CN203477372U - Pneumatic valve - Google Patents

Abstract

The utility model provides a pneumatic valve. The pneumatic valve comprises a first valve body, a second valve body and a valve element which can do the piston motion in the first valve body. The first valve body comprises a first cylindrical body and a first sealing cover which is fixed to one end of the first cylindrical body. The second valve body comprises a second cylindrical body, a second sealing cover and a third sealing cover, wherein the second sealing cover and the third sealing cover are fixed to the two ends of the second cylindrical body respectively. A first through hole and a second through hole are formed in the first valve body. A third through hole is formed in the third sealing cover. The end, not provided with the first sealing cover, of the first valve body is connected with the second sealing cover, and a fourth through hole capable of allowing the valve element to pass through is formed in the second sealing cover. The end, close to the third sealing cover, of the valve element is provided with a boss, and an elastic part is arranged between the boss and the second sealing cover. According to the design, a cavity with the large volume is formed in the valve body, an inlet with the large aperture and an outlet with the large aperture can be formed, and therefore it is ensured that media can smoothly pass through. In addition, the pneumatic valve can be used in cooperation with an electrical switch, and the valve can be timely opened so that the media can pass through.

Description

A kind of pneumatic valve

Technical field

The utility model relates to plumbing and equipment gas transmission field, is specifically related to a kind of valve technology.

Background technique

Valve is accessory very common in daily life and various device, is controlling passing through and blocking of medium.Existing valve is varied, such as: gate valve, throttle valve, ball valve, butterfly valve, membrane valve, plunger valve, stopcock etc.Than the most traditional valve, the switching of the electrical equipment control valve that a lot of valves of today have been equipped with.But, using the exhaust outlet field with certain pressure at picture compressor, gas holder, dryer etc., the valve of existing these electrical controls, can not be too much by channels designs due to the restriction of working principle, thereby can not make medium pass through swimmingly.

Model utility content

The purpose of this utility model is to provide a kind of pneumatic valve, solves one or more in above-mentioned prior art problem.

According to an aspect of the present utility model, a kind of pneumatic valve is provided, comprise the first valve body, the second valve body and can in the first valve body, do the spool of piston movement; The first valve body comprises the first cylinder and first capping of being fixed on its one end; The second valve body comprises the second cylinder and is individually fixed in the second capping, the 3rd capping at its two ends; On the first valve body, offer the first through hole and the second through hole; In the 3rd capping, have third through-hole; One end that the first valve body is not established the first capping is connected with the second capping, offers the fourth hole that can make spool pass through in the second capping; Spool is provided with boss near one end of the 3rd capping, between boss and the second capping, is provided with elastic member.This design, because its valve inner possesses the cavity of larger volume, can be offered import and outlet that bore is larger, and then guarantees that medium can pass through very swimmingly.In addition, the utility model can be used in conjunction with electrical switch, can realize regularly open valve clearance medium.

In some embodiments, elastic member is spring, spring one end and boss butt, the other end and the second capping butt.Elastic member adopts spring, is convenient to draw materials, is convenient to install, change.

In some embodiments, elastic member comprises that homopolarity is oppositely arranged the first magnet and the second magnet, and the first magnet is located at a side relative with boss in the second capping, and the second magnet is located at a side relative with the second capping on boss.This design is compared to adopting spring, can avoid spring in using process because humid environment gets rusty, extend the working life of valve.

In some embodiments, boss circumferentially contacts with the inside of the second cylinder and can in the second cylinder, do piston movement.This design can make boss edge and the second cylinder inwall close contact, thereby when Open valve, can make full use of the gas pressure of external air source, guarantees the controllability of valve opening process, and power also avoids waste.

In some embodiments, boss is circumferentially with the second seal.This design has improved boss edge and the tightness degree that the second cylinder inwall contacts, and further guarantees that spool is an airtight space near one end of the 3rd capping and the second cylinder and the 3rd capping.

In some embodiments, in the first valve body, be provided with the first seal.Guarantee spool and the first cylinder inwall close contact as much as possible, and then guarantee that spool cuts off the connection of the first through hole and the second through hole completely, realizes closing completely of valve.Meanwhile, avoid medium to enter the second valve body internal corrosion elastic member by the gap between spool and the first cylinder.

Accompanying drawing explanation

Fig. 1 is the generalized section of the first mode of execution opening state of the present utility model;

Fig. 2 is the generalized section of the second mode of execution opening state of the present utility model;

Fig. 3 is the generalized section of the third mode of execution opening state of the present utility model;

Fig. 4 is the generalized section of the 4th kind of mode of execution opening state of the present utility model;

Fig. 5 is the generalized section of the first mode of execution closed condition of the present utility model.

Embodiment

Below in conjunction with Figure of description, the utility model is described in more detail.

As shown in Figure 1, a kind of pneumatic valve that the utility model provides, comprises the first valve body 10, the second valve body 20 and can in the first valve body, do the spool 31 of piston movement; Wherein, the first valve body 10 comprises the first cylinder 12 and first capping 11 of being fixed on its one end; The second valve body 20 comprises the second cylinder 21 and is individually fixed in the second capping 22, the 3rd capping 23 at its two ends.The means of fixation of aforementioned capping and cylinder all can have multiple, both can be one-body molded, also can be welded and fixed, can also screw thread be set in the end of cylinder, the screw thread that the screw thread of cover rim setting and cylinder end matches, the end of cylinder is fixed on respectively in capping and capping by screw thread rotation, also can connect by the wheel of the law.On the first valve body 10, offer the first through hole 13 and the second through hole 14.In actual use, in the first through hole 13 and the second through hole 14, one is the entrance of medium, and one is the outlet of medium.Also can there be various ways the position that the first through hole 13 and the second through hole 14 are offered, can as shown in Figure 1, be both that two through holes are all opened in the first cylinder 12; Also can be that two through holes are all opened in the first capping 11; Can also be that a through hole is opened in the first cylinder 12 as shown in Figure 3, another be opened in the first capping 11.

In the 3rd capping 23, have third through-hole 231.Third through-hole 231 is connected with external air source.

One end that the first valve body 10 is not established the first capping 11 is connected with the second capping 22, in the second capping 22, offers the fourth hole that can make spool 31 pass through.The first valve body 10 and the second capping 22 Placements can be one-body molded, can be to be also welded and fixed, and can be also that the modes such as screw thread is tightened are fixed.Fourth hole herein makes the first valve body 10 and the inner cavity that forms a perforation of the second valve body 20, and can pass for spool 31.Spool 31 circumferentially contacts also portion within it and does piston movement with the inside of the first cylinder 12.

Spool 31 is provided with boss 32 near one end of the 3rd capping 23 by modes such as one-body molded or welding, and one of its effect is secures resilient member.Boss 32 can be a plurality of independent component distribution in the end of spool 31, boss 32 can also be an integral body.Between boss 32 and the second capping 22, be provided with elastic member, the elastic member here can have multiple design.

Elastic member is spring 41.As shown in Fig. 1,3,5, spring 41 integral body are set in spool 31 outsides, and its one end props up the second capping 22, and the other end props up boss 32.As shown in Figure 2, elastic member is a plurality of springs that around distribute around spool 31, and one end of a plurality of springs 41 all props up the second capping 22, and the other end of a plurality of springs 41 all props up boss 32.

As shown in Figure 4, elastic member can also be the magnet that a pair of homopolarity is oppositely arranged, by the first magnet 43 and the second magnet 42, formed, the first magnet 43 and the second magnet 42 are oppositely arranged, and relative face is homopolarity, the first magnet 43 is fixed on a side relative with boss 32 in the second capping 22 by the mode such as pasting or inlay, and the second magnet 42 is fixed on a side relative with the second capping 22 on boss 32 by the mode such as pasting or inlay.

As shown in Figures 1 to 4, a kind of pneumatic valve described in the utility model is in off position time, and elastic member is in compressive state, now, the connection that cuts off the first through hole 13 and the second through hole 14 completely of spool 31, medium can not lead to the second through hole 14 from the first through hole 13.

As shown in Figure 5, a kind of pneumatic valve described in the utility model is under opening state, and in the raw, now, spool 31, between the first through hole 13 and the second through hole 14, can not cut off the connection of the first through hole 13 and the second through hole 14 to elastic member.

In process from closed condition to opening state, spool 31 moves in the first valve body 10 and the common cavity forming of the second valve body 20.The described a kind of pneumatic valve of the utility model, coordinates electrical switch to use together, and electrical switch is controlled external air source to the frequency of third through-hole 231 gas transmissions.When elastic member in the raw, tracheae is during to third through-hole 231 gas transmission, valve is in opening state.When electrical switch is controlled to third through-hole 231 gas transmission, by third through-hole 231, to spool 31, the end, one end near the 3rd capping 23 presses gas, the stressed direction to the first capping 11 of spool 31 is slided, and then spool 31 is moved between the first through hole 13 and the second through hole 14 gradually, and cut off gradually the connection of the first through hole 13 and the second through hole 14.In this process, elastic member is compressed gradually.When spool 31 cuts off the first through hole 13 and the second through hole 14 completely, a kind of pneumatic valve is in closed condition.In this process, because the first capping 11, spool 31 and the first cylinder 12 have formed an airtight space, if while there is air in this airtight space, when gas push spool 31 can be subject to the impact of the air pressure in this confined space when the direction of the first capping 11 moves, thereby cause spool 31 to move to the first capping 11 directions.Therefore, can in the first capping 11, offer penetrating relief opening.When spool 31 slides to the direction of the first capping 11, the gas in this confined space is discharged from relief opening, thereby has guaranteed closing smoothly of valve.

When electrical switch sends instruction Open valve, stop to third through-hole 231 gas transmissions.Under the thrust that spool 31 resets at elastic member, start to slide to the direction of the 3rd capping 23.Until spool 31 removes completely between the first through hole 13 and the second through hole 14, valve opening.

In view of the utility model is to rely on spool 31 and the inwall close contact of the first cylinder 12 to realize to cut off being communicated with between the first through hole 13 and the second through hole 14, only guaranteed spool and the first cylinder 12 inwall close contacts, guarantee valve is realized and being closed completely.Therefore, on the first valve body 10 inwalls, be covered with the first seal 91.

In addition, when throttle down, be to rely on the pressure of gas to drive spool 31 to move to the first capping 11 directions.Therefore, spool 31 should be the airtight space of trying one's best near one end of the 3rd capping 23 and the space of the second cylinder 21 and the 3rd capping 23 common formations.Therefore, should guarantee that the gap between boss 32 and the second cylinder 21 inwalls should be as much as possible little.To this, boss 32 should be designed to as a wholely, and its circumferential edge contacts with the inwall of the second cylinder 21.Can also circumferentially fix at the edge of boss 32 circle second seal 92.

More than statement is only optimal way of the present utility model; it should be pointed out that to those skilled in the art, do not departing under the prerequisite of the utility model creation design; can also make some distortion and improvement, within these also should be considered as protection domain of the present utility model.

Claims (6)

1. a pneumatic valve, is characterized in that, comprises the first valve body (10), the second valve body (20) and can in the first valve body (10), do the spool (31) of piston movement; Described the first valve body (10) comprises the first cylinder (12) and is fixed on first capping (11) of its one end; Described the second valve body (20) comprises the second cylinder (21) and is individually fixed in second capping (22) at its two ends, the 3rd capping (23);

On described the first valve body (10), offer the first through hole (13) and the second through hole (14);

In described the 3rd capping (23), have third through-hole (231);

One end that described the first valve body (10) is not established described the first capping (11) is connected with described the second capping (22), offers the fourth hole that can make spool (31) pass through in described the second capping (22);

Described spool (31) is provided with boss (32) near one end of described the 3rd capping (23), between described boss (32) and described the second capping (22), is provided with elastic member.

2. a kind of pneumatic valve according to claim 1, is characterized in that, described elastic member is spring (41), described spring (41) one end and described boss (32) butt, the other end and described the second capping (22) butt.

3. a kind of pneumatic valve according to claim 1, it is characterized in that, described elastic member comprises that homopolarity is oppositely arranged the first magnet (43) and the second magnet (42), described the first magnet (43) is located at the upper side relative with described boss (32) of described the second capping (22), and described the second magnet (42) is located at the upper side relative with described the second capping (22) of described boss (32).

4. a kind of pneumatic valve according to claim 1, is characterized in that, described boss (32) circumferentially contacts with the inside of described the second cylinder (21) and can in the second cylinder (21), do piston movement.

5. a kind of pneumatic valve according to claim 4, is characterized in that, described boss (32) is circumferentially with the second seal (92).

6. according to a kind of pneumatic valve described in claim 1 to 5 any one, it is characterized in that, in described the first valve body (10), be provided with the first seal (91).

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