Full-automatic pressure gauge verification system

Abstract

The invention provides a full-automatic pressure gauge verification system. The full-automatic pressure gauge verification system comprises a feeding and discharging mechanism, a verification workbench, a manipulator and a pressure control mechanism, the feeding and discharging mechanism is used for conveying a pressure gauge to be detected from a feeding position to a gauge taking position and conveying the detected pressure gauge from a gauge placing position to a discharging position. The verification workbench comprises a joint connector and an image recognition device. The joint connector is used for receiving the pressure gauge grabbed by the manipulator and clamping and locking the pressure gauge; the image recognition module is used for carrying out image acquisition on dial information of the pressure gauge and reading a verification indicating value; the manipulator is used for grabbing a to-be-detected pressure gauge from the gauge taking position and transferring the to-be-detected pressure gauge to the joint connector, and is also used for grabbing the detected pressure gauge from the joint connector and transferring the detected pressure gauge to the gauge placing position; and the pressure control mechanism is used for controlling the pressure of the calibration gas circuit to a preset calibration pressure value. According to the invention, full-automatic calibration of the pressure gauge can be realized, and the calibration efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of instrument calibration, and in particular to a full-automatic pressure gauge calibration system. Background Art

[0002] Traditionally, the calibration of pressure gauges is mostly done manually, that is, a pressure calibrator is prepared, and then the standard pressure gauge and the gauge to be tested are simultaneously threaded onto the two pressure output ports of the pressure calibrator, and then the pressure is pressed to the target pressure manually or electronically, and the indications of the standard pressure gauge and the gauge to be tested are observed respectively, and recorded in the calibration form. The calibration work of multiple calibration points specified in the calibration procedures is completed in the above manner. However, the traditional calibration method can only calibrate one pressure gauge at a time, and manual loading and unloading of the gauge, pressure control, reading, and data recording are required during the calibration process. The degree of automation is low, the labor intensity is high, and the efficiency is low. Therefore, based on some of the above traditional problems, it is urgent to propose a fully automatic pressure gauge calibration system. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present invention proposes a fully automatic pressure gauge calibration system, which can realize fully automatic calibration of the pressure gauge and improve the calibration efficiency.

[0004] The present invention proposes a fully automatic pressure gauge calibration system, which comprises: a loading and unloading mechanism, a calibration workbench, a manipulator and a pressure control mechanism; Loading and unloading mechanism, used to transfer the pressure gauge to be inspected from the loading position to the meter taking position, and to transfer the inspected pressure gauge from the meter placing position to the unloading position; The calibration workbench comprises: at least one joint connector and at least one image recognition device; the joint connector is used to receive the pressure gauge grasped by the manipulator and clamp and lock it, so that the pressure gauge is sealed and connected with the calibration gas path, and release the pressure gauge after the pressure gauge completes the calibration; the image recognition module is used to collect the image of the dial information of the pressure gauge, and read the calibration indication after the image recognition processing; The manipulator is used to grab the pressure gauge to be inspected from the loading and unloading mechanism from the gauge picking position and move it to the corresponding joint connector for clamping and locking. It is also used to grab the inspected pressure gauge from the corresponding joint connector and move it to the gauge placing position; The pressure control mechanism is used to control the pressure of the calibration gas circuit to a preset calibration pressure value.

[0005] Furthermore, the loading and unloading mechanism includes: a loading mechanism, a conveying mechanism and a unloading mechanism, and the loading mechanism and the unloading mechanism are respectively located at the input end and the output end of the conveying mechanism; A feeding mechanism, located at the feeding position, is used to sequentially feed a plurality of pre-stored pressure gauges to be inspected to the input end of the conveying mechanism; The conveying mechanism receives the pressure gauge to be inspected from the loading mechanism through the input end and transmits it to the meter-taking position to wait for the robot to grab it, and at the same time, sends the inspected pressure gauge placed by the robot at the meter-putting position to the unloading mechanism through the output end; The unloading mechanism is located at the unloading position and is used to collect the inspected pressure gauges transmitted by the conveying mechanism in sequence and unload them collectively.

[0006] Furthermore, the feeding mechanism includes: a feeding frame, a feeding motor, a feeding transmission belt, a lead screw, a nut, and a lifting plate; The feeding motor is arranged at the bottom end of the feeding rack; the number of lead screws and nuts is an even number of more than two, and they are evenly located on both sides of the feeding rack according to the number; the nuts correspond to the lead screws one by one, and the nuts are fixedly arranged on the outer edge of the lifting plate; the feeding motor drives the lead screw to rotate through the feeding transmission belt, and drives the lifting plate to move up and down under the cooperation of the threads of the lead screw and the nut.

[0007] Furthermore, the fully automatic pressure gauge calibration system further comprises: a tray and a tray placement rack; The tray is provided with a plurality of gauge positions for placing pressure gauges; The pallet placement rack is provided with multiple layers of guide rails, and each layer of guide rails includes two parallel guide rails for guiding and supporting the pallet.

[0008] Furthermore, the conveying mechanism includes: a conveying motor, a conveying belt, an input mechanism, an output mechanism, a meter taking and positioning mechanism, and a meter placing and positioning mechanism; The conveyor motor is used to drive the conveyor belt to move and drive the tray to move from the input end to the output end; An inlet mechanism, arranged at the inlet end of the conveying mechanism, is used to pull the tray carrying the pressure gauge to be inspected out from the corresponding guide rail of the tray placement rack and shift it to the conveyor belt; The outgoing mechanism is arranged at the outgoing end of the conveying mechanism and is used to push the pallet carrying the inspected pressure gauge from the conveyor belt to the corresponding guide rail of the pallet placement rack; A gauge retrieval positioning mechanism, used to position the tray carrying the pressure gauge to be inspected, which is conveyed by the conveyor belt, at a gauge retrieval position; The anti-table positioning mechanism is used to position the empty pallet in the table placement position.

[0009] Furthermore, the introduction mechanism includes: a first cylinder, a first telescopic rod, a second cylinder, a second telescopic rod and a bayonet; The first telescopic rod is movably mounted in the first cylinder, and the second telescopic rod is movably mounted in the second cylinder, and the telescopic directions of the first telescopic rod and the second telescopic rod are perpendicular; The second cylinder is fixedly arranged at the free end of the first telescopic rod, and the bayonet is arranged at the free end of the second telescopic rod; The tray is provided with a card slot which cooperates with the card pin.

[0010] Further, the joint connector comprises: a connector body, a locking sleeve, and a clamping assembly; The connector body has a connection port at one end for external piping and a mounting portion at the other end for mounting the clamping assembly; The clamping assembly includes a plurality of clamping members, which are circumferentially arranged around the mounting portion of the connector body and can be rotated based on the mounting portion respectively, and the outer sides of both ends of each clamping member are provided with reverse wedge structures, and the inner side of one end of each clamping member away from the connector body is provided with a clamping structure; A locking sleeve is movably sleeved on the outer periphery of the clamping assembly and can move axially under the action of a driving force, and the locking sleeve is provided with a reverse holding structure at the position of the reverse wedge-shaped structure of the plurality of clamping members; When the locking sleeve moves axially, the corresponding abutting structure of the locking sleeve presses against the corresponding wedge-shaped structure of the clamping piece, so as to drive the multiple clamping pieces to rotate relative to the connector body respectively, and enable the clamping structures of the multiple clamping pieces to clamp or release the external connector.

[0011] Furthermore, the reverse wedge structure includes a first wedge surface and a second wedge surface, and the first wedge surface and the second wedge surface are respectively located on the outer sides of the two ends of the clamping member and are arranged in opposite directions; the reverse abutting structure includes a first abutting portion and a second abutting portion, the first abutting portion is used to perform a wedge-shaped fit with the first wedge surface, and the second abutting portion is used to perform a wedge-shaped fit with the second wedge surface.

[0012] Furthermore, the first abutting portion and the first wedge-shaped surface, as well as the second abutting portion and the second wedge-shaped surface, are alternately wedge-matched with each other.

[0013] Further, the locking sleeve and the clamping assembly are arranged on the same central axis; The locking sleeve further includes a first locking surface, which is disposed adjacent to the lower edge of the first abutting portion; each clamping member further includes a first mating surface, which is disposed adjacent to the upper edge of the first wedge-shaped surface; when the locking sleeve locks the clamping assembly, the first locking surface abuts against the first mating surface of each clamping member to prevent each clamping member from opening outward; The first locking surface is a circular surface, the first matching surface of each clamping member is an arc surface, and the vertical lines of the first locking surface and the first matching surface respectively intersect the central axis perpendicularly.

[0014] The fully automatic pressure gauge calibration system of the present invention replaces the traditional manual gauge calibration method, saves labor costs, and effectively improves the calibration efficiency of the pressure gauge.

[0015] The joint connector of the present invention cooperates with the reverse wedge structure and the reverse abutting structure to achieve rapid clamping or loosening of the external joint, replacing the traditional connection method of the external joint by rotating the thread, and effectively improving the connection efficiency of the external joint.

[0016] The present invention can ensure that after clamping the external connector, the auxiliary cavity is pressurized to pressurize the first sealing ring between the connecting piece and the external connector to form a sealed connection through the ingenious design of the auxiliary cavity, the connecting hole and the piston part. Moreover, the present invention also uses the pressure area difference at both ends of the connecting piece to enable the connecting piece to adapt to the pressure of the external pipeline to generate a corresponding clamping force on the external connector, effectively ensuring the connection sealing between the joint connector and the external connector.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural schematic diagram of a fully automatic pressure gauge calibration system of the present invention is shown; Figure 2 yes Figure 1 A schematic diagram of the structure of the feeding mechanism, the pallet placement rack and the pallet; Figure 3 yes Figure 1 A schematic diagram of the structure of the transmission mechanism; Figure 4 is a schematic diagram of the three-dimensional structure of a joint connector according to one embodiment of the present invention; Figure 5 yes Figure 4 One of the exploded perspective views of the connector; Figure 6 yes Figure 4 The second three-dimensional exploded schematic diagram of the joint connector; Figure 7 yes Figure 4 A schematic cross-sectional view of the joint connector in a clamped state; Figure 8 yes Figure 4 A schematic cross-sectional view of the joint connector in an open state.

[0019] Reference numerals: Verification workbench 100, joint connector 10, connector body 11, connection port 111, mounting portion 112, mounting cavity 113, second limit shoulder 1131, piston cavity 114, first cavity 1141, second cavity 1142, first air source hole 1143, second air source hole 1144, cavity port 1145, fourth sealing ring 1146, connection hole 115, first body 117, second body 118, third body 119, locking sleeve 12, reverse holding structure 121, first holding portion 1211, second holding portion 1212, first locking surface 122, second locking surface 123, avoidance groove 116, piston portion 125, second sealing ring Sealing ring 1251, third sealing ring 1252, inner convex ring 1253, outer convex ring 1254, exhaust channel 1255, clamping assembly 13, clamping member 131, reverse wedge structure 1311, first wedge surface 1312, second wedge surface 1313, first mating surface 1314, second mating surface 1315, mounting groove 1316, limiting surface 1317, groove 1318, clamping structure 1319, connecting member 14, connecting hole 141, pressure-bearing space 142, first sealing ring 143, fifth sealing ring 144, sixth sealing ring 145, first limiting shoulder 146, auxiliary cavity 15, image recognition device 20, tapping mechanism 30; Loading and unloading mechanism 200, loading mechanism 210, loading rack 211, loading motor 212, loading transmission belt 213, lead screw 214, nut 215, lifting plate 216, conveying mechanism 220, conveying motor 221, conveying belt 222, input mechanism 223, first cylinder 2231, first telescopic rod 2232, second cylinder 2233, second telescopic rod 2234, bayonet 2235, output mechanism 224, unloading mechanism 230; Robot 300; Tray placement rack 400, guide rail 410, limit baffle 420; Tray 500, card slot 510; Material car 600; DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0022] like Figures 1 to 3As shown, the present invention proposes a fully automatic pressure gauge calibration system, the system comprising: a calibration workbench 100, a loading and unloading mechanism 200, a manipulator 300 and a pressure control mechanism; The loading and unloading mechanism 200 is used to transfer the pressure gauge to be inspected from the loading position to the meter taking position, and to transfer the inspected pressure gauge from the meter placing position to the unloading position; The calibration workbench 100 includes: at least one joint connector 10 and at least one image recognition device 20; the joint connector 10 is used to receive the pressure gauge grasped by the manipulator 300 and clamp and lock it, so that the pressure gauge is sealed and connected with the calibration gas path, and release the pressure gauge after the pressure gauge completes the calibration; the image recognition module is used to collect the image of the dial information of the pressure gauge, and read the calibration indication after the image recognition processing; The manipulator 300 is used to grab the pressure gauge to be inspected transmitted by the loading and unloading mechanism 200 from the gauge taking position and transfer it to the corresponding joint connector 10 for clamping and locking, and is also used to grab the inspected pressure gauge from the corresponding joint connector and transfer it to the gauge placing position; The pressure control mechanism is used to control the pressure of the calibration gas circuit to a preset calibration pressure value.

[0023] According to an embodiment of the present invention, the loading and unloading mechanism 200 includes: a loading mechanism 210, a conveying mechanism 220 and a unloading mechanism 230, and the loading mechanism 210 and the unloading mechanism 230 are respectively located at the input end and the output end of the conveying mechanism 220; The feeding mechanism 210 is located at the feeding position and is used to sequentially feed a plurality of pre-stored pressure gauges to be inspected to the input end of the conveying mechanism 220; The conveying mechanism 220 receives the pressure gauge to be inspected from the loading mechanism 210 through the input end and transmits it to the meter taking position to wait for the robot 300 to grab it, and at the same time, the pressure gauge that has been inspected and placed in the meter placing position by the robot 300 is sent to the unloading mechanism 230 through the output end; The unloading mechanism 230 is located at the unloading position and is used to sequentially collect the inspected pressure gauges transmitted by the conveying mechanism 220 and unload them collectively.

[0024] According to the embodiment of the present invention, the feeding mechanism 210 includes: a feeding frame 211, a feeding motor 212, a feeding transmission belt 213, a lead screw 214, a nut 215, and a lifting plate 216; The feeding motor 212 is arranged at the bottom end of the feeding frame 211; the lead screws 214 and the nuts 215 are both an even number of more than two, and are evenly located on both sides of the feeding frame 211 according to the number; the nuts 215 correspond to the lead screws 214 one by one, and the nuts 215 are fixedly arranged on the outer edge of the lifting plate 216; the feeding motor 212 drives the lead screw 214 to rotate through the feeding transmission belt 213, and under the action of the threaded cooperation between the lead screw 214 and the nut 215, drives the lifting plate 216 to move up and down.

[0025] It can be understood that the structural design of the unloading mechanism 230 is the same as that of the loading mechanism 210, and will not be described in detail here.

[0026] According to an embodiment of the present invention, the fully automatic pressure gauge calibration system further comprises: a tray 500 and a tray placement rack 400; The tray 500 is provided with a plurality of gauge positions for placing pressure gauges; The tray placement rack 400 is provided with multiple layers of guide rails 410 , and each layer of guide rails 410 includes two parallel guide rails 410 for guiding and supporting the tray.

[0027] According to an embodiment of the present invention, the conveying mechanism 220 includes: a conveying motor 221, a conveying belt 222, an input mechanism 223, an output mechanism 224, a table taking positioning mechanism (not shown), and a table placing positioning mechanism (not shown); The conveying motor 221 is used to drive the conveying belt 222 to move, and drive the tray to move from the input end to the output end; The inlet mechanism 223 is disposed at the inlet end of the conveying mechanism 220 and is used to pull the tray 500 carrying the pressure gauge to be inspected out from the corresponding guide rail 410 of the tray placement rack 400 and shift it to the conveyor belt 222; The outgoing mechanism 224 is disposed at the outgoing end of the conveying mechanism 220 and is used to push the pallet carrying the inspected pressure gauge from the conveyor belt 222 to the corresponding guide rail 410 of the pallet placement rack; A gauge retrieval positioning mechanism, used to position the tray carrying the pressure gauge to be inspected, which is conveyed by the conveyor belt 222, at a gauge retrieval position; The anti-table positioning mechanism is used to position the empty pallet in the table placement position.

[0028] It can be understood that the conveyor belt 222 of the present invention can be a conveyor chain track or a conveyor belt, but is not limited thereto.

[0029] According to an embodiment of the present invention, the introduction mechanism 223 includes: a first cylinder 2231, a first telescopic rod 2232, a second cylinder 2233, a second telescopic rod 2234 and a bayonet 2235; The first telescopic rod 2232 is movably mounted in the first cylinder 2231, and the second telescopic rod 2234 is movably mounted in the second cylinder 2233, and the telescopic directions of the first telescopic rod 2232 and the second telescopic rod 2234 are perpendicular; The second cylinder 2233 is fixedly arranged at the free end of the first telescopic rod 2232, and the bayonet 2235 is arranged at the free end of the second telescopic rod 2234; The tray is provided with a latching slot 510 which cooperates with the latching pin 2235 .

[0030] It can be understood that the structural design of the outgoing mechanism 224 is similar to that of the incoming mechanism 223, and will not be described in detail here.

[0031] In actual application, the first cylinder 2231 drives the first telescopic rod 2232 to extend, and the latch 2235 is aligned with the latch slot 510 of the corresponding pallet in the pallet placement rack; then the second cylinder 2233 drives the second telescopic rod 2234 to extend, and the latch 2235 is latched into the pallet latch slot 510. The first cylinder 2231 drives the first telescopic rod 2232 to retract, and pulls the corresponding pallet out of the guide rail 410 of the pallet placement rack and moves it to the conveyor belt 222, and the conveyor belt 222 can later convey the pallet carrying the pressure gauge.

[0032] The fully automatic pressure gauge calibration system of the present invention can also be equipped with a material cart 600, which is used to facilitate the user to carry the pallet rack 400. Preferably, the material cart 600 can carry the pallet rack 400 and extend it into the loading rack 211, and directly send it to the lifting plate 216 of the loading mechanism 210; or it can extend into the unloading rack of the unloading mechanism 230 and transport the pallet rack on the lifting plate 216 out.

[0033] A limit stopper 420 is disposed on one side of the tray placement rack 400 and corresponds to one end of the plurality of guide rails 410 to prevent the tray from escaping from the tray placement rack 400 along the guide rails 410 .

[0034] The calibration workbench 100 of the present invention further includes at least one tapping mechanism 30, and the at least one tapping mechanism 30 corresponds to at least one joint connector 10 and at least one image recognition device 20. Each tapping mechanism 30 is adjacent to the corresponding joint connector 10, so as to tap the pressure gauge during the calibration process of the pressure gauge, thereby facilitating the calibration indication of the pressure gauge after the tapping.

[0035] The working principle of the fully automatic pressure gauge calibration system of the present invention is: The material vehicle pushes the fully loaded pallet rack onto the lifting plate 216 of the feeding mechanism 210. The feeding motor 212 drives the lead screw 214 to rotate through the feeding transmission belt 213, and the lifting plate 216 drags the pallet rack upward through the cooperation of the lead screw 214 and the nut 215, until the pallet on the top of the pallet rack is flush with the conveyor belt 222 of the conveying mechanism 220. Then, the feeding mechanism 223 of the conveying mechanism 220 pulls the pallet on the top from the pallet rack to the conveyor belt 222, and the conveying mechanism 220 moves the pallet carrying the pressure gauge to be inspected to the meter retrieval position, and the pallet is positioned by the meter retrieval positioning mechanism to prevent the pallet from continuing to move forward. The manipulator 300 grabs the pressure gauge to be inspected from the pallet and transfers it to the corresponding joint connector 10, which clamps and locks the pressure gauge and forms a sealed connection with the calibration gas path. Preferably, there are four gauge positions on the pallet, and there are also four joint connectors 10 and image recognition devices 20. After the robot 300 sequentially installs the four pressure gauges to be inspected on the pallet to the corresponding four joint connectors 10, the gauge positioning mechanism releases the positioning of the empty pallet, and the empty pallet continues to move forward under the action of the conveyor belt 222 until the gauge placement position. At this time, the gauge placement positioning mechanism positions the empty pallet to prevent the empty pallet from continuing to move forward. At the same time, the pressure control mechanism controls the pressure of the calibration air circuit to a preset calibration pressure value, and the four image recognition devices 20 respectively read the pressure indication values ​​installed on the corresponding joint connectors 10 and record them in the system until all the calibration points are completed. The joint connector 10 releases the pressure gauge, and the manipulator 300 grabs the pressure gauge and moves it to the gauge position of the empty pallet at the gauge placement position. After the manipulator 300 grabs and moves all the pressure gauges installed on the four joint connectors 10 to the four gauge positions of the empty pallet, the gauge placement positioning mechanism releases the pallet carrying the inspected pressure gauges, and the pallet continues to move forward under the action of the conveyor belt 222 until it reaches the outgoing end, and the outgoing mechanism 224 pushes the pallet carrying the inspected pressure gauges onto the corresponding guide rails 410 on the pallet placement rack 400 in the unloading mechanism 230. It can be understood that before the outgoing mechanism 224 pushes the pallet into the pallet placement rack 400 of the unloading mechanism 230, the unloading mechanism 230 first makes a layer of empty guide rails 410 flush with the conveyor belt 222 of the conveying mechanism 220 through the action of the screw 214, the nut 215 and the lifting plate 216.

[0036] After the previous pallet is moved from the table-taking position to the table-putting position for positioning, the feeding mechanism 210, under the action of the lead screw 214, the nut 215 and the lifting plate 216, causes the next pallet placement rack 400 to rise one layer, so that the next pallet is flush with the conveyor belt 222 of the conveying mechanism 220. Then, the feeding mechanism 223 of the conveying mechanism 220 pulls the next pallet from the pallet placement rack to the conveyor belt 222, and the conveying mechanism 220 moves the next pallet to the table-taking position, and the table-taking positioning mechanism positions the next pallet. Thus, the cyclic operation of loading and unloading is realized, and the operation efficiency is high.

[0037] like Figures 4 to 8 As shown, the joint connector 10 includes: a connector body 11, a locking sleeve 12, and a clamping assembly 13; The connector body 11 has a connection port 111 at one end for external piping and a mounting portion 112 at the other end for mounting the clamping assembly 13; The clamping assembly 13 includes a plurality of clamping members 131, which are circumferentially arranged around the mounting portion 112 of the connector body 11 and can rotate based on the mounting portion 112 respectively. The outer sides of both ends of each clamping member 131 are provided with reverse wedge structures 1311, and the inner side of one end of each clamping member 131 away from the connector body 11 is provided with a clamping structure 1319; The locking sleeve 12 is movably mounted on the outer periphery of the clamping assembly 13 and can move axially under the action of a driving force. The locking sleeve 12 is provided with a reverse holding structure 121 at the position of the reverse wedge-shaped structure 1311 of the plurality of clamping members 131; When the locking sleeve 12 moves axially, the corresponding abutting structure of the locking sleeve 12 presses against the corresponding wedge structure of the clamping member 131, so as to drive the multiple clamping members 131 to rotate relative to the connector body 11 respectively, and enable the clamping structures 1319 of the multiple clamping members 131 to clamp or release the external connector.

[0038] The joint connector 10 of the present invention cooperates with the reverse wedge structure 1311 and the reverse abutment structure 121 to achieve rapid clamping or loosening of the external joint, replacing the traditional connection method of the external joint by rotating the thread, and effectively improving the connection efficiency of the external joint. At the same time, the present invention can ensure that after clamping the external joint, the auxiliary cavity 15 is pressurized to form a sealed connection by pressurizing the auxiliary cavity 15 through the ingenious design of the auxiliary cavity 15, the first sealing ring 143 between the connecting piece 14 and the external joint. Moreover, the present invention also uses the difference in pressure area at both ends of the connecting piece 14 to enable the connecting piece 14 to adapt to the pressure of the external pipeline to generate a corresponding clamping force on the external joint, effectively ensuring the connection sealing between the joint connector 10 and the external joint.

[0039] According to an embodiment of the present invention, the reverse wedge structure 1311 includes a first wedge surface 1312 and a second wedge surface 1313, and the first wedge surface 1312 and the second wedge surface 1313 are respectively located on the outer sides of the two ends of the clamping member 131 and are arranged in opposite directions; the reverse abutting structure 121 includes a first abutting portion 1211 and a second abutting portion 1212, and the first abutting portion 1211 is used to perform wedge-shaped cooperation with the first wedge surface 1312, and the second abutting portion 1212 is used to perform wedge-shaped cooperation with the second wedge surface 1313.

[0040] According to the embodiment of the present invention, the first abutting portion 1211 and the first wedge-shaped surface 1312 , as well as the second abutting portion 1212 and the second wedge-shaped surface 1313 , are alternately wedge-matched with each other.

[0041] It can be understood that when the first abutting portion 1211 is wedge-fitted with the first wedge surface 1312, the second abutting portion 1212 has no contact with the second wedge surface 1313, so as to avoid affecting the wedge-fitting state between the first abutting portion 1211 and the first wedge surface 1312; when the second abutting portion 1212 is wedge-fitted with the second wedge surface 1313, the first abutting portion 1211 has no contact with the first wedge surface 1312, so as to avoid affecting the wedge-fitting state between the second abutting portion 1212 and the second wedge surface 1313.

[0042] It can be understood that the first abutting portion 1211 and the second abutting portion 1212 can be abutting surfaces (such as arc surfaces or planes), and the abutting surfaces press the corresponding wedge surfaces so that the abutting surfaces slide relative to the wedge surfaces; or they can be roller structures, that is, the rollers are installed on the locking sleeve 12, and the rollers press the corresponding wedge surfaces so that the rollers roll relatively along the wedge surfaces. But it is not limited thereto.

[0043] According to an embodiment of the present invention, the locking sleeve 12 and the clamping assembly 13 are arranged on the same central axis; The locking sleeve 12 further includes a first locking surface 122, which is disposed adjacent to the lower edge of the first abutting portion 1211; each clamping member 131 further includes a first mating surface 1314, which is disposed adjacent to the upper edge of the first wedge surface 1312; when the locking sleeve 12 locks the clamping assembly 13, the first locking surface 122 abuts against the first mating surface 1314 of each clamping member 131 to prevent each clamping member 131 from opening outward; The first locking surface 122 is a circular surface, the first matching surface 1314 of each clamping member 131 is an arc surface, and the vertical lines of the first locking surface 122 and the first matching surface 1314 respectively intersect the central axis perpendicularly.

[0044] According to the embodiment of the present invention, the locking sleeve 12 further includes a second locking surface 123, which is disposed adjacent to the lower edge of the second abutting portion 1212; each clamping member 131 further includes a second mating surface 1315, which is disposed adjacent to the lower edge of the second wedge surface 1313; when the locking sleeve 12 locks the clamping assembly 13, the second locking surface 123 abuts against the second mating surface 1315 of each clamping member 131 to prevent each clamping member 131 from opening outward; The second locking surface 123 is a circular surface, the second matching surface 1315 of each clamping member 131 is an arc surface, and the vertical lines of the second locking surface 123 and the second matching surface 1315 respectively intersect the central axis perpendicularly.

[0045] According to an embodiment of the present invention, each clamping member 131 further includes a mounting groove 1316 , which is located between the first wedge surface 1312 and the second wedge surface 1313 and opens inwardly, and the shape and size of the mounting groove 1316 are adapted to the shape and size of the mounting portion 112 .

[0046] According to the embodiment of the present invention, each clamping member 131 is provided with a limiting surface 1317 on a side away from the second wedge-shaped surface 1313, and the connector body 11 is provided with an avoiding groove 116 inwardly concave at a position corresponding to the limiting surface 1317; The second supporting portion 1212 of the locking sleeve 12 presses against the second wedge surface 1313 of each clamping member 131, so that each clamping member 131 rotates based on the mounting portion 112, and the limiting surface 1317 gradually fits toward the bottom surface of the avoiding groove 116 until the limiting surface 1317 is completely in contact with the bottom surface of the avoiding groove 116.

[0047] According to the embodiment of the present invention, a groove 1318 is formed on the second mating surface 1315 of each clamping member 131, and the grooves 1318 of each clamping member 131 are sequentially connected to form an annular groove; The joint connector 10 further includes an elastic collar (not shown), which is sleeved in the annular groove and is used to provide auxiliary elastic force for the multiple clamping members 131 to open.

[0048] Preferably, the elastic clamp ring can be an elastic resin rubber ring or an elastic steel ring, but is not limited thereto.

[0049] According to an embodiment of the present invention, a mounting cavity 113 is provided in the connector body 11; The joint connector 10 also includes: a connecting piece 14, which is movably installed in the installation cavity 113, and the connecting piece 14 has a connecting hole 141 axially opened, one end of the connecting hole 141 is sealed and connected to the connecting port 111, and the other end of the connecting hole 141 is sealed and connected to the external connector when the clamping assembly 13 clamps the external connector.

[0050] According to an embodiment of the present invention, one end of the connecting piece 14 is recessed toward the connecting port 111 to form a pressure-bearing space 142, and the connecting piece 14 is away from the connecting port 111 at one end and a first sealing ring 143 is nested on the periphery of the connecting hole 141; the bottom area of ​​the pressure-bearing space 142 is larger than the area enclosed by the first sealing ring 143.

[0051] It can be understood that the pressure area of ​​the lower end of the connecting member 14 upward along the central axis is greater than the pressure area of ​​the upper end of the connecting member 14 downward along the central axis. In this way, when the external pipeline passes through high-pressure gas or liquid, the high-pressure gas or liquid will fill the connecting hole 141. At this time, the lower pressure surface of the connecting piece 14 generates an upward pressure force under the action of pressure, that is, F1=P1*S1, where P1 is the pressure of the high-pressure gas or liquid, and S1 is the lower pressure area of ​​the connecting piece 14; the upper pressure surface of the connecting piece 14 generates a downward pressure force under the same pressure, that is, F2=P1*S2, S2 is the upper pressure area of ​​the connecting piece 14. Since the upper pressure surface is larger than the lower pressure surface, an upward supporting force F3=F1-F2=P1*(S1-S2) will be generated on the connecting piece 14, thereby pushing the connecting piece 14 to move toward the external connector, and as the pressure of the high-pressure gas or liquid increases, this driving force will also increase, thereby squeezing the first sealing ring 143 to produce deformation, thereby achieving a sealed connection between the connecting piece 14 and the external connector to avoid the risk of gas leakage or liquid leakage.

[0052] According to the embodiment of the present invention, the connector body 11 is further provided with an annular piston chamber 114; An annular piston portion 125 is provided at one end of the locking sleeve 12 away from the first abutting portion 1211, and the cross-sectional dimension of the piston portion 125 is adapted to the cross-sectional dimension of the piston cavity 114; A second sealing ring 1251 and a third sealing ring 1252 are respectively nested on the inner and outer sides of the piston part 125. The second sealing ring 1251 is used to seal the inner side surface of the piston part 125 with the inner cavity wall of the piston cavity 114, and the third sealing ring 1252 is used to seal the outer side surface of the piston part 125 with the outer cavity wall of the piston cavity 114.

[0053] According to an embodiment of the present invention, the piston portion 125 includes an inner convex ring 1253 and an outer convex ring 1254 which are staggered, and the inner convex ring 1253 is farther away from the first abutting portion 1211 than the outer convex ring 1254; The second sealing ring 1251 and the third sealing ring 1252 are respectively nested on the outer side surfaces of the inner convex ring 1253 and the outer convex ring 1254 .

[0054] According to an embodiment of the present invention, the piston portion 125 is movably installed in the piston chamber 114 and divides the piston chamber 114 into a first chamber 1141 and a second chamber 1142 of variable volume; The outer cavity wall of the piston cavity 114 is provided with a first gas source hole 1143 and a second gas source hole 1144 at both ends along the central axis direction. The first cavity 1141 and the second cavity 1142 are connected to the first gas source hole 1143 and the second gas source hole 1144 respectively.

[0055] According to an embodiment of the present invention, a cavity opening 1145 is provided at the upper portion of the piston cavity 114, and the locking sleeve 12 extends out of the piston cavity 114 from the cavity opening 1145 of the piston cavity 114. The outer side surface of the locking sleeve 12 can slide relative to the top wall of the piston cavity 114, and a fourth sealing ring 1146 is nested on the side of the top wall of the piston cavity 114 facing the locking sleeve 12, so as to ensure that when the locking sleeve 12 slides relative to the top wall of the piston cavity 114, the sealing of the first cavity 1141 is maintained.

[0056] According to an embodiment of the present invention, when the connecting piece 14 is installed in the installation cavity 113, an auxiliary cavity 15 is reserved between the outer wall of the connecting piece 14 and the inner wall of the installation cavity 113; The connector body 11 is also provided with at least one connecting hole 115 connecting the auxiliary cavity 15 and the piston cavity 114; The piston portion 125 is recessed at a position corresponding to at least one connecting hole 115 to form an exhaust passage 1255; According to the active state of the piston portion 125 in the piston chamber 114 , the auxiliary chamber 15 is alternately connected with the second chamber 1142 or the exhaust channel 1255 through at least one connecting hole 115 .

[0057] It can be understood that in the initial position, the clamping assembly 13 is open, and the second sealing ring 1251 on the piston part 125 is located at the lower end of at least one connecting hole 115. At this time, at least one connecting hole 115 is connected to the atmosphere through the exhaust channel 1255, and the pressure in the auxiliary cavity 15 is zero pressure. Grab the external connector (such as the connector of the pressure gauge) and align it with the connecting piece 14 and press it downward, so that the air in the auxiliary cavity 15 is emptied through the exhaust channel 1255, and the connecting piece 14 moves to the bottom. The piston part 125 moves upward in the piston cavity 114 until the second sealing ring 1251 on the piston part 125 passes through at least one connecting hole 115. At this time, at least one connecting hole 115 is connected to the second cavity 1142, and the second cavity 1142 pressurizes the auxiliary cavity 15 through at least one connecting hole 115, and causes the connecting piece 14 to move upward.

[0058] According to an embodiment of the present invention, the outer side walls of the connecting piece 14 are respectively nested with a fifth sealing ring 144 and a sixth sealing ring 145, and the auxiliary cavity 15 is located between the fifth sealing ring 144 and the sixth sealing ring 145. The fifth sealing ring 144 and the sixth sealing ring 145 are used to ensure that the sealing of the auxiliary cavity 15 is maintained when the connecting piece 14 moves relative to the installation cavity 113.

[0059] According to an embodiment of the present invention, a first limiting shoulder 146 is provided on the outer wall of the connecting piece 14; a second limiting shoulder 1131 is provided on the inner edge of the opening of the mounting cavity 113; the first limiting shoulder 146 and the second limiting shoulder 1131 cooperate with each other to limit the length of the connecting piece 14 extending from the opening of the mounting cavity 113.

[0060] It can be understood that the connecting piece 14 can be effectively prevented from falling out of the installation cavity 113 through the cooperation between the first limiting shoulder 146 and the second limiting shoulder 1131 .

[0061] It can be understood that in other embodiments, a return spring can also be sleeved on the outside of the connecting piece 14, and the two ends of the return spring are respectively abutted between the first limit shoulder 146 and the second limit shoulder 1131. When at least one connecting hole 115 is connected to the atmosphere through the exhaust channel 1255, the auxiliary cavity 15 is at zero pressure, and the return spring provides a return force to reset the connecting piece 14 to the bottom. It should be noted that the elastic force of the return spring is less than the pressure force when the second cavity 1142 is pressurized, that is, when the auxiliary cavity 15 is connected to the second cavity 1142 through at least one connecting hole 115, the pressure force of the auxiliary cavity 15 can overcome the elastic force of the return spring to push the connecting piece 14 upward and make it fit tightly with the external joint.

[0062] It can be understood that the connector body 11 can be integrally formed or assembled with separate parts. For example, in some embodiments, in order to facilitate processing and installation, the connector body 11 may include a first body 117, a second body 118 and a third body 119, and the second body 118 and the third body 119 are respectively fixedly connected to the first body 117, and a sealing ring is provided at the fixed connection position to ensure the sealing of the connection. The second body 118 and the first body 117 are jointly enclosed to form a piston chamber 114, and the third body 119 and the first body 117 are jointly enclosed to form an installation chamber 113. The connection port 111 is provided on the first body 117; the first gas source hole 1143 and the second gas source hole 1144 are provided on the second body 118; the mounting portion 112 and the avoidance groove 116 are respectively provided on the third body 119.

[0063] It is understandable that the peripheral connector may be a connector of a pressure gauge or a pressure transmitter, but is not limited thereto.

[0064] Preferably, the clamping structure 1319 may be a threaded structure, but is not limited thereto.

[0065] When the joint connector 10 needs to clamp an external joint, the external air source supplies air to the first cavity 1141 through the first air source hole 1143, so that the pressure of the first cavity 1141 increases, and pushes the piston portion 125 of the locking sleeve 12 to move downward in the piston cavity 114, driving the first locking surface 122 of the locking sleeve 12 to move downward out of the first matching surfaces 1314 of the plurality of clamping members 131. The piston portion 125 of the locking sleeve 12 continues to move downward in the piston cavity 114, driving the second abutting portion 1212 of the locking sleeve 12 to press against the second wedge surfaces 1313 of the plurality of clamping members 131, and causing the plurality of clamping members 131 to rotate based on the mounting portion 112, and the clamping structures 1319 of the plurality of clamping members 131 gradually open. The piston part 125 of the locking sleeve 12 continues to move downward in the piston cavity 114 until the piston part 125 abuts against the bottom wall of the piston cavity 114. At this time, the second sealing ring 1251 nested in the piston part 125 is located below the at least one connecting hole 115, and the auxiliary cavity 15 is connected to the exhaust channel 1255 through the at least one connecting hole 115. Then the external connector is inserted into the opened multiple clamping members 131 and docked with the connecting hole 141 of the connecting member 14. The connecting member 14 is pressed by the external connector so that the connecting member 14 moves to the bottom end, thereby realizing the reset of the connecting member 14. During the pressing process, the volume of the auxiliary cavity 15 gradually decreases, and the excess air is smoothly discharged to the atmosphere through the at least one connecting hole 115 and the exhaust channel 1255, thereby preventing the auxiliary cavity 15 from increasing pressure due to the compressed volume, thereby hindering the reset of the connecting member 14.

[0066] After the external connector presses the connecting piece 14 to the bottom, the air supply to the first chamber 1141 is stopped, and the air is supplied to the second chamber 1142 through the second air source hole 1144, so that the pressure of the second chamber 1142 increases, and the piston portion 125 of the locking sleeve 12 is pushed to move upward in the piston chamber 114, driving the second abutting portion 1212 of the locking sleeve 12 to disengage from the second wedge surfaces 1313 of the plurality of clamping members 131, and continuing to push the piston portion 125 of the locking sleeve 12 to move upward in the piston chamber 114, driving the first abutting portion 1211 of the locking sleeve 12 to press against the first wedge surfaces 1312 of the plurality of clamping members 131, and causing the plurality of clamping members 131 to rotate based on the mounting portion 112 respectively, and the clamping structures 1319 (such as internal threads) of the plurality of clamping members 131 gradually clamp the external connector (such as external threads). Continue to push the piston portion 125 of the locking sleeve 12 upward in the piston cavity 114, driving the first abutting portion 1211 of the locking sleeve 12 to slide out from the upper edge of the first wedge surface 1312, and making the first locking surface 122 of the locking sleeve 12 correspond to the first matching surfaces 1314 of the plurality of clamping members 131. At the same time, the second locking surface 123 of the locking sleeve 12 corresponds to the second matching surfaces 1315 of the plurality of clamping members 131, thereby completing the clamping and locking of the external device connector. At this time, the second sealing ring 1251 on the piston portion 125 of the locking sleeve 12 is located above the at least one connecting hole 115, and the auxiliary chamber 15 is connected with the second chamber 1142 through the at least one connecting hole 115, and the pressurized gas in the second chamber 1142 enters the auxiliary chamber 15 through the at least one connecting hole 115, thereby pressurizing the auxiliary chamber 15, and then prompting the connecting piece 14 to press against the external connector upward, and squeeze the first sealing ring 143 to deform to achieve a sealed connection between the connecting piece 14 and the external connector.

[0067] Then, the external pipeline is opened, and the high-pressure fluid in the external pipeline continues to push the connecting piece 14 upward to fit the external connector through the pressure area difference between the upper and lower ends of the connecting piece 14, and squeezes the first sealing ring 143 to achieve a sealed connection between the connecting piece 14 and the external connector. The greater the pressure of the external pipeline, the greater the adhesion force between the connecting piece 14 and the external connector. Therefore, no matter whether the external pipeline passes high pressure or low pressure, a sealed connection between the connecting piece 14 and the external connector can be achieved.

[0068] It can be understood that the pressurization of the auxiliary cavity 15 of the present invention is completed after the multiple clamping members 131 have clamped the external connector. When the auxiliary cavity 15 is pressurized and pushes the connecting member 14 to seal against the external connector, the external connector has been firmly clamped by the multiple clamping members 131 and will not be ejected. In other words, the pressure supply to the second cavity 1142 and the auxiliary cavity 15 of the present invention is different, and the pressure supply to the auxiliary cavity 15 is delayed after the pressure supply to the second cavity 1142. Specifically, the auxiliary cavity 15 will be pressurized only when the second sealing ring 1251 of the piston part 125 moves to the top of at least one connecting hole 115, but at this time, the clamping structure 1319 of the locking sleeve 12 has firmly clamped the external machine head. The present invention cleverly realizes the integrated operation process of clamping and sealing through a single air source through the above-mentioned structural design.

[0069] The joint connector 10 of the present invention cooperates with the reverse wedge structure 1311 and the reverse abutment structure 121 to achieve rapid clamping or loosening of the external joint, replacing the traditional connection method of the external joint by rotating the thread, and effectively improving the connection efficiency of the external joint. At the same time, the present invention can ensure that after clamping the external joint, the auxiliary cavity 15 is pressurized to form a sealed connection by pressurizing the auxiliary cavity 15 through the ingenious design of the auxiliary cavity 15, the first sealing ring 143 between the connecting piece 14 and the external joint. Moreover, the present invention also uses the difference in pressure area at both ends of the connecting piece 14 to enable the connecting piece 14 to adapt to the pressure of the external pipeline to generate a corresponding clamping force on the external joint, effectively ensuring the connection sealing between the joint connector 10 and the external joint.

[0070] The fully automatic pressure gauge calibration system of the present invention replaces the traditional manual gauge calibration method, saves labor costs, and effectively improves the calibration efficiency of the pressure gauge.

[0071] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A fully automatic pressure gauge calibration system, characterized in that: The system includes: loading and unloading mechanism, verification workbench, manipulator and pressure control mechanism; Loading and unloading mechanism, used to transfer the pressure gauge to be inspected from the loading position to the meter taking position, and to transfer the inspected pressure gauge from the meter placing position to the unloading position; The calibration workbench comprises: at least one joint connector and at least one image recognition device; the joint connector is used to receive the pressure gauge grasped by the manipulator and clamp and lock it, so that the pressure gauge is sealed and connected with the calibration gas path, and release the pressure gauge after the pressure gauge completes the calibration; the image recognition module is used to collect the image of the dial information of the pressure gauge, and read the calibration indication after the image recognition processing; The manipulator is used to grab the pressure gauge to be inspected from the loading and unloading mechanism from the gauge picking position and move it to the corresponding joint connector for clamping and locking. It is also used to grab the inspected pressure gauge from the corresponding joint connector and move it to the gauge placing position; The pressure control mechanism is used to control the pressure of the calibration gas circuit to a preset calibration pressure value.

2. A fully automatic pressure gauge calibration system according to claim 1, characterized in that: The loading and unloading mechanism includes: a loading mechanism, a conveying mechanism and a unloading mechanism, and the loading mechanism and the unloading mechanism are respectively located at the input end and the output end of the conveying mechanism; A feeding mechanism, located at the feeding position, is used to sequentially feed a plurality of pre-stored pressure gauges to be inspected to the input end of the conveying mechanism; The conveying mechanism receives the pressure gauge to be inspected from the loading mechanism through the input end and transmits it to the meter-taking position to wait for the robot to grab it, and at the same time, sends the inspected pressure gauge placed by the robot at the meter-putting position to the unloading mechanism through the output end; The unloading mechanism is located at the unloading position and is used to collect the inspected pressure gauges transmitted by the conveying mechanism in sequence and unload them collectively.

3. A fully automatic pressure gauge calibration system according to claim 2, characterized in that: The feeding mechanism includes: a feeding rack, a feeding motor, a feeding transmission belt, a lead screw, a nut, and a lifting plate; The feeding motor is arranged at the bottom end of the feeding rack; the number of lead screws and nuts is an even number of more than two, and they are evenly located on both sides of the feeding rack according to the number; the nuts correspond to the lead screws one by one, and the nuts are fixedly arranged on the outer edge of the lifting plate; the feeding motor drives the lead screw to rotate through the feeding transmission belt, and drives the lifting plate to move up and down under the cooperation of the threads of the lead screw and the nut.

4. A fully automatic pressure gauge calibration system according to claim 1, characterized in that: The fully automatic pressure gauge calibration system also includes: a tray and a tray placement rack; The tray is provided with a plurality of gauge positions for placing pressure gauges; The pallet placement rack is provided with multiple layers of guide rails, and each layer of guide rails includes two parallel guide rails for guiding and supporting the pallet.

5. A fully automatic pressure gauge calibration system according to claim 4, characterized in that: The transmission mechanism includes: a transmission motor, a conveyor belt, an input mechanism, an output mechanism, a meter taking positioning mechanism, and a meter placing positioning mechanism; The conveyor motor is used to drive the conveyor belt to move and drive the tray to move from the input end to the output end; An inlet mechanism, arranged at the inlet end of the conveying mechanism, is used to pull the tray carrying the pressure gauge to be inspected out from the corresponding guide rail of the tray placement rack and shift it to the conveyor belt; The outgoing mechanism is arranged at the outgoing end of the conveying mechanism and is used to push the pallet carrying the inspected pressure gauge from the conveyor belt to the corresponding guide rail of the pallet placement rack; A gauge retrieval positioning mechanism, used to position the tray carrying the pressure gauge to be inspected, which is conveyed by the conveyor belt, at a gauge retrieval position; The anti-table positioning mechanism is used to position the empty pallet in the table placement position.

6. A fully automatic pressure gauge calibration system according to claim 5, characterized in that: The introduction mechanism comprises: a first cylinder, a first telescopic rod, a second cylinder, a second telescopic rod and a bayonet; The first telescopic rod is movably mounted in the first cylinder, and the second telescopic rod is movably mounted in the second cylinder, and the telescopic directions of the first telescopic rod and the second telescopic rod are perpendicular; The second cylinder is fixedly arranged at the free end of the first telescopic rod, and the bayonet is arranged at the free end of the second telescopic rod; The tray is provided with a card slot which cooperates with the card pin.

7. A fully automatic pressure gauge calibration system according to claim 1, characterized in that: The joint connector comprises: a connector body, a locking sleeve, and a clamping assembly; The connector body has a connection port at one end for external piping and a mounting portion at the other end for mounting the clamping assembly; The clamping assembly includes a plurality of clamping members, which are circumferentially arranged around the mounting portion of the connector body and can be rotated based on the mounting portion respectively, and the outer sides of both ends of each clamping member are provided with reverse wedge structures, and the inner side of one end of each clamping member away from the connector body is provided with a clamping structure; A locking sleeve is movably sleeved on the outer periphery of the clamping assembly and can move axially under the action of a driving force, and the locking sleeve is provided with a reverse holding structure at the position of the reverse wedge-shaped structure of the plurality of clamping members; When the locking sleeve moves axially, the corresponding abutting structure of the locking sleeve presses against the corresponding wedge-shaped structure of the clamping piece, so as to drive the multiple clamping pieces to rotate relative to the connector body respectively, and enable the clamping structures of the multiple clamping pieces to clamp or release the external connector.

8. A fully automatic pressure gauge calibration system according to claim 7, characterized in that: The reverse wedge structure includes a first wedge surface and a second wedge surface, and the first wedge surface and the second wedge surface are respectively located on the outer sides of the two ends of the clamping member and are arranged in opposite directions; the reverse abutting structure includes a first abutting portion and a second abutting portion, the first abutting portion is used to perform a wedge-shaped cooperation with the first wedge surface, and the second abutting portion is used to perform a wedge-shaped cooperation with the second wedge surface.

9. A fully automatic pressure gauge calibration system according to claim 8, characterized in that: The first abutting portion and the first wedge-shaped surface, as well as the second abutting portion and the second wedge-shaped surface, are respectively alternately wedge-matched with each other.

10. A fully automatic pressure gauge calibration system according to claim 8, characterized in that: The locking sleeve and the clamping assembly are arranged on the same central axis; The locking sleeve further includes a first locking surface, which is disposed adjacent to the lower edge of the first abutting portion; each clamping member further includes a first mating surface, which is disposed adjacent to the upper edge of the first wedge-shaped surface; when the locking sleeve locks the clamping assembly, the first locking surface abuts against the first mating surface of each clamping member to prevent each clamping member from opening outward; The first locking surface is a circular surface, the first matching surface of each clamping member is an arc surface, and the vertical lines of the first locking surface and the first matching surface respectively intersect the central axis perpendicularly.

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