Horizontal centrifugal pump set with anti-freezing function

Abstract

This utility model discloses a horizontal centrifugal pump unit with antifreeze function, belonging to the technical field of centrifugal pump units. The utility model includes a base, a protective cover connected to the top of the base, and side guards connected to both sides of the inner side of the protective cover. Reinforcing ribs are connected to both sides of the outer surface and back of the protective cover. Limiting bolts connect the protective cover to the base. Through the design of the protective cover, which has an n-shaped longitudinal section and a rectangular cross-section, this utility model presents a double-layer structure formed by a single thin steel plate. Compared to traditional single-layer thin steel plate protective covers, this structure forms a double-layer protective form with redundancy, effectively increasing protective strength and reducing the risk of sharp fragments penetrating the protective cover and becoming exposed when the coupling is worn or damaged. When the outer side of the protective cover is dented due to impact, it is less likely to affect the inner side of the protective cover, reducing the phenomenon of dents on the outer side and bulges on the inner side affecting the coupling; thus improving protection.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump set technology, specifically a horizontal centrifugal pump set with antifreeze function. Background Technology

[0002] Horizontal centrifugal pump sets are commonly used fluid transport equipment in industrial production, municipal water supply, chemical transportation and other fields. Its core components include a base, motor, pump body volute, impeller, inlet, outlet, mechanical seal, coupling and other parts. During operation, the motor transmits power to the pump body through the coupling, driving the impeller inside the pump body to rotate, thereby completing the suction and transport of fluid. It is a key piece of equipment in various fluid circulation systems.

[0003] In existing horizontal centrifugal pump sets, the protective cover of the coupling is mostly made of a single layer of thin steel plate directly bent into an "n" shape. The overall structural strength is low. When the coupling is damaged due to wear or failure, and sharp fragments fly out, the protective cover is at risk of being punctured by the sharp fragments. This increases the risk of workers being scratched during disassembly, maintenance, and handling. In addition, when subjected to external impact, the single layer of thin plate is prone to deformation and dent. If the dent is far away from the coupling area, it has little impact. However, if the dent is close to the coupling area, the inner layer of the protective cover may rub against or collide with the coupling. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a horizontal centrifugal pump set with antifreeze function to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a horizontal centrifugal pump unit with antifreeze function, including a base, a protective cover connected to the top of the base, and side guard plates connected to both sides inside the protective cover, reinforcing ribs connected to both sides of the outer surface and the back of the protective cover, and limit bolts connecting the protective cover and the base.

[0006] By adopting the above technical solutions, the protective cover can provide a wrap-around protection for the coupling between the pump body and the motor, preventing the exposure of fragments caused by wear or failure during operation of the coupling; at the same time, the side guard plate inside the protective cover can enhance its internal structural strength, the reinforcing ribs on the outside and back can improve the overall resistance to deformation, and the limiting bolts can achieve a stable connection between the protective cover and the base.

[0007] Furthermore, both the protective cover and the side guard plate have an "n" shaped longitudinal section, and the protective cover has a rectangular cross-section.

[0008] By adopting the above technical solution, the design of the protective cover with an n-shaped longitudinal section and a rectangular cross section can form a double-layer protective structure through a single thin steel plate bending process. This not only expands the coverage and protection range of the lower coupling, but also creates protective redundancy. The n-shaped structure of the side guard plate can be adapted to the inner contour of the protective cover, which can fit tightly and enhance the bending resistance of the inner side of the protective cover, avoid deformation caused by unilateral force, and the smooth bending contour can reduce the risk of scratches to the workers during operation.

[0009] Furthermore, the protective cover is detachably connected to the base via limiting bolts.

[0010] By adopting the above technical solution, the limitations of the traditional fixed connection of the protective cover are broken. When the protective cover is damaged by the impact of debris or the internal coupling needs to be inspected and maintained, the staff can directly remove the limit bolts and take off the protective cover without disassembling other parts. This not only reduces the maintenance cost of replacing the protective cover, but also provides sufficient operating space for the maintenance of the coupling and improves maintenance efficiency.

[0011] Furthermore, a pump body and a motor are respectively installed on the top two sides of the base, and a bracket is connected to one side of the pump body, and a coupling is connected between the pump body and the motor.

[0012] By adopting the above technical solution, the motor serves as the power source, and the torque is transmitted to the pump body through the coupling, driving the impeller inside the pump body to rotate and realize fluid intake and transportation.

[0013] Furthermore, the length of the coupling is less than the distance between the two side guards, and the coupling is located below the protective cover and between the two side guards.

[0014] By adopting the above technical solution, it is possible to ensure that the coupling can rotate freely between the two side guards, avoiding friction between the side guards and the coupling during operation; at the same time, the side guards can form a lateral barrier, so that when the coupling fragments bounce off the inside of the protective cover, the side guards can prevent the fragments from being ejected axially, reducing the risk of fragments hitting the motor or bracket, and supplementing the axial protection dimension of the protective cover.

[0015] Furthermore, the protective cover, side guards, and reinforcing ribs are all made of Q235 carbon steel, and the protective cover is formed by multiple bending processes. The side guards and reinforcing ribs are fixedly connected to the protective cover by welding.

[0016] By adopting the above technical solutions, Q235 carbon steel has good machinability and can be precisely formed into a double-layer structure of the protective cover through multiple bending processes without complex splicing. At the same time, it has high mechanical strength, which can meet the requirements of debris blocking and deformation resistance. The side guards and reinforcing ribs are fixed by welding, which can eliminate the connection gaps, improve the overall structural rigidity of the three and the protective cover, avoid the loosening of components due to vibration during long-term operation, and extend the service life of the protective structure.

[0017] Furthermore, the protective cover, side panels, and reinforcing ribs are all coated with epoxy primer and acrylic polyurethane topcoat.

[0018] By adopting the above technical solutions, epoxy primer can enhance the adhesion between the coating and carbon steel substrate, forming a bottom anti-corrosion barrier to prevent moisture and impurities in the air from contacting the substrate; the outer acrylic polyurethane topcoat has excellent weather resistance and wear resistance, can resist oil and dust corrosion in the industrial environment, reduce the strength reduction of components due to rust or wear, and further extend the service life of the protective structure.

[0019] Furthermore, the outer wall of the pump body includes a pump housing, and an electric heating tape is laid on the outside of the pump housing. The electric heating tape is wrapped with an insulation layer, and a cable tie is connected to the outside of the insulation layer. A temperature sensor is inserted through the bottom of the pump body.

[0020] By adopting the above technical solutions, the temperature sensor can monitor the internal temperature of the pump body in real time, providing data for antifreeze control; the electric heating tape is attached to the pump shell and can release heat when the temperature is too low to prevent the medium inside the pump from freezing; the insulation layer wraps the electric heating tape, which can reduce heat loss, isolate the external low temperature, and avoid frequent start-up of the electric heating tape; the cable ties can tightly fix the insulation layer to the pump shell to prevent the insulation layer from falling off due to long-term vibration, and ensure that the antifreeze function is continuously effective.

[0021] Furthermore, the electric heating cable is a self-regulating electric heating cable or a constant power electric heating cable, and the temperature sensor is an armored PT100 platinum resistance temperature sensor, and the insulation layer is aluminum foil rubber and plastic insulation cotton.

[0022] By adopting the above technical solutions, the self-regulating heating cable can automatically adjust its power according to the ambient temperature to avoid local overheating, while the constant power heating cable is suitable for continuous heating in low-temperature environments. The two types are suitable for different application scenarios. The armored PT100 platinum resistance temperature sensor has the characteristics of high precision and vibration resistance, which can accurately reflect the pump body temperature. It also has strong impact resistance and adapts to the pump unit operating environment. The aluminum foil rubber and plastic insulation cotton has both flexibility and heat preservation properties. It can closely fit the curved surface of the pump shell, and is lightweight and not easy to age. It improves the heat preservation effect while reducing the extra load on the pump body.

[0023] Furthermore, the motor, temperature sensor, and electric heating cable are all electrically connected to an external control cabinet.

[0024] By adopting the above technical solution, the external control cabinet can receive temperature data transmitted by the temperature sensor. When the pump body temperature is detected to be lower than the set threshold, the electric heating cable will be automatically activated. At the same time, the operating status of the motor can be coordinated to avoid damage caused by starting the motor under load at low temperatures. In addition, the staff can view the operating parameters of each component in real time through the control cabinet, which will facilitate the timely detection of abnormalities, improve the intelligence and reliability of the pump group operation, and ensure stable delivery in low-temperature environments.

[0025] In summary, the present invention has the following main advantages: 1. This utility model features a protective cover with an "n"-shaped longitudinal section and a rectangular cross-section, forming a double-layer structure from a single thin steel plate. Compared to traditional single-layer thin steel plate protective covers, this structure provides redundant protection, effectively increasing protective strength and reducing the risk of sharp fragments penetrating the cover and becoming exposed when the coupling is worn or damaged. Furthermore, when the outer side of the cover is dented, it is less likely to affect the inner side, reducing the likelihood of dents on the outer side and bulges on the inner side affecting the coupling. Simultaneously, the bends on both sides of the cover create smooth, rounded corners, replacing the sharp edges of traditional thin steel plates, further reducing hand injuries during disassembly, maintenance, and handling, improving operational safety, and enhancing protection. 2. This utility model, through the setting of side guards and reinforcing ribs, with the side guards fixed to both sides inside the protective cover and the distance between the two guards being greater than the length of the coupling, can not only enhance the overall structural strength of the inner side of the protective cover and improve its bending resistance, but also block some of the fragments that bounce off the protective cover and fly out axially, reducing the risk of fragments hitting the motor and bracket after bouncing off axially. The reinforcing ribs are fixed to both sides of the outer surface and the back of the protective cover by welding, which can significantly improve the structural stability and bending resistance of the outer side of the protective cover, reduce the deformation of the protective cover caused by external impacts, and thus reduce the risk of friction and impact between the inner layer of the protective cover and the coupling, extending the service life of the core components of the equipment; and increasing the structural bending resistance. 3. By using limiting bolts, this utility model allows workers to easily remove and replace the protective cover when it wears out due to long-term use or is damaged by impacts from debris, reducing maintenance difficulty and cost. Simultaneously, during maintenance operations such as coupling repairs on the centrifugal pump unit, the limiting bolts can be removed to expose the coupling, providing ample space for maintenance operations and effectively improving equipment maintenance efficiency; thus facilitating maintenance. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the explosion structure of the protective cover of this utility model; Figure 3 This is a schematic diagram of the protective cover structure of this utility model; Figure 4 This is a bottom view of the protective cover structure of this utility model; Figure 5 This is a schematic cross-sectional view of the protective cover of this utility model; Figure 6 This is a partial structural diagram of the insulation layer of this utility model.

[0027] In the diagram: 1. Base; 2. Motor; 3. Pump body; 4. Bracket; 5. Coupling; 6. Protective cover; 7. Limit bolt; 8. Side guard plate; 9. Reinforcing rib; 10. Temperature sensor; 301. Pump housing; 302. Electric heating tape; 303. Insulation layer; 304. Cable tie. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The embodiments of this utility model will be described below based on its overall structure.

[0030] Example 1:

[0031] A horizontal centrifugal pump set with antifreeze function, such as Figures 1-5As shown, the system includes a base 1, with a protective cover 6 connected to the top of the base 1. The protective cover 6 has a rectangular cross-section, and side guard plates 8 are connected to both sides inside the protective cover 6. Both the protective cover 6 and the side guard plates 8 have an "n"-shaped longitudinal section. During the operation of the pump unit, the protective cover 6 provides core protection for the internal coupling 5. The protective cover 6 has an "n"-shaped longitudinal section and a rectangular cross-section, forming a double-layer structure. Compared with the traditional single-layer thin steel plate protective cover 6, the double-layer structure can create protective redundancy. When the coupling 5 produces sharp fragments due to wear or failure, it can reduce the number of fragments. The design minimizes the risk of the protective cover 6 being exposed and reduces the risk of friction and impact between the inner layer of the protective cover 6 and the coupling 5 caused by external force collisions, thus ensuring the service life of the coupling 5 and the core components of the pump unit. Simultaneously, the bending process creates smooth rounded corners on both sides of the protective cover 6, replacing the sharp edges of traditional thin steel plates, reducing the likelihood of hand injuries to workers during disassembly, maintenance, and handling. The length of the coupling 5 is less than the distance between the two side guard plates 8, and the coupling 5 is located below the protective cover 6 and between the two side guard plates 8. The side guards 8 fixed on both sides of the interior are spaced further apart than the length of the coupling 5. This not only enhances the overall structural strength and bending resistance of the inner side of the protective cover 6, but also blocks some of the debris that bounces back after colliding with the protective cover 6, thus reducing the risk of debris ejecting axially and striking the motor 2 or the bracket 4. Reinforcing ribs 9 are connected to both sides of the outer surface and the back of the protective cover 6. These reinforcing ribs 9, fixed by welding, further enhance the structural stability and bending resistance of the external structure of the protective cover 6, reducing the risk of overall bending deformation caused by external impacts. Limit bolts 7 connect the protective cover 6 to the base 1. The protective cover 6 is detachably connected to the base 1 via these limit bolts 7. When maintenance work such as overhauling the coupling 5 is required for the centrifugal pump unit, the workers can remove the limit bolts 7 to remove the protective cover 6, fully exposing the coupling 5 and providing ample space for maintenance operations. When the protective cover 6 becomes worn due to long-term use or is damaged by debris impacts, it can also be replaced by removing the limit bolts 7, effectively reducing maintenance difficulty and cost, and improving maintenance efficiency.

[0032] See Figure 1 and Figure 2 In the above embodiment, a pump body 3 and a motor 2 are respectively installed on the top two sides of the base 1. The motor 2 is electrically connected to an external control cabinet. A bracket 4 is connected to one side of the pump body 3. A coupling 5 is connected between the pump body 3 and the motor 2. The base 1 serves as the load-bearing foundation of the overall structure, providing stable support for the motor 2 and pump body 3 installed on the top. After the motor 2 starts, it transmits power to the pump body 3 through the coupling 5, driving the impeller inside the pump body 3 to rotate to complete the suction and delivery of fluid, reducing fluid leakage from the direction of the motor 2 during delivery, and ensuring the stable realization of the pump set's basic delivery function.

[0033] Example 2:

[0034] Based on the above embodiment one, in order to facilitate processing and improve structural stability, the following settings are now adopted.

[0035] See Figures 1-5 In the above embodiments, the protective cover 6, side guards 8, and reinforcing ribs 9 are all made of Q235 carbon steel. The protective cover 6 is formed by multiple bending, and a single thin steel plate is formed into a double-layer structure through multiple bending. Compared with the traditional single-layer thin steel plate protective cover 6, the double-layer structure can create protective redundancy. The side guards 8 and reinforcing ribs 9 are fixedly connected to the protective cover 6 by welding, which increases the connection stability. The surfaces of the protective cover 6, side guards 8, and reinforcing ribs 9 are all coated with epoxy primer and acrylic polyurethane topcoat to increase corrosion resistance.

[0036] Example 3:

[0037] Based on the above embodiment one, the following settings are now implemented to improve antifreeze performance.

[0038] See Figure 1 , Figure 2 and Figure 6 In the above embodiment, the outer wall of the pump body 3 includes a pump housing 301, and an electric heating tape 302 is laid on the outside of the pump housing 301. The electric heating tape 302 is a self-regulating electric heating tape or a constant power electric heating tape. The electric heating tape 302 is wrapped with an insulation layer 303, which is aluminum foil rubber and plastic insulation cotton. The insulation layer 303 is connected to the outside of the insulation layer 303 by cable ties 304. A temperature sensor 10 is inserted through the bottom of the pump body 3. The temperature sensor 10 is an armored PT100 platinum resistance temperature sensor. Both the temperature sensor 10 and the electric heating tape 302 are electrically connected to an external control cabinet. When used in low-temperature environments in winter, the armored PT100 platinum resistance temperature sensor inserted through the bottom of the pump body 3... The sensor 10 monitors the temperature of the pump body 3 in real time and transmits the data to an external control cabinet. The self-limiting or constant power electric heating cable 302 and the motor 2, which are attached to the outside of the pump housing 301, are also electrically connected to the control cabinet to achieve coordinated control. When the temperature sensor 10 detects that the temperature of the pump body 3 is too low, the control cabinet will activate the electric heating cable 302 to heat the pump body 3, reducing the risk of the medium inside the pump body 3 freezing. The insulation layer 303 can reduce the heat dissipation generated by the electric heating cable 302, and at the same time reduce the impact of the external low temperature environment on the pump body 3, ensuring the normal operation of the pump group under low temperature conditions. The cable tie 304 binds the insulation layer 303 to a fixed position, reducing the risk of the insulation layer 303 falling off.

[0039] The implementation principle of this utility model is as follows: First, the base 1 serves as the supporting foundation of the overall structure, which firmly supports the motor 2 and pump body 3 installed on the top. After the motor 2 starts, it transmits power to the pump body 3 through the coupling 5, driving the impeller inside the pump body 3 to rotate to complete the suction and transportation of fluid, reducing the leakage of fluid from the direction of the motor 2 during the transportation process, and ensuring the stable realization of the pump set's basic transportation function. During pump unit operation, the protective cover 6 provides core protection for the internal coupling 5. The protective cover 6 has an n-shaped longitudinal section and a rectangular cross-section, and is a double-layer structure formed by multiple bends of a single thin steel plate. Compared to the traditional single-layer thin steel plate protective cover 6, the double-layer structure provides redundancy in protection. When sharp fragments of the coupling 5 break off due to wear or failure, it reduces the risk of fragments penetrating the protective cover 6 and becoming exposed, as well as the risk of friction and collision between the inner layer of the protective cover 6 and the coupling 5 caused by external impacts. This ensures the service life of the coupling 5 and the core components of the pump unit. Simultaneously, the bending process creates smooth rounded corners on both sides of the protective cover 6, replacing the traditional... The sharp edges of the thin steel plate reduce the risk of hand injuries to workers during disassembly, maintenance, and handling. Furthermore, the side plates 8 fixed to both sides inside the protective cover 6 have a spacing greater than the length of the coupling 5. This enhances the overall structural strength and bending resistance of the inner side of the protective cover 6, while also preventing some of the debris from rebounding after impact with the protective cover 6, thus reducing the risk of debris ejecting axially and striking the motor 2 or bracket 4. The reinforcing ribs 9, welded to both sides of the outer surface and back of the protective cover 6, further improve the structural stability and bending resistance of the outer side of the protective cover 6, reducing the likelihood of overall bending deformation caused by external impacts.

[0040] When maintenance work such as overhauling the coupling 5 is required on the centrifugal pump unit, the staff can remove the limit bolt 7 and remove the protective cover 6 to fully expose the coupling 5, providing sufficient space for maintenance operations. When the protective cover 6 is worn due to long-term use or damaged by debris impact, a new protective cover 6 can also be replaced by removing the limit bolt 7, effectively reducing maintenance difficulty and cost and improving maintenance efficiency.

[0041] Meanwhile, the protective cover 6, side guard plate 8, and reinforcing rib 9 are all made of carbon steel Q235. This material has good machinability and is easy to form the protective cover 6 through bending process. The side guard plate 8 and reinforcing rib 9 are fixedly connected to the protective cover 6 by welding, which can further improve the connection strength between the three. The surfaces of the three are also coated with epoxy primer and acrylic polyurethane topcoat, which can enhance the corrosion resistance of the components and extend the overall service life of the protective structure.

[0042] When used in low-temperature environments during winter, the armored PT100 platinum resistance temperature sensor 10, which runs through the bottom of the pump body 3, monitors the temperature of the pump body 3 in real time and transmits the data to the external control cabinet. The self-limiting or constant power electric heating cable 302 and the motor 2, which are laid on the outside of the pump housing 301, are also electrically connected to the control cabinet to achieve coordinated control. When the temperature sensor 10 detects that the temperature of the pump body 3 is too low, the control cabinet will activate the electric heating cable 302 to heat the pump body 3, reducing the risk of the medium inside the pump body 3 freezing. The insulation layer 303 can reduce the heat dissipation generated by the electric heating cable 302, and at the same time reduce the impact of the external low-temperature environment on the pump body 3, ensuring the normal operation of the pump group under low-temperature conditions. The cable tie 304 binds the insulation layer 303 to limit its position, reducing the risk of the insulation layer 303 falling off.

[0043] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A horizontal centrifugal pump unit with antifreeze function, comprising a base (1), characterized in that: The base (1) is connected to a protective cover (6) at the top, and the protective cover (6) is connected to side guards (8) on both sides inside. The protective cover (6) is connected to reinforcing ribs (9) on both sides of the outer surface and the back. The protective cover (6) is connected to the base (1) with limit bolts (7).

2. The horizontal centrifugal pump set with antifreeze function according to claim 1, characterized in that: The longitudinal section of the protective cover (6) and the side guard plate (8) is "n" shaped, and the cross section of the protective cover (6) is rectangular.

3. The horizontal centrifugal pump set with antifreeze function according to claim 2, characterized in that: The protective cover (6) is detachably connected to the base (1) via a limiting bolt (7).

4. The horizontal centrifugal pump set with antifreeze function according to claim 1, characterized in that: The base (1) has a pump body (3) and a motor (2) installed on its top two sides respectively, and a bracket (4) is connected to one side of the pump body (3), and a coupling (5) is connected between the pump body (3) and the motor (2).

5. The horizontal centrifugal pump set with antifreeze function according to claim 4, characterized in that: The length of the coupling (5) is less than the distance between the two side guards (8), and the coupling (5) is located below the protective cover (6) and between the two side guards (8).

6. The horizontal centrifugal pump set with antifreeze function according to claim 2, characterized in that: The protective cover (6), side guard plate (8) and reinforcing rib (9) are all made of carbon steel Q235, and the protective cover (6) is formed by multiple bending. The side guard plate (8) and reinforcing rib (9) are fixedly connected to the protective cover (6) by welding.

7. The horizontal centrifugal pump set with antifreeze function according to claim 6, characterized in that: The protective cover (6), side guard plate (8) and reinforcing rib (9) are all coated with epoxy primer and acrylic polyurethane topcoat.

8. The horizontal centrifugal pump set with antifreeze function according to claim 4, characterized in that: The outer wall of the pump body (3) includes a pump housing (301), and an electric heating tape (302) is laid on the outside of the pump housing (301), and an insulation layer (303) is wrapped around the outside of the electric heating tape (302), and a cable tie (304) is connected to the outside of the insulation layer (303). A temperature sensor (10) is inserted through the bottom of the pump body (3).

9. The horizontal centrifugal pump set with antifreeze function according to claim 8, characterized in that: The electric heating cable (302) is a self-regulating electric heating cable or a constant power electric heating cable, and the temperature sensor (10) is an armored PT100 platinum resistance temperature sensor. The insulation layer (303) is aluminum foil rubber and plastic insulation cotton.

10. The horizontal centrifugal pump set with antifreeze function according to claim 9, characterized in that: The motor (2), temperature sensor (10) and electric heating tape (302) are all electrically connected to the external control cabinet.

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