CN214466287U

CN214466287U - Internal connection type pneumatic diaphragm valve

Info

Publication number: CN214466287U
Application number: CN202120354898.8U
Authority: CN
Inventors: 吴金龙; 方桂荣; 张润鑫; 吕育壮
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-10-22
Anticipated expiration: 2031-02-08

Abstract

The utility model relates to the field of valves, especially, relate to pneumatic diaphragm valve of inner connection formula, which comprises a valve body, be equipped with the medium entry in the valve body, the valve pocket of medium export and intercommunication medium entry and medium export, be equipped with first soft diaphragm and the soft diaphragm of second in the valve pocket, form first plenum between the edge of first soft diaphragm and the valve pocket inner wall upside, form second plenum between the edge of the soft diaphragm of second and the valve pocket inner wall downside, be linked together through the interface channel between first plenum and the second plenum, be equipped with the joint air vent on the interface channel, be equipped with the seal receptacle between first plenum and the second plenum outside, when first plenum is full of high-pressure gas, first soft diaphragm hugs closely the seal receptacle upper surface, the soft diaphragm of second hugs closely the seal receptacle lower surface. The utility model provides a first soft diaphragm and the soft diaphragm of second both regard as drive unit, regard as sealed unit again, simple structure, it is sealed reliable and drive stroke short, it is fast to open and close response speed.

Description

Internal connection type pneumatic diaphragm valve

[ technical field ] A method for producing a semiconductor device

The application relates to the field of valves, in particular to an internal connection type pneumatic diaphragm valve.

[ background of the invention ]

The pneumatic diaphragm valve is a special type of cut-off valve, and its opening and closing member is a diaphragm made of soft material, and separates the inner cavity of valve body from the inner cavity of valve cover and driving component. The existing pneumatic diaphragm valve mainly realizes the opening and closing of a valve body by driving a valve clack through a valve rod, and has a complex structure and a slow opening and closing response speed.

[ summary of the invention ]

The utility model provides an interior connection formula pneumatic diaphragm valve, outside air supply passes through joint air vent and interface channel with first, two pneumatic chambers realize the internal connection, first soft diaphragm and the soft diaphragm of second both regard as drive unit, regard as sealed unit again, simple structure, it is sealed reliable and drive stroke short, it is fast to open and close response speed.

The application is realized by the following technical scheme:

the internal connection type pneumatic diaphragm valve comprises a valve body, wherein a medium inlet, a medium outlet and a valve cavity communicated with the medium inlet and the medium outlet are arranged in the valve body, a first soft diaphragm and a second soft diaphragm are arranged in the valve cavity, a first air pressure chamber is formed between the edge of the first soft diaphragm and the upper side of the inner wall of the valve cavity, a second air pressure chamber is formed between the edge of the second soft diaphragm and the lower side of the inner wall of the valve cavity, the first air pressure chamber and the second air pressure chamber are communicated through a connecting channel, a combined vent hole is formed in the connecting channel, a sealing seat is arranged between the outer portion of the first air pressure chamber and the outer portion of the second air pressure chamber, when the first air pressure chamber is filled with high-pressure gas, the first soft diaphragm is tightly attached to the upper surface of the sealing seat, and the second soft diaphragm is tightly attached to the lower surface of the sealing seat.

In the internally connected pneumatic diaphragm valve, the middle part of the first soft diaphragm is an elastic concave part which is concave towards the inner wall of the valve cavity.

In the internally-connected pneumatic diaphragm valve described above, the material of the first soft diaphragm is an elastic rubber.

In the internally connected pneumatic diaphragm valve, the first soft diaphragm includes a diaphragm body, and the front surface and the back surface of the diaphragm body are both provided with annular protrusions surrounded along the periphery.

The valve body comprises a valve core and a first valve cover, a first mounting opening is formed in the valve core, the edge of the first soft diaphragm is pressed on the periphery of the first mounting opening by the first valve cover, and sealing grooves corresponding to the annular protrusions are formed in the opposite side faces of the valve core and the first valve cover.

In the internally connected pneumatic diaphragm valve, the inner side of the first valve cover is provided with an air guide groove extending from the connecting channel to the center of the inner side of the first valve cover.

In the internally connected pneumatic diaphragm valve, the first valve cover is provided with an inspection hole and a plug screw detachably installed in the inspection hole for closing the inspection hole.

In the internally connected pneumatic diaphragm valve, the first soft diaphragm is a rubber sheet having an inner layer provided with cotton yarn.

The internal connection type pneumatic diaphragm valve comprises a sealing seat and a sealing ring, wherein the sealing seat comprises a seat cylinder and reinforcing ribs, the seat cylinder is connected with the inner walls of two opposite sides of the valve body, and the reinforcing ribs are connected with two opposite sides of the inner wall of the seat cylinder.

In the internally connected pneumatic diaphragm valve described above, the first soft diaphragm is provided with a diaphragm bead whose length direction is perpendicular to the medium entrance direction of the medium inlet on the side facing the seal seat, and the seal seat protrusion facing the diaphragm bead is provided on the upper surface of the seal seat.

Compared with the prior art, the method has the following advantages:

in the internally-connected pneumatic diaphragm valve provided by this embodiment, an external air source is connected to the first and second air pressure chambers through the joint vent hole and the connecting channel, after high-pressure air is introduced into the joint vent hole, the first air pressure chamber and the second air pressure chamber expand to drive the first soft diaphragm and the second soft diaphragm to be tightly attached to the sealing seat to form sealing, so as to close the pneumatic diaphragm valve, after the high-pressure air is discharged, the first air pressure chamber and the second air pressure chamber contract to drive the first soft diaphragm and the second soft diaphragm to leave the sealing seat, the medium inlet is communicated with the medium outlet, so as to open the pneumatic diaphragm valve, and the first soft diaphragm and the second soft diaphragm both serve as driving units and sealing units.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a half cross-sectional view of a front view of an internally connected pneumatic diaphragm valve according to an embodiment of the present application.

Figure 2 is a top view of an internally connected pneumatic diaphragm valve according to an embodiment of the present application.

Figure 3 is a left side view of an internally connected pneumatic diaphragm valve according to an embodiment of the present application.

Fig. 4 is an enlarged view of the portion a in fig. 1 according to the embodiment of the present application.

[ detailed description ] embodiments

In order to make the technical problems, technical solutions and advantageous effects solved by the present application more clear and obvious, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1 to 4, an internally connected pneumatic diaphragm valve provided in an embodiment of the present application includes a valve body 1, a medium inlet 2, a medium outlet 3, and a valve cavity 4 communicating the medium inlet 2 and the medium outlet 3 are disposed in the valve body 1, a first soft diaphragm 51 and a second soft diaphragm 52 are disposed in the valve cavity 4, a first pressure chamber 61 is formed between an edge of the first soft diaphragm 51 and an upper side of an inner wall of the valve cavity 4, a second pressure chamber 62 is formed between an edge of the second soft diaphragm 52 and a lower side of an inner wall of the valve cavity 4, the first pressure chamber 61 and the second pressure chamber 62 are communicated through a connecting passage 60, a joint vent 601 is disposed on the connecting passage 60, a seal seat 41 is disposed between an outer portion of the first pressure chamber 61 and an outer portion of the second pressure chamber 62, when the first pressure chamber 61 is filled with high-pressure gas, the first soft diaphragm 51 is tightly attached to an upper surface of the seal seat 41, second soft diaphragm 52 is tightly attached to the lower surface of seal holder 41.

As a preferable mode, the internally connected pneumatic diaphragm valve of the present embodiment is a double weir type structure, the external air source is internally connected to the first and second pneumatic chambers through the joint vent 601 and the connecting channel 60, after the high-pressure air is introduced into the joint vent 601, the first pneumatic chamber 61 and the second pneumatic chamber 62 expand to drive the first soft diaphragm 51 and the second soft diaphragm 52 to closely contact the sealing seat 41 to form a seal, thereby closing the pneumatic diaphragm valve, after the high-pressure air is discharged, the first pneumatic chamber 61 and the second pneumatic chamber 62 contract to drive the first soft diaphragm 51 and the second soft diaphragm 52 to leave the sealing seat 41, the medium inlet 2 is communicated with the medium outlet 3, thereby opening the pneumatic diaphragm valve, at this time, the medium can pass through the valve body, the diaphragm valve of the present application preferably uses water as the medium, the first soft diaphragm 51 and the second soft diaphragm 52 both serve as a driving unit and a sealing unit, the structure is simple, the sealing is reliable, the driving stroke is short, the opening and closing response speed is high, and the opening and closing response time is within 0.8S.

On the other hand, the inter-connected pneumatic diaphragm valve of the present embodiment can drive the first soft diaphragm 51 and the second soft diaphragm 52 to operate simultaneously only by connecting one vent hole 601 and introducing the air source, and can ensure that the driving pressures of the first pneumatic chamber 61 and the second pneumatic chamber 62 are equal. The second air pressure chamber and the first air pressure chamber 61 are of a symmetrical structure, and the symmetrical air pressure chamber structure can enable the stress of the whole valve body to be more balanced, and is beneficial to ensuring the strength and the service life of the valve body.

In order to improve the ability of the soft diaphragm to return to the inner wall of the valve chamber 4, the middle of the first soft diaphragm 51 is an elastic concave portion 50 recessed towards the inner wall of the valve chamber 4. Of course, the first soft diaphragm and the second soft diaphragm are also symmetrically arranged and made of elastic rubber. The adopted rubber diaphragm has good rebound resilience, wear resistance, corrosion resistance and ageing resistance, and is sealed and has no leakage when the pneumatic driving pressure is 0.15-0.25 Mpa higher than the medium pressure of the pipeline; the soft diaphragm can be replaced after the use period, so that the cost is saved; when the valve body is opened, the gas in the first and second pressure chambers is thrown outwards, and the valve is quickly opened under the action of negative pressure of the thrown gas, medium pressure and the reset elasticity of the rubber diaphragm. Preferably, the interlayer in the first and second soft diaphragms is provided with cotton yarn, so that the high pressure strength can be borne.

Further, the first soft diaphragm 51 includes a diaphragm body 511, and both the front surface and the back surface of the diaphragm body 511 are provided with annular protrusions 512 around the periphery. The sealing performance of the valve body can be better enhanced.

Further, the valve body 1 includes a valve core 11 and a first valve cover 12, the valve core 11 is provided with a first installation opening, the first valve cover 12 compresses the edge of the first soft diaphragm 51 at the periphery of the first installation opening, and the opposite side surfaces of the valve core 11 and the first valve cover 12 are provided with sealing grooves 513 corresponding to the annular protrusions 512. Further, the valve core 11 has a support edge 112 protruding in the center direction of the first mounting hole. When the valve is assembled, the bolts for assembling the valve cover must be symmetrically tightened, so that the rubber diaphragm is uniformly pressed along the circumference of the valve cover to prevent leakage. In order to enhance the corrosion resistance, the surface of the valve body is sprayed with corrosion-resistant paint.

Further, the inside of the first valve cover 12 is provided with an air guide groove 123 extending from the connection passage 60 to the center of the inside of the first valve cover 12. The drive gas can be directed to fill the entire chamber faster.

Further, the first bonnet 12 is provided with an inspection hole 121 and a plug screw 122 detachably installed in the inspection hole 121 for closing the inspection hole 121. The inspection hole 121 can be used for inspecting whether the first soft diaphragm is damaged or not and leakage is facilitated to maintain.

In this embodiment, the sealing seat 41 includes a seat tube 411 connected to two opposite inner walls of the valve body 1 and a rib 412 connected to two opposite inner walls of the seat tube 411 to form a ridge structure.

In order to enhance the sealing performance between the first soft diaphragm 51 and the sealing seat 41, a diaphragm rib 514 with a length direction perpendicular to the medium inlet direction of the medium inlet 2 is disposed on one side of the first soft diaphragm 51 facing the sealing seat 41, and a sealing seat protrusion 413 opposite to the diaphragm rib 514 is disposed on the upper surface of the sealing seat 41.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present application. Furthermore, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the disclosure to the particular forms disclosed. Similar or identical methods, structures, etc. as used herein, or several technical inferences or substitutions made on the concept of the present application should be considered as the scope of the present application.

Claims

1. The internal connection type pneumatic diaphragm valve comprises a valve body (1), wherein a medium inlet (2), a medium outlet (3) and a valve cavity (4) communicated with the medium inlet (2) and the medium outlet (3) are arranged in the valve body (1), and the internal connection type pneumatic diaphragm valve is characterized in that a first soft diaphragm (51) and a second soft diaphragm (52) are arranged in the valve cavity (4), a first air pressure chamber (61) is formed between the edge of the first soft diaphragm (51) and the upper side of the inner wall of the valve cavity (4), a second air pressure chamber (62) is formed between the edge of the second soft diaphragm (52) and the lower side of the inner wall of the valve cavity (4), the first air pressure chamber (61) is communicated with the second air pressure chamber (62) through a connection channel (60), a combined vent hole (601) is arranged on the connection channel (60), and a sealing seat (41) is arranged between the outer portions of the first air pressure chamber (61) and the second air pressure chamber (62), when the first air pressure chamber (61) is filled with high-pressure gas, the first soft diaphragm (51) is tightly attached to the upper surface of the sealing seat (41), and the second soft diaphragm (52) is tightly attached to the lower surface of the sealing seat (41).

2. The internally connected pneumatic diaphragm valve of claim 1, wherein the middle portion of the first soft diaphragm (51) is an elastic recess (50) recessed toward the inner wall of the valve chamber (4).

3. The inter-connected pneumatic diaphragm valve of claim 1, wherein the material of the first soft diaphragm (51) is an elastic rubber.

4. The internally connected pneumatic diaphragm valve of claim 1, wherein the first soft diaphragm (51) comprises a diaphragm body (511), and wherein the diaphragm body (511) is provided with a circumferentially surrounding annular protrusion (512) on both the front and back sides thereof.

5. The internally-connected pneumatic diaphragm valve of claim 4, wherein the valve body (1) comprises a valve core (11) and a first valve cover (12), the valve core (11) is provided with a first mounting opening, the first valve cover (12) presses the edge of the first soft diaphragm (51) to the periphery of the first mounting opening, and opposite sides of the valve core (11) and the first valve cover (12) are provided with sealing grooves (513) corresponding to the annular protrusions (512).

6. The internally connected pneumatic diaphragm valve of claim 5, wherein the inside of the first valve cover (12) is provided with an air guide groove (123) extending from the connection passage (60) to the center of the inside of the first valve cover (12).

7. The internally-connected pneumatic diaphragm valve of claim 5, wherein the first valve cover (12) is provided with an inspection hole (121) and a plug screw (122) detachably installed in the inspection hole (121) for closing the inspection hole (121).

8. The internally connected pneumatic diaphragm valve of claim 5, wherein the first soft diaphragm (51) is a rubber sheet with an inner layer provided with cotton yarn.

9. The internally-connected pneumatic diaphragm valve of claim 1, wherein the sealing seat (41) comprises a seat cylinder (411) connected to the inner walls of the valve body (1) at opposite sides thereof and ribs (412) connected to the inner walls of the seat cylinder (411) at opposite sides thereof.

10. The internally-connected pneumatic diaphragm valve of claim 1, wherein the first soft diaphragm (51) is provided with a diaphragm bead (514) having a length direction perpendicular to a medium inlet direction of the medium inlet (2) on a side facing the sealing seat (41), and an upper surface of the sealing seat (41) is provided with a sealing seat protrusion (413) opposite to the diaphragm bead (514).