阅读说明：本技术 适用于大坡度盾构隧道的电瓶车辅助制动设备及施工方法 (Battery car auxiliary braking equipment suitable for large-gradient shield tunnel and construction method ) 是由 王耀东 李宜房 刘国锋 沈水龙 高旻昱 张嘉轩 陈晓东 郑秀臣 布轩 马超 杨少 于 2020-07-29 设计创作，主要内容包括：本发明涉及一种适用于大坡度盾构隧道的电瓶车辅助制动设备及施工方法,包括转向装置、升降装置、限位装置和轨道装置,其中,轨道装置包括供电瓶车行驶的钢轨以及设置在钢轨内侧的齿轨,齿轨上具有间隔布置的凹槽,限位装置具有至少一个可上下运动的单向锁,单向锁包括至少一个限位块,限位块的形状、大小满足于其可卡接在所述齿轨的凹槽的要求,且限位块具有斜截面,斜截面自齿轨的凹槽内部延伸之外,限位块的另一侧竖直侧面满足于可抵触在齿轨的凹槽之中的要求从而提供反向阻力实现电瓶车的制动。本发明实现了不同坡度下电瓶车的自动化辅助制动,同时可以根据电瓶车前行方向调整限位方向,具有方便、快捷、高效的优点。(The invention relates to an auxiliary braking device of a storage battery car and a construction method thereof, which are suitable for a large-gradient shield tunnel, and the auxiliary braking device comprises a steering device, a lifting device, a limiting device and a track device, wherein the track device comprises a steel rail for driving the storage battery car and a rack arranged on the inner side of the steel rail, grooves are arranged on the rack at intervals, the limiting device is provided with at least one-way lock capable of moving up and down, the one-way lock comprises at least one limiting block, the shape and the size of the limiting block meet the requirement that the limiting block can be clamped in the grooves of the rack, the limiting block is provided with an oblique section, the oblique section extends from the inner part of the grooves of the rack, and the vertical side face of the other side of the limiting block meets the requirement that the oblique section can be abutted in. The automatic auxiliary braking device realizes automatic auxiliary braking of the battery car under different slopes, can adjust the limiting direction according to the front traveling direction of the battery car, and has the advantages of convenience, quickness and high efficiency.)

1. The utility model provides a storage battery car auxiliary brake equipment suitable for heavy grade shield tunnel which characterized in that: comprises a steering device, a lifting device, a limiting device and a track device, wherein,

the track device comprises a steel rail for the bottle car to run and a rack rail arranged on the inner side of the steel rail, and grooves are arranged on the rack rail at intervals;

the limiting device is provided with at least one-way lock capable of moving up and down, the one-way lock comprises at least one limiting block, the shape and size of the limiting block meet the requirement that the limiting block can be clamped in the groove of the rack, the limiting block is provided with an oblique section, the oblique section extends out of the groove of the rack, and the vertical side face of the other side of the limiting block meets the requirement that the limiting block can be abutted in the groove of the rack, so that reverse resistance is provided for braking the battery car;

the lifting device is connected with and controls the limiting device to control the height of the limiting block;

the steering device is connected with and controls the limiting device to adjust the direction of the limiting block.

2. The auxiliary braking device for the battery car suitable for the large-gradient shield tunnel according to claim 1, is characterized in that: the steering device is connected above the lifting device, the lower part of the lifting device is connected with the limiting device, and the steering device drives the lifting device to drive the limiting device to steer through connection.

3. The auxiliary braking device of the battery car suitable for the large-gradient shield tunnel according to claim 1 or 2, characterized in that: turn to the device including supporting connection structure, servo motor, conical gear group, rotation axis and revolving stage, wherein, supporting connection structure has workspace, servo motor conical gear group reaches the rotation axis is installed respectively in the workspace, servo motor's output with conical gear group constitutes the transmission cooperation, conical gear group with the rotation axis constitutes the transmission cooperation, the revolving stage sets up supporting connection structure's bottom, the rotation axis runs through supporting connection structure and with the revolving stage is connected fixedly, the revolving stage is connected elevating gear.

4. The auxiliary braking device for the battery car suitable for the large-gradient shield tunnel according to claim 3, characterized in that: the top of the supporting and connecting structure can be welded with the bottom of the storage battery car so that the auxiliary braking equipment of the storage battery car and the storage battery car are connected into a whole.

5. The auxiliary braking device of the battery car suitable for the large-gradient shield tunnel according to claim 1 or 2, characterized in that: the lifting device is a pneumatic lifting device, the pneumatic lifting device comprises at least one cylinder, a base of the cylinder is connected with the steering device, and a telescopic rod of the cylinder is connected with the limiting device.

6. The auxiliary braking device of the battery car suitable for the large-gradient shield tunnel according to claim 1 or 2, characterized in that: the limiting device comprises a wedge-shaped shell and a one-way lock, the wedge-shaped shell is connected with the steering device and the lifting device, and the one-way lock is installed inside the wedge-shaped shell.

7. The auxiliary braking device for the battery car suitable for the large-gradient shield tunnel according to claim 6, characterized in that: the one-way lock comprises a cylinder shell, an inner partition plate, a transmission rod, a spring and a limiting block, wherein the cylinder shell is fixedly connected with the wedge-shaped shell, the inner partition plate is arranged in the middle of the interior of the cylinder shell, the transmission rod penetrates through the inner partition plate and is located in the cylinder shell, the bottom end of the transmission rod is connected with the limiting block, and the spring is sleeved on the periphery of the transmission rod and freely contacts with the upper surface of the limiting block.

8. The auxiliary braking device for the battery car suitable for the large-gradient shield tunnel according to claim 1, is characterized in that: the steering device and the lifting device are respectively connected with a controller, and the working state of the steering device and the working state of the lifting device are controlled by the controller.

9. A construction method of the storage battery car auxiliary braking equipment suitable for the large-gradient shield tunnel, which relates to the claims 1-8, is characterized in that: the construction method comprises the following steps:

s1, calculating the service braking safety coefficient of the battery car and calculating the service braking safety coefficient lambda₁And parking braking safety factor lambda₂Determining whether auxiliary braking of the equipment is required; when if lambda₁、λ₂If any safety factor of the two does not meet the requirement of the allowable value, the auxiliary braking equipment needs to be started and the required auxiliary braking force B needs to be calculated_fAnd according to the auxiliary braking force B_fCalculating the number n of required auxiliary braking devices, otherwise, not needing to be started;

s2, when the auxiliary braking equipment needs to be started, the direction of the limiting device is adjusted by the steering device to enable the oblique section direction of the limiting block to face the driving direction of the battery car, and the height of the limiting device is adjusted by the lifting device to enable the height of the limiting block to meet the requirement of being inserted into the tooth track groove; the auxiliary braking equipment starts, the stopper is through contradicting the rack groove provides the reverse resistance and realizes storage battery car's auxiliary braking.

10. The construction method of the auxiliary braking equipment of the storage battery car suitable for the large-gradient shield tunnel according to claim 9, is characterized in that:

service braking factor of safety lambda₁The calculation comprises the following steps:

calculating the braking force required by the service braking of the battery car; calculating the maximum braking force of the battery car locomotive; calculating the service braking safety factor lambda by combining the braking force required by service braking of the battery car and the maximum braking force₁；

Parking braking factor of safety lambda₂The calculation comprises the following steps:

calculating the downward sliding force and the maximum static friction force of the battery car on the slope; calculating the parking braking safety factor lambda by combining the downward sliding force and the maximum static friction force₂。

Technical Field

The invention relates to the technical field of auxiliary braking equipment of a storage battery car, in particular to auxiliary braking equipment of the storage battery car and a construction method, wherein the auxiliary braking equipment is suitable for a large-gradient shield tunnel.

Background

At present, the construction of subways is greatly promoted in all big cities in China, and a shield method is used as an efficient and quick construction method and is widely applied to the construction of subway tunnels. A large amount of residual soil generated in the shield construction is mainly transported out of the tunnel through a storage battery car, and the storage battery car is generally formed by marshalling a locomotive, a segment car, a residual soil car and a mortar car. In the tunnel with a large gradient, especially under the condition that the storage battery car is fully loaded or the track is wet and slippery, the storage battery car is easy to slip backwards. At present, the main three ways of preventing the battery car from slipping back are: the first type is a brake system (comprising air brake and hand brake) equipped by the battery car, the air brake pushes a brake shoe through an air cylinder to limit the rotation of a wheel pair, and the hand brake enables the battery car to be in a parking brake state by rotating a brake hand wheel; the second is that the limiting devices are manually arranged on the track, and the battery car is limited between the limiting devices after the battery car stops so as to prevent the battery car from slipping back; the third kind is handled the track, for example in great highway section of slope sanding in advance with the friction between increase track and the wheel pair, and then prevent that the storage battery car from skidding on the track, reinforcing braking effect.

Through the search of the prior art documents, the patent application numbers are as follows: CN201720952039.2, publication No.: CN207141041U, patent name: the shield constructs preventing swift current car device of storage battery car, this patent establishes the rotation of structure through the drawknot structure control hook that is fixed in the storage battery car, when the storage battery car takes place the back swift current on the slope, the drawknot structure is relieved and is established the connection of structure with the hook, and the hook is established the structure and is rotated, and the couple of its tip links with the sleeper rail that corresponds colludes, and then realizes the braking of storage battery car.

Although the above patent is simple in structure, no method and specific steps for realizing accurate hooking of the hooking structure and the sleeper are provided, and in practical application, a situation that the hook cannot be hooked with the sleeper may occur, and no corresponding treatment measures are provided for abrasion and shearing damage of the hooking structure to the sleeper. Meanwhile, the hooking structure in the patent can only realize a small-range rotation in a single direction, so that the hooking structure can only realize the anti-backward-sliding function in the single direction and cannot play a role in the opposite direction.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the storage battery car auxiliary braking equipment suitable for the large-gradient shield tunnel and the construction method, so that the automatic auxiliary braking of the storage battery car under different gradients is realized, the limiting direction can be adjusted according to the front running direction of the storage battery car, and the storage battery car auxiliary braking equipment has the advantages of convenience, rapidness and high efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

an auxiliary braking device of a storage battery car suitable for a large-gradient shield tunnel comprises a steering device, a lifting device, a limiting device and a track device, wherein,

the track device comprises a steel rail for the bottle car to run and a rack rail arranged on the inner side of the steel rail, and grooves are arranged on the rack rail at intervals;

the limiting device is provided with at least one-way lock capable of moving up and down, the one-way lock comprises at least one limiting block, the shape and size of the limiting block meet the requirement that the limiting block can be clamped in the groove of the rack, the limiting block is provided with an oblique section, the oblique section extends out of the groove of the rack, and the vertical side face of the other side of the limiting block meets the requirement that the limiting block can be abutted in the groove of the rack, so that reverse resistance is provided for braking the battery car;

the lifting device is connected with and controls the limiting device to control the height of the limiting block;

the steering device is connected with and controls the limiting device to adjust the direction of the limiting block.

Preferably, the steering device is connected above the lifting device, the limiting device is connected below the lifting device, and the steering device drives the lifting device to drive the limiting device to steer through connection.

Preferably, turn to the device including supporting connection structure, servo motor, conical gear group, rotation axis and revolving stage, wherein, supporting connection structure has workspace, servo motor conical gear group reaches the rotation axis is installed respectively in the workspace, servo motor's output with conical gear group constitutes the transmission cooperation, conical gear group with the rotation axis constitutes the transmission cooperation, the revolving stage sets up supporting connection structure's bottom, the rotation axis runs through supporting connection structure and with the revolving stage is connected fixedly, the revolving stage is connected elevating gear.

More preferably, the supporting and connecting structure is formed by welding a bottom plate and four steel plates perpendicular to the bottom plate, the bottom plate provides a base support for the servo motor and the bevel gear set, and the four vertical steel plates form a semi-closed space to provide a relatively independent working space for the steering device.

More preferably, the bevel gear set is formed by meshing a vertical bevel gear and a horizontal bevel gear. All geometric parameters of the two gears are the same, and the included angle between the two gears is 90 degrees; the vertical bevel gear is fixedly connected with the motor rotating shaft, and the horizontal bevel gear is fixedly connected with the rotating shaft.

More preferably, the rotating shaft is a circular steel column, the top of the circular steel column is fixedly connected with the transverse bevel gear, the bottom of the circular steel column is fixedly connected with the rotating platform, and the rotating shaft is driven to rotate through the rotation of the bevel gear set, so that the rotating platform is driven to rotate.

More preferably, the revolving stage is a rectangle steel sheet, and steel sheet central point puts and rotation axis fixed connection, can rotate together with the rotation axis, and the bolt hole is reserved to the revolving stage bottom.

More preferably, the turntable is spaced from the bottom of the base plate supporting the connecting structure to eliminate friction applied to the turntable during rotation.

Preferably, the top of the supporting and connecting structure can be welded with the bottom of the storage battery car so that the auxiliary braking equipment of the storage battery car and the storage battery car are connected into a whole.

Preferably, the lifting device is a pneumatic lifting device, the pneumatic lifting device comprises at least one cylinder, a base of the cylinder is connected with the steering device, and a telescopic rod of the cylinder is connected with the limiting device.

More preferably, the pneumatic lifting device comprises three same equidistance three-axis cylinders, and the telescopic rod of each cylinder is stretched out and drawn back by compressing air in each cylinder, so that the lifting of the stopper is realized. The cylinder base fixing plate is connected with the reserved bolt hole at the bottom of the rotary table through a bolt, and the top of the cylinder is fixedly connected with the limiting device through a bolt.

Preferably, the limiting device comprises a wedge-shaped shell and a one-way lock, the wedge-shaped shell is connected with the steering device and the lifting device, and the one-way lock is installed inside the wedge-shaped shell.

More preferably, the limiting device consists of a wedge-shaped shell and three identical one-way locks inside the wedge-shaped shell, and the device can realize 180-degree steering and up-and-down lifting functions under the control of the steering device and the pneumatic lifting device.

More preferably, the wedge-shaped shell is formed by welding a top plate, a middle partition plate, a bottom plate, a left vertical plate, a right quarter arc curved plate, a front panel and a rear panel, and the curvature radius of the arc surface is consistent with that of the wheel. The top plate of the wedge-shaped shell is fixedly connected with the cylinder base through bolts, three circular holes with the same diameter as the unidirectional locks are reserved in the middle partition plate and the bottom plate, and the positions of the reserved circular holes correspond to the positions of the three unidirectional locks.

Preferably, the one-way lock comprises a cylinder shell, an inner partition plate, a transmission rod, a spring and a limiting block, wherein the cylinder shell is fixedly connected with the wedge-shaped shell, the inner partition plate is arranged in the middle of the interior of the cylinder shell, the transmission rod penetrates through the inner partition plate and is located in the cylinder shell, the bottom end of the transmission rod is connected with the limiting block, and the spring is sleeved on the periphery of the transmission rod and is in free contact with the upper surface of the limiting block.

More preferably, the top of the cylinder shell is fixedly connected with a top plate of the wedge-shaped shell, the cylinder shell penetrates through a reserved circular hole of a middle partition plate of the wedge-shaped shell and is fixedly welded with the middle partition plate, an inner partition plate is welded in the middle of the interior of the cylinder, and the cylinder is divided into two parts by the inner partition plate to form an upper cylinder space and a lower cylinder space.

More preferably, a hole with a diameter slightly larger than that of the transmission rod is reserved in the center of the inner partition plate, and the transmission rod is restrained to move up and down only along the hole direction.

More preferably, the transmission rod is a smooth cylinder, the top of the transmission rod is fixedly connected with a transmission cap with a diameter larger than that of the transmission rod, and the transmission cap cannot penetrate through the reserved hole of the inner partition plate, so that the transmission rod is limited to be separated from the inner partition plate and move downwards. The bottom of the transmission rod is reserved with threads which can be connected with a limiting block.

More preferably, the bottom of the transmission cap is provided with rubber so as to reduce the impact force between the transmission cap and the inner partition plate, increase the friction between the transmission cap and the inner partition plate and prevent the transmission rod from rotating.

More preferably, the limiting block is a cylinder with an oblique section, the oblique section is about 45 degrees, and one side opposite to the oblique section is of a planar structure, and the planar structure can be in planar contact with the side of the rack, so that the contact area is increased, and the reverse resistance is increased.

More preferably, the bottom of the transmission rod is connected with the top of the limiting block through threads, and the transmission rod and the limiting block form a whole and move up and down together in the cylinder shell. The threaded connection is convenient to replace the limiting block which is worn excessively.

Preferably, the steering device and the lifting device are respectively connected with a controller, and the working state of the steering device and the working state of the lifting device are controlled by the controller.

Preferably, the track device comprises a sleeper rail, a steel rail, a toothed rail, angle steel and bolts, and the device is matched with the battery car wheel pair and the limiting stopper, so that greater reverse resistance is provided for the braking process of the battery car, and the battery car can be effectively prevented from slipping backwards.

Preferably, the sleepers and the steel rails can be used for the bottle car to run in a marshalling mode.

More preferably, the sleepers are spaced apart in length in the plane of the tunnel floor.

More preferably, the steel rail is an i-section steel.

Preferably, the rack is a rectangular rack, the width of the groove is larger than the diameter of the limiting block, and the limiting block can move up and down between the teeth.

More preferably, the rack is located on the inner sides of the two rails and is fixedly connected with the sleeper rail and the rails through angle steel and bolts. The height of the tooth track is lower than that of the steel rail and is tangent to the surface of the inner side wheel of the wheel pair.

More preferably, the rack is only installed on a section with a larger gradient, and the straight section is not needed to be installed.

Preferably, the angle steel is equilateral angle steel, and two sides of the angle steel are welded and fixed with small triangular steel plates with equal thickness.

Preferably, the bolt comprises through bolt and vertical bolt, installs 4 through bolts on an angle steel, 2 vertical bolts.

More preferably, the through bolt penetrates through the angle steel and then transversely penetrates through the rack and the steel rail, and the other end of the through bolt is fixed by a nut, so that the rack is convenient to disassemble.

More preferably, the vertical bolt passes through the angle steel and then is fixedly connected with the sleeper rail.

A construction method for the auxiliary braking equipment of the storage battery car applicable to the large-gradient shield tunnel is disclosed, and is characterized in that: the construction method comprises the following steps:

s1, calculating the service braking safety coefficient of the battery car and calculating the service braking safety coefficient lambda₁And parking braking safety factor lambda₂Determining whether or not it is necessaryThe equipment assists braking; when if lambda₁、λ₂If any safety factor of the two does not meet the requirement of the allowable value, the auxiliary braking equipment needs to be started and the required auxiliary braking force B needs to be calculated_fAnd according to the auxiliary braking force B_fCalculating the number n of required auxiliary braking devices, otherwise, not needing to be started;

s2, when the auxiliary braking equipment needs to be started, the direction of the limiting device is adjusted by the steering device to enable the oblique section direction of the limiting block to face the driving direction of the battery car, and the height of the limiting device is adjusted by the lifting device to enable the height of the limiting block to meet the requirement of being inserted into the tooth track groove; the auxiliary braking equipment starts, the stopper is through contradicting the rack groove provides the reverse resistance and realizes storage battery car's auxiliary braking.

Preferably, the service braking safety factor lambda₁The calculation comprises the following steps:

calculating the braking force required by the service braking of the battery car; calculating the maximum braking force of the battery car locomotive; calculating the service braking safety factor lambda by combining the braking force required by service braking of the battery car and the maximum braking force₁；

Parking braking factor of safety lambda₂The calculation comprises the following steps:

calculating the downward sliding force and the maximum static friction force of the battery car on the slope; calculating the parking braking safety factor lambda by combining the downward sliding force and the maximum static friction force₂。

Compared with the prior art, the invention has the following beneficial effects:

the automatic auxiliary braking of the battery car under different slopes is realized, and the limiting direction can be adjusted according to the front traveling direction of the battery car, so that the automatic auxiliary braking device has the advantages of convenience, quickness and high efficiency;

can carry out not equidirectional spacing to the storage battery car conveniently, effectively at heavy grade shield construction scene, prevent that the storage battery car from taking place the back swift current, provide the safety guarantee for the transportation of section of jurisdiction, dregs in the tunnel.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a perspective view of the overall structure of a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of the overall structure of a preferred embodiment of the present invention;

FIG. 3 is an elevational view of the overall structure of a preferred embodiment of the present invention

The scores in the figure are indicated as: the device comprises a steering device 1, a pneumatic lifting device 2, a limiting device 3, a track device 4 and a battery car wheel pair 5;

the device comprises a supporting connection structure 101, a servo motor 102, a vertical bevel gear 103, a transverse bevel gear 104, a rotating shaft 105, a rotating table 106, a three-shaft cylinder 201, a cylinder telescopic rod 202, a wedge-shaped housing top plate 301, a cylinder housing 302, a middle partition plate 303, a wedge-shaped housing arc surface 304, a wedge-shaped housing bottom plate 305, a transmission rod 306, an inner partition plate 307, a spring 308, a limiting block 309, a steel rail 401, a tooth rail 402, an angle steel 403, a through bolt 404, a vertical bolt 405 and a sleeper 406.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

A tunnel in a certain section of No. 2 track traffic line in Luoyang city: the left line length is 1173.213m, the right line length is 1172.000m, the minimum buried depth of the tunnel top is about 6.5m, and the maximum buried depth is about 14.2 m. Wherein, the design of the right longitudinal slope of the line is 4 slopes, the minimum slope is 2 per thousand, and the maximum slope reaches 28.5 per thousand. The interval is constructed by adopting an earth pressure balance shield machine, two groups of battery cars are used for marshalling and transporting, each group of marshalling train is provided with one locomotive, 4 sections of 16m³Muck truck, 1 section 8m³And (5) carrying out mortar vehicle. 2-section pipe piece vehicle. Therefore, in the shield construction, the battery car driving road section has a part of road sectionThe slope is great, and weight is big when the storage battery car is fully loaded, and the ground is comparatively wet and slippery in addition, and the storage battery car easily takes place the back swift current. In order to avoid the backward sliding phenomenon, the engineering adopts the storage battery car auxiliary braking equipment suitable for the large-gradient shield tunnel to assist parking braking.

In this embodiment, a storage battery car auxiliary brake equipment suitable for heavy grade shield tunnel includes: the device comprises a steering device 1, a pneumatic lifting device 2, a limiting device 3 and a track device 4.

The steering apparatus 1 is composed of a support connection structure 101, a servo motor 102, a bevel gear set (a vertical bevel gear 103 and a horizontal bevel gear 104), a rotating shaft 105, and a rotating table 106.

The supporting and connecting structure 101 is formed by welding a steel bottom plate and four side plates perpendicular to the bottom plate. A bearing is embedded in the center of the steel bottom plate, and the rotating shaft 105 is connected with the bottom plate through the bearing. The four vertical steel plates are welded and fixed with the bottom of the vehicle body, and the supporting and connecting structure 101 provides a base support for the servo motor 102 and the bevel gear set (the vertical bevel gear 103 and the transverse bevel gear 104) and provides a relatively independent working space for the steering device 1.

In some embodiments, the steel floor is a steel plate 400mm long, 300mm wide and 15mm thick, and the side plates are steel plates 150mm high and 15mm thick.

The servo motor 102 is horizontally arranged, the base and the bottom plate are fixed through bolts and connected with a computer in the battery car control room through a lead, and the rotation of the servo motor can be controlled by the computer.

In some embodiments, the servo motor 102 may be an EDSMT-2T130-150D type servo motor.

The bevel gear set is formed by meshing a vertical bevel gear 103 and a horizontal bevel gear 104, and the included angle between the two gear shafts is 90 degrees. The vertical bevel gear 103 is fixedly connected with a rotating shaft of the servo motor 102 through an inner screw hole, and the lower step of the transverse bevel gear 104 is fixedly connected with a rotating shaft 105 through welding.

In some embodiments, vertical bevel gear 103 and transverse bevel gear 104 are each 4-die 30-tooth bevel gears with a gear diameter of 125.6mm, a tooth length of 30mm, an internal bore diameter of 20mm, a gear lower step diameter of 79mm, a height of 20mm, and a bevel gear overall height of 49 mm.

The top of the rotating shaft 105 is fixedly connected with the transverse bevel gear 103, the bottom is fixedly connected with the rotating table 106, and the rotating shaft 105 is connected with the bottom plate through a bearing preset in the center of the bottom plate of the supporting and connecting structure 101. The servo motor 102 drives the vertical bevel gear 103 to rotate, and the rotation of the bevel gear set rotates the vertical bevel gear 103, so as to drive the rotation shaft 105 to rotate, and finally drive the rotation table 106 to rotate.

In some embodiments, the rotating shaft 105 is a circular steel column with a diameter of 79mm and a height of 50 mm.

The revolving stage 106 is a rectangular steel plate, the center of the steel plate is welded and fixed with the bottom plate of the rotating shaft 105, the steel plate can rotate together with the rotating shaft 105, and a bolt hole is reserved in the bottom of the revolving stage 106. The turntable 106 is spaced from the bottom of the base plate of the support connection structure 101 to eliminate friction when the turntable rotates.

In some embodiments, the rotary table 106 is a rectangular steel plate with a length of 376mm, a width of 120mm, and a thickness of 20 mm.

The pneumatic lifting device 2 is composed of three same three-axis cylinders 201 arranged at equal intervals and a cylinder telescopic rod 202, and the telescopic rod of the cylinder is stretched by compressing air in the cylinder, so that the lifting of the stopper is realized.

The fixed plate at the top of the cylinder 201 is connected with the reserved bolt hole at the bottom of the rotating platform 106 through a bolt, and the base of the cylinder 201 is fixedly connected with the limiting device 3 through a bolt. The cylinder is controlled by a computer program of the control room.

In some embodiments, the tri-axial cylinder 201 may employ three tri-axial cylinders of the type MGPM63-100Z-M9 BM.

The cylinder telescopic rod 202 can be stretched up and down under the air pressure action of the three-axis cylinder 201, and the stretching stroke is 100 mm.

The limiting device 3 consists of a wedge-shaped shell 305 and three identical one-way locks inside the wedge-shaped shell, and can realize 180-degree steering and up-and-down lifting functions under the control of the steering device 1 and the pneumatic lifting device 2.

The wedge-shaped shell 305 is composed of a wedge-shaped shell top plate 301, a wedge-shaped shell bottom plate 305, a left vertical plate, a right wedge-shaped shell arc surface 304, a front panel and a rear panel which are welded together. In the interior of the wedge-shaped shell, a middle partition plate 303 is welded at a position away from the bottom of the top plate 301 of the wedge-shaped shell. The top plate 301 of the wedge-shaped shell is fixedly connected with the base of the triaxial cylinder 201 through bolts, three circular holes are reserved on the center lines of the middle partition plate 303 and the bottom plate 305 of the wedge-shaped shell, and the positions of the reserved circular holes correspond to the positions of the three one-way locks.

In some embodiments, wedge-shaped housing top plate 301 is 376mm long, 120mm wide, and 15mm thick; the wedge-shaped housing bottom plate 305 has a length of 526mm, a width of 120mm and a thickness of 15 mm; the width of the left vertical plate is 120mm, the height of the left vertical plate is 215mm, and the thickness of the left vertical plate is 15mm, the thickness of the right wedge-shaped shell arc surface 304 is 15mm, the radius of the right wedge-shaped shell arc surface is 150mm, and the thicknesses of the front panel and the rear panel are 15 mm. The middle spacer 303, which has a thickness of 20mm, is welded to the wedge-shaped housing at a position 65mm from the bottom of the top plate 301. The diameter of the round hole is 78mm, the circle center of the leftmost round hole is 68mm away from the surface of the left side surface of the wedge-shaped shell 305, and the distance between the adjacent round holes is 44 mm.

The one-way lock is composed of a cylinder shell 302, an inner partition 307, a transmission rod 306, a spring 308 and a limit block 309. The top of the cylinder shell 302 is fixedly welded with the top plate 301 of the wedge-shaped shell, the cylinder shell 302 penetrates through a reserved round hole of the middle partition plate 303 of the wedge-shaped shell and is fixedly welded with the middle partition plate 303, an inner partition plate 307 is welded in the middle of the interior of the cylinder shell 303, and the cylinder shell 303 is divided into two parts by the inner partition plate 307 to form an upper cylinder space and a lower cylinder space. An aperture is reserved in the center of the inner partition 307, and the transmission rod 306 passes through the aperture and moves vertically up and down under the restriction of the aperture. The top of the transmission rod 306 is fixedly connected with a transmission cap, and the bottom of the transmission rod is provided with a thread which can be connected with a limit block 309. The bottom of the transmission cap is provided with rubber to reduce the impact force between the transmission cap and the inner partition 307, and increase the friction between the transmission cap and the inner partition 307 to prevent the transmission rod 306 from rotating. The spring 308 is a cold-rolled compression spring with two ends polished flat, and is wound outside the transmission rod 306, the upper part of the spring is welded and fixed with the bottom of the inner partition 307, and the lower part of the spring is in free contact with the upper surface of the limiting block 309. The limiting block 309 is an irregular cylinder, the waist of one side of the irregular cylinder is cut off by an oblique section of 45 degrees at a certain position away from the top surface, the waist of the other side opposite to the oblique section is sunken towards the inside of the cylinder to form a wide plane structure, and the plane structure can be in contact with the side plane of the rack 402 to increase the contact area, so that the reverse resistance is increased. The center of the top of the limiting block 309 is provided with a screw hole, and the screw hole is connected with the transmission rod 306 to form a whole body, so that the limiting block and the transmission rod are lifted and lowered together in the cylinder shell 303. Threaded connection is convenient to replace the excessively worn limiting block 309.

In some embodiments, cylindrical shell 302 is 78mm in diameter and 8mm in wall thickness. The thickness of the inner partition 307 is 20mm, the inner partition 307 divides the cylindrical shell 303 into two upper and lower cylindrical spaces, the clear height of the upper cylindrical space is 65mm, and the clear height of the lower cylindrical space is 100 mm. The diameter of the hole reserved in the center of the inner partition 307 is 17 mm. The transmission rod 306 is a smooth cylinder 16mm in diameter and 100mm long; the diameter of the transmission cap is 32mm, the length of the transmission cap is 10mm, and threads with the length of 20mm are reserved at the bottom of the transmission cap. The diameter of the spring 308 is 3mm, the middle diameter of the spring is 30mm, the diameter of an inner hole is 24mm, and the free length is 80 mm. The limiting block 309 is an irregular cylinder with a diameter of 60mm and a height of 80mm, the waist part of one side of the irregular cylinder is cut off by an oblique section of 45 degrees at a position 30mm away from the top surface, and the waist part of the other side opposite to the oblique section is recessed 10mm deep into the cylinder at a position 20mm away from the top surface, so that a planar structure with a width of 45mm and a height of 60mm is formed. The diameter of the screw hole left in the center of the top of the limiting block 309 is 16 mm.

The track device 4 is composed of a sleeper rail 406, a steel rail 401, a tooth rail 402, an angle iron 403, a through bolt 404 and a vertical bolt 405.

In some embodiments, rails 406 are 1.2m long, 0.18m wide, and 0.1m high, with every 1m rail placed on the tunnel floor plane.

The steel rail 401 is an I-shaped steel section, the leg width is 0.08m, the waist height is 0.15m, and the waist thickness is 15 mm.

The rack 402 is a rectangular rack, the width of the rack is 0.12m, the height of the rack is 0.11m, grooves are arranged every 0.06m, the depth of each groove is 0.06m, and the limiting block 309 can move up and down between the teeth. The rack 402 is located on the inner side of the two rails 401, and is fixedly connected with the sleepers and the rails through angle steel 403 and bolts (404 and 405). The tooth track 402 is lower than the steel rail 401 and tangent to the surface of the inner wheel of the wheel pair. The rack 402 is only installed on the road section with larger gradient, and the straight road section does not need to be installed.

The angle steel 403 is equal-edge angle steel with the side length of 50mm and the thickness of 6mm, the width of the angle steel is 100mm, and two sides of the angle steel are welded and fixed with small triangular steel plates with equal thicknesses.

The through-bolts 404 are B-class M12 bolts and are 220mm in length. The through bolt 404 connects the steel rail 401 and the tooth rail 402, and the steel rail 401 is connected with a C-shaped channel steel at two sides to form a rectangular section with the cross section outer contour of 80mm wide and 150mm high. Two ends of the through bolt 404 are connected with the vertical surface of the angle steel 403, and 4 angles of the vertical surface are connected with the through bolt 404.

The vertical bolts 405 are class a M12 bolts, 30mm in length. Which is connected to angle iron 403 and crosstie 406 to secure rail 401 and cogged rail 402 to crosstie 406.

The construction method of the equipment comprises the following steps:

the first step is as follows: the preparation work before accomplishing storage battery car auxiliary brake equipment and using is specific:

(1) the wearing and tearing condition of stopper 309 and rack 402 is examined, and in this embodiment, the wearing and tearing volume is 0, satisfies the requirement, need not change stopper 309 or rack 402.

(2) And (3) checking the rotation function and the lifting function of the equipment, namely checking whether the control of the computer in the control room on the servo motor 102 and the triaxial cylinder 201 is normal.

(3) The computer in the control room is controlled to enable the equipment to be in a pre-working state, and the rotating device 1 is adjusted to enable the oblique section of the limiting block 309 to face the advancing direction of the battery car.

The second step is that: calculating the safety coefficient lambda of service brake₁And parking braking safety factor lambda₂And determining whether auxiliary braking of the equipment is needed. Specifically, the method comprises the following steps:

(1) determining a service braking safety factor lambda₁

i) Calculating the braking force B required by service braking

B＝(P+Q)(1100a±i·g-w·g)

Wherein, P represents the quality (T) of the electric vehicle; q represents the marshalling quality (T) of the battery car except the locomotive; a represents the running deceleration (m/s) of the battery car²) (ii) a i represents the track gradient (‰), a plus sign is taken for downhill braking, a minus sign is taken for uphill braking, and the plus sign is generally taken according to the maximum braking force, i is taken as the plus sign; w-representation electric vehicle transportThe running resistance coefficient is that w is increased by 0.015 when the mass of the locomotive is increased by 3T; g is the acceleration of gravity (N/kg).

The running deceleration a of the battery car can be calculated according to the following formula:

wherein V is the running speed (m/s) of the battery car; l is_zThe braking distance (m) of the battery car. In this example, P is 45T, Q is 170.636T at full load, V is 2.17m/s, L_z＝40m，a＝0.059m/s²I +28.5(‰), w 0.225, g 10N/kg. The service braking required braking force B is calculated to be 75442.41N.

ii) calculating the maximum braking force B of the battery car locomotive_max

B_max＝1000P_nψg

In the formula, P_nThe weight (T) of the battery car locomotive is adhered, and P is the weight of the battery car locomotive under the condition of small gradient_nThe size is consistent with that of P; psi is the adhesion coefficient, 0.17 when the track is sanded and 0.12 when it is not sanded. In this embodiment, P_nCalculated as B, 45T, 0.17 psi, 10N/kg g_max＝76500N。

iii) calculating to obtain a service braking safety coefficient lambda₁＝B_max76500/75442.41 ═ 1.01. In this embodiment, the allowable value [ lambda ] is taken₁]1.2. Due to lambda₁<[λ₁]Required auxiliary braking force B_f1＝([λ₁]-λ₁)×B＝(1.2-1.01)×75442.41＝14334N。

(2) Determining parking brake safety factor lambda₂

i) Calculating the gliding force F and the maximum static friction force F of the battery car when the battery car is stationary on the slope:

F＝1000(P+Q)g·sin(arctani)

f＝1000μ(P+Q)g·cos(arctani)

wherein mu is a static friction coefficient, and the value range of the static friction coefficient of the steel to the cast iron is 0.16-0.35. In this example, μ is 0.17, and F is 61431.32N and F is 366432.41N.

ii) calculating to obtain a parking braking safety factor lambda₂F/F366432.41/61431.32 5.96. In this embodiment, the allowable value [ lambda ] is taken₂]6.2. Due to lambda₂<[λ₂]Required parking brake force B_f2＝([λ₂]-λ₂)×F＝(6.2-5.96)×61431.32＝14743.52N。

(3) Due to lambda₁、λ₂If both do not meet the requirement of the allowable value, the auxiliary braking device needs to be started, and the required auxiliary braking force B_f＝B_f2＝14743.52N。

The third step: determining the number n of required auxiliary brake devices, specifically:

i) calculate the maximum lateral force F that the three stops 309 can withstand₁

F₁＝σ_s·s

In the formula, σ_sThe shear strength (MPa) of the material; s is the cross-sectional area (mm) of the limiting block at the top surface of the rack²). In this embodiment, the limiting block 309 is made of Q235 steel, sigma_s＝110MPa，s＝7553.07mm²Calculating to obtain F₁＝830837.7N。

ii) calculating the maximum lateral force F that the axis of rotation can withstand₂：

F₂＝σ_zs·πR²

In the formula, σ_zsThe shear strength (MPa) of the rotating shaft material; r is the radius of the rotating shaft (mm). In this embodiment, σ_zs110MPa, R39.5 mm, F is calculated₂＝538910.35N。

iii) maximum lateral force F that the triaxial cylinder can withstand₃＝2169N。

iv) braking force B that can be provided by a single device₀＝min(F₁,F₂,F₃)＝2169N。

v) calculating the number of required auxiliary devices

The fourth step: in the control room, 7 auxiliary devices are controlled by a computer to descend to the surface of the rack 402 for auxiliary braking.

The invention and the construction method thereof can assist the parking brake of the storage battery car in the shield tunnel with large gradient, prevent the storage battery car from slipping backwards, realize the automatic installation of equipment, select the limiting direction according to the running direction of the storage battery car, have the advantages of convenience, rapidness and high efficiency, and have important significance and value for the safety guarantee of tunnel construction.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.