Flush valve and flush valve device

Abstract

The utility model discloses a flush valve and a flush valve device. The flushing valve comprises a valve sleeve, a valve element and an adjusting assembly with an output end, the adjusting assembly is connected with the second end, opposite to the first end, of the valve sleeve, the output end is connected with the valve element, the adjusting assembly enables the valve element to be located at the first position or the second position or the third position, and the flushing valve can adjust the position of the valve element in the valve sleeve. The situation that the flushing valve cannot be opened or flow is small due to the fact that the pressure difference between the two sides of the valve element is too small is avoided, and stability of working performance of the flushing valve is guaranteed. The flushing valve device comprises the first pilot part, the second pilot part and the flushing valve, and the stability of the working performance of the flushing valve device is improved.

Description

Technical Field

[0001] This utility model relates to the field of flushing valve technology, specifically to a flushing valve and a flushing valve device. Background Technology

[0002] The flushing valve is a common component in closed-loop excavator systems. During use, a problem may arise where the pressure difference across the valve core is too small. This insufficient pressure difference can cause the flushing valve to fail to open or result in low flow, leading to poor stability during operation. Utility Model Content

[0003] The purpose of this invention is to at least solve some of the problems mentioned above.

[0004] To achieve this objective, the present invention proposes a flushing valve, which includes:

[0005] A valve sleeve, wherein the valve sleeve is provided with a first oil inlet, a second oil inlet, and an oil outlet;

[0006] A valve core, movably disposed within the valve sleeve, the valve core and the valve sleeve defining a first cavity near a first end of the valve sleeve, the valve core having a first oil passage communicating with the oil outlet; and

[0007] An adjusting assembly with an output end is connected to a second end of the valve sleeve opposite to the first end. The output end is connected to the valve core. The adjusting assembly causes the valve core to be in a first position, a second position, or a third position. When the valve core is in the first position, the first oil inlet and the second oil inlet are disconnected from the first oil passage. When the valve core is in the second position, the first oil inlet is connected to the first oil passage. When the valve core is in the third position, the second oil inlet is connected to the first oil passage.

[0008] The flushing valve can move the valve core through the adjustment component and adjust the position of the valve core in the valve sleeve. This ensures that the movement of the valve core is not affected by the small pressure difference on both sides of the valve core, thereby avoiding the situation where the flushing valve cannot be opened or the flow rate is small due to the excessively small pressure difference at both ends of the valve core. This helps to ensure the stability of the flushing valve's working performance.

[0009] As an optional embodiment, the adjustment component includes:

[0010] An end cap is connected to the valve sleeve, the end cap internally defines a piston chamber, and has a third oil inlet and a fourth oil inlet;

[0011] A piston, movably disposed in the piston chamber, dividing the piston chamber into a second chamber and a third chamber, a third oil inlet communicating with the second chamber, and a fourth oil inlet communicating with the third chamber. The third oil inlet is configured to connect with a first pilot member, such that the first pilot member supplies oil to the second chamber through the third oil inlet. The fourth oil inlet is configured to connect with a second pilot member, such that the second pilot member supplies oil to the third chamber through the fourth oil inlet.

[0012] A movable rod, one end of which is connected to the piston, and the other end of which is the output end of the adjustment assembly.

[0013] This regulating assembly introduces oil into the second or third chamber. The pressure difference between the oil in the second and third chambers drives the piston to reciprocate within the piston chamber, which in turn moves the movable rod, thereby causing the valve core to reciprocate between the first and second positions, or between the first and third positions. This regulating assembly ensures that the movement of the valve core is independent of the pressure difference between the first and second oil inlets, which helps to guarantee the stability of the flushing valve's operating performance.

[0014] As an alternative, the valve core is provided with a second oil passage, and when the valve core is in the first position, the second oil passage connects the first cavity and the second oil inlet.

[0015] This solution allows oil to enter through the second inlet when the first pilot component is not needed. The oil then enters the first chamber, and the oil pressure in the first chamber pushes the valve core from the first position to the third position, connecting the first inlet and outlet to enable the flushing valve to work normally. This helps to further improve the stability of the flushing valve's performance.

[0016] As an optional embodiment, the valve sleeve includes:

[0017] Valve core sleeve, the valve core sleeve having a first oil inlet, a second oil inlet, and an oil outlet, the first cavity being located within the valve core sleeve; and

[0018] A spring sleeve is connected to one end of the valve core sleeve that is away from the end closest to the first cavity;

[0019] The spring sleeve is provided with a reset component, which is located between the adjustment component and the valve core sleeve. The reset component is used to restore the valve core to the first position, thereby realizing the automatic reset of the valve core.

[0020] As an optional solution, the reset component includes:

[0021] A spring is disposed in the spring sleeve and sleeved on the movable rod, and the spring provides a force to the valve core to move towards the first position;

[0022] A first spring seat, sleeved on the movable rod, abutting at least one of the movable rod and the spring sleeve, the spring sleeved on the first spring seat with one end abutting against the first spring seat; and

[0023] The second spring seat is sleeved on the movable rod, and the second spring seat abuts against at least one of the valve core and the valve core sleeve. The spring is sleeved on the second spring seat and the other end of the spring abuts against the second spring seat.

[0024] The reset assembly, through the spring, the first spring seat, and the second spring seat, helps to ensure the stability of the valve core's automatic reset function and prevents the spring from twisting or deforming, which would affect the reset effect.

[0025] As an optional solution, the reset component further includes:

[0026] A limiting sleeve is fitted onto the movable rod, and a spring is fitted onto the limiting sleeve. When the valve core is in the first position, the limiting sleeve abuts against at most one of the first spring seat and the second spring seat.

[0027] The limiting sleeve can constrain the minimum distance between the first spring seat and the second spring seat when the spring is compressed.

[0028] This utility model also relates to a flushing valve device, comprising:

[0029] The flushing valve described above includes a third oil inlet and a fourth oil inlet;

[0030] A first pilot member, wherein the third oil inlet is connected to the first pilot member; and

[0031] The second pilot member, wherein the fourth oil inlet is connected to the second pilot member.

[0032] The flushing valve device can be started and stopped and the oil supply can be controlled through the first pilot and the second pilot, which helps to improve the stability of the working performance of the flushing valve device.

[0033] As an alternative, the first and second pilot elements are solenoid valves located outside the flushing valve. The first pilot element is connected to the third oil inlet via a pipeline, and the second pilot element is connected to the fourth oil inlet via a pipeline. Solenoid valves are commonly used pilot elements, offering high stability and ease of procurement. Furthermore, placing the first and second pilot elements of this flushing valve device externally within the flushing valve improves the flexibility of its structural placement.

[0034] As an optional solution, the flushing valve device further includes:

[0035] A shuttle valve is disposed between the first oil inlet and the third oil inlet, and the shuttle valve is used to connect one of the first oil inlet and the first pilot member to the third oil inlet.

[0036] This flushing valve device can ensure normal operation of the flushing valve whether the external first pilot is working or not, which helps to ensure the stability of the flushing valve device and avoid failure.

[0037] As an alternative, the oil inlet with the higher oil pressure of the first inlet and the first pilot can be connected to the third inlet to avoid oil mixing, which helps to improve the safety of the flushing valve device. Attached Figure Description

[0038] Figure 1 This is a three-dimensional schematic diagram of the flushing valve provided in an embodiment of the present utility model;

[0039] Figure 2 This is a schematic diagram of the flushing valve provided in an embodiment of the present invention;

[0040] Figure 3 yes Figure 2 Cross-sectional view of section AA;

[0041] Figure 4 This is a schematic diagram of the flushing valve device provided in this embodiment of the utility model.

[0042] Figure label:

[0043] 100-Flush valve;

[0044] 1-Valve sleeve; 11-Valve core sleeve; 111-First oil inlet; 112-Second oil inlet; 113-Oil outlet; 12-Spring sleeve; 13-First cavity;

[0045] 2-Valve core; 21-First oil passage; 22-Second oil passage; 221-First connecting hole; 222-Divider oil passage;

[0046] 3-Adjusting assembly; 31-End cap; 311-Piston chamber; 3111-Second chamber; 3112-Third chamber; 312-Third oil inlet; 313-Fourth oil inlet; 32-Piston; 33-Modible rod; 331-Rod body; 3311-Output end; 332-Fixing component; 333-Third oil passage; 34-First sealing ring; 35-Second sealing ring;

[0047] 4-Reset assembly; 41-Spring; 42-First spring seat; 421-Sleeve; 422-Boss; 43-Second spring seat; 44-Limiting sleeve;

[0048] 200 - First pilot element; 300 - Second pilot element; 400 - Shuttle valve. Detailed Implementation

[0049] The embodiments of the present invention are described in detail below, examples of which are shown 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.

[0050] This embodiment provides a flushing valve 100.

[0051] like Figures 1-3 As shown, the flushing valve 100 includes a valve sleeve 1, which has a first oil inlet 111, a second oil inlet 112, and an oil outlet 113. Specifically, the valve sleeve 1 has a tubular structure, with multiple first oil inlets 111, multiple second oil inlets 112, and multiple oil outlets 113. The multiple first oil inlets 111 and multiple second oil inlets 112 are spaced apart circumferentially along the valve sleeve 1. The multiple first oil inlets 111 and multiple second oil inlets 112 are parallel and spaced apart axially along the valve sleeve 1. The multiple oil outlets 113 are spaced apart circumferentially along the valve sleeve 1, and along the axial direction of the valve sleeve 1, the oil outlets 113 are located between the first oil inlets 111 and the second oil inlets 112. For example, in this embodiment, there are six first oil inlets 111 and six second oil inlets 112, and three oil outlets 113, so that when oil enters through the first oil inlet 111 or the second oil inlet 112, the oil flows out through the oil outlet 113, thereby ensuring that the flow rate of oil entering the valve sleeve 1 is greater than the flow rate exiting, which is beneficial to ensuring the working effect of the flushing valve 100. The first oil inlet 111 and the second oil inlet 112 are configured to be connected to the oil supply end so that oil can flow into the valve sleeve 1 from the first oil inlet 111 or the second oil inlet 112.

[0052] Furthermore, the flushing valve 100 also includes a valve core 2 movably inserted into the valve sleeve 1. Optionally, the valve core 2 has a rod-shaped structure, and the cross-sectional shape of the valve core 2 is the same as the cross-sectional shape of the inner wall of the valve sleeve 1, so as to facilitate the movement of the valve core 2 within the valve sleeve 1. Further, the valve core 2 and the valve sleeve 1 define a first cavity 13 near the first end of the valve sleeve, so as to facilitate the movement of the valve core 2 within the valve sleeve 1. The valve core 2 is provided with a first oil passage 21, which communicates with an oil outlet 113. In the axial direction of the valve core 2, a section of the valve core 2 at its middle position has a diameter smaller than the diameters at both ends, so that the smaller diameter section at the middle position of the valve core 2 maintains a predetermined distance from the valve sleeve 1, thereby forming the first oil passage 21 between the smaller diameter section of the valve core 2 and the valve sleeve 1. The position of the oil outlet 113 on the valve sleeve 1 corresponds to the first oil passage 21.

[0053] During use, the valve core 2 has a first position, a second position, or a third position within the valve sleeve 1. When the valve core 2 is in the first position, the first oil inlet 111 and the second oil inlet 112 are disconnected from the first oil passage 21. This first position is the initial position of the valve core 2 within the valve sleeve 1. When the valve core 2 is in the second position, the first oil inlet 111 is connected to the first oil passage 21. When the valve core 2 is in the third position, the second oil inlet 112 is connected to the first oil passage 21. When the flushing valve 100 operates, the valve core 2 moves from the first position to the second position, or the flushing valve 100 moves from the first position to the third position. For ease of explanation, the extension direction of the valve core 2 is defined as left-right. In this embodiment, the movement direction of the valve core 2 from the first position to the second position is defined as leftward movement, and the movement direction of the valve core 2 from the first position to the third position is defined as rightward movement.

[0054] Specifically, when valve core 2 is in the second position, the first oil inlet 111 and oil outlet 113 are connected through the first oil passage 21. When valve core 2 is in the third position, the second oil inlet 112 and oil outlet 113 are connected through the first oil passage 21. The connection between the first oil inlet 111 and oil outlet 113, and the connection between the second oil inlet 112 and oil outlet 113, respectively control the lifting and lowering of components of the enclosed excavator. The specific correspondence between the second or third position and the lifting and lowering actions can be changed according to the specific setting direction of the flushing valve 100; this embodiment does not limit this.

[0055] See Figure 3 and Figure 4In this embodiment, the flushing valve 100 further includes an adjusting component 3 with an output end 3311. The adjusting component 3 is connected to the second end of the valve sleeve 1 opposite to the first end, and the output end 3311 is connected to the valve core 2. The adjusting component 3 allows the valve core 2 to be located in a first position, a second position, or a third position. The flushing valve 100 can move the valve core 2 and adjust its position in the valve sleeve 1 through the adjusting component 3, so that the movement of the valve core 2 is not affected by the pressure difference between the first oil inlet 111 and the second oil inlet 112. This avoids the situation where the flushing valve cannot be opened or the flow rate is small due to the pressure difference between the two ends of the valve core 2 being too small, which is beneficial to ensuring the stability of the working performance of the flushing valve 100.

[0056] Now combined Figure 3 and Figure 4 The detailed structure of adjustment component 3 will be explained.

[0057] like Figure 3 As shown, the regulating assembly 3 includes an end cap 31 connected to the valve sleeve 1. The end cap 31 internally defines a piston chamber 311 and has a third oil inlet 312 and a fourth oil inlet 313. The end cap 31 has a cap-shaped structure and is located at the second end of the valve sleeve 1, i.e., the end cap 31 is connected to the left end of the valve sleeve 1. Optionally, the end cap 31 and the valve sleeve 1 are threaded together to facilitate assembly and disassembly.

[0058] The adjusting assembly 3 also includes a piston 32. The piston 32 is movably disposed in the piston chamber 311, dividing the piston chamber 311 into a second chamber 3111 and a third chamber 3112. A third oil inlet 312 communicates with the second chamber 3111 and is configured to connect with a first pilot member 200, allowing the first pilot member 200 to supply oil to the second chamber 3111 through the third oil inlet 312. The third oil inlet 312 can be disposed on the end face of the end cap 31 or on the side wall corresponding to the second chamber 3111. In this embodiment, the third oil inlet 312 is located on the end face of the end cap 31, allowing the entire space of the second chamber 3111 to be used for piston 32 movement. A fourth oil inlet 313 communicates with the third chamber 3112 and is configured to connect with a second pilot member 300, allowing the second pilot member 300 to supply oil to the third chamber 3112 through the fourth oil inlet 313.

[0059] It is understandable that, since the second cavity 3111 and the third cavity 3112 in the end cap 31 are used to contain oil, the adjusting assembly 3 also includes a first sealing ring 34 for sealing the end cap 31 and the valve sleeve 1. The first sealing ring 34 is disposed at the connection between the end cap 31 and the valve sleeve 1.

[0060] Furthermore, the adjusting assembly 3 also includes a movable rod 33, one end of which is connected to the piston 32, and the other end is the output end 3311 of the adjusting assembly 3. This allows the movable rod 33 to convert the movement of the piston 32 within the piston chamber 311 into the movement of the valve core 2 within the valve sleeve 1, facilitating the driving of the valve core 2 through the movable rod 33. Optionally, the movable rod 33 and the valve core 2 can be threaded together for easy assembly and disassembly. For example, the movable rod 33 can be a bolt.

[0061] See also Figure 3 The regulating component 3 introduces oil into either the second chamber 3111 or the third chamber 3112. The pressure difference between the oil in the second and third chambers 3111 and 3112 drives the piston 32 to reciprocate within the piston chamber 311, thereby moving the movable rod 33. This, in turn, causes the valve core 2 to reciprocate between the first and second positions, or between the first and third positions. This regulating component 3 ensures that the movement of the valve core 2 is independent of the pressure difference across the valve core, which helps maintain the stability of the flushing valve 100's operating performance.

[0062] Since piston 32 acts as a separator within piston chamber 311 to ensure the independence of the second chamber 3111 and the third chamber 3112, preventing oil mixing between them, and utilizing the pressure difference between the second chamber 3111 and the third chamber 3112 to drive piston 32 in reciprocating motion, the adjusting assembly 3 also includes a second sealing ring 35, disposed between the inner wall of end cap 31 and piston 32, ensuring a sealed connection.

[0063] As an alternative, the movable rod 33 and the piston 32 can be connected by threads, welding, or riveting. This application does not limit this.

[0064] In this embodiment, the movable rod 33 includes a rod body 331 and a fixing member 332. One end of the rod body 331 is connected to the valve core 2, and the other end passes through the piston 32. The rod body 331 abuts against the side of the piston 32 facing the third chamber 3112. The fixing member 332 is connected to the rod body 331 and abuts against the side of the piston 32 facing the second chamber 3111. The movable rod 33 abuts against both sides of the piston 32 through the fixing member 332 and the movable rod 33 itself, thereby improving the stability of the connection between the movable rod 33 and the piston 32.

[0065] Optionally, the valve core 2 is provided with a second oil passage 22. When the valve core 2 is in the first position, the second oil passage 22 connects the first chamber 13 and the second oil inlet 112. At this time, oil enters through the second oil inlet 112, and the oil can flow into the first chamber 13 through the second oil passage 22. This allows oil to enter the first chamber 13 through the second oil inlet 112 when the first pilot member 200 does not need to work, and then the oil pressure in the first chamber 13 pushes the valve core 2 from the first position to the third position, so that the first oil inlet 111 and the oil outlet 113 are connected.

[0066] Specifically, the second oil passage 22 includes a first connecting hole 221 and a branch oil passage 222. The branch oil passage 222 is a hole on the end face of the valve core 2 facing the first cavity 13, and its extension direction is the same as the axial direction of the valve core 2. The first connecting hole 221 connects the second oil inlet 112 and the branch oil passage 222, allowing oil to flow from the second oil inlet 112 to the first connecting hole 221, and then to the branch passage, before entering the first cavity 13.

[0067] Optionally, the first connecting hole 221 can be a throttling hole, which is beneficial for controlling the oil flow rate.

[0068] Optionally, the valve core 2 is also provided with an unloading hole, which is located between the oil distribution channel 222 and the first oil channel 21, so as to reduce the oil pressure when the oil pressure in the first chamber 13 is too high.

[0069] Optionally, the valve sleeve 1 includes a valve core sleeve 11 and a spring sleeve 12. The valve core sleeve 11 has a first oil inlet 111, a second oil inlet 112, and an oil outlet 113, with a first cavity 13 located inside the valve core sleeve 11. Meanwhile, the valve core 2 passes through the valve core sleeve 11. The spring sleeve 12 is connected to one end of the valve core sleeve 11 that is away from the end closest to the first cavity 13.

[0070] A reset component 4 is provided in the spring sleeve 12. The reset component 4 is located between the adjusting component 3 and the valve core sleeve 11. The reset component 4 is used to restore the valve core 2 to the first position so as to realize the automatic reset of the valve core 2.

[0071] The reset assembly 4 includes a spring 41, which is disposed in a spring sleeve 12. The spring sleeve 12 is disposed on the movable rod 33 of the adjusting assembly 3. The spring 41 provides a force to the valve core 2 to move to the first position, so as to realize the automatic reset of the valve core 2.

[0072] The reset assembly 4 also includes a first spring seat 42 and a second spring seat 43. The first spring seat 42 is sleeved on the movable rod 33, and at least one of the movable rod 33 and the spring sleeve 12 abuts against it. A spring 41 is sleeved on the first spring seat 42, with one end of the spring 41 abutting against the first spring seat 42. The second spring seat 43 is sleeved on the movable rod 33, and at least one of the valve core 2 and the valve core sleeve 11 abuts against it. The other end of the spring 41 is sleeved on the second spring seat 43. Specifically, when the piston 32 drives the movable rod 33 to move to the right, the valve core 2 can move from the first position to the right to the third position. During this process, the movable rod 33 pushes the first spring seat 42 to the right, and the second spring seat 43 abuts against the end face of the valve core sleeve 11, so that the first spring seat 42 and the second spring seat 43 together compress the spring 41. After the flushing valve 100 completes the flushing operation, the spring 41 drives the first spring seat 42 to reset, which in turn drives the movable rod 33 to reset. When the piston 32 drives the movable rod 33 to move to the left, the valve core 2 moves from the first position to the left to the second position. The valve core 2 pushes the second spring seat 43 to move to the left. At this time, the first spring seat 42 abuts against the spring sleeve 12, so that the first spring seat 42 and the second spring seat 43 can jointly compress the spring 41. After the flushing valve 100 completes the flushing operation, the spring 41 drives the second spring seat 43 to reset, which in turn drives the movable rod 33 to reset.

[0073] The reset assembly 4, through spring 41, first spring seat 42 and second spring seat 43, helps to ensure the stability of the automatic reset function of valve core 2 and avoids the spring 41 from being twisted or deformed, which would affect the reset effect.

[0074] Specifically, the first spring seat 42 includes a bushing 421 and a boss 422. The boss 422 is sleeved on the bushing 421, and the spring 41 is sleeved on the bushing 421. One side of the boss 422 abuts against the spring 41, and the other side abuts against at least one of the movable rod 33 and the spring sleeve 12. The second spring seat 43 has the same structure as the first spring seat 42, and the second spring seat 43 is arranged opposite to the first spring seat 42. The spring 41 is sleeved on the bushing 421 of the second spring seat 43. One side of the boss 422 of the second spring seat 43 abuts against the spring 41, and the other side abuts against at least one of the valve core 2 and the valve core sleeve 11.

[0075] In addition, as an optional solution, the reset assembly 4 also includes a limiting sleeve 44, which is fitted onto the movable rod 33. A spring 41 is fitted onto the limiting sleeve 44. The limiting sleeve 44 can constrain the minimum distance between the first spring seat 42 and the second spring seat 43 when the spring 41 is compressed. When the valve core 2 is in the first position, the limiting sleeve 44 abuts against at most one of the first spring seat 42 and the second spring seat 43, so that when the spring 41 is in the free state, the distance between the first spring seat 42 and the second spring seat 43 is greater than the limiting sleeve 44, so that the spring 41 can have compression space between the first spring seat 42 and the second spring seat 43.

[0076] Optionally, the movable rod 33 is provided with a third oil passage 333, which extends along the axial direction of the movable rod 33 so that the third cavity 3112 and the spring sleeve 12 are connected to the chamber where the spring 41 is located, so that the oil in the third cavity 3112 can flow into the spring sleeve 12 to lubricate the spring 41.

[0077] like Figure 4 As shown, this embodiment also provides a flushing valve device. The flushing valve device includes a first pilot 200, a second pilot 300, and the aforementioned flushing valve 100. A third oil inlet 312 is connected to the first pilot 200, and a fourth oil inlet 313 can be connected to the second pilot 300. This flushing valve device can achieve start / stop and control of oil supply through the first pilot 200 and the second pilot 300, which is beneficial to improving the stability of the working performance of the flushing valve device. Optionally, the first pilot 200 and the second pilot 300 are solenoid valves and are located outside the flushing valve 100. The first pilot 200 is connected to the third oil inlet 312 through a pipeline, and the second pilot 300 is connected to the fourth oil inlet 313 through a pipeline. Solenoid valves are commonly used pilot structures, have high stability, and are easy to procure. The first pilot 200 and the second pilot 300 of this flushing valve device are externally located within the flushing valve 100, which is beneficial to improving the flexibility of the structural installation position.

[0078] Optionally, the first pilot 200 and the second pilot 300 can be electrically controlled or hydraulically controlled, which helps to expand the applicability of the flushing valve device.

[0079] Furthermore, the flushing valve device also includes a shuttle valve 400, which is disposed between the first oil inlet 111 and the third oil inlet 312. The shuttle valve 400 is used to connect one of the first oil inlet 111 and the first pilot member 200 to the third oil inlet 312. Specifically, when the first pilot member 200 is working, it is directly connected to the third oil inlet 312. When the first pilot member 200 is not working, the first oil inlet 111 is connected to the third oil inlet 312. This flushing valve device can fulfill its function whether the external first pilot member 200 is working or not, which helps to ensure the stability of the flushing valve device's operation.

[0080] Optionally, the one with the higher pressure of the first oil inlet 111 and the first pilot member 200 is connected to the third oil inlet 312 to avoid oil mixing and improve the safety of the flushing valve device.

[0081] Now combined Figures 1-4 The working process of the flushing valve device is explained.

[0082] like Figures 1-4 As shown, when the first pilot component 200 is working normally:

[0083] If it is necessary for the first oil inlet 111 to connect with the oil outlet 113, the second pilot 300 is activated by electronic control, and the oil enters the third chamber 3112 through the fourth oil inlet 313. When the pressure in the third chamber 3112 is higher than that in the second chamber 3111, the pressure difference can push the piston 32 to move to the left, thereby driving the movable rod 33 to move to the left, which in turn drives the valve core 2 to move to the left, so that the first oil inlet 111 connects with the first oil passage 21, thus realizing the connection between the first oil inlet 111 and the oil outlet 113.

[0084] If it is necessary for the second oil inlet 112 to connect with the oil outlet 113, the first pilot element 200 is activated by electronic control, allowing oil to enter the second chamber 3111 through the third oil inlet 312. When the pressure in the second chamber 3111 is higher than that in the third chamber 3112, the pressure difference can push the piston 32 to move to the right, thereby driving the movable rod 33 to move to the right, which in turn drives the valve core 2 to move to the right, so that the second oil inlet 112 connects with the first oil passage 21, thus realizing the connection between the second oil inlet 112 and the oil outlet 113.

[0085] When the first pilot component 200 is not required to operate:

[0086] The oil in the first inlet 111 is connected to the third inlet 312 via the shuttle valve 400, allowing the oil to enter the second chamber 3111 through the third inlet 312. This oil acts on the left side of the piston 32. Simultaneously, the oil in the second inlet 112 enters the diversion channel through the first connecting hole 221, and then enters the first chamber 13, acting on the right side of the valve core 2. At this time, the pressure difference between the first chamber 13 and the second chamber 3111 pushes the valve core 2 to move, thereby controlling the reversing of the flushing valve 100. Specifically, when the pressure in the first chamber 13 is greater than that in the second chamber 3111, the pressure difference can push the valve core 2 to the left, connecting the first inlet 111 with the first oil passage 21, thus connecting the first inlet 111 and the outlet 113. When the pressure in the first chamber 13 is less than that in the second chamber 3111, the pressure difference can push the valve core 2 to move to the right, so that the second oil inlet 112 is connected to the first oil passage 21, thereby realizing the connection between the second oil inlet 112 and the oil outlet 113.

[0087] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "longitudinal", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0089] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0090] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0091] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0092] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A flushing valve, characterized in that, include: Valve sleeve (1), the valve sleeve (1) is provided with a first oil inlet (111), a second oil inlet (112) and an oil outlet (113); A valve core (2) movably inserted into the valve sleeve (1), the valve core (2) and the valve sleeve (1) defining a first cavity (13) near a first end of the valve sleeve (1), the valve core (2) having a first oil passage (21) communicating with the oil outlet (113); and An adjusting assembly (3) having an output end (3311) is connected to the second end of the valve sleeve (1) opposite to the first end. The output end (3311) is connected to the valve core (2). The adjusting assembly (3) causes the valve core (2) to be in a first position, a second position, or a third position. When the valve core (2) is in the first position, the first oil inlet (111) and the second oil inlet (112) are disconnected from the first oil passage (21). When the valve core (2) is in the second position, the first oil inlet (111) is connected to the first oil passage (21). When the valve core (2) is in the third position, the second oil inlet (112) is connected to the first oil passage (21).

2. The flushing valve according to claim 1, characterized in that, The adjustment component (3) includes: End cap (31), the end cap (31) is connected to the valve sleeve (1), the end cap (31) internally defines a piston chamber (311), and has a third oil inlet (312) and a fourth oil inlet (313); A piston (32) movably disposed in a piston chamber (311), the piston (32) dividing the piston chamber (311) into a second chamber (3111) and a third chamber (3112), the third oil inlet (312) communicating with the second chamber (3111), and the fourth oil inlet (313) communicating with the third chamber (3112), the third oil inlet (312) being configured to connect with a first pilot (200) such that the first pilot (200) supplies oil to the second chamber (3111) through the third oil inlet (312), and the fourth oil inlet (313) being configured to connect with a second pilot (300) such that the second pilot (300) supplies oil to the third chamber (3112) through the fourth oil inlet (313); and A movable rod (33) is provided, one end of which is connected to the piston (32), and the other end is the output end (3311) of the adjustment assembly (3).

3. The flushing valve according to claim 2, characterized in that, The valve core (2) is provided with a second oil passage (22). When the valve core (2) is in the first position, the second oil passage (22) connects the first cavity (13) and the second oil inlet (112).

4. The flushing valve according to claim 2 or 3, characterized in that, The valve sleeve (1) includes: A valve core sleeve (11) is provided with a first oil inlet (111), a second oil inlet (112), and an oil outlet (113), wherein the first cavity (13) is located inside the valve core sleeve (11); and A spring sleeve (12) is connected to one end of the valve core sleeve (11) that is away from the end of the first cavity (13); The spring sleeve (12) is provided with a reset component (4), which is located between the adjustment component (3) and the valve core sleeve (11) and is used to restore the valve core (2) to the first position.

5. The flushing valve according to claim 4, characterized in that, The reset component (4) includes: A spring (41) is disposed in the spring sleeve (12) and sleeved on the movable rod (33). The spring (41) provides a force to the valve core (2) to move toward the first position. A first spring seat (42) is sleeved on the movable rod (33), and the first spring seat (42) abuts against at least one of the movable rod (33) and the spring sleeve (12). A spring (41) is sleeved on the first spring seat (42), and one end of the spring (41) abuts against the first spring seat (42). The second spring seat (43) is sleeved on the movable rod (33). The second spring seat (43) abuts against at least one of the valve core (2) and the valve core sleeve (11). The spring (41) is sleeved on the second spring seat (43) and the other end of the spring (41) abuts against the second spring seat (43).

6. The flushing valve according to claim 5, characterized in that, The reset component (4) further includes: A limiting sleeve (44) is fitted on the movable rod (33), and a spring (41) is fitted on the limiting sleeve (44). When the valve core (2) is in the first position, the limiting sleeve (44) abuts against at most one of the first spring seat (42) and the second spring seat (43).

7. A flushing valve device, characterized in that, include: The flushing valve as described in any one of claims 2-6; The first pilot member (200) is connected to the third oil inlet (312); as well as The second pilot member (300) is connected to the fourth oil inlet (313).

8. The flushing valve device according to claim 7, characterized in that, The first pilot (200) and the second pilot (300) are solenoid valves and are located outside the flushing valve. The first pilot (200) is connected to the third oil inlet (312) through a pipeline, and the second pilot (300) is connected to the fourth oil inlet (313) through a pipeline.

9. The flushing valve device according to claim 8, characterized in that, The flushing valve device also includes: A shuttle valve (400) is disposed between the first oil inlet (111) and the third oil inlet (312), and the shuttle valve (400) is used to connect one of the first oil inlet (111) and the first pilot (200) to the third oil inlet (312).

10. The flushing valve device according to claim 9, characterized in that, The oil pressure of the first oil inlet (111) and the first pilot (200) is greater and is connected to the third oil inlet (312).

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