CN210318665U

CN210318665U - Butterfly check valve

Info

Publication number: CN210318665U
Application number: CN201921184151.1U
Authority: CN
Inventors: 陈永裁; 陈永煌; 项秀莲; 王志欢; 宋冯欢
Original assignee: China Kist Valve Group Co ltd
Current assignee: China Kist Valve Group Co ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-04-14
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a butterfly check valve, in particular to the technical field of check valves, and the butterfly check valve comprises a valve body, wherein sealing bearings are fixedly arranged on the outer side walls of the valve body along the radial direction, and valve rods are sleeved in the sealing bearings, two valve rods penetrate through the sealing bearings, and a fixed seat is sleeved at one end part positioned in the valve body, and the side wall of one side of the two fixed seats is welded with the same butterfly plate; the valve body has first check plate and second check plate along the both sides inside wall welding respectively of vertical direction, first check plate and second check plate are close to one side lateral wall of butterfly plate respectively and all set up flutedly, the butterfly plate is close to one side lateral wall of two recesses respectively and all welds and has multi-level sealed piece. The utility model discloses compare in the recess of the first check plate one side of the elastic seal structure between traditional butterfly plate and the disk seat and make its sealed face be line contact with the multi-level sealed piece looks interference fit of butterfly plate one side, sealing performance is better and high temperature resistant effectual.

Description

Butterfly check valve

Technical Field

The utility model relates to a check valve technical field, more specifically say, the utility model relates to a butterfly check valve.

Background

The check valve is a valve with a round valve clack and acts by self weight and medium pressure to block the medium from flowing backwards; the medium valve belongs to the automatic valve class, also called check valve, reflux valve or isolating valve, the working principle is that the medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side), when the inlet pressure is larger than the sum of the weight of the valve clack and the flow resistance thereof, the valve is opened; on the contrary, the valve is closed when the medium flows backwards; the check valve is commonly used as a bottom valve of a water pumping device and can prevent the backflow of water.

The butterfly valve has the advantages that the center of the body of the structure of the center butterfly valve is located at the same position, the butterfly valve is simple in structure and convenient to manufacture, the sealing performance of the butterfly valve can be affected because the butterfly plate and the valve seat are always in an extruding and scraping state, meanwhile, the sealing surface of the butterfly plate and the valve seat is in line contact, the sealing effect is generated by elastic deformation caused by extruding the valve seat through the butterfly plate, and the valve seat is basically made of elastic materials such as rubber or polytetrafluoroethylene and is limited by temperature in use.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's above-mentioned defect, the embodiment of the utility model provides a butterfly check valve, compare in the elastic sealing structure between traditional butterfly plate and the disk seat, it is multi-level sealed piece and first through setting up, two check plates, make the recess of first check plate one side and the multi-level sealed piece looks interference fit of butterfly plate one side, first check plate, second check plate and multi-level sealed piece all contain the rolling formation of 0.6% medium carbon steel of carbon content, high temperature resistant is effectual, the temperature of the medium of adaptable difference, simultaneously sealed face between butterfly plate and the first check plate is the line contact, sealing performance is better.

In order to achieve the above object, the utility model provides a following technical scheme: a butterfly check valve comprises a valve body, wherein sealing bearings are fixedly mounted on the outer side walls of two sides of the valve body along the radial direction, valve rods are sleeved in the valve body, the two valve rods penetrate through the sealing bearings, a fixed seat is sleeved at one end part of each valve rod, the end part of each valve rod is positioned in the valve body, and the same butterfly plate is welded on the side wall of one side of each fixed seat;

the valve body has first check plate and second check plate along the both sides inside wall welding respectively of vertical direction, first check plate and second check plate are close to one side lateral wall of butterfly plate respectively and all set up flutedly, the butterfly plate is close to one side lateral wall of two recesses respectively and all welds and has multi-level sealed piece.

In a preferred embodiment, one of the valve rods penetrates through the sealing bearing and is fixedly provided with a crank at one end of the outer side wall of the valve body, one end of the crank is hinged with a piston rod, and the bottom end of the piston rod is sleeved with an air cylinder.

In a preferred embodiment, the valve body is provided with mounting holes uniformly distributed along the outer side walls of two sides in the horizontal direction, and the bottom end of the valve body is welded with a base.

In a preferred embodiment, the groove is in accordance with the shape of the multi-layer sealing block, and the outer surface of the multi-layer sealing block is in interference fit with the inner side wall of the groove.

In a preferred embodiment, the first check plate, the second check plate and the multi-level sealing block are all rolled from medium carbon steel with a carbon content of 0.6%.

In a preferred embodiment, the first check plate and the second check plate are consistent in structure and are arranged in a central symmetry mode about the circle center of the butterfly plate.

In a preferred embodiment, the outer surface of the top end of the valve body is provided with an access opening along the vertical central axis thereof, and an access structure is fixedly mounted on the outer surface of the valve body close to the access opening.

In a preferred embodiment, the maintenance structure includes mount pad, sealing strip and convex lens, the mount pad passes through bolt fixed mounting and is close to access hole department in the top surface of valve body, the top of mount pad is inlayed and is equipped with convex lens, and the mount pad is equipped with the sealing strip with the junction at the convex lens along the both ends of horizontal direction.

The utility model discloses a technological effect and advantage:

1. compared with the traditional elastic sealing structure between the butterfly plate and the valve seat, the utility model has the advantages that the groove on one side of the first check plate is in interference fit with the multi-layer sealing blocks on one side of the butterfly plate through the multi-layer sealing blocks, the first check plate, the second check plate and the multi-layer sealing blocks are formed by rolling medium carbon steel with the carbon content of 0.6 percent, the high temperature resistant effect is good, the temperature of different media can be adapted, meanwhile, the sealing surface between the butterfly plate and the first check plate is in line contact, and the sealing performance is better;

2. the utility model discloses the maintenance structure that sets up, the maintenance structure is located between butterfly board and first check plate and the second check plate simultaneously, is in the most critical structural position of butterfly check valve, when observing, because the maintenance structure is that the mount pad, sealing strip and convex lens constitute jointly, and seal through the sealing strip between convex lens and the mount pad, be difficult for the infiltration, through utilizing convex lens to carry out the inspection effect in access hole department, convex lens has the effect of enlargeing the object image and can make things convenient for staff's maintenance work.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is an enlarged view of the structure at B in fig. 3.

Fig. 5 is an enlarged view of the structure at C in fig. 3.

The reference signs are: 1. a valve body; 2. a base; 3. sealing the bearing; 4. a valve stem; 5. a crank; 6. a piston rod; 7. a cylinder; 8. overhauling the structure; 801. a mounting seat; 802. a sealing strip; 803. a convex lens; 9. mounting holes; 10. a fixed seat; 11. a butterfly plate; 12. a first check plate; 13. a second check plate; 14. a groove; 15. a multi-layer sealing block; 16. and (6) an access hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The butterfly check valve shown in fig. 1-4 comprises a valve body 1, wherein sealing bearings 3 are fixedly mounted on the outer side walls of the valve body 1 along the radial direction, valve rods 4 are sleeved in the sealing bearings 3, fixing seats 10 are sleeved at the end parts of the two valve rods 4, which penetrate through the sealing bearings 3 and are located in the valve body 1, and the same butterfly plate 11 is welded on the side wall of one side of each of the two fixing seats 10;

a first check plate 12 and a second check plate 13 are respectively welded on the inner side walls of two sides of the valve body 1 along the vertical direction, grooves 14 are respectively formed in the outer side walls of the first check plate 12 and the second check plate 13, which are close to one side of the butterfly plate 11, respectively, and a multi-layer sealing block 15 is welded on the outer side walls of the butterfly plate 11, which are close to one side of the two grooves 14, respectively;

one valve rod 4 penetrates through the sealing bearing 3, a crank 5 is fixedly arranged at one end of the outer side wall of the valve body 1, one end of the crank 5 is hinged with a piston rod 6, and the bottom end of the piston rod 6 is sleeved with an air cylinder 7;

the outer side walls of two sides of the valve body 1 along the horizontal direction are provided with uniformly distributed mounting holes 9, and the bottom end of the valve body 1 is welded with a base 2;

the shape of the groove 14 is consistent with that of the multi-layer sealing block 15, and the outer surface of the multi-layer sealing block 15 is in interference fit with the inner side wall of the groove 14;

the first check plate 12, the second check plate 13 and the multi-layer sealing block 15 are all formed by rolling medium carbon steel with the carbon content of 0.6%;

the first check plate 12 and the second check plate 13 are consistent in structure and are arranged in a central symmetry manner about the center of the butterfly plate 11.

The implementation mode is specifically as follows: when the butterfly check valve is used, a medium flows in from an inlet end (lower side) and flows out from an outlet end (upper side), and when the inlet pressure is larger than the sum of the weight of the butterfly plate 11 and the flow resistance thereof, the valve is opened; namely, the embedded structure between the multi-layer sealing block 15 and the groove 14 between the bottom end of the butterfly plate 11 and the first check plate 12 is released, the valve is opened, the pressure of the medium at the inlet end is reduced, when the medium flows backwards, the pressure on the butterfly plate 11 is reduced, at the moment, the air cylinder 7 is opened, the valve rod 4 sleeved on the fixed seat 10 at one side of the butterfly plate 11 penetrates through the crank 5 connected with one end of the sealing bearing 3, the piston rod 6 is driven by the air cylinder 7 to slowly rotate to ensure the reset of the butterfly plate 11, then the groove 14 at one side of the first check plate 12 is ensured to be in interference fit with the multi-layer sealing block 15 at one side of the butterfly plate 11, the first check plate 12, the second check plate 13 and the multi-layer sealing block 15 are all made of medium carbon steel with the carbon content of 0.6 percent, the high temperature resistant effect is good, the temperature of different media can be adapted, and simultaneously, the sealing surface between the butterfly plate 11 and, the sealing performance is better.

According to the butterfly check valve shown in fig. 1 and 5, an access hole 16 is formed in the outer surface of the top end of the valve body 1 along the vertical central axis of the valve body, and an access structure 8 is fixedly mounted on the outer surface of the valve body 1, which is close to the access hole 16;

the maintenance structure 8 includes mount pad 801, sealing strip 802 and convex lens 803, the top surface that the mount pad 801 passes through bolt fixed mounting in valve body 1 is close to access hole 16 department, the top of mount pad 801 is inlayed and is equipped with convex lens 803, and the junction at mount pad 801 and convex lens 803 along the both ends of horizontal direction is equipped with sealing strip 802.

The implementation mode is specifically as follows: the outside of the access hole 16 that the top surface of valve body 1 was seted up has maintenance structure 8 through bolt fixed mounting, maintenance structure 8 is located between butterfly 11 and first check plate 12 and the second check plate 13 simultaneously, be in the most critical structural position of butterfly check valve, when observing, because maintenance structure 8 is mount pad 801, sealing strip 802 and convex lens 803 constitute jointly, and seal through sealing strip 802 between convex lens 803 and the mount pad 801, be difficult for the infiltration, through utilizing convex lens 803 to inspect the effect in access hole 16 department, convex lens 803 has the effect of enlarging the object image and can make things convenient for staff's maintenance work.

The utility model discloses the theory of operation: when the butterfly check valve is used, a medium flows in from an inlet end (lower side) and flows out from an outlet end (upper side), and when the inlet pressure is larger than the sum of the weight of the butterfly plate 11 and the flow resistance thereof, the valve is opened; namely, the embedded structure between the multi-layer sealing block 15 and the groove 14 between the bottom end of the butterfly plate 11 and the first check plate 12 is released, the valve is opened, the pressure of the medium at the inlet end is reduced, when the medium flows backwards, the pressure on the butterfly plate 11 is reduced, at the moment, the air cylinder 7 is opened, the valve rod 4 sleeved on the fixed seat 10 at one side of the butterfly plate 11 penetrates through the crank 5 connected with one end of the sealing bearing 3, the piston rod 6 is driven by the air cylinder 7 to slowly rotate to ensure the reset of the butterfly plate 11, then the groove 14 at one side of the first check plate 12 is ensured to be in interference fit with the multi-layer sealing block 15 at one side of the butterfly plate 11, the first check plate 12, the second check plate 13 and the multi-layer sealing block 15 are all made of medium carbon steel with the carbon content of 0.6 percent by rolling, the high temperature resistant effect is good, the temperature of different media can be adapted, and simultaneously, the sealing surface contact is adopted between, the sealing performance is better.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A butterfly check valve comprising a valve body (1), characterized in that: the valve body (1) is fixedly provided with sealing bearings (3) along the outer side walls of two radial sides, valve rods (4) are sleeved in the sealing bearings (3), the two valve rods (4) penetrate through the sealing bearings (3), one end part of each valve rod, which is positioned in the valve body (1), is sleeved with a fixed seat (10), and the side wall of one side of each fixed seat (10) is welded with a same butterfly plate (11);

valve body (1) has welded first check plate (12) and second check plate (13) respectively along the both sides inside wall of vertical direction, one side lateral wall that first check plate (12) and second check plate (13) are close to butterfly plate (11) respectively all sets up fluted (14), one side lateral wall that butterfly plate (11) are close to two recesses (14) respectively all welds and has multi-level sealing block (15).

2. A butterfly check valve in accordance with claim 1, wherein: one of them valve rod (4) run through sealed bearing (3) and are located the one end fixed mounting of valve body (1) lateral wall crank (5), the one end of crank (5) articulates there is piston rod (6), cylinder (7) have been cup jointed to the bottom of piston rod (6).

3. A butterfly check valve in accordance with claim 1, wherein: the valve body (1) is provided with uniformly distributed mounting holes (9) along the outer side walls of two sides in the horizontal direction, and the base (2) is welded at the bottom end of the valve body (1).

4. A butterfly check valve in accordance with claim 1, wherein: the shape of the groove (14) is consistent with that of the multi-layer sealing block (15), and the outer surface of the multi-layer sealing block (15) is in interference fit with the inner side wall of the groove (14).

5. A butterfly check valve in accordance with claim 1, wherein: the first check plate (12), the second check plate (13) and the multi-layer sealing block (15) are all formed by rolling medium carbon steel with the carbon content of 0.6%.

6. A butterfly check valve in accordance with claim 1, wherein: the first check plate (12) and the second check plate (13) are consistent in structure and are arranged in a central symmetry mode about the circle center of the butterfly plate (11).

7. A butterfly check valve in accordance with claim 1, wherein: an access hole (16) is formed in the outer surface of the top end of the valve body (1) along the vertical middle axis of the valve body, and an access structure (8) is fixedly mounted on the outer surface of the valve body (1) close to the access hole (16).

8. A butterfly check valve in accordance with claim 7, wherein: overhaul structure (8) including mount pad (801), sealing strip (802) and convex lens (803), mount pad (801) are close to access hole (16) department through bolt fixed mounting in the top surface of valve body (1), the top of mount pad (801) is inlayed and is equipped with convex lens (803), and the junction at mount pad (801) and convex lens (803) both ends along the horizontal direction is equipped with sealing strip (802).