CN202719210U

CN202719210U - a check valve

Info

Publication number: CN202719210U
Application number: CN 201220354088
Authority: CN
Inventors: 王荣达
Original assignee: ZHONGSHAN LONGJING FILTER EQUIPMENT CO Ltd
Current assignee: ZHONGSHAN LONGJING FILTER EQUIPMENT CO Ltd
Priority date: 2012-07-20
Filing date: 2012-07-20
Publication date: 2013-02-06
Anticipated expiration: 2022-07-20

Abstract

The utility model discloses a check valve, including a disk seat, one with the opening adaptation of disk seat and establish the case on the opening, one is connected and plays the guide sleeve of guide effect to the case with the disk seat upper end, the case by a spherical crown structure and one with the opening adaptation of spherical crown structure and connect integrative hollow cylinder to constitute, the external diameter of spherical crown structure opening part is the same with the hollow cylinder external diameter, can integrated into one piece, save material during production, need not carry out subsequent processing moreover, simplified the production and processing process of case.

Description

A kind of check valve

Technical field

The utility model relates to a kind of device with return-stopping function, particularly a kind of check valve.

Background technique

Often use check valve carrying on the pipeline of fluid, existing check valve is provided with valve seat and spool, by cooperating of valve seat and spool, can realize making fluid only to flow and stop the return-stopping function of fluid refluence to a direction.Spool is to realize the important member of return-stopping function, existing spool is solid sphere, because the one-body molded injection moulding of solid sphere out afterwards can be because of expanding with heat and contract with cold, easily be out of shape and surface irregularity in process of production, the general normally use of processing that after production, also needs minimum 2 procedures, manufacture operation more loaded down with trivial details, and solid sphere comparison consume material, cost of production improved.

Therefore, how to realize that a kind of spool can be one-body molded and save material, the simple check valve of production and processing operation is the technical problem that needs to be resolved hurrily in the industry simultaneously.

Summary of the invention

Main purpose of the present utility model provides a kind of check valve, is intended to make the spool can be one-body molded when producing and save material, simplifies simultaneously the production and processing operation of spool.

The utility model proposes a kind of check valve, comprise a valve seat, one and the opening of valve seat adaptive and be located at spool on the opening, one pilot sleeve that is connected with valve seat upper end and spool is play the guiding role, spool is made of a spherical cap structure and a hollow cylinder adaptive with the opening of spherical cap structure and that be connected, and the external diameter of spherical cap structure opening is identical with the hollow cylinder external diameter.

Preferably, valve base inner wall face and pilot sleeve lower end outer wall are threaded connection fixing.

Preferably, the pilot sleeve internal face evenly is provided with some spools that make and moves axially and identical rib not turning or that move radially in pilot sleeve, the thickness of the Thickness Ratio end portion of rib upper end part is large, the internal diameter of office, the inherent rib underpart of pilot sleeve is identical with the diameter of spool, and is less than the diameter of spool at the internal diameter of office, rib upper end portion.

Preferably, be provided with a chimb in the valve seat, chimb is provided with a seal ring adaptive with spool, and after pilot sleeve and valve seat were spirally connected, pilot sleeve pressed seal ring and chimb fixing.

Preferably, the hollow cylinder height is not less than 1 centimetre, and the whole height of spool is less at least 1 centimetre than the length of the end portion of rib simultaneously.

Preferably, the diameter of spool is not less than 2 centimetres.

Preferably, the thickness of spool is not less than 0.3 centimetre.

Preferably, spool is made by plastic cement or metal.

Preferably, the side of valve seat end portion and bottom surface are provided with some through holes equably.

The utility model check valve comprise a valve seat, one and the opening of valve seat adaptive and be located at spool on the opening, one pilot sleeve that is connected with valve seat upper end and spool is play the guiding role, spool is made of a spherical cap structure and a hollow cylinder adaptive with the opening of spherical cap structure and that be connected, the external diameter of spherical cap structure opening is identical with the hollow cylinder external diameter, can be one-body molded during production, save material, and do not need to carry out following process, simplified the production and processing operation of spool.

Description of drawings

Fig. 1 is an embodiment's of a kind of check valve of the utility model stereogram;

Fig. 2 is an embodiment's of a kind of check valve of the utility model side sectional view;

Fig. 3 is the stereogram of valve seat among the embodiment of a kind of check valve of the utility model;

Fig. 4 is the stereogram of spool among the embodiment of a kind of check valve of the utility model;

Fig. 5 is the side view of spool among the embodiment of a kind of check valve of the utility model;

Fig. 6 is the plan view that spool is put into valve seat among the embodiment of a kind of check valve of the utility model;

Fig. 7 is the stereogram of pilot sleeve among the embodiment of a kind of check valve of the utility model.

The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.

Embodiment

Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

Referring to figs. 1 through Fig. 7, an embodiment of a kind of check valve of the present utility model is proposed, comprise valve seat 100, spool 200, pilot sleeve 300.The side of valve seat 100 end portions and bottom surface are provided with some through holes 103 equably, and fluid enters the valve seat 100 from through hole 103.Spool 200 is adaptive and be arranged on the opening with the opening of valve seat 100, valve seat 100 internal faces are provided with screw thread, and the outer wall of pilot sleeve 300 lower ends is provided with corresponding adaptive screw thread, pilot sleeve 300 and valve seat 100 are threaded connection fixing, and pilot sleeve 300 upper end open are connected and fixed by the outside thread of internal thread and an output duct.

Spool 200 on 300 pairs of valve seats 100 of pilot sleeve plays guiding, pilot sleeve 300 internal faces are provided with some identical ribs 301 equably, and rib 301 can make spool 200 only move axially in pilot sleeve 300 and can not overturn or move radially.Rib 301 is upper end part 302 and end portion 303 respectively, the thickness of the thickness end portion 303 of upper end part 302 is large, the internal diameter at pilot sleeve 300 inherent rib 301 end portions 303 places is identical with the diameter of spool 200, make spool 200 can move up and down and can not move radially at end portion 303, spool 200 is overturn, and pilot sleeve 300 is less than the diameter of spool 200 at the internal diameter at 302 places, rib 301 upper end parts, stops spool 200 to continue the up opening of mobile and clogging pilot sleeve 300.

Be provided with a chimb 101 in the valve seat 100, chimb 101 is annular nib, chimb 101 is provided with a seal ring 102, the central opening of seal ring 102 and described spool 200 are adaptive, after pilot sleeve 300 is spirally connected with valve seat 100, pilot sleeve 300 is closely fixing with seal ring 102 and chimb 101, makes seal ring 102 reach good sealing effect.Chimbs 101 in valve seat 100 and the valve seat 100 structure that is formed in one is produced easily easy.

Spool 200 is adaptive with the central opening of valve seat 100 inner seal rings 102, and is arranged on the seal ring 102 and with seal ring 102 and fits tightly.By cooperating of valve seat 100 and spool 200, can realize the return-stopping function that makes fluid only flow and stop fluid to flow backwards to a direction.Fluid flows to guiding sleeve 300 directions from valve seat 100, the thrust that spool 200 is subjected to fluid in pilot sleeve 300 up the mobile fluid that makes can up flow and continue to flow toward pilot sleeve 300 outlet ports by spool 200 edges from the valve seat mouth, finally discharge from output duct, and the upper end part 302 of pilot sleeve 300 interior ribs 301 stops spool 200 to continue the up opening of mobile clogging pilot sleeve 300.When fluid stops up to spring up, at the fluid of spool 200 upper ends under the effect of the self gravitation of the pressure of current downflow and spool 200, spool 200 falls back on the seal ring 102 in the valve seat 100 and with seal ring 102 and fits tightly, thereby cut off flowing of spool 200 lower end fluids, then can realize return-stopping function.

When the fluid pressure at the fluid pressure specific output conduit place at valve seat 100 places is powerful, fluid enters in the valve seat 100 and toward the output duct direction from through hole 103 and flows, when fluid up flows in valve seat 100, being positioned over spool 200 on the valve seat 100, to be subject to the thrust of fluid up mobile in pilot sleeve 300, making fluid up flow from the opening of valve seat 100 and to continue past pilot sleeve 300 outlet ports by spool 200 edges flows, finally discharge from output duct, and the upper end part 302 of pilot sleeve 300 interior ribs 301 stops spool 200 to continue the up opening of mobile clogging pilot sleeve 300; When the fluid pressure at valve seat 100 places is powerful unlike the fluid pressure at output duct place, at the fluid of spool 200 upper ends under the effect of the self gravitation of the pressure of current downflow and spool 200, spool 200 falls back on the seal ring 102 in the valve seat 100, thereby cut off flowing of spool 200 lower end fluids, realized the return-stopping function that prevents that fluid from flowing backwards.

Existing spool is solid sphere, because the one-body molded injection moulding of solid sphere out afterwards can be because of expanding with heat and contract with cold, easily be out of shape and surface irregularity in process of production, the general normally use of processing that after production, also needs minimum 2 procedures, manufacture operation more loaded down with trivial details, and solid sphere comparison consume material, improved cost of production; And spool 200 of the present utility model is made of a spherical cap structure 201 and a hollow cylinder 202 adaptive with the opening of spherical cap structure 201 and that be connected, the external diameter of spherical cap structure 201 openings is identical with hollow cylinder 202 external diameters, can be one-body molded during production, save material, simplified simultaneously the production and processing operation of spool.The material of spool 200 can be selected plastic cement, and perhaps the metals such as cast iron, stainless steel and brass can be selected according to actual conditions.Hollow cylinder 202 highly is not less than 1 centimetre, and the whole height of spool 200 is less at least 1 centimetre than the length of the end portion 303 of rib 301 simultaneously; The diameter of spool 200 is not less than 2 centimetres, is generally between 2 centimetres to 20 centimetres; The thickness of spool 200 is not less than 0.3 centimetre, is generally between 0.3 centimetre to 2 centimetres.

The above only is preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure transformation that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.

Claims

1. A check valve, comprising a valve seat, a valve core adapted to the opening of the valve seat and arranged on the opening, a valve core connected with the upper end of the valve seat and guiding the valve core The function of the guide sleeve is characterized in that the valve core is composed of a spherical cap structure and a hollow cylinder that is adapted to and integrated with the opening of the spherical cap structure, and the outer diameter of the spherical cap structure opening is Same as the outer diameter of the hollow cylinder.

2 . The check valve according to claim 1 , wherein the inner wall surface of the valve seat is fixed to the outer wall surface at the lower end of the guide sleeve through threaded connection. 3 .

3. The check valve according to claim 2, characterized in that, the inner wall of the guide sleeve is uniformly provided with a plurality of holes so that the valve core can move axially in the guide sleeve without turning over or moving radially. The same rib that moves, the thickness of the upper end portion of the rib is greater than the thickness of the lower end portion, the inner diameter of the guide sleeve at the lower end portion of the rib is the same as the diameter of the valve core, and the upper end portion of the rib The inner diameter is smaller than the diameter of the spool.

4. The check valve according to claim 3, characterized in that, the valve seat is provided with a flange, and the flange is provided with a sealing ring adapted to the valve core, and the guide sleeve After being screwed with the valve seat, the guide sleeve tightly presses and fixes the sealing ring and the flange.

5. The check valve according to claim 3, wherein the height of the hollow cylinder is not less than 1 cm, and the overall height of the valve core is at least 1 cm shorter than the length of the lower end portion of the rib.

6. The check valve according to claim 1 or 5, characterized in that the diameter of the valve core is not less than 2 cm.

7. The check valve according to claim 6, wherein the thickness of the valve core is not less than 0.3 cm.

8. The check valve according to claim 7, wherein the valve core is made of plastic or metal.

9. The check valve according to claim 1, characterized in that, a number of through holes are uniformly provided on the side and bottom of the lower end of the valve seat.