Two-position three-way valve

Abstract

The utility model provides a two-position three-way valve, and belongs to the technical field of valves. A two-position three-way valve comprises a valve sleeve, a valve element, a reset elastic piece and an electromagnetic valve. When the coil is kept electrified, the power output end of the driving assembly extrudes the valve element downwards under the electromagnetic action, meanwhile, the reset elastic piece is converted into a compressed state from an initial state, and the state that the port A is communicated with the port P is achieved through the acting force applied by the power output end of the driving assembly. When the coil is maintained to be powered off, due to the fact that the gravity of the valve element is smaller than the elastic force of the reset elastic piece, the state that the port A is communicated with the port T can be achieved under the action of the reset elastic piece, due to the fact that the valve sleeve is provided with the multiple ports P, the multiple ports A and the multiple ports T, when the flow resistance of liquid in an oil way is increased, the liquid can flow out through the multiple ports P or the multiple ports T, and therefore the oil way can flow out. And the liquid can flow in through a plurality of ports A, so that the rapid circulation of the liquid in the oil path is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a two-position three-way valve. Background Art

[0002] The prior art discloses a pilot-operated two-position three-way valve. In the actual application process, when the viscosity or flow rate of the liquid in the oil circuit of the two-position three-way valve becomes larger due to various reasons, a large flow resistance will be generated, increasing the power consumption of the entire system. Long-term use will cause damage to the components in the system. Summary of the Utility Model

[0003] An embodiment of the utility model provides a two-position three-way valve, aiming to solve the technical problem that when the viscosity or flow rate of the liquid in the oil circuit in the prior art becomes larger, a large flow resistance is generated, increasing the power consumption of the system.

[0004] To achieve the above object, the technical solution adopted by the utility model is: to provide a two-position three-way valve, which includes a valve sleeve, a valve core, a reset elastic member, and an electromagnetic valve. The valve sleeve is provided with a plurality of P ports, a plurality of A ports, and a plurality of T ports that are communicated with the inner cavity of the valve sleeve and are arranged at intervals along the axis; the valve core is slidably arranged inside the valve sleeve, and the valve core is provided with a first hollow groove, a second hollow groove, and a third hollow groove that are respectively adapted to the P port, the A port, and the T port in sequence; the reset elastic member is arranged inside the valve core, the bottom of the reset elastic member abuts against the valve sleeve, and the top of the reset elastic member abuts against the valve core; the electromagnetic valve is arranged on the upper part of the valve sleeve, the electromagnetic valve includes a housing and a driving component, the housing is connected to the top of the valve sleeve, the driving component is arranged inside the housing, and the driving component has a degree of freedom to slide up and down along the housing.

[0005] In a possible implementation manner, the driving component includes a coil, a guide sleeve, and a moving iron core. The coil is fixedly arranged inside the housing; the guide sleeve is arranged inside the coil, and the central axis of the guide sleeve coincides with the central axis of the coil; the moving iron core is slidably arranged inside the guide sleeve.

[0006] In a possible implementation manner, a push rod is further arranged on the moving iron core, and one end of the push rod is fixedly connected to the moving iron core.

[0007] In a possible implementation manner, a wear-resistant sleeve is arranged between the guide sleeve and the moving iron core, and the central axis of the wear-resistant sleeve is collinear with the central axis of the guide sleeve.

[0008] In a possible implementation manner, a fixed iron core is arranged at the top of the valve core, the fixed iron core is coaxially arranged with the valve core, the fixed iron core is fixedly connected to the valve sleeve, and the fixed iron core is provided with a vertical sliding insertion hole.

[0009] In a possible implementation, a protrusion is provided on the top of the valve core.

[0010] In a possible implementation, the fixed iron core includes a first fixing portion, a second fixing portion, and a conical portion. The first fixing portion is fixedly connected to the inner side wall of the upper part of the valve sleeve, and a receiving hole for receiving the protrusion is provided in the first fixing portion; the second fixing portion is fixedly provided on the first fixing portion, the outer side wall of the second fixing portion is fixedly connected to the guide sleeve, a sliding jack is provided on the second fixing portion, and the top surface of the second fixing portion is used to support the bottom surface of the moving iron core; the conical portion is fixedly provided on the second fixing portion;

[0011] Wherein, the conical portion is used to perform circumferential limit on the moving iron core.

[0012] In a possible implementation, an installation plate is provided between the valve sleeve and the housing, and a first through hole and two second through holes are provided on the installation plate. The first through hole is sleeved on the fixed iron core, and the two second through holes are symmetrically provided on both sides of the housing.

[0013] In a possible implementation, an upper ring plate and a lower ring plate of the guide sleeve, and the upper ring plate and the lower ring plate enclose a receiving cavity for receiving the coil.

[0014] In a possible implementation, the guide sleeve is made of a non-magnetic material.

[0015] In the embodiment of the present application, compared with the prior art, a two-position three-way valve includes a valve sleeve, a valve core, a reset elastic member, and an electromagnetic valve. When the coil remains energized, under the electromagnetic action, the power output end of the driving assembly presses the valve core downward, and at the same time, the reset elastic member changes from the initial state to the compressed state, and the acting force applied by the power output end of the driving assembly realizes the state where port A communicates with port P; when the coil remains de-energized, since the self-gravity of the valve core is less than the elastic force of the reset elastic member, therefore, under the action of the reset elastic member, the state where port A communicates with port T can be realized. Since the valve sleeve is provided with a plurality of port P, a plurality of port A, and a plurality of port T, when the flow resistance of the liquid in the oil circuit increases, the liquid can not only flow out through a plurality of port P or a plurality of port T, but also flow in through a plurality of port A, solving the technical problem that when the viscosity or flow rate of the liquid in the oil circuit in the prior art becomes larger, a large flow resistance is generated, resulting in an increase in system power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structure diagram of a two-position three-way valve provided by an embodiment of the present invention;

[0017] Figure 2 is a cross-sectional view (power-off state) of a two-position three-way valve provided by an embodiment of the present invention;

[0018] Figure 3 A cross-sectional view (energized state) of a two-position three-way valve provided by an embodiment of the present utility model;

[0019] Figure 4 The front view of the valve sleeve provided by an embodiment of the present utility model;

[0020] Figure 5 The front view of the valve core provided by an embodiment of the present utility model;

[0021] Figure 6 The axonometric view of the fixed iron core provided by an embodiment of the present utility model;

[0022] Figure 7 The axonometric view of the mounting plate provided by an embodiment of the present utility model;

[0023] Explanation of reference numerals:

[0024] 1. Valve sleeve;

[0025] 2. Valve core; 21. First hollow groove; 22. Second hollow groove; 23. Third hollow groove; 24. Protrusion;

[0026] 3. Reset elastic member;

[0027] 4. Solenoid valve; 41. Outer shell; 42. Driving assembly; 421. Coil; 422. Guide sleeve; 423. Moving iron core; 424. Push rod; 425. Wear-resistant sleeve;

[0028] 5. Fixed iron core; 51. Sliding jack; 52. First fixing part; 53. Second fixing part; 54. Conical part; 521. Accommodating hole;

[0029] 6. Mounting plate, 61. First through hole; 62. Second through hole;

[0030] 71. First sealing ring; 72. Second sealing ring; 73. Third sealing ring. Detailed implementation manners

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be further noted that the drawings and embodiments of the present invention mainly describe and illustrate the concept of the present invention. Based on this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems, control systems, etc. may not be completely described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above specific forms and settings in a well-known manner.

[0033] When an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] The orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0035] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, and the meaning of "several" is one or more, unless otherwise specifically defined.

[0036] Please refer to Figures 1 to 3 together, and a two-way three-way valve provided by the present utility model will be described hereinafter.

[0037] A two-position three-way valve includes a valve sleeve 1, a valve core 2, a reset elastic member 3, and a solenoid valve 4. The valve sleeve 1 is provided with a plurality of P ports, a plurality of A ports, and a plurality of T ports that communicate with the inner cavity of the valve sleeve 1 and are arranged at intervals along the axial direction; the valve core 2 is slidably arranged inside the valve sleeve 1, and the valve core 2 is provided with a first hollow groove 21, a second hollow groove 22, and a third hollow groove 23 that are respectively adapted to the P port, the A port, and the T port in sequence; the reset elastic member 3 is arranged inside the valve core 2, the bottom of the reset elastic member 3 abuts against the valve sleeve 1, and the top of the reset elastic member 3 abuts against the valve core 2; the solenoid valve 4 is arranged on the upper part of the valve sleeve 1, the solenoid valve 4 includes a housing 41 and a driving assembly 42, the housing 41 is connected to the top of the valve sleeve 1, the driving assembly 42 is arranged inside the housing 41, and the driving assembly 42 has a degree of freedom to slide up and down along the housing 41. Among them, the P port is used to connect high-pressure fluid, the T port is used to connect low-pressure fluid, and the A port is used to connect the pressure control chamber.

[0038] Specifically, the reset elastic member 3 is a spring.

[0039] In the embodiment of the present application, compared with the prior art, when the coil 421 remains energized, under the electromagnetic action, the power output end of the driving assembly 42 presses the valve core 2 downward, and at the same time, the reset elastic member 3 changes from the initial state to the compressed state, and the acting force applied by the power output end of the driving assembly 42 realizes the state where the A port communicates with the P port; when the coil 421 remains de-energized, since the self-gravity of the valve core 2 is less than the elastic force of the reset elastic member 3, therefore, under the action of the reset elastic member 3, the state where the A port communicates with the T port can be realized. Since the valve sleeve is provided with a plurality of P ports, a plurality of A ports, and a plurality of T ports, when the fluid flow resistance in the oil circuit increases, the liquid can flow out through a plurality of P ports or a plurality of T ports, and can also flow in through a plurality of A ports, solving the technical problem that when the viscosity or flow rate of the liquid in the oil circuit in the prior art increases, a large flow resistance is generated, resulting in an increase in system power consumption.

[0040] Specifically, the plurality of P ports, the plurality of A ports, and the plurality of T ports are all arranged at intervals along the circumferential direction of the central axis of the valve sleeve.

[0041] Such as Figures 1 to 5 , the P port is provided with two layers along the axial direction of the valve sleeve, and the T port is provided with two layers along the axial direction of the valve sleeve; the two-layer setting of the P port and the T port can increase the passing rate of the liquid, and further reduce the technical problem that when the viscosity of the liquid increases or the flow rate becomes larger, a large flow resistance is generated, resulting in an increase in system power consumption.

[0042] Furthermore, the P port can be provided with multiple layers; the T port can also be provided with multiple layers.

[0043] Specifically, please refer to Figure 2 And Figure 3, the driving component 42 includes a coil 421, a guide sleeve 422, and a moving iron core 423. The coil 421 is fixedly arranged in the housing 41; the guide sleeve 422 is arranged inside the coil 421, and the central axis of the guide sleeve 422 coincides with the central axis of the coil 421; the moving iron core 423 is slidably arranged inside the guide sleeve 422.

[0044] When the coil 421 is energized, the coil 421 generates a magnetic field; since the moving iron core 423 is slidably arranged inside the guide sleeve 422, under the electromagnetic action, the moving iron core 423 presses down the valve core 2, thereby compressing the reset elastic member 3, and the reset elastic member 3 changes from the initial state to the compressed state, thereby driving the valve core 2 to be misaligned with the valve sleeve 1, realizing the state where port A communicates with port P; when the coil 421 is de-energized, the coil 421 cannot generate a magnetic field, and the reset elastic member 3 changes from the compressed state to the initial state, thereby driving the valve core 2 to move. At the same time, the moving iron core 423 is slidably arranged inside the guide sleeve 422, so under the elastic force, it drives the valve core 2 and the moving iron core 423 to reset, realizing the state where port A communicates with port T.

[0045] In other embodiments, the driving component 42 can also adopt an electric push rod.

[0046] Further, please refer to Figure 2 and Figure 3 , a push rod 424 is further arranged on the moving iron core 423. One end of the push rod 424 is fixedly connected to the moving iron core 423, which not only reduces the self-weight of the moving iron core 423, reduces the requirements for the spring, but also reduces the requirements for the magnetic field magnitude during the electromagnetic action process, and further reduces the requirements for the winding of the coil 421.

[0047] Since the two-way three-way valve needs to be energized and de-energized frequently during actual use, in order to extend the service life of the moving iron core 423, a wear-resistant sleeve 425 is arranged between the guide sleeve 422 and the moving iron core 423.

[0048] In order to ensure the coaxiality during the up and down sliding process of the push rod 424, the central axis of the wear-resistant sleeve 425 is collinear with the central axis of the guide sleeve 422.

[0049] On the basis of the above embodiments, in order to prevent the push rod 424 from shifting during the sliding process and further limit the movement range of the valve core 2, a fixed iron core 5 is arranged on the top of the valve core 2. The fixed iron core 5 is coaxially arranged with the valve core 2, the fixed iron core 5 is fixedly connected to the valve sleeve 1, and the fixed iron core 5 is provided with a vertical sliding insertion hole 51; the sliding insertion hole 51 is used to accommodate the push rod 424, and at the same time, the bottom of the fixed iron core 5 is used to limit the valve core 2.

[0050] In order to reduce the distance between the push rod 424 and the valve core 2, a convex portion 24 is arranged on the top of the valve core 2, and the bottom of the push rod 424 is in contact connection with the top end of the convex portion 24.

[0051] Please refer to Figure 6 , further, the fixed iron core 5 includes a first fixing portion 52, a second fixing portion 53 and a conical portion 54. The first fixing portion 52 is fixedly connected to the inner side wall of the upper part of the valve sleeve 1, and the first fixing portion 52 is provided with a receiving hole 521 for receiving the protruding portion 24; the second fixing portion 53 is fixed on the first fixing portion 52, and the outer side wall of the second fixing portion 53 is fixedly connected to the guide sleeve 422, and a sliding jack 51 is provided on the second fixing portion 53, and the top surface of the second fixing portion 53 is used to support the bottom surface of the moving iron core 423; the conical portion 54 is fixed on the second fixing portion 53;

[0052] Among them, the conical portion 54 is used for circumferentially limiting the moving iron core 423.

[0053] In this embodiment, the protruding portion 24 slidably penetrates through the receiving hole 521, and the push rod 424 slidably penetrates through the sliding jack 51. At the same time, the top surface of the second fixing portion 53 is used to support the bottom surface of the moving iron core 423.

[0054] When the coil 421 is energized, the coil 421 generates a magnetic field; since the moving iron core 423 is slidably arranged in the guide sleeve 422, under the electromagnetic action, the bottom of the push rod 424 presses down on the protruding portion 24 of the valve core 2, thereby squeezing the return elastic member 3, and the return elastic member 3 changes from the initial state to the compressed state, thereby driving the valve core 2 to be misaligned with the valve sleeve 1. Since the top surface of the second fixing portion 53 is used to support the bottom surface of the moving iron core 423, when the bottom surface of the moving iron core 423 contacts the top surface of the second fixing portion 53, the movement stroke of the push rod 424 is limited, and finally the state of port A communicating with port P is realized; when the coil 421 is de-energized, the coil 421 cannot generate a magnetic field, and the return elastic member 3 changes from the compressed state to the initial state, thereby driving the valve core 2 to move upward. Since the receiving hole 521 of the first fixing portion 52 is used to receive the protruding portion 24, the first fixing portion 52 limits the movement stroke of the valve core 2, and finally under the elastic force of the return elastic member 3, the state of port A communicating with port T is realized.

[0055] Specifically, the outer diameter of the first fixing portion 52 is larger than the outer diameter of the second fixing portion 53.

[0056] Further, a first sealing ring 71 is provided between the first fixing portion 52 and the inner side wall of the valve sleeve 1; a second sealing ring 72 is provided between the second fixing portion 53 and the guide sleeve 422, ensuring the sealing performance of the connection between the fixed iron core 5 and the valve sleeve 1 and the guide sleeve 422.

[0057] Please refer to Figure 1 and Figure 7, in other embodiments, an installation plate 6 is provided between the valve sleeve 1 and the outer shell 41. The installation plate 6 is provided with a first through hole 61 and two second through holes 62. The first through hole 61 is sleeved on the fixed iron core 5, and the two second through holes 62 are symmetrically arranged on both sides of the outer shell 41. The installation plate 6 is provided to better install and fix the two-way three-way valve with external components.

[0058] In other embodiments, for the upper ring plate and the lower ring plate of the guide sleeve 422, the upper ring plate and the lower ring plate enclose a receiving cavity for receiving the coil 421, thereby tightly connecting the coil 421 and the guide sleeve 422 together.

[0059] Specifically, the guide sleeve 422 is made of a non-magnetic material.

[0060] Please refer to Figure 2 and Figure 3 , a third sealing ring 73 is further provided on the upper outer peripheral side of the valve sleeve 1 to ensure the sealing performance when the valve sleeve 1 is installed with external components.

[0061] On the basis of the above embodiments, in order to ensure that the liquid cannot flow out from the T port, the radial clearance between the valve core 2 and the valve sleeve 1 in this application is extremely small.

[0062] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A two-position three-way valve, characterized in that: include: A valve sleeve (1) is provided with a plurality of P ports, a plurality of A ports and a plurality of T ports which are communicated with the inner cavity of the valve sleeve (1) and are arranged at intervals along the axial direction; A valve core (2) is slidably arranged inside the valve sleeve (1), and the valve core (2) is provided with a first hollow groove (21), a second hollow groove (22) and a third hollow groove (23) which are respectively matched with the P port, the A port and the T port in sequence; A reset elastic member (3) is arranged inside the valve core (2), the bottom of the reset elastic member (3) abuts against the valve sleeve (1), and the top of the reset elastic member (3) abuts against the valve core (2); The solenoid valve (4) is arranged on the upper part of the valve sleeve (1), and the solenoid valve (4) comprises a shell (41) and a drive assembly (42). The shell (41) is connected to the top of the valve sleeve (1), and the drive assembly (42) is arranged in the shell (41). The drive assembly (42) has the freedom to slide up and down along the shell (41).

2. A two-position three-way valve according to claim 1, characterized in that: The drive assembly (42) comprises: A coil (421) is fixedly mounted in the housing (41); A guide sleeve (422) is disposed in the coil (421), and the central axis of the guide sleeve (422) coincides with the central axis of the coil (421); The moving iron core (423) is slidably disposed in the guide sleeve (422).

3. A two-position three-way valve as claimed in claim 2, characterized in that: The moving iron core (423) is also provided with a push rod (424), and one end of the push rod (424) is fixedly connected to the moving iron core (423).

4. A two-position three-way valve as claimed in claim 3, characterized in that: A wear-resistant sleeve (425) is provided between the guide sleeve (422) and the moving iron core (423), and the central axis of the wear-resistant sleeve (425) is arranged colinearly with the central axis of the guide sleeve (422).

5. A two-position three-way valve as claimed in claim 4, characterized in that: A fixed iron core (5) is provided on the top of the valve core (2), the fixed iron core (5) is coaxially arranged with the valve core (2), the fixed iron core (5) is fixedly connected to the valve sleeve (1), and the fixed iron core (5) is provided with a vertical sliding insertion hole (51).

6. A two-position three-way valve as claimed in claim 5, characterized in that: A protrusion (24) is provided on the top of the valve core (2).

7. A two-position three-way valve as claimed in claim 6, characterized in that: The fixed iron core (5) comprises: A first fixing portion (52) fixedly connected to the inner side wall of the upper portion of the valve sleeve (1), wherein the first fixing portion (52) is provided with a receiving hole (521) for receiving the protruding portion (24); A second fixing portion (53) is fixedly mounted on the first fixing portion (52); an outer wall of the second fixing portion (53) is fixedly connected to the guide sleeve (422); a sliding insertion hole (51) is provided on the second fixing portion (53); and a top surface of the second fixing portion (53) is used to support a bottom surface of the moving iron core (423); A conical portion (54) fixedly mounted on the second fixing portion (53); Wherein, the conical portion (54) is used to perform circumferential positioning of the moving iron core (423).

8. A two-position three-way valve as claimed in claim 7, characterized in that: A mounting plate (6) is provided between the valve sleeve (1) and the outer shell (41), and a first through hole (61) and two second through holes (62) are provided on the mounting plate (6), wherein the first through hole (61) is sleeved on the fixed iron core (5), and the two second through holes (62) are symmetrically arranged on both sides of the outer shell (41).

9. A two-position three-way valve as claimed in claim 8, characterized in that: The upper ring plate and the lower ring plate of the guide sleeve (422) are arranged to form a receiving cavity for receiving the coil (421).

10. A two-position three-way valve as claimed in claim 2, characterized in that: The guide sleeve (422) is made of non-magnetic material.

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