Gas pressure stabilizing device for nitriding furnace

Abstract

The utility model relates to the technical field of nitriding furnaces, in particular to a gas pressure stabilizing device for a nitriding furnace, which comprises a box body, a gas outlet pipe extending to the outside of the box body is arranged in the box body, a first barrel and a second barrel are arranged in the box body, and the first barrel and the second barrel are communicated with the gas outlet pipe. The first barrel is of an open structure with the bottom end open, the second barrel is of a semi-closed structure with the bottom end provided with a through hole, a first piston is arranged in the first barrel, a second piston is arranged in the second barrel, and air holes are formed in the lower side of the first piston and the upper side of the second piston in a penetrating mode. Through the cooperation of the first barrel, the second barrel, the first piston, the second piston, the first connecting rod, the second connecting rod and the connecting shaft, gas can be exhausted from the gas outlet pipe when the pressure in the box body is increased, so that the nitriding furnace is subjected to quick pressure relief, automatic and quick pressure stabilizing operation can be realized, the production quality is improved, and the use safety is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitrogenization furnace technical field, specifically disclose a gas pressure stabilizing device for nitrogenization furnace. BACKGROUND

[0002] The silicon nitride powder is used as the release agent of silicon ingot in the photovoltaic industry, is used as the fluorescent powder and the sputtering target material in the experiment stage, can be used to make the artificial joint in medical engineering, and is used for the sintering of ceramic such as bearing ball, ceramic cutter, thermocouple protection tube and lifting tube. As the powder raw material for ceramic sintering, the stability of product quality is very important.

[0003] In the production of silicon nitride powder by the silicon powder nitriding method, the nitrogen flow and the nitrogen pressure in the furnace body play a crucial role in the stability of the powder quality. The existing nitrogenization furnace generally controls the nitrogen flow through a flow meter and stabilizes the nitrogen pressure in the furnace body through a manual air release hole. The nitrogen pressure in the nitrogenization furnace increases with the increase of the temperature in the furnace, and it is difficult to maintain the stability of the nitrogen pressure in the furnace through the manual air release hole. Therefore, a gas pressure stabilizing device for nitrogenization furnace is needed to solve this problem. SUMMARY

[0004] The utility model discloses a gas pressure stabilizing device for nitrogenization furnace, when the pressure in the box is too high, through the relative movement of first piston and second piston, the gas outlet pipe is communicated with the box, the box is rapidly pressure released, can realize the automatic quick pressure stabilizing operation, has improved production quality, has guaranteed the use security.

[0005] The utility model discloses a gas pressure stabilizing device for nitrogenization furnace, when the pressure in the box is too high, through the relative movement of first piston and second piston, the gas outlet pipe is communicated with the box, the box is rapidly pressure released, can realize the automatic quick pressure stabilizing operation, has improved production quality, has guaranteed the use security.

[0006] The lower side of the box is fixedly connected with a connecting shaft, the outer wall of the connecting shaft is rotatably connected with a rotating rod, the both ends of the outer wall of the rotating rod are provided with slot holes, and the two rectangular rings are slidably connected with the two slot holes respectively.

[0007] In order to facilitate the adjustment pressure relief, as a kind of gas pressure stabilizing device for nitriding furnace of the utility model preferably, the upper side of the box is threadedly connected with threaded rod, the lower end of the threaded rod is fixedly connected with the pressing plate located in the first cylinder, and the lower end surface of the pressing plate is provided with spring between the first piston.

[0008] In order to facilitate the sealing of the second cylinder, as a kind of gas pressure stabilizing device for nitriding furnace of the utility model preferably, the second connecting rod is provided with sealing ring between the through hole.

[0009] In order to facilitate the connection of the device in nitriding furnace, as a kind of gas pressure stabilizing device for nitriding furnace of the utility model preferably, the left and right sides of the box are fixedly connected with flange.

[0010] In order to facilitate the rotation of threaded rod, as a kind of gas pressure stabilizing device for nitriding furnace of the utility model preferably, the upper end of the threaded rod is fixedly connected with knob.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] The gas pressure stabilizing device for nitriding furnace can communicate the gas outlet pipe with the outside when the pressure in the box increases, so that the gas in the box is discharged from the gas outlet pipe, the nitriding furnace is rapidly relieved, the automatic and rapid pressure stabilizing operation is realized, the production quality is improved, and the use safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the overall structural drawing of the utility model a kind of gas pressure stabilizing device for nitriding furnace;

[0014] Fig. 2 It is the sectional view of the utility model a kind of gas pressure stabilizing device for nitriding furnace;

[0015] Fig. 3 It is the structure diagram of the first piston of the utility model.

[0016] In the drawing, 1, box;2, gas outlet pipe;3, first cylinder;4, second cylinder;5, first piston;6, second piston;7, air hole;8, first connecting rod;9, second connecting rod;10, connecting shaft;11, rotating rod;12, slot;13, threaded rod;14, pressing plate;15, spring;16, rectangular ring. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples.

[0018] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, in the description of the utility model, the meaning of "a plurality of" is two or more than two, unless otherwise specifically limited.

[0019] Please refer to Figs. 1-3 A gas pressure stabilizing device for a nitriding furnace, comprising a box body 1, the inside of the box body 1 is provided with a gas outlet pipe 2 extending to the outside of the box body 1, the inside of the box body 1 is provided with a first cylinder 3 and a second cylinder 4, the first cylinder 3 and the second cylinder 4 are communicated with the gas outlet pipe 2, the first cylinder 3 is an open structure with an open bottom end, the second cylinder 4 is a semi-closed structure with a through hole at the bottom end, the inside of the first cylinder 3 is provided with a first piston 5, the inside of the second cylinder 4 is provided with a second piston 6, the lower side of the first piston 5 and the upper side of the second piston 6 are both provided with a gas hole 7, the lower end surface of the first piston 5 is fixedly connected with a first connecting rod 8, the lower end surface of the second piston 6 is fixedly connected with a second connecting rod 9 extending to the outside of the second cylinder 4 through the through hole, and the lower end surfaces of the first connecting rod 8 and the second connecting rod 9 are both fixedly connected with a rectangular ring 16.

[0020] The lower side in the box body 1 is fixedly connected with a connecting shaft 10, the outer wall of the connecting shaft 10 is rotatably connected with a rotating rod 11, the both ends of the outer wall of the rotating rod 11 are both provided with a slot hole 12, and the two rectangular rings 16 are slidably connected with the two slot holes 12 respectively.

[0021] In the embodiment, when the pressure in the box 1 is too high, the high-pressure gas pushes the first piston 5 to move upward, and then the air hole 7 at the lower side of the first piston 5 is communicated with the gas outlet pipe 2, when the first piston 5 moves upward, the first connecting rod 8 is further driven to move upward, and then the rotating rod 11 is driven to rotate clockwise through the rectangular ring 16, the second connecting rod 9 is further driven to move downward through the rectangular ring 16, and then the second piston 6 is driven to move downward, so that the air hole 7 at the upper side of the second piston 6 is communicated with the gas outlet pipe 2, thereby the gas outlet pipe 2 is communicated with the outside, the gas in the box 1 is discharged from the gas outlet pipe 2, the nitrogen furnace is rapidly depressurized, the automatic and rapid pressure stabilizing operation can be realized, the production quality is improved, and the use safety is ensured.

[0022] As a technical optimization scheme of the utility model, the upper side of the box 1 is screw-connected with a threaded rod 13, the lower end of the threaded rod 13 is fixedly connected with a pressing plate 14 located in the first cylinder 3, and the lower end surface of the pressing plate 14 is provided with a spring 15 between the first piston 5.

[0023] In the embodiment, the threaded rod 13 is rotated, the threaded rod 13 drives the pressing plate 14 to move downward, thereby the spring 15 is compressed, the pressure required when the first piston 5 rises is increased, and the maximum pressure during pressure relief can be adjusted according to the requirement by rotating the threaded rod 13.

[0024] As a technical optimization scheme of the utility model, the second connecting rod 9 is provided with a sealing ring between the through hole.

[0025] In the embodiment, the sealing ring is arranged between the second connecting rod 9 and the through hole, so that the sealing property between the second connecting rod 9 and the second cylinder 4 is good.

[0026] As a technical optimization scheme of the utility model, the left and right sides of the box 1 are fixedly connected with flanges.

[0027] In the embodiment, the flanges are fixedly connected on the left and right sides of the box 1, so that the box 1 can be connected to the pressure relief pipeline of the nitrogen furnace through the flanges.

[0028] As a technical optimization scheme of the utility model, the upper end of the threaded rod 13 is fixedly connected with a knob.

[0029] In the embodiment, the threaded rod 13 is rotated through the knob, which is time-saving and labor-saving.

[0030] The utility model discloses a working principle: when the pressure in box 1 is too high, high pressure gas promotes first piston 5 to move upwards, and then makes the air hole 7 of first piston 5 downside and outlet pipe 2 intercommunication, when first piston 5 moves upwards, further drive first connecting rod 8 to move upwards, and then drive rotating rod 11 clockwise through rectangular ring 16, and rotating rod 11 further drive second connecting rod 9 to move downwards through rectangular ring 16, and then drive second piston 6 to move downwards, make the air hole 7 of second piston 6 upside and outlet pipe 2 intercommunication, so that outlet pipe 2 and outside intercommunication, and the gas in box 1 is discharged from outlet pipe 2, make nitrogen furnace carry out fast pressure relief, can realize automatic fast steady voltage operation, improve production quality, and guarantee use security.

[0031] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A gas pressure stabilizing device for a nitriding furnace comprising a box (1), characterized in that: The inside of the box (1) is provided with an air outlet pipe (2) extending to the outside of the box (1), the inside of the box (1) is provided with a first cylinder (3) and a second cylinder (4), the first cylinder (3) and the second cylinder (4) communicate with the air outlet pipe (2), the first cylinder (3) is an open structure with an open bottom end, the second cylinder (4) is a semi-closed structure with a through hole at the bottom end, the inside of the first cylinder (3) is provided with a first piston (5), the inside of the second cylinder (4) is provided with a second piston (6), the lower side of the first piston (5) and the upper side of the second piston (6) are both provided with air holes (7), the lower end surface of the first piston (5) is fixedly connected with a first connecting rod (8), the lower end surface of the second piston (6) is fixedly connected with a second connecting rod (9) extending to the outside of the second cylinder (4) through the through hole, and the lower end surfaces of the first connecting rod (8) and the second connecting rod (9) are both fixedly connected with a rectangular ring (16). The lower side of the inside of the box (1) is fixedly connected with a connecting shaft (10), the outer wall of the connecting shaft (10) is rotatably connected with a rotating rod (11), the both ends of the outer wall of the rotating rod (11) are both provided with slot holes (12), and the two rectangular rings (16) are respectively slidably connected with the two slot holes (12).

2. The gas pressure stabilizing device for a nitriding furnace according to claim 1, characterized by: The upper side of the box (1) is threadedly connected with a threaded rod (13), the lower end of the threaded rod (13) is fixedly connected with a pressing plate (14) located in the inside of the first cylinder (3), and the lower end surface of the pressing plate (14) is provided with a spring (15) between the first piston (5).

3. The gas pressure stabilizing device for a nitriding furnace according to claim 1, characterized by: The second connecting rod (9) and the through hole are provided with a sealing ring.

4. The gas pressure stabilizing device for a nitriding furnace according to claim 1, characterized by: The left and right sides of the box (1) are both fixedly connected with flanges.

5. The gas pressure stabilizing device for a nitriding furnace according to claim 2, characterized by: The upper end of the threaded rod (13) is fixedly connected with a knob.

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