Multi-way hydraulic valve for engineering machinery

Abstract

The utility model discloses an engineering machinery multi-way hydraulic valve which comprises a base and a filter screen, the top of the base is connected with a plurality of valve bodies, one end of each valve body is connected with a liquid outlet connector, the other end of each valve body is provided with a liquid inlet, a filter basket is arranged in each valve body, a back washing assembly used for washing the filter basket is arranged in the base, and the filter screen is arranged in one end of a U-shaped pipe. The backwashing assembly comprises a first motor and a first valve element, the first motor is arranged in the base, an output shaft of the first motor is connected with a valve rod, one end of the valve rod is connected with a clamping block, and the washing water is conveyed to the rear end of the filtering basket through a U-shaped pipe of the backwashing assembly; impurities adsorbed on the surfaces of the meshes are washed away by utilizing impact force of water flow and are discharged from the blow-off pipe, so that the problem that the meshes are blocked due to accumulation of the impurities is effectively avoided, smooth circulation of hydraulic oil is ensured, and the problem that the filter basket needs to be frequently disassembled for cleaning during cleaning is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of multi-way hydraulic valve technology, specifically relating to a multi-way hydraulic valve for engineering machinery. Background Technology

[0002] In the field of construction machinery, hydraulic systems, as the core power transmission method, are widely used in various equipment such as excavators, loaders, and cranes. Multi-way hydraulic valves, as key control components of hydraulic systems, can independently and precisely control multiple actuators, thereby accurately regulating the flow direction, pressure, and flow rate of hydraulic oil to achieve precise control of various complex actions of construction machinery. However, with the increasingly complex and harsh operating environment of construction machinery, the risk of hydraulic oil contamination is constantly increasing. Dust, sand, metal shavings, and other impurities at the construction site can easily enter the hydraulic system through various means. To prevent impurities from entering the hydraulic system when the multi-way hydraulic valve is delivering hydraulic oil, a filter basket is installed inside the multi-way hydraulic valve to filter the hydraulic oil.

[0003] Existing methods use a screen-type filter basket installed at the inlet of a multi-way hydraulic valve to intercept impurities in the hydraulic oil. However, during use, the intercepted impurities adhere to the surface of the filter basket's mesh. Over time, the mesh becomes clogged, leading to poor hydraulic oil flow, reduced system pressure, and impacting the overall performance of the hydraulic system. This necessitates periodic shutdowns to open the multi-way hydraulic valve and disassemble the filter basket for cleaning, increasing maintenance workload. Utility Model Content

[0004] The purpose of this utility model is to provide a multi-way hydraulic valve for engineering machinery to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-way hydraulic valve for engineering machinery, comprising:

[0006] The base has several valve bodies connected to its top. One end of each valve body is connected to an outlet connector, and the other end is provided with an inlet. The valve body contains a filter basket for filtering out minute impurities in the hydraulic oil. The base contains a backwashing assembly for rinsing the filter basket. The backwashing assembly delivers flushing water to the rear end of the filter basket through a U-shaped tube, so that the flushing water in the U-shaped tube washes away the impurities in the filter basket and then discharges them from the drain pipe on the surface of the valve body.

[0007] A filter screen, located inside one end of a U-shaped tube, is used to filter the rinsing water.

[0008] Preferably, the backwashing assembly includes a first motor and a first valve core. The first motor is disposed in the base and the output shaft of the first motor is connected to a valve stem. One end of the valve stem is connected to a locking block.

[0009] Preferably, the first valve core is disposed inside the U-shaped tube, and one end of the valve stem rotates through the U-shaped tube and then engages with the slot at the top of the first valve core via a locking block.

[0010] Preferably, a second motor is provided at the top of the valve body, a second valve core is provided inside the valve body, and a valve stem is also attached to the top of the second valve core via a slot.

[0011] Preferably, the output shaft of the second motor rotates through the valve body and connects to the valve stem.

[0012] Preferably, both the first valve core and the second valve core have slots in their inner center.

[0013] Preferably, the valve body is connected to a switch seat, and the switch seat has an opening in the middle.

[0014] Preferably, the valve body is provided with an electric cylinder at the top, and the piston rod of the electric cylinder slides through the valve body and connects to the sealing block sealed inside the opening.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) The backwash water is delivered to the rear end of the filter basket through the U-shaped pipe of the backwash component. The water flow impact force washes away the impurities adsorbed on the mesh surface and discharges them from the drain pipe. This effectively avoids the problem of mesh blockage caused by impurity accumulation, thereby ensuring smooth hydraulic oil flow and avoiding the problem of frequently disassembling the filter basket for cleaning.

[0017] (2) By installing a filter screen inside one end of the U-shaped tube of the backwashing assembly, the flushing water can be filtered, thereby preventing impurities that may exist in the flushing water from re-entering the hydraulic system or causing secondary pollution to the filter basket, and ensuring that the hydraulic oil entering the hydraulic system always maintains a high level of cleanliness. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a side view of the present invention;

[0020] Figure 3 This is a schematic diagram of the valve stem and the first valve core of this utility model.

[0021] In the diagram: 1. Base; 2. Valve body; 3. Liquid outlet connector; 4. Liquid inlet; 5. Filter basket; 6. U-shaped tube; 7. Drain pipe; 8. Filter screen; 9. First motor; 10. First valve core; 11. Valve stem; 12. Locking block; 13. Second motor; 14. Second valve core; 15. Switch seat; 16. Opening; 17. Electric cylinder; 18. Sealing block; 19. Groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides, for example Figure 1-3 The multi-way hydraulic valve for engineering machinery shown includes:

[0024] A base 1 is provided, and a plurality of valve bodies 2 are connected to the top of the base 1. One end of each valve body 2 is connected to an outlet connector 3, and the other end is provided with an inlet port 4. A filter basket 5 is provided inside the valve body 2 for filtering out tiny impurities in the hydraulic oil. A backwashing assembly is provided inside the base 1 for rinsing the filter basket 5. The backwashing assembly delivers flushing water to the rear end of the filter basket 5 through a U-shaped pipe 6, so that the flushing water in the U-shaped pipe 6 washes away the impurities in the filter basket 5 and then discharges them from the drain pipe 7 on the surface of the valve body 2.

[0025] The filter screen 8 is located inside one end of the U-shaped tube 6 and is used to filter the rinsing water.

[0026] The backwashing assembly includes a first motor 9 and a first valve core 10. The first motor 9 is located inside the base 1 and the output shaft of the first motor 9 is connected to a valve stem 11. One end of the valve stem 11 is connected to a locking block 12.

[0027] The first valve core 10 is located inside the U-shaped tube 6. One end of the valve stem 11 rotates through the U-shaped tube 6 and then engages with the slot at the top of the first valve core 10 via the locking block 12.

[0028] The valve body 2 is provided with a second motor 13 at the top, and a second valve core 14 is provided inside the valve body 2. The valve stem 11 is also connected to the top of the second valve core 14 through a slot.

[0029] The output shaft of the second motor 13 rotates through the valve body 2 and connects to the valve stem 11.

[0030] Both the first valve core 10 and the second valve core 14 have a slot 19 in the middle, which allows the medium to flow.

[0031] The valve body 2 is connected to a switch seat 15, and the switch seat 15 has an opening 16 in the middle. The valve body 2 is equipped with an electric cylinder 17 at the top, and the piston rod of the electric cylinder 17 slides through the valve body 2 and is connected to a sealing block 18 sealed in the opening 16. The piston rod of the electric cylinder 17 can drive the sealing block 18 to move in the opening 16, thereby controlling the opening and closing of the opening 16.

[0032] The multi-way hydraulic valve of this engineering machinery allows hydraulic oil to enter through the inlet 4 of multiple valve bodies 2. The output shaft of the second motor 13 drives the second valve core 14 to rotate through the valve stem 11, aligning the slot 19 of the second valve core 14 with the inlet 4, allowing the hydraulic oil to flow to the filter basket 5. The hydraulic oil first passes through the filter basket 5, and through the mesh structure of the filter basket 5, it intercepts tiny impurities in the hydraulic oil. Meanwhile, the piston rod of the electric cylinder 17 retracts, causing the sealing block 18 to disengage from the seal on the opening 16. The clean hydraulic oil then flows through the opening 16 to the outlet connector 3, and is then delivered to the various actuators of the hydraulic system. At this time, the backflushing assembly is in the off state, and the first valve core 10 of the U-tube 6 is in the initial position, keeping the U-tube 6 closed and ensuring that the normal flow path of the hydraulic oil is not affected.

[0033] When backwashing of the filter basket 5 is required, the hydraulic oil supply is stopped, and the second valve core 14 is rotated by the second motor 13, so that the slot 19 of the second valve core 14 contacts the inner wall of the valve body 2, thereby closing the channel to the filter basket 5. At this time, flushing water can be supplied to the inlet 4, and the first motor 9 is started. The first motor 9 drives the valve stem 11 to rotate. The valve stem 11 is engaged with the slot on the top of the first valve core 10 through the locking block 12, so that the first valve core 10 rotates in the U-shaped tube 6, so that the slot 19 of the first valve core 10 is aligned with the water inlet channel of the U-shaped tube, so that the external flushing water can enter the rear end of the filter basket 5 in the valve body 2 through the U-shaped tube 6, thereby backwashing the rear end of the filter basket 5.

[0034] Since the pressure at the rear end of the filter basket 5 is higher than that at the front end, under the action of the pressure difference, the flushing water flows from the rear end to the front end of the filter basket 5, washing away the impurities adsorbed on the mesh of the filter basket 5. The flushing water carrying the impurities continues to flow forward and is discharged into the valve body 2 through the drain pipe 7 on the valve body 2. During the process of the flushing water flowing to the U-shaped pipe 6, the filter screen 8 in one end of the U-shaped pipe 6 can filter the flushing water to prevent the impurities in the flushing water from re-entering the hydraulic system or causing secondary pollution to the filter basket 5.

[0035] After backwashing is completed, the first motor 9 is started, the valve stem 11 drives the first valve core 10 to rotate and close the U-shaped pipe 6 again, stopping the supply of flushing water. At the same time, the second motor 13 is started, the second motor 13 drives the valve stem 11 to rotate, so that the second valve core 14 returns to the initial position, restoring the normal flow path of hydraulic oil in the valve body 2, and the multi-way hydraulic valve continues to work normally.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-way hydraulic valve for engineering machinery, characterized in that, include: A base (1) is provided with a number of valve bodies (2) connected to the top of the base (1). One end of the valve body (2) is connected to a liquid outlet connector (3) and the other end is provided with a liquid inlet (4). The valve body (2) is provided with a filter basket (5) for filtering out small impurities in the hydraulic oil. The base (1) is provided with a backwashing assembly for rinsing the filter basket (5). The backwashing assembly's U-shaped tube (6) delivers the rinsing water to the rear end of the filter basket (5) so that the rinsing water in the U-shaped tube (6) rinses the impurities in the filter basket (5) and then discharges them from the drain pipe (7) on the surface of the valve body (2). A filter screen (8) is located inside one end of a U-shaped tube (6) and is used to filter the rinsing water.

2. The multi-way hydraulic valve for engineering machinery according to claim 1, characterized in that: The backwashing assembly includes a first motor (9) and a first valve core (10). The first motor (9) is located inside the base (1) and the output shaft of the first motor (9) is connected to a valve stem (11). One end of the valve stem (11) is connected to a locking block (12).

3. A multi-way hydraulic valve for engineering machinery according to claim 2, characterized in that: The first valve core (10) is located inside the U-shaped tube (6). One end of the valve stem (11) rotates through the U-shaped tube (6) and then engages with the slot at the top of the first valve core (10) through the locking block (12).

4. A multi-way hydraulic valve for engineering machinery according to claim 2, characterized in that: The valve body (2) is provided with a second motor (13) at the top, and a second valve core (14) is provided inside the valve body (2). The valve stem (11) is also connected to the top of the second valve core (14) through a slot.

5. A multi-way hydraulic valve for engineering machinery according to claim 4, characterized in that: The output shaft of the second motor (13) rotates through the valve body (2) and connects to the valve stem (11).

6. A multi-way hydraulic valve for engineering machinery according to claim 4, characterized in that: The first valve core (10) and the second valve core (14) both have slots (19) in the middle.

7. A multi-way hydraulic valve for engineering machinery according to claim 1, characterized in that: The valve body (2) is connected to a switch seat (15), and the switch seat (15) has an opening (16) in the middle.

8. A multi-way hydraulic valve for engineering machinery according to claim 7, characterized in that: The valve body (2) is equipped with an electric cylinder (17) at the top, and the piston rod of the electric cylinder (17) slides through the valve body (2) and connects to the sealing block (18) sealed inside the opening (16).

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