An on-line sampling device for insulating paint production

Abstract

The present invention relates to the field of insulating paint production equipment, and particularly relates to an on-line sampling device for insulating paint production, which includes a driving mechanism and a sampling mechanism; the driving mechanism includes a rotating assembly and a sampling assembly; the sampling mechanism includes a sampling tube group, a diversion tube group and a sampling bottle; the rotating assembly is installed below the dilution kettle; the sampling tube group is connected to the rotating assembly; the diversion tube group is connected to the rotating assembly; the sampling bottle is connected to the diversion tube group; by internally installing a sampling tube in the dilution kettle, and manually adjusting the rotation of the sampling tube to a random position, the insulating paint at different heights is sampled, and after each sampling is completed, the insulating paint in the sampling tube is completely discharged, so as to avoid the influence of residual insulating paint on the subsequent detection results; thus solving the problem that the sampling point is not completely random during on-line sampling in the dilution kettle, resulting in inaccurate sampling detection results.

Description

Technical Field

[0001] The present invention relates to the field of insulating paint production equipment, and particularly relates to an on-line sampling device for insulating paint production. Background Art

[0002] Insulating paint is a special paint with excellent electrical insulation properties and plays a crucial role in electrical equipment. It can effectively protect electrical equipment and prevent problems such as short circuits, leakage, and breakdowns. After the raw materials of insulating paint are proportioned and mixed and reacted in a reaction kettle, they need to be diluted and dissolved to the required concentration. In order to ensure product quality during the production process of insulating paint, on-line sampling of the insulating paint in the dilution kettle is required during the dilution process to achieve real-time monitoring of the production process.

[0003] Insulating paint is mixed with organic solvents in the dilution kettle to adjust performance indicators such as product viscosity and solid content. During this process, the insulating paint needs to be continuously refluxed to make the mixing more uniform. Currently, the sampling device usually connects a sampling pipe to the reflux pipe and sets a control valve on the sampling pipe to achieve on-line sampling and ensure real-time monitoring of various indicators of the insulating paint. The biggest problem with this sampling method is that since the reflux pipe flows out from the bottom of the dilution kettle and flows into the upper part of the dilution kettle, when sampling the insulating paint flowing out of the reflux pipe, it is impossible to monitor the insulating paint at different height positions of the dilution kettle in real time, thus reducing the randomness of sampling. The prior art has proposed good solutions to this problem. For example, a sampling device for paint detection after paint production with the patent publication number CN115493890B proposes a multi-point sampling method, which realizes separated multi-point sampling at different liquid levels through negative pressure suction and separates and stores the taken samples to ensure the accuracy of sampling detection.

[0004] Although the prior art has solved the problem that the sampling detection result is inaccurate because only the insulating paint at the bottom of the dilution kettle is sampled during sampling, there are still the following problems: Compared with ordinary paint, the on-line sampling detection of insulating paint is carried out during the mixing process in the dilution kettle. During the mixing process in the dilution kettle, the insulating paint at some sampling points is not mixed evenly, or solid particles float and sink during the stirring process. And due to the reflux circulation of the insulating paint in the dilution kettle through the reflux pipe, it will cause a downward flow trend of the insulating paint, which will affect the representativeness of sampling at different depths at this time. As a result, the samples taken at different depths by the same sampling rod at the same time cannot fully represent the performance indicators of the insulating paint at that depth position, causing deviations in the results of on-line sampling detection.

[0005] In view of the above situation, in order to overcome the above technical problems, the present invention designs an on-line sampling device for insulating paint production. Summary of the Invention

[0006] The present invention provides an on-line sampling device for insulating paint production, which solves the problem that the sampling point is not completely random during on-line sampling in the dilution kettle, resulting in inaccurate sampling test results. By installing a sampling pipe inside the dilution kettle and manually adjusting the rotation of the sampling pipe to a random position, insulating paint at different heights can be sampled. After each sampling is completed, the insulating paint in the sampling pipe is completely discharged to avoid the influence of residual insulating paint on subsequent test results.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An on-line sampling device for insulating paint production includes a dilution kettle, a stirring mechanism and a reflux pipe; it also includes a driving mechanism and a sampling mechanism; the driving mechanism includes a rotating component and a sampling component; the sampling mechanism includes a sampling pipe group, a diversion pipe group and a sampling bottle; the rotating component is installed below the dilution kettle; the sampling pipe group is connected to the rotating component; the diversion pipe group is connected to the rotating component; the sampling bottle is connected to the diversion pipe group; when the rotating component rotates, it drives the sampling pipe group to rotate to a random sampling point. When the sampling pipe group rotates to a random sampling point, it presses the rotating component to make the sampling component slide, and the sliding of the sampling component drives the insulating paint to flow into the sampling pipe group and through the diversion pipe group into the sampling bottle.

[0009] Preferably, the rotating component includes a rotating disk, a driving disk, an air extraction piston, a nylon rope and a pressing and stretching component; the rotating disk is connected to the dilution kettle, and a diversion cavity is opened inside it; the diversion pipe group includes multiple diversion pipes; the diversion pipes are connected to the diversion cavity; the driving disk is connected to the reflux pipe; the air extraction piston is slidably installed in the diversion pipe; the nylon rope is connected between the sampling component and the air extraction piston; the pressing and stretching component is connected to the air extraction piston.

[0010] In the above solution, the rotation of the rotating disk drives the sampling mechanism to rotate to a random position, so as to achieve sampling at a random position. Pressing the pressing and stretching component can drive the air extraction piston to slide. The sliding of the air extraction piston drives the nylon rope to pull the sampling component to slide, so as to achieve the sampling component opening the sampling mechanism to complete the sampling work.

[0011] Preferably, a diversion slope is provided at the bottom of the diversion cavity; the diversion slope is a V-shaped structure.

[0012] In the above solution, the diversion slope at the bottom of the diversion cavity is set to a V-shaped structure, so that the insulating paint can all flow along the diversion slope into the diversion pipe after entering the diversion cavity, avoiding the existence of residual insulating paint after each sampling, which affects the subsequent sampling results.

[0013] Preferably, the pressing member includes a pressing disk, a compression slide bar, and a compression spring; the pressing disk is installed below the driving disk, the compression slide bar is connected between the pressing disk and the air extraction piston; the compression spring is connected between the pressing disk and the driving disk.

[0014] In the above solution, the pressing action of the pressing disk can press the compression slide bar, thereby driving the compression slide bar to drive the air extraction piston to move, achieving the purpose of opening the sampling mechanism, and under the action of the compression spring, it can ensure that the air extraction piston can reset after sampling.

[0015] Preferably, a through hole is provided at the bottom of the driving disk; a sliding valve is connected to the pressing disk.

[0016] In the above solution, when no sampling is carried out, the sliding valve is in an open state. At this time, the insulating paint can flow back through the through hole, enabling the insulating paint to flow back normally and ensuring the dilution and mixing effect of the insulating paint. When sampling, the sliding valve slides to the inner wall position of the through hole under the drive of the pressing disk to close the through hole. At this time, the return pipe is closed, and the insulating paint stops flowing downward. At this time, the sampling results of the insulating paint at different heights can be more accurate, avoiding the insulating paint sampled from the lower layer of the dilution kettle being the one flowing from the upper layer to the lower layer.

[0017] Preferably, the sampling tube group includes multiple sampling tubes with unequal lengths; the multiple sampling tubes are vertically connected to the rotating disk.

[0018] In the above solution, multiple sampling tubes with different lengths are provided to ensure that the sampling tubes can sample at different heights during sampling. And the sampling tubes are connected to the rotating disk, enabling the sampling tubes to rotate. Thus, the sampling tubes can sample at different points and different heights inside the dilution kettle, making the sampling more random and representative. The vertical setting of the sampling tubes allows the insulating paint to enter the sampling tubes and flow into the diversion cavity under the action of gravity, avoiding the presence of residual insulating paint in the sampling tubes after each sampling, which may affect the subsequent sampling results.

[0019] Preferably, the sampling assembly includes a sampling piston, a fixing plate, and a sealing spring; the sampling piston is slidably installed in the sampling tube; the fixing plate is installed in the diversion cavity; the sealing spring is connected between the fixing plate and the diversion cavity.

[0020] In the above solution, the opening and closing of the sampling tube are controlled by the sliding of the sampling piston, achieving the purpose of real-time sampling. And when no sampling is carried out, under the action of the sealing spring, the sampling piston can ensure the closing of the sampling tube, avoiding the inflow of insulating paint into the sampling tube when no sampling is carried out, which may affect the sampling results.

[0021] Preferably, the fixing plate is installed with a gap between it and the upper end surface of the diversion cavity when the sealing spring is not compressed, and the cross-section of the fixing plate is an inverted V-shaped structure.

[0022] In the above solution, installing with a gap can enable the fixing plate to reset after sampling is completed. The insulating paint in the sampling tube flows into the diversion cavity through the gap between the fixing plate and the diversion cavity, and then flows out through the diversion tube, avoiding the influence of the residual insulating paint on the sampling result after each sampling.

[0023] Preferably, a sealing slope is provided above the sampling tube; the upper end of the sampling piston is a frustum-shaped structure, and the maximum diameter of the sampling piston is smaller than the inner diameter of the sampling tube.

[0024] In the above solution, through the cooperation of the sealing slope and the frustum-shaped structure of the sampling piston, it is ensured that the insulating paint cannot enter the sampling tube when sampling is not carried out. On the one hand, it avoids the insulating paint entering the sampling tube and being unable to be diluted and mixed normally. On the other hand, it ensures the real-time nature of sampling, and the sealing method of the sampling piston can effectively avoid wear and extend the service life of the sampling piston; the maximum diameter of the sampling piston being smaller than the inner diameter of the sampling tube enables the insulating paint to enter the sampling tube when the sampling piston slides.

[0025] Preferably, a diversion port is opened on the diversion tube; an outflow tube is connected at the position of the diversion port; the sampling bottle is connected to the outflow tube; the air extraction piston is located on the right side of the diversion port when the pressing disc is at the lowest end.

[0026] In the above solution, since there will still be some insulating paint flowing from the sampling tube into the diversion tube after the fixing plate resets, in order to avoid waste of insulating paint and contamination of the sampling mechanism, the diversion port is kept open all the time, so that the residual insulating paint can still flow into the sampling bottle through the diversion port after the sampling mechanism is closed.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. Compared with the existing online sampling equipment for insulating paint production, the present invention is provided with a rotating assembly that can drive the sampling tube group to rotate to a random position, thereby ensuring that the sampling points are different each time, and further ensuring that the sampled results are random and representative; the sampling tube group includes multiple sampling tubes of different lengths, so that the insulating paint sampled by the sampling tubes is the insulating paint at different height positions in the dilution kettle, so as to be able to monitor in real time whether the insulating paint at different depth positions in the dilution kettle is mixed evenly, and in combination with the rotating assembly, achieve random sampling at different points and different depths, further improving the randomness and representativeness of the online sampling of insulating paint and ensuring the accuracy of the sampling result detection.

[0029] 2. The present invention realizes the normal circulation of the return pipe during dilution by providing a through-hole at the bottom of the driving disk and controlling the opening and closing of the through-hole through the up-and-down sliding of the pressing disk. During the sampling process, when the pressing disk slides upward, the through-hole between the return pipe and the driving disk will be closed, stopping the circulation of the return pipe and closing the stirring mechanism. At this time, sampling can avoid the influence of the downward flow of the insulating paint on the sampling result, preventing the insulating paint sampled by the relatively short sampling pipe from being a mixture of the insulating paint in the lower and upper layers of the dilution kettle, thereby improving the representativeness of the insulating paint sampling at different depth positions and ensuring the accuracy of the sampling result detection.

[0030] 3. The present invention is provided with a diversion slope in the diversion cavity, installs the fixing plate with a gap from the upper layer of the diversion cavity, and sets the diversion port to be normally open. After each sampling is completed, when the sampling pipe is closed and the insulating paint cannot enter the sampling pipe again, the residual insulating paint in the sampling pipe can flow into the diversion pipe through the gap of the fixing plate and the diversion slope, and then flow out through the diversion port into the sampling bottle, ensuring that there is no residual insulating paint in the sampling mechanism after sampling is completed, and thus ensuring that the insulating paint sampled each time can accurately reflect the state of the insulating paint in the dilution kettle and ensuring the accuracy of the sampling result detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a structural diagram of the interior of the dilution kettle of the present invention;

[0034] Figure 3 It is a cross-sectional view of the internal structure of the sampling mechanism of the present invention;

[0035] Figure 4 It is a schematic diagram of the positions of the first through-hole and the second through-hole of the present invention;

[0036] Figure 5 For Figure 3 The enlarged view of the structure at A in

[0037] Figure 6 For Figure 3 The enlarged view of the structure at B in

[0038] Figure 7Internal structure sectional view of the diversion cavity of the present invention;

[0039] Figure 8 is Figure 3 enlarged view of the structure at position C in;

[0040] In the figure: 1, dilution kettle; 2, stirring mechanism; 3, return pipe; 32, sampling valve; 4, driving mechanism; 41, rotating assembly; 411, rotating disk; 4111, diversion cavity; 41111, diversion slope; 412, driving disk; 4121, through hole; 413, air extraction piston; 414, nylon rope; 415, pressing and stretching member; 4151, pressing disk; 41511, sliding valve; 4152, compression sliding rod; 4153, compression spring; 42, sampling assembly; 421, sampling piston; 422, fixing plate; 423, sealing spring; 5, sampling mechanism; 51, sampling pipe group; 511, sampling pipe; 5111, sealing slope; 52, diversion pipe group; 521, diversion pipe; 5211, diversion port; 5212, outflow pipe; 53, sampling bottle. Specific implementation mode

[0041] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the specification drawings and specific implementation modes.

[0042] Please refer to Figures 1 to 8 , the present invention provides an on-line sampling device for insulating paint production, and the technical solution is as follows:

[0043] As a specific implementation mode of the present invention, referring to Figure 1 , Figure 2 and Figure 3 , an on-line sampling device for insulating paint production includes a dilution kettle 1, a stirring mechanism 2 and a return pipe 3; it also includes a driving mechanism 4 and a sampling mechanism 5; the driving mechanism 4 includes a rotating assembly 41 and a sampling assembly 42; the sampling mechanism 5 includes a sampling pipe group 51, a diversion pipe group 52 and a sampling bottle 53; the rotating assembly 41 is installed below the dilution kettle 1; the sampling pipe group 51 is connected to the rotating assembly 41; the diversion pipe group 52 is connected to the rotating assembly 41; the sampling bottle 53 is connected to the diversion pipe group 52; when the rotating assembly 41 rotates, it drives the sampling pipe group 51 to rotate to a random sampling point. When the sampling pipe group 51 rotates to a random sampling point, it presses the rotating assembly 41 to make the sampling assembly 42 slide. The sampling assembly 42 slides to drive the insulating paint to flow into the sampling pipe group 51 and flow into the sampling bottle 53 through the diversion pipe group 52. To avoid being unable to sample the insulating paint at the bottom of the dilution kettle 1, the sampling valve 32 opened on the return pipe 3 can be retained, so that during the sampling process of the sampling mechanism 5, the insulating paint at the bottom of the dilution kettle 1 can still be sampled through the return pipe 3.

[0044] As a specific embodiment of the present invention, refer to Figure 3 , Figure 4 and Figure 6 , the rotating assembly 41 includes a rotating disk 411, a driving disk 412, an air extraction piston 413, a nylon rope 414, and a pressing and stretching member 415; the rotating disk 411 is connected to the dilution kettle 1, and a diversion cavity 4111 is formed inside it; the diversion pipe group 52 includes a plurality of diversion pipes 521, and the diversion pipes 521 are arc-shaped structures, facilitating the flow of insulating paint inside them; the diversion pipes 521 are connected to the diversion cavity 4111; the driving disk 412 is connected to the reflux pipe 3; the air extraction piston 413 is slidably installed inside the diversion pipe 521; the nylon rope 414 is connected between the sampling assembly 42 and the air extraction piston 413; the pressing and stretching member 415 is connected to the air extraction piston 413. The rotation of the rotating disk 411 drives the sampling mechanism 5 to rotate to a random position, thereby realizing sampling at a random position. During this process, the rotating disk 411 stabilizes the sampling mechanism 5, preventing the insulating paint from impacting the sampling mechanism 5 due to the stirring of the stirring mechanism 2 and causing the sampling mechanism 5 to shake during the sampling process. Pressing the pressing and stretching member 415 can drive the air extraction piston 413 to slide, and the sliding of the air extraction piston 413 drives the nylon rope 414 to pull the sampling assembly 42 to slide, thereby realizing the sampling assembly 42 to open the sampling mechanism 5 to complete the sampling work.

[0045] As a specific embodiment of the present invention, refer to Figure 6 , a diversion slope 41111 is provided at the bottom of the diversion cavity 4111; the diversion slope 41111 is a V-shaped structure. The diversion slope 41111 at the bottom of the diversion cavity 4111 is set as a V-shaped structure, so that all the insulating paint flowing into the diversion cavity 4111 can flow along the diversion slope 41111 into the diversion pipe 521, avoiding the remaining insulating paint after each sampling and affecting the subsequent sampling results.

[0046] As a specific embodiment of the present invention, refer to Figure 4, the pressing member 415 includes a pressing disk 4151, a compression slide bar 4152, and a compression spring 4153; the pressing disk 4151 is installed below the driving disk 412, and the compression slide bar 4152 is connected between the pressing disk 4151 and the air extraction piston 413; the compression spring 4153 is connected between the pressing disk 4151 and the driving disk 412. By the pressing action of the pressing disk 4151, the compression slide bar 4152 can be pressed, so as to drive the compression slide bar 4152 to drive the air extraction piston 413 to move, achieving the purpose of opening the sampling mechanism 5, and under the action of the compression spring 4153, it can ensure that the air extraction piston 413 can be reset after sampling. Here, the elastic modulus of the compression spring 4153 can be adjusted so that each time the compression spring 4153 is completely compressed and then reset, a sampling can be completed (that is, the pressing disk 4151 slides a fixed distance each time), enabling the sampling mechanism 5 to quickly perform an opening and closing process each time, and the amount of insulating paint sampled in this process is equal to the amount of insulating paint required to be sampled each time. On the one hand, it saves the loss caused by excessive sampling. On the other hand, the dilution kettle is still normally stirring and mixing the insulating paint during the sampling process. If the sampling time is too long at this time, the sampled insulating paint will not be representative. By quickly sliding the pressing disk 4151 up and down, the sampling process can be ensured to be fast.

[0047] As a specific implementation manner of the present invention, referring to Figure 3 and Figure 7 , a through hole 4121 is opened at the bottom of the driving disk 412; a sliding valve 41511 is connected to the pressing disk 4151. When sampling is not performed, the sliding valve 41511 is in an open state. At this time, the insulating paint can flow back through the through hole 4121, enabling the insulating paint to flow back normally and ensuring the dilution and mixing effect of the insulating paint. When sampling, the sliding valve 41511 slides to the inner wall position of the through hole 4121 under the drive of the pressing disk 4151 to close the through hole 4121. At this time, the return pipe 3 is closed, and the insulating paint stops flowing downward. At this time, the sampling results of the insulating paint at different heights can be made more accurate, avoiding the insulating paint sampled from the lower layer of the dilution kettle 1 being a mixture of the insulating paint flowing downward from the upper layer and the insulating paint in the lower layer, and further improving the representativeness of the sampled insulating paint for different depths. When the return pipe 3 is closed by the through hole 4121, since there is still insulating paint in the return pipe 3, and this insulating paint can represent the insulating paint at the bottom of the dilution kettle 1, so at this time, the insulating paint at the bottom of the dilution kettle 1 can be sampled through the return pipe 3, avoiding that the sampling mechanism 5 cannot sample the insulating paint at the bottom of the dilution kettle 1.

[0048] As a specific implementation manner of the present invention, referring to Figure 6, the sampling tube group 51 includes a plurality of sampling tubes 511 with unequal lengths; the plurality of sampling tubes 511 are vertically connected to the rotating disk 411. By providing a plurality of sampling tubes 511 with different lengths, it is ensured that the sampling tubes 511 can sample at different heights during sampling. Here, the specific number and specific length of the sampling tubes 511 can be changed according to the height to be sampled and the amount to be sampled, further improving the accuracy of sampling. Moreover, the sampling tubes 511 are connected to the rotating disk 411, enabling the sampling tubes 511 to rotate, so that the sampling tubes 511 can sample at different points and different heights inside the dilution kettle 1, making the sampling more random and representative. The vertical arrangement of the sampling tubes 511 allows the insulating paint to enter the sampling tubes 511 and flow into the diversion cavity 4111 under the action of gravity, avoiding the residual insulating paint in the sampling tubes 511 after each sampling from affecting the subsequent sampling results.

[0049] As a specific embodiment of the present invention, referring to Figure 5 , Figure 6 and Figure 8 , the sampling assembly 42 includes a sampling piston 421, a fixing plate 422, and a sealing spring 423; the sampling piston 421 is slidably installed inside the sampling tube 511; the fixing plate 422 is installed inside the diversion cavity 4111; the sealing spring 423 is connected between the fixing plate 422 and the diversion cavity 4111. By sliding the sampling piston 421 to control the opening and closing of the sampling tube 511, the purpose of real-time sampling is achieved. And when sampling is not carried out, under the action of the sealing spring 423, the sampling piston 421 can ensure the closing of the sampling tube 511, preventing the insulating paint from flowing into the sampling tube 511 when sampling is not performed and affecting the sampling results.

[0050] As a specific embodiment of the present invention, referring to Figure 6 , the fixing plate 422 is installed with a gap between it and the upper end surface of the diversion cavity 4111 when the sealing spring 423 is not compressed, and the cross-section of the fixing plate 422 is an inverted V-shaped structure. Installing with a gap allows the fixing plate 422 to reset after sampling is completed, and the insulating paint in the sampling tube 511 flows into the diversion cavity 4111 through the gap between the fixing plate 422 and the diversion cavity 4111, and then flows out through the diversion tube 521, avoiding the residual insulating paint after each sampling from affecting the sampling results. The inverted V-shaped structure of the fixing plate 422 enables the insulating paint reaching the fixing plate 422 to flow smoothly into the diversion cavity 4111 and there will be no residual insulating paint after sampling is completed and closed.

[0051] As a specific embodiment of the present invention, referring to Figure 8 , a sealing slope 5111 is provided above the sampling tube 511; the upper end of the sampling piston 421 is a frustum-shaped structure, and the maximum diameter of the sampling piston 421 is smaller than the inner diameter of the sampling tube 511.

[0052] By cooperating with the sealing slope 5111 and the truncated cone structure of the sampling piston 421, it is ensured that the insulating varnish cannot enter the sampling tube 511 when sampling is not performed. On the one hand, it is prevented that the insulating varnish enters the sampling tube 511 and cannot be diluted and mixed normally. On the other hand, the real-time sampling is ensured. In addition, the sealing method of the sampling piston 421 can effectively avoid wear and tear and extend the service life of the sampling piston 421. The maximum diameter of the sampling piston 421 is smaller than the inner wall diameter of the sampling tube 511, so that the insulating varnish can enter the sampling tube 511 when the sampling piston 421 slides.

[0053] As a specific embodiment of the present invention, refer to Figure 4 and Figure 6 The guide tube 521 is provided with a guide port 5211; an outflow pipe 5212 is connected to the guide port 5211; the sampling bottle 53 is connected to the outflow pipe 5212; the vacuum piston 413 is located on the right side of the guide port 5211 when the pressure plate 4151 is at the lower end. Since part of the insulating paint will still flow from the sampling tube 511 into the guide tube 521 after the fixed plate 422 is reset, in order to avoid wasting the insulating paint and contaminating the sampling mechanism 5, the guide port 5211 is kept open at this time, so that the residual insulating paint can still flow into the sampling bottle 53 through the guide port 5211 after the sampling mechanism 5 is closed; at the same time, the inner wall of the sampling tube 511, the inner wall of the guide tube 521, the upper surface of the fixed plate 422 and the surface of the guide slope 41111 are coated with an anti-stick coating to improve the fluidity of the insulating paint and enable the insulating paint to flow out completely, thereby ensuring that no insulating paint will remain inside the sampling mechanism 5 after each sampling is completed, so as to avoid affecting the result of the next sampling.

[0054] Working principle: Rotate the driving disk 412 to rotate the rotating assembly 41 as a whole. The rotation of the rotating assembly 41 drives the sampling tube group 51 to rotate to a random sampling point. When the sampling tube group 51 rotates to the random sampling point, the pressing disk 4151 is pressed to make the sampling piston 421 slide open the sampling tube 511, and the insulating paint flows into the sampling tube group 51 and flows into the sampling bottle 53 through the guide tube group 52 to complete the sampling operation.

[0055] Specifically, during the normal operation of the dilution kettle 1, the sliding valve 41511 is located below the through hole 4121, and the through hole 4121 remains open. At this time, the insulating paint in the dilution kettle 1 can be normally refluxed through the reflux pipe 3 to perform a dilution and mixing process.

[0056] When performing on-line sampling, manually rotate the driving disk 412 by a random angle. The rotation of the driving disk 412 drives the rotating disk 411 to rotate. The rotation of the rotating disk 411 drives the sampling tube 511 to rotate to a random position. At this time, the sampled insulating paint is representative and random. After rotating to a random position, push the pressing disk 4151 upward to cut off the backflow of the insulating paint in the dilution kettle 1, ensuring that the insulating paint does not flow downward during the sampling process, so that the insulating paint sampled at different depths can fully represent the performance of the insulating paint at that depth position. At the same time, the compression slide rod 4152 drives the air extraction piston 413 to slide. The sliding of the air extraction piston 413 pulls the nylon rope 414, and the nylon rope 414 pulls the sampling piston 421 to slide downward to press the sealing spring 423. At this time, the sampling tube 511 changes from a sealed state to an open state, and the insulating paint flows into the sampling tube 511 and flows along the sampling tube 511, the upper surface of the fixing plate 422, the diversion slope 41111 and the diversion tube 521 to the position of the diversion port 5211, and flows out through the outflow tube 5212 into the sampling bottle 53. At this time, release the pressing disk 4151. Under the action of the sealing spring 423, the sampling piston 421 resets to seal the sampling tube 511 again. At this time, since there is a gap between the upper surface of the fixing plate 422 and the upper end surface of the diversion cavity 4111, the residual insulating paint in the sampling tube 511 will flow along the upper surface of the fixing plate 422, the diversion slope 41111 and the diversion tube 521 to the position of the diversion port 5211 and flow out through the outflow tube 5212 into the sampling bottle 53, completing the quantitative sampling process, so that there is no residual insulating paint in the sampling mechanism 5, avoiding affecting the result of the next sampling. At the same time, in order to avoid that the insulating paint at the bottom layer in the dilution kettle 1 cannot be sampled, the sampling valve 32 on the return pipe 3 can be opened to sample the insulating paint flowing into the return pipe 3 before closing the through hole 4121. At the same time, under the action of the compression spring 4153, the pressing disk 4151 resets, causing the sliding valve 41511 to slide downward. At this time, the through hole 4121 resumes to be open, and the return pipe 3 starts to return normally.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An online sampling device for insulating paint production, comprising a dilution kettle (1), a stirring mechanism (2) and a reflux pipe (3); characterized in that: It also comprises a driving mechanism (4) and a sampling mechanism (5); the driving mechanism (4) comprises a rotating assembly (41) and a sampling assembly (42); the sampling mechanism (5) comprises a sampling tube group (51), a guide tube group (52) and a sampling bottle (53); the rotating assembly (41) is installed below the dilution kettle (1); the sampling tube group (51) is connected to the rotating assembly (41); the guide tube group (52) is connected to the rotating assembly (41); the sampling bottle (53) is connected to the guide tube group (52); the rotating assembly (41) rotates to drive the sampling tube group (51) to rotate to a random sampling point, the rotating assembly (41) is manually pressed to make the sampling assembly (42) slide, and the sampling assembly (42) slides to close the return pipe (3) and drive the insulating paint to flow into the sampling tube group (51) through the guide tube group (52) and into the sampling bottle (53); The rotating assembly (41) comprises a rotating disk (411), a driving disk (412), an air extraction piston (413), a nylon rope (414) and a compression piece (415); the rotating disk (411) is connected to the dilution kettle (1), and a flow guide cavity (4111) is provided inside the rotating disk; the flow guide tube group (52) comprises a plurality of flow guide tubes (521); the flow guide tubes (521) are connected to the flow guide cavity (4111); the driving disk (412) is connected to the return tube (3); the air extraction piston (413) is slidably mounted in the flow guide tube (521); the nylon rope (414) is connected between the sampling assembly (42) and the air extraction piston (413); the compression piece (415) is connected to the air extraction piston (413); The compression member (415) comprises a pressure plate (4151), a compression slide bar (4152) and a compression spring (4153); the pressure plate (4151) is installed below the driving plate (412); the compression slide bar (4152) is connected between the pressure plate (4151) and the air extraction piston (413); and the compression spring (4153) is connected between the pressure plate (4151) and the driving plate (412).

2. The online sampling device for insulating paint production according to claim 1 is characterized in that: A diversion slope (41111) is provided at the bottom of the diversion cavity (4111); the diversion slope (41111) is a V-shaped structure.

3. The online sampling device for insulating paint production according to claim 1 is characterized in that: A through hole (4121) is provided at the bottom of the driving disk (412); and a sliding valve (41511) is connected to the pressing disk (4151).

4. The online sampling device for insulating paint production according to claim 1 is characterized in that: The sampling tube group (51) comprises a plurality of sampling tubes (511) of unequal lengths; the plurality of sampling tubes (511) are vertically connected to the rotating disk (411).

5. The online sampling device for insulating varnish production according to claim 4 is characterized in that: The sampling assembly (42) comprises a sampling piston (421), a fixing plate (422) and a sealing spring (423); the sampling piston (421) is slidably mounted in the sampling tube (511); the fixing plate (422) is mounted in the flow guide cavity (4111); and the sealing spring (423) is connected between the fixing plate (422) and the flow guide cavity (4111).

6. The online sampling device for insulating varnish production according to claim 5 is characterized in that: The fixing plate (422) is installed with a gap between it and the upper end surface of the guide cavity (4111) when the sealing spring (423) is not compressed, and the cross section of the fixing plate (422) is an inverted V-shaped structure.

7. The online sampling device for insulating paint production according to claim 5 is characterized in that: A sealing slope (5111) is provided above the sampling tube (511); the upper end of the sampling piston (421) is a truncated cone-shaped structure, and the maximum diameter of the sampling piston (421) is smaller than the inner wall diameter of the sampling tube (511).

8. The online sampling device for insulating paint production according to claim 1 is characterized in that: The flow guide tube (521) is provided with a flow guide port (5211); an outflow pipe (5212) is connected to the flow guide port (5211); the sampling bottle (53) is connected to the outflow pipe (5212); and the air extraction piston (413) is located on the right side of the flow guide port (5211) when the pressure plate (4151) is located at the lowermost end.

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