A polyester resin sampling device

Abstract

The utility model relates to polyester resin detection technical field, and disclose a kind of polyester resin sampling device, including stem control mechanism, it is characterized by: the outside of stem control mechanism is provided with positioning mechanism, positioning mechanism is used to make stem control mechanism keep stable, and the lower end of stem control mechanism is connected with sampling mechanism.The polyester resin sampling device, the polyester resin sampling device is mainly composed of stem control mechanism, positioning mechanism and sampling mechanism. Among them, telescopic link and servo motor are connected by thread and cooperate with absolute value encoder, the extension length of telescopic link can be accurately controlled, thereby the accurate control of depth is realized, and the deviation caused by visual inaccuracy when artificial sampling is avoided;Electric push rod controls sampling cylinder to open or close at specified depth, to ensure the accuracy of sampling operation.Sampling cylinder is used for direct contact with polyester resin, and its quick-release design facilitates cleaning and replacement, suitable for different materials.

Description

Technical Field

[0001] This utility model relates to the field of polyester resin detection technology, specifically a polyester resin sampling device. Background Technology

[0002] Polyester resin sampling devices are used to extract samples from containers such as reaction vessels, dilution tanks, transfer drums, or packaging drums. During the production and R&D of polyester resins, it is necessary to periodically sample the resin solution at different process points to test key indicators such as viscosity, acid value, and color, thereby ensuring product quality and batch consistency.

[0003] Currently, existing handheld sampling devices, such as the one disclosed in Chinese patent CN223320090U, typically include a manually controlled lever and a sampler at the end. Operators must insert the device through the sampling valve of the container and manually control the sampler to reach the approximate target liquid level depth by visual observation and touch before performing the sampling operation. This method relies heavily on manual experience. First, the accuracy of sampling depth control cannot be guaranteed. The gaseous environment above the resin surface and the resin solution itself are usually opaque, making it impossible for operators to accurately determine the actual depth at the sampler tip. Since the composition of polyester resin may differ in different liquid layers—for example, the surface layer may have more volatiles while the bottom layer may have more filler that settles—inaccurate depth control directly leads to insufficient representativeness of the sample, severely affecting the accuracy and reliability of the test results. Even if the target depth is reached, the resin near the sampler opening may have stratification or concentration gradients due to stillness. The directly extracted sample is not a uniformly mixed liquid at that depth and cannot truly reflect the material state at that layer.

[0004] Therefore, we propose a polyester resin sampling device to address the problems mentioned above. Utility Model Content

[0005] This invention provides a polyester resin sampling device, which can solve the problem that existing handheld sampling devices rely mainly on manual experience and cannot guarantee the accuracy of sampling depth control.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A polyester resin sampling device includes a rod control mechanism, a positioning mechanism is provided on the outside of the rod control mechanism to keep the rod control mechanism stable, and a sampling mechanism is connected to the lower end of the rod control mechanism. The rod control mechanism includes an outer rod with a circular cavity inside and an open end. A handle is fixedly connected to the end of the outer rod away from the opening. The handle is equipped with a controller and control buttons. A telescopic rod is slidably sleeved inside the outer rod. A threaded post is threadedly connected to the end of the telescopic rod near the handle. A servo motor that drives the threaded post to rotate is installed at the end of the outer rod near the handle. An absolute encoder is installed on the shaft of the servo motor. An electric push rod is installed at the end of the outer rod away from the threaded post. A control panel that is electrically connected to the controller is installed on the outer rod.

[0007] Preferably, the positioning mechanism includes a fixed seat and an arc-shaped locking plate. The fixed seat is fixedly installed at the end of the outer rod away from the handle, and the arc-shaped locking plate is movably disposed on both sides of the fixed seat. Guide grooves are fixedly connected to both sides of the fixed seat.

[0008] Preferably, a dual-axis motor is installed in the middle of the guide groove on one side, and a bidirectional screw is rotatably connected inside the guide groove where the dual-axis motor is installed. The bidirectional screw consists of two symmetrical screw sections, and the two ends of the screw are fixedly connected to the drive shafts on both sides of the dual-axis motor.

[0009] Preferably, a guide slide rod is fixedly connected inside the guide slide groove on the other side, and two sliding blocks are fixedly provided on each arc-shaped plate. One sliding block is slidably connected to the outside of the guide slide rod, and the other sliding block is threadedly connected to the screw on the corresponding side. The dual-axis motor drives the bidirectional screw to rotate, and the sliding blocks on both sides of the bidirectional screw drive the corresponding arc-shaped plate to move closer or further away.

[0010] Preferably, the inner side of the arc-shaped card plate is provided with a card slot, and a magnetic block is fixedly connected to the side of the arc-shaped card plate away from the sliding block.

[0011] Preferably, the sampling mechanism includes a sampling cylinder, which is threadedly connected to the end of the telescopic rod away from the handle, and the inner rod of the electric push rod inside the telescopic rod is slidably connected to the inside of the sampling cylinder.

[0012] Preferably, the sampling cylinder is provided with a sliding seat inside, and the sliding seat is inserted into the inner rod of the electric push rod; A powerful electromagnet is installed inside the sliding seat. A conductive electrode is provided on the side of the sliding seat near the inner rod of the electric push rod. A power supply contact is provided at the end of the inner rod of the electric push rod.

[0013] Preferably, a high-speed motor is installed inside the sliding seat, and a drive column is fixedly connected to the rotation of the high-speed motor. A rotating plate is installed on the drive column, and the rotating plate rotates in cooperation with the inner wall of the sampling cylinder. A rotating sealing ring is provided on the outer periphery of the rotating plate.

[0014] Preferably, a stirring rod is fixedly connected to the side of the rotating plate away from the sliding seat, and a cap is fixedly connected to the end of the stirring rod away from the rotating plate. The two ends of the cap are set as conical, and the sampling cylinder opening is provided with an inner chamfered opening that matches the conical cap. A capacitive liquid level sensor for monitoring the liquid level of polyester resin solution is installed inside the cap.

[0015] Preferably, the control screen is used to display the extension length of the telescopic rod detected by the absolute encoder, the liquid level data monitored by the capacitive liquid level sensor, and to receive input commands from the operator.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are: This utility model's polyester resin sampling device mainly consists of a rod control mechanism, a positioning mechanism, and a sampling mechanism. The telescopic rod and servo motor, connected by a threaded connection and an absolute encoder, precisely control the extension length of the telescopic rod, thus achieving accurate depth control and avoiding deviations caused by inaccurate visual observation during manual sampling. An electric push rod controls the opening and closing of the sampling cylinder at a specified depth, ensuring the accuracy of the sampling operation. The sampling cylinder, used for direct contact with the polyester resin, features a quick-disassembly design for easy cleaning and replacement, suitable for various materials. A bidirectional screw, in conjunction with a dual-axis motor, utilizes the synchronous movement of two sliding blocks to open and close the arc-shaped clamping plate, providing a stable platform for the device and preventing shaking caused by manual handling. A high-speed motor installed inside the sliding seat drives a stirring rod to locally stir the resin at a specific depth, eliminating concentration gradients and ensuring the representativeness of the sample. During operation, the operator starts the device, and the telescopic rod is automatically controlled by the controller and servo motor to accurately reach the preset depth. The positioning mechanism fixes the device to provide a stable sampling platform. After the sampling cylinder reaches the specified depth, it achieves sampling and stirring through the electric push rod and its built-in high-speed motor, thereby ensuring the accuracy and representativeness of the sampling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall external structure of this utility model; Figure 2 This is a schematic diagram showing the unfolded structure of the device according to this utility model; Figure 3 This is a schematic diagram of the overall side cross-sectional structure of this utility model; Figure 4 For the present utility model Figure 3 A magnified structural diagram at point B.

[0018] The components include: 1. Rod control mechanism; 2. Positioning mechanism; 3. Sampling mechanism; 11. Outer rod; 12. Handle; 13. Telescopic rod; 14. Threaded column; 15. Servo motor; 16. Electric push rod; 17. Control main screen; 21. Fixed base; 22. Guide slide; 23. Dual-axis motor; 24. Bidirectional screw; 25. Guide slide; 26. Arc-shaped clamping plate; 27. Sliding block; 28. Magnetic block; 31. Sampling cylinder; 32. Sliding seat; 33. High-speed motor; 34. Drive column; 35. Rotating plate; 36. Stirring rod; 37. Cover; 38. Inner chamfered opening; 39. Capacitive liquid level sensor. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0020] Example 1: Please see Figure 1-4 This utility model provides a technical solution: A polyester resin sampling device includes a rod control mechanism 1, characterized in that: a positioning mechanism 2 is provided on the outside of the rod control mechanism 1, the positioning mechanism 2 is used to keep the rod control mechanism 1 stable, and a sampling mechanism 3 is connected to the lower end of the rod control mechanism 1. The rod control mechanism 1 includes an outer rod 11, with a circular cavity inside the outer rod 11 and an open end. A handle 12 is fixedly connected to the end of the outer rod 11 away from the opening. A controller and control buttons are provided on the handle 12. A telescopic rod 13 is slidably sleeved inside the outer rod 11. A threaded post 14 is threadedly connected to the end of the telescopic rod 13 near the handle 12. A servo motor 15 that drives the threaded post 14 to rotate is installed at the end of the outer rod 11 near the handle 12. An absolute encoder is installed on the shaft of the servo motor 15. An electric push rod 16 is installed at the end of the outer rod 11 away from the threaded post 14. A control main screen 17 that is electrically connected to the controller is installed on the outer rod 11.

[0021] The above solution uses a servo motor 15 to drive the threaded column 14 to precisely control the extension length of the telescopic rod 13, and an absolute encoder to provide real-time feedback of depth data to the control panel 17, thus solving the problem of inaccurate depth estimation by manual visual inspection. At the same time, the electric push rod 16 controls the sampling mechanism 3 to open at a specified depth, and the built-in stirring component performs local mixing of the static resin, ensuring the representativeness and accuracy of the sample taken, and realizing automated and precise sampling operations.

[0022] Furthermore, the positioning mechanism 2 includes a fixed seat 21 and an arc-shaped locking plate 26. The fixed seat 21 is fixedly installed on the end of the outer rod 11 away from the handle 12, and the arc-shaped locking plate 26 is movably arranged on both sides of the fixed seat 21. Guide grooves 22 are fixedly connected to both sides of the fixed seat 21.

[0023] A dual-axis motor 23 is installed in the middle of the guide groove 22 on one side. A bidirectional screw 24 is rotatably connected inside the guide groove 22, consisting of two symmetrical screw sections. The two ends of the screw are fixedly connected to the drive shafts on both sides of the dual-axis motor 23. A guide rod 25 is fixedly connected inside the guide groove 22 on the other side. Two sliding blocks 27 are fixedly installed on each arc-shaped clamping plate 26. One sliding block 27 is slidably connected to the outside of the guide rod 25, and the other sliding block 27 is threadedly connected to the corresponding screw. The dual-axis motor 23 drives the bidirectional screw 24 to rotate, causing the sliding blocks 27 on both sides of the bidirectional screw 24 to move the corresponding arc-shaped clamping plate 26 closer to or further away from it. A groove is provided on the inner side of the arc-shaped clamping plate 26, and a magnetic block 28 is fixedly connected to the side of the arc-shaped clamping plate 26 away from the sliding block 27.

[0024] In the above scheme, when a fixing device is required, the dual-axis motor 23 is started. The two drive shafts of the dual-axis motor 23 rotate synchronously, driving the bidirectional screw 24 fixedly connected to it to rotate. The bidirectional screw 24 consists of two screws with opposite thread directions. As the bidirectional screw 24 rotates, the two sliding blocks 27 that are threaded with the two screws at both ends will move simultaneously towards the center or simultaneously to both sides along the guide groove 22. The guide rod 25 in the other guide groove 22 ensures that the other sliding block 27 only moves in a straight line and does not rotate, so that the two arc-shaped clamping plates 26 can open and close synchronously and smoothly.

[0025] The operator controls the rotation of the dual-axis motor 23 to move the arc-shaped clamping plates 26 on both sides inward until the inner grooves tightly clamp the outer edge or flange of the sampling valve. The design of the magnetic block 28 further enhances the reliability of the fixation. When the clamping plate is close to the metal valve, the magnetic force will assist in adsorption, preventing the device from accidentally sliding or falling off during the sampling process, thus achieving dual fixation by mechanical and magnetic forces.

[0026] By precisely adjusting the distance between the two arc-shaped clamping plates 26 via electronic control, this mechanism can adapt to interfaces of different diameters within a certain range, making it highly versatile and allowing for quick clamping without replacing any parts.

[0027] The structure is powered by a dual-axis motor 23, which is converted into symmetrical linear motion by a bidirectional screw 24. This motion drives the arc-shaped clamping plate 26 to achieve automatic centering and clamping. Finally, the mechanical slot and magnetic block 28 work together to provide a stable reference platform for the entire sampling process, solving the shaking and instability problems caused by manual gripping.

[0028] Example 2: Please see Figure 1-4 Furthermore, in conjunction with Embodiment 1, the sampling mechanism 3 includes a sampling cylinder 31, which is threadedly connected to the end of the telescopic rod 13 away from the handle. The inner rod of the electric push rod 16 inside the telescopic rod 13 is slidably connected to the inside of the sampling cylinder 31. A sliding seat 32 is slidably fitted inside the sampling cylinder 31, and the sliding seat 32 is inserted into the inner rod of the electric push rod 16. The sampling cylinder 31, as a container that directly contacts the material, can be quickly disassembled and replaced via a threaded connection, facilitating cleaning or sampling of different materials. The telescopic rod 13 is responsible for accurately delivering the sampling cylinder 31 to the target depth, while the inner rod of the built-in electric push rod 16 is the power actuator. Its pushing action will push the sliding seat 32 and the sealing cover 37 structure inside the sampling cylinder 31, realizing the opening and closing of the opening of the sampling cylinder 31, thereby achieving quantitative sampling.

[0029] A strong electromagnet is installed inside the sliding seat 32. A conductive electrode is provided on the side of the sliding seat 32 near the inner rod of the electric push rod 16. A power supply contact is provided at the end of the inner rod of the electric push rod 16.

[0030] When the inner rod end of the electric push rod 16 is inserted into the sliding seat 32, the power supply contact at its end contacts the conductive electrode on the sliding seat 32, forming a temporary energized circuit. This circuit supplies power to the strong electromagnet, causing it to generate magnetic force and firmly attract the metal end of the inner rod, ensuring the effective transmission of mechanical thrust. On the other hand, it also supplies power to the high-speed motor 33 inside the sliding seat 32, realizing the synchronous transmission of power and electricity while maintaining the airtightness of the entire structure.

[0031] A high-speed motor 33 is installed inside the sliding seat 32. A drive column 34 is fixedly connected to the rotation of the high-speed motor 33. A rotating plate 35 is installed on the drive column 34. The rotating plate 35 rotates and cooperates with the inner wall of the sampling cylinder 31. A rotating sealing ring is provided on the outer periphery of the rotating plate 35.

[0032] The high-speed motor 33 serves as the power source for the stirring function. It transmits rotational power to the rotating plate 35 via the drive column 34. The rotating plate 35 divides the inner cavity of the sampling cylinder 31 into an upper "drive chamber" and a lower "sampling chamber," and maintains a dynamic seal with the inner wall of the sampling cylinder 31 through a rotating sealing ring on its outer periphery, ensuring complete isolation between the two chambers. This prevents the resin sample in the lower chamber from entering the precision drive component in the upper chamber, thus avoiding contamination and jamming, while allowing the upper motor to stably drive the lower stirring mechanism.

[0033] A stirring rod 36 is fixedly connected to the side of the rotating plate 35 away from the sliding seat 32. A cap 37 is fixedly connected to the end of the stirring rod 36 away from the rotating plate 35. The cap 37 has tapered ends. The sampling cylinder 31 has an inner chamfered opening 38 that matches the tapered cap 37. A capacitive level sensor 39 for monitoring the liquid level of the polyester resin solution is installed inside the cap 37. The main control screen 17 is used to display the extension length of the telescopic rod 13 detected by the absolute encoder, the liquid level data monitored by the capacitive level sensor 39, and to receive input commands from the operator.

[0034] In the closed state, the conical cap 37 is tightly embedded in the inner chamfered opening 38 at the bottom of the sampling cylinder 31 under the pulling force of the electric push rod 16, forming a seal to prevent resin from entering at other depths during the device's descent. When the designated depth is reached, the electric push rod 16 pushes, causing the cap 37 to open, allowing resin to flow into the sampling cylinder 31.

[0035] The capacitive liquid level sensor 39 inside the cap 37 monitors the depth of the sampling cylinder 31 in the solution in real time. When the set resin liquid level is reached, a signal is sent, and the controller controls the electric push rod 16 to open the cap 37 for sampling, thereby accurately controlling the sampling depth. When the cap 37 is opened, the stirring rod 36 enters the resin solution simultaneously. The stirring rod 36 and the cap 37 can rotate under the drive of the high-speed motor 33 to locally stir the resin at a specific depth, break up the concentration gradient, and ensure the representativeness of the sample.

[0036] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A polyester resin sampling device, comprising a rod control mechanism (1), characterized in that: The rod control mechanism (1) is provided with a positioning mechanism (2) on its exterior. The positioning mechanism (2) is used to keep the rod control mechanism (1) stable. The lower end of the rod control mechanism (1) is connected to a sampling mechanism (3). The rod control mechanism (1) includes an outer rod (11), which has a circular cavity inside and one end open. A handle (12) is fixedly connected to the end of the outer rod (11) away from the opening. A controller and control buttons are provided on the handle (12). A telescopic rod (13) is slidably sleeved inside the outer rod (11). A threaded post (14) is threadedly connected to the end of the telescopic rod (13) near the handle (12). A servo motor (15) that drives the threaded post (14) to rotate is installed at the end of the outer rod (11) near the handle (12). An absolute encoder is installed on the shaft of the servo motor (15). An electric push rod (16) is installed at the end of the outer rod (11) away from the threaded post (14). A control main screen (17) that is electrically connected to the controller is installed on the outer rod (11).

2. The polyester resin sampling device according to claim 1, characterized in that: The positioning mechanism (2) includes a fixed seat (21) and an arc-shaped plate (26). The fixed seat (21) is fixedly installed at the end of the outer rod (11) away from the handle (12). The arc-shaped plate (26) is movably arranged on both sides of the fixed seat (21). Guide grooves (22) are fixedly connected to both sides of the fixed seat (21).

3. The polyester resin sampling device according to claim 2, characterized in that: A dual-axis motor (23) is installed in the middle of the guide groove (22) on one side. A bidirectional screw (24) is rotatably connected inside the guide groove (22) where the dual-axis motor (23) is installed. The bidirectional screw (24) consists of two symmetrical screws, and the two screws at both ends are fixedly connected to the drive shafts on both sides of the dual-axis motor (23).

4. A polyester resin sampling device according to claim 3, characterized in that: On the other side, a guide slide rod (25) is fixedly connected inside the guide slide groove (22). Two sliding blocks (27) are fixedly provided on each arc-shaped plate (26). One sliding block (27) is slidably connected to the outside of the guide slide rod (25), and the other sliding block (27) is threadedly connected to the screw on the corresponding side. The dual-axis motor (23) drives the bidirectional screw (24) to rotate. The sliding blocks (27) on both sides of the bidirectional screw (24) drive the corresponding arc-shaped plate (26) to move closer to or further away.

5. A polyester resin sampling device according to claim 4, characterized in that: The inner side of the arc-shaped card plate (26) is provided with a card slot, and a magnetic block (28) is fixedly connected to the side of the arc-shaped card plate (26) away from the sliding block (27).

6. The polyester resin sampling device according to claim 1, characterized in that: The sampling mechanism (3) includes a sampling cylinder (31), which is threadedly connected to the end of the telescopic rod (13) away from the handle. The inner rod of the electric push rod (16) inside the telescopic rod (13) is slidably connected to the inside of the sampling cylinder (31).

7. A polyester resin sampling device according to claim 6, characterized in that: The sampling tube (31) is equipped with a sliding seat (32) inside, and the sliding seat (32) is inserted into the inner rod of the electric push rod (16). The sliding seat (32) is equipped with a strong electromagnet. A conductive electrode is provided on the side of the sliding seat (32) near the inner rod of the electric push rod (16). A power supply contact is provided at the end of the inner rod of the electric push rod (16).

8. A polyester resin sampling device according to claim 7, characterized in that: The sliding seat (32) is equipped with a high-speed motor (33), and a drive column (34) is fixedly connected to the rotation of the high-speed motor (33). A rotating plate (35) is installed on the drive column (34). The rotating plate (35) rotates with the inner wall of the sampling cylinder (31), and a rotating sealing ring is provided on the outer periphery of the rotating plate (35).

9. A polyester resin sampling device according to claim 8, characterized in that: A stirring rod (36) is fixedly connected to the side of the rotating plate (35) away from the sliding seat (32). A cap (37) is fixedly connected to the end of the stirring rod (36) away from the rotating plate (35). The two ends of the cap (37) are set as conical. An inner chamfered mouth (38) that matches the conical cap (37) is provided at the opening of the sampling cylinder (31). A capacitive liquid level sensor (39) for monitoring the liquid level of polyester resin solution is installed inside the cap (37).

10. A polyester resin sampling device according to claim 1, characterized in that: The main control screen (17) is used to display the extension length of the telescopic rod (13) detected by the absolute encoder, the liquid level data monitored by the capacitive liquid level sensor (39), and to receive input commands from the operator.

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