Air check test device

Abstract

The utility model discloses a closed air test device which comprises a hub, an air bag is sleeved on the hub, the air bag is connected with the hub in a bonding mode, an original pipeline air inlet pipeline is arranged at the left end of the air bag and penetrates through the hub, an air bag air inlet pipeline is arranged on the hub, and the air bag air inlet pipeline penetrates through the hub. The air bag is arranged in the original pipeline, air is injected into the air bag through the air bag air inlet pipeline by the air compressor, the air bag is tightly attached to the original pipeline, and air pressure is controlled by the aid of the pressure gauge. Then the original pipeline is inflated through the air inlet pipeline of the original pipeline by the air compressor, the inflation amount is observed through the pressure gauge, and after the target pressure is reached, the valve on the air inlet pipeline of the original pipeline is closed, and the air check test is started, so that the device can be used in the air check test of hard pipelines such as ultraviolet curing pipelines and PE pipelines; and thus, the application range of the air check test device is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline airtightness test, in particular to an airtightness test device. Background Technique

[0002] After the municipal pipeline is repaired, it is usually necessary to detect the sealing performance of the pipeline and use this as the basis for acceptance. The sealing test usually adopts the water closure test or the airtightness test. The water closure test consumes a large amount of water and also requires water transfer. Therefore, the airtightness test is mainly used for the sealing test after the pipeline is repaired.

[0003] For flexible composite lining pipelines, they can be sealed by installing joints, blind plates or clamps. However, there is a lack of airtightness test devices for rigid pipelines such as ultraviolet light-cured pipelines and PE pipelines. For this reason, we propose an airtightness test device to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide an airtightness test device to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an airtightness test device, including a hub, an airbag is sleeved on the hub, the airbag is connected to the hub by bonding, a raw pipeline air inlet pipeline is arranged at the left end of the airbag, and the raw pipeline air inlet pipeline penetrates through the hub. An airbag air inlet pipeline is arranged on the hub, and the airbag air inlet pipeline penetrates through the hub and is communicated with the airbag. Reinforcing ribs are arranged on the outer wall of the hub. A pressure gauge is arranged on the raw pipeline air inlet pipeline. A raw pipeline is arranged on the right side of the airbag, and the hub is placed inside the raw pipeline.

[0006] As a further preference of this technical solution, a movable bin is arranged on the surface of the reinforcing rib on the left side of the hub. A bidirectional lead screw is rotated in the movable bin. A hand wheel is arranged at the top of the bidirectional lead screw. Two groups of transmission blocks are threadedly connected to the bidirectional lead screw. Connecting rods are arranged at the front ends of the transmission blocks, and rollers are arranged at the tops of the connecting rods.

[0007] As a further preference of this technical solution, valves are arranged on both the raw pipeline air inlet pipeline and the airbag air inlet pipeline, and a pressure gauge can also be arranged on the airbag air inlet pipeline.

[0008] As a further preference of this technical solution, two groups of reinforcing ribs are arranged, and the two groups of reinforcing ribs are symmetrically arranged on the outer walls on both sides of the hub respectively.

[0009] As a further preference of this technical solution, the top end of the hand wheel is designed to be cylindrical, and anti-slip lines are arranged on the surface of the hand wheel.

[0010] As a further preference of this technical solution, the transmission block is designed in a cross shape, and a through hole adapted to the transmission block is provided in the movable bin.

[0011] As a further preference of this technical solution, the roller is made of metal and is a one-way pulley.

[0012] The utility model provides a closed-air test device, which has the following beneficial effects:

[0013] 1. In the utility model, the airbag is placed into the original pipeline, and then air is injected into the airbag through the air compressor via the airbag inlet pipeline, so that the airbag is closely attached to the original pipeline. The air pressure is controlled by means of a pressure gauge, and then the original pipeline is inflated by the air compressor via the original pipeline inlet pipeline. The inflation volume is observed through the pressure gauge. After reaching the target pressure, the valve on the original pipeline inlet pipeline is closed, and the closed-air test is started, enabling this device to be used in the closed-air tests of hard pipelines such as ultraviolet-cured pipelines and PE pipelines, thereby improving the application range of the closed-air test device.

[0014] 2. In the utility model, the handwheel drives the bidirectional lead screw to rotate, and the rotating bidirectional lead screw acts on two transmission blocks, enabling the two transmission blocks to move on the bidirectional lead screw. The roller is driven to move through the connecting rod, so that the roller moves to fit the inner wall of the original pipeline, thereby driving the hub to slide into the original pipeline, preventing the hub from causing frictional damage to the inner wall of the original pipeline when the hub is placed into the original pipeline, and at the same time enabling the hub to be used in original pipelines of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 is a part drawing of the utility model;

[0017] Figure 3 is a three-dimensional sectional structural schematic diagram of the utility model;

[0018] Figure 4 is of the utility model Figure 3 A magnified structural schematic diagram at position A.

[0019] In the figure: 1, hub; 2, airbag; 3, original pipeline inlet pipeline; 4, airbag inlet pipeline; 5, reinforcing rib; 6, pressure gauge; 7, original pipeline; 8, movable bin; 9, bidirectional lead screw; 10, handwheel; 11, transmission block; 12, connecting rod; 13, roller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0021] The present utility model provides a technical solution: As Figures 1 to 4 shown, in this embodiment, a closed-air test device includes a hub 1, an airbag 2 is sleeved on the hub 1, the airbag 2 is connected to the hub 1 by adhesion, a raw pipeline air inlet pipeline 3 is provided at the left end of the airbag 2, and the raw pipeline air inlet pipeline 3 penetrates through the hub 1. An airbag air inlet pipeline 4 is provided on the hub 1, and the airbag air inlet pipeline 4 penetrates through the hub 1 and is communicated with the airbag 2. Reinforcing ribs 5 are provided on the outer wall of the hub 1. A pressure gauge 6 is provided on the raw pipeline air inlet pipeline 3. A raw pipeline 7 is provided on the right side of the airbag 2, and the hub 1 is placed inside the raw pipeline 7.

[0022] By placing the airbag 2 into the raw pipeline 7, and then injecting air into the airbag 2 through the airbag air inlet pipeline 4 by an air compressor, the airbag 2 is closely attached to the raw pipeline. The air pressure is controlled by means of the pressure gauge 6. Then, the raw pipeline 7 is inflated by the air compressor through the raw pipeline air inlet pipeline 3. The inflation volume is observed through the pressure gauge 6. After reaching the target pressure, the valve on the raw pipeline air inlet pipeline 3 is closed, and the closed-air test is started, so that this device can be used in the closed-air test of hard pipelines such as ultraviolet-cured pipelines and PE pipelines, thereby improving the application range of the closed-air test device.

[0023] In other embodiments, a movable bin 8 is provided on the surface of the reinforcing rib 5 on the left side of the hub 1. A bidirectional lead screw 9 is rotatably arranged in the movable bin 8. A hand wheel 10 is provided at the top of the bidirectional lead screw 9. Two groups of transmission blocks 11 are threadedly connected to the bidirectional lead screw 9. Connecting rods 12 are provided at the front ends of the transmission blocks 11, and rollers 13 are provided at the tops of the connecting rods 12;

[0024] By driving the bidirectional lead screw 9 to rotate through the hand wheel 10, and making the rotating bidirectional lead screw 9 act on the two groups of transmission blocks 11, the two groups of transmission blocks 11 move on the bidirectional lead screw 9, and the rollers 13 are driven to move through the connecting rods 12, so that the rollers 13 move to fit the inner wall of the raw pipeline 7, thereby driving the hub 1 to slide into the raw pipeline 7, preventing the situation that the hub 1 causes frictional damage to the inner wall of the raw pipeline 7 when the hub 1 is placed into the raw pipeline 7, and at the same time, the hub 1 can be placed into raw pipelines 7 of different sizes for use.

[0025] In other embodiments, valves are provided on both the raw pipeline air inlet pipeline 3 and the airbag air inlet pipeline 4, and a pressure gauge 6 can also be provided on the airbag air inlet pipeline 4;

[0026] Through this design, it is convenient for the staff to control the gas flow in the original pipeline intake pipe 3 and the airbag intake pipe 4, and prevent gas backflow. At the same time, it is also convenient for the staff to monitor the gas pressure in the original pipeline intake pipe 3 and the airbag intake pipe 4, and ensure that the gas pressure is within a safe range.

[0027] In other embodiments, there are two groups of reinforcing ribs 5, and the two groups of reinforcing ribs 5 are symmetrically arranged on the outer walls on both sides of the hub 1 respectively;

[0028] Through this design, the overall rigidity and strength of the hub 1 can be improved, thereby improving the service life of the hub 1.

[0029] In other embodiments, the top of the handwheel 10 is designed in a cylindrical shape, and the surface of the handwheel 10 is provided with anti-slip patterns;

[0030] Through this design, it is convenient for the staff to drive the bidirectional lead screw 9 to rotate in the movable bin 8 through the handwheel 10, and at the same time increase the friction between the staff's hand and the handwheel 10, so that when the staff operates the handwheel 10, it is not easy to slip.

[0031] In other embodiments, the transmission block 11 is designed in a cross shape, and a through hole adapted to the transmission block 11 is opened in the movable bin 8;

[0032] Through this design, the movable bin 8 can achieve the purpose of limiting the rotation of the transmission block 11, so that the transmission block 11 moves linearly up and down in the movable bin 8 under the action of the bidirectional lead screw 9, thereby ensuring the stability of the up and down movement of the transmission block 11.

[0033] In other embodiments, the roller 13 is made of metal, and the roller 13 is a one-way pulley;

[0034] Through this design, the high strength, wear resistance, corrosion resistance and other characteristics of the roller 13 can be improved, making it more durable, capable of withstanding greater pressure and weight, thereby extending the service life of the roller 13. At the same time, it ensures that it has good guiding performance, can slide stably in a specific direction, is not easy to deviate from the direction, and improves the accuracy and reliability of use.

[0035] The present utility model provides a closed gas test device, and the specific working principle is as follows:

[0036] After the original pipeline 7 is repaired, an airtightness test shall be carried out to judge the repair degree of the pipeline. After the repair of the original pipeline 7 is completed, clean the pipe orifice of the original pipeline 7. According to the pipe diameter, select a suitable hub 1 and lower it into the inspection well, and then push it into the original pipeline 7. Connect the air inlet pipeline 4 of the airbag to the air compressor, inflate the airbag 2 to make the airbag 2 fit tightly with the original pipeline 7, and with the help of the pressure gauge 6, close the valve after the inflation pressure reaches the pre-calculated value. Connect the air compressor to the original pipeline air inlet pipeline 3 to inflate the original pipeline 7. Observe the inflation volume through the pressure gauge. After reaching the target pressure, close the valve of the air inlet pipeline and start the airtightness test. After the airtightness test is completed, first open the valve of the original pipeline air inlet pipeline 3 to release the air. After the air release is completed, then open the valve of the air inlet pipeline 4 of the airbag to release the air from the airbag 2. After the air release is completed, recover the hub 1.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed-air test device, comprising a wheel hub (1), characterized in that: An airbag (2) is sleeved on the hub (1). The airbag (2) is connected to the hub (1) by adhesion. A raw pipeline intake pipe (3) is provided at the left end of the airbag (2), and the raw pipeline intake pipe (3) penetrates through the hub (1). An airbag intake pipe (4) is provided on the hub (1). The airbag intake pipe (4) penetrates through the hub (1) and is communicated with the airbag (2). Reinforcing ribs (5) are provided on the outer wall of the hub (1). A pressure gauge (6) is provided on the raw pipeline intake pipe (3). A raw pipeline (7) is provided on the right side of the airbag (2). The hub (1) is placed inside the raw pipeline (7).

2. The airtightness test device according to claim 1, characterized in that: A movable bin (8) is provided on the surface of the reinforcing rib (5) on the left side of the hub (1). A bidirectional lead screw (9) rotates inside the movable bin (8). A handwheel (10) is provided at the top of the bidirectional lead screw (9). Two groups of transmission blocks (11) are threadedly connected to the bidirectional lead screw (9). Connecting rods (12) are provided at the front ends of the transmission blocks (11). Roller wheels (13) are provided at the tops of the connecting rods (12).

3. The airtight test device according to claim 1, characterized in that: Valves are provided on both the raw pipeline intake pipe (3) and the airbag intake pipe (4). A pressure gauge (6) can also be provided on the airbag intake pipe (4).

4. The airtight test device according to claim 1, characterized in that: Two groups of reinforcing ribs (5) are provided. The two groups of reinforcing ribs (5) are symmetrically provided on the outer walls on both sides of the hub (1).

5. The airtightness test device according to claim 2, characterized in that: The top end of the handwheel (10) is designed to be cylindrical, and anti-slip patterns are provided on the surface of the handwheel (10).

6. The airtightness test device according to claim 2, wherein: The transmission block (11) is designed in a cross shape, and through holes adapted to the transmission block (11) are opened in the movable bin (8).

7. The airtightness test device according to claim 2, characterized in that: The roller wheel (13) is made of metal, and the roller wheel (13) is a one-way pulley.

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