CN204284530U - Two-position five-way double gas control valve - Google Patents

Abstract

The two-position five-way double air control valve disclosed by the utility model includes a valve body, a valve cavity is arranged in the valve body, a valve stem is movable in the valve cavity, and a first row connected with the valve cavity is respectively arranged on the valve body. The air port, the first air outlet, the air inlet, the second air outlet and the second exhaust port, the valve stem is provided with a number of flat rings, the two ends of the valve body are respectively provided with air control covers, each air control The covers are provided with control air holes, and the two air control covers are respectively provided with pistons that are in contact with the valve stem. The pistons are provided with accommodating grooves, and the accommodating grooves are provided with buffers corresponding to the corresponding air control covers. body, a spring is provided between the buffer body and the corresponding piston, and a guide belt and a sealing ring are provided between each piston and the corresponding air control cover. The utility model has the advantages of simple and reasonable structure, convenient control, high sensitivity, long service life, more stable action and stable working performance.

Description

Two-position five-way double air control valve

technical field

The utility model relates to the technical field of valves, in particular to a two-position five-way double air control valve.

Background technique

Valve products are widely used in fluid control in various technical fields, and two-position five-way valve is one of them, which is well known by people. The two-position five-way valve can be divided into three types: manual type, electromagnetic type and air control type according to different structures. The authorized announcement number is CN202972016U, which discloses "a kind of air-controlled two-position five-way valve". There is a valve stem, and the valve body is provided with a first exhaust port, a first air outlet, an air inlet, a second air outlet, and a second exhaust port communicating with the valve cavity at equal distances from left to right. A number of flat rings are arranged in sealing fit with the inner wall of the valve, a compression spring is arranged between the back cover and the valve stem, a piston is arranged between the air control cover and the valve stem, and a control air hole is arranged on the air control cover. Its working principle is to fill the control air hole with compressed gas, use the piston to drive the valve stem to drive the flat ring to move, and then achieve the effect of changing the gas passage, and when the control air hole is stopped, use the compression spring to drive the valve stem to reset, so that Return to the original state. However, the above-mentioned "a kind of air-controlled two-position five-way valve" has the following defects: first, since there is only one control air hole, it needs to be reset by means of a compression spring when it works, and the compression spring will lead to elasticity after frequent compression. reduce the sensitivity of the valve stem action, which affects the normal operation of the valve; secondly, in order to ensure the tightness, the above-mentioned two-position five-way valve is also equipped with a sealing ring on the piston outer jacket. However, when the air pressure in the control air hole is unstable , it will cause one-way and one-sided pressure on the sealing ring, which will affect the service life of the sealing ring; third, when the air is stopped in the control air hole, the valve stem will drive the piston to move synchronously under the action of the compression spring, so that Impact between the piston and the air control cover results in a short piston life.

Utility model content

The purpose of this utility model is to aim at the defects and deficiencies of the prior art, and provide a two-position five-way double air control system with simple and reasonable structure, convenient control, high sensitivity, long service life, more stable action and stable working performance. valve.

In order to achieve the above object, the utility model adopts the following technical solutions:

The two-position five-way double air control valve described in the utility model includes a valve body, a valve cavity is arranged in the valve body, a valve stem is movable in the valve cavity, and the valve body is equidistant from left to right. A first exhaust port, a first air outlet, an air inlet, a second air outlet, and a second exhaust port communicated with the valve cavity are provided, and a plurality of valve stems are provided on the valve stem to seal with the inner wall of the valve. The two ends of the valve body are respectively provided with an air control cover, each of the air control covers is provided with a control air hole, and the two air control covers are respectively provided with A matching piston, the piston is provided with an accommodating groove, the accommodating groove is provided with a buffer body corresponding to the corresponding air control cover, and a spring is arranged between the buffer body and the corresponding piston, A guide belt and a sealing ring are arranged between each of the pistons and the corresponding air control cover.

Further, the sealing ring is set as a "Y" ring.

Further, the piston is provided with a limit ring that cooperates with the corresponding buffer body.

The beneficial effects of the utility model are as follows: by setting air control covers at both ends of the valve body, and respectively setting pistons in the two air control covers to offset and cooperate with the valve stem, both air control covers are provided with control air holes, and the working When inflating different control air holes, the valve stem can be driven to move synchronously through the corresponding piston, and then the effect of changing the gas passage in the valve body is achieved, and the control is convenient. Compared with the prior art, the utility model adopts pneumatic The method directly controls the reciprocating movement of the valve stem, so that the sensitivity of the valve stem is higher when it moves, which ensures that the utility model can work normally in various environments and has a longer service life; A buffer body is set in the accommodation tank to cooperate with the corresponding air control cover. When the valve stem is pushed by the piston on one side to drive the piston on the other side to move, the buffer body effectively prevents the piston from directly contacting the air control cover. Collision, the piston is effectively protected, and, compared with directly setting the anti-collision pad on the piston, the utility model adopts the cushion pad and the spring to cooperate, the softness is higher, and the cushioning and shock absorption effect is better; The guide belt is set between the control covers, on the one hand, it effectively avoids the phenomenon of one-way and one-sided pressure on the sealing ring, prolonging the service life of the sealing ring, and on the other hand, it also increases the guidance of the piston movement, making the piston movement easier smooth.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

In Figure 1:

1. Valve body; 11. First exhaust port; 12. First air outlet; 13. Air inlet; 14. Second air outlet; 15. Second exhaust port; 2. Valve cavity; 3. Valve stem ; 31, flat ring; 4, air control cover; 41, control air hole; 5, piston; 51, accommodating groove; 6, buffer body; 7, spring; circlip.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

The two-position five-way dual air control valve shown in Figure 1 includes a valve body 1, a valve chamber 2 is arranged in the valve body 1, a valve stem 3 is movable in the valve chamber 2, and the valve body 1 is arranged in sequence from left to right. The first air outlet 11, the first air outlet 12, the air inlet 13, the second air outlet 14, and the second air outlet 15 communicating with the valve cavity 2 are arranged at a distance. 1 flat ring 31 with inner wall sealing fit.

The two ends of the valve body 1 are respectively provided with air control covers 4, and each air control cover 4 is provided with a control air hole 41, and the two air control covers 4 are respectively provided with a piston 5 that is offset and matched with the valve stem 3. , by inflating different control air holes 41 respectively, the corresponding piston 5 can drive the valve stem 3 to move synchronously, thereby changing the gas passage in the valve body 1, and the control is convenient. Compared with the prior art, this The utility model adopts a pneumatic method to directly control the reciprocating movement of the valve stem 3, so that the sensitivity of the valve stem is higher when it moves, which ensures that the utility model can work normally in various environments and has a longer service life.

The piston 5 is provided with an accommodating groove 51 , and the accommodating groove 51 is provided with a buffer body 6 corresponding to the corresponding air control cover 4 , and a spring 7 is arranged between the buffer body 6 and the corresponding piston 5 . When the valve stem 3 is driven by the piston 5 on one side to move the piston 5 on the other side, the buffer body 6 effectively prevents the piston 5 from directly colliding with the air control cover 4, effectively protecting the piston 5 , and, compared with directly setting the anti-collision pad on the piston 5, the utility model adopts the cushion pad to cooperate with the spring 7, which has higher softness and better cushioning effect.

A guide belt 8 and a sealing ring 9 are provided between each piston 5 and the corresponding air control cover 4. By setting the guide belt 8, on the one hand, the phenomenon of one-way and one-sided pressure on the sealing ring 9 is effectively avoided, and the sealing ring is extended. 9, on the other hand also increases the guiding when the piston 5 moves, making the movement of the piston 5 more stable.

The working principle of the utility model is: as shown in Figure 1, when the left control air hole 41 is filled with compressed gas, and when there is no compressed gas in the right control air hole 41, the piston 5 in the left air control cover 4 drives The valve stem 3 moves to the right. At this time, the air inlet 13 is connected to the first air outlet 12, the second air outlet 14 is connected to the second air outlet 15, and the first air outlet 11 is closed. state; when filling compressed gas into the right side control air hole 41, and stop charging compressed gas into the left side control air hole 41, the piston 5 in the right side air control cover 4 drives the valve stem 3 to move to the left, at this time The air inlet 13 and the second air outlet 14 are connected, the first air outlet 11 and the first air outlet 12 are connected, and the second air outlet 15 is closed.

As a preferred embodiment, the sealing ring 9 is set as a "Y" ring, which effectively reduces the friction force during operation while increasing the sealing performance, so that the piston 5 runs more smoothly and avoids the pressure of the piston 5 when the air pressure is not stable. Damage to the sealing ring 9. The piston 5 is provided with a limit jumper 10 that cooperates with the corresponding buffer body 6. The function of the limit jumper 10 is to prevent the buffer body 6 from popping out of the accommodating groove 51 under the elastic force of the spring 7, effectively ensuring the safety of the utility model. normal work.

The above is only a preferred embodiment of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application scope are all included in the utility model patent application scope .

Claims (3)

1. Two-position five-way double air control valve, including a valve body, a valve cavity is set in the valve body, a valve stem is movable in the valve cavity, and the valve body is equidistant from left to right. The first exhaust port, the first air outlet, the air inlet, the second air outlet and the second exhaust port connected to the valve cavity, and the valve stem is provided with a number of flat rings that are sealingly matched with the inner wall of the valve , it is characterized in that: the two ends of the valve body are respectively provided with an air control cover, each of the air control covers is provided with a control air hole, and the two air control covers are respectively provided with A matching piston, the piston is provided with an accommodating groove, the accommodating groove is provided with a buffer body corresponding to the corresponding air control cover, and a spring is arranged between the buffer body and the corresponding piston, A guide belt and a sealing ring are arranged between each of the pistons and the corresponding air control cover. 2. The two-position five-way dual air control valve according to claim 1, wherein the sealing ring is set as a "Y" ring. 3. The two-position five-way dual air control valve according to claim 1, characterized in that: the piston is provided with a limit ring that cooperates with the corresponding buffer body.