A suspended abrasive modified waterjet device and method for de-icing equipment

Abstract

The application provides a suspended abrasive modified water jet device for equipment deicing, comprising a water tank, a mechanical rotary stirrer arranged in the water tank, a modifier feeding hopper, an abrasive feeding hopper and a water source inlet arranged on the water tank, a pressurizing device connected to the water tank through a first high-pressure rubber pipe, a jet pump connected to the pressurizing device through a second high-pressure rubber pipe, and a jet nozzle connected to the jet pump through a third high-pressure rubber pipe, wherein the jet nozzle is fixed on a nozzle support. The application also provides a suspended abrasive modified water jet method for equipment deicing. The application adds a modifier and abrasive through the modifier and abrasive feeding hoppers to form a stable modified suspended abrasive slurry jet, which expands the effective distance of the jet and the effective depth of ice crushing. The liquid viscosity and elasticity are significantly enhanced after adding the modifier, and when the jet impacts the ice, the suspended abrasive slurry under low shear force carries the broken ice to slide to the ground, and does not form liquid drops to cause secondary icing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of device deicing, in particular to a suspended abrasive modified water jet device and method for device deicing. BACKGROUND

[0002] When power equipment is exposed to the natural environment for a long time, under suitable temperature and humidity conditions, rain, rime and mixed rime may form on the surface of the equipment, which has a significant impact on the electrical insulation and mechanical support performance of the equipment. For example, severe icing may cause ice to bridge, change the electric field distribution of the external insulation, and thus reduce the electrical strength of the insulation components of the power equipment. When the weight of the ice exceeds the rated carrying capacity of the equipment, it may also cause structural fracture and other problems, thereby affecting the safe and stable operation of the power system. Existing deicing methods for insulator sheds, fan blades and the like mainly use mechanical deicing, natural passive deicing and laser deicing, but these methods have problems such as low deicing efficiency and high cost. Water jet deicing is a long-distance non-contact deicing method, but the present inventors have found through research that pure water jet is prone to diffusion under long-distance non-contact conditions, and the striking force is low. During the process of breaking ice, the severely atomized pure water jet is prone to form secondary icing at other positions. After breaking the ice, the water droplets remaining on the surface of the equipment are prone to quickly re-ice in a low-temperature environment. SUMMARY

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

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

[0005] A suspended abrasive modified water jet device for deicing equipment, comprising 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, a pressurizing device is connected to the water tank through a first high-pressure rubber pipe, a jet pump is connected to the pressurizing device through a second high-pressure rubber pipe, and a jet nozzle is connected to the jet pump through a third high-pressure rubber pipe, and the jet nozzle is fixed on a nozzle support.

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

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

[0008] Further, the jet nozzle comprises a nozzle shell and a nozzle liner, the nozzle liner is arranged inside the nozzle shell and has a smooth contact surface, the nozzle liner surface is provided with a convex, and the nozzle shell is provided with an L-shaped clamping groove corresponding to the movement of the convex, the nozzle shell is stretched by 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 converging nozzle to a self-excited oscillation pulse jet nozzle.

[0009] The application also provides a suspended abrasive modified water jet method for device deicing, which adopts the suspended abrasive modified water jet device for device deicing.

[0010] S1, opening a water source, the water source enters the water tank through the water source inlet;

[0011] S2, when the water tank is filled with water, PAM additive is added through the modifier feeding hopper, then the mechanical rotary stirrer is started to stir, when the PAM additive is uniformly stirred, 20-40 mesh walnut shells are added through the abrasive feeding hopper for stirring, and finally a stable modified suspended abrasive slurry is formed;

[0012] S3, starting the booster device, the suspended abrasive slurry in the water tank is pressurized by the booster device, then sequentially passes through the second high-pressure rubber pipe, the jet pump and the third high-pressure rubber pipe, and finally enters the jet nozzle, and finally forms a jet impact device icing after being accelerated by the jet nozzle.

[0013] Further, the method further comprises adding the on-site collected crushed ice through the ice particle feeding hopper on the jet pump, starting the rotary ice breaker in the ice particle feeding hopper to crush the crushed ice into 15-25 mesh ice particles, then sucking the crushed ice into the jet pump through the negative pressure of the jet pump, mixing the crushed ice with the fluid in the second high-pressure rubber pipe in the jet pump, forming a pre-mixed ice particle abrasive jet, and then passing through the jet nozzle to wash and break the device icing.

[0014] Further, the step S3 further comprises stretching the nozzle shell by 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 converging nozzle to a self-excited oscillation pulse jet nozzle, and the high-speed oscillation of the water jet of the nozzle can quickly generate cracks in the device icing.

[0015] Compared with the prior art, the suspended abrasive modified water jet device and method for device deicing provided by the application have the following advantages: 1) by setting a modifier feeding hopper to add a modifier such as a PAM additive and an abrasive feeding hopper to add an abrasive such as walnut shell, a stable modified suspended abrasive slurry jet is formed, the jet form expands the effective distance of the jet and the effective depth of ice body crushing, on the other hand, the liquid viscosity and elasticity are significantly enhanced after the PAM additive is added, when the jet impacts the ice body, the suspended abrasive slurry with enhanced viscoelasticity under low shear force carries the crushed ice to slide to the ground, that is, the liquid as a whole slides from the surface of the device, and liquid droplets are not formed to cause secondary icing, thereby solving the problems of the prior art, such as large labor intensity, jet atomization diffusion under long-distance non-contact conditions, and secondary icing caused by residual water droplets on the surface of the device; 2) by fixedly connecting an ice particle feeding hopper to the jet pump, and setting a rotating ice breaker in the ice particle feeding hopper to form an ice particle adding device, when the abrasive is used up during long-time operation of the jet device, the crushed ice is put into the ice particle adding device on site to form an ice particle abrasive jet, and the working efficiency of the water jet is improved; 3) by setting a protrusion on the surface of the nozzle inner shell, and corresponding opening of an L-shaped clamping groove for the protrusion to move on the nozzle shell, the nozzle shell can be stretched by rotating along the nozzle inner shell, so that a cavity is formed between the nozzle shell and the nozzle inner shell, the jet nozzle is changed from a conventional conical converging nozzle to a self-excited oscillation pulse jet nozzle, and the high-speed oscillation of the jet nozzle water jet causes the ice body on the device to quickly crack, at this time, it is particularly suitable for the case that the jet distance is far or the ice thickness on the device is large, and the conical converging nozzle is difficult to form effective ice body crushing. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the suspended abrasive modified water jet device for device deicing provided by the application.

[0017] Figure 2 is a sectional view of the jet nozzle provided by the application.

[0018] Figure 3 is an external view of the jet nozzle provided by the application.

[0019] In the figure, 1 is a water tank, 2 is a mechanical rotating stirrer, 3 is a modifier feeding hopper, 4 is an abrasive feeding hopper, 5 is a water source inlet, 6 is a first high-pressure rubber pipe, 7 is a pressure increasing device, 8 is a second high-pressure rubber pipe, 9 is a jet pump, 10 is a third high-pressure rubber pipe, 11 is a jet nozzle, 111 is a nozzle shell, 112 is a nozzle inner shell, 113 is a protrusion, 114 is an L-shaped clamping groove, 12 is a nozzle support, 13 is a jet, 14 is ice on a device, 15 is an ice particle feeding hopper, and 16 is a rotating ice breaker. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific drawings.

[0021] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0022] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Please refer to Figure 1 As shown in the drawings, the present application provides a kind of for equipment deicing suspended abrasive modified water jet device, including water tank 1, mechanical rotary agitator 2 is provided in the water tank 1, modifier feed hopper 3, abrasive feed hopper 4 and water source inlet 5 are equipped on the water tank 1, the water tank 1 is connected with booster device 7 by first high-pressure rubber tube 6, the booster device 7 is connected with jet pump 9 by second high-pressure rubber tube 8, the jet pump 9 is connected with jet nozzle 11 by third high-pressure rubber tube 10, the jet nozzle 11 is fixed on nozzle support 12. Wherein, the modifier feed hopper 3 is used to add modifier, the abrasive feed hopper 4 is used to add abrasive, the water source inlet 5 is used to add water, the mechanical rotary agitator 2 is used to fully stir the water added with modifier and abrasive, to form suspended abrasive slurry, then after pressurization by the booster device 7, the jet pump 9 is accelerated by the jet nozzle 11 to form jet 13 and impact equipment icing 14 such as insulator icing.

[0024] As a specific embodiment, the modifier feeding hopper 3 is a polyacrylamide feeding hopper, i.e. the modifier feeding hopper 3 is used for adding polyacrylamide (PAM) as the modifier, the abrasive feeding hopper 4 is a walnut shell feeding hopper, and the abrasive feeding hopper 4 is used for adding walnut shell as the abrasive. After the polyacrylamide and the walnut shell are fully mixed with the added water by the mechanical rotary stirrer 2, a suspended abrasive slurry is formed. The suspended abrasive slurry can be used by pre-mixing or on-site mixing according to the construction condition.

[0025] As a specific embodiment, please refer to Figure 1 As shown in the figure, the jet pump 9 is fixedly connected with an ice particle feeding hopper 15, and the ice particle feeding hopper 15 is provided with a rotary ice breaker 16. The ice particle feeding hopper 15 and the rotary ice breaker 16 jointly constitute an ice particle adding device. When the jet flow device runs for a long time and the abrasive is used up, the broken ice can be collected in the ice particle feeding hopper 15, the rotary ice breaker 16 is started to break the broken ice into fine ice particles with a size of about 20 mesh, the fine ice particles are sucked into the jet pump 9 by negative pressure, and are mixed with the fluid in the second high-pressure rubber pipe 8 in the jet pump 9 to form a pre-mixed ice particle abrasive jet flow to flush and break the ice on the equipment.

[0026] As a specific embodiment, please refer to Figure 2 and Figure 3 As shown in the figure, the jet nozzle 11 comprises a nozzle shell 111 and a nozzle liner 112. The nozzle liner 112 is arranged inside the nozzle shell 111 and has a smooth contact surface. The nozzle liner 112 is provided with a protrusion 113. The protrusion 113 can be a square protrusion or the like. The nozzle shell 111 is provided with an L-shaped clamping groove 114 corresponding to the protrusion 113. The protrusion 113 can move in the L-shaped clamping groove 114. The nozzle shell 111 is stretched towards the jet direction by rotating to the right along the nozzle liner 112 (at this time, the protrusion 113 moves from the short side groove of the L-shaped clamping groove 114 to the long side groove of the L-shaped clamping groove 114). The nozzle shell 111 and the nozzle liner 112 form a cavity in the middle. The jet nozzle 11 changes from a conventional conical converging nozzle to a self-excited oscillation pulse jet nozzle. The high-speed oscillation of the water jet of the nozzle causes the ice on the equipment to quickly crack. The broken ice is carried by the jet to slide to the ground. The surface of the equipment is free of liquid residue, and liquid droplets do not cause secondary icing. The working efficiency of the water jet is improved.

[0027] Please refer to Figure 1 The present application also provides a suspended abrasive modified water jet method for equipment deicing. The method uses the suspended abrasive modified water jet device for equipment deicing described above. The method comprises the following steps:

[0028] S1, open 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 filled with water, the PAM additive is added through the modifier feeding hopper 3, and then the mechanical rotating stirrer 2 is started to stir, when the PAM additive is stirred uniformly, 20-40 mesh walnut shell is added through the abrasive feeding hopper 4 to form a stable modified suspension abrasive slurry;

[0030] S3, start the booster 7, the suspension abrasive slurry in the water tank 1 is pressurized by the booster 7, then passes through the second high-pressure rubber pipe 8, the jet pump 9 and the third high-pressure rubber pipe 10 in turn, enters the jet nozzle 11, and finally forms a jet impact device icing after being accelerated by the jet nozzle 11. After the jet impact ice body, the viscoelasticity of the suspension abrasive slurry under low shear force is enhanced, and the slurry carrying broken ice slides from the surface of the device to the ground, which will not form liquid drops to cause secondary icing.

[0031] As a specific embodiment, please refer to Figure 1 When the jet device is running for a long time and the abrasive is used up, the method further comprises adding the broken ice collected on site through the ice particle feeding hopper 15 on the jet pump 9, starting the rotating ice breaking device 16 in the ice particle feeding hopper 15 to break the broken ice into 15-25 mesh ice particles, then sucking in through the negative pressure of the jet pump 9, mixing with the fluid in the second high-pressure rubber pipe 8 in the jet pump 9, forming a pre-mixed ice particle abrasive jet, and then passing through the jet nozzle 11 to wash and break the device icing.

[0032] As a specific embodiment, please refer to Figure 2 And Figure 3 When the jet distance is far or the device icing is thick and the washing time is long, the nozzle shell 111 is stretched in the jet direction by rotating to the right along the nozzle inner shell 112 (at this time, the protrusion 113 moves from the short slot of the L-shaped slot 114 to the long slot of the L-shaped slot 114), so that a cavity is formed between the nozzle shell 111 and the nozzle inner shell 112, and the jet nozzle 11 changes 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 makes the device icing quickly crack, improving the working efficiency of the water jet.

[0033] Compared with the prior art, the suspended abrasive modified water jet device and method for device deicing provided by the application have the following advantages: 1) by setting a modifier feeding hopper to add a modifier such as a PAM additive and an abrasive feeding hopper to add an abrasive such as walnut shell, a stable modified suspended abrasive slurry jet is formed, the jet form expands the effective distance of the jet and the effective depth of ice crushing, on the other hand, the liquid viscosity and elasticity are significantly enhanced after adding the PAM additive, when the jet impacts the ice body, the viscoelastic enhanced suspended abrasive slurry under low shear force carries the crushed ice to slide to the ground, that is, the liquid as a whole slides from the surface of the device, and liquid droplets are not formed to cause secondary icing, thereby solving the problems of the prior art, such as large labor intensity, long-distance non-contact conditions of jet atomization diffusion, and secondary icing caused by residual water droplets on the surface of the device; 2) by fixedly connecting an ice particle feeding hopper to the jet pump, and setting a rotating ice breaker in the ice particle feeding hopper to form an ice particle adding device, when the jet device is used for a long time and the abrasive is used up, the crushed ice is put into the ice particle adding device on site to form an ice particle abrasive jet, and the working efficiency of the water jet is improved; 3) by setting a protrusion on the surface of the nozzle liner, and corresponding opening an L-shaped clamping groove for the protrusion to move on the nozzle shell, the nozzle shell can be stretched by rotating 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 conventional conical converging nozzle to a self-excited oscillation pulse jet nozzle, the high-speed oscillation of the jet nozzle water jet causes the device ice to quickly crack, at this time, it is particularly suitable for when the jet distance is far or the device ice is thick, and the conical converging nozzle is difficult to form effective ice body crushing.

[0034] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the application and not to limit the application, although the application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the application can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the application, and they should all be covered in the scope of the claims of the application.

Claims

1. A suspended abrasive modified waterjet device for de-icing of equipment, characterized in that, Including water tank, mechanical rotating stirrer is arranged in the water tank, modifier feeding hopper, abrasive feeding hopper and water inlet are arranged on the water tank, the water tank is connected with pressure increasing device through first high pressure rubber tube, the pressure increasing device is connected with jet pump through second high pressure rubber tube, the jet pump is connected with jet nozzle through third high pressure rubber tube, the jet nozzle is fixed on nozzle support; The jet pump is fixedly connected with ice particle feeding hopper, and a rotating ice breaker is arranged in the ice particle feeding hopper; The jet nozzle comprises a nozzle shell and a nozzle liner, the nozzle liner is arranged in the nozzle shell and has a smooth contact surface, the surface of the nozzle liner is provided with a protrusion, an L-shaped clamping groove corresponding to the movement of the protrusion is formed in the nozzle shell, the nozzle shell is stretched by rotating along the nozzle liner, at this time, the protrusion is relatively moved from the short side groove of the L-shaped clamping groove to the long side groove of the L-shaped clamping groove, so that a cavity is formed between the nozzle shell and the nozzle liner, and the jet nozzle is changed from a conical converging nozzle into a self-excited oscillation pulse jet nozzle; The method comprises the following steps: S1, opening the water source, the water source enters the water tank through the water inlet; S2, when the water tank is filled with water, PAM additive is added through the modifier feeding hopper, then the mechanical rotating stirrer is started to stir, when the PAM additive is uniformly stirred, 20-40 mesh walnut shell is added through the abrasive feeding hopper to form a stable modified suspended abrasive slurry; S3, the pressure increasing device is started, the suspended abrasive slurry in the water tank is pressurized by the pressure increasing device, then sequentially passes through the second high pressure rubber tube, the jet pump and the third high pressure rubber tube to enter the jet nozzle, and finally forms a jet impact device icing after being accelerated by the jet nozzle.

2. The suspended abrasive modified waterjet device for de-icing of equipment of claim 1, wherein, The modifier feeding hopper is a polyacrylamide feeding hopper, and the abrasive feeding hopper is a walnut shell feeding hopper.

3. The suspended abrasive modified waterjet method for ice removal from equipment of claim 1, wherein, The method further comprises adding the on-site collected crushed ice through the ice particle feeding hopper on the jet pump, starting the rotating ice breaker in the ice particle feeding hopper to crush the crushed ice into 15-25 mesh ice particles, then sucking the crushed ice through the jet pump, mixing the crushed ice with the fluid in the second high pressure rubber tube in the jet pump to form a front-mixed ice particle abrasive jet, and then washing and breaking the ice on the equipment through the jet nozzle.

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