CN217153084U

CN217153084U - Diaphragm valve is opened to low pressure

Info

Publication number: CN217153084U
Application number: CN202220316258.2U
Authority: CN
Inventors: 余凯迪; 陈建飞; 陈攀; 葛之谦
Original assignee: Zhejiang Amy Fluid Technology Co ltd
Current assignee: Zhejiang Amy Fluid Technology Co ltd
Priority date: 2022-02-16
Filing date: 2022-02-16
Publication date: 2022-08-09
Anticipated expiration: 2032-02-16

Abstract

The utility model provides a diaphragm valve is opened to low pressure, it belongs to diaphragm valve technical field, it includes the valve body, the valve body is equipped with the sealing, the sealing includes first sealed face and second sealed face, the valve body is equipped with the first connector in the first sealed face to the department, the valve body is equipped with the second connector in the second sealed face to the department, the first connector and second connector all are equipped with the same valve body seal assembly; the utility model discloses the sealing of valve body is equipped with the sealed face of first sealed face and second, and be equipped with valve body seal assembly and make the sealed face of first sealed face and the sealed face department homoenergetic of second seal and separate, when medium pressure is not enough in the valve body, need to make the sealed face of second and corresponding diaphragm separation, form the passageway that supplies the medium circulation bottom the valve body runner, when medium pressure is normal when the valve body, need to make the sealed face of second and corresponding diaphragm seal and make the separation of first sealed face and corresponding diaphragm simultaneously, form the passageway that supplies the medium circulation at valve body runner top, be applicable to the low pressure condition.

Description

Diaphragm valve is opened to low pressure

Technical Field

The utility model relates to a diaphragm valve technical field, in particular to diaphragm valve is opened to low pressure.

Background

The diaphragm valve is a stop valve which uses a diaphragm as an opening and closing part to close a flow passage, cut off fluid and separate an inner cavity of the valve body from an inner cavity of the valve cover; the diaphragm is made of elastic, corrosion-resistant and non-permeable materials such as rubber, plastic and the like; the valve body is made of multipurpose plastic, glass fiber reinforced plastic, ceramic or metal lining rubber material; the structure is simple, the sealing and corrosion resistance performance is good, and the fluid resistance is small; the medium is used for low pressure, low temperature, high corrosivity and suspended matter-containing medium; the structure is divided into a ridge type, a stop type, a gate plate type and the like; the driving modes are manual, pneumatic and electric.

The sealing principle of the diaphragm valve is that the diaphragm or the diaphragm assembly is pressed down by the downward movement of the operating mechanism to be tightly sealed with the channel of the weir-type lining valve body or the straight-through type lining valve body, so that the diaphragm valve is sealed; the magnitude of the specific sealing pressure is realized by the magnitude of the downward pressure of the closing member.

Diaphragm valve among the prior art is equipped with bellied sealed face and diaphragm in the valve body and seals, and when the medium pressure of circulation was not enough in the valve body, the medium can't pass through bellied sealed face, and the flow control scope of valve is less simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide a diaphragm valve is opened to low pressure.

The utility model discloses the technical scheme who takes as follows: a diaphragm valve opened under low pressure comprises a valve body, wherein the valve body is provided with a sealing part, the sealing part comprises a first sealing surface and a second sealing surface, the valve body is provided with a first connecting port at the facing position of the first sealing surface, the valve body is provided with a second connecting port at the facing position of the second sealing surface, the first connecting port and the second connecting port are both provided with the same valve body sealing assembly, the valve body sealing assembly comprises a valve cover connected with a valve body, a valve rod, a valve clack connected with the valve rod, a diaphragm clamped between the valve cover and the valve body and a hand wheel used for operating the valve rod, when the hand wheel rotates, the valve rod drives the valve clack to push the diaphragm to be sealed or separated from the first sealing surface, and when the hand wheel rotates, the valve rod drives the valve clack to push the diaphragm to be sealed or separated from the second sealing surface.

When the medium in the valve body is not circulated, the hand wheel rotates to enable the valve rod to drive the valve clack to push the diaphragm to be sealed with the first sealing surface, and the hand wheel rotates to enable the valve rod to drive the valve clack to push the diaphragm to be sealed with the second sealing surface.

When the medium pressure in the valve body is insufficient, the hand wheel rotates to enable the valve rod to drive the valve clack to push the diaphragm and the first sealing surface to seal, and the hand wheel rotates to enable the valve rod to drive the valve clack to push the diaphragm and the second sealing surface to separate.

When the medium pressure in the valve body is normal, the hand wheel rotates to enable the valve rod to drive the valve clack to push the diaphragm to be separated from the first sealing surface, and the hand wheel rotates to enable the valve rod to drive the valve clack to push the diaphragm to be sealed with the second sealing surface.

When the medium flow in the valve body is maximum, the handwheel rotates to enable the valve rod to drive the valve clack to push the diaphragm to be separated from the first sealing surface, and the handwheel rotates to enable the valve rod to drive the valve clack to push the diaphragm to be separated from the second sealing surface.

The transparent cover is provided with a scale for comparing the opening degree of the valve.

The valve clack is provided with a threaded connecting hole, and the diaphragm is provided with a threaded connecting column which is used for being assembled with the threaded connecting hole.

And a support piece used for enabling the valve rod to stably move is arranged in the valve cover.

The utility model has the advantages as follows: the utility model discloses the sealing of valve body is equipped with the sealed face of first sealed face and second, and be equipped with valve body seal assembly and make the sealed face of first sealed face and the sealed face department homoenergetic of second seal and separate, when medium pressure is not enough to be the low pressure state in the valve body, need to make the sealed face of second and separate rather than corresponding diaphragm, form the passageway that supplies the medium circulation bottom the valve body runner, when medium pressure is normal when the valve body, need to make the sealed face of second and make the sealed face of first sealed face and separate rather than corresponding diaphragm simultaneously with its corresponding diaphragm, form the passageway that supplies the medium circulation at valve body runner top, be applicable to the low pressure condition, this valve makes the adjustable scope of flow in the valve body bigger through two sealed simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.

Fig. 1 is a first cross-sectional view of the present invention;

fig. 2 is a second cross-sectional view of the present invention;

in the figure, 1-valve body, 11-sealing part, 111-first sealing surface, 112-second sealing surface, 2-valve cover, 21-supporting piece, 3-handwheel, 4-transparent cover, 5-valve rod, 6-valve clack, 61-threaded connecting hole, 7-diaphragm and 71-threaded connecting column.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be construed as limitations to the embodiments of the present invention, and the following embodiments do not describe the embodiments one by one.

The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.

As shown in fig. 1 and fig. 2, for the present invention, an embodiment is provided:

a low-pressure opening diaphragm valve comprises a valve body 1, wherein the valve body 1 is provided with a sealing part 11, the sealing part 11 comprises a first sealing surface 111 and a second sealing surface 112, the valve body 1 is provided with a first connection opening facing the first sealing surface 111, the valve body 1 is provided with a second connection opening facing the second sealing surface 112, the first connecting port and the second connecting port are both provided with the same valve body sealing assembly, the valve body sealing assembly comprises a valve cover 2 connected with a valve body 1, a valve rod 5, a valve clack 6 connected with the valve rod 5, a diaphragm 7 clamped between the valve cover 2 and the valve body 1 and a hand wheel 3 used for operating the valve rod, when the hand wheel 3 rotates, the valve rod 5 drives the valve flap 6 to push the diaphragm 7 to seal or separate from the first sealing surface 111, and when the hand wheel 3 rotates, the valve rod 5 drives the valve flap 6 to push the diaphragm 7 to seal or separate from the second sealing surface; the two structures capable of opening and closing are arranged on one valve body 1, when the medium pressure in the valve body 1 is insufficient and is in a low-pressure state, the second sealing surface 112 needs to be separated from the corresponding diaphragm 7, a channel for medium circulation is formed at the bottom of a flow channel of the valve body 1, when the medium pressure in the valve body 1 is normal, the second sealing surface 112 needs to be sealed with the corresponding diaphragm 7, the first sealing surface 111 needs to be separated from the corresponding diaphragm, and a channel for medium circulation is formed at the top of the flow channel of the valve body 1, so that the valve body is suitable for the low-pressure condition; meanwhile, the valve has a larger adjustable range of the flow in the valve body through two seals.

Specifically, when the medium in the valve body 1 does not flow, the hand wheel 3 rotates to drive the valve rod 5 to drive the valve flap 6 to push the diaphragm 7 to seal with the first sealing surface 111, and when the hand wheel 3 rotates to drive the valve rod 5 to drive the valve flap 6 to push the diaphragm 7 to seal with the second sealing surface 112; when the medium pressure in the valve body 1 is insufficient, the hand wheel 3 rotates to enable the valve rod 5 to drive the valve flap 6 to push the diaphragm 7 to seal with the first sealing surface 111, and when the hand wheel 3 rotates, the valve rod 5 drives the valve flap 6 to push the diaphragm 7 to separate from the second sealing surface 112; when the medium pressure in the valve body 1 is normal, the hand wheel 3 rotates to drive the valve rod 5 to drive the valve flap 6 to push the diaphragm 7 to separate from the first sealing surface 111, and when the hand wheel 3 rotates to drive the valve rod 5 to drive the valve flap 6 to push the diaphragm 7 to seal with the second sealing surface 112; when the medium flow in the valve body 1 is maximum, the hand wheel 3 rotates to drive the valve rod 5 to drive the valve flap 6 to push the diaphragm 7 to separate from the first sealing surface 111, and when the hand wheel 3 rotates, the valve rod 5 drives the valve flap 6 to push the diaphragm 7 to separate from the second sealing surface 112.

Furthermore, one end of the valve rod 5 extends out of the hand wheel 3 and is provided with an indicator, and a transparent cover 4 is arranged outside the part of the valve rod 5 extending out of the hand wheel 3; the transparent cover (4) is arranged to facilitate observation and protection of the valve rod (5), scales used for contrasting the opening degree of the valve are arranged on the transparent cover (4), each scale represents the opening degree between the sealing surface of the valve body (1) and the corresponding membrane, and the medium flow rates which can pass through the different opening degrees are different.

Furthermore, the valve flap 6 is provided with a threaded connecting hole 61, and the diaphragm 7 is provided with a threaded connecting column 71 which is used for being assembled with the threaded connecting hole 61, so that the diaphragm 7 can be conveniently disassembled and assembled.

The valve cover 2 is internally provided with a supporting piece 21 used for enabling the valve rod 5 to stably move, effective supporting can be formed in the rotating process of the valve rod 5, and the stability is improved.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A diaphragm valve opened at low pressure comprises a valve body (1), and is characterized in that the valve body (1) is provided with a sealing part (11), the sealing part (11) comprises a first sealing surface (111) and a second sealing surface (112), the valve body (1) is provided with a first connecting port at the position facing the first sealing surface (111), the valve body (1) is provided with a second connecting port at the position facing the second sealing surface (112), the first connecting port and the second connecting port are both provided with the same valve body sealing assembly, the valve body sealing assembly comprises a valve cover (2) connected with the valve body (1), a valve rod (5), a valve clack (6) connected with the valve rod (5), a diaphragm (7) clamped between the valve cover (2) and the valve body (1), and a hand wheel (3) used for operating the valve rod; the sealing part (11) divides a medium channel of the valve body (1) into an upper flow channel and a lower flow channel, the membrane (7) in the valve body sealing assembly at the first connecting port is provided with a sealing position which is close to the first sealing surface (111) and forms sealing fit to seal the upper flow channel and a separating position which is far away from the first sealing surface (111) and enables the upper flow channel to circulate, and the membrane (7) in the valve body sealing assembly at the second connecting port is provided with a sealing position which is close to the second sealing surface (112) and forms sealing fit to seal the lower flow channel and a separating position which is far away from the second sealing surface (112) and enables the lower flow channel to circulate.

2. A diaphragm valve according to claim 1, wherein one end of the valve rod (5) extends out of the handwheel (3) and is provided with an indicator, and a transparent cover (4) is arranged outside the valve rod (5) at the part extending out of the handwheel (3).

3. A low pressure opening diaphragm valve according to claim 2, wherein the transparent cover (4) is provided with a scale for comparing the valve opening.

4. A low pressure opening diaphragm valve according to claim 1, wherein said valve flap (6) is provided with a threaded connection hole (61) and said diaphragm (7) is provided with a threaded connection post (71) for fitting with said threaded connection hole (61).

5. A low pressure opening diaphragm valve according to claim 1, wherein a support (21) is provided in the valve cover (2) for stabilising the valve stem (5) for movement.