Ventilation system with bypass compensation structure

By designing a switching mechanism between the main gas path and the compensation gas path, the safety problem of the motor operating in an explosive gas environment is solved, ensuring a continuous positive pressure airflow inside the motor housing to avoid explosion, and still supplying gas normally in the event of a fault, thereby improving the reliability and safety of the system.

CN223957404UActive Publication Date: 2026-02-27无锡气动技术研究所有限公司
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Patent Information

Application Number
CN202520250619.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-18
Publication Date
2026-02-27
Estimated Expiration
2035-02-18

AI Technical Summary

Technical Problem

In existing technologies, when an electric motor operates in an explosive gas environment, it is prone to generating sparks that come into contact with the explosive gas, which can easily lead to an explosion. Furthermore, when the ventilation system fails, the motor casing cannot be continuously supplied with gas, posing a safety hazard.

Method used

The design incorporates a ventilation system with a bypass compensation structure, including a main air path and a compensation air path. The main air path and the compensation air path can switch between each other to ensure a continuous positive pressure airflow inside the motor housing, preventing the entry of explosive gases. In the event of a failure in the main air path, the compensation air path will supply air, thus enabling the switching of gas flow rates and adapting to different environmental requirements.

Benefits of technology

This effectively prevents the entry of explosive gases into the motor housing, ensuring the safe operation of the motor, and allows for continuous gas supply even in the event of a main gas circuit failure, thus improving the reliability and safety of the system.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a ventilation system with a bypass compensation structure. The ventilation system comprises a box body, a bottom plate installed in the box body and a main road branch arranged on the bottom plate. The main gas path comprises a compensation shaft valve, a switch ball valve, a gas path distributor and a filter which are connected in sequence and mounted on the bottom plate; the compensation gas circuit comprises a one-way valve communicated with the compensation shaft valve and a pressure reducing valve, one end of the pressure reducing valve is communicated with the gas circuit distributor, the other end of the pressure reducing valve is communicated with the one-way valve, and the one-way valve and the pressure reducing valve are installed on the bottom plate; the far ends of the compensation shaft valve and the filter are respectively communicated with a main trunk pipeline air outlet and a main trunk pipeline air inlet; according to the utility model, the main gas circuit and the compensation gas circuit are designed to supply gas to the motor shell, so that continuous positive pressure gas flow is ensured in the motor shell, and explosive gas is prevented from entering the motor shell and being easily contacted with sparks and exploding due to friction when the explosive gas runs with the motor.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the field of gas compensation, and specifically relates to a ventilation system with bypass compensation structure. BACKGROUND

[0002] Friction can easily produce sparks when the motor is running, and the motor is in the occasion where there is explosive gas, when the explosive gas enters the click shell, forms a certain concentration, and the motor runs due to friction, which can easily produce sparks and contact with explosive gas, which can easily explode;

[0003] Therefore, it is necessary to ensure that no explosive gas enters the motor, and for this purpose, clean air higher than the external air pressure is continuously filled into the motor to prevent explosive gas from entering the motor;

[0004] Therefore, a ventilation system is needed to continuously aerate the motor shell, so that the motor shell has a continuous positive pressure airflow, and explosive gas is prevented from entering the motor shell and contacting the sparks produced by friction when the motor is running. INVENTION CONTENTS

[0005] The utility model discloses a ventilation system with bypass compensation structure, which solves the above problems in the prior art.

[0006] Technical scheme: a ventilation system with bypass compensation structure, comprising:

[0007] A box body, a bottom plate installed in the box body, and a main trunk branch provided on the bottom plate;

[0008] The main trunk branch comprises:

[0009] A main gas path comprising a compensation shaft valve, an on-off ball valve, a gas path distributor and a filter connected in sequence and installed on the bottom plate;

[0010] A compensation gas path comprising a one-way valve in communication with the compensation shaft valve, and a pressure reducing valve having one end in communication with the gas path distributor and the other end in communication with the one-way valve, wherein the one-way valve and the pressure reducing valve are installed on the bottom plate;

[0011] The compensation shaft valve and the filter have a main trunk gas outlet and a main trunk gas inlet in communication with the distal ends thereof, respectively;

[0012] The utility model discloses a main gas path and a compensation gas path, which supply air to the motor shell, so that the motor shell has a continuous positive pressure airflow, and explosive gas is prevented from entering the motor shell and contacting the sparks produced by friction when the motor is running.

[0013] Meanwhile, the application designs two groups of air paths, i.e. a main air path and a compensation air path. When the main air path is disconnected, the compensation air path supplies air. The two groups of air supply branches work together to avoid the situation that the motor shell cannot be continuously supplied with air when the main air path fails.

[0014] When the main air path and the compensation air path are switched, the flow of the gas can be switched, and then the appropriate air path can be selected according to the on-site environment, and then the appropriate input flow of the gas can be achieved.

[0015] In a further embodiment, the compensation valve comprises an upper end cover, a lower end cover, and a valve body arranged between the upper end cover and the lower end cover.

[0016] In a further embodiment, the valve body comprises:

[0017] A valve body ring shell is arranged between the upper end cover and the lower end cover, and a first air port and a second air port are opened on the side of the valve body ring shell.

[0018] A piston is arranged in the ring shell and extends into the upper end cover and the lower end cover, and slides along the inner wall of the upper end cover and the lower end cover. A push ring adapted to the valve body ring shell is arranged on the piston.

[0019] In a further embodiment, the upper end cover and the lower end cover have a predetermined distance therebetween.

[0020] The valve body ring shell connects the upper end cover and the lower end cover, and forms an air cavity with the upper end cover and the lower end cover.

[0021] The push ring is adapted to the air cavity and located within the predetermined distance between the upper end cover and the lower end cover.

[0022] The first air port extends to one end of the air cavity, and the second air port extends to the other end of the air cavity.

[0023] In a further embodiment, a spring is arranged between the push ring and the lower end cover.

[0024] In a further embodiment, a valve core abutting against the piston is arranged in the lower end cover, and a compensation air passage is opened on the side of the lower end cover.

[0025] A sealing ring is arranged on the valve core, a plurality of exhaust ports are opened on the periphery of the valve core, and an exhaust passage is opened on the bottom of the valve core and communicates with the plurality of exhaust ports.

[0026] The sealing ring is located above the plurality of exhaust ports and abuts against the piston.

[0027] When the valve core is separated from the piston, the air inlet passage and the exhaust port are communicated.

[0028] When the valve core abuts against the piston, the air inlet passage and the exhaust port are disconnected, and air is supplied by the compensation air passage at this time.

[0029] The compensation air channel is designed in the lower end cover, and the contact fit of the piston and the valve core is designed, when the valve core is separated from the piston, the air inlet channel and the air outlet are communicated, when the valve core abuts against the piston, the air inlet channel and the air outlet are disconnected, at this time, the compensation air channel continuously supplies air, the bypass compensation connection function when the valve core is closed is realized, two groups of air supply branches are realized, the flow conversion of the output working port is realized, the two flow switching functions can be completed, and the demand of the air input of the bypass channel when the main channel is disconnected is also met.

[0030] In a further embodiment, the upper end cover and the piston are internally provided with an air inlet channel, and the lower end cover is internally provided with an air outlet channel;

[0031] The air outlet channel is communicated with the air outlet channel.

[0032] In a further embodiment, the air inlet channel is communicated with the on-off ball valve, the air outlet channel is communicated with the main channel air outlet, the main channel air outlet is externally connected with a motor shell, and the main channel air inlet is externally connected with an air source.

[0033] In a further embodiment, the compensation air channel is communicated with a one-way valve.

[0034] Beneficial effects: the utility model discloses a ventilation system with bypass compensation structure, the utility model discloses a main gas path and compensation gas path are designed, and the motor shell is supplied with air, so that the motor shell is ensured to have sustained positive pressure airflow, and the explosive gas is avoided to enter the motor shell, and the spark contact due to friction during motor operation is avoided, and explosion is avoided;

[0035] Meanwhile, the application designs two gas paths of the main gas path and the compensation gas path, when the main gas path is disconnected, air is supplied by the compensation gas path, and the two air supply branches work in cooperation, so that when the main gas path fails, the motor shell cannot be continuously supplied with air.

[0036] When the main gas path and the compensation gas path are switched, the flow switching of the gas can be completed, and then the appropriate gas path can be selected according to the on-site environment, and then the appropriate gas input flow is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is the structure schematic diagram of the utility model.

[0038] Figure 2 It is the main channel branch structure schematic diagram of the utility model.

[0039] Figure 3 It is the compensation shaft valve structure schematic diagram of the utility model.

[0040] The reference signs are:

[0041] 1, box body;

[0042] 2, trunk branch; 21, trunk outlet;

[0043] 22, compensation shaft valve; 221, upper end cover; 222A, valve body ring shell; 222B, spring; 222C, push ring; 222D, air cavity; 222E, first air port; 222F, second air port; 222G, piston;

[0044] 223, lower end cover; 223A, valve core; 223B, exhaust port; 223C, compensation air passage;

[0045] 23, on-off ball valve; 24, air path distributor; 25, filter; 26, trunk inlet; 27, pressure reducing valve; 28, check valve;

[0046] 3, bottom plate. DETAILED DESCRIPTION

[0047] The application relates to a ventilation system with a bypass compensation structure, which is explained in detail below through specific embodiments.

[0048] The ventilation system with the bypass compensation structure comprises:

[0049] a box body 1, a bottom plate 3 installed in the box body 1, and a trunk branch 2 arranged on the bottom plate 3;

[0050] The trunk branch 2 comprises:

[0051] a main air path comprising a compensation shaft valve 22, an on-off ball valve 23, an air path distributor 24 and a filter 25 which are sequentially connected and installed on the bottom plate 3;

[0052] a compensation air path comprising a check valve 28 communicated with the compensation shaft valve 22 and a pressure reducing valve 27 communicated at one end with the air path distributor 24 and at the other end with the check valve 28, wherein the check valve 28 and the pressure reducing valve 27 are installed on the bottom plate 3;

[0053] The compensation shaft valve 22 and the filter 25 are respectively communicated with a trunk outlet 21 and a trunk inlet 26;

[0054] The ventilation system with the bypass compensation structure has the advantages that the main air path and the compensation air path are designed, air supply to the motor shell is realized, and continuous positive pressure airflow in the motor shell is ensured, so that explosive gas cannot enter the motor shell and contact the motor to generate sparks due to friction during operation, and explosion is avoided.

[0055] Meanwhile, the main air path and the compensation air path are designed as two groups of air paths, air supply is realized by the compensation air path when the main air path is disconnected, and the two groups of air supply branches work cooperatively, so that the situation that the motor shell cannot be continuously supplied with air when the main air path is faulty is avoided.

[0056] When the main gas path and the compensation gas path are switched, the flow switching of the gas can be completed, and then the appropriate gas path can be selected according to the field environment, and then the appropriate gas input flow can be achieved.

[0057] The compensation shaft valve 22 comprises an upper end cover 221, a lower end cover 223, and a valve body arranged between the upper end cover 221 and the lower end cover 223.

[0058] The valve body comprises:

[0059] A valve body ring shell 222A is arranged between the upper end cover 221 and the lower end cover 223, and a first gas port 222E and a second gas port 222F are formed in the side of the valve body ring shell 222A;

[0060] A piston 222G is arranged in the ring shell and extends into the upper end cover 221 and the lower end cover 223, and slides along the inner wall of the upper end cover 221 and the lower end cover 223, and a push ring 222C adapted to the valve body ring shell 222A is sleeved on the piston 222G.

[0061] The upper end cover 221 and the lower end cover 223 have a predetermined distance therebetween;

[0062] The valve body ring shell 222A connects the upper end cover 221 and the lower end cover 223, and forms a gas cavity 222D with the upper end cover 221 and the lower end cover 223;

[0063] The push ring 222C is adapted to the gas cavity 222D and located within the predetermined distance between the upper end cover 221 and the lower end cover 223;

[0064] The first gas port 222E extends to one end of the gas cavity 222D, and the second gas port 222F extends to the other end of the gas cavity 222D.

[0065] A spring 222B is arranged between the push ring 222C and the lower end cover 223.

[0066] A valve core 223A abutting against the piston 222G is arranged in the lower end cover 223, and a compensation gas channel 223C is formed in the side of the lower end cover 223;

[0067] A sealing ring is arranged on the valve core 223A, a plurality of exhaust ports 223B are formed in the periphery of the valve core 223A, and an exhaust channel is formed in the bottom of the valve core 223A and communicated with the plurality of exhaust ports 223B;

[0068] The sealing ring is located above the plurality of exhaust ports 223B and abuts against the piston 222G;

[0069] When the valve core 223A is separated from the piston 222G, the air inlet channel and the exhaust port 223B are communicated;

[0070] When the valve core 223A is in abutment with the piston 222G, the intake passage and the exhaust port 223B are disconnected, and at this time, the compensation passage 223C supplies gas.

[0071] The compensation passage 223C is designed in the lower end shell, and the piston 222G and the valve core 223A are designed to be in contact and fit. When the valve core 223A is separated from the piston 222G, the intake passage and the exhaust port 223B are connected. When the valve core 223A is in abutment with the piston 222G, the intake passage and the exhaust port 223B are disconnected, and at this time, the compensation passage 223C continuously supplies gas, realizing the function of bypass compensation connection when the valve core 223A is closed. There are two groups of ventilation branches, which can realize the flow conversion of the output working port and complete the two flow switching functions. At the same time, the demand for gas input through the bypass path when the main path is disconnected is also met, thereby adapting to the switching work of the main gas path and the compensation gas path.

[0072] The upper end cover 221 and the piston 222G are provided with an intake passage, and the lower end cover 223 is provided with an exhaust passage.

[0073] The exhaust passage is in communication with the exhaust passage.

[0074] The intake passage is in communication with the on-off ball valve 23, the exhaust passage is in communication with the main trunk gas outlet 21, the main trunk gas outlet 21 is externally connected with a motor shell, and the main trunk gas inlet 26 is externally connected with a gas source.

[0075] The compensation passage 223C is in communication with the one-way valve 28.

[0076] Working principle: when the main gas path works, the gas sequentially passes through the filter 25, the gas path distributor 24, the on-off ball valve 23, the compensation shaft valve 22, and the main trunk gas outlet 21 from the main trunk gas inlet 26 into the motor shell.

[0077] At this time, the valve core 223A is disconnected from the piston 222G. When the gas enters the compensation shaft valve 22, the gas passes through the intake passage of the upper end cover 221 and the piston 222G, passes through the exhaust port 223B into the exhaust passage, and is discharged to the main trunk gas outlet 21 through the exhaust passage. Since the gas pressure at the compensation shaft valve 22 on the main gas path is higher than that of the pressure reducing valve 27, the one-way valve 28 works at this time, and the gas flow is not allowed to flow to the pressure reducing valve 27.

[0078] When the compensation gas path works, the main gas path is closed. At this time, the valve core 223A is in contact with the piston 222G, the intake passage is disconnected from the exhaust port 223B, and the gas sequentially passes through the filter 25, the gas path distributor 24, the pressure reducing valve 27, the one-way valve 28, and the compensation shaft valve 22 from the main trunk gas inlet 26 into the motor shell.

[0079] When the gas enters the compensation shaft valve 22, the gas enters the exhaust port 223B through the compensation gas channel 223C, enters the exhaust channel, and is discharged to the main channel exhaust port 21 through the exhaust channel.

[0080] By inflating the first gas port 222E or the second gas port 222F, the push ring 222C is pushed, and then the piston 222G is controlled to be in contact with or disconnected from the valve core 223A, and then the switching of the main gas path and the compensation gas path is controlled.

[0081] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the specific details in the above embodiments, and various equivalent transformations of the technical solutions of the utility model can be made within the technical concept range of the utility model, and these equivalent transformations all belong to the protection range of the utility model.

Claims

1. A ventilation system with a bypass compensation structure, comprising: Box body (1), bottom plate (3) installed inside the box body (1), and main road branch road (2) set on the bottom plate (3); The main road branch road (2) is characterized in that it comprises: The main air circuit includes a compensating shaft valve (22), a switching ball valve (23), an air circuit distributor (24), and a filter (25) that are connected in sequence and installed on the base plate (3); The compensating air path includes a one-way valve (28) connected to the compensating shaft valve (22) and a pressure reducing valve (27) connected at one end to the air path distributor (24) and at the other end to the one-way valve (28). The one-way valve (28) and the pressure reducing valve (27) are mounted on the base plate (3). The far end of the compensating shaft valve (22) and the filter (25) is connected to the main duct outlet (21) and the main duct inlet (26), respectively.

2. A ventilation system with a bypass compensation structure according to claim 1, characterized in that: The compensating shaft valve (22) includes an upper end cover (221), a lower end cover (223), and a valve body disposed between the upper end cover (221) and the lower end cover (223).

3. A ventilation system with a bypass compensation structure according to claim 2, characterized in that: The valve body includes: A valve body ring shell (222A) is disposed between the upper end cover (221) and the lower end cover (223). The valve body ring shell (222A) has a first air port (222E) and a second air port (222F) on its side. A piston (222G) is disposed inside the annular housing and extends into the upper end cover (221) and the lower end cover (223), and slides along the inner walls of the upper end cover (221) and the lower end cover (223). A push ring (222C) adapted to the valve body annular housing (222A) is sleeved on the piston (222G).

4. A ventilation system with a bypass compensation structure according to claim 3, characterized in that: There is a predetermined distance between the upper end cover (221) and the lower end cover (223); The valve body ring shell (222A) connects the upper end cover (221) and the lower end cover (223), and forms an air chamber (222D) with the upper end cover (221) and the lower end cover (223); The push ring (222C) is adapted to the air chamber (222D) and is located within a predetermined distance between the upper end cover (221) and the lower end cover (223); The first air port (222E) extends to one end of the air chamber (222D), and the second air port (222F) extends to the other end of the air chamber (222D).

5. A ventilation system with a bypass compensation structure according to claim 3, characterized in that: A spring (222B) is provided between the push ring (222C) and the lower end cover (223).

6. A ventilation system with a bypass compensation structure according to claim 3, characterized in that: The lower end cover (223) is provided with a valve core (223A) that abuts against the piston (222G), and a compensation air passage (223C) is opened on the side of the lower end cover (223); The valve core (223A) is provided with a sealing ring, and has multiple exhaust ports (223B) on its periphery, and an exhaust passage communicating with the multiple exhaust ports (223B) at the bottom; The sealing ring is located above the plurality of exhaust ports (223B) and abuts against the piston (222G).

7. A ventilation system with a bypass compensation structure according to claim 2, characterized in that: An air inlet is provided in the upper end cover (221) and the piston (222G), and an air outlet is provided in the lower end cover (223); The exhaust duct is connected to the air outlet duct.

8. A ventilation system with a bypass compensation structure according to claim 7, characterized in that: The air intake is connected to the switch ball valve (23), and the air outlet is connected to the main air outlet (21).

9. A ventilation system with a bypass compensation structure according to claim 7, characterized in that: The compensation air passage (223C) is connected to the one-way valve (28).