Novel Marshall compaction apparatus and operation method

Abstract

The invention relates to the technical field of civil engineering, and particularly discloses a novel Marshall compaction apparatus and an operation method, the novel Marshall compaction apparatus comprises a shell, a driving hammer, a driving rod, a push-out assembly, a buffer assembly, a control unit, a separation assembly and a slideway; the driving hammer is in sliding connection with the driving rod, the driving hammer slides up and down on the driving rod to hit the buffering assembly, the buffering assembly comprises a buffering base and a buffering soft cushion, and the buffering soft cushion absorbs vibration and transmits impact to the separating assembly; the buffer assemblies are respectively arranged at the upper end and the lower end of the striking rod; and the striking rod is connected with the buffer assembly in a manner of combining threaded connection and insertion connection. By using the buffer assembly, the noise caused by the operation of the Marshall compactor is reduced, the stability of the falling process of the driving hammer is also ensured, and the service life of the driving hammer is prolonged; the upper die and the lower die of the die are separated through the force of the air cylinder, manpower is saved, meanwhile, the service life of the die is prolonged, and meanwhile due to the effect of the sliding ways, the die can flow out conveniently, and accidental falling of the die can be avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of civil engineering, in particular to a new type of Marshall compaction apparatus and operating method. BACKGROUND

[0002] Using the existing Marshall compaction apparatus to make Marshall test pieces is too time-consuming and laborious, and a lot of noise is produced when the hammer is hit downward. Marshall test pieces are generally made in large quantities, which is extremely low in efficiency. Artificially changing the surface of the mold causes great damage to the mold, resulting in a shortened service life of the mold. When the hammer hits the buffer assembly, the connection is prone to loosening, causing the running length of the hammer to change, which disrupts the compaction rhythm. Special structures must be used to ensure the safe use of the buffer assembly.

[0003] Chinese Patent No. CN112414805A discloses a semi-automatic Marshall compaction apparatus, which controls the surface change of the Marshall mold manually and automatically fixes the position to reduce the labor intensity of workers. However, how the mold surface is changed by the electric mechanical arm is not clear. The rotational movement of the electric mechanical arm has exceeded the capacity range of the electric motor, and the control system is not reasonably explained, which is too poor in practicality.

[0004] Chinese Patent No. CN112198033A discloses a Marshall compaction apparatus and method, which uses two Marshall compaction devices to achieve the surface change and compaction of Marshall test pieces, improves the Marshall compaction efficiency, and collects the completed Marshall test pieces into a storage box by gravity. According to the reliability theory, it is not difficult to find that the more components a system has and the more complex the relationship is, the lower the reliability of the system is. Therefore, the practicality of the device is also questionable. SUMMARY

[0005] The present application provides a new type of Marshall compaction apparatus and operating method, which can solve one of the above technical problems.

[0006] The technical solution of the present application to solve the above technical problems is as follows:

[0007] A new type of Marshall compaction apparatus, comprising a shell, a hammer, a hammer rod, a push-out assembly, a buffer assembly, a control unit, a separation assembly, and a slide;

[0008] The hammer is slidably connected to the hammer rod, and the hammer slides up and down on the hammer rod to hit the buffer assembly. The buffer assembly comprises a buffer base and a buffer cushion, which absorbs vibration and transmits impact to the separation assembly.

[0009] The buffer assembly is arranged at the upper end and the lower end of the hammer rod to reduce the noise caused by the descent or ascent of the hammer. The connection between the hammer rod and the buffer assembly is a combination of threaded connection and plug-in connection, and machine screws are used to fix the buffer assembly.

[0010] The shell further comprises a motor, a stop sensor, a counting sensor and a chain, the motor is connected with the chain, the chain drives the hammer to move upward, the counting sensor is connected with the control unit, the counting sensor transmits the position information of the hammer to the control unit and increases the counting by one, the stop sensor is connected with the control unit, the stop sensor transmits the position information of the hammer to the control unit to stop the movement of the chain and clear the counting.

[0011] The separating assembly further comprises a pushing mechanism, a mold, a table plate and a support rod, one end of the support rod is threadedly connected with the table plate, and the other end is threadedly connected with the bottom of the shell.

[0012] The pushing-out assembly further comprises a pushing-out cylinder and an abutting part, the pushing-out assembly is connected with the table plate, the arc part of the abutting part abuts against the mold, the mold can be freely pushed out, the mold flows to the bottom of the shell through a slide, the mold further comprises an upper mold and a lower mold, the upper mold and the lower mold are connected in a plug-in manner, one end of the slide is threadedly connected with the shell, and the other end abuts against the ground.

[0013] The hammer further comprises a pushing finger, a hammer upper plate, a movable plate, a cylinder, a spring sheet, a sealing ring and a sealing plate, the cylinder has a hollow circular groove for placing fine sand with different densities from the cylinder to offset vibration and noise during the upward and downward movement of the hammer, the pushing finger is threadedly connected with the hammer upper plate, the movable plate has a circular hole located directly below the pushing finger, a pushing rod of the pushing finger moves along the upward and downward directions to clasp the movable plate to move forward and backward, and the hammer, the hammer rod and the buffer assembly move upward.

[0014] The pushing mechanism further comprises an upward and downward movement plate, a guide rod seat, a guide rod, a guide rod bearing, a buffer element, a positioning block, a separating plate, a movable joint, an upward and downward movement cylinder and a one-way valve.

[0015] The guide rod seat is threadedly connected with the upward and downward movement plate, the guide rod penetrates into the guide rod seat and abuts against the upward and downward movement plate, and the guide rod is slidably connected with the guide rod bearing.

[0016] The positioning block is arranged above the separating plate and is threadedly connected with the separating plate, and is used for abutting against the positioning block after the mold is placed.

[0017] One end of the movable joint is threadedly connected with the upward and downward movement plate, the other end is threadedly connected with the upward and downward movement cylinder, the upward and downward movement cylinder drives the movable joint and the upward and downward movement plate to move upward and downward, and one of the gas inlets of the upward and downward movement cylinder is threadedly connected with the one-way valve to prevent the upward and downward movement cylinder from running unstably due to sudden loss of gas supply and damage to the mold.

[0018] The buffer element is threadedly connected with the upward and downward movement plate, when the upward and downward movement cylinder lifts the upward and downward movement plate upward, the buffer element hits the upward and downward movement plate to achieve the purpose of buffering.

[0019] The second aspect of the present disclosure provides a method for operating a Marshall compactor, comprising the following steps:

[0020] Power on by manually pressing the switch button on the control unit, and set the number of compactions;

[0021] Press the start button, push the finger action, and push the thin rod into the hole on the movable plate. The hammer moves upward to the top end under the drive of the chain and triggers the stop sensor, and the chain stops moving;

[0022] Place the mold containing the mixture on the table plate and abut against the positioning block and the abutting part;

[0023] Manually press the start button on the control unit. The hammer falling will trigger the counting sensor, and the control unit starts counting. After the count reaches the set value, the compaction at one end of the mold is completed. The hammer moves upward to the top end under the drive of the chain and triggers the stop sensor, and the chain stops moving;

[0024] Manually press the push-out button on the control unit. The up-down movement cylinder pushes the movable joint and the up-down movement plate to move upward, separating the upper mold and the lower mold of the mold;

[0025] After turning the upper mold upside down by 180°, assemble it with the lower mold, place it on the table plate, abut against the positioning block and the abutting part, and manually press the start button on the control unit to compact the other end of the mold.

[0026] In summary, the present application has the following advantages:

[0027] 1. The use of the buffer assembly reduces the noise caused by the operation of the Marshall compactor, ensures the stability of the hammer falling process, and prolongs the service life of the hammer;

[0028] 2. The use of the cylinder force separates the upper and lower molds of the mold, saving manpower and improving the service life of the mold. The slide also facilitates the flow of the mold and prevents accidental falling of the mold;

[0029] 3. The hollow circular groove in the cylinder is filled with fine sand with different density from the cylinder. The inertia force generated by the fine sand and the cylinder at the moment of hammering is opposite, eliminating vibration and reducing noise;

[0030] 4. The positioning block can directly abut against the positioning block when the mold is placed manually, which is more convenient for personnel operation and improves work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0032] Figure 2 It is a front view of the overall structure of the present application;

[0033] Figure 3 is a full sectional view of the present application;

[0034] Figure 4 is Figure 2 a full sectional view of the hammer;

[0035] Figure 5 is a partial structural schematic view of the pushing mechanism of the present application.

[0036] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0037] 1, housing; 2, hammer; 3, hammer rod; 4, pushing assembly; 5, buffer assembly; 6, control unit; 7, separating assembly; 8, slide; 11, motor; 12, stop inductor; 13, counting inductor; 14, chain; 21, pushing finger; 22, hammer upper plate; 23, movable plate; 24, cylinder; 25, spring piece; 26, sealing ring; 27, sealing plate; 41, pushing cylinder; 42, abutting portion; 51, buffer base; 52, buffer cushion; 71, pushing mechanism; 72, mold; 73, table plate; 74, support rod; 711, up-and-down moving plate; 712, guide rod seat; 713, guide rod; 714, guide rod bearing; 715, buffer element; 716, positioning block; 717, separating plate; 718, movable joint; 719, up-and-down moving cylinder; 720, one-way valve; 721, upper mold; 722, lower mold. DETAILED DESCRIPTION

[0038] The advantages and features of the present application will be more easily understood by those skilled in the art through the following detailed description of the preferred embodiments of the present application, so that the scope of protection of the present application can be more clearly defined. Obviously, those skilled in the art can obtain the core idea and advantages of the present application by reading the description, and the application scenarios of the present application are not limited to the embodiments in the specification, and can be applied to different implementation methods. In addition, other details in the present application can also be appropriately modified and replaced without departing from the principle of the present application, and any other embodiments that do not require creative labor should belong to the scope of protection of the present application.

[0039] It should be noted that the drawings are only used for illustrative description and cannot be understood as limiting the present application. In order to better describe the embodiments, the drawings are generally given in a simplified form, and the details and dimensions in the drawings only apply to the present embodiments and do not represent a specific ratio.

[0040] Example 1

[0041] As Figure 1A new Marshall compactor, comprising a shell 1, a hammer 2, a rod 3, a push-out assembly 4, a buffer assembly 5, a control unit 6, a separation assembly 7 and a slide 8, the shell 1 is made of sheet metal to form the basic framework of the Marshall compactor, the hammer 2 is slidably connected with the rod 3, the hammer 2 slides up and down on the rod 3 to hit the buffer assembly 5, the buffer assembly 5 is installed on the separation assembly 7, the control unit 6 is on the side of the shell 1, and one end of the slide 8 is overlapped in front of the separation assembly 7 and the other end is in contact with the ground.

[0042] As a parallel solution of this embodiment, the shell 1 can be spliced by aluminum plates or steel plates to ensure stability and lightness of the shell 1.

[0043] Embodiment 2

[0044] As Figure 2 and Figure 3 A new Marshall compactor, the shell 1 comprises a motor 11, a stop sensor 12, a counting sensor 13 and a chain 14, the motor 11 is installed on the middle layer plate of the shell 1, the motor 11 is connected with the chain 14 through a sprocket, the chain 14 pulls the movable plate 23 to move upward, thereby driving the hammer 2 to move upward. The stop sensor 12 and the counting sensor 13 are installed on the shell 1, the counting sensor 13 is connected with the control unit 6, transmits the position information of the hammer 2 to the control unit 6, and adds 1 to the counting every time; the stop sensor 12 is connected with the control unit 6, transmits the position information of the hammer 2 to the control unit 6 to stop the movement of the chain 14, and clears the counting. When the hammer 2 needs to be hammered downward, the push-out finger 21 is retracted, so that the hammer 2 only allows the control unit 6 to add 1 to the counting after contacting the counting sensor 13, when the counting reaches the set value, the push-out finger 21 is extended, the hammer 2 and the rod 3 are lifted together, when the hammer 2 reaches the stop sensor 12, the motor 11 stops running at this moment, at this time, the buffer assembly 5 is separated from the mold 72, wherein the buffer assembly 5 comprises a buffer base 51 and a buffer cushion 52, the buffer base 51 is below the rod 3 and is threadedly connected with the rod 3, and there is a clamping groove above the buffer base 51, so that the rod 3 is clamped into the clamping groove to prevent the buffer base 51 from falling off during use.

[0045] Further, the mold 72 abuts against the abutting portion 42, and after completing the hitting process, the mold 72 is pushed out by the push-out cylinder 41 and slides down from the slide 8.

[0046] Embodiment 3

[0047] As Figure 4A new type of Marshall compactor, the hammer 2 also includes push out finger 21, hammer upper plate 22, movable plate 23, cylinder 24, spring 25, sealing ring 26 and sealing plate 27. Cylinder 24 has a hollow circular groove for placing fine sand with different density from cylinder 24 to offset the vibration and noise during the up and down movement of hammer 2. Push out finger 21 is threadedly connected with hammer upper plate 22, movable plate 23 has a circular hole located directly below push out finger 21 for the push out rod of push out finger 21 to move up and down to clasp movable plate 23 to move back and forth, so that hammer 2, hammer rod 3 and buffer assembly 5 move upward.

[0048] Further, the hollow circular groove of cylinder 24 can be filled with lead sand, fine gravel and plastic materials.

[0049] Example 4

[0050] As Figure 4 And Figure 5 A new type of Marshall compactor, the pushing mechanism 71 includes up and down movement plate 711, guide rod seat 712, guide rod 713, guide rod bearing 714, buffer element 715, positioning block 716, separation plate 717, movable joint 718, up and down movement cylinder 719 and one-way valve 720, positioning block 716 is above separation plate 717 for abutting against mold 72, buffer element 715 is installed on up and down movement plate 711 for buffering up and down movement cylinder 719 during its movement. When mold 72 needs to be turned over by 180°, push out finger 21 extends and claps movable plate 23 to make hammer 2 and hammer rod 3 rise, at the same time, up and down movement cylinder 719 rises to separate upper mold 721 from lower mold 722, which is convenient for personnel to turn over mold 72.

[0051] Further, one-way valve 720 is installed on the upper side of up and down movement cylinder 719 to prevent up and down movement cylinder 719 from keeping the current state after accidental air cut-off.

[0052] Example 5

[0053] As Figure 1 And Figure 2 A new type of Marshall compactor, separation assembly 7 also includes pushing mechanism 71, mold 72, table plate 73 and support rod 74. Mold 72 is placed on table plate 73, and support rod 74 is fixed to table plate 73 by screwing. Support rod 74 has threads at both ends to adjust the height and inclination of table plate. Pushing mechanism 71 is installed below table plate 73, which firstly avoids the contamination of mixed materials in the mold to the pushing mechanism 71, prolonging the service life of pushing mechanism 71. One end of slide 8 is fixed to table plate 73 and is made of thin sheet metal, so that mold 72 can easily slide into slide 8 from table plate 73 and slide down naturally.

[0054] In the description of the application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0055] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0056] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0058] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms must be directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0059] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A novel Marshall compactor, characterized in that, It includes a housing (1), a hammer (2), a striking rod (3), an ejection assembly (4), a buffer assembly (5), a control unit (6), a separation assembly (7), and a slide (8); The hammer (2) is slidably connected to the striking rod (3). The hammer (2) slides up and down on the striking rod (3) to strike the buffer assembly (5). The buffer assembly (5) includes a buffer base (51) and a buffer pad (52). The buffer pad (52) absorbs vibration and transmits the impact to the separation assembly (7). The buffer assembly (5) is located at the upper and lower ends of the striking rod (3) to reduce the noise caused by the hammer (2) falling or rising; the connection between the striking rod (3) and the buffer assembly (5) is a combination of threaded connection and plug-in connection, and the buffer assembly (5) is fixed with a nut screw. The outer casing (1) also includes a motor (11), a stop sensor (12), a counting sensor (13), and a chain (14). The motor (11) is connected to the chain (14), which drives the hammer (2) to move upward. The counting sensor (13) is connected to the control unit (6), which transmits the position information of the hammer (2) to the control unit (6) and increments the count by 1 each time. The stop sensor (12) is connected to the control unit (6), which transmits the position information of the hammer (2) to the control unit (6) to stop the chain (14) and reset the count to zero.

2. The novel Marshall compactor according to claim 1, characterized in that, The separation assembly (7) also includes a pushing mechanism (71), a mold (72), a platform (73) and a support rod (74); one end of the support rod (74) is threaded to the platform (73) and the other end is threaded to the bottom of the outer shell (1).

3. The novel Marshall compactor according to claim 2, characterized in that, The ejection assembly (4) also includes an ejection cylinder (41) and a stop part (42), and the ejection assembly (4) is connected to the platform (73); the arc part of the stop part (42) abuts against the mold (72), and the mold (72) can be ejected freely, and the mold (72) flows to its bottom through the slide (8); the mold (72) also includes an upper mold (721) and a lower mold (722), and the upper mold (721) and the lower mold (722) are connected by insertion; one end of the slide (8) is threaded to the outer shell (1), and the other end abuts against the ground.

4. The novel Marshall compactor according to claim 3, characterized in that, The hammer (2) also includes a push-out finger (21), a hammer upper plate (22), a movable plate (23), a cylinder (24), a spring (25), a sealing ring (26), and a sealing plate (27); the cylinder (24) has a hollow circular groove for inserting fine sand with a density different from that of the cylinder (24) to counteract the vibration and noise during the up-and-down movement of the hammer (2); the push-out finger (21) is threadedly connected to the hammer upper plate (22); the movable plate (23) has a circular hole located directly below the push-out finger (21) for the push-out rod of the push-out finger (21) to move in the up-and-down direction to lock the movable plate (23) to move back and forth, so that the hammer (2), the hammer rod (3), and the buffer assembly (5) move upward.

5. The novel Marshall compactor according to claim 4, characterized in that, The pushing mechanism (71) also includes an upper and lower moving plate (711), a guide rod seat (712), a guide rod (713), a guide rod bearing (714), a buffer element (715), a positioning block (716), a separation plate (717), a movable joint (718), an upper and lower moving cylinder (719), and a one-way valve (720). The guide rod seat (712) is threadedly connected to the upper and lower moving plates (711), the guide rod (713) passes through the guide rod seat (712) and abuts against the upper and lower moving plates (711), and the guide rod (713) is slidably connected to the guide rod bearing (714); The positioning block (716) is located above the separation plate (717) and is threadedly connected to the separation plate (717) for the mold (72) to abut against the positioning block (716) after it is placed in. One end of the movable joint (718) is threaded to the upper and lower moving plates (711), and the other end is threaded to the upper and lower moving cylinder (719). The upper and lower moving cylinder (719) pushes the movable joint (718) and the upper and lower moving plates (711) to move up and down. One of the air inlets on the upper and lower moving cylinder (719) is threaded to a one-way valve (720) to prevent the upper and lower moving cylinder (719) from running unstablely due to a sudden loss of air supply, which could damage the mold (72). The buffer element (715) is threadedly connected to the upper and lower moving plates (711). When the upper and lower moving cylinder (719) lifts the upper and lower moving plates (711) upward, the buffer element (715) impacts the upper and lower moving plates (711) to achieve the purpose of buffering.

6. A method for operating the novel Marshall compactor as described in claim 5, characterized in that, Includes the following steps: Manually press the switch button on the control unit (6) to turn on the power and set the number of compaction times; Press the start button, push out the finger (21) action, push out the thin rod and slide it into the hole on the movable plate (23). The hammer (2) moves upward to the top under the drive of the chain and triggers the stop sensor (12), and the chain stops moving. Place the mold (72) containing the mixture on the table (73) and abut it against the positioning block (716) and the abutment part (42); When the start button on the control unit (6) is pressed manually, the hammer (2) will fall and trigger the counting sensor (13). The control unit (6) will start counting. When the count reaches the set value, the compaction of one end face of the mold (72) will be completed. The hammer (2) will move upward to the top under the drive of the chain and trigger the stop sensor (12). The chain will stop moving. Manually press the push button on the control unit (6), and the up-and-down movement cylinder (719) pushes the movable joint (718) and the up-and-down movement plate (711) upward to separate the upper mold (721) and lower mold (722) of the mold (72); After the upper mold (721) is rotated 180° up and down and assembled with the lower mold (722), it is placed on the platform (73) and abutted against the positioning block (716) and the abutting part (42). The start button on the control unit (6) is manually pressed to compact the other end face of the mold (72).

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