Quenching tank

Abstract

The utility model discloses a quenching tank and relates to the technical field of quenching. Comprising a quenching tank body, a heat recovery box, a first heat exchange tube arranged in the quenching tank body and a second heat exchange tube arranged in the heat recovery box, and a closed loop is formed between the second heat exchange tube and the first heat exchange tube. Water is contained in the heat recovery box, and a heat conduction agent (such as heat conduction oil) is added into the first heat exchange pipe and the second heat exchange pipe to form a heat conduction agent circulation loop, so that after the heat conduction agent in the first heat exchange pipe exchanges heat with a quenching solution in the quenching tank, the heat conduction agent flows into the second heat exchange pipe to exchange heat with the water in the heat recovery box; the water is heated by utilizing the waste heat in the quenching tank body, so that the waste heat is recycled; and meanwhile, water in the heat recovery box can cool the heat conduction agent in the circulation loop, so that when the heat conduction agent circularly flows, the quenching solution is cooled, and the situation that the quenching efficiency is affected due to the fact that the temperature of the quenching solution is too high is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of quenching, in particular to a quenching tank. Background Art

[0002] The quenching tank is a container filled with quenching medium. When the workpiece is immersed in the tank for cooling, it is necessary to ensure that the workpiece completes the quenching operation evenly at a reasonable cooling rate so that the workpiece meets the technical requirements.

[0003] During the quenching process, the high-temperature workpiece will heat the quenching solution, causing the temperature of the quenching solution to rise. If this part of heat is not utilized, it will lead to a huge waste of energy. Utility Model Content

[0004] The utility model aims to provide a quenching tank which can utilize the high temperature of the quenching solution to recover and utilize the quenching waste heat to the maximum extent.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A quenching tank comprises a quenching tank body, a heat recovery box, a first heat exchange tube arranged in the quenching tank body, and a second heat exchange tube arranged in the heat recovery box, wherein a closed loop is formed between the second heat exchange tube and the first heat exchange tube.

[0007] Preferably, the first heat exchange tube comprises a spiral heat exchange tube arranged on the inner wall of the quenching tank body.

[0008] Preferably, the first heat exchange tube further includes an S-shaped heat exchange tube arranged at the bottom of the quenching tank body.

[0009] Preferably, the quenching tank further includes a scraper sleeve sleeved on the outer wall of the S-shaped heat exchange tube, and a driving device for driving the scraper sleeve to move in a horizontal direction.

[0010] Preferably, the driving device includes an L-shaped rod arranged at both ends of the scraper sleeve, a slider arranged at the top end of the L-shaped rod, and a slide rail arranged on the side wall of the quenching tank body and slidably matched with the slider.

[0011] Preferably, the second heat exchange tube is spiral or S-shaped.

[0012] Preferably, the side wall of the quenching tank body is also connected to a first liquid pipe, a filtering device is provided at the liquid outlet of the first liquid pipe, the filtering device is connected to a second liquid pipe, the liquid outlet of the second liquid pipe passes through the heat recovery box and is connected to a third heat exchange tube arranged in the heat recovery box, and the liquid outlet of the third heat exchange tube passes through the side wall of the quenching tank body and is connected to the interior of the quenching tank body.

[0013] Preferably, the filtering device comprises a filter box and a filter screen arranged in the filter box, the liquid outlet end of the first liquid pipe is arranged above the filter screen, and the liquid inlet end of the second liquid pipe is arranged below the filter screen.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model is provided with a heat recovery box, a first heat exchange tube is provided in the quenching tank body, a second heat exchange tube is provided inside the heat recovery box, and a closed loop is formed between the second heat exchange tube and the first heat exchange tube. Specifically, water is contained in the heat recovery box, and a heat conductor (such as heat transfer oil) is added to the first heat exchange tube and the second heat exchange tube to form a heat conductor circulation loop, which can be used to heat the heat conductor in the first heat exchange tube and the quenching solution in the quenching tank, and then flow into the second heat exchange tube to heat the water in the heat recovery box, so as to utilize the residual heat in the quenching tank body to heat the water, so as to realize the recycling of the residual heat; at the same time, the water in the heat recovery box can cool down the heat conductor in the circulation loop, so as to cool down the quenching solution when the heat conductor circulates, so as to avoid the quenching solution temperature being too high and affecting the quenching efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model in the top view direction;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model in a top view;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the middle scraper sleeve when viewed from the left;

[0019] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of the middle filter box in the front view direction;

[0020] In the figure: 100-quenching tank body, 110-heat recovery box, 120-first heat exchange tube, 130-second heat exchange tube, 121-spiral heat exchange tube, 122-S-shaped heat exchange tube, 140-L-shaped rod, 150-slider, 160-slide rail, 170-first liquid pipe, 180-second liquid pipe, 190-third heat exchange tube, 200-filter box, 210-filter screen, 220-scraper sleeve. DETAILED DESCRIPTION

[0021] Below in conjunction with the attached Figures 1 to 4 , the technical solutions in the embodiments of the utility model are clearly and completely described, but the protection scope of the utility model is not limited to the following.

[0022] Example 1

[0023] A quenching tank, such as Figure 1 and Figure 2 As shown, it includes a quenching tank body 100 (rectangular tank body), a heat recovery box 110 arranged outside the quenching tank body 100, a first heat exchange tube 120 arranged in the quenching tank body 100, and a second heat exchange tube 130 arranged in the heat recovery box 110, and a closed loop is formed between the second heat exchange tube 130 and the first heat exchange tube 120. Specifically, the heat recovery box 110 is filled with water, and a heat conductor (such as heat transfer oil, prior art) is added to the closed loop formed by the first heat exchange tube 120 and the second heat exchange tube 130. In addition, a first oil pump (prior art, not shown in the figure) is arranged on the first heat exchange tube 120 to circulate the heat conductor in the first heat exchange tube 120 and the second heat exchange tube 130. Further, as Figure 1 and Figure 2 As shown, the first heat exchange tube 120 includes a spiral heat exchange tube 121 disposed on the inner wall of the quenching tank body 100. Further, the first heat exchange tube 120 also includes an S-shaped heat exchange tube 122 disposed at the bottom of the quenching tank body 100. One end of the S-shaped heat exchange tube 122 is connected to one end of the spiral heat exchange tube 121, and the other end and the other end of the spiral heat exchange tube 121 both penetrate the side wall of the quenching tank body 100 and are respectively connected to the two ends of the second heat exchange tube 130. Further, as Figure 1 As shown, the second heat exchange tube 130 is spiral or S-shaped.

[0024] Working principle: Normal quenching operation is carried out in the quenching tank body 100. During the quenching process, the water temperature in the quenching tank body 100 rises, and heat exchange occurs between the water and the heat transfer agent in the first heat exchange tube 120. Afterwards, the first oil pump is turned on to allow the heat transfer agent in the first heat exchange tube 120 and the second heat exchange tube 130 to flow. After the heat transfer agent in the first heat exchange tube 120 flows into the heat recovery tank 110, heat exchange is carried out with the water in the heat recovery tank 110 to heat the water in the heat recovery tank 110. , realizing the recycling of the preheat in the quench tank body 100, and after heat exchange with the water in the heat recovery box 110, it flows into the first heat exchange tube 120 along the second heat exchange tube 130. During the circulation of the heat conductor, the waste heat in the quench tank body 100 can be effectively utilized. At the same time, the water in the heat recovery box 110 can cool the heat conductor in the circulation loop, so as to cool the quenching solution when the heat conductor circulates, avoiding the quenching solution temperature being too high and affecting the quenching efficiency.

[0025] Example 2

[0026] During the quenching operation, a layer of impurities will accumulate on the wall of the S-shaped heat exchange tube 122 at the lower part of the quenching tank body 100, such as impurities on the surface of the workpiece and impurities formed by the quenching oil (the quenching oil often contains a lot of oxide scale, carbon black and other impurities. During the long-term quenching operation, some carbon black and oxide scale will harden into blocks). If these impurities are not handled in time, the heat exchange efficiency of the S-shaped heat exchange tube 122 will be reduced. Based on Example 1, as Figure 1-2 As shown, the quenching tank further includes a scraper sleeve 220 sleeved on the outer wall of the S-shaped heat exchange tube 122, and a driving device for driving the scraper sleeve 220 to move in the horizontal direction. Figure 3 As shown, the driving device includes an L-shaped rod 140 arranged at both ends of the scraper sleeve 220, a slider 150 arranged at the top of the L-shaped rod 140, and a slide rail 160 arranged on the side wall of the quenching tank body 100 and slidably matched with the slider 150.

[0027] Working principle: When the surface of the S-shaped heat exchange tube 122 is covered with impurities, such as Figure 1 As shown, the slider 150 moves left and right on the slide rail 160, and then the scraper sleeve 220 moves back and forth on the straight tube of the S-shaped heat exchange tube 122 to scrape off impurities attached to the tube wall of the S-shaped heat exchange tube 122. By setting the L-shaped rod 140, it can be staggered with the spiral heat exchange tube 121 to avoid collision between the two.

[0028] Example 3

[0029] When scraping off the impurities on the S-shaped heat exchange tube 122 in Embodiment 2, it is also necessary to process the impurities in the quenching solution at the same time, otherwise the impurities just scraped off will be deposited again on the wall of the S-shaped heat exchange tube 122. Specifically, based on Embodiment 2, as Figure 1 , 2 and Figure 4 As shown, the side wall of the quenching tank body 100 is also connected to a first liquid pipe 170, and a filter device is provided at the liquid outlet of the first liquid pipe 170. The filter device is connected to a second liquid pipe 180, and the liquid outlet of the second liquid pipe 180 passes through the heat recovery box 110 and is connected to a third heat exchange pipe 190 disposed in the heat recovery box 110. The liquid outlet of the third heat exchange pipe 190 passes through the side wall of the quenching tank body 100 and is connected to the inside of the quenching tank body 100. Further, the filter device includes a filter box 200, and a filter screen 210 disposed in the filter box 200, the liquid outlet of the first liquid pipe 170 is disposed above the filter screen 210, and the liquid inlet of the second liquid pipe 180 is disposed below the filter screen 210. In actual implementation, a second oil pump (existing technology, not shown in the figure) is provided on the first liquid pipe 170 or the second liquid pipe 180.

[0030] Working principle: When removing impurities in the quenching solution, start the second oil pump first. Under the action of the second oil pump, the quenching solution enters the filter box 200 along the first liquid pipe 170, is filtered through the filter screen 210, and then enters the third heat exchange tube 190 along the second liquid pipe 180. Since the temperature of the quenching solution is relatively high, it can exchange heat with the water in the heat recovery tank 110 at this time, and then utilize the residual heat in the quenching solution again. After heat exchange with the water in the heat recovery tank 110, it enters the quenching tank body 100 along the third heat exchange tube 190.

[0031] In this embodiment, impurities in the quenching solution can be effectively removed, and at the same time, the waste heat in the quenching tank body 100 can be reused, effectively improving the waste heat utilization rate.

[0032] In the description of this patent, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "longitudinal", "horizontal" and the like indicate the orientation or position relationship based on the attached Figure 4 The orientation or positional relationship shown is only for the convenience of describing this patent and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of this patent.

[0033] The above are only preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the present invention through the above teachings or the technology or knowledge in the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A quenching tank, characterized in that: The invention comprises a quenching tank body (100), a heat recovery box (110), a first heat exchange tube (120) arranged in the quenching tank body (100), and a second heat exchange tube (130) arranged in the heat recovery box (110), wherein a closed loop is formed between the second heat exchange tube (130) and the first heat exchange tube (120); The first heat exchange tube (120) comprises a spiral heat exchange tube (121) arranged on the inner wall of the quenching tank body (100); The first heat exchange tube (120) further comprises an S-shaped heat exchange tube (122) arranged at the bottom of the quenching tank body (100), a scraper sleeve (220) sleeved on the outer wall of the S-shaped heat exchange tube (122), and a driving device for driving the scraper sleeve (220) to move in a horizontal direction; The second heat exchange tube (130) is spiral or S-shaped.

2. A quenching tank according to claim 1, characterized in that: The driving device comprises an L-shaped rod (140) arranged at both ends of the scraper sleeve (220), a sliding block (150) arranged at the top end of the L-shaped rod (140), and a sliding rail (160) arranged on the side wall of the quenching tank body (100) and slidably matched with the sliding block (150).

3. A quenching tank according to claim 1, characterized in that: The side wall of the quenching tank body (100) is also connected to a first liquid pipe (170); a filter device is provided at a liquid outlet of the first liquid pipe (170); the filter device is connected to a second liquid pipe (180); the liquid outlet of the second liquid pipe (180) passes through the heat recovery box (110) and is connected to a third heat exchange pipe (190) provided in the heat recovery box (110); the liquid outlet of the third heat exchange pipe (190) passes through the side wall of the quenching tank body (100) and is connected to the interior of the quenching tank body (100).

4. A quenching tank according to claim 3, characterized in that: The filtering device comprises a filtering box (200), and a filtering net (210) arranged in the filtering box (200), the liquid outlet end of the first liquid pipe (170) being arranged above the filtering net (210), and the liquid inlet end of the second liquid pipe (180) being arranged below the filtering net (210).

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