A split flow collecting valve

Abstract

The utility model provides a kind of shunt and current collection valve, including screw sleeve, valve sleeve, slide valve, first valve core and second valve core;The valve sleeve is provided with first passage, second passage and third passage for oil to pass, the first passage, second passage, third passage are sealed apart from each other;The slide valve is provided with fourth passage for oil to pass, the slide valve sleeve is in the valve sleeve, the slide valve and the valve sleeve clearance fit;The screw sleeve is fixedly installed with the valve sleeve;The one end of slide valve is limited in the first accommodating cavity of the one end of screw sleeve;Two ends of the slide valve are respectively fixedly installed with elastic pressure compensation valve.This application is arranged with a set of elastic pressure compensation valve at left and right ends, it is convenient to adjust compensation pressure separately, to change the proportion of shunt and current collection, with pressure compensation function, ensure the stability of inflow and outflow.

Description

Technical Field

[0001] This utility model relates to the field of valve manufacturing, and in particular to a flow divider and combiner valve. Background Technology

[0002] In systems with synchronized two hydraulic cylinders, a flow divider / combiner valve is typically used. In flow divider mode, the two hydraulic cylinders rise synchronously; in flow combiner mode, the two hydraulic cylinders descend synchronously. Conventional flow divider / combiner valves, at extremely low flow rates, exhibit even worse synchronization accuracy. This results in poor synchronization during the rising and falling of the hydraulic cylinders, leading to misalignment and, in severe cases, bending and deformation of the cylinder rods. Utility Model Content

[0003] The problem this invention aims to solve is to provide a flow divider and combiner valve to overcome the defects in the prior art where the synchronization accuracy of the hydraulic cylinder during rise and fall is poor, resulting in offset phenomenon, and in severe cases, bending and deformation of the hydraulic cylinder rod.

[0004] To solve the aforementioned technical problem, this utility model provides a flow divider / combiner valve, comprising a threaded sleeve, a valve sleeve, a slide valve, a first valve core, and a second valve core; the valve sleeve is provided with a first channel, a second channel, and a third channel for oil supply, the first channel, the second channel, and the third channel being mutually sealed and separated; the slide valve is provided with a fourth channel for oil supply, the slide valve being fitted inside the valve sleeve with a clearance fit; the threaded sleeve is fixedly installed to the valve sleeve; one end of the slide valve is confined within a first receiving cavity at one end of the threaded sleeve; elastic pressure compensation valves are fixedly installed at both ends of the slide valve; the first valve core and the second valve core are movably installed on both sides inside the slide valve, one end of the first valve core and the second valve core engaging with the elastic pressure compensation valve; when oil enters the slide valve from the first channel, the first valve core and the second valve core move, achieving pressure compensation under the action of the elastic pressure compensation valve.

[0005] Preferably, the spool valve and the first valve core form a second receiving cavity at their junction, and the spool valve and the second valve core form a third receiving cavity. The two elastic pressure compensation valves are respectively installed in the second receiving cavity and the third receiving cavity. The elastic pressure compensation valve includes a first spring seat, a second spring seat, a spring, a first retaining ring, and a second retaining ring. One end of the spring abuts against the first spring seat, and the other end abuts against the second spring seat. The second spring seat is fixedly installed on the outside of the second valve core.

[0006] Preferably, the second valve core is provided with a first valve core radial hole, a first valve core blind hole, a second valve core radial hole and a first valve core annular groove; the first valve core radial hole, the first valve core blind hole, the second valve core radial hole and the first valve core annular groove are connected in sequence; the slide valve is provided with a first slide valve radial hole, which corresponds to the first valve core annular groove.

[0007] Preferably, the first valve core is provided with a third valve core radial hole, a second valve core blind hole, a fourth valve core radial hole, and a second valve core annular groove; the third valve core radial hole, the second valve core blind hole, the fourth valve core radial hole, and the second valve core annular groove are connected in sequence; the slide valve is also provided with a second slide valve radial hole, which corresponds to the second valve core annular groove.

[0008] Preferably, a first valve sleeve inner groove and a second valve sleeve inner groove are respectively provided on the valve sleeve and below the second channel and the third channel; the first valve sleeve inner groove and the second valve sleeve inner groove correspond to the second slide valve radial hole and the first slide valve radial hole, respectively.

[0009] Preferably, one end of the slide valve is provided with a slide valve step, and the slide valve step is limited by the end face of the valve sleeve.

[0010] Preferably, the stroke of the slide valve is consistent with the width of the inner groove of the first valve sleeve and the inner groove of the second valve sleeve.

[0011] Preferably, the fourth channel includes a slide valve annular groove and a slide valve oblong orifice.

[0012] Preferably, the threaded sleeve and the valve sleeve are fixed by a third snap ring and sealed by a first sealing ring.

[0013] Preferably, the valve sleeve is further provided with a second sealing ring, a third sealing ring and a fourth sealing ring, and the screw sleeve is further provided with a fifth sealing ring.

[0014] Compared with the prior art, the present invention has the following advantages: The present application is ingeniously designed, with a set of elastic pressure compensation valves arranged at each of the left and right ends, which makes it easy to adjust the compensation pressure individually, thereby changing the ratio of flow splitting and flow collection, and has a pressure compensation function to ensure the stability of inflow and outflow. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a schematic diagram of the structure of a flow divider / combiner valve according to the present invention; Figure 2 This is a half-sectional view of a flow divider / combiner valve according to the present invention; Figure 3 for Figure 2 A magnified view of part A in the image; Figure 4 for Figure 2 A magnified view of part B in the image; Figure 5 for Figure 2 A magnified view of part C; Figure 6 for Figure 2 A magnified view of part D; Figure 7 for Figure 2 A magnified view of part E in the image; Figure 8 for Figure 2 A magnified view of part of F; Figure 9 This is a schematic diagram of the valve sleeve structure; Figure 10 This is a schematic diagram of the slide valve. Figure 11 This is an exploded view of a flow divider / combiner valve according to this utility model; Figure 12 This is a schematic diagram of the working structure of a flow divider / combiner valve according to this utility model.

[0017] Drawing number descriptions: Screw sleeve 1, first receiving cavity 101, external thread 102, fifth sealing ring 103, valve sleeve 2, first channel 201, second channel 202, third channel 203, first valve sleeve inner groove 204, second valve sleeve inner groove 205, end face 206, second sealing ring 207, third sealing ring 208, fourth sealing ring 209, slide valve 3, fourth channel 301, slide valve annular groove 3011, several slide valve oblong holes 3012, second receiving cavity 302, third receiving cavity 303, first slide valve radial hole 304, second slide valve radial hole 305. 05, slide valve step 306, first valve core 4, third valve core radial hole 401, second valve core blind hole 402, fourth valve core radial hole 403, second valve core annular groove 404, second valve core 5, first valve core radial hole 501, first valve core blind hole 502, second valve core radial hole 503, first valve core annular groove 504, elastic pressure compensation valve 6, first spring seat 601, second spring seat 602, spring 603, first snap ring 604, second snap ring 605, third snap ring 7, first sealing ring 8, oil port a, oil port b, oil port c, oil port d. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0020] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0021] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0022] Example: Please see Figure 1-12 A flow divider / combiner valve includes a threaded sleeve 1, a valve sleeve 2, a slide valve 3, a first valve core 4, and a second valve core 5. The valve sleeve 2 has a first channel 201, a second channel 202, and a third channel 203 for oil supply, which are mutually sealed and separated. The slide valve 3 has a fourth channel 301 for oil supply and is fitted inside the valve sleeve 2 with a clearance fit. The threaded sleeve 1 is fixedly installed to the valve sleeve 2. One end of the slide valve 3 is confined within a first receiving cavity 101 at one end of the threaded sleeve 1. Elastic pressure compensation valves 6 are fixedly installed at both ends of the slide valve 3. The first valve core 4 and the second valve core 5 are sealed and movably installed on both sides inside the slide valve 3, with one end of each valve core engaging with the elastic pressure compensation valve 6. When oil enters the slide valve 3 from the first channel 201, the first valve core 4 can move to the left and the second valve core 5 can move to the right, achieving pressure compensation under the action of the elastic pressure compensation valve 6.

[0023] The first valve core 4 and the second valve core 5 are sealed and installed on both sides inside the slide valve 3. The first valve core 4 and the second valve core 5 are installed on both sides inside the slide valve 3 in a piston-like manner.

[0024] In this embodiment, a plurality of first channels 201, second channels 202 and third channels 203 are evenly arranged along the outer wall. The first channels 201, second channels 202 and third channels 203 are separated by second sealing rings 207, third sealing rings 208, fourth sealing rings 209 and fifth sealing rings 103.

[0025] The structure of the elastic pressure compensation valve 6 is described in detail. There are two elastic pressure compensation valves 6, two on each side. This embodiment only describes one. The joint between the slide valve 3 and the first valve core 4 forms a second receiving cavity 302, and the joint between the slide valve 3 and the second valve core 5 forms a third receiving cavity 303. The two elastic pressure compensation valves 6 are respectively installed in the second receiving cavity 302 and the third receiving cavity 303. The elastic pressure compensation valve 6 includes a first spring seat 601, a second spring seat 602, a spring 603, a first retaining ring 604, and a second retaining ring 605. One end of the spring 603 abuts against the first spring seat 601, and the other end abuts against the second spring seat 602. The second spring seat 602 is fixedly installed on the outside of the second valve core 5.

[0026] Furthermore, for ease of installation, the second spring seat 602 is fixed by the first snap ring 604 and the second snap ring 605. The first snap ring 604 is installed between the second spring seat 602 and the second valve core 5, and the second snap ring 605 is installed between the second spring seat 602 and the slide valve 3.

[0027] In this embodiment, the second valve core 5 is provided with a plurality of first valve core radial holes 501, a first valve core blind hole 502, a plurality of second valve core radial holes 503 and a plurality of first valve core annular grooves 504; the first valve core radial holes 501, the first valve core blind hole 502, the second valve core radial holes 503 and the first valve core annular grooves 504 are connected in sequence; the slide valve 3 is provided with a plurality of first slide valve radial holes 304, the first slide valve radial holes 304 corresponding to the first valve core annular grooves 504.

[0028] Furthermore, specifically describing the oil passage, the first valve core 4 is provided with a plurality of third valve core radial holes 401, a second valve core blind hole 402, a plurality of fourth valve core radial holes 403, and a plurality of second valve core annular grooves 404; the third valve core radial holes 401, the second valve core blind holes 402, the fourth valve core radial holes 403, and the second valve core annular grooves 404 are connected in sequence; the slide valve 3 is also provided with a plurality of second slide valve radial holes 305, the second slide valve radial holes 305 corresponding to the second valve core annular grooves 404.

[0029] To ensure that the oil circuit is not blocked, a first valve sleeve inner groove 204 and a second valve sleeve inner groove 205 are respectively provided on the valve sleeve 2 and below the second channel 202 and the third channel 203; the first valve sleeve inner groove 204 and the second valve sleeve inner groove 205 correspond to the second slide valve radial hole 305 and the first slide valve radial hole 304, respectively.

[0030] It is worth mentioning that the first spool valve radial holes 304 are arranged in two symmetrical rows, and the second spool valve radial holes 305 are also arranged in two symmetrical rows. Two rows of spool valve radial holes, namely the first spool valve radial holes 304 and the second spool valve radial holes 305, are symmetrically arranged on the outer circumference of the spool valve 3. These two rows of first spool valve radial holes 304 and two rows of second spool valve radial holes 305 are aligned with the inner grooves 204 and 205 of the first valve sleeve. The left and right stroke distances of the spool valve 3 correspond to the widths of the inner grooves 204 and 205 of the first and second valve sleeves. This symmetrical arrangement must ensure that the oil passages of the valve sleeve 2 are always connected to the oil passages of the first valve core blind hole 502 and the second valve core blind hole 402, ensuring that the oil passages are not blocked.

[0031] In order to limit the position of the slide valve 3, a slide valve step 306 is provided at one end of the slide valve 3, and the slide valve step 306 is limited by the end face 206 of the valve sleeve 2.

[0032] To further ensure that the oil circuit will not be blocked, the stroke of the slide valve 3 is consistent with the width of the inner groove 204 of the first valve sleeve and the inner groove 205 of the second valve sleeve.

[0033] To facilitate the tightening operation of the entire valve, the sleeve 1 is provided with an external thread 102.

[0034] Specifically, for easy sealing installation, the screw sleeve 1 and valve sleeve 2 are fixed by the third snap ring 7 and sealed by the first sealing ring 8.

[0035] In order to seal and separate the first channel 201, the second channel 202 and the third channel 203 from each other, the valve sleeve 2 is also provided with a second sealing ring 207, a third sealing ring 208 and a fourth sealing ring 209, and the screw sleeve 1 is also provided with a fifth sealing ring 103.

[0036] To increase oil intake efficiency, the fourth channel 301 includes a slide valve annular groove 3011 and several slide valve oblong holes 3012.

[0037] This utility model adopts a threaded insert structure, and the oil port definitions are the same as those of existing conventional products. Oil port c is the main inlet for diversion and the main outlet for collection, located in the middle of the insertion hole. Oil port b is on the right and oil port d is on the left. Oil port a on the right end face is not used. The second sealing ring 207, the third sealing ring 208, and the fourth sealing ring 209 divide the outside of the valve sleeve 2 into three radial oil ports b, 3, and 4 (that is, the third channel 203, the first channel 201, and the second channel 202).

[0038] The initial state of this utility model is as follows: Figure 2 As shown, under the action of the first retaining ring 604, the second retaining ring 605, and the third retaining ring 7, all parts are axially positioned. In the diversion mode, as... Figure 12 As shown, pressurized oil enters the first channel 201 from port c, passes through the spool valve annular groove 3011 and the spool valve waist-shaped hole 3012, and enters the interior of the spool valve 3. The first valve core 4 and the second valve core 5 move to the left and right ends, then to the right into the first valve core radial hole 501 and the first valve core blind hole 502, then through the second valve core radial hole 503 into the first valve core annular groove 504 and the first spool valve radial hole 304, into the second valve sleeve inner groove 205 and the third channel 203, and finally into port b. After entering the interior of the spool valve 3 from port c, the pressurized oil flows to the left along the same path as to the right, and finally enters port d, forming a complete oil flow path for the diversion function. In the flow-collecting mode, pressurized oil from ports b and 4 converges into port c in the opposite direction of the diversion path.

[0039] The first valve core radial hole 501 and the third valve core radial hole 401 are inlet throttling holes in the flow splitting mode and outlet throttling holes in the flow combining mode. The flow area of ​​these holes can be determined based on the formulas for the maximum flow rate and flow-pressure difference in the flow splitting mode. The first valve core annular groove 504 and the first slide valve radial hole 304, as well as the second valve core annular groove 404 and the second slide valve radial hole 305, are arranged symmetrically in the middle. The width of the annular groove is determined by the size of the area of ​​the slide valve radial hole it covers.

[0040] Spring 303 is arranged on the end face of the blind hole of the valve core, allowing the second valve core 5 and the first valve core 4 to move to the left and right, respectively, both of which can compress the spring to achieve the pressure compensation function. Changing the spring specifications can change the compensation pressure, thereby changing the percentage of flow splitting and combining.

[0041] Two rows of radial holes are symmetrically arranged on the outer circle of the slide valve 3. The first radial hole 304 consists of two holes side by side close to each other, and the second radial hole 305 also consists of two holes side by side close to each other. These two rows of radial holes are symmetrically arranged with the inner grooves 204 and 205 of the first and second valve sleeves. The left and right stroke distances of the slide valve 3 correspond to the widths of the inner grooves 204 and 205 of the first and second valve sleeves. It is necessary to ensure that this symmetrical arrangement always connects the oil passage of the valve sleeve 2 and the oil passages of the blind holes 502 and 402 of the first and second valve cores to ensure that the oil passage is not blocked.

[0042] The combination of two sets of elastic pressure compensation valves 6, with one set of elastic pressure compensation valve 6 arranged at each of the left and right ends of the slide valve waist-shaped hole 3012, facilitates individual adjustment of the compensation pressure, thereby changing the ratio of flow splitting and flow collection.

[0043] Spring 603, together with two spring seats and two snap rings, allows the second valve core 5 and the first valve core 4 to move freely left and right. This gives the second valve core 5 and the first valve core 4 pressure compensation function in both the diversion and collection directions, ensuring the stability of the inflow and outflow.

[0044] The inner groove 204 of the first valve sleeve and the inner groove 205 of the second valve sleeve respectively cooperate with the radial hole 305 of the second spool valve and the radial hole 304 of the first spool valve to ensure that when the spool valve 3 moves to its extreme position, the radial hole 305 of the second spool valve, the radial hole 304 of the first spool valve, the inner groove 204 of the first valve sleeve, and the inner groove 205 of the second valve sleeve will not be completely closed, thus ensuring unobstructed oil passage and preventing the valve port from being closed.

[0045] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A flow divider / combiner valve, characterized in that: Includes a screw sleeve (1), a valve sleeve (2), a slide valve (3), a first valve core (4), and a second valve core (5); The valve sleeve (2) is provided with a first channel (201), a second channel (202) and a third channel (203) through which oil is supplied, and the first channel (201), the second channel (202) and the third channel (203) are sealed and separated from each other; The slide valve (3) is provided with a fourth channel (301) for supplying oil. The slide valve (3) is fitted inside the valve sleeve (2), and the slide valve (3) and the valve sleeve (2) are in clearance fit; The screw sleeve (1) is fixedly installed with the valve sleeve (2); One end of the slide valve (3) is restricted within the first receiving cavity (101) at one end of the threaded sleeve (1); The slide valve (3) is fixedly installed with elastic pressure compensation valves (6) at both ends. The first valve core (4) and the second valve core (5) are movably installed on both sides inside the slide valve (3), and one end of the first valve core (4) and the second valve core (5) cooperates with the elastic pressure compensation valve (6). When oil enters the slide valve (3) from the first channel (201), the first valve core (4) and the second valve core (5) move, and pressure compensation is achieved under the action of the elastic pressure compensation valve (6).

2. A flow divider / combiner valve according to claim 1, characterized in that: The slide valve (3) forms a second receiving cavity (302) at the junction with the first valve core (4), and the slide valve (3) forms a third receiving cavity (303) at the junction with the second valve core (5). The two elastic pressure compensation valves (6) are respectively installed in the second receiving cavity (302) and the third receiving cavity (303). The elastic pressure compensation valve (6) includes a first spring seat (601), a second spring seat (602), a spring (603), a first snap ring (604), and a second snap ring (605); One end of the spring (603) abuts against the first spring seat (601), and the other end abuts against the second spring seat (602); The second spring seat (602) is fixedly installed on the outside of the second valve core (5).

3. A flow divider / combiner valve according to claim 1, characterized in that: The second valve core (5) is provided with a first valve core radial hole (501), a first valve core blind hole (502), a second valve core radial hole (503) and a first valve core annular groove (504); the first valve core radial hole (501), the first valve core blind hole (502), the second valve core radial hole (503) and the first valve core annular groove (504) are connected in sequence; The slide valve (3) is provided with a first slide valve radial hole (304), which corresponds to the first valve core annular groove (504).

4. A flow divider / combiner valve according to claim 3, characterized in that: The first valve core (4) is provided with a third valve core radial hole (401), a second valve core blind hole (402), a fourth valve core radial hole (403), and a second valve core annular groove (404); the third valve core radial hole (401), the second valve core blind hole (402), the fourth valve core radial hole (403), and the second valve core annular groove (404) are connected in sequence. The slide valve (3) is also provided with a second slide valve radial hole (305), which corresponds to the second valve core annular groove (404).

5. A flow divider / combiner valve according to claim 4, characterized in that: The valve sleeve (2) is provided with a first valve sleeve inner groove (204) and a second valve sleeve inner groove (205) respectively located on the second channel (202) and below the third channel (203); the first valve sleeve inner groove (204) and the second valve sleeve inner groove (205) correspond to the second slide valve radial hole (305) and the first slide valve radial hole (304) respectively.

6. A flow divider / combiner valve according to claim 5, characterized in that: The slide valve (3) has a slide valve step (306) at one end, and the slide valve step (306) is limited by the end face (206) of the valve sleeve (2).

7. A flow divider / combiner valve according to claim 6, characterized in that: The stroke of the slide valve (3) is consistent with the width of the inner groove of the first valve sleeve (204) and the inner groove of the second valve sleeve (205).

8. A flow divider / combiner valve according to claim 1, characterized in that: The fourth channel (301) includes a slide valve annular groove (3011) and a slide valve waist-shaped hole (3012).

9. A flow divider / combiner valve according to claim 1, characterized in that: The threaded sleeve (1) and valve sleeve (2) are fixed by the third snap ring (7) and sealed by the first sealing ring (8).

10. A flow divider / combiner valve according to claim 1, characterized in that: The valve sleeve (2) is further provided with a second sealing ring (207), a third sealing ring (208) and a fourth sealing ring (209), and the screw sleeve (1) is further provided with a fifth sealing ring (103).

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