CN211975566U

CN211975566U - Hydraulic reversing valve

Info

Publication number: CN211975566U
Application number: CN202020512615.3U
Authority: CN
Inventors: 姚俊平
Original assignee: Shanxi Fuland Hydraulic Technology Co ltd
Current assignee: Shanxi Fuland Hydraulic Technology Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-11-20
Anticipated expiration: 2030-04-09

Abstract

The utility model relates to a switching-over valve technical field just discloses a hydraulic pressure switching-over valve, which comprises a valve body, the fixed intercommunication in top of valve body surface has a pipe and No. two pipes, the fixed intercommunication in bottom of valve body surface has No. three pipes and No. four pipes, sealed head has been cup jointed in the inside activity of valve body, the quantity of sealed head is two, two fixedly connected with valve rod between the sealed head, the surface of valve rod is turned left from the right side and is fixed No. one case and No. two cases of having cup jointed respectively. This hydraulic reversing valve, through seting up the through-hole at the surface of valve body to make through-hole and fixed cover intercommunication, do benefit to the closing plate of movable rod bottom and realize the sealed of through-hole, when the inside a large amount of bubbles of valve body broke, the inside atmospheric pressure of valve body reduces, drive the closing plate and move down, make inside air supply of fixed cover get into the valve body inside, balanced atmospheric pressure reduces the follow-up rupture of bubble, avoid the rupture of continuation bubble to cause the pitting of valve body inner wall to lose, extension valve body life.

Description

Hydraulic reversing valve

Technical Field

The utility model relates to a switching-over valve technical field specifically is a hydraulic pressure switching-over valve.

Background

The hydraulic reversing valve is divided into the following parts according to the number of passages held by the reversing valve: two-way, three-way, four-way and five-way, etc. by applying the absolute movement of valve core error valve body, the oil circuit can be communicated, closed or changed in the oil flowing direction, so that the hydraulic pressure fulfillment element and its driving mechanism can bear, end or change the movement direction.

When the existing hydraulic reversing valve is used, because bubbles exist in the flowing process of hydraulic oil, when a valve core acts, the bubbles in a valve body are broken in a large quantity, the locally broken bubbles form instant local negative pressure, cavitation blasting occurs, and frequent cavitation blasting easily causes the inner surface of the valve body to be sunken, so that the service life of the valve body is influenced, and the sealing effect of the valve core is reduced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a hydraulic reversing valve possesses the advantage of avoiding the cavitation blasting and improving lubrication, has solved the problem mentioned in the above-mentioned background art.

The utility model provides a following technical scheme: a hydraulic reversing valve comprises a valve body, a first pipe and a second pipe are fixedly communicated with the top of the outer surface of the valve body, the bottom of the outer surface of the valve body is fixedly communicated with a third pipe and a fourth pipe, the interior of the valve body is movably sleeved with a sealing head, the number of the sealing heads is two, a valve rod is fixedly connected between the two sealing heads, a first valve core and a second valve core are respectively and fixedly sleeved on the outer surface of the valve rod from right to left, the top surface of the outer surface of the valve body is provided with a through hole, the top surface of the through hole is fixedly communicated with a fixed sleeve, the inner part of the fixed sleeve is movably sleeved with a movable rod, the outer surface of the movable rod is fixedly sleeved with a connecting plate, the lower end of the movable rod is fixedly connected with a sealing plate, a fixing ring is fixedly sleeved in the through hole, the fixed ring is movably sleeved with the outer surface of the movable rod, and a second spring is fixedly connected between the connecting plate and the fixed sleeve.

Preferably, a sleeve hole is formed in the fixing ring, and the inner surface of the sleeve hole is movably sleeved with the movable rod.

Preferably, the sealing plate is located at the lower part of the fixing ring, the diameter of the sealing plate is smaller than that of the through hole, and the diameter of the sealing plate is larger than that of the trepan boring.

Preferably, the right side surface of one sealing head is fixedly connected with a first spring, the right end of the first spring is fixedly connected with the inner surface of the valve body, the right side surface of the valve body is provided with an oil hole, and the right end of the oil hole is fixedly communicated with a storage sleeve.

Preferably, the left side face of the valve body is in threaded sleeve connection with a threaded rod, and the left side face of the valve body is provided with an air hole.

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. this hydraulic reversing valve, through seting up the through-hole at the surface of valve body to make through-hole and fixed cover intercommunication, do benefit to the closing plate of movable rod bottom and realize the sealed of through-hole, when the inside a large amount of bubbles of valve body broke, the inside atmospheric pressure of valve body reduces, drive the closing plate and move down, make inside air supply of fixed cover get into the valve body inside, balanced atmospheric pressure reduces the follow-up rupture of bubble, avoid the rupture of continuation bubble to cause the pitting of valve body inner wall to lose, extension valve body life.

2. This hydraulic reversing valve through add the storage cover at the valve body right-hand member to pour into the lubricating oil in the cavity that right side seal block and valve body formed, drive the lubricating oil extrusion and lubricate a spring during spring compression, the partial lubricating oil extrusion is impressed in the storage cover, the lubricating oil backward flow when spring extension, improve the lubricated effect of a spring and valve body inner wall, avoid a spring excessive wear, prolong a spring life, improve the accuracy nature of reversing valve, excellent in use effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the structure of the present invention;

fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

In the figure: 1. a valve body; 2. a first pipe; 3. a valve stem; 4. a first valve core; 5. a sealing head; 6. a threaded rod; 7. a first spring; 8. a through hole; 9. fixing a sleeve; 10. a movable rod; 11. a fixing ring; 12. a sealing plate; 13. a connecting plate; 14. a second spring; 15. a storage sleeve; 16. an oil hole; 17. air holes; 18. a second pipe; 19. a third pipe; 20. a fourth tube; 21. a second valve core; 22. and (5) trepanning.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a hydraulic directional control valve comprises a valve body 1, a first pipe 2 and a second pipe 18 are fixedly communicated with the top of the outer surface of the valve body 1, a third pipe 19 and a fourth pipe 20 are fixedly communicated with the bottom of the outer surface of the valve body 1, two sealing heads 5 are movably sleeved in the valve body 1, a valve rod 3 is fixedly connected between the two sealing heads 5, a first valve core 4 and a second valve core 21 are respectively and fixedly sleeved on the outer surface of the valve rod 3 from right to left, a through hole 8 is formed in the top surface of the outer surface of the valve body 1, a fixing sleeve 9 is fixedly communicated with the top surface of the through hole 8, a movable rod 10 is movably sleeved in the fixing sleeve 9, a connecting plate 13 is fixedly sleeved on the outer surface of the movable rod 10, a sealing plate 12 is fixedly connected with the lower end of the movable rod 10, a fixing ring 11 is fixedly sleeved in the through hole 8, the fixing, a second spring 14 is fixedly connected between the connecting plate 13 and the fixed sleeve 9.

Wherein, the fixed ring 11 is provided with a trepanning 22 inside, the inner surface of the trepanning 22 is movably sleeved with the movable rod 10, and the trepanning 22 is used for air inlet and outlet, so that the air enters the valve body 1 through the fixed sleeve 9 to perform air pressure compensation, and the continuous rupture of bubbles is avoided.

Wherein, the sealing plate 12 is located the lower part of solid fixed ring 11, and the diameter of sealing plate 12 is less than the diameter of through-hole 8, and the diameter of sealing plate 12 is greater than the diameter of trepanning 22, and sealing plate 12 seals trepanning 22 under the pulling of No. two spring 14, realizes sealedly, and avoids sealing plate 12 to seal through-hole 8 completely.

Wherein, the right flank fixedly connected with spring 7 of a sealing head 5, the right-hand member of spring 7 and the internal surface fixed connection of valve body 1, oilhole 16 has been seted up to the right flank of valve body 1, the fixed intercommunication of right-hand member of oilhole 16 has storage cover 15, when spring 7 compresses, lubricating oil flows into in to storage cover 15 via oilhole 16, receive the extrusion to obtain lubricating oil vibrations and effectively lubricate spring 7, when spring 7 is tensile, lubricating oil flows back to valve body 1 inside via oilhole 16, lubricate once more, reduce spring 7's friction loss.

Wherein, threaded rod 6 has been cup jointed to the left surface screw thread of valve body 1, and gas pocket 17 has been seted up to the left surface of valve body 1, and through rotating threaded rod 6, the removal of control valve rod 3 realizes the switching-over, and gas pocket 17 is used for ventilating, avoids left sealed head 5 and valve body 1 to form airtight cavity and removes obstructed.

The working principle is as follows: rotating threaded rod 6, make threaded rod 6 rotate the right side and slide, extrude sealed head 5 on right side, make valve rod 3 drive a case 4 and No. two case 21 right side slide respectively to No. two right sides of No. 18 and No. 2 of pipe, sealed head 5 extrusion spring 7 on right side simultaneously, the lubricating oil gets into storage cover 15 via oilhole 16, hydraulic oil switching-over, the bubble is broken, the inside atmospheric pressure of valve body 1 reduces, closing plate 12 moves down and drives movable rod 10 and move down, No. two spring 14 are tensile, fixed 9 kinds of gas of cover flows into in valve body 1 via the hole of solid fixed ring 11, the atmospheric pressure is balanced in valve body 1, the bubble is broken and is stopped, No. two spring 14 resets, closing plate 12 resets.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A hydraulic directional control valve, includes valve body (1), its characterized in that: the top of the outer surface of the valve body (1) is fixedly communicated with a first pipe (2) and a second pipe (18), the bottom of the outer surface of the valve body (1) is fixedly communicated with a third pipe (19) and a fourth pipe (20), sealing heads (5) are sleeved in the inner part of the valve body (1) in a movable manner, two sealing heads (5) are fixedly connected between the two sealing heads (5), a valve rod (3) is fixedly connected between the two sealing heads (5), a first valve core (4) and a second valve core (21) are respectively sleeved on the outer surface of the valve rod (3) from the right side to the left side, a through hole (8) is formed in the top surface of the outer surface of the valve body (1), a fixing sleeve (9) is fixedly communicated with the top surface of the through hole (8), a movable rod (10) is sleeved in the inner part of the fixing sleeve (9), a connecting plate (13) is fixedly sleeved on the outer surface of the movable rod (10), and, fixed ring (11) have been cup jointed to the inside of through-hole (8) is fixed, gu fixed ring (11) cup joints with the surface activity of movable rod (10), fixedly connected with No. two spring (14) between connecting plate (13) and fixed cover (9).

2. A hydraulic directional control valve as defined in claim 1 wherein: a sleeve hole (22) is formed in the fixing ring (11), and the inner surface of the sleeve hole (22) is movably sleeved with the movable rod (10).

3. A hydraulic directional control valve as defined in claim 2, wherein: the sealing plate (12) is located at the lower part of the fixing ring (11), the diameter of the sealing plate (12) is smaller than that of the through hole (8), and the diameter of the sealing plate (12) is larger than that of the trepanning hole (22).

4. A hydraulic directional control valve as defined in claim 1 wherein: the right side surface of one sealing head (5) is fixedly connected with a first spring (7), the right end of the first spring (7) is fixedly connected with the inner surface of the valve body (1), the right side surface of the valve body (1) is provided with an oil hole (16), and the right end of the oil hole (16) is fixedly communicated with a storage sleeve (15).

5. A hydraulic directional control valve according to claim 4, wherein: the left side of valve body (1) screw thread cover has threaded rod (6), gas pocket (17) have been seted up to the left surface of valve body (1).