Suspension type circulating pump mounting structure

Abstract

The utility model discloses a suspension type circulating pump mounting structure, and relates to a large vertical diagonal flow type circulating water pump. Comprising a motor and a pump body, the bottom of the motor is connected with a motor support, the motor support is of a big-end-down trapezoidal table structure, and the bottom face of the motor support is provided with a support base plate used for being fixedly connected with a basic face; the lower end of the bracket bottom plate is connected with the pump body; a water outlet is formed in the side face of the middle of the pump body, and a water suction opening is formed in the lower end of the pump body. A water suction pool is arranged below the water suction opening and is in an L shape, and a water suction flow guide structure is arranged at the bottom corner of the water suction pool. According to the utility model, the strength of the motor bracket is further enhanced by arranging the motor bracket with the trapezoidal table structure. Moreover, the water inlet flow state is further improved through the water suction tank, the influence of water flow on the circulating water pump is reduced, and the problem that the circulating water pump is forced to stop due to large vibration in a short time is effectively solved.

Description

Technical Field

[0001] The utility model relates to a large vertical oblique flow circulating water pump, in particular to an improvement on the installation structure of a suspended circulating pump. Technical Background

[0002] Circulating water is used in supercritical coal-fired power generation units. The circulating water pump is installed vertically and on a single foundation layer. The outlet is below the foundation layer, and the rotor lifting height is adjusted by rotating the shaft end adjustment nut. During operation, large vibrations frequently occur and forced shutdowns occur. After disassembly, it was found that the bearings and sleeves were severely worn. Through methods such as adjusting the foundation level, rebalancing the impeller, replacing the bearings, and reinforcing the outer cylinder, the problem of the circulating water pump being forced to shut down due to large vibrations in the short term could not be solved. Later, through spectrum analysis, it was determined that the triple frequency induced by the circulating pump blades was close to the natural frequency of the foundation, resulting in resonance.

[0003] Therefore, how to solve the problem of circulating water pump resonance is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0004] In view of the above problems, the utility model provides a suspended circulating pump installation structure which can effectively solve the vibration of the circulating water pump.

[0005] The suspended circulating pump installation structure comprises a motor and a pump body, wherein the bottom of the motor is connected to a motor bracket, the motor bracket is a trapezoidal structure with a small top and a large bottom, and the bottom surface of the motor bracket is provided with a support base plate for fixing and connecting the base surface; the lower end of the bracket base plate is connected to the pump body;

[0006] A water outlet is provided on the side of the middle portion of the pump body, and a water suction port is provided at the lower end of the pump body;

[0007] A water suction pool is provided below the water suction port. The water suction pool is L-shaped, and a water suction guide structure is provided at the bottom corner of the water suction pool.

[0008] Furthermore, the foundation surface is provided with a central hole, a circle of mounting grooves is provided on the periphery of the central hole, a number of anchor bolts are provided in the mounting grooves, inclined washers are sleeved on the anchor bolts, a circle of grouting baffles is provided on the inner side of the anchor bolts and on the edge facing the central hole opening, and a foundation platform is pressed on the upper part of the grouting baffles and the inclined washers; after the foundation platform is leveled by the inclined washers, concrete slurry is poured into the mounting grooves.

[0009] Furthermore, the water absorption and diversion structure is arranged at the bottom corner of the water absorption pool, and is W-shaped as a whole, with side slopes on both sides, a middle slope between the side slopes on both sides, and an end slope on the end face between the side slope and the middle slope.

[0010] Furthermore, a sealing gasket is provided between the support base plate and the foundation platen.

[0011] Furthermore, an impeller is provided inside the pump body, and the impeller is provided with at least three blades.

[0012] By providing a motor bracket with a trapezoidal platform structure, the strength of the motor bracket is further enhanced. Moreover, by means of the suction pool, the inflow water flow pattern is further improved, the influence of the water flow on the circulating water pump is reduced, and the problem that the circulating water pump vibrates greatly and is forced to stop operating in a short period of time is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model,

[0014] Figure 2 is Figure 1 an enlarged view of part A in

[0015] Figure 3 is a schematic diagram of the principle of the suction pool in the present utility model,

[0016] Figure 4 is Figure 3 a top view of

[0017] Figure 5 is a perspective view of the suction pool in the present utility model,

[0018] In the figure: 1 is the motor, 2 is the motor bracket, 3 is the support base plate, 31 are the anchor bolts, 4 is the bevel washer, 5 is the water outlet, 6 is the pump body, 7 is the water suction port, 8 is the suction pool, 81 is the side slope, 82 is the middle slope, 83 is the end face slope,

[0019] 9 is the foundation surface, 91 is the installation groove, 92 is the foundation platen, 93 is the grouting baffle, 94 is the sealing gasket;

[0020] Figure 3 The arrow in SPECIFIC EMBODIMENTS

[0021] In order to make the application purpose, technical solution and beneficial technical effects of the present application clearer, the present application will be further described in detail below in conjunction with embodiments. It should be understood that the embodiments described in this specification are only for explaining the present application and not for limiting the present application.

[0022] For simplicity, this application only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form a range not explicitly recited; and any lower limit can be combined with other lower limits to form a range not explicitly recited, and similarly any upper limit can be combined with any other upper limit to form a range not explicitly recited. In addition, although not explicitly recited, each point or single value between the range endpoints is included in the range. Thus, each point or single value can be used as its own lower or upper limit and combined with any other point or single value or combined with other lower or upper limits to form a range not explicitly recited.

[0023] In the description of this application, it should be noted that unless otherwise specified, "above" and "below" include this number, and the meaning of "multiple" in "one or more" is two or more.

[0024] The above application content of this application does not intend to describe every disclosed embodiment or every implementation manner in this application. The following description more specifically gives examples of exemplary embodiments. Throughout the application, guidance is provided through a series of embodiments, which can be used in various combinations. In each instance, the listing is only a representative group and should not be construed as exhaustive.

[0025] The following combines the attached Figures 1-5 Describe the embodiments of the present utility model in detail;

[0026] The present utility model includes

[0027] A motor 1 and a pump body 6, characterized in that a motor bracket 2 is connected to the bottom of the motor 1. The motor bracket 2 is a trapezoidal platform structure with a smaller upper part and a larger lower part. A support base plate 3 for fixedly connecting to the base surface 9 is provided on the bottom surface of the motor bracket 2; the lower end of the support base plate 3 is connected to the pump body 6;

[0028] A water outlet 5 is provided on the side surface of the middle part of the pump body 6, and a water suction port 7 is provided at the lower end of the pump body 6;

[0029] A suction pool 8 is provided below the water suction port 7. The suction pool 8 is L-shaped, and a water suction diversion structure is provided at the bottom corner of the suction pool 8.

[0030] By providing a motor bracket with a trapezoidal platform structure, the strength of the motor bracket is further enhanced. And, by the suction pool, the inflow water flow pattern is further improved, the influence of the water flow on the circulating water pump is reduced, and the problem that the circulating water pump vibrates greatly and is forced to stop operating in a short period of time is effectively solved.

[0031] Furthermore, the base surface 10 is provided with a middle hole. A mounting groove 91 is provided on the periphery of the middle hole. A number of anchor bolts 31 are provided in the mounting groove 91. An inclined shim 4 is sleeved on the anchor bolt 31. A grouting baffle 93 is provided on the inner side of the anchor bolt 31, towards the edge of the middle hole orifice. A foundation soleplate 92 is pressed on the upper part of the grouting baffle 93 and the inclined shim 4. After the foundation soleplate 92 is leveled by the inclined shim 4, concrete slurry is poured into the mounting groove 91 to ensure the level of the bottom plate. Secondary grouting is required to reduce the problem of large vibration of the circulating water pump.

[0032] Furthermore, the water absorption and diversion structure is arranged at the bottom corners of the suction tank 8, and is integrally in a W shape. Side slopes 81 are provided on both sides. An intermediate slope 82 is provided between the two side slopes 81. An end face slope 83 is provided on the end face between the side slope 81 and the intermediate slope 82, which can provide a good water inlet flow pattern, ensure that the water pump can smoothly suck water when the suction port 7 sucks water, and prevent sediment and impurities from entering the water pump, thereby protecting the normal operation of the water pump.

[0033] Furthermore, a sealing gasket 94 is provided between the support base plate 3 and the foundation soleplate 9. An expanded polytetrafluoroethylene sealing gasket can be preferably used to absorb vibration and prevent interface leakage.

[0034] Furthermore, an impeller is provided in the pump body 6. The impeller is provided with at least three blades. Changing the number of impellers changes the inherent frequency difference, effectively solving the problem of large vibration of the circulating water pump.

[0035] It should be noted that the above specific embodiments are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art should understand that based on the technical content disclosed in this application document, various modifications, equivalent replacements, changes, etc. can be made to the present invention. However, as long as these transformations do not deviate from the spirit of the present invention, they should be within the protection scope of the present invention. In addition, some terms used in the description and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. Suspended circulation pump installation structure, including a motor (1) and a pump body (6), characterized in that, The bottom of the motor (1) is connected to a motor support (2). The motor support (2) is in the structure of a frustum of a pyramid with a smaller upper part and a larger lower part. The bottom surface of the motor support (2) is provided with a support base plate (3) for fixedly connecting to a base surface (9). The lower end of the support base plate (3) is connected to the pump body (6). On the side of the middle part of the pump body (6), a water outlet (5) is provided. At the lower end of the pump body (6), a water suction port (7) is provided. Below the water suction port (7), a suction pool (8) is provided. The suction pool (8) is in an L shape, and a water suction guiding structure is provided at the bottom corner of the suction pool (8).

2. The suspension type circulating pump installation structure according to claim 1, characterized in that, The base surface (10) is provided with a middle hole. A circle of installation grooves (91) is provided on the periphery of the middle hole. A number of anchor bolts (31) are provided in the installation grooves (91). A bevel washer (4) is sleeved on the anchor bolts (31). A circle of grouting baffles (93) is provided on the inner side of the anchor bolts (31) and at the edge facing the orifice of the middle hole. A base platen (92) is pressed on the upper part of the grouting baffles (93) and the bevel washer (4). After the base platen (92) is leveled by the bevel washer (4), concrete slurry is poured into the installation grooves (91).

3. The suspension type circulating pump installation structure according to claim 1, characterized in that, The water suction guiding structure is provided at the bottom corner of the suction pool (8), and is integrally in a W shape. Side slopes (81) are provided on both sides. An intermediate slope (82) is provided between the two side slopes (81). An end slope (83) is provided on the end face between the side slope (81) and the intermediate slope (82).

4. The suspension type circulating pump installation structure according to claim 1, wherein, A sealing gasket (94) is provided between the support base plate (3) and the base platen (9).

5. The suspension type circulating pump installation structure according to claim 1, characterized in that, An impeller is provided in the pump body (6), and the impeller is provided with at least three blades.

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