CN203477371U

CN203477371U - Pneumatic valve

Info

Publication number: CN203477371U
Application number: CN201320587492.XU
Authority: CN
Inventors: 干平; 曾培
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-23
Filing date: 2013-09-23
Publication date: 2014-03-12
Anticipated expiration: 2023-09-23

Abstract

The utility model provides a pneumatic valve. The pneumatic valve comprises a first valve body, a second valve body and a valve element, wherein the first valve body is composed of a first barrel-shaped body and a first sealing cover fixed to one end of the first barrel-shaped body, the second valve body is composed of a second sealing cover and a third sealing cover which are fixed to the two ends of a second barrel-shaped body respectively and the second barrel-shaped body, and the valve element can do piston motion in the first valve body. 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. A fourth through hole which the valve element can pass through is formed in the second sealing cover. A boss capable of doing piston motion in the second barrel-shaped body is arranged at the end, close to the third sealing cover, of the valve element. A fifth through hole is formed the portion, located on the first valve body and the boss, of the second valve body. Because a large cavity is formed in the valve bodies, an inlet with a large caliber and an outlet with a large caliber can be formed, and accordingly media can successfully pass. Furthermore, the pneumatic valve can be used in cooperation with an electrical switch so that the valve can be regularly opened to release the media.

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 and can in the second cylinder, does the boss of piston movement near one end of the 3rd capping; The part that second valve body is positioned at the first valve body and boss is provided with fifth hole.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, 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 valve 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 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 flange.

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 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, 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 also be 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.The edge of boss 32 circumferentially contacts with the inwall of the second cylinder 21, and the second valve body 20 inside are divided into two confined spaces.One is the first confined space 201 consisting of the second capping 22, the second cylinder 21, spool 31 and boss 32; One is the second confined space 202 consisting of the 3rd capping 23, the second cylinder 21 and boss 32.On the second valve body 20, have and can to the first confined space 201, inject the fifth hole 211 of air, in order to achieve this end, fifth hole 211 can as shown in Figure 1, be opened in the position between the second capping 22 and boss 32 in the second cylinder 21; Also can as shown in Figure 2, be opened in the second capping 22.

As shown in Figure 1, 2, a kind of pneumatic valve described in the utility model is in off position time, the connection that cuts off the first through hole 13 and the second through hole 14 completely of spool 31, and medium can not lead to the second through hole 14 from the first through hole 13.

As shown in Figure 3, a kind of pneumatic valve described in the utility model is under opening state, and 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.

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 respectively external air source and passed through third through-hole 231 to the interior gas transmission of the second confined space 202 and pass through fifth hole 211 to the interior gas transmission of the first confined space 201.

While needing Open valve, external air source is not to third through-hole 231 gas transmissions, and electrical switch indication external air source is by fifth hole 211 to the interior gas transmission of the first confined space 201, and the gas pressure in the first confined space 201 constantly raises.When the air pressure in the first confined space 201 is greater than the air pressure in the second confined space 202, boss 32 pressurized band movable valve plugs 31 move to the 3rd capping 23 directions, spool 31 is removed gradually between the first through hole 13 and the second through hole 14, progressively realize the connection of the first through hole 13 and the second through hole 14, realize the unlatching of valve.

While needing throttle down, external air source is not to fifth hole 211 gas transmissions, and electrical switch indication external air source is by third through-hole 231 to the interior gas transmission of the second confined space 202, and the gas pressure in the second confined space 202 constantly raises.When the air pressure in the second confined space 202 is greater than the air pressure in the first confined space 201, boss 32 pressurizeds promote spool 31 and move to the first capping 11 directions, spool 31 moves between the first through hole 13 and the second through hole 14 gradually, progressively cut off the connection of the first through hole 13 and the second through hole 14, realize closing of valve.

In addition, in the opening process of valve, if there is air in the second confined space 202, gas pressure in the first confined space 201 promotes boss 32 can be subject to the impact of the air pressure in this confined space when the direction of the 3rd capping 23 moves, thereby causes spool 31 to move to the 3rd capping 23 directions.Therefore, can in the 3rd capping 23, offer penetrating relief opening.When spool 31 slides to the direction of the 3rd capping 23, the gas in this confined space is discharged from relief opening, thereby has guaranteed the smooth unlatching of valve.Same, in the closing process of valve, if the interior air that exists of the first confined space 201 can hinder boss 32 to the movement of the first capping 11 directions, therefore can in the second capping 22, offer penetrating relief 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, in the opening and closing of valve, be all to rely on the pressure of gas to drive spool 31 to move.Therefore, should improve the airtight degree of the first confined space 201 and the second confined space 202 as far as possible.In other words, should guarantee that the gap between boss 32 and the second cylinder 21 inwalls should be as much as possible little.To this, can 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

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 near one end of described the 3rd capping (23) the boss (32) that can do piston movement in described the second cylinder (21); The part that described the second valve body (20) is positioned at described the first valve body (10) and described boss (32) is provided with fifth hole (211).

2. a kind of pneumatic valve according to claim 1, is characterized in that, described boss (32) is circumferentially with the second seal (92).

3. a kind of pneumatic valve according to claim 1, is characterized in that, is provided with the first seal (91) in described the first valve body (10).