CN219510171U - Corrosion-resistant rubber-lined diaphragm valve - Google Patents

Abstract

The utility model discloses a corrosion-resistant rubber-lined diaphragm valve, which comprises a valve body, a valve cover and a valve rod, wherein the valve cover and the valve rod are arranged on the valve body, a diaphragm is arranged between the valve body and the valve cover, a valve clack cavity which is penetrated up and down is arranged in the valve cover, the upper end and the lower end of the valve clack cavity are tightening ends which incline inwards, the lower end of the valve rod penetrates through the valve cover and is connected with a sealing valve clack, the sealing valve clack is arranged in the valve clack cavity in a sliding manner, the sealing valve clack can be in airtight fit with the two tightening ends of the valve clack cavity, and the lower end of the sealing valve clack is in contact with the diaphragm; the utility model provides a corrosion-resistant rubber-lined diaphragm valve, which can still block a medium after a diaphragm is corroded and damaged, has good tightness and can avoid the problems that parts such as a valve rod and the like are corroded by the medium and the medium leaks out.

Description

Corrosion-resistant rubber-lined diaphragm valve

Technical Field

The utility model relates to a corrosion-resistant rubber-lined diaphragm valve.

Background

The opening and closing part is a diaphragm made of soft material and separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving part, so that the valve is called a diaphragm valve. The outstanding feature is that the diaphragm separates the lower valve body cavity from the upper valve cover cavity, so that the valve rod, valve clack and other parts above the diaphragm are not corroded by medium, the packing sealing structure is omitted, and medium leakage is avoided.

Through searching, it is found that in the Chinese patent with the publication number of CN206723496U, a rubber lining diaphragm valve is disclosed, the valve comprises a valve body, a valve cover and a valve rod, wherein the valve cover and the valve rod are arranged on the valve body, a diaphragm is arranged between the valve body and the valve cover, a valve clack fixedly connected with the valve rod is fixed on the diaphragm, the lower end of the valve rod is in contact with the diaphragm, the upper end of the valve rod extends out of the valve cover, the upper end of the valve cover is further rotationally connected with a hand wheel, the hand wheel is rotationally connected to the top end of the valve cover through a locking nut, a valve rod nut is further arranged at the contact part between the valve rod and the upper end of the valve cover, and an oil cup is arranged at the lower end of the valve cover. The utility model has simple structure, can resist certain temperature and has good corrosion resistance.

However, in the rubber-lined diaphragm valve, the diaphragm is damaged due to the influence of corrosion after long-time use, so that the inner cavity of the valve body is communicated with the inner cavity of the valve cover, parts such as a valve rod and the like above the diaphragm are corroded by a medium, and the sealing performance of the diaphragm valve is reduced, so that the medium leaks out.

Disclosure of Invention

The utility model aims to provide a corrosion-resistant rubber-lined diaphragm valve, which can still block a medium after the diaphragm is corroded and damaged, so that the problems that parts such as a valve rod are corroded by the medium and the medium leaks out are avoided, and the rubber-lined diaphragm valve has good corrosion resistance and sealing performance.

In order to achieve the above purpose, the technical scheme of the utility model is to design a corrosion-resistant rubber-lined diaphragm valve, which comprises a valve body, a valve cover and a valve rod, wherein the valve cover and the valve rod are arranged on the valve body, a diaphragm is arranged between the valve body and the valve cover, a valve disc cavity which is penetrated up and down is arranged in the valve cover, the upper end and the lower end of the valve disc cavity are tightening ends which incline inwards, the lower end of the valve rod penetrates through the valve cover and is connected with a sealing valve disc, the sealing valve disc is arranged in the valve disc cavity in a sliding manner, the sealing valve disc can be in airtight fit with the two tightening ends of the valve disc cavity, and the lower end of the sealing valve disc is in contact with the diaphragm.

Preferably, the sealing valve clack is an anti-corrosion rubber piece, the sealing valve clack comprises an upper propping part and a lower propping part which are conical, the upper propping part can be in airtight fit with the upper tightening end of the valve clack cavity, the lower propping part can be in airtight fit with the lower tightening end of the valve clack cavity, and the lower propping part extends into the valve body.

Preferably, a flow limiting protrusion matched with the diaphragm to form a closed state is arranged in the valve body, and the lower abutting part can be pressed against the flow limiting protrusion.

Preferably, the upper end of the valve rod is connected with a hand wheel, the hand wheel is positioned outside the valve cover, an external thread is arranged on the valve rod, a valve rod nut is arranged at the upper end of the valve cover, and the valve rod is in threaded connection with the valve rod nut.

Preferably, a connecting block is arranged at the connecting end of the valve rod and the sealing valve clack, a limiting groove is formed in the sealing valve clack, and the connecting block is rotatably arranged in the limiting groove.

The utility model has the advantages and beneficial effects that:

1. according to the utility model, the valve clack cavity and the sealing valve clack which can be in airtight fit with the upper and lower tightening ends of the valve clack cavity are arranged, so that the sealing valve clack can still block a medium under the state that the rubber lining diaphragm valve is kept open or closed after the diaphragm is damaged due to corrosion influence, and the problems that parts such as a valve rod and the like are corroded by the medium and the medium leaks out are avoided, and the rubber lining diaphragm valve has good corrosion resistance and sealing performance.

2. According to the utility model, the lower abutting part of the sealing valve clack is in airtight fit with the lower tightening end of the valve clack cavity, and the lower abutting part of the sealing valve clack is pressed against the current limiting protrusion, so that the sealing valve can still keep the closing state of the rubber lining diaphragm valve after the diaphragm is corroded and damaged in the closing state of the rubber lining diaphragm valve, and the failure of the valve body is avoided.

3. According to the utility model, through the matching arrangement of the connecting block and the limiting groove, when the rubber lining diaphragm valve is opened or closed, the sealing valve clack directly ascends or descends without following the rotation of the valve rod, so that the sealing valve clack only receives force in the up-down direction, thereby reducing the rotation friction between the sealing valve clack and the diaphragm, and prolonging the service life of the diaphragm.

Drawings

Fig. 1 is a schematic view of the utility model with an adhesive lined diaphragm valve open.

Fig. 2 is a schematic illustration of the closing of the rubber lined diaphragm valve of the present utility model.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

The technical scheme of the utility model is as follows:

as shown in fig. 1 and 2, a corrosion-resistant rubber-lined diaphragm valve comprises a valve body 1, a valve cover 2 and a valve rod 15, wherein the valve cover 2 is arranged on the valve body 1, a diaphragm 3 is arranged between the valve body 1 and the valve cover 2, a valve clack cavity 4 which is penetrated up and down is arranged in the valve cover 2, the upper end and the lower end of the valve clack cavity 4 are tightening ends which incline inwards, the lower end of the valve rod 15 penetrates through the valve cover 2 and is connected with a sealing valve clack 5, the sealing valve clack 5 is slidably arranged in the valve clack cavity 4, the sealing valve clack 5 can be in airtight fit with the two tightening ends of the valve clack cavity 4, and the lower end of the sealing valve clack 5 is in contact with the diaphragm 3.

Preferably, the sealing valve clack 5 is an anti-corrosion rubber piece, the sealing valve clack 5 comprises an upper abutting part 6 and a lower abutting part 7 which are conical, the upper abutting part 6 can be in airtight fit with an upper tightening end 8 of the valve clack cavity 4, the lower abutting part 7 can be in airtight fit with a lower tightening end 9 of the valve clack cavity 4, and the lower abutting part 7 extends into the valve body 1; the sealing valve clack 5 is beneficial to the airtight fit of the upper and lower tightening ends of the valve clack cavity 4, and after the diaphragm is corroded and damaged, the sealing valve clack 5 blocks the medium, so that the problems that parts such as the valve rod 15 are corroded by the medium and the medium leaks out are avoided.

Preferably, a flow limiting protrusion 10 which is matched with the diaphragm 3 to form a closed state is arranged in the valve body 1, and the lower abutting part 7 can be pressed against the flow limiting protrusion 10; the sealing valve clack 5 is beneficial to keeping the sealing state of the valve body 1, and the failure of the valve body 1 caused by the corrosion and the damage of the diaphragm 3 is avoided.

Preferably, the upper end of the valve rod 15 is connected with a hand wheel 11, the hand wheel 11 is positioned outside the valve cover 2, and a valve rod nut 12 is further arranged at the contact part between the valve rod 15 and the upper end of the valve cover 2; the valve rod 15 is more convenient to rotate, so that the rubber lining diaphragm valve can be opened and closed quickly.

Preferably, a connecting block 13 is arranged at the connecting end of the valve rod 15 and the sealing valve clack 5, a limiting groove 14 is formed in the sealing valve clack 5, and the connecting block 13 is rotatably arranged in the limiting groove 14; the sealing valve clack 5 is favorable for only receiving force in the vertical direction, so that the rotation friction between the sealing valve clack 5 and the diaphragm 3 is reduced, and the service life of the diaphragm 3 is prolonged.

After the diaphragm 3 is damaged due to corrosion influence, in the state that the rubber lining diaphragm valve is kept open, the upper abutting part 6 of the sealing valve clack 5 is in airtight fit with the upper tightening end 8 of the valve clack cavity 4, the sealing valve clack 5 blocks a medium in the valve body in the valve clack cavity 4, the problems that parts such as a valve rod 15 are corroded by the medium and the medium leaks out due to the corrosion damage of the diaphragm 3 are avoided, and the rubber lining diaphragm valve has good corrosion resistance and sealing performance; under the state that the rubber lining diaphragm valve is kept to be closed, the lower abutting part 7 of the sealing valve clack 5 is in airtight fit with the lower tightening end 9 of the valve clack cavity 4, the lower abutting part 7 extends to the inner pressure limiting protrusion 10 in the valve body 1, the sealing valve clack 5 separates the inner cavity of the valve body 1 from the inner cavity of the valve cover 2 and keeps the sealing state of the valve body 1, the failure of the valve body 1 caused by the corrosion and the damage of the diaphragm 3 is avoided, and the rubber lining diaphragm valve has good corrosion resistance and sealing performance.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (5)

1. The utility model provides a corrosion-resistant lining rubber diaphragm valve, includes valve body, valve gap and valve rod of setting on the valve body, valve body and valve gap between be equipped with diaphragm, its characterized in that: the valve cover is internally provided with a valve clack cavity which is vertically communicated, the upper end and the lower end of the valve clack cavity are tightening ends which incline inwards, the lower end of the valve rod penetrates through the valve cover and is connected with a sealing valve clack, the sealing valve clack is arranged in the valve clack cavity in a sliding manner, the sealing valve clack can be in airtight fit with the two tightening ends of the valve clack cavity, and the lower end of the sealing valve clack is in contact with the diaphragm.

2. The corrosion resistant rubber lined diaphragm valve of claim 1, wherein said sealing flap is an anti-corrosion rubber member, said sealing flap includes an upper abutment portion and a lower abutment portion in the form of a cone, said upper abutment portion being sealingly engageable with an upper tightening end of said flap cavity, said lower abutment portion being sealingly engageable with a lower tightening end of said flap cavity, and said lower abutment portion extending into said valve body.

3. A corrosion resistant rubber lined diaphragm valve of claim 2, wherein said valve body has a flow restricting projection therein for sealing with said diaphragm, said lower abutment being adapted to bear against said flow restricting projection.

4. A corrosion resistant rubber lined diaphragm valve according to claim 3, wherein the upper end of the valve stem is connected with a hand wheel, the hand wheel is located outside the valve cap, the valve stem is provided with external threads, the upper end of the valve cap is provided with a valve stem nut, and the valve stem is in threaded connection with the valve stem nut.

5. The corrosion-resistant rubber-lined diaphragm valve of claim 4, wherein a connecting block is arranged at the connecting end of the valve rod and the sealing valve clack, a limiting groove is formed in the sealing valve clack, and the connecting block is rotatably arranged in the limiting groove.