Lengthened PE (Poly Ethylene) electric melting pipe fitting for maintenance

Abstract

The utility model provides a lengthened PE (Poly Ethylene) electric melting pipe fitting for maintenance, which comprises five types of electric melting straight joints, electric melting 90-degree equal-length elbows, electric melting 90-degree unequal-length elbows, electric melting regular tee joints and electric melting flanges, and the electric melting straight joints, the electric melting 90-degree equal-length elbows, the electric melting 90-degree unequal-length elbows, the electric melting regular tee joints and the electric melting flanges are all provided with lengthened electric melting pipe joints which are longer than the conventional sizes. When a pipeline is maintained, the lengthened PE electric melting pipe fitting is used for replacing a damaged PE electric melting pipe fitting with the conventional size, one-to-one replacement can be achieved, additional electric melting pipe fittings and auxiliary connecting pipes do not need to be additionally arranged, pipes can be saved, the workload can be greatly reduced, maintenance is more convenient and efficient, the maintenance time can be saved, and the maintenance efficiency is improved. And water supply and gas supply are quickly recovered.

Description

Technical Field

[0001] The utility model relates to a PE electrofusion fitting, in particular to an extended PE electrofusion fitting for maintenance, which is used to replace damaged conventional-size PE electrofusion fittings during maintenance and belongs to the technical field of building installation water supply and gas supply pipeline equipment. Background Art

[0002] At present, in the water supply and gas supply pipelines of building installation, the application of PE steel wire mesh pipes is becoming more and more common. The joints of PE steel wire mesh pipes are generally connected by PE electrofusion fittings. During the long-term use of the installed PE steel wire mesh pipeline, due to the influence of human or environmental factors, leakage or air leakage often occurs at the pipe joints. When maintaining, it is necessary to replace the damaged electrofusion fitting at the joint. However, the electrofusion fitting is melted into one body with the pipe head of the PE steel wire mesh pipe and cannot be removed separately. To replace the damaged electrofusion fitting, it is necessary to cut off both the electrofusion fitting and the inserted pipe head. Since the laid PE steel wire mesh pipeline generally cannot move axially back and forth, after cutting off a damaged electrofusion fitting on the pipeline, the pipe head of the pipeline becomes shorter and cannot be directly replaced with an electrofusion fitting of the same specification. For example, to replace an electrofusion straight joint, it is necessary to cut off an additional section of the connecting pipeline at both ends of the electrofusion straight joint, and then use two electrofusion straight joints plus a section of auxiliary connecting pipe for replacement; to replace an electrofusion 90° elbow, it is necessary to cut off an additional section of the connecting pipeline at both ends of the electrofusion 90° elbow, and then use an electrofusion 90° elbow plus two electrofusion straight joints plus two sections of auxiliary connecting pipes for replacement.

[0003] Thus, it can be seen that when using conventional-size PE electrofusion fittings as maintenance replacement parts at present, additional electrofusion fittings and auxiliary connecting pipes are needed for replacement, and the work is quite cumbersome, which not only consumes more materials but also delays the maintenance time and affects the rapid restoration of water supply and gas supply. Content of the Utility Model

[0004] The purpose of the utility model is to provide an extended PE electrofusion fitting for maintenance, which is used to replace damaged conventional-size PE electrofusion fittings during maintenance. When replacing with it, no additional electrofusion fittings and auxiliary connecting pipes are needed, the maintenance is convenient and efficient, the maintenance time can be saved, and the water supply and gas supply can be quickly restored.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An extended PE electrofusion fitting for repair, the electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is an electrofusion straight-through, the electrofusion pipe joints at both ends of the electrofusion straight-through adopt extended pipe joints. The inner hole of the electrofusion straight-through is a smooth and unobstructed straight through-hole, and the fusion zones of the two electrofusion pipe joints are both arranged near the ends. The length of the electrofusion straight-through is L, the length of the fusion zone is L1, and the inner hole diameter is D. Then there is

[0007] L = 5 × ROUND((1.12 × D + 205) / 5, 0);

[0008] L1 = ROUND((0.27 × D + 10), 0);

[0009] D = the nominal diameter DN of the electrofusion straight-through, with the unit of mm;

[0010] The ROUND(number, num_digits) function rounds the numerical value to the specified number of decimal places.

[0011] An extended PE electrofusion fitting for repair, the electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is a 90° equal-length electrofusion elbow, the electrofusion pipe joints at both ends of the 90° equal-length electrofusion elbow adopt extended pipe joints. The fusion zones of the two electrofusion pipe joints are both arranged near the ends, and the two electrofusion pipe joints are both provided with plug-in step holes extending inward from the ends. The distance from the end face of one electrofusion pipe joint of the 90° equal-length electrofusion elbow to the axis line of the other electrofusion pipe joint is L, the length of the fusion zone is L1, the plug-in depth of the plug-in step hole is L2, and the diameter of the plug-in step hole is D. Then there is

[0012] L = 5 × ROUND((1.02 × D + 120) / 5, 0);

[0013] L1 = ROUND((0.27 × D + 10), 0);

[0014] L2 = 5 × ROUND((0.38 × D + 27) / 5, 0);

[0015] D = the nominal diameter DN of the 90° equal-length electrofusion elbow, with the unit of mm;

[0016] The ROUND(number, num_digits) function rounds the numerical value to the specified number of decimal places.

[0017] An extended PE electrofusion fitting for repair, the electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is an unequal-length electrofusion 90° elbow, one electrofusion pipe joint at one end of the unequal-length electrofusion 90° elbow adopts an extended pipe joint, and the other electrofusion pipe joint adopts a non-extended pipe joint. The fusion zones of the two electrofusion pipe joints are both arranged at positions close to the ends, and both electrofusion pipe joints are provided with plug-in step holes extending inwards from the ends; the distance from the end face of the extended electrofusion pipe joint of the unequal-length electrofusion 90° elbow to the axis line of the non-extended electrofusion pipe joint is L, the distance from the end face of the non-extended electrofusion pipe joint to the axis line of the extended electrofusion pipe joint is H, the fusion zone length is L1, the plug-in depth of the plug-in step hole is L2, and the aperture of the plug-in step hole is D. Then there is

[0018] L = 5 × ROUND((1.02 × D + 120) / 5, 0);

[0019] H = 5 × ROUND((0.79 × D + 35) / 5, 0);

[0020] L1 = ROUND((0.27 × D + 10), 0);

[0021] L2 = 5 × ROUND((0.38 × D + 27) / 5, 0);

[0022] D = the nominal diameter DN of the unequal-length electrofusion 90° elbow, with the unit of mm;

[0023] The ROUND(number, num_digits) function rounds a numeric value to a specified number of decimal places.

[0024] An extended PE electrofusion fitting for repair, the electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is an electrofusion straight tee, the electrofusion pipe joints at both ends of the straight-through pipeline of the electrofusion straight tee both adopt extended pipe joints, and the non-electrofusion pipe joint connected to the middle of the straight-through pipeline adopts a non-extended pipe joint. The inner hole of the straight-through pipeline is a smooth and unobstructed straight through-hole, and the fusion zones of the two electrofusion pipe joints are both arranged at positions close to the ends; the length of the straight-through pipeline of the electrofusion straight tee is L, the fusion zone length is L1, the inner hole diameter of the straight-through pipeline and the outer diameter of the non-electrofusion pipe joint are both D, and the distance from the end face of the non-electrofusion pipe joint to the axis line of the straight-through pipeline is L3. Then there is

[0025] L = 5 × ROUND((2.25 × D + 180) / 5, 0);

[0026] L1 = ROUND((0.27 × D + 10), 0);

[0027] L3 = 5 × ROUND((0.98 × D + 44) / 5, 0);

[0028] D = nominal diameter DN of the electrofusion straight tee, unit: mm;

[0029] The ROUND(number, num_digits) function rounds a numeric value to a specified number of decimal places.

[0030] An extended PE electrofusion fitting for repair, the electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is an electrofusion flange, the electrofusion pipe joint of the electrofusion flange neck pipe uses an extended pipe joint. The fusion zones of the electrofusion pipe joints are all arranged at positions close to the end of the neck pipe. The electrofusion pipe joint is provided with an inserted step hole extending inward from the end of the neck pipe; the distance from the end face of the neck pipe of the electrofusion flange to the flange end face is L, the fusion zone length is L1, the inserted depth of the inserted step hole is L2, and the aperture of the inserted step hole is D, then there is

[0031] L = 5 × ROUND((51 × LN(D) - 39) / 5, 0);

[0032] L1 = ROUND((33 × LN(D) - 76), 0);

[0033] L2 = 5 × ROUND((39 × LN(D) - 93) / 5, 0);

[0034] D = nominal diameter DN of the electrofusion flange, unit: mm;

[0035] The ROUND(number, num_digits) function rounds a numeric value to a specified number of decimal places;

[0036] The LN() function is a logarithmic function with the natural constant e as the base.

[0037] The extended PE electrofusion fittings of the present invention include 5 types, such as electrofusion straight, electrofusion 90° equal-length elbow, electrofusion 90° unequal-length elbow, electrofusion straight tee, and electrofusion flange. They are all provided with extended electrofusion pipe joints that are longer than the conventional dimensions. When using this extended PE electrofusion fitting to replace the damaged conventional-size PE electrofusion fitting during pipeline repair, one-to-one replacement can be achieved, and there is no need to add additional electrofusion fittings and auxiliary connecting pipes. It can not only save pipe materials, but also greatly reduce the workload, making the repair more convenient and efficient, thus saving repair time and quickly restoring water and gas supply. Description of the Drawings

[0038] Figure 1 It is a cross-sectional view of the extended PE electrofusion straight.

[0039] Figure 2 It is a cross-sectional view of the extended PE electrofusion 90° equal-length elbow.

[0040] Figure 3It is a sectional view of an extended PE electrofusion 90° unequal-length elbow.

[0041] Figure 4 It is a sectional view of an extended PE electrofusion straight tee.

[0042] Figure 5 It is a sectional view of an extended PE electrofusion flange.

[0043] Figure 6 It is a sectional view of a conventional-size PE electrofusion straight joint.

[0044] Figure 7 It is a sectional view of a conventional-size PE electrofusion 90° elbow.

[0045] Figure 8 It is a sectional view of a conventional-size PE electrofusion straight tee.

[0046] Figure 9 It is a sectional view of a conventional-size PE electrofusion flange. Detailed implementation manners

[0047] The following further describes the present utility model in conjunction with the accompanying drawings.

[0048] When the extended PE electrofusion pipe fitting is an electrofusion straight joint, as Figure 1 shown, the electrofusion pipe joints at both ends of the electrofusion straight joint both adopt extended pipe joints. The inner hole of the electrofusion straight joint is a smooth and unobstructed straight through-hole, and the fusion zones of the two electrofusion pipe joints are both arranged at positions close to the ends; according to the foregoing parameter definitions and formula calculations, the specific dimension parameters of each common specification of this extended electrofusion straight joint are as follows:

[0049]

[0050] For comparison, a conventional-size PE electrofusion straight joint is as Figure 6 shown. There is an obstruction in the middle of its inner hole, its insertion hole depth is L2, and the other parameters D, L, and L1 have the same definitions as the corresponding parameters of the extended electrofusion straight joint. The specific dimension parameters of each common specification are as follows:

[0051]

[0052] By comparison, it can be seen that the length L of this extended electrofusion straight joint is much greater than the length L of the conventional-size electrofusion straight joint. When a conventional-size electrofusion straight joint on the pipeline is damaged, this extended electrofusion straight joint can be used for replacement. Cut off the damaged conventional-size electrofusion straight joint together with part of the pipe material according to the length of this extended electrofusion straight joint, and then sleeve this extended electrofusion straight joint on the remaining pipeline for electrofusion jointing.

[0053] When the extended PE electrofusion pipe fitting is an electrofusion 90° equal-length elbow, as Figure 2As shown in the figure, the electrofusion pipe joints at both ends of the electrofusion 90° equal-length elbow adopt extended pipe joints. The fusion zones of the two electrofusion pipe joints are both set near the ends, and the two electrofusion pipe joints are both provided with inserted step holes extending inwards from the ends. According to the above-mentioned parameter definitions and formula calculations, the specific dimension parameters of each common specification of this extended electrofusion 90° equal-length elbow are as follows:

[0054]

[0055] When this extended PE electrofusion fitting is an electrofusion 90° unequal-length elbow, as Figure 3 shown in the figure, one electrofusion pipe joint of the electrofusion 90° unequal-length elbow adopts an extended pipe joint, and the other electrofusion pipe joint adopts a non-extended pipe joint. The fusion zones of the two electrofusion pipe joints are both set near the ends, and the two electrofusion pipe joints are both provided with inserted step holes extending inwards from the ends. According to the above-mentioned parameter definitions and formula calculations, the specific dimension parameters of each common specification of this extended electrofusion 90° unequal-length elbow are as follows:

[0056]

[0057] For comparison, the conventional-size PE electrofusion 90° elbow, as Figure 7 shown in the figure, has the same parameter definitions for D, L, L1, and L2 as those of the extended electrofusion equal-length elbow. The specific dimension parameters of each common specification are as follows:

[0058]

[0059] It can be seen from the comparison that the length L of both this extended electrofusion 90° equal-length elbow and the extended electrofusion 90° unequal-length elbow is much greater than the length L of the conventional-size electrofusion 90° elbow. When the conventional-size electrofusion 90° elbow on the pipeline is damaged, this extended electrofusion 90° equal-length elbow or the extended electrofusion 90° unequal-length elbow can be used for replacement according to its usage scenario. If the damaged elbow is connected to the pipeline at both ends, cut off the damaged conventional-size electrofusion 90° elbow together with part of the pipe according to the length of this extended electrofusion 90° equal-length elbow, and then sleeve this extended electrofusion 90° equal-length elbow onto the remaining pipeline for electrofusion joining. If one end of the damaged elbow is connected to the pipeline and the other end is connected to other fittings, it is necessary to cut off the damaged conventional-size electrofusion 90° elbow and the other connected fittings together, and then sleeve the extended electrofusion 90° unequal-length elbow and the new other fittings onto the remaining pipeline for electrofusion joining.

[0060] When this extended PE electrofusion fitting is an electrofusion straight tee, as Figure 4As shown in the figure, the electrofusion pipe joints at both ends of the straight-through pipeline of the electrofusion positive tee are all extended pipe joints, and the non-electrofusion pipe joint connected to the middle of the straight-through pipeline uses a non-extended pipe joint. The inner hole of the straight-through pipeline is a smooth and unobstructed straight-through hole, and the fusion zones of the two electrofusion pipe joints are both set near the ends; according to the above-mentioned parameter definitions and formula calculations, the specific dimension parameters of each common specification of this extended electrofusion positive tee are as follows:

[0061]

[0062] For comparison, the conventional size PE electrofusion positive tee is as Figure 8 shown. The parameters D, L, L1, and L3 have the same definitions as the corresponding parameters of the extended electrofusion positive tee. The specific dimension parameters of each common specification are as follows:

[0063]

[0064] It can be seen from the comparison that the length L of this extended electrofusion positive tee is much larger than the length L of the conventional size electrofusion positive tee. When the conventional size electrofusion positive tee on the pipeline is damaged, according to the length of this extended electrofusion positive tee, the damaged conventional size electrofusion positive tee and part of the pipe are simultaneously cut off, and this extended electrofusion positive tee is sleeved on the remaining pipeline for electrofusion jointing. The pipe fittings connected to the non-electrofusion pipe joint of the damaged electrofusion positive tee also need to be cut off and replaced with corresponding extended pipe fittings.

[0065] When this extended PE electrofusion fitting is an electrofusion flange, as Figure 5 shown, the electrofusion pipe joint of the electrofusion flange neck pipe uses an extended pipe joint. The fusion zones of the electrofusion pipe joints are both set near the ends of the neck pipe. The electrofusion pipe joint is provided with an insertion step hole extending inward from the end of the neck pipe; according to the above-mentioned parameter definitions and formula calculations, the specific dimension parameters of each common specification of this extended electrofusion flange are as follows:

[0066]

[0067] For comparison, the conventional size PE electrofusion flange is as Figure 9 shown. The parameters D, L, L1, and L2 have the same definitions as the corresponding parameters of the extended electrofusion flange. The specific dimension parameters of each common specification are as follows:

[0068]

[0069] By comparison, it can be seen that the length L of this lengthened electrofusion flange is much greater than the length L of the electrofusion flange with conventional dimensions. When the electrofusion flange with conventional dimensions on the pipeline is damaged, this lengthened electrofusion flange can be used for replacement. Cut off the damaged electrofusion flange with conventional dimensions and part of the pipe according to the length of this lengthened electrofusion flange, and then sleeve this lengthened electrofusion flange on the remaining pipeline for electrofusion bonding.

[0070] The above illustrations are only typical embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An extended PE electrofusion fitting for repair, characterized in that: The electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is a straight electrofusion fitting, the electrofusion pipe joints at both ends of the straight electrofusion fitting both adopt extended pipe joints. The inner hole of the straight electrofusion fitting is a smooth and unobstructed straight through-hole, and the fusion zones of the two electrofusion pipe joints are both arranged near the ends. The length of the straight electrofusion fitting is L, the length of the fusion zone is L1, and the inner hole diameter is D. Then there is L = 5 × ROUND((1.12 × D + 205) / 5, 0); L1 = ROUND((0.27 × D + 10), 0); D = the nominal diameter DN of the straight electrofusion fitting, with the unit of mm; The ROUND(number, num_digits) function rounds a numeric value to the specified number of decimal places.

2. An extended PE electrofusion fitting for repair, characterized in that: The electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is a 90° equal-length elbow electrofusion fitting, the electrofusion pipe joints at both ends of the 90° equal-length elbow electrofusion fitting both adopt extended pipe joints. The fusion zones of the two electrofusion pipe joints are both arranged near the ends, and the two electrofusion pipe joints are both provided with inserted step holes extending inward from the ends. The distance from the end face of one electrofusion pipe joint of the 90° equal-length elbow electrofusion fitting to the axis line of the other electrofusion pipe joint is L, the length of the fusion zone is L1, the inserted depth of the inserted step hole is L2, and the diameter of the inserted step hole is D. Then there is L = 5 × ROUND((1.02 × D + 120) / 5, 0); L1 = ROUND((0.27 × D + 10), 0); L2 = 5 × ROUND((0.38 × D + 27) / 5, 0); D = the nominal diameter DN of the 90° equal-length elbow electrofusion fitting, with the unit of mm; The ROUND(number, num_digits) function rounds a numeric value to the specified number of decimal places.

3. An extended PE electrofusion fitting for repair, characterized in that: The electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is a 90° unequal-length elbow electrofusion fitting, one electrofusion pipe joint at one end of the 90° unequal-length elbow electrofusion fitting adopts an extended pipe joint, and the other electrofusion pipe joint adopts a non-extended pipe joint. The fusion zones of the two electrofusion pipe joints are both arranged near the ends, and the two electrofusion pipe joints are both provided with inserted step holes extending inward from the ends. The distance from the end face of the extended electrofusion pipe joint of the 90° unequal-length elbow electrofusion fitting to the axis line of the non-extended electrofusion pipe joint is L, the distance from the end face of the non-extended electrofusion pipe joint to the axis line of the extended electrofusion pipe joint is H, the length of the fusion zone is L1, the inserted depth of the inserted step hole is L2, and the diameter of the inserted step hole is D. Then there is L = 5 × ROUND((1.02 × D + 120) / 5, 0); H = 5 × ROUND((0.79 × D + 35) / 5, 0); L1 = ROUND((0.27 × D + 10), 0); L2 = 5 × ROUND((0.38 × D + 27) / 5, 0); D = the nominal diameter DN of the 90° unequal-length elbow electrofusion fitting, with the unit of mm; The ROUND(number, num_digits) function rounds a numeric value to the specified number of decimal places.

4. An extended PE electrofusion fitting for repair, characterized in that: The electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is an electrofusion straight tee, the electrofusion pipe joints at both ends of the straight-through pipeline of the electrofusion straight tee both adopt extended pipe joints, and the non-electrofusion pipe joint connected to the middle of the straight-through pipeline adopts a non-extended pipe joint. The inner hole of the straight-through pipeline is a smooth and unobstructed straight through-hole, and the fusion zones of the two electrofusion pipe joints are both arranged at positions close to the ends; the length of the straight-through pipeline of the electrofusion straight tee is L, the length of the fusion zone is L1, the inner hole diameter of the straight-through pipeline and the outer diameter of the non-electrofusion pipe joint are both D, and the distance from the end face of the non-electrofusion pipe joint to the axis line of the straight-through pipeline is L3. Then there is L = 5 × ROUND((2.25 × D + 180) / 5, 0); L1 = ROUND((0.27 × D + 10), 0); L3 = 5 × ROUND((0.98 × D + 44) / 5, 0); D = the nominal diameter DN of the electrofusion straight tee, with the unit of mm; The ROUND(number, num_digits) function rounds a numeric value to the specified number of decimal places.

5. An extended PE electrofusion fitting for repair, characterized in that: The electrofusion fitting is provided with an extended electrofusion fitting head. When the electrofusion fitting is an electrofusion flange, the electrofusion pipe joint of the electrofusion flange neck pipe adopts an extended pipe joint, the fusion zones of the electrofusion pipe joints are both arranged at positions close to the ends of the neck pipe, and the electrofusion pipe joint is provided with an insertion step hole extending inward from the end of the neck pipe; the distance from the end face of the neck pipe of the electrofusion flange to the flange end face is L, the length of the fusion zone is L1, the insertion depth of the insertion step hole is L2, and the diameter of the insertion step hole is D. Then there is L = 5 × ROUND((51 × LN(D) - 39) / 5, 0); L1 = ROUND((33 × LN(D) - 76), 0); L2 = 5 × ROUND((39 × LN(D) - 93) / 5, 0); D = the nominal diameter DN of the electrofusion flange, with the unit of mm; The ROUND(number, num_digits) function rounds a numeric value to the specified number of decimal places; The LN() function is the natural logarithm function with the base of the natural constant e.

Images