CN201090794Y - Back valve - Google Patents

Back valve Download PDF

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Publication number
CN201090794Y
CN201090794Y CNU2007200706617U CN200720070661U CN201090794Y CN 201090794 Y CN201090794 Y CN 201090794Y CN U2007200706617 U CNU2007200706617 U CN U2007200706617U CN 200720070661 U CN200720070661 U CN 200720070661U CN 201090794 Y CN201090794 Y CN 201090794Y
Authority
CN
China
Prior art keywords
valve
spool
valve seat
bottom
provided
Prior art date
Application number
CNU2007200706617U
Other languages
Chinese (zh)
Inventor
汤琪
Original Assignee
汤琪
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 汤琪 filed Critical 汤琪
Priority to CNU2007200706617U priority Critical patent/CN201090794Y/en
Application granted granted Critical
Publication of CN201090794Y publication Critical patent/CN201090794Y/en

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Abstract

A check valve of the utility model relates to a fluid check valve and can be widely applied to the downstream outlet part which prevents the back flow of the fluid. The check valve comprises a valve body, a valve base and a vale core; wherein, a stepped inner cavity is arranged in the valve body; the valve base is clamped and fixed in the stepped inner cavity of the valve body; the valve core is threaded through the through hole of the valve base; a convex ring which limits the stroke of the valve core is arranged on the bottom of the valve core and is supported on the bottom of the valve base; a support rib is arranged on the valve core to form a diversion cavity; the valve core is sealed with the valve base through a seal ring. The check valve has the advantages of simple structure, low production cost, good back flow prevention effect and lowered positive pressure. The utility model can be widely applied to the downstream outlet part which prevents the back flow of the fluid such as the tap water channel and can effectively avoid the back flow of water from polluting the upstream.

Description

Safety check

Technical field

The utility model safety check relates to a kind of fluid one-way valve.Can be widely used in preventing the lower exit part of fluid reflux.

Technical background

Safety check is a kind of in a kind of Fluid valve, and it allows fluid along the pipeline one-way flow, when the fluid reverse flow, and valve closing.Generally comprise valve body, spool and valve seat.The valve arrangement difference, its manufacture cost difference, difference falls in positive pressure.

Summary of the invention

The purpose of this utility model is to provide a kind of safety check simple in structure, easy to manufacture.

The technical problems to be solved in the utility model is to guarantee that safety check has little positive pressure to fall under the valve arrangement preceding topic simple, easy to manufacture.

The scheme that solves the utility model technical problem is: a kind of safety check, comprise valve body, valve seat and spool, and wherein, a valve body is provided with the cascade inner chamber; One valve seat is fixed on valve body cascade inner chamber place; One spool passes valve seat through-hole, and the bulge loop and the valve seat bottom of the restricted spool stroke in spool bottom are replaced, and spool is provided with supporting rib and forms diversion cavity, and spool is by seal ring and valve base sealing.Its working principle is: the ladder inner chamber of valve body is provided with, and makes entry young, and water outlet is big, and when valve open, bulge loop is replaced by the valve seat bottom, and fluid flows out fast along diversion cavity, and positive pressure is fallen little; Work as hypotension, when safety check was closed, spool cooperated with valve base sealing.

On the such scheme basis, described valve seat top is provided with circle along the through hole recessed, further enlarged water outlet, makes liquid stream more unobstructed.

On the such scheme basis, sealing configuration of the present utility model is: seal ring is located at the scrobicular ring place on spool top.

Valve arrangement of the present utility model also can be following structure, and the bottom of described spool bulge loop is provided with the tapering, and with the frustum coupling of body cavity, bulge loop upper edge supporting rib is provided with protruding rank, and during conducting, the valve seat bottom is replaced on protruding rank, and fluid flows out along diversion cavity.

The tapering of described spool bottom is provided with scrobicular ring, and seal ring is located at the scrobicular ring place.When safety check was closed, seal ring was compressed by the valve body frustum, reaches the effect of sealing.

Superiority of the present utility model is: simple in structure, and low cost of manufacture, non-return is effective, and forward voltage drop is low.The utility model can be widely used in preventing the lower exit part of fluid reflux, on water supply pipe, and source on the effectively anti-sealing backflow pollution.

Below by specific embodiment in detail the utility model is described in detail.

Description of drawings

Accompanying drawing 1 example one check valve seal status architecture schematic representation;

Accompanying drawing 2 examples one safety check water flowing status architecture schematic representation;

Accompanying drawing 3 examples two check valve seal status architecture schematic representation.

The figure number explanation

Among Fig. 1 and Fig. 2,

Valve body-1 frustum--11 cascade inner chamber steps--12 scrobicular ring--13

Valve seat-2 valve seat through-hole--21 circles are recessed--22

Spool-3 bulge loop--31 supporting rib--32 scrobicular rings-33

Seal ring 4,5

Among Fig. 3

Valve body-1 ' frustum-11 ' cascade inner chamber step-12 ' scrobicular ring-13 '

Valve seat-2 ' valve seat through-hole-21 '

The protruding rank of spool-3 ' bulge loop-31 ' supporting rib-32 '--321 '

Tapering-34 ' scrobicular ring-341 '

Seal ring--4 ', 5 '

Embodiment

Embodiment 1:

A kind of safety check comprises valve body 1, valve seat 2 and spool 3, wherein:

One valve body 1 is provided with the cascade inner chamber, and the bottom of ladder is provided with frustum 11, and the bottom of valve body 1 is a spiral shell mosquito connecting head, which is provided with scrobicular ring 13, socket seal ring 4 on the scrobicular ring 13;

One valve seat 2 fixes at valve body 1 cascade inner chamber step 12 places;

One spool 3 passes valve seat through-hole 21, top and valve seat 2 sealings, the bulge loop 31 and valve seat 2 bottoms of the restricted spool stroke in spool 3 bottoms are replaced, spool 3 bottoms are provided with four supporting ribs 32, have formed diversion cavity in spool 3 bottoms, and spool 3 is by seal ring 5 and valve seat 2 sealings.

The threaded connector of valve body 1 is connected with pipeline, and its cascade inner-cavity structure makes entry young, and water outlet is big, and when valve open, bulge loop 31 is replaced by valve seat 2 bottoms, and fluid flows out fast along diversion cavity, and positive pressure is fallen little; Work as hypotension, when safety check was closed, spool 3 was sealed and matched through seal ring 5 with valve seat 2.

Be further to enlarge water outlet, be provided with circle along through hole 21 places on valve seat 2 tops recessed 22, makes liquid stream more unobstructed.

On the such scheme basis, sealing configuration of the present utility model is: seal ring 5 is located at scrobicular ring 33 places on spool top.

Embodiment 2:

The utility model safety check comprises valve body 1 ', valve seat 2 ' and spool 3 ', wherein, valve body 1 ' is identical with embodiment one with valve seat 2 ', valve body 1 ' is provided with the cascade inner chamber, the bottom of ladder is provided with frustum 11 ', the bottom of valve body 1 ' is a spiral shell mosquito connecting head, which is provided with scrobicular ring 13 ', and scrobicular ring 13 ' is gone up socket seal ring 4 '.

Valve seat 2 ' fixes at valve body 1 ' cascade inner chamber step 12 places;

Spool 3 ' passes valve seat 2 ' through hole 21 ', and spool 3 ' seals by seal ring 6 with valve seat 2 ', and the bulge loop 31 ' of the restricted spool stroke in spool 3 ' bottom is replaced with valve seat 2 ' bottom, and spool 3 ' middle part is provided with four supporting ribs 32 ' and has formed diversion cavity.

Different with embodiment and the foregoing description is: the bottom of spool 3 ' bulge loop 31 ' is provided with tapering 34 ', with the frustum 11 ' coupling of body cavity, bulge loop 31 ' upper edge supporting rib 32 ' is provided with protruding rank 321 ', during conducting, valve seat 2 ' bottom is replaced on protruding rank 321 ', and fluid flows out along diversion cavity.

The tapering 34 ' of described spool 3 ' bottom is provided with scrobicular ring 341 ', and seal ring 5 ' is located at scrobicular ring 341 ' and locates.When safety check was closed, seal ring 5 ' was compressed by valve body frustum 11 ', reaches the effect of sealing.

Claims (5)

1. a safety check comprises valve body, valve seat and spool, it is characterized in that:
One valve body is provided with the cascade inner chamber;
One valve seat fixes at valve body cascade inner chamber place;
One spool passes valve seat through-hole, and the bulge loop and the valve seat bottom of the restricted spool stroke in spool bottom are replaced, and spool is provided with supporting rib and forms diversion cavity, and spool is by seal ring and valve base sealing.
2. safety check according to claim 1 is characterized in that: described valve seat top is provided with circle along the through hole recessed.
3. safety check according to claim 1 and 2 is characterized in that: described seal ring is located at the scrobicular ring place on spool top.
4. safety check according to claim 1 is characterized in that: the bottom of described spool bulge loop is provided with the tapering, and with the frustum coupling of body cavity, bulge loop upper edge supporting rib is provided with protruding rank, and during conducting, the valve seat bottom is replaced on protruding rank.
5. safety check according to claim 4 is characterized in that: the tapering of described spool bottom is provided with scrobicular ring, and seal ring is located at the scrobicular ring place.
CNU2007200706617U 2007-06-05 2007-06-05 Back valve CN201090794Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200706617U CN201090794Y (en) 2007-06-05 2007-06-05 Back valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007200706617U CN201090794Y (en) 2007-06-05 2007-06-05 Back valve

Publications (1)

Publication Number Publication Date
CN201090794Y true CN201090794Y (en) 2008-07-23

Family

ID=39862554

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007200706617U CN201090794Y (en) 2007-06-05 2007-06-05 Back valve

Country Status (1)

Country Link
CN (1) CN201090794Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101994726A (en) * 2010-11-29 2011-03-30 广西玉柴重工有限公司 One-way throttle valve
CN102182530A (en) * 2011-01-31 2011-09-14 潍柴动力股份有限公司 Engineering machine and engine oil checking valve of engine thereof
CN103277552A (en) * 2013-05-31 2013-09-04 陈相源 Flow-limiting valve
CN106917747A (en) * 2015-12-24 2017-07-04 株式会社丰田自动织机 The check-valves of compressor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101994726A (en) * 2010-11-29 2011-03-30 广西玉柴重工有限公司 One-way throttle valve
CN102182530A (en) * 2011-01-31 2011-09-14 潍柴动力股份有限公司 Engineering machine and engine oil checking valve of engine thereof
CN103277552A (en) * 2013-05-31 2013-09-04 陈相源 Flow-limiting valve
CN106917747A (en) * 2015-12-24 2017-07-04 株式会社丰田自动织机 The check-valves of compressor

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080723