Negative pressure prevention device for sealing main drive of heading machine

Abstract

The utility model relates to the technical field of tunnel engineering equipment, and discloses an anti-negative pressure device for a main drive seal of a heading machine, which comprises a seal detection cavity vent hole and a drive box cavity vent hole, the seal detection cavity vent hole sequentially penetrates through a compression ring, a main bearing and a drive box from a seal ring, and the drive box cavity vent hole is communicated with the seal detection cavity vent hole. The tail end of the sealing detection cavity is sequentially connected with a first connector and a first pipeline, and when the full-section hard rock tunnel boring machine stops, air in the sealing detection cavity is communicated with outside air, so that a negative pressure cavity is not formed, and abrasion of the lip seal and the abrasion-resistant ring is reduced; after the driving box cavity vent hole penetrates through the driving box body from the inner side of the driving box, the tail end of the driving box cavity vent hole is sequentially connected with a second connector and a second pipeline, and the problems of sealing failure, part deformation and the like caused by a negative pressure cavity formed due to reduction of internal air pressure are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel engineering equipment technical field, concretely is a kind of anti-negative pressure device of main drive sealing of heading machine. BACKGROUND

[0002] Full-face hard rock tunnel boring machine (hereinafter referred to as TBM) is the modernization heavy engineering equipment widely used in tunnel engineering construction at present, mainly used for rock stratum driving with certain self-stability, with the advantages of high automation, safety and environmental protection, high construction efficiency, mainly applied in highway, railway and water diversion project, main drive is the core component of TBM, main drive is located in the main part of TBM, front cutter head, external shield body, inner through belt machine, plays an important role in driving cutter head rotation to break rock and drive.

[0003] Main seal is an important component of TBM main drive, and the working environment of TBM is harsh, in order to ensure the normal work of gear and gear ring in drive box, prevent external dust and other substances from entering drive box, set main seal on the outer edge of the joint between rotating part and static part of main drive, main seal is composed of labyrinth seal and three lip seals, three lip seals form two sealing cavities, the cavity close to the inside of drive box is sealing detection cavity, and sealing detection cavity is a cavity.

[0004] The direction of two lip seals constituting sealing detection cavity is opposite, the pressure required to open lip seal from inside to outside of sealing detection cavity is smaller, and vice versa, when TBM works, lip seal and wear ring rotate relative to each other and generate heat, the air in sealing detection cavity expands when heated, when the pressure difference between inside and outside of sealing detection cavity is greater than the opening pressure of lip seal, air can be discharged automatically, when TBM stops, the air in sealing detection cavity cools down, and the air outside sealing detection cavity is difficult to pass through lip seal and enter sealing detection cavity, at this time, sealing detection cavity forms negative pressure cavity, which is easy to cause unnecessary wear of lip seal and wear ring. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of anti-negative pressure device of main drive sealing of heading machine, to solve the problem that the pressure of sealing detection cavity of prior art cannot be determined in the above background technology, sealing detection cavity forms negative pressure cavity when stopping, causing the wear of lip seal and wear ring.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] The application discloses a kind of main drive sealing of heading machine prevents negative pressure device, including drive box, main bearing and driving disc, the drive box is disc-shaped, one side is equipped with the main bearing, the cavity formed by the main bearing and the drive box is drive box cavity, the side of the main bearing away from the drive box is equipped with driving disc and compression ring, the compression ring is equipped in outer ring, and the driving disc is equipped in inner ring;The cavity between the compression ring and the driving disc is a sealing detection cavity, a sealing mechanism is provided in the sealing detection cavity, the sealing mechanism includes the first lip-shaped seal, sealing ring and second lip-shaped seal sequentially arranged on the side of the main bearing, and the device further includes sealing detection cavity air hole and drive box cavity air hole;The sealing detection cavity air hole is sequentially passed through the compression ring, the main bearing and the drive box from the sealing ring, and the tail end is sequentially connected with first connector, first pipeline;The drive box cavity air hole is sequentially connected with second connector, second pipeline from the tail end after being passed through the drive box body from the inside of the drive box.

[0008] Further, one end of the first pipeline is connected with the first connector, the other end is connected with a first filter, and a first sensor is further provided on the first pipeline.

[0009] Further, one end of the first pipeline is connected with the first connector, the other end is connected with a first filter, and a first sensor is further provided on the first pipeline.

[0010] Further, one end of the first pipeline is connected with the first connector, the other end is connected with a first filter, and a first sensor is further provided on the first pipeline.

[0011] Further, one end of the first pipeline is connected with the first connector, the other end is connected with a first filter, and a first sensor is further provided on the first pipeline.

[0012] Further, the drive box, the main bearing and the Compression ring Connected by stud bolt.

[0013] Further, the main bearing and the driving disc are connected by stud bolt.

[0014] Further, the driving disc is circumferentially provided with a wear-resistant ring.

[0015] Further, the signals of the first sensor and the second sensor are monitored in real time after being collected by PLC analog quantity acquisition module and processed by PLC, the air pressure inside the sealing detection cavity and the drive box.

[0016] Further, the main drive sealing of heading machine prevents negative pressure device is used for the main drive of full-face hard rock tunnel boring machine.

[0017] Compared with the prior art, the utility model discloses the beneficial effect is: adopt sealed detection cavity vent hole to connect sealed detection cavity and outside air at the sealing ring, when the full section hard rock tunnel boring machine stops, the air in sealed detection cavity is connected with outside air, therefore will not form the negative pressure chamber, and the abrasion of lip seal and wear ring is less;

[0018] Adopt drive box cavity vent hole to connect drive box inside and outside air, guarantee drive box cavity pressure and outside air pressure are same, reduce the problem such as sealing failure, component deformation caused by the negative pressure chamber formed by internal pressure drop because of internal pressure drop;

[0019] Adopt the signal of first sensor and second sensor through PLC analog quantity acquisition module and PLC processing, real time monitoring the air pressure in sealed detection cavity and drive box inside, and operating personnel can real time monitoring in host computer, and this centralized monitoring mode simplifies the operation process, and improves monitoring accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the partial structure schematic drawing of main drive and sealed detection cavity vent hole of the utility model;

[0021] Figure 2 It is the partial structure schematic drawing of main drive and drive box cavity vent hole of the utility model;

[0022] Figure 3 It is the rear view of main drive of the utility model;

[0023] Figure 4 It is the flow chart of monitoring the air pressure in sealed detection cavity and drive box inside of the utility model;

[0024] In the drawing: 100-drive box, 200-main bearing, 300-drive disc, 310-wear ring, 400-pressing ring, 410-first lip seal, 420-sealing ring, 430-second lip seal, 500-sealed detection cavity vent hole, 510-first joint, 520-first sensor, 530-first pipeline, 540-first filter, 550-third pipeline, 600-drive box cavity vent hole, 610-second joint, 620-second sensor, 630-second pipeline, 640-second filter, 650-fourth pipeline. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] As Figures 1-3 shown, a kind of main drive sealing of heading machine prevents negative pressure device, including drive box 100, main bearing 200 and drive disc 300, the drive box 100 is disc-shaped, one side is equipped with the main bearing 200, the cavity formed by the main bearing 200 with the drive box 100 is drive box 100 cavity, the main bearing 200 is equipped with drive disc 300 and compression ring 400 away from the side of the drive box 100, the compression ring 400 is located outer ring, the drive disc 300 is located inner ring;The cavity between the compression ring 400 and the drive disc 300 is sealing detection chamber, sealing mechanism is equipped in the sealing detection chamber, the sealing mechanism includes the first lip-shaped seal 410, sealing ring 420 and second lip-shaped seal 430 that are sequentially arranged on the side of the main bearing 200, the device also includes sealing detection chamber air hole 500 and drive box cavity air hole 600;Sealing detection chamber air hole 500 is sequentially passed through the compression ring 400, the main bearing 200 and the drive box 100 after starting from the sealing ring 420, and the tail end is sequentially connected with first connector 510, first pipeline 530;Drive box cavity air hole 600 is sequentially connected with second connector 610, second pipeline 630 after being passed through the drive box 100 box body from the inside of the drive box 100.

[0027] As Figure 1 shown, the first pipeline 530 is connected with the first connector 510 at one end, and is connected with first filter 540 at the other end, and first sensor 520 is also provided on the first pipeline 530.

[0028] As Figure 1 shown, the first filter 540 is connected with the first pipeline 530 at one end, and is connected with third pipeline 550 at the other end, and the third pipeline 550 is a bend pipe and the pipe opening is communicated with external air.

[0029] As Figure 2 shown, the second pipeline 630 is connected with the second connector 610 at one end, and is connected with second filter 640 at the other end, and second sensor 620 is also provided on the second pipeline 630.

[0030] As Figure 2 shown, the second filter 640 is connected with the second connector 610 at one end, and is connected with fourth pipeline 650 at the other end, and the fourth pipeline 650 is a bend pipe and the pipe opening is communicated with external air.

[0031] In actual operation process, the drive box 100, the main bearing 200 and the drive disc 300 are connected by stud bolt. Compression ring 400 through double-headed stud connection.

[0032] During actual operation, the main bearing 200 and the drive plate 300 are connected via studs.

[0033] like Figures 1-2 As shown, the driving disc 300 is provided with a wear-resistant ring 310 in the circumference.

[0034] During actual operation, the signals of the first sensor 520 and the second sensor 620 are processed by the PLC analog quantity acquisition module and the PLC to monitor the air pressure inside the sealing detection cavity and the driving box 100 in real time.

[0035] During actual operation, the anti-negative pressure device of the main drive seal of the tunnel boring machine is used for the main drive of the full-section hard rock tunnel boring machine.

[0036] During actual operation, when the full-section hard rock tunnel boring machine is shut down, the interior of the drive box 100 is connected to the external air pressure, the air in the sealed detection chamber is cooled, and the air pressure in the sealed detection chamber is lower than the internal air pressure of the drive box 100 (i.e., the external air pressure) to form a negative pressure chamber. At this time, the external air passes through the third pipe 550 and the first filter 540. After filtering out impurities in the first filter 540, it enters the first pipe 530 and finally enters the sealed detection chamber through the sealed detection chamber vent 500 until the internal air pressure of the sealed detection chamber is balanced with the external air pressure (i.e., the internal air pressure of the drive box 100).

[0037] During actual operation, the first sensor 520 monitors the air pressure in the sealing detection cavity in real time, and the second sensor 620 monitors the air pressure in the driving box 100 in real time.

[0038] like Figure 4 As shown, the signals of the first sensor 520 and the second sensor 620 are processed by the programmable logic controller (PLC) analog acquisition module and the programmable logic controller (PLC) and displayed in the host computer. The operator of the full-section hard rock tunnel boring machine monitors the real-time air pressure inside the sealed detection chamber and the drive box 100 in the host computer. Through program design, the host computer issues an alarm when the real-time air pressure inside the sealed detection chamber and the drive box 100 are not equal (that is, when the sealed detection chamber forms a negative pressure chamber), so that the operator of the full-section hard rock tunnel boring machine can discover and deal with it in time.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A negative pressure prevention device for the main drive seal of a tunnel boring machine, characterized by: The invention comprises a drive box, a main bearing and a drive disk, wherein the drive box is disc-shaped and has the main bearing provided on one side thereof, and the cavity formed by the main bearing and the drive box is the drive box cavity, and a drive disk and a pressure ring are provided on the side of the main bearing away from the drive box, the pressure ring is provided on the outer ring, and the drive disk is provided on the inner ring; the cavity between the pressure ring and the drive disk is a sealing detection cavity, and a sealing mechanism is provided in the sealing detection cavity, and the sealing mechanism comprises a first lip seal, a sealing ring and a second lip seal provided in sequence on one side of the main bearing, and the device further comprises a sealing detection cavity vent and a drive box cavity vent; the sealing detection cavity vent starts from the sealing ring and passes through the pressure ring, the main bearing and the drive box in sequence, and its end is connected to a first joint and a first pipe in sequence; the drive box cavity vent starts from the inner side of the drive box and passes through the drive box body, and its end is connected to a second joint and a second pipe in sequence.

2. The negative pressure prevention device for the main drive seal of a tunnel boring machine according to claim 1, characterized in that: One end of the first pipe is connected to the first connector, and the other end is connected to the first filter. The first pipe is also provided with a first sensor.

3. The negative pressure prevention device for the main drive seal of a tunnel boring machine according to claim 2, characterized in that: One end of the first filter is connected to the first pipe, and the other end is connected to the third pipe. The third pipe is a curved pipe and the pipe opening is connected to the external air.

4. The negative pressure prevention device for the main drive seal of a tunnel boring machine according to claim 3, characterized in that: One end of the second pipe is connected to the second connector, and the other end is connected to the second filter. The second pipe is also provided with a second sensor.

5. The negative pressure prevention device for the main drive seal of a tunnel boring machine according to claim 4, characterized in that: One end of the second filter is connected to the second pipe, and the other end is connected to the fourth pipe. The fourth pipe is a curved pipe and the pipe opening is connected to the external air.

6. The negative pressure prevention device for the main drive seal of a tunnel boring machine according to claim 1, characterized in that: The drive box, the main bearing and the pressure ring are connected by studs.

7. The negative pressure prevention device for the main drive seal of a roadheader according to claim 1, characterized in that: The main bearing and the drive plate are connected via studs.

8. The negative pressure prevention device for the main drive seal of a roadheader according to claim 1, characterized in that: The driving disc is provided with a wear-resistant ring in the circumference.

9. The negative pressure prevention device for the main drive seal of a roadheader according to claim 5, characterized in that: The signals of the first sensor and the second sensor are processed by the PLC analog quantity acquisition module and the PLC to monitor the air pressure inside the sealing detection cavity and the driving box in real time.

10. The negative pressure prevention device for the main drive seal of a roadheader according to any one of claims 1 to 9, characterized in that: The anti-negative pressure device for the main drive seal of a tunnel boring machine is used for the main drive of a full-face hard rock tunnel boring machine.

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