CN111043360A

CN111043360A - Drainage device for preventing wading from flowing backwards

Info

Publication number: CN111043360A
Application number: CN201811198264.7A
Authority: CN
Inventors: 葛亚非; 纪秉男; 李向阳; 牛红恩
Original assignee: Zhengzhou Yutong Bus Co Ltd
Current assignee: Zhengzhou Yutong Bus Co Ltd
Priority date: 2018-10-15
Filing date: 2018-10-15
Publication date: 2020-04-21

Abstract

The invention relates to a drainage device for preventing wading from flowing backwards, which comprises an installation sleeve, wherein a step hole is formed in the installation sleeve, and a floating ball and a water-permeable plug core are installed in the step hole; the stepped hole in the mounting sleeve is sequentially divided into a water drainage hole section, a conical section, a buoyancy valve section and a water permeable plugging core mounting section from top to bottom, wherein the conical section is matched with the floating ball to plug the water drainage hole; the water permeable plugging core is provided with a water permeable hole, the upper end face of the water permeable plugging core is provided with a first groove used for avoiding the floating ball to plug the water permeable hole, and the water permeable hole is communicated with the first groove. The invention has few installation accessories and very convenient installation.

Description

Drainage device for preventing wading from flowing backwards

Technical Field

The invention relates to a drainage device for preventing wading from flowing backwards.

Background

For an engine and a motor of a common vehicle or for a motor of a new energy vehicle, when the vehicle wades, external sewage enters the engine or the motor through a water drainage hole of the engine or the motor.

In order to solve the problem, chinese patent document No. CN201953526U discloses a structure, which comprises a valve housing 1, a bottom cover 4, a float 3, a guide sealing ring 2 and an umbrella rod 8, wherein the guide sealing ring 2 is arranged above the umbrella rod 8 and is in the shape of a spherical crown; an umbrella rod 8 is arranged in a water permeable hole on the bottom cover 4, and the floater 3 is sleeved on the umbrella rod 8. The periphery of the bottom cover 4 is provided with water inlet holes 7. When wading, water enters from the water inlet 7 to float the floater 3, and drives the umbrella rod 8 and the guide sealing ring 2 to block the water outlet 6 at the upper part of the valve shell. When the water is not waded, the water in the drain hole 6 flows away through the water inlet hole 7.

The disadvantages of the above scheme are:

firstly, the related accessories are more, the structure is complex, and the assembly is not facilitated;

secondly, on the one hand, the inlet opening 7 is opened around the bottom 4, and on the other hand, the float 3 needs to drive the umbrella pole 8 and the guide sealing ring 2 which are heavier, so when sewage at the lower part enters, the movement of the float 3 is lagged, and partial sewage enters the drain hole before the guide sealing ring blocks the drain hole, so that the pollution to the drain hole is caused, and the blocking effect is influenced.

Disclosure of Invention

The invention aims to provide a wading backflow preventing drainage device which is used for solving the problem that the structure in the prior art is complex and inconvenient to assemble.

In order to achieve the purpose, the invention provides a drainage device for preventing wading from flowing backwards, which comprises an installation sleeve, wherein a step hole is formed in the installation sleeve, and a floating ball and a water-permeable plugging core are installed in the step hole; the stepped hole in the mounting sleeve is sequentially divided into a water drainage hole section, a conical section, a buoyancy valve section and a water permeable plugging core mounting section from top to bottom, wherein the conical section is matched with the floating ball to plug the water drainage hole; the water permeable plugging core is provided with a water permeable hole, the upper end face of the water permeable plugging core is provided with a first groove used for avoiding the floating ball to plug the water permeable hole, and the water permeable hole is communicated with the first groove.

The invention has few installation accessories and very convenient installation.

In order to solve the second disadvantage indicated by the background art, the lower section of the water permeable holes has a larger diameter than the upper section of the water permeable holes. Because the aperture of the lower hole section is larger than that of the upper hole section, the water flow can be accelerated after entering the water permeable hole section, so that a certain impact force is formed on the floating ball, and the floating ball can quickly enter the conical section to block the water outlet.

And in a similar way, a second groove is arranged on the lower end face of the water permeable plug core, and the second groove is communicated with the water permeable hole. The sectional area of second recess is greater than the hole of permeating water, therefore, and rivers can accelerate after getting into the hole of permeating water to form certain impact force to the floater, make the faster toper section shutoff outlet that gets into of floater.

In order to facilitate the installation of the drainage device on the motor or the engine shell, the installation sleeve is a threaded sleeve provided with external threads.

In order to facilitate the assembly of the water-permeable plugging core, the water-permeable plugging core and the water-permeable plugging core mounting section are fixedly and hermetically mounted through threads.

Drawings

FIG. 1 is a prior art reverse flow prevention drain check valve;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a view of the structure of a water permeable plugging core;

FIG. 5 is a view showing the structure of the installation of the drain device and the motor;

in the figure: 1 is a valve shell, 2 is a guide sealing ring, 3 is a floater, 4 is a bottom cover, 6 is a drain hole, 7 is a water inlet hole, and 8 is an umbrella rod;

20 is a drainage device, 10 is a threaded sleeve, 11 is a floating ball, 12 is a water-permeable blocking core, 101 is a water drainage hole, 102 is a conical section, 103 is a buoyancy valve section, 105 is an external thread, 121 is a water-permeable hole, 122 is a first groove, 123 is a second groove, 30 is a motor shell, 31 is the inside of the motor shell, and 32 is the outside of the motor shell.

Detailed Description

As shown in fig. 2 and 3, the wading backflow preventing drainage device 20 includes a threaded sleeve 10 having an external thread 105, the threaded sleeve 10 having an internal stepped hole, the upper and lower positions of which are defined according to the orientation shown in the figure, the stepped hole being sequentially provided with a drain hole section, an upward converging tapered section 102, a buoyancy valve section 103 and a water permeable plug installation section from the upper end to the lower end.

The aperture of the water drainage hole section is the smallest, the aperture of the buoyancy valve section is the second, and the aperture of the water permeable plug core installation section is the largest. The water outlet section corresponds to a water outlet on the upper end surface of the screw sleeve to form a water outlet 101. A floating ball 11 is arranged in a cavity of the buoyancy valve section 103, and when the floating ball 11 floats, the floating ball enters the conical section 102 matched with the floating ball, so that the water outlet 101 is blocked. The water permeable plugging core mounting section is used for mounting a water permeable plugging core 12, and the water permeable plugging core 12 is fixedly and hermetically assembled with the water permeable plugging core mounting section through threads.

The water-permeable plugging core 12 has a structure shown in fig. 4, and the upper end surface is connected with the buoyancy valve section 103. The water permeable blocking core 12 comprises a water permeable hole 121, a first groove 122 is arranged on the upper end face of the water permeable blocking core, and the first groove 122 is communicated with the upper part of the water permeable hole 121. The lower terminal surface of the stifled core that permeates water is equipped with second recess 123, and second recess 123 and the hole 121 lower part UNICOM that permeates water. The first groove 122 and the second groove 123 are disposed perpendicular to each other (as other embodiments, they may be parallel to each other or at other angles). The permeable holes 121 are located in the center of the permeable block core or any other position, as long as the upper and lower end surfaces are communicated.

When assembling the drainage device 20, firstly, the floating ball 11 is put into the buoyancy valve section 103, and then the water-permeable plugging core 12 is screwed in.

Compared with the reference documents in the background art, the structure of the embodiment only needs to sequentially load the floating ball 11 and the water-permeable plugging core 12 into the threaded sleeve 10, and the structure is simple and convenient to assemble.

The water-permeable plugging core 12 and the water-permeable plugging core installation section are fixedly sealed by screwing, and as other embodiments, other types of fixing and sealing modes, such as bonding, can be adopted.

The water discharge device of the embodiment may be used for a vehicle engine and a motor of a general vehicle, or a motor of a new energy vehicle (the motor of the new energy vehicle is mounted on the bottom of the vehicle). Next, a motor of the new energy vehicle will be described as an example.

As shown in fig. 5, the upper end of the drain device 20 corresponds to the motor housing interior 31, and the lower end of the drain device 20 corresponds to the motor housing exterior 32; the assembled drainage device 20 of the above embodiment is inserted into the drainage threaded hole of the motor housing 30, and the installation of the drainage device on the motor is completed.

The working principle is as follows:

when the vehicle wades, water can get into buoyancy valve section 103 through the hole of permeating water 121 of the stifled core that permeates water, and floater 11 receives the buoyancy effect of water and rises along with the surface of water is synchronous, until totally shutoff outlet 101 to realize that the vehicle wades the function that is self-closing.

When the vehicle travels in the waterless area, if there is ponding inside the motor, because the water action of its own gravity, the hole 121 that permeates water through outlet 101, buoyancy valve section 103 and the stifled core that permeates water flows to the motor casing outside. At this moment, the first groove 122 of the upper end surface of the water-permeable plugging core is used for preventing the floating ball from plugging the water-permeable hole in the drainage process.

In addition, when the vehicle wades, water enters the water permeable hole 121 from the second groove 123 of the water permeable blocking core, and the sectional area of the second groove is larger than that of the water permeable hole, so that the water flow is accelerated after entering the water permeable hole 121, a certain impact force is formed on the floating ball 11, and the floating ball 11 enters the conical section 102 to block the water drainage hole 101 quickly. Compared with the prior art, the scheme that the water inlet holes are formed in the periphery of the bottom cover can avoid the situation that partial sewage enters the equipment. In order to realize the effect of accelerating the water flow speed, the second groove can be modified into a large-diameter section as a lower hole section of the water permeable hole, and the hole diameter of the large-diameter section is larger than that of an upper hole section of the water permeable hole; the second groove can also be modified into an upward-converging conical hole section.

In order to achieve the above-mentioned purpose of impacting the floating ball, it is preferable that the water permeable hole is provided at the center or near the center of the water permeable block core. This is because the permeable hole needs to be under the floating ball under the non-wading condition, and the volume of the floating ball 11 is substantially equivalent to that of the buoyancy valve section 103, so the permeable hole is preferably located in the middle or near the middle.

The drainage device 20 is matched with the drainage threaded hole by selecting a threaded sleeve structure to complete fixed sealing. As another embodiment, the drainage device 20 may be fixed and sealed without using a threaded sleeve structure, for example, by gluing it to the drainage hole with a sealing glue, or by using a fixing and sealing method commonly used in the art.

Claims

1. A drainage device for preventing wading from flowing backwards is characterized by comprising an installation sleeve, wherein a step hole is formed in the installation sleeve, and a floating ball and a water-permeable plug core are installed in the step hole; the stepped hole in the mounting sleeve is sequentially divided into a water drainage hole section, a conical section, a buoyancy valve section and a water permeable plugging core mounting section from top to bottom, wherein the conical section is matched with the floating ball to plug the water drainage hole; the water permeable plugging core is provided with a water permeable hole, the upper end face of the water permeable plugging core is provided with a first groove used for avoiding the floating ball to plug the water permeable hole, and the water permeable hole is communicated with the first groove.

2. The device of claim 1, wherein the lower section of the water-permeable holes has a larger diameter than the upper section of the water-permeable holes.

3. The device of claim 1, wherein a second groove is provided on the lower end surface of the water-permeable block core, and the second groove communicates with the water-permeable holes.

4. The device of claim 1, 2 or 3, wherein the mounting sleeve is a threaded sleeve with external threads.

5. The device of claim 1, 2 or 3, wherein the water-permeable block core and the water-permeable block core mounting section are fixedly and hermetically mounted by means of threads.