Ventilation system and vacuum degreasing sintering furnace

Abstract

The utility model discloses a ventilation system and a vacuum degreasing sintering furnace, the ventilation system comprises a material box, a ventilation cavity is arranged in the material box, the ventilation system further comprises an air inlet safety valve and an exhaust safety valve, the air inlet safety valve and the air outlet safety valve can communicate with the ventilation cavity so that the external air pressure of the ventilation cavity and the external air pressure of the material box can be balanced, the air inlet safety valve or the air outlet safety valve comprises a ventilation structure, and the ventilation structure comprises a first ventilation channel and a balancing weight used for covering the first ventilation channel; and when the balancing weight ascends, the balancing weight is uncovered, so that gas passes through the first ventilation channel. According to the ventilation system and the vacuum degreasing sintering furnace, the air pressure difference between the interior and the exterior of the material box can be reduced, and the material box is prevented from being cracked or burst.

Description

Technical Field

[0001] This utility model relates to the technical field of sintering furnace structure, and particularly to a ventilation system and a vacuum degreasing sintering furnace. Background Technology

[0002] Sintering furnaces are common equipment in powder metallurgy manufacturing. After metal powder is pressed into a blank, the blank is placed in a sintering furnace. The sintering furnace heats the blank, causing the colloidal material in the blank to be converted into a gaseous state and discharged. The metal in the blank will form a blank of a specific shape. The blank is then processed or otherwise treated to finally obtain the desired product.

[0003] Commonly, protective gas is introduced into the sintering furnace to accelerate the discharge of colloidal gases.

[0004] However, when the gas inside the sintering furnace is not discharged in time, the gas pressure inside the sintering furnace's hopper increases, and the hopper is at risk of being cracked or broken. When a vacuum degreasing sintering furnace is used, the hopper is mostly made of graphite plates, which have lower strength and are at greater risk of being cracked or broken. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a ventilation system that can reduce the air pressure difference inside and outside the material box, thus preventing the material box from being cracked or broken.

[0006] This utility model also proposes a sintering furnace having the above-mentioned ventilation system.

[0007] This utility model also proposes a vacuum degreasing sintering furnace with the above-mentioned ventilation system.

[0008] A ventilation system according to a first aspect of the present invention includes a material box, wherein a ventilation chamber is provided inside the material box, and the ventilation system further includes an inlet safety valve and an exhaust safety valve, wherein the inlet safety valve and the exhaust safety valve are capable of communicating with the ventilation chamber to equalize the external air pressure of the ventilation chamber with that of the material box, wherein the inlet safety valve or the exhaust safety valve includes a ventilation structure, wherein the ventilation structure includes a first ventilation channel and a counterweight for covering the first ventilation channel, wherein when the counterweight rises, the counterweight releases the cover to allow gas to pass through the first ventilation channel.

[0009] A ventilation system and a vacuum degreasing sintering furnace according to an embodiment of the present invention have at least the following beneficial effects:

[0010] This invention incorporates an inlet safety valve and an outlet safety valve. Therefore, when the air pressure in the venting chamber is greater than the air pressure outside the material box, the pressure difference opens the outlet safety valve, allowing gas to flow from the venting chamber to the outside of the material box. Conversely, when the air pressure in the venting chamber is less than the air pressure outside the material box, the pressure difference opens the inlet safety valve, allowing gas to flow from the outside of the material box into the venting chamber. This design prevents both excessive pressure in the venting chamber from bursting the material box and insufficient pressure from crushing the material box. It is particularly suitable for vacuum degreasing sintering furnaces, preventing graphite material boxes from being damaged due to pressure differences.

[0011] This invention features a ventilation structure that includes a counterweight. The counterweight is used to open and close the safety valve, eliminating the need for complex circuit control. The structure is simple, reliable, practical, easy to arrange, and convenient for various applications, such as high-temperature environments. For example, in a vacuum degreasing sintering furnace with an outer and inner casing, the safety valve is placed on the inner casing to control the pressure difference between the inside and outside of the inner casing.

[0012] This invention incorporates a ventilation structure, including a counterweight, which controls the air pressure difference using the weight of the counterweight. This keeps the air pressure difference within a reasonable range, preventing frequent opening and closing of the safety valve, extending its service life, and reducing disassembly and maintenance.

[0013] This utility model also provides a sintering furnace, which has the above-mentioned beneficial effects.

[0014] This utility model also provides a vacuum degreasing sintering furnace, which has the above-mentioned beneficial effects.

[0015] According to a first aspect embodiment of the present invention, a ventilation system is provided with the ventilation structure in the exhaust safety valve. The exhaust safety valve includes a first control chamber for accommodating the lifting and lowering of the counterweight and a second ventilation passage communicating with the first control chamber. When the counterweight rises, the gas can flow from the first ventilation passage to the second ventilation passage, and the second ventilation passage discharges the gas to the outside of the material box.

[0016] The advantage of this invention is that by using the above-mentioned ventilation structure for the exhaust safety valve, when the air pressure in the ventilation chamber of the material box rises due to other factors, the gas can lift the counterweight, allowing the gas to be quickly discharged from the first ventilation channel to the second ventilation channel, thus preventing the material box from being burst.

[0017] When the air pressure in the hopper returns to normal, the counterweight falls and covers the first ventilator, blocking the gas flow between the first and second ventilators, without affecting the normal operation of the ventilator's ventilation chamber.

[0018] According to a first aspect of the present invention, a ventilation system includes an exhaust safety valve comprising a first seat and a first housing located on top of the first seat. The first seat is provided with a first ventilation passage and a second ventilation passage, and the first housing is provided with a first control cavity.

[0019] The advantages are: by using a first base and a first housing, the first air passage, the second air passage, and the first control cavity can be easily manufactured, reducing manufacturing difficulty. At the same time, the first housing can be removed from the first base for easy assembly and maintenance.

[0020] According to a first aspect of the present invention, a ventilation system is provided, wherein a first ventilation channel extends vertically through a first seat, and a second ventilation channel includes a first hole parallel to the first ventilation channel and a second hole perpendicularly connected to the first hole. The end of the first hole away from the second hole is connected to the first control cavity, and the end of the second hole away from the first hole is connected to the outside of the material box.

[0021] The advantage is that by making the first ventilation channel run through the first seat body from top to bottom, the path of the first channel can be simplified, which can both meet the gas discharge requirements and reduce the manufacturing difficulty.

[0022] This invention, by including a first hole parallel to the first air passage and a second hole perpendicularly connected to the first hole in the second air passage, facilitates the drill bit to drill through both the first hole and the first air passage simultaneously, reducing clamping and lowering processing costs.

[0023] The second hole is perpendicular to the first hole, which also makes it convenient to arrange channels in two perpendicular directions, so that gas can be easily discharged into the first vent and also easily discharged from the second vent to the outside of the material box.

[0024] According to a first aspect of the present invention, a ventilation system is provided in which a plurality of second ventilation channels are arranged in a ring around the first ventilation channel.

[0025] The advantage of this invention is that by setting multiple second air passages, the total exhaust area of ​​the second air passages can be increased by increasing the number of second air passages, thus avoiding the throttling effect of the second air passages and increasing exhaust resistance.

[0026] Meanwhile, by arranging multiple second ventilation channels around the first ventilation channel, this utility model makes reasonable use of the space around the first ventilation channel, which not only meets the arrangement requirements but also reduces the volume of the first seat and the space occupied, making the exhaust safety valve structure more compact.

[0027] According to a first aspect of the present invention, a ventilation system includes a first seat comprising a nozzle portion, the inner side of the nozzle portion forming a first ventilation channel, the outer side of the nozzle portion forming a first control cavity, and the top edge of the nozzle portion supporting the counterweight.

[0028] The advantages are: by setting the nozzle, this utility model can reduce the contact between the first seat and the counterweight, making it easier for the gas to lift the counterweight and facilitate the connection between the first air passage and the second air passage.

[0029] At the same time, by reducing the contact between the first seat and the counterweight, even if there is a small amount of adhesive, the exhaust safety valve can still open smoothly, ensuring that the exhaust safety valve can function properly and ensuring the safety of the material box.

[0030] According to a first aspect embodiment of the present invention, a ventilation system is provided with an air intake safety valve having the ventilation structure. The air intake safety valve includes a second control chamber for accommodating the lifting and lowering of the counterweight and a third ventilation channel communicating with the second control chamber. When the counterweight rises, the gas can flow from the first ventilation channel to the third ventilation channel. The air intake safety valve includes an air intake passage communicating with the ventilation chamber, and the air intake passage is provided with an air inlet and an air outlet communicating with the third ventilation channel.

[0031] The advantage of this invention is that by using the above-mentioned ventilation structure for the air intake safety valve, when the air pressure in the ventilation chamber of the material box drops due to other factors, the gas can lift the counterweight, allowing the gas to be quickly discharged from the first ventilation channel to the third ventilation channel, thus preventing the material box from being crushed.

[0032] When the air pressure in the hopper returns to normal, the counterweight falls and covers the first ventilator, blocking the gas flow between the first and third ventilators, without affecting the normal operation of the hopper's ventilation chamber.

[0033] According to a first aspect embodiment of the present invention, a ventilation system includes an intake safety valve comprising a second seat and a second housing located on top of the second seat. The second housing is provided with a second control chamber, a groove for forming the third ventilation channel, and a first through hole communicating with the groove. The second seat is provided with a nozzle for forming the first ventilation channel and an installation port for installing the nozzle. The installation port communicates with the outside of the intake safety valve. The second seat is provided with a second through hole coaxially communicating with the first through hole. The first through hole and the second through hole are used to cooperate to form the intake channel.

[0034] The advantage is that by setting up a second shell and a second base, the second shell can be used to easily form a second control cavity and a third air passage, reducing manufacturing difficulty.

[0035] This utility model, by setting a nozzle component, can adapt to situations where the intake safety valve is frequently opened by replacing the nozzle component, thereby reducing the cost of use. At the same time, it can also reduce the height of the second seat, thereby reducing the manufacturing cost.

[0036] Meanwhile, this utility model is equivalent to integrating an air intake safety valve into the air intake channel, which simplifies installation, eliminates the need for additional openings on the material box, reduces manufacturing difficulty, and does not affect the sealing of the material box.

[0037] According to a first aspect embodiment of the present invention, a ventilation system is provided with an air intake safety valve having the ventilation structure. The air intake safety valve includes a second seat, the second seat having a first ventilation channel, a counterweight being provided at the top of the first ventilation channel, the bottom of the first ventilation channel penetrating the bottom of the second seat, and the bottom of the second seat having a plurality of radially communicating grooves communicating with the first ventilation channel.

[0038] The advantages of this invention are: by setting it in the radial connecting groove, it is convenient to introduce external gas into the first ventilation channel, reducing the obstruction of the first ventilation channel by the material box. At the same time, the radial connecting groove can introduce air from multiple directions, reducing the air intake resistance. Meanwhile, the diameter of a single radial connecting groove is reduced to prevent foreign objects from being sucked in and causing blockage.

[0039] A sintering furnace according to a second aspect of the present invention includes an outer casing and a material box, the material box being located inside the outer casing, and the material box being provided with the aforementioned ventilation system.

[0040] The advantages are that, in addition to the benefits of a ventilation system, a sintering furnace with an outer casing and a material box can achieve gas exchange between the inside and outside of the material box when using the above-mentioned ventilation system, while avoiding the introduction of gas from outside the outer casing and thus avoiding affecting the sintering quality of the products inside the material box.

[0041] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the structure of the feed box of a sintering furnace according to an embodiment of the present utility model;

[0044] Figure 2 for Figure 1 Schematic diagram of the structure of the central intake safety valve;

[0045] Figure 3 for Figure 2 A bottom view of the intake safety valve.

[0046] Figure 4 for Figure 2 Cross-sectional view of the intake safety valve;

[0047] Figure 5 for Figure 1 Schematic diagram of the structure of the exhaust safety valve;

[0048] Figure 6 for Figure 5 A cross-sectional diagram of the exhaust safety valve.

[0049] Reference numerals: 100 - hopper, 110 - air inlet channel, 120 - air inlet safety valve, 130 - exhaust safety valve, 140 - first vent, 150 - counterweight, 160 - first control chamber, 170 - second vent, 180 - first seat, 190 - first housing, 200 - first hole, 210 - second hole, 220 - nozzle, 230 - second control chamber, 240 - third vent, 250 - vent, 260 - second seat, 270 - second housing, 280 - nozzle, 290 - radial connecting groove. Detailed Implementation

[0050] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0051] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0052] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0053] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0054] The following description, in conjunction with the accompanying drawings, describes a ventilation system and a vacuum degreasing sintering furnace according to an embodiment of the present invention.

[0055] This utility model aims to provide an embodiment of a sintering furnace, focusing on an embodiment of a vacuum degreasing sintering furnace, which includes an outer casing and... Figure 1 The material bin 100 shown is located inside the outer box.

[0056] Reference Figure 1 The present invention aims to provide an embodiment of a material box 100 for a vacuum degreasing sintering furnace, which employs a ventilation system.

[0057] Reference Figure 1 For the vacuum degreasing sintering furnace, the inside of the material box 100 is equipped with a ventilation chamber, in which powder metallurgy blanks are placed. When the blanks are heated, they emit a gel-like gas.

[0058] Meanwhile, the top of the material box 100 is connected to two air inlet channels 110. The air inlet channels 110 can fill the ventilation chamber with protective gas. The protective gas is mostly inert gas such as nitrogen. The bottom of the material box 100 is equipped with an exhaust pipe, which is connected to a vacuum pump. Then, the protective gas fills the ventilation chamber, and the vacuum pump extracts the colloidal gas to complete the sintering of the preform, so that the preform retains only the useful components.

[0059] Since this utility model does not involve any improvement to the working principle of the vacuum degreasing sintering furnace, the above text is merely a simple description of the working process of the vacuum degreasing sintering furnace and is not entirely accurate.

[0060] However, when the inflation is excessive or the venting is abnormal, the pressure inside the material box 100 will be greater than the pressure outside the material box 100. In addition, since the material box 100 is mostly made of graphite plate, there is a risk that the material box 100 will crack or break, affecting the use of the equipment.

[0061] In response, this utility model proposes a ventilation structure that can reduce the air pressure difference inside and outside the material box 100, thereby preventing the material box 100 from being cracked or broken.

[0062] In this embodiment, the ventilation system also includes an inlet safety valve 120 and an exhaust safety valve 130, which can connect the ventilation chamber to equalize the external air pressure of the ventilation chamber and the material box 100.

[0063] The intake safety valve 120 or exhaust safety valve 130 includes a ventilation structure, which includes a first ventilation channel 140 and a counterweight 150 for covering the first ventilation channel 140. When the counterweight 150 rises, the counterweight 150 is released from its cover to allow gas to pass through the first ventilation channel 140.

[0064] In summary, this embodiment, by setting an inlet safety valve 120 and an exhaust safety valve 130, allows the exhaust safety valve 130 to open when the air pressure in the venting chamber is greater than the air pressure outside the material box 100, allowing gas to flow from the venting chamber to the outside of the material box 100. Conversely, when the air pressure in the venting chamber is less than the air pressure outside the material box 100, the inlet safety valve 120 to open, allowing gas to flow from the outside of the material box 100 into the venting chamber. This design avoids both excessive pressure in the venting chamber that could break the material box 100 and insufficient pressure that could crush the material box 100. It is particularly suitable for vacuum degreasing sintering furnaces, preventing the graphite material box 100 from being damaged due to air pressure differences.

[0065] This embodiment sets up a ventilation structure, which includes a counterweight 150. The counterweight 150 is used to open and close the safety valve. There is no need for complex circuit control. The structure is simple, reliable and practical, easy to arrange, and convenient to apply to various scenarios, such as high-temperature environments. For example, in a vacuum degreasing sintering furnace with an outer box and an inner box, the safety valve is arranged on the inner box to control the pressure difference between the inside and outside of the inner box.

[0066] This embodiment sets up a ventilation structure, which includes a counterweight 150. The pressure difference is controlled by the weight of the counterweight 150, which can keep the pressure difference within a reasonable range, avoid frequent opening and closing of the safety valve, extend the service life of the safety valve, and reduce disassembly and maintenance.

[0067] In addition to the advantages of the ventilation system, the sintering furnace with the outer box and the material box 100 can achieve gas exchange between the inside and outside of the material box 100 when the ventilation system is used. At the same time, it avoids the introduction of gas from outside the outer box and avoids affecting the sintering quality of the products inside the material box 100.

[0068] In some specific embodiments of this utility model, the counterweight 150 can be a graphite block to prevent the safety valve from being completely blocked. In particular, it avoids the adhesion of gelatinous gas, which would change the pressure difference between opening and closing the safety valve and not affect normal operation.

[0069] In some specific embodiments of this utility model, an air inlet box can be provided on the top of the material box 100, and an air inlet safety valve 120 and an exhaust safety valve 130 can be provided on the air inlet box to reduce the probability of the air inlet safety valve 120 and the exhaust safety valve 130 coming into contact with the adhesive gas, thereby reducing the probability of the adhesive gas adhering to the components outside the material box 100 and protecting the sintering furnace.

[0070] Reference Figure 2 , Figure 3 and Figure 4 In some specific embodiments of this utility model, the intake safety valve 120 may be provided with a ventilation structure. The intake safety valve 120 includes a second control chamber 230 for accommodating the lifting and lowering of the counterweight 150 and a third ventilation channel 240 connected to the second control chamber 230. When the counterweight 150 rises, gas can flow from the first ventilation channel 140 to the third ventilation channel 240. The intake safety valve 120 includes an intake channel 110 connected to the ventilation chamber. The intake channel 110 is provided with an intake port and a ventilation port 250 connected to the third ventilation channel 240.

[0071] It is easy to understand that by adopting the above-mentioned ventilation structure for the air intake safety valve 120 in this embodiment, when the air pressure in the ventilation chamber of the material box 100 drops due to other factors, the gas can lift the counterweight 150, so that the gas can be quickly discharged from the first ventilation channel 140 to the third ventilation channel 240, thus preventing the material box 100 from being crushed.

[0072] When the air pressure in the material box 100 returns to normal, the counterweight 150 falls and covers the first ventilator 140, blocking the gas flow between the first ventilator 140 and the third ventilator 240, without affecting the normal operation of the ventilator chamber of the material box 100.

[0073] In some specific embodiments of this utility model, the intake safety valve 120 may include a second seat 260 and a second housing 270 located on top of the second seat 260. The second housing 270 is provided with a second control cavity 230, a groove for forming a third vent 240, and a first through hole communicating with the groove. The second seat 260 is provided with a nozzle 280 for forming a first vent 140 and a mounting port for mounting the nozzle 280. The mounting port communicates with the outside of the intake safety valve 120. The second seat 260 is provided with a second through hole coaxially communicating with the first through hole. The first through hole and the second through hole are used to cooperate to form an intake channel 110.

[0074] It is easy to understand that by providing a second housing 270 and a second seat 260 in this embodiment, the second control cavity 230 and the third ventilation channel 240 can be conveniently formed using the second housing 270, thereby reducing manufacturing difficulty.

[0075] This utility model, by setting the nozzle component 280, can adapt to the situation where the intake safety valve 120 is frequently opened by replacing the nozzle component 280, thereby reducing the cost of use. At the same time, it can also reduce the height of the second seat 260, thereby reducing the manufacturing cost.

[0076] Meanwhile, this utility model is equivalent to integrating an intake safety valve 120 into the intake channel 110, which simplifies installation, eliminates the need for additional openings on the material box 100, reduces manufacturing difficulty, and does not affect the sealing of the material box 100.

[0077] It is easy to understand that in this embodiment, by setting a second housing 270 and a second base 260, the second housing 270 is provided with a first through hole and the second base 260 is provided with a second through hole. Therefore, when the screw passes through the second housing 270 and the second base 260 and connects to the material box 100, the second housing 270 and the second base 260 can be fixed together at the same time, simplifying the installation and reducing the amount of screws used.

[0078] In some specific embodiments of this utility model, the intake safety valve 120 may be provided with a ventilation structure. The intake safety valve 120 includes a second seat 260, the second seat 260 is provided with a first ventilation channel 140, a counterweight 150 is provided at the top of the first ventilation channel 140, the bottom end of the first ventilation channel 140 penetrates the bottom of the second seat 260, and the bottom of the second seat 260 is provided with a plurality of radial connecting grooves 290 that communicate with the first ventilation channel 140.

[0079] It is easy to understand that by setting the radial connecting groove 290, this embodiment facilitates the introduction of external gas into the first ventilation channel 140, reduces the obstruction of the first ventilation channel 140 by the material box 100, and at the same time, the radial connecting groove 290 can introduce air from multiple directions, reducing the air intake resistance. Meanwhile, the diameter of a single radial connecting groove 290 is reduced to prevent foreign objects from being sucked in and causing blockage.

[0080] In some specific embodiments of this utility model, the second housing 270 can be fitted with a third housing, and the third housing cooperates to form the second control cavity 230, so as to reduce the height of the second housing 270. At the same time, it is convenient to carry out maintenance by disassembling and assembling the third housing, avoiding the increased maintenance workload caused by separating the second housing 270 from the second base 260.

[0081] Reference Figure 5 and Figure 6 In some specific embodiments of this utility model, the exhaust safety valve 130 may also be provided with a ventilation structure. The exhaust safety valve 130 includes a first control chamber 160 for accommodating the lifting and lowering of the counterweight 150 and a second ventilation channel 170 communicating with the first control chamber 160. When the counterweight 150 rises, gas can flow from the first ventilation channel 140 to the second ventilation channel 170, and the second ventilation channel 170 discharges the gas to the outside of the material box 100.

[0082] It is easy to understand that by adopting the above-mentioned ventilation structure for the exhaust safety valve 130 in this embodiment, when the air pressure in the ventilation chamber of the material box 100 rises due to other factors, the gas can lift the counterweight 150, so that the gas can be quickly discharged from the first ventilation channel 140 to the second ventilation channel 170, thus preventing the material box 100 from being burst.

[0083] When the air pressure in the material box 100 returns to normal, the counterweight 150 falls and covers the first ventilator 140, blocking the gas flow between the first ventilator 140 and the second ventilator 170, without affecting the normal operation of the ventilator of the material box 100.

[0084] In some specific embodiments of this utility model, the exhaust safety valve 130 may include a first seat 180 and a first housing 190 located on top of the first seat 180. The first seat 180 is provided with a first vent 140 and a second vent 170, and the first housing 190 is provided with a first control cavity 160.

[0085] It is easy to understand that by using the first base 180 and the first housing 190, the first ventilation channel 140, the second ventilation channel 170, and the first control cavity 160 can be easily manufactured, reducing manufacturing difficulty. At the same time, the first housing 190 can be removed from the first base 180 to complete disassembly and assembly, which facilitates assembly and maintenance.

[0086] In some specific embodiments of this utility model, the first ventilation channel 140 can penetrate the first seat 180 vertically, and the second ventilation channel 170 includes a first hole 200 parallel to the first ventilation channel 140 and a second hole 210 vertically connected to the first hole 200. The end of the first hole 200 away from the second hole 210 is connected to the first control cavity 160, and the end of the second hole 210 away from the first hole 200 is connected to the outside of the material box 100.

[0087] It is easy to understand that by making the first vent 140 pass through the first base 180 vertically, the path of the first channel can be simplified, which satisfies the gas discharge requirement and reduces the manufacturing difficulty. For example, a through hole can be directly machined using a drill bit, and the through hole forms the first vent 140.

[0088] The present invention makes the second ventilation channel 170 include a first hole 200 parallel to the first ventilation channel 140 and a second hole 210 vertically connected to the first hole 200, which makes it convenient for the drill bit to drill out the first hole 200 and the first ventilation channel 140 at the same time, reducing clamping and reducing processing costs.

[0089] The second hole 210 is perpendicular to the first hole 200, which also facilitates the arrangement of channels in two perpendicular directions, making it convenient for gas to enter the first vent 140 and for gas to exit from the second vent 170 to the outside of the material box 100.

[0090] In some specific embodiments of this utility model, the number of second ventilation channels 170 can be multiple, and the multiple second ventilation channels 170 are arranged in a ring around the first ventilation channel 140.

[0091] It is easy to understand that by setting multiple second air passages 170 in this embodiment, the total exhaust area of ​​the second air passages 170 can be increased by increasing the number of second air passages 170, thereby avoiding the throttling effect of the second air passages 170 and increasing exhaust resistance.

[0092] Meanwhile, by arranging multiple second ventilation channels 170 around the first ventilation channel 140, this utility model makes reasonable use of the space around the first ventilation channel 140, which not only meets the arrangement requirements but also reduces the volume of the first seat 180 and reduces the space occupied, making the exhaust safety valve 130 structure more compact.

[0093] In some specific embodiments of this utility model, the first base 180 and the first housing 190 can be cylindrical to reduce the space occupied, facilitate installation by rotation and fastening, and reduce the use of screws.

[0094] In some specific embodiments of this utility model, the first seat 180 may include a nozzle portion 220, the inner side of the nozzle portion 220 is used to form a first air passage 140, the outer side of the nozzle portion 220 is used to form a first control cavity 160, and the top edge of the nozzle portion 220 is used to support the counterweight 150.

[0095] It is easy to understand that by providing the nozzle 220, this embodiment can reduce the contact between the first seat 180 and the counterweight 150, making it easier for the gas to lift the counterweight 150 and facilitate the connection between the first air passage 140 and the second air passage 170.

[0096] At the same time, by reducing the contact between the first seat 180 and the counterweight 150, even if there is a small amount of adhesive, the exhaust safety valve 130 can still be opened smoothly, ensuring that the exhaust safety valve 130 can function properly and ensuring the safety of the material box 100.

[0097] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0099] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0100] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0101] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0102] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A ventilation system, comprising a hopper (100), wherein a ventilation chamber is provided within the hopper (100), characterized in that, The ventilation system also includes an intake safety valve (120) and an exhaust safety valve (130), which can connect the ventilation chamber to equalize the external air pressure of the ventilation chamber with that of the material box (100); The intake safety valve (120) or the exhaust safety valve (130) includes a ventilation structure, which includes a first ventilation passage (140) and a counterweight (150) for covering the first ventilation passage (140). When the counterweight (150) rises, the counterweight (150) releases the cover to allow gas to pass through the first ventilation passage (140).

2. The ventilation system according to claim 1, characterized in that, The exhaust safety valve (130) is provided with the ventilation structure. The exhaust safety valve (130) includes a first control chamber (160) for accommodating the lifting and lowering of the counterweight (150) and a second ventilation channel (170) connecting the first control chamber (160). When the counterweight (150) rises, the gas can flow from the first ventilation channel (140) to the second ventilation channel (170), and the second ventilation channel (170) discharges the gas to the outside of the material box (100).

3. A ventilation system according to claim 2, characterized in that, The exhaust safety valve (130) includes a first seat (180) and a first housing (190) located on top of the first seat (180). The first seat (180) is provided with a first vent (140) and a second vent (170). The first housing (190) is provided with a first control cavity (160).

4. A ventilation system according to claim 3, characterized in that, The first ventilation channel (140) extends vertically through the first seat (180). The second ventilation channel (170) includes a first hole (200) parallel to the first ventilation channel (140) and a second hole (210) vertically connected to the first hole (200). The end of the first hole (200) away from the second hole (210) is connected to the first control cavity (160), and the end of the second hole (210) away from the first hole (200) is connected to the outside of the material box (100).

5. A ventilation system according to claim 4, characterized in that, There are multiple second ventilation channels (170), and the multiple second ventilation channels (170) are arranged in a ring around the first ventilation channel (140).

6. A ventilation system according to claim 3, characterized in that, The first seat (180) includes a nozzle (220), the inner side of which forms the first air passage (140), the outer side of which forms the first control cavity (160), and the top edge of which supports the counterweight (150).

7. A ventilation system according to claim 1, characterized in that, The air intake safety valve (120) is provided with the ventilation structure. The air intake safety valve (120) includes a second control chamber (230) for accommodating the lifting and lowering of the counterweight (150) and a third ventilation channel (240) connected to the second control chamber (230). When the counterweight (150) rises, the gas can flow from the first ventilation channel (140) to the third ventilation channel (240). The air intake safety valve (120) includes an air intake channel (110) connected to the ventilation chamber. The air intake channel (110) is provided with an air inlet and an air outlet (250) connected to the third ventilation channel (240).

8. A ventilation system according to claim 7, characterized in that, The intake safety valve (120) includes a second seat (260) and a second housing (270) located on top of the second seat (260). The second housing (270) is provided with a second control chamber (230), a groove for forming the third vent (240), and a first through hole communicating with the groove. The second seat (260) is provided with a nozzle (280) for forming the first vent (140) and a mounting port for installing the nozzle (280). The mounting port communicates with the outside of the intake safety valve (120). The second seat (260) is provided with a second through hole coaxially communicating with the first through hole. The first through hole and the second through hole are used to cooperate to form the intake channel (110).

9. A ventilation system according to claim 1, characterized in that, The intake safety valve (120) is provided with the ventilation structure. The intake safety valve (120) includes a second seat (260). The second seat (260) is provided with the first ventilation channel (140). The top end of the first ventilation channel (140) is provided with the counterweight (150). The bottom end of the first ventilation channel (140) penetrates the bottom of the second seat (260). The bottom of the second seat (260) is provided with a plurality of radial connecting grooves (290) that connect to the first ventilation channel (140).

10. A sintering furnace, characterized in that, It includes an outer casing and a material bin (100), the material bin (100) being located inside the outer casing, and the material bin (100) being provided with a ventilation system according to any one of claims 1 to 9.

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