Seamless steel tube air tightness detection device

Abstract

The utility model belongs to the technical field of steel pipe detection, and discloses a seamless steel pipe air tightness detection device which comprises a bottom plate, a water retaining strip is fixedly arranged at the edge of the top end of the bottom plate, and a water injection mechanism and a fixing mechanism are arranged at the top end of the bottom plate. The inner surface of the first vertical plate is connected with a moving rod in a sliding mode, the outer surface of the moving rod is connected with a pressure spring in a winding mode, the outer surface of the moving rod is fixedly connected with a fixing plate in a sleeved mode, and one end of the fixing plate is fixedly connected with a first sealing plug. The movable rod drives the fixed plate and the first sealing plug to clamp and fix the seamless steel pipe, and when the fixing force needs to be adjusted, the screw rod can be rotated to push related parts on the first vertical plate, so that a more accurate and appropriate fixing effect is realized, the position stability of the seamless steel pipe in the detection process is effectively ensured, and the detection accuracy is improved.

Description

Technical Field

[0001] This utility model belongs to the field of steel pipe testing technology, specifically a device for testing the air tightness of seamless steel pipes. Background Technology

[0002] Seamless steel pipes, as an important type of metal pipe, are widely used in many industrial fields. For example, in the petrochemical industry, they are used to transport various flammable, explosive, toxic, and harmful media, such as crude oil, natural gas, and chemical raw materials; in the power industry, they are key components for transporting steam, cooling water, and other media in thermal power generation and nuclear power generation units; and in the aerospace field, they are often used as raw materials for some key structural components, playing a vital role in the performance and safety of the overall equipment.

[0003] Meanwhile, the patent specification with application number CN218349723U discloses a seamless steel pipe airtightness testing device, "including a box assembly, a testing component installed near the center of the box assembly, and a seamless steel pipe set on the top of the testing component; this utility model, by setting a purification device, enables the device to filter and purify the testing water when needed, thereby reducing the possibility that the testing water will become turbid due to long-term use and impurities on the seamless steel pipe, making it easier for staff to determine the location of air leaks on the seamless steel pipe, and thus improving the working capacity of the device";

[0004] Existing seamless steel pipe airtightness testing devices often have insufficiently secure fixing methods for seamless steel pipes during use, making the pipes prone to displacement during testing and affecting the accuracy of the test. Secondly, the water injection operation is not convenient or efficient enough, and the sealing of the water injection is difficult to guarantee, which can easily lead to water leakage during the water injection process, thereby interfering with the reliability of the test results.

[0005] Therefore, a seamless steel pipe airtightness testing device is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a seamless steel pipe airtightness testing device, which effectively ensures the stability of the seamless steel pipe's position during the testing process, improves the accuracy of the testing, and allows for the smooth progress of water injection and the entire testing process, thereby enhancing testing efficiency and the reliability of the results.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a seamless steel pipe airtightness testing device, comprising a base plate, a water-blocking strip fixedly provided at the top edge of the base plate, a water injection mechanism and a fixing mechanism provided at the top of the base plate, the fixing mechanism comprising a first vertical plate, a movable rod slidably connected to the inner surface of the first vertical plate, a pressure spring wound around the outer surface of the movable rod, a fixing plate fixedly sleeved on the outer surface of the movable rod, and a first sealing plug fixedly connected to one end of the fixing plate.

[0008] Preferably, one end of the pressure spring is fixedly connected to the fixed plate, and the other end of the pressure spring is fixedly connected to the first vertical plate.

[0009] Preferably, a limiting plate is fixedly connected to the end of the moving rod away from the first sealing plug, and the limiting plate is in contact with the first vertical plate.

[0010] Preferably, one end of the first vertical plate is provided with a lead screw, the first vertical plate is rotatably connected to the lead screw through a bearing, a fixing block is fixedly connected to the top of the bottom plate, the lead screw is threadedly sleeved with the fixing block, a slide bar is fixedly provided at the top of the bottom plate, and a slide groove for use with the slide bar is opened at the bottom of the first vertical plate.

[0011] Preferably, a rotating handle is fixedly connected to one end of the lead screw.

[0012] Preferably, the water injection mechanism includes a second vertical plate, a water pump is provided on one side of the second vertical plate, a transmission pipe is fixedly connected to the inner surface of the second vertical plate, the water pump is connected to the transmission pipe through a water delivery pipe, and the other end of the water pump is connected to a water tank. The water pump is fixedly connected to the base plate, and a second sealing plug is fixedly connected to the outer surface of the transmission pipe away from the water pump. A water outlet pipe is fixedly provided on the inner surface of the second sealing plug.

[0013] Preferably, both the first sealing plug and the second sealing plug are made of rubber and are conical in shape.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by setting up a fixing mechanism, uses a moving rod to drive the fixing plate and the first sealing plug to clamp and fix the seamless steel pipe under the elastic action of the pressure spring. When it is necessary to adjust the fixing force, the relevant components on the first vertical plate can be pushed by rotating the screw, thereby achieving a more precise and appropriate fixing effect, effectively ensuring the stability of the seamless steel pipe's position during the testing process and improving the accuracy of the testing.

[0016] 2. By setting up a water injection mechanism, this utility model can inject water into the seamless steel pipe through the water delivery pipe, transmission pipe and outlet pipe under the power of the water pump. The first sealing plug and the second sealing plug are both made of rubber and are conical, which can make the water injection and the entire testing process go smoothly, and improve the testing efficiency and the reliability of the results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the first vertical plate structure of this utility model;

[0019] Figure 3 This is an exploded view of the second vertical plate and the second sealing plug of this utility model;

[0020] Figure 4 This is a schematic diagram of the water pump and water tank structure of this utility model.

[0021] In the diagram: 1. Base plate; 2. Sliding bar;

[0022] Fixing mechanism; 31. Fixing plate; 32. Compression spring; 33. Slide groove; 34. First sealing plug; 35. First vertical plate; 36. Moving rod;

[0023] 5. Limiting plate; 6. Rotating handle; 7. Lead screw; 8. Fixing block; 9. Water baffle strip;

[0024] 9. Water injection mechanism; 91. Water outlet pipe; 92. Second sealing plug; 93. Transmission pipe; 94. Second vertical plate; 95. Water tank; 96. Water pump. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 4 As shown, this utility model provides a seamless steel pipe air tightness testing device, including a base plate 1, a water-blocking strip 8 fixedly provided at the top edge of the base plate 1, the water-blocking strip is used to prevent water from overflowing from the edge of the base plate 1 during water injection testing, and a water injection mechanism 9 and a fixing mechanism 3 are provided at the top of the base plate 1.

[0027] The fixing mechanism 3 includes a first vertical plate 35, a movable rod 36 is slidably connected to the inner surface of the first vertical plate 35, a pressure spring 32 is wound around the outer surface of the movable rod 36, a fixing plate 31 is fixedly sleeved on the outer surface of the movable rod 36, and a first sealing plug 34 is fixedly connected to one end of the fixing plate 31. Because different seamless steel pipes may have different pipe diameters, the first sealing plug 34 can fit tightly against the end of the steel pipe, achieving a good sealing effect, regardless of the pipe diameter, through the elastic adjustment mechanism of the pressure spring 32.

[0028] Specifically, one end of the pressure spring 32 is fixedly connected to the fixing plate 31, and the other end of the pressure spring 32 is fixedly connected to the first vertical plate 35. The spring not only fixes the seamless steel pipe and the first sealing plug 34, but also eliminates the need to frequently adjust the position of the first vertical plate 35 to fix the seamless steel pipe, thus improving the convenience of the device.

[0029] like Figures 1 to 4 As shown, a limiting plate 4 is fixedly connected to the end of the moving rod 36 away from the first sealing plug 34. The limiting plate 4 is in contact with the first vertical plate 35. The limiting plate 4 plays an important role in limiting the sliding range of the moving rod 36.

[0030] Furthermore, a lead screw 6 is provided at one end of the first vertical plate 35. The first vertical plate 35 is rotatably connected to the lead screw 6 through a bearing. A fixing block 7 is fixedly connected to the top of the base plate 1. The lead screw 6 is threadedly connected to the fixing block 7. A slide bar 2 is fixedly provided at the top of the base plate 1. A slide groove 33 is provided at the bottom of the first vertical plate 35 to cooperate with the slide bar 2, so that the first vertical plate 35 can move smoothly at the top of the base plate 1. This movable design has great convenience and practicality when performing airtightness testing on seamless steel pipes of different lengths.

[0031] like Figures 1 to 4 As shown, a rotating handle 5 is fixedly connected to one end of the lead screw 6, which can conveniently control the rotation of the lead screw 6.

[0032] It is worth noting that the water injection mechanism 9 includes a second vertical plate 94, a water pump 96 is provided on one side of the second vertical plate 94, a transmission pipe 93 is fixedly connected to the inner surface of the second vertical plate 94, the water pump 96 is connected to the transmission pipe 93 through a water supply pipe, and the other end of the water pump 96 is connected to the water tank 95. The water pump 96 is fixedly connected to the base plate 1, and a second sealing plug 92 is fixedly connected to the outer surface of the transmission pipe 93 away from the water pump 96. A water outlet pipe 91 is fixedly provided on the inner surface of the second sealing plug 92. This not only ensures the accuracy of the water injection operation and enables the injection of an appropriate amount of water into the steel pipe for airtightness testing, but also makes the testing environment more enclosed due to the sealed connection between the second sealing plug 92 and the other end of the steel pipe, which is more conducive to accurately judging the airtightness of the steel pipe by observing the situation after water injection.

[0033] like Figures 1 to 4 As shown, both the first sealing plug 34 and the second sealing plug 92 are made of rubber and are conical in shape. The rubber material itself has excellent elasticity and flexibility, which allows them to adapt well to the shape of the inner wall of the seamless steel pipe when in contact with it. The conical shape not only makes the sealing plug easier to insert into the steel pipe, but also allows the device to be used with seamless steel pipes of different diameters.

[0034] The water pump 96 is existing technology and will not be described in detail. Additionally, this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described in detail. The wiring diagram of the motor in this utility model is common knowledge in the field, and its working principle is already known technology. The appropriate model should be selected based on actual use; therefore, the control method and wiring layout of the motor will not be explained in detail.

[0035] Working principle and process: First, the seamless steel pipe to be tested is placed in a suitable position between the fixing mechanism 3 and the water injection mechanism 9 set at the top of the base plate 1. The water-blocking strip 8 at the top edge of the base plate 1 acts as a barrier to prevent water from overflowing outside the device during subsequent water injection. After the seamless steel pipe is placed in place, one end of the steel pipe will squeeze the first sealing plug 34, causing the moving rod 36 to slide within the first vertical plate 35. At this time, the pressure spring 32 is compressed. Due to the elasticity of the pressure spring 32, a reaction force is generated to push the fixing plate 31 and the first sealing plug 34 tightly against one end of the seamless steel pipe, achieving an adaptive sealing effect and ensuring that this end of the steel pipe can maintain good sealing in subsequent testing. Rotating the rotating handle 5 at one end of the lead screw 6 can rotate the lead screw 6, which will drive the first vertical plate 35 to move along the slide bar 2 at the top of the base plate 1. In this way, the position of the fixing mechanism 3 can be adjusted according to the length of the seamless steel pipe, so that both ends of the steel pipe can accurately connect with the sealing plug.

[0036] Once the device is ready, the water pump 96 can draw water from the water tank 95. The second sealing plug 92 is then inserted into the other end of the seamless steel pipe. Since both the first sealing plug 34 and the second sealing plug 92 are made of rubber and are conical, the good elasticity of the rubber and the conical design allow the second sealing plug 92 to fit tightly against the other end of the steel pipe, achieving a sealed connection. At this point, the water drawn by the water pump 96 enters the transmission pipe 93 through the water supply pipe, and then is injected into the seamless steel pipe through the outlet pipe 91 inside the second sealing plug 92. With both ends of the steel pipe sealed, the airtightness of the seamless steel pipe is determined by observing the water injection. If an airtightness problem exists, water will seep out from the leak, thus completing the airtightness test of the seamless steel pipe.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] 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 alterations 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 seamless steel pipe airtightness testing device, comprising a base plate (1), characterized in that: A water-blocking strip (8) is fixedly provided at the top edge of the bottom plate (1), and a water injection mechanism (9) and a fixing mechanism (3) are provided at the top of the bottom plate (1). The fixing mechanism (3) includes a first vertical plate (35), a movable rod (36) is slidably connected to the inner surface of the first vertical plate (35), a pressure spring (32) is wound around the outer surface of the movable rod (36), a fixing plate (31) is fixedly sleeved on the outer surface of the movable rod (36), and a first sealing plug (34) is fixedly connected to one end of the fixing plate (31).

2. The seamless steel pipe airtightness testing device according to claim 1, characterized in that: One end of the pressure spring (32) is fixedly connected to the fixed plate (31), and the other end of the pressure spring (32) is fixedly connected to the first vertical plate (35).

3. The seamless steel pipe airtightness testing device according to claim 1, characterized in that: The end of the moving rod (36) away from the first sealing plug (34) is fixedly connected to a limiting plate (4), and the limiting plate (4) is in contact with the first vertical plate (35).

4. The seamless steel pipe airtightness testing device according to claim 1, characterized in that: One end of the first vertical plate (35) is provided with a lead screw (6), and the first vertical plate (35) is rotatably connected to the lead screw (6) through a bearing. A fixing block (7) is fixedly connected to the top of the bottom plate (1), and the lead screw (6) is threadedly connected to the fixing block (7). A slide bar (2) is fixedly provided at the top of the bottom plate (1), and a slide groove (33) is opened at the bottom of the first vertical plate (35) to cooperate with the slide bar (2).

5. The seamless steel pipe airtightness testing device according to claim 4, characterized in that: One end of the lead screw (6) is fixedly connected to a rotating handle (5).

6. The seamless steel pipe airtightness testing device according to claim 1, characterized in that: The water injection mechanism (9) includes a second vertical plate (94), a water pump (96) is provided on one side of the second vertical plate (94), a transmission pipe (93) is fixedly connected to the inner surface of the second vertical plate (94), the water pump (96) is connected to the transmission pipe (93) through a water supply pipe, and the other end of the water pump (96) is connected to the water tank (95). The water pump (96) is fixedly connected to the base plate (1), and a second sealing plug (92) is fixedly connected to the outer surface of the transmission pipe (93) away from the water pump (96). A water outlet pipe (91) is fixedly provided on the inner surface of the second sealing plug (92).

7. The seamless steel pipe airtightness testing device according to claim 6, characterized in that: Both the first sealing plug (34) and the second sealing plug (92) are made of rubber and are conical in shape.

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