Safe and reliable composite pipe inner pressure testing device

Abstract

A safe and reliable composite pipe inner pressure testing device comprises a composite pipe and two clamp bodies. An extension pipe end is arranged on the clamp body and used for being connected with the inner wall of the composite pipe in a sealed mode. Toothed cushion blocks are arranged on the outer sides of the two ends of the composite pipe. The toothed cushion block is provided with meshing teeth used for meshing the composite pipe. The clamp body is connected with a clamping sleeve through a bolt assembly. The clamping sleeve moves towards the clamp body to extrude the toothed cushion block, so that the composite pipe is connected with the extension pipe end in a sealed mode, and the outer sides of the two ends of the composite pipe are each sleeved with a reinforcing outer layer. The reinforced outer layer is positioned between the composite pipe and the toothed cushion block; a plurality of anti-loose outer rods are connected between the two clamp main bodies; the two ends of the anti-loosening outer rod penetrate through the two clamp bodies correspondingly and are in threaded connection with nuts. According to the utility model, the obtained test structure is more accurate; and after the composite pipe is exploded, the two clamp main bodies are not easy to splash, so that the test is safer.

Description

Technical Field

[0001] The utility model relates to an internal pressure testing device, in particular to a safe and reliable composite pipe internal pressure testing device. Background Art

[0002] After the existing composite pipe is manufactured, it is generally necessary to test its internal pressure resistance. The existing composite pipe internal pressure testing device, for example, is a composite pipe pressure test fixture with patent number CN207832576U. The test fixture of this patent clamps the two ends of the composite pipe by using slips. Specifically, the composite pipe is fixed by the slip teeth below the slips. During the test, due to the bite force of the slip teeth, the stress of the composite pipe is concentrated at the bite point between the slip teeth and the composite pipe during the continuous internal pressure application. As a result, when the composite pipe cannot withstand the internal pressure and explodes, it will first explode at the bite point. The internal pressure resistance value of the composite pipe is not accurate. The reliable test result should be the internal pressure resistance value obtained when the explosion position is located at the composite pipe section where the slips are not in contact. In addition, the existing composite pipe test generally fixes the two ends of the composite pipe by two fixture bodies. When the composite pipe explodes, there is no connection structure between the two fixture bodies, and it is easy to splash, thereby causing harm to the tester. Utility Model Content

[0003] The utility model aims to solve the technical problem of providing a composite pipe internal pressure testing device with a connection structure between two clamp bodies and reinforced outer layers at both ends of the composite pipe. The testing device is relatively safe and reliable.

[0004] In order to solve the above technical problems, the technical solution of the utility model is a safe and reliable composite pipe internal pressure testing device:

[0005] It includes a composite pipe and two clamp bodies that are respectively sealed and connected to the two ends of the composite pipe; the clamp body is provided with an extension pipe end, and one of the two clamp bodies is provided with a water injection hole for connecting a pressure device in the middle part, and the extension pipe end is used to be sealed and connected to the inner wall of the composite pipe; toothed pads are provided on the outer sides of both ends of the composite pipe; the toothed pads are provided with engaging teeth for biting the composite pipe; a clamping sleeve is connected to the clamp body by a bolt assembly; the clamping sleeve moves toward the clamp body to squeeze the toothed pad, so that the composite pipe and the extension pipe end are sealed and connected, and a reinforced outer layer is provided on the outer sides of both ends of the composite pipe; the reinforced outer layer is located between the composite pipe and the toothed pad; a plurality of anti-loosening outer rods are connected between the two clamp bodies; the two ends of the anti-loosening outer rods are respectively threaded and connected with nuts through the two clamp bodies.

[0006] An O-shaped sealing ring and a Y-shaped sealing ring are connected between the extension pipe end and the composite pipe.

[0007] Four anti-loosening outer rods are connected between the two clamp bodies; the four anti-loosening outer rods rotate around the axis of the clamp body and are evenly distributed on the clamp body.

[0008] The composite pipe consists of an inner lining layer and a reinforcement layer located outside the inner lining layer; the reinforced outer layer is located outside the reinforcement layer.

[0009] The inner lining layer is plastic polyethylene, the reinforcement layer is made of glass fiber reinforced polyethylene prepreg tape, the winding angle is 55°, the reinforced outer layer is made of the same glass fiber reinforced polyethylene prepreg tape, the winding angle is 85°, the prepreg tape thickness is 0.3mm, 4 layers are wound, and the reinforcement layer length is 20cm.

[0010] The length of the engaging teeth is 10 mm, the bevel angle is 10°, and the tooth depth is 1 mm; the length of the toothed pad is 16 cm, and the outer bevel angle of the toothed pad is 10°.

[0011] The inner lining layer is a steel pipe, and the reinforcement layer is formed by winding glass fiber reinforced epoxy resin. The winding angle is 88 degrees, the thickness of the winding layer is 1.5 mm, and the length of the reinforced outer layer is 20 cm.

[0012] The length of the engaging teeth is 10 mm, the bevel angle is 15°, and the tooth depth is 1 mm; the toothed pad is 16 cm, and the outer bevel angle of the toothed pad is 15°.

[0013] The technical effects achieved by the utility model are as follows: a safe and reliable composite pipe internal pressure testing device is provided in the utility model, by arranging a reinforced outer layer between the composite pipe and the toothed pad, thereby reducing the stress between the toothed pad and the composite pipe, so that the bursting point is not located at the bite point of the toothed pad and the composite pipe, and the obtained test structure is more accurate; and an anti-loosening outer rod is connected between the two clamp bodies in the utility model, and the two ends of the anti-loosening outer rod are respectively threaded through the two clamp bodies and connected with nuts, and the two clamp bodies are connected by the anti-loosening outer rod and the nut. After the composite pipe explodes, the two clamp bodies are not easy to splash apart, and the test is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0015] Figure 1 This is a structural diagram of a safe and reliable composite pipe internal pressure testing device of the utility model;

[0016] Figure 2 yes Figure 1 Magnified view of part A. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] See Figures 1 to 2 .

[0019] A safe and reliable composite pipe internal pressure testing device comprises a composite pipe 1 and two fixture bodies 5 respectively sealedly connected to the two ends of the composite pipe 1, with an extension pipe end 56 provided on the fixture body 5; one of the two fixture bodies 5 has a water injection hole 55 for connecting a pressure device in the middle; the extension pipe end 56 is used to be sealed and connected to the inner wall of the composite pipe 1, and toothed pads 2 are provided on the outer sides of both ends of the composite pipe 1, and the toothed pads 2 are provided with engaging teeth 21 for engaging the composite pipe 1, and a clamping sleeve 3 is connected to the fixture body 5 by a bolt assembly 4, and the clamping sleeve 3 moves toward the fixture body 5 to squeeze the toothed pad 2, so that the composite pipe 1 and the extension pipe end 56 are connected. 6 sealed connection, the outer sides of both ends of the composite tube 1 are both covered with a reinforced outer layer 13, the reinforced outer layer 13 is located between the composite tube 1 and the toothed gasket 2, specifically, an O-ring 52 and a Y-ring 54 are connected between the extension tube end 56 and the composite tube 1, and the O-ring 52 and the Y-ring 54 are used to seal the composite tube 1 and the extension tube end 56; a plurality of anti-loosening outer rods 6 are connected between the two clamp bodies 5, and both ends of the anti-loosening outer rod 6 are respectively threaded through the two clamp bodies 5 and connected with nuts 7; specifically, four anti-loosening outer rods 6 are connected between the two clamp bodies 5, and the four anti-loosening outer rods 6 rotate around the axis of the clamp body 5 and are evenly distributed on the clamp body 5.

[0020] The present invention provides a reinforced outer layer 13 between the composite pipe 1 and the toothed pad 2, and reduces the stress between the toothed pad 2 and the composite pipe 1 by the reinforced outer layer 13, so that the blasting position is not located at the bite of the toothed pad 2 and the composite pipe 1, and the obtained test structure is more accurate; in the connection between the two clamp bodies 5, the present invention connects four anti-loosening outer rods 6 between the two clamp bodies 5, and both ends of the four anti-loosening outer rods 6 are respectively passed through the two clamp bodies 5 and are threadedly connected with nuts 7, and the two clamp bodies 5 are limited by the anti-loosening outer rods 6 and the nuts 7 at both ends of the anti-loosening outer rods 6, so that when the composite pipe 1 explodes, the two clamp bodies 5 are not prone to splashing, and the test is safer.

[0021] Specifically, the composite pipe 1 of the present invention is composed of an inner lining layer 11 and a reinforcement layer 12 located outside the inner lining layer 11 , and a reinforced outer layer 13 located outside the reinforcement layer 12 .

[0022] Preferably, the inner lining layer 11 of the utility model is plastic polyethylene, the reinforcement layer 12 is formed by winding a glass fiber reinforced polyethylene prepreg tape with a winding angle of 55°, and the reinforced outer layer 13 is formed by winding the same glass fiber reinforced polyethylene prepreg tape with a winding angle of 85°. The prepreg tape has a thickness of 0.3 mm, is wound in 4 layers, and has a reinforcement layer length of 20 cm; the bite teeth 21 are 10 mm long, the bevel angle is 10°, and the tooth depth is 1 mm; the toothed pad 2 is 16 cm long, and the outer bevel angle of the toothed pad 2 is 10°.

[0023] Of course, as another option, the inner lining layer 11 of the utility model can also be a steel pipe, the reinforcement layer 12 is made of glass fiber reinforced epoxy resin, the winding angle is 88°, the winding layer thickness is 1.5mm, and the reinforced outer layer 13 is 20cm long; the bite tooth 21 is 10mm long, the bevel angle is 15°, the tooth depth is 1mm, the toothed pad 2 is 16cm, and the outer bevel angle of the toothed pad 2 is 15°.

Claims

1. A safe and reliable composite pipe internal pressure testing device, comprising a composite pipe (1) and two clamp bodies (5) respectively sealedly connected to the two ends of the composite pipe (1); an extension pipe end (56) is provided on the clamp body (5), and a water injection hole (55) for connecting a pressure device is opened in the middle of one of the two clamp bodies (5), and the extension pipe end (56) is used to be sealed and connected to the inner wall of the composite pipe (1); toothed pads (2) are provided on the outer sides of both ends of the composite pipe (1); the toothed pads (2) are provided with engaging teeth (21) for engaging the composite pipe (1); a clamping sleeve (3) is connected to the clamp body (5) through a bolt assembly (4); the clamping sleeve (3) moves toward the clamp body (5) to squeeze the toothed pad (2), so that the composite pipe (1) and the extension pipe end (56) are sealed and connected, characterized in that: Both ends of the composite tube (1) are covered with a reinforced outer layer (13); the reinforced outer layer (13) is located between the composite tube (1) and the toothed pad (2); a plurality of anti-loosening outer rods (6) are connected between the two clamp bodies (5); the two ends of the anti-loosening outer rods (6) respectively pass through the two clamp bodies (5) and are threadedly connected to nuts (7).

2. A safe and reliable composite pipe internal pressure testing device according to claim 1, characterized in that: An O-shaped sealing ring (52) and a Y-shaped sealing ring (54) are connected between the extension tube end (56) and the composite tube (1).

3. A safe and reliable composite pipe internal pressure testing device according to claim 1, characterized in that: Four anti-loosening outer rods (6) are connected between the two clamp bodies (5); the four anti-loosening outer rods (6) are evenly distributed on the clamp body (5) and rotate around the axis of the clamp body (5).

4. A safe and reliable composite pipe internal pressure testing device according to claim 1, characterized in that: The composite pipe (1) consists of an inner lining layer (11) and a reinforcement layer (12) located outside the inner lining layer (11); the reinforced outer layer (13) is located outside the reinforcement layer (12).

5. A safe and reliable composite pipe internal pressure testing device according to claim 4, characterized in that: The inner lining layer (11) is plastic polyethylene, the reinforcement layer (12) is formed by winding glass fiber reinforced polyethylene prepreg tape, the winding angle is 55 degrees, the reinforcement outer layer (13) is formed by winding the same glass fiber reinforced polyethylene prepreg tape, the winding angle is 85 degrees, the prepreg tape thickness is 0.3 mm, 4 layers are wound, and the reinforcement layer length is 20 cm.

6. A safe and reliable composite pipe internal pressure testing device according to claim 5, characterized in that: The engaging teeth (21) are 10 mm long, have a bevel angle of 10°, and a tooth depth of 1 mm; the toothed pad (2) is 16 cm long, and has an outer bevel angle of 10°.

7. A safe and reliable composite pipe internal pressure testing device according to claim 4, characterized in that: The inner lining layer (11) is a steel pipe, the reinforcement layer (12) is formed by winding glass fiber reinforced epoxy resin, the winding angle is 88 degrees, the winding layer thickness is 1.5mm, and the length of the reinforced outer layer (13) is 20cm.

8. A safe and reliable composite pipe internal pressure testing device according to claim 7, characterized in that: The engaging teeth (21) are 10 mm long, have a bevel angle of 15°, and a tooth depth of 1 mm; the toothed pad (2) is 16 cm long, and has an outer bevel angle of 15°.

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