A blanking assembly

Abstract

The application discloses a discharging assembly, which comprises a bottom plate, a discharging support fixed on the bottom plate, a discharging support plate installed on the discharging support, a discharging device installed on the discharging support plate, wherein the discharging device comprises a discharging barrel, a storage cavity is arranged in the discharging barrel, a discharging head is installed at the lower end of the discharging barrel, a discharging groove is arranged in the discharging head, a discharging disc is rotatably connected in the discharging groove, and a plurality of discharging protrusions are arranged on the outer wall of the discharging disc; a discharging driving device is arranged and used for driving the discharging disc to rotate; a receiving assembly comprises a receiving rotating piece and a receiving support, the discharging disc is fixed on the output end of the receiving rotating piece, a plurality of receiving test tube grooves are arranged on the receiving support, and test tubes are installed in the receiving test tube grooves. The raw materials to be discharged are stored in the storage cavity, the discharging driving device drives the discharging disc to rotate, and the raw materials fall from the discharging outlet into the test tubes, so that the discharging efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of detection technology, and specifically relates to a feeding component. Background Technology

[0002] With the increasing use of pesticides in fruit and vegetable cultivation, the detection of pesticide residues in fruits and vegetables is becoming increasingly important. Anhydrous magnesium sulfate and sodium chloride are commonly added during the detection process.

[0003] For example, patent CN117804530B discloses a method for rapid detection of pesticide residues by low-pressure gas chromatography-tandem mass spectrometry. In the detection process, 4g of anhydrous magnesium sulfate and 1g of sodium chloride need to be added to the test tube. However, the current method requires manual weighing before adding, which is inefficient. Summary of the Invention

[0004] The purpose of this invention is to provide a feeding component that can increase feeding efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a feeding assembly, comprising:

[0006] Base plate;

[0007] A material feeding bracket, which is fixed to the base plate;

[0008] A material feeding bracket plate, wherein the material feeding bracket plate is mounted on the material feeding bracket;

[0009] A feeding device is mounted on a feeding support plate. The feeding device includes a feeding barrel body with a storage cavity inside. A feeding head is installed at the lower end of the feeding barrel body. A feeding groove is provided inside the feeding head. The feeding groove includes a feeding inlet and a feeding outlet. The feeding inlet is connected to the storage cavity. A feeding disc is rotatably connected inside the feeding groove. A plurality of feeding protrusions are evenly distributed around the circumference of the feeding disc on the outer wall of the feeding disc. An arc-shaped groove is provided on the inner wall of the feeding groove. Some of the feeding protrusions abut against the inner wall of the arc-shaped groove.

[0010] A feeding drive device, wherein the feeding drive device is used to drive the feeding disc to rotate;

[0011] The receiving assembly includes a receiving rotating component and a receiving bracket. The receiving rotating component is fixed on the base plate, and the receiving bracket is fixed on the output end of the receiving rotating component. The receiving bracket is provided with a plurality of receiving test tube slots, which are evenly distributed around the axis of the receiving bracket. Test tubes are installed in the receiving test tube slots, and the receiving rotating component drives the test tubes to move one by one to below the discharge outlet.

[0012] Furthermore, the feeding protrusion is configured as a brush.

[0013] Furthermore, a vertical plate for the feeding support is fixed on the feeding support plate, and the feeding tray is rotatably connected to the feeding trough through a feeding shaft. A feeding driven gear is fixed at one end of the feeding shaft extending out of the feeding head. The feeding drive device includes a feeding drive motor and a feeding drive gear. The feeding drive motor is fixed on the vertical plate of the feeding support, and the feeding drive gear is fixed on the shaft of the feeding drive motor. The feeding drive gear meshes with the feeding driven gear.

[0014] Furthermore, a stirring base plate is fixed to the upper end of the feeding barrel, and a stirring shaft is rotatably connected to the stirring base plate. A stirring component is installed on the part of the stirring shaft located in the storage cavity. A stirring driven gear is fixed to one end of the stirring shaft extending out of the stirring base plate. A stirring drive motor is fixed on the feeding support plate, and a stirring drive gear is fixed on the shaft of the stirring drive motor. The stirring drive gear meshes with the stirring driven gear.

[0015] Furthermore, two feeding supports are fixed at the lower end of the feeding barrel, and each feeding support is fixed with a feeding limit pin. The feeding head is provided with a feeding limit groove for the feeding limit pin to be inserted.

[0016] Furthermore, the feeding support plate is provided with a feeding groove, and two feeding fixing blocks are fixed on the feeding support plate. The two feeding fixing blocks are located on both sides of the feeding groove. The feeding fixing blocks are provided with feeding slots, and the stirring base plate is fixed with insertion protrusions that are inserted into the feeding slots.

[0017] Furthermore, it also includes a pressing and rotating device. A feeding pressing rod is rotatably connected to the vertical plate of the feeding bracket. The feeding pressing rod has a pressing state and an unlocking state. In the pressing state, the feeding pressing rod is located on the side of the feeding barrel facing away from the feeding groove. In the unlocking state, the feeding pressing rod rotates away from the feeding barrel. The pressing and rotating device drives the feeding pressing rod to rotate.

[0018] Furthermore, it also includes a position switching motor. The feeding support plate is connected to the feeding support via the position switching motor. The position switching motor is fixed on the feeding support. The feeding support plate is fixedly connected to the output end of the position switching motor. The feeding support plate includes a feeding position and an avoidance position. When the feeding position is in the feeding position, the feeding outlet is located above one of the test tubes. When the avoidance position is in the avoidance position, there are no parts above the receiving support.

[0019] Furthermore, the feeding support plate also includes a replacement state, in which the feeding barrel is located outside the bottom plate.

[0020] Furthermore, an output bracket is fixed on the output end of the receiving rotating component, and the receiving bracket and the output bracket are detachably connected.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) Place the raw materials (anhydrous magnesium sulfate or sodium chloride, etc.) that need to be fed into the storage chamber of the feeding barrel, place the test tubes that need the raw materials below the feeding outlet, and then the feeding drive device drives the feeding disc to rotate. The feeding protrusion can carry the raw materials to the feeding outlet. The raw materials fall from the feeding outlet into the test tubes. The receiving rotating part can drive the receiving bracket to rotate, thereby moving the test tubes one by one to the bottom of the feeding outlet for feeding. The efficiency is very high.

[0023] (2) The stirring drive motor drives the stirring drive gear to rotate, the stirring drive gear drives the stirring driven gear to rotate, thereby driving the stirring shaft to rotate, the stirring shaft drives the stirring component to rotate, and the stirring component can play the role of stirring the raw materials in the feeding bucket.

[0024] (3) When it is necessary to add raw materials to the storage cavity, the plug-in protrusion can be moved out of the feeding slot. At this time, the stirring drive gear and the stirring driven gear are separated, and the feeding drive gear and the feeding driven gear are also separated. Then the entire feeding barrel can be taken off. Then the feeding limit pin is moved out of the feeding limit groove, and the feeding head can be disassembled. Then the raw materials can be put into the feeding barrel. After putting them in, the feeding head can be installed.

[0025] (4) Insert the protrusion into the feeding slot to install the feeding barrel in place. The clamping and rotating device drives the feeding clamping rod to rotate, so that the feeding clamping rod abuts against the side of the feeding barrel opposite the feeding groove, thus restricting the position of the feeding barrel and preventing it from moving. When it is necessary to disassemble the feeding barrel, the feeding clamping rod rotates away from the feeding barrel, and the feeding barrel can be removed.

[0026] (5) The receiving bracket and the output bracket are detachably connected, so that test tubes can be placed on the entire output bracket and then installed on the output bracket for unloading. After unloading, the entire output bracket can be disassembled, which is very efficient.

[0027] (6) The feeding bracket plate includes feeding position, avoidance position and replacement state, which can facilitate the disassembly and assembly of the receiving bracket and the replacement of the feeding barrel. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a feeding device according to the present invention;

[0029] Figure 2 for Figure 1 Top view;

[0030] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0031] Figure 4 for Figure 3 A magnified view of a section at point I;

[0032] Figure 5 for Figure 3 Enlarged view of section II in the middle;

[0033] Figure 6 for Figure 2 Cross-sectional view at point BB;

[0034] Figure 7 for Figure 6 A magnified view of a section at point III;

[0035] Figure 8 This is a partial structural diagram of the feeding assembly;

[0036] Figure 9 for Figure 8 Top view;

[0037] Figure 10 for Figure 9 Cross-sectional view at point C;

[0038] Figure 11 for Figure 9 Cross-sectional view at point DD;

[0039] Figure 12 for Figure 9 Cross-sectional view at EE.

[0040] In the diagram: 1. Base plate; 2. Test tube;

[0041] 101. Feeding device; 102. Feeding support; 103. Feeding barrel; 104. Storage cavity; 105. Feeding head; 106. Feeding trough; 107. Feeding inlet; 108. Feeding outlet; 109. Feeding tray; 110. Feeding protrusion; 111. Arc-shaped groove; 112. Feeding shaft; 113. Feeding driven gear; 114. Feeding drive motor; 115. Feeding drive gear; 116. Stirring base plate; 117. Stirring shaft; 118. Stirring driven gear; 119. 120. Stirring drive motor; 121. Stirring drive gear; 122. Discharge support; 123. Discharge limit pin; 124. Discharge limit groove; 125. Discharge bracket plate; 126. Discharge groove; 127. Discharge fixing block; 128. Discharge slot; 129. Insertion protrusion; 130. Conical inclined bar; 131. Discharge clamping rod; 132. Clamping cylinder; 133. Conical groove; 134. U-shaped rod; 135. Conical crossbar; 136. Discharge bracket vertical plate; 137. Position switching motor;

[0042] 201. Receiving assembly; 202. Receiving rotating part; 203. Receiving bracket; 204. Receiving test tube groove; 205. Output bracket; 206. Output through hole; 207. Output protruding ring; 208. Receiving connection hole; 209. Disassembly indexing pin; 210. Button; 211. Ball bearing. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Please see Figures 1-12 This invention provides a technical solution for a feeding component.

[0045] A feeding assembly, comprising:

[0046] Base plate 1;

[0047] The material feeding bracket 102 is fixed on the base plate 1;

[0048] The material feeding bracket plate 124 is mounted on the material feeding bracket 102;

[0049] The feeding device 101 is mounted on the feeding support plate 124. The feeding device 101 includes a feeding barrel 103, a storage cavity 104 inside the feeding barrel 103, a feeding head 105 installed at the lower end of the feeding barrel 103, a feeding groove 106 inside the feeding head 105, the feeding groove 106 includes a feeding inlet 107 and a feeding outlet 108, the feeding inlet 107 and the storage cavity 104 are connected, a feeding disc 109 is rotatably connected inside the feeding groove 106, a plurality of feeding protrusions 110 are evenly distributed around the circumference of the feeding disc 109 on the outer wall of the feeding disc 109, an arc groove 111 is provided on the inner wall of the feeding groove 106, some of the feeding protrusions 110 abut against the inner wall of the arc groove 111, and the feeding protrusions 110 separate the feeding inlet 107 and the feeding outlet 108.

[0050] The feeding drive device is used to drive the feeding disc 109 to rotate.

[0051] The receiving assembly 201 includes a receiving rotating component 202 and a receiving bracket 203. The receiving rotating component 202 is fixed on the base plate 1, and the receiving bracket 203 is fixed on the output end of the receiving rotating component 202. The receiving bracket 203 is provided with a plurality of receiving test tube slots 204, which are evenly distributed around the axis of the receiving bracket 203. Test tubes 2 are installed in the receiving test tube slots 204. The receiving rotating component 202 drives the test tubes 2 to move one by one to below the discharge outlet 108. The receiving rotating component 202 is set as an indexing plate, which is an existing component.

[0052] The raw materials to be fed (such as anhydrous magnesium sulfate or sodium chloride) are placed into the storage chamber 104 of the feeding barrel 103. At this time, some raw materials will be located between the upper feeding protrusions 110. The test tube 2 containing the raw materials is placed below the feeding outlet 108. Then, the feeding drive device drives the feeding tray 109 to rotate, and the feeding protrusions 110 can carry the raw materials to the feeding outlet 108. The raw materials fall from the feeding outlet 108 into the test tube 2. The weight of the raw materials output after one rotation of the feeding tray 109 is detected in advance, so that the number of rotations can be adjusted according to the weight of the raw materials. One feeding device 101 corresponds to one type of raw material, so that various raw materials can be output quickly. The receiving rotating component 202 can drive the receiving bracket 203 to rotate, thereby moving the test tubes 2 one by one below the feeding outlet 108 for feeding, which is very efficient.

[0053] like Figure 7 As shown, the feeding protrusion 110 is set as a brush, which can convey raw materials with relatively high precision.

[0054] like Figures 5-12As shown, a vertical plate 135 is fixed on the feeding support plate 124. The feeding tray 109 is rotatably connected to the feeding groove 106 through the feeding shaft 112. A feeding driven gear 113 is fixed at one end of the feeding shaft 112 extending out of the feeding head 105. The feeding drive device includes a feeding drive motor 114 and a feeding drive gear 115. The feeding drive motor 114 is fixed on the vertical plate 135 of the feeding support, and the feeding drive gear 115 is fixed on the shaft of the feeding drive motor 114. The feeding drive gear 115 meshes with the feeding driven gear 113.

[0055] The feeding drive motor 114 drives the feeding drive gear 115 to rotate, and the feeding drive gear 115 drives the feeding driven gear 113 to rotate, thereby driving the feeding disc 109 to rotate to realize feeding.

[0056] In order to stir the raw materials in the feeding barrel 103, such as Figures 5-12 As shown, a stirring base plate 116 is fixed to the upper end of the feeding barrel 103. A stirring shaft 117 is rotatably connected to the stirring base plate 116. A stirring component is installed on the part of the stirring shaft 117 located in the storage cavity 104. A stirring driven gear 118 is fixed to one end of the stirring shaft 117 that extends out of the stirring base plate 116. A stirring drive motor 119 is fixed on the feeding support plate 124. A stirring drive gear 120 is fixed on the shaft of the stirring drive motor 119. The stirring drive gear 120 meshes with the stirring driven gear 118.

[0057] The stirring drive motor 119 drives the stirring drive gear 120 to rotate, the stirring drive gear 120 drives the stirring driven gear 118 to rotate, thereby driving the stirring shaft 117 to rotate, the stirring shaft 117 drives the stirring component to rotate, and the stirring component can play the role of stirring the raw materials in the feeding barrel 103.

[0058] like Figures 5-12 As shown, two feeding supports 121 are fixed at the lower end of the feeding barrel 103. Each feeding support 121 is fixed with a feeding limit pin 122. The feeding head 105 is provided with a feeding limit groove 123 for the feeding limit pin 122 to be inserted.

[0059] When the feeding limit pin 122 is inserted into the feeding limit groove 123, the feeding head 105 can be connected to the feeding barrel 103. When it is necessary to remove the feeding head 105, simply move the feeding limit pin 122 out of the feeding limit groove 123.

[0060] The unloading limit pin 122 is set as an indexing pin, which is an existing component. The indexing pin is fixed on the unloading support 121. The inner end of the indexing pin can be moved out of the unloading limit groove 123 simply by pulling the outer end of the indexing pin outward. When the outer end of the indexing pin is released, its inner end will return to its original position and insert into the unloading limit groove 123.

[0061] like Figures 5-12 As shown, the feeding support plate 124 is provided with a feeding groove 125, and two feeding fixing blocks 126 are fixed on the feeding support plate 124. The two feeding fixing blocks 126 are located on both sides of the feeding groove 125. The feeding fixing blocks 126 are provided with feeding slots 127, and the stirring plate 116 is fixed with a plugging protrusion 128 that plugs into the feeding slot 127.

[0062] Using the above method, when the insertion protrusion 128 is inserted into the feeding slot 127, the upper end of the feeding barrel 103 is inserted into the feeding groove 125. The stirring drive gear 120 meshes with the stirring driven gear 118, and the feeding drive gear 115 meshes with the feeding driven gear 113. This indicates that feeding and stirring actions can be performed. When it is necessary to add raw materials to the storage cavity 104, the insertion protrusion 128 can be moved out of the feeding slot 127. At this time, the stirring drive gear 120 and the stirring driven gear 118 separate, and the feeding drive gear 115 and the feeding driven gear 113 also separate. Then, the entire feeding barrel 103 can be removed. Then, the feeding limit pin 122 is moved out of the feeding limit groove 123, and the feeding head 105 can be disassembled. Then, raw materials can be put into the feeding barrel 103. After putting them in, the feeding head 105 can be installed.

[0063] Using the above method, the feeding barrel 103 can also be replaced with different raw materials. A feeding bracket 102, a feeding drive device, a stirring drive motor 119 and a stirring drive gear 120 can be adapted to the feeding barrel 103 of different raw materials.

[0064] like Figure 5 As shown, the feeding device 101 also includes a pressing and rotating device. A feeding pressing rod 130 is rotatably connected to the feeding bracket vertical plate 135. The feeding pressing rod 130 has a pressing state and an unlocking state. In the pressing state, the feeding pressing rod 130 is located on the side of the feeding barrel 103 away from the feeding groove 125. In the unlocking state, the feeding pressing rod 130 rotates away from the feeding barrel 103, and the pressing and rotating device drives the feeding pressing rod 130 to rotate.

[0065] like Figure 5 As shown, the insertion protrusion 128 is inserted into the feeding slot 127 to install the feeding barrel 103 into place. The clamping rotation device drives the feeding clamping rod 130 to rotate, causing the feeding clamping rod 130 to abut against the side of the feeding barrel 103 opposite to the feeding groove 125, thus restricting the position of the feeding barrel 103 and preventing it from moving. When it is necessary to remove the feeding barrel 103, the feeding clamping rod 130 rotates away from the feeding barrel 103, allowing the feeding barrel 103 to be removed.

[0066] like Figure 5As shown, the clamping and rotating device is configured as a clamping cylinder 131. The housing of the clamping cylinder 131 is rotatably connected to the unloading support plate 124, and the piston rod of the clamping cylinder 131 is rotatably connected to the unloading clamping rod 130. The extension and retraction of the piston rod of the clamping cylinder 131 can drive the unloading clamping rod 130 to rotate.

[0067] like Figures 5-12 As shown, the upper end of the discharge head 105 is provided with a conical groove 132. The stirring component includes a U-shaped rod 133 and a conical rod. The two ends of the U-shaped rod 133 are fixedly connected to the stirring shaft 117. The U-shaped rod 133 is located inside the storage cavity 104. The conical rod includes a conical crossbar 134 and a conical inclined rod 129. The conical crossbar 134 is fixedly connected to the stirring shaft 117. The conical inclined rod 129 is located inside the conical groove 132, and the inclination angle of the conical inclined rod 129 is the same as that of the conical groove 132. When the stirring shaft 117 rotates, the U-shaped rod 133 and the conical rod can stir the raw materials in the storage cavity 104 and the conical groove 132.

[0068] like Figure 4 As shown, an output bracket 205 is fixed on the output end of the receiving rotating component 202, and the receiving bracket 203 is detachably connected to the output bracket 205. This allows the test tube 2 to be placed on the entire output bracket 205 for unloading, and the entire output bracket 205 can be disassembled after unloading, which is very efficient.

[0069] like Figure 4 As shown, the output bracket 205 has two output through holes 206, and an output protruding ring 207 is provided inside the output through hole 206. The receiving bracket 203 has two receiving connection holes 208. The two output through holes 206 and the two receiving connection holes 208 correspond one-to-one. A disassembly indexing pin 209 is fixed on the receiving connection hole 208. The disassembly indexing pin 209 is also a conventional component. This indexing pin includes a button 210 and a ball 211. When the button 210 is pressed, the ball 211 is no longer limited, allowing the limiting end of the disassembly indexing pin 209 to pass through the output protruding ring 207. Then, when the button 210 is released, the position of the ball 211 is restricted, and the ball 211 is positioned below the output protruding ring 207, thereby connecting the output bracket 205 and the receiving bracket 203 together. When it is necessary to disassemble the receiving bracket 203, simply press the button 210.

[0070] like Figure 3 and Figure 5As shown, the unloading assembly also includes a position switching motor 136. The unloading support plate 124 is connected to the unloading support 102 via the position switching motor 136. The position switching motor 136 is fixed on the unloading support 102. The unloading support plate 124 is fixedly connected to the output end of the position switching motor 136. The unloading support plate 124 includes an unloading position and an avoidance position. In the unloading position ( Figure 3 (State), the discharge outlet 108 is located above one of the test tubes 2. During the process of changing the discharge position to the avoidance position, the discharge support plate 124 moves inward to the base plate 1. In the avoidance position, there are no parts above the receiving support 203, which facilitates the assembly and disassembly of the receiving support 203.

[0071] The feeding support plate 124 also includes a replacement state. In the replacement state, the feeding barrel 103 is located outside the base plate 1. Since the feeding barrel 103 is located outside the base plate 1 at this time, it is convenient to replace the feeding barrel 103.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding assembly, characterized in that, include: Base plate; A feeding bracket, which is fixed to the base plate; a feeding bracket plate, which is mounted on the feeding bracket; A feeding device is mounted on a feeding support plate. The feeding device includes a feeding barrel body with a storage cavity inside. A feeding head is installed at the lower end of the feeding barrel body, and a feeding trough is provided inside the feeding head. The feeding trough includes a feeding inlet and a feeding outlet, the feeding inlet communicating with the storage cavity. A feeding disc is rotatably connected inside the feeding trough. The outer wall of the feeding disc has several feeding protrusions evenly distributed around its circumference. The inner wall of the feeding trough has an arc-shaped groove. Some of the feeding protrusions are connected to the storage cavity. The inner wall of the arc-shaped groove abuts against the material; a feeding drive device is used to drive the feeding disc to rotate; a receiving assembly includes a receiving rotating component and a receiving bracket, the receiving rotating component is fixed on the base plate, the receiving bracket is fixed on the output end of the receiving rotating component, the receiving bracket is provided with a plurality of receiving test tube slots, the plurality of receiving test tube slots are evenly distributed around the axis of the receiving bracket, the test tubes are installed in the receiving test tube slots, and the receiving rotating component drives the test tubes to move one by one to below the feeding outlet; A vertical plate is fixed on the feeding support plate. The feeding tray is rotatably connected to the feeding trough via a feeding shaft. A feeding driven gear is fixed at one end of the feeding shaft extending out of the feeding head. The feeding drive device includes a feeding drive motor and a feeding drive gear. The feeding drive motor is fixed on the vertical plate of the feeding support plate, and the feeding drive gear is fixed on the shaft of the feeding drive motor. The feeding drive gear meshes with the feeding driven gear. The feeding support plate is provided with a feeding groove, and two feeding fixing blocks are fixed on the feeding support plate. The two feeding fixing blocks are located on both sides of the feeding groove. The feeding fixing blocks are provided with feeding slots, and the stirring plate is fixed with insertion protrusions that are inserted into the feeding slots. It also includes a pressing and rotating device. A feeding pressing rod is rotatably connected to the vertical plate of the feeding bracket. The feeding pressing rod has a pressing state and an unlocking state. In the pressing state, the feeding pressing rod is located on the side of the feeding barrel facing away from the feeding groove. In the unlocking state, the feeding pressing rod rotates away from the feeding barrel. The pressing and rotating device drives the feeding pressing rod to rotate.

2. The feeding assembly according to claim 1, characterized in that, The feeding protrusion is configured as a brush.

3. The feeding assembly according to claim 1, characterized in that, A stirring base plate is fixed to the upper end of the feeding barrel. A stirring shaft is rotatably connected to the stirring base plate. A stirring component is installed on the part of the stirring shaft located in the storage cavity. A stirring driven gear is fixed to one end of the stirring shaft extending out of the stirring base plate. A stirring drive motor is fixed on the feeding support plate. A stirring drive gear is fixed on the shaft of the stirring drive motor. The stirring drive gear meshes with the stirring driven gear.

4. The feeding assembly according to claim 3, characterized in that, Two feeding supports are fixed at the lower end of the feeding barrel, and each feeding support is fixed with a feeding limit pin. The feeding head is provided with a feeding limit groove for the feeding limit pin to be inserted.

5. The feeding assembly according to claim 1, characterized in that, It also includes a position switching motor. The feeding support plate is connected to the feeding support via the position switching motor. The position switching motor is fixed on the feeding support. The feeding support plate is fixedly connected to the output end of the position switching motor. The feeding support plate includes a feeding position and an avoidance position. In the feeding position, the feeding outlet is located above one of the test tubes. In the avoidance position, there are no parts above the receiving support.

6. A feeding assembly according to claim 5, characterized in that, The feeding support plate also has a replaceable state, in which the feeding barrel is located outside the base plate.

7. The feeding assembly according to claim 1, characterized in that, An output bracket is fixed on the output end of the receiving rotating component, and the receiving bracket and the output bracket are detachably connected.

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