Corrosion-resistant and dry-grinding-resistant magnetic drive pump

Abstract

The utility model discloses a corrosion-resistant and dry-grinding-resistant magnetic drive pump which comprises a base, the top of the base is fixedly connected with a magnetic drive pump body, a liquid inlet pipe is arranged on the outer side of the top of the magnetic drive pump body, the output end of the magnetic drive pump body is fixedly connected with a rotating shaft, and a lubricating mechanism is arranged on the outer side of the magnetic drive pump body. According to the corrosion-resistant and dry-grinding-resistant magnetic drive pump, in the lubricating mechanism, when the rotating shaft works to generate vibration or the magnetic drive pump operates, the stress cover is subjected to external acting force to drive the moving rod to upwards extrude the elastic oil bag, and the elastic oil bag is driven to rotate; the lubricating agent in the elastic oil bag is sprayed to the rotating shaft through the oil outlet pipe and the oil spraying cover, automatic lubrication is achieved, the automatic lubrication mode can effectively reduce friction between the rotating shaft and other parts, the dry grinding phenomenon is avoided, and therefore the dry grinding resistance of the magnetic drive pump is remarkably improved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pump technology, specifically a corrosion-resistant and dry-wear-resistant magnetic pump. Background Technology

[0002] Unlike traditional sealed pumps, magnetic drive pumps do not have a direct connection between the motor shaft and the pump shaft. Instead, the motor shaft drives an outer magnetic rotor to rotate. This outer magnetic rotor, in turn, works with an inner magnetic rotor, which in turn drives the pump shaft to rotate, causing the impeller rotor on the pump shaft to rotate. A sealed cavity formed by an isolation sleeve exists between the inner and outer magnetic rotors, enclosing the pump shaft and inner magnetic rotor within this cavity. This prevents liquid leakage from the pump shaft end to the outside and also cools the pump shaft and inner magnetic rotor. Therefore, excellent leak-free characteristics can be achieved without the need for traditional dynamic seals on the pump shaft. Consequently, they are widely used to transport various highly toxic, flammable, and explosive hazardous media, playing a vital role in fields such as petroleum, chemical, pharmaceutical, nuclear power, and national defense.

[0003] According to the authorized patent "CN203670229U", a corrosion-resistant and dry-wear-resistant magnetic pump is used. The outer volute wall 1 and the impeller 2 are installed together by a first radial roller bearing 9 and a first axial ball bearing 8. The inner volute wall 3 and the pump shaft 7 are installed together by a second radial roller bearing 11. The impeller 2 and the second radial roller bearing 11 are installed together by a second axial ball bearing 10. This can reduce the vibration and noise caused by poor dynamic balance of the impeller 2, effectively prevent the axial movement of the pump shaft 7 and the impeller 2, greatly reduce the heat generated by friction, and allow the pump to run dry for a certain period of time in the absence or interruption of pumped liquid. This enhances the dry-wear resistance of the magnetic pump and improves the operating safety of the magnetic pump. The pump shaft 7, impeller 2, first radial roller bearing 9, second radial roller bearing 11, first axial ball bearing 8 and second axial ball bearing 10 in the pump cavity are all made of corrosion-resistant materials, which improves the corrosion resistance of the magnetic pump.

[0004] In the aforementioned technical solutions, during the operation of traditional magnetic pumps, the friction between the shaft and other components remains a key factor affecting their performance and service life. The time interval for manually adding lubricant is difficult to precisely match the actual working requirements of the magnetic pump, easily leading to untimely lubrication. This results in dry friction between the shaft and components due to lack of lubrication, accelerating component wear and shortening the equipment's service life. On the other hand, frequent manual operation not only increases labor intensity and labor costs but also carries the risk of operational errors, such as inaccurate lubricant dosage or deviation in the lubrication position, which in turn affects the normal operation of the magnetic pump.

[0005] Therefore, this utility model provides a magnetic pump that is corrosion-resistant and resistant to dry friction. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a corrosion-resistant and dry-wear-resistant magnetic pump to solve the aforementioned problems.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a corrosion-resistant and dry-wear-resistant magnetic pump, including a base, a magnetic pump body fixedly connected to the top of the base, an inlet pipe provided on the outer side of the top of the magnetic pump body, a rotating shaft fixedly connected to the output end of the magnetic pump body, and a lubrication mechanism provided on the outer side of the magnetic pump body.

[0008] The lubrication mechanism includes a lubricant tank, an elastic oil bladder installed inside the lubricant tank, a cover plate snapped onto the top of the lubricant tank, an oil inlet pipe fixedly connected to the top of the elastic oil bladder, a movable rod movably connected to the bottom of the lubricant tank, a force-bearing cover fixedly connected to the bottom of the movable rod, a return spring fixedly connected to the movable rod, an oil outlet pipe fixedly connected to the outside of the elastic oil bladder, and an oil spray cover fixedly connected to the outside of the oil outlet pipe.

[0009] Preferably, a recycling mechanism is provided on the outer side of the base. The recycling mechanism includes a liquid storage tank, a pump is fixedly connected to the outer side of the liquid storage tank, an inlet pipe is fixedly connected to the outer side of the pump, and a return pipe is fixedly connected to the outer side of the pump.

[0010] Preferably, the lubricant tank is fixedly connected to the top outer side of the magnetic pump body, and the top of the oil inlet pipe is fixedly connected to the connection between the cover plate and the lubricant tank.

[0011] Preferably, the movable rod is movably connected to the inside of the lubricant tank via a return spring, and the top of the movable rod is located outside the elastic oil bladder.

[0012] Preferably, the oil outlet pipes are symmetrically distributed on the outside of the elastic oil bladder, and the oil spray cover is fixedly connected to the outside of the rotating shaft through the oil outlet pipes.

[0013] Preferably, the liquid storage tank is fixedly connected to the outside of the base, and the liquid storage tank is located below the rotating shaft.

[0014] Preferably, the inlet pipe is fixedly connected inside the storage tank, and the end of the return pipe away from the pump is fixedly connected inside the elastic oil bladder, with a one-way valve fixedly connected inside the return pipe.

[0015] Beneficial effects

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) In the lubrication mechanism of the corrosion-resistant and dry-wear-resistant magnetic pump, when the rotating shaft vibrates or the magnetic pump is running, the force-bearing cover is subjected to external force, which drives the moving rod to squeeze the elastic oil bladder upward, so that the lubricant in the elastic oil bladder is sprayed onto the rotating shaft through the oil outlet pipe and the oil spray cover to achieve automatic lubrication. This automatic lubrication method can effectively reduce the friction between the rotating shaft and other parts, avoid dry wear, and thus significantly improve the dry wear resistance of the magnetic pump and extend the service life of the equipment.

[0018] (2) The corrosion-resistant and dry-wear-resistant magnetic pump has a liquid storage tank in the recovery mechanism that can collect the lubricant dripping from the shaft. The extraction pump extracts the lubricant from the liquid storage tank through the inlet pipe and transports it to the elastic oil bladder through the return pipe, thereby realizing the recycling of the lubricant. On the one hand, it reduces the waste of lubricant and lowers the cost of use; on the other hand, it avoids the environmental pollution caused by the random dripping of lubricant. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a structural schematic diagram of the other side of this utility model;

[0021] Figure 3 This is a schematic diagram of the outer structure of the lubrication mechanism of this utility model;

[0022] Figure 4 This is a utility model Figure 1 Enlarged view of the structure at point A in the middle.

[0023] In the diagram: 1. Base; 2. Magnetic pump body; 21. Inlet pipe; 22. Rotating shaft; 3. Lubrication mechanism; 31. Lubricant tank; 32. Elastic oil bladder; 33. Cover plate; 34. Oil inlet pipe; 35. Moving rod; 36. Force-bearing cover; 37. Return spring; 38. Oil outlet pipe; 39. Oil spray cover; 4. Recovery mechanism; 41. Storage tank; 42. Extraction pump; 43. Inlet pipe; 44. Return pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4A corrosion-resistant and dry-wear-resistant magnetic pump includes a base 1, a magnetic pump body 2 fixedly connected to the top of the base 1, a liquid guide pipe 21 provided on the outer side of the top of the magnetic pump body 2, a rotating shaft 22 fixedly connected to the output end of the magnetic pump body 2, and a lubrication mechanism 3 provided on the outer side of the magnetic pump body 2.

[0026] The lubrication mechanism 3 includes a lubricant tank 31, an elastic oil bladder 32 installed inside the lubricant tank 31, a cover plate 33 snapped onto the top of the lubricant tank 31, an oil inlet pipe 34 fixedly connected to the top of the elastic oil bladder 32, a moving rod 35 movably connected to the bottom of the lubricant tank 31, a force-bearing cover 36 fixedly connected to the bottom of the moving rod 35, a return spring 37 fixedly connected to the moving rod 35, an oil outlet pipe 38 fixedly connected to the outside of the elastic oil bladder 32, and an oil spray cover 39 fixedly connected to the outside of the oil outlet pipe 38.

[0027] Furthermore: the lubricant tank 31 is fixedly connected to the top outer side of the magnetic pump body 2, the top of the oil inlet pipe 34 is fixedly connected to the connection between the cover plate 33 and the lubricant tank 31, the moving rod 35 is movably connected to the inside of the lubricant tank 31 through the return spring 37, and the top of the moving rod 35 is located on the outer side of the elastic oil bladder 32, the oil outlet pipe 38 is symmetrically distributed on the outer side of the elastic oil bladder 32, and the oil spray cover 39 is fixedly connected to the outer side of the rotating shaft 22 through the oil outlet pipe 38.

[0028] It should be noted that when the corrosion-resistant and dry-wear-resistant magnetic pump is working, the liquid enters the magnetic pump body 2 through the liquid guide pipe 21. Under the action of the impeller inside the magnetic pump body 2, the liquid is pressurized and then transported through the components driven by the rotating shaft 22.

[0029] Specifically: The lubricant tank 31 is fixed to the top outer side of the magnetic pump body 2. The elastic oil bladder 32 installed inside injects lubricant through the oil inlet pipe 34 from the connection between the cover plate 33 and the lubricant tank 31. In the initial state, the moving rod 35 is in a lower position under the action of the return spring 37, and the elastic oil bladder 32 remains in a naturally extended state, storing a sufficient amount of lubricant.

[0030] Furthermore, the lubrication mechanism 3 of this magnetic pump adopts vibration-triggered automatic lubrication, which can accurately match the actual working state of the magnetic pump compared with the traditional manual timed lubrication method. When the external force generated by the vibration or operation of the rotating shaft 22 acts on the force-bearing cover 36, it drives the moving rod 35 to squeeze the elastic oil bladder 32 upward, automatically starting the lubrication process, avoiding dry friction due to untimely lubrication, and improving operational reliability.

[0031] As a further improvement of this utility model, a recycling mechanism 4 is provided on the outer side of the base 1. The recycling mechanism 4 includes a liquid storage tank 41, a pump 42 is fixedly connected to the outer side of the liquid storage tank 41, an inlet pipe 43 is fixedly connected to the outer side of the pump 42, and a return pipe 44 is fixedly connected to the outer side of the pump 42.

[0032] Furthermore: the liquid storage tank 41 is fixedly connected to the outside of the base 1, and the liquid storage tank 41 is located below the rotating shaft 22. The liquid inlet pipe 43 is fixedly connected to the inside of the liquid storage tank 41. The end of the return pipe 44 away from the pump 42 is fixedly connected to the inside of the elastic oil bladder 32, and a one-way valve is fixedly connected inside the return pipe 44.

[0033] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0034] Working principle: When the magnetic pump is running, the rotating shaft 22 vibrates, or other external forces generated during the operation of the magnetic pump are transmitted to the force-bearing cover 36. The force-bearing cover 36 drives the moving rod 35 to move upward, compressing the return spring 37. The top of the moving rod 35 squeezes the elastic oil bladder 32, causing the elastic oil bladder 32 to deform and the internal pressure to increase. Lubricant is sprayed onto the surface of the rotating shaft 22 through the oil outlet pipes 38 symmetrically distributed on its outer side and the oil spray cover 39, lubricating the rotating shaft 22 and its connecting parts, reducing friction, and preventing dry friction. When the external force disappears, the return spring 37 returns to its elastic deformation, pushing the moving rod 35 downward, and the elastic oil bladder 32 returns to its original shape. Lubricant is replenished through the oil inlet pipe 34, preparing for the next lubrication, forming an automatic lubrication cycle.

[0035] During the operation of the lubrication mechanism 3, lubricant dripping from the surface of the rotating shaft 22 falls into the reservoir 41 located outside the base 1 and below the rotating shaft 22, completing the initial collection of lubricant. The extraction pump 42 outside the reservoir 41 is activated, extracting the lubricant from the reservoir 41 through the inlet pipe 43. The extracted lubricant is transported back into the elastic oil bladder 32 through the return pipe 44. Since a one-way valve is installed in the return pipe 44, it ensures that the lubricant can only flow in one direction, preventing backflow of lubricant during the return process, and ensuring that the recovered lubricant smoothly enters the elastic oil bladder 32, realizing the recycling of lubricant.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrosion resistant dry running magnetic pump comprising a base (1) characterised in that: The top of the base (1) is fixedly connected with a magnetic force pump body (2), the outer side of the top of the magnetic force pump body (2) is provided with a liquid guide pipe (21), the output end of the magnetic force pump body (2) is fixedly connected with a rotating shaft (22), and the outer side of the magnetic force pump body (2) is provided with a lubricating mechanism (3). The lubricating mechanism (3) comprises a lubricant tank (31), the inside of the lubricant tank (31) is mounted with an elastic oil bag (32), the top of the lubricant tank (31) is clamped with a cover plate (33), the top of the elastic oil bag (32) is fixedly connected with an oil inlet pipe (34), the bottom of the lubricant tank (31) is movably connected with a moving rod (35), the bottom of the moving rod (35) is fixedly connected with a stress cover (36), the moving rod (35) is fixedly connected with a return spring (37), the outer side of the elastic oil bag (32) is fixedly connected with an oil outlet pipe (38), and the outer side of the oil outlet pipe (38) is fixedly connected with an oil injection cover (39).

2. A corrosion resistant dry ground abrasive resistant magnetic drive pump in accordance with claim 1 wherein: The outer side of the base (1) is provided with a recovery mechanism (4), the recovery mechanism (4) comprises a liquid storage tank (41), the outer side of the liquid storage tank (41) is fixedly connected with a suction pump (42), the outer side of the suction pump (42) is fixedly connected with a liquid inlet pipe (43), and the outer side of the suction pump (42) is fixedly connected with a return pipe (44).

3. A corrosion resistant dry ground abrasive resistant magnetic drive pump in accordance with claim 1 wherein: The lubricant tank (31) is fixedly connected to the outer side of the top of the magnetic force pump body (2), and the top of the oil inlet pipe (34) is fixedly connected to the connection between the cover plate (33) and the lubricant tank (31).

4. A corrosion resistant dry running magnetic drive pump according to claim 1 wherein: The moving rod (35) is movably connected in the inside of the lubricant tank (31) through the return spring (37), and the top of the moving rod (35) is located outside the elastic oil bag (32).

5. A corrosion resistant dry running magnetic drive pump according to claim 1 wherein: The oil outlet pipes (38) are symmetrically distributed outside the elastic oil bag (32), and the oil injection cover (39) is fixedly connected to the outer side of the rotating shaft (22) through the oil outlet pipes (38).

6. A corrosion resistant dry ground abrasive resistant magnetic drive pump in accordance with claim 2 wherein: The liquid storage tank (41) is fixedly connected to the outer side of the base (1), and the liquid storage tank (41) is located below the rotating shaft (22).

7. A corrosion resistant dry ground abrasive resistant magnetic drive pump in accordance with claim 2 wherein: The liquid inlet pipe (43) is fixedly connected in the inside of the liquid storage tank (41), one end of the return pipe (44) away from the suction pump (42) is fixedly connected in the inside of the elastic oil bag (32), and a one-way valve is fixedly connected in the inside of the return pipe (44).

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