CN112283416A

CN112283416A - Check valve

Info

Publication number: CN112283416A
Application number: CN202011103840.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Jinan Gaoling Machinery Technology Co ltd
Current assignee: Shandong Dongvalve Refrigeration Technology Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-01-29
Anticipated expiration: 2040-10-15
Also published as: CN112283416B

Abstract

The present invention relates to a check valve comprising: the valve comprises a valve body, a valve cover, a valve seat and a valve clack, wherein a first connecting sleeve is arranged on the valve cover, a screw rod assembly with special-shaped threads is rotatably arranged in the first connecting sleeve, the valve clack is provided with a second connecting sleeve, the second connecting sleeve is sleeved outside the first connecting sleeve and can slide along the extending direction of the first connecting sleeve, a connecting cavity is formed in the second connecting sleeve, a clamping piece is arranged in the connecting cavity, an elastic piece is arranged between the clamping piece and the left side wall of the connecting cavity, the clamping piece is clamped in the special-shaped threads, when the clamping piece moves downwards, the clamping piece can be abutted against the special-shaped threads to drive the screw rod assembly to rotate, when the clamping piece moves upwards, the special-shaped threads can push the clamping piece to move in the direction away from the rotating rod and extrude the elastic piece, thereby disengaging the clamping with the special-shaped thread.

Description

Check valve

Technical Field

The invention relates to the technical field of valves, in particular to a check valve.

Background

The check valve is a valve commonly used in a pipeline system and used for connecting and stopping a fluid medium in the pipeline system, the lift check valve refers to a valve which automatically opens and closes a valve flap by the flow of the medium itself and is used for preventing the medium from flowing backwards, and the existing lift check valve mainly comprises: the valve body, the disk seat, the valve clack, uide bushing and valve gap, be equipped with the inlet flow way in the valve body, export flow way and lumen, be equipped with the disk seat at the inlet flow way exit end, the disk seat upper end is equipped with the disk seat sealed face, the valve gap is installed in valve body middle part upper end, uide bushing upper end fixed mounting is between valve body and valve gap, the uide bushing lower extreme stretches into the lumen, the valve clack sets up inside the uide bushing, the valve clack excircle forms upper and lower direction with the uide bushing inner wall, the valve clack lower extreme is equipped with can form with the disk seat sealed face and opens, the valve clack sealed face of closing the valve, the uide bushing upper end is equipped with: the valve clack is opening the in-process, and when valve import side medium was interrupted suddenly, the valve clack is closed downwards fast under the effect of valve outlet side medium, and the valve clack sealing surface forms a great impact force to the sealed face of valve seat for the sealed face of valve clack receives destruction easily with the sealed face of valve seat, influences life, and the noise is big simultaneously.

Disclosure of Invention

In view of the above, it is necessary to provide a check valve that has a long service life and low noise, in which when the medium on the inlet side of the valve is suddenly interrupted, the valve flap is slowly closed downward so that the impact force of the sealing surface of the valve flap against the sealing surface of the valve seat is small.

The invention discloses a check valve, which comprises: the valve comprises a valve body and a valve cover arranged at the upper end of the middle part of the valve body, wherein an inlet flow passage, a middle cavity and an outlet flow passage are arranged in the valve body, a valve seat is arranged at the outlet end of the inlet flow passage in the valve body, a fluid passage communicated with the inlet flow passage is arranged on the valve seat, a valve clack matched with the valve seat is arranged in the valve body, a first connecting sleeve extending into the middle cavity is arranged at the upper side of the valve cover along the vertical direction, a screw rod component is rotatably arranged in the first connecting sleeve, a special-shaped thread is arranged on the screw rod component, the valve clack is provided with a second connecting sleeve, the second connecting sleeve is sleeved outside the first connecting sleeve and can slide along the extending direction of the first connecting sleeve, a connecting groove is arranged on the first connecting sleeve along the vertical direction, and a connecting cavity is, connect the intracavity and slide and be provided with joint spare, joint spare with be provided with the elastic component between the left side wall in connection chamber, joint spare joint in special-shaped screw thread works as when joint spare moves down, joint spare can the butt in special-shaped screw thread drives the hob subassembly is rotatory, works as during joint spare rebound, special-shaped screw thread can promote joint spare is to keeping away from rotary rod direction removes to extrude the elastic component, thereby break away from with special-shaped screw thread's joint.

In one embodiment, the valve cover is provided with an accommodating cavity therein, the screw rod assembly comprises a screw rod piece and a rotary table fixedly connected to the upper end of the screw rod piece, the special-shaped thread is arranged on the screw rod piece, the rotary table is arranged in the accommodating cavity, the lower side of the rotary table abuts against the lower side surface of the accommodating cavity, and the screw rod piece penetrates through the valve cover and is centrally connected with the rotary table.

In one embodiment, a first friction disc is arranged on the rotating disc, a second friction disc is arranged in the accommodating cavity, and the first friction disc is tightly attached to the second friction disc.

In one embodiment, an elastic ring is arranged between the second friction disc and the upper side wall of the accommodating cavity.

In one embodiment, the valve cover includes a first cover body and a second cover body, the first cover body and the second cover body are fixedly connected, an accommodating cavity is formed between the first cover body and the second cover body, and the screw rod penetrates through the second cover body.

In one embodiment, the second connecting sleeve is provided with a communicating hole, and the communicating hole is communicated with two sides of the second connecting sleeve.

The invention has the advantages that: the check valve has the advantages that the spiral rod assembly is arranged, so that the impact force of the valve clack on the valve seat when the valve clack is closed can be effectively reduced, further, the resistance of the valve clack when the valve clack descends can be improved by arranging the first friction disk and the second friction disk, the impact of the sealing surface between the valve clack and the valve seat can be further relieved, and the service life of the check valve is prolonged.

Drawings

FIG. 1 is a cross-sectional view of a check valve provided in accordance with the present invention;

FIG. 2 is a cross-sectional view of a check valve according to the present invention, in which a screw structure is shown in cross-section;

FIG. 3 is a cross-sectional view of another operational state of a check valve provided in accordance with the present invention;

fig. 4 to 6 are perspective views illustrating partial structures of screw members of a check valve according to the present invention.

In the figure, a valve body 1, an inlet flow passage 11, a middle chamber 12, an outlet flow passage 13, a first connecting sleeve 23, a connecting groove 231, an accommodating chamber 24, a first cover body 21, a second cover body 22, a valve seat 3, a fluid passage 31, a valve clack 4, a second connecting sleeve 41, a connecting chamber 411, a clamping piece 412, an elastic piece 413, a communication hole 414, a screw rod piece 51, a special-shaped thread 511, a rotating disc 52, a first friction disc 53, a second friction disc 54 and an elastic ring 55 are arranged.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 3, the present invention discloses a check valve, which includes: the valve comprises a valve body 1 and a valve cover arranged at the upper end of the middle part of the valve body 1, wherein an inlet flow passage 11, a middle cavity 12 and an outlet flow passage 13 are arranged in the valve body 1, a valve seat 3 is arranged at the outlet end of the inlet flow passage 11 in the valve body 1, a fluid passage 31 communicated with the inlet flow passage 11 is arranged on the valve seat 3, a valve flap 4 matched with the valve seat 3 is arranged in the valve body 1, a first connecting sleeve 23 extending into the middle cavity 12 is arranged on the upper side of the valve cover along the vertical direction, a screw rod component is arranged in the first connecting sleeve 23 in a rotatable manner, a special-shaped thread 511 is arranged on the screw rod component, the valve flap 4 is provided with a second connecting sleeve 41, the second connecting sleeve 41 is sleeved outside the first connecting sleeve 23 and can slide along the extending direction of the first connecting sleeve 23, a connecting groove 231 is arranged on the first connecting sleeve 23 along the, seted up connection chamber 411 on the second adapter sleeve 41, it is provided with joint piece 412 to slide in connection chamber 411, joint piece 412 with be provided with elastic component 413 between the left side wall of connection chamber 411, joint piece 412 the joint in special-shaped screw 511 works as when joint piece 412 is the lapse, joint piece 412 can butt in special-shaped screw 511 drives the hob subassembly is rotatory, works as during joint piece 412 the rebound, special-shaped screw 511 can promote joint piece 412 is to keeping away from the hob subassembly direction removes to extrude elastic component 413, thereby break away from with special-shaped screw 511's joint.

With reference to fig. 2 and 4 to 6, the upper surface of the special-shaped thread 511 is a vertical surface, and the lower surface is an inclined surface, when the clamping member 412 moves downward from the top, the clamping member 412 can abut against the upper surface of the special-shaped thread 511, so as to drive the screw rod assembly to rotate, when the clamping member 412 moves upward from the bottom, the lower surface of the special-shaped thread 511 can push the clamping member 412 to extrude the elastic member 413, so as to separate from the clamping with the special-shaped thread 511.

Preferably, the valve cover is internally provided with an accommodating cavity 24, the screw rod assembly comprises a screw rod member 51 and a rotary disc 52 fixedly connected to the upper end of the screw rod member 51, the special-shaped thread 511 is arranged on the screw rod member 51, the rotary disc 52 is arranged in the accommodating cavity 24, the lower side of the rotary disc 52 abuts against the lower side surface of the accommodating cavity 24, and the screw rod member 51 passes through the valve cover and is centrally connected with the rotary disc 52.

Preferably, a first friction disk 53 is disposed on the rotating disk 52, a second friction disk 54 is disposed in the receiving cavity 24, and the first friction disk 53 is tightly attached to the second friction disk 54.

It will be appreciated that the first friction disc 53 is in close contact with the second friction disc 54, such that the screw member 51, when driving the first friction disc 53 to rotate, is subject to the resistance of the second friction disc 54.

Preferably, an elastic ring 55 is disposed between the second friction disc 54 and the upper side wall of the receiving cavity 24.

It will be appreciated that the provision of the resilient ring 55 enables the second friction disc 54 to be pre-tensioned against the first friction disc 53.

Preferably, the valve cover includes a first cover body 21 and a second cover body 22, the first cover body 21 is fixedly connected to the second cover body 22, an accommodating cavity 24 is formed between the first cover body 21 and the second cover body 22, and the screw rod passes through the second cover body 22.

Preferably, a communication hole 414 is formed in the second connection sleeve 41, and the communication hole 414 communicates with two sides of the second connection sleeve 41.

The working mode of the invention is as follows:

when a medium flows in from the inlet channel 11, the valve flap 4 moves upward, and at this time, the clamping member 412 abuts against the lower side inclined surface of the special-shaped thread 511, so as to move in a direction away from the screw member 51 and press the elastic member 413, so that the valve flap 4 smoothly moves upward, and the resistance is small.

When the medium in the inlet flow channel 11 is suddenly interrupted, the valve flap 4 moves downward under the impact force generated by the self-gravity, the medium pressure in the outlet flow channel 13 and the backflow, and at this time, the clamping member 412 is clamped on the upper side surface of the special-shaped thread 511, and can drive the screw rod member 51 to rotate, and drive the first friction disc 53 and the second friction disc 54 to move relatively, so that the valve flap 4 is subjected to a large resistance when moving downward, and the moving speed of the valve flap 4 is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A check valve, said check valve comprising: the valve comprises a valve body and a valve cover arranged at the upper end of the middle part of the valve body, wherein an inlet flow passage, a middle cavity and an outlet flow passage are arranged in the valve body, a valve seat is arranged at the outlet end of the inlet flow passage in the valve body, a fluid passage communicated with the inlet flow passage is arranged on the valve seat, a valve clack matched with the valve seat is arranged in the valve body, a first connecting sleeve extending into the middle cavity is arranged at the upper side of the valve cover along the vertical direction, a screw rod component is rotatably arranged in the first connecting sleeve, a special-shaped thread is arranged on the screw rod component, the valve clack is provided with a second connecting sleeve, the second connecting sleeve is sleeved outside the first connecting sleeve and can slide along the extending direction of the first connecting sleeve, a connecting groove is arranged on the first connecting sleeve along the vertical direction, and a connecting cavity is, connect the intracavity and slide and be provided with joint spare, joint spare with be provided with the elastic component between the left side wall in connection chamber, joint spare joint in special-shaped screw thread works as when joint spare moves down, joint spare can the butt in special-shaped screw thread drives the hob subassembly is rotatory, works as during joint spare rebound, special-shaped screw thread can promote joint spare is to keeping away from rotary rod direction removes to extrude the elastic component, thereby break away from with special-shaped screw thread's joint.

2. The check valve of claim 1, wherein the valve cover has a receiving cavity therein, the screw assembly includes a screw member, and a rotary disc fixedly connected to an upper end of the screw member, the thread is disposed on the screw member, the rotary disc is disposed in the receiving cavity, and a lower side of the rotary disc abuts against a lower side of the receiving cavity, and the screw member passes through the valve cover and is centrally connected to the rotary disc.

3. The check valve of claim 2, wherein a first friction disk is disposed on said rotating disk, and a second friction disk is disposed in said receiving cavity, said first friction disk and said second friction disk being in close contact.

4. The check valve of claim 3, wherein an elastomeric ring is disposed between the second friction disk and an upper sidewall of the receiving cavity.

5. The check valve of claim 2, wherein the valve cover comprises a first cover body and a second cover body, the first cover body and the second cover body are fixedly connected, an accommodating cavity is formed between the first cover body and the second cover body, and the screw rod penetrates through the second cover body.

6. The check valve according to claim 1, wherein a communication hole is formed on the second connecting sleeve, and the communication hole communicates with two sides of the second connecting sleeve.