Flexible composite pipe annulus sealing performance detection device

Abstract

The utility model discloses a flexible composite pipe annulus sealing performance detection device which comprises a detection frame, a connecting seat, a magnetic powder spraying seat, an air pump and a vacuumizer, the magnetic powder spraying seat and the connecting seat are arranged in the detection frame in a front-back mode, and a flexible composite pipe annulus is arranged in the connecting seat in a clamping mode. The magnetic powder spraying seat is oppositely arranged at the joint of the flexible composite pipe annulus and the flexible composite pipe, a powder spraying gun is rotatably arranged on the magnetic powder spraying seat, a detection pipe opening is formed in the connecting seat and is in sealed communication with an exhaust port of the flexible composite pipe annulus, the air pump is communicated with a buffer tank, the buffer tank is provided with two sets of air outlets, and the air outlets are communicated with the air pump. The two groups of air outlets are respectively communicated with the detection pipe orifice in the connecting seat and the powder spraying gun on the magnetic powder spraying seat through pipelines, and the vacuumizer is communicated with the detection pipe orifice in the connecting seat through a pipeline. The device has the advantages that dual verification can be carried out on the annulus through a vacuum test and an inflation test, and the problem of failure of sealing performance under special conditions is solved.

Description

Technical Field

[0001] This utility model relates to the field of flexible composite pipe sealing performance testing technology, and in particular to a device for testing the annular sealing performance of flexible composite pipes. Background Technology

[0002] The relevant standards for the production of representative flexible composite pipes only require evaluation of internal airtightness. However, during production, issues such as joint crimping, inner and outer layer materials, joint sealing, and vent sealing can lead to water seepage into the annulus during use, increasing the risk of pipe bursting and failure.

[0003] Therefore, it is necessary to test whether the annular sealing performance of the flexible composite pipe meets the technical requirements during the manufacturing process before its use. Utility Model Content

[0004] The purpose of this invention is to provide a device for testing the sealing performance of a flexible composite pipe annulus, which can perform dual verification of the annulus through vacuum test and gas filling test, eliminating the problem of sealing performance failure under special circumstances.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A device for testing the sealing performance of a flexible composite tube annulus is characterized by comprising a testing frame, a connecting seat, a magnetic powder spraying seat, an air pump, and a vacuum pump. The magnetic powder spraying seat and the connecting seat are installed front and rear within the testing frame. A flexible composite tube annulus is clamped within the connecting seat. The magnetic powder spraying seat is positioned opposite to the connection between the flexible composite tube annulus and the flexible composite tube. A powder spraying gun is rotatably mounted on the magnetic powder spraying seat. A testing port is provided within the connecting seat, and the testing port is sealed and connected to the exhaust port of the flexible composite tube annulus. The air pump is connected to a buffer tank, which has two sets of air outlets. The two sets of air outlets are respectively connected to the testing port in the connecting seat and the powder spraying gun on the magnetic powder spraying seat via pipes. The vacuum pump is connected to the testing port in the connecting seat via a pipe.

[0007] Preferably, the connecting seat includes an upper movable seat and a lower fixed seat, both of which are arc-shaped structures arranged opposite each other. The lower fixed seat is connected to the testing frame by two sets of symmetrically arranged threaded rods. The two ends of the threaded rods are rotatably connected to the lower fixed seat and the testing frame respectively through bearing seats. A transmission gear is fixedly connected to the top outer wall of each set of threaded rods. A transmission motor is fixedly installed on the top of the testing frame. The output end of the transmission motor passes through the top of the testing frame and is connected to an output gear. The output gear meshes with the transmission gear for transmission. The middle part of the threaded rod is connected to both sides of the upper movable seat through threaded transmission.

[0008] Preferably, the upper movable seat and the lower fixed seat are each provided with an arc-shaped limiting protrusion on their respective inner sides.

[0009] Preferably, the detection port is disposed on the upper movable seat, a sealing gasket is fixedly installed at the bottom of the detection port, a limiting ring is disposed in the middle of the outer wall of the detection port, the upper movable seat is disposed in a movable groove corresponding to the limiting ring, the limiting ring moves up and down in the movable groove, a buffer spring is sleeved on the detection port in the movable groove, and the bottom of the buffer spring abuts against the upper part of the limiting ring.

[0010] Preferably, one set of air outlets of the buffer tank, the vacuum pump, and the detection port are connected by a T-joint, and a solenoid valve is installed on the connecting pipe of the T-joint to the buffer tank, the vacuum pump, and the detection port.

[0011] Preferably, a pressure sensor and a temperature sensor are also installed on the connecting pipe between the tee joint and the detection port.

[0012] Preferably, a timer and a controller are also provided on the top of the detection frame, and the controller is electrically connected to each solenoid valve and the drive motor.

[0013] Preferably, the magnetic powder spraying base has a ring structure and is installed in the detection frame through two sets of connecting rods. The powder spraying gun moves circumferentially on the magnetic powder spraying base along the connection between the flexible composite tube and the annular space of the flexible composite tube via a movable seat.

[0014] Preferably, a magnetic powder canister is installed above the powder spraying gun.

[0015] In summary, this utility model has the following beneficial effects:

[0016] This invention can directly verify the air tightness of the surrounding air, and if a leak is found, the leak point can be located directly, thereby improving the process.

[0017] This invention undergoes dual verification through annular vacuum testing and gas filling testing to eliminate the possibility of sealing performance failure under special circumstances.

[0018] This invention uses a three-way connector to eliminate the need for repeated insertion and removal of the vent hole in the two-step test, reducing the possibility of human operation affecting the vent hole seal, while controlling the variables of the two tests.

[0019] This invention, by adding a buffer tank, can make the inflation process uniform and stable, eliminating the impact of uneven inflation pressure caused by inflation equipment.

[0020] This invention, through a buffer tank connected to an air pump, can not only perform air filling tests but also magnetic powder spraying. The overall air tightness can also be judged by the subsequent blowing of the magnetic powder on the surface. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the structure at point A;

[0023] Figure 3 This is a side view of the overall structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the installation structure of the powder spraying gun on the magnetic powder spraying base of this utility model. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These embodiments do not constitute a limitation on this utility model.

[0026] like Figures 1 to 4 The device shown is a flexible composite tube annular sealing performance testing device, including a testing frame 1, a connecting seat, a magnetic powder spraying seat 2, an air pump 3, and a vacuum pump 4. The magnetic powder spraying seat 2 and the connecting seat are installed front and rear in the testing frame 1. The flexible composite tube annular is clamped in the connecting seat. The magnetic powder spraying seat 2 is positioned opposite to the connection between the flexible composite tube annular and the flexible composite tube. A powder spraying gun 5 is rotatably mounted on the magnetic powder spraying seat 2. A testing port 6 is provided in the connecting seat. The testing port 6 is sealed and connected to the exhaust port of the flexible composite tube annular. The air pump 3 is connected to a buffer tank 7. The buffer tank 7 is provided with two sets of air outlets. The two sets of air outlets are respectively connected to the testing port 6 in the connecting seat and the powder spraying gun 5 on the magnetic powder spraying seat 2 through pipes. The vacuum pump 4 is connected to the testing port 6 in the connecting seat through a pipe.

[0027] The connecting seat includes an upper movable seat 8 and a lower fixed seat 9. Both the upper movable seat 8 and the lower fixed seat 9 are arc-shaped structures arranged opposite each other. The lower fixed seat 9 and the testing frame 1 are connected by two sets of symmetrically arranged threaded rods 10. The two ends of the threaded rods 10 are rotatably connected to the lower fixed seat 9 and the testing frame 1 through bearing seats, respectively. A transmission gear 11 is fixedly connected to the top outer wall of each set of threaded rods 10. A transmission motor 12 is fixedly installed on the top of the testing frame 1. The output end of the transmission motor 12 passes through the top of the testing frame 1 and is connected to an output gear 13. The output gear 13 meshes with the transmission gear 11 for transmission. The middle part of the threaded rod 10 is connected to both sides of the upper movable seat 8 through threaded transmission.

[0028] Both the upper movable seat 8 and the lower fixed seat 9 have arc-shaped limiting protrusions 14 on their inner sides. The detection port 6 is located on the upper movable seat 8. A sealing gasket 15 is fixedly installed at the bottom of the detection port 6. A limiting ring 16 is provided in the middle of the outer wall of the detection port 6. The upper movable seat 8 is provided with a movable groove 17 corresponding to the limiting ring 16. The limiting ring 16 moves up and down in the movable groove 17. A buffer spring 18 is sleeved on the detection port 6 in the movable groove 17. The bottom of the buffer spring 18 abuts against the upper part of the limiting ring 16.

[0029] One set of air outlets of the buffer tank 7, the vacuum pump 4 and the detection port 6 are connected by a T-joint 20. Solenoid valves 19 are installed on the connecting pipes of the T-joint 20 to the buffer tank 7, the vacuum pump 4 and the detection port 6.

[0030] Pressure sensor 21 and temperature sensor 22 are also installed on the connecting pipe between the tee connector 20 and the detection port 6. The airtightness of the annulus can be determined by the pressure sensor 21 and temperature sensor 22.

[0031] The top of the test frame 1 is also equipped with a timer 23 and a controller 24. The controller 24 is electrically connected to each solenoid valve 19 and the drive motor 12. The controller 24 controls each solenoid valve 19, thereby facilitating the separate conduct of annular vacuum test and gas filling test.

[0032] The magnetic powder spraying base 2 has a ring structure and is installed in the detection frame 1 through two sets of connecting rods. The powder spraying gun 5 moves circumferentially on the magnetic powder spraying base 2 along the connection between the flexible composite tube and the annular space of the flexible composite tube via the movable seat 26.

[0033] A magnetic powder tank 25 is installed above the powder spray gun 5. The powder spray gun 5 uses gas in the buffer tank 7 to spray magnetic powder into the magnetic powder tube 25.

[0034] The working process of this utility model is as follows: First, the vacuum tightness is tested. The controller closes the solenoid valve at the buffer tank and turns on the vacuum pump. Then, the controller controls the opening of two sets of solenoid valves between the vacuum pump and the test port. The gas in the annulus is drawn away by the vacuum pump through the exhaust port. The pressure sensor is then remotely monitored. When the pressure reaches the preset pressure value, the two sets of solenoid valves and the vacuum pump are closed. The timer, temperature sensor, and pressure sensor start recording. After a specified time, the pressure rise and the temperature at that time are checked. Then, an inflation tightness test is performed. The air pump, buffer tank, and the solenoid valve between the buffer tank and the test port 6 are opened. The buffer tank is used to inflate the annulus. When the pressure reaches the preset pressure value, the two sets of solenoid valves and the buffer tank are closed. The timer, temperature sensor, and pressure sensor start recording. After a specified time, the pressure drop and the temperature at that time are checked. If there is a leak, the outer surface can be checked by airflow. The inner surface can be detected by depressurizing and the magnetic powder being blown by the airflow to change its state.

[0035] This invention can directly verify the air tightness of the surrounding air, and if a leak is found, the leak point can be located directly, thereby improving the process.

[0036] This invention undergoes dual verification through annular vacuum testing and gas filling testing to eliminate the possibility of sealing performance failure under special circumstances.

[0037] This invention uses a three-way connector to eliminate the need for repeated insertion and removal of the vent hole in the two-step test, reducing the possibility of human operation affecting the vent hole seal, while controlling the variables of the two tests.

[0038] This invention, by adding a buffer tank, can make the inflation process uniform and stable, eliminating the impact of uneven inflation pressure caused by inflation equipment.

[0039] This invention, through a buffer tank connected to an air pump, can not only perform air filling tests but also magnetic powder spraying. The overall air tightness can also be judged by the subsequent blowing of the magnetic powder on the surface.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Those skilled in the art can make various modifications or equivalent substitutions to the present utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present utility model's technical solution.

Claims

1. A device for testing the annular sealing performance of a flexible composite pipe, characterized in that, The device includes a testing frame, a connecting seat, a magnetic powder spraying base, an air pump, and a vacuum pump. The magnetic powder spraying base and the connecting seat are installed front and rear within the testing frame. A flexible composite tube annulus is clamped within the connecting seat. The magnetic powder spraying base is positioned opposite to the connection between the flexible composite tube annulus and the flexible composite tube. A powder spraying gun is rotatably mounted on the magnetic powder spraying base. A testing port is provided within the connecting seat, and the testing port is sealed and connected to the exhaust port of the flexible composite tube annulus. The air pump is connected to a buffer tank, which has two sets of air outlets. The two sets of air outlets are respectively connected to the testing port in the connecting seat and the powder spraying gun on the magnetic powder spraying base via pipes. The vacuum pump is connected to the testing port in the connecting seat via a pipe.

2. The flexible composite pipe annular sealing performance testing device according to claim 1, characterized in that: The connecting seat includes an upper movable seat and a lower fixed seat, both of which are arc-shaped structures arranged opposite each other. The lower fixed seat is connected to the testing frame by two sets of symmetrically arranged threaded rods. The two ends of the threaded rods are rotatably connected to the lower fixed seat and the testing frame respectively through bearing seats. A transmission gear is fixedly connected to the top outer wall of each set of threaded rods. A transmission motor is fixedly installed on the top of the testing frame. The output end of the transmission motor passes through the top of the testing frame and is connected to an output gear. The output gear meshes with the transmission gear for transmission. The middle part of the threaded rod is connected to both sides of the upper movable seat through threaded transmission.

3. The flexible composite pipe annular sealing performance testing device according to claim 2, characterized in that: Both the upper movable seat and the lower fixed seat have arc-shaped limiting protrusions on their respective inner sides.

4. The flexible composite pipe annular sealing performance testing device according to claim 3, characterized in that: The detection port is mounted on the upper movable seat. A sealing gasket is fixedly installed at the bottom of the detection port. A limiting ring is provided in the middle of the outer wall of the detection port. The upper movable seat is provided with a movable groove corresponding to the limiting ring. The limiting ring moves up and down in the movable groove. A buffer spring is sleeved on the detection port in the movable groove. The bottom of the buffer spring abuts against the upper part of the limiting ring.

5. The flexible composite pipe annular sealing performance testing device according to claim 2, characterized in that: One set of air outlets of the buffer tank, the vacuum pump and the detection port are connected by a T-joint. Solenoid valves are installed on the connecting pipes of the T-joint to the buffer tank, the vacuum pump and the detection port.

6. The flexible composite pipe annular sealing performance testing device according to claim 5, characterized in that: Pressure and temperature sensors are also installed on the connecting pipe between the tee joint and the detection port.

7. The flexible composite pipe annular sealing performance testing device according to claim 6, characterized in that: The top of the testing frame is also equipped with a timer and a controller, and the controller is electrically connected to each solenoid valve and the drive motor.

8. The flexible composite pipe annular sealing performance testing device according to claim 1, characterized in that: The magnetic powder spraying base has a ring structure and is installed in the detection frame through two sets of connecting rods. The powder spraying gun moves circumferentially on the magnetic powder spraying base through a movable seat along the connection between the flexible composite tube and the annular space.

9. The flexible composite pipe annular sealing performance testing device according to claim 8, characterized in that: A magnetic powder canister is installed above the powder spraying gun.

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