Heat insulation cooling structure of high-temperature magnetic drive pump

Abstract

The heat insulation and cooling structure comprises a pump pipe and a motor located above the pump pipe, a pump shaft is arranged 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, the lower portion of the motor support extends into the pump pipe, and an air cooling cavity is formed in the motor support. The motor is fixed to the top of the motor support, a motor shaft extends into the air cooling cavity, the motor shaft is connected with an outer magnetic sleeve in the air cooling cavity, the pump shaft is connected with an inner magnetic sleeve in the outer magnetic sleeve, an isolation hood used for containing the inner magnetic sleeve is arranged between the outer magnetic sleeve and the inner magnetic sleeve, and an air guide pipe is arranged between the outer magnetic sleeve and the air cooling cavity. The upper end of the air guide pipe is fixedly sealed on the side wall of the air cooling cavity, a cooling fan is further installed on the motor shaft located in the air cooling cavity, an air outlet and an air inlet are formed in the positions, corresponding to the upper portion and the lower portion of the air guide pipe, of the motor support respectively, and when the motor shaft rotates, the cooling fan can be driven to suck air from the air inlet. And the air is discharged from the air outlet after heat exchange.

Description

Technical Field

[0001] The 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, film and television printing and other departments to pump flammable, explosive, toxic and precious liquids. Magnetic pumps are often installed on the top cover of a pool container or in a closed pipeline. The motor and pump use a magnetic coupling to transmit torque. The motor is arranged on the atmospheric side. The pump cavity is in a high-temperature environment. The magnetic coupling will have vortex heating. When the temperature of the magnetic coupling 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 the motor temperature to be too high, thereby reducing the service life of the motor. Summary of the invention

[0003] In view of the above-mentioned deficiencies of 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 influence 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: 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 downward into the air-cooling cavity along the center line of the pump pipe, and the air-cooling cavity is provided An air duct coaxial with the pump pipe, the upper end of the air duct is spaced from the top of the air cooling chamber, the upper end of the air duct is bent outward and fixedly sealed and connected to the wall of the cooling chamber, the air duct and the wall of the 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 end 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 end of the air duct and the motor support; An outer magnetic sleeve which is coaxial with the pump pipe and an inner magnetic sleeve which is located inside the outer magnetic sleeve are respectively arranged in the air duct and below the motor shaft, an isolation cover is arranged between the outer magnetic sleeve and the inner magnetic sleeve, the isolation cover is respectively arranged with a spacing between the outer magnetic sleeve and the inner magnetic sleeve, the outer magnetic sleeve is arranged with a spacing between the air duct, the lower ends of the outer magnetic sleeve and the inner magnetic sleeve are respectively arranged with a spacing between the cavity bottom of the air cooling cavity, the lower open end of the isolation cover is fixedly and sealedly connected to the cavity bottom of the air cooling cavity to seal the inner magnetic sleeve inside it, a connecting part is arranged at the upper end of the outer magnetic sleeve and is transmission-connected to the motor shaft located in the air cooling cavity through the connecting part, a cooling air duct extending up and down is formed between the outer magnetic sleeve and the air duct and the isolation cover, the lower end of the cooling air duct is connected to the lower end of the air inlet duct, a cooling fan is arranged on the motor shaft located in the air cooling cavity, and when the motor shaft drives the cooling fan to rotate, the cooling fan can inhale air through the air inlet and exhaust 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 are rotatably sealed. A fixing part is provided inside the inner magnetic sleeve and is transmission-connected to the pump shaft inside the inner magnetic sleeve through the fixing part.

[0005] 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, the inner magnetic sleeve is driven to rotate by magnetic force, and then the pump shaft connected to the inner magnetic sleeve is driven to rotate. When the cooling fan rotates, negative pressure is generated, so that air enters the cooling chamber from the air inlet; the air entering from the air inlet first enters the air inlet duct and flows downward, and 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, and the air flows from bottom to top, and finally is discharged through the air outlet after passing through the cooling fan. The air will exchange heat in the air inlet duct and the cooling duct, taking away the heat inside the magnetic coupling, which 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.

[0006] 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 direction 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.

[0007] As an optimization, the fixing portion includes a fixing block with the inner magnetic sleeve protrusion formed inside it, and a fixing hole is penetrated through 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.

[0008] As an optimization, 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. After the heat exchanged air comes out of the air outlet, it can flow upward under the guidance of the air guide cover to prevent the hot air after heat exchange from being sucked into the air inlet again.

[0009] As an optimization, 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 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 through the sealing ring.

[0010] 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.

[0011] Compared with the prior art, the present invention uses an air path design to allow cooling air to circulate well without dead space, thereby 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

[0012] Figure 1 It is a cross-sectional view of the internal structure of the present invention. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme 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 here 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 claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0014] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] 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 in 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 is in the air-cooling chamber, and an air duct 5 coaxial with the pump pipe 1 is arranged 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 outwardly and fixedly sealed and connected to the cavity wall of the cooling chamber, the air duct 5 and the cavity wall of the cooling chamber are spaced apart and an air inlet duct extending up and down is formed between them, a plurality of air inlets connected to the air inlet duct are provided on the motor support 4 and at positions corresponding to the upper end of the air inlet duct, and a plurality of air outlets connected to the air-cooling chamber are provided on the motor support 4 and above the position corresponding to the connection between the upper end of the air duct 5 and the motor support 4; 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 are respectively arranged in the air duct 5 and below the motor shaft, an isolation cover 8 is arranged between the outer magnetic sleeve 6 and the inner magnetic sleeve 7, the isolation cover 8 is respectively arranged with a spacing between the outer magnetic sleeve 6 and the inner magnetic sleeve 7, the outer magnetic sleeve 6 is arranged with a spacing between the air duct 5, the lower ends of the outer magnetic sleeve 6 and the inner magnetic sleeve 7 are respectively arranged with a spacing between the cavity bottom of the air cooling cavity, the lower open end of the isolation cover 8 is fixedly and sealedly connected to the cavity bottom of the air cooling cavity to seal the inner magnetic sleeve 7 inside it, a connecting portion is arranged at the upper end of the outer magnetic sleeve 6 and is transmission-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, the lower end of the cooling air duct is connected to the lower end of the air inlet duct, a cooling fan 9 is mounted on the motor shaft located in the air cooling cavity, and 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; 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 with each other. 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.

[0016] 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.

[0017] In this specific embodiment, the fixing portion includes a fixing block protruding from the inner magnetic sleeve 7 and formed inside the fixing block. A fixing hole is formed on the fixing block along the center line direction of the pump shaft 3 and the fixing hole is sleeved on the upper end of the pump shaft 3.

[0018] 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.

[0019] 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, the bottom of the annular folded edge is concavely provided 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 through the sealing ring.

[0020] In this specific implementation manner, the plurality of air inlets and the plurality of air outlets are evenly spaced around the center line of the air cooling chamber.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. 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 may 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 insulation cooling structure for a high temperature magnetic pump, comprising a vertically arranged pump pipe and a motor located above the pump pipe, wherein a pump shaft is arranged in the pump pipe on the same center line, and characterized in that: A motor support is provided 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 chamber extending along the center line of the pump pipe 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 downward into the air cooling chamber along the center line of the pump pipe, an air guide duct coaxial with the pump pipe is provided in the air cooling chamber, the upper end of the air guide duct is spaced apart from the cavity top of the air cooling chamber, the upper end of the air guide duct is bent outwardly and fixedly sealed and connected to the cavity wall of the cooling chamber, the air guide duct and the cavity wall of the cooling chamber are spaced apart and an air inlet duct extending up and down is formed between each other, a plurality of air inlets connected to the air inlet duct are provided on the motor support and at positions corresponding to the upper ends of the air inlet ducts, and a plurality of air outlets connected to the air cooling chamber are provided on the motor support and above the positions corresponding to the connection positions of the upper ends of the air guide ducts and the motor support; An outer magnetic sleeve which is coaxial with the pump pipe and an inner magnetic sleeve which is located inside the outer magnetic sleeve are respectively arranged in the air duct and below the motor shaft, an isolation cover is arranged between the outer magnetic sleeve and the inner magnetic sleeve, the isolation cover is respectively arranged with a spacing between the outer magnetic sleeve and the inner magnetic sleeve, the outer magnetic sleeve is arranged with a spacing between the air duct, the lower ends of the outer magnetic sleeve and the inner magnetic sleeve are respectively arranged with a spacing between the cavity bottom of the air cooling cavity, the lower open end of the isolation cover is fixedly and sealedly connected to the cavity bottom of the air cooling cavity to seal the inner magnetic sleeve inside it, a connecting part is arranged at the upper end of the outer magnetic sleeve and is transmission-connected to the motor shaft located in the air cooling cavity through the connecting part, a cooling air duct extending up and down is formed between the outer magnetic sleeve and the air duct and the isolation cover, the lower end of the cooling air duct is connected to the lower end of the air inlet duct, a cooling fan is arranged on the motor shaft located in the air cooling cavity, and when the motor shaft drives the cooling fan to rotate, the cooling fan can inhale air through the air inlet and exhaust 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 are rotatably sealed. A fixing part is provided inside the inner magnetic sleeve and is transmission-connected to the pump shaft inside the inner magnetic sleeve through the fixing part.

2. The heat insulation cooling structure of the high temperature magnetic pump according to claim 1 is characterized in that: 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.

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

4. The heat insulation cooling structure of the high temperature magnetic pump according to claim 1 is characterized in that: The outer side of the motor support is provided with an air guide cover, 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 insulation cooling structure of the high temperature magnetic pump according to claim 1 is 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 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 through the sealing ring.

6. The heat insulation cooling structure of the high temperature magnetic pump according to claim 1 is 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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