A dust-free sealing device for the discharge port of dry powder bin of intelligent pulping station for shield tunneling

Abstract

A dust-free sealing device for the discharge port of a dry powder bin of an intelligent pulping station for a shield machine comprises a frame, a dry powder bin, a powder butterfly valve, a horizontal screw conveyor, an airbag sealing assembly, and an air source device. The airbag sealing assembly is installed between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor. In this way, during operation, gas is filled into the airbag sealing ring of the airbag sealing assembly, and the airbag sealing ring closes the gap between the outer wall of the discharge port of the powder butterfly valve and the inner wall of the fixed bin, thereby playing a sealing role. The utility model of the dust-free sealing device for the discharge port of a dry powder bin of an intelligent pulping station for a shield machine can seal the gap between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor during the pulping operation after the silo is replaced, thereby solving the problem of poor sealing of the gap between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor during the pulping operation, thereby avoiding the generation of dust in the tunnel.

Description

Technical Field

[0001] The utility model relates to a dust-free sealing device for a discharge port of a dry powder bin of a pulping station, in particular to a dust-free sealing device for a discharge port of a dry powder bin of an intelligent pulping station for a shield machine. Background Art

[0002] During the construction of subway tunnels, grouting or backfilling operations will be carried out after the pipe segments are laid. At this time, a large amount of slurry preparation is required for grouting. As an important part, the intelligent slurry station plays a very important role. In order to improve work efficiency, the intelligent slurry station usually uses a replaceable dry powder silo for seamless connection operations. After replacing the silo, there will be a certain gap between the discharge port of the powder butterfly valve and the inlet of the horizontal screw conveyor (that is, the interface between the powder butterfly valve and the bottom horizontal screw conveyor) during the slurrying operation. Dust will be generated during the dry powder transportation process. Since tunnel construction is a closed environment, the generation of dust has a great impact on the environment. This device uses pressure control and silicone airbag sealing, which can effectively seal uneven surfaces, thereby optimizing the sealing effect and eliminating the generation of dust in the tunnel.

[0003] Related patent document: CN203769785U discloses a shield machine sealing device and a shield machine, which is arranged on the tail shield of the shield machine, including a sealing airbag and a supporting plate; the sealing airbag is annular as a whole and is arranged on the outer circumferential surface of the tail shield; the supporting plate is arranged on the outer circumferential surface of the tail shield and is arranged in front of the sealing airbag close to the sealing airbag to form a ring. When the sealing airbag of the shield machine sealing device is not inflated, it shrinks in the receiving groove, and the supporting plate covers the outside of the sealing airbag to protect the sealing airbag from wear. After the sealing airbag is inflated, it is filled between the tail shield and the tunnel soil to form a good seal, effectively preventing concrete and other slurries from flowing back and adhering to the shield body, causing the friction between the tail shield and the soil to increase sharply, causing great difficulties for the shield machine to move forward; at the same time, the sealing airbag can maintain a stable air pressure value between the shield body and the tunnel soil, and can support the soil to a certain extent.

[0004] The above technology does not solve the problem of poor sealing of the gap between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor during the pulping operation. Summary of the invention

[0005] The purpose of the utility model is to provide a dust-free sealing device for the discharge port of the dry powder silo of an intelligent pulping station for a shield machine. After the silo is replaced, it can seal the gap between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor during the pulping operation, thereby avoiding the generation of dust in the tunnel.

[0006] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0007] A dust-free sealing device for the discharge port of a dry powder silo of an intelligent pulping station for a shield machine comprises a frame, a dry powder silo, a powder butterfly valve and a horizontal screw conveyor. The technical solution lies in that the dust-free sealing device for the discharge port of a dry powder silo of an intelligent pulping station for a shield machine also comprises an airbag sealing assembly and an air source device for inflating the airbag sealing assembly; the airbag sealing assembly is installed between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor.

[0008] In the above technical scheme, the preferred technical scheme may be that the airbag sealing assembly preferably has a fixed bin with a cavity, a base with a cavity, an annular airbag sealing ring, and a joint extending from the fixed bin and connected to the airbag sealing ring, the fixed bin and the base are fixedly connected together (the two may be an integral structure) and the cavities (cavities) of the two are connected, and the airbag sealing ring is located in the annular groove of the inner wall of the fixed bin. The structure in which the airbag sealing assembly is installed between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor is preferably that the discharge port of the powder butterfly valve is cylindrical, the discharge port is inserted into the cavity of the fixed bin from the upper end of the fixed bin, and the discharge port is inserted into the inner hole of the airbag sealing ring, and after the airbag sealing ring is inflated, the airbag sealing ring closes the gap between the outer wall of the discharge port and the inner wall of the fixed bin; the bottom end of the base of the airbag sealing assembly is sealed and connected to the feed port of the horizontal screw conveyor through a pair of flanges (the two flanges can be sealed with a gasket). The above-mentioned gas source device preferably has a gas source triplet, a connecting air pipe, a hand-turned valve, and a precision pressure regulating valve; the gas outlet interface of the gas source triplet is connected in series with the hand-turned valve, the precision pressure regulating valve, and the connector through the connecting air pipe.

[0009] In the utility model, the dust-free sealing device for the discharge port of the dry powder bin of the intelligent pulping station for shield tunneling also has an airbag sealing assembly and an air source device for inflating the airbag sealing assembly; the airbag sealing assembly is installed between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor. In this way, when the utility model is working, the gas (entering from the gas source inlet) passes through the gas source triplet pressure reduction filtration, and then the hand-turned valve controls the air intake (or exhaust, the exhaust is used to adjust the gas pressure in the airbag sealing ring or when replacing the silo). After passing through the precision pressure regulating valve, the gas is stabilized within the controllable pressure range and filled into the airbag sealing ring of the airbag sealing assembly. After the airbag sealing ring is inflated, the outer wall of the discharge port of the powder butterfly valve and the inner wall of the fixed bin are squeezed, and the airbag sealing ring closes (blocks) the gap between the outer wall of the discharge port and the inner wall of the fixed bin, thereby playing a sealing role. That is, the utility model adopts pressure control to expand the airbag sealing ring (which can be a silicone airbag) to effectively seal the uneven surface at the gap between the outer wall of the discharge port and the inner wall of the fixed bin. Before replacing the silo, the exhaust is controlled by a hand-turned valve. After the internal gas of the airbag sealing ring is discharged, the dry powder silo can be removed for replacement. The parts to be hoisted and separated during replacement include the dry powder silo, silo hoisting ring, dry powder silo separation support legs, powder butterfly valve, etc.

[0010] To sum up, the utility model provides a dust-free sealing device for the discharge port of the dry powder silo of an intelligent pulping station for shield tunneling. After replacing the silo, it can seal the gap between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor during the pulping operation, thereby solving the problem of loose sealing of the gap between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor during the pulping operation, thereby avoiding the generation of dust in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram (stereoscopic diagram) of the utility model. Figure 1 The dotted line part is the component that can be lifted and separated.

[0012] Figure 2 It is a structural schematic diagram of the airbag sealing assembly 5 in the utility model installed between the discharge port 71 of the powder butterfly valve 7 and the feed port 61 of the horizontal screw conveyor 6.

[0013] Figure 3 It is a structural schematic diagram of the airbag sealing assembly 5 in the utility model (which can be regarded as a longitudinal section view). DETAILED DESCRIPTION

[0014] In order to make the invention purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] Example 1: Figure 1 , Figure 2 , Figure 3 As shown, the dust-free sealing device for the dry powder silo discharge port of the intelligent pulping station for shield tunneling of the utility model comprises a frame 8, a dry powder silo 9, a powder butterfly valve 7 and a horizontal screw conveyor 6, an airbag sealing assembly 5, an air source device 15 for inflating the airbag sealing assembly 5, a silo hoisting ring 10, a dry powder silo separation support leg 11, and a screw conveying reduction motor 12. The airbag sealing assembly 5 is installed between the discharge port 71 of the powder butterfly valve 7 and the feed port 61 of the horizontal screw conveyor 6.

[0016] like Figure 1 , Figure 2 , Figure 3As shown, the airbag sealing assembly 5 comprises a fixed bin 51 with a cavity, a base 52 with a cavity, an annular airbag sealing ring 50, and a joint 53 extending from the fixed bin 51 and communicating with the airbag sealing ring 50. The fixed bin 51 and the base 52 are fixedly connected together and the cavities (cavities) of the two are communicated. The fixed bin 51 and the base 52 can be an integral structure, which can be cast or processed (and then welded) from round steel. The airbag sealing ring 50 is located in the annular groove of the inner side wall of the fixed bin 51. The airbag sealing assembly 5 is installed between the discharge port 71 of the powder butterfly valve 7 and the feed port 61 of the horizontal screw conveyor 6. The discharge port 71 of the powder butterfly valve 7 is cylindrical. The discharge port 71 is inserted into the cavity of the fixed bin 51 from the upper end of the fixed bin 51, and the discharge port 71 is inserted into the inner hole of the airbag sealing ring 50. After the airbag sealing ring 50 is inflated, the airbag sealing ring 50 closes the gap between the outer wall of the discharge port 71 and the inner wall of the fixed bin 51. The bottom end of the base 52 of the airbag sealing assembly 5 is sealed and connected to the feed port 61 of the horizontal screw conveyor 6 through a pair of flanges 60 (the two flanges 60 are sealed with a gasket). The air source device 15 has an air source triplet 1, a connecting air pipe 2, a hand-turned valve 3, and a precision pressure regulating valve 4. The air outlet interface of the air source triplet 1 is connected in series with the hand-turned valve 3, the precision pressure regulating valve 4, and the connector 53 in sequence through the connecting air pipe 2.

[0017] like Figure 1 , Figure 2 , Figure 3 As shown, when the utility model is working, the gas (entering from the gas source inlet 14) passes through the gas source triplet 1 after decompression and filtration, and the air intake is controlled by the hand-turned valve 3. After the gas passes through the precision pressure regulating valve 4, the gas is stabilized within the controllable pressure range and filled into the airbag sealing ring 50 of the airbag sealing assembly 5. After the airbag sealing ring 50 is inflated, the outer wall of the discharge port of the powder butterfly valve and the inner wall of the fixed bin are squeezed, and the airbag sealing ring closes (blocks) the gap between the outer wall of the discharge port and the inner wall of the fixed bin, thereby playing a sealing role. That is, the utility model uses pressure control to expand the airbag sealing ring 50 (the airbag sealing ring 50 can be a silicone airbag), and effectively seals the uneven surface of the gap between the outer wall of the discharge port 71 and the inner wall of the fixed bin 51. When replacing the silo, the exhaust is controlled by the hand-turned valve 3. After the internal gas of the airbag sealing ring 50 is discharged, the dry powder bin can be removed for replacement. When replacing, the separated components are hoisted. Figure 1 The dotted line portion 13 is a component that can be hoisted and separated, including the dry powder silo 9, the silo hoisting ring 10, the dry powder silo separation support legs 11, the powder butterfly valve 7, etc.

[0018] To sum up, the above embodiments of the utility model provide a dust-free sealing device for the discharge port of the dry powder silo of an intelligent pulping station for shield tunneling. After replacing the silo, it can seal the gap between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor during the pulping operation, thereby solving the problem of loose sealing of the gap between the discharge port of the powder butterfly valve and the feed port of the horizontal screw conveyor during the pulping operation, thereby avoiding the generation of dust in the tunnel.

Claims

1. A dust-free sealing device for a dry powder bin discharge port of an intelligent pulping station for a shield machine, comprising a frame (8), a dry powder bin (9), a powder butterfly valve (7) and a horizontal screw conveyor (6), characterized in that The dust-free sealing device for the dry powder bin discharge port of the intelligent pulping station for shield tunneling further comprises an airbag sealing assembly (5) and an air source device (15) for inflating the airbag sealing assembly (5); The airbag sealing assembly (5) is installed between the discharge port (71) of the powder butterfly valve (7) and the feed port (61) of the horizontal screw conveyor (6).

2. The dust-free sealing device for the dry powder bin discharge port of the intelligent pulping station for shield according to claim 1 is characterized in that The airbag sealing assembly (5) comprises a fixed chamber (51) with a cavity, a base (52) with a cavity, an annular airbag sealing ring (50), and a joint (53) extending from the fixed chamber (51) and communicating with the airbag sealing ring (50); the fixed chamber (51) and the base (52) are fixedly connected together and the cavities of the two are communicated; the airbag sealing ring (50) is located in an annular groove on the inner side wall of the fixed chamber (51).

3. The dust-free sealing device for the dry powder bin discharge port of the intelligent pulping station for shield according to claim 2 is characterized in that The airbag sealing assembly (5) is installed between the discharge port (71) of the powder butterfly valve (7) and the feed port (61) of the horizontal screw conveyor (6). The discharge port (71) of the powder butterfly valve (7) is cylindrical. The discharge port (71) is inserted into the cavity of the fixed bin (51) from the upper end of the fixed bin (51), and the discharge port (71) is inserted into the inner hole of the airbag sealing ring (50). After the airbag sealing ring (50) is inflated, the airbag sealing ring (50) closes the gap between the outer wall of the discharge port (71) and the inner wall of the fixed bin (51). The bottom end of the base (52) of the airbag sealing assembly (5) is sealed and connected to the feed port (61) of the horizontal screw conveyor (6) through a pair of flanges (60).

4. The dust-free sealing device for the dry powder bin discharge port of the intelligent pulping station for shield according to claim 2 is characterized in that The gas source device (15) comprises a gas source triplet (1), a connecting gas pipe (2), a hand-operated valve (3), and a precision pressure regulating valve (4); the gas outlet interface of the gas source triplet (1) is connected in series with the hand-operated valve (3), the precision pressure regulating valve (4), and a connector (53) in sequence through the connecting gas pipe (2).

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