A stirring tank with quantitative discharging function for zinc-rich primer production

Abstract

The utility model discloses a kind of agitator kettle with the function of quantitative discharging of zinc-rich primer production, including agitator kettle body, the agitator kettle body is provided with the agitator mechanism for the raw materials inside the agitator kettle body is stirred and mixed, the bottom center position of the agitator kettle body is provided with discharge pipe, another end of the discharge pipe is provided with the quantitative discharging mechanism for the material inside the agitator kettle body is quantitatively discharged, the quantitative discharging mechanism is by first pneumatic diaphragm valve, connecting pipe, second pneumatic diaphragm valve, discharge pipe, conveying pipeline, first piston assembly, second piston assembly, reciprocating air cylinder and third piston assembly combination, the both ends of the connecting pipe are connected with first pneumatic diaphragm valve and second pneumatic diaphragm valve respectively by pipe joint.The utility model not only realizes the automatic quantitative discharging of zinc-rich primer after stirring and mixing is completed, but also effectively improves the accuracy of zinc-rich primer automatic quantitative discharging, and practicality is strong.

Description

Technical Field

[0001] This utility model relates to the technical field of zinc-rich primer production equipment, specifically a mixing kettle for producing zinc-rich primer with a quantitative feeding function. Background Technology

[0002] Zinc-rich primer is a special coating product composed of epoxy resin, zinc powder as the main raw materials, thickeners, fillers, additives, solvents, etc. This paint has the characteristics of fast natural drying, strong adhesion, and strong corrosion resistance. During the production of epoxy zinc-rich primer, the raw materials need to be put into a mixer for mixing.

[0003] A search revealed that patent publication number CN216440538U discloses a quantitative dispensing device for water-based industrial paint, belonging to the technical field of quantitative dispensing of water-based industrial paint. The device includes a base, a support mounted on one side of the upper surface of the base, a transmission assembly located at the top inner part of the support, a threaded shaft inside the support, a frame connected to the top of the threaded shaft, a storage hopper on one side of the top of the frame, a stirring assembly inside the storage hopper, and a discharge pipe connected to the bottom of the storage hopper. This invention uses the stirring assembly to stir the water-based industrial paint inside the storage hopper and scrape off the paint adhering to the inner wall of the storage hopper, creating a vortex state for the paint and accelerating the dispensing rate through the discharge pipe. Furthermore, the transmission assembly allows the threaded shaft to rise and fall, thereby adjusting the position and height of the discharge pipe, reducing the labor intensity of workers.

[0004] In existing zinc-rich primer production mixing tanks, after the zinc-rich primer raw materials are mixed, the workers quantitatively discharge the mixed zinc-rich primer into the storage structure. Generally, a weight detection sensor is used to detect the amount of zinc-rich primer added to the storage tank. When the weight data value detected by the weight detection sensor reaches the preset weight data value, the control component closes the valve and stops the discharge. When the discharge stops, a certain amount of zinc-rich primer will still fall into the storage structure, which will cause poor quantitative discharge accuracy. Therefore, a mixing tank for zinc-rich primer production with quantitative discharge function is designed. Utility Model Content

[0005] In view of the defects or deficiencies of the mixing tank used in the production of zinc-rich primer, the purpose of this utility model is to provide a mixing tank for the production of zinc-rich primer with a quantitative feeding function. This not only realizes the automatic quantitative feeding of zinc-rich primer after mixing, but also effectively improves the accuracy of the automatic quantitative feeding of zinc-rich primer.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: This utility model provides a mixing tank for producing zinc-rich primer with quantitative feeding function, including a mixing tank body, a mixing mechanism for mixing the raw materials inside the mixing tank body, a discharge pipe at the bottom center of the mixing tank body, and a quantitative feeding mechanism for quantitatively discharging the materials inside the mixing tank body at the other end of the discharge pipe. The quantitative feeding mechanism is composed of a first pneumatic diaphragm valve, a connecting pipe, a second pneumatic diaphragm valve, a discharge pipe, a conveying pipe, a first piston assembly, a second piston assembly, a reciprocating cylinder, and a third piston assembly. Both ends of the connecting pipe are connected to the first and second pneumatic diaphragm valves respectively through pipe joints. The other end of the first pneumatic diaphragm valve is connected to the discharge pipe through a pipe joint, and the other end of the second pneumatic diaphragm valve is connected to the discharge pipe through a pipe joint. The first piston assembly is provided on the connecting pipe.

[0007] Preferably, the stirring mechanism is composed of a geared motor, a rotating shaft and a stirring rod, wherein the geared motor is mounted on the top of the mounting frame and the mounting frame is located at the center of the top of the stirring vessel body; The output shaft of the geared motor passes through the surface of the mounting bracket and is connected to the rotating shaft via a coupling. The bottom end of the rotating shaft passes through the bearing at the center of the top of the mixing vessel and extends into the interior of the mixing vessel. A stirring rod arranged in a ring array is provided below the circumferential outer wall of the rotating shaft, and the stirring rod is located inside the mixing vessel.

[0008] Preferably, an annular protrusion is provided on the lower part of the circumferential outer wall of the mixing vessel, and a support column is installed on the lower surface of the annular protrusion. There are four support columns, which are arranged in a ring array. A support plate is provided on the inner side between the four support columns. A feeding pipe is provided on both sides of the top of the mixing vessel, and a valve body is provided on the feeding pipe.

[0009] Preferably, the first piston assembly is provided with a first piston tube, which is disposed on the circumferential outer wall of the connecting pipe, and the interior of the first piston tube is connected to the inner wall of the connecting pipe. A first rubber piston is disposed inside the first piston tube, and the first rubber piston is installed at one end of the inclined piston rod. A connecting block is installed at the other end of the inclined piston rod, and the connecting block is located outside the first piston tube. A second inclined portion and a first inclined portion are respectively provided on the front end wall and the rear end wall of the inclined piston rod.

[0010] Preferably, a reciprocating cylinder is installed on the outer wall of the other side of the connecting block. The reciprocating cylinder is installed at the top of the support base, and the support base is located on one side of the stirring vessel. A first L-shaped connecting rod and a second L-shaped connecting rod are respectively installed on both sides of the circumferential outer wall of one end of the first piston tube, and a second piston assembly and a third piston assembly are respectively provided at the other ends of the first L-shaped connecting rod and the second L-shaped connecting rod.

[0011] Preferably, both the second piston assembly and the third piston assembly are provided with a second piston tube, a second rubber piston is provided inside the second piston tube, and the second rubber piston is located at one end of the columnar piston rod. An inclined block is installed at the other end of the columnar piston rod, and the inclined block is located on the outer wall of the second piston tube.

[0012] Preferably, a spring is sleeved on the outer side of the outer wall of the cylindrical piston rod, and the spring is located between the inclined block and one end of the second piston tube. An exhaust pipe is provided at the other end of the second piston tube, and a second one-way valve is provided on the exhaust pipe. An intake pipe is provided on one side of the outer wall of the second piston tube, and a first one-way valve is provided on the intake pipe.

[0013] Preferably, the inclined block on the second piston assembly is in contact with the first inclined portion on the inclined piston rod, the inclined block on the third piston assembly is in contact with the second inclined portion on the inclined piston rod, the exhaust pipe on the second piston assembly is connected to the intake end on the first pneumatic diaphragm valve through a delivery pipe, and the exhaust pipe on the third piston assembly is connected to the intake end on the second pneumatic diaphragm valve through a delivery pipe.

[0014] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects: 1. In this utility model, through a series of structural arrangements, when the operator needs to quantitatively discharge the zinc-rich primer, after mixing in the mixing vessel, into the storage structure, the operator starts the reciprocating cylinder. When the reciprocating cylinder starts, it drives the tilting piston rod and the first rubber piston to reciprocate in a certain direction. When the reciprocating cylinder retracts, it drives the tilting piston rod and the first rubber piston to move linearly in a certain direction. At this time, the second piston assembly and the third piston assembly are in the exhaust and intake states, respectively. When the third piston assembly is in the intake state, the second pneumatic diaphragm valve is closed. The gas discharged by the second piston assembly is transported to the first pneumatic diaphragm valve through the conveying pipe. The first pneumatic diaphragm valve opens, and the mixing vessel is stirred. After mixing, the zinc-rich primer is drawn into the connecting pipe and the first piston pipe through the discharge pipe. When the reciprocating cylinder extends, it drives the tilting piston rod and the first rubber piston to move linearly in the other direction. At this time, the second piston assembly and the third piston assembly are in the intake and exhaust states, respectively. When the second piston assembly is in the intake state, the first pneumatic diaphragm valve is closed. The gas discharged by the third piston assembly is transported to the second pneumatic diaphragm valve through the conveying pipe. The second pneumatic diaphragm valve opens, and a certain amount of zinc-rich primer in the connecting pipe and the first piston pipe is discharged from the discharge pipe. Thus, this utility model not only realizes the automatic quantitative feeding of zinc-rich primer after mixing, but also effectively improves the accuracy of automatic quantitative feeding of zinc-rich primer.

[0015] 2. In this utility model, through the coordinated arrangement of a series of structures, the operator can control the amount of zinc-rich primer discharged into the storage structure by setting the piston stroke of the reciprocating cylinder, thereby further realizing the automatic and precise quantitative feeding of the zinc-rich primer after mixing. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0018] Figure 2 This is a cross-sectional view of the entire utility model.

[0019] Figure 3 This is a schematic diagram of the quantitative feeding mechanism of this utility model.

[0020] Figure 4 This is a cross-sectional view of the connection structure between the first piston assembly and the connecting pipe of this utility model.

[0021] Figure 5 This is a cross-sectional view of the second piston assembly and the third piston assembly of this utility model.

[0022] Figure 6 This is a schematic diagram of the stirring mechanism of this utility model.

[0023] In the picture: 100. Mixing vessel body; 110. Mounting bracket; 120. Feeding pipe; 130. Annular protrusion; 140. Support column; 150. Support plate; 160. Discharge pipe; 200. Stirring mechanism; 210. Gear motor; 220. Rotating shaft; 230. Stirring rod; 300. Quantitative feeding mechanism; 310. First pneumatic diaphragm valve; 320. Connecting pipe; 330. Second pneumatic diaphragm valve; 340. Discharge pipe; 350. Conveying pipe; 360. First piston assembly; 370. Second piston assembly; 380. Reciprocating cylinder; 390. Third piston assembly; 361. Inclined piston rod; 3611. Connecting block; 3612. First inclined part; 3613. Second inclined part; 3614. First rubber piston; 362. First piston tube; 3621. First L-shaped connecting rod; 3622. Second L-shaped connecting rod; 371. Columnar piston rod; 3711. Inclined block; 3712. Second rubber piston; 372. Spring; 373. Second piston tube; 3731. Intake pipe; 3732. First one-way valve; 3733. Exhaust pipe; 3734. Second one-way valve; 400. Support base. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] like Figure 1-6As shown, a mixing tank for producing zinc-rich primer with quantitative feeding function includes a mixing tank body 100, a mixing mechanism 200 for mixing the raw materials inside the mixing tank body 100, a discharge pipe 160 at the bottom center of the mixing tank body 100, and a quantitative feeding mechanism 300 for quantitatively discharging the materials inside the mixing tank body 100 at the other end of the discharge pipe 160. The quantitative feeding mechanism 300 is composed of a first pneumatic diaphragm valve 310, a connecting pipe 320, a second pneumatic diaphragm valve 330, a discharge pipe 340, a conveying pipe 350, a first piston assembly 360, a second piston assembly 370, a reciprocating cylinder 380, and a third piston assembly 390. Both ends of the connecting pipe 320 are connected to the first pneumatic diaphragm valve 310 and the second pneumatic diaphragm valve 330 respectively through pipe joints. The other end of the first pneumatic diaphragm valve 310 is connected to the discharge pipe 160 through a pipe joint, and the other end of the second pneumatic diaphragm valve 330 is connected to the discharge pipe 340 through a pipe joint. The first piston assembly 360 is provided on the connecting pipe 320.

[0028] The stirring mechanism 200 is composed of a geared motor 210, a rotating shaft 220 and a stirring rod 230. The geared motor 210 is mounted on the top of the mounting frame 110, and the mounting frame 110 is located at the center of the top of the mixing vessel 100. When the geared motor 210 is started, it will drive the rotating shaft 220 to rotate. The rotation of the rotating shaft 220 will drive the stirring rod 230 to rotate. The rotation of the stirring rod 230 will stir and mix the zinc-rich primer production raw materials in the mixing vessel 100. The output shaft of the geared motor 210 passes through the surface of the mounting bracket 110 and is connected to the rotating shaft 220 through a coupling. The bottom end of the rotating shaft 220 passes through the bearing at the center of the top of the mixing vessel 100 and extends into the interior of the mixing vessel 100. A stirring rod 230 arranged in a ring array is provided below the circumferential outer wall of the rotating shaft 220, and the stirring rod 230 is located inside the mixing vessel 100.

[0029] An annular protrusion 130 is provided on the lower part of the circumferential outer wall of the mixing vessel 100. Support columns 140 are installed on the lower surface of the annular protrusion 130. There are four support columns 140, which are arranged in a ring array. Support plates 150 are provided on the inner side between the four support columns 140. Feeding pipes 120 are provided on both sides of the top of the mixing vessel 100. A valve body is provided on the feeding pipe 120. With the feeding pipe 120, the operator can add zinc-rich primer production raw materials into the mixing vessel 100 through the feeding pipe 120.

[0030] The first piston assembly 360 is provided with a first piston tube 362, which is disposed on the circumferential outer wall of the connecting pipe 320, and the interior of the first piston tube 362 is connected to the inner wall of the connecting pipe 320. The interior of the first piston tube 362 is provided with a first rubber piston 3614, which is installed at one end of the inclined piston rod 361. The other end of the inclined piston rod 361 is provided with a connecting block 3611, which is located outside the first piston tube 362. The front end wall and the rear end wall of the inclined piston rod 361 are respectively provided with a second inclined part 3613 and a first inclined part 3612.

[0031] A reciprocating cylinder 380 is installed on the outer wall of the other side of the connecting block 3611. The reciprocating cylinder 380 is installed on the top of the support base 400, and the support base 400 is located on one side of the stirring vessel body 100. A first L-shaped connecting rod 3621 and a second L-shaped connecting rod 3622 are respectively installed on both sides of the outer wall of one end of the first piston tube 362. A second piston assembly 370 and a third piston assembly 390 are respectively provided on the other end of the first L-shaped connecting rod 3621 and the second L-shaped connecting rod 3622.

[0032] Both the second piston assembly 370 and the third piston assembly 390 are provided with a second piston tube 373. A second rubber piston 3712 is provided inside the second piston tube 373. The second rubber piston 3712 is located at one end of the columnar piston rod 371. An inclined block 3711 is installed at the other end of the columnar piston rod 371, and the inclined block 3711 is located on the outer wall of the second piston tube 373.

[0033] A spring 372 is sleeved on the outer side of the outer wall of the cylindrical piston rod 371, and the spring 372 is located between the inclined block 3711 and one end of the second piston tube 373. An exhaust pipe 3733 is provided at the other end of the second piston tube 373, and a second one-way valve 3734 is provided on the exhaust pipe 3733. The exhaust pipe 3733 and the second one-way valve 3734 are configured to allow exhaust to be discharged from the exhaust pipe 3733. An intake pipe 3731 is provided on one side of the outer wall of the second piston tube 373, and a first one-way valve 3732 is provided on the intake pipe 3731. The intake pipe 3731 and the first one-way valve 3732 are configured to allow intake to be discharged from the intake pipe 3731.

[0034] The inclined block 3711 on the second piston assembly 370 is in contact with the first inclined portion 3612 on the inclined piston rod 361. Because the inclined block 3711 on the second piston assembly 370 is in contact with the first inclined portion 3612 on the inclined piston rod 361, when the reciprocating cylinder 380 retracts, the second piston assembly 370 is in the exhaust state. When the reciprocating cylinder 380 extends, the second piston assembly 370 will be in the intake state under the rebound force of the spring 372. The inclined block 3711 on the third piston assembly 390 is in contact with the second inclined portion 3613 on the inclined piston rod 361. The inclined block 3711 on the piston assembly 390 is in contact with the second inclined portion 3613 on the inclined piston rod 361. When the reciprocating cylinder 380 extends, the third piston assembly 390 is in the exhaust state. When the reciprocating cylinder 380 retracts, the third piston assembly 390 is in the intake state under the force of the spring 372. The exhaust pipe 3733 on the second piston assembly 370 is connected to the intake end of the first pneumatic diaphragm valve 310 through the delivery pipe 350. The exhaust pipe 3733 on the third piston assembly 390 is connected to the intake end of the second pneumatic diaphragm valve 330 through the delivery pipe 350.

[0035] Working principle: When in use, connect to an external power source. When the operator needs to quantitatively discharge the zinc-rich primer, after mixing in the mixing vessel 100, into the storage structure, the operator starts the reciprocating cylinder 380. When the reciprocating cylinder 380 starts, it drives the tilting piston rod 361 and the first rubber piston 3614 to reciprocate in a certain direction. When the reciprocating cylinder 380 retracts, it drives the tilting piston rod 361 and the first rubber piston 3614 to move linearly in a certain direction. At this time, the second piston assembly... When component 370 and the third piston assembly 390 are in the exhaust and intake states respectively, and the third piston assembly 390 is in the intake state, the second pneumatic diaphragm valve 330 is closed. The gas discharged from the second piston assembly 370 is transported to the first pneumatic diaphragm valve 310 through the conveying pipe 350. The first pneumatic diaphragm valve 310 is opened, and the zinc-rich primer after mixing inside the mixing vessel 100 is drawn into the connecting pipe 320 and the first piston pipe 362 through the discharge pipe 160. When reciprocating... When cylinder 380 extends, it drives the inclined piston rod 361 and the first rubber piston 3614 to move linearly in another direction. At this time, the second piston assembly 370 and the third piston assembly 390 are in the intake and exhaust states, respectively. When the second piston assembly 370 is in the intake state, the first pneumatic diaphragm valve 310 is in the closed state. The gas discharged by the third piston assembly 390 is transported to the second pneumatic diaphragm valve 330 through the conveying pipe 350. The second pneumatic diaphragm valve 330 opens, and a certain amount of zinc-rich primer in the connecting pipe 320 and the first piston pipe 362 is discharged from the discharge pipe 340. Thus, this utility model not only realizes the automatic quantitative feeding of zinc-rich primer after mixing, but also effectively improves the accuracy of automatic quantitative feeding of zinc-rich primer. The operator can control the amount of zinc-rich primer discharged into the storage structure by setting the piston stroke of the reciprocating cylinder 380, thereby further realizing the automatic and accurate quantitative feeding of zinc-rich primer after mixing.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the invention. For those skilled in the art, various modifications and variations can be made to this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A mixing vessel for producing zinc-rich primer with a quantitative feeding function, comprising a mixing vessel body (100), characterized in that: The mixing vessel (100) is provided with a stirring mechanism (200) for stirring and mixing the raw materials inside the mixing vessel (100). A discharge pipe (160) is provided at the center of the bottom of the mixing vessel (100). A quantitative feeding mechanism (300) is provided at the other end of the discharge pipe (160) for quantitatively discharging the materials inside the mixing vessel (100). The quantitative feeding mechanism (300) is composed of a first pneumatic diaphragm valve (310), a connecting pipe (320), a second pneumatic diaphragm valve (330), a discharge pipe (340), a conveying pipe (350), a first piston assembly (360), a second piston assembly (370), a reciprocating cylinder (380), and a third piston assembly (390). Both ends of the connecting pipe (320) are connected to the first pneumatic diaphragm valve (310) and the second pneumatic diaphragm valve (330) respectively through pipe joints. The other end of the first pneumatic diaphragm valve (310) is connected to the discharge pipe (160) through a pipe joint. The other end of the second pneumatic diaphragm valve (330) is connected to the discharge pipe (340) through a pipe joint. The first piston assembly (360) is provided on the connecting pipe (320).

2. The mixing vessel for producing zinc-rich primer with quantitative feeding function according to claim 1, characterized in that: The stirring mechanism (200) is composed of a geared motor (210), a rotating shaft (220) and a stirring rod (230). The geared motor (210) is mounted on the top of the mounting frame (110), and the mounting frame (110) is located at the center of the top of the stirring vessel body (100). The output shaft of the geared motor (210) passes through the surface of the mounting bracket (110) and is connected to the rotating shaft (220) via a coupling. The bottom end of the rotating shaft (220) passes through the bearing at the center of the top of the stirring vessel (100) and extends into the interior of the stirring vessel (100). A stirring rod (230) arranged in a ring array is provided below the circumferential outer wall of the rotating shaft (220), and the stirring rod (230) is located inside the stirring vessel (100).

3. The mixing vessel for producing zinc-rich primer with quantitative feeding function according to claim 1, characterized in that: The stirring vessel body (100) has an annular protrusion (130) on its lower circumferential outer wall. The lower surface of the annular protrusion (130) is equipped with a support column (140). There are four support columns (140), which are arranged in a ring array. A support plate (150) is provided on the inner side between the four support columns (140). The top two sides of the stirring vessel body (100) are provided with feeding pipes (120), and valve bodies are provided on the feeding pipes (120).

4. The mixing vessel for producing zinc-rich primer with quantitative feeding function according to claim 1, characterized in that: The first piston assembly (360) is provided with a first piston tube (362), which is located on the circumferential outer wall of the connecting pipe (320). The interior of the first piston tube (362) is connected to the inner wall of the connecting pipe (320). The interior of the first piston tube (362) is provided with a first rubber piston (3614), which is installed at one end of the inclined piston rod (361). The other end of the inclined piston rod (361) is provided with a connecting block (3611), which is located outside the first piston tube (362). The front end wall and the rear end wall of the inclined piston rod (361) are respectively provided with a second inclined part (3613) and a first inclined part (3612).

5. The mixing vessel for producing zinc-rich primer with quantitative feeding function according to claim 4, characterized in that: A reciprocating cylinder (380) is installed on the outer wall of the other side of the connecting block (3611). The reciprocating cylinder (380) is installed on the top of the support base (400), and the support base (400) is located on one side of the stirring vessel body (100). A first L-shaped connecting rod (3621) and a second L-shaped connecting rod (3622) are respectively installed on both sides of the circumferential outer wall of one end of the first piston tube (362). A second piston assembly (370) and a third piston assembly (390) are respectively provided at the other ends of the first L-shaped connecting rod (3621) and the second L-shaped connecting rod (3622).

6. The mixing vessel for producing zinc-rich primer with quantitative feeding function according to claim 1, characterized in that: The second piston assembly (370) and the third piston assembly (390) are each provided with a second piston tube (373). The second piston tube (373) is provided with a second rubber piston (3712) inside. The second rubber piston (3712) is provided at one end of the columnar piston rod (371). The other end of the columnar piston rod (371) is equipped with an inclined block (3711), and the inclined block (3711) is located on the outer wall of the second piston tube (373).

7. The mixing vessel for producing zinc-rich primer with quantitative feeding function according to claim 6, characterized in that: A spring (372) is sleeved on the outer side of the outer wall of the cylindrical piston rod (371), and the spring (372) is located between the inclined block (3711) and one end of the second piston tube (373). An exhaust pipe (3733) is provided at the other end of the second piston tube (373), and a second one-way valve (3734) is provided on the exhaust pipe (3733). An intake pipe (3731) is provided on one side of the outer wall of the second piston tube (373), and a first one-way valve (3732) is provided on the intake pipe (3731).

8. The mixing vessel for producing zinc-rich primer with quantitative feeding function according to claim 7, characterized in that: The inclined block (3711) on the second piston assembly (370) is in contact with the first inclined portion (3612) on the inclined piston rod (361), the inclined block (3711) on the third piston assembly (390) is in contact with the second inclined portion (3613) on the inclined piston rod (361), the exhaust pipe (3733) on the second piston assembly (370) is connected to the intake end on the first pneumatic diaphragm valve (310) through the delivery pipe (350), and the exhaust pipe (3733) on the third piston assembly (390) is connected to the intake end on the second pneumatic diaphragm valve (330) through the delivery pipe (350).

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