Vertical multistage centrifugal pump

Abstract

The utility model relates to a vertical multistage centrifugal pump, including the pump body, the top of pump body is provided with motor, the bottom of pump body is provided with fixed base, the one side of fixed base outer surface is provided with the water inlet, the other side of fixed base outer surface is provided with the water outlet, the outer surface of fixed base is provided with the sleeve, the inside rotation of sleeve is connected with first screw rod, the bottom of fixed base is provided with the screw hole, and the upper end of first screw rod is inserted in the screw hole and is connected with its thread, be provided with locking mechanism between the outer surface of fixed base and sleeve. Through rotating first screw rod, can adjust the height of water inlet and water outlet, thereby need not to adopt the mode of increasing or reducing gasket to carry out height adjustment, install more convenient, and the accuracy is high when height adjustment, can ensure that water inlet and water outlet and outside pipeline are in coaxial state, reduce the interference that water flows when connecting, reduce energy loss.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, specifically a vertical multistage centrifugal pump. Background Technology

[0002] A vertical multistage centrifugal pump is a common fluid transport device with a vertically mounted pump shaft. It mainly consists of multiple impellers installed sequentially on the same pump shaft, forming a multistage structure. During operation, the motor drives the pump shaft to rotate, and fluid is drawn into the first-stage impeller from the pump inlet. Under the high-speed rotation of the impeller, the fluid gains energy, increasing its pressure and velocity, and then enters the next-stage impeller for further pressurization. Through the continuous action of multiple impellers, the fluid achieves a high head and is finally discharged from the pump outlet. This type of pump features a small footprint, compact structure, stable flow rate, and high head, and is widely used in urban water supply, high-rise building water supply and drainage, industrial circulation systems, fire protection systems, and many other fields.

[0003] Currently, the inlet and outlet of vertical multistage centrifugal pumps are usually located near the bottom and are at a fixed height. When the height of the external water pipe does not match the height of the pump's inlet and outlet, the height needs to be adjusted by adding or removing shims. This is not only cumbersome, but also, because the shims have a certain thickness, the height adjustment is not precise enough, and there is still a small height difference. This height difference will cause the water to be disturbed when flowing at the connection between the pump and the external water pipe, resulting in additional energy loss. Utility Model Content

[0004] The purpose of this invention is to provide a vertical multistage centrifugal pump that effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A vertical multistage centrifugal pump includes a pump body, a motor mounted on the top of the pump body, and a fixed base mounted on the bottom of the pump body. An inlet is located on one side of the outer surface of the fixed base, and an outlet is located on the other side. A sleeve is mounted on the outer surface of the fixed base, and a first screw is rotatably connected inside the sleeve. A threaded hole is formed at the bottom of the fixed base, and the upper end of the first screw is inserted into and threadedly connected to the hole. A locking mechanism is provided between the outer surfaces of the fixed base and the sleeve.

[0007] Therefore, by rotating the first screw, the height of the inlet and outlet can be adjusted, eliminating the need to add or remove shims for height adjustment. This makes installation more convenient and provides high precision in height adjustment, ensuring that the inlet and outlet are coaxial with the external pipe, reducing interference to water flow at the connection point and minimizing energy loss.

[0008] Furthermore, the locking mechanism includes an upper fixing block mounted on the outer surface of the fixed base, with a second screw connected to the lower surface of the upper fixing block. A lower fixing block is mounted on the outer surface of the sleeve, and a through hole is provided on the lower fixing block, with the second screw inserted inside the through hole. Nuts are mounted on both the upper and lower sides of the outer surface of the second screw on the lower fixing block.

[0009] Furthermore, a worm gear is mounted on the outer surface of the first screw, and a worm is rotatably mounted inside the sleeve, with the worm meshing with the worm gear.

[0010] Furthermore, the end of the worm extends to the outside of the sleeve, and a hexagonal groove is provided at the end of the worm.

[0011] Furthermore, a limiting groove is formed on the inner wall of the sleeve in the vertical direction, and a limiting block is provided on the outer surface of the fixing seat, with the limiting block set in the limiting groove.

[0012] Furthermore, the outer surface of the sleeve is provided with a skirt, and the surface of the skirt is provided with multiple mounting holes.

[0013] Furthermore, the locking mechanism is provided in multiple sets, and the multiple sets of locking mechanisms are distributed coaxially at equal angles.

[0014] Furthermore, a bearing is installed on the bottom wall of the sleeve, and the bottom of the first screw is installed inside the bearing.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0016] This invention allows for the adjustment of the height of the inlet and outlet by rotating the first screw, eliminating the need for adding or removing shims. This makes installation more convenient and provides high precision in height adjustment, ensuring that the inlet and outlet are coaxial with the external pipe. This reduces interference with water flow at the connection point and minimizes energy loss. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a front view structural diagram of the present utility model;

[0019] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0020] Figure 4 This is a top view of the sleeve structure in this utility model;

[0021] Figure 5 for Figure 2 Enlarged diagram of A in the middle;

[0022] Figure 6 for Figure 3 Enlarged diagram of B in the diagram.

[0023] In the diagram: 1. Pump body; 2. Motor; 3. Mounting base; 301. Inlet; 302. Outlet; 303. Limiting block; 4. Sleeve; 401. First screw; 402. Screw hole; 403. Limiting groove; 404. Worm gear; 405. Worm; 406. Hexagonal groove; 5. Locking mechanism; 501. Upper fixing block; 502. Second screw; 503. Lower fixing block; 504. Nut; 6. Skirt; 601. Mounting hole. 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 Figures 1-6 This utility model provides a vertical multistage centrifugal pump, including a pump body 1, a motor 2 mounted on the top of the pump body 1, and a fixed base 3 mounted on the bottom of the pump body 1. An inlet 301 is located on one side of the outer surface of the fixed base 3, and an outlet 302 is located on the other side of the outer surface of the fixed base 3. A sleeve 4 is mounted on the outer surface of the fixed base 3, and a first screw 401 is rotatably connected inside the sleeve 4. A screw hole 402 is provided at the bottom of the fixed base 3, and the upper end of the first screw 401 is inserted into the screw hole 402 and threadedly connected thereto. A locking mechanism 5 is provided between the outer surfaces of the fixed base 3 and the sleeve 4.

[0026] During the installation of the centrifugal pump, rotating the first screw 401, under the action of the threaded connection, can drive the fixed base 3 to rise and fall, thereby adjusting the height of the inlet 301 and the outlet 302. Thus, when installing the centrifugal pump, there is no need to adjust the height by adding or removing shims, making the installation more convenient. Moreover, the height adjustment is highly accurate, ensuring that the inlet 301 and the outlet 302 are in a coaxial state with the external pipeline, reducing interference to the water flow at the connection and reducing energy loss.

[0027] Furthermore, after the height of the fixed base 3 is adjusted, the locking mechanism 5 can be used to lock the fixed base 3 and the sleeve 4, ensuring the stability of the height of the fixed base 3 during later use and preventing uneven stress at the connection due to a decrease in height, which could lead to leakage.

[0028] Preferably, the locking mechanism 5 includes an upper fixing block 501 mounted on the outer surface of the fixing base 3, and a second screw 502 connected to the lower surface of the upper fixing block 501. A lower fixing block 503 is mounted on the outer surface of the sleeve 4, and a through hole is provided on the lower fixing block 503, with the second screw 502 inserted inside the through hole. Nuts 504 are mounted on both the upper and lower sides of the outer surface of the second screw 502 located on the lower fixing block 503.

[0029] When adjusting the height of the fixed base 3, first turn the two nuts 504 in opposite directions to move them away from the lower fixed block 503, so that the second screw 502 can move up and down inside the through hole to adapt to the change in the height of the fixed base 3. After the height is adjusted, turn the two nuts 504 to press them against the upper and lower sides of the lower fixed block 503, so that the height of the fixed base 3 can be locked to prevent its height from changing during later use.

[0030] Preferably, a worm gear 404 is mounted on the outer surface of the first screw 401, and a worm 405 is rotatably mounted inside the sleeve 4, with the worm 405 meshing with the worm gear 404.

[0031] Through the meshing relationship between the worm 405 and the worm wheel 404, when the worm 405 is turned, the first screw 401 can be driven to rotate to adjust the height of the fixed seat 3. Furthermore, the transmission between the worm 405 and the worm wheel 404 has a high transmission ratio, which allows the height of the fixed seat 3 to be adjusted with a small force, making it more labor-saving. It also has self-locking properties and better stability.

[0032] Preferably, the end of the worm 405 extends to the outside of the sleeve 4, and the end of the worm 405 is provided with a hexagonal groove 406.

[0033] A hex wrench can be used externally to rotate the worm gear 405. The hex wrench can be used with a socket to save effort.

[0034] Preferably, the inner wall of the sleeve 4 is provided with a limiting groove 403 in the vertical direction, and the outer surface of the fixing seat 3 is provided with a limiting block 303, and the limiting block 303 is disposed in the limiting groove 403.

[0035] By setting the limiting groove 403 and the limiting block 303, the angle of the fixed seat 3 can be limited, so that it can overcome its own rotation and rise and fall in the vertical direction when the first screw 401 rotates.

[0036] Preferably, the outer surface of the sleeve 4 is provided with a skirt 6, and the surface of the skirt 6 is provided with a plurality of mounting holes 601.

[0037] The centrifugal pump can be fixedly mounted on a bracket, cement base or other structure by means of the skirt 6 and the mounting hole 601.

[0038] Preferably, the locking mechanism 5 is provided in multiple sets, and the multiple sets of locking mechanisms 5 are distributed coaxially at equal angles.

[0039] The multiple locking mechanisms 5 not only improve the locking effect between the fixed seat 3 and the sleeve 4, but also make the force more uniform and the stability better. Furthermore, the combined action of multiple second screws 502 and first screws 401 can provide stable support.

[0040] Preferably, a bearing is installed on the bottom wall of the sleeve 4, and the bottom of the first screw 401 is installed inside the bearing.

[0041] By using bearings, the resistance of the first screw 401 during rotation can be reduced. Even if the installation position of the centrifugal pump is moved later, the first screw 401 can still rotate easily, making it easy to adjust the height.

[0042] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vertical multistage centrifugal pump, comprising a pump body (1), wherein a motor (2) is disposed at the top of the pump body (1), and a fixed base (3) is disposed at the bottom of the pump body (1), characterized in that: A water inlet (301) is provided on one side of the outer surface of the fixed base (3), and a water outlet (302) is provided on the other side of the outer surface of the fixed base (3). A sleeve (4) is provided on the outer surface of the fixed base (3). A first screw (401) is rotatably connected inside the sleeve (4). A screw hole (402) is opened at the bottom of the fixed base (3), and the upper end of the first screw (401) is inserted into the screw hole (402) and threadedly connected to it. A locking mechanism (5) is provided between the outer surfaces of the fixed base (3) and the sleeve (4).

2. A vertical multistage centrifugal pump according to claim 1, characterized in that: The locking mechanism (5) includes an upper fixing block (501) installed on the outer surface of the fixing base (3), and a second screw (502) is connected to the lower surface of the upper fixing block (501). The outer surface of the sleeve (4) is provided with a lower fixing block (503), the lower fixing block (503) is provided with a through hole, and the second screw (502) is inserted into the through hole; Nuts (504) are installed on both the upper and lower sides of the lower fixing block (503) on the outer surface of the second screw (502).

3. A vertical multistage centrifugal pump according to claim 1, characterized in that: A worm gear (404) is mounted on the outer surface of the first screw (401), and a worm (405) is rotatably mounted inside the sleeve (4), and the worm (405) is meshed with the worm gear (404).

4. A vertical multistage centrifugal pump according to claim 3, characterized in that: The end of the worm (405) extends through to the outside of the sleeve (4), and the end of the worm (405) is provided with a hexagonal groove (406).

5. A vertical multistage centrifugal pump according to claim 1, characterized in that: The inner wall of the sleeve (4) is provided with a limiting groove (403) in the vertical direction, and the outer surface of the fixing seat (3) is provided with a limiting block (303), and the limiting block (303) is disposed in the limiting groove (403).

6. A vertical multistage centrifugal pump according to claim 1, characterized in that: The outer surface of the sleeve (4) is provided with a skirt (6), and the surface of the skirt (6) is provided with a plurality of mounting holes (601).

7. A vertical multistage centrifugal pump according to claim 2, characterized in that: The locking mechanism (5) is provided in multiple sets, and the multiple sets of the locking mechanism (5) are distributed at the same angle and coaxial.

8. A vertical multistage centrifugal pump according to claim 1, characterized in that: The bottom wall of the sleeve (4) is fitted with a bearing, and the bottom of the first screw (401) is fitted inside the bearing.

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