Multi-way reversing valve
By designing a multi-way reversing valve, the automatic position control of the valve core is achieved by using the role of elastic parts, the problem of manually adjusting the valve core position in the prior art is solved, and the effect of saving manpower and simple structure is achieved.
Patent Information
- Application Number
- CN202421969884.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-15
AI Technical Summary
In the use of loaders and other equipment, existing multi-way reversing valves need to manually adjust the relative position of the valve core and the valve body to achieve median pressure holding, two reversing working positions and floating side positions, which consumes manpower and has a complex structure.
A multi-way reversing valve is designed. By providing port A, port B, port P, first T and second T ports on the valve body, and a first end and second end are provided on the valve core. By using the role of the first elastic member and the second elastic member, the position control of the valve core is achieved by controlling the inlet and out of oil, including a middle position, a first reversing position, a second reversing position and a floating side position.
The automatic control of the valve core in four positions: the middle position, the first reversing position, the second reversing position and the floating side position is realized, saving manpower, simplifying the structure, and easy to make and use.
Smart Images
Figure CN222963388U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valve control, in particular to a multi-way directional control valve. Background Technique
[0002] The multi-way directional control valve is a combined valve with two or more directional control valves as the main body. The directional control valve is a type of valve that changes the on-off relationship of the oil passages connected to the valve body by means of the relative movement between the spool and the valve body. Compared with other types of valves, the multi-way directional control valve has the advantages of compact structure, small pressure loss, small sliding resistance of the spool, multiple-position function, long service life, and simple manufacturing.
[0003] For the operating conditions of equipment such as loaders, it is necessary to achieve four working positions: holding pressure in the neutral position, two reversing working positions, and a floating side position. Usually, holding pressure in the neutral position and two reversing working positions are achieved by manually adjusting the relative position between the spool and the valve body, which consumes manpower. And the floating side position usually requires an additional valve block to achieve, increasing the structural complexity and the manufacturing difficulty. Content of the Utility Model
[0004] The purpose of the utility model is to provide a multi-way directional control valve to solve the problems existing in the above-mentioned prior art, which can effectively save manpower, and has a simple structure and is easy to manufacture.
[0005] To achieve the above purpose, the utility model provides the following scheme:
[0006] The utility model provides a multi-way directional control valve, which comprises a valve body and a valve core. The valve body is provided with an A port, a B port, a P port, a first T port and a second T port. The A port is used for communicating with a first oil chamber of an oil cylinder, the B port is used for communicating with a second oil chamber of the oil cylinder, the first T port is communicated with the second T port, the valve core passes through the valve body, the middle part of the valve core is placed inside the valve body, and the first end and the second end of the valve core are both placed outside the valve core; a first end cover and a second end cover are fixedly arranged on the outer wall of the valve body, a first oil port is arranged on the first end cover, and a second oil port is arranged on the second end cover; a first elastic member is arranged between the first end of the valve core and the outer wall of the valve body, the first end of the valve core and the first elastic member are both placed inside the first end cover, and by feeding oil into the first end cover through the first oil port, the valve core can be moved towards the second end of the valve core to a first commutation position, the first end of the valve core can compress the first elastic member to shorten, the A port can be communicated with the second T port, and the B port can be communicated with the P port; a second elastic member is arranged between the second end of the valve core and the outer wall of the valve body, the second end of the valve core and the second elastic member are both placed inside the second end cover, and by feeding oil into the second end cover through the second oil port, the valve core can be moved towards the first end of the valve core to a second commutation position, the second end of the valve core can compress the second elastic member to shorten, the A port can be communicated with the P port, and the B port can be communicated with the first T port; by feeding oil into the second end cover through the second oil port, the valve core can be moved towards the first end of the valve core to a floating edge position, the second end of the valve core can compress the second elastic member to shorten, the first end of the valve core can compress the first elastic member to shorten, the A port can be communicated with the second T port, and the B port can be communicated with the first T port; when no oil is fed into the first end cover and no oil is fed into the second end cover, the valve core is placed in a neutral position, so that the A port, the B port, the P port and the first T port are disconnected from each other.
[0007] Preferably, it further includes a first connecting screw, a first spring seat, a second spring seat, a third spring seat, a fourth spring seat and a second connecting screw. Both the first elastic member and the second elastic member are springs. A through hole is formed in the middle of the first spring seat. The first spring seat, the first elastic member and the second spring seat are all sleeved on the first end of the valve core. The first elastic member is placed between the first spring seat and the second spring seat. The first connecting screw is threadedly connected to the first end of the valve core. The first connecting screw passes through the through hole. During the process that the valve core moves towards the first end of the valve core to the floating edge position, the first connecting screw and the first spring seat move relatively, and the first connecting screw can axially press the first spring seat, the first elastic member and the second spring seat onto the valve core. The fourth spring seat, the second elastic member and the third spring seat are all sleeved on the second end of the valve core. The second elastic member is placed between the fourth spring seat and the third spring seat. The second connecting screw is threadedly connected to the second end of the valve core. The second connecting screw can axially press the fourth spring seat, the second elastic member and the third spring seat onto the valve core.
[0008] Preferably, it further includes a first sealing ring and a second sealing ring. The first sealing ring is sleeved outside the valve core and is fixedly arranged between the outer wall of the first end cover and the valve body. The second sealing ring is sleeved outside the valve core and is fixedly arranged between the outer wall of the second end cover and the valve body.
[0009] Preferably, it further includes a first fastening screw and a second fastening screw. The first fastening screw fixedly connects the first end cover and the valve body. The second fastening screw fixedly connects the second end cover and the valve body.
[0010] Preferably, the first end cover and the second end cover have the same structure, the second spring seat, the third spring seat and the fourth spring seat have the same structure, the first connecting screw and the second connecting screw have the same structure, the first sealing ring and the second sealing ring have the same structure, and the first fastening screw and the second fastening screw have the same structure.
[0011] Preferably, a first avoidance groove is formed in the first end cover for avoiding the first connecting screw. A second avoidance groove is formed in the second end cover for avoiding the second connecting screw.
[0012] The utility model has achieved the following technical effects compared with the prior art:
[0013] When the multi-way directional control valve provided by the present utility model does not feed oil into the first end cover and does not feed oil into the second end cover, the spool is placed in the middle position under the action of the first elastic member and the second elastic member. By controlling whether to feed oil into the first end cover or the second end cover, the position control of the spool at the middle position, the first commutation position and the second commutation position is realized. By controlling the degree of oil feeding into the second end cover, the position control of the spool at the second commutation position and the floating edge position is realized. Therefore, the multi-way directional control valve provided by the present utility model can realize the control of the spool at four positions: the middle position, the first commutation position, the second commutation position and the floating edge position, meet the actual use requirements, effectively save manpower, and has a simple structure and is convenient for manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0015] Figure 1 Schematic diagram of the middle position of the spool of the multi-way directional control valve provided by the present utility model;
[0016] Figure 2 Schematic diagram of the first commutation position of the spool of the multi-way directional control valve provided by the present utility model;
[0017] Figure 3 Schematic diagram of the second commutation position of the spool of the multi-way directional control valve provided by the present utility model;
[0018] Figure 4 Schematic diagram of the floating edge position of the spool of the multi-way directional control valve provided by the present utility model;
[0019] Figure 5 Schematic diagram of the hydraulic principle of the multi-way directional control valve provided by the present utility model;
[0020] Figure 6 Schematic diagram of the pilot oil pressure curve during the process of the spool of the multi-way directional control valve provided by the present utility model moving from the middle position to the first commutation position;
[0021] Figure 7 Schematic diagram of the pilot oil pressure curve during the process of the spool of the multi-way directional control valve provided by the present utility model moving from the middle position to the second commutation position and then to the floating edge position;
[0022] In the figure: 1 - valve body, 2 - valve core, 3 - port A, 4 - port B, 5 - port P, 6 - first port T, 7 - second port T, 8 - first end cover, 9 - second end cover, 10 - first oil port, 11 - second oil port, 12 - first elastic member, 13 - second elastic member, 14 - first connecting screw, 15 - first spring seat, 16 - second spring seat, 17 - third spring seat, 18 - fourth spring seat, 19 - second connecting screw, 20 - first sealing ring, 21 - second sealing ring, 22 - first fastening screw, 23 - second fastening screw, 24 - first relief groove, 25 - second relief groove. Detailed implementation manner
[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0024] The purpose of the present invention is to provide a multi-way directional control valve to solve the problems existing in the above-mentioned prior art, which can effectively save manpower, and has a simple structure and is easy to manufacture.
[0025] In order to make the above-mentioned objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.
[0026] As Figures 1-7As shown in the figure, the present utility model provides a multi-way directional control valve, which includes a valve body 1 and a valve core 2. The valve body 1 is provided with an A port 3, a B port 4, a P port 5, a first T port 6 and a second T port 7. The A port 3 is used to communicate with the first oil chamber of the oil cylinder, the B port 4 is used to communicate with the second oil chamber of the oil cylinder, the first T port 6 is communicated with the second T port 7, the valve core 2 passes through the valve body 1, the middle part of the valve core 2 is placed inside the valve body 1, and the first end and the second end of the valve core 2 are both placed outside the valve core 2; a first end cover 8 and a second end cover 9 are fixedly arranged on the outer wall of the valve body 1, a first oil port 10 is opened on the first end cover 8, and a second oil port 11 is opened on the second end cover 9; a first elastic member 12 is arranged between the first end of the valve core 2 and the outer wall of the valve body 1, the first end of the valve core 2 and the first elastic member 12 are both placed inside the first end cover 8, and by feeding oil into the first end cover 8 through the first oil port 10, the valve core 2 can be moved towards the second end direction of the valve core 2 to the first commutation position, the first end of the valve core 2 compresses the first elastic member 12 to shorten, the A port 3 is communicated with the second T port 7, and the B port 4 is communicated with the P port 5; a second elastic member 13 is arranged between the second end of the valve core 2 and the outer wall of the valve body 1, the second end of the valve core 2 and the second elastic member 13 are both placed inside the second end cover 9, and by feeding oil into the second end cover 9 through the second oil port 11, the valve core 2 can be moved towards the first end direction of the valve core 2 to the second commutation position, the second end of the valve core 2 compresses the second elastic member 13 to shorten, the A port 3 is communicated with the P port 5, and the B port 4 is communicated with the first T port 6; by feeding oil into the second end cover 9 through the second oil port 11, the valve core 2 can be moved towards the first end direction of the valve core 2 to the floating edge position, the second end of the valve core 2 compresses the second elastic member 13 to shorten, the first end of the valve core 2 compresses the first elastic member 12 to shorten, the A port 3 is communicated with the second T port 7, and the B port 4 is communicated with the first T port 6, realizing the floating state of the oil cylinder; when no oil is fed into the first end cover 8 and no oil is fed into the second end cover 9, the valve core 2 is placed in the middle position, the A port 3, the B port 4, the P port 5 and the first T port 6 are disconnected from each other, and the oil cylinder is in a pressure-holding state.
[0027] For the multi-way directional control valve provided by the present utility model, when no oil is fed into the first end cover 8 and no oil is fed into the second end cover 9, the valve core 2 is placed in the middle position under the action of the first elastic member 12 and the second elastic member 13. By controlling whether to feed oil into the first end cover 8 or the second end cover 9, the position control of the valve core 2 in the middle position, the first commutation position and the second commutation position is realized. By controlling the degree of oil feeding into the second end cover 9, the position control of the valve core 2 in the second commutation position and the floating edge position is realized. Therefore, the multi-way directional control valve provided by the present utility model can realize the position control of the valve core 2 in four positions: the middle position, the first commutation position, the second commutation position and the floating edge position, meet the actual use requirements, can effectively save manpower, and has a simple structure and is convenient for manufacturing.
[0028] In the multi-way directional control valve provided by the present utility model: the P port 5 is a high-pressure oil port, the first T port 6 and the second T port 7 are low-pressure oil ports, the first T port 6 is communicated with the second T port 7. When there is no oil entering the first end cover 8 and no oil entering the second end cover 9, the spool 2 is placed in the middle position under the action of the first elastic member 12 and the second elastic member 13, so that the A port 3, the B port 4, the P port 5 and the first T port 6 are disconnected from each other, and the oil cylinder is in a pressure-holding state;
[0029] When switching from the middle position to the first commutation position, the pilot oil in the first end cover 8 only needs to overcome the elastic force of the first elastic member 12. According to the force balance formula: k*x = P*A, we get P = k*x / A, where k is the elastic coefficient of the first elastic member 12, x is the deformation of the first elastic member 12, A is the area of the first end face of the spool 2, and P is the pressure of the pilot oil in the first end cover 8;
[0030] When switching from the middle position to the second commutation position, the pilot oil in the second end cover 9 only needs to overcome the elastic force of the second elastic member 13. According to the force balance formula: k*x = P*A, we get P = k*x / A, where k is the elastic coefficient of the second elastic member 13, x is the deformation of the second elastic member 13, A is the area of the second end face of the spool 2, and P is the pressure of the pilot oil in the second end cover 9;
[0031] When switching from the second commutation position to the floating edge position, the pilot oil in the second end cover 9 needs to overcome the elastic forces of the second elastic member 13 and the first elastic member 12, which is equivalent to connecting the second elastic member 13 and the first elastic member 12 in parallel. On the premise that the elastic coefficients of the second elastic member 13 and the first elastic member 12 are the same, the total elastic force is increased to realize the grading of the pilot and obtain a better control effect. According to the force balance formula: k*x + kx1 = P*A, we get P = k*(x + x1) / A and P = (k*(x + x1) / x)*x / A, where k is the elastic coefficient, x is the deformation of the second elastic member 13, x1 is the deformation of the first elastic member 12, A is the area of the second end face of the spool 2, and P is the pressure of the pilot oil in the second end cover 9.
[0032] Furthermore, the multi-way directional control valve provided by the present utility model further includes a first connecting screw 14, a first spring seat 15, a second spring seat 16, a third spring seat 17, a fourth spring seat 18, and a second connecting screw 19. Both the first elastic member 12 and the second elastic member 13 are springs. A through hole is formed in the middle of the first spring seat 15. The first spring seat 15, the first elastic member 12, and the second spring seat 16 are all sleeved on the first end of the valve core 2. The first elastic member 12 is placed between the first spring seat 15 and the second spring seat 16. The first connecting screw 14 is threadedly connected to the first end of the valve core 2. The first connecting screw 14 passes through the through hole. During the process that the valve core 2 moves towards the first end of the valve core 2 to the floating edge position, the first connecting screw 14 and the first spring seat 15 move relative to each other. The first connecting screw 14 can axially press the first spring seat 15, the first elastic member 12, and the second spring seat 16 onto the valve core 2. The fourth spring seat 18, the second elastic member 13, and the third spring seat 17 are all sleeved on the second end of the valve core 2. The second elastic member 13 is placed between the fourth spring seat 18 and the third spring seat 17. The second connecting screw 19 is threadedly connected to the second end of the valve core 2. The second connecting screw 19 can axially press the fourth spring seat 18, the second elastic member 13, and the third spring seat 17 onto the valve core 2. The structure is simple, which is convenient for manufacturing and use.
[0033] Furthermore, the multi-way directional control valve provided by the present utility model further includes a first sealing ring 20 and a second sealing ring 21. The first sealing ring 20 is sleeved outside the valve core 2 and is fixedly arranged between the outer wall of the first end cover 8 and the valve body 1 to ensure that a sealed space is formed between the outer wall of the first end cover 8 and the valve body 1. The second sealing ring 21 is sleeved outside the valve core 2 and is fixedly arranged between the outer wall of the second end cover 9 and the valve body 1 to ensure that a sealed space is formed between the outer wall of the second end cover 9 and the valve body 1.
[0034] Furthermore, the multi-way directional control valve provided by the present utility model further includes a first fastening screw 22 and a second fastening screw 23. The first fastening screw 22 fixedly connects the first end cover 8 and the valve body 1; the second fastening screw 23 fixedly connects the second end cover 9 and the valve body 1. The structure is simple, which is convenient for manufacturing and use.
[0035] As a relatively preferred implementation manner of this embodiment, the first end cover 8 and the second end cover 9 have the same structure, the second spring seat 16, the third spring seat 17, and the fourth spring seat 18 have the same structure, the first connecting screw 14 and the second connecting screw 19 have the same structure, the first sealing ring 20 and the second sealing ring 21 have the same structure, and the first fastening screw 22 and the second fastening screw 23 have the same structure. The structure is simple, the replaceability is strong, which is convenient for manufacturing and use.
[0036] Further, a first avoidance groove 24 is formed in the first end cover 8, and the first avoidance groove 24 is used to avoid the first connecting screw 14; a second avoidance groove 25 is formed in the second end cover 9, and the second avoidance groove 25 is used to avoid the second connecting screw 19, with a compact structure and reduced space waste.
[0037] In the present utility model, specific examples are used to illustrate the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.
Claims
1. A multi-way reversing valve, characterized in that: The invention comprises a valve body and a valve core, wherein the valve body has an A port, a B port, a P port, a first T port and a second T port, wherein the A port is used to communicate with a first oil chamber of an oil cylinder, the B port is used to communicate with a second oil chamber of the oil cylinder, the first T port is communicated with the second T port, the valve core passes through the valve body, the middle part of the valve core is placed inside the valve body, and the first end of the valve core and the second end of the valve core are both placed outside the valve core; A first end cover and a second end cover are fixedly provided on the outer wall of the valve body, the first end cover is provided with a first oil port, and the second end cover is provided with a second oil port; A first elastic member is provided between the first end of the valve core and the outer wall of the valve body, and the first end of the valve core and the first elastic member are both placed in the first end cover. Oil is introduced into the first end cover through the first oil port, so that the valve core can be moved toward the second end of the valve core to a first switching position, so that the first end of the valve core presses the first elastic member to shorten, so that the A port is connected with the second T port, and the B port is connected with the P port; A second elastic member is provided between the second end of the valve core and the outer wall of the valve body, and the second end of the valve core and the second elastic member are both placed in the second end cover. Oil is introduced into the second end cover through the second oil port, so that the valve core can be moved toward the first end of the valve core to a second switching position, so that the second end of the valve core presses the second elastic member to shorten, so that the A port is connected with the P port, and the B port is connected with the first T port; By supplying oil into the second end cover through the second oil port, the valve core can be moved toward the first end of the valve core to a floating edge position, the second end of the valve core presses the second elastic member to shorten, the first end of the valve core presses the first elastic member to shorten, the A port is communicated with the second T port, and the B port is communicated with the first T port; When oil is not flowing into the first end cover and oil is not flowing into the second end cover, the valve core is placed in a neutral position, so that the A port, the B port, the P port and the first T port are disconnected from each other.
2. The multi-way reversing valve according to claim 1, characterized in that: The valve body also includes a first connecting screw, a first spring seat, a second spring seat, a third spring seat, a fourth spring seat and a second connecting screw. The first elastic member and the second elastic member are both springs. A through hole is provided in the middle of the first spring seat. The first spring seat, the first elastic member and the second spring seat are all sleeved on the first end of the valve core. The first elastic member is placed between the first spring seat and the second spring seat. The first connecting screw is threadedly connected to the first end of the valve core. The first connecting screw passes through the through hole. When the valve core moves toward the first end of the valve core to the floating edge position, the first connecting screw moves relative to the first spring seat. The first connecting screw can axially press the first spring seat, the first elastic member and the second spring seat onto the valve core. The fourth spring seat, the second elastic member and the third spring seat are all sleeved on the second end of the valve core. The second elastic member is placed between the fourth spring seat and the third spring seat. The second connecting screw is threadedly connected to the second end of the valve core. The second connecting screw can axially press the fourth spring seat, the second elastic member and the third spring seat onto the valve core.
3. The multi-way reversing valve according to claim 2, characterized in that: It also includes a first sealing ring and a second sealing ring, the first sealing ring is sleeved outside the valve core, and the first sealing ring is fixed between the first end cover and the outer wall of the valve body; the second sealing ring is sleeved outside the valve core, and the second sealing ring is fixed between the second end cover and the outer wall of the valve body.
4. The multi-way reversing valve according to claim 3, characterized in that: It also includes a first fastening screw and a second fastening screw, wherein the first fastening screw fixes the first end cover to the valve body; and the second fastening screw fixes the second end cover to the valve body.
5. The multi-way reversing valve according to claim 4, characterized in that: The first end cover has the same structure as the second end cover, the second spring seat, the third spring seat and the fourth spring seat have the same structure, the first connecting screw has the same structure as the second connecting screw, the first sealing ring has the same structure as the second sealing ring sleeve, and the first fastening screw has the same structure as the second fastening screw.
6. The multi-way reversing valve according to claim 2, characterized in that: A first avoidance groove is provided in the first end cover, and the first avoidance groove is used to avoid the first connecting screw; a second avoidance groove is provided in the second end cover, and the second avoidance groove is used to avoid the second connecting screw.