving piston 5 drives the chuck 61 and piston rod 64 to move, which in turn drives the bellows 92 to move via the drive spring 91. This allows the valve stem 4 to extend out of the mounting seat 10, causing the valve plate 1 to come into contact with the vacuum chamber. Simultaneously, as the valve stem 4 moves, the drive wheel 63 also moves on the drive block 62, causing the valve plate 1 to swing, generating a certain compressive force between it and the vacuum chamber. This completes the sealing of the vacuum chamber and ensures the formation of a vacuum environment.

[0057] The limiting assembly 9 includes a drive spring 91 that abuts against the shoulder of the groove, a bellows sleeve 92 connected to the other end of the drive spring 91 and sleeved on the valve stem 4, a flange 93 fixedly connected to the bellows sleeve 92, a bellows pipe 94 connected to the flange 93, two push wheels 95 symmetrically arranged on the bellows sleeve 92, and a limiting groove 96 provided on the inner wall of the mounting base 10 for the push wheels 95 to move. The limiting groove 96 and the push wheels 95 are provided with a reserved space between the bellows sleeve 92 and the mounting base 10 for the valve stem 4 to swing freely. When the valve stem 4 swings, due to the reserved space, the valve stem 4 can not only move in its length direction, but also drive the piston 5 to swing slightly in the radial direction. Due to the presence of the push wheels 95 and the limiting groove 96, the valve stem 4 can be limited. At the same time, the bellows pipe 94, through its deformation, can seal the mounting base 10.

[0058] The self-locking assembly 7 includes a base 711 fixedly mounted on the housing 12, a return spring 72 located in the base 711, and a T-shaped locking block 71 connected to the return spring 72; the free end of the locking block 71 extends into the housing 12, and the housing 12 is also provided with a transport hole, which is used to transport gas in the housing 12 into the base 711, so that the locking block 71 pushes the return spring 72 to move, changing the position of the locking block 71; when the housing 12 is closed, the locking block 71 can be locked. When the air pressure in part 2 changes, the air pressure can enter the base 711 through the transport hole and abut against the locking block 71, thereby pushing the locking block 71 to move in the base 711, so that the locking block 71 can retract into the base 711 and complete the unlocking work. When air is injected into the housing 12 from the air outlet 3, the piston 5 and the self-locking component 7 are squeezed, causing the self-locking component 7 to deform, so that the self-locking component 7 is locked in the annular limiting groove and completes the limiting work.

[0059] The self-locking assembly 7 further includes a drive rod 73 fixedly installed on the top of the locking block 71, a limiting tube 74 fixedly installed on the base 711, a mounting groove opened on the limiting tube 74, a limiting member 75 movably connected to the mounting groove, a strain gauge 76 fixedly installed in the mounting groove and abutting against the limiting member 75, and a detection part abutting against the strain gauge 76; the reset spring 72 is sleeved on the drive rod 73; the limiting member 75 includes a rod body, a first protrusion 77 and a second protrusion 78 connected to the rod body, wherein there is a predetermined angle between the first protrusion 77 and the second protrusion 78; the second protrusion 78 extends into the limiting tube 74 and abuts against the outer wall of the drive rod 73;

[0060] Under normal circumstances, the limiting tube 74 is equipped with a spring sheet, and the strain gauge 76 is attached to the spring sheet. Since the spring sheet abuts against the limiting member 75, it can make the limiting member 75 abut against the drive rod 73 to complete the limiting work of the drive rod 73. However, when there is a large pressure in the housing 12, the large airflow pressure will cause the locking block 71 to be oblique, which will prevent the locking block 71 from moving away from the piston 5. At this time, the air pump is still charging through the air nozzle, which can easily cause damage to the equipment.

[0061] To solve the above problems, after the locking block 71 tilts, it can drive the drive rod 73 to tilt. Since the drive rod 73 abuts against the limiting member 75, different limiting members 75 can undergo different deformations. Based on the deformation of the drive rod 73 obtained from the limiting member 75, the deformation is then transmitted to the detection unit. The detection unit is existing technology. It detects the tilt of the drive rod 73 by means of a wire and a strain gauge 76 (also known as a metal strain gauge 76) and based on its deformation. Then, it controls the reset unit 79 to move.

[0062] The base 711 is also provided with a reset part 79; the reset part 79 includes a fixed base 791 fixedly installed on the base 711, at least two drive motors 792 connected to the fixed base 791, a first connecting rod 793 connected to the output end of the drive motor 792, a second connecting rod 794 movably connected to the first connecting rod 793, a universal ball 795 movably connected to the fixed base 791, an offset rod 796 connected to the universal ball 795, rotating balls 798 symmetrically arranged at both ends of the offset rod 796, a rotating seat 797 movably connected to the rotating ball 798, and a lower pressure plate 799 connected to one of the rotating seats 797; the other rotating seat 797 is movably connected to the two second connecting rods 794;

[0063] When the reset unit 79 receives the signal from the detection unit, the drive motor 792 starts to work. The moving drive motor 792 can drive the first connecting rod 793 to move, and then the moving first connecting rod 793 can drive the second connecting rod 794 to move. In turn, the moving second connecting rod 794 can drive the rotating seat 797 to move. And through the set rotating ball 798, the offset rod 796 swings around the universal ball 795, so that the lower pressure plate 799 can abut against the locking block 71, thereby preventing one end of the locking block 71 from tilting too high. In the above way, it can be restored to the initial position, avoiding the situation where the locking block 71 is displaced due to excessive air pressure at the beginning of operation, and preventing the locking block 71 from getting stuck and causing a barrel explosion.

[0064] The pressure relief assembly 8 includes a second chamber 82 fixedly mounted on the housing 12, a first chamber 81 fixedly connected to the second chamber 82, a second channel 88 built into the second chamber 82, a first channel 89 connecting the second channel 88 and the first chamber 81, a transport component 87 located in the second channel 88, a compression spring 811 located in the first chamber 81, and a sealing block 810 connected to the compression spring 811 and located in the first chamber 81; the transport component 87 includes a support base 83 fixedly mounted in the second chamber 82, an adjusting motor 84 fixedly connected to the support base 83, a first bevel gear 85 fixedly connected to the adjusting motor 84, and a second bevel gear meshing with the first bevel gear 85. 86, and a transport component 87 connected to the second bevel gear 86; the transport component 87 includes an outer tube 871 movably connected to the second chamber 82 and connected to the second bevel gear 86, an inner tube 874 disposed in the second chamber 82, a mounting rod 873 located in the outer tube 871, a sealing block 810 disposed at one end of the mounting rod 873, a support spring 876 for connecting the sealing block 810 and the outer tube 871, and a blocking block 875 disposed at the other end of the mounting rod 873; the mounting rod 873 is movably connected to the sealing block 810; the outer tube 871 abuts against the inner tube 874, and the outer tube 871 is respectively provided with a first inlet 872 and a second inlet 878; the inner tube 874 is also provided with a third inlet 877;

[0065] The detection unit can also drive the pressure relief assembly 8 to start working. When the drive rod 73 is detected to be tilted, the adjustment motor 84 starts working. The moving adjustment motor 84 can drive the first bevel gear 85 to move. Then the moving first bevel gear 85 can drive the second bevel gear 86 to move. At this time, the second bevel gear 86 can drive the outer tube 871 to rotate, so that the first inlet 872 is connected to the first channel 89 and the second inlet 878 is connected to the second channel 88. At this time, the gas can enter the first channel 89 through the second channel 88 and be located in the first chamber 81. At this time, the gas can push the sealing block 810 to move in the first chamber 81. After the reset unit 79 completes the reset work of the locking block 71, the adjustment motor 84 works in reverse, which can make the outer tube 871 move in reverse, cutting off the airflow transport channel. Then, by using the L-shaped venting rod, the blocking block 875 is moved away from the inner tube 874. At this time, under the drive of the compression spring 811, the gas in the first chamber 81 can be discharged, completing the pressure relief work.

[0066] Working principle description: When the valve stem 4 needs to extend, air is supplied from the air outlet 3. At this time, the piston 5 can move upward and squeeze the area where the self-locking component 7 is located in the housing 12, thereby deforming the self-locking area so that it can pass through the chuck 61 and be located in the annular limiting groove on the chuck 61, thus completing the self-locking effect. Even when the power is off, the valve stem 4 can still be locked. Conversely, air is supplied from the air inlet 2. Then, by changing the air pressure in the housing 12, the self-locking component 7 is deformed and under the action of air pressure, the self-locking component 7 can move away from the chuck 61, at which time the valve stem 4 moves downward.

[0067] During inflation, the moving piston 5 drives the chuck 61 and piston rod 64 to move, which in turn drives the bellows 92 to move via the drive spring 91. This allows the valve rod 4 to extend out of the mounting seat 10, causing the valve plate 1 to abut against the vacuum chamber. Simultaneously, as the valve rod 4 moves, the drive wheel 63 also moves on the drive block 62, causing the valve plate 1 to swing, generating a certain compressive force between it and the vacuum chamber. When the valve rod 4 swings, due to the reserved space, the valve rod 4 can not only move in its length direction but also drive the piston 5 to swing slightly radially.

[0068] When the air pressure in the housing 12 changes, the air pressure can enter the base 711 through the transport hole and abut against the locking block 71, thereby pushing the locking block 71 to move in the base 711, so that the locking block 71 can retract into the base 711 and complete the unlocking work. When the air outlet 3 is used to inflate the housing 12, the piston 5 and the self-locking component 7 are squeezed to deform the self-locking component 7, so that the self-locking component 7 is locked in the annular limiting groove and completes the limiting work.

[0069] After the locking block 71 tilts, it can drive the drive rod 73 to tilt. Since the drive rod 73 abuts against the limiting member 75, different limiting members 75 can deform in different ways. Based on the deformation of the drive rod 73 obtained by the limiting member 75, the deformation is then transmitted to the detection unit, and the detection unit controls the reset unit 79 to move.

[0070] When the reset unit 79 receives the signal from the detection unit, the drive motor 792 starts to work. The moving drive motor 792 can drive the first link 793 to move. Then the moving first link 793 can drive the second link 794 to move. In turn, the moving second link 794 can drive the rotating seat 797 to move. And through the set rotating ball 798, the offset rod 796 swings around the universal ball 795, so that the lower pressure plate 799 can abut against the locking block 71, thereby preventing one end of the locking block 71 from tilting too high.

[0071] The detection unit can also drive the pressure relief assembly 8 to start working. When the drive rod 73 is detected to be tilted, the adjustment motor 84 starts working. The moving adjustment motor 84 can drive the first bevel gear 85 to move. Then the moving first bevel gear 85 can drive the second bevel gear 86 to move. At this time, the second bevel gear 86 can drive the outer tube 871 to rotate, so that the first inlet 872 is connected to the first channel 89 and the second inlet 878 is connected to the second channel 88. At this time, the gas can enter the first channel 89 through the second channel 88 and be located in the first chamber 81. At this time, the gas can push the sealing block 810 to move in the first chamber 81. After the reset unit 79 completes the reset work of the locking block 71, the adjustment motor 84 works in reverse, which can make the outer tube 871 move in reverse, cut off the airflow transport channel. Then, by using the L-shaped venting rod, the blocking block 875 is moved away from the inner tube 874. At this time, under the drive of the compression spring 811, the gas in the first chamber 81 can be discharged.

[0072] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. An adjustable vacuum valve with a self-locking function, characterized in that, include: Mounting base (10), housing (12) connected to the mounting base (10), air inlet (2), air outlet (3) and pressure relief assembly (8) respectively provided on the housing (12); piston (5) located inside the housing (12) and movably connected to the housing (12), drive assembly (6) provided on the piston (5), valve stem (4) connected to the drive assembly (6), valve plate (1) connected to the valve stem (4), pad (11) provided on the valve plate (1), and limiting assembly (9) located in the mounting base (10); There is a predetermined first gap between the drive assembly (6) and the inner wall of the housing (12), and a self-locking assembly (7) communicating with the first gap. By inflating or deflating the first gap through the air inlet (2) or air outlet (3), the air pressure inside the housing (12) is adjusted, thereby changing the state of the self-locking component (7) so that it moves closer to or further away from the drive component (6), thus completing the self-locking and unlocking of the drive component (6).

2. The adjustable vacuum valve with self-locking function according to claim 1, characterized in that: The drive assembly (6) includes a chuck (61) fixedly mounted on the piston (5), a drive block (62) disposed on the chuck (61), a drive groove provided on the drive block (62), and a drive wheel (63) located in the drive groove. The drive wheel (63) is connected to the valve stem (4); The chuck (61) is provided with an annular limiting groove in the circumferential direction. There is a gap between the chuck (61) and the inner wall of the housing (12). The end of the chuck (61) away from the piston (5) is a frustum structure, so that the self-locking component (7) can move along the curved surface of the frustum to the annular limiting groove to complete the self-locking of the vacuum valve. The piston (5), chuck (61) and drive block (62) are connected by bolts to form an integrated structure.

3. The adjustable vacuum valve with self-locking function according to claim 2, characterized in that: The drive assembly (6) further includes a piston rod (64) disposed on the chuck (61) and sleeved on the valve rod (4), wherein a U-shaped groove is provided in the piston rod (64), and the limiting assembly (9) abuts against the shoulder of the groove; The drive groove includes at least two semi-circular through holes of the same size, wherein there is a certain angle between the connecting line between the centers of the two through holes and the length direction of the drive block (62), and a connecting groove for the free ends of the two semi-circular through holes. By moving the drive wheel (63) in the connecting groove and the semi-circular through holes, the valve stem (4) swings, causing the valve plate (1) to abut against the vacuum chamber and seal the vacuum chamber.

4. The adjustable vacuum valve with self-locking function according to claim 3, characterized in that: The limiting assembly (9) includes a drive spring (91) that abuts against the shoulder of the groove, a bellows sleeve (92) connected to the other end of the drive spring (91) and sleeved on the valve stem (4), a flange (93) fixedly connected to the bellows sleeve (92), a bellows pipe (94) connected to the flange (93), two push wheels (95) symmetrically arranged on the bellows sleeve (92), and a limiting groove (96) provided on the inner wall of the mounting base (10) for the push wheels (95) to move. The limiting groove (96) and the propulsion wheel (95) are provided with a reserved space between the corrugated sleeve (92) and the mounting base (10) for the valve stem (4) to swing freely.

5. The adjustable vacuum valve with self-locking function according to claim 4, characterized in that: The self-locking assembly (7) includes a base (711) fixedly mounted on the housing (12), a return spring (72) located in the base (711), and a T-shaped locking block (71) connected to the return spring (72). The free end of the locking block (71) extends into the housing (12). The housing (12) is also provided with a transport hole, which is used to transport the gas in the housing (12) to the base (711) so that the locking block (71) pushes the return spring (72) to move and change the position of the locking block (71).

6. The adjustable vacuum valve with self-locking function according to claim 5, characterized in that: The self-locking assembly (7) further includes a drive rod (73) fixedly installed on the top of the locking block (71), a limiting tube (74) fixedly installed on the base (711), a mounting groove opened on the limiting tube (74), a limiting member (75) movably connected to the mounting groove, a strain gauge (76) fixedly installed in the mounting groove and abutting against the limiting member (75), and a detection part abutting against the strain gauge (76); The return spring (72) is sleeved on the drive rod (73).

7. The adjustable vacuum valve with self-locking function according to claim 6, characterized in that: The limiting member (75) includes a rod body, a first protrusion (77) and a second protrusion (78) connected to the rod body, wherein there is a predetermined angle between the first protrusion (77) and the second protrusion (78); The second protrusion (78) extends into the limiting tube (74) and abuts against the outer wall of the drive rod (73).

8. The adjustable vacuum valve with self-locking function according to claim 7, characterized in that: The base (711) is also provided with a reset part (79); The reset part (79) includes a fixed base (791) fixedly mounted on the base (711), at least two drive motors (792) connected to the fixed base (791), a first connecting rod (793) connected to the output end of the drive motor (792), a second connecting rod (794) movably connected to the first connecting rod (793), a universal ball (795) movably connected to the fixed base (791), an offset rod (796) connected to the universal ball (795), a rotating ball (798) symmetrically arranged at both ends of the offset rod (796), a rotating seat (797) movably connected to the rotating ball (798), and a lower pressure plate (799) connected to one of the rotating seats (797). Another rotating seat (797) is movably connected to two second links (794).

9. The adjustable vacuum valve with self-locking function according to claim 8, characterized in that: The pressure relief assembly (8) includes a second chamber (82) fixedly mounted on the housing (12), a first chamber (81) fixedly connected to the second chamber (82), a second channel (88) built into the second chamber (82), a first channel (89) for connecting the second channel (88) and the first chamber (81), a transport component (87) located in the second channel (88), a compression spring (811) located in the first chamber (81), and a sealing block (810) connected to the compression spring (811) and located in the first chamber (81). The transport component (87) includes a support base (83) fixedly installed in the second chamber (82), an adjustment motor (84) fixedly connected to the support base (83), a first bevel gear (85) fixedly connected to the adjustment motor (84), a second bevel gear (86) meshing with the first bevel gear (85), and a transport component (87) connected to the second bevel gear (86).

10. The adjustable vacuum valve with self-locking function according to claim 9, characterized in that: The transport component (87) includes an outer tube (871) movably connected to the second chamber (82) and connected to the second bevel gear (86), an inner tube (874) disposed in the second chamber (82), a mounting rod (873) located in the outer tube (871), a sealing block (810) disposed at one end of the mounting rod (873), a support spring (876) for connecting the sealing block (810) and the outer tube (871), and a blocking block (875) disposed at the other end of the mounting rod (873). The outer tube (871) abuts against the inner tube (874), and the outer tube (871) is provided with a first inlet (872) and a second inlet (878). The inner tube (874) is also provided with a third inlet (877).

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