A connecting device for building water supply and drainage pipes

Abstract

The present invention relates to the technical field of pipe connection devices, and particularly to a connection device for building water supply and drainage pipes. The materials of the rubber plug pipe and the rubber sleeve cause the connection between the two pipes to be unstable, resulting in insufficient connection. Moreover, the rubber plug pipe and the rubber sleeve are prone to deformation and expansion at high temperatures, so the initial pressure may cause irreversible damage to the rubber plug pipe and the rubber sleeve, affecting the subsequent use effect. A connection device for building water supply and drainage pipes includes: a pipe A and a pipe B; a connection assembly provided on the pipe A and the pipe B. The pipe A and the pipe B are connected through the cooperation of the rubber plug pipe and the rubber sleeve; the transmission shaft rotates to connect the bolt with the first pipe seat, and the pipe A and the pipe B are locked horizontally; two first pressing plates and two second pressing plates simultaneously squeeze the inner side of the rubber plug pipe, so that the outer side of the rubber plug pipe is in full contact with the inner side of the rubber sleeve, thereby making the connection between the pipe A and the pipe B tighter, and thus enhancing the connection effect.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe connection devices, and particularly to a connection device for building water supply and drainage pipes. Background Art

[0002] The connection of building water supply and drainage pipes is a crucial part of building engineering to ensure the smoothness, safety, and durability of the pipe system. There are various connection methods for pipes, such as flange, thread, welding, clamp, and expansion socket connection, etc. Among them, the expansion socket connection method is more firm and sealed. The traditional expansion socket connection method is to use a rubber sleeve and a rubber plug pipe to cooperate to connect the ends of two pipes. Usually, after the connection, bolts and other fasteners are used to horizontally lock between the two pipes to achieve the effect of secondary connection and significantly enhance the connection effect.

[0003] Due to the material reasons of the rubber plug pipe and the rubber sleeve, the connection between the two pipes is not stable. And currently, when the connection device connects the two pipes, it is not convenient to extrude the inner wall of the rubber plug pipe, resulting in insufficient contact between the rubber plug pipe and the rubber sleeve, and thus the connection is not sufficient and thorough. Moreover, the rubber plug pipe and the rubber sleeve are prone to deformation and expansion when the temperature rises without the need for pressure, and the existing connection device is not convenient to relieve the initial pressure state on the rubber plug pipe at high temperature, resulting in irreversible damage to the rubber plug pipe and the rubber sleeve, affecting the subsequent use effect and low durability, thus leading to poor connection effect. Summary of the Invention

[0004] In order to overcome the above disadvantages, the present invention provides a connection device for building water supply and drainage pipes, which can exert pressure on the inner wall of the rubber sleeve during connection to make the connection between the two pipes more sufficient and thorough, and can relieve the pressure state on the rubber plug pipe in a high-temperature environment to avoid damage and improve durability, thereby comprehensively enhancing the connection effect.

[0005] The technical implementation solution of the present invention is: a connection device for building water supply and drainage pipes, comprising:

[0006] Pipe A and Pipe B;

[0007] A connection assembly, provided on Pipe A and Pipe B;

[0008] A locking mechanism, provided on the connection assembly;

[0009] A release mechanism, provided on the locking mechanism and the connection assembly;

[0010] A pressure - applying mechanism, provided on the release mechanism and the connection assembly.

[0011] Further, the connecting component includes: a first pipe seat fixedly connected to the B pipe, with two first threaded grooves symmetrically formed on the first pipe seat; a second pipe seat fixedly connected to the A pipe, with a cavity formed inside the second pipe seat; a rubber sleeve installed on the first pipe seat; and a rubber plug pipe installed on the second pipe seat.

[0012] Further, the outer side of the rubber plug pipe and the inner side of the rubber sleeve are both wavy structures.

[0013] Further, the locking mechanism includes: a transmission shaft rotatably inserted through the second pipe seat, with hexagonal grooves formed at both ends of the transmission shaft, and second threaded grooves formed on both sides of the transmission shaft; two rotating shafts rotatably connected inside the cavity of the second pipe seat and intersecting perpendicularly with the transmission shaft; two groups of gear sets respectively disposed between the two sides of the transmission shaft and the two rotating shafts; limiting rods respectively fixedly connected to one ends of the two rotating shafts; bolts respectively slidably connected to the two limiting rods, and both bolts pass through two round holes of the second pipe seat and the rubber plug pipe; and two silica gel sleeves respectively installed between the two bolts and the two limiting rods.

[0014] Further, both groups of gear sets are composed of two cross - meshing helical gears. One of the helical gears in the two groups of gear sets is respectively fixedly connected to both sides of the transmission shaft, and the other helical gear in the two groups of gear sets is respectively fixedly connected to the two rotating shafts.

[0015] Further, the release mechanism includes: two sleeve plates respectively sleeved on the two second threaded grooves of the transmission shaft; pins respectively slidably connected inside the two sleeve plates, with one ends of the two pins respectively located in the two second threaded grooves of the transmission shaft; buckles respectively slidably connected to the two sleeve plates, with two folding grooves formed on each of the two buckles, and both sides of the two pins are respectively slidably connected to the four folding grooves; compression springs respectively connecting the two buckles and the two sleeve plates; fixed rods respectively fixedly connected to the mutually remote sides of the two buckles; sliding frames respectively slidably connected to the two fixed rods, with one sides of the two sliding frames respectively passing through and slidably connected to both sides of the second pipe seat; extrusion sleeves respectively sleeved on both ends of the transmission shaft, with spiral grooves formed on both extrusion sleeves, and one ends of the two sliding frames are respectively located in the two spiral grooves, and card slots are formed on both spiral grooves.

[0016] Further, the folding groove is composed of two flat grooves and one inclined groove, and the two flat grooves of the folding groove are located on both sides of the inclined groove and are connected.

[0017] Further, the pressing mechanism includes: pressure - applying plates one respectively fixedly connected to the two sleeve plates, the pressure - applying plates one are slidably connected to the inner side of the second pipe seat, and inclined groove frames respectively fixedly connected to both sides of the inner sides of the two pressure - applying plates one, four in total; sliders respectively slidably connected to the four inclined groove frames; and pressure - applying plates two fixedly connected between the two sliders on the same side of the two pressure - applying plates one, two in total.

[0018] Furthermore, a number of spherical protrusions are provided on the outer sides of the pressing plate one and the pressing plate two.

[0019] Furthermore, a filling mechanism is further included, which is arranged between the pressing plate one and the pressing plate two. The filling mechanism includes: sixteen limiting blocks, and two limiting blocks are fixedly connected to both sides of each pressing plate one and each pressing plate two; a rotating plate rotatably connected to each limiting plate; eight movable shafts rotatably connected between every two adjacent rotating plates; and eight torsion springs connected between every two adjacent rotating plates.

[0020] Compared with the prior art, the present invention has the following advantages: 1. The wave-shaped structures of the rubber plug tube and the rubber sleeve cooperate with each other to effectively connect the A tube and the B tube; the rotation of the transmission shaft drives the rotation of the bolt through the gear set to connect with the thread groove one of the pipe seat one, and then together with the limiting rod, the silica gel sleeve is squeezed. The reaction force of the silica gel sleeve causes the bolt to pull the pipe seat one, thereby laterally locking the A tube and the B tube, significantly enhancing the connection effect; the rotation of the thread groove two of the transmission shaft squeezes the pin to drive the moving plate to move, thereby causing the two pressing plates one and the two pressing plates two to simultaneously squeeze the inner side of the rubber plug tube, so that the outer side of the rubber plug tube is in full contact with the inner side of the rubber sleeve, thereby making the connection between the A tube and the B tube tighter, thus enhancing the connection effect.

[0021] 2. When the temperature is too high, the staff can rotate and squeeze the sleeve so that the spiral groove squeezes the two sliding frames into the card slots, thereby driving the buckle to squeeze the pin to disengage from the thread groove two of the transmission shaft, so that the pressing plate one and the pressing plate two no longer squeeze the rubber plug tube. In this way, damage can be reduced in a high-temperature environment, the durability of the device can be improved, and the service life can be extended.

[0022] 3. While the pressing plate one and the pressing plate two squeeze the rubber plug tube, the gap between the pressing plate one and the pressing plate two will increase. The pressing plate one and the pressing plate two will pull the two rotating plates on the same movable shaft to rotate through the limiting blocks. The rotation of the rotating plates will fill the gap between the pressing plate one and the pressing plate two and press the un-squeezed part of the rubber plug tube, making the pressure on the rubber plug tube more comprehensive, thereby making the connection between the A tube and the B tube more complete, and further enhancing the connection effect between the A tube and the B tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0024] Figure 2 It is a three-dimensional sectional structural schematic diagram of the B tube of the present invention.

[0025] Figure 3 It is a three-dimensional sectional structural schematic diagram of the A tube of the present invention.

[0026] Figure 4Schematic diagram of the split three-dimensional structure of the connection component of the present invention.

[0027] Figure 5 Schematic diagram of the partially sectional three-dimensional structure of the present invention.

[0028] Figure 6 For the present invention Figure 5 Enlarged three-dimensional structure schematic diagram at position A in the present invention.

[0029] Figure 7 Schematic diagram of the sectional three-dimensional structure of the locking mechanism and the second pipe socket of the present invention.

[0030] Figure 8 Schematic diagram of the split three-dimensional structure of the locking mechanism of the present invention.

[0031] Figure 9 Schematic diagram of the partially sectional three-dimensional structure of the locking mechanism of the present invention.

[0032] Figure 10 Schematic diagram of the partially split three-dimensional structure of the locking mechanism of the present invention.

[0033] Figure 11 Schematic diagram of the partially sectional three-dimensional structure of the second pipe socket, the transmission shaft and the release mechanism of the present invention.

[0034] Figure 12 Schematic diagram of the partial three-dimensional structure of the release mechanism and the transmission shaft of the present invention.

[0035] Figure 13 Schematic diagram of the partially split three-dimensional structure of the release mechanism and the transmission shaft of the present invention.

[0036] Figure 14 Schematic diagram of the partially sectional three-dimensional structure of the release mechanism and the transmission shaft of the present invention.

[0037] Figure 15 Schematic diagram of the partially sectional three-dimensional structure of the release mechanism of the present invention.

[0038] Figure 16 Schematic diagram of the sectional three-dimensional structure of the pressing mechanism and the filling mechanism of the present invention.

[0039] Figure 17 Schematic diagram of the split three-dimensional structure of the pressing mechanism of the present invention.

[0040] Figure 18 Schematic diagram of the partial three-dimensional structure of the filling mechanism of the present invention.

[0041] Figure 19 Schematic diagram of the partially split three-dimensional structure of the filling mechanism of the present invention.

[0042] Attached drawing reference numerals: 1 - A pipe, 2 - B pipe, 31 - Pipe socket one, 32 - Pipe socket two, 33 - Rubber sleeve, 34 - Rubber plug pipe, 41 - Transmission shaft, 411 - Hexagonal groove, 42 - Rotating shaft, 43 - Gear set, 44 - Limit rod, 45 - Bolt, 46 - Silicone sleeve, 51 - Sleeve plate, 52 - Pin, 53 - Snap fastener, 531 - Folding groove, 54 - Compression spring, 55 - Fixed rod, 56 - Sliding frame, 57 - Extrusion sleeve, 571 - Spiral groove, 572 - Card slot, 61 - Pressure - applying plate one, 62 - Inclined groove frame, 63 - Slide block, 64 - Pressure - applying plate two, 71 - Limit block, 72 - Rotating plate, 73 - Movable shaft, 74 - Torsion spring. Detailed implementation mode

[0043] The present invention will be described in detail below in conjunction with the attached drawings and specific embodiments, but it is not intended to limit the present invention.

[0044] Embodiment 1: A connecting device for building water supply and drainage pipes, as Figures 1 - 17 shown, includes:

[0045] A pipe 1 and B pipe 2;

[0046] A connecting component for initially connecting A pipe 1 and B pipe 2, provided on A pipe 1 and B pipe 2;

[0047] A locking mechanism for horizontally locking the connection between A pipe 1 and B pipe 2 and the connecting component, provided on the connecting component;

[0048] A release mechanism, provided on the locking mechanism and the connecting component;

[0049] A pressure - applying mechanism for applying pressure to the connecting component from the inside to the outside, provided on the release mechanism and the connecting component, and the release mechanism is used to release the pressure - applying state of the pressure - applying mechanism.

[0050] The connecting component includes: Pipe socket one 31 connected to B pipe 2 by bolts, with two first threaded grooves symmetrically opened on pipe socket one 31; Pipe socket two 32 connected to A pipe 1 by bolts, with a cavity opened inside the pipe socket two 32; A rubber sleeve 33 installed on pipe socket one 31; A rubber plug pipe 34 installed on pipe socket two 32 for plugging into the rubber sleeve 33, and two round holes are opened on both the rubber sleeve 33 and the rubber plug pipe 34.

[0051] The outer side of the rubber plug pipe 34 and the inner side of the rubber sleeve 33 are both wavy structures, which can effectively cooperate for connection.

[0052] The locking mechanism includes: a transmission shaft 41 rotatably inserted into the second pipe seat 32. Both ends of the transmission shaft 41 are provided with hexagonal grooves 411 for the staff to rotate the transmission shaft 41. Thread grooves II are provided on both sides of the transmission shaft 41, and the two thread grooves II on the transmission shaft 41 are symmetrically arranged; two rotating shafts 42 rotatably connected in the cavity of the second pipe seat 32 and intersecting perpendicularly with the transmission shaft 41, both located in the cavity of the second pipe seat 32, and the two rotating shafts 42 are symmetrically arranged; two sets of gear sets 43 respectively arranged between the two sides of the transmission shaft 41 and the two rotating shafts 42, both located in the cavity of the second pipe seat 32, for driving the two rotating shafts 42 to rotate through the transmission shaft 41; limit rods 44 respectively welded to one end of the two rotating shafts 42; bolts 45 respectively slidably connected to the two limit rods 44, and both bolts 45 pass through the two round holes of the second pipe seat 32 and the rubber plug pipe 34, and the bolts 45 can cooperate with the thread groove I on the first pipe seat 31; two silica gel sleeves 46 respectively installed between the two bolts 45 and the two limit rods 44, for applying tension, and the silica gel sleeves 46 are located inside the bolts 45.

[0053] Both sets of gear sets 43 are composed of two cross-engaged helical gears. One of the helical gears in the two sets of gear sets 43 is respectively connected to both sides of the transmission shaft 41 through key grooves, and the other helical gear in the two sets of gear sets 43 is respectively connected to the two rotating shafts 42 through key grooves.

[0054] The release mechanism includes: two sleeve plates 51 symmetrically arranged at the center, respectively sleeved on the two thread grooves II of the transmission shaft 41, and both sides of the two sleeve plates 51 are in contact with the two inner walls of the second pipe seat 32; pins 52 respectively slidably connected in the two sleeve plates 51, for driving the sleeve plates 51 to move through the thread grooves II of the transmission shaft 41, symmetrically arranged at the center, and one end of the two pins 52 is respectively located in the two thread grooves II of the transmission shaft 41; buckles 53 respectively slidably connected to the two sleeve plates 51, for clamping the pins 52, and two folding grooves 531 are provided on both buckles 53, and both sides of the two pins 52 are respectively slidably connected to the four folding grooves 531; compression springs 54 are respectively connected between the two buckles 53 and the two sleeve plates 51, located inside the sleeve plates 51; fixed rods 55 respectively welded to the mutually remote sides of the two buckles 53; sliding frames 56 respectively slidably connected to the two fixed rods 55, the two sliding frames 56 are symmetrically arranged, and one side of the two sliding frames 56 respectively passes through and is slidably connected to the two sides of the second pipe seat 32; extrusion sleeves 57 respectively sleeved on both ends of the transmission shaft 41, spiral grooves 571 are provided on both extrusion sleeves 57, one end of the two sliding frames 56 is respectively located in the two spiral grooves 571, and clamping grooves 572 are provided on both spiral grooves 571 for clamping the sliding frames 56.

[0055] The folding groove 531 is composed of two flat grooves and an inclined groove. The two flat grooves of the folding groove 531 are located on both sides of the inclined groove and are connected.

[0056] The pressing mechanism includes: pressing plates one 61 respectively welded to the two sleeve plates 51, which are symmetrically arranged. The pressing plates one 61 are slidably connected to the inner sides of the pipe sockets two 32. There are four inclined groove frames 62 respectively welded to both sides of the inner sides of the two pressing plates one 61; sliders 63 respectively slidably connected to the four inclined groove frames 62; there is one pressing plate two 64 welded between the two sliders 63 on the same side of the two pressing plates one 61, a total of two. The pressing plates one 61 and the pressing plates two 64 are used to squeeze the inner wall of the rubber plug tube 34.

[0057] A number of spherical protrusions are provided on the outer sides of the pressing plates one 61 and the pressing plates two 64, which can more effectively squeeze the inner wall of the rubber plug tube 34.

[0058] First, the staff installs the pipe socket one 31 and the pipe socket two 32 on the A pipe 1 and the B pipe 2 respectively as Figure 1 shown. When it is necessary to connect the A pipe 1 and the B pipe 2, the staff moves one of the A pipe 1 and the B pipe 2 to dock with the other, and makes the rubber plug tube 34 stuffed into the rubber sleeve 33. The wavy structures of the rubber plug tube 34 and the rubber sleeve 33 will cooperate with each other, so that the A pipe 1 and the B pipe 2 are effectively connected; after the rubber plug tube 34 is stuffed into the rubber sleeve 33, the bolt 45 will pass through the round hole of the rubber sleeve 33 and contact the thread groove one of the pipe socket one 31. At this time, the staff can use a hexagonal wrench to rotate the transmission shaft 41 through the hexagonal groove 411. The rotation of the transmission shaft 41 drives the rotating shaft 42, the limiting rod 44 and the bolt 45 to rotate together through the gear set 43. The rotation of the bolt 45 will be connected to the thread groove one of the pipe socket one 31. When the bolt 45 is connected, it will move in the direction away from the rotating shaft 42. The movement of the bolt 45 will squeeze the silica gel sleeve 46 together with the limiting rod 44. Under the reaction force of the silica gel sleeve 46, the bolt 45 pulls the pipe socket one 31 through the thread groove one of the pipe socket one 31, and then horizontally locks the A pipe 1 and the B pipe 2 through the pipe socket one 31 and the pipe socket two 32, significantly enhancing the connection effect; the rotation of the thread groove two of the transmission shaft 41 will squeeze the two pins 52 to drive the two sleeve plates 51 to move away from each other, and then drive the two pressing plates one 61 to move away from each other. The two pressing plates one 61 drive the four inclined groove frames 62 to move, and then squeeze the four sliders 63 to drive the two pressing plates two 64 to move away from each other. In this way, the two pressing plates one 61 and the two pressing plates two 64 simultaneously squeeze the inner side of the rubber plug tube 34, so that the outer side of the rubber plug tube 34 is in full contact with the inner side of the rubber sleeve 33, and further makes the connection between the A pipe 1 and the B pipe 2 tighter, thereby enhancing the connection effect;

[0059] Since the rubber plug tube 34 and the rubber sleeve 33 are prone to deformation and expansion when the temperature rises and no pressure is required, the continuous extrusion state of the pressing plate one 61 and the pressing plate two 64 will cause irreversible damage to the rubber plug tube 34 and the rubber sleeve 33, resulting in poor subsequent use effects. Therefore, when the temperature is too high, the staff can rotate the two extrusion sleeves 57 so that the two spiral grooves 571 extrude the two sliding frames 56 to move. When the spiral grooves 571 continue to rotate, the sliding frames 56 are caught in the card slots 572. The movement of the sliding frames 56 drives the buckle 53 to move through the fixed rod 55, and the compression spring 54 is compressed. Under the action of the folding groove 531, the folding groove 531 will squeeze the pin 52 to move away from the transmission shaft 41, so that the pin 52 is disengaged from the second thread groove of the transmission shaft 41, and then the pressing plate one 61 and the pressing plate two 64 no longer squeeze the rubber plug tube 34. Subsequently, the staff reversely rotates the extrusion sleeve 57 so that the sliding frame 56 disengages from the card slot 572, and the compression spring 54 resets to drive the buckle 53 to reset. The folding groove 531 squeezes the pin 52 to reset and re-contact the second thread groove of the transmission shaft 41. The buckle 53 drives the sliding frame 56 to squeeze the spiral groove 571 through the fixed rod 55 to reset the extrusion sleeve 57. In this way, damage can be reduced in a high-temperature environment, the durability of the device can be improved, and the service life can be extended; when it is necessary to disconnect the connection between the A tube 1 and the B tube 2, the staff uses a hexagonal wrench to reversely rotate the transmission shaft 41 through the hexagonal groove 411, and then reversely rotates the bolt 45 through the gear set 43 to disengage from the first thread groove of the pipe seat one 31. Subsequently, the staff can pull out the rubber plug tube 34 from the rubber sleeve 33.

[0060] Embodiment 2: On the basis of Embodiment 1, as Figures 1 - 3 , Figure 5 , Figure 16 , Figure 18 and Figure 19 shown, it further includes a filling mechanism for filling the gap between the pressing plate one 61 and the pressing plate two 64, which is arranged between the pressing plate one 61 and the pressing plate two 64. The filling mechanism includes: sixteen limit blocks 71, and two limit blocks 71 are welded on both sides of each pressing plate one 61 and each pressing plate two 64; a rotating plate 72 rotatably connected to each limit plate for filling the gap between the pressing plate one 61 and the pressing plate two 64; an activity shaft 73 rotatably connected between every two adjacent rotating plates 72, a total of eight; a torsion spring 74 is connected between every two adjacent rotating plates 72, a total of eight, and the eight torsion springs 74 are respectively sleeved on the eight activity shafts 73.

[0061] While the pressing plate one 61 and the pressing plate two 64 extrude the rubber plug tube 34, the gap between the pressing plate one 61 and the pressing plate two 64 will increase. The pressing plate one 61 and the pressing plate two 64 will pull the two rotating plates 72 on the same movable shaft 73 to rotate through the limit blocks 71, and the torsion spring 74 is twisted. The rotation of the rotating plate 72 will fill the gap between the pressing plate one 61 and the pressing plate two 64 and press the unextruded part of the rubber plug tube 34, making the pressure on the rubber plug tube 34 more comprehensive, thereby making the connection between the A tube 1 and the B tube 2 more thorough, and further enhancing the connection effect between the A tube 1 and the B tube 2. When the pressing plate one 61 and the pressing plate two 64 no longer extrude the rubber plug tube, the pressing plate one 61 and the pressing plate two 64 no longer pull the rotating plate 72 through the limit blocks 71, and the torsion spring 74 resets to drive the rotating plate 72 to reset.

[0062] The above are only examples of the present invention and are not intended to limit the present invention. All equivalent replacements made within the principle of the present invention shall be included within the protection scope of the present invention. The content not elaborated in detail in the present invention belongs to the well-known prior art in the technical field of the present profession.

Claims

1. A connecting device for building water supply and drainage pipes, characterized in that: Including: Pipe A (1) and Pipe B (2); A connecting component, provided on Pipe A (1) and Pipe B (2); A locking mechanism, provided on the connecting component; A release mechanism, provided on the locking mechanism and the connecting component; A pressing mechanism, used to press the connecting component from the inside to the outside, provided on the release mechanism and the connecting component, and the release mechanism is used to release the pressing state of the pressing mechanism; The connecting component includes: a first pipe seat (31) fixedly connected to Pipe B (2), two first thread grooves are symmetrically formed on the first pipe seat (31); a second pipe seat (32) fixedly connected to Pipe A (1), a cavity is formed inside the second pipe seat (32); a rubber sleeve (33) installed on the first pipe seat (31); a rubber plug pipe (34) installed on the second pipe seat (32) for plugging into the rubber sleeve (33); The locking mechanism includes: a transmission shaft (41) rotatably penetrating through the second pipe seat (32), hexagonal grooves (411) are formed at both ends of the transmission shaft (41), and second thread grooves are formed on both sides of the transmission shaft (41); two rotating shafts (42) rotatably connected inside the cavity of the second pipe seat (32) and intersecting perpendicularly with the transmission shaft (41); two sets of gear sets (43), respectively provided between the two sides of the transmission shaft (41) and the two rotating shafts (42); limiting rods (44) fixedly connected to one end of the two rotating shafts (42) respectively; bolts (45) slidably connected to the two limiting rods (44) respectively, both bolts (45) pass through two circular holes of the second pipe seat (32) and the rubber plug pipe (34), and the bolts (45) can cooperate with the first thread grooves on the first pipe seat (31); silica gel sleeves (46) respectively installed between the two bolts (45) and the two limiting rods (44), a total of two; The release mechanism includes: two sleeve plates (51), respectively sleeved on the two second thread grooves of the transmission shaft (41); pins (52) slidably connected inside the two sleeve plates (51) respectively, one ends of the two pins (52) are respectively located in the two second thread grooves of the transmission shaft (41); buckles (53) slidably connected to the two sleeve plates (51) respectively, two folding grooves (531) are formed on the two buckles (53), and both sides of the two pins (52) are slidably connected to the four folding grooves (531) respectively; compression springs (54) are connected between the two buckles (53) and the two sleeve plates (51) respectively; fixing rods (55) fixedly connected to the mutually remote sides of the two buckles (53) respectively; sliding frames (56) slidably connected to the two fixing rods (55) respectively, one sides of the two sliding frames (56) respectively penetrate and are slidably connected to both sides of the second pipe seat (32); extrusion sleeves (57) respectively sleeved on both ends of the transmission shaft (41), spiral grooves (571) are formed on the two extrusion sleeves (57), one ends of the two sliding frames (56) are respectively located in the two spiral grooves (571), and clamping grooves (572) are formed on the two spiral grooves (571).

2. The connecting device for building water supply and drainage pipes according to claim 1, characterized in that: The outer side of the rubber plug pipe (34) and the inner side of the rubber sleeve (33) are both wavy structures.

3. The connecting device for building water supply and drainage pipes according to claim 1, characterized in that: Both sets of gear sets (43) are composed of two cross-engaged helical gears. One of the helical gears in each of the two sets of gear sets (43) is fixedly connected to both sides of the transmission shaft (41), and the other helical gear in each of the two sets of gear sets (43) is fixedly connected to two rotating shafts (42).

4. A connecting device for building water supply and drainage pipes according to claim 1, characterized in that: The folding groove (531) is composed of two flat grooves and an inclined groove. The two flat grooves of the folding groove (531) are located on both sides of the inclined groove and are connected.

5. The connecting device for building water supply and drainage pipes according to claim 1, characterized in that: The pressing mechanism includes: a first pressing plate (61) fixedly connected to two sleeve plates (51) respectively, the first pressing plate (61) is slidably connected to the inner side of the second pipe seat (32), four inclined groove frames (62) fixedly connected to both inner sides of the two first pressing plates (61) respectively; sliders (63) slidably connected to the four inclined groove frames (62) respectively; a second pressing plate (64) is fixedly connected between two sliders (63) on the same side of the two first pressing plates (61), and there are two in total.

6. The connecting device for building water supply and drainage pipes according to claim 5, characterized in that: A number of spherical protrusions are provided on the outer sides of the first pressing plate (61) and the second pressing plate (64).

7. The connecting device for building water supply and drainage pipes according to claim 5, characterized in that: It further includes a filling mechanism arranged between the first pressing plate (61) and the second pressing plate (64). The filling mechanism includes: sixteen limiting blocks (71), and two limiting blocks (71) are fixedly connected to both sides of each first pressing plate (61) and each second pressing plate (64); rotating plates (72) rotatably connected to each limiting plate respectively; eight movable shafts (73) rotatably connected between every two adjacent rotating plates (72); eight torsion springs (74) are connected between every two adjacent rotating plates (72).

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