CN209213100U

CN209213100U - Anti-backflow valve

Info

Publication number: CN209213100U
Application number: CN201822222233.2U
Authority: CN
Inventors: 苏宗尧
Original assignee: ZHEJIANG SUMING VALVES Co Ltd
Current assignee: ZHEJIANG SUMING VALVES Co Ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2019-08-06
Anticipated expiration: 2028-12-27

Abstract

The utility model provides a kind of anti-backflow valve, belongs to field of mechanical technique.It solves the problems, such as that existing backflow preventer door body product is big, occupied space is more.It is water inlet end and the other end is the valve body of water outlet that it, which includes one end, spool is equipped in valve body, non-return fuse is equipped in water outlet, non-return fuse includes seal head and the support rod connected with seal head, positioning ring is fixed in water outlet, positioning ring fixedly connected to the inner side the locating plate of energy water flowing and support boom end passes through locating plate, circumferentially arranged with several guiding protrusions on the outside of seal head, the lateral surface of each guiding protrusion is located on same circumference and forms clearance fit between each guiding protrusion and water outlet, spring is arranged on support rod, both ends of the spring is withstood on respectively on locating plate and seal head, there is the sealing surface of annular in water outlet, seal head is resisted against on sealing surface under the elastic force effect of spring.It has many advantages, such as that small in size, occupied space is few.

Description

Anti-backflow valve

Technical field

The utility model belongs to valve technology field, is related to a kind of valve more particularly to a kind of anti-backflow valve.

Background technique

Currently, small towns, municipal water users are usually equipped with water meter on running water pipe road to measure its water consumption, And tap water leakage causes the loss of water resource in order to prevent, usually will be installed before user's water meter such as gate valve, ball valve often The valve of rule as adjusting and cut-off equipment to use.In addition, the refluence of medium influences the metering of user's water meter in order to prevent, it is right The management of water resource causes confusion, and will increase a check-valves to be combined use with the valve of control opening and closing.

At present for, the valve and check-valves for controlling opening and closing are all independent from each other valve, combine use when all It is directly to be installed to the non-return fuse in check-valves in the water outlet of control opening/shutting valve.Existing non-return fuse generally all wraps It includes the seal head for realizing sealing and protrudes from the support rod at seal head both ends, need to fix two positioning in water outlet Piece, wherein a support rod passes through one of locating plate, another support rod passes through another locating plate, thus to non-return core Movement of the son in water outlet is supported and is oriented to, but the length of this non-return fuse is long, to going out in valve It is fixed in water end (W.E.), it is necessary to the water outlet of valve is arranged long, so just will increase the volume of valve body, from And more spaces are occupied during installation.

Summary of the invention

The purpose of this utility model is in view of the above-mentioned problems existing in the prior art, to propose a kind of anti-backflow valve, institute Technical problems to be solved are how to reduce valve volume, reduce space required when installation.

The purpose of this utility model can be realized by the following technical scheme:

Anti-backflow valve, including one end be water inlet end and the other end is the valve body of water outlet, is equipped with energy in the valve body The spool that water inlet end is connected to or blocks with water outlet is controlled, is equipped with non-return fuse in water outlet, which is characterized in that described is non-return Fuse includes seal head and the support rod connected with seal head, is fixed with positioning ring in water outlet, positioning ring has been fixedly connected to the inner side The locating plate and support boom end of energy water flowing pass through locating plate, and seal head outside is circumferentially arranged with several guiding protrusions, each guiding The lateral surface of protrusion is located on same circumference and forms clearance fit between each guiding protrusion and water outlet, is arranged on support rod Spring, both ends of the spring are withstood on respectively on locating plate and seal head, have the sealing surface of annular in water outlet, seal head is in spring It is resisted against on sealing surface under elastic force effect.

The seal head of non-return fuse is resisted against on sealing surface under the elastic force effect of spring and forms sealing, normally when water outlet, Water flow flows into valve body from water inlet end and in the presence of hydraulic pressure seal head is squeezed sealing surface, is normally discharged to realize.When After valve is closed, seal head, which is resisted against under the action of the spring again on sealing surface, forms sealing, due to the action direction of spring With the normal water discharging direction of valve on the contrary, therefore can play the role of preventing from being connected to the aqueous reflux in the pipeline of valve rear end.

It is required to be arranged support rod for by the way of non-return fuse is supported using both ends in compared with the prior art, Non-return fuse in this anti-backflow valve on the outside of seal head by the way of being arranged several guiding protrusions and a support rod The movement of non-return fuse is supported and is oriented to, therefore water outlet length can be shortened well, reduces the volume of valve body, Reduce space required when installation.

In above-mentioned anti-backflow valve, it is arranged with loose joint nut outside the water outlet, is equipped with ring-type on the outside of positioning ring Shoulder block, cyclic annular shoulder block are resisted against on the end face of water outlet, and annular convex shoulder is equipped on the inside of loose joint nut, and cyclic annular shoulder block extends to water outlet The lateral surface at end, and the cyclic annular shoulder block for extending to water outlet lateral surface is resisted against on annular convex shoulder.

It is arranged loose joint nut outside water outlet for realizing the loose joint of valve, cyclic annular shoulder block is set on the outside of positioning ring, it is cyclic annular It is resisted against while shoulder block is resisted against on the end face of water outlet on the annular convex shoulder on the inside of loose joint nut, is positioned such that ring can It is supported in the support rod to non-return fuse while loose joint nut is limited, prevent loose joint nut from taking off from water outlet It falls.

In above-mentioned anti-backflow valve, the seal head includes positioning disk and positioning column, and support rod, which is connected in, leads To an end face of disk, positioning column protrudes from the other end of positioning disk, and each protrusion that is oriented to is located on the outside of positioning disk, on the outside of positioning column Equipped with annular groove one, it is equipped with gasket in annular groove one, gasket is resisted against on sealing surface close to an end face of water inlet end.

Seal head includes positioning disk and positioning column, and each protrusion that is oriented to is arranged on the outside of positioning disk to prop up seal head Support and guiding, while being arranged gasket on the outside of the positioning column of seal head, such gasket close to an end face of water inlet end against It can play the role of anti-backflow on sealing surface.

In above-mentioned anti-backflow valve, the water outlet includes that water exit end one and internal diameter are greater than along water discharging direction The water exit end two of water section one, sealing surface are connected to the inner sidewall of water exit end one and the inner sidewall of water exit end two, and positioning column end is stretched Enter in water exit end one, annular groove two is additionally provided on the outside of positioning column, sealing ring, sealing ring lateral surface and water outlet are equipped in annular groove two One inner sidewall of section leans.

It is resisted against on sealing surface to be formed at one close to an end face of water inlet end in gasket and seal, positioning column end protrudes into out In water section one, sealing ring lateral surface on the outside of positioning column is set and one inner sidewall of water exit end leans and forms sealing at one, It can guarantee the anti-backflow effect of this valve by dual-seal.

In above-mentioned anti-backflow valve, the locating plate is in long sheet, and locating plate center is equipped with supported hole, support rod End passes through supported hole.

Locating plate is in long sheet, therefore locating plate has no effect on normal water outlet, while being arranged at locating plate center and supporting Hole can be supported and be oriented to support rod again, guarantee that non-return fuse can be moved smoothly.

Compared with prior art, this anti-backflow valve is convex by the way that several guiding are arranged on the outside of the seal head of non-return fuse Portion is supported and is oriented to non-return fuse using guiding protrusion and water outlet inner wall clearance fit, a support is omitted Thus the setting of bar shortens the length of water outlet well, reduce the volume of valve body, reduces sky required when installation Between.

In addition, being resisted against on sealing surface by gasket and sealing ring lateral surface and one inner sidewall of water exit end lean shape At dual-seal, so that the anti-backflow effect of this valve is more preferable.

Detailed description of the invention

Fig. 1 is the cross-sectional view of this anti-backflow valve.

Fig. 2A is the side view that this anti-backflow valve stops inverse fuse.

Fig. 2 B is the main view that this anti-backflow valve stops positioning disk on inverse fuse.

Fig. 3 A is the main view of positioning ring in this anti-backflow valve.

Fig. 3 B is the cross-sectional view of positioning ring in this anti-backflow valve.

In figure, 1, valve body；1a, water inlet end；1b, water outlet；1b1, sealing surface；1b2, water exit end one；1b3, water exit end two； 2, spool；3, non-return fuse；3a, seal head；3a1, positioning disk；3a11, guiding protrusion；3a2, positioning column；3a21, annular groove One；3a22, annular groove two；3b, support rod；4, positioning ring；4a, locating plate；4a1, supported hole；4b, cyclic annular shoulder block；5, spring； 6, loose joint nut；6a, annular convex shoulder；7, gasket；8, sealing ring；9, valve rod；10, annular gasket.

Specific embodiment

It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

As shown in Figure 1, anti-backflow valve, the valve body 1 that including one end be water inlet end 1a and the other end is water outlet 1b, valve body Being equipped in 1 can control the spool 2 that water inlet end 1a is connected to or separates with water outlet 1b, and spool 2 is core, valve body in the present embodiment Valve rod 9 is additionally provided in 1,9 lower end of valve rod and core are connected, and 9 upper end of valve rod extends to outside valve body 1.

As shown in Figure 1, Figure 2, shown in Fig. 3 A and Fig. 3 B, non-return fuse 3 is equipped in the 1b of water outlet, non-return fuse 3 includes seal head It is fixed with positioning ring 4 in 3a and the support rod 3b being connected with seal head 3a, water outlet 1b, positioning ring 4, which has been fixedly connected to the inner side, to be led to The locating plate 4a of water, locating plate 4a are specifically in long sheet, and the both ends locating plate 4a and 4 inner wall of positioning ring are connected, the center locating plate 4a Equipped with supported hole 4a1, the end support rod 3b passes through supported hole 4a1.

As shown in Figure 1 and shown in Figure 3 B, it is arranged with loose joint nut 6 outside the 1b of water outlet, cyclic annular shoulder block 4b is equipped on the outside of positioning ring 4, Cyclic annular shoulder block 4b is resisted against on the end face of water outlet 1b, and annular convex shoulder 6a is equipped on the inside of loose joint nut 6, and cyclic annular shoulder block 4b is extended to The lateral surface of water outlet 1b, and the cyclic annular shoulder block 4b for extending to water outlet 1b lateral surface is resisted against on annular convex shoulder 6a, loose joint spiral shell Annular gasket 10 is additionally provided on the inside of cap 6.

Shown in A and Fig. 2 B as shown in Figure 1, Figure 2, circumferentially arranged with several guiding protrusion 3a11 on the outside of seal head 3a, respectively it is oriented to convex The lateral surface of portion 3a11 is located on same circumference, and forms clearance fit between each guiding protrusion 3a11 and water outlet 1b.Support Spring 5 is arranged on bar 3b, 5 both ends of spring are withstood on respectively on locating plate 4a and seal head 3a, have annular in the 1b of water outlet Sealing surface 1b1, sealing surface 1b1 are resisted against sealing surface under the elastic force effect of spring 5 towards the port of water outlet 1b, seal head 3a Sealing is formed on 1b1.

As shown in figure 1 and 2 a, specifically, water outlet 1b includes that one 1b2 of water exit end and internal diameter are small along water discharging direction The inner sidewall of one 1b2 of water exit end is connected to two 1b3's of water exit end in water exit end two 1b3, sealing surface 1b1 of one 1b2 of water exit end Inner sidewall.Seal head 3a includes positioning disk 3a1 and positioning column 3a2, and support rod 3b is connected in an end face of positioning disk 3a1, fixed Position column 3a2 protrudes from the other end of positioning disk 3a1, and each protrusion 3a11 that is oriented to is set on the outside of positioning disk 3a1, outside positioning column 3a2 Side is equipped with one 3a21 of annular groove and two 3a22 of annular groove, is equipped with gasket 7 in one 3a21 of annular groove, gasket 7 is close to water inlet end An end face of 1a is resisted against on sealing surface 1b1, and the end of positioning column 3a2 is protruded into one 1b2 of water exit end, is set in two 3a22 of annular groove There is sealing ring 8,8 lateral surface of sealing ring leans with one 1b2 inner sidewall of water exit end.

Gasket 7 is resisted against on sealing surface 1b1 and 8 lateral surface of sealing ring and one 1b2 inner sidewall of water exit end lean and Form dual-seal, when normal water outlet, water flow flows into valve body 1 from water inlet end 1a and in the presence of hydraulic pressure squeezes seal head 3a Sealing surface 1b1 is opened, to realize normal water outlet.After valve is closed, gasket 7 is resisted against under the action of spring 5 close again On cover 1b1 and 8 lateral surface of sealing ring and one 1b2 inner sidewall of water exit end lean to form dual-seal, due to the effect of spring 5 Therefore direction and the normal water discharging direction of valve are on the contrary, can play the work for preventing from being connected to the aqueous reflux in the pipeline of valve rear end With.

Compared with the prior art in using both ends be required to be arranged support rod 3b non-return fuse 3 is supported by the way of and Speech, the non-return fuse 3 in this anti-backflow valve use be arranged on the outside of seal head 3a the guiding protrusion 3a11 of several protrusions with The mode of a piece support rod 3b is supported and is oriented to the movement of non-return fuse 3, therefore can shorten water outlet 1b well Length reduces the volume of valve body 1, reduces space required when installation.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims

1. anti-backflow valve, the valve body (1) that including one end be water inlet end (1a) and the other end is water outlet (1b), the valve body (1) being equipped in can control the spool (2) that water inlet end (1a) is connected to or blocks with water outlet (1b), be equipped in water outlet (1b) non-return Fuse (3), which is characterized in that the non-return fuse (3) includes seal head (3a) and the support connected with seal head (3a) Bar (3b) is fixed with positioning ring (4) in water outlet (1b), and positioning ring (4) fixedly connected to the inner side the locating plate (4a) of energy water flowing and props up The strut end (3b) passes through locating plate (4a), each to be oriented to circumferentially arranged with several guiding protrusions (3a11) on the outside of seal head (3a) The lateral surface of protrusion (3a11) is located on same circumference and is respectively oriented to formation gap between protrusion (3a11) and water outlet (1b) and matches It closes, is arranged with spring (5) on support rod (3b), spring (5) both ends are withstood on respectively on locating plate (4a) and seal head (3a), water outlet The sealing surface (1b1) in (1b) with annular is held, seal head (3a) is resisted against sealing surface under the elastic force effect of spring (5) On (1b1).

2. anti-backflow valve according to claim 1, which is characterized in that be arranged with loose joint spiral shell outside the water outlet (1b) Cap (6), positioning ring (4) outside are equipped with cyclic annular shoulder block (4b), and cyclic annular shoulder block (4b) is resisted against on the end face of water outlet (1b), loose joint It is equipped with annular convex shoulder (6a) on the inside of nut (6), cyclic annular shoulder block (4b) extends to the lateral surface of water outlet (1b), and extends to water outlet The cyclic annular shoulder block (4b) of end (1b) lateral surface is resisted against on annular convex shoulder (6a).

3. anti-backflow valve according to claim 2, which is characterized in that the seal head (3a) includes positioning disk (3a1) and positioning column (3a2), support rod (3b) are connected in an end face of positioning disk (3a1), and positioning column (3a2), which protrudes from, leads To the other end of disk (3a1), respectively it is oriented to protrusion (3a11) and is located on the outside of positioning disk (3a1), ring is equipped on the outside of positioning column (3a2) Shape slot one (3a21), annular groove one (3a21) is interior to be equipped with gasket (7), and gasket (7) is supported close to an end face of water inlet end (1a) It leans against on sealing surface (1b1).

4. anti-backflow valve according to claim 3, which is characterized in that the water outlet (1b) includes along water discharging direction Water exit end one (1b2) and internal diameter are greater than the water exit end two (1b3) of water exit end one (1b2), and sealing surface (1b1) is connected to water exit end The inner sidewall of one (1b2) and the inner sidewall of water exit end two (1b3), the end positioning column (3a2) are protruded into water exit end one (1b2), fixed It is additionally provided with annular groove two (3a22) on the outside of position column (3a2), is equipped with sealing ring (8) in annular groove two (3a22), on the outside of sealing ring (8) Face leans with water exit end one (1b2) inner sidewall.

5. anti-backflow valve according to claim 1 or 2 or 3 or 4, which is characterized in that the locating plate (4a) is in length Sheet, the locating plate center (4a) are equipped with supported hole (4a1), and the support rod end (3b) passes through supported hole (4a1).