Multi-way reversing valve

Abstract

The utility model discloses a multi-way reversing valve which comprises an oil return groove, a rotating bucket small cavity, a first oil groove, a rotating bucket large cavity, a second oil groove, a movable arm large cavity, a third oil groove, a movable arm small cavity, a fourth oil groove, a valve body, a one-way valve, a main safety valve, a rotating bucket valve rod assembly and a movable arm valve rod assembly. A fourth oil groove is formed in the valve body and located on the outer side of the oil return groove, the one-way valve is fixedly installed on the top of the right side of the valve body, and the main safety valve is fixedly installed on the top of the left side of the valve body. The multi-way reversing valve provided by the utility model has the advantages of good clamping stagnation prevention effect and long service life, and solves the problems that the existing multi-way reversing valve for the engineering machinery has a clamping stagnation phenomenon in the working process, and a large part of the clamping stagnation phenomenon is caused by the clamping stagnation of the valve rod and the valve body when the valve rod slides under the action of hydraulic pressure due to small particles in oil and the slender valve rod, so that the service life of the multi-way reversing valve is influenced. And the working reliability and the working life of the multi-way reversing valve are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-way reversing valves, in particular to a multi-way reversing valve. Background Art

[0002] At present, the multi-way reversing valve used in engineering machinery has a stuck phenomenon during operation. A large part of the problem is that the tiny particles in the oil and the slender valve stem cause the valve stem to get stuck with the valve body when sliding under the action of liquid pressure, which reduces the working reliability and service life of the multi-way reversing valve. Some multi-way reversing valves reduce the sticking failure by increasing the matching clearance between the overall valve stem and the valve body, but this practice will lead to an increase in the internal leakage of the multi-way reversing valve. Therefore, there is an urgent need for a multi-way reversing valve to overcome the above defects. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-way reversing valve with the advantages of good anti-jamming effect and long service life, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-way reversing valve, comprising an oil return groove, a small chamber of a bucket, a first oil groove, a large chamber of a bucket, a second oil groove, a large chamber of an arm, a third oil groove, a small chamber of an arm, a fourth oil groove, a valve body, a one-way valve, a main safety valve, a bucket valve stem assembly and an arm valve stem assembly, the oil return groove is provided inside the valve body, a fourth oil groove is provided inside the valve body and outside the oil return groove, the one-way valve is fixedly mounted on the top of the right side of the valve body, the main safety valve is fixedly mounted on the top of the left side of the valve body, the bucket valve stem assembly is arranged inside the valve body, the The arm valve stem assembly is arranged at the bottom of the valve body, and the bucket valve stem assembly includes a bucket valve stem body, a bucket valve stem D2 step, a bucket valve stem C2 step, a bucket valve stem B2 step, a bucket valve stem A2 step and a first pressure groove. The boom valve stem assembly includes a boom valve stem A1 step, a boom valve stem B1 step, a boom valve stem C1 step, a boom valve stem D1 step, a boom valve stem E1 step, a boom valve stem body and a second pressure groove. A boom large cavity is opened inside the valve body and on the outside of the boom valve stem A1 step. A third oil groove is opened inside the valve body and on the outside of the boom valve stem B1 step.

[0005] Furthermore, a small boom cavity is provided inside the valve body and outside the boom valve stem E1 step, and a large bucket cavity is provided inside the valve body and on the left side of the bucket valve stem B2 step.

[0006] Furthermore, a second oil groove is provided inside the valve body and outside the step B2 of the bucket valve stem, and the first oil groove is provided inside the valve body and outside the step C2 of the bucket valve stem.

[0007] Furthermore, the small bucket cavity is opened inside the valve body and is located on the left side of the bucket valve stem D2 step, and the boom valve stem A1 step, boom valve stem B1 step, boom valve stem C1 step, boom valve stem D1 step and boom valve stem E1 step are all fixedly mounted on the surface of the boom valve stem body.

[0008] Furthermore, the bucket valve stem A2 step, bucket valve stem B2 step, bucket valve stem C2 step and bucket valve stem D2 step are all fixedly mounted on the surface of the bucket valve stem body, and the surfaces of the boom valve stem A1 step and boom valve stem B1 step are provided with a plurality of second pressure grooves.

[0009] Furthermore, a plurality of second compression grooves are formed on the surfaces of the boom valve stem C1 step and the boom valve stem D1 step, and a plurality of second compression grooves are formed on the surface of the boom valve stem E1 step.

[0010] Furthermore, a plurality of first pressure grooves are provided on the surfaces of the bucket valve stem A2 step and the bucket valve stem D2 step, and a plurality of first pressure grooves are provided on the surfaces of the bucket valve stem B2 step and the bucket valve stem C2 step.

[0011] In summary, due to the adoption of the above technology, the beneficial effects of the utility model are:

[0012] The utility model adds three second pressure grooves on the surface of the boom valve stem E1 step compared with the existing structure, and adds one second pressure groove on the surface of the boom valve stem D1 step and the boom valve stem C1 step compared with the existing structure. At the same time, the surfaces of the boom valve stem A1 step and the boom valve stem B1 step add two second pressure grooves compared with the existing structure. During operation, when the multi-way valve assembly is working and moving, when the boom valve stem body and the bucket valve stem body are in a neutral position, the hydraulic oil enters directly from the oil inlet, flows directly into the interior of the return oil tank along the fourth oil tank, and finally returns to the oil tank. When the boom is lifted, the boom valve stem body moves to the right, and both sides of the boom entering the fourth oil tank are closed. The hydraulic oil flows from the third oil tank to The hydraulic oil in the boom's large cavity and the boom's small cavity flows into the inner cavity of the return oil tank. When the boom descends, the boom valve stem body moves to the left, the left side of the fourth oil tank is closed, and the hydraulic oil enters the inner cavity of the boom's small cavity from the fourth oil tank on the right, and the hydraulic oil in the boom's large cavity flows into the interior of the return oil tank. When the bucket is retracted, the bucket valve stem body moves to the right, and the hydraulic oil flows from the second oil tank to the interior of the bucket's large cavity. At the same time, the first oil tank is closed, and the hydraulic oil in the bucket's small cavity flows into the interior of the return oil tank. When the bucket is tipped, the bucket valve stem body moves to the left, and the hydraulic oil flows from the first oil tank to the bucket's small cavity. The second oil tank is then closed, and the hydraulic oil in the bucket's large cavity flows into the interior of the return oil tank. It has the advantages of good anti-stuck effect and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic structural diagram of the boom valve stem assembly of the utility model;

[0015] Figure 3 This is a structural diagram of the bucket valve stem assembly of the utility model.

[0016] In the figure: 1. return oil groove; 2. bucket small cavity; 3. first oil groove; 4. bucket large cavity; 5. second oil groove; 6. boom large cavity; 7. third oil groove; 8. boom small cavity; 9. fourth oil groove; 10. valve body; 11. check valve; 12. main safety valve; 13. bucket valve stem assembly; 131. bucket valve stem body; 132. bucket valve stem D2 step; 133. bucket valve stem C2 step; 134. bucket valve stem B2 step; 135. bucket valve stem A2 step; 136. first pressure groove; 14. boom valve stem assembly; 141. boom valve stem A1 step; 142. boom valve stem B1 step; 143. boom valve stem C1 step; 144. boom valve stem D1 step; 145. boom valve stem E1 step; 146. boom valve stem body; 147. second pressure groove. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] The utility model provides Figure 1-3As shown, a multi-way reversing valve includes an oil return groove 1, a small bucket cavity 2, a first oil groove 3, a large bucket cavity 4, a second oil groove 5, a large arm cavity 6, a third oil groove 7, a small arm cavity 8, a fourth oil groove 9, a valve body 10, a one-way valve 11, a main safety valve 12, a bucket valve stem assembly 13 and an arm valve stem assembly 14. The oil return groove 1 is opened inside the valve body 10, and a fourth oil groove 9 is opened inside the valve body 10 and outside the oil return groove 1. The one-way valve 11 is fixedly installed on the top of the right side of the valve body 10, and the main safety valve 12 is fixedly installed on the top of the left side of the valve body 10. The bucket valve stem assembly 13 is arranged inside the valve body 10, and the arm valve stem assembly 14 is arranged at the bottom of the valve body 10. The bucket valve stem assembly 13 includes a bucket valve stem body 131, a bucket valve stem D2 step 132, a bucket valve stem C2 step 133, a bucket valve stem B2 step 134, a bucket valve stem A2 step 135 and a first pressure groove 136. The boom valve stem assembly 14 includes a boom valve stem A1 step 141, a boom valve stem B1 step 142, a boom valve stem C1 step 143, a boom valve stem D1 step 144, a boom valve stem E1 step 145, a boom valve stem body 146 and a second pressure groove 147. A boom large cavity 6 is defined inside the valve body 10 and located outside the boom valve stem A1 step 141. A third oil groove 7 is defined inside the valve body 10 and located outside the boom valve stem B1 step 142.

[0019] More specifically, by providing the valve body 10, it is convenient to install and fix the overall components. During operation, when the multi-way valve assembly is working and moving, when the boom valve stem body 146 and the bucket valve stem body 131 are in the neutral position, the hydraulic oil enters directly from the oil inlet, flows directly into the interior of the return oil tank 1 along the fourth oil groove 9, and finally returns to the oil tank. When the boom is lifted, the boom valve stem body 146 moves to the right, and both sides of the boom entering the fourth oil groove 9 are closed. The hydraulic oil flows from the third oil groove 7 to the boom large cavity 6, and the hydraulic oil in the boom small cavity 8 flows into the inner cavity of the return oil tank 1; when the boom is lowered, the boom valve stem body 146 moves to the left, and the fourth oil groove 9 is closed. The left side of the groove 9 is closed, and the hydraulic oil enters the inner cavity of the boom small cavity 8 from the fourth oil groove 9 on the right, and the hydraulic oil in the boom large cavity 6 flows into the interior of the return oil groove 1. When the bucket is retracted, the bucket valve stem body 131 moves to the right, and the hydraulic oil flows from the second oil groove 5 to the interior of the bucket large cavity 4. At the same time, the first oil groove 3 is closed, and the hydraulic oil in the bucket small cavity 2 flows into the interior of the return oil groove 1. When the bucket is tipped, the bucket valve stem body 131 moves to the left, and the hydraulic oil flows from the first oil groove 3 to the bucket small cavity 2. The second oil groove 5 is then closed, and the hydraulic oil in the bucket large cavity 4 flows into the interior of the return oil groove 1, which has the advantages of good anti-stuck effect and long service life.

[0020] In some embodiments, a small boom cavity 8 is provided inside the valve body 10 and located on the outside of the boom valve stem E1 step 145, and a large bucket cavity 4 is provided inside the valve body 10 and located on the left side of the bucket valve stem B2 step 134. More specifically, by providing the small boom cavity 8, hydraulic oil can be introduced into the inner cavity of the return oil tank 1.

[0021] In some embodiments, a second oil groove 5 is provided inside the valve body 10 and outside the step B2 134 of the bucket valve stem. The first oil groove 3 is provided inside the valve body 10 and outside the step C2 133 of the bucket valve stem. More specifically, by providing the second oil groove 5, hydraulic oil can be introduced into the interior of the bucket large cavity 4.

[0022] In some embodiments, the bucket small cavity 2 is opened inside the valve body 10 and is located on the left side of the bucket valve stem D2 step 132, and the boom valve stem A1 step 141, boom valve stem B1 step 142, boom valve stem C1 step 143, boom valve stem D1 step 144 and boom valve stem E1 step 145 are all fixedly mounted on the surface of the boom valve stem body 146. More specifically, by arranging the boom valve stem A1 step 141, boom valve stem B1 step 142, boom valve stem C1 step 143, boom valve stem D1 step 144, boom valve stem E1 step 145 and boom valve stem body 146, more tiny particles in the oil can be pre-stored in the groove, and when the boom valve stem body 146 changes direction, the high-speed liquid flow at the valve port will bring them into the interior of the return oil groove 1, and finally flow back to the oil tank for unified treatment.

[0023] In some embodiments, the bucket valve stem A2 step 135, the bucket valve stem B2 step 134, the bucket valve stem C2 step 133 and the bucket valve stem D2 step 132 are all fixedly mounted on the surface of the bucket valve stem body 131, and the surfaces of the boom valve stem A1 step 141 and the boom valve stem B1 step 142 are provided with a plurality of second pressure grooves 147. More specifically, by providing the bucket valve stem A2 step 135, the bucket valve stem B2 step 134, the bucket valve stem C2 step 133, the bucket valve stem D2 step 132 and the bucket valve stem body 131, the contact friction between the bucket valve stem body 131 and the inner hole wall of the valve body 10 can be reduced, thereby reducing the friction resistance of the bucket valve stem body 131 during operation.

[0024] In some embodiments, the surfaces of the boom valve stem C1 step 143 and the boom valve stem D1 step 144 are provided with multiple second pressure grooves 147, and the surface of the boom valve stem E1 step 145 is provided with multiple second pressure grooves 147. More specifically, by providing the first pressure groove 136 and the second pressure groove 147, the boom valve stem body 146 and the bucket valve stem body 131 can be better maintained in the middle position, so that it is not easy for the boom valve stem body 146 and the bucket valve stem body 131 to be stuck to one side, so that the boom valve stem body 146 and the bucket valve stem body 131 are always surrounded by oil to maintain a good lubrication state, and it also has the effect of reducing internal leakage.

[0025] In some embodiments, the surfaces of the bucket valve stem A2 step 135 and the bucket valve stem D2 step 132 are provided with multiple first pressure grooves 136, and the surfaces of the bucket valve stem B2 step 134 and the bucket valve stem C2 step 133 are provided with multiple first pressure grooves 136. More specifically, by providing the boom valve stem E1 step 145, three second pressure grooves 147 are added to its surface compared with the existing structure, and one second pressure groove 147 is added to the surfaces of the boom valve stem D1 step 144 and the boom valve stem C1 step 143 compared with the existing structure. At the same time, two second pressure grooves 147 are added to the surfaces of the boom valve stem A1 step 141 and the boom valve stem B1 step 142 compared with the existing structure.

[0026] Working principle:

[0027] Step 1: During operation, when the multi-way valve assembly is in motion, when the boom valve stem body 146 and the bucket valve stem body 131 are in the neutral position, the hydraulic oil enters directly from the oil inlet, flows directly into the interior of the return oil tank 1 along the fourth oil groove 9, and finally returns to the oil tank. When the boom is lifted, the boom valve stem body 146 moves to the right, and both sides of the boom inlet of the fourth oil groove 9 are closed. The hydraulic oil flows from the third oil groove 7 to the boom large cavity 6, and the hydraulic oil in the boom small cavity 8 flows into the inner cavity of the return oil tank 1; when the boom is lowered, the boom valve stem body 146 moves to the left, and the left side of the fourth oil groove 9 is closed. The hydraulic oil enters the inner cavity of the boom small cavity 8 from the right fourth oil groove 9, and the hydraulic oil in the boom large cavity 6 flows into the inner cavity of the return oil tank 1;

[0028] Step 2: When the bucket is retracted, the bucket valve stem body 131 moves to the right, and the hydraulic oil flows from the second oil groove 5 to the interior of the bucket large cavity 4. At the same time, the first oil groove 3 is closed, and the hydraulic oil in the bucket small cavity 2 flows into the interior of the return oil groove 1. When the bucket is tilted, the bucket valve stem body 131 moves to the left, and the hydraulic oil flows from the first oil groove 3 to the bucket small cavity 2. The second oil groove 5 is then closed, and the hydraulic oil in the bucket large cavity 4 flows into the interior of the return oil groove 1.

[0029] Step 3: By setting the boom valve stem E1 step 145, three second pressure grooves 147 are added on the surface of the boom valve stem compared with the existing structure, and the surfaces of the boom valve stem D1 step 144 and the boom valve stem C1 step 143 are increased by one second pressure groove 147 compared with the existing structure, and at the same time, the surfaces of the boom valve stem A1 step 141 and the boom valve stem B1 step 142 are increased by two second pressure grooves 147 compared with the existing structure. By setting the boom valve stem A1 step 141, the boom valve stem B1 step 142, the boom valve stem C1 step 143, the boom valve stem D1 step 144, the boom valve stem E1 step 145 and the boom valve stem The rod body 146 can pre-store more tiny particles in the oil in the groove. When the boom valve stem body 146 changes direction, the high-speed liquid flow at the valve port will bring it into the oil return groove 1, and finally flow back to the oil tank for unified treatment. By setting the first pressure groove 136 and the second pressure groove 147, the boom valve stem body 146 and the bucket valve stem body 131 can be better maintained in the middle position, so it is not easy for the boom valve stem body 146 and the bucket valve stem body 131 to be stuck to one side, so that the boom valve stem body 146 and the bucket valve stem body 131 are always surrounded by oil to maintain a good lubrication state, which also has the effect of reducing internal leakage.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A multi-way reversing valve, characterized in that: The utility model comprises an oil return groove (1), a small rotating bucket cavity (2), a first oil groove (3), a large rotating bucket cavity (4), a second oil groove (5), a large boom cavity (6), a third oil groove (7), a small boom cavity (8), a fourth oil groove (9), a valve body (10), a one-way valve (11), a main safety valve (12), a rotating bucket valve stem assembly (13) and a boom valve stem assembly (14), wherein the oil return groove (1) is provided inside the valve body (10), a fourth oil groove (9) is provided inside the valve body (10) and outside the oil return groove (1), the one-way valve (11) is fixedly mounted on the top of the right side of the valve body (10), the main safety valve (12) is fixedly mounted on the top of the left side of the valve body (10), the rotating bucket valve stem assembly (13) is provided inside the valve body (10), and the boom valve stem assembly (14) is provided at the bottom of the valve body (10). The bucket valve stem assembly (13) includes a bucket valve stem body (131), a bucket valve stem D2 step (132), a bucket valve stem C2 step (133), a bucket valve stem B2 step (134), a bucket valve stem A2 step (135) and a first pressure groove (136); the boom valve stem assembly (14) includes a boom valve stem A1 step (141), a boom valve stem B1 step (142), a boom valve stem C1 step (143), a boom valve stem D1 step (144), a boom valve stem E1 step (145), a boom valve stem body (146) and a second pressure groove (147); a boom large cavity (6) is provided inside the valve body (10) and outside the boom valve stem A1 step (141); and a third oil groove (7) is provided inside the valve body (10) and outside the boom valve stem B1 step (142).

2. The multi-way directional valve according to claim 1, characterized in that: A small boom cavity (8) is provided inside the valve body (10) and outside the boom valve stem E1 step (145), and a large bucket cavity (4) is provided inside the valve body (10) and on the left side of the bucket valve stem B2 step (134).

3. The multi-way directional valve according to claim 1, characterized in that: A second oil groove (5) is provided inside the valve body (10) and outside the bucket valve stem B2 step (134). The first oil groove (3) is provided inside the valve body (10) and outside the bucket valve stem C2 step (133).

4. The multi-way directional valve according to claim 1, characterized in that: The small bucket cavity (2) is opened inside the valve body (10) and is located on the left side of the bucket valve stem D2 step (132), and the boom valve stem A1 step (141), boom valve stem B1 step (142), boom valve stem C1 step (143), boom valve stem D1 step (144) and boom valve stem E1 step (145) are all fixedly mounted on the surface of the boom valve stem body (146).

5. The multi-way directional valve according to claim 1, characterized in that: The bucket valve stem A2 step (135), the bucket valve stem B2 step (134), the bucket valve stem C2 step (133), and the bucket valve stem D2 step (132) are all fixedly mounted on the surface of the bucket valve stem body (131), and the surfaces of the boom valve stem A1 step (141) and the boom valve stem B1 step (142) are provided with a plurality of second pressure grooves (147).

6. The multi-way directional valve according to claim 1, characterized in that: The surfaces of the boom valve stem C1 step (143) and the boom valve stem D1 step (144) are provided with a plurality of second pressure grooves (147), and the surface of the boom valve stem E1 step (145) is provided with a plurality of second pressure grooves (147).

7. The multi-way directional valve according to claim 1, characterized in that: The surfaces of the bucket valve stem A2 step (135) and the bucket valve stem D2 step (132) are provided with a plurality of first pressure grooves (136), and the surfaces of the bucket valve stem B2 step (134) and the bucket valve stem C2 step (133) are provided with a plurality of first pressure grooves (136).

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