A multi-way valve assembly with a first joint capable of flow regulation

Abstract

The application discloses a primary connection multi-way valve assembly capable of flow regulation, which comprises a screw plug, a flow regulation valve body and the like. The screw plug is screwed into the leftmost end of an oil channel of the primary connection. A flow regulation spring is arranged at the right side of the flow regulation valve body. The flow regulation spring pushes the flow regulation valve body to the left end of the screw plug under the action of the flow regulation spring. The flow regulation valve body is internally provided with a flow regulation valve core. The right side of the flow regulation spring falls on a flow regulation spring seat. The right side of the flow regulation spring seat is abutted against the left end of a flow regulation connecting seat. The flow regulation connecting seat is screwed into a flow regulation valve seat. The flow regulation valve seat is screwed into the right side of the oil channel. The flow regulation valve seat is connected with an adjusting mechanism for adjusting the flow. The adjusting mechanism comprises a flow regulation rod positioned on the flow regulation valve seat. The flow regulation rod is connected with the flow regulation connecting seat through a cylindrical pin. The distance between the flow regulation connecting seat and the oil channel of the primary connection shell is changed by rotating the flow regulation rod, so that the variable throttling port is adjusted.

Description

Technical Field

[0001] This invention relates to the field of tractor technology, and more precisely, to a multi-way valve assembly with flow regulation capability. Background Technology

[0002] Currently, in the hydraulic systems of various models of large and medium-power wheeled tractors produced domestically, the required single-piece output flow rate of the hydraulic system is increasing. However, the first-joint hydraulic system often requires a stable flow rate to meet the stable operating requirements of the hydraulic lifting system. Unfortunately, the single-piece hydraulic output flow rate of mechanical multi-way valves produced by domestic manufacturers is fixed and cannot be adjusted. Summary of the Invention

[0003] To solve the above problems, this invention proposes a multi-way valve assembly with flow regulation in the first connection, which has a simple structure, reliable use, and easy operation.

[0004] This invention is achieved through the following technical solution: A multi-way valve assembly with flow regulation in the first section, the first section including a plug, a flow regulating valve body, a flow regulating spring, a flow regulating spring seat, a flow regulating connecting seat, a flow regulating valve seat, a check valve, a first section main valve core, a first section housing, and a safety valve assembly; The plug is screwed into the leftmost end of the first oil passage. The flow regulating spring is located on the right side of the flow regulating valve body. Under the action of the flow regulating spring, the flow regulating valve body is pushed to the left end of the plug. The flow regulating valve body is equipped with a flow regulating valve core. The right side of the flow regulating spring rests on the flow regulating spring seat, the right side of the flow regulating spring seat abuts against the left end of the flow regulating connector, the flow regulating connector is screwed into the flow regulating valve seat, and the flow regulating valve seat is screwed into the right side of this oil passage. The flow regulating valve seat is connected to a regulating mechanism for regulating flow. The regulating mechanism includes a flow regulating rod positioned on the flow regulating valve seat. The flow regulating rod is connected to the flow regulating connecting seat via a cylindrical pin. The variable throttle port is adjusted by rotating the flow regulating rod to change the distance between the flow regulating connecting seat and the oil passage of the first coupling housing.

[0005] Furthermore, the flow regulating valve core is connected to an elastic retaining ring for limiting the displacement of the flow regulating valve core.

[0006] Furthermore, the flow regulating rod is positioned on the flow regulating valve seat by a flow regulating washer and a retaining ring to prevent the flow regulating rod from moving left or right.

[0007] Furthermore, the flow regulating valve seat is sealed to the first housing by an O-ring.

[0008] Furthermore, the safety valve assembly is screwed into the oil passage of the first housing by threads and sealed to the first housing by a seal.

[0009] Furthermore, the first main valve core is inserted into the first housing oil passage.

[0010] Furthermore, the multi-way valve assembly includes chambers A1 and B1 disposed in the valve body, the one-way valve is located between chambers A1 and B1, and a one-way valve spring is disposed inside the one-way valve.

[0011] Furthermore, the first connection's oil circuit is divided into 5 oil circuits, specifically including: Oil circuit I is supplied by the oil pump; it enters the first coupling housing through the oil inlet P, and then enters the front end of the flow regulating connector through the oil passage inside the first coupling housing; at the same time, it enters the valve port of the first coupling main valve core through the oil passage inside the first coupling housing; and at the same time, it enters the inlet of the safety valve assembly through the oil passage inside the first coupling housing. Oil circuit II: After passing through the variable throttle orifice, oil circuit I enters the flow regulating spring chamber on the right side of the flow regulating valve body through the flow regulating connector. At the same time, oil circuit II can push open the check valve through the oil passage in the first connecting housing and enter the left and right valve ports of the first connecting main valve core. Oil circuit III: The first connection passes through the main valve core of the first connection to the multi-way valve oil circuit of the next connection; Oil circuit IV: Oil circuit II pushes open the check valve to enter the oil at the left and right valve ports of the first main valve core; Oil circuit V: After the flow regulating valve body inside the first section moves to the right, it communicates with oil circuit I to enter the next section of the multi-way valve oil.

[0012] The beneficial effects of this invention are as follows: This invention prioritizes the supply of flow to the first port of the multi-way valve by coordinating the differential relief valve and the variable throttle orifice within the first port of the multi-way valve. At the same time, by adjusting the opening of the throttle valve, it meets the stable hydraulic output flow requirements of different tractor hydraulic lifting systems. Excess flow enters other valve plates of the multi-way valve to perform other tasks. Attached Figure Description Figure 1 This is a schematic diagram of the multi-way valve assembly of the present invention; Figure 2 yes Figure 1 AA section view; Figure 3 This is a schematic diagram of the other side of the multi-way valve assembly of the present invention; Figure 4 yes Figure 3 BB cross-sectional view; Figure 5 yes Figure 3 CC section view; Figure 6 This is a system schematic diagram of the first connection in the middle position state of the present invention; Figure 7 This is a system schematic diagram of the first-connection lifting state of the present invention; Figure 8 This is a schematic diagram of the system in the initial descent state of the present invention; Reference numerals: 1. Plug; 2. Flow regulating valve body; 3. Orifice elastic retaining ring; 4. Flow regulating valve core; 5. Flow regulating spring; 6. Flow regulating spring seat; 7. Flow regulating connecting seat; 8. Cylindrical pin; 9. O-ring; 10. Flow regulating washer; 11. Flow regulating valve seat; 12. Retaining ring; 13. Flow regulating rod; 14. Check valve spring; 15. Check valve; 16. Valve body end face sealing ring; 17. First-connect main valve core; 18. First-connect housing; 19. Safety valve assembly; 20. Oil circuit I; 21. Oil circuit II; 22. Oil circuit III; 23. Oil circuit IV; 24. Oil circuit V; 25. Variable throttle orifice; 26. Damping orifice. Detailed Implementation

[0013] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0014] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0015] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0016] Example 1 like Figure 1As shown, a multi-way valve assembly with flow regulation capability in the first connection mainly includes: a plug 1, a flow regulating valve body 2, an elastic retaining ring for the orifice 3, a flow regulating valve core 4, a flow regulating spring 5, a flow regulating spring seat 6, a flow regulating connecting seat 7, a cylindrical pin 8, an O-ring 9, a flow regulating washer 10, a flow regulating valve seat 11, a retaining ring 12, a flow regulating rod 13, a one-way valve spring 14, a one-way valve 15, a valve body end face sealing ring 16, a first-connection main valve core 17, a first-connection housing 18, a safety valve assembly 19, etc. A multi-way valve assembly with flow regulation in the first section, wherein the main valve core 17 of the first section is inserted into the oil passage of the first section housing 18 in the same way as the valve cores of other multi-way valves, which will not be described in detail. The valve body end face sealing ring 16 ensures the sealed connection between the multi-way valve assembly and the valve plates of the other multi-way valves.

[0017] On another oil passage of the first housing 18, a plug 1 is screwed into the leftmost end of the oil passage. The flow regulating valve body 2, under the action of the flow regulating spring 5 on the right side, pushes it to the left end of the plug 1. A flow regulating valve core 4 is arranged inside the flow regulating valve body 2, and an elastic retaining ring 3 restricts the displacement of the flow regulating valve body 2. A flow regulating spring 5 is located on the right side of the flow regulating valve body 2. The right side of the flow regulating spring 5 rests on a flow regulating spring seat 6, and the right side of the flow regulating spring seat 6 abuts against the left end of the flow regulating connecting seat 7. The flow regulating connecting seat 7 is screwed into the flow regulating valve seat 11. The flow regulating valve seat 11 is screwed into the right side of this oil passage, and the flow regulating valve seat 11 is sealed to the first housing 18 by an O-ring 9. The flow regulating rod 13 is positioned on the flow regulating valve seat 11 by the flow regulating washer 10 and the retaining ring 12 to prevent left and right movement of the flow regulating rod 13. Simultaneously, the flow regulating connecting seat 7 and the flow regulating rod 13 are connected together by the cylindrical pin 8, allowing the distance between the flow regulating connecting seat 7 and the flow regulating valve body 2 to be changed by rotating the flow regulating rod 13. The flow regulating rod 13 and the flow regulating valve seat 11 are sealed by O-rings. The safety valve assembly 19 passes through the threaded first coupling housing oil passage and is sealed to the first coupling housing by a seal.

[0018] In the initial neutral position, the tractor has no hydraulic output requirement in the initial connection, and the main valve core 17 of the multi-way valve is not operated. The system principle is as follows: Figure 6 As shown, at this time, after the oil from the oil pump enters the first housing 18, it splits into four paths: one path enters the oil inlet chamber of the safety valve assembly 19, but because the system pressure is too low at this time, the safety valve assembly 19 does not open, and this path is blocked; the second path of oil... Figure 4 As shown in BB, one path passes through the right end of oil circuit I, through the variable throttle port 25, and enters the right end of the flow regulating valve body 2. Another path passes through the left side of oil circuit I, through the damping hole 26 on the flow regulating valve body 2 and the flow regulating valve core 4, and enters the left end of the flow regulating valve body 2.

[0019] Oil entering the flow regulating valve body 2 through the variable throttle orifice at the right end of oil circuit I enters oil circuit II, pushing open the one-way valve 15 and entering oil circuit IV. Since the first main valve stem 17 of the multi-way valve is not operated, the oil in oil circuit IV is sealed by the first main valve core 17. Thus, the oil pressure at both ends of the flow regulating valve body 2 is equal. Under the action of the flow regulating spring 5, the flow regulating valve body 2 moves to the leftmost end, the flow regulating valve closes, and the passage between oil circuit I and oil circuit V is sealed.

[0020] At the same time, in the first-connection neutral position, the first-connection main valve core 17 of the multi-way valve does not close the passage from oil circuit I to oil circuit III. The oil pump directly supplies oil to oil circuit III, and then to the next multi-way valve.

[0021] When the first link is in the lifting state, the tractor's first link has a hydraulic output requirement. The main valve stem 17 of the multi-way valve moves to the right position under external control. The system principle is as follows: Figure 7 As shown. At this time, after the oil from the oil pump enters the first housing 18, it splits into four paths: one path enters the oil inlet chamber of the safety valve 19; the second path enters the... Figure 4 As shown in BB, one path enters the right end of the flow regulating valve body 2 through the variable throttle port at the right end of oil circuit I, and the other path enters the left end of the flow regulating valve body 2 through the damping hole on the flow regulating valve core 4 at the left end of oil circuit I.

[0022] Oil from the right end of oil circuit I enters oil circuit II through the variable throttle orifice into the flow regulating valve body 2. Oil from the right end of the flow regulating valve 2 then enters oil circuit II, pushing open the check valve 15 to enter oil circuit IV. For example... Figure 5 As shown in CC, because the main valve stem 17 of the multi-way valve moves to the right position under external operation, the oil in oil circuit IV enters chamber A1 through the channel in the main valve stem 17 and the first-connection housing 18, and the oil in chamber B1 also flows back to the oil tank through the channel in the main valve stem 17 and the first-connection housing 18. At this time, Figure 2 As shown in Figure AA, oil from the oil pump enters the left side of the flow regulating valve body 2 through oil passage I, while pressurized oil in the working chamber A1 enters the right side of the flow regulating valve body 2 through oil passage II. Due to the oil flow, a pressure difference is generated between oil passage I and oil passage II. This pressure difference will inevitably balance the spring force of the flow regulating spring 5 inside the flow regulating valve body 2.

[0023] At this point, the flow regulating valve body 2 is in a new equilibrium position during operation. Since the gap between the flow regulating connector 7 and the first-connector housing 18 is constant, the pressure of the flow regulating spring 5 is constant, therefore the flow rate through oil circuit II is also constant. At this time, the valve port on the left side of the flow regulating valve body 2 is connected to oil circuit V through the flow regulating valve core 4. When the oil pump supply exceeds the required flow rate for oil circuit II, it enters oil circuit III through oil circuit V via the flow regulating valve core 4, and then enters the next multi-way valve. When the oil pressure in oil circuit I exceeds the set pressure of the safety valve 19, the safety valve 19 opens, and the oil pump supply leaks through the oil passage inside the first-connector housing 18 to the outlet T.

[0024] Adjustment of the variable throttle orifice: When the flow regulating rod 13 is rotated clockwise, the flow regulating connecting seat 7 moves to the left under the drive of the cylindrical pin 8, which reduces the gap between the regulating connecting seat 7 and the first housing 18, and at the same time increases the pre-compression force of the flow regulating spring 5, which changes the balance condition of the flow regulating valve body 2, and thus changes the stable flow through the throttle gap to the oil circuit II.

[0025] When the flow regulating rod 13 is rotated counterclockwise, the flow regulating connecting seat 7 moves to the right under the drive of the cylindrical pin 8, increasing the gap between the regulating connecting seat 7 and the first housing 18, while reducing the pre-tightening force of the flow regulating spring 5, changing the balance condition of the flow regulating valve body 2, and also changing the stable flow through the throttling gap to the oil circuit II.

[0026] When the flow regulating rod 13 is rotated clockwise, the flow regulating connecting seat 7 moves to the left under the action of the cylindrical pin 8 until the gap between the regulating connecting seat 7 and the first connecting housing 18 is completely overcome. At this point, the gap is zero, and the preload of the flow regulating spring 5 increases to its maximum. The variable throttling orifice also becomes a fixed throttling orifice on the flow regulating rod 13. At this time, the flow regulating valve body 2 reaches a new equilibrium condition, and the flow rate to oil circuit II through the throttling gap is fixed.

[0027] When the first link is in the lowered state, the tractor's first link has a hydraulic output demand. The main valve stem 17 of the multi-way valve moves to the left position under external control. The system principle is as follows: Figure 8 As shown. At this time, after the oil from the oil pump enters the first housing 18, it splits into four paths: one path enters the oil inlet chamber of the safety valve assembly 19; the second path enters the... Figure 4 As shown in Figure BB, one oil path enters the right end of the flow regulating valve body 2 through the variable throttle orifice at the right end of oil path I, while another path enters the left end of the flow regulating valve body 2 through the damping orifice on the flow regulating valve core 4 via the left side of oil path I. The oil entering the right end of the flow regulating valve body 2 through the variable throttle orifice at the right end of oil path I enters oil path III, pushing open the check valve 15 to enter oil path IV. (The text repeats itself here.) Figure 5 As shown in CC, because the main valve stem 17 of the multi-way valve moves to the right position under external operation, the oil in oil circuit IV enters chamber B1 through the channel in the main valve core 17 and the first-connection housing 18, and the oil in chamber A1 also flows back to the oil tank through the channel in the main valve core 17 and the first-connection housing 18. At this time, Figure 2 As shown in Figure AA, oil from the oil pump enters the right side of the flow regulating valve body 2 through oil passage I, and pressurized oil in the working chamber B1 enters the right side of the flow regulating valve body 2 through oil passage II. Due to the flow of oil, a pressure difference is generated between oil passage I and oil passage II. This pressure difference will inevitably balance the spring force of the flow regulating spring 5 inside the flow regulating valve body 2.

[0028] At this point, the flow regulating valve body 2 is in a new equilibrium position during operation. Since the gap between the flow regulating connector 7 and the first-connector housing 18 is constant, the pressure of the flow regulating spring 5 is constant, therefore the flow rate through oil circuit II is also constant. At this time, the valve port on the left side of the flow regulating valve body 2 is connected to oil circuit V through the flow regulating valve core 4. When the oil pump supply exceeds the required flow rate for oil circuit II, it enters oil circuit III through oil circuit V via the flow regulating valve core 4, and then enters the next multi-way valve. When the oil pressure in oil circuit I exceeds the set pressure of the safety valve 19, the safety valve 19 opens, and the oil pump supply leaks through the oil passage inside the first-connector housing 18 to the oil outlet T.

[0029] The main valve stem chamber can be matched with different configurations according to working needs, such as a four-position valve, and different functions can be added according to working needs, such as zero leakage, skip position, single or double action, etc.

[0030] The foregoing has shown and described the main features, basic principles, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention based on actual circumstances without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A multi-way valve assembly with adjustable flow rate in the first connection, characterized in that: The first joint includes a plug (1), a flow regulating valve body (2), a flow regulating spring (5), a flow regulating spring seat (6), a flow regulating connecting seat (7), a flow regulating valve seat (11), a check valve (15), a first joint main valve core (17), a first joint housing (18), and a safety valve assembly (19). The plug (1) is screwed into the leftmost end of the first oil passage. The flow regulating spring (5) is set on the right side of the flow regulating valve body (2). Under the action of the flow regulating spring (5), the flow regulating valve body (2) is pushed to the left end of the plug (1). The flow regulating valve body (2) is provided with a flow regulating valve core (4). The right side of the flow regulating spring (5) rests on the flow regulating spring seat (6), the right side of the flow regulating spring seat (6) abuts against the left end of the flow regulating connecting seat (7), the flow regulating connecting seat (7) is screwed into the flow regulating valve seat (11), and the flow regulating valve seat (11) is screwed into the right side of this oil passage. The flow regulating valve seat (11) is connected to a regulating mechanism for regulating flow. The regulating mechanism includes a flow regulating rod (13) positioned on the flow regulating valve seat (11). The flow regulating rod (13) is connected to the flow regulating connecting seat (7) via a cylindrical pin (8). By rotating the flow regulating rod (13), the distance between the flow regulating connecting seat (7) and the oil passage of the first connecting housing (18) is changed to achieve the regulation of the variable throttle orifice. The oil passage of the first connecting housing is divided into 5 oil passages, specifically including: Oil circuit I (20) is supplied by the oil pump; it enters the first connecting housing (18) through the oil inlet P, and enters the front end of the flow regulating connector (7) through the oil passage inside the first connecting housing (18); at the same time, it enters the valve port of the first connecting main valve core (17) through the oil passage inside the first connecting housing (18); at the same time, it enters the inlet of the safety valve assembly (19) through the oil passage inside the first connecting housing (18). Oil circuit II (21): After passing through the variable throttle port, oil circuit I enters the flow regulating spring (5) chamber on the right side of the flow regulating valve body (2) through the flow regulating connector (7). At the same time, oil circuit II can push open the check valve (15) through the oil passage inside the first connecting housing (18) and enter the left and right valve ports of the first connecting main valve core (17). Oil circuit Ⅲ (22): The first connection passes through the first connection main valve core (17) to the next connection multi-way valve oil circuit; Oil circuit Ⅳ (23): Oil circuit Ⅱ pushes open the check valve (15) and enters the oil circuit of the left and right valve ports of the first main valve core (17); Oil circuit V (24): After the flow regulating valve body (2) inside the first housing (18) moves to the right, it connects to oil circuit I and to the oil circuit of the next multi-way valve.

2. The multi-way valve assembly with flow rate regulation in the first connection according to claim 1, characterized in that: The flow regulating valve core (4) is connected to an elastic retaining ring (3) for limiting the displacement of the flow regulating valve core (4).

3. The multi-way valve assembly with flow rate regulation in the first connection according to claim 1, characterized in that: The flow regulating rod (13) is positioned on the flow regulating valve seat (11) by the flow regulating washer (10) and the retaining ring (12) to prevent the flow regulating rod (13) from moving left or right.

4. A multi-way valve assembly with flow rate regulation capability according to claim 1, characterized in that: The flow regulating valve seat (11) is sealed to the first housing (18) by an O-ring (9).

5. A multi-way valve assembly with flow rate regulation capability according to claim 1, characterized in that: The safety valve assembly (19) is screwed into the oil passage of the first housing (18) by threads and sealed to the first housing (18) by a seal.

6. A multi-way valve assembly with flow rate regulation capability according to claim 1, characterized in that: The first main valve core (17) is inserted into the oil passage of the first housing (18).

7. A multi-way valve assembly with flow rate regulation capability according to claim 1, characterized in that: The multi-way valve assembly includes chambers A1 and B1 in the valve body, and the one-way valve (15) is located between chambers A1 and B1. A one-way valve spring (14) is provided in the one-way valve (15).

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