CN202360819U - Low-resistance check valve - Google Patents

Low-resistance check valve Download PDF

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Publication number
CN202360819U
CN202360819U CN 201120527717 CN201120527717U CN202360819U CN 202360819 U CN202360819 U CN 202360819U CN 201120527717 CN201120527717 CN 201120527717 CN 201120527717 U CN201120527717 U CN 201120527717U CN 202360819 U CN202360819 U CN 202360819U
Authority
CN
China
Prior art keywords
valve
spool
guide sleeve
valve body
spring
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
CN 201120527717
Other languages
Chinese (zh)
Inventor
柴为民
陈永新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANGZHOU CHUNJIANG VALVE CO Ltd
Original Assignee
HANGZHOU CHUNJIANG VALVE CO Ltd
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 HANGZHOU CHUNJIANG VALVE CO Ltd filed Critical HANGZHOU CHUNJIANG VALVE CO Ltd
Priority to CN 201120527717 priority Critical patent/CN202360819U/en
Application granted granted Critical
Publication of CN202360819U publication Critical patent/CN202360819U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a low-resistance check valve. The low-resistance check valve is characterized by comprising a valve body and a valve cover connected with the valve body, wherein a one-way valve is arranged in a cavity formed by the valve body and the valve cover; a water inlet and a water outlet are formed at end parts of the valve body and the valve cover respectively, and the center lines of the water inlet, the water outlet and the one-way valve are consistent; the one-way valve comprises a valve seat, a valve core matched with the valve seat, a valve rod connected to the valve core, and a guide sleeve matched with the valve rod in a sliding mode; a first spring is arranged between the guide sleeve and the valve core; a radial triangular groove is formed at the downstream end of the valve rod; the guide sleeve consists of an inner ring and an outer ring, and the inner ring is connected with the outer ring through connecting bars; a through hole is drilled in the center of each connecting bar, and a steel ball, a second spring and an adjusting screw are arranged in the through holes in sequence; and the steel ball acts on an inclined plane on the left side of the triangular groove under the condition that the valve core is closed. The low-resistance check valve is low in energy consumption, and the sealability is not influenced.

Description

The lower resistance safety check
Technical field
The utility model relates to a kind of valve, relates in particular to a kind of lower resistance safety check.
Background technique
In the pipe-line system of carrying liquid medium, for various reasons, flow backwards in order to prevent medium, generally use safety check.In common safety check, exert pressure to spool by spring, spool is pressed on realizes sealing on the corresponding valve seat.The size of impacting force is confirmed by the requirement of sealing.The deficiency of this safety check is: behind valve open along with the increase of flow; The spool aperture increases, and the spool aperture increases, and amount of spring compression increases; The spring force increase that also is directly proportional; Be the increase that is directly proportional of the flow resistance of medium, must consume more energy, especially higher heavy caliber safety check for this reason seal request.
Summary of the invention
The main purpose of the utility model is to solve the above-mentioned deficiency of existing in prior technology, thereby develops a kind of lower resistance safety check that does not influence sealing force.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals: a kind of lower resistance safety check is characterized in that: have valve body and the valve gap that links to each other with valve body, in valve body and the formed cavity of valve gap, be provided with one-way valve; The end of said valve body and valve gap forms water intake and water outlet respectively, and the center line of said water intake, water outlet and one-way valve is consistent; Said one-way valve comprises valve seat, and the spool that matches with valve seat is connected the valve rod on the spool, and the guide sleeve with the valve rod cunning is joined is equipped with spring one between said guide sleeve and spool; Said valve rod downstream has radially triangular groove; Said guide sleeve is made up of inner ring and outer ring; Connect by connecting tendon between the inside and outside circle; The center of every connecting tendon is drilled with through hole, is provided with steel ball, spring two and adjusting screw in the through hole in order, and steel ball is on the inclined-plane that acts on valve rod triangular groove left side under the situation that spool is closed.
The technological scheme of the utility model can also be further perfect:
As preferably, said guide sleeve is installed in the endoporus of valve body downstream, and compresses with valve gap, and the inner hole centreline that the back guide sleeve is installed is consistent with valve inlet/outlet center line.
As preferably, to adopt between said valve body and the valve gap to be threaded, the joint is with O-ring seals two sealings.
As preferably, said valve seat is an inner conical surface, is positioned on the water inlet at valve body middle part; Said spool adopts with valve rod and is threaded, and the centre is provided with spacer.
The beneficial effect of the utility model is:
Under the situation of not water flowing, the O-ring seals one on the spool is close on the corresponding valve seat under the effect of inclined-plane, triangular groove left side axial thrust load on the pretightening force of spring one and the valve rod, has therefore guaranteed the constant F1=F3+F4 of sealing force.
After the water flowing, when the difference of import hydraulic pressure and outlet hydraulic pressure during greater than sealing force, spool is opened, and supplies water downstream.Along with the increase of flow, spool is progressively opened, after mobile △ S distance; The inclined-plane extremely contacts the steel ball jacking with the cylindrical of valve rod; This moment, the axial thrust load on inclined-plane was zero, because the rolling friction power of steel ball and valve rod cylindrical is very little, can ignore; Therefore in the moving of this back valve core, its suffered power of closing is merely the active force of spring one.Because the rigidity of the spring in the ratio of rigidity general check valve of spring one is much little, so spool the close power suffered in arbitrary position is always less than the power of closing of general check valve.When reaching rated flow, the aperture of spool is maximum, and it is maximum that the decrement of spring one reaches, and the power of closing that spool receives is F2, much smaller than F5, has so just reduced the flow resistance of medium effectively.
After medium stopped to flow, spool was reset to closed condition rapidly under the effect of spring one.
The principle of the utility model also is applicable to the safety check of other pattern.
Description of drawings
Accompanying drawing 1 is a kind of structural section figure of the utility model;
The A-A sectional drawing of accompanying drawing 2 Fig. 1;
Accompanying drawing 3 is another kind of phase diagrams of Fig. 1;
Accompanying drawing 4 is that the utility model and general check valve are closed force characteristic curve comparison diagram.
Description of reference numerals: 1, valve body, 2, spool, 3, O-ring seals one, 4, spacer, 5, valve rod; 6, helical spring one, 7, guide sleeve, 8, adjusting screw, 9, O-ring seals two, 10, helical spring two; 11, steel ball, 12, valve gap, P1, inlet pressure, P2, outlet pressure.
Thick oblique line 1.-the general check valve spring characteristic curve;
Thin oblique line 2.-the utility model spring characteristic curve;
Dotted line 3.-axial thrust load F3 and the steel ball rolling friction power △ F ≈ 0 surperficial that the power on the inclined-plane that acts on produces with axostylus axostyle;
Dot and dash line 4.-spring force with tiltedly become axial thrust load etc. to synthesize after characteristic curve;
The S-amount of spring compression;
S1-spring pre compressed magnitude;
Amount of spring compression after the S2-spool is all opened;
F-acts on the power of closing on the spool;
Act on the power of closing on the spool during not water flowing of F1-, i.e. sealing force F1=F3+F4
The F2-spool acts on the power of closing F2 on the spool much smaller than F5 when all opening;
The suffered inclined-plane axial thrust load F3 ≈ 3Ptg ɑ of spool during not water flowing of F3-;
P-spring two acts on the radial force on the inclined-plane through steel ball;
The gradient on ɑ-inclined-plane, triangular groove left side;
The suffered spring force of spool during not water flowing of F4-;
F5-general check valve spool acts on the power of closing on the spool when all opening;
The rolling friction power △ F ≈ 0 of △ F-ball and stem surface.
Embodiment
Below through embodiment and combine accompanying drawing, the technological scheme of the utility model is further specified.
Embodiment:
Lower resistance safety check shown in Fig. 1-3 is made up of valve body 1 spool 2, O-ring seals 1, spacer 4, valve rod 5, helical spring 1, guide sleeve 7, adjusting screw 8, O-ring seals 29, helical spring 2 10, steel ball 11, valve gap 12.Valve body 1 is threaded with valve gap 12 usefulness; The center that connects back water intake and water outlet is consistent, and the flange of two ends connects inlet pipeline and outlet conduit, an inner conical surface of getting on the bus in the water inlet at valve body 1 middle part with bolt respectively; As the valve seat of safety check, O-ring seals 29 leaks in order to prevent medium; Guide sleeve 7 is installed in the endoporus in valve body 1 downstream, and compresses with valve gap 12, and the inner hole centreline that back guide sleeve 7 is installed is consistent with valve import and export center line; Spool 2 is threaded with valve rod 5 usefulness, and the centre is provided with spacer 4, the hardness HRC of valve rod 5>50, and the downstream car of valve rod 5 has triangular groove, and valve rod 5 cunnings fit in the endoporus of guide sleeve 7, and the motion of spool 2 is play the guiding role; Between the groove on spool 2 right sides and guide sleeve 7, be provided with spring 1, certain pressure is arranged after the installation, therefore under the situation of not water flowing, the O-ring seals 1 on spool 2 conical surfaces is close on the valve seat all the time; The Internal and external cycle of guide sleeve 7 is connected by three connecting tendons of dividing equally, and the center of every muscle is drilled with through hole, in establish steel ball 11, spring 2 10 and adjusting screw 8; Steel ball 11 is on the inclined-plane that acts on valve rod 5 triangular grooves left side under the situation that spool 2 is closed; Utilize the axial thrust load that pressure produced on 11 pairs of inclined-planes of steel ball, spool has been increased the additional power of closing (Fig. 4 F3), so just can reduce the rigidity of spring 6; To be implemented under the constant situation of sealing force, reduce the flow resistance of medium.Adjusting screw 8 is in order to regulate the pressure on 11 pairs of inclined-planes of steel ball.The correct position of triangular groove can be by spacer 4 adjustment, consider O-ring seals 1 with long afterwards distortion, must make steel ball 11 act on the triangular groove left side after the adjustment and leans on the inclined-plane of updrift side.

Claims (4)

1. a lower resistance safety check is characterized in that: have valve body (1) and the valve gap that links to each other with valve body (12), in valve body (1) and the formed cavity of valve gap (12), be provided with one-way valve; Said valve body (1) forms water intake and water outlet respectively with the end of valve gap (12), and the center line of said water intake, water outlet and one-way valve is consistent; Said one-way valve comprises valve seat, and the spool that matches with valve seat (2) is connected the valve rod (5) on the spool (1), and the guide sleeve (7) with the valve rod cunning is joined is equipped with spring one (6) between said guide sleeve (7) and spool (2); Said valve rod (5) downstream has radially triangular groove; Said guide sleeve (7) is made up of inner ring and outer ring; Connect by connecting tendon between the inside and outside circle; The center of every connecting tendon is drilled with through hole; Be provided with steel ball (11), spring two (10) and adjusting screw (8) in the through hole in order, steel ball (11) is on the inclined-plane that acts on valve rod (5) triangular groove left side under the situation that spool (2) is closed.
2. lower resistance safety check according to claim 1 is characterized in that: said guide sleeve (7) is installed in the endoporus of valve body (1) downstream, and compresses with valve gap (12), and the inner hole centreline that back guide sleeve (7) is installed is consistent with valve inlet/outlet center line.
3. lower resistance safety check according to claim 1 and 2 is characterized in that: adopt between said valve body (1) and the valve gap (12) to be threaded, the joint is with O-ring seals two (9) sealings.
4. lower resistance safety check according to claim 1 and 2 is characterized in that: said valve seat is an inner conical surface, is positioned on the water inlet at valve body (1) middle part; Said spool (2) adopts with valve rod (5) and is threaded, and the centre is provided with spacer (4).
CN 201120527717 2011-12-16 2011-12-16 Low-resistance check valve Expired - Lifetime CN202360819U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120527717 CN202360819U (en) 2011-12-16 2011-12-16 Low-resistance check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201120527717 CN202360819U (en) 2011-12-16 2011-12-16 Low-resistance check valve

Publications (1)

Publication Number Publication Date
CN202360819U true CN202360819U (en) 2012-08-01

Family

ID=46572007

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201120527717 Expired - Lifetime CN202360819U (en) 2011-12-16 2011-12-16 Low-resistance check valve

Country Status (1)

Country Link
CN (1) CN202360819U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102563136A (en) * 2011-12-16 2012-07-11 杭州春江阀门有限公司 Low-resistance non-return valve
CN103090062A (en) * 2013-01-31 2013-05-08 马友朝 One-way valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102563136A (en) * 2011-12-16 2012-07-11 杭州春江阀门有限公司 Low-resistance non-return valve
CN103090062A (en) * 2013-01-31 2013-05-08 马友朝 One-way valve
CN103090062B (en) * 2013-01-31 2015-04-01 马友朝 One-way valve

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C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20120801

CX01 Expiry of patent term