An ultrasonic vibrating screening device

Abstract

This utility model belongs to the technical field of screening devices, specifically relating to an ultrasonic vibration screening device, including an ultrasonic transducer, a base, a bottom screen, and an upper screen. Both the bottom screen and the upper screen include a screen frame and an annular disc. The annular discs on the upper side of the bottom screen and the upper screen include a locking mechanism, and the annular disc on the lower side of the upper screen includes a limiting mechanism. The locking mechanism includes: a sliding rod; a pressure block, which is fixed to the top of the sliding rod; the limiting mechanism includes: a locking groove, which is composed of an open groove and a V-shaped groove; a sleeve, with an opening at the lower end of the sleeve; and an elastic connector, which elastically connects the sleeve and the annular disc. This utility model achieves rapid fixing between the bottom screen and the upper screen, as well as between two adjacent upper screens, without the need for multiple locking operations, simplifying the operation of the device during assembly.

Description

Technical Field

[0001] This utility model belongs to the technical field of screening devices, specifically relating to an ultrasonic vibration screening device. Background Technology

[0002] Ultrasonic vibrating screens are a common type of vibrating screen, typically used for screening powders (such as flour). The main principle is to use an ultrasonic transducer to convert high-frequency electrical energy into mechanical energy, thereby causing the screen to vibrate at high frequency. The powder on the screen receives a huge ultrasonic acceleration, keeping the powder on the screen surface in a suspended state, thus suppressing factors such as adhesion, friction, settling, and screen clogging.

[0003] In existing ultrasonic vibrating screens, the assembly of multiple screens often involves fixing adjacent screens with bolts or locks, which requires multiple operations and is inconvenient. To address this, we propose an ultrasonic vibrating screen device to optimize the screen fixing method of existing ultrasonic vibrating screens and improve assembly efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an ultrasonic vibration screening device to solve the problems existing in the background art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows: An ultrasonic vibration screening device includes an ultrasonic transducer, a base, a bottom screen, and at least one upper screen. The base is fixed to a support platform by a spring. The bottom screen is fixed to the support platform. Both the bottom screen and the upper screen include a screen frame and annular discs disposed on the upper and lower sides of the screen frame. The annular discs on the upper side of the bottom screen and on the upper side of each upper screen also include multiple locking mechanisms. The annular discs on the lower side of each upper screen also include multiple limiting mechanisms corresponding to the locking mechanisms. Each of the aforementioned latching mechanisms includes: A sliding rod is vertically disposed on the annular disk, the upward extension height of the sliding rod matches the total thickness of the two annular disks, and the sliding rod and the annular disk are slidably connected along the radial direction of the screen frame; A pressure block, which is fixedly connected to the top of the slide rod, and the top of the pressure block is a wedge-shaped inclined surface; Each of the aforementioned limiting mechanisms includes: A snap-fit ​​groove is formed through the annular disk and matches the slide rod. The snap-fit ​​groove is composed of an open groove and a V-shaped groove. One end of the open groove passes through the edge of the annular disk, and the other end of the open groove is connected to the V-shaped groove. A sleeve, the lower end of which has an opening corresponding to the slide rod, and the sleeve is located above the end of the V-shaped groove that is away from the opening groove; An elastic connector is used to elastically connect the sleeve and the annular disc.

[0006] As a further limitation of the technical solution of this utility model, each of the aforementioned snap-fit ​​mechanisms also includes: A guide rail is disposed at the bottom of the annular disk and extends along the radial direction of the screen frame; A first positioning rod is fixed inside the guide rail along the extension direction of the guide rail; The lower end of the slide bar is inserted into the guide rail and slidably connected to the first positioning rod.

[0007] As a further limitation of the technical solution of this utility model, each of the elastic connecting members includes: A connecting plate, which is fixedly connected to the top of the sleeve; A connecting spring is used to elastically fix the ring disc and the connecting plate together.

[0008] As a further limitation of the present invention, the elastic connector further includes a second positioning rod, which passes through the connecting plate and is sleeved inside the connecting spring. The two ends of the second positioning rod are respectively fixedly connected to the ring discs on the upper and lower sides of the upper screen.

[0009] As a further limitation of the technical solution of this utility model, each of the screen frames is provided with a discharge channel, and each of the upper screens is equipped with a discharge door that can be manually opened and closed.

[0010] As a further limitation of the present invention, the screening device also includes an upper cover, the upper cover being provided with a feeding channel, and the feeding channel being provided with a cover.

[0011] As a further limitation of the present invention, each of the upper screens has a filter screen installed at the bottom of the screen frame, and the filter screen protrudes upward in the middle to form a conical structure. The bottom screen does not have a filter screen at the bottom of the screen frame and the middle of the bottom screen protrudes upward to form a conical structure.

[0012] During assembly of the screening device of this utility model, the opening slot of the locking groove is inserted from below the pressure block. Then, the screen frame is rotated, causing the sliding rod to enter the V-shaped groove through the opening slot. Guided by the V-shaped groove, the sliding rod can slide back and forth radially along the screen frame once. As the screen frame rotates, the sliding rod moves to the end of the V-shaped groove away from the opening slot. In this way, under the action of the pressure block, the two annular discs are limited and no longer loosen up and down. At the same time, because the top of the pressure block is a wedge-shaped inclined surface, when the pressure block passes through the V-shaped groove... After the groove moves toward the sleeve, the wedge-shaped inclined surface of the pressure block can first overcome the elastic force of the elastic connector and push the sleeve upward until the pressure block is at the end of the V-shaped groove away from the opening groove. Since the lower end of the sleeve is the opening corresponding to the slide rod, the elastic connector will elastically rebound and lock the pressure block in place through the sleeve. In this way, the slide rod can no longer move, thereby realizing the quick fixing between the bottom screen and the upper screen and between two adjacent upper screens without the need for multiple locking, which simplifies the operation of the device during assembly. Attached Figure Description

[0013] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model after assembly of a bottom screen and an upper screen; Figure 2 This is a schematic diagram of the bottom screen and upper screen of this utility model before assembly; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A; Figure 4 This is a schematic diagram of the structure of the bottom screen and the upper screen after assembly. Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B; Figure 6 This is a schematic diagram of the structure of this utility model after assembly of one bottom screen and two upper screens; The symbols for the main components are explained below: Base 100, bottom screen 101, upper screen 102, support platform 103, screen frame 110, ring plate 111, discharge channel 112, snap-fit ​​mechanism 120, slide bar 121, pressure block 122, guide rail 123, first positioning rod 124, limiting mechanism 130, snap-fit ​​groove 131, opening groove 1311, V-groove 1312, sleeve 132, elastic connector 133, connecting plate 1331, connecting spring 1332, second positioning rod 1333, top cover 140, feed channel 141, sealing cover 142, filter screen 150. Detailed Implementation

[0015] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] Example 1, such as Figures 1 to 6 An ultrasonic vibration screening device is shown, including an ultrasonic transducer, a base 100, a bottom screen 101 and at least one upper screen 102. The base 100 is fixed to a support platform 103 by a spring. The bottom screen 101 is fixed to the support platform 103. Both the bottom screen 101 and the upper screen 102 include a screen frame 110 and annular discs 111 disposed on the upper and lower sides of the screen frame 110. The annular discs 111 on the upper side of the bottom screen 101 and the upper side of each upper screen 102 also include multiple locking mechanisms 120. The annular discs 111 on the lower side of each upper screen 102 also include multiple limiting mechanisms 130 corresponding to the locking mechanisms 120. As will be understood by those skilled in the art, after the base 100, bottom screen 101 and upper screen 102 are combined, high-frequency electrical energy is converted into mechanical energy by an ultrasonic transducer, causing the screening device to vibrate at high frequency, thereby enabling efficient screening and screen cleaning of powder. At the same time, the multiple upper screens are arranged with the upper screen with smaller screen apertures on top and the upper screen with larger screen apertures on the bottom, so that the screening of powder can be achieved step by step.

[0017] Each card receiving mechanism 120 includes: The slide rod 121 is vertically arranged on the ring disk 111. The upward extension height of the slide rod 121 matches the total thickness of the two ring disks 111, and the slide rod 121 and the ring disk 111 are slidably connected along the radial direction of the screen frame 110. Pressure block 122 is fixedly connected to the top of slide bar 121, and the top of pressure block 122 is a wedge-shaped inclined surface; Each limit mechanism 130 includes: The snap-fit ​​groove 131 is formed through the ring plate 111 and matches the slide bar 121. The snap-fit ​​groove 131 is composed of an open groove 1311 and a V-shaped groove 1312. One end of the open groove 1311 passes through the edge of the ring plate 111, and the other end of the open groove 1311 is connected to the V-shaped groove 1312. Sleeve 132, the lower end of sleeve 132 has an opening corresponding to slide bar 121, and sleeve 132 is located above the end of V-groove 1312 away from the opening groove 1311; The elastic connector 133 is used to elastically connect the sleeve 132 and the ring disc 111.

[0018] The improvement of this utility model lies in optimizing the connection structure between the bottom screen 101 and the upper screen 102, as well as between two adjacent upper screens 102. The traditional connection structure uses bolts or lock bolts, which requires multiple locking and fixing during the fixing process, making the operation cumbersome. Therefore, this utility model has made a technical optimization for this purpose.

[0019] Before assembly, adjust the snap-fit ​​mechanism 120 as follows: Figure 2 As shown, the sliding rod 121 and the pressure block 122 are positioned on the edge of the ring disc 111 by sliding the sliding rod 121, while the limiting mechanism 130 is as follows: Figure 2 As shown, under the action of the elastic connector 133, the sleeve 132 is pulled downward toward the ring disc 111; During assembly, the opening 1311 of the snap-fit ​​groove 131 is inserted under the pressure block 122. Then, the screen frame 110 is rotated, causing the slide rod 121 to enter the V-shaped groove 1312 through the opening 1311. Guided by the V-shaped groove 1312, the slide rod 121 can slide back and forth radially along the screen frame 110. As the screen frame 110 rotates, the slide rod 121 moves to the end of the V-shaped groove 1312 away from the opening 1311. In this way, under the action of the pressure block 122, the two ring discs 111 are limited and no longer loosen up and down. At the same time, since the top of the pressure block 122 is a wedge-shaped inclined surface, the direction of the wedge-shaped inclined surface is as follows: Figure 2 As shown, the direction towards the sleeve 132 is such that after the pressure block 122 moves towards the sleeve 132 through the V-groove 1312, the wedge-shaped inclined surface of the pressure block 122 can first overcome the elastic force of the elastic connector 133 and push the sleeve 132 upward until the pressure block 122 is at the end of the V-groove 1312 away from the opening groove 1311. Since the lower end of the sleeve 132 is an opening corresponding to the slide rod 121, the elastic connector 133 will elastically rebound and position the pressure block 122 through the sleeve 132. In this way, the slide rod 121 can no longer move, thereby realizing the quick fixing between the bottom screen 101 and the upper screen 102 and between two adjacent upper screens 102 without the need for multiple locking, which simplifies the operation of the device during assembly.

[0020] When disassembling the device, the device can be disassembled by lifting each sleeve 132 upwards so that the sleeve 132 exits the pressure block 122, and then rotating the screen frame in the opposite direction.

[0021] As a further explanation of the latching mechanism in this embodiment, such as Figure 3 As shown, each card receiving mechanism 120 also includes: Guide rail 123 is located at the bottom of the ring disk 111 and extends along the radial direction of the screen frame 110; The first positioning rod 124 is fixed inside the guide rail 123 along the extension direction of the guide rail 123; The lower end of the slide rod 121 is inserted into the guide rail 123 and is slidably connected with the first positioning rod 124.

[0022] By setting the guide rail 123 and the first positioning rod 124, the sliding rod 121 can slide stably on the ring plate 111. The overall structure is simple and easy to process.

[0023] As a further explanation of the elastic connector in this embodiment, such as Figure 3 As shown, each of the elastic connectors 133 includes: Connecting plate 1331 is fixedly connected to the top of sleeve 132; The ring disc 111 and the connecting plate 1331 are elastically fixed by the connecting spring 1332; The second positioning rod 1333 passes through the connecting plate 1331 and is sleeved inside the connecting spring 1332. The two ends of the second positioning rod 1333 are fixedly connected to the ring discs 111 on the upper and lower sides of the upper screen 102, respectively.

[0024] By setting the connecting spring 1332, the connecting plate 1331 and the ring disc 111 are in an elastic connection, and the connecting plate 1331 is fixed to the top of the sleeve 132, thereby realizing the elastic connection of the sleeve 132; and by setting the second positioning rod 1333, the connecting plate 1331 can be positioned on the one hand, and since the second positioning rod 1333 is sleeved inside the connecting spring 1332, the connecting spring 1332 can be prevented from bending laterally.

[0025] As a further explanation of the sieve frame structure in this embodiment, such as Figures 1 to 6 As shown, each screen frame 110 is provided with a discharge channel 112, and each upper screen 102 discharge channel 112 is equipped with a discharge door that can be manually opened and closed (not shown in the figure). The discharge channel 112 is used to discharge powder during screening. In the actual screening process, the powder is screened from top to bottom. The bottom screen contains the smallest particles of powder. Therefore, during the screening process, the discharge gates of each upper screen 102 need to be closed first to avoid small particles of powder being accidentally discharged from the upper screen. After the smallest particles of powder have been completely discharged and no more are discharged, the discharge gates of each upper screen 102 are opened sequentially from bottom to screen and collect the powder at each level.

[0026] Meanwhile, this screening device also includes an upper cover 140, the upper cover 140 is provided with a feeding channel 141, and the feeding channel 141 is provided with a cover 142; The top cover 140 and the sealing cover 142 can cover the uppermost screen 102, thereby preventing external dust and impurities from entering. When feeding, by opening the sealing cover 142 to expose the feeding channel 141 of the top cover 140, the powder can be poured into the uppermost screen 102 for screening of powder at each level.

[0027] Each upper screen 102 has a filter screen 150 installed at the bottom of the screen frame 110. The filter screen 150 has a cone-shaped structure with the middle part protruding upwards. The bottom screen 101 does not have a filter screen at the bottom of the screen frame 110 and has a cone-shaped structure with the middle part protruding upwards.

[0028] The filter screen 150 is set with a conical structure so that the powder can be collected at the edge of the upper screen 102, so that it can enter the discharge channel 112 better through vibration during collection. The bottom screen 101 is at the bottom layer and does not screen anymore, so no filter screen is set. It also forms a conical structure so that it can enter the discharge channel 112 better through vibration during collection. It should be noted that the conical structure of the filter screen 150 should not be too high, so as to avoid the powder entering the upper screen 102 from accumulating too quickly at the edge of the upper screen 102, causing the material to pile up too quickly and making it difficult to screen. The conical structure of the bottom screen 101 can be more convex, so that the powder entering the bottom screen 101 can accumulate to the edge of the bottom screen 101 more quickly and be discharged quickly.

[0029] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An ultrasonic vibration screening device, comprising an ultrasonic transducer, a base, a bottom screen, and at least one upper screen, wherein a support platform is fixed to the base by springs, and the bottom screen is fixed to the support platform, characterized in that: Both the bottom screen and the upper screen include a screen frame and annular discs disposed on the upper and lower sides of the screen frame. The annular discs on the upper side of the bottom screen and the upper side of each upper screen also include multiple locking mechanisms. The annular discs on the lower side of each upper screen also include multiple limiting mechanisms corresponding to the locking mechanisms. Each of the aforementioned latching mechanisms includes: A sliding rod is vertically disposed on the annular disk, the upward extension height of the sliding rod matches the total thickness of the two annular disks, and the sliding rod and the annular disk are slidably connected along the radial direction of the screen frame; A pressure block, which is fixedly connected to the top of the slide rod, and the top of the pressure block is a wedge-shaped inclined surface; Each of the aforementioned limiting mechanisms includes: A snap-fit ​​groove is formed through the annular disk and matches the slide rod. The snap-fit ​​groove is composed of an open groove and a V-shaped groove. One end of the open groove passes through the edge of the annular disk, and the other end of the open groove is connected to the V-shaped groove. A sleeve, the lower end of which has an opening corresponding to the slide rod, and the sleeve is located above the end of the V-shaped groove that is away from the opening groove; An elastic connector is used to elastically connect the sleeve and the annular disc.

2. The ultrasonic vibration screening device according to claim 1, characterized in that: Each of the aforementioned snap-fit ​​mechanisms further includes: A guide rail is disposed at the bottom of the annular disk and extends along the radial direction of the screen frame; A first positioning rod is fixed inside the guide rail along the extension direction of the guide rail; The lower end of the slide bar is inserted into the guide rail and slidably connected to the first positioning rod.

3. The ultrasonic vibration screening device according to claim 1, characterized in that: The elastic connectors all include: A connecting plate, which is fixedly connected to the top of the sleeve; A connecting spring is used to elastically fix the ring disc and the connecting plate together.

4. The ultrasonic vibration screening device according to claim 3, characterized in that: The elastic connector further includes a second positioning rod, which passes through the connecting plate and is sleeved inside the connecting spring. The two ends of the second positioning rod are respectively fixedly connected to the ring discs on the upper and lower sides of the upper screen.

5. The ultrasonic vibration screening device according to claim 1, characterized in that: Each of the screen frames is equipped with a discharge channel, and each of the upper screens is equipped with a discharge door that can be manually opened and closed.

6. The ultrasonic vibration screening device according to claim 1, characterized in that: It also includes a top cover, which is provided with a feeding channel and a sealing cover.

7. The ultrasonic vibration screening device according to claim 1, characterized in that: Each of the upper screens has a filter screen installed at the bottom of its screen frame, with the middle of the filter screen protruding upwards to form a conical structure. The bottom screen does not have a filter screen installed at the bottom of its screen frame, and the middle of the bottom screen protrudes upwards to form a conical structure.

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