slag storage device

Abstract

This invention proposes a slag storage device, comprising: a slag storage box with a slag storage chamber inside; a spiral feed pipe located inside the slag storage box, with its inlet end extending out of the slag storage box, an airflow channel of variable size formed on the inner side of the spiral feed pipe, and a through hole communicating with the airflow channel on the inner wall of the spiral feed pipe; and a negative pressure forming unit communicating with the airflow channel. The slag storage device of this invention can solve the problem of localized, severe impacts on the slag storage device by large, high-speed moving slag (or slag rock) under vertical shaft pneumatic slag removal conditions.

Description

Technical Field

[0001] This invention relates to the field of pneumatic conveying system technology, and more particularly to a slag storage device with buffering function for use in a pneumatic conveying system. Background Technology

[0002] During vertical shaft excavation, the excavation depth can reach hundreds of meters, and the working conditions are extremely harsh. Conventional muck removal methods, such as scraper conveyors and slurry circulation, are inefficient and complex. Pneumatic conveying, due to its high efficiency and simple installation, has been widely used in vertical shaft projects. However, the characteristics of muck removed by pneumatic conveying in vertical shaft operations are significant: firstly, the particle size is large (up to 100mm); secondly, the kinetic energy of the conveyed muck is high. When large pieces of muck enter the end storage device, due to inertia, they continue to move at high speed. This high kinetic energy causes a strong impact on the inner wall of the storage device, resulting in momentary violent vibration and noise. Prolonged localized impacts can cause severe wear and even leakage in the storage device. This impact is particularly pronounced when there are many hard rock blocks in the excavated strata, posing a significant safety hazard to the pneumatic muck removal system in vertical shafts. Summary of the Invention

[0003] The purpose of this invention is to provide a slag storage device that solves the problem of localized and severe impacts on the slag storage device caused by large chunks of slag (or slag stones) moving at high speed under vertical shaft pneumatic slag removal conditions.

[0004] This invention provides a slag storage device, comprising:

[0005] The slag storage box has a slag storage chamber inside.

[0006] A spiral feed pipe is located inside the slag storage box. The inlet end of the spiral feed pipe extends out of the slag storage box. An air flow channel with variable space size is formed on the inner side of the spiral feed pipe. A through hole communicating with the air flow channel is provided on the inner wall of the spiral feed pipe.

[0007] A negative pressure forming unit is connected to the airflow channel.

[0008] In a preferred embodiment of the present invention, the diameter of the spiral feed tube gradually increases from the inlet end to the outlet end of the spiral feed tube.

[0009] In a preferred embodiment of the present invention, a support ring is connected to the inner top wall of the slag storage box, and the spiral feed pipe is sleeved and fixed on the support ring.

[0010] In a preferred embodiment of the present invention, the slag storage device further includes:

[0011] An elastic element is disposed inside the spiral feed tube, and the airflow channel is formed between the elastic element and the spiral feed tube.

[0012] In a preferred embodiment of the present invention, the negative pressure forming unit has an exhaust pipe connected to the air flow channel, and the exhaust pipe is provided with a fan and a first regulating valve.

[0013] In a preferred embodiment of the present invention, the negative pressure forming unit further includes an inflation conduit, the elastic element has a gas inlet and a gas outlet, and the inflation conduit is connected between the gas inlet and the outlet of the blower.

[0014] In a preferred embodiment of the present invention, a second regulating valve is provided on the inflation pipe.

[0015] In a preferred embodiment of the present invention, the gas outlet is connected to a venting pipe that communicates with the outside, and the venting pipe is provided with a third regulating valve.

[0016] In a preferred embodiment of the present invention, the negative pressure forming unit further includes a blowing pipe, one end of which is connected to the outlet of the blower, and the other end of which passes through the slag storage box and the spiral feed pipe and is connected to the internal space of the spiral feed pipe.

[0017] In a preferred embodiment of the present invention, a fourth regulating valve is provided on the air blowing duct.

[0018] In a preferred embodiment of the present invention, a vibration sensor is provided inside the slag storage box.

[0019] In a preferred embodiment of the present invention, a first pressure sensor is provided on the side wall of the slag storage box, and a second pressure sensor is provided in the air flow channel.

[0020] Compared with the prior art, the present invention has the following features and advantages:

[0021] The slag storage device of the present invention uses a spiral feed pipe in the slag storage box to change the direction of movement of the linearly high-speed slag. When moving along the spiral line, the inner wall of the spiral feed pipe can effectively reduce the movement speed of large pieces of slag along the tangent, thus playing a buffering role. Furthermore, the diameter of the spiral feed pipe gradually increases from the inlet end to the outlet end. The larger the pipe diameter, the smaller the air velocity. While meeting the slag conveying requirements, the reduction in air velocity can decelerate the slag and achieve further buffering.

[0022] The slag storage device of the present invention has a through hole on the spiral feed pipe that connects the inside of the pipe to the air flow channel. By controlling the size of the air flow channel, the air flow rate is changed, thereby controlling the gas pressure in the air flow channel. When the air pressure in the air flow channel is lower than the pressure in the spiral feed pipe, the through hole will have an adsorption effect on large pieces of slag in the spiral feed pipe. Since the direction of this adsorption effect is a centripetal force from the outside to the inside, when the adsorption effect is large enough, it can increase the friction between the large pieces of slag and the inner wall of the spiral feed pipe, thereby achieving a deceleration and buffering effect on the large pieces of slag. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the slag storage device described in this invention.

[0026] Explanation of icon numbers:

[0027] 10. Slag storage box; 11. Slag storage chamber; 12. Support ring;

[0028] 20. Spiral feed tube; 21. Inlet end; 22. Outlet end; 23. Through hole;

[0029] 30. Airflow channel;

[0030] 40. Negative pressure forming unit; 41. Air extraction pipe; 411. Fan; 412. First regulating valve; 413. Filter; 42. Air filling pipe; 421. Second regulating valve; 43. Air blowing pipe; 431. Fourth regulating valve;

[0031] 50. Elastic element; 51. Gas inlet; 52. Gas outlet; 53. Venting pipe; 531. Third regulating valve;

[0032] 60. Vibration sensor; 61. First pressure sensor; 62. Second pressure sensor. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0034] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] like Figure 1 As shown, the present invention provides a slag storage device, which includes: a slag storage box 10, with a slag storage chamber 11 formed inside; a spiral feed pipe 20 located inside the slag storage box 10, with the inlet end 21 of the spiral feed pipe 20 extending out of the slag storage box 10, an air flow channel 30 with a variable space size formed on the inner side of the spiral feed pipe 20, and a through hole 23 communicating with the air flow channel 30 on the inner wall of the spiral feed pipe 20; and a negative pressure forming unit 40, which is connected to the air flow channel 30.

[0037] The slag storage device of the present invention has a spiral feed pipe in the slag storage box 10, which changes the direction of movement of the linearly high-speed slag. When moving along the spiral line, the inner wall of the spiral feed pipe 20 can effectively reduce the movement speed of large pieces of slag along the tangent, playing a buffering role and preventing the high-speed slag from directly impacting the box wall of the slag storage box 10 and causing damage to the slag storage box 10.

[0038] In the slag storage device of the present invention, the through hole 23 on the spiral feed pipe 20 connects the inside of the pipe to the air flow channel 30. By controlling the size of the air flow channel 30, the air flow rate inside it is changed, thereby controlling the gas pressure inside the air flow channel 30. When the air pressure inside the air flow channel 30 is lower than the pressure inside the spiral feed pipe 20, the through hole 23 will have an adsorption effect on the large pieces of slag inside the spiral feed pipe 20. Since the direction of this adsorption effect is a centripetal force from the outside to the inside, when the adsorption effect is large enough, it can increase the friction between the large pieces of slag and the inner wall of the spiral feed pipe 20, thereby achieving a deceleration and buffering effect on the large pieces of slag.

[0039] The slag storage device described in this invention is installed in a pneumatic slag removal system for storing slag. In specific applications, it can be used in the slag removal system of a shaft boring machine. When the shaft is shallow, the slag storage device is located at the shaft opening and connected to the slag extraction pipe inside the shaft. When the shaft is deep, the slag storage device can be installed inside the shaft and connected to the slag extraction pipe inside the shaft. After a certain amount of slag has been stored in the slag storage device, the device is opened to remove the slag.

[0040] Specifically, such as Figure 1 As shown, the slag storage box 10 is the outer shell of the slag storage device, and its interior forms a relatively sealed slag storage chamber 11. The slag pumped out from the slag extraction pipe enters the slag storage box 10 and is temporarily stored in the slag storage chamber 11. In this embodiment, in order to better adapt the slag storage box 10 to the vertical shaft, the slag storage box 10 is a cylindrical structure, and its interior forms a cylindrical slag storage chamber 11. In other embodiments of the present invention, the shape of the slag storage box 10 can be designed according to actual needs, and is not specifically limited here.

[0041] The slag storage chamber 11 is equipped with a spiral feed pipe 20 extending in a spiral direction, which plays a major role in buffering the slag. The inlet end 21 of the spiral feed pipe 20 passes through the side wall of the slag storage box 10 and is connected to the external slag extraction pipe. The outlet end 22 of the spiral feed pipe 20 is located inside the slag storage chamber 11. The slag in the slag extraction pipe can enter the spiral feed pipe 20. The slag continuously changes direction and collides with the pipe wall inside the spiral feed pipe 20 to achieve deceleration. After deceleration, the slag enters the slag storage box 10 through the outlet end 22 of the spiral feed pipe 20. In this embodiment, the spiral feed pipe 20 is coaxially arranged with the cylindrical slag storage box 10.

[0042] Furthermore, an air channel 30 is formed on the inner side of the spiral feed pipe 20. This air channel 30 is equivalent to a subspace defined by the spiral feed pipe 20 within the slag storage chamber 11, and this subspace is connected to the slag storage chamber 11.

[0043] First, the spiral feed pipe 20 extends in a spiral shape, so the air channel 30 is a cylindrical space. In this embodiment, the pipes of adjacent layers of the spiral feed pipe 20 are closely attached together, so the sidewall of the air channel 30 is relatively sealed, and the gas flow direction in the air channel 30 is along the axial direction of the cylinder.

[0044] Secondly, the sidewall of the spiral feed pipe 20 is provided with multiple through holes 23 facing the air flow channel 30. These through holes 23 can connect the internal space of the spiral feed pipe 20 and the air flow channel 30. When the air pressure in the air flow channel 30 is lower than the internal pressure of the spiral feed pipe 20, the through holes 23 will have an adsorption effect on the large pieces of slag in the spiral feed pipe 20. Since the direction of this adsorption effect is a centripetal force from the outside to the inside, when the adsorption effect is large enough, it can increase the friction between the large pieces of slag and the inner wall of the spiral feed pipe 20, thereby achieving a deceleration and buffering effect on the large pieces of slag.

[0045] Finally, the size of the airflow channel 30 can be varied. By controlling the size of the airflow channel 30, the airflow velocity within it can be changed, thereby controlling the gas pressure within the airflow channel 30 to be lower than the gas pressure within the spiral feed pipe 20. The change in the size of the airflow channel 30 can be achieved by incorporating an expandable / contractable component or a telescopic component within the airflow channel 30. The expansion of the expandable / contractable component or the extension of the telescopic component reduces the size of the airflow channel 30, thereby controlling the air pressure within the airflow channel 30. The specific structure of the expandable / contractable component or the telescopic component is not limited here, as long as it can change the size of the airflow channel 30.

[0046] The slag storage box 10 is also connected to a negative pressure forming unit 40 that communicates with the air flow channel 30. The air in the slag storage chamber 11 enters the negative pressure forming unit 40 after passing through the air flow channel 30, thereby creating a vacuum negative pressure in the slag storage box 10, so that the slag continuously enters the slag storage chamber 11 through the spiral feed pipe 20. The negative pressure forming unit 40 can use a blower 411 to create a vacuum in the slag storage box 10, or it can use other methods, which are not specifically limited here.

[0047] The structure and technical effects of the preferred embodiment of the slag storage device of the present invention will be further described below.

[0048] According to one embodiment of the present invention, such as Figure 1 As shown, the diameter of the spiral feed tube 20 gradually increases from the inlet end 21 to the outlet end 22.

[0049] The spiral feed pipe 20 adopts a variable diameter setting. The larger the pipe diameter, the lower the air velocity. While meeting the requirements for transporting slag, the reduction in air velocity can slow down the slag and achieve further buffering.

[0050] According to one embodiment of the present invention, such as Figure 1 As shown, a support ring 12 is connected to the inner top wall of the slag storage box 10, and the spiral feed pipe 20 is sleeved and fixed on the support ring 12.

[0051] Specifically, the support ring 12 is a cylindrical structure with openings at the top and bottom, and its diameter is the same as the inner diameter of the spiral feed pipe 20. The spiral feed pipe 20 is sleeved and fixed on the support ring 12. In this embodiment, the support ring 12 is fixed to the top inner wall of the slag storage box 10. The spiral feed pipe 20 is fixed by the support ring 12 on its inner side, and the air flow channel 30 is formed on the inner side of the support ring 12. The support ring 12 forms the sidewall of the air flow channel 30, so the pipes of adjacent layers of the spiral feed pipe 20 do not need to be tightly arranged together. Correspondingly, in order to realize the communication between the internal space of the spiral feed pipe 20 and the air flow channel 30, the support ring 12 has a through hole at the corresponding position of the through hole 23.

[0052] According to one embodiment of the present invention, such as Figure 1 As shown, the slag storage device also includes an elastic element 50, which is disposed inside the spiral feed pipe 20, and an air flow channel 30 is formed between the elastic element 50 and the spiral feed pipe 20. In this embodiment, the expansion and contraction of the elastic element 50 are controlled by inflating or deflating the air, thereby controlling the size of the air flow channel 30.

[0053] Specifically, such as Figure 1 As shown, the elastic element 50 is cylindrical in shape and is coaxially arranged with the spiral feed tube 20. The air flow channel 30 formed between the elastic element 50 and the spiral feed tube 20 is an annular cylindrical space. The elastic element 50 has a gas inlet 51 and a gas outlet 52. An inflation pipe 42 is connected to the gas inlet 51, and a deflation pipe 53 is connected to the gas outlet 52. The expansion and contraction of the elastic element 50 are achieved by inflating through the inflation pipe 42 or deflating through the deflation pipe 53.

[0054] Furthermore, the inflation pipe 42 is provided with a second regulating valve 421, and the deflation pipe 53 is provided with a third regulating valve 531; the second regulating valve 421 controls the opening and closing of the inflation pipe 42 and the inflation speed, and the third regulating valve 531 controls the opening and closing of the deflation pipe 53 and the deflation speed.

[0055] According to one embodiment of the present invention, such as Figure 1As shown, the negative pressure forming unit 40 has an exhaust pipe 41 connected to the air flow channel 30, and the exhaust pipe 41 is equipped with a fan 411 and a first regulating valve 412.

[0056] Specifically, the extraction pipe 41 is located outside the slag storage box 10. One end of the pipe passes through the top wall of the slag storage box 10 and connects to the air flow channel 30, while the other end connects to the external space. When the fan 411 on the extraction pipe 41 is working, the air in the slag storage chamber 11 enters the extraction pipe 41 after passing through the air flow channel 30, and then enters the external space through the extraction pipe 41, thereby creating a negative pressure in the slag storage chamber 11. The first regulating valve 412 can control the opening and closing of the extraction pipe 41.

[0057] Preferably, a filter 413 is provided at the inlet of the blower 411 to filter impurities in the air and prevent fine soil from entering the blower 411.

[0058] Furthermore, the inlet of the air-filling pipe 42 is connected to the outlet of the blower 411; the air extracted by the air-extraction pipe 41 is used as the filling air for the elastic element 50, eliminating the need for a separate air source to inflate the elastic element 50, thus simplifying the structure of the slag storage device.

[0059] According to one embodiment of the present invention, such as Figure 1 As shown, the negative pressure forming unit 40 also has a blowing pipe 43. One end of the blowing pipe is connected to the outlet of the blower 411, and the other end passes through the slag storage box 10 and the spiral feed pipe 20 and is connected to the internal space of the spiral feed pipe 20.

[0060] Specifically, the blowing pipe 43 and the air filling pipe 42 are connected in parallel, and they share the same pipe section at the end connected to the outlet of the blower 411. The other end of the blowing pipe 3 passes through the top wall of the slag storage box 10 and the outer wall of the spiral feed pipe 20 and is connected to the internal space of the spiral feed pipe 20. The air outlet of the end of the blowing pipe 43 passing through the spiral feed pipe 20 faces the radial inner side of the spiral feed pipe 20. Air is blown into the spiral feed pipe 20 through the blowing pipe 43 to further increase the friction between the slag and the inner wall of the spiral feed pipe 20, thereby achieving further buffering of large pieces of slag.

[0061] Furthermore, a fourth regulating valve 431 is provided on the air blowing pipe 43. The air volume in the air blowing pipe 43 is controlled by the fourth regulating valve 431, thereby controlling the radial inward pushing force of the air outlet of the air blowing pipe 43 on the slag in the spiral feed pipe 20.

[0062] According to one embodiment of the present invention, such as Figure 1As shown, a vibration sensor 60 is installed inside the slag storage box 10. The vibration sensor 60 can detect the vibration state of the slag storage box 10. When the vibration of the slag storage box 10 is detected to be relatively severe, the elastic element 50 is inflated through the air inlet pipe 42, which reduces the gas pressure in the air channel 30. This increases the difference ΔP between the gas pressure in the spiral feed pipe 20 and the gas pressure in the air channel 30, strengthens the adsorption force of the through hole 23 on the slag in the spiral feed pipe 20, and increases the deceleration and buffering effect on the slag.

[0063] According to one embodiment of the present invention, such as Figure 1 As shown, a first pressure sensor 61 is provided on the side wall of the slag storage box 10, and a second pressure sensor 62 is provided in the air flow channel 30. Because the diameter of the spiral feed pipe 20 is relatively large, the gas pressure in the slag storage chamber 11 is not significantly different from the gas pressure inside the spiral feed pipe 20 during slag feeding. To facilitate measurement, a first pressure sensor 61 is provided on the side wall of the slag storage box 10 to detect the gas pressure inside the spiral feed pipe 20. In this embodiment, the second pressure sensor 62 is located on the inner side wall of the support ring 12 to detect the gas pressure inside the air flow channel 30.

[0064] The specific operating procedure of the slag storage device described in this invention during slag storage operations is as follows:

[0065] Step S1: Before starting the slag storage device to extract slag, set the vibration range detected by the vibration sensor 60 during normal operation to AB, and the normal variable range of the pressure difference ΔP detected by the first pressure sensor 61 and the second pressure sensor 62 to 0-b, with a limit range of cd (ΔP value cannot be too large; if it exceeds the limit value d, it is considered that the air flow channel 30 is too small, the air flow channel 30 is blocked, and negative pressure cannot be formed in the slag storage chamber 11).

[0066] Step S2: Then turn on the blower 411, keep the first regulating valve 412 fully open, and run it under no-load (i.e., no slag conveying). Read the pressure difference ΔP detected by the first pressure sensor 61 and the second pressure sensor 62. When ΔP is within the normal range of 0-b, there is no need to adjust the first regulating valve 412, the second regulating valve 421, and the third regulating valve 531. When ΔP > b, it indicates that the air passage 30 in the slag storage device is too narrow and the pressure is too low, which is not conducive to the operation of the slag storage device. Then, open the third regulating valve 531, keep the second regulating valve 421 closed, and let the elastic element 50 release and contract until ΔP drops to the range of 0-b. Then, close the third regulating valve 531, and the adjustment is complete.

[0067] Step S3: Start the entire pneumatic slag removal system to transport the slag, and use vibration sensor 60 to detect changes in the vibration signal of the slag storage box 10. When the vibration value detected by vibration sensor 60 is within the range of AB, no adjustment is needed; when the vibration value detected by vibration sensor 60 is greater than B, it is determined that the impact of large pieces of slag on the slag storage box 10 is significant, and it is necessary to increase the adsorption effect of the through hole 23 on the spiral feed pipe 20 on the slag to reduce the impact. Open the second regulating valve 421, adjust the first regulating valve 412, and keep the third regulating valve 531 closed, so that the air flow from the outlet of the blower 411 enters the elastic element 50 to expand it, thereby reducing the space size of the air flow channel 30, increasing the pressure difference ΔP, and increasing the adsorption effect of the through hole 23 on large pieces of slag.

[0068] During the increase of the pressure difference ΔP, the vibration sensor 60 is monitored in real time. If the vibration value detected by the vibration sensor 60 is within the AB range before ΔP reaches the value b, the adjustment is stopped. If the vibration value detected by the vibration sensor 60 is still greater than B when ΔP reaches the value b, the fourth regulating valve 431 is opened, and a high-speed airflow is injected radially inward into the spiral feed pipe 20 through the air blowing pipe 43 to increase the centripetal force of the slag. During the adjustment of the fourth regulating valve 431, the vibration sensor 60 is monitored in real time. If the vibration value detected by the vibration sensor 60 is within the AB range before ΔP reaches the limit value d, the adjustment is stopped. If the vibration value detected by the vibration sensor 60 is still greater than B when the pressure difference ΔP increases to the maximum value d during the adjustment process, all adjustments are stopped, and the slag storage device is shut down for safety testing.

[0069] After completing the above adjustments, the vibration value detected by the vibration sensor 60 is monitored in real time. If the vibration value is within the range of AB and ΔP is within 0-b, and the vibration value decreases, the second regulating valve 421 and the third regulating valve 531 are adjusted accordingly to contract the elastic element 50 and prevent excessive centripetal force. If ΔP is within bd and the vibration value decreases, the fourth regulating valve 431 is adjusted accordingly to reduce or close the jet airflow at the outlet of the blower duct 43 and prevent excessive centripetal force.

[0070] Step S4: Monitor the vibration value detected by the vibration sensor 60 in real time. If the value is not within the predetermined range, perform the adjustment in step S3 to ensure that the vibration range detected by the vibration sensor 60 is within AB. The system can continue to operate normally and achieve buffering of large pieces of slag.

[0071] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A slag storage device, characterized in that, include: The slag storage box (10) has a slag storage chamber (11) inside. A spiral feed pipe (20) is located inside the slag storage box (10). The inlet end (21) of the spiral feed pipe (20) extends out of the slag storage box (10). An air flow channel (30) with variable space size is formed on the inner side of the spiral feed pipe (20). A through hole (23) communicating with the air flow channel (30) is provided on the inner wall of the spiral feed pipe (20). A negative pressure forming unit (40) is connected to the air flow channel (30). An elastic element (50) is disposed inside the spiral feed tube (20), and an air flow channel (30) is formed between the elastic element (50) and the spiral feed tube (20); The negative pressure forming unit (40) has an air inlet pipe (42) and an air extraction pipe (41). The air extraction pipe (41) is connected to the air flow channel (30), and a fan (411) is provided on the air extraction pipe (41). The elastic element (50) has a gas inlet (51) and a gas outlet (52), and the inflation pipe (42) is connected between the gas inlet (51) and the outlet of the blower (411); The gas outlet (52) is connected to a venting pipe (53) that communicates with the outside.

2. The slag storage device according to claim 1, characterized in that, From the inlet end (21) of the spiral feed tube (20) to the outlet end (22) of the spiral feed tube (20), the diameter of the spiral feed tube (20) gradually increases.

3. The slag storage device according to claim 1 or 2, characterized in that, A support ring (12) is connected to the inner top wall of the slag storage box (10), and the spiral feed pipe (20) is sleeved and fixed on the support ring (12).

4. The slag storage device according to claim 1, characterized in that, The air extraction pipe (41) is equipped with a first regulating valve (412).

5. The slag storage device according to claim 4, characterized in that, The inflation pipe (42) is equipped with a second regulating valve (421).

6. The slag storage device according to claim 4, characterized in that, The venting pipe (53) is equipped with a third regulating valve (531).

7. The slag storage device according to claim 4, characterized in that, The negative pressure forming unit (40) also has a blowing pipe (43), one end of which is connected to the outlet of the blower (411), and the other end passes through the slag storage box (10) and the spiral feed pipe (20) and is connected to the internal space of the spiral feed pipe (20).

8. The slag storage device according to claim 7, characterized in that, The air blowing pipe (43) is equipped with a fourth regulating valve (431).

9. The slag storage device according to claim 1, characterized in that, The slag storage box (10) is equipped with a vibration sensor (60).

10. The slag storage device according to claim 1, characterized in that, A first pressure sensor (61) is provided on the side wall of the slag storage box (10), and a second pressure sensor (62) is provided in the air flow channel (30).

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