Thermal insulation cooling structure of high temperature magnetic pump

Abstract

The motor is fixed on the top of the motor support and the motor shaft extends into the air-cooling cavity. The motor is fixed on the top of the motor support and the motor shaft extends into the air-cooling cavity. The motor shaft is connected to the outer magnetic sleeve in the air-cooling cavity, and the pump shaft is connected to the inner magnetic sleeve in the outer magnetic sleeve. An isolation cover for accommodating the inner magnetic sleeve therein is provided between the outer magnetic sleeve and the inner magnetic sleeve, and an air guide duct is provided between the outer magnetic sleeve and the air-cooling cavity. The upper end of the air guide duct is fixedly sealed on the side wall of the air-cooling cavity, and a cooling fan is also installed on the motor shaft located in the air-cooling cavity. An air outlet and an air inlet are respectively provided at positions above and below the motor support corresponding to the air guide duct. When the motor shaft rotates, it can drive the cooling fan to suck air from the air inlet and discharge it from the air outlet after heat exchange.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic pumps, and in particular to a heat-insulating cooling structure of a high-temperature magnetic pump. Background Art

[0002] Magnetic pumps are completely sealed, leak-free, and corrosion-resistant. They are widely used in the petroleum, chemical, pharmaceutical, electroplating, environmental protection, water treatment, and film and television printing sectors to pump flammable, explosive, toxic, and precious liquids. Magnetic pumps are often installed on the top cover of a tank container or in a closed pipeline. The motor and pump use a magnetic coupling to transmit torque. The motor is located on the atmospheric side, and the high temperature environment in the pump cavity causes vortex heating in the magnetic coupling. When the magnetic coupling temperature is too high, it will cause the magnetic material to demagnetize, which will not only affect the conveying capacity, but also transfer heat to the motor, causing it to overheat and reduce its service life. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a heat-insulating cooling structure for a high-temperature magnetic pump that can reduce the operating temperature of the magnetic coupling and reduce the impact of heat conduction on the service life of the motor.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A heat-insulating cooling structure for a high-temperature magnetic pump comprises a vertically arranged pump pipe and a motor located above the pump pipe, a pump shaft is arranged in the same center line in the pump pipe, a motor support is arranged between the pump pipe and the motor, the motor support is fixedly connected to the top of the pump pipe and the lower part of the motor support extends into the pump pipe, an air-cooling cavity extending along the center line of the pump pipe is arranged inside the motor support, the motor is fixedly connected to the top of the motor support, the bottom of the motor has a motor shaft extending downwardly into the air-cooling cavity along the center line of the pump pipe, and the air-cooling cavity is provided with An air duct coaxial with the pump pipe, an upper end of the air duct is spaced apart from the cavity top of the air cooling chamber, the upper end of the air duct is bent outward and fixedly and sealedly connected to the cavity wall of the air cooling chamber, the air duct and the cavity wall of the air cooling chamber are spaced apart and an air intake duct extending up and down is formed between them, a plurality of air inlets connected to the air intake duct are provided on the motor support at positions corresponding to the upper ends of the air intake duct, and a plurality of air outlets connected to the air cooling chamber are provided on the motor support at positions corresponding to the connection positions between the upper ends of the air duct and the motor support;

[0006] The air duct is provided with an outer magnetic sleeve which is coaxial with the pump pipe and an inner magnetic sleeve which is located inside the outer magnetic sleeve, and an isolation cover is provided between the outer magnetic sleeve and the inner magnetic sleeve, and the isolation cover is respectively spaced apart from the outer magnetic sleeve and the inner magnetic sleeve, and the outer magnetic sleeve and the air duct are spaced apart, and the lower ends of the outer magnetic sleeve and the inner magnetic sleeve are respectively spaced apart from the cavity bottom of the air cooling chamber, and the lower open end of the isolation cover is fixedly sealed and connected to the cavity bottom of the air cooling chamber to seal the inner magnetic sleeve therein, and the upper end of the outer magnetic sleeve is provided with a connecting portion and is transmission-connected to the motor shaft located in the air cooling chamber through the connecting portion, and a cooling air duct extending up and down is formed between the outer magnetic sleeve and the air duct and the isolation cover respectively, and the lower end of the cooling air duct is connected to the lower end of the intake air duct, and a cooling fan is provided on the motor shaft located in the air cooling chamber. When the motor shaft drives the cooling fan to rotate, the cooling fan can inhale air through the air inlet and discharge air through the air outlet;

[0007] The upper end of the pump shaft passes through the bottom of the motor support and extends into the interior of the inner magnetic sleeve. The pump shaft and the motor support rotate and seal together. A fixing part is provided inside the inner magnetic sleeve and is connected to the pump shaft inside the inner magnetic sleeve through the fixing part.

[0008] In the present invention, the motor shaft drives the outer magnetic sleeve and the cooling fan to rotate at the same time. When the outer magnetic sleeve rotates, it drives the inner magnetic sleeve to rotate through magnetic force, and then drives the pump shaft connected to the inner magnetic sleeve to rotate. When the cooling fan rotates, negative pressure is generated, causing air to enter the air cooling chamber from the air inlet. When the air enters the air inlet, it first enters the air inlet duct and flows downward. At the lower end of the air inlet duct, the air can simultaneously enter the cooling duct between the outer magnetic sleeve and the air guide pipe and the outer magnetic sleeve and the isolation cover. The air flows from bottom to top and is finally discharged through the air outlet after passing through the cooling fan. The air exchanges heat in both the air inlet duct and the cooling duct, taking away the heat inside the magnetic coupling. This not only reduces the temperature of the magnetic coupling and avoids the occurrence of demagnetization, but also blocks the heat from being transferred upward to the motor, thereby increasing the service life of the motor.

[0009] As an optimization, the connecting part includes a connecting sleeve mounted on the motor shaft, and a plurality of connecting claws evenly spaced around the center line of the motor shaft are arranged between the connecting sleeve and the outer magnetic sleeve. The connecting claws are respectively integrally formed with the connecting sleeve and the outer magnetic sleeve. The cooling fan includes a hub mounted on the connecting sleeve and fan blades installed on the hub.

[0010] As an optimization, the fixing portion includes a fixing block with the inner magnetic sleeve protrusion formed therein, and a fixing hole is penetrated on the fixing block along the center line direction of the pump shaft and is sleeved on the upper end of the pump shaft through the fixing hole.

[0011] As an optimization, an air guide cover is provided on the outside of the motor support. One end of the air guide cover is closed and fixedly and sealedly connected to the motor support between the air outlet and the air inlet. The other end of the air guide cover is open and is positioned upward from the motor support. After the heat exchanged air exits the air outlet, it can flow upward under the guidance of the air guide cover, preventing the hot air from being drawn back into the air inlet.

[0012] As an optimization, the lower open end of the isolation cover is bent horizontally outward to form an annular folded edge, the bottom of the annular folded edge abuts against the bottom of the air-cooling chamber, the bottom of the annular folded edge is recessed with a sealing groove which is coaxial with the annular folded edge, a sealing ring is embedded in the sealing groove, and a plurality of fastening bolts are evenly spaced around the center line of the annular folded edge. The fastening bolts pass through the annular folded edge and are threadedly connected to the bottom of the air-cooling chamber, so that the annular folded edge is fixed to the bottom of the air-cooling chamber and the annular folded edge and the bottom of the air-cooling chamber are sealed by the sealing ring.

[0013] As an optimization, the plurality of air inlets and the plurality of air outlets are evenly spaced around the center line of the air cooling chamber, so that air can pass through evenly in the circumferential direction and heat exchange can occur, thereby improving the overall heat dissipation effect.

[0014] Compared with the existing technology, the present invention uses an air path design to ensure that the cooling air can circulate well without dead space, effectively reducing the temperature of the outer magnetic sleeve and the isolation cover. At the same time, it can also effectively control the temperature of the inner magnetic sleeve to prevent the magnetic material of the magnetic coupling from being demagnetized and failing due to excessive temperature. In addition, due to the circulation of cooling air, the isolated heat is transferred upward, which reduces the operating temperature of the motor and increases the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the internal structure of the present invention. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the figures, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and are not to be construed as indicating or implying relative importance. Furthermore, terms such as "horizontal" and "vertical" do not imply that a component must be absolutely horizontal or overhanging, but rather may be slightly tilted. For example, "horizontal" simply refers to a direction that is more horizontal than "vertical," and does not imply that the structure must be completely horizontal, but rather may be slightly tilted. In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0018] like Figure 1 As shown, the direction of the arrow in the accompanying drawings is the direction of air flow. The heat-insulating cooling structure of the high-temperature magnetic pump in this specific embodiment includes a vertically arranged pump pipe 1 and a motor 2 located above the pump pipe 1. A pump shaft 3 is arranged on the same center line in the pump pipe 1. A motor support 4 is arranged between the pump pipe 1 and the motor 2. The motor support 4 is fixedly connected to the top of the pump pipe 1 and the lower part of the motor support 4 extends into the pump pipe 1. The interior of the motor support 4 is provided with an air-cooling cavity extending along the center line of the pump pipe 1. The motor 2 is fixedly connected to the top of the motor support 4, and the bottom of the motor 2 has a cooling chamber extending downward along the center line of the pump pipe 1. The motor shaft in the air-cooling chamber, an air duct 5 with the same center line as the pump pipe 1 is provided in the air-cooling chamber, the upper end of the air duct 5 is spaced apart from the cavity top of the air-cooling chamber, the upper end of the air duct 5 is bent outward and fixedly sealed and connected to the cavity wall of the air-cooling chamber, the air duct 5 and the cavity wall of the air-cooling chamber are spaced apart and an air intake duct extending up and down is formed between them, a plurality of air inlets connected to the air intake duct are provided on the motor support 4 and corresponding to the position of the upper end of the air intake duct, a plurality of air outlets connected to the air cooling chamber are provided on the motor support 4 and corresponding to the upper part of the connection position of the upper end of the air duct 5 and the motor support 4;

[0019] The air duct 5 is provided with an outer magnetic sleeve 6 which is coaxial with the pump pipe 1 and an inner magnetic sleeve 7 which is located inside the outer magnetic sleeve 6, and an isolation cover 8 is provided between the outer magnetic sleeve 6 and the inner magnetic sleeve 7. The isolation cover 8 is spaced apart from the outer magnetic sleeve 6 and the inner magnetic sleeve 7, respectively. The outer magnetic sleeve 6 and the air duct 5 are spaced apart from each other, and the lower ends of the outer magnetic sleeve 6 and the inner magnetic sleeve 7 are spaced apart from each other. The lower open end of the isolation cover 8 is fixedly sealed and connected to the bottom of the air cooling cavity to seal the inner magnetic sleeve 7 inside it. The upper end of the outer magnetic sleeve 6 is provided with a connecting portion and is connected to the motor shaft located in the air cooling cavity through the connecting portion. A cooling air duct extending up and down is formed between the outer magnetic sleeve 6 and the air duct 5 and the isolation cover 8, respectively. The lower end of the cooling air duct is connected to the lower end of the air inlet duct, and a cooling fan 9 is provided on the motor shaft located in the air cooling cavity. When the motor shaft drives the cooling fan 9 to rotate, the cooling fan 9 can inhale air through the air inlet and discharge air through the air outlet;

[0020] The upper end of the pump shaft 3 passes through the bottom of the motor support 4 and extends into the interior of the inner magnetic sleeve 7. The pump shaft 3 and the motor support 4 rotate and seal together. A fixed part is provided inside the inner magnetic sleeve 7 and is connected to the pump shaft 3 inside the inner magnetic sleeve 7 through the fixed part.

[0021] In this specific embodiment, the connecting part includes a connecting sleeve mounted on the motor shaft, and a plurality of connecting claws evenly spaced around the center line of the motor shaft are arranged between the connecting sleeve and the outer magnetic sleeve 6. The connecting claws are respectively integrally formed with the connecting sleeve and the outer magnetic sleeve 6. The cooling fan 9 includes a hub mounted on the connecting sleeve and fan blades installed on the hub.

[0022] In this specific embodiment, the fixing portion includes a fixing block protruding from the inner magnetic sleeve 7 , the fixing block is provided with a fixing hole along the center line of the pump shaft 3 and is sleeved on the upper end of the pump shaft 3 through the fixing hole.

[0023] In this specific embodiment, an air guide cover 10 is provided on the outer side of the motor support 4, one end of the air guide cover 10 is a closed end and is fixedly and sealedly connected to the position of the motor support 4 between the air outlet and the air inlet, and the other end of the air guide cover 10 is an open end and is arranged toward the top of the motor support 4.

[0024] In this specific embodiment, the lower open end of the isolation cover 8 is horizontally bent outward to form an annular folded edge, the bottom of the annular folded edge abuts against the bottom of the air-cooling chamber, and the bottom of the annular folded edge is recessed with a sealing groove coaxial with the annular folded edge, a sealing ring is embedded in the sealing groove, and a plurality of fastening bolts are evenly spaced around the center line of the annular folded edge. The fastening bolts pass through the annular folded edge and are threadedly connected to the bottom of the air-cooling chamber, so that the annular folded edge is fixed to the bottom of the air-cooling chamber and the annular folded edge and the bottom of the air-cooling chamber are sealed by the sealing ring.

[0025] In this specific embodiment, the plurality of air inlets and the plurality of air outlets are evenly spaced around the center line of the air cooling chamber.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described with reference to the preferred embodiments of the present invention, it should be understood by those skilled in the art that various changes can be made in form and details without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A heat-insulating cooling structure for a high-temperature magnetic pump, comprising a vertically arranged pump tube and a motor located above the pump tube, wherein a pump shaft is arranged coaxially within the pump tube, and characterized in that: The motor is fixedly connected to the top of the pump tube and the lower part of the motor support extends into the pump tube. An air cooling chamber extending along the center line of the pump tube is provided inside the motor support. The motor is fixedly connected to the top of the motor support. The bottom of the motor has a motor shaft extending downwardly into the air cooling chamber along the center line of the pump tube. An air duct coaxial with the pump tube is provided in the air cooling chamber. The upper end of the air duct is spaced apart from the cavity top of the air cooling chamber and the upper end of the air duct is bent outward and fixedly sealed and connected to the cavity wall of the air cooling chamber. The air duct and the cavity wall of the air cooling chamber are spaced apart and form an air intake duct extending upward and downward. A plurality of air inlets connected to the air intake duct are provided on the motor support and corresponding to the position at the upper end of the air intake duct, and a plurality of air outlets connected to the air cooling chamber are provided on the motor support and corresponding to the connection position of the upper end of the air duct and the motor support; The air duct is provided with an outer magnetic sleeve which is coaxial with the pump pipe and an inner magnetic sleeve which is located inside the outer magnetic sleeve, and an isolation cover is provided between the outer magnetic sleeve and the inner magnetic sleeve, and the isolation cover is respectively spaced apart from the outer magnetic sleeve and the inner magnetic sleeve, and the outer magnetic sleeve and the air duct are spaced apart, and the lower ends of the outer magnetic sleeve and the inner magnetic sleeve are respectively spaced apart from the cavity bottom of the air cooling chamber, and the lower open end of the isolation cover is fixedly sealed and connected to the cavity bottom of the air cooling chamber to seal the inner magnetic sleeve therein, and the upper end of the outer magnetic sleeve is provided with a connecting portion and is transmission-connected to the motor shaft located in the air cooling chamber through the connecting portion, and a cooling air duct extending up and down is formed between the outer magnetic sleeve and the air duct and the isolation cover respectively, and the lower end of the cooling air duct is connected to the lower end of the intake air duct, and a cooling fan is provided on the motor shaft located in the air cooling chamber. When the motor shaft drives the cooling fan to rotate, the cooling fan can inhale air through the air inlet and discharge air through the air outlet; The upper end of the pump shaft passes through the bottom of the motor support and extends into the interior of the inner magnetic sleeve. The pump shaft and the motor support rotate and seal together. A fixing part is provided inside the inner magnetic sleeve and is connected to the pump shaft inside the inner magnetic sleeve through the fixing part.

2. The heat-insulating cooling structure of the high-temperature magnetic pump according to claim 1, characterized in that: The connecting part includes a connecting sleeve sleeved on the motor shaft, and a plurality of connecting claws evenly spaced around the center line of the motor shaft are arranged between the connecting sleeve and the outer magnetic sleeve. The connecting claws are respectively integrally formed with the connecting sleeve and the outer magnetic sleeve. The cooling fan includes a hub sleeved on the connecting sleeve and fan blades installed on the hub.

3. The heat-insulating cooling structure of the high-temperature magnetic pump according to claim 1, characterized in that: The fixing portion includes a fixing block with a protrusion formed inside the inner magnetic sleeve. A fixing hole is formed on the fixing block along the center line direction of the pump shaft and is sleeved on the upper end of the pump shaft through the fixing hole.

4. The heat-insulating cooling structure of a high-temperature magnetic pump according to claim 1, characterized in that: An air guide cover is provided on the outer side of the motor support, one end of the air guide cover is a closed end and is fixedly and sealedly connected to the position of the motor support between the air outlet and the air inlet, and the other end of the air guide cover is an open end and is arranged toward the top of the motor support.

5. The heat-insulating cooling structure of a high-temperature magnetic pump according to claim 1, characterized in that: The lower open end of the isolation cover is horizontally bent outward to form an annular folded edge, the bottom of the annular folded edge abuts against the bottom of the air-cooling chamber, the bottom of the annular folded edge is concavely provided with a sealing groove which is coaxial with the annular folded edge, a sealing ring is embedded in the sealing groove, and a plurality of fastening bolts are evenly spaced around the center line of the annular folded edge. The fastening bolts pass through the annular folded edge and are threadedly connected to the bottom of the air-cooling chamber, so that the annular folded edge is fixed to the bottom of the air-cooling chamber and the annular folded edge and the bottom of the air-cooling chamber are sealed by the sealing ring.

6. The heat-insulating cooling structure of a high-temperature magnetic pump according to claim 1, characterized in that: The plurality of air inlets and the plurality of air outlets are evenly spaced around the center line of the air cooling chamber.

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