Segment Tail Seal Dynamic Sealing Pressure Resistance Test Equipment

Abstract

The present invention belongs to the technical field of testing equipment and relates to a dynamic sealing pressure-resistant testing equipment for a tail seal brush, which comprises a base, a support frame straddling the middle of the base, a simulated shield tail steel cylinder pivotally connected above the support frame, a conveying track horizontally passing through the hollow part in the axial direction of the simulated shield tail steel cylinder, a simulated segment and a self-sealing steel cylinder capable of moving along the conveying track. The simulated segment and the self-sealing steel cylinder are separated on both sides of the simulated shield tail steel cylinder. The outer diameters of the simulated segment and the self-sealing steel cylinder are smaller than the inner diameter of the simulated shield tail steel cylinder, and the axes of both are collinear with the axis of the simulated shield tail steel cylinder when it is horizontal. A plurality of oil receiving ring grooves for installing tail seal brushes are symmetrically arranged on the inner wall of the simulated shield tail steel cylinder in a mirror image manner. A number of pressure sensors are connected to the inside of the oil receiving ring grooves. A segment clearance adjusting device for adjusting the angle is arranged at the bottom of the simulated shield tail steel cylinder. This structure can simulate the dynamic process of a shield machine and simultaneously test the wear resistance and dynamic sealing performance of the tail seal brush.

Description

Technical Field

[0001] The present invention relates to the technical field of testing equipment, and particularly relates to a dynamic sealing pressure-resistant testing equipment for a tail seal brush. Background Art

[0002] A shield machine, full name shield tunneling machine, is a special construction machinery for tunnel excavation. Modern shield tunneling machines integrate optics, mechanics, electricity, hydraulics, sensors, and information technology, and have functions such as excavating and cutting soil and rock, transporting soil muck, assembling tunnel linings, measuring and guiding deviation correction, etc. It involves multiple disciplines such as geology, civil engineering, mechanics, hydraulics, electricity, control, and measurement, and needs to be "tailored" according to different geological conditions for design and manufacturing, with extremely high reliability requirements. Shield tunneling machines have been widely used in tunnel projects such as subways, railways, highways, municipal engineering, and hydropower.

[0003] With the development of urban construction in China, underground rail transit, cross-river tunnels and other underground projects are increasing day by day, and the shield propulsion distance of tunnels is also getting longer and longer. However, after the shield machine has been continuously propelled over a long distance, its sealing requirements during use are relatively strict. The pressure-resistant sealing performance of the tail seal brush directly affects the sealing safety during the construction process. At present, there is no unified detection standard for the pressure-resistant performance of domestic tail seal brushes, and the performance of the products cannot be judged, completely relying on experience. Often, the tail seal brush cannot meet the actual sealing pressure-resistant requirements during use. The original is a static pressure-resistant testing equipment, which cannot be presented dynamically according to the actual construction, and cannot reflect the dynamic pressure-resistant effect.

[0004] Therefore, it is necessary to develop a new model to meet the dynamic pressure-resistant testing needs of the tail seal brush. Summary of the Invention

[0005] The main purpose of the present invention is to provide a dynamic sealing pressure-resistant testing equipment for a tail seal brush, which can simulate the dynamic process of the movement of the shield machine and realize the detection of the dynamic performance of the tail seal brush.

[0006] The present invention realizes the above purpose through the following technical solutions: A dynamic sealing pressure-resistant testing equipment for a tail seal brush includes a base, a support frame straddling the middle of the base, a simulated tail steel cylinder pivotally connected above the support frame, a transfer track horizontally passing through the hollow part along the axis of the simulated tail steel cylinder, a simulated segment and a self-sealing steel cylinder that can move along the transfer track. The simulated segment and the self-sealing steel cylinder are separated on both sides of the simulated tail steel cylinder. The outer diameters of the simulated segment and the self-sealing steel cylinder are smaller than the inner diameter of the simulated tail steel cylinder and the axes of both are collinear with the axis of the simulated tail steel cylinder when it is horizontal. A plurality of oil-receiving ring grooves for installing the tail seal brush are symmetrically arranged on the inner wall of the simulated tail steel cylinder in a mirror image manner. A plurality of pressure sensors are connected to the inside of the oil-receiving ring grooves. A segment gap adjusting device for adjusting the angle is provided at the bottom of the simulated tail steel cylinder.

[0007] Specifically, grease holes are evenly distributed around the axis in the oil receiving ring groove, and an oil pipe for supplying oil to the oil receiving ring groove is provided on the outer wall of the simulated shield tail steel cylinder, and branches of the oil pipe are connected to each grease hole.

[0008] Furthermore, the pressure sensor is arranged between adjacent grease holes of the same oil ring groove.

[0009] Specifically, the simulated shield tail steel cylinder is also connected with an injection and drainage elbow, the highest point of the drainage section of the injection and drainage elbow is higher than the highest point of the simulated shield tail steel cylinder, and a drainage groove located at the outlet of the injection and drainage elbow is provided in the middle of the base.

[0010] Specifically, the segment gap adjustment device is four adjustment cylinders arranged at the bottom of the simulated shield tail steel cylinder.

[0011] Specifically, oblique-stayed swing beams are provided on both sides of the simulated shield tail steel cylinder, and the center of the oblique-stayed swing beams is rotatably connected to the top of the support frame.

[0012] Furthermore, two ends of the oblique-stayed swing beam are connected to two sides of the base through chains respectively.

[0013] Specifically, the conveying track includes a pair of racks arranged along its length direction, and the simulated pipe segment and the self-sealing steel cylinder are respectively provided with a gear driven by a motor to cooperate with the racks.

[0014] By adopting the above technical solution, the beneficial effects of the technical solution of the present invention are:

[0015] This structure can simulate the dynamic process of the shield machine and test the wear resistance and dynamic sealing of the shield tail brush at the same time, which can more comprehensively characterize the quality of the shield tail brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the shield tail brush dynamic seal pressure test equipment of the embodiment;

[0017] Figure 2 for Figure 1 A partial enlarged view of position A in the middle;

[0018] Figure 3 It is a cross-sectional view of a shield tail brush dynamic seal pressure test device according to an embodiment;

[0019] Figure 4 for Figure 3 A partial enlarged view of position B in the middle.

[0020] The numbers in the figure represent:

[0021] 1-base, 11-support frame, 12-drainage tank;

[0022] 2 - Shield tail steel cylinder simulation, 21 - Oil connection ring groove, 22 - Oil pipe, 23 - Liquid injection and drainage elbow pipe, 24 - Oblique pull swing beam;

[0023] 3 - Conveyor track, 31 - Rack;

[0024] 4a - Segment simulation, 4b - Self - sealing steel cylinder, 41 - Motor, 42 - Gear;

[0025] 5 - Segment clearance adjustment device, 51 - Adjusting oil cylinder;

[0026] 6 - Chain. Detailed implementation mode

[0027] The present invention will be further described in detail below in conjunction with specific embodiments.

[0028] Embodiment:

[0029] Such as Figure 1 And Figure 2As shown in the figure, a dynamic sealing pressure resistance test device for a tail seal brush of the present invention includes a base 1, a support frame 11 straddling the middle of the base 1, a simulated shield tail steel cylinder 2 pivotally connected above the support frame 11, a transfer track 3 horizontally passing through the hollow part along the axis of the simulated shield tail steel cylinder 2, and a simulated segment 4a and a self-sealing steel cylinder 4b that can move along the transfer track 3. The simulated segment 4a and the self-sealing steel cylinder 4b are separated on both sides of the simulated shield tail steel cylinder 2. The outer diameters of the simulated segment 4a and the self-sealing steel cylinder 4b are smaller than the inner diameter of the simulated shield tail steel cylinder 2, and the axes of both are collinear with the axis of the simulated shield tail steel cylinder 2 when it is horizontal. A plurality of oil receiving ring grooves 21 for installing the tail seal brush are symmetrically arranged on the inner wall of the simulated shield tail steel cylinder 2 in a mirror image manner. A number of pressure sensors are connected to the inside of the oil receiving ring grooves 21. A segment gap adjusting device 5 for adjusting the angle is provided at the bottom of the simulated shield tail steel cylinder 2. Before the test, the tail seal brushes are densely installed in the oil receiving ring grooves 21. The number of the oil receiving ring grooves 21 is twice that in the actual working state. Half of them are used for cooperation with the simulated segment 4a, and the other half are used for cooperation with the self-sealing steel cylinder 4b. Moreover, the bristles of the tail seal brushes cooperating with the simulated segment 4a face the self-sealing steel cylinder 4b, and the bristles of the tail seal brushes cooperating with the self-sealing steel cylinder 4b face the simulated segment 4a. In this way, the simulated segment 4a and the self-sealing steel cylinder 4b can enter the simulated shield tail steel cylinder 2 from both sides respectively. After the simulated segment 4a and the self-sealing steel cylinder 4b enter the simulated shield tail steel cylinder 2 respectively and are assembled into a whole, the oil receiving ring grooves 21 are filled with oil to fill the bristle gaps of the tail seal brushes, forming an oil seal, and a water pressure chamber for injecting water is formed in the middle, and the test starts. The forward and backward movement of the simulated segment 4a and the self-sealing steel cylinder 4b in the axial direction can simulate the friction condition of the tail seal brush. At the same time, the segment gap adjusting device 5 will adjust the angle of the simulated shield tail steel cylinder 2 to simulate the eccentric condition during the turning process of the shield machine. At this time, the pressure sensors will reflect the oil pressure at the detection points, so that it can be judged whether the tail seal brush has sufficient dynamic sealing performance under dynamic conditions of the shield machine, and the quality of the tail seal brush can be characterized more comprehensively.

[0030] As Figure 1 and Figure 2 shown in the figure, grease holes (not shown) are evenly distributed around the axis in the oil receiving ring grooves 21. An oil pipe 22 for supplying oil to the oil receiving ring grooves 21 is provided on the outer wall of the simulated shield tail steel cylinder 2. The oil pipe 22 branches out to connect each grease hole. In this way, the grease can be evenly injected into the oil receiving ring grooves 21 to avoid misjudgment caused by incomplete filling of the tail seal brushes.

[0031] The pressure sensors are arranged between adjacent grease holes in the same oil receiving ring groove 21. The oil pressure between two grease holes can reduce the influence of the oil injection pressure, so the oil pressure change caused by the gap change can be reflected more accurately.

[0032] As Figures 1 to 3As shown, a liquid injection and drainage elbow pipe 23 is also connected to the simulated shield tail steel cylinder 2. The highest point of the drainage section of the liquid injection and drainage elbow pipe 23 is higher than the highest point of the simulated shield tail steel cylinder 2. A liquid drainage groove 12 located at the outlet of the liquid injection and drainage elbow pipe 23 is provided in the middle of the base 1. Before the test, the liquid injection and drainage elbow pipe 23 will conduct water sealing on the water pressure chamber formed by the oil seal. The reason why the highest point of the drainage section is higher than the highest point of the simulated shield tail steel cylinder 2 is to ensure that the oil and water have completely filled the water pressure chamber, and the excess oil and water can also drain into the liquid drainage groove 12.

[0033] As Figure 2 and Figure 3 shown, the segment gap adjusting device 5 is four adjusting oil cylinders 51 provided at the bottom of the simulated shield tail steel cylinder 2. The four adjusting oil cylinders 51 are divided into two groups, front and back. One group rises and the other group descends, so that the attitude of the simulated shield tail steel cylinder 2 can be controlled.

[0034] As Figure 2 and Figure 3 shown, inclined pull swing beams 24 are provided on both sides of the simulated shield tail steel cylinder 2. The center of the inclined pull swing beam 24 is rotatably connected to the top end of the support frame 11. For the simulated shield tail steel cylinder 2 to be rotatably fixed to the top end of the support frame 11, the transition component needs to have a certain strength. The inclined pull swing beam 24 not only has an I-beam but also an inclined pull structure, so that the problem of out-of-control deflection caused by part deformation can be reduced.

[0035] As Figure 1 and Figure 2 shown, both ends of the inclined pull swing beam 24 are respectively connected to both sides of the base 1 through chains 6. The chains 6 have a limiting effect on the rotation angle amplitude of the inclined pull swing beam 24.

[0036] As Figure 3 and Figure 4 shown, the transfer track 3 includes a pair of racks 31 arranged along its length direction. The simulated segment 4a and the self-sealing steel cylinder 4b are each provided with a gear 42 driven by a motor 41 to cooperate with the rack 31. The motor 41 transmits the power for the axial movement of the simulated segment 4a and the self-sealing steel cylinder 4b through the cooperation of the gear 42 and the rack 31.

[0037] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A dynamic seal pressure resistance test device for a tail seal brush, characterized in that: it includes a base, a support frame straddling the middle of the base, a simulated shield tail steel cylinder pivotally connected above the support frame, a transfer track horizontally passing through the hollow part along the axis of the simulated shield tail steel cylinder, a simulated segment and a self-sealing steel cylinder that can move along the transfer track. The simulated segment and the self-sealing steel cylinder are separated on both sides of the simulated shield tail steel cylinder. The outer diameters of the simulated segment and the self-sealing steel cylinder are smaller than the inner diameter of the simulated shield tail steel cylinder, and the axes of both are collinear with the axis of the simulated shield tail steel cylinder when it is horizontal. A plurality of oil receiving ring grooves for installing tail seal brushes are symmetrically arranged on the inner wall of the simulated shield tail steel cylinder in a mirror image manner. A number of pressure sensors are connected to the inside of the oil receiving ring grooves. A segment gap adjusting device for adjusting the angle is provided at the bottom of the simulated shield tail steel cylinder. The segment gap adjusting device is four adjusting oil cylinders provided at the bottom of the simulated shield tail steel cylinder. Diagonal tension swing beams are provided on both sides of the simulated shield tail steel cylinder. The center of the diagonal tension swing beam is rotationally connected to the top end of the support frame; both ends of the diagonal tension swing beam are respectively connected to both sides of the base through chains.

2. The dynamic seal pressure resistance test device for a tail seal brush according to claim 1, characterized in that: grease holes are evenly distributed around the axis in the oil receiving ring grooves. An oil pipe for supplying oil to the oil receiving ring grooves is provided on the outer wall of the simulated shield tail steel cylinder, and the oil pipe branches out to connect each grease hole.

3. The dynamic seal pressure resistance test device for a tail seal brush according to claim 2, characterized in that: the pressure sensors are arranged between adjacent grease holes in the same oil receiving ring groove.

4. The dynamic seal pressure resistance test device for a tail seal brush according to claim 1, characterized in that: a liquid injection and drainage elbow pipe is also connected to the middle of the simulated shield tail steel cylinder. The highest point of the drainage section of the liquid injection and drainage elbow pipe is higher than the highest point of the simulated shield tail steel cylinder. A drainage groove is provided in the middle of the base at the outlet of the liquid injection and drainage elbow pipe.

5. The dynamic seal pressure resistance test device for a tail seal brush according to claim 1, characterized in that: the transfer track includes a pair of racks arranged along its length direction. The simulated segment and the self-sealing steel cylinder are each provided with a gear driven by a motor to cooperate with the rack.

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