Suspended abrasive modified water jet device and method for equipment deicing

Abstract

The invention provides a suspended abrasive modified water jet device for equipment deicing, which comprises a water tank, a mechanical rotary stirrer is arranged in the water tank, a modifier feed hopper, an abrasive feed hopper and a water source inlet are arranged on the water tank, the water tank is connected with a supercharging device through a first high-pressure rubber hose, and the supercharging device is connected with a jet pump through a second high-pressure rubber hose. The jet pump is connected with a jet nozzle through a third high-pressure rubber pipe, and the jet nozzle is fixed to a nozzle support. The invention further provides a suspended abrasive modified water jet method for equipment deicing. The modifier and the abrasive are added by arranging the modifier and the abrasive feeding hopper to form stable and modified suspended abrasive slurry jet flow, the jet flow form enlarges the effective distance of the jet flow and the effective depth of ice breaking, the viscosity and the elasticity of liquid after the modifier is added are remarkably enhanced, and after the jet flow impacts an ice body, the stability of the jet flow is improved. The suspended abrasive slurry under the low shearing force carries the crushed ice to slide to the ground, and liquid drops cannot be formed to cause secondary icing.

Description

Technical Field

[0001] The invention relates to the technical field of equipment deicing, and in particular to a suspended abrasive modified water jet device and method for equipment deicing. Background Art

[0002] When power equipment is exposed to the natural environment for a long time, under suitable temperature and humidity conditions, its surface may form icing such as rime, rime and mixed rime, which has a significant impact on the electrical insulation and mechanical support performance of the equipment. For example, severe icing can cause ice bridging, change the electric field distribution of the external insulation, and thus reduce the electrical strength of the insulating components of the power equipment. When the weight of the icing exceeds the rated load-bearing capacity of the equipment, it may also cause problems such as structural fracture, thereby affecting the safe and stable operation of the power system. Existing deicing methods such as insulator sheds and fan blades mainly use mechanical deicing, natural passive deicing, laser deicing and other means, but these means have problems such as low deicing efficiency and high cost. Water jet deicing is a long-distance non-contact deicing method, but the inventor of this application has found through research that pure water jets are prone to diffusion under long-distance non-contact conditions and have low striking force; in the process of breaking the icing, severely atomized pure water jets are prone to form secondary icing at other locations; after breaking the icing, the residual water droplets on the surface of the equipment are prone to rapid secondary freezing in a low temperature environment. Summary of the invention

[0003] In view of the technical problems that the existing pure water jet deicing is prone to diffusion under long-distance non-contact conditions, resulting in low striking force, the severely atomized pure water jet is prone to secondary ice coating in other positions during the ice-breaking process, and the residual water droplets on the surface of the equipment after ice-breaking are prone to rapid secondary freezing in a low-temperature environment, the present invention provides a suspended abrasive modified water jet device for equipment deicing.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A suspended abrasive modified water jet device for deicing equipment comprises a water tank, a mechanical rotating agitator is arranged in the water tank, a modifier feed hopper, an abrasive feed hopper and a water source inlet are arranged on the water tank, the water tank is connected to a booster device through a first high-pressure rubber hose, the booster device is connected to a jet pump through a second high-pressure rubber hose, the jet pump is connected to a jet nozzle through a third high-pressure rubber hose, and the jet nozzle is fixed on a nozzle bracket.

[0006] Furthermore, the modifier feed hopper is a polyacrylamide feed hopper, and the abrasive feed hopper is a walnut shell feed hopper.

[0007] Furthermore, an ice particle feed hopper is fixedly connected to the jet pump, and a rotating ice breaker is arranged in the ice particle feed hopper.

[0008] Furthermore, the jet nozzle includes a nozzle shell and a nozzle liner, the nozzle liner is arranged inside the nozzle shell and has a smooth contact surface, a protrusion is provided on the surface of the nozzle liner, and a corresponding L-shaped slot for cooperating with the movement of the protrusion is opened on the nozzle shell. The nozzle shell is stretched after rotating along the nozzle liner, so that a cavity is formed between the nozzle shell and the nozzle liner, and the jet nozzle is changed from a conical convergent nozzle to a self-excited oscillation pulse jet nozzle.

[0009] The present invention also provides a suspended abrasive modified water jet method for deicing equipment, wherein the method adopts the aforementioned suspended abrasive modified water jet device for deicing equipment, and the method comprises the following steps:

[0010] S1. Turn on the water source, and the water enters the water tank through the water source inlet;

[0011] S2. When the water tank is full of water, add PAM additive through the modifier feed hopper, then start the mechanical rotary stirrer for stirring, and when the PAM additive is stirred evenly, add walnut shells of 20 to 40 mesh through the abrasive feed hopper for stirring, and finally form a stable modified suspended abrasive slurry;

[0012] S3, starting the booster device, the suspended abrasive slurry in the water tank is pressurized by the booster device, passes through the second high-pressure hose, the jet pump and the third high-pressure hose in sequence, enters the jet nozzle, and finally is accelerated by the jet nozzle to form a jet impact device to cover ice.

[0013] Furthermore, the method also includes adding crushed ice collected on site through an ice particle feed hopper on the jet pump, starting a rotary ice breaker in the ice particle feed hopper to break the crushed ice into 15-25 mesh ice particles, and then sucking them in through negative pressure of the jet pump, mixing them with the fluid in the second high-pressure hose in the jet pump to form a pre-mixed ice particle abrasive jet that passes through the jet nozzle to flush and break the ice covering the equipment.

[0014] Furthermore, step S3 also includes stretching the nozzle shell by rotating it along the nozzle inner shell, so that a cavity is formed between the nozzle shell and the nozzle inner shell, and the jet nozzle is changed from a conical convergent nozzle to a self-excited oscillating pulse jet nozzle. The high-speed oscillation of the water jet of the nozzle causes cracks to form quickly in the ice covering the equipment.

[0015] Compared with the prior art, the suspended abrasive modified water jet device and method for equipment deicing provided by the present invention have the following advantages: 1) by setting a modifier feed hopper to add a modifier such as PAM additives and an abrasive feed hopper to add abrasives such as walnut shells, a stable modified suspended abrasive slurry jet is formed. This jet form expands the effective distance of the jet and the effective depth of ice crushing. On the other hand, the viscosity and elasticity of the liquid after adding the PAM additive are significantly enhanced. When the jet impacts the ice body, the suspended abrasive slurry under low shear force with enhanced viscoelasticity slides to the ground with the crushed ice, that is, the liquid slides off the surface of the equipment as a whole, and no droplets are formed to cause secondary freezing, thereby solving the problems of high labor intensity of existing deicing, jet atomization and diffusion under long-distance contactless conditions, and secondary freezing of residual water droplets on the surface of the equipment; 2) An ice particle feeding hopper is fixedly connected to the jet pump, and a rotating ice breaker is arranged in the ice particle feeding hopper to form an ice particle adding device. When the abrasive of the jet device is exhausted after a long period of operation outside, crushed ice is put into the ice particle adding device on the spot to form an ice particle abrasive jet, thereby improving the working efficiency of the water jet; 3) a protrusion is arranged on the surface of the nozzle inner shell, and an L-shaped slot for cooperating with the movement of the protrusion is correspondingly opened on the nozzle shell, so that the nozzle shell can be stretched after rotating along the nozzle inner shell, so that a cavity is formed between the nozzle shell and the nozzle inner shell, and the jet nozzle is changed from a conventional conical convergent nozzle to a self-excited oscillation pulse jet nozzle. The high-speed oscillation of the nozzle water jet causes cracks to form quickly in the ice covered equipment. This is particularly suitable when the jet distance is far or the equipment is covered with thick ice and the flushing time is long, and the conical convergent nozzle is difficult to form effective ice crushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a suspended abrasive modified water jet device for deicing equipment provided by the present invention.

[0017] Figure 2 It is a cross-sectional schematic diagram of the jet nozzle provided by the present invention.

[0018] Figure 3 It is a schematic external view of the jet nozzle provided by the present invention.

[0019] In the figure, 1. water tank; 2. mechanical rotary agitator; 3. modifier feed hopper; 4. abrasive feed hopper; 5. water source inlet; 6. first high-pressure hose; 7. booster device; 8. second high-pressure hose; 9. jet pump; 10. third high-pressure hose; 11. jet nozzle; 111. nozzle housing; 112. nozzle liner; 113. protrusion; 114. L-shaped slot; 12. nozzle bracket; 13. jet; 14. equipment icing; 15. ice particle feed hopper; 16. rotary ice breaker. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0021] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Please refer to Figure 1 As shown, the present invention provides a suspended abrasive modified water jet device for equipment deicing, comprising a water tank 1, a mechanical rotary stirrer 2 is arranged in the water tank 1, a modifier feed hopper 3, an abrasive feed hopper 4 and a water source inlet 5 are arranged on the water tank 1, the water tank 1 is connected to a booster 7 through a first high-pressure hose 6, the booster 7 is connected to a jet pump 9 through a second high-pressure hose 8, the jet pump 9 is connected to a jet nozzle 11 through a third high-pressure hose 10, and the jet nozzle 11 is fixed on a nozzle bracket 12. Among them, the modifier feed hopper 3 is used to add a modifier, the abrasive feed hopper 4 is used to add abrasive, the water source inlet 5 is used to add water, the mechanical rotary stirrer 2 is used to fully stir the added water with the modifier and the abrasive to form a suspended abrasive slurry, and then after being pressurized by the booster 7, the jet 13 is formed by the jet pump 9 and accelerated by the jet nozzle 11 to impact the equipment ice 14 such as insulator ice.

[0024] As a specific embodiment, the modifier feed hopper 3 is a polyacrylamide feed hopper, that is, the modifier added by the modifier feed hopper 3 is polyacrylamide (PAM), the abrasive feed hopper 4 is a walnut shell feed hopper, and the abrasive added by the abrasive feed hopper 4 is walnut shell. The polyacrylamide and walnut shell are fully stirred and mixed with the added water by the mechanical rotating stirrer 2 to form a suspended abrasive slurry, which can be pre-mixed or mixed on site according to the construction situation.

[0025] As a specific example, please refer to Figure 1 As shown, an ice particle feed hopper 15 is fixedly connected to the jet pump 9, and a rotary ice breaker 16 is arranged in the ice particle feed hopper 15. The ice particle feed hopper 15 and the rotary ice breaker 16 together constitute an ice particle adding device. Therefore, when the abrasive of the jet device is exhausted after a long period of operation outside, the crushed ice washed down or around the environment can be collected on the spot into the ice particle feed hopper 15, and the rotary ice breaker 16 is started to break the crushed ice into fine ice particles of about 20 meshes, which are sucked in by the negative pressure of the jet pump 9 and mixed with the fluid in the second high-pressure hose 12 in the jet pump 6 to form a pre-mixed ice particle abrasive jet to wash and break the ice covering the equipment.

[0026] As a specific example, please refer to Figure 2 and Figure 3 As shown, the jet nozzle 11 comprises a nozzle housing 111 and a nozzle liner 112, wherein the nozzle liner 112 is arranged inside the nozzle housing 111 and has a smooth contact surface, a protrusion 113 is arranged on the surface of the nozzle liner 112, and the protrusion 113 can be specifically set as a square protrusion, etc., and an L-shaped card slot 114 for matching the movement of the protrusion 113 is correspondingly opened on the nozzle housing 111, that is, the protrusion 113 can move relatively in the L-shaped card slot 114, and the nozzle housing 111 can rotate rightward along the nozzle liner 112 and then move back. The jet direction is stretched (at this time, the protrusion 113 moves relatively from the short side groove of the L-shaped slot 114 to the long side groove of the L-shaped slot 114), so that a cavity is formed between the nozzle shell 111 and the nozzle liner 112, and the jet nozzle 11 is changed from a conventional conical convergent nozzle to a self-excited oscillation pulse jet nozzle. The high-speed oscillation of the nozzle water jet causes cracks to form quickly in the ice covering the equipment, and the jet carries the crushed ice to slide to the ground. There is no liquid residue on the surface of the equipment, and no droplets are formed to cause secondary freezing, thereby improving the working efficiency of the water jet.

[0027] Please refer to Figure 1 As shown, the present invention also provides a suspended abrasive modified water jet method for deicing equipment, wherein the method adopts the aforementioned suspended abrasive modified water jet device for deicing equipment, and the method comprises the following steps:

[0028] S1, turn on the water source, and the water source enters the water tank 1 through the water source inlet 5;

[0029] S2, when the water tank 1 is full of water, add PAM additive through the modifier feed hopper 3, then start the mechanical rotary stirrer 2 for stirring, and when the PAM additive is stirred evenly, add walnut shells of 20 to 40 mesh through the abrasive feed hopper 4 for stirring, and finally form a stable modified suspended abrasive slurry;

[0030] S3, start the booster device 7, the suspended abrasive slurry in the water tank 1 is pressurized by the booster device 7, and then passes through the second high-pressure hose 8, the jet pump 9 and the third high-pressure hose 10 in sequence and enters the jet nozzle 11, and finally is accelerated by the jet nozzle 11 to form a jet impact device to cover the ice. After the jet impacts the ice body, the viscoelasticity of the suspended abrasive slurry under low shear force is enhanced, and the slurry slides from the surface of the device to the ground with crushed ice, and no droplets are formed to cause secondary freezing.

[0031] As a specific example, please refer to Figure 1 As shown, when the abrasive of the jet device is exhausted after a long period of operation outside, the method further includes adding crushed ice collected on site through the ice particle feed hopper 15 on the jet pump 9, starting the rotary ice breaker 16 in the ice particle feed hopper 15 to break the crushed ice into 15-25 mesh ice particles, which are then sucked in by negative pressure through the jet pump 9 and mixed with the fluid in the second high-pressure hose 8 in the jet pump 9 to form a pre-mixed ice particle abrasive jet that passes through the jet nozzle 11 to flush and break the ice covering the equipment.

[0032] As a specific example, please refer to Figure 2 and Figure 3 As shown, the step S3 also includes, when the jet distance is far or the equipment is covered with thick ice and takes a long time to flush, the nozzle housing 111 is stretched in the jet direction by rotating right along the nozzle inner shell 112 (at this time, the protrusion 113 moves relatively from the short side groove of the L-shaped slot 114 to the long side groove of the L-shaped slot 114), so that a cavity is formed between the nozzle housing 111 and the nozzle inner shell 112, and the jet nozzle 11 is changed from a conventional conical convergent nozzle to a self-excited oscillation pulse jet nozzle. The high-speed oscillation of the water jet of the nozzle causes cracks to form quickly in the ice covering the equipment, thereby improving the working efficiency of the water jet.

[0033] Compared with the prior art, the suspended abrasive modified water jet device and method for equipment deicing provided by the present invention have the following advantages: 1) by setting a modifier feed hopper to add a modifier such as PAM additives and an abrasive feed hopper to add abrasives such as walnut shells, a stable modified suspended abrasive slurry jet is formed. This jet form expands the effective distance of the jet and the effective depth of ice crushing. On the other hand, the viscosity and elasticity of the liquid after adding the PAM additive are significantly enhanced. When the jet impacts the ice body, the suspended abrasive slurry under low shear force with enhanced viscoelasticity slides to the ground with the crushed ice, that is, the liquid slides off the surface of the equipment as a whole, and no droplets are formed to cause secondary freezing, thereby solving the problems of high labor intensity of existing deicing, jet atomization and diffusion under long-distance contactless conditions, and secondary freezing of residual water droplets on the surface of the equipment; 2) An ice particle feeding hopper is fixedly connected to the jet pump, and a rotating ice breaker is arranged in the ice particle feeding hopper to form an ice particle adding device. When the abrasive of the jet device is exhausted after a long period of operation outside, crushed ice is put into the ice particle adding device on the spot to form an ice particle abrasive jet, thereby improving the working efficiency of the water jet; 3) a protrusion is arranged on the surface of the nozzle inner shell, and an L-shaped slot for cooperating with the movement of the protrusion is correspondingly opened on the nozzle shell, so that the nozzle shell can be stretched after rotating along the nozzle inner shell, so that a cavity is formed between the nozzle shell and the nozzle inner shell, and the jet nozzle is changed from a conventional conical convergent nozzle to a self-excited oscillation pulse jet nozzle. The high-speed oscillation of the nozzle water jet causes cracks to form quickly in the ice covered equipment. This is particularly suitable when the jet distance is far or the equipment is covered with thick ice and the flushing time is long, and the conical convergent nozzle is difficult to form effective ice crushing.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A suspended abrasive modified water jet device for deicing equipment, characterized in that: It includes a water tank, in which a mechanical rotating agitator is arranged, and a modifier feed hopper, an abrasive feed hopper and a water source inlet are arranged on the water tank. The water tank is connected to a booster device through a first high-pressure rubber hose, and the booster device is connected to a jet pump through a second high-pressure rubber hose. The jet pump is connected to a jet nozzle through a third high-pressure rubber hose, and the jet nozzle is fixed on a nozzle bracket.

2. The suspended abrasive modified water jet device for equipment deicing according to claim 1, characterized in that: The modifier feed hopper is a polyacrylamide feed hopper, and the abrasive feed hopper is a walnut shell feed hopper.

3. The suspended abrasive modified water jet device for equipment deicing according to claim 1, characterized in that: The jet pump is fixedly connected with an ice particle feed hopper, and a rotary ice breaker is arranged in the ice particle feed hopper.

4. The suspended abrasive modified water jet device for equipment deicing according to claim 1, characterized in that: The jet nozzle includes a nozzle shell and a nozzle liner. The nozzle liner is arranged inside the nozzle shell and has a smooth contact surface. A protrusion is provided on the surface of the nozzle liner. A corresponding L-shaped slot for cooperating with the movement of the protrusion is opened on the nozzle shell. The nozzle shell is stretched after being rotated along the nozzle liner, so that a cavity is formed between the nozzle shell and the nozzle liner. The jet nozzle is changed from a conical convergent nozzle to a self-excited oscillation pulse jet nozzle.

5. A suspended abrasive modified water jet method for deicing equipment, characterized in that: The method adopts a suspended abrasive modified water jet device for equipment deicing according to any one of claims 1 to 4, and the method comprises the following steps: S1. Turn on the water source, and the water enters the water tank through the water source inlet; S2. When the water tank is full of water, add PAM additive through the modifier feed hopper, then start the mechanical rotary stirrer for stirring, and when the PAM additive is stirred evenly, add walnut shells of 20 to 40 mesh through the abrasive feed hopper for stirring, and finally form a stable modified suspended abrasive slurry; S3, starting the booster device, the suspended abrasive slurry in the water tank is pressurized by the booster device, passes through the second high-pressure hose, the jet pump and the third high-pressure hose in sequence, enters the jet nozzle, and finally is accelerated by the jet nozzle to form a jet impact device to cover ice.

6. The suspended abrasive modified water jet method for equipment deicing according to claim 5, characterized in that: The method further includes adding crushed ice collected on site through an ice particle feed hopper on the jet pump, starting a rotary ice breaker in the ice particle feed hopper to break the crushed ice into 15-25 mesh ice particles, and then sucking the crushed ice through negative pressure of the jet pump, mixing it with the fluid in the second high-pressure hose in the jet pump, forming a pre-mixed ice particle abrasive jet that passes through the jet nozzle to flush and break the ice covering the equipment.

7. The suspended abrasive modified water jet method for equipment deicing according to claim 5, characterized in that: The step S3 also includes stretching the nozzle shell by rotating it along the nozzle inner shell, so that a cavity is formed between the nozzle shell and the nozzle inner shell, and the jet nozzle is changed from a conical convergent nozzle to a self-excited oscillating pulse jet nozzle. The high-speed oscillation of the water jet of the nozzle causes cracks to form quickly in the ice covering the equipment.

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