Self-lubricating two-way backstop

Abstract

The utility model discloses a self-lubricating two-way backstop which comprises a backstop body, an oil pipe is fixedly installed on the backstop body, four sets of symmetrically-distributed rubber sheets are arranged in the oil pipe, an oil inlet is formed in the upper portion of the oil pipe, an oil outlet is formed in the lower portion of the backstop body, and a piston plate is arranged in the oil pipe. The piston plate is slidably connected with the oil pipe, a mounting rod is fixedly mounted on the oil pipe, a first piston rod is slidably mounted in the mounting rod, a second piston rod is slidably mounted in the first piston rod, and the end, away from the mounting rod, of the second piston rod is fixedly connected with the piston plate. Two sets of symmetrically-distributed supports are arranged between the backstop and the base, the arranged oil pipe is matched with the piston plate and the oil outlet to achieve automatic adding and replacing of lubricating oil in the backstop, and accumulation of internal heat and abrasion of parts caused by violent friction when the backstop is used are avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of check valves, specifically a self-lubricating bidirectional check valve. Background Technology

[0002] A backstop is an important mechanical transmission device, mainly used to limit the direction of motion of a mechanical system and prevent reverse movement. Through its design principle, the backstop achieves unidirectional torque transmission, protecting mechanical equipment from damage caused by reverse movement and improving work efficiency.

[0003] When a double-sided check valve is in use, heat accumulation and component wear are caused by internal friction. If there is a lack of lubrication, it may lead to overheating of components, accelerated wear, and even affect the normal operation of the check valve. In addition, the use of check valves in the existing technology does not have good shock absorption protection measures. Vibration or shaking during use will also aggravate the wear of the check valve. To address these issues, we propose a self-lubricating double-sided check valve. Utility Model Content

[0004] The purpose of this invention is to provide a self-lubricating bidirectional check valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-lubricating bidirectional backflow preventer, comprising a backflow preventer, an oil pipe fixedly installed on the backflow preventer, four sets of symmetrically distributed rubber sheets provided inside the oil pipe, an oil inlet opening at the top of the oil pipe, an oil outlet opening at the bottom of the backflow preventer, a piston plate provided inside the oil pipe, the piston plate being slidably connected to the oil pipe, an mounting rod fixedly installed on the oil pipe, a first piston rod slidably installed inside the mounting rod, a second piston rod slidably installed inside the first piston rod, the end of the second piston rod away from the mounting rod being fixedly connected to the piston plate, a base provided below the backflow preventer, two sets of symmetrically distributed supports provided between the backflow preventer and the base, and sliders rotatably installed at both ends of the two sets of supports.

[0006] As a further preferred embodiment of this technical solution, the mounting rod is provided with a threaded rod, the first piston rod is provided with a threaded tube, the threaded rod passes through the mounting rod and is rotatably connected to the mounting rod through a bearing, and the threaded tube passes through the first piston rod and is rotatably connected to the first piston rod.

[0007] As a further preferred embodiment of this technical solution, the threaded rod passes through the first piston rod and is threadedly connected to the first piston rod, and the threaded tube passes through the second piston rod and is threadedly connected to the second piston rod.

[0008] As a further preferred embodiment of this technical solution, the threaded rod is provided with two sets of symmetrically distributed limiting grooves, and the threaded tube is provided with two sets of symmetrically distributed limiting blocks. The limiting blocks are correspondingly arranged with the limiting grooves, and the threaded tube is horizontally slidably connected to the threaded rod through the limiting blocks.

[0009] As a further preferred embodiment of this technical solution, both the backstop and the base are fixedly installed with sliding rods, the sliders are slidably sleeved with the corresponding sliding rods, and two sets of symmetrically distributed first springs are sleeved on the sliding rods, with the two ends of the first springs being fixedly connected to the sliders and the sliding rods respectively.

[0010] As a further preferred embodiment of this technical solution, a damping rod is provided between the slider and the corresponding base or backstop, and the two ends of the damping rod are respectively fixedly connected to the corresponding slider and the base or backstop.

[0011] As a further preferred embodiment of this technical solution, a second spring is sleeved on the damping rod, and the two ends of the second spring are respectively fixedly connected to the two ends of the damping rod.

[0012] This utility model provides a self-lubricating bidirectional check valve, which has the following beneficial effects:

[0013] This invention enables the automatic addition and replacement of lubricating oil in the Duyu check valve through the set oil pipe, piston plate and oil outlet. This avoids the accumulation of internal heat and wear of parts caused by severe friction during use of the check valve. The timed addition and replacement of lubricating oil can effectively lubricate the inside of the check valve, reduce the generation of frictional heat, and at the same time reduce the damage to the check valve caused by metal debris due to long-term use of lubricating oil.

[0014] This utility model effectively provides shock absorption protection for the backstop during use by using a bracket between the backstop and the base, along with a first spring, a second spring, and a damping rod. This enhances the stability of the backstop during use and reduces wear caused by vibration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the oil pipe of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the mounting rod of this utility model;

[0018] Figure 4 This is a schematic diagram showing the structural separation between the backstop and the base of this utility model.

[0019] In the diagram: 1. Check valve; 2. Oil pipe; 3. Rubber sheet; 4. Oil inlet; 5. Piston plate; 6. Mounting rod; 7. First piston rod; 8. Second piston rod; 9. Threaded rod; 10. Threaded pipe; 11. Limiting groove; 12. Limiting block; 13. Base; 14. Oil outlet; 15. Slide rod; 16. Bracket; 17. Slider; 18. First spring; 19. Damping rod; 20. Second spring. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] This utility model provides a technical solution: such as Figure 1 , Figure 2 and Figure 3As shown in this embodiment, a self-lubricating bidirectional backflow preventer includes a backflow preventer 1. An oil pipe 2 is fixedly installed on the backflow preventer 1. Four sets of symmetrically distributed rubber sheets 3 are provided inside the oil pipe 2. An oil inlet 4 is opened at the top of the oil pipe 2, and an oil outlet 14 is opened at the bottom of the backflow preventer 1. A piston plate 5 is provided inside the oil pipe 2, and the piston plate 5 is slidably connected to the oil pipe 2. An installation rod 6 is fixedly installed on the oil pipe 2. A first piston rod 7 is slidably installed inside the installation rod 6, and a second piston rod 8 is slidably installed inside the first piston rod 7. The end of the second piston rod 8 away from the installation rod 6 is fixedly connected to the piston plate 5. A backflow preventer 1 is located at the bottom. The device has a base 13, and two sets of symmetrically distributed brackets 16 are provided between the backstop 1 and the base 13. Slider blocks 17 are rotatably mounted at both ends of each set of brackets 16. A threaded rod 9 is provided inside the mounting rod 6, and a threaded tube 10 is provided inside the first piston rod 7. The threaded rod 9 passes through the mounting rod 6 and is rotatably connected to the mounting rod 6 via a bearing. The threaded tube 10 passes through the first piston rod 7 and is rotatably connected to the first piston rod 7. The threaded rod 9 passes through the first piston rod 7 and is threadedly connected to the first piston rod 7. The threaded tube 10 passes through the second piston rod 8 and is threadedly connected to the second piston rod 8. Two sets of symmetrically distributed limiters are provided on the threaded rod 9. The groove 11 contains two sets of symmetrically distributed limiting blocks 12 inside the threaded tube 10. The limiting blocks 12 are correspondingly arranged with the limiting groove 11. The threaded tube 10 is horizontally slidably connected to the threaded rod 9 through the limiting blocks 12. During the use of the check valve 1, lubricating oil can be added to the oil pipe 2 through the oil inlet 4. The motor in the mounting rod 6 is periodically started to drive the rotation of the threaded rod 9. With the limiting effect of the mounting rod 6, the threaded rod 9 pushes the first piston rod 7 to slide to the left in the mounting rod 6 during rotation. Under the action of the limiting blocks 12 and the limiting groove 11, the threaded tube 10 also rotates synchronously with the threaded rod 9 as the first piston rod 7 slides. Under the limiting action of 7, the second piston rod 8 slides to the left in the first piston rod 7, completing the pushing of the piston plate 5. During the process of the piston plate 5 sliding to the left in the oil pipe 2, it pushes the lubricating oil in the oil pipe 2 to the backstop 1, completing the addition of lubricating oil to the backstop 1. In the oil pipe 2, the rubber sheet 3 itself has a certain toughness and elasticity, so when the piston plate 5 is stationary, the lubricating oil will not automatically flow to the backstop 1. The lubricating oil entering the backstop 1 plays the role of lubrication and reducing friction damage. When the piston plate 5 continues to advance, new lubricating oil enters, and the original lubricating oil in the backstop 1 is discharged through the oil outlet 14, completing the periodic replacement of the lubricating oil in the backstop 1.

[0022] like Figure 2 and Figure 4As shown, both the backstop 1 and the base 13 are fixedly installed with sliding rods 15. The sliders 17 are slidably sleeved with the corresponding sliding rods 15. Two sets of symmetrically distributed first springs 18 are sleeved on the sliding rods 15. The two ends of the first springs 18 are fixedly connected to the sliders 17 and the sliding rods 15, respectively. A damping rod 19 is provided between the sliders 17 and the corresponding base 13 or backstop 1. The two ends of the damping rod 19 are fixedly connected to the corresponding sliders 17 and the base 13 or backstop 1, respectively. A second spring 20 is sleeved on the damping rod 19. The two ends of the second spring 20 are fixedly connected to the two ends of the damping rod 19, respectively. When the backstop 1 is subjected to vibration during use, the first springs 18 and the second springs 20 deform due to the vibration force and store energy to buffer the vibration. The damping rod 19 can consume energy and reduce vibration. The damping rod 19 and the springs work together to achieve balance and stability of the backstop 1 and reduce vibration.

[0023] This utility model provides a self-lubricating bidirectional check valve. Its specific working principle is as follows: During use, lubricating oil can be added to the oil pipe 2 through the oil inlet 4. Periodically starting the motor in the mounting rod 6 drives the threaded rod 9 to rotate. With the limiting effect of the mounting rod 6, the threaded rod 9 pushes the first piston rod 7 to slide to the left within the mounting rod 6. Under the action of the limiting block 12 and the limiting groove 11, the threaded pipe 10 rotates synchronously with the threaded rod 9 as the first piston rod 7 slides. Furthermore, under the limiting effect of the first piston rod 7, the second piston rod 8 slides to the left within the first piston rod 7, thus pushing the piston plate 5. As the piston plate 5 slides to the left within the oil pipe 2, it pushes the lubricating oil in the oil pipe 2 towards the check valve 1. The lubricating oil is added to the backstop 1. The rubber sheet 3 in the oil pipe 2 has a certain toughness and elasticity, so the lubricating oil will not flow to the backstop 1 automatically when the piston plate 5 is stationary. The lubricating oil entering the backstop 1 plays a role in lubrication and reducing friction damage. When the piston plate 5 continues to advance, new lubricating oil enters, and the original lubricating oil in the backstop 1 is discharged through the oil outlet 14, thus completing the periodic replacement of the lubricating oil in the backstop 1. When the backstop 1 is subjected to vibration during use, the first spring 18 and the second spring 20 deform due to the vibration force and store energy to have a buffering effect. The damping rod 19 can consume energy and reduce vibration. The damping rod 19 and the spring are used together to achieve balance and stability of the backstop 1 and reduce vibration.

[0024] 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 self-lubricating bidirectional check valve, characterized in that: Includes a check valve (1), on which an oil pipe (2) is fixedly installed. The oil pipe (2) contains four sets of symmetrically distributed rubber sheets (3). An oil inlet (4) is opened above the oil pipe (2), and an oil outlet (14) is opened below the check valve (1). A piston plate (5) is provided inside the oil pipe (2), and the piston plate (5) is slidably connected to the oil pipe (2). An installation rod (6) is fixedly installed on the oil pipe (2). A first piston rod (7) is slidably installed inside the installation rod (6), and a second piston rod (8) is slidably installed inside the first piston rod (7). The end of the second piston rod (8) away from the installation rod (6) is fixedly connected to the piston plate (5). A base (13) is provided below the check valve (1), and two sets of symmetrically distributed brackets (16) are provided between the check valve (1) and the base (13). A slider (17) is rotatably installed at both ends of the two sets of brackets (16).

2. The self-lubricating bidirectional check valve according to claim 1, characterized in that: The mounting rod (6) is provided with a threaded rod (9), and the first piston rod (7) is provided with a threaded tube (10). The threaded rod (9) passes through the mounting rod (6) and is rotatably connected to the mounting rod (6) through a bearing. The threaded tube (10) passes through the first piston rod (7) and is rotatably connected to the first piston rod (7).

3. The self-lubricating bidirectional check valve according to claim 2, characterized in that: The threaded rod (9) passes through the first piston rod (7) and is threadedly connected to the first piston rod (7), and the threaded tube (10) passes through the second piston rod (8) and is threadedly connected to the second piston rod (8).

4. A self-lubricating bidirectional check valve according to claim 2, characterized in that: The threaded rod (9) has two sets of symmetrically distributed limiting grooves (11), and the threaded tube (10) has two sets of symmetrically distributed limiting blocks (12). The limiting blocks (12) are correspondingly arranged with the limiting grooves (11), and the threaded tube (10) is horizontally slidably connected to the threaded rod (9) through the limiting blocks (12).

5. A self-lubricating bidirectional check valve according to claim 1, characterized in that: Both the backstop (1) and the base (13) are fixedly installed with slide rods (15). The slider (17) is slidably sleeved with the corresponding slide rod (15). Two sets of symmetrically distributed first springs (18) are sleeved on the slide rod (15). The two ends of the first spring (18) are fixedly connected to the slider (17) and the slide rod (15) respectively.

6. The self-lubricating bidirectional check valve according to claim 1, characterized in that: A damping rod (19) is provided between the slider (17) and the corresponding base (13) or backstop (1), and the two ends of the damping rod (19) are fixedly connected to the corresponding slider (17) and the base (13) or backstop (1), respectively.

7. A self-lubricating bidirectional check valve according to claim 6, characterized in that: A second spring (20) is sleeved on the damping rod (19), and the two ends of the second spring (20) are fixedly connected to the two ends of the damping rod (19).

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