Flow-increasing drainage head and drainage valve

Abstract

The flow-increasing drainage head comprises a main body, the main body is provided with a drainage hole, and a first flow guide structure is arranged in the drainage hole; the first flow guide structure comprises a plurality of flow guide grooves which are arranged around the axis of the drainage hole at intervals, and the flow guide grooves are used for driving water passing through the flow guide grooves to rotate downwards so as to increase the water flow speed. According to the flow-increasing drainage head provided by the invention, the water flow passing through the flow-increasing drainage head can be changed from an irregular disordered state into a regularly-rotating downward vortex, so that the drainage speed is increased, finally, the sanitary ware adopting the flow-increasing drainage head can be flushed with the water flow at a higher speed, and the flushing effect of the sanitary ware is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sanitary ware, and in particular to a flow-increasing drainage head and a drainage valve. Background Art

[0002] In the sanitary ware industry, the "drain valve" inside sanitary ware products such as toilets, wall-mounted water tanks, and hidden water tanks is a key component responsible for flushing excrement into the sewer. The flushing effect of the product is directly related to the flushing cleanliness, and a large part of the flushing effect depends on the drainage flow rate. With the same water consumption, if the drainage rate of the drain valve increases, it can form a greater flushing pressure.

[0003] A conventional drain valve generally includes a drain head and a switch mechanism for controlling the draining of the drain head. The drain head is generally straight, that is, the drain hole inside the drain head extends in a straight line. Since the drain valve is installed in a water tank, and the cross-section of the water tank is much larger than the diameter of the drain hole, the moment the existing drain valve is opened, the surrounding water will rush to the upper end of the drain hole, and then pass through the drain hole and be discharged from the lower end of the drain hole. In this process, the water flow is very turbulent and irregular. In addition, when a large amount of water in the water tank enters the narrow drain hole, it is easy to form a local vacuum adsorption effect (for example, when a full mineral water bottle is inverted and then opened, a local vacuum adsorption effect will be formed, resulting in a low drainage speed), resulting in the existing drain head The drainage speed is not fast enough. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a flow-increasing drainage head, which can change the water flow passing through the flow-increasing drainage head from an irregular turbulent state into a regularly rotating downward vortex, thereby increasing the drainage speed, and finally enabling the sanitary ware using the flow-increasing drainage head to be flushed with a higher speed water flow, thereby improving the flushing effect of the sanitary ware.

[0005] The present invention also provides a drainage valve having the above-mentioned flow-increasing drainage head.

[0006] According to the first aspect of the present invention, the flow-increasing drainage head comprises a main body, the main body is provided with a drainage hole, and a first guide structure is arranged in the drainage hole; wherein the first guide structure comprises a plurality of guide grooves arranged at intervals around the axis of the drainage hole, and the guide grooves are used to drive the water passing through the guide grooves to produce a rotating downward movement to increase the water flow velocity.

[0007] The flow-increasing drainage head according to the embodiment of the present invention has at least the following beneficial effects: the flow-increasing drainage head provided by the present invention has an inner wall of a drainage hole provided with a first flow-guiding structure, and the first flow-guiding structure can play a vortex effect, so that the water flow flowing through the first flow-guiding structure changes from an irregular and chaotic state to a regularly rotating downward vortex, while destroying the effect of local vacuum adsorption. Thus, the vortex speed-increasing effect of the first flow-guiding structure ultimately increases the water flow speed, thereby achieving an improved drainage speed. Therefore, when sanitary ware adopts the flow-increasing drainage head provided by the present invention, the sanitary ware can be flushed with a higher speed of water at the moment of flushing, thereby improving the flushing effect of the sanitary ware.

[0008] According to some embodiments of the present invention, the guide grooves are arranged in a spiral.

[0009] According to some embodiments of the present invention, the guide groove is recessed on the inner wall of the drainage hole, and the inner wall of the drainage hole forms a guide portion between two adjacent guide grooves; or, the first guide structure includes a plurality of spirally arranged guide ribs, and the guide ribs are provided on the inner wall of the drainage hole, and the guide groove is formed by enclosing two corresponding adjacent guide ribs and the inner wall of the drainage hole.

[0010] According to some embodiments of the present invention, the direction of rotation of the guide groove is counterclockwise or clockwise.

[0011] According to some embodiments of the present invention, the distance between the bottom wall of the guide groove and the axis of the drainage hole gradually decreases along the drainage direction of the drainage hole.

[0012] According to some embodiments of the present invention, the outer diameter of one end of the main body is 2 inches or 3 inches.

[0013] According to some embodiments of the present invention, a pipe connection structure is provided at one end of the main body.

[0014] According to some embodiments of the present invention, the pipe connection structure includes a stud and a bottom hook, the stud is connected to the main body, the bottom hook is screwed to the stud, and the bottom hook is arranged opposite to the drainage hole.

[0015] According to some embodiments of the present invention, the pipe connection structure includes a connection thread provided on the main body.

[0016] According to some embodiments of the present invention, it can be applied to a cartridge type drain valve or a float type drain valve.

[0017] The drain valve according to the second aspect of the present invention comprises the above-mentioned flow-increasing drain head.

[0018] The drain valve according to the embodiment of the present invention has at least the following beneficial effects: the drain valve provided by the present invention can increase the drainage speed by adopting the above-mentioned flow-increasing drainage head. Therefore, when sanitary ware adopts the drain valve provided by the present invention, the sanitary ware can be flushed with a higher speed of water flow at the moment of flushing, thereby improving the flushing effect of the sanitary ware.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 A schematic diagram of a flow-increasing drainage head (applicable to a floating drainage valve and with a guide groove recessed on the inner wall of a drainage hole and having a connecting thread) according to an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of a flow-increasing drainage head (applicable to a floating drainage valve and having a flow guide portion protruding from the inner wall of the drainage hole and having a connecting thread) according to an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of a flow-increasing drainage head (applicable to a floating drainage valve and with a guide groove recessed on the inner wall of the drainage hole and applicable to installing a bottom hook) according to an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of a flow-increasing drainage head (applicable to a floating drainage valve and with a flow guide portion protruding from the inner wall of the drainage hole and applicable to installing a bottom hook) according to an embodiment of the present invention;

[0025] Figure 5 for Figure 4 A cross-sectional view of a flow-increasing drainage head is shown;

[0026] Figure 6 for Figure 3 A bottom schematic diagram of a flow-enhancing drainage head is shown;

[0027] Figure 7 It is a schematic diagram of a flow-increasing drainage head (applicable to a cylindrical drainage valve and with a guide groove recessed on the inner wall of the drainage hole and applicable to installing a bottom hook) according to an embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of a flow-increasing drainage head (applicable to a cylindrical drainage valve and with a flow guide portion protruding from the inner wall of the drainage hole and applicable to installing a bottom hook) according to an embodiment of the present invention;

[0029] Fig. 9It is a schematic diagram of a flow-increasing drainage head (applicable to a cylindrical drainage valve and with a guide groove recessed on the inner wall of the drainage hole and having a connecting thread) according to an embodiment of the present invention;

[0030] Fig.10 It is a schematic diagram of a flow-increasing drainage head (applicable to a cylindrical drainage valve and having a flow guide portion protruding from the inner wall of the drainage hole and having a connecting thread) according to an embodiment of the present invention;

[0031] Fig.11 for Fig. 9 A cross-sectional view of a flow-increasing drainage head is shown;

[0032] Fig.12 A schematic diagram of a drain valve (a cylindrical drain valve with a flow-increasing drain head and connecting threads) according to an embodiment of the present invention;

[0033] Fig.13 It is a schematic diagram of a drain valve (a cylindrical drain valve with a bottom hook installed on a flow-increasing drain head) according to an embodiment of the present invention;

[0034] Fig.14 for Fig.11 A schematic diagram of a switch mechanism of a drain valve is shown;

[0035] Fig.15 for Fig.12 A cross-sectional view of a flow-increasing drainage head is shown;

[0036] Fig.16 A schematic diagram of a drain valve (a floating drain valve with a flow-increasing drain head and connecting threads) according to an embodiment of the present invention;

[0037] Fig.17 It is a schematic diagram of a drainage valve (a floating drainage valve with a bottom hook installed on a flow-increasing drainage head) according to an embodiment of the present invention;

[0038] Fig.18 for Fig.15 A schematic diagram of a drain valve (with a second flow-guiding structure arranged on the cover) is shown.

[0039] Cylinder-type drain valve 01, floating-type drain valve 02, main body 110, drain hole 111, first guide structure 112, guide groove 1121, guide part 1122, guide rib 1123, pipe connection structure 113, stud 1131, bottom hook 1132, connecting thread 1133, connecting part 120, avoidance hole 121, water inlet 122, clamping groove 123, mounting part 130, connecting arm 131, switch mechanism 200, sealing cover 210, buoyancy part 211, second guide structure 220, guide vane 221, outer cylinder 230, clamping part 231, operating part 240, transmission assembly 250, rotating arm 260. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0044] Reference Figures 1 to 4 , Figures 7 to 10 The flow-increasing drainage head according to the first embodiment of the present invention includes a main body 110, the main body 110 is provided with a drainage hole 111, and a first guide structure 112 is arranged in the drainage hole 111; wherein the first guide structure 112 includes a plurality of guide grooves 1121 arranged at intervals around the axis of the drainage hole 111, and the guide grooves 1121 are used to drive the water passing through the guide grooves 1121 to produce a rotating downward movement to increase the water flow speed.

[0045] The flow-increasing drainage head provided by the present invention has an inner wall of a drainage hole 111 provided with a first guide structure 112. The first guide structure 112 can play a vortex effect, so that the water flow flowing through the first guide structure 112 changes from an irregular and chaotic state to a regularly rotating downward vortex. At the same time, the center of the vortex is usually a through hole without water flow to destroy the effect of local vacuum adsorption. Therefore, through the vortex speed-increasing effect of the first guide structure 112, the water flow speed is ultimately increased, thereby achieving an increased drainage speed. Therefore, when sanitary ware adopts the flow-increasing drainage head provided by the present invention, the sanitary ware can be flushed with a higher speed of water at the moment of flushing, thereby improving the flushing effect of the sanitary ware, reducing the water flow required for flushing, and achieving water saving.

[0046] Reference Figure 1 , Figure 3 , Figure 7 and Fig. 9 According to some embodiments of the present invention, the guide grooves 1121 are arranged in a spiral shape to effectively guide the water flow passing through the guide grooves 1121 to form a rotating downward vortex.

[0047] It should be noted that, in other embodiments, the guide groove 1121 may also be arranged in a straight line, and the guide groove 1121 is inclined relative to the axis of the drainage hole 111, thereby, the guide groove 1121 may also guide the water flow passing through the guide groove 1121 to form a rotating downward vortex.

[0048] Reference Figure 1 , Figure 3 , Figure 7 and Fig. 9 According to some embodiments of the present invention, the guide groove 1121 is recessed in the inner wall of the drainage hole 111, and the inner wall of the drainage hole 111 forms a guide portion 1122 between two adjacent guide grooves 1121. With this arrangement, the first guide structure 112 can be formed by the main body 110 through stamping and other processes.

[0049] Reference Figure 2 , Figure 4 , Figure 8 and Fig.10 In other embodiments, the first guide structure 112 includes a plurality of guide ribs 1123 arranged in a spiral shape, and the guide ribs 1123 are disposed on the inner wall of the drainage hole 111. The guide groove 1121 is formed by two corresponding adjacent guide ribs 1123 and the inner wall of the drainage hole 111, wherein the inner diameter of the drainage hole 111 gradually decreases along the drainage direction at the position where the guide ribs 1123 are disposed. With this arrangement, during the production process, the guide ribs 1123 can be formed together with the main body 110 through mold casting, injection molding or other processes.

[0050] Reference Figure 5 and Fig.11According to some embodiments of the present invention, the distance between the bottom wall of the guide groove 1121 and the axis of the drainage hole 111 gradually decreases along the drainage direction of the drainage hole 111. According to the principle of fluid mechanics, the diameter of the vortex formed by the water flow passing through the drainage hole 111 gradually decreases along the drainage direction of the drainage hole 111. Through the above configuration, the guide groove 1121 adapts to the change in the diameter of the vortex, so that the first guide structure 112 can better guide the water flow to form a vortex, thereby further improving the drainage speed.

[0051] Reference Figure 5 and Fig.11 According to some embodiments of the present invention, the spacing s between the guide portion 1122 (or the guide rib 1123) and the axis of the drain hole 111 remains unchanged or gradually increases along the drainage direction of the drain hole 111. According to the principles of fluid mechanics, the diameter of the vortex formed by the water flow passing through the drain hole 111 gradually decreases along the drainage direction of the drain hole 111. The present invention keeps the spacing s between the guide portion 1122 and the axis of the drain hole 111 unchanged or gradually increases along the drainage direction of the drain hole 111, so that the end of the guide portion 1122 away from the water inlet end of the drain hole 111 avoids the vortex, reduces the resistance of the guide portion 1122 to the vortex, and further improves the drainage speed.

[0052] It is conceivable that the first flow guide structure 112 may also be arranged in other ways. For example, the first flow guide structure 112 may include a flow guide ring. The flow guide groove 1121 and the flow guide portion 1122 are formed on the inner wall of the flow guide ring. The flow guide ring is located in the drain hole 111 and abuts against the inner wall of the drain hole 111. During the production process, the flow guide ring and the drain hole 111 are formed separately and finally assembled together. With this arrangement, the outer diameter of the flow guide ring can be adapted to the drain hole 111 of the existing drain head. Thus, the drain hole 111 of the existing drain head can be installed with the flow guide ring to achieve an upgrade.

[0053] Reference Figures 12 to 15 According to some embodiments of the present invention, the above-mentioned flow-increasing drainage head can be applied to a cylindrical drainage valve 01. The outer shape of the switch mechanism 200 of the cylindrical drainage valve 01 is cylindrical.

[0054] Reference Figures 16 to 18 In other embodiments, the above-mentioned flow-increasing drainage head can also be applied to the floating drainage valve 02. Among them, the switch mechanism 200 of the floating drainage valve 02 is set to a floating type.

[0055] It should be noted that the flow-increasing drainage head provided by the present invention can also be applied to other types of drainage valves except the cylindrical type and the floating type.

[0056] In the prior art, the size of the drain head of the drain valve is usually 2 inches or 3 inches, that is, the outer diameter of one end of the drain head used for installation on the pipe is 2 inches or 3 inches.

[0057] Similarly, the size of the main body 110 of the flow-increasing drainage head provided by the present invention can also be set to 2 inches or 3 inches to adapt to the pipes in existing sanitary ware. Figure 5 and Fig.11 The outer diameter D of the lower end of the middle body 110 is 2 inches or 3 inches.

[0058] Of course, it is conceivable that the flow-increasing drainage head provided by the present invention can also be set to other sizes and models according to actual needs.

[0059] According to some embodiments of the present invention, the rotation direction of the guide groove 1121 can be set to be counterclockwise, and correspondingly, the rotation direction of the guide portion 1122 is also counterclockwise.

[0060] It is conceivable that, in other embodiments, the rotation direction of the guide groove 1121 can also be set to be clockwise, and correspondingly, the rotation direction of the guide portion 1122 is also clockwise.

[0061] Reference Figure 1 , Figure 6 According to some embodiments of the present invention, a pipe connection structure 113 is provided at one end of the main body 110, thereby facilitating the connection between the flow-increasing drainage head provided by the present invention and the pipe.

[0062] Figures 4 to 6 According to some embodiments of the present invention, the pipe connection structure 113 includes a stud 1131 and a bottom hook 1132. The stud 1131 is connected to the main body 110, and the bottom hook 1132 is screwed to the stud 1131. The bottom hook 1132 is arranged opposite to the drainage hole 111, and the bottom hook 1132 can be spirally rotated around the stud 1131 to adjust the distance between the bottom hook 1132 and the main body 110. In the specific implementation process, the bottom hook 1132 usually extends into the pipe from the interface of the pipe and is stuck at the position where the internal size of the pipe changes. By rotating the main body 110, the bottom hook 1132 rotates relative to the stud 1131, thereby driving the main body 110 to approach or move away from the interface of the pipe, thereby achieving the fixing of the drainage head to the pipe or the detachment of the drainage head from the pipe.

[0063] according to Figure 5In the direction shown, the axis of the drain hole 111 is along the up and down direction, the drainage direction of the drain hole 111 is from top to bottom, the water inlet end of the drain hole 111 is the upper end of the drain hole 111, and the water outlet end of the drain hole 111 is the lower end of the drain hole 111. At this time, the switch mechanism 200 of the drain valve is located on the upper side of the main body 110, and the bottom hook 1132 is located on the lower side of the main body 110.

[0064] Reference Figure 3 , Figure 6 and Figure 7 According to some embodiments of the present invention, when the pipe connection structure 113 adopts the form of a bottom hook 1132, a mounting portion 130 is provided on the lower side of the main body 110, and the mounting portion 130 is connected to the main body 110 through more than two connecting arms 131, and the stud 1131 is installed on the mounting portion 130.

[0065] The pipeline connection structure 113 may also be arranged in other ways, for example, Figure 1 , Fig. 9 According to some embodiments of the present invention, the pipe connection structure 113 may include a connection thread 1133 disposed on the main body 110, and the connection thread 1133 may be an external thread or an internal thread.

[0066] Reference Fig.12 and Fig.16 The drain valve according to the second embodiment of the present invention includes the above-mentioned flow-increasing drain head. The drain valve provided by the present invention can increase the speed of drainage by adopting the above-mentioned flow-increasing drain head. Therefore, when sanitary ware adopts the drain valve provided by the present invention, the sanitary ware can be flushed with a higher speed of water flow at the moment of flushing, thereby improving the flushing effect of the sanitary ware, reducing the water flow required for flushing, and realizing water saving.

[0067] Reference Fig.12 and Fig.18According to some embodiments of the present invention, the above-mentioned drain valve also includes a switch mechanism 200, which is located on one side of the main body 110 and is connected to the main body 110. The switch mechanism 200 has a cover 210, and the cover 210 can move away from or close to the drain hole 111 to open or close the drain hole 111. A second guide structure 220 is provided on the side of the cover 210 facing the main body 110. The second guide structure 220 is used to cooperate with the first guide structure 112 to drive the water flow entering the drain hole 111 to rotate. Therefore, after the drain valve is installed on the water tank, when the cover 210 of the switch mechanism 200 is away from the drain hole 111 to open the drain hole 111, the water in the water tank flows into the upper end of the drain hole 111. During this process, the first guide structure 112 drives the water flow between the cover 210 and the drain hole 111 to rotate from the bottom, and the second guide structure 220 drives the water flow between the cover 210 and the drain hole 111 to rotate in the same direction from the top, thereby improving the vortex effect and further improving the drainage speed.

[0068] Reference Fig.14 , Fig.15 and Fig.18 In some embodiments, the second guide structure 220 includes a conical guide wheel, and spirally extending guide blades 221 are arranged on the periphery of the guide wheel. The guide wheel can be fixedly installed on the cover 210 or rotatably installed on the cover 210. During the production process, the guide wheel and the cover 210 can be formed separately.

[0069] In other embodiments, the second guide structure 220 may also include a plurality of guide vanes 221 arranged in a spiral shape. The guide vanes 221 are protrudingly disposed on a side of the cover 210 facing the drainage hole 111. During the production process, the guide vanes 221 and the cover 210 may be integrally formed.

[0070] In the specific implementation process, the above-mentioned drain valve can be configured as a cylindrical drain valve 01 or a floating drain valve 02.

[0071] In the specific implementation process, refer to Fig.15 The cover 210 of the cylindrical drain valve 01 may be provided with the second flow guiding structure 220 described above; Fig.18 The cover 210 of the floating drain valve 02 may also be provided with the above-mentioned second flow guiding structure 220.

[0072] Reference Figures 12 to 15In the cylinder type drain valve 01, the switch mechanism 200 includes an outer cylinder 230, an operating part 240 and a transmission assembly 250. The outer cylinder 230 is located on one side of the main body 110 and is fixedly connected to the main body 110. A water inlet 122 connected to the drain hole 111 is provided between the outer cylinder 230 and the main body 110. The cover 210 is slidably installed in one end of the outer cylinder 230 close to the main body 110. The operating part 240 is installed at one end of the outer cylinder 230 away from the main body 110. The transmission assembly 250 is installed in the outer cylinder 230. The operating part 240 is in transmission connection with the transmission assembly 250, and the transmission assembly 250 is in transmission connection with the cover 210. When the operating part 240 moves, the operating part 240 drives the cover 210 to slide close to or away from the drain hole 111 through the transmission assembly 250 to close or open the drain hole 111. When the cover 210 moves away from the drain hole 111 to open the drain hole 111, the water inlet 122 is connected with the drain hole 111, thereby, the water outside the drain valve can first pass through the water inlet 122 and then enter the drain hole 111.

[0073] In the cylinder-type drain valve 01, the operating part 240 can be configured in a button form or a knob form. Specifically, when the operating part 240 is configured in a button form, the operating part 240 can be slidably installed on the outer cylinder 230. At this time, one, two or more operating parts 240 can be provided; when the operating part 240 is configured in a knob form, the operating part 240 is rotatably installed on the outer cylinder 230.

[0074] Reference Figure 7 , Fig.12 and Fig.15 In the cylinder type drain valve 01, a connecting portion 120 is provided between the main body 110 and the outer cylinder 230, one of the main body 110 and the outer cylinder 230 is integrally connected to the connecting portion 120, and the other is detachably connected to the connecting portion 120, a water inlet 122 is provided on the outer periphery of the connecting portion 120, and a avoidance hole 121 is provided on the connecting portion 120 along the axis of the drain hole 111, the water inlet 122 is communicated with the avoidance hole 121, the avoidance hole 121 is arranged opposite to and communicated with the drain hole 111, and a cover 210 is located in the avoidance hole 121.

[0075] Reference Figure 7 , Fig.12 , Fig.14In the cylinder type drain valve 01, when the main body 110 is integrally connected with the connecting part 120, one end of the outer cylinder 230 is rotatably plugged and connected with the connecting part 120. One of the connecting part 120 and the outer cylinder 230 is provided with a plurality of card slots 123, and the other is provided with a card portion 231. The plurality of card slots 123 are distributed in a circle around the axis of the drain hole 111. The connecting part 120 is elastic, and the card portion 231 can be clamped in any card slot 123. Thus, the outer cylinder 230 can be rotated to adjust the installation angle of the entire switch mechanism 200 relative to the flow-increasing drainage head. In the process of rotating the outer cylinder 230, due to the elasticity of the connecting part 120, the card portion 231 can be moved and switched from one of the card slots 123 to other card slots 123, and a sound is emitted during the movement of the card portion 231 to prompt the rotation of the outer cylinder 230.

[0076] Reference Figures 16 to 18 In the float-type drain valve 02, the switch mechanism 200 includes a rotating arm 260, a cover 210 is connected to one end of the rotating arm 260, and the other end of the rotating arm 260 is rotatably connected to the main body 110, wherein the density of the cover 210 is less than that of water, or the cover 210 is provided with a buoyancy portion 211 having a density less than that of water. Therefore, after the float-type drain valve 02 is applied to sanitary ware, when water soaks the cover 210 or the buoyancy portion 211, the cover 210 or the buoyancy portion 211 generates buoyancy, and then the buoyancy drives the cover 210 to rotate away from the drain hole 111 to open the drain hole 111, thereby draining the water around the cover 210. During the drainage process, the cover 210 will rotate again close to the drain hole 111 under the action of gravity, thereby, after the water around the cover 210 is drained, the cover 210 re-closes the drain hole 111.

[0077] It should be noted that the switch structure of the above-mentioned drain valve can also be arranged in other ways. For example, the switch structure also includes a shell, a pressing piece and a magnet. The shell is connected to the main body 110. An avoidance hole 121 connected to the drain hole 111 is arranged between the shell and the main body 110. The cover 210 is installed in the shell and can slide along the axis of the drain hole 111. The pressing piece is installed in the shell and can slide along the axis of the drain hole 111. The magnet is slidably installed in the shell and connected to the pressing piece. The cover 210 has magnetism or the cover 210 is provided with a magnetic part to generate suction between the cover 210 and the magnet. A reset piece is provided between the pressing piece and the shell. When the user presses the pressing piece, the pressing piece slides toward the main body 110. At this time, the magnet approaches the cover 210, so that the suction force between the magnet and the cover 210 increases, and the cover 210 slides away from the drain hole 111, thereby opening the drain hole 111. After the user releases the pressing piece, the pressing piece moves and resets under the action of the reset piece, so that the magnet moves away from the cover 210, and the suction force between the magnet and the cover 210 decreases, so that the cover 210 slides close to the drain hole 111 under the action of its own gravity to re-close the drain hole 111. Of course, the cover 210 can also slide close to the drain hole 111 under the action of a spring or other reset structure to re-close the drain hole 111.

[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A flow-increasing drainage head, characterized in that: include: A main body (110) is provided with a drainage hole (111), a first flow guiding structure (112) is provided in the drainage hole (111), the first flow guiding structure (112) comprises a plurality of flow guiding grooves (1121) spaced apart around the axis of the drainage hole (111), the flow guiding grooves (1121) are used to drive water passing through the flow guiding grooves (1121) to generate a rotational downward motion to increase the water flow velocity.

2. The flow-increasing drainage head according to claim 1, characterized in that: The guide grooves (1121) are arranged in a spiral shape.

3. The flow-increasing drainage head according to claim 2, characterized in that: The guide groove (1121) is recessed on the inner wall of the drainage hole (111), and the groove wall between two adjacent guide grooves (1121) forms a guide portion (1122); or, The first flow guiding structure (112) comprises a plurality of spirally arranged flow guiding ribs (1123), wherein the flow guiding ribs (1123) are arranged on the inner wall of the drainage hole (111), and the flow guiding groove (1121) is formed by enclosing two corresponding adjacent flow guiding ribs (1123) and the inner wall of the drainage hole (111).

4. The flow-increasing drainage head according to claim 2, characterized in that: The distance between the bottom wall of the guide groove (1121) and the axis of the drainage hole (111) gradually decreases along the drainage direction of the drainage hole (111).

5. The flow-increasing drainage head according to claim 2, characterized in that: The direction of rotation of the guide groove (1121) is counterclockwise or clockwise.

6. The flow-increasing drainage head according to claim 1, characterized in that: The outer diameter of one end of the main body (110) is 2 inches or 3 inches.

7. The flow-increasing drainage head according to any one of claims 1 to 6, characterized in that: One end of the main body (110) is provided with a pipeline connection structure (113).

8. The flow-increasing drainage head according to claim 7, characterized in that: The pipe connection structure (113) comprises a stud (1131) and a bottom hook (1132), wherein the stud (1131) is connected to the main body (110), the bottom hook (1132) is screwed to the stud (1131), and the bottom hook (1132) is arranged opposite to the drainage hole (111); and / or, The pipeline connection structure (113) comprises a connection thread (1133) arranged on the main body (110).

9. The flow-increasing drainage head according to claim 1, characterized in that: It can be applied to a cylinder-type drain valve (01) or a float-type drain valve (02).

10. A drain valve, characterized in that: It comprises the flow-increasing drainage head as described in any one of claims 1 to 9.

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