Nitrite detection device and method for pickled vegetables

Abstract

The invention belongs to the technical field of nitrite detection, and particularly relates to a nitrite detection device for pickled vegetables and a method thereof.The nitrite detection device for the pickled vegetables comprises a processing barrel, and a cutting and extruding assembly for cutting the pickled vegetables is arranged at the top of the processing barrel; a bottom supporting assembly used for supporting and draining is arranged at the bottom of the treatment barrel, an external turning assembly used for vibrating and striking the bottom supporting assembly is arranged on one side of the treatment barrel, and the treatment barrel is rotationally sleeved with a gear ring; a lifting driving assembly used for driving the cutting and extruding assembly and the external turning assembly to move up and down is arranged on the gear ring, a rotating driving assembly used for driving the gear ring to rotate is arranged on the processing barrel, and the problems that when pickled vegetables are crushed, the juice discharging effect is poor, and the detection result is affected are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of nitrite detection, and particularly relates to a nitrite detection device and method for pickled vegetables. Background Art

[0002] In the field of food processing, pickled vegetables are deeply loved by consumers because of their unique flavor. However, the generation of nitrite during the pickling process has become an important hidden danger to food safety. Nitrite can inhibit the growth of Clostridium botulinum and other types of spoilage bacteria, has good color-forming and antioxidant effects, and can improve the flavor of pickled foods. However, nitrite can react with amine compounds, the decomposition products of proteins in pickled products, to form nitrosamines, and nitrosamines are a strong carcinogen. Therefore, it is crucial to accurately detect the nitrite content in pickled vegetables. When detecting nitrite in pickled vegetables, generally, after cutting and crushing the pickled vegetables with a cutting device, they are put into water to dissolve the nitrite into the water, and then the nitrite content in the water per unit volume is detected. However, there are the following defects: After processing the pickled vegetables by cutting and crushing, there is still a large amount of juice in the pickled vegetables, and the juice discharge effect of the pickled vegetables in the nitrite treatment solution is not good, resulting in errors in the nitrite detection results. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a nitrite detection device and method for pickled vegetables, effectively solving the problem that the juice discharge effect is not good when crushing pickled vegetables, affecting the detection results.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: A nitrite detection device for pickled vegetables includes a treatment cylinder. A cutting and squeezing assembly for cutting pickled vegetables is provided at the top of the treatment cylinder. A bottom support assembly for supporting and draining water is provided at the bottom of the treatment cylinder. An external turning assembly for vibrating and hitting the bottom support assembly is provided on one side of the treatment cylinder. A toothed ring is rotatably sleeved on the treatment cylinder. A lifting drive assembly for driving the cutting and squeezing assembly and the external turning assembly to move up and down is provided on the toothed ring. A rotation drive assembly for driving the toothed ring to rotate is provided on the treatment cylinder.

[0005] The following is a further optimization of the above technical solutions of the present invention: The cutting and squeezing assembly includes a baffle plate sleeved inside the treatment cylinder. A plurality of cutting blades are installed at the bottom end of the baffle plate. A pressing plate for squeezing pickled vegetables is provided below the baffle plate. A plurality of knife grooves are formed on the pressing plate. The cutting blades are slidably connected to their corresponding knife grooves. Two suspension rods are symmetrically installed at the top end of the pressing plate. The top ends of the suspension rods penetrate above the baffle plate and are fixedly connected to a top plate.

[0006] Further optimization: A middle connecting member for exhaust is provided above the pressing plate, and a clamping and positioning member that is clamped with the middle connecting member is provided on the baffle plate.

[0007] Further optimization: The middle connecting member includes an installation box fixedly installed at the top end of the pressing plate. Side holes are symmetrically opened on both side ends of the installation box. A top pipe is fixedly connected to the top end of the installation box, and the top end of the top pipe is fixedly connected to the top plate. A bottom groove is opened at the bottom end of the installation box. A rotating block is rotatably installed inside the installation box. A through hole is opened inside the rotating block. A magnetic block is installed at a position on one side of the rotating block away from its center. An electromagnet corresponding to the magnetic block is installed on one side of the installation box.

[0008] Further optimization: The clamping and positioning member includes a middle groove opened on the baffle plate. The installation box is located inside the middle groove. Activity grooves are symmetrically opened on both sides of the middle groove. An activity plate is slidably connected inside the activity groove. The top end of the activity plate extends to the outside of the baffle plate. Clamping rods are fixedly connected to both sides of the two activity plates close to each other. The end of the clamping rod passes through the corresponding side hole and is inserted into the through hole. A first spring is fixedly connected to the side of the activity plate away from the clamping rod, and the other end of the first spring is fixedly connected to the inner wall of the corresponding activity groove.

[0009] Further optimization: The bottom support assembly includes a fixed ring fixedly installed at the bottom end of the processing cylinder. A support plate is provided above the fixed ring. The outer wall of the support plate is in close fit with the inner wall of the processing cylinder. A bottom ring is provided below the fixed ring. A plurality of guide rods are fixedly connected at equal angles between the support plate and the bottom ring. A plurality of guide grooves are opened at equal angles on the fixed ring. The guide rods are slidably connected to the corresponding guide grooves. A second spring is sleeved on the guide rod, and both ends of the second spring are fixedly connected to the fixed ring and the bottom ring respectively. A bottom pipe is fixedly installed at the bottom end of the support plate, and a valve is installed on the bottom pipe.

[0010] Further optimization: The external turning assembly includes a vertical plate provided on one side of the processing cylinder. A chute is opened on the vertical plate. A slider is fixedly connected to one end of the top plate away from the lifting drive assembly. The slider is slidably connected to the chute. A bottom plate is fixedly installed at the bottom end of one side of the vertical plate. A moving pressing ball is installed on the top surface of the bottom plate. A plurality of fixed hemispheres are installed at equal angles at the bottom end of the bottom ring. The moving pressing ball is arranged corresponding to the fixed hemispheres.

[0011] Further optimization: A rotating cylinder is rotatably installed at the end of the slider away from the top plate. A communication cavity is opened inside the top plate. Both ends of the communication cavity are communicated with the inner cavity of the rotating cylinder and the top pipe respectively. A plurality of inclined fan blades are installed at equal angles on the inner wall of the rotating cylinder. A friction cylinder is fixedly installed at the end of the rotating cylinder away from the top plate. A friction plate is arranged on one side of the friction cylinder. The friction plate is fixedly installed on the vertical plate. The friction cylinder is in close contact with the friction plate.

[0012] Further optimization: The rotation drive assembly includes a gear, which is meshed and connected with a toothed ring. A motor is fixedly installed on the side wall of the processing cylinder, and the gear is fixedly connected to the output shaft of the motor. The lifting drive assembly includes an electric push rod, which is fixedly installed on the toothed ring, and the push rod of the electric push rod is fixedly connected to the top plate.

[0013] Further optimization: The present invention also discloses a method for detecting nitrite in pickled vegetables. Based on the above-mentioned device for detecting nitrite in pickled vegetables, the detection method includes the following steps: S1. Feeding: Drive the baffle and the pressing plate to move upward to open the processing cylinder, and put a quantitative amount of pickled vegetables into the interior of the processing cylinder. S2. Cutting and crushing: Drive the pressing plate to reciprocate longitudinally through the electric push rod, so that the cutting blade reciprocates longitudinally for cutting and crushing. At the same time, the cutting blade changes the cutting angle as the toothed ring rotates. S3. Extrusion: After separating the baffle from the pressing plate, drive the pressing plate to move downward to extrude the pickled vegetables that have been cut and crushed, and squeeze out the juice in the pickled vegetables. S4. Detection: Open the processing cylinder, inject a quantitative amount of clear water into the interior of the processing cylinder, so that the nitrite on the surface of the pickled vegetables and in the juice is dissolved in the water and the water is discharged, and detect the nitrite content per unit volume in the water.

[0014] Beneficial effects: <U+ Through the rational design of the cutting and extrusion assembly, the pressing plate reciprocates longitudinally, so that the cutting blade reciprocally cuts the pickled vegetables, which is convenient for the juice inside the pickled vegetables to be discharged. At the same time, the pressing plate rotates continuously with the toothed ring, so that the cutting angle of the cutting blade changes continuously, improving the juice discharge effect, increasing the nitrite discharge amount inside the pickled vegetables, and improving the detection accuracy. When the baffle and the pressing plate are separated, the pressing plate moves downward alone to extrude the pickled vegetables, improving the juice discharge effect of the pickled vegetables. While the pressing plate moves downward, the rotating cylinder rotates, and under the action of the fan blades, a negative pressure is generated inside the rotating cylinder, so that the gas in the processing cylinder is quickly discharged. When the rotating block is in the horizontal state of the through hole, the clamping rod is inserted into the through hole to clamp and fix the baffle and the pressing plate, which is convenient for cutting operations. When the rotating block is in the vertical state of the through hole, the baffle and the pressing plate are separated, which is convenient for the pressing plate to extrude the pickled vegetables and makes the inner cavity of the processing cylinder communicate with the top pipe, facilitating the rapid discharge of the gas in the processing cylinder and reducing the resistance when the pressing plate presses down. After the set top plate moves upward to contact the top wall of the chute, the top plate continues to move upward so that the moving pressing ball contacts the bottom surface of the bottom ring, and the vertical plate rotates with the toothed ring through the top plate, causing the moving pressing ball to continuously pass over the fixed hemispheres on the bottom surface of the bottom ring, generating vibration on the support plate, facilitating the turning of pickled vegetables, adjusting the turning of the cutting position of pickled vegetables, improving the juice drainage effect, increasing the discharge amount of nitrite inside pickled vegetables, and further improving the detection accuracy.

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present invention; Figure 2 It is a schematic diagram of the internal structure of the processing cylinder in the embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the bottom support assembly in the embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of the cutting and pressing assembly in the embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the baffle and the pressing plate in the embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the clamping and positioning member at the baffle position in the embodiment of the present invention; Figure 7 It is a schematic diagram of the structure of the pressing plate in the embodiment of the present invention; Figure 8 It is a schematic diagram of the structure of the middle connecting member in the embodiment of the present invention; Figure 9 It is a schematic diagram of the structure of the external turning assembly in the embodiment of the present invention; Figure 10 It is a schematic diagram of the structure at the position of the rotating cylinder in the embodiment of the present invention.

[0017] In the figure: 1 - processing cylinder; 2 - cutting and extrusion assembly; 201 - baffle; 202 - cutting blade; 203 - pressing plate; 204 - suspension rod; 205 - top plate; 206 - cutter groove; 207 - clamping and positioning part; 2071 - middle groove; 2072 - movable groove; 2073 - movable plate; 2074 - clamping rod; 2075 - first spring; 208 - middle connecting part; 2081 - installation box; 2082 - side hole; 2083 - top pipe; 2084 - electromagnet; 2085 - bottom groove; 2086 - rotating block; 2087 - through hole; 2088 - magnetic block; 3 - gear ring; 4 - gear; 5 - motor; 6 - bracket; 7 - electric push rod; 8 - bottom support assembly; 801 - fixing ring; 802 - guiding groove; 803 - support plate; 804 - guiding rod; 805 - bottom ring; 806 - second spring; 807 - fixed hemisphere; 808 - bottom pipe; 809 - valve; 9 - external turning assembly; 901 - limiting ring; 902 - vertical plate; 903 - limiting frame; 904 - sliding groove; 905 - slider; 906 - bottom plate; 907 - moving pressure ball; 908 - rotating cylinder; 909 - communicating cavity; 910 - air hole; 911 - fan blade; 912 - friction cylinder; 913 - friction plate. Detailed implementation mode

[0018] As Figures 1-10 Shown in the figure, a nitrite detection device for pickled vegetables includes a processing cylinder 1. A cutting and extrusion assembly 2 for cutting pickled vegetables is arranged at the top of the processing cylinder 1. A bottom support assembly 8 for supporting and draining water is arranged at the bottom of the processing cylinder 1. An external turning assembly 9 for vibrating and hitting the bottom support assembly 8 is arranged on one side of the processing cylinder 1. A gear ring 3 is rotatably sleeved on the processing cylinder 1. A lifting drive assembly for driving the cutting and extrusion assembly 2 and the external turning assembly 9 to move up and down is arranged on the gear ring 3. A rotation drive assembly for driving the gear ring 3 to rotate is arranged on the processing cylinder 1.

[0019] The rotation drive assembly includes a gear 4. The gear 4 is meshed and connected with the gear ring 3. A motor 5 is fixedly installed on the side wall of the processing cylinder 1 through a support frame. The gear 4 is fixedly connected with the output shaft of the motor 5, so as to facilitate the motor 5 to drive the gear ring 3 to rotate around the processing cylinder 1.

[0020] The lifting drive assembly includes an electric push rod 7. The electric push rod 7 is fixedly installed on the gear ring 3 through a bracket 6. The push rod of the electric push rod 7 is fixedly connected with the cutting and extrusion assembly 2.

[0021] The cutting and extrusion assembly 2 includes a baffle 201. The baffle 201 is sleeved inside the processing cylinder 1. A plurality of cutting blades 202 are equidistantly installed at the bottom end of the baffle 201. A pressing plate 203 for extruding pickled vegetables is arranged below the baffle 201. A plurality of knife grooves 206 are equidistantly formed on the pressing plate 203. The cutting blades 202 are slidably connected to their corresponding knife grooves 206.

[0022] Two suspension rods 204 are symmetrically installed at the top end of the pressing plate 203. The top ends of the suspension rods 204 penetrate above the baffle 201 and are fixedly connected to a top plate 205. The push rod of the electric push rod 7 is fixedly connected to the top plate 205.

[0023] A middle connecting member 208 for exhausting gas is arranged above the pressing plate 203. A clamping and positioning member 207 which is clamped with the middle connecting member 208 is arranged at a position on the baffle 201 corresponding to the middle connecting member 208.

[0024] With such a design, the baffle 201 and the pressing plate 203 can be combined together through the clamping and positioning member 207 and the middle connecting member 208. The electric push rod 7 drives the pressing plate 203 to move longitudinally back and forth, so that the cutting blades 202 cut the pickled vegetables, facilitating the discharge of the juice inside the pickled vegetables. At the same time, as the toothed ring 3 rotates continuously, the cutting angle of the cutting blades 202 changes continuously, facilitating the cutting of the pickled vegetables from multiple angles, improving the juice discharge effect, increasing the discharge amount of nitrite inside the pickled vegetables, and thus improving the detection accuracy.

[0025] The middle connecting member 208 includes an installation box 2081 fixedly installed at the top end of the pressing plate 203. A circular cavity is arranged inside the installation box 2081. Side holes 2082 are symmetrically formed at both side ends of the installation box 2081. A top pipe 2083 is fixedly connected to the top end of the installation box 2081. The top end of the top pipe 2083 is fixedly connected to the top plate 205. A bottom groove 2085 is formed at the bottom end of the installation box 2081. The side holes 2082, the top pipe 2083 and the bottom groove 2085 are all communicated with the circular cavity.

[0026] A rotating block 2086 is rotatably installed in the circular cavity. A through hole 2087 is formed inside the rotating block 2086. A magnetic block 2088 is installed at a position on one side of the rotating block 2086 far from its center. An electromagnet 2084 is installed on one side of the installation box 2081. The electromagnet 2084 is arranged corresponding to the magnetic block 2088.

[0027] With such a design, when the electromagnet 2084 is energized and attracted to the magnetic block 2088, the through hole 2087 is in a horizontal state.

[0028] The snap - in positioning member 207 includes a middle groove 2071 formed in the baffle 201. The mounting box 2081 is located inside the middle groove 2071. Activity grooves 2072 are symmetrically formed on both sides of the middle groove 2071. An activity plate 2073 is slidably connected inside the activity groove 2072. The top end of the activity plate 2073 extends to the outside of the baffle 201. Snap rods 2074 are fixedly connected to the mutually - approaching sides of the two activity plates 2073. The end of the snap rod 2074 passes through the corresponding side hole 2082 and is inserted into the through - hole 2087. A first spring 2075 is fixedly connected to the side of the activity plate 2073 away from the snap rod 2074, and the other end of the first spring 2075 is fixedly connected to the inner wall of the corresponding activity groove 2072.

[0029] With such a design, when the position of the rotating block 2086 is in the horizontal state of the through - hole 2087, the snap rod 2074 is snapped into the through - hole 2087, enabling the baffle 201 and the pressing plate 203 to be snap - connected and fixed, which is convenient for cutting; when the rotating block 2086 is in the vertical state of the through - hole 2087, the baffle 201 and the pressing plate 203 are separated, which is convenient for the pressing plate 203 to extrude the pickled vegetables and enables the inner cavity of the treatment cylinder 1 to communicate with the top pipe 2083, facilitating the discharge of the gas in the inner cavity of the treatment cylinder 1.

[0030] The bottom support assembly 8 includes a fixed ring 801 fixedly installed at the bottom end of the treatment cylinder 1. Above the fixed ring 801 is provided a support plate 803. The outer wall of the support plate 803 is in close fit with the inner wall of the treatment cylinder 1. Below the fixed ring 801 is provided a bottom ring 805. A plurality of guide rods 804 are fixedly connected at equal angles between the support plate 803 and the bottom ring 805. A plurality of guide grooves 802 are formed at equal angles on the fixed ring 801, and the guide rods 804 are slidably connected to the corresponding guide grooves 802.

[0031] A second spring 806 is sleeved on the guide rod 804, and the two ends of the second spring 806 are respectively fixedly connected to the fixed ring 801 and the bottom ring 805.

[0032] A bottom pipe 808 is fixedly installed at the bottom end of the support plate 803. The bottom pipe 808 communicates with the inner cavity of the treatment cylinder 1, and a valve 809 is installed on the bottom pipe 808.

[0033] The external turning assembly 9 includes a vertical plate 902 arranged on one side of the treatment cylinder 1. A sliding groove 904 is formed in the vertical plate 902. One end of the top plate 205 away from the electric push rod 7 is fixedly connected with a slider 905, and the slider 905 is slidably connected to the sliding groove 904. At the bottom end of one side of the vertical plate 902, a bottom plate 906 is fixedly installed. A moving pressure ball 907 is installed on the top surface of the bottom plate 906. A plurality of fixed hemispheres 807 are installed at equal angles at the bottom end of the bottom ring 805, and the moving pressure ball 907 is arranged corresponding to the fixed hemispheres 807.

[0034] With this design, after the top plate 205 moves upward to contact the top wall of the chute 904, the top plate 205 continues to move upward so that the moving pressing ball 907 contacts the bottom wall of the bottom ring 805. The vertical plate 902 rotates with the toothed ring 3, causing the moving pressing ball 907 to continuously pass over the fixed hemispheres 807 on the bottom wall of the bottom ring 805, generating vibrations on the support plate 803, facilitating the turning of the pickled vegetables above the support plate 803, adjusting the cutting position of the pickled vegetables, improving the juice drainage effect, increasing the discharge amount of nitrite inside the pickled vegetables, and thus improving the detection accuracy.

[0035] A limiting frame 903 is fixedly connected to the side of the vertical plate 902 close to the processing cylinder 1. A limiting ring 901 is fixedly connected to the outer wall of the processing cylinder 1. The limiting frame 903 is located above the limiting ring 901 to limit the longitudinal position of the external turning assembly 9.

[0036] One end of the slider 905 away from the top plate 205 is rotatably installed with a rotating cylinder 908. A communication cavity 909 is opened inside the top plate 205. Both ends of the communication cavity 909 are respectively communicated with the inner cavity of the rotating cylinder 908 and the top pipe 2083. A plurality of fan blades 911 inclinedly arranged are equiangularly installed on the inner wall of the rotating cylinder 908. A plurality of air holes 910 are equiangularly opened on the outer wall of the rotating cylinder 908. The air holes 910 are located on the side of the fan blades 911 away from the top plate 205.

[0037] A friction cylinder 912 is fixedly installed at one end of the rotating cylinder 908 away from the top plate 205. A friction plate 913 is arranged on one side of the friction cylinder 912. The friction plate 913 is fixedly installed on the vertical plate 902. The friction cylinder 912 is in close contact with the friction plate 913.

[0038] With this design, when the baffle 201 is separated from the pressing plate 203, the top plate 205 moves downward. During the downward movement of the driving friction cylinder 912, a frictional force is generated with the friction plate 913, causing the rotating cylinder 908 to rotate. Under the action of the fan blades 911, a negative pressure is generated inside the processing cylinder 1, accelerating the discharge of the gas inside the processing cylinder 1.

[0039] During operation, first start the electric push rod 7 to push the top plate 205 upward, and then pull the pressing plate 203 and the baffle 201 upward to open the processing cylinder 1, and put a fixed amount of pickled vegetables into the processing cylinder 1.

[0040] Subsequently, cut the pickled vegetables. During cutting, drive the top plate 205 to move downward through the electric push rod 7, and then drive the pressing plate 203 and the baffle 201 to move downward, so that the cutting blade 202 cuts the pickled vegetables, and drive the cutting blade 202 to move longitudinally back and forth through the electric push rod 7 to cut and crush the pickled vegetables reciprocally.

[0041] The starting motor 5 drives the gear ring 3 to rotate, causing the pressing plate 203 and the baffle 201 to rotate with the gear ring 3, thereby driving the cutting blade 202 to rotate horizontally, adjusting the cutting angle of the cutting blade 202, making the pickled vegetables broken more fully, and improving the cutting effect.

[0042] After the top plate 205 moves upward and contacts the top of the sliding groove 904, the top plate 205 continues to move upward, pushing the vertical plate 902 upward, so that the moving pressure ball 907 contacts the bottom surface of the bottom ring 805. At the same time, the vertical plate 902 rotates with the gear ring 3, driving the moving pressure ball 907 to rotate along the bottom surface of the bottom ring 805. The bottom surface of the bottom ring 805 is equiangularly installed with fixed hemispheres 807, so that when the moving pressure ball 907 passes through the fixed hemispheres 807, it generates vibration on the support plate 803, thereby turning the pickled vegetables above the support plate 803, further improving the cutting effect of the pickled vegetables and facilitating the full discharge of the juice.

[0043] After the cutting of the pickled vegetables is completed, pull the two movable plates 2073 to make the two clamping rods 2074 move away from each other and disengage from the through hole 2087. At this time, the rotating block 2086 rotates under the gravity of the magnetic block 2088, so that the rotating block 2086 rotates until the through hole 2087 is in a vertical state. At this time, the pressing plate 203 is disengaged from the baffle 201, and the electric push rod 7 drives the pressing plate 203 to move downward to squeeze the pickled vegetables, squeezing out the juice of the pickled vegetables, and facilitating the discharge of nitrite inside the pickled vegetables.

[0044] Since the through hole 2087 is in a vertical state, the top pipe 2083 is communicated with the inner cavity of the treatment cylinder 1. During the downward movement of the pressing plate 203, the vertical plate 902 will not move downward under the action of the limit frame 903 and the limit ring 901. At this time, the top plate 205 moves downward relative to the sliding groove 904, so that the friction cylinder 912 and the friction plate 913 generate friction force. During the downward movement, the rotating cylinder 908 rotates rapidly under the action of the friction force, thereby driving the air inside the treatment cylinder 1 to generate negative pressure through the rotation of the fan blade 911, and then quickly exhausting the air inside the treatment cylinder 1.

[0045] After the extrusion is completed, the pressing plate 203 moves upward and pushes the baffle 201 upward to open the treatment cylinder 1. Inject a certain amount of clear water into the treatment cylinder 1, and then the pressing plate 203 and the baffle 201 move downward to seal the top of the treatment cylinder 1. Start the motor 5 to drive the gear ring 3 to rotate, so that the cutting blade 202 rotates inside the treatment cylinder 1, so that the nitrite on the surface of the pickled vegetables and in its juice is dissolved into the clear water. Then open the valve 809 to drain the water, and then take a sample of the water for detection. Put a certain volume of water into the nitrite detector to detect the nitrite content per unit volume.

[0046] After the detection is completed, clean the internal equipment of the treatment cylinder 1, and recombine the baffle 201 and the pressing plate 203. When recombining, energize the electromagnet 2084 so that the electromagnet 2084 generates a suction force on the magnetic block 2088, causing the rotating block 2086 to rotate until the through hole 2087 returns to the horizontal state. At this time, the clamping rod 2074 is reinserted into the through hole 2087 to connect the baffle 201 and the pressing plate 203.

[0047] The present invention also discloses a method for detecting nitrite in pickled vegetables. Based on the above-mentioned nitrite detection device for pickled vegetables, the detection method includes the following steps: S1. Feeding: Drive the baffle 201 and the pressing plate 203 to move upward to open the treatment cylinder 1, and put a quantitative amount of pickled vegetables into the treatment cylinder 1. S2. Cutting and crushing: Drive the pressing plate 203 to reciprocate longitudinally through the electric push rod 7, so that the cutting blade 202 reciprocates longitudinally for cutting and crushing. At the same time, the cutting blade 202 changes the cutting angle as it rotates with the toothed ring 3. S3. Extrusion: After separating the baffle 201 and the pressing plate 203, drive the pressing plate 203 to move downward to extrude the cut and crushed pickled vegetables to squeeze out the juice in the pickled vegetables. S4. Detection: Open the treatment cylinder 1, inject a quantitative amount of clear water into the treatment cylinder 1, so that the nitrite on the surface of the pickled vegetables and in the juice dissolves in the water and the water is discharged, and detect the nitrite content per unit volume in the water.

[0048] For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions, and variations made to the embodiments still fall within the protection scope of the present invention.

Claims

1. A nitrite detection device for pickled vegetables, comprising a processing cylinder (1), characterized in that: At the top of the processing cylinder (1), there is a cutting and squeezing assembly (2) for cutting pickled vegetables. At the bottom of the processing cylinder (1), there is a bottom support assembly (8) for support and drainage. On one side of the processing cylinder (1), there is an external turning assembly (9) for vibrating and hitting the bottom support assembly (8). A toothed ring (3) is rotatably sleeved on the processing cylinder (1). On the toothed ring (3), there is a lifting drive assembly for driving the cutting and squeezing assembly (2) and the external turning assembly (9) to move up and down. On the processing cylinder (1), there is a rotation drive assembly for driving the toothed ring (3) to rotate.

2. The nitrite detection device for pickled vegetables according to claim 1, wherein: The cutting and squeezing assembly (2) includes a baffle plate (201). The baffle plate (201) is sleeved inside the processing cylinder (1). At the bottom end of the baffle plate (201), a plurality of cutting blades (202) are installed. Below the baffle plate (201), there is a pressing plate (203) for squeezing pickled vegetables. A plurality of knife grooves (206) are formed on the pressing plate (203). The cutting blades (202) are slidably connected to their corresponding knife grooves (206). At the top end of the pressing plate (203), two suspension rods (204) are symmetrically installed. The top ends of the suspension rods (204) penetrate above the baffle plate (201) and are fixedly connected to a top plate (205).

3. The nitrite detection device for pickled vegetables according to claim 2, wherein: Above the pressing plate (203), there is a middle connecting member (208) for exhausting gas. On the baffle plate (201), there is a clamping and positioning member (207) for clamping with the middle connecting member (208).

4. The nitrite detection device for pickled vegetables according to claim 3, characterized in that: The middle connecting member (208) includes an installation box (2081) fixedly installed at the top end of the pressing plate (203). On both side ends of the installation box (2081), side holes (2082) are symmetrically formed. At the top end of the installation box (2081), a top pipe (2083) is fixedly connected. The top end of the top pipe (2083) is fixedly connected to the top plate (205). At the bottom end of the installation box (2081), a bottom groove (2085) is formed. Inside the installation box (2081), a rotating block (2086) is rotatably installed. A through hole (2087) is formed inside the rotating block (2086). At a position on one side of the rotating block (2086) away from its center, a magnetic block (2088) is installed. On one side of the installation box (2081), an electromagnet (2084) corresponding to the magnetic block (2088) is installed.

5. The nitrite detection device for pickled vegetables according to claim 4, characterized in that: The clamping and positioning member (207) includes a middle groove (2071) formed in the baffle (201). The installation box (2081) is located inside the middle groove (2071). Activity grooves (2072) are symmetrically formed on both sides of the middle groove (2071). An activity plate (2073) is slidably connected inside the activity groove (2072). The top end of the activity plate (2073) extends to the outside of the baffle (201). Clamping rods (2074) are fixedly connected to the mutually approaching sides of the two activity plates (2073). The end of the clamping rod (2074) passes through the corresponding side hole (2082) and is inserted into the through hole (2087). A first spring (2075) is fixedly connected to the side of the activity plate (2073) away from the clamping rod (2074). The other end of the first spring (2075) is fixedly connected to the inner wall of the corresponding activity groove (2072).

6. The nitrite detection device for pickled vegetables according to claim 5, wherein: The bottom support assembly (8) includes a fixed ring (801) fixedly installed at the bottom end of the processing cylinder (1). A support plate (803) is arranged above the fixed ring (801). The outer wall of the support plate (803) is in close fit with the inner wall of the processing cylinder (1). A bottom ring (805) is arranged below the fixed ring (801). A plurality of guide rods (804) are fixedly connected between the support plate (803) and the bottom ring (805) at equal angles. A plurality of guide grooves (802) are formed in the fixed ring (801) at equal angles. The guide rods (804) are slidably connected to the corresponding guide grooves (802). A second spring (806) is sleeved on the guide rod (804). The two ends of the second spring (806) are respectively fixedly connected to the fixed ring (801) and the bottom ring (805). A bottom pipe (808) is fixedly installed at the bottom end of the support plate (803). A valve (809) is installed on the bottom pipe (808).

7. The nitrite detection device for pickled vegetables according to claim 6, characterized in that: The external turning assembly (9) includes a vertical plate (902) arranged on one side of the processing cylinder (1). A chute (904) is formed in the vertical plate (902). A slider (905) is fixedly connected to the end of the top plate (205) away from the lifting drive assembly. The slider (905) is slidably connected to the chute (904). A bottom plate (906) is fixedly installed at the bottom end of one side of the vertical plate (902). A moving pressing ball (907) is installed on the top surface of the bottom plate (906). A plurality of fixed hemispheres (807) are installed at equal angles at the bottom end of the bottom ring (805). The moving pressing ball (907) is arranged corresponding to the fixed hemispheres (807).

8. The nitrite detection device for pickled vegetables according to claim 7, characterized in that: One end of the slider (905) away from the top plate (205) is rotatably installed with a rotating cylinder (908). A communication cavity (909) is opened inside the top plate (205). Two ends of the communication cavity (909) are respectively communicated with the inner cavity of the rotating cylinder (908) and the top pipe (2083). A plurality of fan blades (911) which are obliquely arranged are equiangularly installed on the inner wall of the rotating cylinder (908). One end of the rotating cylinder (908) away from the top plate (205) is fixedly installed with a friction cylinder (912). One side of the friction cylinder (912) is provided with a friction plate (913). The friction plate (913) is fixedly installed on the vertical plate (902). The friction cylinder (912) is in close contact with the friction plate (913).

9. The nitrite detection device for pickled vegetables according to claim 8, characterized in that: The rotation driving assembly includes a gear (4). The gear (4) is meshed and connected with a toothed ring (3). A motor (5) is fixedly installed on the side wall of the processing cylinder (1). The gear (4) is fixedly connected with the output shaft of the motor (5). The lifting driving assembly includes an electric push rod (7). The electric push rod (7) is fixedly installed on the toothed ring (3). The push rod of the electric push rod (7) is fixedly connected with the top plate (205).

10. A method for detecting nitrite in pickled vegetables, based on the nitrite detection device for pickled vegetables described in claim 9, characterized in that: It includes the following steps: S1. Feeding: Driving the baffle (201) and the pressing plate (203) to move upward to open the processing cylinder (1), and putting a quantitative amount of pickled vegetables into the processing cylinder (1). S2. Cutting and crushing: Driving the pressing plate (203) to reciprocate longitudinally through the electric push rod (7), so that the cutting blade (202) reciprocates longitudinally for cutting and crushing. At the same time, the cutting blade (202) changes the cutting angle as the toothed ring (3) rotates. S3. Squeezing: After separating the baffle (201) from the pressing plate (203), driving the pressing plate (203) to move downward to squeeze the pickled vegetables that have been cut and crushed, and squeezing out the juice in the pickled vegetables. S4. Detecting: Opening the processing cylinder (1), injecting a quantitative amount of clear water into the processing cylinder (1), enabling the nitrite in the surface of the pickled vegetables and the juice to dissolve into the water and discharging the water, and detecting the nitrite content per unit volume in the water.

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