CN208734924U - A kind of vacuum diaphragm valve - Google Patents

Abstract

The utility model provides a kind of vacuum diaphragm valve, belongs to diaphragm valve technical equipment field, including shell and piston, and the shell is set as cylindrical body, vertical to place, and outer layer uses stainless steel material；The interior of shell is equipped with type chamber；Limited block is arranged in type chamber upper end, and limited block and shell weld；The lower spring end connects piston, and piston and inner surface of outer cover are in close contact；Distinguish the connecting rod of screw connection in second briquetting left and right ends；There are two the connecting rod is set, about piston centre axial symmetry；The diaphragm left and right ends are connected separately with annular ring, and annular ring is set as L shape；The wedge lower end is provided with valve body, and valve body is connect with wedge screw；The advantages that design of present apparatus structure is simple, small in size, failure is few, and closure is stronger, long service life.

Description

A kind of vacuum diaphragm valve

Technical field

The utility model relates to a kind of diaphragm valve technical equipment, specifically a kind of vacuum diaphragm valves.

Background technique

Conventional vacuum diaphragm valve is formed by by valve body, valve seat, guides stem, diaphragm of rubber etc.；Its shortcoming is shown as Valve deck is excessive, causes rubber diaphragm deformation excessive, influences rubber diaphragm service life, and guides stem will be kept in use Lubricant effect, will affect its lubricant effect after access times are excessive, and lubrication failure just will appear diaphragm of rubber in deformation process In be obstructed, cause vacuum diaphragm valve to be unable to normal switching-off, influence sealing effect.

In the prior art, traditional vacuum diaphragm valve can only be driven by positive pressure driving or electric drive using vacuum itself Dynamic vacuum pipe diaphragm valve, vacuum pipe diaphragm valve there are components it is more, structure is complicated, leakproofness is poor the problems such as.

Utility model content

In view of the above shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a kind of vacuum diaphragms Valve.

In order to solve the above technical problems, the utility model provides following technical solution:

A kind of vacuum diaphragm valve, including shell and piston, the shell are set as cylindrical body, vertical to place, and outer layer is not using Become rusty Steel material；The interior of shell is equipped with type chamber；Limited block is arranged in type chamber upper end, and limited block and shell weld；The bullet Spring lower end connects piston, and piston and inner surface of outer cover are in close contact；Distinguish the company of screw connection in second briquetting left and right ends Extension bar；There are two the connecting rod is set, about piston centre axial symmetry；The diaphragm left and right ends are connected separately with annular ring, Annular ring is set as L shape；The wedge lower end is provided with valve body, and valve body is connect with wedge screw；Described valve inner or so two End is respectively equipped with inlet and outlet；The piston includes annular groove and guide groove；There are two the annular groove is set, about piston It is substantially symmetrical about its central axis；The attachment device includes stock screw and nut；Stock screw lower end is fixedly connected on the first briquetting In inner surface, upper end is equipped with nut；Outer surface of outer cover is arranged in the nut, is mutually threadedly coupled with stock screw；First pressure Gasket is additionally provided in the middle part of block volume and shell, gasket is in close contact with the first briquetting and shell respectively.

As the further improvement project of the utility model: spring being arranged below the limited block, spring is placed on type chamber In.

As the further improvement project of the utility model: the piston is equipped with the second briquetting, table on the second briquetting Face is connect with piston blot.

As the further improvement project of the utility model: diaphragm is arranged in the connecting rod lower end, and diaphragm and connecting rod limit Position connection.

As the further improvement project of the utility model: annular ring upper and lower ends are respectively equipped with the first briquetting and pressure Seat, the first briquetting and wedge are placed and are fixedly connected up and down.

As the further improvement project of the utility model: the import setting is among outlet left end, inlet and outlet It is provided with diaphragm.

As the utility model further improvement project: being equipped with guide groove, guide groove setting in the middle part of the annular groove In the center overlapping of axles of upper piston area point and central axis and piston.

Compared with prior art, the utility model has the beneficial effects that

The utility model is equipped with the first briquetting, annular ring and diaphragm, can be isolated to diaphragm in valve body, conveniently break off The advantages that flowing of liquid, the design of present apparatus structure is simple, small in size, failure is few, and closure is stronger, long service life.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of vacuum diaphragm valve；

Fig. 2 is a kind of structural schematic diagram of piston in vacuum diaphragm valve；

Fig. 3 is a kind of structural schematic diagram of attachment device in vacuum diaphragm valve；

In figure: 1- limited block, 2- type chamber, 3- shell, 4- spring, the first briquetting of 5-, 6- wedge, 7- import, 8- diaphragm, 9- connecting rod, 10- valve body, the outlet 11-, 12- annular ring, the second briquetting of 13-, 14- piston, 15- vacuum stomata, 16- annular groove, 17- guide groove, 18- gasket, 19- stock screw, 20- nut.

Specific embodiment

The technical solution of the patent is explained in further detail With reference to embodiment.

The embodiment of this patent is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, and is only used for explaining this patent, and cannot be understood as a limitation of this patent.

In the description of this patent, it is to be understood that term " center ", "upper", "lower", "front", "rear", " left side ", The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure Orientation or positional relationship, be merely for convenience of description this patent and simplify description, rather than the device of indication or suggestion meaning or Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to this patent.

In the description of this patent, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection ", " setting " shall be understood in a broad sense, for example, it may be being fixedly linked, being arranged, may be a detachable connection, set It sets, or is integrally connected, is arranged.For the ordinary skill in the art, above-mentioned art can be understood as the case may be The concrete meaning of language in this patent.

Referring to Fig. 1, present embodiments providing a kind of vacuum diaphragm valve, including shell 3 and piston 14；The shell 3 is set Vertical to place for cylindrical body, outer layer uses stainless steel material, increases the fastness of device；Type chamber 2 is equipped with inside the shell 3, For providing activity space；Limited block 1 is arranged in 2 upper end of type chamber, and limited block 1 and shell 3 weld, the closing of increment type chamber Property；Spring 4 is set below the limited block 1, and spring 4 is placed in type chamber 2, the effect for reset；The connection of 4 lower end of spring is lived Plug 14, piston 14 and 3 inner surface of shell are in close contact, and increase the closure of device；14 lower end of piston is equipped with the second briquetting 13,13 upper surface of the second briquetting is connect with 14 screw of piston, increases the stability of device；Second briquetting, 13 left and right ends point The connecting rod 9 of other screw connection；It is substantially symmetrical about its central axis about piston 14 there are two the connecting rod 9 is set；9 lower end of connecting rod Diaphragm 8 is set, and diaphragm 8 and the limit of connecting rod 9 connect, convenient for stretching to diaphragm 8；8 left and right ends of diaphragm connect respectively It is connected to annular ring 12, annular ring 12 is set as L shape, plays the role of fixed diaphragm 8；12 upper and lower ends of annular ring are set respectively There are the first briquetting 5 and wedge 6, the first briquetting 5 is placed and is fixedly connected with about 6 wedge, diaphragm 12 can be fixed；Institute It states 6 lower end of wedge and is provided with valve body 10, valve body 10 is connect with 6 screw of wedge, the closure of increment type chamber 2；In the valve body 10 Portion left and right ends are respectively equipped with import 7 and outlet 11；The setting of import 7 is among 11 left ends of outlet, import 7 and outlet 11 It is provided with diaphragm 8, diaphragm 8 can be isolated import 7 and outlet 11.

Referring to Fig. 2, the piston 14 includes annular groove 16 and guide groove 17 in the present embodiment；The annular groove 16 is set There are two, about the substantially symmetrical about its central axis of piston 14, the bottom of spring 4 can be placed；It is equipped in the middle part of the annular groove 16 Guide groove 17, guide groove 17 are arranged in the center overlapping of axles of part and central axis and piston 14 on piston 14, can have to spring 4 There is guiding, prevents spring 4 from positional shift occurs.

Referring to Fig. 3, the attachment device includes stock screw 19 and nut 20 in the present embodiment；The stock screw 19 lower ends are fixedly connected in 5 inner surface of the first briquetting, and upper end is equipped with nut 20；3 outer surface of shell is arranged in the nut 20, with 19 phase of stock screw is threadedly coupled, and increases closure between the first briquetting 5 and shell 3；In first briquetting, 5 volume and shell 3 Portion is additionally provided with gasket 18, and gasket 18 is in close contact with the first briquetting 5 and shell 3 respectively, increases the closure to type chamber 2.

Working principle of the utility model is: diaphragm 8 is in original state, the import 7 inside valve body 10 and outlet 11 are flowed Logical liquid, when the flowing for needing stopping liquid, limited block 1 is downwardly applied to pressure, and spring 4 is compressed, and piston 14 moves downward, together When the second briquetting 13 move downward, diaphragm 8 is moved downward and is contacted with 19 lower inner surface of valve body, can prevent the stream of liquid It is dynamic；When needing liquid, the pressure of limited block 1 is withdrawn from, and under the action of spring 4, diaphragm 8 restores.

The advantages that design of present apparatus structure is simple, small in size, failure is few, and closure is stronger, long service life is equipped with first Briquetting, annular ring and diaphragm diaphragm can be isolated in valve body, conveniently break off the flowing of liquid.

The preferred embodiment of the patent is described in detail above, but this patent is not limited to above-mentioned embodiment party Formula within the knowledge of one of ordinary skill in the art can also be under the premise of not departing from this patent objective It makes a variety of changes.

Claims (4)

1. a kind of vacuum diaphragm valve, including shell (3) and piston (14) erect it is characterized in that: the shell (3) is set as cylindrical body Straight to place, outer layer uses stainless steel material；Type chamber (2) are equipped with inside the shell (3)；Type chamber (2) the upper end setting limit Block (1), limited block (1) and shell (3) are welded；Spring (4) are set below the limited block (1), spring (4) is placed on type chamber (2) in, spring (4) lower end connects piston (14), and piston (14) and shell (3) inner surface are in close contact；The piston (14) lower end is equipped with the second briquetting (13), and the second briquetting (13) upper surface is connect with piston (14) screw, second briquetting (13) connecting rod (9) of left and right ends difference screw connection；There are two the connecting rod (9) sets, about piston (14) central axis Symmetrically；Diaphragm (8) left and right ends are connected separately with annular ring (12), and annular ring (12) is set as L shape；Annular ring (12) upper and lower ends are respectively equipped with the first briquetting (5) and wedge (6), and the first briquetting (5) and wedge (6) are placed up and down and fixed company It connects, wedge (6) lower end is provided with valve body (10), and valve body (10) is connect with wedge (6) screw；The valve body (10) is internal left Right both ends are respectively equipped with import (7) and outlet (11)；The piston (14) includes annular groove (16) and guide groove (17)；The ring There are two shape slot (16) is set, about the substantially symmetrical about its central axis of piston (14)；First briquetting (5) inner surface installs stock screw (19), stock screw (19) lower end is fixedly connected in the first briquetting (5) inner surface, and upper end is equipped with nut (20), stock screw (19) and nut (20) composition attachment device includes；Shell (3) outer surface is arranged in the nut (20), with stock screw (19) phase It is threadedly coupled；Be additionally provided with gasket (18) in the middle part of first briquetting (5) volume and shell (3), gasket (18) respectively with the first briquetting (5) it is in close contact with shell (3).

2. a kind of vacuum diaphragm valve according to claim 1, it is characterized in that: diaphragm is arranged in the connecting rod (9) lower end (8), diaphragm (8) and connecting rod (9) limit connect.

3. a kind of vacuum diaphragm valve according to claim 1, it is characterized in that: the import (7) setting is on outlet (11) left side Diaphragm (8) are provided among end, import (7) and outlet (11).

4. a kind of vacuum diaphragm valve according to claim 1, it is characterized in that: being equipped with guide groove in the middle part of the annular groove (16) (17), the center overlapping of axles of part and central axis and piston (14) are arranged on piston (14) in guide groove (17).