CN211901695U

CN211901695U - Check valve

Info

Publication number: CN211901695U
Application number: CN202020252238.4U
Authority: CN
Inventors: 郭庆; 凃士雄; 凃志兴
Original assignee: Jpe Yean Hern Co ltd
Current assignee: Jpe Yean Hern Co ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-11-10
Anticipated expiration: 2030-03-04

Abstract

The utility model relates to a check valve, including valve body and contrary function portion that ends. A first flow through hole and a second flow through hole are respectively arranged on two sides of the valve body, and an accommodating cavity is arranged in the valve body. The non-return functional part is arranged in the containing cavity. The non-return function part comprises a valve sleeve, a valve core, a propping part and an elastic part. The valve sleeve is provided with a third flow through hole which is always communicated with the first flow through hole. A flow guide cavity is arranged in the valve core, and a fourth circulation hole communicated with the flow guide cavity is arranged around the side wall of the valve core. The top leaning piece is provided with a fifth through hole for communicating the second through hole and the fourth through hole. The propping piece is sleeved in the flow guide cavity and is propped and supported by the elastic piece. The valve core also leans against the valve sleeve under the action of the propping piece and blocks a third through hole on the valve core. Therefore, the balance of self stress of the valve core under the action of the reverse fluid is effectively ensured, and the valve core is ensured to have good sealing performance relative to the valve sleeve.

Description

Check valve

Technical Field

The utility model relates to a valve manufacturing technical field especially relates to a check valve.

Background

The purpose of the check valve is to allow the medium to flow in one direction only and to prevent the medium from flowing in the opposite direction. In a conventional check valve, the valve core is sealed with respect to the valve housing by means of an elastic restoring force of a spring (as shown in fig. 1). When the fluid flows along the positive direction, the fluid applies a thrust to the end surface of the valve core, and when the thrust is greater than the elastic restoring force of the spring, the valve core performs translational motion along the self axial direction, so that the flow passage is opened. When the fluid flows along the reverse direction, the valve core compresses and seals the valve body under the combined action of the elastic restoring force of the spring and the fluid pressure. However, in order to ensure a better opening sensitivity of the check valve, the stiffness coefficient of the spring must be limited, which causes poor reverse sealing performance of the check valve, and is very likely to cause a fluid leakage phenomenon, especially when the pressure fluctuation value of the fluid is large. Thus, a skilled person is urgently needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a structural design is simple, opens sensitivity height, and the better check valve of reverse leakproofness.

In order to solve the technical problem, the utility model relates to a check valve, it includes valve body and contrary function portion that ends. The left side and the right side of the valve body are respectively provided with a first flow through hole and a second flow through hole, and an accommodating cavity is arranged in the first flow through hole and the second flow through hole. The non-return function part is arranged in the containing cavity and is used for communicating/blocking the first flow through hole and the second flow through hole. The non-return function part comprises a valve sleeve, a valve core, a propping part and an elastic part. The valve sleeve is fixed in the accommodating cavity and arranged on the left side of the valve core. And a third flow through hole which is always communicated with the first flow through hole is formed around the central axis of the valve sleeve. A flow guide cavity extends inwards along the right end surface of the valve core, and a fourth circulation hole communicated with the flow guide cavity is formed around the side wall of the valve core. And a fifth circulation hole communicated with the second circulation hole and the fourth circulation hole is formed in the abutting piece along the axial direction of the abutting piece. The propping piece is sleeved in the flow guide cavity and is propped and supported by the elastic piece. Meanwhile, the valve core is propped against the valve sleeve under the action of the propping piece, and the third flow through hole is blocked.

As the utility model discloses technical scheme's further improvement, along from left to right direction, the aperture of third flow through hole crescent, correspondingly, is provided with toper cooperation section at the left end portion of case.

As a further improvement of the technical scheme of the utility model, the taper of the taper matching section is preferably controlled to be 1:15-1: 10.

As a further improvement of the technical proposal of the utility model, the valve body comprises a first valve split body and a second valve split body. The first through hole is formed on a body separated from the first valve. The second flow hole is opened in the second valve body. The first valve body and the second valve body are mutually inserted and connected to form the accommodating cavity together.

As the utility model discloses technical scheme's further improvement, first valve components of a whole that can function independently and second valve components of a whole that can function independently close with the help of the screw thread is vice soon to be connected, wherein, is provided with the external screw thread on the lateral wall of second valve components of a whole that can function independently, correspondingly, sets up the internal thread with above-mentioned external screw thread looks adaptation in the corresponding position of first valve components of a whole that can function independently.

Compare in the check valve of traditional project organization, in the utility model discloses a technical scheme, additionally add the top and lean on the piece, and it slides along the inner chamber of case under the effect of elastic component elastic restoring force and medium fluid pressure to reduce the influence of fluid pressure fluctuation to case self relative position stability effectively, and guaranteed the case and received the equilibrium of its self atress when reverse fluid acts on, avoided it to take place instantaneous biasing phenomenon, and then guaranteed that the case has good leakproofness for the valve barrel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a check valve in the prior art.

Fig. 2 is a schematic perspective view of the check valve of the present invention.

Fig. 3 is a front view of fig. 2.

Fig. 4 is a sectional view a-a of fig. 3.

Fig. 5 is a schematic structural diagram of a valve sleeve in the check valve of the present invention.

Fig. 6 is a schematic structural diagram of the valve element in the check valve of the present invention.

Fig. 7 is a schematic structural view of the abutting member in the check valve of the present invention.

1-a valve body; 11-a first valve split; 111-a first flow through hole; 112-internal thread; 12-a second valve split; 121-a second flow through hole; 122-external threads; 13-a containment chamber; 2-a non-return functional part; 21-a valve housing; 211-third flow through hole; 22-a valve core; 221-a flow guide cavity; 222-a fourth flow-through hole; 223-a tapered mating section; 23-a top-rest member; 231-fifth flow-through hole; 24-cylindrical spring.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings only for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The technical solution disclosed in the present invention is explained below with reference to an example, and fig. 2, fig. 3, and fig. 4 respectively show a schematic perspective view, a front view, and a-a sectional view of the check valve of the present invention, and it can be seen that the check valve mainly comprises a valve body 1 and a check function portion 2. In view of the convenience of the manufacturing process and the insertion of the non-return function portion 2, the valve body 1 is preferably of a split design, specifically as follows: the valve body 1 is formed by mutually inserting and connecting a first valve body 11 and a second valve body 12, and together forms an accommodating cavity 13 for accommodating the non-return function part 2. A first flow hole 111 is extended rightward from the left side wall of the first valve division body 11; a second flow hole 121 extends leftward from the right side wall of the second valve body 12. The check function portion 2 is used to communicate/block the first flow-through hole 111 and the second flow-through hole 121. The check function portion 2 includes a valve sleeve 21, a valve core 22, an abutting member 23, and a columnar spring 24. The valve housing 21 is fixed in the accommodation chamber 13 and disposed on the left side of the spool 22. A third flow hole 211 (shown in fig. 5) is opened around the central axis of the valve housing 21 to be always communicated with the first flow hole 111. A guide chamber 221 extends inward along the right end surface of the valve core 22, and a fourth flow hole 222 (shown in fig. 6) communicating with the guide chamber 221 is formed around the sidewall thereof. A fifth flow hole 231 (shown in fig. 7) is formed in the abutting member 23 along the axial direction thereof and communicates with the second flow hole 121 and the fourth flow hole 222. The propping member 23 is sleeved in the diversion cavity 221 and is propped and supported by the cylindrical spring 24. At the same time, the valve core 22 abuts against the valve sleeve 21 by the abutting piece 23, and blocks the third flow through hole 211. Therefore, the influence of the fluid pressure fluctuation on the stability of the relative position of the valve core 22 is effectively reduced, the self stress balance of the valve core 22 under the action of the reverse fluid is ensured, the transient bias phenomenon is avoided, and the valve core 22 is ensured to have good sealing performance relative to the valve sleeve 21.

Two points need to be explained here: 1) in order to ensure the directionality of the axial movement of the spool 22 and thus ensure the reverse sealing performance of the check valve, in the actual manufacturing process, the radial clearance between the spool 22 and the accommodating chamber 13 needs to be strictly controlled, and generally, is not more than 0.5 mm; 2) the elastic member for providing elastic restoring force to the valve core may be an elastic rubber sleeve, instead of the above-mentioned cylindrical spring 21.

Further, as can be seen from fig. 1, in the prior art, the valve core and the valve sleeve are in a linear sealing state, and when the relative position of the valve core is slightly deviated, a leakage phenomenon inevitably occurs, thereby causing a failure of reverse sealing of the check valve. In view of this, as a further optimization of the above technical solution, the aperture of the third through-flow hole 211 gradually increases along the left-to-right direction, and correspondingly, a tapered fitting section 223 is provided at the left end portion of the spool 22. Thus, the valve body 22 is in a surface-fitted sealing state with respect to the valve sleeve 21, and the sealing reliability of the check valve is effectively improved.

Generally, the taper of the tapered fitting section 223 is preferably controlled to be 1:15-1:10, as verified by a lot of experimental data, in view of ensuring the actual sealing effect.

Furthermore, the first valve body 11 and the second valve body 12 are preferably screwed together by means of a screw pair, so that the assembly and disassembly processes of the two are more efficient, the manufacturing and molding are facilitated, and the production cost is lower. The specific recommended scheme is as follows: the outer side wall of the second valve sub-body 12 is provided with an external thread 122, and correspondingly, the corresponding position of the first valve sub-body 11 is provided with an internal thread 112 matched with the external thread 122.

Finally, the thread pair may be preferably a sealing pipe thread pair according to practical situations in order to ensure the overall sealing performance of the check valve.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A check valve comprises a valve body and a check function part; the left side and the right side of the valve body are respectively provided with a first flow through hole and a second flow through hole, and accommodating cavities are arranged in the first flow through hole and the second flow through hole; the non-return function part is arranged in the containing cavity and is used for communicating/blocking the first flow through hole and the second flow through hole, and the non-return function part is characterized by comprising a valve sleeve, a valve core, a propping piece and an elastic piece; the valve sleeve is fixed in the accommodating cavity and is arranged on the left side of the valve core; a third flow through hole which is communicated with the first flow through hole all the time is formed around the central axis of the valve sleeve; a flow guide cavity extends inwards along the right end surface of the valve core, and a fourth circulation hole communicated with the flow guide cavity is formed around the side wall of the flow guide cavity; a fifth circulation hole communicated with the second circulation hole and the fourth circulation hole is formed in the abutting piece along the axial direction of the abutting piece; the propping piece is sleeved in the flow guide cavity and is propped and supported by the elastic piece; meanwhile, the valve core is abutted against the valve sleeve under the action of the abutting piece, and the third through hole is sealed.

2. The check valve of claim 1, wherein the third flow passage has a gradually increasing diameter along a left-to-right direction, and a tapered fitting section is correspondingly provided at a left end portion of the spool.

3. The check valve of claim 2, wherein the taper of the tapered mating section is controlled to be 1:15 to 1: 10.

4. The check valve of any of claims 1-3, wherein the valve body comprises a first valve body and a second valve body; the first flow through hole is formed on a part which is separated from the first valve; the second flow through hole is formed in the second valve body; the first valve split body and the second valve split body are mutually inserted and connected to form the accommodating cavity together.

5. The check valve of claim 4, wherein the first valve body and the second valve body are screwed together by means of a screw pair, wherein an external thread is provided on an outer sidewall of the second valve body, and an internal thread adapted to the external thread is correspondingly provided at a corresponding position of the first valve body.