Welding process for high-temperature heat preservation pump cover of magnetic drive pump

Abstract

The invention discloses a welding process for a high-temperature heat preservation pump cover of a magnetic drive pump, and the high-temperature heat preservation pump cover comprises a pump body side plate, a connecting frame side plate, a heat preservation jacket, a bearing seat pipe and a flushing pipe; the welding process of the high-temperature heat preservation pump cover comprises the steps that turning correction treatment is conducted on a pump body side plate, a connecting frame side plate, a heat preservation jacket, a bearing seat pipe and a flushing pipe, a seam allowance is turned, and a welding groove needing to be inverted is welded; the pump body side plate, the connecting frame side plate, the heat preservation jacket, the bearing seat pipe and the flushing pipe are subjected to tailor welding; welding of the high-temperature heat preservation pump cover is completed, and the whole high-temperature heat preservation pump cover is subjected to destressing treatment. Compared with the prior art, the sealing performance problem caused by poor assembly quality of the high-temperature heat preservation pump cover of the magnetic pump is solved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic pumps, and in particular to a welding process for a high-temperature heat-insulating pump cover of a magnetic pump. Background Art

[0002] The magnetic pump consists of three parts: the pump, the magnetic transmission and the motor. The key component, the magnetic transmission, consists of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic isolation sleeve. When the motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic materials, driving the inner magnetic rotor connected to the impeller to rotate synchronously, realizing contactless transmission of power and converting dynamic seals into static seals.

[0003] Conventional ordinary magnetic pumps are metal magnetic pumps, which need to be insulated for easy solidification and crystallization conditions, specifically using high-temperature insulation pump covers to achieve insulation. In the existing assembly process of high-temperature insulation pump covers, sealing problems are prone to occur, causing the high-temperature insulation magnetic pump to become stuck due to medium solidification, affecting the reliability and safety of the magnetic pump. Summary of the invention

[0004] The purpose of the present invention is to provide a welding process for a high-temperature thermal insulation pump cover of a magnetic pump to solve the sealing problem caused by poor assembly quality of the high-temperature thermal insulation pump cover of the magnetic pump.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a welding process for a high-temperature heat-insulating pump cover of a magnetic pump, the high-temperature heat-insulating pump cover comprises: a pump body side plate, a connecting frame side plate, a heat-insulating jacket, a bearing seat tube and a flushing pipe, the pump body side plate is arranged at one end of the bearing seat tube, the connecting frame side plate is sleeved on the bearing seat tube, the heat-insulating jacket is arranged between the pump body side plate and the connecting frame side plate, the heat-insulating jacket and the bearing seat tube form a heat-insulating chamber, and the flushing pipe passes through the heat-insulating chamber;

[0006] The welding process of high temperature insulation pump cover includes the following steps:

[0007] S1. Turn and correct the pump body side plates, connecting frame side plates, insulation jackets, bearing seat tubes and flushing pipes, and turn the stoppers and welding grooves that need to be reversed;

[0008] S2, welding the pump body side plate and the bearing seat tube, forming a first weld at the outer joint of the pump body side plate and the bearing seat tube, and forming a second weld in the V-shaped groove formed at the inner joint of the pump body side plate and the bearing seat tube;

[0009] S3, welding the insulation jacket and the pump body side plate, and forming a third weld at the joint of the pump body side plate and the insulation jacket;

[0010] S4, welding the side plate of the connecting frame, the thermal insulation jacket, and the bearing seat tube, so that a fourth weld is formed at the joint of the side plate of the connecting frame and the thermal insulation jacket, and a fifth weld is formed at the joint of the side plate of the connecting frame and the bearing seat tube;

[0011] S5. Process a drain hole and a steam hole on the side wall of the insulation jacket, weld a drain pipe at the drain hole, and weld a steam pipe at the steam hole;

[0012] S6. Drill several first mounting holes on the pump body side plate, and drill several second mounting holes on the connecting frame side plate. One first mounting hole corresponds to one second mounting hole. Insert the flushing pipe into the first mounting hole of the pump body side plate 1 and the second mounting hole of the connecting frame side plate. Weld the two ends of the flushing pipe to the pump body side plate and the connecting frame side plate respectively to complete the welding of the high-temperature insulation pump cover.

[0013] S7. Perform stress relief treatment on the high-temperature insulation pump cover as a whole.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0015] 1. In the present invention, the high-temperature insulation pump cover is formed by welding to complete the isolation of the insulation chamber, effectively ensure the sealing of the high-temperature insulation pump cover, and improve the insulation capacity. The high-temperature insulation pump cover based on the welding process has high reliability, safety, and practicality, and can stably solve the solidification and jamming problem of the medium of the high-temperature insulation magnetic pump.

[0016] 2. In the present invention, the welding process of the high-temperature thermal insulation pump cover causes residual welding stress, and the stress is released through stress relief treatment to prevent the high-temperature thermal insulation pump cover from affecting the stable operation of the entire pump and causing damage to other parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A cross-sectional view of a high-temperature insulation pump cover in the welding process of a magnetic pump high-temperature insulation pump cover Figure 1 .

[0019] Figure 2 A cross-sectional view of a high-temperature insulation pump cover in the welding process of a magnetic pump high-temperature insulation pump cover Figure 2 .

[0020] Figure 3This is a schematic diagram of the side view structure of a high-temperature thermal insulation pump cover in a welding process of a magnetic pump high-temperature thermal insulation pump cover.

[0021] Figure 4 for Figure 3 BB section view.

[0022] Legend:

[0023] 1. Pump body side plate; 11. First weld; 12. Second weld; 2. Insulation jacket; 21. Third weld; 3. Connecting frame side plate; 4. Flushing pipe; 41. Sixth weld; 42. Seventh weld; 5. Bearing seat tube; 51. Fifth weld; 6. Drain hole; 7. Steam hole; 71. Steam pipe; 9. Insulation chamber. DETAILED DESCRIPTION

[0024] 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. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying 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 creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] 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 direct connection, or an indirect connection 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.

[0029] Example 1

[0030] See also Figure 1-4 The present invention provides a technical solution: a welding process for a high-temperature heat-insulating pump cover of a magnetic pump, wherein the high-temperature heat-insulating pump cover comprises: a pump body side plate 1, a connecting frame side plate 3, a heat-insulating jacket 2, a bearing seat tube 5 and a flushing pipe 4, wherein the pump body side plate 1 is arranged at one end of the bearing seat tube 5, the connecting frame side plate 3 is sleeved on the bearing seat tube 5, the heat-insulating jacket 2 is arranged between the pump body side plate 1 and the connecting frame side plate 3, and a heat-insulating chamber 9 is formed between the heat-insulating jacket 2 and the bearing seat tube 5, and the flushing pipe 4 passes through the heat-insulating chamber;

[0031] The welding process of high temperature insulation pump cover includes the following steps:

[0032] S1. Perform turning and correction processing on the pump body side plate 1, the connecting frame side plate 3, the insulation jacket 2, the bearing seat tube 5 and the flushing pipe 4, turn the stopper and the welding groove required for welding, and reserve welding deformation allowance and processing allowance during turning;

[0033] S2, welding the pump body side plate 1 and the bearing seat tube 5, forming a first weld 11 at the outer joint of the pump body side plate 1 and the bearing seat tube 5, and forming a second weld 12 in the V-shaped groove formed at the inner joint of the pump body side plate 1 and the bearing seat tube 5;

[0034] S3, welding the heat-insulating jacket 2 to the pump body side plate 1, and forming a third weld 21 at the joint of the pump body side plate 1 and the heat-insulating jacket 2;

[0035] S4, welding the connecting frame side plate 3, the heat preservation jacket 2 and the bearing seat tube 5, forming a fourth weld at the joint of the connecting frame side plate 3 and the heat preservation jacket 2, and forming a fifth weld 51 at the joint of the connecting frame side plate 3 and the bearing seat tube 5;

[0036] S5, processing a drain hole 6 and a steam hole 7 on the side wall of the insulation jacket 2, welding a drain pipe at the drain hole 6, and welding a steam pipe 71 at the steam hole 7;

[0037] S6. Drill several first mounting holes on the pump body side plate 1, and drill several second mounting holes on the connecting frame side plate 3. One first mounting hole corresponds to one second mounting hole. Insert the flushing pipe 4 into the first mounting hole of the pump body side plate 1 and the second mounting hole of the connecting frame side plate 3. Weld the two ends of the flushing pipe 4 to the pump body side plate 1 and the connecting frame side plate 3, respectively, to complete the welding of the high-temperature insulation pump cover.

[0038] S7. Perform stress relief treatment on the high-temperature insulation pump cover as a whole.

[0039] In step S5, before drilling and welding the flushing pipe 4, drainage holes 6 and steam holes 7 are processed on the side wall of the insulation jacket 2 to avoid interference between the drill bit and the flushing pipe 4 or damage to the flushing pipe during the drilling process.

[0040] The high-temperature insulation pump cover is formed by welding to complete the isolation of the insulation chamber, effectively ensure the sealing of the high-temperature insulation pump cover, and improve the insulation capacity. The high-temperature insulation pump cover based on this welding process has high reliability, safety, and practicality, and can stably solve the solidification and jamming problem of the medium of the high-temperature insulation magnetic pump.

[0041] The welding process of the high-temperature insulation pump cover causes residual welding stress. The stress is released through stress relief treatment to prevent the high-temperature insulation pump cover from affecting the stable operation of the entire pump and causing damage to other parts. The high-temperature insulation pump cover with welding stress removed is processed through rough turning, fine turning and other processing steps according to normal processing steps, and the sealing of the welding needs to be pressure tested after the processing is completed.

[0042] Specifically, the gas source is connected through the flange at the end of one steam pipe 71, steam is passed into the heat preservation chamber 9, and the other steam pipe 71 is blocked. Under a pressure of not less than 1.6 MPa, if there is no leakage, sweating or other defects, the welding quality is qualified.

[0043] Working principle: In the process of raw material reporting, reserve welding deformation allowance and processing allowance to avoid processing that cannot produce the processing size required by the drawing. One end of the high-temperature insulation pump cover is connected to the pump body through the pump body side plate 1, and the other end is connected to the connecting frame through the connecting frame side plate 3. The medium circulates among the pump body, flushing pipe 4, connecting frame, and bearing seat pipe 5. The inner circulation pipeline form of the conveying medium is completely surrounded by the insulation jacket 2. For the specific circulation process, please refer to the attached Figure 1 The medium circulation path in the flushing pipe 4 shown by the middle arrow has a more reliable structure and improves the thermal insulation effect.

[0044] Example 2

[0045] This embodiment further provides the following improved technical solutions based on the above embodiment: In step S2, the pump body side plate 1 and the bearing seat tube 5 are welded by multi-layer welding. Low welding height and multiple weld overlaps are used during welding to prevent excessive deformation and improve welding quality.

[0046] The same is true for the welding in step S3 and step S4.

[0047] Example 3

[0048] This embodiment further makes the following improved technical solutions on the basis of the above embodiments: in step S3, before welding, the insulation jacket 2 is inserted into the annular groove on the pump body side plate 1 to improve the sealing between the insulation jacket 2 and the pump body side plate 1 and improve the insulation effect of the pump cover.

[0049] Example 4

[0050] Based on the above embodiments, the present embodiment further makes the following improved technical solutions: in step S4, an arc groove is provided on one end face of the connecting frame side plate 3, and the fifth weld 51 is provided in the gap between the arc groove and the outer wall of the bearing seat tube 5, so as to effectively ensure the welding quality between the connecting frame side plate 3 and the bearing seat tube 5, further improve the sealing performance of the heat preservation chamber 9, and improve the heat preservation effect of the pump cover.

[0051] Example 5

[0052] This embodiment further provides the following improved technical solutions based on the above embodiments: in step S5 , the steam hole 7 is a cylindrical countersunk hole, which is convenient for fixing the steam pipe 71 .

[0053] Example 6

[0054] Based on the above embodiments, the present embodiment further makes the following improved technical solutions: in step S6, a first annular groove is provided on the end face of the pump body side plate 1, a first mounting hole is provided on the bottom face of the first annular groove, and a sixth weld 41 is formed in the gap between the first annular groove and the outer wall of the flushing pipe 4, thereby effectively improving the welding quality between the pump body side plate 1 and the flushing pipe 4.

[0055] Example 7

[0056] Based on the above embodiments, the present embodiment further makes the following improved technical solutions: in step S6, a second annular groove is provided on the end face of the connecting frame side plate 3, and a second mounting hole is provided on the bottom face of the second annular groove, and a seventh weld 42 is formed in the gap between the second annular groove and the outer wall of the flushing pipe 4, thereby effectively improving the welding quality between the connecting frame side plate 3 and the flushing pipe 4.

[0057] 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 according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding process for a high-temperature insulation pump cover of a magnetic pump, characterized in that: The high-temperature heat preservation pump cover comprises: a pump body side plate, a connecting frame side plate, a heat preservation jacket, a bearing seat tube and a flushing pipe, wherein the pump body side plate is arranged at one end of the bearing seat tube, the connecting frame side plate is sleeved on the bearing seat tube, the heat preservation jacket is arranged between the pump body side plate and the connecting frame side plate, a heat preservation chamber is formed between the heat preservation jacket and the bearing seat tube, and the flushing pipe passes through the heat preservation chamber; The welding process of the high temperature insulation pump cover comprises the following steps: S1. Turn and correct the pump body side plates, connecting frame side plates, insulation jackets, bearing seat tubes and flushing pipes, and turn the stoppers and welding grooves that need to be reversed; S2, welding the pump body side plate and the bearing seat tube, forming a first weld at the outer joint of the pump body side plate and the bearing seat tube, and forming a second weld in the V-shaped groove formed at the inner joint of the pump body side plate and the bearing seat tube; S3, welding the insulation jacket and the pump body side plate, and forming a third weld at the joint of the pump body side plate and the insulation jacket; S4, welding the side plate of the connecting frame, the thermal insulation jacket, and the bearing seat tube, so that a fourth weld is formed at the joint of the side plate of the connecting frame and the thermal insulation jacket, and a fifth weld is formed at the joint of the side plate of the connecting frame and the bearing seat tube; S5. Process a drain hole and a steam hole on the side wall of the insulation jacket, weld a drain pipe at the drain hole, and weld a steam pipe at the steam hole; S6. Drill several first mounting holes on the pump body side plate, and drill several second mounting holes on the connecting frame side plate. One first mounting hole corresponds to one second mounting hole. Insert the flushing pipe into the first mounting hole of the pump body side plate and the second mounting hole of the connecting frame side plate. Weld the two ends of the flushing pipe to the pump body side plate and the connecting frame side plate respectively to complete the welding of the high-temperature insulation pump cover. S7. Perform stress relief treatment on the high-temperature insulation pump cover as a whole.

2. The welding process of a high temperature insulation pump cover of a magnetic pump according to claim 1 is characterized in that: In step S2, the pump body side plate and the bearing seat tube are welded by multi-layer welding.

3. The welding process of a high temperature insulation pump cover of a magnetic pump according to claim 1 is characterized in that: In step S3, before welding, the thermal insulation jacket is inserted into the annular groove on the side plate of the pump body.

4. The welding process of a high temperature insulation pump cover of a magnetic pump according to claim 1 is characterized in that: In step S4, an arc-shaped groove is arranged on one end surface of the side plate of the connecting frame, and the fifth weld is arranged in the gap between the arc-shaped groove and the outer wall of the bearing seat tube.

5. The welding process of a high temperature insulation pump cover of a magnetic pump according to claim 1 is characterized in that: In step S5, the steam hole is a cylindrical countersunk hole.

6. The welding process of a high temperature insulation pump cover of a magnetic pump according to claim 1 is characterized in that: In step S6, a first annular groove is provided on the end surface of the pump body side plate, a first mounting hole is provided on the bottom surface of the first annular groove, and a sixth weld is formed in the gap between the first annular groove and the outer wall of the flushing pipe.

7. The welding process of a high temperature insulation pump cover of a magnetic pump according to claim 1 is characterized in that: In step S6, a second annular groove is provided on the end surface of the side plate of the connecting frame, a second mounting hole is provided on the bottom surface of the second annular groove, and a seventh weld is formed in the gap between the second annular groove and the outer wall of the flushing pipe.

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