CN215410316U

CN215410316U - Diaphragm valve with double-layer diaphragm

Info

Publication number: CN215410316U
Application number: CN202121658367.4U
Authority: CN
Inventors: 蔡成云
Original assignee: Huaya Industrial Plastic Taicang Co ltd
Current assignee: Huaya Industrial Plastic Taicang Co ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-01-04
Anticipated expiration: 2031-07-21

Abstract

The utility model discloses a diaphragm valve with a double-layer diaphragm, which comprises a hand wheel and a valve body, wherein the hand wheel is arranged on the valve body, a blocking block is arranged in the valve body to divide the valve body into a first flow channel and a second flow channel, and a first flange interface and a second flange interface are respectively arranged on the valve body; a diaphragm component is embedded in the valve body and comprises a first diaphragm, a second diaphragm and a bolt, one end of the bolt is embedded in the second diaphragm, and the other end of the bolt penetrates through the first diaphragm and extends to the upper part of the first diaphragm; the hand wheel is internally provided with a supporting rod, the supporting rod is externally sleeved with a return spring, the bottom of the supporting rod is sequentially connected with a piston, a connecting block and a valve clack, and a bolt penetrates through the valve clack and is screwed at the end part of the connecting block. According to the diaphragm valve with the double-layer diaphragm, the double-layer diaphragm is adopted to jointly form the diaphragm component, so that the compressive strength of the diaphragm component is further improved and the service life of the diaphragm valve is prolonged on the premise of ensuring the normal work of the diaphragm valve.

Description

Diaphragm valve with double-layer diaphragm

Technical Field

The utility model relates to the technical field of diaphragm valves, in particular to a diaphragm valve with a double-layer diaphragm.

Background

The diaphragm valve is a stop valve which uses a diaphragm as an opening and closing piece to close a flow passage, cut off fluid and separate an inner cavity of the valve body from an inner cavity of the valve cover. The diaphragm is made of elastic, corrosion-resistant and impermeable materials such as rubber and plastics. The valve body is made of multipurpose plastic, glass fiber reinforced plastic, ceramic or metal lining rubber material. Simple structure, better sealing and corrosion resistance and small fluid resistance.

With the gradual widening of the application range of the diaphragm valve, new requirements are provided for the performance of the diaphragm valve, for example, in some industries, the diaphragm valve is used in a high-temperature liquid conveying pipeline, the temperature resistance of the traditional diaphragm valve cannot meet the requirements, and the traditional diaphragm valve is aged or even damaged quickly in the using process; the diaphragm sheet made of high-temperature resistant material alone is difficult to meet the strength requirement, is easy to break, and affects the sealing performance and the service life of the valve.

Therefore, the above problems need to be solved.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the defects, the utility model aims to provide the diaphragm valve with the double-layer diaphragm, and the diaphragm component has the advantages of good compressive strength, good sealing performance and long service life.

The technical scheme is as follows: in order to achieve the purpose, the utility model provides a diaphragm valve with a double-layer diaphragm, which comprises a hand wheel and a valve body, wherein the hand wheel is arranged on the valve body, one side of the valve body is provided with a first flange interface, the other side of the valve body is provided with a second flange interface, a first flow channel is arranged in the valve body close to the first flange interface, one side of the first flow channel is provided with a barrier block, one side of the barrier block, opposite to the first flow channel, is provided with a second flow channel, a diaphragm component is embedded in the valve body and comprises a first diaphragm, a second diaphragm and a bolt, one end of the bolt is embedded in the second diaphragm, and the other end of the bolt penetrates through the first diaphragm and extends to the upper part of the first diaphragm; the hand wheel is internally provided with a support rod, the support rod is sleeved with a reset spring, the bottom of the support rod is provided with a piston, a connecting block is arranged at the middle position below the piston, a valve clack is arranged below the connecting block, and a bolt penetrates through the valve clack and is screwed at the end part of the connecting block.

Further, in the diaphragm valve with the double-layer diaphragm, the bottom of the second diaphragm is provided with an annular protrusion, the valve body is provided with an annular groove matched with the annular protrusion, and the annular protrusion is in interference fit with the annular groove.

Furthermore, in the diaphragm valve with the double-layer diaphragm, the bottom of the second diaphragm is provided with a convex rib, and a groove matched with the convex rib is arranged above the blocking block.

Further, in the diaphragm valve with the double-layer diaphragm, a hand wheel screw is mounted at the top of the hand wheel.

Further, in the diaphragm valve with the double-layer diaphragm, the inner walls of the first flange interface and the second flange interface are both of a threaded structure.

Further, in the diaphragm valve with the double-layer diaphragm, the first flange interface and the second flange interface are both internally provided with a sealing ring.

Further, in the diaphragm valve with the double-layer diaphragm, the hand wheel is in threaded connection with the valve body.

Further, in the diaphragm valve with the double-layer diaphragm, a contact surface of the valve flap and the first diaphragm is an arc surface.

Further, in the diaphragm valve with the double-layer diaphragm, the second diaphragm is made of CPVC material.

The technical scheme shows that the utility model has the following beneficial effects:

1. according to the diaphragm valve with the double-layer diaphragm, the CPVC material can be used for a long time at a higher temperature and a higher pressure, the tensile strength is high, the chemical corrosion resistance at normal temperature is excellent, and the CPVC material still has good acid resistance, alkali resistance and chemical medicine resistance at the higher temperature;

2. according to the diaphragm valve with the double-layer diaphragm, the annular protruding part, the annular groove, the convex ribs and the grooves are matched, so that slight friction between the diaphragm assembly and the valve body and between the diaphragm assembly and the blocking block in the opening and closing processes of the diaphragm valve can be prevented, the service life of the diaphragm assembly is further prolonged, and meanwhile, the sealing performance of the diaphragm valve is better facilitated;

3. according to the diaphragm valve with the double-layer diaphragm, the piston connected with the support rod is arranged, and in the opening process of the diaphragm component and the blocking block, the piston can play a double sealing role, so that liquid is prevented from entering the valve body, the corrosion to the interior of the valve body is avoided, the diaphragm valve is kept clean, and the sealing performance is improved.

Drawings

FIG. 1 is a schematic structural diagram of a diaphragm valve having a double-layer diaphragm according to the present invention;

FIG. 2 is a detailed view of portion A of FIG. 1 of a diaphragm valve having a dual layer diaphragm in accordance with the present invention;

FIG. 3 is a detailed view of portion B of FIG. 1 of a diaphragm valve having a dual layer diaphragm in accordance with the present invention;

in the figure: 1. a hand wheel; 11. a support bar; 12. a return spring; 13. a hand wheel screw; 2. a valve body; 21. a valve flap; 22. an annular groove; 23. a groove; 3. a first flange interface; 4. a second flange interface; 5. a first flow channel; 6. a barrier block; 7. a second flow channel; 8. a diaphragm assembly; 81. a first diaphragm sheet; 82. a second diaphragm; 83. a bolt; 84. an annular projection; 85. a rib is protruded; 9. a piston; 91. connecting blocks; 10. and (5) sealing rings.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

The diaphragm valve with the double-layer diaphragm as shown in fig. 1-3 comprises a hand wheel 1 and a valve body 2, wherein the hand wheel 1 is arranged on the valve body 2, a first flange connector 3 is arranged on one side of the valve body 2, a second flange connector 4 is arranged on the other side of the valve body 2, a first flow channel 5 is arranged in the valve body 2 close to the first flange connector 3, a blocking block 6 is arranged on one side of the first flow channel 5, a second flow channel 7 is arranged on one side of the blocking block 6 opposite to the first flow channel 5, a diaphragm component 8 is embedded in the valve body 2, the diaphragm component 8 comprises a first diaphragm 81, a second diaphragm 82 and a bolt 83, one end of the bolt 83 is embedded in the second diaphragm 82, and the other end of the bolt is inserted in the first diaphragm 81 and extends above the first diaphragm 81; be equipped with bracing piece 11 in the hand wheel 1, reset spring 12 is established to 11 overcoat of bracing piece, 11 bottoms of bracing piece are equipped with piston 9, piston 9 below intermediate position is equipped with connecting block 91, the connecting block 91 below is equipped with valve clack 21, bolt 83 wears to locate valve clack 21 and connects soon at the tip of connecting block 91.

Wherein, the bottom of the second diaphragm 82 is provided with an annular protrusion 84, the valve body 2 is provided with an annular groove 22 matched with the annular protrusion 84, and the annular protrusion 84 is in interference fit with the annular groove 22.

Moreover, a rib 85 is arranged at the bottom of the second diaphragm 82, and a groove 23 matched with the rib 85 is arranged above the barrier block 6.

A hand wheel screw 13 is mounted on the top of the hand wheel 1.

And the inner walls of the first flange connector 3 and the second flange connector 4 are both in a threaded structure.

Further, the first flange connector 3 and the second flange connector 4 are both internally provided with a sealing ring 10.

Furthermore, the hand wheel 1 is screwed to the valve body 2.

Moreover, the contact surface of the valve flap 21 and the first diaphragm 81 is an arc surface.

Further, the second diaphragm is made of a CPVC material.

When the diaphragm valve with the double-layer diaphragm is used, a hand wheel 1 and a valve body 2 are combined together in a threaded mode, then a liquid inlet pipe and a liquid outlet pipe are fixedly connected with a first flange connector 3 and a second flange connector 4 respectively, when the hand wheel 1 rotates anticlockwise, the hand wheel 1 moves upwards, a support rod 11 drives a piston 9 to move upwards, the piston 9 drives a valve clack 21 and a bolt 83 to move upwards by utilizing a connecting block 91, so that a first diaphragm piece 81 and a second diaphragm piece 82 are driven to move upwards, a diaphragm piece assembly 8 is separated from a blocking block 6, and liquid enters the inside of a second flow channel 6 from a first flow channel 5, so that circulating circulation of the liquid is realized; on the contrary, when the hand wheel 1 is rotated clockwise, the hand wheel 1 moves downwards, at this time, the support rod 11 drives the piston 9 to move downwards, the piston 9 drives the valve clack 21 and the bolt 83 to move downwards by using the connecting block 91, so that the first diaphragm piece 81 and the second diaphragm piece 82 are driven to move downwards, and the diaphragm piece assembly 8 and the separation block 6 are closed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims

1. The diaphragm valve with the double-layer diaphragm is characterized by comprising a hand wheel (1) and a valve body (2), wherein the hand wheel (1) is arranged on the valve body (2), a first flange interface (3) is arranged on one side of the valve body (2), a second flange interface (4) is arranged on the other side of the valve body (2), a first flow channel (5) is arranged at the position, close to the first flange interface (3), inside the valve body (2), a blocking block (6) is arranged on one side of the first flow channel (5), a second flow channel (7) is arranged on one side, opposite to the first flow channel (5), of the blocking block (6), a diaphragm assembly (8) is embedded inside the valve body (2), the diaphragm assembly (8) comprises a first diaphragm (81), a second diaphragm (82) and a bolt (83), one end of the bolt (83) is embedded in the second diaphragm (82), the other end of the diaphragm penetrates through the first diaphragm (81) and extends to the upper part of the first diaphragm (81); be equipped with bracing piece (11) in hand wheel (1), reset spring (12) are established to bracing piece (11) overcoat, bracing piece (11) bottom is equipped with piston (9), piston (9) below intermediate position is equipped with connecting block (91), connecting block (91) below is equipped with valve clack (21), valve clack (21) are worn to locate and connect the tip at connecting block (91) soon in bolt (83).

2. The diaphragm valve with the double-layer diaphragm of claim 1, wherein the second diaphragm (82) is provided at the bottom with an annular protrusion (84), the valve body (2) is provided with an annular groove (22) engaged with the annular protrusion (84), and the annular protrusion (84) is in interference fit with the annular groove (22).

3. The diaphragm valve with double-layer diaphragm of claim 2, wherein the second diaphragm sheet (82) is provided with a rib (85) at the bottom, and a groove (23) matched with the rib (85) is arranged above the barrier block (6).

4. A diaphragm valve with a double membrane according to claim 3, where a hand wheel screw (13) is mounted on top of the hand wheel (1).

5. The diaphragm valve with the double-layer diaphragm of claim 4, wherein the inner walls of the first flange interface (3) and the second flange interface (4) are both of a threaded structure.

6. The diaphragm valve with the double-layer diaphragm of claim 5, wherein the first flange interface (3) and the second flange interface (4) are internally provided with sealing rings (10).

7. The diaphragm valve with two layers of diaphragm of claim 6 where the hand wheel (1) is threaded to the valve body (2).

8. A diaphragm valve with a double membrane according to claim 7, where the contact surface of the valve flap (21) with the first diaphragm sheet (81) is a cambered surface.