Low-pressure U-shaped pipe pressure test tool

Abstract

The utility model discloses a low-pressure U-shaped pipe pressure test tool, comprising a support plate on which a U-shaped pipe is placed and limited by a limiting assembly; the joint assembly is combined with the end part of the U-shaped pipe and is sealed and fixed; the pressing plate is movably arranged above the supporting plate to press and fix the U-shaped pipe; a fluid channel is arranged on the connector assembly, and any end of the fluid channel is combined with the end of the U-shaped pipe to achieve sealing. According to the pressure test tool, the U-shaped pipe can be fixed through the limiting assembly, the pressing plate and the connector assembly on the supporting plate, so that the fluid channel on the connector assembly can be conveniently combined and sealed with the end of the U-shaped pipe, a pressure test is conveniently carried out, and the sealing performance and the pressure tolerance value of the U-shaped pipe are detected.

Description

Technical Field

[0001] The utility model relates to the technical field of U-shaped tube inspection, in particular to a low-pressure U-shaped tube pressure testing tool. Background Art

[0002] The U-tube is an important component of the heat exchanger in the pressure vessel. The quality of the U-tube directly affects the heat exchange effect of the heat exchanger during the working process and the safety of the heat exchanger. During production, the U-tube needs to be bent into shape from a straight tube. After the U-tube is bent and formed, it should be subjected to pressure leak detection tests one by one, such as air pressure tests and hydraulic tests, to check whether it has leaks. During the pressure test, the U-shaped heat exchange tube needs to be clamped and fixed by a clamping device. The traditional clamping device is very cumbersome to use, and clamping and disassembly are very time-consuming and labor-intensive, which leads to low efficiency of the U-shaped heat exchange tube pressure test, and after clamping, the end of the pipe is not convenient for a sealed connection with the external test device. Utility Model Content

[0003] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a low-pressure U-tube pressure test fixture, which can facilitate the fixing and pressing of the U-tube through the limit assembly, pressure plate and joint assembly on the support plate to achieve sealing. The fluid channel on the joint assembly is combined with the end of the U-tube to maintain the connection and perform pressure testing, thereby facilitating the detection of the sealing performance and pressure tolerance value of the U-tube.

[0004] The utility model is implemented by constructing a low-pressure U-shaped tube pressure test tool, including a support plate, a U-shaped tube placed thereon and limited by a limit assembly;

[0005] A joint assembly is combined with the end of the U-shaped tube to achieve sealing and fixation;

[0006] The pressing plate is movably arranged above the supporting plate to press and fix the U-shaped tube;

[0007] A fluid channel is provided on the joint assembly, and any end of the fluid channel is combined with the end of the U-shaped tube to achieve sealing.

[0008] Specifically, the limiting assembly includes several first limiting plates, second limiting plates and a top plate arranged in parallel above the support plate, the U-shaped tube is placed between the gaps between the several first limiting plates and / or second limiting plates, the top plate is arranged on the top end of the support plate and limits the arc end of the U-shaped tube, and the joint assembly is arranged on the end of the support plate away from the top plate.

[0009] Specifically, the pressure plate passes through the top of the second limiting plate and keeps sliding up and down. A positioning piece that passes through the pressure plate is provided on the support plate. A fastener is threadedly connected to the positioning piece. The pressure plate is pressed against the U-shaped tube by screwing the fastener.

[0010] Specifically, the contact surface between the top plate and the U-shaped tube is an arc-shaped surface.

[0011] Specifically, the joint assembly includes a joint seat, which is provided with a fluid channel and is connected to the end of the U-shaped tube;

[0012] A pressing piece is threadedly connected to the top plate of the notch and keeps the pressing end of the pressing piece in contact with the joint seat to press the joint seat onto the end of the U-shaped tube;

[0013] A plug-in unit is sleeved on the outer side of the end portion of the U-shaped tube;

[0014] A socket is combined with the plug and sleeved on the outer side of the end of the U-shaped tube;

[0015] The socket and the plug are connected by bolts and nuts, and the other end of the socket is fixed to the joint seat. A first seal is provided between the socket, the joint seat and the end of the U-shaped tube, and a second seal is provided between the socket, the plug and the outer wall of the U-shaped tube.

[0016] Specifically, the notch top plate and the top plate are arranged in parallel and connected together through a connecting rod to maintain fixation with the support plate.

[0017] Specifically, a plurality of slots are formed on the slot top plate, and the slots correspond to the gaps between the first limiting plate and / or the second limiting plate.

[0018] Specifically, the slot top plate is a telescopic plate structure, which includes an outer plate and an inner plate. A joint assembly is provided on each of the outer plate and the inner plate. There are two connecting rods in total, wherein any one end of the two connecting rods passes through the outer plate and the inner plate of the slot top plate, and the other end passes through the strip hole of the top plate. The opening direction of the strip hole of the top plate is adapted to the telescopic direction of the telescopic plate.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The test fixture uses a limiting component set on the support plate to facilitate preliminary positioning after the U-shaped tube is placed. Subsequently, the U-shaped tube can be pressed and fixed by the pressure plate and the joint assembly, thereby achieving the fixation of the U-shaped tube. In addition, the fluid channel opened on the joint assembly facilitates the combination with the end of the U-shaped tube while also achieving sealing, making it convenient to carry out pressure tests to detect the sealing performance and pressure tolerance value of the U-shaped tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the specific embodiments of the present invention, they are used to explain the present invention but do not constitute any limitation to the present invention. In the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the present invention (where the part where the connector assembly is located is a cross-sectional structure);

[0023] Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0024] Figure 3 This is a schematic diagram of another structure of the notch top plate in the present invention;

[0025] In the figure: 1. Notch top plate; 2. Pressing member; 3. Support plate; 4. Joint seat; 5. First sealing member; 6. Second sealing member; 7. Socket member; 8. Plug-in member; 9. First limiting plate; 10. Second limiting plate; 11. U-shaped tube; 12. Pressing plate; 13. Positioning member; 14. Fastener; 15. Top plate; 16. Connecting rod. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be further described in detail below through specific embodiments and in combination with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention in any way. The accompanying drawings in the present invention are only used to assist in the description of the embodiments and to facilitate understanding and are not intended to limit the present invention in any way.

[0027] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0028] As described in the background technology, conventional clamping devices are not convenient for clamping and fixing U-shaped pipe fittings, and are not convenient for sealing connection with external testing devices after clamping, and are therefore not convenient for pressure testing. Therefore, it is impossible to detect the sealing performance and pressure tolerance value of the U-shaped tube.

[0029] For the reasons mentioned above, please refer to the attached Figure 1 ~Attached Figure 3 The utility model provides a low-pressure U-shaped tube pressure test tool, comprising a support plate 3, on which a U-shaped tube 11 is placed and limited by a limiting component;

[0030] A joint assembly is combined with the end of the U-shaped tube 11 to achieve sealing and fixation;

[0031] The pressing plate 12 is movably arranged above the supporting plate 3 to press and fix the U-shaped tube 11;

[0032] A fluid channel is provided on the joint assembly, and any end of the fluid channel is combined with the end of the U-shaped tube 11 to achieve sealing.

[0033] In order to achieve the initial positioning of the U-shaped tube and facilitate clamping and fixing, a feasible technical solution is provided herein. Specifically, the limiting assembly includes several first limiting plates 9 and second limiting plates 10 and a top plate 15 arranged in parallel above the support plate 3. The U-shaped tube 11 is placed between the gaps of the several first limiting plates 9 and / or second limiting plates 10. The top plate 15 is arranged on the top end of the support plate 3 and limits the arc end of the U-shaped tube 11. The joint assembly is arranged on the end of the support plate 3 away from the top plate 15.

[0034] In order to press the U-shaped tube and prevent it from moving upward, a feasible solution is provided herein. Specifically, the pressure plate 12 passes through the top of the second limit plate 10 and keeps sliding up and down. A positioning member 13 is provided on the support plate 3 and passes through the pressure plate 12. A fastener 14 is threadedly connected to the positioning member 13. The pressure plate 12 is pressed against the U-shaped tube 11 by screwing the fastener 14.

[0035] Furthermore, a slot hole is provided on the pressing plate, which passes through the top of the second limiting plate and matches each other. The pressing plate can slide up and down by passing the slot hole of the pressing plate through the top of the second limiting plate.

[0036] In order to facilitate pressing the U-shaped tube against the top plate to prevent it from moving at will, specifically, the contact surface between the top plate 15 and the U-shaped tube 11 is an arc-shaped surface, and the arc-shaped surface is adapted to the concave arc of the U-shaped tube 11.

[0037] Please refer to the attached Figure 1 and attached Figure 2 Specifically, the joint assembly includes a joint seat 4, which is provided with a fluid channel and is combined with the end of the U-shaped tube 11;

[0038] The pressing piece 2 is threadedly connected to the slot top plate 1 and the pressing end of the pressing piece 2 is kept in contact with the joint seat 4 to press the joint seat 4 onto the end of the U-shaped tube 11;

[0039] Furthermore, the fluid channels of the connector seat 4 may be channel openings that are vertically connected to each other, one of the channels being combined with the end of the U-shaped tube 11, and the clamping end of the clamping member 2 being arranged on the end of the connector seat 4 away from the U-shaped tube 11, thereby firmly clamping the connector seat 4 on the end of the U-shaped tube 11.

[0040] The plug-in unit 8 is sleeved on the outer side of the end of the U-shaped tube 11;

[0041] The socket 7 is combined with the plug 8 and is sleeved on the outer side of the end of the U-shaped tube 11;

[0042] The socket 7 and the plug 8 are connected by bolts and nuts, and the other end of the socket 7 is fixed to the joint seat 4. A first sealing member 5 is provided between the socket 7, the joint seat 4 and the end of the U-shaped tube 11, and a second sealing member 6 is provided between the socket 7, the plug 8 and the outer wall of the U-shaped tube 11.

[0043] Furthermore, the first sealing member 5 can be configured as an O-ring, and the second sealing ring 6 can be a special-shaped sealing ring, and sealing can be achieved by extrusion.

[0044] Specifically, the notch top plate 1 and the top plate 15 are arranged in parallel and connected together through a connecting rod 16 to maintain fixation with the support plate 3.

[0045] In order to achieve the clamping and fixing of U-shaped tubes of different sizes and to achieve a sealed connection through the joint assembly, a feasible solution is provided here. Please refer to the attached Figure 1 and attached Figure 2 Specifically, a plurality of slots are provided on the slot top plate 1, and the slots correspond to the gaps between the first limiting plate 9 and / or the second limiting plate 10, and the pressing member 2 is threadedly connected in the slots.

[0046] This method has high requirements on the dimensional accuracy of the U-shaped tube, and it is necessary to ensure that the two straight tubes of the U-shaped tube correspond to any two notches of the notch top plate 1.

[0047] In order to achieve the clamping and fixing of U-shaped tubes of different sizes and to achieve a sealed connection through the joint assembly, a feasible solution is provided here. Please refer to the attached Figure 3 Specifically, the slot top plate 1 is a telescopic plate structure, which includes an outer plate and an inner plate. A joint assembly is provided on each of the outer plate and the inner plate. There are two connecting rods 16, wherein any one end of the two connecting rods 16 passes through the outer plate and the inner plate of the slot top plate 1, and the other end passes through the strip hole of the top plate 15. The opening direction of the strip hole of the top plate 15 is adapted to the telescopic direction of the telescopic plate.

[0048] In this way, the distance between the two interface components can be adjusted arbitrarily according to the size of the U-shaped tube, thereby facilitating the clamping of the U-shaped tube while achieving a sealed connection.

[0049] When the tool is in use, first remove the fastener 14 (shown as a nut in the figure) and the pressure plate 12, place the U-shaped tube 11 on the support plate 3, keep the arc-shaped end in contact with the arc surface of the top plate 15, and perform preliminary positioning through the first limiting plate 9 and / or the second limiting plate 10, then pass the pressure plate 12 through the top of the second limiting plate 10 and the positioning member 13, and after contacting the U-shaped tube 11, screw it into the positioning member 13 through the fastener 14 for preliminary compression, and then put the plug-in 8 on the outer end of the U-shaped tube 11 near the end, and then The second sealing member 6 is sleeved on the outer end of the U-shaped tube 11 and contacts the plug-in 8. Finally, the first sealing member 5 is sleeved on the end of the U-shaped tube 11, and the channel opening of the joint seat 4 is combined with the end of the U-shaped tube 11. Then, the pressing member 2 (shown in the figure as a T-shaped threaded wrench) is rotated to push the joint seat 4 to press the first sealing member 5 on the end of the U-shaped tube 11 to achieve sealing, and the plug-in 8 and the socket 7 are connected by bolts and nuts to achieve the sealing of the second sealing member 6. Then, the external pressure test equipment is connected to the other channel opening of the joint seat 4, and a pressure test is performed.

[0050] The above description is a detailed description of the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A low-pressure U-shaped tube pressure test tool, characterized by: include A support plate, on which a U-shaped tube is placed and which is limited by a limiting assembly; A joint assembly is combined with the end of the U-shaped tube to achieve sealing and fixation; The pressing plate is movably arranged above the supporting plate to press and fix the U-shaped tube; A fluid channel is provided on the joint assembly, and any end of the fluid channel is combined with the end of the U-shaped tube to achieve sealing.

2. The low-pressure U-shaped tube pressure test fixture according to claim 1, characterized in that: The limiting assembly includes several first limiting plates, second limiting plates and a top plate arranged in parallel above the support plate. The U-shaped tube is placed between the gaps between the several first limiting plates and / or second limiting plates. The top plate is arranged on one end of the top of the support plate and limits the arc end of the U-shaped tube. The joint assembly is arranged on one end of the support plate away from the top plate.

3. The low-pressure U-shaped tube pressure testing tool according to claim 2, characterized in that: The pressing plate passes through the top of the second limiting plate and keeps sliding up and down. A positioning piece that passes through the pressing plate is provided on the support plate. A fastener is threadedly connected to the positioning piece. The pressing plate is pressed against the U-shaped tube by screwing the fastener.

4. The low-pressure U-shaped tube pressure testing tool according to claim 2, characterized in that: The contact surface between the top plate and the U-shaped tube is an arc-shaped surface.

5. The low-pressure U-shaped tube pressure testing tool according to claim 2, characterized in that: The joint assembly includes a joint seat, which is provided with a fluid channel and is connected to the end of the U-shaped tube; A pressing piece is threadedly connected to the top plate of the notch and keeps the pressing end of the pressing piece in contact with the joint seat to press the joint seat onto the end of the U-shaped tube; A plug-in unit is sleeved on the outer side of the end portion of the U-shaped tube; A socket is combined with the plug and sleeved on the outer side of the end of the U-shaped tube; The socket and the plug are connected by bolts and nuts, and the other end of the socket is fixed to the joint seat. A first seal is provided between the socket, the joint seat and the end of the U-shaped tube, and a second seal is provided between the socket, the plug and the outer wall of the U-shaped tube.

6. The low-pressure U-shaped tube pressure testing tool according to claim 5, characterized in that: The notch top plate and the top plate are arranged in parallel and connected together through a connecting rod to keep them fixed to the support plate.

7. The low-pressure U-shaped tube pressure testing tool according to claim 6, characterized in that: The slot top plate is provided with a plurality of slots, and the slots correspond to the gaps between the first limiting plate and / or the second limiting plate.

8. The low-pressure U-shaped tube pressure testing tool according to claim 6, characterized in that: The slot top plate is a telescopic plate structure, which includes an outer plate and an inner plate. A joint assembly is provided on each of the outer plate and the inner plate. There are two connecting rods in total, wherein any one end of the two connecting rods passes through the outer plate and the inner plate of the slot top plate, and the other end passes through the strip hole of the top plate. The opening direction of the strip hole of the top plate is adapted to the telescopic direction of the telescopic plate.

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