Molding material volatile component collecting device for casting

Abstract

The utility model discloses a casting molding material volatile component collecting device which comprises a heating furnace and a furnace tube penetrating through the heating furnace, a stop valve I is arranged at the end, extending out of the heating furnace, of the furnace tube, and a stop valve II and a stop valve III are arranged at the other end, extending out of the heating furnace, of the furnace tube and connected with a gas collecting assembly. Effective isolation in the volatile gas collection process is achieved. After a heating furnace heats a modeling material sample, the furnace tube is filled with volatile gas, air in the furnace tube is driven out and begins to be emitted, the problem of air mixing is avoided by closing the stop valve I and the stop valve III, then the volatile gas can be relatively purely collected by opening the stop valve II, a reliable guarantee is provided for subsequent gas component analysis, and the production efficiency is improved. And the operation process is simple and feasible. The volatile gas can be collected by simply opening or closing the stop valve, so that the volatile gas collecting device is high in adaptability and wide in application.

Description

Technical Field

[0001] This application belongs to the field of molding materials technology in the foundry industry, and particularly relates to a device for collecting volatile components of molding materials used in casting. Background Technology

[0002] In the field of casting technology, the materials used to manufacture molds (including sand cores, coatings, etc.) are collectively referred to as molding materials. Molding materials occupy an indispensable position in casting production, and their quality directly affects the quality of castings, production efficiency, production costs, and the environmental pollution caused by the casting process.

[0003] Determining the quantity and chemical composition of volatile components in molding materials is crucial for evaluating their environmental pollution impact. Currently, casting testing technology includes instruments for testing the gas emission of molding materials, used to measure the amount and rate of gas emission. Mature techniques for gas composition analysis also exist, such as chemical analysis, chromatography, and infrared spectroscopy. However, despite advancements in testing technology, the casting industry still faces challenges in collecting volatile components from molding materials. Existing collection equipment and methods often struggle to prevent the introduction of air (including nitrogen, oxygen, and carbon dioxide), or the insufficient volatile content of individual samples may prevent the collection of a sufficient volume of the volatile gas to be tested. In such cases, it is usually necessary to replace the volatile sample, but opening the volatile space to replace the sample inevitably introduces air, further complicating the analysis of volatile components in molding materials. Therefore, developing an efficient and accurate device for collecting volatile components from molding materials is of great significance for improving the accuracy of environmental pollution assessments in the casting industry. Utility Model Content

[0004] This invention provides a device for collecting volatile components of molding materials used in casting, so as to facilitate the collection of volatile components of molding materials and improve the accuracy and reliability of component analysis.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device for collecting volatile components of molding materials for casting includes a heating furnace and a furnace tube penetrating the heating furnace. One end of the furnace tube extending out of the heating furnace is equipped with a shut-off valve I, and the other end of the furnace tube extending out of the heating furnace is equipped with shut-off valves II and III and connected to a gas collection assembly. The molding material sample is placed in the furnace tube located inside the heating furnace. The heating furnace is heated, and after volatile gases are released from shut-off valves I and III, shut-off valves I and III are closed, and shut-off valve II is opened to collect pure volatile gases, thereby improving the accuracy of subsequent testing.

[0007] By employing the aforementioned volatile component collection device for molding materials, and through the installation of shut-off valves I, II, and I-II in conjunction with the furnace tube, effective isolation during the volatile gas collection process is achieved. When the molding material sample is heated in the furnace, and the volatile gases fill the furnace tube, expelling the air inside and beginning to escape, closing shut-off valves I and III prevents external air from entering the furnace tube through these two ports, thus solving the problem of air mixing. Subsequently, by opening shut-off valve II, relatively pure volatile gases can be collected, providing a reliable guarantee for subsequent gas composition analysis. The operation process is simple and easy to perform. The collection of volatile gases can be achieved simply by opening or closing the shut-off valves, demonstrating strong adaptability and wide applicability.

[0008] In a preferred embodiment, the heating furnace is an adjustable temperature electric furnace, and the operating temperature of the electric furnace is set to enable the collection of volatile components of the molding material at constant temperature or at varying temperatures.

[0009] By conducting constant temperature and temperature-dependent collection experiments, we can gain a comprehensive understanding of the volatility characteristics of molding materials at different temperatures. This helps to assess the applicability of molding materials under different environmental or process conditions.

[0010] In a preferred embodiment, the gas collection assembly includes a cooler and a gas collection bag. The volatile components are cooled by the cooler before entering the gas collection bag for collection. The volatile gases have a high temperature after leaving the heating furnace. Cooling by the cooler rapidly reduces the gas temperature, bringing it to a state more suitable for subsequent processing or analysis.

[0011] In a preferred embodiment, the cooler is a water-cooled cooler, the end of the shut-off valve II is connected to a heat-resistant hose, the heat-resistant hose is connected to the air inlet of the cooler, and the air collection bag is connected to the air outlet of the cooler through a hose.

[0012] Water-cooled coolers use water as a cooling medium and have a high efficiency in heat exchange. They can quickly reduce the temperature of volatile gases to the required level, ensuring that the gas is within a suitable temperature range before entering the gas collection bag. Heat-resistant hoses can safely transport high-temperature gases, improving the overall performance of the volatile component collection device.

[0013] In a preferred embodiment, the water-cooled cooler is provided with an inlet and an outlet. The inlet is connected to the water supply system via a valve, and the outlet is connected to a collection system to achieve water recycling.

[0014] In a preferred embodiment, the gas collection bag and the hose connector are detachably connected to allow for the replacement of gas collection bags of different volumes for quantitative collection of volatile components.

[0015] For example, the gas collection bag can be equipped with a shut-off valve to control the entry and exit of gas, or a hose clamp can be used to control the opening and closing of the gas inlet hose on the collection bag to ensure the sealing and integrity of the gas during the collection process. The gas collection bag and the hose connector on the cooler are connected in a detachable manner, which makes it simple and quick to replace the gas collection bag. It allows for the rapid replacement of gas collection bags of different volumes according to the test requirements to adapt to different scales of volatile component collection tasks.

[0016] In a preferred embodiment, a sample feeder is also included, which is used to feed the magnetic boat containing the molding material sample into the center of the furnace tube located inside the heating furnace.

[0017] In a preferred embodiment, the sample feeder includes a push rod and a handle, the end of which is designed as a hook to feed or pull the magnetic boat into or out of the furnace tube.

[0018] In a preferred implementation, the magnetic boat is fed into the center of the furnace tube when the handle end is at a set distance from the furnace tube end face.

[0019] By setting the distance between the end of the handle and the end face of the furnace tube, the position of the magnetic boat (and the sample placed in it) in the furnace tube can be precisely controlled, ensuring that the sample is in the same position in the furnace tube for each test, thereby ensuring the consistency of the heating environment. Since the placement position of the sample and the heating environment are consistent for each test, the test error caused by position or environmental differences can be significantly reduced, which helps to improve the accuracy and reliability of the test data.

[0020] In a preferred embodiment, the two ends of the furnace tube extending from the heating furnace are respectively connected to end cap assemblies, and the end cap assembly of the shut-off valve I is removed and installed to place or remove the sample inside the furnace tube.

[0021] The above structure has the following beneficial effects:

[0022] The volatile component collection device for casting molding materials disclosed in this application standardizes the collection of volatile components from molding materials, which can effectively promote the analysis of the composition of molding materials and the assessment of their environmental impact. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain this application and do not constitute an undue limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic diagram illustrating one embodiment of the volatile component collection device for casting molding materials of this application is shown.

[0025] Figure 2 A schematic diagram illustrating one embodiment of the sample feeder of this application is shown.

[0026] Label Explanation:

[0027] 1-Stop valve I; 2-End cap assembly; 21-Base; 22-Control instrument; 23-Tee; 24-Connecting pipe; 3-Heating furnace; 4-Furnace tube; 5-Stop valve II; 6-Stop valve III; 7-Heat-resistant hose; 8-Cooler; 80-Outlet; 81-Inlet; 9-Gas collection bag; 10-Sample feeder; 100-Sample pusher; 101-Handle. Detailed Implementation

[0028] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit and scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0029] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation, and therefore should not be construed as a limitation of this utility model. In this utility model, unless otherwise expressly specified and limited, the first feature being "upper" or "lower" than the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through a transition structure, but are connected solely through a connecting structure to form a whole. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] In this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0032] The present invention will now be described with reference to the accompanying drawings.

[0033] The specific solution adopted is as follows:

[0034] like Figure 1-2 As shown, the volatile component collection device of the molding material consists of a heating furnace 3, a furnace tube 4, left and right end cover assemblies 2, a stop valve I 1, a stop valve II 5, a stop valve III 6, a cooler 8, a gas collection bag 9, a connecting pipe 24, a control instrument 22, and a sampler 10.

[0035] The heating furnace is an adjustable temperature electric furnace with a rated operating temperature of 1200℃. During operation, it can adopt two working modes: constant temperature molding material volatile matter collection and temperature-dependent molding material volatile matter collection.

[0036] 1. Collection of volatile components from constant-temperature molding materials

[0037] The collection of volatile components from constant-temperature molding materials refers to the collection of volatile components from molding materials at a constant temperature.

[0038] Set the operating temperature of the electric furnace on the control instrument 22 on the base 21, and start the electric furnace. Weigh the sample to be tested that has been dried to constant weight.

[0039] Once the electric furnace reaches and stabilizes at the set temperature, loosen the left clamp, remove the left end cap and left gasket, and use... Figure 2 The sample feeder 10, as shown, delivers the magnetic boat containing the molding material sample into the center of the furnace tube. The sample feeder is then removed, and the left gasket and left end cap are placed on top and locked with the left clamp. Shut-off valves II5 and III6 are installed at the two ports of the tee 23. When volatile gases emerge from shut-off valves I1 and III6, shut-off valves I and III are closed respectively, and shut-off valve II5 is opened. The inlet valve connecting to the cooler's inlet is then opened. The volatile components of the molding material enter the gas collection bag 9 (if the gas collection bag has a shut-off valve, it should be opened) through the furnace tube 4, shut-off valve II5, heat-resistant hose 7, and cooler 8, thus beginning the collection of volatile components from the molding material. During this process, the opening of the inlet valve should be maintained to ensure that the cooling water level and temperature in the cooler remain basically stable.

[0040] The gas collection bag volume is selectable from 1L to 40L. After the gas volume in the gas collection bag reaches the required volume for analysis and detection, if further collection of volatile components from other samples is needed, close the inlet valve and shut-off valve II connected to the inlet, and open shut-off valves I and III. If the gas collection bag has its own shut-off valve, close the shut-off valve on the gas collection bag, remove the gas collection bag, install a new gas collection bag, and open the shut-off valve on the new gas collection bag. If the gas collection bag does not have a shut-off valve, fold up the gas delivery hose on the gas collection bag, clamp it with a hose clamp to seal the gas collection bag, then remove the gas collection bag and replace it with a new one. Loosen the left clamp, remove the left end cap and left gasket, and use... Figure 2 The sample feeder shown pulls the magnetic boat out of the furnace tube. The left gasket and left end cap are then replaced and locked with the left clamp, initiating the next cycle for collecting volatile components from the molding material.

[0041] If the amount of volatile matter in a single sample is insufficient for the required gas volume for analysis, a multi-sample accumulation method can be used. Once the sample has produced virtually no volatile matter, close shut-off valve II and open shut-off valves I and III. Following the steps described above, remove the magnetic boat and use a sample feeder to insert the boat containing the new sample into the center of the furnace tube. Place the left gasket and left end cap on top and secure them with the left clamp. When volatile gas emerges from shut-off valves I and III, close shut-off valves I and III respectively and open shut-off valve II. Repeat this process until the amount of volatile matter in the gas collection bag reaches the required gas volume for analysis. Then, depending on whether to continue collecting volatile gas, complete the corresponding operation according to the steps described above.

[0042] If no further volatile matter collection is to be conducted, the electric furnace switch, the water inlet valve connected to inlet 81, and shut-off valve II should be turned off, while shut-off valves I and III should be opened. Remove the gas collection bag and magnetic boat following the aforementioned steps. After the furnace temperature drops to room temperature, replace the left gasket and left end cap, and tighten them with the left clamp. Drain the water from the cooler.

[0043] II. Collection of Volatile Matter from Temperature-Constant Molding Materials

[0044] Temperature-dependent volatile matter collection of molding materials refers to the collection of volatile matter from molding materials between room temperature and a certain set temperature.

[0045] Loosen the left clamp, remove the left end cap and left gasket, and use... Figure 2The sample feeder is used to deliver the magnetic boat containing the molding material sample into the center of the furnace tube. The sample feeder is then removed, and the left gasket and left end cap are placed on top and secured with the left clamp. The operating temperature of the electric furnace is set on control instrument 22, and the furnace is started. When volatile gases emerge from shut-off valves I and III, shut-off valves I and III are closed, shut-off valve II is opened, and the water inlet valve connected to the cooler inlet is opened to begin collecting the volatiles of the molding material. Once the electric furnace reaches the set temperature, the electric furnace, shut-off valve II, and the water inlet valve connected to the inlet are closed, and shut-off valves I and III are opened. If the gas in the gas collection bag reaches the required volume for analysis and detection, the gas collection bag is removed according to the aforementioned procedure for ending the test, the magnetic boat is removed, and the collection of volatiles from the molding material is complete. If the amount of gas in the gas collection bag is insufficient for analysis and testing, turn off the electric furnace and cooling water, close shut-off valve II, open shut-off valves I and III, remove the magnetic boat, but do not remove the gas collection bag. After the furnace temperature drops to room temperature, repeat the above steps to collect the volatile matter from the molding material. Continue this process until the amount of gas in the gas collection bag reaches the required amount for analysis and testing. Then, remove the gas collection bag and the magnetic boat according to the steps for ending the collection of volatile matter from the molding material, thus ending the collection of volatile matter from the molding material.

[0046] The cooler is a water-cooled cooler. The end of the shut-off valve II is connected to a heat-resistant hose. The water-cooled cooler is equipped with an inlet 81 and an outlet 80. The inlet is connected to the water supply system via a valve, and the outlet is connected to the collection system to realize water recycling. In addition, its internal ventilation pipes are arranged in a serpentine or tubular pattern to ensure sufficient heat exchange.

[0047] To facilitate sample delivery to the center of the furnace tube, the sample feeder includes a pusher rod 100 and a handle 101. The end of the pusher rod is designed as a hook to feed or pull the magnetic boat into or out of the furnace tube. Markings can be set on the pusher rod. See [link to documentation]. Figure 2 When the distance between end face A of the sample feeder and the end of the furnace tube reaches the designed distance, the magnetic boat is fed into the center of the furnace tube. The distance between the end of the handle and the end face of the furnace tube can be set to 10mm.

[0048] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0049] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A device for collecting volatile components of molding materials used in casting, characterized in that, The system includes a heating furnace and a furnace tube that runs through the heating furnace. One end of the furnace tube extending out of the heating furnace is equipped with a shut-off valve I, and the other end of the furnace tube extending out of the heating furnace is equipped with shut-off valves II and III and connected to a gas collection assembly. The molding material sample is placed in the furnace tube located inside the heating furnace. The heating furnace is heated, and after volatile gases are released from shut-off valves I and III, shut-off valves I and III are closed, and shut-off valve II is opened to collect pure volatile gases to improve the accuracy of subsequent testing.

2. The device for collecting volatile components of molding materials for casting according to claim 1, characterized in that, The heating furnace is an adjustable temperature electric furnace. The working temperature of the electric furnace is set so that it can collect volatile components of the molding material at constant temperature or at varying temperatures.

3. The device for collecting volatile components of molding materials for casting according to claim 1, characterized in that, The gas collection assembly includes a cooler and a gas collection bag. The volatile components are cooled by the cooler and then collected in the gas collection bag.

4. The device for collecting volatile components of molding materials for casting according to claim 3, characterized in that, The cooler is a water-cooled cooler. The end of the shut-off valve II is connected to a heat-resistant hose, which is connected to the air inlet of the cooler. The air collection bag is connected to the air outlet of the cooler through a hose.

5. The device for collecting volatile components of molding materials for casting according to claim 4, characterized in that, The water-cooled cooler has an inlet and an outlet. The inlet is connected to the water supply system via a valve, and the outlet is connected to the collection system to achieve water recycling.

6. The device for collecting volatile components of molding materials for casting according to claim 4, characterized in that, The gas collection bag and hose connector are detachable to allow for the replacement of gas collection bags of different volumes for quantitative collection of volatile components.

7. The device for collecting volatile components of molding materials for casting according to claim 1, characterized in that, It also includes a sample feeder, which is used to feed a magnetic boat containing a sample of the molding material into the center of the furnace tube inside the heating furnace.

8. A device for collecting volatile components of molding materials for casting according to claim 7, characterized in that, The sample feeder includes a push rod and a handle, with one end of the push rod designed as a hook to feed or pull the magnetic boat into or out of the furnace tube.

9. A device for collecting volatile components of molding materials for casting according to claim 8, characterized in that, When the handle end is at a set distance from the furnace tube end face, the magnetic boat is sent into the center of the furnace tube.

10. A device for collecting volatile components of molding materials for casting according to claim 1, characterized in that, The furnace tube extends out of the heating furnace and is connected to the end cap assembly at both ends. The end cap assembly of the shut-off valve I is removed and installed to place or remove the sample inside the furnace tube.

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