CN212904126U

CN212904126U - Large-scale pneumatic surface vibration appearance

Info

Publication number: CN212904126U
Application number: CN202021349012.2U
Authority: CN
Inventors: 车维斌; 谭小军; 刘登贵
Original assignee: Sinohydro Bureau 5 Co Ltd
Current assignee: Sinohydro Bureau 5 Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-04-06
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses a large-scale pneumatic surface vibration instrument, which comprises a base frame; the test cylinder is arranged at the bottom of the base frame; the cylinder is arranged at the upper part of the base frame, the fixed end of the cylinder is connected with the base frame, and the movable end of the cylinder is connected with the fixed frame; the pneumatic vibrator is arranged above the test tube and below the fixing frame; the pneumatic vibrator is connected with the fixed frame through a sling, and the bottom of the pneumatic vibrator is connected with a tamping plate; the air cylinder and the pneumatic vibrator are both communicated with air supply equipment. The beneficial effects of the utility model include: firstly, the pneumatic vibrator has low noise, can improve the test environment, saves electricity and saves cost; secondly, the equipment can be correspondingly adjusted according to the characteristics of different materials so as to meet the requirements of different materials; thirdly, the power source is more stable, and after the power is cut off suddenly, the gas supply equipment can still work for a period of time, so that the precision of test detection and the accuracy of data can be ensured; fourthly, the efficiency is high, and the cost is controllable.

Description

Large-scale pneumatic surface vibration appearance

Technical Field

The utility model relates to a maximum dry density test instrument, concretely relates to large-scale pneumatic surface vibration appearance.

Background

The compaction quality of the coarse-grained soil subgrade has no clear control index or detection method, and the compaction degree is common. The degree of compaction is the ratio of the dry density of the construction site to the maximum dry density indoors. The definition of the degree of compaction shows that the maximum dry density of the filler and the actual dry density measured on site are needed to obtain the degree of compaction. The maximum dry density refers to the peak value of the dry density of the soil changing along with the water content under a certain compaction function; or the dry density corresponding to the peak point on the relation curve of the dry density and the water content obtained by the compaction test. The maximum dry density increases with the increase of the compaction function, and the value of the maximum dry density is related to the type of soil, compaction energy and the like; after the compaction test is confirmed, the obtained product is used as a preliminary index of the compaction degree of the filled soil.

The method for measuring the maximum dry density of coarse-grained soil includes a compaction method and a vibration method. The test curve of the compaction test method for determining the maximum dry density of the soil-stone mixture containing stones or gravels with larger grain sizes is mostly multimodal or has no significant peak value, which indicates that the method is not the most suitable test method for coarse-grained soil, and the "maximum dry density" determined by the compaction method is often lower than the result of the vibration compaction test. Therefore, the method for measuring the maximum dry density of the non-sticky coarse-grained soil has better measuring effect by using a vibration method. The regulations of the highway geotechnical test regulations are as follows: the standard dry density of coarse-grained soil and giant-grained soil is determined by adopting a vibration table method and a surface vibrator method. The oscillating table method, also called a plane oscillating press molding method, is performed on a mechanical oscillating table most commonly used indoors, and is widely used. In practice, the vibrating device is vibrating from bottom to top, exactly opposite to the compacting process. The surface vibrator method is also called vibration ramming method, and can simulate the working condition of on-site vibration road roller on the surface of material, and can utilize frequency converter to regulate rotating angular speed of eccentric motor to obtain different compacting (exciting) frequencies, and at the same time can utilize regulation of eccentric mass to produce different centrifugal forces so as to make the nominal amplitude of the whole vibration exciter change, so that the vibration condition of vibration road roller can be simulated.

China is in a new round of high tide of hydropower development at present, and enterprises continuously improve the construction technical level of the enterprises and the culture and storage of technical talents in order to improve the market competitiveness. Due to the progress of construction equipment and technology, the construction process and equipment are more and more advanced; the traditional construction process and equipment can not meet the requirements of economic social development. Laboratories for hydraulic and hydroelectric engineering, roads and the like relate to maximum dry density tests, and generally adopt a traditional surface vibration instrument which has high noise and poor working environment of personnel and endangers occupational health; on the other hand, researchers find that the maximum dry density of the material cannot be achieved by adopting the traditional surface vibration meter due to the material property of partial materials, such as inviscid free-drainage soil, and finally the test result of the relative density of the material is directly influenced. On the other hand, the traditional equipment adopts electricity to provide power, and sudden power failure can affect the equipment and test results.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a large-scale pneumatic surface vibration appearance for the measurement of the biggest dry density of change and solution like inviscid free drainage soil can avoid having a power failure to the adverse effect that the experiment brought suddenly simultaneously.

For solving the technical problem, the utility model discloses the technical scheme who adopts does:

a large-scale pneumatic surface vibration meter comprises a base frame; the test cylinder is arranged at the bottom of the base frame; the cylinder is arranged at the upper part of the base frame, the fixed end of the cylinder is connected with the base frame, and the movable end of the cylinder is connected with the fixed frame; the pneumatic vibrator is arranged above the test tube and below the fixing frame; the pneumatic vibrator is connected with the fixed frame through a sling, and the bottom of the pneumatic vibrator is connected with a tamping plate; the air cylinder and the pneumatic vibrator are both communicated with air supply equipment.

As a further technical scheme of the above scheme, the pedestal comprises a base, a column, a beam and an upper beam; the plurality of upright posts are vertically connected to the base, the upper beam is connected to the tops of the plurality of upright posts, and the cross beam is detachably connected to the upper parts of the plurality of upright posts through the locking mechanism; the base is arranged on the test cylinder, the fixed end of the air cylinder is connected with the cross beam, and the pneumatic vibrator is arranged below the cross beam.

According to a further technical scheme of the scheme, the number of the cylinders is two, the two cylinders are vertically arranged above the cross beam in parallel, fixed ends of the bottoms of the two cylinders are connected with the cross beam, and the fixed frame is connected to movable ends of the tops of the two cylinders; the sling is positioned between the two cylinders.

As a further technical scheme of the above scheme, the top of the pneumatic vibrator is connected with a vertically arranged guide rod, and the cross beam is provided with a guide hole for the guide rod to pass through; the top end of the guide rod is connected with the fixed frame through the sling.

As a further technical scheme of the scheme, a fixed protection frame is arranged on the base, and the test tube is arranged in the fixed protection frame.

As a further technical scheme of the scheme, the air supply device also comprises a control cabinet, wherein the air supply device is arranged in the control cabinet; the control cabinet is provided with a gas supply controller.

As a further technical scheme of the above scheme, a limit switch is arranged at the position of the bottom of the cross beam corresponding to the pneumatic vibrator; the limit switch is connected with the air supply controller.

As a further technical scheme of the above scheme, a timer is further arranged on the control cabinet; the timer is connected with the air supply controller.

As a further technical scheme of the above scheme, a power indicator, a power switch button, an emergency stop button and a stop button are further arranged on the control cabinet; the air supply controller also comprises an air pressure controller used for controlling the air pressure of the air supply equipment, and an ascending button and a descending button used for controlling the expansion of the air cylinder.

Compared with the prior art, the utility model, following advantage and beneficial effect have: firstly, the pneumatic vibrator has low noise, can improve the test environment, saves electricity and saves cost; secondly, the equipment can be correspondingly adjusted according to the characteristics of different materials so as to meet the requirements of different materials; thirdly, the power source is more stable, and after the power is cut off suddenly, the gas supply equipment can still work for a period of time, so that the precision of test detection and the accuracy of data can be ensured; fourthly, the efficiency is high, and the cost is controllable.

Drawings

Fig. 1 is a schematic structural diagram of the main structure of the present invention.

Fig. 2 is a schematic structural diagram of the control cabinet of the present invention.

The explanation of each reference number in the figure is: the device comprises a base 1, a stand column 2, a cross beam 3, a locking mechanism 4, an upper beam 5, a test tube 6, a fixed protection frame 7, a tamping plate 8, a pneumatic vibrator 9, an air inlet 10, a limit switch 11, an air cylinder 12, a guide rod 13, a sling 14, a fixed frame 15, a control cabinet 16, an air pressure controller 17, a timer 18, a power indicator lamp 19, a power switch 20, an emergency stop 21, an ascending 22, a descending 23 and a stopping 24.

Detailed Description

The following detailed description of the present invention will be provided in order to further understand the concept of the present invention, the technical problems, the technical features constituting the technical solutions, and the technical effects brought by the technical features of the present invention, which are described in the following with reference to the accompanying drawings. However, the description of the embodiments is illustrative and not intended to limit the present invention.

A large-scale pneumatic surface vibration appearance include major structure and switch board 16.

The main structure comprises a base frame, a test tube 6, a pneumatic vibrator 9 and a cylinder 12. The test tube 6 is arranged at the bottom of the base frame. The cylinder 12 is arranged on the upper part of the base frame, the fixed end of the cylinder 12 is connected with the base frame, and the movable end of the cylinder 12 is connected with the fixed frame 15. The pneumatic vibrator 9 is arranged above the test tube 6 and below the fixing frame 15. The pneumatic vibrator 9 is connected with the fixed frame 15 through a sling 14, and the bottom of the pneumatic vibrator 9 is connected with the tamping plate 8 through a bolt. The cylinder 12 and the pneumatic vibrator 9 are both in communication with an air supply device. The pneumatic vibrator 9 adopts a QZD-80 pneumatic vibrator which can be adjusted according to actual requirements.

The pedestal comprises a base 1, a vertical column 2, a cross beam 3 and an upper beam 5. The base 1 is made of a steel plate with the thickness of 5cm, and the length, the width and the height of the base are 86cm, 40cm and 5 cm. The upright post 2 is processed by round steel with the diameter of 5cm and the height of 158 cm. The cross beam 3 and the upper beam 5 are both processed by steel plates with the thickness of 5cm, and the length, the width and the height are 90cm, 10cm and 5 cm. A plurality of stands 2 are vertical to be welded on base 1, and upper beam 5 welds in a plurality of 2 tops of stands, and crossbeam 3 passes through locking mechanism 4 detachably to be connected in the upper portion of a plurality of stands 2. The test tube 6 is arranged on the base 1, the fixed end of the air cylinder 12 is connected with the cross beam 3, and the pneumatic vibrator 9 is arranged below the cross beam 3.

The number of the cylinders 12 is two, the stroke of the piston of the cylinder 12 is 100cm, the piston can be adjusted according to actual needs, and air inlets and air outlets are formed in two ends of the cylinder 12. The two cylinders 12 are vertically arranged above the cross beam 3 in parallel, the fixed ends of the bottoms of the two cylinders 12 are connected with the cross beam 3, and the fixed frame 15 is connected with the movable ends of the tops of the two cylinders 12; the slings 14 are located between the two cylinders 12.

A vertically arranged guide rod 13 is welded at the top of the pneumatic vibrator 9, and a guide hole for the guide rod 13 to pass through is formed in the cross beam 3; the top end of the guide rod 13 is connected with the fixed frame 15 through the sling 14.

The base 1 is provided with a fixed protection frame 7, and the test tube 6 is arranged in the fixed protection frame 7. The test tube 6 is formed by processing a steel plate with the thickness of 1cm, is of a two-piece type, and is further fixed through a fixed protection frame 7.

The gas supply device also comprises a control cabinet 16, and the gas supply device is arranged in the control cabinet 16; the control cabinet 16 is provided with a gas supply controller. And a limit switch 11 is arranged at the bottom of the cross beam 3 corresponding to the position of the pneumatic vibrator 9. The control cabinet 16 is also provided with a timer 18, a power indicator lamp 19, a power switch 20 button, an emergency stop 21 button, a stop 24 button, a pneumatic controller 17 for controlling the pneumatic pressure of the air supply device, and an ascending 22 button and a descending 23 button for controlling the expansion and contraction of the air cylinder 12. The limit switch 11 and the timer 18 are both connected to the air supply controller. The timer 18 and the air pressure controller 17 are both customized by manufacturers and can meet the requirements.

When the device is used, all parts of the device are installed in place, the test cylinder 6 is installed, the test cylinder 6 is pressed tightly, a proper amount of sample is taken, a specified tool is installed into the test cylinder 6, and the surface of the sample is roughly scraped. The power connection is confirmed to be good, the power indicator lamp 19 on the control cabinet 16 is on, and the air pressure is checked to be normal. The up 22 button, down 23 button, stop 24 button are pressed, and the cylinder 12, the pneumatic vibrator 9 and the balance weight components move freely. When the descending button 23 is pressed, the air cylinder 12 drives the pneumatic vibrator 9 and the tamping plate 8 to descend, when the tamping plate 8 contacts a loose soil sample, the air cylinder 12 can descend continuously until the sling 14 is soft, and when the guide rod 13 can be separated from the sling 14, the stop button 24 is pressed, so that the pneumatic vibrator 9 and the tamping plate 8 stop descending. A timer 18 for setting the time to the time specified by the specification; the air pressure on the air pressure controller 17 is set, and the air pressure is set to the air pressure required for the test. When the power switch 20 is pressed, the pneumatic vibrator 9 starts to vibrate, the timer 18 displays the vibration time, and the pneumatic vibrator 9 is automatically stopped after the predetermined time. When the lifting 22 button is pressed down, the air cylinder 12 drives the pneumatic vibrator 9 and the tamping plate 8 to lift, and when the upper end surface of the pneumatic vibrator 9 is lifted to be contacted with the limit switch 11, the air cylinder 12 automatically stops lifting. And adding a second soil sample according to the test specification, repeating the operation steps twice, and finishing compaction by using one sample even if vibration compaction is finished.

When the machine is installed, the concrete base is poured at first to work stably, and a rubber plate with the thickness of 5-10 mm is paved on the concrete base to reduce vibration. The machine is provided with a 'scram 21' button, when the machine does any action, the 'scram 21' button is pressed, all actions are completely stopped, when the 'scram 21' button is released, the machine is released after the machine is rotated by 90 degrees in the direction indicated by an arrow at the top of the button, and the 'scram 21' button is released. During the vibration, if the fall depth of the sling 14 is not enough, idle vibration may occur, and at this time, the "fall 23" button is pressed, and the "stop 24" button is pressed after reaching a certain position. The device is provided with a limit switch 11, and when the pneumatic vibrator 9 rises to the top point, the machine automatically stops rising. During operation, the air pressure of the air supply equipment must meet the requirements. The processing, manufacturing and mounting precision of each device needs to meet the corresponding regulation and specification requirements. Under the condition that the field test result is stable, different test equipment and test methods need to be verified through the field actual test result.

The utility model discloses can be used to the work of finished piece such as coarse grained soil big triaxial test, penetration test, concrete material are experimental and basic unit's material is experimental, easy operation, convenience, swift are favorable to guaranteeing and improve experimental precision, practice thrift the cost. The utility model has clear principle and high efficiency; the structure is simple and the manufacture is easy; the safety and the reliability are realized; the labor intensity can be reduced, and the economy is good; the adaptability is good; the automation degree is high; the method has great popularization value in the projects of buildings, building materials, water conservancy, electric power, metallurgy, petrifaction, ports, roads and bridges, municipal administration and the like.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-scale pneumatic surface vibration appearance which characterized in that: comprises a base frame; the test cylinder (6) is arranged at the bottom of the base frame; the cylinder (12) is arranged at the upper part of the base frame, the fixed end of the cylinder (12) is connected with the base frame, and the movable end of the cylinder (12) is connected with the fixed frame (15); the pneumatic vibrator (9) is arranged above the test tube (6) and below the fixing frame (15); the pneumatic vibrator (9) is connected with the fixed frame (15) through a sling (14), and the bottom of the pneumatic vibrator (9) is connected with a tamping plate (8); the air cylinder (12) and the pneumatic vibrator (9) are both communicated with an air supply device.

2. A large scale pneumatic surface vibratory meter according to claim 1, wherein: the base frame comprises a base (1), upright posts (2), a cross beam (3) and an upper beam (5); the plurality of upright posts (2) are vertically connected to the base (1), the upper beam (5) is connected to the tops of the plurality of upright posts (2), and the cross beam (3) is detachably connected to the upper parts of the plurality of upright posts (2) through the locking mechanism (4); the test tube (6) is arranged on the base (1), the fixed end of the air cylinder (12) is connected with the cross beam (3), and the pneumatic vibrator (9) is arranged below the cross beam (3).

3. A large scale pneumatic surface vibratory meter according to claim 2, wherein: the two cylinders (12) are vertically arranged above the cross beam (3) in parallel, fixed ends of the bottoms of the two cylinders (12) are connected with the cross beam (3), and the fixed frame (15) is connected with movable ends of the tops of the two cylinders (12); the sling (14) is located between the two cylinders (12).

4. A large scale pneumatic surface vibratory meter according to claim 3, wherein: the top of the pneumatic vibrator (9) is connected with a vertically arranged guide rod (13), and the cross beam (3) is provided with a guide hole for the guide rod (13) to pass through; the top end of the guide rod (13) is connected with the fixed frame (15) through the sling (14).

5. A large scale pneumatic surface vibratory meter according to claim 2, wherein: the test tube test device is characterized in that a fixed protection frame (7) is arranged on the base (1), and the test tube (6) is arranged in the fixed protection frame (7).

6. A large scale pneumatic surface vibratory meter according to claim 2, wherein: the gas supply device also comprises a control cabinet (16), wherein the gas supply device is arranged in the control cabinet (16); the control cabinet (16) is provided with an air supply controller.

7. A large scale pneumatic surface vibratory meter according to claim 6, wherein: a limit switch (11) is arranged at the bottom of the cross beam (3) corresponding to the position of the pneumatic vibrator (9); and the limit switch (11) is connected with the air supply controller.

8. A large scale pneumatic surface vibratory meter according to claim 6, wherein: a timer (18) is also arranged on the control cabinet (16); a timer (18) is connected to the air supply controller.

9. A large scale pneumatic surface vibratory meter according to claim 6, wherein: the control cabinet (16) is also provided with a power indicator lamp (19), a power switch (20) button, an emergency stop (21) button and a stop (24) button; the air supply controller also comprises an air pressure controller (17) used for controlling the air pressure of the air supply equipment, and an ascending (22) button and a descending (23) button used for controlling the expansion and contraction of the air cylinder (12).