Vibrating screen

Abstract

The utility model discloses a vibrating screen which comprises a first-stage vibrating screen, a second-stage vibrating screen is installed on one side of the first-stage vibrating screen, screen frames are installed in screen drums of the first-stage vibrating screen and the second-stage vibrating screen, and an ultrasonic vibrator is installed on the lower side of each screen frame. The ultrasonic vibrating screen has the beneficial effects that the ultrasonic vibrators are externally arranged on the outer sides of the first-stage vibrating screen and the second-stage vibrating screen, and the temperature sensing alarm mechanism is arranged at the ultrasonic transduction head at one end of each ultrasonic vibrator by virtue of the clamping mechanism; a bimetal temperature sensing contact piece in the temperature sensing alarm mechanism is bent and deformed after being heated and is in contact with a conductive iron sheet, so that a circuit of the audible and visual alarm is switched on, the audible and visual alarm gives an alarm to remind a worker of blockage in the screen frame, the worker can conveniently clean the screen frame in time, and the screening efficiency of the vibrating screen on metal powder is ensured.

Description

Technical Field

[0001] The utility model relates to the field of metal powder screening, in particular to a vibrating screen. Background Art

[0002] In the process of metal powder processing, in order to separate qualified powder from the metal powder, it is often necessary to use a vibrating screen to screen the processed metal powder.

[0003] At present, metal powders are mainly screened by means of an ultrasonic vibrating screen with a built-in vibrator. Although the metal powders can be screened under the action of the ultrasonic vibrating screen with the above structure, and the metal powders blocked in the mesh holes on the screen frame can be vibrated out with the help of the vibrator, as the amount of metal powder screened increases, the mesh holes on the screen frame will be blocked even under the action of the ultrasonic vibrator. After the mesh holes on the screen frame are blocked, the temperature of the ultrasonic vibrator on the screen frame will continue to rise. At this time, due to the built-in ultrasonic vibrator, the blockage of the screen frame cannot be known to external staff in time, so that the vibration screen often leads to a relatively low overall screening efficiency of the metal powder due to untimely cleaning of the screen frame during use. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a vibrating screen which, in view of the current status of the prior art, provides a vibrating screen which, by placing an ultrasonic vibrator externally and using a temperature sensing alarm mechanism on an ultrasonic transducer head at one end of the ultrasonic vibrator, can give a timely alarm when the screen frame is blocked, thereby facilitating the staff to quickly clean the screen frame.

[0005] The utility model is realized by the following technical scheme: the utility model proposes a vibrating screen, comprising a first-level vibrating screen, a second-level vibrating screen is installed on one side of the first-level vibrating screen, screen frames are installed in the screen cylinders of the first-level vibrating screen and the second-level vibrating screen, an ultrasonic vibrator is installed on the lower side of each of the screen frames, the corresponding ultrasonic vibrators are respectively extended from the first-level vibrating screen and the second-level vibrating screen, an ultrasonic transducer is also installed on the exposed end of the ultrasonic vibrator, an ultrasonic transducer head is connected to an ultrasonic controller on one side of the ultrasonic transducer head through a wire, a clamping mechanism is installed outside the ultrasonic transducer head, a temperature sensing alarm mechanism is installed on the clamping mechanism, wherein the clamping mechanism comprises a fixed splint, a mounting plate welded on the upper and lower sides of a side wall of the fixed splint, a screw rod installed in the middle of the mounting plate, a hand wheel installed at the bottom end of the screw rod, a slide groove opened in the middle of one side wall of the fixed splint and a movable splint running through the slide groove, and the temperature sensing alarm mechanism comprises a built-in power supply type sound and light alarm installed in the middle of the upper end of the fixed splint, a conductive iron sheet installed on the upper part of one side wall of the fixed splint, and a bimetallic temperature sensing contact piece installed below the conductive iron sheet.

[0006] By adopting the above technical scheme, when the mesh holes in the sieve frame are clogged with metal powder during the screening process, the ultrasonic vibrator transfers the temperature of the sieve frame to the ultrasonic transducer head. After the ultrasonic transducer head is heated up, the bimetallic temperature sensing contact piece in the temperature sensing alarm mechanism will be heated up, so that the bimetallic temperature sensing contact piece will bend and deform toward the side of the conductive iron sheet and contact the conductive iron sheet, thereby connecting the circuit of the sound and light alarm and causing the sound and light alarm to sound an alarm to remind the staff that the sieve frame is clogged, making it convenient for the staff to clean the sieve frame in time.

[0007] Furthermore, the bottom end of the first-stage vibrating screen is also connected to a support via bolts, and the bottom end surface of the support is flush with the bottom end surface of the second-stage vibrating screen.

[0008] By adopting the above technical solution, it can be ensured that the first-stage vibrating screen and the second-stage vibrating screen can screen the metal powder step by step.

[0009] Furthermore, a discharge pipe 1 is installed on the lower side of each screen frame on the first-level vibrating screen, and a discharge pipe 2 is installed at the discharge port on the lower side of the outer wall of the screen cylinder of the first-level vibrating screen.

[0010] By adopting the above technical solution, the discharge pipe 1 is mainly used to discharge the coarse metal powder after screening on the first-level vibrating screen, while the discharge pipe 2 is mainly used to discharge the qualified metal powder after screening.

[0011] Furthermore, a discharge pipe three is installed on the secondary vibration screen at the lower side of the screen frame, and a discharge pipe four is installed at the discharge port on the lower side of the outer wall of the secondary vibration screen.

[0012] By adopting the above technical solution, the discharge pipe three is mainly used to discharge the coarse metal powder after screening on the secondary vibration screen, and the discharge pipe four is mainly used to discharge the qualified metal powder after screening on the secondary vibration screen.

[0013] Furthermore, the fixed clamping plate and the movable clamping plate are both in contact with the ultrasonic transducer head at positions that are arc-shaped groove structures, and the movable clamping plate is slidably connected to the sliding groove.

[0014] By adopting the above technical solution, it can be ensured that the fixed clamp and the movable clamp are fully fitted on the surface of the ultrasonic transducer head.

[0015] Furthermore, the screw rod passes through the movable clamping plate and is threadedly connected to the movable clamping plate, and the screw rod is rotationally connected to the mounting plate.

[0016] By adopting the above technical solution, the screw rod can be conveniently rotated relative to the mounting plate with the help of the hand wheel.

[0017] Furthermore, the conductive iron sheet and the bimetallic temperature-sensing contact piece are both connected to the fixed clamping plate by insulating glue, and the conductive iron sheet and the bimetallic temperature-sensing contact piece are both electrically connected to the sound and light alarm.

[0018] By adopting the above technical solution, when the conductive iron sheet contacts the bimetallic temperature-sensitive contact piece, the sound and light alarm circuit is connected, thereby making the sound and light alarm work.

[0019] Furthermore, the bimetallic temperature-sensing contact piece is a copper-iron bimetallic contact piece, wherein the portion in contact with the outer wall of the ultrasonic transducer head is a copper sheet.

[0020] By adopting the above technical solution, the thermal expansion coefficient of the copper sheet is greater than that of the iron sheet. After heating, the deformation amplitude of the copper sheet is greater than that of the iron sheet, which will cause the bimetallic temperature sensing contact piece to bend and deform toward the side of the conductive iron sheet, thereby ensuring that the bimetallic temperature sensing contact piece can connect the sound and light alarm circuit when the ultrasonic transducer head heats up after being blocked by the screen frame.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model arranges an ultrasonic vibrator externally on the outside of a primary vibration screen and a secondary vibration screen, and installs a temperature sensing alarm mechanism at the ultrasonic transducer head at one end of the ultrasonic vibrator by means of a clamping mechanism. When the mesh in the screen frame is clogged, the bimetallic temperature sensing contact piece in the temperature sensing alarm mechanism is heated up and bent and deformed and contacts the conductive iron sheet, thereby connecting the circuit of the sound and light alarm and causing the sound and light alarm to sound an alarm, so as to remind the staff that the screen frame is clogged, facilitate the staff to clean the screen frame in time, and ensure the screening efficiency of the vibration screen for metal powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a vibrating screen described in the utility model;

[0024] Figure 2 This is a main sectional view of a vibrating screen described in the utility model;

[0025] Figure 3 It is a top view of a vibrating screen described in the utility model;

[0026] Figure 4 It is a structural schematic diagram of a clamping mechanism and a temperature sensing alarm mechanism in a vibrating screen described in the utility model;

[0027] Figure 5 The utility model is a kind of vibrating screen Figure 1 Enlarged view of point A in the middle.

[0028] The following are the descriptions of the reference numerals:

[0029] 1. First-stage vibrating screen; 2. Discharge pipe one; 3. Temperature sensing alarm mechanism; 301. Bimetallic temperature sensing contact piece; 302. Conductive iron sheet; 303. Sound and light alarm; 4. Second-stage vibrating screen; 5. Discharge pipe three; 6. Clamping mechanism; 601. Fixed splint; 602. Mounting plate; 603. Screw; 604. Hand wheel; 605. Slide; 606. Movable splint; 7. Support; 8. Ultrasonic vibrator; 9. Ultrasonic transducer head; 10. Ultrasonic controller; 11. Screen frame; 12. Discharge pipe four; 13. Discharge pipe two. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] like Figure 1-Figure 3 As shown, a vibrating screen in this embodiment includes a first-level vibrating screen 1, a second-level vibrating screen 4 is installed on one side of the first-level vibrating screen 1, screen frames 11 are installed in the screen cylinders of the first-level vibrating screen 1 and the second-level vibrating screen 4, an ultrasonic vibrator 8 is installed on the lower side of each screen frame 11, and the corresponding ultrasonic vibrators 8 extend out from the first-level vibrating screen 1 and the second-level vibrating screen 4 respectively, an ultrasonic transducer 9 is also installed on the exposed end of the ultrasonic vibrator 8, an ultrasonic transducer 9 is connected to an ultrasonic controller 10 on one side through a wire, a clamping mechanism 6 is installed outside the ultrasonic transducer 9, and a temperature sensing alarm mechanism 3 is installed on the clamping mechanism 6, wherein the clamping mechanism 6 includes a fixed clamping plate 601, a mounting plate 602 welded to the upper and lower sides of one side wall of the fixed clamping plate 601, a screw 603 installed in the middle of the mounting plate 602, and a handwheel 604 installed at the bottom end of the screw 603. A slide groove 605 is provided in the middle of one side wall of the fixed splint 601 and a movable splint 606 passes through the slide groove 605. The temperature sensing alarm mechanism 3 includes a built-in power supply type sound and light alarm 303 installed in the middle of the upper end of the fixed splint 601, a conductive iron sheet 302 installed on the upper part of one side wall of the fixed splint 601, and a bimetallic temperature sensing contact 301 installed below the conductive iron sheet 302. With the help of a hand wheel 604, the screw 603 can be easily rotated relative to the mounting plate 602. The conductive iron sheet 302 and the bimetallic temperature sensing contact 301 are both connected to the fixed splint 601 by insulating glue. The conductive iron sheet 302 and the bimetallic temperature sensing contact 301 are both electrically connected to the sound and light alarm 303. When the conductive iron sheet 302 contacts the bimetallic temperature sensing contact 301, the circuit of the sound and light alarm 303 is connected, thereby making the sound and light alarm 303 work.

[0032] Among them, when the mesh holes in the sieve frame 11 are clogged with metal powder during the screening process, the ultrasonic vibrator 8 transfers the temperature of the sieve frame 11 to the ultrasonic transducer head 9. After the ultrasonic transducer head 9 is heated up, the bimetallic temperature sensing contact 301 in the temperature sensing alarm mechanism 3 will be heated up, so that the bimetallic temperature sensing contact 301 is bent and deformed toward the side of the conductive iron sheet 302 and contacts the conductive iron sheet 302, thereby connecting the circuit of the sound and light alarm 303 and causing the sound and light alarm 303 to sound an alarm to remind the staff that the sieve frame 11 is clogged, making it convenient for the staff to clean the sieve frame 11 in time.

[0033] like Figure 1-Figure 3 As shown, in this embodiment, the bottom end of the first-stage vibrating screen 1 is also connected to a support 7 by bolts, and the bottom end surface of the support 7 is flush with the bottom end surface of the second-stage vibrating screen 4, which can ensure the step-by-step screening of the metal powder by the first-stage vibrating screen 1 and the second-stage vibrating screen 4. A discharge pipe 2 is installed on the first-stage vibrating screen 1 at the lower side of each screen frame 11, and a discharge pipe 2 13 is installed at the discharge port on the lower side of the outer wall of the screen cylinder of the first-stage vibrating screen 1. The discharge pipe 2 is mainly used to discharge the coarse metal powder screened on the first-stage vibrating screen 1, and the discharge pipe 2 13 is mainly used to discharge the qualified metal powder after screening. A discharge pipe 3 5 is installed on the second-stage vibrating screen 4 at the lower side of the screen frame 11, and a discharge pipe 4 12 is installed at the discharge port on the lower side of the outer wall of the second-stage vibrating screen 4. The discharge pipe 3 5 is mainly used to discharge the coarse metal powder screened on the second-stage vibrating screen 4, and the discharge pipe 4 12 is mainly used to discharge the qualified metal powder screened on the second-stage vibrating screen 4.

[0034] like Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, the contact parts of the fixed splint 601 and the movable splint 606 with the ultrasonic transducer head 9 are both arc-shaped groove structures, and the movable splint 606 is slidably connected with the slide groove 605, which can ensure that the fixed splint 601 and the movable splint 606 are fully fitted on the surface of the ultrasonic transducer head 9, the screw 603 passes through the movable splint 606 and is threadedly connected to the movable splint 606, and the screw 603 is rotatably connected to the mounting plate 602.

[0035] like Figure 4 and Figure 5 As shown, in this embodiment, the bimetallic temperature sensing contact piece 301 is a copper-iron bimetallic contact piece, wherein the portion in contact with the outer wall of the ultrasonic transducer head 9 is a copper sheet, and the thermal expansion coefficient of the copper sheet is greater than that of the iron sheet. After heating, the deformation amplitude of the copper sheet is greater than that of the iron sheet, which will cause the bimetallic temperature sensing contact piece 301 to bend and deform toward the side of the conductive iron sheet 302, thereby ensuring that the bimetallic temperature sensing contact piece 301 can connect the circuit of the sound and light alarm 303 when the ultrasonic transducer head 9 heats up after being blocked by the screen frame 11.

[0036] The specific implementation process of this embodiment is as follows: when it is necessary to screen the metal powder after production, it is only necessary to connect the feed port on the first-level vibrating screen 1 with the discharge port of the metal powder production equipment, and start the first-level vibrating screen 1, the second-level vibrating screen 4 and each ultrasonic controller 10, so that the metal powder can be fully screened under the double screening of the first-level vibrating screen 1 and the re-screening of the second-level vibrating screen 4. When the mesh in the screen frame 11 is blocked by metal powder during the screening process, the ultrasonic vibrator 8 transfers the temperature of the screen frame 11 to the ultrasonic transducer head 9. After the ultrasonic transducer head 9 is heated, the bimetallic temperature-sensing contact piece 301 in the temperature-sensing alarm mechanism 3 will be heated, so that the bimetallic temperature-sensing contact piece 301 is bent and deformed toward the side of the conductive iron sheet 302 and contacts the conductive iron sheet 302, thereby connecting the circuit of the sound and light alarm 303, and causing the sound and light alarm 303 to sound an alarm to remind the staff that the screen frame 11 is blocked, so that the staff can clean the screen frame 11 in time.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vibrating screen, characterized in that: The invention comprises a primary vibrating screen (1), a secondary vibrating screen (4) is installed on one side of the primary vibrating screen (1), a screen frame (11) is installed in the screen cylinder of the primary vibrating screen (1) and the secondary vibrating screen (4), an ultrasonic vibrator (8) is installed on the lower side of each of the screen frames (11), the corresponding ultrasonic vibrators (8) are respectively extended from the primary vibrating screen (1) and the secondary vibrating screen (4), an ultrasonic transducer (9) is also installed on the exposed end of the ultrasonic vibrator (8), one side of the ultrasonic transducer (9) is connected to an ultrasonic controller (10) via a wire, a clamping mechanism (6) is installed outside the ultrasonic transducer (9), a temperature sensing alarm mechanism (3) is installed on the clamping mechanism (6), wherein the clamping mechanism ( 6) comprises a fixed clamping plate (601), a mounting plate (602) welded to the upper and lower sides of a side wall of the fixed clamping plate (601), a screw (603) mounted in the middle of the mounting plate (602), a hand wheel (604) mounted at the bottom end of the screw (603), a slide groove (605) opened in the middle of one side wall of the fixed clamping plate (601), and a movable clamping plate (606) passing through the slide groove (605), the temperature sensing alarm mechanism (3) comprises a built-in power supply type sound and light alarm (303) mounted in the middle of the upper end of the fixed clamping plate (601), a conductive iron sheet (302) mounted on the upper part of one side wall of the fixed clamping plate (601), and a bimetallic temperature sensing contact (301) mounted below the conductive iron sheet (302).

2. A vibrating screen according to claim 1, characterized in that: The bottom end of the first-stage vibrating screen (1) is also connected to a support (7) via bolts, and the bottom end surface of the support (7) is flush with the bottom end surface of the second-stage vibrating screen (4).

3. A vibrating screen according to claim 1, characterized in that: A discharge pipe 1 (2) is installed on the lower side of each screen frame (11) on the first-stage vibrating screen (1), and a discharge pipe 2 (13) is installed at the discharge opening on the lower side of the outer wall of the screen drum of the first-stage vibrating screen (1).

4. A vibrating screen according to claim 1, characterized in that: A discharge pipe three (5) is installed on the secondary vibration screen (4) at the lower side of the screen frame (11), and a discharge pipe four (12) is installed at the discharge opening on the lower side of the outer wall of the secondary vibration screen (4).

5. A vibrating screen according to claim 1, characterized in that: The contact portions of the fixed clamping plate (601) and the movable clamping plate (606) with the ultrasonic transducer head (9) are both arc-shaped groove structures, and the movable clamping plate (606) is slidably connected to the sliding groove (605).

6. A vibrating screen according to claim 1, characterized in that: The screw rod (603) passes through the movable clamping plate (606) and is threadedly connected to the movable clamping plate (606), and the screw rod (603) is rotationally connected to the mounting plate (602).

7. A vibrating screen according to claim 1, characterized in that: The conductive iron sheet (302) and the bimetallic temperature-sensing contact sheet (301) are both connected to the fixed clamping plate (601) via insulating glue, and the conductive iron sheet (302) and the bimetallic temperature-sensing contact sheet (301) are both electrically connected to the sound and light alarm (303).

8. A vibrating screen according to claim 1, characterized in that: The bimetallic temperature-sensing contact piece (301) is a copper-iron bimetallic contact piece, wherein the portion in contact with the outer wall of the ultrasonic transducer head (9) is a copper sheet.

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