Lateral water outlet automatic drainer

Through the tortuous flow path and water flow barrier design of the side water outlet automatic drainer, the noise and odor prevention problems of traditional drainers are solved, and the silent and odor prevention effects are achieved.

CN223269316UActive Publication Date: 2025-08-26YUHUAN LONGWANG TECH CO LTD
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Patent Information

Application Number
CN202422435004.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-09
Publication Date
2025-08-26
Estimated Expiration
2034-10-09

AI Technical Summary

Technical Problem

Traditional automatic drainers are noisy and lack odor-proof structures when draining, resulting in air pollution.

Method used

A side water outlet automatic drainage device is designed, and the tortuous flow paths of the central pipe, the first drainage gap, the second drainage gap, the third drainage gap and the outer diversion channel are combined with the water flow barrier odor prevention design, so as to realize the tortuous flow of the water flow and the water flow barrier odor prevention.

Benefits of technology

Effectively reduce drainage noise and prevent the odor of the sewer, improving the quiet effect of drainage and air cleanliness.

✦ Generated by Eureka AI based on patent content.

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Abstract

An automatic drainer capable of discharging water laterally comprises a shell, water inlet holes formed in the left side and the right side of the upper portion of the shell and a plug arranged in an end opening in the upper end of the shell, an annular sealing step is arranged on the inner wall of the end opening in the upper end of the shell, and the lower end face of the plug is attached to the sealing step; the outer wall of the upper end of the plug is provided with a dismounting part attached to the upper end face of the shell. The dismounting part and the plug are integrally formed and are both made of rubber materials; a fixed seat positioned below the water inlet hole is screwed in the shell; the upper surface of the fixed seat is provided with a water collecting groove with a wide upper part and a narrow lower part; a central pipe communicated with the water collecting groove is arranged below the center of the fixed seat; an annular screw joint groove is formed in the inner wall of a port of the lower end of the shell; and a flow guide seat matched with the screw joint groove is in screw joint in the screw joint groove. According to the automatic drainer capable of discharging water from the side, noise generated during drainage can be effectively reduced, and meanwhile the deodorization effect can be achieved.
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Description

Technical Field

[0001] The utility model relates to a drain, in particular to an automatic drain with side water outlet. Background Art

[0002] An automatic drain is a device installed in a sink for drainage. When the sink needs to be drained, you only need to open the automatic drain through the plug located at the upper end of the automatic drain. The water in the sink will be discharged into the drainage pipe connected to the lower end of the automatic drain through the automatic drain, and then flow into the sewer connected to the drainage pipe to complete the drainage. The automatic drain is used on sinks with overflow holes. The sink has a mounting hole for installing the automatic drain, and the mounting hole and the overflow hole are connected by an overflow chamber. The automatic drain has water inlet holes on both sides that are connected to the overflow chamber, so that the water at a high water level in the sink directly flows into the automatic drain through the overflow hole, the overflow chamber, and the water inlet hole in turn, and then is directly discharged from the lower end port of the automatic drain, achieving the effect of automatic drainage.

[0003] The outer shell of traditional automatic drains is mostly tubular, so there is a straight channel inside. The water in the sink will flow vertically into the drainage pipe through the outer shell of the automatic drain. This vertical flow trajectory can easily cause the water flow to squeeze the air inside the outer shell of the automatic drain, producing a whistling sound, resulting in obvious noise when the automatic drain is draining.

[0004] At the same time, when the automatic drain shell is tubular, there is no odor-proof structure inside the automatic drain. In the actual use of the automatic drain, in order to facilitate drainage, the plug at the upper end of the automatic drain is often in the open state. Therefore, the odor in the sewer is stored in the internal space of the automatic drain and flows into the sink, causing air pollution. Summary of the Invention

[0005] The utility model aims to solve the existing technical problem and provide a side-outlet automatic drain, which can not only effectively reduce the noise during drainage, but also has the effect of preventing odor.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] The utility model discloses a side-outlet automatic drain, comprising a shell, water inlet holes arranged on the left and right sides of the upper part of the shell, and a plug arranged in the upper end port of the shell, the inner wall of the upper end port of the shell is provided with an annular sealing step, and the lower end surface of the plug is in contact with the sealing step; the upper end outer wall of the plug is provided with a disassembly portion in contact with the upper end surface of the shell; the disassembly portion and the plug are integrally formed and are both made of rubber material; a fixing seat located below the water inlet hole is screwed into the inner part of the shell; a water collecting groove which is wide at the top and narrow at the bottom is provided on the upper surface of the fixing seat; a water collecting groove which is in contact with the water collecting groove is provided below the center of the fixing seat A central pipe is connected to each other; an annular screw groove is provided on the inner wall of the lower end port of the shell; a guide seat matching it is screwed in the screw groove; an inner guide groove is provided in the center of the upper surface of the guide seat, and the lower end of the central pipe penetrates downward into the inner guide groove and is adjacent to the bottom of the inner guide groove; an annular outer guide groove is provided on the lower surface of the guide seat, and the outer guide groove encloses the inner guide groove; a plurality of water holes are provided on the upper surface of the guide seat that are connected to the bottom of the outer guide groove; the lower surface of the guide seat has a manual drainage structure, which can make the bottom of the inner guide groove directly connected to the outside world.

[0008] There is a first drainage gap between the lower end surface of the central tube and the bottom of the inner guide groove; there is a second drainage gap between the outer wall of the central tube and the inner wall of the inner guide groove, which is connected with the first drainage gap; there is a third drainage gap between the upper surface of the guide seat and the lower surface of the fixed seat, which is connected with the second drainage gap; the third drainage gap is connected with the outer guide groove through a water hole.

[0009] A connecting hole communicating with the water collecting trough is provided at the center of the lower surface of the fixing seat; an annular connecting groove is provided on the inner wall of the lower end opening of the connecting hole; the upper end surface of the center tube is fitted with the upper side groove wall of the connecting groove; the outer wall of the upper end of the center tube is provided with a connecting portion fitting with the upper side groove wall of the connecting groove; a plurality of through holes evenly distributed around the circumference are provided on the connecting portion; a plurality of screw holes communicating with the through holes are provided on the upper side groove wall of the connecting groove; a fixing screw passes upward through the through hole and is screwed into the screw hole, and the upper surface of the head of the fixing screw is fitted with the lower surface of the connecting portion.

[0010] The manual drainage structure includes a plurality of drainage holes provided on the lower surface of the guide seat, and the drainage holes are connected to the bottom of the inner guide groove; an opening and closing cover is screwed to the center of the lower end of the guide seat; the lower inner wall of the opening and closing cover covers and seals the lower end opening of the drainage hole; a movable hole connected to the bottom of the inner guide groove is provided in the center of the lower surface of the guide seat; a connecting rod is provided in the center of the lower inner wall of the opening and closing cover; the upper end of the connecting rod passes through the movable hole, the center pipe, the connecting hole, the water collecting trough in sequence and is provided with a rotating structure adjacent to the lower surface of the plug.

[0011] The rotating structure includes a telescopic tube that is sleeved on the outer part of the upper part of the connecting rod; the outer walls on both sides of the telescopic tube are provided with oblong holes that are connected to the internal space thereof; the upper end of the connecting rod is provided with a limit pin; the left and right ends of the limit pin are respectively located in the oblong holes on the left and right sides and fit into the upper inner walls of the oblong holes; the upper end of the telescopic tube is provided with a rotating handle.

[0012] The upper end of the connecting rod is provided with an axial hole matching the limit pin; the right end of the limit pin passes through the right oblong hole to the right and is provided with a limit head that fits the right outer wall of the telescopic tube, and the left end of the limit pin passes through the left oblong hole to the left and is screwed with a nut that fits the left outer wall of the telescopic tube.

[0013] A locking hole is provided in the center of the inner wall of the lower side of the opening and closing cover; a locking head is provided in the center of the lower end surface of the connecting rod to match the locking hole; the locking hole and the locking head are both regular hexagons; a screw hole is provided in the center of the lower end surface of the locking head; a through hole is provided in the center of the outer wall of the lower side of the opening and closing cover, which is connected to the screw hole; a connecting screw passes through the through hole upward and is screwed into the screw hole, and the upper surface of the head of the connecting screw fits with the outer wall of the lower side of the opening and closing cover.

[0014] The outer wall of the opening and closing cover is coplanar with the inner wall of the outer guide groove.

[0015] The beneficial effects of the utility model are:

[0016] Compared with the existing technology, when the side-outlet automatic drainer of the utility model structure is used for drainage, the water flows through the central pipe, the first drainage gap, the second drainage gap, the third drainage gap, the water hole, and the outer guide groove in sequence before being discharged to the outside. Different from the vertical downward drainage method, this drainage method enables the water flow to form a tortuous flow trajectory before being discharged to the automatic drainer shell, which can effectively buffer the pressure of the water flow and avoid the water flow directly squeezing the air in the shell to cause whistling sound, thereby achieving a noise reduction effect. The annular outer guide groove can make the water flow close to the inner wall of the drainage pipe when flowing from the shell into the drainage pipe, further improving the noise reduction effect.

[0017] Compared with the prior art, when the side-outlet automatic drain adopts the structure of the present invention drains water, the water in the second drainage gap needs to flow upward under the impetus of the subsequent water flow before it can flow into the third drainage gap. Therefore, after losing the impetus of the subsequent water flow, the water remaining in the second drainage gap will always continue in the second drainage gap before the next drainage. At this time, the second drainage gap, the first drainage gap and the central tube are all filled with water, forming a water flow barrier. When the odor in the sewer rises, it will be blocked by this water flow barrier, thereby effectively preventing the odor in the sewer from rising into the sink through the automatic drain and causing indoor air pollution, thereby achieving an anti-odor effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the utility model's side-outlet automatic drain;

[0019] Figure 2 yes Figure 1 An enlarged view of part A;

[0020] Figure 3 yes Figure 1 An enlarged view of part B;

[0021] Figure 4 It is a partial cross-sectional view of the utility model of the automatic drain with side water outlet. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] See also Figures 1 to 4 The utility model provides a side-outlet automatic drain, comprising a shell 1, water inlet holes 2 provided on the left and right sides of the upper part of the shell 1, and a plug 3 provided in the upper end port of the shell 1. The inner wall of the upper end port of the shell 1 is provided with an annular sealing step 4, and the lower end surface of the plug 3 is in contact with the sealing step 4; the upper outer wall of the plug 3 is provided with a disassembly portion 5 in contact with the upper end surface of the shell 1; the disassembly portion 5 and the plug 3 are integrally formed and are both made of rubber material; a fixing seat 6 located below the water inlet hole 2 is screwed into the shell 1; the upper surface of the fixing seat 6 is provided with a water collecting groove 7 which is wide at the top and narrow at the bottom; the lower center of the fixing seat 6 has a central hole which is connected to the water collecting groove 7 Core tube 8; an annular screw groove 9 is provided on the inner wall of the lower end port of the shell 1; a guide seat 10 matching it is screwed into the screw groove 9; an inner guide groove 11 is provided in the center of the upper surface of the guide seat 10, and the lower end of the center tube 8 penetrates downward into the inner guide groove 11 and is adjacent to the bottom of the inner guide groove 11; an annular outer guide groove 12 is provided on the lower surface of the guide seat 10, and the outer guide groove 12 encloses the inner guide groove 11; a plurality of water holes 13 are provided on the upper surface of the guide seat 10, which are connected to the bottom of the outer guide groove 12; the lower surface of the guide seat 10 has a manual drainage structure, which can make the bottom of the inner guide groove 11 directly connected with the outside world.

[0024] A first drainage gap 14 is provided between the lower end surface of the central tube 8 and the bottom of the inner guide groove 11; a second drainage gap 15 is provided between the outer wall of the central tube 8 and the inner wall of the inner guide groove 11, which is connected with the first drainage gap 14; a third drainage gap 16 is provided between the upper surface of the guide seat 10 and the lower surface of the fixed seat 6, which is connected with the second drainage gap 15; the third drainage gap 16 is connected with the outer guide groove 12 through the water hole 13.

[0025] A connecting hole 17 communicating with the water collecting tank 7 is provided at the center of the lower surface of the fixing seat 6; an annular connecting groove 18 is provided on the inner wall of the lower end of the connecting hole 17; the upper end surface of the central tube 8 is fitted with the upper side wall of the connecting groove 18; the outer wall of the upper end of the central tube 8 is provided with a connecting portion 19 fitting with the upper side wall of the connecting groove 18; a plurality of through holes 20 evenly distributed around the circumference are provided on the connecting portion 19; a plurality of screw holes 21 communicating with the through holes 20 are provided on the upper side wall of the connecting groove 18; a fixing screw 22 passes upward through the through hole 20 and is screwed into the screw hole 21, and the upper surface of the head of the fixing screw 22 is fitted with the lower surface of the connecting portion 19.

[0026] The manual drainage structure includes a plurality of drainage holes 23 provided on the lower surface of the guide seat 10, and the drainage holes 23 are connected to the bottom of the inner guide groove 11; an opening and closing cover 24 is screwed to the center of the lower end of the guide seat 10; the lower inner wall of the opening and closing cover 24 covers and seals the lower end of the drainage hole 23; a movable hole 25 connected to the bottom of the inner guide groove 11 is provided in the center of the lower surface of the guide seat 10; a connecting rod 26 is provided in the center of the lower inner wall of the opening and closing cover 24; the upper end of the connecting rod 26 passes through the movable hole 25, the center pipe 8, the connecting hole 17, the water collecting trough 7 in sequence and is provided with a rotating structure adjacent to the lower surface of the plug 3.

[0027] The rotating structure includes a telescopic tube 27 that is sleeved on the outer portion of the upper portion of the connecting rod 26; the outer walls on both sides of the telescopic tube 27 are provided with oblong holes 28 that are connected to the internal space thereof; the upper end of the connecting rod 26 has a limit pin 29; the left and right ends of the limit pin 29 are respectively located in the oblong holes 28 on the left and right sides and fit into the upper inner walls of the oblong holes 28; the upper end of the telescopic tube 27 is provided with a rotary handle 30.

[0028] The upper end of the connecting rod 26 is provided with an axial hole 31 that matches the limit pin 29; the right end of the limit pin 29 passes through the right oblong hole 28 to the right and is provided with a limit head 32 that fits with the right outer wall of the telescopic tube 27, and the left end of the limit pin 29 passes through the left oblong hole 28 to the left and is screwed with a nut 33 that fits with the left outer wall of the telescopic tube 27.

[0029] A locking hole 34 is provided in the center of the inner wall of the lower side of the opening and closing cover 24; a locking head 35 is provided in the center of the lower end surface of the connecting rod 26 to match the locking hole 34; the locking hole 34 and the locking head 35 are both regular hexagons; a screw hole 36 is provided in the center of the lower end surface of the locking head 35; a through hole 37 is provided in the center of the outer wall of the lower side of the opening and closing cover 24 to communicate with the screw hole 36; a connecting screw 38 passes upward through the through hole 37 and is screwed into the screw hole 36, and the upper surface of the head of the connecting screw 38 is in contact with the outer wall of the lower side of the opening and closing cover 24.

[0030] The outer wall of the opening and closing cover 24 is coplanar with the inner wall of the outer guide groove 12 .

[0031] The method of using the utility model is as follows:

[0032] When it is necessary to drain water through an automatic drain, the plug 3 can be held by the disassembly part, and then the plug 3 can be directly pulled out from the upper end port of the shell 1, so that the upper end port of the shell 1 can be in an open state. At this time, the water in the water tank will flow into the shell 1 through the upper end port of the shell 1, and then the water will flow into the central pipe under the guidance of the water collecting tank 7. At this time, the water will flow into the first drainage gap 14, and the water in the first drainage gap 14 will flow upward into the second drainage gap 15. When the water level in the second drainage gap 15 reaches a certain height, the water will enter the third drainage gap 16, and then flow downward through the water hole 13 into the outer guide groove 12, and finally flow into the drainage pipe connected to the lower end of the shell 1 through the lower notch of the outer guide groove 12, and finally be sent to the sewer.

[0033] It can be seen that when draining, the water flows through the central tube 8, the first drainage gap 14, the second drainage gap 15, the third drainage gap 16, the water hole 13, and the outer guide groove 12 in sequence before being discharged to the outside. Different from the vertical downward drainage method, this drainage method enables the water flow to form a tortuous flow trajectory before being discharged into the automatic drain casing, which can effectively buffer the pressure of the water flow and avoid the water flow directly squeezing the air in the casing 1 to cause a whistling sound, thereby achieving a noise reduction effect. The annular outer guide groove 12 can make the water flow close to the inner wall of the drainage pipe when flowing from the casing into the drainage pipe, further improving the noise reduction effect.

[0034] After the drainage is completed, since the water needs to flow upward to flow from the second drainage gap 15 into the third drainage gap 16, after losing the push of the subsequent water flow, the water remaining in the second drainage gap 15 will continue to stay in the second drainage gap 15 before the next drainage. At this time, the second drainage gap 15, the first drainage gap 14 and the central tube 8 are all filled with water, forming a water flow barrier. When the odor in the sewer rises, it will be blocked by this water flow barrier, thereby effectively preventing the odor in the sewer from rising into the sink through the automatic drain and causing indoor air pollution, thereby achieving an anti-odor effect.

[0035] If the user is worried about the smell of the accumulated water in the central tube 8, the first drainage gap 14 and the second drainage gap 15, the user can take the initiative to drain the water in the central tube 8, the first drainage gap 14 and the second drainage gap 15. At this time, just hold the handle 30 through the upper end of the shell 1 and pull the telescopic tube 27 upward. At this time, under the cooperation of the limit pin 29 and the oblong hole 28, the telescopic tube 27 will move upward along the trajectory of the oblong holes 28 on the left and right sides, and finally the handle 30 moves upward out of the shell 1. At this time, the user can The handle 30 rotates the telescopic tube 27. When the telescopic tube 27 rotates, the connecting rod 26 rotates synchronously, and the locking head 35 and the locking hole 34 are both regular hexagons. Therefore, when the connecting rod 26 rotates, the opening and closing cover 24 rotates accordingly. At this time, it is only necessary to screw the opening and closing cover 24 downward from the center of the lower end of the guide seat 10. The lower end of the drainage hole 23 is no longer blocked and sealed. The accumulated water in the central tube 8, the first drainage gap 14, and the second drainage gap 15 can be directly discharged into the drainage pipe connected to the lower end of the shell 1 through the drainage hole 23.

[0036] The connecting portion 19 is provided with a plurality of through holes 20 evenly distributed around the circumference, and the upper groove wall of the connecting groove 18 is provided with a plurality of screw holes 21 that penetrate the through holes 20. A fixing screw 22 passes upward through the through holes 20 and is screwed into the screw hole 21. The upper surface of the head of the fixing screw 22 fits with the lower surface of the connecting portion 19. This fixing method can not only ensure the stability of the center tube 8 when it is fixed on the fixing seat 6, but also facilitate the disassembly and assembly of the center tube 8.

[0037] The upper end of the connecting rod 26 is provided with an axial hole 31 that matches the limit pin 29. The right end of the limit pin 29 passes through the right oblong hole 28 to the right and is provided with a limit head 32 that fits the right outer wall of the telescopic tube 27. The left end of the limit pin 29 passes through the left oblong hole 28 to the left and is screwed with a nut 33 that fits the left outer wall of the telescopic tube 27. This fixing method not only enables the synchronous rotation of the telescopic tube 27 and the connecting rod 26, but also facilitates the disassembly and assembly of the telescopic tube 27.

[0038] A screw hole 36 is provided in the center of the lower end face of the locking head 35, and a through hole 37 which is connected to the screw hole 36 is provided in the center of the lower outer wall of the opening and closing cover 24. A connecting screw 38 passes through the through hole upward and is screwed into the screw hole 36. The upper surface of the head of the connecting screw 38 fits against the lower outer wall of the opening and closing cover 24. This fixing method can not only ensure the stability between the connecting rod 26 and the opening and closing cover 24, but also facilitate the disassembly and assembly between the connecting rod 26 and the opening and closing cover 24.

[0039] The outer wall of the opening and closing cover 24 is coplanar with the inner wall of the outer guide groove 12, which can effectively prevent the opening and closing cover 24 from forming an obstruction in the outer guide groove 12 and ensure that water flows smoothly through the outer guide groove 12 into the drainage pipe.

Claims

1. A side-outlet automatic drain, comprising a housing, water inlet holes provided on the left and right sides of the upper portion of the housing, and a plug provided in the upper end port of the housing, characterized in that: The inner wall of the upper end port of the shell is provided with an annular sealing step, and the lower end surface of the plug is in contact with the sealing step; the outer wall of the upper end of the plug is provided with a disassembly portion in contact with the upper end surface of the shell; the disassembly portion and the plug are integrally formed and are both made of rubber; a fixing seat located below the water inlet is screwed into the shell; a water collecting groove that is wide at the top and narrow at the bottom is provided on the upper surface of the fixing seat; a central tube that is connected to the water collecting groove is provided below the center of the fixing seat; the inner wall of the lower end port of the shell is provided with an annular screw Connecting groove; a guide seat matching it is screwed in the screw connection groove; an inner guide groove is provided in the center of the upper surface of the guide seat, and the lower end of the central tube is downwardly inserted into the inner guide groove and is adjacent to the bottom of the inner guide groove; an annular outer guide groove is provided on the lower surface of the guide seat, and the outer guide groove encloses the inner guide groove; a plurality of water holes are provided on the upper surface of the guide seat that are connected with the bottom of the outer guide groove; the lower surface of the guide seat has a manual drainage structure, which can make the bottom of the inner guide groove directly connected with the outside world.

2. The side-outlet automatic drain according to claim 1, characterized in that: There is a first drainage gap between the lower end surface of the central tube and the bottom of the inner guide groove; there is a second drainage gap between the outer wall of the central tube and the inner wall of the inner guide groove, which is connected with the first drainage gap; there is a third drainage gap between the upper surface of the guide seat and the lower surface of the fixed seat, which is connected with the second drainage gap; the third drainage gap is connected with the outer guide groove through a water hole.

3. The side-outlet automatic drainer according to claim 1, characterized in that: A connecting hole communicating with the water collecting trough is provided at the center of the lower surface of the fixing seat; an annular connecting groove is provided on the inner wall of the lower end opening of the connecting hole; the upper end surface of the center tube is fitted with the upper side groove wall of the connecting groove; the outer wall of the upper end of the center tube is provided with a connecting portion fitting with the upper side groove wall of the connecting groove; a plurality of through holes evenly distributed around the circumference are provided on the connecting portion; a plurality of screw holes communicating with the through holes are provided on the upper side groove wall of the connecting groove; a fixing screw passes upward through the through hole and is screwed into the screw hole, and the upper surface of the head of the fixing screw is fitted with the lower surface of the connecting portion.

4. The side-outlet automatic drainer according to claim 1, characterized in that: The manual drainage structure includes a plurality of drainage holes provided on the lower surface of the guide seat, and the drainage holes are connected to the bottom of the inner guide groove; an opening and closing cover is screwed to the center of the lower end of the guide seat; the lower inner wall of the opening and closing cover covers and seals the lower end opening of the drainage hole; a movable hole connected to the bottom of the inner guide groove is provided in the center of the lower surface of the guide seat; a connecting rod is provided in the center of the lower inner wall of the opening and closing cover; the upper end of the connecting rod passes through the movable hole, the center pipe, the connecting hole, the water collecting trough in sequence and is provided with a rotating structure adjacent to the lower surface of the plug.

5. The side-outlet automatic drain according to claim 4, characterized in that: The rotating structure includes a telescopic tube that is sleeved on the outer part of the upper part of the connecting rod; the outer walls on both sides of the telescopic tube are provided with oblong holes that are connected to the internal space thereof; the upper end of the connecting rod is provided with a limit pin; the left and right ends of the limit pin are respectively located in the oblong holes on the left and right sides and fit into the upper inner walls of the oblong holes; the upper end of the telescopic tube is provided with a rotating handle.

6. The side-outlet automatic drain according to claim 5, characterized in that: The upper end of the connecting rod is provided with an axial hole matching the limit pin; the right end of the limit pin passes through the right oblong hole to the right and is provided with a limit head that fits the right outer wall of the telescopic tube, and the left end of the limit pin passes through the left oblong hole to the left and is screwed with a nut that fits the left outer wall of the telescopic tube.

7. The side-outlet automatic drainer according to claim 4, characterized in that: A locking hole is provided in the center of the inner wall of the lower side of the opening and closing cover; a locking head is provided in the center of the lower end surface of the connecting rod to match the locking hole; the locking hole and the locking head are both regular hexagons; a screw hole is provided in the center of the lower end surface of the locking head; a through hole is provided in the center of the outer wall of the lower side of the opening and closing cover, which is connected to the screw hole; a connecting screw passes through the through hole upward and is screwed into the screw hole, and the upper surface of the head of the connecting screw fits with the outer wall of the lower side of the opening and closing cover.

8. The side-outlet automatic drain according to claim 4, characterized in that: The outer wall of the opening and closing cover is coplanar with the inner wall of the outer guide groove.