Magnetic throwing device

Abstract

The invention discloses a magnetic throwing device, which relates to the technical field of metal surface treatment and comprises a shell, a bearing, an end cover, a roller pressing plate, a power roller, a belt pulley, a driving motor and a controller, bearings and end covers are installed at the two ends of the shell respectively, roller pressing plates which are oppositely arranged are fixed to inner rings of the two bearings respectively, the power roller is arranged in the shell, connecting shafts are fixed to the two ends of the power roller respectively, the two connecting shafts are fixed into the two roller pressing plates respectively, one end of one connecting shaft extends out of the shell and is fixedly provided with a belt pulley, and the other end of the other connecting shaft extends out of the shell. The belt pulley is rotationally connected with the driving motor through a belt, through holes are coaxially formed in the power roller and the connecting shaft, and the magnetic attraction mechanism is electrically connected with the power source and the controller. The device has the advantages that the range of the magnetic force on the surface of the power roller can be controlled through the controller, and the throwing flow during adsorption of steel shots can be conveniently adjusted; the angle of the guide plate is adjusted through the bolt, so that the shot blasting angle range is controlled, abrasion is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface treatment, in particular to a magnetic ejector. Background Art

[0002] Shot blasting is the name of a mechanical surface treatment process; shot blasting is usually required during the metal cold treatment process. Shot blasting can effectively remove dirt, oxide layer, burrs, etc. on the metal surface, thereby improving the surface quality and service life of metal parts.

[0003] The existing shot blasting treatment mainly adopts shot blasting machine for shot blasting. Since the shot blasting process blasts steel pellets, the impeller in the shot blasting machine is greatly worn by the steel pellets after long-term operation. A flow control valve is generally installed on the feed pipe of the shot blasting machine to control the feeding of the steel pellets. The valve core of the flow control valve will also be worn during the feeding process of the steel pellets, resulting in a shortened service life of the flow control valve, causing large flow fluctuations and the inability to quickly adjust the flow in real time. Therefore, it is necessary to frequently replace or repair parts, and the repair cost is relatively high. Summary of the invention

[0004] The object of the present invention is to provide a magnetic projectile to solve the problems raised in the above background technology.

[0005] The present invention is implemented by the following technical solutions: A magnetic ejector comprises a shell, a bearing, an end cover, a roller plate, a power roller, a pulley, a driving motor and a controller; the shell is assembled from a front shell and a rear shell, bearings and end covers are installed at both ends of the shell, roller plates arranged opposite to each other are fixed to the inner rings of the two bearings, the power roller is placed in the shell, connecting shafts are fixed to both ends of the power roller, the two connecting shafts are fixed in the two roller plates, one end of one of the connecting shafts extends out of the shell and is fixed with a pulley, the pulley is rotatably connected to the driving motor through a belt, a through hole is coaxially provided on the power roller and the connecting shaft, a magnetic attraction mechanism is arranged on the power roller, the connecting shaft and the through hole, the magnetic attraction mechanism is electrically connected to a power supply and a controller respectively, a guide plate is rotatably arranged on the front shell, the upper end surface of the guide plate is movably fitted with the surface of the power roller, and a feed pipe is installed on the rear shell.

[0006] Preferably, the magnetic attraction mechanism includes a bracket, a telescopic device, an electrode, a magnetic attraction component and a terminal; the bracket is fixed on the end cover, the telescopic device is installed on the bracket, one end of the piston rod of the telescopic device is fixed with an electrode, the electrode is inserted into the through hole, and a number of magnetic attraction components are evenly arranged on the power roller. The electrode and the contact terminal of the magnetic attraction component are in active contact to form a closed loop, so that the magnetic attraction component generates magnetic force, the terminal is installed on the bracket, one end of the terminal is connected to the electrode, and the other end of the terminal is connected to the power supply, the telescopic device and the controller are electrically connected, and the controller is installed on the shell.

[0007] Preferably, the telescopic device is an electric push rod, an electric screw lift or a telescopic cylinder.

[0008] Preferably, a plurality of pairs of strip grooves are evenly formed on the outer surface of the middle part of the power roller, a plurality of wiring grooves corresponding to and connected to the strip grooves are formed on both side end surfaces of the middle part of the power roller, an annular groove is formed on the surface of the connecting shaft, and slots corresponding to the number of the wiring grooves are formed on the annular groove, and a limit stopper is fixed in each slot; Each magnetic attraction component includes several pairs of magnetic stripe components, a first wire, a second wire, a contact terminal, a compression spring and a rubber retaining ring; each pair of magnetic stripe components includes two metal magnetic stripes, and each pair of stripe grooves corresponds to a pair of magnetic stripe components; the metal magnetic stripes are embedded in the stripe grooves one by one, and one end of the two metal magnetic stripes of each pair of magnetic stripe components is connected by a first wire, and the middle of the first wire is inserted into the through hole and the corresponding slot; the other ends of the two metal magnetic stripes of each pair of magnetic stripe components are connected to the contact terminals through the second wire respectively; the contact terminal is elastically slidably arranged in the slot, one end of the contact terminal is movably placed in the through hole and movably contacted with the electrode surface, a block that movably abuts against the limit block is fixed on the contact terminal, the other end of the contact terminal is fixed to one end of the compression spring, the other end of the compression spring abuts against the inner surface of the rubber retaining ring, and the rubber retaining ring is sleeved in the annular groove.

[0009] Preferably, when the compression spring is in a natural state, the lengths of the contact terminals corresponding to the pairs of magnetic stripe assemblies extending into the through holes are inconsistent, and the electrodes are truncated cone-shaped.

[0010] Preferably, a rotating shaft is rotatably provided on the front shell body, and a plurality of connecting plates are fixed on the rotating shaft, and each connecting plate is symmetrically provided with two strip through grooves, and the strip through grooves are provided with threaded holes corresponding to the strip through grooves one by one, and the first bolt can slide in the strip through groove, and the first bolt passes through the strip through groove and is threadedly connected to the threaded hole to fix and clamp the connecting plate and the guide plate, and an arc-shaped slide rail is installed on one side of the front shell body, and a nut is slidably provided in the arc-shaped slide rail, and the nut is threadedly connected with a second bolt, and the end of the second bolt abuts against the end face of the guide plate for clamping and fixing, so as to realize the angle adjustment of the guide plate.

[0011] Preferably, the two opposite lower surfaces of the two roller plates are respectively in contact with the two end surfaces of the power roller.

[0012] Preferably, two cylindrical grooves are formed at one end of the contact terminal, and one end of the compression spring is fixed in the cylindrical groove.

[0013] Preferably, the contact surfaces of the magnetic strip assembly, the first conductive wire, the second conductive wire and the power roller are all coated with an insulating layer.

[0014] The advantages of the present invention are as follows: the piston rod of the telescopic device is controlled by a controller to drive the electrode to contact and connect with a plurality of pairs of contact terminals, thereby controlling the range of the magnetic force on the surface of the power roller to increase or decrease, making it easy to adjust the flow rate of the steel shots thrown out during adsorption, thereby realizing the flow control of shot blasting; at the same time, the angle of the guide plate is adjusted to control the shot blasting angle range; the magnetic attraction method is used to reduce the wear of the steel shots on the power roller, thereby relatively reducing the equipment maintenance cost and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 The structure of the present invention is schematically shown Figure 2 ; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 It is a partial structural schematic diagram of the present invention; Figure 5 It is a cross-sectional view of a part of the structure; Figure 6 for Figure 5 The enlarged view of point B in the middle; Figure 7 It is a schematic diagram of the structure of the power roller and the connecting shaft; Figure 8 It is a schematic diagram of the structure of the power roller, the connecting shaft and the rubber retaining ring; Fig. 9 for Figure 8 Sectional view at C in the middle; Fig.10 It is a schematic diagram of the structure of the contact terminal and the compression spring; Fig.11 It is a schematic diagram of the structure of the guide plate, the rotating shaft and the connecting plate.

[0016] In the figure: 1, housing, 1.1, front housing, 1.2, rear housing, 2, bearing, 3, end cover, 4, roller plate, 5, power roller, 5.1, connecting shaft, 5.2, through hole, 5.3, strip groove, 5.4, wiring groove, 5.5, annular groove, 5.6, slot, 5.61, limit stopper, 6, pulley, 7, drive motor, 8, bracket, 9, telescopic device, 10, electrode, 11, magnetic suction assembly, 11.1, magnetic strip assembly , 11.2, first wire, 11.3, second wire, 11.4, contact terminal, 11.41, block, 11.42, cylindrical groove, 11.5, compression spring, 11.6, rubber retaining ring, 12, wiring terminal, 13, controller, 14, guide plate, 15, feed pipe, 16, rotating shaft, 17, connecting plate, 17.1, strip through groove, 18, first bolt, 19, arc slide rail, 20, nut, 21, second bolt. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-11 The present invention provides a magnetic ejector technical solution: A magnetic projectile, comprising a housing 1, a bearing 2, an end cover 3, a roller plate 4, a power roller 5, a pulley 6, a drive motor 7 and a controller 13; the housing 1 is assembled from a front housing 1.1 and a rear housing 1.2, bearings 2 and end covers 3 are installed at both ends of the housing 1, roller plates 4 arranged opposite to each other are fixed to the inner rings of the two bearings 2, the power roller 5 is placed in the housing 1, connecting shafts 5.1 are fixed to both ends of the power roller 5, the two connecting shafts 5.1 are respectively fixed in two roller plates 4, one of which is connected to the other. One end of the connecting shaft 5.1 extends out of the shell 1 and is fixed with a pulley 6. The pulley 6 is rotatably connected to the driving motor 7 through a belt. A through hole 5.2 is coaxially provided on the power roller 5 and the connecting shaft 5.1. A magnetic attraction mechanism is arranged on the power roller 5, the connecting shaft 5.1 and the through hole 5.2. The magnetic attraction mechanism is electrically connected to the power supply and the controller 13 respectively. A guide plate 14 is rotatably arranged on the front shell 1.1. The upper end surface of the guide plate 14 is movably fitted with the surface of the power roller 5. A feed pipe 15 is installed on the rear shell 1.2.

[0019] The magnetic attraction mechanism includes a bracket 8, a telescopic device 9, an electrode 10, a magnetic attraction component 11 and a terminal 12; the bracket 8 is fixed on the end cover 3, and the telescopic device 9 is installed on the bracket 8. The telescopic device 9 is an electric push rod, an electric screw lift or a telescopic cylinder. An electrode 10 is fixed to one end of the piston rod of the telescopic device 9, and the electrode 10 is inserted into the through hole 5.2. A plurality of magnetic attraction components 11 are evenly arranged on the power roller 5. The electrode 10 and the contact terminal 11.4 of the magnetic attraction component 11 are in active contact to form a closed loop, so that the magnetic attraction component 11 generates magnetic force. The terminal 12 is installed on the bracket 8, one end of the terminal 12 is connected to the electrode 10, and the other end of the terminal 12 is connected to the power supply. The telescopic device 9 is electrically connected to the controller 13, and the controller 13 is installed on the housing 1.

[0020] The outer surface of the middle part of the power roller 5 is evenly provided with a plurality of pairs of strip grooves 5.3, and the two side end surfaces of the middle part of the power roller 5 are provided with a plurality of wiring grooves 5.4 corresponding to the strip grooves 5.3. The surface of the connecting shaft 5.1 is provided with an annular groove 5.5, and the annular groove 5.5 is provided with slots 5.6 corresponding to the number of the wiring grooves 5.4, and each slot 5.6 is fixed with a limit stopper 5.61; Each magnetic attraction assembly 11 includes a plurality of pairs of magnetic stripe assemblies 11.1, a first wire 11.2, a second wire 11.3, a contact terminal 11.4, a compression spring 11.5 and a rubber retaining ring 11.6; each pair of magnetic stripe assemblies 11.1 includes two metal magnetic stripes, and each pair of stripe slots 5.3 corresponds to a pair of magnetic stripe assemblies 11.1; the metal magnetic stripes are embedded in the stripe slots 5.3 one by one, and one end of the two metal magnetic stripes of each pair of magnetic stripe assemblies 11.1 is connected by the first wire 11.2, and the middle part of the first wire 11.2 is inserted into the through hole 5.2 and the corresponding slot 5 ... The other ends of the two metal magnetic strips 1.1 are connected to contact terminals 11.4 through second wires 11.3 respectively; the contact terminal 11.4 is elastically slidably arranged in the slot 5.6, one end of the contact terminal 11.4 is movably placed in the through hole 5.2 to movably contact with the surface of the electrode 10, a block 11.41 movably abutting against the limit stopper 5.61 is fixed on the contact terminal 11.4, the other end of the contact terminal 11.4 is fixed to one end of a compression spring 11.5, the other end of the compression spring 11.5 abuts against the inner surface of a rubber retaining ring 11.6, and the rubber retaining ring 11.6 is sleeved in the annular groove 5.5.

[0021] When the compression spring 11.5 is in the natural state, the lengths of the contact terminals 11.4 corresponding to the pairs of magnetic strip assemblies 11.1 extending into the through hole 5.2 are inconsistent, and the electrode 10 is a truncated cone. When the electrode 10 moves, the more contact terminals 11.4 contacted, the larger the magnetic force range generated by the magnetic attraction mechanism, and thus the more steel shots adsorbed. That is, by moving the electrode 10, the flow rate of the steel shots thrown out during adsorption can be adjusted to achieve flow control of shot blasting, while reducing the wear of the steel shots on the power roller 5.

[0022] A rotating shaft 16 is rotatably arranged on the front housing 1.1, and a plurality of connecting plates 17 are fixed on the rotating shaft 16. Two strip-shaped through grooves 17.1 are symmetrically arranged on each connecting plate 17. The strip-shaped through grooves 17.1 are provided with threaded holes corresponding to the strip-shaped through grooves 17.1. The first bolt 18 can slide in the strip-shaped through grooves 17.1 to adjust the upper and lower positions of the guide plate 14 relative to the rotating shaft 16, so as to ensure that the upper end surface of the guide plate 14 is aligned with the power after the angle of the guide plate 14 is adjusted. The surface of the roller 5 is movably fitted; the first bolt 18 passes through the strip groove 17.1 and is threadedly connected to the threaded hole to fix and clamp the connecting plate 17 and the guide plate 14. An arc-shaped slide rail 19 is installed on one side of the front shell 1.1. A nut 20 is slidably arranged in the arc-shaped slide rail 19. The nut 20 is threadedly connected with a second bolt 21. The end of the second bolt 21 abuts against the end face of the guide plate 14 for clamping and fixing, thereby realizing the angle adjustment of the guide plate 14 and controlling the projection angle range of the steel shot.

[0023] The two opposite lower surfaces of the two roller plates 4 are in contact with the two end surfaces of the power roller 5 respectively.

[0024] One end of the contact terminal 11.4 is provided with two cylindrical grooves 11.42, and one end of the compression spring 11.5 is fixed in the cylindrical groove 11.42.

[0025] The contact surfaces of the magnetic strip assembly 11.1, the first conductive wire 11.2, the second conductive wire 11.3 and the power roller 5 are all coated with an insulating layer.

[0026] Working principle of the present invention: After the device is powered on, according to the requirements of the treatment process, the controller 13 is used to control the piston rod of the telescopic device 9 to drive the electrode 10 to move a distance in the through hole 5.2, thereby controlling the number of contact terminals 11.4 in contact with the electrode 10. After contact, a closed loop is formed, and the metal magnetic strip generates magnetic force. By feeding steel pellets into the feed pipe 15, as the drive motor 7 rotates, the power roller 5 is rotated synchronously by the belt. While the power roller 5 rotates, the metal magnetic strip is used to absorb the steel pellets and also rotate at a high speed. Under the dual effects of centrifugal force and the guide plate 14, the adsorbed steel pellets can only be thrown above the guide plate 14. By adjusting the angle of the guide plate 14, the angle range of the steel pellets is controlled, so that the steel pellets are projected onto the metal surface to perform the shot blasting process.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic projectile, characterized in that: The invention comprises a housing (1), a bearing (2), an end cover (3), a roller pressure plate (4), a power roller (5), a pulley (6), a drive motor (7) and a controller (13); the housing (1) is assembled from a front housing (1.1) and a rear housing (1.2); bearings (2) and end covers (3) are installed at both ends of the housing (1); roller pressure plates (4) arranged opposite to each other are fixed to the inner rings of the two bearings (2); the power roller (5) is placed in the housing (1); connecting shafts (5.1) are fixed to both ends of the power roller (5); the two connecting shafts (5.1) are fixed to the two roller pressure plates (4) respectively, and one of the connecting shafts (5.1) is fixed to the two roller pressure plates (4) respectively. One end of the connecting shaft (5.1) extends out of the housing (1) and is fixed with a pulley (6), the pulley (6) is rotatably connected to the driving motor (7) via a belt, a through hole (5.2) is coaxially provided on the power roller (5) and the connecting shaft (5.1), a magnetic attraction mechanism is arranged on the power roller (5), the connecting shaft (5.1) and the through hole (5.2), the magnetic attraction mechanism is electrically connected to a power source and a controller (13) respectively, a guide plate (14) is rotatably arranged on the front housing (1.1), the upper end surface of the guide plate (14) is movably fitted with the surface of the power roller (5), and a feed pipe (15) is installed on the rear housing (1.2).

2. A magnetic projectile according to claim 1, characterized in that: The magnetic attraction mechanism comprises a bracket (8), a telescopic device (9), an electrode (10), a magnetic attraction component (11) and a terminal (12); the bracket (8) is fixed on the end cover (3), the telescopic device (9) is installed on the bracket (8), one end of the piston rod of the telescopic device (9) is fixed with an electrode (10), the electrode (10) is inserted into the through hole (5.2), a plurality of magnetic attraction components (11) are evenly arranged on the power roller (5), the electrode (10) and the contact terminal (11.4) of the magnetic attraction component (11) are in movable contact to form a closed circuit, so that the magnetic attraction component (11) generates magnetic force, the terminal (12) is installed on the bracket (8), one end of the terminal (12) is connected to the electrode (10), and the other end of the terminal (12) is connected to a power source, the telescopic device (9) and the controller (13) are electrically connected, and the controller (13) is installed on the housing (1).

3. A magnetic projectile according to claim 2, characterized in that: The telescopic device (9) is an electric push rod, an electric screw lift or a telescopic cylinder.

4. A magnetic projectile according to claim 2, characterized in that: A plurality of pairs of strip grooves (5.3) are evenly formed on the outer surface of the middle of the power roller (5), a plurality of wiring grooves (5.4) corresponding to and connected to the strip grooves (5.3) are formed on both side end surfaces of the middle of the power roller (5), an annular groove (5.5) is formed on the surface of the connecting shaft (5.1), and slots (5.6) corresponding in number to the number of the wiring grooves (5.4) are formed on the annular groove (5.5), and a limit stopper (5.61) is fixed in each slot (5.6); Each magnetic attraction assembly (11) comprises a plurality of pairs of magnetic stripe assemblies (11.1), a first wire (11.2), a second wire (11.3), a contact terminal (11.4), a compression spring (11.5) and a rubber retaining ring (11.6); each pair of magnetic stripe assemblies (11.1) comprises two metal magnetic stripes, and each pair of stripe slots (5.3) corresponds to a pair of magnetic stripe assemblies (11.1); the metal magnetic stripes are embedded in the stripe slots (5.3) one by one, one end of the two metal magnetic stripes of each pair of magnetic stripe assemblies (11.1) is connected by a first wire (11.2), and the middle of the first wire (11.2) is inserted into the through hole (5.2) and the corresponding slot (5.6); each pair of magnetic stripe assemblies (1 The other ends of the two metal magnetic strips of 1.1 are respectively connected to contact terminals (11.4) through second wires (11.3); the contact terminal (11.4) is elastically slidably arranged in the slot (5.6); one end of the contact terminal (11.4) is movably placed in the through hole (5.2) to movably contact with the surface of the electrode (10); a clamping block (11.41) movably abutting against a limit stopper (5.61) is fixed on the contact terminal (11.4); the other end of the contact terminal (11.4) is fixed to one end of a compression spring (11.5); the other end of the compression spring (11.5) abuts against the inner surface of a rubber retaining ring (11.6); and the rubber retaining ring (11.6) is sleeved in the annular groove (5.5).

5. A magnetic projectile according to claim 4, characterized in that: When the compression spring (11.5) is in a natural state, the contact terminals (11.4) corresponding to the pairs of magnetic stripe assemblies (11.1) have different lengths extending into the through holes (5.2), and the electrodes (10) are truncated cone-shaped.

6. A magnetic projectile according to claim 1, characterized in that: A rotating shaft (16) is rotatably arranged on the front housing (1.1), and a plurality of connecting plates (17) are fixed on the rotating shaft (16). Two strip-shaped through grooves (17.1) are symmetrically arranged on each connecting plate (17), and threaded holes corresponding to the strip-shaped through grooves (17.1) are arranged on the strip-shaped through grooves (17.1). A first bolt (18) can slide in the strip-shaped through grooves (17.1), and the first bolt (18) passes through the strip-shaped through grooves (17.1) and is threadedly connected to the threaded holes, thereby fixing and clamping the connecting plate (17) and the guide plate (14). An arc-shaped slide rail (19) is installed on one side of the front housing (1.1), and a nut (20) is slidably arranged in the arc-shaped slide rail (19). The nut (20) is threadedly connected to a second bolt (21), and an end of the second bolt (21) abuts against an end surface of the guide plate (14) for clamping and fixing, thereby realizing angle adjustment of the guide plate (14).

7. A magnetic projectile according to claim 1, characterized in that: The two opposite lower surfaces of the two roller plates (4) are respectively in contact with the two end surfaces of the power roller (5).

8. A magnetic projectile according to claim 5, characterized in that: One end of the contact terminal (11.4) is provided with two cylindrical grooves (11.42), and one end of the compression spring (11.5) is fixed in the cylindrical groove (11.42).

9. A magnetic projectile according to claim 4, characterized in that: The contact surfaces of the magnetic strip assembly (11.1), the first conductive wire (11.2), the second conductive wire (11.3) and the power roller (5) are all coated with an insulating layer.

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