CN211249601U - Gas type pressure output device - Google Patents

Abstract

The utility model relates to a gaseous formula pressure output device, a serial communication port, the device sets up on buffing machine with higher speed, specifically is: the cylinder body is fixed on the body of the accelerated polishing machine through a bolt, the rotating shaft A is a movable hinge connecting shaft between the cylinder rod and the lever, the rotating shaft B is a fixed hinge connecting shaft at the other end of the lever, and the rotating shaft can rotate around the rotating shaft B; the cylinder is connected with a manual valve through an air pipe, and the manual valve is connected with a pressure control valve through an air pipe. The utility model discloses can improve and accelerate buffing machine forward pressure stability, reduce the equipment vibration. The utility model adopts the air pressure mode to ensure the stable output of 725N positive pressure; the device provides buffer for accelerating the operation of the polishing machine, and reduces the vibration of equipment; and the pressure control valve is adopted to correct the positive pressure output of the accelerated polishing machine in real time.

Description

Gas type pressure output device

Technical Field

The utility model belongs to the important equipment of indoor simulation road surface buffing performance that gathers materials

Background

Accelerating the polishing machine: the accelerated polishing machine is a test device which polishes a test piece made of aggregate particles through water and carborundum indoors and simulates the polishing effect of an automobile tire on a road surface. The working principle is that according to the method prescribed by JTG E42-2005, the manufactured test piece is mounted on the road wheel of the polishing machine, the rubber wheel is pressed forward, and the polishing test piece is rotated at a certain load and time by adding water and coarse and fine carborundum, so as to simulate the polishing effect of the coarse aggregate used in the asphalt pavement when the wheel runs.

The basic structure of the acceleration polishing machine is shown in figure 1, and the acceleration polishing machine is divided into ten parts: road wheel, counter weight, adjustment assembly, lever, rubber wheel, fine sand storage hopper, water supply installation, coarse sand storage hopper, organism, test piece.

The accelerated polishing machine is important equipment for simulating the polishing performance of pavement aggregate indoors, is widely applied in the research process of the performance of the aggregate in China, has service amount of over thousands of equipment in the market, is important equipment for researching the anti-slip performance of the aggregate, and is widely concerned by industry management departments and engineering technicians. The anti-skid performance of the highway is directly related to the safety of vehicles in trip, the aggregate is a main component material of the pavement, and the selection and the structural characteristics of the material are one of the most important factors influencing the anti-skid performance of the pavement, so that the research on the anti-skid performance of the aggregate in the highway construction process is a key content which is long-term concerned by engineering technicians and scientific researchers, and a plurality of specifications, standards and methods are published and used for guiding construction and detection.

The majority of expressways in China are asphalt pavements, the proportion of aggregates in the asphalt pavements is about 95%, and the performance of the aggregates has important influence on the asphalt pavements. The aggregate on the surface layer of the asphalt pavement can be gradually reduced in texture and roughness under the repeated abrasion of vehicle tires, and the aggregate on the surface layer can be gradually smoothed, so that the antiskid performance of the pavement is greatly reduced. Therefore, the anti-polishing and abrasion performance of the coarse aggregate is accurately evaluated, so that the aggregate with better abrasion resistance is selected to be used for paving the surface layer of the asphalt pavement, and the good anti-skid performance of the asphalt pavement can be ensured.

The accelerated polishing machine is used as the most important equipment for researching the aggregate anti-skid performance, completely accords with JTG E42-2005 highway engineering aggregate test regulation T0321-2005 coarse aggregate polishing value test parameters, integrates related parameters such as wheels, roads, vehicle speed, vehicles, environment and the like, and outputs data representing the anti-skid performance of the aggregate under specific conditions for guiding construction, so that whether the key parameters of the accelerated polishing machine accord with the T0321-2005 coarse aggregate polishing value test method is particularly important for metering and verification of the key parameters. According to the requirements of the JJG (traffic) 054 + 2009 acceleration polishing machine metering and calibrating rules, the forward pressure and the integral accuracy of a road wheel, a rubber wheel, a sand feeding and water supplying device and the rubber wheel to the road wheel are calibrated and standardized, the uniformity of a testing device is ensured, the reliability of the output value of the acceleration polishing machine is ensured, and a technical support is provided for the aggregate anti-skid performance test.

The accelerated polishing machine is suitable for special equipment for evaluating the polishing value of stone materials, and the conformity of all parts of the equipment, the scientificity and the stability of the running state are the keys of whether the equipment can be used for testing the stone materials. The forward pressure of the rubber wheel on the road wheel is an important parameter for measuring the polishing value, the T0321-2005 coarse aggregate polishing value test method specifies that the forward pressure of the rubber wheel on the road wheel (actually, a rubber wheel test piece) is 725N, and equipment manufacturers generally adopt the structure shown in FIG. 2 for ensuring that the value reaches the requirements of the test method.

The working principle is as follows:

when the polishing machine works, the road wheel rotates anticlockwise at the speed v of 320r/min, the rubber wheel is driven to rotate clockwise, and 725N positive pressure is applied to a test piece tiled on the road wheel. The positive pressure is indirectly acted on the road wheel by the balance weight through the lever, and the structure has the following problems in the actual detection process:

1. in the high-speed rotation process of the road wheel with larger diameter (phi 406mm), equipment is seriously jolted and even cannot normally work under 725N pressure due to the manufacturing error of the road wheel, the installation error of a test piece, the hardness of a rubber wheel and the like;

2. the impact of jolting caused by the road wheel working at a high speed on a test piece is large, and the test piece is easy to break.

3. The polishing machine is in normal operating condition with higher speed, jolts and arouses the vibration, leads to the balancing weight shake serious, and the noise is great, has the potential safety hazard.

The reason for this is that the counterweight steel block is rigidly connected with the rubber wheel through the lever in the positive pressure loading process of the rubber wheel, and the use requirement can not be met without a buffer device or a buffer device.

The 725N pressure that adopts above-mentioned structure to produce is decided by balancing weight quality and lever ratio completely, can reach the pressure requirement through adjusting the balancing weight quality under static condition, but reasons such as later stage counter weight corrosion cause the quality to change, and operating personnel hardly discovers, leads to the test of development burnishing value under the not up to standard condition of pressure. In addition, under the condition of accelerating the vibration of the lever of the polishing machine, the balancing weight cannot be vertically placed due to swinging, and the pressure value is deviated due to bending and other reasons in the long-term use process of the lever.

Disclosure of Invention

The problem of vibration caused by poor concentricity of the road wheel and uneven height of stone materials of the accelerated polishing machine can be solved, and the stability of forward pressure is improved

A gas type pressure output device is characterized in that the device is arranged on an accelerating polishing machine, and comprises: the cylinder body is fixed on the body of the accelerated polishing machine through a bolt, the rotating shaft A is a movable hinge connecting shaft between the cylinder rod and the lever, the rotating shaft B is a fixed hinge connecting shaft at the other end of the lever, and the rotating shaft can rotate around the rotating shaft B. The cylinder is connected with a manual valve through an air pipe, and the manual valve is connected with a pressure control valve through an air pipe.

The application through this patent can improve and accelerate buffing machine forward pressure stability, reduces the equipment vibration.

The utility model discloses characteristics:

1. ensuring 725N positive pressure to be stably output by adopting an air pressure mode;

2. the device provides buffer for accelerating the operation of the polishing machine, and reduces the vibration of equipment;

3. and the pressure control valve is adopted to correct the positive pressure output of the accelerated polishing machine in real time.

Drawings

FIG. 1 is a schematic view of the basic structure of an accelerated polishing machine

FIG. 2 is a schematic view of a weight-type rubber wheel pressing structure

FIG. 3 is a schematic view of a pneumatic type accelerating polishing machine

1-road wheels; 2-counterweight; 3-adjustment assembly; 4-lever; 5-rubber wheel; 6-fine sand storage hopper; 7-water supply device; 8-coarse sand storage hopper; 9-the organism; 10-test piece 11-lever; 12-rubber wheel shaft; 13-hinged end; 14-road wheel axle; 15-axis of rotation A; 16-cylinder; 17-manual valve; 18-pressure control valve; 19-axis of rotation B

Detailed Description

The cylinder body is fixed on the machine body through a bolt, the rotating shaft A is a movable hinge connecting shaft between the cylinder rod and the lever, the rotating shaft B is a fixed hinge connecting shaft at the other end of the lever, and the rotating shaft A can rotate around the rotating shaft B. The cylinder is connected with a manual valve through an air pipe, and the manual valve is connected with a pressure control valve through an air pipe. The pneumatic pressure device adopts pneumatic pressurization to realize the forward pressure of the rubber wheel and road wheels, and comprises a cylinder, a pressure control valve, a manual valve, a lever and the like as shown in figure 3. The cylinder body is fixed on the machine body through a bolt, the rotating shaft A is a movable hinge connecting shaft between the cylinder rod and the lever, the rotating shaft B is a fixed hinge connecting shaft at the other end of the lever, and the rotating shaft A can rotate around the rotating shaft B. The cylinder is connected with a manual valve through an air pipe, and the manual valve is connected with a pressure control valve through an air pipe. The manual valve switch is opened or closed, the cylinder can be controlled to pressurize or release pressure, and the pressure control valve is rotated to control and adjust the pressurizing magnitude. The pressure control valve is rotated to adjust the air inlet pressure, the manual valve switch is opened to enable the air cylinder to be pressurized to pressure P, the air cylinder rod is pressed downwards, the rubber wheel begins to press a test piece on the road wheel, the air control valve is adjusted to enable the thrust F of the air cylinder rod to meet the requirement, and the relation between the thrust of the air cylinder and the pressure is shown in a formula 1.

F＝P×S (1)

In the formula:

f-cylinder rod thrust;

p-cylinder pressure;

s-cylinder rod cross-sectional area.

When the thrust meets the requirement, a starting switch of the acceleration polishing machine is turned on, a test piece on the road wheel starts to rotate along with the road wheel, and meanwhile, the rubber wheel is driven to rotate through friction, so that the effect that the vehicle rolls the road surface is simulated. When the road wheel and the test piece bump upwards in the running process, an upward acceleration a is generated₁The pressure is increased, and because the gas can be compressed, the cylinder rod retracts, the direction change has a buffer effect, the vibration of the rubber wheel and the lever is reduced, the pressure in the cylinder body is increased at the moment, the pressure control valve works, and the pressure in the cylinder body is reduced to a set state; when the road wheel and the test piece bump downwards in the running process, the downward acceleration a is generated₂And the air cylinder rod extends outwards, the pressure in the cylinder body is reduced at the moment, the pressure control valve is started, and external high-pressure air is injected into the cylinder body to enable the pressure to reach a set value.

Claims (1)

1. A gas type pressure output device is characterized in that the device is arranged on an accelerating polishing machine, and comprises: the cylinder body is fixed on the body of the accelerated polishing machine through a bolt, the rotating shaft A is a movable hinge connecting shaft between the cylinder rod and the lever, the rotating shaft B is a fixed hinge connecting shaft at the other end of the lever, and the rotating shaft can rotate around the rotating shaft B; the cylinder is connected with a manual valve through an air pipe, and the manual valve is connected with a pressure control valve through an air pipe.

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