A sampling and testing device for pre-prepared food products

Abstract

The present invention relates to the technical field of pre-prepared food detection, and in particular to a sampling and detection device for pre-prepared food products, comprising a sampling and detection mechanism, which comprises a detection frame, and a processing box arranged above the detection frame, a grinding cylinder is arranged above the processing box, and also comprises a pre-treatment component arranged in the processing box and the grinding cylinder for pre-treatment of the pre-prepared food before detection, and a support frame arranged on the right side of the processing box, wherein an intermittent titration component for auxiliary titration of a potassium permanganate solution is arranged inside the support frame. The present invention can reduce other interferences to the pre-prepared food samples during the processing process through the integrated design between the grinding cylinder and the processing box, thereby improving the detection efficiency of the pre-prepared food, and at the same time, the grinding head and the stirring blade on the transmission rod work simultaneously, thereby improving the pre-treatment efficiency of solid pre-prepared food.

Description

Technical Field

[0001] The invention relates to the technical field of pre-prepared food detection, in particular to a pre-prepared food product sampling and detection device. Background Art

[0002] In the actual production process, due to the complexity of raw material sources, the uncontrollability of the production process and the diversity of storage conditions, some preservatives may remain or be accidentally added to food. The presence of these preservatives may pose a threat to consumers' health. Therefore, it is particularly important to strictly test preservatives in pre-prepared meals and other foods.

[0003] However, the detection of preservatives in solid prepared dishes usually involves complex sample pretreatment steps, which is not only time-consuming but also easily interfered by other factors, resulting in inaccurate test results, thereby affecting the detection time and efficiency of the prepared dishes.

[0004] In addition, although the traditional potassium permanganate titration method for detecting preservatives has the advantages of simple operation and low cost, there are also some problems in the actual operation process. For example, the manual control of the titration process is easily affected by human factors such as fatigue and tension, resulting in unstable titration operation and the inability to titrate continuously and evenly, which not only affects the accuracy of the test results, but also increases the workload of the testers.

[0005] Finally, in the traditional titration operation, whenever the potassium permanganate solution in the burette is exhausted, the inspector often needs to stop the work in hand, remove the burette, and re-add new potassium permanganate solution. This process is not only cumbersome, but also easy to introduce errors, because each time the potassium permanganate solution is added, the amount of potassium permanganate added may be inaccurate due to improper operation, and thus the quantitative addition of potassium permanganate solution cannot be guaranteed. In order to solve the above problems, the present invention proposes a sampling and detection device for pre-prepared food products. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a sampling and detection device for pre-prepared food products to solve the problem mentioned in the background technology that in the process of solid pre-prepared food preservative detection, complicated pre-prepared food sample pretreatment steps are usually involved, which is not only time-consuming, but also easily interfered by other factors, resulting in inaccurate detection results, thereby affecting the detection time and detection efficiency of pre-prepared food. In addition, although the traditional potassium permanganate titration method for detecting preservatives has the advantages of simple operation and low cost, it also has some problems in the actual operation process. For example, the manual control of the titration process is easily affected by human factors such as fatigue and tension, resulting in unstable titration operation, and it may not be possible to titrate continuously and evenly, which will not only affect the accuracy of the test results, but also increase the workload of the test personnel. Finally, in the traditional titration operation, whenever the potassium permanganate solution in the burette is exhausted, the test personnel often need to stop the work in their hands, remove the burette, and re-add new potassium permanganate solution. This process is not only cumbersome, but also prone to errors, because each time the potassium permanganate solution is added, the amount of potassium permanganate added may be inaccurate due to improper operation, and thus the problem of quantitative addition of the potassium permanganate solution cannot be guaranteed.

[0007] Therefore, an object of the present invention is to provide a sampling and testing device for pre-prepared food products.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a sampling and testing device for pre-prepared food products, comprising a sampling and testing mechanism, which includes a testing frame and a processing box arranged above the testing frame, a grinding cylinder is arranged above the processing box, and also includes a pretreatment component arranged in the processing box and the grinding cylinder for pre-treating the pre-prepared food before testing, and a support frame arranged on the right side of the processing box, an intermittent titration component for auxiliary titration of potassium permanganate solution is arranged inside the support frame, a shaking component for shaking the pre-prepared food sample solution is arranged above the testing frame, a testing auxiliary mechanism is arranged on the side of the support frame away from the processing box, the testing auxiliary mechanism includes a testing solution adding component arranged above the support frame for adding potassium permanganate solution to the intermittent titration component, and an auxiliary supplement component arranged above the support frame for supplementing potassium permanganate solution to the testing solution adding component.

[0009] As a preferred solution of the sampling and detection device for pre-prepared food products of the present invention, the pre-treatment component includes a grinding chamber arranged inside the grinding cylinder, and the cross-section of the grinding chamber is funnel-shaped, a grinding head is arranged above the grinding chamber, a rotating motor is arranged above the grinding head, a transmission rod is installed at the output end of the rotating motor, the transmission rod is connected through the grinding head, the inner cavity of the processing box is provided with a filter screen, the lower end of the transmission rod passes through the filter screen and a plurality of stirring blades are detachably installed, the upper end of the processing box is connected to a liquid inlet pipe, the lower end of the processing box is connected to a discharge channel, and a storage box is arranged below the discharge channel.

[0010] As a preferred solution of the pre-prepared food product sampling and detection device of the present invention, wherein: the upper part of the grinding head is arc-shaped, and the gap between the edge of the grinding head and the inner wall of the grinding chamber gradually decreases from top to bottom, a bracket is welded on the side of the grinding cylinder close to the support frame, the upper end of the rotating motor is detachably connected to the bracket, the discharge end of the grinding cylinder is connected to a conveying channel, and the other end of the conveying channel is connected to the feed end of the processing box.

[0011] As a preferred solution of the pre-prepared food product sampling and detection device of the present invention, the intermittent titration component includes a servo motor arranged on the detection frame, a screw is installed at the output end of the servo motor, a fixed frame is slidably installed on the side of the detection frame away from the processing box, a connecting rod is arranged on the side of the fixed frame close to the processing box, a straight rod is arranged on the side of the fixed frame away from the connecting rod, a connecting frame is arranged on the upper end of the connecting rod, and a rack is arranged on the side of the connecting frame close to the processing box, a burette body is arranged inside the support frame, a first stopcock is arranged below the burette body, a gear is arranged on the side of the first stopcock away from the processing box, and the gear is fixedly connected to the handle of the first stopcock.

[0012] As a preferred solution of the pre-prepared food product sampling and detection device of the present invention, wherein: a screw rod sleeve is fixedly installed in the middle of the fixed frame, the size of the screw rod is adapted to the size of the screw rod sleeve, and the screw rod is threadedly connected to the screw rod sleeve, an electromagnet is fixedly installed on the upper end of the connecting rod, and the other end of the electromagnet is fitted with the lower end of the connecting frame, the rack is arranged on the rear side of the gear, and the rack is meshed with the gear, rubber pressure plates are arranged on the front and rear sides of the burette body, and a screw rod is rotatably installed on the outer side of the rubber pressure plate through a bearing, the screw rod is spirally connected to the support frame, a first slide groove is opened on the rear side of the connecting frame, a first slider is fixedly installed on the side of the support frame close to the first slide groove, and the first slider is slidably connected to the first slide groove.

[0013] As a preferred solution of the pre-prepared food product sampling and detection device of the present invention, the shaking assembly includes a pushing frame arranged on the storage box, a second slider is arranged at the lower end of the pushing frame, a second slide groove is opened at the upper end of the detection frame, the second slider is slidably connected to the second slide groove, a return spring is fixedly installed in the inner cavity of the second slide groove, the other end of the return spring is fixedly connected to the second slider, a cam rod is fixedly installed at the lower end of the screw rod, and the cam rod is arranged on one side of the pushing frame.

[0014] As a preferred solution of the pre-prepared food product sampling and testing device of the present invention, the testing solution adding component includes a cylinder arranged above the testing frame, a lower pressure frame is arranged on the side of the cylinder away from the burette body, a positioning pin is penetrated through the lower end of the lower pressure frame, a limiting groove is provided on the side of the straight rod close to the positioning pin, the size of the positioning pin is matched with the size of the limiting groove, and the positioning pin is movably connected to the limiting groove, a piston head is detachably installed on the upper end of the lower pressure frame, the size of the piston head is matched with the inner cavity size of the cylinder, the piston head is arranged above the cylinder, the infusion end of the cylinder is connected with a first delivery tube, a second stopcock is arranged in the middle of the first delivery tube, and the end of the first delivery tube is connected with the upper end of the burette body.

[0015] As a preferred solution of the pre-prepared food product sampling and detection device of the present invention, the auxiliary supplementary component includes a box body arranged above the cylinder body, the lower end of the box body is connected to a second delivery pipe, the end of the second delivery pipe is connected to the liquid inlet end of the cylinder body, a third stopcock is arranged in the middle of the second delivery pipe, and a liquid inlet is arranged at the upper end of the box body.

[0016] The beneficial effects of the pre-prepared food product sampling and detection device of the present invention: the present invention can reduce other interferences to the pre-prepared food samples during the processing process through the integrated design between the grinding cylinder and the processing box, thereby improving the detection efficiency of the pre-prepared food, and at the same time, the grinding head and the stirring blades on the transmission rod work simultaneously, thereby improving the pretreatment efficiency of solid pre-prepared food.

[0017] The rack on the connecting frame can also drive the gear to rotate, and then the gear drives the first stopcock to rotate, so as to achieve the opening and closing operation of the burette body for titration by mechanical control, thereby avoiding the situation that the titration operation is unstable and the titration cannot be uniformly titrated in manual titration. At the same time, due to the cooperation of the gear and the rack, the rotation angle of the first stopcock is guaranteed to be constant, so as to achieve the control of the outflow speed and titration amount of the potassium permanganate solution to be constant, thereby achieving the effect of uniform titration, thereby ensuring the accuracy of the detection result, and the pushing frame can be reciprocated left and right, thereby driving the sample solution in the storage box to shake slightly left and right, thereby promoting the reactant in the sample solution to be fully mixed and contacted with the potassium permanganate solution, thereby improving the reaction rate, thereby improving the accuracy and sensitivity of the detection.

[0018] The piston head on the lower pressure frame can also be moved downward to reduce the volume in the cylinder and increase the air pressure, thereby pushing the potassium permanganate solution in the cylinder out and discharging it into the burette main body through the first delivery pipe, thereby achieving the addition of the potassium permanganate solution in the burette main body, eliminating the trouble of staff disassembling the burette main body to add the potassium permanganate solution, and the displacement distance of the piston head is constant, thereby ensuring that the amount of potassium permanganate added to the burette main body is constant, thereby avoiding the error of manual disassembly and addition by the staff, thereby improving the detection efficiency and accuracy of solid pre-prepared dishes.

[0019] Negative pressure can also be formed to draw the potassium permanganate solution in the box into the cylinder, so as to replenish the potassium permanganate solution in the cylinder, which is convenient for adding the potassium permanganate solution into the burette body next time. Moreover, the connecting rod on the fixed frame does not move after contacting the electromagnet, thereby ensuring that the potassium permanganate solution drawn into the cylinder is also constant, further reducing the error caused by the addition of the potassium permanganate solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the left view of the sampling and testing device for pre-prepared food products.

[0022] Figure 2 This is a schematic diagram of the right side structure of the sampling and detection device for pre-prepared food products.

[0023] Figure 3 This is a schematic diagram of the top view of the structure of the sampling and detection device for pre-prepared food products.

[0024] Figure 4 This is a schematic diagram of the internal structure of a sampling and testing device for pre-prepared food products.

[0025] Figure 5 This is a schematic diagram of the structure of the pre-processing component of the pre-prepared food product sampling and testing device.

[0026] Figure 6 This is a schematic diagram of the structure of the intermittent titration component of the pre-prepared food product sampling and testing device.

[0027] Figure 7 Schematic diagram of the structure of the detection solution adding component of the pre-prepared food product sampling and detection device.

[0028] Figure 8 Sampling and testing device for pre-prepared food products Figure 7 Enlarged view of point A.

[0029] Fig. 9 This is a schematic diagram of the top view of the support frame and burette body of the pre-prepared food product sampling and testing device.

[0030] Fig.10 This is a schematic diagram of the storage box and push rack structure of the pre-prepared food product sampling and testing device.

[0031] Label: 100, sampling and testing mechanism; 101, testing frame; 102, processing box; 103, grinding cylinder; 104, grinding chamber; 105, grinding head; 106, bracket; 107, rotating motor; 108, transmission rod; 109, conveying channel; 110, filter screen; 111, liquid inlet pipe; 112, stirring blade; 113, discharge channel; 114, storage box; 115, servo motor; 116, screw rod; 117, fixing frame; 118, connecting rod; 119, straight rod; 120, screw rod sleeve; 121, connecting frame; 122, rack; 123, electromagnet; 124, Support frame; 125, first slider; 126, first slide groove; 127, burette body; 128, first stopcock; 129, gear; 130, rubber pressure plate; 131, second slide groove; 132, push frame; 133, second slider; 134, return spring; 135, cam rod; 200, detection auxiliary mechanism; 201, cylinder; 202, lower pressure frame; 203, limit groove; 204, positioning pin; 205, piston head; 206, first delivery pipe; 207, second stopcock; 208, box body; 209, second delivery pipe; 210, third stopcock; 211, liquid inlet. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Example 1, reference Figures 1 to 5 , which is the first embodiment of the present invention, and provides a sampling and testing device for pre-prepared food products, which can realize the rapid pre-processing operation of pre-prepared food samples, and reduce the interference of pre-prepared food samples during the processing, thereby improving the detection efficiency of pre-prepared food, and at the same time, mechanized intermittent titration is performed by mechanically controlling the burette, thereby ensuring the titration detection effect and the accuracy of the detection result, including a sampling and testing mechanism 100, which includes a detection frame 101, and a processing box 102 arranged above the detection frame 101, a grinding cylinder 103 is arranged above the processing box 102, and also includes a processing box 102 and a grinding cylinder 103 arranged in the processing box 102 and the grinding cylinder 103 for pre-prepared food. A pretreatment component for pretreatment before detection is provided, and a support frame 124 is arranged on the right side of the processing box 102, the interior of the support frame 124 is provided with an intermittent titration component for auxiliary titration of potassium permanganate solution, and a shaking component for shaking the prepared food sample solution is arranged above the detection rack 101, and a detection auxiliary mechanism 200 is arranged on the side of the support frame 124 away from the processing box 102. The detection auxiliary mechanism 200 includes a detection solution adding component arranged above the support frame 124 for adding potassium permanganate solution to the intermittent titration component, and an auxiliary supplementing component arranged above the support frame 124 for supplementing potassium permanganate solution to the detection solution adding component.

[0036] In this embodiment, the chopped solid pre-prepared food is put into the grinding cylinder 103, and then the pre-treatment component grinds and crushes the solid pre-prepared food and discharges it into the processing box 102, and the pre-treatment component in the processing box 102 dissolves, filters and adjusts the pH value of the crushed solid pre-prepared food, thereby quickly pre-treating the pre-prepared food sample. At the same time, the pre-treatment component with an integrated design can reduce other interferences to the pre-prepared food sample during the treatment process, thereby improving the detection efficiency of the pre-prepared food. When the pre-treatment is completed, the sample solution is discharged, and the intermittent titration component is controlled to perform mechanized intermittent titration on the potassium permanganate solution, thereby avoiding the situation that the titration operation is unstable and the titration cannot be uniformly titrated due to manual titration, and thus The accuracy of the test result is guaranteed. At the same time, when the intermittent titration component is working, the shaking component will be linked to move together, thereby driving the sample solution to shake together, thereby promoting the reactants in the sample solution to be fully mixed and contacted with the potassium permanganate solution, thereby increasing the reaction rate, thereby improving the accuracy and sensitivity of the test. After the potassium permanganate solution is titrated, the detection solution adding component is controlled to quickly add the potassium permanganate solution to the burette, avoiding the trouble of disassembling the burette, and ensuring the quantitative addition of the potassium permanganate solution, avoiding the occurrence of addition errors, and after the potassium permanganate solution is added, the auxiliary supplement component will be linked to supplement the potassium permanganate solution to the detection solution adding component.

[0037] Specifically, the pretreatment component includes a grinding chamber 104 disposed inside the grinding cylinder 103, and the cross-section of the grinding chamber 104 is funnel-shaped, a grinding head 105 is disposed above the grinding chamber 104, a rotating motor 107 is disposed above the grinding head 105, a transmission rod 108 is installed at the output end of the rotating motor 107, and the transmission rod 108 is connected to the grinding head 105 through a penetration, a filter screen 110 is provided in the inner cavity of the processing box 102, and the lower end of the transmission rod 108 penetrates the filter screen 110 and is detachably installed with a plurality of stirring blades 112, and the upper end of the processing box 102 is connected to the filter screen 110. There is a liquid inlet pipe 111, the lower end of the processing box 102 is connected to the discharge channel 113, and a storage box 114 is arranged below the discharge channel 113. The upper part of the grinding head 105 is arc-shaped, and the gap between the edge of the grinding head 105 and the inner wall of the grinding chamber 104 gradually decreases from top to bottom. A bracket 106 is welded to the side of the grinding cylinder 103 close to the support frame 124, and the upper end of the rotating motor 107 is detachably connected to the bracket 106. The discharge end of the grinding cylinder 103 is connected to the conveying channel 109, and the other end of the conveying channel 109 is connected to the feed end of the processing box 102.

[0038] In this embodiment, the grinding head 105 is fixedly connected to the transmission rod 108 by welding, and the filter screen 110 is fixedly connected to the inner cavity of the processing box 102 by bolting. During the inspection, the chopped solid pre-prepared vegetables are first put into the grinding cylinder 103, and then the rotating motor 107 is turned on. The rotating motor 107 drives the transmission rod 108 to rotate, and the transmission rod 108 drives the grinding head 105 to cooperate with the grinding chamber 104 to grind and crush the chopped solid pre-prepared vegetables, and then the ground and crushed solid pre-prepared vegetables are discharged into the processing box 102 through the conveying channel 109, and the dissolved solution and the acidic solution are discharged through the liquid inlet pipe 111, and the large particles of debris are intercepted by the filter screen 110. At the same time, during the rotation of the transmission rod 108, the stirring blade 112 on the transmission rod 108 will follow the rotation. The filter paper placed at the mouth of the discharge channel 113 is used to filter the sample solution again, thereby reducing the interference of impurities on subsequent titration. Finally, the sample solution that has been filtered twice is discharged into the storage box 114 through the discharge channel 113. The integrated design between the grinding cylinder 103 and the processing box 102 reduces the interference of other factors on the pre-prepared food samples during the processing, thereby improving the detection efficiency of the pre-prepared food. At the same time, the grinding head 105 and the stirring blade 112 on the transmission rod 108 work simultaneously, thereby improving the pretreatment efficiency of solid pre-prepared food. The arc design above the grinding head 105 avoids the accumulation of solid pre-prepared food above the grinding head 105 during the process of adding chopped solid pre-prepared food.

[0039] Furthermore, the intermittent titration assembly includes a servo motor 115 arranged on the detection frame 101, a screw rod 116 is installed at the output end of the servo motor 115, a fixing frame 117 is slidably installed on the side of the detection frame 101 away from the processing box 102, a connecting rod 118 is arranged on the side of the fixing frame 117 close to the processing box 102, a straight rod 119 is arranged on the side of the fixing frame 117 away from the connecting rod 118, a connecting frame 121 is arranged on the upper end of the connecting rod 118, a rack 122 is arranged on the side of the connecting frame 121 close to the processing box 102, a burette body 127 is arranged inside the support frame 124, a first stopcock 128 is arranged below the burette body 127, a gear 129 is arranged on the side of the first stopcock 128 away from the processing box 102, and the gear 129 is fixedly connected to the handle of the first stopcock 128 A screw sleeve 120 is fixedly installed in the middle of the fixed frame 117, the size of the screw 116 is adapted to the size of the screw sleeve 120, and the screw 116 is threadedly connected to the screw sleeve 120, an electromagnet 123 is fixedly installed on the upper end of the connecting rod 118, and the other end of the electromagnet 123 is fitted with the lower end of the connecting frame 121, a rack 122 is arranged on the rear side of the gear 129, and the rack 122 is meshed with the gear 129, and rubber pressing plates 130 are arranged on the front and rear sides of the burette body 127, and a screw is rotatably installed on the outer side of the rubber pressing plate 130 through a bearing, and the screw is spirally connected to the support frame 124, and a first slide groove 126 is opened on the rear side of the connecting frame 121, and a first slider 125 is fixedly installed on one side of the support frame 124 close to the first slide groove 126, and the first slider 125 is slidably connected to the first slide groove 126.

[0040] In this embodiment, the connecting rod 118 and the straight rod 119 are fixedly connected to the fixed frame 117 by welding, and the rack 122 is fixedly connected to the connecting frame 121 by welding. During titration, the servo motor 115 is turned on, and the servo motor 115 drives the screw rod 116 to rotate forward and backward periodically. The screw rod 116 cooperates with the screw rod sleeve 120 to drive the fixed frame 117 to move up and down, and the fixed frame 117 drives the connecting rod 118 to follow the movement. At the same time, the electromagnet 123 is turned on, and the electromagnet 123 is adsorbed on the connecting frame 121, and then in the process of the connecting rod 118 moving up and down, it will drive the connecting frame 121 to follow the movement, and then the rack 122 on the connecting frame 121 drives the gear 129 to rotate, and then the gear 129 drives the first stopcock 128 to rotate, so as to achieve mechanical control of the burette. The main body 127 performs the opening and closing operation of the titration, thereby avoiding the situation that the titration operation is unstable and the titration cannot be uniformly titrated during manual titration. At the same time, due to the cooperation of the gear 129 and the rack 122, the rotation angle of the first stopcock 128 is guaranteed to be constant, so as to control the outflow rate and titration amount of the potassium permanganate solution to be constant, thereby achieving the effect of uniform titration, thereby ensuring the accuracy of the test result. Through the design of the rubber pressure plates 130 on both sides of the burette main body 127, the screw can be rotated to drive the rubber pressure plate 130 to press and limit the burette main body 127 placed in the support frame 124, thereby ensuring the stability of the burette main body 127 during the titration process, and the first slider 125 cooperates with the first slide groove 126 to ensure the stability of the up and down movement of the connecting frame 121.

[0041] Among them, the shaking assembly includes a pushing frame 132 arranged on the storage box 114, a second slider 133 is arranged at the lower end of the pushing frame 132, a second slide groove 131 is opened at the upper end of the detection frame 101, the second slider 133 is slidably connected with the second slide groove 131, a return spring 134 is fixedly installed in the inner cavity of the second slide groove 131, the other end of the return spring 134 is fixedly connected with the second slider 133, a cam rod 135 is fixedly installed at the lower end of the screw rod 116, and the cam rod 135 is arranged on one side of the pushing frame 132.

[0042] In this embodiment, during the rotation of the screw rod 116, the cam rod 135 on the screw rod 116 will rotate accordingly, so that the cam rod 135 pushes the pushing frame 132, so that the pushing frame 132 moves to the left along the direction of the second slide groove 131, and at the same time compresses the reset spring 134. Then, relying on the spring resilience, the reset spring 134 drives the second slider 133 to reset, so that the pushing frame 132 reciprocates left and right, and then drives the sample solution in the storage box 114 to shake slightly left and right, thereby promoting the reactants in the sample solution to be fully mixed and contacted with the potassium permanganate solution, thereby increasing the reaction rate, thereby improving the accuracy and sensitivity of the detection, and the second slider 133 cooperates with the second slide groove 131 to ensure the stability of the left and right movement of the storage box 114, and ensure that the storage box 114 only moves along the direction of the second slide groove 131.

[0043] When in use and during testing, the chopped solid pre-prepared vegetables are first put into the grinding cylinder 103, and then the rotating motor 107 is turned on. The rotating motor 107 drives the transmission rod 108 to rotate, and the transmission rod 108 drives the grinding head 105 to cooperate with the grinding chamber 104 to grind and crush the chopped solid pre-prepared vegetables, and then the ground solid pre-prepared vegetables are discharged into the processing box 102 through the conveying channel 109, and at the same time, the dissolving solution and the acidic solution are discharged through the liquid inlet pipe 111, and then the filter screen 110 is used to intercept large particles of debris. At the same time, during the rotation of the transmission rod 108, the stirring blade 112 on the transmission rod 108 will rotate accordingly, thereby ensuring that the sample solution is fully dissolved, and then the filter paper placed along the mouth of the discharge channel 113 is used to filter the sample solution again. Filtration, thereby reducing the interference of impurities on subsequent titration, and finally the sample solution that has been filtered twice is discharged into the storage box 114 through the discharge channel 113. The integrated design between the grinding cylinder 103 and the processing box 102 reduces the interference of other factors on the pre-prepared food samples during the processing, thereby improving the detection efficiency of the pre-prepared food. At the same time, the grinding head 105 and the stirring blade 112 on the transmission rod 108 work simultaneously, thereby improving the pretreatment efficiency of the solid pre-prepared food. During titration, the servo motor 115 is turned on, and the servo motor 115 drives the screw rod 116 to rotate forward and backward periodically. The screw rod 116 cooperates with the screw rod sleeve 120 to drive the fixed frame 117 to move up and down, and the fixed frame 117 drives the connecting rod 118 to follow the movement, and at the same time, The electromagnet 123 is turned on, and the electromagnet 123 is adsorbed on the connecting frame 121, and then during the reciprocating movement of the connecting rod 118, the connecting frame 121 is driven to follow the movement, and then the rack 122 on the connecting frame 121 drives the gear 129 to rotate, and then the gear 129 drives the first stopcock 128 to rotate, so as to achieve the mechanical control of the opening and closing operation of the burette body 127 for titration, thereby avoiding the situation that the titration operation is unstable and the titration cannot be uniformly titrated in manual titration. At the same time, due to the cooperation of the gear 129 and the rack 122, the rotation angle of the first stopcock 128 is guaranteed to be constant, so as to achieve the control of the outflow speed and titration amount of the potassium permanganate solution to be constant, thereby achieving the effect of uniform titration, thereby ensuring the accuracy of the test result. At the same time, during the rotation of the screw rod 116, the cam rod 135 on the screw rod 116 will rotate accordingly, so that the cam rod 135 pushes the push frame 132, so that the push frame 132 moves to the left along the direction of the second slide groove 131, and at the same time compresses the reset spring 134. Then, relying on the spring resilience, the reset spring 134 drives the second slider 133 to reset, so that the push frame 132 reciprocates left and right, thereby driving the sample solution in the storage box 114 to shake slightly left and right, thereby promoting the reactants in the sample solution to fully mix and contact with the potassium permanganate solution, thereby increasing the reaction rate, thereby improving the accuracy and sensitivity of the detection, and then observing that the color of the solution in the storage box 114 changes significantly and does not fade within 30 seconds, that is, the titration end point,Then, based on the volume of potassium permanganate standard solution consumed during the titration process and the concentration of potassium permanganate, the content of reducing preservatives in the prepared dishes can be calculated.

[0044] Example 2, reference Figures 1 to 10 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a sampling and testing device for pre-prepared food products, which solves the problem that whenever the potassium permanganate solution in the burette is exhausted, the testing personnel often need to stop the work in their hands, take out the burette, and re-add new potassium permanganate solution. This process is not only cumbersome, but also easily introduces errors, resulting in inaccurate amount of potassium permanganate added, and thus the problem of being unable to ensure quantitative addition of potassium permanganate solution. The testing solution adding component includes a cylinder 201 arranged above the testing frame 101, and a lower pressing frame 202 is arranged on the side of the cylinder 201 away from the burette body 127, and the lower part of the lower pressing frame 202 A locating pin 204 is provided through the end, and a limiting groove 203 is provided on one side of the straight rod 119 close to the locating pin 204. The size of the locating pin 204 is matched with the size of the limiting groove 203, and the locating pin 204 is movably connected with the limiting groove 203. A piston head 205 is detachably installed on the upper end of the lower pressure frame 202. The size of the piston head 205 is matched with the inner cavity size of the cylinder 201. The piston head 205 is arranged above the cylinder 201. The infusion end of the cylinder 201 is connected with a first delivery tube 206, and a second stopcock 207 is arranged in the middle of the first delivery tube 206. The end of the first delivery tube 206 is connected with the upper end of the burette body 127.

[0045] In this embodiment, when adding, first control the movement of the fixing frame 117 to make the first cock 128 in the closed state, at this time the straight rod 119 on the fixing rod is flush with the lower end of the lower pressing frame 202, then close the electromagnet 123, push the positioning pin 204 to move to the left, so that the positioning pin 204 is inserted into the limiting groove 203, and then the lower end of the lower pressing frame 202 is connected to the straight rod 119, and then turn on the servo motor 115, the servo motor 115 drives the screw rod 116 to reverse, the screw rod 116 cooperates with the screw rod sleeve 120 to drive the fixing frame 117 to move downward, and at the same time open the second cock 207, close the third cock 210, at this time, the fixing frame 117 will drive the straight rod 119 to follow the movement during the downward movement, and then drive the lower pressing frame 202 to move downward, so that the piston head 205 on the lower pressing frame 202 moves downward, so that the cylinder The volume in the cylinder 201 decreases and the air pressure increases, thereby pushing the potassium permanganate solution in the cylinder 201 out and then discharging it into the burette body 127 through the first delivery pipe 206, thereby achieving the addition of the potassium permanganate solution in the burette body 127, eliminating the trouble of the staff to disassemble the burette body 127 to add the potassium permanganate solution, and the displacement distance of the piston head 205 is constant, thereby ensuring that the amount of potassium permanganate added to the burette body 127 is constant, thereby avoiding the error of manual disassembly and addition by the staff, thereby improving the detection efficiency and accuracy of solid pre-prepared dishes, and the positioning pin 204 cooperates with the limiting groove 203, so that they can be connected when adding, and can be separated when titrating, thereby avoiding the mutual interference.

[0046] Specifically, the auxiliary supplementary component includes a box body 208 arranged above the cylinder body 201, the lower end of the box body 208 is connected to a second delivery pipe 209, the end of the second delivery pipe 209 is connected to the liquid inlet end of the cylinder body 201, a third stopcock 210 is arranged in the middle of the second delivery pipe 209, and a liquid inlet 211 is arranged at the upper end of the box body 208.

[0047] In this embodiment, the cylinder 201, the first delivery pipe 206, the box 208 and the second delivery pipe 209 are all made of quartz glass. After the lower pressure frame 202 is moved down, the second stopcock 207 is closed, and the third stopcock 210 is opened at the same time, and then the fixed frame 117 is controlled to move upward and reset. During the upward movement of the lower pressure frame 202, the lower pressure frame 202 will drive the piston head 205 to move upward, thereby forming a negative pressure to draw the potassium permanganate solution in the box 208 into the cylinder 201, thereby replenishing the potassium permanganate solution in the cylinder 201, which is convenient for the next time to carry out the potassium permanganate solution in the burette body 127. The addition of potassium permanganate solution is ensured, and the connecting rod 118 on the fixing frame 117 does not move after contacting the electromagnet 123, thereby ensuring that the potassium permanganate solution pumped into the cylinder 201 is also constant, further reducing the error caused by the addition of potassium permanganate solution. Since the cylinder 201, the first delivery pipe 206, the box 208 and the second delivery pipe 209 are made of quartz glass, the corrosion of potassium permanganate is effectively resisted, and the storage, delivery and addition of potassium permanganate solution are ensured. Since the piston head 205 is arranged above the cylinder 201, it will not contact the potassium permanganate solution during the process of pressing down or moving up.

[0048] The rest of the structure is the same as that of Example 1.

[0049] When adding, first control the fixed frame 117 to move, so that the first cock 128 is in the closed state, at this time the straight rod 119 on the fixed rod is flush with the lower end of the lower pressure frame 202, then close the electromagnet 123, push the positioning pin 204 to move to the left, so that the positioning pin 204 is inserted into the limit groove 203, and then the lower end of the lower pressure frame 202 is connected to the straight rod 119, and then turn on the servo motor 115, the servo motor 115 drives the screw rod 116 to reverse, and the screw rod 116 cooperates with the screw rod sleeve 120 to drive the fixed frame 117 to move downward At the same time, the second stopcock 207 is opened and the third stopcock 210 is closed. At this time, the fixing frame 117 moves downward, which drives the straight rod 119 to move with it, and then drives the lower pressing frame 202 to move downward, so that the piston head 205 on the lower pressing frame 202 moves downward, the volume in the cylinder 201 is reduced, and the air pressure is increased, so that the potassium permanganate solution in the cylinder 201 is pushed out, and then discharged into the burette body 127 through the first delivery pipe 206, so as to achieve the addition of the potassium permanganate solution in the burette body 127, eliminating the need for staff The trouble of disassembling the burette body 127 to add potassium permanganate solution is eliminated, and the displacement distance of the piston head 205 is constant, thereby ensuring that the amount of potassium permanganate added to the burette body 127 is constant, thereby avoiding the error of manual disassembly and addition by the staff, thereby improving the detection efficiency and accuracy of solid pre-prepared dishes. After the lower pressing frame 202 is moved downward, the second stopcock 207 is closed, and the third stopcock 210 is opened at the same time, and then the fixing frame 117 is controlled to move upward to reset. After the lower pressing frame 202 moves upward, the second stopcock 207 is closed, and the third stopcock 210 is opened. Then, the fixing frame 117 is controlled to move upward to reset. During the process, the lower pressing frame 202 will drive the piston head 205 to move upward, thereby forming a negative pressure to draw the potassium permanganate solution in the box 208 into the cylinder 201, thereby replenishing the potassium permanganate solution in the cylinder 201, making it convenient to add the potassium permanganate solution to the burette body 127 next time, and the connecting rod 118 on the fixing frame 117 will no longer move after contacting the electromagnet 123, thereby ensuring that the potassium permanganate solution drawn into the cylinder 201 is also constant, further reducing the error caused by the addition of the potassium permanganate solution.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A sampling and testing device for pre-prepared food products, characterized in that: include, A sampling and testing mechanism (100), comprising a testing frame (101), and a processing box (102) arranged above the testing frame (101), a grinding cylinder (103) being arranged above the processing box (102), and also comprising a pre-treatment component arranged in the processing box (102) and the grinding cylinder (103) for pre-treating the prepared food before testing, and a support frame (124) arranged on the right side of the processing box (102), an intermittent titration component for assisting the titration of a potassium permanganate solution being arranged inside the support frame (124), a shaking component for shaking the prepared food sample solution being arranged above the testing frame (101), and a detection auxiliary mechanism (200) being arranged on a side of the support frame (124) away from the processing box (102); The detection auxiliary mechanism (200) comprises a detection solution adding component arranged above the support frame (124) for adding potassium permanganate solution to the intermittent titration component, and an auxiliary supplementing component arranged above the support frame (124) for supplementing the detection solution adding component with potassium permanganate solution; The intermittent titration assembly comprises a servo motor (115) arranged on the detection frame (101), a screw rod (116) being installed at the output end of the servo motor (115), a fixing frame (117) being slidably installed on the upper side of the detection frame (101) away from the processing box (102), a connecting rod (118) being provided on the side of the fixing frame (117) close to the processing box (102), a burette body (127) being arranged inside the support frame (124), a first cock (128) being arranged below the burette body (127), a gear (129) being arranged on the side of the first cock (128) away from the processing box (102), and the gear (129) being fixedly connected to the handle of the first cock (128), and an electromagnet (123) being fixedly installed on the upper end of the connecting rod (118); The shaking assembly comprises a pushing frame (132) arranged on the storage box (114); a cam rod (135) is fixedly mounted on the lower end of the screw rod (116); and the cam rod (135) is arranged on one side of the pushing frame (132); The detection solution adding assembly comprises a cylinder (201) arranged above the detection frame (101), a lower pressing frame (202) is arranged on a side of the cylinder (201) away from the burette body (127), a positioning pin (204) is provided through the lower end of the lower pressing frame (202), and a piston head (205) is detachably mounted on the upper end of the lower pressing frame (202).

2. The pre-prepared food product sampling and detection device according to claim 1, characterized in that: The pretreatment component comprises a grinding chamber (104) arranged inside a grinding cylinder (103), and the cross section of the grinding chamber (104) is funnel-shaped; a grinding head (105) is arranged above the grinding chamber (104); a rotating motor (107) is arranged above the grinding head (105); a transmission rod (108) is installed at the output end of the rotating motor (107); the transmission rod (108) is connected to the grinding head (105); a filter screen (110) is arranged in the inner cavity of the treatment box (102); a plurality of stirring blades (112) are detachably installed on the lower end of the transmission rod (108) through the filter screen (110); the upper end of the treatment box (102) is connected to a liquid inlet pipe (111); the lower end of the treatment box (102) is connected to a discharge channel (113); and a storage box (114) is arranged below the discharge channel (113).

3. The sampling and testing device for pre-prepared food products according to claim 2, characterized in that: The upper part of the grinding head (105) is arc-shaped, and the gap between the edge of the grinding head (105) and the inner wall of the grinding chamber (104) gradually decreases from top to bottom. A bracket (106) is welded to the side of the grinding cylinder (103) close to the support frame (124), and the upper end of the rotating motor (107) is detachably connected to the bracket (106). The discharge end of the grinding cylinder (103) is connected to a conveying channel (109), and the other end of the conveying channel (109) is connected to the feed end of the processing box (102).

4. The sampling and testing device for pre-prepared food products according to claim 3, characterized in that: A straight rod (119) is provided on a side of the fixed frame (117) away from the connecting rod (118); a connecting frame (121) is provided on the upper end of the connecting rod (118); the connecting rod (118) and the straight rod (119) are both fixedly connected to the fixed frame (117) by welding; a rack (122) is provided on a side of the connecting frame (121) close to the processing box (102); the rack (122) is fixedly connected to the connecting frame (121) by welding.

5. The sampling and testing device for pre-prepared food products according to claim 4, characterized in that: A screw sleeve (120) is fixedly mounted in the middle of the fixing frame (117); the size of the screw (116) matches the size of the screw sleeve (120); the screw (116) and the screw sleeve (120) are threadedly connected; the upper end of the electromagnet (123) fits the lower end of the connecting frame (121); the rack (122) is arranged on the rear side of the gear (129); the rack (122) and the gear (129) are meshed; the burette body (127) ) are provided with rubber pressure plates (130) on both the front and rear sides, and a screw is rotatably installed on the outer side of the rubber pressure plate (130) through a bearing, and the screw is spirally connected to the support frame (124), and a first slide groove (126) is provided on the side of the connecting frame (121) away from the gear (129), and a first sliding block (125) is fixedly installed on the side of the support frame (124) close to the first sliding groove (126), and the first sliding block (125) is slidably connected to the first sliding groove (126).

6. The sampling and testing device for pre-prepared food products according to claim 5, characterized in that: A second slider (133) is disposed at the lower end of the pushing frame (132), a second slide groove (131) is provided at the upper end of the detection frame (101), the second slider (133) is slidably connected to the second slide groove (131), a return spring (134) is fixedly installed in the inner cavity of the second slide groove (131), and the other end of the return spring (134) is fixedly connected to the second slider (133).

7. The sampling and testing device for pre-prepared food products according to claim 6, characterized in that: A limiting groove (203) is provided on one side of the straight rod (119) close to the positioning pin (204); the size of the positioning pin (204) matches the size of the limiting groove (203); the positioning pin (204) and the limiting groove (203) are movably connected; the size of the piston head (205) matches the size of the inner cavity of the cylinder (201); the piston head (205) is arranged above the cylinder (201); the infusion end of the cylinder (201) is connected to a first delivery tube (206); a second stopcock (207) is arranged in the middle of the first delivery tube (206); and the end of the first delivery tube (206) is connected to the upper end of the burette body (127).

8. The device for sampling and detecting pre-prepared food products according to claim 7, characterized in that: The auxiliary replenishing component comprises a box body (208) arranged above the cylinder body (201); the lower end of the box body (208) is connected to a second delivery pipe (209); the end of the second delivery pipe (209) is connected to a liquid inlet end of the cylinder body (201); a third stopcock (210) is arranged in the middle of the second delivery pipe (209); and the upper end of the box body (208) is provided with a liquid inlet (211).

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