CN214367790U

CN214367790U - Manual check valve

Info

Publication number: CN214367790U
Application number: CN202120567554.5U
Authority: CN
Inventors: 高锡锋; 张玉彩; 朱森源; 林倩; 秦晓龙
Original assignee: Kaifeng High And Middle Pressure Valve Co ltd
Current assignee: Kaifeng High And Middle Pressure Valve Co ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-10-08
Anticipated expiration: 2031-03-19

Abstract

The utility model relates to a manual check valve, which comprises a valve body, the valve body include valve body entrance point and valve body exit end, be located the inboard valve body of valve body entrance point in be provided with the valve clack, be provided with the rocker on the valve clack, be provided with first spacing boss on the rocker, be provided with the valve gap on the valve body of rocker top, the top of valve gap is provided with the flange, upward is provided with the valve rod on flange and the valve gap, one side of first spacing boss orientation valve rod is provided with the arc surface, the bottom swing joint of arc surface and valve rod, upward be provided with the hand wheel on the valve rod of flange top, upward be provided with the slip stop device on the valve rod between flange and the valve gap. Improve the check valve closing speed, the utility model discloses adjust, convenient to use has extensive market prospect.

Description

Manual check valve

Technical Field

The utility model relates to a check valve field, concretely relates to manual check valve.

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 in structure to the stop valve and only lacks a valve rod that drives the valve flap. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). The valve is opened when the inlet pressure is greater than the sum of the weight of the flap and its flow resistance. 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 conventional check valve is applied to a system pipeline, the check valve can be completely closed only by waiting for the inlet end pressure to be lower than the back pressure of the valve clack when being cut off, and the closing speed of the valve clack of the check valve is too slow if the difference between the inlet end pressure and the back pressure of the valve clack is too small, so that the system medium supply during the emergency closing of the check valve is needed in the emergency situation, and the conventional check valve is not completely suitable.

Disclosure of Invention

The utility model provides a to prior art not enough, the utility model provides a can improve manual check valve of check valve closing speed for overcome defect among the prior art.

The utility model adopts the technical proposal that: the utility model provides a manual check valve, includes the valve body, the valve body include valve body entrance point and valve body exit end, be located the inboard valve body of valve body entrance point in be provided with the valve clack, be provided with the rocker on the valve clack, be provided with first spacing boss on the rocker, be provided with the valve gap on the valve body of rocker top, the top of valve gap is provided with the flange, goes up and is provided with the valve rod on flange and the valve gap, one side that first spacing boss orientation valve rod is provided with the arc surface, the bottom swing joint of arc surface and valve rod, go up and be provided with the hand wheel on the valve rod of flange top, go up and be provided with the slip stop device on the valve rod between flange and the valve gap.

Preferably, the sliding limiting device comprises a guide sleeve, the guide sleeve is sleeved on the upper flange, a guide groove is formed in the guide sleeve, a guide block is movably sleeved in the guide groove, and the guide block is fixedly connected with the valve rod.

Preferably, the valve clack and the rocker are fixed through a valve clack fixing bolt, the first limiting boss is located on one side of the valve clack fixing bolt, and a second limiting boss is arranged on the rocker on the other side of the valve clack fixing bolt.

Preferably, the inner wall of the valve body is provided with a hanging plate, the hanging plate is provided with a pin shaft, and the rocker is hinged on the pin shaft.

Preferably, a rubber gasket is arranged on one side of the valve clack facing the inlet end of the valve body.

Preferably, the valve cover is provided with a valve rod sealing groove, the valve rod sealing groove is sequentially provided with a packing pressing sleeve, a graphite sealing ring and a packing gasket from top to bottom, the top of the packing pressing sleeve is provided with a packing pressing plate, and the packing pressing plate and the valve cover are fixed through a split pin.

Preferably, the top of uide bushing be provided with the stop collar, the stop collar top is provided with fixed cover, the equal movable suit of stop collar and fixed cover is on the valve rod, stop collar and last flange swing joint, fixed cover and last flange threaded connection.

The utility model has the advantages that: first, the utility model discloses when this product is closed to urgent needs, through hand wheel cooperation valve rod on first spacing boss the spacing of arc surface order about the rocker orientation down valve body entrance point one side rotate final closed valve clack, improve the check valve closing speed, the effectual circulation of blocking the medium.

Secondly, slip stop device include that uide bushing, uide bushing are provided with the guide way on, the movable sleeve is equipped with guide block, guide block and valve rod fixed connection in the guide way. The motion mode of the valve rod is effectively limited, and the closing efficiency of the product is improved.

Finally, the utility model discloses the valve gap on be provided with the valve rod seal groove, valve rod seal groove from the top down has set gradually and has packed pressure cover, graphite seal circle and filler gasket, is provided with the clamp plate that packs on the top of packing pressure cover, it is fixed through the split pin between clamp plate and the valve gap to pack. And the leakage of the medium from the gap between the valve cover and the valve rod is reduced.

The utility model has the advantages of simple structure, convenient operation, design benefit has improved work efficiency greatly, has fine social and economic benefits, is the product of easily using widely.

Drawings

Fig. 1 is a schematic structural view of the open state of the present invention.

Fig. 2 is a partially enlarged schematic view of detail a of fig. 1.

Fig. 3 is a partially enlarged schematic view of detail B of fig. 1.

Fig. 4 is a schematic structural diagram of the closed state of the present invention.

Detailed Description

As shown in fig. 1, 2, 3 and 4, a manual check valve comprises a valve body 1, wherein the valve body 1 comprises a valve body inlet end and a valve body outlet end, a valve clack 2 is arranged in the valve body 1 positioned on the inner side of the valve body inlet end, a sealing surface matched with the valve clack 2 is arranged on the valve body 1 positioned on the inner side of the valve body inlet end, when the manual check valve is in a closed state, the sealing surface is attached to the valve clack 2, a rocker 3 is arranged on the valve clack 2, a first limiting boss 4 is arranged on the rocker 3 of the valve clack 2, a valve cover 5 is arranged on the valve body 1 above the rocker 3, an upper flange 6 is arranged above the valve cover 5, a valve rod 7 is arranged on the upper flange 6 and the valve cover 5, an arc surface is arranged on one side of the first limiting boss 4 facing the valve rod 7, the arc surface is movably connected with the bottom end of the valve rod 7, a hand wheel 8 is arranged on the valve rod 7 above the upper flange 6, the bottom of the inner ring of the hand wheel 8 is fixedly provided with a driving nut, and the inner ring of the connecting bearing is fixedly connected with the driving nut. A sliding limiting device is arranged on the valve rod 7 between the upper flange 6 and the valve cover 5.

The sliding limiting device comprises a guide sleeve 9, the guide sleeve 9 is of a circular tubular structure, the guide sleeve 9 is sleeved on an upper flange 6, the upper flange 6 and a valve cover 5 are fixed through a connecting rod 10, the connecting rod 10 is of a plurality, a guide groove 11 is formed in the guide sleeve 9, the guide groove 11 is parallel to a valve rod 7, a guide block 12 is movably sleeved in the guide groove 11, and the guide block 12 is fixedly connected with the valve rod 7.

The valve clack 2 and the rocker 3 are fixed through a valve clack fixing bolt 13, the first limiting boss 4 is located on one side of the valve clack fixing bolt 13, and a second limiting boss 14 is arranged on the rocker 3 on the other side of the valve clack fixing bolt 13. The inner wall of the valve body 1 is provided with a hanging plate 15, the hanging plate 15 is provided with a pin shaft 16, and the rocker 3 is hinged on the pin shaft 16. And a rubber sealing gasket 17 is arranged on one side of the valve clack 2 facing the inlet end of the valve body. The closing effect of the product in the closing state is improved.

In order to reduce the leakage of a medium from a gap between the valve cover 5 and the valve rod 7, the valve cover 5 is provided with a valve rod sealing groove 18, the valve rod sealing groove 18 is sequentially provided with a packing pressing sleeve 19, a graphite sealing ring 20 and a packing gasket 21 from top to bottom, the top of the packing pressing sleeve 19 is provided with a packing pressing plate 22, and the packing pressing plate 22 and the valve cover 5 are fixed through a split pin 23. The packing pressing sleeve 19, the graphite sealing ring 20, the packing gasket 21 and the packing pressing plate 22 are all sleeved on the valve rod 7.

The top of uide bushing 9 be provided with stop collar 24, stop collar 24 adopts hexagonal prism tubular structure, stop collar 24 top is provided with fixed cover 25, fixed cover 25 adopts the annular structure, fixed cover 25's external diameter is not less than the diameter of stop collar 24 circumcircle, stop collar 24 and fixed cover 25 equal activity suit are on valve rod 7, stop collar 24 and 6 swing joint of last flange, fixed cover 25 and 6 threaded connection of last flange.

The bottom of packing plate 22 is provided with packing and presses set spacing groove 26, and the top of packing and pressing set 19 adopts round platform shape tubular structure, and the top activity suit of packing and pressing set 19 is on packing and pressing set spacing groove 26, is provided with packing plate fixing device on valve gap 5, packing plate fixing device's quantity adopt a plurality of, packing plate fixing device include pterygoid lamina 27, split pin round pin axle 28 and split pin 23, pterygoid lamina 27 installs on valve gap 5, split pin axle 28 fixed mounting is on pterygoid lamina 27, and split pin 23 articulates on split pin axle 28, and split pin 23 passes through bolt fixed mounting on packing plate 22.

The use method of the product is as follows: as shown in fig. 1, 2, 3 and 4, when the product is used normally, the product needs to be installed in a corresponding system, when the product is used normally, because the pressure of the medium at the inlet end of the valve body of the product is greater than the self gravity of the valve clack 2 and the back pressure at the rear side of the valve clack 2, at this time, the valve clack 2 is in a normally open state, in the open state, the second limit boss 14 abuts against the inner wall of the valve body 1, and the inner cavity of the valve body 1 at the side of the valve clack 2 far away from the inlet end of the valve body is communicated with the outlet end of the valve body. When the valve clack 2 of the product needs to be closed, the hand wheel 8 is screwed, the hand wheel 8 drives the valve rod 7 to move downwards under the limit of the guide groove 11 on the guide sleeve 9 and the guide block 12 on the valve rod 7, the bottom end of the valve rod 7 drives the rocker 3 to rotate towards one side of the inlet end of the valve body under the limit of the arc surface on the first limit boss 4, and when the valve clack 2 and the inlet end of the valve body are closed, medium circulation is blocked. When the product needs to be opened, the hand wheel 8 needs to be driven reversely, system media enter the inner cavity of the valve body 1 from the inlet end of the valve body, and the valve clack 2 is driven to rotate reversely until the second limiting boss 14 abuts against the inner wall of the valve body 1.

Through the embodiment, when the product needs to be closed urgently, the hand wheel 8 is matched with the valve rod 7 on the first limiting boss 4 to drive the rocker 3 to rotate towards one side of the inlet end of the valve body to finally close the valve clack 2 under the limiting of the arc surface, so that the closing speed of the check valve is improved, and the circulation of media is effectively blocked.

The utility model discloses a satisfy a manual check valve in check valve field worker needs, make the utility model discloses extensive market prospect has.

Claims

1. A manual check valve, characterized in that: comprises a valve body (1), the valve body (1) comprises a valve body inlet end and a valve body outlet end, a valve clack (2) is arranged in the valve body (1) positioned at the inner side of the valve body inlet end, a rocker (3) is arranged on the valve clack (2), a first limiting boss (4) is arranged on the rocker (3), a valve cover (5) is arranged on the valve body (1) above the rocker (3), an upper flange (6) is arranged above the valve cover (5), a valve rod (7) is arranged on the upper flange (6) and the valve cover (5), an arc surface is arranged on one side of the first limiting boss (4) facing the valve rod (7), the circular arc surface is movably connected with the bottom end of the valve rod (7), a hand wheel (8) is arranged on the valve rod (7) above the upper flange (6), and a sliding limiting device is arranged on the valve rod (7) between the upper flange (6) and the valve cover (5).

2. The manual check valve of claim 1, wherein: the sliding limiting device comprises a guide sleeve (9), the guide sleeve (9) is sleeved on the upper flange (6), a guide groove (11) is formed in the guide sleeve (9), a guide block (12) is movably sleeved in the guide groove (11), and the guide block (12) is fixedly connected with the valve rod (7).

3. The manual check valve of claim 1, wherein: the valve clack (2) and the rocker (3) are fixed through a valve clack fixing bolt (13), the first limiting boss (4) is located on one side of the valve clack fixing bolt (13), and the rocker (3) on the other side of the valve clack fixing bolt (13) is provided with a second limiting boss (14).

4. The manual check valve of claim 1, wherein: the inner wall of the valve body (1) is provided with a hanging plate (15), the hanging plate (15) is provided with a pin shaft (16), and the rocker (3) is hinged on the pin shaft (16).

5. The manual check valve of claim 1, wherein: and a rubber sealing gasket (17) is arranged on one side of the valve clack (2) facing the inlet end of the valve body.

6. The manual check valve of claim 1, wherein: the valve cover (5) is provided with a valve rod sealing groove (18), the valve rod sealing groove (18) is sequentially provided with a packing pressing sleeve (19), a graphite sealing ring (20) and a packing gasket (21) from top to bottom, a packing pressing plate (22) is arranged on the top of the packing pressing sleeve (19), and the packing pressing plate (22) and the valve cover (5) are fixed through a split pin (23).

7. The manual check valve of claim 2, wherein: the top of uide bushing (9) be provided with stop collar (24), stop collar (24) top is provided with fixed cover (25), stop collar (24) and fixed cover (25) equal activity suit are on valve rod (7), stop collar (24) and last flange (6) swing joint, fixed cover (25) and last flange (6) threaded connection.