CN208703203U - A kind of non-return valve - Google Patents

Abstract

The utility model belongs to valve technology field, refers in particular to a kind of non-return valve.Including valve body, the valve inner is formed with a cavity, cavity one end is equipped with water inlet, the other end is equipped with water outlet, it is located at water outlet end in the cavity and is equipped with valve seat, valve seat is equipped with spool, and spring is connected between the valve seat and spool, and spring makes the spool have the trend mobile to water inlet side；The water inlet is divided into outer end and inner end, and the side wall of water inlet is gradually expanded outwardly from outer end to inner end, the upper end of the spool forms sealing, the O-ring matched with water inlet side wall is provided in sealing, the radius of O-ring is greater than the radius of the water inlet outer end, less than the radius of the water inlet inner end.The non-return valve has the function of preventing liquid from flowing backwards, and the structure of the non-return valve helps to extend the service life of non-return valve.

Description

A kind of non-return valve

Technical field

The utility model belongs to valve technology field, refers in particular to a kind of non-return valve.

Background technique

Non-return valve, which refers to, to be flowed by medium itself and automatically opens, closes flap, for preventing the valve of medium refluence, Also known as check-valves.Check-valves belongs to a kind of automatic valve, and main function is to prevent medium from flowing backwards, prevent pump and drive motor Reversion and vessel media are released.Existing non-return valve generally passes through the phase in two faces during realizing non-return sealing Mutually closure, to achieve the purpose that sealing, there are some in such seal form, i.e., in the long-term use, due to by liquid The reasons such as body erosion, which will lead to the matching relationship between valve inner component, slowly to be lost, and not have corresponding effect, so One, non-return valve can also lose its corresponding function.

Summary of the invention

The utility model is in view of the above-mentioned problems, provide a kind of non-return valve that service life is relatively more permanent.

Purpose of the utility model is realized as follows:

A kind of non-return valve, including valve body, the valve inner are formed with a cavity, and cavity one end is equipped with water inlet, another End is equipped with water outlet, and water outlet end is located in the cavity and is equipped with valve seat, valve seat is equipped with spool, between the valve seat and spool It is connected with spring, spring makes the spool have the trend mobile to water inlet side；

The water inlet is divided into outer end and inner end, and the side wall of water inlet is gradually expanded outwardly from outer end to inner end, institute The upper end for stating spool forms sealing, is provided with the O-ring matched with water inlet side wall in sealing, the radius of O-ring is big Radius in the water inlet outer end, less than the radius of the water inlet inner end.

Further, guide post is formed on the valve seat, the lower end of the spool is equipped with the sleeve being placed on the guide post, The spring pocket is set on the guide post, and one end is against on valve seat, and the other end is against in sleeve.

Further, pilot hole is formed in the guide post, the spool is formed with leads with what the pilot hole matched Bar.

Further, it is formed with support ring on the side wall of the spool, supporting rib, the diameter of supporting rib are evenly equipped in support ring It is greater than the radical length of the water inlet inner end to length.

Further, the cavity is located at water outlet end and is also connected with filter mantle, is equipped on the valve seat and filter mantle Filter mesh.

Further, the outer end of valve seat is arranged in the filter mantle, and the cavity inner wall, which is formed with, hooks angle, the filter mantle It is formed with the hook ring matched with the hook angle.

Further, the inner wall of the outer end Gou Jiao is inclined to set.

Further, constant current piece is provided between the filter mantle and valve seat, the centre of constant current piece offers constant current hole.

Compared with the prior art, the utility model has prominent and beneficial technical effects that:

The inlet end of the non-return valve is designed to the water inlet with taper, effect of the spool being arranged in valve body in spring Always there can be the trend close to water inlet end under power, and the radius on spool with the mutually matched O-ring of inlet end Among the radius of water inlet outer end and inner end, thus O-ring can form with the inner wall at water inlet end and cooperate, complete At sealing.In addition O-ring is rubber material, since there is the structure of taper to design at water inlet end, O-ring is by outward During extruding, sealing can be formed between side wall always, though in the long-term use process, water inlet end inner wall and Erosion occurs for the sealing of spool, still will not influence cooperation between the two.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the schematic cross-section of non-return valve.

Fig. 2 is the structural schematic diagram of spool.

Fig. 3 is the exploded view of valve seat and filter mantle.

1- valve body, 2- cavity, 3- water inlet, 4- water outlet, 5- valve seat, 6- spool, the outer end 7-, the inner end 8-, 9- sealing, 10- guide post, 11- sleeve, 12- spring, 13- pilot hole, 14- guide rod, 15- support ring, 16- supporting rib, 17- filter mantle, 18- mistake Opening of sieve, 19- hook angle, 20- hook ring, 21- constant current piece, 22- constant current hole, 23-O shape circle.

Specific embodiment

To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work Obtained all other embodiment is put, the range that the utility model is protected is belonged to.

As shown in Figure 1, when hydraulic pressure, which is greater than spring, gives the active force of spool 6, spool 6 is just when water enters from water inlet 3 It can be oppressed to open non-return valve in cavity 2, water is finally flowed out from 4 end of water outlet, when the hydraulic pressure at 3 end of water inlet becomes smaller When, spring 12 can force spool 6 mobile to 3 end of water inlet again, so that water inlet 3 be blocked, prevent the water of water outlet end 4 inverse Stream.

In the non-return valve, water inlet 3 divides for outer end 7 and inner end 8, the interior outer end without leave 7 to inner end 8 of 3 side wall of water inlet Gradually expand outwardly, i.e. water inlet 3 has a tapered interior wall construction, the sealing 9 of spool 6 be non-return valve mainly and water inlet 3 form the position of sealing, and sealing completes the cooperation between water inlet inner wall by O-ring 23, and the radius of O-ring 23 is greater than The radius of 3 outer end 7 of water inlet, less than the radius of 3 inner end 8 of water inlet, spool 6 is under the action of spring 12, to entering When 3 end of the mouth of a river is mobile, O-ring 23 can be bonded formation sealing with the inner wall of water inlet 3.

Due to the inclined structure of 3 inner wall of water inlet, it is in the long-term use in O-ring 23 or 3 inner wall of water inlet Make in the case where corroding, still be able to ensure sealing effect between the two, ensures the effect of non-return valve, such as in check Valve is that the distance that spring 12 forces spool 6 mobile is 5mm under news, in the case that 3 inner wall of water inlet corrodes, The distance that spring 12 forces spool 6 mobile may become 6mm, but the feature tapered due to 3 inner wall of water inlet, and enter water The radius of 3 outer ends 7 of mouth is less than the radius of O-ring 23, and so O-ring 23 just remains to and the inner wall of water inlet 3 is kept Good sealing effect ensures the basic function of non-return valve.

Further, guide post is formed on valve seat 5, spool 6 is then formed with corresponding sleeve 11, and spring 12 is set in guide post 10 On, and other end is arranged in sleeve 11, so just positions the both ends of spring 12, makes the position of spring 12 Setting will not shift, and guarantee that spring 12 plays the role of spool 6.

Further, it is hollow structure inside guide post 10, is formed with pilot hole 13, spool 6 is then formed with guide rod 14, guide rod 14 move in pilot hole 13, which may insure that spool 6 moves on specified axis, will not shift, and cause close Envelope portion 9 tilts, and the sealing between 3 inner wall of O-ring 23 and water inlet is caused to cooperate failure.

As shown in Fig. 2, being formed with support ring 15 on the side wall of spool 6, supporting rib 16, supporting rib are evenly equipped in support ring 15 16 radical length is greater than the radical length of 3 inner end of water inlet.Supporting rib 16 and 15 one side of support ring are played and are strengthened The purpose of 6 structural strength of spool, past external pressure that on the other hand can be excessive by spring 12 to avoid spool 6, when being depressed into certain length When, supporting rib 16 can fit with the lower wall of 3 inner end of water inlet, limit to the shift motion of spool 6.

As shown in figs. 1 and 3, the cavity 2 is located at 4 end of water outlet and is also connected with filter mantle 17, the valve seat 5 and filter mantle Filter mesh 18 is equipped on 17.Filter mesh 18 can be filtered to by the larger impurity in check valve fluid.Valve seat 5 For first of filtering defence line, filter mantle 17 then filters defence line for second, and dual filtering defence line can play more misgivings effect Fruit.

The outer end of valve seat 5 is arranged in the filter mantle 17 as shown in Figure 1, and 2 inner wall of cavity, which is formed with, hooks angle 19, described Filter mantle 17 is formed with the hook ring 20 matched with the hook angle 19.The inner wall for hooking 19 outer end of angle is inclined to set.Filtering Cover 17 is tipped upside down on by hook ring 20 and is hooked in angle 19, and hooks the incline structure of 19 outer end inner wall of angle, has been convenient for the peace of filter mantle 17 Dress.

Further, it is provided with constant current piece 21 between filter mantle 17 and valve seat 5, offers constant current hole on constant current piece 21 22, according to use demand, the size in constant current hole 22 can be customized, make to keep quantitative by the water flow of non-return valve.

Above-described embodiment is only the preferred embodiment of the utility model, not limits the protection model of the utility model according to this It encloses, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by the protection of the utility model Within the scope of.

Claims (8)

1. a kind of non-return valve, including valve body (1), which is characterized in that be formed with a cavity (2), cavity inside the valve body (1) (2) one end is equipped with water inlet (3), and the other end is equipped with water outlet (4), and water outlet (4) end is located in the cavity (2) and is equipped with valve seat (5), valve seat (5) is equipped with spool (6), is connected with spring (12) between the valve seat (5) and spool (6), spring (12) makes institute Stating spool (6) has the trend mobile to water inlet (3) side；

The water inlet (3) is divided into outer end (7) and inner end (8), and the side wall of water inlet (3) from outer end (7) to inner end (8) by It gradually expands outwardly, the upper end of the spool (6) forms sealing (9), is provided with and water inlet (3) side wall phase in sealing (9) The O-ring (23) of cooperation, the radius of O-ring (23) are greater than the radius of the water inlet (3) outer end (7), are less than the water inlet (3) radius of inner end (8).

2. non-return valve according to claim 1, which is characterized in that be formed with guide post (10), the valve on the valve seat (5) The lower end of core (6) is equipped with the sleeve (11) being placed on the guide post (10), and the spring (12) is sheathed on the guide post (10), One end is against on valve seat (5), and the other end is against in sleeve (11).

3. non-return valve according to claim 2, which is characterized in that be formed with pilot hole (13), institute in the guide post (10) It states spool (6) and is formed with the guide rod (14) matched with the pilot hole (13).

4. non-return valve according to claim 1 or 2 or 3, which is characterized in that be formed with branch on the side wall of the spool (6) Pushing out ring (15) is evenly equipped with supporting rib (16) in support ring (15), and the radical length of supporting rib (16) is greater than in the water inlet (3) Hold the radical length of (8).

5. non-return valve according to claim 1, which is characterized in that the cavity (2) is located at water outlet (4) end and is also connected with Filter mantle (17) is equipped with filter mesh (18) on the valve seat (5) and filter mantle (17).

6. non-return valve according to claim 5, which is characterized in that the filter mantle (17) is arranged in the outer end of valve seat (5), Cavity (2) inner wall, which is formed with, hooks angle (19), and the filter mantle (17) is formed with the hook ring matched with hook angle (19) (20)。

7. non-return valve according to claim 6, which is characterized in that the inner wall for hooking angle (19) outer end is inclined to set.

8. according to non-return valve described in claim 5 or 6 or 7, which is characterized in that between the filter mantle (17) and valve seat (5) It is provided with constant current piece (21), the centre of constant current piece (21) offers constant current hole (22).