Pneumatic slag stone conveying system dust and ash removal device and vertical shaft heading machine

Abstract

The utility model relates to a pneumatic slag stone conveying system dust and ash removal device and a vertical shaft heading machine, and the pneumatic slag stone conveying system dust and ash removal device comprises at least one gas-slag separation tank, at least one ash collection tank, a cyclone dust collector, a bag type dust collector and a negative pressure fan, an ash inlet of the ash collecting tank is connected with an ash discharging port of the cyclone dust collector and / or the bag type dust collector through a corresponding ash inlet pipeline in an on-off mode, at least one ash inlet pipeline is connected with an air supplementing pipeline in an on-off bypass mode, and the air supplementing pipeline can be communicated with the outside atmosphere; and an ash outlet of the ash collecting tank is connected with each gas-slag separation tank through a corresponding ash outlet pipeline in an on-off manner. According to the utility model, the problems that the labor intensity is high as slag stones and dust generated by the cyclone dust collector and the bag type dust collector need to be cleaned by a specially-assigned person, the slag discharging process is complicated, and the secondary pollution to the tunnel environment in the dust cleaning process is solved.

Description

Technical Field

[0001] The utility model relates to the field of slag discharging of shaft tunneling machines, in particular to a dust removal and ash cleaning device for a pneumatic slag and stone conveying system and a shaft tunneling machine. Background Art

[0002] During the construction of a cutting shaft tunneling, a pneumatic slag and stone conveying system is equipped. After the gas-slag separation, the system brings dust and small particles into a cyclone dust collector and a bag filter with high-speed air, and separates from the air under the action of the two dust collectors, so that the small particle slag remains at the bottom of the cyclone dust collector and the dust remains at the bottom of the bag filter. The slag and dust are discharged into a temporary storage box outside the dust collector through the ash discharge valves at the bottoms of the two dust collectors. When the box is full, it is manually transferred to a hanging bucket and sent to the ground slag yard through the hanging bucket. This process requires additional labor and requires separate transportation of the slag and dust separated from the cyclone dust collector and the bag filter. This process will interrupt the construction and slag discharging of the tunneling machine, causing the tunneling to stop, not only increasing the slag discharging process but also generating a large amount of dust during the manual ash cleaning process, causing secondary pollution in the tunnel and posing a health hazard to the construction workers. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a dust removal and ash cleaning device for a pneumatic slag and stone conveying system and a shaft tunneling machine, which solves the problems of the need for special personnel to clean the slag and dust generated by the cyclone dust collector and the bag filter, with high labor intensity, the complicated slag discharging process, and the secondary pollution of the tunnel environment during the ash cleaning process.

[0004] The purpose of the utility model can be achieved by the following technical solutions:

[0005] The utility model provides a dust removal and ash cleaning device for a pneumatic slag and stone conveying system, including at least one gas-slag separation tank, at least one ash collection tank, a cyclone dust collector, a bag filter and a negative pressure fan; the inlet of the gas-slag separation tank is connected to the slag inlet pipeline in a switchable manner, the outlet of the gas-slag separation tank is connected to the inlet of the cyclone dust collector in a switchable manner, the outlet of the cyclone dust collector is communicated with the inlet of the bag filter, and the outlet of the bag filter is connected to the negative pressure fan; the ash inlet of the ash collection tank is connected to the ash discharge port of the cyclone dust collector and / or the bag filter in a switchable manner through a corresponding ash inlet pipeline, and a supplementary air pipeline is connected in parallel to at least one ash inlet pipeline in a switchable manner, and the supplementary air pipeline can be communicated with the outside atmosphere; the ash outlet of the ash collection tank is connected to each gas-slag separation tank in a switchable manner through a corresponding ash outlet pipeline.

[0006] In a preferred embodiment of the utility model, the number of gas-slag separation tanks is at least two.

[0007] In a preferred embodiment of the present utility model, the number of ash collection tanks is two. The ash inlet of one ash collection tank is connected to the ash discharge port of the cyclone dust collector through an ash inlet pipeline in a switchable manner, and the ash inlet of the other ash collection tank is connected to the ash discharge port of the bag filter through another ash inlet pipeline in a switchable manner; a supplementary air pipeline is connected to each of the two ash inlet pipelines in a switchable manner.

[0008] In a preferred embodiment of the present utility model, the number of gas-slag separation tanks is two. The ash outlet of one ash collection tank is connected to the two gas-slag separation tanks through a first ash discharge pipeline and a second ash discharge pipeline respectively in a switchable manner, and the ash outlet of the other ash collection tank is connected to the two gas-slag separation tanks through a third ash discharge pipeline and a fourth ash discharge pipeline respectively in a switchable manner.

[0009] In a preferred embodiment of the present utility model, the number of gas-slag separation tanks is one. The ash outlet of one ash collection tank is connected to the gas-slag separation tank through a first ash discharge pipeline in a switchable manner, and the ash outlet of the other ash collection tank is connected to the gas-slag separation tank through a fourth ash discharge pipeline in a switchable manner.

[0010] In a preferred embodiment of the present utility model, the number of ash collection tanks is one. The ash inlet of the ash collection tank is connected to the ash discharge port of the cyclone dust collector and the ash discharge port of the bag filter through two ash inlet pipelines respectively in a switchable manner; a supplementary air pipeline is connected to one of the ash inlet pipelines in a switchable manner.

[0011] In a preferred embodiment of the present utility model, the number of gas-slag separation tanks is two. The ash outlet of the ash collection tank is connected to the two gas-slag separation tanks through a first ash discharge pipeline and a second ash discharge pipeline respectively in a switchable manner.

[0012] In a preferred embodiment of the present utility model, the number of gas-slag separation tanks is one. The ash outlet of the ash collection tank is connected to the gas-slag separation tank through a first ash discharge pipeline in a switchable manner.

[0013] In a preferred embodiment of the present utility model, an inlet slag electric control valve and an outlet gas electric control valve are respectively provided at the inlet and outlet of the gas-slag separation tank, and a switchable slag discharge door is provided at the bottom slag discharge port of the gas-slag separation tank; a cyclone dust removal ash discharge valve is provided at the ash discharge port of the cyclone dust collector, and a bag filter ash discharge valve is provided at the ash discharge port of the bag filter; a supplementary air electric control valve is provided on the supplementary air pipeline, a discharge ash electric control valve is provided at the ash outlet of the ash collection tank, and an inlet ash electric control valve is further provided at the top of the gas-slag separation tank. The inlet ash electric control valve can be connected to the ash outlet of the ash collection tank through a corresponding pipeline.

[0014] In a preferred embodiment of the present utility model, vibrators are provided on the outer wall of the ash collection tank and each ash discharge pipeline; and / or a stirrer is provided inside the ash collection tank.

[0015] The present utility model also provides a shaft tunneling machine, which includes the dust removal and ash cleaning device of the pneumatic slag conveying system described above.

[0016] As described above, for the dust removal and ash cleaning device of the pneumatic slag conveying system and the shaft tunneling machine of the present utility model, at least one ash collecting tank is provided between the gas-slag separation tank, the cyclone dust collector and the bag filter, and a gas supply pipeline is arranged. After the amount of slag and stone in the gas-slag separation tank reaches the warning value and the feeding into this tank stops, the inside of this tank is in a negative pressure state. After first connecting the gas supply pipeline with the ash collecting tank to make the inside of the ash collecting tank at atmospheric pressure, and then connecting the ash collecting tank with this gas-slag separation tank, the pressure difference can be utilized to automatically press the slag particles and dust in the ash collecting tank into this gas-slag separation tank. When the slag in this gas-slag separation tank is discharged, the slag particles and dust pressed into the tank can be cleaned together, eliminating the need for special personnel to separately clean the slag and dust generated by the cyclone dust collector and the bag filter, reducing additional labor, avoiding secondary pollution to the tunnel environment during the process of manual ash cleaning alone, and greatly simplifying the slag discharging process. Description of the Drawings

[0017] The following drawings are only intended to illustrate and explain the present utility model, and do not limit the scope of the present utility model. Among them:

[0018] Figure 1 : is a schematic structural diagram of the dust removal and ash cleaning device of the pneumatic slag conveying system provided by the present utility model corresponding to Embodiment 1.

[0019] Figure 2 : is a schematic structural diagram of the dust removal and ash cleaning device of the pneumatic slag conveying system provided by the present utility model corresponding to Embodiment 2.

[0020] Figure 3 : is a schematic structural diagram of the dust removal and ash cleaning device of the pneumatic slag conveying system provided by the present utility model corresponding to Embodiment 3.

[0021] Figure 4 : is a schematic structural diagram of the dust removal and ash cleaning device of the pneumatic slag conveying system provided by the present utility model corresponding to Embodiment 4.

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] 1. Gas-slag separation tank; 11. Feed pipeline; 12. Gas outlet pipeline; 13. Feed electric control valve; 14. Gas outlet electric control valve; 15. Slag discharge door; 16. Ash inlet electric control valve;

[0024] 2. Ash collecting tank; 21. Ash inlet pipeline; 22. First ash outlet pipeline; 23. Second ash outlet pipeline; 24. Third ash outlet pipeline; 25. Fourth ash outlet pipeline; 26. Ash discharge electric control valve;

[0025] 3. Gas supply pipeline; 31. Gas supply electric control valve;

[0026] 4. Cyclone dust collector; 41. Cyclone dust removal ash discharge valve; 42. Intermediate pipeline;

[0027] 5. Bag dust collector; 51. Bag dust removal ash discharge valve; 52. Discharge pipeline;

[0028] 6. Negative pressure fan. Specific implementation manner

[0029] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific implementation manner of the present utility model will now be described with reference to the accompanying drawings.

[0030] As Figures 1 to 4 shown, the present application provides a dust removal and ash cleaning device for a pneumatic slag and stone conveying system, including at least one gas-slag separation tank 1, at least one ash collection tank 2, a cyclone dust collector 4, a bag dust collector 5, and a negative pressure fan 6; the inlet of the gas-slag separation tank 1 is connected to the slag inlet pipeline 11 in a switchable manner, the outlet of the gas-slag separation tank 1 is connected to the inlet of the cyclone dust collector 4 in a switchable manner, the outlet of the cyclone dust collector 4 is communicated with the inlet of the bag dust collector 5, and the outlet of the bag dust collector 5 is connected to the negative pressure fan 6; the ash inlet of the ash collection tank 2 is connected to the ash discharge port of the cyclone dust collector 4 and / or the bag dust collector 5 through the corresponding ash inlet pipeline 21 in a switchable manner, and a makeup air pipeline 3 is connected in parallel to at least one ash inlet pipeline 21 in a switchable manner, and the makeup air pipeline 3 can be communicated with the outside atmosphere; the ash outlet of the ash collection tank 2 is connected to each gas-slag separation tank 1 through the corresponding ash outlet pipeline in a switchable manner.

[0031] It can be understood that the above-mentioned slag inlet pipeline 11 extends downward to the working surface where the slag is generated. The device has a slag suction mode and a slag discharge and ash discharge mode. When in the slag suction mode, the negative pressure fan 6 is started, and air and slag and stones enter the gas-slag separation tank 1 from the bottom of the tunnel through the slag inlet pipeline 11 for gas-slag separation. After separation, the air will carry the unseparated fine particles and dust and enter the cyclone dust collector 4 and the bag dust collector 5 in sequence through the corresponding pipeline (i.e., the outlet pipeline 12) for primary dust removal and secondary dust removal. The bottoms of the cyclone dust collector 4 and the bag dust collector 5 can discharge the fine particles and dust into the corresponding ash collection tank 2 through the corresponding ash inlet pipeline 21; at this time, the ash inlet pipeline 21 is not communicated with the makeup air pipeline 3, and the ash collection tank 2 is not communicated with the gas-slag separation tank 1.

[0032] When the amount of slag stones in the gas-slag separation tank 1 reaches the warning value, the feeding of slag into this tank stops. The pipeline between the ash outlet of the gas-slag separation tank 1 and the ash outlet of the ash collection tank 2 is connected to the gas-slag separation tank 1, the air supply pipeline 3 is connected to the corresponding ash inlet pipeline 21, and then the pipeline between the ash outlet of the gas-slag separation tank 1 and the ash outlet of the ash collection tank 2 is connected to the ash outlet of the ash collection tank 2. In this way, the slag particles and dust in the ash collection tank 2 can be pressed into the gas-slag separation tank 1 under the action of atmospheric pressure. At this time, the pressure in the gas-slag separation tank 1 is close to the external atmospheric pressure, and the slag discharge door 15 at the bottom of the gas-slag separation tank 1 can be easily opened for slag discharge.

[0033] Thus, in the dust removal and ash cleaning device of the pneumatic slag stone conveying system in this embodiment, by providing at least one ash collection tank 2 between the gas-slag separation tank 1 and the cyclone dust collector 4 and the bag filter 5, and setting the air supply pipeline 3. After the amount of slag stones in the gas-slag separation tank 1 reaches the warning value and the feeding of slag into this tank stops, the inside of this tank is in a negative pressure state. After first connecting the air supply pipeline 3 to the ash collection tank 2 to make the inside of the ash collection tank 2 at atmospheric pressure, and then connecting the ash collection tank 2 to the gas-slag separation tank 1, the slag particles and dust in the ash collection tank 2 can be automatically pressed into the gas-slag separation tank 1 by using the pressure difference. When the gas-slag separation tank 1 discharges slag, the slag particles and dust pressed into the tank can be cleaned together, eliminating the need for special personnel to separately clean the slag stones and dust generated by the cyclone dust collector 4 and the bag filter 5, reducing additional labor, avoiding secondary pollution to the tunnel environment during the process of manual single ash cleaning, and greatly simplifying the slag discharging process.

[0034] In a specific implementation manner, the number of gas-slag separation tanks 1 is preferably at least two. During operation, some of the gas-slag separation tanks 1 can be in the slag suction mode, and the remaining gas-slag separation tanks 1 can be in the slag and ash discharge mode; and these two modes of each gas-slag separation tank 1 alternate, without interrupting the construction and slag discharging of the roadheader, and the construction efficiency is higher.

[0035] The number of ash collection tanks 2 is generally one or two.

[0036] When the number of ash collection tanks 2 is two, referring to Figure 1 and Figure 2 , the ash inlet of one of the ash collection tanks 2 is connected to the ash discharge port of the cyclone dust collector 4 through an ash inlet pipeline 21 that can be switched on and off, and the ash inlet of the other ash collection tank 2 is connected to the ash discharge port of the bag filter 5 through another ash inlet pipeline 21 that can be switched on and off; the air supply pipeline 3 is connected in parallel to both ash inlet pipelines 21 and can be switched on and off.

[0037] When the number of ash collection tanks 2 is one, referring to Figure 3 and Figure 4, the ash inlet of the ash collection tank 2 is respectively connected to the ash discharge ports of the cyclone dust collector 4 and the bag filter 5 through two ash inlet pipelines 21 in a switchable manner; and a gas supply pipeline 3 is connected in parallel to one of the ash inlet pipelines 21 in a switchable manner (generally, the gas supply pipeline 3 is connected in parallel to the ash inlet pipeline 21 connected to the cyclone dust collector 4).

[0038] The number of the specific gas-slag separation tanks 1 and the number of the ash collection tanks 2 are determined according to actual needs. The following are several preferred embodiments:

[0039] Embodiment 1

[0040] Refer to Figure 1 , the number of the ash collection tanks 2 is two, and the number of the gas-slag separation tanks 1 is two. The ash outlet of one of the ash collection tanks 2 is respectively connected to the two gas-slag separation tanks 1 through the first ash discharge pipeline 22 and the second ash discharge pipeline 23 in a switchable manner, and the ash outlet of the other ash collection tank 2 is respectively connected to the two gas-slag separation tanks 1 through the third ash discharge pipeline 24 and the fourth ash discharge pipeline 25 in a switchable manner.

[0041] Generally, the first ash discharge pipeline 22 and the third ash discharge pipeline 24 can both adopt straight pipelines arranged vertically and are respectively arranged above the two gas-slag separation tanks 1; the second ash discharge pipeline 23 and the fourth ash discharge pipeline 25 can both adopt inclined pipelines, and the second ash discharge pipeline 23 is arranged obliquely downward from the ash outlet of one of the ash collection tanks 2 to the top of the other gas-slag separation tank 1, and the fourth ash discharge pipeline 25 is arranged obliquely downward from the ash outlet of the other ash collection tank 2 to the top of one of the gas-slag separation tanks 1 to facilitate ash discharge more.

[0042] Embodiment 2

[0043] Refer to Figure 2 , the number of the ash collection tanks 2 is two, and the number of the gas-slag separation tanks 1 is one. The ash outlet of one of the ash collection tanks 2 is connected to the gas-slag separation tank 1 through the first ash discharge pipeline 22 in a switchable manner, and the ash outlet of the other ash collection tank 2 is connected to the gas-slag separation tank 1 through the fourth ash discharge pipeline 25 in a switchable manner.

[0044] Generally, the first ash discharge pipeline 22 can adopt a straight pipeline arranged vertically and is arranged above the gas-slag separation tank 1. The fourth ash discharge pipeline 25 can adopt an inclined pipeline and is arranged obliquely downward from the ash outlet of the other ash collection tank 2 to the top of the gas-slag separation tank 1 to facilitate ash discharge more.

[0045] Embodiment 3

[0046] Refer to Figure 3 , the number of the ash collection tanks 2 is one, and the number of the gas-slag separation tanks 1 is two. The ash outlet of the ash collection tank 2 is respectively connected to the two gas-slag separation tanks 1 through the first ash discharge pipeline 22 and the second ash discharge pipeline 23 in a switchable manner.

[0047] Generally, the first ash discharge pipeline 22 can be a vertically arranged straight pipeline, and is arranged above one of the gas-slag separation tanks 1. The second ash discharge pipeline 23 can be an inclined pipeline, and is arranged downwardly from the ash discharge port of the ash collecting tank 2 to the top of the other gas-slag separation tank 1, so as to facilitate ash discharge.

[0048] Example 4

[0049] Reference Figure 4 The number of the ash collecting tank 2 is one, the number of the gas-slag separation tank 1 is one, and the ash outlet of the ash collecting tank 2 is connected to the gas-slag separation tank 1 in an on-off manner through the first ash outlet pipeline 22. The first ash outlet pipeline 22 can be a vertically arranged straight pipeline and is arranged above the gas-slag separation tank 1.

[0050] Of course, the number of the gas-slag separation tanks 1 and the number of the ash collecting tanks 2 in the present application are not limited to the above embodiments, which are only for illustration.

[0051] Furthermore, in order to facilitate the control of the on and off of various places, a slag inlet electric-controlled valve 13 and an air outlet electric-controlled valve 14 are respectively provided at the inlet and outlet of the gas-slag separation tank 1, and a slag unloading door 15 that can be opened and closed is provided at the bottom slag unloading port of the gas-slag separation tank 1; a cyclone dust unloading valve 41 is provided at the ash unloading port of the cyclone dust collector 4, and a bag dust unloading valve 51 is provided at the ash unloading port of the bag dust collector 5; an air supply electric-controlled valve 31 is provided on the air supply pipeline 3, an ash unloading electric-controlled valve 26 is provided at the ash outlet of the ash collecting tank 2, and an ash inlet electric-controlled valve 16 is also provided on the top of the gas-slag separation tank 1, and the ash inlet electric-controlled valve 16 can be connected to the ash outlet of the ash collecting tank 2 through corresponding pipelines.

[0052] It can be understood that in order to ensure that the slag particles and dust temporarily stored in the ash collecting tank 2 can be more smoothly pressed into the corresponding air pressure separation tank under the action of atmospheric pressure, the pipeline between the gas-slag separation tank 1 and the ash outlet of the ash collecting tank 2 should be connected to the gas-slag separation tank 1, and the air supply pipeline 3 should be connected to the corresponding ash inlet pipeline 21, and then the pipeline between the gas-slag separation tank 1 and the ash outlet of the ash collecting tank 2 should be connected to the ash outlet of the ash collecting tank 2. That is, before opening the ash discharge electric control valve 26 at the ash outlet of the ash collecting tank 2, first open the ash inlet electric control valve 16 of the gas-slag separation tank 1, open the air supply electric control valve 31 on the air supply pipeline 3, so that the ash collecting tank 2 is connected to the atmosphere and is at atmospheric pressure; then open the ash discharge electric control valve 26 at the ash outlet of the ash collecting tank 2.

[0053] The following Figure 1 The number of ash collecting tanks 2 shown in the figure is two, and the number of gas-slag separation tanks 1 is two and they are respectively recorded as the first gas-slag separation tank and the second gas-slag separation tank ( Figure 1 Taking the first gas-slag separation tank on the left and the second gas-slag separation tank on the right as an example, the working process of the device is described in detail as follows:

[0054] Slag suction mode: At this time, the negative pressure fan 6 starts to operate. Air and slag stones enter from the bottom of the tunnel, that is, the slag inlet pipeline 11 between the two air-slag separation tanks 1. (This slag inlet pipeline 11 is connected to the slag inlet electric control valves 13 on the two air-slag separation tanks 1). This slag inlet pipeline 11 extends to the working face where the muck is generated. The air carries the slag stones and dust and enters the first air-slag separation tank through the slag inlet pipeline 11. (The two air-slag separation tanks 1 are not used simultaneously. To improve the slag discharge efficiency, while one tank is collecting slag, the other is discharging slag). The slag stones and dust are separated from the air in the first air-slag separation tank. The air will carry the unseparated fine particles and dust and continue to run along the air outlet pipeline 12, enter the cyclone dust collector 4 after passing through the air outlet pipeline 12, where primary dust removal is carried out, enter the bag filter 5 through the intermediate pipeline 42 after passing through the cyclone dust collector 4, and secondary dust removal is carried out. The clean air after dust removal is discharged through the negative pressure fan 6 after passing through the discharge pipeline 52.

[0055] During this process, the ash discharge valves at the lower parts of the cyclone dust collector 4 and the bag filter 5 operate synchronously to discharge the fine particles and dust into the two ash collection tanks 2. At this time, the two air supplement electric control valves 31, the ash discharge electric control valves 26 at the ash outlet of the two ash collection tanks 2, and the ash inlet electric control valves 16 of the two air-slag separation tanks 1 are all closed.

[0056] Slag discharge and ash discharge mode: When the amount of slag stones in the first air-slag separation tank reaches the warning value, the slag inlet of this tank stops. At this time, the slag inlet electric control valve 13 and the air outlet electric control valve 14 of the second air-slag separation tank are opened in sequence, the ash inlet electric control valve 16 of the first air-slag separation tank is opened, and the slag inlet electric control valve 13 and the air outlet electric control valve 14 of the first air-slag separation tank are closed in sequence; then the two air supplement electric control valves 31 and the ash discharge electric control valves 26 of the two ash collection tanks 2 are opened in sequence.

[0057] During the slag suction process, a negative pressure lower than the atmospheric pressure will be generated in the first air-slag separation tank and the corresponding pipelines. When the two ash discharge electric control valves 26 are opened, the slag particles and dust temporarily stored in the two ash collection tanks 2 are pressed into the first air-slag separation tank under the action of the atmospheric pressure. At this time, the pressure in the first air-slag separation tank is close to the external atmospheric pressure, and the slag discharge door 15 at its bottom can be easily opened. After the slag particles and dust in the two ash collection tanks 2 are pressed into the first air-slag separation tank, the two air supplement electric control valves 31, the two ash discharge electric control valves 26, and the ash inlet electric control valve 16 of the first air-slag separation tank 1 are closed. At this time, the next step of slag discharge operation of the first air-slag separation tank can be carried out, and the tank door at the bottom of the first air-slag separation tank is opened for slag discharge.

[0058] During the slag discharge process of the first air-slag separation tank, the second air-slag separation tank is in the slag suction mode. When the muck level in the second air-slag separation tank reaches the warning value, the slag discharge and ash discharge mode can be carried out. In this way, the two modes alternate to achieve continuous slag suction and slag discharge processes.

[0059] It should be noted that in order to ensure that the slag particles and dust temporarily stored in the ash collection tank 2 can be smoothly pressed into the first gas-slag separation tank 1, the two air supply control valves 31 need to be opened first before the two ash discharge control valves 26 are opened. At this time, the two ash collection tanks 2 are in communication with the atmosphere and are at atmospheric pressure. And before the two ash discharge control valves 26 are opened, the ash inlet control valve 16 of the first gas-slag separation tank 1 needs to be opened first. At the same time, before the ash inlet control valve 16 of the first gas-slag separation tank is opened, the air outlet control valve 14 of the first gas-slag separation tank has been closed. At this time, the pressure in the first gas-slag separation tank is maintained below atmospheric pressure (about the system pressure during slag suction).

[0060] Furthermore, in order to better ensure that the slag particles and dust in the ash collection tank 2 can be smoothly and completely pressed into the corresponding gas-slag separation tank 1, vibrators can be provided on the outer wall of the ash collection tank 2 and on each ash discharge pipeline. The vibrator can adopt any form of true hydrogen gas to prevent ash and small particles from adhering to the inner walls of the ash collection tank 2 and the corresponding ash discharge pipelines. A stirrer can also be provided in the ash collection tank 2 to prevent adhesion. The negative pressure value can also be read by collecting the pressure sensor provided in the gas-slag separation tank 1 to ensure that the difference from atmospheric pressure is not less than 5 kPa.

[0061] In summary, the dust removal and ash cleaning device of the pneumatic slag and stone conveying system in the present application adds an ash collection tank 2 for temporarily storing ash between the dust collector and the gas-slag separation tank 1, and utilizes the working principle of alternating operation of the two gas-slag separation tanks 1. Through the organic combination of control valves, the ash collection tank 2 and the corresponding pipelines and the supporting response control logic, the automatic collection and cleaning of the slag and dust separated by the cyclone dust collector 4 and the bag filter 5 are realized. The slag discharge process is simplified, automatic ash collection and ash discharge can be achieved, and one-key ash cleaning can be realized; the slag and ash cleaning personnel are liberated, the manual input is reduced, and the labor intensity is lowered; the problems of requiring special personnel to clean the slag and dust generated by the cyclone dust collector 4 and the bag filter 5 are solved, the problem of complicated slag discharge procedures is solved, and the problem of secondary pollution to the tunnel environment during the ash cleaning process is solved.

[0062] Furthermore, the present application also provides a shaft tunneling machine, including the above-mentioned dust removal and ash cleaning device of the pneumatic slag and stone conveying system.

[0063] This shaft tunneling machine is particularly suitable for a cutting-type shaft tunneling machine. Having the above-mentioned dust removal and ash cleaning device of the pneumatic slag and stone conveying system, it has the same advantages and will not be elaborated here.

[0064] The above is only a schematic specific embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A dust removal and cleaning device for a pneumatic slag conveying system, characterized in that: It comprises at least one gas-slag separation tank (1), at least one ash collecting tank (2), a cyclone dust collector (4), a bag dust collector (5) and a negative pressure fan (6); The inlet of the gas-slag separation tank (1) can be connected to the slag inlet pipeline (11) in an on-off manner, the outlet of the gas-slag separation tank (1) can be connected to the inlet of the cyclone dust collector (4) in an on-off manner, the outlet of the cyclone dust collector (4) can be connected to the inlet of the bag dust collector (5), and the outlet of the bag dust collector (5) can be connected to the negative pressure fan (6); The ash inlet of the ash collecting tank (2) can be connected to the ash discharge port of the cyclone dust collector (4) and / or the bag dust collector (5) through a corresponding ash inlet pipeline (21), and an air supply pipeline (3) can be connected to at least one of the ash inlet pipelines (21), and the air supply pipeline (3) can be connected to the outside atmosphere; the ash outlet of the ash collecting tank (2) can be connected to each of the gas-slag separation tanks (1) through a corresponding ash outlet pipeline.

2. The dust removal and cleaning device for the pneumatic slag conveying system according to claim 1, characterized in that: The number of the gas-slag separation tanks (1) is at least two.

3. The dust removal and cleaning device for the pneumatic slag conveying system according to claim 1, characterized in that: The number of the ash collecting tanks (2) is two, wherein the ash inlet of one of the ash collecting tanks (2) is connected to the ash discharge port of the cyclone dust collector (4) in an on-off manner via an ash inlet pipeline (21), and the ash inlet of the other ash collecting tank (2) is connected to the ash discharge port of the bag dust collector (5) in an on-off manner via another ash inlet pipeline (21); and both ash inlet pipelines (21) are connected to air supply pipelines (3) in an on-off manner.

4. The dust removal and cleaning device for the pneumatic slag conveying system according to claim 3 is characterized in that: The number of the gas-slag separation tanks (1) is two, wherein the ash outlet of one of the ash collecting tanks (2) is respectively connected to the two gas-slag separation tanks (1) in an on-off manner via a first ash outlet pipeline (22) and a second ash outlet pipeline (23), and the ash outlet of the other ash collecting tank (2) is respectively connected to the two gas-slag separation tanks (1) in an on-off manner via a third ash outlet pipeline (24) and a fourth ash outlet pipeline (25).

5. The dust removal and cleaning device for the pneumatic slag conveying system according to claim 3, characterized in that: The number of the gas-slag separation tank (1) is one, wherein the ash outlet of one of the ash collecting tanks (2) is connected to the gas-slag separation tank (1) in an on-off manner via a first ash outlet pipeline (22), and the ash outlet of another of the ash collecting tanks (2) is connected to the gas-slag separation tank (1) in an on-off manner via a fourth ash outlet pipeline (25).

6. The dust removal and cleaning device for the pneumatic slag conveying system according to claim 1, characterized in that: The number of the ash collecting tank (2) is one, and the ash inlet of the ash collecting tank (2) is connected to the ash discharge port of the cyclone dust collector (4) and the ash discharge port of the bag dust collector (5) through two ash inlet pipelines (21) in a switchable manner; and an air supply pipeline (3) is connected to one of the ash inlet pipelines (21) in a switchable manner.

7. The dust removal and cleaning device for the pneumatic slag conveying system according to claim 6, characterized in that: The number of the gas-slag separation tanks (1) is two, and the ash outlet of the ash collecting tank (2) is connected to the two gas-slag separation tanks (1) in an on-off manner through a first ash outlet pipeline (22) and a second ash outlet pipeline (23).

8. The dust removal and cleaning device for a pneumatic slag conveying system according to claim 6, characterized in that: The number of the gas-slag separation tank (1) is one, and the ash outlet of the ash collecting tank (2) is connected to the gas-slag separation tank (1) in an on-off manner via a first ash outlet pipeline (22).

9. The dust removal and cleaning device for a pneumatic slag conveying system according to claim 1, characterized in that: The inlet and outlet of the gas-slag separation tank (1) are respectively provided with a slag inlet electric control valve (13) and a gas outlet electric control valve (14); the bottom slag discharge port of the gas-slag separation tank (1) is provided with a slag discharge door (15) that can be opened and closed; the ash discharge port of the cyclone dust collector (4) is provided with a cyclone dust discharge valve (41); the ash discharge port of the bag dust collector (5) is provided with a bag dust discharge valve (51); An air supply electric control valve (31) is provided on the air supply pipeline (3), an ash discharge electric control valve (26) is provided at the ash outlet of the ash collecting tank (2), and an ash inlet electric control valve (16) is also provided on the top of the gas-slag separation tank (1). The ash inlet electric control valve (16) can be connected to the ash outlet of the ash collecting tank (2) through corresponding pipelines.

10. The dust removal and cleaning device for a pneumatic slag conveying system according to claim 1, characterized in that: A vibrator is provided on the outer wall of the ash collecting tank (2) and on each of the ash discharging pipelines; and / or A stirrer is arranged in the ash collecting tank (2).

11. A shaft boring machine, characterized in that: It comprises a dust removal and cleaning device for a pneumatic slag conveying system as described in any one of claims 1-10.

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