A water suction pump for extracting perfluorohexanone

Abstract

The utility model belongs to fire safety technical field, concretely is a kind of water pump for extracting perfluorocyclohexanone. Including pump body, the impeller, helical cooling water pipeline and pivot are equipped in pump body, and pump body is connected water inlet pipe and water outlet pipe respectively;Motor, the motor drive pivot, and motor side connects terminal box;Water suction subassembly, the water suction subassembly includes pivot and water suction part, and the water suction part is coaxially installed on pivot with impeller, wherein pivot positive rotation drives water suction subassembly to establish pump body negative pressure, and reverse rotation drives impeller to pump liquid;Control component, the control component includes control module and the temperature sensor, pressure sensor, liquid level sensor integrated with pump body, and the control module controls motor forward and reverse according to sensor signal;The cooling water pipeline forms closed loop cooling system by cooling liquid water inlet and water outlet.

Description

Technical Field

[0001] This utility model belongs to the field of fire safety technology, specifically a water pump for extracting perfluorohexanone. Background Technology

[0002] In the field of fire safety technology, with the increasing demands for fire prevention and control, the search for efficient, environmentally friendly, and safe fire extinguishing agents has become an important research direction. Perfluorohexanone, as a highly promising alternative to halon fire extinguishing agents, has emerged as a result.

[0003] Perfluorohexanone (PFH) possesses numerous superior properties, including low extinguishing concentration, high extinguishing efficiency, high safety margin, non-conductivity, and no residue, giving it unique advantages in fire suppression applications. In the field of fire-retardant coatings, adding PPH significantly enhances the coating's fire extinguishing performance and strengthens its ability to control the spread of fire, thus better protecting people's lives and property. However, the special properties of PPH present challenges in its transportation process. Due to its chemical reactivity, materials in ordinary water pumps may react with it, leading to corrosion and damage to pump components, affecting the pump's service life and operational reliability. Its low boiling point makes it prone to vaporization during transportation due to frictional heat generation, interfering with the normal operation of the water pump and causing problems such as unstable flow and abnormal pressure. Furthermore, PPH's low viscosity and low surface tension increase the risk of cavitation in water pumps, further affecting equipment performance and lifespan. Moreover, PPH may be harmful to human health under certain conditions; leaks can cause environmental pollution and endanger the safety of operators. Therefore, there is an urgent need for a water pump specifically designed for the delivery of perfluorohexanone, to ensure that the extraction and delivery tasks can be completed safely and efficiently during use, and to meet the needs of the fire safety field for the application of perfluorohexanone. Summary of the Invention

[0004] To solve the above problems, this utility model provides a water pump for extracting perfluorohexanone.

[0005] This utility model adopts the following technical solution: a water pump for conveying perfluorohexanone, comprising:

[0006] The pump body is equipped with a water suction component and a spiral cooling water pipe inside. The pump body is connected to the inlet pipe and the outlet pipe respectively.

[0007] The motor drives the water-absorbing assembly, and a junction box is connected to one side of the motor;

[0008] The control component includes a control module and a temperature sensor, pressure sensor, and liquid level sensor integrated into the pump body. The control module controls the forward and reverse rotation of the motor based on the sensor signals.

[0009] The cooling water pipes form a closed-loop cooling system through the coolant inlet and outlet.

[0010] In some embodiments, the absorbent component includes:

[0011] case;

[0012] The drive wheel is housed inside the housing and is connected to the output shaft of the motor via a rotating shaft and a one-way bearing. The one-way bearing is located between the rotating shaft and the drive wheel.

[0013] Driven wheel, which meshes with driving wheel;

[0014] When rotating in the forward direction, the driving gear drives the driven gear to create a vacuum suction, and when rotating in the reverse direction, the one-way bearing rotates freely, thereby realizing the pumping of liquid.

[0015] In some embodiments, a filter device is provided at the end of the inlet pipe, and a one-way valve is provided at the outlet pipe.

[0016] In some embodiments, the filtration device is a multi-layer metal filter structure, comprising an 80-120 mesh coarse filter layer and a 200-300 mesh fine filter layer.

[0017] In some embodiments, the spiral spacing of the cooling water pipe gradually decreases along the fluid direction, and the inner wall of the cooling water pipe is provided with a turbulent protrusion structure.

[0018] In some embodiments, the control module is configured with:

[0019] First control mode: When the level sensor detects that the liquid level in the pump body is lower than the set value, the motor is started to rotate in the forward direction to establish negative pressure for liquid suction.

[0020] Second control mode: When the liquid level reaches the set value, the motor reverses to drive the impeller pump;

[0021] Third safety mode: When the temperature exceeds 60℃ or the pressure exceeds 1.2MPa, the shutdown protection is triggered.

[0022] In some embodiments, the junction box integrates a frequency converter driver, which can realize stepless speed regulation of the motor within the range of 500-3000 rpm.

[0023] In some embodiments, the pump body has guide ribs on its inner wall, and the height of the ribs decreases along the fluid direction to form a gradually narrowing flow channel.

[0024] In some embodiments, a temperature sensor is installed on the inner wall of the pump body to monitor the cooling water temperature; a pressure sensor is installed on the outlet pipe to monitor the pumping pressure; and a level sensor is installed at the bottom of the pump body to monitor the liquid level inside the pump body.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This utility model relates to a water pump designed specifically for the physical properties of perfluorohexanone. A cooling system is added to prevent overheating and vaporization of perfluorohexanone during use. A more corrosion-resistant polytetrafluoroethylene (PTFE) material is used internally to prevent corrosion. The pump's sealing device is optimized to maintain the internal pressure environment and ensure normal operation, preventing perfluorohexanone leakage and pollution. This water pump can extract perfluorohexanone and inject it into various liquids, facilitating the preparation of composite materials and improving material safety, such as in fire-retardant coatings. Attached Figure Description

[0027] Figure 1 This is a simplified diagram of the water pump principle.

[0028] Figure 2 This is a schematic diagram of the main body of the water pump;

[0029] Figure 3 This is a cross-sectional view of the water pump body;

[0030] Figure 4 This is a schematic diagram of the water absorption component;

[0031] Figure 5 Detailed image of the inlet filter screen;

[0032] Figure 6 Detailed diagram of the one-way valve at the water outlet;

[0033] In the diagram: 1-Motor; 2-Pump body; 3-Outlet pipe; 4-Gateway box; 5-Coolant outlet; 6-Coolant inlet; 7-Inlet pipe; 21-Suction assembly; 22-Cooling water pipe; 211-Drive wheel; 212-Driven wheel; 213-Shaft; 214-One-way bearing; 31-Outlet check valve; 71-Inlet filter. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] Perfluorohexanone is an important alternative to halon fire extinguishing agents. It features low extinguishing concentration, high extinguishing efficiency, high safety margin, non-conductivity, and no residue. At room temperature, it is a colorless, transparent liquid with a characteristic odor. Its boiling point is 48.2℃, its freezing point is -108℃, and its density is 1.6 g / cm³ (25℃). It is slightly soluble in water but soluble in organic solvents such as ethanol and ether. It is chemically stable and does not readily react with other substances. Adding perfluorohexanone to fire-retardant coatings can enhance their fire-extinguishing performance, improve their safety, better control the spread of fire, and protect people's lives and property.

[0036] Due to the special properties of perfluorohexanone, when using a water pump to extract perfluorohexanone, it is necessary to take into account its chemical stability, low boiling point, low viscosity, low surface tension, and corrosiveness, and to design and modify the water pump accordingly to ensure the safe and efficient delivery of perfluorohexanone.

[0037] like Figure 2 As shown, a water pump for conveying perfluorohexanone includes:

[0038] Pump body 2, the pump body 2 is provided with a water suction component 21 and a spiral cooling water pipe 22 inside, and the pump body 2 is connected to the water inlet pipe 7 and the water outlet pipe 3 respectively;

[0039] Motor 1 drives water absorption assembly 21, and junction box 4 is connected to one side of motor 1;

[0040] The control component includes a control module and a temperature sensor, pressure sensor, and liquid level sensor integrated in the pump body 2. The control module controls the forward and reverse rotation of the motor 1 according to the sensor signals.

[0041] The control component includes a control module and a temperature sensor, pressure sensor, and liquid level sensor integrated in the pump body 2. The control module controls the forward and reverse rotation of the motor 1 according to the sensor signals.

[0042] The cooling water pipe 22 forms a closed-loop cooling system through the coolant inlet 6 and outlet 5. Cooling water enters the spiral cooling water pipe 22 through the coolant inlet 6, absorbs heat from the pump body, and is discharged through the outlet 5, forming a closed-loop circulation system. When the motor starts, the cooling device starts simultaneously. The cooling water pipe spirals inside the pump body 2, and the circulating coolant carries away the heat, preventing the pump body and motor from overheating and causing perfluorohexanone vaporization. This maintains the pump body and motor within a suitable temperature range, ensuring stable pump performance and extending the equipment's service life.

[0043] Specifically, pump body 2 is made of high-strength stainless steel, and its internal cavity is precision machined to ensure a surface smoothness of Ra0.4μm. Pump body 2 uses fluororubber sealing rings to enhance the sealing effect and further prevent liquid or gas leakage at the joints of various components.

[0044] The sealing device includes a mechanical seal and a sealing ring: the mechanical seal is installed at the connection between the motor shaft and the pump body to prevent perfluorohexanone from leaking from this part, while also preventing external air, moisture and other impurities from entering the pump body; the sealing ring is installed at different sealing parts, such as the connection between the pump body and other components, the inlet and outlet, etc., and fills the tiny gaps in the connection parts through its elastic deformation, providing reliable sealing protection, maintaining the pressure environment inside the pump body and ensuring the normal operation of the water pump.

[0045] like Figure 3 As shown, the pump body 2 integrates the following key components:

[0046] 1. Water absorption assembly 21: includes a housing; a drive wheel 211, which is disposed inside the housing and connected to the output shaft of the motor 1 via a rotating shaft 213 and a one-way bearing 214, the one-way bearing 214 being disposed between the rotating shaft 213 and the drive wheel 211; and a driven wheel 212, which meshes with the drive wheel 211; when rotating in the forward direction, the drive wheel 211 drives the driven wheel 212 to form a vacuum suction, and when rotating in the reverse direction, the one-way bearing rotates freely, thereby realizing the pumping of liquid.

[0047] Shaft 213: The shaft is made of 42CrMo alloy steel, and the surface is nitrided to achieve a hardness of HRC58-62. Both ends of the shaft are equipped with a three-stage mechanical seal structure, with the sealing surface gap controlled within the range of 0.02-0.05mm, and perfluoropolyether grease is injected through the grease injection hole.

[0048] 2. Spiral Cooling Water Pipe 22: The cooling water pipe is arranged in a spiral shape, and the inner wall of the pipe is provided with a turbulent protrusion structure with a height of 0.5-1mm, which effectively improves the cooling efficiency. The spiral spacing of the pipe gradually decreases along the fluid flow direction, with an initial spacing of 20mm and an end spacing of 10mm.

[0049] Motor 1 is an AC asynchronous motor with a rated power of 3kW and a rated voltage of 380V. The motor directly drives the shaft 213 via a coupling. A junction box 4 is installed on one side of the motor, which integrates a frequency converter driver, enabling stepless adjustment of the motor speed within the range of 500-3000rpm.

[0050] A filter device 71 is installed at the end of the inlet pipe 7. Before entering the pump body, perfluorohexanone passes through the filter device at the end of the inlet, and impurities are filtered out to prevent it from entering the pump body and causing blockage or damage. A one-way valve 31 is installed in the outlet pipe 3 (to effectively prevent backflow and damage to the pump body).

[0051] The filter device 71 has a multi-layer metal filter structure, including an 80-120 mesh coarse filter layer and a 200-300 mesh fine filter layer.

[0052] Filter device 71: The filter device is installed at the end of the inlet pipe 7 and adopts a multi-layer metal filter screen structure. The filter screen consists of two layers:

[0053] Coarse filter layer: 80-120 mesh, used to intercept larger particulate impurities.

[0054] Fine filter layer: 200-300 mesh, used for further purification of liquid.

[0055] The spiral spacing of the cooling water pipe 22 gradually decreases along the fluid direction, and the inner wall of the cooling water pipe 22 is provided with a turbulent protrusion structure.

[0056] The control components include the following parts:

[0057] sensor:

[0058] - Temperature sensor: Installed on the inner wall of pump body 2 to monitor the cooling water temperature;

[0059] - Pressure sensor: Installed on outlet pipe 3 to monitor pump pressure;

[0060] - Liquid level sensor: Installed at the bottom of pump body 2 to monitor the liquid level inside the pump body.

[0061] Control Module: The control module uses an ARM Cortex-M series microcontroller as its core and is configured with the following functions:

[0062] - First control mode: When the liquid level sensor detects that the liquid level in the pump body is lower than the set value (default is 1 / 3 of the pump body height), the control module outputs a signal to make the motor rotate in the forward direction, establish negative pressure in the pump body to achieve vacuum suction.

[0063] - Second control mode: When the liquid level sensor detects that the liquid level has reached the set value (default is 2 / 3 of the pump body height), the control module switches the motor to reverse and drives the impeller 21 to pump the liquid.

[0064] - Third Safety Mode: During operation, the temperature sensor monitors the temperature of the pump body and motor in real time, and the pressure sensor monitors the pressure inside the pump body. Once the temperature or pressure exceeds the normal range, the control module will issue an alarm signal and take corresponding measures according to the preset program, such as adjusting the motor speed or stopping the machine. Specifically, when the temperature sensor detects a temperature exceeding 60°C or the pressure sensor detects a pressure exceeding 1.2 MPa, the control module immediately cuts off the motor power supply and issues an alarm signal through indicator lights and a buzzer.

[0065] The pump body 2 has guide ribs on its inner wall, with the rib height decreasing along the fluid direction to form a gradually narrowing flow channel. This design can effectively reduce flow resistance and improve pumping efficiency.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A water pump for extracting perfluorohexanone, characterized in that, include: Pump body (2), the pump body (2) is provided with a water suction component (21) and a spiral cooling water pipe (22) inside, and the pump body (2) is connected to the inlet pipe (7) and the outlet pipe (3) respectively. Motor (1), which drives water absorption assembly (21), and a junction box (4) is connected to one side of the motor (1); The control component includes a control module and a temperature sensor, pressure sensor and liquid level sensor integrated in the pump body (2). The control module controls the motor (1) to rotate forward and backward according to the sensor signals. The cooling water pipe (22) forms a closed-loop cooling system through the coolant inlet (6) and outlet (5).

2. The water pump for extracting perfluorohexanone according to claim 1, characterized in that, The water-absorbing component (21) includes: case; The drive wheel (211) is located inside the housing and is connected to the output shaft of the motor (1) via a rotating shaft (213) and a one-way bearing (214). The one-way bearing (214) is located between the rotating shaft (213) and the drive wheel (211). Driven wheel (212), which meshes with driving wheel (211); When rotating in the forward direction, the driving wheel (211) drives the driven wheel (212) to form a vacuum suction. When rotating in the reverse direction, the one-way bearing rotates freely, thereby realizing the pumping of liquid.

3. The water pump for extracting perfluorohexanone according to claim 1, characterized in that, The inlet pipe (7) is equipped with a filter device (71) at the end, and the outlet pipe (3) is equipped with a one-way valve (31).

4. The water pump for extracting perfluorohexanone according to claim 3, characterized in that, The filtration device (71) has a multi-layer metal filter structure, including an 80-120 mesh coarse filter layer and a 200-300 mesh fine filter layer.

5. The water pump for extracting perfluorohexanone according to claim 1, characterized in that, The spiral spacing of the cooling water pipe (22) gradually decreases along the fluid direction, and the inner wall of the cooling water pipe (22) is provided with a turbulent protrusion structure.

6. The water pump for extracting perfluorohexanone according to claim 1, characterized in that, The control module is configured with: First control mode: When the level sensor detects that the liquid level in the pump body is lower than the set value, the motor is started to rotate in the forward direction to establish negative pressure for liquid suction. Second control mode: When the liquid level reaches the set value, the motor reverses to drive the impeller pump; Third safety mode: When the temperature exceeds 60℃ or the pressure exceeds 1.2MPa, the shutdown protection is triggered.

7. The water pump for extracting perfluorohexanone according to claim 1, characterized in that, The junction box (4) integrates a frequency converter driver, which can realize stepless speed regulation of the motor within the range of 500-3000rpm.

8. The water pump for extracting perfluorohexanone according to claim 1, characterized in that, The pump body (2) has a flow guide rib on its inner wall, and the height of the rib decreases along the fluid direction to form a gradually narrowing flow channel.

9. The water pump for extracting perfluorohexanone according to claim 1, characterized in that, The temperature sensor is installed on the inner wall of the pump body (2) to monitor the cooling water temperature; the pressure sensor is installed on the outlet pipe (3) to monitor the pumping pressure; the liquid level sensor is installed at the bottom of the pump body (2) to monitor the liquid level in the pump body.

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