Rail grinding trolley

Abstract

The present invention discloses a rail grinding trolley, comprising: two grinding trolleys connected in an articulated manner. The grinding trolley comprises: a frame, a grinding unit, a running guide wheel, a dust collecting channel and a fireproof and dustproof device. The grinding unit is arranged inside the frame, the running guide wheel is arranged at the lower part of the frame, and the dust collecting channel is arranged at the upper part of the frame. The fireproof and dustproof device is coated on the outside of the frame except the bottom, and a semi-enclosed structure of the grinding trolley is formed by the fireproof and dustproof device and the dust collecting channel. The rail grinding trolley also comprises an elastic traction rod and a rigid traction rod, wherein one grinding trolley is connected to the vehicle body through the elastic traction rod, and the other grinding trolley is connected to the vehicle body through the rigid traction rod. The present invention can solve the technical problems of the existing rail grinding trolleys, such as limited application occasions, poor operating stability, and poor grinding quality and effect.

Description

Technical Field

[0001] The invention relates to the technical field of rail engineering machinery, and in particular to a rail grinding trolley used for railway engineering maintenance. Background Art

[0002] Rail grinding vehicles are rail engineering vehicles mainly used for track grinding. There are special turnout grinding vehicles for turnout operations, and some grinding vehicles can perform both mainline grinding and turnout grinding. However, existing rail grinding vehicles generally have many technical problems such as low operating efficiency, potential safety hazards, heavy environmental pollution, poor dust collection effect, and deviation from the operating point, which leads to unsatisfactory overall grinding performance. At present, the widely used rail grinding vehicles in China are mainly of the following types:

[0003] 1)PGM-48 grinding car. This type of grinding car is composed of three vehicles connected together, and two independent grinding cars are arranged under each vehicle. Each grinding car has four grinding units, and each unit is equipped with two grinding motors. Each unit deflects independently during grinding. The grinding car is equipped with fireproof panels and fireproof curtains around it. It is a semi-enclosed form with poor overall sealing and poor dust collection effect. This type of grinding car cannot be used for turnout grinding. At the same time, the guide wheels of the grinding car of the PGM-48 rail grinding car adopt the standard wheelset of the locomotive. A pair of wheels are connected by the same axle. The car is prone to snaking during operation, and the wheel rims are also severely worn. Moreover, the wheelset occupies a large space and has a large mass, which makes it inconvenient to disassemble and maintain. In addition, each grinding car is independently suspended, which requires more space. The two grinding motors are controlled at the same angle in the same unit, and the grinding angle combination is limited. In addition, the grinding deflection angle is relatively small and cannot be used for turnout grinding.

[0004] 2) LRG type grinding car. This type of grinding car is composed of two identical vehicles connected together, and a grinding car is arranged under each vehicle. Each grinding car has eight independently deflectable grinding motors, and each motor can independently move, lift and deflect. Four motors on one side are installed on a rectangular frame, and one side can be lifted and lowered as a whole. Fireproof panels and fireproof curtains are arranged around the grinding car, which has good sealing and dust collection effect. Although the LRG type rail grinding car is more flexible to control, it has a more complex structure due to the large number of internal movements, and has high requirements for design, processing, assembly and debugging, and the cost is relatively high. The upper end of the grinding car is closed with a hanging fireproof curtain, which has poor sealing and affects the dust collection effect. At the same time, the grinding car is located under the two grinding cars, which is not conducive to inspection and maintenance, and it is difficult to control the operation point.

[0005] 3) RR16MS-1 type turnout grinding car. This type of grinding car is composed of two identical cars connected together, and a grinding car is arranged under each car. Each grinding car has four grinding units, and each unit is arranged with two grinding motors. During grinding, each unit deflects independently, and its operating efficiency is low. The grinding car of the RR16MS-1 type turnout grinding car adopts a guide wheel with an independent wheel pair structure mode, but its structure is relatively complex, the installation requirements are high, it is not easy to maintain, and the cost is also high. The two cars are suspended separately, occupying a large space, and the two grinding motors deflect at the same angle, resulting in limited grinding angle combinations. The grinding car is connected to the grinding car by a rigid traction rod, the operating stability is poor, and there are hidden dangers in operation safety.

[0006] 4) RGH-20C subway grinding car. This type of grinding car is composed of two identical vehicles connected together, and a grinding car is arranged under each vehicle. Each grinding car has ten grinding heads driven by a hydraulic motor. The grinding car of the RGH-20C subway grinding car is a two-axle vehicle, which is difficult to pass through small radius curves. The grinding unit is suspended on the outside, and it is difficult to arrange it horizontally. At the same time, this type of vehicle is driven by hydraulics. There is a phenomenon of pipe burst and oil leakage during the use of the hydraulic grinding head, which is prone to pipe burst and oil leakage, causing serious safety accidents. There are great safety hazards, and the oil pollution seriously pollutes the environment. It has been gradually squeezed out of the market.

[0007] 5) Other types of rail grinding vehicles. Currently, there is also a solution that uses elastic traction rods at both ends of the grinding trolley. There are two ways to implement the elastic traction rod, one is through metal spring accessories, and the other is through rubber accessories. This type of pure elastic traction rod method cannot accurately locate the relative position with the grinding vehicle during the grinding operation, and the movement of the trolley is severely affected by external forces, resulting in the operating speed of the grinding trolley being in an unstable state, which greatly affects the quality and effect of the grinding operation. Summary of the invention

[0008] In view of this, the object of the present invention is to provide a rail grinding trolley to solve the technical problems of the existing subway rail grinding trolleys, such as limited application occasions, poor operating stability, and poor grinding quality and effect.

[0009] In order to achieve the above-mentioned invention purpose, the present invention specifically provides a technical implementation scheme for a rail grinding trolley, wherein the rail grinding trolley is mounted on the lower part of the body of the subway rail grinding trolley through a lifting mechanism, and includes two grinding trolleys that are hingedly connected. The grinding trolley includes: a frame, a grinding unit, a running guide wheel, a dust collection channel, and a fireproof and dustproof device. The grinding unit is arranged inside the frame, the running guide wheel is arranged at the lower part of the frame, and the dust collection channel is arranged at the upper part of the frame. The fireproof and dustproof device is coated on the outside of the frame except the bottom, and a semi-enclosed structure of the grinding trolley is formed by the fireproof and dustproof device and the dust collection channel. The rail grinding trolley also includes an elastic traction rod and a rigid traction rod, wherein one grinding trolley is connected to the body through the elastic traction rod, and the other grinding trolley is connected to the body through the rigid traction rod, and the traction of the rail grinding trolley is achieved by the elastic traction rod and the rigid traction rod.

[0010] Furthermore, the rail grinding trolley includes a first grinding trolley and a second grinding trolley. The frame of the first grinding trolley is provided with a pair of running guide wheels at the lower part of one longitudinal side. The frame of the second grinding trolley is provided with a pair of running guide wheels at the lower part of both longitudinal sides.

[0011] Furthermore, four lifting mechanisms are arranged in pairs on both sides of the longitudinal direction of the frame and connected between the lower part of the vehicle body and the frame, and the lifting mechanisms are also located on both sides of the lateral direction of the frame.

[0012] Furthermore, a derailment protection frame is provided at the lower portion of the inner side of the guide wheel mounting frame of the frame.

[0013] Furthermore, by controlling the subway rail grinding vehicle at a low constant speed, the grinding wheel of the grinding unit is at a certain angle to the rail, and the rail is ground under the action of pressure and traction perpendicular to the surface of the rail. The rail grinding vehicle also includes a deflection mechanism and a downward pressure mechanism. The deflection mechanism is arranged inside the grinding frame of the vehicle frame, and the deflection force control of the grinding unit is realized through hydraulic control. The downward pressure mechanism is arranged inside the grinding frame, and the downward pressure mechanism realizes the downward force and lifting force control of the grinding unit through hydraulic control.

[0014] Furthermore, the grinding unit further includes a grinding motor, a connecting seat on a guide post, a guide sleeve, a guide post and a grinding unit frame. One end of the deflection mechanism is connected to the grinding frame, and the other end is connected to the grinding unit frame. The grinding unit frame is hinged to the grinding frame through a deflection pin. The connecting seat on the guide post is arranged on the upper part of the grinding motor, and the grinding head of the grinding motor passes through the grinding unit frame, and at least two guide posts are connected between the connecting seat on the guide post and the grinding unit frame. The guide sleeve is fixed to the outer surface of the grinding motor and is sleeved on the guide post. One end of the pressing mechanism is connected to the connecting seat on the guide post or the grinding unit frame, and the other end is connected to the grinding motor.

[0015] Furthermore, the rail grinding trolley adopts a 4-grinding-head, 8-grinding-head, 10-grinding-head or 12-grinding-head grinding unit.

[0016] Furthermore, the grinding unit further includes a common grinding unit and a special grinding unit, and the common grinding units and the special grinding units are symmetrically arranged in pairs on both sides of the grinding frame perpendicular to the running direction of the subway rail grinding vehicle. The spacing between the special grinding units symmetrically arranged in pairs is greater than the spacing between the common grinding units symmetrically arranged in pairs.

[0017] Furthermore, the deflection angle range of the common grinding unit is from 35 degrees toward the outer side of the rail to 30 degrees toward the inner side of the rail.

[0018] Furthermore, the deflection angle range of the special grinding unit is from 0 degrees toward the inner side of the rail to 70 degrees toward the inner side of the rail.

[0019] By implementing the technical solution of the rail grinding trolley provided by the present invention, the following beneficial effects are achieved:

[0020] (1) The rail grinding trolley of the present invention can not only meet the requirements of subway mainline grinding, but also can conditionally perform turnout grinding, greatly expanding the application occasions, with good operating stability, and better grinding quality and effect;

[0021] (2) The rail grinding trolley of the present invention adopts a rigid traction rod and an elastic traction rod to jointly guide the operation of the grinding trolley, thereby reducing the space occupied by the two trolleys and shortening the overall length of the grinding trolley. The rigid traction rod can ensure the relative position stability between the whole vehicle and the grinding trolley, and the elastic traction rod can adapt to the lateral offset between the whole vehicle and the trolley on the curve.

[0022] (3) The rail grinding trolley of the present invention is connected by two grinding trolleys in an articulated manner, which can reduce the number of wheels in the middle of the two grinding trolleys, greatly reducing the demand for installation space, and is suitable for a more stringent turning radius. It is also conducive to the layout of the grinding vehicle model with multiple power drive modes;

[0023] (4) The rail grinding trolley of the present invention can independently control the posture of the grinding motor, realize the multi-position layout structure of the grinding unit, cover a large grinding angle range, and have flexible combination and clear functional division of labor. At the same time, the grinding head is relatively centralized, and the operation point control is easy to achieve, which is more conducive to the overall vehicle design and the layout of multiple power drive modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other embodiments can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic front view of the structure of a specific embodiment of the rail grinding trolley of the present invention;

[0026] Figure 2 It is a schematic side view of the structure of a specific embodiment of the rail grinding trolley of the present invention;

[0027] Figure 3 It is a schematic top view of the structure of a specific embodiment of the rail grinding trolley of the present invention;

[0028] Figure 4 yes Figure 3 A schematic diagram of the partially enlarged structure of part I;

[0029] Figure 5 yes Figure 1 Schematic diagram of the local structure;

[0030] Figure 6 It is a schematic diagram of the arrangement structure of the grinding unit of a specific embodiment of the rail grinding trolley of the present invention;

[0031] Figure 7 It is a schematic diagram of the installation structure of a specific embodiment of the rail grinding trolley of the present invention on a subway rail grinding trolley;

[0032] Figure 8 It is a schematic diagram of the arrangement structure of the dust collecting device of a specific embodiment of the rail grinding trolley of the present invention;

[0033] Fig. 9 It is a partial enlarged structural schematic diagram of a grinding unit in a specific embodiment of the rail grinding trolley of the present invention;

[0034] Fig.10 , Fig.11 It is a schematic diagram of the deflection angle of a special grinding unit in a specific embodiment of the rail grinding trolley of the present invention;

[0035] Fig.12 , Fig.13 It is a schematic diagram of the deflection angle of a common grinding unit in a specific embodiment of the rail grinding trolley of the present invention;

[0036] Fig.14 It is a partial enlarged structural schematic diagram of another specific embodiment of the rail grinding trolley of the present invention;

[0037] Fig.15 This is a front view of the layout structure of the on-track detection device of a specific embodiment of the rail grinding trolley of the present invention;

[0038] Fig.16 It is a side view of the layout structure of the on-track detection device of a specific embodiment of the rail grinding trolley of the present invention;

[0039] Fig.17 It is a side view of the layout structure of the on-track detection device of another specific embodiment of the rail grinding trolley of the present invention;

[0040] Fig.18 It is a top view of the layout structure of the off-track detection device of a specific embodiment of the rail grinding trolley of the present invention;

[0041] Fig.19 It is a top view of the layout structure of the off-track detection device of another specific embodiment of the rail grinding trolley of the present invention;

[0042] Fig. 20 It is a top view of the layout structure of the off-track detection device of the third specific embodiment of the rail grinding trolley of the present invention;

[0043] In the figure: 1-frame, 2-grinding unit, 3-travel guide wheel, 4-dust collection channel, 5-lifting mechanism, 6-elastic traction rod, 7-anti-derailment chain, 8-fire and dust prevention device, 9-derailment protection frame, 10-first grinding trolley, 11-compensator, 12-rigid traction rod, 13-articulated seat, 14-articulated head, 15-bolt, 16-spherical bearing, 17-ordinary grinding unit, 18-special grinding unit, 19-deflection mechanism, 20-second grinding trolley, 21-deflection Pin shaft, 22-carriage floor, 23-rail, 24-dust removal system, 25-downward pressure mechanism, 26-grinding motor, 27-guide column upper connecting seat, 28-guide sleeve, 29-guide column, 30-grinding unit frame, 31-grinding frame, 32-hanging rack, 33-cylinder, 34-hook, 35-hanging ear, 36-on-rail detection device, 37-off-rail detection device, 38-guide wheel mounting frame, 100-rail grinding trolley, 200-car body, 300-subway rail grinding car. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] As attached Figure 1 To Attachment Fig. 20 As shown, a specific embodiment of the rail grinding trolley of the present invention is given, and the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] Example 1

[0047] As attached Figure 7 As shown, an embodiment of a rail grinding trolley 100 is arranged at the lower part of the body 200 of the subway rail grinding trolley 300. The rail grinding trolley 100 specifically includes: a first grinding trolley 10 and a second grinding trolley 20. The first grinding trolley 10 is hingedly connected to the second grinding trolley 20. As a typical specific embodiment of the present invention, as shown in the attached Figure 4 As shown in the figure, the first grinding trolley 10 and the second grinding trolley 20 are hingedly connected by an articulated seat 13 and an articulated joint 14. The articulated seat 13 and the articulated joint 14 are connected by bolts 15, and a joint bearing 16 is arranged between the bolts 15 and the articulated joint 14. Figure 1 To Attachment Figure 3 As shown, the first grinding trolley 10 and the second grinding trolley 20 both include: a frame 1, a grinding unit 2, a running guide wheel 3, a dust collection channel 4, a lifting mechanism 5 and a fire and dust prevention device 8. The grinding unit 2 is arranged inside the frame 1, the running guide wheel 3 is arranged at the lower part of the frame 1, and the dust collection channel 4 is arranged at the upper part of the frame 1. The lifting mechanism 5 is arranged on the frame 1 along the lateral direction (as shown in the attached figure). Figure 2 On both sides of the rail grinding trolley 100 (in the direction shown in W), one end of the lifting mechanism 5 is connected to the frame 1, and the other end is connected to the lower part of the vehicle body 200. The fireproof and dustproof device 8 is coated on the outside of the frame 1 except the bottom, and a semi-enclosed structure of the first grinding trolley 10 and the second grinding trolley 20 is formed by the fireproof and dustproof device 8 and the dust collecting channel 4. The rail grinding trolley 100 also includes an elastic traction rod 6 and a rigid traction rod 12. The first grinding trolley 10 is connected to the vehicle body 200 through the elastic traction rod 6, and the second grinding trolley 20 is connected to the vehicle body 200 through the rigid traction rod 12. The traction of the rail grinding trolley 100 is achieved by the elastic traction rod 6 and the rigid traction rod 12. As another typical specific embodiment of the present invention, the first grinding trolley 10 is connected to the vehicle body 200 through the rigid traction rod 12, and the second grinding trolley 20 is connected to the vehicle body 200 through the elastic traction rod 6. The rail grinding trolley 100 described in the specific embodiment of the present invention adopts a modular structural design, which is not only very simple in structure but also beautiful and elegant in appearance, and can be well applied to rail grinding of subway track lines.

[0048] Compared with national railway lines, the limits and minimum turning radius requirements of subway lines are more stringent, so the spacing between the two bogies of subway rail grinding vehicles is small, and it is difficult to accommodate multiple grinding trolleys. Existing subway rail grinding vehicles all use two vehicles, and a grinding trolley is suspended and installed at the bottom of each vehicle, that is, two grinding trolleys are respectively suspended at the bottom of the two vehicles, which is conducive to the vehicle structure design and the vehicle layout of multi-power drive mode vehicles. In order to realize the suspension of two grinding trolleys at the bottom of the same vehicle and minimize the occupied space of the two grinding trolleys, the specific embodiment of the present invention adopts the method of articulating and hanging two grinding trolleys, so that the wheelset in the middle position of the two grinding trolleys can be reduced, and the two grinding trolleys share a set of load-bearing wheelset in the middle. After the two grinding trolleys are articulated, they are connected to the vehicle as a whole through two front and rear traction rods to be towed, one end of which is an elastic traction rod 6 and the other end is a rigid traction rod 12. The elastic traction rod 6 can change the length of the traction rod through a spring or other elastic or compressible materials. The elastic traction rod 6 is used to adapt to the lateral offset between the whole vehicle (i.e., the subway rail grinding vehicle 300) and the rail grinding trolley 100 on a curve, and the rigid traction rod 12 is used to ensure the relative position stability between the whole vehicle and the rail grinding trolley 100.

[0049] As a typical specific embodiment of the present invention, the frame 1 of the first grinding vehicle 10 is longitudinally (as shown in the attached Figure 1 and attached Figure 3 A pair of running guide wheels 3 are provided at the lower part of one side (in the direction shown in the middle). A pair of running guide wheels 3 are provided at the lower part of the frame 1 of the second grinding trolley 20 along the longitudinal direction. A pair of lifting mechanisms 5 are provided at the lower part of the frame 1 of the first grinding trolley 10 and the second grinding trolley 20 along the longitudinal direction. Figure 2 As shown, a derailment protection frame 9 is further provided at the lower part of the inner side of the guide wheel mounting frame 38 of the frame 1. By controlling the subway rail grinding vehicle 300 at a low constant speed, the grinding wheel of the grinding unit 2 forms a certain angle with the rail 23, and the rail 23 is ground under the action of pressure and traction perpendicular to the surface of the rail 23.

[0050] The rail grinding trolley 100 described in the specific embodiment of the present invention comprises a first grinding trolley 10 with two running guide wheels 3 connected to a second grinding trolley 20 with four running guide wheels 3 through a joint bearing 16, and the connected grinding trolley combination (including the first grinding trolley 10 and the second grinding trolley 20) is jointly towed by an elastic traction rod 6 and a rigid traction rod 12, which greatly reduces the demand for installation space and is also beneficial to the layout of subway rail grinding trolley models with multiple power drive modes. The rail grinding trolley 100 described in the specific embodiment of the present invention has the following advantages by concentrating two grinding trolleys under one vehicle: 1) The grinding heads of the two grinding trolleys are relatively concentrated, which is more convenient for accurate control of the landing point; 2) It is convenient for routine inspection and maintenance during operation; 3) It is convenient for the modular design of the whole vehicle, and the operating function and the power function are modularly separated. The structure of the operating function is all concentrated on one vehicle. Any subsequent vehicle that can provide power such as power can be connected to it to drive and tow the operating vehicle to perform operations; 4) The stability of the grinding trolley is greatly improved, and the possibility of the grinding trolley derailing is greatly reduced.

[0051] The rail grinding trolley 100 is divided into two working conditions: hanging and operating. The switching between the hanging and operating conditions is achieved by lifting and connecting the 6 lifting mechanisms 5 of the grinding trolley, so that the rail grinding trolley 100 moves up and down with the elastic traction rod 6 and the rigid traction rod 12 as the positioning reference. When the rail grinding trolley 100 is switched from the operating condition to the hanging condition, the first grinding trolley 10 and the second grinding trolley 20 are lifted to the hanging height by the lifting mechanism 5 with the elastic traction rod 6 and the rigid traction rod 12 as the positioning reference. Then, an anti-drop chain 7 is connected between the bottom of the vehicle body 200 and the guide wheel mounting frame 38 of the vehicle frame 1 to prevent the first grinding trolley 10 and the second grinding trolley 20 from falling off, as shown in the attached figure. Figure 5 As shown in the attached Fig.14 As shown, the bottom of the vehicle body 200 is also provided with a hanger 32, a hook 34 hinged to the hanger 32, and a cylinder 33, one end of the cylinder 33 is connected to the hanger 32, and the other end is hinged to the hook 34. When the rail grinding trolley 100 is in the hanging and transporting state, the hook 34 is hung on the hanging ear 35 of the guide wheel mounting frame 38 to further prevent the first grinding trolley 10 and the second grinding trolley 20 from falling off.

[0052] As attached Fig. 9As shown, the grinding unit 2 further includes a deflection mechanism 19, a pressing mechanism 25, a grinding motor 26, a guide post upper connection seat 27, a guide sleeve 28, a guide post 29 and a grinding unit frame 30. The deflection mechanism 19 is arranged inside the grinding frame 31 of the frame 1, and the deflection force control of the grinding unit 2 is realized by hydraulic control. One end of the deflection mechanism 19 is connected to the grinding frame 31, and the other end is connected to the grinding unit frame 30. The grinding unit frame 30 is hinged to the grinding frame 31 through the deflection pin 21. The guide post upper connection seat 27 is arranged on the upper part of the grinding motor 26, and the grinding head of the grinding motor 26 passes through the grinding unit frame 30. At least two guide posts 29 are connected between the guide post upper connection seat 27 and the grinding unit frame 30. The guide sleeve 28 is fixed to the outer surface of the grinding motor 26 and sleeved on the guide post 29. The pressing mechanism 25 is arranged inside the grinding frame 31, and the pressing mechanism 25 realizes the control of the downward force and the lifting force of the grinding unit 2 through hydraulic control. One end of the pressing mechanism 25 is connected to the connecting seat 27 on the guide column or the grinding unit frame 30, and the other end is connected to the grinding motor 26. As a preferred specific embodiment of the present invention, the lifting mechanism 5 further adopts a lifting cylinder, the deflection mechanism 19 further adopts a deflection cylinder, and the pressing mechanism 25 further adopts a pressing cylinder.

[0053] In the existing rail grinding trolley, the grinding unit adopts a structure in which two grinding motors 26 share the same grinding unit frame (i.e., deflection cradle). There are 16 grinding heads on a grinding trolley, and 8 grinding heads are used to grind one rail. Two grinding heads share the same deflection mechanism. Therefore, only 4 grinding angle combinations can be formed in one rail grinding, and the entire rail profile generally requires 10-20 angle combinations to achieve a better grinding effect. The rail grinding trolley 100 described in the specific embodiment of the present invention adopts a single grinding head grinding unit 2, and the angle selection and combination method are flexible. By setting an independent deflection mechanism for each grinding head, a grinding light band of 8 angles can be realized, which greatly improves the grinding efficiency and quality.

[0054] As attached Figure 6 As shown, the rail grinding trolley 100 can further adopt a grinding unit 2 with 4 grinding heads, 8 grinding heads, 10 grinding heads or 12 grinding heads. The grinding unit 2 further includes a common grinding unit 17 and a special grinding unit 18, which are symmetrically arranged in pairs on the grinding frame 31 along a direction perpendicular to the travel direction of the subway rail grinding trolley 300 (as shown in the attached figure). Figure 6 The spacing B between the special grinding units 18 symmetrically arranged in pairs is greater than the spacing A between the ordinary grinding units 17 symmetrically arranged in pairs. The grinding units 2 in the grinding trolley have different arrangement positions. The ordinary grinding units 17 with a left and right lateral spacing of A can perform ordinary maintenance grinding, while the special grinding units 18 with a left and right lateral spacing of B can meet the needs of large-angle grinding.

[0055] There are two types of existing rail grinding carts. One type is a grinding cart with a fixed number of rail top grinding units and a fixed number of rail side grinding units installed on it. The matching number of the two grinding units cannot be changed after processing. Among them, the difference between the rail top grinding unit and the rail side grinding unit is that the lateral distance between the two units on the two rails is different, so as to ensure that the grinding unit will not grind other facilities outside the rails after deflection. In actual use, only one of the grinding units is used most of the time, which is a great waste. The other type is a grinding cart with a grinding unit with a lateral movement function. Each unit can realize stepless switching between rail top grinding and rail side grinding at any time. However, the lateral movement mechanism of this grinding unit is more complicated, with high maintenance requirements and poor reliability.

[0056] As attached Fig.10 and attached Fig.11 As shown, the deflection angle range of the common grinding unit 17 is further from 35 degrees toward the outside of the rail 23 to 30 degrees toward the inside of the rail 23 .

[0057] As attached Fig.12 and attached Fig.13 As shown, the deflection angle range of the special grinding unit 18 is further from 0 degrees toward the inner side of the rail 23 to 70 degrees toward the inner side of the rail 23 .

[0058] Considering that different user requirements and different line conditions may require different numbers of grinding units to match, the rail grinding trolley 100 described in the specific embodiment of the present invention has two installation interfaces for two grinding units 2 at the same time on the frame 1 at each grinding unit 2. The user can install and switch the grinding unit 2 on the two interfaces as needed, so as to achieve any number of matching of the two grinding units 2, so that each grinding unit 2 is in working state, thereby greatly improving the grinding efficiency. At the same time, a combination arrangement is made for the grinding of different positions of the rails, and the functional division of the grinding unit 2 is made clearer by adjusting the lateral position of the grinding unit 2. The complex and changeable lateral movement mechanism control mode is replaced by the simplest structural combination form, which greatly reduces the failure rate and control difficulty of the grinding trolley, and can obtain a wide range of rail profile grinding effects. At the same time, conditional turnout grinding can be performed by reasonably arranging and applying the grinding units.

[0059] Example 2

[0060] As attached Figure 1 and attached Figure 7As shown, an embodiment of a subway rail grinding vehicle 300 including the rail grinding vehicle 100 described in Example 1 specifically includes: a vehicle body 200, and a rail grinding vehicle 100 disposed at the lower part of the vehicle body 200. The rail grinding vehicle 100 includes a first grinding vehicle 10 and a second grinding vehicle 20 that are hinged to each other. The rail grinding vehicle 100 also includes an elastic traction rod 6 and a rigid traction rod 12, the first grinding vehicle 10 is connected to the vehicle body 200 through the elastic traction rod 6, and the second grinding vehicle 20 is connected to the vehicle body 200 through the rigid traction rod 12. As another typical specific embodiment of the present invention, the first grinding vehicle 10 is connected to the vehicle body 200 through the rigid traction rod 12, and the second grinding vehicle 20 is connected to the vehicle body 200 through the elastic traction rod 6.

[0061] As attached Figure 8 As shown, a dust removal system 24 is further provided on the compartment floor 22 inside the body 200 of the subway rail grinding car 300, and the dust removal system 24 is connected to the dust collection channel 4 through the compensator 11. The compensator 11 is used to compensate for the required position of the grinding trolley movement, and is also the only channel for the dust removal system 24 to extract grinding dust. The grinding trolley is reasonably closed by the dust collection channel 4 and the fireproof and dustproof device 8, and is connected to the dust removal system 24 through a special compensator 11. The compensator 11 can play the role of compensating for the required position of the rail grinding trolley 100 movement, and at the same time, it is the only channel for the dust removal system 24 to extract grinding dust. The overall sealing effect is good, and the dust collection performance of the dust removal system 24 can be fully utilized. Two dust collection channels 4 are provided above the rail grinding trolley 100, and door panels and fireproof cloth structures are provided around the trolley. Except for a small gap between the fireproof cloth and the ground, other parts form a sealing structure, which can achieve more reliable sealing and dust prevention. The dustproof sealing structure of the rail grinding trolley 100 described in the specific embodiment of the present invention has the following advantages: 1) It is helpful to prevent the leakage of high-temperature grinding dust, thereby reducing pollution to the atmosphere and reducing the burning of debris on the railway side; 2) Under the exhaust action of the dust collection channel 4, a large amount of cold air enters through the gap between the fireproof cloth and the ground. The cold air can directly cool the grinding wheel, rails, grinding motor, etc., effectively preventing the overheating of the grinding motor and improving the quality of the grinding surface.

[0062] As attached Fig.15 , 16 As shown in FIG. 17 , the subway rail grinding vehicle 300 further includes an on-track detection device 36 disposed on the guide wheel mounting frame 38, and the on-track detection device 36 is simultaneously located above or behind the running guide wheel 3 in the running direction. When the running guide wheel 3 runs normally on the rail 23, the on-track detection device 36 can detect the rail 23. When the running guide wheel 3 derails, the on-track detection device 36 cannot detect the rail 23.

[0063] As attached Fig.18 As shown, the subway rail grinding vehicle 300 further includes an off-track detection device 37 disposed on the guide wheel mounting frame 38, and the off-track detection device 37 is simultaneously located on both the inner and outer sides of all the running guide wheels 3. When the running guide wheel 3 runs normally on the rail 23, the off-track detection device 37 cannot detect the rail 23. When the running guide wheel 3 derails, the off-track detection device 37 can detect the rail 23.

[0064] As attached Fig.19 As shown, the subway rail grinding vehicle 300 further includes an off-track detection device 37 disposed on the guide wheel mounting frame 38, and the off-track detection device 37 is simultaneously located on the inner side of all the running guide wheels 3. When the running guide wheels 3 run normally on the rails 23, the off-track detection device 37 cannot detect the rails 23. When the running guide wheels 3 derail, the off-track detection device 37 can detect the rails 23.

[0065] As attached Fig. 20 As shown, the subway rail grinding vehicle 300 further includes an off-track detection device 37 disposed on the guide wheel mounting frame 38, and the off-track detection device 37 is simultaneously located on the outside of all the running guide wheels 3. When the running guide wheels 3 run normally on the rails 23, the off-track detection device 37 cannot detect the rails 23. When the running guide wheels 3 derail, the off-track detection device 37 can detect the rails 23.

[0066] The subway rail grinding car 300 described in Example 2 uses a combination of on-track detection and off-track detection to improve the accuracy of the grinding car derailment detection, greatly improving the reliability of the detection. On-track detection is performed by installing a rail detection device (sensor) 36 on the front upper or rear upper part of the running guide wheel 3 of the grinding car to detect whether the rail 23 is below the running guide wheel 3. If the on-track detection device 36 loses the signal, it means that the grinding car is not on the rail 23 and has derailed, requiring emergency braking and lifting the grinding car. However, if only the on-track detection device 36 is used, false alarm signals often occur due to the limited sensing distance of the sensor, and the reliability is poor. Therefore, on the basis of the on-track detection device 36 of Example 2, an off-track detection device 37 is further added. During normal operation, the off-track detection device 37 cannot detect abnormal signals, but when the grinding car derails, the off-track detection device 37 will sense the rail 23, thereby detecting abnormal signals.

[0067] The specific embodiment of the present invention comprehensively considers the shortcomings of the existing rail grinding trolleys and proposes a new type of rail grinding trolley 100, which can not only meet the grinding requirements of the subway main line, but also can perform turnout grinding. The rail grinding trolley 100 adopts a universal running guide wheel 3, which is small in size, easy to disassemble and assemble, and has a beautiful appearance. At the same time, each grinding motor 26 corresponds to a grinding unit 2, which can be independently raised and lowered, deflected, and the posture of the grinding motor 26 can be independently controlled. The grinding angle range is large, and the grinding angle setting is flexible, which is conducive to organizing complex grinding strategies. The two grinding trolleys are connected, and an elastic traction rod 6 and a rigid traction rod 12 are used to jointly guide the operation of the grinding trolley. Not only the overall length of the rail grinding trolley 100 is shortened, which is beneficial to the design of the whole vehicle and the layout of the multi-power drive mode, but also the grinding head of the grinding motor 26 is more centralized, and the operation point control is easier to achieve. The multi-position arrangement structure of the grinding unit 2 makes the functional division of the grinding unit 2 clearer, the grinding angle covers a wider range, and the grinding function is stronger. The use of the grinding motor 26 to drive the grinding head solves the hidden dangers caused by high-pressure hydraulics during use. The rail grinding trolley 100 is overall closed, has good sealing, and has a high dust collection rate. It is suitable for grinding operations on subways, urban railways, and other lines with high environmental protection requirements.

[0068] By implementing the technical solution of the rail grinding trolley described in the specific embodiment of the present invention, the following technical effects can be produced:

[0069] (1) The rail grinding trolley described in the specific embodiment of the present invention can not only meet the requirements of subway mainline grinding, but also can conditionally perform turnout grinding, greatly expanding the application occasions, with good operating stability and better grinding quality and effect;

[0070] (2) The rail grinding trolley described in the specific embodiment of the present invention adopts a rigid traction rod and an elastic traction rod to jointly guide the operation of the grinding trolley, which compresses the space occupied by the two trolleys and shortens the overall length of the grinding trolley. The rigid traction rod can ensure the relative position stability between the whole vehicle and the grinding trolley, and the elastic traction rod can adapt to the lateral offset between the whole vehicle and the trolley on the curve;

[0071] (3) In the rail grinding trolley described in the specific embodiment of the present invention, two grinding trolleys are connected by articulation, which can reduce the number of wheels in the middle of the two grinding trolleys, greatly reducing the demand for installation space, and is suitable for a more stringent turning radius. It is also conducive to the layout of the grinding vehicle model with multiple power drive modes;

[0072] (4) The rail grinding trolley described in the specific embodiment of the present invention can independently control the posture of the grinding motor and realize a multi-position layout structure of the grinding unit. The grinding angle coverage is large, the combination is flexible, and the functional division of labor is clear. At the same time, the grinding head is relatively concentrated, and the operation point control is easy to achieve, which is more conducive to the overall vehicle design and the layout of multiple power drive modes.

[0073] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0074] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiment, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A rail grinding trolley, characterized in that: The rail grinding trolley (100) is mounted on the lower part of the vehicle body (200) of the subway rail grinding trolley (300) through a lifting mechanism (5), and comprises two grinding trolleys which are hingedly connected; the grinding trolley comprises: a vehicle frame (1), a grinding unit (2), a running guide wheel (3), a dust collection channel (4) and a fire prevention and dust prevention device (8); the grinding unit (2) is arranged inside the vehicle frame (1), the running guide wheel (3) is arranged at the lower part of the vehicle frame (1), the dust collection channel (4) is arranged at the upper part of the vehicle frame (1); the fire prevention and dust prevention device (8) The fireproof and dustproof device (8) is coated on the outside of the frame (1) except the bottom, and a semi-enclosed structure of the grinding trolley is formed by the fireproof and dustproof device (8) and the dust collecting channel (4); the rail grinding trolley (100) further comprises an elastic traction rod (6) and a rigid traction rod (12), one of the grinding trolleys is connected to the vehicle body (200) via the elastic traction rod (6), and the other grinding trolley is connected to the vehicle body (200) via the rigid traction rod (12), and the rail grinding is realized by the elastic traction rod (6) and the rigid traction rod (12). The subway rail grinding vehicle (300) further comprises an on-track detection device (36) arranged on a guide wheel mounting frame (38) of the vehicle frame (1), wherein the on-track detection device (36) is located at the front upper part or the rear upper part of the running guide wheel (3) along the running direction; when the running guide wheel (3) runs normally on the rail (23), the on-track detection device (36) can detect the rail (23); when the running guide wheel (3) derails, the on-track detection device (36) cannot detect the rail (23). The subway rail grinding vehicle (300) further comprises an off-track detection device (37) arranged on the guide wheel mounting frame (38), and the off-track detection device (37) is simultaneously located inside and / or outside of all the running guide wheels (3); when the running guide wheels (3) are running normally on the rails (23), the off-track detection device (37) cannot detect the rails (23); when the running guide wheels (3) are derailed, the off-track detection device (37) can detect the rails (23).

2. The rail grinding trolley according to claim 1, characterized in that: The rail grinding trolley (100) comprises a first grinding trolley (10) and a second grinding trolley (20); a pair of running guide wheels (3) are arranged at a lower portion of one longitudinal side of a frame (1) of the first grinding trolley (10); and a pair of running guide wheels (3) are arranged at lower portions of both longitudinal sides of a frame (1) of the second grinding trolley (20).

3. The rail grinding trolley according to claim 1 or 2, characterized in that: Four lifting mechanisms (5) are arranged in pairs on both sides of the longitudinal direction of the frame (1) and connected between the lower part of the vehicle body (200) and the frame (1). The lifting mechanisms (5) are also located on both sides of the lateral direction of the frame (1).

4. The rail grinding trolley according to claim 3, characterized in that: A derailment protection frame (9) is provided at the lower portion of the inner side of the guide wheel mounting frame (38) of the vehicle frame (1).

5. The rail grinding trolley according to claim 1, 2 or 4, characterized in that: By controlling the subway rail grinding vehicle (300) at a low constant speed, the grinding wheel of the grinding unit (2) forms a certain angle with the rail (23), and the rail (23) is ground under the action of pressure and traction perpendicular to the surface of the rail (23); the rail grinding vehicle (100) further comprises a deflection mechanism (19) and a pressing mechanism (25); the deflection mechanism (19) is arranged inside a grinding frame (31) of the vehicle frame (1), and the deflection force control of the grinding unit (2) is achieved through hydraulic control; the pressing mechanism (25) is arranged inside the grinding frame (31), and the pressing mechanism (25) achieves the control of the downward force and lifting force of the grinding unit (2) through hydraulic control.

6. The rail grinding trolley according to claim 5, characterized in that: The grinding unit (2) further comprises a grinding motor (26), a guide column upper connecting seat (27), a guide sleeve (28), a guide column (29) and a grinding unit frame (30); one end of the deflection mechanism (19) is connected to the grinding frame (31), and the other end is connected to the grinding unit frame (30); the grinding unit frame (30) and the grinding frame (31) are hingedly connected via a deflection pin (21); the guide column upper connecting seat (27) is arranged on the grinding motor (26); ), the grinding head of the grinding motor (26) passes through the grinding unit frame (30), and at least two guide pillars (29) are connected between the guide pillar upper connecting seat (27) and the grinding unit frame (30); the guide sleeve (28) is fixed to the outer surface of the grinding motor (26) and sleeved on the guide pillar (29); one end of the pressing mechanism (25) is connected to the guide pillar upper connecting seat (27) or the grinding unit frame (30), and the other end is connected to the grinding motor (26).

7. The rail grinding trolley according to claim 1, 2, 4 or 6, characterized in that: The rail grinding trolley (100) adopts a grinding unit (2) with 4 grinding heads, 8 grinding heads, 10 grinding heads or 12 grinding heads; the grinding unit (2) further comprises a common grinding unit (17) and a special grinding unit (18); the common grinding units (17) and the special grinding units (18) are symmetrically arranged in pairs on both sides of the grinding frame (31) perpendicular to the running direction of the subway rail grinding trolley (300); the spacing B between the special grinding units (18) symmetrically arranged in pairs is greater than the spacing B between the special grinding units (18) symmetrically arranged in pairs. The ordinary grinding units (17) are symmetrically arranged with a spacing A between them; the ordinary grinding units (17) with a left and right lateral spacing of A can perform ordinary maintenance grinding, and the special grinding units (18) with a left and right lateral spacing of B can meet the requirements of large-angle grinding; the deflection angle range of the ordinary grinding units (17) is 35 degrees toward the outside of the rail (23) to 30 degrees toward the inside of the rail (23); the deflection angle range of the special grinding units (18) is 0 degrees toward the inside of the rail (23) to 70 degrees toward the inside of the rail (23).

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