CN212248509U

CN212248509U - Built-in diaphragm closed expansion tank

Info

Publication number: CN212248509U
Application number: CN202020224242.XU
Authority: CN
Inventors: 虞新才; 江善强; 杜学军; 彭公波
Original assignee: Zhejiang Feida Seiko Machinery Co ltd
Current assignee: Zhejiang Feida Seiko Machinery Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-12-29
Anticipated expiration: 2030-02-28

Abstract

The embodiment of the utility model provides a built-in diaphragm closed expansion tank belongs to expansion tank technical field, expansion tank includes: a pneumatic housing; the edge of the water pressure shell and the edge of the air pressure shell are pressed into a whole to form an accommodating cavity; and the diaphragm, the diaphragm is used in the holding intracavity to divide into gas storage chamber and water storage chamber with the holding chamber, the diaphragm includes: the membrane frame is a closed frame body, one part of the membrane frame is arranged at the pressing part of the water pressure shell and the air pressure shell, and the other part of the membrane frame is positioned in the accommodating cavity; the membrane body is fixed on the membrane frame in a sealing way; wherein, the film frame has toughness and can deform; and a part of the torsion acting on the diaphragm is dispersed from the diaphragm body through the diaphragm frame. The technical effects of dispersing the twisting amount of the diaphragm in the twisting process and delaying the aging of the diaphragm are achieved.

Description

Built-in diaphragm closed expansion tank

Technical Field

The utility model relates to an expansion tank technical field especially relates to a built-in diaphragm closed expansion tank.

Background

The expansion tank is used for accommodating and compensating the expansion and contraction amount of water in the system and also used as system water supply. The existing expansion water tank is internally provided with a diaphragm for isolating a water storage cavity and a gas storage cavity, wherein the diaphragm is generally made of rubber and reaches the fixing purpose by being clamped between an air pressure shell and a water pressure shell.

When the expansion water tank is in a working state, the diaphragm is repeatedly moved back and forth on two sides of the air pressure shell and the water pressure shell. When the expansion water tank with a fault is maintained, cracks are found to be easy to appear at the connecting parts of the diaphragm and the shells on the two sides, and the diaphragm loses the separation effect when the cracks are deepened to form cracks. The reason for the easy occurrence of cracks is that the joint of the diaphragm and the shell bears most of the torsion amount through analysis, so that the working strength of the diaphragm is higher at the joint than at other positions.

Therefore, the technical problems of the prior art are as follows: the amount of twisting of the diaphragm during repeated twists is concentrated.

Disclosure of Invention

The embodiment of the application provides a built-in diaphragm closed expansion water tank, which solves the technical problem that the twisting amount of a diaphragm is concentrated in the repeated twisting process in the prior art; the technical effects of dispersing the twisting amount of the diaphragm in the twisting process and delaying the aging of the diaphragm are achieved.

The embodiment of the application provides a built-in diaphragm closed expansion tank, expansion tank includes: the air pressure shell is in a half-coating shape; the water pressure shell is in a half-coating shape, the water pressure shell and the air pressure shell are oppositely arranged, and the edge of the water pressure shell and the edge of the air pressure shell are pressed into a whole to form an accommodating cavity; and the diaphragm, the diaphragm is used in the holding intracavity to divide into gas storage chamber and water storage chamber with the holding chamber, the diaphragm includes: the membrane frame is a closed frame body, one part of the membrane frame is arranged at the pressing part of the water pressure shell and the air pressure shell, and the other part of the membrane frame is positioned in the accommodating cavity; the membrane body is fixed on the membrane frame in a sealing way; wherein, the film frame has toughness and can deform; and a part of the torsion acting on the diaphragm is dispersed from the diaphragm body through the diaphragm frame.

Preferably, the film frame is a thin sheet, and the film frame and the film body are bonded by glue.

Preferably, the membrane frame is made of polytetrafluoroethylene.

Preferably, a rivet for riveting is further arranged between the membrane frame and the membrane body, and the connection strength between the membrane frame and the membrane body is increased through the rivet.

Preferably, the shape of the membrane frame is matched with the shapes of the air pressure shell and the water pressure shell.

Preferably, the membrane frame is provided with a convex edge and/or a groove relative to the pressing part of the hydraulic pressure shell and the air pressure shell, and the membrane frame and the accommodating cavity are fixed tightly through the convex edge and/or the groove.

Preferably, the connecting surfaces between the diaphragm, the hydraulic housing and the pneumatic housing are coated with a sealant.

Preferably, the membrane body is positioned in the accommodating cavity.

Preferably, a clamping frame is arranged on the outer side of the pressing part of the air pressure shell and the water pressure shell, the clamping frame is clamped at the pressing part, and the edge of the clamping frame is provided with a sealing glue relative to the air pressure shell and the water pressure shell.

One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:

1. in the embodiment of the application, the film frame is arranged outside the film body, and the film frame is used for bearing the torsion amount of a part of the film body during torsion, so that the torsion amount of the film body is reduced, and the actual service life of the film body is prolonged. Meanwhile, the film frame is arranged, so that the phenomenon that the actual service life of the film body is influenced due to partial thin pressed film body caused by the fact that the film body is not placed in a right position or uneven pressure is applied during pressing when the film body is directly pressed between the air pressure shell and the water pressure shell is avoided; the technical problem of concentrated twisting amount of the diaphragm in the repeated twisting process in the prior art is solved; the technical effects of dispersing the twisting amount of the diaphragm in the twisting process and delaying the aging of the diaphragm are achieved.

2. In this application embodiment, through setting up the membrane frame into the lamellar body for the membrane frame of polytetrafluoroethylene material can relapse crooked deformation, and because polytetrafluoroethylene's chemical property is stable, does not produce poisonous and harmful substance when contacting with the water storage chamber.

3. In the embodiment of the application, the membrane frame is a whole, and the convex edges or the grooves on the membrane frame are integrally formed by machining, so that the connection strength of the membrane at the pressing part is further enhanced.

4. In the embodiment of the application, through a card frame at the overcoat for the pressfitting department of water pressure casing and atmospheric pressure casing is protected by further, avoids the external environment to the corruption of pressfitting department, makes whole expansion tank's water storage gas storage ability stable.

Drawings

Fig. 1 is a schematic structural diagram of a built-in diaphragm sealed expansion tank in the embodiment of the present application in a main view direction;

FIG. 2 is a schematic diagram of a side view of a sealed expansion tank with a built-in diaphragm according to an embodiment of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a schematic diagram of the top view of an internal diaphragm sealed expansion tank according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of an internal diaphragm sealed expansion tank according to an embodiment of the present application;

fig. 6 is an enlarged view at B in fig. 5.

Reference numerals: 1. a pneumatic housing; 11. an air inlet; 2. a hydraulic housing; 21. a water inlet; 3. clamping a frame; 31. sealing glue; 4. a diaphragm; 41. a membrane body; 42. a film frame; 421. convex edges; 5. a fixing frame.

Detailed Description

The embodiment of the application provides a built-in diaphragm 4 closed expansion tank, and a diaphragm frame 42 is arranged outside a diaphragm body 41, and the diaphragm frame 42 is utilized to bear a part of torsion amount during torsion, so that the torsion amount of the diaphragm body 41 is reduced, and the actual service life of the diaphragm body 41 is prolonged. Meanwhile, the film frame 42 is arranged, so that the influence on the actual service life of the film body 41 caused by that the film body 41 is partially pressed because the film body 41 is not placed correctly or the pressing is not uniform when the film body 41 is directly pressed between the air pressure shell 1 and the water pressure shell 2 is avoided; the technical problem that the twisting amount of the diaphragm 4 is concentrated in the repeated twisting process in the prior art is solved; the technical effects of dispersing the twisting amount of the diaphragm 4 in the twisting process and delaying the aging of the diaphragm 4 are achieved.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

Example one

A built-in diaphragm 4 closed expansion tank, which comprises: the pneumatic shell 1, the hydraulic shell 2, the diaphragm 4 and the clamping frame 3. The air pressure shell 1 and the water pressure shell 2 are pressed to form an accommodating cavity, the diaphragm 4 is positioned in the accommodating cavity and divides the accommodating cavity into an air storage cavity and a water storage cavity; the clamping frame 3 covers the pressing part of the air pressure shell 1 and the water pressure shell 2 from the outer side.

The air pressure shell 1 is in a half-wrapped shape, and the concave side is used as a part of the air storage cavity. Preferably, metal or plastic materials are adopted, and when the plastic materials are adopted, the pressing can be replaced by hot pressing.

The water pressure shell 2 is in a half-covered shape, and the concave side is used as a part of the water storage cavity. The water pressure shell 2 and the air pressure shell 1 are oppositely arranged, and the edge of the water pressure shell 2 and the edge of the air pressure shell 1 are pressed into a whole to form a containing cavity.

A membrane 4, the membrane 4 acting in the housing chamber, the membrane 4 comprising: the membrane frame 42 and the membrane body 41, wherein the membrane body 41 is located in the accommodating cavity, and the membrane body 41 is not in contact with the cavity wall of the accommodating cavity. The membrane body 41 is hermetically fixed on the membrane frame 42, the membrane frame 42 and the membrane body 41 form an isolation surface for isolating the accommodating cavity, and the membrane frame 42 has toughness and is deformable; and the diaphragm 4 is made of rubber and can deform. In the case where both the frame 42 and the diaphragm 4 are torsionally deformable, a part of the amount of torsion acting on the diaphragm 4 is dispersed from the diaphragm 41 by the frame 42, so that the amount of torsion of the diaphragm 41 is reduced, and rapid aging and cracking of the diaphragm 41 due to large-amplitude torsion are prevented.

The membrane frame 42 is a closed frame, and the shape of the membrane frame 42 is matched with the shape of the air pressure shell 1 and the water pressure shell 2. Preferably, the film frame 42 is made of polytetrafluoroethylene and is a thin sheet, and the film frame 42 and the film body 41 are bonded to each other by adhesive. One part of the membrane frame 42 is arranged at the pressing part of the water pressure shell 2 and the air pressure shell 1, and the other part of the membrane frame 42 is positioned in the accommodating cavity;

specifically, a rivet for riveting is further provided between the film frame 42 and the film body 41, and the connection strength between the film frame 42 and the film body 41 is increased by the rivet. The membrane frame 42 is provided with a convex edge 421 and/or a groove corresponding to the pressing part of the hydraulic shell 2 and the hydraulic shell 1, and the membrane frame 42 and the accommodating cavity are fixed tightly through the convex edge 421 and/or the groove. Wherein, the connection surfaces among the membrane frame 42, the water pressure shell 2 and the air pressure shell 1 are coated with the sealant 31.

Card frame 3, the outside that is used in the pressfitting department of atmospheric pressure casing 1 and water pressure casing 2 is established, and 3 joints of card frame are in pressfitting department, and the edge of card frame 3 is provided with sealed glue 31 for atmospheric pressure casing 1 and water pressure casing 2, further guarantees the gas tightness in holding chamber.

The working principle is as follows:

increase round membrane frame 42 for the membrane body 41, through the structure of polytetrafluoroethylene material cooperation lamellar body for membrane frame 42 also has the ability of deformation, can deform through membrane frame 42 and undertake some deformation for membrane body 41, reaches the purpose that reduces membrane body 41 deformation, avoids the inner wall contact and the friction of membrane body 41 and holding chamber through membrane frame 42, further guarantees membrane body 41's life.

The technical effects are as follows:

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A closed expansion tank with a built-in diaphragm is characterized by comprising:

the air pressure shell is in a half-coating shape;

the water pressure shell is in a half-coating shape, the water pressure shell and the air pressure shell are oppositely arranged, and the edge of the water pressure shell and the edge of the air pressure shell are pressed into a whole to form an accommodating cavity; and

the diaphragm, the diaphragm is used in the holding intracavity to divide into gas storage chamber and water storage chamber with the holding chamber, the diaphragm includes:

the membrane frame is a closed frame body, one part of the membrane frame is arranged at the pressing part of the water pressure shell and the air pressure shell, and the other part of the membrane frame is positioned in the accommodating cavity;

the membrane body is fixed on the membrane frame in a sealing way;

wherein, the film frame has toughness and can deform; and a part of the torsion acting on the diaphragm is dispersed from the diaphragm body through the diaphragm frame.

2. The closed expansion tank with built-in diaphragm as claimed in claim 1, wherein said diaphragm frame is a thin sheet, and said diaphragm frame and said diaphragm are glued together.

3. The internal diaphragm sealed expansion tank of claim 2, wherein said diaphragm frame is made of teflon.

4. The internal diaphragm closed expansion tank as claimed in claim 2, wherein a rivet for riveting is further provided between the diaphragm frame and the diaphragm body, and the coupling strength between the diaphragm frame and the diaphragm body is increased by the rivet.

5. The internal diaphragm closed expansion tank as claimed in claim 1, wherein the shape of said diaphragm frame is matched to the shape of the pneumatic and hydraulic casings.

6. The internal diaphragm closed expansion tank as claimed in claim 1, wherein the film frame is provided with ridges and/or grooves at the pressing part with respect to the hydraulic casing and the pneumatic casing, and the film frame and the accommodating chamber are tightly fixed by the ridges and/or grooves.

7. The internal diaphragm sealed expansion tank of claim 1, wherein the joint surfaces between the diaphragm, the hydraulic housing and the pneumatic housing are coated with a sealant.

8. The internal diaphragm closed expansion tank as claimed in claim 1, wherein the diaphragm is located in the housing chamber.

9. The closed expansion tank with built-in diaphragm as claimed in any one of claims 1 to 8, wherein a clamping frame is provided at an outer side of a pressing portion of the pneumatic casing and the hydraulic casing, the clamping frame is clamped at the pressing portion, and an edge of the clamping frame is provided with a sealant relative to the pneumatic casing and the hydraulic casing.