CN214146712U

CN214146712U - Bolt valve cover bivalve check valve

Info

Publication number: CN214146712U
Application number: CN202023179169.8U
Authority: CN
Inventors: 耿联; 陆仕元; 叶少雄; 云永杰; 李海山; 叶子文; 黄城灿; 余松
Original assignee: Zhejiang Cotech Valve Co ltd
Current assignee: Zhejiang Cotech Valve Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-09-07
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses a bolted valve cover bivalve check valve, which comprises a valve body, wherein a medium flow passage is arranged inside the valve body in a penetrating way from left to right, a medium check assembly is arranged inside the valve body, and the medium check assembly is matched with the valve body to divide the medium flow passage into a medium inflow passage and a medium outflow passage; the top of the valve body is provided with an overflow channel, the top of the valve body is matched with the overflow channel and fixedly connected with a valve cover, and the overflow channel is communicated with a medium outflow channel; the medium check assembly comprises a valve shaft fixedly arranged in the valve body, two valve clacks are rotatably arranged on the valve shaft, a reset piece is sleeved on the valve shaft in a matching mode with the two valve clacks, a valve seat is arranged on the inner wall of the valve body in a matching mode with the two valve clacks, and the valve seat and the two valve clacks are matched to form a sealing surface; the valve cover structure is convenient for the on-line inspection and maintenance of the valve through the bolt at the top of the valve body, and the time benefit and the economic benefit are both considered; through setting up overflow channel, have the better effect of alleviating negative water hammer.

Description

Bolt valve cover bivalve check valve

Technical Field

The utility model belongs to the check valve field relates to a bolt valve gap bivalve check valve particularly.

Background

The check valve belongs to the automatic valve class, only allows the medium to pass through in one direction, relies on the power that the medium flows to open or close by oneself to prevent the medium refluence, is used for protecting the pump or other key equipment in the pipeline.

The check valve can be divided into three types, namely a lifting check valve, a swing check valve and a butterfly check valve according to the structure, and is most widely applied in a swing mode. The swing check valve can be divided into a single-flap type, a double-flap type and a multi-flap type, wherein the double-flap type check valve occupies the most important market with excellent performance.

The existing double-petal check valve can be divided into a plurality of forms such as a butt-clamp type, a lug type, a flange type, a butt-welding end and the like according to the connecting end. The double-flap check valve has the working characteristics of large load change and small opening and closing frequency in a pipeline, and the butt-welded end type valve just meets the characteristics, so the butt-welded end double-flap check valve is more and more used in practical application. In practical application, once the double-flap check valve is in an open working state, the service cycle is long, the valve flap, the torsion spring and other components do not move for a long time, the torsion spring is easy to lose effectiveness, the automatic closing performance of the valve is poor, the butt welding characteristic is high, the valve needs to be detached from a pipeline during inspection and maintenance, the workload is heavy, and the maintenance cycle is long.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bolt valve gap bivalve check valve to solve the always current bivalve formula check valve of background art and must demolish the valve from the pipeline when inspection and maintenance and make the problem that work load is heavy and maintenance cycle is long.

In order to achieve the above object, the utility model provides a technical scheme as follows:

a bolted valve cover double-flap check valve comprises a valve body, wherein a medium flow channel penetrates from left to right inside the valve body, a medium check assembly is arranged inside the valve body, and the medium check assembly is matched with the valve body to divide the medium flow channel into a medium inflow channel and a medium outflow channel; the top of the valve body is provided with an overflow channel, the top of the valve body is matched with the overflow channel and fixedly connected with a valve cover, and the overflow channel is communicated with a medium outflow channel;

the medium non-return assembly comprises a valve shaft fixedly arranged in the valve body, two valve clacks are rotatably arranged on the valve shaft, a reset piece is sleeved on the valve shaft in a matching mode with the two valve clacks, a valve seat is arranged on the inner wall of the valve body in a matching mode with the two valve clacks, and the valve seat and the two valve clacks are matched to form a sealing surface.

Preferably, the medium check assembly further comprises a limit pin shaft, the limit pin shaft is fixedly arranged on the right side of the valve shaft, and the limit pin shaft and the two valve clacks are respectively matched.

Preferably, the cross section of the overflow channel is a combination of a right trapezoid and a rectangle, the oblique side of the right trapezoid forms an obtuse angle with the horizontal plane, and the rectangle is arranged above the right trapezoid.

Preferably, the top of the valve body is provided with an annular limiting groove, the bottom of the valve cover is fixedly provided with an annular limiting block matched with the annular limiting groove, and a sealing gasket is arranged between the annular limiting block and the annular limiting groove.

Preferably, the top of the valve cover is provided with an eyebolt.

Preferably, medium non return subassembly still includes two guide blocks, and one of them guide block is fixed to be set up in valve shaft and spacing round pin axle one end, and another guide block is fixed to be set up in the other end of valve shaft and spacing round pin axle, and two guide blocks are inlayed and are established at the valve body inboard, and a locating piece is inlayed and established to arbitrary guide block of valve body inboard cooperation.

Preferably, the positioning block comprises a first positioning portion and a second positioning portion, the diameter of the first positioning portion is smaller than that of the second positioning portion, and the second positioning portion and the guide block are arranged in a matched mode.

Preferably, the medium inflow passage includes a first medium inflow passage and a second medium inflow passage in order from left to right, a diameter of the first medium inflow passage coincides with a maximum diameter of the second medium inflow passage, and a diameter of the second medium inflow passage decreases in order to right.

Preferably, the medium inflow channel sequentially comprises a first medium outflow channel, a second medium outflow channel and a third medium outflow channel from left to right, the diameter of the first medium outflow channel is larger than that of the first medium inflow channel, the diameter of the second medium outflow channel decreases sequentially to the right, and the diameter of the third medium outflow channel is equal to that of the first medium inflow channel.

Preferably, any valve clack is half disc type, the disk seat includes valve seat body and valve seat crosspiece, the circular arc cooperation setting of valve seat body and two valve clacks, the straight flange cooperation setting of valve seat crosspiece and two valve clacks.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model has the advantages that the bolt valve cover structure at the top of the valve body is convenient for the on-line inspection and maintenance of the valve, and the time benefit and the economic benefit are both considered; by arranging the overflow channel, the effect of better reducing the negative water hammer is achieved; the utility model has stable opening and closing, no vibration and no noise; the fluid resistance is small, and the energy-saving effect is obvious; simple structure, long service life, high reliability and wide application range.

Drawings

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

Fig. 2 is a top sectional view of the present invention.

Fig. 3 is a right side sectional view of the present invention.

The labels in the figure are: the valve comprises a valve body 1, a valve clack 2, a valve seat body 31, a valve seat crosspiece 32, a guide block 4, a valve shaft 6, a reset part 7, a limiting pin 8, an overflow channel 9, a sealing gasket 10, an eye bolt 17, a first positioning part 51, a second positioning part 52, a first medium inflow channel 11, a second medium inflow channel 12, a first medium outflow channel 13, a second medium outflow channel 14, a third medium outflow channel 15 and a valve cover 16.

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. 1-3, a bolted valve cover double-disc check valve comprises a valve body, a medium flow channel penetrates from left to right inside the valve body, a medium check assembly is arranged inside the valve body, and the medium check assembly is matched with the valve body to divide the medium flow channel into a medium inflow channel and a medium outflow channel; the top of the valve body is provided with an overflow channel, the top of the valve body is matched with the overflow channel to be fixedly connected with the valve cover, and the overflow channel is communicated with the medium outflow channel.

In the utility model, the medium check assembly is used as a boundary, the medium inflow channel is arranged at the left side of the medium check assembly, and the medium outflow channel is arranged at the right side of the medium check assembly; the top of the valve body is outwards provided with an extension part, the valve cover is also provided with a corresponding extension part, the two extension parts are fixedly connected through a stud bolt, the valve cover is used for sealing the overflow channel, and the overflow channel is communicated with the medium outflow channel on the right side of the medium check assembly, so that the overflow channel and the medium outflow channel are combined to form a sub-valve cavity; through the valve gap that sets up overflow passageway and sealed overflow passageway, reach the better effect that alleviates the burden water hammer, the online inspection and the maintenance of the valve of being convenient for of setting up of valve gap compromise time benefit and economic benefits simultaneously.

The extension portion at the top of the valve body is provided with an annular limiting groove, the extension portion at the bottom of the valve cover is fixedly provided with an annular limiting block in a manner of being matched with the annular limiting groove, and a sealing gasket is arranged between the annular limiting block and the annular limiting groove. Through setting up annular spacing groove and annular stopper, the quick location installation of being convenient for combines seal gasket, improves the sealing reliability simultaneously, and seal gasket here is the ring.

The cross-section of the overflow channel is a combination of a right trapezoid and a rectangle, the inclined edge of the right trapezoid forms an obtuse angle with the horizontal plane, and the rectangle is arranged above the right trapezoid. The utility model discloses in, medium non return subassembly sets up in overflow channel's left side below, through the relative position who sets up overflow channel and medium non return subassembly, is more convenient for inspection and maintenance.

The medium inflow channel sequentially comprises a first medium inflow channel and a second medium inflow channel from left to right, the diameter of the first medium inflow channel is consistent with the maximum diameter of the second medium inflow channel, and the diameter of the second medium inflow channel is sequentially reduced towards right.

The medium inflow channel sequentially comprises a first medium outflow channel, a second medium outflow channel and a third medium outflow channel from left to right, the diameter of the first medium outflow channel is larger than that of the first medium inflow channel, the diameter of the second medium outflow channel is sequentially reduced towards right, and the diameter of the third medium outflow channel is equal to that of the first medium inflow channel.

The utility model discloses in, through the diameter that sets up medium inflow channel for the medium can be followed medium inflow channel and flowed in fast, through the diameter that sets up medium outflow channel, and combines with overflow channel, and the valve clack of being convenient for is closed fast after opening.

The medium non-return assembly comprises two guide blocks, wherein one guide block is fixedly connected with one end of the valve shaft and one end of the limiting pin shaft, the other guide block is fixedly connected with the other end of the valve shaft and the other end of the limiting pin shaft, the two guide blocks are embedded inside the valve body, therefore, the valve shaft is fixedly arranged inside the valve body, a positioning block is embedded inside the valve body and matched with any one guide block, the positioning block comprises a first positioning part and a second positioning part, the first positioning part and the second positioning part are semi-cylindrical, the diameter of the first positioning part is smaller than that of the second positioning part, the second positioning part and the guide blocks are matched, the positioning block is embedded inside the valve body from inside to outside, and meanwhile, the positioning block and the guide blocks are fixedly connected through set screws, so that the valve shaft and the limiting pin shaft are fixedly arranged inside the valve body, the valve shaft and the limiting pin shaft play a role in up-down supporting for the two guide blocks, and the positioning block plays a role in left-right limiting for the guide blocks, the built-in structure can not be used for drilling holes on the valve body by mistake, and the strength of the valve body is good.

The valve shaft is rotatably provided with two valve clacks, any one valve clack is in a semicircular disc shape, the valve shaft is sleeved with a reset piece matched with the two valve clacks, the reset piece is a torsion spring, one end of the torsion spring is matched with the right surface of one valve clack, and the other end of the torsion spring is matched with the right surface of the other valve clack; the limiting pin shaft is fixedly arranged on the right side of the valve shaft and is matched with the two valve clacks respectively, and the limiting pin shaft is used for limiting the valve clacks and preventing the opening angles of the valve clacks from being too large.

The valve seat comprises a valve seat body and a valve seat crosspiece, the valve seat body and the valve seat crosspiece are arranged on the left side of the valve clack, the valve seat body is matched with the circular arcs of the two valve clacks, the valve seat crosspiece is matched with the straight edges of the two valve clacks, and therefore the valve seat and the two valve clacks are matched to form a sealing surface.

And the top of the valve cover is provided with an eyebolt.

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

1. A bolted valve cover double-flap check valve comprises a valve body, wherein a medium flow channel penetrates from left to right inside the valve body, and a medium check assembly is arranged inside the valve body; the top of the valve body is provided with an overflow channel, the top of the valve body is matched with the overflow channel and fixedly connected with a valve cover, and the overflow channel is communicated with a medium outflow channel;

2. The bolted valve cover double-flap check valve as claimed in claim 1, wherein the medium check assembly further comprises a limit pin shaft, the limit pin shaft is fixedly arranged on the right side of the valve shaft, and the limit pin shaft is respectively matched with the two valve flaps.

3. The double-disc check valve with a bolted valve cover as claimed in claim 1, wherein the cross section of the overflow channel is a combination of a right trapezoid and a rectangle, the oblique side of the right trapezoid forms an obtuse angle with the horizontal plane, and the rectangle is arranged above the right trapezoid.

4. The double-disc check valve with the bolted valve cover as claimed in claim 1, wherein an annular limiting groove is formed in the top of the valve body, an annular limiting block is fixedly arranged at the bottom of the valve cover in cooperation with the annular limiting groove, and a sealing gasket is arranged between the annular limiting block and the annular limiting groove.

5. A bolted valve cover double flap check valve as claimed in claim 1, wherein said valve cover top is provided with an eye bolt.

6. The double-disc check valve with a bolted valve cover as claimed in claim 1, wherein the medium check assembly further comprises two guide blocks, one of the guide blocks is fixedly arranged at one end of the valve shaft and one end of the limit pin shaft, the other guide block is fixedly arranged at the other end of the valve shaft and the other end of the limit pin shaft, the two guide blocks are embedded inside the valve body, and a positioning block is embedded inside the valve body and matched with any one of the guide blocks.

7. The double-flap check valve with a bolted valve cover as claimed in claim 6, wherein the locating block comprises a first locating part and a second locating part, the diameter of the first locating part is smaller than that of the second locating part, and the second locating part is matched with the guide block.

8. The double-disc check valve of a bolted valve cover according to claim 1, characterized in that the medium inflow passage comprises a first medium inflow passage and a second medium inflow passage in the order from left to right, the diameter of the first medium inflow passage coincides with the maximum diameter of the second medium inflow passage, and the diameter of the second medium inflow passage decreases in the order from right.

9. The double-disc check valve of a bolted valve cover according to claim 1, characterized in that the medium inflow passage comprises a first medium outflow passage, a second medium outflow passage and a third medium outflow passage in the order from left to right, the diameter of the first medium outflow passage is larger than that of the first medium inflow passage, the diameter of the second medium outflow passage decreases in the order from right, and the diameter of the third medium outflow passage is equal to that of the first medium inflow passage.

10. A two-piece check valve with a bolted valve cover as defined in claim 1, wherein either of said valve pieces is of a semi-disc type, and said valve seat comprises a valve seat body and a valve seat crosspiece, wherein said valve seat body is disposed in cooperation with the circular arcs of both valve pieces, and said valve seat crosspiece is disposed in cooperation with the straight edges of both valve pieces.