CN116078265A

CN116078265A - Rice water quantitative proportioning feeding system

Info

Publication number: CN116078265A
Application number: CN202310150140.6A
Authority: CN
Inventors: 王静华; 徐永生; 倪贝青
Original assignee: Anhui Yunling Xinghuo Tourism Development Co ltd
Current assignee: Anhui Yunling Xinghuo Tourism Development Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-05-09

Abstract

The invention provides a quantitative rice proportioning feeding system, wherein a rice bucket is provided with a quantitative rice rotating drum, the quantitative rice rotating drum is provided with a plug, an inlet and an outlet are formed in the peripheral wall of the quantitative rice rotating drum, when the quantitative rice rotating drum rotates, the inlet and the outlet of the quantitative rice rotating drum are positioned at an upper position aligned with a rice outlet at the lower end of the rice bucket, and the inlet and the outlet are positioned at a lower position with a downward orifice, and when the inlet and the outlet are positioned at the lower position, the wall of the quantitative rice rotating drum is plugged at the rice outlet at the lower end of the rice bucket; the rice fill side is provided with the water tank, and the water tank is provided with a ration water drum, and a ration water drum includes the connecting rod, and ration water supply actuating mechanism links to each other with the connecting rod and drives the upper cover, lower cover upper and lower displacement, upper cover and upper end water inlet pressfitting, lower cover and lower end delivery port separation when the low level of downward shift, upper cover and upper end water inlet separation, lower cover and lower end delivery port top close when upwards shifting to the high level. The invention utilizes the quantitative rice drum and the quantitative water drum to ensure that the rice and water in the rice tray are in a matching relationship, and ensures that the cooked rice is proper in hardness.

Description

Rice water quantitative proportioning feeding system

Technical Field

The invention relates to a quantitative feeding device, in particular to a quantitative proportioning feeding system for rice water so as to cook ideal rice.

Background

Proper rice quantity and water quantity are needed to be determined for cooking rice, namely proper water is needed to be added into a certain amount of rice raw rice so as to ensure that the cooked rice has moderate hardness, the cooked rice can be eaten by people, and when the cooked rice is used as a raw material of rice crust, the consistency requirement of the hardness is more strict.

In the prior art, a quantitative rice feeding device for cooked rice is named as a rice distributing device (CN 108454905A-hereinafter referred to as document 1), wherein a quantitative discharging mechanism comprises a hopper 200, a discharge hole at the bottom of the hopper 200 is provided with a star-shaped discharger 201, and a lower end of the star-shaped discharger 201 is connected with a convergent guiding cylinder 212. The central shaft 213 of the star discharger 201 is of a hollow tubular structure, the flushing mechanism comprises a water supply pipe 214 inserted in the central shaft 213, the water supply pipe 214 is fixedly arranged, a water outlet 217 is arranged on the pipe wall of the water supply pipe 214, and the water outlet 217 is downwards arranged; water through holes 215 are respectively formed on the peripheral surface of the central shaft 213 between the adjacent blades 216 of the star discharger 201, and the positions of the water through holes 215 in the axial direction of the central shaft 213 correspond to the nozzles. In this document 1, the central shaft 213 is hollow and tubular so as to arrange the water supply pipe 214, in view of the fixed arrangement of the water supply pipe 214, the dynamic sealing between the two ends of the central shaft 213 and the water supply pipe 214 inevitably results in complex structure, in addition, the small water outlet flow of the water outlet 217 on the water supply pipe 214 results in low water adding efficiency and no quantitative water supply guarantee, furthermore, because the rice restrained between the adjacent blades 216 needs to be indexed along with the rotation of the central shaft 213, the rice grains between the two axial ends of the adjacent blades 216 and the outer edges of the adjacent blades 216 inevitably rub with the shell to damage the integrity of the rice grains, and the deformation of the adjacent blades 216 is difficult to avoid due to the stress, which aggravates the risk of clamping the rice grains, and the rotation of the central shaft 213 needs to be overcome regardless of manpower or power mechanism driving.

In the reference 2, a lower portion of the rice bin 1 is connected with the discharge bin 2, a storage box 3 is arranged in the discharge bin 2, a feed/discharge port 53 is formed in the quantitative drum 5 arranged in the drum limiter 6, the feed/discharge port 53 is aligned with the upper hole 63 and is fed when aligned with the lower hole 64, a large area friction is formed between a cylindrical surface of the quantitative drum 5 beside the feed/discharge port 53 and a cylindrical cavity inner wall of the drum limiter 6 except the upper hole 63 and the lower hole 64, and due to the fact that one end of the quantitative drum 5 is provided with a rotating shaft 51 matched with the rotating shaft connecting hole 62, the other end of a handle is naturally dropped to an open end of the drum limiter 6, the dead weight of the quantitative drum 5 and the received vage weight result in that the rotating shaft 51 is positioned between the rotating shaft 51 and the rotating shaft connecting hole 62, the handle end of the quantitative drum 5 is aligned with the open end of the drum limiter 6 and serious, in addition, the rotation of the quantitative drum 5 is manually operated by a worker, the efficiency is low, the labor intensity is high, and the problem that the problem of dislocation of the quantitative drum 5 and the feeding of the drum limiter 6 is solved when the quantitative drum 53 is not fed by the fact that the upper hole 64 is not completely displaced, and the problem of the quantitative drum 2 is solved.

Disclosure of Invention

The invention aims to provide a rice water quantitative proportioning feeding system, which aims to solve the problem that quantitative rice is simultaneously and proportionally fed together with proper water.

In order to achieve the above purpose, the present invention adopts the following technical scheme: a rice water proportioning feeding system is characterized in that: the upper end of the quantitative rice drum is provided with a quantitative rice drum at the rice outlet at the lower end of the rice bucket with a rice inlet, both ends of the quantitative rice drum are provided with plugs, the peripheral wall of the quantitative rice drum is provided with an inlet and an outlet, both ends of the inlet and the outlet in the axial direction correspond to the positions of the side end surfaces of the plugs in the barrel cavity, when the quantitative rice drum rotates, the driving mechanism drives the inlet and the outlet on the quantitative rice drum to be positioned at the upper position aligned with the rice outlet at the lower end of the rice bucket and the position of the inlet and the outlet to be positioned at the lower position of the orifice downwards, and when the inlet and the outlet are positioned at the lower position of the rice outlet, the barrel wall of the quantitative rice drum is blocked at the rice outlet at the lower end of the rice bucket;

the side of rice fill is provided with the water tank, the lower part of water tank is provided with the ration water drum, the barrel upper end water inlet and the water tank intercommunication of ration water drum, the ration water drum includes by vertical arrangement's connecting rod, be connected with upper cover on the connecting rod, the lower cover, interval between upper cover, the lower cover is greater than the interval between the upper end water inlet and the lower extreme delivery port of ration water drum, ration water supply actuating mechanism links to each other with the connecting rod and drives the connecting rod and drive upper cover, lower cover upper and lower displacement, upper cover and upper end water inlet pressfitting, lower cover and lower extreme delivery port separation, upper cover and upper end water inlet separation, lower cover and lower extreme delivery port top close when upwards displacing to the high position.

The quantitative rice drum provided by the invention rotates, the inlet and the outlet of the quantitative rice drum are shifted to the rice outlet at the lower end of the rice bucket, quantitative rice filled in the drum cavity can be received, then the quantitative rice is shifted to the rice falling position with the inlet and the outlet facing downwards, the quantitative rice is received by Mi Pan below the quantitative rice drum, meanwhile, the upper cover and the upper water inlet are pressed and sealed when the connecting rod moves downwards, the lower cover is separated from the lower water outlet, and quantitative water collected in the quantitative water drum flows downwards into the rice tray, so that the proper proportioning relationship between the rice and the water in the rice tray is ensured, and the boiled rice is proper in softness and hardness.

Drawings

FIG. 1 is a schematic illustration of the present invention;

FIG. 2 is a schematic structural view of a quantitative rice bowl according to the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an enlarged partial schematic view of FIG. 3;

FIG. 5 is a schematic perspective view of a quantitative rice drum according to the present invention;

FIG. 6 is a schematic structural view of a dosing cartridge of the present invention.

Detailed Description

According to the quantitative rice water proportioning feeding system provided by the invention, a quantitative rice drum 20 is arranged at a rice outlet 11 at the lower end of a rice bucket 10 of a rice inlet 12 at the upper end, a plug 21 is arranged at two ends of the quantitative rice drum 20, an inlet and an outlet 22 are arranged on the peripheral wall, two ends of the inlet and the outlet 22 in the axial direction correspond to the positions of the side end surfaces of the plug 21 in a drum cavity, when a driving mechanism 30 drives the quantitative rice drum 20 to rotate, the inlet and the outlet 22 on the quantitative rice drum 20 are positioned at an upper rice inlet position aligned with the rice outlet 11 at the lower end of the rice bucket 10 and the inlet and the outlet 22 are positioned at a lower rice outlet position with a downward orifice, and when the inlet and the outlet 22 are positioned at the lower rice outlet position, the drum wall of the quantitative rice drum 20 is blocked at the lower rice outlet 11 of the rice bucket 10;

the rice bucket 10 is provided with a water tank 40 at the side, a quantitative water drum 50 is arranged at the lower part of the water tank 40, a water inlet 55 at the upper end of a drum body of the quantitative water drum 50 is communicated with the water tank 40, the quantitative water drum 50 comprises a connecting rod 51 which is vertically arranged, an upper cover 52 and a lower cover 53 are connected to the connecting rod 51, the distance between the upper cover 52 and the lower cover 53 is larger than the distance between the upper end water inlet 55 and the lower end water outlet 54 of the quantitative water drum 50, a quantitative water supply driving mechanism 60 is connected with the connecting rod 51 and drives the connecting rod 51 to drive the upper cover 52 and the lower cover 53 to move up and down, the upper cover 52 is pressed with the upper end water inlet 55 when the quantitative water drum is shifted down, the lower cover 53 is separated from the lower end water outlet 54, and the upper cover 52 is separated from the upper end water inlet 55 when the quantitative water drum is shifted up to the upper position, and the lower cover 53 is propped against the lower end water outlet 54.

Referring to fig. 1, 2 and 3, the above scheme includes two important parts of a quantitative rice drum 20 and a quantitative water drum 50, wherein the quantitative rice drum 20 is matched with a rice outlet 11 at the lower end of a rice bucket 10, can hold quantitative rice with limited drum cavity volume, then rotates and pours the quantitative rice in the drum cavity into a rice cooking plate A, and the rice in the rice bucket 10 is clean rice;

the quantitative water in the cylinder cavity of the quantitative water cylinder 50 with the volume meeting the water quantity required by the quantitative rice cylinder 20 for cooking rice can be discharged into the rice cooking plate A, so that the quantitative rice and the quantitative water configuration with the required quantity are finished at the same time, the matching work of the water-rice matching can be obviously improved, and the invention is suitable for cooking a large amount of rice. Because the rice bucket 10 is positioned at a proper height, in order to facilitate the rice throwing operation, the rice box 1 is arranged on the field, and the lower end of the screw conveyor 2 is connected with the lower part and the upper end of the rice box 1 and extends to the bucket opening of the rice bucket 10.

In the scheme, the revolving path of the peripheral wall of the quantitative rice drum 20 is directly matched with the rice outlet 11 at the lower end of the rice bucket 10, and when the inlet and outlet 22 is positioned at the lower position of rice outlet, the wall of the quantitative rice drum 20 is blocked at the rice outlet 11 at the lower end of the rice bucket 10, so that the accuracy of quantitative rice feeding is ensured, the probability of wearing rice grains is obviously reduced, and the integrity of the rice grains is further improved; in addition, the upper water inlet 55 of the quantitative water drum 50 is directly communicated with the water tank 40, the lower cover 53 is propped against the lower water outlet 54 when the upper cover 52 is separated from the upper water inlet 55, and the quantitative water drum 50 is quickly filled with water in the water tank 40; when draining, the upper cover 52 is pressed against the upper water inlet 55, and the lower cover 53 is separated from the lower water outlet 54, so that rapid and quantitative water supply operation is ensured. The water supply and the rice supply process travel simultaneously and have the same time period, so that the efficiency of the proportioning process is improved.

For convenience of explanation, the vertical, horizontal, front-rear directions in the explanation are determined by the viewing directions shown in fig. 2, and the horizontal in fig. 1 corresponds to the front-rear positions in fig. 2.

As shown in fig. 1, 2 and 3, the front and rear edges of the rice outlet 11 at the lower end of the rice bucket 10 are equal-height parallel edges, the left and right edges are equal-diameter circular arc edges with the curvature center positioned below, the circular arc radius of the left and right edges is consistent with the radius of the quantitative rice drum 20, and the peripheral wall of the quantitative rice drum 20 and the rice outlet 11 at the lower end of the rice bucket 10 form clearance fit.

The peripheral wall of the quantitative rice rotary drum 20 and the rice outlet 11 at the lower end of the rice bucket 10 form clearance fit, so that the normal rotation of the quantitative rice rotary drum 20 is ensured, the clearance is 0.5-1 mm, and rice grains cannot be clamped or sheared at the moment. In the above scheme, the four edge parts of the rice outlet 11 at the lower end of the rice bucket 10 are in clearance fit with the quantitative rice drum 20, so that the problem that rice particles are scattered randomly is solved, and the friction contact area between the quantitative rice drum 20 and the rice outlet 11 is reduced, which is quite significant, because in order to meet the sanitary requirement, the quantitative rice drum 20 is a stainless steel thin-wall drum, the cylindricity of the quantitative rice drum 20 is difficult to ensure, and cylindrical deformation condition can occur when the quantitative rice drum 20 is impacted by rice flow frequently, even if slight deformation occurs, the friction range between the four edge parts of the rice outlet 11 and the drum wall of the quantitative rice drum 20 is only the range of line contact all the time.

The left and right sides of the rice outlet 11 at the lower end of the rice bucket 10 are provided with ferrules 13, the hole cores of the ferrules 13 are coincident with the curvature centers of the circular arc edges at the left and right end sides of the rice outlet 11, and the two ends of the quantitative rice drum 20 are in rotary fit with the ferrules 13. By arranging the ferrule 13 as a rotation support of the quantitative rice rotary drum 20, the quantitative rice rotary drum 20 has a simple structure and solves the problem of ensuring the stable position relationship of the coincidence of the drum cores of the quantitative rice rotary drum 20 and the curvature centers of the circular arc edges at the left end and the right end of the rice outlet 11.

Further, the driving mechanism 30 includes a rack 31 disposed on at least one side of the left and right sides of the rice outlet 11, the rack 31 is meshed with a gear 32 disposed at a barrel end of the quantitative rice barrel 20, a barrel core of the quantitative rice barrel 20 and a barrel core of the gear 32 are disposed in a concentric manner, the power source 33 drives the rack 31 to displace and drive the gear 32 and the quantitative rice barrel 20 to synchronously rotate, the rack 31 is disposed horizontally, the rack 31 is a gear ring sleeved on a barrel wall of the quantitative rice barrel 20, and the power source 33 is a cylinder or an electric cylinder. The power source 33 is an air cylinder or an electric cylinder, and the provided linear reciprocating motion exactly realizes the reciprocating linear motion of the rack 31 and the reciprocating rotation of the driving gear 32 for half a cycle, so as to correspond to two working positions of the inlet and outlet 22 on the quantitative rice drum 20 pointing upwards or downwards.

The above has demonstrated that the quantitative rice drum 20 in the application is made of thin-wall stainless steel plates, the accuracy of cylindricity of the bent cylindrical shape is difficult to ensure, even if a stainless steel pipe sold in the market is purchased, the stainless steel pipe is extremely easy to deform, the pipe end of the quantitative rice drum 20 is provided with a plug 21 to realize the plugging of the pipe end, the plug 21 is selected to be in transition fit with the inner cylinder wall of the quantitative rice drum 20, the tension effect for maintaining the cylindricity of the quantitative rice drum 20 can be realized by virtue of the transition fit between the plug 21 and the quantitative rice drum 20,

the barrel end of the quantitative rice rotary barrel 20 is provided with a radial arranged web member 23, a screw 24 is connected to the center of the outer end of the plug 21 positioned on the inner side of the web member 23, and the screw 24 and a nut hole in the middle of the web member 23 form threaded fit. By means of the threaded fit of the screw 24 and the nut hole in the middle of the web member 23, the position of the plug 21 in the quantitative rice drum 20 can be adjusted to repair the deformed drum wall part, and meanwhile, the inner side end face of the plug 21 can be adjusted to be flush with the opening edges of the left and right sides of the drum in the length direction of the inlet and outlet 22, so that the quantitative rice drum 20 can be thoroughly poured every time.

Since the quantitative rice drum 20 is a stainless steel thin-wall tube, the maintenance of the outline shape of the orifice edge of the inlet and outlet 22 is extremely important, and in combination with fig. 3 and 4, the problem is mainly represented that when the quantitative rice drum 20 rotates clockwise, the orifice area of the inlet and outlet 22 has a natural expanding trend and the squeezing effect after filling rice, when the front edge 22A of the orifice of the inlet and outlet 22 is shifted to the relative position of the rear edge 11B of the rice outlet 11, the gap reserved between the quantitative rice drum 20 and the rice outlet 11 is small, namely 0.5-1 mm, because the gap is too large, the phenomenon of leaking rice is caused, and the front edge 22A is beyond the reserved gap and appears as the rear edge 11B of the rice outlet 11 is positioned on the path of the deformed front edge 22A, thereby preventing the quantitative rice drum 20 from rotating clockwise further, and the invention provides a corresponding solution, namely the circumferentially extending arc-shaped ribs 221 at the inlet and outlet 22 of the quantitative rice drum 20. The arc rib 221 is naturally reserved when the inlet and outlet 22 is opened, so that smoothness of the joint of the arc rib 221 and the edge of the inlet and outlet 22 is ensured, the arc rib 221 limits the tendency of outward expansion deformation of the front side edge 22A and the rear side edge 22B of the inlet and outlet 22, and even if outward expansion deformation of the front side edge 22A and the rear side edge 22B of the inlet and outlet 22 occurs, the rear edge 11B of the rice outlet 11 always presses on the arc rib 221 when the quantitative rice drum 20 rotates, and the arc rib 221 can always guide the front side edge 22A of the inlet and outlet 22 to shrink inwards and smoothly rotate past the rear edge 11B of the rice outlet 11 to continue clockwise downward rotation.

To improve the efficiency of rice feeding and discharging, the opening of the inlet and outlet 22 in the circumferential direction is one third of the circumference. Another advantage of selecting such a circumferential opening is that the likelihood of free expansion deformation of the ports 22, particularly the outward expansion deformation of the front and

rear side edges

22A, 22B, is significantly reduced.

Preferably, the arc ribs 221 are arranged at intervals of 1 to 4 in the axial direction of the inlet and outlet 22. The arc rib 221 should be mainly provided with a proper width, that is, an axial width, so that when the inlet and outlet 22 falls down to rice, little rice remained on the arc rib 221 is preferably not remained, the width of the arc rib 221 is about 5mm, and almost no rice remains on the arc rib 221 due to the flushing of rice flow during rice falling.

The lower water outlet 54 is connected with a diversion trench 70, the diversion trench 70 and the lower cover 53 at the low position are at the avoiding position, and the diversion direction of the diversion trench 70 points to the lower part of the rice outlet position of the inlet and outlet 22 on the quantitative rice drum 20. As shown in fig. 1, since the water tank 40 is disposed at the side of the rice bucket 10 and both the water tank 40 and the rice bucket 10 occupy a certain space, the diversion trench 70 completes the diversion of water onto or near the rice flow path, and both water and rice are smoothly thrown into the rice cooking pan a.

Referring to fig. 1 and 6, the upper end of the link 51 extending toward the upper end of the tank 40 is connected to a constant water supply driving mechanism 60, and the constant water supply driving mechanism 60 drives the link 51, the upper cover 52, and the lower cover 53 to move up and down synchronously. In the above-mentioned scheme, the advantage of the quantitative water supply driving mechanism 60 disposed at the upper end of the water tank 40 is that the arrangement of the diversion trench 70 is convenient, and the water flow path is shortened to reduce the phenomenon that the water flow impacts the rice cooking plate a, so that the splash phenomenon is avoided.

The quantitative water supply driving mechanism 60 is an air cylinder or an electric cylinder, and the air cylinder or the electric cylinder is selected as the quantitative water supply driving mechanism 60, so that the quantitative water supply driving mechanism has a simple structure and quick response.

The upper plate surfaces of the upper cover 52 and the lower cover 53 are provided with seals, and the seals are matched with the upper water inlet 51 and the lower water outlet 54. By adopting the sealing scheme, the water leakage of the lower water outlet 54 of the quantitative water drum 50 and the water inflow of the upper water inlet 51 during water discharge are avoided, and the stability and reliability of quantitative water supply are provided. A water level sensor 41 is provided in the water tank 40 to collect a water level signal for controlling timely water replenishment.

Claims

1. A rice water ration feed system, its characterized in that: a quantitative rice drum (20) is arranged at a rice outlet (11) at the lower end of a rice bucket (10) with a rice inlet (12) at the upper end, a plug (21) is arranged at two ends of the quantitative rice drum (20), an inlet and an outlet (22) are arranged on the peripheral wall, two ends of the inlet and the outlet (22) in the axial direction correspond to the side end surface position of the plug (21) in a drum cavity, when the quantitative rice drum (20) is driven to rotate by a driving mechanism (30), the inlet and the outlet (22) on the quantitative rice drum (20) are positioned at an upper rice inlet position aligned with the rice outlet (11) at the lower end of the rice bucket (10) and the outlet (22) is positioned at a lower rice outlet position with a downward orifice, and when the outlet and the outlet (22) is positioned at the lower rice outlet position, the drum wall of the quantitative rice drum (20) is blocked at the rice outlet (11) at the lower end of the rice bucket (10);

the rice bucket (10) is provided with a water tank (40) by the side, the lower part of the water tank (40) is provided with a quantitative water drum (50), a water inlet (55) at the upper end of a drum body of the quantitative water drum (50) is communicated with the water tank (40), the quantitative water drum (50) comprises a connecting rod (51) which is vertically arranged, an upper cover (52) and a lower cover (53) are connected to the connecting rod (51), the distance between the upper cover (52) and the lower cover (53) is larger than the distance between the water inlet (55) at the upper end of the quantitative water drum (50) and a water outlet (54) at the lower end, a quantitative water supply driving mechanism (60) is connected with the connecting rod (51) and drives the connecting rod (51) to drive the upper cover (52) and the lower cover (53) to move up and down, the upper cover (52) is pressed with the upper water inlet (55) and the lower cover (53) is separated from the water outlet (54) at the lower end when the quantitative water drum is moved up to a high position.

2. The rice water dosing system of claim 1, wherein: the front and rear opening edges of the rice outlet (11) at the lower end of the rice bucket (10) are equal-height parallel edges, the left and right end edges are equal-diameter circular arc edges with the curvature center positioned below, the circular arc radius of the left and right end edges is consistent with the radius of the quantitative rice rotary drum (20), and the peripheral wall of the quantitative rice rotary drum (20) is in clearance fit with the rice outlet (11) at the lower end of the rice bucket (10).

3. The rice water dosing system of claim 1 or 2, wherein: the left and right sides of a rice outlet (11) at the lower end of the rice bucket (10) are provided with ferrules (13), the hole cores of the ferrules (13) are coincident with the curvature centers of the circular arc edges at the left and right end sides of the rice outlet (11), and the two ends of the quantitative rice rotary drum (20) are in running fit with the ferrules (13).

4. The rice water dosing system of claim 1 or 2, wherein: the driving mechanism (30) comprises racks (31) arranged on at least one side of the left side and the right side of the rice outlet (11), the racks (31) are meshed with gears (32) arranged at the barrel ends of the quantitative rice rotary barrel (20), barrel cores of the quantitative rice rotary barrel (20) and wheel cores of the gears (32) are arranged in the same core, and the power source (33) drives the racks (31) to displace and drive the gears (32) and the quantitative rice rotary barrel (20) to synchronously rotate.

5. The rice water dosing system of claim 4, wherein: the rack (31) is horizontally arranged, the rack (31) is a gear ring sleeved on the wall of the quantitative rice drum (20), and the power source (33) is an air cylinder or an electric cylinder.

6. The rice water dosing system of claim 1 or 2, wherein: the quantitative rice rotary drum (20) is a stainless steel thin-wall drum, and the plug (21) is in transition fit with the inner drum wall of the quantitative rice rotary drum (20).

7. The rice water dosing system of claim 6, wherein: the barrel end of the quantitative rice rotary barrel (20) is provided with a radial arranged web member (23), a screw rod (24) is connected to the center of the outer end of the plug (21) positioned on the inner side of the web member (23), and the screw rod (24) is in threaded fit with a nut hole in the middle of the web member (23).

8. The rice water dosing system of claim 6, wherein: the inlet and outlet (22) of the quantitative rice drum (20) is provided with arc ribs (221) extending in the circumferential direction.

9. The rice water dosing system of claim 6, wherein: the opening of the inlet and outlet (22) in the circumferential direction is one third of the circumference, and the arc ribs (221) are arranged at intervals of 1-4 in the axial direction of the inlet and outlet (22).

10. The rice water dosing system of claim 1, wherein: the lower water outlet (54) is connected with a diversion trench (70), the diversion trench (70) and the lower cover (53) at a low position are at an avoidance position, and the diversion direction of the diversion trench (70) points to the lower part of the rice outlet position of the inlet and outlet (22) on the quantitative rice drum (20).

11. The rice water dosing system of claim 1, wherein: the upper end of the connecting rod (51) extending to the upper end tank opening of the water tank (40) is connected with the quantitative water supply driving mechanism (60), the quantitative water supply driving mechanism (60) drives the connecting rod (51), the upper cover (52) and the lower cover (53) to synchronously move up and down, and the quantitative water supply driving mechanism (60) is an air cylinder or an electric cylinder.

12. The rice water dosing system of claim 1, wherein: the upper plate surface of the upper cover (52) and the upper plate surface of the lower cover (53) are provided with seals, and a sealing fit is formed between the upper water inlet (51) and the lower water outlet (54).