A dust-proof structure for a powder metallurgy sintering furnace

Abstract

The present invention relates to the technical field of powder metallurgy equipment, and specifically relates to a dust-proof structure for a powder metallurgy sintering furnace, which includes an exhaust pipe. A cylindrical inner cavity is provided on the exhaust pipe, and the cylindrical inner cavity divides the interior of the exhaust pipe into a first exhaust channel and a second exhaust channel. The cylindrical inner cavity is respectively communicated with the first exhaust channel and the second exhaust channel. An X-shaped filter screen is arranged in the cylindrical inner cavity, and a central shaft is installed at the central position of the X-shaped filter screen. A motor for driving the central shaft to rotate is installed on the exhaust pipe. A chip discharge port is arranged on the exhaust pipe corresponding to the position of the cylindrical inner cavity, and the chip discharge port is arranged close to the second exhaust channel. The dust-proof structure of the powder metallurgy sintering furnace provided by the present invention can prevent the filter screen from being blocked without the need for staff to frequently clean the filter screen.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy equipment, and particularly to a dust-proof structure for a powder metallurgy sintering furnace. Background Art

[0002] Powder metallurgy is a process technology for producing metal powders or using metal powders (or mixtures of metal powders and non-metal powders) as raw materials, and manufacturing metal materials, composite materials, and various types of products through forming and sintering. The powder metallurgy sintering furnace is an important equipment for powder metallurgy. During its operation, dust will be generated. Therefore, a filter screen structure is set at the exhaust port of the powder metallurgy sintering furnace to prevent dust from being discharged outside and polluting the environment. Although this method can prevent dust from being discharged outside and polluting the environment, the filter screen needs to be frequently cleaned by staff to prevent the filter screen from being blocked. Summary of the Invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a dust-proof structure for a powder metallurgy sintering furnace to solve the above technical problems.

[0004] In order to achieve the above-mentioned invention purpose, the technical solution provided by the present invention is as follows:

[0005] A dust-proof structure for a powder metallurgy sintering furnace, including an exhaust pipe, a cylindrical inner cavity is arranged on the exhaust pipe, the cylindrical inner cavity divides the inside of the exhaust pipe into a first exhaust channel and a second exhaust channel, and the cylindrical inner cavity is respectively communicated with the first exhaust channel and the second exhaust channel; an X-shaped filter screen is arranged in the cylindrical inner cavity, a central shaft is installed at the central position of the X-shaped filter screen, and a motor for driving the central shaft to rotate is installed on the exhaust pipe; a chip discharge port is arranged on the exhaust pipe corresponding to the position of the cylindrical inner cavity, and the chip discharge port is arranged close to the second exhaust channel.

[0006] Preferably, an arc-shaped shielding piece is arranged at one end of the X-shaped filter screen far from the central shaft, and the width of the arc-shaped shielding piece is greater than the width of the chip discharge port.

[0007] Preferably, the width of the arc-shaped shielding piece is greater than or equal to half of the maximum distance between two adjacent filter pieces of the X-shaped filter screen;

[0008] Wherein, the maximum distance between two adjacent filter pieces: the distance between one ends of two adjacent filter pieces far from the central shaft;

[0009] The widths of the first exhaust channel and the second exhaust channel are less than or equal to half of the maximum distance between two adjacent filter pieces of the X-shaped filter screen.

[0010] Preferably, the central shaft is fixedly connected to the X-shaped filter screen.

[0011] Preferably, the central axis is connected to the X-shaped filter net by a torsion spring.

[0012] Preferably, the central position of the X-shaped filter net is a circular tube, and the central axis passes through the circular tube and is rotatably connected to the circular tube; a torsion spring is sleeved on one end of the central axis away from the motor, one end of the torsion spring is fixed on the central axis, and the other end is fixed on the circular tube.

[0013] Preferably, a convex portion is provided at one end of the circular tube away from the motor; one end of the torsion spring passes through the central axis, and the other end passes through the convex portion.

[0014] Preferably, the motor is a stepper motor.

[0015] When the dust-proof structure of the powder metallurgy sintering furnace provided by the present invention is in use, the second exhaust passage is connected to the exhaust port of the powder metallurgy sintering furnace. When the powder metallurgy sintering furnace is working, the generated dust rises with the air flow and is blocked by the X-shaped filter net. When the two filter pieces below the X filter net are blocked or within a certain period of time, the motor drives the X-shaped filter net to rotate, so that the two filter pieces below the X filter net rotate 90 degrees once or multiple times. Finally, under the action of gravity, the dust attached to the two filter pieces is finally discharged from the chip discharge port. In this way, it is not necessary for the staff to clean the filter net frequently to prevent the filter net from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows a schematic structural diagram of the dust-proof structure of the powder metallurgy sintering furnace in Embodiment 1;

[0017] Figure 2 Shows a schematic installation structure diagram of a torsion spring;

[0018] Figure 3 Shows one of the schematic structural diagrams of the dust-proof structure of the powder metallurgy sintering furnace in Embodiment 2;

[0019] Figure 4 Shows another schematic structural diagram of the dust-proof structure of the powder metallurgy sintering furnace in Embodiment 2;

[0020] Markings in the drawings:

[0021] Exhaust duct 1, inner cavity 1-1, first exhaust passage 1-3, second exhaust passage 1-2, chip discharge port 1-4; X-shaped filter net 2, arc-shaped shielding piece 2-1, circular tube 2-2, filter piece 2A; central axis 3, torsion spring 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1. Please refer to Figure 1 , the present application provides a dust-proof structure for a powder metallurgy sintering furnace, including an exhaust pipe 1. A cylindrical inner cavity 1-1 is provided on the exhaust pipe. The cylindrical inner cavity divides the interior of the exhaust pipe into a first exhaust channel 1-3 and a second exhaust channel 1-2. The cylindrical inner cavity is respectively communicated with the first exhaust channel and the second exhaust channel. An X-shaped filter screen 2 is arranged in the cylindrical inner cavity. A central shaft 3 is installed at the central position of the X-shaped filter screen. A motor for driving the central shaft to rotate is installed on the exhaust pipe. A chip discharge port 1-4 is arranged on the exhaust pipe corresponding to the position of the cylindrical inner cavity. The chip discharge port is arranged close to the second exhaust channel.

[0024] When the above dust-proof structure of the powder metallurgy sintering furnace is in use, the second exhaust channel is connected to the exhaust port of the powder metallurgy sintering furnace. When the powder metallurgy sintering furnace is working, the generated dust rises with the air flow and is blocked by the X-shaped filter screen. When the two filter pieces below the X filter screen are blocked or within a certain period of time, the motor drives the X-shaped filter screen to rotate, so that the two filter pieces below the X filter screen rotate counterclockwise by 90 degrees (the rotation direction is shown by the arrow). Under the action of gravity, the dust attached to the two filter pieces finally discharges through the chip discharge port, so that the filter screen can be prevented from being blocked without the need for staff to clean the filter screen frequently.

[0025] During actual production, the central shaft and the X-shaped filter screen can be fixedly connected. As a preferred embodiment, please refer to Figure 2, the central axis is connected to the X-shaped filter net through a torsion spring. During actual production, the central position of the X-shaped filter net can be a circular tube 2-2, and the central axis passes through the circular tube and is rotatably connected to the circular tube; a torsion spring 4 is sleeved on the end of the central axis away from the motor. One end of the torsion spring is fixed on the central axis, and the other end is fixed on the circular tube. The fixing method can use existing methods, such as welding, clamping, etc. In this embodiment, a convex portion is provided at the end of the circular tube away from the motor; one end of the torsion spring passes through the central axis, and the other end passes through the convex portion. When this structure is in use, when the motor rotates, the motor drives, and the torsion spring first deforms to generate elastic force. When the motor stops rotating, the X-shaped filter net continues to rotate under the action of inertia until the torsion spring reaches the maximum rebound force and then rotates in the opposite direction and finally stops. During this process, the X filter net moves repeatedly, making it more difficult for dust to adhere to the filter net, which is beneficial to the shedding of dust on the filter net; in this embodiment, the motor can use a general AC motor, and a stepping motor is preferably used.

[0026] Embodiment 2, please refer to Figure 3 . The structure of Embodiment 2 is substantially the same as that of Embodiment 1, except that: an arc-shaped shielding piece 2-1 is provided at the end of the X-shaped filter net away from the central axis, and the width of the arc-shaped shielding piece is greater than the width of the chip discharge port. When the dust-proof structure of the powder metallurgy sintering furnace in this embodiment is in use, the second exhaust passage is connected to the exhaust port of the powder metallurgy sintering furnace. When the powder metallurgy sintering furnace is working, the generated dust rises with the air flow and is blocked by the X-shaped filter net. When the two filter pieces below the X filter net are blocked or within a certain period of time, the motor drives the X-shaped filter net to rotate, so that the two filter pieces below the X filter net rotate 90 degrees clockwise (the rotation direction is shown by the arrow). Under the action of gravity, the dust attached to the two filter pieces finally reaches the lower filter piece. Then the motor drives the two filter pieces below the X filter net to rotate 90 degrees clockwise again, and the dust approaches the left filter piece. Then the motor drives the two filter pieces below the X filter net to rotate 90 degrees clockwise again. Under the action of gravity, the dust attached to the two filter pieces finally discharges from the chip discharge port. In this way, it is not necessary for the staff to often clean the filter net to prevent the filter net from being blocked. In this structure, the dust passes through the three rotations of the filter net, especially under the action of the torsion spring, through three vibrations, making it more difficult for the dust to adhere to the filter net, which is beneficial to the shedding of dust on the filter net.

[0027] During actual production, the width of the arc-shaped shielding piece can be less than half of the maximum distance between two adjacent filter pieces 2A of the X-shaped filter net. Among them, the maximum distance between two adjacent filter pieces: the distance between the ends of two adjacent filter pieces away from the central axis. At this time, the widths of the first exhaust passage and the second exhaust passage are preferably greater than or equal to half of the maximum distance between two adjacent filter pieces 2A of the X-shaped filter net. As a preferred implementation method, refer to Figure 4, the width of the arc-shaped baffle is greater than or equal to half of the maximum distance between two adjacent filter sheets 2A of the X-shaped filter net, where the maximum distance between two adjacent filter sheets 2A: the distance at the end of two adjacent filter sheets away from the central axis. Preferably, the widths of the first exhaust passage and the second exhaust passage are less than or equal to half of the maximum distance between two adjacent filter sheets 2A of the X-shaped filter net. In this way, when dust rises with the airflow and is blocked by the X-shaped filter net, after the right filter sheet rotates 90 degrees clockwise on the X-shaped filter net, the left filter net sheet is located above it, and the attached dust falls onto it. Then, after the X-shaped filter net rotates 90 degrees clockwise again, the dust accumulates near the filter sheet on the right (the left side in the existing state). The arc-shaped baffle has a certain blocking effect on it from above. Then, after the X-shaped filter net rotates 90 degrees clockwise again, under the action of gravity, the dust attached to the two filter sheets finally discharges from the chip discharge port; during the rotation of the X-shaped filter net in this structure, the airflow can maintain the flow through the second exhaust passage - the filter net - the first exhaust passage.

[0028] It should be noted that the phrases such as "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily each embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures or characteristics in combination with other embodiments, whether explicitly or implicitly described.

[0029] It should be easily understood that the terms "on", "above", and "over" in this disclosure should be interpreted in the broadest manner, so that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but may also include the meaning of "above" or "over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0030] In addition, for the convenience of description, spatial relative terms may be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the figure. Spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive words used in the text may be interpreted accordingly.

[0031] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust-proof structure for a powder metallurgy sintering furnace, comprising an exhaust duct (1), characterized in that: The exhaust duct is provided with a cylindrical inner chamber (1-1), the cylindrical inner chamber divides the interior of the exhaust duct into a first exhaust channel (1-3) and a second exhaust channel (1-2), and the cylindrical inner chamber is respectively connected to the first exhaust channel and the second exhaust channel; An X-shaped filter screen (2) is arranged in the cylindrical inner chamber, a central shaft (3) is installed at the center of the X-shaped filter screen, and a motor for driving the central shaft to rotate is installed on the exhaust pipe; A chip removal opening (1-4) is arranged on the exhaust duct at a position corresponding to the cylindrical inner chamber, and the chip removal opening is arranged close to the second exhaust channel; An arc-shaped shielding piece (2-1) is provided at one end of the X-shaped filter screen away from the central axis, and the width of the arc-shaped shielding piece is greater than the width of the chip removal opening; The width of the arc-shaped shielding sheet is greater than or equal to half of the maximum distance between two adjacent filter sheets (2A) of the X-shaped filter screen; The maximum distance between two adjacent filter sheets is the distance between two adjacent filter sheets away from one end of the central axis; The width of the first exhaust channel and the second exhaust channel is less than or equal to half of the maximum distance between two adjacent filter sheets of the X-shaped filter screen; The central shaft is connected to the X-shaped filter screen via a torsion spring; The center position of the X-shaped filter screen is a circular tube (2-2), and the central axis passes through the circular tube and is rotatably connected to the circular tube; A torsion spring (4) is sleeved on one end of the central shaft away from the motor, one end of the torsion spring is fixed on the central shaft, and the other end is fixed on the round tube; When the dust rises with the airflow and is blocked by the X-shaped filter, after the X-shaped filter rotates 90 degrees clockwise, the filter on the left side of the right side of the two filter sheets below the X-shaped filter is located above it, and the attached dust falls on it. Then, after the X-shaped filter rotates 90 degrees clockwise again, the dust accumulates on the filter sheet located on the upper left side, and the arc-shaped shielding sheet has a certain blocking effect on it. Then, after the X-shaped filter rotates 90 degrees clockwise again, under the action of gravity, the dust attached to the two filter sheets is finally discharged from the chip discharge port.

2. The dustproof structure of a powder metallurgy sintering furnace according to claim 1, characterized in that: A protrusion is provided at one end of the circular tube away from the motor; One end of the torsion spring passes through the central shaft, and the other end passes through the protruding portion.

3. The dustproof structure of a powder metallurgy sintering furnace according to claim 1, characterized in that: The motor is a stepping motor.

Images