Quick-change connector for pipeline pressure test

Abstract

The quick-change connector comprises a pipe to be tested and a water pipe, matching threads are arranged on the outer side wall of the water pipe and close to the upper side, the water pipe is in threaded connection with a lower pressing block through the matching threads, an upper baffle is arranged on the outer side wall of the water pipe and located on the right lower side of the matching threads, and the lower pressing block is in threaded connection with the upper baffle. A rotating sleeve is slidably connected to the outer side wall of the water passing pipe and located under the upper baffle, and a protective sleeve is slidably connected to the outer side wall of the rotating sleeve. The lower end of the water pipe extends into the to-be-tested pipe, and an upper plug, an upper cone, a lower cone, a lower plug, a lower baffle and two nuts are sequentially arranged on the part, in the to-be-tested pipe, of the water pipe from top to bottom. According to the utility model, the outer side wall of the to-be-tested pipe can be protected through the arrangement of the protective sleeve and the protective pad, so that the to-be-tested pipe can be effectively prevented from being deformed due to internal pressure, and the use effect of the device is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline testing, in particular to a quick-change joint for pipeline pressure testing. Background Art

[0002] Boilers, blast furnaces, and other water-cooled walls utilize a large number of pipes and operate at high pressures. Once a leak is discovered after installation and operation, it can be very troublesome to address. Therefore, a pressure test must be performed on each pipe before installation to detect leaks early and ensure installation quality. This pressure test involves connecting the pipe to be tested to form a loop. Water is then passed through the pipe as required, and the pipe is observed to detect leaks within a certain pressure range.

[0003] Chinese patent CN205978968U proposes a quick-change pipe pressure test connector that significantly improves the efficiency of pipe pressure testing without damaging the pipe being inspected. However, during the pressure test, one end of the pipe being tested could be easily deformed by the internal pressure, affecting the pipe's normal operation. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a quick-change connector for pipeline pressure testing. The device is provided with a protective sleeve and a protective pad. The provision of the protective sleeve and the protective pad can protect the outer wall of the test pipe, effectively preventing the test pipe from being deformed by internal pressure, and effectively improving the use effect of the device.

[0005] The device is provided with a lower pressure block and a rotating rod. The lower pressure block is set in a bowl shape, which can withstand more pressure applied by the outside world without deformation, thereby effectively improving the service life of the device. The setting of the rotating rod makes the rotation of the lower pressure block more labor-saving and improves the convenience of operation.

[0006] The utility model also provides a quick-change connector for pipeline pressure testing, comprising: a pipe to be tested and a water pipe, wherein the outer wall of the water pipe is provided with a matching thread near the upper side, the water pipe is threadedly connected to a lower pressing block through the matching thread, an upper baffle is provided on the outer wall of the water pipe and located directly below the matching thread, a rotating sleeve is slidably connected to the outer wall of the water pipe and located directly below the upper baffle, and a protective sleeve is slidably connected to the outer wall of the rotating sleeve;

[0007] The lower end of the water pipe extends into the interior of the test pipe. The water pipe is provided with an upper plug, an upper cone, a lower cone, a lower plug, a lower baffle and two nuts from top to bottom inside the test pipe.

[0008] According to the quick-change connector for pipeline pressure testing, a protective pad is fixedly connected to the inner wall of the protective sleeve, and a frustum groove is provided on the inner wall of the protective pad, which is convenient for wrapping pipes to be tested of different sizes, thereby preventing the pipes to be tested from being protected.

[0009] According to the quick-change connector for pipeline pressure testing, the lower pressure block is arranged in a bowl shape, and three rotating rods are installed on the outer side wall of the lower pressure block. The outer end of each rotating rod is fixedly connected to a rotating cap, and the lower pressure block can be driven to rotate by the rotating rod.

[0010] According to the quick-change connector for pipeline pressure testing, the outer side wall of the water pipe is fixedly connected with an intermediate baffle, and the intermediate baffle cooperates with the upper plug to facilitate the upper plug to block the upper end of the test pipe.

[0011] According to the quick-change joint for pipeline pressure testing, the upper plug and the lower plug are both made of rubber material, and their diameters will increase after being pressed.

[0012] According to the quick-change joint for pipeline pressure testing, a plurality of expansion rods are installed between the lower cone and the upper cone.

[0013] According to the quick-change joint for pipeline pressure testing, the two nuts are both threadedly connected to the water pipe.

[0014] According to the quick-change joint for pipeline pressure testing, the angle between the lower cone and the upper cone is set to 30 degrees to 50 degrees.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a structural schematic diagram of a quick-change joint for pipeline pressure testing according to the utility model;

[0018] Figure 2 This is a front view schematic diagram of a quick-change joint for pipeline pressure testing according to the present utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of a quick-change joint for pipeline pressure testing according to the present utility model;

[0020] Figure 4 The utility model is a top view schematic diagram of a quick-change joint for pipeline pressure testing.

[0021] Legend:

[0022] 1. Test tube; 2. Water pipe; 201. Upper baffle; 202. Mating thread; 203. Middle baffle; 204. Lower baffle; 205. Nut; 3. Lower pressure block; 301. Rotating rod; 302. Rotating cap; 4. Protective sleeve; 401. Rotating sleeve; 402. Protective pad; 5. Upper plug; 501. Upper cone; 6. Expansion rod; 7. Lower plug; 701. Lower cone. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections, indirect connections through an intermediate medium, or internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Reference Figure 1-4 The embodiment of the utility model is a quick-change connector for pipeline pressure testing, which includes: a pipe to be tested 1 and a water pipe 2, the outer wall of the water pipe 2 is provided with a matching thread 202 near the upper side, the water pipe 2 is threadedly connected to a lower pressing block 3 through the matching thread 202, the lower pressing block 3 is arranged in a bowl shape, and three rotating rods 301 are installed on the outer wall of the lower pressing block 3, and the outer end of each rotating rod 301 is fixedly connected to a rotating cap 302, which can drive the lower pressing block 3 to rotate through the rotating rod 301.

[0026] An upper baffle 201 is provided on the outer wall of the water pipe 2 and directly below the mating thread 202. A rotating sleeve 401 is slidably connected to the outer wall of the water pipe 2 and directly below the upper baffle 201. A protective sleeve 4 is slidably connected to the outer wall of the rotating sleeve 401. A protective pad 402 is fixedly connected to the inner wall of the protective sleeve 4. A frustum groove is provided on the inner wall of the protective pad 402, which is convenient for wrapping the test tubes 1 of different sizes, thereby preventing the test tubes 1 from being protected.

[0027] The lower end of the water pipe 2 extends into the interior of the tube to be tested 1. The water pipe 2 is provided with an upper plug 5, an upper cone 501, a lower cone 701, a lower plug 7, a lower baffle 204 and two nuts 205 in the inner portion of the tube to be tested, from top to bottom. The outer wall of the water pipe 2 is fixedly connected to the middle baffle 203. The middle baffle 203 cooperates with the upper plug 5 to facilitate the upper plug 5 to block the upper end of the tube to be tested 1. The upper plug 5 and the lower plug 7 are both made of rubber material, and their diameter will increase when compressed. A number of expansion rods 6 are installed between the lower cone 701 and the upper cone 501. The two nuts 205 are both threadedly connected to the water pipe 2. The angle between the lower cone 701 and the upper cone 501 is set to 30 degrees to 50 degrees.

[0028] Working principle: When conducting pipeline inspection, first, insert the water pipe 2 into the pipe to be tested 1, and make the middle baffle 203 match the upper end of the pipe to be tested 1. Then, slide the protective sleeve 4 downward so that the protective pad 402 protects the outer wall of the pipe to be tested 1. Then, the lower pressing block 3 is driven to rotate by the rotating rod 301. As the tightening force increases, the expansion rods 6 expand outward to press against the inner wall of the pipe to be tested 1. As the tightening force is further increased, the water pipe 2 moves upward, causing the upper and lower blockages to expand radially and fit tightly with the inner wall of the inspected pipe, achieving a double-layer reliable sealing effect and forming a closed test space with high pressure bearing capacity. Finally, water is poured through the water pipe 2 for pressure testing.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A quick-change joint for pipeline pressure testing, characterized in that: include: A pipe to be tested (1) and a water pipe (2), wherein a matching thread (202) is provided on the outer wall of the water pipe (2) near the upper side, the water pipe (2) is threadably connected to a lower pressing block (3) via the matching thread (202), an upper baffle (201) is provided on the outer wall of the water pipe (2) and located directly below the matching thread (202), a rotating sleeve (401) is slidably connected to the outer wall of the water pipe (2) and located directly below the upper baffle (201), and a protective sleeve (4) is slidably connected to the outer wall of the rotating sleeve (401); The lower end of the water pipe (2) extends into the interior of the tube to be tested (1), and the water pipe (2) is provided with an upper plug (5), an upper cone (501), a lower cone (701), a lower plug (7), a lower baffle (204) and two nuts (205) from top to bottom in the interior of the tube to be tested (1).

2. A quick-change joint for pipeline pressure testing according to claim 1, characterized in that: A protective pad (402) is fixedly connected to the inner side wall of the protective sleeve (4), and a frustum groove is provided on the inner side wall of the protective pad (402).

3. A quick-change joint for pipeline pressure testing according to claim 1, characterized in that: The lower pressing block (3) is arranged in a bowl shape, and three rotating rods (301) are installed on the outer side wall of the lower pressing block (3), and the outer end of each rotating rod (301) is fixedly connected to a rotating cap (302).

4. A quick-change joint for pipeline pressure testing according to claim 1, characterized in that: An intermediate baffle (203) is fixedly connected to the outer side wall of the water pipe (2), and the intermediate baffle (203) cooperates with the upper plug (5).

5. The quick-change joint for pipeline pressure testing according to claim 1, characterized in that: The upper plug (5) and the lower plug (7) are both made of rubber material.

6. A quick-change joint for pipeline pressure testing according to claim 1, characterized in that: A plurality of expansion rods (6) are installed between the lower cone (701) and the upper cone (501).

7. The quick-change joint for pipeline pressure testing according to claim 1, characterized in that: The two nuts (205) are both threadedly connected to the water pipe (2).

8. The quick-change joint for pipeline pressure testing according to claim 1, characterized in that: The angle between the lower cone (701) and the upper cone (501) is set to 30 degrees to 50 degrees.

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