CN210599442U

CN210599442U - Compressor protection device

Info

Publication number: CN210599442U
Application number: CN201921379911.4U
Authority: CN
Inventors: 骆春生; 徐彬; 任玉泉
Original assignee: Hefei Tongzhi Electrical Control Technology Co ltd
Current assignee: Hefei Tongzhi Electrical Control Technology Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-05-22
Anticipated expiration: 2029-08-23

Abstract

The utility model discloses a compressor protection device, which comprises a pressure plate and an exhaust hole arranged on the pressure plate, wherein the pressure plate is provided with a pressure relief hole, the pressure relief hole is positioned at one side of the exhaust hole, and the pressure plate is provided with a valve plate mechanism for opening and closing the exhaust hole and the pressure relief hole; the other end crimping of discharge valve piece in the outside in exhaust hole, the other end crimping of pressure release valve piece is in the outside in pressure release hole, the pressure release valve piece is located between discharge valve piece and the pressure disk, the pressure release valve piece with be connected with the spring between the discharge valve piece, this application is through setting up exhaust hole and pressure release hole, and then can be quick with the compressor in the high pressure intracavity pressure reduce to safe value, the safety device response time of this application is short, does not have unnecessary controlling means, and the compressor air inlet end's of effectual utilization negative pressure environment has increased the speed of step-down moreover.

Description

Compressor protection device

Technical Field

The utility model relates to a compressor technical field specifically is a compressor protection device.

Background

In the field of compressor technology, compressor safety control is one of the important issues to be considered in product design. When the pressure of the gas discharged by the compressor is too high and exceeds the safe pressure borne by the compressor shell, explosion can be generated to damage the compressor and an air conditioning system, and damage can be caused to the periphery. Along with the continuous improvement of the safety requirements of customers on the whole compressor, the compressor protection under the overpressure state has higher requirements.

The existing overvoltage protection devices on the current market mainly realize the following processes: the protection device is that a temperature sensing sheet is arranged on the high-pressure cavity side of the compressor shell, and when the pressure of the discharged gas is too high and exceeds a safety value, the corresponding gas temperature is too high. When the temperature value exceeds the set temperature value, the temperature sensing piece feeds an overpressure signal back to the controller, the controller sends a stop signal to the compressor, the compressor stops working after receiving the stop signal, and the pressure of the discharged gas is not increased at the moment. If one fails, the overvoltage protection device can fail. The operation method is that when the pressure exceeds the safety value, the compressor stops working directly to ensure the safety state, but the high-pressure gas is required to be reduced below the safety value slowly, and the compressor can be restarted to work. The recovery time is longer.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compressor protection device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a compressor protection device comprises a pressure plate and an exhaust hole formed in the pressure plate, wherein a pressure relief hole is formed in the pressure plate and is located on one side of the exhaust hole, and a valve plate mechanism for opening and closing the exhaust hole and the pressure relief hole is arranged on the pressure plate;

the valve block mechanism comprises an exhaust valve block and a pressure relief valve block, one end of the exhaust valve block and one end of the pressure relief valve block are fixedly connected with the pressure plate, the other end of the exhaust valve block is in compression joint with the outer side of the exhaust hole, the other end of the pressure relief valve block is in compression joint with the outer side of the pressure relief hole, the pressure relief valve block is located between the exhaust valve block and the pressure plate, and a spring is connected between the pressure relief valve block and the exhaust valve block.

As a further aspect of the present invention: the exhaust hole is communicated with a high-pressure air cavity of the compressor, and the pressure relief hole is communicated with a low-pressure air inlet cavity of the compressor.

As a further aspect of the present invention: the outer side of the exhaust valve plate is provided with a limiting plate, and one end of the limiting plate is fixedly connected with the pressure plate.

As a further aspect of the present invention: the other end of the limiting piece is far away from the pressure plate to form a space for containing the exhaust valve piece to bounce.

As a further aspect of the present invention: one end of the limiting piece, the exhaust valve piece and the pressure relief valve piece is fixedly connected with the pressure plate through a fixing bolt.

As a further aspect of the present invention: the exhaust valve plate and the pressure relief valve plate are elastic metal plates.

As a further aspect of the present invention: the projection of the pressure relief valve plate on the pressure plate is far away from the exhaust hole and covers the pressure relief hole.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the application is through setting up exhaust hole and pressure release hole, and be equipped with the valve block mechanism that is used for opening or closing the exhaust hole, pressure release hole outside the exhaust hole, high-pressure gas through discharging in the exhaust hole is as power, be used for pushing open the discharge valve block, the pressure release valve block, under normal operating condition, the high-pressure gas of compressor is discharged through the exhaust hole, the discharge valve block is pushed open, the exhaust hole is opened, high-pressure gas in the compressor discharges, when the compressor, when the pressure in the high-pressure air chamber of compressor is higher than the threshold value that sets up, the angle that the discharge valve block was pushed open increases, and then take the relief valve block through the discharge valve block, the pressure release hole is opened, increase the runner of high-pressure gas discharge, high-pressure gas's emission speed has been accelerated, and then can be quick with the pressure in the high-pressure air chamber in the, the negative pressure environment at the air inlet end of the compressor is effectively utilized, and the pressure reduction speed is increased;

2. the system has the advantages of simple structure, low cost, convenience in maintenance and overhaul, and the reliability of the system is improved by controlling the path end;

3. this application is through setting up spacing piece, protects the valve block, and the angle of bounceing of valve block when placing pressure too high surpasss elastic range, leads to the valve block to become invalid, has guaranteed the stability and the security of this application.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a side view of the platen of the present embodiment;

FIG. 3 is a schematic view illustrating a normal venting condition of the present embodiment;

fig. 4 is a schematic diagram of the overvoltage protection state of the embodiment.

In the figure: 1-pressure plate, 2-limiting plate, 3-air discharge valve plate, 4-spring, 5-pressure discharge valve plate, 6-fixing bolt, 7-air discharge hole and 8-pressure discharge hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, 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.

Referring to fig. 1-4, in an embodiment of the present invention, a compressor protection device includes a pressure plate 1, the pressure plate 1 is provided with an exhaust hole 7 and a pressure relief hole 8, the exhaust hole 7 is communicated with a high pressure air cavity of a compressor and is used for exhausting high pressure air in the compressor, the pressure relief hole 8 is located at one side of the exhaust hole 7, the pressure relief hole 8 is communicated with a low pressure air inlet cavity of the compressor, and the pressure plate 1 is connected with a valve plate mechanism for opening and closing the exhaust hole 7 and the pressure relief hole 8;

the valve plate mechanism comprises an exhaust valve plate 3 and a pressure relief valve plate 5, wherein the exhaust valve plate 3 and the pressure relief valve plate 5 are elastic metal plates in the application, one end of the exhaust valve plate 3 and one end of the pressure relief valve plate 5 are fixedly connected with a pressure plate 1 through a fixing bolt 6, a pressure relief hole 8 is arranged between the exhaust hole 7 and the fixing bolt 6, one end of the exhaust valve plate 3 far away from the fixing bolt 6 is pressed on the exhaust hole 7, one end of the pressure relief valve plate 5 far away from the fixing bolt 6 is pressed on the pressure relief hole 8, in the embodiment, the length of the exhaust valve plate 3 is larger than that of the pressure relief valve plate 5, meanwhile, the top end of the pressure relief valve plate 5 is far away from the exhaust hole 7, the pressure relief valve plate 5 is arranged between the exhaust valve plate 3 and the pressure plate 1, a spring 4 is connected between the exhaust valve plate 3 and the pressure relief valve plate 5, two, spacing piece 2 is located the vent valve piece 3 outside, spacing piece 2 is by the one end that is close to pressure disk 1 to the one end perk gradually of keeping away from pressure disk 1, and then form between spacing piece 2 and pressure disk 1 and be used for holding vent valve piece 3, the space that pressure release valve piece 5 bounced, can also be through spacing piece 2 to vent valve piece 3 simultaneously, the bounced range of pressure release valve piece 5 limits, prevent vent valve piece 3, the bounced range of pressure release valve piece 5 exceeds its self elastic range, guarantee vent valve piece 3, the stability of pressure release valve piece 5.

The utility model discloses when using, in the course of the work of compressor, when the pressure in the high-pressure air cavity in the compressor is in the safe value within range of settlement, the compressor normally exhausts, as shown in fig. 3, because exhaust hole 7 communicates with the high-pressure air cavity of compressor, therefore when the high-pressure air cavity internal pressure of compressor risees, can produce the pressure difference with the outside air, and then produce the pressure difference in the both sides of exhaust valve piece 3, lead to 3 boxes of exhaust valve piece to keep away from the direction bounce of gas vent 7, and then open exhaust hole 7, high-pressure gas through the compressor high-pressure air cavity exhausts, is in normal pressure operating condition this moment; when the pressure in the high pressure gas cavity in the compressor is higher than the set threshold, as shown in fig. 4, the pressure difference between the two sides of the air release valve plate 3 is increased, so that the bounce angle of the air release valve plate 3 is increased, the opening amplitude of the air release valve plate 3 is increased at any time, the spring 4 is extended and generates pulling force, under the action of the pulling force of the spring 4, the air release valve plate 5 bounces away from the air release hole 8, so that the air release hole 8 is opened, because the air release hole 8 is communicated with the low pressure gas inlet cavity of the compressor, so that a negative pressure environment is generated near the air release hole 8, because the air release hole 8 is close to the air vent hole 7, a larger pressure difference is generated between the air vent hole 7 and the air release hole 8, under the action of the pressure, the gas flow velocity in the air vent hole 7 is increased, a part of the gas is discharged to the environment around the air vent hole 7, because the pipe diameter of exhaust hole 7 is unchangeable, and then the flow of the exhaust hole 7 of very big increase for the pressure of the compressor high-pressure cavity with exhaust hole 7 intercommunication can descend fast, until the pressure in the compressor high-pressure cavity is less than the safety threshold of settlement, the pressure difference of exhaust hole 7 and external world reduces this moment, the angle amplitude of bounceing of discharge valve piece 3 reduces, and then leads to spring 4 to shrink, and pressure release valve piece 5 resets, and pressure release hole 8 is closed, and safety device resumes normal operating condition.

In addition, this application can also adjust different safety threshold through the discharge valve piece, the pressure release valve piece, the spring of changing different specifications.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A compressor protection device comprises a pressure plate (1) and an exhaust hole (7) formed in the pressure plate (1), and is characterized in that a pressure relief hole (8) is formed in the pressure plate (1), the pressure relief hole (8) is located on one side of the exhaust hole (7), and a valve plate mechanism for opening and closing the exhaust hole (7) and the pressure relief hole (8) is arranged on the pressure plate (1);

valve block mechanism includes discharge valve piece (3) and pressure release valve piece (5), the one end of discharge valve piece (3), pressure release valve piece (5) with pressure disk (1) fixed connection, the other end crimping of discharge valve piece (3) in the outside of exhaust hole (7), the other end crimping of pressure release valve piece (5) is in the outside of pressure release hole (8), pressure release valve piece (5) are located between discharge valve piece (3) and pressure disk (1), pressure release valve piece (5) with be connected with spring (4) between discharge valve piece (3).

2. A compressor protection device according to claim 1, characterized in that said bleed hole (7) communicates with the high-pressure air chamber of the compressor and said bleed hole (8) communicates with the low-pressure inlet chamber of the compressor.

3. The compressor protection device according to claim 1, wherein a limiting piece (2) is arranged on the outer side of the discharge valve piece (3), and one end of the limiting piece (2) is fixedly connected with the pressure plate (1).

4. A compressor protection device according to claim 3, characterized in that the other end of the limiting piece (2) is far away from the pressure plate (1) to form a space for accommodating the bounce of the discharge valve piece (3).

5. A compressor protection device according to claim 3, characterized in that one end of the limiting plate (2), the air discharge valve plate (3) and the pressure discharge valve plate (5) is fixedly connected with the pressure plate (1) through a fixing bolt (6).

6. A compressor protection device according to claim 1, characterized in that the discharge valve plate (3) and the pressure relief valve plate (5) are elastic metal plates.

7. A compressor protection device according to claim 1, characterized in that the projection of the pressure relief valve plate (5) on the pressure plate (1) is away from the vent hole (7) and covers the vent hole (8).