CN221145414U - Water channel plug, water channel main body and shower - Google Patents

Abstract

The utility model discloses a water channel plug, a water channel main body and a shower. In the water channel plug, the shell is suitable for being fixedly connected with a pipeline structure with a water channel along the axial direction, and is provided with a first channel and a second channel which are communicated with each other along the axial direction; the first channel is used for communicating with the water channel; the second channel has a drain adapted to be located outside the waterway; the elastic piece is arranged in the shell, is axially arranged, and one end of the elastic piece is abutted against the shell; the piston is arranged in the shell in a sliding way and is abutted against the other end of the elastic piece, is suitable for blocking the first channel based on the elastic force of the elastic piece when the water channel pressure is lower than the first pressure, and is also suitable for overcoming the elastic force of the elastic piece to open the first channel and enabling the first channel to be communicated with the second channel when the water channel pressure is higher than the first pressure. The water channel main body comprises a water channel main body and a water channel plug; the water channel body is provided with a water channel with an open end. The shower uses a waterway body. According to the technical scheme, the water channel main body can be prevented from cracking due to the increase of internal pressure in the use process.

Description

Water channel plug, water channel main body and shower

Technical Field

The utility model relates to the technical field of bathroom accessories, in particular to a water channel plug, a water channel main body and a shower.

Background

The pressure-bearing capacity of the water channel main body made of plastic is limited, and when the water channel is frozen, the pressure in the water channel is increased, so that the water channel main body is easy to crack. In the prior art, a water channel main body made of plastic has no protective structure, and once high pressure occurs, the water channel main body can crack and cause water leakage due to pressure accumulation, so that the problems of use risk and difficult maintenance exist.

Disclosure of utility model

The utility model aims to overcome the defects or problems in the prior art and provide a water channel plug, a water channel main body and a shower, which can help pressure release when the pressure in the water channel is increased and prevent the water channel main body made of plastic from cracking in the use process.

To achieve the above object, the present utility model and its preferred embodiments adopt the following technical solutions but the embodiments are not limited to the following solutions:

a waterway plug, comprising: a housing adapted to be axially secured to a pipe structure having a waterway, the housing having a first passageway and a second passageway in axial communication with each other; the first channel is used for communicating with a water channel; the second channel has a drain opening; the drain opening is positioned outside of the waterway when the housing is in place with the plumbing structure having the waterway; an elastic piece which is arranged in the shell, is axially arranged, and one end of the elastic piece is abutted against the shell; the piston is axially arranged in the shell in a sliding manner and is abutted against the other end of the elastic piece, is suitable for blocking the first channel based on the elastic force of the elastic piece when the water channel pressure is lower than the first pressure, and is also suitable for overcoming the elastic force of the elastic piece to open the first channel and enable the first channel to be communicated with the second channel when the water channel pressure is higher than the first pressure.

As a preferred embodiment, the piston is adapted to rest in the first position when the waterway pressure is lower than the second pressure; the second pressure is less than the first pressure; the first position is spaced a preset first distance from a position where the piston opens the first channel and the second channel.

As a preferred embodiment, an abutting surface which is arranged along the axial direction and away from the water channel is arranged in the first channel; in the first position, the piston abuts against the abutment surface, and the elastic member presses against the piston with the second pressure.

As a preferred embodiment, the housing is adapted to establish a fixed relationship with a pipe structure having the waterway by screwing.

As a preferred embodiment, the housing includes a shell and an outer cover; one end of the shell along the axial direction is suitable for being plugged in the water channel and screwed with the water channel, and is provided with a first hole and a mounting cavity which are arranged along the axial direction and communicated with each other; the first hole constitutes the first passage; the side wall of the mounting cavity is provided with the water outlet; the outer cover is inserted into the mounting cavity and is in threaded connection with the side wall of the mounting cavity, and a second hole is formed in the outer cover along the axial direction; the second hole is used for installing the piston and the elastic piece; the end face of the outer cover, which is positioned in the mounting cavity, is spaced from the end wall of the mounting cavity to form the second channel.

As a preferred embodiment, the hole wall at the end of the first hole connected with the mounting cavity is formed with an inner chamfer.

As a preferred embodiment, the housing outer wall is formed with at least one pair of first non-rotating surfaces radially opposed to each other. An operation hole is formed in the end face, away from the shell, of the outer cover; the wall of the operating hole is formed with at least one pair of second non-rotating surfaces which are opposite to each other in the radial direction.

As a preferred embodiment, the piston comprises a piston rod and a seal; the piston rod extends along the axial direction and is inserted between the first hole and the second hole, and an annular flange is formed on the outer wall of one end of the piston rod, which faces the first hole; the sealing piece is fixedly sleeved on the outer wall of the annular flange and is suitable for being in sealing contact with or separated from the hole wall of the first hole.

A waterway body comprising a waterway body and a waterway plug as described above; the waterway body forms a conduit structure having the waterway with an open end.

A shower includes a shower housing and a waterway body mounted within the shower housing.

As can be seen from the above description of the present utility model and the preferred embodiments thereof, compared with the prior art, the technical solution of the present utility model and the preferred embodiments thereof have the following beneficial effects due to the following technical means:

1. In the related technical scheme and the preferred embodiment thereof, two ends of the piston along the axial direction are respectively acted by the elastic piece and the water pressure in the water channel; when the water channel pressure is lower than the first pressure, the piston is blocked in the first channel under the action of the elastic force of the elastic piece, and at the moment, the first channel and the second channel are not communicated, so that the water channel is in a sealed state at the water channel plug, the water flow in the water channel can normally circulate, and the first pressure can be specifically set by referring to the pressure value in the water channel under the condition of high pressure or icing; when the water channel pressure is higher than the first pressure, the water channel pressure is higher than the elastic force of the elastic piece, the piston moves against the elastic force of the elastic piece under the action of the water channel pressure, and the first channel is communicated with the second channel, at the moment, water in the water channel can flow into the second channel from the first channel and is discharged from the water outlet, the pressure in the water channel is reduced, and therefore the plastic water channel is prevented from cracking, hidden danger of water leakage is avoided, and maintenance difficulty is avoided.

2. In the related technical scheme and the preferred embodiment thereof, the piston is suitable for stopping at a first position when the water channel pressure is lower than the second pressure, and the first position is spaced from the position where the piston opens the first channel and the second channel to be communicated by a preset first distance, so that the piston can slide for a certain distance in a direction away from the water channel under the condition that the internal pressure of the water channel is higher than the second pressure but lower than the first pressure, and a pressure release space is provided, so that the plastic water channel can not be reduced in performance due to repeated bearing of low pressure, and the service life of the plastic water channel is further ensured.

3. In a related technical solution and a preferred embodiment thereof, an abutment surface is disposed in the first channel; when the piston is in the first position, the piston is abutted with the abutting surface under the abutting of the elastic piece, so that the elastic piece can provide certain pretightening force for the piston, the piston can bear proper water pressure, and good stability of the piston under the condition that the water channel is normally used is ensured.

4. In the related technical scheme and the preferred embodiment thereof, the shell is fixedly connected with the pipeline structure with the water channel through the screw connection, and the connecting structure is simple and convenient to assemble and disassemble.

5. In related technical scheme and preferred embodiment thereof, the shell includes casing and enclosing cover, and casing and water course spiro union, and the part of enclosing cover inserts with the installation cavity and establishes and spiro union, and this detachably structural style can make things convenient for piston and elastic component installation to can convenient production.

6. In the related technical scheme and the preferred embodiment thereof, an inner chamfer is formed on the hole wall of one end of the first hole connected with the mounting cavity in the shell, and the arrangement of the inner chamfer is beneficial to enlarging the port diameter of the first hole, so that the piston can conveniently enter the first hole.

7. In the related technical scheme and the preferred embodiment thereof, the outer wall of the shell is formed with at least one pair of first non-rotating surfaces which are opposite to each other along the radial direction, so that the shell can be conveniently screwed by an operator through a spanner.

The outer end face of the outer cover is provided with an operation hole, and the hole wall of the operation hole is formed with at least one pair of second non-rotation surfaces which are opposite to each other along the radial direction, so that an operator can screw the outer cover by adopting a hexagonal wrench.

8. In the related technical scheme and the preferred embodiment thereof, the piston comprises a piston rod and a sealing element, the piston rod extends along the axial direction, the sealing element is fixedly sleeved outside an annular flange of the piston rod, and the piston is simple in structure and easy to produce.

9. In the related technical scheme and the preferred embodiment thereof, the water channel main body forms a pipeline structure with a water channel, and the water channel plug is used, so that the water channel main body is not easy to crack due to high pressure or icing phenomenon in the water channel in the application process, and the use requirement of people can be well met.

10. In related technical scheme and preferred embodiment thereof, shower includes shower casing and installs the water course main part in the shower casing, and it has the advantage the same with the water course main part, has the characteristics that are difficult for appearing high pressure or icing phenomenon and lead to fracture, can satisfy people's user demand well because of the water course is inside in the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the description of the embodiments below are briefly introduced, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a perspective exploded view of an embodiment of a waterway plug of the present utility model;

FIG. 2 is a schematic perspective view of a water drain plug according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a water drain plug according to an embodiment of the present utility model in a closed state;

FIG. 4 is a schematic cross-sectional view of a water plug according to an embodiment of the present utility model in an open state;

FIG. 5 is a schematic view of an exploded perspective view of an embodiment of a waterway body of the present utility model;

FIG. 6 is a schematic perspective exploded view of an embodiment of the waterway body of the present utility model;

fig. 7 is a schematic cross-sectional view of an embodiment of the waterway body of the present utility model.

The main reference numerals illustrate:

A waterway body 1; a water channel 2; a water channel plug 3; a housing 4; a first channel 5; a second channel 6; a water outlet 7; a housing 8; a first hole 9; an abutment surface 10; an inner chamfer 11; a mounting cavity 12; a first plane 13; an abutment flange 14; a seal ring 15; an outer cover 16; a second hole 17; an operation hole 18; a second plane 19; an elastic member 20; a piston 21; a piston rod 22; an annular flange 23; an annular groove 24; and a seal 25.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to be understood that the described embodiments are preferred embodiments of the utility model and should not be taken as excluding other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without creative efforts, are within the protection scope of the present utility model.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the utility model.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Water course plug 3 embodiment

Referring to fig. 1 to 4, fig. 1 to 4 each show a water drain plug 3 provided in the present embodiment. The water channel plug 3 provided in this embodiment is used for plugging an open port of the water channel 2, and includes a housing 4, an elastic member 20, and a piston 21.

The housing 4 is adapted to be axially secured to a pipe structure having a water channel 2, which is provided with a first passage 5 and a second passage 6 communicating with each other in the axial direction; the first channel 5 is used for communicating with the water channel 2; the second channel 6 has a drain opening 7; the drain opening 7 is located outside the waterway 2 when the housing is in place with the plumbing structure having the waterway 2. Specifically, the housing 4 is shown in fig. 1 and 2, and includes a case 8 and an outer cover 16.

The shell 8 is suitable for establishing a fixedly connected relation with a pipeline structure with the water channel 2 through screw connection, and has simple connection structure and convenient disassembly and assembly. As shown in fig. 1 to 3, the casing 4 is generally cylindrical, one end of the casing 4 along the axial direction is suitable for plugging the water channel 2 and being screwed with the inner wall of the water channel 2, that is, the outer wall of one end of the casing 8 along the axial direction is provided with external threads to be screwed with the inner wall of the water channel 2, it should be understood that the water channel plug 3 should ensure that the water channel 2 has good sealing performance after plugging the water channel 2, therefore, in this embodiment, the fixing between the casing 8 and the pipeline structure with the water channel 2 should also ensure that the matching between the casing 8 and the pipeline structure with the water channel 2 has sealing performance, in a specific embodiment, a sealing ring 15 is sleeved on a part of the outer wall of the casing 8 for being screwed with the inner wall of the water channel 2, and the sealing ring 15 is in sealing fit with the inner wall of the water channel 2 after the casing 8 and the inner wall of the water channel 2 are screwed in place, so as to achieve sealing effect; furthermore, in the present embodiment, the housing 8 is also provided with an abutment flange 14 at its outer wall, which abutment flange 14 serves both to limit the position of the sealing ring 15 and to abut against the end face of the pipe structure having the water channel 2, thereby defining the screw depth of the housing 8 to the inner wall of the water channel 2. The shell 8 is provided with a first hole 9 and a mounting cavity 12 which are axially arranged and communicated with each other, the first hole 9 forms a first channel 5, an abutting surface 10 which is axially arranged away from the water channel 2 is arranged in the first channel 5, and the abutting surface 10 is used for abutting the piston 21; the hole wall of one end of the first hole 9 connected with the mounting cavity 12 is formed with an inner chamfer 11, and the arrangement of the inner chamfer 11 can enlarge the port diameter of the first hole 9, so that the piston 21 can conveniently enter the first hole 9, and in the embodiment, the inner chamfer 11 is an arc chamfer; the mounting chamber 12 is adapted for mounting of the cover 16 and is provided with a drain opening 7 in its side wall constituting the outlet end of the second channel 6. The outer wall of the casing 8 is formed with at least one pair of first non-rotating surfaces which are opposite to each other in the radial direction, and the first non-rotating surfaces can be abutted by an external tool, so that an operator can conveniently screw the casing 8 by using the tool to conveniently realize the disassembly and assembly between the casing 8 and the pipeline structure with the water channel 2, specifically, in the embodiment provided by the embodiment, the outer wall of the casing 8 is formed with six first planes 13 which are sequentially connected in the circumferential direction, and each first plane 13 forms the first non-rotating surface.

The outer cover 16 is inserted into the mounting cavity 12 and is in threaded connection with the side wall of the mounting cavity 12, and is provided with a second hole 17 arranged along the axial direction, wherein the second hole 17 is used for mounting the piston 21 and the elastic piece 20; the end face of the cover 16 within the mounting cavity 12 is spaced from the end wall of the mounting cavity 12 to form the second passageway 6. As shown in fig. 1 to 3, the outer cover 16 is generally cylindrical, a part of the outer cover 16 along the axial direction is inserted into the mounting cavity 12 and is in threaded connection with the mounting cavity 12, a second hole 17 and an operation hole 18 which are communicated along the axial direction are formed in the center of the outer cover 16, the second hole 17 is close to the first hole 9, the operation hole 18 is positioned on the end face of the outer cover 16 far away from the shell 8, the hole wall of the outer cover is formed with at least one pair of second non-rotation faces which are opposite to each other along the radial direction so as to be abutted by an external tool, thus the outer cover 16 can be conveniently screwed by an operator through the tool, in the embodiment, the operation hole 18 is provided with six second planes 19 which are sequentially connected along the circumferential direction, and the arrangement of the second planes 19 is similar to the first plane 13, and the second non-rotation faces are formed and can be conveniently screwed by the operator through a corresponding wrench, so that the outer cover 16 and the shell 8 can be conveniently disassembled and assembled. The case 4 is designed as the detachable case 8 and the outer cover 16, so that the piston 21 and the elastic member 20 can be conveniently mounted, thereby being convenient for production.

The elastic piece 20 is arranged along the axial direction, one end of the elastic piece along the axial direction is abutted against the shell 4, the other end of the elastic piece is used for being abutted against the piston 21, so that acting force towards the water channel 2 is applied to the piston 21, the first hole 9 can be plugged by the piston 21 under the normal use condition, and the water flow of the water channel 2 can be ensured to normally circulate. In the present embodiment, the elastic member 20 is, but not limited to, a spring, which has a simple structure, is easy to obtain, and has low cost.

The piston 21 is shown in fig. 1, 3 and 4, and comprises a piston rod 22 and a sealing member 25, wherein the piston rod 22 extends along the axial direction and is arranged between the first hole 9 and the second hole 17 in a sliding manner, an annular flange 23 is formed on the outer wall of one end of the piston rod facing the first hole 9, and an annular groove 24 is formed on the outer wall of the annular flange 23; the piston rod 22 is located in the second hole 17, a gap is formed between the outer wall and the wall of the second hole 17, and the elastic member 20 is sleeved on the periphery of the piston rod 22 and is located in the gap. The sealing element 25 is, but not limited to, an O-ring, which is sleeved in the annular groove 24, i.e. the sealing element 25 is fixedly sleeved on the outer wall of the annular flange 23, and is suitable for respectively realizing the disconnection and opening of the communication between the first channel 5 and the second channel 6 by sealing against or separating from the wall of the first hole 9. The piston 21 is designed to be composed of the piston rod 22 and the sealing member 25, so that the forming difficulty of the piston 21 can be reduced, and the production is convenient.

In this embodiment, the piston 21 is slidably disposed in the housing 4 along the axial direction and abuts against the other end of the elastic member 20, and is adapted to block the first channel 5 based on the elastic force of the elastic member 20 when the pressure of the water channel 2 is lower than the first pressure, at this time, the first channel 5 and the second channel 6 are not communicated, so that the water channel 2 is in a sealed state at the water channel plug 3, the water flow in the water channel 2 can normally circulate, and the first pressure can be specifically set with reference to the pressure value in the water channel 2 under the condition of high pressure or icing, for example, the first pressure can be set to 4MPa; the piston 21 is further adapted to overcome the elastic force of the elastic member 20 to open the first channel 5 and enable the first channel 5 to communicate with the second channel 6 when the pressure of the water channel 2 reaches the first pressure or higher, at this time, water in the water channel 2 can flow into the second channel 6 from the first channel 5 and be discharged from the water outlet 7, so as to reduce the pressure in the water channel 2, thereby preventing the plastic water channel 2 from cracking, avoiding hidden danger of water leakage and causing difficult maintenance. Furthermore, the piston 21 is adapted to rest in the first position when the pressure in the flume 2 is lower than the second pressure; the second pressure is smaller than the first pressure, and can be set according to the internal pressure value of the water channel 2 under the normal use condition, for example, the second pressure can be set to be 2.7MPa; the first position and the position where the piston 21 opens the first channel 5 and the second channel 6 are spaced by a preset first distance, so that the piston 21 can slide for a certain distance in a direction away from the water channel 2 under the condition that the internal pressure of the water channel 2 is larger than the second pressure but smaller than the first pressure, and a pressure release space is provided, so that the plastic water channel 2 is ensured not to be reduced in performance due to repeated bearing of low pressure, and the service life of the plastic water channel 2 is further ensured. In this embodiment, when in the first position, the piston 21 abuts against the abutment surface 10, the elastic member 20 applies an elastic force value equal to the second pressure to the piston 21, and in this state, the elastic member 20 can provide a certain pretightening force to the piston 21, so that the piston 21 can bear a proper hydraulic pressure, and the elastic member 20 is ensured not to reciprocate under the condition that the waterway 2 is normally used, so that the piston 21 is ensured to have good stability.

Water course body embodiments

Referring to fig. 5 to 7, fig. 5 to 7 each show a waterway body provided by the present embodiment. The water channel main body provided by the embodiment comprises a water channel main body 1 and a water channel plug 3. The water channel body is provided with a water channel 2 with an open end; the water channel plug 3 is adapted to be sealingly secured to the end of the water channel 2. The water channel main body is not easy to crack due to high pressure or icing phenomenon in the water channel 2 in the application process due to the water channel plug 3, and can well meet the use requirements of people.

The installation principle of the water channel main body provided by the embodiment is as follows:

The sealing element 25 is sleeved in the annular groove 24 on the outer wall of the piston rod 22; the elastic piece 20 is sleeved outside the piston rod 22 and is abutted against the annular flange 23; inserting the assembled piston 21 from the side of the mounting chamber 12 of the housing 8 with the annular flange 23 and the seal 25 partially into the first bore 9; the appearance is placed in and screwed with the mounting cavity 12 by using a hexagonal wrench; the sealing ring 15 is sleeved on the outer wall of the shell 8; finally, the shell 8 is inserted into the water channel 2 and is screwed in place with the water channel 2, and then the installation is completed.

When the water pump is used, if the water pressure in the water channel 2 is normal (the pressure is 0-2.7 MPa), the piston 21 is used for blocking the first channel 5 based on the elastic force of the elastic piece 20, and at the moment, the first channel 5 and the second channel 6 are not communicated, so that the water channel 2 is in a sealing state at the water channel plug 3; if the water pressure in the water channel 2 increases but is greater than the second pressure but less than the first pressure (the pressure is 2.7-4 MPa), the piston 21 slides a certain distance away from the water channel 2 but is not separated from the first channel 5 under the action of the pressure in the water channel 2, and at this time, the piston 21 provides a certain pressure relief space, but the first channel 5 is still not communicated with the second channel 6, and the water channel 2 is in a sealed state at the water channel plug 3; if high pressure or icing (the pressure is more than or equal to 4 MPa) exists in the water channel 2, the piston 21 overcomes the elastic force of the elastic piece 20 and moves to the direction away from the water channel 2 until the sealing piece 25 exits the first hole 9, so that the first channel 5 and the second channel 6 are communicated, water in the water channel 2 can be discharged through the first channel 5 and the second channel 6, the water channel 2 is depressurized, and the high pressure is relieved, so that the water channel body 1 can be prevented from being broken.

Shower embodiments

The shower includes a shower housing (not shown) and a waterway body mounted within the shower housing. The shower has the same advantages as the water channel main body, and has the characteristics that cracking is not easy to occur due to high pressure or icing phenomenon in the water channel in the application process, and the use requirements of people can be well met.

The foregoing description of the embodiments and description is presented to illustrate the scope of the utility model, but is not to be construed as limiting the scope of the utility model. Modifications, equivalents, and other improvements to the embodiments of the utility model or portions of the features disclosed herein, as may occur to persons skilled in the art upon use of the utility model or the teachings of the embodiments, are intended to be included within the scope of the utility model, as may be desired by persons skilled in the art from a logical analysis, reasoning, or limited testing, in combination with the common general knowledge and/or knowledge of the prior art.

Claims (10)

1. A waterway plug, comprising:

A housing (4) adapted to be axially fixed to a pipe structure having said water channel (2), provided with a first channel (5) and a second channel (6) axially communicating with each other; the first channel (5) is used for communicating with the water channel (2); the second channel (6) is provided with a water outlet (7); the drain opening (7) is located outside the waterway (2) when the housing (4) is secured in place with a conduit structure having the waterway (2);

An elastic member (20) which is installed in the housing (4), is provided in the axial direction, and has one end abutting the housing (4);

The piston (21) is axially arranged in the shell (4) in a sliding manner and is abutted against the other end of the elastic piece (20), is suitable for blocking the first channel (5) based on the elastic force action of the elastic piece (20) when the pressure of the water channel (2) is lower than the first pressure, and is also suitable for overcoming the elastic force of the elastic piece (20) to open the first channel (5) and enabling the first channel (5) to be communicated with the second channel (6) when the pressure of the water channel (2) is higher than the first pressure.

2. A waterway plug according to claim 1, characterized in that the piston (21) is adapted to rest in the first position when the waterway (2) pressure is lower than the second pressure; the second pressure is less than the first pressure; the first position is spaced apart from a position where the piston (21) opens the first passage (5) and the second passage (6) by a preset first distance.

3. A waterway plug according to claim 2, characterized in that the first channel (5) is provided with an abutment surface (10) arranged axially facing away from the waterway (2); in the first position, the piston (21) abuts the abutment surface (10), and the elastic member (20) presses against the piston (21) with the second pressure.

4. A waterway plug according to claim 2, characterized in that the housing (4) is adapted to establish a fixed relationship with the pipe structure having the waterway (2) by bolting.

5. A waterway plug according to claim 3, characterized in that the casing (4) comprises a shell (8) and an outer cover (16); one end of the shell (8) along the axial direction is suitable for being plugged in the water channel (2) and is in threaded connection with the water channel (2), and the shell is provided with a first hole (9) and a mounting cavity (12) which are arranged along the axial direction and are communicated with each other; -said first hole (9) constitutes said first channel (5);

The side wall of the mounting cavity (12) is provided with the water outlet (7);

The outer cover (16) is inserted into the mounting cavity (12) and is in threaded connection with the side wall of the mounting cavity (12), and is provided with a second hole (17) arranged along the axial direction; -said second hole (17) for mounting said piston (21) and said elastic member (20); the end surface of the outer cover (16) positioned in the mounting cavity (12) is separated from the end wall of the mounting cavity (12) to form the second channel (6).

6. A water drain plug according to claim 5, wherein the wall of the end of the first bore (9) that is contiguous with the mounting cavity (12) is formed with an internal chamfer (11).

7. The waterway plug according to claim 5, characterized in that the outer wall of the casing (8) is formed with at least one pair of first non-rotating surfaces radially opposite each other;

An operation hole (18) is formed in the end face, far away from the shell (8), of the outer cover (16); the walls of the operating orifice (18) are formed with at least one pair of second non-rotating surfaces radially opposite each other.

8. A waterway plug according to claim 5, characterized in that the piston (21) comprises a piston rod (22) and a seal (25); the piston rod (22) extends along the axial direction and is inserted between the first hole (9) and the second hole (17), and an annular flange (23) is formed on the outer wall of one end of the piston rod, which faces the first hole (9); the sealing element (25) is fixedly sleeved on the outer wall of the annular flange (23) and is suitable for being in sealing contact with or separated from the wall of the first hole (9).

9. A waterway body, characterized by comprising a waterway body (1) and a waterway plug (3) of any of claims 1 to 8; the water channel body (1) forms a pipeline structure, and is provided with the water channel (2) with an open end.

10. A shower including a shower housing and a waterway body as claimed in claim 9 mounted within the shower housing.