Cleaning and sterilizing device for primary processing of agricultural products

By designing a cleaning and sterilization device for agricultural products with drive components, injection components, mixing components, and spraying components, the problems of small contact area and short contact time of the sterilizing agent are solved, achieving more efficient sterilization and cleaning effects, improving the quality of agricultural products, and reducing the impact of sewage turbulence.

CN224025845UActive Publication Date: 2026-03-24HITUAN LIANGPIN (SHANDONG) SUPPLY CHAIN GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-10
Publication Date
2026-03-24

AI Technical Summary

Technical Problem

In existing cleaning and sterilization devices for primary processing of agricultural products, the contact area and contact time between the sterilizing agent and the agricultural products are small, which affects the sterilization effect and leads to difficulties in subsequent primary processing operations.

Method used

A cleaning and sterilization device was designed, comprising a drive component, a drug injection component, a stirring component, a spraying component, and a waste storage component. Impurities are removed by rotating brush rollers, the stirring component mixes the sterilizing agent and water evenly, the spraying component cleans and sterilizes from top to bottom, and the cleaning wastewater is collected.

Benefits of technology

It increases the contact area and contact time between agricultural products and fungicides, enhances the sterilization effect, improves the quality of agricultural products, and reduces the impact of wastewater on the processing environment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of agricultural product processing, and discloses a cleaning and sterilizing device for primary processing of agricultural products, which comprises a bottom plate, and further comprises a driving assembly arranged on the outer side of a rack and capable of providing rotating force for a brush roller; and the spraying assembly is arranged above the brush roller and can be used for cleaning and sterilizing the agricultural products. The brush roller is driven by the driving assembly to rotate together, so that the agricultural products are driven to move towards the discharge port, and impurities on the outer surfaces of the agricultural products are preliminarily removed; pure water and a bactericide are mixed more uniformly through the pesticide injection assembly and the stirring assembly, full contact of agricultural products and pesticide liquid is facilitated, and the sterilization effect is improved; agricultural products are cleaned and sterilized from top to bottom through the spraying assembly, so that residual soil, pesticides and germs on the outer sides of the agricultural products are removed, and the quality of the agricultural products is improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural product processing technical field, concretely is a kind of cleaning and sterilizing device for agricultural product primary processing. BACKGROUND

[0002] Agricultural product refers to the primary product derived from agriculture, i.e. plants, animals, microorganisms and their products obtained in agricultural activities. Agricultural products are the most important function of agriculture, which can directly affect the health status and basic survival needs of residents. Its core role includes ensuring food safety, promoting economic development and improving health level. After the agricultural products are harvested, the staff need to clean and sterilize them. The purpose is to remove soil, bacteria and pesticides on the surface of agricultural products to ensure the smooth progress of subsequent primary processing and ensure the safety of agricultural products for consumption.

[0003] The existing cleaning and sterilizing device for agricultural product primary processing generally immerses or sprays the harvested agricultural products in the equipment mixed with sterilizing agent for cleaning when in use. However, the sterilizing agent input port of a considerable part of the equipment is arranged at a fixed position on one side, which makes it take a long time to uniformly mix the sterilizing agent with water after the sterilizing agent enters the equipment from one side. As a result, the contact area between the agricultural products and the sterilizing agent is small, and the contact time is short, which has a certain impact on the sterilization effect of the agricultural products and is not conducive to the subsequent primary processing. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a cleaning and sterilizing device for agricultural product primary processing to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a cleaning and sterilizing device for agricultural product primary processing, comprising a bottom plate, a rack is arranged above the bottom plate, support plates are vertically installed on both sides of the bottom of the rack, the bottom of the support plate is connected with the bottom plate, a plurality of brush rollers are symmetrically arranged inside the rack, the brush rollers are rotatably connected with the inner walls on both sides of the rack, a liquid storage cylinder is arranged below the rack, the liquid storage cylinder is fixedly installed on the bottom plate, a transmission shaft is coaxially rotatably connected inside the liquid storage cylinder, the transmission shaft is designed as hollow, and further comprising:

[0006] A driving assembly is arranged outside the rack to provide rotary force for the brush rollers, a chemical liquid tank is arranged on one side of the liquid storage cylinder, an injection assembly is arranged outside the chemical liquid tank to facilitate the input of sterilizing agent into the liquid storage cylinder, and a stirring assembly is arranged outside the transmission shaft to make the sterilizing agent fully diffuse inside the liquid storage cylinder.

[0007] The spray assembly arranged above the brush roller can clean and sterilize the agricultural products, one end of the rack is provided with an inlet, the other end of the rack is provided with an outlet, and the bottom of the rack is provided with a waste storage assembly which can collect the waste water of the agricultural products.

[0008] Preferably, the driving assembly comprises a fixed seat fixed to one side of the rack, a driving motor is fixedly installed on the top of the fixed seat, one brush roller penetrates through the rack and is connected with the output end of the driving motor, the other end of the brush roller penetrates outside the rack and is fixedly connected with a double-roller chain wheel, and the adjacent double-roller chain wheels are connected through a transmission chain.

[0009] Preferably, a protective cover is arranged on the side of the rack away from the driving motor, the protective cover is located outside the double-roller chain wheel, and the protective cover is installed on the outside of the rack.

[0010] Preferably, the medicine injection assembly comprises a first liquid pump fixed to the top of the medicine liquid tank, a medicine outlet pipe is connected with the liquid inlet of the first liquid pump, one end of the medicine outlet pipe penetrates into the inside of the medicine liquid tank, a medicine inlet is arranged on the top of one side of the medicine liquid tank, a medicine inlet pipe is connected with the liquid outlet of the first liquid pump, one end of the medicine inlet pipe is connected with a rotary joint, and the bottom end of the rotary joint is connected with a transmission shaft.

[0011] Preferably, the stirring assembly comprises a first motor fixed to the top of the liquid storage cylinder, belt pulleys are fixedly installed on the output end of the first motor and the top end of the transmission shaft, the belt pulleys are connected through a transmission belt, a plurality of connecting pipes are symmetrically installed on the outside of the transmission shaft, one end of each connecting pipe is connected with the inside of the transmission shaft, the other end of each connecting pipe is fixedly connected with a first stirring paddle, a plurality of turbulence holes are arranged on the outside of the first stirring paddle, a medicine outlet is arranged in each turbulence hole, a medicine liquid channel is arranged in the first stirring paddle, the medicine liquid channel is connected with the outside through the medicine outlet, a clean water inlet is arranged on one side of the liquid storage cylinder, and a plurality of second stirring paddles are symmetrically installed on the inner wall of the liquid storage cylinder.

[0012] Preferably, the spray assembly comprises side plates fixed to the top of the rack on both sides, a plurality of distribution pipes are symmetrically arranged between the side plates, the distribution pipes are respectively connected with the side plates on both ends, a plurality of spray heads are symmetrically installed on the bottom of each distribution pipe, the liquid inlets of the spray heads are connected with the inside of the distribution pipes, a second liquid pump is arranged on one side of the liquid storage cylinder, a water outlet pipe is connected with the liquid inlet of the second liquid pump, one end of the water outlet pipe is connected with the liquid storage cylinder, a water inlet pipe is connected with the liquid outlet of the second liquid pump, and one end of each distribution pipe penetrates through the side plate and is connected with the water inlet pipe.

[0013] Preferably, the waste storage assembly comprises a waste storage cavity arranged at the bottom of the inner cavity of the rack, a drainage plate is fixedly installed on the top of the waste storage cavity, a waste outlet is arranged at the bottom of the waste storage cavity, and an electromagnetic valve is installed in the waste outlet.

[0014] Compared with the prior art, the utility model have the advantages that:

[0015] The utility model discloses a drive assembly drives the brush roller to rotate together, so one side drives agricultural products to displace to the discharge port, and the other side preliminarily removes the impurity on the surface of agricultural products, the net water and bactericide are mixed more evenly through injection medicine subassembly, stirring subassembly, and it is favorable to the sufficient contact of agricultural products and liquid medicine, has improved the sterilization effect, through the spray subassembly from top to bottom to agricultural products carries out cleaning and sterilization, so removes the soil, pesticide and bacteria of agricultural products outside, has improved the quality of agricultural products, through the storage waste subassembly to the cleaning waste water of production in the process of spraying is collected, so sewage turbulence influences the processing environment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a structure schematic diagram of cleaning and sterilization device for agricultural products preliminary processing for the utility model provides the structure schematic diagram of cleaning and sterilization device for agricultural products preliminary processing;

[0017] Figure 2 The utility model provides a structure schematic diagram of spray subassembly for the utility model provides a structure schematic diagram of spray subassembly;

[0018] Figure 3 The utility model provides a structure schematic diagram of storage waste subassembly for the utility model provides a structure schematic diagram of storage waste subassembly;

[0019] Figure 4 The utility model provides a structure schematic diagram of injection medicine subassembly for the utility model provides a structure schematic diagram of injection medicine subassembly;

[0020] Figure 5 The utility model provides a structure schematic diagram of stirring subassembly for the utility model provides a structure schematic diagram of stirring subassembly;

[0021] Figure 6 The utility model provides a first stirring paddleboard internal structure schematic diagram for the utility model provides a first stirring paddleboard internal structure schematic diagram.

[0022] In the drawing: 1, bottom plate, 2, support plate, 3, rack, 4, brush roller, 5, feed inlet, 6, discharge port, 7, liquid medicine tank, 8, liquid storage cylinder, 9, transmission shaft, 10, stirring subassembly, 101, first motor, 102, belt pulley, 103, first stirring paddleboard, 104, spoiler hole, 105, medicine outlet, 106, second stirring paddleboard, 107, clean water inlet, 108, connecting pipe, 109, liquid medicine channel, 11, injection medicine subassembly, 111, liquid medicine inlet, 112, medicine outlet pipe, 113, first liquid pump, 114, medicine inlet pipe, 115, rotary joint, 12, spray subassembly, 121, second liquid pump, 122, water outlet pipe, 123, water inlet pipe, 124, side plate, 125, distribution pipe, 126, spray head, 13, storage waste subassembly, 131, waste storage cavity, 132, drainage plate, 133, waste outlet, 14, drive assembly, 141, fixed seat, 142, drive motor, 143, double roller chain wheel, 15, protective cover. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-6 As shown in the figure, a kind of cleaning and sterilizing device for agricultural product primary processing, including bottom plate 1, bottom plate 1 top is equipped with rack 3, rack 3 both sides bottom is vertically installed with support plate 2, support plate 2 bottom is connected with bottom plate 1, rack 3 inside is symmetrically equipped with multiple brush rollers 4, brush roller 4 is respectively rotationally connected with the both sides of rack 3 inner wall, rack 3 below is equipped with liquid storage cylinder 8, liquid storage cylinder 8 is fixedly installed on bottom plate 1, coaxially rotationally connected with transmission shaft 9 in liquid storage cylinder 8, transmission shaft 9 is hollow design, still include: the drive assembly 14 for providing rotary force for brush roller 4 is arranged at the outside of rack 3, by setting drive assembly 14, can drive brush roller 4 rotation, so one side drives agricultural product displacement, one side removes the impurities on the surface of agricultural product;Liquid storage cylinder 8 one side is equipped with liquid medicine tank 7, liquid medicine tank 7 outside is equipped with injection medicine subassembly 11, to facilitate the input of bactericide to the inside of liquid storage cylinder 8, by setting injection medicine subassembly 11, can facilitate the bactericide for liquid storage cylinder 8, so as to facilitate the mixing of bactericide and clean water;Transmission shaft 9 outside is equipped with stirring subassembly 10, to make bactericide fully diffuse in the inside of liquid storage cylinder 8, by setting stirring subassembly 10, can make bactericide and clean water fully mix, so it is advantageous to improve sterilization effect;Spraying subassembly 12 for cleaning and sterilizing agricultural product is arranged above brush roller 4, by setting spraying subassembly 12, can utilize liquid medicine to clean and sterilize agricultural product from its outside, so remove the soil, pesticide and pathogen remaining on the outside of agricultural product, improve the quality of agricultural product;Rack 3 one end top is equipped with feed inlet 5, rack 3 other end bottom is equipped with discharge port 6, rack 3 bottom is equipped with waste storage subassembly 13, to facilitate the collection of cleaning waste water produced in the process of spraying, so that sewage turbulence influences processing environment.

[0025] Drive assembly 14 includes fixed seat 141 fixed on one side of rack 3, fixed seat 141 top is fixedly installed with drive motor 142, one of brush roller 4 penetrates rack 3 and is connected with the output end of drive motor 142, the other end of brush roller 4 penetrates to the outside of rack 3 and is fixedly connected with double roller sprocket 143, adjacent double roller sprocket 143 is connected through transmission chain, such as Figure 2 、 Figure 3As shown, the driving motor 142 drives one of the brush rollers 4 to rotate, and the remaining brush rollers 4 are driven to rotate through the cooperation between the double roller sprockets 143, so that the agricultural products are displaced to the discharge port 6 and the impurities on the surface of the agricultural products are preliminarily removed.

[0026] The frame 3 away from the driving motor 142 is provided with a protective cover 15 located outside the double roller sprockets 143, and the protective cover 15 is installed on the outside of the frame 3, as shown in Figure 2 As shown, the protective cover 15 can avoid the staff from being injured by directly contacting the double roller sprockets 143, and improves the safety.

[0027] The medicine injection assembly 11 includes a first liquid pump 113 fixed to the top of the liquid tank 7, and the liquid inlet of the first liquid pump 113 is connected with a medicine outlet pipe 112, one end of the medicine outlet pipe 112 penetrates into the inside of the liquid tank 7, the top of one side of the liquid tank 7 is provided with a liquid inlet 111, and the liquid outlet of the first liquid pump 113 is connected with a medicine inlet pipe 114, one end of the medicine inlet pipe 114 is connected with a rotary joint 115, and the bottom end of the rotary joint 115 is connected with the transmission shaft 9, as shown in Figure 1 , Figure 3 As shown, the first liquid pump 113 can input the sterilizing agent in the liquid tank 7 into the inside of the transmission shaft 9 through the medicine outlet pipe 112, the medicine inlet pipe 114 and the rotary joint 115, so as to facilitate the mixing of the sterilizing agent and the clean water.

[0028] The stirring assembly 10 includes a first motor 101 fixed to the top of the liquid storage cylinder 8, and the output end of the first motor 101 and the top end of the transmission shaft 9 are both fixedly installed with a belt pulley 102, the belt pulleys 102 are connected through a transmission belt, a plurality of connecting pipes 108 are symmetrically installed on the outside of the transmission shaft 9, one end of the connecting pipe 108 is connected with the inside of the transmission shaft 9, the other end of the connecting pipe 108 is fixedly connected with a first stirring paddle 103, a plurality of turbulence holes 104 are formed on the outside of the first stirring paddle 103, a medicine outlet 105 is formed in the inside of the turbulence hole 104, a liquid channel 109 is arranged in the inside of the first stirring paddle 103, the liquid channel 109 is connected with the outside through the medicine outlet 105, a clean water inlet 107 is arranged on one side of the liquid storage cylinder 8, and a plurality of second stirring paddles 106 are symmetrically installed on the inner wall of the liquid storage cylinder 8, as shown in Figure 4 , Figure 5 and Figure 6 As shown, the first motor 101 and the belt pulley 102 drive the transmission shaft 9 and the first stirring paddle 103 to rotate, and the turbulence holes 104 on the outside of the first stirring paddle 103 cooperate with the second stirring paddles 106 to make the clean water in the inside of the liquid storage cylinder 8 turbulent, and in the rotating process of the first stirring paddle 103, the clean water flowing out of the turbulence holes 104 is fully mixed with the sterilizing agent output from the medicine outlet 105, so that the clean water and the sterilizing agent are more uniformly mixed, which is beneficial to the full contact of the agricultural products and the liquid medicine and improves the sterilization effect.

[0029] The spraying assembly 12 comprises side plates 124 fixed to the top of both sides of the rack 3, a plurality of distribution pipes 125 are symmetrically arranged between the side plates 124, the distribution pipes 125 are respectively connected with the side plates 124 at both ends, a plurality of spray heads 126 are symmetrically installed at the bottom of the distribution pipes 125, the spray heads 126 are connected with the inside of the distribution pipes 125 through the liquid inlet, one side of the liquid storage cylinder 8 is provided with a second liquid pump 121, the water outlet pipe 122 is connected with the liquid inlet of the second liquid pump 121, one end of the water outlet pipe 122 is connected with the liquid storage cylinder 8, the water inlet pipe 123 is connected with the liquid outlet of the second liquid pump 121, one end of the distribution pipe 125 penetrates through the side plate 124 and is connected with the water inlet pipe 123, as shown in Figure 2 、 Figure 3 The second liquid pump 121 is used to sequentially input the mixed liquid into the inside of the distribution pipe 125 through the water outlet pipe 122 and the water inlet pipe 123, and then the liquid is cleaned and sterilized from top to bottom through the plurality of spray heads 126 at the bottom of the distribution pipe 125, so that the soil, pesticides and bacteria remaining on the outside of the agricultural products are removed, and the quality of the agricultural products is improved.

[0030] The storage and waste assembly 13 comprises a storage and waste chamber 131 arranged at the bottom of the inner cavity of the rack 3, a drainage plate 132 is fixedly installed at the top of the storage and waste chamber 131, and a waste discharge port 133 is arranged at the bottom of the storage and waste chamber 131, and an electromagnetic valve is installed in the waste discharge port 133, as shown in Figure 3 The storage and waste assembly 13 can collect the cleaning waste water produced in the spraying process, so that the sewage flow does not affect the processing environment.

[0031] Working principle: first, the staff pours the agricultural products to be cleaned and sterilized from one end of the feeding port 5, and then drives the brush roller 4 to rotate through the driving assembly 14, so that the agricultural products are displaced to the discharge port 6 while the impurities on the surface of the agricultural products are preliminarily removed, in this process, the water and the sterilizing agent are mixed more uniformly through the liquid injection assembly 11 and the stirring assembly 10, which is beneficial to the full contact of the agricultural products and the liquid, and improves the sterilization effect, and then the agricultural products are cleaned and sterilized from top to bottom through the spraying assembly 12, so that the soil, pesticides and bacteria remaining on the outside of the agricultural products are removed, the quality of the agricultural products is improved, and the cleaning waste water produced in the spraying process is collected through the storage and waste assembly 13, so that the sewage flow does not affect the processing environment.

[0032] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0033] While the embodiments of the present application have been shown and described with respect to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. Therefore, the scope of the application should not be limited by the embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims

1. A cleaning and sterilization device for primary processing of agricultural products, comprising a base plate (1), characterized in that, A frame (3) is provided above the base plate (1). Support plates (2) are vertically installed on both sides of the bottom of the frame (3). The bottom of the support plates (2) is connected to the base plate (1). Multiple brush rollers (4) are symmetrically arranged inside the frame (3). The brush rollers (4) are rotatably connected to both sides of the inner wall of the frame (3). A liquid storage tank (8) is provided below the frame (3). The liquid storage tank (8) is fixedly installed on the base plate (1). A drive shaft (9) is coaxially rotatably connected inside the liquid storage tank (8). The drive shaft (9) is hollow and also includes: A drive assembly (14) is provided on the outside of the frame (3) to provide rotational force to the brush roller (4). A liquid tank (7) is provided on one side of the liquid storage cylinder (8). An injection assembly (11) is provided on the outside of the liquid tank (7) to facilitate the input of bactericide into the liquid storage cylinder (8). A stirring assembly (10) is provided on the outside of the drive shaft (9) to allow the bactericide to be fully diffused into the liquid storage cylinder (8). A spray assembly (12) is installed above the brush roller (4) to clean and sterilize agricultural products. The top of one end of the frame (3) is provided with a feed inlet (5), and the bottom of the other end of the frame (3) is provided with a discharge outlet (6). The bottom of the frame (3) is provided with a waste storage assembly (13) for centralized collection of wastewater from agricultural product cleaning.

2. The cleaning and sterilization device for primary processing of agricultural products according to claim 1, characterized in that: The drive assembly (14) includes a fixed base (141) fixed to one side of the frame (3). A drive motor (142) is fixedly installed on the top of the fixed base (141). One brush roller (4) passes through the frame (3) and is connected to the output end of the drive motor (142). The other end of the brush roller (4) passes through the outside of the frame (3) and is fixedly connected to a double roller sprocket (143). Adjacent double roller sprockets (143) are connected by a transmission chain.

3. The cleaning and sterilization device for primary processing of agricultural products according to claim 2, characterized in that: The frame (3) is provided with a protective cover (15) on the side away from the drive motor (142). The protective cover (15) is located outside the double roller sprocket (143) and is installed on the outside of the frame (3).

4. The cleaning and sterilization device for primary processing of agricultural products according to claim 1, characterized in that: The drug injection assembly (11) includes a first liquid pump (113) fixed to the top of the liquid tank (7). The inlet of the first liquid pump (113) is connected to a drug outlet pipe (112). One end of the drug outlet pipe (112) extends into the inside of the liquid tank (7). A liquid inlet (111) is provided on the top side of the liquid tank (7). The outlet of the first liquid pump (113) is connected to a drug inlet pipe (114). One end of the drug inlet pipe (114) is connected to a rotary joint (115). The bottom end of the rotary joint (115) is connected to the drive shaft (9).

5. The cleaning and sterilization device for primary processing of agricultural products according to claim 1, characterized in that: The stirring assembly (10) includes a first motor (101) fixed to the top of the storage tank (8). Pulleys (102) are fixedly installed at the output end of the first motor (101) and at the top of the drive shaft (9). The pulleys (102) are connected to each other via a drive belt. Multiple connecting pipes (108) are symmetrically installed on the outside of the drive shaft (9). One end of each connecting pipe (108) is connected to the inside of the drive shaft (9), and the other end of each connecting pipe (108) is fixedly connected to a first stirring unit. The first stirring paddle (103) has multiple turbulence holes (104) on its outer side, and a drug outlet (105) is provided inside the turbulence holes (104). The first stirring paddle (103) has a drug liquid channel (109) inside, and the drug liquid channel (109) is connected to the outside through the drug outlet (105). The storage tank (8) has a clean water inlet (107) on one side, and multiple second stirring paddles (106) are symmetrically installed on the inner wall of the storage tank (8).

6. The cleaning and sterilization device for primary processing of agricultural products according to claim 1, characterized in that: The spray assembly (12) includes side plates (124) fixed to the top of both sides of the frame (3). Multiple distribution pipes (125) are symmetrically arranged between the side plates (124). The distribution pipes (125) are respectively connected to the two side plates (124). Multiple spray heads (126) are symmetrically installed at the bottom of the distribution pipes (125). The inlet of the spray head (126) is connected to the inside of the distribution pipe (125). A second liquid pump (121) is provided on one side of the liquid storage tank (8). The inlet of the second liquid pump (121) is connected to the outlet pipe (122). One end of the outlet pipe (122) is connected to the liquid storage tank (8). The outlet of the second liquid pump (121) is connected to the inlet pipe (123). One end of the distribution pipe (125) passes through the side plate (124) and is connected to the inlet pipe (123).

7. The cleaning and sterilization device for primary processing of agricultural products according to claim 1, characterized in that: The waste storage component (13) includes a waste storage chamber (131) located at the bottom of the inner cavity of the frame (3). A diversion plate (132) is fixedly installed on the top of the waste storage chamber (131), and a waste discharge port (133) is provided at the bottom of the waste storage chamber (131). A solenoid valve is installed inside the waste discharge port (133).