Silkworm feed processing, feeding and conveying production line

Abstract

The utility model relates to the field of silkworm breeding equipment, in particular to a silkworm feed processing, feeding and conveying production line which comprises a feed processing, conveying and pouring working chamber and a feed feeding working chamber which are separated by a partition plate. A feed processing and manufacturing machine, a quantitative loading conveyor, a charging basket elevator, a transition conveyor and a charging basket dumping mechanism are arranged in the feed processing, conveying and dumping working chamber; a feed feeding machine is arranged in the feed feeding operation room; through cooperation of the feed processing and manufacturing machine, the quantitative loading conveyor, the charging basket elevator, the transition conveyor, the charging basket pouring mechanism and the feed feeding machine, automatic conveying and feeding of silkworm feed are basically achieved, and efficiency is effectively improved; meanwhile, the conveying and pouring working chamber and the feed feeding working chamber are arranged, the two chambers are separated through a partition plate and are input into the feed feeding machine for feeding operation through a material receiving hopper pipe, germs in the feed feeding working chamber are difficult to infect a feed barrel, and the situation that the germs are brought into feed production and other areas by the feed barrel is effectively relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of silkworm breeding equipment, and particularly relates to a production line for processing, feeding and conveying silkworm feed. Background Art

[0002] With the development of society, the breeding of mulberry silkworms has changed from small workshops to industrialized breeding, and tens of thousands of baskets of silkworms need to be fed every day; the production of silkworm feed is basically carried out by feed processing and manufacturing machines, and the processed silkworm feed is basically transported by feed hopper trucks, and the feed is put into the hopper by manually turning the feed hopper truck, which is difficult to meet the increasing demand for large-scale silkworm breeding; at the same time, when manually turning the hopper to put in the feed, the hopper often enters and exits the silkworm breeding room, which is easy to bring the inside of the silkworm breeding room into the feed production area or other areas, resulting in pollution. Therefore, how to design a production line and a conveying method for processing, feeding and conveying silkworm feed has become the focus of research by industry insiders. Content of the Utility Model

[0003] In order to solve the problems existing in the background art, the utility model provides the following technical solutions:

[0004] A production line for processing, feeding and conveying silkworm feed includes: a feed processing, conveying and tipping operation room and a feed feeding operation room separated by a partition board;

[0005] A feed processing and manufacturing machine, a quantitative loading conveyor, a bucket elevator, a transition conveyor and a bucket tipping mechanism are arranged in the feed processing, conveying and tipping operation room;

[0006] A feed feeding machine is arranged in the feed feeding operation room;

[0007] A receiving hopper pipe is arranged between the feed processing, conveying and tipping operation room and the feed feeding operation room to connect the tipping output end of the bucket tipping mechanism and the feed inlet end of the feed feeding machine;

[0008] The feed processing and manufacturing machine is used for processing and producing feed; a bucket for receiving the feed produced by the feed processing and manufacturing machine is arranged on the quantitative loading conveyor; the quantitative loading conveyor is used for quantitatively weighing and loading the bucket and conveying it; the bucket elevator is arranged at the discharge end of the quantitative loading conveyor to lift the output bucket onto the transition conveyor, and the transition conveyor conveys the bucket loaded with quantitative feed to the bucket tipping mechanism; the bucket tipping mechanism is used for tipping the bucket, and the feed is input into the feed feeding machine through the receiving hopper pipe; the feed feeding machine is used for feed feeding operation.

[0009] Further, the quantitative loading conveyor is a weighing conveyor; a partition is provided between the feed processing and manufacturing machine and the weighing conveyor to divide it into a feed processing area and a feed loading and conveying area; a partition is also provided between the weighing conveyor and the transition conveyor and the bucket elevator to divide it into a feed loading and conveying area, a feed lifting and feeding area, and a feed dumping area; the inlet end of the bucket elevator extends into the outlet end of the weighing conveyor arranged in the feed loading and conveying area; the inlet end of the transition conveyor extends into the outlet end of the bucket elevator arranged in the feed lifting and feeding area; the inlet end of the bucket dumping mechanism is docked to the outlet end of the transition conveyor.

[0010] Preferably, the weighing conveyor is an electronic scale conveyor.

[0011] Further, the quantitative loading conveyor is arranged below the feed processing and manufacturing machine, and the outlet of the feed processing and manufacturing machine outputs the falling material through a feed pipe, and a switching valve is arranged in the feed pipe.

[0012] Further, both the transition conveyor and the bucket dumping mechanism are arranged in the feed dumping area, and the bucket dumping mechanism is located above the feed feeding machine; one end of the receiving hopper pipe extends into the feed dumping area, and the other end extends into the feed feeding area.

[0013] Further, the bucket dumping mechanism includes:

[0014] A frame-structured rack;

[0015] A flipping bracket rotatably arranged on the rack, the flipping bracket includes a bottom frame, and vertical frames arranged at both ends of the bottom frame;

[0016] A flipping motor, the flipping motor is arranged on the rack, and the output shaft of the flipping motor is connected to the flipping bracket to provide the flipping power for dumping;

[0017] A chain conveyor unit correspondingly arranged inside the two vertical frames, and the chain conveyor unit is used to receive and convey the object to be flipped (the bucket);

[0018] And a locking unit, the locking unit is arranged on the flipping bracket, above the chain conveyor, and the locking unit is used to lock and fix the object to be flipped on the conveyor.

[0019] Further, the chain conveyor unit includes: a conveying frame, sprockets, a driving wheel, a chain, and a rotational power member; sprockets are arranged at both ends of the conveying frame, and at least one of the two sprockets is coaxially provided with a driving wheel; the chain is sleeved on the two sprockets of the conveying frame; the rotational power member is in transmission connection with the driving wheel to provide the power for the sprocket and chain to rotate and convey.

[0020] Furthermore, the two chain conveyor units share a rotary power component; the rotary power component includes a driving motor and a driving shaft, the driving shaft is rotatably arranged on the chassis through bearings and bearing seats; a transition pulley for transmission is arranged on the driving shaft; a driving pulley is arranged on the output shaft of the driving motor, the driving pulley is connected to a transition pulley on the driving shaft by a belt drive, and the transition pulleys at both ends of the driving shaft are respectively connected to a driving pulley in one of the two chain conveyor units by a belt drive.

[0021] Furthermore, a locking unit is arranged on the vertical frame above the outer sides of the two chain conveyor units. The locking unit includes a telescopic driving component, a guide shaft, a linear bearing, a push plate, a cushion beam and a positioning pin; the telescopic driving component is installed on the vertical frame, and the output end of the telescopic driving component is connected with the push plate; a guide shaft is arranged on the vertical frame outside the telescopic driving component, and the linear bearing on the push plate is sleeved on the guide shaft; a cushion beam is arranged at the bottom of the push plate close to the chain conveyor unit side, and a positioning pin is arranged on the cushion beam.

[0022] Furthermore, a front electric roller and a rear electric roller are respectively arranged at the front and rear ends of the frame along the conveying direction of the chain conveyor unit.

[0023] This application also provides a method for feeding and conveying silkworm feed, including the above-mentioned production line for feeding and conveying silkworm feed, and further including the following steps:

[0024] The feed is processed and produced by a feed processing and manufacturing machine;

[0025] The quantitative loading conveyor is used to judge and convey the quantitative loading of the feed bucket. If the feed loaded in the feed bucket meets the set requirements, the quantitative loading conveyor will convey the feed bucket to the feed bucket elevator at the end. If the feed loaded in the feed bucket does not meet the set requirements, the quantitative loading conveyor will convey the feed bucket to the receiving end below the feed processing and manufacturing machine for continuous loading;

[0026] The quantitatively loaded feed bucket is lifted and fed to the transition conveyor by the feed bucket elevator, and the transition conveyor conveys the feed bucket with quantitatively loaded feed to the feed bucket tipping mechanism;

[0027] The feed bucket is tipped and emptied by the feed bucket tipping mechanism, and the feed in the feed bucket is emptied into the receiving hopper pipe to be input into the feed feeding machine;

[0028] The feed feeding operation is carried out by the feed feeding machine.

[0029] Beneficial effects

[0030] The feeding material conveying and dosing production line for silkworm feed provided by the utility model comprises: a feed processing, conveying and tipping operation room and a feed feeding operation room which are separated by a partition board; a feed processing and manufacturing machine, a quantitative loading conveyor, a bucket elevator, a transition conveyor and a bucket tipping mechanism are arranged in the feed processing, conveying and tipping operation room; a feed feeding machine is arranged in the feed feeding operation room; through the cooperation of the feed processing and manufacturing machine, the quantitative loading conveyor, the bucket elevator, the transition conveyor, the bucket tipping mechanism and the feed feeding machine, the automatic conveying and dosing of silkworm feed are basically realized, and the efficiency is effectively improved; at the same time, the conveying and tipping operation room and the feed feeding operation room are set, the two rooms are separated by a partition board, and are input into the feed feeding operation of the feed feeding machine through a receiving hopper pipe, and it is difficult for the germs in the feed feeding operation room to infect the feed bucket, effectively reducing the germs brought into the feed production and other areas by the feed bucket; in addition, since the feed bucket does not contact the silkworm breeding room, the cleaning time can be reduced and used for a long time, further improving the efficiency and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic structural diagram of a feeding material conveying and dosing production line for silkworm feed in this embodiment;

[0033] Figure 2 is Figure 1 a schematic structural diagram of the bucket tipping mechanism in it;

[0034] Figure 3 is Figure 2 a perspective structural diagram of the tipping bracket and the chain conveyor unit in it;

[0035] Figure 4 is Figure 2 another perspective structural diagram of the tipping bracket and the chain conveyor unit in it;

[0036] Figure 5 It is a flowchart of a feeding material conveying and dosing method for silkworm feed in this embodiment;

[0037] Among them, 10 is a feed processing and manufacturing machine, 20 is a quantitative loading conveyor, 30 is a bucket elevator, 40 is a transition conveyor, 50 is a bucket tipping mechanism, 60 is a feed feeding machine, 70 is a receiving hopper pipe, 80 is a bucket, and 90 is a blanking pipe; A is a feed processing area, B is a feed loading and conveying area, C is a feed lifting and feeding area, D is a feed tipping area, and E is a feed feeding area; 1 is a frame, 2 is a flipping bracket, 3 is a chain conveyor unit, 4 is a flipping motor, 5 is a locking unit, 6 is a front electric roller, and 7 is a rear electric roller. Detailed implementation manner

[0038] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0039] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0041] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which this application can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.

[0042] This embodiment is written in a progressive manner.

[0043] Refer to Figures 1-5As shown in the figure, a feeding and conveying production line for silkworm feed processing includes a feed processing, conveying, and tipping operation room and a feed feeding operation room separated by a partition board;

[0044] In the feed processing, conveying, and tipping operation room, there are arranged a feed processing and manufacturing machine 10, a quantitative loading conveyor 20, a bucket hoist 30, a transition conveyor 40, and a bucket tipping mechanism 50;

[0045] In the feed feeding operation room, there is arranged a feed feeding machine 60;

[0046] Between the feed processing, conveying, and tipping operation room and the feed feeding operation room, there is a receiving hopper pipe 70 connecting the tipping output end of the bucket tipping mechanism and the feeding inlet end of the feed feeding machine;

[0047] The feed processing and manufacturing machine is used for the processing and production of feed; on the quantitative loading conveyor, there is arranged a bucket 80 (feed bucket) that receives the feed output by the feed processing and manufacturing machine; the quantitative loading conveyor is used for the quantitative weighing and loading of the bucket and its conveying; the bucket hoist is arranged at the discharge end of the quantitative loading conveyor to lift and load the output bucket onto the transition conveyor, and the transition conveyor conveys the bucket filled with quantitatively loaded feed to the bucket tipping mechanism; the bucket tipping mechanism is used for tipping the bucket, and the feed is input into the feed feeding machine through the receiving hopper pipe; the feed feeding machine is used for the feed feeding operation.

[0048] Through the cooperation of the feed processing and manufacturing machine, the quantitative loading conveyor, the bucket hoist, the transition conveyor, the bucket tipping mechanism, and the feed feeding machine, this application basically realizes the automatic feeding and conveying of silkworm feed, effectively improving the efficiency; at the same time, by setting the conveying, tipping operation room and the feed feeding operation room, the two rooms are separated by a partition board, and the feed is input into the feed feeding machine through the receiving hopper pipe for feeding operation. It is difficult for the germs in the feed feeding operation room to infect the feed bucket, effectively reducing the risk of the feed bucket bringing germs into the feed production and other areas; in addition, since the feed bucket does not come into contact with the silkworm breeding room, it can be used for a longer time without frequent cleaning, further improving the efficiency and saving costs.

[0049] Further, the quantitative loading conveyor is a weighing conveyor; a partition board is provided between the feed processing and manufacturing machine and the weighing conveyor to separate them into a feed processing area A and a feed loading and conveying area B; a partition board is also provided between the weighing conveyor and the transition conveyor and the bucket hoist to separate them into a feed loading and conveying area, a feed lifting and loading area C, and a feed tipping area D; the inlet end of the bucket hoist extends into and is arranged at the discharge port end of the weighing conveyor in the feed loading and conveying area; the inlet end of the transition conveyor extends into and is arranged at the outlet end of the bucket hoist in the feed lifting and loading area; the inlet end of the bucket tipping mechanism is connected to the outlet end of the transition conveyor.

[0050] Preferably, the weighing conveyor is an electronic scale conveyor.

[0051] Further, the quantitative loading conveyor is arranged below the feed processing and manufacturing machine, and the discharge port of the feed processing and manufacturing machine outputs the falling material through the arranged material falling pipe 90, and a switching valve is arranged in the material falling pipe.

[0052] Further, both the transition conveyor and the bucket tipping mechanism are arranged in the feed tipping area, and the bucket tipping mechanism is located above the feed feeding machine; one end of the receiving hopper pipe extends into the feed tipping area, and the other end of the receiving hopper pipe extends into the feed feeding area E; the feed feeding area is the placement area where the feed feeding machine is located.

[0053] Further, the bucket tipping mechanism includes:

[0054] A frame-structured rack 1;

[0055] A tipping bracket 2 rotatably arranged on the rack, the tipping bracket includes a bottom frame, and vertical frames arranged at both ends of the bottom frame;

[0056] A tipping motor 4, the tipping motor is arranged on the rack, and the output shaft of the tipping motor is connected to the tipping bracket to provide the tipping and turning power;

[0057] A chain conveyor unit correspondingly arranged inside the two vertical frames, and the chain conveyor unit is used for receiving and conveying the object to be tipped (bucket);

[0058] And a locking unit 5, the locking unit is arranged on the tipping bracket, above the chain conveyor, and the locking unit is used for locking and fixing the object to be tipped on the conveyor.

[0059] Further, the chain conveyor unit includes: a conveying frame, a sprocket, a driving wheel, a chain and a rotating power member; sprockets are arranged at both ends of the conveying frame, and at least one of the two sprockets is coaxially provided with a driving wheel; the chain is sleeved on the two sprockets of the conveying frame; the rotating power member is in transmission connection with the driving wheel to provide the power for the sprocket and chain to rotate and convey.

[0060] Further, the two chain conveyor units share a rotating power member; the rotating power member includes a driving motor and a driving shaft, the driving shaft is rotatably arranged on the bottom frame through a bearing and a bearing seat; a transition wheel for transmission is arranged on the driving shaft; a driving wheel is arranged on the output shaft of the driving motor, the driving wheel is in belt transmission connection with a transition wheel on the driving shaft, and the transition wheels at both ends of the driving shaft are respectively in belt transmission connection with a driving wheel in one of the two chain conveyor units.

[0061] Further, a locking unit is arranged on the vertical frame above the outer sides of the two chain conveyor units. The locking unit includes a telescopic driving member, a guide shaft, a linear bearing, a push plate, a cushion beam and a positioning pin. The telescopic driving member is installed on the vertical frame, and the output end of the telescopic driving member is connected with the push plate. A guide shaft is arranged on the vertical frame outside the telescopic driving member, and the linear bearing on the push plate is sleeved on the guide shaft. A cushion beam is arranged at the bottom of the push plate close to the chain conveyor unit side, and a positioning pin is arranged on the cushion beam.

[0062] Further, a front electric roller 6 and a rear electric roller 7 are respectively arranged at the front and rear ends of the machine frame along the conveying direction of the chain conveyor unit.

[0063] The present application also provides a method for feeding and conveying silkworm feed, including the above-mentioned production line for feeding and conveying silkworm feed, and further including the following steps:

[0064] Carry out the processing and production of feed through a feed processing and manufacturing machine;

[0065] Carry out the quantitative loading judgment and conveying of the feed bucket through a quantitative loading conveyor. If the feed loaded in the feed bucket meets the set requirements, the quantitative loading conveyor will convey the feed bucket to the feed bucket elevator at the end. If the feed loaded in the feed bucket does not meet the set requirements, the quantitative loading conveyor will convey the feed bucket to the receiving end under the feed processing and manufacturing machine for continuous loading;

[0066] Lift and feed the quantitatively loaded feed bucket to a transition conveyor through a feed bucket elevator, and the transition conveyor conveys the feed bucket with quantitatively loaded feed to a feed bucket pouring mechanism;

[0067] Carry out the inversion and pouring of the feed bucket through the feed bucket pouring mechanism, and pour the feed in the feed bucket into a receiving hopper pipe to be input into a feed feeding machine;

[0068] Carry out the feed feeding operation through a feed feeding machine.

[0069] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A feeding material conveying and production line for silkworm feed processing, characterized in that, Comprising: A feed processing, conveying and tipping operation room and a feed feeding operation room separated by a partition board; In the feed processing, conveying and tipping operation room, there are arranged a feed processing and manufacturing machine, a quantitative loading conveyor, a bucket elevator, a transition conveyor and a bucket tipping mechanism; The feed feeding operation room is provided with a feed feeding machine; A receiving hopper pipe is arranged between the feed processing, conveying and tipping operation room and the feed feeding operation room to connect the tipping output end of the bucket tipping mechanism and the feed inlet end of the feed feeding machine; The feed processing and manufacturing machine is used for the processing and production of feed; a bucket for receiving the feed produced and output by the feed processing and manufacturing machine is arranged on the quantitative loading conveyor; the quantitative loading conveyor is used for the quantitative weighing and loading of the bucket and conveying; the bucket elevator is arranged at the discharge end of the quantitative loading conveyor to lift and feed the output bucket to the transition conveyor, and the transition conveyor conveys the bucket loaded with quantitative feed to the bucket tipping mechanism; the bucket tipping mechanism is used for tipping the bucket, and the feed is input into the feed feeding machine through the receiving hopper pipe; the feed feeding machine is used for the feed feeding operation.

2. The silkworm feed processing and feeding conveyor production line according to claim 1, wherein The quantitative loading conveyor is a weighing conveyor; a partition board is arranged between the feed processing and manufacturing machine and the weighing conveyor to separate them into a feed processing area and a feed loading and conveying area; a partition board is also arranged between the weighing conveyor and the transition conveyor and the bucket elevator to separate them into a feed loading and conveying area, a feed lifting and feeding area and a feed tipping area; the inlet end of the bucket elevator extends into the discharge port end of the weighing conveyor arranged in the feed loading and conveying area; the inlet end of the transition conveyor extends into the outlet end of the bucket elevator arranged in the feed lifting and feeding area; the inlet end of the bucket tipping mechanism is docked with the outlet end of the transition conveyor.

3. The feeding and conveying production line for processing silkworm feed according to claim 2, wherein The quantitative loading conveyor is arranged below the feed processing and manufacturing machine, and the discharge port of the feed processing and manufacturing machine outputs the falling material through a set of material dropping pipe, and a switching valve is arranged in the material dropping pipe.

4. The silkworm feed processing and feeding conveyor production line according to claim 2, characterized in that, Both the transition conveyor and the bucket tipping mechanism are arranged in the feed tipping area, and the bucket tipping mechanism is located above the feed feeding machine; one end of the receiving hopper pipe extends into the feed tipping area, and the other end of the receiving hopper pipe extends into the feed feeding area.

5. The silkworm feed processing feeding and conveying production line according to any one of claims 1-4, characterized in that, The bucket tipping mechanism includes: A frame-structured rack; A tipping bracket rotatably arranged on the rack, the tipping bracket includes a bottom frame, and vertical frames arranged at both ends of the bottom frame; A tipping motor, the tipping motor is arranged on the rack, and the output shaft of the tipping motor is connected to the tipping bracket to provide the tipping and turning power; A chain conveyor unit correspondingly arranged inside the two vertical frames, and the chain conveyor unit is used for receiving and conveying the object to be tipped; And a locking unit, the locking unit is arranged on the tipping bracket, above the chain conveyor, and the locking unit is used for locking and fixing the object to be tipped on the conveyor.

6. The silkworm feed processing and feeding conveyor production line according to claim 5, characterized in that, The chain conveyor unit includes: a conveying frame, sprockets, driving wheels, a chain and a rotating power member; sprockets are arranged at both ends of the conveying frame, and at least one of the two sprockets is coaxially provided with a driving wheel; the chain is sleeved on the two sprockets of the conveying frame; the rotating power member is in transmission connection with the driving wheel to provide the power for the sprockets and the chain to rotate and convey.

7. The silkworm feed processing feeding and conveying production line according to claim 6, characterized in that, Two chain conveyor units share a rotating power component; the rotating power component includes a driving motor and a driving shaft, and the driving shaft is rotatably arranged on the chassis through bearings and bearing seats; a transition wheel for transmission is provided on the driving shaft; a driving wheel is provided on the output shaft of the driving motor, and the driving wheel is belt-drivenly connected to a transition wheel on the driving shaft, and the transition wheels at both ends of the driving shaft are respectively belt-drivenly connected to a driving wheel in the two chain conveyor units.

8. The silkworm feed processing feeding and conveying production line according to any one of claims 1-4, 6-7, characterized in that Locking units are arranged on the vertical frames above the outer sides of the two chain conveyor units. The locking units include telescopic driving components, guide shafts, linear bearings, push plates, cushion beams and positioning pins; the telescopic driving components are installed on the vertical frames, and the output ends of the telescopic driving components are connected with push plates; guide shafts are arranged on the vertical frames outside the telescopic driving components, and the linear bearings on the push plates are sleeved on the guide shafts; cushion beams are arranged at the bottoms of the push plates close to the chain conveyor units, and positioning pins are arranged on the cushion beams.

9. The silkworm feed processing feeding and conveying production line according to claim 5, characterized in that, Front electric rollers and rear electric rollers are respectively arranged at the front and rear ends of the frame along the conveying direction of the chain conveyor units.

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