Four-stage high-pressure relay fire pump

Abstract

The utility model relates to the technical field of fire fighting equipment, and discloses a four-stage high-pressure relay fire pump which comprises a pump body, a pump head and an electric control assembly. A driving mechanism and a transmission mechanism are arranged in the pump body, and the output end of the driving mechanism is connected with the transmission mechanism. The pump head comprises a pump head shell, a driving connecting mechanism is arranged at one end of the pump head shell, a water pumping cavity is formed in the pump head shell, and a pump shaft is rotationally arranged in the water pumping cavity and sleeved with at least four impellers. The impeller comprises a circular mounting plate, a center seat is formed in the middle of the mounting plate, a plurality of arc-shaped baffles are circumferentially distributed on the other surface of the mounting plate, and pump blades are arranged on the outer sides of the arc-shaped baffles. The pump head shell is provided with a water inlet and a water outlet which are both communicated with the water pumping cavity. The high-rise building fire-fighting device is reasonable in structural design, water pressure is improved through the four-stage impeller design, the fire-fighting requirement of a high-rise building is met, intelligent monitoring and adjusting are achieved through the electric control assembly, and the fire-fighting rescue efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of fire pump technology, specifically relating to a four-stage high-pressure relay fire pump. Background Technology

[0002] Fire pumps are crucial equipment in fire protection systems, primarily used to provide the water pressure and flow required for firefighting. With increasing building heights and stricter fire safety requirements, the performance demands on fire pumps are also rising. Currently, the most common types of fire pumps on the market include vertical fire pumps, horizontal fire pumps, and multistage fire pumps.

[0003] In the existing technology, there are various design schemes for fire pumps. For example, Chinese patent CN106438389A discloses a constant pressure vertical fire pump, which includes an electric motor and a pump head. The pump head consists of an explosion-proof casing and a base, and a constant pressure centrifugal impeller is sleeved on the pump shaft. Within a certain flow range, the pump head has a quasi-constant pressure characteristic. Chinese patent CN108644124A discloses a dual-power long-shaft fire pump using a new material that inhibits biological growth. Its main components include a fire pump, a power system, a control cabinet, and a water supply pipe. The fire pump is a long-shaft single-stage centrifugal pump.

[0004] In addition, Chinese patent CN202833310U discloses a constant pressure fire pump, including a prime mover and a fire pump head connected to the prime mover. The fire pump head includes a pump cover connected to the prime mover, and the pump cover is connected to the pump body to form a sealed cavity. A constant pressure centrifugal impeller is arranged in the water flow path, and the constant pressure centrifugal impeller is composed of several arc-shaped blades. Chinese patent CN206299578U discloses a constant pressure vertical fire pump, including an electric motor and a fire pump head. A constant pressure centrifugal impeller is sleeved on the pump shaft, and an inlet and an outlet are respectively arranged on both sides of the base.

[0005] Recently, Chinese patent CN220956068U disclosed a multi-outlet multi-pressure fire pump. The motor shaft of the multi-outlet multi-pressure fire pump is set on one side. The motor drives the pump shaft through a coupling to transmit power to several impellers to pressurize the medium. The medium is transported from the suction port to the outlet through several impellers for layer-by-layer pressurization.

[0006] However, existing fire pumps have the following technical problems: First, due to the limitations of the centrifugal pump head structure and engine structure, the pressure of existing high-pressure relay pumps is low during operation, which cannot meet the needs of high-rise buildings or long-distance fire fighting. In particular, in terms of multi-stage impeller design, the impeller structure and arrangement in the existing technology often cannot provide sufficient pressure output, which affects the overall performance of the fire pump [3][5].

[0007] Secondly, because the engine operates at high speeds, it generates significant noise, posing a health risk to operators due to the noise and exhaust fumes. Current technology lacks effective noise and exhaust treatment mechanisms, making this problem particularly pronounced under high-intensity working conditions.

[0008] Third, due to the overall structure of the equipment, the pressure gauge, speed display, and electrical control system are located in different parts of the equipment, making it impossible to monitor them simultaneously during use. This makes it difficult for operators to fully grasp the equipment's operating status, affecting the efficiency and safety of the fire pump. Existing technology lacks integrated electrical control component design, making real-time data monitoring and wireless transmission impossible, and failing to meet the development needs of modern intelligent and information-based fire protection equipment.

[0009] Therefore, there is an urgent need for a high-pressure relay fire pump with optimized structure, higher pressure, lower noise, and integrated electrical control system to solve the above-mentioned technical problems. Utility Model Content

[0010] In order to solve the technical problems of existing high-pressure relay pumps, such as low pressure, high noise, and inconvenient operation, and to achieve the technical effects of increasing water pressure, reducing noise damage, and reducing exhaust gas pollution, this invention provides a four-stage high-pressure relay fire pump.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A four-stage high-pressure relay fire pump includes: a pump body, wherein a drive mechanism and a transmission mechanism are disposed inside the pump body, and the output end of the drive mechanism is connected to the transmission mechanism; a pump head, including a pump head shell, wherein a drive connection mechanism is disposed at one end of the pump head shell, a pump water chamber is formed inside the pump head shell, a pump shaft is rotatably disposed inside the pump water chamber, the drive connection mechanism is coaxially connected to the pump shaft, an inlet is disposed at the end of the pump head shell away from the drive connection mechanism, and an outlet is opened on the side wall of the pump head shell near the drive connection mechanism, both the inlet and the outlet communicating with the pump water chamber; at least four impellers are sleeved on the pump shaft. The impeller includes a circular mounting plate with a central seat formed in the center. A connecting hole is formed in the center of one surface of the central seat, which mates with the pump shaft. A plurality of arc-shaped baffles are arranged circumferentially around the center of the mounting plate on the other surface. The arc-shaped baffles have the same center and a water passage is provided between adjacent arc-shaped baffles. Pump blades are arranged on the outer side of the arc-shaped baffles in a circular array around the center of the mounting plate. A drive connection mechanism is connected to the output end of a transmission mechanism. An electronic control component is installed inside the pump body to detect working data and wirelessly transmit data and control commands.

[0013] The working process and principle of the above structure are as follows:

[0014] When the fire pump is working, the drive mechanism generates power, and the drive connection mechanism transmits the power of the transmission mechanism to the pump shaft. The pump shaft drives four impellers to rotate, generating negative pressure. Water flows into the pump chamber from the inlet and first contacts the surface of the mounting plate. During the rotation of the pump blades, turbulence is generated, creating suction. Water inside the arc-shaped baffle is discharged to the outside through the water passage. Due to the narrow water passage, a greater water pressure can be generated. After being pumped by four stages of impellers, the pressurized water is discharged from the outlet. By improving the structure of the pump head impeller, four-stage pressurization is achieved, which can generate greater water pressure and better meet the actual use needs. The speed and water pressure data of the fire pump during operation are transmitted to a remote terminal through the electrical control components. Firefighters can control the pump speed according to the data displayed on the remote terminal without having to operate around the fire pump, thus avoiding noise damage to the human body.

[0015] Furthermore, the drive connection mechanism includes a connecting seat, a drive shaft, and a rotating bearing. The rotating bearing is disposed inside the pump head housing. The connecting seat has a convex cross-section and a connecting through hole in the middle. The end of the drive shaft is fixedly sleeved in the connecting through hole. The outside of the connecting seat is connected to the inner ring of the rotating bearing. The end of the pump shaft is sleeved in the connecting through hole. A flange is formed on the pump shaft, and the flange is connected to the inner ring of the rotating bearing.

[0016] The drive shaft and pump shaft are coaxially connected by a connecting seat, and the connecting seat is also connected to the rotating bearing to ensure smooth rotation. The flange on the pump shaft facilitates direct connection between the pump shaft and the rotating bearing, providing support and ensuring the connection between the pump shaft and the connecting seat. The rotating bearing further limits the connection.

[0017] Furthermore, a sealing ring is provided inside the pump head housing near the rotating bearing, and the inner side of the sealing ring is connected to the pump shaft.

[0018] The sealing ring ensures the airtightness of the pump chamber and prevents water from entering the connection structure.

[0019] Furthermore, the pump shaft has a weight-reducing through hole along its axis.

[0020] The weight-reducing through-hole reduces the weight of the pump shaft. At the same time, when water flows in, it also increases the rotational inertia, making the pump shaft rotate more efficiently.

[0021] Furthermore, the transmission mechanism includes a first transmission turntable and a second transmission turntable, with a connecting shaft connecting the first and second transmission turntables. The connecting shaft does not coincide with the axes of the first and second transmission turntables. The drive mechanism is connected to an output shaft. The first transmission turntable is coaxially connected to the output shaft, and the second transmission turntable is coaxially connected to the drive shaft. An air filter mechanism is provided on the pump body at a position corresponding to the transmission mechanism, and the air filter mechanism is connected to the pump body at the corresponding position.

[0022] By eccentrically setting the first and second transmission turntables and the connecting shaft, a certain negative pressure area can be formed, which facilitates the extraction of exhaust gas generated by the fire pump and its purification before discharge, thereby reducing the generation of exhaust gas.

[0023] Furthermore, the electronic control component includes a speed sensor, a pressure sensor, a wireless transmission antenna, and a frequency converter. The pressure sensor is located at the outlet, the speed sensor is located in the pump body at the position corresponding to the output shaft, the frequency converter is located on one side of the drive mechanism, the signal input terminal of the wireless transmission antenna is connected to the signal output terminals of the speed sensor and the pressure sensor respectively, the signal output terminal of the wireless transmission antenna is connected to the signal input terminal of the frequency converter, and the wireless transmission antenna is located on the pump body.

[0024] The speed sensor detects the speed of the drive mechanism and transmits the data to a remote terminal via a wireless transmission antenna. Based on the speed data and the water pressure data transmitted back by the pressure sensor, the operator can understand the working status of the fire pump and transmit commands to the frequency converter via the wireless transmission antenna to adjust the speed of the drive mechanism.

[0025] Furthermore, the air filtration mechanism includes a negative pressure suction box, an air inlet pipe, and an air filter. The negative pressure suction box is located on the pump body at a position corresponding to the transmission mechanism and is connected to the pump body at the corresponding position. The negative pressure suction box is provided with an air inlet pipe and an air outlet pipe, and the air outlet pipe is connected to the air filter.

[0026] The negative pressure generated by the transmission mechanism draws the waste gas into the negative pressure suction box through the intake pipe, and discharges the waste gas into the air filter through the exhaust pipe, thereby achieving waste gas filtration and cleaning and ensuring the cleanliness of the working environment.

[0027] Beneficial effects: 1. By installing at least four specially structured impellers on the pump shaft, a four-stage pressurization system is formed. Each impeller is equipped with an arc-shaped baffle and pump blades arranged in a circumferential array, so that the water flow can obtain additional pressure boost when passing through each impeller. Compared with the centrifugal pump head structure in the existing technology, it can generate greater water pressure and better meet the high-pressure demand scenarios such as fire rescue.

[0028] 2. By setting up electrical control components, including speed sensors, pressure sensors, wireless transmission antennas, and frequency converters, remote monitoring and control of fire pump operating data are achieved. Firefighters can receive operating parameters such as pump speed and water pressure through a remote terminal and send control commands to adjust the pump's operating status without having to operate the equipment close to it in a high-noise environment, effectively avoiding noise damage to the operator's health.

[0029] 3. By eccentrically setting the connecting shaft between the first and second transmission turntables, a negative pressure area is formed during the operation of the transmission mechanism. In conjunction with the air filtration mechanism consisting of a negative pressure suction box, an air inlet pipe, and an air filter, the exhaust gas generated during equipment operation can be effectively sucked up and filtered, reducing the emission of harmful gases and protecting the health of operators and the surrounding environment.

[0030] 4. By integrating monitoring devices such as speed sensors and pressure sensors into the electronic control components and transmitting data to a remote terminal via wireless transmission technology, the problem of scattered and difficult simultaneous monitoring of various monitoring instruments in traditional equipment is solved, thereby improving the ease of operation and safety of the equipment. Attached Figure Description

[0031] Figure 1 This is a front view of the overall structure of this utility model;

[0032] Figure 2 This is a top view of the overall structure of this utility model;

[0033] Figure 3 This is a front sectional view of the present invention;

[0034] Figure 4 This is a schematic diagram of the internal structure of the pump head in this utility model;

[0035] Figure 5 This is a schematic diagram of the impeller structure in this utility model.

[0036] Reference numerals: 1. Pump body; 101. Drive mechanism; 102. Transmission mechanism; 1021. First transmission turntable; 1022. Second transmission turntable; 1023. Connecting shaft; 1024. Output shaft; 2. Pump head; 201. Pump head housing; 2011. Pump water chamber; 2012. Inlet; 2013. Outlet; 202. Drive connection mechanism; 2021. Connecting seat; 2022. Drive shaft; 2023. Rotary bearing; 2024. Connecting through hole; 203. Pump shaft; 20 31. Flange; 2032. Weight-reducing through hole; 204. Impeller; 2041. Mounting plate; 2042. Center seat; 2043. Connecting hole; 2044. Arc-shaped baffle; 2045. Pump blade; 205. Sealing ring; 3. Electrical control components; 301. Speed ​​sensor; 302. Pressure sensor; 303. Wireless transmission antenna; 304. Frequency converter; 4. Air filtration mechanism; 401. Negative pressure suction box; 402. Inlet pipe; 403. Air filter; 404. Exhaust pipe. Detailed Implementation

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0038] Example 1

[0039] like Figures 1-5 As shown, a four-stage high-pressure relay fire pump includes a pump body 1, a pump head 2, and an electrical control assembly 3.

[0040] The pump body 1 is equipped with a drive mechanism 101 and a transmission mechanism 102. The output end of the drive mechanism 101 is connected to the transmission mechanism 102. The drive mechanism 101 can be an electric motor, which is connected to the transmission mechanism 102 through an output shaft 1024 to provide a power source for the entire fire pump.

[0041] The pump head 2 includes a pump head housing 201, with a drive connection mechanism 202 at one end. A pump water chamber 2011 is formed inside the pump head housing 201, and a pump shaft 203 is rotatably mounted within the pump water chamber 2011. The drive connection mechanism 202 is coaxially connected to the pump shaft 203. An inlet 2012 is located at the end of the pump head housing 201 away from the drive connection mechanism 202, and an outlet 2013 is provided on the side wall of the pump head housing 201 near the drive connection mechanism 202. Both the inlet 2012 and the outlet 2013 communicate with the pump water chamber 2011. Four impellers 204 are mounted on the pump shaft 203. Each impeller 204 includes a circular mounting plate 2041, with a central seat 2042 formed in the center of the mounting plate 2041. A connecting hole 2043 is provided in the center of one surface of the central seat 2042, and the connecting hole 2043 mates with the pump shaft 203. Eight arc-shaped baffles 2044 are arranged circumferentially around the center of the mounting plate 2041 on the other surface of the mounting plate 2041. The arc-shaped baffles 2044 have the same center, and water passages are left between adjacent arc-shaped baffles 2044. Pump blades 2045 are arranged in a circular array around the center of the mounting plate 2041 on the outer side of the arc-shaped baffles 2044. The drive connection mechanism 202 is connected to the output end of the transmission mechanism 102.

[0042] like Figure 4 As shown, the drive connection mechanism 202 includes a connecting seat 2021, a drive shaft 2022, and a rotating bearing 2023. The rotating bearing 2023 is disposed inside the pump head housing 201. The connecting seat 2021 has a convex cross-section and a connecting through hole 2024 in the middle. The end of the drive shaft 2022 is fixedly sleeved in the connecting through hole 2024. The outside of the connecting seat 2021 is connected to the inner ring of the rotating bearing 2023. The end of the pump shaft 203 is sleeved in the connecting through hole 2024. A flange 2031 is formed on the pump shaft 203, and the flange 2031 is connected to the inner ring of the rotating bearing 2023. This structural design allows the drive shaft 2022 to drive the pump shaft 203 to rotate through the connecting seat 2021, while the rotating bearing 2023 reduces friction and improves transmission efficiency.

[0043] like Figure 4 As shown, a sealing ring 205 is provided inside the pump head housing 201 near the rotating bearing 2023, and the inner side of the sealing ring 205 is connected to the pump shaft 203. The sealing ring 205 can effectively prevent water in the pump water chamber 2011 from leaking outward, ensuring the pump's sealing performance.

[0044] like Figure 4 As shown, the pump shaft 203 has a weight-reducing through hole 2032 along its axis. The design of the weight-reducing through hole 2032 can reduce the weight of the pump shaft 203, reduce the moment of inertia of the pump shaft 203, and improve the pump's start-up speed and operating efficiency.

[0045] like Figure 3 As shown, the transmission mechanism 102 includes a first transmission turntable 1021 and a second transmission turntable 1022. A connecting shaft 1023 connects the first transmission turntable 1021 and the second transmission turntable 1022. The connecting shaft 1023 does not coincide with the axes of the first transmission turntable 1021 and the second transmission turntable 1022. The drive mechanism 101 is connected to an output shaft 1024. The first transmission turntable 1021 is coaxially connected to the output shaft 1024, and the second transmission turntable 1022 is coaxially connected to the drive shaft 1022. An air filter mechanism 4 is provided on the pump body 1 at a position corresponding to the transmission mechanism 102, and the air filter mechanism 4 communicates with the pump body 1 at the corresponding position. This transmission structure design can achieve smooth power transmission, reduce mechanical vibration, and extend the service life of the equipment.

[0046] like Figure 3 As shown, the electronic control component 3 is installed inside the pump body 1 to detect operating data and wirelessly transmit data and control commands. The electronic control component 3 includes a speed sensor 301, a pressure sensor 302, a wireless transmission antenna 303, and a frequency converter 304. The speed sensor 301 is a photoelectric speed sensor, model DH5640. The pressure sensor 302 is a diffused silicon / ceramic piezoresistive sensor, located at the outlet 2013. The speed sensor 301 is located inside the pump body 1 corresponding to the output shaft 1024. The frequency converter 304 is located on one side of the drive mechanism 101. The signal input terminal of the wireless transmission antenna 303 is connected to the signal output terminals of the speed sensor 301 and the pressure sensor 302, respectively. The signal output terminal of the wireless transmission antenna 303 is connected to the signal input terminal of the frequency converter 304. The wireless transmission antenna 303 is mounted on the pump body 1. The electronic control component 3 enables the fire pump to monitor its operating status in real time and transmit data wirelessly, facilitating remote monitoring and adjustment.

[0047] like Figures 1-3 As shown, the air filtration mechanism 4 includes a negative pressure suction box 401, an air inlet pipe 402, and an air filter 403. The negative pressure suction box 401 is located on the pump body 1 at a position corresponding to the transmission mechanism 102 and is connected to the pump body 1 at the corresponding position. The negative pressure suction box 401 is equipped with an air inlet pipe 402 and an exhaust pipe 404, and the exhaust pipe 404 is connected to the air filter 403. The air filtration mechanism 4 ensures that the transmission mechanism 102 operates in a clean environment, reduces damage to transmission components from dust and other impurities, and extends the service life of the equipment.

[0048] The working principle of the four-stage high-pressure relay fire pump is as follows: Upon starting the drive mechanism 101, the drive mechanism 101 drives the first transmission turntable 1021 to rotate via the output shaft 1024. The first transmission turntable 1021 drives the second transmission turntable 1022 to rotate via the connecting shaft 1023. The second transmission turntable 1022 drives the drive shaft 2022 to rotate. The drive shaft 2022 drives the pump shaft 203 to rotate via the connecting seat 2021. The pump shaft 203 drives the four impellers 204 to rotate synchronously. When the impellers 204 rotate, the pump blades 2045 on the impellers 204 generate centrifugal force, causing water to enter the pump chamber 2011 from the inlet 2012. After being pressurized by the four-stage impellers 204, the water is ejected at high pressure from the outlet 2013. During this process, the electronic control component 3 monitors the pump's operating status in real time through the speed sensor 301 and the pressure sensor 302, and transmits the data through the wireless transmission antenna 303. At the same time, it receives control commands and adjusts the speed of the drive mechanism 101 through the frequency converter 304 to adapt to different working requirements.

[0049] The structural design of the four-stage high-pressure relay fire pump gives it the following advantages:

[0050] 1. The four-stage impeller 204 design allows the water flow to undergo multiple stages of pressurization, generating higher outlet water pressure to meet the fire protection requirements of high-rise buildings;

[0051] 2. The weight-reducing through hole 2032 on the pump shaft 203 reduces the weight of the pump shaft 203, lowers the moment of inertia, and improves the start-up speed and operating efficiency;

[0052] 3. The sealing ring 205 ensures the pump's sealing performance and prevents water leakage;

[0053] 4. The installation of electrical control component 3 enables real-time monitoring and remote control, improving the intelligence level of the equipment;

[0054] 5. The air filtration mechanism 4 ensures that the transmission mechanism 102 operates in a clean environment, extending the service life of the equipment.

[0055] Example 2

[0056] Based on Embodiment 1, the four-stage high-pressure relay fire pump in this embodiment has five impellers 204 mounted on the pump shaft 203, adding one stage of impellers 204, so that the water flow undergoes five stages of pressurization, further increasing the outlet water pressure. The structure of the five impellers 204 is the same as that of the impellers 204 in Embodiment 1, all including a circular mounting plate 2041. A central seat 2042 is formed in the middle of the mounting plate 2041. A connecting hole 2043 is opened in the middle of one surface of the central seat 2042. The connecting hole 2043 cooperates with the pump shaft 203. Several arc-shaped baffles 2044 are arranged circumferentially around the center of the mounting plate 2041 on the other surface of the mounting plate 2041. The arc-shaped baffles 2044 have the same center. A water passage is left between adjacent arc-shaped baffles 2044. Pump blades 2045 are arranged on the outside of the arc-shaped baffles 2044, and the pump blades 2045 are arranged in a circular array around the center of the mounting plate 2041.

[0057] Example 3

[0058] Based on Embodiment 1, in this embodiment, the weight-reducing through-hole 2032 opened along the axis of the pump shaft 203 of the four-stage high-pressure relay fire pump is a spiral through-hole. The spiral through-hole extends along the axial direction of the pump shaft 203, forming a spiral cavity. This spiral weight-reducing through-hole 2032 can not only reduce the weight of the pump shaft 203, but also enhance the structural strength of the pump shaft 203, improve its torsional resistance, and make the pump shaft 203 more stable when rotating at high speed.

[0059] Example 4

[0060] Based on Embodiment 1, the electrical control component 3 of the four-stage high-pressure relay fire pump in this embodiment also includes a temperature sensor. The temperature sensor is installed inside the pump body 1 at a position corresponding to the drive mechanism 101, and is used to monitor the operating temperature of the drive mechanism 101. The signal output terminal of the temperature sensor is also connected to the signal input terminal of the wireless transmission antenna 303 to realize real-time monitoring and transmission of temperature data. When the temperature of the drive mechanism 101 is too high, the system can automatically adjust its operating status or issue an alarm to prevent the equipment from overheating and being damaged.

[0061] Example 5

[0062] Based on Embodiment 1, the air filter 403 in the air filtration mechanism 4 of the four-stage high-pressure relay fire pump in this embodiment adopts a multi-layer filtration structure, including a pre-filter layer, a medium-efficiency filter layer, and a high-efficiency filter layer. The pre-filter layer is used to filter larger dust particles, the medium-efficiency filter layer is used to filter medium-sized particles, and the high-efficiency filter layer is used to filter fine particles and bacteria. The multi-layer filtration structure can more effectively purify the air and protect the transmission mechanism 102 from contamination.

[0063] Example 6

[0064] Based on Embodiment 1, the pump blades 2045 on the impeller 204 of the four-stage high-pressure relay fire pump in this embodiment adopt a backward-curved design, with the outer edge of the pump blades 2045 curving in the opposite direction to the rotation direction of the impeller 204. This backward-curved pump blade design can reduce water flow turbulence, improve pump efficiency, and reduce noise and vibration.

[0065] Example 7

[0066] Based on Embodiment 1, the pump head casing 201 of the four-stage high-pressure relay fire pump in this embodiment is made of corrosion-resistant alloy material, which can resist the erosion of various corrosive media and is suitable for fire fighting tasks in different environments. At the same time, the inner wall of the pump head casing 201 is smoothed to reduce water flow resistance and improve pump efficiency.

[0067] Example 8

[0068] Based on Embodiment 1, the drive mechanism 101 of the four-stage high-pressure relay fire pump in this embodiment is a variable frequency motor, which can adjust the speed according to actual needs to adapt to different working conditions. The variable frequency motor works in conjunction with the variable frequency regulator 304, and automatically adjusts the motor speed through the control commands received by the electrical control component 3 to achieve intelligent control.

[0069] It should be noted that Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4, Embodiment 5, Embodiment 6, Embodiment 7, and Embodiment 8 are all types of four-stage high-pressure relay fire pumps.

[0070] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A four-stage high-pressure relay fire pump, characterized in that, include: The pump body has a drive mechanism and a transmission mechanism inside, and the output end of the drive mechanism is connected to the transmission mechanism. A pump head includes a pump head housing. A drive connection mechanism is provided at one end of the pump head housing. A water pumping chamber is formed inside the pump head housing, and a pump shaft is rotatably mounted within the water pumping chamber. The drive connection mechanism is coaxially connected to the pump shaft. An inlet is provided at the end of the pump head housing away from the drive connection mechanism, and an outlet is provided on the side wall of the pump head housing near the drive connection mechanism. Both the inlet and outlet communicate with the water pumping chamber. At least four impellers are mounted on the pump shaft. Each impeller includes a circular mounting plate. A central seat is formed in the center of the mounting plate. A connecting hole is provided in the center of one surface of the central seat, and the connecting hole mates with the pump shaft. Several arc-shaped baffles are arranged circumferentially around the center of the mounting plate on the other surface of the mounting plate. The arc-shaped baffles have the same center, and a water passage is provided between adjacent arc-shaped baffles. Pump blades are arranged on the outer side of the arc-shaped baffles in a circular array around the center of the mounting plate. The drive connection mechanism is connected to the output end of a transmission mechanism. An electronic control component is installed inside the pump body to detect working data and wirelessly transmit data and control commands.

2. The four-stage high-pressure relay fire pump according to claim 1, characterized in that, The drive connection mechanism includes a connecting seat, a drive shaft, and a rotating bearing. The rotating bearing is disposed inside the pump head housing. The connecting seat has a convex cross-section and a connecting through hole in the middle. The end of the drive shaft is fixedly sleeved in the connecting through hole. The outside of the connecting seat is connected to the inner ring of the rotating bearing. The end of the pump shaft is sleeved in the connecting through hole. A flange is formed on the pump shaft, and the flange is connected to the inner ring of the rotating bearing.

3. The four-stage high-pressure relay fire pump according to claim 1, characterized in that, A sealing ring is provided inside the pump head housing near the rotating bearing, and the inner side of the sealing ring is connected to the pump shaft.

4. The four-stage high-pressure relay fire pump according to claim 1, characterized in that, The pump shaft has a weight-reducing through hole along its axis.

5. The four-stage high-pressure relay fire pump according to claim 2, characterized in that, The transmission mechanism includes a first transmission turntable and a second transmission turntable, and a connecting shaft is connected between the first transmission turntable and the second transmission turntable. The connecting shaft does not coincide with the axis of the first transmission turntable and the axis of the second transmission turntable. The drive mechanism is connected to an output shaft. The first transmission turntable is coaxially connected to the output shaft, and the second transmission turntable is coaxially connected to the drive shaft. An air filter mechanism is provided on the pump body at a position corresponding to the transmission mechanism, and the air filter mechanism is connected to the pump body at the corresponding position.

6. The four-stage high-pressure relay fire pump according to claim 5, characterized in that, The electronic control assembly includes a speed sensor, a pressure sensor, a wireless transmission antenna, and a frequency converter. The pressure sensor is located at the outlet, the speed sensor is located in the pump body at the position corresponding to the output shaft, the frequency converter is located on one side of the drive mechanism, the signal input terminal of the wireless transmission antenna is connected to the signal output terminals of the speed sensor and the pressure sensor respectively, the signal output terminal of the wireless transmission antenna is connected to the signal input terminal of the frequency converter, and the wireless transmission antenna is located on the pump body.

7. The four-stage high-pressure relay fire pump according to claim 5, characterized in that, The air filtration mechanism includes a negative pressure suction box, an air inlet pipe, and an air filter. The negative pressure suction box is located on the pump body at a position corresponding to the transmission mechanism and is connected to the pump body at the corresponding position. The negative pressure suction box is provided with an air inlet pipe and an air outlet pipe, and the air outlet pipe is connected to the air filter.

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