Device for preventing waste gas in steel wire quenching oil tank from overflowing

Abstract

The invention relates to the technical field of quenching, in particular to a device for preventing waste gas in a steel wire quenching oil tank from overflowing. Comprising a top plate horizontally arranged over a tank body, a gap exists between the top plate and the tank body in the vertical direction, the periphery of the tank body is movably sleeved with a lifting sleeve in the vertical direction, a containing frame used for bearing steel wires is arranged on the lower portion of the top plate, the height of the containing frame is smaller than that of the gap, and during quenching, the lifting sleeve ascends and shields the gap; the groove body, the top plate and the lifting sleeve jointly form a sealing cavity, the containing frame is located in the sealing cavity, the lifting sleeve makes up the gap before quenching or after quenching, and the containing frame supports the steel wire to penetrate through the gap in the horizontal direction. According to the invention, the condition that waste gas overflows during quenching is completely avoided.

Description

Technical Field

[0001] The invention relates to the technical field of quenching, and in particular to a device for preventing waste gas in a steel wire quenching oil tank from overflowing. Background Art

[0002] During the quenching process, the quenching oil that comes into contact with the high-temperature workpiece quickly vaporizes and burns, forming a large amount of oil smoke. The existing quenching oil tank cannot be well sealed, resulting in the spillage of harmful substances in the oil smoke, which not only harms the health of the workers, but also the high temperature of the quenching oil smoke is not conducive to direct treatment by the subsequent exhaust gas treatment device.

[0003] Chinese patent announcement number CN214655099U discloses a device to prevent the exhaust gas in the quenching oil tank from overflowing. A cover plate is installed on the upper part of the quenching oil tank box, a guide rail is installed on the side of the quenching oil tank box, a sealing cover is placed on the guide rail, the "inverted L"-shaped horizontal part of the sealing cover is located on the cover plate, and the vertical part is located on the left side of the quenching oil tank box. A matching opening is opened on the quenching oil tank box corresponding to the sealing cover, and the quenching workpiece basket is hung on the crane through a sling; an exhaust pipe and two oil supply pipes connected to the inside of the quenching oil tank box are provided on the cover plate, an exhaust fan is installed in the outlet of the L-shaped horizontal part of the exhaust pipe, an oil fume sensor is installed on the inner side of the cover plate, and a refrigerant circulation jacket is provided on the periphery of the quenching box.

[0004] Although the above scheme achieves the sealing of the quenching oil tank to a certain extent, since the quenching workpiece needs to be pulled by the sling, the sealing cover is set in time. When the sealing cover closes the opening, it cannot completely seal the area around the sling. The gap around the sling can only be reduced by squeezing the sling. However, the sling needs to be lifted and lowered when driving the quenching workpiece for quenching. Excessive squeezing of the sling will cause the sling to be unable to be lifted and lowered normally, and will also cause excessive wear of the sling, which may lead to breakage. Summary of the invention

[0005] In view of the above problems, a device is provided to prevent the waste gas in the steel wire quenching oil tank from overflowing. By setting a top plate above the tank body, a gap is formed between the top plate and the tank body in the vertical direction. At the same time, a placement frame is set below the top plate, so that the placement frame passes through the gap in the process of driving the steel wire to load and unload, avoiding the opening on the top plate. When quenching, the lifting sleeve blocks the gap, and the tank body, the top plate and the lifting sleeve completely form a sealed cavity. The waste gas generated by quenching in the tank body is completely gathered in the sealed cavity, and there will be no waste gas overflow. At the same time, a sealing ring is set at the bottom of the top plate, so that the inner ring height of the sealing ring is higher than the outer ring height of the sealing ring, avoiding a small amount of waste gas from overflowing from the connection seam between the lifting sleeve and the top plate.

[0006] In order to solve the problems of the prior art, the present invention provides a device for preventing the overflow of waste gas in a steel wire quenching oil tank, wherein the device is arranged on the tank body of the quenching oil tank; the device comprises a top plate horizontally arranged directly above the tank body, a gap exists between the top plate and the tank body in the vertical direction, a lifting sleeve is provided on the outer periphery of the tank body for movement along the vertical direction, a placement rack for supporting the steel wire is provided at the lower part of the top plate, the height of the placement rack is less than the height of the gap, during quenching, the lifting sleeve rises and covers the gap, the tank body, the top plate and the lifting sleeve together constitute a sealed cavity, the placement rack is located in the sealed cavity, before or after quenching, the lifting sleeve makes way for the gap, and the placement rack supports the steel wire to pass through the gap in the horizontal direction.

[0007] Preferably, a sealing ring is provided at the lower part of the top plate, the inner ring height of the sealing ring is higher than the outer ring height of the sealing ring, and when the lifting sleeve blocks the gap, the outer ring of the sealing ring contacts the inner wall of the lifting sleeve.

[0008] Preferably, two valve bodies are arranged on the upper part of the top plate, one of which is used to discharge external air into the sealed cavity after the sealed cavity is formed, and the other valve body is used to discharge waste gas in the sealed cavity.

[0009] Preferably, an annular sleeve is provided on the outside of the trough body, the trough body is a cylindrical structure, an annular groove is formed between the inner ring wall of the annular sleeve and the outer wall of the trough body, the lifting sleeve and the annular groove slide together in the vertical direction, and a switch valve is provided at the bottom of the annular groove to inject outside air into the annular groove after the sealing cavity is formed.

[0010] Preferably, a lifting groove is opened at the bottom of the top plate, a lifting ring is arranged in the lifting groove for vertical movement, an inner ring side of the sealing ring is fixedly arranged at the bottom of the lifting ring, and when the lifting ring rises, the sealing ring is squeezed by the outer ring side of the lifting groove.

[0011] Preferably, a traction machine is provided on the top plate, a traction rope is wound inside the traction machine, the traction rope passes through the top plate and extends to the lower part of the top plate, a telescopic unit is fixedly provided at the lower end of the traction rope, and the telescopic unit is used to drive the placement rack to move in the horizontal direction.

[0012] Preferably, the telescopic unit comprises a lifting frame fixedly connected to the lower end of the traction rope, a telescopic frame is slidably arranged in the lifting frame along the length direction of the lifting frame, and the placement frame is fixedly arranged at the bottom of the telescopic frame.

[0013] Preferably, a driving wheel is rotatably provided at the lower part of the top plate, and a locking unit for locking the telescopic frame and the lifting frame is provided on the telescopic frame. The placement frame has a highest position when moving in the vertical direction. When the placement frame is at the highest position, the upper part of the telescopic frame contacts with the driving wheel, and the locking unit is in an unlocked state. When the placement frame does not reach the highest position, the upper part of the telescopic frame is out of contact with the driving wheel, and the locking unit is in a locked state.

[0014] Preferably, the locking unit includes a plug-in hole vertically penetrating through the lifting frame, a plug-in rod is vertically arranged directly below the plug-in hole and is plugged into the plug-in hole, the plug-in rod is slidably arranged in the telescopic frame, a spring is vertically arranged between the bottom of the plug-in rod and the telescopic frame, and an unlocking rod is vertically fixed at the lower part of the top plate, and the vertical projection of the unlocking rod coincides with the vertical projection of the plug-in rod.

[0015] Preferably, a cover is fixedly provided on the outside of the traction machine.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention sets a top plate above the trough body so that a gap is formed between the top plate and the trough body in the vertical direction, and sets a placement frame below the top plate so that the placement frame passes through the gap in the process of driving the wire to load and unload, thereby avoiding openings on the top plate. During quenching, the lifting sleeve blocks the gap, and the trough body, the top plate and the lifting sleeve completely form a sealed cavity. The waste gas generated by quenching in the trough body is completely gathered in the sealed cavity, and there will be no waste gas overflow. At the same time, a sealing ring is set at the bottom of the top plate so that the inner ring height of the sealing ring is higher than the outer ring height of the sealing ring, thereby avoiding a small amount of waste gas from overflowing from the joint between the lifting sleeve and the top plate.

[0018] 2. By setting a lifting ring on the upper part of the sealing ring that can drive the sealing ring to rise and fall synchronously, the sealing ring is squeezed when the lifting ring rises, and the outer ring diameter of the sealing ring after squeezing is reduced, so that the lifting sleeve will not contact the outer ring of the sealing ring when it rises. This is because the inner ring height of the sealing ring is higher than the outer ring height of the sealing ring, and the lifting sleeve will pass through the sealing ring during the rising process. If the sealing ring does not shrink at this time, the outer ring of the sealing ring will directly contact the inner wall of the lifting sleeve. During the rising process of the lifting sleeve, the sealing ring is bent or even damaged by the friction force. In this way, after the sealing cavity is formed, the sealing performance of the sealing ring is reduced, and the service life of the sealing ring is also reduced. After the lifting ring is set, the above situation can be avoided.

[0019] 3. An annular sleeve is arranged on the periphery of the trough body to form an annular groove between the annular sleeve and the trough body. After the sealing cavity is formed, the annular groove is inflated so that the air pressure in the annular groove is greater than the air pressure in the sealing cavity, thereby preventing the exhaust gas in the sealing cavity from overflowing from the gap between the lifting sleeve and the trough body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The invention is a three-dimensional schematic diagram of a device for preventing waste gas in a steel wire quenching oil tank from overflowing when the tank body is in the quenching process.

[0021] Figure 2The invention is a three-dimensional schematic diagram of a device for preventing waste gas in a steel wire quenching oil tank from overflowing when the tank body is in a non-quenching state.

[0022] Figure 3 The invention is a device for preventing the waste gas in the steel wire quenching oil tank from overflowing. Figure 2 A local enlarged schematic diagram of point A in the middle.

[0023] Figure 4 The present invention is a cutaway perspective view of a device for preventing waste gas from overflowing from a steel wire quenching oil tank. Figure 1 .

[0024] Figure 5 The invention is a device for preventing the waste gas in the steel wire quenching oil tank from overflowing. Figure 4 A local enlarged schematic diagram of point B in the middle.

[0025] Figure 6 The invention is a device for preventing the waste gas in the steel wire quenching oil tank from overflowing. Figure 5 A partial enlarged schematic diagram of point C in the middle.

[0026] Figure 7 The present invention is a cutaway perspective view of a device for preventing waste gas from overflowing from a steel wire quenching oil tank. Figure 2 .

[0027] Figure 8 The invention is a device for preventing the waste gas in the steel wire quenching oil tank from overflowing. Figure 7 A partial enlarged schematic diagram of point D in the middle.

[0028] Fig. 9 The present invention is a cutaway perspective view of a device for preventing waste gas from overflowing from a steel wire quenching oil tank. Figure 3 .

[0029] Fig.10 The invention is a device for preventing the waste gas in the steel wire quenching oil tank from overflowing. Fig. 9 A partial enlarged schematic diagram of point E in the middle.

[0030] Fig.11 It is a three-dimensional schematic diagram of a device for preventing waste gas from overflowing in a steel wire quenching oil tank of the present invention with the top plate removed.

[0031] The numbers in the figure are:

[0032] 1. trough body; 11. annular sleeve; 12. switch valve; 2. top plate; 21. sealing ring; 22. valve body; 23. lifting groove; 24. lifting ring; 25. second screw rod; 26. second guide rod; 27. second rotary driver; 28. synchronous wheel; 29. ​​synchronous belt; 3. lifting sleeve; 31. first rotary driver; 32. first screw rod; 33. first guide rod; 4. placement rack; 5. telescopic unit; 51. lifting rack; 52. telescopic rack; 53. driving wheel; 54. third rotary driver; 55. locking unit; 551. plug-in hole; 552. plug-in rod; 553. spring; 56. unlocking rod; 6. traction machine; 61. traction rope; 7. cover. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Reference Figure 1 , Figure 2 , Figure 4 and Figure 7 : A device for preventing waste gas from overflowing in a steel wire quenching oil tank, the device is arranged on a tank body 1 of the quenching oil tank; it includes a top plate 2 horizontally arranged just above the tank body 1, there is a gap between the top plate 2 and the tank body 1 in the vertical direction, a lifting sleeve 3 is provided on the outer periphery of the tank body 1 for movement in the vertical direction, a placement rack 4 for supporting the steel wire is provided at the lower part of the top plate 2, the height of the placement rack 4 is less than the height of the gap, during quenching, the lifting sleeve 3 rises and covers the gap, the tank body 1, the top plate 2 and the lifting sleeve 3 together constitute a sealed cavity, the placement rack 4 is located in the sealed cavity, before or after quenching, the lifting sleeve 3 makes way for the gap, and the placement rack 4 supports the steel wire to pass through the gap in the horizontal direction.

[0035] The existing quenching oil tank body 1 is mostly an open structure. Although it is convenient for lifting, the high temperature will cause the oil in the tank body 1 to burn during quenching, and the generated exhaust gas will be directly discharged from the upper part of the tank body 1, which makes the health of the surrounding workers easily affected. In order to overcome the problem of exhaust gas overflow, the existing solution is to set a cover or other sealing parts on the upper part of the tank body 1, but the steel wire needs to be lifted during quenching, and the lifting device is not set on the cover. In this way, when the lifting device lifts the steel wire, the lifting device needs to pass through the cover, and an opening needs to be pre-opened on the cover for the lifting device to move, resulting in the exhaust gas being able to overflow through the opening on the cover during quenching, and the exhaust gas overflow still exists.

[0036] In order to avoid the above situation, the traditional quenching oil tank is improved so that the quenching oil tank body 1 is completely in a sealed state during the quenching operation. The specific structure and working process are as follows:

[0037] The lifting sleeve 3 has a highest position and a lowest position when moving in the vertical direction. When the lifting sleeve 3 moves to the highest position, the lifting sleeve 3 blocks the gap. Figure 1 As shown, at this time, the tank body 1 is in a quenching operation state, and the tank body 1, the top plate 2 and the lifting sleeve 3 together form a sealed cavity, such as Figure 2 As shown, the placement rack 4 receiving the steel wire to be quenched is located in the sealed cavity, and the placement rack 4 can only move in the vertical direction at this time. The placement rack 4 receives the steel wire and descends, so that the steel wire is immersed in the oil in the tank body 1, thereby realizing the quenching operation. When the quenching is completed, the placement rack 4 rises and resets in the vertical direction, and the reset placement rack 4 is located in the gap area. Then the lifting sleeve 3 descends in the vertical direction and makes room for the gap. The placement rack 4 receives the quenched steel wire and moves it out horizontally from the top of the tank body 1. The placement rack 4 drives the steel wire to pass through the gap when it moves out. Then the quenched steel wire is removed by a worker or a manipulator, and the steel wire to be quenched is placed on the placement rack 4. The placement rack 4 drives the steel wire to be quenched to pass through the gap horizontally and reset to the top of the tank body 1. When the placement rack 4 is reset, the lifting sleeve 3 rises in the vertical direction and blocks the gap. A sealed cavity is formed. The placement rack 4 in the sealed cavity drives the steel wire to be quenched to descend into the tank body 1 for quenching, and the cycle repeats. Two valve bodies 22 are arranged on the upper part of the top plate 2. The outer end of one of the valve bodies 22 is connected to a filter unit. Since the filter unit for filtering exhaust gas is a prior art, the specific structure of the filter unit will not be described here. In actual use, the user selects the filter unit according to his own needs.

[0038] By arranging the top plate 2 above the trough body 1, a gap is formed between the top plate 2 and the trough body 1 in the vertical direction, and the placing frame 4 is arranged below the top plate 2, so that the placing frame 4 passes through the gap during the process of driving the steel wire to load and unload, thereby avoiding the need to open an opening on the top plate 2. During quenching, the lifting sleeve 3 blocks the gap, and the trough body 1, the top plate 2 and the lifting sleeve 3 completely form a sealed cavity. The exhaust gas generated by quenching in the trough body 1 is completely gathered in the sealed cavity, and there is no overflow of exhaust gas.

[0039] A first screw rod 32 is rotatably provided on one side of the trough body 1 in the vertical direction, a first guide rod 33 is parallelly provided on one side of the first screw rod 32, an extension portion is fixedly provided on the side of the lifting sleeve 3, the first screw rod 32 and the first guide rod 33 respectively penetrate the extension portion of the lifting sleeve 3 in the vertical direction, the first screw rod 32 is threadedly matched with the extension portion, the first guide rod 33 is slidingly matched with the extension portion in the vertical direction, a first rotation driver 31 for driving the first screw rod 32 to rotate is provided at the upper end of the first screw rod 32, the first rotation driver 31 is preferably a servo motor, the first screw rod 32 is driven to rotate by the first rotation driver 31, so as to drive the lifting sleeve 3 to move in the vertical direction.

[0040] Reference Figure 8 A sealing ring 21 is provided at the lower part of the top plate 2 , and the inner ring height of the sealing ring 21 is higher than the outer ring height of the sealing ring 21 . When the lifting sleeve 3 blocks the gap, the outer ring of the sealing ring 21 contacts the inner wall of the lifting sleeve 3 .

[0041] Since the inner ring height of the sealing ring 21 is higher than the outer ring height of the sealing ring 21, when the sealing cavity is formed, the oil in the trough body 1 undergoes gasification and combustion when quenching the steel wire, causing the air pressure in the sealing cavity to rise. The sealing ring 21 arranged at the bottom of the top plate 2 can provide sealing for the joint between the lifting sleeve 3 and the top plate 2, thereby preventing a small amount of exhaust gas from overflowing from the joint between the lifting sleeve 3 and the top plate 2.

[0042] Reference Figure 2 and Figure 7 Two valve bodies 22 are arranged on the upper part of the top plate 2, one of which is used to discharge the outside air into the sealed cavity after the sealed cavity is formed, and the other valve body 22 is used to discharge the exhaust gas in the sealed cavity.

[0043] The outer end of the valve body 22 for discharging the exhaust gas in the sealing cavity is connected to a filter unit. By arranging two valve bodies 22 on the top plate 2, the exhaust gas in the sealing cavity can be discharged in time during the quenching operation of the tank body 1, thereby avoiding the situation where a large amount of exhaust gas accumulates in the sealing cavity and ensuring that when the lifting sleeve 3 descends, there will be no overflow of high-concentration exhaust gas through the gap.

[0044] Reference Figure 5 : An annular sleeve 11 is provided on the outside of the trough body 1. The trough body 1 is a cylindrical structure. An annular groove is formed between the inner ring wall of the annular sleeve 11 and the outer wall of the trough body 1. The lifting sleeve 3 slides with the annular groove in the vertical direction. A switch valve 12 is provided at the bottom of the annular groove to inject outside air into the annular groove after the sealing cavity is formed.

[0045] When the sealed cavity is formed, there are two joints, one is the joint between the lifting sleeve 3 and the top plate 2, and the other is the joint between the lifting sleeve 3 and the tank body 1. The joint between the lifting sleeve 3 and the top plate 2 is provided with a sealing ring 21, while the joint between the lifting sleeve 3 and the tank body 1 cannot be provided with a sealing ring 21. This is because the temperature of the tank body 1 is relatively high and the service life of the sealing ring 21 is relatively low. As a result, the sealing ring 21 on the tank body 1 needs to be replaced after each period of use, which not only increases the workload but also affects the output of the steel wire. In order to prevent the exhaust gas from overflowing from the joint between the lifting sleeve 3 and the tank body 1 after the sealed cavity is formed, an annular sleeve 11 is provided on the periphery of the tank body 1. After the sealed cavity is formed, the outside air enters the annular groove through the switch valve 12, so that the air pressure in the annular groove is higher than the air pressure in the sealed cavity, so that the exhaust gas in the sealed cavity can be prevented from overflowing from the joint between the lifting sleeve 3 and the tank body 1.

[0046] Reference Figure 3 , Figure 8 and Fig.11 A lifting groove 23 is provided at the bottom of the top plate 2, and a lifting ring 24 is arranged in the lifting groove 23 for movement in the vertical direction. The inner ring side of the sealing ring 21 is fixedly arranged at the bottom of the lifting ring 24. When the lifting ring 24 rises, the sealing ring 21 is squeezed by the outer ring side of the lifting groove 23.

[0047] After extrusion, the outer ring diameter of the sealing ring 21 is reduced, so that the lifting sleeve 3 will not contact the outer ring of the sealing ring 21 when it rises. This is because the inner ring height of the sealing ring 21 is higher than the outer ring height of the sealing ring 21. The lifting sleeve 3 will pass through the sealing ring 21 during its rise. If the sealing ring 21 does not shrink at this time, the outer ring of the sealing ring 21 will directly contact the inner wall of the lifting sleeve 3. During the rise of the lifting sleeve 3, the sealing ring 21 is bent or even damaged by the friction force. In this way, after the sealing cavity is formed, the sealing performance of the sealing ring 21 is reduced, and the service life of the sealing ring 21 is also reduced. It is worth noting that the lifting ring 24 starts to rise when the lifting sleeve 3 rises, so that the sealing ring 21 can be completely contracted before the lifting sleeve 3 passes. When the lifting sleeve 3 covers the gap and the sealing cavity is formed, the lifting ring 24 descends, the sealing ring 21 opens, and the outer ring of the sealing ring 21 contacts the inner wall of the lifting sleeve 3.

[0048] A second screw rod 25 is vertically rotated on the upper part of the lifting ring 24. The second screw rod 25 vertically penetrates the bottom of the lifting groove 23 and slides with the bottom of the lifting groove 23. A plurality of second guide rods 26 are arranged in parallel on one side of the second screw rod 25. The second guide rod 26 is vertically fixed on the lifting ring 24. The second guide rod 26 penetrates the bottom of the lifting groove 23 in the vertical direction and slides with the bottom of the lifting groove 23. Two synchronous wheels 28 are also arranged on the upper part of the top plate 2. The second screw rod 25 penetrates one of the synchronous wheels 28 and is threadedly engaged with the synchronous wheel 28. A second rotation driver 27 for driving the synchronous wheel 28 to rotate is arranged on the upper end of the other synchronous wheel 28. The second rotation driver 27 is preferably a servo motor. A synchronous belt 29 is arranged on the outer periphery of the two synchronous wheels 28. The synchronous belt 29 is respectively matched with the two synchronous wheels 28 for transmission. When the second rotation driver 27 is started, the two synchronous wheels 28 rotate synchronously under the action of the synchronous belt 29, so that the second screw rod 25 can move in the vertical direction, thereby realizing the lifting and lowering of the driving lifting ring 24.

[0049] Reference Figure 6 and Figure 7A traction machine 6 is arranged on the top plate 2, a traction rope 61 is wound inside the traction machine 6, the traction rope 61 passes through the top plate 2 and extends to the lower part of the top plate 2, a telescopic unit 5 is fixedly arranged at the lower end of the traction rope 61, and the telescopic unit 5 is used to drive the placement rack 4 to move in the horizontal direction.

[0050] Reference Figure 6 The telescopic unit 5 includes a lifting frame 51 fixedly connected to the lower end of the traction rope 61, a telescopic frame 52 is slidably arranged inside the lifting frame 51 along the length direction of the lifting frame 51, and the placement frame 4 is fixedly arranged at the bottom of the telescopic frame 52.

[0051] Reference Fig. 9 and Fig.11 : A driving wheel 53 is rotatably provided at the lower part of the top plate 2, and a locking unit 55 for locking the telescopic frame 52 and the lifting frame 51 is provided on the telescopic frame 52. The placement frame 4 has a highest position when moving in the vertical direction. When the placement frame 4 is at the highest position, the upper part of the telescopic frame 52 contacts with the driving wheel 53, and the locking unit 55 is in an unlocked state. When the placement frame 4 does not reach the highest position, the upper part of the telescopic frame 52 is out of contact with the driving wheel 53, and the locking unit 55 is in a locked state.

[0052] A third rotary driver 54 is provided at the end of the driving wheel 53 for driving the driving wheel 53. The third rotary driver 54 is preferably a servo motor. After and before the steel wire is quenched, the driving wheel 53 is driven by the third rotary driver 54 to drive the telescopic frame 52 located on the lifting frame 51 to move in the horizontal direction, thereby realizing the process of loading and unloading the placement frame 4. When unloading is required, the driving wheel 53 drives the telescopic frame 52 to extend from the lifting frame 51, and the placement frame 4 leaves the top of the trough body 1; when loading is required, the driving wheel 53 drives the extended telescopic frame 52 to slide into the lifting frame 51, and the placement frame 4 is located top of the trough body 1.

[0053] Reference Fig.10 and Fig.11 : The locking unit 55 includes a plug-in hole 551 that vertically penetrates the lifting frame 51, and a plug-in rod 552 that is plugged into the plug-in hole 551 is vertically arranged directly below the plug-in hole 551. The plug-in rod 552 is slidably arranged in the telescopic frame 52, and a spring 553 is vertically arranged between the bottom of the plug-in rod 552 and the telescopic frame 52. An unlocking rod 56 is vertically fixed at the lower part of the top plate 2, and the vertical projection of the unlocking rod 56 coincides with the vertical projection of the plug-in rod 552.

[0054] When the placement rack 4 is at the highest position, the unlocking rod 56 is inserted into the plug hole 551, and the plug rod 552 that was originally plugged into the plug hole 551 is squeezed and retracted into the telescopic rack 52. The spring 553 is in a compressed state. At this time, the telescopic rack 52 and the lifting rack 51 are unlocked, and the driving wheel 53 can smoothly push the telescopic rack 52 so that the telescopic rack 52 slides in the lifting rack 51. In this way, the loading and unloading process of the placement rack 4 is realized. When quenching is required, the telescopic rack 52 is completely retracted into the lifting rack 51 under the action of the driving wheel 53. At this time, the plug rod 552 is located just below the unlocking rod 56. At the same time, the traction machine 6 releases the traction rope 61, and the lifting frame 51 drives the telescopic frame 52 to descend. The unlocking rod 56 gradually slides out from the plug-in hole 551, and the plug-in rod 552 gradually slides into the plug-in hole 551 under the action of the reset elastic force of the spring 553, and finally completes the locking. In this way, when the placement frame 4 drives the steel wire to immerse in the oil of the trough body 1, it can ensure that the telescopic frame 52 and the lifting frame 51 are always in a locked state, avoiding the placement frame 4 from shaking greatly during the quenching of the steel wire because the telescopic frame 52 cannot be fixed.

[0055] Reference Fig. 9 and Fig.11 : A cover 7 is fixedly installed outside the traction machine 6.

[0056] By providing the cover 7 outside the traction machine 6 , it is prevented that the exhaust gas overflows from the gap between the traction rope 61 and the top plate 2 .

[0057] Working principle: the lifting sleeve 3 has a highest position and a lowest position when moving in the vertical direction. When the lifting sleeve 3 moves to the highest position, the lifting sleeve 3 blocks the gap. At this time, the trough body 1 is in a quenching operation state. The trough body 1, the top plate 2 and the lifting sleeve 3 together constitute a sealed cavity. The placement rack 4 for receiving the steel wire to be quenched is located in the sealed cavity. The placement rack 4 can only move in the vertical direction at this time. The placement rack 4 receives the steel wire and descends, so that the steel wire is immersed in the oil in the trough body 1, thereby realizing the quenching operation.

[0058] When quenching is completed, the placement rack 4 rises and resets in the vertical direction, and the reset placement rack 4 is located in the gap area. Then the lifting sleeve 3 descends in the vertical direction and makes room for the gap, and the placement rack 4 receives the quenched steel wire and moves it out horizontally from just above the tank body 1. The placement rack 4 drives the steel wire to pass through the gap when moving out, and then the quenched steel wire is removed by the staff or the manipulator, and the steel wire to be quenched is placed on the placement rack 4. The placement rack 4 drives the steel wire to be quenched through the gap horizontally and resets to just above the tank body 1. When the placement rack 4 is reset, the lifting sleeve 3 rises in the vertical direction and blocks the gap, and a sealed cavity is formed. The placement rack 4 located in the sealed cavity drives the steel wire to be quenched to descend into the tank body 1 for quenching, and the cycle repeats. Two valve bodies 22 are arranged on the upper part of the top plate 2, and a filter unit is connected to the outer end of one of the valve bodies 22. Since the filter unit for filtering the exhaust gas is a prior art, the specific structure of the filter unit is not described here. In actual use, the user selects the filter unit according to his own needs. The other valve body 22 is used to let the outside air into the sealed cavity, so that the exhaust gas in the sealed cavity can smoothly flow into the filter unit.

[0059] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A device for preventing waste gas in a steel wire quenching oil tank from overflowing, the device being arranged on a tank body (1) of the quenching oil tank; It is characterized in that The invention comprises a top plate (2) horizontally arranged directly above a trough body (1), a gap being present between the top plate (2) and the trough body (1) in the vertical direction, a lifting sleeve (3) being provided on the periphery of the trough body (1) and being movable in the vertical direction, a placement frame (4) for supporting a steel wire being provided at the bottom of the top plate (2), the height of the placement frame (4) being smaller than the height of the gap, and during quenching, the lifting sleeve (3) rising and covering the gap, the trough body (1), the top plate (2) and the lifting sleeve (3) jointly forming a sealed cavity, the placement frame (4) being located in the sealed cavity, and before or after quenching, the lifting sleeve (3) leaving the gap, and the placement frame (4) supporting the steel wire to pass through the gap in the horizontal direction.

2. The device for preventing the exhaust gas in the steel wire quenching oil tank from overflowing according to claim 1, characterized in that: A sealing ring (21) is arranged at the bottom of the top plate (2), the inner ring height of the sealing ring (21) is higher than the outer ring height of the sealing ring (21), and when the lifting sleeve (3) blocks the gap, the outer ring of the sealing ring (21) contacts the inner wall of the lifting sleeve (3).

3. The device for preventing the exhaust gas in the steel wire quenching oil tank from overflowing according to claim 1, characterized in that: Two valve bodies (22) are arranged on the upper part of the top plate (2), one of the valve bodies (22) is used to discharge external air into the sealed cavity after the sealed cavity is formed, and the other valve body (22) is used to discharge waste gas in the sealed cavity.

4. The device for preventing the exhaust gas in the steel wire quenching oil tank from overflowing according to claim 1, characterized in that: An annular sleeve (11) is sleeved on the outside of the tank body (1). The tank body (1) is a cylindrical structure. An annular groove is formed between the inner ring wall of the annular sleeve (11) and the outer wall of the tank body (1). The lifting sleeve (3) and the annular groove are slidably matched in the vertical direction. A switch valve (12) is provided at the bottom of the annular groove for injecting external air into the annular groove after the sealing cavity is formed.

5. The device for preventing the exhaust gas in the steel wire quenching oil tank from overflowing according to claim 2, characterized in that: A lifting groove (23) is provided at the bottom of the top plate (2), a lifting ring (24) is arranged in the lifting groove (23) to move in the vertical direction, an inner ring side of the sealing ring (21) is fixedly arranged at the bottom of the lifting ring (24), and when the lifting ring (24) rises, the sealing ring (21) is squeezed by the outer ring side of the lifting groove (23).

6. The device for preventing the exhaust gas in the steel wire quenching oil tank from overflowing according to claim 1, characterized in that: A traction machine (6) is arranged on the top plate (2), a traction rope (61) is wound inside the traction machine (6), the traction rope (61) passes through the top plate (2) and extends to the lower part of the top plate (2), a telescopic unit (5) is fixedly arranged at the lower end of the traction rope (61), and the telescopic unit (5) is used to drive the placement rack (4) to move in the horizontal direction.

7. The device for preventing the exhaust gas in the steel wire quenching oil tank from overflowing according to claim 6, characterized in that: The telescopic unit (5) comprises a lifting frame (51) fixedly connected to the lower end of the traction rope (61), a telescopic frame (52) is slidably arranged in the lifting frame (51) along the length direction of the lifting frame (51), and the placement frame (4) is fixedly arranged at the bottom of the telescopic frame (52).

8. The device for preventing the exhaust gas in the steel wire quenching oil tank from overflowing according to claim 7, characterized in that: A driving wheel (53) is rotatably arranged at the lower part of the top plate (2), and a locking unit (55) for locking the telescopic frame (52) and the lifting frame (51) is arranged on the telescopic frame (52). The placement frame (4) has a highest position when moving in the vertical direction. When the placement frame (4) is at the highest position, the upper part of the telescopic frame (52) contacts the driving wheel (53), and the locking unit (55) is in an unlocked state. When the placement frame (4) has not reached the highest position, the upper part of the telescopic frame (52) is out of contact with the driving wheel (53), and the locking unit (55) is in a locked state.

9. The device for preventing the exhaust gas in the steel wire quenching oil tank from overflowing according to claim 8, characterized in that: The locking unit (55) includes a plug hole (551) vertically penetrating through the lifting frame (51), a plug rod (552) plugged into the plug hole (551) is vertically arranged directly below the plug hole (551), the plug rod (552) is slidably arranged in the telescopic frame (52), a spring (553) is vertically arranged between the bottom of the plug rod (552) and the telescopic frame (52), and an unlocking rod (56) is vertically fixedly arranged at the lower part of the top plate (2), and the vertical projection of the unlocking rod (56) coincides with the vertical projection of the plug rod (552).

10. The device for preventing the exhaust gas in the steel wire quenching oil tank from overflowing according to claim 6, characterized in that: A cover (7) is fixedly arranged outside the traction machine (6).

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