Sealing structure between water pipe and waterproof coating

Abstract

The utility model discloses a sealing structure between a water pipe and a waterproof coating, which relates to the technical field of indoor decoration water pipe connection, and comprises a hot water pipeline body, a connecting water pipeline body and a double-end quick-connection waterproof connecting piece, and the outer side wall of one end of the bottom of the hot water pipeline body is connected to the inner side wall of the top execution end of the double-end quick-connection waterproof connecting piece. The outer side wall of one end of the bottom of the hot water pipeline body is arranged on the outer side wall of one end of the top of the connecting water pipeline body, and the outer side wall of one end of the top of the connecting water pipeline body is arranged on the outer side wall of one end of the bottom of the hot water pipeline body. According to the double-end quick-connection waterproof connecting piece, two sets of water pipes needing to be connected can be conveniently and quickly disassembled and assembled, corresponding nuts do not need to be arranged for fixedly connecting the water pipes, the installation efficiency and flexibility are improved, the water pipes are not prone to deformation to form gaps under the action of water temperature, and water leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to indoor decoration water pipe connection technical field, concretely is airtight structure between water pipe and waterproof coating. BACKGROUND

[0002] The traditional airtight structure between water pipe and waterproof coating exposes many deficiencies in actual use, the sealing tape is simple to operate, but after long -term use, easy to appear wear and tear, fall off phenomenon, difficult to maintain lasting waterproof effect, and most of the nut fixed water pipe can not be quickly disassembled and installed to two groups of water pipes needing to be connected, because the one end of the nut needs to be fixed with the water pipe, the connection is limited, and the nut fixed water pipe needs to be made corresponding size nut fixing piece, and the installation efficiency is low and the flexibility is insufficient, and the indoor decoration commonly used water pipe material is PPR water pipe, when the water pipe is used as a hot water pipe, when conveying hot water, the water pipe expands and becomes thick under the action of water temperature, and when not conveying hot water, the water pipe cools and shrinks and becomes thin. In the process of thickening and thinning, deformation gap appears, resulting in the phenomenon of water leakage.

[0003] For example, the prior art application number CN219177123U provides a waterproof pipe structure, which comprises a waterproof sealing box, a connecting assembly and a pipe, the connecting assembly is installed outside the waterproof sealing box, the pipe is installed at one end of the connecting assembly away from the waterproof sealing box, the connecting assembly comprises a fixed frame, a connecting pipe one, a connector, a connecting pipe two, a connecting column, a protruding pipe, a nut, an inner pipe, a groove and a connecting pipe three. The protruding pipe is inserted into the inner pipe, thereby completing the preliminary connection between the waterproof pipe and the waterproof sealing box, then the operator rotates the nut, so that the nut moves under the action of the thread, until the half position of the nut moves to the outer wall of the connecting column, thereby completely completing the connection between the waterproof pipe and the waterproof sealing box, and because the protrusions are clamped with the grooves and fixed by the nut, the sealing effect between the waterproof sealing box and the waterproof pipe is improved, thereby avoiding the water seepage.

[0004] The above prior art is known through actual use, which mainly fixes the nut, and the sealing effect between the waterproof sealing box and the waterproof pipe is improved; but it is found in use that the nut fixed water pipe cannot quickly disassemble and install two groups of water pipes needing to be connected, because the one end of the nut needs to be fixed with the water pipe, the connection is limited, and the nut fixed water pipe needs to be made corresponding size nut fixing piece, the installation efficiency is low and the flexibility is insufficient, and the water pipe is easy to deform under the action of water temperature, therefore, according to the actual use, the above prior art is improved. UTILITY MODEL CONTENTS

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract and the title of this utility model. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0006] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A sealed structure between a water pipe and a waterproof coating includes a hot water pipe body, a connecting water pipe body, and a double-ended quick-connect waterproof connector.

[0009] The outer wall of one bottom end of the hot water pipe body is connected to the inner wall of the top execution end of the double-ended quick-connect waterproof connector, and the outer wall of one bottom end of the hot water pipe body is set at the outer wall of one top end of the connecting water pipe body.

[0010] The outer wall of the top end of the connecting water pipe body is connected to the inner wall of the bottom execution end of the double-ended quick-connect waterproof connector, and the outer wall of the top end of the connecting water pipe body is set on the outer wall of the bottom end of the hot water pipe body.

[0011] Furthermore: the double-ended quick-connect waterproof connector includes a waterproof sealing rubber ring provided on the outer wall of both the hot water pipe body and the connecting water pipe body. One end of the outer wall of the waterproof sealing rubber ring is provided with a first limiting member, and the other end of the outer wall of the waterproof sealing rubber ring is adjacent to the first limiting member and is provided with a second limiting member with the same structure as the first limiting member. The outer wall of the first limiting member is provided with a first sliding member, and the outer wall of the second limiting member is provided with a second sliding member with the same structure as the first sliding member.

[0012] Furthermore, the second limiting component includes a hollow sleeve disposed adjacent to the first limiting component at one end of the outer wall of the waterproof sealing rubber ring. Two sets of identical square movable grooves are symmetrically opened in the inner cavity of one side of the hollow sleeve. A pressure plate is slidably connected to the bottom side wall of each of the two sets of square movable grooves. Two sets of identical sliding grooves are symmetrically opened on both outer walls of the hollow sleeve. One bottom end of each pressure plate extends to the inner wall of the hollow sleeve. Two sets of identical springs are symmetrically arranged at the bottom of one outer wall of each pressure plate. One bottom end of each spring is located on the inner wall of the square movable groove. One side of the pressure plate is slidably connected to the other bottom side wall of the square movable groove. A rubber friction pad is provided on the outer wall of each pressure plate. A polyurethane waterproof coating is provided on the inner wall of the other end of the hollow sleeve.

[0013] Further, the second sliding member comprises symmetrically slidingly connected sliding blocks provided with hollow round surface sleeves, and the hollow round surface sleeves are provided with square grooves adjacent to one side of the sliding blocks.

[0014] Further, the hollow sleeve comprises a threaded groove provided on the outer side wall of the other end, and a matching threaded cap is threadedly connected to the outer side wall of the threaded groove.

[0015] Further, the sliding blocks and the pressing plate blocks are provided with arc surfaces on one side of the outer walls.

[0016] Further, the connecting water pipe body and the hot water pipe body are provided with rubber gaskets on the inner cavity side walls.

[0017] Compared with the prior art, the utility model discloses have the beneficial effect that: the utility model discloses through the double -end quick -action waterproof connecting piece convenient can two groups need to connect the water pipe of quick detachable installation, need not set up corresponding nut and fix the water pipe, improve installation efficiency and flexibility, and the water pipe is not easy to produce deformation under the action of water temperature and form the gap, avoid the water leakage, wherein, the user manually connects one end of connecting water pipe body and hot water pipe body and is docked in two groups hollow sleeve inner chamber, again is docked in waterproof sealing rubber ring inner chamber, and first limit piece, second limit piece are same structure, and first sliding piece second sliding piece are same structure, and the operation mode is same, and the user manually makes hollow round surface sleeve pipe drive two groups of sliders in the sliding groove inner wall execution side of two groups of hollow sleeve two sides outer walls all symmetrically opened two groups of same structure and slide to the one side of pressing plate piece, when two groups of sliders drive through the sliding of hollow round surface sleeve pipe in two groups of square movable groove inner chamber, the arc surface that two groups of slider outer wall one side all sets up is pressed to the arc surface that two groups of pressing plate piece outer wall one side all sets up is supported through the spring that one side outer wall bottom all symmetrically sets up two groups of same structure in the other side wall of square movable groove inner chamber one side sliding connection and moves downward, and simultaneously support downwardly, two groups of pressing plate piece in the square movable groove inner chamber bottom side wall that all sliding connection has and move downward, make two groups of pressing plate piece outer side wall all set up rubber friction piece and connect water pipe body and hot water pipe body outer side wall, improve certain friction force through rubber friction piece, avoid loose, again through the screw groove outer side wall screw thread connection has the matching screw cap and manually rotates to the one side outer wall of hollow round surface sleeve pipe and fixes, make two groups of sliders always press in two groups of pressing plate piece, two groups of pressing plate piece outer side wall all set up rubber friction piece and connect water pipe body and hot water pipe body outer side wall, avoid loose, and through the above structure operation, connect water pipe body and hot water pipe body, convenient for two groups need to connect the water pipe of quick detachable installation, need not set up corresponding nut and fix the water pipe, improve installation efficiency and flexibility, and through two groups of hollow sleeve another end inner chamber side wall all set up polyurethane waterproof coating and facilitate waterproof, can form a layer of tough protective film on the surface of hollow sleeve another end inner chamber side wall, not only good waterproof performance, but also can resist mold breeding and salt spray corrosion, and through connecting water pipe body and hot water pipe body including inner chamber side wall all set up rubber pad piece, when the water pipe is not easy to produce deformation and form the gap under the action of water temperature, through the contraction toughness of rubber pad piece itself to supplement the thermal expansion and cold shrinkage gap of hot water pipe, greatly reduce the risk of water leakage.

[0018] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and the appended drawings.

[0019] The technical solutions of the present application will be further described in detail below with reference to the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0021] Figure 1 It is a structural schematic diagram of the present application.

[0022] Figure 2 It is a structural sectional view schematic diagram of the double-head quick-connection waterproof connecting piece of the present application.

[0023] Figure 3 It is a structural sectional view schematic diagram of the second limiting piece and the second sliding piece of the present application.

[0024] Figure 4 It is a structural side view schematic diagram of the present application.

[0025] In the figure: 1, hot water pipeline body; 2, connecting water pipeline body; 21, rubber gasket; 3, double-head quick-connection waterproof connecting piece; 31, first limiting piece; 32, first sliding piece; 33, second sliding piece; 331, hollow circular surface sleeve; 332, square groove; 333, sliding block; 3331, arc surface; 34, waterproof sealing rubber ring; 35, second limiting piece; 351, hollow sleeve; 3511, threaded groove; 3512, threaded cap; 352, sliding groove; 353, pressing plate; 354, spring; 355, square movable groove; 356, rubber friction plate; 357, polyurethane waterproof coating. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0027] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0028] Second, the utility model in detail is described in combination with the schematic diagram, in order to facilitate explanation, the sectional view of the device structure will be partially enlarged without general proportion, and the schematic diagram is only an example, which should not limit the range of the utility model protection here. In addition, three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0029] Thirdly, the "one embodiment" or "embodiment" referred to herein can include specific features, structures or characteristics included in at least one implementation of the utility model. "In one embodiment" appearing in different places in the specification does not refer to the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0030] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: the sealed structure between water pipe and waterproof coating, including hot water pipeline body 1, connecting water pipeline body 2 and double-head quick-connect waterproof connecting piece 3;

[0031] The outer side wall of the bottom end of the hot water pipeline body 1 is connected to the inner side wall of the top execution end of the double-head quick-connect waterproof connecting piece 3, and the outer side wall of the bottom end of the hot water pipeline body 1 is arranged on the outer side wall of the top end of the connecting water pipeline body 2.

[0032] The outer side wall of the top end of the connecting water pipeline body 2 is connected to the inner side wall of the bottom execution end of the double-head quick-connect waterproof connecting piece 3, and the outer side wall of the top end of the connecting water pipeline body 2 is arranged on the outer side wall of the bottom end of the hot water pipeline body 1. Through the double-head quick-connect waterproof connecting piece 3, the two groups of water pipes that need to be connected can be quickly disassembled and installed, without the need to set corresponding nuts to fix the connecting water pipes, improving the installation efficiency and flexibility, and the water pipe is not easy to deform to form a gap under the action of water temperature, avoiding water leakage.

[0033] Preferably, the double-head quick-connect waterproof connecting piece 3 includes a waterproof sealing rubber ring 34 arranged on the outer side wall of one end of the hot water pipeline body 1 and the connecting water pipeline body 2, a first limiting piece 31 arranged on one end of the outer side wall of the waterproof sealing rubber ring 34, a second limiting piece 35 with the same structure as the first limiting piece 31 arranged adjacent to the first limiting piece 31 on the other end of the outer side wall of the waterproof sealing rubber ring 34, a first sliding piece 32 arranged on the outer side wall of the first limiting piece 31, and a second sliding piece 33 with the same structure as the first sliding piece 32 arranged on the outer side wall of the second limiting piece 35. The one end of the connecting water pipeline body 2 and the hot water pipeline body 1 is manually connected to the inner cavity of the two groups of hollow sleeves 351, and then connected to the inner cavity of the waterproof sealing rubber ring 34. The first limiting piece 31 and the second limiting piece 35 are of the same structure, the first sliding piece 32 and the second sliding piece 33 are of the same structure, and the operation mode is the same.

[0034] Preferably, the second limiting piece 35 comprises a hollow sleeve 351 arranged at one end of the outer wall of the waterproof sealing rubber ring 34 adjacent to the first limiting piece 31, two groups of square movable grooves 355 of the same structure are symmetrically arranged in the inner cavity of one side of the hollow sleeve 351, the bottom side wall of the inner cavity of the two groups of square movable grooves 355 is slidably connected with a pressing plate 353, two groups of sliding grooves 352 of the same structure are symmetrically arranged on the outer wall of the hollow sleeve 351, the bottom end of the pressing plate 353 extends to the inner cavity side wall of the hollow sleeve 351, two groups of springs 354 of the same structure are symmetrically arranged on the bottom of the outer wall of the pressing plate 353, the bottom end of the two groups of springs 354 is arranged on the inner cavity side wall of the square movable groove 355, the pressing plate 353 is slidably connected to the other side wall of the inner cavity bottom of the square movable groove 355, the outer wall of the pressing plate 353 is provided with a rubber friction plate 356, the inner cavity side wall of the other end of the hollow sleeve 351 is provided with a polyurethane waterproof coating 357, the arc surface 3331 arranged on the outer wall of the two groups of sliding blocks 333 abuts against the arc surface 3331 arranged on the outer wall of the two groups of pressing plates 353, the two groups of springs 354 arranged on the bottom of the outer wall of the pressing plate 353 on one side are slidably connected to the other side wall of the inner cavity bottom of the square movable groove 355 to support downward movement, and at the same time support downward movement, the two groups of pressing plates 353 are slidably connected to the inner cavity bottom side wall of the square movable groove 355 to move downward, so that the outer wall of the two groups of pressing plates 353 is provided with a rubber friction plate 356 to abut and connect the outer side walls of the water pipe body 2 and the hot water pipe body 1, and the rubber friction plate 356 improves the friction force to avoid loosening.

[0035] Preferably, the second sliding piece 33 comprises a sliding block 333 symmetrically and slidably connected to the sliding groove 352, the outer wall of one side of the sliding block 333 is provided with a hollow circular surface sleeve 331, the hollow circular surface sleeve 331 is provided with a square groove 332 adjacent to one side of the sliding block 333, the user manually drives the hollow circular surface sleeve 331 to drive the two groups of sliding blocks 333 to slide in the inner wall of the two groups of sliding grooves 352 symmetrically arranged on the outer wall of the hollow sleeve 351 to the side of the pressing plate 353, and the two groups of sliding blocks 333 are driven by the hollow circular surface sleeve 331 to slide in the two groups of square movable grooves 355.

[0036] Preferably, the hollow sleeve 351 comprises a threaded groove 3511 arranged on the outer side wall of the other end, a matching threaded cap 3512 is threadedly connected to the outer side wall of the threaded groove 3511, the threaded groove 3511 is manually rotated to be fixed to the outer wall of the hollow circular surface sleeve 331 through the threaded connection of the matching threaded cap 3512, so that the two groups of sliding blocks 333 are always pressed on the two groups of pressing plates 353, and the outer wall of the two groups of pressing plates 353 is provided with a rubber friction plate 356 to abut on the outer side walls of the water pipe body 2 and the hot water pipe body 1, thereby avoiding loosening.

[0037] Preferably, both the slider 333 and the pressure plate 353 have an arc-shaped surface 3331 on one side of their outer walls, which facilitates the slider 333 to press against the pressure plate 353 and move downwards.

[0038] Preferably, the water pipe body 2 and the hot water pipe body 1 are both provided with rubber gaskets 21 on their inner sidewalls. By using rubber gaskets 21 to connect the water pipe body 2 and the hot water pipe body 1, the water pipe is less likely to deform and form gaps under the action of water temperature. The rubber gaskets 21 themselves compensate for the thermal expansion and contraction gaps of the hot water pipe by their own shrinkage toughness, which greatly reduces the risk of water leakage.

[0039] When the work starts, the user manually connects one end of the connecting water pipe body 2 and the hot water pipe body 1 to the inner cavity of the two sets of hollow sleeves 351, and then to the inner cavity of the waterproof sealing rubber ring 34. The first limiting piece 31 and the second limiting piece 35 are of the same structure, and the first sliding piece 32 and the second sliding piece 33 are of the same structure and have the same operation mode. The user manually makes the hollow circular surface sleeve 331 drive the two sets of sliding blocks 333 to slide in the inner wall of the two sets of sliding grooves 352 of the same structure symmetrically opened on the two sides of the hollow sleeve 351. When the two sets of sliding blocks 333 are driven to slide in the inner cavity of the two sets of square movable grooves 355 of the hollow circular surface sleeve 331, the arc surface 3331 provided on the outer wall of the two sets of sliding blocks 333 is supported by the arc surface 3331 provided on the outer wall of the two sets of pressing plate blocks 353 through the two sets of springs 354 of the same structure symmetrically provided on the bottom of the outer wall on one side and connected to the bottom of the inner cavity of the square movable groove 355 on the other side wall to move downward. At the same time, the two sets of pressing plate blocks 353 are moved downward by the rubber friction pieces 356 provided on the outer wall of the two sets of pressing plate blocks 353 and connected to the outer wall of the connecting water pipe body 2 and the hot water pipe body 1, thereby improving the friction force through the rubber friction pieces 356 to avoid loosening. Then, the matching threaded cap 3512 is screwed on the outer wall of the threaded groove 3511 to be manually rotated to fix the hollow circular surface sleeve 331 on the outer wall of the hollow circular surface sleeve 331, so that the two sets of sliding blocks 333 are always pressed on the two sets of pressing plate blocks 353. The rubber friction pieces 356 provided on the outer wall of the two sets of pressing plate blocks 353 are abutted to the outer wall of the connecting water pipe body 2 and the hot water pipe body 1 to avoid loosening. Through the above structure and operation, the connecting water pipe body 2 and the hot water pipe body 1 are connected, which facilitates the quick disassembly and installation of the two sets of water pipes that need to be connected, does not need to set corresponding nuts to fix the connecting water pipes, improves the installation efficiency and flexibility, and facilitates waterproofing through the polyurethane waterproof coating 357 provided on the inner cavity side wall of the other end of the hollow sleeve 351. A layer of tough protective film can be formed on the surface of the inner cavity side wall of the other end of the hollow sleeve 351, which not only has good waterproof performance, but also can resist mold growth and salt spray corrosion. Through the rubber gasket 21 provided on the inner cavity side wall of the connecting water pipe body 2 and the hot water pipe body 1, when the water pipe is not easy to deform to form a gap under the action of water temperature, the shrinkage toughness of the rubber gasket 21 itself can supplement the thermal expansion and cold contraction gap of the hot water pipe, which greatly reduces the risk of water leakage.

[0040] It is to be understood that the development of the particular implementations described herein was not determined merely by the availability of certain items or materials. Rather and more generally, specific implementations were developed to provide implementations that are functionally, economically, and / or esthetically practical, in light of ongoing technological changes having economic, business, and / or social consequences.

[0041] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, not to limit, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalent, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A structure for sealing between a water pipe and a waterproof coating, characterized by: The application relates to a quick connecting waterproof connector for hot water pipes. The outer side wall of one end of the bottom of the hot water pipe body (1) is connected to the inner side wall of the top of the double-head quick connecting waterproof connector (3), and the outer side wall of one end of the top of the connecting water pipe body (2) is arranged on the outer side wall of one end of the bottom of the hot water pipe body (1). The outer side wall of one end of the top of the connecting water pipe body (2) is connected to the inner side wall of the bottom of the double-head quick connecting waterproof connector (3), and the outer side wall of one end of the top of the connecting water pipe body (2) is arranged on the outer side wall of one end of the bottom of the hot water pipe body (1).

2. A structure for sealing between a water pipe and a waterproof coating according to claim 1, characterized in that: The double-head quick connecting waterproof connector (3) comprises waterproof sealing rubber rings (34) arranged on the outer side walls of one end of the hot water pipe body (1) and the connecting water pipe body (2), the outer side wall of one end of the waterproof sealing rubber ring (34) is provided with a first limiting piece (31), the outer side wall of the other end of the waterproof sealing rubber ring (34) is provided with a second limiting piece (35) with the same structure as the first limiting piece (31) adjacent to the first limiting piece (31), the outer side wall of the first limiting piece (31) is provided with a first sliding piece (32), and the outer side wall of the second limiting piece (35) is provided with a second sliding piece (33) with the same structure as the first sliding piece (32).

3. A structure for sealing between a water pipe and a waterproof coating according to claim 2, wherein: The second limiting piece (35) comprises a hollow sleeve (351) arranged on the outer side wall of one end of the waterproof sealing rubber ring (34) and adjacent to the first limiting piece (31), two groups of square movable grooves (355) with the same structure are symmetrically formed in the inner cavity of one side of the hollow sleeve (351), a pressing plate (353) is slidably connected to the inner cavity bottom side wall of each of the two groups of square movable grooves (355), two groups of sliding grooves (352) with the same structure are symmetrically formed in the outer walls of the two sides of the hollow sleeve (351), the bottom end of the pressing plate (353) extends to the inner cavity side wall of the hollow sleeve (351), two groups of springs (354) with the same structure are symmetrically arranged on the outer wall of one side of the pressing plate (353), the bottom end of each of the two groups of springs (354) is arranged on the inner cavity side wall of the square movable groove (355), and the one side of the pressing plate (353) is slidably connected to the other side wall of the inner cavity of the square movable groove (355), the outer side wall of the pressing plate (353) is provided with a rubber friction piece (356), and the inner cavity side wall of the other end of the hollow sleeve (351) is provided with a polyurethane waterproof coating (357).

4. A structure for sealing between a water pipe and a waterproof coating according to claim 3, wherein: The second sliding piece (33) comprises a sliding block (333) symmetrically and slidably connected to the sliding groove (352), and the outer wall of one side of the sliding block (333) is provided with a hollow circular surface sleeve (331), and the hollow circular surface sleeve (331) is provided with a square groove (332) adjacent to one side of the sliding block (333).

5. The structure according to claim 3, wherein: The outer side wall of the other end of the hollow sleeve (351) is provided with a threaded groove (3511), and the outer side wall of the threaded groove (3511) is threadedly connected with a matching threaded cap (3512).

6. A water pipe and waterproof coating sealed structure according to claim 4, characterized in that: The slider (333) and the pressing plate (353) are provided with arc surfaces (3331) on one side of the outer wall.

7. The structure of claim 1, wherein: The connecting water pipe body (2) and the hot water pipe body (1) are provided with rubber gaskets (21) on the inner cavity side wall.

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