Nodular cast iron pipeline splicing device

Abstract

The utility model discloses a nodular cast iron pipeline splicing device, which particularly relates to the field of pipeline construction, and comprises a pit plate, a lifting unit is arranged on the pit plate, a lower bracket is arranged on the lifting unit, an upper bracket is arranged on the lower bracket, and a head bearing groove and a plug groove are arranged in both the lower bracket and the upper bracket. The bearing head groove is used for placing a nodular cast iron pipeline bearing head, the plug groove is used for placing a nodular cast iron pipeline plug, the bearing head groove is communicated with the plug groove, sealing rings are arranged in the bearing head groove and the plug groove, a pressure air inlet pipe and a pressure gauge fixedly penetrate through the upper bracket, and locking structures are arranged on the lower bracket and the upper bracket. According to the utility model, the problems that the splicing efficiency of the nodular cast iron pipe is influenced due to the fact that the existing nodular cast iron pipe cannot quickly meet the requirement of concentricity insertion during splicing are solved; in addition, the spliced nodular cast iron pipe is inconvenient to detect the air tightness at the positions of the plug part and the bearing part.

Description

Technical Field

[0001] The utility model relates to the field of pipeline construction, and more specifically, to a ductile iron pipeline splicing device. Background Art

[0002] Ductile iron pipe is a new type of metal pipe. Ductile iron pipe has the corrosion resistance of cast iron pipe and the toughness and strength of steel pipe, and has the advantages of impact resistance, vibration resistance, thin pipe wall, etc. It is widely used in urban water supply, drainage, and gas transmission projects. The method of making ductile iron pipe is to add magnesium or rare earth magnesium alloy spheroidizer into molten iron before pouring to spheroidize graphite, and at the same time add a certain amount of ferrosilicon or silicon calcium alloy as inoculant to promote the precipitation of graphite into spheres.

[0003] At present, the specific connection of ductile iron pipes is a plug-in connection, and a sliding connection is performed by using a sealing ring. Usually, one end of the ductile iron pipe is a plug part, and the other end is a socket part. By embedding a sealing ring in the socket part, the plug part is inserted into the socket part. During the plug-in process of the ductile iron pipe, the concentricity of the plug-in cannot be quickly met, which affects the splicing efficiency of the ductile iron pipe. In addition, it is inconvenient to test the air tightness of the assembled ductile iron pipe at the plug part and the socket part. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a ductile iron pipe splicing device. The technical problem to be solved by the utility model is: currently, ductile iron pipes cannot quickly meet the concentricity of the plug during assembly, which affects the splicing efficiency of the ductile iron pipes; in addition, the assembled ductile iron pipes are inconvenient to detect the air tightness at the plug part and the socket part.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ductile iron pipe splicing device, comprising a pit plate, a lifting unit is arranged on the pit plate, a lower supporting seat is arranged on the lifting unit, an upper supporting seat is arranged on the lower supporting seat, a socket groove and a plug groove are arranged in the lower supporting seat and the upper supporting seat, the socket groove is used for placing the socket of the ductile iron pipe, the plug groove is used for placing the plug of the ductile iron pipe, the socket groove and the plug groove are communicated, sealing rings are arranged in the socket groove and the plug groove, a pressure inlet pipe and a pressure gauge are fixedly passed through the upper supporting seat, and a locking structure is arranged on the lower supporting seat and the upper supporting seat.

[0006] In a preferred embodiment, the lifting unit includes a pair of bearing seats fixedly connected to the pit plate, a bidirectional screw rod rotatably connected to the pair of bearing seats, a pair of transmission seats threadedly connected to the bidirectional screw rod, and a lifting rod hinged on each transmission seat, and one end of the lifting rod facing away from the transmission seat is hinged at the bottom position of the lower support seat.

[0007] In a preferred embodiment, the drive assembly includes a bracket fixedly connected to one of the bearing seats, a transmission shaft rotatably connected to the bracket, a bevel gear 1 fixedly connected to one end of the transmission shaft, and a bevel gear 2 meshingly connected to the bevel gear 1, and the bevel gear 2 is fixedly connected to one end of the bidirectional screw.

[0008] In a preferred embodiment, the other end of the transmission shaft is provided with an angle groove.

[0009] In a preferred embodiment, a pair of auxiliary support rods are hinged at the bottom of the lower support seat, and the pair of auxiliary support rods are staggered. One end of the auxiliary support rod is hinged to a sliding seat, and the sliding seat is slidably connected to the pit plate.

[0010] In a preferred embodiment, the locking structure includes a fixing seat 1 fixedly connected to the side of the upper supporting seat, a fixing seat 2 fixedly connected to the side of the lower supporting seat, a threaded rod rotatably connected to the fixing seat 2, and a compression nut threadedly connected to the threaded rod.

[0011] In a preferred embodiment, both the fixing seat 1 and the fixing seat 2 are provided with inner grooves, one end of the threaded rod is rotatably connected to the inner groove of the fixing seat 2 via a rotating shaft, and the threaded rod moves through the inner groove of the fixing seat 1.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The utility model is a ductile iron pipe splicing device, which sets a socket working pit in a pre-buried groove of the ductile iron pipe, sets a pit plate in the socket working pit, and uses a lower support seat to provide concentric support for the plug and the socket of the ductile iron pipe, so that it is easy to push the plug into the socket to achieve fast and accurate docking and assembly.

[0014] 2. The utility model provides a ductile iron pipe splicing device, which is provided with an upper support seat on a lower support seat, and uses sealing gaskets provided in a socket groove and a plug groove to act on the pipe wall of the ductile iron pipe, and seals the plug and socket areas of the ductile iron pipe, so that a pressure test is performed on the sealing area through the cooperation of a pressure air inlet pipe and a pressure gauge, thereby meeting the convenience of detecting the air tightness of the ductile iron pipe after assembly.

[0015] 3. A ductile iron pipe splicing device of the utility model can provide height adjustability for the pit plate in the working pit of the bearing head by setting a lifting unit, and the lower support seat and the upper support seat are detachably connected through a locking structure, so that the ductile iron pipe splicing device can be easily taken out and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the base plate and the lifting unit of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the upper supporting seat and the lower supporting seat of the utility model.

[0020] Figure 4 It is a structural schematic diagram of the locking unit of the utility model.

[0021] The accompanying drawings are marked as follows: 1. pit plate; 2. lifting unit; 21. bearing seat; 22. bidirectional screw; 23. transmission seat; 24. lifting rod; 3. drive assembly; 31. bracket; 32. transmission shaft; 33. bevel gear one; 34. bevel gear two; 4. lower support seat; 5. upper support seat; 6. bearing slot; 7. plug slot; 9. sealing gasket; 10. pressure inlet pipe; 11. pressure gauge; 12. locking structure; 121. fixing seat one; 122. fixing seat two; 123. threaded rod; 124. locking nut; 13. auxiliary support rod; 14. sliding seat. DETAILED DESCRIPTION

[0022] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Combined with reference Figure 1-Figure 4The utility model provides a ductile iron pipe splicing device, including a pit plate 1. When the ductile iron pipe is constructed in a groove, a socket working pit can be opened in the groove so that the pit plate 1 can be placed therein, so that it is convenient to provide support for the socket end of the ductile iron pipe first. A lifting unit 2 is arranged on the pit plate 1, and a lower support seat 4 is arranged on the lifting unit 2. An upper support seat 5 is arranged on the lower support seat 4. A socket groove 6 and a plug groove 7 are arranged in the lower support seat 4 and the upper support seat 5. The socket groove 6 is used for placing the ductile iron pipe socket, and the plug groove 7 is used for placing the ductile iron pipe plug. The socket groove 6 and the plug groove 7 are connected. When the ductile iron pipe is actually constructed, the ductile iron pipe using the plug can be lifted by a lifting device and moved into the ductile iron pipe using the socket. The ductile iron pipe using the socket can be placed in the socket groove 6 first. When the socket end and the plug end of the adjacent ductile iron pipes correspond to the socket groove 6 and the plug groove 7 respectively, the concentricity of the adjacent ductile iron pipes can be determined, so as to ensure the quality and efficiency of the insertion and assembly. The socket groove 6 and the plug groove 7 are both provided with sealing gaskets 9. The upper support seat 5 is fixed with a pressure inlet pipe 10 and a pressure gauge 11. The pressure inlet pipe 10 can be provided with a rotating joint, which can facilitate the external air pump to increase the pressure inlet pipe 10. When the upper support seat 5 and the lower support seat 4 are arranged around the ductile iron pipe and sealed, the air tightness of the connection between the socket and the plug can be tested by observing the pressure gauge 11. The lower support seat 4 and the upper support seat 5 are provided with a locking structure 12.

[0024] The lifting unit 2 includes a pair of bearing seats 21 fixedly connected to the pit plate 1, a bidirectional screw rod 22 rotatably connected to the pair of bearing seats 21, a pair of transmission seats 23 threadedly connected to the bidirectional screw rod 22, and a lifting rod 24 hinged on each transmission seat 23, and one end of the lifting rod 24 facing away from the transmission seat 23 is hinged at the bottom position of the lower support seat 4.

[0025] Specifically, by controlling the bidirectional screw rod 22 to rotate, a pair of transmission seats 23 can move toward or away from each other on the bidirectional screw rod 22, and the lifting rod 24 can drive the lower support seat 4 to adjust the height. In this way, while providing support for the ductile iron pipe, the lower support seat 4 can be controlled to be lower than the position of the ductile iron pipe, which can be easily removed from the working pit of the bearing head.

[0026] The driving assembly 3 includes a bracket 31 fixedly connected to one of the bearing seats 21, a transmission shaft 32 rotatably connected to the bracket 31, a bevel gear 1 33 fixedly connected to one end of the transmission shaft 32, and a bevel gear 2 34 meshingly connected to the bevel gear 1 33. The bevel gear 2 34 is fixedly connected to one end of the bidirectional screw rod 22, and the bidirectional screw rod 22 can be driven to rotate by driving the transmission shaft 32 to rotate under the transmission meshing of the bevel gear 2 34 and the bevel gear 1 33.

[0027] The other end of the transmission shaft 32 is provided with an angular groove, which is preferably a hexagonal groove. The setting of the angular groove can cooperate with the insertion of a rotating tool to drive the transmission shaft 32 to rotate.

[0028] A pair of auxiliary support rods 13 are hinged at the bottom of the lower support seat 4, and the pair of auxiliary support rods 13 are staggered. One end of the auxiliary support rod 13 is hinged with a slide seat 14, and the slide seat 14 is slidably connected to the pit plate 1. During the lifting and lowering process of the lower support seat 4, the auxiliary support rod 13 can be adaptively bent at an angle, and the slide seat 14 can slide on the pit plate 1, which can provide a balance and support effect for the lifting and lowering of the pit plate 1. In addition, due to the staggered arrangement of the pair of auxiliary support rods 13, the use of the structure can be reduced while meeting the stability of the height support of the lower support seat 4.

[0029] The locking structure 12 includes a fixing seat 121 fixedly connected to the side of the upper supporting seat 5, a fixing seat 122 fixedly connected to the side of the lower supporting seat 4, a threaded rod 123 rotatably connected to the fixing seat 122, and a locking nut 124 threadedly connected to the threaded rod 123. In the present application, the number of locking structures 12 is at least two groups.

[0030] Both the fixing seat 1 121 and the fixing seat 2 122 are provided with inner grooves, one end of the threaded rod 123 is rotatably connected to the inner groove of the fixing seat 2 122 via a rotating shaft, and the threaded rod 123 movably passes through the inner groove of the fixing seat 1 121 .

[0031] Specifically, when the adjacent ductile iron pipes are arranged on the lower support seat 4 and the concentricity is plugged in, the upper support seat 5 can be arranged on the lower support seat 4, and the threaded rod 123 is rotated to be located in the inner groove of the fixed seat 121, and the pressing nut 124 is rotated on the threaded rod 123 until the pressing nut 124 is pressed on the fixed seat 121, so that the connection between the upper support seat 5 and the lower support seat 4 can be stabilized. At this time, the sealing gasket 9 on the upper support seat 5 and the lower support seat 4 can form a circular center structure and be tightly pressed on the socket and the plug. By sealing the socket and the plug area, the air pump is used to pressurize the pressure inlet pipe 10, and the pressure test method is used to detect the air tightness of the sealing ring at the socket and the plug. This can provide convenient air tightness detection for the assembled ductile iron pipes.

Claims

1. A ductile iron pipe splicing device, characterized in that: The invention comprises a pit plate (1), wherein a lifting unit (2) is arranged on the pit plate (1), wherein a lower support seat (4) is arranged on the lifting unit (2), wherein an upper support seat (5) is arranged on the lower support seat (4), wherein a socket groove (6) and a plug groove (7) are arranged in the lower support seat (4) and the upper support seat (5), wherein the socket groove (6) is used for placing a socket of a ductile iron pipe, wherein the plug groove (7) is used for placing a plug of a ductile iron pipe, wherein the socket groove (6) and the plug groove (7) are connected, wherein a sealing gasket (9) is arranged in the socket groove (6) and the plug groove (7), wherein a pressure air inlet pipe (10) and a pressure gauge (11) are fixedly passed through the upper support seat (5), and wherein a locking structure (12) is arranged in the lower support seat (4) and the upper support seat (5).

2. A ductile iron pipe splicing device according to claim 1, characterized in that: The lifting unit (2) comprises a pair of bearing seats (21) fixedly connected to the pit plate (1), a bidirectional screw rod (22) rotatably connected to the pair of bearing seats (21), a pair of transmission seats (23) threadedly connected to the bidirectional screw rod (22), and a lifting rod (24) hinged on each transmission seat (23), one end of the lifting rod (24) facing away from the transmission seat (23) is hinged at the bottom position of the lower support seat (4), and one end of the bidirectional screw rod (22) is connected to a driving assembly (3).

3. A ductile iron pipe splicing device according to claim 2, characterized in that: The driving assembly (3) comprises a bracket (31) fixedly connected to one of the bearing seats (21), a transmission shaft (32) rotatably connected to the bracket (31), a bevel gear 1 (33) fixedly connected to one end of the transmission shaft (32), and a bevel gear 2 (34) meshingly connected to the bevel gear 1 (33), wherein the bevel gear 2 (34) is fixedly connected to one end of the bidirectional screw rod (22).

4. A ductile iron pipe splicing device according to claim 3, characterized in that: The other end of the transmission shaft (32) is provided with an angle groove.

5. The ductile iron pipe splicing device according to claim 1, characterized in that: A pair of auxiliary support rods (13) are hingedly connected to the bottom of the lower support seat (4), and the pair of auxiliary support rods (13) are arranged in a staggered manner. A sliding seat (14) is hingedly connected to one end of the auxiliary support rod (13), and the sliding seat (14) is slidably connected to the pit plate (1).

6. The ductile iron pipe splicing device according to claim 1, characterized in that: The locking structure (12) comprises a fixing seat 1 (121) fixedly connected to the side of the upper supporting seat (5), a fixing seat 2 (122) fixedly connected to the side of the lower supporting seat (4), a threaded rod (123) rotatably connected to the fixing seat 2 (122), and a compression nut (124) threadedly connected to the threaded rod (123).

7. A ductile iron pipe splicing device according to claim 6, characterized in that: Both the fixing seat 1 (121) and the fixing seat 2 (122) are provided with an inner groove, one end of the threaded rod (123) is rotatably connected to the inner groove of the fixing seat 2 (122) via a rotating shaft, and the threaded rod (123) movably passes through the inner groove of the fixing seat 1 (121).

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