Integrated design structure of spacer sleeve of magnetic drive pump

Abstract

The utility model discloses a magnetic drive pump spacer sleeve integrated design structure which comprises a spacer sleeve body, the spacer sleeve body comprises an annular installation pad, a magnetic coupling cylinder and an end cover, the two ends of the magnetic coupling cylinder are connected with the annular installation pad and the end cover respectively, and the magnetic coupling cylinder is connected with the annular installation pad and the end cover. The annular mounting pad, the magnetic coupling cylinder and the end cover are integrally formed by punching, and the annular mounting pad is connected with a magnetic drive pump; the magnetic drive pump comprises a pump body, a motor and a connecting frame, the annular mounting pad is located between the pump body and the connecting frame and fixed through a first bolt, the first bolt sequentially penetrates through the connecting frame and the annular mounting pad to be connected with the pump body, and the end, away from the pump body, of the connecting frame is connected with the motor. Compared with the prior art, the magnetic drive pump isolation sleeve can solve the problem that an existing magnetic drive pump isolation sleeve is poor in sealing effect.

Description

Technical Field

[0001] The utility model belongs to the field of magnetic pumps, and in particular relates to an integrated design structure of an isolation sleeve of a magnetic pump. Background Art

[0002] The production method of the isolation sleeve of the traditional magnetic pump has the following problems:

[0003] 1. The isolation sleeves made of stainless steel, which are commonly used at present, have the advantages of corrosion resistance, long life, and easy processing, but their fatal weakness is that when the magnetic lines pass through the isolation sleeve, magnetic eddy currents will be generated, resulting in large energy loss, which will be converted into heat energy and accumulated on the surface of the isolation sleeve, causing the temperature to rise. The speed of the magnetic pump is very high, and the characteristics of the eddy currents are that the higher the speed, the more severe the eddy currents, the greater the energy loss, the faster the temperature rises, and in severe cases, it will cause the demagnetization of the permanent magnets of the inner and outer rotors; it may even cause unsafe hidden dangers when conveying flammable and explosive media.

[0004] 2. Although the isolation sleeve made of ceramic will not produce eddy current and other phenomena, the ceramic material is very brittle. In order to make it durable, the wall thickness of the product must be increased, making its structure bulky. In particular, due to the wall thickness, the gap between the outer magnetic rotor and the inner magnetic rotor is too large, the magnetic loss is still very large, and the life is not long and it is unsafe.

[0005] 3. Some people have thought of using plastic to make isolation sleeves. Even if magnetic eddy currents will not occur, plastic is a thermoplastic material. Even high-polymer liquid crystal polyester is not heat-resistant. Its performance deteriorates rapidly above 80°C and it is difficult to withstand the pressure of the medium in the pump body. The material is prone to creep and aging, which is its fatal weakness.

[0006] In summary, various isolation sleeves in the prior art cannot meet the requirements of high sealing technology of magnetic pumps. Utility Model Content

[0007] The utility model aims to solve the problem of poor sealing effect of the existing magnetic pump isolation sleeve and provide an integrated design structure of the magnetic pump isolation sleeve.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: an integrated design structure of a magnetic pump isolation sleeve, comprising: an isolation sleeve body, the isolation sleeve body comprising an annular mounting pad, a magnetic coupling cylinder and an end cover, the two ends of the magnetic coupling cylinder are respectively connected to the annular mounting pad and the end cover, the annular mounting pad, the magnetic coupling cylinder and the end cover are integrally stamped, and the annular mounting pad is connected to the magnetic pump;

[0009] The magnetic pump includes a pump body, a motor and a connecting frame. The annular mounting pad is located between the pump body and the connecting frame and is fixed by a first bolt. The first bolt passes through the connecting frame and the annular mounting pad in sequence and is connected to the pump body. The end of the connecting frame away from the pump body is connected to the motor.

[0010] As a further description of the above technical solution:

[0011] The connection points between the magnetic coupling cylinder and the end cover and the annular mounting pad are respectively transitioned through arc surfaces.

[0012] As a further description of the above technical solution:

[0013] A cone protruding into the magnetic coupling cylinder is arranged at the center of the end cover.

[0014] As a further description of the above technical solution:

[0015] An inner magnetic rotor and an outer magnetic rotor are arranged in the pump body, the inner magnetic rotor is sleeved on the pump shaft, the outer magnetic rotor is connected to the driving shaft of the motor, the inner magnetic rotor is located on the inner side of the magnetic coupling cylinder, and the outer magnetic rotor is located on the outer side of the magnetic coupling cylinder.

[0016] As a further description of the above technical solution:

[0017] The outer magnetic rotor includes a fixed seat, a magnetic block fixing ring, a magnetic block and an anti-wear ring. The fixed seat is connected to the drive shaft. The magnetic block fixing ring is detachably connected to the fixed seat. The magnetic block fixing ring is provided with a mounting groove. The magnetic block is arranged in the mounting groove. The anti-wear ring is detachably connected to an end of the magnetic block fixing ring away from the fixed seat.

[0018] As a further description of the above technical solution:

[0019] The magnetic block fixing ring is detachably connected to the fixing seat and the anti-wear ring through second bolts.

[0020] To sum up, due to the adoption of the above-mentioned technical scheme, the beneficial effects of the utility model are as follows: the annular mounting pad, magnetic coupling cylinder and end cover that constitute the isolation sleeve body are formed by integral stamping, and the connection strength is good and the sealing effect is better; the annular mounting pad is pressed together with the pump cover and connecting frame of the pump body and then fixed with the first bolt, which can improve the stability of the connection of the annular mounting pad, achieve better sealing effect, and is easy to disassemble, and convenient for maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The schematic diagram is a structural diagram of an integrated design structure of a magnetic pump isolation sleeve.

[0023] Figure 2 This is a structural schematic diagram of a medium magnetic pump with an integrated magnetic pump isolation sleeve design structure.

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 This is a schematic diagram of the internal structure of a middle pump body with an integrated design structure of a magnetic pump isolation sleeve.

[0026] Legend:

[0027] 1. Isolation sleeve body; 11. Annular mounting pad; 12. Magnetic coupling cylinder; 13. End cover; 2. Magnetic pump; 21. Pump body; 22. Motor; 23. Connecting frame; 3. First bolt; 4. Cone; 5. Inner magnetic rotor; 6. Outer magnetic rotor; 61. Fixed seat; 62. Magnetic block fixing ring; 63. Magnetic block; 64. Anti-wear ring; 7. Second bolt. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4 The utility model provides a technical solution: an integrated design structure of a magnetic pump isolation sleeve, which includes: an isolation sleeve body 1, the isolation sleeve body 1 includes an annular mounting pad 11, a magnetic coupling cylinder 12 and an end cover 13, the two ends of the magnetic coupling cylinder 12 are respectively connected to the annular mounting pad 11 and the end cover 13, the annular mounting pad 11, the magnetic coupling cylinder 12 and the end cover 13 are integrally stamped, and the annular mounting pad 11 is connected to the magnetic pump 2;

[0030] The magnetic pump 2 includes a pump body 21, a motor 22 and a connecting frame 23. The annular mounting pad 11 is located between the pump body 21 and the connecting frame 23 and is fixed by a first bolt 3. The first bolt 3 passes through the connecting frame 23 and the annular mounting pad 11 in sequence and is connected to the pump body 21. The end of the connecting frame 23 away from the pump body 21 is connected to the motor 22.

[0031] The connection between the magnetic coupling cylinder 12 and the end cover 13 and the annular mounting pad 11 is respectively transitioned through an arc surface. A cone 4 protruding into the magnetic coupling cylinder 12 is set at the center of the end cover 13. In this way, the cone and the arc surface form a curved buffer zone, which can prevent breakage due to thermal expansion and contraction, and increase the strength and high-voltage use range of the isolation sleeve. A cone protruding into the magnetic coupling cylinder is made at the center of the end cover. The roundness of the magnetic coupling cylinder can be guaranteed, and the pressure resistance and erosion resistance of the product are improved. It has good sealing performance and a long service life.

[0032] An inner magnetic rotor 5 and an outer magnetic rotor 6 are provided in the pump body 21. The inner magnetic rotor 5 is sleeved on the pump shaft, and the outer magnetic rotor 6 is connected to the driving shaft of the motor 22. The inner magnetic rotor 5 is located on the inner side of the magnetic coupling cylinder 12, and the outer magnetic rotor 6 is located on the outer side of the magnetic coupling cylinder 12.

[0033] The outer magnetic rotor 6 includes a fixed seat 61, a magnetic block fixed ring 62, a magnetic block 63 and an anti-wear ring 64. The fixed seat 61 is connected to the drive shaft. The magnetic block fixed ring 62 is detachably connected to the fixed seat 61. The magnetic block fixed ring 62 is provided with a mounting groove. The magnetic block 3 is arranged in the mounting groove. The anti-wear ring 64 is detachably connected to the end of the magnetic block fixed ring 62 away from the fixed seat 61. The magnetic block fixed ring 62 is detachably connected to the fixed seat 61 and the anti-wear ring 64 respectively by the second bolt 7. In this way, it is convenient to disassemble and repair the magnetic block. When replacing or repairing the magnetic block, the second bolt between the fixed seat and the magnetic block fixed ring can be loosened. The magnetic block fixed ring can be disassembled without disassembling the fixed seat. After loosening the second bolt between the anti-wear ring and the magnetic block fixed ring, the magnetic block can be taken out, which is convenient to operate.

[0034] Working principle: The annular mounting pad, magnetic coupling cylinder and end cover that make up the isolation sleeve body are stamped in one piece, with good connection strength and better sealing effect; the annular mounting pad is pressed together with the pump cover and connecting frame of the pump body and then fixed with the first bolt, which can improve the stability of the connection of the annular mounting pad and achieve better sealing effect. It is easy to disassemble and repair and replace, avoiding the problem that the welding position of ordinary isolation sleeves using welding is easy to break under high temperature and high pressure conditions; and has good temperature and pressure resistance: the isolation sleeve product can work safely and reliably under conditions of temperature ≥80℃ and pressure ≥2MPa, with long service life, high precision, and can ensure full sealing.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A magnetic pump isolation sleeve integrated design structure, characterized in that: include: The isolation sleeve body comprises an annular mounting pad, a magnetic coupling cylinder and an end cover, the two ends of the magnetic coupling cylinder are respectively connected to the annular mounting pad and the end cover, the annular mounting pad, the magnetic coupling cylinder and the end cover are integrally stamped, and the annular mounting pad is connected to the magnetic pump; The magnetic pump includes a pump body, a motor and a connecting frame. The annular mounting pad is located between the pump body and the connecting frame and is fixed by a first bolt. The first bolt passes through the connecting frame and the annular mounting pad in sequence and is connected to the pump body. The end of the connecting frame away from the pump body is connected to the motor.

2. The integrated design structure of the magnetic pump isolation sleeve according to claim 1 is characterized in that: The connection points between the magnetic coupling cylinder and the end cover and the annular mounting pad are respectively transitioned through arc surfaces.

3. The integrated design structure of the magnetic pump isolation sleeve according to claim 1 is characterized in that: A cone protruding into the magnetic coupling cylinder is arranged at the center of the end cover.

4. The integrated design structure of the magnetic pump isolation sleeve according to claim 1 is characterized in that: An inner magnetic rotor and an outer magnetic rotor are arranged in the pump body, the inner magnetic rotor is sleeved on the pump shaft, the outer magnetic rotor is connected to the driving shaft of the motor, the inner magnetic rotor is located on the inner side of the magnetic coupling cylinder, and the outer magnetic rotor is located on the outer side of the magnetic coupling cylinder.

5. The integrated design structure of the magnetic pump isolation sleeve according to claim 4 is characterized in that: The outer magnetic rotor includes a fixed seat, a magnetic block fixing ring, a magnetic block and an anti-wear ring. The fixed seat is connected to the drive shaft. The magnetic block fixing ring is detachably connected to the fixed seat. The magnetic block fixing ring is provided with a mounting groove. The magnetic block is arranged in the mounting groove. The anti-wear ring is detachably connected to an end of the magnetic block fixing ring away from the fixed seat.

6. The integrated design structure of the magnetic pump isolation sleeve according to claim 5 is characterized in that: The magnetic block fixing ring is detachably connected to the fixing seat and the anti-wear ring through second bolts.

Images