Low-liquid-level self-balancing high-temperature submerged pump
The low-level self-balanced high-temperature under-liquid pump designed with a spiral double volute pump body and impeller inverted design solves the problems of thermal deformation and safe operation of the pump under high-temperature under-liquid pump, and achieves efficient suction and safe and reliable pump operation.
Patent Information
- Application Number
- CN202422578290.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-24
AI Technical Summary
The existing high-temperature liquid pumps have severe thermal deformation under high temperature conditions, insufficient suction performance, and risk of safe operation and potential media splashing.
The spiral double volute pump body is designed, the impeller is set up inverted, the suction port is suctioned in the upper axial side, the outlet is spiral upward and eccentric, and the discharge outlet is spiral upward and then discharged in the axial direction. An empty valve is designed at the bottom, and a back blade is installed on the rear cover of the impeller. The back blade rotates synchronously with the impeller, and an empty valve is installed at the bottom of the pump body.
It effectively avoids thermal deformation under high temperature conditions, reduces the starting liquid level, improves suction performance, reduces the risk of evacuation, avoids medium splashing, and improves the safety, reliability and economical operation.
Smart Images
Figure CN223136420U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-temperature submerged pump, in particular to a low-level self-balancing high-temperature submerged pump that effectively avoids the thermal deformation problem of existing products under high-temperature conditions, improves the suction performance of the pump, and operates safely and reliably. Background Art
[0002] High-temperature submerged pumps are specifically used for transporting various media under high-temperature conditions and are widely used in pumping systems for various high-temperature molten salts, liquid metals, organic and inorganic compounds. The temperature of such media can reach up to 500 °C or even higher, and the media usually have certain corrosiveness.
[0003] In a high-temperature medium transportation system, as one of the most critical devices, high-temperature submerged pumps have stringent requirements for pump design, material selection, technology, etc. due to their need to operate under high-temperature conditions for a long time. In actual operation, if a high-temperature submerged pump fails and causes a shutdown accident, it will cause significant economic losses or serious safety accidents to the operation of the entire system.
[0004] Most of the existing high-temperature submerged pumps adopt an axial downward suction and lateral discharge submerged suspension pump design. Since this type of pump uses a single volute design, the pump cannot effectively balance the radial force, and the existing design separates the drain pipe and the protective pipe, resulting in serious thermal deformation of the pump under high-temperature conditions, which in turn leads to the occurrence of other safe operation risks.
[0005] Existing high-temperature submerged pumps have axial force due to the different areas of the front and rear covers of the impeller. Although there are various existing methods for balancing the axial force, these measures are all achieved by increasing production and processing costs or reducing the pump performance.
[0006] Existing high-temperature submerged pumps all adopt the axial downward suction and radial discharge method of the impeller, which significantly increases the liquid level during pump startup and poses a potential safety hazard of insufficient suction and cavitation during operation.
[0007] Existing high-temperature submerged pumps all adopt the gravity drainage method to discharge the internal medium. Although such a scheme is simple and can effectively achieve the drainage of the medium, during the pump disassembly process, safety hazards such as splashing may occur. Summary of the Utility Model
[0008] Aiming at the above problems, the main purpose of the utility model is to provide a low-level self-balancing high-temperature submerged pump that effectively avoids the thermal deformation problem of existing products under high-temperature conditions, improves the suction performance of the pump, and operates safely and reliably.
[0009] The present utility model solves the above technical problems through the following solutions: A low-level self-balancing high-temperature submersible pump, the suction inlet of the pump body of the low-level self-balancing high-temperature submersible pump is axially upward suction, and the discharge port is axially discharged after spiral upward eccentricity. The low-level self-balancing high-temperature submersible pump adopts a spiral double volute pump body, the center line of the pump body outlet is concentric with the drain pipe component, and the design centers of both coincide with the operating center line of the pump rotor component;
[0010] The impeller in the low-level self-balancing high-temperature submersible pump is arranged upside down. The impeller includes a front cover plate and a rear cover plate. A back vane is arranged on the rear cover plate of the impeller, and the back vane rotates synchronously with the impeller. A drain valve is arranged at the bottom of the pump body.
[0011] In a specific embodiment of the present utility model, the impeller is fixed to the pump shaft through a locking nut, and the key on the pump shaft cooperates with the impeller to transmit the torque of the prime mover to the rotor component. The impeller inlet is axially upward suction.
[0012] In a specific embodiment of the present utility model, the drain pipe component includes a support protection pipe and a drain pipe, which jointly provide safe support for the operation of the pump.
[0013] In a specific embodiment of the present utility model, the drain valve includes a valve core, a gasket, a spring, a valve seat and a valve cover; the gasket is installed on the valve core, the spring is installed on the valve seat, the valve core and the valve seat are connected by threads, and the valve cover and the pump cover are connected by threads; the gasket is installed in cooperation with the pump cover.
[0014] In a specific embodiment of the present utility model, the pump body is connected to the drain pipe component through a flange and bolts.
[0015] The positive and progressive effects of the present utility model are as follows: Compared with common similar technologies, the double volute spiral pump body and drain pipe assembly of the present utility model effectively avoid the thermal deformation problem of existing products at high temperatures. The inverted design of the impeller and the design of the spiral double volute pump body enable the pump body to form a liquid accumulation tank mode by self-heating, effectively reducing the pump startup liquid level, improving the pump suction performance, and reducing the risk of cavitation. The drain valve is designed at the bottom of the pump body, which avoids the splashing of the medium and effectively reduces the safety risk while ensuring that the internal medium of the pump is completely drained. Compared with existing products, it has a compact design, safe and reliable operation, low failure risk, low maintenance cost, and better economy. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the low-level self-balancing high-temperature submersible pump proposed by the present utility model.
[0017] Figure 2 It is a schematic diagram of the structure at the drain valve in the present utility model.
[0018] Figure 3 This is the front view of the impeller in the present utility model.
[0019] Figure 4 This is the sectional view of the impeller in the present utility model. Specific embodiments
[0020] The following presents the preferred embodiments of the present utility model in conjunction with the attached drawings to elaborate in detail on the technical solutions of the present utility model.
[0021] Figure 1 This is the overall structural schematic diagram of the low-level self-balancing high-temperature submerged pump proposed by the present utility model. Figure 2 This is the structural schematic diagram at the drain valve in the present utility model. As Figure 1-2 shown: A low-level self-balancing high-temperature submerged pump proposed by the present utility model, the pump body suction port of the low-level self-balancing high-temperature submerged pump is axially upward suction, and the discharge port is axially discharged after spiral rising and eccentric. The low-level self-balancing high-temperature submerged pump adopts a spiral double volute pump body.
[0022] Figure 3 This is the front view of the impeller in the present utility model. Figure 4 This is the sectional view of the impeller in the present utility model. As Figure 3-4 shown: The impeller 4 in the low-level self-balancing high-temperature submerged pump proposed by the present utility model is arranged upside down. The impeller 4 includes a front cover plate 401 and a rear cover plate 402. A back vane 403 is arranged on the rear cover plate 402 of the impeller 4. The back vane 403 rotates synchronously with the impeller. A drain valve 2 is arranged at the bottom of the pump body 5.
[0023] The impeller 4 is fixed to the pump shaft 7 through a locking nut 3. The key on the pump shaft 7 cooperates with the impeller 4 to transmit the torque of the prime mover to the rotor component 8. The inlet of the impeller 4 is axially upward suction.
[0024] The liquid discharge pipe component 6 includes a support protection pipe 601 and a liquid discharge pipe 602, which jointly provide safety support for the operation of the pump.
[0025] The drain valve 2 in the present utility model includes a valve core 201, a gasket 202, a spring 203, a valve seat 204 and a valve cover 205. The gasket 202 is installed on the valve core 201, the spring 203 is installed on the valve seat 204. The valve core 201 and the valve seat 204 are threadedly connected. The valve cover 205 is threadedly connected to the pump cover 1 to prevent the valve group from falling off; the gasket 202 is installed in cooperation with the pump cover 1 to prevent liquid leakage during operation.
[0026] The present utility model includes a pump cover 1, a drain valve 2, a locking nut 3, an impeller 4, a pump body 5, a liquid discharge pipe component 6, a pump shaft 7, a rotor component 8, a liquid throwing wheel 9, a foundation component 10, a sealing component 11, a bearing component 12, a motor bracket 13.
[0027] The locking nut 3, impeller 4, pump shaft 7, liquid-throwing wheel, bearing, etc. of the present utility model together constitute the rotor component 8 of the pump.
[0028] The pump body 5 of the present utility model has an axial upper-side suction at the pump body suction port and an axial discharge after a spiral upward eccentricity at the discharge port. The center line of the outlet of the pump body 5 is concentric with the liquid discharge pipe component 6, and the design centers of both coincide with the operating center line of the pump rotor component 8. The pump body 5 adopts a double volute design, which can not only ensure the high efficiency of the hydraulic design but also balance the radial force and the uneven characteristics of the high-temperature deformation of the pump body in terms of structure. The pump body 5 is connected to the liquid discharge pipe component 6 through a flange and bolts.
[0029] In the present utility model, the impeller 4 is fixed on the pump shaft 7 through the locking nut 3. The key on the pump shaft 7 cooperates with the impeller 4 to transmit the torque of the prime mover to the rotor component 8. The inlet of the impeller 4 is axially upward suction.
[0030] In the present utility model, the inverted design of the impeller 4 and the spiral double volute pump body 5 design enable the pump body 5 to form a liquid accumulation tank mode by self-heating, effectively reducing the starting liquid level of the submerged pump, improving the suction performance of the pump, and reducing the risk of cavitation.
[0031] In the present utility model, the liquid discharge pipe component 6 is composed of a support protection pipe 601 and a liquid discharge pipe 602 together to provide safe support for the operation of the pump.
[0032] The drain valve 2 of the present utility model avoids the splashing of the medium while ensuring the complete drainage of the medium inside the pump, effectively reducing the safety risk.
[0033] Most of the existing high-temperature submerged pumps adopt an axial downward suction and lateral discharge submerged suspended pump design. Since this type of pump adopts a single volute design, the pump cannot effectively balance the radial force, and the existing design separates the liquid discharge pipe and the protection pipe, resulting in serious thermal deformation of the pump under high-temperature conditions, and further leading to the occurrence of other safe operation risks.
[0034] The solution of the present utility model is to effectively advance the distance between the liquid discharge pipe and the pump rotor center through a specially designed spiral double volute pump body, so that the overall center of gravity of the pump coincides with the center line of the pump rotor, and the operation of the pump is more stable. The spiral double volute pump body design makes the axial and radial thermal expansion of the pump body more uniform, and also makes the radial force during the operation of the pump self-balanced and controllable, fundamentally solving the radial instability factor and increasing the reliability of the pump operation.
[0035] The existing high-temperature submerged pumps have axial force due to the different areas of the front and rear covers of the impeller. Although there are various existing methods for balancing the axial force, these measures are all achieved by increasing the production and processing cost or reducing the pump performance.
[0036] The solution of the present utility model is to design the impeller to be inverted and suck from the upper side. Compared with the existing axial downward suction design, the axial force generated by the impeller can effectively balance the gravity of the rotor itself, thereby reducing the load on the upper bearing and the risk of bearing failure. In addition, back vanes are designed on the rear cover plate of the impeller, and the back vanes rotate synchronously with the impeller, effectively preventing leakage and improving the pump operation efficiency.
[0037] Existing large high-temperature submerged pumps all adopt the method of axial downward suction and radial discharge of the impeller. This makes the liquid level increase significantly when the pump starts and there are potential safety hazards of insufficient suction and cavitation during operation.
[0038] The solution of the present utility model is to design the impeller to be inverted and suck from the upper side. Compared with the existing axial downward suction design, the impeller of the present utility model is designed in a flooded state. And for the spiral double volute pump body of the present utility model, compared with the lateral discharge of the existing scheme, it adopts axial upward discharge, so that the pump body automatically forms a liquid accumulation tank mode, effectively reducing the pump start-up liquid level, improving the pump suction performance and reducing the risk of cavitation.
[0039] Existing high-temperature submerged pumps all adopt the gravity drainage method to discharge the internal medium. Although such a scheme is simple and can effectively achieve the drainage of the medium, during the pump disassembly process, there may be safety hazards such as splashing.
[0040] The solution of the present utility model is to design a drain valve at the bottom of the pump body. The drain valve is a specially designed check valve. When the pump is running, the check valve is closed. When drainage is required during maintenance, etc., the medium can be discharged orderly and at a fixed point through external tools. On the premise of ensuring that the internal medium of the pump is completely drained, the splashing of the medium is avoided, effectively reducing the safety risk.
[0041] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A low-level self-balancing high-temperature submerged pump, characterized in that: The pump body suction port of the low liquid level self-balancing high-temperature submerged pump is axially upward suction, and the discharge port is axially discharged after spiral rising eccentricity. The low liquid level self-balancing high-temperature submerged pump adopts a spiral double volute pump body. The center line of the pump body outlet is concentric with the drain pipe component, and the design centers of both coincide with the operating center line of the pump rotor component; The impeller in the low liquid level self-balancing high-temperature submerged pump is arranged upside down. The impeller includes a front cover plate and a rear cover plate. There are back blades on the rear cover plate of the impeller. The back blades rotate synchronously with the impeller. A drain valve is provided at the bottom of the pump body.
2. The low-level self-balancing high-temperature submerged pump according to claim 1, characterized in that: The impeller is fixed on the pump shaft by a locking nut. The key on the pump shaft cooperates with the impeller to transmit the torque of the prime mover to the rotor component. The impeller inlet is axially upward suction.
3. The low-level self-balancing high-temperature submerged pump according to claim 1, wherein: The drain pipe component includes a support protection pipe and a drain pipe, which jointly provide safe support for the operation of the pump.
4. The low-level self-balancing high-temperature submerged pump according to claim 1, wherein: The drain valve includes a valve core, a gasket, a spring, a valve seat and a valve cover; the gasket is installed on the valve core, the spring is installed on the valve seat, the valve core and the valve seat are connected by threads, and the valve cover and the pump cover are connected by threads; the gasket is installed in cooperation with the pump cover.
5. The low-level self-balancing high-temperature submerged pump according to claim 1, wherein: The pump body is connected to the drain pipe component by a flange and bolts.