Surface coating detection device for dry ice cleaning system of hydro-generator

Abstract

The utility model discloses a surface coating detection device for a dry ice cleaning system of a hydro-generator, which is characterized in that a clamping groove is formed in one side of a base, and a clamping device is arranged in the clamping groove and is matched with a piece to be detected in an abutting manner; an inverted trapezoidal chute is formed in the upper surface of the base, a slider is slidably connected to the inner wall of the chute, and an electronic tension meter is connected to the top of the slider; one end of the electronic tension meter is connected with a hook, and the other end is connected with the stretching mechanism; the stretching mechanism comprises a support connected with the side surface of the base, the upper surface of the support is connected with a miniature winder, and a pull rope is wound on the surface of the miniature winder and wound around a fixed pulley block to be connected with one end of an electronic tension meter. The device solves the problem that when a stator and a rotor of a hydro-generator in the prior art are subjected to dry ice cleaning, whether the dry ice cleaning can cause damage to a surface coating or not and the degree of causing a tail number cannot be determined, and has the advantages that the damage degree of the dry ice cleaning to the coating can be determined in advance through testing; therefore, data support is provided for the cleaning process.

Description

Technical Field

[0001] The utility model belongs to the technical field of power system maintenance, and in particular relates to a surface coating detection device for a dry ice cleaning system of a water turbine generator. Background Art

[0002] During the long-term operation of the generator equipment, the surface of the stator core and winding will be covered with oil stains, which will seriously erode the insulation of the stator winding. The oil stains will also adhere to the ventilation groove of the core with the convection air of the unit, causing the ventilation groove to be blocked, the heat dissipation efficiency to decrease, and in severe cases, the core will overheat and burn the generator. Therefore, after a period of operation, the generator needs to be cleaned; unlike traditional cleaning, dry ice cleaning is an emerging environmentally friendly cleaning technology. Dry ice cleaning uses dry ice particles driven by high-speed airflow to remove surface dirt. The sprayed dry ice particles are instantly vaporized, leaving no residue and no pollution. It has the characteristics of thorough cleaning, small space required, high reliability, and short cleaning time. At present, dry ice cleaning technology has been widely used in many industries, but it has no mature application in the cleaning of stators and rotors of hydro-turbine generators; the surface of the stator and rotor of the hydro-turbine generator is coated with a special coating, so before applying dry ice cleaning, coating detection is required to ensure the appropriate dry ice spray flow to avoid coating damage. Based on this, it is necessary to design a surface coating detection device for the dry ice cleaning system of the hydro-turbine generator to solve the above problems. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a surface coating detection device for a dry ice cleaning system of a hydro-turbine generator. The device solves the problem that when dry ice cleaning is applied to the stator and rotor of the hydro-turbine generator in the prior art, it is impossible to determine whether dry ice cleaning will cause damage to the surface coating and the extent of the damage. The device has the characteristic of being able to determine the extent of damage caused by dry ice cleaning to the coating in advance through testing, thereby providing data support for the cleaning process.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a surface coating detection device of a dry ice cleaning system for a hydro-turbine generator, comprising a base, a card slot is provided on one side of the base, a clamping device is arranged inside the card slot to cooperate with the workpiece to be tested; an inverted trapezoidal slide groove is provided on the upper surface of the base, a slider is slidably connected to the inner wall of the slide groove, and an electronic tensile gauge is connected to the top of the slider; one end of the electronic tensile gauge is connected to a hook, and the other end is connected to a stretching mechanism.

[0005] Preferably, the clamping device comprises a clamping plate arranged inside the clamping slot, and a side surface of the clamping plate is rotatably connected to one end of the screw rod.

[0006] Preferably, the screw rod and the side surface of the base are provided with an internal threaded hole for threaded fit.

[0007] Further, the other end of the lead screw passes through the base and is connected to a handle for rotation.

[0008] Preferably, the hook is hung on the adhesive film.

[0009] Preferably, the adhesive film includes a circular gasket coated with adhesive, which is bonded to the test piece. A pull ring is connected to one side of the circular gasket and is hung on the hook.

[0010] Preferably, the stretching mechanism includes a bracket connected to the side surface of the base. A micro wire winding machine is connected to the upper surface of the bracket. A pull rope is wound around the surface of the micro wire winding machine. The pull rope bypasses a fixed pulley group and is connected to one end of an electronic tensiometer.

[0011] Further, the micro wire winding machine can be driven by a motor, and a wire winding cylinder is connected to the output end of the motor to implement this structure.

[0012] Further, the fixed pulley group includes a U-shaped bracket, and a pulley is rotatably connected to the upper part of the U-shaped bracket.

[0013] The beneficial effects of the surface coating detection device of the hydrogenerator dry ice cleaning system provided by the present utility model are as follows:

[0014] 1. This device uses a micro wire winding machine driven by a motor to pull the electronic tensiometer, avoiding stress unevenness and mutation caused by manual pulling, and ensuring the accuracy of the test results;

[0015] 2. This device can detect the damage of the coating in any area of the test piece through the cooperation of the electronic tensiometer and the adhesive film. Through the tensile force data feedback by the tensiometer, it can be known at what tensile force the coating peels off, thus providing data support for actual construction. Description of the Drawings

[0016] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0017] Figure 1 is a schematic structural diagram of the present utility model;

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

[0019] In the figure: base 1, card slot 2, clamping plate 21, lead screw 22, chute 4, test piece 3, electronic tensiometer 5, hook 6, adhesive film 7, micro wire winding machine 8, pull rope 81, fixed pulley group 9. Specific Embodiments

[0020] As Figures 1 to 2Among them, the surface coating detection device of the hydrogenerator dry ice cleaning system includes a base 1. A clamping groove 2 is provided on one side of the base 1. A clamping device is arranged inside the clamping groove 2 and is in contact and cooperation with the workpiece to be tested 3. An inverted trapezoidal sliding groove 4 is provided on the upper surface of the base 1. A slider is slidably connected to the inner wall of the sliding groove 4. An electronic tensiometer 5 is connected to the top of the slider. One end of the electronic tensiometer 5 is connected to a hook 6, and the other end is connected to a stretching mechanism.

[0021] Preferably, the clamping device includes a clamping plate 21 arranged inside the clamping groove 2. One side surface of the clamping plate 21 is rotatably connected to one end of a lead screw 22.

[0022] Preferably, the lead screw 22 is in threaded cooperation with an internal threaded hole provided on the side surface of the base 1.

[0023] Further, the other end of the lead screw 22 passes out of the base 1 and is connected with a handle for rotation.

[0024] Preferably, the hook 6 is hung with an adhesive film 7.

[0025] Preferably, the adhesive film 7 includes a circular gasket coated with adhesive and is bonded to the workpiece to be tested 3. A pull ring is connected to one side of the circular gasket and is hung with the hook 6.

[0026] Preferably, the stretching mechanism includes a bracket connected to the side surface of the base 1. A micro wire winding machine 8 is connected to the upper surface of the bracket. A pull rope 81 is wound around the surface of the micro wire winding machine 8. The pull rope 81 bypasses a fixed pulley group 9 and is connected to one end of the electronic tensiometer 5.

[0027] Further, the micro wire winding machine 8 can be driven by a motor. A wire winding cylinder is connected to the output end of the motor to implement this structure.

[0028] Further, the fixed pulley group 9 includes a U-shaped bracket. A pulley is rotatably connected to the upper part of the U-shaped bracket.

[0029] The working principle of the above-mentioned surface coating detection device of the hydrogenerator dry ice cleaning system is as follows:

[0030] During use, first perform timed and quantitative dry ice cleaning on the workpiece to be tested 3, then clamp the workpiece to be tested 3 in the clamping groove 2, paste the adhesive film 7 on the area to be tested of the workpiece to be tested 3, hang the adhesive film 7 through the electronic tensiometer 5, and then start the micro wire winding machine 8 to pull the electronic tensiometer 5 for pulling, test the pulling force when the adhesive film 7 falls off, observe the coating peeling situation after falling off, and the coating damage caused by dry ice cleaning can be obtained, providing data support for subsequent construction.

[0031] The above embodiments are only the preferred technical solutions of the present utility model and should not be regarded as limitations on the present utility model. The embodiments in this application and the features in the embodiments can be arbitrarily combined with each other without conflict. The protection scope of the present utility model shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present utility model.

Claims

1. The surface coating detection device of the dry ice cleaning system of the hydro-generator is characterized by: The invention comprises a base (1), a card slot (2) is provided on one side of the base (1), a clamping device is arranged inside the card slot (2) and is in contact with a test piece (3); an inverted trapezoidal slide groove (4) is provided on the upper surface of the base (1), a slider is slidably connected to the inner wall of the slide groove (4), and an electronic tensile gauge (5) is connected to the top of the slider; one end of the electronic tensile gauge (5) is connected to a hook (6), and the other end is connected to a stretching mechanism.

2. The surface coating detection device of the dry ice cleaning system of a hydro-generator according to claim 1 is characterized in that: The clamping device comprises a clamping plate (21) arranged inside the clamping slot (2), and a surface on one side of the clamping plate (21) is rotatably connected to one end of a screw rod (22).

3. The surface coating detection device of the dry ice cleaning system for a hydro-generator according to claim 2 is characterized by: The screw rod (22) and the side surface of the base (1) are provided with an internal threaded hole for threaded engagement.

4. The surface coating detection device of the dry ice cleaning system for a hydro-generator according to claim 1 is characterized in that: The hook (6) is hooked to the adhesive sheet (7).

5. The surface coating detection device of the dry ice cleaning system for a hydro-generator according to claim 4 is characterized in that: The adhesive sheet (7) comprises a circular gasket coated with adhesive and bonded to the test piece (3), and a pull ring is connected to one side of the circular gasket and is hung with a hook (6).

6. The surface coating detection device of the dry ice cleaning system for a hydro-generator according to claim 1 is characterized by: The stretching mechanism comprises a bracket connected to the side surface of the base (1), the upper surface of the bracket being connected to a micro-winding machine (8), the surface of the micro-winding machine (8) being wound with a pull rope (81), the pull rope (81) passing through a fixed pulley block (9) and connected to one end of an electronic tension meter (5).

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