Automatic water drainage structure of air cylinder

Abstract

The invention discloses an automatic drainage structure of an air cylinder, which relates to the technical field of drainage structures, and comprises a venturi connector and a drainage valve, the venturi connector is a three-way joint, extension pipes at the large end and the small end of a taper hole of the venturi connector are respectively communicated with an exhaust pipe of the air cylinder in parallel, and a vertical opening is communicated with one end of the drainage valve through a pipeline. The drainage valve is communicated with the bottom of the air cylinder, a valve element and a drainage hole are arranged in the drainage valve in a sliding mode, air pressure changes in the venturi connector can enable the valve element to slide, and sliding of the valve element can enable the drainage hole to be opened and closed. The working principle of a venturi connector and a venturi tube is utilized, a power source generated by gas flow is adopted to drive the water drain valve to start the water drain function, automatic water drain of the air cylinder is achieved while pneumatic brake operation is conducted, and the problems that manual water drain is needed and operation is difficult at the present stage are solved.

Description

Technical Field

[0001] The invention relates to the technical field of water discharge structures, in particular to an automatic water discharge structure for an air storage cylinder. Background Art

[0002] At present, the air brake systems on commercial vehicles all use compressed air for braking. In order to increase the efficiency and effect of braking, 1-4 air cylinders are generally equipped to store compressed air to provide energy for braking. However, compressed air also has its disadvantages, especially in the south or hot and humid areas. In the hot and humid summer, the air contains a lot of water. After compression, it will condense in the transmission system. The condensed water vapor will generally be retained in the air cylinder. Under the influence of gravity, the water will generally remain at the bottom of the air cylinder. If the accumulated condensed water cannot be discharged for a long time, the condensed water will enter the brake valve and control valve through the pipeline, causing the risk of brake failure.

[0003] At present, the drain valves on the market are mainly manual drain valves, which need to be manually drained regularly. The air cylinder is generally installed at the bottom of the chassis. When draining, personnel need to enter under the chassis, which causes great inconvenience and safety hazards. Some automatic drain devices have also appeared on the market, but their structure and working state are unstable, and they are often accompanied by defects such as poor sealing, easy clogging, poor drainage, and large size. Therefore, there is an urgent need for a device that can automatically drain water to ensure that the air pressure in the air cylinder cannot be reduced too much during the draining process. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic water discharge structure for an air cylinder to solve the problems existing in the above-mentioned prior art, so that the condensed water in the air cylinder can be automatically discharged during the braking exhaust process, while the air pressure loss of the air cylinder itself is small.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an automatic water discharge structure for an air cylinder, comprising a Venturi connector and a drain valve, wherein the Venturi connector is a three-way connector, extension pipes at the large end and the small end of the tapered hole of the Venturi connector are respectively connected in parallel with the exhaust pipe of the air cylinder, and the vertical port is connected with one end of the drain valve through a pipeline, the drain valve is connected with the bottom of the air cylinder, a valve core and a drain hole are slidably arranged in the drain valve, the air pressure change in the Venturi connector can cause the valve core to slide, and the sliding of the valve core can cause the drain hole to open and close.

[0007] Preferably, the center line of the vertical opening of the Venturi connector is located within the end surface of the small end of the tapered hole of the Venturi connector and is perpendicular to the center line of the tapered hole, and the three connectors of the Venturi connector are all quick-insert connectors.

[0008] Preferably, the drain valve includes the valve core, a valve housing, an elastic member, a plug and a connector. Two connectors are provided on the valve housing, and the two connectors are respectively used to communicate with the Venturi connector and the air storage cylinder. An air cavity is provided in the valve housing, and the end of the air cavity is sealed and connected with the plug. The valve core is slidably provided in the air cavity, one end of the valve core is connected with the Venturi connector, and the other end is connected with the plug through the elastic member. The drain hole is provided on the side wall of the valve housing, and the sliding of the valve core can open and close the drain hole.

[0009] Preferably, the center lines of the two connectors are vertically arranged, the connector connected to the Venturi connector is a quick-plug connector, and the connector connected to the air storage cylinder is an externally threaded tube, and a sealing ring is arranged on the externally threaded tube.

[0010] Preferably, two drainage holes are provided, one drainage hole is provided in a connector connected to the air storage cylinder, the air cavity is connected to the air storage cylinder through the drainage hole, and the other drainage hole is provided at the bottom of the valve housing.

[0011] Preferably, the diameter of the drainage hole is 1 mm-2 mm and the axial distance between the two drainage holes is 2 mm-6 mm.

[0012] Preferably, three sealing rings are provided on the valve core, and the three sealing rings divide the valve core and the air cavity into a drain ring cavity and a closing ring cavity. The two drainage holes are staggered. Under normal conditions, the two drainage holes are respectively located in the drain ring cavity and the closing ring cavity. In the exhaust state, the two drainage holes are both located in the drain ring cavity.

[0013] Preferably, the valve core is matched with the air cavity gap, the axial length of the drain ring cavity is greater than the axial distance between the two drain holes and smaller than the axial length of the air cavity, and the sealing ring is an O-ring made of rubber material.

[0014] Preferably, the elastic member is a spring, one end of which is against the sealed groove and the other end is against the groove at the end of the valve core. Under normal conditions, the elastic force of the elastic member is equal to the pressure generated by the gas in the air cavity. In the exhaust state, the pressure generated by the gas in the air cavity is greater than the elastic force of the elastic member, which can cause the valve core to slide and connect the two drainage holes.

[0015] Preferably, the material of the Venturi connector and the drain valve includes metal or plastic.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The present invention utilizes the working principle of the Venturi tube of the Venturi connector and adopts the power source generated by the gas flow to drive the drain valve to open the drain function, thereby realizing automatic draining of the air cylinder while the pneumatic brake is operating, thus solving the problem of manual draining and the difficulty of operation at the current stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a structural schematic diagram of the automatic water discharge structure of the air storage cylinder in the embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the automatic water discharge structure of the air storage cylinder in an embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the structure of the Venturi connector in an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the structure of a drain valve in an embodiment of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the valve core in an embodiment of the present invention;

[0024] In the figure: 1-Venturi connector, 2-quick plug connector, 3-conical hole, 4-drain valve, 5-valve housing, 6-valve core, 7-spring, 8-drain hole, 9-blocking, 10-sealing ring, 11-air cavity, 12-external threaded pipe, 13-groove, 14-exhaust pipe, 15-air storage cylinder. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide an automatic water discharge structure for an air reservoir to solve the problems existing in the prior art, so that the condensed water in the air reservoir can be automatically discharged during the braking exhaust process, while the air pressure loss of the air reservoir itself is small.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 5 As shown, in this embodiment, an automatic water discharge structure of an air storage cylinder is provided, including a Venturi connector 1 and a drain valve 4. The Venturi connector 1 is a three-way connector. The extension pipes at the large end and the small end of the tapered hole 3 of the Venturi connector 1 are respectively connected in parallel with the exhaust pipe 14 of the air storage cylinder 15, and the vertical port is connected to one end of the drain valve 4 through a pipeline. The drain valve 4 is connected to the bottom of the air storage cylinder 15. A valve core 6 and a drain hole 8 are slidably arranged in the drain valve 4. The air pressure change in the Venturi connector 1 can slide the valve core 6, and the sliding of the valve core 6 can open and close the drain hole 8. Among them, the exhaust pipe 14 is connected to the air brake system.

[0029] As an optional solution, the center line of the vertical port of the Venturi connector 1 in this embodiment is located in the end face of the small end of the tapered hole 3 of the Venturi connector 1 and is perpendicular to the center line of the tapered hole 3. The three connectors of the Venturi connector 1 are all quick-plug connectors 2. In this embodiment, the Venturi connector 1 is a T-shaped structure. The straight-through port is a gas port with a large gas flow rate, while the vertical port plays a role of pressure change and has no requirements for flow rate. An elbow can also be used. In this embodiment, the working principle of the Venturi valve is used to change the air flow from coarse to fine to accelerate the gas flow rate, so that the gas forms a vacuum area on the rear side of the small end of the tapered hole 3 of the Venturi tube, and then the valve core 6 in the drain valve 4 can be adsorbed, and then the drain hole 8 is opened to achieve drainage of the gas storage cylinder 15.

[0030] As an optional solution, the drain valve 4 in this embodiment includes a valve core 6, a valve housing 5, an elastic member, a plug 9 and a connector. Two connectors are provided on the valve housing 5, and the two connectors are used to communicate with the Venturi connector 1 and the air storage cylinder 15 respectively. An air cavity 11 is provided in the valve housing 5, and the end of the air cavity 11 is sealed and connected with the plug 9. The valve core 6 is slidably provided in the air cavity 11, and one end of the valve core 6 is connected with the Venturi connector 1, and the other end is connected with the plug 9 through the elastic member. A drain hole 8 is provided on the side wall of the valve housing 5, and the sliding of the valve core 6 can open and close the drain hole 8. Since the bottom of the air storage cylinder 15 is easy to store water, the non-misplaced drain hole 8 can also be directly drained.

[0031] As an optional solution, the center lines of the two connectors in this embodiment are arranged vertically. The connector connected to the Venturi connector 1 is a quick-connect connector 2, which is sealed to the valve housing 5 through threads and a sealing ring 10. The connector connected to the air reservoir 15 is an externally threaded tube 12, on which a sealing ring 10 is provided to achieve sealing of the connection and avoid air pressure leakage.

[0032] As an optional solution, two drain holes 8 are provided in the present embodiment. One drain hole 8 is provided in the connector connected to the air cylinder 15 to prevent the drain port from being too large to leak the air pressure of the air cylinder 15. The air cavity 11 is connected to the air cylinder 15 through the drain hole, and the other drain hole 8 is provided at the bottom of the valve housing 5 to facilitate drainage by gravity.

[0033] As an optional solution, in this embodiment, the diameter of the drainage hole 8 is 1 mm-2 mm, preferably 1.5 mm, and the axial distance between the two drainage holes 8 is 2 mm-6 mm, preferably 5 mm.

[0034] As an optional solution, in the present embodiment, three sealing rings 10 are arranged on the valve core 6, and the three sealing rings 10 divide the valve core 6 and the air cavity 11 into a drain ring cavity and a closing ring cavity. The two drainage holes 8 are staggered. Under normal conditions, the two drainage holes 8 are respectively located in the drain ring cavity and the closing ring cavity. The two drainage holes 8 are separated by the middle sealing ring 10 and cannot be connected to each other, thereby realizing the water storage function of the drain ring cavity. In the exhaust state, the two drainage holes 8 are both located in the drain ring cavity, and the two drainage holes 8 are connected to each other, thereby realizing the drainage function.

[0035] As an optional solution, in this embodiment, the valve core 6 and the air cavity 11 are matched with each other in a clearance to accommodate the discharged condensed water. The axial length of the drain ring cavity is greater than the axial spacing between the two drain holes 8 and less than the axial length of the air cavity 11. The sealing ring 10 is an O-ring made of rubber. In this embodiment, the diameter of the valve core 6 is 10 mm, the axial length of the drain ring cavity is 7 mm, and the axial length of the closing ring cavity is 3 mm; the dimensions of the valve core 6 and the drain hole 8 can be changed as needed and are not limited to the dimension settings mentioned in this application.

[0036] As an optional solution, the elastic member in this embodiment is a spring 7, one end of the spring 7 is against the groove 13 of the plug 9, and the other end is against the groove 13 at the end of the valve core 6, which is convenient for the installation and fixation of the spring 7. Under normal conditions, the elastic force of the elastic member is equal to the pressure generated by the gas in the air cavity 11. In the exhaust state, the pressure generated by the gas in the air cavity 11 is greater than the elastic force of the elastic member, which can make the valve core 6 slide and connect the two drainage holes 8. The valve core 6 is at different positions and the matching holes are in different intervals, thereby realizing water storage and water discharge.

[0037] As an optional solution, the material of the Venturi connector 1 and the drain valve 4 in this embodiment includes metal or plastic, or any other material that is easy to shape or process.

[0038] In addition to being used in air brake systems, the automatic water discharge structure of the air storage cylinder of this embodiment can also be used for the water discharge function in factories that produce compressed air. It mainly utilizes the working principle of the Venturi valve and uses the airflow generated when using gas as a power source. While the airflow changes from coarse to fine to accelerate the gas flow rate, the gas forms a vacuum area on the rear side of the small end of the tapered hole 3 of the Venturi tube, and then the valve core 6 in the drain valve 4 can be adsorbed to the left, thereby opening the drain hole 8 to realize the drainage function of the air storage cylinder 15. No manual operation is required during this process, and water is discharged while exhausting the gas, without any extra power source.

[0039] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An automatic water discharge structure for an air storage cylinder, characterized in that: It includes a Venturi connector and a drain valve, the Venturi connector is a three-way connector, the extension pipes at the large end and the small end of the tapered hole of the Venturi connector are respectively connected in parallel with the exhaust pipe of the air storage cylinder, and the vertical port is connected with one end of the drain valve through a pipeline, the drain valve is connected to the bottom of the air storage cylinder, a valve core and a drain hole are slidably arranged in the drain valve, the air pressure change in the Venturi connector can make the valve core slide, and the sliding of the valve core can open and close the drain hole.

2. The automatic water discharge structure of the air cylinder according to claim 1 is characterized in that: The center line of the vertical opening of the Venturi connector is located inside the end surface of the small end of the tapered hole of the Venturi connector and is perpendicular to the center line of the tapered hole. The three connectors of the Venturi connector are all quick-insert connectors.

3. The automatic water discharge structure of the air cylinder according to claim 1 is characterized in that: The drain valve includes the valve core, a valve housing, an elastic member, a plug and a connector. Two connectors are provided on the valve housing, and the two connectors are respectively used to communicate with the Venturi connector and the air storage cylinder. An air cavity is provided in the valve housing, and the end of the air cavity is sealed and connected with the plug. The valve core is slidably provided in the air cavity, one end of the valve core is connected with the Venturi connector, and the other end is connected with the plug through the elastic member. The drain hole is provided on the side wall of the valve housing, and the sliding of the valve core can open and close the drain hole.

4. The automatic water discharge structure of the air cylinder according to claim 3 is characterized in that: The center lines of the two connectors are vertically arranged, the connector connected with the Venturi connector is a quick-insert connector, and the connector connected with the air storage cylinder is an externally threaded tube, on which a sealing ring is arranged.

5. The automatic water discharge structure of the air cylinder according to claim 3 is characterized in that: There are two drainage holes, one of which is arranged in a connector connected to the air storage cylinder, the air cavity is connected to the air storage cylinder through the drainage hole, and the other drainage hole is arranged at the bottom of the valve housing.

6. The automatic water discharge structure of the air cylinder according to claim 5, characterized in that: The diameter of the drainage hole is 1mm-2mm and the axial distance between the two drainage holes is 2mm-6mm.

7. The automatic water discharge structure of the air cylinder according to claim 5, characterized in that: Three sealing rings are arranged on the valve core, and the three sealing rings divide the valve core and the air cavity into a drain ring cavity and a closing ring cavity. The two drainage holes are staggered. Under normal conditions, the two drainage holes are respectively located in the drain ring cavity and the closing ring cavity. Under the exhaust state, the two drainage holes are both located in the drain ring cavity.

8. The automatic water discharge structure of the air cylinder according to claim 7, characterized in that: The valve core is matched with the air cavity gap, the axial length of the drain ring cavity is greater than the axial distance between the two drainage holes and smaller than the axial length of the air cavity, and the sealing ring is an O-ring made of rubber material.

9. The automatic water discharge structure of the air cylinder according to claim 3, characterized in that: The elastic member is a spring, one end of which is against the sealed groove and the other end is against the groove at the end of the valve core. Under normal conditions, the elastic force of the elastic member is equal to the pressure generated by the gas in the air cavity. In the exhaust state, the pressure generated by the gas in the air cavity is greater than the elastic force of the elastic member, which can cause the valve core to slide and connect the two drainage holes.

10. The automatic water discharge structure of the air cylinder according to claim 1, characterized in that: The material of the Venturi connector and the drain valve includes metal or plastic.

Images