CN217653278U - Diaphragm mounting structure of diaphragm valve - Google Patents

Abstract

The utility model discloses a diaphragm installation structure of a diaphragm valve, which comprises a carrier, wherein a blocking space is arranged in the carrier, the input pipeline and the output pipeline communicate with the blocking space, the blocking space is provided with a diaphragm, and the diaphragm The sheet includes a support part and an elastic part, the elastic part is fixed at the lower end of the support part, the outer contour of the elastic part is adapted to the bottom of the blocking space, the support part is used to abut the carrier, and the elastic part deforms to block the connection between the blocking space and the input pipeline. Connected. The upper end of the diaphragm is provided with a screw, the lower end of the screw is fixed in the elastic part, the carrier is provided with a guide hole, the guide hole is provided with a piston rod, the lower end of the piston rod is provided with a socket corresponding to the screw, and the upper end of the screw extends In order to improve the diaphragm installation method of the existing diaphragm valve, it is easy to cause the diaphragm to be continuously flushed by the working medium when it is closed, and the risk of diaphragm wear is relatively large.

Description

Diaphragm installation structure of a diaphragm valve

technical field

The utility model relates to a diaphragm valve, in particular to a diaphragm installation structure of the diaphragm valve.

Background technique

At present, the diaphragm valve has been widely used, and the diaphragm of the diaphragm valve is a moving part. The diaphragm valve generally adopts a diaphragm in the middle of the water inlet pipe and the water outlet pipe, and the lower end of the diaphragm is used to contact the middle position of the diaphragm valve, so that the side of the diaphragm is deformed. , and then block the water inlet and outlet pipes at the same time; control and cut off the flow of the working medium by moving the diaphragm of the diaphragm valve up and down, and the diaphragm is usually a wearing part of the diaphragm valve. The current diaphragm valve generally uses a diaphragm in the middle of the water inlet pipe and the water outlet pipe, and the lower end of the diaphragm is used to contact the middle position of the diaphragm valve, so that the side of the diaphragm is deformed, and then the water inlet pipe and the water outlet pipe are blocked at the same time; in the actual application process , By disassembling the diaphragm valve with unsatisfactory blocking effect or damage, it is found that if the diaphragm is lost, it is generally in the deformation surface of the diaphragm; through further analysis of the mold flow state of the pipeline, it is considered that the diaphragm is in continuous contact work Parts of the medium, the diaphragm of which is easily washed by the working medium during the isolation process, which increases the risk of wear of the diaphragm during the blocking process. Although the thickness of the diaphragm can be increased to improve the durability of use, the diaphragm of the diaphragm valve is limited. Due to the deformation requirements, it is not ideal to improve the thickness of the diaphragm valve.

Although there are many composite diaphragms, the more wear-resistant the diaphragm material, the higher the cost of the material. In order to better adapt to the working conditions, in addition to improving the durability of the diaphragm material of the diaphragm valve, for the diaphragm The possible improvement of the wear condition in the diaphragm valve is not obvious, so how to improve the existing diaphragm valve structure on the basis of materials to reduce the wear risk of the diaphragm during the plugging process is worth studying.

Utility model content

The purpose of the present invention is to provide a diaphragm installation structure of a diaphragm valve, in order to improve the diaphragm installation method of the existing diaphragm valve, so that the diaphragm will continue to be washed by the working medium when it is closed, and the diaphragm is worn riskier issues.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A diaphragm installation structure of a diaphragm valve, comprising a carrier, two ends of the carrier are respectively provided with an input pipe and an output pipe, the carrier is provided with a blocking space, the input pipe and the output pipe are connected to the blocking space, and the blocking space is There is a diaphragm, the diaphragm includes a support part and an elastic part, the elastic part is fixed at the lower end of the support part, the outer contour of the elastic part is adapted to the bottom of the blocking space, the support part is used to abut the carrier, and is deformed by the elastic part The communication between the blocking space and the input pipe is blocked. The upper end of the diaphragm is provided with a screw, the lower end of the screw is fixed in the elastic part, the carrier is provided with a guide hole, the guide hole is provided with a piston rod, the lower end of the piston rod is provided with a socket corresponding to the screw, and the upper end of the screw extends Into the socket, the piston rod is used to move back and forth in the guide hole and drive the elastic part to deform, and the elastic part is used to block the communication hole between the blocking space and the input pipe.

The carrier includes an upper valve body and a lower valve body, the upper valve body is installed on the upper end of the lower valve body, the upper end of the lower valve body is provided with a first cavity, the upper end of the first cavity is open, and the input pipeline and the output pipeline are respectively connected to the first cavity. A cavity; the lower end of the upper valve body is provided with a second cavity, the first cavity and the second cavity are mutually closed to form a blocking space, and the support portion is located at the junction of the first cavity and the second cavity, The lower end of the elastic part matches the contour of the bottom of the first cavity.

Preferably, the first cavity is provided with a limit slot, the limit slot is located at the junction of the first cavity and the second cavity, the limit slot is adapted to the outer contour of the support portion, and the support portion is fixed In the limiting groove, the input pipe is blocked by the elastic part through deformation.

Preferably, the bottom of the elastic part is flat, and the bottom of the elastic part matches the diameter of the input pipe; the side wall of the elastic part is arc-shaped, and the side wall of the elastic part is used to deform and cover the bottom of the first cavity.

Preferably, the lower end of the upper valve body is provided with a second flange, the upper end of the lower valve body is provided with a first flange, and the first flange and the second flange are matched with each other.

Preferably, the side wall of the upper valve body is provided with a pressure regulating hole, both ends of the pressure regulating hole are respectively connected to the outside world and the second cavity, and the pressure regulating hole is used to maintain the air pressure in the space above the elastic part.

Compared with the prior art, the beneficial effect of the present utility model is at least one of the following:

The diaphragm of the utility model is fixed in shape by the support part, and the elastic part is deformed to directly block the input pipeline. On the one hand, it can improve the blocking effect of the diaphragm valve, and on the other hand, it can improve the risk of the working medium scouring the place where the volume of the diaphragm is relatively thin; the utility model uses the piston rod as the pushing part at the same time, and uses the way of the socket and the screw to cooperate, which is easy to clean the diaphragm. Replacement, thereby reducing the maintenance cost of the diaphragm valve during long-term use.

Description of drawings

Figure 1 is a schematic diagram of the structure distribution of the utility model.

Figure 2 is a schematic diagram of the structure of the diaphragm sheet of the present invention.

FIG. 3 is a schematic diagram of the blocking of the diaphragm sheet of the present invention.

FIG. 4 is a schematic diagram of the opening of the diaphragm sheet of the present invention.

FIG. 5 is a schematic diagram of the structure of the upper valve body of the present invention.

FIG. 6 is a schematic structural diagram of the lower valve body of the present invention.

FIG. 7 is a schematic diagram of the disassembly of the structure of the utility model.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

Referring to FIG. 1 to FIG. 7 , an embodiment of the present invention is a diaphragm installation structure for a diaphragm valve, including a carrier 1, wherein the carrier 1 is made of an existing metal material, and both ends of the carrier 1 are respectively provided with In the input pipeline 2 and the output pipeline 3, the carrier 1 is a double-pass structure, and the working medium is input into the carrier 1 through the input pipeline 2, and is transported to the output pipeline 3 through the carrier 1, and the above-mentioned carrier 1 is provided with a blocking space 4, The above-mentioned input pipe 2 and output pipe 3 communicate with the blocking space 4 . The above-mentioned blocking space 4 is provided with a diaphragm 5, the diaphragm 5 is placed in the blocking space 4 of the carrier 1, and the working medium of the carrier is separated from other actuators of the carrier 1 in the blocking space 4 by the diaphragm 5 .

Referring to Figure 2, considering that a single diaphragm 5 is not suitable for all diaphragm valves, there is no universal diaphragm 5 suitable for all applications. Therefore, for different media and industries, the diaphragm 5 will be different. material. The diaphragm 5 includes a support portion 501 and an elastic portion 502. The elastic portion 502 is fixed at the lower end of the support portion 501. The outer contour of the elastic portion 502 is adapted to the bottom of the blocking space 4. The support portion 501 is used to interfere with the carrier 1. The elastic portion 502 deforms to block the communication between the blocking space 4 and the input pipe 2 .

The elastic part 502 is made of the existing rubber material, and the material of the elastic part 502 is determined according to the working medium transmitted by the input pipe 2 and the output pipe 3 . For example, the elastic part 502 is the existing EPDM rubber, and the elastic part 502 can have excellent elasticity, oxidation resistance, ozone resistance and corrosion resistance, and can be suitable for hot water medium, cold water medium, alkaline medium and non-concentrated medium Acidic medium, steam medium, etc. For example, the elastic portion 502 is an existing fluororubber, and the elastic portion 502 can have high elasticity unique to rubber and excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance, which is suitable for Transfer corrosive working media.

The support portion 501 serves as a component for restricting the shape of the elastic portion 502 . The support portion 501 adopts a metal structure. The material of the support portion 501 is the same as that of the carrier 1 .

Referring to FIG. 3 , if it is necessary to block the flow during operation, a downward pressure is applied to the elastic portion 502 to deform the elastic portion 502 and block the connection between the blocking space 4 and the input pipe 2 , so as to realize the connection of the input pipe 2 . It is closed to prevent the working medium of the input pipe 2 from entering the carrier 1 and then flowing into the output pipe 3.

Referring to FIG. 4 , if the flow needs to be maintained during operation, the elastic portion 502 is deformed and separated from the connection between the blocking space 4 and the input pipe 2 by applying a pulling force to the elastic portion 502 , thereby completing the conduction.

Considering that the diaphragm 5 is a vulnerable part, it must be inspected and replaced regularly, otherwise it may lead to functional failure or even a dangerous situation. In order to better replace the diaphragm 5, the upper end of the diaphragm 5 is provided with a screw 503. The lower end of the screw rod 503 is fixed in the elastic part 502 , wherein the lower end of the screw rod 503 is wrapped by the elastic part 502 , and the pulling force or the pushing force is transmitted to the elastic part 502 through the screw rod 503 .

The carrier 1 is provided with a guide hole 6, the guide hole 6 is provided with a piston rod 7, the lower end of the piston rod 7 is provided with a socket 701 corresponding to the screw 503, the upper end of the screw 503 extends into the socket 701, and the piston rod 7 is used for It moves back and forth in the guide hole 6 and drives the elastic portion 502 to deform. The elastic portion 502 is used to block the communication hole between the blocking space 4 and the input pipe 2 . Among them, the piston rod 7 is driven by an external transmission mechanism, and the piston rod 7 has various transmission modes, which can be driven by an existing screw structure, or driven by a motor, and can also be driven by an existing cylinder. By moving the piston rod 7 in the guide hole 6 , the screw 503 at the lower end of the piston rod 7 can apply a pulling force or a pushing force to the elastic part 502 , so as to control the elastic part 502 to move by deformation. The blocking and flow state control of the blocking space 4 are realized.

Referring to FIGS. 1 , 5 , 6 and 7 , based on the above-mentioned embodiment, another embodiment of the present invention is that the above-mentioned carrier 1 includes an upper valve body 8 and a lower valve body 9 , and the above-mentioned upper valve body 8 is installed On the upper end of the lower valve body 9, the lower end surface of the upper valve body 8 corresponds to the upper end surface of the lower valve body 9, and the connecting part of the upper valve body 8 and the lower valve body 9 generally adopts the concave-convex matching method of the end faces, so that the upper valve body 8 and the lower valve body 9 The body 9 can be fitted at the corresponding position, and can be locked by bolts after fitting.

The upper end of the lower valve body 9 is provided with a first cavity 901, the upper end of the first cavity 901 is open, the input pipeline 2 and the output pipeline 3 are respectively connected to the first cavity 901; the lower end of the upper valve body 8 is provided with a second cavity 901. The cavity 801, the first cavity 901 and the second cavity 801 are closed to each other to form the blocking space 4, which is conducive to the separation of the lower valve body 9 and the upper valve body 8 during the maintenance process, so as to prevent the blocking space 4 Diaphragm 5 in the replacement and maintenance.

The support portion 501 is located at the junction of the first cavity 901 and the second cavity 801 , the lower end of the elastic portion 502 is in line with the bottom contour of the first cavity 901 , and the support portion 501 of the diaphragm 5 is in the first cavity 901 A partition is formed with the second cavity 801 to prevent the first cavity 901 and the second cavity 801 from communicating with each other.

The support part 501 is annular, the support part 501 is installed between the upper valve body 8 and the lower valve body 9, and the support part 501 is used as the sealing profile of the diaphragm 5. In order to make the diaphragm 5 achieve the sealing effect, further, The first cavity 901 is provided with a limit slot 902, the limit slot 902 is located at the junction of the first cavity 901 and the second cavity 801, the limit slot 902 is adapted to the outer contour of the support portion 501, The above-mentioned support portion 501 is fixed in the limiting groove 902, and the input pipe 2 is blocked by the elastic portion 502 through deformation.

Further, as shown in FIGS. 2 , 3 and 4 , the elastic portion 502 includes a flat bottom, and the bottom of the elastic portion 502 matches the diameter of the input pipe 2 , the side wall of the elastic portion 502 is arc-shaped, and the elastic portion 502 has an arc shape. The side wall of 502 is used to deform and cover the bottom of the first cavity 901 , and the elastic portion 502 adopts a bottom plane structure, in order to better insert into the communication between the input pipe 2 and the blocking space 4 . The side wall of the elastic portion 502 is arc-shaped, which can better deform.

Further, referring to FIG. 5 and FIG. 6 , for better connection between the upper valve body 8 and the lower valve body 9 , the lower end of the upper valve body 8 is provided with a second flange 803 , and the upper end of the lower valve body 9 is provided with a first flange 803 . Flange 903, the first flange 903 and the second flange 803 are matched with each other. The second flange 803 and the first flange 903 are locked by means of bolts, so that the upper valve body 8 and the lower valve body 9 have good stability.

Further, considering that the diaphragm 5 may be deformed during the changing process, so that the pressure difference between the first cavity 901 and the second cavity 801 is affected, the pressure regulating hole 802 is provided on the side wall of the upper valve body 8. The two ends of the pressure regulating hole 802 are respectively connected to the outside world and the second cavity 801 , and the pressure regulating hole 802 is used to maintain the air pressure of the space above the elastic portion 502 .

Specifically, due to the existence of the input pipe 2 and the output pipe 3 in the first cavity 901, the first cavity 901 can be in a relatively stable air pressure state when the diaphragm 5 is moving, so as to prevent the first cavity 901 from being easily affected by the diaphragm Sheet 5 deformation pressure effect. Although there is a guide hole at the upper end of the second cavity 801 , the second cavity 801 is relatively sealed due to the existence of the piston rod 7 . When the diaphragm 5 moves upward, the gas in the second cavity 801 may generate gas to the diaphragm 5 . Therefore, the communication between the second cavity 801 and the outside atmosphere is maintained through the pressure regulating hole 802 , so that the second cavity 801 is also in a normal pressure state during the movement of the diaphragm 5 . Therefore, the stable operation of the diaphragm 5 is ensured as a whole, and unnecessary resistance to the diaphragm 5 caused by changes in air pressure is avoided.

References in this specification to "one embodiment", "another embodiment", "embodiment", "preferred embodiment", etc., mean that specific features, structures or characteristics described in conjunction with the embodiment are included in the In at least one embodiment generally described herein. The appearances of the same expression in various places in the specification are not necessarily all referring to the same embodiment. Further, when a specific feature, structure or characteristic is described in conjunction with any one embodiment, it is claimed that implementing such feature, structure or characteristic in conjunction with other embodiments is also within the scope of the present invention.

Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that many other modifications and implementations can be devised by those skilled in the art that will fall within the scope of this application within the scope and spirit of the principles disclosed. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the present disclosure, drawings and claims. In addition to variations and modifications to the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (6)

1. A diaphragm installation structure for a diaphragm valve, comprising a carrier (1), an input pipe (2) and an output pipe (3) are respectively provided at both ends of the carrier (1), and the carrier (1) is provided with an input pipe (2) and an output pipe (3). The blocking space (4), the input pipe (2) and the output pipe (3) communicate with the blocking space (4), characterized in that: the blocking space (4) is provided with a diaphragm (5), so The diaphragm (5) includes a support portion (501) and an elastic portion (502), the elastic portion (502) is fixed at the lower end of the support portion (501), and the outer contour of the elastic portion (502) is connected to the blocking space (4). ) bottom fitting, the support part (501) is used to abut the carrier (1), and the connection between the blocking space (4) and the input pipe (2) is blocked by the deformation of the elastic part (502); The upper end of the diaphragm sheet (5) is provided with a screw (503), the lower end of the screw (503) is fixed in the elastic part (502), the carrier (1) is provided with a guide hole (6), the guide hole (6) is provided with a piston rod (7), the lower end of the piston rod (7) is provided with a socket (701) corresponding to the screw (503), and the upper end of the screw (503) extends into the socket (701), the The piston rod (7) is used to move back and forth in the guide hole (6) and drive the elastic part (502) to deform, and the elastic part (502) is used to block the communication hole between the blocking space (4) and the input pipe (2) . 2 . The diaphragm installation structure of a diaphragm valve according to claim 1 , wherein the carrier ( 1 ) comprises an upper valve body ( 8 ) and a lower valve body ( 9 ), and the upper valve body ( 8 ) Installed on the upper end of the lower valve body (9), the upper end of the lower valve body (9) is provided with a first cavity (901), the upper end of the first cavity (901) is open, the input pipeline (2) and the output pipeline (3) The first cavity (901) is respectively connected; the lower end of the upper valve body (8) is provided with a second cavity (801), and the first cavity (901) and the second cavity (801) are mutually connected closed to form a blocking space (4), the support part (501) is located at the junction of the first cavity (901) and the second cavity (801), and the lower end of the elastic part (502) is connected to the first cavity ( 901) to match the bottom contour. 3. The diaphragm installation structure of the diaphragm valve according to claim 2, characterized in that: the first cavity (901) is provided with a limit groove (902), and the limit groove (902) is placed in the first cavity (901). At the junction of a cavity (901) and a second cavity (801), the limiting groove (902) is adapted to the outer contour of the support portion (501), and the supporting portion (501) is fixed in the limiting groove In (902), the input pipe (2) is blocked by the elastic part (502) through deformation. 4. The diaphragm installation structure of the diaphragm valve according to claim 2, wherein the elastic portion (502) includes a flat bottom, and the bottom of the elastic portion (502) matches the diameter of the input pipe (2), The sidewall of the elastic portion (502) is arc-shaped, and the sidewall of the elastic portion (502) is used to deform and cover the bottom of the first cavity (901). 5. The diaphragm installation structure of the diaphragm valve according to claim 2, characterized in that: the lower end of the upper valve body (8) is provided with a second flange (803), and the upper end of the lower valve body (9) is provided with a second flange (803). There is a first flange (903) which mates with the second flange (803). 6 . The diaphragm installation structure of the diaphragm valve according to claim 2 , wherein: the side wall of the upper valve body ( 8 ) is provided with pressure regulating holes ( 802 ), and both ends of the pressure regulating hole ( 802 ) are provided with pressure regulating holes ( 802 ). The external environment and the second cavity (801) are respectively communicated, and the pressure regulating hole (802) is used to maintain the air pressure in the space above the elastic portion (502).

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