A pull-off valve flow test apparatus

Abstract

The application relates to the technical field of pull-off valve flow detection, and discloses a pull-off valve flow test equipment, which comprises a test water tank, a colorant mixing mechanism arranged on one side of the test water tank, a pulling force test mechanism arranged on the other side of the test water tank, a flow test mechanism arranged in the test water tank, observation windows symmetrically arranged on the inner walls of the two sides of the test water tank, and a liquid level meter arranged on the inner wall of one side of the test water tank. The pull-off valve flow test equipment keeps the water in the test water tank in a state of submerging the flow test mechanism, the colorant mixing mechanism dyes the water in the pull-off valve body, the pulling force test mechanism applies pulling force to the pull-off valve body, and the change of the flow loss of the pull-off valve body under different pulling force states can be more directly observed when the pull-off valve is pulled off; the observation windows can directly observe the color amount; the liquid level meter can measure the change of the liquid level of the added dyed liquid, and then the flow data can be measured and collected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pull-off valve flow detection, in particular to a pull-off valve flow test equipment. BACKGROUND

[0002] The pull-off valve belongs to one kind of emergency disengagement device, which can prevent accidents caused by accidental breakage of pipelines and wires, and is suitable for fields including hydrogenation machines, gas dispensers, charging piles and other fixed or mobile fluid storage devices.

[0003] In the prior art, such as the pull-off valve detection device and detection method with the authorized announcement number CN113432866B, the power mechanism drives the pull-off valve fixing mechanism to realize the up-down reciprocating motion of the pull-off valve through the power transmission mechanism, the bottom seat is fixedly connected with the guide disc assembly, the guide disc assembly includes the top plate with a plurality of grooves, the bottom plate fixedly connected with the bottom seat, and the connecting pipe for connecting the top plate and the bottom plate, one end of the traction assembly is connected to the pull-off valve, and the other end is matched with different positions of the grooves to form multi-directional tension detection of the pull-off valve; the pull-off valve falling protection assembly is arranged between the pull-off valve fixing mechanism and the pull-off valve, one end of the protection assembly is connected to the bottom of the pull-off valve, and the other end is connected to the pull-off valve fixing mechanism. The present application can meet the comprehensive pull-off test requirements of various tensions and multi-angle real working conditions, and the detection results are more comprehensive and accurate.

[0004] In the above-mentioned patent, although the comprehensive pull-off test requirements of various tensions and multi-angle real working conditions can be met, it is only suitable for tension test of the pull-off valve, and it is inconvenient to detect the flow loss in the protection process of the pull-off valve and to measure the flow loss of the pull-off valve under different pressure conditions, so a pull-off valve flow test equipment is needed. SUMMARY

[0005] The present application aims to provide a pull-off valve flow test equipment to solve the problem that the pull-off valve flow test equipment is only suitable for tension test of the pull-off valve, and it is inconvenient to detect the flow loss in the protection process of the pull-off valve and to measure the flow loss of the pull-off valve under different pressure conditions.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a pull-off valve flow test equipment, comprising:

[0007] A test water tank is provided on one side of the test water tank, and a tension test mechanism is provided on the other side of the test water tank.

[0008] The flow test mechanism is located inside the test water tank, and comprises a water guide pipe which is communicated with the colorant mixing mechanism, a stop valve is arranged on the water guide pipe, a pull-off valve body is arranged on one side of the water guide pipe, a closed water pipe is arranged on one side of the pull-off valve body, and the closed water pipe is clamped and fixed with the pull force test mechanism through the clamping assembly.

[0009] An observation window is symmetrically arranged on the inner wall of the test water tank.

[0010] A liquid level meter is arranged on the inner wall of one side of the test water tank.

[0011] As a preferred technical solution of the present application, the colorant mixing mechanism comprises a mixing water tank, a colorant inlet is arranged on one side of the top of the mixing water tank, a stirrer is arranged inside the mixing water tank, the top end of the stirrer is rotationally connected with the mixing water tank through the arrangement of a fixed top plate, a hand lever is arranged on the top of the fixed top plate, and a water inlet pipe is arranged on one side of the mixing water tank.

[0012] As a preferred technical solution of the present application, the clamping assembly comprises a fastening clasp ring, a connecting pipe plate in annular distribution is arranged on one side of the fastening clasp ring, a fastening clamping block is arranged on the bottom of one side of the connecting pipe plate, the clamping assembly further comprises a connecting sleeve ring, a linking pipe plate in annular distribution is arranged on the other side of the connecting sleeve ring, a fastening clasp is arranged on the bottom of the other side of the linking pipe plate, and uniform force side plates are symmetrically arranged on both sides of the connecting sleeve ring.

[0013] As a preferred technical solution of the present application, the pull force test mechanism comprises an electric cylinder, a piston rod arranged inside the electric cylinder extends into the inside of the test water tank, and one end of the piston rod is connected and fixed with the connecting sleeve ring through the arrangement of an anti-coming-off clamping block.

[0014] As a preferred technical solution of the present application, the pull force test mechanism further comprises a pull force steel rope, one end of the pull force steel rope is connected and fixed with the uniform force side plate through the arrangement of a fixed clamping block, and a limiting clamping hole matched with the pull force steel rope is symmetrically arranged on the other side of the test water tank.

[0015] As a preferred technical solution of the present application, one side of the test water tank is symmetrically provided with a fixed side plate, a winding roller is rotationally arranged on the inner wall of the two fixed side plates, a synchronous motor is arranged on one side of the fixed side plate, and the driving end of the synchronous motor is connected and fixed with one end of the winding roller through the arrangement of a shaft coupling.

[0016] As a preferred technical solution of the present application, the fastening clasp is matched with the fastening clamping block, and the connecting sleeve ring is rotationally clamped with the fastening clasp and the fastening clamping block.

[0017] As a preferred technical scheme of the present application, one side of the connecting pipe plate is provided with a connecting thread, the other side of the connecting pipe plate is also provided with a connecting thread, and the outer wall of the connecting pipe plate and the connecting pipe plate is threadedly connected with a fastening screw ring matched with the connecting thread.

[0018] As a preferred technical scheme of the present application, one side of the fastening screw ring is provided with a toothed clasp matched with the uniform force side plate, and the connecting pipe plate is provided with a limiting support matched with the fastening screw ring.

[0019] As a preferred technical scheme of the present application, one side of the test water tank is provided with a communicating water inlet pipe, and the other side of the test water tank is provided with a communicating drain valve.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1. The water inlet pipe is connected with the external water pipe through the flange to fill the test water tank with clean water, the water in the test water tank keeps the flow test mechanism submerged, the colorant mixing mechanism facilitates dyeing the water in the pull-off valve body, the tension test mechanism applies tension to the pull-off valve body, and the change of the flow of the pull-off valve body under different tension states can be more directly observed when the pull-off valve body is pulled off, the observation window can directly observe the amount of color, thereby feeling the change of the flow, the liquid level meter can measure the change of the liquid level of the dyed liquid, thereby the flow data can be measured and collected, and the dyed water is discharged through the drain valve after the test is completed.

[0022] 2. The pull-off valve flow test equipment, the connecting pipe plate is inserted into the gap of the connecting pipe plate and rotated, the fastening buckle is clamped and fixed with the fastening block, the connecting pipe plate and the connecting pipe plate are connected and limited, the fastening screw ring is tightened with the connecting thread by manually rotating the toothed clasp, the connecting pipe plate and the connecting pipe plate are fixed in one step, the uniform force side plate limits the toothed clasp to prevent the toothed clasp from coming out, and the fastening screw ring can be taken out from the other side of the uniform force side plate when disassembled.

[0023] 3. The pull-off valve flow test equipment, the piston rod passes through the round hole of the connecting sleeve ring and is fixed by the anti-coming-off block, thereby the pull-off valve body can be applied with pressure, the tension steel wire passes through the round hole of the uniform force side plate and is fixed by the fixed clamping block, the pull-off valve body and the tension test mechanism can be installed by the clamping assembly, the piston rod is retracted by the electric cylinder to apply pressure to the pull-off valve body, the synchronous motor drives the winding roller to rotate to wind the tension steel wire, pressure can be applied to the uniform force side plate, which helps the electric cylinder to apply tension, and the reaction state of the pull-off valve body under different tension states can be observed. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Fig. 2 is a schematic diagram of an overall structure of a pull-off valve flow test apparatus according to an embodiment of the present application;

[0025] Figure 2 Fig. 3 is a schematic diagram of a side view structure of a pull-off valve flow test apparatus according to an embodiment of the present application;

[0026] Figure 3 Fig. 4 is a schematic diagram of a bottom structure of a pull-off valve flow test apparatus according to an embodiment of the present application;

[0027] Figure 4 Fig. 5 is a schematic diagram of a test water tank structure of a pull-off valve flow test apparatus according to an embodiment of the present application;

[0028] Figure 5 Fig. 6 is a schematic diagram of a cross-sectional structure of a colorant mixing mechanism of a pull-off valve flow test apparatus according to an embodiment of the present application;

[0029] Figure 6 Fig. 7 is a schematic diagram of a flow test mechanism, a colorant mixing mechanism, and a pull test mechanism structure of a pull-off valve flow test apparatus according to an embodiment of the present application;

[0030] Figure 7 Fig. 8 is a schematic diagram of a side view structure of a flow test mechanism, a colorant mixing mechanism, and a pull test mechanism of a pull-off valve flow test apparatus according to an embodiment of the present application;

[0031] Figure 8 Fig. 9 is a schematic diagram of an exploded structure of a flow test mechanism of a pull-off valve flow test apparatus according to an embodiment of the present application;

[0032] Figure 9 Fig. 10 is a schematic diagram of an electric cylinder structure of a pull-off valve flow test apparatus according to an embodiment of the present application;

[0033] Figure 10 Fig. 11 is a schematic diagram of an exploded structure of a clamping assembly of a pull-off valve flow test apparatus according to an embodiment of the present application.

[0034] In the drawings:

[0035] 1, test tank; 2, flow test mechanism; 201, water guide pipe; 202, stop valve; 203, pull-off valve body; 204, closed water pipe; 25, clamping assembly; 251, fastening clasp; 252, connecting pipe plate; 253, fastening clamping block; 254, connecting sleeve ring; 255, connecting pipe plate; 256, fastening buckle; 257, connecting thread; 258, fastening screw ring; 259, toothed clasp; 260, limiting support block; 261, uniform force side plate; 3, colorant mixing mechanism; 301, mixing water tank; 302, colorant inlet; 303, stirrer; 304, fixed top plate; 305, hand lever; 306, clean water inlet pipe; 4, pull test mechanism; 401, electric cylinder; 402, piston rod; 403, anti-dropping clamping block; 404, pull steel rope; 405, fixed clamping block; 406, limiting clamping hole; 407, fixed side plate; 408, winding roller; 409, synchronous motor; 5, water inlet pipe; 6, drain valve; 7, observation window; 8, liquid level meter. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] Please refer to Figures 1-10 The present application provides a technical solution: a pull-off valve flow test device, comprising a test tank 1, a colorant mixing mechanism 3 is arranged on one side of the test tank 1, a pull test mechanism 4 is arranged on the other side of the test tank 1, a flow test mechanism 2 is located inside the test tank 1, observation windows 7 are symmetrically arranged on the inner walls of the two sides of the test tank 1, a liquid level meter 8 is arranged on the inner wall of one side of the test tank 1, a water inlet pipe 5 is arranged on the top of one side of the test tank 1, a drain valve 6 is arranged on the bottom of the other side of the test tank 1, the water inlet pipe 5 is connected to an external water pipe through a flange to fill the test tank 1 with clean water, the water in the test tank 1 keeps the flow test mechanism 2 submerged, the colorant mixing mechanism 3 facilitates dyeing the water inside the pull-off valve body 203, the pull test mechanism 4 applies a pulling force to the pull-off valve body 203, and the change in flow rate of the pull-off valve body 203 under different pulling forces can be more directly observed when the pull-off valve body 203 is pulled off, the observation windows 7 can directly observe the amount of color, thereby feeling the change in flow rate, the liquid level meter 8 can measure the change in the liquid level of the dyed liquid, thereby measuring and collecting flow rate data, and the dyed water is discharged through the drain valve 6 after the test is completed. It should be noted that the dyeing agent can be a dyeing agent that fades to colorless over time, which can realize the recycling of the water body and facilitate energy saving in testing.

[0038] The flow test mechanism 2 comprises a water guide pipe 201 which is communicated with the colorant mixing mechanism 3, the water guide pipe 201 is provided with a stop valve 202, one side of the water guide pipe 201 is provided with a pull-off valve body 203, one side of the pull-off valve body 203 is provided with a closed water pipe 204, the closed water pipe 204 is clamped and fixed with the pull test mechanism 4 through the clamping assembly 25, the water guide pipe 201 is convenient for guiding the dyeing water into the closed water pipe 204 and the pull-off valve body 203, the in-out of the dyeing water flow can be controlled through the stop valve 202, and the water amount can be controlled in time when the pull-off valve body 203 is damaged.

[0039] The clamping assembly 25 comprises a fastening clamping ring 251, one side of the fastening clamping ring 251 is provided with a ring-shaped distribution of a connecting pipe plate 252, one side of the bottom of the connecting pipe plate 252 is provided with a fastening clamping block 253, the clamping assembly 25 further comprises a connecting sleeve ring 254, the other side of the connecting sleeve ring 254 is provided with a ring-shaped distribution of a connecting pipe plate 255, the other side of the bottom of the connecting pipe plate 255 is provided with a fastening clamping buckle 256, both sides of the connecting sleeve ring 254 are symmetrically provided with a uniform force side plate 261, the fastening clamping ring 251 is slidably arranged outside the closed water pipe 204 through a clamping hole, the fastening clamping buckle 256 is matched with the fastening clamping block 253, the connecting sleeve ring 254 is rotationally clamped with the fastening clamping block 253 through the fastening clamping buckle 256, one end of the closed water pipe 204 is also provided with a clamping block, which can conveniently clamp and fix the fastening clamping ring 251, the width of the connecting pipe plate 255 is less than the gap between the connecting pipe plates 252, so that the connecting pipe plate 255 is inserted and rotated from the gap between the connecting pipe plates 252, the fastening clamping buckle 256 is clamped and fixed with the fastening clamping block 253, and the connecting pipe plate 252 and the connecting pipe plate 255 are connected and limited in position.

[0040] One side of the outer wall of the connecting pipe plate 252 is provided with a connecting thread 257, the other side of the outer wall of the connecting pipe plate 255 is also provided with a connecting thread 257, the outer wall of the connecting pipe plate 252 and the connecting pipe plate 255 is threadedly connected with a fastening screw ring 258 matched with the connecting thread 257, one side of the fastening screw ring 258 is provided with a toothed clamping ring 259 matched with the uniform force side plate 261, the connecting pipe plate 252 is provided with a limiting support 260 matched with the fastening screw ring 258, the connecting pipe plate 252 and the connecting pipe plate 255 are provided with the connecting thread 257 at the joint, the fastening screw ring 258 is screwed with the connecting thread 257 by manually rotating the toothed clamping ring 259, the limiting support 260 is convenient for limiting the fastening screw ring 258, and then the connecting pipe plate 252 and the connecting pipe plate 255 can be fixed in one step, the uniform force side plate 261 is convenient for limiting the toothed clamping ring 259, preventing the toothed clamping ring 259 from coming out, and the fastening screw ring 258 can be taken out from the other side of the uniform force side plate 261 when disassembled.

[0041] The colorant mixing mechanism 3 comprises a mixing water tank 301, a colorant inlet 302 is arranged on one side of the top of the mixing water tank 301, a stirrer 303 is arranged in the mixing water tank 301, the top end of the stirrer 303 is rotationally connected with the mixing water tank 301 through a fixed top plate 304, a hand lever 305 is arranged on the top of the fixed top plate 304, a clean water inlet pipe 306 is arranged on one side of the mixing water tank 301 in communication, the colorant inlet 302 guides the dyeing agent into the mixing water tank 301, the clean water inlet pipe 306 is connected with an external water pipe through a flange to guide clean water, the hand lever 305 is manually rotated to drive the stirrer 303 to rotate, so that the clean water and the dyeing agent are uniformly mixed, and the mixing effect can be directly observed through the colorant inlet 302.

[0042] The tension test mechanism 4 comprises an electric cylinder 401, a piston rod 402 arranged in the electric cylinder 401 extends into the inside of the test water tank 1, one end of the piston rod 402 is fixedly connected with the connecting sleeve ring 254 through a anti-coming-off block 403, the tension test mechanism 4 further comprises a tension steel wire 404, one end of the tension steel wire 404 is fixedly connected with the uniform force side plate 261 through a fixed block 405, and a limiting block hole 406 matched with the tension steel wire 404 is symmetrically arranged on the other side of the test water tank 1, a fixed side plate 407 is symmetrically arranged on one side of the test water tank 1, a winding roller 408 is rotationally arranged on the inner wall of the two fixed side plates 407, a synchronous motor 409 is arranged on one side of the fixed side plate 407, the driving end of the synchronous motor 409 is fixedly connected with one end of the winding roller 408 through a shaft coupling, the electric cylinder 401 is arranged outside the test water tank 1, the piston rod 402 passes through the circular hole of the connecting sleeve ring 254 and is fixed through the anti-coming-off block 403, so that the pressure can be applied to the pull-off valve body, the tension steel wire 404 passes through the circular hole of the uniform force side plate 261 and is fixed through the fixed block 405, so that the pull-off valve body and the tension test mechanism 4 can be quickly and detachably installed through the clamping assembly 25, the piston rod 402 is retracted through the electric cylinder 401 to apply pressure to the pull-off valve body, the winding roller 408 is driven by the synchronous motor 409 to wind the tension steel wire 404, so that the pressure can be applied to the uniform force side plate 261, the limiting block hole 406 is convenient for limiting the tension steel wire 404, so that the tension steel wire 404 can be kept in a tight and horizontal state, which is helpful for assisting the electric cylinder 401 to apply tension, and the reaction state and the flow loss state of the pull-off valve body under different tension states can be observed, so that the pull-off valve body can be tested.

[0043] It should be noted that a sealing washer is usually arranged between the electric cylinder 401 and the piston rod 402 to prevent water in the test water tank 1 from entering the inside of the electric cylinder 401, the tension steel wire 404 and the clamping assembly 25 are reinforced hard steel materials, and will not be deformed during the tension test, so that the connection stability is not affected.

[0044] Working principle: the water inlet pipe 5 is connected with the external water pipe through the flange to fill the test tank 1 with clean water, the water in the test tank 1 keeps the flow test mechanism 2 submerged, the colorant mixing mechanism 3 facilitates the dyeing of the water in the pull-off valve body 203, the pull test mechanism 4 applies a pulling force to the pull-off valve body 203, and the pull-off valve body 203 can be more directly observed under different pulling force conditions. The flow change of the pull-off valve body 203, the observation window 7 can directly observe the amount of color, and then feel the different flow changes, the liquid level meter 8 can measure the change of the liquid level of the added dyeing liquid, and then the flow data can be measured and collected. After the test is completed, the dyed water is discharged through the drain valve 6.

[0045] The connecting sleeve ring 254 is rotatably connected with the fastening clamping block 253 by the fastening buckle 256, one end of the closed water pipe 204 is also provided with a clamping block, the fastening clamping ring 251 can be conveniently clamped and fixed, the connecting pipe plate 255 is inserted into the gap of the connecting pipe plate 252 and rotated, the fastening buckle 256 is clamped and fixed with the fastening clamping block 253, the connecting pipe plate 252 and the connecting pipe plate 255 are conveniently connected and limited, the fastening screw ring 258 is tightened with the connecting screw thread 257 by manually rotating the toothed clamping ring 259, the limiting block 260 is convenient for limiting the fastening screw ring 258, and the connecting pipe plate 252 and the connecting pipe plate 255 can be fixed in one step, the uniform force side plate 261 is convenient for limiting the toothed clamping ring 259, and prevents the toothed clamping ring 259 from coming out, and the fastening screw ring 258 can be taken out from the other side of the uniform force side plate 261 when disassembled.

[0046] The colorant inlet 302 introduces the dyeing agent into the mixing water tank 301, the water inlet pipe 306 is connected with the external water pipe through the flange to introduce clean water, the hand lever 305 is manually rotated to drive the stirrer 303 to rotate, which facilitates uniform mixing of the clean water and the dyeing agent, the colorant inlet 302 can directly observe the mixing effect, the water guide pipe 201 is convenient for guiding the dyed water into the closed water pipe 204 and the pull-off valve body 203, and the water flow can be controlled by the stop valve 202. When the pull-off valve body 203 is damaged, the water flow can be controlled in time.

[0047] The piston rod 402 is fixed through the anti-coming-off block 403 by passing through the round hole of the connecting ring 254, so that the pressure can be applied to the pull-off valve body; the tension steel wire 404 is fixed through the fixing block 405 by passing through the round hole of the uniform force side plate 261, so that the pull-off valve body can be quickly and detachably installed with the tension test mechanism 4 through the clamping assembly 25; the piston rod 402 is retracted by the electric cylinder 401 to apply pressure to the pull-off valve body; the synchronous motor 409 drives the winding roller 408 to rotate to wind the tension steel wire 404, so that the pressure can be applied to the uniform force side plate 261; the limiting clamping hole 406 is convenient for limiting the tension steel wire 404, so that the tension steel wire 404 can be kept in a taut horizontal state, which is helpful for assisting the electric cylinder 401 to apply tension, and is convenient for observing the reaction state of the pull-off valve body and the flow loss state under different tension states, and is convenient for testing the pull-off valve body.

[0048] It should be finally pointed out that the above content is only used to illustrate the technical solutions of the present application, and is not a limitation on the protection scope of the present application. Simple modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A pull-off valve flow test apparatus, characterized by: The utility model relates to a test water tank (1) one side is provided with colorant mixing mechanism (3), and the other side of test water tank (1) is provided with tension test mechanism (4), and the utility model relates to a flow test mechanism (2) is located inside test water tank (1), and flow test mechanism (2) includes water guide pipe (201), and water guide pipe (201) is communicated with colorant mixing mechanism (3), and the water guide pipe (201) is provided with stop valve (202), and one side of water guide pipe (201) is provided with pull -off valve body (203), and one side of pull -off valve body (203) is provided with closed water pipe (204), and closed water pipe (204) is fixed with tension test mechanism (4) through setting up clamping assembly (25) and clamping. Observation window (7) symmetry is provided in the inner wall of both sides of test water tank (1). Liquid level meter (8) is provided in the inner wall of one side of test water tank (1). The colorant mixing mechanism (3) includes a mixing water tank (301), a colorant inlet (302) is arranged on one side of the top of the mixing water tank (301), a stirrer (303) is arranged in the mixing water tank (301), the top end of the stirrer (303) is rotatably connected with the mixing water tank (301) by arranging a fixed top plate (304), a hand lever (305) is arranged on the top of the fixed top plate (304), and a clean water inlet pipe (306) is arranged on one side of the mixing water tank (301). The clamping assembly (25) includes a fastening clasp (251), a connecting pipe plate (252) is arranged on one side of the fastening clasp (251) in a ring shape, a fastening clamping block (253) is arranged on the bottom of one side of the connecting pipe plate (252), the clamping assembly (25) further includes a connecting sleeve ring (254), an engaging pipe plate (255) is arranged on the other side of the connecting sleeve ring (254) in a ring shape, a fastening buckle (256) is arranged on the bottom of the other side of the engaging pipe plate (255), and uniform force side plates (261) are symmetrically arranged on both sides of the connecting sleeve ring (254).

2. A pull-off valve flow test apparatus according to claim 1, wherein: The tension test mechanism (4) includes an electric cylinder (401), a piston rod (402) arranged in the electric cylinder (401) extends into the test water tank (1), one end of the piston rod (402) is connected and fixed with the connecting sleeve ring (254) by arranging an anti-dropping clamping block (403).

3. A pull-off valve flow test apparatus as defined in claim 1, wherein: The tension test mechanism (4) further includes a tension steel rope (404), one end of the tension steel rope (404) is connected and fixed with the uniform force side plate (261) by arranging a fixed clamping block (405), and limit clamping holes (406) matched with the tension steel rope (404) are symmetrically arranged on the other side of the test water tank (1).

4. A pull-off valve flow test apparatus according to claim 3, wherein: ​ 5. A pull-off valve flow test apparatus according to claim 3, wherein: ​ 6. A pull-off valve flow test apparatus according to claim 5, wherein: The test tank (1) is symmetrically provided with fixed side plates (407) on one side, the inner walls of two fixed side plates (407) are rotationally provided with winding rollers (408), one side of the fixed side plate (407) is provided with a synchronous motor (409), the driving end of the synchronous motor (409) is fixedly connected with one end of the winding roller (408) through the setting of the shaft coupling, and the other end of the tension steel wire (404) is wound on the winding roller (408).

7. A pull-off valve flow test apparatus as defined in claim 3, wherein: The fastening buckle (256) is matched with the fastening block (253), and the connecting sleeve ring (254) is rotationally clamped by the setting of the fastening buckle (256) and the fastening block (253).

8. A pull-off valve flow test apparatus as defined in claim 3, wherein: The outer wall of one side of the connecting pipe plate (252) is provided with a connecting thread (257), and the outer wall of the other side of the connecting pipe plate (255) is also provided with a connecting thread (257). The outer wall of the connecting pipe plate (252) and the connecting pipe plate (255) are threadedly connected with the fastening screw ring (258) matched with the connecting thread (257).

9. A pull-off valve flow test apparatus according to claim 8, wherein: The outer wall of one side of the connecting pipe plate (252) is provided with a connecting thread (257), and the outer wall of the other side of the connecting pipe plate (255) is also provided with a connecting thread (257). The outer wall of the connecting pipe plate (252) and the connecting pipe plate (255) are threadedly connected with the fastening screw ring (258) matched with the connecting thread (257).

10. A pull-off valve flow test apparatus as defined in claim 1, wherein: The outer wall of one side of the connecting pipe plate (252) is provided with a connecting thread (257), and the outer wall of the other side of the connecting pipe plate (255) is also provided with a connecting thread (257). The outer wall of the connecting pipe plate (252) and the connecting pipe plate (255) are threadedly connected with the fastening screw ring (258) matched with the connecting thread (257). The outer wall of one side of the connecting pipe plate (252) is provided with a connecting thread (257), and the outer wall of the other side of the connecting pipe plate (255) is also provided with a connecting thread (257). The outer wall of the connecting pipe plate (252) and the connecting pipe plate (255) are threadedly connected with the fastening screw ring (258) matched with the connecting thread (257). The outer wall of one side of the connecting pipe plate (252) is provided with a connecting thread (257), and the outer wall of the other side of the connecting pipe plate (255) is also provided with a connecting thread (257). The outer wall of the connecting pipe plate (252) and the connecting pipe plate (255) are threadedly connected with the fastening screw ring (258) matched with the connecting thread (257). The outer wall of one side of the connecting pipe plate (252) is provided with a connecting thread (257), and the outer wall of the other side of the connecting pipe plate (255) is also provided with a connecting thread (257). The outer wall of the connecting pipe plate (252) and the connecting pipe plate (255) are threadedly connected with the fastening screw ring (258) matched with the connecting thread (257). The outer wall of one side of the connecting pipe plate (252) is provided with a connecting thread (257), and the outer wall of the other side of the connecting pipe plate (255) is also provided with a connecting thread (257).

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