Novel valve seat welding structure of hydraulic oil cylinder

Abstract

The novel valve seat welding structure of the hydraulic oil cylinder comprises a welding block, a cylinder barrel is arranged at the bottom of the welding block, grooves are symmetrically formed in one side in the cylinder barrel, oil inlets are symmetrically formed in the cylinder barrel, a transition block is arranged in the welding block, a connecting barrel is fixedly connected to the bottom of the transition block, and the connecting barrel is fixedly connected to the bottom of the transition block. A connecting rod is connected into the connecting cylinder in a circular sliding mode, an elastic sealing ring is arranged on the outer side of the connecting cylinder, and a filter screen is fixedly connected to the lower end of the interior of the elastic sealing ring, in the using process of the whole structure, welding slag is prevented from entering the cylinder barrel along with hydraulic oil, and the cleanliness of oil passing through the valve seat and the interior of the cylinder barrel is guaranteed; and the welding block is in threaded connection with the transition block through the threads, the position of the welding block can be rapidly determined, a certain positioning effect is achieved, operation in the welding process is facilitated, the guarantee capacity of welding form and location tolerance is improved, risks are reduced, and meanwhile the product machining efficiency and quality are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic oil cylinders, and particularly relates to a new valve seat welding structure of a hydraulic oil cylinder. Background Art

[0002] In daily production, hydraulic cylinders are widely used as the main actuators in engineering machinery. However, in actual use, cylinders are prone to internal leakage. There are many factors that cause internal leakage of cylinders. The reasons for internal leakage are different in different working conditions and even in different cylinders. Internal leakage will affect the technical performance of hydraulic cylinders, resulting in insufficient power, slow movement speed, weak output, reduced efficiency and unstable operation, which directly affect the overall performance of the cylinder.

[0003] Hydraulic cylinders generally leak internally after being used for a period of time. The main reasons for this are as follows: one is the processing accuracy of parts; the second is assembly problems; and the third is seal damage.

[0004] During the welding process of the cylinder valve seat and the cylinder body, welding slag is very easy to adhere to the gap between the valve seat and the cylinder joint surface. It is difficult to wash off the welding slag during the cylinder cleaning process. As the cylinder is continuously impacted by high-pressure oil during use, the welding slag enters the cylinder body with the hydraulic oil, scratches the seal, and causes leakage in the hydraulic cylinder, thereby causing the internal pressure of the hydraulic cylinder to be lower than the working pressure, reducing the performance of the hydraulic cylinder and even causing failure. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a new valve seat welding structure for a hydraulic cylinder to solve the problem raised in the above background technology that as the cylinder is used, high-pressure oil continuously impacts, welding slag enters the cylinder body along with the hydraulic oil, scratches the seal, causes leakage in the hydraulic cylinder, and thus causes the internal pressure of the hydraulic cylinder to be lower than the working pressure, reduces the performance of the hydraulic cylinder and even causes failure.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new valve seat welding structure of a hydraulic cylinder, comprising a welding block, a cylinder barrel is provided at the bottom of the welding block, a groove is symmetrically provided on one side of the interior of the cylinder barrel, an oil inlet is symmetrically provided inside the cylinder barrel, a transition block is provided inside the welding block, a connecting cylinder is fixedly connected to the bottom of the transition block, a connecting rod is circularly and slidingly connected to the interior of the connecting cylinder, an elastic sealing ring is provided on the outside of the connecting cylinder, a filter screen is fixedly connected to the lower end of the elastic sealing ring, a connecting base is fixedly connected to the top of the welding block, a valve seat and a mounting assembly are respectively provided on the top of the connecting base, and an oil pipe is provided on the top of the cylinder barrel.

[0007] Preferably, a limiting block is fixedly connected to the outer side of the welding block, and the groove and the limiting block are snap-fitted.

[0008] Preferably, a thread is provided inside the welding block, the thread and the transition block are connected by a thread, and the oil inlet and the connecting cylinder are connected by a snap-fit ​​connection.

[0009] Preferably, a spring is fixedly connected to one side of the connecting rod, and the spring and the connecting cylinder are fixedly connected.

[0010] Preferably, the connecting rod is fixedly connected to the elastic sealing ring through a connecting plate.

[0011] Preferably, a fastening plug is snap-connected inside the connecting cylinder, and a flow hole is provided inside the fastening plug.

[0012] Preferably, the valve seat and the mounting assembly are both fixedly connected to the connecting base via fixing bolts.

[0013] Preferably, the valve seat and one side of the interior of the mounting assembly are both rotatably connected with a rotating tube, and the oil pipe and the rotating tube are threadedly connected.

[0014] Compared with the prior art, the present invention provides a new valve seat welding structure for a hydraulic cylinder, which has the following beneficial effects:

[0015] 1. The utility model sets a welding block and a transition block. The transition block and the connecting tube enter the interior of the cylinder through the oil inlet. Then, the elastic reset of the spring is used to push the connecting rod to move, and the internal size of the elastic sealing ring is expanded to achieve the sealing effect of the elastic sealing ring on the welding joint. Then, the fastening plug is installed to fix the position of the connecting rod, which can prevent the welding slag generated during the welding process from splashing into the structure inside the oil cylinder. At the same time, the filter screen can also protect the oil inlet and the outlet of the connecting tube. The overall structure prevents welding slag from entering the interior of the cylinder with the hydraulic oil during use, thereby ensuring the cleanliness of the oil passing through the valve seat and the cylinder. The welding block is threadedly connected to the transition block by a thread, and the position of the welding block can be quickly determined, which plays a certain positioning role, facilitates the operation during the welding process, improves the ability to ensure the welding shape and position tolerance, reduces the risk, and improves the product processing efficiency and quality.

[0016] 2. The utility model reduces the welding area of ​​the direct connection between the valve seat and the cylinder barrel by setting a connecting base and welding the welding block to the cylinder barrel, thereby reducing the degree of welding damage to the cylinder barrel. The valve seat can be detachably mounted on the top of the connecting base by fixing bolts, and the oil pipe is similar. When parts in the valve seat are damaged, they can be separately removed from the cylinder barrel for replacement and maintenance, thereby reducing the maintenance cost after parts in the valve seat are damaged.

[0017] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The utility model has a scientific and reasonable structure, is safe and convenient to use, and provides great help to people. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the axonometric structure of one side of a new type of valve seat welding structure for a hydraulic oil cylinder proposed in the present utility model;

[0020] Figure 2 This is a schematic diagram of the axonometric structure of the other side of a new type of valve seat welding structure for a hydraulic oil cylinder proposed in the present invention;

[0021] Figure 3 This is a schematic diagram of the cylinder structure of a new type of valve seat welding structure of a hydraulic oil cylinder proposed in the utility model;

[0022] Figure 4 This is a schematic diagram of the connection base structure of a new type of valve seat welding structure for a hydraulic cylinder proposed in the utility model;

[0023] Figure 5 This is a schematic diagram of the welding block structure of a new type of valve seat welding structure for a hydraulic cylinder proposed in the utility model;

[0024] Figure 6 This is a schematic diagram of the transition block structure of a new valve seat welding structure for a hydraulic cylinder proposed in the utility model;

[0025] Figure 7 This is a schematic diagram of a fastening plug structure of a new valve seat welding structure of a hydraulic oil cylinder proposed in the utility model;

[0026] In the figure: welding block 1, cylinder 2, groove 3, oil inlet 4, limit block 5, thread 6, transition block 7, connecting cylinder 8, connecting rod 9, spring 10, connecting plate 11, elastic sealing ring 12, filter 13, fastening plug 14, flow hole 15, connecting base 16, valve seat 17, mounting assembly 18, fixing bolt 19, oil pipe 20, rotating tube 21. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-7 The utility model provides a technical solution: a new valve seat welding structure of a hydraulic cylinder, comprising a welding block 1, a cylinder barrel 2 is provided at the bottom of the welding block 1, a groove 3 is symmetrically provided on one side of the cylinder barrel 2, an oil inlet 4 is symmetrically provided inside the cylinder barrel 2, a transition block 7 is provided inside the welding block 1, a connecting cylinder 8 is fixedly connected at the bottom of the transition block 7, a connecting rod 9 is circularly slidably connected to the connecting cylinder 8, an elastic sealing ring 12 is provided on the outside of the connecting cylinder 8, and a filter screen 13 is fixedly connected to the lower end of the elastic sealing ring 12, which can prevent welding slag generated during welding from splashing into the structure inside the oil cylinder. At the same time, the filter screen 13 can also protect the oil inlet 4 and the outlet of the connecting cylinder 8. The overall structure prevents welding slag from entering the cylinder barrel 2 with the hydraulic oil during use, ensuring the cleanliness of the valve seat 17 and the oil passing through the cylinder barrel 2. The top of the welding block 1 is fixedly connected to a connecting base 16, and a valve seat 17 and a mounting assembly 18 are respectively provided on the top of the connecting base 16. An oil pipe 20 is provided on the top of the cylinder barrel 2.

[0029] In the present invention, preferably, the outer side of the welding block 1 is fixedly connected to the limiting block 5, and the groove 3 and the limiting block 5 are snap-fitted, which can quickly determine the position of the welding block 1 and play a certain positioning role, facilitate the operation during the welding process, improve the ability to ensure the welding shape and position tolerance, reduce risks, and improve product processing efficiency and quality.

[0030] In the present invention, preferably, a thread 6 is provided inside the welding block 1, the thread 6 and the transition block 7 are threadedly connected, and the oil inlet 4 and the connecting tube 8 are snap-fitted.

[0031] In the present invention, preferably, a spring 10 is fixedly connected to one side of the connecting rod 9 , and the spring 10 and the connecting tube 8 are fixedly connected.

[0032] In the present invention, preferably, the connecting rod 9 is fixedly connected to the elastic sealing ring 12 through the connecting plate 11 .

[0033] In the present invention, preferably, a fastening plug 14 is snap-connected inside the connecting cylinder 8 , and a flow hole 15 is provided inside the fastening plug 14 .

[0034] In the present invention, preferably, the valve seat 17 and the mounting assembly 18 are fixedly connected to the connecting base 16 by fixing bolts 19. When parts in the valve seat 17 are damaged, they can be removed separately from the cylinder 2 for replacement and repair, thereby reducing the repair cost after the parts in the valve seat 17 are damaged.

[0035] In the present invention, preferably, one side of the valve seat 17 and the inner side of the mounting assembly 18 are both rotatably connected with a rotating tube 21 , and the oil pipe 20 and the rotating tube 21 are threadedly connected.

[0036] The working principle and use process of the present invention are as follows: when in use, first the transition block 7 and the connecting tube 8 enter the interior of the cylinder 2 through the oil inlet 4, the connecting tube 8 is connected with the oil inlet 4 by snapping, and then the elastic reset of the spring 10 is used to push the connecting rod 9 to move, so that the internal size of the elastic sealing ring 12 is expanded, so that the elastic sealing ring 12 can seal the welding joint. Then the fastening plug 14 is installed to fix the position of the connecting rod 9, which can prevent the welding slag generated during the welding process from splashing into the structure inside the oil cylinder. At the same time, the filter screen 13 can also protect the oil inlet 4 and the outlet of the connecting tube 8. The overall structure prevents the welding slag from entering the interior of the cylinder 2 with the hydraulic oil during use, ensuring The cleanliness of the oil passing through the valve seat 17 and the cylinder 2 is checked. Then the welding block 1 is threadedly connected to the transition block 7 through the thread 6, and the limit block 5 is engaged with the groove 3, which can quickly determine the position of the welding block 1 and play a certain positioning role, facilitate the operation during the welding process, improve the ability to ensure the welding shape and position tolerance, reduce the risk and improve the product processing efficiency and quality. Then the welding block 1 is welded to the cylinder 2, and the valve seat 17 is detachably mounted on the top of the connecting base 16 by the fixing bolts 19. The oil pipe 20 is similar. When the parts in the valve seat 17 are damaged, they can be removed separately from the cylinder 2 for replacement and maintenance, reducing the maintenance cost after the parts in the valve seat 17 are damaged.

[0037] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel valve seat welding structure for a hydraulic cylinder, comprising a welding block (1), characterized in that: The welding block (1) is provided with a cylinder (2) at the bottom, a groove (3) is symmetrically provided on one side of the cylinder (2), an oil inlet (4) is symmetrically provided inside the cylinder (2), a transition block (7) is provided inside the welding block (1), a connecting cylinder (8) is fixedly connected to the bottom of the transition block (7), a connecting rod (9) is connected to the connecting cylinder (8) in a circular sliding manner, an elastic sealing ring (12) is provided on the outside of the connecting cylinder (8), a filter screen (13) is fixedly connected to the lower end of the elastic sealing ring (12), a connecting base (16) is fixedly connected to the top of the welding block (1), a valve seat (17) and a mounting assembly (18) are respectively provided on the top of the connecting base (16), and an oil pipe (20) is provided on the top of the cylinder (2).

2. A novel valve seat welding structure for a hydraulic cylinder according to claim 1, characterized in that: The outer side of the welding block (1) is fixedly connected to a limiting block (5), and the groove (3) and the limiting block (5) are in a snap-fit ​​connection.

3. The novel valve seat welding structure of a hydraulic cylinder according to claim 1 is characterized in that: The welding block (1) is provided with a thread (6) inside, the thread (6) and the transition block (7) are threadedly connected, and the oil inlet (4) and the connecting cylinder (8) are snap-fitted.

4. The novel valve seat welding structure of a hydraulic cylinder according to claim 1 is characterized in that: A spring (10) is fixedly connected to one side of the connecting rod (9), and the spring (10) and the connecting cylinder (8) are fixedly connected.

5. The novel valve seat welding structure of a hydraulic cylinder according to claim 1 is characterized in that: The connecting rod (9) is fixedly connected to the elastic sealing ring (12) via a connecting plate (11).

6. The novel valve seat welding structure of a hydraulic cylinder according to claim 1 is characterized in that: The connecting cylinder (8) is internally engaged with a fastening plug (14), and each of the fastening plugs (14) is internally provided with a flow hole (15).

7. The novel valve seat welding structure of a hydraulic cylinder according to claim 1 is characterized in that: The valve seat (17) and the mounting assembly (18) are both fixedly connected to the connecting base (16) via fixing bolts (19).

8. The novel valve seat welding structure of a hydraulic cylinder according to claim 1 is characterized in that: The valve seat (17) and the inner side of the mounting assembly (18) are both rotatably connected to a rotating tube (21), and the oil pipe (20) and the rotating tube (21) are threadedly connected.

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