Rapid fine adjustment method for CRTS II type track slab

Abstract

A longitudinal fine adjustment device for a CRTS II type track board comprises a bearing seat, a thrust ball bearing, a pushing screw, a first oil hole screw, a second oil hole screw and the like. A cylindrical groove used for installing the thrust ball bearing is formed in the right side of the bearing seat. An inner hole of a shaft ring of the thrust ball bearing is in interference fit with an outer circle of a shaft ring at the left end of the pushing screw rod; the pushing nut is provided with an internal thread hole which is meshed with an external thread screw of the pushing screw, torque is applied to the pushing screw through a hexagonal prism of the pushing screw, and rotary motion of the pushing screw is converted into linear motion of the pushing nut; and the second screw hole is used for filling lubricating oil into the internal thread of the pushing nut and the external thread screw of the pushing screw meshed with the internal thread of the pushing nut. The longitudinal fine adjustment device for the track board is small, light, firm, durable and easy to operate, the formed longitudinal fine adjustment method for the track board is high in operation efficiency, normal proceeding of front and back procedures is not affected, and the aim of rapidly and accurately adjusting the longitudinal position of the CRTS II type track board in the skylight time of a high-speed railway of a business line is achieved.

Description

Technical Field

[0001] The invention relates to a rapid fine adjustment method, in particular to a CRTSⅡ type track plate rapid fine adjustment device, method and construction equipment thereof, belonging to the technical field of railway construction engineering. Background Art

[0002] CRTSⅡ type slab ballastless track is laid in large quantities in my country's high-speed railways, such as the Beijing-Shanghai High-Speed ​​Railway, Beijing-Tianjin Intercity Railway, Beijing-Shijiazhuang-Wuhan High-Speed ​​Railway, and Shanghai-Hangzhou High-Speed ​​Railway.

[0003] When laying the track slab, the three-dimensional position (vertical, horizontal and longitudinal along the line) of the track slab needs to be accurately positioned and adjusted. The CRTSⅡ track slab fast fine adjustment method described in the present invention is only for the fast fine adjustment of the longitudinal position of the CRTSⅡ track slab on the operating line high-speed railway.

[0004] When CRTSⅡ type track slabs are laid on a new railway, track slab installation points will be set on the base (supporting layer) in advance, and then positioning cones will be installed on the track slab installation points. When the track slab is laid, the longitudinal position of the track slab will be limited to a suitable position and meet the accuracy requirements due to the guiding and limiting effect of the positioning cones. After the track slab construction is completed, the positioning cones and track slab installation points will be removed.

[0005] For operating high-speed railways, since there are no positioning cones and track slab installation points that serve as guides and limits, the longitudinal position deviation of the track slab will often exceed the limit when it is laid. Therefore, it is necessary to accurately and quickly adjust the longitudinal position of the CRTSⅡ track slab within the window time of the operating high-speed railway.

[0006] See also Figure 1-3 As shown. Longitudinal adjustment technology for newly built CRTSⅡ track slabs: When CRTSⅡ track slabs are laid on new railways, track slab installation points will be set on the base (supporting layer) in advance, and then positioning cones will be installed on the track slab installation points. When the track slab is being laid, the longitudinal position of the track slab will be limited to a suitable position and meet the accuracy requirements due to the guiding and limiting effect of the positioning cones. After the construction of the track slab is completed, the positioning cones and track slab installation points will be removed. CRTSⅡ track slab horizontal and vertical position adjustment technology: The horizontal and vertical positions of CRTSⅡ track slabs are achieved using special fine-tuning claws for CRTSⅡ track slabs. Because the CRTSⅡ track slabs on newly built railway lines do not require longitudinal adjustment when laid (only the positioning cones meet the requirements), the special fine-tuning claws for CRTSⅡ track slabs do not consider the longitudinal adjustment function.

[0007] Existing technologies, such as the patent: CN201873910U, discloses a CRTSⅡ type ballastless track slab laying single degree of freedom with gravity compensation fine-tuning claw, CN201865013U discloses a ballastless track slab three-degree-of-freedom fine-tuning claw, CN201942962U: ballastless track slab three-degree-of-freedom gravity compensation fine-tuning claw, CN201981453U: ballastless track slab three-degree-of-freedom compensation fine-tuning claw, CN201981454U: ballastless track slab single freedom : CN201981455U: Double-degree-of-freedom gravity-compensated fine-tuning claw, CN210737244U: A ballastless track slab laying fine-tuning claw, CN215164215U: A ballastless track slab compensation fine-tuning claw, CN308239545S: Fine-tuning claw (low-torque three-axis coplanar), CN308239546S: Fine-tuning claw (low-torque transmission three-axis coplanar), plate-type ballastless track three-axis co-directional fine-tuning claw and supporting auxiliary devices. In the above-mentioned prior art, the ballastless track slab includes CRTSⅠ type slab, CRTSⅡ type slab and CRTSⅢ type slab. Among them, the longitudinal fine-tuning technology of CRTSⅠ type slab and CRTSⅢ type slab is basically the same, and both are realized by three-dimensional (horizontal, horizontal and longitudinal) fine-tuning claws. However, the three-dimensional fine-adjustment claws of CRTSⅠ and CRTSⅢ track plates need to be installed with the help of the lifting sleeves reserved on the side of the track plates, and there are no reserved lifting sleeves available for CRTSⅡ track plates; and the longitudinal stroke of the three-dimensional fine-adjustment claws of CRTSⅠ and CRTSⅢ track plates is only about 20mm, which is not enough for the longitudinal adjustment of the track plates on the operating lines (at least 50mm is required).

[0008] Therefore, there are three closest technologies mentioned above, namely, the newly built CRTSⅡ type track plate longitudinal adjustment technology, the CRTSⅡ type track plate horizontal and vertical position adjustment technology, and the longitudinal position adjustment technology of other types of track plates. None of them can solve the problem of quickly and accurately adjusting the longitudinal position of the CRTSⅡ type track plate within the window time of the operating line high-speed railway, and the adjustment amount must be no less than 50mm. Summary of the invention

[0009] In order to solve the defects existing in the prior art, the present invention discloses a CRTSⅡ type track plate longitudinal fine adjustment device, and its technical solution is as follows:

[0010] A CRTSⅡ type track plate longitudinal fine adjustment device comprises a bearing seat 21, a thrust ball bearing 22, a thrust screw 23, a bearing cover 24, a bearing cover screw 25, a thrust nut 26, a first oil hole screw 27, and a second oil hole screw 28, and is characterized by:

[0011] The right side of the bearing seat 21 is provided with a cylindrical groove for mounting a thrust ball bearing 22; the race of the thrust ball bearing 22 and the cylindrical groove of the bearing seat 21 are interference fit to form a whole; the top of the bearing seat 21 is provided with a first screw hole for mounting a first oil hole screw 27;

[0012] The inner hole of the shaft ring of the thrust ball bearing 22 is interference fit with the outer circle of the shaft ring at the left end of the push screw 23;

[0013] The bearing cover 24 is fixed on the bearing seat 21 by the bearing cover screws 25;

[0014] The push nut 26 is provided with a longitudinal internal threaded hole meshing with the external threaded screw of the push screw. By applying torque to the push screw through the hexagonal prism of the push screw, the rotational motion of the push screw 23 can be converted into the linear motion of the push nut 26.

[0015] A second screw hole with a second oil hole screw 28 installed is formed at the top of the push nut 26, and lubricating oil is added to the internal thread of the push nut 26 and the external thread of the push screw 23 meshing therewith through the second screw hole.

[0016] The present invention also discloses a method for longitudinal fine adjustment of a CRTSⅡ type track plate, which is characterized by:

[0017] Step 1: Install the track plate longitudinal fine adjustment device;

[0018] Step 2: Adjust the longitudinal position of the track plate.

[0019] The present invention also discloses a high-speed railway CRTSⅡ type slab ballastless track construction equipment, which is characterized by comprising a CRTSⅡ type track slab rapid fine-tuning device adopting the above-mentioned CRTSⅡ type track slab longitudinal fine-tuning method.

[0020] Beneficial Effects

[0021] (1) The present invention combines the working condition that the adjacent track plates are in an unseparated state during the fine adjustment of the CRTSⅡ track plates during the skylight time of the operating line high-speed railway and the special structural characteristics of the wide joints at the ends of the CRTSⅡ track plates, designs a track plate longitudinal fine adjustment device that matches the working condition and the track plate structure, and forms a CRTSⅡ track plate longitudinal fine adjustment method.

[0022] (2) The longitudinal fine-tuning method of the CRTSⅡ type track slab of the present invention adopts a track slab longitudinal fine-tuning device which is compact and lightweight, strong and durable, and easy to operate. The resulting track slab longitudinal fine-tuning method has high operating efficiency and does not affect the normal progress of the previous and subsequent processes (removing the existing filling layer, sealing the edges and pouring the new filling layer), thereby achieving the goal of quickly and accurately adjusting the longitudinal position of the CRTSⅡ type track slab during the window time of the operating line high-speed railway. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the assembly of the track plate longitudinal fine adjustment device of the present invention;

[0024] Figure 2 This is an exploded view of the track plate longitudinal fine adjustment device of the present invention;

[0025] Figure 3 It is a schematic diagram of the end face of the track plate longitudinal fine adjustment device of the present invention;

[0026] Figure 4 This is a schematic diagram of the installation of the CRTSⅡ type track plate longitudinal fine adjustment device of the present invention;

[0027] In the figure: 1. fixed track plate; 2. track plate longitudinal fine-tuning device; 3. track plate to be fine-tuned; 21. bearing seat; 22. thrust ball bearing; 23. push screw; 24. bearing cover; 25. bearing cover screw; 26. push nut; 27. first oil hole screw; 28. second oil hole screw. DETAILED DESCRIPTION

[0028] See also Figure 1-4 The present invention discloses a CRTSⅡ type track plate longitudinal fine adjustment device, which is the most critical tool in the CRTSⅡ type track plate longitudinal fast fine adjustment method, and comprises a bearing seat 21, a thrust ball bearing 22, a push screw 23, a bearing cover 24, a bearing cover screw 25, a push nut 26, a first oil hole screw 27, and a second oil hole screw 28.

[0029] The left vertical surface of the bearing seat 21 contacts the side surface of the plate end of the fixed track plate 1 and transmits the top thrust; there is a flange plate on the upper left side of the bearing seat 21, which is used to clamp on the top surface of the plate end of the fixed track plate 1 to limit its downward displacement; there is a cylindrical groove on the right side of the bearing seat 21 for installing the thrust ball bearing 22; on the right side of the bearing seat 21, 4 screw holes are evenly distributed on the outer edge of the cylindrical groove for installing the bearing cover; a first screw hole is provided on the top of the bearing seat 21, and the first screw hole is connected with the cylindrical groove. The first screw hole is used to install the first oil hole screw 27. When the oil hole screw 27 is removed, lubricating oil can be added to the thrust ball bearing 22 installed in the cylindrical groove through the first screw hole.

[0030] The left end of the push screw 23 is provided with a shaft collar, the right side of the shaft collar is a thrust surface, and the middle part of the push screw 23 is provided with a hexagonal prism for a wrench to apply torque; the right end of the push screw 23 is an external threaded screw;

[0031] The seat ring of the thrust ball bearing 22 is interference fit with the cylindrical groove of the bearing seat 21 to form a whole. The inner hole of the shaft ring of the thrust ball bearing 22 is interference fit with the outer circle of the shaft ring at the left end of the push screw 23. The thrust surface on the right side of the shaft ring fits with the end face of the shaft ring of the thrust ball bearing 22. The shaft ring of the thrust ball bearing 22 is fixed to the push screw as a whole and can rotate around the central axis; the thrust ball bearing transmits the thrust force from the push screw 23 and provides the push screw 23 with the smallest possible rotational friction; after the overall processing of the bearing cover is completed, it is cut into two symmetrical pieces from the middle for easy assembly. The bearing cover is fixed to the bearing seat 21 by 4 bearing cover screws 25, which are used to longitudinally limit the thrust ball bearing 22 and the push screw 23 on the bearing seat 21. At this time, the bearing seat, thrust ball bearing, push screw and bearing cover are combined into a whole.

[0032] The push nut 26 is provided with a longitudinal internal threaded hole, which meshes with the external threaded screw of the push screw. By applying torque to the push screw through the hexagonal prism of the push screw, the rotational motion of the push screw 23 can be converted into linear motion of the push nut 26, so as to realize the longitudinal push adjustment of the fine-tuned track plate 3; the right side of the push nut 26 is a concave cross-section, which can be engaged with the end of the fine-tuned track plate 3, so as to limit the vertical displacement and rotational motion of the push nut 26 when the longitudinal position of the fine-tuned track plate 3 is adjusted; a second screw hole is provided on the top of the push nut 26, the second screw hole is connected with the internal threaded hole, and the second screw hole is installed with a second oil hole screw. After removing the second oil hole screw, lubricating oil can be added to the internal thread of the push nut 26 and the external threaded screw of the push screw 23 meshed therewith through the second screw hole.

[0033] Example 2

[0034] Based on the device of Example 1, the present invention further discloses a method for longitudinal fine adjustment of a CRTSⅡ type track plate, comprising the following steps:

[0035] When the track slabs of CRTSⅡ type track slabs on operating high-speed railways are fine-tuned due to track slab replacement, track slab displacement, etc., the adjacent track slabs are generally in an undissociated state (the track slabs are connected to the lower structure), and the track slabs to be fine-tuned are in a dissociated state (the track slabs are not connected to the lower structure). Therefore, the adjacent track slabs can be used as fixed track slabs 1 to provide longitudinal fine-tuning reaction force to the track slab 3 to be fine-tuned.

[0036] Step 1: Installation of track plate longitudinal fine-tuning device

[0037] After the fine-tuned track plate 3 is roughly laid in place, measure the inter-plate joint width between the fine-tuned track plate 3 and the adjacent track plates on both sides. Install the track plate longitudinal fine-tuning device 2 on the side with the smaller inter-plate joint width with the adjacent track plate. During the specific installation, the left vertical surface of the bearing seat 21 contacts the side surface of the plate end of the fixed track plate 1; the left flange plate of the bearing seat 21 is clamped on the top surface of the plate end of the fixed track plate 1; the concave section on the right side of the push nut 26 is engaged with the end of the fine-tuned track plate 3.

[0038] Step 2: Adjust the longitudinal position of the track plate

[0039] A wrench is used to apply torque to the hexagonal prism in the middle of the push screw 23 to make it rotate, and the rotational motion of the push screw 23 is converted into the linear motion of the push nut 26, thereby realizing the longitudinal push adjustment of the finely adjusted track plate 3. Its maximum longitudinal adjustment capacity is 60mm.

[0040] The existing newly built CRTSⅡ type track plate longitudinal adjustment technology, CRTSⅡ type track plate horizontal and vertical position adjustment technology, and other types of track plate longitudinal position adjustment technology are all unable to quickly and accurately adjust the longitudinal position of the CRTSⅡ type track plate within the window time of the operating line high-speed railway, and the adjustment amount is not less than 50mm. The method for rapid fine-tuning of CRTSⅡ type track plates described in the present invention proposes installing a track plate longitudinal fine-tuning device at the plate gap between the adjacent track plates on the side with a smaller gap between the plates, and using the adjacent undissociated track plates as fixed track plates to provide a source of longitudinal adjustment reaction force for the track plate to be fine-tuned. A torque is applied to the push screw of the track plate longitudinal fine-tuning device through a wrench to rotate it, and the rotational motion is converted into the linear motion of the push nut, thereby realizing the longitudinal push adjustment of the track plate to be fine-tuned, and its maximum longitudinal adjustment capacity can reach 60mm.

[0041] Example 3

[0042] High-speed railway CRTSⅡ type slab ballastless track construction equipment is characterized by: including a CRTSⅡ type track slab rapid fine-tuning device that adopts the CRTSⅡ type track slab longitudinal fine-tuning method described in Example 2.

[0043] The longitudinal fine adjustment method of CRTSⅡ track plate meets the working conditions and technical requirements of adjustment amount, does not affect the previous and next processes, and can be used during the skylight period. In addition, the tooling is compact, durable, simple to operate, and efficient.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A CRTSⅡ type track plate longitudinal fine adjustment device, comprising a bearing seat 21, a thrust ball bearing 22, a thrust screw 23, a bearing cover 24, a bearing cover screw 25, a thrust nut 26, a first oil hole screw 27, and a second oil hole screw 28, wherein the characteristics are: The right side of the bearing seat 21 is provided with a cylindrical groove for mounting a thrust ball bearing 22; the race of the thrust ball bearing 22 and the cylindrical groove of the bearing seat 21 are interference fit to form a whole; the top of the bearing seat 21 is provided with a first screw hole for mounting a first oil hole screw 27; The inner hole of the shaft ring of the thrust ball bearing 22 is interference fit with the outer circle of the shaft ring at the left end of the push screw 23; The bearing cover 24 is fixed on the bearing seat 21 by the bearing cover screws 25; The push nut 26 is provided with a longitudinal internal threaded hole meshing with the external threaded screw of the push screw. By applying torque to the push screw through the hexagonal prism of the push screw, the rotational motion of the push screw 23 can be converted into the linear motion of the push nut 26. A second screw hole with a second oil hole screw 28 installed is formed at the top of the push nut 26, and lubricating oil is added to the internal thread of the push nut 26 and the external thread of the push screw 23 meshing therewith through the second screw hole.

2. The CRTSⅡ type track plate longitudinal fine adjustment device according to claim 1 is characterized by: The left vertical surface of the bearing seat 21 contacts the side surface of the plate end of the fixed track plate 1; there is a flange plate on the upper left side of the bearing seat 21 for clamping on the top surface of the plate end of the fixed track plate 1; the outer edge of the cylindrical groove is also evenly provided with screw holes for installing the bearing cover.

3. The CRTSⅡ type track plate longitudinal fine adjustment device according to claim 1 is characterized by: The right side of the collar is a thrust surface, which fits with the end surface of the shaft ring of the thrust ball bearing 22. The shaft ring of the thrust ball bearing 22 is fixed to the thrust screw as a whole and can rotate around the central axis.

4. The CRTSⅡ type track plate longitudinal fine adjustment device according to claim 1 is characterized by: The middle part of the push screw 23 is provided with a hexagonal prism for a wrench to apply torque, and the right end of the push screw 23 is an external thread screw.

5. The CRTSⅡ type track plate longitudinal fine adjustment device according to claim 1 is characterized by: After the bearing cover 24 is processed as a whole, it is cut into two symmetrical pieces from the middle.

6. The CRTSⅡ type track plate longitudinal fine adjustment device according to claim 1 is characterized by: The right side of the push nut 26 is a concave cross-section, which engages with the end of the fine-tuned track plate 3 to limit the vertical displacement and rotational movement of the push nut 26 when the longitudinal position of the fine-tuned track plate 3 is adjusted.

7. A method for longitudinal fine adjustment of a CRTSⅡ type track plate, the method is based on the longitudinal fine adjustment device of the CRTSⅡ type track plate according to claim 1, and is characterized by: The steps include: Step 1: Install the track plate longitudinal fine adjustment device; Step 2: Adjust the longitudinal position of the track plate.

8. The method for longitudinal fine adjustment of CRTSⅡ type track slab according to claim 7 is characterized by: The step 1 further includes the following contents: after the fine-tuned track plate 3 is roughly laid in place, the width of the inter-plate joints between the fine-tuned track plate 3 and the adjacent track plates on both sides is measured; the track plate longitudinal fine-tuning device 2 is installed on the side with the smaller inter-plate joint width between the adjacent track plates; during the specific installation, the left vertical surface of the bearing seat 21 contacts the side surface of the plate end of the fixed track plate 1; the left flange plate of the bearing seat 21 is clamped on the top surface of the plate end of the fixed track plate 1; the concave section on the right side of the push nut 26 is engaged with the end of the fine-tuned track plate 3.

9. The method for longitudinal fine adjustment of CRTSⅡ type track slab according to claim 7, characterized in that said step 2 further comprises the following contents: By applying torque to the hexagonal prism in the middle of the push screw 23 with a wrench to make it rotate, the rotational motion of the push screw 23 will be converted into linear motion of the push nut 26, thereby realizing the longitudinal push adjustment of the fine-tuned track plate 3, and its maximum longitudinal adjustment capacity is 60mm.

10. A high-speed railway CRTSⅡ type slab ballastless track construction equipment, characterized by: The invention comprises a CRTSⅡ type track slab rapid fine adjustment device which adopts the CRTSⅡ type track slab longitudinal fine adjustment method described in any one of claims 7-9.

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