Connector sealing structure of nodular cast iron pipe

Abstract

The utility model relates to the technical field of nodular cast iron pipes, in particular to an interface sealing structure of a nodular cast iron pipe, which comprises a first pipe body, a sealing ring, a second pipe body and a sealing assembly, two ends of the first pipe body are respectively a bellmouth and a spigot, a mounting groove is arranged in the bellmouth, the sealing ring is arranged in the mounting groove, and the second pipe body and the first pipe body have the same structure. The second pipe body socket is inserted into the first pipe body socket and is in sliding connection with the sealing ring, the sealing assembly is connected to the socket, and the sealing assembly comprises a protection assembly, a plugging assembly and an auxiliary assembly. According to the utility model, the socket part of the second pipe body can extrude the sealing ring to deform so as to obtain a displacement space, the socket of the second pipe body can be in contact with the plugging assembly and the auxiliary assembly, and the plugging assembly and the auxiliary assembly can form two protective barriers at the socket of the second pipe body, so that the sealing ring is prevented from being in contact with gravel to accelerate abrasion; and the blocking assembly and the auxiliary assembly are mutually staggered, so that the two barriers can be complementary to prevent gravels from entering gaps of the barriers.

Description

TECHNICAL FIELD

[0001] The utility model relates to nodular cast iron pipe technical field, specifically to a kind of nodular cast iron pipe's interface sealing structure. BACKGROUND

[0002] Nodular cast iron pipe refers to the pipe material formed by centrifugal nodular cast iron machine high-speed centrifugal casting after using cast iron adding spheroidizing agent, is called ball tube, ductile cast iron pipe and nodular cast pipe, etc., mainly used for the transport of tap water, is the ideal choice of tap water pipeline material.

[0003] The Chinese patent with publication number CN222377465U discloses a kind of nodular cast iron pipe's interface sealing structure, including the connecting pipe group of two cast iron pipe interfaces outside being sheathed, connecting pipe group includes internal thread pipe and connecting pipe, two cast iron pipes are close to the outer side of one end and are each provided with outer thread, the outer side of each cast iron pipe is provided with first sealing green strip, each cast iron pipe is threadedly sheathed with one nut, nut is fixedly provided with sealing ring on the side close to connecting pipe.The utility model structure design is reasonable, by connecting two cast iron pipes to form primary sealing, internal thread pipe cooperates first sealing green strip to carry out secondary sealing to the interface of two cast iron pipes, by nut cooperation sealing ring, the interface of two cast iron pipes is carried out tertiary sealing, improve the sealing effect of nodular cast iron pipe interface, solve the problem that most of the existing nodular cast iron pipe interface sealing effect is poor, prone to leakage, cause water loss and water pollution, seriously affect the efficiency of nodular cast iron pipe use.

[0004] However, in the above technical solution, only soft sealing ring, hard sealing ring seat and sealing rubber layer are used to realize multi-layer sealing, but during the installation of nodular cast iron pipe, not only straight line needs to be installed, in some cases, nodular cast iron pipe also needs to obtain displacement space through the compression characteristics of soft sealing ring, so that nodular cast iron pipe can displace a certain distance. UTILITY MODEL CONTENTS

[0005] The utility model aims at the problems in the background art, and proposes a kind of nodular cast iron pipe's interface sealing structure.

[0006] The technical solution of this utility model is as follows: A sealing structure for the interface of a ductile iron pipe includes a first pipe body with a socket and a spigot at its two ends, respectively. An installation groove is provided in the socket, and a sealing ring is installed in the installation groove. A second pipe body has the same structure as the first pipe body, and the spigot of the second pipe body is inserted into the socket of the first pipe body and slidably connected to the sealing ring. A sealing assembly is connected to the socket and includes a protective assembly, a plugging assembly, and an auxiliary assembly. The plugging assembly is connected to the socket of the first pipe body, and the protective assembly and the auxiliary assembly are connected to the plugging assembly. The protective assembly and the auxiliary assembly are arranged in parallel and staggered front and rear, and both have the same structure. The protective assembly includes a first sealing block and a first elastic element. Multiple first elastic elements are connected to the protective assembly, and the number of first sealing blocks corresponding to the number of first elastic elements is installed on the first elastic elements. In use, the pushing force of the first elastic element pushes the first sealing block away from the protective assembly and tightly against the spigot of the second pipe body to form a protective barrier. The auxiliary assembly and the plugging assembly move synchronously to form a second barrier.

[0007] Preferably, the protective component includes a retaining ring, which is detachably connected to the socket, and the inner diameter of the retaining ring is larger than the outer diameter of the second pipe socket; and an mounting ring, which has the same center as the retaining ring and is connected to the retaining ring, and the mounting ring has a receiving groove.

[0008] Preferably, the sealing assembly includes a first arc-shaped plate, the number of which corresponds to the number of the first sealing blocks. The first arc-shaped plate is slidably connected in a receiving groove opened on the inner wall of the mounting ring, and the inner and outer sides of the first arc-shaped plate are respectively connected to the first sealing block and the first elastic element.

[0009] Preferably, the auxiliary components include a second arc-shaped plate, of which multiple second arc-shaped plates are distributed, and the second arc-shaped plates are slidably connected to the receiving groove; a second sealing block, the number of which corresponds to the number of arc-shaped plates, and the second sealing block is connected to the second arc-shaped plate; and a second elastic member, the number of which corresponds to the number of arc-shaped plates, with the two ends of the second elastic member respectively connected to the receiving groove and the second arc-shaped plate.

[0010] Preferably, both the first arc-shaped plate and the second arc-shaped plate are connected with protrusions, and the protrusions are slidably connected to the sliding grooves opened on the side wall of the receiving groove.

[0011] Preferably, each of the first arc-shaped plates is connected to a connecting rod, and each connecting rod is connected to a filter screen plate. The adjacent connecting rods are of different lengths, and the adjacent filter screen plates are arranged alternately.

[0012] Preferably, a rubber strip is connected to the end of the filter screen near the second tube inlet.

[0013] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0014] The utility model discloses a sealing assembly and a pipe body, which can prevent sandstone from entering the barrier gap and can prevent the sealing ring from being in contact with sandstone to accelerate its abrasion. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the sectional view schematic drawing of the utility model;

[0016] Figure 2 It is Figure 1 The structure enlarged view of A of 1;

[0017] Figure 3 It is Figure 1 The structure enlarged view of B of 1;

[0018] Figure 4 It is the sealing assembly structure schematic drawing.

[0019] Sign: 1, first pipe body, 2, socket, 3, socket, 4, sealing ring, 5, second pipe body, 6, fixed ring, 7, installation ring, 8, first arc plate, 9, containing groove, 10, first sealing block, 11, first elastic part, 12, second arc plate, 13, second sealing block, 14, second elastic part, 15, lug, 16, sliding slot, 17, connecting rod, 18, filter screen. DETAILED DESCRIPTION

[0020] Example one

[0021] As Figures 1-4As shown in the utility model discloses a ball pipe's interface sealing structure of cast iron, including first pipe body 1, sealing ring 4, second pipe body 5 and sealing assembly, first pipe body 1 both ends are socket 2 and spigot 3 respectively, socket 2 is seted up in and installs the groove, installs sealing ring 4 in the groove, second pipe body 5 and first pipe body 1 structure are same, and second pipe body 5 spigot 3 is inserted into socket 2 of first pipe body 1 and is slidably connected with sealing ring 4;Sealing assembly is connected on socket 3, and sealing assembly includes protection assembly, plugging assembly and auxiliary assembly, and plugging assembly is connected on socket 2 of first pipe body 1, and protection assembly and auxiliary assembly are connected on plugging assembly, and protection assembly and auxiliary assembly are forward and backward parallel staggered arrangement and the structure is same, and protection assembly includes first sealing block 6 and first elastic piece 7, and multiple first elastic piece 7 is connected on protection assembly;First elastic piece 7 selects but is not limited to spring leaf;The first sealing block 6 corresponding to the number of first elastic piece 7 is installed on first elastic piece 7;In use state, first elastic piece 7 pushes the elastic force and pushes first sealing block 6 away from protection assembly and is tightly attached to spigot 3 of second pipe body 5 and forms a protective barrier, and auxiliary assembly and plugging assembly component synchronous action form second barrier.

[0022] Example two

[0023] As Figures 2-4 shown, the utility model discloses a ball pipe's interface sealing structure of cast iron, compared to example one, the detailed structure of sealing assembly is recorded in this embodiment, and protection assembly includes fixed ring 8 and mounting ring 9, and fixed ring 8 is detachably connected on socket 2, and the inner diameter of fixed ring 8 is greater than the outer diameter of spigot 3 of second pipe body 5;Fixed ring 8 is bolted with the flange disc on socket 2;Mounting ring 9 is same with the center of fixed ring 8, and mounting ring 9 is connected on fixed ring 8, and the accommodating groove 10 is seted up on mounting ring 9;

[0024] Plugging assembly still includes first arc plate 11, and the number of first arc plate 11 corresponds to first sealing block 6, and first arc plate 11 is slidably connected in accommodating groove 10 on the inner wall of mounting ring 9, and the two sides of first arc plate 11 are connected with first sealing block 6 and first elastic piece 7 respectively;

[0025] Auxiliary assembly includes second arc plate 12, second sealing block 13 and second elastic piece 14, and second arc plate 12 is circumferentially distributed with multiple with the center of the central axis of first pipe body 1, and second arc plate 12 is slidably connected in accommodating groove 10, and the number of second sealing block 13 corresponds to arc plate, and second sealing block 13 is connected on second arc plate 12;Second sealing block 13 selects but is not limited to rubber material;The number of second elastic piece 14 corresponds to arc plate, and the two ends of second elastic piece 14 are connected with accommodating groove 10 and second arc plate 12 respectively;Second elastic piece 14 is same with first elastic piece 7 in material;

[0026] In an alternative embodiment, the first arc-shaped plate 11 and the second arc-shaped plate 12 are connected with protrusions 15, and the protrusions 15 are connected with sliding grooves 16 formed in the side walls of the accommodating groove 10; the sliding of the protrusions 15 in the sliding grooves 16 can limit the moving position of the first arc-shaped plate 11 and the second arc-shaped plate 12 to prevent deflection;

[0027] In an alternative embodiment, the first arc-shaped plate 11 is connected with connecting rods 17, and the connecting rods 17 are connected with filter screen plates 18; the lengths of adjacent connecting rods 17 are different, and adjacent filter screen plates 18 are staggered in front and back.

[0028] In an alternative embodiment, the filter screen plates 18 are connected with rubber strips near one end of the second pipe body 5; the rubber strips help the filter screen plates 18 to adhere to the surface of the spout 3 of the second pipe body 5.

[0029] In summary, when the utility model is used, after the staff cleans the dirt existing in the positions of the spout 3 and the socket 2 of the first pipe body 1 and the second pipe body 5, applies lubricating oil, and places the sealing ring 4 in the accommodating groove 10 of the socket 2 of the first pipe body 1, then hoists the second pipe body 5 to make the spout 3 of the second pipe body 5 partially inserted into the socket 2 of the first pipe body 1, and the surface of the second pipe body 5 contacts the sealing ring 4 to be sealed, when the second pipe body 5 needs to keep a certain angle with the first pipe body 1 to form a circular arc-shaped pipeline, the deflection of the second pipe body 5 can make the spout 3 of the second pipe body 5 press the sealing ring 4, so that the spout 3 can slide to a certain extent, and the spout 3 moves while pushing part of the first sealing blocks 6 and the second sealing blocks 13 to move, the movement of the first sealing blocks 6 and the second sealing blocks 13 drives the first arc-shaped plate 11 and the second arc-shaped plate 12 to move, and the first elastic members 7 and the second elastic members 14 are pressed, and the other part of the first elastic members 7 and the second elastic members 14 can push the remaining first sealing blocks 6 and the second sealing blocks 13 to adhere to the outer wall of the second pipe body 5 through the elasticity of the first elastic members 7 and the second elastic members 14, when the first sealing blocks 6 adhere to the outer wall of the spout 3, a barrier is formed to isolate the sand and sewage from the outside, the second sealing blocks 13 adhere to the outer wall of the spout 3 to form a second barrier, the second sealing blocks 13 are staggered with the first sealing blocks 6, the second sealing blocks 13 seal the gaps of the first sealing blocks 6 to prevent the sand from entering the gaps to cause abnormal movement of the first sealing blocks 6, and the connecting rods 17 connected with the first arc-shaped plate 11 can also move synchronously, the lengths of adjacent connecting rods 17 are different, the lengths of the connecting rods 17 can make the filter screen plates 18 connected with one end of the connecting rods 18 staggered in front and back, so that the filter screen plates 18 do not hinder each other when the first arc-shaped plate 11 moves, and the filter screen plates 18 can block the soil and sand near the socket 2 of the first pipe body 1 to prevent the soil and sand from entering the socket 2 to accelerate the wear of the sealing ring 4 and other rubber components.

[0030] The embodiment of the utility model is explained in detail above in combination with the drawings, but the utility model is not limited to this, and various changes can be made within the knowledge range possessed by the technical personnel in the technical field, without departing from the utility model purposes.

Claims

1. A joint sealing structure of a ductile cast iron pipe, characterized by, The utility model relates to a kind of pipe joint sealing structures of ductile cast iron pipe, including First pipe body (1), its two ends are socket (2) and spigot (3) respectively, socket (2) is set in installation slot, sealing ring (4) is installed in installation slot; Second pipe body (5), it is same with the structure of first pipe body (1), second pipe body (5) spigot (3) is inserted into socket (2) of first pipe body (1) and is connected with sealing ring (4) sliding; Sealing assembly is connected on socket spigot (3), sealing assembly includes protection assembly, plugging assembly and auxiliary assembly, plugging assembly is connected on the socket (2) of first pipe body (1), protection assembly and auxiliary assembly are connected on plugging assembly, protection assembly and auxiliary assembly are staggered and set in front and back and the structure is same, protection assembly includes first sealing block (6) and first elastic member (7), multiple first elastic members (7) are connected on protection assembly, the number of corresponding first sealing block (6) of first elastic member (7) is installed on first elastic member (7);In use state, first elastic member (7) pushes the first sealing block (6) away from protection assembly and is tightly attached to the spigot (3) of second pipe body (5) to form a protective barrier, auxiliary assembly and plugging assembly component synchronous action form second barrier.

2. The interface sealing structure of the ductile cast iron pipe according to claim 1, wherein The protection assembly comprises Fixed ring (8), it is detachably connected on socket (2), the inner diameter of fixed ring (8) is greater than the outer diameter of second pipe body (5) spigot (3); Mounting ring (9), it is same with the center of fixed ring (8), mounting ring (9) is connected on fixed ring (8), and mounting ring (9) is set with accommodating groove (10).

3. The ductile cast iron pipe joint sealing structure according to claim 1, characterized by The plugging assembly comprises First arc-shaped plate (11), the number is corresponding to first sealing block (6), first arc-shaped plate (11) is slidingly connected in accommodating groove (10) on the inner wall of mounting ring (9), and the inner and outer sides of first arc-shaped plate (11) are connected with first sealing block (6) and first elastic member (7) respectively.

4. The ductile cast iron pipe joint sealing structure according to claim 1, characterized by The auxiliary assembly comprises Second arc-shaped plate (12), it is distributed with multiple, and second arc-shaped plate (12) is slidingly connected in accommodating groove (10); Second sealing block (13), the number is corresponding to arc-shaped plate, and second sealing block (13) is connected on second arc-shaped plate (12); Second elastic member (14), the number is corresponding to arc-shaped plate, and the two ends of second elastic member (14) are connected with accommodating groove (10) and second arc-shaped plate (12) respectively.

5. The ductile cast iron pipe joint sealing structure according to claim 1, wherein First arc-shaped plate (11) and second arc-shaped plate (12) are all connected with protruding block (15), and protruding block (15) is slidingly connected with sliding groove (16) set in the side wall of accommodating groove (10).

6. The ductile cast iron pipe joint seal of claim 1, wherein, First arc-shaped plate (11) is all connected with connecting rod (17), connecting rod (17) is all connected with filter screen plate (18), adjacent connecting rod (17) is different in length, and adjacent filter screen plate (18) is staggered and set in front and back.

7. The ductile cast iron pipe joint seal of claim 1 wherein, The rubber strip is connected on the one end of filter screen plate (18) close to second pipe body (5) spigot (3).

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