CN220022048U - Frequency converter distribution room ventilation system - Google Patents

Abstract

The utility model discloses a ventilation system of a power distribution room of a frequency converter, which comprises a power distribution room body, a frequency conversion cabinet arranged in the power distribution room body and a transition room arranged at an inlet and an outlet of the power distribution room body, wherein a first airtight door is arranged on the front surface of the transition room, a second airtight door is arranged on the back surface of the transition room, a first filter assembly and a first exhaust device are respectively arranged on two side surfaces of the transition room, a plurality of second filter assemblies are arranged on the side wall of the power distribution room body, a plurality of third filter assemblies are arranged on the frequency conversion cabinet, an exhaust pipe is communicated with the top of the frequency conversion cabinet, and a second exhaust device is communicated with the outlet end of the exhaust pipe. According to the utility model, through the matched use of the first airtight door, the second airtight door, the first filtering component and the first exhaust device, the phenomenon that the air containing dust and other impurities outside invades the inside of the distribution room body when workers frequently enter and exit the inside of the distribution room body to influence the heat dissipation and ventilation effects of the frequency converter is avoided; outside air is subjected to circulating air cooling after being subjected to double filtration by the second filtering component and the third filtering component, so that the heat dissipation effect is effectively improved.

Description

Frequency converter distribution room ventilation system

Technical Field

The utility model relates to the technical field of ventilation of distribution rooms, in particular to a ventilation system of a frequency converter distribution room.

Background

In the existing aluminum ore production process, a frequency conversion control diaphragm pump is generally required to convey tailings to a tailing pond, so that a matched frequency conversion power distribution room is required to be built, a high-voltage frequency converter adopted by the diaphragm pump is large in heating value, and at present, external circulation air cooling and cooling measures with higher economical efficiency are adopted, so that the room temperature can be ensured to be normal, but because the field working environment of an aluminum ore production enterprise is poor, when workers frequently enter and exit the frequency conversion power distribution room, impurities such as dust in external cold air invade the frequency conversion power distribution room from a door of the frequency conversion power distribution room, and air pollution in the frequency conversion power distribution room is easy to cause, and heat dissipation is influenced; in addition, impurities such as dust in the external cold air can flow into the room along the window of the frequency conversion power distribution room, and the impurities are filtered by the filter screen on the frequency conversion cabinet, so that the frequency conversion power distribution room is often blocked in a short time, the electronic module in the frequency converter can be polluted by dust, the ventilation failure occurs, the normal production is influenced, and the clean labor intensity of staff is increased.

The utility model discloses a frequency conversion electricity distribution room building of China patent CN216076906U, including the electricity distribution room body, the access & exit department of electricity distribution room body is equipped with the door pocket, and the door pocket has outer door and the inner door of relative setting, is equipped with first shutter on the door body of outer door, is equipped with first filter screen on the door body of inner door. This patent adds the door through crossing at frequency conversion electricity distribution room access & exit, can play the effect of cutting off and buffering to outside sand and dust to set up first shutter on the outer door of door, set up first filter screen on the inner door of door, can increase the inside ventilation volume of electricity distribution room body, but when the staff on duty opens outer door and gets into the door, still have impurity-containing air and get into in the door, then invade the inside of electricity distribution room body when opening the inner door, cause frequency conversion electricity distribution room air pollution, influence the heat dissipation.

The foregoing background is only for the purpose of facilitating an understanding of the principles and concepts of the utility model and is not necessarily in the prior art to the present application and is not intended to be used as an admission that such background is not entitled to antedate such novelty and creativity by virtue of prior utility model or that it is already disclosed at the date of filing of this application.

Disclosure of Invention

The utility model aims to overcome the defects of the background technology and provide a ventilation system of a power distribution room of a frequency converter.

In order to achieve the above purpose, the ventilation system for the frequency converter distribution room provided by the utility model comprises a distribution room body, a frequency conversion cabinet arranged in the distribution room body and a transition room arranged at an inlet and an outlet of the distribution room body, wherein a first airtight door is arranged on the front surface of the transition room, a second airtight door is arranged on the back surface of the transition room, a first filter assembly and a first exhaust device are respectively arranged on two opposite side surfaces of the transition room, a plurality of second filter assemblies are arranged on the side wall of the distribution room body, a plurality of third filter assemblies are arranged on the frequency conversion cabinet, an exhaust pipe is communicated with the top of the frequency conversion cabinet, and a second exhaust device is communicated with the outlet end of the exhaust pipe. When a worker needs to enter the power distribution room body, the worker firstly enters the transition room, the transition room extracts polluted air which is invaded from the outside when the first airtight door is opened, the polluted air is changed into air which is filtered by the first filtering component, and then the air enters the power distribution room body through the second airtight door, so that the air which contains dust impurities and the like from the outside is effectively prevented from invading the power distribution room body, and the ventilation and heat dissipation of the frequency converter are easy to be poor; the first filtering component is used for filtering air entering the transition chamber from the outside, and the first exhaust device is used for exhausting air containing impurities in the transition chamber; the second filtering component is used for filtering air entering the power distribution room body from the outside, the third filtering component is used for filtering air entering the frequency conversion cabinet from the inside of the power distribution room body, external cold air passes through the second filtering component and the third filtering component are subjected to double filtration and then enter the frequency conversion cabinet to cool the frequency converter in an air-cooled manner, and hot air passes through the exhaust pipe and the second exhaust device is exhausted out of the room, so that air-cooled heat dissipation of the frequency converter is realized.

Further, the first filtering component, the second filtering component and the third filtering component comprise fixed frames, filtering cotton and pressing frames, the fixed frames are respectively and correspondingly arranged on the side face of the transition chamber, the side wall of the distribution chamber body and the cabinet body of the variable frequency cabinet, and the filtering cotton is pressed and fixedly installed in the fixed frames through the pressing frames. When the filter cotton is installed, the filter cotton is covered on the fixed frame, and the periphery of the filter cotton is compressed by using the compression frame.

Further, the first filtering component, the second filtering component and the third filtering component further comprise a mounting frame, a mesh area is arranged in the middle of the mounting frame, a raised positioning frame is arranged around the mesh area, the filtering cotton covers the mesh area and is pressed and fixed through the cooperation of the pressing frame and the positioning frame, and the mounting frame is mounted in the fixing frame. The filter cotton is fixedly installed on the installation frame, and then the installation frame is integrally installed on the fixed frame, so that the filter cotton is convenient to replace.

Further, a step surface is formed on the inner side of the fixed frame, and the step surface size corresponds to the size of the mounting frame, so that the mounting frame can be stably mounted in the fixed frame. During installation, the outer fringe card of installing frame is in the step face for the installing frame can't reciprocate, control and remove, ensures stability.

Further, a sealing groove is formed in the step surface, and a sealing ring is arranged in the sealing groove. The sealing ring is arranged to improve the tightness of the distribution room body, so that external air is prevented from directly entering the inside of the distribution room body without being filtered.

Further, the fixing frame and the pressing frame are respectively provided with a clamping piece, and the mounting frame is provided with a clamping hook matched with the clamping pieces. The clamping piece is matched with the clamping hook, the mounting frame can be fixedly clamped in the fixing frame for quick mounting, and the working efficiency is improved.

Further, the chucking spare includes pivot, swivel, bayonet lock and handle, pivot one end is fixed the fixed frame or compress tightly on the frame, the swivel cover is established the pivot, the bayonet lock with the handle is fixed respectively on the outer periphery of swivel, so that when driving through the handle the swivel rotates, the bayonet lock rotates simultaneously and blocks in the trip. During installation, the handle is held to rotate, so that the clamping pin is simultaneously rotated and clamped into the clamping hook to be fixed, and operation is convenient.

Further, the bottom end of the rotating shaft is provided with a threaded section, the lower section of the rotating shaft is sleeved with a spring, two ends of the spring are respectively provided with a baffle ring, the threaded section is connected with a nut in a threaded manner, and the bottom surface of the rotating ring is in butt joint with the baffle rings. The tightness of the clamping pin after being rotationally clamped into the clamping hook is conveniently adjusted by rotating the nut.

Further, the clamping end of the clamping pin is provided with a first excessive arc, the clamping hook is of an L-shaped structure, the clamping end of the clamping hook is provided with a second excessive arc, and a positioning notch is connected to the rear of the second excessive arc. The arrangement of the excessive arc facilitates the cooperation of the clamping pin and the clamping hook, and the positioning notch is used for positioning after the clamping pin is clamped in, so that the loosening is prevented.

Further, the first airtight door with the second airtight door top all is equipped with infrared inductor, be equipped with bee calling organ on the transition room side wall, the inside temperature sensor and the differential pressure sensor of being equipped with of electricity distribution room body, infrared inductor temperature sensor differential pressure sensor buzzer first airtight door the second airtight door first exhaust device and the second exhaust device all are connected with the control unit electricity. The control unit is arranged to promote the automation degree of the whole ventilation system.

The beneficial effects of the utility model include: through the cooperation of the first airtight door, the second airtight door, the first filtering component and the first exhaust device which are arranged on the transition chamber, the phenomenon that the air containing dust impurities outside is invaded into the power distribution chamber body when workers frequently enter and exit the power distribution chamber body is avoided, and the heat dissipation and ventilation effects of a frequency converter in the frequency conversion cabinet are affected; through adopting second filter component and third filter component to external cold air reentrant after carrying out double filtration in the frequency conversion cabinet carries out the forced air cooling to the converter, effectively avoids impurity such as dust in the air to pollute the inside electronic component of converter, influences equipment heat dispersion.

Drawings

Fig. 1 is a schematic view of a power distribution room body in an embodiment of the utility model.

FIG. 2 is a schematic view of a transition chamber in an embodiment of the utility model.

Fig. 3 is an exploded view of a filter assembly in an embodiment of the utility model.

Fig. 4 is an exploded view of a clip in an embodiment of the present utility model.

Fig. 5 is a schematic view of a hook according to an embodiment of the utility model.

Fig. 6 is a system block diagram of an embodiment of the present utility model.

Reference numerals: 1, a distribution room body; a second filter assembly 101; 102 fixing a frame; 103, filtering cotton; 104, compacting the frame; 105 mounting frames; 106 clamping pieces; 1061 axis of rotation; 1062 swivel; 1063 bayonet lock; 10631 a first transition arc; 1064 handle; 1065 thread segments; 1066 spring; 1067 stop ring; 1068 nuts; 107 hooks; 1071 a second transition arc; 1072 notch; 2, a frequency conversion cabinet; 201 a third filter assembly; 202 exhaust pipes; 203 a second exhaust device; 3, a transition chamber; 301 a first valve; 302 a second airtight door; 303 a first filter assembly; 304 a first exhaust means; an infrared sensor; 5 a buzzer; 6, a temperature sensor; 7, a differential pressure sensor; 8 a control unit; 9 windows.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the embodiments of the present utility model more clear, the present utility model is further described in detail below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for both the fixing action and the circuit communication action.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing embodiments of the utility model and to simplify the description by referring to the figures, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 6, in an embodiment, the ventilation system for a power distribution room of a frequency converter disclosed in the disclosure includes a power distribution room body 1, a frequency conversion cabinet 2 disposed in the power distribution room body 1, and a transition room 3 disposed at an entrance of the power distribution room body 1, wherein a first airtight door 301 is disposed on a front surface of the transition room 3, a second airtight door 302 is disposed on a back surface of the transition room 3, the first airtight door 301 and the second airtight door 302 are disposed oppositely, the first airtight door 301 is used for a worker to enter and exit the transition room 3, the second airtight door 302 is used for a worker to enter and exit the power distribution room body 1 from the transition room 3, a first filter assembly 303 and a first air exhaust device 304 are disposed on two opposite sides of the transition room 3, a plurality of second filter assemblies 101 are disposed on a side wall of the power distribution room body 1, a plurality of third filter assemblies 201 are disposed on the frequency conversion cabinet 2, an exhaust duct 202 is communicated at a top of the frequency conversion room 2, and an outlet end of the exhaust duct 202 is communicated with a second air exhaust device 203. Specifically, the two side surfaces of the transition chamber 3 are respectively provided with a vent (not shown) communicated with the interior of the transition chamber 3, the first filter assembly 303 and the first exhaust device 304 are respectively arranged on the vent, and the side wall of the distribution chamber body 1 and the cabinet body of the variable frequency cabinet 2 are also provided with vents, of course, the vent of the side wall of the distribution chamber body 1 can be an originally reserved window position, meanwhile, in order to conveniently observe the interior of the distribution chamber body 1 from the outside, the side wall of the distribution chamber body 1 is provided with a window 9, the second filter assembly 101 and the third filter assembly 201 are respectively arranged on the vent, the first filter assembly 303 is used for filtering air entering the interior of the transition chamber 3 from the outside, and the first exhaust device 304 is used for exhausting air containing impurities in the transition chamber 3 out of the transition chamber 3, so that the air containing dust impurities from the outside invades the interior of the distribution chamber body 1 when a worker enters and exits the interior of the distribution chamber body 1, and influences the heat dissipation effect of the variable frequency cabinet 2; the second filter assembly 101 is used for filtering air entering the power distribution room body 1 from the outside, the third filter assembly 201 is used for filtering air entering the frequency conversion cabinet 2 from the power distribution room body 1, the outside cold air enters the frequency conversion cabinet 2 to wind the frequency converter after being filtered by the second filter assembly 10 and the third filter assembly 201, and the hot air is discharged out of the room through the exhaust pipe 202 and the second exhaust device 203; in this embodiment, the second filter assembly 101 is disposed on the side wall far away from the second exhaust device 203, the third filter assembly 201 is disposed at the bottom of the frequency conversion cabinet 2, and the circulated air-cooled fresh air is filtered twice, so as to avoid dust pollution to the frequency converter inside the frequency conversion cabinet 2, influence heat dissipation thereof, cause equipment failure, effectively prolong the cleaning and maintenance period of the frequency conversion cabinet 2 and internal electric appliances, and reduce labor cost.

The first filtering component 303, the second filtering component 101 and the third filtering component 201 comprise a fixing frame 102, filtering cotton 103 and a pressing frame 104, wherein the fixing frame 102 is respectively and correspondingly arranged on the side surface of the transition chamber 3, the side wall of the power distribution chamber body 1 and the cabinet body of the frequency conversion cabinet 2, and the filtering cotton 103 is pressed and fixedly installed in the fixing frame 102 through the pressing frame 104. Specifically, the fixing frame 102 is installed on the vent, and the filter cotton 103 covers the fixing frame 102 and presses the periphery of the filter cotton 103 with the pressing frame 104.

The first filter assembly 303, the second filter assembly 101 and the third filter assembly 201 further comprise a mounting frame 105, a mesh area 1051 is arranged in the middle of the mounting frame 105, a raised positioning frame 1052 is arranged around the mesh area 1051, the filter cotton 103 is covered on the mesh area 1051 and is pressed and fixed through the cooperation of the pressing frame 104 and the positioning frame 1052, and then the mounting frame 105 is mounted in the fixing frame 102. The filter cotton 103 is easily replaced by fixing the filter cotton 103 to the mounting frame 105 and then mounting the mounting frame 105 to the fixing frame 102.

A step surface 1021 is formed on the inner side of the fixed frame 102, and the step surface 1021 corresponds to the mounting frame 105 in size, so that the mounting frame 105 can be stably mounted in the fixed frame 102. The outer edge of the mounting frame 105 is clamped in the step surface 1021, so that the mounting frame 105 cannot move up and down, left and right, and keeps stable.

A seal groove 1022 is provided on the step surface 1021, and a seal ring 1023 is provided in the seal groove 1022. The sealing ring 1023 is used for sealing the gap between the mounting frame 105 and the fixing frame 102, so as to prevent outside air from directly passing through the air vent without being filtered.

The fixing frame 102 and the pressing frame 104 are respectively provided with a clamping piece 106, and the mounting frame 105 is provided with a clamping hook 107 matched with the clamping piece 106. The clamping member 106 and the hook 107 cooperate to fix and clamp the mounting frame 105 in the fixing frame 102 for quick mounting.

The clamping piece 106 comprises a rotating shaft 1061, a rotating ring 1062, a clamping pin 1063 and a handle 1064, one end of the rotating shaft 1061 is fixed on the fixed frame 102 or the pressing frame 104, the rotating ring 1062 is sleeved on the rotating shaft 1061, and the clamping pin 1063 and the handle 1064 are respectively fixed on the outer circumferential surface of the rotating ring 1062, so that when the rotating ring 1062 is driven to rotate by the handle 1064, the clamping pin 1063 is simultaneously rotated and clamped into the clamping hook 107. During installation, the handle 1064 rotates along the rotating shaft 1061, and the clamping pin 1063 rotates and clamps into the clamping hook 107 to fix the clamping hook, so that the clamping device is convenient and quick.

A threaded section 1065 is arranged at the bottom end of the rotating shaft 1061, a spring 1066 is sleeved at the lower section of the rotating shaft 1061, baffle rings 1067 are respectively arranged at two ends of the spring 1066, nuts 1068 are connected to the threaded section 1065 in a threaded mode, and the bottom surface of the rotating ring 1062 is abutted to the baffle rings 1067. Specifically, the bottom surface of the swivel 1062 abuts against the upper baffle ring 1067, the upper side of the nut 1068 abuts against the lower baffle ring 1067, and the nut 1068 is rotated to adjust the tightness of the bayonet 1063 after being rotatably clamped into the hook 107 up and down along the rotation shaft 1061.

The locking end of the locking pin 1063 is provided with a first excessive arc 10631, the locking hook 107 is in an inverted L-shaped structure, the locking end of the locking hook 107 is provided with a second excessive arc 1071, and a positioning notch 1072 is connected to the rear of the second excessive arc 1071. The first transition arc 10631 and the second transition arc 1071 facilitate the locking of the locking pin 1063 into the locking hook 107, and the positioning notch 1072 is used for positioning after the locking pin 1063 is locked, so as to prevent the locking.

An infrared sensor 4 is arranged above the first airtight door 301 and the second airtight door 302, a buzzer 5 is arranged on the side wall of the transition chamber 3, a temperature sensor 6 and a pressure difference sensor 7 are arranged inside the distribution chamber body 1, and the infrared sensor 4, the temperature sensor 6, the pressure difference sensor 7, the buzzer 5, the first airtight door 301, the second airtight door 302, the first air exhausting device 304 and the second air exhausting device 203 are all electrically connected with the control unit 8. The infrared sensor 4 is used for sensing whether a person is in front of the first airtight door 301 or the second airtight door 302, detecting a feedback signal to the control unit 8 after the person is in front of the door, the control unit 8 sends a control signal to the first airtight door 301 or the second airtight door 302 to be automatically opened, the temperature sensor 6 is used for detecting the internal temperature of the distribution room body 1, the pressure difference sensor 7 is used for detecting the pressure difference between the internal part of the distribution room body 1 and the outside, after the filter cotton 103 is blocked, the internal pressure difference and the temperature of the distribution room body 1 exceed preset thresholds, the feedback signal is sent to the control unit 8, and the control unit 8 sends a control signal to the buzzer 5 to remind timely replacement, so that the frequency converter is prevented from being stopped due to faults.

The working principle and the using flow of the utility model are as follows: when a worker needs to enter the power distribution room body 1 to carry out duty inspection, the infrared sensor 4 detects that the worker approaches, the worker enters the transition room 3 by opening the first air-tight door 301, after the first air-tight door 301 is closed, the first air exhaust device 304 is started to exhaust the unfiltered air entering the first air-tight door 301 when the first air-tight door 301 is opened, and then the second air-tight door 302 is opened, so that the worker can enter the power distribution room body 1, and the dust-containing air is effectively prevented from entering the power distribution room body 1 when the worker enters and exits, thereby affecting the ventilation and heat dissipation effects; simultaneously, the second air exhaust device 203 is continuously started, heat generated during the working of the frequency converter is extracted to the outside of the power distribution room body 1, and external air is filtered by the second filtering component 101 and the third filtering component 201 and then enters the inside of the frequency conversion cabinet 2, so that the circulating ventilation and heat dissipation are realized; when the filter cotton 103 on the first filter component 303, the second filter component 101 or the third filter component 201 needs to be replaced, the handle 1064 on the fixed frame 102 is rotated, the clamping pin 1063 is separated from the clamping hook 107, the whole mounting frame 105 is taken down, and then the handle 1064 on the pressing frame 104 is rotated to take down and replace the filter cotton 103, so that the filter cotton filter is convenient and quick.

The background section of the present utility model may contain background information about the problems or environments of the present utility model and is not necessarily descriptive of the prior art. Accordingly, inclusion in the background section is not an admission of prior art by the applicant.

The foregoing is a further detailed description of the utility model in connection with specific/preferred embodiments, and it is not intended that the utility model be limited to such description. It will be apparent to those skilled in the art that several alternatives or modifications can be made to the described embodiments without departing from the spirit of the utility model, and these alternatives or modifications should be considered to be within the scope of the utility model. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Those skilled in the art may combine and combine the features of the different embodiments or examples described in this specification and of the different embodiments or examples without contradiction. Although embodiments of the present utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the utility model as defined by the appended claims.

Claims (10)

1. A ventilation system for a power distribution room of a frequency converter, which is characterized in that: including the block terminal body, set up the inside frequency conversion cabinet of block terminal body and setting are in the transition room of block terminal body access & exit department, the transition room openly is equipped with first air tight door, the transition room back is equipped with the second air tight door, the relative both sides face of transition room is equipped with first filter element and first exhaust device respectively, the lateral wall of block terminal body is equipped with a plurality of second filter elements, be equipped with a plurality of third filter elements on the frequency conversion cabinet, frequency conversion cabinet top intercommunication has the exhaust pipe, the exhaust pipe exit end intercommunication has second exhaust device.

2. The frequency converter power distribution room ventilation system of claim 1, wherein: the first filter component, the second filter component and the third filter component comprise fixed frames, filter cotton and compression frames, the fixed frames are respectively and correspondingly arranged on the side face of the transition chamber, the side wall of the distribution chamber body and the cabinet body of the variable frequency cabinet, and the filter cotton is fixedly installed in the fixed frames through compression of the compression frames.

3. The frequency converter power distribution room ventilation system of claim 2, wherein: the first filter component, the second filter component and the third filter component further comprise a mounting frame, a mesh area is arranged in the middle of the mounting frame, a raised positioning frame is arranged around the mesh area, filter cotton covers the mesh area and is pressed and fixed through the cooperation of the pressing frame and the positioning frame, and the mounting frame is mounted in the fixing frame.

4. A transducer power distribution room ventilation system as claimed in claim 3, wherein: the step surface is arranged on the inner side of the fixed frame, and the size of the step surface corresponds to that of the mounting frame, so that the mounting frame can be stably mounted in the fixed frame.

5. The frequency converter power distribution room ventilation system of claim 4, wherein: and a sealing groove is formed in the step surface, and a sealing ring is arranged in the sealing groove.

6. The frequency converter power distribution room ventilation system of claim 5, wherein: the fixing frame and the pressing frame are respectively provided with a clamping piece, and the mounting frame is provided with a clamping hook matched with the clamping pieces.

7. The frequency converter power distribution room ventilation system of claim 6, wherein: the clamping piece comprises a rotating shaft, a rotating ring, a clamping pin and a handle, one end of the rotating shaft is fixed on the fixed frame or the compression frame, the rotating ring is sleeved on the rotating shaft, and the clamping pin and the handle are respectively fixed on the outer circumferential surface of the rotating ring, so that the clamping pin is simultaneously rotated and clamped into the clamping hook when the rotating ring is driven to rotate by the handle.

8. The frequency converter power distribution room ventilation system of claim 7, wherein: the rotary shaft bottom is provided with a thread section, a spring is sleeved at the lower section of the rotary shaft, baffle rings are respectively arranged at two ends of the spring, the thread section is connected with a nut in a threaded manner, and the bottom surface of the rotary ring is abutted to the baffle rings.

9. The frequency converter power distribution room ventilation system of claim 7, wherein: the clamping end of the clamping pin is provided with a first excessive arc, the clamping hook is of an L-shaped structure, the clamping end of the clamping hook is provided with a second excessive arc, and a positioning notch is connected to the rear of the second excessive arc.

10. The frequency converter power distribution room ventilation system of claim 1, wherein: the air-tight door comprises a power distribution room body, and is characterized in that infrared sensors are arranged above the first air-tight door and the second air-tight door, a buzzer is arranged on the side wall of the transition room, a temperature sensor and a pressure difference sensor are arranged inside the power distribution room body, and the infrared sensors, the temperature sensor, the pressure difference sensor, the buzzer, the first air-tight door, the second air-tight door, a first air exhaust device and a second air exhaust device are all electrically connected with a control unit.