Cleaning device and cleaning method for wind power resin perfusion one-way valve

Abstract

The invention discloses a cleaning device and method for a wind power resin filling one-way valve. The cleaning device comprises the one-way valve, a controller, a fluid probe, an electric butterfly valve and an air source. The one-way valve comprises a valve body, a valve element and a spring. The valve body is provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are communicated through a one-way channel, the valve element and the spring are installed in the one-way channel, the one-way channel is provided with a step opposite to the valve element, the valve element abuts against the step through the elastic force of the spring, and then the one-way channel is blocked. The fluid probe is fixedly connected in the one-way channel, the side wall of the valve body is provided with an air channel communicated with the one-way channel, and the air channel is communicated with an air source through an electric butterfly valve; the input end of the controller is electrically connected with the fluid probe, and the output end of the controller is electrically connected with the electric butterfly valve. The probability that the one-way valve is blocked due to residual glue crystallization is reduced, the quality of the wind power blade is improved, and the material cost of filling equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation manufacturing, and in particular to a cleaning device and a cleaning method for a wind power resin infusion one-way valve. Background Art

[0002] The production process of wind turbine blades involves resin infusion. The resin material here is in liquid state and contains a certain proportion of curing agent. After heating, it forms the raw material of FRP. Its performance is greatly affected by temperature. The resin infusion equipment must be equipped with a one-way valve. The function of the one-way valve is to prevent the backflow of resin / curing agent. However, the existing infusion process has the following shortcomings:

[0003] 1. The one-way valve of the existing all-in-one injection machine does not have the function of no-flushing. When the one-way valve is blocked due to crystallization of resin / curing agent, it needs to be disassembled and cleaned manually.

[0004] 2. The one-way valve is flushed manually, but there is no guarantee that there will be no residual glue after flushing. The residual glue will be affected by the temperature and crystallize to block the spring of the one-way valve, making the one-way valve ineffective.

[0005] 3. During the manual cleaning process, the resin / curing agent produces volatile molecules that pollute the working environment, causing great harm to the workers and not meeting EHS requirements.

[0006] 4. The one-way valve can only be replaced after it is completely blocked, so additional spare parts maintenance costs will be incurred. Before replacement, due to the fluctuation of the glue output and the abnormal mixing ratio, there will be hidden dangers to the quality of the blades and a deficit in the warehouse inventory. For example, the market price of a one-way valve is 150 yuan / piece, and a one-way valve is blocked in a three-day cycle. There are seven sets of dual-outlet injection integrated equipment (14 pieces), calculated based on 300 days of production, so the annual one-way valve consumables cost reaches 420,000 yuan / year. Summary of the invention

[0007] In view of the defects in the prior art, the probability of residual glue crystallization clogging in the one-way valve is reduced, the quality of wind turbine blades is improved, and the material cost of the injection equipment is reduced. The present invention provides a cleaning device for a wind power resin injection one-way valve; it includes a one-way valve, a controller, a fluid probe, an electric butterfly valve and an air source; the one-way valve includes a valve body, a valve core and a spring; the valve body is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are connected through a one-way channel, the valve core and the spring are installed in the one-way channel, the one-way channel is provided with a step opposite to the valve core, and the valve core is pressed against the step by the elastic force of the spring, thereby blocking the one-way channel; the fluid probe is fixedly connected in the one-way channel, the side wall of the valve body is provided with an air channel connected to the one-way channel, and the air channel is connected to the air source through the electric butterfly valve; the input end of the controller is electrically connected to the fluid probe, and the output end of the controller is electrically connected to the electric butterfly valve.

[0008] The beneficial effects of this equipment are: the valve body of the one-way valve adds an airway structure, and after each resin injection, the controller controls the electric butterfly valve to open, and uses high-speed airflow to blow the one-way channel to blow out the residual glue remaining in the one-way channel. That is, the residual glue is processed as soon as possible after injection, which effectively avoids the problem of residual glue crystallizing in the one-way valve and causing blockage. It not only solves the problem of manual cleaning of the one-way valve and the problem of polluting the working environment, but also prolongs the life of a single one-way valve, which is conducive to reducing the consumables cost of the injection equipment.

[0009] Preferably, a baffle plate for tightening a spring is provided in the one-way passage, and the spring is compressed between the valve core and the baffle plate to maintain the one-way conduction performance of the one-way valve.

[0010] Preferably, the fluid probe is a diffuse reflection optical fiber probe, which can accurately feedback the on-off state of the one-way valve according to the change of reflected light.

[0011] Preferably, the controller is a PLC industrial computer. As a common industrial control device, the PLC industrial computer can edit and execute programs according to the needs, has strong versatility, stable and reliable operation, and low failure rate.

[0012] Preferably, the fluid probe and the opening end of the air channel are both located on a side of the step facing the valve core.

[0013] Preferably, at least two air channels are provided, and all the air channels are evenly distributed along the steps. Ventilation and blowing of multiple air channels can improve the removal rate of residual glue.

[0014] Preferably, all the airways are connected to the air source through air pipes, and the electric butterfly valve is connected to the air pipe. The air pipe here adopts a high-pressure air pipe, which can meet the air pressure requirement within 10Mpa.

[0015] Preferably, the side of the step is provided with a sink corresponding to the opening of each air channel, and each sink is provided with an elastic valve sheet, which is pushed open by the air pressure in the air channel, so that the gas in the air source can pass into the one-way channel. The initial position of the elastic valve sheet is to cover the sink, that is, to block the opening of the air channel. When the air pressure in the air channel reaches a certain pressure value, the elastic valve sheet can be pushed open, and the elastic valve sheet plays a one-way conduction role, allowing only gas to be blown out of the air channel, while preventing resin from entering the air channel.

[0016] The present invention also provides a method for cleaning a wind power resin infusion check valve, using the above-mentioned cleaning device, and the steps are as follows:

[0017] S1. During the infusion process, the fluid mixture of resin and curing agent enters from the liquid inlet of the one-way valve, pushes open the valve core and compresses the spring, and at the same time squeezes the elastic valve sheet, so that the elastic valve sheet blocks the opening of the airway, and finally discharges from the discharge port. During the infusion process, the detection value of the fluid probe is sent to the controller;

[0018] S2. After the injection stops, the elastic force of the spring pushes the valve core, causing the valve core to contact the step to form a blockage, and the one-way valve is closed;

[0019] S3, after stopping the perfusion, the fluid probe sends the changed detection value to the controller;

[0020] S4, the controller opens the electric butterfly valve, and the gas in the gas source passes through the electric butterfly valve, opens the elastic valve plate, and blows out the residual fluid mixture in the one-way channel where the valve core is located;

[0021] S5. After the electric butterfly valve is opened for the set time, the controller closes the electric butterfly valve, and the elastic valve piece returns to its original position to block the airway, and the cleaning is completed.

[0022] The beneficial effect of the method is that the one-way valve can be automatically cleaned after injection, and the flushing effect is good, the residual glue amount is extremely small, and the normal opening and closing of the one-way valve can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0024] Figure 1 It is a structural schematic diagram of this embodiment;

[0025] Figure 2 for Figure 1 Schematic diagram of the internal structure of the one-way valve;

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0027] In the attached drawings, there are a one-way valve 1, a controller 2, a fluid probe 3, an electric butterfly valve 4, an air source 5, a valve body 6, a valve core 7, a spring 8, a liquid inlet 9, a liquid outlet 10, a one-way channel 11, a baffle 12, a step 13, an airway 14, a sink 15, an elastic valve plate 16, and an air pipe 17. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0030] like Figure 1 As shown, this embodiment provides a cleaning device for a wind power resin infusion check valve, comprising a check valve 1, a controller 2, a fluid probe 3, an electric butterfly valve 4 and an air source 5. The specific structure of the check valve 1 is as follows:

[0031] like Figure 2 As shown, the one-way valve 1 includes a valve body 6, a valve core 7 and a spring 8. The valve body 6 is provided with a liquid inlet 9 and a liquid outlet 10, and the liquid inlet 9 and the liquid outlet 10 are connected through a one-way channel 11. The valve core 7 and the spring 8 are installed in the one-way channel 11. Specifically, a baffle 12 for pressing the spring 8 is provided in the one-way channel 11. The spring 8 is compressed between the valve core 7 and the baffle 12 to maintain the one-way conduction performance of the one-way valve 1. The one-way channel 11 is provided with a step 13 opposite to the valve core 7. The valve core 7 is pressed against the step 13 by the elastic force of the spring 8, thereby blocking the one-way channel 11.

[0032] In order to provide monitoring accuracy and purge effect, the fluid probe 3 in this embodiment is a diffuse reflection fiber optic probe. The diffuse reflection fiber optic probe can accurately feedback the on-off state of the one-way valve 1 according to the change of the reflected light. The fluid probe 3 is fixedly connected in the one-way channel 11, specifically fixed on a side of the step 13 facing the valve core 7. The side wall of the valve body 6 is provided with an air channel 14 connected to the one-way channel 11, and the air channel 14 is connected to the air source 5 through the electric butterfly valve 4. Specifically, at least two air channels 14 are provided, and all air channels 14 are evenly distributed along the step 13. Multiple air channels 14 are located on a side of the step 13 facing the valve core 7, and all air channels 14 are blown at the same time, which can improve the removal rate of residual glue. All air channels 14 are connected to the air source 5 through the air pipe 17 respectively, and the electric butterfly valve 4 is connected to the air pipe 17. The air pipe 17 here adopts a high-pressure air pipe 17, which can meet the air pressure requirement within 10Mpa.

[0033] like Figure 3As shown, in order to meet the requirement of "only allowing gas to blow out from the air channel 14 and preventing resin from entering the air channel 14", the side of the step 13 in this embodiment is provided with a sink 15 corresponding to the opening of each air channel 14, and each sink 15 is provided with an elastic valve sheet 16. The elastic valve sheet 16 is pushed open by the air pressure in the air channel 14, so that the gas in the air source 5 can pass into the one-way channel 11. The initial position of the elastic valve sheet 16 is to cover the sink 15, that is, to block the opening of the air channel 14. When the air pressure in the air channel 14 reaches a certain pressure value, the elastic valve sheet 16 can be pushed open, and the elastic valve sheet 16 plays a role of one-way conduction.

[0034] The controller 2 in this embodiment is a PLC industrial computer. As a common industrial control device, the PLC industrial computer has a preset execution program. The input end of the controller 2 is electrically connected to the fluid probe 3, and the output end of the controller 2 is electrically connected to the electric butterfly valve 4. The controller 2 automatically completes the following control steps according to the execution program:

[0035] If during the perfusion process, a fluid mixture of resin and curing agent enters from the liquid inlet 9 of the one-way valve 1, pushes open the valve core 7 and compresses the spring 8, while squeezing the elastic valve sheet 16, so that the elastic valve sheet 16 blocks the opening of the airway 14 and is finally discharged from the drain port 10, the detection value of the fluid probe 3 during the perfusion process is sent to the controller 2, and the controller 2 keeps the electric butterfly valve 4 in a closed state.

[0036] If the perfusion is stopped, the elastic force of the spring 8 pushes the valve core 7, so that the valve core 7 contacts the step 13 to form a blockage, and the one-way valve 1 is closed. After the perfusion is stopped, the fluid probe 3 sends the changed detection value to the controller 2, and the controller 2 opens the electric butterfly valve 4. The gas in the gas source 5 passes through the electric butterfly valve 4, flushes the elastic valve plate 16, and blows out the residual fluid mixture in the one-way channel 11 where the valve core 7 is located. After the set purge time, the controller 2 closes the electric butterfly valve 4, and the elastic valve plate 16 returns to block the airway 14, and the cleaning is completed.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A cleaning device for a wind power resin injection check valve; characterized in that: Including one-way valve, controller, fluid probe, electric butterfly valve and air source; The one-way valve comprises a valve body, a valve core and a spring; the valve body is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are connected through a one-way channel, the valve core and the spring are installed in the one-way channel, the one-way channel is provided with a step opposite to the valve core, and the valve core is pressed against the step by the elastic force of the spring, thereby blocking the one-way channel; The fluid probe is fixedly connected in the one-way channel, and the side wall of the valve body is provided with an air channel connected to the one-way channel, and the air channel is connected to the air source through an electric butterfly valve; The input end of the controller is electrically connected to the fluid probe, and the output end of the controller is electrically connected to the electric butterfly valve.

2. A cleaning device for a wind power resin infusion check valve according to claim 1, characterized in that: A baffle plate for tightening the spring is arranged in the one-way channel.

3. A cleaning device for a wind power resin infusion check valve according to claim 1, characterized in that: The fluid probe is a diffuse reflection optical fiber probe.

4. A cleaning device for a wind power resin infusion check valve according to claim 1, characterized in that: The controller is a PLC industrial computer.

5. The cleaning device for a wind power resin infusion check valve according to claim 1, characterized in that: The fluid probe and the opening end of the air channel are both located on a side of the step facing the valve core.

6. A cleaning device for a wind power resin infusion check valve according to claim 5, characterized in that: There are at least two air passages.

7. A cleaning device for a wind power resin infusion check valve according to claim 6, characterized in that: All airways are evenly distributed along the steps.

8. The cleaning device for a wind power resin infusion check valve according to claim 6, characterized in that: All the air passages are connected to the air source through air pipes respectively, and the electric butterfly valve is connected to the air pipes.

9. A cleaning device for a wind power resin infusion check valve according to claim 6, characterized in that: The side of the step is provided with a sink groove corresponding to the opening of each airway, and each sink groove is provided with an elastic valve sheet. The elastic valve sheet is pushed open by the air pressure in the airway, so that the gas in the air source passes into the one-way channel.

10. A method for cleaning a wind power resin infusion check valve, characterized in that: Applied to the cleaning device described in claim 9, the steps are as follows: S1. During the infusion process, the fluid mixture of resin and curing agent enters from the liquid inlet of the one-way valve, pushes open the valve core and compresses the spring, and at the same time squeezes the elastic valve sheet, so that the elastic valve sheet blocks the opening of the airway, and finally discharges from the discharge port. During the infusion process, the detection value of the fluid probe is sent to the controller; S2. After the injection stops, the elastic force of the spring pushes the valve core, causing the valve core to contact the step to form a blockage, and the one-way valve is closed; S3, after stopping the perfusion, the fluid probe sends the changed detection value to the controller; S4, the controller opens the electric butterfly valve, and the gas in the gas source passes through the electric butterfly valve, opens the elastic valve plate, and blows out the residual fluid mixture in the one-way channel where the valve core is located; S5. After the electric butterfly valve is opened for the set time, the controller closes the electric butterfly valve, and the elastic valve piece returns to its original position to block the airway, and the cleaning is completed.

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