CN223120642U - Double-flap check valve - Google Patents
Double-flap check valveInfo
- Publication number
- CN223120642U CN223120642U CN202421868257.4U CN202421868257U CN223120642U CN 223120642 U CN223120642 U CN 223120642U CN 202421868257 U CN202421868257 U CN 202421868257U CN 223120642 U CN223120642 U CN 223120642U
- Authority
- CN
- China
- Prior art keywords
- butterfly plate
- sealing
- sealing base
- check valve
- baffle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a double-flap check valve, which comprises a valve body, wherein an annular boss is arranged in the valve body, a baffle rod which separates the annular boss into two semicircular channels is transversely arranged on the annular boss, a left butterfly plate and a right butterfly plate which are in sealing fit with the two semicircular channels are hinged on the valve body, a pressure spring is tightly arranged on one side of the butterfly plate, a connecting rod which is used for sleeving the pressure spring is arranged on the valve body, a buffer assembly is arranged on one side of the baffle plate, which faces to the hinged end of the left butterfly plate and the right butterfly plate, and comprises a sealing base, a plurality of elastic pieces and a plurality of fixing rods, the sealing base is arranged on the baffle rod in a limiting manner through the fixing rods, and the elastic pieces are tightly arranged between the sealing base and the baffle rod, so that the sealing base is elastically abutted to the left butterfly plate and the right butterfly plate.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a double-flap check valve.
Background
The double-flap check valve is used for a pure pipeline, an industrial, environment-friendly, water treatment and a water supply and drainage pipeline of a high-rise building to prevent a medium from flowing reversely, the check valve adopts a butt-clamp type structure, the butterfly plate is in two semicircles, a spring is adopted to forcibly reset, a sealing surface can be made of a body surfacing wear-resistant material or rubber lining, the butterfly plate is opened under the action of fluid pressure, fluid flows from an inlet side to an outlet side, when the pressure of the fluid at the inlet side is lower than that at the outlet side, in the prior art, the middle parts of the left butterfly plate and the right butterfly plate can carry out hard friction with a baffle rod on a valve body, so that gaps among the left butterfly plate, the right butterfly plate and the baffle rod gradually become larger, leakage is generated in gaps of the fluid, and the service life of the double-flap check valve is reduced.
Disclosure of utility model
The utility model aims to provide a double-flap check valve, which can reduce friction between a butterfly plate and a baffle rod when the butterfly plate is closed and opened, and prolong the service lives of the butterfly plate and the baffle plate.
In order to achieve the purpose, the double-flap check valve comprises a valve body, wherein an annular boss is arranged in the valve body, a baffle rod which separates the annular boss into two semicircular channels is transversely arranged on the annular boss, a left butterfly plate and a right butterfly plate which are in sealing fit with the two semicircular channels are hinged to the valve body, a pressure spring is tightly pressed on one side of the butterfly plate, a connecting rod which is used for sleeving the pressure spring is arranged on the valve body, a buffer assembly is arranged on one side of the baffle plate, facing towards the hinged end of the left butterfly plate and the right butterfly plate, and comprises a sealing base, a plurality of elastic pieces and a plurality of fixing rods, the sealing base is arranged on the baffle rod in a limiting mode through the fixing rods, and the elastic pieces are arranged between the sealing base and the baffle rod in a clamping mode, so that the sealing base is elastically abutted to the left butterfly plate and the right butterfly plate.
Preferably, a stud is arranged at one end of the fixing rod, a positioning boss is arranged on one side, facing the sealing base, of the baffle rod, a groove matched with the positioning boss is formed in the sealing base, a through hole communicated with the groove is formed in the sealing base, a screw hole corresponding to the through hole is formed in the positioning boss, and the fixing rod passes through the through hole once and is screwed in the screw hole.
Preferably, the positioning boss both sides are arranged in proper order and are provided with the spout, be provided with the portion of sliding that suits with the spout on the recess.
Preferably, a plurality of first clamping grooves are formed in the sealing base, which is located on two sides of the sliding part, in a transverse array mode, a plurality of second clamping grooves are formed in one side, corresponding to the first clamping grooves, of the baffle rod, and two ends of the elastic piece are abutted to the first clamping grooves and the second clamping grooves respectively.
Preferably, a plurality of sealing ribs are symmetrically arranged at the two sides of the sealing base and correspond to the left butterfly plate and the right butterfly plate, and the sealing ribs are arranged in a semicircular shape towards one side of the left butterfly plate.
Preferably, a conical opening is formed in one side, facing the left butterfly plate, of the sealing convex rib, and the conical opening is arranged in a gradually expanding state in one side, facing the left butterfly plate, of the sealing convex rib.
Preferably, the bulge that sealing base is located between left butterfly plate and the right butterfly plate is provided with clamping part, clamping part both sides form with left butterfly plate and right butterfly plate respectively and support tightly.
Preferably, a first yielding gap is arranged between the sealing base and the baffle rod, and a second yielding gap is arranged between the clamping part and the fixed rod.
Compared with the prior art, the sealing base has the beneficial effects that when the left butterfly plate and the right butterfly plate are in an open state, the left butterfly plate and the right butterfly plate slowly rotate and are in butt joint with the sealing base, the sealing base at the moment is used for reducing friction between the left butterfly plate and the right butterfly plate, the elastic piece is used for shrinking downwards to form a yielding, the second yielding gap can avoid the sealing base and the blocking rod from being blocked, when the left butterfly plate and the right butterfly plate are closed by receiving the pressure of the pressure spring, the sealing base synchronously rises, the restoring force is released by the elastic piece, the sealing base is in sealing butt joint when the left butterfly plate and the right butterfly plate are completely closed, and the conical opening on the sealing convex rib can improve the sealing performance to prevent leakage.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of the present utility model;
FIG. 2 is a cross-sectional view of the present utility model;
Fig. 3 is an enlarged view of the portion a of the present utility model.
The valve comprises a valve body, a2, an annular boss, a 3, a baffle rod, a 4, a left butterfly plate, a 5, a right butterfly plate, an 8, a pressure spring, a 9, a connecting rod, a 10, a buffer component, an 11, a sealing base, a 12, an elastic piece, a 13, a fixed rod, a 14, a stud, a 15, a positioning boss, a 16, a groove, a 17, a through hole, a 18, a screw hole, a 19, a chute, a 20, a sliding part, a 21, a first clamping groove, a 23, a second clamping groove, a 24, a sealing convex rib, a 25, a conical opening, a 26, a clamping part, a 27, a first yielding gap, a 28 and a second yielding gap.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Examples: the double-flap check valve shown in the accompanying drawings 1-3 comprises a valve body 1, an annular boss 2 is arranged in the valve body 1, a baffle rod 3 (an integrated structure) for dividing the annular boss 2 into two semicircular channels is transversely arranged on the annular boss 2, a left butterfly plate 4 and a right butterfly plate 5 which are in sealing fit with the two semicircular channels are arranged on the valve body 1 in a hinged mode (through mounting a valve rod), a pressure spring 8 is tightly pressed on one side of the butterfly plate, a connecting rod 9 (which is fixedly arranged through a bolt) for sleeving the pressure spring 8 is arranged on the valve body 1, a buffer assembly 10 is arranged on one side of the hinged end of the baffle plate towards the left butterfly plate 4 and the right butterfly plate 5, the buffer assembly 10 comprises a sealing base 11 (made of rubber materials in particular), a plurality of elastic pieces 12 (eight elastic pieces are arranged in a symmetrical mode) and a plurality of fixing rods 13 (four are arranged in a transverse array), the sealing base 11 is limited and arranged on the baffle rod 3 through the fixing rod 13, the elastic piece 12 is clamped and arranged between the sealing base 11 and the baffle rod 3, so that the sealing base 11 is elastically abutted with the left butterfly plate 4 and the right butterfly plate 5, when the left butterfly plate 4 and the right butterfly plate 5 are in an open state, the sealing base 11 slowly rotates and is abutted with the sealing base 11, at the moment, in order to reduce friction between the sealing base 11 and the left butterfly plate 4 and the right butterfly plate 5, the elastic piece 12 is utilized to shrink downwards to form a yielding, the second yielding gap 28 can prevent the sealing base 11 and the baffle rod 3 from being blocked, when the left butterfly plate 4 and the right butterfly plate 5 are closed by the pressure of the pressure spring 8, the sealing base 11 synchronously rises, the restoring force is released through the elastic piece 12, and the left butterfly plate 4 and the right butterfly plate 5 are completely closed, the sealing base 11 simultaneously forms sealing and abuts tightly, and the conical opening 25 on the sealing convex rib 24 can improve sealing performance and prevent leakage.
As shown in fig. 3, one end of the fixing rod 13 is provided with a stud 14 (as an integral structure), one side of the baffle rod 3 facing the sealing base 11 is provided with a positioning boss 15 (as an integral structure), the sealing base 11 is provided with a groove 16 adapted to the positioning boss, the sealing base 11 is provided with a through hole 17 communicated with the groove 16, the positioning boss 15 is provided with a screw hole 18 corresponding to the through hole 17, the fixing rod 13 passes through the through hole 17 once and is screwed in the screw hole 18, the sealing base 11 is limited and fixed under the action of the fixing rod 13, and meanwhile, the sealing base 11 performs up-down sliding operation by utilizing the through hole 17.
As shown in fig. 3, the sliding grooves 19 are sequentially arranged on two sides of the positioning boss 15 in an array manner, and the sliding parts 20 (as an integral structure) matched with the sliding grooves 19 are arranged on the grooves 16, so that the smoothness of the sealing base 11 during lifting operation can be improved, and the stability during lifting operation can be improved.
As shown in fig. 3, the sealing base 11 is provided with a plurality of first clamping grooves 21 in a transverse array on two sides of the sliding portion 20, a plurality of second clamping grooves 23 are provided on one side of the stop lever 3 corresponding to the first clamping grooves 21, two ends of the elastic member 12 (specifically, a pressure spring) are respectively and tightly arranged on the first clamping grooves 21 and the second clamping grooves 23, and the elastic member 12 is limited to prevent the elastic member 12 from generating distortion during operation.
As shown in fig. 3, a plurality of sealing ribs 24 (as an integral structure) are symmetrically arranged at two sides of the sealing base 11 and corresponding to the positions of the left butterfly plate 4 and the right butterfly plate 5, the sealing ribs 24 are arranged in a semicircular shape towards one side of the left butterfly plate 4, and the plurality of sealing ribs 24 are arranged to form a multistage sealing effect, so that the sealing performance of the left butterfly plate 4 and the right butterfly plate 5 when closed is enhanced.
As shown in fig. 3, the sealing rib 24 is provided with a tapered opening 25 towards the left butterfly plate 4, the tapered opening 25 is provided in a gradually expanding state towards the left butterfly plate 4, the tapered opening 25 provided on the sealing rib 24 is used for increasing a sealing contact point, and a sealing cavity is formed in the tapered opening 25 during sealing, so that the air pressure is increased, and the leakage is not easy.
As shown in fig. 3, the protrusion of the sealing base 11 between the left butterfly plate 4 and the right butterfly plate 5 is provided with a clamping portion 26 (as an integral structure), two sides of the clamping portion 26 respectively form a tight contact with the left butterfly plate 4 and the right butterfly plate 5, so as to increase the tight contact effect, and the sealing force between the sealing base 11 and the left butterfly plate 4 and the right butterfly plate 5 is increased by pressing the clamping portion 26.
As shown in fig. 3, a first yielding gap 27 is disposed between the sealing base 11 and the stop lever 3, a second yielding gap 28 is disposed between the clamping portion 26 and the fixing lever 13, the first yielding gap 27 is used for adjusting the sealing base 11 up and down, and the second yielding gap 28 is used for controlling the lifting amplitude of the sealing base 11 on the fixing lever 13.
In the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. refer to an orientation or a positional relationship based on that shown in the drawings, and are merely relational terms, which are used for convenience in describing structural relationships of various components or elements of the present utility model, and do not denote any one of the components or elements of the present utility model, and are not to be construed as limiting the present utility model.
Claims (8)
1. The utility model provides a bivalve check valve, includes valve body (1), be provided with annular boss (2) in valve body (1), transversely be provided with on annular boss (2) and separate baffle (3) that are two semicircle passageway with annular boss (2), articulated on valve body (1) be provided with two semicircle passageway formation sealed complex left butterfly plate (4) and right butterfly plate (5), butterfly plate one side compresses tightly and is provided with pressure spring (8), install connecting rod (9) that are used for the cover to establish pressure spring (8) on valve body (1), its characterized in that baffle (3) are provided with buffer unit (10) towards left butterfly plate (4) and right butterfly plate (5) articulated end one side, buffer unit (10) are including seal base (11), a plurality of elastic component (12) and a plurality of dead lever (13), seal base (11) are spacing to be set up on baffle (3) through dead lever (13), elastic component (12) press from both sides tightly to set up between seal base (11) and baffle (3) for seal base (11) and baffle (5) form with right butterfly plate (5).
2. The double-flap check valve of claim 1, wherein one end of the fixing rod (13) is provided with a stud (14), one side of the baffle rod (3) facing the sealing base (11) is provided with a positioning boss (15), the sealing base (11) is provided with a groove (16) which is matched with the fixing boss, the sealing base (11) is provided with a through hole (17) which is communicated with the groove (16), the positioning boss (15) is provided with a screw hole (18) which corresponds to the through hole (17), and the fixing rod (13) passes through the through hole (17) once and is screwed in the screw hole (18).
3. The double-flap check valve according to claim 2, wherein sliding grooves (19) are sequentially arranged on two sides of the positioning boss (15), and sliding parts (20) matched with the sliding grooves (19) are arranged on the grooves (16).
4. The double-flap check valve of claim 3, wherein the sealing base (11) is provided with a plurality of first clamping grooves (21) in a transverse array at two sides of the sliding part (20), a plurality of second clamping grooves (23) are formed in the baffle rod (3) at one side corresponding to the first clamping grooves (21), and two ends of the elastic piece (12) are respectively and tightly arranged on the first clamping grooves (21) and the second clamping grooves (23).
5. The double-flap check valve according to claim 1, wherein a plurality of sealing ribs (24) are symmetrically arranged at two sides of the sealing base (11) and correspond to the left butterfly plate (4) and the right butterfly plate (5), and the sealing ribs (24) are arranged in a semicircular shape towards one side of the left butterfly plate (4).
6. The double-flap check valve as set forth in claim 5, wherein the sealing bead (24) is provided with a tapered opening (25) toward the left butterfly plate (4), and the tapered opening (25) is provided in a gradually enlarged state toward the left butterfly plate (4).
7. The double-flap check valve according to claim 1, wherein the sealing base (11) is provided with a clamping part (26) between the left butterfly plate (4) and the right butterfly plate (5), and two sides of the clamping part (26) are respectively abutted against the left butterfly plate (4) and the right butterfly plate (5).
8. The double-flap check valve according to claim 7, wherein a first yielding gap (27) is arranged between the sealing base (11) and the stop lever (3), and a second yielding gap (28) is arranged between the clamping part (26) and the fixed lever (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421868257.4U CN223120642U (en) | 2024-08-03 | 2024-08-03 | Double-flap check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421868257.4U CN223120642U (en) | 2024-08-03 | 2024-08-03 | Double-flap check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223120642U true CN223120642U (en) | 2025-07-18 |
Family
ID=96376081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421868257.4U Active CN223120642U (en) | 2024-08-03 | 2024-08-03 | Double-flap check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223120642U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN121408273A (en) * | 2025-12-25 | 2026-01-27 | 威晟汽车科技(宁波)有限公司 | An anti-dry-running electronic water pump and a method for preventing dry-running of the electronic water pump. |
-
2024
- 2024-08-03 CN CN202421868257.4U patent/CN223120642U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN121408273A (en) * | 2025-12-25 | 2026-01-27 | 威晟汽车科技(宁波)有限公司 | An anti-dry-running electronic water pump and a method for preventing dry-running of the electronic water pump. |
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| GR01 | Patent grant |