A valve instrument air tightness detection equipment

Abstract

A valve instrument air tightness detection equipment includes instrument valve fixing mechanism, instrument valve positioning mechanism, valve switch mechanism and classification mechanism; instrument fixing, positioning, switch detection and classification functions are integrated, when the equipment is used, the instrument valve is placed on the conveying belt, the conveying belt drives the instrument valve to the sealing pipe, the clamping plate drives the sealing pipe to move to the middle to seal the two sides of the instrument valve, the valve internal air tightness is detected, after the detection is completed, the instrument valve positioning mechanism acts, the incomplete tooth ring is driven to rotate through the motor B action, so as to drive the instrument valve to rotate, when the valve switch rotates to the position which can be connected with the valve switch mechanism, the valve switch mechanism acts, the instrument valve external air tightness is detected, then the conveying belt continues to act, the qualified and unqualified instrument valves are sent to the classification mechanism to be classified.

Description

Technical Field

[0001] This invention relates to the field of valve testing technology, and in particular to a valve instrument airtightness testing device. Background Technology

[0002] The airtightness test mainly checks whether there is any leakage at the connection parts of the container. Valves are mostly used for connecting two sets of pipes. Therefore, the two conveying interfaces of the valve itself need to ensure good airtightness during use to ensure the sealing and integrity of the internal material conveyance. Therefore, in the production of instrument valves, the airtightness test of finished instrument valves is a common test. Thus, the use of airtightness testing equipment is also extremely important in the processing of instrument valves.

[0003] For example, Chinese invention patent CN202211369237.8 provides a valve airtightness testing fixture and testing method. The airtightness tester has a base fixedly installed on one side, and an inverted "U"-shaped bracket is fixedly connected to the top of the base. An electric telescopic rod is fixedly connected to the top of the base, and an output rod is slidably connected to the top of the electric telescopic rod. The output rod passes through the bracket, and the surface of the output rod is provided with a "C"-shaped clamping arm. This invention allows the output rod of the electric telescopic rod to slide up and down with the clamping arm, air supply pipe, and air nozzle, so that the air blown out by the air nozzle blows onto the valve body on the placement platform. At the same time, the motor in the rectangular frame drives the valve body on the placement platform to rotate at a uniform speed, so the air nozzle can evenly dry the valve body.

[0004] Through research on the above-mentioned valve airtightness testing fixture and testing method, it was found that although the above patent realizes the assembly of electronic components, it requires manual loading and unloading of instrument valves one by one, which wastes manpower.

[0005] Therefore, we urgently need to invent a valve and instrument airtightness testing device that automatically feeds valves and instruments through a conveyor belt, a fixing mechanism, and a positioning mechanism, and classifies qualified and unqualified products to improve efficiency. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a valve instrument airtightness testing device. This device integrates instrument fixing, positioning, switching detection, and classification functions by incorporating an instrument valve fixing mechanism, an instrument valve positioning mechanism, a valve switching mechanism, and a classification mechanism. In use, the instrument valve is placed on a conveyor belt. The rotating conveyor belt moves the instrument valve to the sealing tube. A clamping plate moves the sealing tube towards the center, sealing both sides of the instrument valve for internal airtightness testing. After testing, the instrument valve positioning mechanism activates, driving a motor B to rotate an incomplete gear ring, thus rotating the instrument valve. When the valve switch rotates to a position where it can engage with the valve switch mechanism, the valve switch mechanism activates to test the external airtightness of the instrument valve. The conveyor belt then continues to move, sending the qualified and unqualified instrument valves to the classification mechanism for sorting.

[0007] The technical solution used in this invention is: a valve and instrument airtightness testing device comprising: an instrument and valve fixing mechanism, an instrument and valve positioning mechanism, a valve switching mechanism, and a sorting mechanism;

[0008] The instrument valve fixing mechanism is fixed to the ground by a support frame. The instrument valve fixing mechanism has two clamps, symmetrically placed on the left and right sides of the support frame. The instrument valve positioning mechanism is located outside one clamp and is slidably connected to this clamp via a slide. The valve switching mechanism is fixed to the support frame by a bottom fixing frame and is located above the conveyor belt and the instrument valve being tested. The sorting mechanism is located at the end of the conveyor belt and is used to sort the instrument valves being tested. In use, the instrument valve is placed on the conveyor belt. The conveyor belt rotates, moving the instrument valve to the sealing tube. The clamps move the sealing tube towards the center to seal both sides of the instrument valve, performing an internal airtightness test. After the test, the instrument valve positioning mechanism activates, driving the incomplete gear ring to rotate via motor B, thus rotating the instrument valve. When the valve switch rotates to a position where it can engage with the valve switch mechanism, the valve switch mechanism activates to test the external airtightness of the instrument valve. Then, the conveyor belt continues to move, sending the qualified and unqualified instrument valves to the sorting mechanism for classification.

[0009] Furthermore, the instrument valve fixing mechanism includes: a conveyor belt, a sealing tube, a motor A, a turntable, a slider, a rack, a rotating rod, a connecting rod, a clamping plate, a support frame, an adjusting screw, a locking block, and a torsion spring A;

[0010] The conveyor belt is rotatably connected to the drive shafts on both sides of the support frame. There are two symmetrical sealing tubes, which are connected to the clamps respectively. The motor A is fixed on the extension frame at the bottom of the support frame. The turntable is rotatably connected to the motor A. The slider slides in contact with the long groove on the turntable. The rack is L-shaped, with one side toothless but with a long groove, which slides in contact with the slider. The toothed end of the rack meshes with the gear at the center of the rotating rod. Each end of the rotating rod is rotatably connected to a connecting rod, and each connecting rod is rotatably connected to the clamp. There are two sets of clamps, which slide in contact with the upright plates on the support frame respectively. The adjusting screw is installed in the long groove of the turntable. One end of the locking block is fixed to the torsion spring A, and the other end contacts the scale groove on the turntable. The torsion spring A is fixed to the extension plate of the slider.

[0011] Furthermore, the instrument valve positioning mechanism includes: a gear, a rack and pinion frame, a slide, a locking rod, a lever, a torsion spring B, an incomplete gear ring, a motor B, and a short rod;

[0012] The gear is placed on the lower part of one side of the clamping plate, and the lower part of the gear meshes with the teeth on the rack frame. The upper teeth of the gear mesh with the rack at the lower end of the slide. The rack frame is fixed on the support frame. The slide is slidably connected to the clamping plate on this side. The actuating rod is fixed on the gear shaft on the upper part of the slide. The locking rod is sleeved on the gear shaft of the slide and fixedly connected to the actuating rod through a torsion spring B. The torsion spring B is sleeved on the gear shaft of the slide and is located in the middle of the locking rod and the actuating rod. The incomplete gear ring is rotatably connected to the slide and meshes with the gear on the slide. The motor B is fixed on the extension frame of the slide. The short rod is rotatably connected to the motor B.

[0013] Furthermore, the motor B is a stepper motor.

[0014] Furthermore, the valve switching mechanism includes: an electric cylinder, a slide rod, a rotary drum, an inclined plane A, a spring-loaded inclined block, an inclined plane B, and a rotating head;

[0015] The electric cylinder is fixed to the top of the outer frame of the valve switch mechanism, and the cylinder body extension end of the electric cylinder is fixedly connected to the lower sliding rod. The sliding rod is slidably connected to the lower rotating cylinder, and the rotating cylinder is fixedly connected to the lower rotating head. The rotating head can be fixed to the valve switch. There are four sets of spring inclined blocks, which are respectively fixed on the fixed frame of the valve switch mechanism. Inclined surface A and inclined surface B are located at the lower part of the rotating cylinder, and inclined surface B is located above inclined surface A.

[0016] Furthermore, the sorting mechanism includes: a sorting slot, a sorting plate, a motor C, a shaped cam, and a tension spring;

[0017] The sorting slots are located inside the sorting mechanism and are symmetrical in two sets. The sorting plate is placed inside the mechanism and is rotatably connected to the outer shell of the sorting mechanism via a rotating shaft. The motor C is fixed on the extended plate of the outer shell. The irregularly shaped cam is rotatably connected to the motor C and slides in contact with the rotating rod on the sorting plate. One side of the tension spring is fixed on the rotating shaft of the sorting plate, and the other side is fixed on the extended plate of the outer shell.

[0018] Furthermore, the motor C starts and drives the irregularly shaped cam to rotate, thereby rotating the sorting plate and causing qualified and unqualified valves to slide into different sorting slots, thus sorting them.

[0019] Because the present invention adopts the above-described technical solution, the present invention has the following advantages:

[0020] 1) The instrument valve fixing mechanism of this equipment automatically feeds the valve via a conveyor belt. Together with the instrument valve positioning mechanism and valve opening and closing mechanism, it performs airtightness testing on the inside and outside of the valve. Under the action of the clamping plates on both sides, the valve's left and right openings are sealed with sealing tubes. The valve is rotated by the locking rod and the actuating rod to align the valve opening and closing mechanism with the valve opening and closing mechanism. The entire airtightness test does not require manual intervention, which improves the testing efficiency and accuracy.

[0021] 2) The sorting mechanism of this equipment can classify qualified and unqualified instruments and valves, eliminating the need for additional manual sorting, preventing human error in sorting, improving efficiency and reducing costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2-4 This is a schematic diagram of the instrument valve fixing mechanism of the present invention;

[0024] Figure 5-6 This is a schematic diagram of the instrument valve positioning mechanism of the present invention;

[0025] Figure 7-8 This is a schematic diagram of the valve switching mechanism of the present invention;

[0026] Figure 9 This is a schematic diagram of the classification mechanism of the present invention;

[0027] Reference numerals: 1-Instrument valve fixing mechanism; 2-Instrument valve positioning mechanism; 3-Valve switching mechanism; 4-Classification mechanism; 101-Conveyor belt; 102-Sealing tube; 103-Motor A; 104-Turntable; 105-Slider; 106-Rack; 107-Rotor; 108-Connecting rod; 109-Clamping plate; 110-Support frame; 111-Adjusting screw; 112-Positioning block; 113-Torsion spring A; 201-Gear; 202-Gear 203-Slide; 204-Positioning rod; 205-Actuating rod; 206-Torsion spring B; 207-Incomplete toothed ring; 208-Motor B; 209-Short rod; 301-Electric cylinder; 302-Slide rod; 303-Rotating drum; 304-Inclined surface A; 305-Spring inclined block; 306-Inclined surface B; 307-Rotating head; 401-Sorting slot; 402-Sorting plate; 403-Motor C; 404-Irregular cam; 405-Tension spring. Detailed Implementation

[0028] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; however, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] Examples, such as Figure 1-9 As shown, a valve instrument airtightness testing device is characterized by comprising: an instrument valve fixing mechanism 1, an instrument valve positioning mechanism 2, a valve switching mechanism 3, and a sorting mechanism 4;

[0031] The instrument valve fixing mechanism 1 is fixed to the ground by the support frame 110. The instrument valve fixing mechanism 1 has two clamps 109, which are symmetrically placed on the left and right sides of the support frame 110. The instrument valve positioning mechanism 2 is located outside one side clamp 203 and is slidably connected to the clamp 109 on this side through the slide 203. The valve switching mechanism 3 is fixed to the support frame 110 by the bottom fixing frame and is located above the conveyor belt 101 and the instrument valve under test. The sorting mechanism 4 is placed at the tail of the conveyor belt 101 and is used for sorting the instrument valve under test.

[0032] When the equipment is in use, the instrument valve is placed on the conveyor belt 101. The conveyor belt 101 rotates and moves the instrument valve to the sealing tube 102. The clamping plate 109 moves the sealing tube 102 towards the center to seal both sides of the instrument valve and perform an internal airtightness test. After the test is completed, the instrument valve positioning mechanism 2 is activated, which drives the motor B208 to rotate the incomplete gear ring 207, thereby driving the instrument valve to rotate. When the valve switch rotates to a position that can be docked with the valve switch mechanism 3, the valve switch mechanism 3 is activated to perform an external airtightness test on the instrument valve. Then the conveyor belt 101 continues to move, sending the qualified and unqualified instrument valves to the sorting mechanism 4 for sorting.

[0033] In one optional embodiment of the present invention, such as Figure 2-4 As shown, the instrument valve fixing mechanism 1 includes: a conveyor belt 101, a sealing tube 102, a motor A103, a turntable 104, a slider 105, a rack 106, a rotating rod 107, a connecting rod 108, a clamping plate 109, a support frame 110, an adjusting screw 111, a locking block 112, and a torsion spring A113.

[0034] The conveyor belt 101 is rotatably connected to the drive shafts on both sides of the support frame 110. There are two symmetrical sealing pipes 102, which are connected to the clamping plates 109 respectively. The motor A103 is fixed to the extension frame at the bottom of the support frame 110. The turntable 104 is rotatably connected to the motor A103. The slider 105 is in sliding contact with the long groove on the turntable 104. The rack 106 is L-shaped. One side of the rack is toothless but has a long groove. It is slidably connected to the slider 105 in the long groove. The toothed end of the rack 106 is connected to the rotating rod 1. The gears at the center of 07 mesh, and the two ends of the rotating rod 107 are respectively rotatably connected to a connecting rod 108. Each connecting rod 108 is rotatably connected to the clamping plate 109. There are two sets of clamping plates 109, which are slidably connected to the vertical plate on the support frame 110. The adjusting screw 111 is installed in the long groove of the turntable 104. One end of the locking block 112 is fixed to the torsion spring A113, and the other end contacts the scale groove on the turntable 104. The torsion spring A113 is fixed to the extension plate of the slider 105.

[0035] The instrument valve is conveyed to its designated position on the conveyor belt 101. The sealing pipe 102 has an air port for connecting to a pressurizing device. When the instrument valve is placed onto the conveyor belt 101, the valve tilts to the right. When the instrument valve reaches the position of the instrument valve fixing mechanism 1, the motor A103 drives the turntable 104 to rotate counterclockwise half a turn. The turntable 104 drives the slider 105 to rotate counterclockwise from right to left. The slider 105 is slidably connected to the groove at the right end of the rack 106. The slide block 105 is mounted on the support frame 110. The slide block 105 drives the rack 106 to move to the left. The rack 106 drives the gear at the lower end of the rotating rod 107 to rotate clockwise. The rotating rod 107 drives the connecting rod 108. The clamping plate 109 is slidably mounted on the support frame 110. The connecting rod 108 drives the clamping plates 109 on both sides to move towards the middle. The clamping plate 109 is rotatably connected to the sealing tube 102. The clamping plate 109 drives the sealing tube 102 to move towards the middle to seal both sides of the instrument valve. After the test is completed, the motor A103 drives the turntable. 104 continues to rotate half a turn, causing the turntable 104 to drive the slider 105 to rotate counterclockwise from left to right. The slider 105 drives the rack 106 to move to the right, and the rack 106 drives the gear at the lower end of the rotating rod to rotate counterclockwise. The rotating rod 107 drives the connecting rod 108, and the connecting rod 108 drives the clamping plates 109 on both sides to move outward. The clamping plates 109 drive the sealing tube 102 to move to both sides, releasing the instrument valve. The adjusting screw 111 is rotatably mounted on the turntable 104, and the slider 105 and the adjusting screw 111 form a screw... The dial 104 is marked with scales. Manually disengage the locking block 112 so that it is out of contact with the slot on the dial 104. Rotate the knob on the left end of the adjusting screw 111 to adjust the position of the slider 105 on the screw. This can adjust the shortest distance after the clamping plate 109 is tightened, thus adapting to instrument valves of different sizes. After adjusting to the appropriate scale, release the locking block 112. Due to the action of the torsion spring A113, the locking block 112 contacts another slot, fixing the slider 105.

[0036] In one optional embodiment of the present invention, such as Figure 5-6 As shown, the instrument valve positioning mechanism 2 includes: a gear 201, a rack frame 202, a slide 203, a locking rod 204, a toggle rod 205, a torsion spring B206, an incomplete gear ring 207, a motor B208, and a short rod 209.

[0037] Gear 201 is placed on the lower part of one side clamping plate 109, and the lower part of gear 201 meshes with the teeth on rack frame 202. The upper teeth of gear 201 mesh with the rack at the lower end of slide 203. Rack frame 202 is fixed on support frame 110. Slide 203 is slidably connected to clamping plate 109 on this side. Actuating rod 205 is fixed on the gear shaft on the upper part of slide 203. Locking rod 204 is sleeved on the gear shaft of slide 203 and fixedly connected to actuating rod 205 through torsion spring B206. Torsion spring B206 is sleeved on the gear shaft of slide 203 and located in the middle of locking rod 204 and actuating rod 205. Incomplete gear ring 207 is rotatably connected to slide 203 and meshes with the gear on slide 203. Motor B208 is fixed on the extension frame of slide 203. Short rod 209 is rotatably connected to motor B208.

[0038] When the clamping plate 109 moves towards the center, causing the sealing tube 102 to seal the instrument valve, the clamping plate 109 drives the gear 201 to move to the right. Since the rack frame 202 on the support frame 110 meshes with the gear 201 at the lower end of the clamping plate 109, the gear 201 on the clamping plate 109 rotates during movement. Simultaneously, the gear 201 on the clamping plate 109 meshes with the rack at the lower end of the slide 203. The gear 201 on the clamping plate 109 drives the rack at the lower end of the slide 203 towards the instrument valve, thereby causing the locking rod on the slide 203 to... 204 and the actuating lever 205 are inserted into both sides of the valve switch. The locking lever 204 is rotatably mounted on the rotating shaft of the actuating lever 205. The locking lever 204 and the actuating lever 205 are fixedly connected by a torsion spring B206. A gear is fixedly mounted on one side of the actuating lever 205, and the gear on the actuating lever 205 meshes with the incomplete gear ring 207. The motor B208 drives the short rod 209 to rotate, and the short rod 209 drives the sliding rod on the incomplete gear ring 207 to rotate, thereby causing the incomplete gear ring 207 to rotate clockwise. 7. The gear on the actuating lever 205 rotates at a certain angle. Due to the action of the torsion spring B206, the actuating lever 205 drives the locking lever 204 to rotate together, and the actuating lever 205 drives the valve switch to rotate. When the locking lever 204 rotates to the locking plate 204 on the clamping plate 109, the locking lever 204 stops rotating, and the actuating lever 205 continues to rotate. When the actuating lever 205 and the locking lever 204 move the valve switch to vertical position, the motor B208 stops working, and then the airtightness test is performed. After the test is completed, the motor B208 drives... The short lever 209 continues to rotate, driving the sliding rod on the incomplete gear ring 207 to rotate, thereby causing the incomplete gear ring 207 to rotate counterclockwise, thus resetting the actuating lever 205; then the clamping plate 109 moves outward, the rack frame 202 drives the gear 201 on the clamping plate 109 to rotate, the gear 201 on the clamping plate 109 drives the rack on the slide 203 to rotate, thereby causing the actuating lever 205 and the locking lever 204 on the slide 203 to be pulled out from the conveyor belt 101, and then the conveyor belt 101 continues to convey.

[0039] In one optional embodiment of the present invention, such as Figure 7-8 As shown, the valve switching mechanism 3 includes: an electric cylinder 301, a slide rod 302, a rotary drum 303, an inclined plane A 304, a spring inclined block 305, an inclined plane B 306, and a rotating head 307;

[0040] The electric cylinder 301 is fixed to the top of the outer frame of the valve switch mechanism 3, and the cylinder body extension end of the electric cylinder 301 is fixedly connected to the lower slide rod 302. The slide rod 302 is slidably connected to the lower rotating drum 303. The rotating drum 303 is fixedly connected to the lower rotating head 307. The rotating head 307 can be fixed to the valve switch. There are four sets of spring inclined blocks 305, which are fixed on the fixed frame of the valve switch mechanism 3 respectively. Inclined surface A304 and inclined surface B306 are located at the lower part of the rotating drum 303, and inclined surface B306 is located above inclined surface A304.

[0041] When the lever 205 and the locking lever 204 move the valve switch to the vertical position, the initial state of the valve switch is open. Pressure is applied from the gas cylinder to the air inlet on the sealed cylinder, and the external airtightness of the instrument valve is detected by the change in the pressure gauge. The pressure is then restored. When it is necessary to test the internal airtightness, the electric cylinder 301 drives the sliding rod 302 downwards. Due to the spring force, the sliding rod 302 drives the rotating drum 303 downwards, causing the rotating drum 303 to deflect obliquely. Surface A304 pushes the spring inclined block 305 outward. When the rotating drum 303 is pressed down until the inclined surface B306 contacts the spring inclined block 305, the spring inclined block 305 moves inward and locks the rotating drum 303. After the rotating head 307 on the rotating drum 303 contacts the valve switch, the electric cylinder 301 continues to press down the slide rod 302. The protrusion on the slide rod 302 engages with the threaded groove on the rotating drum 303. The slide rod 302 moves down as the rotating drum 303 moves, and the slide rod 302 drives... Rotating drum 303 rotates, and rotating head 307 drives the valve switch to rotate, closing the valve. Pressure is applied through the gas cylinder to the air inlet on the sealed cylinder, and the internal airtightness of the instrument valve is detected by the change in the pressure gauge. Then, the telescopic rod of electric cylinder 301 retracts. Because spring wedge 305 holds rotating drum 303 in place, electric cylinder 301 drives sliding rod 302 to move upward. Then, the protrusion of sliding rod 302 cooperates with the threaded groove on rotating drum 303 to drive rotating drum 303 to rotate, resetting the valve switch. Then, sliding rod 302 continues to move upward. When sliding rod 302 reaches the uppermost end of the groove on rotating drum 303, it drives rotating drum 303 to move upward. The inclined surface B306 of rotating drum 303 pushes spring wedge 305 outward, and rotating drum 303 drives rotating head 307 to disengage from valve switch. The inclination angle of inclined surface B306 is smaller than that of inclined surface A304, which facilitates the downward pressing of rotating drum 303 and effectively prevents rotating drum 303 from being pulled upward before rotation.

[0042] In one optional embodiment of the present invention, such as Figure 9 As shown, the sorting mechanism 4 includes: a sorting slot 401, a sorting plate 402, a motor C 403, a shaped cam 404, and a tension spring 405;

[0043] There are two sets of symmetrical sorting slots 401 inside the sorting mechanism 4. The sorting plate 402 is placed inside the mechanism and is rotatably connected to the outer shell of the sorting mechanism 4 through a rotating shaft. The motor C403 is fixed on the extended plate of the outer shell. The irregular cam 404 is rotatably connected to the motor C403 and slides in contact with the rotating rod on the sorting plate 402. One side of the tension spring 405 is fixed on the rotating shaft of the sorting plate 402, and the other side is fixed on the extended plate of the outer shell.

[0044] When the instrument valve is qualified, the instrument valve on the conveyor belt 101 falls into the sorting groove 401 and slides to the right along the sorting plate 402. When the instrument valve is unqualified, the motor C403 drives the irregular cam 404 to rotate. Due to the action of the tension spring 405, the sorting plate 402 rotates clockwise around the axis by a certain angle, and the instrument valve on the conveyor belt 101 falls into the sorting groove 401 and slides to the left along the sorting plate 402.

Claims

1. A valve and instrument airtightness testing device, characterized in that, include: Instrument valve fixing mechanism (1), instrument valve positioning mechanism (2), valve switching mechanism (3) and sorting mechanism (4); The instrument valve fixing mechanism (1) is fixed to the ground by a support frame (110). The instrument valve fixing mechanism (1) has two clamps (109) and is symmetrically placed on the left and right sides of the support frame (110). The instrument valve positioning mechanism (2) is located outside one side clamp (109) and is slidably connected to this side clamp (109) by a slide (203). The valve switching mechanism (3) is fixed to the support frame (110) by a bottom fixing frame and is located above the conveyor belt (101) and the instrument valve to be tested. The sorting mechanism (4) is located at the end of the conveyor belt (101) and is used for sorting the instrument valve to be tested. When the equipment is in use, the instrument valve is placed on the conveyor belt (101). The conveyor belt (101) rotates and drives the instrument valve to the sealing tube (102). The clamp (109) drives the sealing tube (102) to move towards the middle to seal both sides of the instrument valve and perform internal air tightness testing. After the test is completed, the instrument valve positioning mechanism (2) is activated. The motor B (208) is activated to drive the incomplete gear ring (207) to rotate, thereby driving the instrument valve to rotate. When the valve switch rotates to the position where it can be docked with the valve switch mechanism (3), the valve switch mechanism (3) is activated to test the external air tightness of the instrument valve. Then the conveyor belt (101) continues to move and sends the qualified and unqualified instrument valves to the classification mechanism (4) for classification. The instrument valve fixing mechanism (1) includes: a conveyor belt (101), a sealing tube (102), a motor A (103), a turntable (104), a slider (105), a rack (106), a rotating rod (107), a connecting rod (108), a clamping plate (109), a support frame (110), an adjusting screw (111), a locking block (112), and a torsion spring A (113). The conveyor belt (101) is rotatably connected to the drive shafts on both sides of the support frame (110). There are two sealing tubes (102) that are symmetrical and connected to the clamps (109) respectively. The motor A (103) is fixed on the extension frame at the bottom of the support frame (110). The turntable (104) is rotatably connected to the motor A (103). The slider (105) is in sliding contact with the long groove on the turntable (104). The rack (106) is L-shaped. One side of the rack is toothless but has a long groove. The long groove is slidably connected to the slider (105). The toothed end of the rack (106) is connected to the rotating rod ( 107) The gears at the center mesh, and the two ends of the rotating rod (107) are respectively rotatably connected to a connecting rod (108). Each connecting rod (108) is rotatably connected to a clamping plate (109). There are two sets of clamping plates (109), which are slidably connected to the upright plate on the support frame (110). The adjusting screw (111) is installed in the long groove of the turntable (104). One end of the locking block (112) is fixed on the torsion spring A (113), and the other end is in contact with the scale groove on the turntable (104). The torsion spring A (113) is fixed on the extension plate of the slider (105).

2. The valve and instrument airtightness testing device according to claim 1, characterized in that, The instrument valve positioning mechanism (2) includes: a gear (201), a rack frame (202), a slide (203), a locking rod (204), a toggle rod (205), a torsion spring B (206), an incomplete gear ring (207), a motor B (208), and a short rod (209). The gear (201) is placed on the lower part of one side clamp (109), and the lower part of the gear (201) meshes with the teeth on the rack frame (202). The upper teeth of the gear (201) mesh with the rack at the lower end of the slide (203). The rack frame (202) is fixed on the support frame (110). The slide (203) is slidably connected to the clamp (109) on this side. The actuating rod (205) is fixed on the gear shaft on the upper part of the slide (203). The locking rod (204) is sleeved on the slide (203). 3) The gear shaft is fixedly connected to the actuating rod (205) via a torsion spring B (206). The torsion spring B (206) is sleeved on the gear shaft of the slide (203) and located in the middle of the locking rod (204) and the actuating rod (205). The incomplete gear ring (207) is rotatably connected to the slide (203) and meshes with the gear on the slide (203). The motor B (208) is fixed on the extension frame of the slide (203). The short rod (209) is rotatably connected to the motor B (208).

3. The valve and instrument airtightness testing device according to claim 2, characterized in that, The motor B (208) is a stepper motor.

4. The valve and instrument airtightness testing device according to claim 1, characterized in that, The valve switching mechanism (3) includes: an electric cylinder (301), a slide rod (302), a rotary drum (303), an inclined plane A (304), a spring inclined block (305), an inclined plane B (306), and a rotating head (307); The electric cylinder (301) is fixed on the top of the outer frame of the valve switch mechanism (3), and the cylinder body extension end of the electric cylinder (301) is fixedly connected to the slide rod (302) on the lower side. The slide rod (302) is slidably connected to the lower rotating cylinder (303). The rotating cylinder (303) is fixedly connected to the lower rotating head (307). The rotating head (307) can be fixed with the valve switch. There are four sets of spring inclined blocks (305), which are fixed on the fixed frame of the valve switch mechanism (3). The inclined surface A (304) and inclined surface B (306) are located at the lower part of the rotating cylinder (303), and the inclined surface B (306) is located above the inclined surface A (304).

5. A valve instrument airtightness testing device according to any one of claims 1-4, characterized in that, The sorting mechanism (4) includes: a sorting slot (401), a sorting plate (402), a motor C (403), a shaped cam (404), and a tension spring (405). The sorting slots (401) are inside the sorting mechanism (4), and there are two sets of symmetrical ones. The sorting plate (402) is placed inside the mechanism and is rotatably connected to the outer shell of the sorting mechanism (4) through a rotating shaft. The motor C (403) is fixed on the outer shell protrusion plate. The irregular cam (404) is rotatably connected to the motor C (403) and slides in contact with the rotating rod on the sorting plate (402). One side of the tension spring (405) is fixed on the rotating shaft of the sorting plate (402), and the other side is fixed on the outer shell protrusion plate.

6. The valve and instrument airtightness testing device according to claim 5, characterized in that, The motor C (403) starts and drives the irregular cam (404) to rotate, thereby causing the sorting plate (402) to rotate, and the qualified and unqualified valves slide into different sorting slots (401) respectively, thus sorting them.

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