Anti-seismic diesel engine fire pump set

Abstract

The invention provides an anti-seismic diesel engine fire pump set, which relates to the technical field of fire fighting equipment and comprises an anti-seismic diesel engine fire pump set base, a diesel engine and a fire pump, the anti-seismic diesel engine fire pump set base comprises a base frame and at least one reinforcing steel channel main beam arranged on the base frame. The diesel engine main engine is fixedly mounted on the anti-seismic diesel engine fire pump set base through the integrated base; the fire pump is fixedly installed on the anti-seismic diesel engine fire pump set base through pump feet and comprises a double-volute pump body fixedly installed on the pump feet, a pump cover connected with the double-volute pump body and located above the double-volute pump body, a pump shaft penetrating through the double-volute pump body and the pump cover and a double-suction impeller installed on the pump shaft. The anti-seismic performance of the diesel engine fire pump set is improved, and normal operation of the whole pump set under the earthquake working condition is guaranteed. According to the double-volute pump body and the double-suction impeller, the axial force generated when the impeller operates can be self-balanced, meanwhile, the radial force of the impeller is reduced, and the pump shaft operates more stably.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment technology, and in particular to a shock-resistant diesel engine fire pump set. Background Technology

[0002] Currently, diesel engine fire pump sets are widely used as backup power in industries such as petrochemicals and thermal power generation. However, the equipment used in these industries is not earthquake-resistant, and its design standards, technical solutions, and testing requirements are based on conventional industrial environments, which have inherent defects and cannot meet extremely stringent earthquake resistance requirements.

[0003] The main drawback of existing non-seismic-resistant diesel engine fire pump sets is their insufficient seismic resistance. Specifically: Insufficient design load: Non-seismic pump sets are designed only for internal loads and external pipe loads under normal operating conditions, without taking seismic loads, especially the operational safety seismic vibration (SL-1) and ultimate safety seismic vibration (SL-2) into account. Seismic-resistant equipment must withstand the most stringent load combinations, including internal loads, pipe loads, and SL-2 seismic loads, which far exceeds the design basis of non-seismic pump sets.

[0004] Low structural reliability: After an SL-1 level earthquake, the supporting structure of the non-seismic pump unit may have residual deformation, affecting the long-term normal operation of the equipment; under the extreme earthquake of SL-2 level, its structure is very easy to be damaged, resulting in the complete loss of equipment function.

[0005] The system lacks overall seismic resistance: the design of the non-seismic pump set lacks systematic seismic considerations, and the connection and fixing methods between its base, diesel engine, fire pump, and other components have not been optimized in a coordinated manner. Under the strong vibration and impact caused by an earthquake, key components may loosen or fail, causing the entire pump set to fail to start and operate reliably at critical moments, posing a serious safety hazard.

[0006] Therefore, how to improve the seismic resistance of diesel engine fire pump sets has become a key technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0007] To address the issue of how to improve the seismic resistance of diesel engine fire pump sets in the existing technology, the purpose of this invention is to provide a seismic-resistant diesel engine fire pump set.

[0008] A seismic-resistant diesel engine fire pump set, comprising: An earthquake-resistant diesel engine fire pump set base includes a base frame and at least one reinforcing channel steel main beam disposed along the length of the base frame; The diesel engine, the main diesel engine, is fixedly mounted on the base of the anti-vibration diesel engine fire pump set via an integrated base; A fire pump is fixedly mounted on the base of the anti-vibration diesel engine fire pump set via pump feet. The fire pump and the diesel engine are driven and connected via a coupling. The fire pump includes a double volute pump body fixedly mounted on the pump feet, a pump cover connected to the double volute pump body and located above the double volute pump body, a pump shaft passing through the double volute pump body and the pump cover, and a double suction impeller mounted on the pump shaft.

[0009] Furthermore, the base frame includes two parallel and spaced vertical channel steel main beams and two parallel and spaced horizontal channel steel main beams, with the two horizontal channel steel main beams vertically connected between the two vertical channel steel main beams respectively. The reinforced channel steel main beam is arranged parallel between the two transverse channel steel main beams and is vertically connected between the two vertical channel steel main beams.

[0010] Furthermore, a diesel engine mounting plate and a fire pump mounting plate are provided on the base frame; The diesel engine mounting plate includes a first diesel engine mounting plate and a second diesel engine mounting plate, which are symmetrically arranged on opposite sides of the reinforcing channel steel main beam. And / or, the fire pump mounting plate includes a first fire pump mounting plate and a second fire pump mounting plate, the first fire pump mounting plate and the second fire pump mounting plate being symmetrically arranged on opposite sides of the reinforcing channel steel main beam.

[0011] Furthermore, a first channel steel support is provided below the diesel engine mounting plate, and the first channel steel support is welded to the base frame; And / or, a second channel steel support is provided below the fire pump mounting plate, and the second channel steel support is welded to the base frame.

[0012] Furthermore, the base of the earthquake-resistant diesel engine fire pump set also includes a lifting device, which includes a lifting welded reinforcing plate, a lifting force-bearing pipe, and a lifting baffle. The lifting welded reinforcing plate is welded to the transverse channel steel main beam, the lifting force-bearing pipe is welded through the lifting welded reinforcing plate and the transverse channel steel main beam, and the lifting baffle is welded to the end of the lifting force-bearing pipe away from the lifting welded reinforcing plate. And / or, the base of the earthquake-resistant diesel engine fire pump set further includes an anchor bolt mounting structure welded to the transverse channel steel main beam. The anchor bolt mounting structure includes an anchor bolt mounting plate and an anchor bolt mounting plate reinforcing rib. The anchor bolt mounting plate is provided with anchor bolt mounting holes and leveling holes. The anchor bolt mounting plate reinforcing rib is welded to the anchor bolt mounting plate. And / or, the base of the earthquake-resistant diesel engine fire pump set further includes an angle steel fixing bracket, a channel steel fixing surface and a channel steel fixing beam. The angle steel fixing bracket is welded to the reinforcing channel steel main beam, the channel steel fixing surface is welded to the top surface of the transverse channel steel main beam, and the channel steel fixing beam is welded to the side of the transverse channel steel main beam.

[0013] Furthermore, the integrated base is welded from high-strength steel plates and includes a front support plate, a rear support plate, a left support plate, a right support plate, a top connecting plate, and a bottom connecting plate. Both the left and right support plates are equipped with reinforcing ribs.

[0014] Furthermore, the fire pump also includes a cartridge mechanical seal assembly, which is sleeved on the pump shaft and used to seal the gap between the pump shaft and the double volute pump body and the pump cover; And / or, the fire pump further includes a first flange and a second flange, the first flange being disposed at the inlet of the double volute pump body, and the second flange being disposed at the outlet of the double volute pump body.

[0015] Furthermore, the pump shaft is a stepped shaft, and the pump shaft includes: The floating end is axially floatingly disposed at one end of the double volute pump body via a first support component; The positioning end is axially positioned at the other end of the double volute pump body via the second support component.

[0016] Furthermore, the outer periphery of the coupling is provided with a coupling guard, the coupling guard comprising: The protective cover body has a hollow structure. One end of the protective cover body is connected to the diesel engine flywheel of the diesel engine, and the other end is connected to the bearing seat of the fire pump. The mounting bracket has its bottom fixedly connected to the base of the anti-vibration diesel engine fire pump set, and its top is provided with a mounting part for supporting and fixing the protective cover body.

[0017] Furthermore, the earthquake-resistant diesel engine fire pump set also includes a battery box, which comprises: The box body has at least one partition plate inside to divide the inner cavity of the box body into multiple placement cavities for accommodating batteries; A clamping element, detachably disposed within the placement cavity, is used to clamp the battery housed within the placement cavity from above.

[0018] Compared with the prior art, the earthquake-resistant diesel engine fire pump set provided in this embodiment of the invention has at least the following technical effects: The earthquake-resistant diesel engine fire pump set includes an earthquake-resistant diesel engine fire pump set base, a diesel engine, and a fire pump. The earthquake-resistant diesel engine fire pump set base includes a base frame and at least one reinforcing channel steel main beam arranged along the length of the base frame. The diesel engine is fixedly mounted on the earthquake-resistant diesel engine fire pump set base via an integrated base. The fire pump is fixedly mounted on the earthquake-resistant diesel engine fire pump set base via pump feet. The fire pump and the diesel engine are driven together via a coupling. The fire pump includes a double volute pump body fixedly mounted on the pump feet, a pump cover connected to and located above the double volute pump body, a pump shaft passing through the double volute pump body and the pump cover, and a double suction impeller mounted on the pump shaft. The earthquake-resistant diesel engine fire pump set base, including a base frame and at least one reinforcing channel steel main beam arranged along the length of the base frame, enhances the overall rigidity and strength of the base, improving its earthquake resistance. The integrated base and pump feet securely mount the diesel engine and fire pump to the earthquake-resistant diesel engine fire pump set base, effectively avoiding the frequency range of the seismic response spectrum. This keeps the dynamic response under seismic loads within a safe range, ensuring the normal operation of the entire pump set under seismic conditions. Furthermore, the double-volute pump body and double-suction impeller design allow the axial force generated by the impeller during operation to self-balance, while reducing the radial force on the impeller. This reduces the stress on the pump shaft during operation, thereby lowering the vibration level and making the pump shaft run more smoothly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an anti-vibration diesel engine fire pump set according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the anti-vibration diesel engine fire pump set base in one embodiment of the present invention; Figure 3 This is a schematic diagram of the integrated diesel engine base in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a fire pump in one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the coupling cover in one embodiment of the present invention; Figure 6 This is a schematic diagram of the battery box structure in one embodiment of the present invention.

[0021] Figure label: 10. Earthquake-resistant diesel engine fire pump set base; 11. Base frame; 111. Vertical channel steel main beam; 112. Horizontal channel steel main beam; 113. Diesel engine mounting plate; 114. Fire pump mounting plate; 115. First channel steel support; 116. Second channel steel support; 12. Reinforced channel steel main beam; 13. Lifting device; 131. Lifting welded reinforcing plate; 132. Lifting force-bearing pipe; 133. Lifting baffle; 141. Anchor bolt mounting plate; 1411. Anchor bolt mounting hole; 1412. Leveling hole; 142. Anchor bolt mounting plate reinforcing rib; 151. Angle steel fixing bracket; 152. Channel steel fixing surface; 153. Channel steel fixing beam; 16. Grounding threaded hole; 17. Protective cover bracket mounting hole; 18. Liquid collection tray; 181. Grouting hole; 182. Vent hole; 183. Supporting angle steel; 19. Sewage outlet; 20. Diesel engine; 21. Integrated base; 211. Front support plate; 212. Rear support plate; 213. Left support plate; 214. Right support plate; 215. Top connecting plate; 216. Reinforcing rib plate; 30. Fire pump; 31. Pump foot; 32. Double volute pump body; 33. Pump cover; 331. Reinforcing rib; 34. Pump shaft; 341. Floating end; 342. Positioning end; 35. Double suction impeller; 36. Cartridge-type mechanical seal assembly; 361. Shaft sleeve; 362. Mechanical seal gland; 363. Water baffle ring; 371. First bearing housing; 372. Axial floating bearing; 381. Second bearing housing; 382. Bearing; 383. End face locking component; 39. Sensor interface; 40. Couplings; 50. Coupling cover; 51. Cover body; 511. First half of the cover; 512. Second half of the cover; 513. Telescopic section; 514. Flywheel connection; 515. Bearing seat connection; 52. Mounting bracket; 521. Mounting part; 53. Buffer and shock absorption pad; 54. Ventilation and heat dissipation holes; 60. Battery box; 61. Box body; 611. Base plate; 6121. Front side panel; 6122. Left side panel; 6123. Rear side panel; 6124. Right side panel; 613. Corner panel; 62. Clamping component; 63. Divider plate; 64. Placement cavity; 65. Vertical reinforcing rib; 66. Horizontal reinforcing rib; 67. Supporting part; 68. Handle. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0024] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0025] Please refer to the attached document. Figures 1 to 4 As shown, an embodiment of the present invention provides an anti-vibration diesel engine fire pump set, including an anti-vibration diesel engine fire pump set base 10, a diesel engine 20, and a fire pump 30; the anti-vibration diesel engine fire pump set base 10 includes a base frame 11 and at least one reinforcing channel steel main beam 12 arranged in the length direction of the base frame 11; the diesel engine is fixedly installed on the anti-vibration diesel engine fire pump set base 10 through an integrated base 21; the fire pump 30 is fixedly installed on the anti-vibration diesel engine fire pump set base 10 through pump feet 31, and the fire pump 30 and the diesel engine 20 are drivenly connected through a coupling 40. The fire pump 30 includes a double volute pump body 32 fixedly installed on the pump feet 31, a pump cover 33 connected to and located above the double volute pump body 32, a pump shaft 34 passing through the double volute pump body 32 and the pump cover 33, and a double suction impeller 35 installed on the pump shaft 34.

[0026] The anti-seismic diesel engine fire pump set base 10, comprising a base frame 11 and at least one reinforcing channel steel main beam 12 along the length of the base frame 11, enhances the overall rigidity and strength of the base, thereby improving its seismic performance. The integrated base 21 and pump feet 31, which securely mount the diesel engine and fire pump 30 to the anti-seismic diesel engine fire pump set base 10, effectively avoid the frequency range of the seismic response spectrum, thus controlling the dynamic response under seismic action within a safe range and ensuring the normal operation of the entire pump set under seismic conditions. Furthermore, the double volute pump body 32 and double suction impeller 35 allow the axial force generated during impeller operation to self-balance, while reducing the radial force on the impeller. This reduces the stress on the pump shaft 34 during operation, thereby lowering the vibration level and making the pump shaft 34 operate more smoothly.

[0027] Please refer to the appendix again. Figure 2As shown, the base frame 11 includes two parallel and spaced-apart vertical channel steel main beams 111 and two parallel and spaced-apart transverse channel steel main beams 112. The two transverse channel steel main beams 112 are vertically connected between the two vertical channel steel main beams 111. Specifically, the base frame 11 is welded together from the two parallel and spaced-apart vertical channel steel main beams 111 and the two parallel and spaced-apart transverse channel steel main beams 112 to form a rectangular frame. Reinforcing channel steel main beams 12 are arranged parallel to the two transverse channel steel main beams 112 and vertically connected between the two vertical channel steel main beams 111. Specifically, the two ends of the reinforcing channel steel main beams 12 are vertically welded between the two vertical channel steel main beams 111, enhancing the bending stiffness and overall stability of the seismic-resistant diesel engine fire pump set base 10 in the length direction. It should be further noted that, based on the width and mechanical analysis of the seismic-resistant diesel engine fire pump set base 10, multiple reinforcing channel steel main beams 12 can be added to specifically strengthen weak points. Among them, the vertical channel steel main beam 111, the horizontal channel steel main beam 112 and the reinforced channel steel main beam 12 can all adopt a widened and thickened design.

[0028] In some optional embodiments, there are two reinforcing channel steel main beams 12, which are arranged parallel to each other and spaced apart between the two transverse channel steel main beams 112.

[0029] In some optional embodiments, a diesel engine mounting plate 113 and a fire pump mounting plate 114 are provided on the base frame 11. The diesel engine mounting plate 113 includes a first diesel engine mounting plate and a second diesel engine mounting plate, which are symmetrically arranged on opposite sides of two reinforcing channel steel main beams 12. Specifically, there are two first diesel engine mounting plates, which are spaced apart along the length of one of the reinforcing channel steel main beams 12. Similarly, there are two second diesel engine mounting plates, which are correspondingly arranged along the length of the other reinforcing channel steel main beam 12, also spaced apart, and corresponding one-to-one with the two first diesel engine mounting plates.

[0030] In some optional embodiments, the fire pump mounting plate 114 includes a first fire pump mounting plate and a second fire pump mounting plate, which are symmetrically arranged on opposite sides of the two reinforcing channel steel main beams 12.

[0031] In some alternative embodiments, the diesel engine 20 is fixed to the diesel engine mounting plate 113 by eight high-strength bolts, and the fire pump 30 is fixed to the fire pump mounting plate 114 by four high-strength bolts.

[0032] In some optional embodiments, a first channel steel support 115 is provided below the diesel engine mounting plate 113. The first channel steel support 115 is welded to the base frame 11, thereby ensuring that the diesel engine mounting plate 113 is firmly installed on the base frame 11. It should be noted that there are two first channel steel supports 115, which are symmetrically distributed on opposite sides of the diesel engine mounting plate 113. This effectively ensures that the base is subjected to uniform force during operation, thereby improving the stability and reliability of the equipment in seismic events.

[0033] In some optional embodiments, a second channel steel support 116 is provided below the fire pump mounting plate 114. The second channel steel support 116 is welded to the base frame 11, thereby ensuring that the fire pump mounting plate 114 is firmly installed on the base frame 11. It should be noted that there are two second channel steel supports 116, which are symmetrically distributed on opposite sides of the fire pump mounting plate 114, effectively ensuring that the base is subjected to uniform stress during operation, thereby improving the stability and reliability of the equipment in seismic events.

[0034] In some optional embodiments, the earthquake-resistant diesel engine fire pump set base 10 further includes a lifting device 13, which includes a lifting welded reinforcing plate 131, a lifting force-bearing pipe 132, and a lifting baffle 133. The lifting welded reinforcing plate 131 is welded to the transverse channel steel main beam 112, the lifting force-bearing pipe 132 is welded through and onto both the lifting welded reinforcing plate 131 and the transverse channel steel main beam 112, and the lifting baffle 133 is welded to the end of the lifting force-bearing pipe 132 away from the lifting welded reinforcing plate 131. Preferably, the lifting force-bearing pipe 132 is a steel pipe, specifically a φ108mm steel pipe, and the lifting baffle 133 is a steel plate.

[0035] Compared with the rudimentary lifting devices in the prior art (which typically use cut circular holes as lifting holes, resulting in instances where the lifting ropes have been cut during actual operation, posing a safety hazard), this embodiment uses a secondary insertion welding design where the lifting force-bearing pipe 132 is welded through and welded to the lifting welding reinforcing plate 131 and the transverse channel steel main beam 112. This design improves the strength of the lifting force-bearing pipe 132 in bearing heavy objects. The outer lifting baffle 133 effectively prevents the lifting equipment from sliding outward. When in use, the lifting equipment is tied to the lifting force-bearing pipe 132, which not only ensures the strength of the lifting equipment but also prevents damage to the lifting equipment caused by the circular steel pipe, thus improving the safety and reliability of the lifting.

[0036] In some optional embodiments, the earthquake-resistant diesel engine fire pump set base 10 also includes an anchor bolt mounting structure welded to the transverse channel steel main beam 112. The anchor bolt mounting structure includes an anchor bolt mounting plate 141 and anchor bolt mounting plate reinforcing ribs 142, with the reinforcing ribs 142 welded to the anchor bolt mounting plate 141. Specifically, the anchor bolt mounting structure is formed as a whole by one anchor bolt mounting plate 141 and two anchor bolt mounting plate reinforcing ribs 142, and welded to the transverse channel steel main beam 112. By designing the anchor bolt mounting plate reinforcing ribs 142, it is ensured that the outer transverse channel steel main beam 112 will not deform under tightening force when the anchor bolts are tightened, resulting in a strong and reliable overall base. The anchor bolt mounting plate 141 is provided with anchor bolt mounting holes 1411 and leveling holes 1412. The leveling holes 1412 ensure that the base is leveled more conveniently and quickly during grouting.

[0037] In some optional embodiments, the earthquake-resistant diesel engine fire pump set base 10 also includes a control cabinet fixing structure, which includes an angle steel fixing bracket 151, a channel steel fixing surface 152, and a channel steel fixing beam 153. The angle steel fixing bracket 151 is welded to the reinforcing channel steel main beam 12, the channel steel fixing surface 152 is welded to the top surface of the transverse channel steel main beam 112, and the channel steel fixing beam 153 is welded to the side of the transverse channel steel main beam 112. The control cabinet is limited and fixed by the synergistic action of the angle steel bracket, the channel steel fixing surface 152, and the channel steel fixing beam 153, ensuring its structural reliability and preventing displacement or sliding. Furthermore, placing the control cabinet fixing structure on the base makes operation more convenient. Compared with the prior art method of centrally setting the control cabinet with the control cabinets of other equipment, placing the control cabinet fixing structure on the earthquake-resistant diesel engine fire pump set base 10 improves the response speed in emergency situations. In emergency situations, operators do not need to meticulously distinguish the equipment corresponding to the control cabinet, reducing operational errors that may result from panic and effectively avoiding delays in firefighting due to the need to distinguish control cabinets, thus preventing the loss of the best opportunity to fight the fire.

[0038] In some optional embodiments, the control cabinet door panel employs a conductive sealing ring to form a closed loop between the door panel and the cabinet body, thereby preventing the control cabinet from outputting high-amplitude interference signals to external facilities and resisting the entry of external interference signals. Based on seismic loads, a seismic analysis of the control cabinet is performed, increasing the thickness of the control cabinet shell from 1.5mm to 2mm to prevent deformation in the middle area of ​​the door panel, thus ensuring that electrical components in this area are not affected by excessive seismic amplitude and may malfunction. Simultaneously, the number of hinges on the control cabinet shell door panel is increased from two to three.

[0039] In some optional embodiments, the base frame 11 is provided with a grounding threaded hole 16 for connecting the neutral wire for grounding protection; the base frame 11 is provided with a protective cover bracket mounting hole 17 for fixing the protective cover bracket.

[0040] In some optional embodiments, the anti-vibration diesel engine fire pump set base 10 also includes a collection tray 18, which is installed at an angle of 3° to 5° on the base frame 11. The collection tray 18 is made of 5mm thick patterned anti-slip steel plate. A drain port 19 is provided at the lowest point of the collection tray 18, and the drain port 19 is connected to the outside via a flange. The collection tray 18 can effectively collect the dirt generated by the diesel engine 20 and fire pump 30 during operation and maintenance, ensuring the cleanliness and dryness of the work site.

[0041] In some optional embodiments, the collection tray 18 is provided with a grouting hole 181 and a vent hole 182. The grouting hole 181 is used to ensure the stability of equipment operation, while the vent hole 182 facilitates the discharge of gas from the base during the grouting process. The grouting hole 181 and the vent hole 182 are set in the middle position of the collection tray 18 by welding, and the height of these two holes is higher than the plane of the collection tray 18.

[0042] In some optional embodiments, a supporting angle steel 183 is provided at the bottom of the collection tray 18 for supporting and fixing the collection tray 18.

[0043] In some optional embodiments, all welds on the seismic-resistant diesel engine fire pump set base 10 are fully welded and subjected to flaw detection testing to ensure that the structure can fully meet the stability requirements under strong seismic conditions. After welding, the seismic-resistant diesel engine fire pump set base 10 undergoes stress relief treatment to ensure that the equipment will not become unstable due to stress deformation after subsequent installation. After overall stress relief treatment, the diesel engine mounting surface and the fire pump mounting surface of the seismic-resistant diesel engine fire pump set base 10 are machined to ensure that the positional tolerance is between 0.1 and 0.3 mm, controlling the flatness of the unit installation and improving the stability of the unit in seismic performance.

[0044] Please refer to the appendix again. Figure 3As shown, the integrated base 21 is welded from high-strength steel plates and includes a front support plate 211, a rear support plate 212, a left support plate 213, a right support plate 214, a top connecting plate 215, and a bottom connecting plate. Reinforcing ribs 216 are provided on both the left and right support plates 213 and 214. The top connecting plate 215 includes a front top connecting plate 215 and a rear top connecting plate 215, and the bottom connecting plate includes a front bottom connecting plate and a rear bottom connecting plate. All components of the integrated base 21 are fully welded together. The welds undergo liquid penetration testing to ensure weld quality. The integrated base 21 has good load-bearing capacity and impact resistance, effectively dispersing the vibration and load of the diesel engine 20 during operation and extending the overall service life of the pump set. This integrated base 21 can be designed according to the shape of the diesel engine 20 to optimize the center of gravity distribution, thereby reducing noise and resonance during operation and improving the smoothness of power output. The integrated base 21 has high structural strength, and its natural frequency is designed to effectively avoid the operating frequency of the diesel engine, thus meeting the requirements for seismic performance.

[0045] A key subsystem is fixed on the integrated base 21, which ensures the starting and operation of the diesel engine. This key subsystem includes an auxiliary starting system, a redundant starting system, and cooling water piping. The auxiliary starting system, including an oil pre-supply pump and a preheater, is designed to meet the requirements for rapid starting of the diesel engine. Because the diesel engine is an emergency device and is not normally started, prolonged standby time can cause oil to flow back into the oil pan. In the event of a fire, this can lead to prolonged starting time and difficulty in starting the engine. The oil pre-supply pump automatically operates periodically during standby, forcibly circulating oil to lubricate the internal parts of the diesel engine, ensuring rapid and reliable starting at all times. In low ambient temperatures (minimum 4°C), the temperature around the diesel engine cylinders is also low, which can cause prolonged starting time and difficulty in starting the engine. The preheater heats the coolant in the cylinder liners of the diesel engine, maintaining the temperature inside the combustion chamber above 49°C through heat conduction, ensuring rapid starting of the diesel engine. The redundant starting system is used to meet the high requirements of diesel engine starter for starting reliability. It includes two emergency starters in the control cabinet, which serve as backups for each other. In an emergency, the diesel engine starter can be started manually.

[0046] The cooling water pipeline is used to filter and reduce the pressure of the cooling water from the fire pump outlet before delivering it to the diesel engine main unit. The cooling water pipeline is equipped with components such as ball valves, filters, pressure reducing valves, solenoid valves, and pressure sensors, and is connected by flanges. Its main function is to filter and reduce the pressure of the cooling water from the fire pump outlet before delivering it to the diesel engine main unit. The cooling water pipeline is fixed by four pipe clamps, which are bolted to the cooling water pipeline support rod, which is fixed to the base side plate. The cooling water pipeline is designed with two channels: a normal passage and an emergency passage. In case of blockage or other abnormalities in the normal passage, the ball valve on the normal passage can be manually closed and the ball valve on the emergency passage can be manually opened without stopping the diesel engine 20, allowing cooling water to enter the diesel engine 20 through the emergency passage, ensuring normal cooling water supply and heat dissipation for the diesel engine 20. A temperature switch is installed on the cooling water pipeline; when the temperature reaches the set high temperature, a high-temperature alarm will be triggered. Meanwhile, pressure sensors are installed at both ends of the cooling water pipeline. The pressure difference between the two points can determine whether the cooling water inlet flow is sufficient and whether there are any abnormalities such as blockages. Combined with temperature and pressure sensors on the cooling water pipeline, it is possible to monitor high cooling water temperature and abnormal flow, thereby ensuring that a sufficient amount of cooling water at the appropriate temperature flows through the diesel engine 20, ensuring normal heat dissipation of the diesel engine 20. The flange connection is a rigid combination consisting of a flange, a shock-resistant flexible graphite metal spiral wound gasket, and shock-resistant high-strength bolts. It has strong structural stability, can withstand medium and high pressure and high temperature environments, has excellent sealing performance, and is reliable in long-term operation, meeting seismic requirements and ensuring normal cooling water supply under earthquake conditions, ensuring normal cooling of the diesel engine 20.

[0047] In some optional embodiments, the fire pump 30 also includes a cartridge mechanical seal assembly 36, which is fitted onto the pump shaft 34 to seal the gap between the pump shaft 34 and the double-volute pump body 32 and pump cover 33. The cartridge mechanical seal assembly 36 is a balanced multi-spring cartridge structure and has been designed with seismic resistance optimization to ensure sealing reliability under seismic conditions. During the production process, a PLAN11 self-flushing mechanical seal is used to ensure the reliability of the fire pump 30 during autonomous operation. Test results show that the mechanical seal can operate stably for a long time under near-zero flow conditions, and after earthquake testing simulated on a vibration table and multiple start-stop cycles, no destructive damage was observed.

[0048] In some optional embodiments, the pump cover 33 of the fire pump 30 is provided with reinforcing ribs 331, which enhances the rigidity and pressure-bearing capacity of the pump cover 33, thereby improving the seismic resistance of the fire pump 30. The fire pump 30 also includes a first flange and a second flange. The first flange is located at the inlet of the double volute pump body 32, and the second flange is located at the outlet of the double volute pump body 32. By providing the first flange and the second flange at the inlet and outlet of the double volute pump body 32 respectively, the center of gravity of the inlet and outlet pipes is effectively lowered, thereby reducing the vibration level. In addition, the first flange and the second flange are structurally reinforced and can withstand the superposition of 1 times the internal load and 2 times the external load under accident conditions, thereby further improving the seismic resistance of the fire pump 30 and enhancing the safety and reliability of the fire pump 30 under extreme conditions.

[0049] In some optional embodiments, the pump shaft 34 is a stepped shaft. It should be further noted that the stepped shaft design can be optimized using finite element method calculations, thereby improving the rigidity of the pump shaft 34 and effectively preventing torsional resonance. Simulation calculations were performed for different drive methods of the electric motor and diesel engine 20, ensuring that the fire pump 30 effectively avoids torsional resonance of the pump shaft 34 regardless of whether it is driven by the electric motor or the diesel engine 20.

[0050] In some optional embodiments, the pump shaft 34 includes a floating end 341 and a positioning end 342; the floating end 341 is axially floatingly disposed at one end of the double-volute pump body 32 via a first support assembly; the positioning end 342 is axially positioned at the other end of the double-volute pump body 32 via a second support assembly. This design can effectively avoid stress concentration in the pump shaft 34 caused by thermal expansion during the operation of the fire pump 30, thereby improving the reliability and service life of the pump shaft 34.

[0051] In some optional embodiments, the first support assembly includes a first bearing housing 371 and an axial floating bearing 372; the first bearing housing 371 is fixed to one end of the double volute pump body 32; the axial floating bearing 372 is assembled inside the first bearing housing 371, with the floating end 341 passing through the axial floating bearing 372. The axial floating bearing 372 can be a cylindrical roller bearing, which eliminates the risk of dry leakage and dry friction, simplifies maintenance, and offers high reliability.

[0052] In some optional embodiments, the second support assembly includes a second bearing housing 381, a bearing 382, ​​and an end-face locking member 383; the second bearing housing 381 is fixed to the other end of the double volute pump body 32; the bearing 382 is assembled inside the second bearing housing 381, and a positioning end 342 passes through the bearing 382; the end-face locking member 383 is disposed on the end face of the bearing 382 for axially locking the bearing 382. The end-face locking member 383 can be a lock nut.

[0053] In some optional embodiments, a sensor interface 39 is provided on the second bearing housing 381 for installing a temperature sensor or a vibration sensor to achieve remote real-time monitoring of the operating status of the fire pump 30.

[0054] In some optional embodiments, the cartridge mechanical seal assembly 36 includes a bushing 361, a mechanical seal gland 362, and a water baffle 363; the bushing 361 is fitted onto the pump shaft 34 and located inside the double volute pump body 32; the mechanical seal gland 362 is fitted onto the pump shaft 34 and located outside the double volute pump body 32; and the water baffle 363 is fitted onto the pump shaft 34 and located outside the mechanical seal gland 362.

[0055] In some optional embodiments, the double volute pump body 32, pump cover 33, pump shaft 34 and double suction impeller 35 are made of duplex stainless steel, and redundancy is added to ensure that their design service life is not less than 60 years.

[0056] In some alternative embodiments, an external drive device is connected to the end of the pump shaft 34, which is an electric motor or a diesel engine.

[0057] In some optional embodiments, the flow channels of the double-suction impeller 35 and the double-volute pump body 32 are optimized for overload and cavitation resistance using a three-dimensional flow calculation method, enabling the split-case centrifugal fire pump 30 with the following performance characteristics: (1) The flow-head curve is smooth without humps, and the head at the shut-off point is less than 140% of the rated head.

[0058] (2) Under negative pressure conditions at the inlet, the head at 150% of the rated flow rate is greater than 65% of the rated head.

[0059] (3) Under positive pressure conditions at the inlet, the shaft power on the flow-shaft power curve shows a significant downward trend after reaching its extreme value.

[0060] (4) The required net positive suction head (NPSHr) at rated flow rate is less than 4 meters, and the required net positive suction head at 150% of rated flow rate is less than 6 meters.

[0061] In some alternative embodiments, the outer periphery of the coupling 40 is provided with a coupling guard 50. See Appendix. Figure 5As shown, the coupling cover 50 includes a cover body 51 and a mounting bracket 52. The cover body 51 is a hollow structure, with one end connected to the diesel engine flywheel of the diesel engine 20 and the other end connected to the bearing seat of the fire pump 30. The bottom of the mounting bracket 52 is fixedly connected to the earthquake-resistant diesel engine fire pump set base 10, and the top of the mounting bracket 52 is provided with a mounting part 521, which is used to support and fix the cover body 51. Compared with the cantilever installation method commonly used in the prior art, this coupling cover 50 is connected at both ends, one end connected to the diesel engine flywheel disc and the other end connected to the bearing seat of the fire pump 30. At the same time, the cover body 51 is reliably supported by the mounting part 521 at the top of the mounting bracket 52, while the bottom of the mounting bracket 52 is fixedly connected to the earthquake-resistant diesel engine fire pump set base 10. This design enhances the overall stability of the coupling cover 50, effectively improves its seismic performance, and can effectively ensure the normal operation of the diesel engine 20 fire pump 30 set under earthquake conditions.

[0062] In some optional embodiments, the protective cover body 51 is a split-opening structure along the axial direction, including a first half-cover 511 and a second half-cover 512. The second half-cover 512 is detachably connected to the first half-cover 511, facilitating the installation and removal of the protective cover body 51. Optionally, the second half-cover 512 is detachably connected to the first half-cover 511 by bolts.

[0063] In some optional embodiments, both the first half-cover 511 and the second half-cover 512 include a telescopic section 513, a flywheel connecting part 514, and a bearing seat connecting part 515. The telescopic section 513 includes an inner cover and an outer cover arranged coaxially. The inner cover and the outer cover are axially telescopic through an adjusting member to accommodate changes in the installation distance between different models of diesel engines 20 and fire pumps 30. The flywheel connecting part 514 is located at the end of the inner cover and is used to connect with the diesel engine flywheel; the bearing seat connecting part 515 is located at the end of the outer cover and is used to connect with the bearing seat of the fire pump 30.

[0064] In some alternative embodiments, the cross-sections of the inner sleeve, outer sleeve, flywheel connection 514, and bearing seat connection 515 are all semi-circular.

[0065] In some alternative embodiments, the flywheel connection portion 514 is provided with a plurality of connection holes spaced apart along its circumference, and the cover body 51 is connected to the diesel engine flywheel through the connection holes by means of connectors (such as bolts).

[0066] In some optional embodiments, the outer wall of the inner cover is provided with a first connecting plate along its axial direction, and the first connecting plate is provided with first threaded holes at intervals; the corresponding position of the mounting part 521 is provided with a second threaded hole that mates with the first threaded hole, and the first half cover 511 and the second half cover 512 are connected to the mounting part 521 by bolts that pass through both the first threaded hole and the second threaded hole.

[0067] In some optional embodiments, the outer wall of the outer casing is provided with a second connecting plate along its axial direction, and the second connecting plate is provided with an axially extending elongated hole strip, which is locked by bolts when the outer casing moves to the target position.

[0068] In some optional embodiments, a buffer damping pad 53 (such as a rubber pad) is provided at the connection between the cover body 51 and the mounting part 521 to effectively absorb vibration energy and reduce the impact on the structure of the coupling cover 50.

[0069] In some optional embodiments, the protective cover body 51 is provided with ventilation and heat dissipation holes 54 so that the heat generated by the coupling 40 during operation can be dissipated in time to avoid overheating damage.

[0070] In some alternative embodiments, the mounting bracket 52 includes multiple uprights and multiple horizontal columns, with the uprights vertically fixed to the base 10 of the anti-vibration diesel engine fire pump set, and the horizontal columns connected between two adjacent uprights.

[0071] For some alternative embodiments, please refer to the appendix. Figure 6 As shown, the earthquake-resistant diesel engine fire pump set also includes a battery box 60, which comprises a box body 61 and a clamping member 62. The box body 61 has at least one partition plate 63 inside, dividing its interior into multiple placement chambers 64 for housing the battery pack. The clamping member 62 is detachably installed within each placement chamber 64, used to clamp the battery pack housed within it from above. This battery box 60, through its internal partitions and the clamping member 62, improves battery stability, thereby reducing battery displacement or collisions under severe conditions such as earthquakes, ensuring the normal operation of the diesel engine fire pump set. Furthermore, compared to installing the battery and diesel engine fire pump set together on the same base, placing the battery in the battery box 60 allows for flexible adjustment of its position according to site conditions, effectively avoiding direct contact between the battery and vibration sources (such as the diesel engine), and reducing vibration transmission.

[0072] In some alternative embodiments, the housing 61 includes a base plate 611, a plurality of side plates and a plurality of corner plates 613; the plurality of side plates surround the base plate 611; and the plurality of corner plates 613 are respectively connected between two adjacent side plates.

[0073] In some optional embodiments, the multiple side panels are a front side panel 6121, a left side panel 6122, a rear side panel 6123, and a right side panel 6124; both the left side panel 6122 and the right side panel 6124 are provided with vertical reinforcing ribs 65 extending in the vertical direction to improve the impact resistance of the left side panel 6122 and the right side panel 6124; both the front side panel 6121 and the rear side panel 6123 are provided with horizontal reinforcing ribs 66 extending in the horizontal direction to improve the impact resistance of the front side panel 6121 and the rear side panel 6123 and strengthen the structure of the box 61.

[0074] In some alternative embodiments, the horizontal reinforcing ribs 66 bend outward to form a support portion 67, and a handle 68 is provided on the support portion 67. The handle 68 facilitates on-site handling and position adjustment, enabling flexible arrangement of the battery box 60.

[0075] In some alternative embodiments, the corner plate 613 includes a first side, a second side, and a bottom plate; the second side is perpendicularly connected to the first side; and the bottom plate is connected between the first side and the second side.

[0076] In some optional embodiments, the base plate 611 of the housing 61 is higher than the bottom plate of the corner plate 613 and is spaced apart from the bottom plate to form a raised bottom space, which avoids the battery from directly contacting the ground, effectively prevents water, oil and other liquids from seeping in, and protects the battery from contamination and short circuit risks.

[0077] In some alternative embodiments, the clamping member 62 is a pressure plate, with both ends of the pressure plate detachably connected to the opposite side walls of the placement cavity 64. Specifically, the two ends of the pressure plate are connected to the side walls of the placement cavity 64 by bolts to achieve reliable clamping of the battery.

[0078] The earthquake-resistant diesel engine fire pump set provided in the above embodiments embodies a system-level integrated earthquake-resistant design, treating the earthquake-resistant diesel engine fire pump set base 10 and key components mounted on it as a complete system for collaborative earthquake-resistant design and verification. Through overall dynamic analysis, the compatibility and functional integrity of the earthquake-resistant diesel engine fire pump set base 10 and key components mounted on it under seismic loads are ensured. By optimizing the fixing methods of the earthquake-resistant diesel engine fire pump set base 10, diesel engine 20, fire pump 30, coupling cover 50, and battery box 60, and their components, the frequency range of the seismic response spectrum is effectively avoided, thereby controlling the dynamic response under seismic action within a safe range. Simultaneously, specialized earthquake-resistant reinforcement designs are implemented for the key subsystems ensuring the start-up and operation of the diesel engine 20, including earthquake-resistant design for the auxiliary starting system, earthquake-resistant design for the redundant starting system, and redundancy and earthquake-resistant design for the cooling water piping system. This ensures that electrical connections do not loosen and mechanisms do not jam under strong vibrations, meeting earthquake resistance requirements and ensuring the safety and reliability of the fire protection system.

[0079] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A seismic-resistant diesel engine fire pump set, characterized in that, include: An earthquake-resistant diesel engine fire pump set base includes a base frame and at least one reinforcing channel steel main beam disposed along the length of the base frame; The diesel engine, the main diesel engine, is fixedly mounted on the base of the anti-vibration diesel engine fire pump set via an integrated base; A fire pump is fixedly mounted on the base of the anti-vibration diesel engine fire pump set via pump feet. The fire pump and the diesel engine are driven and connected via a coupling. The fire pump includes a double volute pump body fixedly mounted on the pump feet, a pump cover connected to the double volute pump body and located above the double volute pump body, a pump shaft passing through the double volute pump body and the pump cover, and a double suction impeller mounted on the pump shaft.

2. The earthquake-resistant diesel engine fire pump set according to claim 1, characterized in that, The base frame includes two parallel and spaced vertical channel steel main beams and two parallel and spaced horizontal channel steel main beams, with the two horizontal channel steel main beams vertically connected between the two vertical channel steel main beams respectively. The reinforced channel steel main beam is arranged parallel between the two transverse channel steel main beams and is vertically connected between the two vertical channel steel main beams.

3. The earthquake-resistant diesel engine fire pump set according to claim 2, characterized in that, The base frame is equipped with a diesel engine mounting plate and a fire pump mounting plate. The diesel engine mounting plate includes a first diesel engine mounting plate and a second diesel engine mounting plate, which are symmetrically arranged on opposite sides of the reinforcing channel steel main beam. And / or, the fire pump mounting plate includes a first fire pump mounting plate and a second fire pump mounting plate, the first fire pump mounting plate and the second fire pump mounting plate being symmetrically arranged on opposite sides of the reinforcing channel steel main beam.

4. The earthquake-resistant diesel engine fire pump set according to claim 3, characterized in that, A first channel steel support is provided below the diesel engine mounting plate, and the first channel steel support is welded to the base frame. And / or, a second channel steel support is provided below the fire pump mounting plate, and the second channel steel support is welded to the base frame.

5. The earthquake-resistant diesel engine fire pump set according to claim 2, characterized in that, The base of the earthquake-resistant diesel engine fire pump set also includes a lifting device, which includes a lifting welded reinforcing plate, a lifting force-bearing pipe, and a lifting baffle. The lifting welded reinforcing plate is welded to the transverse channel steel main beam, the lifting force-bearing pipe is welded through the lifting welded reinforcing plate and the transverse channel steel main beam, and the lifting baffle is welded to the end of the lifting force-bearing pipe away from the lifting welded reinforcing plate. And / or, the base of the earthquake-resistant diesel engine fire pump set further includes an anchor bolt mounting structure welded to the transverse channel steel main beam. The anchor bolt mounting structure includes an anchor bolt mounting plate and an anchor bolt mounting plate reinforcing rib. The anchor bolt mounting plate is provided with anchor bolt mounting holes and leveling holes. The anchor bolt mounting plate reinforcing rib is welded to the anchor bolt mounting plate. And / or, the base of the earthquake-resistant diesel engine fire pump set further includes an angle steel fixing bracket, a channel steel fixing surface and a channel steel fixing beam. The angle steel fixing bracket is welded to the reinforcing channel steel main beam, the channel steel fixing surface is welded to the top surface of the transverse channel steel main beam, and the channel steel fixing beam is welded to the side of the transverse channel steel main beam.

6. The earthquake-resistant diesel engine fire pump set according to claim 1, characterized in that, The integrated base is welded from high-strength steel plates and includes a front support plate, a rear support plate, a left support plate, a right support plate, a top connecting plate, and a bottom connecting plate. Both the left and right support plates are equipped with reinforcing ribs.

7. The earthquake-resistant diesel engine fire pump set according to claim 1, characterized in that, The fire pump also includes a cartridge mechanical seal assembly, which is sleeved on the pump shaft and used to seal the gap between the pump shaft and the double volute pump body and the pump cover. And / or, the fire pump further includes a first flange and a second flange, the first flange being disposed at the inlet of the double volute pump body, and the second flange being disposed at the outlet of the double volute pump body.

8. The earthquake-resistant diesel engine fire pump set according to claim 7, characterized in that, The pump shaft is a stepped shaft, and the pump shaft includes: The floating end is axially floatingly disposed at one end of the double volute pump body via a first support component; The positioning end is axially positioned at the other end of the double volute pump body via the second support component.

9. The earthquake-resistant diesel engine fire pump set according to claim 1, characterized in that, The coupling is provided with a coupling guard on its outer periphery, the coupling guard comprising: The protective cover body has a hollow structure. One end of the protective cover body is connected to the diesel engine flywheel of the diesel engine, and the other end is connected to the bearing seat of the fire pump. The mounting bracket has its bottom fixedly connected to the base of the anti-vibration diesel engine fire pump set, and its top is provided with a mounting part for supporting and fixing the protective cover body.

10. The earthquake-resistant diesel engine fire pump set according to claim 1, characterized in that, It also includes a battery compartment, which comprises: The box body has at least one partition plate inside to divide the inner cavity of the box body into multiple placement cavities for accommodating batteries; A clamping element, detachably disposed within the placement cavity, is used to clamp the battery housed within the placement cavity from above.

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