CN210715033U

CN210715033U - Integrated hard sealing diaphragm of diaphragm compressor

Info

Publication number: CN210715033U
Application number: CN201921681463.3U
Authority: CN
Inventors: 王勇; 吴涛; 李友恒; 刘建杰; 张迈
Original assignee: Sichuan Jinxing Clean Energy Equipment Co ltd
Current assignee: Sichuan Jinxing Clean Energy Equipment Co ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-06-09
Anticipated expiration: 2029-10-10

Abstract

The utility model discloses an integrated hard sealing diaphragm of a diaphragm compressor; and directly electroplating a layer of copper alloy on the process side diaphragm and the oil side diaphragm in an electroplating mode. A layer of copper alloy is directly electroplated on the diaphragm in an electroplating mode, the electroplated layer can replace an O-shaped ring as a hard seal and serve as a sealing material, the copper alloy has certain ductility, the air cylinder can have certain deformation amount under the fastening of the bolt, and the electroplated layer can be tightly attached to the upper air cylinder and the lower air cylinder after being deformed, so that the sealing effect is realized; the buffer layer is provided with stop crack hole and off-load groove, and the off-load groove can be fast with the gaseous quick transmission of leaking to set up on pressure sensor or manometer, the relief valve of leakage detection hole, plays the purpose of short-term test, and the stop crack hole can prevent the off-load groove fracture on the buffer layer, improves the life of buffer layer and reduces the processing degree of difficulty of buffer layer at processing off-load groove.

Description

Integrated hard sealing diaphragm of diaphragm compressor

Technical Field

The utility model relates to a diaphragm compressor seals relevant field, specifically diaphragm compressor integration hard seal diaphragm that says so.

Background

The diaphragm compressor is determined by its structural characteristics. The compressor is widely applied to compressing and conveying various high-purity gases, precious rare gases, toxic and harmful gases and corrosive gases, and can be more widely applied as an irreplaceable positive displacement compressor along with the progress and development of scientific technology and the continuous improvement of the living standard of people. The main application fields of the diaphragm compressor are as follows: nuclear power nuclear energy, food and medicine, petrochemical industry, electronic industry, material industry, national defense military industry, scientific experiment and other industry departments.

The diaphragm compressor is driven by a motor, a crankshaft is rotated through a V-belt wheel, a piston in an oil cylinder is made to do reciprocating linear motion through a connecting rod, oil is pushed, a diaphragm is made to do reciprocating vibration, and the diaphragm vibrates once under the control of an air suction and exhaust valve, so that the air suction and exhaust processes are completed. When the film press works, a small amount of oil in the oil cylinder leaks into the crankcase through the gaps among the piston ring, the cylinder wall and the ring groove. In order to compensate the oil quantity, the diaphragm can be tightly attached to the curved surface of the cylinder cover when the compression stroke is finished, the compression medium is discharged, the compensation oil pump injects oil into the oil cylinder in the suction stroke of the diaphragm press, the oil quantity is slightly more than the leakage quantity, and the redundant oil quantity flows back to the crankcase through a pressure regulating valve for controlling the oil pressure when the compression stroke is finished.

The membrane press mainly comprises a crankcase, a crankshaft, a connecting rod cylinder and the like, wherein the cylinder comprises a cylinder cover, an oil distribution disc, a cylinder body, an air valve and other parts. The cylinder cover and the oil distribution disc are respectively provided with a curved surface with the same coordinate, the diaphragm is clamped between the curved surfaces, the cylinder cover is provided with an air suction valve and an air exhaust valve, and the oil distribution disc is drilled with small holes so that a cavity below the diaphragm is communicated with the oil cylinder. The piston of the cylinder is connected with a main connecting rod, the crosshead is connected with the connecting rod, the crank pin is connected with the big end of the connecting rod, and the crankshaft is supported on a crankcase through two bearings. Because the diaphragm separates the cylinder and the oil cylinder completely, the compressed medium is not contacted with the oil, thereby avoiding the pollution of the oil and ensuring the purity of the compressed medium. The cylinder is composed of a curved surface of the cylinder cover and a diaphragm, and is a closed cavity, so that the cylinder has excellent sealing performance.

Traditional diaphragm compressor diaphragm is overlapped together by three-layer diaphragm, divide into technology side diaphragm, oil side diaphragm, buffer layer, and O type circle (like figure 1) is adopted in the sealed O type circle (like figure 1) between general diaphragm and the cylinder, and O type circle result of use is better under low pressure environment, but when high pressure environment, O type circle is inefficacy easily.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the above-mentioned deficiencies, the present invention provides an integrated hard sealing diaphragm for a diaphragm compressor; a layer of copper alloy (other alloys can also be adopted) is directly electroplated on the diaphragm in an electroplating mode, as shown in figures 2 and 3, the electroplated layer can replace an O-shaped ring as a hard seal and serve as a sealing material, the copper alloy has certain ductility, a cylinder can have certain deformation amount under the fastening of a bolt, and the electroplated layer can be tightly attached to an upper cylinder and a lower cylinder after being deformed, so that the sealing effect is realized.

The utility model is realized in such a way that an integrated hard sealing diaphragm of the diaphragm compressor is constructed, and the diaphragm is overlapped by three diaphragms and is divided into a process side diaphragm, a buffer layer and an oil side diaphragm; and directly electroplating a layer of copper alloy on the process side diaphragm and the oil side diaphragm in an electroplating mode.

The utility model discloses a diaphragm compressor integration hard seal diaphragm, which is characterized in that; the process side membrane material is stainless steel, and the buffer layer is copper or stainless steel; the overall thickness of the diaphragm compressor is 0.3-0.5 mm.

The utility model discloses a diaphragm compressor integration hard seal diaphragm, which is characterized in that; the electroplating is divided into three stages of pretreatment before electroplating, electroplating and post-plating treatment, and the initial color of a copper plating layer is pink, is soft in quality, has good ductility, electric conductivity and thermal conductivity, is easy to polish, and is bronze after chemical treatment.

The utility model discloses a diaphragm compressor integration hard seal diaphragm, which is characterized in that; the thickness of the copper alloy is about 0.1-1 mm, and the width is about 2-6 mm; and polishing the electroplated layer after electroplating, wherein the polishing roughness must be less than 0.8 grade.

The utility model discloses a diaphragm compressor integration hard seal diaphragm, which is characterized in that; there is the bolt mounting hole in the plating layer outer lane, because the diaphragm can be toward middle shrink in compression process, so the mounting hole needs to be designed for open, allows certain displacement, also easy to assemble, and the mounting hole is not limited to 4.

The utility model discloses a diaphragm compressor integration hard seal diaphragm, which is characterized in that; the buffer layer is provided with mounting holes, and unloading grooves are required to be arranged between bolt mounting holes, as the process side membrane and the oil side membrane have the risk of breakage, in order to quickly conduct leaked gas or oil to a leakage detection device of the compressor, a quick flow channel needs to be arranged, the unloading grooves are formed by drilling a circular hole in the middle of the membrane and cutting one unloading groove from the circular hole; the relief groove opening is not limited to a circle, and the number of relief grooves is not limited to 4.

The utility model has the advantages of as follows: the utility model discloses mainly adopt O type circle (as in figure 1) to traditional diaphragm compressor diaphragm and sealed between the cylinder, O type circle result of use is better under low pressure environment, but when high pressure environment, O type circle easy inefficacy problem, solve traditional diaphragm simultaneously and do not set up the locating hole, the easy dislocation problem during diaphragm installation, solve traditional diaphragm simultaneously though have similar design of off-load groove, but do not have the stopping hole, easily prolong the off-load groove and tear the buffer chip problem; in order to solve the problem, the present invention provides an integrated hard sealing diaphragm of a diaphragm compressor by improving the following improvements and advantages;

firstly, a layer of copper alloy (other alloys can be adopted) is directly electroplated on the diaphragm in an electroplating mode, as shown in fig. 2 and 3, the electroplated layer can replace an O-shaped ring as a hard seal and serve as a sealing material, the copper alloy has certain ductility, a cylinder can have a certain deformation amount under the fastening of a bolt, and the electroplated layer can be tightly attached to an upper cylinder and a lower cylinder after being deformed, so that the sealing effect is realized. The electroplating is divided into three stages of pretreatment before electroplating, electroplating and post-plating treatment, and the initial color of a copper plating layer is pink, is soft in quality, has good ductility, electric conductivity and thermal conductivity, is easy to polish, and is bronze after chemical treatment.

The thickness of the electroplated layer is about 0.1-1 mm, and the width is about 2-6 mm. The phenomenon that the deformation is insufficient and the lamination cannot be firm when the thickness is too thin is prevented; if the thickness is too thick, the strength is insufficient, and high-pressure gas cannot be sealed. And polishing the electroplated layer after electroplating, wherein the polishing roughness must be less than 0.8 grade.

Third, there is the bolt mounting hole in the plating layer outer lane, because the diaphragm can toward the centre shrink in compression process, so the mounting hole needs to be designed for open, allows certain displacement, also easy to assemble, and the mounting hole is not limited to 4.

And fourthly, the buffer layer is provided with unloading grooves among the mounting holes besides the mounting holes, and the unloading grooves are used as fast flowing channels for fast conducting leaked gas or oil to a leakage detection device of the compressor due to the risk of breakage of the process side diaphragm and the oil side diaphragm. As shown in figure 6, the unloading groove is formed by drilling a circular crack-stopping hole at the middle position of the diaphragm and cutting an unloading groove from the circular hole, wherein the purpose of drilling is to stop cracks and prevent the unloading groove from cracking along the unloading groove. The relief groove opening is not limited to a circle, and the number of relief grooves is not limited to 4.

Drawings

FIG. 1 is a schematic view of a conventional O-ring seal between a diaphragm and a cylinder;

FIG. 2 is a schematic view of the sealing membrane of the present invention;

FIG. 3 is a schematic representation of a process side membrane and an oil side membrane;

FIG. 4 is a schematic view of bolt mounting holes for the process side diaphragm and the oil side diaphragm;

FIG. 5 is a schematic of a buffer layer membrane;

FIG. 6 is a schematic view of a buffer layer diaphragm relief groove.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 6, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses an improve and provide a diaphragm compressor integration hard seal diaphragm here, mainly adopt O type circle (as figure 1) to the sealed between traditional diaphragm compressor diaphragm and cylinder, O type circle result of use is better under low pressure environment, but when high pressure environment, O type circle inefficacy easily, in order to solve this problem, this patent is one deck copper alloy 4 (also can adopt other alloys) of direct electroplating through the form of electroplating on the diaphragm, as shown in figure 2 and figure 3, the plating layer can replace O type circle as hard seal, as sealing material, the copper alloy has certain ductility, the cylinder is under the fastening of bolt, can have certain deflection, can closely laminate with upper and lower cylinder after the deformation of plating layer, realize sealed effect. The electroplating is divided into three stages of pretreatment before electroplating, electroplating and post-plating treatment, and the initial color of a copper plating layer is pink, is soft in quality, has good ductility, electric conductivity and thermal conductivity, is easy to polish, and is bronze after chemical treatment.

As shown in FIG. 3, the copper alloy has a thickness of about 0.1 to 1mm and a width of about 2 to 6 mm. The phenomenon that the deformation is insufficient and the lamination cannot be firm when the thickness is too thin is prevented; if the thickness is too thick, the strength is insufficient, and high-pressure gas cannot be sealed. And polishing the electroplated layer after electroplating, wherein the polishing roughness must be less than 0.8 grade.

As shown in fig. 4, there is a bolt mounting hole 5 on the outer ring of the electroplated layer, because the diaphragm will shrink towards the middle during the compression process, the mounting hole needs to be designed to be open, allows a certain displacement, and is also easy to install, and the number of the mounting holes is not limited to 4.

As shown in fig. 5, the buffer layer is provided with relief grooves 6 between bolt mounting holes in addition to mounting holes, and since there is a risk of rupture of the process-side diaphragm and the oil-side diaphragm, the relief grooves 6 serve as fast flow passages for fast conduction of leaked gas or oil to the leakage detection device of the compressor. As shown in figure 6, the unloading groove is formed by drilling a circular crack-stopping hole 7 at the middle position of the diaphragm and cutting a unloading groove from the circular hole, wherein the purpose of drilling is to stop cracks and prevent the unloading groove from cracking along the unloading groove. The relief groove opening is not limited to a circle, and the number of relief grooves is not limited to 4.

In summary, the utility model discloses an integrated hard sealing diaphragm of a diaphragm compressor; the three films are overlapped together and divided into a process side film 1, a buffer layer 2 and an oil side film 3, and a layer of copper alloy 4 is directly electroplated on the process side film 1 and the oil side film 3 in an electroplating mode. A layer of copper alloy 4 (other alloys can be adopted) is directly electroplated on the diaphragm in an electroplating mode, as shown in fig. 2 and 3, the electroplated layer can replace an O-shaped ring as a hard seal and serve as a sealing material, the copper alloy has certain ductility, a cylinder can have certain deformation amount under the fastening of a bolt, and the electroplated layer can be tightly attached to an upper cylinder and a lower cylinder after being deformed, so that the sealing effect is realized; the process side diaphragm 1 and the oil side diaphragm 3 are provided with positioning holes, so that the installation is convenient, the diaphragm installation precision is improved, and the diaphragm displacement is prevented; buffer layer 2 is provided with stop crack hole and off-load groove, and the off-load groove can be fast with the gaseous quick transmission of leaking to set up on pressure sensor or manometer, the relief valve of leakage detection hole, plays the purpose of short-term test, and the stop crack hole can prevent the off-load groove fracture on the buffer layer 2, improves buffer layer 2's life and reduces buffer layer 2 and the processing degree of difficulty at processing off-load groove.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated hard sealing diaphragm of a diaphragm compressor is overlapped by three diaphragms and is divided into a process side diaphragm (1), a buffer layer (2) and an oil side diaphragm (3), and is characterized in that; and directly electroplating a layer of copper alloy (4) on the process side diaphragm (1) and the oil side diaphragm (3) in an electroplating mode.

2. The diaphragm compressor integrated hard seal diaphragm of claim 1, wherein; the process side diaphragm (1) is made of stainless steel, and the buffer layer (2) is made of copper or stainless steel; the overall thickness of the diaphragm compressor is 0.3-0.5 mm.

3. The diaphragm compressor integrated hard seal diaphragm of claim 1, wherein; the thickness of the copper alloy (4) is 0.1-1 mm, and the width is 2-6 mm; and polishing the electroplated layer after electroplating, wherein the polishing roughness must be less than 0.8 grade.

4. The diaphragm compressor integrated hard seal diaphragm of claim 1, wherein; the outer ring of the electroplated layer is provided with a bolt mounting hole (5).

5. The diaphragm compressor integrated hard seal diaphragm of claim 4, wherein; an unloading groove (6) is arranged between the bolt mounting holes (5), the unloading groove is used as a fast flowing channel, and the unloading groove (6) is used for drilling a circular crack-stopping hole (7) at the middle position of the diaphragm.