Kiln atmosphere sampling device and kiln atmosphere detection system

Abstract

The invention discloses a kiln atmosphere sampling device and a kiln atmosphere detection system.The kiln atmosphere sampling device comprises a supporting pipe and a gas guide hose, the supporting pipe is suitable for being arranged in a sampling hole of a kiln in a penetrating mode, the gas guide hose is connected with the supporting pipe, and the gas guide hose is suitable for being arranged in the kiln when the supporting pipe is arranged in the sampling hole of the kiln in a penetrating mode; the air guide hose is arranged in the supporting pipe and extends downwards and towards the sagger from the supporting pipe, the air guide hose is provided with an air suction port for allowing air in the kiln to enter, and the supporting pipe is provided with an air outlet for allowing the air to be exhausted. The supporting pipe and the gas guide hose are matched to be conveniently inserted into the kiln and taken out of the kiln, the supporting pipe is supported in the sampling hole after being inserted into the kiln, the gas guide hose extends downwards from the supporting pipe, the downward extension of the gas guide hose enables the gas suction port to be close to the sagger, gas close to the sagger can be sucked in the sampling process, and the sampling efficiency is improved. The part of gas can better reflect the atmosphere environment where the materials in the sagger are located, and a foundation is laid for more accurately controlling the reaction process of the materials.

Description

Technical Field

[0001] The present application relates to the technical field of kiln gas analysis, and in particular to a kiln atmosphere sampling device and a kiln atmosphere detection system. Background Art

[0002] At present, the atmosphere detection port of the roller kiln is set on the side wall of the furnace, and the tool is inserted into the detection port to take samples near the side wall of the furnace. That is to say, the final test is the gas atmosphere near the side wall of the kiln. Since the bottom and side of the kiln are often provided with air inlets, and the top of the kiln is often provided with air outlets, when the kiln is running, a large amount of gas flows in and out, and the atmosphere on the side of the furnace wall fluctuates greatly. Therefore, there are generally problems such as unreliable test results, large differences from the actual situation of the material, and large and inaccurate test fluctuations. It is impossible to truly reflect the atmosphere of the material in the sagger. For this reason, it is necessary to propose a new sampling tool. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present application proposes a kiln atmosphere sampling device.

[0004] To achieve the above-mentioned purpose, the present application discloses a kiln atmosphere sampling device, the kiln atmosphere sampling device comprising:

[0005] A support tube adapted to be passed through a sampling hole in the kiln; and

[0006] An air guide hose is connected to the support tube, and is suitable for being placed inside the kiln when the support tube is inserted into the sampling hole of the kiln, and extends downward from the support tube and toward the sagger, and the air guide hose is provided with an air intake port for allowing the gas inside the kiln to enter, and the support tube is provided with an air outlet for allowing the gas to be discharged.

[0007] In some embodiments of the present application, the air guide hose is suitable for being retracted into the support tube.

[0008] In some embodiments of the present application, the air guiding hose is suitable for being retracted into the support tube when the support tube is evacuated.

[0009] In some embodiments of the present application, the air guide hose is suitable for extending downward from the support tube under the action of gravity.

[0010] In some embodiments of the present application, the air guiding hose is suitable for extending downward from the support tube when air is supplied to the support tube.

[0011] In some embodiments of the present application, the air duct is provided with an air suction head, and the air suction head is provided with the air suction port.

[0012] In some embodiments of the present application, the sum of the flow cross-sectional areas of the air inlet is smaller than the sum of the flow cross-sectional areas of the air guiding hose.

[0013] In some embodiments of the present application, the kiln atmosphere sampling device further comprises a fixing bolt, which is sleeved on the support tube, and the fixing bolt is suitable for connecting with the wall of the kiln when the support tube is passed through the sampling hole of the kiln.

[0014] In some embodiments of the present application, the fixing bolt is slidably disposed relative to the supporting tube.

[0015] In some embodiments of the present application, the furnace atmosphere sampling device further includes a fastener, and the fastener is suitable for locking and unlocking the relative position between the fixing bolt and the supporting tube.

[0016] In some embodiments of the present application, the support tube is provided with a plurality of positioning grooves arranged alternately along the length direction of the support tube, and the fastener comprises a screw, and the screw is connected to the fixing bolt and is suitable for being inserted into and leaving the positioning groove.

[0017] In some embodiments of the present application, the number of the positioning grooves is not less than the number of saggers in a transverse arrangement.

[0018] In some embodiments of the present application, the distance between two adjacent positioning grooves is adapted to the distance between adjacent saggers arranged laterally.

[0019] In some embodiments of the present application, the fixing bolt is suitable for being magnetically connected to the wall of the kiln.

[0020] In some embodiments of the present application, a sealing ring is adapted to be provided between the fixing bolt and the wall of the kiln for sealing.

[0021] In some embodiments of the present application, the kiln atmosphere sampling device also includes a handle, which is connected to the support tube and is suitable for being located outside the kiln when the support tube is inserted into the sampling hole of the kiln, and the handle is provided with a positioning portion, and the positioning portion is used to indicate the extension direction of the air duct.

[0022] In some embodiments of the present application, the positioning portion is protruded from the handle, and the protruding direction of the positioning portion is in the same direction as the extending direction of the air guide hose.

[0023] In some embodiments of the present application, the support tube includes an inner tube and an outer tube sleeved on the inner tube, the air guide hose is connected to the inner tube, a cavity is formed between the outer tube and the inner tube, the outer tube is provided with an inlet and an outlet connected to the cavity, the inlet is suitable for introducing a coolant, and the outlet is suitable for discharging the coolant.

[0024] In some embodiments of the present application, the inner tube includes a first tube segment and a second tube segment, the air guide hose is connected to the first tube segment, the second tube segment is away from the air guide hose relative to the first tube segment, and the diameter of the second tube segment is smaller than the diameter of the first tube segment.

[0025] In some embodiments of the present application, the furnace atmosphere sampling device further includes a power source, and the power source is suitable for being connected to the support tube so as to be suitable for exhausting and supplying air to the support tube.

[0026] In some embodiments of the present application, the gas hose is made of high temperature resistant glass fiber.

[0027] The second aspect of the present application discloses a kiln atmosphere detection system, comprising a gas analyzer and the above-mentioned kiln atmosphere sampling device, wherein the gas analyzer is suitable for detecting the gas discharged from the gas outlet.

[0028] The cooperation of the support tube and the gas guide hose in the technical solution of the present application facilitates insertion into and removal from the kiln. After being inserted into the kiln, the support tube is supported on the sampling hole, and the gas guide hose extends downward from the support tube. The downward extension of the gas guide hose allows the air suction port to be close to the sagger, and the gas close to the sagger can be sucked during the sampling process. This part of the gas better reflects the atmosphere of the material in the sagger, laying a foundation for more accurate control of the reaction process of the material.

[0029] Other advantages of the present application will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other designs can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 Schematic diagram of the coordination between the kiln atmosphere sampling device and the kiln in some embodiments (the air guide hose is in an extended state);

[0032] Figure 2 A schematic diagram of a furnace atmosphere sampling device in some embodiments (the gas guide hose is in an extended state);

[0033] Figure 3 It is an enlarged view of the local structure of the gas guide hose in some embodiments;

[0034] Figure 4A cross-sectional view of a furnace atmosphere sampling device in some embodiments (the gas guide hose is in an extended state);

[0035] Figure 5 It is a schematic diagram of an inverted furnace atmosphere sampling device in some embodiments (the gas guide hose is in a retracted state);

[0036] Figure 6 It is a side view of the fixing bolt in some embodiments (observed along the axial direction of the fixing bolt).

[0037] Description of Figure Numbers:

[0038] Kiln atmosphere sampling device 1000, support tube 1100, inner tube 1110, first tube section 1111, second tube section 1112, outer tube 1120, inlet 1121, outlet 1122, installation port 1130, air outlet 1140, positioning groove 1150, clamping cavity 1160, air guide hose 1200, air suction head 1210, air suction port 1211, fixing bolt 1300, fastener 1310, sealing ring 1320, magnet 1330, handle 1400, positioning part 1410, kiln 2100, sampling hole 2110, sagger 2200.

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0044] The preparation methods of positive electrode materials for lithium-ion batteries generally include solid-phase sintering, complex method, sol-gel method, ion exchange method, etc. Among them, the solid-phase sintering method has been widely studied and applied because of its simple process flow and easy availability of raw materials. The solid-phase sintering method generally includes mixing, sintering, crushing and other processes. During the sintering process, due to the uneven distribution of the structure in the kiln, the heating state of the sagger after entering the kiln is different, and there are differences in the contact effect between oxygen and the material in the sagger. At present, the control of the material production process is achieved by detecting the reaction atmosphere. Taking the roller kiln as an example, the atmosphere detection port (sampling port) is set on the side wall of the furnace, and the tool is inserted into the detection port to take samples near the side wall of the furnace. That is to say, the final test is the gas atmosphere near the side wall of the kiln. Since air inlets are often set at the bottom and sides of the kiln, and air outlets are often set at the top of the kiln, when the kiln is running, a large amount of gas flows in and out, and the atmosphere on the side of the furnace wall fluctuates greatly. Therefore, there are generally problems such as unreliable test results, large differences from the actual situation of the material, and large and inaccurate test fluctuations. It is impossible to truly reflect the atmosphere of the material in the sagger. For this reason, it is necessary to propose a new sampling tool.

[0045] The first aspect of the present application provides a furnace atmosphere sampling device 1000, which is combined with Figures 1 to 3 As shown, in some embodiments, the kiln atmosphere sampling device 1000 includes a support tube 1100 and an air guide hose 1200, the support tube 1100 is used to pass through the sampling hole 2110 of the kiln 2100, the air guide hose 1200 is connected to the support tube 1100, the air guide hose 1200 is suitable for being placed inside the kiln 2100 when the support tube 1100 passes through the sampling hole 2110 of the kiln 2100, and extending downward from the support tube 1100 and toward the sagger 2200, the air guide hose 1200 is provided with an air intake port 1211 for the gas inside the kiln 2100 to enter, and the support tube 1100 is provided with an air outlet 1140 for the gas to be discharged.

[0046] The support tube 1100 and the gas hose 1200 cooperate to facilitate insertion into and removal from the kiln 2100. After being inserted into the kiln 2100, the support tube 1100 is supported on the sampling hole 2110, and the gas hose 1200 extends downward from the support tube 1100. The downward extension of the gas hose 1200 allows the air intake port 1211 to be close to the sagger 2200. During the sampling process, the gas close to the sagger 2200 can be sucked. This part of the gas better reflects the atmosphere of the material in the sagger 2200, laying a foundation for more accurate control of the reaction process of the material.

[0047] Specifically, the kiln atmosphere sampling device 1000 in the present application is not limited to the preparation of positive electrode materials for lithium-ion batteries, but can also be used for the preparation of other types of materials. The kiln 2100 can be a roller kiln, a tunnel kiln, or other types of kilns. The kiln 2100 is provided with a sampling hole 2110. It can be understood that the sampling hole 2110 of the kiln 2100 can be a hole specially provided for sampling, or the hole can also take into account other functions in addition to sampling. For example, the kiln 2100 is equipped with a heating rod. When sampling is required, the corresponding heating rod can be removed, and the hole exposed after the heating rod is removed can serve as the sampling hole 2110. This hole can be installed with a heating rod to achieve heating in the furnace, and the kiln atmosphere sampling device 1000 can also be installed to sample the furnace. In other words, as long as the furnace atmosphere sampling device 1000 can be inserted into the hole for sampling, it can be regarded as a sampling hole 2110, regardless of whether the hole is specifically used for sampling.

[0048] The support tube 1100 plays a supporting role. When sampling is required, the support tube 1100 passes through the sampling hole 2110 and is inserted into the interior of the kiln 2100. The support tube 1100 needs to be inserted into the sampling hole 2110 so as to be supported on the kiln 2100. Generally speaking, the sampling hole 2110 is set on the side wall of the kiln 2100, or in other words, the opening direction of the sampling hole 2110 is horizontally open. When the support tube 1100 is inserted into the sampling hole 2110, the support tube 1100 is in a horizontal state. Since the support tube 1100 needs to play a supporting role, the support tube 1100 needs to have a certain structural strength / hardness. At the same time, since the temperature of the kiln 2100 is relatively high, the material of the support tube 1100 also needs to be resistant to high temperatures.

[0049] The air hose 1200 is connected to the support tube 1100. It can be understood that the connection between the air hose 1200 and the support tube 1100 is realized. When the support tube 1100 is inserted into the sampling hole 2110 of the kiln 2100, the air hose 1200 is inside the kiln 2100. At this time, the air hose 1200 extends downward from the support tube 1100 and toward the sagger 2200, so that the air inlet 1211 of the air hose 1200 can be close to the sagger 2200. For example Figure 1 As shown, when the support tube 1100 is inserted into the sampling hole 2110, the support tube 1100 is in a horizontal state, and the gas hose 1200 extends downward from the support tube 1100 until it extends to a position close to the upper surface of the sagger 2200. By such an arrangement, when the gas is sucked, the gas close to the sagger 2200 enters the gas hose 1200 through the air inlet 1211 and flows through the support tube 1100, and finally outputs from the gas outlet 1140. The gas output from the gas outlet 1140 can be transported to the gas analyzer for analysis. How to perform gas extraction and how to perform gas analysis can be seen in the relevant technology, which is not the focus of this application, but will not be repeated. Since the gas close to the sagger 2200 is sucked, this part of the gas better reflects the atmosphere of the material in the sagger 2200, laying the foundation for more accurate control of the reaction process of the material.

[0050] For example, the kiln 2100 of the roller kiln has a total of 30 temperature zones, of which the first 25 temperature zones have heating functions and the last 5 temperature zones are used for cooling. Each temperature zone in the heating temperature zone has 10 groups of heating rods, of which 5 groups of heating rods are located above the sagger 2200, and the other 5 groups of heating rods are located below the sagger 2200. Because the precursor used in the sintering of the positive electrode material of the lithium-ion battery contains hydroxide, and the lithium carbonate used contains carbonate, water vapor and carbon dioxide will be produced during the reaction, and it is necessary to infer the reaction progress of the material by detecting the atmosphere on the surface of the material. If it is necessary to test the reaction of the material in the 10th temperature zone, the heating rod located above the sagger 2200 in the temperature zone can be temporarily removed, and the kiln atmosphere sampling device 1000 can be inserted into the hole position (sampling hole 2110) of the heating rod for sampling, and the atmosphere of the sampled gas (carbon dioxide and water content) is analyzed.

[0051] It is understandable that the air guide hose 1200 can be deformed and reset. When the support tube 1100 passes through the sampling hole 2110, the air guide hose 1200 can be deformed to facilitate passing through the sampling hole 2110 and reaching the inside of the kiln 2100. After the air guide hose 1200 reaches the inside of the kiln 2100, it can be reset to extend downward from the support tube 1100 and toward the sagger 2200. Similarly, when the kiln atmosphere sampling device 1000 is removed, the air guide hose 1200 can be deformed and pass through the sampling hole 2110. The air hose 1200 needs to be resistant to high temperatures. For example, in the present embodiment, the material of the air hose 1200 is high temperature resistant glass fiber, wherein glass fiber is an inorganic non-metallic material with excellent performance. It is made of six kinds of minerals, namely talc, quartz sand, limestone, dolomite, calcite and borax, and is manufactured through high temperature melting, wire drawing, winding, weaving and other processes. High temperature resistant glass fiber is a material with the characteristics of high temperature resistance, insulation, fire retardancy, corrosion resistance, aging resistance, weather resistance, high strength, high modulus, anti-static, smooth appearance and the like. Although the air hose 1200 prepared by high temperature resistant glass fiber in the present embodiment is a hose, its shape is close to that of cloth, it can be deformed freely, and it has a light weight, stable size and small rebound. High-temperature resistant glass fiber has been seen in related technologies. Appropriate high-temperature resistant glass fiber can be selected to prepare the air hose 1200 according to the temperature of the kiln 2100. In other words, the high-temperature resistance is just to withstand the temperature of the kiln 2100. The air hose 1200 that can be used in this application is selected from the high-temperature resistant glass fiber produced by Langfang Kean Sealing Materials Co., Ltd. with the trademark brand of Ji Zheng. The material is high-silica cloth, the high-temperature resistance is 1200°C, and the model is 920mm.

[0052] In order to facilitate the insertion of the furnace atmosphere sampling device 1000 into the furnace 2100, in some embodiments, Figure 4 and Figure 5 As shown, the gas hose 1200 is designed to be retractable in the support tube 1100. The so-called retraction means that the gas hose 1200 is hidden in the support tube 1100. In this way, before inserting the kiln atmosphere sampling device 1000 into the kiln 2100, the gas hose 1200 can be retracted into the support tube 1100, and the support tube 1100 is controlled to pass through the sampling hole 2110 and inserted into the kiln 2100. In the process of the support tube 1100 passing through the sampling hole 2110, since the gas hose 1200 has been retracted into the support tube 1100, it will not cause obstacles when the support tube 1100 passes through the sampling hole 2110, thereby facilitating the insertion of the kiln atmosphere sampling device 1000 into the kiln 2100. Similarly, by designing the gas hose 1200 to be retractable in the support tube 1100, it is also convenient to pull the kiln atmosphere sampling device 1000 out of the kiln 2100.

[0053] For example, Figure 5As shown, the support tube 1100 is provided with a mounting port 1130, and the gas hose 1200 is connected to the support tube 1100 and can be extended from the mounting port 1130. When the gas hose 1200 is retracted into the support tube 1100, the gas hose 1200 is hidden in the mounting port 1130, so that when the support tube 1100 passes through the sampling hole 2110, there will be no obstruction of the gas hose 1200, which makes it more convenient to disassemble and assemble the kiln atmosphere sampling device 1000.

[0054] The retraction of the gas hose 1200 to the support tube 1100 can be achieved in a variety of ways. For example, before inserting the kiln atmosphere sampling device 1000 into the kiln 2100, the gas hose 1200 can be manually retracted to the support tube 1100. Of course, the gas hose 1200 can also be retracted to the support tube 1100 by exhausting air from the support tube 1100. It is understandable that the extraction of gas by sampling requires the cooperation of a power source, that is, the support tube 1100 needs to be connected to a power source, which is used for exhausting and delivering gas. The gas can be extracted during sampling by the power source, so the gas hose 1200 can be retracted to the support tube 1100 by the exhaustion of the power source. When the power source is pumping (air is pumped into the support tube 1100), a negative pressure is formed inside the gas hose 1200. Different suction forces are set according to different situations. A small suction force can achieve continuous suction of the gas (thus sampling), while a large suction force can flatten the gas hose 1200. Since the end of the gas hose 1200 is connected to the outside world, as the power source is pumped, there is a pressure difference between the end of the gas hose 1200 and the outside world. Under the action of the pressure difference, the gas hose 1200 is pressed toward the support tube 1100, thereby retracting into the support tube 1100. This can improve the efficiency of the gas hose 1200 retracting into the support tube 1100.

[0055] Since the air guide hose 1200 can be retracted into the support tube 1100, and since the air guide hose 1200 can extend downward from the support tube 1100 and toward the sagger 2200, that is to say, the air guide hose 1200 can be switched from a state of being retracted into the support tube 1100 to a state of being extended from the support tube 1100, and can also be switched from a state of being extended from the support tube 1100 to a state of being retracted into the support tube 1100. It can be seen from the above that before the support tube 1100 passes through the sampling hole 2110 to be inserted into the interior of the kiln 2100, the gas hose 1200 retracts into the support tube 1100. In the process of the support tube 1100 passing through the sampling hole 2110 to be inserted into the interior of the kiln 2100, the gas hose 1200 needs to follow the insertion of the support tube 1100 and reach the interior of the kiln 2100. After reaching the interior of the kiln 2100, in order to be able to switch the gas hose 1200 to a state extended from the support tube 1100, the present embodiment designs the gas hose 1200 to switch from a state retracted in the support tube 1100 to a state extended from the support tube 1100 under the action of gravity. For example, when the support tube 1100 passes through the sampling hole 2110 to be inserted into the interior of the kiln 2100, the installation port 1130 of the support tube 1100 faces upward, and the gas hose 1200 retracts into the support tube 1100 and hides in the installation port 1130. After the support tube 1100 is inserted into the kiln 2100, the support tube 1100 is rotated so that the installation port 1130 faces downward, and the gas hose 1200 extends downward under the action of gravity, thereby switching from the state of being retracted into the support tube 1100 to the state of being extended from the support tube 1100.

[0056] In addition to using gravity to switch the air hose 1200 from the state of being retracted in the support tube 1100 to the state of being extended from the support tube 1100, the air hose 1200 can also be switched from the state of being retracted in the support tube 1100 to the state of being extended from the support tube 1100 by supplying air to the support tube 1100. For example, the power source can also supply air to the support tube 1100. In the process of the support tube 1100 passing through the sampling hole 2110 to be inserted into the interior of the kiln 2100, the mounting opening 1130 of the support tube 1100 faces upward, the air hose 1200 is retracted in the support tube 1100 and hidden in the mounting opening 1130. After the support tube 1100 is inserted into the kiln 2100, the support tube 1100 is rotated so that the mounting opening 1130 faces downward, and the power source supplies air to the support tube 1100, so that the interior of the air hose 1200 is slightly positively pressurized, thereby quickly extending downward from the support tube 1100.

[0057] Combination Figure 2 and Figure 3As shown, in some embodiments, the air hose 1200 is provided with an air suction head 1210, and the air suction head 1210 is provided with an air suction port 1211, and the air suction head 1210 plays a role of counterweight and support for the air hose 1200. When sampling is required, the support tube 1100 is evacuated, and negative pressure appears inside the air hose 1200. Since the end of the air hose 1200 is connected to the air suction head 1210, the air suction head 1210 supports the wall of the air hose 1200 to prevent it from being flattened, thereby ensuring the transmission of airflow. In the process of the air hose 1200 switching from the state of being retracted in the support tube 1100 to the state of being extended from the support tube 1100, the weight of the air suction head 1210 itself can drive the air hose 1200 to extend rapidly.

[0058] Furthermore, in some embodiments, the sum of the flow cross-sectional areas of the air inlet 1211 is smaller than the sum of the flow cross-sectional areas of the air guiding hose 1200 . The end of the gas hose 1200 is connected to the air suction head 1210, and the air suction head 1210 is provided with an air suction port 1211. When sampling, the gas enters from the air suction port 1211 of the air suction head 1210, and flows through the gas hose 1200 and the support tube 1100 in sequence. Generally speaking, the air suction head 1210 is provided with a plurality of air suction ports 1211, and the plurality of air suction ports 1211 are densely arranged. In the present embodiment, the sum of the flow cross-sectional areas of the air suction ports 1211 is designed to be smaller than the sum of the flow cross-sectional areas of the gas hose 1200. In this way, when the gas hose 1200 is retracted into the support tube 1100 by suctioning the support tube 1100, it is easier to form a large pressure difference between the end of the gas hose 1200 and the outside world, and the gas suction head 1210 can quickly press the gas hose 1200 toward the support tube 1100, so that the gas hose 1200 is changed to a state of being retracted into the support tube 1100.

[0059] Combination Figure 1 and Figure 2 As shown, in some embodiments, the kiln atmosphere sampling device 1000 further includes a fixing bolt 1300, which is sleeved on the support tube 1100, and the fixing bolt 1300 is suitable for connecting with the wall of the kiln 2100 when the support tube 1100 is inserted into the sampling hole 2110 of the kiln 2100. It can be understood that after the kiln atmosphere sampling device 1000 is inserted into the kiln 2100, it needs to be fixed. For this purpose, in this embodiment, by providing a fixing bolt 1300, the fixing bolt 1300 is sleeved on the support tube 1100, and when the support tube 1100 is inserted into the sampling hole 2110, the fixing bolt 1300 is connected with the wall of the kiln 2100, so that the support tube 1100 is fixed, and the support tube 1100 is not easy to change its position, that is, the support positioning of the gas guide hose 1200 is achieved at this time.

[0060] Generally speaking, a plurality of saggers 2200 are arranged along a direction perpendicular to the transmission direction of the sagger 2200, and a plurality means two or more, such as 2, 3 or 4. Therefore, it is necessary to adjust the insertion degree of the support tube 1100 so as to obtain atmosphere samples of saggers 2200 in different columns in the same temperature zone. For this reason, in the present embodiment, the fixing bolt 1300 is designed to slide along the support tube 1100, so that the position of the fixing bolt 1300 on the support tube 1100 can be adjusted accordingly according to the different insertion depths of the support tube 1100, thereby ensuring the connection between the fixing bolt 1300 and the wall of the kiln 2100 when sampling saggers 2200 in different columns, thereby ensuring the fixation of the kiln atmosphere sampling device 1000.

[0061] Combination Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the furnace atmosphere sampling device 1000 further includes a fastener 1310 , and the fastener 1310 is suitable for locking the relative position between the fixing bolt 1300 and the supporting tube 1100 . The fixing bolt 1300 can slide on the support tube 1100. When the fixing bolt 1300 slides to the corresponding position, it is no longer desired that the position of the fixing bolt 1300 change, so as to ensure that the gas guide hose 1200 corresponds to the sagger 2200. For this purpose, a fastener 1310 is provided in the present embodiment. The fastener 1310 is used to lock the relative position between the fixing bolt 1300 and the support tube 1100, and is also used to unlock the relative position between the fixing bolt 1300 and the support tube 1100. When the relative position between the fixing bolt 1300 and the support tube 1100 needs to be adjusted, the fastener 1310 is operated to unlock, and the fixing bolt 1300 can slide relative to the support tube 1100. When the fixing bolt 1300 slides to the corresponding position, it is locked by the fastener 1310. At this time, the relative position of the fixing bolt 1300 and the support tube 1100 no longer changes.

[0062] Optionally, continue combining Figure 1 , Figure 2 and Figure 4As shown, in some embodiments, the support tube 1100 is provided with a plurality of positioning grooves 1150 arranged alternately along the length direction of the support tube 1100, and the fastener 1310 includes a screw, which is connected to the fixing bolt 1300 and is suitable for being inserted into and removed from the positioning groove 1150. The number of the positioning grooves 1150 is multiple, and multiple means two or more. The screw is arranged on the fixing bolt 1300 and connected to the fixing bolt 1300. When the relative position between the fixing bolt 1300 and the support tube 1100 needs to be adjusted, the screw is operated (rotated) to leave the positioning groove 1150 to unlock, and at this time, the fixing bolt 1300 can slide along the support tube 1100 to the corresponding positioning groove 1150, and then the screw is operated (rotated) to be inserted into the positioning groove 1150 to be locked. It can be understood that the spacing between two adjacent positioning grooves 1150 is adapted to the spacing between adjacent saggers 2200 arranged in the transverse direction, and the adaptation here means that when the fixing bolt 1300 is adjusted to correspond to any positioning groove 1150, the gas guide hose 1200 will also correspond to the corresponding sagger 2200. Further, the number of positioning grooves 1150 is not less than the number of saggers 2200 arranged in the transverse direction, and the number of positioning grooves 1150 and the number of saggers 2200 may be the same, or the number of positioning grooves 1150 is more than the number of saggers 2200, so as to ensure that the same kiln atmosphere sampling device 1000 can sample any sagger 2200 arranged in the transverse direction.

[0063] There are many ways to connect the fixing bolt 1300 and the wall of the kiln 2100, such as screw connection, snap connection, etc. In this embodiment, the fixing bolt 1300 and the wall of the kiln 2100 are connected by magnetic attraction, which is conducive to improving the efficiency of disassembly and assembly. Figure 6 As shown, the fixing bolt 1300 is provided with a magnet 1330 , and the magnet 1330 is adsorbed on the wall of the kiln 2100 , so that the connection between the fixing bolt 1300 and the wall of the kiln 2100 is achieved.

[0064] In order to facilitate the support tube 1100 to pass through the sampling hole 2110 and be inserted into the interior of the kiln 2100, the sampling hole 2110 is designed to be larger than the diameter of the support tube 1100. Therefore, it is necessary to prevent gas from leaking out from the gap between the sampling hole 2110 and the support tube 1100. In this embodiment, on the basis of the connection between the fixing bolt 1300 and the wall of the kiln 2100, a sealing ring 1320 is further provided between the fixing bolt 1300 and the wall of the kiln 2100, and the sealing ring 1320 plays a sealing role. Figure 6 As shown, the sealing ring 1320 is disposed on the fixing bolt 1300. After the fixing bolt 1300 and the wall of the kiln 2100 are magnetically attracted, the fixing bolt 1300 and the wall of the kiln 2100 jointly press the sealing ring 1320 to achieve a sealing effect.

[0065] Combination Figure 1 and Figure 2As shown, in some embodiments, the kiln atmosphere sampling device 1000 also includes a handle 1400, which is connected to the support tube 1100 and is suitable for being located outside the kiln 2100 when the support tube 1100 is inserted into the sampling hole 2110 of the kiln 2100, and the handle 1400 is provided with a positioning portion 1410, which is used to indicate the extension direction of the gas guide hose 1200.

[0066] Specifically, the handle 1400 is sleeved on the support tube 1100. When the support tube 1100 is controlled to pass through the sampling hole 2110 to be inserted into the kiln 2100, the handle 1400 can be held to operate. The handle 1400 can be located at multiple positions of the support tube 1100, for example, the handle 1400 is located at the end of the support tube 1100. It can be understood that when the support tube 1100 passes through the sampling hole 2110 to be inserted into the kiln 2100, the gas guide hose 1200 is located inside the kiln 2100, and the operator cannot see the direction of the gas guide hose 1200. In particular, before the support tube 1100 passes through the sampling hole 2110 to be inserted into the kiln 2100, the installation port 1130 of the support tube 1100 faces upward, and after being inserted into the kiln 2100, the support tube 1100 is rotated so that its installation port 1130 faces downward, and the operator is uncertain whether the installation port 1130 faces downward. To this end, in this embodiment, a positioning portion 1410 is provided on the handle 1400 . The positioning portion 1410 is used to indicate the extension direction of the gas hose 1200 . The operator only needs to determine the positioning portion 1410 to determine the extension direction of the gas hose 1200 .

[0067] For example, the positioning portion 1410 protrudes from the handle 1400, and the protruding direction of the positioning portion 1410 is in the same direction as the extending direction of the gas hose 1200. Before the support tube 1100 passes through the sampling hole 2110 to be inserted into the kiln 2100, the mounting port 1130 of the support tube 1100 faces upward, and the protruding direction of the positioning portion 1410 also faces upward. After being inserted into the kiln 2100, the support tube 1100 is rotated so that its mounting port 1130 faces downward. The operator only needs to control the positioning portion 1410 to protrude downward to ensure that the gas hose 1200 extends downward from the support tube 1100.

[0068] Combination Figure 4As shown, in some embodiments, the support tube 1100 includes an inner tube 1110 and an outer tube 1120 sleeved with the inner tube 1110, the gas guide hose 1200 is connected to the inner tube 1110, and a sandwich cavity 1160 is formed between the outer tube 1120 and the inner tube 1110. The outer tube 1120 is provided with an inlet 1121 and an outlet 1122 connected to the sandwich cavity 1160, the inlet 1121 is suitable for passing a coolant, and the outlet 1122 is suitable for discharging the coolant. The outer tube 1120 is sleeved with the inner tube 1110, so that a sandwich cavity 1160 is formed between the outer tube 1120 and the inner tube 1110. When sampling, the coolant can enter the sandwich cavity 1160 between the outer tube 1120 and the inner tube 1110 from the inlet 1121, and then be discharged from the outlet 1122. When the gas flows through the inner tube 1110, the heat can be transferred to the coolant and taken away by the coolant, thereby preventing the gas from damaging the gas analyzer. There are many types of coolants, and the main thing is to take away the heat of the sampled gas, for example, the coolant is water.

[0069] Optionally, combined Figure 4 As shown, the inner tube 1110 includes a first tube section 1111 and a second tube section 1112, the air hose 1200 is connected to the first tube section 1111, the second tube section 1112 is farther away from the air hose 1200 than the first tube section 1111, and the diameter of the second tube section 1112 is smaller than the diameter of the first tube section 1111. The second tube section 1112 in the figure is provided with an air outlet 1140, and when sampling, the airflow flows through the second tube section 1112, which can more fully exchange heat with the coolant, thereby more fully cooling the gas.

[0070] The following is a further description of the kiln atmosphere detection method, which includes the following steps:

[0071] Control the air hose 1200 to retract into the support tube 1100. The air hose 1200 can be retracted into the support tube 1100 manually or by evacuating the support tube 1100. First, the mounting opening 1130 of the support tube 1100 can be directed upward (or the positioning portion 1410 can be observed, in which case the convex direction of the positioning portion 1410 is directed upward), and then the air hose 1200 can be retracted into the support tube 1100.

[0072] The support tube 1100 is controlled to be inserted into the kiln 2100 from the sampling hole 2110. When the support tube 1100 is inserted into the kiln 2100, the support tube 1100 is in a state of being inserted into the sampling hole 2110, so that the gas guide hose 1200 is placed inside the kiln 2100.

[0073] The air guide hose 1200 is controlled to extend downward from the support tube 1100 and toward the sagger 2200. After the support tube 1100 is inserted into the kiln 2100, the support tube 1100 can be rotated so that the air guide hose 1200 extends from the support tube 1100 under the action of gravity or the action of air supply to the support tube 1100. At this time, the direction of the air guide hose 1200 can be positioned by observing the positioning portion 1410.

[0074] Adjust the relative position of the fixing bolt 1300 and the support tube 1100. Through the cooperation of the positioning groove 1150 and the screw, the fixing bolt 1300 is positioned at the corresponding position, and then the fixing bolt 1300 is connected to the wall of the kiln 2100. At this time, the air guide hose 1200 is close to the sagger 2200.

[0075] The support tube 1100 is evacuated. The power source is adjusted to negative pressure to draw gas, sample the gas, and then send it to the gas analyzer for analysis.

[0076] The air guide hose 1200 is controlled to retract into the support tube 1100, and the support tube 1100 is pulled away from the kiln 2100. At this time, the power source can be adjusted to continue suction (the suction effect is greater than that during sampling), so that the air guide hose 1200 is retracted into the support tube 1100.

[0077] The present application also discloses a kiln atmosphere detection system, which includes a gas analyzer and the above-mentioned kiln atmosphere sampling device 1000. The gas sampled by the kiln atmosphere sampling device 1000 is sent to the gas analyzer for analysis, so as to obtain the atmosphere environment conditions. It can be understood that the atmosphere environment sampling device of the kiln atmosphere detection system of this embodiment adopts the technical solution of the above-mentioned embodiment, and therefore at least has the beneficial effects brought by the technical solution of the above-mentioned embodiment, which will not be repeated here.

[0078] The present application also discloses a kiln sampling method, comprising the following steps:

[0079] S1. Place the kiln atmosphere sampling device into the sampling hole 2110, and control the air intake port of the kiln atmosphere sampling device to be located above a sagger in a designated temperature zone; wherein the distance between the air intake port and the surface of the sagger is within 5 cm;

[0080] S2. Adjust the power source to negative pressure to achieve sample sampling.

[0081] Preferably, the negative pressure has a pressure range of -200 to -5 Pa.

[0082] Preferably, the sample in S2 is a positive electrode material, the distance between the air intake port and the surface of the sagger is within 2 cm, and the pressure range of the negative pressure is -10 to -5 Pa; when obtaining the positive electrode material, a lower negative pressure value is selected to avoid disturbing the material on the surface of the sagger as much as possible while ensuring that the sample is absorbed.

[0083] And / or, the sample in S2 is a kiln atmosphere, the distance between the air inlet and the surface of the sagger is 2 to 5 cm, and the pressure range of the negative pressure is -200 to -10 Pa. When the kiln atmosphere is adopted, there is a certain distance between the air inlet and the surface of the sagger, and the negative pressure value can be appropriately increased to obtain samples in a larger range.

[0084] Preferably, the sampling hole 2110 is selected from the installation hole above the kiln 2100 for installing the heating rod.

[0085] Preferably, n saggers are arranged in the designated temperature zone along the extension direction of the heating rod, and the sampling cycle executes steps S1 and S2 until the sampling of the sample above each sagger is completed. Sampling each sagger in the temperature zone and finally obtaining the average value can improve the accuracy of sampling analysis.

[0086] Preferably, in S1, before the kiln atmosphere sampling device is placed in the sampling hole 2110, the air guide hose 1200 is controlled to retract into the support tube 1100 by introducing negative pressure, and after being placed in the sampling hole 2110, the air guide hose 1200 is controlled to be located above a sagger with an air inlet in a specified temperature zone by introducing positive pressure, wherein the negative pressure in S1 has a value range of -5 to -10Kpa; the positive pressure has a value range of 1 to 5Kpa. The placement of the kiln sampling device is completed by switching between positive and negative pressures, which can further improve work efficiency. When limited to a specified pressure, it can ensure that the service life of the air guide hose 1200 is improved under the premise of meeting the working conditions. When the kiln atmosphere sampling device needs to be taken out of the sampling hole 2110, the air guide hose 1200 is controlled to retract into the support tube 1100 by introducing negative pressure, so that the kiln atmosphere sampling device can be taken out.

[0087] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made based on the concept of the present application and the contents of the present application description and drawings, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A kiln atmosphere sampling device (1000), characterized in that: include: A support tube (1100) adapted to penetrate a sampling hole (2110) of a kiln (2100); as well as A gas-conducting hose (1200) is connected to the support tube (1100). The gas-conducting hose (1200) is suitable for being placed inside the kiln (2100) when the support tube (1100) is inserted into the sampling hole (2110) of the kiln (2100), and extends downward from the support tube (1100) and toward the sagger (2200). The gas-conducting hose (1200) is provided with an air intake port (1211) for allowing gas inside the kiln (2100) to enter, and the support tube (1100) is provided with an air outlet (1140) for allowing the gas to be discharged.

2. The furnace atmosphere sampling device (1000) according to claim 1, characterized in that: The air guide hose (1200) is suitable for being retracted into the support tube (1100); Preferably, the air guide hose (1200) is suitable for being retracted into the support tube (1100) when the support tube (1100) is evacuated; Preferably, the air guide hose (1200) is suitable for extending downward from the support tube (1100) under the action of gravity; and / or, the air guide hose (1200) is suitable for extending downward from the support tube (1100) when the support tube (1100) is supplied with air.

3. The furnace atmosphere sampling device (1000) according to claim 1, wherein: The air guide hose (1200) is provided with an air suction head (1210), and the air suction head (1210) is provided with the air suction port (1211); Preferably, the sum of the flow cross-sectional areas of the air inlet (1211) is smaller than the sum of the flow cross-sectional areas of the air guide hose (1200).

4. The furnace atmosphere sampling device (1000) according to claim 1, characterized in that: The kiln atmosphere sampling device (1000) further comprises a fixing bolt (1300), wherein the fixing bolt (1300) is sleeved on the support tube (1100), and the fixing bolt (1300) is suitable for connecting with the wall of the kiln (2100) when the support tube (1100) is passed through the sampling hole (2110) of the kiln (2100); Preferably, the fixing bolt (1300) is slidably arranged relative to the supporting tube (1100).

5. The furnace atmosphere sampling device (1000) according to claim 4, characterized in that: The furnace atmosphere sampling device (1000) further comprises a fastener (1310), wherein the fastener (1310) is suitable for locking and unlocking the relative position between the fixing bolt (1300) and the supporting tube (1100).

6. The furnace atmosphere sampling device (1000) according to claim 5, characterized in that: The support tube (1100) is provided with a plurality of positioning grooves (1150) arranged alternately along the length direction of the support tube (1100), and the fastener (1310) comprises a screw, which is connected to the fixing bolt (1300) and is suitable for being inserted into and leaving the positioning groove (1150).

7. The furnace atmosphere sampling device (1000) according to claim 4, characterized in that: The fixing bolt (1300) is suitable for magnetically connecting with the wall of the kiln (2100); And / or, a sealing ring (1320) is suitably provided between the fixing bolt (1300) and the wall of the kiln (2100) for sealing.

8. The furnace atmosphere sampling device (1000) according to claim 1, characterized in that: The kiln atmosphere sampling device (1000) further comprises a handle (1400), the handle (1400) being connected to the support tube (1100) and being suitable for being located outside the kiln (2100) when the support tube (1100) is inserted into the sampling hole (2110) of the kiln (2100), the handle (1400) being provided with a positioning portion (1410), and the positioning portion (1410) being used to indicate the extension direction of the air guide hose (1200); Preferably, the positioning portion (1410) is protruded from the handle (1400), and the protruding direction of the positioning portion (1410) is in the same direction as the extending direction of the air guide hose (1200).

9. The furnace atmosphere sampling device (1000) according to claim 1, characterized in that: The support tube (1100) comprises an inner tube (1110) and an outer tube (1120) sleeved with the inner tube (1110); the air guide hose (1200) is connected to the inner tube (1110); a clamping cavity (1160) is formed between the outer tube (1120) and the inner tube (1110); the outer tube (1120) is provided with an inlet (1121) and an outlet (1122) in communication with the clamping cavity (1160); the inlet (1121) is suitable for introducing a coolant, and the outlet (1122) is suitable for discharging the coolant; Preferably, the inner tube (1110) comprises a first tube section (1111) and a second tube section (1112), the air guide hose (1200) is connected to the first tube section (1111), the second tube section (1112) is away from the air guide hose (1200) relative to the first tube section (1111), and the tube diameter of the second tube section (1112) is smaller than the tube diameter of the first tube section (1111).

10. A kiln atmosphere detection system, characterized in that: It comprises a gas analyzer and the kiln atmosphere sampling device (1000) according to any one of claims 1 to 9, wherein the gas analyzer is suitable for detecting the gas discharged from the gas outlet (1140).

Images