Hydraulic tool for small-inner-diameter pipe joint on header
By designing a hydraulic tooling suitable for small inner diameter pipe joints, and using threaded rods and sealing gaskets to seal the pipe mouth, the problem of lack of water pressure tooling for small inner diameter pipe joints in the prior art is solved, and efficient and low-cost hydraulic experimental sealing effect is achieved.
Patent Information
- Application Number
- CN202510171512.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-05-13
AI Technical Summary
The prior art lacks hydraulic tooling suitable for small inner diameter pipe joints, and the ends of the pipe joints need to be re-processed after the hydraulic test, resulting in high costs and increased equipment demand.
A hydraulic tooling for small inner diameter pipe joints on the container is designed. A threaded rod with threaded rods at both ends are equipped with sealing gaskets, baffles and locking nuts. The pipe opening of the pipe joint is sealed through the threaded rod and sealing gasket, and the locking nut is screwed to lock the thread rod.
It realizes effective sealing of small inner diameter pipe joints and good sealing effect in water pressure experiments, with simple structure, easy installation and disassembly, and low production cost.
Smart Images
Figure CN119985119A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a hydraulic tool for a waste heat boiler, in particular to a hydraulic tool for a small inner diameter pipe joint on a header, and belongs to the technical field of boiler equipment. Background Art
[0002] The header needs to be subjected to a water pressure test before leaving the factory. During the water pressure test, the open end of the pipe joint on the pressure-bearing part needs to be sealed, and the sealing of the pipe joint usually adopts an internal expansion plug. The internal expansion plug can be fixed to the pipe joint by the friction force generated by squeezing the inner wall of the pipe joint by the expansion tube, and plays a sealing and sealing role through its seal. However, due to structural limitations, the internal expansion plug cannot be used for pipe joints with small inner diameters. The existing method for sealing small inner diameter pipe joints is to weld and seal the pipe mouth of the pipe joint with a cover plate during the water pressure test, and then cut off the cover plate after the water pressure test is completed. The disadvantage of this solution is that after the pipe mouth of the pipe joint is cut, it is necessary to use special equipment to re-process the welding groove on the pipe mouth of the pipe joint. Because this type of groove is not universal, many companies currently do not have such special equipment, and the number of pipe joints involved is small. If it is specially customized, the cost is also very high, and some water pressure tests need to be completed on site, and the equipment capacity on site is even more limited. Therefore, providing a water pressure tooling for small inner diameter pipe joints on open or flange-connected headers has become a problem that needs to be solved. Summary of the invention
[0003] The present invention mainly solves the technical problems of the prior art that there is a lack of hydraulic tooling for small inner diameter pipe joints and the pipe joint ends need to be re-machined after hydraulic pressure testing, and provides a hydraulic tooling for small inner diameter pipe joints on headers.
[0004] The present invention solves the above-mentioned technical problems mainly through the following technical solutions: the present invention includes a threaded rod with threads at both ends, a connecting piece threadedly connected to the threaded rod at the connecting end, a sealing gasket, a baffle and a locking nut sleeved on the sealing end of the threaded rod, the threaded rod is inserted into the pipe joint and the pipe opening of the pipe joint is sealed by the sealing gasket and the baffle, and when the locking nut is tightened, the connecting piece is stuck in the bottom hole in the cylinder and the threaded rod is locked on the pipe joint.
[0005] Preferably, the threaded rod is a round rod with an outer diameter equivalent to the inner diameter of the pipe fitting. The thread diameter of the sealing end is smaller than the round rod diameter and extends to the inside of the pipe opening of the pipe fitting. A shoulder is formed at the end of the thread at the sealing end to contact the sealing gasket. The outer diameter of the sealing gasket is equivalent to the inner diameter of the pipe fitting.
[0006] Preferably, the sealing gasket is made of pressure-resistant rubber material.
[0007] Preferably, the connecting piece is a steel pipe extending along the axial direction of the cylinder or a curved steel plate that can fit with the inner wall of the cylinder.
[0008] The present invention has a simple structure, reasonable design, and has the following advantages: The present invention is provided with a threaded rod with threads at both ends, one end of the threaded rod is connected to a connector stuck in a cylinder, and the other end is sleeved with a sealing gasket and a baffle. When the locking nut is tightened, the sealing gasket and the baffle are fastened to the pipe opening of the pipe joint, which has the effect of blocking the pipe opening of the pipe joint; during the water pressure test, the threaded rod is used to resist the water pressure, and the sealing gasket is used to seal the pipe opening of the pipe joint, which has a good sealing effect. The present invention has a simple structure and low manufacturing cost. The threaded rod adopts a detachable threaded connection, and the installation and disassembly are convenient and quick.
[0009] Furthermore, the threaded rod adopts a round rod with an outer diameter equivalent to the inner diameter of the pipe joint, which can maximize the strength of the threaded rod and ensure that the threaded rod is sufficient to withstand water pressure; the thread diameter of the sealing end is smaller than the round rod diameter and extends into the pipe mouth of the pipe joint, which allows the sealing gasket to penetrate into the pipe mouth and closely contact the inner wall of the pipe joint when it is squeezed and expanded by the baffle, thereby improving the sealing effect.
[0010] Furthermore, the sealing gasket is made of pressure-resistant rubber material, which can have good strength and elasticity and improve the sealing effect.
[0011] Furthermore, the connecting piece can be made of steel pipe or steel plate according to the actual shape and position of the bottom hole of the cylinder, and a threaded hole connected to the threaded rod is opened on the steel pipe or steel plate; when the bottom hole is far away from the opening of the pressure piece, the connecting piece can be made of a steel pipe of appropriate length, one end of the steel pipe is connected to the threaded rod through the threaded hole and the other end is close to the opening of the pressure piece, which is convenient for installing and removing the connecting piece.
[0012] Therefore, the present invention solves the technical problem of lack of hydraulic tooling for small inner diameter pipe joints in hydraulic pressure tests, and has the advantages of simple and effective structure, convenient installation and disassembly, and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Attached Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention.
[0014] Explanation of the reference numerals: 1. pipe joint; 2. threaded rod; 21. sealing end; 22. connecting end; 3. cylinder; 4. connecting piece; 5. sealing gasket; 6. baffle; 7. locking nut; 8. bottom hole. DETAILED DESCRIPTION
[0015] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.
[0016] Embodiment 1: As attached Figure 1As shown, the present invention has a threaded rod 2 with threads at both ends, a connector 4 threadedly connected to the threaded rod 2 at the connecting end 22, a sealing gasket 5, a baffle 6 and a locking nut 7 sleeved on the sealing end 21 of the threaded rod 2, the threaded rod 2 is inserted into the pipe joint 1 and the pipe opening of the pipe joint 1 is blocked by the sealing gasket 5 and the baffle 6, and when the locking nut 7 is tightened, the baffle 6 is locked at the pipe opening of the pipe joint 1, and the connector 4 is stuck in the bottom hole 8 in the cylinder 3.
[0017] The threaded rod 2 is a round rod with an outer diameter equivalent to the inner diameter of the pipe joint 1. The thread diameter of the sealing end 21 is smaller than the diameter of the round rod and extends to the inside of the pipe opening of the pipe joint 1. The thread end of the sealing end 21 forms a shoulder that contacts the sealing gasket 5. The connecting piece 4 is a steel pipe arranged along the axial direction of the cylinder; The outer diameter of the sealing gasket 5 is equivalent to the inner diameter of the pipe joint 1, and the sealing gasket 5 is made of pressure-resistant rubber material.
[0018] Of course, the above drawings and embodiments are only used to explain and illustrate the present invention, and cannot be used as improper limitations of the present invention. For example, the present invention is also applicable to the water pressure test of small inner diameter pipe joints on the drum. Any technical solutions obtained by those skilled in the art by making equivalent adjustments and changes based on the present invention fall within the protection scope of the present invention.
Claims
1. A hydraulic tool for a small inner diameter pipe joint on a header, characterized in that: The invention comprises a threaded rod (2) with threads at both ends, a connecting piece (4) threadedly connected to the threaded rod (2) at a connecting end (22), a sealing gasket (5), a baffle (6) and a locking nut (7) sleeved on a sealing end (21) of the threaded rod (2), the threaded rod (2) being inserted into a pipe joint (1) and sealing the pipe opening of the pipe joint (1) through the sealing gasket (5) and the baffle (6), and when the locking nut (7) is tightened, the baffle (6) is locked at the pipe opening of the pipe joint (1) and the connecting piece (4) is stuck in a bottom hole (8) in a barrel (1).
2. A hydraulic tool for a small inner diameter pipe joint on a header according to claim 1, characterized in that: The threaded rod (2) is a round rod having an outer diameter equivalent to the inner diameter of the pipe joint (1); the thread diameter of the sealing end (21) is smaller than the diameter of the round rod and extends to the inside of the pipe opening of the pipe joint (1); a shoulder is formed at the thread end of the sealing end (22) for contacting the sealing gasket (5); and the outer diameter of the sealing gasket (5) is equivalent to the inner diameter of the pipe joint (1).
3. A hydraulic tool for a small inner diameter pipe joint on a header according to claim 1, characterized in that: The sealing gasket (5) is made of pressure-resistant rubber material.
4. A hydraulic tool for a small inner diameter pipe joint on a header according to claim 1, 2 or 3, characterized in that: The connecting piece (4) is a steel pipe extending axially along the cylinder (1) or an arc-shaped steel plate fitted to the inner wall of the cylinder (1).