CN111689176B - Fiber feeder for concrete mixing station and feeding method - Google Patents

Abstract

The invention discloses a fiber feeder for a concrete mixing plant and a feeding method, wherein the fiber feeder comprises a rack, a belt conveyor, a baffle plate, a sliding positioning mechanism and a discharging mechanism, the baffle plate and the conveyor belt form a storage and moving space of fiber packages, the sliding positioning mechanism is used for fixing a second row of fiber packages to prevent the fiber packages from toppling or sliding when discharging, and the discharging mechanism is used for releasing the fiber packages stored in the baffle plate into the mixing plant one by one. The invention can replace manual automatic quantitative fiber feeding to the mixing plant, greatly improves the operation environment of workers, improves the working efficiency and the production quality of fiber concrete, and ensures the occupational health.

Description

Fiber feeder for concrete mixing station and feeding method

Technical Field

The invention relates to the technical field of concrete preparation, in particular to a fiber feeder and a feeding method for a concrete mixing plant.

Background

As a novel building material, the fiber concrete not only has various advantages of the traditional concrete, but also has obvious improvement on various performances such as tensile property, bending resistance, crack resistance, high temperature resistance, durability and the like, and has been gradually approved and applied in various industries, particularly the building industry due to the obvious advantages of the fiber concrete compared with the traditional concrete. The fiber concrete is a cement-based composite material which is composed of cement paste, mortar or concrete as a base material and fiber as a reinforcing material, and the tensile strength, the bending strength, the impact strength, the elongation and the toughness of the concrete are improved due to the large tensile strength and the large elongation of the fiber.

When the existing concrete mixing plant carries out fiber concrete production, the mode of manual adding is adopted for adding fibers. For example, a professional is disposed near each mixer, and when concrete is mixed, the professional puts fibers on an inclined belt of a mixer middle bucket, and the fibers and concrete aggregate are put into the mixer together and mixed. The manual feeding of the fibers has the disadvantages of high labor intensity and uncontrollable addition amount, so that the quality of concrete is reduced, and the fibers are easy to fly around, thereby affecting the operating environment and damaging the body health of workers. Therefore, the development of a feeder capable of automatically feeding fibers is a technical problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In order to solve the technical problems, the invention provides the fiber feeder for the concrete mixing plant and the feeding method, which replace manpower, automatically and quantitatively feed fibers into the mixer, greatly improve the operating environment, ensure the occupational health and further improve the production quality of fiber concrete.

The technical scheme adopted by the invention is as follows:

a fiber feeder for a concrete batching plant, comprising:

the frame is used for supporting the feeder and installing each part;

the belt conveyor is obliquely arranged at the top of the rack from back to front and is used for supporting and conveying the fiber package;

the material blocking plates are vertically arranged on two sides of the belt conveyor and form a storage and moving space for the fiber bag together with the belt conveyor; the space can store a plurality of rows of fiber bags;

the sliding positioning mechanism is used for fixing the second row of fiber packages to prevent the second row of fiber packages from toppling or sliding during material placing, and comprises a sliding positioning plate, a positioning rod, a positioning cylinder and a synchronizing mechanism, wherein the sliding positioning plate is arranged at the top of the material baffle plate, can be driven by the synchronizing mechanism to synchronously slide to the upper side of the first row of fiber packages from the upper side of the second row of fiber packages with the conveying belt, and can also be driven by the synchronizing mechanism to slide to the upper side of the second row of fiber packages from the upper side of the first row of fiber packages when the conveying belt does; the positioning cylinder is vertically arranged on the sliding positioning plate, a cylinder piston rod is coaxially connected with the positioning rod, and the positioning rod can penetrate through the sliding positioning plate to be inserted into a row of fiber packages below under the driving of the positioning cylinder;

the discharging mechanism is used for releasing the fiber packages stored in the material baffle plate into the mixing station one by one and comprises a discharging cylinder, a discharging plate and a discharging groove, the middle part of the discharging groove is rotatably arranged at the rear end of a rack of the belt conveyor through a rotating shaft, the discharging plate is slidably inserted into the discharging groove, when the discharging groove rotates to a vertical state, the discharging plate moves upwards, and the opening at the rear side of the material baffle plate is closed to stop the slippage of the fiber packages; when the discharging groove rotates to an inclined state, the discharging plates move downwards to release a row of fiber packages supported on the discharging plates one by one; blowing cylinder one end is fixed in the frame rear side, and the cylinder piston rod of the other end is articulated with the blowing groove, and blowing cylinder drive blowing groove revolutes the rotation of axes.

Further, each column of fiber packages is overlapped with 2N packages of fibers, wherein N is a natural number which is more than or equal to 1.

Further, the synchronous mechanism comprises a positioning plate rack, a positioning plate gear, a first rotating shaft, a positioning plate driving wheel, a synchronous belt, a synchronous wheel, a conveying belt driving roller, a second rotating shaft, a speed reducer and a conveying belt driving motor; the synchronous wheel and the conveying belt driving roller are coaxially sleeved on the second rotating shaft, and the conveying belt driving motor drives the second rotating shaft to rotate through the speed reducer; the first rotating shaft is rotatably installed on the outer side of the material baffle plate, the positioning plate gear and the positioning plate driving wheel are coaxially sleeved on the first rotating shaft, the positioning plate driving wheel is connected with the synchronizing wheel through a synchronous belt, the positioning plate rack is fixed on the lower side surface of the sliding positioning plate, the positioning plate rack and the positioning plate gear form a gear-rack transmission pair, and the conveying belt driving motor drives the sliding positioning plate to move forwards synchronously with the conveying belt.

Further, the belt driving roller is mounted on the belt driving roller through a one-way bearing for restricting the reverse rotation of the belt.

Furthermore, the synchronous belt is a chain or a belt, and the positioning plate driving wheel and the synchronous wheel are chain wheels or belt wheels.

Further, the inclination angle of the belt conveyor is 10-15 degrees.

Furthermore, the material discharging plate is connected with the material discharging groove through a feed screw nut mechanism, and the feed screw nut mechanism comprises a feed screw, a nut and a feed screw driving motor; the screw rod driving motor is fixedly installed at the lower end of the discharging groove, the nut is fixed at the lower end of the discharging plate, one end of the screw rod penetrates through the nut in a spiral mode, the other end of the screw rod is fixedly connected with the motor shaft in a coaxial mode, and the screw rod driving motor drives the screw rod to rotate in the nut so as to drive the discharging plate to slide up and down in the discharging groove.

Furthermore, a front locating plate limit switch and a rear locating plate limit switch for limiting the sliding distance of the sliding locating plate are arranged on the material baffle plate, an upper locating rod limit switch and a lower locating rod limit switch for limiting the telescopic distance of the locating rod are arranged on the locating cylinder, an upper discharging plate limit switch for limiting the upward moving position of the discharging plate is arranged on the discharging tank, an opening door limit switch and a closing door limit switch of the discharging cylinder for limiting the closing or opening of the discharging plate are arranged on the discharging cylinder, discharging plate sensors which are arranged in one-to-one correspondence with the fiber packages and used for detecting the downward moving position of the discharging plate are arranged on the discharging tank, and a material sensor for detecting whether the fiber packages are located in a first row is arranged on the discharging plate; the limit switch and the sensor are connected with a PLC (programmable logic controller), and the PLC is also respectively connected with a positioning cylinder, a discharging cylinder, a conveying belt driving motor and a screw rod driving motor; and a counter is arranged in the PLC, and the counter is used for counting the times of triggering the discharging plate sensor.

The PLC drives the positioning cylinder, the discharging cylinder, the conveying belt driving motor and the screw rod driving motor to correspondingly act according to the received mixer batching signals, so that the functions of charging and automatic discharging of fiber packages are realized.

An automatic discharging method for the fiber feeder comprises the following steps:

1) receiving a mixer batching signal by a PLC controller;

2) the method comprises the steps that a PLC detects whether a fiber feeder is in an initial state, wherein the initial state is that a sliding positioning plate is in a front limit position, a positioning rod is in an upper limit position, a discharging plate is in the upper limit position, a material sensor detects that materials are available and a discharging cylinder is in a door closing limit position;

3) the PLC controller controls the conveyer belt driving motor to rotate reversely so that the sliding positioning plate moves to the rear limiting position;

4) the PLC controller controls a piston rod of the positioning air cylinder to extend out to enable the positioning rod to penetrate into a row of fiber packages below the positioning plate, and the positioning rod is positioned at the lower limit position;

5) the PLC controller controls a piston rod of a discharging cylinder to retract so that the discharging chute rotates outwards to open a discharging plate, a first row of fiber packages are supported on the discharging plate, and the discharging cylinder is in the step of limiting opening of the door;

6) the PLC controls the screw rod to drive the motor to rotate reversely so that the discharging plate moves downwards, the first fiber package falls, the discharging plate triggers the first discharging plate sensor, and the counter starts counting;

7) the PLC controller controls the screw rod driving motor to continuously rotate reversely to enable the discharging plate to move downwards, the second package fiber package falls, the discharging plate triggers a second discharging plate sensor, and the counter counts up;

8) when the accumulated value of the counter reaches a set value, the PLC controller controls the screw rod driving motor to stop rotating, and the counter is reset;

9) the PLC receives the batching signal of the stirrer again;

10) the PLC controls the screw rod driving motor to rotate reversely to enable the discharging plates to move downwards, the last fiber package falls, the discharging plates trigger the last discharging plate sensor, the counter is reset, and the screw rod driving motor rotates forwards to enable the discharging plates to move upwards to be limited and return to the initial position;

11) the PLC controller controls a discharging cylinder piston rod to extend out to enable a discharging groove to rotate a discharging plate inwards to be closed, and a discharging cylinder is positioned at a door closing limit and returns to an initial position;

12) the PLC controller controls a piston rod of the positioning cylinder to retract so that the positioning rod is drawn out of the fiber package, is positioned at an upper limit position and returns to an initial position;

13) and the PLC controls the conveyer belt driving motor to rotate forwards to enable the sliding positioning plate and the conveyer belt to move forwards synchronously, the second row of fiber packages move to the first row of fiber packages, and the sliding positioning plate is in front limit and returns to the initial position.

The invention has the beneficial effects that:

1. the fiber feeding device can replace manual operation to automatically feed fibers into the mixing station, greatly improves the operation environment of workers, and guarantees the occupational health.

2. The quantitative automatic feeding device can realize the quantitative automatic feeding of the fibers, is high in working efficiency, and ensures the production quality of concrete.

3. The fiber feeder is convenient to operate, stable in performance and high in reliability.

Drawings

Fig. 1 is a schematic configuration diagram showing a state in which a fiber feeder according to embodiment 1 of the present invention is opened.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic structural view of a slide positioning mechanism of the fiber feeder of embodiment 1 of the present invention.

Fig. 4 is a schematic structural view of a discharge mechanism of the fiber feeder of embodiment 1 of the invention.

Fig. 5 is an automatic loading flow chart of the fiber feeding machine according to embodiment 1 of the present invention.

Fig. 6 is a first flow chart of automatic discharging of the fiber feeder according to embodiment 1 of the present invention.

Fig. 7 is a second automatic discharge flow chart of the fiber feeder according to embodiment 1 of the present invention.

Fig. 8 is a third automatic discharging flow chart of the fiber feeder of embodiment 1 of the invention.

Detailed Description

In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.

Example 1

Referring to fig. 1 to 4, the present embodiment provides a fiber feeder for a concrete mixing plant, including: the device comprises a frame 10, a belt conveyor 20, a material baffle 30, a sliding positioning mechanism 40 and a discharging mechanism 50.

The frame 10 is a rectangular frame formed by welding profile steels and used for supporting the feeder and installing various parts, and comprises four supporting legs for supporting and a horizontal installation surface supported by the four supporting legs.

The belt conveyor mainly comprises a conveying belt 21, a conveying belt driving roller 22, a driven roller 23, a conveying belt driving motor 24, a speed reducer 25 and a frame 26. The belt conveyor 20 is obliquely arranged on the mounting surface at the top of the frame 10 from back to front through the frame 26, the inclination angle is about 10-15 degrees, and by adopting the design scheme, on one hand, the fiber bag can be inclined to the front side along with the transmission surface of the conveying belt during loading and moving, and the fiber bag is prevented from falling to the rear side; on the other hand, the first row of fiber packages can be tightly leaned on the material discharging plate, and when the material discharging plate is opened outwards, the first row of fiber packages are inclined along with the material discharging plate and supported on the material discharging plate to wait for discharging.

The frame 26 extends lengthwise at both ends. The driven roller 23 is rotatably mounted at the rear end of the frame 26, the second rotating shaft 221 is rotatably mounted at the front end of the frame 26 through a bearing, the belt driving roller 22 is sleeved on the second rotating shaft 221, and a one-way clutch 222 is mounted between one end of the belt driving roller 22 and the second rotating shaft 221. The one-way clutch 222 is conventional and functions to allow the belt drive roller 22 to rotate in only one direction, locking in the reverse direction. In the present embodiment, the belt driving roller 22 can rotate only in the clockwise direction, as viewed from the front in fig. 1, and is locked counterclockwise. The other end of the second rotating shaft 221 extends out of the side surface of the frame 26 and is connected with a speed reducer 25, and the speed reducer 25 is driven by a conveyor belt driving motor 24. The belt driving motor 24 drives the belt driving roller 22 to rotate through the speed reducer 25, and drives the belt 21 to reciprocate clockwise between the belt driving roller 22 and the driven roller 23.

The material baffle plates 30 are two in number, are vertically arranged on the machine frames 26 on two sides of the conveying belt 21, the front end faces of the material baffle plates extend to the front end of the axis of the conveying belt driving roller 22 by about one third of the width of the fiber bag, the roller of the conveying belt driving roller 22 is preferably smaller than 110mm, and therefore the first row of fiber bags are supported on one hand and the fiber bags are not easy to block during discharging on the other hand. The two material blocking plates 30 and the conveying belt 21 form a storage and moving space of the fiber bag 1; a plurality of rows of fiber bags can be stored in the space, the front side, the rear side and the top of the space are all of an open structure, the front side is provided with a discharge hole, and a row of fiber bags close to the discharge hole is a first row of fiber bags. For example, in this embodiment, nine rows of fiber bales may be placed, with 6 bales of fiber being stacked in each row. In other embodiments, the storage quantity of the fiber bags is selected according to actual needs, and the sizes of the load and the material blocking plate of the belt conveyor are designed in a matching way. The existing concrete fiber generally needs to add two bags of fiber per cubic concrete, wherein a single bag of fiber has the weight of 0.9kg and the length and height of 295 x 110 mm. Therefore, the number of fiber packages in each row is designed to be even, for example, each row of fiber packages is designed to be 6 packages in the embodiment, so that the control flow is simplified when automatic feeding is carried out conveniently. The length of conveyer belt 21 is 5 ~ 8 meters, and the width is 300mm, and the height of striker plate 30 is 660 mm. The distance between the two material retaining plates is slightly larger than 300mm, and a moving gap is reserved between the two material retaining plates and the conveying belt and the fiber bag. The striker plate 30 can be made of a hard plastic plate or a steel plate and is fixed on the frame 26 through screws, so that the striker plate is convenient to maintain and replace.

The slide positioning mechanism 40 includes a slide positioning plate 41, a positioning rod 42, a positioning cylinder 43, and a synchronization mechanism 44. The synchronizing mechanism 44 is composed of a positioning plate rack 441, a positioning plate gear 442, a first rotating shaft 443, a positioning plate driving wheel 444, a synchronizing belt 445, a synchronizing wheel 446, a conveyor belt driving roller 22, a second rotating shaft 221, a speed reducer 25 and a conveyor belt driving motor 24. The downside of slip locating plate 41 is equipped with the spout 411 with striker plate 30 thickness adaptation, and slip locating plate 41 locates the top of striker plate 30 through two spout 411 slidable, and the width of slip locating plate 41 approximately equals the width of fibre package, length and striker plate adaptation, and striker plate 30 is extended to one side of locating plate 41 length direction, and the downside of extending the end is equipped with locating plate rack 441. First pivot 443 passes through the bearing rotatable installation in the outside of striker plate 30, and coaxial suit is on first pivot 443 to locating plate gear 442 and locating plate drive wheel 444, and locating plate drive wheel 444 is located the outside of locating plate gear 442, and both are all prescribed a limit to the relative rotation with first pivot through key and keyway. Positioning plate gear 442 is in meshed connection with positioning plate rack 441 to form a gear-rack transmission pair. The synchronizing wheel 446 is sleeved on the second rotating shaft 221 and located between the rack 26 and the speed reducer 25, and the synchronizing wheel 446 and the second rotating shaft 221 are matched with each other through keys and key grooves to limit relative rotation. In the present embodiment, the timing wheel 446 and the positioning plate driving wheel 444 are timing pulleys having the same outer diameter and are connected by a timing belt 445. The synchronous belt transmission has accurate transmission ratio, no slip, stable transmission and low noise, and can obtain constant speed ratio. The positioning cylinder 43 is vertically arranged above the sliding positioning plate 41 through a cylinder bracket 431, and the positioning rod 42 is coaxially fixed at the lower end of the cylinder piston rod. The lower end of the positioning rod 42 is provided with a diamond-shaped tip, the diameter of the positioning rod 42 is preferably 6-8 mm, and the positioning rod within the diameter range can easily penetrate into the central shaft of a row of fibers (6-in-one row) below. The positioning rod 42 and the cylinder piston rod can be detachably connected through a bolt, so that the positioning rod is convenient to replace and maintain.

When the conveyor belt driving motor 24 drives the second rotating shaft 221 to rotate clockwise through the speed reducer 25, the conveyor belt driving roller 22 drives the conveyor belt 21 to move forward from the back; meanwhile, a positioning plate driving wheel 444 is driven to synchronously rotate through a synchronizing wheel 446 and a synchronizing belt 445, the positioning plate driving wheel 444 drives a first rotating shaft 443 to rotate, the first rotating shaft 443 drives a positioning plate gear 442 to rotate, the positioning plate gear 442 drives a positioning plate rack 441 to drive a sliding positioning plate 41 to move forwards, and by designing the tooth pitch and the modulus of the positioning plate rack 441 and the positioning plate gear 442, the linear speed of the positioning plate rack 441 is equal to the moving speed of the conveying belt 21, so that the fiber package is guaranteed to be stable in the moving process; when the conveyor belt driving motor 24 drives the second rotating shaft 221 to rotate anticlockwise through the speed reducer 25, the conveyor belt driving roller 22 does not rotate under the action of the one-way clutch 222, and the conveyor belt 21 is driven to keep still; synchronous wheel 446 and synchronous belt 445 drive positioning plate driving wheel 444 to synchronously and reversely rotate, positioning plate driving wheel 444 drives first rotating shaft 443 to rotate, first rotating shaft 443 drives positioning plate gear 442 to reversely rotate, and positioning plate gear 442 drives positioning plate rack 441 to drive sliding positioning plate 41 to move backwards.

The discharging mechanism 50 comprises a discharging cylinder 53, a discharging plate 52, a discharging groove 51 and a screw and nut mechanism 54. The discharging groove is a rectangular frame made of section steel, sliding grooves extending along the length direction are formed in two opposite side faces of the long side of the rectangular frame, and the discharging plate 52 is flat and is inserted into the sliding grooves. The feed screw nut mechanism 54 includes a feed screw 541, a first transmission nut 542, a second transmission nut 543, and a feed screw drive motor 544. The screw rod driving motor 544 is fixedly installed at the lower end of the discharging groove 51, the first transmission nut 542 is fixed at the lower end of the bottom of the discharging groove 51, the second transmission nut 543 is fixed at the lower end of the bottom of the discharging plate 52, one end of the screw rod 541 spirally penetrates through the first transmission nut 542 and the second transmission nut 543, and the other end of the screw rod 541 is coaxially and fixedly connected with a motor shaft of the screw rod driving motor 544. The screw rod driving motor 544 drives the screw rod 541 to rotate in the nut, so as to drive the discharging plate 52 to slide up and down in the discharging groove 51. The middle part of the discharging groove is rotatably arranged at the rear end of the frame 26 through a rotating shaft 511. One end of a discharging cylinder 53 is fixed on the rear side of the rack 10, a cylinder piston rod at the other end is hinged with the discharging groove 51, the discharging cylinder 53 drives the discharging groove 51 to rotate around a rotating shaft 511, when the discharging groove 51 rotates to a vertical state, a discharging plate 52 moves upwards to the uppermost part of the discharging groove, and the opening of the rear side of the material baffle plate 30 is closed to block the slippage of the first row of fiber bales; when the discharging chute 51 is rotated to an inclined state, preferably, the discharging plate is inclined by 135 degrees, and the first row of fiber packages are inclined along with the discharging plate 52 and are supported on the discharging plate 52 one by one to wait for discharging.

In this embodiment, the striker plate 30 is provided with a positioning plate front limit switch 101 and a positioning plate rear limit switch 102 for limiting the sliding distance of the sliding positioning plate 41, the front limit switch 101 is triggered when the sliding positioning plate moves backward to a position right above the second row of fiber bales, and the rear limit switch 102 is triggered when the sliding positioning plate moves forward to a position right above the first row of fiber bales. The positioning cylinder 43 is provided with a positioning-rod upper limit switch 104 and a positioning-rod lower limit switch 103 for limiting the extension distance of the positioning rod 42, the positioning-rod upper limit switch 104 is triggered when the positioning rod 42 moves upward and is completely separated from the fiber package, and the positioning-rod lower limit switch 103 is triggered when the positioning rod 42 moves downward and is inserted into a row of fiber packages. The discharging groove 51 is provided with a discharging plate upper limit switch 105 for limiting the upward moving position of the discharging plate 52, and when the discharging plate 52 moves upward to the top of the discharging groove 51, the discharging plate upper limit switch 105 is triggered. The emptying cylinder 53 is provided with an emptying cylinder door opening limit switch 106 and an emptying cylinder door closing limit switch 107 which are used for limiting the closing or opening of the emptying plate. When the piston rod of the discharging cylinder 53 extends out to drive the discharging groove 51 to rotate upwards to enable the discharging plate 52 to close the rear opening of the striker plate 30, the discharging cylinder door-closing limit switch 107 is triggered, and when the piston rod of the discharging cylinder 53 retracts to drive the discharging groove 51 to rotate downwards to enable the discharging plate 52 to be in an inclined state, the discharging cylinder door-opening limit switch 106 is triggered. The discharging chute 51 is provided with a discharging plate sensor for detecting the downward movement position of the discharging plate 52, for example in the present embodiment, a first emptying plate sensor 201, a second emptying plate sensor 202, a third emptying plate sensor 203, a fourth emptying plate sensor 204, a fifth emptying plate sensor 205 and a sixth emptying plate sensor 206 are arranged together, when the discharging plate 52 moves downwards to the tail end of the first fiber bag 1-1, the first discharging plate sensor 201 is triggered, when the discharging plate moves to the tail end of the second fiber bag 1-2, the second discharging plate sensor 202 is triggered, when the discharging plate moves to the tail end of the third fiber bag 1-3, the third discharging plate sensor 203 is triggered, when the discharging plate moves to the tail end of the fourth fiber bag 1-4, the fourth discharging plate sensor 204 is triggered, when the discharging plate moves to the tail end of the fifth fiber bag 1-5, the fifth discharging plate sensor 205 is triggered, and when the discharging plate moves to the tail end of the sixth fiber bag 1-6, the sixth discharging plate sensor 206 is triggered. The material feeding plate 52 is provided with a material sensor 207 for detecting whether the fiber package is positioned in the first row. In this embodiment, the striker plate 30 is further provided with a starved material sensor (not shown in the figure), the starved material sensor is arranged at a position of the third row of fiber bales, and when the starved material sensor detects that no fiber bale is located at the position of the third row of fiber bales, the alarm is given to stop feeding and wait for feeding.

The limit switch and the sensor are both in the prior art, in the implementation, the limit switch is preferably of a Deleis LXJMI-8108 model, and the sensor is preferably of a Deleis CDJ10 model.

The front limit switch 101 of the positioning plate, the rear limit switch 102 of the positioning plate, the upper limit switch 104 of the positioning rod, the lower limit switch 103 of the positioning rod, the upper limit switch 105 of the discharging plate, the door opening limit switch 106 of the discharging cylinder, the door closing limit switch 107 of the discharging cylinder, the material shortage sensor, the first discharging plate sensor 201, the second discharging plate sensor 202, the third discharging plate sensor 203, the fourth discharging plate sensor 204, the fifth discharging plate sensor 205, the sixth discharging plate sensor 206, the material sensing sensor 207, the conveying belt driving motor 24 and the screw rod driving motor 544 are all connected with a PLC (programmable logic controller), and the PLC is connected with a stirrer control system and can receive discharging signals of the stirrer. And a counter is arranged in the PLC, and the counter is used for counting the times of triggering the discharging plate sensor. The PLC controller is conventional and in this implementation is preferably of the type siemens S7-1200, CPU 1215C.

Referring to fig. 6 to 8, an automatic discharging method of a fiber discharging machine according to embodiment 1 includes the following steps connected in sequence:

1) in an initial state, the PLC receives a blender batching signal, the initial state comprises: the discharging cylinder 53 is at the door closing limit, the discharging plate 52 is at the upper limit, the material sensor 207 detects the presence of material, the sliding positioning plate 41 is at the front limit, and the positioning rod 42 is at the upper limit;

2) the PLC detects whether the fiber feeder is in an initial state, namely, the feeding cylinder door closing limit switch 107, the feeding plate upper limit switch 105, the material sensor 207, the positioning plate front limit switch 101 and the positioning rod upper limit switch 104 are triggered to enter the next step;

3) after receiving the trigger signal of the step 2), the PLC controls the conveyer belt driving motor 24 to rotate reversely so that the sliding positioning plate 41 moves to a rear limiting position, and triggers the positioning plate rear limiting switch 102;

4) after receiving the trigger signal in the step 3), the PLC controls a piston rod of the positioning cylinder 43 to extend out, so that the positioning rod 42 is penetrated into a first row of fiber packages below the positioning plate, and the lower limit switch 103 of the positioning rod is triggered;

5) after receiving the trigger signal of the step 4), the PLC controls the retraction of a piston rod of the discharging cylinder 53, so that the discharging groove rotates the discharging plate 52 outwards to open 135 degrees, the first row of fiber packages (1-1, 1-2, 1-3, 1-4, 1-5 and 1-6) are sequentially supported on the discharging plate along with the discharging plate in an inclined manner, and the door opening limit switch 106 of the discharging cylinder is triggered;

6) after receiving the trigger signal of the step 5), the PLC controls the screw rod driving motor 544 to rotate reversely, the discharging plate 52 moves downwards, the first fiber package 1-1 falls off, when the discharging plate 52 moves to the tail end of the first fiber package, the first discharging plate sensor 201 is triggered, and the counter starts to count;

7) after receiving the trigger signal of the step 5), the PLC controls the screw rod driving motor 544 to continuously rotate reversely, the discharging plate 52 continues to move downwards, the second fiber-coated package 1-2 falls off, when the discharging plate 52 moves to the tail end of the second fiber-coated package, the second discharging plate sensor 202 is triggered, the accumulated count of the counter is 2, the set value is reached, and the counter is cleared; the lead screw drive motor 544 stops rotating;

8) when the PLC controller receives the batching signal of the stirrer again, the screw rod driving motor 544 is controlled to rotate reversely again, the discharging plate 52 continues to move downwards, and the steps 6) and 7) are repeated until the last bale 1-6 falls off, the sixth discharging plate sensor 206 is triggered when the discharging plate 52 moves to the tail end of the sixth bale, and the counter is cleared;

9) after receiving the trigger signal of the sixth feeding plate sensor 206, the PLC controller controls the lead screw driving motor 544 to rotate forward, the feeding plate 52 moves up to the upper limit position and returns to the initial position, and the upper limit switch 105 of the feeding plate is triggered;

10) after the PLC reaches the trigger signal of the step 9), the piston rod of the discharging cylinder 53 is controlled to extend, the discharging groove 51 rotates the discharging plate 52 inwards to be closed, the discharging cylinder 53 is in a door closing limit position and returns to an initial position, and the door closing limit switch 107 of the discharging cylinder is triggered;

11) after receiving the trigger signal in the step 10), the PLC controller controls the piston rod of the positioning cylinder 43 to retract, the positioning rod 42 is drawn out from the fiber package, the positioning rod is at the upper limit and returns to the initial position, and the upper limit switch 104 of the positioning rod is triggered;

12) after receiving the trigger signal of the step 11), the PLC controls the conveyer belt driving motor 24 to rotate forwardly, the sliding positioning plate 41 and the conveyer belt 21 move forwards synchronously, the second row of fiber packages move to the first row of fiber packages, and the sliding positioning plate 41 is positioned at the front limit position and returns to the initial position;

13) and (3) repeating the actions from the step 1) to the step 12) until the starved feeding sensor gives an alarm, and controlling the fiber feeder to stop after the PLC receives an alarm signal to wait for feeding.

Referring to fig. 5, during charging, the discharging cylinder 53 is at the door closing limit, the discharging plate 52 is at the upper limit, the material sensor 207 detects the presence of material, the sliding positioning plate 41 is at the front limit, and the positioning rod 42 is at the upper limit; the operator puts into the fibre package in proper order from the front to back.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A fiber feeder for a concrete batching plant, characterized by comprising:

the frame is used for supporting the feeder and installing each part;

the belt conveyor is obliquely arranged at the top of the rack from back to front and is used for supporting and conveying the fiber package;

the material blocking plates are vertically arranged on two sides of the belt conveyor and form a storage and moving space for the fiber bag together with the belt conveyor; the space can store a plurality of rows of fiber bags;

the sliding positioning mechanism is used for fixing the second row of fiber packages to prevent the second row of fiber packages from toppling or sliding during material placing, and comprises a sliding positioning plate, a positioning rod, a positioning cylinder and a synchronizing mechanism, wherein the sliding positioning plate is arranged at the top of the material baffle plate, can be driven by the synchronizing mechanism to synchronously slide to the upper side of the first row of fiber packages from the upper side of the second row of fiber packages with the conveying belt, and can also be driven by the synchronizing mechanism to slide to the upper side of the second row of fiber packages from the upper side of the first row of fiber packages when the conveying belt does; the positioning cylinder is vertically arranged on the sliding positioning plate, a cylinder piston rod is coaxially connected with the positioning rod, and the positioning rod can penetrate through the sliding positioning plate to be inserted into a row of fiber packages below under the driving of the positioning cylinder;

the discharging mechanism is used for releasing the fiber packages stored in the material baffle plate into the mixing station one by one and comprises a discharging cylinder, a discharging plate and a discharging groove, the middle part of the discharging groove is rotatably arranged at the rear end of a rack of the belt conveyor through a rotating shaft, the discharging plate is slidably inserted into the discharging groove, when the discharging groove rotates to a vertical state, the discharging plate moves upwards, and the opening at the rear side of the material baffle plate is closed to stop the slippage of the fiber packages; when the discharging groove rotates to an inclined state, the discharging plates move downwards to release a row of fiber packages supported on the discharging plates one by one; blowing cylinder one end is fixed in the frame rear side, and the cylinder piston rod of the other end is articulated with the blowing groove, and blowing cylinder drive blowing groove revolutes the rotation of axes.

2. A fibre feeder according to claim 1, characterised in that each column of fibre bales stacks 2N bales of fibre, N being a natural number equal to or greater than 1.

3. A fiber feeder according to claim 1 or 2, characterized in that the synchronizing mechanism comprises a positioning plate rack, a positioning plate gear, a first rotating shaft, a positioning plate driving wheel, a synchronous belt, a synchronous wheel, a conveyer belt driving roller, a second rotating shaft, a speed reducer and a conveyer belt driving motor; the synchronous wheel and the conveying belt driving roller are coaxially sleeved on the second rotating shaft, and the conveying belt driving motor drives the second rotating shaft to rotate through the speed reducer; the first rotating shaft is rotatably installed on the outer side of the material baffle plate, the positioning plate gear and the positioning plate driving wheel are coaxially sleeved on the first rotating shaft, the positioning plate driving wheel is connected with the synchronizing wheel through a synchronous belt, the positioning plate rack is fixed on the lower side surface of the sliding positioning plate, the positioning plate rack and the positioning plate gear form a gear-rack transmission pair, and the conveying belt driving motor drives the sliding positioning plate to move forwards synchronously with the conveying belt.

4. A fibre feeder according to claim 3, wherein the belt drive roller is mounted on the belt drive roller by a one-way bearing for limiting the counter-rotation of the belt.

5. A fibre feeder according to claim 3, characterised in that the timing belt is a chain or belt and the positioning plate drive wheel and timing wheel are sprockets or pulleys.

6. A fibre feeder according to claim 1 or 2, characterised in that the angle of inclination of the belt conveyor is 10 ° to 15 °.

7. A fiber feeder according to claim 1 or 2, characterized in that the material discharge plate is connected with the material discharge groove through a feed screw and nut mechanism, the feed screw and nut mechanism comprises a feed screw, a nut and a feed screw driving motor; the screw rod driving motor is fixedly installed at the lower end of the discharging groove, the nut is fixed at the lower end of the discharging plate, one end of the screw rod penetrates through the nut in a spiral mode, the other end of the screw rod is fixedly connected with the motor shaft in a coaxial mode, and the screw rod driving motor drives the screw rod to rotate in the nut so as to drive the discharging plate to slide up and down in the discharging groove.

8. A fiber feeder according to claim 3, characterized in that the feeding plate is connected with the feeding trough through a feed screw and nut mechanism, the feed screw and nut mechanism comprising a feed screw, a nut and a feed screw driving motor; the screw rod driving motor is fixedly installed at the lower end of the discharging groove, the nut is fixed at the lower end of the discharging plate, one end of the screw rod penetrates through the nut in a spiral mode, the other end of the screw rod is fixedly connected with the motor shaft in a coaxial mode, and the screw rod driving motor drives the screw rod to rotate in the nut so as to drive the discharging plate to slide up and down in the discharging groove.

9. A fiber feeder according to claim 8, characterized in that the striker plate is provided with a positioning plate front limit switch and a positioning plate rear limit switch for limiting the sliding distance of the sliding positioning plate, the positioning cylinder is provided with a positioning rod upper limit switch and a positioning rod lower limit switch for limiting the telescopic distance of the positioning rod, the discharging tank is provided with a discharging plate upper limit switch for limiting the upward moving position of the discharging plate, the discharging cylinder is provided with a discharging cylinder door opening limit switch and a discharging cylinder door closing limit switch for limiting the door closing or opening of the discharging plate, the discharging tank is provided with discharging plate sensors which are arranged corresponding to the fiber packages one by one and used for detecting the downward moving position of the discharging plate, and the discharging plate is provided with a material sensor for detecting whether the fiber packages are positioned in the first row; the limit switch and the sensor are connected with a PLC (programmable logic controller), and the PLC is also respectively connected with a positioning cylinder, a discharging cylinder, a conveying belt driving motor and a screw rod driving motor; and a counter is arranged in the PLC, and the counter is used for counting the times of triggering the discharging plate sensor.

10. An automatic emptying method for a fiber feeder according to claim 9, which is characterized by comprising the following steps:

1) receiving a mixer batching signal by a PLC controller;

2) the method comprises the steps that a PLC detects whether a fiber feeder is in an initial state, wherein the initial state is that a sliding positioning plate is in a front limit position, a positioning rod is in an upper limit position, a discharging plate is in the upper limit position, a material sensor detects that materials are available and a discharging cylinder is in a door closing limit position;

3) the PLC controller controls the conveyer belt driving motor to rotate reversely so that the sliding positioning plate moves to the rear limiting position;

4) the PLC controller controls a piston rod of the positioning air cylinder to extend out to enable the positioning rod to penetrate into a row of fiber packages below the positioning plate, and the positioning rod is positioned at the lower limit position;

5) the PLC controller controls a piston rod of a discharging cylinder to retract so that the discharging chute rotates outwards to open a discharging plate, a first row of fiber packages are supported on the discharging plate, and the discharging cylinder is in the step of limiting opening of the door;

6) the PLC controls the screw rod to drive the motor to rotate reversely so that the discharging plate moves downwards, the first fiber package falls, the discharging plate triggers the first discharging plate sensor, and the counter starts counting;

7) the PLC controller controls the screw rod driving motor to continuously rotate reversely to enable the discharging plate to move downwards, the second package fiber package falls, the discharging plate triggers a second discharging plate sensor, and the counter counts up;

8) when the accumulated value of the counter reaches a set value, the PLC controller controls the screw rod driving motor to stop rotating, and the counter is reset;

9) the PLC receives the batching signal of the stirrer again;

10) the PLC controls the screw rod driving motor to rotate reversely to enable the discharging plates to move downwards, the last fiber package falls, the discharging plates trigger the last discharging plate sensor, the counter is reset, and the screw rod driving motor rotates forwards to enable the discharging plates to move upwards to be limited and return to the initial position;

11) the PLC controller controls a discharging cylinder piston rod to extend out to enable a discharging groove to rotate a discharging plate inwards to be closed, and a discharging cylinder is positioned at a door closing limit and returns to an initial position;

12) the PLC controller controls a piston rod of the positioning cylinder to retract so that the positioning rod is drawn out of the fiber package, is positioned at an upper limit position and returns to an initial position;

13) and the PLC controls the conveyer belt driving motor to rotate forwards to enable the sliding positioning plate and the conveyer belt to move forwards synchronously, the second row of fiber packages move to the first row of fiber packages, and the sliding positioning plate is in front limit and returns to the initial position.

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