CN201582454U

CN201582454U - Check valve

Info

Publication number: CN201582454U
Application number: CN200920294565XU
Authority: CN
Inventors: 王靖聪; 陈贤良; 王燊; 王爵义; 王靖锋
Original assignee: Zhejiang Zhenghua Valve Factory
Current assignee: Zhejiang Zhenghua Valve Factory
Priority date: 2009-12-17
Filing date: 2009-12-17
Publication date: 2010-09-15
Anticipated expiration: 2019-12-17

Abstract

The utility model relates to a check valve. The check valve provides the technical scheme that the check valve comprises a valve body, a valve bonnet and a valve spool arranged in the valve body, wherein a medium feeding channel, a medium discharging channel and a connecting channel for leading the medium feeding channel to be communicated with the medium discharging channel are arranged on the valve body, the valve spool is arranged on the connecting channel and is matched with a valve holder between the connecting channel and the medium feeding channel to form communication or close between the medium feeding channel and the connecting channel, a resisting spring is arranged between the valve body and the valve bonnet, a packing washer is arranged on the end surface of the valve spool facing to the valve holder, the middle portion of the packing washer is arranged to be hollow, and a sealing gasket matched with the packing washer on the end surface of the valve spool is arranged on the valve holder. The utility model provides a check valve with excellent sealing performance and simple structure through adopting the technical scheme.

Description

Safety check

Technical field

The utility model relates to a kind of safety check.

Background technique

At present, safety check on market and the data is mainly by valve body, valve gap and the spool of being located in the valve body constitute, valve body is provided with the medium inlet passage, the connecting passage of medium flow pass and formation medium inlet passage and the conducting of medium flow pass, spool places the connecting passage place, and cooperate with valve seat between the medium inlet passage with connecting passage, constitute the conducting of medium inlet passage and connecting passage or close, be provided with between valve body and the valve gap and compress spring, when the medium feed pressure in the medium inlet passage during greater than spring force, spool then can break away from sealing with valve seat, makes medium inlet passage and the conducting of medium flow pass; Because the medium in the medium flow pass can't be exerted pressure to spool,, form the non-return of medium so the medium in the medium flow pass can't flow backward in the medium inlet passage.

Sealing in this type of safety check between spool and the valve seat is very important, usually is arranged with seal ring on spool and the end face that valve seat contact, owing to there is friction between spool and the valve seat, ring wear is very fast, and replacing brings inconvenience to operation often; And passage need be provided with some mechanisms that it moves that stablize between spool and the valve gap, guarantees the stability of spool work with this, and parts are more in this type of mechanism, and structure is comparatively complicated, causes valve volume to become big.

Summary of the invention

At the deficiency that prior art exists, the utility model provides a kind of good airproof performance, safety check simple in structure.

For achieving the above object, the utility model provides following technological scheme: a kind of safety check, include valve body, valve gap and be located at spool in the valve body, described valve body is provided with the medium inlet passage, the connecting passage of medium flow pass and formation medium inlet passage and the conducting of medium flow pass, spool places the connecting passage place, and cooperate with valve seat between the medium inlet passage with connecting passage, constitute the conducting of medium inlet passage and connecting passage or close, be provided with between valve body and the valve gap and compress spring, described spool is provided with sealing gasket towards the end face of valve seat, sealing pad middle part is the hollow out setting, described valve seat be provided with spool end on the adaptive gasket seal of sealing gasket.

Adopt technique scheme,, effectively prevent the wearing and tearing of sealing mechanism when spool and valve seat operate, reduced the replacing frequency, made things convenient for operation by on the end face of valve seat and valve seat, corresponding sealing gasket and gasket seal being set respectively at spool.

Wherein, on the spool on sealing gasket and the valve seat inner peripheral surface of gasket seal cross section and outer circumferential face be inclined to set respectively.It is for better sealing that the inner peripheral surface of sealing gasket and gasket seal cross section and outer circumferential face are inclined to set on the one hand respectively, then is to cause damage in order to prevent medium from it is impacted on the other hand.

The utility model further is set to: the setting sleeve that is provided with extension on valve gap and the end face that valve body is connected towards the valve body connecting passage, be provided with placed cavity in this setting sleeve, describedly compress spring and spool be connected an end relatively with valve base sealing the other end and be in the placed cavity of setting sleeve, and compress an end of spring and the top end of setting sleeve placed cavity and conflict, the other end and spool are conflicted.

Adopt technique scheme, be provided with so simple in structure, convenient processing and installing.

The utility model further is set to: be provided with the guide sleeve adaptive with spool between the placed cavity of setting sleeve and the spool, this guide sleeve is with setting sleeve fixedlys connected.

Adopt technique scheme, being provided with of guide sleeve on the one hand is stability in order to keep spool to move, then be in order to cause the wearing and tearing of valve gap setting sleeve between the setting sleeve that prevents spool and valve gap through rubbing for a long time on the other hand, it is lower slightly compared with changing the required cost of production of valve gap to change guide sleeve, has saved replacement cost so be provided with like this.

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

Description of drawings

Fig. 1 is the utility model embodiment's a structural representation;

Fig. 2 is the I portion enlarged view of Fig. 1.

Embodiment

As Fig. 1, a kind of safety check shown in Figure 2, include valve body 1, valve gap 2 and be located at spool 3 in the valve body 1, valve body 1 is provided with medium inlet passage 11, the connecting passage 13 of medium flow pass 12 and formation

medium inlet passage

11 and 12 conductings of medium flow pass, spool 3 places connecting passage 13 places, and cooperate with valve seat 14 between the medium inlet passage 11 with connecting passage 13, constitute the conducting of medium inlet passage 11 and connecting passage 13 or close, be provided with between valve body 1 and the valve gap 2 and compress spring 4, valve seat 14 can be wholely set with valve body 1, but equally also split setting all is feasible; Spool 3 is provided with sealing gasket 31 towards the end face of valve seat 14, and sealing pad 31 middle parts are the hollow out setting, described valve seat 14 be provided with spool 3 end faces on the adaptive gasket seal 141 of sealing gasket 31.At spool 3 corresponding sealing gasket 31 and gasket seal 141 are set respectively on the end face of valve seat 14 and valve seat 14, the wearing and tearing of sealing mechanism have reduced the replacing frequency when effectively preventing spool 3 with valve seat 14 runnings, have made things convenient for operation.

In the utility model embodiment, on the spool 3 on sealing gasket 31 and the valve seat 14 inner peripheral surface and the outer circumferential face of gasket seal 141 cross sections be inclined to set respectively; Being obliquely installed on the one hand is for better sealing, then is to cause damage in order to prevent medium from it is impacted on the other hand.Be provided with the setting sleeve 21 of extension on valve gap 2 and the end face that valve body 1 is connected towards valve body 1 connecting passage 13, be provided with placed cavity 22 in this setting sleeve 21, compress spring 4 and spool 3 relatively and the be tightly connected the other end of an end of valve seat 14 be in the placed cavity 22 of setting sleeve 21, and compress an end of spring 4 and the top end 221 of setting sleeve 21 placed cavities 22 and conflict, the other end and spool 3 are conflicted.Be provided with the guide sleeve 23 adaptive with spool 3 between the placed cavity 22 of setting sleeve 21 and the spool 3, this guide sleeve 23 is with setting sleeve 21 fixedlys connected.Being provided with of guide sleeve 23 on the one hand is stability in order to keep spool 3 to move, then be in order to cause the wearing and tearing of valve gap 2 setting sleeves 21 between the setting sleeve 21 that prevents spool 3 and valve gap 2 through rubbing for a long time on the other hand, it is lower slightly compared with changing the required cost of production of valve gap 2 to change guide sleeve 23, is provided with like this and has saved replacement cost.

Claims

1. safety check, include valve body, valve gap and be located at spool in the valve body, described valve body is provided with the medium inlet passage, the connecting passage of medium flow pass and formation medium inlet passage and the conducting of medium flow pass, spool places the connecting passage place, and cooperate with valve seat between the medium inlet passage with connecting passage, constitute the conducting of medium inlet passage and connecting passage or close, be provided with between valve body and the valve gap and compress spring, it is characterized in that: described spool is provided with sealing gasket towards the end face of valve seat, sealing pad middle part is the hollow out setting, described valve seat be provided with spool end on the adaptive gasket seal of sealing gasket.

2. safety check according to claim 1 is characterized in that: on the described spool on sealing gasket and the valve seat inner peripheral surface of gasket seal cross section and outer circumferential face be inclined to set respectively.

3. safety check according to claim 1, it is characterized in that: the setting sleeve that is provided with extension on described valve gap and the end face that valve body is connected towards the valve body connecting passage, be provided with placed cavity in this setting sleeve, describedly compress spring and spool be connected an end relatively with valve base sealing the other end and be in the placed cavity of setting sleeve, and compress an end of spring and the top end of setting sleeve placed cavity and conflict, the other end and spool are conflicted.

4. safety check according to claim 3 is characterized in that: be provided with the guide sleeve adaptive with spool between the placed cavity of described setting sleeve and the spool, this guide sleeve is with setting sleeve fixedlys connected.