Low-noise marshall compactor

Abstract

The utility model relates to engineering detection equipment technical field discloses a low noise nature marshall compaction instrument, including support board, the lower part of support board front end outer wall is provided with sound absorption mechanism, the sound absorption mechanism includes small high pressure air pump and processing platform, the output fixedly connected with gas pipe of small high pressure air pump, the outer wall fixedly connected with gas pressure sensor of gas pipe. In the utility model, the marshall compaction instrument is provided with hammering mechanism, under the transmission of servo motor, when the fan gear lifts the guide column to the suitable height, will fall because the position that the fan gear vacates, make the hammering block and the material in the hammering shell contact, thereby ensure that the height and the length of time of every impact are consistent, significantly improve the repeatability and reliability of test, cooperate the guidance of guide sliding block and reduce the possibility that the guide column deviates, thereby guarantee the position and the strength of impact consistently, reduce the noise caused by slight deviation.

Description

Technical Field

[0001] This utility model relates to the field of engineering testing equipment technology, and in particular to a low-noise Marshall compaction apparatus. Background Technology

[0002] The Marshall compactor is a testing device specifically used in geotechnical testing. It is mainly used to evaluate the compaction performance of soil and determine reasonable compaction parameters. By simulating the compaction process at the construction site, it uses a hammer with a certain amount of energy to compact the soil sample and measure parameters such as soil load and density to ensure the engineering quality of the soil.

[0003] However, traditional devices typically employ a single sound insulation and noise reduction structure, which cannot effectively absorb or block the noise generated during impact. This results in a noisy operating environment, affecting the comfort of personnel. Furthermore, they cannot absorb the vibrations generated by the impact, allowing these vibrations to be directly transmitted to the equipment and surrounding structures. The vibration amplitude is large, difficult to control, and easily leads to the spread of noise and vibration.

[0004] Therefore, those skilled in the art have provided a low-noise Marshall compactor to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a low-noise Marshall compactor. This Marshall compactor is equipped with a sound-absorbing mechanism. Under the action of an air cushion and a buffer spring, it buffers and absorbs the impact vibrations received by the support plate after being restricted by the first threaded rod, thereby reducing the direct transmission of impact vibrations. This reduces noise while also reducing the propagation of mechanical vibrations. In conjunction with the detection of a pressure sensor, a small high-pressure air pump can maintain and replenish the air pressure in the air cushion, preventing air pressure drops from affecting the buffering performance and ensuring that the force of each impact is more uniform and controllable. This avoids detection errors caused by excessive or unstable vibrations. Furthermore, the sound-absorbing blocks, sound-absorbing cotton, and air further reduce the absorption and blocking of sound waves generated by the impact, reducing noise emission during operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A low-noise Marshall compactor includes a support plate. A sound-absorbing mechanism is provided on the lower part of the outer wall of the front end of the support plate. The sound-absorbing mechanism includes a small high-pressure air pump and a processing platform. An air supply pipe is fixedly connected to the output end of the small high-pressure air pump. An air pressure sensor is fixedly connected to the outer wall of the air supply pipe. A hammer shell is fixedly connected to the front end of the upper surface of the processing platform. A cavity is opened inside the hammer shell. A sound-absorbing block is fixedly connected to the inner wall of the hammer shell. Sound-absorbing cotton is fixedly connected inside the sound-absorbing block. A support plate is slidably connected to the middle of the inner wall of the hammer shell. A first threaded rod is fixedly connected to the center of the lower surface of the support plate. Two first locking nuts are threadedly engaged at the lower end of the outer wall of the first threaded rod. An air cushion is fixedly connected to the middle of the lower surface of the support plate. Buffer springs are fixedly connected to the perimeter of the lower surface of the support plate.

[0008] A hammering mechanism is provided on the upper part of the front outer wall of the support plate. The hammering mechanism includes a housing. A placement frame is fixedly connected to the lower part of the front end of the inner wall of the housing. A servo motor is fixedly connected to one side of the rear outer wall of the placement frame. A transmission groove is opened inside the front end of the placement frame. Transmission gears are rotatably connected to both sides of the middle of the rear inner wall of the transmission groove. Fixed shafts are rotatably connected to both sides of the rear inner wall of the placement frame. A connecting gear is fixedly connected to the front end of the outer wall of the fixed shaft. A sector gear is fixedly connected to the middle of the outer wall of the fixed shaft. Guide sliders are fixedly connected to the middle of the front and rear inner walls of the placement frame. Guide columns are slidably connected to the inner walls of the guide sliders.

[0009] The outer walls of the front and rear ends of the guide post are provided with guide grooves, and the outer walls on both sides of the guide post are provided with toothed grooves. A hammer block is fixedly connected to the lower surface of the guide post, and a hammer block is engaged with the middle of the lower surface of the hammer block. A pressure sensor is fixedly connected to the center of the inner top surface of the hammer block.

[0010] Through the above technical solution, the Marshall compactor is equipped with a hammering mechanism. Under the drive of the servo motor, when the sector gear raises the guide column to a suitable height, it will fall due to the empty space of the sector gear, so that the hammering block contacts the material inside the hammering shell. This ensures that the height and duration of each impact are consistent, significantly improving the repeatability and reliability of the test. In conjunction with the guidance of the guide slider, the possibility of the guide column shifting is reduced, thereby ensuring that the position and force of the impact are consistent and reducing noise caused by slight deviations.

[0011] Furthermore, the small high-pressure air pump is fixedly connected to the lower part of the outer wall of the rear end of the support plate, and the end of the air supply pipe away from the small high-pressure air pump is fixedly connected to the air cushion.

[0012] The above technical solution enables a small high-pressure air pump to work with a pressure sensor to adjust the pressure value inside the air cushion to a preset range.

[0013] Furthermore, the processing table is fixedly connected to the lower end of the middle of the front outer wall of the support plate, the first threaded rod is slidably connected to the processing table, and multiple support blocks are fixedly connected to the rear end of the lower surface of the processing table;

[0014] The above technical solution enables the processing table to be securely fixed to the support plate by the support block, so that the user can adjust the height of the pallet inside the hammer housing by adjusting the first locking nut on the first threaded rod.

[0015] Furthermore, the lower end of the buffer spring is fixedly connected to the inner bottom surface of the hammer shell, and the lower end of the air cushion is fixedly connected to the inner bottom surface of the hammer shell.

[0016] The above technical solution enables the buffer spring and air cushion to absorb the impact force on the pallet, reducing noise caused by vibration.

[0017] Furthermore, the outer shell is fixedly connected to the upper end of the middle of the front outer wall of the support plate, a storage shell is fixedly connected to the front end of the upper surface of the outer shell, and a door panel is hinged to the front end of the inner wall of the outer shell.

[0018] The above technical solution allows users to adjust the hammering mechanism by opening the door panel.

[0019] Furthermore, the output end of the servo motor is fixedly connected to the fixed shaft on one side, the transmission gear meshes with the connecting gear, and the sector gear meshes with the tooth groove;

[0020] The above technical solution enables the servo motor to control two sector gears to rotate synchronously in opposite directions, thereby controlling the guide column to rise in height.

[0021] Furthermore, a placement plate is fixedly connected to the upper surface of the guide post, and first positioning blocks are fixedly connected to both sides of the middle part of the upper surface of the placement plate. A second threaded rod is fixedly connected to the center of the upper surface of the placement plate. Multiple counterweights are engaged with the lower end of the outer wall of the second threaded rod. Second positioning blocks are fixedly connected to both sides of the middle part of the upper surface of the counterweights. Positioning grooves are opened on both sides of the middle part of the lower surface of the counterweights. A second locking nut is threaded into the middle part of the outer wall of the second threaded rod.

[0022] The above technical solution enables users to adjust the impact force generated by hammering by installing an appropriate number of counterweights. The first and second positioning blocks are interlocked with the positioning grooves to splice and install the counterweights.

[0023] Furthermore, a base is fixedly connected to the lower surface of the support plate, and a control cabinet is fixedly connected to the upper part of the rear outer wall of the support plate.

[0024] The above technical solution enables the device to perform preset operations on the equipment by setting up a control cabinet.

[0025] This utility model has the following beneficial effects:

[0026] 1. This utility model proposes a low-noise Marshall compactor. Compared with most traditional Marshall compactors, this Marshall compactor is equipped with a sound-absorbing mechanism. Under the action of the air cushion and buffer spring, it buffers and absorbs the impact vibration of the support plate after being restricted by the first threaded rod, thereby reducing the direct transmission of impact vibration. In addition, it reduces the propagation of mechanical vibration while reducing noise. With the detection of the air pressure sensor, the small high-pressure air pump can maintain and replenish the air pressure in the air cushion, avoiding the impact of air pressure drop on the buffering performance, ensuring that the force of each impact is more uniform and controllable, thereby avoiding detection errors caused by excessive or unstable vibration. Furthermore, the sound absorption block, sound absorption cotton and air isolation further reduce the absorption and blockage of sound waves generated by the impact, reducing noise emission during operation.

[0027] 2. This utility model proposes a low-noise Marshall compactor. Compared with most traditional Marshall compactors, this Marshall compactor is equipped with a hammering mechanism. Under the drive of a servo motor, when the sector gear raises the guide column to a suitable height, it will fall due to the space left by the sector gear, causing the hammering block to contact the material inside the hammering shell. This ensures that the height and duration of each impact are consistent, significantly improving the repeatability and reliability of the test. In conjunction with the guidance of the guide slider, the possibility of the guide column shifting is reduced, thereby ensuring consistent impact position and force and reducing noise caused by slight shifts. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a low-noise Marshall compactor proposed in this utility model;

[0029] Figure 2 This is a schematic diagram of the outer shell structure of a low-noise Marshall compactor proposed in this utility model;

[0030] Figure 3 This is a schematic diagram of a small high-pressure air pump structure for a low-noise Marshall compactor proposed in this utility model.

[0031] Figure 4 This is a schematic diagram of the processing table structure of a low-noise Marshall compactor proposed in this utility model.

[0032] Figure 5This is a schematic diagram of the sound-absorbing mechanism of a low-noise Marshall compactor proposed in this utility model;

[0033] Figure 6 This is a schematic diagram of the counterweight structure of a low-noise Marshall compactor proposed in this utility model;

[0034] Figure 7 This is a schematic diagram of the placement frame structure of a low-noise Marshall compactor proposed in this utility model;

[0035] Figure 8 This is a schematic diagram of the guide column structure of a low-noise Marshall compactor proposed in this utility model;

[0036] Figure 9 This is a schematic diagram of the hammer block structure of a low-noise Marshall compactor proposed in this utility model.

[0037] Legend:

[0038] 1. Support plate;

[0039] 2. Sound absorption mechanism; 201. Small high-pressure air pump; 202. Air pressure sensor; 203. Air supply pipe; 204. Processing table; 205. Support block; 206. Hammer shell; 207. Cavity; 208. Sound-absorbing block; 209. Sound-absorbing cotton; 2010. Support plate; 2011. First threaded rod; 2012. First locking nut; 2013. Air cushion; 2014. Buffer spring;

[0040] 3. Hammering mechanism; 301. Outer shell; 302. Storage shell; 303. Door panel; 304. Placement rack; 305. Servo motor; 306. Transmission groove; 307. Transmission gear; 308. Fixed shaft; 309. Connecting gear; 3010. Sector gear; 3011. Guide slider; 3012. Guide column; 3013. Placement plate; 3014. First positioning block; 3015. Second threaded rod; 3016. Counterweight block; 3017. Second positioning block; 3018. Positioning groove; 3019. Second locking nut; 3020. Guide slide groove; 3021. Tooth groove; 3022. Hammering block; 3023. Hammering clamp; 3024. Pressure sensor;

[0041] 4. Base; 5. Control cabinet. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] One embodiment of this utility model is provided:

[0044] Reference Figure 1 , 2 3. A low-noise Marshall compactor includes a support plate 1. A sound-absorbing mechanism 2 is provided on the lower part of the outer wall of the front end of the support plate 1. The sound-absorbing mechanism 2 includes a small high-pressure air pump 201 and a processing table 204. An air supply pipe 203 is fixedly connected to the output end of the small high-pressure air pump 201. A pressure sensor 202 is fixedly connected to the outer wall of the air supply pipe 203. A hammer shell 206 is fixedly connected to the front end of the upper surface of the processing table 204. A cavity 207 is opened inside the hammer shell 206. The inner wall of the hammer shell 206... A sound-absorbing block 208 is fixedly connected, and a sound-absorbing cotton 209 is fixedly connected inside the sound-absorbing block 208. A support plate 2010 is slidably connected to the middle of the inner wall of the hammer shell 206. A first threaded rod 2011 is fixedly connected to the center of the lower surface of the support plate 2010. Two first locking nuts 2012 are threadedly engaged at the lower end of the outer wall of the first threaded rod 2011. An air cushion 2013 is fixedly connected to the middle of the lower surface of the support plate 2010. A buffer spring 2014 is fixedly connected to the perimeter of the lower surface of the support plate 2010.

[0045] A hammering mechanism 3 is provided on the upper part of the front outer wall of the support plate 1. The hammering mechanism 3 includes a housing 301. A placement frame 304 is fixedly connected to the lower part of the front end of the inner wall of the housing 301. A servo motor 305 is fixedly connected to one side of the rear outer wall of the placement frame 304. A transmission groove 306 is opened inside the front end of the placement frame 304. Transmission gears 307 are rotatably connected to both sides of the middle of the rear inner wall of the transmission groove 306. Fixed shafts 308 are rotatably connected to both sides of the rear inner wall of the placement frame 304. A connecting gear 309 is fixedly connected to the front end of the outer wall of the fixed shaft 308. A sector gear 3010 is fixedly connected to the middle of the outer wall of the fixed shaft 308. Guide sliders 3011 are fixedly connected to the middle of the front and rear inner walls of the placement frame 304. Guide columns 3012 are slidably connected to the inner wall of the guide slider 3011.

[0046] Guide grooves 3020 are provided on the outer walls of the front and rear ends of the guide post 3012, and toothed grooves 3021 are provided on the outer walls of both sides of the guide post 3012. A hammer block 3022 is fixedly connected to the lower surface of the guide post 3012. A hammer clamping block 3023 is engaged in the middle of the lower surface of the hammer block 3022. A pressure sensor 3024 is fixedly connected to the center of the inner top surface of the hammer block 3022. The Marshall compactor is equipped with a hammering mechanism 3. Under the drive of the servo motor 305, when the sector gear 3010 raises the guide post 3012 to a suitable height, it will fall due to the position vacated by the sector gear 3010, so that the hammer clamping block 3023 contacts the material inside the hammer shell 206, thereby ensuring that the height and duration of each impact are consistent, significantly improving the repeatability and reliability of the test. With the guidance of the guide slider 3011, the possibility of the guide post 3012 deviating is reduced, thereby ensuring that the position and force of the impact are consistent and reducing noise caused by slight deviations.

[0047] Reference Figure 3 , 4 5. A small high-pressure air pump 201 is fixedly connected to the lower part of the outer wall of the rear end of the support plate 1. The end of the air supply pipe 203 away from the small high-pressure air pump 201 is fixedly connected to the air cushion 2013, so that the small high-pressure air pump 201 can work with the air pressure sensor 202 to adjust the pressure value in the air cushion 2013 to a preset range. The processing table 204 is fixedly connected to the lower end of the middle of the outer wall of the front end of the support plate 1. The first threaded rod 2011 is slidably connected to the processing table 204. Multiple support blocks 205 are fixedly connected to the rear end of the lower surface of the processing table 204, so that the processing table 204... 4. The support block 205 can be fixed relatively stably on the support plate 1, so that the user can adjust the height of the support plate 2010 inside the hammer shell 206 by adjusting the first locking nut 2012 on the first threaded rod 2011. The lower end of the buffer spring 2014 is fixedly connected to the inner bottom surface of the hammer shell 206, and the lower end of the air cushion 2013 is fixedly connected to the inner bottom surface of the hammer shell 206, so that the buffer spring 2014 and the air cushion 2013 can absorb the impact force on the support plate 2010 and reduce the noise caused by vibration.

[0048] Reference Figure 6 , 78. The outer shell 301 is fixedly connected to the upper end of the middle of the outer wall of the front end of the support plate 1. The front end of the upper surface of the outer shell 301 is fixedly connected to the storage shell 302. The front end of the inner wall of the outer shell 301 is hinged to the door panel 303, so that the user can adjust the hammering mechanism 3 by opening the door panel 303. The output end of the servo motor 305 is fixedly connected to the fixed shaft 308 on one side. The transmission gear 307 meshes with the connecting gear 309. The sector gear 3010 meshes with the tooth groove 3021, so that the servo motor 305 can control the two sector gears 3010 to rotate synchronously in opposite directions to control the guide column 3012 to be raised in height.

[0049] Reference Figure 6 , 8 9. A placement plate 3013 is fixedly connected to the upper surface of the guide post 3012. First positioning blocks 3014 are fixedly connected to both sides of the middle portion of the upper surface of the placement plate 3013. A second threaded rod 3015 is fixedly connected to the center of the upper surface of the placement plate 3013. Multiple counterweights 3016 are engaged with the lower end of the outer wall of the second threaded rod 3015. Second positioning blocks 3017 are fixedly connected to both sides of the middle portion of the upper surface of the counterweights 3016. Positioning grooves 3018 are formed on both sides of the middle portion of the lower surface of the counterweights 3016. The second threaded rod 3014... The middle of the outer wall of the 15 is threaded with a second locking nut 3019, which allows the user to adjust the impact force generated by the hammer by installing an appropriate number of counterweights 3016. The first positioning block 3014 and the second positioning block 3017 are engaged with the positioning groove 3018 to splice and install the position of the counterweights 3016. The lower surface of the support plate 1 is fixedly connected to the base 4, and the upper part of the rear outer wall of the support plate 1 is fixedly connected to the control cabinet 5. By setting the control cabinet 5, the device can perform preset operation on the equipment.

[0050] Working principle: After connecting to an external power source, the required electronic components can be installed in the control cabinet 5. The material to be tested is placed on the tray 2010 inside the hammer housing 206. By rotating the first locking nut 2012, the height of the tray 2010 can be stably adjusted under the connection of the buffer spring 2014. With the detection of the air pressure sensor 202 (MPL115A2 model), the small high-pressure air pump 201 (Bostitch model) can adjust the air pressure in the air cushion 2013 to a preset range, so that the tray 2010 can absorb the impact relatively stably. Furthermore, the servo motor 30... Driven by 5 and driven by gear meshing, the sector gear 3010 can rotate synchronously. When meshing with the tooth groove 3021 (the sector gear 3010 has fewer teeth than the tooth groove 3021, which allows the sector gear 3010 to re-mesh after the guide post 3012 falls), the guide post 3012 is raised to a specified height. When the sector gear 3010 rotates to the toothless empty space, the guide post 3012, along with the hammer block 3022, hammers the material inside the hammer shell 206. The user can adjust the impact force by installing a fixed number of counterweights 3016. The pressure sensor 3024 facilitates the detection of the impact force.

[0051] The following points should be noted in this article:

[0052] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0053] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-noise Marshall compactor, comprising a support plate, characterized in that: A sound-absorbing mechanism is provided on the lower part of the outer wall of the front end of the support plate. The sound-absorbing mechanism includes a small high-pressure air pump and a processing table. The output end of the small high-pressure air pump is fixedly connected to an air supply pipe. An air pressure sensor is fixedly connected to the outer wall of the air supply pipe. A hammer shell is fixedly connected to the front end of the upper surface of the processing table. A cavity is opened inside the hammer shell. A sound-absorbing block is fixedly connected to the inner wall of the hammer shell. Sound-absorbing cotton is fixedly connected inside the sound-absorbing block. A support plate is slidably connected to the middle of the inner wall of the hammer shell. A first threaded rod is fixedly connected to the center of the lower surface of the support plate. Two first locking nuts are threadedly engaged at the lower end of the outer wall of the first threaded rod. An air cushion is fixedly connected to the middle of the lower surface of the support plate. Buffer springs are fixedly connected to the four sides of the lower surface of the support plate. A hammering mechanism is provided on the upper part of the front outer wall of the support plate. The hammering mechanism includes a housing. A placement frame is fixedly connected to the lower part of the front end of the inner wall of the housing. A servo motor is fixedly connected to one side of the rear outer wall of the placement frame. A transmission groove is opened inside the front end of the placement frame. Transmission gears are rotatably connected to both sides of the middle of the rear inner wall of the transmission groove. Fixed shafts are rotatably connected to both sides of the rear inner wall of the placement frame. A connecting gear is fixedly connected to the front end of the outer wall of the fixed shaft. A sector gear is fixedly connected to the middle of the outer wall of the fixed shaft. Guide sliders are fixedly connected to the middle of the front and rear inner walls of the placement frame. Guide columns are slidably connected to the inner walls of the guide sliders. The outer walls of the front and rear ends of the guide post are provided with guide grooves, and the outer walls on both sides of the guide post are provided with toothed grooves. A hammer block is fixedly connected to the lower surface of the guide post, and a hammer block is engaged with the middle of the lower surface of the hammer block. A pressure sensor is fixedly connected to the center of the inner top surface of the hammer block.

2. The low-noise Marshall compactor according to claim 1, characterized in that: The small high-pressure air pump is fixedly connected to the lower part of the outer wall of the rear end of the support plate, and the end of the air supply pipe away from the small high-pressure air pump is fixedly connected to the air cushion.

3. The low-noise Marshall compactor according to claim 1, characterized in that: The processing table is fixedly connected to the lower end of the middle of the front outer wall of the support plate. The first threaded rod is slidably connected to the processing table. Multiple support blocks are fixedly connected to the rear end of the lower surface of the processing table.

4. A low-noise Marshall compactor according to claim 1, characterized in that: The lower end of the buffer spring is fixedly connected to the inner bottom surface of the hammer shell, and the lower end of the air cushion is fixedly connected to the inner bottom surface of the hammer shell.

5. A low-noise Marshall compactor according to claim 1, characterized in that: The outer shell is fixedly connected to the upper end of the middle of the front outer wall of the support plate. A storage shell is fixedly connected to the front end of the upper surface of the outer shell, and a door panel is hinged to the front end of the inner wall of the outer shell.

6. A low-noise Marshall compactor according to claim 1, characterized in that: The output end of the servo motor is fixedly connected to the fixed shaft on one side, the transmission gear meshes with the connecting gear, and the sector gear meshes with the tooth groove.

7. A low-noise Marshall compactor according to claim 1, characterized in that: A placement plate is fixedly connected to the upper surface of the guide post. First positioning blocks are fixedly connected to both sides of the middle part of the upper surface of the placement plate. A second threaded rod is fixedly connected to the center of the upper surface of the placement plate. Multiple counterweights are engaged with the lower end of the outer wall of the second threaded rod. Second positioning blocks are fixedly connected to both sides of the middle part of the upper surface of the counterweights. Positioning grooves are opened on both sides of the middle part of the lower surface of the counterweights. A second locking nut is threaded into the middle part of the outer wall of the second threaded rod.

8. A low-noise Marshall compactor according to claim 1, characterized in that: A base is fixedly connected to the lower surface of the support plate, and a control cabinet is fixedly connected to the upper part of the outer wall of the rear end of the support plate.

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