CN214662274U

CN214662274U - Check valve for preventing reverse flow

Info

Publication number: CN214662274U
Application number: CN202121168893.2U
Authority: CN
Inventors: 石佳鸿
Original assignee: Shanghai Taikelong Valve Co ltd
Current assignee: Shanghai Taikelong Valve Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-09
Anticipated expiration: 2031-05-28

Abstract

The utility model provides a prevent check valve of reverse flow, including the valve body, still include: the flow regulating structure comprises a regulating column, a regulating hole, a threaded rod, a regulating lifting block, a regulating handle and a sealing gasket, wherein the regulating column is communicated with the top of the valve body, the bottom of the regulating column is welded at the bottom inside the valve body, and the regulating hole is formed in two sides of the regulating column; the utility model discloses a setting of regulation post, regulation hole, threaded rod, regulation elevator, adjustment handle, sealed pad, the valve clack, shutoff board and through-hole has possessed and can have adjusted medium flow size, and the leakproofness is good, can not cause the prevention of medium backward flow to flow advantage in the opposite direction, has solved current check valve and has had and to block the medium refluence, but the function is more single, can't adjust the flow volume through the valve medium, and the leakproofness is not good moreover, causes the problem of medium backward flow easily.

Description

Check valve for preventing reverse flow

Technical Field

The utility model relates to a check valve field especially relates to a prevent check valve of reverse flow.

Background

The check valve is a valve with a circular valve clack and acts by self weight and medium pressure to block the medium from flowing backwards. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The valve clack motion mode is divided into lifting type and swing type. The lift check valve is similar to a stop valve in structure, only lacks a valve rod for driving a valve clack, and medium flows in from an inlet end (lower side) and flows out from an outlet end (upper side). When the inlet pressure is greater than the sum of the weight of the valve clack and the flow resistance of the valve clack, the valve is opened, otherwise, the valve is closed when the medium flows backwards. Swing check valves have a flap that is tilted and can pivot, and operate on a similar principle to lift check valves. The check valve is commonly used as a bottom valve of a water pumping device and can prevent the backflow of water. The check valve and the stop valve are combined for use, and the safety isolation effect can be achieved. The disadvantages are high resistance and poor sealing performance when closed.

Although the existing check valve can block media from flowing backwards, the function is single, the flowing amount of media passing through the valve cannot be adjusted, the sealing performance is poor, the media can easily flow backwards, and therefore the check valve capable of adjusting the flow of the media, good in sealing performance and preventing the media from flowing backwards and not causing the media to flow backwards is provided to solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent check valve of reverse flow to solve the problem that proposes among the above-mentioned background art.

The utility model provides a pair of prevent check valve of reverse flow, including the valve body, still include:

the flow regulating structure comprises a regulating column, a regulating hole, a threaded rod, a regulating lifting block, a regulating handle and a sealing gasket, wherein the regulating column is communicated with the top of the valve body, the bottom of the regulating column is welded at the bottom inside the valve body, the regulating hole is formed in two sides of the regulating column, the threaded rod is in threaded connection with the top inside the regulating column, the regulating lifting block is in sliding connection inside the regulating column and is in rotating connection with the threaded rod, the regulating handle is installed at the top of the threaded rod, and the sealing gasket is bonded on the surface of the regulating lifting block;

the one-way plugging structure comprises a valve clack, a plugging plate and a through hole, the valve clack is hinged to the inside of the valve body, the plugging plate is fixedly installed in the inside of the valve body, and the through hole is formed in the inside of the plugging plate.

Preferably, the top of the side surface of the threaded rod is provided with a flow mark, and the flow mark is in three grades.

Preferably, the right side of adjustment handle top is rotated and is connected with rotatory piece, a plurality of anti-skidding lines have been seted up on the surface of rotatory piece.

Preferably, guide pillars are mounted on two sides of the interior of the adjusting column, sliding grooves are formed in two sides of the interior of the adjusting lifting block, and the guide pillars are connected with the sliding grooves in a sliding mode.

Preferably, the two sides of the valve body are both provided with annular grooves, and sealing rings are bonded inside the annular grooves.

Preferably, a sealing block is bonded to the left side of the valve flap, and the sealing block is made of rubber.

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

1. the utility model discloses a setting of regulation post, regulation hole, threaded rod, regulation elevator block, adjustment handle, sealed pad, valve clack, shutoff board and through-hole has possessed and to have adjusted medium flow size, and the leakproofness is good, can not cause the advantage of the prevention reverse flow of medium backward flow, has solved current check valve and has can block the medium refluence, but the function is more single, can't adjust the flow volume through the valve medium, and the leakproofness is not good, causes the problem of medium backward flow easily;

2. the utility model discloses a set up the flow sign, be convenient for observe the current flow size, improve the regulation precision; by arranging the rotating block, a worker can rotate the adjusting handle conveniently, and the adjusting speed is increased; through setting up guide pillar and sliding tray, be convenient for lead the regulation elevator.

3. The sealing ring is arranged, so that the phenomenon of poor sealing when the valve body is connected with the pipeline is prevented, and the medium leakage is prevented; through setting up sealed piece, be convenient for seal the valve clack, improve the leakproofness of valve clack.

Drawings

Fig. 1 is a schematic structural perspective view of the present invention;

FIG. 2 is a schematic sectional view of the front view of the structure of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 according to the present invention;

fig. 4 is an enlarged schematic view of the structure at B in fig. 2 according to the present invention.

Reference numbers in the figures: 1. a valve body; 2. a flow regulating structure; 21. an adjustment column; 22. an adjustment hole; 23. a threaded rod; 24. adjusting the lifting block; 25. an adjusting handle; 26. a gasket; 3. a one-way plugging structure; 31. a valve flap; 32. a plugging plate; 33. a through hole; 4. flow identification; 5. rotating the block; 6. a guide post; 7. a sliding groove; 8. a seal ring; 9. and (6) sealing the block.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Please refer to fig. 1, fig. 2, fig. 3 and fig. 4 in combination, wherein fig. 1 is a schematic structural perspective view of the present invention; FIG. 2 is a schematic sectional view of the front view of the structure of the present invention; FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 according to the present invention; fig. 4 is an enlarged schematic view of the structure at B in fig. 2 according to the present invention. A check valve for preventing reverse flow comprises a valve body 1, a flow regulating structure 2 and a one-way plugging structure 3, wherein the flow regulating structure 2 comprises a regulating column 21, a regulating hole 22, a threaded rod 23, a regulating lifting block 24, a regulating handle 25 and a sealing gasket 26, the regulating column 21 is communicated with the top of the valve body 1, the bottom of the regulating column 21 is welded at the bottom of the inside of the valve body 1, the regulating hole 22 is formed in two sides of the regulating column 21, the threaded rod 23 is in threaded connection with the top of the inside of the regulating column 21, the regulating lifting block 24 is in sliding connection with the inside of the regulating column 21, the regulating lifting block 24 is in rotational connection with the threaded rod 23, the regulating handle 25 is installed at the top of the threaded rod 23, and the sealing gasket 26 is adhered to the surface of the regulating lifting block 24; the one-way blocking structure 3 comprises a valve clack 31, a blocking plate 32 and a through hole 33, the valve clack 31 is hinged inside the valve body 1, the blocking plate 32 is fixedly arranged inside the valve body 1, and the through hole 33 is formed inside the blocking plate 32; through adjusting post 21, adjust hole 22, threaded rod 23, adjust the elevator block 24, adjustment handle 25, sealed pad 26, valve clack 31, the setting of shutoff board 32 and through-hole 33, the medium flow size can be adjusted to having possessed, the leakproofness is good, the prevention reverse flow's that can not cause the medium backward flow advantage, it can block the medium refluence to have solved current check valve, but the function is more single, the flow through the valve medium can't be adjusted, and the leakproofness is not good moreover, cause the problem of medium backward flow easily.

Further, the top of threaded rod 23 side is equipped with flow identification 4, and flow identification 4 is three grades, through setting up flow identification 4, is convenient for observe current flow size, improves the regulation precision.

Further, the right side at adjustment handle 25 top is rotated and is connected with rotatory piece 5, and a plurality of anti-skidding lines have been seted up on the surface of rotatory piece 5, and through setting up rotatory piece 5, the staff of being convenient for rotates adjustment handle 25, has promoted the speed of regulation.

Further, guide pillar 6 is all installed to the inside both sides of regulation post 21, and sliding tray 7 has all been seted up to the inside both sides of regulation elevator block 24, and guide pillar 6 and sliding tray 7 sliding connection are convenient for lead regulation elevator block 24 through setting up guide pillar 6 and sliding tray 7, lead it.

Further, the ring channel has all been seted up to the both sides of valve body 1, and the inside bonding of ring channel has sealing ring 8, through setting up sealing ring 8, appears sealed bad phenomenon when being convenient for prevent valve body 1 and pipe connection, prevents that the medium from leaking.

Further, the left side of valve clack 31 bonds there is sealed piece 9, and the material of sealed piece 9 is rubber, through setting up sealed piece 9, is convenient for seal valve clack 31, improves valve clack 31's leakproofness.

The utility model provides a pair of check valve that prevents flow in the opposite direction's theory of operation as follows: when the liquid positive direction in the valve flows, hydraulic pressure can be opened valve clack 31 top, liquid can flow smoothly through-hole 33, when liquid flows in the opposite direction, liquid can press valve clack 31 on the surface of shutoff board 32, thereby prevent the liquid backward flow, when the size of liquid flow needs to be adjusted, through rotatory piece 5 or directly rotate adjustment handle 25, adjustment handle 25 drives threaded rod 23 rotation and upward movement, threaded rod 23 drives and adjusts 24 upward movements of elevator, when the bottom of adjusting elevator 24 moves to being higher than regulation hole 22, liquid flow can pass through at utmost, when adjusting elevator 24 downstream, liquid flow can slowly reduce, observe flow sign 4, continue rotatory adjustment handle 25, it can to the liquid flow size of needs to adjust.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A non-return valve preventing flow in the opposite direction, comprising a valve body (1), characterized in that: further comprising:

the flow regulating structure (2), the flow regulating structure (2) comprises a regulating column (21), a regulating hole (22), a threaded rod (23), a regulating lifting block (24), a regulating handle (25) and a sealing gasket (26), the regulating column (21) is communicated with the top of the valve body (1), the bottom of the regulating column (21) is welded at the bottom inside the valve body (1), the regulating hole (22) is formed in two sides of the regulating column (21), the threaded rod (23) is in threaded connection with the top inside the regulating column (21), the regulating lifting block (24) is in sliding connection with the inside of the regulating column (21), the regulating lifting block (24) is in rotating connection with the threaded rod (23), the regulating handle (25) is installed at the top of the threaded rod (23), and the sealing gasket (26) is bonded on the surface of the regulating lifting block (24);

one-way plugging structure (3), one-way plugging structure (3) include valve clack (31), shutoff board (32) and through-hole (33), valve clack (31) articulate in the inside of valve body (1), shutoff board (32) fixed mounting is in the inside of valve body (1), the inside of shutoff board (32) is seted up in through-hole (33).

2. A non-return valve against reverse flow, according to claim 1, characterized in that the threaded rod (23) is provided with flow marks (4) at the top of its side, and the flow marks (4) are of three levels.

3. The check valve for preventing the reverse flow as claimed in claim 1, wherein a rotating block (5) is rotatably connected to the right side of the top of the adjusting handle (25), and a plurality of anti-slip lines are formed on the surface of the rotating block (5).

4. The check valve for preventing reverse flow according to claim 1, wherein guide posts (6) are installed on both sides of the inside of the adjusting post (21), sliding grooves (7) are opened on both sides of the inside of the adjusting lifting block (24), and the guide posts (6) are slidably connected with the sliding grooves (7).

5. The check valve for preventing the reverse flow according to claim 1, wherein the valve body (1) is provided with annular grooves on both sides, and a sealing ring (8) is bonded inside the annular grooves.

6. The check valve for preventing reverse flow according to claim 1, wherein a sealing block (9) is adhered to the left side of the valve flap (31), and the sealing block (9) is made of rubber.