CN216447072U

CN216447072U - Integrated pump station under explosive gas atmosphere

Info

Publication number: CN216447072U
Application number: CN202123349976.4U
Authority: CN
Inventors: 潘世群
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-05-06
Anticipated expiration: 2031-12-28

Abstract

The utility model discloses an integrated pump station under an explosive gas atmosphere, which comprises a pump room, a control cabinet, an air compressor unit and a plurality of chemical pump units, wherein the top surface of the pump room is provided with an exhaust pipe, an explosive gas detector, a third temperature probe and an air pressure sensor; the lower part of the pump room is provided with a horizontal clapboard which divides the pump room into two spaces, namely an equipment room and a pressure equalizing room, which are arranged up and down, and the horizontal clapboard is provided with a plurality of pressure equalizing holes which are uniformly distributed; the control cabinet and the plurality of chemical pump units are arranged in the equipment room and fixed on the horizontal partition plate; the air compressor unit is connected with the air pipe. The utility model reduces the danger level of the working environment, and reduces the flammable and explosive environment to the non-flammable and explosive environment in the pump room; the original explosion-proof electric appliance with higher cost is changed into a non-explosion-proof electric appliance with lower cost, and meanwhile, the safety level is improved.

Description

Integrated pump station under explosive gas atmosphere

Technical Field

The utility model relates to an integrated pump station, in particular to an integrated pump station under an explosive gas environment.

Background

Petrochemical pumps are important equipment in the industries of oil refining, petrochemical industry and the like, and the petrochemical pumps cannot be used for flowing any process fluid. In industries such as oil refining and petrochemical industry, petrochemical pumps work in flammable and explosive gas environments, and flammable and explosive gases such as hydrogen, methane, acetylene, ethane, ethylene and propylene are often distributed in the air environments. In an explosive gas atmosphere, electrical equipment such as a motor of a petrochemical pump and a control cabinet is required to be an explosion-proof electrical appliance, for example, the motor is an explosion-proof motor or an increased safety motor.

However, the explosion-proof motor or increased safety motor matched with the existing petrochemical pump has many defects, on one hand, under the same explosive gas atmosphere, hundreds of petrochemical pumps can work simultaneously, if the explosion-proof motor matched with one petrochemical pump explodes due to a fault, catastrophic accidents in the whole explosive area can be caused, and inestimable loss can be caused; on the other hand, the initial cost and the operation cost of the explosion-proof motor and the explosion-proof control cabinet are higher, the reliability is lower, and only one safety protection measure is provided. Explosion-proof authentication is required for explosion-proof electrical appliances, type inspection and authentication are required for brand-new design and modified design, the requirement on the processing precision of equipment is high, and the initial cost of the explosion-proof electrical appliances is high due to the fact that the equipment is brand-new and modified. In addition, the operation cost of explosion-proof electrical appliances such as explosion-proof motors is high, for example, due to the long-time use of the explosion-proof motors, the explosion-proof joint surface is abraded, the explosion-proof performance is reduced, the cost of return maintenance is high, and the normal work of the chemical engineering process can be influenced. Explosion-proof electrical appliances such as explosion-proof motors and the like only have one safety protection measure, and if the explosion-proof electrical appliances fail, immeasurable loss can be caused. Finally, the safety and reliability of the explosion-proof control cabinet are also low.

In a word, the anti-explosion electric appliance matched with the existing petrochemical pump has higher cost, lower reliability and poorer safety.

Disclosure of Invention

In order to solve the problems, the utility model provides an integrated pump station under an explosive gas atmosphere, which can well overcome the defects of high cost, low reliability, poor safety and the like of an explosion-proof electric appliance in the prior art.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the integrated pump station under the explosive gas atmosphere comprises a pump room, a control cabinet, an air compressor unit and a plurality of chemical pump units, wherein the top surface of the pump room is provided with an exhaust pipe, an explosive gas detector, a third temperature probe and an air pressure sensor, and the air compressor unit is connected with the pump room through an air pipe; the pump room is of a full-sealing structure and is made of light materials, and a sealing door and a transparent window are arranged on the side face of the pump room; the lower part of the pump room is provided with a horizontal clapboard which divides the pump room into an equipment room and a pressure equalizing room which are arranged up and down, the horizontal clapboard is provided with a plurality of uniformly distributed pressure equalizing holes which communicate the equipment room with the pressure equalizing room; the control cabinet and the plurality of chemical pump sets are arranged in the equipment room and are fixed on the horizontal partition plate; the chemical pump set comprises a pump head and a motor, wherein a bearing position of the pump head is provided with a second temperature probe, and a bearing position of the motor is provided with a first temperature probe; the air compressor unit comprises an air compressor, an air filter and a variable frequency motor, the air filter is connected with an inlet of the air compressor, the variable frequency motor is used for driving the air compressor, and an outlet of the air compressor is connected with the air pipe;

the control cabinet comprises a programmable controller, a frequency converter and a plurality of alternating current contactors, wherein the programmable controller is a controller of the integrated pump station, and the frequency converter is a driver of the variable frequency motor; the first temperature probe, the second temperature probe, the third temperature probe, the explosive gas detector and the air pressure sensor are all connected with the programmable controller through signal lines, the control end of the frequency converter is connected with the programmable controller, the power output cable of the frequency converter is connected with the variable frequency motor, the control end of the alternating current contactor is connected with the programmable controller, and the power output cable of the alternating current contactor is connected with the motor.

As a further improvement of the utility model, the air pressure inside the pump room is slightly higher than the air pressure outside the pump room.

As a further improvement of the utility model, the sealing door and the transparent window are completely sealed with the pump room under the condition that the integrated pump station normally works.

As a further improvement of the utility model, the control cabinet, the motor, the variable frequency motor, the explosive gas detector, the first temperature probe, the second temperature probe, the third temperature probe and the air pressure sensor are all non-explosion-proof electric appliances.

As a further improvement of the utility model, the exhaust pipe comprises a rain-proof cap and a hollow pipe; the hollow pipe is provided with a one-way valve which only allows gas to flow from the inside of the pump room to the outside of the pump room.

As a further improvement of the utility model, the pump room is in an explosive gas environment, and the air compressor unit is in a non-explosive gas environment.

As a further improvement of the utility model, the bottom surface and the top surface of the cabinet body of the control cabinet are respectively provided with an air inlet and an air outlet.

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

1. the danger level of the working environment is reduced: the flammable and explosive environment of the original equipment is reduced to the non-flammable and explosive environment in the pump room.

2. The equipment cost is reduced: the original explosion-proof electric appliance with higher cost is replaced by a non-explosion-proof electric appliance with lower cost.

3. The safety level is improved: multiple measures are taken to warn of danger or to increase the safety level.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model without limiting the utility model in which:

fig. 1 is a schematic diagram of the principle of the present invention.

Fig. 2 is a partially enlarged view at I of fig. 1.

Fig. 3 is a schematic diagram of the control cabinet of the present invention.

Fig. 4 is a plan view of the air compressor unit of the present invention.

In the figure: 1. the system comprises a pump room, 2, a chemical pump set, 3, a control cabinet, 4, an air compressor unit, 5, an exhaust pipe, 6, an explosive gas detector, 7, a first temperature probe, 8, a second temperature probe, 9, a third temperature probe, 10, an air pressure sensor, 11, a sealing door, 12, a transparent window, 13, a pressure equalizing chamber, 14, an equipment room, 15, a horizontal partition plate, 16, a pressure equalizing hole, 21, a pump head, 22, a motor, 31, a programmable controller, 32, a frequency converter, 33, an alternating current contactor, 41, an air compressor, 42, an air filter, 43, a variable frequency motor, 44, an air pipe, 51, a rain-proof cap, 52 and a hollow pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the mechanical connection can be welding, riveting, threaded connection, flange connection or the like; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 4, the integrated pump station provided by the utility model under the explosive gas atmosphere comprises a pump room 1, a control cabinet 3, an air compressor unit 4 and a plurality of chemical pump units 2, wherein the top surface of the pump room 1 is provided with an exhaust pipe 5, an explosive gas detector 6, a third temperature probe 9 and an air pressure sensor 10, and the air compressor unit 4 is connected with the pump room 1 through an air pipe 44. The pump room 1 is made of light materials and adopts a full-sealing structure, and a sealing door 11 and a transparent window 12 are arranged on the side face of the pump room 1. The sealing door 11 and the transparent window 12 are completely sealed with the pump room 1 under the condition that the integrated pump station normally works. The pump room 1 with the full-sealing structure can completely separate the inside and the outside of the pump room 1 to form two space environments, the sealing door 11 can ensure the strict sealing of the pump room 1 when being closed, the transparent window 12 can ensure that the condition of the inside of the pump room 1 can be observed from the outside under the sealing condition, and meanwhile, certain lighting can be provided. The lower part of the pump room 1 is provided with a horizontal clapboard 15, the horizontal clapboard 15 divides the pump room 1 into two spaces of an equipment room 14 and a pressure-equalizing room 13 which are arranged up and down, the horizontal clapboard 15 is provided with a plurality of pressure-equalizing holes 16 which are uniformly distributed, the equipment room 14 is communicated with the pressure-equalizing room 13 through the pressure-equalizing holes 16, and the pressure-equalizing holes 16 can make the compressed air in the pressure-equalizing room 13 uniformly flow into the equipment room 14. The control cabinet 3 and the plurality of chemical pump units 2 are arranged in the equipment room 14 and fixed on the horizontal partition plate 15. The chemical pump group 2 comprises a pump head 21 and a motor 22, a second temperature probe 8 is arranged at a bearing position of the pump head 21, a first temperature probe 7 is arranged at a bearing position of the motor 22, temperature probes can be arranged on a motor winding and an iron core if necessary, and the temperature probes comprising the first temperature probe 7 and the second temperature probe 8 can monitor the highest temperature of relevant parts. The air compressor unit 4 includes an air compressor 41, an air filter 42, and a variable frequency motor 43, wherein the air filter 42 is connected to an inlet of the air compressor 41, the variable frequency motor 43 is used for driving the air compressor 41, and an outlet of the air compressor 41 is connected to an air pipe 44. The air compressor unit 4 is a power source for generating compressed air, and the inverter motor 43 can change the rotation speed of the air compressor 41 so as to adjust the output flow rate and pressure.

The control cabinet 3 comprises a programmable controller 31, a frequency converter 32 and a plurality of alternating current contactors 33, wherein the programmable controller 31 is a controller of an integrated pump station, and the frequency converter 32 is a driver of a variable frequency motor 43. The first temperature probe 7, the second temperature probe 8, the third temperature probe 9, the explosive gas detector 6 and the air pressure sensor 10 are all connected with the programmable controller 31 through signal lines, the control end of the frequency converter 32 is connected with the programmable controller 31, the power output cable of the frequency converter 32 is connected with the variable frequency motor 43, the control end of the alternating current contactor 33 is connected with the programmable controller 31, and the power output cable of the alternating current contactor 33 is connected with the motor 22. The programmable controller 31 can process the signals received from the first temperature probe 7, the second temperature probe 8, the third temperature probe 9, the explosive gas detector 6 and the air pressure sensor 10, and make corresponding responses according to different signal values by judging the signals, such as sending an alarm, adjusting the rotating speed of the variable frequency motor 43 or shutting down the motor 22. The programmable controller 31 controls the ac contactor 33 to start and stop the motor 22, and sends instructions to the inverter 32 to change the output frequency of the inverter 32, thereby adjusting the rotation speed of the inverter motor 43.

The air pressure in the pump room 1 is slightly higher than the air pressure outside the pump room 1, so that the air containing explosive gas outside the pump room 1 can not flow back into the pump room 1, and a non-explosive gas environment is formed in the pump room 1. Although the pump room 1 is exposed to an explosive gas atmosphere, the air compressor unit 4 is exposed to a non-explosive gas atmosphere, so that it is ensured that the air introduced into the pump room 1 through the air compressor unit 4 is a non-explosive gas.

The control cabinet 3, the motor 22, the variable frequency motor 43, the explosive gas detector 6, the first temperature probe 7, the second temperature probe 8, the third temperature probe 9 and the air pressure sensor 10 are all non-explosion-proof electric appliances. Compared with the explosion-proof electric appliance in the prior art, the embodiment can adopt a non-explosion-proof electric appliance, thereby not only reducing the technical difficulty and cost of the equipment, but also improving the reliability and safety of the equipment.

The exhaust pipe 5 includes a rain-proof cap 51 and a hollow pipe 52. The hollow pipe 52 is provided with a one-way valve which only allows the gas to flow from the inside of the pump room 1 to the outside of the pump room 1, so that the air containing explosive gas outside the pump room 1 can be further ensured not to flow back into the pump room 1.

The bottom surface and the top surface of the cabinet body of the control cabinet 3 are respectively provided with an air inlet and an air outlet, so that air in the control cabinet 3 can be continuously replaced.

The working principle of the embodiment is as follows:

the air compressor unit 4 in the non-explosive gas environment is a pure air supercharging device, after the air is filtered by the air filter 42, the pure air enters the air compressor 41 for supercharging, and the compressed air enters the pressure equalizing chamber 13 at the lower part of the pump room 1 through the air pipe 44. Then the compressed air flows into the equipment room 14 through the pressure equalizing holes 16 uniformly to replace the air mixed with part of the flammable and explosive gas, and the original gas is discharged out of the pump room 1 through the exhaust pipe 5, so that the equipment room 14 is changed from the explosive gas environment to the non-explosive gas environment, the control cabinet 3 and the chemical pump set 2 arranged in the equipment room 14 can adopt non-explosion-proof equipment, and the equipment cost is greatly reduced. The explosive gas detector 6 is used for monitoring whether the gas in the pump room 1 contains explosive gas with a certain concentration, if the chemical pump unit 2 for conveying inflammable and explosive media leaks, the explosive gas is mixed in the gas in the equipment room 14, and at this time, the explosive gas detector 6 transmits the detected concentration value to the programmable controller 31 in the control cabinet 3. The programmable controller 31 sends an instruction to the frequency converter 32 to increase the output frequency of the frequency converter 32, so as to increase the rotation speed of the variable frequency motor 43, and finally, the air compressor unit 4 increases the flow rate and pressure of the compressed air. The gas in the equipment chamber 14 is thus quickly displaced, ensuring a non-explosive gas atmosphere within the equipment chamber 14 to avoid a deflagration event. The first temperature probe 7 and the second temperature probe 8 are used for monitoring the temperature of the surface of the equipment, if abnormal overtemperature exists, a signal is transmitted to the programmable controller 31, and the programmable controller 31 controls the alarm to give an alarm or shut down related equipment for maintenance. The first temperature probe 7 is used to monitor the overall temperature of the gas in the equipment room 14, and on the other hand to ensure the safety of the equipment in the pump room 1. When a worker opens the sealing door 11 and enters the pump room 1, the gas in the pump room 1 rapidly overflows to the outside of the pump room 1 from the inside, the pressure of the gas in the pump room 1 is reduced, the pressure sensor 10 installed at the top of the pump room 1 can transmit the pressure value at the moment to the programmable controller 31, the programmable controller 31 sends an instruction to the frequency converter 32 to improve the output frequency of the frequency converter 32, so that the rotating speed of the variable frequency motor 43 is improved, and finally the air compressor unit 4 is used for increasing the flow and the pressure of the compressed air to balance the reduction of the pressure in the pump room 1 until the pressure reaches the original set value. Therefore, the safety of the integrated pump station is ensured by multiple measures.

Compare with the explosion-proof equipment of prior art work in explosive gas atmosphere, the integrated pump station has apparent advantage under the explosive gas atmosphere of this embodiment:

the danger level of the working environment is reduced, and the flammable and explosive environment of the original equipment is reduced to the non-flammable and explosive environment in the pump room 1; the equipment cost is reduced, and the original explosion-proof electric appliance with higher cost is changed into a non-explosion-proof electric appliance with lower cost; the safety level is improved, and multiple measures are adopted to early warn danger or improve the safety level.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Integration pump station under explosive gas atmosphere environment, its characterized in that: the system comprises a pump room, a control cabinet, an air compressor unit and a plurality of chemical pump sets, wherein an exhaust pipe, an explosive gas detector, a third temperature probe and a pressure sensor are arranged on the top surface of the pump room, and the air compressor unit is connected with the pump room through an air pipe; the pump room is of a full-sealing structure and is made of light materials, and a sealing door and a transparent window are arranged on the side face of the pump room; the lower part of the pump room is provided with a horizontal clapboard which divides the pump room into an equipment room and a pressure equalizing room which are arranged up and down, the horizontal clapboard is provided with a plurality of uniformly distributed pressure equalizing holes which communicate the equipment room with the pressure equalizing room; the control cabinet and the plurality of chemical pump sets are arranged in the equipment room and are fixed on the horizontal partition plate; the chemical pump set comprises a pump head and a motor, wherein a bearing position of the pump head is provided with a second temperature probe, and a bearing position of the motor is provided with a first temperature probe; the air compressor unit comprises an air compressor, an air filter and a variable frequency motor, the air filter is connected with an inlet of the air compressor, the variable frequency motor is used for driving the air compressor, and an outlet of the air compressor is connected with the air pipe;

the control cabinet comprises a programmable controller, a frequency converter and a plurality of alternating current contactors, the programmable controller is a controller of the integrated pump station, and the frequency converter is a driver of the variable frequency motor; the first temperature probe, the second temperature probe, the third temperature probe, the explosive gas detector and the air pressure sensor are all connected with the programmable controller through signal lines, the control end of the frequency converter is connected with the programmable controller, the power output cable of the frequency converter is connected with the variable frequency motor, the control end of the alternating current contactor is connected with the programmable controller, and the power output cable of the alternating current contactor is connected with the motor.

2. The integrated pump station under explosive gas atmosphere according to claim 1, wherein: the air pressure in the pump room is slightly higher than the air pressure outside the pump room.

3. The explosive gas atmosphere integrated pump station according to claim 1, wherein: the sealing door and the transparent window are completely sealed between the pump rooms under the condition that the integrated pump station normally works.

4. The explosive gas atmosphere integrated pump station according to claim 1, wherein: the control cabinet, the motor, the variable frequency motor, the explosive gas detector, the first temperature probe, the second temperature probe, the third temperature probe and the air pressure sensor are all non-explosion-proof electric appliances.

5. The explosive gas atmosphere integrated pump station according to claim 1, wherein: the exhaust pipe comprises a rain-proof cap and a hollow pipe; the hollow pipe is provided with a one-way valve which only allows gas to flow from the inside of the pump room to the outside of the pump room.

6. The integrated pump station under explosive gas atmosphere according to claim 1, wherein: the pump room is in an explosive gas environment, and the air compressor unit is in a non-explosive gas environment.

7. The integrated pump station under explosive gas atmosphere according to claim 1, wherein: and the bottom surface and the top surface of the cabinet body of the control cabinet are respectively provided with an air inlet and an air outlet.