Variable diameter pipe coupling and method of variable diameter coupling

Abstract

The application provides a variable-diameter pipeline connecting piece and a variable-diameter connecting method. The variable-diameter pipeline connecting piece is designed with a connecting piece body with bendable teeth, realizes the variable-diameter function of the pipeline connecting piece, can adapt to the pipeline connecting requirements of different pipe diameters, effectively reduces pipeline connecting nodes, reduces the occurrence of leakage hidden dangers, reduces the workload of maintenance, saves construction efficiency, reduces material consumption. The structural design of the teeth makes the variable-diameter process simple and stable, the setting of the maximum diameter and the minimum diameter ensures that the connecting piece can cover a wide range of pipe diameters, improves the degree of freedom of pipeline connection, saves larger diameter pipelines, optimizes the size of the floor sleeve, and improves the construction effect of fireproof plugging.

Description

Technical Field

[0001] This invention belongs to the field of multi-size pipe connection technology, specifically relating to a variable diameter pipe connector and a variable diameter connection method. Background Technology

[0002] Seamless steel pipes possess advantages such as high strength, good toughness, corrosion resistance, sealing properties, and stable hydraulic performance. Under normal operating conditions, they can withstand long-term pressure, water flow erosion, and environmental corrosion without easily experiencing damage or aging. Therefore, they are widely used in modern plumbing construction. To meet usage requirements, pipes are designed with different diameters and interconnected to form a plumbing system. Connections are made using fittings such as tees and reducers through welding. In traditional construction, standard tee fittings often fail to meet pipe laying requirements, necessitating the use of reducers on straight sections after tee connections. This increases workload and significantly increases the number of connection nodes and the amount of large-diameter pipes used. Since pipes are often laid under beams and slabs, failure to reduce diameter in time also leads to frequent increases in the diameter of pipes penetrating floor slabs, severely impacting construction efficiency, economy, and material usage.

[0003] Regarding the construction of multi-size seamless steel pipe pipelines, we will continue to develop an efficient construction method for connecting multi-size pipes using a variable diameter structure. Summary of the Invention

[0004] This invention provides a variable diameter pipe connector and a variable diameter connection method to solve the problem that standard tee fittings in the prior art cannot meet the requirements of pipe laying.

[0005] In a first aspect, the present invention provides a variable diameter pipe connector, including a connector body and a plurality of teeth; the connector body has at least two ports, the ports being the maximum diameter before the diameter change, and each port having a plurality of teeth capable of bending inward along the pipe extension direction;

[0006] The teeth are triangular, with the base connected to the port; after the teeth bend inward, the other two sides connect with the adjacent teeth to form the diameter of the pipe after the change.

[0007] The remaining length of the teeth forms a straight section along the pipe's extension direction, used for connection with the pipe;

[0008] The diameter of the tube formed by the inward bending of the teeth and their interconnection at the apex is the minimum diameter.

[0009] Compared with existing technologies, the advantages of this invention are as follows: The variable diameter pipe connector provided by this invention, through the design of a connector body with bendable teeth, realizes the variable diameter function of the pipe connector, which can adapt to the connection needs of pipes with different diameters, effectively reducing pipe connection nodes, reducing the occurrence of leakage risks, reducing maintenance workload, saving construction efficiency, and reducing material consumption. The tooth structure design makes the diameter changing process simple and stable, and the setting of the maximum and minimum diameters ensures that the connector can cover a wide range of pipe diameters, improves the freedom of pipe connection, saves on larger diameter pipes, optimizes the size of the floor slab sleeve, and improves the construction effect of fireproof sealing.

[0010] Furthermore, the number of teeth is calculated using Equation 1:

[0011] N=(DN) max / DN min Formula 1 (k)

[0012] In the formula, N represents the number of teeth, in units of DN; max DN is the maximum diameter, in mm. min is the minimum diameter, in mm; k is a coefficient, selected from 15 to 20.

[0013] Furthermore, it also includes an auxiliary deformation member, which has an abutting end and a force-applying end arranged opposite to each other. The abutting end is longer than the force-applying end. The abutting end is used to abut against the tooth to form a bend at this point, and the force-applying end is used to apply force to the tooth to bend it.

[0014] Furthermore, it also includes a measuring element, which is a graduated conical rod structure used to assist in measuring the pipe diameter after the bending teeth form a diameter change.

[0015] Furthermore, the connector body includes at least one of a two-way, a three-way, or a four-way connector.

[0016] Secondly, a variable diameter connection method is provided, which uses the variable diameter pipe connector described in the first aspect.

[0017] Furthermore, it includes the following steps:

[0018] (1) Determine the maximum and minimum diameters of the variable diameter pipe fittings based on the maximum and minimum diameters of the pipes to be connected;

[0019] (2) Mount the auxiliary deformable part onto the teeth of the editable pipe connector, and connect the teeth together with the apex angles inward;

[0020] (3) Insert the measuring piece into the port, bend the top of the teeth into a straight section until the pipe diameter to be connected is reached, and obtain the variable diameter pipe connector in use;

[0021] (4) Insert the teeth of the straight section into the inside of the pipe to be connected, weld them together, and weld them together at the tooth connection to complete the diameter change connection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the original state of the variable diameter pipe connector in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the variable diameter pipe connector in use according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of an auxiliary deformable component in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a measuring element in one embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Connector body; 2. Tooth; 201. Maximum diameter; 202. Minimum diameter; 203. Straight section; 3. Auxiliary deformation component; 301. Abutment end; 302. Force application end; 4. Measuring component. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0029] Please see Figures 1-4 In a first aspect, the present invention provides a variable diameter pipe connector, comprising a connector body 1 and a plurality of teeth 2; the connector body 1 has at least two ports, the ports being the maximum diameter 201 before the diameter change, and each port having a plurality of teeth 2 capable of bending inward along the pipe extension direction; the teeth 2 are triangular, with their bases connected to the ports; after the teeth 2 bend inward, their other two sides connect to adjacent teeth 2 to form the pipe diameter after the diameter change; the remaining length of the teeth 2 forms a straight section 203 along the pipe extension direction for connection to the pipe; the pipe diameter formed by the interconnection of the apexes of the teeth 2 after bending inward is the minimum diameter 202.

[0030] In this invention, the tooth 2 is an approximately triangular structure formed along the port of the connector, and its surface is an arc surface with the same curvature as the port.

[0031] The variable diameter pipe connector provided by this invention, through the design of a connector body 1 with bendable teeth 2, realizes the variable diameter function of the pipe connector, which can adapt to the connection needs of pipes with different diameters, effectively reducing pipe connection nodes, reducing the occurrence of leakage risks, reducing maintenance workload, saving construction efficiency, and reducing material consumption. The structural design of the teeth 2 makes the diameter changing process simple and stable. The setting of the maximum diameter 201 and the minimum diameter 202 ensures that the connector can cover a wide range of pipe diameters, improves the freedom of pipe connection, saves on larger diameter pipes, optimizes the size of the floor slab sleeve, and improves the construction effect of fireproof sealing.

[0032] Furthermore, the number of teeth is calculated using Equation 1:

[0033] N=(DN) max / DN min Formula 1 (k)

[0034] In the formula, N represents the number of teeth, in units of DN; max Maximum diameter 201, unit is mm; DN min The minimum diameter is 202, in mm; k is a coefficient, selected from 15 to 20.

[0035] The number of teeth was calculated using a formula to ensure that the number of teeth 2 matched the range of pipe diameter changes. The reasonable distribution of the number of teeth made the diameter change process more uniform, reduced local stress concentration, and improved the reliability and service life of the connector.

[0036] It is understandable that once the number of teeth is determined, the angle of the vertex of tooth 2 can be calculated based on the difference between the maximum diameter 201 and the minimum diameter 202, as well as the number of teeth.

[0037] In one specific embodiment, an auxiliary deformation member 3 is also included. The auxiliary deformation member 3 has an abutting end 301 and a force-applying end 302 disposed opposite to each other. The abutting end 301 is longer than the force-applying end 302. The abutting end 301 is used to abut against the tooth 2 to form a bend at this location, and the force-applying end 302 is used to apply force to the tooth 2 to bend it.

[0038] The auxiliary deformation component 3 makes the bending process of the tooth 2 more precise and efficient, further reducing errors caused by manual operation. The structure of the abutment end 301 and the force-applying end 302 ensures that the tooth 2 can be subjected to uniform force, avoiding inaccurate deformation or damage to the connecting parts caused by uneven force.

[0039] In one specific embodiment, the measuring element 4 is a tapered rod structure with graduations, used to assist in measuring the diameter of the pipe after the bending teeth 2 form a diameter change.

[0040] The introduction of measuring component 4 further improves the accuracy of the diameter reduction process, ensuring that the diameter of the pipe after the diameter reduction is consistent with the diameter of the pipe to be connected; the tapered rod structure with graduations makes the measurement process more intuitive and convenient, reducing connection failures or rework caused by inaccurate measurements.

[0041] Optionally, the connector body 1 includes at least one of a two-way, a three-way, or a four-way connector.

[0042] Secondly, the present invention provides a variable diameter connection method, which uses the variable diameter pipe connector described in the first aspect.

[0043] Specifically, it includes the following steps:

[0044] (1) Determine the maximum diameter 201 and minimum diameter 202 of the variable diameter pipe connector based on the maximum diameter 201 and minimum diameter 202 of the pipe to be connected;

[0045] (2) Mount the auxiliary deformable part 3 onto the teeth 2 of the editable pipe connector, and connect the teeth 2 together with the apex angles inward;

[0046] (3) Insert the measuring piece 4 into the port, bend the top of the tooth 2 into a straight section 203 until the pipe diameter to be connected is reached, and obtain the variable diameter pipe connector in use.

[0047] (4) Insert the teeth 2 of the straight section 203 into the inside of the pipe to be connected, and weld them together. Weld them together at the connection of the teeth 2 to complete the diameter change connection.

[0048] The above steps ensured the standardization and operability of the construction process. Precise deformation and measurement procedures ensured a perfect match between the diameter-reduced connectors and the pipes to be connected, reducing the risk of leakage and maintenance workload, and improving the overall performance and construction efficiency of the pipeline system.

[0049] Furthermore, first review the construction drawings, and prepare the appropriate quantity of variable diameter pipe connectors and fittings for the maximum diameter 201 and minimum diameter 202 according to the drawings.

[0050] According to construction requirements, the original variable diameter pipe connector is deformed and modified. The auxiliary deformation part 3 is installed on the teeth 2 of the variable diameter pipe connector. The teeth 2 are deformed inward to the required position, and each tooth 2 is corrected to the appropriate position in a counterclockwise or clockwise order. Using a graduated conical rod-shaped measuring part 4, the tip of the tooth 2 is bent to be perpendicular. The bending length is adjusted according to the required diameter to adjust the variable diameter pipe connector to the working state.

[0051] After adjusting the ports of the variable diameter pipe connector in each direction, connect the pipes, insert the tip of the tooth 2 of the straight section 203 into the inside of the connecting pipe, and weld the connection. Weld the connection at the tooth 2 joint.

[0052] After welding is completed, non-destructive testing of the welding and pressure testing of the water pipes are carried out. After the tests are completed, anti-corrosion and heat preservation construction is carried out.

[0053] The following detailed description of the variable diameter pipe connector and variable diameter connection method provided by the present invention will be provided through specific embodiments. Example

[0054] (1) Review the construction drawings. The construction drawings show that the underfloor heating water supply and return pipes are connected by seamless steel pipes. The main pipe is DN65 seamless steel pipe and the branch pipe is DN32. After checking, the standard tee fitting does not have this size. The maximum diameter 201 is 65 and the minimum diameter 202 is 32 to obtain a variable diameter tee.

[0055] (2) Modify the original variable diameter tee by deformation, and install the auxiliary deformation part 3 on the teeth 2 of the variable diameter tee. Deform the teeth 2 inward to the innermost position, and straighten each tooth 2 to its position in a counterclockwise or clockwise order. Use a graduated conical rod-shaped measuring tool 4 to bend the tip of the teeth 2 to be perpendicular until the DN32 size of the measuring tool can enter the pipe, and bend the remaining length along the pipe direction. At this time, the variable diameter tee has been adjusted to the working state.

[0056] (3) After adjusting the three directions of the tee, connect the pipes, insert the tip of the tooth 2 of the straight section 203 into the inside of the connecting pipe, and weld the connection. Weld the connection at the tooth 2 connection.

[0057] (4) After welding is completed, non-destructive testing of welding and water pipe pressure test are carried out. After the test is completed, anti-corrosion and heat preservation construction is carried out.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should all be considered to be within the protection scope of the present invention.

Claims

1. A variable diameter pipe coupling, comprising: The variable-diameter pipe connector comprises a connector body and a plurality of teeth; the connector body has at least two ports, each of which has a maximum diameter before variable-diameter change; a plurality of inwardly foldable teeth are arranged on each port along the pipe extension direction; The teeth are triangular, with the base connected to the port; after the teeth are folded inward, the other two waist edges are connected to the adjacent teeth to form the pipe diameter after variable-diameter change; The remaining length of the teeth forms a flat section along the pipe extension direction for pipe connection; The pipe diameter formed by the top corners of the teeth after being folded inward is the minimum diameter; The number of teeth is calculated by formula 1: N = (DN max / DN min ) * k Equation 1 In the formula, N is the number of teeth, unit: pieces; DN max is the maximum diameter, unit: mm; DN min is the minimum diameter, unit: mm; k is a coefficient, selected from 15 to 20; The variable-diameter pipe connector further comprises an auxiliary deformation member, which has an abutting end and a force applying end arranged oppositely; the abutting end is longer than the force applying end; the abutting end is used to abut against the teeth to form a fold thereat, and the force applying end is used to apply force to the teeth to fold them; The variable-diameter pipe connector further comprises a measuring member, which is a tapered rod-shaped structure with scales, used to assist and measure the pipe diameter after the folded teeth form variable-diameter change.

2. The variable diameter pipe coupling set forth in claim 1, wherein, The connector body comprises at least one of two-way, three-way or four-way.

3. A method of variable diameter connection, characterized by, The variable-diameter pipe connector of claim 1 or 2 is used.

4. The method of variable connection according to claim 3, wherein, The method comprises the following steps: (1) determining the maximum diameter and the minimum diameter of the variable-diameter pipe connector according to the maximum diameter and the minimum diameter of the pipe to be connected; (2) clamping the auxiliary deformation member on the teeth of the variable-diameter pipe connector, and folding the teeth inward to the top corners; (3) inserting the measuring member into the port, folding the tooth top into a flat section, and reaching the pipe diameter of the pipe to be connected to obtain the variable-diameter pipe connector in use; (4) sleeving the flat section of the teeth into the inside of the pipe to be connected, welding connection, and welding connection at the tooth connection to complete the variable-diameter connection.

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