Rapid pressure test tool for U-shaped heat exchange tube

Abstract

The utility model provides a rapid pressure test tool for a U-shaped heat exchange tube, and belongs to the technical field of pressure test tools. The rapid pressure test tool solves the problem that an existing rapid pressure test tool is poor in installation efficiency and practicability. The rapid pressure test tool for the U-shaped heat exchange tube comprises two tool bases, each tool base comprises a clamping support and a blocking support located on one side of the clamping support, each clamping support comprises an upper supporting block, the lower end face of each upper supporting block is provided with a V-shaped pressing face, a clamping driving piece is fixed to each clamping support, and the clamping driving pieces are fixed to the upper supporting blocks. The clamping driving piece is connected with the upper supporting block and can drive the upper supporting block to press the U-shaped heat exchange tube on the clamping support, the plugging support comprises a plugging driving piece installed on the tool base, and a driving rod of the plugging driving piece is connected with a pressure test plug capable of sealing a tube opening of the U-shaped heat exchange tube. The rapid pressure test tool for the U-shaped heat exchange tube facilitates the installation of the U-shaped heat exchange tube and improves the practicability of the pressure test tool.

Description

Technical Field

[0001] This utility model belongs to the field of pressure testing fixture technology, and relates to a rapid pressure testing fixture for a U-shaped heat exchanger tube. Background Technology

[0002] U-tube heat exchangers are currently widely used in industries such as petrochemicals, soda ash, chemicals, and fertilizers. According to GB / T151-2014, each U-tube in these heat exchangers must undergo a hydrostatic test during manufacturing. The test pressure must not be less than the heat exchanger's pressure resistance test pressure (the higher of the tube and shell side test pressures). Figure 1 As shown, the existing U-shaped heat exchange tube 5 includes two parallel straight pipe sections 51 and an arc-shaped U-shaped connecting pipe section 52 that connects the two straight pipe sections 51.

[0003] Existing U-shaped heat exchanger tube pressure testing devices, such as the one disclosed in Chinese patent application [Authorization Announcement No.: CN208313722U], include a fixing component for fixing the U-shaped heat exchanger tube, a sealing component including a sealing block and a connecting block, which are used to seal the two ports of the U-shaped heat exchanger tube respectively, and the U-shaped heat exchanger tube is connected to the inlet pipe and the pressure testing pipe through the connecting block, a pressure testing component connected to the pressure testing pipe for pressurizing the U-shaped heat exchanger tube, and a fixing component including a worktable, two mounting blocks, and a fixing mechanism, wherein the worktable... The system is equipped with a slide rail, on which two mounting blocks are slidably mounted. These blocks are used to mount the two arms of the U-shaped heat exchanger tube. A fixing mechanism is used to abut and fix the U-shaped heat exchanger tube to the mounting blocks. The fixing mechanism includes two cylinders that correspond one-to-one with the two mounting blocks. By controlling the piston rods of the cylinders to press against the arms of the U-shaped heat exchanger tube, the U-shaped heat exchanger tube is fixed to the mounting blocks. The two arms of the U-shaped heat exchanger tube pass through two through holes in the mounting blocks, and the piston rods of the cylinders extend into the side holes that communicate with the vertical through holes to press against the arms of the U-shaped heat exchanger tube, thereby completing the fixing of the U-shaped heat exchanger tube.

[0004] The above structure involves fixing the two arms of the U-shaped heat exchange tube to the mounting block, and then using the piston rod of the cylinder to extend through the side hole connected by the vertical through hole to press against the arms of the U-shaped heat exchange tube. However, since the outer surface of the arms of the U-shaped heat exchange tube is arc-shaped, the piston rod is prone to slippage during the pressing process. Furthermore, it can only position U-shaped heat exchange tubes with small size differences, reducing the installation efficiency and practicality of the pressure testing device. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a rapid pressure testing fixture for U-shaped heat exchange tubes. The technical problem this invention aims to solve is: how to address the poor installation efficiency and practicality of existing rapid pressure testing fixtures.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A rapid pressure testing fixture for a U-shaped heat exchanger tube includes two fixture bases, each base comprising a clamping bracket and a sealing bracket located on one side of the clamping bracket. The clamping bracket includes an upper support block with a V-shaped pressing surface on its lower end face. A clamping drive component is fixed to the clamping bracket, connected to the upper support block and capable of driving the upper support block to press the U-shaped heat exchanger tube firmly onto the clamping bracket. The sealing bracket includes a sealing drive component mounted on the fixture base. A pressure testing plug capable of sealing the opening of the U-shaped heat exchanger tube is connected to the drive rod of the sealing drive component. An inlet or outlet water pipe, communicating with the U-shaped heat exchanger tube through the pressure testing plug, is connected to the drive rod. A pressure measuring device is connected to the outlet water pipe.

[0008] By first placing two straight sections of the U-shaped heat exchanger tube on the clamping bracket, the clamping drive unit drives the upper support block to move downwards, and the straight sections are pressed against the clamping support frame by the pressing surface, thus achieving the positioning of the U-shaped heat exchanger tube. After positioning, the sealing drive unit is driven, which moves the pressure test plug to block the opening of the straight section of the U-shaped heat exchanger tube. The inlet and outlet water pipes are then connected to the corresponding water pipes, and test water is injected into the U-shaped heat exchanger tube and gradually pressurized. By measuring the water pressure at the outlet water pipe, the pressure resistance test of the U-shaped heat exchanger tube is achieved. The V-shaped pressing surface can be used to press and position U-shaped heat exchanger tubes with large differences in outer diameter, increasing the practicality of the pressure testing fixture. Furthermore, the V-shaped pressing surface can stably press the straight sections against the clamping bracket, facilitating the installation of the U-shaped heat exchanger tube and improving the practicality of the pressure testing fixture.

[0009] The pressure measuring device is a pressure gauge, the sealing drive is a sealing cylinder, and the clamping drive is a clamping cylinder.

[0010] In the aforementioned rapid pressure testing fixture for U-shaped heat exchange tubes, the clamping bracket includes a lower support block fixed to the fixture base. The upper end face of the lower support block has a V-shaped support surface, and the pressing surface is positioned directly opposite the support surface.

[0011] To improve the stable positioning of the U-shaped heat exchanger tube, the straight pipe section of the U-shaped heat exchanger tube is limited and clamped by setting up V-shaped support and clamping surfaces, which facilitates the positioning of U-shaped heat exchanger tubes with different outer diameters and further improves the practicality of the pressure testing fixture.

[0012] In the aforementioned rapid pressure testing fixture for the U-shaped heat exchanger tube, the upper end face of the lower support block has two support planes, and the support surface is located between the two support planes. The lower end face of the upper support block has two limiting planes, and the pressing surface is located between the two limiting planes. There is always a clamping gap between the support plane and the corresponding limiting plane.

[0013] Through the cooperation of two supporting planes and two limiting planes, and after clamping the corresponding straight pipe section, there is always a clamping gap between the supporting plane and the corresponding limiting plane, so that the upper support block and the lower support block can stably clamp the straight pipe section of the U-shaped pipe, and also improve the structural strength of the upper support block and the lower support block.

[0014] In the aforementioned rapid pressure testing fixture for U-shaped heat exchange tubes, the pressure testing plug has a large-diameter end and a small-diameter end that can be embedded in the opening of the U-shaped heat exchange tube. The pressure testing plug has a conical sealing surface, and the outer diameter of the pressure testing plug gradually decreases from the large-diameter end to the small-diameter end.

[0015] By setting the pressure test plug with a small-diameter end and a large-diameter end, and by setting the sealing surface, it is suitable for sealing the pipe openings of straight pipe sections with different outer diameters. This allows the pressure test plug to be used to seal U-shaped heat exchange tubes with different outer diameters without frequent replacement, thus improving the practicality of the pressure test fixture.

[0016] In the aforementioned rapid pressure testing fixture for U-shaped heat exchange tubes, the clamping bracket includes two support rods connected to the fixture base. The upper ends of the two support rods are connected by a crossbar. The clamping drive is fixed on the crossbar, and a guide hole is provided on the crossbar. The drive shaft of the clamping drive passes through the guide hole and is fixedly connected to the upper end of the upper support block.

[0017] The guide holes on the crossbar guide the drive shaft of the clamping drive component, enabling the drive shaft to stably drive the upper support block to move vertically, thereby improving the stability of the pressure testing fixture.

[0018] In the aforementioned rapid pressure testing fixture for the U-shaped heat exchanger tube, two connecting rods are threaded onto the fixture base, and a clamping plate is sleeved on the upper end of the two connecting rods. The sealing drive component is pressed onto the fixture base by the clamping plate.

[0019] Because the U-shaped heat exchange tubes of different outer diameters are replaced, the central axis of the U-shaped heat exchange tubes is raised. At this time, a gasket can be added to the lower end of the sealing drive component to simultaneously raise the height of the pressure test plug. After being raised, it can be stably positioned on the tooling base by the clamping plate and two connecting rods, so as to stably seal the opening of the U-shaped heat exchange tube.

[0020] Compared with existing technologies, this rapid pressure testing fixture for U-shaped heat exchange tubes has the following advantages: the V-shaped clamping surface can be used to clamp and position U-shaped heat exchange tubes with large differences in outer diameter, increasing the practicality of the pressure testing fixture. Furthermore, the V-shaped clamping surface can stably clamp the straight pipe section onto the clamping bracket, facilitating the installation of the U-shaped heat exchange tube and improving the practicality of the pressure testing fixture. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the existing U-shaped heat exchanger tube.

[0022] Figure 2 This is a schematic diagram of the structure of this utility model with a U-shaped heat exchange tube installed.

[0023] Figure 3 yes Figure 2 A magnified view of the central area.

[0024] Figure 4 This is a schematic diagram of the structure of the tooling base with a water outlet pipe after installation in this utility model.

[0025] Figure 5 This is a structural schematic diagram of the tooling base in this utility model.

[0026] In the diagram, 1. Tooling base; 11. Connecting rod; 12. Clamping plate; 2. Clamping bracket; 21. Upper support block; 21a. Clamping surface; 21b. Limiting plane; 22. Clamping drive component; 22a. Drive shaft; 23. Lower support block; 23a. Support surface; 23b. Support plane; 24. Support rod; 25. Crossbar; 25a. Guide hole; 3. Sealing bracket; 31. Sealing drive component; 31a. Drive rod; 31a1. Inlet pipe; 31a2. Outlet pipe; 32. Pressure test plug; 32a. Large diameter end; 32b. Small diameter end; 32c. Sealing surface; 4. Pressure measuring device; 5. U-shaped heat exchange tube; 51. Straight pipe section; 52. U-shaped connecting pipe section; 6. Clamping gap. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] like Figure 2 As shown, the rapid pressure testing fixture for this U-shaped heat exchanger tube includes two fixture bases 1, each of which includes a clamping bracket 2 and a sealing bracket 3 located on one side of the clamping bracket 2.

[0029] Specifically, such as Figure 2-5As shown, the clamping bracket 2 includes an upper support block 21. The lower end face of the upper support block 21 has a V-shaped pressing surface 21a. A clamping drive component 22 is fixed on the clamping bracket 2. The clamping drive component 22 is connected to the upper support block 21 and can drive the upper support block 21 to press the U-shaped heat exchange tube 5 onto the clamping bracket 2. The sealing bracket 3 includes a sealing drive component 31 installed on the tooling base 1. A pressure test plug 32 that can seal the opening of the U-shaped heat exchange tube 5 is connected to the drive rod 31a of the sealing drive component 31. An inlet pipe 31a1 or an outlet pipe 31a2 that can communicate with the U-shaped heat exchange tube 5 through the pressure test plug 32 is connected to the drive rod 31a. A pressure measuring device 4 is connected to the outlet pipe 31a2.

[0030] First, the two straight pipe sections 51 of the U-shaped heat exchanger tube 5 are placed on the clamping bracket 2. The clamping drive 22 drives the upper support block 21 to move downward, and the straight pipe sections 51 are pressed against the clamping support bracket by the pressing surface 21a, thus achieving the positioning of the U-shaped heat exchanger tube 5. After positioning, the sealing drive 31 is driven, which drives the test plug 32 to block the pipe opening of the straight pipe section 51 of the U-shaped heat exchanger tube 5. The inlet pipe 31a1 and the outlet pipe 31a2 are then connected to the corresponding water pipes, and the test... Test water is injected into the U-shaped heat exchange tube 5 and gradually pressurized. By measuring the water pressure at the outlet pipe 31a2, the pressure resistance test of the U-shaped heat exchange tube 5 is achieved. The V-shaped clamping surface 21a can be used to clamp and position the U-shaped heat exchange tube 5 with large outer diameter differences, which increases the practicality of the pressure test fixture. Furthermore, the V-shaped clamping surface 21a can stably clamp the straight pipe section 51 onto the clamping bracket 2, which facilitates the installation of the U-shaped heat exchange tube 5 and improves the practicality of the pressure test fixture.

[0031] like Figure 3-5 As shown, the clamping bracket 2 includes a lower support block 23 fixed to the tooling base 1. The upper end face of the lower support block 23 has a V-shaped support surface 23a. The pressing surface 21a is arranged vertically opposite to the support surface 23a. The upper end face of the lower support block 23 has two support planes 23b. The support surface 23a is located between the two support planes 23b. The lower end face of the upper support block 21 has two limiting planes 21b. The pressing surface 21a is located between the two limiting planes 21b. There is always a clamping gap 6 between the support plane 23b and the corresponding limiting plane 21b. The clamping bracket 2 includes two support rods 24 connected to the tooling base 1. The upper ends of the two support rods 24 are connected by a crossbar 25. The clamping drive component 22 is fixed on the crossbar 25. A guide hole 25a is provided on the crossbar 25. The drive shaft 22a of the clamping drive component 22 passes through the guide hole 25a and is fixedly connected to the upper end of the upper support block 21.

[0032] like Figure 3 and Figure 4As shown, the pressure test plug 32 has a large diameter end 32a and a small diameter end 32b that can be embedded in the opening of the U-shaped heat exchange tube 5. The pressure test plug 32 has a conical sealing surface 32c. The outer diameter of the pressure test plug 32 gradually decreases from the large diameter end 32a to the small diameter end 32b.

[0033] like Figure 2-4 As shown, two connecting rods 11 are threadedly connected to the tooling base 1, and a clamping plate 12 is sleeved on the upper end of the two connecting rods 11. The sealing drive component 31 is pressed onto the tooling base 1 by the clamping plate 12.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A rapid pressure testing fixture for a U-shaped heat exchanger tube, comprising two fixture bases (1), each fixture base (1) including a clamping bracket (2) and a sealing bracket (3) located on one side of the clamping bracket (2), characterized in that, The clamping bracket (2) includes an upper support block (21), the lower end face of which has a V-shaped pressing surface (21a). A clamping drive component (22) is fixed on the clamping bracket (2). The clamping drive component (22) is connected to the upper support block (21) and can drive the upper support block (21) to press the U-shaped heat exchange tube (5) onto the clamping bracket (2). The sealing bracket (3) includes components installed on the tooling base. The sealing drive component (31) of the seat (1) is connected to a pressure test plug (32) that can seal the opening of the U-shaped heat exchange tube (5) on the drive rod (31a) of the sealing drive component (31). The drive rod (31a) is connected to an inlet pipe (31a1) or an outlet pipe (31a2) that can communicate with the U-shaped heat exchange tube (5) through the pressure test plug (32). The outlet pipe (31a2) is connected to a pressure measuring device (4).

2. The rapid pressure testing fixture for the U-shaped heat exchanger tube according to claim 1, characterized in that, The clamping bracket (2) includes a lower support block (23) fixed to the tooling base (1). The upper end surface of the lower support block (23) has a V-shaped support surface (23a). The pressing surface (21a) and the support surface (23a) are arranged vertically opposite each other.

3. The rapid pressure testing fixture for the U-shaped heat exchanger tube according to claim 2, characterized in that, The upper end face of the lower support block (23) has two support planes (23b), and the support surface (23a) is located between the two support planes (23b). The lower end face of the upper support block (21) has two limiting planes (21b), and the pressing surface (21a) is located between the two limiting planes (21b). There is always a clamping gap (6) between the support plane (23b) and the corresponding limiting plane (21b).

4. The rapid pressure testing fixture for the U-shaped heat exchanger tube according to claim 1, 2, or 3, characterized in that, The pressure test plug (32) has a large diameter end (32a) and a small diameter end (32b) that can be embedded in the opening of the U-shaped heat exchange tube (5). The pressure test plug (32) has a conical sealing surface (32c). The outer diameter of the pressure test plug (32) gradually decreases from the large diameter end (32a) to the small diameter end (32b).

5. The rapid pressure testing fixture for the U-shaped heat exchanger tube according to claim 1, 2, or 3, characterized in that, The clamping bracket (2) includes two support rods (24) connected to the tooling base (1). The upper ends of the two support rods (24) are connected by a crossbar (25). The clamping drive (22) is fixed on the crossbar (25). A guide hole (25a) is provided on the crossbar (25). The drive shaft (22a) of the clamping drive (22) passes through the guide hole (25a) and is fixedly connected to the upper end of the upper support block (21).

6. The rapid pressure testing fixture for the U-shaped heat exchanger tube according to claim 1, 2, or 3, characterized in that, The tooling base (1) is threaded with two connecting rods (11), and the upper ends of the two connecting rods (11) are fitted with clamping plates (12). The sealing drive component (31) is pressed onto the tooling base (1) by the clamping plates (12).

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