Concrete pressure forming equipment for railway ballastless track

Abstract

The utility model relates to the technical field of ballastless tracks, in particular to concrete pressure forming equipment for a railway ballastless track, which comprises a supporting seat, and a moving block is connected onto the supporting seat through a driving structure, so that the moving block can move by a preset distance to complete inserting tamping and pressurizing operation; a lower test mold is further adaptively mounted at the square groove, an upper test mold is arranged above the lower test mold, and a chassis is further arranged between the lower test mold and the upper test mold; an inserting and tamping structure is arranged on one side of the loading plate and comprises an inserting and tamping rod, a rack plate, a gear and a rotating motor; the rotating motor is arranged on the mounting plate, the gear is arranged on an output shaft of the rotating motor, the rack plate is meshed with the gear, and the inserting and tamping rods are vertically distributed and connected with the rack plate; and a press machine is further mounted on the other side of the mounting plate through a bracket. According to the utility model, the filling operation of inserting and tamping, vibrating and pressurizing can be automatically and integrally completed, and the 28d compressive strength test piece of the hydraulic mixture of the ballastless track supporting layer of the high-speed railway can be flexibly, conveniently, accurately and safely formed.

Description

Technical Field

[0001] The utility model relates to the technical fields of railway engineering and ballastless track, and in particular to concrete pressure-forming equipment for railway ballastless track. Background Art

[0002] In the railway ballastless track system, the hydraulic mixture used for the supporting layer concrete ballast slab and track slab is made of fine aggregate, coarse aggregate, a small amount of cementitious material and a small amount of water. The supporting layer material has a compaction coefficient of 0.98 after being formed by paving and rolling. The hydraulic mixture has poor cohesion between particles. After the mixture is stirred, the filling in the test mold should be dense to ensure that the 28d compressive strength of the hydraulic mixture meets the requirements of 15Mpa±3Mpa. According to the requirements of "High-speed Beam Ballastless Track Support Layer" (Q / CR8-2014), the production of compressive strength test pieces should be carried out in accordance with the provisions of GB / T50081, and a load of 120KN is applied to the test mold to make a standard 150mm×150mm×150mm cubic compressive strength test piece. However, the traditional filling method is manual work. Since the supporting layer of the high-speed railway ballastless track is a hydraulic mixture, there are special requirements for the size and applied load when the specimen is formed. The concrete mixture is loaded into the test mold in two layers, and the thickness of each layer is roughly equal. The specimen is tamped with a tamping rod. After rubbing, it is gently tapped around with a rubber hammer until the holes left by the tamping rod disappear. This method of manual tapping or manual tapping + vibration molding is time-consuming and laborious, and it does not meet the parameters required by the standard, and it is impossible to form a standard compressive strength specimen. In addition, during the use of the ballastless track, the supporting layer mixture cannot reflect the true strength, resulting in an increased risk of shrinkage and cracking of the supporting layer. In severe cases, it will cause irregular sinking of the high-speed railway ballastless track sleepers, which will cause problems with the driving safety of high-speed railway trains. For this reason, we need a concrete pressurized molding equipment for railway ballastless tracks. Summary of the invention

[0003] In order to solve the above-mentioned shortcomings and deficiencies of the existing supporting layer mixture filling in the prior art, the utility model provides a railway ballastless track concrete pressurized molding equipment which can automatically and integratedly complete the tamping-vibration-pressurization filling operation, has a reasonable structural design, and is flexible, lightweight, accurate and safe for molding 28d compressive strength test pieces of the hydraulic mixture of the supporting layer of the high-speed railway ballastless track.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A concrete pressurizing and molding device for railway ballastless track comprises a support seat, the support seats are horizontally distributed on the left and right sides, a moving block is connected to the support seat through a driving structure, so that the moving block can move a preset distance to complete the tamping and pressurizing operations; a square groove is provided in the center of the moving block, and a vibrator is provided at the bottom of the square groove; a lower test mold is also adapted to be installed at the square groove, an upper test mold is provided above the lower test mold, and a chassis is provided between the two; the lower test mold and the upper test mold have the same outer structure, both are square, and a cavity is provided inside, and the size of the cavity of the lower test mold is kept larger than that of the upper test mold; in the A card-embedding groove is also provided on one side of the support seat, and a pressure head is adapted to be installed at the position of the card-embedding groove; a vertically distributed connecting plate is also provided on the rear side of the support seat, and a mounting plate is also vertically connected to the upper end surface of the connecting plate; a tamping structure is provided on one side of the mounting plate, and the tamping structure includes a tamping rod, a rack plate, a gear and a rotating motor; the rotating motor is arranged on the mounting plate, and the gear is arranged on the output shaft of the rotating motor, the rack plate is vertically distributed and meshes with the gear, and the tamping rod is vertically distributed and connected to the rack plate; a press is also installed on the other side of the mounting plate through a bracket.

[0006] As a preferred technical solution: the driving structure includes an auxiliary plate, a driving motor, a driving screw and a moving part; the auxiliary plate is arranged on the left and right sides of the support seat, the driving motor is installed on the support seat through a bracket, the driving screw passes through the left auxiliary plate and is connected to the output shaft of the driving motor, and the other end of the driving screw passes through the moving block and is connected to the right auxiliary plate; the moving part is used for the moving block to maintain linear motion.

[0007] A further preferred technical solution: the moving part includes a slide rail and a moving groove; the moving grooves distributed on the left and right are opened at the bottom of the moving block; the slide rail is arranged on the support seat, and the slide rail is installed in a matching manner with the moving groove.

[0008] A further preferred technical solution: the driving structure also includes a first infrared sensor and a second infrared sensor, the first infrared sensor is arranged on the support seat and corresponds to the center axis position of the tamping rod; the second infrared sensor is arranged on the support seat and corresponds to the center axis position of the output shaft of the press; and the first infrared sensor and the second infrared sensor are electrically connected to the driving motor respectively.

[0009] As a preferred technical solution: the wall thickness of the lower test mold is smaller than the wall thickness of the upper test mold, and the height of the lower test mold is greater than the height of the upper test mold.

[0010] A further preferred technical solution: the chassis is provided with four sliding columns symmetrically distributed up and down and left and right, and the sliding columns are distributed front and back; the lower end surface of the upper test mold and the upper end surface of the lower test mold are both provided with sliding grooves, and the sliding columns are matched and installed with the sliding grooves;

[0011] A further preferred technical solution is that when the load is applied, the chassis is pulled out, and a vertically distributed screw hole connecting piece is provided at the connection between the upper test mold and the lower test mold, so that the upper test mold and the lower test mold maintain corresponding positions and are vertical up and down.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the test mold is made of iron material, and by setting the test mold combined structure, it is convenient to fill the material, and at the same time, with the auxiliary cooperation vibrator, the device can be placed on the vibration of the moving block when the mixed material is loaded, and the material can be loaded while vibrating, which saves time and effort; by setting the cooperation of the tamping rod, the rack plate, the gear and the rotating motor, the tamping operation can be automatically performed, which solves the problem of traditional manual tamping, which is time-consuming and labor-intensive, and further provides a press machine, and covers the pressure head after the loading is completed, and the press machine can accurately apply a load of 120KN to the test mold mixed material, which solves the problems of the test piece molding size and the applied force (120KN load) and the test piece The problem of appearance (no holes, honeycomb surface) is solved; the auxiliary plate, drive motor, drive screw and moving parts are further used to realize the automation and integration of the tamping-vibration-pressurization filling operation, and at the same time, the purpose of flexibly, lightly, accurately and safely forming the 28d compressive strength specimens of the hydraulic mixture of the high-speed railway ballastless track supporting layer is achieved. The relevant parameters required by the standard can be accurately controlled, and the compressive strength grade of the supporting layer itself can be truly reflected, which avoids the inability of the supporting layer mixture to reflect the actual strength, increases the risk of shrinkage and cracking of the supporting layer, and causes irregular sinking of the high-speed railway ballastless track sleepers, which in turn causes problems with the driving safety of high-speed railway trains. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a stereoscopic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a front view of the overall structure of the utility model.

[0016] Figure 3 This is a test mold connection structure diagram of the utility model.

[0017] Figure 4 This is a demoulding structure diagram of the utility model after the chassis is pulled out.

[0018] Figure 5 It is a three-dimensional diagram of the tamping structure of the utility model.

[0019] In the figure: 1-support seat; 2-driving structure; 3-moving block; 4-square groove; 5-vibrator; 6-lower test mold; 7-upper test mold; 8-chassis; 9-embedded groove; 10-pressing head; 11-connecting plate; 12-mounting plate; 13-ramming structure; 14-ramming rod; 15-rack plate; 16-gear; 17-rotating motor; 18-pressing machine; 19-auxiliary plate; 20-driving motor; 21-driving screw; 22-moving part; 23-slide rail; 24-moving groove; 25-first infrared sensor; 26-second infrared sensor; 27-sliding column; 28-slide groove; 29-screw hole connecting piece. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that in the specific implementation of the utility model, the terms such as "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the phrase "including a ..." and other limited elements that may appear do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "provided with" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] Example: Figures 1 to 5 As shown:

[0024] A concrete pressurizing and molding device for railway ballastless track comprises a support base 1, the support base 1 is horizontally distributed on the left and right sides, and a moving block 3 is connected to the support base 1 through a driving structure 2, so that the moving block 3 can move a preset distance to complete the tamping and pressurizing operation. Specifically, Figure 1 As shown: the driving structure 2 includes an auxiliary plate 19, a driving motor 20, a driving screw 21 and a moving part 22. The auxiliary plate 19 is fixedly arranged on the left and right sides of the support seat 1 to form a support for the driving screw, and the driving screw and the auxiliary plate are connected by bearings. The driving motor 20 is installed on the support seat 1 through a bracket, and the driving motor adopts a servo control motor. At the same time, the electricity required for the electrical parts in this embodiment is connected to the outside world through wires. One end of the driving screw 21 passes through the left auxiliary plate 19 and is connected to the output shaft of the driving motor 20, and the other end of the driving screw 21 passes through the moving block 3 and is connected to the right auxiliary plate. With this arrangement, when the driving motor starts to rotate forward, it will drive the driving screw to rotate clockwise, and then drive the moving block to move right; conversely, when the driving motor reverses, it will drive the moving block to move left and reset.

[0025] like Figure 1 As shown: In this embodiment, the moving member 22 is used to keep the moving block 3 in linear motion. Specifically, the moving member 22 includes a slide rail 23 and a moving groove 24. The moving grooves 24 distributed on the left and right are provided at the bottom of the moving block 3; the slide rail 23 is arranged on the support seat 1, and the slide rail 23 is matched with the moving groove 24 and installed. The cross-sections of the slide rail 23 and the moving groove 24 are any one of L-shaped, linear, and T-shaped structures. In this embodiment, the slide rail 23 adopts a linear structure. The purpose of such a setting is to ensure the guiding property of the moving block. As shown Figure 2 As shown: wherein, the driving structure 2 also includes a first infrared sensor 25 and a second infrared sensor 26, wherein the first infrared sensor 25 is arranged on the support seat 1 and corresponds to the central axis position of the tamping rod 14; the second infrared sensor 26 is arranged on the support seat 1 and corresponds to the central axis position of the output shaft of the press 18; and the first infrared sensor 25 and the second infrared sensor 26 are electrically connected to the driving motor 20 respectively. The connection between the infrared sensor and the driving motor can adopt a PLC controller, and its circuit and working principle are prior art, so it is not repeated here. When the driving motor drives the moving block to move to the position of the first infrared sensor, due to the position where the first infrared sensor is set, corresponding to the tamping rod, that is, the first infrared sensor can be used as a start and stop trigger signal of the driving motor, and can also be used as a start and stop signal of the rotating motor. Therefore, the first infrared sensor transmits a signal to the driving motor, and the driving motor stops. At this time, the center of the moving block corresponds to the central axis of the tamping rod, that is, the center of the tamping rod corresponding to the test mold, which is convenient for up and down tamping operations.

[0026] like Figure 2As shown: In this embodiment, a square groove 4 is provided in the center of the moving block 3, and a vibrator 5 is provided at the bottom of the square groove 4; it is used to vibrate the mixture in the test mold (that is, the mixture of the upper test mold and the chassis combination structure). A lower test mold 6 is also adapted to be installed at the square groove 4, and an upper test mold 7 is provided above the lower test mold 6, and a chassis 8 is provided between the two. Among them, the lower test mold 6 and the upper test mold 7 have the same outer structure, both of which are square, and are provided with a cavity therein, and the size of the cavity of the lower test mold 6 is maintained larger than that of the upper test mold 7. Specifically, the wall thickness of the lower test mold 6 is smaller than the wall thickness of the upper test mold 7, and the height of the lower test mold 6 is greater than the height of the upper test mold 7. Such a configuration facilitates the demolding of the pre-forming mixture of the upper test mold. As shown Figure 3 As shown: the chassis 8 is provided with four sliding columns 27 symmetrically distributed up and down and left and right, and the sliding columns 27 are distributed front and back. The lower end surface of the upper test mold 7 and the upper end surface of the lower test mold 6 are provided with sliding grooves 28, and the sliding columns 27 are installed in matching with the sliding grooves 28; such a configuration facilitates the installation and sliding withdrawal of the chassis. When the load is applied, the chassis 8 is withdrawn, and the connection between the upper test mold 7 and the lower test mold 6 is also provided with a vertically distributed screw hole connecting piece 29, so that the upper test mold 7 and the lower test mold 6 maintain corresponding positions and are vertical up and down. Specifically, holes are provided at the corresponding positions of the upper test mold and the lower test mold, and the screw hole connecting piece and the screws are used to facilitate the staff to fix the position of the upper and lower test molds.

[0027] like Figure 1 As shown: In this embodiment, a card slot 9 is also provided on one side of the support seat 1, and a pressure head 10 is installed at the position of the card slot 9; such a configuration is convenient for regular processing and storage of the pressure head, wherein the lower part of the pressure head is a cube and the upper part is a cylinder, which is adapted to the test mold for compaction. A vertically distributed connecting plate 11 is also provided on the rear side of the support seat 1, and a mounting plate 12 is vertically connected to the upper end surface of the connecting plate 11; the connecting plate and the mounting plate are welded and fixed, and reinforcing ribs are also provided between the connecting plate and the support seat to enhance stability. A tamping structure 13 is provided on one side of the mounting plate 12, such as Figure 5 As shown: wherein, the tamping structure 13 includes a tamping rod 14, a rack plate 15, a gear 16 and a rotating motor 17. The rotating motor 17 is arranged on the mounting plate 12, wherein the rotating motor adopts a servo control motor. The gear 16 is arranged on the output shaft of the rotating motor 17, the rack plate 15 is vertically distributed and meshes with the gear 16, and the tamping rod 14 is vertically distributed and connected to the rack plate 15. The rotating motor can maintain signal connection with the first infrared sensor to realize automatic control, and can also use an independent control switch for auxiliary control. A press 18 is also installed on the other side of the mounting plate 12 through a bracket. The press in this embodiment can also maintain signal connection with the second infrared sensor to realize automatic control, and can also use an independent control switch for auxiliary control.

[0028] The working principle of a concrete pressure forming equipment for railway ballastless track: After the concrete mixture is mixed, it should be poured on the non-absorbent bottom plate, and the sample should be loaded into the upper test mold by the quartering method (the upper test mold is connected to the bottom plate to form a primary filling structure in advance, refer to Figure 3 As shown). The mixture is loaded into the upper test mold by the quartering method to about half the height. Next, start the drive motor to rotate forward to drive the moving block to the position corresponding to the first infrared sensor, that is, the position corresponding to the tamping rod and the test mold, and the drive motor stops at this time. Then turn on the rotating motor. The forward rotation of the rotating motor will drive the rack plate to move down, and then use the tamping rod to tamp evenly. The reverse rotation of the rotating motor drives the rack plate to move up and reset, and so on. After the tamping is dense, continue to load. The next step is to start the second loading, which should be slightly higher than the top surface of the upper test mold. After loading, place a pressure head above the mixture in the inner cavity of the upper test mold, and turn on the vibrator installed on the square groove to vibrate until the pressure head no longer sinks. Then start the drive motor to continue to rotate forward, which will drive the moving block on the drive screw to continue to move right until it moves to the position of the second infrared sensor, that is, the position of the press corresponding to the test mold, and then turn off the drive motor. The upper test mold, chassis and pressure head containing the mixed material sample are placed under the press. The output shaft of the press applies a load to the pressure head. The press is started and the load is evenly applied to 120KN. The load is unloaded after 5 seconds of steady load. At this time, the mixed material in the upper test mold is extruded into shape.

[0029] Next, place the upper test mold on the lower test mold, pull out the chassis, and connect the upper and lower test molds with special screw hole connecting pieces to keep them vertical. Figure 4 As shown. The next step is to place the mixture under the press again and apply a load. The filler in the upper test mold is moved downward into the lower test mold as the pressure head is grasped and moved. Since there is a large gap between the size of the lower test mold and the size of the test piece, the test piece can be demolded. After demolding, the test piece should be free from vibration and impact, and the test piece should be immediately moved to a standard curing room for curing. The curing conditions are 20℃±2℃, and the relative humidity is not less than 95%. The compressive strength test is carried out after curing for 28 days. In this way, a load of 120KN can be accurately applied to the filler in the test mold; further, since the pressure molding device is in accordance with the compressive strength standard requirements, no large machinery is used during use, and one person can complete the entire test piece molding work, which greatly saves the required labor, improves work efficiency, avoids the safety problem of extrusion in the effective space, ensures the accuracy and effectiveness of the concrete test piece during molding, and ensures the compressive strength and qualified rate of the test piece molding.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A concrete pressurizing molding equipment for railway ballastless track, characterized in that: The invention comprises a support seat, which is horizontally distributed on the left and right sides, and a moving block is connected to the support seat through a driving structure, so that the moving block can move a preset distance to complete the tamping and pressurizing operations; a square groove is provided in the center of the moving block, and a vibrator is provided at the bottom of the square groove; a lower test mold is also adapted to be installed at the square groove, an upper test mold is provided above the lower test mold, and a chassis is also provided between the two; the lower test mold has the same outer structure as the upper test mold, both are square, and a cavity is provided inside, and the size of the cavity of the lower test mold is kept larger than that of the upper test mold; a spring is also provided on one side of the support seat. A card-embedded groove, at the position of which a pressure applying head is adapted to be installed; a vertically distributed connecting plate is also provided on the rear side of the support seat, and a mounting plate is also vertically connected to the upper end surface of the connecting plate; a tamping structure is provided on one side of the mounting plate, and the tamping structure includes a tamping rod, a rack plate, a gear and a rotating motor; the rotating motor is arranged on the mounting plate, and the gear is arranged on the output shaft of the rotating motor, the rack plate is vertically distributed and meshes with the gear, the tamping rod is vertically distributed and connected to the rack plate; a press is also installed on the other side of the mounting plate through a bracket.

2. The concrete pressurizing molding equipment for railway ballastless track according to claim 1, characterized in that: The driving structure includes an auxiliary plate, a driving motor, a driving screw and a moving part; the auxiliary plate is arranged on the left and right sides of the support seat, the driving motor is installed on the support seat through a bracket, the driving screw passes through the left auxiliary plate and is connected to the output shaft of the driving motor, and the other end of the driving screw passes through the moving block and is connected to the right auxiliary plate; the moving part is used for the moving block to maintain linear motion.

3. The concrete pressurizing and molding equipment for railway ballastless track according to claim 2, characterized in that: The moving member comprises a slide rail and a moving groove; the moving grooves distributed on the left and right are arranged at the bottom of the moving block; the slide rail is arranged on the supporting seat, and the slide rail is matched and installed with the moving groove.

4. The concrete pressurizing and molding equipment for railway ballastless track according to claim 3, characterized in that: The driving structure also includes a first infrared sensor and a second infrared sensor, the first infrared sensor is arranged on the support seat and corresponds to the central axis position of the tamping rod; the second infrared sensor is arranged on the support seat and corresponds to the central axis position of the output shaft of the press; and the first infrared sensor and the second infrared sensor are electrically connected to the driving motor respectively.

5. The concrete pressurizing and molding equipment for railway ballastless track according to claim 1, characterized in that: The wall thickness of the lower test mold is smaller than the wall thickness of the upper test mold, and the height of the lower test mold is greater than the height of the upper test mold.

6. The concrete pressurizing and molding equipment for railway ballastless track according to claim 5, characterized in that: The chassis is provided with four sliding columns symmetrically distributed up and down and left and right, and the sliding columns are distributed front and back; the lower end surface of the upper test mold and the upper end surface of the lower test mold are both provided with sliding grooves, and the sliding columns are matched and installed with the sliding grooves.

7. The concrete pressurizing and molding equipment for railway ballastless track according to claim 6, characterized in that: When the load is applied, the chassis is pulled out, and a vertically distributed screw hole connecting piece is provided at the connection between the upper test mold and the lower test mold, so that the upper test mold and the lower test mold maintain corresponding positions and are vertical up and down.

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