Positive-pressure explosion-proof air supply device capable of rapidly purging

Abstract

The utility model provides a quick purging positive pressure explosion-proof air supply device which comprises a positive pressure cabinet and a pneumatic driving part, and the positive pressure cabinet is provided with an exhaust port and a purging air inlet; the pneumatic driving part is fixedly installed on the upper portion of the positive pressure cabinet, an output shaft of the pneumatic driving part penetrates through the positive pressure cabinet and extends into the positive pressure cabinet, the pneumatic driving part comprises a driving gas inlet and a driving gas outlet, a gas channel is formed in the axial direction of the output shaft of the pneumatic driving part, and the driving gas inlet is communicated with the driving gas outlet. The external port of the gas channel is the sweeping gas inlet; compressed gas enters the pneumatic driving part from the driving gas inlet to drive an output shaft of the pneumatic driving part to rotate, and the compressed gas enters the gas channel from the purging gas inlet so as to enter a positive pressure cavity of the positive pressure cabinet. According to the utility model, gas in the positive pressure cabinet can be quickly purged, equipment is allowed to be powered on within a very short time, and the preheating time of the equipment is shortened from 20 minutes to 5 minutes.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the positive pressure explosion -proof cabinet technical field especially relates to a kind of positive pressure explosion -proof gas supply device of quick purging. BACKGROUND

[0002] In the process of using positive pressure cabinet, there is positive pressure gas to the cabinet purging, before starting, the dangerous gas in the cabinet is completely replaced to allow the equipment to power on, but in the purging process, gas accumulated in the corner, it needs a long time to replace, such as a 150L volume cavity, purging time needs to be close to 20min. UTILITARY MODEL CONTENT

[0003] For the above technical problems, the utility model provides a kind of positive pressure explosion -proof gas supply device of quick purging, mainly solves the cabinet gas quick purging, reaches very short time to allow the equipment to power on, shortens the equipment preheating time, can be reduced to 5min from 20min.

[0004] To achieve the above object, the technical scheme of the utility model is as follows:

[0005] A kind of positive pressure explosion -proof gas supply device of quick purging, including positive pressure cabinet and pneumatic drive part, the exhaust port and purging gas entry are set on the positive pressure cabinet;

[0006] The pneumatic drive part is fixedly installed on the upper portion of the positive pressure cabinet, the output shaft of the pneumatic drive part passes through the positive pressure cabinet and extends into the positive pressure cabinet, the pneumatic drive part includes drive gas entry and drive gas outlet, gas passage is arranged along the axial direction of the output shaft of the pneumatic drive part, and the external port of the gas passage is the purging gas entry;

[0007] Compressed gas enters the pneumatic drive part from the drive gas entry, the output shaft of the pneumatic drive part rotates, compressed gas enters the gas passage from the purging gas entry, to enter the positive pressure cavity of the positive pressure cabinet.

[0008] Preferably, the output shaft end of the pneumatic drive part is provided with a plurality of blades.

[0009] Preferably, a plurality of gas outlets are arranged on the output shaft of the gas drive part inside the positive pressure cabinet.

[0010] Preferably, the drive gas outlet is communicated with the gas passage.

[0011] Preferably, the pneumatic drive part is a pneumatic motor.

[0012] Preferably, the exhaust port is arranged in the middle lower portion of the positive pressure cabinet.

[0013] The utility model discloses a kind of quick blowing positive pressure explosion-proof gas supply devices, comprising positive pressure cabinet and pneumatic drive part, the positive pressure cabinet is provided with exhaust port and purge gas inlet, and the pneumatic drive part is arranged on the upper portion of the positive pressure cabinet.

[0014] The present application is provided with a pneumatic drive part on the upper portion of the positive pressure cabinet, which is driven by gas and rotates. The compressed gas enters the pneumatic drive part through the drive gas inlet, and the output shaft of the pneumatic drive part rotates. The compressed gas then flows out of the pneumatic drive part through the drive gas outlet. The compressed gas enters the positive pressure chamber of the positive pressure cabinet through the gas passage from the purge gas inlet. Since the gas passage is arranged along the output shaft of the pneumatic drive part, the compressed gas is spirally input into the positive pressure chamber along with the rotating output shaft. According to the principle of air dynamics, the compressed air and the dangerous gas inside the positive pressure cabinet are quickly mixed and then discharged from the exhaust port. This can quickly remove the dangerous gas from the dead corners of the positive pressure chamber, achieving the purpose of quick purging. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The utility model discloses a kind of quick blowing positive pressure explosion-proof gas supply devices, comprising positive pressure cabinet and pneumatic drive part, the positive pressure cabinet is provided with exhaust port and purge gas inlet, and the pneumatic drive part is arranged on the upper portion of the positive pressure cabinet.

[0016] Reference signs: 1-drive gas outlet; 2-purge gas inlet; 3-drive gas inlet; 4-pneumatic drive part; 5-vane; 6-positive pressure cabinet; 7-exhaust port. DETAILED DESCRIPTION

[0017] Explanation of terms: positive pressure purging: a technology that prevents the inflow of flammable gas from the outside into the cabinet to cause explosion by keeping the air pressure inside the cabinet higher than that outside.

[0018] During the use of the positive pressure cabinet, the cabinet needs to be purged by positive pressure gas. The dangerous gas inside the cabinet needs to be completely replaced before the equipment is powered on. In the prior art, the gas pipe is usually connected to the top or bottom of the cabinet body, and the cabinet is purged for a long time to achieve the replacement of dangerous gas. However, this method has the disadvantage of long replacement time. For example, for a 150L volume chamber, the purging time needs to be close to 20 minutes.

[0019] The present application mainly solves the problem of quick purging of the gas inside the cabinet, allowing the equipment to be powered on in a very short time, shortening the preheating time of the equipment, and reducing the purging time from 20 minutes to 5 minutes.

[0020] The utility model discloses a kind of quick blowing positive pressure explosion-proof gas supply devices, comprising positive pressure cabinet and pneumatic drive part, the positive pressure cabinet is provided with exhaust port and purge gas inlet, and the pneumatic drive part is arranged on the upper portion of the positive pressure cabinet.

[0021] Reference Figure 1 A kind of quick blowing positive pressure explosion-proof gas supply devices, comprising positive pressure cabinet and pneumatic drive part, the positive pressure cabinet is provided with exhaust port and purge gas inlet, and the pneumatic drive part is arranged on the upper portion of the positive pressure cabinet.

[0022] The pneumatic driving part 4 is fixedly installed on the upper portion of the positive pressure cabinet 6, the output shaft of the pneumatic driving part 4 penetrates through the positive pressure cabinet 6 and extends into the positive pressure cabinet 6, the pneumatic driving part 4 comprises a driving gas inlet 3 and a driving gas outlet 1, a gas passage is arranged along the axial direction of the output shaft of the pneumatic driving part 4, and the external port of the gas passage is the purge gas inlet 2;

[0023] The compressed gas enters the pneumatic driving part 4 through the driving gas inlet 3, the output shaft of the pneumatic driving part 4 rotates, the compressed gas enters the gas passage through the purge gas inlet 2, and then enters the positive pressure cavity of the positive pressure cabinet 6.

[0024] The pneumatic driving part 4 is arranged on the upper portion of the positive pressure cabinet 6, the driving part is driven to rotate by gas, the compressed gas enters the pneumatic driving part 4 through the driving gas inlet 3, the output shaft of the pneumatic driving part 4 rotates, the compressed gas flows out of the pneumatic driving part through the driving gas outlet 1, the compressed gas enters the positive pressure cavity of the positive pressure cabinet 6 through the purge gas inlet 2 and the gas passage, since the gas passage is arranged along the axial direction of the output shaft of the pneumatic driving part 4, the compressed gas is spirally input into the positive pressure cavity along with the rotating output shaft, according to the principle of air dynamics, the compressed air is quickly mixed with the dangerous gas in the positive pressure cabinet 6, and then is discharged from the exhaust port 7, so that the dangerous gas in each dead angle can be quickly taken out of the positive pressure cavity, and the purpose of rapid purging is achieved.

[0025] The gas that can be used as the purge gas is usually air or inert gas, and the source of the gas of the pneumatic driving part 4 can be compressed air or compressed inert gas.

[0026] Further, a plurality of blades 5 are installed at the end of the output shaft of the pneumatic driving part 4, for quickly mixing the gas in the positive pressure cavity.

[0027] Preferably, a plurality of gas outlets are arranged on the output shaft of the gas driving part in the positive pressure cabinet 6.

[0028] Preferably, the driving gas outlet 1 is in communication with the gas passage, that is, the purge gas inlet 2 is in communication with the driving gas outlet 1, the compressed gas flowing out of the pneumatic driving part 4 directly enters the positive pressure cavity in the positive pressure cabinet 6 through the gas passage, so that only one driving gas inlet 3 is needed, and the functions of the pneumatic driving part 4 and the positive pressure purging are achieved.

[0029] Preferably, the pneumatic driving part 4 is a pneumatic motor, which is driven to rotate by gas, and has no electrical components, so that the explosion-proof purpose is achieved.

[0030] Preferably, the exhaust port 7 is arranged at the middle lower portion of the positive pressure cabinet 6.

[0031] The compressed gas enters the pneumatic driving part 4 from the driving gas inlet 3, the output shaft of the pneumatic driving part 4 rotates, the compressed gas then flows out of the gas driving part from the driving gas outlet 1, and then enters the gas channel through the purge gas inlet 2, so as to enter the positive pressure cavity of the positive pressure cabinet 6. Since the gas channel is arranged along the output shaft of the pneumatic driving part 4 in the axial direction, the compressed gas is spirally input into the positive pressure cavity along with the rotating output shaft. Since a rotating gas flow is blown out from the output shaft in the positive pressure cavity, and the gas in the positive pressure cavity is quickly mixed by the rotating blade 5, according to the principle of air dynamics, the compressed air is quickly mixed with the dangerous gas in the positive pressure cabinet 6, and then is discharged from the exhaust port 7. The dangerous gas in each dead angle can be quickly taken out of the positive pressure cavity, so that the purpose of quick purging is achieved. For example, a 150L volume cavity can reduce the purging time from 20min to 5min, so that the equipment is allowed to be powered on in a very short time, and the preheating time of the equipment is shortened.

[0032] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments. Even if various changes are made to the utility model, provided that the changes belong to the scope of the utility model claims and equivalent technologies, the changes still fall within the protection scope of the utility model.

Claims

1. A fast purging, positive pressure, explosion-proof gas supply device, characterized by, The positive pressure cabinet is provided with an exhaust port and a purge gas inlet; The pneumatic driving part is fixedly installed on the upper part of the positive pressure cabinet, the output shaft of the pneumatic driving part penetrates through the positive pressure cabinet and extends into the positive pressure cabinet, the pneumatic driving part comprises a driving gas inlet and a driving gas outlet, a gas passage is arranged along the axial direction of the output shaft of the pneumatic driving part, and the external port of the gas passage is the purge gas inlet; Compressed gas enters the pneumatic driving part through the driving gas inlet, the output shaft of the pneumatic driving part rotates, compressed gas enters the gas passage through the purge gas inlet, and then enters the positive pressure cavity of the positive pressure cabinet.

2. The quick-purge, positive pressure, explosion-proof gas supply of claim 1, wherein, A plurality of blades are installed at the end of the output shaft of the pneumatic driving part.

3. A quick-purge, positive pressure, explosion-proof gas supply device according to claim 1 or 2, characterised in that, A plurality of gas outlets are arranged on the output shaft of the pneumatic driving part inside the positive pressure cabinet.

4. The quick-purge, positive-pressure, explosion-proof gas supply device of claim 1, wherein, The driving gas outlet is in communication with the gas passage.

5. The quick-purge, positive pressure, explosion-proof gas delivery device of claim 1, wherein, The pneumatic driving part is a pneumatic motor.

6. The quick-purge, positive pressure, explosion-proof gas delivery device of claim 1, wherein, The exhaust port is arranged in the middle and lower part of the positive pressure cabinet.

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