Leakage-proof hydraulic reversing valve

Abstract

The utility model discloses a leakproof hydraulic reversing valve, and particularly relates to the technical field of hydraulic reversing valves, the leakproof hydraulic reversing valve comprises a valve body, two sides of the valve body are provided with four oil guide pipes, one end of each oil guide pipe is fixedly provided with a hemispherical filter screen, the outer surface of each oil guide pipe is fixedly provided with a flow dividing box, and a flow dividing cavity is arranged between each flow dividing box and the corresponding oil guide pipe; an impurity blocking device capable of blocking impurities and oil is arranged on the inner side of the flow dividing cavity; the impurity blocking device comprises a sliding groove, the sliding groove is formed in the upper end of the flow dividing box, a plurality of connecting blocks are fixedly arranged on the inner side of the flow dividing box, the upper ends of the connecting blocks are fixedly connected with the inner wall of the flow dividing box, the lower ends of the connecting blocks are fixedly connected with the outer surface of an oil guide pipe, and gaps are formed between the connecting blocks. And an impurity collecting device capable of collecting filtered impurities is arranged at the lower end of the flow dividing box. According to the utility model, the impurity blocking device is arranged, so that the flow of impurities can be blocked without influencing the normal work of the reversing valve when the impurities are cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic directional control valves, and more specifically, to a leak-proof hydraulic directional control valve. Background Technique

[0002] The hydraulic directional control valve is also known as a direction control valve. The hydraulic directional control valve is classified according to the number of passages controlled by the directional control valve: two-way, three-way, four-way, five-way, etc. By using the relative movement of the spool and the valve body, the oil passage is connected, cut off, or the direction of the oil flow is changed, so that the hydraulic actuator and its driving mechanism start, stop, or change the movement direction.

[0003] After retrieval, for example, a leak-proof hydraulic directional control valve is disclosed in the Chinese patent application with the application number CN202222807964.X. By setting a blocking mechanism, while the filter screen filters out solid impurities in the oil passing through the oil guide pipe, the oil will push the scraping blade to rotate during the flowing process. During the rotation of the scraping blade, it can scrape away the solid impurities accumulated on the surface of the filter screen, so as to reduce the probability of the filter screen being blocked. This can reduce the obstruction of solid impurities in the oil passing through the filter screen, and this can prevent solid impurities from adhering to the surface of the filter screen, so as to reduce the difficulty of subsequent cleaning by the staff. When the staff needs to clean the solid impurities inside the sealing cover, the staff only needs to close the oil guide pipe so that the oil cannot flow into the oil guide pipe normally, and then unscrew the sealing cover to discharge the remaining oil and solid impurities inside the oil guide pipe, without the staff removing the filter screen for cleaning, so as to reduce the cleaning difficulty of the staff; by setting a transparent observation window, the staff can observe the density of the solid impurities intercepted inside the oil guide pipe through the transparent observation window, without the staff estimating the retention situation of the solid impurities inside the oil guide pipe according to experience, further reducing the difficulty of the staff cleaning the solid impurities.

[0004] However, when the above technical solution is used, the solid impurities on the filter screen are scraped by the rotation of the scraping blade. However, the scraping blade has a large volume, which affects the flow of oil when rotating. And when cleaning the solid impurities in the above solution, it is necessary to close the oil guide pipe and unscrew the sealing cover, thus pausing the work of the hydraulic directional control valve and delaying the working efficiency of the hydraulic directional control valve. Content of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a leak-proof hydraulic directional control valve. The technical problem to be solved is that the large scraping blade affects the flow of oil, and cleaning the solid impurities requires pausing the work of the hydraulic directional control valve, which affects the working efficiency.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a leak-proof hydraulic directional control valve, including a valve body:

[0007] Four oil guide pipes are arranged on both sides of the valve body, a hemispherical filter is fixedly arranged at one end of the oil guide pipe, a diverter box is fixedly arranged on the outer surface of the oil guide pipe, and a diverter cavity is opened between the diverter box and the oil guide pipe;

[0008] An impurity blocking device capable of blocking impurities and oil is provided inside the diverter cavity, which is used to block the flow of impurities without affecting the normal operation of the reversing valve when cleaning impurities;

[0009] The impurity blocking device comprises a chute, which is provided at the upper end of the diverter box, a plurality of connection blocks are fixedly provided inside the diverter box, the upper end of the connection block is fixedly connected to the inner wall of the diverter box, the lower end of the connection block is fixedly connected to the outer surface of the oil guide pipe, a gap is provided between the plurality of connection blocks, a rotating circle is movably provided inside the diverter box, a plurality of blocking blocks are fixedly provided inside the rotating circle, and the size of the blocking blocks is larger than the size of the gap between the connection blocks;

[0010] The lower end of the diverter box is provided with an impurity collecting device capable of collecting the filtered impurities, which is used to collect the filtered impurities and oil and then separate the oil and impurities.

[0011] In a preferred embodiment, the inner wall of the rotating ring is movably connected to the outer wall of the oil guide pipe via a sealed bearing, and the rotating ring is located on one side of the connecting block.

[0012] In a preferred embodiment, the rotating circle and the blocking block are located on the outer surface of the oil guide pipe and one side of the connecting block, and a toggle rod is fixedly provided on the upper end of the rotating circle, and the toggle rod is located on the inner side of the slide groove.

[0013] In a preferred embodiment, the impurity collecting device comprises a filter box, which is fixedly arranged at the lower end of the diversion box, the upper end of the filter box is connected to the diversion cavity, and a limiting groove is provided on the inner side of the filter box.

[0014] In a preferred embodiment, a collecting box is movably provided inside the limiting groove, a sealing strip is fixedly provided on the outer surface of one side of the collecting box, and an oil filter plate is fixedly provided at the lower end of the inner side of the collecting box.

[0015] In a preferred embodiment, the lower end of the filter box is connected to an oil extraction pipe, one end of the oil extraction pipe is connected to the lower end of the connecting pipe, and a micro oil extraction pump is fixedly provided on the outer surface of the oil extraction pipe.

[0016] In a preferred embodiment, a connecting pipe is fixedly provided on one side of the diverter box, and a threaded groove is provided on the outer surface of one end of the connecting pipe.

[0017] Technical effects and advantages of the utility model:

[0018] 1. The utility model is provided with an impurity blocking device, which is conducive to blocking the flow of impurities without affecting the normal operation of the reversing valve when cleaning impurities, reducing the problem of suspending the operation of the hydraulic reversing valve when cleaning impurities, thereby improving the working efficiency of the hydraulic reversing valve, and filtering the oil entering the oil guide pipe through the hemispherical filter. Due to the semicircular shape of the hemispherical filter, the impurities and part of the oil flow into the diversion cavity while filtering the impurities, and part of the oil and impurities flow into the gap between the blocking blocks and the gap between the connecting blocks, thereby achieving the effect of filtering impurities. When it is necessary to clean the filtered impurities, the blocking block is used to block the gap between the connecting blocks by rotating the toggle rod, thereby blocking the flow of part of the oil and impurities, and at the same time does not affect the normal oil delivery of the oil guide pipe, thereby improving the working efficiency of the hydraulic reversing valve;

[0019] 2. The utility model is provided with an impurity collecting device, which is conducive to collecting impurities and oil after filtration, and then separating the oil and impurities, so that the impurities can be collected and easy to clean, and the filtered oil can be re-entered into the connecting pipe for transportation, and part of the oil and impurities flow into the filter box through the diversion cavity, and part of the oil and impurities are separated by the collecting box and the oil filter plate. The separated oil flows into the bottom of the filter box, is pumped out by a micro oil pump and pumped into the connecting pipe. When it is necessary to clean the impurities, part of the oil and impurities are stopped from entering the filter box by the impurity blocking device, and the oil in the filter box is pumped out by the micro oil pump, and then the collection box is pumped out for cleaning, thereby achieving an overall effect of easy cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the side section structure of the oil guide pipe of the utility model.

[0022] Figure 3 It is a schematic structural diagram of the impurity blocking device of the utility model.

[0023] Figure 4 It is a schematic structural diagram of the impurity collecting device of the utility model.

[0024] The accompanying drawings are marked as follows: 1. valve body; 2. impurity blocking device; 3. impurity collecting device; 4. connecting pipe; 5. threaded groove; 6. oil guide pipe; 7. diverter box; 8. hemispherical filter; 9. diverter chamber; 21. slide groove; 22. connecting block; 23. rotating circle; 24. blocking block; 25. toggle rod; 31. filter box; 32. limit groove; 33. collecting box; 34. sealing strip; 35. oil filter plate; 36. oil extraction pipe; 37. micro oil pump. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field of hydraulic reversing valves without creative work are within the scope of protection of the utility model.

[0026] like Figure 1 and 2 As shown, the utility model provides an anti-leakage hydraulic reversing valve, including a valve body 1: four oil guide pipes 6 are arranged on both sides of the valve body 1, a hemispherical filter screen 8 is fixedly arranged at one end of the oil guide pipe 6, a diverter box 7 is fixedly arranged on the outer surface of the oil guide pipe 6, a diverter cavity 9 is opened between the diverter box 7 and the oil guide pipe 6, a connecting pipe 4 is fixedly arranged on one side of the diverter box 7, and a threaded groove 5 is opened on the outer surface of one end of the connecting pipe 4.

[0027] In order to reduce the problem of suspending the operation of the hydraulic reversing valve when cleaning impurities, an impurity blocking device 2 capable of blocking impurities and oil is provided inside the diverter chamber 9, which is used to block the flow of impurities without affecting the normal operation of the reversing valve when cleaning impurities;

[0028] like Figure 3 As shown, the impurity blocking device 2 includes a chute 21, which is opened at the upper end of the diverter box 7, and a plurality of connecting blocks 22 are fixedly arranged on the inner side of the diverter box 7. The upper end of the connecting block 22 is fixedly connected to the inner wall of the diverter box 7, and the lower end of the connecting block 22 is fixedly connected to the outer surface of the oil guide pipe 6. A gap is opened between the plurality of connecting blocks 22, and a rotating circle 23 is movably arranged on the inner side of the diverter box 7. A plurality of blocking blocks 24 are fixedly arranged on the inner side of the rotating circle 23. The size of the blocking blocks 24 is larger than the size of the gap between the connecting blocks 22. The inner wall of the rotating circle 23 is movably connected to the outer wall of the oil guide pipe 6 through a sealing bearing. The rotating circle 23 is located on one side of the connecting block 22, and a The toggle rod 25 is located on the inner side of the slide groove 21. The oil entering the oil guide pipe 6 is filtered through the hemispherical filter 8. Due to the semicircular shape of the hemispherical filter 8, the impurities and part of the oil flow into the diversion chamber 9 while filtering. Part of the oil and impurities flow into the gap between the blocking blocks 24 and the gap between the connecting blocks 22, thereby achieving the effect of filtering impurities. When it is necessary to clean the filtered impurities, the toggle rod 25 is rotated to use the blocking block 24 to block the gap between the connecting blocks 22, thereby blocking the flow of part of the oil and impurities, and at the same time does not affect the normal oil delivery of the oil guide pipe 6, thereby improving the working efficiency of the hydraulic reversing valve.

[0029] Furthermore, in order to collect the impurities and facilitate cleaning, an impurity collecting device 3 capable of collecting the filtered impurities is provided at the lower end of the diverter box 7, which is used to collect the filtered impurities and oil, and then separate the oil from the impurities;

[0030] As Figure 4 shown, the impurity collection device 3 includes a filter box 31 which is fixedly arranged at the lower end of the shunt box 7. The upper end of the filter box 31 is communicated with the shunt cavity 9. A limiting groove 32 is formed inside the filter box 31. A collection box 33 is movably arranged inside the limiting groove 32. A sealing strip 34 is fixedly arranged on the outer surface of one side of the collection box 33. An oil filter plate 35 is fixedly arranged at the lower end inside the collection box 33. A suction oil pipe 36 is communicated with the lower end of the filter box 31. One end of the suction oil pipe 36 is communicated with the lower end of the connecting pipe 4. A micro suction oil pump 37 is fixedly arranged on the outer surface of the suction oil pipe 36. Part of the oil and impurities flow into the filter box 31 through the shunt cavity 9. The collection box 33 and the oil filter plate 35 separate part of the oil and impurities. The separated oil flows to the bottom of the filter box 31 and is pumped out by the micro suction oil pump 37 and pumped into the connecting pipe 4. When it is necessary to clean the impurities, the impurity blocking device 2 is used to stop part of the oil and impurities from entering the filter box 31. The oil in the filter box 31 is pumped out by the micro suction oil pump 37, and then the collection box 33 is taken out for cleaning, achieving the effect of being easy to clean as a whole.

[0031] The working principle is as follows: When the present utility model is in use, it is connected to the working instrument through the thread groove 5 of the connecting pipe 4, and the oil liquid is pumped into the guide oil pipe 6. The hemispherical filter screen 8 is used to filter the solid impurities in the oil. The filtered impurities and part of the oil flow into the shunt cavity 9, and then flow into the impurity collection device 3 for further filtration. When the solid impurities accumulate too much, the impurity blocking device 2 is used to block the flow of part of the oil and impurities, and then part of the oil is pumped out by the impurity collection device 3, and the collection box 33 is taken out to realize the cleaning of the impurities. As a whole, the practicability and working efficiency of the present utility model are improved, and the impurities in the oil liquid can be cleaned without stopping the operation of the present utility model.

[0032] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A leakage-proof hydraulic reversing valve, comprising a valve body (1), characterized in that: Four oil guide pipes (6) are provided on both sides of the valve body (1), a hemispherical filter (8) is fixedly provided at one end of the oil guide pipe (6), a flow diversion box (7) is fixedly provided on the outer surface of the oil guide pipe (6), and a flow diversion chamber (9) is provided between the flow diversion box (7) and the oil guide pipe (6); An impurity blocking device (2) capable of blocking impurities and oil is provided inside the diversion chamber (9) and is used to block the flow of impurities when cleaning the impurities; The impurity blocking device (2) comprises a slide groove (21), the slide groove (21) is provided at the upper end of the diverter box (7), a plurality of connection blocks (22) are fixedly provided inside the diverter box (7), the upper end of the connection block (22) is fixedly connected to the inner wall of the diverter box (7), the lower end of the connection block (22) is fixedly connected to the outer surface of the oil guide pipe (6), a gap is provided between the plurality of connection blocks (22), a rotating circle (23) is movably provided inside the diverter box (7), a plurality of blocking blocks (24) are fixedly provided inside the rotating circle (23), and the size of the blocking blocks (24) is larger than the size of the gaps between the connection blocks (22); The lower end of the diverter box (7) is provided with an impurity collecting device (3) capable of collecting filtered impurities, and is used to collect filtered impurities and oil.

2. The anti-leakage hydraulic reversing valve according to claim 1, characterized in that: The inner wall of the rotating ring (23) is movably connected to the outer wall of the oil guide pipe (6) via a sealing bearing, and the rotating ring (23) is located on one side of the connecting block (22).

3. The anti-leakage hydraulic reversing valve according to claim 2, characterized in that: A toggle rod (25) is fixedly provided on the upper end of the rotating circle (23), and the toggle rod (25) is located inside the sliding groove (21).

4. The anti-leakage hydraulic reversing valve according to claim 1, characterized in that: The impurity collecting device (3) comprises a filter box (31), the filter box (31) is fixedly arranged at the lower end of the diversion box (7), the upper end of the filter box (31) is connected to the diversion chamber (9), and a limiting groove (32) is provided on the inner side of the filter box (31).

5. The anti-leakage hydraulic reversing valve according to claim 4, characterized in that: A collecting box (33) is movably provided inside the limiting groove (32), a sealing strip (34) is fixedly provided on the outer surface of one side of the collecting box (33), and an oil filter plate (35) is fixedly provided at the lower end of the inner side of the collecting box (33).

6. The anti-leakage hydraulic reversing valve according to claim 4, characterized in that: The lower end of the filter box (31) is connected to an oil extraction pipe (36), one end of the oil extraction pipe (36) is connected to the lower end of the connecting pipe (4), and a micro oil extraction pump (37) is fixedly provided on the outer surface of the oil extraction pipe (36).

7. The anti-leakage hydraulic reversing valve according to claim 1, characterized in that: A connecting pipe (4) is fixedly provided on one side of the diverter box (7), and a thread groove (5) is provided on the outer surface of one end of the connecting pipe (4).

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