Airflow classifier for titanium alloy powder production

Abstract

The utility model discloses an airflow classifier for titanium alloy powder production, which comprises a plurality of tank bodies for titanium powder treatment or classification, a connecting structure is arranged between every two adjacent tank bodies, each connecting structure comprises a normally-closed gas circuit and an acting part, and when the two tank bodies are connected, the normally-closed gas circuit is connected with the acting part. The two acting parts interact with each other so as to open the normally closed gas circuit; and when one of the tank bodies is moved away, the normally-closed gas path returns to be closed. The air path of the connecting structure is set to be normally closed and is opened only when the tank body is mounted, so that when one tank body is dismounted, other adjacent tank bodies can be automatically closed at the joint, and when one tank body is temporarily dismounted, other tank bodies do not enter or reduce excess air entering, so that subsequent production recovery is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of air flow classifiers, and in particular to an air flow classifier for producing titanium alloy powders. Background Art

[0002] Airflow classifier is an airflow classification equipment. The classifier, cyclone separator, dust collector and induced draft fan form a classification system. Under the action of the fan suction, the material moves at high speed from the lower end of the classifier to the classification area with the rising airflow. Under the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated. The fine particles that meet the particle size requirements enter the cyclone separator or dust collector for collection through the gap between the blades of the classification wheel. The coarse particles carry some fine particles and disappear after hitting the wall. They fall along the cylinder wall to the secondary air outlet. After the strong washing effect of the secondary air, the coarse and fine particles are separated. The fine particles rise to the classification area for secondary classification, and the coarse particles fall to the discharge port for discharge.

[0003] Due to its active nature, titanium powder needs to maintain an inert gas atmosphere during airflow classification, so the sealing of the equipment is required to be high. In actual production, due to the need for fault maintenance or temporary shutdown and other special circumstances, it may be necessary to temporarily dismantle a tank of the equipment for troubleshooting or unloading operations. If it is dismantled directly during this process, other tanks adjacent to this tank will easily connect to the air during dismantling, allowing air to enter the remaining normal tanks. This will not only cause trouble for the subsequent resumption of production, but the mixed oxygen will also affect the quality of the titanium powder. Summary of the invention

[0004] One object of the present application is to provide an airflow classifier having an automatic closing function at the pipe connection during replacement.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: an air flow classifier for titanium alloy powder production, comprising a plurality of tanks for titanium powder processing or grading, a connecting structure is provided between each adjacent tank, the connecting structure comprises a normally closed air path and an action part, when the two tanks are connected, the two action parts interact with each other to open the normally closed air path; when one of the tanks is removed, the normally closed air path returns to being closed.

[0006] As a preferred embodiment, the normally closed gas circuit includes a first valve plate and a second valve plate from the inside to the outside, the first valve plate and the second valve plate are sealed, the first valve plate is provided with a plurality of first valve holes equidistantly distributed along the circumference, and the second valve plate is provided with a second valve hole corresponding to the first valve hole; the second valve plate is installed by a bearing and is provided with a torsion spring, and in an initial state, the torsion spring acts on the second valve plate to stagger the second valve hole with the first valve hole, so that the gas circuit is closed.

[0007] Preferably, an action groove is opened at the center of the outer side of the second valve plate, and a plurality of action parts are equidistantly arranged along the circumference of the action groove; the action part includes an inclined surface, and when the two tank bodies are in contact, the action part of one of the tank bodies acts on the action part of the other tank body, so that the two groups of the action parts are guided and moved, thereby causing the two second valve plates to rotate, thereby causing the second valve hole to correspond to the first valve hole and the air path to be connected.

[0008] Preferably, a fixing rod is axially installed in the connecting structure, and the fixing rod passes through the center of the first valve plate. The first valve plate is fixedly installed on the inner wall of the connecting structure, and the second valve plate is rotatably fixed to the inner wall of the connecting structure. The second valve plate is provided with an avoidance groove suitable for the fixing rod, and the torsion spring is fixed on the end of the fixing rod, and the other end of the torsion spring is fixedly connected to the inner wall of the avoidance groove of the second valve plate.

[0009] As a preferred embodiment, the side projection of the action part is a right-angled trapezoid, the inclined surface is formed on the hypotenuse of the right-angled trapezoid, and the action part is formed with an abutment part at the highest point of the hypotenuse. When the two tank bodies are connected, the abutment part of one of the action parts acts on the inclined surface of the other tank body, so that the two are subjected to force and rotate against each other.

[0010] As a preferred embodiment, the inclined surface is an arc-shaped inclined surface.

[0011] As a preference, the diameter of the first valve hole is larger than the diameter of the second valve hole, and a rounded transition is formed at the connection between the two.

[0012] Preferably, a mounting frame is provided at the bottom of the tank body, and the tank body and the mounting frame are detachably mounted.

[0013] As a preference, a mounting plate is provided at the outer end of the connection structure, and the two tank bodies are fixed by the mounting plate after being connected; a handle is provided on the outer wall of the connection structure, and when the two tank bodies are installed, the operator applies force through the handle.

[0014] Preferably, the connecting structure forms an extension portion in the inner cavity of the tank body.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] By setting the gas circuit of the connecting structure to be normally closed, it is opened only when the tank is installed. In this way, when a tank is removed, other adjacent tanks can be automatically closed at the connection. Therefore, when a tank is temporarily removed, other tanks will not enter or will reduce the amount of excess air that enters, making it easier to resume production later. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the local structure of an embodiment of the present application.

[0018] Figure 2 yes Figure 1 Schematic diagram of the connection.

[0019] Figure 3 yes Figure 2 Schematic diagram of the structure on the left.

[0020] Figure 4 yes Figure 3 sectional view of .

[0021] Figure 5 yes Figure 3 Schematic diagram when the structure is dispersed.

[0022] Figure 6 1 is a state diagram of the first valve plate and the second valve plate when they are closed.

[0023] Figure 7 1 is a state diagram of the first valve plate and the second valve plate when they are open.

[0024] In the figure: 1, tank body; 2, first connecting part; 3, second connecting part; 4, mounting frame; 5, handle; 6, mounting plate; 7, extension part; 8, first valve plate; 9, first valve hole; 10, second valve plate; 11, action groove; 12, action part; 12a, inclined surface; 13, second valve hole; 14, torsion spring; 15, fixing rod; 16, mounting part. DETAILED DESCRIPTION

[0025] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0028] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0029] Example:

[0030] Reference Figure 1-Figure 7 As shown, this embodiment proposes an airflow classifier for titanium alloy powder production, including a plurality of tanks 1 for titanium powder processing or classification, and a connection structure is provided between two adjacent tanks 1, the connection structure including a normally closed gas path and an action part 12. When the two tanks 1 are connected, that is, Figure 1 The first connection part 2 and the second connection part 3 shown are connected, and the two action parts 12 interact with each other to open the normally closed gas circuit; when one of the tank bodies 1 is removed, the normally closed gas circuit returns to airtightness. Due to the relatively active nature of titanium powder, it is necessary to ensure an inert gas atmosphere when performing airflow classification, so the sealing requirements of the equipment are relatively high; in actual production, due to the needs of fault maintenance or temporary shutdown and unloading, it may be necessary to temporarily dismantle a certain tank body 1 of the equipment for troubleshooting or unloading operations. If it is directly dismantled during this process, other tank bodies 1 adjacent to this tank body 1 are easily connected to the air during dismantling, so that the tank body 1 enters the air, which not only causes trouble for the subsequent resumption of production, but also the mixed oxygen will affect the quality of the titanium powder; this equipment sets the gas circuit of the connection structure to be normally closed, which is only opened when the tank body 1 is installed, so that when a certain tank body 1 is dismantled, the other tank bodies 1 adjacent to it can be automatically closed at the connection, so as to facilitate the subsequent resumption of production.

[0031] like Figure 2 , Figure 3As shown, the normally closed gas circuit includes a first valve plate 8 and a second valve plate 10 from the inside to the outside, the first valve plate 8 and the second valve plate 10 are sealed, the first valve plate 8 is provided with a plurality of first valve holes 9 equidistantly distributed along the circumference, and the second valve plate 10 is provided with a second valve hole 13 corresponding to the first valve hole 9; the second valve plate 10 is installed through a bearing and is provided with a torsion spring 14. In the initial state, the torsion spring 14 acts on the second valve plate 10 to stagger the second valve hole 13 with the first valve hole 9, so that the gas circuit is closed. The torsion spring 14 allows the second valve plate 10 to keep the gas circuit closed with the first valve plate 8 in a natural state, and when the tank body 1 is connected, the torsion spring 14 is deformed, and the second valve plate 10 rotates to open the gas circuit. After the tank body 1 is removed, the torsion spring 14 is elastically reset, so that the gas circuit is automatically closed. In some other embodiments thereof, the torsion spring 14 can also be replaced by a circlip or other elastic structure.

[0032] Further, such as Figure 3 , Figure 4 and Figure 5 As shown, an action groove 11 is opened at the center of the outer side of the second valve plate 10, and a plurality of action parts 12 are arranged equidistantly along the circumference of the action groove 11; the action part 12 includes an inclined surface 12a. When the two tank bodies 1 are in contact, the action part 12 of one tank body 1 acts on the action part 12 of the other tank body 1, so that the two groups of action parts 12 are guided and moved, so that the two second valve plates 10 are rotated, and then the second valve hole 13 corresponds to the first valve hole 9 and the air path is connected.

[0033] In order to facilitate the installation of the first valve plate 8 and the second valve plate 10, a fixing rod 15 is axially installed in the connecting structure. Figure 4 As shown, the second valve plate 10 can be rotatably fixed to the inner wall of the connecting structure by arranging a connecting rod at the bottom and fixing the connecting rod to the inner wall of the connecting structure. The fixing rod 15 passes through the center of the first valve plate 8, the first valve plate 8 is fixedly mounted on the inner wall of the connecting structure, and the second valve plate 10 is rotatably fixed to the inner wall of the connecting structure (such as Figure 4 As shown, an annular groove can be opened on the side of the second valve plate 10, and an annular mounting portion 16 is provided on the inner wall of the connecting structure 2, and the two can cooperate to realize the rotatable fixed installation of the second valve plate 10), the second valve plate 10 is provided with an avoidance groove suitable for the fixing rod 15, and a torsion spring 14 is fixed at the end of the fixing rod 15, and the other end of the torsion spring 14 is fixedly connected to the inner wall of the avoidance groove of the second valve plate 10.

[0034] like Figure 4 As shown, the side projection of the action part 12 is a right-angled trapezoid, the inclined surface 12a is formed on the hypotenuse of the right-angled trapezoid, and the action part 12 is formed with an abutment portion at the highest point of the hypotenuse. When two can bodies 1 are connected, the abutment portion of one action part 12 acts on the inclined surface 12a of the other can body 1, so that the two can bodies 1 are subjected to force and rotate with each other. Preferably, the inclined surface 12a is an arc-shaped inclined surface, which helps to make the action parts 12 more gentle when interacting with each other, thereby reducing friction during action.

[0035] In order to facilitate material communication, the diameter of the first valve hole 9 is larger than the diameter of the second valve hole 13, and a rounded transition is formed at the connection between the two, wherein the rounded transition is not marked in the drawings but does not affect understanding.

[0036] like Figure 1 The bottom of the tank body 1 is provided with a mounting frame 4, and the tank body 1 and the mounting frame 4 are detachably mounted. The outer end of the connection structure is provided with a mounting plate 6, and the two tank bodies 1 are fixed by the mounting plate 6 after being connected; the outer wall of the connection structure is provided with a handle 5, and when the two tank bodies 1 are installed, the operator exerts force through the handle 5, thereby facilitating installation.

[0037] Continue to refer to Figure 1 The connecting structure forms an extension portion 7 in the inner cavity of the tank body 1. The setting of the extension portion 7 can prevent the material in the tank body 1 from entering the connecting structure to a certain extent. When grading is performed in the tank body 1, the titanium powder rising with the air flow may be accompanied by a small amount of larger particles of titanium powder in addition to smaller particles. At this time, the setting of the extension portion 7 can prevent the larger particles of titanium powder to a certain extent, but has little effect on the small particles of titanium powder, which helps to improve the grading quality.

[0038] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. An airflow classifier for titanium alloy powder production, comprising a plurality of tanks for titanium powder processing or classification, characterized in that: A connection structure is provided between two adjacent tanks, and the connection structure includes a normally closed gas path and an action part. When the two tank bodies are connected, the two acting parts interact with each other to open the normally closed gas circuit; when one of the tank bodies is removed, the normally closed gas circuit returns to being airtight.

2. The air flow classifier for titanium alloy powder production according to claim 1, characterized in that: The normally closed gas circuit includes a first valve plate and a second valve plate from the inside to the outside, the first valve plate and the second valve plate are sealed, the first valve plate is provided with a plurality of first valve holes equidistantly distributed along the circumference, and the second valve plate is provided with a second valve hole corresponding to the first valve hole; the second valve plate is installed by a bearing and is provided with a torsion spring, and in an initial state, the torsion spring acts on the second valve plate to stagger the second valve hole with the first valve hole, so that the gas circuit is closed.

3. The air flow classifier for titanium alloy powder production according to claim 2, characterized in that: An action groove is opened at the center of the outer side of the second valve plate, and a plurality of action parts are arranged equidistantly along the circumference of the action groove; the action part includes an inclined surface, and when the two tank bodies are in contact, the action part of one of the tank bodies acts on the action part of the other tank body, so that the two groups of the action parts are guided and moved, thereby causing the two second valve plates to rotate, thereby causing the second valve hole to correspond to the first valve hole and the air path to be connected.

4. The air flow classifier for titanium alloy powder production according to claim 2, characterized in that: A fixing rod is axially installed in the connecting structure, and the fixing rod passes through the center of the first valve plate. The first valve plate is fixedly installed on the inner wall of the connecting structure, and the second valve plate is rotatably fixed to the inner wall of the connecting structure. The second valve plate is provided with an avoidance groove suitable for the fixing rod, and the torsion spring is fixed to the end of the fixing rod, and the other end of the torsion spring is fixedly connected to the inner wall of the avoidance groove of the second valve plate.

5. The air flow classifier for titanium alloy powder production according to claim 3, characterized in that: The side projection of the action part is a right-angled trapezoid, the inclined surface is formed on the hypotenuse of the right-angled trapezoid, and the action part is formed with an abutment part at the highest point of the hypotenuse. When the two tank bodies are connected, the abutment part of one action part acts on the inclined surface of the other tank body, so that the two are subjected to force and rotate against each other.

6. The air flow classifier for titanium alloy powder production according to claim 5, characterized in that: The inclined surface is an arc-shaped inclined surface.

7. The air flow classifier for titanium alloy powder production according to claim 2, characterized in that: The diameter of the first valve hole is greater than the diameter of the second valve hole, and a rounded transition is formed at the connection between the two.

8. The air flow classifier for titanium alloy powder production according to claim 1, characterized in that: A mounting frame is provided at the bottom of the tank body, and the tank body and the mounting frame are detachably mounted.

9. The air flow classifier for titanium alloy powder production according to claim 1, characterized in that: The outer end of the connection structure is provided with a mounting plate, and the two tank bodies are fixed by the mounting plate after being connected; the outer wall of the connection structure is provided with a handle, and when the two tank bodies are installed, the operator exerts force through the handle.

10. The air flow classifier for titanium alloy powder production according to claim 1, characterized in that: The connecting structure forms an elongated portion in the inner cavity of the tank body.

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