A gas-liquid buffer

Abstract

The present invention provides a gas-liquid buffer, which belongs to the technical field of buffer equipment, and comprises an outer cylinder body and an inner cylinder body; one end of the outer cylinder body is an open end, and a guide rod is arranged inside, and a guide circle is fixed to the end of the guide rod close to the open end of the outer cylinder body; one end of the inner cylinder body is inserted into the outer cylinder body from the open end of the outer cylinder body, and the other end is located outside the outer cylinder body; a guide plate is fixed to the insertion end of the inner cylinder body, and the guide plate is provided with a guide hole; the inner diameter of the guide hole is larger than the outer diameter of the guide rod and smaller than the outer diameter of the guide platform; the inner cylinder body is sleeved on the guide platform and the guide rod through the guide plate, and an isolating piston that moves along its axial direction is also arranged in the inner cylinder body. The gas-liquid buffer provided by the present invention can avoid the situation that the traditional buffer is prone to being unable to be completely reset and misaligned, and has the advantages of large energy absorption, long service life, simple structure and automatic and rapid reset.

Description

Technical Field

[0001] The present invention belongs to the technical field of buffer equipment, and more specifically, relates to a gas-liquid buffer. Background Art

[0002] With the continuous advancement of industrial technology, mechanical equipment is developing towards greater carrying capacity and higher operating speed, which puts forward new requirements for the energy absorption and maximum impact force of the buffer. Therefore, buffer equipment to ensure the safety of mechanical equipment is facing a new challenge: how to safely and smoothly stop the collision of machinery.

[0003] The hydraulic buffers that are currently available consume the impact energy by compressing the hydraulic oil and reciprocating it in different buffer chambers. However, due to the limitations of the materials and structures used, the internal pistons of hydraulic buffers are prone to dislocation under conditions of ultra-high energy to be absorbed and ultra-high pressure impact. In addition, since they rely on the reciprocation of hydraulic oil in different chambers to consume the impact energy, they often fail to reset, leak oil, and leak air. Regular inspections and maintenance and frequent manual repairs increase maintenance costs. In addition, with the improvement of intelligence and automation levels, traditional assembly lines, warehouses, rail vehicles, etc. that rely on manpower are developing towards unmanned automation. The demand for buffers for unmanned operating machinery and equipment tends to be low maintenance frequency and high stability, and even unmanned maintenance. Traditional buffers can no longer meet existing needs. Summary of the invention

[0004] The purpose of the present invention is to provide a gas-liquid buffer, aiming to solve the problems of traditional buffers in which the internal piston is easily dislocated under high-energy impact, the impact energy absorption effect is poor, and it is easy to be unable to reset, leak oil and leak air.

[0005] To achieve the above object, the technical solution adopted by the present invention is to provide a gas-liquid buffer, comprising:

[0006] The outer cylinder has an open end at one end and is provided with a guide rod extending along its axial direction. A guide platform is fixed to the end of the guide rod close to the open end of the outer cylinder;

[0007] An inner cylinder body, one end of which is inserted into the outer cylinder body from the open end of the outer cylinder body, and the other end is located outside the outer cylinder body; a guide plate is fixed to the insertion end of the inner cylinder body, and the guide plate is provided with a guide hole; the inner diameter of the guide hole is larger than the outer diameter of the guide rod and smaller than the outer diameter of the guide platform; the inner cylinder body is arranged on the guide platform and the guide rod through the guide plate, and the inner cylinder body can move along the guide rod; the inner cylinder body is also provided with an isolating piston that moves along its axial direction;

[0008] A nitrogen chamber for containing nitrogen is formed between the inner wall of the inner cylinder body and the isolating piston, an oil chamber for containing hydraulic oil is formed between the inner wall of the outer cylinder body and the guide plate, and when the inner cylinder body moves along the guide rod, a dynamic oil chamber is formed between the inner wall of the inner cylinder body, the guide plate and the isolating piston.

[0009] As another embodiment of the present application, the guide platform is a frustum of a cone structure, and the small-diameter end of the frustum of a cone structure is connected to the guide rod; the guide hole includes a circular hole and a conical hole connected to the circular hole; the small-diameter end of the conical hole is connected to the circular hole, and the inner diameter of the small-diameter end is larger than the outer diameter of the guide rod and smaller than the outer diameter of the large-diameter end of the guide platform; the inner diameter of the large-diameter end of the conical hole is larger than the outer diameter of the large-diameter end of the guide platform.

[0010] As another embodiment of the present application, a first sealing ring is provided between the outer wall of the inner cylinder body and the inner wall of the outer cylinder body.

[0011] As another embodiment of the present application, a second sealing ring is provided between the outer wall of the isolation piston and the inner wall of the inner cylinder body.

[0012] As another embodiment of the present application, one end of the inner cylinder body located outside the outer cylinder body is an open end, and the end is sealed and connected with a collision head baffle.

[0013] As another embodiment of the present application, a one-way valve for injecting nitrogen into the nitrogen chamber is provided on the impact head baffle.

[0014] As another embodiment of the present application, the impact head baffle includes an inner baffle and a removable outer baffle; the inner baffle is fixedly arranged inside the end of the inner cylinder body located outside the outer cylinder body; the outer diameter of the outer baffle is larger than the inner diameter of the inner cylinder body, and it covers the end of the inner cylinder body located outside the outer cylinder body and is fixedly connected to the inner baffle by bolts; the one-way valve is arranged on the inner baffle.

[0015] As another embodiment of the present application, the other end of the outer cylinder body is also an open end, and the end is sealed with a sealing plate, and one end of the guide rod is fixed on the sealing plate.

[0016] As another embodiment of the present application, a flange is installed on the outer cylinder body.

[0017] As another embodiment of the present application, the outer cylinder body and the inner cylinder body are both honing tubes.

[0018] When the gas-liquid buffer of the present invention is subjected to impact force, the inner cylinder moves along the guide rod relative to the outer cylinder, and the guide plate squeezes the oil chamber along the guide rod. Since the inner diameter of the guide hole is larger than the outer diameter of the guide rod, a gap appears between the guide rod and the guide hole, causing the hydraulic oil to flow to the inner cylinder through the guide hole, and forming a dynamic oil chamber between the isolation piston and the guide plate, thereby pushing the isolation piston to squeeze the nitrogen chamber, and the nitrogen in the nitrogen chamber is compressed and consumes the impact energy. During the unloading process, the high air pressure in the nitrogen chamber pushes the isolation piston to move in the direction of the dynamic oil chamber, thereby causing the hydraulic oil in the dynamic oil chamber to return to the oil chamber, and the volume of the oil chamber continues to increase, ultimately pushing the entire inner cylinder to reset. When the inner cylinder is reset, the gas-liquid buffer has also returned to its initial state. Therefore, when the gas-liquid buffer of the present invention is subjected to a high-speed impact, three chambers can be formed: a nitrogen chamber, an oil chamber, and a dynamic oil chamber. The dynamic oil chamber only appears during the loading and unloading process.

[0019] The beneficial effect of the gas-liquid buffer provided by the present invention is that compared with the prior art, when the gas-liquid buffer of the present invention is impacted, the guide rod can guide the inner cylinder body to shrink along its axial direction without dislocation, and at the same time, the buffer can be accurately reset when unloading, avoiding dislocation, damage and difficulty in automatic reset of the gas-liquid buffer.

[0020] When the gas-liquid buffer of the present invention is hit, a gap appears between the guide rod and the guide hole, and the hydraulic oil enters the inner cylinder around the side of the guide rod, and pushes the isolation piston to move toward the nitrogen chamber, forming a dynamic oil chamber between the isolation piston and the guide plate. In addition, the special liquid impact flow formed by the hydraulic oil entering the inner cylinder around the side of the guide rod generates a uniform impact force on the isolation piston, thereby preventing the isolation piston from losing balance and causing dislocation due to a huge impact force.

[0021] The three chambers formed by the gas-liquid buffer of the present invention when impacted will be smoothly compressed and absorb energy, and have the advantages of large energy absorption, long service life, simple structure, etc., especially when dealing with sudden high-speed impacts, it can smoothly stop the impacting object and consume the impact energy without oil leakage and air leakage. In the future when high-speed machinery and heavy machinery continue to increase speed and load capacity, the performance advantages of the gas-liquid buffer of the present invention will be more obvious, and the resetting process of the gas-liquid buffer is to restore the inner cylinder body to its initial state by nitrogen pushing the isolation piston to compress the dynamic oil chamber, which greatly improves the service life of the buffer, and is fully capable of undertaking the buffering tasks of extra-large strokes and ultra-high energy absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of the gas-liquid buffer in a non-load state provided by an embodiment of the present invention;

[0023] Figure 2A schematic diagram of the structure of the gas-liquid buffer load state provided by an embodiment of the present invention;

[0024] In the figure: 1. outer cylinder body; 2. guide rod; 3. guide platform; 4. sealing plate; 5. inner cylinder body; 6. guide plate; 7. isolation piston; 8. guide hole; 9. inner baffle plate; 10. outer baffle plate; 11. one-way valve; 12. first sealing ring; 13. second sealing ring; 14. flange; 15. oil chamber; 16. nitrogen chamber; 17. dynamic oil chamber. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] Please also read Figure 1 and Figure 2 The gas-liquid buffer provided by the present invention is now described. The gas-liquid buffer comprises an outer cylinder body 1 and an inner cylinder body 5; one end of the outer cylinder body 1 is an open end, and a guide rod 2 extending along its axial direction is provided inside, and a guide platform 3 is fixed to the end of the guide rod 2 close to the open end of the outer cylinder body 1; one end of the inner cylinder body 5 is inserted into the outer cylinder body 1 from the open end of the outer cylinder body 1, and the other end is located outside the outer cylinder body 1; a guide plate 6 is fixed to the insertion end of the inner cylinder body 5, and the guide plate 6 is provided with a guide hole 8; the inner diameter of the guide hole 8 is larger than the outer diameter of the guide rod 2 and smaller than the outer diameter of the guide platform 3; the inner cylinder body 5 is inserted into the outer cylinder body 1 through the guide rod 2. The guide plate 6 is sleeved on the guide platform 3 and the guide rod 2; and the inner cylinder body 5 can move along the guide rod 2; an isolating piston 7 is also provided in the inner cylinder body 5 and moves along its axial direction; wherein, a nitrogen chamber 16 for containing nitrogen is formed between the inner wall of the inner cylinder body 5 and the isolating piston 7, and an oil chamber 15 for containing hydraulic oil is formed between the inner wall of the outer cylinder body 1 and the guide plate 6; when the inner cylinder body 5 moves along the guide rod 2, a dynamic oil chamber 17 is formed between the inner wall of the inner cylinder body 5, the guide plate 6 and the isolating piston 7.

[0027] When the gas-liquid buffer of the present invention is subjected to impact force, the inner cylinder body 5 moves along the guide rod 2 relative to the outer cylinder body 1, and the guide plate 6 squeezes the oil chamber 15 along the guide rod 2. Since the inner diameter of the guide hole 8 is larger than the outer diameter of the guide rod 2, a gap appears between the guide rod 2 and the guide hole 8, so that the hydraulic oil flows to the inner cylinder body 5 through the guide hole 8, and forms a dynamic oil chamber 17 between the isolation piston 7 and the guide plate 6, thereby pushing the isolation piston 7 to squeeze the nitrogen chamber 16, and the nitrogen compresses and consumes the impact energy. During the unloading process, the high air pressure in the nitrogen chamber 16 pushes the isolation piston 7 to move toward the dynamic oil chamber 17, thereby causing the hydraulic oil in the dynamic oil chamber 17 to return to the oil chamber 15, and the volume of the oil chamber 15 continues to increase, and finally pushes the entire inner cylinder body 5 to reset. When the inner cylinder body 5 is reset, the gas-liquid buffer also returns to the initial state. Therefore, when the gas-liquid buffer of the present invention is subjected to high-speed impact, three chambers can be formed: the nitrogen chamber 16, the oil chamber 15 and the dynamic oil chamber 17. The dynamic oil chamber 17 only appears during the loading and unloading process.

[0028] The beneficial effect of the gas-liquid buffer provided by the present invention is that compared with the prior art, when the gas-liquid buffer of the present invention is impacted, the guide rod 2 can guide the inner cylinder body 5 to shrink in a straight direction without dislocation, and the buffer can be accurately reset when unloading, avoiding the gas-liquid buffer from being dislocated, damaged, and difficult to automatically reset. When the gas-liquid buffer of the present invention is impacted, a gap appears between the guide rod 2 and the guide hole 8, and the hydraulic oil enters the inner cylinder body 5 along the gap between the guide rod 2 and the guide hole 8, and pushes the isolation piston 7 to move toward the nitrogen chamber 16, forming a dynamic oil chamber 17 between the isolation piston 7 and the guide plate 6. The special liquid impact flow formed by the hydraulic oil entering the inner cylinder body 5 around the side of the guide rod 2 produces a uniform impact force on the isolation piston 7, avoiding the isolation piston 7 from losing balance and causing dislocation due to a huge impact force.

[0029] The three chambers formed by the gas-liquid buffer of the present invention when impacted will be smoothly compressed and absorb energy, and have the advantages of large energy absorption, long service life, and simple structure. Especially in response to sudden high-speed impacts, it can smoothly stop the impacting object and consume the impact energy. In the future when high-speed machinery and heavy machinery continue to increase their speed and load capacity, the performance advantages of the gas-liquid buffer of the present invention will be more obvious, and the resetting process of the gas-liquid buffer is to push the isolation piston 7 with nitrogen to compress the dynamic oil chamber 17 to restore the inner cylinder body 5 to its initial state, which greatly improves the service life of the buffer and is fully capable of undertaking the buffering tasks of extra-large strokes and ultra-high energy absorption.

[0030] As a specific embodiment of the gas-liquid buffer provided by the present invention, please refer to Figure 1The guide platform 3 is a truncated cone structure, and the small-diameter end of the truncated cone structure is connected to the guide rod 2; the guide hole 8 includes a circular hole and a conical hole connected to the circular hole; the small-diameter end of the conical hole is connected to the circular hole, and the inner diameter of the end is larger than the outer diameter of the guide rod 2 and smaller than the outer diameter of the large-diameter end of the guide platform 3; the inner diameter of the large-diameter end of the conical hole is larger than the outer diameter of the large-diameter end of the guide platform 3. The shape design of the guide platform 3 and the guide hole 8 can make the hydraulic oil of the gas-liquid buffer flow out along the inner side of the guide hole 8 at the initial load stage, forming an annular liquid impact flow, so that the hydraulic oil forms a uniform annular impact force on the isolation piston 7, further ensuring that the isolation piston 7 will not lose balance and cause dislocation when subjected to a huge impact force.

[0031] As a specific embodiment of the gas-liquid buffer provided by the present invention, please refer to Figure 1 A first sealing ring 12 is provided between the outer wall of the inner cylinder body 5 and the inner wall of the outer cylinder body 1 .

[0032] As a specific embodiment of the gas-liquid buffer provided by the present invention, please refer to Figure 1 A second sealing ring 13 is provided between the outer wall of the isolation piston 7 and the inner wall of the inner cylinder body 5. The provision of the first sealing ring 12 and the second sealing ring 13 can further strengthen the isolation between the nitrogen chamber 16, the oil chamber 15 and the external environment to prevent leakage of nitrogen or hydraulic oil.

[0033] As a specific embodiment of the gas-liquid buffer provided by the present invention, please refer to Figure 1 The end of the inner cylinder body 5 outside the outer cylinder body 1 is an open end, and the end is sealed and connected with a collision head baffle.

[0034] As a specific embodiment of the gas-liquid buffer provided by the present invention, please refer to Figure 1 A one-way valve 11 for injecting nitrogen into the nitrogen chamber 16 is provided on the impact head baffle.

[0035] As a specific embodiment of the gas-liquid buffer provided by the present invention, please refer to Figure 1 The impact head baffle plate includes an inner baffle plate 9 and a detachable outer baffle plate 10; the inner baffle plate 9 is fixedly arranged inside the end of the inner cylinder body 5 located outside the outer cylinder body 1; the outer diameter of the outer baffle plate 10 is larger than the inner diameter of the inner cylinder body 5, and it covers the end of the inner cylinder body 5 located outside the outer cylinder body 1 and is fixedly connected to the inner baffle plate 9 by bolts; the one-way valve 11 is arranged on the inner baffle plate 9. The arrangement of the outer baffle plate 10 can further increase the airtightness of the nitrogen chamber 16, share part of the pressure borne by the one-way valve 11, and avoid damage and leakage of the one-way valve 11.

[0036] As a specific embodiment of the gas-liquid buffer provided by the present invention, please refer to Figure 1 The other end of the outer cylinder body 1 is also an open end, and the end is tightly connected to a blocking plate 4 , and one end of the guide rod 2 is fixed on the blocking plate 4 .

[0037] As a specific embodiment of the gas-liquid buffer provided by the present invention, please refer to Figure 1 , a flange 14 is mounted on the outer cylinder body 1. The flange 14 can be used to fix the gas-liquid buffer to prevent tilting and breaking during the entire buffer loading process.

[0038] As a specific embodiment of the gas-liquid buffer provided by the present invention, the outer cylinder body 1 and the inner cylinder body 5 are both honing tubes. The honing tubes can further ensure the sealing performance of the gas-liquid buffer and prevent gas and liquid from leaking out of the buffer.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas-liquid buffer, characterized in that: include: The outer cylinder has an open end at one end and is provided with a guide rod extending along its axial direction. A guide platform is fixed to the end of the guide rod close to the open end of the outer cylinder; The inner cylinder body has one end inserted into the outer cylinder body from the open end of the outer cylinder body, and the other end is located outside the outer cylinder body; a guide plate is fixed to the insertion end of the inner cylinder body, and the guide plate is provided with a guide hole; the inner diameter of the guide hole is larger than the outer diameter of the guide rod and smaller than the outer diameter of the guide platform; the inner cylinder body is sleeved on the guide platform and the guide rod through the guide plate, and the inner cylinder body can move along the guide rod; the inner cylinder body is also provided with an isolation piston that moves along its axial direction; A nitrogen chamber for containing nitrogen is formed between the inner wall of the inner cylinder and the isolating piston, an oil chamber for containing hydraulic oil is formed between the inner wall of the outer cylinder and the guide plate, and when the inner cylinder moves along the guide rod, a dynamic oil chamber is formed between the inner wall of the inner cylinder, the guide plate and the isolating piston; The guide platform is a truncated cone structure, and the small-diameter end of the truncated cone structure is connected to the guide rod; The guide hole includes a circular hole and a conical hole connected to the circular hole; the small-diameter end of the conical hole is connected to the circular hole, and the inner diameter of the small-diameter end is larger than the outer diameter of the guide rod and smaller than the outer diameter of the large-diameter end of the guide platform; the inner diameter of the large-diameter end of the conical hole is larger than the outer diameter of the large-diameter end of the guide platform; The other end of the outer cylinder body is also an open end, and is sealed with a blocking plate, and one end of the guide rod is fixed on the blocking plate.

2. The gas-liquid buffer according to claim 1, characterized in that: A first sealing ring is provided between the outer wall of the inner cylinder body and the inner wall of the outer cylinder body.

3. The gas-liquid buffer according to claim 1, characterized in that: A second sealing ring is provided between the outer wall of the isolation piston and the inner wall of the inner cylinder body.

4. The gas-liquid buffer according to claim 1, characterized in that: One end of the inner cylinder body located outside the outer cylinder body is an open end, and the end is sealed and connected with a collision head baffle.

5. The gas-liquid buffer according to claim 4, characterized in that: The impact head baffle is provided with a one-way valve for injecting nitrogen into the nitrogen cavity.

6. The gas-liquid buffer according to claim 5, characterized in that: The impact head baffle includes an inner baffle and a detachable outer baffle; the inner baffle is fixedly arranged inside the end of the inner cylinder body located outside the outer cylinder body; the outer diameter of the outer baffle is larger than the inner diameter of the inner cylinder body, and it covers the end of the inner cylinder body located outside the outer cylinder body and is fixedly connected to the inner baffle by bolts; the one-way valve is arranged on the inner baffle.

7. The gas-liquid buffer according to claim 1, characterized in that: A flange is installed on the outer cylinder body.

8. The gas-liquid buffer according to any one of claims 1 to 7, characterized in that: The outer cylinder body and the inner cylinder body are both honing tubes.

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