A quick pressure testing device for U-shaped tubes
By designing a rapid pressure testing device for U-shaped tubes, which uses inserts and top blocks to clamp the U-shaped tubes and combines high-pressure gas detection, the problem of rapid crack detection of U-shaped tubes before assembly is solved, achieving efficient and safe airtightness testing.
Patent Information
- Application Number
- CN202422854365.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-22
AI Technical Summary
In existing technologies, it is difficult to quickly and effectively detect whether there are cracks on the surface of U-tubes before assembly, which leads to potential leakage risks.
A rapid pressure testing device for a U-tube was designed, including a tube insert, a top block, an adjustment mechanism, and an air intake system. The U-tube is clamped by the tube insert and the top block, and the sealing performance of the U-tube is tested using high-pressure gas.
It enables rapid and safe testing of the airtightness of U-tubes, improves testing efficiency and reliability, and prevents the U-tubes from detaching during the testing process.
Smart Images
Figure CN223611035U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the field of pipe pressure testing equipment, and particularly relates to a U-shaped pipe rapid pressure testing device. BACKGROUND
[0002] U-shaped pipes are important components in heat exchangers, especially in shell-and-tube heat exchangers. They can effectively transfer heat while having high pressure resistance and corrosion resistance, and are suitable for various heat exchange scenarios such as water-water and steam-water. A single heat exchanger contains several U-shaped pipes connected through assembly. Due to the dense arrangement of U-shaped pipes inside the heat exchanger, it is troublesome to replace them later.
[0003] U-shaped pipes are basically formed by bending, and cracks may occur during bending. Leaks may occur during use, so it is necessary to detect the sealing performance of U-shaped pipes before assembly to ensure that U-shaped pipes for heat exchangers do not leak. CONTENT OF THE UTILITY MODEL
[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a U-shaped pipe rapid pressure testing device. The present application can detect U-shaped pipes before assembly of the heat exchanger to detect whether there are cracks on the surface and ensure the reliability of the U-shaped pipes.
[0005] The technical solution adopted by the present application to solve the existing problems is:
[0006] A U-shaped pipe rapid pressure testing device, comprising two insertion pipes and an air inlet main pipe, the air inlet main pipe is connected with the insertion pipes through air inlet branch pipes, and the air inlet branch pipes are made of flexible pipes.
[0007] Preferably, top blocks are arranged between the insertion pipes, the end face of the top block facing the insertion pipe is concave with an arc-shaped groove, and the insertion pipe and the top block are connected through a distance adjusting mechanism.
[0008] Preferably, at least three top blocks are arranged at intervals, a first screw rod is rotatably connected to one end of the top block away from the insertion pipe, and a vertical plate is arranged at intervals at one end of the top block away from the insertion pipe, and the first screw rod is threadedly connected with the vertical plate.
[0009] Preferably, a sleeve is fixed to the end face of the inner side of the two insertion pipes, a telescopic rod is inserted between the two sleeves, the telescopic rod is fixed with a first nut sleeve, and the vertical plate is fixed with a second nut sleeve.
[0010] The distance adjusting mechanism is a second screw rod, and the second screw rod is threadedly connected with the first nut sleeve and the second nut sleeve.
[0011] Preferably, an annular abutting surface is protruded on the inner wall of the insertion pipe.
[0012] The end of the air inlet branch pipe is connected with a plug, and the plug is detachably connected with the end of the insertion pipe.
[0013] Compared with the prior art, the application has the beneficial effects:
[0014] (1) It can be quickly connected with the U-shaped pipe, and the efficiency of the U-shaped pipe airtightness detection is improved.
[0015] (2) The U-shaped pipe is clamped in the middle by the insertion pipe and the top block, effectively avoiding the disengagement of the U-shaped pipe, and improving the safety and reliability of the detection. BRIEF DESCRIPTION OF DRAWINGS
[0016] The application will be further described below in combination with the drawings and examples.
[0017] Figure 1 is a structural diagram of a U-shaped pipe rapid pressure testing device of the application,
[0018] Figure 2 is Figure 1 an exploded view,
[0019] Figure 3 is Figure 1 a first sectional view,
[0020] Figure 4 is Figure 1 a second sectional view.
[0021] In the figure: 1-U-shaped pipe, 2-insertion pipe, 201-abutment surface, 202-sleeve, 3-telescopic rod, 301-first nut sleeve, 4-plug, 5-air inlet main pipe, 501-air inlet branch pipe, 6-top block, 7-first screw rod, 8-stand plate, 801-second nut sleeve, 9-second screw rod. DETAILED DESCRIPTION
[0022] Some terms are used in the description and claims to refer to certain components. As one skilled in the art will appreciate, hardware manufacturers can refer to the same component by different names. This description and claims should not be construed to favor one name of a component over another name of the same component. The description and claims should be read to identify the component from the description of its function rather than its name. As used throughout the description and claims, "comprising" is an open term that is intended to mean "including, but not limited to." "Approximately" means within an acceptable error range for the corresponding function, which will be understood by one of ordinary skill in the art.
[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0024] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0025] The drawings are the best embodiment of the U-shaped tube rapid pressure test device, and the present application will be further described in detail below in combination with the drawings.
[0026] As shown in Figures 1 to 4 A U-shaped tube rapid pressure test device, comprising two insertion tubes 2 and an air inlet manifold 5, the air inlet manifold 5 is connected with the insertion tube 2 through an air inlet branch pipe 501, and the air inlet branch pipe 501 is a flexible pipe.
[0027] Two insertion tubes 2 are respectively inserted into two ports of the U-shaped tube 1, after connection, the air inlet manifold 5 injects high-pressure gas into the inside of the U-shaped tube 1 through the air inlet branch pipe 501 and the insertion tube 2, then the U-shaped tube 1 is immersed in water, and whether the U-shaped tube 1 leaks is judged by observing whether bubbles are emitted from the surface of the U-shaped tube 1.
[0028] Since the end of the U-shaped tube 1 is a light pipe, the insertion tube 2 is easy to be separated from the U-shaped tube 1 during pressure maintaining. In order to avoid this phenomenon, the insertion tube 2 is arranged with a top block 6 at intervals, and the U-shaped tube 1 is clamped between the insertion tube 2 and the top block 6.
[0029] The end surface of the top block 6 facing the insertion tube 2 is concave with an arc-shaped groove, the arc of the arc-shaped groove is less than or equal to 180°, and the U-shaped tube 1 is clamped inside the arc-shaped groove.
[0030] The insertion tube 2 and the top block 6 are connected through a distance adjusting mechanism, the distance adjusting mechanism is used to adjust the distance between the insertion tube 2 and the top block 6, which can not only ensure that the U-shaped tube 1 is clamped, but also can adapt to U-shaped tubes 1 of different lengths.
[0031] Since the top block 6 abuts against the U-shaped pipe 1, the leakage point of the U-shaped pipe 1 at the position is easy to be covered and blocked. Therefore, in the embodiment, at least three top blocks 6 are arranged at intervals, the first screw rod 7 is rotatably connected to the end of the top block 6 away from the insertion pipe 2, and the vertical plate 8 is arranged at intervals at the end of the top block 6 away from the insertion pipe 2, and the first screw rod 7 is threadedly connected with the vertical plate 8.
[0032] For example, three top blocks 6 are used, one of which is arranged at the middle position of the bending part of the U-shaped pipe 1, and the other two are symmetrically arranged at the two sides of the middle top block 6, and the top blocks 6 all abut against the bending part of the U-shaped pipe 1.
[0033] After the U-shaped pipe 1 is placed in water and kept pressure, the first screw rod 7 is rotated to move the top block 6 backward, so that the top block 6 is separated from the U-shaped pipe 1, and the other two top blocks 6 clamp the U-shaped pipe 1 together with the insertion pipe 2. Then the middle top block 6 is moved forward to abut against the U-shaped pipe 1, and the other two top blocks 6 are moved backward.
[0034] In order to adapt to U-shaped pipes 1 of different widths, sleeve pipes 202 are fixed on the end faces of the inner sides of the two insertion pipes 2, the telescopic rods 3 are arranged between the two sleeve pipes 202, the first nut sleeves 301 are fixed to the telescopic rods 3, and the vertical plates 8 are fixed with the second nut sleeves 801.
[0035] The distance adjusting mechanism is the second screw rod 9, which is threadedly connected with the first nut sleeve 301 and the second nut sleeve 801.
[0036] The insertion pipe 2 is provided with the annular abutting surface 201 on the inner wall, and the top surface of the port of the U-shaped pipe 1 abuts against the abutting surface 201, so as to improve the sealing effect of the insertion pipe 2 and the clamping force of the insertion pipe 2 and the top block 6 on the U-shaped pipe 1.
[0037] The end of the gas inlet branch pipe 501 is connected with the plug 4, which is detachably connected with the end of the insertion pipe 2, and the plug 4 can be a quick plug and is connected with the insertion pipe 2.
[0038] The above describes the embodiments of the application in detail in combination with the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.
Claims
1. A U-shaped tube rapid pressure testing device, characterized in that: it comprises two insertion tubes (2) and an air inlet manifold (5), the air inlet manifold (5) is connected with the insertion tubes (2) through air inlet branch pipes (501), and the air inlet branch pipes (501) are made of hoses; top blocks (6) are arranged at intervals between the insertion tubes (2), the end faces of the top blocks (6) towards the insertion tubes (2) are concave with arc-shaped grooves, and the insertion tubes (2) and the top blocks (6) are connected through distance adjusting mechanisms; at least three top blocks (6) are arranged at intervals, first screw rods (7) are rotatably connected to the ends of the top blocks (6) away from the insertion tubes (2), vertical plates (8) are arranged at intervals at the ends of the top blocks (6) away from the insertion tubes (2), and the first screw rods (7) are threadedly connected with the vertical plates (8); sleeve pipes (202) are fixed on the end faces of the inner sides of the two insertion tubes (2), an expansion rod (3) is inserted between the two sleeve pipes (202), the expansion rod (3) is fixed with a first nut sleeve (301), and the vertical plates (8) are fixed with second nut sleeves (801); the distance adjusting mechanism is a second screw rod (9), and the second screw rod (9) is threadedly connected with the first nut sleeve (301) and the second nut sleeves (801).
2. The U-shaped tube rapid pressure testing device according to claim 1, characterized in that: the inner walls of the insertion tubes (2) are convex with annular abutting faces (201).
3. The U-shaped tube rapid pressure testing device according to claim 1, characterized in that: the air inlet branch pipes (501) are connected with plugs (4) at the ends, and the plugs (4) are detachably connected with the ends of the insertion tubes (2).