CN215721195U

CN215721195U - Filling valve

Info

Publication number: CN215721195U
Application number: CN202120780145.3U
Authority: CN
Inventors: 史中伟; 史正; 周强华
Original assignee: Hangzhou Zhongya Machinery Co Ltd
Current assignee: Hangzhou Zhongya Machinery Co Ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2022-02-01
Anticipated expiration: 2031-04-16

Abstract

The utility model provides a filling valve, which solves the technical problems and comprises a valve body, a valve rod and an annular diaphragm which is connected between the valve body and the valve rod and used for isolating the inner space of the valve body, wherein a valve port is arranged on the valve body, a feed inlet which is arranged between the valve port and the connecting position of the diaphragm and the valve body is arranged on the side wall of the valve body, a through hole is arranged at the center of the diaphragm, the thickness of the inner edge and the outer edge of the diaphragm is larger than that of a diaphragm main body, and the cross section of the diaphragm main body is wavy; the utility model effectively avoids the risks of failure and cracking of the diaphragm in the long-time use process, and greatly prolongs the service life of the filling valve.

Description

Filling valve

Technical Field

The utility model relates to a filling valve used on filling equipment.

Background

The valve rod and the valve body are in close fit at the end part of the whole filling valve to realize opening and closing actions, so that the materials in the valve body are orderly output outwards; the diaphragm in the prior art has a very simple structure, and the cross section of the main body part of the diaphragm is of a flat rectangular structure. Because the outer edge and the middle part of the diaphragm are respectively fixed, the part of the diaphragm which is fixed and the main body part of the diaphragm frequently swing along with the movement of the valve rod, so that the diaphragm is continuously bent at the fixed part. The membrane is prone to cracking at the fixed location after long-term use. The cracking causes are not only the poor local fatigue resistance operation capability of the diaphragm, but also the unreasonable stress structure.

Furthermore, the structure of the edge portion of the diaphragm, which is embedded in the valve body and has a cross section in the shape of a combination of a rectangle and a semicircle, derives from the technology of the sealing ring, such as the structure shown in fig. 1. The structure is suitable for the use requirement of the sealing ring, and the sealing ring cannot move after being installed; however, when this structure is used in a diaphragm, the fatigue resistance of the diaphragm at the edge portion is significantly weakened because the diaphragm is in a very tightly clamped state under this mounting structure, which inherently causes the local portion of the diaphragm to be subjected to an external force equivalent to a shear force.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a filling valve, which solves the problems that a filling valve membrane in the prior art is volatile and cracked in a long-time use process.

The utility model provides a filling valve, which solves the technical problems and comprises a valve body, a valve rod and an annular diaphragm which is connected between the valve body and the valve rod and used for isolating the inner space of the valve body, wherein a valve port is arranged on the valve body, a feed inlet which is arranged between the valve port and the connecting position of the diaphragm and the valve body is arranged on the side wall of the valve body, a through hole is arranged at the center of the diaphragm, the thickness of the inner edge and the outer edge of the diaphragm is larger than that of a diaphragm main body, and the cross section of the diaphragm main body is wavy.

Preferably, the diaphragm is in sealing connection with the inner side wall of the valve body.

Preferably, the diaphragm is in sealing connection with the outer side wall of the valve rod.

Preferably, the number of the waves of the diaphragm body is 4-8.

Preferably, the valve body on install the adapter sleeve, the one end of adapter sleeve is inserted in the valve body and is arranged with the laminating of valve body inside wall, be formed with on the valve body inside wall and lie in the corresponding first step face of the inside one end terminal surface of valve body with the adapter sleeve, the terminal surface of adapter sleeve and first step face on all be formed with the recess corresponding with the diaphragm outward flange, the extrusion of diaphragm outward flange is installed between first step face and adapter sleeve terminal surface.

Preferably, the valve rod on the cover be equipped with and be located the inside solid fixed ring of valve body, be formed with on the valve body with solid fixed ring terminal surface corresponding second step face, solid fixed ring's terminal surface and second step face on all be formed with the recess corresponding with the diaphragm inward flange, the extrusion of diaphragm inward flange is installed between first step face and solid fixed ring's terminal surface.

Preferably, the inner edge and the outer edge of the diaphragm are of a convex structure, and the cross section of the convex structure is circular, oval or square.

According to the utility model, by designing the diaphragm structure with the wave-shaped main body section and the two side edges as the columnar bulges, when the diaphragm is used, the inner side edge and the outer side edge of the diaphragm are respectively connected with the valve rod and the valve body, and the connecting part is extruded and sealed by adopting the groove structure matched with the bulges at the edge part of the diaphragm, so that in the specific use process, along with the movement of the valve rod in the valve body, the diaphragm can improve the extensibility in the stretching and shrinking processes due to the wave-shaped structure, and meanwhile, the fatigue resistance of the diaphragm can be greatly improved by matching with the connecting structure at the edge part, and the service life of the diaphragm is prolonged.

In summary, the technical scheme of the utility model at least has the following beneficial effects:

1. the cross section of the main body part of the diaphragm is wavy, so that when the valve rod drives the diaphragm to move after reciprocating linearly, the diaphragm can match with the action of the valve rod through the deformation of the main body part, the movement of the diaphragm at the clamped part is reduced as much as possible, the cracking probability is obviously reduced due to the reduction of the swing of the clamped part, and the service life is prolonged;

2. the edge of the diaphragm is set to be in a shape with a circular cross section, the diaphragm can be fixed in the valve body with small clamping force, and the clamped part of the diaphragm is prevented from being seriously sheared force.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, 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 schematic view of a prior art diaphragm construction;

FIG. 2 is a schematic view of the application of the diaphragm structure of the present invention;

figure 3 is a cross-sectional view of a diaphragm construction of the present invention.

In the figure: a valve body 1; a valve stem 2; a membrane 3; a feed port 4; a protrusion 5; a connecting sleeve 6; a first step surface 7; a fixed ring 8; a second step surface 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a filling valve, as shown in attached figures 2 and 3, which comprises a valve body 1, a valve rod 2 and a diaphragm 3 connected between the valve body 1 and the valve rod 2, wherein the diaphragm 3 can separate the internal space of the valve body 1, a feed port 4 is arranged on the side wall of the valve body 1, and the feed port 4 and a valve port of the valve body 1 are positioned on the same side of the diaphragm 3; the valve rod 2 is positioned in the valve body 1 and movably connected in the valve body 1, one end of the diaphragm 3 is fixed on the inner side wall of the valve body 1, extrusion is formed between the connecting sleeve 6 and a first step surface 7 formed on the valve body 1, and sealing connection is formed by a bulge 5 structure on the outer edge of the diaphragm 3; one end of the connecting sleeve 6 is inserted into the valve body 1, and the connecting sleeve 6 and the valve body 1 can be in threaded connection or form extrusion force between the connecting sleeve 6 and the valve body 1 in a manner of applying pressure from the direction of the connecting sleeve 6; the other end of the diaphragm 3 is fixed on the valve rod 2, extrusion is formed between a fixing ring 8 and a second step surface 9 formed on the valve rod 2, and a bulge 5 structure on the inner edge of the diaphragm 3 is in sealing connection, the fixing ring 8 is sleeved on the valve rod 2, the position of the fixing sleeve is limited on the outer side of the fixing sleeve through a nut in threaded fit with the valve rod 2, and certain pretightening force is applied to the fixing sleeve to form extrusion on the diaphragm 3; one end of the inner side of the diaphragm 3 can move along with the valve rod 2, one side of the diaphragm 3 is fixed in the using process, and the other side of the diaphragm 3 needs to move frequently, so that the diaphragm 3 can be stretched, the diaphragm 3 is easy to generate fatigue and damage after being used for a long time, and the service life of the diaphragm is influenced.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.

Claims

1. A filling valve is characterized by comprising a valve body, a valve rod and an annular diaphragm which is connected between the valve body and the valve rod and used for isolating the inner space of the valve body, wherein a valve port is arranged on the valve body, a feed inlet which is arranged between the valve port and the connecting position of the diaphragm and the valve body is arranged on the side wall of the valve body, a through hole is formed in the center of the diaphragm, the thickness of the inner edge and the outer edge of the diaphragm is larger than that of a diaphragm main body, and the cross section of the diaphragm main body is wavy.

2. A filling valve according to claim 1, wherein the diaphragm is sealingly connected to the inner side wall of the valve body.

3. A filling valve according to claim 1, wherein the diaphragm is sealingly connected to the outer side wall of the valve stem.

4. The filling valve of claim 1, wherein the number of undulations of said diaphragm body is between 4 and 8.

5. The filling valve according to claim 2, wherein the valve body is provided with a connecting sleeve, one end of the connecting sleeve is inserted into the valve body and is attached to the inner side wall of the valve body, a first step surface corresponding to the end surface of the end of the connecting sleeve located inside the valve body is formed on the inner side wall of the valve body, grooves corresponding to the outer edge of the diaphragm are formed on the end surface of the connecting sleeve and the first step surface, and the outer edge of the diaphragm is extruded and installed between the first step surface and the end surface of the connecting sleeve.

6. The filling valve according to claim 3, wherein the valve stem is sleeved with a fixing ring located inside the valve body, a second step surface corresponding to the end surface of the fixing ring is formed on the valve body, grooves corresponding to the inner edges of the diaphragms are formed on the end surface of the fixing ring and the second step surface, and the inner edges of the diaphragms are arranged between the first step surface and the end surface of the fixing ring in a pressing manner.

7. The filling valve of claim 1, wherein the inner and outer edges of the diaphragm are of a convex configuration, the convex configuration being circular, oval or square in cross-section.