Protective device of steam turbine

Abstract

The utility model discloses a protecting device of a steam turbine, which comprises an oil tank, an oil tank cover, an oil inlet pipe, an oil outlet pipe, a filter plate, a filter bag and a cleaning device. Then the connecting mechanism drives four sets of cleaning plates and cleaning brushes below to sweep scrap iron in the filter plate, meanwhile, the scrap iron is adsorbed through magnetic suction plates on the left side and the right side of each set of cleaning plates, and then the cleaning effect on the filter plate is improved; and therefore, the connecting stability between the driving shaft and the rotating seat is improved, and meanwhile, the rotating seat and the fixing rod can be quickly disassembled conveniently and quickly.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine oil tanks, in particular to a protective device for a steam turbine. Background Art

[0002] A steam turbine is a heavy machine that uses steam as a power source and converts the thermal energy of steam into mechanical energy. It is the most widely used prime mover in modern thermal power plants. As a part of the steam turbine device, the steam turbine oil tank is mainly used to store system oil. The existing filter of the steam turbine oil tank is prone to blockage and often requires manual cleaning. Cleaning is not only time-consuming and labor-intensive, but also has the disadvantage of being difficult to clean, and residues are likely to occur. If it is not cleaned thoroughly for a long time, it will affect the filtering function in the steam turbine oil tank.

[0003] For example, the publication number CN202320605285.6 discloses "A Steam Turbine Protection Device". The motor, rotating shaft, first gear and second gear in the cleaning structure can drive the rotating rod and the cleaning brush to rotate. The cleaning brush will brush the surface of the filter to prevent ferromagnetic impurities from clogging the filter and affecting the filtering function in the oil tank. The second connecting plate and the magnet rotate synchronously with the rotating rod, and the magnet can absorb the ferromagnetic impurities on the surface of the filter.

[0004] The above-mentioned method achieves the adsorption of iron filings inside the filter by the contact between the magnet and the surface of the filter, but the long-term contact and friction between the magnet and the surface of the filter will cause wear on the filter, and the model of the above-mentioned cleaning brush is relatively single, so when different types of cleaning brushes need to be replaced, it is not convenient to disassemble and replace, which is not conducive to the cleaning effect of the filter. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a protective device for a steam turbine, which solves the above-mentioned problems.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented through the following technical solutions: a protective device for a steam turbine, comprising an oil tank, an oil tank cover, an oil inlet pipe, an oil outlet pipe, a filter plate, a filter bag and a cleaning device, wherein the top of the oil tank is installed with an oil tank cover, the left side of the top of the oil tank cover is provided with an oil inlet pipe, the lower side of the right end of the oil tank is provided with an oil outlet pipe, the filter plate is installed at the middle part of the inner side of the oil tank, the bottom of the oil inlet pipe is connected to the filter bag, the cleaning device is installed at the middle part of the top of the oil tank cover, and the The cleaning device includes a motor box, a drive motor, a drive shaft, a connecting mechanism, a cleaning plate, a cleaning brush and a magnetic plate. The drive motor is installed inside the motor box, and the output end of the drive motor is connected to the upper end of the drive shaft by a coupling. The inner side of the lower end of the drive shaft is threadedly matched with the upper end of the connecting mechanism. The right end of the connecting mechanism is fixed to the cleaning plate, a cleaning brush is installed at the bottom of the cleaning plate, a magnetic plate is installed at the middle of the front end of the cleaning plate, and the motor box is installed at the middle of the top end of the fuel tank cover.

[0009] Preferably, the connection mechanism includes a rotating seat, a fixed rod and a fixed groove, a fixed rod is fixed to the top of the rotating seat, the upper end of the fixed rod is threadedly engaged with the inner side of the lower end of the fixed groove, the right end of the rotating seat is fixed to the cleaning plate, and the fixed groove is arranged on the inner side of the lower end of the driving shaft.

[0010] Preferably, the driving motor, the driving shaft and the connecting mechanism are vertically distributed along the upper end of the filter plate, so as to facilitate the rotational movement of the connecting mechanism by vertically adjusting the driving motor.

[0011] Preferably, a group of cleaning plates are fixed to each of the four sides of the connection mechanism, and the four groups of cleaning plates are arranged in groups of two in a mirror-image distribution with the middle of the connection mechanism as the center.

[0012] Preferably, a group of magnetic plates are respectively provided at the left and right ends of the cleaning plate, and the two groups of magnetic plates are symmetrically arranged along the middle of the left and right ends of the cleaning plate, so that the adsorption of iron filings on the filter plate is enhanced by cooperating with the cleaning plate through multiple groups of magnetic plates.

[0013] Preferably, the head of the cleaning plate is arranged in an arc shape, and the lateral length of the two groups of cleaning plates and the connecting mechanism is consistent with the inner side of the oil tank, so that when the connecting mechanism drives the four groups of cleaning plates to rotate, it will not cause damage to the inside of the oil tank.

[0014] Preferably, threads are provided on the outer side of the fixing rod and the inner side of the lower end of the fixing groove, and the fixing rod and the fixing groove are threadedly fixed to each other through the threads, thereby increasing the connection stability between the driving shaft and the fixing rod.

[0015] Preferably, the fixing rod is made of stainless steel and has good toughness.

[0016] (III) Beneficial effects

[0017] The utility model provides a protective device for a steam turbine, which has the following beneficial effects: by setting a cleaning device, the driving motor drives the driving shaft to make the connection mechanism rotate synchronously, and then the connection mechanism brings four groups of cleaning plates and the cleaning brushes below to clean the iron filings inside the filter plate, and at the same time, the magnetic suction plates on the left and right sides of each group of cleaning plates adsorb the iron filings, thereby increasing the cleaning effect of the filter plate.

[0018] The utility model provides a protective device for a steam turbine, which has the following beneficial effects: by setting a connection mechanism, the threaded locking effect between the fixing rod and the fixing groove is used to improve the connection stability between the drive shaft and the rotating seat, and the rotating seat and the fixing rod can be quickly disassembled conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the planar structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the planar structure of the cleaning device of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the cleaning device of the utility model from a top view;

[0023] Figure 5 It is a schematic diagram of the planar structure of the connection mechanism of the utility model.

[0024] In the figure: oil tank 1, oil tank cover 2, oil inlet pipe 3, oil outlet pipe 4, filter plate 5, filter bag 6, cleaning device 7, motor box 71, drive motor 72, drive shaft 73, connecting mechanism 74, cleaning plate 75, cleaning brush 76, magnetic plate 77, rotating seat 741, fixing rod 742, fixing groove 743. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1 and 2The utility model provides a technical solution for a protective device of a steam turbine: a protective device of a steam turbine, comprising an oil tank 1, an oil tank cover 2, an oil inlet pipe 3, an oil outlet pipe 4, a filter plate 5, a filter bag 6 and a cleaning device 7, the oil tank cover 2 is installed at the top of the oil tank 1, the oil inlet pipe 3 is arranged on the left side of the top of the oil tank cover 2, the oil outlet pipe 4 is arranged on the lower side of the right end of the oil tank 1, the filter plate 5 is installed in the middle of the inner side of the oil tank 1, the bottom of the oil inlet pipe 3 is connected to the filter bag 6, and the cleaning device 7 is installed in the middle of the top of the oil tank cover 2.

[0027] See also Figure 3 and 4 The utility model provides a technical solution for a protective device of a steam turbine: a protective device of a steam turbine, the cleaning device 7 comprises a motor box 71, a drive motor 72, a drive shaft 73, a connection mechanism 74, a cleaning plate 75, a cleaning brush 76 and a magnetic plate 77. The drive motor 72 is installed inside the motor box 71, and the output end of the drive motor 72 is connected to the upper end of the drive shaft 73 by a coupling. The inner side of the lower end of the drive shaft 73 is threadedly matched with the upper end of the connection mechanism 74, and the right end of the connection mechanism 74 is fixed to the cleaning plate 75. A cleaning brush 76 is installed at the bottom of the cleaning plate 75, and a magnetic plate 77 is installed at the middle of the front end of the cleaning plate 75. The motor box 71 is installed at the middle of the top end of the oil tank cover 2, and the drive motor 72, the drive shaft 73 and the connection mechanism 74 are connected along the upper end of the filter plate 5. The ends are arranged in a vertical distribution, so that it is convenient to vertically adjust the connecting mechanism 74 by driving the motor 72 to rotate. A group of cleaning plates 75 are fixed on each of the four sides of the connecting mechanism 74, and the four groups of cleaning plates 75 are arranged in a mirror distribution in pairs with the middle of the connecting mechanism 74 as the center. Preferably, a group of magnetic suction plates 77 are respectively arranged at the left and right ends of the cleaning plate 75, and the two groups of magnetic suction plates 77 are symmetrically arranged along the middle of the left and right ends of the cleaning plate 75, so that the iron filings on the filter plate 5 are adsorbed by multiple groups of magnetic suction plates 77 in cooperation with the cleaning plate 75. The head of the cleaning plate 75 is arranged in an arc shape, and the lateral length of the two groups of cleaning plates 75 and the connecting mechanism 74 is consistent with the inner side of the fuel tank 1, so that when the connecting mechanism 74 drives the four groups of cleaning plates 75 to rotate, it will not cause damage to the inside of the fuel tank 1.

[0028] See also Figure 5The utility model provides a technical solution for a protective device of a steam turbine: a protective device of a steam turbine, a connection mechanism 74 includes a rotating seat 741, a fixing rod 742 and a fixing groove 743, a fixing rod 742 is fixed to the top of the rotating seat 741, the upper end of the fixing rod 742 is threadedly matched with the inner side of the lower end of the fixing groove 743, the right end of the rotating seat 741 is fixed to the cleaning plate 75, the fixing groove 743 is arranged on the inner side of the lower end of the driving shaft 73, the outer side of the fixing rod 742 and the inner side of the lower end of the fixing groove 743 are both provided with threads, and the fixing rod 742 and the fixing groove 743 are threadedly fixed by threads, thereby increasing the connection stability between the driving shaft 73 and the fixing rod 742, and the fixing rod 742 is made of stainless steel and has good toughness.

[0029] When in use, the oil and water are fed into the oil inlet pipe 3, and then the oil and water are initially filtered through the filter bag 6 at the bottom of the oil inlet pipe 3, and the impurities and particulates carried in the oil and water are intercepted;

[0030] After the oil and water are filtered, they contact the filter plate 5, and the filter plate 5 completes the secondary filtration of the oil and water, and intercepts the iron filings and remaining impurities carried in the oil and water. The filtered oil and water are then discharged from the oil outlet pipe 4 and transmitted to the next location;

[0031] At the same time, the driving motor 72 drives the driving shaft 73 to make the fixed rod 742 rotate synchronously, and then the fixed rod 742 drives the rotating seat 741 to rotate synchronously, and indirectly makes the rotating seat 741 rotate synchronously with the four groups of cleaning plates 75 and the cleaning brushes 76 below, and the cleaning brushes 76 clean the iron filings inside the filter plate 5 and sweep them out. While the cleaning brushes 76 sweep out the iron filings, the magnetic suction plates 77 on the left and right sides of each group of cleaning plates 75 simultaneously absorb the swept iron filings, thereby increasing the cleaning effect of the filter plate 5;

[0032] In addition, the threaded locking effect between the fixing rod 742 and the fixing groove 743 improves the connection stability between the driving shaft 73 and the rotating seat 741. At the same time, the rotating seat 741 and the fixing rod 742 can be quickly disassembled to facilitate timely replacement of the required rotating seat 741 and cleaning plate 75 to improve the cleaning effect of the filter plate 5.

[0033] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and wiring arrangement in detail.

[0034] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protection device for a steam turbine, comprising an oil tank (1), an oil tank cover (2), an oil inlet pipe (3), an oil outlet pipe (4), a filter plate (5) and a filter bag (6), wherein the top of the oil tank (1) is provided with the oil tank cover (2), the left side of the top of the oil tank cover (2) is provided with the oil inlet pipe (3), the lower side of the right end of the oil tank (1) is provided with the oil outlet pipe (4), the filter plate (5) is installed at the middle part of the inner side of the oil tank (1), and the bottom of the oil inlet pipe (3) is connected to the filter bag (6); Features: The invention also comprises a cleaning device (7), which is installed at the middle of the top end of the fuel tank cover (2). The cleaning device (7) comprises a motor box (71), a driving motor (72), a driving shaft (73), a connecting mechanism (74), a cleaning plate (75), a cleaning brush (76) and a magnetic plate (77). The driving motor (72) is installed inside the motor box (71). The output end of the driving motor (72) is connected to the upper end of the driving shaft (73) by a coupling. The inner side of the lower end of the driving shaft (73) is threadedly matched with the upper end of the connecting mechanism (74). The right end of the connecting mechanism (74) is fixed to the cleaning plate (75). The bottom of the cleaning plate (75) is installed with a cleaning brush (76). The middle of the front end of the cleaning plate (75) is installed with a magnetic plate (77). The motor box (71) is installed at the middle of the top end of the fuel tank cover (2).

2. A steam turbine protection device according to claim 1, characterized in that: The connection mechanism (74) comprises a rotating seat (741), a fixing rod (742) and a fixing groove (743); the fixing rod (742) is fixed to the top end of the rotating seat (741); the upper end of the fixing rod (742) is threadedly engaged with the inner side of the lower end of the fixing groove (743); the right end of the rotating seat (741) is fixed to the cleaning plate (75); and the fixing groove (743) is arranged on the inner side of the lower end of the driving shaft (73).

3. A steam turbine protection device according to claim 1, characterized in that: The driving motor (72), the driving shaft (73) and the connecting mechanism (74) are arranged in a vertical distribution along the upper end of the filter plate (5).

4. A steam turbine protection device according to claim 1, characterized in that: A group of cleaning plates (75) are fixed to each of the four sides of the connection mechanism (74), and the four groups of cleaning plates (75) are arranged in pairs in a mirror-image distribution with the middle of the connection mechanism (74) as the center.

5. A steam turbine protection device according to claim 1, characterized in that: A group of magnetic attraction plates (77) are respectively arranged at the left and right ends of the cleaning plate (75), and the two groups of magnetic attraction plates (77) are symmetrically arranged along the middle parts of the left and right ends of the cleaning plate (75).

6. A steam turbine protection device according to claim 1, characterized in that: The head of the cleaning plate (75) is arranged in an arc shape, and the transverse length of the two groups of cleaning plates (75) and the connecting mechanism (74) is consistent with the inner side of the oil tank (1).

7. A steam turbine protection device according to claim 2, characterized in that: The outer side of the fixing rod (742) and the inner side of the lower end of the fixing groove (743) are both provided with threads, and the fixing rod (742) and the fixing groove (743) are screw-fixed with each other through the threads.

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