Heat preservation magnetic drive pump

Abstract

The utility model relates to a heat preservation magnetic drive pump which comprises a pump body and a heat preservation middle body, a pump cavity is defined by the pump body and the heat preservation middle body, the heat preservation middle body comprises an inner wall, an outer wall, a first annular plate and a second annular plate, and a circulating pipe penetrating through the first annular plate and the second annular plate is arranged between the inner wall and the outer wall. An isolation cavity is defined by the isolation sleeve assembly and the side, away from the pump body, of the heat preservation middle body, and the isolation sleeve assembly comprises an inner isolation sleeve and an outer isolation sleeve from inside to outside in sequence; the pump shaft penetrates through the pump cavity, the heat preservation middle body and the isolation cavity; the impeller is positioned in the pump cavity and arranged at one end of the pump shaft; the inner rotor is positioned in the isolation cavity and sleeves the pump shaft; and the outer rotor is positioned outside the isolation cavity and is opposite to the inner rotor. The pump body and the heat preservation middle body are each of a jacket heat preservation structure, the heat preservation isolation sleeve and the isolation sleeve are each of a double-isolation-sleeve structure, heat preservation can be carried out in the mode that high-temperature water, high-temperature steam, high-temperature heat conduction oil and the like can be introduced, heat preservation can be carried out on all overflowing parts, dead corners do not exist, and the heat preservation effect is good.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pumps, specifically to a heat-insulating magnetic pump. Background Technology

[0002] In the current market landscape, chemical centrifugal pumps hold over 70% of the market share, demonstrating their widespread application and important position. However, when it comes to transporting easily crystallizing media, chemical centrifugal pumps face severe challenges. Their mechanical seal structure is highly susceptible to problems due to media crystallization, such as the bellows of the compensation mechanism becoming stuck and unable to function properly, or damage to the sealing surface due to friction, leading to pump leakage. This not only disrupts the safe and stable operation of the production process but also significantly reduces the pump's lifespan, increasing operating costs and safety risks for enterprises.

[0003] In comparison, magnetic drive pumps, with their completely leak-free characteristics, have been widely used in the transportation of various flammable, explosive, toxic, harmful, and valuable liquid media, providing a safer and more reliable transportation solution for many industries. However, magnetic drive pumps are not without their flaws; they have high requirements for the purity of the liquid media they transport. If used to transport media that are prone to crystallization, the formation of crystals can damage the internal components of the magnetic drive pump, and in severe cases, may even prevent the pump from starting normally, greatly limiting the application of magnetic drive pumps in certain specific operating conditions.

[0004] To address the challenges of transporting easily crystallizing and temperature-sensitive media, insulated magnetic drive pumps have emerged. This innovative product, derived from magnetic drive pumps, primarily employs a jacketed design around the front half of the pump body and the outer perimeter of the intermediate bearing housing. By introducing steam or heat transfer oil into the insulation jacket, energy exchange occurs between the insulation and the media inside the pump, achieving insulation. However, current insulated magnetic drive pumps still have certain technical limitations. Due to structural and technical reasons, the inner cavity of the insulation jacket cannot achieve effective insulation like the pump body and intermediate bearing housing through a jacket. In practice, the common approach is to pre-infuse the pump body and intermediate bearing housing with the insulation medium for an extended period, then manually rotate the pump body to determine if the medium inside has been sufficiently preheated, thus deciding whether to start the insulated magnetic drive pump. However, this method is not only inefficient but also requires a high level of experience and skill from the operator, introducing uncertainties and safety hazards, making it difficult to meet the demands of modern industrial production for high efficiency, safety, and intelligence. Utility Model Content

[0005] The purpose of this invention is to overcome at least one of the defects of the prior art and provide a heat-insulating magnetic pump.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A thermally insulated magnetic pump, comprising:

[0008] The pump body and the insulation intermediate body together form a pump cavity. The insulation intermediate body includes an inner wall and an outer wall arranged from the inside to the outside, and a first ring plate and a second ring plate respectively arranged on both sides of the inner wall and the outer wall. The outer wall is provided with an insulation medium inlet and an insulation medium outlet. A circulation pipe is provided between the inner wall and the outer wall, penetrating the first ring plate and the second ring plate.

[0009] An isolation sleeve assembly is formed by enclosing an isolation cavity with the side of the insulation intermediate body away from the pump body. The isolation sleeve assembly includes an inner isolation sleeve and an outer isolation sleeve arranged sequentially from the inside to the outside. The outer isolation sleeve is provided with an insulation medium inlet and an insulation medium outlet.

[0010] A pump shaft that penetrates the pump cavity, the thermal insulation intermediate body, and the isolation cavity;

[0011] An impeller located inside the pump chamber and disposed at one end of the pump shaft;

[0012] An inner rotor located within the isolation chamber and sleeved on the pump shaft;

[0013] An outer rotor located outside the isolation cavity and positioned opposite to the inner rotor.

[0014] Furthermore, a bearing mechanism is provided on the pump shaft. The bearing mechanism includes a retaining sleeve and bearing assemblies respectively disposed on both sides of the retaining sleeve. The bearing assembly includes a bushing, a sliding bearing, and a bearing seat disposed on the pump shaft from the inside to the outside.

[0015] Furthermore, a pair of thrust discs are also provided on the pump shaft, and the pair of thrust discs are respectively located on both sides of the bearing mechanism.

[0016] Furthermore, the outer isolation sleeve is an insulated isolation sleeve.

[0017] Furthermore, the thermal insulation sleeve is an insulation sleeve formed by pressing polyetheretherketone and carbon fiber in a high-temperature mold.

[0018] Furthermore, an impeller nut is provided between the pump shaft and the impeller for connecting the two.

[0019] Furthermore, the pump body is provided with an inlet for heat-insulating medium and an outlet for heat-insulating medium.

[0020] Furthermore, a connecting ring is provided on the outer side of the insulation intermediate body, and the connecting ring abuts against the end face of the pump body.

[0021] Furthermore, a gasket is provided at the point where the connecting ring abuts against the end face of the pump body.

[0022] Furthermore, the insulated magnetic pump is also equipped with a chassis located on the lower end face of the pump body.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] (1) This utility model provides a heat-insulating magnetic pump. The pump body and the heat-insulating intermediate body of the heat-insulating magnetic pump are both jacketed heat-insulating structures. The heat-insulating isolation sleeve and the isolation sleeve are double isolation sleeve structures. They can be heat-insulated by passing in high-temperature water, high-temperature steam, high-temperature heat transfer oil, etc. All flow parts can be heat-insulated without dead corners and have good heat-insulating effect.

[0025] (2) This utility model provides a heat-insulating magnetic pump. The heat-insulating magnetic pump uses a heat-insulating isolation sleeve made of polyether ether ketone and carbon fiber, which effectively avoids the generation of eddy current heat and significantly improves the efficiency of the pump. It is formed by high temperature mold pressing, which is simple process and low manufacturing cost. It can also be customized according to actual needs. It can withstand high temperature of 250℃ and pressure of 1.6MPa, and does not generate eddy current heat during use. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the thermal insulation magnetic pump in the embodiment;

[0027] Figure 2 This is one of the partial views of the thermal insulation magnetic pump in the embodiment;

[0028] Figure 3 This is one of the partial views of the thermal insulation magnetic pump in the embodiment;

[0029] Figure 4 This is a diagram of the medium circulation loop in the thermal insulation magnetic pump in the embodiment;

[0030] The numbers in the diagram indicate: 1-Pump body; 101-First insulation medium inlet; 102-First insulation medium outlet; 2-Impeller; 3-Impeller nut; 4-Pump shaft; 5-Insulation intermediate body; 51-Outer wall; 52-Circulation pipe; 53-First ring plate; 54-Inner wall; 55-Second ring plate; 56-Second insulation medium inlet; 57-Second insulation medium outlet; 6-Sealing gasket; 7-Bearing seat; 8-Side sleeve; 9-Shaft sleeve; 10-Sliding bearing; 11-Thrust disc; 12-Inner rotor; 13-Isolation sleeve; 14-Insulation isolation sleeve; 141-Third insulation medium inlet; 142-Third insulation medium outlet; 15-Outer rotor; 16-Chassis. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0032] Example

[0033] This embodiment provides a heat-insulating magnetic pump; see the specific structure below. Figure 1-3 ,include:

[0034] The pump body 1 and the insulation intermediate body 5 together form a pump cavity. The insulation intermediate body 5 includes an inner wall 54 and an outer wall 51 arranged from the inside to the outside, and a first ring plate 53 and a second ring plate 55 respectively arranged on both sides of the inner wall 54 and the outer wall 51. The outer wall 51 is provided with a second insulation medium inlet 56 and a second insulation medium outlet 57. A circulation pipe 52 is provided between the inner wall 54 and the outer wall 51, penetrating the first ring plate 53 and the second ring plate 55.

[0035] An isolation sleeve assembly is formed by surrounding the side of the insulation intermediate body 5 away from the pump body 1 to form an isolation cavity. The isolation sleeve assembly includes an inner isolation sleeve 13 and an outer isolation sleeve 14 arranged sequentially from the inside to the outside. The outer isolation sleeve 14 is provided with a third insulation medium inlet 141 and a third insulation medium outlet 142.

[0036] A pump shaft 4 that penetrates the pump cavity, the thermal insulation intermediate body 5, and the isolation cavity;

[0037] An impeller 4 is located inside the pump chamber and is disposed at one end of the pump shaft 4;

[0038] The inner rotor 12 is located inside the isolation chamber and sleeved on the pump shaft 7;

[0039] The outer rotor 15 is located outside the isolation cavity and is disposed opposite to the inner rotor 12.

[0040] In this embodiment, a bearing mechanism is provided on the pump shaft 4. The bearing mechanism includes a retaining sleeve 8 and bearing assemblies respectively disposed on both sides of the retaining sleeve 8. The bearing assembly includes a bushing 9, a sliding bearing 10 and a bearing seat 7 disposed on the pump shaft 4 from the inside to the outside.

[0041] In this embodiment, a pair of thrust discs 11 are also provided on the pump shaft 4, and the pair of thrust discs 11 are respectively disposed on both sides of the bearing mechanism. Preferably, the outer isolation sleeve 14 is a thermal insulation isolation sleeve; the thermal insulation isolation sleeve is an isolation sleeve formed by pressing polyetheretherketone and carbon fiber in a high-temperature mold.

[0042] In this embodiment, an impeller nut 3 is provided between the pump shaft 7 and the impeller 2 to connect the two.

[0043] In this embodiment, the pump body 1 is provided with a first thermal insulation medium inlet 141 and a first thermal insulation medium outlet 142.

[0044] In this embodiment, a connecting ring is provided on the outer side of the heat-insulating intermediate body 5, and the connecting ring abuts against the end face of the pump body.

[0045] In this embodiment, a gasket 6 is provided at the point where the connecting ring abuts against the end face of the pump body.

[0046] In this embodiment, the heat-insulating magnetic pump is also provided with a chassis 24 located on the lower end face of the pump body 1.

[0047] Working principle:

[0048] In this embodiment, the heat-insulating magnetic pump has a jacketed heat-insulating cavity on the outside of the pump body 1. The heat-insulating intermediate body 5 has a double-layer jacketed structure, and external heat-insulating medium inlet and outlet are provided on its surface. During normal operation, high-temperature water, high-temperature steam, high-temperature heat transfer oil, etc. can be introduced to keep the pump warm and ensure that the conveyed medium will not crystallize or solidify.

[0049] Furthermore, in this embodiment, the inner isolation sleeve 13 and the outer isolation sleeve 14 of the insulated magnetic pump are sealed by a gasket. A 2mm air gap is provided on the radial cylindrical structure. The insulation medium inlet on the flange of the outer isolation sleeve 14 is connected to high-temperature water, high-temperature steam, or high-temperature heat transfer oil to ensure sufficient insulation of the material inside the isolation sleeve cavity. The outer isolation sleeve 13 is made of non-metallic materials, polyetheretherketone (PEEK) and carbon fiber, molded using a high-temperature die. This isolation sleeve features high pressure resistance, high temperature resistance, and no eddy current loss. Compared to metal isolation sleeves, its efficiency can be increased by 8% to 12%.

[0050] This embodiment also employs a high-low pressure circulation method. After the medium is pressurized through the impeller 2 blade channel, it enters the circulation pipe within the insulation intermediate body 5, is transported to the inner cavity of the isolation sleeve 13, and then flows back to the low-pressure area at the impeller 2 inlet through the central hole of the pump shaft 4. The entire circulation loop remains under insulation, preventing crystallization and resulting in smoother pump circulation and lubrication. Figure 4 The arrow is pointing to.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A heat-insulating magnetic pump, characterized in that, include: The pump body (1) and the insulation intermediate body (5) together form a pump cavity. The insulation intermediate body (5) includes an inner wall (54) and an outer wall (51) arranged from the inside to the outside, and a first ring plate (53) and a second ring plate (55) respectively arranged on both sides of the inner wall (54) and the outer wall (51). The outer wall (51) is provided with an insulation medium inlet and an insulation medium outlet. A circulation pipe (52) is provided between the inner wall (54) and the outer wall (51) and passes through the first ring plate (53) and the second ring plate (55). An isolation sleeve assembly is formed by enclosing the side of the insulation intermediate (5) away from the pump body (1) to form an isolation cavity. The isolation sleeve assembly includes an inner isolation sleeve (13) and an outer isolation sleeve (14) arranged sequentially from the inside to the outside. The outer isolation sleeve (14) is provided with an insulation medium inlet and an insulation medium outlet. A pump shaft (4) that runs through the pump cavity, the insulation intermediate body (5), and the isolation cavity; An impeller (2) is located inside the pump chamber and is disposed at one end of the pump shaft (4); An inner rotor (12) is located inside the isolation chamber and sleeved on the pump shaft (4). An outer rotor (15) is located outside the isolation cavity and is disposed opposite to the inner rotor (12).

2. The heat-insulating magnetic pump according to claim 1, characterized in that, The pump shaft (4) is provided with a bearing mechanism, which includes a retaining sleeve (8) and bearing assemblies respectively disposed on both sides of the retaining sleeve (8). The bearing assembly includes a bushing (9), a sliding bearing (10) and a bearing seat (7) disposed on the pump shaft (4) from the inside to the outside.

3. A heat-insulating magnetic pump according to claim 2, characterized in that, A pair of thrust discs (11) are also provided on the pump shaft (4), and the pair of thrust discs (11) are respectively provided on both sides of the bearing mechanism.

4. A heat-insulating magnetic pump according to claim 1, characterized in that, The outer isolation sleeve (14) is a thermal insulation isolation sleeve.

5. A heat-insulating magnetic pump according to claim 4, characterized in that, The thermal insulation sleeve is an insulation sleeve formed by pressing polyetheretherketone and carbon fiber in a high-temperature mold.

6. A heat-insulating magnetic pump according to claim 1, characterized in that, An impeller nut (3) is provided between the pump shaft (4) and the impeller (2) for connecting the two.

7. A thermal insulation magnetic pump according to claim 1, characterized in that, The pump body (1) is provided with an inlet for heat-insulating medium and an outlet for heat-insulating medium.

8. A heat-insulating magnetic pump according to claim 1, characterized in that, The outer side of the insulation intermediate (5) is provided with a connecting ring, which abuts against the end face of the pump body.

9. A heat-insulating magnetic pump according to claim 8, characterized in that, A gasket (6) is provided at the point where the connecting ring abuts against the end face of the pump body.

10. A thermal insulation magnetic pump according to claim 1, characterized in that, The heat-insulating magnetic pump is also equipped with a chassis (24) located on the lower end face of the pump body (1).

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