CN214466316U

CN214466316U - Operation change valve

Info

Publication number: CN214466316U
Application number: CN202022204656.9U
Authority: CN
Inventors: 陈纪恩; 方宇; 周也萍
Original assignee: Wenzhou Ji'an Machinery Co ltd
Current assignee: Wenzhou Ji'an Machinery Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-10-22
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses an operation reversing valve, which comprises a valve body, a valve cover, a valve core component and an operation mechanism; the operating mechanism comprises a cam, a pressing arm and a handle which are arranged on the valve cover; the cam is rotatably arranged in the valve cover through a wheel shaft, and the two pressure arms are symmetrically arranged and are respectively contacted with the cam surface; the cam and the wheel shaft are fixed together through a locking screw, and the handle is fixedly connected with the parts of the two ends of the wheel shaft, which extend out of the valve cover; the valve cover is fixed on the valve body through a connecting piece, and the two groups of valve core assemblies are arranged in the valve body and are arranged below the two pressure arms in a one-to-one correspondence manner; the utility model discloses an operation switching-over valve has carried out optimal design to operating mechanism, and simple structure is compact, and the part is few with low costs.

Description

Operation change valve

Technical Field

The utility model belongs to the technical field of the valve, especially, relate to a control reversing valve.

Background

The reversing valve is a directional control valve with more than two flow forms and more than two oil ports. The hydraulic oil flow control valve is a valve for realizing the flow, cut-off and reversing of hydraulic oil, pressure unloading and sequential action control. The control is usually carried out by the relative movement of the valve core and the valve body; because the reversing valve relates to the switching control of a plurality of groups of valve cores, the operating mechanism of the reversing valve is various, the structure is extremely complex, and the overall cost of the valve is increased.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a control switching-over valve has carried out optimal design, simple structure compactness, and the part is few with low costs to operating mechanism.

The utility model discloses an operation reversing valve, which comprises a valve body, a valve cover, a valve core component and an operation mechanism; the operating mechanism comprises a cam, a pressing arm and a handle which are arranged on the valve cover; the cam is rotatably arranged in the valve cover through a wheel shaft, and the two pressure arms are symmetrically arranged and are respectively contacted with the cam surface; the cam and the wheel shaft are fixed together through a locking screw, and the handle is fixedly connected with the parts of the two ends of the wheel shaft, which extend out of the valve cover; the valve cover is fixed on the valve body through a connecting piece, and the two groups of valve core assemblies are arranged in the valve body and are arranged below the two pressure arms in a one-to-one correspondence manner; the position of the valve cover mounted on the valve body is taken as the upper side, so that the valve cover is arranged above, the valve body is arranged below, the pressure arm is arranged above, and the valve core assembly is arranged below; the cam surface is of a multi-segment arc-line structure, the whole structure is symmetrical, when the handle is manually operated, the cam is driven to rotate through the wheel shaft, one pressure arm is pressed down, the other pressure arm is synchronously controlled to rise, the number of integral parts is greatly reduced compared with the prior art, and the manufacturing cost is greatly reduced.

Further, the middle part of the inner side of the valve cover is provided with an arc-shaped groove used for installing a cam, the top surface of the middle part of the valve cover forms an arc surface concentric with the wheel shaft, the handle is internally provided with a spring and a positioning steel ball, the positioning steel ball is pressed on the arc surface of the valve cover through the elastic action of the spring, the center of the arc surface is provided with a positioning groove corresponding to the positioning steel ball, the depth of the positioning groove is smaller than the radius of the positioning steel ball, and the handle can be limited and convenient to use when being located at the middle position.

Furthermore, the wheel shaft is provided with a locking groove corresponding to the locking screw, the locking screw is connected with the cam through threads and inserted into the locking groove, so that the cam and the wheel shaft are stably fixed together and are convenient to assemble.

Furthermore, the handle and the two ends of the wheel shaft are fixed through the pin screws, the wheel shaft is inserted among the cam, the valve cover and the handle during assembly, then the locking screws are installed, after the cam and the wheel shaft are fixed, the cam and the wheel shaft are rotated to be in the right position, the handle and the wheel shaft are fixed through the pin screws, and under the condition that convenience in installation is guaranteed, structural interference is avoided.

Furthermore, two parallel mounting cavities, an upper connecting hole and a lower connecting hole which are respectively communicated with the two mounting cavities are arranged in the valve body; a group of valve core assemblies are arranged in each installation cavity, each valve core assembly comprises a valve rod, a core sleeve, an upper valve sleeve, a middle sleeve, a lower valve sleeve and a pressure spring, the upper valve sleeve is connected to the inner wall of the installation cavity through threads and tightly presses and fixes the middle sleeve and the lower valve sleeve in the installation cavity, the core sleeve is slidably arranged in the lower valve sleeve, the pressure springs are supported between the core sleeve and the lower valve sleeve, the valve rods are slidably arranged in the upper valve sleeve and are butted between the core sleeves through conical surfaces, and the upper ends of the valve rods extend to the lower parts of the corresponding pressure arms; the side wall of the upper valve sleeve is provided with a side guide hole communicated with the upper connecting hole, the side wall of the lower valve sleeve is provided with a side guide hole communicated with the lower connecting hole, the part of the core sleeve opposite to the middle sleeve is provided with a side hole closed by the middle sleeve, when the valve rod is pressed down under the action of the pressing arm, the corresponding core sleeve is driven to move downwards, so that the side hole on the core sleeve is staggered with the middle sleeve, and further communicated with the lower connecting hole through the side guide hole on the lower valve sleeve; meanwhile, the other valve rod moves upwards and is separated from the corresponding core sleeve to generate a gap, the gap is communicated with the upper connecting hole through the side flow guide hole on the upper valve sleeve, and when the two valve rods are controlled to switch through the operating mechanism, the inner holes of the two core sleeves are switched and communicated with the upper connecting hole and the lower connecting hole; when the handle of the operating mechanism is in the middle position, the valve rod and the core sleeve are butted together without a gap, and meanwhile, the side hole of the core sleeve is sealed by the middle sleeve, so that the control effect of cutting off is achieved.

Furthermore, the lower end of each mounting cavity is provided with a joint; a lever is connected between the two valve rods, the middle part of the lever is arranged on the valve body through a rotating shaft, and the two valve rods keep reverse action by utilizing the action of the lever.

The utility model has the advantages that: the utility model discloses an operation switching-over valve has carried out optimal design to operating mechanism, and simple structure is compact, and the part is few with low costs.

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 embodiments or the technical solutions in the prior art will be briefly described below. In the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

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

fig. 2 is a top view of fig. 1.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 1 and 2: the operation reversing valve comprises a valve body 2, a valve cover 1, a valve core assembly and an operation mechanism; the operating mechanism comprises a cam 15, a pressing arm 12 and a handle 9 which are arranged on the valve cover 1; the cam 15 is rotatably mounted inside the valve cover 1 through a wheel shaft 16, and the two pressure arms 12 are symmetrically arranged and are respectively in surface contact with the cam 15; the cam 15 and the wheel shaft 16 are fixed together through a locking screw 11, and the handle 9 is fixedly connected with the part of the two ends of the wheel shaft 16 extending out of the valve cover 1; the valve cover 1 is fixed on the valve body 2 through a connecting piece, and the two groups of valve core assemblies are arranged in the valve body 2 and are arranged below the two pressure arms 12 in a one-to-one correspondence manner; the position of installing the valve cover 1 on the valve body 2 is taken as the upper side, so that the valve cover 1 is arranged above, the valve body 2 is arranged below, the pressure arm 12 is arranged above, and the valve core assembly is arranged below; the surface of the cam 15 is of a multi-section arc line type structure, the cam is of a symmetrical structure as a whole, when the handle 9 is manually operated, the cam 15 is driven to rotate through the wheel shaft 16, one pressure arm 12 is pressed down, the other pressure arm 12 is lifted up to be synchronously controlled, the number of integral parts is greatly reduced compared with the prior art, and the manufacturing cost is greatly reduced.

In this embodiment, the middle part of the inner side of the valve cover 1 is an arc-shaped groove for installing the cam 15, the top surface of the middle part of the valve cover 1 forms an arc surface concentric with the wheel shaft 16, the handle 9 is internally provided with a spring and a positioning steel ball, the positioning steel ball is pressed on the arc surface of the valve cover 1 through the elastic action of the spring, the center position of the arc surface is provided with a positioning groove corresponding to the positioning steel ball 10, the depth of the positioning groove is smaller than the radius of the positioning steel ball 10, and the handle 9 can be limited and convenient to use when being located at the middle position.

In this embodiment, the locking groove is formed on the wheel shaft 16 corresponding to the locking screw 11, and the locking screw 11 is connected with the cam 15 by a screw thread and inserted into the locking groove, so that the cam 15 and the wheel shaft 16 are stably fixed together, and the assembly is convenient.

In this embodiment, the handle 9 and the two ends of the axle 16 are fixed by the pin screws 5, the axle 16 is inserted between the cam 15, the valve cover 1 and the handle 9 during assembly, then the locking screw 11 is installed, after the cam 15 and the axle 16 are fixed, the cam 15 and the axle 16 are rotated to the right position, the handle 9 and the axle 16 are fixed by the pin screws 5, and under the condition that convenience in installation is guaranteed, structural interference is avoided.

In this embodiment, two parallel mounting cavities, and an upper connecting hole 13 and a lower connecting hole 14 which are respectively communicated with the two mounting cavities are arranged in the valve body 2; a group of valve core assemblies are arranged in each installation cavity, each valve core assembly comprises a valve rod 6, a core sleeve 3, an upper valve sleeve 17, a middle sleeve 18, a lower valve sleeve 19 and a pressure spring, the upper valve sleeve 17 is connected to the inner wall of the installation cavity through threads and tightly presses and fixes the middle sleeve 18 and the lower valve sleeve 19 in the installation cavity, the core sleeves 3 are slidably arranged in the lower valve sleeves 19, the pressure springs are supported between the core sleeves 3 and the lower valve sleeves 19, the valve rods 6 are slidably arranged in the upper valve sleeves 17 and are butted with each other through conical surfaces between the core sleeves 3, and the upper ends of the valve rods 6 extend to the lower parts of the corresponding pressure arms 12; the side wall of the upper valve sleeve 17 is provided with a side guide flow hole communicated with the upper connecting hole 13, the side wall of the lower valve sleeve 19 is provided with a side guide flow hole communicated with the lower connecting hole 14, the part of the core sleeve 3 opposite to the middle sleeve 18 is provided with a side hole closed by the middle sleeve 18, when the valve rod 6 is pressed down under the action of the pressing arm 12, the corresponding core sleeve 3 is driven to descend, so that the side hole on the core sleeve 3 is staggered with the middle sleeve 18, and further, the side guide flow hole on the lower valve sleeve 19 is communicated with the lower connecting hole 14; meanwhile, the other valve rod 6 moves upwards and is separated from the corresponding core sleeve 3 to generate a gap, the gap is communicated with the upper connecting hole 13 through the side flow guide hole on the upper valve sleeve 17, and when the two valve rods 6 are controlled to switch through the operating mechanism, the inner holes of the two core sleeves 3 are switched and communicated with the upper connecting hole 13 and the lower connecting hole 14; when the handle 9 of the operating mechanism is in the middle position, the valve rod 6 and the core sleeve 3 are butted together without gaps, and meanwhile, the side hole of the core sleeve 3 is sealed by the middle sleeve 18, so that the control effect of cutting off is achieved.

In the embodiment, the lower end of each mounting cavity is provided with a joint 4; a lever 7 is connected between the two valve rods 6, the middle part of the lever 7 is arranged on the valve body 2 through a rotating shaft 8, and the two valve rods 6 keep reverse action by utilizing the action of the lever 7.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. A pilot operated directional control valve characterized by: comprises a valve body, a valve cover, a valve core assembly and an operating mechanism; the operating mechanism comprises a cam, a pressing arm and a handle which are arranged on the valve cover; the cam is rotatably arranged in the valve cover through a wheel shaft, and the two pressure arms are symmetrically arranged and are respectively contacted with the cam surface; the cam and the wheel shaft are fixed together through a locking screw, and the handle is fixedly connected with the parts of the two ends of the wheel shaft, which extend out of the valve cover; the valve cover is fixed on the valve body through a connecting piece, and the two groups of valve core assemblies are arranged in the valve body and are arranged below the two pressure arms in a one-to-one correspondence mode.

2. The pilot operated directional valve according to claim 1, wherein: the middle part of the inner side of the valve cover is provided with an arc-shaped groove used for installing a cam, the top surface of the middle part of the valve cover forms an arc surface concentric with the wheel shaft, a spring and a positioning steel ball are installed in the handle, the positioning steel ball is pressed on the arc surface of the valve cover through the elastic action of the spring, and the center of the arc surface is provided with a positioning groove corresponding to the positioning steel ball.

3. The pilot operated directional valve according to claim 2, wherein: and the wheel shaft is provided with a locking groove corresponding to the locking screw, and the locking screw is connected with the cam through threads and is inserted into the locking groove.

4. The pilot operated directional valve according to claim 3, wherein: the handle is fixed with two ends of the wheel shaft through pin screws.

5. The steering valve according to any one of claims 1 to 4, wherein: two parallel mounting cavities, an upper connecting hole and a lower connecting hole which are respectively communicated with the two mounting cavities are arranged in the valve body; a group of valve core assemblies are arranged in each installation cavity, each valve core assembly comprises a valve rod, a core sleeve, an upper valve sleeve, a middle sleeve, a lower valve sleeve and a pressure spring, the upper valve sleeve is connected to the inner wall of the installation cavity through threads and tightly presses and fixes the middle sleeve and the lower valve sleeve in the installation cavity, the core sleeve is slidably arranged in the lower valve sleeve, the pressure springs are supported between the core sleeve and the lower valve sleeve, the valve rods are slidably arranged in the upper valve sleeve and are butted between the core sleeves through conical surfaces, and the upper ends of the valve rods extend to the lower parts of the corresponding pressure arms; the side wall of the upper valve sleeve is provided with a side diversion hole communicated with the upper connecting hole, the side wall of the lower valve sleeve is provided with a side diversion hole communicated with the lower connecting hole, and the part of the core sleeve opposite to the middle sleeve is provided with a side hole sealed by the middle sleeve.

6. The pilot operated directional valve according to claim 5, wherein: the lower end of each mounting cavity is provided with a joint; a lever is connected between the two valve rods, and the middle part of the lever is arranged on the valve body through a rotating shaft.