A pressure resistance testing device for seamless steel pipes

Abstract

This utility model relates to the field of pressure resistance testing technology and discloses a pressure resistance testing device for seamless steel pipes. This utility model solves the problem that existing seamless steel pipe testing devices, due to differences in pipe diameter, length, and surface curvature, often have fixed-shape and sized pressing heads that are difficult to perfectly fit the surfaces of steel pipes of various diameters. The device includes a housing, a protective door hinged to one side of the housing, a hydraulic device fixedly mounted on the upper end of the housing, and a fixing component fixedly mounted inside the housing. When a pressure resistance test is required on the seamless steel pipe, the protective door is opened, the seamless steel pipe is placed into the fixing component, and the seamless steel pipe is fixed between the hydraulic fixing component and the fixing component by controlling the hydraulic fixing component. The protective door is then closed, and the hydraulic device is activated to test the seamless steel pipe.

Description

Technical Field

[0001] This utility model relates to the field of pressure resistance testing technology, specifically a pressure resistance testing device for seamless steel pipes. Background Technology

[0002] Seamless steel pipes are made by piercing a single round steel bar, and are steel pipes without weld seams on their surface. Based on the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and jacking pipes, etc. Seamless steel pipes have a wide range of applications, mainly used as pipelines for transporting fluids or as structural components.

[0003] A Chinese patent with publication number CN220019187U discloses a pressure resistance testing device for seamless steel pipes. The pressing component includes a base frame, a horizontal plate vertically mounted on the top of the base frame, a pressing motor mounted on the upper part of the horizontal plate, a pressing telescopic rod mounted below the pressing motor, a pressing plate mounted on the top of the pressing telescopic rod, and an arc-shaped groove on the pressing plate. The pressing motor drives the pressing telescopic rod to extend, and the pressing plate presses the workpiece. At the same time, the testing component detects the pressure resistance performance of the workpiece.

[0004] In the production process of seamless steel pipes, pressure testing devices are needed to test their compressive strength. However, existing testing methods for seamless steel pipes suffer from limitations. Because of variations in pipe diameter and length, and differences in surface curvature, the pressure heads of these devices are typically fixed in shape and size. This makes it difficult for them to perfectly conform to the surfaces of pipes of different diameters. For large-diameter pipes, the pressure head may only contact a localized area of ​​the pipe surface, failing to provide a comprehensive test. For small-diameter pipes, the pressure head may exert excessively concentrated pressure on the surface, causing localized damage and affecting the accuracy of the test results and the overall quality of the pipe. Utility Model Content

[0005] The purpose of this utility model is to provide a pressure testing device for seamless steel pipes. By using this device, the problem of existing seamless steel pipes being unable to perfectly fit the surface of steel pipes of various diameters due to differences in pipe diameter, length, and surface curvature is solved.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure resistance testing device for seamless steel pipes, comprising a device box, the device box including a device shell, a protective door hinged on one side of the device shell, a hydraulic device fixedly installed at the upper end of the device shell, a fixing component fixedly installed inside the device shell, and a hydraulic fixing component fixedly installed inside the device shell, the hydraulic fixing component and the fixing component being located on the same horizontal plane. When a pressure resistance test is required on the seamless steel pipe, the protective door is opened, the seamless steel pipe is placed into the fixing component, the seamless steel pipe is fixed between the hydraulic fixing component and the fixing component by controlling the hydraulic fixing component, the protective door is closed, and the seamless steel pipe is tested by activating the hydraulic device, thereby achieving accurate measurement of the seamless steel pipe.

[0007] Preferably, a control panel is provided on the outside of the device housing, and a support base is fixedly installed inside the device housing. The support base is located at the lower end of the hydraulic device, and the support base and the hydraulic fixing component are on the same horizontal plane. The start and stop of the hydraulic fixing component and the hydraulic device are controlled by the control panel. The support base supports the hydraulic device when it is pressed down, preventing the seamless steel pipe from being subjected to excessive pressure and causing structural damage to the hydraulic fixing component and the fixing component.

[0008] Preferably, the upper end of the device housing is provided with a circular groove that matches the hydraulic device. The protective door is provided with a viewing window, and a handle is fixedly installed on one side of the protective door. When the seamless steel pipe is subjected to pressure test through the protective door, the personnel are protected, and the condition of the seamless steel pipe can be observed through the viewing window.

[0009] Preferably, the hydraulic device includes a fixed plate, with four sets of connecting rods fixedly installed at the lower end of the fixed plate. The lower ends of the connecting rods are all fixedly connected to the device housing. A hydraulic rod is fixedly installed at the lower end of the fixed plate, penetrating the device housing. A disc is fixedly installed at the drive end of the hydraulic rod. A connecting shell is slidably installed on the outer side of the disc. The upper end of the connecting shell is fixedly connected to the device housing. Multiple sets of extrusion strips are provided inside the connecting shell, and the extrusion strips are slidably connected to the connecting shell. Liquid is stored inside the connecting shell. The connecting shell matches the disc, and a pressure sensor is installed at the upper end of the disc. When the hydraulic device is activated to test the seamless steel pipe, the hydraulic rod drives the disc to press down on the liquid inside the connecting shell. The liquid pressure then presses down on the multiple sets of extrusion strips inside the connecting shell, thereby achieving complete fit of the curved surface of the seamless steel pipe of various diameters. At the same time, the pressure sensor detects and performs pressure resistance tests on the seamless steel pipe in real time.

[0010] Preferably, the fixing component includes a connecting column, one side of which is fixedly connected to the inner side of the device housing, and a frustum column 1 is fixedly installed on the other side of the connecting column. Multiple sets of rubber strips are fixedly installed on the outer side of the frustum column 1. The hydraulic fixing component includes a hydraulic rod 2, one side of which is fixedly connected to the inner side of the device housing. A frustum column 2 is fixedly installed on the driving end of the hydraulic rod 2, and multiple sets of rubber strips are fixedly installed on the outer side of the frustum column 2. The frustum column 2 and the frustum column 1 are located on the same horizontal plane. By fitting one end of the seamless steel pipe onto the frustum column 1, and controlling the hydraulic rod 2 to drive the frustum column 2 to squeeze and fix the other end, the seamless steel pipe is treated with anti-slip by the rubber strips, and at the same time, the seamless steel pipe is prevented from falling off due to the gas pressure of the closed ends. The fixed seamless steel pipe is inspected by a hydraulic device.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model proposes a pressure resistance testing device for seamless steel pipes. When a pressure resistance test is required on a seamless steel pipe, the protective door is opened, the seamless steel pipe is placed into the fixing assembly, and the seamless steel pipe is fixed between the hydraulic fixing assembly and the fixing assembly by controlling the hydraulic fixing assembly. The protective door is then closed, and the seamless steel pipe is tested by starting the hydraulic device, thus achieving accurate measurement of the seamless steel pipe. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the device box for a pressure resistance testing device for seamless steel pipes according to this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the device box of the pressure resistance testing device for seamless steel pipes according to this utility model;

[0015] Figure 3 This is a schematic diagram of the outer part of the device box of the pressure resistance testing device for seamless steel pipes according to this utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the device box of the pressure resistance testing device for seamless steel pipes according to this utility model;

[0017] Figure 5 This is an exploded view of the hydraulic device of a pressure testing device for seamless steel pipes according to this utility model.

[0018] In the diagram: 1. Device box; 11. Device shell; 111. Control panel; 112. Circular groove; 12. Protective door; 121. Viewing window; 122. Handle; 13. Hydraulic device; 131. Fixing plate; 132. Connecting rod; 133. Hydraulic rod one; 134. Disc; 135. Connecting shell; 136. Extrusion strip; 14. Fixing assembly; 141. Connecting column; 142. Frustum column one; 1421. Rubber strip; 15. Support base; 16. Hydraulic fixing assembly; 161. Hydraulic rod two; 162. Frustum column two. Detailed Implementation

[0019] 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.

[0020] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0021] Combination Figure 1-2 A pressure resistance testing device for seamless steel pipes includes a device box 1, which includes a device housing 11. A protective door 12 is hinged to one side of the device housing 11. A hydraulic device 13 is fixedly installed at the upper end of the device housing 11. A fixing component 14 is fixedly installed inside the device housing 11, and a hydraulic fixing component 16 is fixedly installed inside the device housing 11. The hydraulic fixing component 16 and the fixing component 14 are located on the same horizontal plane. When a pressure resistance test is required on the seamless steel pipe, the protective door 12 is opened, the seamless steel pipe is placed into the fixing component 14, and the seamless steel pipe is fixed between the hydraulic fixing component 16 and the fixing component 14 by controlling the hydraulic fixing component 16. The protective door 12 is closed, and the hydraulic device 13 is activated to test the seamless steel pipe, thereby achieving accurate measurement of the seamless steel pipe.

[0022] Combination Figure 1-2 A control panel 111 is provided on the outside of the device housing 11, and a support base 15 is fixedly installed inside the device housing 11. The support base 15 is located at the lower end of the hydraulic device 13. The support base 15 and the hydraulic fixing assembly 16 are located on the same horizontal plane. The start and stop of the hydraulic fixing assembly 16 and the hydraulic device 13 are controlled by the control panel 111. The support base 15 supports the hydraulic device 13 when it is pressed down, preventing the seamless steel pipe from being subjected to excessive pressure and causing structural damage to the hydraulic fixing assembly 16 and the fixing assembly 14.

[0023] Combination Figure 2-3The upper end of the device housing 11 is provided with a circular groove 112, which is matched with the hydraulic device 13. The protective door 12 is provided with a viewing window 121, and a handle 122 is fixedly installed on one side of the protective door 12. When the seamless steel pipe is subjected to pressure test through the protective door 12, the staff is protected, and the condition of the seamless steel pipe can be observed through the viewing window 121.

[0024] Combination Figure 2 , Figure 4-5 The hydraulic device 13 includes a fixed plate 131. Four sets of connecting rods 132 are fixedly installed at the lower end of the fixed plate 131. The lower ends of the connecting rods 132 are all fixedly connected to the device housing 11. A hydraulic rod 133 is fixedly installed at the lower end of the fixed plate 131, penetrating the device housing 11. A disc 134 is fixedly installed at the drive end of the hydraulic rod 133. A connecting housing 135 is slidably installed on the outer side of the disc 134. The upper end of the connecting housing 135 is fixedly connected to the device housing 11. Multiple sets of extrusion strips 136 are arranged inside the connecting housing 135. The extrusion strips 136 are connected to the connecting housing... The 135 sliding connection contains liquid stored inside the connecting shell 135. The connecting shell 135 is matched with the disc 134. A pressure sensor is installed at the upper end of the disc 134. When the seamless steel pipe is tested by starting the hydraulic device 13, the hydraulic rod 133 drives the disc 134 to squeeze the liquid inside the connecting shell 135 downward. Then, the liquid pressure squeezes the multiple sets of extrusion strips 136 inside the connecting shell 135 downward, thereby achieving complete fit of the arc surface of the seamless steel pipe of various diameters. At the same time, the pressure sensor detects the pressure resistance test of the seamless steel pipe in real time.

[0025] Combination Figure 2 , Figure 4 The fixing assembly 14 includes a connecting column 141, one side of which is fixedly connected to the inner side of the device housing 11. A frustum column 142 is fixedly installed on the other side of the connecting column 141. Multiple sets of rubber strips 1421 are fixedly installed on the outer side of the frustum column 142. The hydraulic fixing assembly 16 includes a hydraulic rod 161, one side of which is fixedly connected to the inner side of the device housing 11. A frustum column 162 is fixedly installed on the driving end of the hydraulic rod 161. Multiple sets of rubber strips 1421 are fixedly installed on the outside. The second truncated column 162 and the first truncated column 142 are located on the same horizontal plane. One end of the seamless steel pipe is sleeved on the first truncated column 142, and the other end is squeezed and fixed by controlling the second truncated column 162 through the hydraulic rod 161. The rubber strips 1421 are used to prevent the seamless steel pipe from slipping and prevent the seamless steel pipe from falling off due to the gas pressure at both ends. The fixed seamless steel pipe is inspected by the hydraulic device 13.

[0026] Working principle: When a pressure test is required on a seamless steel pipe, open the protective door 12, operate the handle 122 to place the seamless steel pipe into the fixing component 14, and place one end of the steel pipe onto the frustum column 142 on the other side of the connecting column 141. The rubber strip 1421 on the outside of the frustum column 142 provides anti-slip function. Then, control the hydraulic rod 161 of the hydraulic fixing component 16 through the control panel 111 to start, causing the frustum column 162 to press against the other end of the seamless steel pipe, thereby fixing the steel pipe between the hydraulic fixing component 16 and the fixing component 14. Close the protective door 12, and the test is completed through the viewing window. The steel pipe condition can be observed through port 121; then the hydraulic device 13 is activated, and the hydraulic rod 133 at the lower end of the fixed plate 131 drives the disc 134 to move downward, squeezing the liquid inside the connecting shell 135. The liquid pressure pushes multiple sets of extrusion strips 136 inside the connecting shell 135 downward, achieving complete fit of the arc surface of the seamless steel pipe of each diameter. The pressure sensor at the upper end of the disc 134 detects in real time, and the support seat 15 supports the hydraulic device 13 when it is pressed down, preventing the seamless steel pipe from being subjected to excessive pressure and causing structural damage to the hydraulic fixing component 16 and the fixing component 14, thereby realizing the pressure resistance test of the seamless steel pipe.

[0027] 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.

[0028] 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 pressure resistance testing device for seamless steel pipes, characterized in that: The device includes a housing, a protective door hinged to one side of the housing, a hydraulic device fixedly mounted on the upper end of the housing, a fixing component fixedly mounted inside the housing, and a hydraulic fixing component fixedly mounted inside the housing, the hydraulic fixing component and the fixing component being located on the same horizontal plane.

2. The pressure resistance testing device for seamless steel pipes according to claim 1, characterized in that: A control panel is provided on the outside of the device housing, and a support base is fixedly installed inside the device housing. The support base is located at the lower end of the hydraulic device, and the support base and the hydraulic fixing assembly are on the same horizontal plane. The start and stop of the hydraulic fixing components and hydraulic device are controlled by the control panel. The support seat supports the hydraulic device when it is pressed down, preventing the seamless steel pipe from being subjected to excessive pressure and causing structural damage to the hydraulic fixing components and fixing components.

3. The pressure resistance testing device for seamless steel pipes according to claim 2, characterized in that: The upper end of the device housing is provided with a circular groove, which is matched with the hydraulic device. The protective door is provided with a viewing window, and a handle is fixedly installed on one side of the protective door.

4. The pressure resistance testing device for seamless steel pipes according to claim 3, characterized in that: The hydraulic device includes a fixed plate, with four sets of connecting rods fixedly installed at the lower end of the fixed plate. The lower ends of the connecting rods are all fixedly connected to the device housing. A hydraulic rod is fixedly installed at the lower end of the fixed plate, penetrating the device housing. A disc is fixedly installed at the driving end of the hydraulic rod. A connecting shell is slidably installed on the outer side of the disc. The upper end of the connecting shell is fixedly connected to the device housing. Multiple sets of extrusion strips are provided inside the connecting shell, and the extrusion strips are slidably connected to the connecting shell. Liquid is stored inside the connecting shell. The connecting shell matches the disc, and a pressure sensor is provided at the upper end of the disc.

5. The pressure resistance testing device for seamless steel pipes according to claim 1, characterized in that: The fixing component includes a connecting column, one side of which is fixedly connected to the inner side of the device housing, and a frustum column is fixedly installed on the other side of the connecting column. Multiple sets of rubber strips are fixedly installed on the outer side of the frustum column.

6. The pressure resistance testing device for seamless steel pipes according to claim 1, characterized in that: The hydraulic fixing assembly includes a second hydraulic rod, one side of which is fixedly connected to the inner side of the device housing. A second frustum column is fixedly installed at the drive end of the second hydraulic rod, and multiple sets of rubber strips are fixedly installed on the outer side of the second frustum column. The second frustum column and the first frustum column are located on the same horizontal plane.

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