A multi-pass PVC pipe

Abstract

The present invention relates to the technical field of PVC pipes, and in particular to a multi-way PVC pipe, comprising a multi-way pipe, wherein the multi-way pipe is provided with at least three ends, the inner diameters of the multiple ends are all larger than the inner diameter of the multi-way pipe, and a straight-through pipe adapted to the multi-way pipe is coaxially sleeved in the end. The present invention arranges a sleeve and a sealing ring, wherein the inner wall of the sealing ring fits the outer wall of the straight-through pipe, and when the adhesive at the connection between the straight-through pipe and the connecting seat and the sleeve becomes brittle, decomposes or the viscosity decreases, the sealing ring in the installation gap squeezes the outer wall of the straight-through pipe, thereby preventing the liquid in the straight-through pipe from leaking from the connection between the straight-through pipe and the multi-way pipe, thereby ensuring the sealing of the connection between the multi-way pipe and the straight-through pipe. At the same time, the friction between the sealing ring and the straight-through pipe prevents the straight-through pipe and the end from having an axial relative displacement, thereby ensuring the stability of the connection between the multi-way pipe and the straight-through pipe.

Description

Technical Field

[0001] The invention relates to the technical field of PVC pipes, in particular to a multi-pass PVC pipe. Background Art

[0002] PVC (polyvinyl chloride) is an economical, lightweight and corrosion-resistant material. Since PVC pipes have good physical and chemical properties, PVC piping systems are widely used in water supply, drainage, sewage or irrigation fields. In PVC piping systems, due to the confluence or bifurcation of multiple channels, different types of pipe fittings are required to meet this requirement. The common connection forms between pipe fittings and straight-through pipes are: bonding connection, hot-melt connection, threaded connection and flange connection. Among them, threaded connection is more suitable for small-diameter PVC piping systems, and the other connection methods are more suitable for large-diameter PVC piping systems. Furthermore, in daily water supply, drainage and sewage piping systems, the bonding connection is more economical and convenient. Therefore, in indoor water supply, drainage and sewage piping systems, the connection between straight pipes and pipe fittings is mostly carried out in the form of bonding.

[0003] The specific method of adhesive connection is to use a special adhesive for PVC to evenly apply the connection part of the pipe fitting and the straight pipe, then insert the straight pipe into the pipe fitting, and wait for the adhesive to solidify to form the connection strength and seal; however, the water supply, drainage or sewage pipes installed outdoors will accelerate the aging speed of the adhesive due to the radiation of sunlight and the change of temperature difference between day and night, thereby accelerating the embrittlement, decomposition and viscosity reduction of the adhesive, thereby resulting in a decrease in the bonding effect between the pipe fitting and the straight pipe. In addition, under the impact of the water flow in the pipeline, the connection between the straight pipe and the pipe fitting is prone to loosening, resulting in water seepage or even detachment at the connection between the straight pipe and the pipe fitting; for this reason, the prior art provides some solutions. For example, the utility model patent with patent application number CN202222823031.X provides a siphon drainage four-way structure. The technical solution of the utility model patent is: in the four-way A clamping groove is provided at the four water outlets of the inner cavity of the pipe fitting, a sealing sleeve is provided in the clamping groove, and a groove is provided at the four outlets of the four-way pipe fitting, a buffer pad is provided in the groove, and a throat clamp is slidably connected to the surface of the buffer pad, and the friction between the pipe fitting and the straight-through pipe is increased by the sealing sleeve, thereby increasing the stability of the pipe fitting after being connected with the straight-through pipe. At the same time, the throat clamp is squeezed and deformed by the bolt, so that the four-way pipe fitting is deformed, and the pipe fitting and the straight-through pipe are further fixed, and it is prevented that the water in the pipeline leaks from the connection between the pipe fitting and the straight-through pipe to the outside of the pipeline after the adhesive between the pipe fitting and the straight-through pipe is cured; however, in this technical solution, the tightening force of the throat clamp is directly applied to the pipe fitting and the straight-through pipe. Due to direct sunlight, the pipe fitting and the straight-through pipe of the outdoor pipeline system are prone to brittleness after long-term use, and the tightening force of the throat clamp is prone to cracking or damage of the pipe fitting or the straight-through pipe, thereby causing damage to the pipe fitting or the straight-through pipe.

[0004] To this end, the present invention provides a multi-way PVC pipe fitting to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a multi-pass PVC pipe to solve the problem of water seepage or detachment at the connection between the pipe fitting and the straight pipe due to embrittlement, decomposition or decreased viscosity of the adhesive when the pipe fitting and the straight pipe are bonded together, and to solve the shortcomings of the existing technical solutions.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A multi-way PVC pipe comprises a multi-way pipe, wherein the multi-way pipe is provided with at least three ends, the inner diameters of the multiple ends are all larger than the inner diameter of the multi-way pipe, and a straight-through pipe adapted to the multi-way pipe is coaxially sleeved in the end; specifically, a coaxial connecting seat is provided in each of the multiple ends, one end of the connecting seat is connected to the multi-way pipe, and the inner diameter of the connecting seat is equal to the inner diameter of the multi-way pipe, an installation gap is provided between the outer side wall of the connecting seat and the inner side wall of the end, a sealing ring is coaxially provided in the installation gap, a sleeve is provided on the outer side wall of the end, the sleeve comprises a connecting portion and a pressing portion, the connecting portion is threadedly connected to the outer side wall of the end, the inner diameter of the pressing portion is equal to the outer diameter of the straight-through pipe, one end of the pressing portion extends into the end, and the end of the pressing portion extending into the installation gap abuts against the sealing ring.

[0008] When the ends of the straight-through tube and the multi-way tube are coaxially installed, an adhesive is applied to the end where the connecting seat and the straight-through tube are connected to each other, and an adhesive is applied to the inner side wall of the pressing portion, and the straight-through tube is inserted into the end until the straight-through tube abuts against the connecting seat, and the sealing ring is pressed into the installation gap, and then the sleeve is threadedly connected to the end. When the sleeve is threadedly connected to the end, the pressing portion gradually extends into the end and squeezes the sealing ring, and the sealing ring is deformed and squeezes the outer side wall of the straight-through tube; through the arrangement of the sleeve and the sealing ring, the inner side wall of the sleeve is coaxially fitted with the outer side wall of the straight-through tube, and the sealing ring presses the straight-through tube The sealing ring is pressed toward the center of the end, thereby ensuring the coaxiality of the straight-through tube and the end; further, the inner wall of the sealing ring is fitted with the outer wall of the straight-through tube, and when the adhesive at the connection between the straight-through tube and the connecting seat and the sleeve is brittle, decomposed or the viscosity decreases, the sealing ring in the installation gap squeezes the outer wall of the straight-through tube, thereby avoiding the liquid in the straight-through tube from leaking from the connection between the straight-through tube and the multi-way tube, ensuring the sealing of the connection between the multi-way tube and the straight-through tube; at the same time, the friction between the sealing ring and the straight-through tube avoids axial relative displacement between the straight-through tube and the end, ensuring the stability of the connection between the multi-way tube and the straight-through tube.

[0009] Preferably, there are multiple connecting seats in the single end, and the multiple connecting seats are evenly distributed around the circumference, and there are gaps between the multiple connecting seats. The end of the sealing ring abutting against the press-in portion is provided with a No. 1 chamfer, and the No. 1 chamfer is located on the outer wall of the sealing ring, and the end of the press-in portion extending into the end is provided with a No. 2 chamfer, and the No. 2 chamfer is slidably connected to the No. 1 chamfer.

[0010] By arranging a passing gap between the connecting seats, and arranging a first chamfer and a second chamfer on the sealing ring and the pressing part respectively, the liquid pressure in the straight-through pipe enters the installation gap through the passing gap, and the liquid entering the installation gap provides the sealing ring with pressure toward the pressing part, and the sealing ring is pushed toward the pressing part under the action of the liquid pressure; since the first chamfer and the second chamfer are sliding connections, the sealing ring is squeezed during the connection between the sleeve and the end, and the sealing ring is deformed and squeezes the outer side wall of the straight-through pipe, and the sealing ring further increases the pressure between the sealing ring and the straight-through pipe under the action of the liquid pressure, thereby avoiding the liquid in the straight-through pipe from leaking from the connection between the straight-through pipe and the sealing ring, thereby ensuring the sealing between the sealing ring and the straight-through pipe, and at the same time, the sealing ring is further fitted to the inner side wall of the end under the action of the liquid pressure, thereby avoiding the liquid in the straight-through pipe from leaking from the connection between the end and the sealing ring, thereby ensuring the sealing between the sealing ring and the end, and ensuring the sealing of the connection between the multi-way pipe and the straight-through pipe.

[0011] Preferably, the sealing ring includes an embedded portion, a mounting portion and a deformation portion, the No. 1 chamfer is arranged on the embedded portion, the inner diameter of the embedded portion is 2 to 5 mm smaller than the outer diameter of the straight-through tube, the mounting portion and the deformation portion are both connected to the embedded portion, and the mounting portion and the deformation portion are both arranged at an end away from the No. 1 chamfer, the mounting portion and the deformation portion are both coaxial with the end portion, and the deformation portion is located on the inner side, and a No. 1 pressure gap is provided between the mounting portion and the deformation portion.

[0012] By setting a No. 1 pressure gap in the sealing ring, after the liquid in the straight-through pipe enters the installation gap through the gap, the liquid enters the No. 1 pressure gap, and the liquid pressure acts on the inner side wall of the installation part and the outer side wall of the deformation part respectively. The installation part is further fitted with the inner side wall of the end part under the action of the liquid pressure, thereby preventing the liquid in the straight-through pipe from leaking from the connection between the end part and the sealing ring, thereby ensuring the sealing between the sealing ring and the end part; the deformation part is further fitted with the outer side wall of the straight-through pipe under the action of the liquid pressure, thereby preventing the liquid in the straight-through pipe from leaking from the connection between the straight-through pipe and the sealing ring, thereby ensuring The sealing between the sealing ring and the straight-through pipe is ensured, and the sealing of the connection between the multi-way pipe and the straight-through pipe is guaranteed; at the same time, the liquid pressure in the No. 1 pressure gap acts on the embedded part, pushing the embedded part to move toward the pressing part, increasing the deformation of the embedded part, and further increasing the pressure between the embedded part and the straight-through pipe, avoiding the liquid in the straight-through pipe from leaking from the connection between the straight-through pipe and the multi-way pipe, and ensuring the sealing of the connection between the multi-way pipe and the straight-through pipe; at the same time, the friction between the sealing ring and the straight-through pipe avoids axial relative displacement between the straight-through pipe and the end, and ensures the stability of the connection between the multi-way pipe and the straight-through pipe.

[0013] Preferably, a frame is provided inside the sealing ring, the frame is made of elastic metal material, and the frame extends into the mounting portion and the deformation portion respectively, and the frame is used to provide elastic force to the deformation portion and the mounting portion on both sides inward and outward when the sealing ring is subjected to extrusion pressure.

[0014] In the PVC sewage pipe system, the amount of sewage in the pipe system fluctuates, that is, the amount of sewage is positively correlated with the water consumption, that is, the pressure values ​​of the sewage in the straight pipe and the multi-way pipe fluctuate. When the sewage pressure in the straight pipe and the multi-way pipe drops, the liquid pressure of the sewage entering the No. 1 pressure gap also drops, thereby reducing the pressure between the mounting portion and the end portion, the pressure between the deformation portion and the straight pipe, and further reducing the sealing performance between the sealing ring and the end portion, and the straight pipe; for this reason, a skeleton with a U-shaped cross-section is provided in the sealing ring, and the skeleton has elasticity. When the sewage pressure in the straight pipe and the multi-way pipe drops to the minimum value, the skeleton respectively supports the deformation portion to fit against the outer wall of the straight pipe and the mounting portion to fit against the inner wall of the end portion, thereby ensuring the sealing performance between the sealing ring and the straight pipe, between the sealing ring and the end portion, and ensuring the sealing performance at the connection between the multi-way pipe and the straight pipe.

[0015] Preferably, a second pressure gap is coaxially arranged on the inner wall of the embedded part, and the cross-section of the second pressure gap is a right-angled trapezoidal cross-section, and the bottom side of the right-angled trapezoidal cross-section is located on the inner side, and the right-angled side of the right-angled trapezoidal cross-section is located on the side away from the deformation part.

[0016] Compared with the PVC sewage pipe system, the liquid pressure in the PVC water supply pipe system is more stable and the liquid pressure is relatively high. Therefore, in the water supply management system, a skeleton may not be set in the sealing ring, and the liquid pressure of the liquid in the No. 1 pressure gap will improve the sealing between the sealing ring and the end and the straight pipe; however, when the water is supplied at the moment of water supply in the water supply pipe system or the water hammer effect occurs, the water pressure shock can easily cause the pressure between the embedded part and the straight pipe and the pressed part to rise sharply, which can easily cause the straight pipe to crack, deform or break; for this reason, a No. 2 pressure gap is set on the inner side wall of the embedded part, when a pressure shock occurs in the water supply pipe system, the pressure shock acts on the No. 1 pressure gap, and the No. 2 pressure gap acts as a buffer to reduce The deformation and displacement of the sealing ring can avoid a sharp increase in pressure between the embedded part and the straight tube and the pressed part, thereby ensuring the stability and safety of the connection between the multi-way tube and the straight tube; further, water pressure impact can easily cause the end of the deformation part away from the embedded part to warp, and after entering the No. 2 pressure gap through the gap between the deformation part and the multi-way tube, the water pressure is reduced in the No. 2 gap, and by setting the No. 2 pressure gap as a right-angled trapezoidal cross-section, the water entering the No. 2 pressure gap is guided by the inclined surface, and the water pressure is dispersed to the top surface and the right-angled side of the right-angled trapezoidal cross-section, thereby reducing the impact force in the No. 2 pressure gap, ensuring the stability and safety of the connection between the multi-way tube and the straight tube, and ensuring the sealing of the connection between the multi-way tube and the straight tube.

[0017] Preferably, a support seat is coaxially provided on the end of the connecting seat away from the multi-way tube, the outer wall of the support seat coincides with the outer wall of the connecting seat, the inner wall of the support seat is equal to the outer diameter of the straight-through tube, a No. 3 chamfer is provided on the inner wall of the end of the support seat away from the connecting seat, and a No. 4 chamfer is provided on the outer wall of the end of the deformation portion away from the embedded portion, and the No. 3 chamfer is slidably connected with the No. 4 chamfer.

[0018] By arranging a support seat on the connecting seat, the inner wall of the support seat is fitted with the outer wall of the straight-through tube, and combined with the coaxial constraint of the sleeve on the straight-through tube, the coaxiality of the straight-through tube and the end is guaranteed. At the same time, adhesive is applied at the connection between the support seat and the straight-through tube to improve the connection strength between the straight-through tube and the multi-way tube; further, a third chamfer and a fourth chamfer are respectively arranged on the support seat and the deformation part, and the third chamfer plays a positioning role for the deformation part, thereby avoiding warping of the end of the deformation part away from the embedded part when pressure shock occurs in the straight-through tube and the multi-way tube, thereby ensuring the sealing of the connection between the multi-way tube and the straight-through tube.

[0019] Preferably, a filter screen is provided in the through gap, and the four sides of the filter screen are respectively fixedly connected to the multi-way pipe, the connecting seats on both sides, and the straight-through pipe, and the inner side wall of the filter screen coincides with the inner side wall of the multi-way pipe.

[0020] In the PVC sewage pipe system, the presence of ribbon-shaped, branch-shaped or strip-shaped solids in the sewage cannot be ruled out. If one end of such solids is embedded in the passing gap, they are easily stuck in the passing gap, which can easily cause the accumulation of solids. In addition, the solids are affected by the water flow and will form a lever structure at the passing gap, thereby affecting the connection stability between the straight-through pipe and the multi-way pipe. For this reason, a filter is arranged in the passing gap to prevent debris in the sewage in the straight-through pipe and the multi-way pipe from entering the passing gap, and at the same time prevent solids from accumulating in the multi-way pipe or the straight-through pipe, thereby ensuring the connection stability and passability between the straight-through pipe and the multi-way pipe.

[0021] Preferably, the sealing ring is made of any elastic material including EPDM, FKM or PTFE.

[0022] In a PVC sewage pipe system, the sewage in the sewage pipe system may contain one or more corrosive substances including chemical substances, acidic substances, alkaline substances and organic solvents, and the sewage in the straight pipe and the multi-way pipe can reach the dirty gap through the gap and contact with the sealing ring. For this reason, the sealing ring is preferably made of any one of EPDM, FKM or PTFE to avoid corrosion of the sealing ring; further, for daily sewage pipe systems, EPDM can meet the corrosion resistance requirements, and EPDM is more economical than FKM and PTFE. For non-daily sewage pipes with chemical sewage, FKM or PTFE is preferably used to meet the corrosion resistance against strong acids and strong alkalis.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention arranges the sleeve and the sealing ring, and the inner side wall of the sealing ring fits with the outer side wall of the straight-through pipe. When the adhesive at the connection between the straight-through pipe and the connecting seat and the sleeve becomes brittle, decomposes or the viscosity decreases, the sealing ring in the installation gap squeezes the outer side wall of the straight-through pipe, thereby preventing the liquid in the straight-through pipe from leaking from the connection between the straight-through pipe and the multi-way pipe, thereby ensuring the sealing of the connection between the multi-way pipe and the straight-through pipe; at the same time, the friction between the sealing ring and the straight-through pipe prevents the axial relative displacement between the straight-through pipe and the end, thereby ensuring the stability of the connection between the multi-way pipe and the straight-through pipe.

[0025] 2. The present invention sets a through gap between the connecting seats and sets a No. 1 pressure gap in the sealing ring. The pressure of the liquid in the No. 1 pressure gap acts on the mounting portion and the deformation portion respectively, thereby preventing the liquid in the straight-through pipe from leaking from the connection between the end and the sealing ring, thereby ensuring the sealing between the sealing ring and the end, and at the same time preventing the liquid in the straight-through pipe from leaking from the connection between the straight-through pipe and the sealing ring, thereby ensuring the sealing between the sealing ring and the straight-through pipe, and ensuring the sealing of the connection between the multi-way pipe and the straight-through pipe.

[0026] 3. The present invention ensures the coaxiality of the straight-through tube and the end portion by arranging a support seat on the connecting seat and combining the coaxial constraint of the sleeve on the straight-through tube. A third chamfer and a fourth chamfer are respectively arranged on the support seat and the deformation portion. The third chamfer has a positioning effect on the deformation portion, thereby avoiding warping of the end of the deformation portion away from the embedded portion when pressure shock occurs in the straight-through tube and the multi-way tube, thereby ensuring the sealing of the connection between the multi-way tube and the straight-through tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 An exploded view of a multi-channel PVC pipe fitting of the present invention;

[0028] Figure 2 for Figure 1 Full section view at AA in the middle;

[0029] Figure 3 for Figure 2 A partial enlarged view of point B in the middle;

[0030] Figure 4 for Figure 2 A partial enlarged view of point C in the middle;

[0031] Figure 5 It is a schematic diagram of a half-section structure of the end portion of the multi-way PVC pipe fitting of the present invention;

[0032] Figure 6 It is a structural schematic diagram of another specific embodiment of the multi-way PVC pipe fitting of the present invention;

[0033] Figure 7 for Figure 6 Full section view at the middle DD;

[0034] Figure 8 for Figure 7 A partial enlarged view of point E in the middle;

[0035] Fig. 9 for Figure 7 A magnified partial view of point F in the middle.

[0036] In the figure: 1. multi-way pipe; 11. end; 12. connecting seat; 121. supporting seat; 122. chamfer No. 3; 13. installation gap; 14. passing gap; 2. sealing ring; 21. installation part; 22. deformation part; 221. chamfer No. 4; 23. pressure gap No. 1; 24. embedded part; 241. chamfer No. 1; 242. pressure gap No. 2; 25. skeleton; 3. sleeve; 31. connecting part; 32. pressing part; 321. chamfer No. 2; 33. avoidance groove; 4. straight pipe; 5. filter. DETAILED DESCRIPTION

[0037] See also Figures 1 to 9 The present invention provides a multi-pass PVC pipe, and the technical solution is as follows:

[0038] As an embodiment of the present invention, reference Figures 1 to 5 A multi-way PVC pipe is used in a PVC sewage pipe system, comprising a multi-way pipe 1, the multi-way pipe 1 is provided with four ends 11, the inner diameters of the multiple ends 11 are 220 mm, a straight pipe 4 adapted to the multi-way pipe 1 is sleeved in the end 11, the multiple ends 11 are coaxially provided with a connecting seat 12, one end of the connecting seat 12 is connected to the multi-way pipe 1, and the inner diameter of the connecting seat 12 and the inner diameter of the multi-way pipe 1 are both 200 mm, and the connecting seat 12 An installation gap 13 is provided between the outer wall of the end 11 and the inner wall of the end 11, a sealing ring 2 is coaxially arranged in the installation gap 13, a sleeve 3 is provided on the outer wall of the end 11, the sleeve 3 includes a connecting portion 31 and a pressing portion 32, the connecting portion 31 is threadedly connected to the outer wall of the end 11, the inner diameter of the pressing portion 32 and the outer diameter of the straight-through pipe 4 are both 210 mm, one end of the pressing portion 32 extends into the end 11, and the end of the pressing portion 32 extending into the installation gap 13 abuts against the sealing ring 2, and the connecting portion 31 is threadedly connected to the outer wall of the end 11, and the inner diameter of the pressing portion 32 and the outer diameter of the straight-through pipe 4 are both 210 mm, and one end of the pressing portion 32 extends into the installation gap 13 and abuts against the sealing ring 2, An avoidance groove 33 is provided between the connection portion 31 and the press-in portion 32, and the width of the avoidance groove 33 is the same as the wall thickness of the end portion 11; wherein the sealing ring 2 is made of FKM material, and the sealing ring 2 includes an embedding portion 24, a mounting portion 21 and a deformation portion 22, a first chamfer 241 is provided on the embedding portion 24, and the inner diameter of the embedding portion 24 is 207mm, the mounting portion 21 and the deformation portion 22 are both connected to the embedding portion 24, and the mounting portion 21 and the deformation portion 22 are both provided at one end away from the first chamfer 241 The mounting portion 21 and the deformation portion 22 are both coaxial with the end portion 11, and the deformation portion 22 is located on the inner side. A No. 1 pressure gap 23 is provided between the mounting portion 21 and the deformation portion 22, and the width of the No. 1 pressure gap 23 is 2 mm. A skeleton 25 is provided in the sealing ring 2, and the skeleton 25 is made of elastic metal material, and the skeleton 25 extends into the mounting portion 21 and the deformation portion 22 respectively. The skeleton 25 is used to provide elastic force to the inner and outer sides of the deformation portion 22 and the mounting portion 21 respectively when the sealing ring 2 is subjected to extrusion pressure.

[0039] Furthermore, there are multiple connecting seats 12 in a single end 11, and the multiple connecting seats 12 are evenly distributed around the circumference, and there are gaps 14 between the multiple connecting seats 12, and a filter screen 5 is provided in the gap 14. The four sides of the filter screen 5 are respectively fixedly connected to the multi-way tube 1, the connecting seats 12 on both sides, and the straight tube 4, and the inner wall of the filter screen 5 coincides with the inner wall of the multi-way tube 1; a support seat 121 is coaxially provided on the end of the connecting seat 12 away from the multi-way tube 1, and the outer wall of the support seat 121 coincides with the outer wall of the connecting seat 12, and the inner wall of the support seat 121 Equal to the outer diameter of the straight-through tube 4, a No. 3 chamfer 122 is provided on the inner wall of the end of the support seat 121 away from the connecting seat 12, and a No. 4 chamfer 221 is provided on the outer wall of the end of the deformation portion 22 away from the embedding portion 24, and the No. 3 chamfer 122 is slidably connected with the No. 4 chamfer 221; a No. 1 chamfer 241 is provided at the end of the sealing ring 2 that abuts against the pressing portion 32, and the No. 1 chamfer 241 is located on the outer wall of the sealing ring 2, and a No. 2 chamfer 321 is provided at the end of the pressing portion 32 extending into the end portion 11, and the No. 2 chamfer 321 is slidably connected with the No. 1 chamfer 241.

[0040] As another embodiment of the present invention, refer to Figures 6 to 9, which is different from the previous specific embodiment, the multi-way PVC pipe is used in the PVC water supply pipeline system, including a multi-way pipe 1, the multi-way pipe 1 is provided with four ends 11, the inner diameter of the multiple ends 11 is 118mm, and the straight pipe 4 adapted to the multi-way pipe 1 is sleeved in the end 11, and the multiple ends 11 are coaxially provided with a connecting seat 12, one end of the connecting seat 12 is connected to the multi-way pipe 1, and the inner diameter of the connecting seat 12 and the inner diameter of the multi-way pipe 1 are both 100mm, and the connecting seat 12 is connected to the multi-way pipe 1. An installation gap 13 is provided between the outer wall of the socket 12 and the inner wall of the end 11, a sealing ring 2 is coaxially provided in the installation gap 13, a sleeve 3 is provided on the outer wall of the end 11, the sleeve 3 includes a connecting portion 31 and a pressing portion 32, the connecting portion 31 is threadedly connected to the outer wall of the end 11, the inner diameter of the pressing portion 32 and the outer diameter of the straight-through pipe 4 are both 108 mm, one end of the pressing portion 32 extends into the end 11, and the end of the pressing portion 32 extending into the installation gap 13 is in contact with the sealing ring 2 abuts, and an avoidance groove 33 is provided between the connecting portion 31 and the pressing portion 32, and the width of the avoidance groove 33 is the same as the wall thickness of the end portion 11; wherein, the sealing ring 2 is made of FKM material, and the sealing ring 2 includes an embedding portion 24, a mounting portion 21 and a deformation portion 22, a first chamfer 241 is provided on the embedding portion 24, and the inner diameter of the embedding portion 24 is 105mm, the mounting portion 21 and the deformation portion 22 are both connected to the embedding portion 24, and the mounting portion 21 and the deformation portion 22 are both provided away from the first chamfer At one end of 241, the mounting portion 21 and the deformation portion 22 are coaxial with the end portion 11, and the deformation portion 22 is located on the inner side, and a No. 1 pressure gap 23 is provided between the mounting portion 21 and the deformation portion 22, and the width of the No. 1 pressure gap 23 is 2 mm; a No. 2 pressure gap 242 is coaxially provided on the inner wall of the embedded portion 24, and the cross-section of the No. 2 pressure gap 242 is a right-angled trapezoidal cross-section, and the bottom side of the right-angled trapezoidal cross-section is located on the inner side, and the right-angled side of the right-angled trapezoidal cross-section is located on the side away from the deformation portion 22.

[0041] Furthermore, there are multiple connecting seats 12 in a single end 11, and the multiple connecting seats 12 are evenly distributed around the circumference, and there are gaps 14 between the multiple connecting seats 12, and a filter screen 5 is provided in the gap 14. The four sides of the filter screen 5 are respectively fixedly connected to the multi-way tube 1, the connecting seats 12 on both sides, and the straight tube 4, and the inner wall of the filter screen 5 coincides with the inner wall of the multi-way tube 1; a support seat 121 is coaxially provided on the end of the connecting seat 12 away from the multi-way tube 1, and the outer wall of the support seat 121 coincides with the outer wall of the connecting seat 12, and the inner wall of the support seat 121 Equal to the outer diameter of the straight-through tube 4, a No. 3 chamfer 122 is provided on the inner wall of the end of the support seat 121 away from the connecting seat 12, and a No. 4 chamfer 221 is provided on the outer wall of the end of the deformation portion 22 away from the embedding portion 24, and the No. 3 chamfer 122 is slidably connected with the No. 4 chamfer 221; a No. 1 chamfer 241 is provided at the end of the sealing ring 2 that abuts against the pressing portion 32, and the No. 1 chamfer 241 is located on the outer wall of the sealing ring 2, and a No. 2 chamfer 321 is provided at the end of the pressing portion 32 extending into the end portion 11, and the No. 2 chamfer 321 is slidably connected with the No. 1 chamfer 241.

[0042] During installation, insert the sealing ring 2 into the installation gap 13, and then pre-tighten the sleeve 3 and the end 11, and then apply adhesive on the inner wall of the support seat 121, the inner wall of the sealing ring 2, the inner wall of the sleeve 3 and the outer wall of the straight-through tube 4, and insert the straight-through tube 4 into the end 11 before the adhesive solidifies, until the end 11 of the straight-through tube 4 abuts against the connecting seat 12, tighten the sleeve 3 until the first chamfer 241 fits with the second chamfer 321, the third chamfer 122 and the fourth chamfer 221, and then rotate the sleeve 30.5 to 1 circle in the tightening direction. After the adhesive solidifies, the connection between a straight-through tube 4 and the multi-way tube 1 is completed, and the connection between the remaining ends 11 and the straight-through tubes 4 is consistent with the above steps, which will not be repeated here.

[0043] The above two specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A multi-way PVC pipe, comprising a multi-way pipe (1), wherein the multi-way pipe (1) is provided with at least three end portions (11), wherein the inner diameters of the end portions (11) are all larger than the inner diameter of the multi-way pipe (1), and a straight pipe (4) adapted to the multi-way pipe (1) is coaxially sleeved in the end portions (11), characterized in that: A connecting seat (12) is coaxially arranged in each of the plurality of end portions (11), one end of the connecting seat (12) is connected to the multi-way tube (1), and the inner diameter of the connecting seat (12) is equal to the inner diameter of the multi-way tube (1), an installation gap (13) is arranged between the outer wall of the connecting seat (12) and the inner wall of the end portion (11), a sealing ring (2) is coaxially arranged in the installation gap (13), a sleeve (3) is arranged on the outer wall of the end portion (11), the sleeve (3) comprises a connecting portion (31) and a pressing portion (32), the connecting portion (31) is threadedly connected to the outer wall of the end portion (11), the inner diameter of the pressing portion (32) is equal to the outer diameter of the straight-through tube (4), one end of the pressing portion (32) extends into the end portion (11), and the end of the pressing portion (32) extending into the installation gap (13) abuts against the sealing ring (2).

2. A multi-pass PVC pipe according to claim 1, characterized in that: There are a plurality of connection seats (12) in the single end (11), the plurality of connection seats (12) are evenly distributed around the circumference, and gaps (14) are provided between the plurality of connection seats (12). One end of the sealing ring (2) abutting against the press-in portion (32) is provided with a first chamfer (241), and the first chamfer (241) is located on the outer wall of the sealing ring (2). One end of the press-in portion (32) extending into the end (11) is provided with a second chamfer (321), and the second chamfer (321) is slidably connected to the first chamfer (241).

3. A multi-pass PVC pipe according to claim 2, characterized in that: The sealing ring (2) comprises an embedding portion (24), a mounting portion (21) and a deformation portion (22); the first chamfer (241) is arranged on the embedding portion (24); the inner diameter of the embedding portion (24) is 2 to 5 mm smaller than the outer diameter of the straight-through pipe (4); the mounting portion (21) and the deformation portion (22) are both connected to the embedding portion (24); the mounting portion (21) and the deformation portion (22) are both arranged at an end away from the first chamfer (241); the mounting portion (21) and the deformation portion (22) are both coaxial with the end portion (11); the deformation portion (22) is located on the inner side; and a first pressure gap (23) is provided between the mounting portion (21) and the deformation portion (22).

4. A multi-pass PVC pipe according to claim 3, characterized in that: A frame (25) is provided inside the sealing ring (2), the frame (25) being made of an elastic metal material, and the frame (25) respectively extending into the mounting portion (21) and the deformation portion (22), and the frame (25) is used to provide elastic forces to the deformation portion (22) and the mounting portion (21) towards the inside and outside when the sealing ring (2) is subjected to an extrusion force.

5. The multi-pass PVC pipe according to claim 3, characterized in that: A second pressure gap (242) is coaxially arranged on the inner side wall of the embedded portion (24), and the cross section of the second pressure gap (242) is a right-angled trapezoidal cross section, wherein the bottom side of the right-angled trapezoidal cross section is located on the inner side, and the right-angled side of the right-angled trapezoidal cross section is located on the side away from the deformation portion (22).

6. A multi-pass PVC pipe according to claim 4 or 5, characterized in that: A support seat (121) is coaxially arranged on one end of the connecting seat (12) away from the multi-way tube (1); the outer wall of the support seat (121) coincides with the outer wall of the connecting seat (12); the inner wall of the support seat (121) is equal to the outer diameter of the straight-through tube (4); a third chamfer (122) is arranged on the inner wall of the end of the supporting seat (121) away from the connecting seat (12); a fourth chamfer (221) is arranged on the outer wall of the end of the deforming portion (22) away from the embedding portion (24); and the third chamfer (122) is slidably connected to the fourth chamfer (221).

7. The multi-pass PVC pipe according to claim 2, characterized in that: A filter screen (5) is provided in the through gap (14), and the four sides of the filter screen (5) are respectively fixedly connected to the multi-way pipe (1), the connecting seats (12) on both sides, and the straight pipe (4), and the inner side wall of the filter screen (5) overlaps with the inner side wall of the multi-way pipe (1).

8. The multi-pass PVC pipe according to claim 1, characterized in that: The sealing ring (2) is made of any elastic material including EPDM, FKM or PTFE.

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