CN202200549U - Hand-hold plug-in pipe hot-melt welding device being capable of eliminating blockage - Google Patents

Abstract

The utility model discloses a hand-hold plug-in pipe hot-melt welding device being capable of eliminating blockage, which is used for welding thermoplastic pipes (such as PP, PE and PB pipes), and is used for eliminating pipe blockage, and reducing pipe abandonment or accident and loss caused by pump consumption while ensuring non leakage of a welded part. The device comprises a temperature detector, a plug-in hot-melt welder and a controller. During the welding operation, if the observation area of the welded part reaches the safe welding temperature value, the controller turns off the power supply of an electrical heater and reminds the operator of performing plug-in connection, now the welding is finished. The temperature detector can adopt an infrared temperature measuring technology or other technologies, and a numerical model which is used for calculating safe welding temperature value for different materials, different pipe diameter, different temperature and different initial temperature is programmed in the controller. The technology is particularly suitable for fast welding on thermoplastic pipes in construction sites, such as ground source heat pumps and radiation end sites.

Description

A kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction

Technical field

The utility model relates to the ground buried pipe of ground source heat pump heat exchanger tube welding equipment of HVAC field of engineering technology; Relate in particular to a kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction; Be applicable to polyethylene pipe or Polybutylene Pipe welding under other occasions; Specifically be meant and utilize the infrared temperature induction installation to measure tubing weld temperature,, improve the purpose that is welded into power to reach through the heating of this temperature control welder.

Background technology

Utilization is that building carries out heating and refrigerating with ground surface soil or water source as the earth source heat pump of cold/heat source, has become in recent years the hot technology of building energy conservation both at home and abroad.And the heat transfer property and the operational reliability of ground source heat exchanger are the keys of this type power-saving technology success or not.Ground heat exchanger adopts polyethylene pipe or Polybutylene Pipe usually.The quality of polyethylene pipe or Polybutylene Pipe pipe-line system interconnection technique is directly connected to the operational effect and the service life of buried guard system.The welding general principle is that polyethylene generally can be melted in the scope between 190-240 ℃, at this moment if tubing (or pipe fitting) two melted portion are fully contacted, and maintains suitable pressure, just can combine together securely after the cooling.Owing to be the body welding between the polythene material, so the intensity of joint is identical with the intensity of tubing itself.

Conventional hand-held spigot-and-socket sweat soldering device welding comprises electric heating device, two heating mould formers, two heating mould formpistons, power supply circuits and electric welding machine shells; Wherein, Said power supply circuits are located in the said electric welding machine shell; Said electric heating device is located at the upper end of said electric welding machine shell; Two heating mould formers are individually fixed in through hold-down screw on the leading flank of said electric heating device, and two heating mould formpistons are individually fixed on the trailing flank of said electric heating device through hold-down screw, and relative with the position of two heating mould formers respectively; Said electric heating device is electrically connected with said power supply circuits, and by said power supply circuits power supply.

Use conventional hand-held spigot-and-socket sweat soldering device welding, two pipe ends that needs connect, with a thicker pipeline section both ends heat welded of accepting, each joint needs twice reflow process respectively.In work progress, take place because heat time heating time is oversize through regular meeting, tubing heating place fusing amount is too much; Cause welding quality to reduce; Weld partly stops up even stops up fully, and wherein part is blocked in the hydraulic pressure test in later stage and also is difficult to find, will cause the water route resistance to increase; Increase pump power, even can cause the obstruction fully of pipeline.

Summary of the invention

The purpose of the utility model is to overcome the defective of prior art and a kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction is provided; When using the welding of this device, can avoid melting that deficiency causes repeats to heat or line clogging that excess molten causes.

The purpose of the utility model is achieved in that

A kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction of the utility model; Comprise electric heating device, heating mould former, heating mould formpiston, power supply circuits and electric welding machine shell; Said power supply circuits are located in the said electric welding machine shell; Said electric heating device is located at the upper end of said electric welding machine shell, and the heating mould former is fixed in through fixed screw on the leading flank of said electric heating device, and the heating mould formpiston is fixed on the trailing flank of said electric heating device through fixed screw; And it is relative with the position of heating mould former; Said electric heating device is electrically connected with said power supply circuits, and said hand-held spigot-and-socket pipe hot melting welder also comprises temperature controller and hygrosensor, and said temperature controller is located on the electric welding machine shell; And between being electrically connected of said electric heating device and said power supply circuits; On the said electric heating device and the center that is positioned at said heating mould former bottom is provided with the printing opacity mouth of inclination, and said hygrosensor is located in the said printing opacity mouth, and links to each other with said temperature controller.

The above-mentioned a kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction; Wherein, Said temperature controller comprises control circuit and temperature display element, and said control circuit is located in the electric welding machine shell, and between being electrically connected of said electric heating device and said power supply circuits; Said temperature display element is located at a side of electric welding machine shell, and links to each other with said control circuit.

The above-mentioned a kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction; Wherein, Said hygrosensor comprises that temperature sensitive member, temperature sensitive member over cap and temperature signal become and send element; Said temperature sensitive member places in the electric heating device obliquely, and its top ends closes on the said electric heating device printing opacity mouth bottom, and the incline direction of said temperature sensitive member is consistent with pairing printing opacity mouth incline direction; Said temperature sensitive member becomes through said temperature signal send element to link to each other with said control circuit, and said temperature sensitive member over cap covers on the said temperature sensitive member.

The above-mentioned a kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction, wherein, said temperature sensitive member is the infrared temperature sensing element.

Because the most frequently used in the earth source heat pump pipe laying connects is to accept pipe fitting through use to carry out attended operation, main accept pipe fitting comprise straight-through, threeway or elbow.Usually the wall thickness of accepting pipe fitting will be thicker than the tubing that will connect; So the utility model welder is only measured the inner wall temperature of the tubing that will connect; The heating mould cavity side is reserved inclination printing opacity mouth on the electric heating device of this welder; Heating mould former and formpiston use screw to be connected and fixed on the electric heating device, and be detachable in the time need not using.The size of the heating mould former of installing can be the DN25 commonly used in the earth source heat pump work progress or the former of DN32 caliber, but is not limited to this two kinds of sizes.Because this device can adopt the infrared temperature sensitive member of two covers, can use the mould of two kinds of sizes to heat during use simultaneously, also can only carry out a kind of heating of size mould.The infrared temperature sensing element is installed in the electric heating device of heating mould former bottom, and it is tilted, make its temperature of sensing for connecting the temperature at pipeline solder bond place.It is protection infrared temperature sensing element that the temperature sensitive member over cap mainly acts on, and prevents in the work progress its infringement that causes.

The utility model is suitable for spigot-and-socket hot melt attended operation fast in the work progress, can be implemented in the earth source heat pump connection pipeline work progress and accomplish pipeline welding work accurately, improves welding efficiency and success rate.

Adopt the welder of the utility model to carry out welding operation, can not cause pipeline blockage and increase pipe resistance, reduce pump energy consumption.

The utility model adopts the infrared measurement of temperature element, measures simply, and fast, durability is strong, and precision meets the demands.The temperature of the thin side of a measuring tube wall thickness has reduced cost simultaneously, improves ease for use, can satisfy instructions for use fully.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the temperature control principle figure that the utility model adopts;

Fig. 4 is the reference diagram when carrying out fusion temperature calculating.

The specific embodiment

To combine accompanying drawing that the utility model is described further below.

See also Fig. 1 and Fig. 2, the structural representation that the utility model can be eliminated the hand-held spigot-and-socket pipe hot melting welder of obstruction has been shown among the figure, this welder comprises electric heating device 8; Heating mould former 41,42, heating mould formpiston 91,92, power supply circuits 2 and electric welding machine shell 3; Power supply circuits 2 are located in the electric welding machine shell 3; Electric heating device 8 is located at the upper end of electric welding machine shell 8, and heating mould former 41,42 is fixed on the leading flank of electric heating device 8 through fixed screw, and heating mould formpiston 91,92 is fixed on the trailing flank of electric heating device 8 through fixed screw; Heating mould formpiston 91 is positioned at the back side of heating mould former 41; Heating mould formpiston 92 is positioned at the back side of heating mould former 42, and electric heating device 8 is electrically connected with power supply circuits 1, on the electric heating device 8 and the center that is positioned at heating mould former 41,42 bottoms be equipped with the printing opacity mouth 81,82 of inclination; Wherein printing opacity mouth 81 is downward-sloping; Printing opacity mouth 82 is inclined upwardly, and the utility model welder also comprises temperature controller and hygrosensor, and temperature controller comprises control circuit 5 and temperature display element 1; Control circuit 2 is located in the electric welding machine shell 3, and temperature display element 1 is located on the right flank of electric welding machine shell; Hygrosensor comprises that temperature sensitive member 71,72, temperature sensitive member over cap 73 and temperature signal become and send element 6; Temperature sensitive member 71,72 places in the electric heating device 8 obliquely; And its top ends is close in the bottom of printing opacity mouth 81,82 on the electric heating device 8 respectively; Temperature sensitive member 71 is consistent with the incline direction of printing opacity mouth 82 with printing opacity mouth 81 and temperature sensitive member 72, and temperature sensitive member 71,72 all becomes through temperature signal send element 6 to link to each other with control circuit 5, and temperature sensitive member over cap 73 covers on the temperature sensitive member 71,72; Wherein, temperature sensitive member the 71, the 72nd, infrared temperature sensing element.

See also Fig. 3; The temperature control principle figure that the utility model adopts has been shown among the figure; Control circuit 5 is between electric heating device 8 and power supply circuits 2; Temperature display element 1 links to each other with control circuit 2, and the temperature signal change send element 6 to link to each other with control circuit 5, and temperature sensitive member 71,72 becomes with temperature signal respectively send element 6 to link to each other.

The heating mould cavity side is reserved inclination printing opacity mouth 81,82 on the electric heating device 8 of the utility model welder, and heating mould former 41,42 and formpiston 91,92 use screw to be connected and fixed on the electric heating device 8, and be detachable in the time need not using.The size of the heating mould former of installing 41,42 can be the DN25 commonly used in the earth source heat pump work progress or the former of DN32 caliber, but is not limited to this two kinds of sizes.Because this device can adopt two sleeving temperature sensing elements 71,72, can use the mould of two kinds of sizes to heat during use simultaneously, also can only carry out a kind of heating of size mould.Temperature sensitive member 71,72 is installed in the electric heating device of heating mould former 41,42 bottoms, and it is tilted, make its temperature of sensing for connecting the temperature at pipeline solder bond place.The 73 main effects of temperature sensitive member over cap are protection temperature sensitive member 71,72, prevent in the work progress its infringement that causes.

Welding and temperature-controlled process that employing can be eliminated the hand-held spigot-and-socket pipe hot melting welder of obstruction are: open sweat soldering device heater switch; In the former with the insertion heating mould of buried effective polyethylene pipe or Polybutylene Pipe; Straight-through, the elbow or the threeway that will connect usefulness are again inserted in the formpiston of heating mould; Straight-through, elbow or threeway material must be consistent with buried tubing matter and wall thickness is thicker; The infrared temperature sensing element only needs the temperature of ground pipe laying weld inwall in the thin former of wall-thickness measurement, and shows through the temperature display element.Calculate the temperature of inwall when outer wall melts a part according to certain calculation method, if reach this temperature, control circuit breaks off the power supply of power supply circuits to electric heating device.

See also Fig. 4, choose the earth source heat pump pipe special system that certain brand is produced, its tubing is polyethylene; Fusion temperature is 120 ℃, selects the pipeline that is connected of nominal outside diameter DN25 the most frequently used in the engineering and DN32, and thermal conductivity factor is λ=0.4W/mK; The heating power of hot-melt welding machine is 600W; Then the heating power of former probably is 300W, DN32: wall thickness 2.5mm, DN25: wall thickness 3mm.

Can obtain following formula by thermal conduction study knowledge:

Add heat $Q=\frac{\mathrm{\&lambda;\; G\&Delta;\; t}}{r2g\mathrm{Ln}(\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000081435000000021.png,HDA0000081435000000031.png"\; state="\{\{state\}\}">r</figure-callout>}2/r1)}$

Bring relevant parameter into formula and obtain DN32: Δ t=17.09 ℃; DN25: Δ t=16.69 ℃; Consider the certainty of measurement of infrared measurement of temperature instrument, its control temperature of tubing that can set fusion temperature and be 120 ℃ is 103 ℃, breaks off the electric heating device power supply when promptly the pipe material inner wall temperature reaches 103 ℃ in inserting former immediately; Stop heating, carry out the operation of pipeline socket joint rapidly.

The utility model welder has the temperature display element, shows the measured temperature of infrared temperature sensing element in real time through it.Because the fusion temperature of different tubing can be different; Also in order to adapt to different construction environments; The workmen can come manually control electric heater according to actual conditions through the observation display temperature displayed, also can on welder, increase setting device, changes the heating of setting and stops temperature.

Above embodiment only supplies to explain the usefulness of the utility model; But not to the restriction of the utility model; The technical staff in relevant technologies field under the situation of spirit that does not break away from the utility model and scope, can also make various conversion or modification; Therefore all technical schemes that are equal to also should belong to the category of the utility model, should be limited each claim.

Claims (4)

1. the hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction; Comprise electric heating device, heating mould former, heating mould formpiston, power supply circuits and electric welding machine shell; Said power supply circuits are located in the said electric welding machine shell, and said electric heating device is located at the upper end of said electric welding machine shell, and the heating mould former is fixed on the leading flank of said electric heating device; The heating mould formpiston is fixed on the trailing flank of said electric heating device; And relative with the position of heating mould former, said electric heating device is electrically connected with said power supply circuits, it is characterized in that; Said hand-held spigot-and-socket pipe hot melting welder also comprises temperature controller and hygrosensor; Said temperature controller is located on the electric welding machine shell, and between being electrically connected of said electric heating device and said power supply circuits, and on the said electric heating device and the center that is positioned at said heating mould former bottom is provided with the printing opacity mouth of inclination; Said hygrosensor is located in the said printing opacity mouth, and links to each other with said temperature controller.

2. a kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction as claimed in claim 1; It is characterized in that; Said temperature controller comprises control circuit and temperature display element, and said control circuit is located in the electric welding machine shell, and between being electrically connected of said electric heating device and said power supply circuits; Said temperature display element is located on the lateral surface of electric welding machine shell, and links to each other with said control circuit.

3. according to claim 1 or claim 2 a kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction; It is characterized in that; Said hygrosensor comprises that temperature sensitive member, temperature sensitive member over cap and temperature signal become and send element; Said temperature sensitive member places in the electric heating device obliquely, and its top ends closes on the said electric heating device printing opacity mouth bottom, and the incline direction of said temperature sensitive member is consistent with pairing printing opacity mouth incline direction; Said temperature sensitive member becomes through said temperature signal send element to link to each other with said control circuit, and said temperature sensitive member over cap covers on the said temperature sensitive member.

4. a kind of hand-held spigot-and-socket pipe hot melting welder that can eliminate obstruction as claimed in claim 3 is characterized in that said temperature sensitive member is the infrared temperature sensing element.

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