Internal circulating water cooling heat dissipation system and heat dissipation method of electric drive cementing equipment

Abstract

The application discloses an inner circulating water cooling heat dissipation system of an electric drive well cementing device, which comprises a water tank, a motor water cooling unit and a plurality of oil liquid water cooling units are arranged in the water tank, the motor water cooling unit and the plurality of oil liquid water cooling units are respectively connected with a central processing unit through signal lines, and the central processing unit is further connected with a temperature sensor unit through signal lines. The application further discloses a heat dissipation method using the system, specifically comprising the following steps: S1, starting the motor water cooling unit; S2, when the oil return oil temperature of the hydraulic oil is greater than or equal to the control temperature of the three-way temperature control valve, the second driving motor is started, the water of the water tank enters the oil liquid water cooling submersible pump, is heat exchanged through the oil liquid water cooling radiator and is discharged into the water tank, the hydraulic oil flowing into the three-way temperature control valve enters the oil liquid water cooling radiator and is discharged through the hydraulic oil outlet pipe, and when the oil return oil temperature of the hydraulic oil is less than the control temperature of the three-way temperature control valve, the hydraulic oil is discharged through the first oil return pipeline. The system solves the problem of low efficiency of air cooling heat dissipation of the existing electric drive well cementing device.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field development equipment technology, specifically to an internal circulating water cooling system for electric cementing equipment. This invention also relates to a method for heat dissipation using the aforementioned internal circulating water cooling system for electric cementing equipment. Background Technology

[0002] Cementing equipment is mainly used for cementing operations during drilling. Its function is to mix cement slurry and pump it into the annular space between the wellbore and the casing. After solidification, it achieves the purpose of reinforcing the wellbore, supporting the casing, and sealing off oil, gas, and water layers. The entire equipment mainly includes a high-energy mixer, a mixing tank, a water tank, a clean water pipeline, a mud pipeline, a secondary mixing pipeline, a mud pump, a centrifugal pump, a hydraulic system, a lubrication system, and a control system. The working process can be briefly summarized as follows: the clean water centrifugal pump draws clean water from the water tank and pumps it to the high-energy mixer through the clean water pipeline. After premixing with cement slurry supplied from the external cement supply equipment through the slurry inlet, the mixture falls into the mixing tank. The hydraulic system drives the impeller in the mixing tank to continue mixing it evenly. The mud centrifugal pump, driven by the hydraulic system, draws the mixed mud from the mixing tank and pumps it to the mud pump through the mud pipeline. The mud pump then pumps the mud into the annular space between the wellbore and the casing. To ensure more uniform mud mixing, a branch line is inserted into the mud pipeline and sent to the mixing tank for secondary mixing. The lubrication system pumps cool lubricating oil into the power end of the mud pump, lubricating the plunger and dissipating the heat generated by its high-speed rotation. The mud pump, hydraulic system, and lubrication system are all driven by electric motors.

[0003] The heat generated by the motor, hydraulic system, and lubrication system during operation needs to be dissipated in a timely manner to ensure normal system operation. Currently, most electric cementing equipment on the market uses air cooling. Air cooling has drawbacks, including high operating noise and a large power-to-volume ratio. For the same cooling capacity, air-cooled devices are typically two times or more larger than water-cooled devices. Due to their large size, air-cooled devices are often installed in the space above the motor. If there is an oil leak in the internal cooling oil pipes or at the interface of the air-cooled device, the oil dripping onto the operating motor could pose a fire risk. Summary of the Invention

[0004] The purpose of this invention is to provide an internal circulating water cooling system for electric cementing equipment, which solves the problem of low efficiency in the existing air-cooled cooling system for electric cementing equipment.

[0005] Another object of the present invention is to provide a method for heat dissipation using the circulating water cooling system inside the above-mentioned electric cementing equipment.

[0006] The first technical solution adopted in this invention is: an internal circulating water cooling heat dissipation system for electric cementing equipment, including a water tank, which is equipped with a motor water cooling unit and several oil water cooling units. The motor water cooling unit and several oil water cooling units are respectively connected to a central processing unit through signal lines. The central processing unit is also connected to a temperature sensor unit through signal lines.

[0007] The first technical solution of this invention is further characterized by: The water-cooled motor unit includes a water-cooled submersible pump. The submersible pump houses a first drive motor. The pump's casing is fixed to the bottom of the water tank. The pump's input end is connected to the inner cavity of the water tank. The pump's output end is connected to a filter via a pipe. The other end of the filter is connected to a proportional multi-way flow valve via a pipe. The proportional multi-way flow valve has a first branch outlet and a second branch outlet. Each of the first and second branch outlets has a valve plate. The first branch outlet is connected to a main motor heat exchanger. The other end of the main motor heat exchanger is connected to a first branch inlet. The second branch outlet is connected to an auxiliary motor heat exchanger. The other end of the auxiliary motor heat exchanger is connected to a second branch inlet. The first and second inlets are both connected to the output end of the proportional multi-way flow valve, which is connected to the inner cavity of the water tank.

[0008] The first and second inlet water outlets are each equipped with a motor water-cooled unit flow sensor, and the two motor water-cooled unit flow sensors are connected to the central processing unit via signal lines; the first drive motor is connected to the central processing unit via signal lines; and the proportional multi-way flow valve is connected to the central processing unit via signal lines.

[0009] The oil-water cooling unit includes an oil-water cooled submersible pump with a second drive motor inside. The pump's casing is fixed to the bottom of the water tank. The pump's input end is connected to the inner cavity of the water tank, and its output end is connected to the inlet of an oil-water cooled radiator via a pipe. The radiator's outlet is also connected to the inner cavity of the water tank. The unit also includes a hydraulic oil inlet pipe, one end of which is connected to a three-way thermostatic valve. The other two ports of the valve are connected to a first return oil line and the radiator's inlet via pipes, respectively. A flow sensor is installed between the three-way thermostatic valve and the radiator. The radiator's outlet is connected to a second return oil line via a pipe.

[0010] The flow sensor of the oil-water cooling unit is connected to the central processing unit via a signal line, and the second drive motor is also connected to the central processing unit via a signal line.

[0011] The temperature sensor unit includes a motor water-cooled temperature sensor, which is located at the output of the proportional multi-way flow valve.

[0012] The second technical solution adopted in this invention is a method for heat dissipation using a circulating water cooling system within an electrically driven cementing device, specifically including the following steps: S1. Start the water-cooled motor unit; S2. When the return oil temperature of the hydraulic oil is greater than or equal to the control temperature of the three-way thermostatic valve, the central processing unit issues a start command to the second drive motor. The water in the water tank enters the oil-cooled submersible pump, passes through the oil-cooled radiator for heat exchange, and is then discharged into the water tank. The hydraulic oil flowing into the three-way thermostatic valve enters the oil-cooled radiator and is then discharged through the hydraulic oil outlet pipe. When the return oil temperature of the hydraulic oil is less than the control temperature of the three-way thermostatic valve, the hydraulic oil is discharged through the first return oil line.

[0013] The second technical solution of the present invention is further characterized by: The specific steps of S1 are as follows: When the temperature detected by the motor water-cooling temperature sensor is greater than or equal to the control temperature, the central processing unit issues a start command to the first drive motor. After the water in the water tank enters the motor water-cooling submersible pump, it is filtered by the filter and then enters the proportional multi-way flow valve. The valve opening degree of the first branch outlet and the second branch outlet of the proportional multi-way flow valve is related to the required cooling water flow rate of the first drive motor. When the temperature detected by the motor water-cooling temperature sensor is higher than the set temperature, the central processing unit issues a command to the proportional multi-way flow valve to increase the opening of the corresponding valve and increase the cooling water flow rate of that branch. Then the water flows into the main motor heat exchanger and the auxiliary motor heat exchanger for heat exchange. Finally, the water flows out of the output end of the proportional multi-way flow valve and into the water tank.

[0014] The beneficial effects of this invention are: The internal circulating water cooling system of the electric cementing equipment of this invention solves the problems of large space occupation and difficult layout of air cooling in electric cementing equipment, improves the heat dissipation efficiency of the equipment, and enhances the safety and reliability of the equipment. The flow rates of the motor water cooling unit and the oil water cooling unit are adjustable. Based on the monitoring results of sensors at various points in the system, the operating power and flow rate of the submersible pump can be adjusted in a timely manner to improve the matching degree between cooling power and heat generation power, thereby achieving the purpose of energy saving and consumption reduction. No external water supply is required, as the cementing equipment itself has a large-capacity water tank with a rapid water turnover rate during operation. The system offers excellent cooling, requires no external water supply, has low requirements for supporting equipment, and allows for more flexible operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the internal circulating water cooling system of the electric cementing equipment of the present invention.

[0016] In the diagram, 1. Water tank, 2. Central processing unit, 3. Temperature sensor unit, 4. Motor water cooling unit, 5. Oil water cooling unit; 401. Motor-cooled submersible pump; 402. Filter; 403. Proportional multi-way flow valve; 404. Main motor heat exchanger; 405. Auxiliary motor heat exchanger; 406. Motor water-cooled unit flow sensor; 501. Oil-water cooled submersible pump; 502. Oil-water cooled radiator; 503. Three-way temperature control valve; 504. Oil-water cooled unit flow sensor. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 As shown, the present invention provides an internal circulating water cooling heat dissipation system for an electric cementing equipment, including a water tank 1, which is equipped with a motor water cooling unit 4 and several oil water cooling units 5. The motor water cooling unit 4 and several oil water cooling units 5 are respectively connected to a central processing unit 2 via signal lines. The central processing unit 2 is also connected to a temperature sensor unit 3 via signal lines.

[0019] The water-cooled motor unit 4 includes a water-cooled submersible pump 401. A first drive motor is installed inside the water-cooled submersible pump 401. The outer casing of the water-cooled submersible pump 401 is fixed to the bottom of the water tank 1. The input end of the water-cooled submersible pump 401 is connected to the inner cavity of the water tank 1. The output end of the water-cooled submersible pump 401 is connected to a filter 402 via a pipe. The other end of the filter 402 is connected to a proportional multi-way flow valve 403 via a pipe. The proportional multi-way flow valve 403 has a first outlet and a second outlet. The first and second outlets are each equipped with valve plates. The first outlet is connected to the main motor heat exchanger 404, and the other end of the main motor heat exchanger 404 is connected to the first inlet. The second outlet is connected to the auxiliary motor heat exchanger 405, and the other end of the auxiliary motor heat exchanger 405 is connected to the second inlet. The first and second inlets are connected to the output end of a proportional multi-way flow valve, which is connected to the inner cavity of the water tank 1.

[0020] The first and second inlet water outlets are respectively equipped with motor water-cooled unit flow sensors 406, and the two motor water-cooled unit flow sensors 406 are connected to the central processing unit 2 through signal lines; the first drive motor is connected to the central processing unit 2 through signal lines; the proportional multi-way flow valve 403 is connected to the central processing unit 2 through signal lines.

[0021] The oil-water cooling unit 5 includes an oil-water cooled submersible pump 501, which has a second drive motor inside. The outer casing of the oil-water cooled submersible pump 501 is fixed to the bottom of the water tank 1. The input end of the oil-water cooled submersible pump 501 is connected to the inner cavity of the water tank 1, and the output end of the oil-water cooled submersible pump 501 is connected to the inlet of the oil-water cooled radiator 502 through a pipe. The outlet of the oil-water cooled radiator 502 is connected to the inner cavity of the water tank 1. It also includes a hydraulic oil inlet pipe, one end of which is connected to a three-way thermostatic valve 503. The other two ports of the three-way thermostatic valve 503 are respectively connected to... The pipeline connects the first return oil line and the inlet of the oil-water cooling radiator 502. An oil-water cooling unit flow sensor 504 is installed between the three-way thermostatic valve 503 and the oil-water cooling radiator 502. The outlet of the oil-water cooling radiator 502 is connected to the second return oil line through a pipeline. Each oil-water cooling radiator 502 can be connected to different oil circuits to cool different oils: for hydraulic oil-water cooling equipment, the inlet of the three-way thermostatic valve 503 is connected to the return oil line of the hydraulic oil-water cooling equipment, and the first and second return oil lines are connected to the hydraulic oil tank; the same applies to the lubricating oil-water cooling system.

[0022] The flow sensor 504 of the oil-water cooling unit is connected to the central processing unit 2 via a signal line, and the second drive motor is also connected to the central processing unit 2 via a signal line.

[0023] Temperature sensor unit 3 includes a motor water-cooled temperature sensor, which is located at the output end of the proportional multi-way flow valve. The motor water-cooled temperature sensor is used to monitor the temperature of the main motor and auxiliary motor on the cementing equipment. It is connected to the central processing unit 2 via a cable and converts the collected information into a current signal, which is then transmitted to the central processing unit 2. After receiving and processing the sensor signal, the central processing unit 2 makes a response decision and converts the decision into a current signal, which is then transmitted to the corresponding actuators in the motor water-cooled unit 4 and the oil water-cooled unit 5 via a cable. This automatically adjusts the cooling water flow rate of the motor water-cooled unit 4 and the oil water-cooled unit 5, improving the matching degree between the power of the water-cooling system and the heat dissipation power, thereby achieving the purpose of energy saving and consumption reduction.

[0024] The method of using an internal circulating water cooling system in electrically driven cementing equipment for heat dissipation specifically includes the following steps: S1. Start the motor water cooling unit 4; the specific steps are as follows: when the temperature detected by the motor water cooling temperature sensor is greater than or equal to the control temperature, the central processing unit 2 issues a start command to the first drive motor. The water in the water tank 1 enters the motor water cooling submersible pump 401 and is filtered by the filter 402 before entering the proportional multi-way flow valve 403. The valve opening degree of the first branch outlet and the second branch outlet of the proportional multi-way flow valve 403 is related to the required cooling water flow rate of the first drive motor. When the temperature detected by the motor water cooling temperature sensor is higher than the set temperature, the central processing unit 2 issues a command to the proportional multi-way flow valve 403 to increase the opening of the corresponding valve plate and increase the cooling water flow rate of that branch. Then the water flows into the main motor heat exchanger 404 and the auxiliary motor heat exchanger 405 for heat exchange. Finally, the water flows out of the output end of the proportional multi-way flow valve and into the water tank 1.

[0025] S2. When the return oil temperature of the hydraulic oil is greater than or equal to the control temperature of the three-way thermostatic valve 503, the central processing unit 2 issues a start command to the second drive motor. The water in the water tank 1 enters the oil-cooled submersible pump 501, passes through the oil-cooled radiator 502 for heat exchange, and is then discharged into the water tank 1. The hydraulic oil flowing into the three-way thermostatic valve 503 enters the oil-cooled radiator 502 and is then discharged through the hydraulic oil outlet pipe. When the return oil temperature of the hydraulic oil is less than the control temperature of the three-way thermostatic valve 503, the hydraulic oil is discharged through the first return oil pipe.

[0026] This invention provides an internal circulating water cooling system for electrically driven cementing equipment. The system utilizes clean water from the water tank 1 of the cementing equipment to provide water cooling for the motor water-cooling unit 4 and the oil water-cooling unit 5. This system offers high cooling efficiency, a small footprint, and avoids the safety hazards associated with air cooling. The water-cooled motor also operates with low noise. The intelligent internal circulating water cooling system eliminates the need for additional water supply pipelines, reduces the requirements for cementing equipment installation, and features intelligent control of the water cooling process, resulting in high efficiency and energy savings.

[0027] Example 1 like Figure 1 As shown, the internal circulating water cooling system of the electric cementing equipment proposed in this embodiment includes a water tank 1, which is equipped with a motor water cooling unit 4 and several oil water cooling units 5. The motor water cooling unit 4 and several oil water cooling units 5 are respectively connected to a central processing unit 2 through signal lines. The central processing unit 2 is also connected to a temperature sensor unit 3 through signal lines.

[0028] Example 2 like Figure 1As shown, the internal circulating water cooling system of the electric cementing equipment proposed in this embodiment includes a water tank 1, which contains a motor water cooling unit 4 and several oil water cooling units 5. The motor water cooling unit 4 and the several oil water cooling units 5 are respectively connected to a central processing unit 2 via signal lines. The central processing unit 2 is also connected to a temperature sensor unit 3 via signal lines. The motor water cooling unit 4 includes a motor water cooling submersible pump 401, which contains a first drive motor. The outer shell of the motor water cooling submersible pump 401 is fixed to the bottom of the water tank 1. The input end of the motor water cooling submersible pump 401 is connected to the inner cavity of the water tank 1. The output end of the motor water cooling submersible pump 401 is connected to a filter 402 via a pipe. The other end of the filter 402 is connected to a proportional multi-way flow valve 403 via a pipe. The proportional multi-way flow valve 403 has a first outlet and a second outlet. Each of the first and second outlets is equipped with a valve plate. The first outlet is connected to the main motor heat exchanger 404, and the other end of the main motor heat exchanger 404 is connected to the first inlet. The second outlet is connected to the auxiliary motor heat exchanger 405, and the other end of the auxiliary motor heat exchanger 405 is connected to the second inlet. The first and second inlets are connected to the output of a proportional multi-way flow valve, which communicates with the inner cavity of the water tank 1. The first and second inlets are each equipped with a motor water-cooled unit flow sensor 406, which is connected to the central processing unit 2 via signal lines. The first drive motor is also connected to the central processing unit 2 via a signal line. The proportional multi-way flow valve 403 is also connected to the central processing unit 2 via a signal line.

[0029] Example 3 like Figure 1As shown, the internal circulating water cooling system of the electric cementing equipment proposed in this embodiment includes a water tank 1, which contains a motor water cooling unit 4 and several oil water cooling units 5. The motor water cooling unit 4 and the several oil water cooling units 5 are respectively connected to a central processing unit 2 via signal lines. The central processing unit 2 is also connected to a temperature sensor unit 3 via signal lines. The motor water cooling unit 4 includes a motor water cooling submersible pump 401, which contains a first drive motor. The outer shell of the motor water cooling submersible pump 401 is fixed to the bottom of the water tank 1. The input end of the motor water cooling submersible pump 401 is connected to the inner cavity of the water tank 1. The output end of the motor water cooling submersible pump 401 is connected to a filter 402 via a pipe. The other end of the filter 402 is connected to a proportional multi-way flow valve 403 via a pipe. The proportional multi-way flow valve 403 has a first outlet and a second outlet. Each of the first and second outlets is equipped with a valve plate. The first outlet is connected to the main motor heat exchanger 404, and the other end of the main motor heat exchanger 404 is connected to the first inlet. The second outlet is connected to the auxiliary motor heat exchanger 405, and the other end of the auxiliary motor heat exchanger 405 is connected to the second inlet. The first and second inlets are connected to the output of a proportional multi-way flow valve, which communicates with the inner cavity of the water tank 1. The first and second inlets are each equipped with a motor water-cooled unit flow sensor 406, which is connected to the central processing unit 2 via signal lines. The first drive motor is also connected to the central processing unit 2 via a signal line. The proportional multi-way flow valve 403 is also connected to the central processing unit 2 via a signal line. The oil-water cooling unit 5 includes an oil-water cooling submersible pump 501, which has a second drive motor inside. The outer casing of the oil-water cooling submersible pump 501 is fixed to the bottom of the water tank 1. The input end of the oil-water cooling submersible pump 501 is connected to the inner cavity of the water tank 1. The output end of the oil-water cooling submersible pump 501 is connected to the inlet of the oil-water cooling radiator 502 through a pipe. The outlet of the oil-water cooling radiator 502 is connected to the inner cavity of the water tank 1. It also includes a hydraulic oil inlet pipe. One end of the hydraulic oil inlet pipe is connected to a three-way thermostatic valve 503. The other two ports of the three-way thermostatic valve 503 are respectively connected to the first return oil pipeline and the oil inlet of the oil-water cooling radiator 502 through pipelines. An oil-water cooling unit flow sensor 504 is installed between the three-way thermostatic valve 503 and the oil-water cooling radiator 502. The oil outlet of the oil-water cooling radiator 502 is connected to the second return oil pipeline through a pipeline.

[0030] Example 4 like Figure 1As shown, the internal circulating water cooling system of the electric cementing equipment proposed in this embodiment includes a water tank 1, which contains a motor water cooling unit 4 and several oil water cooling units 5. The motor water cooling unit 4 and the several oil water cooling units 5 are respectively connected to a central processing unit 2 via signal lines. The central processing unit 2 is also connected to a temperature sensor unit 3 via signal lines. The motor water cooling unit 4 includes a motor water cooling submersible pump 401, which contains a first drive motor. The outer shell of the motor water cooling submersible pump 401 is fixed to the bottom of the water tank 1. The input end of the motor water cooling submersible pump 401 is connected to the inner cavity of the water tank 1. The output end of the motor water cooling submersible pump 401 is connected to a filter 402 via a pipe. The other end of the filter 402 is connected to a proportional multi-way flow valve 403 via a pipe. The proportional multi-way flow valve 403 has a first outlet and a second outlet. Each of the first and second outlets is equipped with a valve plate. The first outlet is connected to the main motor heat exchanger 404, and the other end of the main motor heat exchanger 404 is connected to the first inlet. The second outlet is connected to the auxiliary motor heat exchanger 405, and the other end of the auxiliary motor heat exchanger 405 is connected to the second inlet. The first and second inlets are connected to the output of a proportional multi-way flow valve, which communicates with the inner cavity of the water tank 1. The first and second inlets are each equipped with a motor water-cooled unit flow sensor 406, which is connected to the central processing unit 2 via signal lines. The first drive motor is also connected to the central processing unit 2 via a signal line. The proportional multi-way flow valve 403 is also connected to the central processing unit 2 via a signal line. The oil-water cooling unit 5 includes an oil-water cooling submersible pump 501, which has a second drive motor inside. The outer casing of the oil-water cooling submersible pump 501 is fixed to the bottom of the water tank 1. The input end of the oil-water cooling submersible pump 501 is connected to the inner cavity of the water tank 1. The output end of the oil-water cooling submersible pump 501 is connected to the inlet of the oil-water cooling radiator 502 through a pipe. The outlet of the oil-water cooling radiator 502 is connected to the inner cavity of the water tank 1. It also includes a hydraulic oil inlet pipe. One end of the hydraulic oil inlet pipe is connected to a three-way thermostatic valve 503. The other two ports of the three-way thermostatic valve 503 are respectively connected to the first return oil pipeline and the oil inlet of the oil-water cooling radiator 502 through pipelines. An oil-water cooling unit flow sensor 504 is installed between the three-way thermostatic valve 503 and the oil-water cooling radiator 502. The oil outlet of the oil-water cooling radiator 502 is connected to the second return oil pipeline through a pipeline. The flow sensor 504 of the oil-water cooling unit is connected to the central processing unit 2 via a signal line, and the second drive motor is also connected to the central processing unit 2 via a signal line.

[0031] Example 5 like Figure 1As shown, the internal circulating water cooling system of the electric cementing equipment proposed in this embodiment includes a water tank 1, which contains a motor water cooling unit 4 and several oil water cooling units 5. The motor water cooling unit 4 and the several oil water cooling units 5 are respectively connected to a central processing unit 2 via signal lines. The central processing unit 2 is also connected to a temperature sensor unit 3 via signal lines. The motor water cooling unit 4 includes a motor water cooling submersible pump 401, which contains a first drive motor. The outer shell of the motor water cooling submersible pump 401 is fixed to the bottom of the water tank 1. The input end of the motor water cooling submersible pump 401 is connected to the inner cavity of the water tank 1. The output end of the motor water cooling submersible pump 401 is connected to a filter 402 via a pipe. The other end of the filter 402 is connected to a proportional multi-way flow valve 403 via a pipe. The proportional multi-way flow valve 403 has a first outlet and a second outlet. Each of the first and second outlets is equipped with a valve plate. The first outlet is connected to the main motor heat exchanger 404, and the other end of the main motor heat exchanger 404 is connected to the first inlet. The second outlet is connected to the auxiliary motor heat exchanger 405, and the other end of the auxiliary motor heat exchanger 405 is connected to the second inlet. The first and second inlets are connected to the output of a proportional multi-way flow valve, which communicates with the inner cavity of the water tank 1. The first and second inlets are each equipped with a motor water-cooled unit flow sensor 406, which is connected to the central processing unit 2 via signal lines. The first drive motor is also connected to the central processing unit 2 via a signal line. The proportional multi-way flow valve 403 is also connected to the central processing unit 2 via a signal line. The oil-water cooling unit 5 includes an oil-water cooling submersible pump 501, which has a second drive motor inside. The outer casing of the oil-water cooling submersible pump 501 is fixed to the bottom of the water tank 1. The input end of the oil-water cooling submersible pump 501 is connected to the inner cavity of the water tank 1. The output end of the oil-water cooling submersible pump 501 is connected to the inlet of the oil-water cooling radiator 502 through a pipe. The outlet of the oil-water cooling radiator 502 is connected to the inner cavity of the water tank 1. It also includes a hydraulic oil inlet pipe. One end of the hydraulic oil inlet pipe is connected to a three-way thermostatic valve 503. The other two ports of the three-way thermostatic valve 503 are respectively connected to the first return oil pipeline and the oil inlet of the oil-water cooling radiator 502 through pipelines. An oil-water cooling unit flow sensor 504 is installed between the three-way thermostatic valve 503 and the oil-water cooling radiator 502. The oil outlet of the oil-water cooling radiator 502 is connected to the second return oil pipeline through a pipeline. The oil-water-cooled unit flow sensor 504 is connected to the central processing unit 2 via a signal line, and the second drive motor is also connected to the central processing unit 2 via a signal line. The temperature sensor unit 3 includes a motor-water-cooled temperature sensor, which is located at the output end of the proportional multi-way flow valve.

[0032] Example 6 like Figure 1As shown in the figure, the method for heat dissipation using an internal circulating water cooling system in an electrically driven cementing device proposed in this embodiment specifically includes the following steps: S1. Start the motor water cooling unit 4; the specific steps are as follows: when the temperature detected by the motor water cooling temperature sensor is greater than or equal to the control temperature, the central processing unit 2 issues a start command to the first drive motor. The water in the water tank 1 enters the motor water cooling submersible pump 401 and is filtered by the filter 402 before entering the proportional multi-way flow valve 403. The valve opening degree of the first branch outlet and the second branch outlet of the proportional multi-way flow valve 403 is related to the required cooling water flow rate of the first drive motor. When the temperature detected by the motor water cooling temperature sensor is higher than the set temperature, the central processing unit 2 issues a command to the proportional multi-way flow valve 403 to increase the opening of the corresponding valve plate and increase the cooling water flow rate of that branch. Then the water flows into the main motor heat exchanger 404 and the auxiliary motor heat exchanger 405 for heat exchange. Finally, the water flows out of the output end of the proportional multi-way flow valve and into the water tank 1.

[0033] S2. When the return oil temperature of the hydraulic oil is greater than or equal to the control temperature of the three-way thermostatic valve 503, the central processing unit 2 issues a start command to the second drive motor. The water in the water tank 1 enters the oil-cooled submersible pump 501, passes through the oil-cooled radiator 502 for heat exchange, and is then discharged into the water tank 1. The hydraulic oil flowing into the three-way thermostatic valve 503 enters the oil-cooled radiator 502 and is then discharged through the hydraulic oil outlet pipe. When the return oil temperature of the hydraulic oil is less than the control temperature of the three-way thermostatic valve 503, the hydraulic oil is discharged through the first return oil pipe.

Claims

1. An internal circulating water cooling system for electrically driven cementing equipment, characterized in that, It includes a water tank (1), which is equipped with a motor water cooling unit (4) and several oil water cooling units (5). The motor water cooling unit (4) and several oil water cooling units (5) are respectively connected to a central processing unit (2) via signal lines. The central processing unit (2) is also connected to a temperature sensor unit (3) via signal lines.

2. The internal circulating water cooling system for the electric cementing equipment according to claim 1, characterized in that, The motor water-cooling unit (4) includes a motor water-cooled submersible pump (401). The motor water-cooled submersible pump (401) has a first drive motor inside. The outer shell of the motor water-cooled submersible pump (401) is fixed to the bottom of the water tank (1). The input end of the motor water-cooled submersible pump (401) is connected to the inner cavity of the water tank (1). The output end of the motor water-cooled submersible pump (401) is connected to a filter (402) through a pipe. The other end of the filter (402) is connected to a proportional multi-way flow valve (403) through a pipe. The proportional multi-way flow valve (403) has a first branch. The first branch outlet and the second branch outlet are equipped with valve plates. The first branch outlet is connected to the main motor heat exchanger (404). The other end of the main motor heat exchanger (404) is connected to the first branch inlet. The second branch outlet is connected to the auxiliary motor heat exchanger (405). The other end of the auxiliary motor heat exchanger (405) is connected to the second branch inlet. The first branch inlet and the second branch inlet are connected to the output end of the proportional multi-way flow valve. The output end of the proportional multi-way flow valve is connected to the inner cavity of the water tank (1).

3. The circulating water cooling system for the electric cementing equipment according to claim 2, characterized in that, The first inlet and the second inlet are respectively equipped with motor water-cooled unit flow sensors (406), and the two motor water-cooled unit flow sensors (406) are connected to the central processing unit (2) through signal lines; the first drive motor is connected to the central processing unit (2) through signal lines; the proportional multi-way flow valve (403) is connected to the central processing unit (2) through signal lines.

4. The internal circulating water cooling system for the electric cementing equipment according to claim 3, characterized in that, The oil-water cooling unit (5) includes an oil-water cooling submersible pump (501). The oil-water cooling submersible pump (501) has a second drive motor inside. The outer casing of the oil-water cooling submersible pump (501) is fixed to the bottom of the water tank (1). The input end of the oil-water cooling submersible pump (501) is connected to the inner cavity of the water tank (1). The output end of the oil-water cooling submersible pump (501) is connected to the inlet of an oil-water cooling radiator (502) via a pipe. The outlet of the oil-water cooling radiator (502) is connected to the... The inner cavity of the water tank (1) is connected; it also includes a hydraulic oil inlet pipe, one end of which is connected to a three-way thermostatic valve (503), the other two ports of which are respectively connected to the first return oil pipeline and the oil inlet of the oil-water cooling radiator (502) through pipelines, an oil-water cooling unit flow sensor (504) is provided between the three-way thermostatic valve (503) and the oil-water cooling radiator (502), and the oil outlet of the oil-water cooling radiator (502) is connected to the second return oil pipeline through a pipeline.

5. The circulating water cooling system for the electric cementing equipment according to claim 4, characterized in that, The flow sensor (504) of the oil-water cooling unit is connected to the central processing unit (2) via a signal line, and the second drive motor is connected to the central processing unit (2) via a signal line.

6. The circulating water cooling system for the electric cementing equipment according to claim 5, characterized in that, The temperature sensor unit (3) includes a motor water-cooled temperature sensor, which is located at the output end of the proportional multi-way flow valve.

7. A method for heat dissipation using the internal circulating water cooling system of the electrically driven cementing equipment as described in claim 6, characterized in that, Specifically, the steps include the following: S1. Start the motor water cooling unit (4); S2. When the return oil temperature of the hydraulic oil is greater than or equal to the control temperature of the three-way temperature control valve (503), the central processing unit (2) issues a start command to the second drive motor. The water in the water tank (1) enters the oil-cooled submersible pump (501) and then passes through the oil-cooled radiator (502) for heat exchange before being discharged into the water tank (1). The hydraulic oil flowing into the three-way temperature control valve (503) enters the oil-cooled radiator (502) and is discharged through the hydraulic oil outlet pipe. When the return oil temperature of the hydraulic oil is less than the control temperature of the three-way temperature control valve (503), the hydraulic oil is discharged through the first return oil pipeline.

8. The method for heat dissipation using the internal circulating water cooling system of the electrically driven cementing equipment according to claim 7, characterized in that, The specific steps of S1 are as follows: When the temperature detected by the motor water-cooling temperature sensor is greater than or equal to the control temperature, the central processing unit (2) issues a start command to the first drive motor. The water in the water tank (1) enters the motor water-cooling submersible pump (401), is filtered by the filter (402), and then enters the proportional multi-way flow valve (403). The valve plate opening of the first branch outlet and the second branch outlet of the proportional multi-way flow valve (403) is related to the required cooling water flow of the first drive motor. When the temperature detected by the motor water-cooling temperature sensor is higher than the set temperature, the central processing unit (2) issues a command to the proportional multi-way flow valve (403) to increase the opening of the corresponding valve plate and increase the cooling water flow of the branch. Then the water flows into the main motor heat exchanger (404) and the auxiliary motor heat exchanger (405) for heat exchange. Finally, the water flows out of the output end of the proportional multi-way flow valve and into the water tank (1).

Images