Drainage structure of counter basin

Abstract

The invention relates to the technical field of bathroom accessories, in particular to a counter basin drainage structure which comprises a first water passing piece and a second water passing piece which are sequentially installed in the water flow direction. The connecting piece comprises a compression nut, a clamping ring and a screw rod; the clamping ring comprises a circular ring part and a plurality of clamping pieces connected to the bottom end of the circular ring part, and a preset angle is formed between the clamping pieces and the horizontal plane of the circular ring part; the compression nut is provided with a first open hole, the circular ring part is provided with a second open hole, the compression nut compresses and installs the circular ring part on the second water passing piece, a screw head of the screw is fixed to the first water passing piece, and a rod body of the screw sequentially penetrates through the first water passing piece, the second water passing piece, the first open hole and the second open hole from top to bottom to be connected with the clamping piece in an abutting mode. Through the design that the clamping piece is clamped with the screw rod, the screw rod can be directly pushed in during installation, the overall installation time of the counter basin drainage structure is shortened, the screw rod can be screwed out around the clamping piece during disassembly, and the design of the clamping piece facilitates disassembly of the counter basin drainage structure.

Description

Technical Field

[0001] The invention relates to the technical field of bathrooms, and in particular to a basin drainage structure. Background Art

[0002] A drain is a drainage device placed in a bathtub, basin, etc. Traditional drains are connected to the upper and lower drainage structures of the drain by wrench locks or screws. In order to meet the upper and lower locking lengths, the length of the screw is generally long, which makes the screw connection and locking screw take a long time. The entire installation process is time-consuming and labor-intensive, and the installation efficiency of the drainage structure is very low.

[0003] Therefore, there is an urgent need to provide a basin drainage structure that is efficient, convenient and labor-saving to install. Summary of the invention

[0004] In order to solve the deficiencies existing in the prior art, the present invention provides a basin drainage structure, comprising a first water overflow piece and a second water overflow piece installed in sequence along the water flow direction, the first water overflow piece is installed on the upper part of the basin, the second water overflow piece is installed at the water outlet at the lower part of the basin, and the first water overflow piece and the second water overflow piece are fixed to the upper part and the lower part of the basin through a connecting piece; the connecting piece comprises a clamping nut, a clamping ring and a screw; the clamping ring comprises a circular ring portion and a plurality of clips connected to the bottom end of the circular ring portion, and a preset angle is formed between the plurality of clips and the horizontal plane of the circular ring portion; the clamping nut clamps the circular ring portion and installs it on the second water overflow piece; when installing the basin drainage structure, the screw head of the screw is fixed to the first water overflow piece, the screw passes through the first water overflow piece, the basin, the clamping nut and the second water overflow piece, is inserted into the clamping ring, and the screw is pushed down to a preset position, the clip of the clamping ring is clamped in the threaded groove of the screw, and the screw head is screwed to tighten the screw and the clip to lock the first water overflow piece and the second water overflow piece to the upper part and the lower part of the basin.

[0005] Furthermore, the preset angle ranges from 90° to 180°.

[0006] Furthermore, the number of cards is at least two, and the cards are installed on the edge of the circular ring at a preset distance around the center of the circular ring. The vertical distance from the clamping bottom end of the card connected to the uppermost part of the screw to the circular ring is smaller than the vertical distance from the clamping bottom end of the card connected to the lowermost part of the screw to the circular ring. When the basin drainage structure needs to be disassembled, the screw is screwed up to separate the screw from the card.

[0007] Furthermore, the difference between the vertical distance from the clamping bottom end of the uppermost card of the screw to the annular portion and the vertical distance from the clamping bottom end of the lowermost card of the screw to the annular portion is the height of several turns of the external thread of the screw.

[0008] Furthermore, the first water-passing member includes a first sleeve, a first fixing portion disposed on the top of the first sleeve, the first fixing portion is mounted on the upper portion of the drain outlet of the basin, and the first sleeve is passed through the drain channel of the basin; A first installation column is arranged inside the first sleeve. The first installation column is connected to the inside of the first sleeve through a first rib, and a first water passage is formed between the first ribs.

[0009] Furthermore, the first mounting column includes a first mounting portion and a first abutting portion, the first abutting portion is located below the first mounting portion, the first mounting portion and the first abutting portion are provided with a connected third opening, the diameter of the third opening of the first abutting portion decreases linearly from top to bottom, and the screw head of the screw is installed on the first abutting portion.

[0010] Furthermore, the second water flow member includes a second sleeve through which water flows and a second fixing portion arranged on the top of the second sleeve, the second fixing portion abuts against the bottom of the basin, a second mounting column is arranged inside the second sleeve, the second mounting column is connected to the inner wall of the second sleeve through a second rib, and a second water flow passage is formed between the second ribs; The second mounting column includes a second mounting portion and a second abutting portion, the second abutting portion is located below the second mounting portion, and the second mounting portion and the second abutting portion are provided with a fourth opening connected to each other for the screw rod to pass through.

[0011] Further, the clamping nut is provided with a first external thread, the interior of the second mounting portion is provided with a first internal thread, and the first external thread and the first internal thread are connected; The inner hole diameter of the second mounting portion is larger than the inner hole diameter of the second abutting portion, a boss is formed at the connection between the second mounting portion and the second abutting portion, and the clamping nut presses the annular portion of the clamping ring against the second abutting portion.

[0012] Furthermore, the clamping nut is provided with a first opening for the screw rod to pass through, and the diameter of the annular portion is larger than the diameter of the first opening of the clamping nut and smaller than or equal to the diameter of the cross section of the clamping nut.

[0013] Furthermore, the basin drainage structure also includes a cover body, which includes a top cover and a fixed column, the top of the fixed column is fixedly connected to the bottom of the top cover, the bottom of the fixed column is provided with a second external thread, the inner wall of the first mounting part of the first water transfer part is provided with a second internal thread, and the second external thread is threadedly connected to the second internal thread.

[0014] Compared with the prior art, the basin drainage structure provided by the present invention has a card-connected screw design, so that the screw can be directly pushed in during installation, reducing the overall installation time of the basin drainage structure. During disassembly, the screw can be unscrewed around the card, and the card design also facilitates the disassembly of the basin drainage structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0016] Figure 1 A schematic diagram of a basin drainage structure provided by an embodiment of the present invention; Figure 2 A schematic diagram of a basin drainage structure with a cover provided in one embodiment of the present invention; Figure 3 for Figure 2 Schematic diagram of the explosion structure; Figure 4 A front view schematic diagram of a basin drainage structure with a cover provided in one embodiment of the present invention; Figure 5 for Figure 4 AA section view; Figure 6 A schematic diagram of the front structure of a water stop ring provided in one embodiment of the present invention; Figure 7 A schematic diagram of the three-dimensional structure of a water stop ring provided in one embodiment of the present invention; Figure 8 A schematic diagram of the front structure of a compression nut provided in one embodiment of the present invention; Fig. 9 A schematic diagram of the three-dimensional structure of a compression nut provided in one embodiment of the present invention; Fig.10 A schematic diagram of the three-dimensional structure of a screw provided in one embodiment of the present invention; Fig.11 A schematic diagram of a three-dimensional structure of a first water flow member provided by an embodiment of the present invention from a first viewing angle; Fig.12 A schematic diagram of the stereoscopic structure of a first water flow member provided by an embodiment of the present invention from a second viewing angle; Fig.13 A schematic diagram of a three-dimensional structure of a second water-flowing member provided by an embodiment of the present invention from a first viewing angle; Fig.14 A schematic diagram of the stereoscopic structure of a second water transfer member from a second viewing angle provided by an embodiment of the present invention.

[0017] Reference numerals: DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0019] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] The present invention provides a basin drainage structure, such as Figure 1 As shown, it includes a first water overflow member 100 and a second water overflow member 200 installed in sequence along the water flow direction. The first water overflow member 100 is installed at the upper part of the basin, and the second water overflow member 200 is installed at the water outlet at the lower part of the basin. The first water overflow member 100 and the second water overflow member 200 are fixed to the upper and lower parts of the basin through a connecting member 300.

[0021] In one embodiment, if Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the basin drainage structure is also provided with a cover body 400.

[0022] like Figure 3 As shown, the connecting member 300 includes a compression nut 310, a retaining ring 320 and a screw 330; Figure 6 and Figure 7 As shown, the clamping ring 320 includes a circular portion 321 and a plurality of clips 322 connected to the bottom end of the circular portion 321 , and a preset angle is formed between the plurality of clips 322 and the horizontal plane of the circular portion 321 ; the clamping nut 310 presses the circular portion 321 to be installed on the second water transfer member 200 .

[0023] When installing the basin drainage structure, the screw head 331 of the screw 330 is fixed to the first water overflow part 100, the screw 330 passes through the first water overflow part 100, the basin, the clamping nut 310 and the second water overflow part 200, and is inserted into the clamping ring 320. The screw 330 is pushed down to a preset position, and the card 322 of the clamping ring 320 is clamped in the threaded groove of the screw 330. The screw head 331 is screwed to tighten the screw 330 and the card 322 to lock the first water overflow part 100 and the second water overflow part 200 to the upper and lower parts of the basin.

[0024] Specifically, Figure 8 and Fig. 9 As shown, the compression nut 310 is provided with a first opening 311. Figure 7 As shown, the annular portion 321 is provided with a second opening 323, and the first opening 311 and the second opening 323 are provided for the screw rod 330 to pass through the annular portion 321 of the clamping nut 310 and the snap ring 320. Fig.10 As shown, the screw 330 includes a screw head 331 and the screw 330. The screw head 331 is located at the top of the screw 330, and the diameter of its horizontal cross section is larger than the diameter of the horizontal cross section of the screw 330. The screw head 331 is clamped and fixed to the first water overflow member 100. The screw 330 passes through the first water overflow member 100, the second water overflow member 200, the locking nut 310 and the annular portion 321 of the clamping ring 320, and is clamped and fixed to the card 322 of the clamping ring 320, thereby fixing the first water overflow member 100 and the second water overflow member 200 to the upper and lower parts of the basin.

[0025] When implementing it, Figure 3 and Figure 4As shown, the screw rod 330 can be directly inserted into the clamping ring 320, and the screw rod 330 can be installed by pushing it down forcefully. When the screw rod 330 is pushed to the preset position, the card 322 will be clamped in the thread groove of the screw rod 330. When the screw rod 330 is clamped to the preset position, the screw rod 330 does not completely lock the first water overflow part 100 and the second water overflow part 200 on the upper and lower parts of the basin, and there is still a certain gap. At this time, the screw rod 330 and the card 322 can be further tightened to lock the first water overflow part 100 and the second water overflow part 200. 0 is tightly fixed and locked to the upper and lower parts of the basin. At this time, the clamping nut 310 presses the clamping ring 320 to install it on the second water overflow part 200. Through the clamping connection of the screw rod 330 and the card 322, the first water overflow part 100 and the second water overflow part 200 are fixed to the upper and lower parts of the basin. When the screw rod 330 needs to be removed, a rotation groove is opened on the top of the screw head 331 of the screw rod 330. The screw rod 330 is gradually rotated upward by using a screwdriver to rotate the rotation groove, thereby separating the screw rod 330 from the clamping ring 320. The design of clamping the screw rod 330 with the card 322 allows the screw rod 330 to be directly pushed in during installation, which reduces the installation time of the overall basin drainage structure compared to the prior art, and the design of the card 322 also facilitates the disassembly of the basin drainage structure.

[0026] Preferably, the shape of the rotating groove is hexagonal or cross-shaped, matching the shape of a hexagonal wrench or a screwdriver.

[0027] In one embodiment, the preset angle ranges from 90° to 180°. Figure 6 As shown, the preset angle is greater than 90° and less than 180°, and the specific size is determined by the size of the card 322 and the diameter of the rod body 332 of the screw 330.

[0028] In one embodiment, if Figure 6 As shown, the card 322 is installed on the edge of the circular portion 321 at a preset distance around the center of the circular portion 321, and the vertical distance from the clamping bottom end of the card 322 connected to the uppermost part of the screw 330 to the circular portion 321 is smaller than the vertical distance from the clamping bottom end of the card 322 connected to the lowermost part of the screw 330 to the circular portion 321.

[0029] Furthermore, the number of cards 322 is at least two, and the difference between the vertical distance from the clamping bottom end of the card 322 at the top of the screw 330 to the annular portion 321 and the vertical distance from the clamping bottom end of the card 322 at the bottom of the screw 330 to the annular portion 321 is the height of several turns of the external thread of the screw 330.

[0030] In a preferred embodiment, if Figure 6As shown, the number of cards 322 can be two, namely the first card 322a and the second card 322a. The difference between the vertical distance from the clamping end of the first card 322a to the annular portion 321 and the vertical distance from the clamping end of the second card 322b to the annular portion 321 is the distance of half a circle of the external thread height of the screw 330.

[0031] Specifically, the first card 322a and the second card 322b are fixed in the thread grooves of the screw rod 330 with a difference of half a circle, which is convenient for clamping during installation and for rotating the rod body 332 to screw the screw rod 330 out of the card 322 during disassembly.

[0032] It should be noted that the number of cards 322 is not limited to two, but can also be three or four, wherein the difference between the vertical distance from the clamping bottom end of the card 322 at the top of the screw 330 to the annular portion 321 and the vertical distance from the clamping bottom end of the card 322 at the bottom of the screw 330 to the annular portion 321 can be the height of one circle of the external thread of the screw 330, and multiple circles can be set according to actual conditions, which is not limited here.

[0033] In one embodiment, if Fig.11 and Fig.12 As shown, the first water flow member 100 includes a first sleeve 110, a first fixing portion 120 arranged on the top of the first sleeve 110, the first fixing portion 120 is installed on the upper part of the basin drain outlet, and the first sleeve 110 is passed through the drainage channel of the basin; a first mounting column 130 is arranged inside the first sleeve 110, and the first mounting column 130 is connected to the inside of the first sleeve 110 through a first rib 140, and a first water flow passage 150 is formed between the first ribs 140.

[0034] Preferably, the first ribs 140 are arranged around the first mounting column 130 at a preset distance, and the number of the first ribs 140 is two, but the number of the first ribs 140 is not limited to two, and may also be three, four, etc.

[0035] Specifically, the first fixing part 120 is connected to the first sleeve 110, and the first fixing part 120 is mounted on the drain outlet of the basin. A circular sealing ring 500 is also arranged around the bottom of the first fixing part 120 and the drain outlet of the basin to prevent water from leaking out from between the first water passing part 100 and the basin wall. The first sleeve 110 is inserted into the drainage channel of the basin. In order to fit the drainage channel, the first sleeve 110 is a hollow cylindrical structure, and two first ribs 140 are arranged to fix the first installation column 130 inside the first sleeve 110. The first installation column 130 is also a hollow cylindrical structure, and the axis of the first installation column 130 coincides with the axis of the first sleeve 110. The first rib 140 and the side wall of the first installation column 130 and the side wall of the basin form a water passing channel for downward flow.

[0036] In one embodiment, the first mounting column 130 includes a first mounting portion 131 and a first abutting portion 132, the first abutting portion 132 is located below the first mounting portion 131, the first mounting portion 131 and the first abutting portion 132 are provided with a connected third opening 133, the diameter of the third opening 133 of the first abutting portion 132 decreases linearly from top to bottom, and the screw head 331 of the screw 330 is installed on the first abutting portion 132.

[0037] Preferably, the rod body 332 of the screw rod 330 passes through the opening of the first abutting portion 132 and enters the second water-passing member 200. The screw head 331 of the screw rod 330 abuts against the four walls of the first abutting portion 132. The horizontal cross-section of the third opening 133 of the abutting portion is circular, which matches the shape of the screw head 331. The diameter of the third opening 133 of the first abutting portion 132 decreases linearly from top to bottom. The diameter of the bottommost opening is equal to or slightly larger than the diameter of the screw rod 330, and smaller than the diameter of the screw head 331 of the screw rod 330, so as to fix the upper end of the screw rod 330 to the first abutting portion 132.

[0038] In one embodiment, if Fig.13 and Fig.14 As shown, the second water flow part 200 includes a second sleeve 210 through which water flows and a second fixing portion 220 arranged on the top of the second sleeve 210, the second fixing portion 220 abuts against the bottom of the basin, and a second mounting column 230 is arranged inside the second sleeve 210. The second mounting column 230 is connected to the inner wall of the second sleeve 210 through a second rib 240, and a second water flow passage 250 is formed between the second ribs 240.

[0039] Preferably, the second ribs 240 are arranged around the second mounting column 230 at a preset distance, and the number of the second ribs 240 is four, but the number of the second ribs 240 is not limited to four, and may also be two, three, etc.

[0040] Specifically, the second fixing portion 220 abuts against the bottom of the basin, and the second fixing portion 220 is adapted to the shape of the bottom of the basin. Preferably, a sealing ring 500 is also provided between the second fixing portion 220 and the bottom of the basin to prevent water from seeping out from between the second fixing portion 220 and the bottom of the basin. The lower part of the second sleeve 210 is provided with a third external thread 211 of a preset length, and the third external thread 211 is used for threaded connection with a drainage pipe.

[0041] In one embodiment, the second sleeve 210 includes a second mounting portion 231 and a second abutting portion 232 , wherein the second abutting portion 232 is located below the second mounting portion 231 , and the second mounting portion 231 and the second abutting portion 232 are provided with a fourth opening 233 communicating with each other for the screw rod 330 to pass through.

[0042] In one embodiment, the connecting member 300 is also provided with a clamping nut 310, and the clamping nut 310 is provided with a first external thread 312. The interior of the second mounting portion 231 is provided with a first internal thread 234, and the first external thread 312 and the second internal thread 134 are threadedly connected; the inner hole diameter of the second mounting portion 231 is larger than the inner hole diameter of the second abutting portion 232, and a boss 235 is formed at the connection between the second mounting portion 231 and the second abutting portion 232, and the clamping nut 310 presses the annular portion 321 of the retaining ring 320 to abut against the top of the second abutting portion 232. Specifically, the clamping nut 310 presses the annular portion 321 of the retaining ring 320 against the boss 235. The card 322 passes through the boss 235 and is enclosed in the hollow accommodation space of the second abutting portion 232, thereby ensuring that the card 322 will not be damaged by external forces. The clamping nut 310 is threadedly connected to the second mounting portion 231 of the second water transfer member 200, thereby ensuring that the retaining ring 320 is firmly connected to the second water transfer member 200.

[0043] Preferably, the diameter of the annular portion 321 is greater than the diameter of the first opening 311 of the clamping nut 310, and less than or equal to the diameter of the cross section of the clamping nut 310; this ensures that the clamping nut 310 tightens the annular portion 321 in the second water flow member 200, thereby ensuring the stability of the installation.

[0044] In one embodiment, if Figure 2 , Figure 3 As shown, the basin drainage structure also includes a cover body 400, the cover body 400 includes a top cover 410 and a fixing column 420, the top of the fixing column 420 is fixedly connected to the bottom of the top cover 410, the bottom of the fixing column 420 is provided with a second external thread 421, the inner wall of the first mounting portion 131 of the first water transfer member 100 is provided with a second internal thread 134, and the second external thread 421 is threadedly connected to the second internal thread 134.

[0045] Specifically, after the cover 400 is installed, there will be a gap of a certain height between the cover and the drain of the basin, which is convenient for water to pass through, and the gap of the cover 400 can play a guiding role to a certain extent, making the water discharge smoother; the material and color of the top cover 410 are the same as those of the basin, and the horizontal cross-section of the top cover 410 is circular, which is the same shape as the drain of the basin, but the diameter is larger than the drain of the basin. The setting of the top cover 410 can well cover the drain of the basin and the bottom drainage structure, making the basin more beautiful as a whole. And the bottom of the fixing column 420 is threadedly connected to the first mounting portion 131, which is convenient for the disassembly and installation of the cover 400.

[0046] The present invention also provides a basin, which includes the basin drainage structure as described in the above embodiment.

[0047] Although the terms such as first water-passing member, first sleeve, first fixing part, first mounting column, first mounting part, first abutting part, third opening, second internal thread, first rib, first water-passing passage, second water-passing member, second sleeve, third external thread, second fixing part, second mounting column, second mounting part, second abutting part, fourth opening, first internal thread, boss, second rib, second water-passing passage, connector, compression nut, first opening, first external thread, snap ring, annular part, card, first card, second card, second opening, screw, screw head, rod body, cover body, top cover, fixing column, second external thread, sealing ring, etc. are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A basin drainage structure, characterized in that: It comprises a first water overflow member and a second water overflow member which are sequentially installed along the water flow direction, wherein the first water overflow member is installed at the upper part of the basin, and the second water overflow member is installed at the water outlet at the lower part of the basin, and the first water overflow member and the second water overflow member are fixed to the upper part and the lower part of the basin through a connecting member; The connecting member includes a clamping nut, a clamping ring and a screw; the clamping ring includes a circular ring portion and a plurality of cards connected to the bottom end of the circular ring portion, and a preset angle is formed between the plurality of cards and the horizontal plane of the circular ring portion; the clamping nut presses the circular ring portion to be installed on the second water-passing member; When installing the basin drainage structure, the screw head of the screw is fixed to the first water overflow part, the screw passes through the first water overflow part, the basin, the clamping nut and the second water overflow part, and is inserted into the clamping ring. The screw is pushed down to a preset position, and the card of the clamping ring is clamped in the threaded groove of the screw. The screw head is screwed to tighten the screw and the card to lock the first water overflow part and the second water overflow part to the upper and lower parts of the basin.

2. The basin drainage structure according to claim 1, characterized in that: The preset angle ranges from 90° to 180°.

3. The basin drainage structure according to claim 1, characterized in that: There are at least two cards, and the cards are installed on the edge of the circular ring at a preset distance around the center of the circular ring. The vertical distance from the clamping bottom end of the card connected to the uppermost part of the screw to the circular ring is smaller than the vertical distance from the clamping bottom end of the card connected to the lowermost part of the screw to the circular ring. When the basin drainage structure needs to be disassembled, the screw is screwed up to separate the screw from the card.

4. The basin drainage structure according to claim 3, characterized in that: The difference between the vertical distance from the clamping bottom end of the card at the uppermost part of the screw to the annular portion and the vertical distance from the clamping bottom end of the card at the lowermost part of the screw to the annular portion is the height of several turns of the external thread of the screw.

5. The basin drainage structure according to claim 1, characterized in that: The first water transfer member includes a first sleeve, a first fixing portion disposed on the top of the first sleeve, the first fixing portion is installed on the upper part of the basin drain port, and the first sleeve is passed through the drainage channel of the basin; A first installation column is arranged inside the first sleeve. The first installation column is connected to the inside of the first sleeve through a first rib, and a first water passage is formed between the first ribs.

6. The basin drainage structure according to claim 5, characterized in that: The first mounting column includes a first mounting portion and a first abutting portion, the first abutting portion is located below the first mounting portion, the first mounting portion and the first abutting portion are provided with a third opening connected thereto, the diameter of the third opening of the first abutting portion decreases linearly from top to bottom, and the screw head of the screw is mounted on the first abutting portion.

7. The basin drainage structure according to claim 1, characterized in that: The second water flow member includes a second sleeve through which water flows and a second fixing portion arranged on the top of the second sleeve, the second fixing portion abuts against the bottom of the basin, a second mounting column is arranged inside the second sleeve, the second mounting column is connected to the inner wall of the second sleeve through a second rib, and a second water flow passage is formed between the second ribs; The second mounting column includes a second mounting portion and a second abutting portion, the second abutting portion is located below the second mounting portion, and the second mounting portion and the second abutting portion are provided with a fourth opening connected to each other for the screw rod to pass through.

8. The basin drainage structure according to claim 7, characterized in that: The compression nut is provided with a first external thread, the interior of the second mounting portion is provided with a first internal thread, and the first external thread is connected to the first internal thread; The inner hole diameter of the second mounting portion is larger than the inner hole diameter of the second abutting portion, a boss is formed at the connection between the second mounting portion and the second abutting portion, and the clamping nut presses the annular portion of the retaining ring against the second abutting portion.

9. The basin drainage structure according to claim 8, characterized in that: The clamping nut is provided with a first opening for the screw rod to pass through, and the diameter of the annular portion is larger than the diameter of the first opening of the clamping nut and smaller than or equal to the diameter of the cross section of the clamping nut.

10. The basin drainage structure according to claim 6, characterized in that: The basin drainage structure also includes a cover body, which includes a top cover and a fixing column, the top of the fixing column is fixedly connected to the bottom of the top cover, the bottom of the fixing column is provided with a second external thread, the inner wall of the first mounting portion of the first water transfer part is provided with a second internal thread, and the second external thread is threadedly connected to the second internal thread.

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