High-strength flame-retardant polyvinyl chloride pipe

Abstract

The high-strength flame-retardant polyvinyl chloride pipe comprises two pipe bodies and a fixing assembly used for fixing the two pipe bodies, the fixing assembly comprises a sleeve with an opening in one end and a sliding block slidably connected into the opening end of the sleeve, a semi-cylindrical groove is formed in the inner bottom of the sleeve, the groove penetrates through the sleeve, and the sleeve is sleeved with the sliding block. The extending direction of the groove is perpendicular to the length direction of the sleeve; semicircular notches are formed in the two opposite side walls of the sleeve, the notches and the ends of the grooves form a circle, and the circle is equal to the outer diameter of the pipe body. A semi-cylindrical fixing groove is formed in the end, facing the groove, of the sliding block, the section of the fixing groove and the section of the groove form a circle, a fastener used for fixing the sliding block is arranged on the sleeve, and the two pipe bodies are detachably connected between the groove and the fixing groove. According to the polyvinyl chloride pipe, it can be ensured that the connecting position is consistent with the pipe diameter of the pipe body.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipe material technical field, especially relate to a high strength flame -retardant polyvinyl chloride pipe. BACKGROUND

[0002] The high strength flame -retardant polyvinyl chloride pipe is a high-performance new type pipe formed by advanced processing technology extrusion by using high molecular weight polymer composite blending modification and adding flame retardant, wherein the hard high strength flame -retardant polyvinyl chloride pipe has high strength and hardness, excellent flame -retardant performance, good corrosion resistance, long service life, strong fluid conveying capacity and other characteristics, and is widely used.

[0003] The relatively original connecting mode of the hard polyvinyl chloride pipe is to connect two pipe bodies by using glue, but this connecting mode has the problem of unstable connection. In order to solve this problem, the patent with the authorization announcement number "CN 221196520 U" discloses a chlorinated polyvinyl chloride pipe material with a leakage prevention function, which comprises a left pipe, a connecting piece A, a filling groove and a slot, the outer side of the left pipe is provided with the connecting piece A, the inside of the connecting piece A is provided with the filling groove, the inside of the filling groove is embedded with a connecting ring, the outer side of the connecting ring is sleeved with a sealing ring, one side of the connecting ring is connected with a connecting piece B, the inside of the connecting ring is provided with an inner pipe, the inside of the connecting piece B is connected with a right pipe, the utility model fills the sealing glue into the inside of the filling groove through the glue inlet pipe, the sealing glue flows to fill the gap between the filling groove and the connecting ring and the sealing ring, the sealing glue coagulates, the sealing property between the left pipe and the right pipe is improved, the leakage is avoided, the pipe material is not affected by temperature due to good temperature insulation performance. This mode realizes the firmness and sealing property of pipe body connection, but the inner pipe is arranged in the pipe body, so that the flow path at the connecting position is narrow relative to the pipe body, which is easy to cause blockage, and after the flow path is narrowed, the liquid flow rate at this position is increased, thereby generating inward suction force, which is easy to cause local deformation of the connecting position, and affects the sealing property and stability of the connection. SUMMARY

[0004] The utility model intends to provide a high strength flame -retardant polyvinyl chloride pipe to solve the problems in the background art.

[0005] The high-strength flame-retardant PVC pipe in the scheme comprises two pipe bodies and a fixing assembly for fixing the two pipe bodies, the fixing assembly comprises a sleeve with an open end and a sliding block slidingly connected in the open end of the sleeve, the inner bottom of the sleeve is provided with a semicylindrical groove, the groove penetrates through the sleeve, the extension direction of the groove is perpendicular to the length direction of the sleeve, semicircular notches are arranged on the opposite two side walls of the sleeve, the notches and the end of the groove form a circle, and the circle is equal to the outer diameter of the pipe body, the end of the sliding block facing the groove is provided with a semicylindrical fixing groove, the cross section of the fixing groove and the groove forms a circle, fasteners for fixing the sliding block are arranged on the sleeve, and the two pipe bodies are detachably connected between the groove and the fixing groove.

[0006] The working principle and beneficial effects of the scheme are as follows: when the two pipe bodies are connected, one end of each pipe body is placed in the groove of the sleeve through the notches and the groove, respectively, and is abutted and placed in the sliding block, the fixing groove of the sliding block is buckled on the pipe body, the outer diameter of the pipe body is adapted to the circle formed by the groove and the fixing groove, and then the sliding block is fixed by using the fasteners, so that the two pipe bodies are firmly connected together. The sleeve and the sliding block are combined to connect the two pipe bodies, compared with the traditional glue connection mode, the connection is more firm and reliable, the connection problems caused by aging or poor adhesion of the glue are avoided, and the problems such as narrow flow path, easy blockage and deformation of the connection in the prior art caused by the setting of the inner pipeline are overcome, so that the stable connection of the pipe body and the normal fluid conveying function are ensured.

[0007] Further, the fastener is a fastening cover, a threaded segment is arranged on the outer wall of the open end of the sleeve, and the fastening cover is threadedly connected on the threaded segment. The sliding block is fixed and loosened by rotating, so that the fixing and loosening of the pipe body by the sliding block are realized, and the work efficiency is improved.

[0008] Further, the length of the sliding block is less than the length of the open end of the sleeve, a top block for abutting against the sliding block is fixedly connected to the inner bottom of the fastening cover, and the sum of the length of the top block and the length of the sliding block is greater than the length of the open end of the sleeve. The sliding block can be controlled to descend or separate from the pipe body by rotating the fastening cover to drive the top block.

[0009] Further, the length of the sliding block is greater than the length of the open end of the sleeve, and one end of the sliding block away from the groove abuts against the inner bottom of the fastening cover. The sliding block can be controlled to descend or separate from the pipe body by rotating the fastening cover.

[0010] Further, annular limiting rings are integrally formed on the outer walls of the two pipe bodies, limiting grooves matched with the limiting rings are arranged on the sleeve and the sliding block, and a relief groove for the pipe body and the limiting ring to pass through is arranged on the wall of the open end of the sleeve. During the operation of the pipeline system, due to factors such as fluid flow, temperature change or external vibration, the pipe body may produce axial movement, and the limiting rings on the outer walls of the pipe bodies and the limiting grooves on the sleeve and the sliding block are matched with each other, so that the axial movement of the pipe body after connection is limited.

[0011] Further, the connecting part of the two pipe bodies is sleeved with a sealing ring, the sleeve and the sliding block are both provided with a sealing groove for the sealing ring to pass through. The sealing ring is extruded and deformed in the sealing groove, filling the small gap between the pipe body and the fixing assembly, forming a reliable sealing barrier, ensuring the sealing of the pipeline system.

[0012] Further, the opposite ends of the two pipe bodies are both provided with a necking for sleeving the sealing ring. The necking facilitates the sleeving and positioning of the sealing ring, and can also protect the sealing ring from displacement or damage caused by external force during installation or use. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a structural schematic view of a high-strength flame-retardant PVC pipe according to an embodiment of the present application;

[0014] Figure 2 FIG. 2 is a left view of the fixing assembly in FIG. 1; Figure 1

[0015] Figure 3 FIG. 3 is an A-A sectional view of the sleeve in FIG. 1; Figure 2

[0016] Figure 4 FIG. 4 is a structural schematic view of a high-strength flame-retardant PVC pipe according to another embodiment of the present application;

[0017] Figure 5 FIG. 5 is a structural schematic view of a high-strength flame-retardant PVC pipe according to still another embodiment of the present application. DETAILED DESCRIPTION

[0018] The following will be further described in detail through specific embodiments:

[0019] The reference signs in the drawings of the specification include: pipe body 1, sleeve 2, sliding block 3, top block 4, fastening cover 5, notch 6, recess 7, opening 8, limiting ring 9, avoiding groove 10, sealing ring 11.

[0020] Embodiment 1 is basically as shown in the accompanying drawings Figures 1 to 3 ​​The utility model provides a high-strength flame-retardant PVC pipe, which comprises two pipe bodies 1 and a fixing assembly for fixing the two pipe bodies 1, wherein the fixing assembly comprises a sleeve 2 with an open end 8 and a sliding block 3 connected to the open end 8 of the sleeve 2, the open end 8 of the sleeve 2 is circular, the length direction of the open end 8 is consistent with the length direction of the sleeve 2, the inner bottom of the sleeve 2 is provided with a semicylindrical groove 7, the groove 7 penetrates through the sleeve 2, the extension direction of the groove 7 is perpendicular to the length direction of the sleeve 2, the opposite two side walls of the sleeve 2 are each provided with a semicircular notch 6, the notch 6 and the end of the groove 7 form a circle, and the circle is equal to the outer diameter of the pipe body 1, the sliding block 3 is cylindrical, the length of the sliding block 3 is less than the length of the open end 8 of the sleeve 2, the end of the sliding block 3 facing the groove 7 is provided with a semicylindrical fixing groove, the fixing groove and the groove 7 form a circle in cross section, the sleeve 2 is provided with a fastener for fixing the sliding block 3, the fastener is a fastening cover 5, the outer wall of the open end 8 of the sleeve 2 is provided with a threaded section, the fastening cover 5 is threadedly connected to the threaded section, the inner bottom of the fastening cover 5 is integrally formed with a top block 4 for abutting against the sliding block 3, and the sum of the lengths of the top block 4 and the sliding block 3 is greater than the length of the open end 8 of the sleeve 2, the opposite ends of the two pipe bodies 1 enter the sleeve 2 through the notch 6 and the groove 7 and abut against each other, and the fixing groove of the sliding block 3 is buckled on the top of the pipe body 1.

[0021] Embodiment 2 is basically as shown in the accompanying drawings, and the difference from embodiment 1 is that the outer wall of each of the two pipe bodies 1 is integrally formed with an annular limiting ring 9, and the sleeve 2 and the sliding block 3 are each provided with a limiting groove for cooperating with the limiting ring 9, and the wall of the open end 8 of the sleeve 2 is provided with an avoiding groove 10 for the pipe body 1 and the limiting ring 9 to pass through. Figure 4 Embodiment 3 is basically as shown in the accompanying drawings, and the difference from embodiment 2 is that the opposite ends of the two pipe bodies 1 are each provided with a necking, and the same sealing ring 11 is sleeved on the two neckings, the sleeve 2 and the sliding block 3 are each provided with a sealing groove for the sealing ring 11 to pass through, and the outer diameter of the sealing ring 11 is less than the outer diameter of the limiting ring 9.

[0022] Figure 5 Specific implementation process is as follows: when connecting the two pipe bodies 1, first, the sealing ring 11 is sleeved on the necking of the opposite end of each of the two pipe bodies 1, so as to ensure that the sealing ring 11 is firmly installed and accurately positioned, the sealing ring 11 can be well positioned and fixed at the necking, and displacement of the sealing ring 11 in the subsequent installation process is prevented.

[0023] Then, the two pipe bodies 1 are placed into the sleeve 2 through the avoiding groove 10, so that the two pipe bodies 1 abut against each other in the sleeve 2, and at this time, the limiting ring 9 on the pipe body 1 is also aligned with the limiting groove on the sleeve 2.

[0024]

[0025] ​​Then, the slider 3 is put into the opening 8 end of the sleeve 2, the fixing groove of the slider 3 is buckled on the pipe body 1, the fastening cover 5 is screwed on the outer wall threaded section of the opening 8 end of the sleeve 2, the top block 4 in the bottom of the fastening cover 5 gradually moves downward with the rotation of the fastening cover 5, because the sum of the length of the top block 4 and the slider 3 is greater than the length of the opening 8 end of the sleeve 2, the top block 4 pushes the slider 3 to move further to the pipe body 1 direction, so that the slider 3 is more tightly fixed on the pipe body 1, thereby firmly connecting the two pipe bodies 1 together. At this time, the outer diameter of the pipe body 1 is closely matched with the circular formed by the groove 7 and the fixing groove, the preliminary fixation of the pipe body 1 is realized, the limiting ring 9 is just fixed between the limiting grooves of the sleeve 2 and the slider 3, and the sealing ring 11 is fixed between the sealing grooves of the sleeve 2 and the slider 3. At the same time, the sealing grooves on the sleeve 2 and the slider 3 extrude the sealing ring 11, so that the sealing ring 11 is deformed and fills the small gap between the pipe body 1 and the fixing assembly, a reliable sealing structure is formed, the sealing property of the pipeline connection is ensured, and fluid leakage is prevented.

[0026] The above is only the embodiment of the present application, and the well-known specific structure and characteristics in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A high-strength flame-retardant polyvinyl chloride pipe, comprising two pipe bodies and a fixing assembly for fixing the two, characterized in that: The fixing assembly includes a sleeve with one open end and a slider slidably connected inside the open end of the sleeve. The inner bottom of the sleeve has a semi-cylindrical groove that penetrates the sleeve and extends perpendicularly to the length direction of the sleeve. Semi-circular notches are provided on opposite side walls of the sleeve, and the notches and the ends of the grooves form a circle, which is equal to the outer diameter of the tube. The slider has a semi-cylindrical fixing groove at the end facing the groove, and the cross-section of the fixing groove and the groove forms a circle. Fasteners for fixing the slider are provided on the sleeve. The two tubes are detachably connected between the groove and the fixing groove.

2. The high-strength flame-retardant polyvinyl chloride pipe according to claim 1, characterized in that: The fastener is a fastening cap, and the outer wall of the sleeve opening end is provided with a threaded section, and the fastening cap is threadedly connected to the threaded section.

3. The high-strength flame-retardant polyvinyl chloride pipe according to claim 2, characterized in that: The length of the slider is less than the length of the sleeve opening end. A top block for supporting the slider is fixedly connected to the inner bottom of the fastening cover. The sum of the lengths of the top block and the slider is greater than the length of the sleeve opening end.

4. A high-strength flame-retardant polyvinyl chloride pipe according to claim 2, characterized in that: The length of the slider is greater than the length of the sleeve opening end, and the end of the slider away from the groove abuts against the inner bottom of the fastening cover.

5. A high-strength flame-retardant polyvinyl chloride pipe according to claim 3 or 4, characterized in that: Both tubes have an integrally formed annular limiting rings on their outer walls. The sleeve and the slider are provided with limiting grooves that cooperate with the limiting rings. The sleeve opening end wall is provided with a clearance groove for the tube and the limiting ring to pass through.

6. A high-strength flame-retardant polyvinyl chloride pipe according to claim 5, characterized in that: A sealing ring is fitted at the connection between the two tubes, and both the sleeve and the slider are provided with sealing grooves for the sealing ring to pass through.

7. A high-strength flame-retardant polyvinyl chloride pipe according to claim 6, characterized in that: Both of the two tubes have a constricted end for fitting a sealing ring.

Images