Rubber ring for bell and spigot of nodular cast iron pipe

Abstract

The utility model discloses a nodular cast iron pipe bell and spigot rubber ring which comprises an inserting pipe and a bearing pipe, the end of the inserting pipe is provided with a bearing pipe opening, the bearing pipe opening is in a circular truncated cone shape, the end of the bearing pipe opening is connected with a blocking ring in a welded mode, and the inner wall of the bearing pipe opening is connected with a first clamping ring and a second clamping ring in a welded mode. Rubber rings are mounted on the inner walls of the first clamping ring and the second clamping ring in a matched and clamped mode and comprise a first expansion ring and a second expansion ring which are bilaterally symmetrical, and a filling ring is fixedly connected between the first expansion ring and the second expansion ring and is in matched and sealed connection with the outer wall of the insertion pipe; the first clamping ring and the second clamping ring are used in cooperation, so that the rubber ring can be clamped and installed in the first clamping ring and the second clamping ring, water is injected into the top of the pipe bearing opening, water pressure is formed in a cavity between the first expansion ring and the second expansion ring, and the pipe bearing opening is sealed. And the filling ring is tightly extruded and attached to the outer wall of the insertion pipe, so that the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber gaskets, in particular to a socket rubber gasket for ductile iron pipes. Background Art

[0002] The socket connection of ductile iron pipes is a common and important connection method. Socket connection has many advantages. Compared with other complex connection methods, socket connection is relatively easy to operate, saving installation time and labor costs, and has good sealing performance: it can effectively prevent the leakage of substances inside the pipeline and ensure the stable operation of the pipeline system. For example, in the urban sewage discharge system, good sealing performance can avoid environmental pollution caused by sewage leakage. It has relatively high strength: the socket part is reasonably designed and processed, and can withstand a certain amount of pressure and tension. When connecting ductile iron pipes at present, it is usually necessary to install a sealing gasket between the inserted pipe and the socket pipe for sealing. Since traditional socket rubber gaskets for ductile iron pipes are usually directly inserted and docked for easy installation, there is a lack of limiting and pressurizing structures for the socket rubber gaskets of ductile iron pipes. Therefore, during long-term use, the connection between the socket rubber gaskets of ductile iron pipes and the ductile iron pipes is likely to become loose, which is not convenient for improving the sealing effect and not convenient for use. Content of the Utility Model

[0003] The purpose of the utility model is to provide a socket rubber gasket for ductile iron pipes.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A socket rubber gasket for ductile iron pipes of the utility model, including an inserted pipe and a socket pipe. The end of the inserted pipe is provided with a socket mouth, the socket mouth is set in a frustum shape, a blocking ring is welded and connected to the end of the socket mouth, a first clamping ring and a second clamping ring are welded and connected to the inner wall of the socket mouth, the rubber gasket is installed by being clamped and matched with the inner walls of the first clamping ring and the second clamping ring, the rubber gasket includes a first expansion ring and a second expansion ring which are symmetric left and right, a filling ring is fixedly connected between the first expansion ring and the second expansion ring, and the filling ring is hermetically connected with the outer wall of the inserted pipe in a matching manner.

[0006] Further, a filling pipe is welded and connected to the inner wall of the top of the socket mouth, a first plug is threadedly connected to the inner wall of the filling pipe, and a drain pipe is welded and connected to the inner wall of the bottom of the socket mouth.

[0007] Further, a second plug is threadedly connected to the bottom of the drain pipe, the second plug is threadedly connected to the inner wall of the drain pipe, and a hexagonal prism is fixedly connected to the outer walls of the first plug and the second plug, and the hexagonal prism is used to cooperate with a wrench for rotation.

[0008] Further, the inner wall of the filling ring is sleeved and connected with the outer wall of the intubation tube, and arc-shaped grooves are evenly formed in the outer wall of the filling ring.

[0009] Further, the cross sections of the first expansion ring and the second expansion ring are L-shaped, and the outer walls of the first expansion ring and the second expansion ring are clamped and connected with the inner walls of the first clamping ring and the second clamping ring.

[0010] Further, a first sealing patch is arranged on the outer wall of the first expansion ring, and a second sealing patch is arranged on the outer wall of the second expansion ring.

[0011] Further, a first plugging ring is fixedly connected to the outer wall of the first expansion ring, and a second plugging ring is fixedly connected to the outer wall of the second expansion ring.

[0012] In the above technical solution, a rubber gasket for the socket and spigot of a ductile iron pipe provided by the present utility model has the following beneficial effects:

[0013] 1. By setting the first clamping ring and the second clamping ring to be used in cooperation, the rubber gasket can be clamped and installed inside the first clamping ring and the second clamping ring. By adding water at the top of the socket, a water pressure is formed in the cavity between the first expansion ring and the second expansion ring, and the filling ring is tightly pressed and fitted against the outer wall of the intubation tube, improving the sealing effect;

[0014] 2. By arranging a drain pipe at the bottom of the socket, when it is necessary to separate the intubation tube and the socket, by opening the second plug, under the action of gravity, the water can be discharged to relieve the pressure, facilitating the separation of the intubation tube and the socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0016] Figure 1 It is a front view structural schematic diagram of a rubber gasket for the socket and spigot of a ductile iron pipe provided by an embodiment of the present utility model;

[0017] Figure 2 It is a cross-sectional structural schematic diagram of a rubber gasket for the socket and spigot of a ductile iron pipe provided by an embodiment of the present utility model;

[0018] Figure 3 It is an exploded structural schematic diagram of a rubber gasket for the socket and spigot of a ductile iron pipe provided by an embodiment of the present utility model;

[0019] Figure 4Schematic diagram of the socket end structure of a rubber gasket for the socket and spigot of a ductile iron pipe provided by an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the rubber gasket structure of a rubber gasket for the socket and spigot of a ductile iron pipe provided by an embodiment of the present invention.

[0021] In the figure: insertion pipe 100, receiving pipe 110, receiving pipe orifice 120, first snap ring 130, second snap ring 140, card slot 150, blocking ring 160, filling pipe 170, first plug 171, drain pipe 180, second plug 181, rubber gasket 200, filling ring 210, first expansion ring 220, first sealing patch 221, first sealing ring 222, second expansion ring 230, second sealing patch 231, second sealing ring 232. Detailed implementation manners

[0022] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Embodiment 1:

[0024] See Figures 1 - 3 as shown;

[0025] A rubber gasket for the socket and spigot of a ductile iron pipe of the present invention includes an insertion pipe 100 and a receiving pipe 110. The end of the insertion pipe 100 is provided with a receiving pipe orifice 120. The receiving pipe orifice 120 is arranged in a frustum shape. A blocking ring 160 is welded to the end of the receiving pipe orifice 120. A first snap ring 130 and a second snap ring 140 are welded to the inner wall of the receiving pipe orifice 120. The rubber gasket 200 is fitted and clamped between the inner walls of the first snap ring 130 and the second snap ring 140. The rubber gasket 200 includes a first expansion ring 220 and a second expansion ring 230 that are symmetric about the left and right. A filling ring 210 is fixedly connected between the first expansion ring 220 and the second expansion ring 230. The first expansion ring 220 is hermetically connected to the outer wall of the insertion pipe 100. By providing the receiving pipe orifice 120 for fitting and connecting the insertion pipe 100, and by using the first snap ring 130 and the second snap ring 140 in cooperation, the rubber gasket 200 can be clamped and installed inside the first snap ring 130 and the second snap ring 140, so as to prevent the rubber gasket 200 from coming off.

[0026] Embodiment 2:

[0027] See Figure 4 as shown;

[0028] A rubber gasket for the socket and spigot of a ductile iron pipe of the present utility model includes a filling pipe 170 welded to the inner wall of the top of the socket 120. A first plug 171 is threadedly connected to the inner wall of the filling pipe 170. A drain pipe 180 is welded to the inner wall of the bottom of the socket 120. By connecting the filling pipe 170 to the top of the socket 120, water is injected between the socket 120 and the rubber gasket 200, so that the rubber gasket 200 can be extruded and tightly attached to the outer wall of the socket pipe 110 by deformation. By providing the drain pipe 180, when it is necessary to separate the spigot 100 and the socket pipe 110, the water between the socket 120 and the rubber gasket 200 can be discharged for pressure relief, facilitating the extraction of the spigot 100 from the socket 120. A second plug 181 is threadedly connected to the bottom of the drain pipe 180, and the second plug 181 is threadedly connected to the inner wall of the drain pipe 180. The outer walls of the first plug 171 and the second plug 181 are fixedly connected with hexagonal prisms, which are used to cooperate with a wrench for rotation.

[0029] Embodiment 3:

[0030] See Figures 3 - 5 as shown;

[0031] A rubber gasket for the socket and spigot of a ductile iron pipe of the present utility model includes that the inner wall of the filling ring 210 is cooperatively sleeved and connected with the outer wall of the spigot 100. Arc-shaped grooves 211 are uniformly formed on the outer wall of the filling ring 210. By providing the filling ring 210, it is deformed by water pressure extrusion, so that an extrusion force is formed between the filling ring 210 and the outer wall of the spigot 100, so that the filling ring 210 is tightly attached to the outer wall of the spigot 100 to achieve a sealing effect. By providing the arc-shaped grooves 211, the filling ring 210 can be easily deformed. The cross-sections of the first expansion ring 220 and the second expansion ring 230 are L-shaped. The outer walls of the first expansion ring 220 and the second expansion ring 230 are cooperatively clamped with the inner walls of the first clamping ring 130 and the second clamping ring 140. By using the first expansion ring 220 and the second expansion ring 230 in cooperation, the rubber gasket 200 can be clamped and connected between the first clamping ring 130 and the second clamping ring 140 inside the socket 120, thus conveniently preventing the rubber gasket 200 from falling off and improving the sealing tightness when the spigot 100 and the socket pipe 110 are docked. A first sealing patch 221 is provided on the outer wall of the first expansion ring 220, and a second sealing patch 221 is provided on the outer wall of the second expansion ring 230. A first sealing ring 222 is fixedly connected to the outer wall of the first expansion ring 220, and a second sealing ring 232 is fixedly connected to the outer wall of the second expansion ring 230. By using the first sealing patch 221 and the second sealing patch 221 in cooperation, it is convenient to make the first expansion ring 220 and the second expansion ring 230 form a tension with the first clamping ring 130 and the second clamping ring 140, so as to achieve a sealing effect.

[0032] The specific use process of the utility model is as follows: When those skilled in the art use it, the rubber gasket 200 is inserted into the inside of the socket end 120 after being deformed by pressing, so that the first expansion ring 220 is snap-fitted and installed inside the card slot 150 between the second snap ring 140 and the blocking ring 160. Then, the insertion pipe 100 is inserted into the inside of the rubber gasket 200, so that the first expansion ring 220 wraps around the outer wall of the insertion pipe 100. Then, the first plug 171 is opened by a wrench, and water is added into the filling pipe 170, so that the water pressure squeezes between the first expansion ring 220, the second expansion ring 230 and the top cavity of the filling ring 210, so that the filling ring 210 is deformed and tightly attached to the outer wall of the socket pipe 110, thereby playing a role in sealing between the insertion pipe 100 and the socket pipe 110.

[0033] Only some exemplary embodiments of the present utility model have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A rubber sealing ring for the socket and spigot of a ductile iron pipe, comprising a spigot pipe (100) and a socket pipe (110). An end of the spigot pipe (100) is provided with a socket mouth (120), and the socket mouth (120) is arranged in a frustum shape. A blocking ring (160) is welded and connected to an end of the socket mouth (120), and it is characterized in that, A first clamping ring (130) and a second clamping ring (140) are welded and connected to the inner wall of the socket pipe orifice (120). A rubber sealing ring (200) is clamped and installed by the cooperation of the inner walls of the first clamping ring (130) and the second clamping ring (140). The rubber sealing ring (200) includes a first expansion ring (220) and a second expansion ring (230) which are symmetrical left and right. A filling ring (210) is fixedly connected between the first expansion ring (220) and the second expansion ring (230). The first expansion ring (220) is hermetically connected with the outer wall of the inserting pipe (100) in a matching manner.

2. The rubber gasket for the socket and spigot of a ductile iron pipe according to claim 1, wherein, A filling pipe (170) is welded and connected to the inner wall at the top of the socket pipe orifice (120). A first plug (171) is threadedly connected to the inner wall of the filling pipe (170). A drain pipe (180) is welded and connected to the inner wall at the bottom of the socket pipe orifice (120).

3. A rubber sealing ring for the socket and spigot of ductile iron pipes according to claim 2, characterized in that, A second plug (181) is threadedly connected to the bottom of the drain pipe (180). The second plug (181) is threadedly connected to the inner wall of the drain pipe (180). A hexagonal prism is fixedly connected to the outer walls of the first plug (171) and the second plug (181). The hexagonal prism is used to cooperate with a wrench for rotation.

4. A rubber gasket for the socket and spigot of a ductile iron pipe according to claim 1, characterized in that, The inner wall of the filling ring (210) is sleeved and connected with the outer wall of the inserting pipe (100) in a matching manner. Arc-shaped grooves (211) are uniformly formed in the outer wall of the filling ring (210).

5. A rubber sealing ring for the socket and spigot of a ductile iron pipe according to claim 4, characterized in that, The cross sections of the first expansion ring (220) and the second expansion ring (230) are L-shaped. The outer walls of the first expansion ring (220) and the second expansion ring (230) are clamped and connected with the inner walls of the first clamping ring (130) and the second clamping ring (140). A clamping groove (150) is formed between the second clamping ring (140) and the blocking ring (160).

6. A rubber sealing ring for the socket and spigot of a ductile iron pipe according to claim 5, characterized in that, A first sealing patch (221) is arranged on the outer wall of the first expansion ring (220). A second sealing patch (231) is arranged on the outer wall of the second expansion ring (230).

7. A rubber gasket for the socket and spigot of a ductile iron pipe according to claim 6, characterized in that, A first blocking ring (222) is fixedly connected to the outer wall of the first expansion ring (220). A second blocking ring (232) is fixedly connected to the outer wall of the second expansion ring (230).

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