CN217951293U - Novel membrane plug valve - Google Patents
Novel membrane plug valve Download PDFInfo
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- CN217951293U CN217951293U CN202222263210.2U CN202222263210U CN217951293U CN 217951293 U CN217951293 U CN 217951293U CN 202222263210 U CN202222263210 U CN 202222263210U CN 217951293 U CN217951293 U CN 217951293U
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Abstract
The utility model relates to a new-type membrane stopper valve, central part and edge part integrated into one piece, the edge part is fixed for the valve body relatively down, cylinder drive central part reciprocates, the piston is located inside the cylinder body and separates into first cavity and second cavity with cylinder body internal partitioning, first cavity and second cavity are located the top and the below of piston respectively, the cylinder body is formed with first air vent, valve rod and piston fixed connection, the inside passageway that is formed with of valve rod, the passageway both ends of valve rod communicate with first air vent and second cavity respectively. The first vent hole is arranged at the top of the cylinder, the valve rod is used for air inlet and air outlet, and the joint does not need to be fixed on the side surface of the cylinder, so that the problem that the membrane plug valve occupies a larger space in the radial direction of the valve rod is solved; the valve rod is limited by sealing through the third sealing ring, the fourth sealing ring and the second sealing ring, the valve rod is positioned through the sealing retaining ring, and the soft and hard points are combined, so that the problem that the coaxiality of the valve rod and the cylinder body is high is solved.
Description
Technical Field
The utility model belongs to the technical field of the membrane stopper valve and specifically relates to a new-type membrane stopper valve.
Background
The existing pneumatic membrane plug valve adopts a cylinder to drive a membrane to move, so that the opening and closing of the membrane plug valve are controlled. The air cylinders adopted by the membrane plug valve are used for air intake and exhaust from the side (namely the radial direction of the valve rod), so that the joints are required to be fixed with the side of the air cylinders, the space occupied by the membrane plug valve in the radial direction of the valve rod is large, and the arrangement of the membrane plug valve is influenced in use.
Meanwhile, the existing valve rod (namely a piston rod) is in direct contact with and is in sliding connection with the cylinder body of the air cylinder, and the requirement on the coaxiality of the valve rod and the cylinder body is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, provide a new-type membrane cock valve, solved the great problem in the radial space that occupies of valve rod of membrane cock valve, solved the higher problem of valve rod and cylinder body axiality requirement.
A novel membrane plug valve comprising: the diaphragm comprises a central portion and an edge portion, the central portion and the edge portion are integrally formed, the edge portion is fixed relative to the lower valve body, the cylinder drives the central portion to move up and down, the cylinder comprises a cylinder body, a valve rod or a piston, the piston is located inside the cylinder body and divides the inside of the cylinder body into a first cavity and a second cavity, the first cavity and the second cavity are located above and below the piston respectively, a first vent hole is formed in the cylinder body, the valve rod is fixedly connected with the piston, a channel is formed inside the valve rod, and two ends of the channel of the valve rod are communicated with the first vent hole and the second cavity respectively.
On the basis of the technical scheme, the cylinder body of the air cylinder comprises a lower end cover, a cylinder body and an upper end cover, the two ends of the cylinder body are fixedly connected with the lower end cover and the upper end cover respectively, the spring is located in the first cavity, the two ends of the spring are in contact with the upper end cover and the piston respectively, the fourth sealing ring is sleeved on the outer side of the piston, and the fourth sealing ring is in sliding connection with the inner wall of the cylinder body.
On the basis of the technical scheme, the valve rod sealing device further comprises a third sealing ring, a communication hole is formed in the upper end cover, the first communication hole is formed in the upper end cover and communicated with the first communication hole, the third sealing ring is fixed in the communication hole, the inner side and the outer side of the third sealing ring are respectively attached to the valve rod and the inner wall of the communication hole, and the communication hole is communicated with a channel of the valve rod.
On the basis of the technical scheme, the channel of the valve rod comprises an axial blind hole and a radial through hole, the axial blind hole is communicated with the communicating hole, and two ends of the radial through hole are respectively communicated with the axial blind hole and the second cavity; the upper end cover is provided with a second vent hole.
On the basis of the technical scheme, the sealing device further comprises a sealing retaining ring and a second sealing ring, the section of the sealing retaining ring is rectangular, the inner side and the outer side of the sealing retaining ring are respectively attached to the valve rod and the lower end cover, the sealing retaining ring is fixed to the lower end cover, the valve rod is connected with the sealing retaining ring in a sliding mode, the inner side and the outer side of the second sealing ring are respectively attached to the valve rod and the lower end cover, and the second sealing ring is fixed to the lower end cover;
the sealing retaining ring is made of polytetrafluoroethylene.
On the basis of the technical scheme, the valve rod further comprises a screw, wherein an expansion part of the screw is inserted into the central part and fixedly connected with the central part, and the screw is in threaded connection with the valve rod; the upper end of the central part is attached to the lower end of the valve rod;
the lower end cover is fixedly connected with the lower valve body, and the edge part is clamped and fixed by the lower end cover and the lower valve body.
On the basis of the technical scheme, a third cavity is formed between the diaphragm and the lower end cover, a third vent hole is formed in the lower end cover, and the third cavity is communicated with the third vent hole.
On the basis of the technical scheme, the lower valve body is provided with an inlet, an outlet and a valve seat, the inlet is communicated with the outlet through the valve seat, the valve seat is provided with a first sealing conical surface, and the central part is provided with a second sealing conical surface matched with the first sealing conical surface; the diaphragm and the valve seat are both revolving bodies, and the diaphragm is made of elastic materials.
On the basis of the technical scheme, the diaphragm is made of polytetrafluoroethylene.
The utility model has the advantages of as follows: the first vent hole is formed in the top of the cylinder, the valve rod is used for air inlet and air outlet, a joint does not need to be fixed on the side face of the cylinder, and the problem that the membrane plug valve occupies a large space in the radial direction of the valve rod is solved; the valve rod is limited by sealing through the third sealing ring, the fourth sealing ring and the second sealing ring, the valve rod is positioned through the sealing retaining ring, and the soft and hard points are combined, so that the problem that the coaxiality requirement of the valve rod and the cylinder body is high is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of the invention and that other embodiments may be derived by those skilled in the art without inventive step from the drawings provided.
FIG. 1: the utility model is a schematic sectional structure diagram when being closed;
FIG. 2: the utility model discloses the sectional structure schematic diagram when opening.
Detailed Description
The invention will be further described with reference to the following figures and examples:
reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "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 of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The first embodiment is as follows:
as shown in fig. 1 and 2, the present embodiment provides a novel membrane plug valve, including: the lower valve body 1, the diaphragm 3 and the cylinder, the diaphragm 3 includes a central portion 31 and an edge portion 32, the central portion 31 and the edge portion 32 are integrally formed, the edge portion 32 is fixed relative to the lower valve body 1, the cylinder drives the central portion 31 to move up and down, the cylinder includes a cylinder body, a valve rod 6 or a piston 7, the piston 7 is located inside the cylinder body and divides the inside of the cylinder body into a first cavity and a second cavity, the first cavity and the second cavity are located above and below the piston 7 respectively, a first vent hole 51 is formed in the cylinder body, the valve rod 6 is fixedly connected with the piston 7, a channel is formed inside the valve rod 6, and two ends of the channel of the valve rod 6 are communicated with the first vent hole 51 and the second cavity respectively.
On the basis of the technical scheme, the novel air cylinder further comprises a spring 71 and a fourth sealing ring 72, the air cylinder body of the air cylinder comprises a lower end cover 2, a cylinder body 4 and an upper end cover 5, two ends of the cylinder body 4 are fixedly connected with the lower end cover 2 and the upper end cover 5 respectively, the spring 71 is located in a first cavity, two ends of the spring 71 are in contact with the upper end cover 5 and a piston 7 respectively, the fourth sealing ring 72 is sleeved on the outer side of the piston 7, and the fourth sealing ring 72 is connected with the inner wall of the cylinder body 4 in a sliding mode.
On the basis of the technical scheme, the valve rod sealing device further comprises a third sealing ring 54, a communication hole 53 is formed in the upper end cover 5, the first vent hole 51 is formed in the upper end cover 5, the communication hole 53 is communicated with the first vent hole 51, the third sealing ring 54 is fixed in the communication hole 53, the inner side and the outer side of the third sealing ring 54 are respectively attached to the valve rod 6 and the inner wall of the communication hole 53, and the communication hole 53 is communicated with a channel of the valve rod 6.
On the basis of the technical scheme, the channel of the valve rod 6 comprises an axial blind hole 61 and a radial through hole 62, the axial blind hole 61 is communicated with the communicating hole 53, and two ends of the radial through hole 62 are respectively communicated with the axial blind hole 61 and the second cavity; the upper end cap 5 is formed with a second vent hole 52.
On the basis of the technical scheme, the sealing device further comprises a sealing retaining ring 21 and a second sealing ring 22, the section of the sealing retaining ring 21 is rectangular, the inner side and the outer side of the sealing retaining ring 21 are respectively attached to the valve rod 6 and the lower end cover 2, the sealing retaining ring 21 is fixed to the lower end cover 2, the valve rod 6 is connected with the sealing retaining ring 21 in a sliding mode, the inner side and the outer side of the second sealing ring 22 are respectively attached to the valve rod 6 and the lower end cover 2, and the second sealing ring 22 is fixed to the lower end cover 2;
the seal retaining ring 21 is made of polytetrafluoroethylene.
On the basis of the technical scheme, the valve rod further comprises a screw 63, an expanded part of the screw 63 is inserted into the central part 31 and fixedly connected with the central part 31, and the screw 63 is in threaded connection with the valve rod 6; the upper end of the central part 31 is attached to the lower end of the valve rod 6;
the lower end cover 2 is fixedly connected with the lower valve body 1, and the edge part 32 is clamped and fixed by the lower end cover 2 and the lower valve body 1.
On the basis of the technical scheme, a third cavity 30 is formed between the diaphragm 3 and the lower end cover 2, a third vent hole 23 is formed in the lower end cover 2, and the third cavity 30 is communicated with the third vent hole 23.
On the basis of the technical scheme, the lower valve body 1 is provided with an inlet 11, an outlet 12 and a valve seat 13, the inlet 11 is communicated with the outlet 12 through the valve seat 13, the valve seat 13 is provided with a first sealing conical surface 14, and the central part 31 is provided with a second sealing conical surface 33 matched with the first sealing conical surface 14; the diaphragm 3 and the valve seat 13 are both rotary bodies, and the diaphragm 3 is made of elastic materials.
On the basis of the technical scheme, the membrane 3 is made of polytetrafluoroethylene.
The working principle is as follows:
when the valve is opened, high-pressure gas enters the communication hole 53 from the first vent hole 51, and the high-pressure gas enters the second cavity after sequentially passing through the axial blind hole 61 and the radial through hole 62. The high pressure gas pushes the piston 7 upward, which in turn moves the valve rod 6 and the central portion 31 upward. The second sealing cone surface 33 is out of contact with the first sealing cone surface 14 and liquid enters from the inlet 11 through the valve seat 13 and then flows out from the outlet 12, the direction of the liquid flow being shown by the arrows in fig. 2.
When the valve is closed, the air supply is disconnected from the first vent hole 51, and the first vent hole 51 is communicated with the outside atmosphere. The spring 71 rebounds to push the piston 7 downward and the gas in the second chamber is vented outward from the first vent hole 51 along the path. The second sealing tapered surface 33 abuts the first sealing tapered surface 14 to disconnect the inlet 11 and the outlet 12.
Wherein the volume of the third chamber 30 changes during the movement of the membrane 3 and the third venting hole 23 can function as both air inlet and air outlet. At the same time, the first through hole 22 can also function to drain the liquid below the membrane 3 after the membrane 3 is broken. The liquid flows out of the first through hole 22 and can remind the user to replace the membrane 3.
Wherein, the hard valve seat 13 contacts with the diaphragm 3 made of elastic material, the sealing point is combined with soft and hard, and the sealing performance is better. The second sealing conical surface 33 and the first sealing conical surface 14 are conical surfaces, are sealed by inclined surfaces, have guidance performance, and have better sealing performance. The second sealing conical surface 33 and the first sealing conical surface 14 have small sealing surfaces and small contact surfaces, so that the residual liquid on the sealing surfaces is reduced when the valve is closed, the number of crystals of the residual liquid on the sealing surfaces is reduced, and the service lives of the valve seat 13 and the diaphragm 3 are prolonged.
Wherein, the laminating of central part 31 upper end and valve rod 6 lower extreme, the two hard contact guarantees the straightness that hangs down that central part 31 arrived, is favorable to sealing.
The valve rod 6 and the piston 7 are fixedly connected and move synchronously, soft positioning is carried out by three soft sealing rings (made of rubber or silica gel) of a third sealing ring 54, a fourth sealing ring 72 and a second sealing ring 22, and the soft sealing rings have larger compression amount at local parts so as to adapt to the coaxiality error of the piston 7 and the cylinder body 4 and the coaxiality error of the valve rod 6 and the lower end cover 2 and the upper end cover 5. The lateral surface of valve rod 6 and the medial surface of sealed retainer ring 21 are the face of cylinder and laminate mutually, compare the sealed retainer ring 21 that the sealing washer is harder with valve rod 6 location to realize that multiple spot location, soft or hard point combine, the axiality is better, and then sealed better, the life-span is longer.
The present invention has been described above by way of example, but the present invention is not limited to the above-mentioned embodiments, and any modifications or variations based on the present invention are all within the scope of the present invention as claimed.
Claims (9)
1. A novel membrane plug valve, comprising: the lower valve body (1), the diaphragm (3) and the cylinder, the diaphragm (3) includes central part (31) and edge part (32), central part (31) and edge part (32) integrated into one piece, edge part (32) are fixed relatively lower valve body (1), cylinder drive central part (31) reciprocate, the cylinder includes cylinder body, valve rod (6) or piston (7), piston (7) are located inside the cylinder body and separate into first cavity and second cavity with the cylinder body is inside, first cavity and second cavity are located the top and the below of piston (7) respectively, the cylinder body is formed with first air vent (51), valve rod (6) and piston (7) fixed connection, the inside passageway that is formed with of valve rod (6), the passageway both ends of valve rod (6) communicate with first air vent (51) and second cavity respectively.
2. The novel membrane plug valve according to claim 1, characterized in that: still include spring (71) and fourth sealing washer (72), the cylinder body of cylinder includes lower extreme cover (2), barrel (4) and upper end cover (5), barrel (4) both ends respectively with lower extreme cover (2) and upper end cover (5) fixed connection, spring (71) are located first cavity, spring (71) both ends respectively with upper end cover (5) and piston (7) contact, fourth sealing washer (72) suit is in the piston (7) outside, fourth sealing washer (72) and barrel (4) inner wall sliding connection.
3. The novel membrane plug valve according to claim 2, characterized in that: the valve rod sealing structure is characterized by further comprising a third sealing ring (54), a communicating hole (53) is formed in the upper end cover (5), the first vent hole (51) is formed in the upper end cover (5), the communicating hole (53) is communicated with the first vent hole (51), the third sealing ring (54) is fixed in the communicating hole (53), the inner side and the outer side of the third sealing ring (54) are attached to the inner walls of the valve rod (6) and the communicating hole (53) respectively, and the communicating hole (53) is communicated with a channel of the valve rod (6).
4. A novel membrane plug valve according to claim 3, characterized in that: the passage of the valve rod (6) comprises an axial blind hole (61) and a radial through hole (62), the axial blind hole (61) is communicated with the communicating hole (53), and two ends of the radial through hole (62) are respectively communicated with the axial blind hole (61) and the second cavity; the upper end cover (5) is provided with a second vent hole (52).
5. The novel membrane plug valve according to claim 2, characterized in that: the sealing structure is characterized by further comprising a sealing retaining ring (21) and a second sealing ring (22), wherein the cross section of the sealing retaining ring (21) is rectangular, the inner side and the outer side of the sealing retaining ring (21) are respectively attached to the valve rod (6) and the lower end cover (2), the sealing retaining ring (21) is fixed to the lower end cover (2), the valve rod (6) is in sliding connection with the sealing retaining ring (21), the inner side and the outer side of the second sealing ring (22) are respectively attached to the valve rod (6) and the lower end cover (2), and the second sealing ring (22) is fixed to the lower end cover (2);
the sealing retaining ring (21) is made of polytetrafluoroethylene.
6. The novel membrane plug valve according to claim 2, characterized in that: the valve rod further comprises a screw (63), an expansion part of the screw (63) is inserted into the central part (31) and fixedly connected with the central part (31), and the screw (63) is in threaded connection with the valve rod (6); the upper end of the central part (31) is attached to the lower end of the valve rod (6);
the lower end cover (2) is fixedly connected with the lower valve body (1), and the edge part (32) is clamped and fixed by the lower end cover (2) and the lower valve body (1).
7. The novel membrane plug valve according to claim 1, characterized in that: a third cavity (30) is formed between the diaphragm (3) and the lower end cover (2), a third vent hole (23) is formed in the lower end cover (2), and the third cavity (30) is communicated with the third vent hole (23).
8. The novel membrane plug valve according to claim 1, characterized in that: the lower valve body (1) is provided with an inlet (11), an outlet (12) and a valve seat (13), the inlet (11) is communicated with the outlet (12) through the valve seat (13), the valve seat (13) is provided with a first sealing conical surface (14), and the central part (31) is provided with a second sealing conical surface (33) matched with the first sealing conical surface (14); the diaphragm (3) and the valve seat (13) are both revolving bodies, and the diaphragm (3) is made of elastic materials.
9. The novel membrane plug valve according to claim 1, characterized in that: the membrane (3) is made of polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222263210.2U CN217951293U (en) | 2022-08-26 | 2022-08-26 | Novel membrane plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222263210.2U CN217951293U (en) | 2022-08-26 | 2022-08-26 | Novel membrane plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217951293U true CN217951293U (en) | 2022-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222263210.2U Active CN217951293U (en) | 2022-08-26 | 2022-08-26 | Novel membrane plug valve |
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| CN (1) | CN217951293U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117386854A (en) * | 2023-12-12 | 2024-01-12 | 海普瑞(常州)洁净系统科技有限公司 | Large-small flow switching valve for semiconductor and use method thereof |
-
2022
- 2022-08-26 CN CN202222263210.2U patent/CN217951293U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117386854A (en) * | 2023-12-12 | 2024-01-12 | 海普瑞(常州)洁净系统科技有限公司 | Large-small flow switching valve for semiconductor and use method thereof |
| CN117386854B (en) * | 2023-12-12 | 2024-02-23 | 海普瑞(常州)洁净系统科技有限公司 | Large-small flow switching valve for semiconductor and use method thereof |
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