Pump head structure of four-stage high-pressure relay fire pump
By employing four impellers and a drive connection mechanism in the pump head structure of the four-stage high-pressure relay fire pump, the problem of insufficient pressure in existing high-pressure relay pumps has been solved, achieving a greater water pressure output.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN KAIWEI FIRE EQUIP CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-04-21
AI Technical Summary
Existing high-pressure relay pumps have low pressure due to limitations in the centrifugal pump head and engine structure, which cannot meet actual needs.
The design proposes a pump head structure for a four-stage high-pressure relay fire pump. Four impellers are mounted on the pump shaft. The rotation of the impellers generates turbulence and a narrow water passage to achieve four-stage pressurization. The drive connection mechanism and sealing rings ensure rotational stability and sealing performance.
It achieves greater water pressure output, meets actual usage requirements, and improves the pump's pressurization capacity.
Smart Images
Figure CN224149798U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fire pump technology, specifically relating to the pump head structure of a four-stage high-pressure relay fire pump. Background Technology
[0002] The existing high-pressure relay pump mainly consists of an aircraft engine, a centrifugal pump head, an electrical control system, a manual start device, a pressure gauge, and a speed display.
[0003] Working principle: The engine is started manually or by the electronic control system, which then drives the centrifugal pump head to pressurize and deliver water to the designated location. Simultaneously, the pressure gauge displays the corresponding pressure, and the tachometer displays the corresponding speed. Disadvantages: 1. Due to limitations in the centrifugal pump head and engine structure, existing high-pressure relay pumps result in relatively low pressure during operation, which cannot adequately meet the requirements. Utility Model Content
[0004] The purpose of this invention is to provide a pump head structure for a four-stage high-pressure relay fire pump to solve the aforementioned problems in the prior art.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A pump head structure for a four-stage high-pressure relay fire pump includes a pump head housing, a drive connection mechanism at one end of the pump head housing, a pump water chamber formed inside the pump head housing, a pump shaft rotatably mounted inside the pump water chamber, the drive connection mechanism being coaxially connected to the pump shaft, an inlet at the end of the pump head housing away from the drive connection mechanism, and an outlet on the side wall of the pump head housing near the drive connection mechanism, both the inlet and the outlet communicating with the pump water chamber.
[0007] At least four impellers are fitted onto the pump shaft. Each 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. 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 left 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.
[0008] The working process and principle of the above structure are as follows:
[0009] When the pump head is working, the drive connection mechanism transmits the power of the motor to the pump shaft. The pump shaft drives the four impellers to rotate and generate negative pressure. The water flows into the pump chamber from the inlet and first contacts the surface of the mounting plate. The pump blades generate turbulence and suction during rotation. The water inside the arc-shaped baffle is discharged to the outside from the water passage. Due to the narrow water passage, a greater water pressure can be generated. After being pumped by the four-stage impeller, the pressurized water flows out 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.
[0010] Preferably, both the inlet and outlet are provided with external threads.
[0011] The external thread design facilitates the connection of the inlet to the water tank, and the outlet can be easily connected to other pressure nozzles via the external thread.
[0012] Preferably, 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.
[0013] 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.
[0014] Preferably, 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.
[0015] The sealing ring ensures the airtightness of the pump chamber and prevents water from entering the connection structure.
[0016] Preferably, the pump shaft has a weight-reducing through hole along its axis.
[0017] 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.
[0018] Beneficial effects: When the pump head is working, the drive connection mechanism transmits the power of the electric motor to the pump shaft. The pump shaft drives four impellers to rotate and generate 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, forming suction. The water flow inside the arc-shaped baffle is discharged to the outside from the water passage. Due to the narrow water passage, a greater water pressure can be generated. After being pumped by four impellers, the pressurized water flow 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. Attached Figure Description
[0019] Figure 1 This is a front view of the pump head housing structure in this utility model;
[0020] Figure 2 This is a top view of the pump head housing in this utility model;
[0021] Figure 3 This is a front sectional view of the pump head housing in this utility model;
[0022] Figure 4 This is a schematic diagram of the impeller structure in this utility model.
[0023] Reference numerals: 1. Pump head housing; 101. Inlet; 102. Outlet; 103. Pump water chamber; 2. Pump shaft; 201. Flange; 202. Weight reduction through hole; 3. Drive connection mechanism; 301. Connecting seat; 302. Drive shaft; 303. Rotary bearing; 304. Connecting through hole; 4. Impeller; 401. Mounting plate; 402. Center seat; 403. Connecting hole; 404. Arc-shaped baffle; 405. Pump blade; 5. Sealing ring. Detailed Implementation
[0024] 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.
[0025] Example:
[0026] like Figures 1-4As shown, this embodiment provides a pump head structure for a four-stage high-pressure relay fire pump, including a pump head shell 1, a drive connection mechanism 3 at one end of the pump head shell 1, a pump water chamber 103 formed inside the pump head shell 1, a pump shaft 2 rotatably arranged inside the pump water chamber 103, the drive connection mechanism 3 being coaxially connected to the pump shaft 2, an inlet 101 at the end of the pump head shell 1 away from the drive connection mechanism 3, and an outlet 102 on the side wall of the end of the pump head shell 1 near the drive connection mechanism 3, the outlet 102 having a funnel-shaped structure, and both the inlet 101 and the outlet 102 communicating with the pump water chamber 103;
[0027] At least four impellers 4 are fitted on the pump shaft 2. Each impeller 4 includes a circular mounting plate 401. A center seat 402 is formed in the middle of the mounting plate 401. A connecting hole 403 is opened in the middle of one surface of the center seat 402. The connecting hole 403 cooperates with the pump shaft 2. Eight arc-shaped baffles 404 are arranged circumferentially around the center of the mounting plate 401 on the other surface of the mounting plate 401. The arc-shaped baffles 404 have the same center. A water passage is left between adjacent arc-shaped baffles 404. Pump blades 405 are arranged on the outside of the arc-shaped baffles 404. The pump blades 405 are also arc-shaped and are arranged in a circular array around the center of the mounting plate 401.
[0028] The working process and principle of the above structure are as follows:
[0029] When the pump head is working, the drive connection mechanism 3 transmits the power of the motor to the pump shaft 2. The pump shaft 2 drives the four impellers 4 to rotate and generate negative pressure. The water flows into the pump water chamber 103 from the inlet 101 and first contacts the surface of the mounting plate 401. The pump blades 405 generate turbulence and suction during rotation. The water flow inside the arc-shaped baffle 404 is discharged to the outside from the water passage. Due to the narrow water passage, a greater water pressure can be generated. After being pumped by the four-stage impellers 4, the pressurized water flows out from the outlet 102. By improving the structure of the pump head and impellers 4, four-stage pressurization is achieved, which can generate greater water pressure and better meet the actual use requirements.
[0030] In another embodiment of this utility model, such as Figures 1-4 As shown, both the inlet 101 and the outlet 102 are provided with external threads.
[0031] The external thread facilitates the connection of the inlet 101 to the water tank, and the outlet 102 is convenient for connecting other pressure nozzles via the external thread.
[0032] In another embodiment of this utility model, such as Figures 1-4As shown, the drive connection mechanism 3 includes a connecting seat 301, a drive shaft 302, and a rotating bearing 303. The rotating bearing 303 is disposed inside the pump head housing 1. The longitudinal section of the connecting seat 301 has a convex shape. A connecting through hole 304 is provided in the middle of the connecting seat 301. The end of the drive shaft 302 is fixedly sleeved in the connecting through hole 304. The outside of the connecting seat 301 is connected to the inner ring of the rotating bearing 303. The end of the pump shaft 2 is sleeved in the connecting through hole 304. A flange 201 is formed on the pump shaft 2. The flange 201 is connected to the inner ring of the rotating bearing 303.
[0033] The drive shaft 302 and the pump shaft 2 are coaxially connected by the connecting seat 301, and the connecting seat 301 is connected to the rotating bearing 303 to ensure smooth rotation. The flange 201 on the pump shaft 2 facilitates direct connection between the pump shaft 2 and the rotating bearing 303, which can provide support and ensure the connection between the pump shaft 2 and the connecting seat 301. The rotating bearing 303 further limits the connection.
[0034] In another embodiment of this utility model, such as Figure 3 As shown, a sealing ring 5 is provided inside the pump head housing 1 near the rotating bearing 303, and the inner side of the sealing ring 5 is connected to the pump shaft 2. The sealing ring 5 has a conical disc structure.
[0035] The sealing ring 5 is designed to ensure the sealing of the pump water chamber 103 and prevent water from entering the connection structure.
[0036] In another embodiment of this utility model, such as Figure 3 As shown, the pump shaft 2 has a weight-reducing through hole 202 along its axis.
[0037] The weight-reducing through-hole 202 reduces the weight of the pump shaft 2. At the same time, when water flows in, it can also increase its rotational inertia, making the pump shaft 2 rotate more efficiently.
[0038] 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 pump head structure of a four-stage high-pressure relay fire pump, characterized by, The pump head housing includes a pump head housing, one end of which is provided with a drive connection mechanism. A pump water chamber is formed inside the pump head housing, and a pump shaft is rotatably arranged inside the pump water chamber. The drive connection mechanism is coaxially connected to the pump shaft. A water inlet is provided at the end of the pump head housing away from the drive connection mechanism, and a water outlet is provided on the side wall of the pump head housing near the drive connection mechanism. Both the water inlet and the water outlet are connected to the pump water chamber. At least four impellers are fitted onto the pump shaft. Each 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. 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 left 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.
2. The pump head structure of a four-stage high-pressure relay fire pump according to claim 1, characterized in that, Both the inlet and outlet are provided with external threads.
3. The pump head structure of a 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.
4. The pump head structure of a four-stage high-pressure relay fire pump according to claim 3, 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.
5. The pump head structure of a 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.