CN219257312U - Tire centralized inflation system and engineering vehicle - Google Patents

Abstract

The utility model provides a tire centralized inflation system and an engineering vehicle, and relates to the technical field of engineering vehicles. Therefore, the valve opening and closing valve is not required to be manually opened or closed before inflation and deflation, the operation is convenient and the efficiency is high, in addition, when the tire leaks, the low-pressure safety valve on the leaking tire can be automatically closed, the air pressure of other tires is ensured to be consistent and in the lowest safety pressure range, the safety is ensured in real time, and the reliability is high.

Description

Tire centralized inflation system and engineering vehicle

Technical Field

The utility model relates to the technical field of tire inflation, in particular to a tire centralized inflation system and an engineering vehicle.

Background

Currently, a tire centralized inflation system is generally used for centralized inflation of tires of a construction vehicle such as a pneumatic tire roller, wherein the existing tire centralized inflation system is mainly divided into two types, the first type is a tire centralized inflation system comprising an air pressure sensor, an electromagnetic directional valve, a controller and other electrical controls, and the second type is a tire centralized inflation system comprising a tire valve opening and closing valve and a manual inflation and deflation structure. The two tire centralized inflation systems all need to manually open and close the valve opening and closing valve, and under the condition of tire air leakage, the air inflation channel of the air leakage tire cannot be closed in real time, so that inconsistent tire air pressure is easy to occur, the construction quality of the engineering vehicle is affected, and the safety is lower.

Disclosure of Invention

The utility model solves the problems that: how to automatically close the inflation channel of the flat tire in case of the tire having a flat.

In order to solve the problems, the utility model provides a centralized tire inflation system, which comprises an air supply device, an air storage device and a low-pressure safety valve, wherein an air outlet of the air supply device is connected with an air inlet of the air storage device, an air outlet of the air storage device is connected with an air inlet of the low-pressure safety valve, an air outlet of the low-pressure safety valve is used for being connected with a tire, and the low-pressure safety valve is used for being closed when the difference value between the air pressure of the air inlet of the low-pressure safety valve and the air pressure of the air outlet of the low-pressure safety valve is smaller than a preset air pressure value.

Optionally, the low pressure relief valve includes valve body, shutoff piece and elastic component, be equipped with the air current passageway in the valve body, the shutoff piece with the elastic component is located in the air current passageway, the air inlet of low pressure relief valve with the gas outlet of low pressure relief valve respectively with the air current passageway communicates, when the air pressure of the air inlet of low pressure relief valve with the difference of the air pressure of the gas outlet of low pressure relief valve is greater than predetermine the atmospheric pressure value, the shutoff piece is opened the air current passageway, when the air pressure of the air inlet of low pressure relief valve with the difference of the air pressure of the gas outlet of low pressure relief valve is less than predetermine the atmospheric pressure value, the shutoff piece is in under the effect of elastic component closes the air current passageway.

Optionally, one end of the elastic member is connected with the valve body, and the other end of the elastic member is connected with the plugging member.

Optionally, the plugging piece is a spherical structure, a cone structure matched with the spherical structure is arranged in the valve body, when the spherical structure is contacted with the cone structure, the plugging piece closes the airflow channel, and when the spherical structure is separated from the cone structure, the plugging piece opens the airflow channel.

Optionally, the centralized tire inflation system further comprises a pressure regulating device, the pressure regulating device comprises a pressure regulating valve and a barometer, the pressure regulating valve is arranged on a pipeline between the gas storage device and the low-pressure safety valve, and the barometer is arranged on a pipeline between the pressure regulating valve and the low-pressure safety valve.

Optionally, the pressure regulating device further comprises a muffler arranged on the pressure regulating valve.

Optionally, the centralized tire inflation system further comprises a dryer, and the dryer is arranged between the air supply device and the air storage device.

Optionally, the centralized tire inflation system further comprises a high-pressure safety valve, wherein the high-pressure safety valve is arranged on an exhaust port of the dryer.

Optionally, the centralized tire inflation system further comprises an energy accumulator arranged on the dryer, and the energy accumulator is communicated with the air outlet of the dryer.

In order to solve the problems, the utility model also provides an engineering vehicle, which comprises the tire centralized inflation system.

Compared with the prior art, the utility model has the following beneficial effects:

the low-pressure safety valves are respectively arranged on the inflating valves of the tires of the engineering vehicle, and the low-pressure safety valves are closed when the air pressure difference value between the air inlet and the air outlet of the low-pressure safety valves is smaller than a preset air pressure value, so that when the tires leak, the low-pressure safety valves on the leaking tires can be automatically closed, the air pressures of other tires are ensured to be consistent and within the lowest safety pressure range, safety is ensured in real time, the reliability is high, and the inflating valve opening and closing valve is not required to be manually opened or closed. In addition, in the inflation process, the air leakage tire can generate a short-term shrinkage phenomenon when the air leakage tire continuously leaks after the low-pressure safety valve is closed, so that the air leakage tire is easy to distinguish, the distinguishing difficulty is effectively reduced, and the convenience of distinguishing operation is improved.

Drawings

FIG. 1 is a schematic diagram of a tire inflation system according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of the low pressure relief valve at a in fig. 1.

Reference numerals illustrate:

1. a gas supply device; 2. a gas storage device; 21. an air cylinder; 22. a water drain valve; 3. a pressure regulating device; 31. a pressure regulating valve; 32. an air pressure gauge; 33. a muffler; 4. a low pressure relief valve; 41. a valve body; 42. a blocking member; 43. an elastic member; 5. a dryer; 6. a high pressure relief valve; 7. an accumulator; 100. a front wheel; 200. a rear wheel; 310. a front axle; 320. and a rear axle.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

Referring to fig. 1, an embodiment of the present utility model provides a centralized inflation system for a tire (abbreviated as an inflation system), which includes an air supply device 1, an air storage device 2, and a low pressure safety valve 4, wherein an air outlet of the air supply device 1 is connected with an air inlet of the air storage device 2, an air outlet of the air storage device 2 is connected with an air inlet of the low pressure safety valve 4, an air outlet of the low pressure safety valve 4 is connected with a tire, and the low pressure safety valve 4 is closed when a difference between an air pressure of the air inlet of the low pressure safety valve 4 and an air pressure of the air outlet of the low pressure safety valve 4 is smaller than a preset air pressure value.

Specifically, the construction vehicle such as a pneumatic roller has a plurality of front wheels 100 and a plurality of rear wheels 200, each front wheel 100 is connected to a front axle 310, each rear wheel 200 is connected to a rear axle 320, the front axle 310 and the rear axle 320 are hollow shafts, the inner space of the hollow shafts constitutes an inflation channel, the low pressure relief valve 4 is installed at the inflating valve of each front wheel 100 and each rear wheel 200, the air outlet of the low pressure relief valve 4 is communicated with the inflating valve of the corresponding tire, the air inlet of the low pressure relief valve 4 on the front wheel 100 is communicated with the air outlet of the air storage device 2 through the inflation channel of the front axle 310, the air inlet of the low pressure relief valve 4 on the rear wheel 200 is communicated with the air outlet of the air storage device 2 through the inflation channel of the rear axle 320, the air supply device 1 supplies high pressure air to the air storage device 2, the high pressure air stored in the air storage device 2 flows out from the air outlet of the air storage device 2 and then is split into two paths, one path flows to the inflation channel of the front axle 310 to inflate each front wheel 100, and the other path flows to the inflation channel of the rear wheels 200 to inflate each rear wheel 200. The preset air pressure value is the minimum air pressure value required when overcoming the elastic member 43 (described later) in the low pressure safety valve 4, and is also the minimum safety air pressure of the tire, when the difference between the air pressure of the air inlet of the low pressure safety valve 4 and the air pressure of the air outlet of the low pressure safety valve 4 is greater than the preset air pressure value, that is, when the difference between the air pressure of the air inlet of the low pressure safety valve 4 and the air pressure of the air outlet of the low pressure safety valve 4 is greater than the minimum safety air pressure, the blocking member 42 (described later) in the low pressure safety valve 4 can overcome the elastic force of the elastic member 43 and conduct the air flow channel in the low pressure safety valve 4, so that the low pressure safety valve 4 is opened, and when the difference between the air pressure of the air inlet of the low pressure safety valve 4 and the air pressure of the air outlet of the low pressure safety valve 4 is less than the preset air pressure value, that is less than the minimum safety air pressure, the blocking member 42 in the low pressure safety valve 4 can not overcome the elastic force of the elastic member 43, so that the low pressure safety valve 4 is closed. Under normal conditions, namely when no tire leaks, the air pressure of the air charging system is far greater than the air pressure when the tire is full of air, the air pressure of the air charging system is also the air pressure of the air inlet of the low-pressure safety valve 4, and the air pressure of the tire is also the air pressure of the air outlet of the low-pressure safety valve, so that the air pressure difference between the air inlet and the air outlet of the low-pressure safety valve 4 is always greater than a preset air pressure value, the low-pressure safety valve 4 is kept in a normally open state, and all the tires are in a mutually communicated state, so that the air pressures are kept consistent.

When each tire is intensively inflated, the difference between the air pressure of the inflation system and the air pressure of the tire is larger than the preset air pressure value of the low-pressure safety valve 4, namely, the difference between the air pressure of the air inlet and the air outlet of the low-pressure safety valve 4 is larger than the preset air pressure value of the low-pressure safety valve 4, and the low-pressure safety valve 4 is in an open state, so that the inflation system is communicated with each tire, and each tire is automatically inflated. In the inflation process, if a certain tire leaks, the air pressure of the leaking tire is reduced, and the difference between the air pressure of the inflation system and the air pressure of the leaking tire is still greater than the preset air pressure value of the low pressure safety valve 4, so that the leaking tire leaks while being inflated, when the difference between the air pressure of the inflation system and the air pressure of the leaking tire is reduced to be smaller than the preset air pressure value of the low pressure safety valve 4 due to the fact that the leaking speed is greater than the inflation speed, the low pressure safety valve 4 on the leaking tire is automatically closed, so that the inflation system is not communicated with the leaking tire, the continuous inflation of the leaking tire is stopped, and in the inflation process, the low pressure safety valve 4 is frequently switched between being closed and opened because the air supply device 1 normally continuously supplies high pressure air.

In this embodiment, through setting up low pressure relief valve 4 respectively on the inflating valve of each tire of engineering vehicle to set up low pressure relief valve 4 to the atmospheric pressure difference of its air inlet and gas outlet is less than when predetermineeing the atmospheric pressure value, so that when the tire takes place to leak gas, the low pressure relief valve 4 on the gas leakage tire can the self-closing, ensures that the atmospheric pressure of other tires is unanimous and be in minimum safe pressure range, and safe real-time has the guarantee, and the reliability is high, need not the manual valve switch valve of opening or closing before filling the gassing. In addition, in the inflation process, the air leakage tire can generate a short-term shrinkage phenomenon when continuously air leakage occurs after the low-pressure safety valve 4 is closed, so that the air leakage tire is easy to distinguish, the difficulty of distinguishing is effectively reduced, and the convenience of distinguishing operation is improved.

Optionally, the air supply device 1 comprises an air pump for connection to an engine or an external air source.

In this embodiment, the air pump is used to pressurize the air obtained from the air source to form high-pressure air, and the air pump can take air from the engine or from an external air source. In this way, air is taken from the engine or an external air source using an air pump and pressurized to form high pressure air to provide the inflation system with the high pressure air required by the tire.

Alternatively, the gas storage device 2 includes a gas storage cylinder 21 and a water drain valve 22 provided on the gas storage cylinder 21, and the high-pressure gas supplied from the gas supply device 1 is stored in the gas storage cylinder 21.

In this embodiment, the high-pressure gas pressurized by the air pump enters the air cylinder 21 for storage, and when the air needs to be inflated, the air cylinder 21 is used for intensively inflating each tire, so that the inflation efficiency is improved, and meanwhile, the water drain valve 22 is arranged on the air cylinder 21 to perform the water-proof and slag-removing operation on the air cylinder 21.

Alternatively, as shown in fig. 2, the low pressure relief valve 4 includes a valve body 41, a blocking member 42 and an elastic member 43, where an air flow channel is provided in the valve body 41, the blocking member 42 and the elastic member 43 are provided in the air flow channel, an air inlet of the low pressure relief valve 4 and an air outlet of the low pressure relief valve 4 are respectively communicated with the air flow channel, when a difference between an air pressure of the air inlet of the low pressure relief valve 4 and an air pressure of the air outlet of the low pressure relief valve 4 is greater than a preset air pressure value, the blocking member 42 opens the air flow channel, and when a difference between an air pressure of the air inlet of the low pressure relief valve 4 and an air pressure of the air outlet of the low pressure relief valve 4 is less than a preset air pressure value, the blocking member 42 closes the air flow channel under the action of the elastic member 43.

Specifically, the blocking member 42 may be connected to the elastic member 43 or may be disconnected from the elastic member 43, and the elastic member 43 pushes the blocking member 42 by contact when the blocking member 42 is disconnected from the elastic member 43. As shown in fig. 2, the left end of the valve body 41 is provided with an air outlet communicating with the valve, and the right end is provided with an air inlet communicating with the inflation channel of the tire shaft (i.e., the front shaft 310 and the rear shaft 320). When the difference between the air pressure of the air inflation system and the air pressure of the tire is greater than the preset air pressure value, the blocking piece 42 of the low-pressure safety valve 4 moves to the left, and the air inflation system is communicated with the tire so as to inflate the tire. When the tire leaks, the air pressure of the leaking tire becomes smaller, because the air charging system is communicated with the leaking tire, the air pressure at the left side of the low pressure safety valve 4 (namely, the air pressure of the leaking tire) is equal to the air pressure at the right side of the low pressure safety valve 4, so the air pressure at the right side of the low pressure safety valve 4 also decreases, when the air pressure at the right side of the low pressure safety valve 4 decreases to the difference between the air pressure at the right side and the air pressure at the left side of the low pressure safety valve 4 is smaller than the preset air pressure value, the blocking piece 42 of the low pressure safety valve 4 moves rightwards under the acting force of the elastic piece 43 to block the air inlet of the valve body 41, so that a pipeline between the leaking tire and the air charging system is disconnected, and the air charging system is prevented from continuously charging the leaking tire when the tire leaks. When the air pump of the air supply device 1 continues to pump air to an air source such as an engine, the air pressure on the right side of the low pressure relief valve 4 gradually increases, and when the difference between the air pressure on the right side of the low pressure relief valve 4 and the air pressure on the left side of the low pressure relief valve 4 is greater than a preset air pressure value, the blocking piece 42 of the low pressure relief valve 4 moves to the left side, the inflation system is communicated with the air leakage tire and inflates the air leakage tire, but due to the air leakage of the tire, the blocking piece 42 of the low pressure relief valve 4 moves to the right under the action of the elastic piece 43 to block the air inlet of the low pressure relief valve 4. Therefore, the blocking member 42 of the low pressure relief valve 4 is continuously moved left and right during the tire air leakage and the air pump continues to suck air.

In this embodiment, the mechanical structures of the blocking member 42 and the elastic member 43 are matched to realize automatic opening and closing of the low-pressure safety valve 4, so that the structure is simple and reliable, the cost is low, and the economical efficiency is good.

Further, the high-pressure gas is restricted to flow from the inlet to the outlet of the low-pressure relief valve 4 and cannot be conducted reversely, i.e., the low-pressure relief valve 4 has a one-way valve function, so that the high-pressure gas can be prevented from flowing back into the inflation system from the tire.

Alternatively, as shown in connection with fig. 2, one end of the elastic member 43 is connected to the valve body 41, and the other end of the elastic member 43 is connected to the blocking member 42.

In this embodiment, the elastic member 43 is preferably connected to the blocking member 42, so that the blocking member 42 and the elastic member 43 can be assembled and disassembled as a whole, thereby improving the assembly and disassembly efficiency.

Alternatively, the blocking member 42 has a spherical structure, a cone structure cooperating with the spherical structure is provided in the valve body 41, the blocking member 42 closes the air flow passage when the spherical structure contacts the cone structure, and the blocking member 42 opens the air flow passage when the spherical structure is separated from the cone structure.

In this embodiment, a spherical structure such as a ball is adopted as the blocking member 42, so that the structure of the blocking member 42 can be simplified, and the processing and manufacturing of the blocking member 42 are facilitated; meanwhile, by providing a cone structure in the valve body 41, which is matched with the spherical structure, the automatic opening and closing of the low pressure relief valve 4 is realized by utilizing the mutual matching between the spherical structure and the cone structure, so as to further simplify the mechanical structure of the low pressure relief valve 4.

Optionally, the centralized tire inflation system further comprises a dryer 5, wherein the dryer 5 is arranged between the air supply device 1 and the air storage device 2.

In this embodiment, the dryer 5 is provided in the line between the air pump and the air tank 21, so that the high-pressure gas is dried by the dryer 5 to prevent water vapor in the high-pressure gas from flowing into each valve structure such as the pressure regulating valve 31 to affect the operation of each valve structure.

Optionally, the tire inflation system further comprises a high pressure relief valve 6, the high pressure relief valve 6 being provided on the exhaust port of the dryer 5.

In this embodiment, the high pressure relief valve 6 is mounted on the exhaust port of the dryer 5, and the high pressure relief valve 6 is typically provided with the highest relief pressure. When the air pressure of the inflation system exceeds the highest safety air pressure of the high-pressure safety valve 6, the high-pressure safety valve 6 is opened, so that the inflation system is communicated with the atmosphere for pressure relief, and the protection is performed when the air pressure of the inflation system is overlarge.

Optionally, the tire centralized inflation system further comprises an accumulator 7 disposed on the dryer 5, and the accumulator 7 is in communication with the air outlet of the dryer 5.

In this way, the high-pressure gas stored in the accumulator 7 can be utilized to offset the long-time air pressure loss of the tire, and the air pressure stability of the tire is ensured.

Optionally, the tire centralized inflation system further comprises a pressure regulating device 3, the pressure regulating device 3 comprises a pressure regulating valve 31 and a barometer 32, the pressure regulating valve 31 is arranged on a pipeline between the gas storage device 2 and the low-pressure safety valve 4, and the barometer 32 is arranged on a pipeline between the pressure regulating valve 31 and the low-pressure safety valve 4.

In this embodiment, the pressure regulating valve 31 is communicated with the air cylinder 21 of the air storage device 2, and the air pressure gauge 32 is communicated with the low pressure relief valves 4 on the front wheel 100 and the rear wheel 200 through three-way joints. Thus, when the tires are intensively inflated, the inflation pressure of the inflation system can be set through the pressure regulating valve 31, high-pressure gas in the gas storage device 2 flows to each low-pressure safety valve 4 after being regulated by the pressure regulating device 3, the high-pressure gas is stable after being regulated by the pressure regulating device 3, the air pressure of each tire can be ensured to be consistent, and meanwhile, the air pressure of the inflation system is displayed in real time through the air pressure meter 32, so that an operator can intuitively read the current air pressure of the inflation system from the air pressure meter 32.

Optionally, the pressure regulating device 3 further comprises a muffler 33 provided on the pressure regulating valve 31.

In this way, when the pressure of the inflation system is reduced by the pressure regulating valve 31, noise generated by the increase in pressure difference can be reduced by the muffler 33.

Another embodiment of the present utility model provides an engineering vehicle comprising a tire inflation system as described above. The work vehicle includes a pneumatic tire roller. The beneficial effects of the engineering vehicle in this embodiment compared with the prior art are the same as those of the tire centralized inflation system described above, and are not described here again.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.

Claims (10)

1. The utility model provides a tire centralized inflation system, its characterized in that includes air feeder (1), gas storage device (2) and low pressure relief valve (4), the gas outlet of air feeder (1) with the air inlet of gas storage device (2) is connected, the gas outlet of gas storage device (2) with the air inlet of low pressure relief valve (4) is connected, the gas outlet of low pressure relief valve (4) is used for being connected with the tire, just low pressure relief valve (4) are used for when the difference of the atmospheric pressure of the air inlet of low pressure relief valve (4) with the atmospheric pressure of the gas outlet of low pressure relief valve (4) is less than the default atmospheric pressure value.

2. The centralized tire inflation system according to claim 1, wherein the low-pressure safety valve (4) comprises a valve body (41), a blocking piece (42) and an elastic piece (43), an air flow channel is arranged in the valve body (41), the blocking piece (42) and the elastic piece (43) are arranged in the air flow channel, an air inlet of the low-pressure safety valve (4) and an air outlet of the low-pressure safety valve (4) are respectively communicated with the air flow channel, when the difference between the air pressure of the air inlet of the low-pressure safety valve (4) and the air pressure of the air outlet of the low-pressure safety valve (4) is larger than the preset air pressure value, the blocking piece (42) opens the air flow channel, and when the difference between the air pressure of the air inlet of the low-pressure safety valve (4) and the air pressure of the air outlet of the low-pressure safety valve (4) is smaller than the preset air pressure value, the blocking piece (42) closes the air flow channel under the action of the elastic piece (43).

3. A tyre central inflation system according to claim 2, wherein one end of the elastic member (43) is connected to the valve body (41), and the other end of the elastic member (43) is connected to the blocking member (42).

4. The tyre central inflation system according to claim 2, wherein the blocking member (42) is of a spherical structure, a cone structure cooperating with the spherical structure is provided in the valve body (41), the blocking member (42) closing the air flow passage when the spherical structure is in contact with the cone structure, and the blocking member (42) opening the air flow passage when the spherical structure is separated from the cone structure.

5. Tyre centralized inflation system according to any one of claims 1 to 4, further comprising a pressure regulating device (3), said pressure regulating device (3) comprising a pressure regulating valve (31) and a barometer (32), said pressure regulating valve (31) being arranged on a line between said gas storage device (2) and said low pressure relief valve (4), said barometer (32) being arranged on a line between said pressure regulating valve (31) and said low pressure relief valve (4).

6. The tyre central inflation system according to claim 5, wherein the pressure regulating device (3) further comprises a muffler (33) provided on the pressure regulating valve (31).

7. The tyre central inflation system according to claim 5, further comprising a dryer (5), said dryer (5) being provided between said air supply device (1) and said air storage device (2).

8. The tyre central inflation system according to claim 7, further comprising a high pressure relief valve (6), said high pressure relief valve (6) being provided on the exhaust port of the dryer (5).

9. The tyre central inflation system according to claim 7, further comprising an accumulator (7) provided on the dryer (5), and the accumulator (7) is in communication with the air outlet of the dryer (5).

10. A construction vehicle comprising a tire inflation system according to any one of claims 1-9.

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