Tangent filter screen screening machine

Abstract

The utility model discloses a tangent type filter screen screening machine which comprises a machine body with a screening cavity, a sinking screen mesh and a top screen mesh which are opposite and abut against each other are arranged in the screening cavity, the sinking screen mesh is a sinking type cambered surface screening mesh, the top screen mesh is a top type cambered surface screening mesh, and filter holes of the sinking screen mesh and the top screen mesh are vertically formed. The structure of the screen is improved, an original conventional screen is replaced by the sinking screen and the top screen which are opposite and abut against each other, filter holes are still vertically opened, the sinking screen can effectively reduce the stress deformation degree of a flat screen, meanwhile, the additionally arranged top screen can not only enhance the screening precision, but also improve the screening efficiency. And the sunken screen can be supported, the possibility that the screen is stressed and deformed is further reduced, and the screen can be continuously used for a longer time.

Description

Technical Field

[0001] The utility model relates to the technical field of metal powder screening, and more specifically, to a tangential filter screen screening machine. Background Art

[0002] The metal powder sifter is mainly used for sieving metal powder. The principle is that the mixed powder is graded layer by layer through sieves with different particle size passivities, and then the powders in different particle size ranges are classified and produced and delivered according to customer requirements.

[0003] However, the current screen mesh is a horizontal mesh because of its small and dense mesh size. The filter area is easily deformed by the impact of a large amount of metal powder falling, which causes the mesh to be elongated and deformed, resulting in the screen mesh failing to accurately screen the target particle size powder and greatly shortening its service life. Replacing the screen mesh is also a tedious task. Blindly pursuing screening accuracy can easily lead to reduced powder screening efficiency, large amounts of powder accumulating and blocking the screen mesh, affecting the normal use of the equipment. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a tangent type filter screening machine to solve one or more of the above problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The tangent filter screening machine comprises a machine body with a screening cavity, wherein a sinking screen and a top screen which are opposite and in conflict with each other are arranged in the screening cavity, wherein the sinking screen is a sinking arc-surface screening screen, and the top screen is an upper arc-surface screening screen, and the filter holes of the sinking screen and the top screen are both opened vertically.

[0007] Furthermore, the abutting ends of the sinking screen and the top screen are provided with a docking surface, and the docking surface is horizontal and solid and has a width not greater than the sum of the diameters of the four screen meshes.

[0008] Furthermore, the depth of the sinking screen is greater than the height of the top screen, and the curvature of the sinking screen is greater than that of the top screen.

[0009] Furthermore, the machine body is divided into a screening frame and a supporting frame, the supporting frame is grounded, the screening frame and the supporting frame are connected via a supporting spring, a vibration motor is provided on the supporting frame, and the vibration motor drives the screening frame to vibrate relative to the supporting frame.

[0010] Furthermore, the screening frame includes a top cover, two screening drawers and two material dropping pipes, wherein the bottom of one of the screening drawers is connected by the supporting spring, and the top of the other screening drawer is provided with a detachable top cover, the two material dropping pipes are respectively connected to the corresponding interiors of the screening drawers, the two screening drawers are detachably connected, and the sinking screen and the top screen are added at the joint of the two screening drawers.

[0011] Furthermore, two ends of the support spring are fixed with docking bolts, and the docking bolts are inserted into the threaded grooves at the bottom of the screening frame and the top of the support frame.

[0012] In summary, the utility model has the following beneficial effects: by improving the screen structure, the original conventional screen is replaced with a sinking screen and a top screen that are relative and abutting each other, and the filter holes are still vertically open, and the sinking screen can effectively reduce the degree of stress deformation of the flat screen. At the same time, the added top screen can not only enhance the screening accuracy, but also support the sinking screen, further reducing the possibility of stress deformation of the screen, and the screen can be used continuously for a longer period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the overall structure of an implementation method provided by the utility model;

[0014] Figure 2 A schematic diagram of a sinking screen structure according to an embodiment of the present invention;

[0015] Figure 3 A partial schematic diagram of the installation structure of the sinking screen and the top screen according to an embodiment of the utility model.

[0016] In the figure: 10, screening chamber; 20, machine body; 21, screening frame; 22, support frame; 23, support spring; 24, vibration motor; 25, top cover; 26, screening drawer; 27, material delivery pipe; 30, sinking screen; 40, top screen; 50, docking surface. DETAILED DESCRIPTION

[0017] Example:

[0018] The following is combined with Figure 1-3 The utility model is described in further detail.

[0019] Tangential screen screening machines, such as Figure 1As shown, the main body is a body 20 with a screening chamber 10, and the relevant structure is similar to the existing vibration screening machine on the market. The body 20 is divided into a screening frame 21 in the upper part and a support frame 22 in the lower part. The two frames are connected by a support spring 23, and the support frame 22 is grounded. Specifically, the screening frame 21 includes two screening drawers 26 and a top cover 25. The side wall of the screening drawer 26 is provided with a blanking pipe 27 which is integrally formed with it and internally connected, and the discharge port of the blanking pipe 27 is set downward. The bottom of the screening drawer 26 is provided with a threaded groove distributed along the circumference. The two screening drawers 26 are installed by bolt docking, and a special screen is set at the docking point of the two screening drawers 26. The top of the upper screening drawer 26 is also docked with a detachable top cover 25, and the bottom of the lower screening drawer 26 is docked with the support frame 22. The two ends of the support spring 23 are provided with fixed docking bolts, which respectively dock the thread groove of the lower screening drawer 26 and the thread groove on the top of the support frame 22 to achieve the docking of the upper and lower frames. A vibration motor 24 is also provided on the support frame 22, and the functional end of the vibration motor 24 is docked with the screening frame 21. The vibration motor 24 drives the screening frame 21 to vibrate as a whole, and the support frame 22 is grounded and fixed, and the support spring 23 is used to buffer the unloading force between the two.

[0020] like Figure 2 and Figure 3As shown, a sinking screen 30 and a top screen 40 are arranged opposite to each other in the screening chamber 10 and between the two screening drawers 26. The sinking screen 30 is a sinking arc-shaped screening net, and the top screen 40 is an upper arc-shaped screening net, and the filter holes of the two are opened vertically. The depth of the sinking screen 30, that is, the distance between the top of the sinking arc surface of the sinking screen 30 and the horizontal plane at the top of the sinking screen 30, is greater than the height of the top screen 40, that is, the distance between the top of the top arc surface of the top screen 40 and the horizontal plane at the bottom of the top screen 40. This not only adapts to the space left for the installation of the screen in the screening chamber 10 structure, but also can distinguish the primary and secondary functions of the screen, and avoid the reduction of efficiency caused by repeated screening. It is best to use corresponding arc-shaped molds for opening holes for the sinking screen 30 and the top screen 40, rather than the integration of the existing iron ring and soft metal filter, so that the deformation resistance is better. In order to stabilize the supporting structure of the two and facilitate their positioning, a horizontal and smooth docking surface 50 is cut at the end of the arc surface of the sinking screen 30 and the end of the arc surface of the top screen 40. After the two screens are installed on the screening drawer 26, the docking surfaces 50 of the two can naturally contact each other. Preferably, the width of the docking surface 50 in the horizontal direction shall not be greater than the sum of the diameters of the filter meshes of the four screens. This is also to ensure the screening performance of the screen as a whole. The docking surface 50 of the sinking screen 30 upward and the docking surface 50 of the top screen 40 downward are both solid parts without slots to prevent powder accumulation and waste in the control. The filter meshes of the sinking screen 30 and the top screen 40 can be aligned, and only corresponding protrusions and grooves need to be set on the docking surface 50, but it is better to set it freely to form dislocation screening, which further improves the screening accuracy. In this way, even if metal powder causes a large impact force on the sinking screen 30, the structure of the sinking screen 30 itself will adapt to the impact force, and the top screen 40 will further provide support, so that the tensile deformation of the screen is significantly improved.

[0021] It should be noted that this specific embodiment is merely an explanation of the present utility model, and it is not a limitation of the present utility model. After reading this specification, those skilled in the art can make non-creative modifications to the present embodiment as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

Claims

1. A tangential filter screener, comprising a body (20) with a screening chamber (10), characterized in that: The screening chamber (10) is provided with a sinking screen (30) and a top screen (40) which are opposite and in contact with each other. The sinking screen (30) is a sinking curved surface screening screen, and the top screen (40) is an upper curved surface screening screen. The filter holes of the sinking screen (30) and the top screen (40) are both vertically opened.

2. The tangential filter screen according to claim 1, characterized in that: The butting ends of the sinking screen (30) and the top screen (40) are provided with a butting surface (50), and the butting surface (50) is horizontal and solid, and its width is not greater than the sum of the diameters of the four screen meshes.

3. The tangential filter screen according to claim 1, characterized in that: The depth of the sinking screen (30) is greater than the height of the top screen (40), and the curvature of the sinking screen (30) is greater than that of the top screen (40).

4. The tangential filter screen according to claim 1, characterized in that: The machine body (20) is divided into a screening frame (21) and a supporting frame (22); the supporting frame (22) is grounded; the screening frame (21) and the supporting frame (22) are connected via a supporting spring (23); a vibration motor (24) is provided on the supporting frame (22); the vibration motor (24) drives the screening frame (21) to vibrate relative to the supporting frame (22).

5. The tangential filter screen according to claim 4 is characterized in that: The screening frame (21) comprises a top cover (25), two screening drawers (26) and two material discharge pipes (27), wherein the bottom of one of the screening drawers (26) is connected via the support spring (23), and the top of the other screening drawer (26) is provided with a detachable top cover (25), and the two material discharge pipes (27) are respectively connected to the inside of the corresponding screening drawers (26), and the two screening drawers (26) are detachably connected, and the sinking screen (30) and the top screen (40) are provided at the joint of the two screening drawers (26).

6. The tangential filter screen according to claim 4, characterized in that: The two ends of the support spring (23) are fixed with butt bolts, and the butt bolts are inserted into the thread grooves at the bottom of the screening frame (21) and the top of the support frame (22).

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