A fireproof heat insulation box for subway electric actuator

Abstract

The present invention discloses a fireproof insulation box for subway electric actuators, which belongs to the field of subway tunnel insulation technology. It includes a fireproof box, a plurality of heat exchange tubes are arranged on the side of the fireproof box, and the two ends of the heat exchange tubes pass through the fireproof box and are located outside the fireproof box. The two ends of the heat exchange tubes are respectively provided with a first collecting pipe and a second collecting pipe, and the two ends of the plurality of heat exchange tubes are respectively connected to the first collecting pipe and the second collecting pipe, and the first collecting pipe is provided with a water suction pipe connected thereto, and the outer side of the second collecting pipe is provided with a centrifugal pump, and the second collecting pipe is connected to the water inlet end of the centrifugal pump, and the water outlet end of the centrifugal pump is provided with a drain pipe, and the outer side of the centrifugal pump is provided with a rotating blade, and the rotating blade is rotatably connected to the fireproof box, and the middle part of the rotating blade is connected to the driving end of the centrifugal pump. This technical solution is used to solve the problem that the existing insulation components are difficult to meet the use requirements of the actuators in the subway tunnel.

Description

Technical Field

[0001] The invention belongs to the technical field of subway actuators, and in particular relates to a fireproof and heat-insulating box for a subway electric actuator. Background Art

[0002] The actuator is a device that uses electricity, compressed air or pressure oil as power, outputs the angle or linear displacement corresponding to the control signal, and pushes the adjustment mechanism with a certain torque or thrust to complete the production process parameter control requirements. It is also called an actuator.

[0003] There are more and more subway tunnels, and they are becoming more and more common. Electric actuators are indispensable components in subway tunnels. Because subway tunnels are underground, heat dissipation and ventilation conditions are not convenient. When installing existing actuators, they usually install a heat insulation box on the outside, or cover the actuator with a heat insulation layer to isolate the actuator from the influence of external heat. However, the heat insulation effect of the above method is limited, and the actuator itself will also generate heat when it is running. If there is too much heat and it accumulates inside the heat insulation box, it will also affect the stable operation of the actuator. Therefore, the heat insulation equipment in the prior art is difficult to meet the use requirements in subway tunnels. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a fireproof insulation box for a subway electric actuator, so as to solve the problem that the existing insulation components are difficult to meet the use requirements of the actuator in the subway tunnel.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a fireproof and heat-insulating box for a subway electric actuator, comprising a fireproof box, a plurality of heat exchange tubes being arranged on the side of the fireproof box, both ends of the heat exchange tubes passing through the fireproof box and being located outside the fireproof box, a first collecting tube and a second collecting tube being respectively arranged at both ends of the heat exchange tubes, both ends of the plurality of heat exchange tubes being respectively connected to the first collecting tube and the second collecting tube, a water suction pipe being arranged on the first collecting tube and the second collecting tube being connected thereto, a centrifugal pump being arranged on the outer side of the second collecting tube, the second collecting tube being connected to the water inlet end of the centrifugal pump, a drain pipe being arranged on the water outlet end of the centrifugal pump, a rotating blade being arranged on the outer side of the centrifugal pump, the rotating blade being rotatably connected to the fireproof box, and the middle part of the rotating blade being connected to the driving end of the centrifugal pump so as to drive the blades in the centrifugal pump to rotate, a water tank being arranged below the ground where the fireproof box is installed, the water tank being arranged in the soil layer, and both the water suction pipe and the drain pipe being connected to the inside of the water tank.

[0007] Furthermore, a temperature sensor is provided on the heat exchange tube, a drive motor is provided on the outer side of the rotating blade, a rotating shaft at the output end of the drive motor is fixedly connected to the middle of the rotating blade, and the temperature sensor is electrically connected to the drive motor.

[0008] Furthermore, a one-way valve is provided on the water inlet pipe, and the one-way valve is used to control the water flow from the water tank to the heat exchange tube. The drain pipe is provided with a pressure valve, and the pressure valve is used to control the initial pressure of the water flow in the heat dissipation tube to the water tank.

[0009] Furthermore, the pressure valve includes a spherical valve body, both ends of which are connected to a drain pipe, a hollow frame is provided on one end of the drain pipe connected to the spherical valve body, a spring is provided in the middle of the hollow frame, one end of the spring is fixedly connected to the hollow mounting frame, and the other end of the spring is provided with a piston block fixedly connected thereto, and the piston block is located in the drain pipe.

[0010] Furthermore, heat exchange tubes are provided on at least the upper and lower inner sides of the fireproof box.

[0011] Furthermore, a mounting frame for mounting the actuator is provided on the lower inner side surface of the fireproof box, the mounting frame is hollowed out, and the heat exchange tube is located between the mounting frame and the side surface of the fireproof box.

[0012] Furthermore, an exhaust pipe and a water exchange pipe are provided in the water tank, one end of the exhaust pipe and the water exchange pipe are connected to the water tank, and the other end is extended to the ground.

[0013] Furthermore, the water tank is provided with a float, a vertical rod is provided on the float, a hollow tube extending to the ground is provided on the upper side of the water tank, one end of the vertical rod is fixedly connected to the float, and the other end of the vertical rod passes through the interior of the hollow tube and extends above the ground.

[0014] Furthermore, the drainage pipe is connected to the lower end of the water tank, and the suction pipe is connected to the upper part of the water tank.

[0015] Furthermore, a plurality of heat transfer tubes are provided on the outer side of the water tank.

[0016] The beneficial effects of the present invention are:

[0017] (1) This technical solution does not require power. The wind generated by the subway can be used to dissipate heat and cool the working environment of the actuator to ensure the working condition of the actuator. (2) This technical solution cleverly utilizes the low temperature of the lower soil layer in the tunnel and uses low-temperature water through heat exchange pipes to exchange heat in the working environment of the actuator. This method has a simple structure and ingenious design. It does not require electricity and can operate stably for a long time.

[0018] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0020] Figure 1 It is a three-dimensional schematic diagram of the heat insulation box of the present invention;

[0021] Figure 2 A three-dimensional schematic diagram of the heat insulation box of the present invention from another perspective;

[0022] Figure 3 It is a three-dimensional schematic diagram of the heat insulation box of the present invention installed in a subway tunnel;

[0023] Figure 4 It is a three-dimensional schematic diagram of the heat exchange tubes and water tank inside the heat insulation box of the present invention;

[0024] Figure 5 A three-dimensional schematic diagram of the connection between the heat exchange tube inside the heat insulation box and the water tank from another perspective of the present invention;

[0025] Figure 6 is a schematic diagram of a pressure valve in a heat insulation box of the present invention;

[0026] Figure 7 It is a schematic diagram of installing a float ball in a water tank of the present invention.

[0027] The following are marked in the accompanying drawings:

[0028] Insulation box 1, heat exchange tube 2, first collecting pipe 3, water suction pipe 4, one-way valve 5, water tank 6, heat transfer tube 7, second collecting pipe 8, connecting frame 9, drain pipe 10, rotating blade 11, drive motor 12, rotating shaft 13, pressure valve 14, actuator 15, mounting frame 16, temperature sensor 17, centrifugal pump 18, hollow frame 19, piston block 20, spherical valve body 21, spring 22, float 23, vertical rod 24, hollow tube 25. DETAILED DESCRIPTION

[0029] like Figures 1 to 7As shown, the present invention is a fireproof insulation box 1 of a subway electric actuator 15, including a fireproof box. The fireproof box is a prior art. For example, the box body is a metal box body, and a fireproof material (fireproof board) is pasted on the metal box body. A plurality of heat exchange tubes 2 are arranged on the side of the fireproof box, which refers to the inner side of the fireproof box. The heat exchange tubes 2 are preferably copper tubes because copper tubes have a better heat transfer effect. Both ends of the heat exchange tubes 2 pass through the fireproof box and are located outside the fireproof box. Both ends of the heat exchange tubes 2 are respectively provided with a first collecting pipe 3 and a second collecting pipe 8. The purpose of the first collecting pipe 3 and the second collecting pipe 8 is to transfer the heat exchange The ends of the tubes 2 are connected, and of course, the five-way joints in the prior art are used. The specific number of valves can be determined according to the number of heat exchange tubes 2. The two ends of the heat exchange tubes 2 are connected to the first collection tube 3 and the second collection tube 8 respectively. The first collection tube 3 is provided with a water suction pipe 4 connected thereto. The water suction pipe 4 refers to the pipe for extracting water from the water tank 6. The outer side of the second collection tube 8 is provided with a centrifugal pump 18. The centrifugal pump 18 is a prior art, specifically referring to the centrifugal pump 18. When the centrifugal pump 18 is working, the liquid obtains energy under the action of inertial centrifugal force by relying on the high-speed rotating impeller to increase the pressure. Before the centrifugal pump 18 works, the pump body and the inlet pipeline must be filled with liquid medium to prevent cavitation. When the impeller rotates rapidly, the blades cause the medium to rotate quickly. The rotating medium flies out of the impeller under the action of centrifugal force. After the water in the pump is thrown out, a vacuum area is formed in the central part of the impeller. On the one hand, the liquid is continuously sucked in, and on the other hand, a certain amount of energy is continuously given to the sucked liquid to discharge the liquid. The second collecting pipe 8 is connected to the water inlet end of the centrifugal pump 18, and a drain pipe 10 is provided on the water outlet end of the centrifugal pump 18. A rotating blade 11 is provided on the outer side of the centrifugal pump 18, and the rotating blade 11 is rotatably connected to the fireproof box, specifically through a connecting frame 9. The end of the connecting frame 9 is fixed to the fireproof box, and the middle part is rotatably connected to the rotating blade 11, and the middle part of the rotating blade 11 is connected to the driving end of the centrifugal pump 18 to drive the blades in the centrifugal pump 18 to rotate. A water tank 6 is provided under the ground where the fireproof box is installed. The water tank 6 is set in the soil layer, and the suction pipe 4 and the drain pipe 10 are both connected to the inside of the water tank 6.

[0030] Of course, it is not difficult to understand that if the wind in the tunnel is used to drive the rotating blades 11 to rotate, the rotating blades 11 can be installed either facing the front direction of the subway or facing the side of the subway, which can be determined based on the actual installation method of the actuator 15.

[0031] The working principle of this technical solution is as follows:

[0032] When a subway passes through the subway tunnel, the high-speed movement of the subway will disturb the airflow in the tunnel and cause the air to move. Therefore, the moving air will contact the rotating blades 11, driving the rotating blades 11 to rotate. The rotating rotating blades 11 will drive the impeller in the centrifugal pump 18 to rotate, and then the water flow in the water tank 6 will be sucked into the heat exchange tube 2 through the suction pipe 4, and then enter the centrifugal pump 18 from the heat exchange tube 2, and finally discharged into the water tank 6 from the drainage pipe 10. When the water flow enters the heat exchange tube 2, it will exchange heat with the heat exchange tube 2, and then take away the heat of the heat exchange tube 2, and then take away the heat in the fireproof box, so that the operating environment temperature of the actuator 15 is moderate and high temperature will not occur. It should be further explained that since the water tank 6 is buried underground and the subway tunnel is generally located deep underground, the temperature of the underground soil layer there is relatively low, that is, the water temperature in the water tank 6 is low, that is, a better heat exchange effect can be achieved. Of course, the depth of the water tank 6 can be buried according to actual conditions. In this way, the internal working environment of the actuator 15 can be cooled without electrical energy.

[0033] In one feasible manner, a temperature sensor 17 is provided on the heat exchange tube 2. The temperature sensor 17 is used to monitor the temperature of the heat exchange tube 2. If the temperature exceeds a set threshold value, such as 65 degrees Celsius, the drive motor 12 is controlled to be powered on and rotated. A drive motor 12 is provided on the outside of the rotating blade 11. The rotating shaft 13 of the drive motor 12 is fixedly connected to the middle of the rotating blade 11. The rotating blade 11 and the centrifugal pump 18 can be connected by a connecting shaft. Of course, this step should also include components such as the control system in the prior art, which will not be described in detail here. This setting method is to prevent the actuator 15 from operating at a high frequency, generating a large amount of heat, or the temperature in the tunnel is too high, resulting in the temperature inside the box being too high. However, it is practical when the subway passes through the subway tunnel less frequently and the heat exchange effect of the heat exchange tube 2 does not meet expectations. The specific principle of use is that the temperature sensor 17 detects that the temperature of the heat exchange tube 2 is too high. At this time, the drive motor 12 rotates, driving the centrifugal pump 18 to work, thereby achieving the effect of pumping water for heat exchange.

[0034] Of course, it should be specially noted that when the driving motor 12 rotates, the rotating blades 11 will be driven to rotate. The rotating rotating blades 11 will generate wind, and the wind will be directed toward the heat exchange tube 2 and the fireproof box. At this time, the heat dissipation tube and the box will be further cooled to ensure the temperature of the fireproof box. It should also be noted that the part of the heat exchange tube 2 exposed to the outside of the fireproof box is preferably covered with an insulation layer in the prior art.

[0035] A one-way valve 5 is provided on the water inlet pipe, and the one-way valve 5 is used to control the water flow from the water tank 6 to the heat exchange tube 2. A pressure valve 14 is provided on the drain pipe 10, and the pressure valve 14 is used to control the initial pressure of the water in the heat exchange tube to flow to the water tank 6. The effect of this arrangement is that when the rotating blades 11 stop rotating, the heat exchange tube 2 loses the centrifugal force brought by the centrifugal pump 18, that is, the water in the heat exchange tube 2 stops flowing at this time, that is, the water pressure is difficult to open the pressure valve 14, that is, some water, that is, water with a lower temperature, will remain in the heat exchange tube 2, and when the rotating blades 11 are not working, better heat exchange can be carried out until the next rotation of the blades 11 is discharged.

[0036] Specifically, in this specific embodiment, a pressure valve 14 is also proposed, which includes a spherical valve body 21. Both ends of the spherical valve body 21 are connected to the drain pipe 10. The connection method is the same as the installation method of the valve in the prior art. A hollow frame 19 is provided on one end of the drain pipe 10 connected to the spherical valve body 21. The hollow frame 19 is provided so as not to affect the flow of water. A spring 22 is provided in the middle of the hollow frame 19. One end of the spring 22 is fixedly connected to the hollow mounting frame 16. The other end of the spring 22 is provided with a spring 22 fixedly connected to the hollow mounting frame 16. The piston block 20 is located in the drain pipe 10. The working principle of the pressure valve 14 is that when the centrifugal pump 18 is working, the water discharged by the centrifugal pump 18 has a certain water pressure, so the piston block 20 can be pushed into the spherical valve body 21, that is, at this time, the water flow can enter the spherical valve body 21 and be discharged. If the centrifugal pump 18 stops working, the water pressure is reduced and is not enough to overcome the elastic force of the spring 22. At this time, the spring 22 pushes the piston block 20 into the drain pipe 10 to block the drain pipe 10, thereby preventing all the water in the heat exchange tube 2 from being discharged.

[0037] Heat exchange tubes 2 are provided on at least the upper and lower inner sides of the fireproof box. Although this is only a preferred arrangement, in order to further improve the heat exchange effect, a plurality of heat exchange tubes 2 can be arranged on the inner side of the fireproof box.

[0038] In one feasible manner, a mounting frame 16 for mounting the actuator 15 is provided on the lower inner side surface of the fireproof box. The mounting frame 16 is hollowed out, and the heat exchange tube 2 is located between the mounting frame 16 and the side surface of the fireproof box. This arrangement is intended to ensure that the heat exchange tube 2 will not be squeezed and damaged when the straight-moving mechanism is installed. At the same time, the heat exchange tube 2 can also dissipate heat to the bottom of the actuator 15, further improving the heat exchange effect of the actuator 15 (if the bottom is tightly closed, heat accumulation will occur and the heat will be difficult to dissipate).

[0039] In one feasible method, an exhaust pipe and a water exchange pipe are provided in the water tank 6, one end of the exhaust pipe and the water exchange pipe are connected to the water tank 6, and the other end is extended to the ground. The exhaust pipe is provided to ensure that the water tank 6 is connected to the atmosphere, and negative pressure and other conditions will not occur, which will lead to problems such as difficulty in pumping water. The water exchange pipe is mainly used to add water to the water tank 6 to avoid excessive water discharge.

[0040] like Figure 7 As shown, a float 23 is provided in the water tank 6, a vertical rod 24 is provided on the float 23, a hollow tube 25 extending to the ground is provided on the upper side of the water tank 6, one end of the vertical rod 24 is fixedly connected to the float 23, and the other end of the vertical rod 24 passes through the interior of the hollow tube 25 and extends above the ground. The height of the water in the water tank 6 can be judged by the height of the vertical rod 24 extending out of the ground, and the staff can be reminded to add water. In addition, this method can detect the water depth in the water tank 6 without the need for electrical energy.

[0041] Preferably, the drain pipe 10 is connected to the lower end of the water tank 6, and the water suction pipe 4 is connected to the upper part of the water tank 6. Therefore, the water discharged from the drain pipe 10 has a higher temperature and is discharged from the bottom of the water tank 6 to the upper part. The water with a higher temperature can fully and quickly contact and cool down with the water in the water tank 6 during the rising process. At the same time, the water with a higher temperature moving from the bottom to the top contains air, and the air will generate bubbles and move upward, further enhancing the mixed cooling effect of the water with a higher temperature and the water with a lower temperature in the water tank 6. A plurality of heat transfer pipes 77 are provided on the outer surface of the water tank 66 to facilitate the temperature of the water in the water tank 66 to be exported to the soil layer for heat exchange.

[0042] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A fireproof and heat-insulating box for subway electric actuators, characterized by: It comprises a fireproof box, on the side of which a plurality of heat exchange tubes are arranged, both ends of the heat exchange tubes pass through the fireproof box and are located outside the fireproof box, both ends of the heat exchange tubes are respectively provided with a first collecting pipe and a second collecting pipe, both ends of the plurality of heat exchange tubes are respectively connected with the first collecting pipe and the second collecting pipe, the first collecting pipe is provided with a water suction pipe connected thereto, a centrifugal pump is provided on the outside of the second collecting pipe, the second collecting pipe is connected to the water inlet end of the centrifugal pump, a drain pipe is provided on the water outlet end of the centrifugal pump, a rotating blade is provided on the outside of the centrifugal pump, the rotating blade is rotatably connected to the fireproof box, and the middle part of the rotating blade is connected to the driving end of the centrifugal pump to drive the blades in the centrifugal pump to rotate, a water tank is provided below the ground where the fireproof box is installed, the water tank is arranged in the soil layer, and the water suction pipe and the drain pipe are both connected with the inside of the water tank.

2. A fireproof and heat-insulating box for subway electric actuators according to claim 1, characterized in that: A temperature sensor is provided on the heat exchange tube, a drive motor is provided on the outer side of the rotating blade, a rotating shaft at the output end of the drive motor is fixedly connected to the middle of the rotating blade, and the temperature sensor is electrically connected to the drive motor.

3. The fireproof and heat-insulating box for subway electric actuator according to claim 1, characterized in that: The water suction pipe is provided with a one-way valve, which is used to control the water flow from the water tank to the heat exchange tube. The drainage pipe is provided with a pressure valve, which is used to control the initial pressure of the water flow in the heat dissipation tube to the water tank.

4. A fireproof and heat-insulating box for subway electric actuator according to claim 3, characterized in that: The pressure valve includes a spherical valve body, both ends of which are connected to a drain pipe. A hollow frame is provided on one end of the drain pipe connected to the spherical valve body. A spring is provided in the middle of the hollow frame. One end of the spring is fixedly connected to the hollow mounting frame. The other end of the spring is provided with a piston block fixedly connected thereto, and the piston block is located in the drain pipe.

5. The fireproof and heat-insulating box for subway electric actuator according to claim 1, characterized in that: The fireproof box is provided with heat exchange pipes on at least the upper and lower inner sides.

6. The fireproof and heat-insulating box for subway electric actuator according to claim 5, characterized in that: A mounting frame for mounting the actuator is provided on the lower inner side surface of the fireproof box. The mounting frame is hollowed out, and the heat exchange pipe is located between the mounting frame and the side surface of the fireproof box.

7. The fireproof and heat-insulating box for subway electric actuator according to claim 1, characterized in that: An exhaust pipe and a water exchange pipe are arranged in the water tank. One end of the exhaust pipe and the water exchange pipe are communicated with the water tank, and the other end thereof is extended to the ground.

8. The fireproof and heat-insulating box for subway electric actuator according to claim 1, characterized in that: The water tank is provided with a float, the float is provided with a vertical rod, the upper side of the water tank is provided with a hollow tube extending to the ground, one end of the vertical rod is fixedly connected to the float, and the other end of the vertical rod passes through the interior of the hollow tube and extends above the ground.

9. The fireproof and heat-insulating box for subway electric actuator according to claim 1, characterized in that: The drainage pipe is connected to the lower end of the water tank, and the water suction pipe is connected to the upper part of the water tank.

10. The fireproof heat insulation box for subway electric actuator according to claim 1, characterized in that: A plurality of heat transfer tubes are arranged on the outer side of the water tank.

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