Brake cylinder
阅读说明:本技术 一种制动缸 (Brake cylinder ) 是由 黄士伟 王令军 李培曙 宋传云 孔德鹏 刁有彬 于 2020-07-17 设计创作,主要内容包括:本发明涉及一种制动缸包括:缸体、缸盖、动力组件、前端组件和连接管;缸体包括进气腔、过渡腔、呼吸腔、进气口、呼吸连接口、排气口;动力组件将缸体分为制动室和平衡室;缸盖盖合在缸体上;缸盖上具有呼吸口;动力组件的底端容置在缸体中,顶端伸出缸盖外;前端组件套接在动力组件的顶端;连接管的一端与呼吸连接口相接,另一端与呼吸口相接;在制动缸制动时,进气腔将制动管路通过进气口输入的压缩气体经过渡腔输送至制动室,制动室扩张使得平衡室中气体被压缩,通过连接管排入呼吸腔,经排气口排入大气;在制动缸缓解时,制动室和平衡室复位,过渡腔中的残余压缩气体通过呼吸腔和连接管流入平衡室。(The present invention relates to a brake cylinder including: the cylinder comprises a cylinder body, a cylinder cover, a power assembly, a front end assembly and a connecting pipe; the cylinder body comprises an air inlet cavity, a transition cavity, a breathing cavity, an air inlet, a breathing connecting port and an air outlet; the power assembly divides the cylinder body into a braking chamber and a balancing chamber; the cylinder cover covers the cylinder body; the cylinder cover is provided with a breathing port; the bottom end of the power assembly is accommodated in the cylinder body, and the top end of the power assembly extends out of the cylinder cover; the front end component is sleeved at the top end of the power component; one end of the connecting pipe is connected with the breathing connecting port, and the other end of the connecting pipe is connected with the breathing port; when the brake cylinder brakes, the air inlet cavity conveys compressed air input by the brake pipeline through the air inlet to the brake chamber through the transition cavity, the brake chamber expands to compress the air in the balance chamber, and the compressed air is exhausted into the breathing cavity through the connecting pipe and is exhausted into the atmosphere through the exhaust port; when the brake cylinder is released, the brake chamber and the balance chamber are reset, and residual compressed gas in the transition chamber flows into the balance chamber through the breathing chamber and the connecting pipe.)
1. A brake cylinder, characterized in that the brake cylinder comprises: the cylinder comprises a cylinder body, a cylinder cover, a power assembly, a front end assembly and a connecting pipe;
the cylinder body comprises a gas circulating part arranged at a gas input end and a gas circulating part arranged at a gas output end and a power assembly movable part arranged at a power output end; the gas input and output end is provided with a gas inlet, a breathing connecting port and a gas outlet; the gas circulation unit includes: the air inlet cavity, the transition cavity and the breathing cavity; the power component movable part includes: a brake chamber and a balance chamber; a piston is arranged between the brake chamber and the balance chamber;
the cylinder cover covers the power output end; the cylinder cover is provided with a power output hole and a breathing port;
the bottom end of the power assembly is accommodated in the movable part of the power assembly, and the top end of the power assembly penetrates through the power output hole and extends out of the cylinder cover;
The front end assembly is sleeved at the top end of the power assembly and is connected with the brake clamp;
one end of the connecting pipe is connected with the breathing connecting port, and the other end of the connecting pipe is connected with the breathing port and used for communicating the breathing cavity of the gas circulating part with the balance chamber in the movable part of the power assembly;
when the brake cylinder brakes, the air inlet cavity conveys compressed air input by a brake pipeline through the air inlet to the brake chamber through the transition cavity, the brake chamber expands to compress the air in the balance chamber, and the air is exhausted into the breathing cavity through the connecting pipe and is exhausted into the atmosphere through the air outlet;
when the brake cylinder is relieved, the brake chamber and the balance chamber reset, and residual compressed gas in the transition cavity flows into the balance chamber through the breathing cavity and the connecting pipe.
2. Brake cylinder according to claim 1, characterized in that the gas circulation further comprises a valve body and a valve spool;
the valve body is of a hollow structure and comprises a cavity conduction part, a top cover and a bottom cover;
the chamber conductance portion includes a sidewall, a top end and a bottom end; the side wall is provided with an air supply channel, an air inlet channel, an exhaust channel, a breathing channel, a valve seat and a first limiting ring; the air supply channel is used for communicating an air path between the transition cavity and the brake chamber; the air inlet channel is used for communicating the air inlet and the air inlet cavity; the exhaust passage is used for communicating the breathing cavity with the exhaust port; the breathing channel is used for communicating the breathing cavity with the breathing connecting port; the valve seat is a protruding structure of the inner wall of the side wall at the joint of the air inlet cavity and the transition cavity; the first limiting ring is specifically another protruding structure of the inner wall of the side wall at the joint of the transition cavity and the breathing cavity, and the first limiting ring and the valve seat are coaxially arranged;
The top cover covers the top end of the cavity conducting part;
the bottom cover is detachably connected with the bottom end of the cavity conducting part;
the valve core is accommodated in the hollow structure, the top end of the valve core is a gas inlet end, and the bottom end of the valve core is a sealed limit end; the air inlet end sequentially penetrates through the first limiting ring and the valve seat to be located in the air inlet cavity, the sealed limiting end is located in the breathing cavity, and the outer wall of the valve core is in sliding fit with the side wall of the cavity conduction part.
3. The brake cylinder according to claim 2, characterized in that the gas circulation further comprises a first spring seat and a first spring;
the first spring base is positioned in the air inlet cavity and arranged between the top cover and the valve seat; the first spring base is a step ring and comprises a top ring, a bottom ring and an intra-ring through hole; the outer diameter of the top ring is smaller than the outer diameter of the bottom ring; the outer diameter of the bottom ring is larger than the diameter of the valve seat, so that the first spring base is matched with the valve seat to conduct/cut off an air passage between the air inlet cavity and the transition cavity; the diameter of the through hole in the ring is not less than the outer diameter of the air inlet end of the valve core;
One end of the first spring is connected with the lower surface of the top cover, and the other end of the first spring is abutted to the upper surface of the bottom ring.
4. Brake cylinder according to claim 3, characterized in that the gas circulation further comprises a second spring; the air inlet end of the valve core penetrates through the inner through hole, one end of the second spring is connected with the lower surface of the top cover, and the other end of the second spring is connected with the air inlet end of the valve core.
5. Brake cylinder according to claim 4, characterized in that the spool is a hollow cylinder, the outer wall of the spool comprising from top to bottom: the device comprises a push ring, an exhaust gas guide groove, a sealing ring and a bottom end sealing limiting ring;
the pushing ring is positioned below the air inlet end of the valve core, an air inlet guide groove is formed in the outer surface of the pushing ring, the outer diameter of the pushing ring is larger than the inner diameter of the through hole in the pushing ring, and the pushing ring is used for pushing the first spring base to leave the valve seat so as to conduct an air path between the air inlet cavity and the transition cavity;
the exhaust gas guide groove is positioned below the push ring, so that the compressed gas in the brake chamber passes through the exhaust gas guide groove, enters a breathing cavity from the transition cavity, and in the breathing cavity, a part of the compressed gas is exhausted into the atmosphere through the exhaust port, and a part of the compressed gas flows into the balance chamber through the connecting pipe, so that the brake chamber is communicated with the balance chamber and the atmosphere;
The sealing ring is positioned below the exhaust gas guide groove, the outer diameter of the sealing ring is matched with the inner diameter of the first limiting ring, and the sealing ring is used for conducting or cutting off a gas circuit between the transition cavity and the breathing cavity;
the bottom end sealing limiting ring is positioned below the sealing ring and in the breathing cavity, the bottom end sealing limiting ring is a step ring, the outer diameter of the upper step part is larger than the diameter of the first limiting ring, and the outer diameter of the lower step part is matched with the diameter of the cavity conducting part and used for limiting the distance of the valve core moving towards the top cover;
when the brake cylinder brakes, the air inlet cavity enables compressed air input by a brake pipeline through the air inlet to enter the hollow cylinder of the valve core through the air inlet end of the valve core through the air inlet channel and then is conveyed to the breathing cavity through the sealing limit end of the valve core, and a first acting force is generated on the lower surface of the bottom sealing limit ring; when the first acting force is larger than the spring force of the second spring, the valve core moves towards the top cover; when the sealing ring is connected with the first limiting ring, the air path between the transition cavity and the breathing cavity is cut off; when the first acting force is larger than the sum of the spring forces of the first spring and the second spring, the valve core pushes the first spring base to move towards the top cover, the first spring base is separated from the valve seat, and the compressed gas enters the transition cavity through the gas inlet and guide groove and then is input into the brake chamber through a gas feed channel;
When the brake cylinder is released, the compressed gas stops being input, the air pressure of the breathing cavity is reduced along with the reduction of the intake pressure, and when the first acting force is smaller than the sum of the spring forces of the first spring and the second spring, the valve core and the first spring base move towards the bottom cover under the combined action of the first spring and the second spring; when the lower surface of the first spring base is connected with the upper surface of the valve seat, the air path between the air inlet cavity and the transition cavity is cut off; when the first acting force is smaller than the spring force of the second spring, the valve core continues to move towards the bottom cover under the action of the second spring, the transition cavity is communicated with the air passage between the breathing cavities, the compressed air enters the breathing cavity through the exhaust air guide groove, part of the compressed air flows into the balance chamber through the breathing passage and then through the connecting pipe, and part of the compressed air is exhausted out of the atmosphere through the exhaust passage and the exhaust port.
6. The brake cylinder according to claim 2, characterized in that the gas circulation further comprises a check spool disposed within the exhaust passage.
7. Brake cylinder according to claim 1, characterized in that the gas circulation further comprises a muffler, which is arranged outside the exhaust port.
8. The brake cylinder according to claim 3, characterized in that the first spring seat further has a notch; the notch is arranged on the outer edge of the bottom ring.
Technical Field
The invention relates to the technical field of vehicle braking devices, in particular to a brake cylinder.
Background
The rail transit vehicle is generally provided with an air brake system as the most basic guarantee for realizing speed regulation and parking. The brake cylinder is used as an end actuator of the air brake system and can convert the pressure of compressed air into mechanical thrust. After the mechanical thrust is amplified by the braking clamp, the kinetic energy is converted into heat energy through the interaction between the brake pad and the brake disc, so that the locomotive vehicle is braked.
The brake cylinder is generally divided into two parts, a brake chamber and a balance chamber. In the braking and relieving process of the brake cylinder, the balance chamber is mainly exchanged with the outside air through the respirator, so that the balance with the atmospheric pressure is realized. During braking, compressed air enters the braking chamber, pushes components in the braking cylinder to move towards the balance chamber, reduces the volume in the balance chamber, and exhausts air to the atmosphere through the respirator; when the brake is released, compressed air in the brake cylinder is exhausted, the components in the brake cylinder move towards the direction of the brake chamber, the volume of the balance chamber is increased, and the balance chamber sucks air. During the process of air suction in the balancing chamber, moisture substances such as water vapor in the atmosphere can be sucked into the balancing chamber. When the temperature of the external environment is low, the water-containing substances such as water vapor and the like sucked into the balance chamber can be attached to the inner wall of the brake cylinder and frozen because the water-containing substances cannot be discharged in time. Along with the accumulation of the ice layer, the sealing failure between the brake chamber and the balance chamber is caused, so that high-pressure gas in the brake chamber enters the balance chamber, namely, the brake cylinder cannot maintain pressure, the brake function is weakened or even fails, and the driving safety is influenced.
Disclosure of Invention
The invention aims to provide a brake cylinder, aiming at the defects in the prior art, wherein the balance chamber exhausts air to the atmosphere during braking, and part of residual gas in the brake chamber can be sucked into the balance chamber during relieving so as to maintain the air pressure balance in the brake cylinder and effectively avoid the risk that the brake cylinder is possibly frozen due to water inflow.
To achieve the above object, the present invention provides a brake cylinder including: the cylinder comprises a cylinder body, a cylinder cover, a power assembly, a front end assembly and a connecting pipe;
the cylinder body comprises a gas circulating part arranged at a gas input end and a gas circulating part arranged at a gas output end and a power assembly movable part arranged at a power output end; the gas input and output end is provided with a gas inlet, a breathing connecting port and a gas outlet; the gas circulation unit includes: the air inlet cavity, the transition cavity and the breathing cavity; the power component movable part includes: a brake chamber and a balance chamber; a piston is arranged between the brake chamber and the balance chamber;
the cylinder cover covers the power output end; the cylinder cover is provided with a power output hole and a breathing port;
the bottom end of the power assembly is accommodated in the movable part of the power assembly, and the top end of the power assembly penetrates through the power output hole and extends out of the cylinder cover;
the front end assembly is sleeved at the top end of the power assembly and is connected with the brake clamp;
one end of the connecting pipe is connected with the breathing connecting port, and the other end of the connecting pipe is connected with the breathing port and used for communicating the breathing cavity of the gas circulating part with the balance chamber in the movable part of the power assembly;
when the brake cylinder brakes, the air inlet cavity conveys compressed air input by a brake pipeline through the air inlet to the brake chamber through the transition cavity, the brake chamber expands to compress the air in the balance chamber, and the air is exhausted into the breathing cavity through the connecting pipe and is exhausted into the atmosphere through the air outlet;
When the brake cylinder is relieved, the brake chamber and the balance chamber reset, and residual compressed gas in the transition cavity flows into the balance chamber through the breathing cavity and the connecting pipe.
Preferably, the gas circulation part further comprises a valve body and a valve core;
the valve body is of a hollow structure and comprises a cavity conduction part, a top cover and a bottom cover;
the chamber conductance portion includes a sidewall, a top end and a bottom end; the side wall is provided with an air supply channel, an air inlet channel, an exhaust channel, a breathing channel, a valve seat and a first limiting ring; the air supply channel is used for communicating an air path between the transition cavity and the brake chamber; the air inlet channel is used for communicating the air inlet and the air inlet cavity; the exhaust passage is used for communicating the breathing cavity with the exhaust port; the breathing channel is used for communicating the breathing cavity with the breathing connecting port; the valve seat is a protruding structure of the inner wall of the side wall at the joint of the air inlet cavity and the transition cavity; the first limiting ring is specifically another protruding structure of the inner wall of the side wall at the joint of the transition cavity and the breathing cavity, and the first limiting ring and the valve seat are coaxially arranged;
the top cover covers the top end of the cavity conducting part;
The bottom cover is detachably connected with the bottom end of the cavity conducting part;
the valve core is accommodated in the hollow structure, the top end of the valve core is a gas inlet end, and the bottom end of the valve core is a sealed limit end; the air inlet end sequentially penetrates through the first limiting ring and the valve seat to be located in the air inlet cavity, the sealed limiting end is located in the breathing cavity, and the outer wall of the valve core is in sliding fit with the side wall of the cavity conduction part.
Further preferably, the gas circulation portion further comprises a first spring seat and a first spring;
the first spring base is positioned in the air inlet cavity and arranged between the top cover and the valve seat; the first spring base is a step ring and comprises a top ring, a bottom ring and an intra-ring through hole; the outer diameter of the top ring is smaller than the outer diameter of the bottom ring; the outer diameter of the bottom ring is larger than the diameter of the valve seat, so that the first spring base is matched with the valve seat to conduct/cut off an air passage between the air inlet cavity and the transition cavity; the diameter of the through hole in the ring is not less than the outer diameter of the air inlet end of the valve core;
one end of the first spring is connected with the lower surface of the top cover, and the other end of the first spring is abutted to the upper surface of the bottom ring.
Still further preferably, the gas circulation portion further includes a second spring; the air inlet end of the valve core penetrates through the inner through hole, one end of the second spring is connected with the lower surface of the top cover, and the other end of the second spring is connected with the air inlet end of the valve core.
Still further preferably, the valve core is a hollow cylinder, and the outer wall of the valve core comprises, from top to bottom: the device comprises a push ring, an exhaust gas guide groove, a sealing ring and a bottom end sealing limiting ring;
the pushing ring is positioned below the air inlet end of the valve core, an air inlet guide groove is formed in the outer surface of the pushing ring, the outer diameter of the pushing ring is larger than the inner diameter of the through hole in the pushing ring, and the pushing ring is used for pushing the first spring base to leave the valve seat so as to conduct an air path between the air inlet cavity and the transition cavity;
the exhaust gas guide groove is positioned below the push ring, so that the compressed gas in the brake chamber passes through the exhaust gas guide groove, enters the breathing cavity from the transition cavity, and in the breathing cavity, a part of the compressed gas is exhausted into the atmosphere through the exhaust port, and a part of the compressed gas flows into the balance chamber through the connecting pipe, so that the brake chamber is communicated with the balance chamber and the atmosphere;
The sealing ring is positioned below the exhaust gas guide groove, the outer diameter of the sealing ring is matched with the inner diameter of the first limiting ring, and the sealing ring is used for conducting or cutting off a gas circuit between the transition cavity and the breathing cavity;
the bottom end sealing limiting ring is positioned below the sealing ring and in the breathing cavity, the bottom end sealing limiting ring is a step ring, the outer diameter of the upper step part is larger than the diameter of the first limiting ring, and the outer diameter of the lower step part is matched with the diameter of the cavity conducting part and used for limiting the distance of the valve core moving towards the top cover;
when the brake cylinder brakes, the air inlet cavity enables compressed air input by a brake pipeline through the air inlet to enter the hollow cylinder of the valve core through the air inlet end of the valve core through the air inlet channel and then is conveyed to the breathing cavity through the sealing limit end of the valve core, and a first acting force is generated on the lower surface of the bottom sealing limit ring; when the first acting force is larger than the spring force of the second spring, the valve core moves towards the top cover; when the sealing ring is connected with the first limiting ring, the air path between the transition cavity and the breathing cavity is cut off; when the first acting force is larger than the sum of the spring forces of the first spring and the second spring, the valve core pushes the first spring base to move towards the top cover, the first spring base is separated from the valve seat, and the compressed gas enters the transition cavity through the gas inlet and guide groove and then is input into the brake chamber through a gas feed channel;
When the brake cylinder is released, the compressed gas stops being input, the air pressure of the breathing cavity is reduced along with the reduction of the intake pressure, and when the first acting force is smaller than the sum of the spring forces of the first spring and the second spring, the valve core and the first spring base move towards the bottom cover under the combined action of the first spring and the second spring; when the lower surface of the first spring base is connected with the upper surface of the valve seat, the air path between the air inlet cavity and the transition cavity is cut off; when the first acting force is smaller than the spring force of the second spring, the valve core continues to move towards the bottom cover under the action of the second spring, the transition cavity is communicated with the air passage between the breathing cavities, the compressed air enters the breathing cavities through the exhaust air guide grooves, a part of the compressed air flows into the balance chamber through the breathing channels and then through the connecting pipe, and a part of the compressed air is exhausted out of the atmosphere through the exhaust channels and the exhaust ports.
Further preferably, the gas circulation unit further includes a check valve spool disposed in the exhaust passage.
Preferably, the gas circulation portion further includes a muffler disposed outside the gas discharge port.
Still further preferably, the first spring seat further has a notch; the notch is arranged on the outer edge of the bottom ring.
According to the brake cylinder provided by the embodiment of the invention, through the arrangement of the structures such as the air inlet cavity, the transition cavity, the breathing cavity, the air inlet, the exhaust port, the breathing connector and the connecting pipe, when the brake cylinder brakes, compressed air is conveyed to the brake chamber through the air inlet cavity, the air inlet cavity and the transition cavity, the brake chamber expands to enable the air in the balance chamber to be compressed and exhausted into the breathing cavity through the connecting pipe, and the air is exhausted into the atmosphere through the exhaust port in the breathing cavity, so that the requirement that the balance chamber exhausts into the atmosphere is met. When the brake cylinder is released, part of residual compressed gas in the brake chamber flows into the balance chamber through the transition cavity, the breathing cavity and the connecting pipe, and a gas source in the balance chamber is from a brake pipeline, so that the quality is guaranteed, the problem that the balance chamber absorbs water vapor from the atmosphere in the release process of the brake cylinder can be effectively solved, and the risk that the brake cylinder is possibly frozen due to water inflow is avoided; and a part of the air is discharged into the atmosphere through the transition cavity, the breathing cavity and the exhaust port, so that the residual air in the brake chamber is completely exhausted. In addition, since the residual gas in the brake chamber is discharged through the exhaust port, the time required for discharging the residual gas in the brake chamber through the brake line and the brake valve is shortened as compared with the conventional brake cylinder, and the brake cylinder release acceleration effect can be achieved.
Drawings
FIG. 1 is a sectional structural view of a brake cylinder according to an embodiment of the present invention;
FIG. 2 is a cross-sectional structural view of a gas input/output port and a gas circulation unit according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a partial structure of a valve body of a gas circulation portion according to an embodiment of the present invention;
FIG. 4-A is a schematic structural diagram of a valve cartridge provided in an embodiment of the present invention;
FIG. 4-B is a cross-sectional view of a valve cartridge provided in accordance with an embodiment of the present invention;
FIG. 5-A is a front side view of a first spring mount provided in accordance with an embodiment of the present invention;
FIG. 5-B is a rear side view of a first spring mount provided in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a position movement state of a valve element according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a position motion state of a valve element according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The brake cylinder provided by the embodiment of the invention can be used in an air brake system of a rail transit vehicle, is used as a tail end actuating mechanism of the air brake system, is connected with a brake clamp, and can convert the pressure of compressed air into mechanical thrust to the brake clamp. It should be noted that the compressed gas in the brake cylinder according to the embodiment of the present invention is supplied through the brake pipe.
Fig. 1 is a sectional structural diagram of a brake cylinder according to an embodiment of the present invention. As shown in fig. 1, the brake cylinder includes: the
The
The gas input/
The gas circulation portion 11 is a main channel for gas exchange between the gas input/
The pressure of the gas in the gas circulation portion 11 is converted into mechanical thrust at the
The power unit
In order to effectively cut off the path of the
The power module 3 is a main mechanism for converting the pressure of the compressed gas in the power
The front end assembly 4 is sleeved at the top end of the power assembly 3 and is connected with a brake clamp (not shown in the figure) to push the brake clamp to move.
The main components of the brake cylinder and their connections have been described above, and the operating principle of the brake cylinder will be described below.
During braking of the brake cylinder, compressed gas input from the brake pipeline through the
When the brake cylinder is released, the brake pipeline stops inputting compressed gas into the
In a preferred embodiment, as further shown in fig. 2 and 3, the delivery of gas in the gas circulation portion 11 may be achieved by the cooperation of the valve body 115 and the
Valve body 115 is a hollow structure including a chamber conductance 1151, a
The chamber conductance 1151 includes a
The
The
The
The
The
The first stop collar 600 is embodied as another raised structure on the inner wall of the
The
The valve body 115 effects the delivery of gas by the movement of the
In a specific embodiment, the
The pushing
The
The
The bottom sealing limiting
In a preferred embodiment, in order to control the cutting off and communication of the air path between the chambers of the gas circulation unit 11 in cooperation with the
The first spring seat 117 is located within the
The outer diameter of the top ring 1171 is smaller than the outer diameter of the bottom ring 1172.
The outer diameter of the bottom ring 1172 is larger than the diameter of the
The diameter of the in-ring through hole 1173 is not less than the outer diameter of the
Referring again to FIG. 2, the first spring 118 has one end in contact with the lower surface of the top 1152 and the other end in contact with the upper surface of the bottom ring 1172. The first spring 118 may be a cylindrical spring.
In a more preferred embodiment, a second spring 119 is further provided to control the change of the gas pressure in the gas circulation portion 11. The
The valve body 115, the
Fig. 6 is a schematic diagram illustrating a position movement state of the valve element according to an embodiment of the present invention. Referring to fig. 2 and 6, when the brake cylinder brakes, the air inlet cavity 111 allows compressed air input from the brake pipe through the air inlet 101 to enter the hollow cylinder of the valve core 116 through the air inlet channel 100 via the air inlet end 1161 of the valve core 116, and then to be delivered to the lower chamber 1132 of the breathing cavity 113 via the sealing limit end 1162 of the valve core 116, so that the compressed air generates a first acting force on the lower surface of the bottom sealing limit ring 11672; when the first force is greater than the spring force of second spring 119, spool 116 moves toward head 1152; when the sealing ring 1166 is connected to the first stop collar 600, the air path between the upper chamber 1131 of the breathing cavity 113 and the transition cavity 112 is cut off; when the first acting force is larger than the sum of the spring forces of the first spring 118 and the second spring 119, the valve core 116 pushes the first spring seat 117 to move toward the top cover 1152, the first spring seat 117 separates from the valve seat 500, and the compressed gas enters the transition cavity 112 through the gas inlet and guide groove 11641 and then is delivered into the brake chamber 131 through the gas delivery channel 200.
Fig. 7 is a second schematic diagram of a position movement state of the valve core provided by the embodiment of the present invention, and as shown in fig. 2 and 7, when the brake cylinder is released, the compressed gas stops being input, the gas pressure in the lower chamber 1132 of the breathing cavity 113 decreases with the decrease of the intake pressure, the first acting force generated by the compressed gas on the lower surface of the bottom end sealing limiting ring 11672 decreases, and when the first acting force is smaller than the sum of the spring forces of the first spring 118 and the second spring 119, the valve core 116 and the first spring seat 117 move toward the bottom cover 1153 under the combined action of the first spring 118 and the second spring 119; when the lower surface of the first spring seat 117 is attached to the upper surface of the valve seat 500, the air path between the air inlet chamber 111 and the transition chamber 112 is cut off; with the continuous reduction of the gas pressure, when the first acting force is smaller than the spring force of the second spring 119, the valve core 116 continues to move towards the bottom cover 1153 under the action of the second spring 119, the gas path between the transition cavity 112 and the upper chamber 1131 of the breathing cavity 113 is communicated, the compressed gas of the brake chamber 131 enters the upper chamber 1131 of the breathing cavity 113 through the exhaust gas guide groove 1165, a part of the compressed gas flows into the balance chamber 132 through the breathing channel 400 and then through the connecting pipe 5, and the gas source in the balance chamber 132 comes from the brake pipeline, so that the quality is guaranteed, the problem that the balance chamber 132 absorbs water vapor from the atmosphere in the brake cylinder relieving process can be effectively solved, and the risk that the brake cylinder is possibly frozen due to water inflow is avoided; the other part of the compressed gas passes through the one-way valve core 700 and the exhaust passage 300, passes through the exhaust port 103, is silenced by the silencer 114, and is exhausted to the atmosphere.
According to the brake cylinder provided by the embodiment of the invention, through the arrangement of the structures such as the air inlet cavity, the transition cavity, the breathing cavity, the air inlet, the exhaust port, the breathing connector and the connecting pipe, when the brake cylinder brakes, compressed air is conveyed to the brake chamber through the air inlet cavity, the air inlet cavity and the transition cavity, the brake chamber expands to enable the air in the balance chamber to be compressed and exhausted into the breathing cavity through the connecting pipe, and the air is exhausted into the atmosphere through the exhaust port in the breathing cavity, so that the requirement that the balance chamber exhausts into the atmosphere is met. When the brake cylinder is released, part of residual compressed gas in the brake chamber flows into the balance chamber through the transition cavity, the breathing cavity and the connecting pipe, and a gas source in the balance chamber is from a brake pipeline, so that the quality is guaranteed, the problem that the balance chamber absorbs water vapor from the atmosphere in the release process of the brake cylinder can be effectively solved, and the risk that the brake cylinder is possibly frozen due to water inflow is avoided; and a part of the air is discharged into the atmosphere through the transition cavity, the breathing cavity and the exhaust port, so that the residual air in the brake chamber is completely exhausted. In addition, since the residual gas in the brake chamber is discharged through the exhaust port, the time required for discharging the residual gas in the brake chamber through the brake line and the brake valve is shortened as compared with the conventional brake cylinder, and the brake cylinder release acceleration effect can be achieved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
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