CN203835684U - Membrane - Google Patents

Abstract

The utility model provides a membrane, and belongs to the technical field of machinery. The membrane solves the problem that an existing membrane is inconvenient to install and comprises a cylindrical body. The top surface of the cavity of the body is a plane. The outer edge of one end of the body is provided with an annular sealing portion, the sealing portion protrudes out of the outer side wall of the body, and the section of the sealing portion is arc. The membrane has the advantages of being simple in structure and convenient to install.

Description

A kind of diaphragm

Technical field

The utility model belongs to field of mechanical technique, relates to a kind of diaphragm.

Background technique

Pump is a kind of fluid conveying machine, and high-pressure service pump is wherein widely used in the fields such as chemical industry, pharmacy, hydraulic transmission.The high-pressure service pump of application is mostly plunger pump at present, and this pump exists some defect, and the one, because its piston need to move reciprocatingly, therefore to the accuracy of manufacturing of piston and oil hydraulic cylinder, require very high; The 2nd, because the to-and-fro motion of plunger pump piston often can cause the wearing and tearing of piston and oil hydraulic cylinder, thereby affect the working life of pump; Secondly, general plunger pump volume is all larger, has therefore limited its application.The pump of another kind of extensive use is diaphragm pump, though it has overcome the defect of plunger pump, but because the barrier film of existing diaphragm pump is to be made by non-metallic elastic materials such as rubber, this class material all can not bear high pressure, therefore existing diaphragm pump can not be applied to the occasion of elevated pressures.

The high pressure resistant combined type barrier film [application number: 201320100483.3 of the high-pressure diaphragm pump openly proposing as Chinese patent literature data; Notice of authorization number: CN 203189246 U], this high pressure resistant combined type barrier film comprises the nonmetal elastic packing diaphragm of one deck and is compound in one or more layers metallic elastic diaphragm in nonmetal elastic sealing film, nonmetal elastic packing diaphragm and one or more layers metallic elastic diaphragm seal are connected in the opening of the liquid container of high-pressure diaphragm pump, one or more layers metallic elastic diaphragm changes the volume of liquid container by resiliently deformable, realize suction or the eliminating of liquid.But the sidewall undulate of this combined type barrier film, so it installs inconvenience.

Summary of the invention

The purpose of this utility model is to have the problems referred to above for existing technology, has proposed a kind of installation diaphragm comparatively easily.

The purpose of this utility model can realize by following technical proposal: a kind of diaphragm, comprise tubular body, it is characterized in that, the inner chamber end face of described body is plane, one end outer rim of described body has the sealed department that is circular, described sealed department protrudes from the outer side wall of described body, and the cross section of described sealed department is circular arc.

Body is tubular and its inner chamber end face is plane, make the cavity of body there is larger volume, and there is installation advantage comparatively easily, because sealed department protrudes from the outer side wall of body and the cross section of sealed department is circular arc, make this diaphragm there is good sealing effect.

In above-mentioned diaphragm, the sidewall of described body is that the sidewall of arc surface and described body opens toward outside.The sidewall of body is arc surface, makes the larger advantage of volume of the cavity of body.

In above-mentioned diaphragm, the end face of described body also has protrusion and cylindrical boss.The end face of body has the boss of protrusion, in use, plays the effect of buffering.

In above-mentioned diaphragm, diaphragm adopts P502 one-body molded, and P502 is 2-ethylhexyl phosphonic acids two (2-ethylhexyl) ester, and diaphragm adopts P502 one-body molded, has advantages of easily manufactured and intensity is higher.

In above-mentioned diaphragm, it between the top of described body and sidepiece, is arc transition.Between the top of body and sidepiece, be arc transition, there is the stress of reducing and concentrate, have advantages of that working life is longer.

In above-mentioned diaphragm, the top of described body has through hole.

Compared with prior art, this diaphragm has the following advantages:

1, the body of this diaphragm is tubular and its inner chamber end face is plane, makes the cavity of body have larger volume, and has installation advantage comparatively easily;

2, this sealed department of this diaphragm protrudes from the outer side wall of body and the cross section of sealed department is circular arc, makes this diaphragm have good sealing effect;

3, the sidewall of the body of this diaphragm is conical surface, makes the larger advantage of volume of the cavity of body;

4, diaphragm adopts P502 one-body molded, has advantages of easily manufactured and intensity is higher.

Accompanying drawing explanation

Fig. 1 is the cross-sectional schematic of this diaphragm.

In figure, 1, body; 2, sealed department; 3, boss; 4, through hole.

Embodiment

Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

As shown in Figure 1, a kind of diaphragm, this diaphragm adopts P502 one-body molded, and P502 is 2-ethylhexyl phosphonic acids two (2-ethylhexyl) ester, has advantages of easily manufactured and intensity is higher.It comprises tubular body 1, and the inner chamber end face of body 1 is plane, and one end outer rim of body 1 has the sealed department 2 that is circular, and sealed department 2 protrudes from the outer side wall of body 1, and the cross section of described sealed department 2 is circular arc.The sidewall of body 1 is arc surface, and the sidewall of body 1 is arc surface, makes the larger advantage of volume of the cavity of body 1.The sidewall of body 1 opens toward outside, and the end face of body 1 also has protrusion and cylindrical boss 3, in use, plays the effect of buffering.Between the top of body 1 and sidepiece, be arc transition, there is the stress of reducing and concentrate, have advantages of that working life is longer.The top of body 1 has through hole 4.

Body 1 is tubular and its inner chamber end face is plane, make the cavity of body 1 there is larger volume, and there is installation advantage comparatively easily, because sealed department 2 protrudes from the outer side wall of body 1 and the cross section of sealed department 2 is circular arc, make this diaphragm there is good sealing effect.

Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Although more used the terms such as body 1, sealed department 2, boss 3, through hole 4 herein, do not got rid of the possibility of using other term.Use these terms to be only used to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with the utility model spirit.

Claims (5)

1. a diaphragm, comprise tubular body (1), it is characterized in that, the inner chamber end face of described body (1) is plane, one end outer rim of described body (1) has the sealed department (2) that is circular, described sealed department (2) protrudes from the outer side wall of described body (1), and the cross section of described sealed department (2) is circular arc.

2. diaphragm according to claim 1, is characterized in that, the sidewall of described body (1) is that the sidewall of arc surface and described body (1) opens toward outside.

3. diaphragm according to claim 1, is characterized in that, the end face of described body (1) also has protrusion and cylindrical boss (3).

4. according to the diaphragm described in claim 1 or 2 or 3, it is characterized in that, is arc transition between the top of described body (1) and sidepiece.

5. according to the diaphragm described in claim 1 or 2 or 3, it is characterized in that, the top of described body (1) has through hole (4).