A sampling device for testing liquid food

Abstract

This utility model relates to the field of food sampling technology and discloses a sampling device for liquid food testing, including a sampling cylinder. A storage box is located at the center of the upper end face of the sampling cylinder. A programmable controller is fixedly connected to the center of the upper end face of the storage box. A driving structure is provided inside the sampling cylinder. The driving structure includes a lead screw, the upper end of which passes through the upper inner wall of the sampling cylinder and the lower end face of the storage box, extending into the interior of the storage box. A worm gear is fixedly connected to the end of the lead screw. A worm is provided on one side of the worm gear. Supports are provided at both ends of the worm gear. A micro servo motor is fixedly connected to the rear end face of the support. In this utility model, by setting a worm gear drive, the worm gear has self-locking properties to prevent the lead screw from rotating, thereby preventing the piston from moving towards the sampling end. Furthermore, it works in conjunction with a heating element inside the sampling tube to heat the sample, reducing viscosity, increasing fluidity, reducing the generation of pressure, and improving safety during use.

Description

Technical Field

[0001] This utility model relates to the field of food sampling technology, and in particular to a sampling device for testing liquid food. Background Technology

[0002] Liquid food refers to food that exists in a liquid state, typically including beverages, dairy products, condiments, soups, and other liquid foods. They play an important role in people's daily lives, not only providing essential nutrition but also possessing various functionalities and flavors. Liquid food testing refers to the quality, safety, and composition analysis of liquid foods to ensure they comply with relevant standards and regulations, protecting consumer health and safety. Sampling devices for liquid food testing are equipment used to collect representative samples from liquid foods. Their design aims to ensure the accuracy and representativeness of the samples while avoiding contamination and cross-contamination.

[0003] There are still some problems in the use of existing sampling devices for liquid food testing. Most current sampling structures use a piston moving inside the sampling cylinder to draw the liquid food into the sampling cylinder by creating negative pressure. However, manual extraction requires a greater pushing and pulling force. Using a lead screw to drive the piston can easily damage the motor or motor due to the reverse pulling force. Therefore, those skilled in the art have provided a sampling device for liquid food testing to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sampling device for liquid food testing. This device utilizes a worm gear drive with self-locking properties to prevent the lead screw from rotating, thereby preventing the piston from moving towards the sampling end. Furthermore, it works in conjunction with a heating element inside the sampling tube to reduce viscosity, increase fluidity, minimize pressure buildup, and improve safety during use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sampling device for testing liquid food, comprising a sampling tube, a storage box provided at the center of the upper end face of the sampling tube, a programmable controller fixedly connected at the center of the upper end face of the storage box, and a driving structure provided inside the sampling tube;

[0006] The driving structure includes a lead screw, the upper end of which passes through the upper inner wall of the sampling cylinder and the lower end face of the storage box to the interior of the storage box, and a worm gear is fixedly connected to the end of the lead screw. A worm is provided on one side of the worm gear, and brackets are provided at both the front and rear ends of the worm. A micro servo motor is fixedly connected to the rear end face of the bracket at the rear end. A lifting block is threaded on the lower part of the outer wall of the lead screw, and guide rods are provided on the upper end faces of the lifting blocks on both sides of the lead screw. Both guide rods are fixedly connected to the upper inner wall of the sampling cylinder.

[0007] A sampling tube is provided at the center of the lower end face of the sampling cylinder, a temperature regulating structure is provided at the lower center of the rear end face of the sampling cylinder, and a piston is fixedly connected to the lower end face of the lifting block;

[0008] The above technical solution uses a micro servo motor to drive a worm gear to rotate, which in turn drives a worm wheel to rotate, which in turn drives a lead screw to rotate. This causes the lifting block to move upward along two guide rods, which in turn drives the piston to move upward, creating a negative pressure at the lower part of the sampling cylinder, thus drawing the liquid food into the sampling cylinder.

[0009] Furthermore, the sampling tube includes a pipe, which is fixedly connected to the lower end face of the sampling cylinder. A base is fitted on the upper part of the outer wall of the pipe, and a storage groove is provided on the upper end face of the base near the edge. A heating wire is provided inside the storage groove.

[0010] Through the above technical solution, the pressure generated during the piston's upward movement is discharged through four vent holes.

[0011] Furthermore, the pipe is a thermally conductive silicone tube, and a plug is provided at the lower end of the pipe;

[0012] The above technical solution prevents liquid food from flowing out of the end of the pipe.

[0013] Furthermore, an observation window is fixedly connected to the lower center of the front end face of the sampling tube, and the observation window has a scale at the center of the front end face;

[0014] The above technical solution makes it easy to observe the internal extraction volume through the observation window.

[0015] Furthermore, a battery module is provided on one side of the lower inner wall of the storage box;

[0016] The above technical solution facilitates the provision of electrical energy through a battery module.

[0017] Furthermore, the upper end face of the sampling tube has four air vents arranged in a rectangular pattern near the edge;

[0018] Through the above technical solution, the pressure generated during the piston's upward movement is discharged through four vent holes.

[0019] Furthermore, the temperature regulation structure includes a heat insulation shell, with dustproof nets on both the upper and lower ends of the heat insulation shell, heat dissipation fins at the center of the interior of the heat insulation shell, and multiple miniature heat dissipation fans inside the heat insulation shell at the lower end of the heat dissipation fins. A cooling and heating plate is fixedly connected to the center of the front end of the heat insulation shell, and the front end of the cooling and heating plate passes through the rear end of the sampling tube and extends into the interior of the sampling tube, with a heat-conducting plate at its end.

[0020] The above technical solution controls the heating or cooling of the cooling and heating element. The temperature is transferred to the liquid food through the heat conduction plate to ensure that the optimal storage temperature is maintained during the sampling and storage process. The temperature generated at the other end of the cooling and heating element is transferred to the heat dissipation fins, which activates multiple micro heat dissipation fans. These fans draw air out of the heat dissipation fins to create air circulation and ensure the long-term operation of the cooling and heating element.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the heating wire heats the pipe, which reduces the viscosity of the liquid food during the heating process, increases its fluidity, and facilitates the absorption of the liquid food into the sampling cylinder. The micro servo motor drives the worm gear to rotate, the worm gear drives the worm wheel to rotate, and the worm wheel drives the lead screw to rotate, thereby causing the lifting block to move upward along the two guide rods, which in turn drives the piston to move upward, creating a negative pressure at the lower part of the sampling cylinder, thus drawing the liquid food into the sampling cylinder.

[0023] 2. In this utility model, heating or cooling is achieved by controlling the heating and cooling elements, and the temperature is transferred to the liquid food through the heat conduction plate, ensuring that the optimal storage temperature is maintained during the sampling and storage process. Attached Figure Description

[0024] Figure 1 This is a perspective view of a sampling device for detecting liquid food according to the present invention.

[0025] Figure 2 This is a three-dimensional sectional view of a sampling device for detecting liquid food proposed in this utility model;

[0026] Figure 3 This is a three-dimensional exploded view of a sampling device for detecting liquid food according to the present invention;

[0027] Figure 4 This is a three-dimensional sectional view of a sampling device for testing liquid food proposed in this utility model.

[0028] Legend:

[0029] 1. Sampling cylinder; 2. Observation window; 3. Sampling tube; 4. Scale; 5. Storage box; 6. Programmable controller; 7. Battery module; 8. Piston; 9. Drive structure; 10. Temperature regulation structure; 11. Vent hole;

[0030] 301. Pipeline; 302. Base; 303. Storage tank; 304. Heating wire;

[0031] 901. Lead screw; 902. Worm gear; 903. Worm; 904. Bracket; 905. Miniature servo motor; 906. Lifting block; 907. Guide rod;

[0032] 1001. Insulation shell; 1002. Cooling and heating elements; 1003. Heat conduction plate; 1004. Dustproof mesh; 1005. Heat dissipation fins; 1006. Miniature cooling fan. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figure 1-4 An embodiment of this utility model is provided: a sampling device for testing liquid food, including a sampling cylinder 1, a storage box 5 is provided at the center of the upper end face of the sampling cylinder 1, a programmable controller 6 is fixedly connected at the center of the upper end face of the storage box 5, and a driving structure 9 is provided inside the sampling cylinder 1.

[0035] The drive structure 9 includes a lead screw 901. The upper end of the lead screw 901 passes through the upper inner wall of the sampling cylinder 1 and the lower end face of the storage box 5 to the interior of the storage box 5. A worm gear 902 is fixedly connected to the end of the lead screw 901. A worm 903 is provided on one side of the worm gear 902. A bracket 904 is provided at both the front and rear ends of the worm 903. A micro servo motor 905 is fixedly connected to the rear end face of the bracket 904 at the rear end. A lifting block 906 is threaded on the lower part of the outer wall of the lead screw 901. A guide rod 907 is provided on the upper end face of the lifting blocks 906 on both sides of the lead screw 901. Both guide rods 907 are fixedly connected to the upper inner wall of the sampling cylinder 1.

[0036] A sampling tube 3 is provided at the center of the lower end face of the sampling cylinder 1. A temperature regulating structure 10 is provided at the lower center of the rear end face of the sampling cylinder 1. A piston 8 is fixedly connected to the lower end face of the lifting block 906. The worm 903 is driven to rotate by the micro servo motor 905. The worm 903 drives the worm wheel 902 to rotate. The worm wheel 902 drives the lead screw 901 to rotate, thereby causing the lifting block 906 to move upward along the two guide rods 907, thereby driving the piston 8 to move upward, creating a negative pressure at the lower part of the sampling cylinder 1, and sucking the liquid food into the sampling cylinder 1.

[0037] The sampling tube 3 includes a pipe 301, which is fixedly connected to the lower end face of the sampling cylinder 1. A base 302 is sleeved on the upper part of the outer wall of the pipe 301. A storage tank 303 is provided on the upper end face of the base 302 near the edge. A heating wire 304 is provided inside the storage tank 303. The pressure generated during the rise of the piston 8 is discharged through four vent holes 11.

[0038] Pipe 301 is a heat-conducting silicone tube, and a plug is provided at the lower end of pipe 301 to prevent liquid food from flowing out from the end of pipe 301.

[0039] An observation window 2 is fixedly connected to the lower center of the front end face of the sampling tube 1. The observation window 2 has a scale 4 at the center of the front end face, which makes it easy to observe the internal extraction volume through the observation window 2.

[0040] A battery module 7 is located on one side of the lower inner wall of the storage box 5, which facilitates the supply of power through the battery module 7.

[0041] The upper end face of the sampling cylinder 1 has four vent holes 11 arranged in a rectangular shape near the edge. The pressure generated during the rise of the piston 8 is discharged through the four vent holes 11.

[0042] The temperature regulation structure 10 includes a heat insulation shell 1001. Dustproof nets 1004 are provided on both the upper and lower ends of the heat insulation shell 1001. Heat dissipation fins 1005 are located at the center of the interior of the heat insulation shell 1001. Multiple miniature cooling fans 1006 are located inside the heat insulation shell 1001 below the heat dissipation fins 1005. A cooling / heating plate 1002 is fixedly connected to the center of the front end of the heat insulation shell 1001. The front end of the cooling / heating plate 1002 penetrates the rear end of the sampling cylinder 1 and extends into the interior of the sampling cylinder 1, and its end is provided with a heat-conducting... The plate 1003 heats or cools the cooling / heating element 1002 by controlling the heat conduction plate 1003. The temperature is transferred to the liquid food through the heat conduction plate 1003 to ensure that the optimal storage temperature is maintained during the sampling and storage process. The temperature generated at the other end of the cooling / heating element 1002 is transferred to the heat dissipation fins 1005, which activates multiple micro cooling fans 1006. The multiple micro cooling fans 1006 draw out the air inside the heat dissipation fins 1005 to form air circulation and ensure the long-term operation of the cooling / heating element 1002.

[0043] Working principle: When in use, remove the stopper and insert the pipe 301 into the liquid food. The programmable controller 6 starts the micro servo motor 905, the cooling and heating element 1002 and the heating wire 304. The heating wire 304 heats the pipe 301, which reduces the viscosity of the liquid food and increases its fluidity, making it easier to draw the liquid food into the sampling cylinder 1. The micro servo motor 905 drives the worm gear 903 to rotate, which in turn drives the worm wheel 902 to rotate. The worm wheel 902 drives the lead screw 901 to rotate, which causes the lifting block 906 to move upward along the two guide rods 907. This causes the piston 8 to move upward, creating a negative pressure at the lower part of the sampling cylinder 1, which draws the liquid food into the sampling cylinder 1.

[0044] The temperature of the liquid food is monitored by a temperature sensor inside the sampling cylinder 1. The cooling and heating element 1002 is then controlled to heat or cool the liquid food. The temperature is transferred to the liquid food through the heat conduction plate 1003 to ensure that the optimal storage temperature is maintained during the sampling and storage process. The temperature generated at the other end of the cooling and heating element 1002 is transferred to the heat dissipation fins 1005, which activates multiple micro cooling fans 1006. The multiple micro cooling fans 1006 draw out the air inside the heat dissipation fins 1005 to form air circulation and ensure the long-term operation of the cooling and heating element 1002.

[0045] After sampling, the heating wire 304 is de-energized, the plug is placed at the end of the pipe 301, and the pressure generated during the piston 8's ascent is discharged through the four vent holes 11.

[0046] The programmable controller 6 also includes temperature sensor signal input, limit switch signal input, operation panel button / switch signal input, and temperature sensor. The PLC executes a self-test program to confirm that the status of each sensor and actuator is normal. Target temperature, viscosity, and other parameters are set through the HMI or operation panel. The heating wire 304 is started to preheat the pipe 301 to reduce the initial viscosity. The temperature sensor monitors the temperature inside the sampling cylinder 1. This is a commonly used technique in existing control and monitoring systems and will not be elaborated on further here.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sampling device for liquid food testing comprising a sampling cylinder (1), characterized in that: The sampling tube (1) has a storage box (5) at the center of its upper end face, and a programmable controller (6) is fixedly connected to the center of its upper end face. The sampling tube (1) has a drive structure (9) inside. The drive structure (9) includes a lead screw (901). The upper end of the lead screw (901) passes through the upper inner wall of the sampling cylinder (1) and the lower end face of the storage box (5) to the interior of the storage box (5). A worm gear (902) is fixedly connected to the end of the lead screw (902). A worm (903) is provided on one side of the worm gear (902). A bracket (904) is provided at both the front and rear ends of the worm gear (903). A micro servo motor (905) is fixedly connected to the rear end face of the bracket (904) at the rear end. A lifting block (906) is threaded on the lower part of the outer wall of the lead screw (901). A guide rod (907) is provided on the upper end face of the lifting blocks (906) on both sides of the lead screw (901). Both guide rods (907) are fixedly connected to the upper inner wall of the sampling cylinder (1). The sampling tube (3) is provided at the center of the lower end face of the sampling tube (1), and a temperature adjustment structure (10) is provided at the lower center of the rear end face of the sampling tube (1). A piston (8) is fixedly connected to the lower end face of the lifting block (906).

2. The sampling device for liquid food detection according to claim 1, characterized in that: The sampling tube (3) includes a pipe (301), which is fixedly connected to the lower end face of the sampling tube (1). A base (302) is sleeved on the upper part of the outer wall of the pipe (301), and a storage groove (303) is provided on the upper end face of the base (302) near the edge. A heating wire (304) is provided inside the storage groove (303).

3. The sampling device for liquid food detection according to claim 2, characterized in that: The pipe (301) is a thermally conductive silicone tube, and a plug is provided at the lower end of the pipe (301).

4. The sampling device for liquid food detection according to claim 1, characterized in that: An observation window (2) is fixedly connected to the lower center of the front end face of the sampling tube (1), and a scale (4) is provided at the center of the front end face of the observation window (2).

5. The sampling device for liquid food detection according to claim 1, characterized in that: A battery module (7) is provided on one side of the lower inner wall of the storage box (5).

6. The sampling device for liquid food detection according to claim 1, characterized in that: The sampling tube (1) has four ventilation holes (11) arranged in a rectangular pattern near the edge of its upper end.

7. The sampling device for liquid food detection according to claim 1, characterized in that: The temperature regulation structure (10) includes a heat insulation shell (1001), and dustproof nets (1004) are provided on both the upper and lower ends of the heat insulation shell (1001). Heat dissipation fins (1005) are provided at the center of the heat insulation shell (1001). Multiple miniature heat dissipation fans (1006) are provided inside the heat insulation shell (1001) at the lower end of the heat dissipation fins (1005). A cooling and heating element (1002) is fixedly connected to the center of the front end of the heat insulation shell (1001). The front end of the cooling and heating element (1002) passes through the rear end of the sampling tube (1) and extends into the interior of the sampling tube (1), and a heat-conducting plate (1003) is provided at the end.

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