Test piece sleeve film pressure forming device for high-speed railway engineering

Abstract

The utility model relates to the technical field of railway engineering, in particular to a test piece sleeve film pressure forming device for high-speed railway engineering, which comprises a base, and a first square die, a chassis and a second square die are sequentially mounted on the upper end surface of the base from bottom to top; the chassis is connected with the first square mold and the second square mold through a connecting structure; the fixing column is further sequentially provided with an inserting and tamping structure and a pressurizing structure from bottom to top. The inserting and tamping structure comprises a first rotating sleeve, a first connecting arm, a first base and an inserting and tamping rod; the inserting and tamping rod is vertically distributed and is connected with the first base through a driving piece so as to complete up-down reciprocating inserting and tamping motion; the pressurizing structure comprises a second rotating sleeve, a second connecting arm, a second base and a pressurizing testing machine; the pressurization testing machine is arranged on the second base and is used for applying a load to the mixture in the second square mold. According to the utility model, the mode of integrally performing insertion tamping and vibration and applying the pressurizing head to assist in matching the pressurizing load is adopted, so that time and labor are saved, the working efficiency is improved, and the compressive strength of the concrete test piece is ensured.

Description

Technical Field

[0001] The utility model relates to the technical fields of railway engineering and ballastless track, and in particular to a test piece sleeve film pressure molding device for high-speed railway engineering. Background Art

[0002] In the high-speed 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. As a result, the supporting layer mixture cannot reflect the true strength, increasing the risk of shrinkage and cracking of the supporting layer, causing irregular sinking of the high-speed railway ballastless track sleepers, and ultimately causing high-speed railway train safety accidents. Summary of the invention

[0003] In order to solve the above-mentioned shortcomings and deficiencies of the existing concrete specimen compressive strength test structure, the utility model provides a specimen sleeve pressure molding device for high-speed railway engineering, which has a reasonable structural design, integrated tamping, vibration and application of a pressure head to assist in the pressure load, greatly saves the required labor and improves work efficiency.

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

[0005] A test piece sleeve pressure molding device for high-speed railway engineering, the molding device comprises a base, the base is distributed on the left and right, and a first square mold, a chassis and a second square mold are installed on the upper end surface of the base in sequence from bottom to top; and the chassis is connected to the first square mold and the second square mold by a connecting structure; the first square mold and the second square mold are cavity structures with two ends through, and the cavity of the first square mold is larger than the cavity of the second square mold; a mounting groove is also provided on one side of the base, and a pressure head is adapted to be installed in the mounting groove, and in the working state, the pressure head is adapted to be installed in the second square mold; a vertically distributed fixing column is also provided on one side of the base, and a tamping structure and a pressure structure are installed on the fixing column in sequence from bottom to top; the The tamping structure includes a first rotating sleeve, a first connecting arm, a first base and a tamping rod; the first rotating sleeve is arranged on a fixed column, and the two can rotate relative to each other but cannot move relative to each other; the first connecting arm is horizontally distributed on the first rotating sleeve, the first base is arranged on the first connecting arm, and the tamping rod is vertically distributed and connected to the first base through a driving member to complete an up and down reciprocating tamping movement; the pressurizing structure includes a second rotating sleeve, a second connecting arm, a second base and a pressurizing testing machine; the second rotating sleeve is rotatably arranged on the fixed column, one end of the second connecting arm is connected to the second rotating sleeve and the other end is connected to the second base, and the pressurizing testing machine is arranged on the second base to apply a load to the mixture in the second square mold.

[0006] Preferably: the connection structure includes a connection column and a connection groove; the connection column is arranged on the chassis, and there are four of them symmetrically distributed up and down and left and right; the connection groove is opened on the upper end surface of the first square mold and the lower end surface of the second square mold, and the connection groove is matched with the connection column and installed.

[0007] Further preferably, a handle is provided on one side of the chassis.

[0008] Further preferably, the cross-sections of the first square mold and the second square mold are square structures with the same side lengths; the height of the first square mold is greater than that of the second square mold, and the wall thickness of the first square mold is less than that of the second square mold.

[0009] Further preferably, when the load is applied, the chassis is pulled out, and a screw hole connecting piece is further provided at the connection between the first square mold and the second square mold, so that the first square mold and the second square mold remain vertical.

[0010] Further preferably, an L-shaped plate is further provided on the base, so that the center of the first square mold corresponds to the center of the base.

[0011] Further preferably: the driving member includes a driving motor, a driving wheel, and a driven wheel; the driving motor is arranged on the first base, and the driving wheel is arranged on the output shaft of the driving motor; the driven wheel is arranged in the first base, and the two can rotate relative to each other but cannot move relative to each other. At the same time, the driven wheel is sleeved and installed on the tamping rod, and the two are threadedly connected, and the driving wheel and the driven wheel are matched and installed.

[0012] Further preferred: the fixing column is also provided with a fixing plate with an opening; the first rotating sleeve and the second rotating sleeve are respectively provided with a first positioning plate and a second positioning plate with an opening; in the tamping state, the first positioning plate and the fixing plate are connected by fixing bolts, and the second positioning plate is away from the fixing plate; in the load state, the second positioning plate and the fixing plate are connected by fixing bolts, and the first positioning plate is away from the fixing plate.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the pressure molding device has a simple structure, a reasonable design, is light and fast to use, safe and stable, is easy to assemble and disassemble, and avoids accidental injuries that may occur when pressure is applied and the impact on the accuracy of the molded specimen itself; at the same time, the device can accurately apply a load of 120KN to the filler in the test mold; further, because 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 specimen 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 specimen during molding, and ensures the compressive strength and qualified rate of the specimen molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the connection structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the tamping structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the pressurizing structure of the utility model;

[0019] Figure 5It is a structural schematic diagram of the driving member of the utility model;

[0020] Figure 6 This is a connection state diagram of the screw hole connecting piece of the utility model.

[0021] In the figure: 1. base; 11. mounting groove; 12. pressurizing head; 13. L-shaped plate; 2. first square mold; 3. chassis; 31. handle; 4. second square mold; 5. connecting structure; 51. connecting column; 52. connecting groove; 6. fixing column; 61. fixing plate; 62. first positioning plate; 63. second positioning plate; 7. ramming structure; 71. first rotating sleeve; 72. first connecting arm; 73. first base; 74. ramming rod; 8. pressurizing structure; 81. second rotating sleeve; 82. second connecting arm; 83. second base; 84. pressurizing testing machine; 9. driving member; 91. driving motor; 92. driving wheel; 93. driven wheel; 10. screw hole connecting piece. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Example: Figures 1 to 6 As shown:

[0026] A test piece sleeve pressure molding device for high-speed railway engineering, the molding device comprises a base 1, the base 1 is distributed on the left and right, and a battery is arranged in the base to drive the device with electricity. Figure 1 As shown: the first square mold 2, the bottom plate 3 and the second square mold 4 are installed in sequence from bottom to top on the upper end surface of the base 1. The bottom plate 3 is connected to the first square mold 2 and the second square mold 4 through a connecting structure 5. Specifically, as shown Figure 2 As shown: the connection structure 5 includes a connection column 51 and a connection groove 52. The connection column 51 is arranged on the chassis 3, and there are four of them symmetrically distributed up and down and left and right; and the connection column itself remains extended forward and backward. The connection groove 52 is opened on the upper end surface of the first square mold 2 and the lower end surface of the second square mold 4, and the connection groove 52 is matched and installed with the connection column 51. A handle 31 is also provided on one side of the chassis 3. Such a configuration facilitates the disassembly and installation of the chassis. When the chassis is installed, it is used to form a preliminary formed specimen in the second square mold. After the chassis is pulled out by the handle, it is convenient to demold the concrete specimen in the second square mold and enter the first square mold, which saves time and effort. In this embodiment, a groove can also be set in the center of the base, a vibrator is set in the groove, and a top plate is set above the vibrator, wherein the bottom of the first square mold is located above the top plate and in the groove, and the square mold structure is vibrated as a whole through the top plate.

[0027] like Figure 6 As shown: In this embodiment, the first square mold 2 and the second square mold 4 are hollow structures with two ends connected, and the cavity of the first square mold 2 is larger than the cavity of the second square mold 4. Specifically, the cross-sections of the first square mold 2 and the second square mold 4 are square structures with the same side length; that is, the appearance structure is the same. And the height of the first square mold 2 is greater than that of the second square mold 4, and the wall thickness of the first square mold 2 is less than that of the second square mold 4; thus, the space M1 of the first square mold is larger than the space M2 of the second square mold, which provides a strong foundation for the subsequent demoulding of the second square mold, and at the same time provides excellent conditions for the subsequent rapid molding of the mixed material in the first square mold. When the load is applied, the disk 3 is pulled out, and the connection between the first square mold 2 and the second square mold 4 is also provided with a screw hole connecting piece 10, so that the first square mold 2 and the second square mold 4 remain vertical. Among them, holes are opened on the side walls of the first square mold and the second square mold, and the screw hole connecting piece is matched with screws to facilitate the staff to quickly complete the position fixing of the first square mold and the second square mold after the chassis is pulled out. An L-shaped plate 13 is also provided on the base 1 so that the center of the first square mold 2 is kept corresponding to the center of the base 1. The purpose of such a setting is to facilitate the first square mold as a basis to find the center position on the base, and to use the position of the first square mold as the center point to assist in designing the tamping rod or the output shaft of the pressure testing machine in the working state after the indexing to find the correct position.

[0028] like Figure 1As shown: In this embodiment, a mounting groove 11 is also provided on one side of the base 1, and a pressure head 12 is adapted to be installed in the mounting groove 11. Such a configuration facilitates regular placement. In the working state, the pressure head 12 is adapted to be installed in the second square mold 4; it is used to pressurize the added concrete mixture. A vertically distributed fixed column 6 is also provided on one side of the base 1, and a tamping structure 7 and a pressure structure 8 are also installed on the fixed column 6 from bottom to top. Among them, as Figure 3 As shown: the tamping structure 7 includes a first rotating sleeve 71, a first connecting arm 72, a first base 73 and a tamping rod 74. The first rotating sleeve 71 is set on the fixed column 6, and the two can rotate relative to each other but cannot move relative to each other; the two can be achieved by keyway matching. The first connecting arm 72 is horizontally distributed on the first rotating sleeve 71, the first base 73 is set on the first connecting arm 72, and the tamping rod 74 is vertically distributed and connected to the first base 73 through the driving member 9 to complete the up and down reciprocating tamping movement. Figure 5 As shown: the driving member 9 includes a driving motor 91, a driving wheel 92, and a driven wheel 93; the driving motor 91 is arranged on the first base 73, and the driving motor adopts a servo control motor. The driving wheel 92 is arranged on the output shaft of the driving motor 91; the driven wheel 93 is arranged in the first base 73, and the two can rotate relative to each other but cannot move relative to each other. At the same time, the driven wheel 93 is sleeved and installed on the tamping rod 74, and the two are threadedly connected, and the driving wheel 92 and the driven wheel 93 are matched and installed.

[0029] With such a configuration, in the tamping state, the staff first rotates the first rotating sleeve so that the central axis of the tamping rod connected to the first connecting arm is coaxial with the first square mold and the second square mold connected and assembled below. Then the drive motor is turned on, and the drive motor rotates forward, which will drive the driving wheel and the driven wheel to rotate, and then drive the tamping rod to rotate and move downward to perform tamping operations on the mixture in the second square mold. Then the drive motor is reversed, which will drive the tamping rod to move up and reset, and the operation is repeated to complete the tamping operation of the mixture. At the same time, the drive motor can be connected to a control switch for operation.

[0030] In this embodiment, Figure 4As shown: the pressurizing structure 8 includes a second rotating sleeve 81, a second connecting arm 82, a second base 83 and a pressurizing test machine 84. The second rotating sleeve 81 is rotatably arranged on the fixed column 6, one end of the second connecting arm 82 is connected to the second rotating sleeve 81, and the other end is connected to the second base 83, and the pressurizing test machine 84 is arranged on the second base 83, and is used to apply a load to the mixed material in the second square mold 4. At the same time, the pressurizing test machine has its own control switch, which can be started and stopped by a button. Such a setting facilitates the pressurizing test machine to automatically pressurize the mixed material in the square mold. In this embodiment, the fixed column 6 is also provided with a fixed plate 61 with an opening; the first rotating sleeve 71 and the second rotating sleeve 81 are respectively provided with a first positioning plate 62 and a second positioning plate 63 with an opening; in the ramming state, the first positioning plate 62 is connected to the fixed plate 61 by a fixing bolt, and the second positioning plate 63 is away from the fixed plate 61. In the load state, the second positioning plate 63 is connected to the fixed plate 61 by a fixing bolt, and the first positioning plate 62 is away from the fixed plate 61. The purpose of such a setting is that in the ramming state, the first positioning plate 62 is connected to the fixed plate 61 by a fixing bolt or a pin, and the second positioning plate 63 is away from the fixed plate 61, so that the position of the first connecting arm is fixed, and the position correspondence between the ramming rod and the square mold is ensured. The ramming operation and the pressurizing operation are performed in sequence, so the connection between the first positioning plate, the second positioning plate and the fixed plate is a single operation, either the first positioning plate is connected to the fixed plate, or the second positioning plate is connected to the fixed plate. Such a setting has a reasonable structural design and can be operated by one person, saving time and effort.

[0031] Working process: In this embodiment, the following is preferably used: Pressure head: cast iron material, a cube with a bottom surface of 148mm and a height of 100mm. Second square mold: cast iron material, a cube with a side length of 180mm, a height of 150mm, and a thickness of 15mm. Chassis: cast iron material, a cube with a side length of 180mm, a thickness of 20mm, and a handle on the front. First square mold: cast iron material, a cube with a side length of 180mm, a height of 180mm, and a thickness of 10mm. When the concrete mixture is mixed, it should be poured onto a non-absorbent bottom plate, and the quartering method should be used to take samples and load them into the second cast iron square mold (the first square mold and the second square mold are pre-connected through the chassis to form a filler combination structure, refer to Figure 2). The mixture is loaded into the second square mold by the quartering method to about half the height. Then the first connecting arm is rotated counterclockwise until the tamping rod is consistent with the center of the square mold; the tamping rod is used to tamp evenly, and the loading is continued after the tamping is dense, and then the second loading should be slightly higher than the top surface of the second square mold, and a pressure head is added above the second square mold. After the loading is completed and the pressure head is pressed, the vibrator attached to the base is turned on to vibrate the test mold combination structure and the mixture until the pressure head no longer sinks. In the next step, the first connecting arm is rotated clockwise to make the tamping rod away from the square mold, and the second connecting arm is rotated clockwise to align the output shaft of the pressure test machine with the square mold. In this way, the second square mold with the sample, the chassis and the pressure head are placed under the pressure test machine, and the output shaft of the pressure test machine acts on the pressure head. The pressure test machine is started to load evenly to 120KN, and the load is unloaded after 5 seconds of stable load. At this time, the mixture inside the second square mold becomes dense and has been formed. The two will not separate, and can only be demolded by applying external force. Then the staff pulled out the chassis, placed the second square mold on the first square mold and connected the first square mold and the second square mold with a special screw hole connecting piece to keep them vertical up and down. Figure 6 The structure shown.

[0032] The next step is to place the mixture in the pressure test machine again to apply the load. The filler in the second square mold moves downward into the first square mold along with the pressure head. Since there is a large gap between the size of the first square mold and the size of the test piece, the test piece can be demolded. After demolding, the test piece should avoid vibration and impact, and immediately move the test piece to the standard curing room for curing. The curing conditions are 20℃±2℃, and the relative humidity is not less than 95%. After curing for 28 days, the compressive strength test is carried out again. The device can accurately apply a load of 120KN 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.

[0033] 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 test piece casing pressure molding device for high-speed railway engineering, characterized in that: The forming device comprises a base (1), the base (1) being arranged on the left and right, and a first square die (2), a chassis (3) and a second square die (4) being arranged on the upper end surface of the base (1) in order from bottom to top; and the chassis (3) and the first square die (2) and the second square die (4) are connected via a connecting structure (5); the first square die (2) and the second square die (4) are hollow structures with two ends connected, and the hollow cavity of the first square die (2) is larger than the hollow cavity of the second square die (4); a mounting groove (11) is arranged on one side of the base (1), and a pressure head (12) is fitted in the mounting groove (11), and in a working state, the pressure head (12) is fitted in the second square die (4); a vertically arranged fixing column (6) is arranged on one side of the base (1), and a tamping structure (7) and a pressure structure (8) are fitted on the fixing column (6) in order from bottom to top; the tamping structure (7) comprises a first rotating sleeve (71), a first connecting sleeve (72), and a second connecting sleeve (73). A connecting arm (72), a first base (73) and a tamping rod (74); the first rotating sleeve (71) is arranged on the fixed column (6), and the two can rotate relative to each other but cannot move relative to each other; the first connecting arm (72) is arranged horizontally on the first rotating sleeve (71), the first base (73) is arranged on the first connecting arm (72), and the tamping rod (74) is arranged vertically and connected to the first base (73) through a driving member (9) to complete an up and down reciprocating tamping movement; the pressurizing structure (8) comprises a second rotating sleeve (81), a second connecting arm (82), a second base (83) and a pressurizing test machine (84); the second rotating sleeve (81) is rotatably arranged on the fixed column (6), one end of the second connecting arm (82) is connected to the second rotating sleeve (81) and the other end is connected to the second base (83), and the pressurizing test machine (84) is arranged on the second base (83) and is used to apply a load to the mixed material in the second square mold (4).

2. A test piece sleeve pressurizing molding device for high-speed railway engineering as claimed in claim 1, characterized in that: The connection structure (5) comprises a connection column (51) and a connection groove (52); the connection columns (51) are arranged on the chassis (3) and are four in number and symmetrically distributed vertically and horizontally; the connection grooves (52) are opened on the upper end surface of the first square mold (2) and the lower end surface of the second square mold (4), and the connection grooves (52) are matched and installed with the connection columns (51).

3. A high-speed railway engineering test piece sleeve pressurizing molding device as claimed in claim 2, characterized in that: A handle (31) is also provided on one side of the chassis (3).

4. A test piece casing pressure molding device for high-speed railway engineering as claimed in claim 3, characterized in that: The cross-sections of the first square mold (2) and the second square mold (4) are square structures with the same side lengths; the height of the first square mold (2) is greater than that of the second square mold (4), and the wall thickness of the first square mold (2) is less than that of the second square mold (4).

5. A test piece casing pressure molding device for high-speed railway engineering as claimed in claim 4, characterized in that: When a load is applied, the chassis (3) is pulled out, and a screw hole connecting piece (10) is provided at the connection between the first square mold (2) and the second square mold (4), so that the first square mold (2) and the second square mold (4) remain vertical.

6. A test piece sleeve pressurizing molding device for high-speed railway engineering as claimed in claim 5, characterized in that: An L-shaped plate (13) is also provided on the base (1) so that the center of the first square mold (2) remains corresponding to the center of the base (1).

7. A test piece casing pressure molding device for high-speed railway engineering as claimed in claim 6, characterized in that: The driving member (9) comprises a driving motor (91), a driving wheel (92), and a driven wheel (93); the driving motor (91) is arranged on a first base (73), and the driving wheel (92) is arranged on an output shaft of the driving motor (91); the driven wheel (93) is arranged in the first base (73), and the two can rotate relative to each other but cannot move relative to each other; at the same time, the driven wheel (93) is sleeved and mounted on the tamping rod (74), and the two are threadedly connected, and the driving wheel (92) and the driven wheel (93) are matched and mounted.

8. A test piece casing press molding device for high-speed railway engineering as claimed in claim 7, characterized in that: The fixing column (6) is also provided with a fixing plate (61) with a hole; the first rotating sleeve (71) and the second rotating sleeve (81) are respectively provided with a first positioning plate (62) and a second positioning plate (63) with a hole; in a tamping state, the first positioning plate (62) is connected to the fixing plate (61) by fixing bolts, and the second positioning plate (63) is away from the fixing plate (61); in a load state, the second positioning plate (63) is connected to the fixing plate (61) by fixing bolts, and the first positioning plate (62) is away from the fixing plate (61).

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