CN211202459U

CN211202459U - Pneumatic reversing valve for realizing slow reduction speed adjustment by utilizing valve core conical surface

Info

Publication number: CN211202459U
Application number: CN201921739425.9U
Authority: CN
Inventors: 吴焕毅; 郭源; 张开龙; 郭玉学; 王倩倩; 王妙哲
Original assignee: Hebei Rungong Hydraulic Machinery Co ltd; Shandong Wuzheng Group Co Ltd; Zhejiang Feidie Automobile Manufacturing Co Ltd
Current assignee: Hebei Rungong Hydraulic Machinery Co ltd; Shandong Wuzheng Group Co Ltd; Zhejiang Feidie Automobile Manufacturing Co Ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-08-07
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses an utilize case conical surface to realize slow speed down adjustable gas accuse switching-over valve, including the valve body that is provided with oil inlet, oil-out and oil return opening, be provided with the fuel feeding passageway of intercommunication oil inlet and oil-out in the valve body, be provided with the oil return passageway that communicates with the oil return opening in the valve body, be provided with overflow valve device between fuel feeding passageway and the oil return passageway, one end of valve body is provided with the descent control device, the other end of valve body is provided with the slow speed down device, but be provided with the case that axial motion control fuel feeding passageway and oil return passageway communicate or break off in the valve body, descent control device and slow speed down device are connected respectively to the case both; the flow control conical surface arranged on the valve core enables the radial clearance between the outer surface of the valve core and the inner surface of the oil duct to change, and the volume of oil flowing from the oil supply channel to the oil return channel in unit time is changed, so that the purpose of adjusting the slow-reducing speed is achieved.

Description

Pneumatic reversing valve for realizing slow reduction speed adjustment by utilizing valve core conical surface

Technical Field

The utility model relates to a gas accuse switching-over valve makes the field, especially relates to a can realize slow speed reduction adjustable gas accuse switching-over valve.

Background

The pneumatic control reversing valve is used as a key component in a pneumatic control hydraulic system, and the reliability of the hydraulic system is directly determined by the quality of the performance of the pneumatic control reversing valve. The conventional pneumatic control reversing valve achieves the purpose of slow descending and adjustment through the axial gap between the end face of the valve core and the oil duct of the valve body, but the gap variation is small, so that the requirement on the adjustment precision is high, and the subsequent adjustment and use are inconvenient.

The utility model with 2017215997661 provides a pneumatic control reversing valve with slow-down function, but in the process of realizing slow-down, the speed of slow-down is not adjustable. The valve body of the reversing valve is provided with an oil inlet, an oil outlet and an oil return port, an oil inlet channel for communicating the oil inlet and the oil outlet, an oil return passage communicated with the oil return port, a descending cylinder arranged at one end in the valve body, a descending air inlet communicated with the descending cylinder arranged at one end of the valve body, a descending piston arranged in the descending cylinder, a slow descending cylinder arranged at the other end in the valve body, a slow descending air inlet communicated with the slow descending cylinder arranged at one end of the valve body, a slow descending piston arranged in the slow descending cylinder, an overflow valve group arranged in the valve body, the overflow communication between the oil inlet channel and the oil return channel can be formed by the overflow channel which is arranged in the valve body, is communicated with the oil return channel and has one end opened outside the valve body, an adjusting screw is arranged in the overflow channel, a conical valve core is plugged at the communication hole, and a pressure regulating spring is arranged between the adjusting screw and the conical valve core in an overhead mode.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a pneumatic control reversing valve with adjustable slow-down speed is realized by utilizing a valve core conical surface at the adjustable slow-down speed in the slow-down process is provided.

In order to solve the technical problem, the technical scheme of the utility model is that: utilize case conical surface to realize slow speed reduction adjustable gas accuse switching-over valve, including the valve body that is provided with oil inlet, oil-out and oil return opening, be provided with the intercommunication in the valve body the oil inlet with the fuel feeding passageway of oil-out, be provided with in the valve body with the oil return passageway of oil return opening intercommunication, be provided with the overflow valve device between fuel feeding passageway and the oil return passageway, the one end of valve body is provided with the descent control device, the other end of valve body is provided with slowly falls the device, but be provided with axial motion control in the valve body fuel feeding passageway and the valve core of oil return passageway intercommunication or disconnection, the valve core both ends are connected respectively descent control device and slowly fall the device, be equipped with the accuse that steerable.

According to a preferable technical scheme, the descending device comprises a descending air chamber, a descending air inlet communicated with the descending air chamber is formed in the valve body, a descending piston is arranged in the descending air chamber in a sealing sliding mode, one end, close to the descending air chamber, of the valve core stretches into the descending air chamber and is connected with the descending piston, a return spring is sleeved at the stretching end of the valve core, and two ends of the return spring abut against the descending piston and the valve body respectively.

According to a preferable technical scheme, the slow-falling device comprises a slow-falling air chamber, a slow-falling piston is arranged in the slow-falling air chamber in a sealing sliding mode, the outer end of the slow-falling air chamber is located on the valve body, a hollow bolt is installed on the valve body through a limiting nut, and one end, close to the slow-falling device, of the valve core is inserted into the slow-falling air chamber and abuts against the slow-falling piston.

Preferably, an air channel is arranged at the axis of the hollow bolt, the air channel penetrates from the head of the hollow bolt and an air hole arranged on the side surface of the screw, and the air hole is communicated with the slow-descending air chamber.

As a preferable technical scheme, one side of the slow-falling piston, which is close to the hollow bolt, is provided with a positioning hole, and the hollow bolt stretches into the positioning hole.

As an improvement to the above technical solution, the overflow valve device includes an overflow channel disposed in the valve body, communicated with the oil return channel, and having an opening at one end disposed outside the valve body, the overflow channel is communicated with the oil supply channel via a communication hole, an adjusting bolt is disposed in the overflow channel, a conical valve core is plugged at the communication hole, and a pressure regulating spring is further disposed between the adjusting bolt and the conical valve core.

By adopting the technical scheme, the air control reversing valve with the adjustable slow-reducing speed is realized by utilizing the conical surface of the valve core, and comprises a valve body provided with an oil inlet, an oil outlet and an oil return port, an oil supply channel communicated with the oil inlet and the oil outlet is arranged in the valve body, an oil return channel communicated with the oil return port is arranged in the valve body, an overflow valve device is arranged between the oil supply channel and the oil return channel, a descending device is arranged at one end of the valve body, a slow-reducing device is arranged at the other end of the valve body, a valve core capable of controlling the communication or disconnection of the oil supply channel and the oil return channel through axial motion is arranged in the valve body, the two ends of the valve core are respectively connected with the descending device and. The beneficial effects are as follows: in the process of axial sliding of the valve core, the size of a through-flow section between the oil supply channel and the oil return channel is adjusted by utilizing a radial gap between the outer surface of the valve core and the inner surface of the oil channel, and the valve core is provided with the flow control conical surface, so that the radial gap between the outer surface of the valve core and the inner surface of the oil channel is changed, the volume of oil flowing from the oil supply channel to the oil return channel in unit time is changed, and the aim of adjusting the slow-down speed is fulfilled.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a valve stem according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a valve stem according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a hollow bolt according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a hollow bolt according to an embodiment of the present invention.

In the figure: 1-a valve body; 11-an oil inlet; 12-an oil outlet; 13-oil return port; 14-an oil supply channel; 15-an oil return channel; 2-a valve core; 21-flow control conical surface; 3-a lowering device; 31-a descending gas chamber; 32-descending air inlet; 33-a lowering piston; 34-a return spring; 4-slow-down device; 41-slow descending air chamber; 42-slow down piston; 43-positioning holes; 5-a hollow bolt; 51-a limit nut; 52-gas channel; 53-stomata; 6-relief valve means; 61-an overflow channel; 62-a communication hole; 63-adjusting the bolt; 64-cone valve core; 65-pressure regulating spring.

Detailed Description

The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in figure 1, the pneumatic reversing valve which realizes the slow reduction speed adjustment by utilizing the conical surface of the valve core comprises a valve body 1 provided with an oil inlet 11, an oil outlet 12 and an oil return port 13, an oil supply channel 14 communicating the oil inlet 11 and the oil outlet 12 is arranged in the valve body 1, an oil return channel 15 communicated with the oil return port 13 is arranged in the valve body 1, an overflow valve device 6 is arranged between the oil supply channel 14 and the oil return channel 15, one end of the valve body 1 is provided with a descending device 3, the other end of the valve body 1 is provided with a slow descending device 4, a valve core 2 which can axially move to control the connection or disconnection of the oil supply channel 14 and the oil return channel 15 is arranged in the valve body 1, the two ends of the valve core 2 are respectively connected with the descending device 3 and the slow descending device 4, and the outer surface of the valve core 2 is provided with a flow control conical surface 21 capable of controlling oil flow.

The valve body 1 is integrally formed, a descending device 3, a slow descending device 4 and an overflow valve device 6 are respectively arranged in the valve body, the valve core 2 is positioned between the oil supply channel 14 and the oil return channel 15 and can control the connection or disconnection of the two oil channels, and when the two oil channels are connected, a radial gap between the outer surface of the valve core 2 and the inner surface of the oil channels is a path through which an oil body passes. The outer surface of the valve core 2 is provided with the flow control conical surface 21, so that a radial gap between the outer surface of the valve core 2 and the inner surface of the oil passage is changed, and the volume of oil flowing from the oil supply channel 14 to the oil return channel 15 through the section of the flow control conical surface 21 in unit time is changed, so that the purpose of adjusting the slow-reducing speed is achieved.

The descending device 3 comprises a descending air chamber 31, a descending air inlet 32 communicated with the descending air chamber 31 is arranged on the valve body 1, a descending piston 33 is arranged in the descending air chamber 31 in a sealing and sliding mode, one end, close to the descending air chamber 31, of the valve core 2 stretches into the descending air chamber 31 to be connected with the descending piston 33, a return spring 34 is sleeved at the stretching end of the valve core 2, and two ends of the return spring 34 abut against the descending piston 33 and the valve body 1 respectively.

The slow-falling device 4 comprises a slow-falling air chamber 41, a slow-falling piston 42 is arranged in the slow-falling air chamber 41 in a sealing sliding mode, the outer end of the slow-falling air chamber 41 is located on the valve body 1, a hollow bolt 5 is installed on the valve body 1 through a limiting nut 51, and one end, close to the slow-falling device 4, of the valve core 2 is inserted into the slow-falling air chamber 41 and abutted against the slow-falling piston 42.

An air channel 52 is arranged at the axis of the hollow bolt 5, the air channel 52 is communicated from the head of the hollow bolt 5 and from an air hole 53 arranged at the side surface of the screw, and the air hole 53 is communicated with the slow descending air chamber 41.

One side of the slow-lowering piston 42 close to the hollow bolt 5 is provided with a positioning hole 43, and the hollow bolt 5 extends into the positioning hole 43.

The hollow bolt 5 is mounted on the valve body 1 through a limit nut 51, gas is controlled to pass through the gas channel 52, enter the slow-falling gas chamber 41 through the gas hole 53, push the slow-falling piston 42, drive the axial movement of the valve core 2, meanwhile, limit positions of the axial movement of the slow-falling piston 42 are limited by adjusting the screwing-in depth of the hollow bolt 5, and limit positions of the axial movement of the valve core 2 are influenced, when the valve core 2 reaches a proper position, and the slow-falling speed meets the requirement, the limit nut 51 on the outer side of the slow-falling gas chamber 41 is used for locking, so that the slow-falling speed during each slow-falling can be consistent with the speed set in advance.

The overflow valve device 6 comprises an overflow channel 61 which is arranged in the valve body 1 and communicated with the oil return channel 15, and one end of the overflow channel 61 is provided with an opening outside the valve body 1, the overflow channel 61 is communicated with the oil supply channel 14 through a communication hole 62, an adjusting bolt 63 is arranged in the overflow channel 61, a conical valve core 64 is plugged at the position of the communication hole 62, and a pressure regulating spring 65 is further arranged between the adjusting bolt 63 and the conical valve core 64.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Utilize case conical surface to realize slow descent speed adjustable gas accuse switching-over valve, including the valve body that is provided with oil inlet, oil-out and oil return opening, be provided with the intercommunication in the valve body the oil inlet with the fuel feeding passageway of oil-out, be provided with in the valve body with the oil return passageway of oil return opening intercommunication, be provided with the overflow valve device between fuel feeding passageway and the oil return passageway, the one end of valve body is provided with the descent device, the other end of valve body is provided with the device that falls its characterized in that slowly: the valve body is internally provided with a valve core which can axially move to control the connection or disconnection of the oil supply channel and the oil return channel, two ends of the valve core are respectively connected with the descending device and the slow descending device, and the outer surface of the valve core is provided with a flow control conical surface which can control the flow of oil mass.

2. The pneumatic reversing valve capable of realizing slow reduction speed adjustment by utilizing the valve core conical surface as claimed in claim 1, is characterized in that: the descending device comprises a descending air chamber, a descending air inlet communicated with the descending air chamber is formed in the valve body, a descending piston is arranged in the descending air chamber in a sealing sliding mode, one end, close to the descending air chamber, of the valve core stretches into the descending air chamber to be connected with the descending piston, a return spring is sleeved at the stretching end of the valve core, and two ends of the return spring are abutted to the descending piston and the valve body respectively.

3. The pneumatic reversing valve capable of realizing slow reduction speed adjustment by utilizing the valve core conical surface as claimed in claim 1, is characterized in that: the slow-falling device comprises a slow-falling air chamber, a slow-falling piston is arranged in the slow-falling air chamber in a sealing sliding mode, a hollow bolt is arranged at the outer end of the slow-falling air chamber and located on the valve body through a limiting nut, and one end, close to the slow-falling device, of the valve core is inserted into the slow-falling air chamber and abutted against the slow-falling piston.

4. The pneumatic reversing valve capable of realizing slow reduction speed adjustment by utilizing the valve core conical surface as claimed in claim 3, is characterized in that: and an air channel is arranged at the axis of the hollow bolt, the air channel is communicated from the head of the hollow bolt and from an air hole arranged on the side surface of the screw rod, and the air hole is communicated with the slow-falling air chamber.

5. The pneumatic reversing valve capable of realizing slow reduction and adjustable speed by utilizing the conical surface of the valve core according to claim 4, is characterized in that: one side of the slow-falling piston, which is close to the hollow bolt, is provided with a positioning hole, and the hollow bolt stretches into the positioning hole.

6. The pneumatic reversing valve capable of realizing slow reduction speed adjustment by utilizing the valve core conical surface as claimed in claim 1, is characterized in that: the overflow valve device comprises an overflow channel which is arranged in the valve body and communicated with the oil return channel, and an opening at one end of the overflow channel is arranged outside the valve body, the overflow channel is communicated with the oil supply channel through a communication hole, an adjusting bolt is arranged in the overflow channel, a conical valve core is plugged at the communication hole, and a pressure regulating spring is further arranged between the adjusting bolt and the conical valve core.