Gravity switch type blanking valve and blanking method

Abstract

The invention provides a gravity switch type discharging valve and a discharging method. The gravity switch type discharging valve comprises a valve body structure, a valve plate assembly and a counterweight assembly, and the valve body structure comprises a feeding port and a discharging port; the valve plate assembly comprises two valve plates which are rotatably arranged on the valve body, and counterweight mounting parts are arranged on the valve plates; the balance weight assembly comprises balance weight modules arranged on the two balance weight mounting parts correspondingly, and the balance weight modules can drive the two valve plates to rotate inwards so as to seal the discharging opening. The gravity switch type blanking valve can be driven by gravity to be automatically closed, dynamic sealing of a granulation area in the steel slag dry processing process is achieved, external cold air is effectively prevented from entering the high-temperature granulation area, heat loss is remarkably reduced, the stable thermal environment in a system is maintained, the sealing mechanism does not depend on external power control, and the sealing effect is good. The problem of sealing failure caused by power failure or control system faults is avoided, and a reliable guarantee is provided for continuous and efficient waste heat utilization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel slag treatment equipment, and particularly relates to a gravity switch type discharging valve and a discharging method. BACKGROUND

[0002] As a major by-product in the steel production process, the annual output of steel slag has exceeded 100 million tons. At present, the mature treatment processes meeting the requirements of ultra-low emission mainly include the pool type hot stripping method, the pressure hot stripping method, the roller method and the air granulation method, etc. Among them, the pool type hot stripping method and the pressure hot stripping method have a long history and mature technology, and are widely used in the treatment of converter steel slag. The process principle of the pool type hot stripping method and the pressure hot stripping method is to pour high-temperature steel slag into a special container, and to realize the stabilization treatment of free calcium oxide in the slag by water cooling and controlling the environmental pressure. After several generations of technical iteration, the existing system has realized a high level of automation and equipment, has strong adaptability to the flowability and alkalinity of steel slag, is simple to operate and stable to run, and is one of the mainstream processes with relatively optimal economic benefits at present. The roller method uses high-speed rotating equipment to impact and crush molten steel slag, and uses air or atomized water to realize rapid cooling, and has the advantages of high treatment efficiency, clean working environment, low capital and operating costs, etc. The steel slag treated by the roller method has uniform particle size and good stability, and can be directly used in the field of building materials, etc. However, the roller method process has the risk of explosion caused by the violent contact between water and high-temperature molten slag in the treatment process, and has high requirements for the flowability of the input steel slag, which limits its application in some working conditions. The air granulation method is a dry granulation technology, which uses high-pressure airflow to impact and cool molten steel slag, and can recover part of the sensible heat, and has the advantages of water and energy saving. The steel slag treated by the air granulation method has high particle hardness and low f-CaO content, but has large internal residual stress and may have post-transformation problems. In addition, the air granulation method has high noise, and is only suitable for liquid slag with good flowability, and usually needs to be used in cooperation with other processes to deal with different forms of steel slag.

[0003] Since steel slag can reach temperatures of up to 1550℃ at the furnace, it contains a large amount of high-quality waste heat, equivalent to the calorific value of approximately 50 kg of standard coal per ton of electric arc furnace slag. However, existing mainstream processes such as pool-type hot quenching, pressurized hot quenching, and drum methods are unable to effectively recover this heat, resulting in energy waste. Against this backdrop, developing a new generation of steel slag treatment technology and equipment that combines efficient processing with waste heat utilization has become an inevitable direction for the industry, especially for the flap valve equipment used in the storage and transportation of steel slag, which also faces the need for upgrading. Existing flap valve equipment typically relies on external power (such as motors, hydraulic or pneumatic devices) to achieve opening and closing. In the event of a power outage, control system failure, or actuator malfunction, it may fail to close in time, potentially exposing high-temperature zones and allowing large amounts of cold air to intrude, disrupting the thermal balance and severely affecting the stability and thermal efficiency of the waste heat recovery system. Simultaneously, some valves may not close tightly or have a delayed response, causing heat loss and flue gas leakage, not only reducing energy recovery rates but also potentially leading to safety hazards and environmental pollution. Therefore, how to automatically close flap valves without external force to effectively seal the granulation zone has become an urgent technical problem to be solved. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a gravity switch type feeding valve and feeding method, which is used to automatically close the flap valve without external force to effectively seal the granulation zone, thereby preventing cold air intrusion, ensuring waste heat recovery efficiency, and improving the operational safety and reliability of the system under high temperature and harsh working conditions.

[0005] The above-mentioned objective of this invention can be achieved by the following technical solution: This invention provides a gravity-operated feed valve, comprising: A valve body structure, the valve body structure including a feed inlet and a discharge outlet; A valve plate assembly, the valve plate assembly including two valve plates rotatably disposed on the valve body, the valve plates being provided with counterweight mounting portions; The counterweight assembly includes counterweight modules respectively disposed on the two counterweight mounting parts, and the counterweight modules are capable of driving the two valve plates to rotate inward to close the discharge port.

[0006] In a preferred embodiment of the present invention, the valve body structure includes a valve body and two valve body baffles spaced apart on the valve body. The top of the valve body is open to form the feed port, and the bottom of the valve body cooperates with the two valve body baffles to form the discharge port.

[0007] In a preferred embodiment of the present invention, the width of the valve body baffle plate gradually decreases from top to bottom to form a cone shape, and the two valve plates are respectively disposed on both sides of the valve body baffle plate.

[0008] In a preferred embodiment of the present invention, the valve body structure further includes a plurality of support arms disposed on the valve body and extending downward therefrom. Each support arm is provided with a rotating shaft. A connecting plate is provided at each end of the valve plate parallel to the rotating shaft. The connecting plate is disposed away from the discharge port. Each connecting plate is rotatably connected to one of the rotating shafts.

[0009] In a preferred embodiment of the present invention, the valve body structure further includes a connecting flange disposed on the top of the valve body.

[0010] In a preferred embodiment of the present invention, valve plate baffles are respectively provided on both sides of the valve plate, and the valve plate baffles are parallel to the valve body baffles.

[0011] In a preferred embodiment of the present invention, the valve plate baffle is triangular, rectangular, or trapezoidal in shape.

[0012] In a preferred embodiment of the present invention, the counterweight mounting part includes a mounting plate, which is disposed on the other side of the connecting plate relative to the valve plate. The mounting plate extends axially along the shaft and is connected to the connecting plate. A mounting groove is formed between the mounting plate and the two connecting plates, and the counterweight module is disposed in the mounting groove.

[0013] In a preferred embodiment of the present invention, the counterweight module includes a plurality of counterweights, which are detachably disposed in the mounting slot.

[0014] In a preferred embodiment of the present invention, the valve plate assembly further includes a wear-resistant pad laid on the valve plate.

[0015] In a preferred embodiment of the present invention, the valve body structure further includes a first reinforcing structure disposed on the valve body, the first reinforcing structure including a plurality of spaced first reinforcing ribs, the first reinforcing ribs extending along the height direction on the valve body.

[0016] In a preferred embodiment of the present invention, the valve body structure further includes a second reinforcing structure disposed on the support arm, the second reinforcing structure including at least one second reinforcing rib extending along the height direction on the support arm.

[0017] The present invention also provides a gravity-switch type feeding method, which is implemented using the aforementioned gravity-switch type feeding valve. The gravity-switch type feeding method includes the following steps: The gravity-operated feed valve is connected to the slag discharge port. When the steel slag is granulated and heated in the granulation zone, the gravity-operated feed valve is closed to form a closed space. After the steel slag has finished granulating and exothermic in the granulation zone, the steel slag falls from the slag outlet and impacts the gravity switch type discharge valve, causing the gravity switch type discharge valve to switch to the open state, and the steel slag passes through the gravity switch type discharge valve to fall. After the steel slag discharge is completed, the gravity switch type discharge valve automatically switches to the closed state through the counterweight component; Repeat the above steps to enter the production cycle.

[0018] The technical solution of the present invention has the following significant beneficial effects: The gravity-driven feed valve of this invention can achieve automatic closure by gravity drive, realizing dynamic sealing of the granulation zone in the dry treatment of steel slag. This sealing mechanism does not rely on external power control, avoiding sealing failure caused by power outages or control system malfunctions, and providing a reliable guarantee for continuous and efficient waste heat utilization.

[0019] In the absence of slag discharge, the valve plates automatically close under their own weight, forming a sealed space. This effectively prevents external cold air from entering the high-temperature granulation zone, significantly reducing heat loss and maintaining a stable thermal environment within the system, thereby improving waste heat recovery efficiency. During slag discharge, the high-temperature steel slag flow impacts the valve plates from top to bottom, overcoming the restoring torque generated by the counterweight components, causing the two valve plates to rotate outward and open, achieving automatic discharge. After discharge, as the flow is interrupted, the valve plates immediately rotate in the opposite direction to reset under the action of the counterweight components, quickly returning to the closed state.

[0020] This invention utilizes a combined control of material flow and gravity to achieve the entire opening and closing process, resulting in sensitive response and reliable operation. It eliminates the need for manual intervention or complex electrical control systems, significantly reducing equipment operation and maintenance costs and improving adaptability and stability under harsh conditions such as high temperatures and high dust levels. Furthermore, this gravity-operated discharge valve is compact, safe, and durable, possessing excellent versatility and expandability. It is not only suitable for handling molten steel slag but can also be widely applied to the discharge of other high-temperature metallurgical slags, such as stainless steel slag, refining slag, blast furnace slag, and submerged arc furnace slag. Moreover, this invention ensures automatic shut-off in emergency situations, enhancing the overall system's safety and environmental performance, and demonstrating significant energy-saving benefits and promising prospects for industrial application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0023] Figure 1 This is a schematic diagram of the gravity switch type feeding valve of the present invention in the closed state; Figure 2 This is a schematic diagram of the gravity switch type feeding valve of the present invention in the open state; Figure 3 This is a side view of one of the gravity switch type feed valves described in this invention.

[0024] The reference numerals in the above figures are as follows: 100. Valve body structure; 101. Inlet; 102. Outlet; 110. Valve body; 111. First reinforcing rib; 120. Valve body baffle; 130. Support arm; 131. Second reinforcing rib; 140. Rotating shaft; 150. Connecting flange; 200. Valve plate assembly; 210. Valve plate; 211. Valve plate baffle; 212. Wear-resistant pad; 220. Connecting plate; 230. Mounting plate; 300. Counterweight assembly; 310. Counterweight module; 311. Counterweight component. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Implementation Method 1

[0027] Please refer to the following: Figure 1 , Figure 2 and Figure 3As shown, an embodiment of the present invention provides a gravity-operated discharge valve, which includes a valve body structure 100, a valve plate assembly 200, and a counterweight assembly 300. The valve body structure 100 includes an inlet 101 and a discharge port 102. The valve plate assembly 200 includes two valve plates 210 rotatably mounted on the valve body 110, and the valve plates 210 are provided with counterweight mounting portions. The counterweight assembly 300 includes counterweight modules 310 respectively mounted on the two counterweight mounting portions. The counterweight modules 310 can drive the two valve plates 210 to rotate inward to close the discharge port 102.

[0028] Overall, this gravity-driven feeding valve can achieve automatic closure by gravity, realizing dynamic sealing of the granulation zone during the dry treatment of steel slag. This sealing mechanism does not rely on external power control, avoiding sealing failure caused by power outages or control system malfunctions, and providing a reliable guarantee for continuous and efficient waste heat utilization.

[0029] In the absence of slag discharge, such as Figure 1 In the embodiment shown, the valve plate 210 automatically closes under its own weight under the action of the counterweight, forming a closed space, which effectively blocks external cold air from entering the high-temperature granulation area, significantly reduces heat loss, maintains a stable thermal environment in the system, and thus improves the waste heat recovery efficiency.

[0030] During the slag removal process, such as Figure 2 In the embodiment shown, the high-temperature steel slag material flows down and impacts the valve plate 210, overcoming the restoring torque generated by the counterweight component 300, causing the two valve plates 210 to rotate outward and open, thus achieving automatic opening and discharge.

[0031] After the slag discharge is completed, as the material flow is interrupted, the valve plate 210 immediately rotates in the opposite direction to reset under the action of the counterweight component 300, and quickly returns to the closed state.

[0032] The entire opening and closing process of this invention is controlled by the coordinated flow of materials and gravity, resulting in sensitive response and reliable operation. It requires no manual intervention or complex electrical control systems, significantly reducing equipment operation and maintenance costs and improving adaptability and stability under harsh conditions such as high temperature and high dust. Furthermore, this invention ensures automatic shutdown in case of emergencies, enhancing the overall system's safety and environmental performance, and demonstrating significant energy-saving benefits and promising prospects for industrial application.

[0033] In addition, this gravity-operated discharge valve is compact, safe, durable, and has good versatility and expandability. It is not only suitable for the treatment of molten steel slag, but can also be widely used in the discharge of other high-temperature metallurgical slags such as stainless steel slag, refining slag, blast furnace slag, and submerged arc furnace slag.

[0034] In embodiments of the present invention, such as Figure 1In the embodiment shown, the valve body structure 100 includes a valve body 110 and two valve body baffles 120 spaced apart on the valve body 110. The top of the valve body 110 is open to form a feed inlet 101, and the bottom of the valve body 110 cooperates with the two valve body baffles 120 to form a discharge port 102.

[0035] The valve body structure 100 cooperates with the top feed port 101 and the bottom discharge port 102, which is composed of the valve body 110 and two spaced valve body baffles 120. Combined with the rotatable double valve plate 210 and the counterweight module 310, it realizes the sealing function of automatically closing by gravity without external force, effectively preventing cold air from entering the granulation zone, improving the waste heat recovery efficiency, and ensuring safety, stability and energy saving in the high-temperature metallurgical slag discharge process.

[0036] In one specific embodiment, such as Figure 1 In the embodiment shown, the width of the valve body baffle 120 gradually decreases from top to bottom to form a cone shape, and two valve plates 210 are respectively disposed on both sides of the valve body baffle 120.

[0037] The valve body baffle 120 adopts a tapered structure with a gradually decreasing width from top to bottom, which can cooperate with the valve body 110 to form a roughly V-shaped discharge port 102, increasing the area of ​​the discharge port 102. Each valve plate 210 can close one side of the V-shaped discharge port 102, which not only helps guide the steel slag to fall smoothly and reduces material accumulation and blockage, but also forms a tighter sealing fit when the valve plate 210 is closed, further improving the reliability of closing and the sealing effect, effectively preventing cold air from entering, and ensuring the stability of the thermal environment in the granulation zone.

[0038] In embodiments of the present invention, such as Figure 1 and Figure 3 In the embodiment shown, the valve body structure 100 also includes a plurality of support arms 130 disposed on the valve body 110 and extending downward therefrom. The support arms 130 are provided with a rotating shaft 140. The valve plate 210 is provided with a connecting plate 220 at each end parallel to the rotating shaft 140. The connecting plates 220 are disposed facing away from the discharge port 102. Each connecting plate 220 is rotatably connected to a rotating shaft 140.

[0039] In one specific embodiment, four support arms 130 are provided, with two support arms 130 corresponding to each valve plate 210. The support arms 130 are rotatably connected to the connecting plate 220 on the valve plate 210 via a rotating shaft 140, thereby forming a stable rotating structure. This improves the coaxiality and operational smoothness of the valve plate 210's opening and closing action, and enhances the rigidity and deformation resistance of the overall structure. In particular, it can maintain reliable rotation and effective sealing under high temperature and high load conditions, significantly improving the durability and operational stability of the equipment.

[0040] In an embodiment of the present invention, the valve body structure 100 further includes a connecting flange 150 disposed on the top of the valve body 110. The connecting flange 150 enables connection to the slag discharge port, ensuring connection reliability and installation efficiency.

[0041] In embodiments of the present invention, such as Figure 1 In the embodiment shown, valve plate baffles 211 are respectively provided on the two side edges of valve plate 210, and valve plate baffles 211 are parallel to valve body baffles 120.

[0042] By setting valve plate baffles 211 on valve plate 210, valve plate 210 and valve plate baffles 211 on both sides form a groove structure, which can prevent steel slag from falling from both ends of valve plate 210 into the gap between valve plate 210 and valve body baffle 120, thus ensuring rotation reliability.

[0043] Designers can adjust the specific shape and structure of the valve plate baffle 211 according to usage requirements, and no specific limitations are imposed here. In one specific embodiment, such as Figure 1 In the illustrated embodiment, the valve plate baffle 211 is triangular in shape. In another feasible embodiment, the valve plate baffle 211 is rectangular in shape. In yet another feasible embodiment, the valve plate baffle 211 is trapezoidal in shape.

[0044] In embodiments of the present invention, such as Figure 2 and Figure 3 In the embodiment shown, the counterweight mounting part includes a mounting plate 230, which is disposed on the other side of the connecting plate 220 relative to the valve plate 210. The mounting plate 230 extends along the axial direction of the rotating shaft 140 and is connected to the connecting plate 220. A mounting groove is formed between the mounting plate 230 and the two connecting plates 220, and the counterweight module 310 is disposed in the mounting groove.

[0045] By setting an mounting plate 230 extending axially along the rotating shaft 140 on the other side of the valve plate 210, the mounting plate 230 can form a mounting groove together with the connecting plates 220 on both sides to fix the counterweight module 310, thus realizing the stable installation of the counterweight and the reasonable distribution of the center of gravity. It also facilitates the disassembly and adjustment of the counterweight module 310, ensuring that the valve plate 210 can quickly and reliably reset and close automatically by gravity after discharge, thereby improving the response speed of valve action and the stability of long-term operation.

[0046] In embodiments of the present invention, such as Figure 3In the illustrated embodiment, the counterweight module 310 includes multiple counterweights 311, which are detachably mounted in the mounting slot. The counterweight module 310 consists of multiple detachably mounted counterweights 311 in the mounting slot. By increasing or decreasing the number of counterweights 311, the total weight can be flexibly adjusted, thereby precisely controlling the opening and closing torque and closing speed of the valve plate 210. This adapts to the discharge requirements under different working conditions, improving not only the reliability and response performance of the valve but also facilitating maintenance, replacement, and on-site debugging, enhancing the versatility and practicality of the equipment.

[0047] In embodiments of the present invention, such as Figure 1 and Figure 2 In the illustrated embodiment, the valve plate assembly 200 further includes a wear-resistant pad 212 laid on the valve plate 210. Specifically, the wear-resistant pad 212 is rectangular, and its material can be a wear-resistant metal material. Furthermore, the wear-resistant pad 212 is detachably connected to the valve plate 210 for easy maintenance or replacement.

[0048] By laying wear-resistant pads 212 on the surface of valve plate 210, the wear resistance of the area in direct contact between valve plate 210 and steel slag is significantly improved, extending the service life. At the same time, the maintenance frequency and replacement cost are reduced. It is especially suitable for harsh working conditions such as high temperature and high scouring of steel slag discharge, effectively ensuring the sealing performance and operational reliability of the valve during long-term operation.

[0049] In embodiments of the present invention, such as Figure 1 and Figure 2 In the embodiment shown, the valve body structure 100 further includes a first reinforcing structure disposed on the valve body 110. The first reinforcing structure includes a plurality of spaced first reinforcing ribs 111, which extend along the height direction and are disposed on the valve body 110.

[0050] By setting multiple first reinforcing ribs 111 extending along the height direction and arranged at intervals on the valve body 110, the overall structural strength and deformation resistance of the valve body 110 are effectively enhanced. Especially under high temperature, high pressure or high load conditions, the rigidity and stability of the valve body 110 can be significantly improved, preventing torsional deformation caused by thermal expansion or external force, thereby ensuring smooth valve opening and closing and reliable sealing, and extending the service life of the equipment.

[0051] In embodiments of the present invention, such as Figure 1 and Figure 3 In the embodiment shown, the valve body structure 100 further includes a second reinforcing structure disposed on the support arm 130. The second reinforcing structure includes at least one second reinforcing rib 131 extending along the height direction and disposed on the support arm 130.

[0052] By providing at least one second reinforcing rib 131 extending along the height direction on the support arm 130, the structural strength and load-bearing capacity of the support arm 130 are effectively improved, and the overall rigidity and stability of the valve are enhanced. In particular, when subjected to alternating loads or high-temperature deformation stress, it can reduce the risk of local deformation and fatigue cracking, thereby ensuring the accuracy of the movement of the valve plate 210 and the reliability of the sealing, and extending the service life of the valve under harsh working conditions.

[0053] Implementation Method 2

[0054] An embodiment of the present invention provides a gravity-switch type feeding method, which is implemented using a gravity-switch type feeding valve as described in Embodiment 1. The gravity-switch type feeding method includes the following steps: Step S1: Connect the gravity switch type feeding valve to the slag discharge port. When the steel slag is granulated and heated in the granulation zone, the gravity switch type feeding valve is in the closed state to form a closed space. Step S2: After the steel slag has finished granulating and exothermic in the granulation zone, the steel slag falls from the slag outlet and impacts the gravity switch type discharge valve, causing the gravity switch type discharge valve to switch to the open state, and the steel slag passes through the gravity switch type discharge valve for discharge. Step S3: After the steel slag discharge is completed, the gravity switch type discharge valve automatically switches to the closed state through the counterweight component 300; Step S4: Repeat the above steps to enter the production cycle.

[0055] Specifically, the gravity-operated feed valve is connected to the slag discharge port via the connecting flange 150. During the granulation and heat extraction process of the steel slag in the granulation zone, the two valve plates 210 and the valve body baffle plate 120 of the gravity-operated feed valve form a closed space, and the gravity-operated feed valve is in the closed state, which prevents a large amount of cold air from entering the granulation zone from the slag discharge port and improves the heat extraction efficiency of the granulation zone.

[0056] After the granulation and heat extraction process of steel slag is completed, the slag falls from the slag outlet. The steel slag flow impacts the wear-resistant pad 212 installed on the valve plate 210. Under the impact, the valve plate 210 rotates around the valve plate 210 shaft 140 and separates from the valve body baffle plate 120. The gravity switch type discharge valve is in the open state, and the steel slag falls through the gravity switch type discharge valve. The valve plate baffle plate 211 can ensure the discharge area of ​​the steel slag flow.

[0057] After the steel slag discharge is completed, under the action of the counterweight component 300, the valve plate 210 rotates in the opposite direction around the valve plate 210 shaft 140 and closes with the valve body baffle plate 120, and the gravity switch type discharge valve is closed again.

[0058] Repeat steps S1-S3 above to re-enter the production cycle.

[0059] The gravity-operated feeding valve can be used for feeding not only molten steel slag, but also other metallurgical slags, such as, but not limited to, molten stainless steel slag, molten refining slag, blast furnace slag, and submerged arc furnace slag.

[0060] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A gravity switch type blanking valve, characterized by, The application relates to a gravity switch type discharging valve. The valve body structure comprises a valve body and two valve body material blocking plates which are arranged on the valve body in a spaced manner, the top of the valve body is provided with an opening to form a feeding port, and the bottom of the valve body cooperates with the two valve body material blocking plates to form a discharging port. The width of the valve body material blocking plates gradually decreases in a top-to-bottom direction to form a taper, and the two valve plates are arranged on the two sides of the valve body material blocking plates respectively. The valve body structure further comprises a plurality of supporting arms which are arranged on the valve body and extend downwards, the supporting arms are provided with rotating shafts, the two ends of the valve plates which are parallel to the rotating shafts are respectively provided with a connecting plate, the connecting plate is arranged on the side which is away from the discharging port, and each connecting plate is rotationally connected with one rotating shaft.

2. The gravity switch unloader valve of claim 1, wherein, The valve body structure further comprises a connecting flange which is arranged on the top of the valve body.

3. The gravity switch unloader valve of claim 2, wherein, The two sides of the valve plates are respectively provided with valve plate material blocking plates which are parallel to the valve body material blocking plates.

4. The gravity switch unloader valve of claim 2, wherein, The valve plate material blocking plates are triangular, rectangular or trapezoidal in shape.

5. The gravity switch unloader valve of claim 2 wherein, The weight installation part comprises an installation plate which is arranged on the other side of the connecting plate relative to the valve plate, extends along the axial direction of the rotating shaft and is connected with the connecting plate, and an installation groove is formed between the installation plate and the two connecting plates, and the weight module is arranged in the installation groove.

6. The gravity switch unloader valve of claim 2, wherein, The weight module comprises a plurality of weight pieces which are detachably arranged in the installation groove.

7. The gravity switch unloader valve of claim 6 wherein, The valve plate assembly further comprises a wear-resistant pad plate which is arranged on the valve plate.

8. The gravity switch unloader valve of claim 4 wherein, The valve body structure further comprises a first reinforcing structure which is arranged on the valve body, the first reinforcing structure comprises a plurality of first reinforcing ribs which are arranged on the valve body in a spaced manner and extend along the height direction.

9. The gravity switch unloader valve of claim 8 wherein, The valve body structure further comprises a second reinforcing structure which is arranged on the supporting arm, the second reinforcing structure comprises at least one second reinforcing rib which extends along the height direction and is arranged on the supporting arm.

10. The gravity switch unloader valve of claim 1 wherein, The application discloses a gravity switch type discharging method which is realized by using the gravity switch type discharging valve.

11. The gravity switch unloader valve of claim 1 wherein, The gravity switch type discharging valve is connected with a slag outlet, and when the steel slag is granulated in a granulation area, the gravity switch type discharging valve is in a closed state to form a closed space.

12. The gravity switch unloader valve of claim 4 wherein, When the granulation of the steel slag in the granulation area is completed, the steel slag falls from the slag outlet and impacts the gravity switch type discharging valve, so that the gravity switch type discharging valve is switched to an open state, and the steel slag falls through the gravity switch type discharging valve.

13. A gravity switch type blanking method characterized by, When the steel slag falling is completed, the gravity switch type discharging valve is automatically switched to the closed state by the weight assembly. The above steps are repeated to realize production circulation. ​ ​ ​

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