Reversing valve

Abstract

The reversing valve comprises a valve body and an electromagnet fixed at one end of the valve body, the electromagnet comprises a guide sleeve, a coil wound on the outer wall of the guide sleeve and a movable iron core arranged in the guide sleeve in a sliding mode, and a plurality of balls are evenly distributed on the outer wall of the movable iron core with a circle point as the axis at equal intervals. An oil cavity is formed in the movable iron core, and a plurality of oil outlet holes are evenly distributed in the position, close to the bottom, of the side wall of the oil cavity with a circle point as the axis. When the coil loses power, the resistance and abrasion of the movable iron core during movement are reduced through the balls, when the coil loses power, braking impact of the movable iron core is reduced through the blocking and buffering assembly, the piston is pushed to extrude lubricating oil in the oil cavity to flow out of the oil outlet, the lubricating oil lubricates the balls and the outer wall of the guide sleeve, and abrasion of the balls and the guide sleeve is further reduced. And the product has the advantages of reduced abrasion, long service life and buffering effect.

Description

Technical Field

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

[0002] A reversing valve is a directional control valve with two or more channels and two or more flow patterns. It relies on the relative movement of the valve core and valve body to open and close the channels, thereby switching the flow direction of the medium. Due to the advantages of existing reversing valve hydraulic actuators, such as small size, light weight, compact structure, stable operation, and easy implementation of rapid starting, braking, and frequent reversing, it is widely used in various fields such as machinery manufacturing, engineering construction, petrochemical industry, transportation, military equipment, mining and metallurgy, light industry, agricultural machinery, fishery, and forestry.

[0003] After long-term and frequent reciprocating processes, the moving iron core of the existing electromagnetic reversing valve is severely worn, affecting the normal operation of the electromagnetic valve. Therefore, the applicant has made a useful design and found a solution to the above problem. The technical solution to be introduced below was produced in this context. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned traditional electromagnetic reversing valve design and provide a product with reduced wear, long service life and buffering effect.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions.

[0006] A reversing valve comprises a valve body and an electromagnet fixed to one end of the valve body, the electromagnet comprising a guide sleeve, a coil wound on the outer wall of the guide sleeve, and a moving iron core slidably arranged in the guide sleeve, the outer wall of the moving iron core is provided with a number of equally spaced balls with a dot as the axis, and abuts the inner wall of the guide sleeve, an oil chamber is provided in the moving iron core, a number of oil outlet holes are evenly distributed on the side wall of the oil chamber near the bottom with a dot as the axis, a piston that can move up and down is provided at the entrance of the oil chamber, the electromagnet is also provided with a damping component, and abuts the piston, which is used to promote the movement of the piston and provide a buffering effect for the moving iron core.

[0007] Preferably, at least two outlet ends are provided on one side of the valve body, and at least one inlet end is provided on the other side of the valve body, and an undercut groove is provided between the inlet end and the two outlet ends.

[0008] Preferably, a channel is provided in the valve body and is connected to the outlet end and the inlet end. The channel is provided with a valve core that can move left and right. The outer wall of the valve core is provided with an O-ring, and the valve core abuts the inner wall of one of the undercut grooves.

[0009] Preferably, a stopper is provided at the other end of the valve body, a return spring is provided in the stopper and abuts against the valve core.

[0010] Preferably, a first retaining ring is provided at the outlet of the guide sleeve.

[0011] Preferably, the outer wall of the moving iron core is provided with a first stop portion, and is slidably arranged in the guide sleeve, and the first stop portion is provided with a plurality of insertion holes.

[0012] Preferably, the moving iron core sleeve is provided with a locking sleeve, the locking sleeve is provided with an insert block corresponding to the socket, inclined blocks are provided on both sides of the insert block, and abut against the two side walls of the socket, a sliding groove for accommodating the ball is provided between the locking sleeve and the first stop portion, and an outer wall of the locking sleeve is provided with an oil groove corresponding to the oil outlet hole, and the oil groove is provided with an inclined surface and faces the ball.

[0013] Preferably, the damping assembly includes a support knob and a push rod, a blind hole is provided in the support knob, a second retaining ring is provided in the blind hole, the push rod is provided with a second retaining portion and is slidably arranged in the blind hole, a buffer spring is provided in the blind hole and abuts against the second retaining portion.

[0014] Beneficial effects:

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model reduces the resistance and wear of the moving iron core during its movement through the ball, so that the valve core moves smoothly and sensitively. When the coil loses power supply, the reset spring releases the elastic force to reset the valve core and the moving iron core. The damping component reduces the movement speed of the moving iron core, thereby reducing its braking impact force. At the same time, the damping component also promotes the movement of the piston, thereby squeezing the lubricating oil in the oil chamber to flow out from the oil outlet, lubricating the ball and the outer wall of the guide sleeve, further reducing the wear of the ball and the guide sleeve, and extending the service life of the electromagnetic reversing valve, so that the product has the advantages of reduced wear, long service life, and buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the side cross-sectional structure of a reversing valve of the present utility model;

[0018] Figure 2 For this utility model Figure 1 A partial enlarged view of a reversing valve;

[0019] Figure 3 This is an exploded view of a reversing valve of the utility model;

[0020] Figure 4 This is a structural diagram of a locking sleeve of a reversing valve of the utility model

[0021] The corresponding relationship between the illustration labels and component names in the figure is as follows:

[0022] Reference numerals: 1, valve body; 2, electromagnet; 3, damping assembly; 4, valve core; 5, stopper;

[0023] 11. Outlet end; 12. Inlet end; 13. Undercut groove; 14. Passage;

[0024] 21. Guide sleeve; 22. Coil; 23. Moving iron core; 24. Ball bearing; 25. Locking sleeve; 26. Slideway;

[0025] 211, first retaining ring;

[0026] 231, oil chamber; 232, oil outlet hole; 233, piston; 234, first stopper; 235, socket;

[0027] 251, plug block; 252, inclined block; 253, oil tank; 254, inclined surface;

[0028] 31. Support knob; 32. Push rod; 33. Blind hole; 34. Buffer spring;

[0029] 321, second gear;

[0030] 331, second retaining ring;

[0031] 41. O-ring;

[0032] 51. Return spring. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0036] Reference example Figures 1 to 4 A reversing valve comprises a valve body 1 and an electromagnet 2 fixed to one end of the valve body 1, the electromagnet 2 comprises a guide sleeve 21, a coil 22 wound around the outer wall of the guide sleeve 21, and a moving iron core 23 slidably arranged in the guide sleeve 21, the outer wall of the moving iron core 23 is evenly distributed with a number of equally spaced balls 24 with a dot as the axis, and abuts against the inner wall of the guide sleeve 21, an oil chamber 231 is provided in the moving iron core 23, a number of oil outlet holes 232 are evenly distributed near the bottom of the side wall of the oil chamber 231 with a dot as the axis, a piston 233 that can move up and down is provided at the entrance of the oil chamber 231, the electromagnet 2 is also provided with a damping component 3, and abuts against the piston 233, for pushing the piston 233 to move and providing a buffering effect for the moving iron core 23;

[0037] It is worth mentioning that one side of the valve body 1 is provided with at least two outlet ends 11, and the other side of the valve body 1 is provided with at least one inlet end 12. A subcut groove 13 is provided between the inlet end 12 and the two outlet ends 11. The inlet end 12 is connected to the delivery pipe, and the outlet end 11 is connected to the output pipe. The subcut groove 13 is used in conjunction with the valve core 4.

[0038] It is worth mentioning that a channel 14 is provided in the valve body 1 and is connected to the outlet end 11 and the inlet end 12. The channel 14 is provided with a valve core 4 that can move left and right. The outer wall of the valve core 4 is provided with an O-ring 41. The valve core 4 abuts the inner wall of one of the undercut grooves 13. The channel 14 provides a guide for the valve core 4. When the valve core 4 abuts one of the undercut grooves 13, the connection between the inlet and the other outlet is blocked, and the liquid medium or the gaseous medium flows to the outlet connected to the inlet. When the valve core 4 moves, the liquid medium or the gaseous medium flows to the other outlet. The O-ring 41 prevents the medium from leaking to the other outlet.

[0039] It is worth mentioning that a stopper 5 is provided at the other end of the valve body 1. A return spring 51 is provided inside the stopper 5 and abuts against the valve core 4. The return spring 51 resets the valve core 4 and the movable iron core 23.

[0040] It is worth mentioning that a first retaining ring 211 is provided at the outlet of the guide sleeve 21. The first retaining ring 211 limits the extension distance of the movable iron core 23 and also provides a guide for the movable iron core 23.

[0041] It is worth mentioning that the outer wall of the moving iron core 23 is provided with a first stopper 234, which is slidably disposed in the guide sleeve 21. The first stopper 234 is provided with a plurality of insertion holes 235. The first stopper 234 is used in conjunction with the first stop ring 211, and the insertion holes 235 are used in conjunction with the insertion block 251.

[0042] It is worth mentioning that the movable iron core 23 is provided with a locking sleeve 25. The locking sleeve 25 has an insert block 251 corresponding to the insertion hole 235. The insert block 251 has inclined blocks 252 on both sides, which abut the side walls of the insertion hole 235. A chute 26 for accommodating the ball 24 is provided between the locking sleeve 25 and the first stop portion 234. The outer wall of the locking sleeve is provided with an oil groove 253 corresponding to the oil outlet hole 232. The oil groove 253 has an inclined surface 254 and faces the ball 24. The locking sleeve 25 prevents the ball 24 from separating from the movable iron core 23. The chute 26 allows the ball 24 to move. The inclined blocks 252 connect and fix the insert block 251 to the first stop portion 234 by interference fit. The inclined surface 254 guides the lubricating oil to flow quickly to the ball 24.

[0043] It is worth mentioning that the damping assembly 3 includes a support knob 31 and a push rod 32. A blind hole 33 is provided in the support knob 31. The blind hole 33 is provided with a second retaining ring 331. The push rod 32 is provided with a second retaining portion 321 and is slidably arranged in the blind hole 33. A buffer spring 34 is provided in the blind hole 33 and abuts against the second retaining portion 321. The second retaining ring 331 not only limits the extension distance of the push rod 32, but also provides a guiding function for the push rod 32. The buffer spring 34 absorbs the impact energy of the moving iron core 23.

[0044] The operating principle of the present invention is now described as follows:

[0045] When the coil 22 loses power, the movable iron core 23 loses its holding force, and the return spring 51 releases its elastic force to push the valve core 4 and the movable iron core 23 back to their original position. The piston 233 quickly abuts against the push rod 32 and pushes the push rod 32 inward, compressing the buffer spring 34 to store energy, thereby gradually reducing the moving speed of the movable iron core 23 until the movable iron core 23 abuts against the support knob 31 and returns to its original position.

[0046] When the piston 233 quickly impacts the push rod 32, the impact force causes the piston 233 to move into the oil chamber 231, thereby squeezing the lubricating oil in the oil chamber 231 to flow out from the oil outlet 232 and be guided to the ball 24 through the inclined surface 254, further reducing the wear of the ball 24 and the guide sleeve 21, and extending the service life of the electromagnetic reversing valve.

[0047] The above design scheme can enable the product to achieve the advantages of reduced wear, long service life and buffering effect.

[0048] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A reversing valve comprising a valve body (1) and an electromagnet (2) fixed to one end of the valve body (1), characterized in that: The electromagnet (2) comprises a guide sleeve (21), a coil (22) wound on the outer wall of the guide sleeve (21), and a moving iron core (23) slidably arranged in the guide sleeve (21); the outer wall of the moving iron core (23) is evenly distributed with a plurality of equally spaced balls (24) with a dot as the axis, and abuts against the inner wall of the guide sleeve (21); an oil chamber (231) is provided in the moving iron core (23); a side wall of the oil chamber (231) is evenly distributed with a plurality of oil outlet holes (232) near the bottom with a dot as the axis; a piston (233) that can move up and down is provided at the entrance of the oil chamber (231); the electromagnet (2) is also provided with a damping component (3) abutting against the piston (233) for pushing the piston (233) to move and providing a buffering effect for the moving iron core (233).

2. The reversing valve according to claim 1, characterized in that: One side of the valve body (1) is provided with at least two outlet ends (11), and the other side of the valve body (1) is provided with at least one inlet end (12), and a recessed groove (13) is provided between the inlet end (12) and the two outlet ends (11).

3. The reversing valve according to claim 2, characterized in that: The valve body (1) is provided with a channel (14) in communication with the outlet end (11) and the inlet end (12); the channel (14) is provided with a valve core (4) that can move left and right; an O-ring (41) is provided on the outer wall of the valve core (4); and the valve core (4) abuts against the inner wall of one of the undercut grooves (13).

4. The reversing valve according to claim 3, characterized in that: A stopper (5) is provided at the other end of the valve body (1), wherein a return spring (51) is provided in the stopper (5) and abuts against the valve core (4).

5. The reversing valve according to claim 1, characterized in that: A first retaining ring (211) is provided at the outlet of the guide sleeve (21).

6. The reversing valve according to claim 5, characterized in that: The outer wall of the movable iron core (23) is provided with a first stopper (234) and is slidably arranged in the guide sleeve (21); the first stopper (234) is provided with a plurality of insertion holes (235).

7. The reversing valve according to claim 6, characterized in that: The movable iron core (23) is provided with a locking sleeve (25), and the locking sleeve (25) is provided with an inserting block (251) corresponding to the insertion hole (235). The inserting block (251) is provided with inclined blocks (252) on both sides and abuts against the two side walls of the insertion hole (235). A sliding groove (26) for accommodating the ball (24) is provided between the locking sleeve (25) and the first stop portion (234). The outer wall of the locking sleeve is provided with an oil groove (253) corresponding to the oil outlet hole (232). The oil groove (253) is provided with an inclined surface (254) and faces the ball (24).

8. The reversing valve according to any one of claims 2 to 7, characterized in that: The damping assembly (3) comprises a support knob (31) and a push rod (32); a blind hole (33) is provided in the support knob (31); a second stop ring (331) is provided in the blind hole (33); the push rod (32) is provided with a second stop portion (321) and is slidably arranged in the blind hole (33); a buffer spring (34) is provided in the blind hole (33) and abuts against the second stop portion (321).

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