On-line oxygen content detection device for plasma welding box furnace chamber

Abstract

The utility model discloses an on-line oxygen content detection device for a plasma welding box furnace chamber, which comprises a furnace chamber, one end of the top of the furnace chamber is fixedly connected with an electric baffle valve, the other end of the electric baffle valve is connected with a first pipeline, and one side of the first pipeline far away from the electric baffle valve is connected with a primary vacuum filter. The other side of the primary vacuum filter is connected with a second pipeline, a first ball valve is arranged on the second pipeline, the first ball valve is connected with a secondary precision filter through the second pipeline, the secondary precision filter is connected with a sampling pump through a flexible pipeline, and the sampling pump is connected with an oxygen analyzer through a flexible pipeline. The oxygen content of the electrode welding furnace chamber is detected in the whole process, so that the electrode oxidation risk in the welding process is reduced to the maximum extent, and the electrode welding quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to non ferrous metal equipment technical field relates to the device for the oxygen content on line detection of plasma welding box furnace chamber. BACKGROUND

[0002] Titanium alloy has been widely used in aerospace, ship, chemical industry, biological medicine and other fields due to its low density, high strength, good corrosion resistance, excellent biocompatibility and other characteristics. Titanium is a high-activity metal, which will react violently with oxygen, nitrogen and other gases at high temperature. Welding such metal in the atmosphere will completely embrittle the weld, so welding must be carried out in a non-atmospheric environment.

[0003] At present, in the titanium alloy processing technology in China, the titanium alloy electrode generally adopts vacuum plasma arc welding technology for production. The electrode is welded in a vacuum environment or inert gas protection environment to avoid weld oxidation. In actual production work, a vacuum plasma welding box is mainly used to weld the electrode. At present, the existing technology can only realize intermittent oxygen content detection during the welding process, and cannot realize online continuous detection. Vacuum equipment often leaks due to various reasons, resulting in weld oxidation during the welding process. However, it is too late to avoid such situations from happening in advance, which affects the quality of the electrode. UTILITARIAN CONTENT

[0004] The utility model aims at providing the device for the oxygen content on line detection of plasma welding box furnace chamber, solves the problem of unable to realize online continuous detection of furnace chamber oxygen content in the prior art.

[0005] The utility model adopts the technical scheme, the device for the oxygen content on line detection of plasma welding box furnace chamber, including the furnace chamber, one end fixedly connected with the electric baffle valve at the top of the furnace chamber, the other end of the electric baffle valve is connected with the first pipe, the first pipe is connected with the first stage vacuum filter on the side away from the electric baffle valve, the other side of the first stage vacuum filter is connected with the second pipe, the first ball valve is arranged on the second pipe, the first ball valve is connected with the second stage precision filter through the second pipe, the second stage precision filter is connected with the sampling pump through the flexible pipe, the sampling pump is connected with the oxygen analyzer through the flexible pipe.

[0006] The utility model has the characteristics that:

[0007] The second ball valve is arranged on the pipeline away from the sampling pump on the side of the oxygen analyzer.

[0008] The third stage precision filter is further arranged between the sampling pump and the oxygen analyzer.

[0009] The flow meter is further arranged between the sampling pump and the third stage precision filter, and the flow meter and the third stage precision filter are connected in parallel.

[0010] A third ball valve is installed on the pipe on the side of the flow meter away from the sampling pump.

[0011] The primary vacuum filter uses a paper filter element; the secondary and tertiary precision filters use high-molecular-weight PE filter elements.

[0012] A welding torch is fixedly connected to the inner wall of the furnace.

[0013] The electrodes are held in the furnace chamber by special electrode clamps.

[0014] The beneficial effects of this utility model are:

[0015] This invention relates to an online oxygen content detection device for plasma welding furnace chambers. By adding an online oxygen content detection system during the welding process of titanium alloy electrodes, it solves the problem of the inability to continuously detect the oxygen content in the furnace chamber during the electrode welding process. This enables full-process detection of oxygen content in the electrode welding furnace chamber, thereby minimizing the risk of electrode oxidation during the welding process and improving the electrode welding quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the online oxygen content detection device for plasma welding oven chambers according to this utility model.

[0017] In the diagram, 1. Furnace chamber, 2. Electrode, 3. Welding torch, 4. Electric baffle valve, 5. First pipeline, 6. Primary vacuum filter, 7. First ball valve, 8. Secondary precision filter, 9. Sampling pump, 10. Tertiary precision filter, 11. Flow meter, 12. Oxygen analyzer; 13. Second pipeline; 14. Second ball valve; 15. Third ball valve. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] For online oxygen content detection devices in plasma welding furnace chambers, such as Figure 1 As shown, the furnace includes a furnace chamber 1. An electric baffle valve 4 is fixedly connected to one end of the top of the furnace chamber 1. The electric baffle valve 4 is operated and controlled via a host computer interface. The other end of the electric baffle valve 4 is connected to a first pipe 5. A primary vacuum filter 6 is connected to the side of the first pipe 5 away from the electric baffle valve 4. The primary vacuum filter 6 filters metal dust from the gas in the furnace chamber 1. The other side of the primary vacuum filter 6 is connected to a second pipe 13. A first ball valve 7 is installed on the second pipe 13. The first ball valve 7 is connected to a secondary precision filter 8 through the second pipe 13. The secondary precision filter 8 is connected to a sampling pump 9 through a flexible pipe. The sampling pump 9 is connected to an oxygen analyzer 12 through a flexible pipe.

[0020] A second ball valve 14 is installed on the pipeline on the side of the oxygen analyzer 12 away from the sampling pump 9.

[0021] A three-stage precision filter 10 is installed between the sampling pump 9 and the oxygen analyzer 12. A flow meter 11 is also installed between the sampling pump 9 and the three-stage precision filter 10. The flow meter 11 is used to determine whether the electric baffle valve 4 can be opened to start online detection. The flow meter 11 is connected in parallel with the three-stage precision filter 10. A third ball valve 15 is installed on the pipeline of the flow meter 11 away from the sampling pump 9. The filter element of the first-stage vacuum filter 6 is a paper filter element with a filtration accuracy of 5μm. The filter elements of the second-stage precision filter 8 and the third-stage precision filter 10 are high-molecular PE filter elements with a filtration accuracy of 5μm. The function of the second-stage precision filter 8 is to provide relatively pure gas to the sampling pump 9, and the function of the third-stage precision filter 10 is to provide pure and impurity-free gas to the oxygen analyzer 12 to ensure the reliability of continuous detection by the oxygen analyzer 12.

[0022] A welding torch 3 is fixedly connected to the inner wall of the furnace chamber 1, and an electrode 2 is held in the furnace chamber 1 by a special electrode clamp.

[0023] During operation, the electric damper valve connects the furnace chamber to the online oxygen content monitoring system. This valve is closed during furnace evacuation, venting, and argon purging. When the furnace chamber argon purging pressure reaches 82 kPa, the online oxygen content monitoring system is activated. The sampling pump first purges the air from the system pipeline. At this point, the position of the float in the flowmeter can be observed to determine if the conditions for furnace chamber oxygen content monitoring are met. If so, the electric damper valve is activated to perform online monitoring of the oxygen content in the furnace chamber during the welding process. The primary vacuum filter is mainly used to filter oil fumes and volatile particulate matter generated during the welding process in the furnace chamber. The secondary and tertiary precision filters are mainly used to further filter the gas being tested, ensuring high purity, accurate detection data, and extending the service life of the oxygen analyzer.

[0024] Example 1

[0025] For online oxygen content detection devices in plasma welding furnace chambers, such as Figure 1 As shown, the furnace includes a furnace chamber 1. An electric baffle valve 4 is fixedly connected to one end of the top of the furnace chamber 1. The electric baffle valve 4 is operated and controlled via a host computer interface. The other end of the electric baffle valve 4 is connected to a first pipe 5. A primary vacuum filter 6 is connected to the side of the first pipe 5 away from the electric baffle valve 4. The primary vacuum filter 6 filters metal dust from the gas in the furnace chamber 1. The other side of the primary vacuum filter 6 is connected to a second pipe 13. A first ball valve 7 is installed on the second pipe 13. The first ball valve 7 is connected to a secondary precision filter 8 through the second pipe 13. The secondary precision filter 8 is connected to a sampling pump 9 through a flexible pipe. The sampling pump 9 is connected to an oxygen analyzer 12 through a flexible pipe.

[0026] Example 2

[0027] An on-line detection device for oxygen content in a plasma welding box furnace chamber, as shown in Figure 1 The device comprises a furnace chamber 1, one end of the top of the furnace chamber 1 is fixedly connected with an electric damper valve 4, the electric damper valve 4 is controlled by an upper computer interface, the other end of the electric damper valve 4 is connected with a first pipeline 5, one side of the first pipeline 5 away from the electric damper valve 4 is connected with a first-stage vacuum filter 6, the first-stage vacuum filter 6 filters metal dust in gas from the furnace chamber 1, the other side of the first-stage vacuum filter 6 is connected with a second pipeline 13, the second pipeline 13 is provided with a first ball valve 7, the first ball valve 7 is connected with a second-stage precision filter 8 through the second pipeline 13, the second-stage precision filter 8 is connected with a sampling pump 9 through a flexible pipeline, the sampling pump 9 is connected with an oxygen analyzer 12 through a flexible pipeline.

[0028] The oxygen analyzer 12 is provided with a second ball valve 14 on a pipeline away from the sampling pump 9.

[0029] Example 3

[0030] An on-line detection device for oxygen content in a plasma welding box furnace chamber, as shown in Figure 1 The device comprises a furnace chamber 1, one end of the top of the furnace chamber 1 is fixedly connected with an electric damper valve 4, the electric damper valve 4 is controlled by an upper computer interface, the other end of the electric damper valve 4 is connected with a first pipeline 5, one side of the first pipeline 5 away from the electric damper valve 4 is connected with a first-stage vacuum filter 6, the first-stage vacuum filter 6 filters metal dust in gas from the furnace chamber 1, the other side of the first-stage vacuum filter 6 is connected with a second pipeline 13, the second pipeline 13 is provided with a first ball valve 7, the first ball valve 7 is connected with a second-stage precision filter 8 through the second pipeline 13, the second-stage precision filter 8 is connected with a sampling pump 9 through a flexible pipeline, the sampling pump 9 is connected with an oxygen analyzer 12 through a flexible pipeline.

[0031] The oxygen analyzer 12 is provided with a second ball valve 14 on a pipeline away from the sampling pump 9.

[0032] A third-stage precision filter 10 is further arranged between the sampling pump 9 and the oxygen analyzer 12, a flow meter 11 is further arranged between the sampling pump 9 and the third-stage precision filter 10, the flow meter 11 is used to determine whether the electric damper valve 4 can be opened to start the on-line detection, the flow meter 11 is connected in parallel with the third-stage precision filter 10, and a third ball valve 15 is arranged on a pipeline away from the sampling pump 9.

[0033] Example 4

[0034] An on-line detection device for oxygen content in a plasma welding box furnace chamber, as shown in Figure 1As shown in the figure, it includes a furnace chamber 1. At one end of the top of the furnace chamber 1, an electric baffle valve 4 is fixedly connected. The electric baffle valve 4 is operated and controlled on the host computer interface. The other end of the electric baffle valve 4 is connected to a first pipeline 5. On the side of the first pipeline 5 far from the electric baffle valve 4, a primary vacuum filter 6 is connected. The primary vacuum filter 6 filters the metal dust in the gas from the furnace chamber 1. On the other side of the primary vacuum filter 6, a second pipeline 13 is connected. A first ball valve 7 is arranged on the second pipeline 13. The first ball valve 7 is connected to a secondary precision filter 8 through the second pipeline 13. The secondary precision filter 8 is connected to a sampling pump 9 through a flexible pipeline. The sampling pump 9 is connected to an oxygen analyzer 12 through a flexible pipeline.

[0035] A second ball valve 14 is arranged on the pipeline on the side of the oxygen analyzer 12 far from the sampling pump 9.

[0036] A tertiary precision filter 10 is also arranged between the sampling pump 9 and the oxygen analyzer 12. A flowmeter 11 is also arranged between the sampling pump 9 and the tertiary precision filter 10. The flowmeter 11 is used to judge whether the electric baffle valve 4 can be opened to start online detection. The flowmeter 11 is connected in parallel with the tertiary precision filter 10. A third ball valve 15 is arranged on the pipeline on the side of the flowmeter 11 far from the sampling pump 9. The filter element of the primary vacuum filter 6 uses a paper filter element with a filtration accuracy of 5μm; the filter elements of the secondary precision filter 8 and the tertiary precision filter 10 use polymer PE filter elements with a filtration accuracy of 5μm. The function of the secondary precision filter 8 is to provide relatively pure gas for the sampling pump 9, and the function of the tertiary precision filter 10 is to provide pure and impurity-free gas for the oxygen analyzer 12 to ensure the reliability of continuous detection of the oxygen analyzer 12.

[0037] Example 5

[0038] For the on-line detection device of the oxygen content in the plasma welding box furnace chamber, as Figure 1 shown, it includes a furnace chamber 1. At one end of the top of the furnace chamber 1, an electric baffle valve 4 is fixedly connected. The electric baffle valve 4 is operated and controlled on the host computer interface. The other end of the electric baffle valve 4 is connected to a first pipeline 5. On the side of the first pipeline 5 far from the electric baffle valve 4, a primary vacuum filter 6 is connected. The primary vacuum filter 6 filters the metal dust in the gas from the furnace chamber 1. On the other side of the primary vacuum filter 6, a second pipeline 13 is connected. A first ball valve 7 is arranged on the second pipeline 13. The first ball valve 7 is connected to a secondary precision filter 8 through the second pipeline 13. The secondary precision filter 8 is connected to a sampling pump 9 through a flexible pipeline. The sampling pump 9 is connected to an oxygen analyzer 12 through a flexible pipeline.

[0039] A second ball valve 14 is arranged on the pipeline on the side of the oxygen analyzer 12 far from the sampling pump 9.

[0040] A third precision filter 10 is further arranged between the sampling pump 9 and the oxygen analyzer 12, and a flow meter 11 is further arranged between the sampling pump 9 and the third precision filter 10, the flow meter 11 is used to determine whether the electric baffle valve 4 can be opened to start the online detection, the flow meter 11 is connected in parallel with the third precision filter 10, and the third ball valve 15 is arranged on the pipeline away from the sampling pump 9 side of the flow meter 11, the filter element of the first vacuum filter 6 adopts a paper filter element with a filtering precision of 5 microns; the filter elements of the second precision filter 8 and the third precision filter 10 adopt high-molecular PE filter elements with a filtering precision of 5 microns, wherein the second precision filter 8 provides relatively pure gas for the sampling pump 9, and the third precision filter 10 provides pure and impurity-free gas for the oxygen analyzer 12, thereby ensuring the reliability of continuous detection of the oxygen analyzer 12.

[0041] The welding torch 3 is fixedly connected to the inner wall of the furnace chamber 1, and the electrode 2 is clamped in the furnace chamber 1 by a special electrode clamp.

[0042] Example 6

[0043] The online oxygen content detection device for the plasma welding box furnace chamber in Example 5 is used to perform online oxygen content detection, and the detection method is as follows:

[0044] Step 1: Before starting the welding of the electrode 2 by using the welding torch 3, the furnace chamber 1 needs to be first subjected to vacuum leak detection to check whether the leakage rate of the furnace chamber 1 is within the process requirement range; if the process requirement is met, the inert gas, specifically argon, is filled into the furnace chamber 1, and when the argon filling pressure of the furnace chamber 1 reaches 82 KPa, step 2 is entered;

[0045] Step 2: The oxygen analyzer 12 is started to prepare for the online oxygen content detection;

[0046] Step 3: The sampling pump 9 is started to perform the emptying treatment of the air in the furnace chamber 1, the first pipeline 5 and the second pipeline 13, and the air in the detection system needs to be emptied before the detection of the oxygen content in the furnace chamber 1 to avoid the distortion of the oxygen content detection data;

[0047] Step 4: The scale value of the flow meter 11 is obtained by observing the position of the floating ball in the flow meter 11 to confirm whether the detection system is in a vacuum state, and if the detection system is in a vacuum state, step 5 is entered;

[0048] Step 5: The electric baffle valve 4 is opened on the upper machine interface to start the online detection of the oxygen content in the furnace chamber 1, and the value of the oxygen content on the upper machine interface is observed, and if the oxygen content in the furnace chamber 1 is within the process requirement range, the welding is started, and if the oxygen content in the furnace chamber 1 exceeds the standard during the welding process, the welding operation needs to be immediately stopped.

Claims

1. An on-line detecting device for oxygen content in a plasma furnace chamber, characterized in that, Including stove chamber (1), stove chamber (1) top one end fixedly connected with electric damper valve (4), electric damper valve (4) other end is connected with first pipe (5), first pipe (5) is connected with primary vacuum filter (6) on the side away from electric damper valve (4), primary vacuum filter (6) other side is connected with second pipe (13), first ball valve (7) is arranged on second pipe (13), second pipe (13) is connected with secondary precision filter (8) through first ball valve (7), sampling pump (9) is connected through flexible pipe with secondary precision filter (8), sampling pump (9) is connected through flexible pipe with oxygen analyzer (12).

2. The device for on-line detection of oxygen content in a plasma torch chamber according to claim 1, characterized in that, Second ball valve (14) is arranged on the pipeline on the side away from sampling pump (9) of oxygen analyzer (12).

3. The device for on-line detection of oxygen content in a plasma torch chamber according to claim 1, characterized in that, Third precision filter (10) is further arranged between sampling pump (9) and oxygen analyzer (12).

4. The device for on-line detection of oxygen content in a plasma torch chamber according to claim 3, characterized in that, Flow meter (11) is further arranged between sampling pump (9) and third precision filter (10), and flow meter (11) is connected with third precision filter (10) in parallel.

5. The device for on-line detection of oxygen content in a plasma torch chamber according to claim 4, characterized in that, Third ball valve (15) is arranged on the pipeline on the side away from sampling pump (9) of flow meter (11).

6. The device for on-line detection of oxygen content in a plasma torch chamber according to claim 5, characterized in that, The filter element of primary vacuum filter (6) adopts paper filter element, and the filter element of secondary precision filter (8) and third precision filter (10) adopts high molecular PE filter element.

7. The apparatus for on-line detection of oxygen content in a plasma torch chamber according to claim 1, wherein, Welding torch (3) is fixedly connected on the inner wall of stove chamber (1).

8. The apparatus for on-line detection of oxygen content in a plasma torch chamber according to claim 1, wherein, Electrode (2) is clamped in stove chamber (1) by electrode special fixture.

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