Cooling device outside vertical heat treatment furnace

Abstract

The utility model relates to the technical field of heat exchange equipment. An external cooling device of a vertical heat treatment furnace comprises a fan, a heat exchanger and a heat exchanger lower sealing head which are sequentially arranged to form a gas circulation channel. The fan is provided with a gas outlet, and the gas outlet is used for being communicated with a protective gas input port of the heat treatment furnace body; the heat exchanger lower sealing head is provided with an air inlet which is used for being communicated with an exhaust port of a heat treatment furnace body; the heat exchanger is connected with the heat exchanger lower sealing head; a cold source fluid inlet connector and a cold source fluid outlet connector are arranged on the side face of a shell of the heat exchanger. In conclusion, the closed gas loop is formed between the outer cooling device and the heat treatment furnace, and the heat exchanger is arranged on the loop, so that the high-temperature gas in the heat treatment furnace is circularly cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a gas circulation cooling device. Background Art

[0002] Pit-type tempering furnaces and other heat treatment furnaces are widely used in the field of industrial production and are the main production equipment in industries such as smelting, forging, manufacturing, heat treatment, and drying. Usually, in the cooling and unloading stage of the pit-type tempering furnace, in order to ensure production efficiency and production quality, protective gas needs to be introduced for cooling.

[0003] Therefore, when the cooling efficiency needs to be accelerated in production, canned protective gas outside the furnace is often filled into the furnace to replace the high-temperature gas in the furnace to achieve the purpose of cooling. However, the introduction of canned protective gas will cause a sudden drop in local temperature and an uneven cooling environment. In severe cases, it will cause the workpiece to be scrapped, affecting the production quality and production cost of metal materials.

[0004] In addition, the practice of filling with protective gas will also cause waste of protective gas and increase production costs. Utility Model Content

[0005] The utility model aims to provide a cooling device outside a vertical heat treatment furnace to solve the above technical problems.

[0006] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0007] A vertical heat treatment furnace external cooling device comprises a fan, a heat exchanger and a lower cover of the heat exchanger, which are arranged in sequence to form a gas circulation channel; the fan is provided with an air outlet, which is an air outlet for connecting to a protective gas input port of a heat treatment furnace body; the lower cover of the heat exchanger is provided with an air inlet, which is an air inlet for connecting to an exhaust port of the heat treatment furnace body; an inlet joint and an outlet joint of a cold source fluid are provided on the side of the shell of the heat exchanger; the outer shell of the heat exchanger adopts a vertical pipe body with an opening on the top; a transfer chamber is also provided between the fan and the heat exchanger; the transfer chamber adopts a closing structure, and one end of the two open ends of the transfer chamber is a small-diameter end and the other end is a large-diameter end; the large-diameter end is connected to the upper opening of the outer shell of the heat exchanger; and the small-diameter end is connected to the fan.

[0008] The external cooling device of the vertical heat treatment furnace is used to provide a rapid cooling function for the heat treatment furnace and the nitriding furnace that require gas circulation cooling. The high-temperature air in the heat treatment furnace or the nitriding furnace is connected to the air inlet of the lower head of the heat exchanger through a pipeline, and the high-temperature gas is connected to the heat exchanger through the lower head of the heat exchanger. In the heat exchanger, the high-temperature air and the cold source fluid exchange heat and cool down. The cooled air enters the fan through the transfer cavity, and is then output by the centrifugal impeller through the air outlet to return the cooled gas to the heat treatment furnace or the nitriding furnace, completing a circulation cooling process between the heat treatment furnace and the nitriding furnace and the external cooling device of the vertical heat treatment furnace. During the circulation cooling process, the high-temperature gas in the furnace will not cool down too quickly at once, and other gases outside the furnace body will not be introduced to cause adverse effects on the workpieces in the furnace.

[0009] The heat exchanger adopts a tube structure, which has the effect of smooth ventilation. The adapter cavity has a large diameter connected to the heat exchanger end, and a small diameter connected to the fan air inlet side. A closed structure is formed from the heat exchanger to the fan, which can avoid gas impact and reduce the working noise of the fan intake.

[0010] The heat exchanger is a shell and tube heat exchanger; the shell and tube heat exchanger comprises a shell, heat exchange tubes are arranged inside the shell, the heat exchange tubes are fixedly connected to tube sheets, and the tube sheets are fixedly arranged at both ends of the shell.

[0011] A shell and tube heat exchanger is a type of heat exchanger that has multiple heat exchange tubes arranged in a circular pattern along the axis in the radial direction. The high-temperature gas is diverted to multiple heat exchange tubes, which can increase the contact area between the heat source and the cold source and improve the efficiency of heat exchange.

[0012] Furthermore, an asbestos filter for filtering gas is arranged in the transfer cavity.

[0013] An asbestos filter is arranged in the conversion chamber to filter out tiny particles in the high-temperature gas and purify the protective gas returned to the furnace.

[0014] Furthermore, the fan, the adapter chamber, the heat exchanger, and the lower head of the heat exchanger are sealed and connected; the lower head of the heat exchanger is provided with anchor bolt holes; the heat exchange tube is a T2 copper tube; the cold source fluid is cooling water or cooling oil.

[0015] The various devices of the external cooler are sealed to prevent the protective gas filled in the heat treatment furnace from leaking out of the furnace during the cycle cooling process and to prevent it from mixing into the gas outside the furnace.

[0016] The anchor bolt holes provided on the lower head of the heat exchanger are used to fix the lower head of the heat exchanger on the ground of the workstation to prevent it from tipping over. At the same time, the lower head of the heat exchanger also serves as a base for installing an external cooling device.

[0017] Copper tubes have excellent thermal conductivity, with a thermal conductivity coefficient of up to 398w / mk, and good flexibility and plasticity. Heat exchange tubes made of T2 copper can easily process complex piping structures.

[0018] Cooling water and cooling oil both have good heat conduction capabilities. As a cold source fluid, cooling water has the advantage of low cost, but it is easy to form scale in the heat exchange tube; cooling oil has the best heat conduction capability, will not scale, and will not corrode the heat exchange tube, but the cost of use is high.

[0019] Further, preferably, a pipeline structure of heat exchange pipes is provided inside the shell of the heat exchanger, an inlet joint and an outlet joint of the cold source fluid are provided on the side of the shell, and the pipeline structure connects the inlet joint and the outlet joint respectively.

[0020] Another heat exchange tube structure different from the shell-and-tube heat exchanger is provided, in which high-temperature gas passes through the shell side, cold source fluid passes through the tube side, and high and low temperature heat exchange is performed in the shell side and the tube side.

[0021] Furthermore, preferably, the pipeline structure is a spiral structure, and heat dissipation fins are provided on the outer diameter of the heat exchange tube.

[0022] The heat exchange tubes are arranged in a spiral shape in the radial direction of the heat exchanger. The cold source fluid passes through the heat exchange tubes, and the high-temperature gas passes through the outside of the heat exchange tubes. The spiral structure is easy to process and can reduce manufacturing costs. Heat dissipation fins are arranged on the outer diameter of the heat exchange tubes to increase the contact area between the heat source and the cold source and improve the efficiency of heat exchange.

[0023] Furthermore, the pipeline structure is a multi-layer composite structure formed by a plurality of heat exchange tubes arranged in a cross section and arranged along the axis of the heat exchange tube.

[0024] The multi-layer composite structure is a three-dimensional complex pipeline structure constructed in the radial and transverse dimensions of the exchanger, so as to increase the surface area of ​​the heat exchange tube and improve the efficiency of heat exchange. In the multi-layer composite structure, the cold source fluid passes through the heat exchange tube, and the high-temperature gas passes through the outside of the heat exchange tube.

[0025] Further, preferably, the multi-layer composite structure has the following structure: the heat exchange tubes of the odd-numbered layers are arranged in an inner spiral shape on the radial cross section, and the heat exchange tubes at the center of the circle go vertically downward to the even-numbered layers; the heat exchange tubes of the even-numbered layers are arranged in an outer spiral shape on the radial cross section, and the heat exchange tubes at the outer circle go vertically downward to the odd-numbered layers; a spacing of 1 to 1.5 cm is retained between the rings, and the odd and even layers are overlapped.

[0026] The heat exchange tube is vortex-shaped, which can allocate more surface area on the cross section of the heat exchange tube without affecting the passage of high-temperature gas. The heat exchange tube is distributed layer by layer in the radial direction, further effectively utilizing the limited heat exchanger space to increase the heat exchange area and improve the heat exchange efficiency.

[0027] Furthermore, preferably, the multi-layer composite structure has the following structure: the heat exchange tubes are arranged in a reciprocating linear manner in a radial cross section, two heat exchange tubes are spaced 1 to 1.5 cm apart, and overlap in multiple radial cross sections.

[0028] The reciprocating linear arrangement can effectively utilize the limited heat exchanger space to increase the heat exchange area and improve the efficiency of heat exchange.

[0029] Furthermore, a heat pump evaporator chamber is connected above the heat exchanger, and a transfer chamber is connected above the heat pump evaporator chamber.

[0030] Heat pump heat exchangers cool the gas by absorbing heat when the refrigerant evaporates. Heat pump heat exchangers are used in the subsequent cooling process of shell and tube heat exchangers to prevent high-temperature gas from damaging the refrigerant in the evaporator. Using heat pump heat exchangers, faster cooling requirements can be achieved.

[0031] The beneficial effects of the utility model are: a vertical heat treatment furnace external cooling device, high temperature gas enters the external cooling device from the heat treatment furnace body through the air inlet of the lower head of the heat exchanger, the high temperature gas is cooled by the shell and tube heat exchanger, and then returns to the heat treatment furnace body from the air outlet of the fan, completing a cycle cooling, during which the protective gas in the heat treatment furnace will not leak, and the gas outside the furnace will not mix into the furnace. The utility model provides an external cooling device for a heat treatment furnace without an integrated cooling device, which can meet the process requirements of cycle cooling and improve the efficiency of heat treatment processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0033] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0034] Figure 2 This is a schematic diagram of the tube-in-tube structure of the shell and tube heat exchanger of the utility model;

[0035] Figure 3 It is a schematic diagram of the vortex shape of the multi-layer composite structure of the utility model;

[0036] Figure 4 It is a schematic diagram of the reciprocating form of the multi-layer composite structure of the utility model.

[0037] Explanation of symbols:

[0038] 1. Fan; 2. Transfer chamber; 3. Heat exchanger; 4. Lower head of heat exchanger; 5. Air outlet; 6. Heat exchange tube; 7. Air inlet; 8. Inlet joint; 9. Outlet joint. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present invention more understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0042] Secondly, the "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that can be included in at least one implementation of the utility model. The "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0043] Reference Figure 1 As shown, a vertical heat treatment furnace external cooling device includes a fan 1, a heat exchanger 3, and a lower head 4 of the heat exchanger, which are arranged in sequence to form a gas circulation channel; the fan 1 is provided with an air outlet 5, which is an air outlet for connecting to the protective gas inlet of the heat treatment furnace body; the lower head 4 of the heat exchanger is provided with an air inlet 7, which is an air inlet for connecting to the exhaust port of the heat treatment furnace body; the side of the shell of the heat exchanger 3 is provided with an inlet joint 8 and an outlet joint 9 of the cold source fluid; the outer shell of the heat exchanger 3 adopts a vertical pipe body with an opening on the top; a transfer chamber 2 is also provided between the fan 1 and the heat exchanger 3; the transfer chamber 2 adopts a closing structure, and the two open ends of the transfer chamber 2, one end is a small-diameter end, and the other end is a large-diameter end; the large-diameter end is connected to the upper opening of the outer shell of the heat exchanger 3; the small-diameter end is connected to the fan 1.

[0044] In this embodiment, the external cooling device of the vertical heat treatment furnace adopts a slender structure as a whole, and the fan 1 adopts a centrifugal fan. The centrifugal fan includes a motor and a volute. The volute is placed horizontally, and a centrifugal impeller is arranged in the volute. The motor is located above the volute, and the motor shaft is perpendicular to the volute. This structure can reduce the footprint of the cooling device and also reduce the noise when the motor is working.

[0045] The external cooling device of the vertical heat treatment furnace is used to provide a rapid cooling function for the heat treatment furnace and the nitriding furnace that require gas circulation cooling. The high-temperature air in the heat treatment furnace or the nitriding furnace is connected to the air inlet 7 of the lower head 4 of the heat exchanger through a pipeline, and the high-temperature gas is connected to the heat exchanger through the lower head 4 of the heat exchanger. In the heat exchanger, the high-temperature air and the cold source fluid exchange heat and cool down. The cooled air enters the fan 1 through the adapter cavity 2, and is then output by the centrifugal impeller through the air outlet 5 to return the cooled gas to the heat treatment furnace or the nitriding furnace, completing a circulation cooling process between the heat treatment furnace and the nitriding furnace and the external cooling device of the vertical heat treatment furnace. During the circulation cooling process, the high-temperature gas in the furnace will not be cooled too quickly at once, and other gases outside the furnace body will not be introduced to cause adverse effects on the workpieces in the furnace.

[0046] The heat exchanger 3 adopts a tube shape, which has the effect of smooth ventilation. The adapter cavity 2 is used to connect components of different sizes at both ends. The diameter of the heat exchanger 3 end is large, and the diameter of the air inlet side of the fan 1 is small. A closed structure is formed from the heat exchanger 3 to the fan 1, which can avoid gas impact and reduce the working noise of the fan intake.

[0047] Example 1

[0048] Reference Figure 2 As shown, the heat exchanger 3 is a shell and tube heat exchanger 3; the shell and tube heat exchanger 3 includes a shell, and heat exchange tubes 6 are installed inside the shell. The heat exchange tubes 6 are fixedly connected to the tube sheets, and the tube sheets are fixedly arranged at both ends of the shell.

[0049] The heat exchange tubes are arranged around the axis of the shell and tube heat exchanger in a ring shape, a triangle shape, or a square shape. Gaps are left between the heat exchange tubes to allow high-temperature gas to pass through. By setting up multiple heat exchange tubes to divert the high-temperature gas, the contact area between the high-temperature gas and the cold source fluid can be increased after diversion, so as to achieve sufficient heat exchange and improve cooling efficiency.

[0050] A baffle is also installed in the shell of the shell and tube heat exchanger. The baffle can increase the speed of the high-temperature gas and force the high-temperature gas to pass through the heat exchange tube 6 horizontally for multiple times along a specified distance, further increasing the contact area between the high-temperature gas and the cold source fluid to achieve sufficient heat exchange and improve the cooling efficiency.

[0051] An asbestos filter for filtering gas is arranged in the transfer chamber 2 .

[0052] An asbestos filter is arranged in the conversion chamber to filter out tiny particles in the high-temperature gas and purify the protective gas returned to the furnace.

[0053] The fan 1, the transfer chamber 2, the heat exchanger 3, and the lower head 4 of the heat exchanger are sealed and connected; the lower head 3 of the heat exchanger is provided with anchor bolt holes; the heat exchange tube 6 is a T2 copper tube; the cold source fluid is cooling water or cooling oil.

[0054] The various devices of the external cooler are sealed to prevent the protective gas filled in the heat treatment furnace from leaking out of the furnace during the cycle cooling process and to prevent it from mixing into the gas outside the furnace.

[0055] In this embodiment, the air outlet 5 of the fan 1 and the air inlet 7 of the lower head 4 of the heat exchanger adopt national standard flanges, which are easy to connect to the heat treatment furnace on the one hand, and achieve a sealed connection with the heat treatment furnace on the other hand.

[0056] The anchor bolt holes provided on the lower head 4 of the heat exchanger are used to fix the lower head 4 of the heat exchanger on the workstation floor to prevent it from tipping over. Meanwhile, the lower head 4 of the heat exchanger can also serve as a mounting base for fixing and supporting the external cooling device.

[0057] The copper tube has excellent thermal conductivity, with a thermal conductivity coefficient of up to 398w / mk, and has good flexibility and plasticity. The heat exchange tube 6 made of T2 copper is easy to process complex pipeline structures.

[0058] Both cooling water and cooling oil have good heat transfer capability. As a cold source fluid, cooling water has the advantage of low cost, but it is easy to form scale in the heat exchange tube 6; cooling oil has the best heat transfer capability, will not scale, and will not corrode the heat exchange tube 6, but it has high cost.

[0059] In order to prevent the problem of scaling when the cold source uses cooling water, in this embodiment, a phase change material can also be coated on the inside of the copper tube. The phase change material includes a solid component, a heat conductive component, a phase change material and a solidification system. The phase change material includes a phase change material that changes from a solid phase to a liquid phase at a temperature in the range of 25°C to 60°C.

[0060] A pipeline structure of a heat exchange tube 6 is arranged inside the shell of the heat exchanger 3, and an inlet joint 8 and an outlet joint 9 of a cold source fluid are arranged on the side of the shell, and the pipeline structure is connected to the inlet joint 8 and the outlet joint 9 respectively.

[0061] In this embodiment, another heat exchange tube structure different from the shell-and-tube heat exchanger is provided, in which high-temperature gas passes through the shell side and cold source fluid passes through the tube side, and high and low temperature heat exchange is performed in the shell side and the tube side.

[0062] Example 2

[0063] The pipeline structure is a spiral structure, and the outer diameter of the heat exchange tube 6 is provided with heat dissipation fins.

[0064] In this embodiment, the heat exchange tube 6 is arranged in a spiral manner in the radial direction of the heat exchanger. The tube side is a cold source fluid channel, and the shell side is a high-temperature gas channel. The spiral structure pipelines are respectively arranged on the upper and lower end sides of the heat exchanger, and countercurrent heat exchange or cocurrent heat exchange can be implemented.

[0065] The outer diameter of the heat exchange tube 6 may also be provided with metal fins for heat dissipation to further increase the contact area between the heat source and the cold source to improve the heat exchange efficiency.

[0066] The spiral structure is easy to process, saves materials, and can reduce manufacturing costs.

[0067] The pipeline structure is a multi-layer composite structure formed by a plurality of heat exchange tubes 6 arranged in a cross section and arranged along the axis of the heat exchange tube 3 .

[0068] In this embodiment, the multi-layer composite structure is to construct a three-dimensional complex pipeline structure in the radial and transverse dimensions of the heat exchanger 3, so as to increase the surface area of ​​the heat exchange tube 6 and improve the efficiency of heat exchange. In the multi-layer composite structure, the cold source fluid passes through the heat exchange tube 6, and the high-temperature gas passes through the outside of the heat exchange tube 6.

[0069] Example 3

[0070] Reference Figure 3 As shown, the multi-layer composite structure has the following structure: the heat exchange tubes 6 of the odd-numbered layers are arranged in an inner spiral shape on the radial cross section, and the heat exchange tubes at the center of the circle go vertically downward to the even-numbered layers; the heat exchange tubes of the even-numbered layers are arranged in an outer spiral shape on the radial cross section, and the heat exchange tubes at the outer circle go vertically downward to the odd-numbered layers; a spacing of 1 to 1.5 cm is retained between the rings, and the odd and even layers are overlapped.

[0071] In this embodiment, the heat exchange tubes 6 are arranged in a spiral shape. Without affecting the passage of high-temperature gas, more pipelines can be set on the cross-section of the axis of the heat exchange tube 3. Multiple layers of spiral pipelines are distributed in layers in the radial direction of the axis of the heat exchange tube 3, further effectively utilizing the limited space of the heat exchanger 3 to increase the heat exchange area and improve the efficiency of heat exchange.

[0072] Example 4

[0073] Reference Figure 4 As shown, the multi-layer composite structure has the following structure: the heat exchange tubes 6 are arranged in a reciprocating linear manner in the radial cross section of the heat exchange tube 3, and the two heat exchange tubes are spaced 1 to 1.5 cm apart and overlap in multiple radial cross sections.

[0074] In this embodiment, the heat exchange tubes 6 are arranged in a reciprocating straight line. Without affecting the passage of high-temperature gas, more pipelines can be set on the cross-section of the axis of the heat exchange tube 3. The reciprocating pipelines are distributed in layers in the radial direction of the axis of the heat exchange tube 3, which can effectively utilize the limited heat exchanger space to increase the heat exchange area and improve the efficiency of heat exchange.

[0075] Furthermore, a heat pump evaporator chamber is connected above the heat exchanger 3 , and the transfer chamber 2 is connected above the heat pump evaporator chamber.

[0076] In this embodiment, the heat pump evaporator chamber cools the gas by absorbing heat through the evaporation of the refrigerant medium. The heat pump evaporator chamber includes a shell, an evaporator is arranged inside the shell, and a compressor and a condenser, as well as an expansion valve and other auxiliary equipment are also included outside the shell.

[0077] The heat pump evaporator chamber needs to be set in the subsequent cooling process of the heat exchanger 3 to prevent the high temperature gas from damaging the refrigerant medium in the evaporator. Using the heat pump evaporator chamber, faster cooling requirements can be achieved.

[0078] Furthermore, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described, i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention.

[0079] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0080] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cooling device outside a vertical heat treatment furnace, characterized in that: It includes a fan, a heat exchanger, and a lower head of the heat exchanger, which are arranged in sequence to form a channel for gas circulation; The fan is provided with an air outlet, and the air outlet is an air outlet for connecting to the protective gas inlet of the heat treatment furnace body; The lower end cover of the heat exchanger is provided with an air inlet, which is used to communicate with the exhaust port of the heat treatment furnace body; The side of the shell of the heat exchanger is provided with an inlet joint and an outlet joint of the cold source fluid; The shell of the heat exchanger is a vertical tube with an opening on the top; A transfer chamber is also provided between the fan and the heat exchanger; The transfer cavity adopts a closed-end structure, and one end of the two open ends of the transfer cavity is a small-diameter end, and the other end is a large-diameter end; The large-diameter end is connected to the upper opening of the shell of the heat exchanger; The small-diameter end is connected to the fan.

2. The cooling device outside a vertical heat treatment furnace according to claim 1, characterized in that: The heat exchanger is a shell and tube heat exchanger; The shell and tube heat exchanger comprises a shell, heat exchange tubes are arranged inside the shell, the heat exchange tubes are fixedly connected to tube sheets, and the tube sheets are fixedly arranged at both ends of the shell.

3. The cooling device outside a vertical heat treatment furnace according to claim 1, characterized in that: An asbestos filter for filtering gas is arranged in the transfer cavity.

4. The cooling device outside a vertical heat treatment furnace according to claim 1, characterized in that: The fan, the transfer chamber, the heat exchanger, and the lower head of the heat exchanger are sealed and connected; The lower head of the heat exchanger is provided with anchor bolt holes; The heat exchange tube adopts T2 copper tube; The cold source fluid is cooling water or cooling oil.

5. The cooling device outside a vertical heat treatment furnace according to claim 1, characterized in that: A pipeline structure of heat exchange pipes is arranged inside the shell of the heat exchanger, an inlet joint and an outlet joint of the cold source fluid are arranged on the side of the shell, and the pipeline structure is connected to the inlet joint and the outlet joint respectively.

6. The cooling device outside a vertical heat treatment furnace according to claim 5, characterized in that: The pipeline structure is a spiral structure, and the outer diameter of the heat exchange tube is provided with heat dissipation fins.

7. The cooling device outside a vertical heat treatment furnace according to claim 5, characterized in that: The pipeline structure is a multi-layer composite structure formed by a plurality of heat exchange tubes arranged in cross section along the axis of the heat exchange tube.

8. The cooling device outside a vertical heat treatment furnace according to claim 7, characterized in that: The multi-layer composite structure has the following structure: the heat exchange tubes of odd-numbered layers are arranged in an inner spiral shape on a radial cross section, and the heat exchange tubes at the center of the circle go vertically downward to the even-numbered layers; the heat exchange tubes of even-numbered layers are arranged in an outer spiral shape on a radial cross section, and the heat exchange tubes at the outer circle go vertically downward to the odd-numbered layers; a spacing of 1 to 1.5 cm is maintained between rings, and the odd and even layers are overlapped.

9. The cooling device outside a vertical heat treatment furnace according to claim 7, characterized in that: The multi-layer composite structure has the following structure: the heat exchange tubes are arranged in a reciprocating linear manner in the radial cross section, two heat exchange tubes are spaced 1 to 1.5 cm apart, and overlap in multiple radial cross sections.

10. The external cooling device of a vertical heat treatment furnace according to claim 1, characterized in that: The heat exchanger is connected to a heat pump evaporator chamber above, and the heat pump evaporator chamber is connected to a transfer chamber above.

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