Rotating arm type flap valve for induction type vacuum rapid quenching furnace

Abstract

The utility model discloses a rotating arm type flap valve for an induction type vacuum rapid quenching furnace, which comprises a flap valve plate arranged at the bottom of a receiving hopper, and the receiving hopper is arranged in a square transition box body; a front box plate and a rear box plate of the square transition box body are respectively provided with a rotating arm supporting bearing seat, a rotating arm supporting shaft is arranged between the two rotating arm supporting bearing seats, and a rotating arm is arranged on the rotating arm supporting shaft; the rotating arm is hinged with the flap valve plate through a hinge seat; when the flap valve plate is attached to the bottom of the material receiving hopper, the self-locking block rotates to the bottom of the flap valve plate to lock the position of the flap valve plate. Opening and closing in the casting piece blanking process can be controlled by rotating the handle, a vacuum gate valve used on line at present can be replaced, and 360 tons of casting pieces can be conveyed by using 60 heats without faults, in total about 6000 hours.

Description

Technical Field

[0001] The utility model belongs to the technical field of induction vacuum rapid quenching furnaces, and in particular relates to a rotary arm type flap valve used for induction vacuum rapid quenching furnaces. Background Art

[0002] The induction vacuum quenching furnace currently working online uses NdFeB alloy castings as the material tank for raw materials. The unloading switch uses a vacuum gate valve to control the NdFeB alloy castings to enter the induction melting crucible for melting. Since there is still tiny dust on the surface of the NdFeB alloy castings, when passing through the vacuum gate valve, the tiny dust adheres to the surface of the gate, and the gate moves linearly in the gate slot, bringing the dust into the gate slot. Every 100 hours of production, the vacuum gate valve must be removed and the gate slot must be cleaned, which is time-consuming and labor-intensive, restricting normal production. Utility Model Content

[0003] The utility model provides a rotary arm type flap valve for an induction vacuum rapid quenching furnace, aiming to solve the above-mentioned problems.

[0004] The utility model is implemented as follows: a rotary arm flap valve for an induction vacuum rapid quenching furnace comprises a flap valve plate arranged at the bottom of a receiving hopper, wherein the receiving hopper is installed in a square transition box;

[0005] The front box plate and the rear box plate of the square transition box are respectively installed with a swing arm support bearing seat, a swing arm support shaft is arranged between the two swing arm support bearing seats, and a swing arm is installed on the swing arm support shaft;

[0006] The rotating arm and the flap valve plate are hingedly connected via a hinge seat;

[0007] The front box plate and the rear box plate of the square transition box are respectively installed with self-locking block support bearing seats, a self-locking block support shaft is arranged between the two self-locking block support bearing seats, and a self-locking block is installed on the self-locking block support shaft;

[0008] When the flap valve plate is in contact with the bottom of the receiving hopper, the self-locking block rotates to the bottom of the flap valve plate to lock the position of the flap valve plate.

[0009] Furthermore, the upper part of the square transition box is connected to the bottom of the circular material tank, and the lower part of the square transition box is connected to the induction vacuum rapid quenching furnace.

[0010] Furthermore, an O-ring is provided at the bottom of the receiving hopper.

[0011] Furthermore, three arch-breaking rods are arranged on the flap valve plate.

[0012] Furthermore, a rotating arm handle is fixedly connected to the rotating arm, and a self-locking block handle is fixedly connected to the self-locking block.

[0013] Furthermore, a maintenance sealing plate is provided on the left side of the square transition box, and a gas replacement valve is provided on the right side.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model discloses a swivel arm type flap valve for an induction vacuum rapid quenching furnace, which is installed between a material tank and a furnace body feeding port, and consists of a square transition box, a material receiving hopper, a swivel arm support shaft, a swivel arm handle, a swivel arm, a flap valve plate, a hinge seat, a self-locking block and a handle, a gas replacement device, a supporting bearing seat, an inspection sealing plate, a sealing O-ring, etc. The opening and closing of the casting sheet unloading process can be controlled by turning the handle, and it can replace the vacuum gate valve currently used online, and can be used without trouble for 60 furnaces, a total of about 6000 hours, and conveying 360 tons of casting sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] In the figure: 1-round material tank, 2-NdFeB casting sheet, 3-screw feeder, 4-connecting flange, 5-square transition box, 6-hopper, 7-swing arm support shaft, 8-swing arm handle, 9-swing arm support shaft seat, 10-swing arm, 11-gas replacement valve, 12-hinge seat, 13-induction vacuum rapid quenching furnace upper interface flange, 14-self-locking block support shaft seat, 15-self-locking block support shaft, 16-self-locking block, 17-self-locking block handle, 18-flap valve plate, 19-O-type sealing rubber ring, 20-arch breaking rod 20, 21-maintenance sealing plate. DETAILED DESCRIPTION

[0017] 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.

[0018] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0019] See also Figure 1The utility model provides a technical solution: a swivel arm flap valve for an induction vacuum quick quenching furnace, comprising a flap valve plate 18 arranged at the bottom of a receiving hopper 6, the receiving hopper 6 is installed in a square transition box 5; a swivel arm support bearing seat 9 is installed on the front box plate and the rear box plate of the square transition box 5, a swivel arm support shaft 7 is arranged between the two swivel arm support bearing seats 9, and a swivel arm 10 is installed on the swivel arm support shaft 7;

[0020] The rotating arm 10 and the flap valve plate 18 are hingedly connected via a hinge seat 12;

[0021] The front box plate and the rear box plate of the square transition box body 5 are respectively installed with self-locking block support bearing seats 14, a self-locking block support shaft 15 is arranged between the two self-locking block support bearing seats 14, and a self-locking block 16 is installed on the self-locking block support shaft 15;

[0022] When the flap valve plate 18 is in contact with the bottom of the receiving hopper 6 , the self-locking block 16 rotates to the bottom of the flap valve plate 18 to lock the position of the flap valve plate 18 .

[0023] Specifically, the upper part of the square transition box 5 is connected to the bottom of the circular material tank 1, and the lower part of the square transition box 5 is connected to the induction vacuum rapid quenching furnace. An O-ring 19 is provided at the bottom of the hopper 6, and three arch-breaking rods 20 are provided on the flap valve plate 18. A rotating arm handle 8 is fixedly connected to the rotating arm 10, and a self-locking block handle 17 is fixedly connected to the self-locking block 16. An inspection sealing plate 21 is provided on the left side of the square transition box 5, and a gas replacement valve 11 is provided on the right side.

[0024] In this embodiment, a circular material tank 1 for storing NdFeB casting sheets 2 is arranged above the induction vacuum rapid quenching furnace body, and a square transition box 5 equipped with a swing arm type flap valve is sealed and connected with the material tank in the form of a flange below, and a material receiving hopper 6 is arranged in the middle thereof, and an O-type rubber ring 19 for sealing is arranged on the flange below the material receiving hopper 6, which is used for sealing when the swing arm type flap valve is closed;

[0025] A valve plate rotating arm with a rotating handle is also provided. Its right end hole is installed on the supporting shaft and connected by a hinge. Both ends of the supporting shaft are installed on the plate surfaces in front and behind the square transition box by bearing seats. A flap valve plate with a hinge seat is also provided on the valve plate rotating arm. When the handle is rotated 90°, the rotating arm and the flap valve plate are synchronously rotated 90° with the rotating arm supporting shaft as the center of the circle, so as to realize the opening and closing of the NdFeB casting sheet unloading process.

[0026] In addition, three arch-breaking rods are arranged on the flap valve plate to eliminate the arching phenomenon of the NdFeB casting sheet during the flipping process; a self-locking block and a handle structure are also configured, the self-locking block hole is installed on another supporting shaft, connected by a hinge, and the two ends of the supporting shaft are installed on the front and rear plates of the square transition box by a bearing seat. When the handle is turned 90°, the self-locking block rotates 90° synchronously with the self-locking block supporting shaft as the center, implementing self-locking and unlocking of the rotating arm;

[0027] The flange at the lower end of the square transition box is sealed and connected to the top of the induction vacuum rapid quenching furnace body, and the NdFeB castings can directly fall into the melting crucible for melting; a square maintenance hole is reserved on the left side plate of the square transition box, which is sealed and connected to the maintenance sealing plate, and the internal facilities can be maintained when it is opened; a gas replacement device is also set on the right side panel to ensure that the gas pressure in the circular tank is equal to that of the furnace body when working.

[0028] When in use, after the last batch of production is completed, the next batch of production begins. First, the arm handle 8 is rotated clockwise, and the arm 10 is changed from a vertical position to a horizontal position, and the hinge seat 12 arranged thereon drives the flap valve plate 18 to synchronously change from a vertical position to a horizontal position.

[0029] The upper plane of the flap valve plate 18 is tightly fitted with the O-type sealing rubber ring 19 provided at the discharge port of the receiving hopper 6; the self-locking block handle 17 is rotated clockwise, and the self-locking block 16 is turned from a horizontal position to a vertical position, and its head cuts into the tail end of the rotating arm 8, presses the rotating arm 8 tightly and locks it, so that the upper plane of the flap valve plate 18 is tightly fitted and sealed with the O-type sealing rubber ring 19;

[0030] That is, the material is added: 500kg of NdFeB casting sheets 2 are prepared and loaded into the circular material tank 1. After completion, the feeding port of the circular material tank 1 is closed, and high-purity argon gas is filled to the set value after vacuuming. In addition, the gas replacement valve 11 is adjusted to keep the air pressure of the circular material tank 1 and the square transition box 5 equal, and the loading process is completed;

[0031] Then the unloading process begins: the self-locking block handle 17 is rotated counterclockwise, the self-locking block 16 is turned from a vertical position to a horizontal position, the rotating arm 10 is unlocked and can be rotated, and then the rotating arm handle 8 is rotated counterclockwise, the rotating arm 10 is turned from a horizontal position to a vertical position, and the linkage flap valve plate 18 is turned from a horizontal position to a vertical position through the hinge seat 12, and the discharge port of the receiving hopper 6 is opened; the screw feeder 3 is immediately started, and the NdFeB casting sheet 2 is transported to the discharge port of the receiving hopper 6 and directly falls into the melting crucible through the upper interface flange 13 of the induction vacuum rapid quenching furnace body to melt and enter the rapid quenching process of the NdFeB solution;

[0032] Sometimes in the process of feeding, the NdFeB casting sheet 2 may occasionally form an arch, which affects the continuous uniformity of feeding. At this time, the rotating arm handle 8 can be shaken back and forth to make the arch-breaking rod 20 on the flap cutting plate 18 shake back and forth to eliminate the arch phenomenon.

[0033] When 500kg of castings are unloaded, repeat the above process 12 times, and the induction vacuum rapid quenching furnace can work continuously for about 100 hours, with a single furnace output of 6000kg. The rotary arm flap is used to replace the vacuum gate valve working online, which can work without trouble for 60 furnaces without leakage.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary arm flap valve for an induction vacuum rapid quenching furnace, characterized in that: It includes a flap valve plate arranged at the bottom of the receiving hopper, and the receiving hopper is installed in a square transition box; The front box plate and the rear box plate of the square transition box are respectively installed with a swing arm support bearing seat, a swing arm support shaft is arranged between the two swing arm support bearing seats, and a swing arm is installed on the swing arm support shaft; The rotating arm and the flap valve plate are hingedly connected via a hinge seat; The front box plate and the rear box plate of the square transition box are respectively installed with self-locking block support bearing seats, a self-locking block support shaft is arranged between the two self-locking block support bearing seats, and a self-locking block is installed on the self-locking block support shaft; When the flap valve plate is in contact with the bottom of the receiving hopper, the self-locking block rotates to the bottom of the flap valve plate to lock the position of the flap valve plate.

2. The rotary arm flap valve for an induction vacuum rapid quenching furnace according to claim 1, characterized in that: The upper part of the square transition box is connected to the bottom of the circular material tank, and the lower part of the square transition box is connected to the induction vacuum rapid quenching furnace.

3. The swing arm flap valve for an induction vacuum rapid quenching furnace according to claim 1, characterized in that: An O-type sealing ring is arranged at the bottom of the receiving hopper.

4. The swing arm flap valve for an induction vacuum rapid quenching furnace according to claim 1, characterized in that: Three arch-breaking rods are arranged on the flap valve plate.

5. The swing arm flap valve for an induction vacuum rapid quenching furnace according to claim 1, characterized in that: A rotating arm handle is fixedly connected to the rotating arm, and a self-locking block handle is fixedly connected to the self-locking block.

6. The swing arm flap valve for an induction vacuum rapid quenching furnace according to claim 1, characterized in that: The left side of the square transition box is provided with an inspection sealing plate, and the right side is provided with a gas replacement valve.

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