Immersed pump and conveying system

Abstract

The embodiment of the utility model provides an immersed pump and a conveying system, and relates to the technical field of pump well equipment. The immersed pump comprises a pump body, a power mechanism, an impeller and a bottom valve. The pump body is provided with a liquid inlet and a liquid outlet, a butt joint sleeve is arranged at the liquid inlet and comprises an unlocking part and an abutting part, and the unlocking part is sleeved with the abutting part; the power mechanism is arranged on the pump body; the impeller is connected with the power mechanism and is rotationally arranged in the pump body; the bottom valve is used for being arranged in a liquid storage tank, and a guide part is arranged at a valve element of the bottom valve. The guide part is configured to guide the unlocking part to open the valve element of the bottom valve and abut against the abutting part for sealing. And by arranging the butt joint sleeve and the guide part, rapid butt joint sealing of the pump body and the bottom valve can be achieved.

Description

Technical Field

[0001] This application relates to the field of pump well equipment technology, and in particular to a submersible pump and a delivery system. Background Technology

[0002] A submersible pump is a type of pump that can be completely immersed in a liquid. It works by directly driving the pump impeller through a drive mechanism, using the pressure difference of the water pump to discharge the liquid from the storage tank through the submersible pump.

[0003] In related technologies, a submersible pump includes a pump body and a bottom valve. The bottom valve is usually installed inside a storage tank. The pump body enters the storage tank and works in conjunction with the bottom valve. The bottom valve can prevent the liquid in the pump body from flowing back into the storage tank, thereby protecting the pump body.

[0004] However, since the bottom valve is usually installed at the bottom of the pump barrel, and due to factors such as the free movement of the pump body or changes in the well liquid level, the pump body needs to be operated multiple times through the lifting mechanism to align and cooperate with the bottom valve, which is time-consuming and labor-intensive. Utility Model Content

[0005] This application provides a submersible pump and a delivery system to solve the problem that the pump body needs to be operated multiple times through a lifting mechanism to align and cooperate with the bottom valve, which is time-consuming and labor-intensive.

[0006] In a first aspect, an embodiment of this application provides a submersible pump, comprising:

[0007] The pump body has an inlet and an outlet. A docking sleeve is provided at the inlet. The docking sleeve includes an unlocking part and an abutting part. The abutting part is sleeved on the outside of the unlocking part.

[0008] The power mechanism is located on the pump body;

[0009] The impeller is connected to the power mechanism and is rotatably mounted in the pump body. The impeller is configured to rotate under the action of the power mechanism so that the liquid in the storage tank flows from the inlet to the outlet.

[0010] A bottom valve is installed inside the liquid storage tank, and a guide part is provided at the valve core of the bottom valve;

[0011] The guide is configured to guide the unlocking part to open the valve core of the bottom valve and to abut and seal with the abutment part.

[0012] In some possible implementations, the submersible pump provided in this application embodiment has a first arc-shaped guide surface on the side of the guide portion facing the abutment portion, and a second arc-shaped guide surface on the side of the abutment portion facing the guide portion, with the first arc-shaped guide surface and the second arc-shaped guide surface being provided correspondingly.

[0013] In some possible implementations, the submersible pump provided in this application embodiment has a guide portion surrounding the valve core of the bottom valve, and the cross-sectional area of ​​the guide portion is larger than the cross-sectional area of ​​the unlocking portion;

[0014] The unlocking part can extend into the guide part and abut against the valve core of the bottom valve.

[0015] In some possible implementations, the submersible pump provided in this application embodiment has a first limiting member provided on the inner side of the guide portion and a second limiting member provided on the outer side of the unlocking portion;

[0016] The first limiting member is configured to connect and cooperate with the second limiting member to restrict the rotation of the pump body relative to the foot valve.

[0017] In some possible implementations, the submersible pump provided in this application embodiment has either a limiting protrusion or a limiting groove in the first limiting member and the second limiting member.

[0018] In some possible implementations, the submersible pump provided in this application embodiment has a detection element provided on at least one of the abutment portion and the guide portion, the detection element being used to detect whether the abutment portion and the guide portion are in abutting and sealing.

[0019] In some possible implementations, the submersible pump provided in this application embodiment also includes a vibration detection element;

[0020] Vibration detection components are installed on the power mechanism to detect the vibration frequency of the power mechanism.

[0021] In some possible implementations, the submersible pump provided in this application embodiment has a power mechanism including a housing, a permanent magnet stator, a permanent magnet rotor, and a rotating shaft;

[0022] The rotating shaft is rotatably housed inside the outer casing, with part of the shaft extending into the pump body and connected to the impeller.

[0023] The permanent magnet stator is housed inside the housing, and the permanent magnet stator surrounds and forms a rotor mounting position. The permanent magnet rotor is mounted on the rotating shaft and is located within the rotor mounting position.

[0024] The permanent magnet rotor is configured to rotate relative to the permanent magnet stator under the action of the permanent magnet stator, thereby driving the shaft to rotate.

[0025] In some possible implementations, the submersible pump provided in this application embodiment has a stator shielding sleeve on the outside of the permanent magnet stator and a rotor shielding sleeve on the outside of the permanent magnet rotor.

[0026] Both the stator shielding sleeve and the rotor shielding sleeve are Hastelloy alloy parts.

[0027] Secondly, an embodiment of this application provides a delivery system including a pump cylinder, a lifting mechanism, and the aforementioned submersible pump;

[0028] The pump barrel is used to be installed inside the storage tank. The pump barrel has a material outlet, and the bottom valve of the submersible pump is located at the end of the pump barrel away from the material outlet.

[0029] Both the lifting mechanism and the pump body of the submersible pump are located inside the pump barrel. The lifting mechanism is connected to the pump body of the submersible pump to drive the pump body to move along the extension direction of the pump barrel.

[0030] This utility model provides a submersible pump and a delivery system. The submersible pump includes a pump body, a power mechanism, an impeller, and a foot valve. The pump body has an inlet and an outlet. A docking sleeve is provided at the inlet, and the docking sleeve includes an unlocking part and an abutment part, with the abutment part sleeved outside the unlocking part. The power mechanism is mounted on the pump body. The impeller is connected to the power mechanism and rotatably mounted within the pump body. The foot valve is installed inside a storage tank, and a guide part is provided at the valve core of the foot valve. The guide part is configured to guide the unlocking part to open the valve core of the foot valve and abut against the abutment part for sealing. By providing the docking sleeve and the guide part, rapid docking and sealing between the pump body and the foot valve can be achieved. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0032] Figure 1 This is a schematic diagram of the structure of the conveying system provided in the embodiments of this application;

[0033] Figure 2 for Figure 1 A cross-sectional view of the submersible pump in the delivery system provided in the embodiments of this application;

[0034] Figure 3 for Figure 2 The enlarged view indicated by point A in the middle.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10. Submersible pump;

[0037] 100. Pump body;

[0038] 110. Liquid inlet;

[0039] 120. Liquid outlet;

[0040] 130. Connecting sleeve;

[0041] 131. Unlocking section;

[0042] 132. Contact part;

[0043] 200. Power mechanism;

[0044] 210. Outer shell;

[0045] 220. Permanent magnet stator;

[0046] 230. Permanent magnet rotor;

[0047] 240. Shaft;

[0048] 250. Vibration testing components;

[0049] 260. Bearing components;

[0050] 270. Wear detection components;

[0051] 300. Impeller;

[0052] 400, bottom valve;

[0053] 410. Guiding section;

[0054] 500. Induced wheel;

[0055] 600. Balancing mechanism;

[0056] 20. Pump cylinder; 201. Material outlet; 30. Lifting mechanism; 40. Liquid storage tank.

[0057] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0058] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0059] The terms “first,” “second,” “third,” and “fourth,” etc. (if present), in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0060] As mentioned in the background section, in related technologies, a bottom valve is usually installed inside the storage tank. The submersible pump enters the storage tank and works with the bottom valve. The bottom valve can prevent the liquid in the submersible pump from flowing back into the storage tank, thereby protecting the submersible pump.

[0061] However, since the bottom valve is usually installed at the bottom of the pump barrel, it is difficult to ensure that the submersible pump can accurately dock with the bottom valve every time due to factors such as the free movement of the submersible pump or changes in the well level.

[0062] To address the aforementioned problems in the existing technology, this utility model provides a submersible pump and a delivery system. The submersible pump includes a pump body, a power mechanism, an impeller, and a foot valve. The pump body has an inlet and an outlet. A docking sleeve is provided at the inlet, and the docking sleeve includes an unlocking part and an abutment part, with the abutment part fitted outside the unlocking part. The power mechanism is mounted on the pump body. The impeller is connected to the power mechanism and rotatably mounted within the pump body. The foot valve is installed inside a storage tank, and a guide part is provided at the valve core of the foot valve. The guide part is configured to guide the unlocking part to open the valve core of the foot valve and abut against the abutment part for sealing. By providing the docking sleeve and the guide part, rapid docking and sealing between the pump body and the foot valve can be achieved.

[0063] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0064] Reference Figure 2 and Figure 3 As shown in the embodiment of this application, a submersible pump 10 includes a pump body 100, a power mechanism 200, an impeller 300, and a bottom valve 400.

[0065] The pump body 100 has an inlet 110 and an outlet 120. A docking sleeve 130 is provided at the inlet 110. The docking sleeve 130 includes an unlocking part 131 and an abutting part 132. The abutting part 132 is sleeved on the outside of the unlocking part 131.

[0066] The impeller 300 is connected to the power mechanism 200 and is rotatably installed inside the pump body 100. The impeller 300 is configured to rotate under the action of the power mechanism 200 so that the liquid in the storage tank 40 flows from the inlet 110 to the outlet 120.

[0067] The bottom valve 400 is installed inside the liquid storage tank 40, and the valve core of the bottom valve 400 is provided with a guide part 410.

[0068] The guide part 410 is configured to guide the unlocking part 131 to open the valve core of the bottom valve 400 and to abut and seal with the abutment part 132.

[0069] It is understood that the submersible pump 10 provided in this application embodiment can be used in a conveying system to transport liquid materials in a storage tank 40. The conveying system includes a pump cylinder 20 and a lifting mechanism 30. The pump cylinder 20 is disposed inside the storage tank 40, and the material outlet 201 on the pump cylinder 20 is exposed outside the storage tank 40. The bottom valve 400 of the submersible pump 10 is disposed at the end of the pump cylinder 20 away from the material outlet 201. Both the lifting mechanism 30 and the pump body 100 of the submersible pump 10 are disposed inside the pump cylinder 20. The pump body 100 can slide within the pump cylinder 20 under the action of the lifting mechanism 30, thereby engaging with the bottom valve 400, and opening the valve core of the bottom valve 400 by the weight of the pump body 100 itself. After docking, the impeller 300 can rotate under the action of the power mechanism 200, so that the liquid in the storage tank 40 flows sequentially through the bottom valve 400, the inlet 110, and the outlet 120 into the pump cylinder 20, and is finally transported to the outside of the storage tank 40 by the material outlet 201 on the pump cylinder 20.

[0070] Among them, reference Figure 2 and Figure 3 As shown, a docking sleeve 130 is provided at the liquid inlet 110 of the pump body 100, and a guide part 410 is provided on the bottom valve 400. The guide part 410 can guide the unlocking part 131 of the docking sleeve 130 to open the valve core of the bottom valve 400, thereby ensuring the precise docking between the liquid inlet 110 of the pump body 100 and the bottom valve 400, thus avoiding the problem of complicated docking process between the pump body 100 and the bottom valve 400.

[0071] The contact part 132 is mainly used to contact and seal with the guide part 410 to seal the pump body 100 and the bottom valve 400 to prevent liquid material leakage.

[0072] The submersible pump 10 provided in this application embodiment can achieve rapid docking and sealing between the pump body 100 and the bottom valve 400 by setting the docking sleeve 130 and the guide part 410.

[0073] The bottom valve 400 may include a valve body, a valve core disposed inside the valve body, and an elastic reset assembly. The valve core is connected to the elastic reset assembly. When the pump body 100 is docked with the bottom valve 400, the pump body 100 uses its own weight to push open the valve core through the unlocking part 131, thereby connecting the inlet 110 of the pump body 100 to the valve body. When the pump body 100 moves away from the bottom valve 400 under the action of the lifting mechanism 30, the valve core resets under the action of the elastic reset assembly and closes the valve body.

[0074] In some embodiments, the guide portion 410 has a first arcuate guide surface on the side facing the abutment portion 132, and the abutment portion 132 has a second arcuate guide surface on the side facing the guide portion 410, with the first arcuate guide surface and the second arcuate guide surface being disposed correspondingly.

[0075] In the above embodiments, the first arc-shaped guide surface and the second arc-shaped guide surface have mutually adapted arc curvatures, making it easier for the guide portion 410 and the abutment portion 132 to be positioned and sealed during mating, thereby reducing friction. Furthermore, the first arc-shaped guide surface and the second arc-shaped guide surface cooperate with each other, enabling them to form a tight sealing surface upon contact, preventing leakage of liquid materials.

[0076] In some embodiments, the guide portion 410 surrounds the valve core of the bottom valve 400, and the cross-sectional area of ​​the guide portion 410 is larger than the cross-sectional area of ​​the unlocking portion 131.

[0077] The unlocking part 131 can extend into the guide part 410 and abut against the valve core of the bottom valve 400.

[0078] In the above embodiment, the unlocking part 131 can enter the guide part 410 under the action of the first arc-shaped guide surface of the guide part 410 and abut against the valve core of the bottom valve 400. Then, relying on the weight of the pump body 100 itself, the unlocking part 131 opens the valve core of the bottom valve 400, thereby connecting the unlocking part 131 with the liquid inlet 110 of the pump body 100.

[0079] In the example type, the unlocking part 131 can be cylindrical, and the guide part 410 can be a frustum shape with a gradually decreasing cross-sectional area, wherein the minimum cross-sectional area of ​​the guide part 410 is greater than the cross-sectional area of ​​the unlocking part 131.

[0080] In some specific embodiments, a first limiting member is provided on the inner side of the guide portion 410, and a second limiting member is provided on the outer side of the unlocking portion 131.

[0081] The first limiting member is configured to connect and cooperate with the second limiting member to restrict the rotation of the pump body 100 relative to the foot valve 400.

[0082] In the above embodiment, after the docking sleeve 130 docks with the guide part 410, the first limiting member is simultaneously connected and cooperated with the second limiting member to restrict the pump body 100 from rotating and shaking relative to the bottom valve 400, so as to ensure the stability of the submersible pump 10 during the process of conveying liquid materials.

[0083] For example, the first limiting member and the second limiting member can be a card slot block structure.

[0084] In some specific embodiments, either the first limiting member or the second limiting member is a limiting protrusion, and the other is a limiting groove.

[0085] In the above embodiment, when the docking sleeve 130 docks with the guide part 410, the limiting protrusion extends into the limiting groove to restrict the relative movement between the docking sleeve 130 and the guide part 410.

[0086] It is understood that the first limiting member can be a limiting protrusion, and the second limiting member can be a limiting groove. Of course, in some other embodiments, the first limiting member can be a limiting groove, and the second limiting member can be a limiting protrusion. This application does not impose too many restrictions on this.

[0087] In some embodiments, at least one of the abutting portion 132 and the guide portion 410 is provided with a detection element, which is used to detect whether the abutting portion 132 and the guide portion 410 are abutting and sealing.

[0088] In the above embodiment, by setting a detection element, it is detected whether the abutment part 132 and the guide part 410 abut and seal, so as to ensure the accuracy of the docking between the pump body 100 and the bottom valve 400.

[0089] For example, the detection component can be a proximity displacement probe used to detect the distance between the mating sleeve 130 and the guide portion 410. The proximity displacement probe can be electrically connected to an external control module. The control module can preset a safe distance range. When the distance between the mating portion 132 and the guide portion 410 is within this safe distance range, a relative seal and a stable working state can be achieved between the two.

[0090] When the pump body 100 and the foot valve 400 are docked, if the proximity displacement probe detects that the distance between the contact part 132 and the guide part 410 is not within the safe distance range, the proximity displacement probe can issue a warning signal to avoid excessive contact between the contact part 132 and the guide part 410, which would result in excessive mechanical pressure, wear, or even damage to the components; or incomplete contact, which would affect the sealing performance and the normal conveying of liquid materials.

[0091] Of course, the detection element can also be a pressure-triggered sensor, and this application embodiment does not impose too many restrictions on this.

[0092] Reference Figure 2 As shown, in some embodiments, a vibration detection element 250 is also included.

[0093] Vibration detection element 250 is mounted on power mechanism 200 to detect the vibration frequency of power mechanism 200.

[0094] In the above embodiment, by setting a vibration detection element 250 on the power mechanism 200, the vibration frequency of the power mechanism 200 is detected, and the operating condition of the submersible pump 10 is remotely detected, so as to avoid the submersible pump 10 from overload, underload, stall, dry running, phase loss and other situations.

[0095] The vibration detection component 250 can be electrically connected to an external control module. The control module can preset a safe vibration range. When the vibration detection component 250 detects that the vibration frequency of the housing 210 of the power mechanism 200 exceeds the safe vibration range, the vibration detection component 250 can issue an early warning signal in a timely manner so that the operator can take necessary measures.

[0096] For example, the vibration detection element 250 can be a vibration accelerometer of conventional technology.

[0097] Reference Figure 2 As shown, in some embodiments, the power mechanism 200 includes a housing 210, a permanent magnet stator 220, a permanent magnet rotor 230, and a shaft 240.

[0098] The rotating shaft 240 is rotatably mounted inside the housing 210, with a portion of the rotating shaft 240 extending into the pump body 100 and connected to the impeller 300. The permanent magnet stator 220 is mounted inside the housing 210, forming a rotor mounting position. The permanent magnet rotor 230 is mounted on the rotating shaft 240 and is located within the rotor mounting position.

[0099] The permanent magnet rotor 230 is configured to rotate relative to the permanent magnet stator 220 under the action of the permanent magnet stator 220, so as to drive the rotating shaft 240 to rotate.

[0100] In the above embodiment, the power structure uses a permanent magnet motor, which is about half the size of a conventional motor, thus reducing the size of the pump cylinder 20 and lowering costs. The permanent magnet motor has high speed and a wide, efficient speed range, making it well-suited for operating conditions requiring frequent adjustments to flow rate and head. The vibration detection element 250 can be mounted on the housing 210.

[0101] Understandably, the permanent magnet stator 220 includes a stator core and coil windings. The stator core is circumferentially disposed on the inner wall of the outer casing 210, and the coil windings are wound on the stator core. The permanent magnet rotor 230 includes a rotor core and permanent magnets. The rotor core is circumferentially disposed on the outer wall of the rotating shaft 240, and the permanent magnets are disposed on the rotor core.

[0102] The outer casing 210 has a cable insertion hole, through which the coil winding can be led out of the outer casing 210 and electrically connected to the external control module. A silicone ring or other sealing material is provided at the location of the cable insertion hole.

[0103] In some embodiments, a stator shielding sleeve is provided on the outside of the permanent magnet stator 220, and a rotor shielding sleeve is provided on the outside of the permanent magnet rotor 230.

[0104] In the above embodiments, the permanent magnet stator 220 and the permanent magnet rotor 230 can be immersed in liquid material to work. The permanent magnet stator 220 and the permanent magnet rotor 230 are separated from the liquid material by the stator shield and the rotor shield, thereby preventing the permanent magnet stator 220 and the permanent magnet rotor 230 from being corroded by the liquid material.

[0105] This expands the application range of the submersible pump 10, especially when handling corrosive liquids such as liquid ammonia. Liquid ammonia differs from other cryogenic liquids (LNG or olefins) in that it is corrosive, particularly to copper and copper alloys; furthermore, liquid ammonia reacts chemically with copper to form copper amide (complexes) or copper nitride, which can easily lead to explosions. Conventional cryogenic submersible pump motors, including the coils, are immersed in the liquid, which does not solve these problems.

[0106] By sealing the stator and rotor with stator and rotor shielding sleeves, complete corrosion protection is achieved, allowing power to be smoothly transmitted to the rotor via the magnetic field. The entire rotor operates in the pumped liquid. The ends of the stator and rotor shielding sleeves are welded to them with corrosion-resistant metal plates, thus separating them from the liquid ammonia and preventing corrosion of the electrons and rotor. This effectively ensures that there is no direct contact between the liquid ammonia and the components of the permanent magnet motor.

[0107] In some specific embodiments, both the stator shielding sleeve and the rotor shielding sleeve are Hastelloy alloy parts.

[0108] In the above embodiments, Hastelloy alloy parts are mainly divided into two categories: nickel-chromium alloys and nickel-chromium-molybdenum alloys, which have good corrosion resistance.

[0109] Furthermore, Hastelloy components are generally non-magnetic, so Hastelloy will not be attracted or exhibit significant magnetic characteristics in the magnetic field between the permanent magnet stator 220 and the permanent magnet rotor 230, thereby avoiding affecting the operation of the permanent magnet motor.

[0110] Reference Figure 2 As shown, in some embodiments, the power mechanism 200 further includes at least one bearing member 260.

[0111] The outer ring of the bearing component 260 is disposed inside the housing 210, and the rotating shaft 240 is disposed inside the inner ring of the bearing component 260.

[0112] In the above embodiment, the bearing 260 supports the rotating shaft 240 and ensures its smooth rotation. The rotation of the bearing 260 reduces direct friction between the rotating shaft 240 and the motor housing 210, thereby reducing wear and energy loss.

[0113] The bearing component 260 can be self-lubricated by the liquid material in the storage tank 40 to reduce resistance. The bearing component 260 can be made of high-purity silicon carbide sintered without pressure.

[0114] For example, bearing component 260 may include, but is not limited to, sliding bearings and thrust bearings.

[0115] Reference Figure 2 As shown, in some specific embodiments, the power mechanism 200 also includes a wear detection element 270 disposed within the housing 210 to detect the degree of wear of the bearing element 260.

[0116] In the above embodiment, the wear detection element 270 can be electrically connected to an external control module. The wear detection element 270 detects axial and radial wear of the bearing component 260 and sends signals to the external control module, allowing operators to remotely monitor the operating status of the submersible pump 10. When the wear detection element 270 detects abnormal wear of the bearing component 260, it can send a warning signal to the external control module, allowing operators to shut down the submersible pump 10 in abnormal situations.

[0117] The wear detection component 270 can be a bearing axial wear detection device or a bearing radial wear detection device in conventional technology. For example, the bearing radial wear detection device has an axial displacement monitor, which can be installed on the housing 210. The axial displacement voltage signal of the rotating shaft 240 is obtained according to the principle of electromagnetic eddy current, the signal is amplified and digitally calculated, and then sent to an external control module.

[0118] Both wear detection devices are equipped with standard external output ports for electrical connection to external control modules.

[0119] Reference Figure 2 and Figure 3 As shown, in some embodiments, a rotating induction wheel 500 is provided at the liquid inlet 110 of the pump body 100.

[0120] In the above implementation, the inducer 500 guides the liquid flow, allowing the liquid material to enter the pump body 100 in a more stable and uniform manner, reducing flow losses at the inlet 110, preventing cavitation, and extending the service life of the submersible pump 10. Furthermore, the inducer 500 also lowers the minimum working liquid level of the storage tank 40, increasing its effective working volume.

[0121] Reference Figure 2 and Figure 3 As shown, in some embodiments, a balancing mechanism 600 is provided inside the pump body 100, and the balancing mechanism 600 is connected to the rotating shaft 240. The balancing mechanism 600 includes a balancing disc and a balancing drum.

[0122] In the above embodiment, during the rotation of the shaft 240, the axial force of the shaft 240 and the thrust bearing can be balanced by the rotation of the balance disc and the balance drum, so as to ensure the stability of the operation of the submersible pump 10.

[0123] Reference Figure 1 As shown in the embodiment of this application, a conveying system includes a pump cylinder 20, a lifting mechanism 30, and a submersible pump 10 as described above.

[0124] The pump barrel 20 is installed inside the storage tank 40. The pump barrel 20 has a material outlet 201. The bottom valve 400 of the submersible pump 10 is located at the end of the pump barrel 20 away from the material outlet 201.

[0125] The lifting mechanism 30 and the pump body 100 of the submersible pump 10 are both disposed inside the pump barrel 20. The lifting mechanism 30 is connected to the pump body 100 of the submersible pump 10 to drive the pump body 100 to move along the extension direction of the pump barrel 20.

[0126] In this embodiment, since the delivery system uses the submersible pump 10 in the above embodiment, it also has the advantages and benefits brought by the submersible pump 10, namely, it can achieve accurate docking between the pump body 100 and the bottom valve 400.

[0127] Among them, reference Figure 1 As shown, the lifting mechanism 30 can be a hoisting rope assembly.

[0128] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0129] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A submerged liquid pump, characterized by The utility model relates to a pump body (100) have liquid inlet (110) and liquid outlet (120), liquid inlet (110) department is provided with butt joint sleeve (130) at, butt joint sleeve (130) includes unlocking portion (131) and abutment portion (132), abutment portion (132) is set up in unlocking portion (131) outside, Power mechanism (200) is arranged on the pump body (100), Impeller (300) is connected with power mechanism (200) and is rotationally arranged in the pump body (100), impeller (300) is configured to rotate under the action of power mechanism (200) to make the liquid in the liquid storage tank (40) flow from liquid inlet (110) to liquid outlet (120), Bottom valve (400) is used to be arranged in the liquid storage tank (40), and a guide portion (410) is arranged at the valve core of the bottom valve (400), The guide portion is configured to guide the unlocking portion (131) to open the valve core of the bottom valve (400) and abut and seal with the abutment portion (132). The side of the guide portion (410) towards the abutment portion (132) has a first arc-shaped guide surface, and the side of the abutment portion (132) towards the guide portion (410) has a second arc-shaped guide surface, and the first arc-shaped guide surface and the second arc-shaped guide surface are correspondingly arranged.

2. The submerged liquid pump according to claim 1, characterized in that The guide portion (410) is arranged around the valve core of the bottom valve (400), and the cross-sectional area of the guide portion (410) is greater than the cross-sectional area of the unlocking portion (131).

3. The liquid submersible pump of claim 2, wherein, The unlocking portion (131) can extend into the guide portion (410) and abut with the valve core of the bottom valve (400). The inner side of the guide portion (410) is provided with a first limiting piece, and the outer side of the unlocking portion (131) is provided with a second limiting piece; 4. The submerged pump according to claim 3, characterized in that The first limiting piece is configured to be connected and matched with the second limiting piece to limit the rotation of the pump body (100) relative to the bottom valve (400). Either one of the first limiting piece and the second limiting piece is a limiting protrusion, and the other is a limiting groove.

5. The submerged liquid pump according to claim 4, characterized in that The detection piece is arranged on at least one of the abutment portion (132) and the guide portion (410), and is used to detect whether the abutment portion (132) and the guide portion (410) abut and seal.

6. The liquid submersible pump according to any one of claims 1 to 5, characterized in that Further comprising a vibration detection piece (250); 7. The liquid submersible pump according to any one of claims 1 to 5, characterized in that The vibration detection piece (250) is arranged on the power mechanism (200) to detect the vibration frequency of the power mechanism (200). The power mechanism (200) comprises a housing (210), a permanent magnet stator (220), a permanent magnet rotor (230) and a rotating shaft (240); 8. The liquid submersible pump according to any one of claims 1 to 5, characterized in that The rotating shaft (240) is rotationally arranged in the housing (210), and part of the rotating shaft (240) extends into the pump body (100) and is connected with the impeller (300); ​ The permanent magnet stator (220) is arranged in the shell (210), the permanent magnet stator (220) is surrounded to form a rotor mounting position, the permanent magnet rotor (230) is arranged on the rotating shaft (240), and the permanent magnet rotor (230) is arranged in the rotor mounting position; The permanent magnet rotor (230) is configured to rotate relative to the permanent magnet stator (220) under the action of the permanent magnet stator (220) to drive the rotating shaft (240) to rotate.

9. The liquid submersible pump of claim 8, wherein, The permanent magnet stator (220) is arranged outside the stator shielding sleeve, and the permanent magnet rotor (230) is arranged outside the rotor shielding sleeve; The stator shielding sleeve and the rotor shielding sleeve are both Hastelloy parts.

10. A delivery system characterized by, The pump (10) according to any one of claims 1 to 9, a pump cylinder (20), and a lifting mechanism (30); The pump cylinder (20) is arranged in the liquid storage tank (40), the pump cylinder (20) has a material outlet (201), and the bottom valve (400) of the submersible pump (10) is arranged at one end of the pump cylinder (20) away from the material outlet (201); The lifting mechanism (30) and the pump body (100) of the submersible pump (10) are both arranged in the pump cylinder (20), and the lifting mechanism (30) is connected with the pump body (100) of the submersible pump (10) to drive the pump body (100) to move along the extension direction of the pump cylinder (20).

Images