CN214004038U - Formula of turning back duplex position liquid filling machine of weighing - Google Patents

Abstract

The application provides a formula of turning back duplex position liquid filling machine of weighing, through input conveyer and with input conveyer isometric, parallel placement, but the opposite output conveyor of direction of delivery carry the filling bucket, realized that the reciprocating motion of single stroke can accomplish a filling, also convenient the removal simultaneously, reduced area, through the propelling movement filling bucket earlier carry out the filling under second filling mouth earlier, later filling bucket arrives immediately under first filling mouth, then carries out the filling again, carry out earlier filling in advance, shortened the filling cycle, improve the productivity. The action of the whole set of equipment is controlled by a PLC program, so that double-station weighing and filling can be realized, the maximum productivity can be realized, and meanwhile, any single-station independent weighing and filling can be set at will according to the actual productivity.

Description

Formula of turning back duplex position liquid filling machine of weighing

Technical Field

The application relates to a device for controlling the quantity of canned materials, in particular to a turning-back type double-station weighing filling machine.

Background

In the chemical industry, medicine, food industry, etc., some liquid needs to be filled into a cylinder to realize the metering filling of materials, especially liquid finished products, and the equipment for realizing the function becomes a weighing filling machine.

The existing weighing filling machines can increase the number of filling stations to two in order to improve the filling efficiency, and the weighing filling machines are generally called as double-station weighing filling machines.

However, in the conventional double-station weighing filling machine, double stations are arranged between an input conveyor and an output conveyor, a pushing mechanism for pushing filling barrels needs to push empty barrels from the input conveyor to a conveying table type weighing instrument, and also needs to push filled barrels from the conveying table type weighing instrument to the output conveyor, and the double-station weighing filling machine has the following technical defects:

(1) the occupied area is large;

(2) because the filling port, the weighing instrument, the cover placing device and the cover sealing device of the existing double-station weighing filling machine are separately arranged, the filling barrel can finish one-time filling only by repeatedly conveying the filling barrel on a conveying belt in a reciprocating way in order to realize operations of weighing, cover placing, cover sealing and the like after filling and filling;

(3) the filling cycle is long, resulting in low production efficiency.

Disclosure of Invention

The technical problem that this application embodiment will solve provides a formula duplex position of turning back liquid filling machine of weighing, realizes that the reciprocating motion of single stroke can accomplish the filling to reduce its area when shortening its filling cycle.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

the embodiment of the application provides a formula duplex position of turning back liquid filling machine of weighing, its characterized in that includes:

the frame is a rectangular frame provided with a demarcation rod;

the conveying mechanism is used for conveying the filling barrel, is arranged in the rack and comprises an input conveyor, an output conveyor which is equal to the input conveyor in length, is arranged in parallel and is opposite to the conveying direction, and a first driving device and a second driving device which respectively drive the input conveyor and the output conveyor to operate through a transmission mechanism;

the weighing mechanism is arranged in the rack and comprises a first assembly line weighing instrument arranged at the end point of the input conveyor and a second assembly line weighing instrument arranged on the output conveyor, the first assembly line weighing instrument and the second assembly line weighing instrument respectively comprise a table type weighing instrument, a conveying piece with a transmission mechanism and arranged above the table type weighing instrument, and a third driving device which is arranged below the table type weighing instrument and used for driving the conveying piece through the transmission mechanism;

the filling mechanism comprises supporting frames respectively arranged on the left side and the right side of the rack, a first filling opening which is arranged above the first assembly line weighing instrument and supported by the supporting frames, and a second filling opening which is arranged above the second assembly line weighing instrument and supported by the supporting frames;

the pushing mechanism is arranged at the tail end of the filling mechanism on the rack, and comprises a first air cylinder and a pushing arm, wherein the telescopic rod of the first air cylinder is vertical to the conveying direction of the conveying mechanism in the telescopic direction, and the pushing arm is vertically arranged at the tail end of the telescopic rod;

and blocking rods for blocking the filling barrel from moving inertially are arranged on one sides of the first assembly line weighing instrument and the second assembly line weighing instrument, which are close to the pushing mechanism.

In the embodiment, the filling barrels are continuously arranged at the input end of the input conveyor, when the previous filling barrel is conveyed to the first assembly line weighing instrument by the input conveyor, the telescopic rod of the first air cylinder contracts to drive the push arm to push the filling barrel to the second assembly line weighing instrument, at the moment, the third driving device of the second assembly line weighing instrument does not work, and when the second assembly line weighing instrument senses the filling barrel, the valve of the second filling opening is opened for filling; after the telescopic rod extends to enable the push arm to return to the original position, the subsequent filling barrel immediately reaches the first assembly line weighing instrument, at the moment, a third driving device of the first assembly line weighing instrument does not work, and a valve of a first filling opening is opened for filling; after first assembly line weighing instrument and second assembly line weighing instrument sensed respective filling barrel respectively and all filled, the third drive arrangement of second assembly line weighing instrument starts, its transport piece carries preceding filling barrel to output conveyer, the flexible arm shrink of first cylinder drives and pushes away the arm and will follow filling barrel propelling movement to second assembly line weighing instrument this moment, the transport piece of second assembly line weighing instrument also carries the filling barrel after to output conveyer immediately, output conveyer carries two filling barrels to the output end in proper order immediately.

In one embodiment, in the pushing mechanism, a sliding block is arranged below a connecting portion of the pushing arm and the end of the telescopic rod, a sliding rail corresponding to the sliding block is arranged on the rack on one side of the pushing mechanism facing the conveying mechanism, and a traveling direction of the sliding block on the sliding rail is parallel to a telescopic direction of the telescopic rod.

In this embodiment, because only for a long time rely on the telescopic link to drive the arm that pushes away and will fill filling barrel propelling movement to second assembly line weighing instrument, make the telescopic link profit tired and buckle easily, consequently through setting up the slider on slide rail and the connecting portion on the frame, can avoid the telescopic link to bear the stress at the filling barrel in-process that the propelling movement was filled, avoid the telescopic link to buckle and scrap.

In one embodiment, a conveying roller is arranged between the first production line weighing instrument and the second production line weighing instrument, and the central axis of the conveying roller is perpendicular to the telescopic direction of the telescopic rod.

It can be appreciated that by the transfer roller, the resistance of the filling tank, particularly a filled filling tank, in the process of being pushed from the first pipeline weighing instrument to the second pipeline weighing instrument can be effectively reduced.

In one embodiment, a telescopic guide mechanism is respectively arranged on two sides of the input conveyor, and the guide mechanism comprises at least two internal thread pipes vertically arranged on the rack at equal intervals, a cantilever rod vertically penetrating through the internal thread pipes and extending above the input conveyor, a screw screwed into the internal thread pipes to fix the cantilever rod, a clamping piece arranged at the tail end of the cantilever rod above the input conveyor, and a guide rod of which the central axis is parallel to the conveying direction of the input conveyor after being clamped by the clamping piece.

In this embodiment, since the input conveyor vibrates during the operation, the empty filling barrel is easy to swing left and right during the conveying process due to its dead weight and stops moving when running to the frame, and therefore, by providing the guide mechanism, the filling barrel can stably move to the first pipeline weighing instrument under the guidance of the guide rods on both sides of the filling barrel by stretching the cantilever rod according to the diameter of the barrel body of the filling barrel and fixing the cantilever rod by screwing the screw rod.

In one embodiment, the support frame includes a cantilever member disposed on the top of the weighing mechanism and used for supporting the first filling opening or the second filling opening, a screw nut transmission mechanism disposed on the frame, a rotating handle disposed on the outer side wall of the frame, a vertical switching mechanism disposed in the frame and respectively connected to a rotating shaft of the rotating handle and a screw rod, a nut fixedly connected to the cantilever member, a sleeve sleeved on the nut and fixedly connected to the cantilever member, a handle disposed on the side wall of the sleeve, and a limit screw fixed to the rotation center of the handle, penetrating through the sleeve, and abutting against the nut.

In the embodiment, the handle is gripped and the rotating handle is rotated, so that the screw rod rotates and the nut ascends or descends, and further the first filling opening and the second filling opening on the cantilever part ascend or descend, and the fold-back type double-station weighing filling machine is suitable for filling barrels with different heights.

In one embodiment, the input conveyor, the output conveyor and the conveying element are roller conveyors, the first driving device, the second driving device and the third driving device are motors, the transmission mechanism comprises at least one pair of roller gears arranged on one side of the roller close to the outside of the rack, a shaft lever gear arranged at the tail end of a shaft lever of the motor, and a chain connecting the roller gears and the shaft lever gear.

It can be understood that under the rotation of the motor, the roller can rotate through the chain in the transmission mechanism.

In one embodiment, a cover placing device is arranged in the middle of the output conveyor.

In one embodiment, a capping device is provided on the output conveyor on the side of the capping device adjacent the output end.

In an implementation mode, the device further comprises an anti-dripping device which is respectively arranged on the support frame below the first filling opening and the second filling opening, and comprises a second cylinder which is horizontally arranged and a material receiving disc which is arranged at the tail end of a telescopic rod of the second cylinder.

In this embodiment, when first filling mouth, second filling mouth stop the filling, can have the liquid water clock phenomenon by accident, through setting up telescopic take-up (stock) pan, can avoid the liquid water clock to within first assembly line weighing instrument and the second flowing water weighing instrument.

In one embodiment, limiting devices are respectively arranged on the barrel inlet side of the first assembly line weighing instrument, the barrel inlet side of the cover placing device and the barrel inlet side of the cover sealing device.

In this embodiment, the limiting device may be a limiting rod which can be extended and retracted in the vertical direction, and when the limiting rod is raised, the filling barrel is blocked.

Compared with the prior art, the embodiment of the application has the following beneficial effects:

(1) the filling barrels are conveyed by the input conveyor and the output conveyors which are equal in length to the input conveyor, are arranged in parallel and are opposite in conveying direction, the filling barrels on the two stations are filled and weighed, then the filling barrels on the two stations enter the output conveyor one by one and are covered and sealed one by one, and the filling can be finished by conveying each filling barrel back and forth once, so that the occupied area is reduced;

(2) the first filling barrel is pushed to the position below the second filling opening for filling, the second filling barrel immediately reaches the position below the first filling opening, and then filling is carried out, so that the filling period is shortened.

(3) The filling barrel is conveyed by the input conveyor and the output conveyors which are equal in length to the input conveyor, are arranged in parallel and are opposite in conveying direction, so that workers can face the barrel inlet end and the barrel outlet end when standing at an operation station, barrel placing and barrel taking operations can be realized by only one worker, and the labor cost of enterprises is greatly reduced.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings used in the embodiments will be briefly described below.

Fig. 1 is a perspective view of a folding-type double-station weighing and filling machine according to an embodiment of the present disclosure, at a viewing angle of an operator, where a direction of an arrow in the drawing is a traveling direction of a filling barrel;

FIG. 2 is a perspective view of the embodiment of FIG. 1 from another perspective angle;

fig. 3 is a perspective view of a fold-back double-station weighing and filling machine according to an alternative embodiment of the present disclosure;

fig. 4 is an exploded view of a weighing mechanism of a foldback double-station weighing and filling machine according to an alternative embodiment of the present disclosure;

fig. 5 is a schematic perspective view of a filling mechanism in a fold-back double-station weighing and filling machine according to an alternative embodiment of the present disclosure;

FIG. 6 is an enlarged view taken at circle in FIG. 2;

to facilitate an understanding of the present application, the corresponding numbering of the components and/or features found in the drawings is provided as follows:

1. a frame; 100. a demarcation rod; 2. a conveying mechanism; 21. an input conveyor; 22. an output conveyor; 23. a first driving device; 24. a second driving device; 3. a weighing mechanism; 31. a first assembly line weighing instrument; 32. a second in-line weighing instrument; 301. a desk-top weighing apparatus; 302. a conveying member; 303. a third driving device; 41. a support frame; 411. a support member; 413. rotating the handle; 414. a vertical conversion mechanism; 415. a sleeve; 416. a grip; 417. a limit screw; 418. a screw rod; 419. a nut; 410. a rotating shaft; 42. a first filling port; 43. a second filling port; 51. a first cylinder; 52. a push arm; 53. a slider; 54. a slide rail; 55. a telescopic rod; 56. a connecting portion; 6. a arresting bar; 7. a transfer roller; 8. a guide mechanism; 81. an internally threaded tube; 82. a cantilever bar; 83. a screw; 84. a clamping member; 85. a guide bar; 9. a cover placing device; 10. a capping device; 11. a shaft lever; 12. a shaft gear; 13. a drip-proof device; 131. a second cylinder; 132. a take-up pan; 14. a limiting device; 15. accumulating and placing the roller; 16. a roller gear;

it should be understood that the drawings are not necessarily drawn to scale. It should be apparent that the above drawings are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and the technical solutions in the embodiments may be combined with each other, but it is necessary to be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

It should be noted that if directional indications (such as … …, which is up, down, left, right, front, back, top, bottom, inner, outer, vertical, transverse, longitudinal, counterclockwise, clockwise, circumferential, radial, axial) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative position relationship, motion condition, etc. of the components in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description in the embodiments of the present application referring to "first" or "second", etc., the description of "first" or "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1, fig. 2, fig. 4 and fig. 6 together, an embodiment of the present application provides a fold-back type double-station weighing and filling machine, which includes a frame 1 provided with a demarcation rod 100, a conveying mechanism 2 disposed inside the frame 1 for conveying a filling barrel, a weighing mechanism 3 disposed inside the frame 1, a filling mechanism, and a pushing mechanism disposed on the frame 1 at a terminal end where the filling mechanism is located;

the conveying mechanism 2 comprises an input conveyor 21, an output conveyor 22 which is equal to the input conveyor 21 in length, is arranged in parallel and has the opposite conveying direction, and a first driving device 23 and a second driving device 24 which respectively drive the input conveyor 21 and the output conveyor 22 to operate through a transmission mechanism;

the weighing mechanism 3 comprises a first assembly line weighing instrument 31 arranged at the end point of the input conveyor 21 and a second assembly line weighing instrument 32 arranged on the output conveyor 22, the first assembly line weighing instrument 31 and the second assembly line weighing instrument 32 respectively comprise a table type weighing instrument 301, a conveying piece 302 with a transmission mechanism and arranged above the table type weighing instrument 301, and a third driving device 303 arranged below the table type weighing instrument 301 and used for driving the conveying piece 302 through the transmission mechanism;

the filling mechanism comprises a support frame 41 respectively arranged on the left side and the right side of the frame 1, a first filling opening 42 arranged above the first assembly line weighing instrument 31 and supported by the support frame 41, and a second filling opening 43 arranged above the second assembly line weighing instrument 32 and supported by the support frame 41;

the pushing mechanism comprises a first air cylinder 51 with an expansion rod 55 extending and contracting direction vertical to the conveying direction of the conveying mechanism 2, and a pushing arm 52 vertically arranged at the tail end of the expansion rod 55;

and blocking rods 6 for blocking the filling barrel which moves inertially are arranged on one sides of the first assembly line weighing instrument 31 and the second assembly line weighing instrument 32 close to the pushing mechanism.

In this embodiment, two filling barrels are respectively placed on the input end of the input conveyor 21 at a certain time interval, when the previous filling barrel is conveyed to the first pipeline weighing instrument 31 by the input conveyor 21, the telescopic rod 55 of the first cylinder 51 is contracted to drive the push arm 52 to push the filling barrel to the second pipeline weighing instrument 32, and at this time, the third driving device 303 of the second pipeline weighing instrument 32 does not work; after the telescopic rod 55 is extended to return the push arm 52 to the original position, the following filling barrel immediately reaches the first assembly line weighing instrument 31, at the moment, the third driving device 303 of the first assembly line weighing instrument 31 does not work, and the filling mechanism fills the two filling barrels; after first assembly line weighing instrument 31 and second assembly line weighing instrument sensed respectively that respective filling barrel all filled up, the third drive arrangement 303 of second assembly line weighing instrument 32 starts, its transport piece 302 carries preceding filling barrel to output conveyer 22, the flexible arm shrink of first cylinder 51 drives push arm 52 with filling barrel propelling movement after to second assembly line weighing instrument 32 this moment, the transport piece 302 of second assembly line weighing instrument 32 also carries filling barrel after to output conveyer 22 immediately, output conveyer 22 carries to the output along with the two filling barrels in proper order soon.

Further, referring to fig. 1, fig. 2, fig. 4 and fig. 6, as an alternative embodiment, in the pushing mechanism, a sliding block 53 is disposed below a connecting portion 56 of the pushing arm 52 and the end of the telescopic rod 55, a sliding rail 54 corresponding to the sliding block 53 is disposed on the frame 1 on a side of the pushing mechanism facing the conveying mechanism 2, and a traveling direction of the sliding block 53 on the sliding rail 54 is parallel to a telescopic direction of the telescopic rod 55. Because only rely on the telescopic link 55 to drive push arm 52 to promote the filling bucket propelling movement to second assembly line weighing instrument 32 that fills for a long time, make the telescopic link 55 profit tired and buckle easily, consequently through setting up slide rail 54 and the slider 53 on the connecting portion 56 on frame 1, can avoid telescopic link 55 to bear the stress at the filling bucket in-process of propelling movement, avoid telescopic link 55 to buckle and scrap.

Further, referring to fig. 1, fig. 2, fig. 4 and fig. 6, as an alternative embodiment, a conveying roller 7 is disposed between the first in-line weighing apparatus 31 and the second in-line weighing apparatus 32, and a central axis of the conveying roller 7 is perpendicular to the extending and retracting direction of the telescopic rod 55. By means of the conveyor roller 7, the resistance of the filling tank, in particular of a filled filling tank, during the pushing from the first line scale 31 to the second line scale 32 can be effectively reduced.

Further, referring to fig. 1 to fig. 3, as an alternative embodiment, a telescopic guide mechanism 8 is respectively disposed on two sides of the input conveyor 21, where the guide mechanism 8 includes at least two internal threaded pipes 81 vertically disposed on the frame 1 at equal intervals, a cantilever rod 82 vertically penetrating through the internal threaded pipes 81 and extending above the input conveyor 21, a screw 83 screwed into the internal threaded pipes 81 to fix the cantilever rod 82, a clamping member 84 disposed at a terminal of the cantilever rod 82 above the input conveyor 21, and a guide rod 85 having a central axis parallel to the conveying direction of the input conveyor 21 after being clamped by the clamping member 84. Because the input conveyor 21 vibrates during operation, the empty filling barrel is easy to swing left and right during the conveying process due to the over-light dead weight and runs onto the frame 1 to stop moving, and therefore, by arranging the guide mechanism 8, the cantilever rod 82 is extended and contracted according to the barrel body diameter of the filling barrel and is fixed by screwing the screw 83, and finally, the filling barrel stably moves to the position above the first assembly line weighing instrument 31 under the guide of the guide rods 85 on the two sides of the filling barrel.

Further, referring to fig. 1 to fig. 3, fig. 5 and fig. 6, as an alternative embodiment, the supporting frame 41 includes a cantilever member disposed on the top of the weighing mechanism 3 and used for supporting the first filling opening 42 or the second filling opening 43, a screw nut transmission mechanism disposed on the frame 1, a rotating handle 413 disposed on the outer side wall of the frame 1, a vertical conversion mechanism 414 disposed in the frame 1 and respectively connected to a rotating shaft 410 of the rotating handle 413 and a screw 418, the cantilever member is fixedly connected to a nut 419 of the screw nut transmission mechanism, a sleeve 415 sleeved on the nut 419 and fixedly connected to the cantilever member, a grip 416 disposed on the side wall of the sleeve 415, and a limit screw 417 fixed to the rotating center of the grip 416, penetrating the sleeve 415, and abutting against the nut 419. By gripping the grip 416 and rotating the rotating handle 413, the screw rod 418 rotates and the nut 419 ascends or descends, so that the cantilever part and the first filling opening 42 and the second filling opening 43 on the cantilever part ascend or descend, and the fold-back type double-station weighing filling machine is suitable for filling barrels with different heights.

Further, referring to fig. 2, as an alternative embodiment, the input conveyor 21, the output conveyor 22 and the conveying element 302 are roller conveyors, the first driving device 23, the second driving device 24 and the third driving device 303 are all motors, the transmission mechanism includes at least a pair of roller gears disposed on one side of the rollers near the outside of the frame 1, a shaft gear 12 disposed at the end of the shaft 11 of the motor, and a chain connecting the roller gear 16 and the shaft gear 12. Under the rotation of the motor, the roller can rotate through a chain in the transmission mechanism.

Further, referring to fig. 3, as an alternative embodiment, a cover placing device 9 is disposed in the middle of the output conveyor 22.

Further, referring to fig. 3, as an alternative embodiment, a capping device 10 is disposed on the output conveyor 22 on the side of the cap placing device 9 close to the output end.

The working process of the folding type double-station weighing filling machine provided by the embodiment of the application is described in detail below.

When a plurality of filling barrels are respectively arranged on the input end of the input conveyor 21, and the prior filling barrel is conveyed to the first production line weighing instrument 31 through the input conveyor 21, the telescopic rod 55 of the first air cylinder 51 is contracted to drive the push arm 52 to push the filling barrel to the second production line weighing instrument 32, a sensor of the weighing instrument transmits a signal to the PLC, the PLC immediately sends out a filling instruction after detecting that the barrel is empty, the material receiving disc 132 is contracted, the second filling opening 43 is opened for filling, and at the moment, the third driving device 303 of the second production line weighing instrument 32 does not work; after the telescopic rod 55 is extended to return the push arm 52 to the original position, the following filling barrel immediately reaches the first assembly line weighing instrument 31, at the moment, the third driving device 303 of the first assembly line weighing instrument 31 does not work, and the filling mechanism repeatedly performs the first detection and then fills the filling barrel; when a rear filling barrel enters a filling area, a sensor is arranged on the input conveyor 21, when the sensor senses that the filling barrel enters the first assembly line weighing area, the limiting device 14 below jacks up the limiting rod, and the barrel on the input conveyor 21 is temporarily intercepted; after the second in-line weigher senses that the filling barrels are full, the third driving device 303 is started, the conveying part 302 conveys the prior filling barrels to the output conveyor 22, the telescopic arm of the air cylinder contracts to drive the push arm 52 to push the subsequent filling barrels to the second in-line weigher 32, and the conveying part 302 of the second in-line weigher 32 conveys the subsequent filling barrels to the output conveyor 22.

After filling, the sensor at the bottom of the second weighing instrument transmits a signal to the PLC, the PLC immediately sends an instruction to the third driving device 303, the filling barrel is conveyed to the output conveyor 22, because the program sets the travel time, when the filling barrel enters under the cover placing device 9, the lower jacking mechanism jacks up the limiting rod to temporarily intercept the barrel, the barrel in a static state receives the cover conveyed by the cover placing device 9, the output conveyor 22 does not need to stop, after the action is completed, the limiting rod of the jacking mechanism descends, and the output conveyor 22 outputs the barrel to the direction of the cover sealing device 10.

The process sets the travel time, when the conveying filling barrel with the cover reaches the lower part of the capping device 10, the lower jacking mechanism jacks up the limiting rod to temporarily intercept the filling barrel, the accumulation and release roller 15 arranged side by side with the output conveyor 22 is started under the gravity according to the clutch function of the accumulation and release roller 15, the accumulation and release roller 15 stops rotating under the state that the output conveyor 22 does not need to be stopped, the static barrel is pressed by the capping device 10, after the action is finished, the jacking mechanism resets, the clutch function of the accumulation and release roller 15 is closed, the output conveyor 22 outputs the filling barrel outwards, and the process is finished.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. The utility model provides a formula of turning back duplex position liquid filling machine of weighing which characterized in that includes:

the rack (1) is a rectangular frame;

the conveying mechanism (2) is used for conveying filling barrels and comprises an input conveyor (21), an output conveyor (22) which is equal to the input conveyor (21), is arranged in parallel and has the opposite conveying direction, and a first driving device (23) and a second driving device (24) which respectively drive the input conveyor (21) and the output conveyor (22) to operate through a transmission mechanism;

the weighing mechanism (3) comprises a first assembly line weighing instrument (31) arranged at the end point of the input conveyor (21) and a second assembly line weighing instrument (32) arranged on the output conveyor (22), the first assembly line weighing instrument (31) and the second assembly line weighing instrument (32) respectively comprise a table type weighing instrument (301), a conveying piece (302) with a transmission mechanism and a third driving device (303), the conveying piece (302) is arranged above the table type weighing instrument (301), and the third driving device (303) is arranged below the table type weighing instrument (301) and used for driving the conveying piece (302) through the transmission mechanism;

the filling mechanism comprises supporting frames (41) respectively arranged on the left side and the right side of the rack (1), a first filling opening (42) which is arranged above the first assembly line weighing instrument (31) and supported by the supporting frames (41), and a second filling opening (43) which is arranged above the second assembly line weighing instrument (32) and supported by the supporting frames (41);

the pushing mechanism is arranged at the tail end of the input conveyor (21) on the rack (1), and comprises a first air cylinder (51) with a telescopic rod (55) extending and retracting direction perpendicular to the conveying direction of the conveying mechanism (2) and a pushing arm (52) vertically arranged at the tail end of the telescopic rod (55), wherein the pushing arm (52) is positioned on one side, close to the outside of the rack (1), of the first assembly line weighing instrument (31);

and blocking rods (6) are arranged on one sides of the first assembly line weighing instrument (31) and the second assembly line weighing instrument (32) close to the pushing mechanism.

2. A double-folding double-station weighing and filling machine as claimed in claim 1, wherein in the pushing mechanism, a slide block (53) is arranged below a connecting part (56) of the pushing arm (52) and the tail end of the telescopic rod (55), a slide rail (54) corresponding to the slide block (53) is arranged on the frame (1) on the side of the pushing mechanism facing the conveying mechanism (2), and the travelling direction of the slide block (53) on the slide rail (54) is parallel to the telescopic direction of the telescopic rod (55).

3. A double-folding double-station weighing and filling machine as claimed in claim 1 or 2, characterized in that the frame (1) is provided with a dividing rod (100) between the input conveyor (21) and the output conveyor (22), a section of the dividing rod (100) between the first flow line weighing instrument (31) and the second flow line weighing instrument (32) is replaced by a transfer roller (7), and the central axis of the transfer roller (7) is perpendicular to the telescopic direction of the telescopic rod (55).

4. A double-folding double-station weighing and filling machine as claimed in claim 3, wherein a telescopic guide mechanism (8) is respectively arranged on both sides of the input conveyor (21), the guide mechanism (8) comprises at least two internal thread pipes (81) vertically arranged on the frame (1) at equal intervals, a cantilever rod (82) vertically penetrating through the internal thread pipes (81) and extending above the input conveyor (21), a screw rod (83) screwed into the internal thread pipes (81) to fix the cantilever rod (82), a clamping piece (84) arranged at the tail end of the cantilever rod (82) above the input conveyor (21), and a guide rod (85) with the central axis parallel to the conveying direction of the input conveyor (21) after being clamped by the clamping piece (84).

5. A fold-back double-station weighing and filling machine according to claim 1 or 4, wherein the supporting frame (41) comprises a cantilever member arranged on the top of the weighing mechanism (3) and used for supporting the first filling port (42) or the second filling port (43), a screw-nut transmission mechanism arranged on the frame (1), a rotating handle (413) arranged on the outer side wall of the frame (1), a vertical conversion mechanism (414) arranged in the frame (1) and respectively connected with a rotating shaft (410) of the rotating handle (413) and a screw rod (418), a sleeve (415) sleeved with a nut (419) and fixedly connected with the cantilever member, a handle (416) arranged on the side wall of the sleeve (415), a limit screw (417) fixed on the rotating center of the handle (416), penetrating through the sleeve (415) and tightly abutting against the nut (419), the cantilever part is fixedly connected with a screw rod (418) and a nut (419) of a nut (419) transmission mechanism.

6. A double-folding double-station weighing and filling machine as claimed in claim 5, wherein the input conveyor (21), the output conveyor (22) and the conveying element (302) are all roller conveyors, the first driving device (23), the second driving device (24) and the third driving device (303) are all electric motors, the transmission mechanism comprises at least one pair of roller gears (16) arranged on one side of a roller close to the outside of the frame (1), a shaft lever gear (12) arranged at the tail end of a shaft lever (11) of each electric motor, and a chain connecting the roller gears (16) and the shaft lever gears (12).

7. A double-folding double-station weighing and filling machine as in claim 1 or 6, wherein a cover placing device (9) is arranged in the middle of the output conveyor (22).

8. A double-folding, double-station weighing and filling machine as in claim 7, wherein a capping device (10) is provided on the output conveyor (22) on the side of the capping device (9) adjacent to the output end.

9. A double-folding double-station weighing and filling machine as claimed in claim 7, further comprising an anti-dripping device (13) respectively arranged on the supporting frame (41) below the first filling port (42) and the second filling port (43), and comprising a second cylinder (131) horizontally arranged and a receiving tray (132) arranged at the tail end of the telescopic rod (55) of the second cylinder (131).

10. A double-folding double-station weighing and filling machine as claimed in claim 8, wherein limiting means (14) are provided respectively on the barrel inlet side of said first assembly line weighing instrument (31), the barrel inlet side of said cover placing means (9) and the barrel inlet side of said cover closing means (10).

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