Compression-resistant flange type FRPP (Fiber Reinforced Polypropylene) mute drainage vertical inspection pipe fitting

Abstract

The utility model provides a compression-resistant flange type FRPP mute drainage vertical inspection pipe fitting. The compression-resistant flange type FRPP mute drainage vertical inspection pipe fitting comprises a vertical pipe, a flange connecting part used as an inspection opening, a flange gland connected with a flange corresponding to the flange connecting part, and a first sealing ring. The flange connecting part is correspondingly connected to the pipe wall of the vertical pipe and communicates with the vertical pipe. The flange gland comprises a gland body and a positioning boss arranged on the corresponding face of the gland body, and the positioning boss is used for being inserted into the flange connecting part. The first sealing ring is used for being arranged on the outer wall of the positioning boss in a sleeving mode. The inner edge of a port of the flange connecting part is of a horn mouth structure to form a first guide inclined face. And the first sealing ring is provided with an extrusion inclined surface matched with the first guide inclined surface. The compression-resistant flange type FRPP silent drainage vertical inspection pipe fitting provided by the utility model has a good sealing effect, and the leakage condition can be avoided.

Description

Technical Field

[0001] This application relates to the technical field of water supply and drainage, and particularly to a compression-resistant flange-type FRPP silent drainage vertical inspection pipe fitting. Background Art

[0002] Vertical drainage pipe fittings are widely installed in various buildings for discharging rainwater, snowmelt water, and domestic sewage collected from the top of the building. To facilitate the cleaning of dirt and the like inside the pipe, inspection openings are usually provided on the pipe wall of the vertical drainage pipe for cleaning blockages such as dirt when the pipe is blocked.

[0003] Existing vertical drainage pipe fittings generally include a riser pipe, an inspection opening provided on the pipe wall of the riser pipe, a flange connection plate provided at the inspection opening, and a flange gland for cooperating with the flange connection plate to block the inspection opening. When installing the flange gland, bolts sequentially pass through the installation holes on the flange gland and the corresponding installation holes on the flange connection plate, and then the nuts are tightened to complete the installation of the flange gland. However, the sealing at the inspection opening of the existing vertical drainage pipe fittings is formed by two mutually contacting planes of the flange gland and the flange connection plate squeezing a flange gasket. This sealing method relies on the squeezing force formed by the cooperation of bolts and nuts, and its sealing effect is not good, easily causing sewage leakage. Therefore, there is an urgent need for a vertical drainage pipe fitting with good sealing to solve the above problems.

[0004] The information disclosed in this background art section is only for enhancing the understanding of the background art of the present disclosure, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0005] In view of the above problems, a compression-resistant flange-type FRPP silent drainage vertical inspection pipe fitting is provided, which has a good sealing effect and can avoid leakage.

[0006] Specifically, this application provides a compression-resistant flange-type FRPP silent drainage vertical inspection pipe fitting, including a riser pipe, a flange connection part serving as an inspection opening, a flange gland flange-connected corresponding to the flange connection part, and a first sealing ring; the flange connection part is correspondingly connected to the pipe wall of the riser pipe and is communicated with the riser pipe; the flange gland includes a gland body and a positioning boss provided on the corresponding surface of the gland body, and the positioning boss is used for inserting into the flange connection part; the first sealing ring is used for sleeving on the outer wall of the positioning boss; the inner edge of the port of the flange connection part is in a flared structure to form a first guiding inclined surface; the first sealing ring is provided with a squeezing inclined surface for cooperating with the first guiding inclined surface.

[0007] Optionally, an annular groove is provided at the inner wall of the flange connection part, and a second sealing ring is embedded in the annular groove; a second guiding inclined surface or an arc surface for cooperating with the second sealing ring is provided at the outer edge of the end of the positioning boss.

[0008] Optionally, the depth of the annular groove from the port of the flange connection part is less than the height of the positioning boss.

[0009] Optionally, the central axis of the positioning boss coincides with the center of the flange gland.

[0010] Optionally, the flange gland is fixed to the corresponding open end of the flange connection part by bolts and nuts.

[0011] Optionally, the outer edge contours of the flange connection part and the flange gland are both rectangular; mounting grooves for limiting the bolts are respectively provided on the sides of each corner of the flange connection part close to the riser pipe and matching the contour of the bolt head.

[0012] Optionally, the flange connection part includes an installation cylinder for communicating with the riser pipe and an annular installation plate connected to the outer end of the installation cylinder; an annular rib plate is arranged along the circumferential direction of the outer wall of the installation cylinder, and a longitudinal rib plate is arranged along the axial direction of the installation cylinder.

[0013] Optionally, the riser pipe, the flange connection part and the flange gland are all made of FRPP.

[0014] In the compression-resistant flange-type FRPP silent drainage riser inspection pipe fitting of the present application, since the inner edge of the port of the flange connection part is in a flared structure, the flange gland drives the first sealing ring to move and forms extrusion with the first guiding inclined surface and the positioning boss. As the extrusion force increases, the first sealing ring presses tightly against the positioning boss and the first guiding inclined surface, and fills the gap between the first guiding inclined surface and the positioning boss, playing a good sealing role. And because the cooperation of bolts and nuts can generate a large pressing force, the sealing performance of the drainage riser inspection pipe fitting is further enhanced, preventing the situation of poor sealing and sewage leakage.

[0015] Those skilled in the art will understand the above and other purposes, advantages and features of the present application more clearly according to the following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of the compression-resistant flange-type FRPP silent drainage riser inspection pipe fitting in the embodiment of the present application.

[0017] Figure 2 It is a schematic exploded view of the compression-resistant flange-type FRPP silent drainage riser inspection pipe fitting in the embodiment of the present application.

[0018] Figure 3 This is a schematic front view of the compression flange type FRPP silent drainage vertical inspection pipe fitting in the embodiment of the present application.

[0019] In each of the above figures, 100 is the compression flange type FRPP silent drainage vertical inspection pipe fitting, 110 is the vertical pipe, 120 is the flange connection part, 121 is the first guiding inclined surface, 122 is the annular groove, 123 is the installation groove, 124 is the installation cylinder, 125 is the annular installation plate, 126 is the annular rib plate, 127 is the longitudinal rib plate, 130 is the flange gland, 131 is the gland body, 132 is the positioning boss, 140 is the first sealing ring, 141 is the extrusion inclined surface, 150 is the second sealing ring, 161 is the bolt, and 162 is the nut. Specific embodiments

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. The "first", "second", etc. involved in the present application are used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" involved in the present application, unless otherwise specified, both include direct and indirect connections (couplings).

[0021] Figure 1 This is a schematic cross-sectional view of the compression flange type FRPP silent drainage vertical inspection pipe fitting in the embodiment of the present application. As Figure 1 shown, and referring to Figure 2 and Figure 3 The embodiment of the present application provides a compression flange type FRPP silent drainage vertical inspection pipe fitting 100, which includes a vertical pipe 110, a flange connection part 120 used as an inspection port, a flange gland 130 corresponding to the flange connection of the flange connection part 120, and a first sealing ring 140. The flange connection part 120 is correspondingly connected to the pipe wall of the vertical pipe 110 and is communicated with the vertical pipe 110. The flange gland 130 is fixed to the corresponding open end of the flange connection part 120 through bolts 161 and nuts 162. The flange gland 130 includes a gland body 131 and a positioning boss 132 provided on the corresponding surface of the gland body 131. The positioning boss 132 is used to insert into the flange connection part 120. The first sealing ring 140 is used to sleeved on the outer wall of the positioning boss 132. The outer edge of the port of the flange connection part 120 is in a flared structure to form a first guiding inclined surface 121. The first sealing ring 140 is provided with an extrusion inclined surface 141 that cooperates with the first guiding inclined surface 121.

[0022] In the anti-pressure flange-type FRPP silent drainage vertical inspection pipe fitting 100 according to the embodiment of the present application, the installation process of the flange gland 130 is as follows: First, the first sealing ring 140 is sleeved on the positioning boss 132 of the flange gland 130. Secondly, the flange gland 130 and the first sealing ring 140 are inserted into the flange connection part 120 together. Then, the bolt 161 is inserted into the corresponding installation holes of the flange gland 130 and the flange connection part 120. Finally, the nut 162 is tightened.

[0023] In the anti-pressure flange-type FRPP silent drainage vertical inspection pipe fitting 100 of the present application, since the inner edge of the port of the flange connection part 120 is in a flared structure, the flange gland 130 drives the first sealing ring 140 to move and form extrusion with the first guiding inclined surface 121 and the positioning boss 132. As the extrusion force increases, the first sealing ring 140 presses tightly against the positioning boss 132 and the first guiding inclined surface 121, and fills the gap between the first guiding inclined surface 121 and the positioning boss 132, playing a good sealing role. And because the bolt 161 and the nut 162 cooperate to generate a large pressing force, the sealing performance of the drainage vertical inspection pipe fitting 100 is further enhanced, preventing the situation of poor sealing and sewage leakage.

[0024] In some embodiments of the present application, such as Figure 1 and Figure 2 shown, an annular groove 122 is provided on the inner wall of the flange connection part 120, and a second sealing ring 150 is embedded in the annular groove 122. A second guiding inclined surface or an arc surface that cooperates with the second sealing ring 150 is provided on the outer edge of the end of the positioning boss 132.

[0025] In the embodiment of the present application, when the flange gland 130 is inserted into the flange connection part 120, the positioning boss 132 cooperates with the second sealing ring 150 to form a seal, and is used together with the first sealing ring 140 to play a dual-sealing role, thereby making the sealing effect better. And because the end of the positioning boss 132 is provided with a second guiding inclined surface or an arc surface, it plays a guiding role and is convenient for the insertion of the positioning boss 132.

[0026] In some embodiments of the present application, such as Figure 1 and Figure 2 shown, the depth of the annular groove 122 from the port of the flange connection part 120 is less than the height of the positioning boss 132. Such a setting makes the positioning boss 132 insert deeper into the flange connection part 120, and thus the sealing effect of the cooperation between the positioning boss 132 and the second sealing ring 150 is better.

[0027] In some embodiments of the present application, such as Figure 1 and Figure 2As shown, the central axis of the positioning boss 132 coincides with the center of the flange gland 130. That is to say, the positioning boss 132 is located at the central position of the flange gland 130.

[0028] In some embodiments of the present application, as Figures 1 to 3 shown, the outer edge contours of the flange connection part 120 and the flange gland 130 both correspond to rectangles, for example, they can be squares. Installation grooves 123 for limiting the bolt 161 are respectively provided on the sides of each corner of the flange connection part 120 close to the vertical pipe 110, and the shapes of the installation grooves 123 match the contour of the head of the bolt 161.

[0029] In the embodiments of the present application, the bolt 161 penetrates from the side of the flange connection part 120 close to the vertical pipe 110, and the head of the bolt 161 is arranged in the installation groove 123, then the bolt 161 passes through the corresponding installation holes on the flange gland 130, and finally the nut 162 is tightened to complete the installation. In the present application, since the installation position of the nut 162 moves from the space between the vertical pipe 110 and the flange connection part 120 to the front side of the flange connection part 120, the nut 162 has sufficient installation space, which is convenient for using an installation tool to screw the nut 162, so it is convenient for the installation and disassembly of the flange gland 130. And the shape of the installation groove 123 in the present application matches the shape of the head of the bolt 161, which can limit the bolt 161 and prevent the bolt 161 from rotating axially when the nut 162 is screwed.

[0030] In some embodiments of the present application, as Figure 1 and Figure 2 shown, the flange connection part 120 includes an installation cylinder 124 for communicating with the vertical pipe 110 and an annular installation plate 125 connected to the outer end of the installation cylinder 124. An annular rib plate 126 is arranged along the circumferential direction of the outer wall of the installation cylinder 124, and a longitudinal rib plate 127 is arranged along the axial direction of the installation cylinder 124. In the embodiments of the present application, the blockage in the vertical pipe 110 can be discharged through the installation cylinder 124, and the installation cylinder 124 also plays a role in connecting the vertical pipe 110 and the annular installation plate 125. The annular rib plate 126 and the longitudinal rib plate 127 on the outer wall of the installation cylinder 124 can enhance the structural strength of the installation cylinder 124, and thus can prevent the flange connection part 120 from being damaged after long-term use.

[0031] In some embodiments of the present application, the vertical pipe 110, the flange connection part 120 and the flange gland 130 are all made of FRPP. In the present application, FRPP (fiberglass-reinforced polypropylene pipe) is a glass fiber-modified polypropylene material treated with a coupling agent, which has the advantages of corrosion resistance, high temperature resistance, high pressure resistance, hygiene and non-toxicity, recyclability, relatively excellent impact resistance and tensile strength, light weight, convenient installation and maintenance, etc., and is suitable for the transportation of industrial corrosive liquids (such as acid and alkali liquids) and water supply and drainage systems, etc.

[0032] Although some preferred embodiments of the present application have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present application.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of its inventive concept. Thus, if these modifications and variations to the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A compression-resistant flange type FRPP silent drainage vertical inspection pipe fitting, characterized in that: It comprises a standpipe, a flange connection part used as an inspection port, a flange gland corresponding to the flange connection part, and a first sealing ring; the flange connection part is correspondingly connected to the pipe wall of the standpipe and communicates with the standpipe; The flange gland includes a gland body and a positioning boss arranged at the corresponding surface of the gland body, and the positioning boss is used to be inserted into the flange connection part; the first sealing ring is used to be sleeved on the outer wall of the positioning boss; the inner edge of the port of the flange connection part is a bell-mouth structure to form a first guide bevel; the first sealing ring is provided with an extrusion bevel that cooperates with the first guide bevel.

2. The compression-resistant flange type FRPP silent drainage vertical inspection pipe fitting according to claim 1 is characterized in that: An annular groove is provided on the inner wall of the flange connection portion, and a second sealing ring is embedded in the annular groove; a second guiding inclined surface or arc surface for cooperating with the second sealing ring is provided at the outer edge of the end of the positioning boss.

3. The compression-resistant flange type FRPP silent drainage vertical inspection pipe fitting according to claim 2 is characterized in that: The depth of the annular groove from the port of the flange connection portion is less than the height of the positioning boss.

4. The compression-resistant flange type FRPP silent drainage vertical inspection pipe fitting according to claim 1 is characterized in that: The central axis of the positioning boss coincides with the center of the flange gland.

5. The compression-resistant flange type FRPP silent drainage vertical inspection pipe fitting according to claim 1 is characterized in that: The flange gland is fixed to the corresponding open end of the flange connection part by bolts and nuts.

6. The compression-resistant flange type FRPP silent drainage vertical inspection pipe fitting according to claim 5 is characterized in that: The outer edge contours of the flange connection part and the flange gland are both rectangular; the sides of the edges and corners of the flange connection part close to the vertical pipe are respectively provided with installation grooves matching the contour of the bolt head for limiting the position of the bolt.

7. The compression-resistant flange type FRPP silent drainage vertical inspection pipe fitting according to claim 1 is characterized in that: The flange connection portion includes a mounting tube for connecting the vertical pipe and an annular mounting plate connected to the outer end of the mounting tube; the outer wall of the mounting tube is provided with annular ribs along its circumference and longitudinal ribs along its axial direction.

8. The compression-resistant flange type FRPP silent drainage vertical inspection pipe fitting according to claim 1 is characterized in that: The riser, the flange connection part and the flange gland are all made of FRPP.

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