Efficient water-cooled quenching oil heat exchange cooling system

Abstract

The utility model relates to an efficient water-cooled quenching oil heat exchange cooling system, which comprises a high-temperature pump and a pipeline, and is characterized by further comprising a detachable plate heat exchanger, the detachable plate heat exchanger comprises a fixed front end plate and a movable rear end plate, and plate sheets and gaskets are sequentially arranged between the fixed front end plate and the movable rear end plate at intervals. The fixed front end plate is detachably connected with the movable rear end plate through a clamping bolt and a nut, and the plate sheets and the gaskets which are sequentially arranged at intervals are fixed between the fixed front end plate and the movable rear end plate; the quenching oil is driven by the high-temperature pump to be cooled in the plate heat exchanger, so that the temperature of the quenching oil is stable, the quenching hardness of a workpiece is effectively guaranteed, the product quality is improved, in addition, cooling water is recycled through the cooling tower, water resources can be saved, the production cost is reduced, and the quenching oil is filtered and purified through the filter. The service life of the quenching oil is prolonged, the consumption of the quenching oil is reduced and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of heat treatment equipment, in particular to quenching heat treatment equipment. Background Art

[0002] With the continuous upgrading of the domestic industrial industry, the performance requirements for high-end parts are getting higher and higher, and the requirements for heat treatment processes are also rising. Quenching, as a conventional heat treatment process, is also being continuously optimized. The temperature stability of the quenching oil plays an important role in the uniformity of the surface hardness of the workpiece. However, as the quenching of the workpiece proceeds, the temperature of the quenching oil will gradually increase. Therefore, how to keep the temperature of the quenching oil stable is an urgent problem to be solved. Utility Model Content

[0003] The utility model aims to provide a high-efficiency water-cooled quenching oil heat exchange and temperature reduction system to solve the above technical problems.

[0004] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0005] The high-efficiency water-cooled quenching oil heat exchange and cooling system comprises a high-temperature pump, a pipeline, and a detachable plate heat exchanger. The detachable plate heat exchanger comprises a fixed front end plate and a movable rear end plate, plates and gaskets are sequentially arranged between the fixed front end plate and the movable rear end plate, the fixed front end plate is detachably connected to the movable rear end plate by clamping bolts and nuts, and the plates and gaskets sequentially arranged are fixed between the fixed front end plate and the movable rear end plate; the cold and hot fluids are separated in the flow channels on both sides of each plate through four corner holes of the plates and gaskets, and heat exchange is performed across the plates; the fixed front end plate is provided with a heat source inlet, a heat source outlet, a cold source inlet, and a cold source outlet at positions corresponding to the four corner holes of the plates; the high-temperature pump comprises an input port and an output port; the high-temperature pump input port is connected to the quenching oil inlet through a pipeline; the high-temperature pump output port is connected to the heat source inlet through a pipeline; the heat source outlet is connected to the quenching oil outlet through a pipeline; a heat sink is arranged outside the shell of the detachable plate heat exchanger, and a cooling fan with an air outlet facing the heat sink is also provided.

[0006] The utility model uses a high-temperature pump to transport the quenching oil into a detachable plate heat exchanger through a pipeline. The plate heat exchanger is provided with multiple groups of heat exchange plates. The cold and hot fluids are separated on both sides of the heat exchange plates for heat exchange through the concave-convex patterns on the surface of the plates and the through holes at the four corners, as well as gaskets. The contact area of ​​the heat exchange plates is large, so the plate heat exchanger has an extremely high heat exchange effect. Its heat transfer coefficient is 3-5 times higher than that of the tube heat exchanger, and the heat recovery rate can be as high as more than 90%. In addition, the structure is compact and light, and the floor space occupied is one-third of that of the tube heat exchanger, so the cooling effect is extremely efficient.

[0007] The detachable plate heat exchanger can also flexibly add or reduce heat exchange plates between the fixed front plate and the movable rear plate according to the flow and temperature of the quenching oil to meet the actual needs of quenching oil cooling.

[0008] A radiator can also be added to the detachable plate heat exchanger shell, and a cooling fan with an air outlet facing the radiator can be set for air cooling, so as to achieve a mixed cooling effect of air cooling and water cooling, further improve the cooling efficiency of the quenching oil, and improve the quality of workpiece quenching.

[0009] Furthermore, the area of ​​the detachable plate heat exchanger plates is 0.24 to 1.6 square meters, with 30 to 60 plates per square meter.

[0010] The detachable plate heat exchanger is a new type of high-efficiency heat exchanger composed of a series of metal plates with a certain corrugated shape. Thin rectangular channels are formed between the metal plates, and heat is exchanged through the metal plates. Metal plates of different areas can be used according to actual needs, and the number of metal plates can be flexibly increased or decreased. The overall structure is compact and flexible, and it is simple and convenient to clean and maintain. The heat exchange temperature can be accurately controlled, and the heat exchange area is relatively large, so it has a higher heat exchange rate.

[0011] Furthermore, an air heat exchanger using air to cool the quenching oil is also provided. The air heat exchanger includes a heat source inlet and a heat source outlet. The heat source inlet of the air heat exchanger is connected to the output port of the high-temperature pump, and the heat source outlet of the air heat exchanger is connected to the heat source inlet of the detachable plate heat exchanger.

[0012] In order to achieve a better cooling effect, a first-stage air-cooled heat exchanger can be added between the detachable plate heat exchanger and the high-temperature pump to further reduce the temperature of the quenching oil by air cooling.

[0013] Furthermore, it also includes a cooling tower using air cooling water, the cooling water output port of the cooling tower is connected to the cold source inlet of the detachable plate heat exchanger, and the cold source outlet of the detachable plate heat exchanger is connected to the recovery input port of the cooling tower.

[0014] The detachable plate heat exchanger uses cooling water as a cold source and quenching oil for heat exchange. The cooling water after heat exchange is cooled by air through a cooling tower to achieve water circulation, save water resources and reduce production costs.

[0015] Furthermore, a valve is provided in the pipeline between the high-temperature pump input port and the quenching oil inlet port; and a valve is provided in the pipeline between the heat source outlet and the quenching oil outlet.

[0016] Valves are used in output and input pipelines to control the on and off of the pipelines, making daily maintenance easier.

[0017] Furthermore, a two-stage filter is provided between the pipeline between the quenching oil inlet and the valve, the filtering accuracy of the front stage is 35-40 μm, and the filtering accuracy of the secondary stage is 5-10 μm.

[0018] The scale and carbon black generated during the daily quenching process will continue to deposit in the quenching oil. If not cleaned in time, it is easy to breed bacteria. Setting a filter at the quenching oil inlet can remove various impurities in the quenching oil, so that the quenching oil meets the standards for reuse, prolonging the service life of the quenching oil, reducing the consumption of quenching oil and saving costs.

[0019] The utility model is mainly composed of a high-temperature pump, a valve, a plate heat exchanger and a pipeline. The high-temperature pump is mainly used for the circulation of quenching oil, and the plate heat exchanger is mainly used for cooling the quenching oil. One path is for quenching oil, and the other path is for cooling water. The quenching oil is driven by the high-temperature pump to efficiently cool down the temperature in the plate heat exchanger to achieve temperature stability of the quenching oil, thereby effectively ensuring the hardness of the workpiece quenching and improving product quality. In addition, the cooling tower is used to recycle cooling water, which can save water resources and reduce production costs. The filter is used to filter and purify the quenching oil, thereby extending the service life of the quenching oil, reducing the consumption of the quenching oil and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Explanation of symbols:

[0023] 1. Removable plate heat exchanger; 2. High temperature pump; 3. Quenching oil inlet; 4. Quenching oil outlet; 5. Valve; 6. Cold source inlet; 7. Cold source outlet. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Reference Figure 1 As shown, the high-efficiency water-cooled quenching oil heat exchange and cooling system includes a high-temperature pump 2, a pipeline, and a detachable plate heat exchanger 1. The detachable plate heat exchanger 1 includes a fixed front end plate and a movable rear end plate, and plates and gaskets are sequentially arranged between the fixed front end plate and the movable rear end plate. The fixed front end plate is detachably connected to the movable rear end plate through clamping bolts and nuts, and the plates and gaskets sequentially arranged are fixed between the fixed front end plate and the movable rear end plate; the cold and hot fluids are transferred into the detachable plate heat exchanger 1 through the four corner holes of the plates and gaskets. The oil flows separately in the flow channels on both sides of each plate, and heat exchange is performed across the plates; a heat source inlet, a heat source outlet, a cold source inlet 6, and a cold source outlet 7 are arranged at the positions of the fixed front end plate corresponding to the four corner holes of the plate; the high-temperature pump 2 includes an input port and an output port; the input port of the high-temperature pump 2 is connected to the quenching oil inlet 3 through a pipeline; the output port of the high-temperature pump 2 is connected to the heat source inlet through a pipeline; the heat source outlet is connected to the quenching oil outlet 4 through a pipeline; a heat sink is arranged outside the outer shell of the detachable plate heat exchanger 1, and a cooling fan with an air outlet facing the heat sink is also arranged.

[0029] In this embodiment, a high-temperature pump 2 is used to transport the quenching oil into the detachable plate heat exchanger 1 through a pipeline. The plate heat exchanger is provided with multiple groups of heat exchange plates. The cold and hot fluids are separated on both sides of the heat exchange plates for heat exchange through the concave-convex patterns on the surface of the plates and the through holes at the four corners, as well as gaskets. The contact area of ​​the heat exchange plates is large, so the plate heat exchanger has a very high heat exchange effect. Its heat transfer coefficient is 3 to 5 times higher than that of the tube heat exchanger, and the heat recovery rate can be as high as more than 90%. In addition, the structure is compact and light, and the floor space occupied is one-third of that of the tube heat exchanger, so the cooling effect is extremely efficient.

[0030] In this embodiment, the detachable plate heat exchanger 1 can also flexibly add or reduce heat exchange plates between the fixed front end plate and the movable rear end plate according to the flow rate and temperature of the quenching oil to meet the actual quenching oil cooling needs.

[0031] In this embodiment, a radiator can be added to the outer shell of the detachable plate heat exchanger 1, and a cooling fan with an air outlet facing the radiator can be set for air cooling, so as to achieve a mixed cooling effect of air cooling and water cooling, further improve the cooling efficiency of the quenching oil, and improve the quality of workpiece quenching.

[0032] The present invention can also select other types of heat exchangers, such as shell-and-tube heat exchangers, shell-and-tube heat exchangers, immersed coil heat exchangers, etc., but from the perspective of heat exchange efficiency, plate heat exchangers are preferred, especially detachable plate heat exchangers 1. This type of heat exchanger can adapt to the flow and temperature changes of the heat source in production by adding or reducing plates in actual production use.

[0033] The plate area of ​​the detachable plate heat exchanger 1 is 0.24 to 1.6 square meters, with 30 to 60 plates per square meter.

[0034] In this embodiment, the detachable plate heat exchanger 1 is a new type of high-efficiency heat exchanger formed by stacking a series of metal plates with a certain corrugated shape. Thin rectangular channels are formed between the metal plates, and heat exchange is carried out through the metal plates. Metal plates of different areas can be used according to actual needs, and the number of metal plates can be flexibly increased or decreased. The overall structure is compact and flexible, and cleaning and maintenance are simple and convenient. The heat exchange temperature can be accurately controlled, and the heat exchange area is relatively large, so it has a higher heat exchange rate.

[0035] An air heat exchanger that uses air to cool the quenching oil is also provided. The air heat exchanger includes a heat source inlet and a heat source outlet. The heat source inlet of the air heat exchanger is connected to the output port of the high-temperature pump 2, and the heat source outlet of the air heat exchanger is connected to the heat source inlet of the detachable plate heat exchanger 1.

[0036] In this embodiment, in order to achieve a better cooling effect, a first-stage air-cooled heat exchanger can be added between the detachable plate heat exchanger 1 and the high-temperature pump 2 to further reduce the temperature of the quenching oil by air cooling.

[0037] It also includes a cooling tower using air cooling water, the cooling water output port of the cooling tower is connected to the cold source inlet 6 of the detachable plate heat exchanger 1, and the cold source outlet 7 of the detachable plate heat exchanger 1 is connected to the recovery input port of the cooling tower.

[0038] In this embodiment, the detachable plate heat exchanger 1 uses cooling water as a cold source and quenching oil for heat exchange. The cooling water after heat exchange is cooled by air through a cooling tower to achieve water circulation, save water resources, and reduce production costs.

[0039] A valve 5 is also provided in the pipeline between the input port of the high temperature pump 2 and the quenching oil inlet 3 ; a valve 5 is also provided in the pipeline between the heat source outlet and the quenching oil outlet 4 .

[0040] In this embodiment, valves 5 are used in the output pipeline and the input pipeline to control the on-off of the pipeline, and to facilitate daily maintenance after the pipeline is disconnected.

[0041] A two-stage filter is also arranged in the pipeline between the quenching oil inlet 3 and the valve 5, the filtering accuracy of the front stage is 35-40 μm, and the filtering accuracy of the secondary stage is 5-10 μm.

[0042] In this embodiment, scale and carbon black generated during the daily quenching process will continue to deposit in the quenching oil. If not cleaned in time, bacteria will easily grow. A filter is set at the quenching oil inlet 3 to remove various impurities in the quenching oil, so that the quenching oil meets the standard for reuse, extending the service life of the quenching oil, reducing the consumption of the quenching oil, and saving costs.

[0043] In this embodiment, the front filter element adopts 35-40 μm PP cotton, and the secondary filter element adopts 5-10 μm PP cotton.

[0044] 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.

[0045] 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.

[0046] 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 has been 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. High-efficiency water-cooled quenching oil heat exchange and cooling system, including high-temperature pumps and pipelines, characterized by: It also includes a detachable plate heat exchanger, which includes a fixed front end plate and a movable rear end plate, plates and gaskets are sequentially arranged between the fixed front end plate and the movable rear end plate, the fixed front end plate is detachably connected to the movable rear end plate by clamping bolts and nuts, and the plates and gaskets sequentially arranged at intervals are fixed between the fixed front end plate and the movable rear end plate; The four corner holes of the plates and gaskets in the removable plate heat exchanger separate the hot and cold fluids and flow them in the flow channels on both sides of each plate, so as to exchange heat across the plates. The positions of the four corner holes of the fixed front end plate corresponding to the plate are provided with a heat source inlet, a heat source outlet, a cold source inlet, and a cold source outlet; The high temperature pump includes an input port and an output port; The high temperature pump input port is connected to the quenching oil inlet through a pipeline; The high temperature pump outlet is connected to the heat source inlet through a pipeline; The heat source outlet is connected to the quenching oil outlet through a pipeline; The outer shell of the detachable plate heat exchanger is provided with a heat sink and a cooling fan with an air outlet facing the heat sink.

2. The high-efficiency water-cooled quenching oil heat exchange and cooling system according to claim 1 is characterized in that: The plate area of ​​the detachable plate heat exchanger is 0.24 to 1.6 square meters, with 30 to 60 plates per square meter.

3. The high-efficiency water-cooled quenching oil heat exchange and cooling system according to claim 1 is characterized in that: An air heat exchanger using air to cool quenching oil is also provided. The air heat exchanger includes a heat source inlet and a heat source outlet. The heat source inlet of the air heat exchanger is connected to the output port of the high-temperature pump, and the heat source outlet of the air heat exchanger is connected to the heat source inlet of the detachable plate heat exchanger.

4. The high-efficiency water-cooled quenching oil heat exchange and cooling system according to claim 1 is characterized in that: It also includes a cooling tower using air cooling water, the cooling water output port of the cooling tower is connected to the cold source inlet of the detachable plate heat exchanger, and the cold source outlet of the detachable plate heat exchanger is connected to the recovery input port of the cooling tower.

5. The high-efficiency water-cooled quenching oil heat exchange and cooling system according to claim 1 is characterized in that: A valve is also arranged in the pipeline between the high-temperature pump input port and the quenching oil inlet port; and a valve is also arranged in the pipeline between the heat source outlet port and the quenching oil outlet port.

6. The high-efficiency water-cooled quenching oil heat exchange and cooling system according to claim 5 is characterized in that: A two-stage filter is also arranged between the pipeline between the quenching oil inlet and the valve, the filtering accuracy of the front stage is 35-40 μm, and the filtering accuracy of the secondary stage is 5-10 μm.

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