Saddle-shaped bypass for online electric smelting connection

Abstract

The invention discloses a saddle-shaped bypass for online electric smelting connection, and aims to overcome the defects that an existing electric smelting saddle-shaped bypass is complex in structure and large in number of component parts. The device comprises a bypass main body, an electric heating welding structure and a drilling tool, wherein the positioning and fixing structure comprises a lower support fixing belt connected to one end of the arc attaching sheet body, an upper fixing wing connected to the other end of the arc attaching sheet body and a lower fixing wing on the lower support fixing belt, and the upper fixing wing and the lower fixing wing are fixed through a fastener to tension the lower support fixing belt so that the bypass main body can be pressed on the main pipeline. The positioning and fixing structure can reduce the number of parts and reduce the cost of the device.

Description

Technical Field

[0001] The invention relates to the field of pipeline construction, and more particularly to a saddle-shaped bypass for online electric fusion connection. Background Art

[0002] The electrofusion saddle bypass is a commonly used accessory in PE pressure pipes. It is often used to add new branches to mature PE natural gas, water supply, industrial fluid and other fluid transportation pipelines that have been put into operation.

[0003] Due to the complex structure and special functions of this product, the traditional saddle-type bypass is usually composed of multiple components, the product cost is high, the price is expensive, and the operation is not very convenient, which affects its large-scale application in engineering.

[0004] This application aims to address the shortcomings of existing electric fusion saddle-type bypasses, such as complex structure and large number of components, and to provide a saddle-type bypass with online electric fusion connection, thereby simplifying product components and reducing manufacturing costs. Summary of the Invention

[0005] The present invention overcomes the shortcomings of the existing electric fusion saddle-shaped bypass, such as complex structure and large number of components, and provides a saddle-shaped bypass with online electric fusion connection, which simplifies product components and reduces manufacturing costs.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An online electric fusion connection saddle-type bypass for connecting a main pipeline, comprising:

[0008] The bypass body includes a feed pipe, a branch end pipe connected to the side wall of the feed pipe, an arc-fitting sheet connected to one end of the feed pipe and fitted with the surface of the main pipe, and a positioning and fixing structure provided on the arc-fitting sheet;

[0009] The electric heat welding structure includes an electric heating plate integrally formed with the arc-fitting plate body and an exposed conductive member electrically connected to the heating wire; and

[0010] The drilling tool moves along the feed tube seal and digs holes by rotating;

[0011] Among them, the positioning and fixing structure includes a lower supporting fixing belt connected to one end of the arc fitting sheet, an upper fixing wing connected to the other end of the arc fitting sheet and a lower fixing wing on the lower supporting fixing belt. The upper fixing wing and the lower fixing wing are fixed by fasteners to tighten the lower supporting fixing belt so that the bypass body is pressed into the main pipeline.

[0012] An electrofused saddle bypass is used to connect to an existing pipeline, creating a bypass branch while maintaining the existing pipeline's operation. During this process, the electrofused saddle bypass must maintain a seal with the main pipeline to prevent the escape of gases and liquids from the main pipeline.

[0013] The feed pipe of the bypass body is connected to the branch end pipe, so that after the drilling tool in the feed pipe creates a hole on the surface of the main pipe, the main pipe can be connected to the branch end pipe through the dug hole to form a branch.

[0014] In order to achieve sealing, the main pipe is fitted with an arc-shaped fitting sheet, positioned using a positioning and fixing structure, and then fixed using an electric heat welding structure to maintain the seal and the sealing is continuous.

[0015] The positioning and sealing structure of the existing electric melting saddle-type bypass is relatively complicated, and this application makes improvements based on this.

[0016] The improvements include connecting the upper and lower fixed wings and fasteners using a screw-slider pair, bringing them closer together. This tightens the lower support strap, press-fitting the bypass body onto the main pipe and achieving positioning. An electric heater then conducts electricity to melt the arc-shaped fitting, integrating the bypass body and the main pipe and achieving a seal.

[0017] Through the above structure, a large number of parts used for positioning can be reduced, thereby reducing the cost of the electric melting saddle bypass and making the device easy to promote.

[0018] Preferably, along the direction from away from the arc-fitting sheet to closer to the arc-fitting sheet, the feed tube includes a sealing section and a threaded section, the drilling tool includes a shank sealing section, a shank threaded section, and a drilling cutter head, the sealing section and the shank sealing section are sealedly connected, the shank threaded section and the threaded section are threadedly connected, and the drilling tool advances or retracts by rotation. The sealed connection between the sealing section and the shank sealing section constitutes a piston, which limits the escape of gas from the gap between the sealing section and the shank sealing section. The connection method of the shank threaded section and the threaded section allows the rotation to not only drive the drilling tool to feed but also rotate to achieve drilling of the main pipeline.

[0019] Preferably, the branch end pipe is arranged at the position of the sealing section corresponding to the bypass body. The structure allows the gas or liquid after the hole is dug to leave the branch end pipe without passing through the sealing section, avoiding impacting the sealing section or destroying the sealing effect of the sealing section.

[0020] Preferably, when the drilling tool is retracted, the drilling head is higher than the branch pipe to avoid turbulence near the drilling head, which may affect the flow resistance or cause the hole cover of the main pipeline hole dug by the drilling head to fall out.

[0021] Preferably, sealing rings are installed at both ends of the knife handle sealing section, thereby further improving the sealing effect.

[0022] Preferably, the drilling head includes a plurality of blades distributed along the circumference, the inner sides of each blade being provided with positioning threads for positioning the cut block. The structure is used to dig out a hole cover corresponding to the distribution of the blades, and the positioning threads are used to position the hole cover to prevent it from falling into the pipeline.

[0023] Preferably, the portion of the blade extending from the drilling tool is in an equilateral triangle structure, which can effectively reduce resistance and lower drilling torque during drilling.

[0024] Preferably, the heating element is disposed on the inner wall of the arc-shaped conformable sheet, and the exposed conductive member includes a conductive insert and a conductive terminal embedded in the arc-shaped conformable sheet, wherein the conductive terminal and the conductive insert are threadedly connected. This structure is used to form an easily connectable closed loop, using electrical heat to thermally fuse the bypass body and the main pipeline.

[0025] Preferably, the tool further comprises a plurality of cam wedges circumferentially mounted on the sidewall of the feed tube. The sidewall of the feed tube has wedge slots adapted to the cam wedges. The depth of the wedge slots is adapted to the cam wedges so that the cam wedges are flush with the inner wall of the feed tube. The cam wedges are dumbbell-shaped, with large, round ends and a thin center. The maximum edge-to-edge distance of the cam wedges is greater than the distance from the tool shank sealing section to the inner wall of the feed tube threaded section. When the drilling tool reaches a preset stroke limit, the drilling tool only engages one end of the cam wedge. The end of the cam wedge separated from the drilling tool rotates as the drilling tool moves to limit the cut material block produced by the drilling tool or the hole. This structure enables positioning of the cut material block and positioning of the drilling tool stroke.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The positioning and fixing structure can reduce the number of parts and components and reduce the cost of the device;

[0028] (2) The drilling tool only needs to rotate circumferentially to achieve feeding and cutting. A design is also provided to collect the waste generated by cutting to prevent the waste from falling into the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 2 is a cross-sectional schematic diagram of the side of the present invention in a retracted state;

[0030] Figure 2 It is a cross-sectional schematic diagram of the front feed state of the present invention;

[0031] Figure 3 It is a schematic diagram of the front view of the present invention;

[0032] Figure 4 Schematic diagram of embodiment 2 of the present invention in the feeding (feeding) state;

[0033] Figure 5 This is a schematic diagram of Example 2 of the present invention in a retracted (knife-retracted) state;

[0034] In the picture:

[0035] Main pipeline 1, bypass body 2, lower support fixing belt 211, upper fixing wing 212, lower fixing wing 213, fastener 214, feed tube 22, threaded section 221, sealing section 222, branch end tube 23, arc fitting sheet 24, observation window 241, electric heating plate 31, conductive insert 32, conductive terminal 33, drilling tool 4, tool handle sealing section 41, sealing ring 411, tool handle threaded section 42, drilling head 43, blade 431, cover cap 5, cam wedge 61, wedge groove 62. DETAILED DESCRIPTION

[0036] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0037] Example 1:

[0038] A saddle-type bypass for online electrofusion connection, Figure 1 As shown, it is used to connect the main pipeline 1, including:

[0039] The bypass body 2 includes a feed pipe 22, a branch end pipe 23 connected to the side wall of the feed pipe 22, an arc-shaped fitting sheet 2424 connected to one end of the feed pipe 22 and fitted with the surface of the main pipe 1, and a positioning and fixing structure provided on the arc-shaped fitting sheet 2424;

[0040] The electric heat welding structure includes an electric heating plate 31 integrally formed with the arc-fitting plate body 2424 and an exposed conductive member electrically connected to the heating wire; and

[0041] The drilling tool 4 moves along the feed tube 22 in a sealed manner and digs holes by rotating; in some embodiments, a cover cap 5 is also included.

[0042] Ginseng Figure 2 As shown, the positioning and fixing structure includes a lower supporting fixing belt 211 connected to one end of the arc fitting sheet 2424, an upper fixing wing 212 connected to the other end of the arc fitting sheet 2424, and a lower fixing wing 213 on the lower supporting fixing belt 211. The upper fixing wing 212 and the lower fixing wing 213 are fixed by fasteners 214 to tighten the lower supporting fixing belt 211 so that the bypass body 2 is pressed into the main pipeline 1.

[0043] The inner diameter of the arc-shaped fitting sheet 2424 is aligned with the outer diameter of the main pipe 1. The arc-shaped fitting sheet 2424 extends in both directions along the length of the main pipe 1, centered on the axis of the cutter tube 22, and also extends in both directions along the circumference of the main pipe 1. In some embodiments, the angle between the two ends extending in the circumferential direction and the axis of the main pipe 1 is greater than 90 degrees and less than 180 degrees.

[0044] The axis of the cutter feed tube 22 lies radially relative to the main conduit 1. From the arc-shaped fitting plate 2424 toward the arc-shaped fitting plate 2424, the cutter feed tube 22 includes a sealing section 222 and a threaded section 221. The inner diameter of the sealing section 222 is smaller than that of the threaded section 221. The sealing section 222 and the threaded section 221 are transitioned by a step.

[0045] The branch pipe 23 is positioned in the bypass body 2 at a location corresponding to the sealing section 222. This structure allows gas or liquid to exit the branch pipe 23 after the hole is dug without passing through the sealing section 222, thus preventing it from impacting or damaging the sealing effect of the sealing section 222. The axis of the branch pipe 23 is perpendicular to the axis of the cutter feed pipe 22 and lies in the same plane.

[0046] As shown in Figure 3 , the electric heater 31 is mounted on the inner wall of the circular arc-shaped fitting plate 2424. The exposed conductive components include a conductive insert 32 and a conductive terminal 33 embedded in the circular arc-shaped fitting plate 2424. The conductive terminal 33 is threadedly connected to the conductive insert 32. This structure forms an easily connectable closed circuit, generating heat through electricity to fuse the bypass body 2 and the main pipe 1. The electric heater 31 contains a spirally arranged heating wire, which is coated with enameled wire to prevent short circuits. The ends of the heating wire are electrically connected to the conductive insert 32. The circular arc-shaped fitting plate 2424 extends along the length of the main pipe 1, centered on the axis of the feed tube 22. Observation windows 241 are located on either side of the feed tube 22 for observing the welding process. Terminal shields are also located on either side of the feed tube 22 to position the conductive terminal 33.

[0047] The upper and lower fixing wings 212, 213 each have a connection hole. The diameter of the connection hole on the upper fixing wing 212 is larger than that of the connection hole on the lower fixing wing 213. Fasteners 214 are self-tapping bolts with an outer diameter smaller than that of the connection hole on the upper fixing wing 212, but larger than that of the connection hole on the lower fixing wing 213. Rotating the upper and lower fixing wings 212, 213, draw them closer, tightening the lower support strap 211 and providing sufficient pressure for the bypass body 2 to fuse with the main pipeline 1.

[0048] The support and fixing belt 211 is a flat and wide flexible member that is flexible in a specific direction. In some embodiments, the support and fixing belt 211 includes a plurality of belt bodies that are parallel or staggered.

[0049] The length of the lower support fixing band 211 is slightly shorter than the outer circumference of the main pipe 1 exposed outside the arc fitting sheet 2424. The tension generates pressure to force the arc fitting sheet 2424 to fit and position the main pipe 1. This prevents displacement during the subsequent hot melt process, which may cause connection and sealing failure.

[0050] In some embodiments, the main material of the bypass body 2 is HDPE.

[0051] The end of the feed tube 22, away from the arc-shaped fitting plate 2424, is open and has threads on its sidewall for connection to a cap 5. The cap 5 protects the feed tube 22 and the drilling tool 4 positioned therein. The top of the feed tube 22 is open to allow access to the drilling tool 4, allowing it to be fed.

[0052] The drilling tool 4 comprises a shank sealing section 41, a shank threaded section 42, and a drilling head 43. The diameter of the shank threaded section 42 is larger than that of the shank sealing section 41. This structure prevents the drilling tool 4 from completely exiting the feed tube 22, which could cause seal failure and allow fluid in the main pipeline 1 to escape through the feed tube 22. Due to this arrangement, the drilling tool 4 is installed by screwing it into the feed tube 22 from the end closest to the arc-shaped fitting 2424.

[0053] The sealing section 222 is sealedly connected to the handle sealing section 41, with sealing rings 411 mounted at each end. This structure further improves the sealing effect. The handle sealing section 41 has annular grooves at each end, into which the sealing rings 411 are mounted. The sealed connection between the sealing section 222 and the handle sealing section 41 forms a piston, restricting gas from escaping through the gap between the sealing section 222 and the handle sealing section 41.

[0054] It is worth noting that during the entire travel of the drilling tool 4 , at least a portion of the tool shank sealing section 41 is in contact with the sealing section 222 .

[0055] When the drilling tool 4 is finished retracting, the drilling head 43 is higher than the branch end pipe 23. Avoid forming turbulence near the drilling head 43, affecting the flow resistance or causing the hole cover of the main pipeline 1 channel dug out on the drilling head 43 to fall out.

[0056] The toolholder threaded section 42 is threadedly connected to the threaded section 221, and the drilling tool 4 rotates to advance or retract. This connection allows the toolholder threaded section 42 and the threaded section 221 to not only drive the drilling tool 4 forward but also rotate, thereby drilling the main pipe 1. Because the end of the feed tube 22 where the cap 5 is mounted is open, a slot similar to a cross or slotted slot can be provided on the end of the drilling tool 4 away from the drilling head 43 to control the rotation of the drilling tool 4 using a screwdriver.

[0057] The drilling head 43 includes several blades 431 distributed along the circumferential direction. The drilling tool 4 is made of POM, and the blades 431 are made of metal. The blades 431 and the drilling tool 4 are integrated into one piece through injection molding, and the blades 431 are installed on the guide rod of the drilling tool 4 in the form of an insert. To position the blades 431, the end of the guide rod has several equally spaced openings distributed in the circumferential direction, and the blades 431 are installed in these openings. During the injection molding process, plastic made of the same material as the guide rod enters these openings to achieve positioning of the blades 431 and the tool. This method can achieve the effect of reliably connecting the blades 431 and the tool.

[0058] The diameter of the drilling head 43 is smaller than the shank threaded section 42 , which can prevent the drilling tool 4 from being fully inserted into the main pipe 1 and causing excessive cutting and separation from the sealing section 222 , resulting in seal failure and fluid leakage in the main pipe 1 .

[0059] The portion of the blade 431 extending from the drilling tool 4 is equilaterally triangular in shape, effectively reducing resistance and lowering drilling torque during drilling. The thickness of the blade 431 at its base is 0.5-0.8 mm.

[0060] The inner side of the blade 431 is provided with a positioning thread for positioning the cut material. The structure is used to dig out a hole cover corresponding to the distribution of the blade 431 and use the positioning thread to position the hole cover to prevent the hole cover from falling into the pipeline.

[0061] The electro-fused saddle bypass is used to connect to the existing pipeline, opening a bypass branch under the premise of continuous pipeline transportation. During this process, the electro-fused saddle bypass needs to maintain a seal with the main pipeline 1 to limit the leakage of gas and liquid in the main pipeline 1.

[0062] The feed pipe 22 of the bypass body 2 is connected to the branch end pipe 23, so that after the drilling tool 4 in the feed pipe 22 creates a hole on the surface of the main pipe 1, the main pipe 1 can be connected to the branch end pipe 23 through the dug hole to form a branch.

[0063] In order to achieve sealing, the main pipe 1 is fitted with the arc fitting sheet 2424, positioned using the positioning and fixing structure, and then fixed using the electric heat welding structure, thereby maintaining the seal and the continuity of the seal.

[0064] The positioning and sealing structure of the existing electric melting saddle-type bypass is relatively complicated, and this application makes improvements based on this.

[0065] The improvement includes connecting the upper and lower fixing wings 212, 213, and fasteners 214 using a screw-slider pair, bringing the upper and lower fixing wings 212, 213 closer together, thereby tightening the lower support fixing belt 211, thereby press-fitting the bypass body 2 onto the main pipe 1 and achieving positioning. Then, the electric heater 31 is used to conduct electricity to melt the arc-shaped bonding sheet 2424, integrating the bypass body 2 and the main pipe 1 and achieving a seal.

[0066] Through the above structure, a large number of parts used for positioning can be reduced, thereby reducing the cost of the electric melting saddle bypass and making the device easy to promote.

[0067] The process of using this device is as follows:

[0068] (1) Mount the arc-shaped bonding sheet 2424 on the main pipe 1;

[0069] (2) Use the lower support fixing belt 211 to wrap around the main pipe 1, and use the fastener 214 to connect the upper fixing wing 212 and the lower fixing wing 213 so that the lower support fixing belt 211 is in a tensioned state;

[0070] (3) Then, the electric heater 31 is energized to fuse the bypass body 2 and the main pipe 1 into one;

[0071] (4) Remove the cap 5 and drive the drilling tool 4 to feed into the main pipe 1 to dig a hole;

[0072] (5) rotating the drilling tool 4 in the reverse direction to withdraw the drilling tool 4 to the limit of its travel;

[0073] (6) Install the cap 5.

[0074] Example 2:

[0075] On the basis of Example 1, the following structure is also provided:

[0076] Ginseng Figure 4 and 5 As shown, it also includes a plurality of cam wedge blocks 61 installed circumferentially on the side wall of the feed tube 22. The side wall of the feed tube 22 has a wedge block groove 62 that adapts to the cam wedge blocks 61. The depth of the wedge block groove 62 adapts to the cam wedge blocks 61, so that the cam wedge blocks 61 are flush with the inner wall of the feed tube 22.

[0077] The cam wedge 61 is in the shape of a dumbbell with large and round ends and a thin middle. The maximum distance from edge to edge of the cam wedge 61 is greater than the distance from the tool handle sealing section 41 to the inner wall of the threaded section 221 of the tool feed tube 22.

[0078] When the feeding of the drilling tool 4 reaches the preset stroke limit (i.e. the feeding depth is sufficient to complete the hole digging), the drilling tool 4 only fits against the end below the cam wedge 61. The feeding of the drilling tool 4 drives the cam wedge 61 to rotate around one end. The cam wedge 61 abuts against the shank sealing section 41, limiting the continued feeding of the drilling tool 4.

[0079] When the drilling tool 4 shrinks to the stroke limit, the drilling tool 4 only fits against the end above the cam wedge 61. The shrinkage of the drilling tool 4 drives the cam wedge 61 to rotate around the other end, so that the cam wedge 61 is located below the cutting block, preventing it from falling.

[0080] The driving of the cam wedge 61 by the drilling tool 4 is provided by friction.

[0081] This rotation occurs only after one end is no longer in contact with the handle threaded segment 42. When both ends of the cam wedge 61 are in contact with the handle threaded segment 42, it is restrained by the handle threaded segment 42 and cannot rotate. Once the handle threaded segment 42 moves away from one end of the cam wedge 61, its forward movement drives the cam wedge 61 to rotate about the wedge slot 62. The drilling tool 4 retracts, lifting the cut piece, and the rotating cam wedge 61 prevents it from falling.

[0082] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A saddle-type bypass for online electrofusion connection, used to connect the main pipeline, characterized by: include: The bypass body includes a feed pipe, a branch end pipe connected to the side wall of the feed pipe, an arc-fitting sheet connected to one end of the feed pipe and fitted with the surface of the main pipe, and a positioning and fixing structure provided on the arc-fitting sheet; The electric heating welding structure includes an electric heating sheet integrally formed with the arc-fitting sheet body and an exposed conductive member electrically connected to the heating wire; and The drilling tool moves along the feed tube seal and digs holes by rotating; Among them, the positioning and fixing structure includes a lower supporting fixing belt connected to one end of the arc fitting sheet, an upper fixing wing connected to the other end of the arc fitting sheet and a lower fixing wing on the lower supporting fixing belt. The upper fixing wing and the lower fixing wing are fixed by fasteners to tighten the lower supporting fixing belt so that the bypass body is pressed into the main pipeline.

2. The saddle-type bypass for online electrofusion connection according to claim 1, characterized in that: Along the direction from away from the arc fitting sheet to close to the arc fitting sheet, the feed tube includes a sealing section and a threaded section, the drilling tool includes a tool holder sealing section, a tool holder threaded section and a drilling head, the sealing section and the tool holder sealing section are sealed and connected, the tool holder threaded section and the threaded section are threadedly connected, and the drilling tool feeds or retracts by rotation.

3. The saddle-type bypass for online electrofusion connection according to claim 2, characterized in that: The branch end pipe is arranged at the sealing section position corresponding to the bypass body.

4. The saddle-type bypass for online electrofusion connection according to claim 3 is characterized in that: When the drilling tool completes retraction, the drilling head is higher than the branch end pipe.

5. The saddle-type bypass for online electrofusion connection according to claim 2, characterized in that: Sealing rings are respectively installed at both ends of the knife handle sealing section.

6. The saddle-type bypass for online electrofusion connection according to claim 2, characterized in that: The drilling cutter head comprises a plurality of cutting edges distributed along the circumferential direction, and the inner sides of the cutting edges are provided with positioning threads for positioning the cutting block.

7. The saddle-type bypass for online electrofusion connection according to claim 6, characterized in that: The portion of the cutting edge extending out of the drilling tool is in an equilateral triangle structure.

8. The saddle-type bypass for online electrofusion connection according to any one of claims 1 to 7, characterized in that: The electric heater is arranged on the inner wall of the arc-fitting sheet body. The exposed conductive parts include a conductive insert and a conductive terminal embedded in the arc-fitting sheet body. The conductive terminal and the conductive insert are threadedly connected.

9. The saddle-type bypass for online electrofusion connection according to claim 1, characterized in that: An observation window for observing the electric fusion situation is also provided on the arc bonding sheet.

10. The saddle-type bypass for online electrofusion connection according to claim 6, characterized in that: The tool is provided with a wedge groove adapted to the cam wedge, and the depth of the wedge groove is adapted to the cam wedge so that the cam wedge is flush with the inner wall of the feed tube. The cam wedge is in the shape of a dumbbell with large and round ends and a thin middle. The maximum distance from edge to edge of the cam wedge is greater than the distance from the sealing section of the tool holder to the inner wall of the threaded section of the feed tube. When the drilling tool reaches the preset stroke limit, the drilling tool only fits with one end of the cam wedge, and the end of the cam wedge separated from the drilling tool rotates with the movement of the drilling tool to limit the cutting block produced by the drilling tool or the hole.

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