Electromagnetic pump pumping channel heat insulation structure

Abstract

The utility model provides a kind of electromagnetic pump pump ditch heat insulation structure, including pump ditch outer wall, pump ditch outer wall is equipped with the pump ditch internal component of pump ditch outer wall coaxial arrangement, the both ends of pump ditch internal component are fixed by support block;Pump ditch outer wall outside is provided with outer sleeve tube, vacuum interlayer is equipped between pump ditch outer wall and outer sleeve tube.Pump ditch internal component and the gap of pump ditch outer wall constitute annular flow channel of high-temperature liquid metal flow.The coil of electromagnetic pump is located outside outer sleeve tube, and the annular flow channel of high-temperature liquid metal flow is heat-insulated by vacuum interlayer between coil.The vacuum interlayer structure is used, compared with conventional heat insulation material, with lower thermal conductivity, better heat insulation effect, reduce the heat transfer of high-temperature liquid metal in pump ditch to outside coil, reduce the coil operating temperature, improve the operation reliability of electromagnetic pump.

Description

Technical Field

[0001] This utility model belongs to the field of fluid machinery, and in particular relates to a heat insulation structure for the pump groove of an electromagnetic pump. Background Technology

[0002] When a three-phase cylindrical induction electromagnetic pump is running, the magnetic field generated by the three-phase winding coils interacts with the induced electromagnetic field on the liquid metal, generating an axial thrust that propels the medium to flow. The medium flowing through the pump channel is high-temperature liquid metal, and a large amount of heat is transferred to the coils through conduction and convection. To ensure that the coil operating temperature is below the heat resistance temperature while maintaining the overall efficiency of the electromagnetic pump, a very thin layer of heat-insulating material is often installed on the outer wall of the pump channel.

[0003] Existing patent CN117526599A discloses a high-temperature resistant electromagnetic pump core, comprising an axial iron core, a radial iron core, and a coil. The coil is located between the radial iron cores and includes several layers of coaxially nested cylindrical sub-coils with gaps between each layer. The cylindrical sub-coils are made of aluminum wire wound with a ceramic coating formed by TECO oxidation. This invention provides a high-temperature resistant electromagnetic pump core where the coil is coaxially nested with cylindrical sub-coils wound from a single flat aluminum wire. The flat aluminum wire has a TECO ceramic coating, which can withstand temperatures up to 350℃, significantly reducing the electromagnetic pump's reliance on high-performance heat-insulating ceramic materials. Each layer of cylindrical sub-coils, as well as the sub-coils themselves, is separated from the radial and axial iron cores by insulating ceramic sleeves. The entire insulation system is made of inorganic insulating materials. The pump core has multiple axially penetrating holes, greatly enhancing the coil's heat dissipation and further improving its tolerance to high-temperature environments. Utility Model Content

[0004] With long-term operation of electromagnetic pumps, the insulation material will be affected by environmental factors such as humidity and corrosion, leading to a decline in insulation performance, increased winding coil temperature, and reduced lifespan of the electromagnetic pump. To address the operational reliability and lifespan of electromagnetic pumps in humid and salt spray environments, a more reliable pump trench insulation structure needs to be designed.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: an electromagnetic pump trench heat insulation structure, including an outer wall of the trench, an internal component of the trench arranged coaxially in the outer wall of the trench, and the two ends of the internal component of the trench are fixed by support blocks; an outer sleeve is provided on the outer side of the outer wall of the trench, and a vacuum interlayer is provided between the outer wall of the trench and the outer sleeve.

[0006] Specifically, the gap between the internal components of the pump trench and the outer wall of the pump trench forms an annular flow channel for the flow of high-temperature liquid metal.

[0007] Specifically, the outer wall of the pump trench has a stepped structure, with thick walls at both ends and thin walls in the middle. The outer sleeve is located on the outside of the middle wall of the pump trench.

[0008] Specifically, the coil of the electromagnetic pump is located outside the outer tube, and the coil is insulated from the annular flow channel through a vacuum jacket.

[0009] Specifically, the outer wall of the pump trench and the outer sleeve are connected by welding, forming a vacuum interlayer between the outer wall of the pump trench and the outer sleeve by vacuum electron beam welding.

[0010] Specifically, a corrugated pipe is provided at one end of the outer casing, which absorbs the axial thermal deformation caused by the temperature difference between the outer wall of the pump trench and the outer casing.

[0011] Specifically, both the outer wall of the pump trench and the outer sleeve are made of non-magnetic austenitic stainless steel.

[0012] Specifically, the absolute pressure of the vacuum interlayer is below 100 Pa.

[0013] The beneficial effects of this invention are as follows: The vacuum jacket structure has a lower thermal conductivity than conventional insulation materials, resulting in better insulation. This reduces the heat transferred from the high-temperature liquid metal in the pump groove to the outer coil, lowering the coil operating temperature and improving the operational reliability of the electromagnetic pump. The vacuum jacket is constructed by welding the outer wall of the pump groove and the outer sleeve with stainless steel. Its insulation performance is unaffected by humid or salt spray environments, offering advantages such as excellent insulation and high reliability. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the present utility model.

[0015] Figure 2 This is a schematic diagram of the external structure of this utility model.

[0016] In the figure, 1 is the outer wall of the pump trench, 2 is the internal components of the pump trench, 3 is the annular flow channel, 4 is the vacuum jacket, 5 is the outer sleeve, 6 is the bellows, and 7 is the support block. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] Example 1: A heat insulation structure for the pump trench of an electromagnetic pump, such as Figure 1 As shown, it includes an outer wall 1 of a pump trench, an inner component 2 of the pump trench arranged coaxially within the outer wall 1, and the two ends of the inner component 2 of the pump trench are fixed by support blocks 7; an outer sleeve 5 is provided on the outside of the outer wall 1 of the pump trench, and a vacuum interlayer 4 is provided between the outer wall 1 of the pump trench and the outer sleeve 5.

[0019] The gap between the internal component 2 of the pump trench and the outer wall 1 of the pump trench forms an annular flow channel 3 for the flow of high-temperature liquid metal. The outer wall 1 of the pump trench has a stepped structure, with thick walls at both ends and thin walls in the middle. An outer sleeve 5 is installed on the outside of the outer wall 1 of the pump trench, and both ends are vacuum electron beam welded, so that the interlayer between the outer wall 1 of the pump trench and the outer sleeve 5 is in a vacuum state, with an absolute pressure below 100 Pa. The coil of the electromagnetic pump is located outside the outer sleeve 5, and the coil is insulated from the annular flow channel 3 for the flow of high-temperature liquid metal by a vacuum interlayer 4.

[0020] When the three-phase cylindrical induction electromagnetic pump is running, the magnetic field generated by the three-phase winding coil interacts with the induced electromagnetic field on the liquid metal, generating an axial thrust on the liquid metal and propelling the medium to flow. In this embodiment, the electromagnetic pump coil is located outside the outer sleeve 5, and is insulated from the high-temperature liquid metal inside the electromagnetic pump by a vacuum interlayer 4. The vacuum interlayer 4 reduces heat conduction and heat convection from the high-temperature liquid metal in the flow channel to the outside, and the heat insulation effect is not affected by humid or salt spray environments.

[0021] To reduce eddy current losses on the pump trench wall, both the outer casing and the outer sleeve 5 of the pump trench are made of non-magnetic austenitic stainless steel.

[0022] The vacuum jacket 4 has a lower thermal conductivity than the insulation material, which greatly reduces the heat conduction and convection of the high-temperature liquid metal in the flow channel, thus achieving a heat insulation effect. The vacuum jacket 4 is welded from the outer wall 1 of the pump groove and the outer sleeve 5, and is made of stainless steel, so the heat insulation effect is not affected by humid or salt spray environments.

[0023] The vacuum sandwich structure has a lower thermal conductivity than conventional insulation materials, resulting in better insulation. This reduces the heat transferred from the high-temperature liquid metal in the pump groove to the outer coil, lowers the coil operating temperature, and improves the operational reliability of the electromagnetic pump.

[0024] The vacuum jacket 4 is made of stainless steel pump trench outer wall 1 and outer sleeve 5 welded together. Its heat insulation effect is not affected by humid or salt spray environment, and it has the advantages of good heat insulation effect and high reliability.

[0025] Example 2: A heat insulation structure for an electromagnetic pump trench, including an outer wall 1 of the trench, an inner component 2 of the trench arranged coaxially within the outer wall 1, and both ends of the inner component 2 of the trench fixed by support blocks 7; an outer sleeve 5 is provided on the outside of the outer wall 1 of the trench, and a vacuum interlayer 4 is provided between the outer wall 1 of the trench and the outer sleeve 5.

[0026] The gap between the internal component 2 of the pump trench and the outer wall 1 of the pump trench forms an annular flow channel 3 for the flow of high-temperature liquid metal. The outer wall 1 of the pump trench has a stepped structure, with thick walls at both ends and thin walls in the middle. An outer sleeve 5 is installed on the outside of the outer wall 1 of the pump trench, and both ends are vacuum electron beam welded, so that the interlayer between the outer wall 1 of the pump trench and the outer sleeve 5 is in a vacuum state, with an absolute pressure below 100 Pa. The coil of the electromagnetic pump is located outside the outer sleeve 5, and the coil is insulated from the annular flow channel 3 for the flow of high-temperature liquid metal by a vacuum interlayer 4.

[0027] When the three-phase cylindrical induction electromagnetic pump is running, the magnetic field generated by the three-phase winding coil interacts with the induced electromagnetic field on the liquid metal, generating an axial thrust on the liquid metal and propelling the medium to flow. In this embodiment, the electromagnetic pump coil is located outside the outer sleeve 5, and is insulated from the high-temperature liquid metal inside the electromagnetic pump by a vacuum interlayer 4. The vacuum interlayer 4 reduces heat conduction and heat convection from the high-temperature liquid metal in the flow channel to the outside, and the heat insulation effect is not affected by humid or salt spray environments.

[0028] A corrugated pipe 6 is provided at one end of the outer sleeve 5 to absorb the axial thermal deformation caused by the temperature difference between the outer wall 1 of the pump trench and the outer sleeve 5, thereby reducing thermal stress and improving structural safety.

[0029] To reduce eddy current losses on the pump trench wall, both the outer casing and the outer sleeve 5 of the pump trench are made of non-magnetic austenitic stainless steel.

[0030] The vacuum jacket 4 has a lower thermal conductivity than the insulation material, which greatly reduces the heat conduction and convection of the high-temperature liquid metal in the flow channel, thus achieving a heat insulation effect. The vacuum jacket 4 is welded from the outer wall 1 of the pump groove and the outer sleeve 5, and is made of stainless steel, so the heat insulation effect is not affected by humid or salt spray environments.

[0031] The vacuum sandwich structure has a lower thermal conductivity than conventional insulation materials, resulting in better insulation. This reduces the heat transferred from the high-temperature liquid metal in the pump groove to the outer coil, lowers the coil operating temperature, and improves the operational reliability of the electromagnetic pump.

[0032] The vacuum jacket 4 is made of stainless steel pump trench outer wall 1 and outer sleeve 5 welded together. Its heat insulation effect is not affected by humid or salt spray environment, and it has the advantages of good heat insulation effect and high reliability.

[0033] Example 3: This example includes the outer wall of the pump trench 1, the outer sleeve 5, the internal components of the pump trench 2, and the support block 7.

[0034] The internal components 2 of the pump trench are arranged coaxially with the outer wall 1 of the pump trench, and are fixed at both ends by support blocks 7, forming an annular flow channel 3 for the flow of high-temperature liquid metal. An outer sleeve 5 is provided on the outer side of the outer wall 1 of the pump trench, and a vacuum interlayer 4 is provided between the outer wall 1 of the pump trench and the outer sleeve 5.

[0035] When the three-phase cylindrical induction electromagnetic pump is running, the magnetic field generated by the three-phase winding coil interacts with the induced electromagnetic field on the liquid metal, generating an axial thrust on the liquid metal and propelling the medium to flow. In this embodiment, the electromagnetic pump coil is located outside the outer sleeve 5, and is insulated from the high-temperature liquid metal inside the electromagnetic pump by a vacuum interlayer 4. The vacuum interlayer 4 reduces heat conduction and heat convection from the high-temperature liquid metal in the flow channel to the outside, and the heat insulation effect is not affected by humid or salt spray environments.

[0036] To reduce eddy current losses on the pump trench wall, both the outer casing and the outer sleeve 5 of the pump trench are made of non-magnetic austenitic stainless steel.

[0037] The outer wall 1 of the pump trench has a stepped structure, with thicker walls at both ends and thinner walls in the middle. An outer sleeve 5 is installed on the outside of the outer wall 1, with both ends vacuum electron beam welded, creating a vacuum between the outer wall 1 and the outer sleeve 5, achieving an absolute pressure below 100 Pa. The coil of the electromagnetic pump is located outside the outer sleeve 5, and the coil is insulated from the annular flow channel 3 through a vacuum interlayer 4. Compared to insulating materials, the vacuum interlayer 4 has a lower thermal conductivity, significantly reducing heat conduction and convection from the high-temperature liquid metal within the flow channel, thus achieving a heat insulation effect. The vacuum interlayer 4 is welded from the outer wall 1 and the outer sleeve 5, and is made of stainless steel; therefore, its insulation effect is unaffected by humid or salt spray environments.

[0038] The vacuum sandwich structure has a lower thermal conductivity than conventional insulation materials, resulting in better insulation. This reduces the heat transferred from the high-temperature liquid metal in the pump groove to the outer coil, lowers the coil operating temperature, and improves the operational reliability of the electromagnetic pump.

[0039] The vacuum jacket 4 is made of stainless steel pump trench outer wall 1 and outer sleeve 5 welded together. Its heat insulation effect is not affected by humid or salt spray environment, and it has the advantages of good heat insulation effect and high reliability.

[0040] Example 4: This example includes the outer wall of the pump trench 1, the outer sleeve 5, the internal components of the pump trench 2, and the support block 7.

[0041] The internal components 2 of the pump trench are arranged coaxially with the outer wall 1 of the pump trench, and are fixed at both ends by support blocks 7, forming an annular flow channel 3 for the flow of high-temperature liquid metal. An outer sleeve 5 is provided on the outer side of the outer wall 1 of the pump trench, and a vacuum interlayer 4 is provided between the outer wall 1 of the pump trench and the outer sleeve 5.

[0042] When the three-phase cylindrical induction electromagnetic pump is running, the magnetic field generated by the three-phase winding coil interacts with the induced electromagnetic field on the liquid metal, generating an axial thrust on the liquid metal and propelling the medium to flow. In this embodiment, the electromagnetic pump coil is located outside the outer sleeve 5, and is insulated from the high-temperature liquid metal inside the electromagnetic pump by a vacuum interlayer 4. The vacuum interlayer 4 reduces heat conduction and heat convection from the high-temperature liquid metal in the flow channel to the outside, and the heat insulation effect is not affected by humid or salt spray environments.

[0043] A corrugated pipe 6 is provided at one end of the outer sleeve 5 to absorb the axial thermal deformation caused by the temperature difference between the outer wall 1 of the pump trench and the outer sleeve 5, thereby reducing thermal stress and improving structural safety.

[0044] To reduce eddy current losses on the pump trench wall, both the outer casing and the outer sleeve 5 of the pump trench are made of non-magnetic austenitic stainless steel.

[0045] The outer wall 1 of the pump trench has a stepped structure, with thicker walls at both ends and thinner walls in the middle. An outer sleeve 5 is installed on the outside of the outer wall 1, with both ends vacuum electron beam welded, creating a vacuum between the outer wall 1 and the outer sleeve 5, achieving an absolute pressure below 100 Pa. The coil of the electromagnetic pump is located outside the outer sleeve 5, and the coil is insulated from the annular flow channel 3 through a vacuum interlayer 4. Compared to insulating materials, the vacuum interlayer 4 has a lower thermal conductivity, significantly reducing heat conduction and convection from the high-temperature liquid metal within the flow channel, thus achieving a heat insulation effect. The vacuum interlayer 4 is welded from the outer wall 1 and the outer sleeve 5, and is made of stainless steel; therefore, its insulation effect is unaffected by humid or salt spray environments.

[0046] The vacuum sandwich structure has a lower thermal conductivity than conventional insulation materials, resulting in better insulation. This reduces the heat transferred from the high-temperature liquid metal in the pump groove to the outer coil, lowers the coil operating temperature, and improves the operational reliability of the electromagnetic pump.

[0047] The vacuum jacket 4 is made of stainless steel pump trench outer wall 1 and outer sleeve 5 welded together. Its heat insulation effect is not affected by humid or salt spray environment, and it has the advantages of good heat insulation effect and high reliability.

[0048] Example 5: A heat insulation structure for an electromagnetic pump trench, including an outer wall 1 of the trench, an inner component 2 of the trench arranged coaxially within the outer wall 1, and both ends of the inner component 2 of the trench fixed by support blocks 7; an outer sleeve 5 is provided on the outside of the outer wall 1 of the trench, and a vacuum interlayer 4 is provided between the outer wall 1 of the trench and the outer sleeve 5.

[0049] The internal components 2 of the pump trench are arranged coaxially with the outer wall 1 of the pump trench, and are fixed at both ends by support blocks 7, forming an annular flow channel 3 for the flow of high-temperature liquid metal. An outer sleeve 5 is provided on the outer side of the outer wall 1 of the pump trench, and a vacuum interlayer 4 is provided between the outer wall 1 of the pump trench and the outer sleeve 5.

[0050] When the three-phase cylindrical induction electromagnetic pump is running, the magnetic field generated by the three-phase winding coil interacts with the induced electromagnetic field on the liquid metal, generating an axial thrust on the liquid metal and propelling the medium to flow. In this embodiment, the electromagnetic pump coil is located outside the outer sleeve 5, and is insulated from the high-temperature liquid metal inside the electromagnetic pump by a vacuum interlayer 4. The vacuum interlayer 4 reduces heat conduction and heat convection from the high-temperature liquid metal in the flow channel to the outside, and the heat insulation effect is not affected by humid or salt spray environments.

[0051] A corrugated pipe 6 is provided at one end of the outer sleeve 5 to absorb the axial thermal deformation caused by the temperature difference between the outer wall 1 of the pump trench and the outer sleeve 5, thereby reducing thermal stress and improving structural safety.

[0052] To reduce eddy current losses on the pump trench wall, both the outer casing and the outer sleeve 5 of the pump trench are made of non-magnetic austenitic stainless steel.

[0053] The outer wall 1 of the pump trench has a stepped structure, with thicker walls at both ends and thinner walls in the middle. An outer sleeve 5 is installed on the outside of the outer wall 1, with both ends vacuum electron beam welded, creating a vacuum between the outer wall 1 and the outer sleeve 5, achieving an absolute pressure below 100 Pa. The coil of the electromagnetic pump is located outside the outer sleeve 5, and the coil is insulated from the annular flow channel 3 through a vacuum interlayer 4. Compared to insulating materials, the vacuum interlayer 4 has a lower thermal conductivity, significantly reducing heat conduction and convection from the high-temperature liquid metal within the flow channel, thus achieving a heat insulation effect. The vacuum interlayer 4 is welded from the outer wall 1 and the outer sleeve 5, and is made of stainless steel; therefore, its insulation effect is unaffected by humid or salt spray environments.

[0054] The vacuum sandwich structure has a lower thermal conductivity than conventional insulation materials, resulting in better insulation. This reduces the heat transferred from the high-temperature liquid metal in the pump groove to the outer coil, lowers the coil operating temperature, and improves the operational reliability of the electromagnetic pump.

[0055] The vacuum jacket 4 is made of stainless steel pump trench outer wall 1 and outer sleeve 5 welded together. Its heat insulation effect is not affected by humid or salt spray environment, and it has the advantages of good heat insulation effect and high reliability.

Claims

1. A heat insulation structure for the pump trench of an electromagnetic pump, characterized in that, It includes the outer wall of the pump trench, and the inner components of the pump trench are arranged coaxially within the outer wall of the pump trench. The two ends of the inner components of the pump trench are fixed by support blocks. An outer sleeve is provided on the outside of the outer wall of the pump trench, and a vacuum interlayer is provided between the outer wall of the pump trench and the outer sleeve.

2. The electromagnetic pump trench heat insulation structure according to claim 1, characterized in that, The gap between the internal components of the pump trench and the outer wall of the pump trench forms an annular flow channel for the flow of high-temperature liquid metal.

3. The electromagnetic pump trench heat insulation structure according to claim 1, characterized in that, The outer wall of the pump trench has a stepped structure, with thick walls at both ends and thin walls in the middle. The outer sleeve is located on the outside of the middle wall of the pump trench.

4. The electromagnetic pump trench heat insulation structure according to claim 1 or 3, characterized in that, The coil of the electromagnetic pump is located outside the outer tube, and the coil is insulated from the annular flow channel through a vacuum jacket.

5. The electromagnetic pump trench heat insulation structure according to claim 1 or 3, characterized in that, The outer wall of the pump trench and the outer sleeve are connected by welding, forming a vacuum interlayer between the outer wall of the pump trench and the outer sleeve by vacuum electron beam welding.

6. The electromagnetic pump trench heat insulation structure according to claim 1, characterized in that, A corrugated pipe is provided at one end of the outer casing, which absorbs the axial thermal deformation caused by the temperature difference between the outer wall of the pump trench and the outer casing.

7. The electromagnetic pump trench heat insulation structure according to claim 1, characterized in that, The outer wall of the pump trench and the outer sleeve are both made of non-magnetic austenitic stainless steel.

8. The electromagnetic pump trench heat insulation structure according to claim 5, characterized in that, The absolute pressure of the vacuum jacket is below 100 Pa.

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