Anti-blocking oxygen concentration sampling device for brazing furnace

Abstract

The utility model provides an anti-blocking oxygen concentration sampling device for a brazing furnace, which is communicated with a furnace chamber of the brazing furnace and comprises a plurality of sampling components, an oxygen monitoring component and a nitrogen inflating component, the plurality of sampling components are communicated with the furnace chamber of the brazing furnace, each sampling component comprises a gas path switching device, and the nitrogen inflating component is communicated with the furnace chamber of the brazing furnace. The gas path switching device is communicated with the furnace chamber through a pipeline, and the gas path switching device is connected with the oxygen monitoring assembly and the nitrogen inflating assembly in a switchable manner through pipelines; and the plurality of sampling assemblies are respectively communicated with the furnace chamber by switching the oxygen monitoring assembly or the nitrogen inflating assembly through the gas path switching device. According to the anti-blocking oxygen concentration sampling device for the brazing furnace, reverse blowing can be achieved when sampling is not carried out, brazing flux dust in a pipeline is blown out, the situation that the brazing flux dust is accumulated to block the pipeline is prevented, monitoring accuracy is improved, and cleaning can be carried out without shutdown.

Description

Technical Field

[0001] The utility model relates to the technical field of brazing furnaces, and more precisely to a brazing furnace anti-blocking oxygen concentration sampling device. Background Art

[0002] A vacuum brazing furnace is a large-scale heat treatment device capable of performing processing operations such as vacuum brazing, vacuum annealing, and vacuum aging. The vacuum brazing furnace is mainly used for brazing and vacuum tempering workpieces made of materials such as aluminum alloy, stainless steel, and titanium alloy. The atmosphere inside the vacuum brazing furnace needs to be strictly controlled, reducing the content of oxidants such as oxygen and water vapor to a minimum, and filling inert gases such as nitrogen to prevent oxidation, thereby ensuring the formation of a firm welded joint.

[0003] In order to effectively control the oxygen content inside the brazing furnace, it is necessary to accurately monitor the oxygen content inside the furnace. The existing oxygen content monitoring scheme is to connect an oxygen monitoring device to the furnace chamber through a pipeline, and the oxygen monitoring device pumps in a part of the air in the furnace chamber for detection. After long-term use, this scheme is prone to pipeline blockage due to the flux entering the pipeline. In addition, in order to accurately monitor the oxygen content at different positions inside the brazing furnace, multiple oxygen monitoring devices connected to the furnace chamber need to be set up. After long-term use, multiple pipelines need to be cleaned, which is time-consuming and laborious. If not cleaned in time, it will also affect the accuracy of monitoring.

[0004] In summary, the existing oxygen content monitoring device for brazing furnaces in this field needs to be improved to prevent blockage of the monitoring pipeline while ensuring the monitoring accuracy. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a brazing furnace anti-blocking oxygen concentration sampling device, including a plurality of sampling components connected to the furnace chamber of the brazing furnace. The plurality of sampling components are all connected to an oxygen monitoring component and a nitrogen gas charging component. The sampling components control the switching of the oxygen monitoring component or the nitrogen gas charging component to be connected to the furnace chamber, and complete the oxygen sampling and monitoring or the blowing operation to prevent flux accumulation.

[0006] To achieve the above purpose, the utility model provides a brazing furnace anti-blocking oxygen concentration sampling device, which is connected to the furnace chamber of the brazing furnace, including a plurality of sampling components, an oxygen monitoring component, and a nitrogen gas charging component. The plurality of sampling components are connected to the furnace chamber of the brazing furnace. The sampling components include a gas path switching device. The gas path switching device is connected to the furnace chamber through a pipeline, and the gas path switching device is connected to the oxygen monitoring component and the nitrogen gas charging component through a pipeline in a switchable manner. The plurality of sampling components respectively switch the oxygen monitoring component or the nitrogen gas charging component to be connected to the furnace chamber through the gas path switching device.

[0007] Preferably, the sampling assembly includes the gas path switching device, the monitoring pipe, the blowing pipe, and the furnace chamber pipe. The gas path switching device is communicated with the furnace chamber pipe, the furnace chamber pipe is communicated with the furnace chamber through the connection end, the gas path switching device is switchably connected with the monitoring pipe and the blowing pipe, the monitoring pipe is communicated with the oxygen monitoring assembly, and the blowing pipe is communicated with the nitrogen gas charging assembly.

[0008] Preferably, the gas path switching device is a three-way solenoid valve.

[0009] Preferably, a sampling filter is integrally provided on the furnace chamber pipe.

[0010] Preferably, the monitoring pipe, the blowing pipe, and the furnace chamber pipe are all nylon pipes.

[0011] Preferably, the oxygen monitoring assembly includes a sampling pipe, a sampling pump, a flow meter, and an oxygen concentration meter that are connected in sequence. The sampling pump is connected to the sampling pipe through a connecting pipe, and the sampling assembly is connected to the sampling pipe through the monitoring pipe.

[0012] Preferably, a filter is installed on the connecting pipe.

[0013] Preferably, the sampling pipe is a stainless steel pipe, and the connecting pipe is a nylon pipe.

[0014] Preferably, the nitrogen gas charging assembly includes a nitrogen gas source and a nitrogen gas pipe connecting the nitrogen gas source. The sampling assembly is connected to the nitrogen gas pipe through the blowing pipe.

[0015] Compared with the prior art, the advantages of a brazing furnace anti-blocking oxygen concentration sampling device disclosed by the present utility model are as follows: the brazing furnace anti-blocking oxygen concentration sampling device can blow air reversely when not sampling to blow out the flux dust in the pipeline, prevent the flux dust from accumulating and blocking the pipeline, which is beneficial to ensuring the accuracy of monitoring and does not require shutdown for cleaning; the brazing furnace anti-blocking oxygen concentration sampling device can monitor the oxygen content at specific furnace chamber positions, and the use and operation are more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for describing the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] As Figure 1 shown is a schematic structural diagram of a brazing furnace anti-blocking oxygen concentration sampling device of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] As Figure 1 shown, an anti-blocking oxygen concentration sampling device for a brazing furnace of the present application is combined with the brazing furnace 1, and includes a plurality of sampling components 2, an oxygen monitoring component 3 and a nitrogen gas charging component 4. The plurality of sampling components 2 are communicated with the furnace cavity of the brazing furnace 1. The sampling component 2 includes a gas path switching device 21. The gas path switching device 21 is communicated with the furnace cavity of the brazing furnace 1 through a pipeline, and the gas path switching device 21 is switchably connected to the oxygen monitoring component 3 and the nitrogen gas charging component 4 through a pipeline. The plurality of sampling components 2 respectively switch the oxygen monitoring component 3 or the nitrogen gas charging component 4 to be communicated with the furnace cavity through the gas path switching device 21. When it is necessary to monitor the oxygen concentration at a certain position, the sampling component 2 here controls the furnace cavity to be communicated with the oxygen monitoring component 3 through the gas path switching device 21, and the oxygen monitoring component 3 monitors the oxygen concentration. Other sampling components 2 control the furnace cavity to be communicated with the nitrogen gas charging component 4 through the gas path switching device 21, and the nitrogen gas charging component 4 blows air into the furnace cavity through the sampling component 2 to blow the brazing flux in the corresponding pipeline back into the furnace cavity to prevent the brazing flux from blocking the pipeline after long-term use.

[0020] The anti-blocking oxygen concentration sampling device for the brazing furnace can blow air reversely when not sampling, blow out the brazing flux dust in the pipeline, prevent the accumulation of brazing flux dust from blocking the pipeline, is beneficial to ensuring the accuracy of monitoring, and does not require shutdown for cleaning; the anti-blocking oxygen concentration sampling device for the brazing furnace can monitor the oxygen content at a specific furnace cavity position, and the use operation is more flexible and convenient.

[0021] Specifically, the sampling component 2 includes a gas path switching device 21, a monitoring pipe 22, a blowing pipe 23 and a furnace cavity pipe 24. The gas path switching device 21 is a three-way solenoid valve. The gas path switching device 21 is communicated with the furnace cavity pipe 24. The furnace cavity pipe 24 is communicated with the furnace cavity through a connection end 20. The gas path switching device 21 is switchably connected to the monitoring pipe 22 and the blowing pipe 23. The monitoring pipe 22 is communicated with the oxygen monitoring component 3, and the blowing pipe 23 is communicated with the nitrogen gas charging component 4. Preferably, a sampling filter 25 is integrally provided on the furnace cavity pipe 24 to prevent the brazing flux from reaching the gas path switching device 21 when monitoring the oxygen concentration.

[0022] Preferably, the monitoring pipe 22, the blowing pipe 23 and the furnace cavity pipe 24 are all nylon pipes. The nylon pipe material is relatively soft, which is convenient for laying the pipeline according to the application scenario.

[0023] The oxygen monitoring component 3 includes a sampling tube 35, a sampling pump 31, a flowmeter 33, and an oxygen concentration meter 32 that are connected in sequence. The sampling pump 31 is connected to the sampling tube 35 through a connecting tube 26, and the sampling component 2 is connected to the sampling tube 35 through a monitoring tube 22. Preferably, a filter 34 is installed on the connecting tube 26 to prevent the flux from entering the sampling pump 31, extend the service life of the sampling pump 31, and at the same time increase the monitoring accuracy of the oxygen concentration. The sampling tube 35 is preferably a stainless steel tube, and the connecting tube 36 is preferably a nylon tube.

[0024] The nitrogen gas filling component 4 includes a nitrogen gas source 41 and a nitrogen gas tube 42 connected to the nitrogen gas source 41. The sampling component 2 is connected to the nitrogen gas tube 42 through a blowing tube 23.

[0025] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A brazing furnace anti-blocking oxygen concentration sampling device, characterized in that, It is connected to the furnace chamber of the brazing furnace, and includes a number of sampling components, an oxygen monitoring component, and a nitrogen gas charging component. The number of the sampling components is connected to the furnace chamber of the brazing furnace. The sampling component includes a gas path switching device. The gas path switching device is connected to the furnace chamber through a pipeline, and the gas path switching device is connected to the oxygen monitoring component and the nitrogen gas charging component through a pipeline in a switchable manner; the number of the sampling components respectively switch the oxygen monitoring component or the nitrogen gas charging component to be connected to the furnace chamber through the gas path switching device.

2. The oxygen concentration sampling device for preventing blockage in a brazing furnace according to claim 1, wherein The sampling component includes the gas path switching device, a monitoring pipe, a blowing pipe, and a furnace chamber pipe. The gas path switching device is connected to the furnace chamber pipe. The furnace chamber pipe is connected to the furnace chamber through a connection end. The gas path switching device is connected to the monitoring pipe and the blowing pipe in a switchable manner. The monitoring pipe is connected to the oxygen monitoring component, and the blowing pipe is connected to the nitrogen gas charging component.

3. The oxygen concentration sampling device for preventing blockage of the brazing furnace according to claim 2, characterized in that, The gas path switching device is a three-way solenoid valve.

4. The oxygen concentration sampling device for preventing blockage of a brazing furnace according to claim 2, characterized in that A sampling filter is integrally provided on the furnace chamber pipe.

5. The brazing furnace anti-blocking oxygen concentration sampling device according to claim 2, characterized in that, The monitoring pipe, the blowing pipe, and the furnace chamber pipe are all nylon pipes.

6. The brazing furnace anti-blocking oxygen concentration sampling device according to claim 2, characterized in that, The oxygen monitoring component includes a sampling pipe, a sampling pump, a flow meter, and an oxygen concentration meter that are connected in sequence. The sampling pump is connected to the sampling pipe through a connecting pipe. The sampling component is connected to the sampling pipe through the monitoring pipe.

7. The oxygen concentration sampling device for preventing blockage of the brazing furnace according to claim 6, characterized in that, A filter is installed on the connecting pipe.

8. The oxygen concentration sampling device for preventing blockage of the brazing furnace according to claim 6, characterized in that, The sampling pipe is a stainless steel pipe, and the connecting pipe is a nylon pipe.

9. The oxygen concentration sampling device for preventing blockage of the brazing furnace according to claim 2, characterized in that, The nitrogen gas charging component includes a nitrogen gas source and a nitrogen gas pipe connecting the nitrogen gas source. The sampling component is connected to the nitrogen gas pipe through the blowing pipe.

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