CN213982146U - Damping-adjustable slow-closing type double-plate check valve - Google Patents
Damping-adjustable slow-closing type double-plate check valve Download PDFInfo
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- CN213982146U CN213982146U CN202022839453.7U CN202022839453U CN213982146U CN 213982146 U CN213982146 U CN 213982146U CN 202022839453 U CN202022839453 U CN 202022839453U CN 213982146 U CN213982146 U CN 213982146U
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Abstract
The utility model discloses an adjustable damping slow-closing type double-plate check valve, which comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve shaft is fixedly connected in the valve cavity, two sub-valve clacks are rotatably arranged on the valve shaft, and an elastic reset piece is arranged on the valve shaft by matching the two sub-valve clacks; the valve cavity is internally provided with a valve seat matched with the two sub-valve clacks, the two sub-valve clacks are matched with the valve seat to divide the valve cavity into a medium inflow sub-valve cavity and a medium outflow sub-valve cavity, the medium inflow sub-valve cavity is internally provided with a corresponding elastic buffer assembly matched with any one sub-valve clack, and all the elastic buffer assemblies are matched with a driving adjusting assembly; the slow closing system is formed by arranging the elastic buffer assembly and the driving adjusting assembly, so that the slow closing system is excellent in performance, stable in opening and closing, free of noise and free of vibration; through the piston damping structure, the sub valve clack is closed slowly after being closed quickly, and is not influenced by media in a pipeline, so that destructive water hammer can be prevented; the device is simple and compact, long in service life, high in reliability and wide in application range.
Description
Technical Field
The utility model belongs to check valve product field relates to an adjustable damping slowly closes formula double plate check valve particularly.
Background
The check valve is a valve whose opening and closing part is a circular valve clack and acts by its own weight and medium pressure to block the medium from flowing backwards, belonging to the automatic valve class, also called check valve, one-way valve, reflux valve or isolation valve, used to protect the pump or other key equipment in the pipeline.
The common check valve has high closing speed, is easy to generate water hammer, causes pressure to rise suddenly, has huge noise and can damage pipelines and equipment. The slow-closing check valve solves the problem caused by the quick closing of a common check valve, has the technical characteristics of slow closing and water hammer elimination, is suitable for direct water supply and drainage systems of water pumps of industrial and mining enterprises and high-rise buildings, can reduce the generation of the water hammer phenomenon, and achieves the effect of safe closing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an adjustable damping slowly closes formula double plate check valve to current ordinary check valve closes fast, easily produces the water hammer, easily destroys pipeline and equipment scheduling problem among the solution background art.
In order to achieve the above object, the utility model provides a technical scheme as follows:
a damping-adjustable slow-closing type double-plate check valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve shaft is fixedly connected in the valve cavity, two sub-valve clacks are rotatably arranged on the valve shaft, and an elastic reset piece is arranged on the valve shaft in a manner of matching with the two sub-valve clacks; the valve cavity is internally provided with a valve seat matched with the two sub-valve clacks, the two sub-valve clacks are matched with the valve seat to divide the valve cavity into a medium inflow sub-valve cavity and a medium outflow sub-valve cavity, the medium inflow sub-valve cavity is internally provided with a corresponding elastic buffer assembly matched with any one sub-valve clack, and all the elastic buffer assemblies are matched with a driving adjusting assembly.
Preferably, the elastic buffer assembly comprises a piston rod, one end of the piston rod is matched with the corresponding sub-valve clack, the other end of the piston rod is arranged in a sleeve, the piston rod is connected with the sleeve in a sliding mode, and the sleeve is fixedly connected with the inner side wall of the valve body; the piston rod is equipped with and separates fender portion, separates into two with the sleeve inside the barrel and holds the chamber with the sleeve cooperation, and one of them holds the piston rod in chamber and goes up the cover and establish an elastic component, and the elastic component place holds the chamber and drive adjustment assembly cooperation setting.
Preferably, the driving adjusting assembly comprises a needle type adjusting valve, the needle type adjusting valve comprises two input ends and an output end, a first through hole is formed in an accommodating cavity where the valve body is matched with the elastic piece, and the first through hole is communicated with the output end through a guide pipe; the valve body of the medium inflow sub-valve cavity is provided with a second through hole, and the second through hole is communicated with the input end through a guide pipe.
Preferably, the elastic member is a compression spring, and the compression spring is arranged in the accommodating cavity far away from the corresponding sub-valve clack.
Preferably, the blocking part is provided with a plurality of first annular grooves at equal intervals, and the central axes of the first annular grooves are superposed with the central axis of the sleeve; a first rubber sealing ring is arranged in any one first annular groove.
Preferably, the sleeve comprises a cylinder body integrally connected with the inner wall of the valve body, one end of the cylinder body, far away from the corresponding sub-valve clack, is fixedly connected with a sealing cover, the cross section of the sealing cover is I-shaped, the sealing cover and the cylinder body are matched to form a second annular groove, and a second rubber sealing ring is arranged in the second annular groove.
Preferably, a stop pin shaft is fixedly arranged right above the valve shaft.
Preferably, the valve seat is provided with a third annular groove, and a first rubber sealing gasket is fixedly arranged in the third annular groove; and a fourth annular groove is formed in one side of the sub-valve clack corresponding to the valve seat, and a second rubber sealing gasket is fixedly arranged in the fourth annular groove.
Preferably, the outer diameter of the first rubber sealing gasket is larger than that of the second rubber sealing gasket.
Preferably, two guide blocks are fixedly installed on the inner side portion of the medium outflow sub-valve cavity, the two guide blocks are symmetrically arranged, two ends of the valve shaft and two ends of the stop pin shaft are respectively and fixedly arranged on the two guide blocks, and the inner side portion of the medium outflow sub-valve cavity is matched with any one of the guide blocks and is fixedly connected with a corresponding positioning block.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model forms a slow-closing system by arranging the elastic buffer component and the driving adjusting component, and has excellent performance, stable opening and closing, no noise and no vibration; the sub valve clack is not influenced by media in the pipeline, and is closed slowly after being closed quickly, so that destructive water hammer can be prevented; through the piston damping structure, the piston is simple and compact, long in service life, high in reliability and wide in application range.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a cross-sectional view a-a of fig. 1.
Fig. 3 is a cross-sectional view of B-B in fig. 1.
Fig. 4 is a right side view of the present invention.
Fig. 5 is a partially enlarged view of C in fig. 2.
The labels in the figure are: the valve comprises a valve body 1, a first through hole 11, a second through hole 12, a guide block 13, a positioning block 14, a valve shaft 2, a sub valve clack 3, a valve seat 4, a medium inflow sub valve cavity 51, a medium outflow sub valve cavity 52, an elastic reset piece 6, a piston rod 71, a sleeve 72, an accommodating cavity 73, an elastic piece 74, a blocking part 711, a needle type adjusting valve 8, an input end 81, an output end 82, a first rubber sealing ring 75, a cylinder body 721, a sealing cover 722, a second rubber sealing ring 723, a stop pin shaft 9, a first rubber sealing gasket 41 and a second rubber sealing gasket 31.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments of the present invention. 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.
Referring to fig. 1-5, a damping-adjustable slow-closing type double-plate check valve comprises a valve body 1, a valve cavity is arranged in the valve body 1, a valve shaft 2 is fixedly connected in the valve cavity, two sub-valve clacks 3 are rotatably mounted on the valve shaft 2, and an elastic reset piece 6 is arranged on the valve shaft 2 in a manner of matching with the two sub-valve clacks 3; the valve cavity is internally provided with a valve seat 4 matched with the two sub valve clacks 3, the two sub valve clacks 3 are matched with the valve seat 4 to divide the valve cavity into a medium inflow sub valve cavity 51 and a medium outflow sub valve cavity 52, the medium inflow sub valve cavity 51 is internally provided with a corresponding elastic buffer assembly matched with any one sub valve clack 3, and all the elastic buffer assemblies are matched with a driving adjusting assembly.
In this embodiment, the elastic reset member 6 is a torsion spring, the valve body 1 penetrates through the valve cavity from front to back, the valve seat 4 and the two sub valve flaps 3 in the valve cavity cooperate to divide the valve cavity into a front sub valve cavity and a rear sub valve cavity, the front sub valve cavity is a medium inflow sub valve cavity 51, and the rear sub valve cavity is a medium outflow sub valve cavity 52; two first mounting grooves are formed in the inner side wall of the valve body 1 of the medium outflow sub-valve cavity 52 and are symmetrically arranged, a guide block 13 is correspondingly mounted in each first mounting groove, two ends of the valve shaft 2 are respectively and fixedly arranged on the two guide blocks 13, two ends of a stop pin shaft 9 are also fixedly arranged on the two guide blocks 13, the stop pin shaft 9 is arranged right behind the valve shaft 2 in parallel, the sub-valve clacks 3 are semi-disc-shaped, corresponding ends of the two sub-valve clacks 3 are fixedly connected with shaft sleeves, the shaft sleeves are arranged on the valve shaft 2 in a penetrating manner, meanwhile, a torsion spring is also arranged on the valve shaft 2 in a penetrating manner, one end of the torsion spring is arranged on the front surface of one of the sub-valve clacks 3, and the other end of the torsion spring is arranged on the front surface of the other sub-valve clack 3; the torsion spring has a backward acting force on the sub-valve clack 3 and is used for preventing the sub-valve clack 3 from opening; the stop pin shaft 9 is used for preventing the opening angle of the sub valve clack 3 from being too large, and has a limiting effect on the sub valve clack 3; the inner side wall of the medium outflow sub-valve cavity 52 is matched with any one guide block 13 to form a corresponding second installation groove, a positioning block 14 is fixedly arranged in the second installation groove in a matched mode, the cross section of the positioning block 14 is T-shaped, the positioning block 14 is embedded in the second installation groove in the inner side of the valve body 1 from inside to outside, and the stable installation of the valve shaft 2 is further guaranteed. The valve seat 4 is integrally connected with the inner side wall of the valve body 1, the valve cavity is internally matched with the corresponding ends of the two sub valve clacks 3, the crosspieces of the valve seat 4 are fixedly arranged, and the crosspieces of the valve seat 4 are used for preventing a medium from leaking into the sub valve cavity 52 from the corresponding ends of the two sub valve clacks 3 and further improving the sealing reliability.
The elastic buffer component comprises a piston rod 71, one end of the piston rod 71 is matched with the corresponding sub-valve clack 3, the other end of the piston rod 71 is arranged in a sleeve 72, the piston rod 71 is connected with the sleeve 72 in a sliding mode, and the sleeve 72 is fixedly connected with the inner side wall of the valve body 1; the piston rod 71 is provided with a blocking part 711, the blocking part 711 is matched with the sleeve 72 to divide the interior of the sleeve 72 into two accommodating cavities 73, wherein an elastic element 74 is sleeved on the piston rod 71 of one accommodating cavity 73, and the accommodating cavity 73 where the elastic element 74 is located is matched with the driving adjustment assembly. The elastic member 74 is a compression spring disposed in the accommodation chamber 73 away from the corresponding sub-flap 3.
The driving adjusting assembly comprises a needle type adjusting valve 8, the needle type adjusting valve 8 comprises two output ends 82 and an input end 81, a first through hole 11 is formed in an accommodating cavity 73 where the valve body 1 is matched with the elastic piece 74, and the first through hole 11 is communicated with one output end 82 through a guide pipe; the valve body 1 of the medium inflow sub-valve chamber 51 is provided with a second through hole 12, and the second through hole 12 is communicated with the input end 81 through a conduit.
In this embodiment, the rear end of the piston rod 71 penetrates through the sleeve 72 and is arranged on the front surface of the corresponding sub-valve flap 3, the front end of the piston rod 71 is arranged in the sleeve 72, the piston rod 71 is provided with the blocking part 711, the diameter of the blocking part 711 is matched with the inner diameter of the sleeve 72, so that the inner cavity of the sleeve 72 is divided into a front accommodating cavity 73 and a rear accommodating cavity 73, the front end of the piston rod 71 is sleeved with a compression spring, one end of the compression spring is fixedly connected with the sleeve 72, the other end of the compression spring is fixedly connected with the piston rod 71, and the compression spring has a backward acting force on the piston rod 71; the driving adjusting component is a needle type adjusting valve 8 with a three-way structure and is fixedly arranged at the top of the valve body 1; the front side accommodating cavity 73 corresponding to the side part of the valve body 1 is provided with a first through hole 11, any through hole is communicated with an output end 82 of the needle type regulating valve 8 through a guide pipe, and simultaneously, the top valve body 1 of the medium inflow sub-valve cavity 51 is provided with a second through hole 12.
The sleeve 72 comprises a cylinder 721 integrally connected with the inner wall of the valve body 1, one end of the cylinder 721, which is far away from the corresponding sub-valve clack 3, is fixedly connected with a sealing cover 722, the cross section of the sealing cover 722 is in an I shape, the sealing cover 722 and the cylinder 721 are matched to form a second annular groove, and a second rubber sealing ring 723 is arranged in the second annular groove.
The blocking parts 711 are provided with a plurality of first annular grooves at equal intervals, and the central axes of the first annular grooves are superposed with the central axis of the sleeve 72; a first rubber seal 75 is provided in any one of the first annular grooves.
In this embodiment, the seal cover 722 and the second rubber seal 723 in the "i" shape are fitted to the sleeve 72, and the rear-side accommodation chamber 73 of the sleeve 72 is sealed in combination with the second rubber seal 723, thereby further improving the sealing reliability.
The valve seat 4 is provided with a third annular groove, and a first rubber sealing gasket 41 is fixedly arranged in the third annular groove; and a fourth annular groove is formed in one side of the sub-valve clack 3 corresponding to the valve seat 4, and a second rubber sealing gasket 31 is fixedly arranged in the fourth annular groove.
The outer diameter of the first rubber sealing gasket 41 is larger than that of the second rubber sealing gasket 31.
In this embodiment, by setting the difference in outer diameter between the first rubber seal gasket 41 and the second rubber seal gasket 31, the sealing reliability can be ensured even when a certain error occurs in the installation.
The working principle is as follows: when the acting force of the medium flowing into the sub-valve cavity 51 on the sub-valve clack 3 is greater than the acting force of the torsion spring on the sub-valve clack 3, the sub-valve clack 3 is opened, meanwhile, a part of the medium flowing into the sub-valve cavity 51 flows into the input end 81 of the needle-shaped regulating valve through the second through hole 12 and then flows into the rear accommodating cavity 73 of the sleeve 72 through the output end 82 respectively, and along with the increase of the medium flow, the opening angle of the sub-valve clack 3 is increased along with the increase of the medium flow until the full-open position; in the process of opening the sub valve clack 3, the piston can move backwards under the action force of the compression spring; when the medium flow is reduced or the medium reversely flows, the acting force of the medium flowing into the sub-valve cavity 51 on the sub-valve clack 3 is also slowly reduced, the sub-valve clack 3 is closed, and when the sub-valve clack 3 is closed to be contacted with the rear end of the piston rod 71, the piston rod 71 slides along with the sub-valve clack 3 in the same direction until the sub-valve clack 3 is attached to the valve seat 4; the piston rod 71 slides along with the sub-valve clack 3 in the same direction and needs to overcome the resistance of the compression spring, and the rear side of the conduit discharge sleeve 72 which can pass through the first through hole 11 in the process can contain the medium of the cavity 73, the utility model discloses the aperture of the needle type regulating valve 8 is adjusted to the accessible, and the removal speed of the medium in the control sleeve 72 is in order to reach the sliding speed of the control piston, and the sub-valve clack 3 reaches the purpose of slowly closing through the resistance of the piston rod 71.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The damping-adjustable slow-closing type double-plate check valve is characterized by comprising a valve body (1), wherein a valve cavity is arranged in the valve body (1), a valve shaft (2) is fixedly connected in the valve cavity, two sub-valve clacks (3) are rotatably arranged on the valve shaft (2), and an elastic reset piece (6) is arranged on the valve shaft (2) in a manner of being matched with the two sub-valve clacks (3); the valve cavity is internally provided with a valve seat (4) matched with the two sub-valve clacks (3), the two sub-valve clacks (3) are matched with the valve seat (4) to divide the valve cavity into a medium inflow sub-valve cavity (51) and a medium outflow sub-valve cavity (52), the medium inflow sub-valve cavity (51) is internally provided with a corresponding elastic buffer assembly matched with any one sub-valve clack (3), and all the elastic buffer assemblies are matched with a driving adjusting assembly.
2. The adjustable damping slow-closing type double-plate check valve as claimed in claim 1, wherein the elastic buffer assembly comprises a piston rod (71) with one end thereof arranged to be matched with the corresponding sub-valve flap (3), the other end of the piston rod (71) is arranged in a sleeve (72), the piston rod (71) is slidably connected with the sleeve (72), and the sleeve (72) is fixedly connected with the inner side wall of the valve body (1); the piston rod (71) is provided with a blocking part (711), the blocking part (711) is matched with the sleeve (72) to divide the interior of the sleeve (72) into two accommodating cavities (73), one of the accommodating cavities (73) is sleeved with an elastic part (74), and the accommodating cavity (73) where the elastic part (74) is located is matched with the driving adjusting assembly.
3. The adjustable damping slow-closing type double-plate check valve as claimed in claim 2, wherein the driving adjustment assembly comprises a needle type adjustment valve (8), the needle type adjustment valve (8) comprises two input ends (81) and an output end (82), the accommodating cavity (73) of the valve body (1) where the elastic member (74) is matched is provided with a first through hole (11), and the first through hole (11) is communicated with the output end (82) through a conduit; the valve body (1) of the medium inflow sub-valve cavity (51) is provided with a second through hole (12), and the second through hole (12) is communicated with the input end (81) through a guide pipe.
4. The double plate check valve of the adjustable damping slow-closing type as claimed in claim 2, characterized in that the elastic member (74) is a compression spring disposed in the accommodation chamber (73) away from the corresponding sub-flap (3).
5. The adjustable damping slow-closing type double-plate check valve as claimed in claim 2, wherein the blocking part (711) is provided with a plurality of first annular grooves at equal intervals, and the central axes of the first annular grooves coincide with the central axis of the sleeve (72); a first rubber sealing ring (75) is arranged in any one first annular groove.
6. The adjustable damping slow-closing type double-plate check valve as claimed in claim 2, wherein the sleeve (72) comprises a cylinder body (721) integrally connected with the inner wall of the valve body (1), one end of the cylinder body (721) far away from the corresponding sub-valve flap (3) is fixedly connected with a sealing cover (722), the cross section of the sealing cover (722) is in an I shape, the sealing cover (722) and the cylinder body (721) are matched to form a second annular groove, and a second rubber sealing ring (723) is arranged in the second annular groove.
7. The damping-adjustable slow-closing type double-plate check valve as claimed in claim 1, wherein a stop pin shaft (9) is fixedly arranged right behind the valve shaft (2).
8. The adjustable damping slow-closing double-plate check valve as claimed in claim 1, wherein the valve seat (4) is provided with a third annular groove, and a first rubber sealing gasket (41) is fixedly arranged in the third annular groove; and a fourth annular groove is formed in one side of the sub-valve clack (3) corresponding to the valve seat (4), and a second rubber sealing gasket (31) is fixedly arranged in the fourth annular groove.
9. The double plate check valve of the adjustable damping soft closing type as claimed in claim 8, wherein the outer diameter of the first rubber sealing gasket (41) is larger than the outer diameter of the second rubber sealing gasket (31).
10. The adjustable damping slow-closing type double-plate check valve as claimed in claim 1, wherein two guide blocks (13) are fixedly mounted on the inner side portion of the medium outflow sub-valve cavity (52), the two guide blocks (13) are symmetrically arranged, two ends of the valve shaft (2) and two ends of the stop pin shaft (9) are respectively fixedly arranged on the two guide blocks (13), and the inner side portion of the medium outflow sub-valve cavity (52) is matched with any one guide block (13) and is fixedly connected with a corresponding positioning block (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022839453.7U CN213982146U (en) | 2020-12-02 | 2020-12-02 | Damping-adjustable slow-closing type double-plate check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022839453.7U CN213982146U (en) | 2020-12-02 | 2020-12-02 | Damping-adjustable slow-closing type double-plate check valve |
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| Publication Number | Publication Date |
|---|---|
| CN213982146U true CN213982146U (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022839453.7U Active CN213982146U (en) | 2020-12-02 | 2020-12-02 | Damping-adjustable slow-closing type double-plate check valve |
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| CN (1) | CN213982146U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114028072A (en) * | 2021-11-25 | 2022-02-11 | 天津医科大学眼科医院 | Cataract superfulsation device convenient to use |
| CN114962732A (en) * | 2022-08-01 | 2022-08-30 | 沈阳泰科流体控制有限公司 | Water hammer-proof safety regulation balance check valve |
-
2020
- 2020-12-02 CN CN202022839453.7U patent/CN213982146U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114028072A (en) * | 2021-11-25 | 2022-02-11 | 天津医科大学眼科医院 | Cataract superfulsation device convenient to use |
| CN114028072B (en) * | 2021-11-25 | 2023-08-15 | 天津医科大学眼科医院 | Cataract superemulsion device convenient to use |
| CN114962732A (en) * | 2022-08-01 | 2022-08-30 | 沈阳泰科流体控制有限公司 | Water hammer-proof safety regulation balance check valve |
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