A tightening device for assembling a gas pressure reducing valve

Abstract

The present invention relates to the technical field of valve auxiliary assembly equipment, and specifically to a tightening equipment for assembling a gas pressure reducing valve, and comprises a machine base, a positioning mechanism, a rotating block, a chuck, a moving mechanism and an adjusting mechanism, wherein the positioning mechanism is used to fix the valve seat on the machine base; the rotating block is located in the extension direction of the interface and can rotate on its own; one end of the chuck is hinged on the rotating block, and the other end is suspended, there are two chucks, and they have a first state and a second state, and the adjusting mechanism is used to adjust the working state of the chuck; when the valve seat and the gas connector are placed, the two chucks together form an "eight"-shaped structure, and when clamping a screwing part, the two chucks together form a "two"-shaped structure; the chuck comprises a clamping block, the clamping block has a clamping surface, the clamping block can revolve so that the clamping surface and the screwing surface are arranged to overlap, and the moving mechanism adjusts the distance between the two clamping blocks in direct proportion to the rotation angle of the clamping block to clamp the screwing part, thereby ensuring assembly efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of valve component auxiliary assembly equipment, in particular to a tightening device for assembling a gas pressure reducing valve. Background Art

[0002] A gas pressure reducing valve is a valve device that reduces the inlet pressure to a required outlet pressure through regulation and automatically maintains a stable outlet pressure by relying on the energy of the medium itself. It is mainly used in gas pipeline systems to accurately control the gas pressure and ensure that the system operates at an appropriate pressure.

[0003] A common gas pressure reducing valve includes a valve seat, a valve core, an instrument panel and a gas connector, etc. When assembling the various components of the gas pressure reducing valve, assembly equipment is usually required. In the related technology, for example, Chinese patent CN219599431U discloses a processing tool for an air pressure reducing valve. When the processing tool for the air pressure reducing valve is in use, a worker can manually turn a turntable to rotate the bidirectional screw rod inside the clamping disk. When the bidirectional screw rod rotates inside the clamping disk, the fixing blocks are brought close to each other inside. By fixing the top surface of the fixing block to the bottom surface of the clamping pliers, the air pressure reducing valve body is clamped and fixed by the clamping pliers that are close to each other, which facilitates workers to clamp air pressure reducing valve bodies of different sizes.

[0004] When the existing valve assembly equipment assembles the valve seat and gas connector of the gas pressure reducing valve, due to the special structure of the gas connector, it is generally necessary to manually pre-tighten the gas connector on the valve seat first, and then put the valve seat and the gas connector as a whole into the valve assembly equipment for mechanical tightening. Due to the uncertainty of the number of tightening turns during manual pre-tightening, the screwing surface of the pre-tightened gas connector cannot always remain vertical. As a result, when the chuck of the valve assembly equipment clamps the screwing surface of the gas connector, the screwing surface of the chuck and the gas connector cannot maintain surface contact. If no adjustment is made, the problem of inadequate clamping will occur, which will affect the assembly accuracy; if adjustment is made, it is necessary to first reset the valve assembly equipment, then remove the valve seat and the gas connector as a whole from the valve assembly equipment, then adjust the number of screwing turns of the gas connector, and then put the valve seat and the gas connector as a whole into the valve assembly equipment for mechanical tightening, which leads to low assembly efficiency and affects the production efficiency of the gas pressure reducing valve. Summary of the invention

[0005] Based on this, it is necessary to provide a tightening device for assembling a gas pressure reducing valve in order to solve the problems of low assembly precision and low assembly efficiency in the current gas pressure reducing valve assembly process.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A tightening device for assembling a gas pressure reducing valve, the tightening device for assembling a gas pressure reducing valve is used to assemble a valve seat and a gas connector of the gas pressure reducing valve, the valve seat has an interface, the gas connector has a screwing portion, and the screwing portion has at least two screwing surfaces arranged opposite to each other;

[0008] The tightening device for assembling the gas pressure reducing valve comprises:

[0009] A machine base, wherein an assembly station is arranged on the machine base, and the valve seat is located at the assembly station during assembly;

[0010] a positioning mechanism, the positioning mechanism being configured to fix the valve seat at the assembly station;

[0011] A rotating block, arranged on the base and located in the extension direction of the interface, the rotating block can rotate around a first axis, and the first axis coincides with the extension direction of the interface;

[0012] A chuck, one end of which is hinged on the rotating block, and the other end is suspended; there are two chucks, which are symmetrically arranged on both sides of the screwing part; the two chucks are configured to have a first state and a second state according to the assembly situation, and when the valve seat and the gas connector are placed, the two chucks are in the first state, and the two chucks together form an "eight"-shaped structure to make way for the gas connector; when clamping the screwing part, the two chucks are in the second state, and the two chucks together form a "two"-shaped structure to clamp on the two oppositely arranged screwing surfaces respectively; a clamping block is arranged on the chuck, and the clamping block has a clamping surface, and the clamping block can revolve around a second axis so that the clamping surface is parallel to the screwing surface, and the second axis is arranged in parallel to the first axis;

[0013] A moving mechanism, wherein the moving mechanism is configured to adjust the distance between the two clamping blocks in direct proportion to the rotation angle of the clamping blocks, so as to clamp the screwing portion;

[0014] The adjusting mechanism is configured to adjust the two chucks to switch between the first state and the second state.

[0015] Furthermore, the chuck is also provided with a mounting seat and a rotating frame, the mounting seat is provided with an open circular groove, the second axis coincides with the center of the circle of the open circular groove; the rotating frame is slidably inserted in the open circular groove, and the clamping block is sleeved on the rotating frame; the moving mechanism includes two moving components, the moving components and the chuck are correspondingly arranged, the moving components include a pressing sheet, a liquid capsule, a liquid pipe, a screw, a sensing part and an adjusting part, the pressing sheet is fixedly arranged on the rotating frame; the liquid capsule is filled with a first hydraulic fluid, the number of the liquid capsules is two, and the two liquid The capsules are arranged on the mounting seat and are symmetrically arranged on both sides of the pressing plate; the liquid pipe connects the two liquid capsules; one end of the screw is rotatably arranged on the mounting seat, and the other end is spirally inserted on the chuck; the sensing part is configured to sense the amount of the first hydraulic fluid exchanged between the two liquid capsules; the adjusting part is configured to proportionally adjust the number of rotations of the screw according to the amount of the first hydraulic fluid exchanged between the two liquid capsules sensed by the sensing part, so that the screw drives the clamping block to move in a direction close to the screwing part through the mounting seat.

[0016] Furthermore, the regulating part includes a liquid chamber, a partition plate and a fluid replenisher, the liquid chamber is arranged on the mounting seat, and the liquid chamber is filled with a second hydraulic fluid; the partition plate is fixedly arranged on the screw rod, and divides the liquid chamber into a first sub-chamber and a second sub-chamber that are not connected to each other; the fluid replenisher is connected to the first sub-chamber and the second sub-chamber at the same time, and is configured to be able to fill the second hydraulic fluid into the first sub-chamber and recover the second hydraulic fluid in the second sub-chamber, or fill the second hydraulic fluid into the second sub-chamber and recover the second hydraulic fluid in the first sub-chamber.

[0017] Furthermore, there are multiple clamping surfaces on the clamping block, and the multiple clamping surfaces are arranged along the circumferential direction; the tightening equipment for assembling the gas pressure reducing valve also includes a switching mechanism, and the switching mechanism is configured to be able to switch between different clamping surfaces.

[0018] Furthermore, the switching mechanism includes two switching components, and the switching components and the chuck are arranged correspondingly. The switching components include a spline hole, a slide bar and a locking nut. The spline hole is arranged on the clamping block; the slide bar is arranged on the rotating frame and can be relatively slidably inserted in the spline hole when in use; the locking nut is threadedly sleeved on the rotating frame and pressed on the clamping block when in use.

[0019] Further, the adjustment mechanism includes a torsion spring and a sliding sleeve. There are two torsion springs, which are arranged at the hinge between the chuck and the rotating block. Under the action of the torsion spring, the two chucks tend to remain in the first state; the sliding sleeve is sleeved on the rotating block and forms a spline fit with the rotating block. The sliding sleeve can slide along the extension direction of the interface to form a stop fit with the chuck.

[0020] Furthermore, the tightening device for assembling the gas pressure reducing valve also includes a ball, which is inserted into the sliding sleeve and can roll freely; there are multiple balls, and the multiple balls are divided into two groups. The two groups of balls are respectively arranged on the sliding sleeve and corresponding to the chuck so as to form a rolling fit with the chuck.

[0021] Furthermore, the adjustment mechanism also includes a slide and a rotating wheel, the slide is arranged on the machine base and can slide along the extension direction of the interface; there are four rotating wheels, and the four rotating wheels are divided into two groups, the two groups are symmetrically arranged on the slide and are respectively located on both sides of the sliding sleeve, and the two rotating wheels in the same group frictionally clamp the sliding sleeve.

[0022] Furthermore, the positioning mechanism comprises a pressing frame, which can slide up and down in a vertical direction so as to press on the top of the valve seat when in use.

[0023] Furthermore, the tightening device for assembling the gas pressure reducing valve further comprises a driving member, and the driving member is configured to provide a driving force for the rotating block to rotate around the first axis.

[0024] The beneficial effects of the present invention are:

[0025] When the tightening device for assembling a gas pressure reducing valve provided by the present invention is used, the valve seat is first placed at the assembly station, and then the valve seat is fixed at the assembly station by a positioning mechanism; then the two chucks are adjusted by an adjusting mechanism to switch from a first state to a second state, so that the two chucks together form a "two"-shaped structure, so as to be clamped on two oppositely arranged screwing surfaces respectively; in the process of switching the chuck states, the two chucks approach each other synchronously, and when the clamping block and the screwing part are in contact, as the two chucks continue to approach each other, under the push of the screwing part, the two clamping blocks can both revolve around the second axis so that the clamping surface and the screwing surface are parallel, and at the same time, the moving mechanism adjusts the distance between the two clamping blocks in direct proportion according to the rotation angle of the clamping block so that the clamping surface and the screwing surface coincide, thereby being able to clamp the screwing part; then the rotating block is driven to rotate, and the rotating block synchronously drives the two chucks to rotate, and the two chucks simultaneously drive the gas joint to rotate through the clamping block, so as to tighten the gas joint at the interface. By setting the clamping block to be able to revolve around the second axis and the moving mechanism, during use, when the screwing surface of the pre-tightened gas joint is in an inclined state, the clamping surface can be automatically rotated to be parallel to the screwing surface through the revolution of the clamping block, and then the two clamping blocks are driven close to each other through the moving mechanism to be respectively clamped on the two oppositely arranged screwing surfaces, so that the clamping blocks can clamp the screwing surfaces in a surface contact manner, while ensuring stable clamping, both the assembly accuracy and the assembly efficiency can be improved.

[0026] Furthermore, by providing the ball bearings, the friction contact between the sliding sleeve and the chuck is in the form of rolling friction during use, which helps to reduce the wear of the sliding sleeve and the chuck and avoid affecting the clamping effect due to excessive wear.

[0027] Furthermore, by setting the number of clamping surfaces on the clamping block to be multiple and a switching mechanism, during use, after the current clamping surface has been used for a certain period of time, the next clamping surface can be switched through the switching mechanism. While ensuring the clamping effect, it avoids the need to replace the entire chuck due to wear of the clamping surface, which leads to increased use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the three-dimensional structure of the tightening device for assembling a gas pressure reducing valve provided in an embodiment of the present invention when assembling a valve seat and a gas connector;

[0029] Figure 2 A schematic diagram of the front view of the structure of the tightening device for assembling a gas pressure reducing valve provided in an embodiment of the present invention when assembling a valve seat and a gas connector;

[0030] Figure 3 for Figure 2 Middle AA section view;

[0031] Figure 4A schematic diagram of the three-dimensional structure of the chuck, the moving assembly and the switching assembly of the tightening device for assembling a gas pressure reducing valve provided in an embodiment of the present invention during assembly;

[0032] Figure 5 A schematic diagram of the exploded parts of a chuck, a moving assembly and a switching assembly of a tightening device for assembling a gas pressure reducing valve provided in an embodiment of the present invention;

[0033] Figure 6 A bottom view structural schematic diagram of a chuck, a moving assembly and a switching assembly of a tightening device for assembling a gas pressure reducing valve provided in an embodiment of the present invention;

[0034] Figure 7 for Figure 6 Middle BB section view;

[0035] Figure 8 A schematic diagram of the top view of the structure of a chuck, a moving assembly and a switching assembly of a tightening device for assembling a gas pressure reducing valve provided in an embodiment of the present invention;

[0036] Fig. 9 for Figure 8 Middle CC section view;

[0037] Fig.10 for Fig. 9 Schematic diagram of the local enlarged structure at point D in the middle.

[0038] in:

[0039] 1. Machine base; 11. Fixing table; 111. Positioning slot; 12. Stand; 13. Stand plate; 14. Driving motor;

[0040] 2. Positioning mechanism; 21. Pressing frame; 22. Second driving cylinder;

[0041] 3. Rotate the block;

[0042] 4. chuck; 401. hinge hole; 402. mounting ring; 41. clamping block; 42. mounting seat; 421. open circular groove; 43. rotating frame;

[0043] 511, tablet pressing; 512, liquid capsule; 513, liquid tube; 514, screw; 515, sensing part; 5161, liquid cavity; 5162, separator; 5163, liquid replenisher;

[0044] 61. sliding sleeve; 62. carriage; 63. rotating wheel;

[0045] 71, switching assembly; 711, spline hole; 712, slide bar; 713, locking nut;

[0046] 8. Valve seat;

[0047] 9. gas connector; 91. screwing portion; 911. screwing surface. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] like Figures 1 to 10 As shown, the tightening device for assembling a gas pressure reducing valve provided in an embodiment of the present invention is used to assemble a valve seat 8 and a gas connector 9 of a gas pressure reducing valve. The valve seat 8 has an interface, and the gas connector 9 has a screwing portion 91. The screwing portion 91 has at least two screwing surfaces 911 arranged opposite to each other.

[0052] Specifically in this embodiment, Figure 3As shown, the valve seat 8 is configured as a disc-shaped structure, and a connecting pipe is fixedly arranged on the top of the valve seat 8. The connecting pipe extends in the radial direction of the valve seat 8. The number of connecting pipes can be four and are arranged at intervals along the circumferential direction, and an interface is formed at the connecting pipe; the gas connector 9 is configured as a tubular structure and has a first externally threaded pipe section and a second externally threaded pipe section. The first externally threaded pipe section is threadedly inserted into the interface during installation, and the screwing portion 91 is located between the first threaded pipe section and the second threaded pipe section and is shaped like a nut. The shape of the screwing portion 91 can be configured as a regular hexagonal prism to have six screwing surfaces 911.

[0053] The tightening equipment for assembling a gas pressure reducing valve is provided to include a machine base 1, a positioning mechanism 2, a rotating block 3, a chuck 4, a moving mechanism and an adjusting mechanism, wherein an assembly station is provided on the machine base 1, and the valve seat 8 is located at the assembly station during assembly; the positioning mechanism 2 is configured to fix the valve seat 8 at the assembly station; the rotating block 3 is provided on the machine base 1 and is located in the extension direction of the interface, the rotating block 3 can rotate around a first axis, and the first axis coincides with the extension direction of the interface; one end of the chuck 4 is hinged on the rotating block 3, and the other end is suspended; there are two chucks 4, and the two chucks 4 are symmetrically arranged on both sides of the screwing portion 91; the two chucks 4 are configured to have a first state and a second state according to the assembly situation, and when the valve seat 8 and the gas connector 9 are placed, the two chucks 4 are in a first state and a second state. The head 4 is in the first state, and the two chucks 4 together form an "eight"-shaped structure to make way for the gas connector 9; when clamping the screwing part 91, the two chucks 4 are in the second state, and the two chucks 4 together form an "two"-shaped structure to clamp on two oppositely arranged screwing surfaces 911 respectively; a clamping block 41 is provided on the chuck 4, and the clamping block 41 has a clamping surface, and the clamping block 41 can revolve around the second axis so that the clamping surface and the screwing surface 911 are parallel, and the second axis and the first axis are arranged in parallel; the moving mechanism is configured to be able to adjust the distance between the two clamping blocks 41 in direct proportion to the rotation angle of the clamping block 41 to clamp the screwing part 91; the adjusting mechanism is configured to be able to adjust the two chucks 4 to switch between the first state and the second state.

[0054] Specifically in this embodiment, Figure 1 As shown, the base 1 is set as a plate-like structure, and the shape is set to be rectangular, and the plate surface is set horizontally when in use; a fixing platform 11 is fixedly set on the top of the rear side of the base 1, and a positioning groove 111 is opened on the top of the fixing platform 11, as shown in FIG. Figure 3 As shown, the positioning groove 111 is arranged in a “cross”-shaped structure, and an assembly station is formed at the positioning groove 111 .

[0055] The first axis coincides with the axis of the pipe; Figure 1 As shown, the rotating block 3 is set as a T-shaped structure, and has a column section and a block section arranged vertically, wherein the axis of the column section coincides with the first axis, and the block section is located at the rear side of the column section; Figure 4As shown, the clamp 4 is configured as an L-shaped block structure, such as Figure 1 As shown, the chuck 4 is arranged to be suspended at the rear end during installation, and the front end is hinged to the rear end of the block section of the rotating block 3; in order to facilitate the articulation with the rotating block 3, as shown in FIG. Figure 4 As shown, a hinge hole 401 is provided at the top of the front end of the chuck 4, and two hinge columns are vertically arranged at the front end of the block section of the rotating block 3. The two hinge columns are arranged at intervals along the width direction of the machine base 1 and are symmetrically arranged. The hinge columns are rotated and inserted into the hinge hole 401 during installation.

[0056] like Figure 3 As shown, at this time, the two clamps 4 are in the second state, and the two clamps 4 are arranged in parallel to facilitate clamping the screwing portion 91.

[0057] Initially, the two clamps 4 are in the first state, and the two clamps 4 together form an "eight"-shaped structure to make way for the gas connector 9.

[0058] When in use, first manually tighten the first external threaded pipe section of the gas connector 9 to one of the connecting pipes on the valve seat 8; then place the valve seat 8 at the assembly station, and make the gas connector 9 extend along the length direction of the machine base 1; then fix the valve seat 8 at the assembly station by the positioning mechanism 2; then adjust the two clamps 4 from the first state to the second state by the adjustment mechanism, so that the two clamps 4 together form a "two"-shaped structure to be clamped on the two oppositely arranged screwing surfaces 911 respectively; in the process of switching the states of the clamps 4, the two clamps 4 approach each other synchronously, and when the clamping block 41 and the screwing part 91 are in contact, as the two clamps 4 continue to approach each other, under the push of the screwing part 91, the two clamping blocks 41 can both revolve around the second axis so that the clamping surface and the screwing surface 911 are parallel, and at the same time, the moving mechanism adjusts the distance between the two clamping blocks 41 in direct proportion to the rotation angle of the clamping block 41 so that the clamping surface and the screwing surface 911 coincide, thereby being able to clamp the screwing part 91.

[0059] Then the rotating block 3 is driven to rotate, and the rotating block 3 synchronously drives the two clamps 4 to rotate, and the two clamps 4 simultaneously drive the gas connector 9 to rotate through the clamping block 41 to tighten the first external threaded pipe section of the gas connector 9 onto one of the connecting pipes on the valve seat 8.

[0060] In some embodiments, a mounting base 42 and a rotating frame 43 are further provided on the chuck 4. An opening circular groove 421 is provided on the mounting base 42, and the second axis coincides with the center of the opening circular groove 421; the rotating frame 43 is slidably inserted into the opening circular groove 421, and the clamping block 41 is sleeved on the rotating frame 43; the moving mechanism is arranged to include two moving components, the moving components are correspondingly arranged with the chuck 4, and each moving component includes a pressing piece 511, a liquid bag 512, a liquid pipe 513, a screw rod 514, a sensing part 515 and an adjusting part. The pressing piece 511 is fixedly arranged on the rotating frame 43; the liquid bag 512 is filled with a first hydraulic fluid, and the number of the liquid bags 512 is two. The two liquid bags 512 are arranged on the mounting base 42 and symmetrically arranged on both sides of the pressing piece 511; the liquid pipe 513 communicates the two liquid bags 512; one end of the screw rod 514 is rotatably arranged on the mounting base 42, and the other end is helically inserted into the chuck 4; the sensing part 515 is configured to be able to sense the amount of the first hydraulic fluid exchanged between the two liquid bags 512; the adjusting part is configured to be able to proportionally adjust the number of rotation turns of the screw rod 514 according to the amount of the first hydraulic fluid exchanged between the two liquid bags 512 sensed by the sensing part 515, so that the screw rod 514 drives the clamping block 41 to move towards the direction close to the screwing part 91 through the mounting base 42.

[0061] Specifically, in this embodiment, as Figure 4 and Figure 5 shown, the mounting base 42 is arranged in a box structure, and is arranged on the horizontal plane of the left L surface of the chuck 4 and at the rear end of the chuck 4 during installation, and the left side wall of the mounting base 42 is open to facilitate exposing the clamping block 41; for facilitating the installation of the rotating frame 43, the mounting base 42 is arranged in a split structure and is divided into two parts along the front-rear direction, and the two split parts are connected by bolts; the opening circular groove 421 is arranged in a superior arc structure and is shaped like a "C", and the opening circular groove 421 is simultaneously opened on the two split parts of the mounting base 42, and the opening faces the open left side wall of the mounting base 42.

[0062] As Figure 5 shown, the rotating frame 43 is arranged in a "D" shape structure and has a rod section and an arc section. The arc section is slidably inserted into the opening circular groove 421 during installation, and the clamping block 41 is sleeved on the rod section during installation.

[0063] As Figure 5 shown, the plane of the pressing piece 511 is perpendicular to the rod section, the pressing piece 511 is arranged in the middle of the arc section and on the arc surface of the arc section facing the rod section during installation; the two liquid bags 512 are located in the opening circular groove 421 and are symmetrically arranged about the middle of the opening circular groove 421; as Figure 7 shown, the liquid pipe 513 is arranged in a "匚" shape structure and is inserted into one of the split parts of the mounting base 42 during installation. The opening of the liquid pipe 513 faces the liquid bag 512 and is simultaneously communicated with the two liquid bags 512.

[0064] like Figure 5 As shown, the screw rod 514 is arranged as a T-shaped structure and is arranged horizontally when in use. The head of the screw rod 514 is inserted into the two split parts of the mounting seat 42 at the same time during installation, and the extension direction of the screw rod 514 passes through the middle of the open circular groove 421; in order to facilitate the spiral fit with the screw rod 514, a mounting ring 402 is vertically arranged on the vertical split surface of the left L surface of the chuck 4, and the right end of the screw rod 514 is spirally inserted into the mounting ring 402 during installation.

[0065] More specifically, the first hydraulic fluid may be configured as hydraulic oil.

[0066] When the screwing surface 911 of the pre-tightened gas connector 9 is in an inclined state, in the process of switching the state of the chuck 4, the two chucks 4 are synchronously close to each other. When the clamping block 41 and the screwing portion 91 are in contact, due to the non-parallelism of the clamping surface and the screwing surface 911, as the two chucks 4 continue to approach each other, under the push of the screwing portion 91, the clamping block 41 synchronously drives the rotating frame 43 to slide in the open circular groove 421 until the clamping surface and the screwing surface 911 are parallel; in the process of the sliding of the rotating frame 43, the rotating frame 43 synchronously drives the pressing piece 511 to slide, so that there must be a liquid capsule 512 in The volume of the pressing plate 511 becomes smaller under the pushing, so that the first hydraulic fluid therein can enter into the other liquid bag 512 through the liquid pipe 513, thereby increasing its volume; during the flow of the first hydraulic fluid, the sensing part 515 can synchronously sense the amount of the first hydraulic fluid flowing; then the adjusting part can proportionally adjust the number of rotations of the screw 514 according to the amount of the first hydraulic fluid flowing sensed by the sensing part 515, so that the screw 514 drives the clamping block 41 to move toward the direction close to the screwing part 91 through the mounting seat 42, thereby clamping the screwing part 91 through the two clamping blocks 41.

[0067] In a further embodiment, the regulating portion is configured to include a liquid chamber 5161, a partition plate 5162 and a fluid replenisher 5163, the liquid chamber 5161 being disposed on the mounting seat 42, and the liquid chamber 5161 being filled with a second hydraulic fluid; the partition plate 5162 being fixedly disposed on the screw 514, and dividing the liquid chamber 5161 into a first sub-chamber and a second sub-chamber that are not connected to each other; the fluid replenisher 5163 is connected to the first sub-chamber and the second sub-chamber at the same time, and is configured to be able to fill the second hydraulic fluid into the first sub-chamber and recover the second hydraulic fluid in the second sub-chamber, or to fill the second hydraulic fluid into the second sub-chamber and recover the second hydraulic fluid in the first sub-chamber.

[0068] Specifically in this embodiment, Fig.10As shown, the liquid chamber 5161 is configured as a circular structure and is simultaneously opened on two split parts of the mounting seat 42. When installed, the head of the screw 514 is coaxially inserted in the liquid chamber 5161. A baffle is provided on the circumferential side wall of the liquid chamber 5161. The baffle extends in the radial direction of the liquid chamber 5161 and abuts against the circumferential side wall of the head of the screw 514. The partition plate 5162 extends in the radial direction of the screw 514 and abuts against the circumferential side wall of the liquid chamber 5161 to divide the liquid chamber 5161 into a first sub-chamber and a second sub-chamber in the shape of a fan ring.

[0069] More specifically, the second hydraulic fluid may be provided as hydraulic oil.

[0070] like Fig.10 As shown, taking the partial liquid chamber 5161 in the shape of a small fan ring as the first sub-chamber and the partial liquid chamber 5161 in the shape of a large fan ring as the second sub-chamber as an example, when the sensing part 515 senses the amount of the first hydraulic fluid flowing, it sends a signal to the fluid replenisher 5163, and the fluid replenisher 5163 transports the second hydraulic fluid in the second sub-chamber to the first sub-chamber, and under the hydraulic push, the screw 514 rotates synchronously in the clockwise direction to screw out the mounting ring 402, and then drives the clamping block 41 to move toward the direction close to the gas connector 9 through the mounting seat 42.

[0071] After assembly is completed, the fluid replenisher 5163 transports the second hydraulic fluid in the first sub-chamber back to the second sub-chamber, and the screw 514 rotates synchronously in the counterclockwise direction under the hydraulic jacking to screw into the mounting ring 402, and then drives the clamping block 41 to move away from the gas connector 9 through the mounting seat 42 to achieve resetting.

[0072] The method of using the partial liquid cavity 5161 in the shape of a small fan ring as the second sub-cavity and the partial liquid cavity 5161 in the shape of a large fan ring as the first sub-cavity is the same as the above method and will not be repeated.

[0073] In other embodiments, the sensing portion 515 may be configured to include a hydraulic sensor disposed on the liquid pipe 513. The hydraulic sensor can measure pressure changes and infer the flow of the liquid by analyzing the pressure changes, thereby obtaining the amount of flow of the first hydraulic fluid.

[0074] In other embodiments, the sensing portion 515 may also be configured to include a displacement sensor; specifically, the displacement sensor may be installed on the liquid capsule 512 to monitor its deformation during compression and expansion; when one liquid capsule 512 is compressed, the other liquid capsule 512 will expand, and this deformation may be measured by the displacement sensor, which will record the displacement change of the liquid capsule 512, thereby reflecting the amount of movement of the first hydraulic fluid between the two liquid capsules 512, and further deriving the amount of flow of the first hydraulic fluid.

[0075] In other embodiments, the sensing portion 515 may also be configured to include a hydraulic sensor and a displacement sensor, so that when in use, the data of the displacement sensor and the hydraulic sensor can be combined to more accurately measure and analyze the amount of liquid movement between the two liquid sacs 512 .

[0076] In other embodiments, the adjustment mechanism is configured to include a torsion spring and a sliding sleeve 61. There are two torsion springs, which are arranged at the hinge of the chuck 4 and the rotating block 3. Under the action of the torsion spring, the two chucks 4 tend to remain in the first state; the sliding sleeve 61 is sleeved on the rotating block 3 and forms a spline fit with the rotating block 3. The sliding sleeve 61 can slide along the extension direction of the interface to form a stop fit with the chuck 4.

[0077] Specifically in this embodiment, Figure 1 As shown, the sliding sleeve 61 is sleeved on the block segment of the rotating block 3 during installation, and forms a spline fit with the block segment, so that it can synchronously follow the rotation of the rotating block 3 and slide relative to the rotating block 3 along the extension direction of the interface.

[0078] In order to facilitate the stop cooperation between the chuck 4 and the sliding sleeve 61, a sliding protrusion is inserted on the vertical dividing plane of the outer L-shaped surface of the chuck 4, and the sliding protrusion is extended along the length direction of the machine base 1. A sliding groove is opened on the inner peripheral wall of the sliding sleeve 61, and the sliding groove extends along the length direction of the machine base 1 and passes through the two end surfaces of the sliding sleeve 61. There are two sliding grooves, and the two sliding grooves are symmetrically arranged; the sliding protrusion is slidably inserted in the sliding groove when in use.

[0079] Initially, the two clamps 4 are in the first state, and the two clamps 4 together form an "eight"-shaped structure.

[0080] In the process of adjusting the two chucks 4 from the first state to the second state, the sliding sleeve 61 is driven to move along the extension direction of the interface and in the direction close to the gas connector 9. As the sliding sleeve 61 moves, the chuck 4 is pushed by the inner wall of the sliding sleeve 61 and swings around the hinge point in the direction close to the gas connector 9 until the two chucks 4 are parallel. During the swinging process of the chuck 4, the torsion spring gradually accumulates force.

[0081] After the assembly is completed, the sliding sleeve 61 is driven to move along the extension direction of the interface and away from the gas connector 9. As the sliding sleeve 61 moves, the chuck 4 swings around the hinge point away from the gas connector 9 under the action of the torsion spring to achieve reset.

[0082] In a further embodiment, when the existing sliding sleeve 61 changes the state of the chuck 4, the contact mode between the sliding sleeve 61 and the chuck 4 is sliding friction of the slide rail type. After long-term operation, the contact surfaces of the sliding sleeve 61 and the chuck 4 will be severely worn, resulting in loose and unstable clamping, and further affecting the tightening effect. To solve this problem, the tightening device for assembling the gas pressure reducing valve is further provided with balls. The balls are inserted into the sliding sleeve 61 and can roll freely. The number of balls is multiple, and the multiple balls are evenly divided into two groups. The two groups of balls are respectively arranged on the sliding sleeve 61 and are arranged corresponding to the chuck 4 so as to form a rolling fit with the chuck 4.

[0083] Specifically in this embodiment, when the same group of balls are installed, they are inserted into the same chute on the sliding sleeve 61. The multiple balls in the same group are arranged at intervals along the extending direction of the chute, and the balls can roll freely.

[0084] Exemplarily, the number of balls can be set to sixteen. The sixteen balls are evenly divided into two groups, and each group includes eight balls. When the eight balls in the same group are installed, they are inserted into the same chute on the sliding sleeve 61. The multiple balls in the same group are arranged at intervals along the extending direction of the chute.

[0085] During use, the arrangement of the balls makes the friction contact form between the sliding sleeve 61 and the chuck 4 be rolling friction, which is beneficial to reducing the wear of the sliding sleeve 61 and the chuck 4 and avoiding affecting the clamping effect due to excessive wear.

[0086] In other embodiments, to facilitate driving the sliding sleeve 61 to slide along the extending direction of the interface, the adjusting mechanism is further provided with a carriage 62 and a runner 63. The carriage 62 is arranged on the machine base 1 and can slide along the extending direction of the interface. The number of runners 63 is four, and the four runners 63 are evenly divided into two groups. The two groups are symmetrically arranged on the carriage 62 and are respectively located on both sides of the sliding sleeve 61. The two runners 63 in the same group frictionally clamp the sliding sleeve 61.

[0087] Specifically in this embodiment, as Figure 1 shown, the carriage 62 is arranged in a "C" - shaped structure with the opening facing upwards. The axis of the runner 63 extends along the width direction of the machine base 1. When the runner 63 is installed, it is arranged on the inner surface of the suspended end of the carriage 62. The two runners 63 in the same group are arranged at intervals along the length direction of the machine base 1. The sliding sleeve 61 is arranged in a "cross" - shaped structure. The two runners 63 in the same group respectively frictionally clamp on both sides of the annular protrusion of the sliding sleeve 61, so as to both support the sliding sleeve 61 and simultaneously drive the sliding sleeve 61 to slide along the extending direction of the interface without interfering with the self - rotation of the sliding sleeve 61.

[0088] More specifically, in order to provide driving force for the slide 62 to slide along the extension direction of the interface, a first driving cylinder is also provided on the base 1 , and the output shaft of the first driving cylinder extends along the length direction of the base 1 and is fixedly provided on the slide 62 .

[0089] It can be understood that the first driving cylinder can be configured as any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0090] Initially, the two clamps 4 are in the first state, and the two clamps 4 together form an "eight"-shaped structure.

[0091] In the process of adjusting the two chucks 4 from the first state to the second state, the first drive cylinder is started, and the output shaft of the first drive cylinder is extended, synchronously driving the slide 62 to move along the extension direction of the interface and in the direction close to the gas connector 9. The slide 62 simultaneously drives the sliding sleeve 61 to move through the clamping of four rotating wheels 63. As the sliding sleeve 61 moves, the chuck 4 is pushed around the hinge point in the direction close to the gas connector 9 by the pushing of the inner circumferential wall of the sliding sleeve 61 until the two chucks 4 are parallel.

[0092] After the assembly is completed, the first drive cylinder is started, and the output shaft of the first drive cylinder is retracted, synchronously driving the slide 62 to move along the extension direction of the interface and away from the gas connector 9. The slide 62 also synchronously drives the sliding sleeve 61 to move through the clamping of the rotating wheel 63 to achieve resetting.

[0093] During the movement of the slide 62 , the clamp 4 is swung around the hinge point in a direction away from the gas connector 9 under the action of the torsion spring to achieve reset.

[0094] In other embodiments, there are multiple clamping surfaces on the clamping block 41, and the multiple clamping surfaces are arranged along the circumferential direction; the tightening device for assembling the gas pressure reducing valve also includes a switching mechanism, and the switching mechanism is configured to be able to switch between different clamping surfaces.

[0095] Specifically in this embodiment, Figure 5 As shown, the clamping block 41 may be configured as a regular hexagonal prism structure to have six clamping surfaces.

[0096] Initially, one of the clamping surfaces of the clamping block 41 is arranged vertically and faces downwardly toward the gas connector 9 .

[0097] During use, after the current clamping surface has been used for a certain period of time, the next clamping surface can be switched through the switching mechanism, which ensures the clamping effect while avoiding the need to replace the entire chuck 4 due to wear of the clamping surface, which would increase the cost of use.

[0098] In a further embodiment, the switching mechanism is configured to include two switching components 71, and the switching components 71 and the chuck 4 are correspondingly arranged. The switching component 71 includes a spline hole 711, a slide bar 712 and a locking nut 713. The spline hole 711 is arranged on the clamping block 41; the slide bar 712 is arranged on the rotating frame 43, and can be relatively slidably inserted in the spline hole 711 when in use; the locking nut 713 is threadedly sleeved on the rotating frame 43, and is pressed on the clamping block 41 when in use.

[0099] Specifically in this embodiment, Figure 5 As shown, the spline hole 711 is opened through the upper and lower end surfaces of the clamping block 41; the slide bar 712 is set as a strip structure, and is set on the circumferential side wall of the rod segment of the rotating frame 43 during installation, and is set close to the bottom, and the extension direction of the slide bar 712 is parallel to the extension direction of the rod segment of the rotating frame 43; an external thread is set on the rod segment of the rotating frame 43, and the external thread is set close to the top, and the locking nut 713 is sleeved on the outside of the external thread during installation.

[0100] When it is necessary to switch the clamping surface, first loosen the locking nut upwards, then drive the clamping block 41 to move upwards until it is disengaged from the slide bar 712, and then rotate the clamping block 41 to switch the clamping surface toward the gas connector 9; then drive the clamping block 41 to move downwards to re-engage with the slide bar 712, and then tighten the locking nut downwards to fix the position of the clamping block 41.

[0101] In other embodiments, the positioning mechanism 2 is configured to include a pressing frame 21, which can slide up and down in a vertical direction so as to be able to press on the top of the valve seat 8 when in use.

[0102] Specifically in this embodiment, Figure 1 As shown, in order to facilitate the installation of the pressing frame 21, a vertical frame 12 is arranged on the top of the base 1, and the vertical frame 12 is arranged at the rear and is located on the right side of the fixed platform 11; the vertical frame 12 is arranged as an inverted "L" shape structure, and the turning section is arranged toward the fixed platform 11, and the pressing frame 21 is slidably arranged on the vertical frame 12 during installation.

[0103] More specifically, in order to provide driving force for the pressing frame 21 to slide, a second driving cylinder 22 is provided at the bottom of the turning section of the vertical frame 12 , and the output shaft of the second driving cylinder 22 is vertically downwardly arranged and fixed to the top of the pressing frame 21 .

[0104] It can be understood that the second driving cylinder 22 can be configured as any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0105] When the valve seat 8 needs to be fixed, the second driving cylinder 22 is started, the output shaft of the second driving cylinder 22 extends, and the pressing frame 21 is simultaneously driven to move downward to press on the top of the valve seat 8 .

[0106] In other embodiments, the tightening device for assembling a gas pressure reducing valve is configured to further include a driving member, and the driving member is configured to provide a driving force for the rotating block 3 to rotate around the first axis.

[0107] Specifically in this embodiment, the driving member can be configured as a driving motor 14, such as Figure 1 As shown, the axis of the motor shaft of the driving motor 14 extends along the length direction of the machine base 1 when it is installed; to facilitate the installation of the driving motor 14, a vertical plate 13 is vertically arranged on the top of the machine base 1, the vertical plate 13 is arranged in the front, and the plate surface of the vertical plate 13 and the plate surface of the machine base 1 are vertically arranged, and the driving motor 14 is fixed on the front plate surface of the vertical plate 13 when it is installed, and the motor shaft of the driving motor 14 passes through the vertical plate 13 and is coaxially inserted on the front end surface of the column section of the rotating block 3.

[0108] When in use, start the drive motor 14, the drive motor 14 drives the rotating block 3 to rotate, the rotating block 3 synchronously drives the two chucks 4 to rotate, and the two chucks 4 simultaneously drive the gas connector 9 to rotate through the clamping block 41 to tighten the gas connector 9 at the interface.

[0109] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows:

[0110] Initially, the two clamps 4 are in the first state, and the two clamps 4 together form an "eight"-shaped structure.

[0111] When in use, first manually tighten the gas connector 9 to the valve seat 8 in advance; then place the valve seat 8 at the assembly station and make the gas connector 9 extend along the length direction of the machine base 1; then start the second drive cylinder 22, and the output shaft of the second drive cylinder 22 extends, synchronously driving the pressing frame 21 to move downward to press on the top of the valve seat 8, thereby fixing the valve seat 8 at the assembly station; then start the first drive cylinder, and the output shaft of the first drive cylinder extends, synchronously driving the slide 62 to move along the extension direction of the interface and in the direction close to the gas connector 9, and the slide 62 simultaneously drives the sliding sleeve 61 to move through the clamping of four rotating wheels 63, and as the sliding sleeve 61 moves, the chuck 4 is pushed around the hinge point in the direction close to the gas connector 9 by the push of the inner circumferential wall of the sliding sleeve 61 until the two chucks 4 are parallel.

[0112] In the process of switching the states of the chucks 4, the two chucks 4 approach each other synchronously. When the clamping block 41 contacts the screwing portion 91, as the two chucks 4 continue to approach each other, under the push of the screwing portion 91, the two clamping blocks 41 can both revolve around the second axis so that the clamping surface and the screwing surface 911 are parallel; at the same time, under the push of the screwing portion 91, the clamping block 41 synchronously drives the rotating frame 43 to slide in the open circular groove 421 until the clamping surface and the screwing surface 911 are parallel; in the process of the sliding of the rotating frame 43, the rotating frame 43 synchronously drives the pressing sheet 511 to slide, so that there must be a liquid capsule 512 that becomes smaller in volume under the push of the pressing sheet 511, thereby causing the first liquid in it to The pressurized fluid can enter the other liquid bag 512 through the liquid pipe 513 to increase its volume; during the flow of the first hydraulic fluid, the hydraulic sensor can measure the pressure change, and infer the flow of the liquid by analyzing the pressure change, and then obtain the amount of the first hydraulic fluid flowing, and then send a signal to the fluid replenisher 5163, the fluid replenisher 5163 transports the second hydraulic fluid in the second sub-chamber to the first sub-chamber, and under the hydraulic push, the screw 514 rotates synchronously in the clockwise direction to screw out the mounting ring 402, and then drives the clamping block 41 to move toward the direction close to the gas connector 9 through the mounting seat 42, so that the screwing part 91 is clamped by the two clamping blocks 41.

[0113] Then start the driving motor 14, which drives the rotating block 3 to rotate, and the rotating block 3 synchronously drives the two chucks 4 to rotate. The two chucks 4 simultaneously drive the gas connector 9 to rotate through the clamping block 41 to tighten the gas connector 9 at the interface.

[0114] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A tightening device for assembling a gas pressure reducing valve, characterized in that: The tightening device for assembling a gas pressure reducing valve is used to assemble a valve seat and a gas connector of the gas pressure reducing valve, wherein the valve seat has an interface, and the gas connector has a screwing portion, and the screwing portion has at least two screwing surfaces arranged opposite to each other; The tightening device for assembling the gas pressure reducing valve comprises: A machine base, wherein an assembly station is arranged on the machine base, and the valve seat is located at the assembly station during assembly; a positioning mechanism, the positioning mechanism being configured to fix the valve seat at the assembly station; A rotating block, arranged on the base and located in the extension direction of the interface, the rotating block can rotate around a first axis, and the first axis coincides with the extension direction of the interface; A chuck, one end of which is hinged on the rotating block, and the other end is suspended; there are two chucks, which are symmetrically arranged on both sides of the screwing part; the two chucks are configured to have a first state and a second state according to the assembly situation, and when the valve seat and the gas connector are placed, the two chucks are in the first state, and the two chucks together form an "eight"-shaped structure to make way for the gas connector; when clamping the screwing part, the two chucks are in the second state, and the two chucks together form a "two"-shaped structure to clamp on the two oppositely arranged screwing surfaces respectively; a clamping block is arranged on the chuck, and the clamping block has a clamping surface, and the clamping block can revolve around a second axis so that the clamping surface is parallel to the screwing surface, and the second axis is arranged in parallel to the first axis; A moving mechanism, wherein the moving mechanism is configured to adjust the distance between the two clamping blocks in direct proportion to the rotation angle of the clamping blocks, so as to clamp the screwing portion; an adjustment mechanism, wherein the adjustment mechanism is configured to be able to adjust the two chucks to switch between the first state and the second state; The chuck is also provided with a mounting seat and a rotating frame, the mounting seat is provided with an open circular groove, the second axis coincides with the center of the circle of the open circular groove; the rotating frame is slidably inserted in the open circular groove, and the clamping block is sleeved on the rotating frame; the moving mechanism includes two moving components, the moving components and the chuck are arranged correspondingly, the moving components include a pressing sheet, a liquid capsule, a liquid pipe, a screw, a sensing part and an adjusting part, the pressing sheet is fixedly arranged on the rotating frame; the liquid capsule is filled with a first hydraulic fluid, and the number of the liquid capsules is two, and the two liquid capsules are arranged The hydraulic fluid is placed on the mounting seat and symmetrically arranged on both sides of the pressing plate; the liquid pipe is connected to the two liquid bags; one end of the screw is rotatably arranged on the mounting seat, and the other end is spirally inserted on the chuck; the sensing part is configured to sense the amount of the first hydraulic fluid exchanged between the two liquid bags; the adjusting part is configured to proportionally adjust the number of rotations of the screw according to the amount of the first hydraulic fluid exchanged between the two liquid bags sensed by the sensing part, so that the screw drives the clamping block to move toward the direction close to the screwing part through the mounting seat.

2. The tightening device for assembling a gas pressure reducing valve according to claim 1, characterized in that: The regulating part includes a liquid chamber, a partition plate and a fluid replenisher. The liquid chamber is arranged on the mounting seat and is filled with a second hydraulic fluid. The partition plate is fixedly arranged on the screw rod and divides the liquid chamber into a first sub-chamber and a second sub-chamber that are not connected to each other. The fluid replenisher is connected to the first sub-chamber and the second sub-chamber at the same time, and is configured to be able to fill the second hydraulic fluid into the first sub-chamber and recover the second hydraulic fluid in the second sub-chamber, or to fill the second hydraulic fluid into the second sub-chamber and recover the second hydraulic fluid in the first sub-chamber.

3. The tightening device for assembling a gas pressure reducing valve according to claim 1, characterized in that: There are multiple clamping surfaces on the clamping block, and the multiple clamping surfaces are arranged along the circumferential direction; the tightening equipment for assembling the gas pressure reducing valve also includes a switching mechanism, and the switching mechanism is configured to be able to switch between different clamping surfaces.

4. The tightening device for assembling a gas pressure reducing valve according to claim 3, characterized in that: The switching mechanism includes two switching components, and the switching components and the chuck are arranged correspondingly. The switching component includes a spline hole, a slide bar and a locking nut. The spline hole is arranged on the clamping block; the slide bar is arranged on the rotating frame and can be relatively slidably inserted in the spline hole when in use; the locking nut is threadedly sleeved on the rotating frame and pressed on the clamping block when in use.

5. The tightening device for assembling a gas pressure reducing valve according to claim 1, characterized in that: The adjustment mechanism includes a torsion spring and a sliding sleeve. There are two torsion springs, which are arranged at the hinge between the clamp and the rotating block. Under the action of the torsion spring, the two clamps have a tendency to remain in the first state. The sliding sleeve is sleeved on the rotating block and forms a spline fit with the rotating block. The sliding sleeve can slide along the extension direction of the interface to form a stop fit with the chuck.

6. The tightening device for assembling a gas pressure reducing valve according to claim 5, characterized in that: The tightening device for assembling the gas pressure reducing valve also includes balls, which are inserted into the sliding sleeve and can roll freely; there are multiple balls, and the multiple balls are divided into two groups. The two groups of balls are respectively arranged on the sliding sleeve and corresponding to the chuck so as to form a rolling fit with the chuck.

7. The tightening device for assembling a gas pressure reducing valve according to claim 5, characterized in that: The adjustment mechanism also includes a slide and a rotating wheel, wherein the slide is arranged on the machine base and can slide along the extension direction of the interface; there are four rotating wheels, and the four rotating wheels are divided into two groups, the two groups are symmetrically arranged on the slide and are respectively located on both sides of the sliding sleeve, and the two rotating wheels in the same group frictionally clamp the sliding sleeve.

8. The tightening device for assembling a gas pressure reducing valve according to claim 1, characterized in that: The positioning mechanism comprises a pressing frame which can slide up and down in a vertical direction so as to press on the top of the valve seat when in use.

9. The tightening device for assembling a gas pressure reducing valve according to claim 1, characterized in that: The tightening device for assembling a gas pressure reducing valve further includes a driving member configured to provide a driving force for the rotating block to rotate around the first axis.

Images