Two-position three-way hydraulic control reversing valve

Abstract

The application discloses a two-position three-way hydraulic control reversing valve, which comprises a reversing valve body assembly, a filter cleaning assembly connected with the reversing valve body assembly and used for filtering impurities, and an auxiliary moving assembly used for adjusting the position of an oil port of the reversing valve body assembly. The reversing valve body assembly comprises a valve body shell, a first liquid conveying groove and a second liquid conveying groove are formed in the valve body shell, an oil inlet and an oil outlet are communicated through the valve body shell, an oil return port is communicated through the valve body shell, a first spring is arranged between spring seats arranged in the first liquid conveying groove and used for buffering and damping, the first spring is located on one side of a sealing plate, a valve core is penetrated through a second spring arranged in the second liquid conveying groove, and a sealing ring is inlaid on the valve core to avoid gas leakage. The two-position three-way hydraulic control reversing valve is manually used for adjusting the position of the valve core in the reversing valve body assembly and filtering and treating the hydraulic oil discharged from the oil return port, and the whole device has the advantages of being directly manually disassembled.

Description

Technical Field

[0001] This invention relates to the field of two-position three-way hydraulic control directional valve technology, specifically a two-position three-way hydraulic control directional valve. Background Technology

[0002] Hydraulic directional control valves are classified according to the number of passages they control: two-way, three-way, four-way, and five-way, etc. They utilize the absolute movement of the valve core relative to the valve body to open, close, or change the direction of oil flow, thereby enabling the hydraulic actuators and their drive mechanisms to start, stop, or change their direction of movement. Existing two-position three-way hydraulic directional control valves adjust the valve core position via a hydraulic device during operation. If the hydraulic device controlling the valve core malfunctions and cannot be repaired promptly, the entire device will stop working. Furthermore, since the two-position three-way hydraulic directional control valve is a single unit, a complete replacement is required if the entire valve malfunctions, increasing costs. Additionally, when hydraulic oil is discharged, the internal hydraulic oil remains untreated, allowing impurities to enter other locations and adhere to oil pipes or machinery, affecting the valve's service life. Summary of the Invention

[0003] The purpose of this invention is to provide a two-position three-way hydraulic control directional valve to solve the problems mentioned in the background art. These problems include: in existing two-position three-way hydraulic control directional valves, the valve core position is adjusted by a hydraulic device during operation; if the hydraulic device controlling the valve core malfunctions, it cannot be repaired in time, and the entire device will stop working; furthermore, the two-position three-way hydraulic control directional valve is a single unit, and if the entire valve malfunctions, it needs to be replaced, increasing costs; and when the hydraulic oil is discharged, the internal hydraulic oil is untreated, and impurities enter other locations and adhere to oil pipes or machinery, affecting the service life.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a two-position three-way hydraulic control directional valve, including a directional valve body assembly, the directional valve body assembly being connected to a filter and cleaning assembly and used for filtering impurities, and the directional valve body assembly adjusting the oil port position through an auxiliary moving assembly;

[0005] The reversing valve body assembly includes a valve body shell, with a first inlet groove and a second inlet groove inside the valve body shell. The first inlet groove is connected to an oil inlet and an oil outlet that pass through the valve body shell, and the second inlet groove is connected to a return oil outlet that passes through the valve body shell. A first spring is installed between spring seats placed in the first inlet groove for buffering and shock absorption. The first spring is located on one side of the sealing plate. A valve core passes through the second spring placed in the second inlet groove, and a sealing ring is embedded in the valve core to prevent air leakage.

[0006] Preferably, the filter cleaning assembly includes a second annular sealing plate, a third annular sealing plate is threadedly connected to the second annular sealing plate, a filter screen for impurity filtration is snapped onto the third annular sealing plate, and a dual-head motor body fixed on the filter screen drives a cleaning brush body to clean the filter screen.

[0007] By adopting the above technical solution, the hydraulic oil is filtered and treated using a filtration and cleaning component.

[0008] Preferably, the third annular sealing plate and the filter screen are provided in two sets, the two sets of filter screens have different mesh densities, and the two sets of third annular sealing plates are threadedly connected.

[0009] By adopting the above technical solution, the filtration quality is guaranteed by setting up two sets of filter screens.

[0010] Preferably, an arc-shaped groove is provided on the lower side of the third annular sealing plate to settle impurities.

[0011] By adopting the above technical solution, the setting of arc-shaped grooves helps to precipitate impurities.

[0012] Preferably, the auxiliary moving component includes a connecting plate, on which a hydraulic cylinder storage box is fixed. A telescopic structure inside the hydraulic cylinder storage box extends and retracts to adjust the position of the valve core. A storage slot is opened inside the hydraulic cylinder storage box and sealed by a sealing cover. A rotating screw on one side of the storage slot is threadedly connected to a threaded limiting groove through a threaded connecting block and is used to manually adjust the position of the valve core.

[0013] By adopting the above technical solution, the valve core position can be adjusted by setting an auxiliary moving component.

[0014] Preferably, the threaded limiting groove is provided in two sets, and the two sets of threaded limiting grooves are provided on the valve core, and the two sets of threaded limiting grooves are symmetrically arranged about the central axis of the valve core.

[0015] Preferably, the rotating screw has two sections, which are threadedly connected.

[0016] By adopting the above technical solution, the position of the valve core can be manually adjusted by rotating screws in two sets of threaded limiting grooves.

[0017] Preferably, the entire device is electrically connected to a PLC.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the two-position three-way hydraulic control directional valve,

[0019] (1) The present invention has the advantages of manually adjusting the position of the valve core in the reversing valve body assembly, filtering the hydraulic oil discharged from the return port, and manually disassembling the entire device. The first annular sealing plate is threadedly connected to the connecting plate, and the first annular sealing plate and the connecting plate are directly set with a sealing ring to ensure the sealing effect. When the hydraulic cylinder in the hydraulic cylinder storage box fails, the connecting part between the hydraulic rod and the connecting rod is disassembled. The threaded connecting block on the rotating screw is threadedly connected in the threaded limit groove. The rotating screw is manually pushed, and the position of the valve core is manually moved by rotating the screw, thereby ensuring that the whole operation is normal and avoiding the hydraulic oil in the first and second infusion tanks from flowing out during maintenance, causing unnecessary waste.

[0020] (2) In this invention, the reversing valve body assembly, the filter cleaning assembly, and the auxiliary moving assembly are disassembled and installed. After the reversing valve body assembly, the filter cleaning assembly, and the auxiliary moving assembly are disassembled, the internal parts of the reversing valve body assembly can be directly repaired, cleaned, or replaced without the need for overall replacement, thus saving costs.

[0021] (3) With the assistance of two sets of filter screens, the present invention filters the hydraulic oil, ensuring the quality of the hydraulic oil entering other positions and extending the service life of the entire device. The double-headed motor body fixed on the filter screen drives the cleaning brush body to rotate, and the cleaning brush body automatically cleans the filter screen to avoid clogging of the filter screen and affecting the oil output effect. The two sets of third annular sealing plates are sealed by a sealing ring to ensure the sealing effect. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the present invention;

[0023] Figure 2 This is a top view of the structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the right-side structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the left-side structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the reversing valve body assembly and the filter cleaning assembly of the present invention;

[0027] Figure 6 This is a schematic diagram of the distribution structure of the spring seat within the valve body housing of the present invention;

[0028] Figure 7 This is a schematic diagram of the distribution structure of the cleaning brush body on the filter screen according to the present invention;

[0029] Figure 8 This is a three-dimensional structural diagram of the two-position three-way hydraulic control directional valve of the present invention.

[0030] In the diagram: 1. Reversing valve body assembly; 101. Valve body shell; 102. First infusion tank; 103. Second infusion tank; 104. Oil inlet; 105. Oil outlet; 106. Spring seat; 107. First spring; 108. Sealing plate; 109. Valve core; 1010. Second spring; 1011. Oil return port; 1012. Sealing ring; 1013. First annular sealing plate; 2. Filter cleaning assembly; 201. Second annular sealing plate; 202. Third annular sealing plate; 203. Dual-head motor body; 204. Cleaning brush body; 205. Filter screen; 206. Arc-shaped groove; 3. Auxiliary moving assembly; 301. Connecting plate; 302. Hydraulic cylinder storage box; 303. Storage tank; 304. Sealing cover; 305. Rotating screw; 306. Threaded connecting block; 307. Threaded limiting groove. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-8 This invention provides a technical solution: a two-position three-way hydraulically controlled directional valve, such as... Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, the device includes a reversing valve body assembly 1, which includes a valve body housing 101. A first infusion groove 102 and a second infusion groove 103 are provided inside the valve body housing 101. The first infusion groove 102 is connected to an oil inlet 104 and an oil outlet 105 that pass through the valve body housing 101. The second infusion groove 103 is connected to a return oil outlet 1011 that passes through the valve body housing 101. A first spring 107 is provided between the spring seats 106 placed in the first infusion groove 102 for buffering and shock absorption. The first spring 107 is located on one side of the sealing plate 108. A valve core 109 passes through the second spring 1010 placed in the second infusion groove 103. A sealing ring 1012 is embedded on the valve core 109 to prevent air leakage.

[0033] Preferably, four sets of oil outlet 105 and oil return 1011 are provided. The four sets of oil outlet 105 and oil return 1011 pass through the valve body shell 101 to ensure uniform oil output and return processing. A sealing ring 1012 is arranged around the sealing plate 108 to ensure sealing quality.

[0034] In a further preferred embodiment, the valve body housing 101 is threadedly disassembled and installed with the first annular sealing plate 1013 and the second annular sealing plate 201, and a sealing gasket is embedded between the valve body housing 101 and the first annular sealing plate 1013 and the second annular sealing plate 201 to prevent air leakage. Similarly, after disassembly, the inside of the valve body housing 101 can be cleaned directly, or internal parts can be replaced. The operation is simple and convenient. The valve body housing 101 is made of high-carbon alloy steel, which has the characteristics of high hardness, good wear resistance, and stable heat treatment performance. The mechanical directional valve has a high-pressure control port X (AT) in the normal position and a low-pressure control port X (PA) in the working position. The two-position three-way hydraulic directional valve has a small size and a larger flow rate than conventional slide valves. It has no built-in control oil passage or oil hole and adopts a low-pressure external control and external leakage method, which reduces pressure loss, greatly reduces noise, and improves overall working efficiency.

[0035] In the above scheme, the hydraulic cylinder enters the first fluid delivery tank 102 through four sets of oil inlets 104 and exits through the oil outlet 105. If oil return processing is required, the hydraulic cylinder in the hydraulic cylinder storage box 302 drives the hydraulic rod to drive the connecting rod to drive the valve core 109 to move to the right and squeeze the second spring 1010. The sealing ring 1012 on the valve core 109 has a sealing effect. The movement of the valve core 109 squeezes the first spring 107 between the spring seats 106 through the sealing plate 108 in the first fluid delivery tank 102. Finally, the sealing plate 108 seals the oil outlet 105. The oil inlet 104 is connected to the oil return port 1011 on the second fluid delivery tank 103. The hydraulic oil is returned through the oil return port 1011.

[0036] like Figure 1 , Figure 4 , Figure 5 and Figure 7 As shown, the reversing valve body assembly 1 is connected to the filter cleaning assembly 2 and is used to filter impurities. The filter cleaning assembly 2 includes a second annular sealing plate 201, a third annular sealing plate 202 is threadedly connected to the second annular sealing plate 201, a filter screen 205 for filtering impurities is snapped onto the third annular sealing plate 202, and a double-headed motor body 203 fixed on the filter screen 205 drives the cleaning brush body 204 to clean the filter screen 205.

[0037] Preferably, in this application, the cleaning brush body 204 includes a fixing plate and a cleaning brush, and the dual-head motor body 203 is connected to the PLC via Bluetooth, and the dual-head motor body 203 is controlled by the PLC.

[0038] Furthermore, the third annular sealing plate 202 and the filter screen 205 are both provided in two sets, with different mesh densities for the two sets of filter screens 205. The two sets of third annular sealing plates 202 are connected by threads. The filter screen 205 on the right side pre-treats the impurities in the hydraulic oil. The pre-treated hydraulic cylinder is filtered again by the filter screen 205 on the left side to ensure the filtration quality.

[0039] In a further preferred embodiment, an arc-shaped groove 206 is provided on the lower side of the third annular sealing plate 202 for settling impurities. The arc-shaped groove 206 is provided on both sides of the filter screen 205 to facilitate the settling of impurities that fall off during filtration.

[0040] In the above-mentioned further solution, the second annular sealing plate 201 and the third annular sealing plate 202 are rotated, the second annular sealing plate 201 and the third annular sealing plate 202 are disassembled, the filter screen 205 is rotated, the filter screen 205 is separated from the third annular sealing plate 202, and the filter screen 205 and the arc-shaped groove 206 are cleaned directly in the later stage.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, the reversing valve body assembly 1 adjusts the oil port position through the auxiliary moving assembly 3. The auxiliary moving assembly 3 includes a connecting plate 301, a hydraulic cylinder storage box 302 is fixed on the connecting plate 301, and a telescopic structure inside the hydraulic cylinder storage box 302 telescopically adjusts the position of the valve core 109. A storage groove 303 is opened inside the hydraulic cylinder storage box 302 and sealed by a sealing cover 304. A rotating screw 305 on one side of the storage groove 303 is threadedly connected to the threaded limiting groove 307 through a threaded connecting block 306 and is used to manually adjust the position of the valve core 109.

[0042] Furthermore, two sets of storage tanks 303 are provided, and the two sets of storage tanks 303 are opened in the hydraulic cylinder storage box 302. After the sealing cover 304 on the hydraulic cylinder storage box 302 is removed, the rotating screw 305 is directly stored. The connecting plate 301 is an annular hollow connecting plate. The annular hollow connecting plate 301 is threadedly connected to and communicates with the first annular sealing plate 1013. The second annular sealing plate 201 is connected to the first infusion tank 102. Noise reduction and sound absorption structures are embedded on the annular hollow connecting plate 301, the first annular sealing plate 1013 and the second annular sealing plate 201. The embedded noise reduction and sound absorption structures include sound-absorbing tubes and sound-absorbing cotton. The sound-absorbing cotton in the sound-absorbing tubes reduces the noise generated when the two-position three-way hydraulic control directional valve is working, thereby improving the quality of the working environment.

[0043] Preferably, the telescopic structure in this application is a hydraulic cylinder. The hydraulic rod on the hydraulic cylinder in the hydraulic cylinder storage box 302 is detached and installed from the connecting rod through a threaded connector. The rotating screw 305 passes through the limiting tube, which is opened in the hydraulic cylinder storage box 302 to ensure that the rotating screw 305 works normally.

[0044] like Figure 1 and Figure 3As shown, two sets of threaded limiting grooves 307 are provided, and the two sets of threaded limiting grooves 307 are provided on the valve core 109. The two sets of threaded limiting grooves 307 are symmetrically arranged about the central axis of the valve core 109. The rotating screw 305 is provided with two sections, and the two sections of the rotating screw 305 are threadedly connected. The entire device is electrically connected to the PLC.

[0045] Preferably, a handle is fixed on the right side of the rotating screw 305 to facilitate later operation of the rotating screw 305 and ensure the control quality when manually operating the two-position three-way hydraulic control directional valve;

[0046] In the further embodiment described above, the hydraulic cylinders inside the hydraulic cylinder storage box 302 are activated via a PLC. The hydraulic cylinders in the storage box 302 move their threaded connectors and connecting rods via piston rods. The moving connecting rods cause the valve core 109 to move to the right. Rotating the threaded connectors disassembles the piston rod and connecting rod, allowing manual opening of the sealing cover 304. The sealing cover 304 is suspended from the hydraulic cylinder storage box 302. The rotating screws 305 are then removed. Two sets of rotating screws 305 pass through and are rotated and fixed. The rotating screws 305 pass through the limiting tube. The threaded connecting block 306 on the rotating screw 305 is threaded into the threaded limiting groove 307 on the valve core 109. The position of the valve core 109 can be adjusted manually by pushing the handle on the rotating screw 305. In the event of a malfunction in the directional valve, the hydraulic cylinders inside the directional valve body assembly 1 can be manually addressed, preventing hydraulic oil flow issues during later maintenance, thus avoiding resource waste and increased costs.

[0047] Working principle: When using this two-position three-way hydraulic control directional valve, the external power supply is connected, and the auxiliary moving component 3 assists in ensuring the normal operation of the directional valve body assembly 1. When the directional valve body assembly 1 is working, the hydraulic cylinder discharged is automatically cleaned by the filter cleaning component 2, and the filter cleaning component 2 automatically cleans the filter screen 205. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0048] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention 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 limiting the scope of protection of the present invention.

[0049] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A two-position three-way hydraulically controlled directional valve, characterized in that, It includes a reversing valve body assembly (1), which is connected to a filter cleaning assembly (2) and used to filter impurities. The reversing valve body assembly (1) adjusts the oil port position through an auxiliary moving assembly (3). The reversing valve body assembly (1) includes a valve body shell (101), a first infusion groove (102) and a second infusion groove (103) are provided inside the valve body shell (101). The first infusion groove (102) is connected to the oil inlet (104) and the oil outlet (105) that pass through the valve body shell (101). The second infusion groove (103) is connected to the oil return port (1011) that passes through the valve body shell (101). A first spring (107) is provided between the spring seats (106) placed in the first infusion groove (102) for buffering and shock absorption. The first spring (107) is located on one side of the sealing plate (108). A valve core (109) passes through the second spring (1010) placed in the second infusion groove (103). A sealing ring (1012) is embedded on the valve core (109) to prevent air leakage. The auxiliary moving component (3) includes a connecting plate (301), a hydraulic cylinder storage box (302) is fixed on the connecting plate (301), and the position of the telescopic structure of the hydraulic cylinder storage box (302) is adjusted by telescopic adjustment of the valve core (109). A storage groove (303) is opened in the hydraulic cylinder storage box (302) and sealed by a sealing cover (304). A rotating screw (305) on one side of the storage groove (303) is threadedly connected to the threaded limiting groove (307) by a threaded connecting block (306) and is used to manually adjust the position of the valve core (109). The threaded limiting groove (307) has two sets. The two sets of threaded limiting grooves (307) are opened on the valve core (109). The two sets of threaded limiting grooves (307) are symmetrically arranged about the central axis of the valve core (109). The rotating screw (305) has two sections and the two sections of rotating screw (305) are threadedly connected.

2. The two-position three-way hydraulic control directional valve according to claim 1, characterized in that: The filter cleaning assembly (2) includes a second annular sealing plate (201), a third annular sealing plate (202) is threaded onto the second annular sealing plate (201), a filter screen (205) for filtering impurities is snapped onto the third annular sealing plate (202), and a double-headed motor body (203) fixed on the filter screen (205) drives the cleaning brush body (204) to clean the filter screen (205).

3. A two-position three-way hydraulically controlled directional valve according to claim 2, characterized in that: The third annular sealing plate (202) and the filter screen (205) are each provided in two sets, the two sets of filter screens (205) have different mesh densities, and the two sets of third annular sealing plates (202) are threadedly connected.

4. A two-position three-way hydraulically controlled directional valve according to claim 2, characterized in that: The lower side of the third annular sealing plate (202) has an arc-shaped groove (206) for settling impurities.

5. A two-position three-way hydraulically controlled directional valve according to claim 1, characterized in that: The entire device is electrically connected to the PLC.

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