Hydraulic pipe sealing performance testing device

Abstract

The utility model relates to the technical field of hydraulic pipe testing, in particular to a hydraulic pipe sealing performance testing device which comprises a bottom plate, a fixed first fixing frame and a movable second fixing frame are installed on the bottom plate, a hydraulic pipe fitting is installed between the first fixing frame and the second fixing frame, and plugs are installed at the two ends of the hydraulic pipe fitting. A sliding rail and a hydraulic rod are arranged at the position, corresponding to the second fixing frame, of the bottom plate. The hydraulic rod is used for driving the second fixing frame to stretch the hydraulic pipe fitting. A motor and an oil pump are installed on the bottom plate, the motor is used for driving the oil pump and injecting oil into the hydraulic pipe fitting through an oil conveying pipe, and a pressure gauge is arranged on the oil conveying pipe and used for testing the sealing performance change of the hydraulic pipe fitting in the stretching process. The hydraulic pipeline air tightness detection device has the advantages of accurate detection and high efficiency, and solves the problems that the existing air tightness detection does not conform to the actual use environment of the hydraulic pipeline, the detection is not accurate enough, and the detection efficiency is low when the mechanical property detection is performed after the air tightness detection is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pipe testing, in particular to a hydraulic pipe sealing testing device. Background Art

[0002] After the hydraulic pipes are produced, in order to ensure their factory pass rate, all hydraulic pipes are generally subjected to multiple tests, including air tightness tests. At present, the hydraulic pipe air tightness test instruments in the existing technology have relatively single functions, and other performance checks are not involved in the hydraulic pipe testing process. When hydraulic pipes are used, they are subject to forces, so they need to undergo mechanical property tests. When hydraulic pipes are subjected to external forces, they may deform and even lose their sealing properties. Therefore, ordinary air tightness tests do not meet the actual use environment of hydraulic pipes, and the tests are not accurate enough. The efficiency of mechanical property tests after air tightness tests is low. To this end, we propose a hydraulic pipe sealing test device. Utility Model Content

[0003] The utility model aims to provide a hydraulic pipe sealing test device, which has the advantages of accurate detection and high efficiency, and solves the problems that the existing air tightness detection does not conform to the actual use environment of the hydraulic pipeline, the detection is not accurate enough, and the detection efficiency of mechanical properties detection after the air tightness detection is low.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic pipe sealing test device, comprising a bottom plate, a fixed first fixing frame and a movable second fixing frame are installed on the bottom plate, a hydraulic pipe fitting is installed between the first fixing frame and the second fixing frame, and plugs are installed at both ends of the hydraulic pipe fitting, a slide rail and a hydraulic rod are arranged at a position on the bottom plate corresponding to the second fixing frame, and the hydraulic rod is used to drive the second fixing frame to stretch the hydraulic pipe fitting;

[0005] A motor and an oil pump are installed on the bottom plate. The motor is used to drive the oil pump and inject oil into the hydraulic pipe through the oil pipe. A pressure gauge is provided on the oil pipe. The pressure gauge is used to test the sealing changes of the hydraulic pipe during the stretching process.

[0006] Preferably, an oil tank is also provided on the base plate, and the oil pump is connected to the oil tank through an oil inlet pipe.

[0007] Preferably, a controller is provided on the oil tank, and the controller is used to control the operation of the motor and the hydraulic rod.

[0008] Preferably, a displacement sensor is provided between the first fixing frame and the second fixing frame, and the displacement sensor is used to detect the linear deformation of the hydraulic pipe under the action of tension.

[0009] Preferably, a tension sensor is provided between the hydraulic rod and the second fixing frame, and the tension sensor is used to detect the tension exerted by the hydraulic rod on the second fixing frame and the hydraulic pipe fitting.

[0010] Preferably, a plurality of groups of motors and oil pumps are arranged on the bottom plate, each group of motors and oil pumps corresponds to a hydraulic pipe fitting, and the hydraulic rod is used to simultaneously drive the plurality of hydraulic pipe fittings to stretch and test the sealing properties.

[0011] Preferably, the first fixing frame and the second fixing frame both include a cushion block and a pressure block, the cushion block is provided with a limiting groove, the pressure block is provided with a limiting plate, the limiting plate is connected to the screw rod through a connecting sleeve, the screw rod is fixedly connected with a knob, and the knob is used to drive the screw rod to rotate and press the limiting plate and the hydraulic pipe fitting at the bottom thereof.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model can stretch the hydraulic pipe fittings that are undergoing air tightness testing by setting a fixed frame and a hydraulic rod, thereby simulating whether the hydraulic pipe fittings meet the air tightness requirements during actual use. At the same time, multiple sets of motors and oil pumps are set up to simultaneously test the air tightness of multiple hydraulic pipe fittings, and stretch multiple hydraulic pipe fittings through the same hydraulic rod. This improves the inspection efficiency of hydraulic pipe fittings. It solves the problems that the existing air tightness inspection does not conform to the actual use environment of hydraulic pipelines, the inspection is not accurate enough, and the inspection efficiency of mechanical properties inspection after the air tightness inspection is low.

[0014] 2. The utility model is provided with a displacement sensor and a tension sensor. The displacement sensor detects the deformation of the hydraulic pipe fittings, and the tension sensor detects the tension exerted on the hydraulic pipe fittings. By setting the standard deformation amount of a specific tension value, the mechanical performance test of the hydraulic pipe fittings can be performed while performing the air tightness test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the first fixing frame of the utility model.

[0017] In the figure: 1. base plate; 2. first fixing frame; 3. second fixing frame; 4. hydraulic pipe fittings; 5. slide rails; 6. hydraulic rods; 7. motors; 8. oil pumps; 9. pressure gauges; 10. plugs; 11. oil inlet pipes; 12. oil tanks; 13. controllers; 14. displacement sensors; 15. tension sensors; 16. cushion blocks; 17. pressure blocks; 18. limit grooves; 19. limit plates; 20. connecting sleeves; 21. screw rods; 22. knobs. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1 As shown, a hydraulic pipe sealing test device includes a base plate 1, on which a fixed first fixing frame 2 and a movable second fixing frame 3 are installed, a hydraulic pipe fitting 4 is installed between the first fixing frame 2 and the second fixing frame 3, and plugs 10 are installed at both ends of the hydraulic pipe fitting 4. In order to ensure the sealing of both ends of the hydraulic pipe fitting 4, a slide rail 5 and a hydraulic rod 6 are arranged on the base plate 1 at a position corresponding to the second fixing frame 3, and the hydraulic rod 6 is used to drive the second fixing frame 3 to stretch the hydraulic pipe fitting 4; when the hydraulic rod 6 is running, the second fixing frame 3 slides along the slide rail 5. By setting the fixing frame and the hydraulic rod 6, the hydraulic pipe fitting 4 undergoing an airtightness test can be stretched, thereby simulating whether the hydraulic pipe fitting 4 meets the airtightness requirements during actual use.

[0020] A motor 7 and an oil pump 8 are installed on the base plate 1. The motor 7 is used to drive the oil pump 8 and inject oil into the hydraulic pipe 4 through the oil pipe. A pressure gauge 9 is provided on the oil pipe. The pressure gauge 9 is used to test the change of the sealing performance of the hydraulic pipe 4 during the stretching process. Several groups of motors 7 and oil pumps 8 are provided on the base plate 1. Each group of motors 7 and oil pumps 8 corresponds to a hydraulic pipe 4. The hydraulic rod 6 is used to drive several hydraulic pipes (4) to stretch and test the sealing performance at the same time. Since multiple groups of motors 7 and oil pumps 8 are provided, multiple hydraulic pipes 4 can be tested for air tightness at the same time, and the stretching of multiple hydraulic pipes 4 can be achieved through the same hydraulic rod 6. This improves the detection efficiency of the hydraulic pipe 4. It solves the problem that the existing air tightness detection does not conform to the actual use environment of the hydraulic pipeline, the detection is not accurate enough, and the detection efficiency of the mechanical performance detection after the air tightness detection is low.

[0021] An oil tank 12 is also provided on the bottom plate 1, and the oil pump 8 is connected to the oil tank 12 through the oil inlet pipe 11. The oil tank 12 can directly provide oil to a plurality of oil pumps 8, so as to facilitate the air tightness test of the hydraulic pipe fitting 4.

[0022] A displacement sensor 14 is provided between the first fixing frame 2 and the second fixing frame 3. The displacement sensor 14 is used to detect the linear deformation of the hydraulic pipe fitting 4 under the action of tension. A tension sensor 15 is provided between the hydraulic rod 6 and the second fixing frame 3. The tension sensor 15 is used to detect the tension of the hydraulic rod 6 on the second fixing frame 3 and the hydraulic pipe fitting 4. A controller 13 is provided on the oil tank 12. The controller 13 is used to control the operation of the motor 7 and the hydraulic rod 6. The controller 13 adopts a PLC controller 13 with a display screen to control various electrical appliances and is connected to an external power supply. The display screen is used to display the tension change and displacement change of the hydraulic pipe fitting 4. By providing the displacement sensor 14 and the tension sensor 15, the displacement sensor 14 detects the deformation of the hydraulic pipe fitting 4, and the tension sensor 15 detects the tension of the hydraulic pipe fitting 4. By setting the standard deformation of a specific tension value, the mechanical property test of the hydraulic pipe fitting 4 can be carried out while performing the air tightness test.

[0023] like Figure 2 As shown, the first fixing frame 2 and the second fixing frame 3 both include a cushion block 16 and a pressing block 17. A limiting groove 18 is provided on the cushion block 16, and a limiting plate 19 is provided on the pressing block 17. The limiting plate 19 is connected to the screw rod 21 through a connecting sleeve 20. A knob 22 is fixedly connected to the screw rod 21. The knob 22 is used to drive the screw rod 21 to rotate and press the limiting plate 19 and the hydraulic pipe fitting 4 at the bottom thereof. The cushion block 16 and the pressing block 17 are provided to facilitate the fixing of the hydraulic pipe fitting 4 to be tested, thereby ensuring that the hydraulic pipe fitting 4 can be stretched while performing the air tightness test. The setting of the limiting groove 18 is convenient for placing the hydraulic pipe fitting 4, and the limiting plate 19 is pressed and fixed. The connecting sleeve 20 is sleeved on the end of the screw rod 21, and the two are movably connected, so that the limiting plate 19 can move up and down with the screw rod 21, but does not rotate with the screw rod 21. The setting of the knob 22 is convenient for manual operation, without the aid of tools, and the knob 22 can also be set as a nut to facilitate wrench operation.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic pipe sealing test device, comprising a base plate (1), characterized in that: A fixed first fixing frame (2) and a movable second fixing frame (3) are installed on the bottom plate (1); a hydraulic pipe fitting (4) is installed between the first fixing frame (2) and the second fixing frame (3); plugs (10) are installed at both ends of the hydraulic pipe fitting (4); a slide rail (5) and a hydraulic rod (6) are arranged at a position corresponding to the second fixing frame (3) on the bottom plate (1); the hydraulic rod (6) is used to drive the second fixing frame (3) to stretch the hydraulic pipe fitting (4); A motor (7) and an oil pump (8) are mounted on the base plate (1); the motor (7) is used to drive the oil pump (8) and inject oil into the hydraulic pipe (4) through the oil pipe; a pressure gauge (9) is provided on the oil pipe; the pressure gauge (9) is used to test changes in the sealing properties of the hydraulic pipe (4) during the stretching process.

2. A hydraulic pipe sealing test device according to claim 1, characterized in that: An oil tank (12) is also provided on the base plate (1), and the oil pump (8) is connected to the oil tank (12) via an oil inlet pipe (11).

3. A hydraulic pipe sealing test device according to claim 2, characterized in that: The oil tank (12) is provided with a controller (13), and the controller (13) is used to control the operation of the motor (7) and the hydraulic rod (6).

4. A hydraulic pipe sealing test device according to claim 1, characterized in that: A displacement sensor (14) is provided between the first fixing frame (2) and the second fixing frame (3), and the displacement sensor (14) is used to detect the linear deformation of the hydraulic pipe (4) under the action of tension.

5. A hydraulic pipe sealing test device according to claim 1, characterized in that: A tension sensor (15) is provided between the hydraulic rod (6) and the second fixing frame (3), and the tension sensor (15) is used to detect the magnitude of the tension exerted by the hydraulic rod (6) on the second fixing frame (3) and the hydraulic pipe fitting (4).

6. A hydraulic pipe sealing test device according to claim 1, characterized in that: A plurality of groups of motors (7) and oil pumps (8) are arranged on the base plate (1), each group of motors (7) and oil pumps (8) corresponds to a hydraulic pipe fitting (4), and the hydraulic rod (6) is used to simultaneously drive the plurality of hydraulic pipe fittings (4) to stretch and test the sealing properties.

7. A hydraulic pipe sealing test device according to claim 1, characterized in that: The first fixing frame (2) and the second fixing frame (3) both comprise a cushion block (16) and a pressure block (17); a limiting groove (18) is provided on the cushion block (16); a limiting plate (19) is provided on the pressure block (17); the limiting plate (19) is connected to a screw rod (21) via a connecting sleeve (20); a knob (22) is fixedly connected to the screw rod (21); the knob (22) is used to drive the screw rod (21) to rotate and press the limiting plate (19) and the hydraulic pipe fitting (4) at the bottom thereof.

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