CN111347882A

CN111347882A - Air valve box integrating automatic bow lowering function

Info

Publication number: CN111347882A
Application number: CN202010275950.0A
Authority: CN
Inventors: 周维; 宾远东; 朱进; 康锡忠; 段永忠; 阳雄
Original assignee: Zhuzhou Wanxin Rail Electric Technology Co ltd
Current assignee: Zhuzhou Wanxin Rail Electric Technology Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-06-30
Anticipated expiration: 2040-04-09
Also published as: CN111347882B

Abstract

The air valve box integrated with the automatic bow lowering function comprises a box cover, a left air inlet, a right air inlet, an air outlet, an air path block I, a box body, a filter valve, a bow raising throttle valve, a pressure regulating valve, a bow lowering throttle valve, a pressure gauge and a safety valve; be equipped with the feedback mouth on the gas circuit piece I, be equipped with the fast valve of arranging in the box, the fast valve of arranging is connected with the gas outlet on the gas circuit piece I through the gas circuit pipe that is equipped with the stop valve, the fast valve of arranging is connected with the feedback mouth on the gas circuit piece I through the gas circuit pipe, the feedback mouth is connected gas circuit pipe to pantograph carbon slide, makes up into a whole, is called automatic bow unit that falls, carbon slide inside is equipped with air flue or air cavity. The automatic pantograph lowering function is integrated in the air valve box, so that the arrangement of a pantograph air circuit can be simplified, a pipeline between the existing pantograph air valve box and the automatic pantograph lowering device is shortened, the cost is saved, and the pantograph assembling efficiency is improved; meanwhile, the leakage risk caused by the arrangement of the pantograph gas circuit can be reduced, and the running stability of the pantograph is improved.

Description

Air valve box integrating automatic bow lowering function

Technical Field

The invention relates to an air valve box, in particular to an air valve box integrating an automatic bow lowering function.

Background

The automatic pantograph lowering function of the existing pantograph belongs to an optional component, and most of the existing urban rail pantograph is not provided with the automatic pantograph lowering function. The air valve box and the automatic pantograph lowering device of the pantograph with the automatic pantograph lowering function are two different units which are respectively arranged at two positions of the chassis of the pantograph. The air valve box is a combination of pneumatic elements, integrates elements such as a filter valve, a pantograph lifting throttle valve, a precise pressure regulating valve, a pantograph lowering throttle valve, a safety valve and the like, supplies air to the pantograph, controls the pantograph to lift and regulates the contact pressure; the automatic pantograph-lowering device is provided with a gas path monitoring system for protecting the contact network cable and the pantograph slide plate from continuing excessive abrasion after reaching the minimum abrasion limit.

However, no research and report on an air valve box integrating an automatic pantograph function is found at present.

Disclosure of Invention

The invention aims to solve the technical problem of providing an air valve box integrated with an automatic bow lowering function aiming at the defects of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: an air valve box integrating an automatic bow lowering function comprises a box cover, a left air inlet, a right air inlet, an air outlet, an air path block I, a box body, a filter valve, a bow raising throttle valve, a pressure regulating valve, a bow lowering throttle valve, a pressure gauge and a safety valve;

the filter valve, the bow-rising throttle valve, the pressure regulating valve, the bow-falling throttle valve, the pressure gauge and the safety valve are mutually connected through pipe joints and fixed on the mounting plate I to form a whole, namely a pressure regulating unit, the pressure regulating unit is fixed on the box body and is in air connection with an air outlet on the air path block I through an air path pipe, and the left air inlet and the right air inlet are in air connection with the pressure regulating unit through the air path pipe;

be equipped with the feedback mouth on the gas circuit piece I, be equipped with the fast valve of arranging in the box, the air connection is realized through the gas outlet that is equipped with on the gas circuit pipe and the gas circuit piece I of stop valve to the fast valve of arranging, the air connection is realized through the feedback mouth on gas circuit pipe and the gas circuit piece I to the fast valve of arranging, the feedback mouth is connected gas circuit pipe and is managed to pantograph carbon slide, makes up into a whole, is called automatic bow unit that falls, inside air flue or the air cavity of being equipped with of carbon slide.

Furthermore, a test valve is arranged on a connecting pipeline of the quick exhaust valve and a feedback port on the air path block I. The test valve is arranged on the air path block I.

Further, be equipped with mounting panel II in the box, the fast valve of arranging passes through the coupling to be fixed on mounting panel II.

Further, the quick exhaust port of the quick exhaust valve is equipped with a muffler.

Furthermore, the filter valve and the precise pressure regulating valve are fixed on the mounting plate I through a support.

Furthermore, manometer, relief valve pass through air route piece II and fix on mounting panel I.

Further, case lid and box are formed by the sheet metal component welding, and both connect through the connecting piece and constitute box structure.

Further, the fast valve of arranging includes epicoele and cavity of resorption, keeps apart through diaphragm and spring, has the water conservancy diversion aperture on the diaphragm to be used for balanced atmospheric pressure, the epicoele realizes the air connection through the feedback mouth on gas circuit pipe and the gas circuit piece I, the air inlet is connected to the cavity of resorption to isolated with fast row of mouthful by the diaphragm.

Locomotive is in service, if pantograph carbon slide or monitoring pipe way (automatic bow unit connecting line that falls) have any damage (damaged or excessive wearing and tearing), cause compressed gas to reveal, monitoring pipe way atmospheric pressure falls suddenly, triggers fast arranging the valve and starts, compressed air in the pantograph gasbag is gone into the air valve case by the gas outlet, and the direct fast row mouth that passes through fast arranging the valve is arranged to the atmosphere (fast row mouth is provided with the muffler) to realize the automatic bow that falls of pantograph. The function can also be cut off through a ball valve in the box body, and the automatic pantograph-descending monitoring of the pantograph is closed.

The automatic pantograph lowering function is integrated in the air valve box, so that the arrangement of a pantograph air circuit can be simplified, a pipeline between the existing pantograph air valve box and the automatic pantograph lowering device is shortened, the cost is saved, and the pantograph assembling efficiency is improved; meanwhile, the leakage risk caused by the arrangement of the pantograph gas circuit can be reduced, and the running stability of the pantograph is improved. For the existing automatic pantograph lowering device, the existing automatic pantograph lowering device is completely exposed at present, and is corroded by ultraviolet rays and dust for a long time, so that a diaphragm in a quick discharge valve of the automatic pantograph lowering device is easy to break down, and pantograph raising cannot be carried out. The automatic bow lowering device is integrated in the air valve box, the operating environment of the automatic bow lowering device is improved, ultraviolet irradiation can be avoided, erosion of a large amount of dust can be relieved, and the service life and the operating stability of the diaphragm can be improved.

Drawings

FIG. 1 is a front view of an embodiment of an air valve box of the present invention incorporating automatic bow reduction;

FIG. 2 is a left side view of the embodiment shown in FIG. 1;

FIG. 3 is a schematic view of the internal structure of the embodiment shown in FIG. 1;

FIG. 4 is a schematic view of the quick release valve installation of the embodiment of FIG. 1;

FIG. 5 is a schematic structural view of the quick release valve of the embodiment of FIG. 1;

FIG. 6 is a schematic diagram of the embodiment of FIG. 1;

in the figure: 1. the automatic control valve comprises a box cover, 2 parts of a left air inlet, 3 parts of a right air inlet, 4 parts of an air outlet, 5 parts of a feedback port, 6 parts of an air path block I, 7 parts of a box body, 8 parts of a filter valve, 9 parts of a pantograph lifting throttle valve, 10 parts of a precision pressure regulating valve, 11 parts of a pantograph lowering throttle valve, 12 parts of a pressure gauge, 13 parts of a safety valve, 14 parts of a quick discharge valve, 15 parts of a quick discharge port, 16 parts of a stop ball valve, 17 parts of a test ball valve, 18 parts of a mounting plate II, 19 parts.

Detailed Description

The invention is further explained with reference to the drawings and the embodiments.

Examples

Referring to fig. 1 to 3, the present embodiment includes a tank cover 1, a left air inlet 2, a right air inlet 3, an air outlet 4, an air path block i 6, a tank body 7, a filter valve 8, a pantograph-ascending throttle valve 9, a precision pressure-regulating valve 10, a pantograph-descending throttle valve 11, a pressure gauge 12, and a safety valve 13;

the filter valve 8, the bow-rising throttle valve 9, the precise pressure regulating valve 10, the bow-falling throttle valve 11, the pressure gauge 12 and the safety valve 13 are mutually connected through pipe joints and fixed on the mounting plate I to form a whole, namely a pressure regulating unit, the pressure regulating unit is fixed on the box body 7 through a bolt on the back mounting plate I, the pressure regulating unit is in air connection with the air outlet 4 on the air path block I6 through an air path pipe, and the left air inlet 2 and the right air inlet 3 are in air connection with the pressure regulating unit through the air path pipe;

be equipped with feedback mouth 5 on the gas circuit piece I6, be equipped with fast valve 14 in the box 7, fast valve 14 realizes the air connection through the gas circuit pipe that is equipped with by ball valve 16 and gas outlet 4 on the gas circuit piece I6, fast valve 14 realizes the air connection through feedback mouth 5 on gas circuit pipe and the gas circuit piece I6, 5 coupling hose of feedback mouth to pantograph carbon slide, make up into a whole, are called automatic bow lowering unit, inside air flue or the air cavity of being equipped with of carbon slide, during normal operating, the air flue is filled with compressed air.

In this embodiment, a test ball valve 17 is arranged on a connecting pipeline of the quick exhaust valve 14 and the feedback port 5 on the air path block I6. The test ball valve 17 is arranged on the air path block I6.

In this embodiment, a mounting plate ii 18 is arranged in the box body 7, and the quick exhaust valve 14 is fixed on the mounting plate ii 18 through a pipe joint.

In this embodiment, the quick exhaust port 15 of the quick exhaust valve 14 is equipped with a muffler 19.

In this embodiment, the filter valve 8 and the precise pressure regulating valve 10 are fixed on the mounting plate i through a bracket.

In this embodiment, the pressure gauge 12 and the safety valve 13 are fixed on the mounting plate i through the air path block ii.

In this embodiment, case lid 1 and box 7 are formed by the sheet metal component welding, and both pass through bolted connection and constitute box structure.

In this embodiment, the quick exhaust valve 14 comprises an upper cavity 14-1 and a lower cavity 14-2, which are separated by a diaphragm 14-3 and a spring 14-6, a small flow guide hole 14-4 is formed in the diaphragm 14-3 for balancing air pressure, the upper cavity 14-1 is communicated with a feedback port on an air path block i through an air path pipe in an air connection (also called an ADD air path, including a slide plate, a bow head air pipe and the like), and the lower cavity 14-2 is connected with an air inlet 14-5 and is isolated from a quick exhaust port 15 by the diaphragm 14-3.

The pantograph lifting process comprises the following steps: the compressed gas enters the main gas circuit of the pantograph and the lower cavity 14-2 of the quick exhaust valve, at the moment, because the upper cavity 14-1 is much smaller than the lower cavity 14-2, the diaphragm 14-3 will bulge upwards under the pressure action of the lower cavity 14-2, the quick exhaust valve is instantaneously in an open position, and the lower cavity 14-2 is connected with the quick exhaust port 15. Due to the existence of the diversion hole 14-4 on the diaphragm 14-3, the air pressure of the upper cavity 14-1 can rapidly rise and reach the balance with the lower cavity 14-2 under the assistance of the spring 14-6. The diaphragm 14-3 will return to its original position with the quick release valve in the closed position (this process is relatively rapid), and the air bag will continue to inflate and the pantograph will rise. Since the pressure contact area (A) of the upper chamber 14-1 of the quick release valve is greater than the pressure contact area (A-B) of the lower chamber 14-2, the pressure applied to the diaphragm 14-3 by the upper chamber 14-1 of the quick release valve will be greater than that of the lower chamber 14-2. Therefore, the quick-release valve diaphragm can seal the passage of the lower cavity 14-2 to the exhaust port, and the air tightness of the lower cavity 14-2 is well ensured, so that the normal operation of the pantograph is ensured.

The automatic pantograph descending process of the pantograph comprises the following steps: when the ADD gas circuit is damaged and the leakage amount is larger than the supply amount of the diversion hole, the pressure of the upper cavity 14-1 of the quick-release valve begins to drop. When the pressure difference between the upper cavity and the lower cavity reaches a set value, the diaphragm 14-3 is raised, the quick exhaust valve is in an opening position, compressed gas of the main gas circuit and the gas bag of the pantograph is rapidly exhausted through the quick exhaust port 15, and the pantograph is rapidly descended.

The integrated automatic air valve case that falls bow function that this embodiment provided combines automatic bow device and traditional air valve case ingeniously, carries out box overall arrangement and pipeline design again, forms neotype automatic air valve case that falls bow function of area to replace original air valve case and automatic bow device that falls. The novel air valve box is an integrated device which uses compressed gas as a working medium, controls the pantograph to lift, adjusts the contact pressure and automatically monitors the pantograph to lift.

The working principle is as follows:

1) normal lifting bow

When the locomotive gives a pantograph lifting command, compressed air enters the air valve box from the left air inlet 2 or the right air inlet 3 (the left side and the right side can be selected according to the actual pipeline arrangement of the pantograph). Compressed air flows through a pressure regulating unit consisting of a filter valve 8, a pantograph lifting throttle valve 9, a precision pressure regulating valve 10, a pantograph lifting throttle valve 11 and a safety valve 13 in sequence and then flows into an automatic pantograph lifting unit, air pressure balance of an upper cavity and a lower cavity of a quick exhaust valve 14 is quickly established, the compressed air is connected to a pantograph air bag from an air outlet 4, and normal pantograph lifting of the pantograph is realized. The pantograph lifting speed can be adjusted by a pantograph lifting throttle valve 9, a safety valve 13 is arranged in the pressure adjusting unit to play a pressure limiting protection function, and when the pressure of the gas circuit is greater than the set value of the safety valve 13, the safety valve 13 starts to release pressure to protect the gas circuit safety of the pantograph. The pressure regulating unit is also provided with a pressure gauge 12 which can observe the pressure value of the gas circuit.

2) Lowering bow normally

The locomotive gives a pantograph-lowering command, and compressed air in the pantograph air bag enters the air valve box from the air outlet 4. Compressed air is discharged from the air valve box from the left air inlet 2 or the right air inlet 3 through the automatic pantograph lowering unit and the pressure regulating unit reversely flowing through the normal pantograph raising air passage, so that the pantograph is lowered normally, and the pantograph lowering speed can be regulated by the pantograph lowering throttle valve 11.

3) Automatic bow lowering device

When the air valve box with the automatic pantograph lowering function is connected to a pantograph, the air valve box needs to be connected with a hose to a pantograph air bag from an air outlet 4, and the hose is connected with a carbon sliding plate of the pantograph from a feedback port 5.

In order to protect the contact network wire and the carbon pantograph slider from excessive wear after reaching the minimum wear limit, the gas valve box is provided with an automatic pantograph-lowering unit. If any damage (damage or excessive abrasion) of the carbon slide plate or the monitoring pipeline causes leakage of compressed gas, the air pressure of the monitoring pipeline is reduced, and the monitoring pipeline is connected with the quick discharge valve 14 through the feedback port 5; the quick exhaust valve 14 is triggered to start immediately, compressed air in the pantograph air bag enters the air valve box from the air outlet 4 and is directly and quickly exhausted to the atmosphere through the quick exhaust port 15 of the quick exhaust valve 14 (the exhaust port is provided with a silencer 19), and therefore automatic pantograph lowering of the pantograph is achieved.

The function can also be cut off by a stop ball valve 16 in the box body, and after the stop ball valve 16 is closed, the automatic pantograph-lowering unit fails, so that the automatic pantograph-lowering monitoring of the pantograph is closed. After the air valve box is installed on the pantograph, the automatic pantograph lowering function can be tested through the testing ball valve 17. After the pantograph is assembled, the testing ball valve 17 is opened to simulate the leakage of a carbon sliding plate, so that the air pressure of a pipeline is reduced, the quick exhaust valve 14 is triggered to start, and the automatic pantograph lowering of the pantograph is realized.

Claims

1. The air valve box integrated with the automatic bow lowering function comprises a box cover, a left air inlet, a right air inlet, an air outlet, an air path block I, a box body, a filter valve, a bow raising throttle valve, a pressure regulating valve, a bow lowering throttle valve, a pressure gauge and a safety valve; the filter valve, the bow-rising throttle valve, the pressure regulating valve, the bow-falling throttle valve, the pressure gauge and the safety valve are mutually connected through pipe joints and fixed on the mounting plate I to form a whole, namely a pressure regulating unit, the pressure regulating unit is fixed on the box body and is in air connection with an air outlet on the air path block I through an air path pipe, and the left air inlet and the right air inlet are in air connection with the pressure regulating unit through the air path pipe; the method is characterized in that: be equipped with the feedback mouth on the gas circuit piece I, be equipped with the fast valve of arranging in the box, the air connection is realized through the gas outlet that is equipped with on the gas circuit pipe and the gas circuit piece I of stop valve to the fast valve of arranging, the air connection is realized through the feedback mouth on gas circuit pipe and the gas circuit piece I to the fast valve of arranging, the feedback mouth is connected gas circuit pipe and is managed to pantograph carbon slide, makes up into a whole, is called automatic bow unit that falls, inside air flue or the air cavity of being equipped with of carbon slide.

2. The integrated automatic declutch function air valve box of claim 1, wherein: and a test valve is arranged on a connecting pipeline of the quick exhaust valve and a feedback port on the air path block I.

3. The integrated auto-pantograph function air valve box of claim 2, wherein: the test valve is arranged on the air path block I.

4. The integrated automatic pantograph function of claim 1, 2 or 3, wherein: and a mounting plate II is arranged in the box body, and the quick-discharge valve is fixed on the mounting plate II through a pipe joint.

5. The integrated automatic pantograph function of claim 1, 2 or 3, wherein: the quick exhaust port of the quick exhaust valve is equipped with a silencer.

6. The integrated automatic pantograph function of claim 1, 2 or 3, wherein: the filter valve and the precise pressure regulating valve are fixed on the mounting plate I through a support.

7. The integrated automatic pantograph function of claim 1, 2 or 3, wherein: the pressure gauge and the safety valve are fixed on the mounting plate I through the air path block II.

8. The integrated automatic pantograph function of claim 1, 2 or 3, wherein: the box cover and the box body are formed by welding sheet metal parts and are connected through connecting pieces to form a box-type structure.

9. The integrated automatic pantograph function of claim 1, 2 or 3, wherein: the quick exhaust valve comprises an upper cavity and a lower cavity, the upper cavity and the lower cavity are isolated through a diaphragm and a spring, a flow guide small hole is formed in the diaphragm, the upper cavity is connected with a feedback port in the air path block I through an air path pipe in an air connection mode, and the lower cavity is connected with an air inlet and is isolated from the quick exhaust port through the diaphragm.