Quick connecting fitting for water supply and drainage pipeline

Abstract

The utility model discloses a quick connecting fitting for a water supply and drainage pipeline, which relates to the technical field of drainage pipelines and comprises a pipe body I and a pipe body II, the pipe body II is arranged at the rear end of the pipe body I, and a sealing element is sleeved at the joint of the rear end of the pipe body I and the front end of the pipe body II. The pipe body I, the pipe body II, the sealing piece, the butt joint cylinder, the sealing gasket, the elastic sealing ring, the placing groove, the fixing device, the self-locking assembly, the positioning rod, the lock head, the push spring, the clamping groove, the extrusion piece, the bending piece, the extrusion groove, the linkage control assembly, the butt joint piece and the sealing ring groove are matched for use; the problems that existing drainage pipeline connection mostly depends on flanges, threads, adhesive glue and other traditional modes, special tools need to be used for installation and connection, operation is tedious, efficiency is low, time and labor are consumed, and connection and follow-up disassembly, assembly and replacement work efficiency can be affected are solved to a certain degree.

Description

Technical Field

[0001] This utility model relates to the field of drainage pipe technology, specifically a quick-connect fitting for water supply and drainage pipes. Background Technology

[0002] Drainage pipes are an essential part of urban infrastructure, playing a crucial role in collecting, transporting, and discharging domestic sewage, industrial wastewater, and rainwater. They are typically made of corrosion-resistant materials such as PVC, cast iron, or concrete, and are classified into sewage pipes, rainwater pipes, and combined sewer pipes according to their purpose. Through scientific slope design and pipe network layout, they ensure smooth water flow and prevent flooding and pollution. From household kitchens and bathrooms to municipal pipe networks, drainage pipes silently maintain the balance of public health and the ecological environment, and are an indispensable and invisible contributor to the normal operation of modern cities.

[0003] Existing drainage pipe connections mostly rely on traditional methods such as flanges, threads, and adhesives. These methods also require specific tools for installation and connection, which is cumbersome and inefficient. They are not only time-consuming and labor-intensive, but also affect the efficiency of connection and subsequent disassembly and replacement work. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide a quick-connect fitting for water supply and drainage pipes. This fitting offers the advantages of quick connection and fixation, eliminating the need for tools for rapid connection and disassembly, thus improving the efficiency of assembly and disassembly. To a certain extent, this improves or solves the problem that existing drainage pipe connections rely heavily on traditional methods such as flanges, threads, and adhesives, which require specific tools for installation and connection. This process is cumbersome and inefficient, not only time-consuming and labor-intensive but also affecting the efficiency of connection and subsequent disassembly and replacement.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-connect fitting for water supply and drainage pipes, comprising a pipe body one and a pipe body two, wherein the pipe body two is disposed at the rear end of the pipe body one, a sealing element is sleeved at the connection between the rear end of the pipe body one and the front end of the pipe body two, the sealing element is fixedly connected to the front end of the pipe body two, and placement grooves are provided on both the upper and lower surfaces of the front end of the sealing element, and a fixing device is provided inside each of the two placement grooves; a connecting piece is provided on the front side of the sealing element, and the connecting piece is fixedly connected to the rear end of the pipe body one.

[0006] The fixing device includes a self-locking component, a pressing component, and a linkage control component. There are two self-locking components, which are respectively disposed on the left and right sides of the front end inside the placement slot. There are two pressing components, which are respectively disposed at the rear end of the two self-locking components. The linkage control component is disposed at the rear end of the pressing component.

[0007] As a preferred embodiment of this utility model, the sealing element includes a connecting cylinder, a sealing gasket, and an elastic sealing ring. The connecting cylinder is sleeved on the front end of the second tube and is fixedly connected to the second tube. The sealing gasket is disposed in the middle of the connecting cylinder and is fixedly connected to the front surface of the second tube and the inner wall of the connecting cylinder. The number of elastic sealing rings is three, and they are evenly fixedly connected to the inner wall of the front end of the connecting cylinder. The two placement grooves are respectively opened on the upper and lower surfaces of the front end of the connecting cylinder.

[0008] In a preferred embodiment of this utility model, the rear end of the tube body corresponds to and is adapted to the connected cylinder, and three sealing ring grooves are evenly provided on the surface of the rear end of the tube body, with the positions of the three sealing ring grooves corresponding to and adapted to the positions of the three elastic sealing rings.

[0009] As a preferred embodiment of this utility model, the docking component includes a fixing ring and a clamping head. The fixing ring is disposed in front of the docking cylinder and sleeved on the rear end surface of the tube body, and is fixedly connected to the tube body. There are two clamping heads, which are respectively fixedly connected to the upper and lower ends of the rear surface of the fixing ring and correspond to the positions of the two placement slots.

[0010] In a preferred embodiment of this invention, the self-locking assembly includes positioning rods, a lock head, push springs, and slots. There are two positioning rods, both fixedly connected to the right side of the placement slot. The lock head is sleeved on the left end surface of the two positioning rods and slidably connected to them. There are two push springs, each sleeved on the surface of one of the two positioning rods. The left and right ends of the two push springs are fixedly connected to the right side of the lock head and the right side surface of the placement slot, respectively. The slots are formed on the left surface of the lock head and penetrate it. The left and right sides of the rear end of the lock head correspond to and are adapted to the positions of the two slots.

[0011] In a preferred embodiment of this invention, the extrusion member includes a bent member and an extrusion groove. The bent member is fixedly connected to the rear surface of the lock head, and the extrusion groove is formed at the rear end of the bent member.

[0012] In a preferred embodiment of this invention, the linkage control component includes a slide bar, a slide plate, a pressure bar, and a pull button. There are two slide bars, each fixedly connected to the left and right sides of the rear surface inside the placement groove. The slide plate is fitted onto the front surfaces of the two slide bars and slidably connected to them. There are two pressure bars, each fixedly connected to the left and right sides of the upper surface of the slide plate. The upper ends of both pressure bars extend into the two extrusion grooves and slidably connect to them. The pull button is fixedly connected to the upper surface of the slide plate, and its upper end extends out of the placement groove and slidably connects to it.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, through the coordinated use of a pipe body, a pipe body, a sealing element, a connecting cylinder, a sealing gasket, an elastic sealing ring, a placement groove, a fixing device, a self-locking component, a positioning rod, a lock head, a push spring, a slot, an extrusion component, a bending component, an extrusion groove, a linkage control component, a sliding rod, a sliding plate, a pressure rod, a pull button, a connecting component, a fixing ring, a lock head, and a sealing ring groove, improves or solves to a certain extent the problem that existing drainage pipe connections mostly rely on flanges, threads, and adhesives, and require the use of specific tools for installation and connection, which is cumbersome and inefficient, not only time-consuming and labor-intensive but also affects the efficiency of connection and subsequent disassembly and replacement work.

[0015] 2. This utility model achieves precise sealing by using the cooperation of the connecting cylinder, sealing gasket, elastic sealing ring and the sealing ring groove at the rear end of the pipe body, as well as the linkage of the fixing ring, the clamp and the lock. When the pipe body is inserted into the connecting cylinder, the elastic sealing ring is squeezed and deformed, and after it is in place, it rebounds and locks into the sealing ring groove. At the same time, the mechanical fixing is achieved by the cooperation of the clamp and the lock, which ensures the sealing and stability of the pipeline connection and improves the installation efficiency.

[0016] 3. This utility model achieves automatic locking by cooperating the positioning rod, lock head, push spring and slot in the self-locking assembly, as well as the linkage of the extrusion component and the linkage control component. When the pipe is inserted, the slot compresses the lock head and push spring into place, and the push spring rebounds to drive the lock head to engage with the slot. Furthermore, the convenient unlocking is achieved by pulling the button to drive the slide plate and pressure rod to trigger the extrusion slot, forcing the lock head to separate from the slot. This ensures the mechanical stability of the pipe connection and the efficiency of quick assembly and disassembly. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the connection between tube body one and tube body two of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional planar structure;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure after the explosion.

[0020] Figure 4 This is a three-dimensional structural diagram of the fixing device.

[0021] In the diagram: 1. Pipe body one; 2. Pipe body two; 3. Sealing element; 31. Connecting cylinder; 32. Sealing gasket; 33. Elastic sealing ring; 4. Placement groove; 5. Fixing device; 51. Self-locking assembly; 511. Positioning rod; 512. Lock head; 513. Push spring; 514. Slot; 52. Extrusion part; 521. Bending part; 522. Extrusion groove; 53. Linkage control assembly; 531. Slide rod; 532. Slide plate; 533. Pressure rod; 534. Pull button; 6. Connecting part; 61. Fixing ring; 62. Slot head; 7. Sealing ring groove. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0026] Example 1

[0027] Reference Figure 1-4 This is the first embodiment of the present utility model, which provides a quick connection fitting for water supply and drainage pipes, including a pipe body 1 and a pipe body 2. The pipe body 2 is located at the rear end of the pipe body 1. A sealing element 3 is sleeved at the connection between the rear end of the pipe body 1 and the front end of the pipe body 2. The sealing element 3 is fixedly connected to the front end of the pipe body 2. Placement grooves 4 are opened on both the upper and lower surfaces of the front end of the sealing element 3. Fixing devices 5 are provided inside the two placement grooves 4. A connecting part 6 is provided on the front side of the sealing element 3. The connecting part 6 is fixedly connected to the rear end of the pipe body 1.

[0028] The fixing device 5 includes a self-locking component 51, a pressing component 52, and a linkage control component 53. There are two self-locking components 51, which are respectively arranged on the left and right sides of the front end inside the placement groove 4. There are two pressing components 52, which are respectively arranged at the rear end of the two self-locking components 51. The linkage control component 53 is arranged at the rear end of the pressing component 52.

[0029] Specifically, through the cooperation of the sealing element 3 and the docking element 6, and the quick fixing design of the fixing device 5 during connection, a quick sealing connection and convenient disassembly are achieved between pipe body 1 and pipe body 2, which significantly improves the efficiency of pipe installation and enhances the stability of the connection.

[0030] Furthermore, during connection, the rear end of the tube 1 is inserted into the sleeve of the sealing element 3. The sealing gasket 32 ​​is squeezed and the elastic sealing ring 33 cooperates with the sealing ring groove 7 to achieve sealing. At the same time, the docking part 6 will cooperate with the two fixing devices 5 to quickly lock.

[0031] Example 2

[0032] The second embodiment of this utility model provides a quick connection accessory for water supply and drainage pipes. The sealing element 3 includes a connecting cylinder 31, a sealing gasket 32, and an elastic sealing ring 33. The connecting cylinder 31 is sleeved on the front end of the pipe body 2 and is fixedly connected to the pipe body 2. The sealing gasket 32 ​​is located in the middle of the connecting cylinder 31 and is fixedly connected to the front surface of the pipe body 2 and the inner wall of the connecting cylinder 31. There are three elastic sealing rings 33, which are evenly fixedly connected to the inner wall of the front end of the connecting cylinder 31. Two placement grooves 4 are respectively opened on the upper and lower surfaces of the front end of the connecting cylinder 31.

[0033] The rear end of the tube body 1 corresponds to and is compatible with the connected cylinder 31. Three sealing ring grooves 7 are evenly opened on the rear end surface of the tube body 1. The positions of the three sealing ring grooves 7 and the three elastic sealing rings 33 correspond to and are compatible with each other.

[0034] The docking component 6 includes a fixing ring 61 and a clamp 62. The fixing ring 61 is located in front of the docking cylinder 31 and is sleeved on the rear end surface of the tube body 1 and is fixedly connected to the tube body 1. There are two clamps 62, which are fixedly connected to the upper and lower ends of the rear surface of the fixing ring 61 respectively, and correspond to the positions of the two placement slots 4.

[0035] Specifically, through the cooperation of the connecting sleeve 31, sealing gasket 32, elastic sealing ring 33 and the sealing ring groove 7 at the rear end of the pipe body 1, as well as the linkage of the fixing ring 61 and the clamp 62 with the lock head 512, the elastic sealing ring 33 is squeezed and deformed when the pipe body 1 and the connecting sleeve 31 are inserted, and then rebounds and clamps into the sealing ring groove 7 for precise sealing. At the same time, the clamp 62 and the lock head 512 cooperate to achieve mechanical fixation, ensuring the sealing and stability of the pipeline connection and improving the installation efficiency.

[0036] Furthermore, align the clamp head 62 with the two placement slots 4, and then insert the rear end of the tube body 1 into the docking cylinder 31. As the tube body 1 is inserted, it first compresses and deforms the elastic sealing ring 33. At the same time, as the tube body 1 moves backward, it drives the fixing ring 61 to move backward, so that the two clamp heads 62 are inserted into the two placement slots 4 as the tube body 1 is inserted to the rear end. This causes the clamp heads 62 to compress the two locking heads 512. When the tube body 1 is inserted backward to the point of contact with the sealing gasket 32, the three elastic sealing rings 33 will correspond to the three sealing ring grooves 7 on the surface of the tube body 1. This causes the elastic sealing rings 33 to be no longer compressed, to rebound and sink into the inner wall of the sealing ring grooves 7, thereby achieving a sealing connection.

[0037] Example 3

[0038] The third embodiment of this utility model provides a quick-connect fitting for water supply and drainage pipes. The self-locking assembly 51 includes a positioning rod 511, a locking head 512, a push spring 513, and a slot 514. There are two positioning rods 511, both of which are fixedly connected to the right side inside the placement groove 4. The locking head 512 is sleeved on the left end surface of the two positioning rods 511 and is slidably connected to the positioning rods 511. There are two push springs 513, which are respectively sleeved on the surface of the two positioning rods 511. The left and right ends of the two push springs 513 are fixedly connected to the right side of the locking head 512 and the right side surface inside the placement groove 4, respectively. The slot 514 is opened on the left surface of the locking head 512 and penetrates the locking head 512. The left and right sides of the rear end of the slot 62 correspond to and are adapted to the positions of the two slots 514.

[0039] The extrusion part 52 includes a bent part 521 and an extrusion groove 522. The bent part 521 is fixedly connected to the rear surface of the lock head 512, and the extrusion groove 522 is formed at the rear end of the bent part 521.

[0040] The linkage control component 53 includes a slide bar 531, a slide plate 532, a pressure bar 533, and a pull button 534. There are two slide bars 531, which are fixedly connected to the left and right sides of the rear surface inside the placement groove 4, respectively. The slide plate 532 is fitted onto the front surface of the two slide bars 531 and is slidably connected to the slide bars 531. There are two pressure bars 533, which are fixedly connected to the left and right sides of the upper surface of the slide plate 532, respectively. The upper ends of the two pressure bars 533 extend into the two extrusion grooves 522 and are slidably connected to the extrusion grooves 522. The pull button 534 is fixedly connected to the upper surface of the slide plate 532, and its upper end extends out of the placement groove 4 and is slidably connected to the placement groove 4.

[0041] Specifically, through the cooperation of the positioning rod 511, locking head 512, push spring 513 and slot 514 in the self-locking assembly 51, as well as the linkage of the extrusion component 52 and the linkage control assembly 53, the automatic locking of the locking head 512 into the slot 514 is achieved when the pipe body 1 is inserted, after the slot 62 extrudes the locking head 512 and compresses the push spring 513 into place, the push spring 513 rebounds and drives the locking head 512 to engage with the slot 514. Furthermore, the convenient unlocking is achieved by pulling the button 534 to drive the sliding plate 532 and the pressure rod 533 to trigger the extrusion groove 522 to force the locking head 512 to separate from the slot 514, thus ensuring the mechanical stability of the pipe connection and the efficiency of rapid assembly and disassembly.

[0042] Furthermore, the two locking heads 512, pressed by the locking heads 62, move to the left and right sides on the surface of the positioning rod 511 to open. Simultaneously, they counteract the elastic force of the push spring 513, compressing it. After the tube 1 is inserted into the elastic sealing ring 33, it rebounds and sinks into the inner wall of the sealing ring groove 7 for sealing. At this point, the positions of the left and right sides of the locking heads 62 correspond to the two locking slots 514. The push spring 513 then rebounds, pushing the two locking heads 512 together on the surface of the positioning rod 511, causing the left and right sides of the locking heads 62 to insert into the two locking slots 514 for engagement, thus connecting and fixing them. When disconnecting, pull the button 534 of the linkage control component 53 to the rear, causing the slide plate 532 to move backward on the surface of the two slide rods 531. The backward movement of the slide plate 532 causes the two pressure rods 533 to move backward in the two extrusion grooves 522, pressing the inner wall of the extrusion grooves 522. This causes the two bent parts 521 to be compressed, which in turn causes the two locking heads 512 to move to the left and right sides on the surface of the positioning rod 511, opening them. This allows the two sides of the locking heads 62 to disengage from the two locking slots 514, thereby releasing the fixation. Then, the tube body 1 can be pulled out from the docking cylinder 31, completing the disassembly process.

[0043] Working principle:

[0044] Align the locking heads 62 with the two placement slots 4, and then insert the rear end of the tube body 1 into the docking cylinder 31. As the tube body 1 is inserted, it first compresses and deforms the elastic sealing ring 33. At the same time, as the tube body 1 moves backward, it drives the fixing ring 61 to move backward, causing the two locking heads 62 to be inserted into the two placement slots 4 as the tube body 1 is inserted to the rear. This causes the locking heads 62 to compress the two locking heads 512. When the tube body 1 is inserted backward to the point of contact with the sealing gasket 32, the three elastic sealing rings 33 will correspond to the three sealing ring grooves 7 on the surface of the tube body 1. This causes the elastic sealing rings 33 to be no longer compressed, to rebound and sink into the inner wall of the sealing ring grooves 7, thereby achieving a sealing connection. At the same time, the two locking heads 512 are compressed by the locking heads 62 and move to the left and right sides on the surface of the positioning rod 511 to open. At the same time, they compress the spring force of the push spring 513. As the tube body 1 is inserted into the elastic sealing ring 312, the two locking heads 512 move to the left and right sides to open. This compresses the spring force of the push spring 513. After the spring rebounds and seals itself within the sealing ring groove 7, the positions of the left and right sides of the clamp head 62 will correspond to the two slots 514. At this time, the push spring 513 will rebound, pushing the two locking heads 512 together on the surface of the positioning rod 511, so that the left and right sides of the clamp head 62 are inserted into the two slots 514 for locking, thereby connecting and fixing. When disconnecting later, the pull button 534 of the linkage control component 53 is pulled backward, causing the slide plate 532 to move backward on the surface of the two slide rods 531. The backward movement of the slide plate 532 causes the two pressure rods 533 to move backward in the two extrusion grooves 522, pressing the inner wall of the extrusion grooves 522. This causes the two bent parts 521 to be compressed, causing the two locking heads 512 to move to the left and right sides on the surface of the positioning rod 511 to open, so that the two sides of the clamp head 62 are disengaged from the two slots 514, thereby releasing the fixation. Then, the tube body 1 can be pulled out from the docking cylinder 31, completing the disassembly process.

[0045] In summary, by using the combined components of pipe body 1, pipe body 2, sealing element 3, connecting cylinder 31, sealing gasket 32, elastic sealing ring 33, placement groove 4, fixing device 5, self-locking assembly 51, positioning rod 511, lock head 512, push spring 513, slot 514, extrusion element 52, bending element 521, extrusion groove 522, linkage control assembly 53, slide rod 531, slide plate 532, pressure rod 533, pull button 534, connecting element 6, fixing ring 61, lock head 62, and sealing ring groove 7, rapid connection and fixing are achieved without the need for tools, thus improving the efficiency of assembly and disassembly.

[0046] The push spring 513 used in this application can be additionally equipped with protective measures known in the art under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components 3 or waterproof coatings for equipment waterproofing, etc., which are commonly used by those skilled in the art.

[0047] It should be noted that the push spring 513 is a device or equipment existing in the prior art, or a device or equipment that can be implemented by the prior art. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the device, as well as the materials of each accessory and the selection of various parameters are all common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0048] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0049] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0050] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A quick-connect fitting for water supply and drainage pipes, comprising a pipe body one (1) and a pipe body two (2), wherein the pipe body two (2) is disposed at the rear end of the pipe body one (1), characterized in that: A sealing element (3) is provided at the connection between the rear end of the first tube (1) and the front end of the second tube (2). The sealing element (3) is fixedly connected to the front end of the second tube (2). Placement grooves (4) are provided on both the upper and lower surfaces of the front end of the sealing element (3). Fixing devices (5) are provided inside the two placement grooves (4). A connecting part (6) is provided on the front side of the sealing element (3). The connecting part (6) is fixedly connected to the rear end of the first tube (1). The fixing device (5) includes a self-locking component (51), an extrusion component (52), and a linkage control component (53). There are two self-locking components (51), which are respectively located on the left and right sides of the front end inside the placement groove (4). There are two extrusion components (52), which are respectively located at the rear end of the two self-locking components (51). The linkage control component (53) is located at the rear end of the extrusion component (52).

2. The quick-connect fitting for water supply and drainage pipes according to claim 1, characterized in that: The sealing element (3) includes a docking cylinder (31), a sealing gasket (32) and an elastic sealing ring (33). The docking cylinder (31) is sleeved on the front end of the second tube (2) and fixedly connected to the second tube (2). The sealing gasket (32) is located in the middle of the docking cylinder (31) and is fixedly connected to the front surface of the second tube (2) and the inner wall of the docking cylinder (31). There are three elastic sealing rings (33), which are evenly fixedly connected to the inner wall of the front end of the docking cylinder (31). The two placement grooves (4) are respectively opened on the upper and lower surfaces of the front end of the docking cylinder (31).

3. A quick-connect fitting for water supply and drainage pipes according to claim 2, characterized in that: The rear end of the tube body (1) corresponds to and is adapted to the connected cylinder (31). Three sealing ring grooves (7) are evenly opened on the rear end surface of the tube body (1). The positions of the three sealing ring grooves (7) and the three elastic sealing rings (33) correspond to and are adapted to each other.

4. A quick-connect fitting for water supply and drainage pipes according to claim 2, characterized in that: The docking component (6) includes a fixing ring (61) and a clamp (62). The fixing ring (61) is located in front of the docking cylinder (31) and is sleeved on the rear end surface of the tube body (1) and fixedly connected to the tube body (1). There are two clamps (62), which are fixedly connected to the upper and lower ends of the rear surface of the fixing ring (61) respectively, and correspond to the positions of the two placement slots (4).

5. A quick-connect fitting for water supply and drainage pipes according to claim 4, characterized in that: The self-locking assembly (51) includes a positioning rod (511), a lock head (512), a push spring (513), and a slot (514). There are two positioning rods (511), both of which are fixedly connected to the right side inside the placement slot (4). The lock head (512) is sleeved on the left end surface of the two positioning rods (511) and is slidably connected to the positioning rods (511). There are two push springs (513), which are respectively sleeved on the surface of the two positioning rods (511). The left and right ends of the two push springs (513) are fixedly connected to the right side of the lock head (512) and the right side surface inside the placement slot (4), respectively. The slot (514) is opened on the left surface of the lock head (512) and penetrates the lock head (512). The left and right sides of the rear end of the slot (62) correspond to and are adapted to the positions of the two slots (514).

6. A quick-connect fitting for water supply and drainage pipes according to claim 5, characterized in that: The extrusion member (52) includes a bending member (521) and an extrusion groove (522). The bending member (521) is fixedly connected to the rear surface of the lock head (512), and the extrusion groove (522) is formed at the rear end of the bending member (521).

7. A quick-connect fitting for water supply and drainage pipes according to claim 6, characterized in that: The linkage control component (53) includes a slide bar (531), a slide plate (532), a pressure bar (533), and a pull button (534). There are two slide bars (531), which are fixedly connected to the left and right sides of the rear surface inside the placement groove (4). The slide plate (532) is sleeved on the front surface of the two slide bars (531) and is slidably connected to the slide bars (531). There are two pressure bars (533), which are fixedly connected to the left and right sides of the upper surface of the slide plate (532). The upper ends of the two pressure bars (533) extend into the two extrusion grooves (522) and are slidably connected to the extrusion grooves (522). The pull button (534) is fixedly connected to the upper surface of the slide plate (532) and its upper end extends out of the placement groove (4) and is slidably connected to the placement groove (4).

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