A constant pressure test bench for safety valve

Abstract

The invention discloses a constant pressure calibration bench for a safety valve, and the invention relates to the technical field of safety valve calibration. When the safety valve is closed, in order to avoid damaging the inner wall of the safety valve, a rubber material is usually used to contact the inner wall of the safety valve, resulting in that during the pressurization process, the rubber material is affected by the continuous increase of internal air pressure, and the bottom of the rubber material has no support, so that the rubber material is deformed, and a gap appears between the rubber material and the inner wall of the safety valve, which affects the accuracy of the constant pressure calibration. When the safety valve is closed, the sealing ring is supported by a threaded ring and a curved plate, so that the sealing ring is supported at a contact position between the rubber ring and the inner wall of the safety valve, and a certain degree of supporting force is provided for the threaded ring, so that the sealing ring and the rubber ring cooperate with each other, so that when pressurization, the contact position between the rubber ring and the inner wall of the safety valve is prevented from leaking when the air pressure increases, which affects the constant pressure calibration of the safety valve.

Description

Technical Field

[0001] The invention relates to the technical field of safety valve calibration, in particular to a constant pressure calibration bench for a safety valve. Background Art

[0002] At present, the constant pressure calibration of safety valves refers to an important test and calibration work for safety valves. Its main purpose is to ensure that the safety valves can work normally under the specified pressure. Specifically, it includes verifying at what pressure the safety valve opens, so as to ensure that the equipment can release pressure in time when the set pressure is exceeded, and to ensure that the opening pressure of the safety valve meets the requirements of relevant standards and specifications. The constant pressure calibration bench of safety valves is a device specially used for constant pressure calibration of safety valves.

[0003] In order to avoid damaging the inner wall of the safety valve when closing the safety valve, rubber material is usually used to contact the inner wall of the safety valve. As a result, during the pressurization process, the rubber material is affected by the increasing internal air pressure. The bottom of the rubber material has no support, causing the rubber material to deform and a gap to appear between the rubber material and the inner wall of the safety valve, affecting the accuracy of the constant pressure calibration. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a constant pressure test bench for a safety valve, comprising:

[0005] A frame, an air pump is fixedly installed on the inner wall of the frame, an output end of the air pump is fixedly connected to an air guide pipe, and the frame is composed of a frame and a pulley, and the pulley is symmetrically installed at the bottom of the frame;

[0006] A fixing mechanism, which is fixedly mounted on the top of the frame, and an anti-deflection mechanism is fixedly mounted on the top of the fixing mechanism;

[0007] A pressurizing mechanism, which is used to close the connection end of the safety valve and input the air pressure output by the air pump into the interior of the safety valve, and the bottom end of the pressurizing mechanism is fixedly connected to a pressure gauge, and the pressurizing mechanism is fixedly installed on the top of the frame;

[0008] Wherein, the pressurizing mechanism also includes a connecting cover, the inner wall of the connecting cover is fixedly connected with a threaded barrel, the outer surface of the threaded barrel is threadedly connected with a threaded ring, the top of the threaded ring is slidably connected with a curved plate, the curved plate is symmetrically installed on the top of the threaded ring, the curved plate is an elastic plate, and the top of the curved plate is fixedly connected with a sealing ring. When the safety valve is closed by the sealing ring, the sealing ring is supported by the threaded ring and the curved plate at the contact position between the rubber ring and the inner wall of the safety valve, providing a certain degree of supporting force for the threaded ring, so that the sealing ring and the rubber ring cooperate with each other to avoid leakage at the contact position between the rubber ring and the inner wall of the safety valve when pressurizing, which affects the constant pressure calibration of the safety valve. The inner wall of the threaded barrel is fixed A fixing cylinder is connected, an air outlet is fixedly connected to the inner wall of the fixing cylinder, an oblique groove block is fixedly connected to the outer surface of the air outlet, the oblique groove block is symmetrically arranged on the outer surface of the air outlet, an oblique groove is opened on the outer surface of the oblique groove block, a rubber ring is slidably connected to the oblique groove of the oblique groove block, a spring block is fixedly connected to the top of the rubber ring, the spring block is symmetrically installed on the top of the rubber ring, and the spring block contacts the inner wall of the safety valve through the cooperation of the spring block and the oblique groove block. When the safety valve is fixed, the rubber ring is driven to slide downward along the oblique groove of the oblique groove block, so that the rubber ring becomes larger, the contact pressure between the rubber ring and the inner wall of the safety valve is increased, the pressure value of the rubber ring deformation during pressurization is increased, the leakage is avoided, and the reliability of the calibration of the set pressure value is improved.

[0009] Preferably, the inner wall of the connecting cover is fixedly connected with bolts, and the bolts are symmetrically installed on the inner wall of the connecting cover. The connecting cover is symmetrically installed with the top of the frame through the bolts, and the bottom of the fixed cylinder is fixedly connected with a connecting valve, one end of the connecting valve is fixedly connected to the end of the air guide tube away from the air pump, and the other end of the connecting valve is fixedly connected to the input end of the pressure gauge, and the pressure gauge is connected to the inside of the safety valve through the connecting valve, so that the measured value is more accurate.

[0010] Preferably, the fixing mechanism includes an electric disk, the outer surface of the electric disk is symmetrically provided with clamping grooves, a bottom block is slidably connected in the clamping groove of the electric disk, the electric disk is electrically controlled internally so that the bottom block can slide in the clamping groove of the electric disk, the top of the bottom block is fixedly connected with a clamping block, the outer surface of the clamping block is fixedly connected with a protrusion, the support between the protrusion and the chuck is coordinated with the electric disk to control the pressure of the clamping block on the safety valve, so that the safety valve is more firmly fixed in the verification platform to avoid accidental falling off of the safety valve during verification, the outer surface of the clamping block is provided with a sliding groove, and the outer surface of the clamping block is symmetrically provided with a shaft sleeve, the top of the electric disk is rotatably connected with the chuck, the outer surface of the chuck is provided with a clamping groove, and the clamping groove of the chuck fits with the outer surface of the protrusion.

[0011] Preferably, a slide plate is slidably connected to the slide groove of the clamping block, and a slide column is fixedly connected to the outer surface of the slide plate, the slide column slides on the outer surface of the slide plate, and the outer surface of the slide column is slidably connected to the inner wall of the shaft sleeve of the clamping block, and a spring is fixedly connected to the shaft sleeve of the clamping block. Through the deformation of the spring, the slide plate is slidably adjusted according to different protrusions of parts on the surface of the safety valve when contacting the surface of the safety valve, so as to avoid the safety valve being fixed with a reduced contact area due to the protruding shape of the safety valve, resulting in loose fixation and affecting the fixing effect of the safety valve and the calibration platform. The spring is symmetrically arranged on the outer surface of the clamping block, and one end of the spring away from the clamping block shaft sleeve is fixedly connected to the outer surface of the slide column.

[0012] Preferably, the anti-bias mechanism includes a fixed block, and the fixed block is symmetrically installed on the top of the electric disk, a connecting plate is provided on the top of the fixed block, and a threaded plate is fixedly connected to the top of the fixed block through the connecting plate, a thread is provided on the outer surface of the threaded plate, and a sliding groove is provided on the outer surface of the threaded plate, the outer surface of the threaded plate is threadedly connected to a screw ring, and a slider is slidably connected to the sliding groove of the threaded plate.

[0013] The top of the sliding block is rotatably connected to the inner wall of the sliding block, and the top of the sliding block is fitted with the bottom of the screw ring. The outer surface of the sliding block is fixedly connected to the rubber plate, and the rubber plate is deformed and bent inwardly to clamp the rubber plate during the rotation of the sliding block and the rotating plate, so as to contact the surface of the safety valve. In the same horizontal plane, the same force is applied inwardly in different directions to make the safety valve maintain a vertical direction with the horizontal plane of the inspection table after being fixed, so as to avoid the safety valve still having a slight angle tilt after being fixed, resulting in incomplete closure between the safety valve and the inspection table due to the angle tilt when the closed safety valve is pressurized and tested, so that the safety valve cannot be tested at a constant pressure. The rotating shaft of the rotating arm is rotatably connected to the rotating plate, and the end of the rotating plate away from the rotating arm is rotatably connected to a groove block, the groove block is fixedly connected to the outer surface of the threaded plate, the outer surface of the rotating plate is fixedly connected to one end of the rubber plate, and an elastic plate is fixedly connected between the rotating plate and the rotating arm.

[0014] The present invention provides a constant pressure test bench for a safety valve, which has the following beneficial effects:

[0015] 1. The sealing ring, when closing the safety valve, is supported by the threaded ring and the curved plate so that the sealing ring is supported at the contact position between the rubber ring and the inner wall of the safety valve, providing a certain degree of supporting force for the threaded ring so that the sealing ring and the rubber ring cooperate with each other to avoid leakage at the contact position between the rubber ring and the inner wall of the safety valve when pressurization occurs when the air pressure increases, thereby affecting the constant pressure calibration of the safety valve.

[0016] Second, the chute block, through the cooperation between the spring block and the chute block, makes the spring block contact the inner wall of the safety valve. When the safety valve is fixed, it drives the rubber ring to slide down along the chute of the chute block, so that the rubber ring becomes larger, and the contact pressure between the rubber ring and the inner wall of the safety valve is increased, thereby increasing the pressure value of the rubber ring to produce deformation when pressurized, avoiding the occurrence of air leakage, and improving the reliability of the calibration of the set pressure value.

[0017] 3. The spring, through the deformation of the spring, allows the slide plate to slide and adjust according to the different protrusions of the surface parts of the safety valve when it contacts the surface of the safety valve, so as to avoid the protrusion shape of the safety valve causing the contact area of ​​the safety valve to be reduced when it is fixed, resulting in loose fixation and affecting the fixing effect of the safety valve and the calibration platform.

[0018] Fourth, the rubber plate is deformed and bent inwardly to clamp the rubber plate during the rotation of the rotating arm and the rotating plate, contacting the surface of the safety valve. In the same horizontal plane, the same force is applied inwardly in different directions, so that the safety valve can maintain a vertical direction with the horizontal plane of the calibration table after being fixed, avoiding the safety valve from being tilted at a slight angle after being fixed, resulting in incomplete closure between the safety valve and the calibration table due to the tilted angle when the closed safety valve is pressurized for calibration, making it impossible to perform constant pressure calibration on the safety valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the external structure of a constant pressure test bench for a safety valve of the present invention;

[0020] Figure 2 A side view of a constant pressure test bench structure of a safety valve of the present invention;

[0021] Figure 3 It is a schematic diagram of the positional relationship between the fixing mechanism and the pressurizing mechanism of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the fixing mechanism of the present invention;

[0023] Figure 5 It is a partial structural schematic diagram of the fixing mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the anti-deflection mechanism of the present invention;

[0025] Figure 7 It is a partial structural schematic diagram of the anti-deflection mechanism of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the pressurizing mechanism of the present invention;

[0027] Fig. 9 It is a partial structural schematic diagram of the pressurizing mechanism of the present invention.

[0028] In the figure: 1, frame; 2, fixing mechanism; 3, pressurizing mechanism; 4, anti-bias mechanism; 5, air pump; 6, barometer; 7, air guide tube; 11, frame; 12, pulley; 21, electric disk; 22, clamping block; 23, chuck; 24, bottom block; 25, protrusion; 26, slide plate; 27, slide column; 28, spring; 301, connecting cover; 302, threaded cylinder; 303, connecting valve; 304, bolt; 305, air outlet; 306, threaded ring; 307, fixing cylinder; 308, curved plate; 309, sealing ring; 310, rubber ring; 311, spring block; 312, inclined groove block; 41, screw ring; 42, threaded plate; 43, fixing block; 44, slider; 45, groove block; 46, elastic plate; 47, rotating plate; 48, rubber plate; 49, rotating arm. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0030] The first embodiment, as Figures 1 to 3 and Figures 8 to 9 As shown, the present invention provides a technical solution: a constant pressure test bench for a safety valve, comprising:

[0031] The frame 1 has an air pump 5 fixedly mounted on its inner wall, an air guide tube 7 fixedly connected to the output end of the air pump 5, and the frame 1 is composed of a frame 11 and a pulley 12, and the pulley 12 is symmetrically mounted at the bottom of the frame 11;

[0032] A fixing mechanism 2, the fixing mechanism 2 is fixedly mounted on the top of the frame 1, and an anti-deflection mechanism 4 is fixedly mounted on the top of the fixing mechanism 2;

[0033] A pressurizing mechanism 3, which is used to close the connection end of the safety valve and input the air pressure output by the air pump 5 into the interior of the safety valve, and the bottom end of the pressurizing mechanism 3 is fixedly connected to a pressure gauge 6, and the pressurizing mechanism 3 is fixedly installed on the top of the frame 1;

[0034] The pressurizing mechanism 3 further comprises a connecting cover 301, the inner wall of the connecting cover 301 is fixedly connected with a threaded barrel 302, the outer surface of the threaded barrel 302 is threadedly connected with a threaded ring 306, the top of the threaded ring 306 is slidably connected with a curved plate 308, the curved plate 308 is symmetrically installed on the top of the threaded ring 306, the curved plate 308 is an elastic plate, the top of the curved plate 308 is fixedly connected with a sealing ring 309, the worker rotates the threaded ring 306 in the pressurizing mechanism 3, so that the threaded ring 306 moves upward under the restriction of the threaded barrel 302, so that the threaded ring 306 drives the curved plate 308 to move upward, drives the sealing ring 309 to move upward, contacts the inner wall of the safety valve through the sealing ring 309, and rotates the threaded ring 306 until the sealing ring 309 is tightly against the bottom of the rubber ring 310. , providing support for the bottom of the rubber ring 310, the inner wall of the threaded cylinder 302 is fixedly connected with a fixed cylinder 307, the inner wall of the fixed cylinder 307 is fixedly connected with an air outlet cylinder 305, the outer surface of the air outlet cylinder 305 is fixedly connected with an inclined groove block 312, the inclined groove block 312 is symmetrically arranged on the outer surface of the air outlet cylinder 305, the outer surface of the inclined groove block 312 is provided with an inclined groove, the inclined groove of the inclined groove block 312 is slidably connected with the rubber ring 310, the top of the rubber ring 310 is fixedly connected with a spring block 311, the spring block 311 is symmetrically installed on the top of the rubber ring 310, the rubber ring 310 is pressed by the spring block 311 to slide downward in the inclined groove of the inclined groove block 312, so that the rubber ring 310 is deformed and expanded during the downward sliding process, and fits with the inner wall of the valve body of the safety valve.

[0035] The inner wall of the connecting cover 301 is fixedly connected with bolts 304, and the bolts 304 are symmetrically installed on the inner wall of the connecting cover 301. The connecting cover 301 is symmetrically installed with the top of the frame 11 through the bolts 304. The bottom of the fixed cylinder 307 is fixedly connected with a connecting valve 303. One end of the connecting valve 303 is fixedly connected to the end of the air guide pipe 7 away from the air pump 5. The worker starts the air pump 5, so that the air pump 5 passes the gas into the fixed cylinder 307 through the air guide pipe 7 through the connecting valve 303. Then the fixed cylinder 307 gradually passes the air into the safety valve through the air outlet cylinder 305, so that the air pressure in the safety valve is increased. At the same time, the air pressure in the safety valve is measured by the barometer 6, and the other end of the connecting valve 303 is fixedly connected to the input end of the barometer 6.

[0036] The second embodiment is based on the first embodiment. Figures 4 to 5As shown, the fixing mechanism 2 includes an electric disk 21, and the outer surface of the electric disk 21 is symmetrically provided with clamping grooves, and a bottom block 24 is slidably connected in the clamping groove of the electric disk 21. The electric disk 21 is electrically controlled internally, so that the bottom block 24 can slide in the clamping groove of the electric disk 21, and the bottom of the flange at the connecting end of the safety valve is supported by the slide plate 26, so that the safety valve is placed in the inspection table. After the safety valve is placed, the worker starts the electric disk 21, so that the electric disk 21 drives the bottom block 24 to slide inward, drives the clamping block 22 to clamp the flange of the safety valve inward, and the bottom block 24 A clamping block 22 is fixedly connected to the top, a protrusion 25 is fixedly connected to the outer surface of the clamping block 22, a sliding groove is provided on the outer surface of the clamping block 22, and a shaft sleeve is symmetrically arranged on the outer surface of the clamping block 22. A chuck 23 is rotatably connected to the top of the electric disk 21, and a groove is provided on the outer surface of the chuck 23. The groove of the chuck 23 fits with the outer surface of the protrusion 25. After clamping, the worker rotates the chuck 23 to make the groove plate of the chuck 23 press against the protrusion 25, and transmits the pressure to the clamping block 22 through the protrusion 25, thereby providing a certain supporting force for the clamping block 22.

[0037] A slide plate 26 is slidably connected to the slide groove of the clamping block 22, and a slide column 27 is fixedly connected to the outer surface of the slide plate 26. The slide column 27 slides on the outer surface of the slide plate 26, and the outer surface of the slide column 27 is slidably connected to the inner wall of the sleeve of the clamping block 22. A spring 28 is fixedly connected to the sleeve of the clamping block 22. During the clamping process, since different parts are arranged on the outer surface of the safety valve, after the slide plate 26 contacts the parts on the surface of the safety valve, the slide plate 26 slides in the clamping block 22, so that the spring 28 is stretched for adjustment. The spring 28 is symmetrically arranged on the outer surface of the clamping block 22, and one end of the spring 28 away from the sleeve of the clamping block 22 is fixedly connected to the outer surface of the slide column 27.

[0038] The third embodiment is based on the first and second embodiments. Figure 6 to Figure 7 As shown, the anti-deviation mechanism 4 includes a fixed block 43, and the fixed block 43 is symmetrically installed on the top of the electric disk 21. A connecting plate is provided on the top of the fixed block 43. The top of the fixed block 43 is fixedly connected to a threaded plate 42 through the connecting plate. The outer surface of the threaded plate 42 is provided with threads, and the outer surface of the threaded plate 42 is provided with a slide groove. When a worker rotates the screw ring 41 in the anti-deviation mechanism 4, the screw ring 41 moves downward on the surface of the threaded plate 42, and the slider 44 is pressed to slide downward on the inner wall of the threaded plate 42, so that the rotating arm 49 and the rotating plate 47 rotate. The outer surface of the threaded plate 42 is threadedly connected to the screw ring 41, and the slider 44 is slidably connected to the slide groove of the threaded plate 42.

[0039] The inner wall of the slider 44 is rotatably connected to a swivel arm 49, and a swivel shaft is provided at one end of the swivel arm 49 away from the slider 44, the top of the slider 44 fits with the bottom of the screw ring 41, and a rubber plate 48 is fixedly connected to the outer surface of the swivel arm 49, and a swivel plate 47 is rotatably connected at the swivel shaft of the swivel arm 49, and a groove block 45 is rotatably connected to one end of the swivel plate 47 away from the swivel arm 49. During the rotation of the swivel arm 49 and the swivel plate 47, the elastic plate 46 is deformed and bent, and at the same time, the rubber plate 48 is deformed and protrudes inward, and is clamped inward at the same time, and contacts the outer surface of the safety valve through the rubber plate 48. The safety valve is straightened through cooperation, so that the safety valve and the inspection platform remain vertical, the groove block 45 is fixedly connected to the outer surface of the threaded plate 42, the outer surface of the swivel plate 47 is fixedly connected to one end of the rubber plate 48, and an elastic plate 46 is fixedly connected between the swivel plate 47 and the swivel arm 49.

[0040] When in use, a worker places the safety valve on the top of the inspection bench, and after placing the safety valve on the top of the fixing mechanism 2, the worker starts the fixing mechanism 2 so that the fixing mechanism 2 fixes the flange of the safety valve. Then the worker adjusts the anti-deviation mechanism 4 so that the anti-deviation mechanism 4 synchronously clamps inward on the outer surface of the safety valve, and cooperates with the fixing mechanism 2 to fix the safety valve. Then the worker adjusts the pressurizing mechanism 3 so that the pressurizing mechanism 3 closes the connecting end of the safety valve. Then the worker starts the air pump 5, and passes the air output by the air pump 5 through the pressurizing mechanism 3 into the safety valve through the air duct 7. At the same time, the air pressure inside the safety valve is measured by the barometer 6.

[0041] When the worker puts the safety valve into the inspection bench, the slide plate 26 in the fixing mechanism 2 is supported at the bottom of the flange at the connecting end of the safety valve, so that the safety valve is put into the inspection bench. After the safety valve is put in, the worker starts the electric disk 21, so that the electric disk 21 drives the bottom block 24 to slide inward, and drives the clamping block 22 to clamp the flange of the safety valve inward. After clamping, the worker rotates the chuck 23, so that the groove plate of the chuck 23 presses the protrusion 25, and transmits the pressure to the clamping block 22 through the protrusion 25, so as to provide a certain supporting force for the clamping block 22. At the same time, in the process of clamping, since different parts are arranged on the outer surface of the safety valve, at this time, after the slide plate 26 contacts the parts on the surface of the safety valve, the slide plate 26 slides in the clamping block 22, so that the spring 28 is stretched for adjustment.

[0042] After the fixing mechanism 2 clamps the flange of the safety valve, the worker rotates the screw ring 41 in the anti-deviation mechanism 4 to make the screw ring 41 move downward on the surface of the threaded plate 42, and compresses the slider 44 to slide downward on the inner wall of the threaded plate 42, so that the rotating arm 49 and the rotating plate 47 rotate. During the rotation of the rotating arm 49 and the rotating plate 47, the elastic plate 46 is deformed and bent, and the rubber plate 48 is deformed to protrude inward and clamped inward at the same time, contacting the outer surface of the safety valve through the rubber plate 48, and the safety valve is straightened through cooperation, so that the safety valve and the inspection platform remain vertical.

[0043] When the safety valve is fixed, the spring block 311 in the pressurizing mechanism 3 contacts the inner wall of the safety valve, and the spring block 311 presses the rubber ring 310 to slide downward in the inclined groove of the inclined groove block 312, so that the rubber ring 310 expands and deforms during the downward sliding process, and fits with the inner wall of the valve body of the safety valve. Then, the worker rotates the threaded ring 306 in the pressurizing mechanism 3, so that the threaded ring 306 moves upward under the restriction of the threaded cylinder 302, so that the threaded ring 306 drives the curved plate 308 to move upward, driving the sealing ring 309 Move upward, contact the inner wall of the safety valve through the sealing ring 309, rotate the threaded ring 306 until the sealing ring 309 is close to the bottom of the rubber ring 310, and provide support for the bottom of the rubber ring 310. Then the worker starts the air pump 5, so that the air pump 5 passes the gas through the air guide pipe 7 through the connecting valve 303 to the fixed cylinder 307. Then the fixed cylinder 307 gradually passes the air into the safety valve through the air outlet cylinder 305, so that the air pressure in the safety valve increases. At the same time, the air pressure in the safety valve is measured by the pressure gauge 6.

[0044] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A constant pressure test bench for a safety valve, characterized in that: include: A frame (1), an air pump (5) is fixedly mounted on the inner wall of the frame (1), an output end of the air pump (5) is fixedly connected to an air guide tube (7), and the frame (1) is composed of a frame (11) and a pulley (12), and the pulley (12) is symmetrically mounted at the bottom of the frame (11); A fixing mechanism (2), the fixing mechanism (2) being fixedly mounted on the top of the frame (1), and an anti-deflection mechanism (4) being fixedly mounted on the top of the fixing mechanism (2); A pressurizing mechanism (3), the pressurizing mechanism (3) being used to seal the connection end of the safety valve and input the air pressure output by the air pump (5) into the interior of the safety valve, and the bottom end of the pressurizing mechanism (3) being fixedly connected to an air pressure gauge (6), and the pressurizing mechanism (3) being fixedly mounted on the top of the frame (1); The pressurizing mechanism (3) further comprises a connecting cover (301), the inner wall of the connecting cover (301) being fixedly connected to a threaded barrel (302), the outer surface of the threaded barrel (302) being threadedly connected to a threaded ring (306), the top of the threaded ring (306) being slidably connected to a curved plate (308), the curved plate (308) being symmetrically mounted on the top of the threaded ring (306), the curved plate (308) being an elastic plate, the top of the curved plate (308) being fixedly connected to a sealing ring (309), the inner wall of the threaded barrel (302) being fixedly connected to a fixed A cylinder (307), the inner wall of the fixed cylinder (307) is fixedly connected to a gas outlet cylinder (305), the outer surface of the gas outlet cylinder (305) is fixedly connected to a chute block (312), the chute block (312) is symmetrically arranged on the outer surface of the gas outlet cylinder (305), the outer surface of the chute block (312) is provided with a chute, a rubber ring (310) is slidably connected to the chute of the chute block (312), the top of the rubber ring (310) is fixedly connected to a spring block (311), and the spring block (311) is symmetrically installed on the top of the rubber ring (310); The fixing mechanism (2) comprises an electric disk (21), the outer surface of the electric disk (21) is symmetrically provided with clamping grooves, a bottom block (24) is slidably connected in the clamping groove of the electric disk (21), the electric disk (21) is electrically controlled internally so that the bottom block (24) slides in the clamping groove of the electric disk (21), and a clamping block (22) is fixedly connected to the top of the bottom block (24); The anti-deflection mechanism (4) comprises a fixing block (43), and the fixing block (43) is symmetrically mounted on the top of the electric disk (21), a connecting plate is provided on the top of the fixing block (43), and the top of the fixing block (43) is fixedly connected to a threaded plate (42) via the connecting plate.

2. The constant pressure test bench for a safety valve according to claim 1 is characterized in that: The inner wall of the connection cover (301) is fixedly connected with bolts (304), the bolts (304) are symmetrically installed on the inner wall of the connection cover (301), the connection cover (301) is symmetrically installed with the top of the frame (11) via the bolts (304), the bottom of the fixing cylinder (307) is fixedly connected with a connection valve (303), one end of the connection valve (303) is fixedly connected to an end of the air guide pipe (7) away from the air pump (5), and the other end of the connection valve (303) is fixedly connected to the input end of the pressure gauge (6).

3. The constant pressure test bench for a safety valve according to claim 1 is characterized in that: The outer surface of the clamping block (22) is fixedly connected to a protrusion (25), the outer surface of the clamping block (22) is provided with a sliding groove, and the outer surface of the clamping block (22) is symmetrically provided with a shaft sleeve, the top of the electric disk (21) is rotatably connected to a chuck (23), the outer surface of the chuck (23) is provided with a slot, and the slot of the chuck (23) is in contact with the outer surface of the protrusion (25).

4. The constant pressure test bench for a safety valve according to claim 3 is characterized in that: A slide plate (26) is slidably connected to the slide groove of the clamping block (22); a slide column (27) is fixedly connected to the outer surface of the slide plate (26); the slide column (27) slides on the outer surface of the slide plate (26); and the outer surface of the slide column (27) is slidably connected to the inner wall of the shaft sleeve of the clamping block (22).

5. The constant pressure test bench for a safety valve according to claim 4 is characterized in that: A spring (28) is fixedly connected to the shaft sleeve of the clamp block (22). The spring (28) is symmetrically arranged on the outer surface of the clamp block (22). One end of the spring (28) away from the shaft sleeve of the clamp block (22) is fixedly connected to the outer surface of the sliding column (27).

6. The constant pressure test bench for a safety valve according to claim 1, characterized in that: The outer surface of the threaded plate (42) is provided with threads, and a sliding groove is opened on the outer surface of the threaded plate (42). The outer surface of the threaded plate (42) is threadedly connected to the screw ring (41), and a sliding block (44) is slidably connected to the sliding groove of the threaded plate (42).

7. The constant pressure test bench for a safety valve according to claim 6, characterized in that: The inner wall of the slider (44) is rotatably connected to a rotating arm (49), an end of the rotating arm (49) away from the slider (44) is provided with a rotating shaft, the top of the slider (44) is in contact with the bottom of the screw ring (41), and the outer surface of the rotating arm (49) is fixedly connected to a rubber plate (48).

8. The constant pressure test bench for a safety valve according to claim 7, characterized in that: A rotating plate (47) is rotatably connected to the rotating shaft of the rotating arm (49); one end of the rotating plate (47) away from the rotating arm (49) is rotatably connected to a groove block (45); the groove block (45) is fixedly connected to the outer surface of the threaded plate (42); the outer surface of the rotating plate (47) is fixedly connected to one end of a rubber plate (48); and an elastic plate (46) is fixedly connected between the rotating plate (47) and the rotating arm (49).

Images