CN108278407B - Automatic drain valve of reservoir - Google Patents
Automatic drain valve of reservoir Download PDFInfo
- Publication number
- CN108278407B CN108278407B CN201810126189.7A CN201810126189A CN108278407B CN 108278407 B CN108278407 B CN 108278407B CN 201810126189 A CN201810126189 A CN 201810126189A CN 108278407 B CN108278407 B CN 108278407B
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- cavity
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- valve body
- valve
- drain valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
- F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
- F16K31/22—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve with the float rigidly connected to the valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
Abstract
The invention relates to an automatic drain valve of a wind cylinder, which comprises a valve body, an elastic template, an isolating body, an operating rod assembly, a floating ball and a safety assembly, wherein the elastic template and the isolating body are arranged in the valve body up and down and divide the valve body into an isobaric cavity, a variable pressure cavity and a water collecting cavity, the isobaric cavity is respectively communicated with the wind cylinder, a drain valve port is arranged at the bottom of the valve body, a main spring is arranged between the elastic template and the isolating body, the safety assembly is used for selectively communicating or disconnecting the variable pressure cavity with the outside atmosphere, the top and the bottom of the operating rod assembly are respectively connected with the elastic template and the drain valve port, the floating ball senses the water level of the water collecting cavity and connects or disconnects the water collecting cavity and the variable pressure cavity, and the elastic template drives the operating rod assembly to move up and down according to the difference of the sum of the pressure of the isobaric cavity and the pressure of the variable pressure cavity and the top force of the main spring so as to open or close the drain valve port. The invention has simple structure, stable performance, strong adaptability and low cost, belongs to a pure mechanical full-automatic air cylinder drain valve, and can be more suitable for severe use environments.
Description
Technical Field
The invention relates to a wind cylinder, in particular to an automatic drain valve of the wind cylinder.
Background
All wind sources in the rail vehicle braking systems such as high-speed rail and the like adopt wind source purifying devices to implement drainage and purification, but water still exists in a wind cylinder, and sometimes the braking performance of a train is affected. Therefore, the requirement of the air cylinder for periodic water drainage is clearly listed in the train operation guarantee regulations, the existing vehicle adopts a mode of arranging special persons to periodically complete the work of the air cylinder for water drainage, because the chassis of the high-speed railway vehicle is full of various devices, the air cylinder is arranged on the central line of the chassis of the vehicle and is difficult to reach, and special tools are arranged for achieving the task, so that the labor intensity of the whole water drainage process is high, and the efficiency is low. In order to release manpower, improve efficiency and perfect the functions of a braking system, an automatic drainage valve of a wind cylinder is necessary to be designed.
Disclosure of Invention
The invention mainly solves the technical problem of providing the automatic drain valve of the air cylinder, which has the advantages of simple structure and stable performance and is particularly suitable for severe use environments.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the utility model provides an automatic drain valve of reservoir, includes valve body, elastic form board, isolator, control lever subassembly, floater and security component, elastic form board and isolator set up from top to bottom in the valve body and separate into three cavity with the valve body in, be equal pressure chamber above the elastic form board, be the vary voltage chamber between elastic form board and the isolator, the below of isolator is the water collecting chamber, the water collecting chamber is through communicating pipe and reservoir bottom intercommunication, equal pressure chamber is used for introducing the high-pressure air of reservoir through the induced air pipe and reservoir intercommunication the bottom of valve body sets up the drainage valve port elastic form board and isolator between install the main spring, security component is used for selectively communicating or breaking off pressure chamber and external atmosphere through the high-pressure air of reservoir of introducing with equal pressure chamber and pressure chamber intercommunication respectively, the control lever subassembly passes the isolator and moves in water collecting chamber and vary voltage chamber, the top and elastic form board fixed connection of control lever subassembly, the bottom through be connected with the reservoir bottom valve plug of reservoir bottom, water level sensing water level chamber and valve port and pressure of air inlet and floater top pressure sensor and pressure sensor are connected with the top pressure sensor spring or the pressure sensor of the top of pressure sensor assembly and the pressure sensor to close the valve opening or the main spring and the pressure sensor.
Further, the valve body comprises an upper valve body and a lower valve body, the elastic template is arranged between the upper valve body and the lower valve body, and the upper valve body, the lower valve body and the elastic template are fixedly connected together through screws.
Further, the control rod assembly comprises a pull rod, a connecting bowl and a connecting plate which are sequentially connected from top to bottom, the floating ball is installed inside the connecting bowl, the top end of the pull rod is fixedly connected with the elastic formwork, the main spring is sleeved on the outer side of the pull rod, a through hole for communicating the water collecting cavity with the pressure changing cavity is formed in the pull rod, an air inlet flow limiting plug is arranged at the through hole, and the floating ball rises or falls along with the water level to open or close the air inlet flow limiting plug so as to realize the on-off between the water collecting cavity and the pressure changing cavity.
Further, the connecting plate is provided with a water permeable hole, and water in the water collecting cavity enters the connecting bowl through the water permeable hole.
Further, a connecting bowl vent hole is arranged on the connecting bowl.
Further, an upper layer of template clamping plate and a lower layer of template clamping plate are arranged between the top of the pull rod and the elastic template, the top of the pull rod is provided with external threads, and the top of the pull rod passes through the lower layer of template clamping plate, the elastic template and the upper layer of template clamping plate from bottom to top and then is fixedly connected through nuts.
Further, the isolator is hollow annular structure, sealing connection between isolator and the inner wall of valve body has the cavity down in the center of isolator, main spring installs in the cavity.
Further, the security component comprises a shell, a security spring, a pressure maintaining piston, an isolating plug and an exhaust flow limiting plug are arranged in the shell from top to bottom, a space between the pressure maintaining piston and the isolating plug is communicated with the isobaric cavity through an upper vent hole, a space below the isolating plug is communicated with the pressure changing cavity through a lower vent hole, and the pressure maintaining piston moves up and down to open and close the exhaust flow limiting plug to realize on-off between the pressure changing cavity and the external atmosphere.
Furthermore, an adjusting bolt is sleeved outside the safety spring, and the adjusting bolt is connected with the shell through threads.
Further, a screw hole for adjusting the initial pressure of the security spring is provided above the adjusting bolt.
In summary, the automatic drain valve of the air cylinder provided by the invention has the advantages of simple structure, stable performance, strong adaptability and low cost, the floating ball senses whether water is accumulated in the air cylinder, the valve plug is controlled to open or close the drain valve port by using the air source as power, the pressure in the air cylinder and the spring force are utilized to resist, the pressure of the air cylinder is maintained, and the drain valve belongs to a pure mechanical full-automatic air cylinder drain valve, does not need a power supply, and can be more suitable for severe use environments.
The invention can be applied to the brake system of rail vehicles such as high-speed rail and the like, and can also be applied to a wind cylinder carried by any air compressor.
Drawings
FIG. 1 is a block diagram of a drain valve of the present invention;
FIG. 2 is a structural cross-sectional view of the drain valve of the present invention;
FIG. 3 is a block diagram of a joystick assembly of the present invention.
As shown in fig. 1 to 3, the upper valve body 1, the lower valve body 2, the elastic formwork 3, the screw 4, the spacer 5, the main spring 6, the water collecting chamber 7, the pressure changing chamber 8, the isopiestic chamber 9, the seal groove 10, the mounting table 11, the concave cavity 12, the operating lever assembly 13, the floating ball 14, the water draining valve port 15, the valve plug 16, the pull rod 17, the connecting bowl 18, the connecting plate 19, the air intake restrictor plug 20, the formwork clamping plate 21, the nut 22, the step structure 23, the through hole 24, the restrictor hole 25, the valve plug pull rod 26, the communicating pipe 27, the connecting bowl vent hole 28, the water permeable hole 29, the security component 30, the security spring 31, the pressure maintaining piston 32, the spacer plug 33, the air exhaust restrictor plug 34, the upper vent hole 35, the lower vent hole 36, the air bleed pipe 37, the adjusting bolt 38, the threaded hole 39, the air cylinder 40, and the filter pipe 41.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
as shown in fig. 1 to 3, the automatic drain valve of the air cylinder provided by the invention comprises a valve body, wherein the valve body is preferably in a split type structure for maintenance convenience and consists of an upper valve body 1 and a lower valve body 2, and the upper valve body 1 and the lower valve body 2 are fixedly connected through a plurality of screws 4. An elastic template 3 is installed between the upper valve body 1 and the lower valve body 2, the elastic template 3 is also fixed between the upper valve body 1 and the lower valve body 2 through screws 4, the elastic template 3 is preferably made of rubber materials and plays a role in sealing after installation, a drainage valve port 15 for drainage is arranged at the bottom of the lower valve body 2, the top of the upper valve body 1 is fixedly connected with a wind cylinder 40, and water in the wind cylinder 40 is drained through the drainage valve port 15 at the bottom.
An isolator 5 is fixedly arranged in the lower valve body 2, the isolator 5 isolates the inner space of the lower valve body 2 into an upper space and a lower space, the space above the isolator 5, namely the space between the isolator 5 and the elastic template 3 is a variable pressure cavity 8, and the space below the isolator 5 is a water collecting cavity 7. The space inside the upper valve body 1 above the elastic template 3 is an isobaric cavity 9, the upper part of the isobaric cavity 9 is communicated with the middle part of the air cylinder 40 through an air guide pipe 37, and the air guide pipe 37 is used for introducing anhydrous high-pressure air in the air cylinder 40.
The isolator 5 is hollow annular structure, is provided with upper and lower twice seal groove 10 on annular structure's outer wall, installs joint strip in seal groove 10, and the protrusion has round mount table 11 to the center on the inner wall of lower valve body 2, and mount table 11 is used for prescribing a limit to isolator 5's mounted position, and isolator 5's bottom card is fixed on mount table 11.
The control rod assembly 13 and the floating ball 14 are arranged in the lower valve body 2, the floating ball 14 is used for detecting the water level in the water collecting cavity 7, and the control rod assembly 13 is matched with the floating ball 14 to control the opening and closing of the water draining valve port 15 according to the water level in the water collecting cavity 7. The top of the operating rod assembly 13 is fixedly connected with the elastic template 3, and the operating rod assembly 13 can move up and down in the lower valve body 2. The bottom of the control rod assembly 13 is connected with a valve plug 16 for opening and closing the water drain valve port 15, and when the control rod assembly 13 moves up and down, the valve plug 16 is driven to move so as to realize the opening and closing of the water drain valve port 15.
The control rod assembly 13 comprises a pull rod 17, a connecting bowl 18 and a connecting plate 19 which are sequentially connected from top to bottom, and the floating ball 14 is arranged in the connecting bowl 18. The top of the pull rod 17 passes through the elastic template 3 and is fixedly connected with the elastic template 3, in order to ensure the fixation firmness and the sealing performance, a template clamping plate 21 is respectively fixed on the upper surface and the lower surface of the elastic template 3, and the top of the pull rod 17 is provided with external threads. The top of the pull rod 17 sequentially passes through the lower template clamping plate 21, the elastic template 3 and the upper template clamping plate 21 and is fixed by a top nut 22. A step structure 23 is provided on the tie rod 17 for defining the installation position of the lower template chuck plate 21.
The center of the isolator 5 is provided with a circular concave cavity 12 which is concave downwards, the concave cavity 12 is communicated with the transformation cavity 8, a pull rod 17 is arranged in the center of the concave cavity 12 in a penetrating way, and an upper sealing rubber strip and a lower sealing rubber strip are arranged between the pull rod 17 and the isolator 5. The pull rod 17 is sleeved with a main spring 6, the bottom of the main spring 6 is limited on the bottom wall of the central concave cavity 12 of the isolating body 5, and the top of the main spring 6 is contacted with a template clamping plate 21 below the elastic template 3.
The pull rod 17 is provided with a through hole 24 for communicating the water collecting cavity 7 and the pressure changing cavity 8, the through hole 24 is provided with a part extending along the vertical direction, the top end of the part is a blind hole, and a plurality of horizontal through holes are arranged at the upper part of the vertical part of the through hole 24 so as to communicate the water collecting cavity 7 with the pressure changing cavity 8. An air inlet restrictor 20 with a restrictor orifice 25 is mounted at the bottom of the vertical portion of the through hole 24, and the bottom of the air inlet restrictor 20 abuts against the top of the float 15.
The connecting bowl 18 is of an inverted bowl-shaped structure, the top of the connecting bowl 18 is welded with the bottom of the pull rod 17, the connecting plate 19 is fixedly connected to the bottom of the connecting bowl 18 through screws, the center of the connecting plate 19 is fixedly connected with the valve plug pull rod 26 through a welding mode, and the bottom end of the valve plug pull rod 26 is connected with the valve plug 16. In this embodiment, a connection bowl vent 28 is provided at the upper part of the connection bowl 18, a plurality of water permeable holes 29 are provided on the connection plate 19, and the connection bowl 18 and the connection plate 19 are fastened by screws after the floating ball 14 is put in between. The water flowing in through the communication pipe 27 enters the inside of the connection bowl 18 through the water penetration hole 29 for floating the float ball 14.
The water collecting cavity 7 is communicated with the bottom of the air cylinder 40 through a communicating pipe 27 arranged on one side, the communicating pipe 27 is used for introducing water in the air cylinder 40 into the water collecting cavity 7, a filter pipe 41 is arranged in the air cylinder 40, the filter pipe 41 is wrapped on the outer side of the air entraining pipe 37, and water enters the communicating pipe 27 after passing through the filter pipe 41. The communicating pipe 27 corresponds to the upper valve body 1 and the lower valve body 2, and also adopts a split structure, wherein the upper half part of the communicating pipe 27 is integrally formed with the upper valve body 1, the lower half part of the communicating pipe 27 is integrally formed with the lower valve body 2, and the upper half part and the lower half part of the communicating pipe 27 are fixedly connected through screws. The elastic templates 3 extend outwards to the communicating pipe 27, and the elastic templates 3 are also arranged between the upper half part and the lower half part of the communicating pipe 27, so that the sealing effect is achieved.
The other side opposite to the communicating pipe 27 is provided with a security component 30, and the security component 30 is composed of an upper part and a lower part, which are the same as the communicating pipe 27, and the elastic template 3 and the upper part and the lower part of the security component 30 are fixedly connected together through screws.
The safety assembly 30 includes a housing in which a safety spring 31, a pressure maintaining piston 32, a spacer 33, and an exhaust air flow limiting plug 34 are installed from top to bottom. The isolation plug 33 divides the internal space of the security assembly 30 into an upper portion and a lower portion, and an upper vent hole 35 and a lower vent hole 36 are respectively provided on the side walls of the upper portion and the lower portion, the upper vent hole 35 is used for communicating the space between the pressure maintaining piston 32 and the isolation plug 33 in the security assembly 30 with the isostatic cavity 9, and the lower vent hole 36 is used for communicating the space below the isolation plug 33 in the security assembly 30 with the pressure transformation cavity 8. The lower end of the pressure maintaining piston 32 passes through the isolating plug 33 to be in contact with the exhaust air flow limiting plug 34, and is used for opening and closing a flow limiting hole in the exhaust air flow limiting plug 34, and the flow limiting hole is opened and closed by the up-and-down movement of the pressure maintaining piston 32.
The pressure maintaining piston 32, the isolating plug 33, the exhaust air flow limiting plug 34 and the shell are all in sealing connection, an upper sealing groove and a lower sealing groove are all arranged, and sealing rubber strips are arranged in the sealing grooves.
An adjusting bolt 38 is sleeved outside the safety spring 31, the adjusting bolt 38 is connected with the shell of the safety assembly 30 through threads, a threaded hole 39 is arranged above the adjusting bolt 38, and the initial pressure of the safety spring 31 can be adjusted by operating the threaded hole 39.
The security assembly 30 operates as follows:
in the pressurization process, as the space between the lower end of the pressure maintaining piston 32 and the isolating plug 33 is communicated with the isobaric cavity 9 through the upper vent hole 35, the pressure is not established yet, the pressure maintaining piston 32 is maintained in the state shown in fig. 1 under the action of the safety spring 31, the bottom end of the pressure maintaining piston 32 abuts against the exhaust air flow limiting plug 34, and the flow limiting hole on the exhaust air flow limiting plug 34 is in a closed state.
As the pressure in the air cylinder 40 increases, the pressure in the pressure-holding cavity 9 increases, so that the pressure at the lower end of the pressure-holding piston 32 increases, thereby pushing the pressure-holding piston 32 to move upwards, opening the flow limiting hole on the air exhaust flow limiting plug 34, and as the lower vent 36 communicates the pressure-changing cavity 8 with the space below the isolating plug 33, the pressure-changing cavity 9 in the lower valve body 2 is communicated with the outside atmosphere, the pressure in the pressure-changing cavity 9 decreases, and the water discharge valve starts to work.
When the air compressor stops working, the pressure at the lower ends of the air cylinder 40, the isobaric cavity 9 and the pressure maintaining piston 32 is reduced, the pressure maintaining piston 32 moves downwards to close the flow limiting hole on the air exhaust flow limiting plug 34, and the air cylinder drain valve stops working. The pressure of the automatic drain valve of the high-speed rail air cylinder for starting and stopping working can be changed by adjusting the adjusting bolt 38, so that the purpose of pressure maintaining is achieved.
When the air cylinder is empty, the pressure in the water collecting cavity 7 and the pressure in the equal pressure cavity 9 are the same, the air pressure in the pressure changing cavity 8 depends on the sizes of the flow limiting holes on the air inlet flow limiting plug 20 and the air outlet flow limiting plug 34, and if the sizes of the two holes are the same, the air pressure in the pressure changing cavity 8 is equal to half of the pressure of the water collecting cavity 7.
The operation process of the drain valve is as follows:
before the operation of the drain valve, the sum of the top force of the main spring 6 and the air pressure in the pressure changing cavity 8 is against the air pressure in the isobaric cavity 9, and overcomes the friction resistance and ensures that the drain valve port 15 remains closed.
When the water level in the water collecting cavity 7 rises, the floating ball 14 gradually approaches to and blocks the flow limiting hole 25 on the air inlet flow limiting plug 20, air pressure in the pressure changing cavity 8 is discharged through the lower vent hole 36 and the flow limiting hole on the air exhaust flow limiting plug 34, at the moment, the top force of the main spring 6 is insufficient to resist the pressure in the isobaric cavity 9, namely, the pressure in the isobaric cavity 9 is greater than the sum of the top force of the main spring 6 and the pressure in the pressure changing cavity 8, and the elastic template 3 drives the control rod assembly 13 to move downwards, so that the water draining valve port 15 at the bottom is opened to realize water draining.
When the water level in the water collecting cavity 7 drops, the floating ball 14 falls and leaves the flow limiting hole on the air inlet flow limiting plug 20, the air pressure in the pressure changing cavity 8 rises, at the moment, the sum of the top force of the main spring 6 and the air pressure in the pressure changing cavity 8 is enough to resist the pressure in the isobaric cavity 9, the elastic template 3 drives the control rod assembly 13 to move upwards, and then the water draining valve port 15 is closed to stop water draining.
The drain valve provides water information through the small floating ball 14, and the drain valve port 15 is pushed to be opened and closed by taking compressed air as power, so that an auxiliary security link is added for a high-speed railway braking system, and the braking system can be ensured to work normally particularly when the wind source purifying device fails, so as to make up the defects in the prior art.
As mentioned above, similar technical solutions can be derived from the solution content presented in connection with the figures. However, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. An automatic drain valve of reservoir, its characterized in that: the hydraulic valve comprises a valve body, an elastic template, an isolating body, an operating rod assembly, a floating ball and a safety assembly, wherein the elastic template and the isolating body are arranged in the valve body up and down and divide the valve body into three cavities, an equal pressure cavity is arranged above the elastic template, a pressure changing cavity is arranged between the elastic template and the isolating body, a water collecting cavity is arranged below the isolating body and is communicated with the bottom of a fan casing through a communicating pipe, the equal pressure cavity is communicated with the fan casing through an air suction pipe and is used for introducing high-pressure air of the fan casing, a water draining valve port is arranged at the bottom of the valve body, a main spring is arranged between the elastic template and the isolating body, the safety assembly is respectively communicated with the equal pressure cavity and the pressure changing cavity through an upper vent hole and a lower vent hole and is used for selectively communicating or disconnecting the pressure changing cavity with the outside atmosphere through the introduced high-pressure air of the fan casing, the operating rod assembly penetrates through the isolating body and moves in the water collecting cavity and the pressure changing cavity, the top of the operating rod assembly is fixedly connected with the elastic template, the bottom of the operating rod assembly is connected with the water draining valve port through a valve plug, the water level sensing collecting cavity and the water collecting cavity is communicated with the fan casing through a water draining valve port, the pressure sensing valve port or the pressure changing cavity is communicated with the pressure changing cavity or the pressure changing valve opening or the pressure changing valve to drive the main spring to open or the main spring to close the pressure valve opening and the pressure changing valve opening;
the valve body comprises an upper valve body and a lower valve body, a circle of mounting table protrudes towards the center on the inner wall of the lower valve body, the mounting table is used for limiting the mounting position of the isolator, and the bottom of the isolator is clamped and fixed on the mounting table.
2. An automatic air cylinder drain valve according to claim 1, wherein: the elastic template is arranged between the upper valve body and the lower valve body, and the upper valve body, the lower valve body and the elastic template are fixedly connected together through screws.
3. An automatic air cylinder drain valve according to claim 1, wherein: the control rod assembly comprises a pull rod, a connecting bowl and a connecting plate which are sequentially connected from top to bottom, the floating ball is arranged inside the connecting bowl, the top end of the pull rod is fixedly connected with the elastic template, the main spring is sleeved on the outer side of the pull rod, a through hole for communicating the water collecting cavity with the pressure changing cavity is formed in the pull rod, an air inlet flow limiting plug is arranged at the through hole, and the floating ball rises or falls along with the water level to open or close the air inlet flow limiting plug so as to realize the on-off between the water collecting cavity and the pressure changing cavity.
4. A reservoir automatic drain valve as defined in claim 3, wherein: the connecting plate is provided with a water permeable hole, and water in the water collecting cavity enters the connecting bowl through the water permeable hole.
5. A reservoir automatic drain valve as defined in claim 3, wherein: the connecting bowl is provided with a connecting bowl vent hole.
6. A reservoir automatic drain valve as defined in claim 3, wherein: an upper layer of template clamping plate and a lower layer of template clamping plate are arranged between the top of the pull rod and the elastic template, the top of the pull rod is provided with external threads, and the top of the pull rod passes through the lower layer of template clamping plate, the elastic template and the upper layer of template clamping plate from bottom to top and then is fixedly connected through nuts.
7. An automatic air cylinder drain valve according to claim 1, wherein: the isolating body is of a hollow annular structure, the isolating body is connected with the inner wall of the valve body in a sealing way, a downward concave cavity is formed in the center of the isolating body, and the main spring is arranged in the concave cavity.
8. An automatic air cylinder drain valve according to claim 1, wherein: the safety assembly comprises a shell, a safety spring, a pressure maintaining piston, an isolating plug and an exhaust flow limiting plug are arranged in the shell from top to bottom, a space between the pressure maintaining piston and the isolating plug is communicated with the isobaric cavity through an upper vent hole, a space below the isolating plug is communicated with the pressure changing cavity through a lower vent hole, and the pressure maintaining piston moves up and down to open and close the exhaust flow limiting plug to realize on-off between the pressure changing cavity and the external atmosphere.
9. The automatic air cylinder drain valve as defined in claim 8, wherein: an adjusting bolt is sleeved on the outer side of the security spring, and the adjusting bolt is connected with the shell through threads.
10. The automatic air cylinder drain valve as defined in claim 9, wherein: a threaded hole for adjusting the initial pressure of the security spring is arranged above the adjusting bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810126189.7A CN108278407B (en) | 2018-02-08 | 2018-02-08 | Automatic drain valve of reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810126189.7A CN108278407B (en) | 2018-02-08 | 2018-02-08 | Automatic drain valve of reservoir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108278407A CN108278407A (en) | 2018-07-13 |
| CN108278407B true CN108278407B (en) | 2023-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810126189.7A Active CN108278407B (en) | 2018-02-08 | 2018-02-08 | Automatic drain valve of reservoir |
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| Country | Link |
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| CN (1) | CN108278407B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114688380B (en) * | 2022-04-27 | 2023-12-22 | 开维喜阀门集团有限公司 | Leakage-proof splash-proof high-pressure sewage exhaust valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002156095A (en) * | 2000-11-21 | 2002-05-31 | Taiyo Ltd | Drain discharge device |
| CN100520136C (en) * | 2007-06-26 | 2009-07-29 | 河海大学 | Batch pressure-differential controlling valve |
| CN206072417U (en) * | 2016-10-14 | 2017-04-05 | 厦门鑫风机电设备有限公司 | Automatic water trap |
| CN208041282U (en) * | 2018-02-08 | 2018-11-02 | 青岛四方庞巴迪铁路运输设备有限公司 | A kind of cylinder automatic drain valve |
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2018
- 2018-02-08 CN CN201810126189.7A patent/CN108278407B/en active Active
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| CN108278407A (en) | 2018-07-13 |
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