A load sensing system filling valve and tractor
By designing a load-sensitive system filling valve in the hydraulic system of a high-horsepower tractor and using priority valves to control the pump load during engine startup, the problems of large load and energy waste during engine startup are solved, and easy start and efficient operation are achieved.
Patent Information
- Application Number
- CN202411282419.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2044-09-13
AI Technical Summary
The hydraulic system of a high-horsepower tractor is loaded when the engine starts, resulting in the problem of difficulty in starting. The prior art solves the problem by adding quantitative gear pumps, but this solution has increased energy waste and complexity.
Design a load-sensitive system liquid filling valve, including a hydraulically controlled reversing valve, an electromagnetic reversing valve and a priority valve. The load of the pump when the engine starts is controlled through the priority valve, ensuring that the engine is easy to start, and cutting off the pressure after the engine starts, avoiding Energy wasted.
It realizes no-load start when the engine starts, solves the problems of waste of energy and difficulty in starting the hydraulic system, simplifies system design, and improves startup convenience.
Smart Images
Figure CN118793659B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of tractors, and in particular to a load sensing system filling valve and a tractor. Background Art
[0002] At present, the hydraulic system of tractors is becoming more and more complex, and the requirements for the braking system of tractors are also getting higher and higher. In particular, the hydraulic system of high-horsepower tractors is no longer a simple quantitative system, but a load-sensitive variable system. In the hydraulic variable system of tractors, most of the braking design schemes are to add an additional quantitative gear pump to provide a power source for braking, but this scheme has the problem of difficulty in starting due to the large load when the engine is started. Summary of the invention
[0003] The invention provides a load sensing system filling valve and a tractor, aiming to solve the problems in the prior art.
[0004] The technical solution of the present invention to solve the above technical problems is as follows:
[0005] A load-sensitive system filling valve, comprising a hydraulically controlled reversing valve, an electromagnetic reversing valve and a priority valve, wherein the priority valve is provided with oil port one, oil port two and oil port three, and the oil port one can be connected to the oil port two or the oil port three; the oil port one is connected to one end of the P pipeline, and the spring interface of the priority valve is connected to one end of the LS pipeline; the oil port three is connected to one end of the filling pipeline, and the other end of the filling pipeline is respectively connected to one end of the A1 pipeline and one end of the A2 pipeline; the A1 pipeline is connected to one end of the F1 pipeline, and the A2 pipeline is connected to one end of the F2 pipeline; the hydraulically controlled reversing valve is provided with oil port four, oil port five and oil port six, and the oil port four can be connected to the oil port five or the oil port six ; The solenoid reversing valve is provided with oil port seven, oil port eight and oil port nine, and the oil port seven can be connected with the oil port eight or the oil port nine; the oil port four is connected with the oil port nine through pipeline one, and the spring interface of the hydraulically controlled reversing valve is connected with the pipeline one through a pipeline; the oil port six is connected with the oil port seven through pipeline two, and the oil port eight is connected with the LS pipeline through pipeline three; the valve core interface at one end of the hydraulically controlled reversing valve is connected with the pipeline two through a pipeline, and the valve core interface at the other end is connected with the MA pipeline through a pipeline, and one end of the MA pipeline is connected with the filling pipeline; the oil port five is connected with one end of the T pipeline, and the T pipeline is respectively connected with the pipeline one and the filling pipeline.
[0006] The beneficial effects of the present invention are as follows: when the engine is started, the electromagnetic reversing valve is energized, and the pumped oil reaches the A1 pipeline, the A2 pipeline, the F1 pipeline and the F2 pipeline through the priority valve. At this time, the pump has no output when the engine is started, so the pump is started without load and is very easy to start;
[0007] After the engine is started, the solenoid valve loses power and the hydraulic pressure moves as follows: Figure 3 The pumped oil reaches the A1 pipeline, A2 pipeline, F1 pipeline and F2 pipeline through the priority valve. At this time, the solenoid reversing valve loses power, so the A1 pipeline and A2 pipeline will continue to be filled with fluid until the pressure is cut off.
[0008] The filling valve provided by the present invention has a priority valve function, which can control the load of the pump when the engine is started, making it very easy to start the vehicle, solving the energy waste design of multiple pumps in the hydraulic system, and solving the problem of heavy load and difficulty in starting the engine when starting.
[0009] Based on the above technical solution, the present invention can also be improved as follows.
[0010] Furthermore, it also includes a shuttle valve, on which are provided an interface 1, an interface 2 and an interface 3 which are interconnected; the shuttle valve is fixedly installed on the pipeline 3, on which the interface 1 and the interface 2 are respectively connected to the two ends of the fracture on the pipeline 3, and the interface 3 is connected to one end of the LS' pipeline; the oil port 3 is connected to one end of the S pipeline.
[0011] The beneficial effect of adopting the above further solution is that when the engine is started, the electromagnetic reversing valve is energized, and the pumped oil reaches the A1 pipeline, the A2 pipeline, the F1 pipeline and the F2 pipeline through the priority valve. At this time, because the LS pressure is connected to the T pipeline, the LS pressure is 0, so the pump has no output when the engine is started, so the pump is started without load and is very easy to start;
[0012] After the engine is started, the solenoid valve loses power and the hydraulic pressure moves as follows: Figure 3 The pumped oil reaches the A1 pipeline, A2 pipeline, F1 pipeline and F2 pipeline through the priority valve. At this time, the solenoid reversing valve loses power, so the LS pressure signal is transmitted to the shuttle valve and then connected to the LS of the pump. Therefore, the A1 pipeline and A2 pipeline will be filled with liquid until the pressure is cut off.
[0013] Furthermore, the valve core interface of the priority valve is connected to the liquid filling pipeline through pipeline four.
[0014] The beneficial effects of adopting the above further solution are simple structure and reasonable design. Pipeline 4 can be used to enable the oil to push the valve core of the priority valve to move so as to achieve corresponding operations.
[0015] Furthermore, a flow valve 1 is fixedly installed on the pipeline 4.
[0016] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and the flow rate of the oil in the pipeline four can be detected by using the flow valve one, which makes the detection convenient.
[0017] Furthermore, a second flow valve is fixedly installed on the liquid filling pipeline near the connection point between the T pipeline and the liquid filling pipeline.
[0018] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and the flow rate of the oil in the filling pipeline can be detected by using the second flow valve, which makes the detection convenient.
[0019] Furthermore, a one-way valve is fixedly installed on the liquid filling pipeline at a position corresponding to the connection point between the T pipeline and the liquid filling pipeline and the connection point between the MA pipeline and the liquid filling pipeline.
[0020] The beneficial effects of adopting the above further solution are simple structure and reasonable design, and the one-way valve can be used to ensure that the oil in the A1 pipeline and the A2 pipeline can only flow in one direction.
[0021] Furthermore, a reverse shuttle valve 1 is fixedly installed on the A1 pipeline at a position between the connecting point between the F1 pipeline and the A1 pipeline and the other end of the filling pipeline.
[0022] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and using the reverse shuttle valve to control the pressure in the A1 pipeline and the A2 pipeline to be equal.
[0023] Furthermore, a second reverse shuttle valve is fixedly installed on the A2 pipeline at a position between the connecting point between the F2 pipeline and the A2 pipeline and the other end of the filling pipeline.
[0024] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and using the reverse shuttle valve 2 to control the pressure in the A1 pipeline and the A2 pipeline to be equal.
[0025] Furthermore, an overflow valve is fixedly installed on the T pipeline at a position corresponding to the connection point between it and the filling pipeline and the connection point between it and the pipeline.
[0026] The beneficial effects of adopting the above further scheme are simple structure, reasonable design, and utilizing the overflow valve to control the maximum stress in the A1 pipeline and the A2 pipeline, thereby avoiding excessive pressure in the A1 pipeline and the A2 pipeline and ensuring safe operation of the entire system.
[0027] The present invention also relates to a tractor, comprising the load sensing system filling valve as described above.
[0028] The beneficial effect of adopting the above further scheme is that the present invention also provides a tractor, in which the filling valve involved has a priority valve function, which can control the load of the pump when the engine is started, making it very easy to start the vehicle, solving the energy waste design of multiple pumps in the hydraulic system, and at the same time solving the problem of heavy load and difficult starting when the engine is started. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a schematic diagram of the overall principle structure of the present invention;
[0030] Figure 2 It is a schematic diagram of the principle structure of the generator when starting in the present invention;
[0031] Figure 3 It is a schematic diagram of the principle structure of the present invention when filling with liquid.
[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0033] 1. Hydraulic control reversing valve; 2. Solenoid reversing valve; 3. Priority valve; 4. P pipeline; 5. LS pipeline; 6. Filling pipeline; 7. A1 pipeline; 8. A2 pipeline; 9. F1 pipeline; 10. F2 pipeline; 11. Pipeline 1; 12. Pipeline 2; 13. MA pipeline; 14. Pipeline 3; 15. Pipeline 4; 16. T pipeline; 17. Shuttle valve; 18. LS' pipeline; 19. S pipeline; 20. Flow valve 1; 21. Flow valve 2; 22. Check valve; 23. Reverse shuttle valve 1; 24. Reverse shuttle valve 2; 25. Overflow valve. DETAILED DESCRIPTION
[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.
[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0037] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.
[0038] Example 1
[0039] like Figures 1 to 3 As shown, this embodiment provides a load-sensitive system filling valve, including a hydraulically controlled reversing valve 1, an electromagnetic reversing valve 2 and a priority valve 3, wherein the priority valve 3 is provided with an oil port 1 (port a in the figure), an oil port 2 (port b in the figure) and an oil port 3 (port c in the figure), wherein the oil port 1 can be connected to the oil port 2 or the oil port 3; the oil port 1 is connected to one end of the P pipeline 4, and the spring interface of the priority valve 3 is connected to one end of the LS pipeline 5; the oil port 3 is connected to one end of the filling pipeline 6, and the other end of the filling pipeline 6 is respectively connected to one end of the A1 pipeline 7 and one end of the A2 pipeline 8; the A1 pipeline 7 is connected to one end of the F1 pipeline 9, and the A2 pipeline 8 is connected to one end of the F2 pipeline 10; the hydraulically controlled reversing valve 1 is provided with an oil port 4 (port d in the figure), an oil port 5 (port e in the figure) and an oil port 6 (port f in the figure), wherein the oil port 4 can be connected to the The oil port five or the oil port six is connected; the solenoid reversing valve 2 is provided with an oil port seven (g port in the figure), an oil port eight (h port in the figure) and an oil port nine (i port in the figure), and the oil port seven can be connected with the oil port eight or the oil port nine; the oil port four is connected with the oil port nine through a pipeline one 11, and the spring interface of the hydraulic control reversing valve 1 is connected with the pipeline one 11 through a pipeline; the oil port six is connected with the oil port seven through a pipeline two 12, and the oil port eight is connected with the LS pipeline 5 through a pipeline three 14; the valve core interface at one end of the hydraulic control reversing valve 1 is connected with the pipeline two 12 through a pipeline, and the valve core interface at the other end is connected with the MA pipeline 13 through a pipeline, and one end of the MA pipeline 13 is connected with the filling pipeline 6; the oil port five is connected with one end of the T pipeline 16, and the T pipeline 16 is respectively connected with the pipeline one 11 and the filling pipeline 6.
[0040] When the engine starts, the solenoid reversing valve is energized, and the pumped oil reaches the A1 pipeline, A2 pipeline, F1 pipeline and F2 pipeline through the priority valve. At this time, the pump has no output when the engine starts, so the pump starts without load and is very easy to start;
[0041] After the engine is started, the solenoid valve loses power and the hydraulic pressure moves as follows: Figure 3 The pumped oil reaches the A1 pipeline, A2 pipeline, F1 pipeline and F2 pipeline through the priority valve. At this time, the solenoid reversing valve loses power, so the A1 pipeline and A2 pipeline will continue to be filled with fluid until the pressure is cut off.
[0042] Preferably, in this embodiment, the hydraulically controlled reversing valve 1 is preferably a two-position three-way hydraulically controlled reversing valve.
[0043] Preferably, in this embodiment, the electromagnetic reversing valve 2 is preferably a two-position three-way electromagnetic reversing valve.
[0044] It should be noted that the hydraulically controlled reversing valve 1 , the electromagnetic reversing valve 2 and the priority valve 3 respectively adopt the existing technologies, and their specific structures and principles are not described in detail here.
[0045] Based on the above solution, the other end of the A1 pipeline is used to connect to accumulator one, and the other end of the A2 pipeline is used to connect to accumulator two.
[0046] In addition, the other end of the F1 pipeline is used to connect to the rear axle control valve, and the other end of the F2 pipeline is used to connect to the front axle control valve.
[0047] The other end of the P pipeline 4 is connected to the pressure oil port of the plunger pump.
[0048] The other end of the MA pipeline 13 is used for pressure detection.
[0049] The filling valve provided in this embodiment has a priority valve function, which can control the load of the pump when the engine is started, making it very easy to start the vehicle, solving the energy waste design of multiple pumps in the hydraulic system, and at the same time solving the problem of heavy load and difficulty in starting the engine when starting.
[0050] Example 2
[0051] On the basis of Example 1, this embodiment also includes a shuttle valve 17, on which are provided an interface 1, an interface 2 and an interface 3 which are interconnected; the shuttle valve 17 is fixedly mounted on the pipeline 3 14, on which the interface 1 and the interface 2 are respectively connected to the two ends of the break on the pipeline 3 14, and the interface 3 is connected to one end of the LS' pipeline 18; the oil port 3 is connected to one end of the S pipeline 19.
[0052] When the engine starts, the electromagnetic reversing valve 2 is energized, and the pumped oil reaches the A1 pipeline 7, A2 pipeline 8, F1 pipeline 9 and F2 pipeline 10 through the priority valve. At this time, because the LS pressure is connected to the T pipeline 16, the LS pressure is 0. Therefore, the pump has no output when the engine starts, so the pump starts without load and is very easy to start;
[0053] After the engine is started, the solenoid valve 2 loses power and the hydraulic pressure moves as follows Figure 3 The pumped oil reaches A1 pipeline 7, A2 pipeline 8, F1 pipeline 9 and F2 pipeline 10 through the priority valve. At this time, the solenoid reversing valve 2 loses power, so the LS pressure signal is transmitted to the shuttle valve and then connected to the LS of the pump. Therefore, A1 pipeline 7 and A2 pipeline 8 will be filled with liquid until the pressure is cut off.
[0054] Based on the above scheme, the other end of the LS pipeline 5 is connected to the LS port of the pump, the other end of the LS' pipeline 18 is connected to the LS port of other circuits, the other end of the S pipeline 19 is connected to the pressure oil port of other circuits, and the other end of the T pipeline 16 is connected to the oil return tank.
[0055] Example 3
[0056] On the basis of the above embodiments, in this embodiment, the valve core interface of the priority valve 3 is connected to the liquid filling pipeline 6 through the pipeline 4 15.
[0057] This solution has a simple structure and a reasonable design. By using the pipeline 4 15, the oil can push the valve core of the priority valve 3 to move so as to achieve the corresponding operation.
[0058] Example 4
[0059] On the basis of Example 3, in this embodiment, a flow valve 20 is fixedly installed on the pipeline 4 15.
[0060] The scheme has a simple structure and a reasonable design. The flow rate of the oil in the pipeline 4 15 can be detected by using the flow valve 1 20, and the detection is convenient.
[0061] Example 5
[0062] On the basis of the above embodiments, in this embodiment, a flow valve 21 is fixedly installed on the liquid filling pipeline 6 near the connection point between the T pipeline 16 and the liquid filling pipeline 6 .
[0063] This solution has a simple structure and a reasonable design. The flow rate of the oil in the filling pipeline 6 can be detected by using the flow valve 21, and the detection is convenient.
[0064] Example 6
[0065] On the basis of the above embodiments, in this embodiment, a one-way valve 22 is fixedly installed on the filling pipeline 6 at a position corresponding to the connection between the T pipeline 16 and the filling pipeline 6 and the connection between the MA pipeline 13 and the filling pipeline 6.
[0066] This solution has a simple structure and a reasonable design. The one-way valve 22 can be used to ensure that the oil in the A1 pipeline 7 and the A2 pipeline 8 can only flow in one direction.
[0067] Example 7
[0068] On the basis of the above embodiments, in this embodiment, a reverse shuttle valve 23 is fixedly installed on the A1 pipeline 7 at a position between the connecting point between the F1 pipeline 9 and the A1 pipeline 7 and the other end of the filling pipeline 6.
[0069] This solution has a simple structure and a reasonable design, and uses a reverse shuttle valve 23 to control the pressures in the A1 pipeline 7 and the A2 pipeline 8 to be equal.
[0070] Example 8
[0071] On the basis of the above embodiments, in this embodiment, a second reverse shuttle valve 24 is fixedly installed on the A2 pipeline 8 at a position between the connecting point between the F2 pipeline 10 and the A2 pipeline 8 and the other end of the filling pipeline 6 .
[0072] This solution has a simple structure and a reasonable design, and uses a reverse shuttle valve 24 to control the pressures in the A1 pipeline 7 and the A2 pipeline 8 to be equal.
[0073] Example 9
[0074] On the basis of the above embodiments, in this embodiment, an overflow valve 25 is fixedly installed on the T-pipeline 16 at a position corresponding to the connection between the T-pipeline 16 and the filling pipe 6 and the connection between the T-pipeline 16 and the pipe 11.
[0075] This solution has a simple structure and a reasonable design. The overflow valve 25 is used to control the maximum stress in the A1 pipeline 7 and the A2 pipeline 8 to avoid excessive pressure in the A1 pipeline 7 and the A2 pipeline 8, thereby ensuring the safe operation of the entire system.
[0076] Example 10
[0077] On the basis of the above embodiments, this embodiment further provides a tractor, comprising the load sensing system filling valve as described above.
[0078] This embodiment also provides a tractor, in which the filling valve involved has a priority valve function, which can control the load of the pump when the engine is started, making it very easy to start the vehicle, solving the energy waste design of multiple pumps in the hydraulic system, and solving the problem of heavy load and difficulty in starting the engine when starting.
[0079] The working principle of the present invention is as follows:
[0080] When the engine starts, the electromagnetic reversing valve 2 is energized, and the pumped oil reaches the A1 pipeline 7, A2 pipeline 8, F1 pipeline 9 and F2 pipeline 10 through the priority valve. At this time, because the LS pressure is connected to the T pipeline 16, the LS pressure is 0. Therefore, the pump has no output when the engine starts, so the pump starts without load and is very easy to start;
[0081] After the engine is started, the solenoid valve 2 loses power and the hydraulic pressure moves as follows Figure 3 The pumped oil reaches A1 pipeline 7, A2 pipeline 8, F1 pipeline 9 and F2 pipeline 10 through the priority valve. At this time, the solenoid reversing valve 2 loses power, so the LS pressure signal is transmitted to the shuttle valve and then connected to the LS of the pump. Therefore, A1 pipeline 7 and A2 pipeline 8 will be filled with liquid until the pressure is cut off.
[0082] It should be noted that the dotted frame in the drawings merely indicates that the components within the dotted frame form a valve block and has no other substantial meaning.
[0083] The advantages of the present invention are as follows:
[0084] 1. The present invention solves the energy waste design of multiple pumps in the hydraulic system;
[0085] 2. The present invention solves the problem of heavy load and difficulty in starting the engine when starting.
[0086] It should be noted that all electronic components involved in the present invention adopt existing technologies.
[0087] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0088] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
[0089] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A load-sensing system filling valve, characterized in that: The invention comprises a hydraulically controlled reversing valve (1), an electromagnetic reversing valve (2) and a priority valve (3), wherein the priority valve (3) is provided with an oil port 1, an oil port 2 and an oil port 3, wherein the oil port 1 can be connected to the oil port 2 or the oil port 3; the oil port 1 is connected to one end of a P pipeline (4), and a spring interface of the priority valve (3) is connected to one end of an LS pipeline (5); the oil port 3 is connected to one end of a filling pipeline (6), and the other end of the filling pipeline (6) is respectively connected to one end of an A1 pipeline (7) and one end of an A2 pipeline (8); the A1 pipeline (7) is connected to one end of an F1 pipeline (9), and the A2 pipeline (8) is connected to one end of an F2 pipeline (10); the hydraulically controlled reversing valve (1) is provided with an oil port 4, an oil port 5 and an oil port 6, wherein the oil port 4 can be connected to the oil port 5 or the oil port 6; the electromagnetic reversing valve (2) An oil port 7, an oil port 8 and an oil port 9 are provided on the valve body, and the oil port 7 can be connected to the oil port 8 or the oil port 9; the oil port 4 is connected to the oil port 9 through the pipeline 1 (11), and the spring interface of the hydraulic control reversing valve (1) is connected to the pipeline 1 (11) through the pipeline; the oil port 6 is connected to the oil port 7 through the pipeline 2 (12), and the oil port 8 is connected to the LS pipeline (5) through the pipeline 3 (14); the valve core interface at one end of the hydraulic control reversing valve (1) is connected to the pipeline 2 (12) through the pipeline, and the valve core interface at the other end is connected to the MA pipeline (13) through the pipeline, and one end of the MA pipeline (13) is connected to the filling pipeline (6); the oil port 5 is connected to one end of the T pipeline (16), and the T pipeline (16) is connected to the pipeline 1 (11) and the filling pipeline (6) respectively; It also includes a shuttle valve (17), the shuttle valve (17) being provided with a first interface and a second interface which are interconnected. and interface three; the shuttle valve (17) is fixedly mounted on the pipeline three (14), and the interface one and the interface two thereon are respectively connected to the two ends of the fracture on the pipeline three (14), and the interface three is connected to one end of the LS' pipeline (18); the oil port three is connected to one end of the S pipeline (19).
2. The load sensing system filling valve according to claim 1, characterized in that: The valve core interface of the priority valve (3) is connected to the liquid filling pipeline (6) through pipeline four (15).
3. The load sensing system filling valve according to claim 2, characterized in that: A flow valve 1 (20) is fixedly installed on the pipeline 4 (15).
4. The load sensing system filling valve according to any one of claims 1 to 3, characterized in that: A second flow valve (21) is fixedly mounted on the liquid filling pipeline (6) at a location close to the connection point between the T pipeline (16) and the liquid filling pipeline (6).
5. The load sensing system filling valve according to any one of claims 1 to 3, characterized in that: A one-way valve (22) is fixedly installed on the liquid filling pipeline (6) at a location between the connection point between the T pipeline (16) and the liquid filling pipeline (6) and the connection point between the MA pipeline (13) and the liquid filling pipeline (6).
6. The load sensing system filling valve according to any one of claims 1 to 3, characterized in that: A reverse shuttle valve 1 (23) is fixedly installed on the A1 pipeline (7) at a location between the connection point between the F1 pipeline (9) and the A1 pipeline (7) and the other end of the filling pipeline (6).
7. The load sensing system filling valve according to any one of claims 1 to 3, characterized in that: A second reverse shuttle valve (24) is fixedly installed on the A2 pipeline (8) at a location between the connection point between the F2 pipeline (10) and the A2 pipeline (8) and the other end of the filling pipeline (6).
8. The load sensing system filling valve according to any one of claims 1 to 3, characterized in that: An overflow valve (25) is fixedly mounted on the T-pipeline (16) at a location between the connection point between the T-pipeline (16) and the connection point between the T-pipeline (16) and the first pipe (11).
9. A tractor, characterized in that: It comprises a load sensing system filling valve as described in any one of claims 1-8.
Citation Information
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CN113738728A
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