Crushing device for pretreatment of tobacco pesticide residue detection

Abstract

The utility model discloses a smashing device for tobacco pesticide residue detection pretreatment, which belongs to the technical field of tobacco detection and comprises a smashing tank, a smashing mechanism and a jacket, the smashing mechanism is mounted on the smashing tank, the jacket is coated on the outer surface of the smashing tank, and the clamping sleeve is sleeved on the outer surface of the smashing tank. A cold medium inlet pipe and a cold medium outlet pipe are arranged on the jacket; the crushing tank is provided with a feed hopper and a feed opening, and the filter cartridge is mounted in the feed opening. The tobacco leaf smashing device solves the problem that volatile pesticide components in a sample are prone to partial pyrolysis or dissipation in the tobacco leaf smashing process.

Description

TECHNICAL FIELD

[0001] The utility model relates to tobacco detection technical field, especially relate to a tobacco pesticide residue detection pretreatment is with the rubbing crusher. BACKGROUND

[0002] Tobacco as special economic crops, its pesticide residue is directly related to consumer health and import and export trade compliance. Tobacco pesticide residue detection processing generally includes crushing, extraction, purification, concentration and other links, the existing crushing device (such as shear type rubbing crusher, roll crusher etc.) relies on high-speed rotating blade group (speed 2000-4000r / min) or on roll extrusion mechanism realizes material crushing. However, in the mechanical energy conversion process, the continuous collision and friction of blade edge and tobacco fiber and the extrusion deformation between crushing rollers can generate intense heat energy, and the instantaneous temperature can reach 60-80 DEG C, the temperature rise environment can cause part of pyrethroid, organophosphorus and other volatile pesticide components in sample to pyrolyze or escape, thereby affecting the accuracy of subsequent detection data.

[0003] Therefore, the utility model provides a new scheme to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model discloses a tobacco pesticide residue detection pretreatment is with the rubbing crusher, which solves the problem that volatile pesticide components in the sample are easily pyrolyzed or escaped during tobacco leaf crushing.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A kind of rubbing crusher for tobacco pesticide residue detection pretreatment, including rubbing jar and rubbing mechanism, the rubbing mechanism is installed on the rubbing jar, further including:

[0007] Jacket, the jacket is covered in the rubbing jar outer surface, cold medium inlet pipe and cold medium outlet pipe are provided on the jacket;

[0008] Filter cartridge, the rubbing jar is provided with feed hopper and discharge port, the filter cartridge is installed in the discharge port.

[0009] Further preferably, the discharge port is located at the bottom of the rubbing jar, and the filter cartridge is detachably installed in the discharge port.

[0010] Further preferably, the filter cartridge includes a filter screen and an inner tube, both ends of the inner tube are open, the filter screen is fixed to one end of the inner tube, the inner tube is used to extend into the discharge port, and the inner tube is connected to the discharge port by bolts or screws.

[0011] Further preferably, the inner tube is provided with a flange for limiting position relative to the other end of the filter screen, and when the flange is in contact with the bottom of the discharge port, the filter screen is located at the top of the discharge port.

[0012] Further preferably, the device further comprises a blowing mechanism for removing the crushing products attached to the inner wall of the crushing tank.

[0013] Further preferably, the blowing mechanism comprises a ring pipe, a blowing nozzle and an air inlet pipe.

[0014] The ring pipe is located above the inside of the crushing tank, and the blowing nozzle is arranged on the ring pipe and used for blowing the crushing products attached to the inner wall of the crushing tank.

[0015] One end of the air inlet pipe is in communication with the ring pipe, and the other end of the air inlet pipe penetrates through the crushing tank and extends outward.

[0016] Further preferably, the blowing nozzle is arranged in multiple along the circumferential direction of the crushing tank, and the multiple blowing nozzles are arranged at equal intervals along the circumferential direction of the crushing tank.

[0017] The blowing nozzle has an air outlet direction which forms an angle of 10-25° with the inner wall of the crushing tank.

[0018] Further preferably, the crushing mechanism comprises a motor, a support, a crushing shaft and a crushing piece.

[0019] The motor is installed above the crushing tank through the support, the upper end of the crushing shaft is connected with the output shaft of the motor, and the other end of the crushing shaft extends into the crushing tank, and the crushing piece is located in the crushing tank and used for crushing tobacco in the crushing tank.

[0020] The crushing piece is detachably installed on the crushing shaft.

[0021] Further preferably, the crushing piece comprises a sleeve and a blade.

[0022] The sleeve is sleeved on the crushing shaft and connected with the crushing shaft through bolts or screws, and the blade is fixed on the circumferential surface of the sleeve.

[0023] Further preferably, the feeding hopper is located at one side of the top of the crushing tank, and a cover plate is arranged on the upper cover of the feeding hopper.

[0024] In summary, the device has the following beneficial effects:

[0025] The pulverizing device of this utility model includes a pulverizing tank, a pulverizing mechanism, a jacket, and a filter cartridge. The pulverizing mechanism is mounted on the pulverizing tank, and the jacket covers the outer surface of the pulverizing tank. The jacket is provided with a cold medium inlet pipe and a cold medium outlet pipe. The pulverizing tank is provided with a feed hopper and a discharge port, and the filter cartridge is installed inside the discharge port. The jacket, as a closed cavity encasing the outer wall of the pulverizing tank, has the core function of continuously dissipating the heat generated by the material or components inside the tank through forced convection heat transfer. This prevents the partial pyrolysis or escape of volatile pesticide components such as pyrethroids and organophosphates in the tobacco sample due to temperature rise, thus affecting the accuracy of subsequent test data. Additionally, it can prevent lubrication failure or thermal expansion deformation of mechanical parts due to high temperatures. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the pulverizing device according to a preferred embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional view of a preferred embodiment of the pulverizing device of this utility model;

[0028] Figure 3 This is a partial cross-sectional view of a preferred embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the annular tube and the purging nozzle according to a preferred embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the crusher according to a preferred embodiment of the present invention.

[0031] In the diagram, 1. Grinding tank; 2. Jacket; 3. Support leg; 4. Feed port; 5. Grinding mechanism; 51. Motor; 52. Support; 53. Grinding shaft; 54. Grinding component; 541. Sleeve; 542. Blade; 6. Feed hopper; 7. Air blowing mechanism; 71. Ring pipe; 72. Blowing nozzle; 73. Air inlet pipe; 8. Cold medium outlet pipe; 9. Cold medium inlet pipe; 10. Cover plate; 111. Filter screen; 112. Inner tube; 113. Flange. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Example: A pulverizing device for pretreatment of tobacco pesticide residues for detection, such as... Figures 1-5As shown, including the pulverizing tank 1, pulverizing mechanism 5, jacket 2, filter cartridge and blowing mechanism 7. Pulverizing tank 1 adopts vertical cylindrical body structure, its axis is perpendicular to the ground, the upper and lower ends are configured with semi-elliptical head respectively, to form a closed pulverizing cavity. The pulverizing tank 1 is provided with a feed hopper 6 and a discharge port 4, the discharge port 4 is located at the bottom center of the pulverizing tank 1, and the feed hopper 6 is located at one side of the top of the pulverizing tank 1. The cover plate 10 is provided on the feed hopper 6, and the top of the cover plate 10 is fixed with a protrusion.

[0034] In the above technical scheme, the lower end of the pulverizing tank 1 is a semi-elliptical head, which can guide the material, so the discharge port 4 is arranged at the bottom center of the pulverizing tank 1, so that the pulverized tobacco can be quickly discharged through the discharge port 4.

[0035] The cover plate 10 is mainly arranged to close the feed hopper 6, so as to reduce the foreign matters entering the pulverizing tank 1 through the feed hopper 6.

[0036] The protrusion is mainly arranged to be able to take down or cover the cover plate 10 through the protrusion, so as to be convenient for operation.

[0037] In order to improve the sealing performance between the cover plate 10 and the feed hopper 6, preferably, a silica gel sealing ring is arranged on the contact surface between the cover plate 10 and the feed hopper 6, and the compression amount is controlled to be between 1.2-1.5mm.

[0038] In order to enable the pulverizing tank 1 to be stably supported on the ground or the base plane, preferably, the bottom of the pulverizing tank 1 is provided with supporting legs 3, the supporting legs 3 are provided with three, and the three supporting legs 3 are distributed at equal intervals along the circumferential direction of the pulverizing tank 1. The upper end of the supporting leg 3 is fixed with the bottom of the pulverizing tank 1, and the lower end is fixed with a disc-shaped support block, and the support block is provided with a mounting hole, so as to be mounted on the ground or the base plane through bolts or screws.

[0039] The traditional mainstream pulverizing equipment (including shear type pulverizer, roller pressure crusher, etc.) generally adopts high-speed cutting parts (2000-4000r / min working interval) or double-roller extrusion mechanism to realize material crushing. The pulverizing mechanism presents significant thermal effect in actual operation:

[0040] I. Friction heat generation: continuous friction heat is generated by the high-speed shearing action of the blade 542 edge and the tobacco fiber;

[0041] II. Plastic deformation heat generation: about 35%-45% of mechanical energy is converted into heat energy when the tobacco material experiences compression deformation in the roller gap;

[0042] III. Temperature rise effect: the instantaneous temperature gradient in the pulverizing cavity reaches 60-80K, which exceeds the phase transition critical point of pyrethroid compounds (such as cypermethrin decomposition temperature 65℃) and organophosphorus compounds (such as chlorpyrifos boiling point 89℃), resulting in thermal decomposition (Δm≥12%) and gaseous escape (VOCs loss rate>8%) of the target detection material.

[0043] In order to reduce the influence of temperature rise environment on tobacco sample, the utility model discloses a layer of closed structure's jacket 2 is arranged on the outer surface of the crushing tank 1 to carry out the cooling treatment to tobacco.

[0044] With reference to Figures 1-5 The jacket 2 is covered on the outer surface of the cylinder of the crushing tank 1 by seamless welding, forms annular closed cavity structure, the distance between its inner wall and the outer wall of the crushing tank 1 is controlled between 30-50mm, thereby forms medium flow channel.The jacket 2 is provided with cold medium inlet pipe 9 for the entry of cold medium and cold medium outlet pipe 8 for the discharge of cold medium, the cold medium inlet pipe 9 is located at the lower side of the jacket 2, and the cold medium outlet pipe 8 is located at the upper side of the jacket 2 to form the counterflow heat exchange mode.

[0045] The counterflow design that the cold medium enters from the lower side of the jacket 2 and is discharged from the upper side forms the flow path that is opposite to the temperature gradient of the material in the crushing tank 1, and the heat exchange efficiency is improved.

[0046] Preferably, the cold medium is water, ethylene glycol solution, freon or other cold source.

[0047] In the above technical scheme, the jacket 2 is closed cavity wrapped in the outer wall of the crushing tank 1, and its core function is to continuously export the heat generated by the material or components in the tank through forced convection heat exchange, prevent the pyrolysis or dispersion of volatile pesticide components such as pyrethroid and organophosphorus in tobacco sample due to temperature rise, thereby affecting the accuracy of subsequent detection data.In addition, it can also avoid the lubrication failure or thermal expansion deformation of mechanical components caused by high temperature.

[0048] With reference to Figures 1-5 The crushing mechanism 5 is installed on the crushing tank 1, and the crushing mechanism 5 includes a motor 51, a bracket 52, a crushing shaft 53 and a crushing piece 54.The motor 51 is installed above the crushing tank 1 through the bracket 52, preferably, the bracket 52 is fixed on the top of the crushing tank 1, and the motor 51 is installed on the bracket 52.The upper end of the crushing shaft 53 is connected with the output shaft of the motor 51, the other end extends into the crushing tank 1 and is close to the bottom of the crushing tank 1, preferably, the crushing shaft 53 is vertically arranged and the center axis coincides with the center axis of the crushing tank 1.The crushing piece 54 is located in the crushing tank 1 and is used for crushing the tobacco in the crushing tank 1, and the crushing piece 54 is detachably installed on the crushing shaft 53.

[0049] Preferably, the crushing member 54 comprises a sleeve 541 and a blade 542. The sleeve 541 is sleeved on the crushing shaft 53 and is bolted or screwed with the crushing shaft 53. Specifically, the sleeve 541 and the crushing shaft 53 are provided with a plurality of threaded holes for mounting bolts or screws around the circumference, so that the bolts or screws are mounted around the circumference of the sleeve 541 and the crushing shaft 53. The blade 542 is provided in plurality, and the plurality of blades 542 are fixed at equal intervals on the circumferential surface of the sleeve 541. Specifically, the blade 542 is provided in three. In order to improve the crushing efficiency, preferably, a plurality of crushing members 54 are fixed on the crushing shaft 53, and the plurality of crushing members 54 are arranged at equal intervals along the axial direction of the crushing shaft 53.

[0050] In the above technical solution, after the motor 51 is started, the crushing shaft 53 drives the blade 542 to rotate in the crushing tank 1, so as to crush the tobacco in the crushing tank 1. The purpose of the detachable crushing member 54 is to facilitate replacement. When the blade 542 needs to be replaced due to serious damage, the crushing member 54 can be removed as a whole and replaced with a new crushing member 54, which is simple and convenient to use.

[0051] The filter cartridge is provided for screening the crushed materials meeting the particle size requirement, ensuring that the particles in the sample solution are finer and more uniformly distributed, and providing a sample with higher consistency for subsequent detection. The filter cartridge is prone to be blocked after a period of use. Therefore, the filter cartridge is detachably installed in the discharge opening 4.

[0052] Preferably, the filter cartridge comprises a filter screen 111 and an inner tube 112. The inner tube 112 is open at both ends, and the filter screen 111 is fixed to one end of the inner tube 112. The inner tube 112 is used to extend into the discharge opening 4, and the outer diameter of the inner tube 112 is consistent with the inner diameter of the discharge opening 4, so that the outer wall of the inner tube 112 is attached to the inner wall of the discharge opening 4. The inner tube 112 is bolted or screwed with the discharge opening 4. Preferably, the inner tube 112 and the discharge opening 4 are provided with a plurality of threaded holes for mounting bolts or screws around the circumference, so that the bolts or screws are mounted around the circumference of the inner tube 112 and the discharge opening 4, thereby installing the inner tube 112 in the discharge opening 4.

[0053] In the above technical solution, when the filter screen 111 needs to be cleaned or replaced, the worker only needs to unscrew the bolts or screws installed on the inner tube 112 and the discharge opening 4, so as to remove the inner tube 112. It is simple and convenient to use, and it can be achieved by external operation without disassembling the upper and lower heads of the crushing tank 1.

[0054] Preferably, the other end of the inner tube 112 relative to the filter screen 111 is provided with a flange 113 for limiting. When the flange 113 contacts the bottom of the discharge opening 4, the filter screen 111 is located at the top of the discharge opening 4.

[0055] The flange 113 is mainly used for limiting, so that the filter screen 111 is located at the connection between the discharge opening 4 and the bottom of the crushing tank 1, facilitating the discharge of the crushed materials.

[0056] Referring to Figures 1-5 The blowing mechanism 7 is used for removing the crushing products attached to the inner wall of the crushing tank 1. The blowing mechanism 7 comprises a ring pipe 71, a blowing nozzle 72 and an air inlet pipe 73. The ring pipe 71 is fixed above the inside of the crushing tank 1, and the ring pipe 71 is a circular ring with the center on the central axis of the crushing shaft 53. The blowing nozzle 72 is installed on the ring pipe 71, and the blowing nozzle 72 is used for blowing the crushing products attached to the inner wall of the crushing tank 1. In order to achieve a good blowing effect, preferably, a plurality of blowing nozzles 72 are arranged along the circumferential direction of the crushing tank 1, and the plurality of blowing nozzles 72 are arranged at equal intervals along the circumferential direction of the crushing tank 1. In order to quickly and effectively blow down the crushing products attached to the inner wall of the crushing tank 1, preferably, the blowing nozzle 72 is arranged at an angle of 10-25°, and specifically 15°, with the inner wall of the crushing tank 1. One end of the air inlet pipe 73 is communicated with the ring pipe 71, and the other end of the air inlet pipe 73 penetrates through the crushing tank 1 and extends outward. The air inlet pipe 73 is used for connecting with an external air supply device (such as an air pump). The external air supply device is a prior art, and its specific structure and working principle are not described herein.

[0057] In the above technical solution, some crushing products will be attached to the inner wall of the crushing tank 1 after each crushing is completed. If not cleaned in time, the crushing products will be more firmly attached. Therefore, the blowing mechanism 7 is arranged for removing the crushing products attached to the inner wall of the crushing tank 1. The blowing mechanism 7 blows the residual materials such as the crushing products and the powder attached after crushing by directional airflow, and the residual materials are stripped and blown to the bottom of the crushing tank 1, so as to avoid the inefficiency of manual cleaning. The blowing program can be started after the crushing operation is completed, so as to prevent the tobacco crushing slag from being more difficult to handle due to the too long standing time, and reduce the difficulty of subsequent cleaning. When blowing, the cover plate 10 on the feeding hopper 6 can be covered, and then a filter bag is sleeved at the discharge port 4, so that the dust-containing gas is filtered by the filter bag and then discharged, and the filter residue is collected in the filter bag.

[0058] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, the modifications are protected by the patent law.

Claims

1. A pulverizing device for pretreatment of tobacco pesticide residue detection, comprising a pulverizing tank (1) and a pulverizing mechanism (5), wherein the pulverizing mechanism (5) is mounted on the pulverizing tank (1), characterized in that: Also includes: A jacket (2) is provided on the outer surface of the pulverizing tank (1), and a cold medium inlet pipe (9) and a cold medium outlet pipe (8) are provided on the jacket (2). The filter cartridge is provided with a feed hopper (6) and a discharge port (4) on the crushing tank (1), and the filter cartridge is installed in the discharge port (4).

2. The pulverizing device for pretreatment of tobacco pesticide residue detection according to claim 1, characterized in that: The feed inlet (4) is located at the bottom of the crushing tank (1), and the filter cartridge is detachably installed inside the feed inlet (4).

3. The pulverizing device for pretreatment of tobacco pesticide residue detection according to claim 2, characterized in that: The filter cartridge includes a filter screen (111) and an inner tube (112). Both ends of the inner tube (112) are open. The filter screen (111) is fixed to one end of the inner tube (112). The inner tube (112) is used to extend into the discharge port (4). The inner tube (112) is bolted or screwed to the discharge port (4).

4. The pulverizing device for pretreatment of tobacco pesticide residue detection according to claim 3, characterized in that: The inner tube (112) is provided with a flange (113) for limiting the position at the other end relative to the filter screen (111). When the flange (113) contacts the bottom of the discharge port (4), the filter screen (111) is located at the top of the discharge port (4).

5. The pulverizing device for pretreatment of tobacco pesticide residue detection according to claim 1, characterized in that: It also includes an air blowing mechanism (7) for removing the pulverized products adhering to the inner wall of the pulverizing tank (1).

6. The pulverizing device for pretreatment of tobacco pesticide residue detection according to claim 5, characterized in that: The blowing mechanism (7) includes a ring pipe (71), a blowing nozzle (72), and an air inlet pipe (73); The annular tube (71) is located above the inside of the pulverizing tank (1), and a purging nozzle (72) is provided on the annular tube (71). The purging nozzle (72) is used to purge the pulverized products adhering to the inner wall of the pulverizing tank (1). One end of the air inlet pipe (73) is connected to the ring pipe (71), and the other end passes through the pulverizing tank (1) and extends outward.

7. The pulverizing device for pretreatment of tobacco pesticide residue detection according to claim 6, characterized in that: Multiple purge nozzles (72) are arranged along the circumferential direction of the pulverizing tank (1), and the multiple purge nozzles (72) are arranged at equal intervals along the circumferential direction of the pulverizing tank (1); The air outlet direction of the purge nozzle (72) forms an angle of 10-25° with the inner wall of the pulverizing tank (1).

8. The pulverizing device for pretreatment of tobacco pesticide residue detection according to claim 1, characterized in that: The crushing mechanism (5) includes a motor (51), a support (52), a crushing shaft (53), and a crushing component (54); The motor (51) is mounted above the grinding tank (1) via the bracket (52). The upper end of the grinding shaft (53) is connected to the output shaft of the motor (51), and the other end extends into the grinding tank (1). The grinding element (54) is located inside the grinding tank (1) and is used to crush the tobacco in the grinding tank (1). The crushing component (54) is detachably mounted on the crushing shaft (53).

9. A pulverizing device for pretreatment of tobacco pesticide residue detection according to claim 8, characterized in that: The crushing component (54) includes a sleeve (541) and a blade (542); The sleeve (541) is sleeved on the crushing shaft (53) and connected to the crushing shaft (53) by bolts or screws, and the blade (542) is fixed on the circumferential surface of the sleeve (541).

10. A pulverizing device for pretreatment of tobacco pesticide residue detection according to claim 1, characterized in that: The feed hopper (6) is located on one side of the top of the crushing tank (1), and the feed hopper (6) is covered with a cover plate (10).

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