Pressure testing equipment

Abstract

The utility model belongs to the technical field of tube bundle testing equipment, and particularly relates to pressure testing equipment. The pressure test equipment comprises a tube bundle, the tube bundle comprises a mounting seat and a tube fitting, and at least one end of the tube fitting is fixed on the mounting seat; a cavity is formed in the cylinder body, the cavity extends out of one end of the cylinder body along the axis of the cylinder body, at least one connector is arranged on the cylinder body, and a pressurizing medium is input into or output from the cavity through the connector; the connecting mechanism is used for connecting and fixing the mounting seat and the cylinder body; the sealing mechanism, the sealing mechanism, the cavity and the mounting seat form a closed test space, and pressure is applied to the outer wall of the pipe fitting through a pressurizing medium in the test space during testing. By adopting the scheme, the pressurizing medium applies pressure to the pipe bundle from the outer wall and does not need to enter the pipe fitting, so that after the test is completed, the pressurizing medium in the pipe fitting does not need to be cleaned, the technological process is saved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of tube bundle testing equipment, and in particular relates to a pressure testing device. Background Technology

[0002] Tube bundles are the core components of heat exchangers in pressure vessels, primarily responsible for heat transfer. During use, tube bundles frequently endure complex environments such as high pressure and high temperature. If the tube bundle cannot withstand the pressure, a tube rupture accident will occur, causing equipment damage and personal injury. To ensure the safety and reliability of the tube bundles, pressure testing is required.

[0003] Pressure testing typically employs a hydrostatic test method, filling the pipes with water and pressurizing them to a set pressure. The pipes are then observed for leaks or deformation to determine their reliability. However, this method requires extensive cleaning of the water inside the pipes after the pressure test, a process that is both time-consuming and challenging. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a pressure testing device that pressurizes the tube bundle from the outside of the tube fitting, the pressurizing medium does not enter the tube fitting, and there is no need to clean the pressurizing medium inside the tube bundle after the test is completed.

[0005] The technical solution proposed by this utility model is as follows:

[0006] A pressure testing device, comprising:

[0007] The tubing bundle includes a mounting base and a fitting, with at least one end of the fitting fixed to the mounting base;

[0008] Also includes:

[0009] A cylindrical body with a cavity inside, the cavity extending out of one end of the cylindrical body along the axis of the cylindrical body, and at least one interface on the cylindrical body, through which the pressurizing medium is input into or output from the cavity.

[0010] The connecting mechanism is used to connect the fixed mounting base and the cylinder.

[0011] The sealing mechanism, cavity, and mounting base form a sealed test space, through which the pressurized medium within the test space applies pressure to the outer wall of the pipe fitting.

[0012] Optionally, both ends of the pipe fitting are connected to the mounting base, and the end of the pipe fitting passes through the mounting base. The sealing mechanism includes a first sealing element, which is used to seal the gap between the mounting base and the cylinder.

[0013] Optionally, a through hole is provided at the end of the cylinder away from the mounting base, and a cover can be detachably connected to the through hole.

[0014] Optionally, the tube bundle may also include:

[0015] The pipe fitting has two ends mounted on a fixed base and a mounting base, respectively.

[0016] The sealing mechanism includes a first sealing assembly and a second sealing assembly. The first sealing assembly includes a second sealing element, which is used to seal the gap between the mounting base and the cylinder. The second sealing assembly is used to seal the port of the pipe located on the fixed base.

[0017] Optionally, the second sealing assembly includes:

[0018] A plugging component, which can be detachably connected to the port of the pipe fitting.

[0019] Optionally, the second sealing assembly includes:

[0020] A retaining ring is placed inside the cavity;

[0021] The third seal is used to seal the gap between the retaining ring and the fixed seat.

[0022] Optionally, the retaining ring is integrally formed with the cylinder body.

[0023] Optionally, the retaining ring can reciprocate within the cavity;

[0024] The second sealing assembly also includes a fourth seal, which is used to seal the gap between the retaining ring and the inner cavity.

[0025] Optionally, a connecting hole is provided at the end of the cylinder away from the mounting base, the connecting hole is in communication with the cavity, the retaining ring is slidably connected in the cavity, a first mounting ring is provided at the end of the retaining ring extending out of the connecting hole, a second mounting ring is provided on the outer wall of the cylinder, and the first mounting ring and the second mounting ring are bolted together.

[0026] Optionally, the connection mechanism includes:

[0027] The first connecting ring is located at the open end of the cylinder;

[0028] The second connecting ring is bolted to the first connecting ring, and the mounting base is clamped between the first connecting ring and the second connecting ring.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] This invention features a cylindrical body with one open end, allowing for the detachable installation of tube bundles via a connecting mechanism. A sealing mechanism then creates a closed test space within the cavity. Pressurized medium is introduced into this test space through an interface on the cylindrical body to pressurize the tube bundle. This design applies pressure to the tube bundle from the outer wall, eliminating the need for the medium to enter the tubes. Therefore, after testing, there is no need to clean the pressurized medium from the tubes, saving time and improving efficiency. Attached Figure Description

[0031] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0032] Figure 1 This is a perspective view of the present utility model;

[0033] Figure 2 This utility model Figure 1 Cross-sectional view;

[0034] Figure 3 This utility model Figure 2 Enlarged view of area A;

[0035] Figure 4 This utility model Figure 2 Enlarged view of area B;

[0036] Figure 5 This is a perspective view of the tube bundle in Embodiment 3 of this utility model;

[0037] Figure 6 This is a perspective view of the second connecting ring of this utility model;

[0038] Figure 7 This is a perspective view of the retaining ring with a first connecting ring in this utility model;

[0039] Figure 8 This utility model Figure 7 Installation diagram;

[0040] Figure 9 This is a schematic diagram of the installation of the retaining ring and the cylinder body of this utility model, which are integrally formed.

[0041] Figure 10 This is a schematic diagram of the installation of the retaining ring and the hollow threaded connection of this utility model;

[0042] Figure 11 This is an installation diagram of Embodiment 2 of the present invention;

[0043] Figure 12 This utility model Figure 11 Enlarged view of area C;

[0044] Figure 13 This utility model Figure 11 Enlarged view of area D;

[0045] Figure 14 This is a schematic diagram of the shroud and the cylinder integrally formed in Embodiment 2 of this utility model.

[0046] In the diagram: 1. Cylinder; 11. Cavity; 12. Interface; 13. Pressure measuring element; 14. Through hole; 15. Connection hole; 16. Cover;

[0047] 2. Pipe bundle; 21. Mounting base; 22. Pipe fitting; 23. Fixing base;

[0048] 3. Connecting mechanism; 31. First connecting ring; 32. Second connecting ring;

[0049] 4. Sealing mechanism; 41. First seal; 42. First sealing assembly; 421. Second seal; 43. Second sealing assembly; 431. Snap ring; 432. Third seal; 433. Fourth seal; 434. First mounting ring; 435. Second mounting ring. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Example 1

[0053] Please refer to Figure 1-14This utility model provides a pressure testing device, which has a cylinder 1 with a cavity 11 inside the cylinder 1. The cavity 11 extends out of one end of the cylinder 1, and the tube bundle 2 to be tested is inserted into the cavity 11 along the open end of the cylinder 1. An interface 12 and a pressure measuring element 13 are provided on the outer wall of the cylinder 1. The pressurized medium is input into the cavity 11 through the interface 12 to realize the pressure resistance test of the tube bundle 2, and the pressure measuring element 13 is used to monitor the pressure inside the cavity 11.

[0054] Those skilled in the art will understand that the pressurizing medium can be gas or liquid, preferably pure water or air, and in this solution, pure water is preferred as the pressurizing medium.

[0055] As will be understood by those skilled in the art, the number of interfaces 12 can be one or more.

[0056] Those skilled in the art will understand that the pressure sensing element 13 can be a pressure gauge or a pressure sensor.

[0057] In this embodiment, the tube bundle 2 has a mounting base 21, on which at least one tube 22 is provided. Before the test, the tube 22 is inserted into the cavity 11 through the open end of the cylinder 1, and the mounting base 21 is connected and fixed to the cylinder 1 through the connecting mechanism 3. At this time, the sealing mechanism 4, the inner wall of the cavity 11 and the mounting base 21 form a closed test space.

[0058] In this embodiment, the connecting mechanism 3 includes a first connecting ring 31 and a second connecting ring 32. The first connecting ring 31 is fixedly disposed at the open end of the cylinder 1, and the second connecting ring 32 is an annular plate. The mounting base 21 is clamped between the first connecting ring 31 and the second connecting ring 32. The first connecting ring 31 and the second connecting ring 32 are bolted together (the first connecting ring 31 and the second connecting ring 32 are flanged together). During clamping, the end of the tube bundle 2 is located in the middle of the second connecting ring 32 to avoid damage to the tube bundle 2 by the second connecting ring 32 during the clamping process.

[0059] Those skilled in the art will understand that the outer diameter of the mounting base 21 is larger than the diameter of the cavity 11, and the outer diameter of the mounting base 21 is smaller than the outer diameter of the first connecting ring 31 and the second connecting ring 32.

[0060] Those skilled in the art will understand that the mounting base 21 can also be bolted to the first connecting ring 31 (but this method requires opening a through hole in the mounting base 21 for the screw to pass through, which on the one hand increases the size of the mounting base 21, and on the other hand will affect the rigidity and sealing of the mounting base 21).

[0061] Those skilled in the art will understand that the connecting mechanism 3 can also be implemented in other ways, such as setting a snap fastener to connect the first connecting ring 31 and the second connecting ring 32; or a threaded connection can be used to connect the mounting base 21 and the cylinder 1 (a boss is provided on the mounting base 21, an external thread is provided on the outer wall of the boss, an internal thread is provided in the cavity 11, and the boss and the cavity 11 are connected by the thread).

[0062] The working principle of this embodiment is as follows: The pipe fitting 22 is inserted into the cavity 11, and then the first connecting ring 31 and the second connecting ring 32 are fixed by bolts. At this time, the mounting base 21 is clamped and fixed by the first connecting ring 31 and the second connecting ring 32, and the sealing mechanism 4 seals the parts that may leak. Further, after the assembly is completed, pure water is injected into the cylinder 1 through the interface 12 to conduct a pressure resistance test (during the test, the pressure of the pure water acts on the pipe fitting 22 from the outside to check the sealing and pressure resistance of the pipe fitting 22 and ensure that the pipe fitting 22 can withstand the set pressure during normal use). After the test is completed, the first connecting ring 31 and the second connecting ring 32 are separated and the tube bundle 2 is taken out.

[0063] It should be noted that the shape of the pipe fitting 22 is not limited in this solution; it is sufficient to fix both ends of the pipe fitting 22 to the mounting base 21.

[0064] It should be noted that during the pressure test, the open end of the cylinder 1 is set to a vertically downward position. When the pipe fitting 22 leaks, the pressurized medium can be discharged from the mounting base 21 side. This can prevent the pressurized medium from remaining in the cylinder 1 and also make it easier for the test personnel to observe the leakage.

[0065] Example 2

[0066] refer to Figure 11-14 In this embodiment, both ends of the pipe fitting 22 are fixed on the mounting base 21 and extend out of the mounting base 21 away from the cylinder 1.

[0067] In this embodiment, the sealing mechanism 4 adopts a first sealing element 41, which seals the gap between the mounting base 21 and the cylinder 1. Specifically, the first sealing element 41 is a sealing ring, which is placed between the first connecting ring 31 and the mounting base 21. After the first connecting ring 31 and the second connecting ring 32 are fixed by bolts, the mounting base 21 and the first connecting ring 31 squeeze the sealing ring, so that the sealing ring seals the gap between the first connecting ring 31 and the mounting base 21.

[0068] As a preferred embodiment, a through hole 14 is provided on the side of the cylinder 1 away from the opening end. The through hole 14 is connected to the cavity 11 of the cylinder 1. A cover 16 is detachably connected to the through hole 14. The cover 16 is a hollow structure with one end open, and its opening corresponds to the through hole 14. By replacing the cover 16 of different lengths, different lengths of pipe fittings 22 can be used, and the cavity 11 of the cylinder 1 can be cleaned more conveniently.

[0069] Those skilled in the art will understand that the connection between the cover 16 and the cylinder 1 can be achieved by bolting (flanges are provided on the cover 16 and the cylinder 1 respectively, and a pair of flanges are bolted together), threaded connection (external threads are provided on the cover 16 and internal threads are provided on the through hole 14, and the cover 16 is fixedly connected to the through hole 14 by the threads), snap fastener connection, etc.

[0070] Those skilled in the art will understand that when a detachable cover 16 is provided, the first sealing element 41 in this embodiment can also be provided between the cover 16 and the cylinder 1.

[0071] Example 3

[0072] refer to Figure 1-10 In this embodiment, the tube bundle 2 also includes a fixing seat 23, and the two ends of the tube 22 pass through the fixing seat 23 and the mounting seat 21 respectively.

[0073] In this embodiment, the sealing mechanism 4 includes a first sealing component 42 and a second sealing component 43. The first sealing component 42 is used to seal the gap between the mounting base 21 and the cylinder 1, and the second sealing component 43 is used to seal the port of the pipe 22 located on the fixed base 23.

[0074] Specifically, the first sealing assembly 42 adopts a second sealing element 421, which can be a sealing ring. The sealing ring is placed between the first connecting ring 31 and the mounting base 21. After the first connecting ring 31 and the second connecting ring 32 are fixed by bolts, the mounting base 21 and the first connecting ring 31 squeeze the sealing ring, so that the sealing ring seals the gap between the first connecting ring 31 and the mounting base 21.

[0075] The first option for the second sealing assembly 43 is to use a plug (not shown in the figure, the plug uses existing technology, such as plugs, rubber plugs, dust covers, etc.) to seal the port of the pipe 22 located on the side of the fixed seat 23, so as to prevent leakage of pressurized medium.

[0076] The second option for the second sealing assembly 43 is to use a retaining ring 431. The retaining ring 431 is set in the cavity 11. A third sealing element 432 is provided between the retaining ring 431 and the fixed seat 23. The third sealing element 432 can be a sealing ring. When the tube bundle 2 and the cylinder 1 are in the assembled state, the fixed seat 23 and the retaining ring 431 squeeze the sealing ring to seal the gap between the retaining ring 431 and the fixed seat 23.

[0077] As a preferred embodiment, the retaining ring 431 can move along the axial direction of the cylinder 1, thereby enabling it to accommodate pipe fittings 22 of different lengths.

[0078] Those skilled in the art will understand that a fourth seal 433 is provided between the retaining ring 431 and the cavity 11. The fourth seal 433 is a sealing ring to prevent leakage of the pressurized medium.

[0079] As a preferred embodiment, a connecting hole 15 is provided on the side of the cylinder 1 away from the opening end, and the connecting hole 15 communicates with the cavity 11 of the cylinder 1.

[0080] As a further preferred embodiment, the retaining ring 431 is threadedly connected to the inner wall of the cavity 11, and the position of the retaining ring 431 within the cavity 11 can be adjusted by rotating the retaining ring 431. In this embodiment, it is even more preferable to set the diameter of the connecting hole 15 to be smaller than the inner diameter of the cavity 11 and larger than the diameter of the inner hole of the retaining ring 431. On the one hand, this can restrict the retaining ring 431 from moving out of the cylinder 1 along the connecting hole 15, and on the other hand, it can also facilitate the adjustment of the position of the retaining ring 431.

[0081] Those skilled in the art will understand that the inner hole of the retaining ring 431 is preferably hexagonal. By engaging a hexagonal wrench with the inner hole of the retaining ring 431, the retaining ring 431 can be rotated (obviously, the inner hole of the retaining ring 431 can also be other shapes, such as quadrilateral, triangle, pentagon, ellipse, etc., but a tool of the corresponding shape is required to rotate the retaining ring 431).

[0082] As a further preferred embodiment, the retaining ring 431 is slidably connected in the cavity 11 of the cylinder 1. One end of the retaining ring 431 extending out of the connection hole 15 is provided with an outwardly turned first mounting ring 434, and the end of the cylinder 1 away from the first connecting ring 31 is provided with a second mounting ring 435. The first mounting ring 434 and the second mounting ring 435 are bolted together by multiple screws (the first mounting ring 434 and the second mounting ring 435 are flange-connected). By adjusting the distance between the first mounting ring 434 and the second mounting ring 435, the insertion depth of the retaining ring 431 into the cavity 11 can be adjusted, thereby accommodating pipe fittings 22 of different lengths.

[0083] It should be noted that the shape of the fitting 22 is not limited in this solution. The axis of the fitting 22 can be a straight line or a spiral, etc.

[0084] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure testing device, comprising: The tube bundle (2) includes a mounting base (21) and a fitting (22), at least one end of the fitting (22) being fixed to the mounting base (21); Its characteristic is that it further includes: The cylinder (1) has a cavity (11) inside it. The cavity (11) extends out of one end of the cylinder (1) along the axis of the cylinder (1). The cylinder (1) has at least one interface (12) on it. The pressurized medium is input into or output from the cavity (11) through the interface (12). The connecting mechanism (3) is used to connect the fixed mounting base (21) and the cylinder (1); The sealing mechanism (4), the cavity (11) and the mounting base (21) form a closed test space. During the test, the pressurizing medium in the test space applies pressure to the outer wall of the pipe fitting (22).

2. The pressure testing equipment according to claim 1, characterized in that, Both ends of the pipe fitting (22) are connected to the mounting base (21), and the end of the pipe fitting (22) passes through the mounting base (21). The sealing mechanism (4) includes a first sealing element (41), which is used to seal the gap between the mounting base (21) and the cylinder (1).

3. The pressure testing equipment according to claim 2, characterized in that, A through hole (14) is provided at the end of the cylinder (1) away from the mounting base (21), and a cover (16) is detachably connected to the through hole (14).

4. The pressure testing equipment according to claim 1, characterized in that, The tube bundle (2) also includes: The fixed base (23) and the two ends of the pipe fitting (22) are respectively set on the fixed base (23) and the mounting base (21); The sealing mechanism (4) includes a first sealing assembly (42) and a second sealing assembly (43). The first sealing assembly (42) includes a second seal (421) for sealing the gap between the mounting base (21) and the cylinder (1). The second sealing assembly (43) is used to seal the port of the pipe fitting (22) located on the fixed base (23).

5. The pressure testing device according to claim 4, characterized in that, The second sealing assembly (43) includes: A plugging component is detachably connected to the port of the pipe fitting (22).

6. The pressure testing device according to claim 4, characterized in that, The second sealing assembly (43) includes: A retaining ring (431) is disposed in the cavity (11); The third seal (432) is used to seal the gap between the retaining ring (431) and the fixed seat (23).

7. The pressure testing device according to claim 6, characterized in that, The retaining ring (431) is integrally formed with the cylinder (1).

8. The pressure testing device according to claim 6, characterized in that, The retaining ring (431) can reciprocate within the cavity; The second sealing assembly (43) also includes a fourth seal (433) for sealing the gap between the retaining ring (431) and the inner cavity.

9. The pressure testing device according to claim 8, characterized in that, A connecting hole (15) is provided at one end of the cylinder (1) away from the mounting base (21). The connecting hole (15) communicates with the cavity (11). The retaining ring (431) is slidably connected in the cavity (11). A first mounting ring (434) is provided at one end of the retaining ring (431) extending out of the connecting hole (15). A second mounting ring (435) is provided on the outer wall of the cylinder (1). The first mounting ring (434) and the second mounting ring (435) are bolted together.

10. The pressure testing device according to claim 1, characterized in that, The connecting mechanism (3) includes: The first connecting ring (31) is set at the open end of the cylinder (1); The second connecting ring (32) is bolted to the first connecting ring (31), and the mounting base (21) is clamped between the first connecting ring (31) and the second connecting ring (32).

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