CN201697396U - A double U-shaped buried heat exchanger - Google Patents

Abstract

A double U-shaped buried heat exchanger is assembled from two standard single U-shaped buried heat exchangers through an isolation bracket and a guide body. The single U-shaped buried heat exchanger is welded by a single U-shaped elbow and a pipe. The positioning ring of the upper beam of the isolation bracket is used to locate the single U-shaped heat exchanger. The shape of the isolation bracket is a rectangular parallelepiped groove composed of two semicircles at both ends for positioning the guide body; the isolation bracket is connected by the thread of the bolt The threaded holes at both ends of the lower beam are used to connect the single U-shaped heat exchanger and the guide body. The material of the standard single U-shaped elbow and the guide body is thermoplastic material. The isolation bracket is made of metal material or polymer material with sufficient strength. The injection molding and processing technology of the single U-shaped elbow is stable, and the product quality is stable. The welding process of the elbow and the pipe occurs before assembly. U-shaped fittings are protected from scratches by grit. The utility model overcomes the shortcomings of the existing double U-shaped buried heat exchangers that are difficult to install and construct.

Description

A double U-shaped buried heat exchanger

technical field

The utility model relates to a double U-shaped buried heat exchanger.

Background technique

The U-shaped buried heat exchanger is an important part of the ground source heat pump system.

Originating from Europe, the ground source heat pump system is an energy-efficient heating or cooling system that can reduce greenhouse gas (such as C0 ₂ ) emissions to 0%.

In Europe, ground source heat pump systems are mainly used in private apartments and houses with low heat loads. Therefore, single U-shaped buried heat exchangers with low heat load are generally used in Europe. The construction cost of the ground source heat pump system is very high. In order to make the construction cost more economical, it is very important to reduce the size of the well.

In China, the situation is different for ground source heat pump systems, which are mainly used in large buildings such as hotels, large supermarkets and exhibition centers with high heat loads. Therefore, in China, heating or cooling designers usually design double U-shaped buried heat exchangers. Compared with the single U-shaped buried heat exchanger, the double U-shaped buried heat exchanger can improve the heat exchange efficiency by nearly 70%.

There are two types of double U-shaped buried heat exchangers.

One is produced using plastic material, injection molding two separate parts, then welding the two parts together, and finally machining the surface. Therefore, the processing cost is high, and the product quality is unstable. The common quality problem is that the plastic material shrinks inconsistently and forms voids.

In order to control the cost of drilling, the drilling size of the ground source heat pump system is very small, which is similar for the single U-shaped buried heat exchanger and the double U-shaped buried heat exchanger, so for the current double U-shaped buried heat exchanger As far as the device is concerned, due to space constraints, the installation of U-shaped joints and pipes is also very difficult. In many cases, special welding tools have to be used.

The other is a combination of plastic single U pipe fittings and metal brackets. Due to the limitation of the size of the drilling, the sinking resistance of the double-U buried heat exchanger is relatively large during the construction process. In addition, the soil in some areas contains more sand and gravel, which is easy to scratch the outer surface of the U-shaped joint.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the existing double U-shaped buried heat exchanger, which are complex in processing, unstable in quality, difficult in installation and construction, and easy to be damaged during construction, and provide a simple processing, stable quality and convenient installation. And the double U-shaped buried heat exchanger that can effectively protect the buried heat exchanger from damage during the construction process.

To achieve the above object, the utility model takes the following technical solutions:

A double U-shaped buried heat exchanger, the double U-shaped buried heat exchanger is assembled from an isolation bracket, a guide body and two single U-shaped buried heat exchangers; the isolation bracket is composed of the upper The crossbeam, the central column and the lower crossbeam form an I-shaped main body, and two side wings located on both sides of the lower crossbeam and perpendicular to the lower crossbeam and on the same plane. The two ends of the upper crossbeam are respectively provided with positioning rings. The two ends of the lower beam are respectively provided with threaded holes, and the two side wings are respectively provided with grooves; the guide body is a hollow cone, the lower bottom of which is a small-diameter torus, and the upper bottom It is a large-caliber torus, the plane where the upper bottom is located is parallel to the plane where the lower bottom is located, and the inside of the cone is provided with cross reinforcement ribs, and the two cross surfaces of the cross reinforcement ribs are respectively on the plane where the upper bottom is located and On the plane where the lower bottom is located, bosses matching the grooves on the two side wings of the above-mentioned spacer bracket are respectively provided on both sides of a surface of the cross surface of the upper bottom, and on the cross surface of the upper bottom The two ends of the other surface are respectively provided with lifting lugs for piercing bolts; the top of the U-shaped elbow of the single U-shaped buried heat exchanger is provided with a protrusion that matches the positioning ring of the isolation bracket The bottom of the U-shaped elbow of the single U-shaped buried heat exchanger is provided with through holes for passing through bolts; the raised parts on the top of the U-shaped elbow of each single U-shaped buried heat exchanger are respectively It is socketed with the positioning ring of the corresponding isolation bracket, the boss of the guide body is socketed with the groove on the side of the isolation bracket, and bolts are provided on both sides of the isolation bracket, and each bolt passes through the guide body The lifting lug, the through hole at the bottom of the U-shaped elbow of the single U-shaped buried heat exchanger is connected with the threaded hole of the lower beam of the isolation bracket. In this way, a double U-shaped buried heat exchanger is obtained.

In the utility model, the positioning ring of the upper beam of the isolation bracket is a horizontal positioning ring for positioning the single U-shaped heat exchanger; the lower beam of the isolation bracket is a cylinder parallel to the upper beam, and the threaded hole at the end can pass through The single U-shaped heat exchanger is connected by bolts; each side wing perpendicular to the lower beam cylinder has a groove in the shape of a long bar with a semicircular cross-section at both ends, which is used to position the diversion body, and the groove on the side wing The thickness of the groove should be less than the height of the boss on the guide body, which is shaped as a semicircular strip at both ends, so as to ensure that the guide body is always kept perpendicular to the middle isolation bracket during the construction process, which is better play a role in diversion.

The single U-shaped buried heat exchanger is welded by a single U-shaped elbow and a pipe.

The two sides of the center column of the isolation bracket are provided with reinforcing ribs.

The isolation bracket is made of metal material or polymer material with sufficient strength.

The top of the center column of the isolation bracket is provided with threaded holes.

The upper beam of the isolation bracket is a flat cuboid, one of the two large planes of the flat cuboid faces upwards, and the other plane faces downward; the lower beam of the isolation bracket is cylindrical.

The two sides of the lower beam of the cylindrical body of the isolation bracket are provided with side wings perpendicular thereto and on the same plane with grooves. The shape of the groove is an elongated body with semicircular cross-sections at both ends.

The guide body is a thick-walled cone with a taper of 60 degrees, with cross ribs inside, and the upper bottom surface of the cone is flush with the lower bottom surface of the cone.

One of the bottom surfaces of the cross ribs in the cone of the diversion body is provided with grooves on the side wings of the bottom of the isolation bracket (the shape is a long strip with a semicircular cross-section at both ends) (the shape is also The cross section of both ends is a semicircular elongated body) boss. Moreover, the thickness of the grooves of the two flanks is smaller than the thickness of the boss of the guide body.

Two lifting lugs perpendicular to the bottom surface of the cone are provided on the other upper surface of the cross ribs in the cone of the guide body.

The material of the single U-shaped heat exchanger is thermoplastic material.

The material of the guide body is thermoplastic material.

The utility model adopts a two-step method in the process of processing and assembling:

The first step is to weld the buried pipe with the standard single U-shaped elbow to form a single U-shaped buried heat exchanger. The second step is to use the isolation bracket to assemble the two welded single U-shaped buried heat exchangers. The connection between the single U-shaped buried heat exchanger and the guide body and the isolation bracket is connected by standard bolts to form a double U Type buried heat exchanger.

The utility model has the advantages of:

The utility model adopts a standard single U-shaped elbow, has mature injection molding technology, simple processing, stable quality, and no cavity caused by material shrinkage. The guide body is a thick-walled cone with cross ribs, which is easy to inject and saves materials. The cone guide body can effectively protect the U-shaped pipe fittings from being scratched by sand and gravel during construction, and effectively reduce the resistance to sinking. Before assembly, pipes and U-shaped elbows are welded, there is no space limitation, and no special welding equipment is required. The assembly of the isolation bracket and the standard U-shaped elbow does not require any special tools, and can be assembled in the workshop or at the construction site, and the assembly is very convenient. The utility model overcomes the shortcomings of the existing double U-shaped buried heat exchangers that are difficult to install and construct.

The double U-shaped buried heat exchanger of the utility model can meet the requirement of minimizing the drilling size, and uses less materials and is more environmentally friendly.

Below by accompanying drawing and embodiment the utility model is further described.

Description of drawings

Figure 1 is a schematic diagram of the structure of the isolation bracket.

Fig. 2 is a schematic diagram of the structure of the guide body.

Fig. 3 is a schematic structural diagram of a single U-shaped elbow.

Fig. 4 is a structural front view of a double U-shaped buried heat exchanger.

Fig. 5 is a structural perspective view of a double U-shaped buried heat exchanger.

Detailed ways

Describe below with embodiment in conjunction with accompanying drawing. Wherein, the U-shaped buried heat exchanger in Fig. 4-Fig. 5 only shows a U-shaped elbow, but the pipes welded to the U-shaped elbow are not shown.

Example 1

As shown in Figure 1, the main body of the intermediate spacer bracket 1 is I-shaped, and the upper beam of the I-shaped main body is a flat cuboid. One of the large-area planes faces upwards and the other faces downwards, and the two ends of the upper beam are respectively provided with positioning rings 2; the lower beam of the I-shaped main body is cylindrical, and the two ends of the lower beam cylinder are respectively provided with threads Hole 3 is provided with reinforcing rib 4 between the upper beam and the lower beam of the I-shaped main body to increase the strength of the intermediate isolation bracket 1, and the two sides of the lower beam cylinder are respectively provided with side wings 5, and the side wings 5 are perpendicular to the lower beam and at the same time On a plane, the side wings 5 are provided with grooves 6 in the shape of elongated strips with semicircular cross-sections at both ends, and a threaded hole 7 is provided in the middle of the upper beam. As shown in Figure 2, the top of the U-shaped elbow 8 of the single U-shaped buried heat exchanger is provided with a raised part 9 that matches the positioning ring of the intermediate isolation bracket, and a through hole is provided at the bottom of the U-shaped elbow 10. The bolt 15 in Fig. 5 passes through the through hole, and the through hole has been blocked. As shown in Figure 3, the upper bottom surface of one of the cross ribs 12 inside the diversion body 11 is provided with two bosses 13 shaped as semicircular elongated cross-sections at both ends for positioning The middle isolation bracket 1 is provided with two lifting lugs 14 perpendicular to the upper bottom surface on the other reinforcing rib of the cross reinforcing rib 12 . As shown in Fig. 4 and Fig. 5, bolts 15 are provided on both sides of the intermediate isolation bracket 1, and each bolt 15 passes through the lifting lug 14 of the guide body, and the U-shaped elbow of the single U-shaped buried heat exchanger The through hole at the bottom of 8 is connected with the threaded hole of the lower crossbeam of the intermediate isolation bracket 1, and the protrusion 9 on the top of the U-shaped elbow 8 of each single U-shaped buried heat exchanger is respectively connected with the corresponding The positioning ring 2 of the intermediate isolation bracket 1 is socketed, and the shape on the bottom surface of the guide body 11 is a semicircular elongated boss 13 with a semicircular cross-section at both ends and the groove on the side of the lower beam of the intermediate isolation bracket 1. . In this way, a double U-shaped buried heat exchanger is obtained. The intermediate isolation bracket can be made of metal material or polymer material with sufficient strength; the material of buried pipe, single U-shaped elbow and guide body is thermoplastic material. In the specific operation, the buried pipe is first welded with the single U-shaped elbow to form a single U-shaped buried heat exchanger, and then the two welded single U-shaped buried heat exchangers and the guide body are connected with an intermediate isolation bracket. Assemble them to make a double U-shaped buried heat exchanger.

Claims (10)

1. A double U-shaped buried heat exchanger is characterized in that: the double U-shaped buried heat exchanger is assembled from an isolation bracket, a guide body and two single U-shaped buried heat exchangers; The isolation bracket is composed of an I-shaped main body composed of an upper beam, a central column and a lower beam, and two side wings located on both sides of the lower beam and perpendicular to the lower beam and on the same plane. The two ends of the upper beam Positioning rings are respectively provided, threaded holes are respectively provided at both ends of the lower beam, and grooves are respectively provided on the two side wings; the guide body is a hollow cone, and its lower bottom is a circular Torus, the upper bottom of which is a large-diameter torus, the plane where the upper bottom is located is parallel to the plane where the lower bottom is located, and the inside of the cone is provided with cross ribs, and the two cross faces of the cross ribs are respectively On the plane where the upper bottom is located and the plane where the lower bottom is located, bosses that match the grooves on the two side wings of the above-mentioned spacer bracket are respectively provided on both sides of one surface of the cross surface of the upper bottom, The two ends of the other surface of the cross surface of the upper bottom are respectively provided with lifting lugs for piercing bolts; the top of the U-shaped elbow of the single U-shaped buried heat exchanger is provided with a positioning ring, the bottom of the U-shaped elbow of the single U-shaped buried heat exchanger is provided with through holes for passing through bolts; the U-shaped elbow of each single U-shaped buried heat exchanger The protrusions on the top are respectively socketed with the positioning rings of the corresponding isolation brackets, the bosses of the guide body are socketed with the grooves on the side wings of the isolation brackets, and bolts are respectively provided on both sides of the isolation brackets, each The bolts respectively pass through the lifting lug of the guide body, the through hole at the bottom of the U-shaped elbow of the single U-shaped buried heat exchanger, and are connected with the threaded holes of the lower beam of the isolation bracket. 2. The double U-shaped buried heat exchanger according to claim 1, characterized in that: the top of the center column of the isolation bracket is provided with a threaded hole. 3. The double U-shaped buried heat exchanger according to claim 1 or 2, characterized in that: the single U-shaped buried heat exchanger is welded by a single U-shaped elbow and a pipe. 4. The double U-shaped buried heat exchanger according to claim 1 or 2, characterized in that: reinforcing ribs are provided on both sides of the center column of the isolation bracket. 5. The double U-shaped buried heat exchanger according to claim 1 or 2, characterized in that: the grooves of the two flanks of the isolation bracket are in the shape of long strips with semicircular cross-sections at both ends body; the boss of the guide body matched with the groove of the flanks is also a long strip with semicircular cross-sections at both ends, and the thickness of the grooves of the two flanks is smaller than that of the guide The thickness of the fluid's boss. 6. The double U-shaped buried heat exchanger according to claim 1 or 2, characterized in that: the upper beam of the isolation bracket is a flat cuboid, and one of the two large-area planes of the flat cuboid The plane faces upwards, and the other plane faces downwards; the lower beam of the isolation bracket is cylindrical. 7. The double U-shaped buried heat exchanger according to claim 1 or 2, characterized in that: the isolation bracket is made of metal material or polymer material. 8. The double U-shaped buried heat exchanger according to claim 1 or 2, characterized in that: the taper of the guide body is 60 degrees. 9. The double U-shaped buried heat exchanger according to claim 1 or 2, characterized in that: the material of the single U-shaped heat exchanger is thermoplastic material. 10. The guide body according to claim 1 or 2, characterized in that: the material of the guide body is a thermoplastic material.

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