Drainage device and drainage system

Abstract

The embodiment of the present application provides a drainage device and a drainage system. The drainage device comprises a first water inlet end, a second water inlet end, an expansion vessel and a water outlet end. The first water inlet end is configured as a vertical water inlet. The second water inlet end is configured as a horizontal water inlet. The expansion vessel comprises a main body part and a flow guide part. The main body part is tubular. The top of the main body part is connected with the first water inlet end. The side wall of the main body part is communicated with the flow guide part to form a fluid passage. The flow guide part is connected with the second water inlet end. The flow guide part comprises a guide plate, a guide groove and an inclined flow guide section. The guide plate is located on the side close to the second water inlet end. The guide groove is connected with the guide plate in a circular arc transition mode. The inclined flow guide section is connected with the guide groove in a circular arc transition mode. The inclined flow guide section is configured to guide water flow along the inner wall of the main body part. The water inlet of the second water inlet end flows along the inner wall of the main body part after passing through the guide plate, the guide groove and the inclined flow guide section in sequence. The water outlet end is located at the bottom of the main body part.

Description

Technical Field

[0001] This application relates to the field of pipeline technology, and in particular to a drainage device and drainage system. Background Technology

[0002] This section provides only background information relevant to this application and is not necessarily prior art.

[0003] Drainage pipes are widely used in various buildings. In related technologies, the main drainage system consists of multiple drainage pipes, with drainage risers used for gravity drainage. During drainage, water from the horizontal drainage pipes flows into the drainage risers to discharge sewage. At the confluence, the water flows from each pipe collide, affecting the flow velocity and reducing the drainage capacity. Furthermore, the collisions generate significant vibration and noise, severely impacting the lifespan of the drainage pipes. When used in residential buildings, the noise generated can seriously disrupt residents' lives. Therefore, designing a low-vibration, low-noise drainage system is a crucial issue that needs to be addressed. Summary of the Invention

[0004] The purpose of this application is to provide a drainage device and drainage system to solve the problems of excessive vibration and noise in existing drainage pipes. To achieve the above objective, this application provides the following technical solution:

[0005] An embodiment of the first aspect of this application provides a drainage device for use in a drainage pipe. The drainage device includes a first inlet end, a second inlet end, an expansion container, and an outlet end. The first inlet end is configured as a vertical inlet. The second inlet end is configured as a horizontal inlet. The expansion container includes a main body and a guide section. The main body is tubular, with its top connected to the first inlet end. The sidewall of the main body communicates with the guide section to form a fluid channel. The guide section is connected to the second inlet end and includes a guide plate, a guide groove, and an inclined guide section. The guide plate is located near the second inlet end. The guide groove is connected to the guide plate with an arc transition, and the inclined guide section is connected to the guide groove with an arc transition. The inclined guide section is configured to guide water flow along the inner wall of the main body. Water entering from the second inlet end flows along the inner wall of the main body after passing through the guide plate, the guide groove, and the inclined guide section in sequence. The outlet end is located at the bottom of the main body.

[0006] According to the drainage device in this application embodiment, the water to be discharged can enter from either the first inlet or the second inlet and then flow out from the outlet. The drainage device also includes an expansion section, with a guide section connected to the side wall of the main body of the expansion section. One end of the guide section is connected to the second inlet, and the other end is connected to the main body. Thus, water entering from both inlets can flow into the main body under the guidance of the guide section. Specifically, the water to be discharged can enter from the second inlet and flow to the main body via the guide section. The water flows sequentially through the guide plate, guide groove, and inclined guide section in the guide section. Since the guide groove is connected to the guide plate and the inclined guide section with an arc transition, the water flows along the inner wall of the drainage device during its flow. When water entering from the second inlet flows into the main body, the inclined guide section guides the water to flow along the inner wall of the main body, thereby preventing collisions between the water entering from the first and second inlets during their convergence. This reduces vibration and noise caused by the collisions and extends the service life of the drainage pipe.

[0007] In addition, the embodiments of this application may also have the following additional technical features:

[0008] In some embodiments of this application, the side of the guide groove away from the guide plate is connected to the main body and forms a blocking portion.

[0009] In some embodiments of this application, the second water inlet is tubular in shape, the guide plate has an angle of 40° to 50° with the axis of the second water inlet, and the inclined guide section has an angle of 35° to 45° with the axis of the main body.

[0010] In some embodiments of this application, the inclined guide section protrudes from the main body, and the maximum dimension of the plane containing the axis from the inner wall of the inclined guide section to the second water inlet is 10 mm to 15 mm greater than the radius of the main body.

[0011] In some embodiments of this application, the drainage device further includes a first guide ring located inside the main body and connected to the first water inlet end. The inner diameter of the first guide ring near the first water inlet end is larger than the inner diameter of the first guide ring away from the first water inlet end.

[0012] In some embodiments of this application, the area of ​​the cross-section enclosed by the inner wall of the main body is 1.5 to 2.15 times the area of ​​the cross-section enclosed by the inner wall of the first guide ring, and the dimension of the main body along the axial direction is 150 mm to 170 mm.

[0013] In some embodiments of this application, the drainage device further includes a tapered pipe, one end of which is connected to the bottom of the main body and the other end of which is connected to the outlet end, and the inner diameter of the tapered pipe near the main body is larger than the inner diameter of the tapered pipe near the outlet end.

[0014] In some embodiments of this application, the drainage device further includes a second guide ring, one end of which is connected to the tapered pipe and the other end of which is connected to the outlet end. The inner diameter of the second guide ring near the tapered pipe is larger than the inner diameter of the second guide ring near the outlet end.

[0015] In some embodiments of this application, the included angle of the tapered tube is 18° to 20°.

[0016] An embodiment of the second aspect of this application provides a drainage system including the drainage device in any embodiment of the first aspect.

[0017] The drainage system according to the embodiments of this application, having the drainage device of any embodiment of the first aspect, also possesses the beneficial effects of any embodiment of the first aspect.

[0018] In some embodiments of this application, the drainage system further includes an inlet pipe and an outlet pipe. The inlet pipe is connected to the first inlet end or the second inlet end, and the outlet pipe is connected to the outlet end. The drainage system also includes a first guide ring and a second guide ring. The first guide ring is located inside the main body and is connected to the first inlet end. The inner diameter of the first guide ring near the inlet end is larger than the inner diameter of the inlet pipe. One end of the second guide ring is connected to the main body, and the other end of the second guide ring is connected to the outlet end. The inner diameter of the second guide ring near the outlet end is smaller than or equal to the inner diameter of the outlet pipe. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Throughout the drawings, the same reference numerals denote the same parts. In the drawings:

[0020] Figure 1 This is a schematic diagram (front view) of the drainage device in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram (rear view) of the drainage device in an embodiment of this application;

[0022] Figure 3This is a schematic diagram (top view) of the drainage device in an embodiment of this application;

[0023] Figure 4 for Figure 3 Sectional view along the BB direction;

[0024] Figure 5 This is a schematic diagram (left view) of the drainage device in an embodiment of this application;

[0025] Figure 6 for Figure 5 A sectional view along the EE direction;

[0026] Figure 7 for Figure 3 A cross-sectional view along the GG direction;

[0027] Figure 8 This is a cross-sectional view of the guide plate of the drainage device in an embodiment of this application;

[0028] Figure 9 This is a cross-sectional view of the guide plate of the drainage device in an embodiment of this application from another perspective;

[0029] Figure 10 This is a schematic diagram of the water flow direction in the drainage device in the embodiments of this application;

[0030] Figure 11 This is a schematic diagram of the drainage system in an embodiment of this application.

[0031] The markings in the attached diagram are as follows:

[0032] 10 - First drain pipe; 20 - Second drain pipe; 30 - Outlet pipe; 40 - Water trap; 41 - Water level line;

[0033] 110 - First water inlet; 120 - Second water inlet; 130 - Water outlet;

[0034] 200 - Expander; 210 - Main body; 220 - Flow guide; 221 - Guide plate; 222 - Guide groove; 2221 - Blocking part; 223 - Inclined flow guide section;

[0035] 300-tapered tube;

[0036] 410 - First guide ring; 420 - Second guide ring;

[0037] 510 - Water flow direction at the second inlet; 520 - Water flow direction at the first inlet. Detailed Implementation

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0039] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "upper," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure.

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.

[0041] like Figures 1 to 9 As shown, an embodiment of the first aspect of this application provides a drainage device for use in a drainage pipe. The drainage device includes a first inlet 110, a second inlet 120, an expansion container 200, and an outlet 130. The first inlet 110 is configured as a vertical inlet. The second inlet 120 is configured as a horizontal inlet. The expansion container 200 includes a main body 210 and a flow guide 220. The main body 210 is tubular, and its top is connected to the first water inlet 110. The side wall of the main body 210 communicates with the flow guide 220 to form a fluid channel. The flow guide 220 is connected to the second water inlet 120. The flow guide 220 includes a guide plate 221, a guide groove 222, and an inclined flow guide section 223. The guide plate 221 is located on the side close to the second water inlet 120. The guide groove 222 is connected to the guide plate 221 in an arc transition manner. The inclined flow guide section 223 is connected to the guide groove 222 in an arc transition manner. The inclined flow guide section 223 is configured to guide the water flow along the inner wall of the main body 210. The water inlet of the second water inlet 120 flows along the inner wall of the main body 210 after passing through the guide plate 221, the guide groove 222, and the inclined flow guide section 223 in sequence. The water outlet 130 is located at the bottom of the main body 210.

[0042] According to the drainage device in this embodiment, the water to be discharged can enter from either the first inlet end 110 or the second inlet end 120, and then flow out from the outlet end 130. The drainage device also includes an expansion section, on which a guide section 220 is connected to the side wall of the main body 210 of the expansion section. One end of the guide section 220 is connected to the second inlet end 120, and the other end is connected to the main body 210. Thus, water entering from both inlets can flow into the main body 210 under the guidance of the guide section 220. Specifically, the water to be discharged can enter from the second inlet end 120 and flow to the main body 210 via the guide section 220. The water flows sequentially through the guide plate 221, the guide groove 222, and the inclined guide section 223 within the guide section 220. Since the guide groove 222 is connected to the guide plate 221 and the inclined guide section 223 in a rounded transition manner, the water will flow along the inner wall of the drainage device during the flow process. When the water entering from the second water inlet 120 flows into the main body 210, the inclined guide section 223 can guide the water to flow along the inner wall of the main body 210. This can prevent the water entering from the first water inlet 110 and the water entering from the second water inlet 120 from colliding when they converge. This can reduce the vibration and noise caused by the collision and extend the service life of the drainage pipe.

[0043] like Figure 4 As shown, in some embodiments of this application, the side of the guide groove 222 away from the guide plate 221 is connected to the main body 210 and forms a blocking part 2221. In this embodiment, water flowing in from the second water inlet 120 is first guided by the guide plate 221 and then flows into the guide groove 222. When the water flows through the guide groove 222, since the blocking part 2221 is provided at the connection between the guide groove 222 and the main body 210, the water flow will be blocked by the blocking part 2221. That is to say, the water will fall first and then rise during the flow, thereby reducing the inertial force of the water flow, reducing the speed of the water flow, and finally guiding the water flow to the inclined guide section 223. Finally, the inclined guide section 223 guides the water flow to adhere to the inner wall of the main body 210.

[0044] In some embodiments of this application, the second water inlet 120 is tubular in shape, the guide plate 221 forms an angle of 40° to 50° with the axis of the second water inlet 120, and the inclined guide section 223 forms an angle of 35° to 45° with the axis of the main body 210. Please refer to... Figure 8 The illustration shows a top view of the drainage device. Figure 8 In the middle, the angle A between the axis of the guide plate 221 and the axis of the second water inlet 120 is 40° to 50°. Please continue to refer to Figure 1 The diagram shows a schematic of the drainage device. Figure 1In this embodiment, the angle B between the inclined guide section 223 and the axis of the main body 210 is 35° to 45°. The water to be drained flows into the guide section 220 from the second inlet end 120 and, guided by the guide plate 221, flows into the guide groove 222. The angle A between the guide plate 221 and the axis of the second inlet end 120 is set to 40° to 50°. This allows the water to better adhere to the inner wall of the guide plate 221 during flow, preventing the water flow from being too fast or too slow, and changing the direction of the water flow so that it flows along a preset spiral line. Please refer to... Figure 10 The diagram shows the flow direction of water flowing into the drainage device from the second inlet 120. When the wastewater to be discharged flows from the guide channel 222 to the inclined guide section 223, the water flows through the inclined guide section 223 at a certain angle. When the angle B between the inclined guide section 223 and the axis of the main body 210 is designed to be 35° to 45°, the water can flow along the inclined angle, thereby causing the water flowing into the main body 210 to move along a spiral trajectory.

[0045] In some embodiments of this application, the inclined guide section 223 protrudes from the main body 210, and the maximum dimension of the plane containing the inner wall of the inclined guide section 223 and the axis of the second water inlet 120 is greater than the radius of the main body 210 by 10 mm to 15 mm. Please refer to... Figure 3 and Figure 5 , Figure 3 This is a top view of the drainage device of this application. In the figure, the maximum dimension of the plane containing the axis from the inner wall of the inclined guide section 223 to the second water inlet 120 is 10mm to 15mm greater than the radius H of the main body 210. This allows water flowing from the guide groove 222 into the inclined guide section 223 to maintain a certain angle of inclination, preventing the water from directly impacting the inner wall of the main body 210. In some specific embodiments, the cross-sectional area of ​​the inclined guide section 223 can be greater than 3925mm². 2 This allows the drainage device to have a greater drainage capacity.

[0046] like Figure 4As shown, in some embodiments of this application, the drainage device further includes a first guide ring 410. The first guide ring 410 is located inside the main body 210 and is connected to the first water inlet 110. The inner diameter D1 of the first guide ring 410 near the first water inlet 110 is larger than the inner diameter D2 of the first guide ring 410 away from the first water inlet 110. In this embodiment, the inner diameter D1 of the first guide ring 410 near the first water inlet 110 is larger than the inner diameter D2 of the first guide ring 410 away from the first water inlet 110. This allows the water flowing in from the first water inlet 110 to converge towards the center, preventing the water entering from the first water inlet 110 from colliding with the water entering from the second water inlet 120 when they converge. This further gives the drainage device the advantages of low vibration and low noise.

[0047] In some embodiments of this application, the area of ​​the cross-section enclosed by the inner wall of the main body 210 is 1.5 to 2.15 times the area of ​​the cross-section enclosed by the inner wall of the first guide ring 410, and the dimension of the main body 210 along the axial direction is 150 mm to 170 mm. In this embodiment, the internal dimensions of the main body 210 are larger than those of the first guide ring 410. This design can further increase the volume of the expansion section. Water flowing in from the second inlet 120 can form a swirling flow after passing through the guide plate 221, guide groove 222 and inclined guide section 223, and flows along the inner wall of the main body 210 in a spiral trajectory. It can be understood that another identical drainage device can be set at the bottom of the drainage device. In this way, water flowing in from the first drainage device will flow into the first inlet 110 of the second drainage device, and the water flowing in from the first inlet 110 will also be a swirling flow. This allows a smooth air column to be formed in the middle of the drainage device. Under this water flow state, the water flow speed is reduced under the action of frictional resistance of the pipe wall and centrifugal force of rotation, forming a uniform flow. This is beneficial to improve the drainage performance of the pipe, reduce pressure fluctuations, not damage the water seal, prevent backflow of odor from the bathroom floor drain, reduce water flow noise, and improve drainage capacity.

[0048] In some embodiments of this application, the drainage device further includes a tapered pipe 300. One end of the tapered pipe 300 is connected to the bottom of the main body 210, and the other end is connected to the outlet 130. The inner diameter of the tapered pipe 300 near the main body 210 is larger than the inner diameter of the tapered pipe 300 near the outlet 130. In this embodiment, the water flowing in from the second inlet 120 forms a swirling flow along the inner wall of the expansion container 200. The tapered pipe 300 can guide the water to flow slowly inward, eventually merging with the water flowing in from the first inlet 110 at the bottom of the tapered pipe 300. The tapered pipe 300 allows the water flowing in from the second inlet 120 to adhere tightly to the inner wall of the drainage device, avoiding violent collisions between water entering from different inlets that could cause vibration and noise. Compared with drainage pipes in related technologies that do not have a tapered pipe 300, the drainage device in this embodiment can further reduce the vibration and noise generated during pipe use.

[0049] Please refer to Figure 4 In some embodiments of this application, the drainage device further includes a second guide ring 420. One end of the second guide ring 420 is connected to the tapered pipe 300, and the other end is connected to the outlet end 130. The inner diameter D3 of the second guide ring 420 near the tapered pipe 300 is larger than the inner diameter D4 of the second guide ring 420 near the outlet end 130. In this embodiment, the water flowing in from the first inlet end 110 and the second inlet end 120 converges in the tapered pipe 300 and continues to flow towards the second guide ring 420. Since the inner diameter D3 of the second guide ring 420 near the tapered pipe 300 is larger than the inner diameter D4 of the second guide ring 420 near the outlet end 130, the second guide ring 420 can guide the converged water to flow further inward.

[0050] In some embodiments of this application, the included angle of the cross section of the tapered tube 300 is 18° to 20°. In this embodiment, when the included angle of the cross section of the tapered tube 300 is 18° to 20°, it can better guide the spiral water flow and avoid the water flow falling directly and causing impact on the pipe.

[0051] In some specific embodiments, the inner diameter of the tapered tube 300 near the expansion container 200 is 0.1 mm to 0.5 mm larger than the inner diameter of the expansion tube, thereby avoiding large steps that could cause water to flow erratically when the water in the expansion container 200 flows into the tapered tube 300.

[0052] An embodiment of the second aspect of this application provides a drainage system. The drainage system includes the drainage device in any embodiment of the first aspect.

[0053] According to the drainage system in the embodiments of this application, since it includes the drainage device in any embodiment of the first aspect, it also has the beneficial effects of any embodiment of the first aspect. Specifically, the water to be drained can enter from the second inlet end 120 and flow to the main body 210 through the guide section 220. The water flows sequentially through the guide plate 221, the guide groove 222 and the inclined guide section 223 in the guide section 220. Since the guide groove 222 is connected to the guide plate 221 and the inclined guide section 223 in an arc transition manner, the water will flow along the inner wall of the drainage device during the flow process. When the water entering from the second inlet end 120 flows into the main body 210, the inclined guide section 223 can guide the water to flow along the inner wall of the main body 210, thereby avoiding the collision between the water entering from the first inlet end 110 and the water entering from the second inlet end 120 when they converge, thereby reducing the vibration and noise caused by the collision and extending the service life of the drainage pipe.

[0054] In some embodiments of this application, the drainage system further includes an inlet pipe and an outlet pipe 30. The inlet pipe is connected to a first inlet end 110 or a second inlet end 120, and the outlet pipe 30 is connected to an outlet end 130. The drainage system also includes a first guide ring 410 and a second guide ring 420. The first guide ring 410 is located inside the main body 210 and is connected to the first inlet end 110. The inner diameter of the first guide ring 410 near the inlet end is larger than the inner diameter of the inlet pipe. One end of the second guide ring 420 is connected to the main body 210, and the other end of the second guide ring 420 is connected to the outlet end 130. The inner diameter of the second guide ring 420 near the outlet end 130 is smaller than or equal to the inner diameter of the outlet pipe 30.

[0055] like Figure 11 As shown, the drainage system in this embodiment can include multiple drainage devices as described in the first aspect embodiment. The first inlet end 110 of the drainage device can be connected to the outlet of another drainage device or to a drainage riser. Figure 11 In the example, the first inlet 110 of the drainage device is connected to the first drain pipe 10, the second inlet 120 of the drainage device is connected to the second drain pipe 20, and the outlet 130 of the drainage device is connected to the outlet pipe 30. In addition, another identical drainage device can be connected to the top of the first drain pipe 10.

[0056] Figure 11The flow direction 510 of the second inlet 120 and the flow direction 520 of the first inlet 110 are shown. In this way, when the drainage system is used for gravity drainage, the water flow at the top can form a spiral film-like flow. Under this flow state, the water flow speed is reduced by the frictional resistance of the inner wall and the centrifugal force of rotation. When the water flows into the drainage device, it can be guided by the first guide ring 410 and fall into the conical pipe 300. The water flowing in from the second drain pipe 20 is guided by the guide part 220 of the drainage device to form a vortex flow, and then forms a vortex flow through the conical pipe 300. Finally, it is guided by the second guide ring 420 to the outlet pipe 30.

[0057] In addition, a water trap 40 can be installed at the end of the second drain pipe 20 away from the drain device. Figure 11 The water level line 41 is shown, which, when applied to a bathroom, can prevent backflow of odors. In related technologies, the drain riser is a straight pipe structure with a large step at the bottom. Furthermore, the water flow does not form a vortex, and the water flows down rapidly, resulting in an excessively thick water film on the pipe wall. This, or due to structural influences, can cause a central water mass to fall within the pipe, creating a clogging-like flow that leads to severe pressure fluctuations, thereby disrupting the water seal in the bathroom and causing backflow of odors. When using the drainage system in this embodiment, the water flow speed is reduced due to the frictional resistance of the inner wall and the centrifugal force of rotation, thus preventing severe pressure fluctuations within the pipe that could disrupt the water seal in the bathroom.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0059] All embodiments of this application are described in a related manner. For the same or similar parts between the embodiments, refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A drainage device, applied to a drainage pipe, characterized in that, The drainage device includes: The first water inlet is configured as a vertical water inlet; The second water inlet is configured as a horizontal water inlet; An expansion container includes a main body and a flow guide. The main body is tubular, with its top connected to a first water inlet. The sidewall of the main body communicates with the flow guide to form a fluid channel. The flow guide is connected to a second water inlet. The flow guide includes a guide plate, a guide groove, and an inclined flow guide section. The guide plate is located near the second water inlet. The guide groove is connected to the guide plate with a circular arc transition. The inclined flow guide section is connected to the guide groove with a circular arc transition. The inclined flow guide section is configured to guide water flow along the inner wall of the main body. The water inlet at the second water inlet flows along the inner wall of the main body after passing through the guide plate, the guide groove, and the inclined flow guide section in sequence. The water outlet is located at the bottom of the main body. The inclined guide section protrudes from the main body, and the maximum dimension of the plane containing the axis from the inner wall of the inclined guide section to the second water inlet end is 10 mm to 15 mm greater than the radius of the main body. The drainage device further includes a first guide ring, which is located inside the main body and connected to the first water inlet. The inner diameter of the first guide ring near the first water inlet is larger than the inner diameter of the first guide ring away from the first water inlet.

2. The drainage device according to claim 1, characterized in that, The guide groove is connected to the main body on the side away from the guide plate and forms a blocking part.

3. The drainage device according to claim 1, characterized in that, The second water inlet is tubular in shape, the guide plate has an angle of 40° to 50° with the axis of the second water inlet, and the inclined guide section has an angle of 35° to 45° with the axis of the main body.

4. The drainage device according to claim 1, characterized in that, The area of ​​the cross-section enclosed by the inner wall of the main body is 1.5 to 2.15 times the area of ​​the cross-section enclosed by the inner wall of the first guide ring, and the dimension of the main body along the axial direction is 150 mm to 170 mm.

5. The drainage device according to claim 1, characterized in that, The drainage device further includes a tapered pipe, one end of which is connected to the bottom of the main body and the other end of which is connected to the water outlet. The inner diameter of the tapered pipe near the main body is larger than the inner diameter of the tapered pipe near the water outlet.

6. The drainage device according to claim 5, characterized in that, The drainage device further includes a second guide ring, one end of which is connected to the tapered pipe and the other end of which is connected to the outlet. The inner diameter of the second guide ring near the tapered pipe is larger than the inner diameter of the second guide ring near the outlet.

7. The drainage device according to claim 5, characterized in that, The included angle of the cross section of the tapered tube is 18° to 20°.

8. A drainage system, characterized in that, Includes the drainage device according to any one of claims 1 to 7.

9. The drainage system according to claim 8, characterized in that, The drainage system further includes an inlet pipe and an outlet pipe. The inlet pipe is connected to the first inlet end or the second inlet end, and the outlet pipe is connected to the outlet end. The drainage system also includes a first guide ring and a second guide ring. The first guide ring is located inside the main body and is connected to the first inlet end. The inner diameter of the first guide ring near the inlet end is larger than the inner diameter of the inlet pipe. One end of the second guide ring is connected to the main body, and the other end of the second guide ring is connected to the outlet end. The inner diameter of the second guide ring near the outlet end is smaller than or equal to the inner diameter of the outlet pipe.

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