Quick drop valve device suitable for oil cylinder of bulldozer
By designing the fast and slow adjustment chamber communication and throttling section in the housing, the connecting between the rodless cavity and the rod-haul cavity is achieved, the energy loss problem of existing fast-down valve devices is solved, and the rapid descent speed of the shovel is improved.
Patent Information
- Application Number
- CN202420368282.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The existing bulldozer quick-down valve device can only partially replenish oil, resulting in energy loss and cannot meet the demand for rapid decreasing of the blade.
A quick-down valve device including a housing, a valve chamber, a rodless chamber oil passage, a hydraulic adjustment oil passage and a rod chamber oil passage are designed. Through the communication between the rapid adjustment chamber and the slow adjustment chamber, the throttling section and The pressure difference of the spring realizes the communication between the rodless cavity and the rod-well cavity, ensures oil replenishment, and improves the speed of the blade drop.
It effectively makes up for the insufficient pump oil, improves the rapid descent speed of the blade, reduces energy losses, and ensures that the bulldozer can obtain a larger speed before cutting the soil.
Smart Images
Figure CN222229013U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic valves, in particular to a quick-drop valve device suitable for a bulldozer oil cylinder. Background Art
[0002] The quick-descent valve is an important component of the bulldozer blade lifting system. Its function is to automatically connect the oil in the rod chamber and the rodless chamber of the cylinder through the valve when the blade is descending, so that the blade can be quickly lowered. A higher speed can be obtained before the blade cuts the soil, and the quick-descent function of the blade can be used to carry out some frozen soil crushing operations.
[0003] For example, the application document with publication number CN205824273U discloses a novel quick-drop valve for bulldozer blade lifting cylinder, in which the valve sleeve can move in the valve cavity to extend the spring and block the oil passage d, so as to replenish oil to the cylinder bottom when the blade descends rapidly to prevent it from being sucked empty, but the quick-drop valve can only partially replenish oil, resulting in energy loss.
[0004] In order to solve the above problems existing in the prior art, we propose a quick-drop valve device suitable for a bulldozer cylinder. Utility Model Content
[0005] The utility model provides a quick-drop valve device suitable for a bulldozer oil cylinder, aiming to solve the technical problem that the existing quick-drop valve structure can only realize partial oil replenishment and has energy loss.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A quick-drop valve device suitable for a bulldozer oil cylinder comprises a housing, a valve cavity is arranged in the housing, a rodless cavity oil passage and a hydraulic regulating oil passage are arranged on both sides of the valve cavity, the rodless cavity oil passage is connected to the valve cavity through a quick regulating cavity, the hydraulic regulating oil passage is connected to the valve cavity through a slow regulating cavity, the quick regulating cavity is located above the slow regulating cavity, a rod cavity oil passage connected to the slow regulating cavity is also arranged in the housing, and the upper part of the valve cavity is also connected to the hydraulic regulating oil passage through an oil passage A;
[0008] A valve sleeve is slidably provided in the valve cavity, a valve core is provided in the valve sleeve, a spring is provided in the valve core for pressing the valve core and the valve sleeve, an adjusting groove is provided in the valve sleeve, an oil passage B is provided in the adjusting groove and penetrates downwardly through the valve sleeve, an oil hole A is provided in the valve sleeve, and an oil hole B is provided in the valve core.
[0009] Preferably, the housing is provided with a valve cover, a valve body and a base which are arranged in sequence from top to bottom and are detachably connected;
[0010] The valve cover is provided with a rodless chamber hydraulic pressure regulating port connected to the rodless chamber oil passage, and the rodless chamber hydraulic pressure regulating port is used to be connected to a hydraulic system for regulating the flow direction of oil inside the housing;
[0011] A hydraulic regulating port communicated with the hydraulic regulating oil passage, the hydraulic regulating port being used to connect with a hydraulic system for regulating the flow direction of oil inside the housing;
[0012] A rod chamber communication port communicated with the rod chamber oil passage, the rod chamber communication port being used to communicate with the rod chamber of the oil cylinder;
[0013] A rodless chamber communication port communicating with the rodless chamber oil passage is formed on the outer wall of the valve body near the end of the rodless chamber oil passage. The rodless chamber communication port is used to communicate with the rodless chamber of the oil cylinder.
[0014] Preferably, the valve cover and the valve body are tightly connected via positioning pins, and the valve body and the base are tightly connected via positioning pins.
[0015] Preferably, a throttling section is provided in the hydraulic regulating oil passage, a throttling sleeve is provided above the throttling section, and the throttling sleeve is provided with a vertical throttling hole corresponding to the throttling section and a horizontal oil hole corresponding to the oil passage A.
[0016] Preferably, the shell is provided with a plurality of mounting holes which penetrate the shell transversely.
[0017] Preferably, a process hole is provided on one side of the shell body close to the hydraulic regulating oil passage, and the process hole is sealed with a screw plug.
[0018] Preferably, a plurality of flow grooves are provided on the inner wall of the valve cavity.
[0019] Compared with the prior art, the beneficial effects of the utility model are:
[0020] When the bulldozer of the bulldozer needs to descend quickly, a slow and small-flow valve is connected to the hydraulic system pipeline connected to the hydraulic regulating oil channel, and the weight of the bulldozer blade tends to drag the telescopic rod of the oil cylinder to move downward quickly. When the blade descends at a certain speed, the return oil in the rod chamber forms a pressure difference above and below the throttling section. When its force resists the force of the spring, the valve sleeve and the valve core are pushed upward. Then the adjusting groove of the valve sleeve is connected to the rodless chamber oil channel, thereby connecting the rodless chamber oil channel with the rod chamber oil channel. At this time, all the oil in the rod chamber is replenished into the rodless chamber to make up for the shortage of pump oil, so that the blade can descend quickly and obtain a higher speed before the blade cuts the soil, thereby solving the problem that the existing quick-descent valve structure can only achieve partial oil replenishment and energy loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a cross-sectional schematic diagram (side view) of the utility model;
[0022] Figure 2 It is a cross-sectional schematic diagram (front view) of the utility model;
[0023] Figure 3 It is a front view of the utility model.
[0024] In the figure: 1. Shell; 11. Valve cover; 111. Hydraulic adjustment port of rodless chamber; 112. Hydraulic adjustment port; 113. Connecting port of rod chamber; 12. Valve body; 121. Connecting port of rodless chamber; 13. Base; 14. Mounting hole; 15. Process hole; 2. Valve chamber; 21. Valve sleeve; 211. Adjustment groove; 212. Oil passage B; 213. Oil passage hole; 22. Valve core; 221. Oil passage B; 23. Spring; 24. Circulation groove; 3. Oil passage of rodless chamber; 31. Fast adjustment chamber; 4. Hydraulic adjustment oil passage; 41. Slow adjustment chamber; 42. Throttle sleeve; 5. Oil passage of rod chamber; 6. Oil passage A. DETAILED DESCRIPTION
[0025] A preferred embodiment of the present invention will be described below in conjunction with the accompanying drawings to clearly and completely describe the technical solution in a preferred embodiment of the present invention.
[0026] like Figure 1 and Figure 2 As shown, the utility model provides a quick-drop valve device suitable for a bulldozer cylinder, comprising a shell 1, a valve chamber 2 is arranged in the shell 1, a rodless chamber oil passage 3 and a hydraulic regulating oil passage 4 are respectively arranged on both sides of the valve chamber 2, the rodless chamber oil passage 3 is connected with the valve chamber 2 through a fast regulating chamber 31, the hydraulic regulating oil passage 4 is connected with the valve chamber 2 through a slow regulating chamber 41, the fast regulating chamber 31 is located above the slow regulating chamber 41, a rod chamber oil passage 5 connected with the slow regulating chamber 41 is also arranged in the shell 1, and the upper part of the valve chamber 2 is also connected with the hydraulic regulating oil passage 4 through an oil passage A6; a valve sleeve 21 is slidably arranged in the valve chamber 2, a valve core 22 is arranged in the valve sleeve 21, the valve core 22 is provided with a spring 23 for pressing the valve core 22 and the valve sleeve 21, the valve sleeve 21 is provided with an adjusting groove 211, the adjusting groove 211 is provided with an oil passage B212 which penetrates downward through the valve sleeve 21, the valve sleeve 21 is provided with an oil hole A213, and the valve core 22 is provided with an oil hole B221.
[0027] Through the above design, the utility model has the bottom end of the rodless chamber oil passage 3 connected to the rodless chamber of the oil cylinder, the top end of the rod chamber oil passage 5 connected to the rod chamber of the oil cylinder, the top end of the hydraulic adjustment oil passage 4 and the top end of the rodless chamber oil passage 3 are connected to the hydraulic system respectively, and the hydraulic system adjusts the flow direction of the oil inside the shell 1 to control the extension and retraction action of the telescopic rod of the oil cylinder.
[0028] like Figure 2As shown, when the bulldozer blade needs to be lowered slowly: a high-speed and high-flow valve is connected to the hydraulic system pipeline connected to the hydraulic regulating oil passage 4, so that the pressure on the left side of the oil passage A6 is greater than the pressure on the right side. At this time, the flow rate of the oil in the valve chamber 2 from the oil passage A6 to the hydraulic regulating oil passage 4 is small, so that the oil pressure on the upper part of the valve core 22 is greater than the oil pressure at the bottom of the valve sleeve 21, so that the bottom of the valve sleeve 21 is pressed tightly against the base 13 of the housing 1, and then the regulating groove 211 of the valve sleeve 21 is not connected with the rodless chamber oil passage 3;
[0029] When the telescopic rod of the oil cylinder retracts, most of the oil in the rodless chamber of the oil cylinder returns to the oil tank from the rodless chamber oil channel 3 via the hydraulic system. When the telescopic rod of the oil cylinder extends, the oil in the oil tank enters the rodless chamber of the oil cylinder from the rodless chamber oil channel 3, and the oil in the rod chamber of the oil cylinder flows out from the rod chamber oil channel 5 via the slow adjustment chamber 41 and from the hydraulic adjustment oil channel 4. The oil in the rodless chamber of the oil cylinder only comes from the pump oil, thereby completing the slow descent of the bulldozer.
[0030] When the bulldozer of the bulldozer needs to descend quickly, a slow and small-flow valve is connected to the hydraulic system pipeline connected to the hydraulic regulating oil channel 4, and the weight of the bulldozer blade tends to drag the telescopic rod of the oil cylinder to move downward quickly. When the blade descends at a certain speed, the return oil in the rod chamber forms a pressure difference above and below the throttling section. When its force resists the force of the spring 23, the valve sleeve 21 and the valve core 22 are pushed upward. Then the regulating groove 211 of the valve sleeve 21 is connected with the rodless chamber oil channel 3, so that the rodless chamber oil channel 3 is connected with the rod chamber oil channel 5. At this time, all the oil in the rod chamber is replenished to the rodless chamber to make up for the shortage of pump oil, so that the blade can descend quickly and obtain a higher speed before the blade cuts the soil.
[0031] like Figure 3 As shown, specifically, the housing 1 is provided with a valve cover 11, a valve body 12 and a base 13 which are sequentially arranged from top to bottom and detachably connected;
[0032] The valve cover 11 is provided with a rodless chamber hydraulic pressure regulating port 111 communicating with the rodless chamber oil passage 3, and the rodless chamber hydraulic pressure regulating port 111 is used to connect with a hydraulic system for regulating the flow direction of the oil inside the housing 1;
[0033] A hydraulic regulating port 112 communicated with the hydraulic regulating oil passage 4, the hydraulic regulating port 112 being used to connect with a hydraulic system for regulating the flow direction of the oil inside the housing 1;
[0034] A rod chamber communication port 113 communicated with the rod chamber oil passage 5, the rod chamber communication port 113 is used to communicate with the rod chamber of the oil cylinder;
[0035] A rodless chamber communication port 121 communicating with the rodless chamber oil passage 3 is formed on the outer wall of the valve body 12 near the end of the rodless chamber oil passage 3 . The rodless chamber communication port 121 is used to communicate with the rodless chamber of the oil cylinder.
[0036] The utility model adopts the above design, so that the housing 1 is divided into three parts, and each part is provided with a connecting port with the rodless chamber, the rod chamber and the hydraulic system of the oil cylinder, so as to facilitate quick installation and disassembly, and facilitate cleaning and maintenance at a later time.
[0037] Specifically, the valve cover 11 and the valve body 12 are tightly connected via positioning pins, and the valve body 12 and the base 13 are tightly connected via positioning pins.
[0038] The utility model ensures the overall stability of the equipment and ensures good working conditions of the bulldozer through the above design.
[0039] Specifically, a throttling section is provided in the hydraulic regulating oil passage 4, a throttling sleeve 42 is provided above the throttling section, and the throttling sleeve 42 is provided with a vertical throttling hole corresponding to the throttling section and a horizontal oil hole corresponding to the oil passage A6.
[0040] The utility model can more accurately control the flow rate in the hydraulic regulating oil channel 4 through the above-mentioned design, thereby accurately controlling the fast and slow descent of the bulldozer blade.
[0041] Specifically, the housing 1 is provided with a plurality of mounting holes 14 which penetrate the housing 1 transversely.
[0042] The utility model facilitates the fixing and connection of the housing 1 with other devices through the above design.
[0043] Specifically, a process hole 15 is provided on one side of the housing 1 close to the hydraulic regulating oil passage 4 , and the process hole 15 is blocked with a screw plug.
[0044] The utility model facilitates the processing of the valve cavity 2 inside the housing 1 through the above-mentioned design, while ensuring the sealing performance of the equipment.
[0045] Specifically, a plurality of flow grooves 24 are provided on the inner wall of the valve chamber 2 .
[0046] The utility model ensures good circulation and flow of the oil inside the valve cavity 2 through the above design.
[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A quick-drop valve device suitable for a bulldozer cylinder, characterized in that: The invention comprises a housing (1), wherein a valve chamber (2) is provided in the housing (1), and a rodless chamber oil passage (3) and a hydraulic regulating oil passage (4) are respectively provided on both sides of the valve chamber (2), the rodless chamber oil passage (3) is connected to the valve chamber (2) via a fast regulating chamber (31), the hydraulic regulating oil passage (4) is connected to the valve chamber (2) via a slow regulating chamber (41), the fast regulating chamber (31) is located above the slow regulating chamber (41), the housing (1) is further provided with a rod chamber oil passage (5) connected to the slow regulating chamber (41), and the upper part of the valve chamber (2) is further connected to the hydraulic regulating oil passage (4) via an oil passage A (6); A valve sleeve (21) is slidably disposed in the valve cavity (2), a valve core (22) is disposed in the valve sleeve (21), the valve core (22) is provided with a spring (23) for pressing the valve core (22) and the valve sleeve (21), the valve sleeve (21) is provided with an adjusting groove (211), the adjusting groove (211) is provided with an oil passage B (212) penetrating downwardly through the valve sleeve (21), the valve sleeve (21) is provided with an oil passage A (213), and the valve core (22) is provided with an oil passage B (221).
2. The quick-drop valve device for a bulldozer cylinder according to claim 1, characterized in that: The housing (1) is provided with a valve cover (11), a valve body (12) and a base (13) which are arranged in sequence from top to bottom and are detachably connected; The valve cover (11) is provided with a rodless chamber hydraulic pressure regulating port (111) which is in communication with the rodless chamber oil passage (3); the rodless chamber hydraulic pressure regulating port (111) is used to be connected to a hydraulic system for regulating the flow direction of oil inside the housing (1); A hydraulic regulating port (112) communicated with the hydraulic regulating oil passage (4), the hydraulic regulating port (112) being used to connect to a hydraulic system for regulating the flow direction of oil inside the housing (1); A rod chamber communication port (113) communicated with the rod chamber oil passage (5), the rod chamber communication port (113) being used to communicate with the rod chamber of the oil cylinder; A rodless chamber communication port (121) communicating with the rodless chamber oil passage (3) is provided on the outer wall of the valve body (12) near the end of the rodless chamber oil passage (3). The rodless chamber communication port (121) is used to communicate with the rodless chamber of the oil cylinder.
3. The quick-drop valve device for a bulldozer cylinder according to claim 1, characterized in that: The valve cover (11) and the valve body (12) are tightly connected via positioning pins, and the valve body (12) and the base (13) are tightly connected via positioning pins.
4. The quick-drop valve device for a bulldozer cylinder according to claim 1, characterized in that: The hydraulic regulating oil passage (4) is provided with a throttling section, a throttling sleeve (42) is provided above the throttling section, and the throttling sleeve (42) is provided with a vertical throttling hole corresponding to the throttling section and a horizontal oil hole corresponding to the oil passage A (6).
5. The quick-drop valve device for a bulldozer cylinder according to claim 1, characterized in that: The shell (1) is provided with a plurality of mounting holes (14) which penetrate the shell (1) transversely.
6. The quick-drop valve device for a bulldozer cylinder according to claim 1, characterized in that: A process hole (15) is provided on one side of the housing (1) close to the hydraulic regulating oil passage (4), and the process hole (15) is blocked with a screw plug.
7. The quick-drop valve device for a bulldozer cylinder according to claim 1, characterized in that: The inner wall of the valve cavity (2) is provided with a plurality of flow grooves (24).