Inflation valve of vacuum furnace

Abstract

The utility model provides a vacuum furnace inflation valve which comprises a pipeline assembly, the pipeline assembly comprises an upper pipeline, a transition pipeline and a lower pipeline, the lower pipeline is connected with a moving assembly, the moving assembly comprises a fixing ring, a spring and a sliding block, the sliding block is provided with a cavity, a vent hole and an air outlet, and the fixing ring is connected with the spring. The upper pipeline is provided with an air inlet hole, the air inlet hole is connected with a C-shaped pipe, and the C-shaped pipe is connected with the lower pipeline. When air enters the vacuum furnace, the sliding block descends through air pressure, after the sliding block descends to a certain distance, protective gas enters the C-shaped pipe and the transition pipeline through the air inlet hole and the air outlet respectively and finally enters the vacuum furnace through the lower pipeline, and when air is exhausted, the sliding block ascends through the air pressure, and when the air outlet and the air inlet hole coincide, the protective gas is exhausted. And gas enters the cavity of the sliding block through the C-shaped pipe and the branch pipe and is exhausted through the vent hole, the device achieves integration of inflation and exhaust, and the sealing sleeve can be replaced by disassembling the moving assembly.

Description

Technical Field

[0001] The utility model patent relates to the technical field of vacuum furnace equipment, mainly to a vacuum furnace charging valve. Background Art

[0002] When a vacuum furnace is working, it is often necessary to fill it with protective gas for processes such as debinding, so the charging valve is an indispensable component in the vacuum furnace equipment.

[0003] However, the existing inflation valves have a complex structure, and most of them are one-way vent valves. When the gas in the vacuum furnace needs to be discharged, other valves need to be used, which makes the structure of the vacuum furnace complex and leads to high manufacturing costs. In this regard, we propose a vacuum furnace inflation valve. Utility Model Content

[0004] The utility model mainly provides a vacuum furnace charging valve to solve the technical problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the following technical solution is provided: a vacuum furnace inflation valve, comprising a pipeline assembly, the pipeline assembly comprising an upper pipeline, a transition pipeline connected to the bottom of the upper pipeline and a lower pipeline connected to the bottom of the transition pipeline, the top of the lower pipeline is connected to a moving assembly, the moving assembly comprises a fixed ring connected to the top of the lower pipeline, a spring connected to the top of the fixed ring and a sliding block connected to the top of the spring, the top of the sliding block is provided with a cavity, the top of the sliding block is provided with a plurality of vents, and both sides of the sliding block are provided with air outlets;

[0006] Air inlet holes are arranged on both sides of the bottom of the upper pipe, one side of the air inlet hole is connected to the C-shaped pipe, and one side of the C-shaped pipe is connected to the air outlet hole arranged on the lower pipe.

[0007] Furthermore, the outer wall of the fixing ring is provided with an external thread;

[0008] The inner wall of the lower pipe is provided with an internal thread, and the internal thread is connected with the external thread.

[0009] Furthermore, a limiting ring is fixed at the bottom of the sliding block, the top of the limiting ring is connected to a sealing sleeve, and the sealing sleeve is sleeved on the outer wall of the sliding block.

[0010] Furthermore, a bracket is fixed on the inner wall of the fixing ring, and the bracket is cross-shaped.

[0011] Furthermore, a branch pipe is fixed on one side of the C-shaped pipe, and one side of the branch pipe is connected to a through hole provided in the transition pipe.

[0012] Furthermore, the distance between the air outlet and the upper surface of the sliding block is equal to the distance between the air inlet and the lower surface of the upper pipe.

[0013] Furthermore, support rods are fixed at the corners of the top and bottom of the C-shaped tube.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides a vacuum furnace inflation valve. When protective gas needs to be introduced into the vacuum furnace, the sliding block is lowered by air pressure, at which time the spring is compressed. After it falls to a certain distance, the protective gas enters the C-tube and the transition pipe through the air inlet and the air outlet respectively, and finally enters the vacuum furnace through the lower pipe. After the introduction is completed, the sliding block is reset by the elastic force of the spring. When the vacuum furnace needs to be exhausted, the sliding block is raised by air pressure. When the sliding block rises until the air outlet and the air inlet coincide with each other, the gas in the vacuum furnace enters the cavity of the sliding block through the C-tube and the branch pipe, and then is exhausted through the vent. The device not only realizes the integration of inflation and exhaust, but also has a simple structure and low cost. The sealing sleeve can be replaced by disassembling the moving component, which is convenient for maintenance of the device and greatly saves maintenance time.

[0016] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 A cross-sectional view of the utility model as a whole;

[0019] Figure 3 It is a schematic diagram of the overall structure of the utility model when viewed from above.

[0020] In the figure: 10, pipeline assembly; 11, upper pipeline; 111, air inlet; 12, transition pipeline; 13, lower pipeline; 20, C-type pipe; 21, branch pipe; 22, support rod; 30, moving assembly; 31, fixing ring; 311, bracket; 32, spring; 33, sliding block; 331, vent; 332, air outlet; 40, sealing sleeve. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0022] For example, please refer to Figure 1-3A vacuum furnace inflation valve comprises a pipeline assembly 10, wherein the pipeline assembly 10 comprises an upper pipeline 11, a transition pipeline 12 connected to the bottom of the upper pipeline 11 and a lower pipeline 13 connected to the bottom of the transition pipeline 12, wherein the top of the lower pipeline 13 is connected to a moving assembly 30, wherein the moving assembly 30 comprises a fixing ring 31 connected to the top of the lower pipeline 13, a spring 32 connected to the top of the fixing ring 31 and a sliding block 33 connected to the top of the spring 32, wherein a cavity is provided at the top of the sliding block 33, a plurality of vents 331 are provided at the top of the sliding block 33, and air outlets 332 are provided at both sides of the sliding block 33;

[0023] Air inlet holes 111 are provided at both sides of the bottom of the upper pipe 11 , one side of the air inlet hole 111 is connected to the C-shaped pipe 20 , and one side of the C-shaped pipe 20 is connected to the air outlet hole provided in the lower pipe 13 .

[0024] It should be noted that, in the embodiment, after the upper pipe 11 enters the protective gas, the sliding block 33 is lowered by air pressure, and the spring 32 is compressed. After it drops to a certain distance, the protective gas enters the C-shaped pipe 20 and the transition pipe 12 through the air inlet 111 and the air outlet 332, respectively, and finally enters the vacuum furnace through the lower pipe 13;

[0025] Furthermore, when the vacuum furnace needs to be exhausted, the sliding block 33 is raised by air pressure. When the sliding block 33 rises until the air outlet 332 and the air inlet 111 coincide with each other, the gas in the vacuum furnace enters the cavity of the sliding block 33 through the C-tube 20 and is discharged through the air vent 331.

[0026] For example, please refer to Figure 2-3 , the outer wall of the fixing ring 31 is provided with an external thread;

[0027] The inner wall of the lower pipe 13 is provided with an internal thread, and the internal thread is connected to the external thread.

[0028] It should be noted that, in the embodiment, the external thread of the fixing ring 31 matches the internal thread of the lower pipe 13 , so as to facilitate the installation and removal of the fixing ring 31 .

[0029] For example, please refer to Figure 2 A limiting ring is fixed at the bottom of the sliding block 33 , and a sealing sleeve 40 is connected to the top of the limiting ring. The sealing sleeve 40 is sleeved on the outer wall of the sliding block 33 .

[0030] It should be noted that, in the embodiment, the sealing sleeve 40 is convenient for enhancing the sealing performance of the sliding block 33 to avoid gas leakage.

[0031] For example, please refer to Figure 3 A bracket 311 is fixed on the inner wall of the fixing ring 31, and the bracket 311 is cross-shaped.

[0032] It should be noted that, in the embodiment, the bracket 311 improves the supporting capacity of the fixing ring 31 and facilitates the use of tools to rotate the fixing ring 31 so as to enter or leave the lower pipe 13, thereby facilitating the replacement of the sealing sleeve 40.

[0033] For example, please refer to Figure 1-2 A branch pipe 21 is fixed to one side of the C-shaped pipe 20 , and one side of the branch pipe 21 is connected to a through hole provided in the transition pipe 12 .

[0034] It should be noted that, in the embodiment, the branch pipe 21 facilitates the acceleration of the protective gas entering the vacuum furnace and the acceleration of the gas discharge in the vacuum furnace.

[0035] For example, please refer to Figure 2 The distance between the air outlet 332 and the upper surface of the sliding block 33 is equal to the distance between the air inlet 111 and the lower surface of the upper pipe 11.

[0036] It should be noted that, in the embodiment, when the sliding block 33 descends the distance, the gas outlet 332 and the gas inlet 111 are simultaneously in a conducting state, so that the protective gas can enter the vacuum furnace easily.

[0037] For example, please refer to Figure 1-2 Support rods 22 are fixed at the corners of the top and bottom of the C-shaped tube 20.

[0038] It should be noted that, in the embodiment, the support rod 22 is used to enhance the stability of the C-shaped tube 20 , so that the user can pick up the device through the C-shaped tube 20 .

[0039] The specific operation mode of the utility model is as follows:

[0040] When the protective gas needs to be introduced into the vacuum furnace, the sliding block 33 is lowered by air pressure, and the spring 32 is compressed. After the sliding block 33 is lowered to a certain distance, the protective gas enters the C-shaped tube 20 and the transition pipe 12 through the air inlet 111 and the air outlet 332, respectively, and finally enters the vacuum furnace through the lower pipe 13. After the introduction is completed, the sliding block 33 is reset by the elastic force of the spring 32.

[0041] When the vacuum furnace needs to be exhausted, the sliding block 33 is lifted by air pressure. When the sliding block 33 rises until the air outlet 332 and the air inlet 111 coincide with each other, the gas in the vacuum furnace enters the cavity of the sliding block 33 through the C-tube 20 and the branch pipe 21, and then is exhausted through the air vent 331.

[0042] The above-described embodiments only express the implementation methods of the present application, but for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A vacuum furnace charging valve, comprising a pipeline assembly (10), characterized in that: The pipeline assembly (10) comprises an upper pipeline (11), a transition pipeline (12) connected to the bottom of the upper pipeline (11) and a lower pipeline (13) connected to the bottom of the transition pipeline (12); the top of the lower pipeline (13) is connected to a moving assembly (30); the moving assembly (30) comprises a fixing ring (31) connected to the top of the lower pipeline (13), a spring (32) connected to the top of the fixing ring (31) and a sliding block (33) connected to the top of the spring (32); a cavity is provided at the top of the sliding block (33); a plurality of vents (331) are provided at the top of the sliding block (33); and air outlets (332) are provided at both sides of the sliding block (33); Air inlet holes (111) are provided on both sides of the bottom of the upper pipe (11), one side of the air inlet hole (111) is connected to the C-shaped pipe (20), and one side of the C-shaped pipe (20) is connected to the air outlet hole provided on the lower pipe (13).

2. A vacuum furnace charging valve according to claim 1, characterized in that: The outer wall of the fixing ring (31) is provided with an external thread; The inner wall of the lower pipe (13) is provided with an internal thread, and the internal thread is connected to the external thread.

3. A vacuum furnace charging valve according to claim 1, characterized in that: A limiting ring is fixed at the bottom of the sliding block (33), the top of the limiting ring is connected to a sealing sleeve (40), and the sealing sleeve (40) is sleeved on the outer wall of the sliding block (33).

4. A vacuum furnace charging valve according to claim 1, characterized in that: A bracket (311) is fixed on the inner wall of the fixing ring (31), and the bracket (311) is cross-shaped.

5. The vacuum furnace charging valve according to claim 1, characterized in that: A branch pipe (21) is fixed to one side of the C-shaped pipe (20), and one side of the branch pipe (21) is connected to a through hole provided in the transition pipe (12).

6. A vacuum furnace charging valve according to claim 1, characterized in that: The distance between the air outlet (332) and the upper surface of the sliding block (33) is equal to the distance between the air inlet (111) and the lower surface of the upper pipe (11).

7. A vacuum furnace charging valve according to claim 5, characterized in that: Support rods (22) are fixed at the corners of the top and bottom of the C-shaped tube (20).

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