Rapid pressing tool for heat exchange tube

Abstract

The utility model provides a heat exchange tube quick pressing tool which comprises a locking mechanism, plugging devices and a pressing pump which are fixedly connected in sequence, a heat exchange tube is fixedly arranged in the locking mechanism, the two ends of the heat exchange tube are provided with the plugging devices for plugging, and the plugging device at one end is provided with a pressing hole communicated with the pressing pump. The locking mechanism comprises a supporting cylinder, a locking bolt and a fixing bolt, an arc-shaped upper protective tile and an arc-shaped lower protective tile are arranged on the outer side of the heat exchange tube and integrally arranged in an inner cavity of the supporting cylinder, the locking bolt is arranged at the position, corresponding to the upper protective tile, of the supporting cylinder, and the fixing bolt is arranged at the position, corresponding to the lower protective tile, of the supporting cylinder. And the lower protective tile is provided with a fixing groove corresponding to the fixing bolt. The clamping device has the advantages that the heat exchange tubes are wrapped by the arc-shaped upper protective tile and the arc-shaped lower protective tile, the heat exchange tubes of different sizes can be rapidly clamped by combining the matching of the locking bolts and the fixing bolts, loosening or slipping caused by pressure fluctuation in the testing process is avoided, and the overall stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure testing tooling technology, specifically to a rapid pressure testing tooling for heat exchanger tubes. Background Technology

[0002] In the manufacturing of heat exchanger equipment, heat exchange tubes, as core pressure-bearing components, directly determine the safety, reliability, and service life of the equipment. Heat exchange tubes must meet stringent material standards and manufacturing process requirements to ensure stable performance under complex conditions such as high temperature, high pressure, and corrosive media. Material selection must consider corrosion resistance, fatigue resistance, and high-temperature strength, while the manufacturing process requires precise control of molding accuracy, welding quality, and assembly stress to avoid potential defects such as microcracks and stress corrosion. Simultaneously, the design of heat exchange tubes must balance heat transfer efficiency and structural strength, achieving an optimal balance between performance and lifespan through optimization of tube diameter, wall thickness, and connection methods.

[0003] The current pressure testing process for heat exchanger tubes still employs the traditional method of hydrostatic testing one tube at a time. This is not only cumbersome and time-consuming, but also has numerous technical limitations. This process, which relies entirely on manual clamping, water injection, and pressure holding, not only increases the labor intensity of operators but also significantly reduces production efficiency. More importantly, the judgment of pressure test results mainly depends on reading the pressure gauge visually. This method is susceptible to visual errors and environmental interference, making it difficult to accurately identify minute pressure drop changes, potentially leading to missed defects. For heat exchanger tubes of different specifications and materials, existing tooling lacks flexibility and adaptability, failing to achieve rapid switching and precise sealing, further restricting the improvement of pressure testing efficiency.

[0004] Therefore, how to design a rapid pressure testing fixture for heat exchanger tubes to achieve accurate and efficient pressure testing of heat exchanger tubes of different diameters and lengths has become an urgent problem to be solved. Utility Model Content

[0005] The purpose of this invention is to achieve precise and efficient pressure testing of heat exchange tubes of different diameters and lengths.

[0006] This utility model provides a quick pressure testing fixture for heat exchanger tubes, including a locking mechanism, a sealing device, and a pressure pump that are fixedly connected in sequence. The heat exchanger tube is fixedly installed in the locking mechanism, and the two ends of the heat exchanger tube are sealed by the sealing device. One end of the sealing device has a pressure testing hole connected to the pressure pump. The locking mechanism includes a support cylinder, locking bolts, and fixing bolts. Arc-shaped upper and lower protective tiles are respectively installed on the outside of the heat exchanger tube and are integrally installed in the inner cavity of the support cylinder. Locking bolts are installed on the support cylinder at the position corresponding to the upper protective tile, and fixing bolts are installed on the support cylinder at the position corresponding to the lower protective tile. The lower protective tile has a fixing groove at the position corresponding to the fixing bolt.

[0007] As a preferred embodiment, a high-pressure sealing gasket is provided on the inner wall of the sealing device at the position corresponding to the end of the heat exchange tube, and the high-pressure sealing gasket is a nitrile rubber gasket.

[0008] As a preferred embodiment, a detachable connector is provided on the outside of the pressure hole to connect to the outer pipe of the pressure pump.

[0009] As a preferred embodiment, anti-slip buffer pads are fixedly installed on the inner sides of the upper and lower protective tiles.

[0010] As a preferred embodiment, the upper protective tile, the lower protective tile, and the anti-slip buffer pad are provided with multiple concave and convex joint points to prevent slippage.

[0011] As a preferred embodiment, the outer end of the locking mechanism is provided with a detachable heat exchange tube connector, and a through hole adapted to the outer diameter of the heat exchange tube is opened in the center of the heat exchange tube connector.

[0012] As a preferred option, the connection positions of the heat exchanger tube connector, locking mechanism, sealing device, and connector are threaded to achieve a detachable connection.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model uses arc-shaped upper and lower protective tiles to enclose the heat exchange tubes. Combined with locking bolts and fixing bolts, it can quickly clamp heat exchange tubes of different sizes, preventing loosening or slippage caused by pressure fluctuations during testing and improving overall stability. Furthermore, the anti-slip buffer pads on the inner sides of the upper and lower protective tiles reduce frictional damage to the surface of the heat exchange tubes and buffer vibrations during pressurization, protecting the integrity of the heat exchange tubes.

[0015] 2. This utility model incorporates a high-pressure resistant and oil-resistant nitrile rubber gasket within the sealing device, effectively preventing liquid or gas leakage during pressure testing and ensuring the stability of the test pressure. It is suitable for simulating high-pressure extreme working conditions. Attached Figure Description

[0016] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the locking mechanism of this utility model.

[0019] The numbers in the attached diagram are:

[0020] 1. Heat exchanger tube connector; 2. Locking mechanism; 21. Support cylinder; 22. Locking bolt; 23. Fixing bolt; 24. Upper protective tile; 25. Lower protective tile; 3. High-pressure sealing gasket; 4. Sealing device; 5. Connector; 6. Pressure pump; 7. Heat exchanger tube; 8. Anti-slip buffer pad. Detailed Implementation

[0021] To illustrate the features of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will further explain this utility model.

[0022] Example:

[0023] Please see Figures 1 to 2 This utility model provides a quick pressure testing fixture for heat exchange tubes, including a locking mechanism 2, a sealing device 4, and a pressure pump 6 that are fixedly connected in sequence. The heat exchange tube 7 is fixedly installed in the locking mechanism 2, and the two ends of the heat exchange tube 7 are sealed by the sealing device 4. One end of the sealing device 4 has a pressure testing hole connected to the pressure pump 6.

[0024] This embodiment improves the structure of the locking mechanism 2. Specifically, the locking mechanism 2 includes a support cylinder 21, locking bolts 22, and fixing bolts 23. Arc-shaped upper protective tiles 24 and lower protective tiles 25 are respectively installed on the outer side of the heat exchange tube 7 and are integrally set within the inner cavity of the support cylinder 21. Locking bolts 22 are installed on the support cylinder 21 corresponding to the position of the upper protective tile 24, and fixing bolts 23 are installed on the support cylinder 21 corresponding to the position of the lower protective tile 25. The lower protective tile 25 has a fixing groove corresponding to the position of the fixing bolt 23. By wrapping the heat exchange tube with the arc-shaped upper and lower protective tiles, combined with the cooperation of the locking bolts and fixing bolts, heat exchange tubes of different sizes can be quickly clamped, preventing loosening or slippage due to pressure fluctuations during testing and improving overall stability.

[0025] Preferably, in this embodiment, a high-pressure sealing gasket 3 is provided on the inner wall of the sealing device 4 at the position corresponding to the end of the heat exchange tube 7. The high-pressure sealing gasket 3 is a nitrile rubber gasket. The installation of a high-pressure resistant and oil-resistant nitrile rubber gasket in the sealing device effectively prevents liquid or gas leakage during pressure testing, ensures the stability of the test pressure, and is suitable for simulating high-pressure extreme conditions.

[0026] Preferably, in this embodiment, a detachable connector 5 is provided on the outside of the pressure hole to connect to the outer pipe of the pressure pump 6.

[0027] Preferably, in this embodiment, anti-slip buffer pads 8 are fixedly provided on the inner sides of the upper protective tile 24 and the lower protective tile 25. Furthermore, in this embodiment, multiple concave and convex engagement points are provided at the joint positions of the upper protective tile 24, the lower protective tile 25, and the anti-slip buffer pads 8 to prevent slippage. The anti-slip buffer pads on the inner sides of the upper and lower protective tiles can reduce frictional damage to the surface of the heat exchange tubes, while also buffering vibrations during the pressurization process and protecting the integrity of the heat exchange tubes.

[0028] Preferably, in this embodiment, a detachable heat exchange tube connector 1 is provided at the outer end of the locking mechanism 2, and a through hole adapted to the outer diameter of the heat exchange tube is opened in the center of the heat exchange tube connector 1.

[0029] Preferably, in this embodiment, threads are provided at the connection positions of the heat exchange tube connector 1, the locking mechanism 2, the sealing device 4, and the connector 5 to achieve a detachable connection.

[0030] The above embodiments and accompanying drawings are only used to illustrate the technical solutions of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model. Other related technical structures not disclosed in detail in this utility model are existing technologies in the art.

Claims

1. A quick pressure testing fixture for a heat exchanger tube, comprising a locking mechanism (2), a sealing device (4), and a pressure pump (6) connected in sequence, wherein a heat exchanger tube (7) is fixedly disposed within the locking mechanism (2), and the two ends of the heat exchanger tube (7) are sealed by the sealing device (4), wherein one end of the sealing device (4) has a pressure testing hole connected to the pressure pump (6), characterized in that: The locking mechanism (2) includes a support cylinder (21), a locking bolt (22) and a fixing bolt (23). The heat exchange tube (7) is provided with an arc-shaped upper protective tile (24) and a lower protective tile (25) respectively, and is set as a whole in the inner cavity of the support cylinder (21). The support cylinder (21) is provided with a locking bolt (22) corresponding to the position of the upper protective tile (24), and the support cylinder (21) is provided with a fixing bolt (23) corresponding to the position of the lower protective tile (25). The lower protective tile (25) is provided with a fixing groove corresponding to the position of the fixing bolt (23).

2. The heat exchanger tube rapid pressure testing fixture according to claim 1, characterized in that: The sealing device (4) has a high-pressure sealing gasket (3) installed on the inner wall at the position corresponding to the end of the heat exchange tube (7). The high-pressure sealing gasket (3) is a nitrile rubber gasket.

3. The rapid pressure testing fixture for heat exchanger tubes according to claim 1, characterized in that: A detachable connector (5) is provided on the outside of the pressure hole to connect to the outer pipe of the pressure pump (6).

4. The rapid pressure testing fixture for heat exchanger tubes according to claim 1, characterized in that: Anti-slip buffer pads (8) are fixedly installed on the inner sides of the upper protective tile (24) and the lower protective tile (25).

5. The heat exchanger tube rapid pressure testing fixture according to claim 4, characterized in that: The upper protective tile (24), the lower protective tile (25), and the anti-slip buffer pad (8) are provided with multiple concave and convex joint points to prevent slippage.

6. The rapid pressure testing fixture for heat exchanger tubes according to claim 1, characterized in that: The outer end of the locking mechanism (2) is provided with a detachable heat exchange tube connector (1), and a through hole adapted to the outer diameter of the heat exchange tube is opened in the center of the heat exchange tube connector (1).

7. The heat exchanger tube rapid pressure testing fixture according to claim 6, characterized in that: The heat exchange tube connector (1), locking mechanism (2), sealing device (4) and connector (5) are threaded to achieve detachable connection.

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