A reciprocating cleaning scraper

Abstract

The present invention relates to a reciprocating material cleaning scraper, comprising a driving cylinder, a bottom plate and a movable frame on the bottom plate; a scraper is arranged in the movable frame, and an upper shaft and a lower shaft are arranged at both ends of the scraper, the upper shaft is inserted into a first pin hole on the frame of the movable frame, and the lower shaft passes through a second pin hole on a slider; when the driving cylinder drives the movable frame forward, the movable frame drives the upper shaft and the scraper to rotate forward around the lower shaft, when the movable frame collides with the lower shaft, the lower edge of the scraper approaches the bottom plate and forms a first gap with the bottom plate, and the driving cylinder drives the movable frame to start moving forward; when the driving cylinder drives the movable frame backward, the movable frame drives the upper shaft and the scraper to rotate in the opposite direction around the lower shaft, when the movable frame collides with the lower shaft, the lower edge of the scraper leaves the bottom plate and forms a second gap with the bottom plate, and the driving cylinder drives the movable frame to start moving backward, and the first gap is smaller than the second gap. The scraper has a low installation height and a simple structure, and is particularly suitable for installation and use in extremely narrow spaces.

Description

Technical Field

[0001] The invention relates to a reciprocating material cleaning scraper and belongs to the technical field of belt transportation. Background Art

[0002] In the prior art, the publication (announcement) number: CN206203331U "A Reciprocating Pusher Scraper" discloses a reciprocating pusher scraper, which is a belt conveyor cleaning scraper. Its technical principle is: when the pusher is pushed forward, the pusher force is transmitted to the head section sliding side beam through the head section scraper and the head section scraper bracket, driving the head section sliding side beam to slide forward, and the head section sliding side beam then drives the middle section sliding side beam to slide forward, and the middle section sliding side beam will drive the middle section scraper bracket and the middle section scraper to move forward, so that the entire scraper can scrape forward. When the scraper is pushed to the end of the pusher stroke, the scraper pushes the tail section climbing plate to offset the spring force and rotate upward to pass through the tail section climbing plate. After passing through the tail section climbing plate, the scraper is reset under the action of the spring force. When the push rod retreats and resets, the scraper will climb up along the middle climbing plate and detach from the middle bottom plate to a certain height. The scraper will not scrape the material back during the backward movement. After the push rod completes the reset, the scraper falls from the end of the fixed side beam. The scraper of this technology is lifted and lowered by the climbing plate during the reciprocating movement. The structure is complicated, and when the scraper is raised by the climbing plate, the overall height of the scraper is increased, which is not conducive to installation in an overly narrow space. In addition, the scraper is divided into three parts: the head section, the middle section and the tail section. The structures of the three sections are different and are not interchangeable.

[0003] The present application proposes a rotatable scraper structure to solve the above problems. Summary of the invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a reciprocating material cleaning scraper, which has low installation height and reliable operation, and is particularly suitable for use at the head of a belt conveyor in an extremely narrow space.

[0005] In order to solve the above technical problems, the present invention proposes a technical solution: a reciprocating cleaning scraper, comprising a driving cylinder, a bottom plate and a movable frame arranged on the bottom plate;

[0006] One end of the driving cylinder is connected to the base plate, and the other end is connected to the movable frame;

[0007] Guide rails are provided on both sides of the bottom plate, a guide groove is provided in the middle of the guide rail, a slider is provided in the guide groove, a friction member with initial friction formed with the guide rail is provided on the slider, a scraper is provided in the movable frame, an upper shaft and a lower shaft are provided at both ends of the scraper, the upper shaft is inserted into a first pin hole provided on the frame of the movable frame, and the lower shaft passes through a second pin hole provided on the slider and is fixedly connected by a nut;

[0008] When the driving cylinder drives the movable frame forward, the movable frame drives the upper shaft and the scraper to rotate forward around the lower shaft until the movable frame collides with the lower shaft, and the lower edge of the scraper approaches the bottom plate and forms a first gap with the bottom plate; the movable frame, the upper shaft, the slider, the lower shaft and the scraper move forward;

[0009] When the driving cylinder drives the movable frame backward, the movable frame drives the upper shaft and the scraper to rotate in the opposite direction around the lower shaft until the movable frame collides with the lower shaft, and the lower edge of the scraper leaves the bottom plate and forms a second gap with the bottom plate; the movable frame, the upper shaft, the slider, the lower shaft and the scraper move backward;

[0010] The first gap is smaller than the second gap.

[0011] The beneficial effects brought by the present invention are: when the driving cylinder reciprocates to drive the movable frame, the friction resistance generated by the friction member with initial friction force causes the lower shaft to be stationary and not displaced, so that the driving cylinder can drive the movable frame to swing forward and backward. When the movable frame moves forward, the scraper installed on the movable frame can scrape the material vertically. When moving backward, the lower end of the scraper can lift the material away from the bottom plate and move backward. The overall height of the cleaning scraper is low, only about one-third of the height of the traditional chain scraper. It is greatly adapted to various installation conditions on site and solves the problem that the traditional scraper cannot be installed due to limited installation space. It has a simple structure, convenient maintenance, low failure rate, long life, and low manufacturing cost, which is conducive to large-scale promotion and use.

[0012] Furthermore, both ends of the scraper are provided with pads and are fixedly connected by bolts, the lower shaft is fixed on the pads and located above the bolts, and the upper shaft is fixed on the upper side of the pads.

[0013] Furthermore, a spring is provided between the nut and the slider, and the spring can adjust the friction resistance of the friction member with the initial friction force, so as to facilitate the driving cylinder to drive the movable frame.

[0014] In order to clean the materials on the entire bottom plate, further, the scraper is in the shape of an elongated strip, and is parallelly and equidistantly distributed in the movable frame, and the number of the scraper is greater than or equal to one.

[0015] Furthermore, through holes are provided at both ends of the other side frame of the movable frame, and adjacent movable frames are fixedly connected by bolts through the through holes.

[0016] Furthermore, the movable frame is in the shape of a rectangle or a square, the number of which is greater than or equal to one section, and the structure, size, and shape are the same. Compared with chain-type scrapers and other types of scrapers, the scraper of the present invention no longer has a head section, a middle section, and a tail section with completely different structures, and the length is composed of several movable sections with the same length, which has good interchangeability and is flexible to use, and meets the installation requirements of different lengths.

[0017] In order to make the scraper at the rear of the bottom plate clean the material completely, the bottom plate is further a rectangular iron plate with a notch at the rear, and the length of the guide groove exceeds the notch at the rear of the bottom plate. The displacement distance of the scraper at the rear of the bottom plate exceeds the notch position at the rear of the bottom plate, so that the material on the bottom plate can be easily cleaned off the bottom plate.

[0018] In order to enable the rear scraper to transfer materials to the front scraper, further, the stroke of the driving cylinder is set to be greater than the parallel spacing between adjacent scrapers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural diagram of a reciprocating cleaning scraper.

[0021] Figure 2 yes Figure 1 Schematic diagram of the midsole plate and guide rail layout.

[0022] Figure 3 yes Figure 1 Schematic diagram of the active framework structure.

[0023] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle scraper.

[0024] Figure 5 yes Figure 1 Schematic diagram of the assembly of the middle scraper and the movable frame.

[0025] Figure 6 yes Figure 1 A partial enlarged view of area A in the middle.

[0026] Figure 7 It is a schematic diagram of the structure of the scraper of the cleaning scraper machine in the scraping state.

[0027] Figure 8 It is a schematic diagram of the structure of the scraper of the cleaning scraper in the return state.

[0028] Fig. 9 It is a schematic diagram of the structural position of a scraper with a dual drive cylinder arrangement.

[0029] The numbers in the figure are as follows: 1-base plate, 2-guide rail, 201-guide groove, 3-driving cylinder, 4-movable frame, 5-scraper, 6-head connecting seat, 7-tail connecting seat, 8-slider, 801-second pin hole, 9-friction member with initial friction force, 10-spring, 11-nut, 401-first pin hole, 402-through hole, 501-upper shaft, 502-lower shaft, 503-pad, 12-bolt. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] This embodiment provides a Figure 1 The reciprocating cleaning scraper shown is arranged at the bottom of the head or tail of the belt conveyor, one end of which extends into the chute at the head or tail of the belt conveyor, and comprises a driving cylinder 3, a bottom plate 1 and a movable frame 4 arranged on the bottom plate 1;

[0032] The drive cylinder 3 is a telescopic rod, and preferably the drive cylinder 3 is in the form of a hydraulic cylinder or an electric push rod. In this embodiment, the drive cylinder 3 is a hydraulic cylinder, one end of which is connected to the bottom plate 1 through a pin shaft and a tail connection seat 7, and the other end is connected to the frame of the movable frame 4 through a pin shaft and a head connection seat 6. When the drive cylinder 3 reciprocates, the movable frame 4 follows and reciprocates synchronously. The travel of the drive cylinder 3 during movement is set to be greater than the parallel spacing between adjacent scrapers 5.

[0033] like Figure 2 As shown, the bottom plate 1 is a rectangular iron plate, the width of which is slightly smaller than the width of the belt conveyor support, and a notch is provided at the tail. Long strip guide rails 2 are provided on both sides of the bottom plate 1, and a guide groove 201 is provided in the middle of the guide rail 2, and the length of the guide groove 201 exceeds the notch at the tail of the bottom plate 1.

[0034] like Figure 3 and Figure 5 As shown, the movable frames 4 are rectangular or square in shape, the number of which is greater than or equal to one segment, and the structure, size, and shape are the same. Through holes 402 are symmetrically provided at both ends of one frame of the movable frame 4, and a first pin hole 401 is provided on the other frame. Adjacent movable frames 4 are fixedly connected by bolts through the through holes 402 to meet the different length requirements of the cleaning scraper.

[0035] like Figure 3 , Figure 4 and Figure 5As shown, more than or equal to one scraper 5 is arranged in parallel and equidistantly in the movable frame 4, and the spacing between them is less than the reciprocating stroke of the driving cylinder 3. The scraper 5 is a long strip scraper, with an upper shaft 501, a lower shaft 502 and a pad 503 of the same width as the scraper 5 at both ends. The scraper 5 and the pad 503 are fixedly connected by bolts 12, and the head of the upper shaft 501 is inserted into the first pin hole 401, so that the scraper 5 has the function of swinging around the first pin hole 401. The tail of the upper shaft 501 is fixed to the upper side of the pad 503, and the tail of the lower shaft 502 is fixed to the front of the pad 503, located above the bolt 12, and the head of the lower shaft 502 is provided with a thread, and a nut 11 is screwed on the thread.

[0036] Figure 6 yes Figure 1 A partial enlarged view of part A in the middle, a second pin hole 801 is provided on the slider 8, the head of the lower shaft 502 passes through the second pin hole 801 on the slider 8, the slider 8 is located in the guide groove, and reciprocates with the driving cylinder 3, a spring 10 is provided between the slider 8 and the nut 11, and a friction member 9 with a starting friction force is provided on the slider 8. The friction member 9 with a starting friction force is pressed against the surface of the guide rails 2 on both sides by the spring 10, and its pressing force is adjusted by the nut 11, so as to achieve the purpose of adjusting the friction resistance between the friction member 9 with a starting friction force and the surface of the guide rail 2.

[0037] Working principle:

[0038] When the driving cylinder 3 performs reciprocating motion, the friction resistance generated by the friction member 9 having the initial friction force causes the lower shaft to temporarily stop and not move, so that the driving cylinder 3 can drive the movable frame 4 to swing back and forth.

[0039] When the scraper moves forward, Figure 6 and Figure 7 As shown, the driving cylinder 3 extends in the direction of the arrow in the figure to push the material out. In the initial stage of pushing the driving cylinder 3 out, the driving cylinder 3 extends forward to push the movable frame 4 forward. Since there is a large friction resistance between the friction member 9 with initial friction force on the slider 8 and the surface of the guide rail 2, the slider 8 remains temporarily stationary, and the lower shaft 502 on the scraper 5 inserted in the slider 8 cannot move forward. However, at this time, the movable frame 4 drives the upper shaft 501 to rotate forward around the lower shaft 502, and at the same time drives the scraper 5 to rotate forward around the lower shaft 502 until the lower shaft 502 collides with the bottom of the frame of the movable frame 4 and stops. At this time, the scraper 5 remains in a relatively vertical state, and a small gap is maintained between the lower edge of the scraper 5 and the bottom plate 1. When the scraper 5 cannot continue to rotate due to the resistance of the movable frame 4, the driving cylinder 3 pushes the movable frame 4 to overcome the friction resistance between the friction member 9 with initial friction force and the surface of the guide rail 2, and drives the scraper 5 to maintain a relatively vertical state to scrape the material forward.

[0040] When the material is not scraped during the return movement, Figure 6 and Figure 8 As shown, the drive cylinder 3 performs a retracting movement in the direction of the arrow in the figure, which is the return movement of the non-scraping scraper 5. In the initial stage of the retraction of the drive cylinder 3, the drive cylinder 3 retracts and pulls the movable frame 4 backward. Since there is a large friction resistance between the friction member 9 with the initial friction force on the slider 8 and the surface of the guide rail 2, the slider 8 remains temporarily stationary, and the lower shaft 502 inserted in the slider 8 cannot retreat. However, at this time, the movable frame 4 drives the upper shaft 501 to rotate in the opposite direction around the lower shaft 502, and the movable frame 4 drives the upper shaft 501 to retreat, that is, the upper shaft 501 drives the scraper 5 to rotate in the opposite direction around the lower shaft 502 until the lower shaft 502 collides with the bottom of the frame of the movable frame 4 and stops. At this time, the lower edge of the scraper 5 is close to the movable frame 4, and a large gap is maintained between the lower edge of the scraper 5 and the bottom plate 1. When the scraper 5 cannot continue to rotate, the drive cylinder 3 pulls the movable frame 4 to overcome the friction resistance between the friction member 9 with the initial friction force and the guide rail 2, and drives the scraper 5 to keep returning.

[0041] When the driving cylinder 3 continuously reciprocates, the movable frame 4 drives the scraper 5 to follow the above reciprocating motion. Since the stroke set by the driving cylinder 3 during the movement is greater than the parallel spacing between the scrapers 5, the materials falling into the reciprocating cleaning scraper are intermittently pushed out to achieve the purpose of cleaning.

[0042] Fig. 9 It is an improvement made on the basis of the first embodiment. The driving cylinder 3 is a double cylinder, which is fixed on both sides of the base plate 1 respectively. The fixing method of its two ends to the base plate 1 and the movable frame 4 is the same as that of the first embodiment. Of course, the driving cylinder 3 can also be three cylinders or more, which will not be repeated in this embodiment.

[0043] The present invention is not limited to the above embodiments, for example: the main drive is changed from the drive cylinder 3 to a crank slider device for reciprocating motion; the shape of the movable frame is changed to a square; the way of adjusting the friction resistance by the spring 10 is changed to the way of pressing the slider 8 by gravity; the connection between the movable frames is changed to a hinge connection, etc. All technical solutions formed by equivalent replacement fall within the protection scope required by the present invention.

Claims

1. A reciprocating cleaning scraper, comprising a driving cylinder, a bottom plate and a movable frame arranged on the bottom plate; One end of the driving cylinder is connected to the base plate, and the other end is connected to the movable frame; Features: Guide rails are provided on both sides of the bottom plate, a guide groove is provided in the middle of the guide rail, a slider is provided in the guide groove, a friction member with initial friction formed with the guide rail is provided on the slider, a scraper is provided in the movable frame, an upper shaft and a lower shaft are provided at both ends of the scraper, the upper shaft is inserted into a first pin hole provided on the frame of the movable frame, and the lower shaft passes through a second pin hole provided on the slider and is fixedly connected by a nut; When the driving cylinder drives the movable frame forward, the movable frame drives the upper shaft and the scraper to rotate forward around the lower shaft until the movable frame collides with the lower shaft, and the lower edge of the scraper approaches the bottom plate and forms a first gap with the bottom plate; the movable frame, the upper shaft, the slider, the lower shaft and the scraper move forward; When the driving cylinder drives the movable frame backward, the movable frame drives the upper shaft and the scraper to rotate in the opposite direction around the lower shaft until the movable frame collides with the lower shaft, and the lower edge of the scraper leaves the bottom plate and forms a second gap with the bottom plate; the movable frame, the upper shaft, the slider, the lower shaft and the scraper move backward; The first gap is smaller than the second gap.

2. The reciprocating cleaning scraper according to claim 1, characterized in that: Both ends of the scraper are provided with pads and are fixedly connected by bolts, the lower shaft is fixed on the pad and located above the bolts, and the upper shaft is fixed on the upper side of the pad.

3. The reciprocating cleaning scraper according to claim 1, characterized in that: A spring is arranged between the nut and the slider.

4. The reciprocating cleaning scraper according to claim 1, characterized in that: The scrapers are in the shape of long strips, are distributed in parallel and equidistantly in the movable frame, and the number of the scrapers is greater than or equal to one.

5. The reciprocating cleaning scraper according to claim 1, characterized in that: Through holes are provided at both ends of the other side frame of the movable frame, and adjacent movable frames are fixedly connected by bolts through the through holes.

6. The reciprocating cleaning scraper according to claim 1, 4 or 5, characterized in that: The movable frames are rectangular in shape, the number of the movable frames is greater than or equal to one, and the structures, sizes and shapes are the same.

7. The reciprocating cleaning scraper according to claim 1, characterized in that: The bottom plate is a rectangular iron plate with a notch at the tail, and the length of the guide groove exceeds the notch at the tail of the bottom plate.

8. The reciprocating cleaning scraper according to claim 1, characterized in that: The stroke set for the driving cylinder is greater than the parallel spacing between adjacent scrapers.

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