A desalted water pump for steam turbine units in thermal power plants

Abstract

The utility model discloses a desalted water pump for a steam turbine unit in a thermal power plant, and relates to the technical field of desalted water pumps, including a desalted water pump body, wherein the desalted water pump body is rotatably connected with a shaft body, a rod wall of the shaft body is fixedly sleeved with an impeller, a rod wall of the shaft body is slidably sleeved with a U-shaped scraper, the U-shaped scraper matches the inner wall of the desalted water pump body, a cavity is provided inside the shaft body, a fixing mechanism is provided inside the cavity, and the U-shaped scraper is fixedly connected to the outer surface of the shaft body through the fixing mechanism. The utility model rotates the shaft body, and then causes the U-shaped scraper to rotate accordingly, and then the salt scale attached to the inner wall of the desalted water pump body can be scraped off, so that the salt scale will not affect the working efficiency of the impeller.

Description

Technical Field

[0001] The utility model relates to the technical field of desalted water pumps, in particular to a desalted water pump for a steam turbine unit in a thermal power plant. Background Art

[0002] The desalted water pump is a special external water supply pump used to transport brine. Its main function is to deliver chemically treated desalted water to the deaerator to ensure that the water level in the deaerator tank is within the allowable range and to deoxygenate for use in the boiler.

[0003] However, after long-term use, salt scale will accumulate on the inner wall of the existing desalted water pump. If it is not cleaned for a long time, the water output of the desalted water pump may become smaller. Therefore, the staff is required to regularly open and clean the inside of the desalted water pump, which not only wastes the staff's physical strength, but also reduces the use efficiency of the desalted water pump. Utility Model Content

[0004] In view of the above problems existing in the existing desalted water pumps, the present utility model is proposed.

[0005] Therefore, the purpose of the utility model is to provide a desalting water pump for a steam turbine unit in a thermal power plant, which solves the problem that the existing desalting water pump requires workers to open it regularly to clean the inside of the desalting water pump, which not only wastes the workers' physical strength but also reduces the use efficiency of the desalting water pump.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A desalted water pump for a steam turbine unit in a thermal power plant comprises a desalted water pump body, wherein a shaft body is rotatably connected inside the desalted water pump body, an impeller is fixedly sleeved on a rod wall of the shaft body, a U-shaped scraper is slidably sleeved on the rod wall of the shaft body, the U-shaped scraper matches the inner wall of the desalted water pump body, a cavity is opened inside the shaft body, a fixing mechanism is arranged inside the cavity, and the U-shaped scraper is fixedly connected to the outer surface of the shaft body through the fixing mechanism.

[0008] Preferably, the fixing mechanism includes a knob, a screw rod, a sleeve, a first trapezoidal block and two second trapezoidal blocks, square holes are provided on both sides of the cavity, and the two second trapezoidal blocks are slidably arranged inside the corresponding square holes, the screw rod is rotatably connected to one side of the cavity, the sleeve is threadedly sleeved on the rod wall of the screw rod, the first trapezoidal block is fixedly connected to one end of the sleeve and matches with the two second trapezoidal blocks, a groove is provided on one side of the shaft body, one end of the screw rod passes through one side of the cavity and extends to the inside of the groove, and the knob is fixedly connected to one end of the screw rod and is located inside the groove.

[0009] Preferably, the inclined surfaces of the two second trapezoidal blocks are both provided with T-shaped grooves, and T-shaped blocks are slidably arranged inside the two T-shaped grooves, and the two T-shaped blocks are respectively fixedly connected to the two inclined surfaces of the first trapezoidal block.

[0010] Preferably, a mounting hole is opened on one side of the U-shaped scraper, and the mounting hole matches the shaft body.

[0011] Preferably, two fixing grooves are provided on the inner side of the mounting hole, and the two fixing grooves are matched with corresponding second trapezoidal blocks respectively.

[0012] Preferably, a hexagonal groove is formed on one side of the knob.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] 1. The utility model rotates the shaft body and then causes the U-shaped scraper to rotate accordingly, and then the salt scale attached to the inner wall of the desalted water pump body can be scraped off, so that the salt scale will not affect the working efficiency of the impeller.

[0015] 2. In the utility model, the U-shaped scraper is sleeved on the outer surface of the shaft body, and then the knob is rotated to rotate the screw rod, and then the cutter head drives the first trapezoidal block to squeeze the two second trapezoidal blocks, and the two second trapezoidal blocks are moved to the inside of the corresponding fixing grooves respectively, so that the U-shaped scraper can be fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 For the utility model Figure 1 A side cross-sectional view of the central axis body;

[0019] Figure 3 For the utility model Figure 1 A magnified schematic diagram of part A;

[0020] Figure 4 It is a schematic structural diagram of the connection between the first trapezoidal block and the second trapezoidal block of the utility model.

[0021] Description of reference numerals:

[0022] 1. Desalination water pump body; 2. Shaft; 3. Impeller; 4. U-shaped scraper; 5. Knob; 6. Screw; 7. T-shaped block; 8. Sleeve; 9. First trapezoidal block; 10. Second trapezoidal block. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] The utility model embodiment discloses a desalted water pump for a steam turbine unit in a thermal power plant.

[0025] The utility model provides Figure 1-Figure 3 A desalted water pump for a steam turbine unit in a thermal power plant shown in the figure comprises a desalted water pump body 1, an internal rotationally connected shaft body 2 of the desalted water pump body 1, an impeller 3 is fixedly sleeved on the rod wall of the shaft body 2, a U-shaped scraper 4 is slidably sleeved on the rod wall of the shaft body 2, the U-shaped scraper 4 matches the inner wall of the desalted water pump body 1, a cavity is opened inside the shaft body 2, a fixing mechanism is arranged inside the cavity, and the U-shaped scraper 4 is fixedly connected to the outer surface of the shaft body 2 through the fixing mechanism.

[0026] When the shaft body 2 rotates, the U-shaped scraper 4 rotates accordingly, and then the salt scale attached to the inner wall of the desalted water pump body 1 can be scraped off, so that the salt scale will not affect the working efficiency of the impeller 3.

[0027] In order to facilitate the fixing of the U-shaped scraper 4, Figure 1-Figure 3 As shown, the fixing mechanism includes a knob 5, a screw rod 6, a sleeve 8, a first trapezoidal block 9 and two second trapezoidal blocks 10. Square holes are provided on both sides of the cavity. The two second trapezoidal blocks 10 are slidably arranged inside the corresponding square holes respectively. The screw rod 6 is rotatably connected to one side of the cavity. The sleeve 8 is threadedly sleeved on the rod wall of the screw rod 6. The first trapezoidal block 9 is fixedly connected to one end of the sleeve 8 and matches with the two second trapezoidal blocks 10. A groove is provided on one side of the shaft body 2. One end of the screw rod 6 passes through one side of the cavity and extends to the inside of the groove. The knob 5 is fixedly connected to one end of the screw rod 6 and is located inside the groove. A mounting hole is provided on one side of the U-shaped scraper 4, and the mounting hole matches the shaft body 2. Two fixing grooves are provided on the inner side of the mounting hole, and the two fixing grooves match the corresponding second trapezoidal blocks 10 respectively.

[0028] The U-shaped scraper 4 is sleeved on the outer surface of the shaft body 2, and then the knob 5 is rotated to rotate the screw 6, and then the cutter head 8 drives the first trapezoidal block 9 to squeeze the two second trapezoidal blocks 10, and the two second trapezoidal blocks 10 are moved to the inside of the corresponding fixing grooves respectively, so that the U-shaped scraper 4 can be fixed.

[0029] And in order to facilitate the replacement of the U-shaped scraper 4, as Figure 2-Figure 4As shown, the inclined surfaces of the two second trapezoidal blocks 10 are both provided with T-shaped grooves, and T-shaped blocks 7 are slidably arranged inside the two T-shaped grooves. The two T-shaped blocks 7 are fixedly connected to the two inclined surfaces of the first trapezoidal block 9 respectively.

[0030] Rotate the knob 5 in the opposite direction, and then use the two T-shaped blocks 7 to make the two second trapezoidal blocks 10 move following the first trapezoidal block 9, so that the two second trapezoidal blocks 10 can be removed from the inside of the corresponding fixing grooves, so that the U-shaped scraper 4 can be disassembled, thereby facilitating the replacement of the U-shaped scraper 4.

[0031] Finally, in order to facilitate turning knob 5, Figure 1-Figure 3 As shown, a hexagonal groove is formed on one side of the knob 5.

[0032] The hexagonal wrench is inserted into the inside of the hexagonal groove, and then the knob 5 can be turned.

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A desalted water pump for a steam turbine unit in a thermal power plant, comprising a desalted water pump body (1), characterized in that: The desalted water pump body (1) is rotatably connected to a shaft body (2) inside, a rod wall of the shaft body (2) is fixedly sleeved with an impeller (3), a rod wall of the shaft body (2) is slidably sleeved with a U-shaped scraper (4), the U-shaped scraper (4) matches the inner wall of the desalted water pump body (1), a cavity is opened inside the shaft body (2), a fixing mechanism is arranged inside the cavity, and the U-shaped scraper (4) is fixedly connected to the outer surface of the shaft body (2) through the fixing mechanism.

2. The desalted water pump for a steam turbine unit in a thermal power plant according to claim 1, characterized in that: The fixing mechanism comprises a knob (5), a screw rod (6), a sleeve (8), a first trapezoidal block (9) and two second trapezoidal blocks (10); square holes are provided on both sides of the cavity; the two second trapezoidal blocks (10) are respectively slidably arranged inside the corresponding square holes; the screw rod (6) is rotatably connected to one side of the cavity; the sleeve (8) is threadedly sleeved on the rod wall of the screw rod (6); the first trapezoidal block (9) is fixedly connected to one end of the sleeve (8) and matches with the two second trapezoidal blocks (10); a groove is provided on one side of the shaft body (2); one end of the screw rod (6) passes through one side of the cavity and extends to the inside of the groove; the knob (5) is fixedly connected to one end of the screw rod (6) and is located inside the groove.

3. The desalted water pump for a steam turbine unit in a thermal power plant according to claim 2, characterized in that: The inclined surfaces of the two second trapezoidal blocks (10) are both provided with T-shaped grooves, and T-shaped blocks (7) are slidably arranged inside the two T-shaped grooves. The two T-shaped blocks (7) are respectively fixedly connected to the two inclined surfaces of the first trapezoidal block (9).

4. The desalted water pump for a steam turbine unit in a thermal power plant according to claim 1, characterized in that: A mounting hole is provided on one side of the U-shaped scraper (4), and the mounting hole matches the shaft body (2).

5. The desalted water pump for a steam turbine unit in a thermal power plant according to claim 4, characterized in that: Two fixing grooves are provided on the inner side of the mounting hole, and the two fixing grooves are matched with corresponding second trapezoidal blocks (10) respectively.

6. The desalted water pump for a steam turbine unit in a thermal power plant according to claim 2, characterized in that: A hexagonal groove is formed on one side of the knob (5).

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