Double-cylinder quantifying machine capable of automatically recycling and cleaning

Abstract

The invention discloses a double-cylinder quantifying machine capable of automatically recycling and cleaning, and belongs to the technical field of packaging equipment. Comprising a base, two quantitative mechanisms and a pipeline assembly, the two quantitative mechanisms are symmetrically arranged on the base, the bottom output ends of the quantitative mechanisms communicate with the pipeline assembly, each quantitative mechanism comprises a shell, a cylinder body, a supporting frame, a piston, a pushing assembly and a cleaning assembly, a guide rod is arranged at the top of each piston, and each cleaning assembly is arranged on the bottom side of the corresponding guide rod and comprises a scraping ring and two guide pipes. The scraping ring fixedly sleeves the upper side of the guide rod, a liquid storage cavity is formed in the top end of the shell, the two guide pipes fixedly sleeve the top end of the cylinder body, the top ends of the guide pipes are located in the liquid storage cavity, the top ends of the guide pipes are bent downwards, the rear side of the shell is connected with an external pump body device, and the input end of the pump body device is communicated with the liquid storage cavity. The piston can move up and down. The problem that residual materials on the inner wall of the cylinder body are not recycled in time, and waste is caused is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and particularly to a double-cylinder metering machine with automatic recycling and cleaning. Background Art

[0002] A packaging machine is a type of machine that packages products, playing a role in protection and aesthetics. The discharging device on the packaging machine extrudes the processed materials, and the extruded materials enter the packaging bag. In the prior art, the discharging devices of packaging machines mostly use metering machine equipment to ensure the accuracy of packaging.

[0003] In the prior art, for example, the utility model patent with the publication number CN208559894U discloses a quantitative extrusion device for lubricating grease packaging, and the utility model patent with the publication number CN211139744U discloses a discharging device of a packaging machine. The quantitatively measured materials are pushed and extruded by the movement of the piston push plate. Due to long-term use, the piston and the cylinder body are worn, resulting in poor sealing, and materials will remain on the inner wall of the cylinder body. If not recycled in time, it will cause waste. Summary of the Invention

[0004] The purpose of the present invention is to provide a double-cylinder metering machine with automatic recycling and cleaning, so as to solve the problem proposed in the above background art that due to long-term use, the piston and the cylinder body are worn, resulting in poor sealing, materials will remain on the inner wall of the cylinder body, and waste will be caused if not recycled in time.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A double-cylinder metering machine with automatic recycling and cleaning, comprising: a base, two groups of metering mechanisms, and a pipeline assembly. The two groups of metering mechanisms are symmetrically arranged on the base, and the bottom output ends of both are communicated with the pipeline assembly; The metering mechanism includes a housing, a cylinder body, a support frame, a piston, a pushing assembly, and a cleaning assembly. The support frame is fixedly installed on the base, the housing is vertically and fixedly installed on the top of the support frame, the cylinder body is vertically and rotatably sleeved in the housing, and the piston is vertically and slidably sleeved in the cylinder body; A guide rod is provided at the top of the piston, and the cleaning assembly is arranged at the bottom side of the guide rod; The cleaning assembly includes a scraping ring and two guide pipes. The scraping ring is fixedly sleeved on the upper side of the guide rod. A liquid storage cavity is opened at the top end of the housing. The two guide pipes are both fixedly sleeved on the top end of the cylinder body, and the top ends of both are located in the liquid storage cavity. The top ends of the guide pipes are bent downward. The rear side of the housing is connected to an external pump device, and the input end of the pump device is communicated with the liquid storage cavity; The pushing assembly is arranged at the top end of the guide rod and is used for the up and down movement of the piston; A constant temperature mechanism is arranged on the side of the housing to ensure a constant temperature inside the metering mechanism.

[0006] Preferably, a plurality of first ball bearings are rollingly embedded in the side wall of the guide rod. An installation groove is vertically formed at the top of the piston. The guide rod is vertically arranged in the installation groove. The plurality of first ball bearings are in rolling contact with the installation groove. A sleeve is fixedly installed at the top end of the cylinder block. A lead screw groove is formed on the outer side of the guide rod. The lead screw groove is spiral. A plurality of second ball bearings are rollingly embedded in the inner wall of the sleeve. The plurality of second ball bearings are all rollingly embedded in the lead screw groove.

[0007] Preferably, the pipeline assembly includes a pipe joint, a bracket and two feeding components. The bracket is vertically and fixedly installed on the base. The pipe joint is fixedly sleeved on the bracket. The feeding component includes a three-way joint, a first electromagnetic valve, a second electromagnetic valve and a connecting pipe. The three-way joint is fixedly embedded at the bottom end of the housing and is rotatably connected to the bottom end of the cylinder block at the top end. The first electromagnetic valve is fixedly installed on the side of the three-way joint and is used for fixedly connecting with the output end of an external feeding device. The second electromagnetic valve is fixedly installed at the bottom end of the three-way joint. The two ends of the connecting pipe are respectively fixedly connected and communicated with the second electromagnetic valve and the pipe joint.

[0008] Preferably, a bladder is fixedly embedded on the outer side of the piston. A pressure mechanism is arranged in the installation groove. A cavity is formed on the inner side of the top of the scraping ring. The bladder and the cavity are both connected and communicated with the pressure mechanism.

[0009] Preferably, the pressure mechanism includes a cylinder body, a sealing block, two sliding rods, two third ball bearings, two flexible hoses and two connecting pipes. The cylinder body is vertically and fixedly installed in the piston. The sealing block is hermetically and vertically slidably sleeved in the cylinder body. Sliding openings are vertically formed on both sides of the cylinder body. The two sliding rods are horizontally and symmetrically fixedly installed on both sides of the sealing block. The two third ball bearings are respectively rollingly embedded at the outer ends of the two sliding rods. An annular clamping groove is formed on the inner wall of the bottom end of the guide rod. The two third ball bearings are rollingly embedded in the clamping groove. An inserting pipe is rotatably installed at the top end of the cylinder body. The two flexible hoses penetrate and are fixedly sleeved in the scraping ring and the guide rod. The two ends of the flexible hoses are respectively fixedly connected and communicated with the side of the inserting pipe and the inside of the cavity. The two connecting pipes are both horizontally and fixedly installed in the piston. The two ends of the connecting pipes are respectively fixedly connected and communicated with the inside of the bottom side of the cylinder body and the inside of the bladder.

[0010] Preferably, a suction mechanism is arranged on the bottom side of the scraping ring. The suction mechanism includes a groove ring, a plurality of diversion components and a transmission component. The diversion component includes an elbow pipe, a turbine, a rotating shaft and a shaft sleeve. The elbow pipe is fixedly sleeved in the scraping ring. The shaft sleeve is horizontally fixedly installed on the inner side of the elbow pipe. The rotating shaft is horizontally rotatably sleeved in the shaft sleeve. The turbine is fixedly sleeved at the end of the rotating shaft located in the elbow pipe.

[0011] Preferably, the transmission component includes a plurality of first gears, a first toothed ring, and a plurality of connecting rods. The plurality of connecting rods are all vertically and fixedly installed at the top of the piston. The inner wall of the first toothed ring is fixedly connected to the tops of the plurality of connecting rods, and the plurality of first gears are respectively fixedly sleeved on the ends of the plurality of rotating shafts.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the piston returns, the scraping ring scrapes the inner wall of the cylinder body where the material has just been extruded, and the external pump body device starts to suck, cleaning the residual material cleaned from the inner wall of the cylinder body, realizing the recovery and cleaning of the material, and reducing waste; 2. During the process of pushing the material, under the action of the suction mechanism, the inner wall of the cylinder body is preliminarily cleaned and recovered, improving the cleaning efficiency; 3. When the guide rod moves up and down, with the cooperation of the pressure mechanism, the scraping ring and the bladder contract and expand, ensuring the operation while reducing the contact time with the cylinder body, thereby reducing wear, and further ensuring the sufficiency of material pushing and recovery. Description of the Drawings

[0013] Figure 1 is a three-dimensional structural schematic diagram of a double-cylinder metering machine with automatic recovery and cleaning proposed by the present invention; Figure 2 is a front-view partial cross-sectional structural schematic diagram of a double-cylinder metering machine with automatic recovery and cleaning proposed by the present invention; Figure 3 is a front-view partial cross-sectional structural schematic diagram of the metering mechanism in a double-cylinder metering machine with automatic recovery and cleaning proposed by the present invention; Figure 4 is Figure 3 an enlarged view of the structure at A in Figure 5 is Figure 3 an enlarged view of the structure at B in Figure 6 is Figure 3 an enlarged view of the structure at C in Figure 7 is Figure 3 an enlarged view of the structure at D in

[0014] In the figure: 1, base; 2, housing; 3, cylinder block; 4, support frame; 5, piston; 6, guide rod; 7, scraping ring; 8, conduit; 9, liquid storage cavity; 10, first ball; 11, placement groove; 12, pipe joint; 13, bracket; 14, three-way joint; 15, first solenoid valve; 16, second solenoid valve; 17, connecting pipe; 18, sleeve; 19, lead screw groove; 20, second ball; 21, bladder; 22, cavity; 23, cylinder; 231, insertion tube; 24, sealing block; 25, slide bar; 26, third ball; 27, hose; 28, connecting tube; 29, sliding port; 30, card slot; 31, groove ring; 32, elbow pipe; 33, turbine; 34, rotating shaft; 35, shaft sleeve; 36, first gear; 37, first toothed ring; 38, connecting rod; 39, main shaft; 40, wave wheel; 41, electrode ring; 42, storage cavity; 43, second gear; 44, second toothed ring; 45, telescopic cylinder; 46, column. Detailed implementation manner

[0015] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0016] Refer to Figures 1-7 , an automatic recovery and cleaning double-cylinder metering machine, comprising: a base 1, two groups of metering mechanisms and a pipeline assembly. The two groups of metering mechanisms are symmetrically arranged on the base 1, and the bottom output ends are both communicated with the pipeline assembly; The metering mechanism includes a housing 2, a cylinder block 3, a support frame 4, a piston 5, a pushing assembly and a cleaning assembly. The support frame 4 is fixedly installed on the base 1, the housing 2 is vertically and fixedly installed on the top of the support frame 4, the cylinder block 3 is vertically rotatably sleeved in the housing 2, and the piston 5 is vertically slidably sleeved in the cylinder block 3; A guide rod 6 is provided at the top of the piston 5, and the cleaning assembly is arranged on the bottom side of the guide rod 6; The cleaning assembly includes a scraping ring 7 and two conduits 8. The scraping ring 7 is fixedly sleeved on the upper side of the guide rod 6. A liquid storage cavity 9 is opened at the top end of the housing 2. The two conduits 8 are both fixedly sleeved at the top end of the cylinder block 3, and the top ends are both located in the liquid storage cavity 9. The top ends of the conduits 8 are both bent downward. The rear side of the housing 2 is connected to an external pump device, and the input end of the pump device is communicated with the liquid storage cavity 9; The pushing assembly is arranged at the top end of the guide rod 6 and is used for the up and down movement of the piston 5. The pushing mechanism includes a telescopic cylinder 45 and multiple columns 46. The multiple columns 46 are all vertically and fixedly installed at the top end of the housing 2. The telescopic cylinder 45 is vertically and fixedly installed at the top ends of the multiple columns 46, and the output end is fixedly connected to the top end of the guide rod 6; A constant temperature mechanism is arranged on the side of the housing 2 to ensure a constant temperature inside the metering mechanism.

[0017] Each electrical device is powered by an external power supply, and the entire device is controlled by a control terminal. Since the control terminal is a common device and belongs to the existing mature technology, the electrical connection relationship and the specific circuit structure thereof will not be elaborated herein.

[0018] A plurality of first balls 10 are rollingly embedded on the side wall of the guide rod 6. An installation groove 11 is vertically opened at the top of the piston 5. The guide rod 6 is vertically arranged in the installation groove 11. The plurality of first balls 10 are in rolling contact with the installation groove 11. A sleeve 18 is fixedly installed at the top end of the cylinder block 3. A lead screw groove 19 is opened on the outer side of the guide rod 6. The lead screw groove 19 is spiral. A plurality of second balls 20 are rollingly embedded on the inner wall of the sleeve 18. The plurality of second balls 20 are all rollingly embedded in the lead screw groove 19.

[0019] The pipeline assembly includes a pipe joint 12, a bracket 13 and two sets of material guiding components. The bracket 13 is vertically and fixedly installed on the base 1. The pipe joint 12 is fixedly sleeved on the bracket 13. The material guiding components include a three-way joint 14, a first solenoid valve 15, a second solenoid valve 16 and a connecting pipe 17. The three-way joint 14 is fixedly embedded at the bottom end of the housing 2 and is rotatably connected to the bottom end of the cylinder block 3 at the top end. The first solenoid valve 15 is fixedly installed on the side of the three-way joint 14 and is used for fixedly connecting with the output end of an external feeding device. The second solenoid valve 16 is fixedly installed at the bottom end of the three-way joint 14. The two ends of the connecting pipe 17 are respectively fixedly connected and communicated with the second solenoid valve 16 and the pipe joint 12.

[0020] A bladder 21 is fixedly embedded on the outer side of the piston 5. A pressure mechanism is arranged in the installation groove 11. A cavity 22 is opened on the inner side of the top of the scraping ring 7. The bladder 21 and the cavity 22 are both connected and communicated with the pressure mechanism.

[0021] The pressure mechanism includes a cylinder body 23, a sealing block 24, two sliding rods 25, two third balls 26, two hoses 27 and two connecting pipes 28. The cylinder body 23 is vertically and fixedly installed in the piston 5. The sealing block 24 is hermetically and vertically slidably sleeved in the cylinder body 23. Sliding openings 29 are vertically opened on both sides of the cylinder body 23. The two sliding rods 25 are horizontally and symmetrically fixedly installed on both sides of the sealing block 24. The two third balls 26 are respectively rollingly embedded at the outer ends of the two sliding rods 25. An annular clamping groove 30 is opened on the inner wall of the bottom end of the guide rod 6. The two third balls 26 are rollingly embedded in the clamping groove 30. With the cooperation of the third balls 26 and the clamping groove 30, the sliding rod 25 can move up and down along with the guide rod 6 and can also rotate along with the cylinder body 23. An insertion pipe 231 is rotatably installed at the top end of the cylinder body 23. The two hoses 27 penetrate and are fixedly sleeved in the scraping ring 7 and the guide rod 6. The two ends of the hoses 27 are respectively fixedly connected and communicated with the side of the insertion pipe 231 and the inside of the cavity 22. The two connecting pipes 28 are both horizontally and fixedly installed in the piston 5. The two ends of the connecting pipes 28 are respectively fixedly connected and communicated with the inner side of the bottom end of the cylinder body 23 and the inside of the bladder 21.

[0022] A suction mechanism is provided on the bottom side of the scraping ring 7. The suction mechanism includes a groove ring 31, multiple groups of flow guiding components, and a transmission component. The flow guiding components include an elbow pipe 32, a turbine 33, a rotating shaft 34, and a bushing 35. The elbow pipe 32 is fixedly sleeved inside the scraping ring 7. The bushing 35 is horizontally and fixedly installed inside the elbow pipe 32. The rotating shaft 34 is horizontally rotatably sleeved inside the bushing 35. The turbine 33 is fixedly sleeved at the end of the rotating shaft 34 located inside the elbow pipe 32.

[0023] The transmission component includes multiple first gears 36, a first toothed ring 37, and multiple connecting rods 38. The multiple connecting rods 38 are all vertically and fixedly installed at the top end of the piston 5. The inner wall of the first toothed ring 37 is fixedly connected to the top ends of the multiple connecting rods 38. The multiple first gears 36 are respectively fixedly sleeved at the ends of the multiple rotating shafts 34.

[0024] When using this device for quantitative conveying, the external material supply device is opened through the first solenoid valve 15, and the second solenoid valve 16 is cut off to supply material into the cylinder body 3, so that the material fills the inner area of the cylinder body 3 at the bottom side of the piston 5. Then the first solenoid valve 15 is cut off, the second solenoid valve 16 is conducted, the telescopic cylinder 45 extends, driving the guide rod 6 to move downward. The guide rod 6 pushes the piston 5 to move downward, extruding the material, and pushing the material into the pipe joint 12 through the second solenoid valve 16 and the connecting pipe 17 to achieve the delivery of the material. Then the telescopic cylinder 45 shortens, driving the guide rod 6 to move upward. At the same time, the first solenoid valve 15 is opened, the second solenoid valve 16 is cut off, and the supply device supplies material into the cylinder body 3 to prepare for the next quantitative conveying.

[0025] When extruding the material and the piston 5 returns, the scraping ring 7 scrapes the inner wall of the cylinder body 3 where the material has just been extruded, and aggregates the residual material scraped down to the bottom side inside the scraping ring 7. After the piston 5 reaches the upper limit position, the input end of the conduit 8 contacts the inside of the scraping ring 7, and the external pump body device starts to suck, cleaning out the residual material cleaned from the inner wall of the cylinder body 3 to achieve the recovery and cleaning of the material and reduce waste.

[0026] When pushing and extruding, the guide rod 6 moves downward, driving the third ball 26 and the slide rod 25 to move downward through the card slot 30, thereby pushing the sealing block 24 to move downward. The medium located at the bottom side of the sealing block 24 inside the cylinder body 23 is injected into the inside of the bladder 21 through two connecting pipes 28, causing the bladder 21 to expand and closely contact the inner wall of the cylinder body 3 to achieve sealing. The piston 5 moves downward to push the material. Since the sealing block 24 moves downward, the regional space above the sealing block 24 inside the cylinder body 23 becomes larger, and the medium inside the cavity 22 at the top of the scraping ring 7 is drawn out through two flexible hoses 27, causing the top tip of the scraping ring 7 to contract. When the piston 5 moves downward to push, the scraping ring 7 does not function, and the contraction can avoid contact with the inner wall of the cylinder body 3, thereby reducing wear. When the pushing is completed, the guide rod 6 moves upward, driving the sealing block 24 to move upward, thereby causing the bladder 21 to contract, reducing the wear between the bladder 21 and the inner wall of the cylinder body 3. The top of the scraping ring 7 is tightened and closely contacts the inner wall of the cylinder body 3 to clean the residual material.

[0027] When the guide rod 6 moves upward and downward, with the cooperation of the pressure mechanism, the scraping ring 7 and the bladder 21 contract and expand, ensuring the operation while reducing the contact time with the cylinder block 3, thereby reducing wear and ensuring sufficient material pushing and recycling.

[0028] When the guide rod 6 moves downward, with the cooperation of the lead screw groove 19 and the second ball 20, the sleeve 18 rotates, and the sleeve 18 drives the cylinder block 3 to rotate. Since the guide rod 6 moves downward, the bladder 21 expands, causing the piston 5 to be fully pressed against the inner wall of the cylinder block 3. Supported by a plurality of first balls 10, the bottom end of the guide rod 6 moves to the bottom end of the placement groove 11, causing the first gear ring 37 to mesh with a plurality of first gears 36. Since the bladder 21 expands fully and fits tightly against the inner wall of the cylinder block 3, when pushing the material, the piston 5 will rotate with the rotation of the cylinder block 3, thereby driving the first gear ring 37 to rotate through a plurality of connecting rods 38. The first gear ring 37 drives a plurality of first gears 36 to rotate, and the first gears 36 drive the turbine 33 to rotate through the rotating shaft 34, so that the turbine 33 generates a suction effect, guiding the residual material on the inner wall of the cylinder block 3 into the elbow 32 and then transporting it to the inside of the scraping ring 7. When the guide rod 6 moves upward, the first gear ring 37 disengages from the first gear 36, and the turbine 33 does not rotate. At this time, the top end of the scraping ring 7 expands and contacts the inner wall of the cylinder block 3 for scraping and cleaning and recycling.

[0029] During the process of pushing the material, under the action of the suction mechanism, the inner wall of the cylinder block 3 is preliminarily cleaned and recycled, improving the cleaning efficiency.

[0030] The two groups of metering mechanisms work alternately. When one group pushes the material, the other group feeds the material, shortening the conveying cycle and improving the packaging efficiency.

[0031] The constant temperature mechanism includes linkage components, a plurality of main shafts 39, a plurality of wave wheels 40, and a plurality of electrode rings 41. A storage cavity 42 is formed in the inner wall of the housing 2, and a dielectric liquid is filled in the storage cavity 42. A plurality of main shafts 39 are vertically and rotatably installed in the storage cavity 42, and a plurality of wave wheels 40 are respectively fixedly sleeved on the plurality of main shafts 39. A plurality of electrode rings 41 are respectively rotatably sleeved on the tops of the plurality of main shafts 39, and the plurality of electrode rings 41 are connected by an electric circuit. The main shafts 39 and the wave wheels 40 are connected to the electric circuit for heating and maintaining a constant temperature.

[0032] The linkage components include a plurality of second gears 43 and a second gear ring 44. A plurality of second gears 43 are respectively fixedly sleeved on the tops of the plurality of main shafts 39, and the second gear ring 44 is fixedly sleeved on the top of the cylinder block 3 and meshed with the plurality of second gears 43.

[0033] The main shafts 39 and the wave wheels 40 are both made of resistive materials and can generate heat. An insulating layer is provided in the area where the main shafts 39 contact the housing 2, and the second gears 43 are made of insulating materials.

[0034] When the cylinder block 3 rotates, it drives the second gear ring 44 to rotate. The second gear ring 44 drives a plurality of second gears 43 to rotate, so that multiple main shafts 39 drive the agitator 40 located thereon to rotate, heating the medium liquid sufficiently, thereby ensuring that the cylinder block 3 is heated evenly and ensuring the quality balance of material transportation.

[0035] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-cylinder quantitative machine for automatic recovery and cleaning, comprising: A base (1), two sets of quantitative mechanisms and a pipeline assembly, wherein the two sets of quantitative mechanisms are symmetrically arranged on the base (1), and the bottom output ends are both connected to the pipeline assembly; The invention is characterized in that the quantitative mechanism comprises a housing (2), a cylinder (3), a support frame (4), a piston (5), a pushing assembly and a cleaning assembly, wherein the support frame (4) is fixedly mounted on the base (1), the housing (2) is vertically fixedly mounted on the top of the support frame (4), the cylinder (3) is vertically rotatably sleeved in the housing (2), and the piston (5) is vertically slidably sleeved in the cylinder (3); A guide rod (6) is provided on the top of the piston (5), and the cleaning assembly is arranged on the bottom side of the guide rod (6); The cleaning assembly comprises a scraper ring (7) and two conduits (8), the scraper ring (7) being fixedly sleeved on the upper side of the guide rod (6), the top end of the shell (2) being provided with a liquid storage chamber (9), the two conduits (8) being fixedly sleeved on the top end of the cylinder body (3), and the top ends of the two conduits (8) being located in the liquid storage chamber (9), the top ends of the conduits (8) being bent downward, the rear side of the shell (2) being connected to an external pump device, and the input end of the pump device being in conduction with the liquid storage chamber (9); The pushing assembly is arranged at the top end of the guide rod (6) and is used for the up and down movement of the piston (5); A constant temperature mechanism is provided on the side of the shell (2) for ensuring that the temperature inside the quantitative mechanism is constant.

2. The automatic recycling and cleaning double-cylinder quantitative machine according to claim 1 is characterized in that: A plurality of first balls (10) are rollingly embedded in the side wall of the guide rod (6); a placement groove (11) is vertically opened on the top of the piston (5); the guide rod (6) is vertically arranged in the placement groove (11); the plurality of first balls (10) are in rolling contact with the placement groove (11); a sleeve (18) is fixedly mounted on the top of the cylinder body (3); a guide groove (19) is opened on the outside of the guide rod (6); the guide groove (19) is spiral-shaped; a plurality of second balls (20) are rollingly embedded in the inner wall of the sleeve (18); the plurality of second balls (20) are all rollingly embedded in the guide groove (19).

3. The automatic recycling and cleaning double-cylinder quantitative machine according to claim 1 is characterized in that: The pipeline assembly comprises a pipe joint (12), a bracket (13) and two groups of material guide components. The bracket (13) is vertically fixedly mounted on the base (1). The pipe joint (12) is fixedly sleeved on the bracket (13). The material guide components comprise a three-way joint (14), a first solenoid valve (15), a second solenoid valve (16) and a connecting pipe (17). The three-way joint (14) is fixedly embedded in the bottom end of the housing (2), and the top end is rotatably connected to the bottom end of the cylinder body (3). The first solenoid valve (15) is fixedly mounted on the side of the three-way joint (14) and is used for being fixedly connected to the output end of an external material feeding device. The second solenoid valve (16) is fixedly mounted on the bottom end of the three-way joint (14). The two ends of the connecting pipe (17) are respectively fixedly connected and conducted with the second solenoid valve (16) and the pipe joint (12).

4. The automatic recovery and cleaning double-cylinder quantitative machine according to claim 2 is characterized in that: A capsule (21) is fixedly embedded on the outside of the piston (5), a pressure mechanism is provided in the placement groove (11), a cavity (22) is provided on the inside of the top of the scraper ring (7), and both the capsule (21) and the cavity (22) are connected to the pressure mechanism.

5. The double-cylinder quantitative machine for automatic recovery and cleaning according to claim 4 is characterized in that: The pressure mechanism comprises a cylinder (23), a sealing block (24), two sliding rods (25), two third balls (26), two hoses (27) and two connecting pipes (28); the cylinder (23) is vertically fixedly mounted in the piston (5); the sealing block (24) is sealed and vertically slidably sleeved in the cylinder (23); sliding openings (29) are vertically opened on both sides of the cylinder (23); the two sliding rods (25) are horizontally symmetrically fixedly mounted on both sides of the sealing block (24); the two third balls (26) are respectively rollingly embedded in the outer ends of the two sliding rods (25); the guide rods (6) An annular groove (30) is provided on the inner wall of the bottom end, and the two third balls (26) are rotatably embedded in the groove (30). A plug (231) is rotatably mounted on the top of the cylinder (23). Two hoses (27) are inserted through and fixedly sleeved in the scraper ring (7) and the guide rod (6). The two ends of the hoses (27) are respectively fixedly connected to the side of the plug (231) and the inside of the cavity (22). The two connecting pipes (28) are both horizontally fixedly mounted in the piston (5). The two ends of the connecting pipes (28) are respectively fixedly connected to the inside of the bottom end side of the cylinder (23) and the inside of the capsule (21).

6. The automatic recovery and cleaning double-cylinder quantitative machine according to claim 1, characterized in that: A suction mechanism is provided on the bottom side of the scraper ring (7), the suction mechanism comprising a groove ring (31), a plurality of groups of flow guide components and a transmission component, the flow guide component comprising a curved pipe (32), a turbine (33), a rotating shaft (34) and a shaft sleeve (35), the curved pipe (32) being fixedly sleeved in the scraper ring (7), the shaft sleeve (35) being horizontally fixedly mounted on the inner side of the curved pipe (32), the rotating shaft (34) being horizontally rotatably sleeved in the shaft sleeve (35), and the turbine (33) being fixedly sleeved on the end of the rotating shaft (34) located in the curved pipe (32).

7. The automatic recovery and cleaning double-cylinder quantitative machine according to claim 6, characterized in that: The transmission component comprises a plurality of first gears (36), a first gear ring (37) and a plurality of connecting rods (38). The plurality of connecting rods (38) are vertically fixedly mounted on the top of the piston (5). The inner wall of the first gear ring (37) is fixedly connected to the top of the plurality of connecting rods (38). The plurality of first gears (36) are respectively fixedly sleeved on the ends of the plurality of rotating shafts (34).

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