Pump shell sealing mechanism of centrifugal pump

Abstract

The invention is suitable for the technical field of centrifugal pumps, and provides a centrifugal pump shell sealing mechanism which comprises a base, the upper end of the base is detachably and fixedly connected with a centrifugal pump body, and the centrifugal pump body comprises a driving motor, a first pump shell and a second pump shell; a rotating shaft is arranged on the side, close to the first pump shell, of the driving motor, and a protection assembly is arranged between the first pump shell and the driving motor. The protection assembly comprises protection covers arranged at the upper end and the lower end of the rotating shaft, by arranging the protection assembly, secondary sealing can be conveniently conducted on the joint of the rotating shaft and the first pump shell, when the sealing between the rotating shaft and the first pump shell is damaged and leaks, water sprayed by water is limited in the protection covers through the protection covers, and water flow is detected through a water flow sensor. And in case of water leakage, the controller controls the alarm to give an alarm, so that the joint of the rotating shaft and the pump shell is convenient to maintain.

Description

Technical Field

[0001] The present invention belongs to the technical field of centrifugal pumps, and particularly relates to a sealing mechanism for a centrifugal pump casing. Background Art

[0002] A centrifugal pump transports fluid by the centrifugal force generated when the impeller rotates. The fluid is sucked in from the water inlet on the pump casing, passes through the water pressure chamber, and is pumped out by the impeller from the water outlet. During operation, the pump shaft drives the impeller inside the pump casing to rotate at a high speed. Usually, both ends of the pump shaft extend out of the pump casing. One end passes through the bearing box and is connected to a power source to input torque, and the other end is connected to the bearing housing to serve as a rotational support.

[0003] The patent application with the reference number CN202310573513.0 discloses a sealed centrifugal pump device. An outlet and an inlet are provided in the centrifugal pump casing. The impeller is placed inside the centrifugal pump casing. The motor assembly is located at the rear side of the centrifugal pump casing. The pump shaft is located between the centrifugal pump casing and the motor assembly. One end of the pump shaft passes through the through hole on the centrifugal pump casing and is connected to the impeller through a sealing installation mechanism, and the other end is fixedly connected to the output end of the motor assembly. Blades are fixedly connected to the impeller. A sealing circular plate is arranged on the front side of the pump shaft. The sealing circular plate is fixedly connected to the pump shaft through bolts. An annular sealing groove for placing a sealing ring is provided at the front end of the impeller. The sealing ring and the sealing circular plate are fixedly connected. A clamping groove for placing a clamping block is provided at the rear end of the impeller. The clamping block is fixed on the pump shaft. An anti-corrosion layer and a metal wear-resistant sheet are sequentially arranged on the outer wall of the blade. The pump shaft and the impeller of the present invention are hermetically connected. The anti-corrosion layer and the metal wear-resistant sheet ensure a long service life of the blade, small water flow friction loss, and high working efficiency of the centrifugal pump.

[0004] The prior art still has the following deficiencies:

[0005] When leakage occurs between the pump shaft and the pump casing in the prior art, the water inside is sputtered outwards under the action of pressure, which not only affects the normal operation of the centrifugal pump, but also affects the surrounding environment, and emergency measures need to be taken by shutting down the machine, thus reducing the working efficiency of the centrifugal pump. Summary of the Invention

[0006] The present invention provides a sealing mechanism for a centrifugal pump casing, aiming to solve the problem that when leakage occurs between the pump shaft and the pump casing in the prior art, the water inside is sputtered outwards under the action of pressure, which not only affects the normal operation of the centrifugal pump, but also affects the surrounding environment, and emergency measures need to be taken by shutting down the machine, thus reducing the working efficiency of the centrifugal pump.

[0007] The present invention is implemented as follows. A centrifugal pump casing sealing mechanism includes: a base, the upper end of the base is detachably and fixedly connected with a centrifugal pump body, and the centrifugal pump body includes a driving motor, a first pump casing and a second pump casing; a rotating shaft is arranged on one side of the driving motor close to the first pump casing, and a protection component is arranged between the first pump casing and the driving motor; the protection component includes protective covers arranged at the upper and lower ends of the rotating shaft, wherein a water flow sensor is installed inside the protective cover close to the lower end, and an alarm is installed outside the protective cover close to the upper end.

[0008] Preferably, the protection component further includes that both ends of the mutually close sides of the two protective covers are respectively fixedly connected with first connecting plates; for every two of the four first connecting plates that are mutually close, they are detachably and fixedly connected by bolts and nuts, and rubber sealing strips are respectively arranged on the two protective covers close to the connection part of the four first connecting plates; return-shaped sealing grooves are respectively formed on one side of the first pump casing close to the protection component, and U-shaped sealing blocks are respectively fixedly connected to one side of the two protective covers close to the return-shaped sealing grooves.

[0009] Preferably, the protection component further includes that the two U-shaped sealing blocks are respectively inserted into the upper and lower ends of the return-shaped sealing grooves, and sealing gaskets are fixedly connected to one side of the interiors of the two protective covers close to the first pump casing.

[0010] Preferably, the protection component further includes arc-shaped grooves formed in the middle of the mutually close ends of the other sides of the two protective covers, arc-shaped rubber sleeves are respectively fixedly connected to the inner walls of the two arc-shaped grooves, and the two arc-shaped rubber sleeves are respectively in contact with the surface of the rotating shaft.

[0011] Preferably, a connection component is arranged at the connection part of the rotating shaft and the first pump casing. The connection component includes a round hole formed on one side of the first pump casing close to the driving motor, an installation groove is formed on the inner wall of the round hole, an extension end of the rotating shaft passes through the round hole and is fixedly connected with an installation plate, a sealing sleeve is sleeved on the rotating shaft, the sealing sleeve is located in the round hole, the installation plate is located inside the second pump casing, a connection seat is detachably and fixedly connected to the other side of the installation plate, an impeller is installed on the other side of the connection seat, a sealing rod is fixedly connected to one side of the installation plate close to the connection seat, a connection groove is formed on one side of the connection seat close to the sealing rod, and the sealing rod is inserted into the connection groove.

[0012] Preferably, the connection component further includes a connection ring rotatably connected inside the installation groove, a plurality of telescopic rods are respectively fixedly connected to the connection ring, the telescopic ends of the plurality of telescopic rods are respectively fixedly connected with elastic rubber blocks, and the plurality of elastic rubber blocks are respectively fixedly connected with the sealing sleeve.

[0013] Preferably, the connection component further includes an arc-shaped elastic sealing plate connected between several of the elastic rubber blocks, and guiding springs are sleeved on several of the telescopic rods.

[0014] Preferably, the connection component further includes two sealing rubber discs sleeved on the surface of the rotating shaft. The two sealing rubber discs are respectively located on the inner and outer sides of the first pump housing close to one side of the circular hole, and the two sealing rubber discs correspond to the circular hole.

[0015] Preferably, the connection component further includes circular sealing grooves opened on both sides of the inner part of the first pump housing close to one side of the circular hole. The circular hole is located between the two circular sealing grooves. One side of the two sealing rubber discs close to the two circular sealing grooves is fixedly connected with circular ring-shaped sealing columns, and the two circular ring-shaped sealing columns are respectively slidably connected with the two circular sealing grooves.

[0016] Preferably, on the four circumferences of the mutually approaching sides of the first pump housing and the second pump housing, there are respectively fixedly connected with U-shaped connection blocks. The two U-shaped connection blocks are detachably and fixedly connected by bolts and nuts. On the inner walls of the first pump housing and the second pump housing close to the two U-shaped connection blocks, there are respectively fixedly connected with corrosion-resistant sealing plates. On the upper end of the base close to one side of the two U-shaped connection blocks, there are grooves opened. The bottoms of the two U-shaped connection blocks are located inside the grooves. One side of the second pump housing is communicated with a water inlet pipe, and the top of the second pump housing is communicated with a water outlet pipe.

[0017] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0018] By providing a protection component, it is convenient to perform secondary sealing on the connection between the rotating shaft and the first pump housing. When the seal between the rotating shaft and the first pump housing is damaged and leaks, through the protective cover, the water sprayed is restricted inside the protective cover. Through the water flow sensor, it is convenient to detect whether there is water leakage. When water leakage occurs, the controller controls the alarm to alarm, which is convenient for repairing the connection between the rotating shaft and the pump housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 is a front structural schematic diagram of the present invention;

[0021] Figure 3 is a top structural schematic diagram of the present invention;

[0022] Figure 4 is a front sectional structural schematic diagram of the present invention;

[0023] Figure 5 is the present invention Figure 4Enlarged schematic diagram at position A in [the figure];

[0024] Figure 6 This is the present invention Figure 4 Enlarged schematic diagram at position B in [the figure];

[0025] Figure 7 This is the present invention Figure 4 Enlarged schematic diagram at position C in [the figure];

[0026] In the figure: 1, base; 2, centrifugal pump body; 3, driving motor; 4, first pump casing; 5, second pump casing; 6, water inlet pipe; 7, water outlet pipe; 8, connecting component; 9, protection component; 10, rotating shaft; 11, round hole; 12, sealing sleeve; 13, mounting groove; 14, elastic rubber block; 15, telescopic rod; 16, guiding spring; 17, sealing rubber disc; 18, circular sealing groove; 19, circular ring sealing column; 20, mounting plate; 21, connecting seat; 22, sealing rod; 23, connecting groove; 24, impeller; 25, protective cover; 26, U-shaped sealing block; 27, circular sealing groove; 28, alarm; 29, water flow sensor; 30, arc-shaped groove; 31, arc-shaped rubber sleeve; 32, first connecting plate; 33, circular connecting block; 34, corrosion-resistant sealing plate; 35, groove. Detailed implementation manners

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects and are not used to describe a specific order.

[0028] Referring to "embodiments" herein means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears at various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] An embodiment of the present invention provides a centrifugal pump casing sealing mechanism, as Figures 1-7As shown in the figure, it includes: a base 1, and a centrifugal pump body 2 is detachably and fixedly connected to the upper end of the base 1. The centrifugal pump body 2 includes a driving motor 3, a first pump casing 4, and a second pump casing 5; a rotating shaft 10 is arranged on one side of the driving motor 3 close to the first pump casing 4, and a protective component 9 is arranged between the first pump casing 4 and the driving motor 3; the protective component 9 includes protective covers 25 arranged at the upper and lower ends of the rotating shaft 10, wherein a water flow sensor 29, model MW-WS-S0, is installed inside the protective cover 25 close to the lower end, and an alarm 28 is installed outside the protective cover 25 close to the upper end.

[0030] It should be noted that when leakage occurs between the pump shaft and the pump casing in the prior art, the water inside is sputtered outward under the action of pressure, which not only affects the normal operation of the centrifugal pump, but also affects the surrounding environment. It is necessary to stop the machine and take emergency measures, thereby reducing the working efficiency of the centrifugal pump. In this solution, by setting the protective component 9, it is convenient to perform secondary sealing on the connection between the rotating shaft 10 and the first pump casing 4. When the seal between the rotating shaft 10 and the first pump casing 4 is damaged and leaks, through the protective cover 25, the water sprayed is restricted inside the protective cover 25. Through the water flow sensor 29, it is convenient to detect whether there is water leakage. When water leakage is encountered, the controller controls the alarm 28 to alarm, which is convenient for repairing the connection between the rotating shaft 10 and the pump casing.

[0031] It should be noted that the model specification MW-WS-S0 of the water flow sensor 29 is not the only limitation, but is selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0032] The power supply and principle of the water flow sensor 29 are clear to those skilled in the art and will not be elaborated in detail here.

[0033] In a further preferred embodiment of the present invention, as Figures 1-6 shown, the protective component 9 further includes first connecting plates 32 fixedly connected to both ends of the sides of the two protective covers 25 close to each other; among the four first connecting plates 32, every two first connecting plates 32 close to each other are detachably and fixedly connected by bolts and nuts, and rubber sealing strips are arranged on the two protective covers 25 close to the connection of the four first connecting plates 32; return-shaped sealing grooves 27 are respectively opened on one side of the first pump casing 4 close to the protective component 9, and U-shaped sealing blocks 26 are respectively fixedly connected to one side of the two protective covers 25 close to the return-shaped sealing grooves 27.

[0034] In this embodiment, it is convenient for connection and sealing.

[0035] In a further preferred embodiment of the present invention, as Figures 1-6As shown, the protection component 9 further includes two U-shaped sealing blocks 26 respectively inserted into the upper and lower ends of the loop-shaped sealing groove 27, and sealing gaskets are fixedly connected to the inner sides of the two protective covers 25 close to the first pump housing 4.

[0036] In this embodiment, it is convenient for sealed connection.

[0037] In a further preferred embodiment of the present invention, as Figures 1-4 shown, the protection component 9 further includes arc-shaped grooves 30 opened in the middle of the mutually close ends of the other sides of the two protective covers 25, arc-shaped rubber sleeves 31 are fixedly connected to the inner walls of the two arc-shaped grooves 30 respectively, and the two arc-shaped rubber sleeves 31 are respectively in contact with the surface of the rotating shaft 10.

[0038] In this embodiment, it is convenient for sealing.

[0039] In a further preferred embodiment of the present invention, as Figures 1-7 shown, a connection component 8 is provided at the connection between the rotating shaft 10 and the first pump housing 4. The connection component 8 includes a circular hole 11 opened on the first pump housing 4 close to the driving motor 3. An installation groove 13 is opened on the inner wall of the circular hole 11. The extended end of the rotating shaft 10 passes through the circular hole 11 and is fixedly connected with an installation plate 20. A sealing sleeve 12 is sleeved on the rotating shaft 10. The sealing sleeve 12 is located in the circular hole 11. The installation plate 20 is located inside the second pump housing 5. A connection seat 21 is detachably and fixedly connected to the other side of the installation plate 20. An impeller 24 is installed on the other side of the connection seat 21. A sealing rod 22 is fixedly connected to the side of the installation plate 20 close to the connection seat 21. A connection groove 23 is opened on the side of the connection seat 21 close to the sealing rod 22. The sealing rod 22 is inserted into the connection groove 23.

[0040] In this embodiment, it is convenient for connection.

[0041] In a further preferred embodiment of the present invention, as Figures 1-5 shown, the connection component 8 further includes a connection ring rotatably connected inside the installation groove 13. A plurality of telescopic rods 15 are respectively fixedly connected to the connection ring. The telescopic ends of the plurality of telescopic rods 15 are respectively fixedly connected with elastic rubber blocks 14. The plurality of elastic rubber blocks 14 are respectively fixedly connected with the sealing sleeve 12.

[0042] In this embodiment, it is convenient for connection and sealing.

[0043] In a further preferred embodiment of the present invention, as Figures 1-5 shown, the connection component 8 further includes an arc-shaped elastic sealing plate connected between the plurality of elastic rubber blocks 14, and guiding springs 16 are sleeved on the plurality of telescopic rods 15.

[0044] In this embodiment, it is convenient to adjust according to the wear degrees of the sealing sleeve 12 and the rotating shaft 10, so that the telescopic rod 15 and the guiding spring 16 always apply a force to the elastic rubber block 14, making the sealing sleeve 12 always fit with the rotating shaft 10. By providing the elastic rubber block 14, it is convenient to fit with the inner wall of the installation groove 13 and improve the sealing effect.

[0045] In a further preferred embodiment of the present invention, as Figures 1-5 shown, the connecting component 8 further includes two sealing rubber discs 17 sleeved on the surface of the rotating shaft 10. The two sealing rubber discs 17 are respectively located on the inner and outer sides of the first pump housing 4 close to the circular hole 11, and the two sealing rubber discs 17 are both corresponding to the circular hole 11.

[0046] In this embodiment, it is convenient to further improve the sealing effect.

[0047] In a further preferred embodiment of the present invention, as Figures 1-5 shown, the connecting component 8 further includes circular sealing grooves 18 opened on both inner sides of the first pump housing 4 close to the circular hole 11. The circular hole 11 is located between the two circular sealing grooves 18. One side of the two sealing rubber discs 17 close to the two circular sealing grooves 18 is fixedly connected with circular ring-shaped sealing columns 19, and the two circular ring-shaped sealing columns 19 are respectively slidably connected with the two circular sealing grooves 18.

[0048] In this embodiment, it is convenient for sealing.

[0049] In a further preferred embodiment of the present invention, as Figures 1-4 shown, on the four-week sides of the mutually close sides of the first pump housing 4 and the second pump housing 5 are respectively fixedly connected with U-shaped connecting blocks 33. The two U-shaped connecting blocks 33 are detachably and fixedly connected by bolts and nuts. On the inner walls of the first pump housing 4 and the second pump housing 5 close to the two U-shaped connecting blocks 33 are respectively fixedly connected with corrosion-resistant sealing plates 34. On the upper end of the base 1 close to the two U-shaped connecting blocks 33 is provided with a groove 35. The bottoms of the two U-shaped connecting blocks 33 are located inside the groove 35. One side of the second pump housing 5 is communicated with a water inlet pipe 6, and the top of the second pump housing 5 is communicated with a water outlet pipe 7.

[0050] In this embodiment, it is convenient for connection. When it is necessary to repair and replace the impeller 24, by disassembling the second pump housing 5, it is convenient for maintenance.

[0051] The electrical components mentioned in the text are all electrically connected to the controller and the power supply. The control mode of the present invention is controlled by the controller. The control circuit of the controller can be realized by simple programming of those skilled in the art. The provision of the power supply also belongs to the common knowledge in the art. And the present invention is mainly used to protect mechanical devices, so the control mode and the circuit connection of the present invention will not be further explained in detail.

[0052] It should be noted that, for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0053] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units can be divided in other ways during actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the shown or discussed coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0054] The units described as separate components above may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without creative work, combine, add, delete or make other adjustments to the features in the embodiments of the present invention according to the situation, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A centrifugal pump casing sealing mechanism, characterized in that: Including: A base, on the upper end of which a centrifugal pump body is detachably and fixedly connected. The centrifugal pump body includes a driving motor, a first pump casing and a second pump casing; A rotating shaft is arranged on one side of the driving motor close to the first pump casing, and a protection component is arranged between the first pump casing and the driving motor; The protection component includes protective covers arranged at the upper and lower ends of the rotating shaft. A water flow sensor is installed inside the protective cover close to the lower end, and an alarm is installed outside the protective cover close to the upper end.

2. A centrifugal pump casing sealing mechanism according to claim 1, characterized in that: The protection component further includes first connecting plates fixedly connected to both ends of the two protective covers close to each other on one side; Among the four first connecting plates, every two first connecting plates close to each other are detachably and fixedly connected by bolts and nuts. Rubber sealing strips are arranged on both sides of the two protective covers close to the connection of the four first connecting plates; U-shaped sealing blocks are fixedly connected to both sides of the two protective covers close to the first pump casing, and rectangular sealing grooves are respectively formed on one side of the first pump casing close to the protection component; 3. A centrifugal pump casing sealing mechanism as claimed in claim 2, characterized in that: The protection component further includes that the two U-shaped sealing blocks are respectively inserted into the upper and lower ends of the rectangular sealing grooves, and sealing gaskets are fixedly connected to one side of the two protective covers close to the first pump casing; 4. A centrifugal pump casing sealing mechanism as claimed in claim 3, characterized in that: The protection component further includes arc-shaped grooves formed in the middle of the other ends of the two protective covers close to each other on one side. Arc-shaped rubber sleeves are fixedly connected to the inner walls of the two arc-shaped grooves, and the two arc-shaped rubber sleeves are respectively in contact with the surface of the rotating shaft.

5. A centrifugal pump casing sealing mechanism according to claim 1, characterized in that: A connecting component is arranged at the connection between the rotating shaft and the first pump casing. The connecting component includes a circular hole formed in one side of the first pump casing close to the driving motor. An installation groove is formed in the inner wall of the circular hole. The extended end of the rotating shaft passes through the circular hole and is fixedly connected to an installation plate. A sealing sleeve is sleeved on the rotating shaft and is located in the circular hole. The installation plate is located inside the second pump casing. A connecting seat is detachably and fixedly connected to the other side of the installation plate. An impeller is installed on the other side of the connecting seat. A sealing rod is fixedly connected to one side of the installation plate close to the connecting seat. A connecting groove is formed in one side of the connecting seat close to the sealing rod, and the sealing rod is inserted into the connecting groove.

6. A centrifugal pump casing sealing mechanism as claimed in claim 5, characterized in that: The connecting component further includes a connecting ring rotatably connected to the inside of the installation groove. A plurality of telescopic rods are respectively fixedly connected to the connecting ring. The telescopic ends of the plurality of telescopic rods are respectively fixedly connected to elastic rubber blocks, and the plurality of elastic rubber blocks are respectively fixedly connected to the sealing sleeve.

7. A centrifugal pump casing sealing mechanism according to claim 6, characterized in that: The connecting component further includes an arc-shaped elastic sealing plate connected between the plurality of elastic rubber blocks, and guiding springs are sleeved on the plurality of telescopic rods.

8. A centrifugal pump casing sealing mechanism according to claim 7, characterized in that: The connecting component further includes two sealing rubber discs sleeved on the surface of the rotating shaft. The two sealing rubber discs are respectively located on the inner and outer sides of one side of the first pump casing close to the circular hole, and the two sealing rubber discs correspond to the circular hole.

9. A centrifugal pump casing sealing mechanism according to claim 8, characterized in that: The connecting component further includes circular sealing grooves formed in both sides of the inside of one side of the first pump casing close to the circular hole. The circular hole is located between the two circular sealing grooves. Circular sealing columns are fixedly connected to one side of the two sealing rubber discs close to the two circular sealing grooves, and the two circular sealing columns are respectively slidably connected to the two circular sealing grooves.

10. A centrifugal pump casing sealing mechanism according to claim 2, characterized in that: The first pump casing and the second pump casing are fixedly connected with circular connecting blocks on one side close to each other, and the two circular connecting blocks are detachably fixedly connected by bolts and nuts. The inner walls of the first pump casing and the second pump casing on one side close to the two circular connecting blocks are fixedly connected with corrosion-resistant sealing plates. A groove is provided on the upper end of the base close to the two circular connecting blocks, and the bottoms of the two circular connecting blocks are located inside the groove. One side of the second pump casing is connected to a water inlet pipe, and the top of the second pump casing is connected to a water outlet pipe.

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