Protective cover for multi-stage centrifugal pump and multi-stage centrifugal pump

Abstract

The utility model discloses a protective cover for a multi-stage centrifugal pump and the multi-stage centrifugal pump, and belongs to the technical field of equipment safety protection. A flange, built-in shells and an end cover are arranged at the axial tail end of the multi-stage centrifugal pump, the built-in shells are connected between the flange and the end cover, the built-in shells are a part of a rotary body structure, the two built-in shells are symmetrically distributed in the vertical direction, and observation windows are formed in the left-right direction; the rotary body structure comprises two transparent protection covers, the two transparent protection covers are the same in size and specification and used for shielding the two observation windows respectively, the transparent protection covers are one part of the rotary body structure, the two transparent protection covers are detachably connected to the flange or the end cover, and the transparent protection covers and a shell of the rotary body structure jointly form the rotary body structure. The protective cover is additionally arranged to shield the observation window, so that the safety is improved; the protective cover is transparent, so that observation is facilitated; the transparent protective cover is of a revolving body structure matched with the self-contained shell, so that interference can be avoided; and the transparent protective cover is detachably arranged, so that maintenance is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment safety protection, in particular to a protective cover for a multi-stage centrifugal pump and the multi-stage centrifugal pump. Background Art

[0002] In industries involving fluid transportation such as liquor and beverage water treatment, multi-stage centrifugal pumps are needed for the energy supply of fluid transportation. The protective cover of the protruding part of the axial end of the centrifugal pump cannot completely cover the end of the pump body, which may easily cause safety hazards, such as Figure 1 shown.

[0003] Current multi-stage centrifugal pumps feature a flange, a built-in housing, and an end cap at the axial end. The built-in housing is connected between the flange and the end cap to partially shield the axial end. The built-in housing is part of the rotating structure and is provided in two locations, symmetrically located above and below. This creates observation windows on both sides, allowing operators to observe the operating status of internal components, such as abnormal vibrations, leaks, or component wear. In applications where operational safety is critical, such as cooling water pumps in nuclear power plants, observation windows allow maintenance personnel to conduct preliminary inspections of the pump's interior without removing the protective casing.

[0004] During the operation of boiler system auxiliary equipment in the energy supply of the liquor and beverage production industry, production sites utilize dozens of multi-stage centrifugal pumps. These large, exposed rotating parts are prominent, with the exposed portion of the pump shaft end measuring 16 cm long and 25 cm high, representing 80% of the exposed area. To ensure proper operation, personnel must closely observe the system and verify the sound and temperature of the equipment. During on-site inspections, personnel are prone to touching the exposed rotating parts, which can easily cause hand injuries and compromise inspection quality. Furthermore, due to aging equipment, the large exposed areas hinder proper equipment protection, making mechanical failures highly susceptible to injury. Utility Model Content

[0005] In order to overcome the problem of potential safety hazards caused by the arrangement of an observation window in the existing multi-stage centrifugal pump, the utility model provides a protective cover for the multi-stage centrifugal pump and the multi-stage centrifugal pump.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A protective cover for a multi-stage centrifugal pump, wherein the axial end of the multi-stage centrifugal pump is provided with a flange, a self-contained shell and an end cover, the self-contained shell is connected between the flange and the end cover, the self-contained shell is part of the rotating body structure, and the self-contained shell is two symmetrically distributed in the upper and lower directions, forming observation windows in the left and right directions; it includes a transparent protective cover, which is provided with two transparent protective covers of the same size and specifications, respectively used for covering the two observation windows, the transparent protective cover is part of the rotating body structure, the two transparent protective covers are detachably connected to the flange or the end cover, and the transparent protective cover and the self-contained shell together constitute the rotating body structure.

[0008] In this application, safety is improved by adding a protective cover to block the observation window; the protective cover is configured to be transparent to facilitate the operator to observe the internal situation; the transparent protective cover is a rotating body structure that is compatible with its own shell, which can avoid interference with the moving parts; the transparent protective cover is detachable and connected to facilitate the operator to maintain the internal parts.

[0009] In some embodiments, the proximal flange side or the proximal end cover side of the transparent protective cover extends outward, and the outer ring of the extension is connected to a clamp to achieve a detachable connection of the transparent protective cover.

[0010] In some embodiments, one side of the proximal cover of the transparent protective cover extends outward, the inner ring of the extension is in contact with the end cover, and the outer ring of the extension is connected to the clamp; a groove opening inward is formed at one end of the transparent protective cover proximal to the flange, and the groove size is adapted to the flange, and the groove and the flange cooperate to limit the axial movement of the transparent protective cover.

[0011] In some embodiments, a proximal end cap side of the transparent protective cover extends outwardly to be flush with an end surface of the end cap.

[0012] In some embodiments, a flange is provided on the outermost radial side extending outward from one side of the proximal cover of the transparent protective cover to limit the axial movement of the clamp.

[0013] In some embodiments, the proximal flange side or the proximal end cover side of the transparent protective cover extends outward, and the extension is detachably connected by bolts.

[0014] In some embodiments, a stopper is provided at the edge of the transparent protective cover that contacts the self-contained shell, and the stopper cooperates with the inner side wall of the self-contained shell.

[0015] In some embodiments, the transparent protective cover is made of transparent plastic.

[0016] The utility model also provides a multi-stage centrifugal pump, which has a flange, a self-contained shell and an end cover at the axial end thereof. The self-contained shell is connected between the flange and the end cover. The self-contained shell is part of the rotating body structure. The self-contained shell is symmetrically distributed in two upper and lower positions, and observation windows are formed in the left and right positions. The self-contained shell also includes the transparent protective cover described in any of the above embodiments. The transparent protective cover can be detachably connected to the flange or the end cover to block the two observation windows.

[0017] The beneficial effects of the utility model are:

[0018] Safety is improved by adding a protective cover to block the observation window; the protective cover is configured to be transparent to facilitate the operator to observe the internal situation; the transparent protective cover is a rotating body structure adapted to its own shell to avoid interference with the moving parts; the transparent protective cover is detachable and connected to facilitate the operator to maintain the internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a simplified structural diagram of the axial end of a multi-stage centrifugal pump in the prior art;

[0020] Figure 2 A simplified structural diagram of a multi-stage centrifugal pump provided in this application;

[0021] Figure 3 for Figure 2 A simplified schematic diagram of the protective cover used for a multi-stage centrifugal pump.

[0022] The markings in the figure are: 0-observation window, 1-flange, 2-self-contained housing, 3-end cover, 4-transparent protective cover, 5-clamp, 6-groove, 7-flange. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] like Figure 2-Figure 3 As shown, the utility model provides a protective cover for a multi-stage centrifugal pump and a multi-stage centrifugal pump.

[0026] A protective cover for a multi-stage centrifugal pump, wherein the axial end of the multi-stage centrifugal pump is provided with a flange 1, a self-contained shell 2 and an end cover 3, the self-contained shell 2 is connected between the flange 1 and the end cover 3, the self-contained shell 2 is part of the rotating body structure, and the self-contained shell 2 is two symmetrically distributed in the upper and lower directions, forming an observation window 0 in the left and right directions; it includes a transparent protective cover 4, which is set as two transparent protective covers 4 of the same size and specifications, respectively used for shielding the two observation windows 0, the transparent protective cover 4 is part of the rotating body structure, the two transparent protective covers 4 are detachably connected to the flange 1 or the end cover 3, and the transparent protective cover 4 and the self-contained shell 2 together constitute the rotating body structure.

[0027] In this application, a protective cover is added to block the observation window 0 to improve safety; the protective cover is configured to be transparent to facilitate the operator to observe the internal situation; the transparent protective cover 4 is a rotating body structure that is compatible with the built-in shell 2, which can avoid interference with the moving parts; the transparent protective cover 4 is detachably connected to facilitate the operator to maintain the internal parts.

[0028] In some embodiments, the side of the transparent protective cover 4 proximal to the flange 1 or the side proximal to the end cover 3 extends outward, and the outer ring of the extension is connected to the clamp 5 to achieve a detachable connection of the transparent protective cover 4.

[0029] The detachable connection is achieved by the clamp 5, which is convenient to open and close and easy to operate.

[0030] In this embodiment, one side of the proximal end cover 3 of the transparent protective cover 4 extends outward, the inner ring of the extension is in contact with the end cover 3, and the outer ring of the extension is connected to the clamp 5; a groove 6 opening inward is formed at one end of the proximal flange 1 of the transparent protective cover 4, and the size of the groove 6 is adapted to the flange 1. The groove 6 and the flange 1 cooperate to limit the axial movement of the transparent protective cover 4.

[0031] Combine Figure 2 and Figure 3 As shown, a groove 6 is formed on one side of the flange 1 of the transparent protective cover 4. The groove 6 cooperates with the flange 1 to limit the axial movement of the transparent protective cover 4. A clamp 5 is connected to one side of the end cap 3 of the transparent protective cover 4 to limit the radial movement of the transparent protective cover 4. This facilitates installation and disassembly, reducing maintenance costs.

[0032] In this embodiment, the side of the transparent protective cover 4 proximal to the end cover 3 extends outward to be flush with the end surface of the end cover 3 .

[0033] In this embodiment, a flange 7 is provided on the outermost radial side of the proximal cover 3 of the transparent protective cover 4 to limit the axial movement of the clamp 5 .

[0034] In some embodiments, the transparent protective cover 4 extends outward near the flange 1 or the end cover 3, and the extension is detachably connected by bolts. Obviously, the detachable connection using bolts is more complicated to install and disassemble than in this embodiment.

[0035] In some embodiments, a stopper is provided at the edge of the transparent protective cover 4 that contacts the self-contained housing 2 , and the stopper cooperates with the inner side wall of the self-contained housing 2 .

[0036] A stop is added to prevent the transparent protective cover 4 from being improperly positioned during assembly in the circumferential direction.

[0037] In this embodiment, the transparent protective cover 4 is made of transparent plastic.

[0038] Specifically, materials such as polycarbonate (PC) and polystyrene (PMMA) can be selected, which are characterized by good light transmittance, high temperature resistance, certain toughness, light material, low cost, and will not bring weight load to the multi-stage centrifugal pump.

[0039] The transparent material may also be glass, etc., but since the device may vibrate during operation, its use effect is not as good as the transparent plastic in this embodiment.

[0040] Installation and use process: Insert two transparent protective covers 4 with the same specifications and sizes, insert the left side into the flange 1 of the multi-stage centrifugal pump to prevent it from moving axially, and buckle the middle part with the housing 2 of the multi-stage centrifugal pump. The transparent protective cover 4 cannot rotate after being fixed, and fit the right side with the end cover 3 of the multi-stage centrifugal pump. Then fix it with a clamp 5 to complete the installation and use.

[0041] Disassembly and maintenance process: During the application process, the transparent protective cover 4 may be aged or broken, or the multi-stage centrifugal pump may need to be repaired. In this case, the transparent protective cover 4 needs to be disassembled. You only need to loosen the clamp 5 and then remove the transparent protective cover 4 radially.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A protective cover for a multi-stage centrifugal pump, wherein the axial end of the multi-stage centrifugal pump is provided with a flange (1), a self-contained housing (2) and an end cover (3), wherein the self-contained housing (2) is connected between the flange (1) and the end cover (3), and the self-contained housing (2) is a part of the rotating body structure. The self-contained housing (2) is symmetrically distributed in the upper and lower directions, and an observation window (0) is formed in the left and right directions. The invention is characterized in that: The invention comprises a transparent protective cover (4), wherein the transparent protective cover (4) is provided as two transparent protective covers (4) of the same size and specification, respectively used for shielding two observation windows (0), the transparent protective cover (4) being a part of the rotary body structure, the two transparent protective covers (4) being detachably connected to the flange (1) or the end cover (3), and the transparent protective cover (4) and the self-contained housing (2) together forming the rotary body structure.

2. The protective cover for a multistage centrifugal pump according to claim 1, wherein: The side of the transparent protective cover (4) proximal to the flange (1) or the side proximal to the end cover (3) extends outward, and the outer ring of the extension is connected to the hoop (5) to achieve a detachable connection of the transparent protective cover (4).

3. The protective cover for a multistage centrifugal pump according to claim 2, wherein: One side of the proximal end cover (3) of the transparent protective cover (4) extends outward, the inner ring of the extension is in contact with the end cover (3), and the outer ring of the extension is connected to the clamp (5); a groove (6) with an inward opening is formed at one end of the proximal flange (1) of the transparent protective cover (4), the size of the groove (6) is adapted to the flange (1), and the groove (6) and the flange (1) cooperate to limit the axial movement of the transparent protective cover (4).

4. The protective cover for a multi-stage centrifugal pump according to claim 3, wherein: One side of the transparent protective cover (4) proximal to the end cover (3) extends outwards until it is flush with the end surface of the end cover (3).

5. The protective cover for a multi-stage centrifugal pump according to claim 3, wherein: A flange (7) is provided on the outermost radial side of one side of the proximal end cover (3) of the transparent protective cover (4) extending outwards, so as to limit the axial movement of the clamp (5).

6. The protective cover for a multi-stage centrifugal pump according to claim 1, wherein: The side of the transparent protective cover (4) proximal to the flange (1) or the side proximal to the end cover (3) extends outwards, and the extension is detachably connected by bolts.

7. The protective cover for a multi-stage centrifugal pump according to claim 1, wherein: A stop is provided on the edge of the transparent protective cover (4) where it contacts the self-contained housing (2), and the stop is matched with the inner side wall of the self-contained housing (2).

8. The protective cover for a multi-stage centrifugal pump according to any one of claims 1 to 7, characterized in that: The transparent protective cover (4) is made of transparent plastic.

9. A multistage centrifugal pump, wherein the axial end of the multistage centrifugal pump is provided with a flange (1), a self-contained housing (2) and an end cover (3), the self-contained housing (2) is connected between the flange (1) and the end cover (3), the self-contained housing (2) is part of the rotating body structure, the self-contained housing (2) is symmetrically distributed in two positions in the upper and lower directions, and an observation window (0) is formed in the left and right directions, wherein the pump is characterized by: It also comprises a transparent protective cover (4) as described in any one of claims 1 to 8, wherein the transparent protective cover (4) is detachably connected to the flange (1) or the end cover (3) to shield the two observation windows (0).

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