CN212509630U - Fast-assembling straight-through diaphragm valve - Google Patents
Fast-assembling straight-through diaphragm valve Download PDFInfo
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- CN212509630U CN212509630U CN202020453982.0U CN202020453982U CN212509630U CN 212509630 U CN212509630 U CN 212509630U CN 202020453982 U CN202020453982 U CN 202020453982U CN 212509630 U CN212509630 U CN 212509630U
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Abstract
The utility model relates to a fast-assembling straight-through diaphragm valve, which comprises a valve body, a valve clack, a valve cover, a valve rod and a hand wheel; the method is characterized in that: the inner cavity of the valve body adopts a straight-through structure, and a bowl-shaped valve cavity is arranged between the inlet channel and the outlet channel of the valve body; the valve clack consists of a valve core and a flexible composite membrane and is provided with a sealing surface which is mutually matched with the bowl-shaped valve cavity; when the valve clack is opened, no dead angle exists in the valve cavity, the flow resistance is small, no medium is retained in the valve cavity, and the cross contamination of the medium is avoided.
Description
Technical Field
The utility model belongs to the valve field especially relates to a diaphragm valve.
Background
The diaphragm valve is used for special medium working conditions such as low temperature, low pressure, corrosivity and the like, the opening and closing of the valve are controlled by utilizing the diaphragm, the valve cover, the valve rod and other parts are isolated from the medium by the diaphragm, the valve rod, the valve cover, the middle cavity sealing filler and other parts are prevented from being corroded by the medium, and the middle cavity is prevented from leaking. In addition, the contact part between the pipeline and the medium is few, the pipeline is easy to wash, the cross contamination of the medium can be effectively prevented, and the pipeline is particularly suitable for material conveying of a medicine production process pipeline. The fluorine-lined diaphragm valve with the patent number of CN201821606178.0 comprises a valve body, a valve cover and a valve rod, wherein a blocking part protruding upwards is arranged in an inner cavity of the valve body, one end of the valve rod is provided with a top block capable of moving up and down, a rubber diaphragm is arranged at the joint of the valve cover and the valve body, and the top block is abutted against the upper surface of the rubber diaphragm to control the rubber diaphragm to be close to the blocking part to realize sealing closure or keep away from the blocking part to realize passage. The main disadvantages are: the inner cavity of the valve body is sealed by the upward convex blocking part and the diaphragm which are matched with each other, and in the opening state, the upward convex blocking part has larger flow resistance to fluid, and medium residue exists in the inlet side channel of the upward convex blocking part, so that cross contamination is generated to secondary conveying medium.
Disclosure of Invention
The utility model discloses shortcoming to prior art exists provides a flow resistance is little, the valve pocket does not have the medium to be detained, the pollution-free fast-assembling through diaphragm valve of medium.
The technical proposal of the utility model comprises a valve body, a valve clack, a valve cover, a valve rod and a hand wheel; the method is characterized in that: the inner cavity of the valve body adopts a straight-through structure, and a bowl-shaped valve cavity is arranged between the inlet channel and the outlet channel of the valve body; the valve clack consists of a valve core and a flexible composite membrane and is provided with a sealing surface which is mutually matched with the bowl-shaped valve cavity; the flexible composite diaphragm consists of a rubber diaphragm and a tetrafluoro diaphragm, the tetrafluoro diaphragm is tightly attached to the outer surface of the rubber diaphragm, the tetrafluoro diaphragm and the rubber diaphragm form a bowl-shaped composite sealing surface with the same curved surface as the bowl-shaped valve cavity, and the circumferential surface of the upper end of the bowl-shaped composite sealing surface is pressed between the upper plane of the bowl-shaped valve cavity and the lower end surface of the valve cover; the center of the PTFE diaphragm is provided with a connecting cavity which is convex upwards, the connecting cavity is connected with the center of the lower end surface of the valve core through a connecting rod, the center of the upper end surface of the valve core is connected with the lower end of the valve rod, the upper end of the valve rod is connected with a hand wheel through a valve rod nut, and an anti-rotation device is arranged between the valve core and the valve cover; the center of the lower surface of the valve core is provided with a bowl-shaped curved surface which has the same curved surface as the inner surface of the bowl-shaped valve cavity in the direction vertical to the central line of the valve body passage.
In the technical scheme, the anti-rotation device is formed by matching a radial guide convex shoulder on the valve core and an axial guide groove on the valve cover; the radial guide convex shoulder on the valve core and the axial guide groove of the valve cover are positioned in the direction vertical to the central line of the valve body channel.
In the technical scheme, the center of the lower surface of the tetrafluoro membrane is provided with a convex rib which is matched with the inner surface of the bowl-shaped valve cavity in the direction vertical to the central line of the valve body passage.
In the technical scheme, the tetrafluoro lining is arranged in the inlet and outlet channel of the valve body and the valve cavity, the tetrafluoro lining extends into the radial end surface of the inlet and outlet connecting flange of the valve body, and tetrafluoro lining positioning grooves which are concentric with the channel of the valve body are respectively arranged in the end surfaces of the inlet flange and the outlet flange; the tetrafluoro lining extends to the upper port of the bowl-shaped valve cavity, and the outer ring surface of the upper end of the tetrafluoro lining is pressed between the tetrafluoro membrane and the upper end surface of the bowl-shaped valve cavity.
In the above technical scheme, be equipped with on the valve body in the bowl-shaped valve pocket port outside with the endocentric circular slot of valve rod, be equipped with in the tetrafluoro diaphragm upper end outside lower plane with the circular slot inlays the circular bulge loop of dress connection each other, adopt circular slot and bulge loop to inlay dress each other and connect between tetrafluoro diaphragm upper end outside upper surface and the rubber diaphragm upper end outside lower plane, adopt circular slot and bulge loop to inlay the dress connection each other between rubber diaphragm upper end outside upper surface and the valve gap lower terminal surface.
In above technical scheme, the valve rod upper end is equipped with aperture indicating device, this indicating device comprises the pilot lever of taking red indicator sleeve and green indicator sleeve, indicator lever lower extreme fixed connection is in the valve rod upper end, red indicator sleeve sets up at the outer disc of pilot lever lower part, green indicator sleeve sets up at the outer disc of pilot lever upper portion, the outer disc and the valve stem nut hole clearance fit of red indicator sleeve and green indicator sleeve, the outer disc and the hand wheel hole clearance fit of valve stem nut, valve stem nut and hand wheel have lock nut to install on the valve bonnet.
Compared with the prior art, the utility model beneficial effect be: the bowl-shaped valve cavity, the valve clack formed by the bowl-shaped composite membrane and the valve core are arranged in the straight-through valve cavity and matched with each other to form a sealing pair, when the valve clack is opened, no dead angle exists in the valve cavity, the flow resistance is small, no medium is retained in the valve cavity, and the cross contamination of the medium is avoided.
Drawings
Fig. 1 is a schematic structural diagram of the present invention. .
Fig. 2 is a sectional view of the structure of the present invention in the direction of a-a in fig. 1.
Detailed Description
The fast-assembling straight-through diaphragm valve shown in fig. 1 comprises a valve body 1, a valve clack, a valve cover 8, a valve rod 7 and a hand wheel 14; the method is characterized in that: the inner cavity of the valve body 1 adopts a straight-through structure, so that the problems of flow resistance and medium detention caused by the fact that a bulge structure is arranged in a valve body channel and matched with a diaphragm in the prior art are solved, and a bowl-shaped valve cavity is arranged between an inlet channel and an outlet channel of the valve body 1; the valve clack consists of a valve core 3 and a flexible composite membrane and is provided with a sealing surface which is matched with the bowl-shaped valve cavity; the flexible composite diaphragm consists of a rubber diaphragm 4 and a tetrafluoro diaphragm 2, the tetrafluoro diaphragm 2 is tightly attached to the outer surface of the rubber diaphragm 4, the two constitute a bowl-shaped composite sealing surface with the same curved surface as the bowl-shaped valve cavity, and the upper end circumferential surface of the bowl-shaped composite sealing surface is pressed between the upper plane of the bowl-shaped valve cavity and the lower end surface of the valve cover 8; the center of the PTFE membrane 2 is provided with a connecting cavity which is convex upwards, the connecting cavity is connected with the center of the lower end face of the valve core 3 through a connecting rod 23, a radial annular convex shoulder at the lower end of the connecting rod 23 is injected into the connecting cavity of the PTFE membrane 2 in a pressing way, the upper end of the connecting rod 23 movably penetrates through a connecting hole at the lower end face of the valve core 3 and is positioned in the connecting hole through a cylindrical pin 20, so that the connecting hole of the valve core 3 can move axially relative to the connecting rod 23, the center of the upper end face of the valve core 3 is connected with the lower end of a valve rod 7, the upper end of the valve rod 7 is connected with a hand wheel 14 through a valve rod nut 19, an anti-; when the valve rod 7 pulls the valve core 3 to rise, the flexible deformation characteristic of a flexible composite membrane consisting of the tetrafluoro membrane 2 and the rubber membrane 4 is utilized, the flexible composite membrane is pulled to rise through the connecting rod 23, the bowl-shaped composite sealing surface of the flexible composite membrane is separated from the bowl-shaped valve cavity of the valve body 1, and the valve is opened; on the contrary, when the valve rod 7 pushes the valve core 3 to move downwards, the lower end face of the valve core 3 downwards compresses the bowl-shaped composite sealing surface to be in sealing fit with the bowl-shaped valve cavity of the valve body 1, and the valve is closed; the center of the lower surface of the valve core 3 is provided with a bowl-shaped curved surface which has the same curved surface as the inner surface of the bowl-shaped valve cavity in the direction vertical to the central line of the channel of the valve body 1, so that when the valve is closed, the bowl-shaped composite sealing surface is in better sealing fit with the bowl-shaped valve cavity of the valve body 1, as shown in figure 2.
The anti-rotation device is formed by matching a radial guide convex shoulder on the valve core 3 and an axial guide groove on the valve cover 8; the radial guide shoulder on the valve core 3 and the axial guide groove of the valve cover 8 are positioned in the direction vertical to the central line of the channel of the valve body 1. The radial and axial directions refer to the radial and axial directions of the valve rod 7.
And a convex rib 22 matched with the inner surface of the bowl-shaped valve cavity is arranged at the center of the lower surface of the PTFE membrane 2 in the direction vertical to the central line of the channel of the valve body 1, so that the sealing specific pressure of the bowl-shaped composite sealing surface and the bowl-shaped valve cavity in a sealing matching state is increased.
The PTFE lining 21 is arranged in the inlet and outlet channels of the valve body 1 and the bowl-shaped valve cavity, the PTFE lining 21 extends into the radial end faces of the inlet and outlet connecting flanges of the valve body 1, PTFE lining positioning grooves which are concentric with the channels of the valve body 1 are respectively arranged in the end faces of the inlet flange and the outlet flange, the bonding strength of the PTFE lining 21 and the inner walls of the channels of the valve body 1 is improved, and the PTFE lining is prevented from falling off; the PTFE liner 21 extends to the upper port of the bowl-shaped valve cavity, and the outer ring surface of the upper end of the PTFE liner is pressed between the PTFE diaphragm 2 and the upper end surface of the bowl-shaped valve cavity to prevent the liner layer in the bowl-shaped valve cavity from falling off.
Be equipped with on the valve body 1 in the calathiform valve pocket port outside with the endocentric circular slot of valve rod 7, be equipped with in the plane under 2 upper ends outsides of tetrafluoro diaphragm with the circular slot inlays the circular bulge loop of dress connection each other, adopt circular slot and bulge loop to inlay dress each other and connect between 2 upper ends outsides of tetrafluoro diaphragm upper end upper plane and the 4 upper ends outsides of rubber diaphragm lower plane, adopt circular slot and bulge loop to inlay dress each other and connect between the terminal surface under 4 upper ends outsides of rubber diaphragm and the valve gap 8, improve flexible composite diaphragm installation reliability, valve gap 8 is terminal surface under 1 calathiform valve pocket of valve body by bolt 6, nut 5 fixed mounting.
The upper end of the valve rod 7 is provided with an opening indicating device, the indicating device is composed of an indicating rod 17 with a red indicating sleeve 12 and a green indicating sleeve 13, the lower end of the indicating rod 17 is fixedly connected to the upper end of the valve rod 7, the red indicating sleeve 12 is arranged on the outer circular surface of the lower part of the indicating rod 17, the green indicating sleeve 13 is arranged on the outer circular surface of the upper part of the indicating rod 17, the outer circular surfaces of the red indicating sleeve 12 and the green indicating sleeve 13 are in movable fit with an inner hole of a valve rod nut 19, the outer circular surface of the valve rod nut 19 is in interference fit with an inner hole of a hand wheel 14, and the valve rod. The indicating rod 17 and the valve rod 7 are connected with each other through a screw hole and a screw rod, an adjusting gasket 11 is arranged between the lower end face of the indicating rod 17 and the upper end face of the valve rod 7, and the opening indicating position of the indicating rod 17 is adjusted. The locking nut 16 is connected with the external thread on the valve rod nut 19 by adopting internal thread, and a sealing gasket 15 and a sealing ring 18 are respectively arranged between the locking nut 16 and the hand wheel 14 as well as between the locking nut 16 and the indicating rod 17, so that dust is prevented from entering the valve rod nut 19. A shaft sleeve 9 is arranged between the outer circular surface of the valve rod nut 19 and the inner hole wall of the upper end of the valve cover 8, and a gasket 10 is arranged between the lower end surface of the hand wheel 14 and the upper end surface of the valve cover 8, so that the rotating friction force between the hand wheel 14 and the valve rod nut 19 is reduced.
The anti-rotation device between the valve rod 7 and the valve cover 8 is formed by mutually matching guide pins and guide grooves which are respectively arranged on the valve rod 7 and the valve cover 8.
Claims (7)
1. A fast-assembling straight-through diaphragm valve comprises a valve body (1), a valve clack, a valve cover (8), a valve rod (7) and a hand wheel (14); the method is characterized in that: the inner cavity of the valve body (1) adopts a straight-through structure, and a bowl-shaped valve cavity is arranged between an inlet channel and an outlet channel of the valve body (1); the valve clack consists of a valve core (3) and a flexible composite membrane and is provided with a sealing surface which is matched with the bowl-shaped valve cavity; the flexible composite diaphragm consists of a rubber diaphragm (4) and a tetrafluoro diaphragm (2), the tetrafluoro diaphragm (2) is tightly attached to the outer surface of the rubber diaphragm (4), the rubber diaphragm and the tetrafluoro diaphragm form a bowl-shaped composite sealing surface with the same curved surface as the bowl-shaped valve cavity, and the circumferential surface of the upper end of the bowl-shaped composite sealing surface is pressed between the upper plane of the bowl-shaped valve cavity and the lower end surface of the valve cover (8); the center of the PTFE membrane (2) is provided with a connecting cavity which protrudes upwards, the connecting cavity is connected with the center of the lower end face of the valve core (3) through a connecting rod (23), a radial annular convex shoulder at the lower end of the connecting rod (23) is pressed and injected in the connecting cavity of the PTFE membrane (2), the upper end of the connecting rod (23) movably penetrates through a connecting hole at the lower end face of the valve core (3) and is positioned in the connecting hole through a cylindrical pin (20), the center of the upper end face of the valve core (3) is connected with the lower end of the valve rod (7), the upper end of the valve rod (7) is connected with a hand wheel (14) through a valve rod nut (19), and an anti-rotation device is; the center of the lower surface of the valve core (3) is provided with a bowl-shaped curved surface which has the same curved surface as the inner surface of the bowl-shaped valve cavity in the direction vertical to the central line of the channel of the valve body (1).
2. The fast-assembling straight-through diaphragm valve of claim 1, wherein: the anti-rotation device is formed by matching a radial guide convex shoulder on the valve core (3) with an axial guide groove on the valve cover (8); the radial guide convex shoulder on the valve core (3) and the axial guide groove of the valve cover (8) are positioned in the direction vertical to the central line of the channel of the valve body (1).
3. The fast-assembling straight-through diaphragm valve of claim 1 or 2, wherein: and a convex rib (22) matched with the inner surface of the bowl-shaped valve cavity is arranged at the center of the lower surface of the tetrafluoro membrane (2) in the direction vertical to the central line of the channel of the valve body (1).
4. The fast-assembling straight-through diaphragm valve of claim 1 or 2, wherein: the inlet and outlet channels of the valve body (1) and the bowl-shaped valve cavity are internally provided with tetrafluoro linings (21), the tetrafluoro linings (21) extend into the radial end surfaces of the inlet and outlet connecting flanges of the valve body (1), and tetrafluoro lining positioning grooves which are concentric with the channels of the valve body (1) are respectively arranged in the end surfaces of the inlet flange and the outlet flange; the tetrafluoro liner (21) extends to the upper port of the bowl-shaped valve cavity, and the outer ring surface of the upper end of the tetrafluoro liner is pressed between the tetrafluoro membrane (2) and the upper end surface of the bowl-shaped valve cavity.
5. The fast-assembling straight-through diaphragm valve of claim 3, wherein: the inlet and outlet channels of the valve body (1) and the bowl-shaped valve cavity are internally provided with tetrafluoro linings (21), the tetrafluoro linings (21) extend into the radial end surfaces of the inlet and outlet connecting flanges of the valve body (1), and tetrafluoro lining positioning grooves which are concentric with the channels of the valve body (1) are respectively arranged in the end surfaces of the inlet flange and the outlet flange; the tetrafluoro liner (21) extends to the upper port of the bowl-shaped valve cavity, and the outer ring surface of the upper end of the tetrafluoro liner is pressed between the tetrafluoro membrane (2) and the upper end surface of the bowl-shaped valve cavity.
6. The fast-assembling straight-through diaphragm valve of claim 1, 2 or 5, wherein: be equipped with on valve body (1) in the bowl shape valve pocket port outside with valve rod (7) endocentric circular slot, tetrafluoro diaphragm (2) upper end outside in the plane down be equipped with the circular slot inlays the circular bulge loop of dress connection each other, adopt circular slot and bulge loop to inlay the dress each other and be connected between tetrafluoro diaphragm (2) upper end outside upper surface and rubber diaphragm (4) upper end outside lower plane, adopt circular slot and bulge loop to inlay the dress each other and be connected between rubber diaphragm (4) upper end outside upper surface and valve gap (8) lower terminal surface.
7. The fast-assembling straight-through diaphragm valve of claim 4, wherein: be equipped with on valve body (1) in the bowl shape valve pocket port outside with valve rod (7) endocentric circular slot, tetrafluoro diaphragm (2) upper end outside in the plane down be equipped with the circular slot inlays the circular bulge loop of dress connection each other, adopt circular slot and bulge loop to inlay the dress each other and be connected between tetrafluoro diaphragm (2) upper end outside upper surface and rubber diaphragm (4) upper end outside lower plane, adopt circular slot and bulge loop to inlay the dress each other and be connected between rubber diaphragm (4) upper end outside upper surface and valve gap (8) lower terminal surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020453982.0U CN212509630U (en) | 2020-04-01 | 2020-04-01 | Fast-assembling straight-through diaphragm valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020453982.0U CN212509630U (en) | 2020-04-01 | 2020-04-01 | Fast-assembling straight-through diaphragm valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212509630U true CN212509630U (en) | 2021-02-09 |
Family
ID=74441895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020453982.0U Active CN212509630U (en) | 2020-04-01 | 2020-04-01 | Fast-assembling straight-through diaphragm valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212509630U (en) |
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2020
- 2020-04-01 CN CN202020453982.0U patent/CN212509630U/en active Active
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