Abstract: A method for reinforcing soft ground by post-grouting combined with pressurized vacuum preloading is proposed, by pre-burying prefabricated vertical drains and air-boosted pipes in granular material piles, and the air-boosted pipes are used as grouting pipes to reduce the number of times of piling, which not only improves the construction efficiency, but also reduces the structural disturbance of the soil and the influence of smear effect, thus reducing the impact on the radial permeability and the radial consolidation coefficients. The method does not use geotextile bags for granular materials, which can avoid the problem of forming a localized clogging area around the geotextile bags, and the method not only improves the efficiency of vacuum transfer in a pre-consolidation stage, but also improves the grouting effect in the later stage, effectively enhances the strength of soft soil and makes granular material piles and the surrounding soil form composite ground.

Abstract: A method for reinforcing soft ground by post-grouting combined with pressurized vacuum preloading is proposed, by pre-burying prefabricated vertical drains and air-boosted pipes in granular material piles, and the air-boosted pipes are used as grouting pipes to reduce the number of times of piling, which not only improves the construction efficiency, but also reduces the structural disturbance of the soil and the influence of smear effect, thus reducing the impact on the radial permeability and the radial consolidation coefficients. The method does not use geotextile bags for granular materials, which can avoid the problem of forming a localized clogging area around the geotextile bags, and the method not only improves the efficiency of vacuum transfer in a pre-consolidation stage, but also improves the grouting effect in the later stage, effectively enhances the strength of soft soil and makes granular material piles and the surrounding soil form composite ground.

Abstract: A heat exchange device includes a housing having an opening on one side, and a heat exchange core body. The heat exchange device also includes a connection block provided with a first channel, a second channel, a first interface, and a second interface. The connection block is also provided with a first socket of the first channel, and a first socket of the second channel. The heat exchange core body includes at least one flat tube. At least one part of one end of the flat tube extends into the first socket of the first channel and is mounted in a sealed manner with the first socket of the first channel, and at least one part of the other end of the flat tube extends into the first socket of the second channel and is mounted in a sealed manner with the first socket of the second channel.

Abstract: A heat exchange device includes a housing having an opening on one side, and a heat exchange core body. The heat exchange device also includes a connection block provided with a first channel, a second channel, a first interface, and a second interface. The connection block is also provided with a first socket of the first channel, and a first socket of the second channel. The heat exchange core body includes at least one flat tube. At least one part of one end of the flat tube extends into the first socket of the first channel and is mounted in a sealed manner with the first socket of the first channel (31), and at least one part of the other end of the flat tube extends into the first socket of the second channel and is mounted in a sealed manner with the first socket of the second channel.

Abstract: A heat exchanger includes a case body and a heat exchange core, a first fluid channel is formed in the case body, a second fluid channel is formed in the heat exchange core, the heat exchange core includes a flat pipe, the second fluid channel is located in the flat pipe, the flat pipe includes a plurality of bending parts and a plurality of flat and straight parts; a first hole in communication with a first connection pipe and a second hole in communication with a second connection pipe are provided in the case body, the first hole partially corresponds to the bending parts on one side of the flat pipe or the flat and straight parts close to the bending parts, and the second hole partially corresponds to the bending parts on the other side or the flat and straight parts close to the bending parts.

Abstract: A heat exchange device includes a heat exchanger and a mounting plate for fixing the heat exchange device, and includes first and second flow passages which are not in communication with each other. The mounting plate includes a communication hole, a protruding portion and a mounting hole. The protruding portion protrudes outwards from the front side of the mounting plate. The mounting hole extends through the protruding portion and the mounting plate and includes a valve core receiving cavity. The valve core receiving cavity is in communication with the communication hole via a connection groove at a back side of the mounting plate; the mounting plate is fixed to the heat exchanger in a sealed manner, the mounting hole is in communication with the first flow passage, and the communication hole is in communication with the first flow passage via the connection groove and the mounting hole.

Abstract: A heat exchanger includes a case body and a heat exchange core, a first fluid channel is formed in the case body, a second fluid channel is formed in the heat exchange core, the heat exchange core includes a flat pipe, the second fluid channel is located in the flat pipe, the flat pipe includes a plurality of bending parts and a plurality of flat and straight parts; a first hole in communication with a first connection pipe and a second hole in communication with a second connection pipe are provided in the case body, the first hole partially corresponds to the bending parts on one side of the flat pipe or the flat and straight parts close to the bending parts, and the second hole partially corresponds to the bending parts on the other side or the flat and straight parts close to the bending parts.

Abstract: A heat exchange device includes a heat exchanger and a mounting plate for fixing the heat exchange device, and includes first and second flow passages which are not in communication with each other. The mounting plate includes a communication hole, a protruding portion and a mounting hole. The protruding portion protrudes outwards from the front side of the mounting plate. The mounting hole extends through the protruding portion and the mounting plate and includes a valve core receiving cavity. The valve core receiving cavity is in communication with the communication hole via a connection groove at a back side of the mounting plate; the mounting plate is fixed to the heat exchanger in a sealed manner, the mounting hole is in communication with the first flow passage, and the communication hole is in communication with the first flow passage via the connection groove and the mounting hole.