CN114294468A

CN114294468A - Locking device for operating rod of reversing valve

Info

Publication number: CN114294468A
Application number: CN202210024075.8A
Authority: CN
Inventors: 臧其刚; 陈梅
Original assignee: Pizhou Hongsheng Hydraulic Components Co ltd
Current assignee: Pizhou Hongsheng Hydraulic Components Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-04-08
Anticipated expiration: 2042-01-11
Also published as: CN114294468B

Abstract

The invention discloses a locking device for an operating rod of a reversing valve, and belongs to the technical field of reversing valves. Comprises a valve body, an operating rod and a valve core rod; the operating rod comprises a hollow square rod; the lower end of the square rod is fixed with a shifting block; a sliding block is slidably sleeved in the square rod, and a handle is fixed at the upper end of the sliding block; the rotating shaft is fixedly connected in the valve body, penetrates through the square rod and is rotatably connected with the square rod; an elliptic cylindrical locking block is fixed in the middle of the rotating shaft in the square rod, and the locking block and the rotating shaft are coaxially arranged; the lower end of the sliding block is provided with two wedge-shaped plates in a sliding way, and the two wedge-shaped plates are symmetrically arranged; a spring is arranged between the upper end of the wedge-shaped plate and the sliding block; the lower end of the wedge-shaped plate is positioned between the inner wall of the square rod and the locking block. According to the invention, the handle is pulled upwards for a certain distance, and the handle is unlocked; the handle is pressed downwards for a certain distance and is self-locked; the operation is simple, and the locking can be carried out at any position, so that the valve can also be applied to proportional valves, combination valves and the like.

Description

Locking device for operating rod of reversing valve

Technical Field

The invention relates to the technical field of reversing valves, in particular to a locking device for an operating rod of a reversing valve.

Background

The reversing valve is a direction control valve with more than two flow forms and more than two oil ports and is a direction control valve depending on the relative movement of the valve core and the valve body. The common reversing valve is generally characterized in that a handle is connected with a rotating shaft, the rotating shaft is connected with a cam disc, and when the handle is operated, the rotating shaft drives the cam disc to rotate, so that the reversing function is realized. When the reversing valve group is not operated, the operating handle can also easily generate misoperation due to the forms of accidental collision, extrusion and the like, thereby damaging equipment to influence production and even leading to personal safety accidents. Therefore, in some devices, the reversing valve operating lever is equipped with a locking device.

Chinese patent discloses a locking device (CN 212338372U) of a reversing valve handle, which comprises a reversing valve body, a first internal thread hole, a handle and a second fixing plate. This locking device of switching-over valve handle is provided with limiting plate, three second internal thread holes of group, fixed screw and first internal thread hole, and after accomplishing the handle regulation on this switching-over valve, through letting the fixed screw run through the downthehole portion of second internal thread directly over the limiting plate, cause the fixed screw to be connected with first internal thread hole, when making the limiting plate obtain spacingly like this, make the handle obtain spacing fixed.

Above-mentioned technique links to each other through fixed screw and first internal thread hole and guarantees the handle position, and fixed screw still needs use tools, leads to the operation convenient inadequately, can not realize quick unblock and locking, under the comparatively frequent operating mode of switching-over, and is impractical.

Disclosure of Invention

In order to solve the technical problem, the invention provides a locking device for an operation rod of a reversing valve.

The invention is realized by the following technical scheme: a locking device for an operation rod of a reversing valve comprises a valve body and an operation rod hinged on the valve body, wherein the lower end part of the operation rod is connected with a valve core rod in the valve body; the operating rod comprises a hollow square rod; the lower end of the square rod is fixed with a shifting head which is connected with the valve core rod; a sliding block is slidably sleeved in the square rod, a handle is fixed at the upper end of the sliding block, and the upper end of the handle extends out of the square rod; the rotating shaft is fixedly connected in the valve body, penetrates through the square rod and is rotatably connected with the square rod; an elliptic cylindrical locking block is fixed in the middle of the rotating shaft in the square rod, and the locking block and the rotating shaft are coaxially arranged; the lower end of the sliding block is provided with two wedge-shaped plates in a sliding manner, and the two wedge-shaped plates are symmetrically arranged; a spring is arranged between the upper end of the wedge-shaped plate and the sliding block and provides a downward movement force for the wedge-shaped plate; the lower end of the wedge-shaped plate is positioned between the inner wall of the square rod and the locking block.

It further comprises the following steps: the shifting block is fixed at the lower end of the square rod through a flange, and a sliding column is fixed at the lower end of the shifting block; the sliding column is movably arranged in the sliding groove.

The sliding block is welded and fixed with the handle; an upper cover is fixed at the upper end of the square rod through a flange, and a handle penetrates through the upper cover in a sliding mode.

And a boss used for limiting the sliding block is fixed on the inner wall of the square rod above the sliding block.

The lower end of the sliding block is fixedly connected with a sealing plate through a bolt, and the sealing plate is pressed on a step on the wedge-shaped plate.

A through groove for the square rod to rotate is formed in the valve body, and an ear plate is fixed below the through groove; and two ends of the rotating shaft are fixed on the ear plates.

The upper end of the handle is sleeved with an anti-slip sleeve.

Compared with the prior art, the invention has the beneficial effects that: the handle is pulled upwards for a certain distance, the wedge-shaped plate and the locking block are unlocked, and the handle can be automatically operated to shift the valve core rod to change the direction; pressing the handle downwards for a certain distance, locking the wedge-shaped plate and the locking block, and finishing self-locking when the handle cannot rotate; the invention has simple operation and can be locked at any position, thus being also applied to proportional valves, combination valves and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a view from a-a in fig. 1.

Fig. 3 and 4 are schematic views of the operation process of the embodiment of the invention.

In the figure: 1. a valve body; 1-1, a through groove; 1-2, ear plates; 2. a valve core rod; 2-1, a chute; 3. a slider; 4. a shifting block; 4-1, a sliding column; 5. a square bar; 5-1, boss; 6. a handle; 7. a rotating shaft; 8. a locking block; 9. a wedge-shaped plate; 10. a spring; 11. closing the plate; 12. an anti-slip sleeve; 13. and (7) covering.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figures 1 and 2, the reversing valve operating rod locker comprises a lower shifting block 4, a middle square rod 5 and an upper handle 6. The shifting block 4 is fixed at the lower end of the square rod 5 through a flange, a pair of support plates are fixed at the lower end of the shifting block 4, and a sliding column 4-1 is fixed between the support plates. The end part of the valve core rod 2 penetrates through a support plate at the lower end of the shifting block 4, a vertical chute 2-1 is formed in the end part of the valve core rod 2, and the sliding column 4-1 is movably located in the chute 2-1. When the shifting block 4 swings, the sliding column 4-1 can push the valve core rod 2 to realize the reversing of the valve core.

The valve body 1 is provided with a through groove 1-1, and the square rod 5 penetrates through the through groove 1-1. The ear plates 1-2 are fixed under the through groove 1-1, and the rotating shaft 7 is fixed between the two ear plates 1-2. The rotating shaft 7 penetrates through the square rod 5, and the rotating shaft 7 is rotatably connected with the square rod 5. An elliptic cylindrical locking block 8 is fixed in the middle of the rotating shaft 7, and the locking block 8 and the rotating shaft 7 are coaxially arranged.

The two sides of the lower end of the sliding block 3 are respectively provided with a sliding hole, a wedge-shaped plate 9 is slidably arranged in the sliding hole, and the two wedge-shaped plates 9 are symmetrically arranged. A spring 10 is arranged between the upper end of the wedge-shaped plate 9 and the sliding block 3, and the spring 10 gives a downward movement force to the wedge-shaped plate 9. The closing plate 11 is fixed at the lower end of the sliding block 3 through bolt connection, and the closing plate 11 is pressed on a step on the wedge-shaped plate 9 to prevent the wedge-shaped plate 9 from sliding out. The lower end of the wedge-shaped plate 9 is positioned between the inner wall of the square rod 5 and the locking block 8, and the inclined surface of the wedge-shaped plate 9 is matched with the tip end of the locking block 8 to realize locking by using friction force.

And a boss 5-1 is fixed on the inner wall of the square rod 5 and used for limiting the upward moving distance of the sliding block 3. An upper cover 13 is fixed at the upper end of the square rod 5 through a flange, and the handle 6 penetrates through the upper cover 13 in a sliding mode. The upper end of the handle 6 is sleeved with an anti-skid sleeve 12, which is convenient for an operator to grasp.

The working process is as follows: referring to fig. 3 and 4, when the handle 6 is pulled upwards for a certain distance, the wedge-shaped plate 9 is separated from the lock block 8, the handle 6 is unlocked, and the handle 6 can be automatically operated, so that the valve core rod 2 is shifted to change the direction; after the handle 6 is pressed downwards for a certain distance to a preset position, the wedge-shaped plate 9 is attached to the locking block 8 (the side surface of the wedge-shaped plate 9 is also attached to the square rod), the wedge-shaped plate 9 and the locking block 8 can not rotate relatively through friction force, and the handle 6 is locked; the handle 6 is simple to operate and can be locked in any position.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A locking device for an operation rod of a reversing valve comprises a valve body (1) and an operation rod hinged on the valve body (1), wherein the lower end part of the operation rod is connected with a valve core rod (2) in the valve body (1); the method is characterized in that:

the operating rod comprises a hollow square rod (5); a shifting block (4) is fixed at the lower end of the square rod (5), and the shifting block (4) is connected with the valve core rod (2); a sliding block (3) is slidably sleeved in the square rod (5), a handle (6) is fixed at the upper end of the sliding block (3), and the upper end of the handle (6) extends out of the square rod (5);

a rotating shaft (7) is fixedly connected in the valve body (1), the rotating shaft (7) penetrates through the square rod (5), and the rotating shaft (7) is rotatably connected with the square rod (5); an elliptic cylindrical locking block (8) is fixed in the middle of the rotating shaft (7) positioned in the square rod (5), and the locking block (8) and the rotating shaft (7) are coaxially arranged;

the lower end of the sliding block (3) is provided with two wedge-shaped plates (9) in a sliding manner, and the two wedge-shaped plates (9) are symmetrically arranged; a spring (10) is arranged between the upper end of the wedge-shaped plate (9) and the sliding block (3), and the spring (10) provides a downward movement force for the wedge-shaped plate (9); the lower end of the wedge-shaped plate (9) is positioned between the inner wall of the square rod (5) and the locking block (8).

2. The diverter valve lever locker of claim 1, wherein: the shifting block (4) is fixed at the lower end of the square rod (5) through a flange, and a sliding column (4-1) is fixed at the lower end of the shifting block (4); the end part of the valve core rod (2) is provided with a sliding groove (2-1), and the sliding column (4-1) is movably positioned in the sliding groove (2-1).

3. The diverter valve lever locker of claim 1, wherein: the sliding block (3) is welded and fixed with the handle (6); an upper cover (13) is fixed at the upper end of the square rod (5) through a flange, and the handle (6) penetrates through the upper cover (13) in a sliding mode.

4. The diverter valve lever locker of claim 1, wherein: and a boss (5-1) used for limiting the sliding block (3) is fixed on the inner wall of the square rod (5) above the sliding block (3).

5. The diverter valve lever locker of claim 1, wherein: the lower end of the sliding block (3) is fixedly connected with a sealing plate (11) through a bolt, and the sealing plate (11) is pressed on a step on the wedge-shaped plate (9).

6. The diverter valve lever locker of claim 1, wherein: a through groove (1-1) for the square rod (5) to rotate is formed in the valve body (1), and an ear plate (1-2) is fixed below the through groove (1-1); two ends of the rotating shaft (7) are fixed on the ear plates (1-2).

7. The diverter valve lever locker of claim 1, wherein: the upper end of the handle (6) is sleeved with an anti-skid sleeve (12).