Steel pipe hydrostatic test tool

Abstract

The utility model provides a steel pipe hydrostatic test tool, which belongs to the technical field of steel pipe production and manufacturing and comprises a frame body, a first sealing disc and a second sealing disc, the first sealing disc is fixed at the left side end of the frame body, and the second sealing disc is movably connected to the right side end of the frame body through a driving part. The steel pipe is connected between the first sealing disc and the second sealing disc in an abutting mode, a water injection hole is formed in the first sealing disc in a penetrating mode, the water injection hole is connected with a pressurizing water pipe and used for injecting pressurizing water into the steel pipe, the movable component comprises a main oil cylinder and an auxiliary oil cylinder, the main oil cylinder controls oil pressure through a proportional valve, and the acting end of the main oil cylinder abuts against the second sealing disc. The action end of the auxiliary oil cylinder abuts against the second sealing disc and is used for sealing the steel pipe. According to the steel pipe hydrostatic test tool provided by the utility model, the auxiliary oil cylinder replaces a main oil cylinder to pressurize and seal the steel pipe, so that the acting force on the steel pipe can be greatly reduced, and the steel pipe is not easy to deform.

Description

Technical Field

[0001] This utility model belongs to the field of steel pipe manufacturing technology, and more specifically, it relates to a steel pipe hydrostatic testing fixture. Background Technology

[0002] Currently, steel pipe hydrostatic testing machines typically use proportional valves to control the flow of water and hydraulic oil during pressurization, thereby controlling the oil pressure in the main cylinder and the water pressure inside the steel pipe to achieve water-oil balance. Water-oil balance refers to the oil and water pressures reaching equilibrium along the axial direction of the steel pipe. Then, the main cylinder pressure is appropriately increased to seal the steel pipe and the sealing disc, preventing leakage and pressure relief. However, in practical applications, due to the large diameter of the main cylinder (for example, the main cylinder diameter of a 4000-ton hydrostatic testing machine reaches 1420mm), even a slight increase in pressure beyond the water-oil balance can cause small-diameter steel pipes to bend, and excessive pressure can also damage the sealing rings. Utility Model Content

[0003] The purpose of this utility model is to provide a steel pipe hydrostatic testing fixture, which aims to solve the technical problems involved in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A steel pipe hydrostatic testing fixture is provided, comprising a frame, a first sealing disc, and a second sealing disc. The first sealing disc is fixed to the left end of the frame, and the second sealing disc is movably connected to the right end of the frame via a driving component. A steel pipe abuts between the first and second sealing discs. A water injection hole is provided through the first sealing disc and connected to a pressurizing water pipe for injecting pressurizing water into the steel pipe. The driving component includes a main oil cylinder and an auxiliary oil cylinder. The main oil cylinder controls the oil pressure through a proportional valve. The actuating end of the main oil cylinder presses against the second sealing disc to achieve water-oil balance in the steel pipe. The actuating end of the auxiliary oil cylinder presses against the second sealing disc to seal the steel pipe.

[0005] In one possible implementation, an annular groove is provided on the opposite end faces of the first sealing disc and the second sealing disc. The annular groove is used to fit into the end of the steel pipe, and a rubber sealing gasket is provided inside the annular groove.

[0006] In one possible implementation, the actuating end of the auxiliary cylinder is fixedly connected to the second sealing disc, and there are multiple auxiliary cylinders, which are evenly distributed around the main cylinder.

[0007] In one possible implementation, the lower end of the second sealing disc is provided with a support member, the lower end of which abuts against the frame and is slidably connected to the frame.

[0008] In one possible implementation, the frame includes a base, with a first mounting portion and a second mounting portion respectively provided at the left and right ends of the base. The first sealing disc is fixed on the first mounting portion, and the second sealing disc is connected to the second mounting portion through the driving component.

[0009] In one possible implementation, the first mounting part includes two first columns arranged symmetrically along the front-rear direction of the base, and the first sealing disc is fixed between the two first columns.

[0010] In one possible implementation, the second mounting part includes two second columns symmetrically arranged along the front-rear direction of the base, with a mounting plate connecting the two second columns. The driving component is fixed on the mounting plate, with the driving end of the driving component facing the first sealing disc, and the second sealing disc connected to the driving end of the driving component.

[0011] In one possible implementation, the support component includes a support base and a rotating wheel, the support base being connected to the lower end of the second sealing disc, the rotating wheel being rotatably connected to the lower end of the support base, and the rotating wheel abutting against the base.

[0012] In one possible implementation, a tension beam connects the first column and the second column located on the same side.

[0013] The beneficial effects of the steel pipe hydrostatic testing fixture provided by this utility model are as follows: Compared with the prior art, the steel pipe hydrostatic testing fixture of this utility model is equipped with a main oil cylinder and an auxiliary oil cylinder. In application, the main oil cylinder controls the oil pressure through a proportional valve to achieve water-oil balance between the first sealing plate and the second sealing plate of the steel pipe. On the basis of water-oil balance, the auxiliary oil cylinder applies force to the steel pipe by pressing against the second sealing plate to seal the steel pipe. Since the pressure required for sealing the steel pipe is much less than the rated pressure of the hydrostatic test, the force on the steel pipe can be greatly reduced by using the auxiliary oil cylinder instead of the main oil cylinder to pressurize and seal the steel pipe, making the steel pipe less prone to deformation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A top view of a steel pipe hydrostatic testing fixture provided for an embodiment of this utility model;

[0016] Figure 2 For along Figure 1 Cross-sectional view of line AA in the middle;

[0017] Figure 3 For along Figure 1 Cross-sectional view of the middle BB line;

[0018] Figure 4 For along Figure 1 Cross-sectional view of the CC line.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Base; 11. First column; 12. Second column; 13. Mounting plate; 14. Tension beam; 2. First sealing disc; 21. Water injection hole; 3. Second sealing disc; 4. Main oil cylinder; 5. Auxiliary oil cylinder; 6. Pressurizing water pipe; 7. Annular groove; 8. Rubber sealing gasket; 9. Support component; 901. Through groove; 91. Support seat; 92. Rotary wheel; 10. Steel pipe. Detailed Implementation

[0021] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the tooling or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Please see Figures 1 to 4 The present invention provides a steel pipe hydrostatic testing fixture. The fixture includes a frame, a first sealing disc 2, and a second sealing disc 3. The first sealing disc 2 is fixed to the left side of the frame, and the second sealing disc 3 is movably connected to the right side of the frame via a driving component. A steel pipe 10 abuts between the first sealing disc 2 and the second sealing disc 3. A water injection hole 21 is provided through the first sealing disc 2, which is connected to a pressurizing water pipe 6 for injecting pressurizing water into the steel pipe 10. The driving component includes a main oil cylinder 4 and an auxiliary oil cylinder 5. The main oil cylinder 4 controls the oil pressure through a proportional valve. The actuating end of the main oil cylinder 4 presses against the second sealing disc 3 to achieve water-oil balance in the steel pipe 10. The actuating end of the auxiliary oil cylinder 5 presses against the second sealing disc 3 to seal the steel pipe 10.

[0026] This utility model provides a steel pipe hydrostatic testing fixture, which, compared with the prior art, is equipped with a main oil cylinder 4 and an auxiliary oil cylinder 5. In application, the main oil cylinder 4 controls the oil pressure through a proportional valve to achieve water-oil balance between the first sealing disc 2 and the second sealing disc 3 of the steel pipe 10. Based on the water-oil balance, the auxiliary oil cylinder 5 presses against the second sealing disc 3 to apply force to the steel pipe 10, thereby sealing the steel pipe 10. Since the pressure required for sealing the steel pipe 10 is much less than the rated pressure of the hydrostatic test, the auxiliary oil cylinder 5 can replace the main oil cylinder 4 to pressurize and seal the steel pipe 10, which can greatly reduce the force on the steel pipe 10 and make the steel pipe 10 less prone to deformation.

[0027] In some embodiments, please refer to Figures 1 to 4The frame includes a base 1. In this embodiment, the base 1 has a square block structure. In practical applications, the ground can also be used as the base 1. In this embodiment, the upper surface of the base 1 is a plane. The left and right sides of the upper surface of the base 1 are respectively provided with a first mounting part and a second mounting part. The first mounting part includes two first columns 11 symmetrically arranged along the front-back direction of the base 1. The two first columns 11 are fixed to the base 1 by welding or bolting. In this embodiment, the first sealing plate 2 has a square plate structure. The first sealing plate 2 is bolted or welded and fixed between the middle parts of the two first columns 11. The second mounting part includes two second columns 12 symmetrically arranged along the front-back direction of the base 1. The two second columns 12 are fixed to the base 1 by welding or bolting. The two second columns 12 are connected by bolts. The mounting plate 13 is fixed by connection or welding. The main oil cylinder 4 and the auxiliary oil cylinder 5 are both fixed to the mounting plate 13 by bolts. The actuating ends of the main oil cylinder 4 and the auxiliary oil cylinder 5 face the first sealing disc 2. The second sealing disc 3 is fixedly connected to the actuating ends of the main oil cylinder 4 and the auxiliary oil cylinder 5 by bolts. The first sealing disc 2 and the second sealing disc 3 are arranged opposite to each other. An annular groove 7 is provided on the opposite end face of the first sealing disc 2 and the second sealing disc 3. A rubber sealing gasket 8 that is adapted to it is inserted in the annular groove 7. In application, the steel pipe 10 is clamped between the first sealing disc 2 and the second sealing disc 3. The two ends of the axial side of the steel pipe 10 are respectively inserted into the annular groove 7 on the same side. By the action of the main oil cylinder 4 and the auxiliary oil cylinder 5, the pipe end of the steel pipe 10 presses against the rubber sealing gasket 8 to achieve sealing of the steel pipe 10.

[0028] In this embodiment, the water injection hole 21 is located in the middle of the first sealing disc 2 and inside the annular groove 7. The pressurizing water pipe 6 is connected to the end of the water injection hole 21 away from the steel pipe 10. In this embodiment, there are two auxiliary oil cylinders 5, which are symmetrically arranged on the upper and lower sides of the main oil cylinder 4. In application, the main oil cylinder 4 is used to maintain water-oil balance, and its diameter needs to be relatively large. For example, when using a 4000-ton hydraulic press for a water pressure test, the diameter of the main oil cylinder 4 is 1420mm. Therefore, even a slight increase in pressure on the basis of water-oil balance may cause small-diameter steel pipes (e.g., steel pipes with a diameter of 508mm) to bend. In application, since the pressure required for sealing the steel pipe 10 is much less than the rated pressure of the water pressure test, the diameter of the auxiliary oil cylinder 5 can be much smaller than the diameter of the main oil cylinder 4. In this embodiment, the diameter of the auxiliary oil cylinder 5 is 120mm. Therefore, when the auxiliary oil cylinder 5 pressurizes the steel pipe 10 for sealing, the force applied to the steel pipe 10 is small, and the steel pipe 10 is not easily deformed. In addition, since the auxiliary cylinder 5 and the main cylinder 4 are connected to the second sealing disc 3 at the same time, after the test is completed, the main cylinder 4 can be quickly pulled back to its original position by controlling the retraction of the auxiliary cylinder 5 with the help of the second sealing disc 3.

[0029] In some embodiments, please refer to Figures 1 to 4 A support component 9 is provided at the lower end of the second sealing disc 3. The lower end of the support component 9 abuts against the frame and is slidably connected to the frame. Specifically, the support component 9 includes a support base 91 and a rotating wheel 92. The support base 91 is connected to the middle of the lower end of the second sealing disc 3. The lower end surface of the support base 91 is provided with a through groove 901 along the moving direction of the second sealing disc 3. The rotating wheel 92 is rotatably connected in the through groove 901 through a rotating shaft, and the rotating wheel 92 abuts against the upper end surface of the base 1. In application, by setting the support component 9, the second sealing disc 3 is supported in the vertical direction, so that the force exerted by the second sealing disc 3 on the actuating ends of the main oil cylinder 4 and the auxiliary oil cylinder 5 in the vertical direction is zero, thereby reducing the internal wear of the main oil cylinder 4 and the auxiliary oil cylinder 5.

[0030] In some embodiments, please refer to Figures 1 to 4 A tension beam 14 is bolted or welded between the first column 11 and the second column 12 located on the same side. The tension beam 14 connects the first mounting part and the second mounting part into a whole. The tension beam 14 is used to bear the reaction force of the first mounting part and the second mounting part during the pressure test, so that the overall structure of the entire tooling is stable.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steel pipe hydrostatic test tooling characterized by, The device includes a frame, a first sealing disc (2), and a second sealing disc (3). The first sealing disc (2) is fixed to the left side of the frame, and the second sealing disc (3) is movably connected to the right side of the frame via a driving component. A steel pipe (10) abuts between the first sealing disc (2) and the second sealing disc (3). A water injection hole (21) is provided through the first sealing disc (2), and the water injection hole (21) is connected to a pressurizing water pipe (6) for injecting pressurizing water into the steel pipe (10). The driving component includes a main oil cylinder (4) and an auxiliary oil cylinder (5). The main oil cylinder (4) controls the oil pressure through a proportional valve. The actuating end of the main oil cylinder (4) presses against the second sealing disc (3) to achieve water-oil balance in the steel pipe (10). The actuating end of the auxiliary oil cylinder (5) presses against the second sealing disc (3) to seal the steel pipe (10).

2. The steel pipe hydrostatic test tooling of claim 1, wherein, The first sealing disc (2) and the second sealing disc (3) are provided with annular grooves (7) on their opposite end faces. The annular grooves (7) are used to fit into the end of the steel pipe (10). A rubber sealing gasket (8) is provided in the annular grooves (7).

3. The steel pipe hydrostatic testing tool of claim 1, wherein, The actuating end of the auxiliary cylinder (5) is fixedly connected to the second sealing disc (3). There are multiple auxiliary cylinders (5), and the multiple auxiliary cylinders (5) are evenly distributed around the main cylinder (4).

4. The steel pipe hydrostatic testing fixture as described in claim 1, characterized in that, The lower end of the second sealing disc (3) is provided with a support member (9), the lower end of the support member (9) abuts against the frame and is slidably connected to the frame.

5. A steel pipe hydrostatic testing tool as claimed in claim 4, wherein, The frame includes a base (1), and the left and right ends of the base (1) are respectively provided with a first mounting part and a second mounting part. The first sealing disc (2) is fixed on the first mounting part, and the second sealing disc (3) is connected to the second mounting part through the driving component.

6. A steel pipe hydrostatic testing tool as claimed in claim 5, wherein, The first mounting part includes two first columns (11) arranged symmetrically along the front and rear direction of the base (1), and the first sealing plate (2) is fixed between the two first columns (11).

7. A hydrostatic testing apparatus for a steel pipe as defined in claim 6, wherein The second mounting part includes two second columns (12) symmetrically arranged along the front and rear direction of the base (1), and a mounting plate (13) is connected between the two second columns (12). The driving component is fixed on the mounting plate (13), and the driving end of the driving component is set towards the first sealing disk (2). The second sealing disk (3) is connected to the driving end of the driving component.

8. The steel pipe hydrostatic testing tool of claim 5, wherein, The support component includes a support base (91) and a rotating wheel (92). The support base (91) is connected to the lower end of the second sealing disc (3), and the rotating wheel (92) is rotatably connected to the lower end of the support base (91). The rotating wheel (92) abuts against the base (1).

9. The steel pipe hydrostatic testing tool of claim 7, wherein, A tension beam (14) connects the first column (11) and the second column (12) located on the same side.

Images