Structure for preventing oil return of double-line distributor
By adding a return spring to the control piston of the dual-wire distributor, blocking the channel between the working piston and the external pipeline, the problem of the working piston rebound caused by the increase in the external pipeline pressure of the traditional dual-wire distributor is solved, and the oil return effect is achieved and the service life of the equipment is extended.
Patent Information
- Application Number
- CN202421616990.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-10
AI Technical Summary
When the traditional dual-wire distributor has residual pressure in the external pipeline or when the bearing is running, the squeezed grease flows backward into the external pipeline, it will cause the working piston to push in reverse, resulting in insufficient bearing lubrication, aggravation of wear, and even lead to equipment blockage or bearing collapse.
By adding a return spring to the control piston, the piston itself blocks the channel between the working piston and the external pipeline, preventing the external pipeline from pushing the working piston backwards.
It effectively prevents the working piston from rebounding, avoids the problems of insufficient bearing lubrication and aggravation of wear, and extends the service life of the equipment.
Smart Images
Figure CN222798214U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an anti-oil return structure, in particular to an anti-oil return structure for a double-line distributor. Background Art
[0002] The channel section action principle of the traditional two-line distributor: when the work is completed, the pressure on both ends of the control piston is completely released, and the pressure on the working piston is also released. If there is residual pressure in the external pipeline at this time, or the bearing squeezes the grease and flows back into the external pipeline during operation, the working piston will be pushed in the opposite direction, which is very serious in normal operation. It will result in no new grease being added to the bearing, and no new grease being added to the other oil outlet of the same channel. If it is not discovered in time, it will lead to insufficient bearing lubrication and increased wear, and eventually lead to equipment jamming or bearing collapse, which will cause great losses to the main equipment and production.
[0003] At present, most special places adopt a one-way valve connected to the oil outlet as a way to prevent grease rebound. This method requires another one-way valve to be connected to the pipeline port. First, the installation cost is high. Second, the space is limited in the area with dense pipelines, and the one-way valve cannot be installed in all areas. Utility Model Content
[0004] In order to solve the problem of distributor rebound, the utility model provides a double-line distributor anti-oil return structure.
[0005] The utility model provides the following technical solutions:
[0006] A double-line distributor anti-oil return structure comprises a valve body, a control piston and a working piston, the upper and lower ends of the valve body are respectively a cavity of an upper oil outlet and a cavity of a lower oil outlet, the cavity of the upper oil outlet and the cavity of the lower oil outlet are respectively connected to respective oil outlet pipe joints, the valve body and the oil outlet pipe joints are both threadedly connected via pipe joints, the upper and lower ends of the control piston are connected to a control piston plug, an upper return spring and a lower return spring are placed between the piston plug and the upper and lower ends of the control piston, the upper and lower ends of the working piston are connected to the working piston plug, and a working piston cavity is formed between the working piston plug and the upper and lower ends of the working piston.
[0007] Furthermore, the cavity of the upper oil outlet of the valve body, the cavity of the lower oil outlet and the control piston are connected through an inclined hole channel.
[0008] Furthermore, the control piston is also connected to the working piston cavities at the upper and lower ends of the working piston through an inclined hole channel.
[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model realizes an anti-oil return structure of a dual-line distributor, including a valve body, a control piston and a working piston. By adding a reset spring to the control piston, the piston itself is used to block the passage between the working piston and the external pipeline to prevent the grease in the external pipeline from pushing back the working piston, thereby cleverly solving the problem of the working piston rebounding due to the increased pressure in the oil outlet pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural schematic diagram of the utility model.
[0011] Figure 2 This is a structural diagram of the utility model in the first working state.
[0012] Figure 3 This is a structural diagram of the utility model in the second working state.
[0013] Figure 4 It is a structural diagram of the utility model in free working state.
[0014] In the figure:
[0015] 100, control piston, 200, working piston;
[0016] 1. Oil outlet pipe joint, 2. Pipe joint thread, 3. Cavity of upper oil outlet, 4. Valve body, 5. Cavity of lower oil outlet, 6. Control piston plug, 7. Working piston plug, 8. Working piston cavity, 9. Oblique hole channel, 10. Upper return spring, 11. Lower return spring, 12. Sealing surface. Implementation
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] Figure 1As shown, the utility model realizes an anti-oil return structure of a dual-line distributor, including a valve body 4, a control piston 100 and a working piston 200, the upper and lower ends of the valve body 4 are respectively a cavity 3 of an upper oil outlet and a cavity 5 of a lower oil outlet, the cavity 3 of the upper oil outlet and the cavity 5 of the lower oil outlet are respectively connected to their own oil outlet pipe joints 1, the valve body 4 and the oil outlet pipe joint 1 are connected via a pipe joint thread 2, the upper and lower ends of the control piston 100 are connected to a control piston plug 6, an upper return spring 10 and a lower return spring 11 are placed between the piston plug 6 and the upper and lower ends of the control piston 100, the upper and lower ends of the working piston 200 are connected to a working piston plug 7, and a working piston cavity 8 is between the working piston plug 7 and the upper and lower ends of the working piston 200.
[0019] The cavity 3 of the upper oil outlet of the valve body 4 , the cavity 5 of the lower oil outlet and the control piston 100 are communicated through the oblique hole channel 9 .
[0020] The control piston 100 is also connected to the working piston cavities 8 at the upper and lower ends of the working piston 200 through the oblique hole channel 9 .
[0021] The utility model adds a return spring to the control piston 100 so as to block the passage between the working piston 200 and the external pipeline by the piston itself, thereby preventing the grease in the external pipeline from pushing back the working piston 200.
[0022] Figure 2 As shown, at this time, the control piston 100 is in the first working state, the control piston 100 moves from bottom to top, the upper return spring 10 of the control piston 100 is in a compressed state, and the lower return spring 11 of the control piston 100 is in a free state.
[0023] Figure 3 As shown, the control piston 100 is in the second working state, the control piston 100 moves from top to bottom, the upper return spring 10 of the control piston 100 is in a free state, and the lower return spring 11 of the control piston 100 is in a compressed state.
[0024] Figure 4 As shown, the upper return spring 10 and the lower return spring 11 are in a free working state, and the pressures in the upper and lower chambers of the control piston 100 are both 0. At this time, the spring force resets the control piston 100 to the center position, and the sealing surface 12 of the control piston 100 just seals the inclined hole channel 9 of the working piston 200.
[0025] The utility model can ingeniously solve the problem of rebound of the working piston 200 caused by increased pressure in the oil outlet pipeline by adding two return springs to the control piston 100 of the distributor.
Claims
1. A double-line distributor anti-oil return structure, characterized in that: The invention comprises a valve body (4), a control piston (100) and a working piston (200); the upper and lower ends of the valve body (4) are respectively a cavity (3) of an upper oil outlet and a cavity (5) of a lower oil outlet; the cavity (3) of the upper oil outlet and the cavity (5) of the lower oil outlet are respectively connected to respective oil outlet pipe joints (1); the valve body (4) and the oil outlet pipe joint (1) are connected via pipe joint threads (2); the upper and lower ends of the control piston (100) are connected to a control piston plug (6); an upper return spring (10) and a lower return spring (11) are placed between the piston plug (6) and the upper and lower ends of the control piston (100); the upper and lower ends of the working piston (200) are connected to a working piston plug (7); a working piston cavity (8) is formed between the working piston plug (7) and the upper and lower ends of the working piston (200).
2. The oil return prevention structure for a dual-line distributor according to claim 1 is characterized in that: The cavity (3) of the upper oil outlet of the valve body (4), the cavity (5) of the lower oil outlet and the control piston (100) are connected via an inclined hole channel (9).
3. The oil return prevention structure for a dual-line distributor according to claim 1 is characterized in that: The control piston (100) is also connected to the working piston cavities (8) at the upper and lower ends of the working piston (200) via an inclined hole channel (9).