Inner wall quenching device

Abstract

This invention relates to the field of quenching equipment technology, and provides an internal wall quenching device, comprising: a heating structure disposed on the inner wall of a cylinder, a driving unit connected to the heating structure via a linkage mechanism to adjust the diameter of the heating structure; and an inner wall support structure supported on the inner wall of the cylinder, the inner wall support structure including a first slider and an inner support structure, with a pressure chamber between the first sliders, the first sliders pushing the inner support structure to adjust the diameter of the inner wall support structure. The internal wall quenching device provided by this invention utilizes a linkage mechanism to adjust the diameter of the heating structure and utilizes the expansion and contraction of the pressure chamber to adjust the diameter of the inner wall support structure. By setting an adjustable-diameter heating structure and outer support structure, the quenching needs of cylinders / steel pipes with different inner diameters can be met without replacing the heating structure and inner wall support structure, thus improving quenching efficiency, expanding the applicability of the device, and increasing work efficiency.

Description

Technical Field

[0001] This invention relates to the field of quenching equipment technology, and in particular to an internal wall quenching device. Background Technology

[0002] Hydraulic cylinders are crucial components in mechanical equipment, enabling operational actions. To meet the demanding workload of construction machinery, they require high quality. As a primary component of the hydraulic cylinder, the cylinder barrel's inner wall surface endures the impact of high-pressure hydraulic oil and the continuous friction from the piston and seals during operation. Generally, quenching is used to increase the hardness of the cylinder barrel's inner wall and refine its metallographic structure to achieve wear resistance.

[0003] Currently, the main structure of the internal wall quenching device for cylindrical structures such as hydraulic cylinders includes: a heating coil, a double-layer copper cooling water rod, a universal ball bearing support, and a quenching train. The heating coil and universal ball bearing support are rigidly connected to the double-layer copper cooling water rod. The quenching train carries the cylinder / steel pipe and moves linearly on the quenching train track. The cylinder / steel pipe is made concentric with the heating coil by adjusting the pneumatic support.

[0004] The existing technology has the following problems:

[0005] Since the heating coil and support are both integral fixed structures with non-adjustable diameters, they can only be used for quenching cylinders / steel pipes with fixed inner diameters and are not suitable for quenching cylinders / steel pipes with other inner diameters, resulting in low quenching efficiency. If different sizes of cylinders / steel pipes are used, heating coils and supports of different sizes need to be replaced, which is cumbersome. Summary of the Invention

[0006] This invention provides an internal wall quenching device to solve the defects of existing quenching devices where the diameters of the heating coil and the support are not adjustable, and they can only be used for quenching internal walls of fixed sizes or by replacing the heating coil and support with those of corresponding specifications, resulting in low quenching efficiency and cumbersome operation.

[0007] This invention provides an internal wall quenching device, comprising:

[0008] A heating structure is provided on the inner wall of the cylinder. A drive unit is connected between the heating structures through a linkage mechanism to adjust the diameter of the heating structure. During operation, the heating structure is radially equidistant from the inner wall of the cylinder and moves along the cylinder axis.

[0009] An inner wall support structure is provided, which is supported on the inner wall of the cylinder. The inner wall support structure includes a first slider and an inner support structure. A pneumatic chamber is provided between the first slider and the first slider pushes the inner support structure to adjust the diameter of the inner support structure so that the diameter of the inner support structure is consistent with that of the inner wall of the cylinder.

[0010] According to the present application, an internal wall quenching device is provided, wherein the driving unit includes a first structural frame, a screw, a fixing block, and a second slider. The first structural frame is arranged along the axial direction of the cylinder, the fixing block is fixed on the first structural frame, the screw passes through the fixing block and its other end is fixedly connected to the second slider, the second slider is slidably arranged on the first structural frame, and the linkage mechanism is respectively connected to the fixing block, the heating structure, and the second slider.

[0011] According to the internal wall quenching device provided in this application, the internal wall support structure further includes a second structural frame. The internal support structure includes a support body and a roller. The first slider is in sealed sliding contact with the support body, and the other side of the support body is in sealed sliding contact with the second structural frame. The roller is disposed on the outer end face of the support body.

[0012] An inner wall quenching device according to this application further includes a cooling structure disposed between the heating structure and the inner wall support structure.

[0013] According to the present application, an internal wall quenching device is provided, wherein the cooling structure includes a water spray plate, and the outer side of the water spray plate is provided with a plurality of nozzles in the circumferential direction.

[0014] According to the present application, an inner wall quenching device further includes a base and a traction structure. The traction structure includes a traction rope, a first bracket and a second bracket. The first bracket is located at one end of the base, and the second bracket is located at the other end of the base. The first bracket is connected to the first structural frame through the traction rope, and the second bracket is connected to the inner wall support structure through the traction rope.

[0015] According to the internal wall quenching device provided in this application, the base is provided with a first guide rail, the bottom of the first bracket is provided with a stop slider, the first bracket is slidably mounted on the first guide rail via the stop slider, the stop slider is provided with a stop hole for inserting a locking pin, and a section of the first guide rail is provided with a pin hole that mates with the stop hole.

[0016] According to the present application, an inner wall quenching device further includes an outer support structure, which includes a third bracket and a roller. The roller is rotatably mounted on the top of the third bracket, and a pulley is provided below the third bracket. The third bracket is slidably mounted on the first guide rail via the pulley.

[0017] According to the internal wall quenching device provided in this application, the external support structure further includes a fourth bracket, a turbine, and a worm gear. The fourth bracket is horizontally arranged and connected between the third bracket and the pulley. The fourth bracket is provided with a slide rail. The worm gear is arranged perpendicular to the length direction of the base. The turbine gear is connected to the worm gear and moves along the axial direction of the worm gear. The two ends of the turbine gear are slidably connected to the slide rail through a sliding groove.

[0018] An internal wall quenching device according to this application further includes a telescopic rod, which is connected between the third support and the turbine.

[0019] The present invention provides an internal wall quenching device that uses a linkage mechanism to adjust the diameter of the heating structure and uses the expansion and contraction of the air pressure chamber to adjust the diameter of the internal wall support structure. By setting up a heating structure and an external support structure with adjustable diameters, the device can meet the quenching needs of cylinders / steel pipes with different inner diameters without the need to replace the heating structure and the internal wall support structure, thereby improving the quenching efficiency, expanding the applicability of the device, and increasing work efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the internal structure of the inner wall quenching device provided by the present invention;

[0022] Figure 2 This is a schematic diagram of the external structure of the inner wall quenching device provided by the present invention;

[0023] Figure 3 This is a schematic diagram of the heating structure provided by the present invention;

[0024] Figure 4 yes Figure 3 The left view;

[0025] Figure 5 This is a schematic diagram of the inner wall support structure provided by the present invention;

[0026] Figure 6 This is a schematic diagram of the external support structure provided by the present invention;

[0027] Figure 7 yes Figure 6 Left view when the cylinder is being supported;

[0028] Figure 8This is a schematic diagram of the structure of the fourth support provided by the present invention;

[0029] Figure 9 This is a schematic diagram of the traction structure provided by the present invention;

[0030] Figure 10 yes Figure 9 The left view.

[0031] Figure label:

[0032] 100: Heating structure; 200: Cooling structure; 300: Inner wall support structure;

[0033] 400: Cylinder; 500: External support structure; 600: Traction structure;

[0034] 700: Support; 800: Base; 801: Guide rail;

[0035] 101: Screw; 102: Linkage mechanism; 103: Fixed block;

[0036] 104: First structural frame; 105: Second slider; 106: Heating coil;

[0037] 301: Air pressure chamber; 302: First slider; 303: Support body;

[0038] 304: Second structural frame; 305: Rollers;

[0039] 601: Tow rope box; 602: Tow rope; 603: First support;

[0040] 604: Stop slider; 605: Stop hole; 606: Pin hole;

[0041] 607: Second stent;

[0042] 501: Third support; 502: Roller; 503: Pulley;

[0043] 504: Fourth support; 505: Turbine; 506: Worm gear;

[0044] 507: Slide rail; 508: Slide groove; 509: Telescopic rod;

[0045] 510: Turn the handle. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0047] The following is combined with Figures 1 to 10 This invention describes an internal wall quenching apparatus. The apparatus mainly consists of two parts: an outer support structure 500 for supporting the outer wall and a quenching structure for quenching. The quenching structure includes a heating structure 100, a cooling structure 200, and an internal wall support structure 300. The following description uses the internal wall quenching of a cylinder 400 as an example.

[0048] The heating structure 100 is disposed on the inner wall of the cylinder 400. The drive unit is connected to the heating structure 100 through a linkage mechanism 102 to adjust the diameter of the heating structure 100. During operation, the heating structure 100 is radially equidistant from the inner wall of the cylinder 400 and moves along the axis of the cylinder 400. The inner wall support structure 300 is supported on the inner wall of the cylinder 400. The inner wall support structure 300 includes a first slider 302 and an inner support structure. A pneumatic chamber 301 is provided between the first sliders 302. The first sliders 302 push the inner support structure to adjust the diameter of the inner support structure so that the diameter of the inner support structure is consistent with that of the inner wall of the cylinder.

[0049] Specifically, the heating structure 100 is a split structure, which can be heated by a heating coil 106. Based on the annular structure of the cylinder 400, the heating coil 106 can be connected by a connecting rod and divided into at least two sections. The connecting rod mechanism 102 is mechanically driven to move, and the connecting rod mechanism 102 supports the heating coil 106, thereby adjusting the diameter of the heating coil 106. The method for adjusting the diameter of the heating structure 100 is described in detail in the following embodiment. Of course, other types of heating elements can also be used to replace the heating coil of this embodiment.

[0050] The air pressure tube is inserted into the air pressure chamber 301. The pressure change inside the air pressure chamber 301 drives the first slider 302 to move, which in turn drives the inner support structure to move, adjusting the diameter of the inner wall support structure 300. The method for adjusting the diameter of the inner wall support structure 300 is described in detail in the following embodiment.

[0051] The present invention provides an internal wall quenching device that uses a linkage mechanism 102 to adjust the diameter of the heating structure 100 and uses the expansion and contraction of the air pressure chamber 301 to adjust the diameter of the internal wall support structure 300. By setting an adjustable diameter heating structure 100 and an external support structure 500, the heating structure 100 and the internal wall support structure 300 do not need to be replaced, thus meeting the quenching needs of cylinders / steel pipes with different inner diameter specifications, improving quenching efficiency, expanding the applicability of the device, and increasing work efficiency.

[0052] In one embodiment of the present invention, the drive unit includes a first structural frame 104, a screw 101, a fixing block 103, and a second slider 105. The first structural frame 104 is arranged along the axial direction of the cylinder 400. The fixing block 103 is fixed on the first structural frame 104. The screw 101 passes through the fixing block 103 and its other end is fixedly connected to the second slider 105. The second slider 105 is slidably arranged on the first structural frame 104. The linkage mechanism 102 is respectively connected to the fixing block 103, the heating structure 100, and the second slider 105. Specifically, the fixing block 103 has an internal thread to facilitate engagement with the screw 101. The fixing block 103 is fixed to the first structural frame 104 and does not move with the screw 101. The screw 101 can be manually rotated to adjust the sliding of the second slider 105 relative to the first structural frame 104. The first structural frame 104 has an opening through which the second slider 105 can pass, allowing it to move between the openings. When the second slider 105 moves, it correspondingly drives the linkage mechanism 102 to move, thereby adjusting the diameter of the heating coil 106. Figure 3 and Figure 4 As shown, the linkage mechanism 102 and the heating coil 106 are divided into at least four groups. The first end of the linkage mechanism 102 is hinged to the fixed block 103, the second end is hinged to the heating coil 106, and the third end is hinged to the second slider 105. When the rotating screw 101 drives the second slider 105 to translate to the left, the diameter of the heating coil 106 increases; when the rotating screw 101 drives the second slider 105 to translate to the right, the diameter of the heating coil 106 decreases. Based on the heating structure 100 of this embodiment, the worker can adjust the diameter of the heating coil 106 by rotating the screw 101 to meet the quenching needs of cylinders 400 with different inner wall sizes.

[0053] In one embodiment of the present invention, the inner wall support structure 300 further includes a second structural frame 304. The inner support structure includes a support body 303 and a roller 305. A first slider 302 is in sealed sliding contact with the support body 303 (the contact surface between the two can be an inclined end face, which forms a 45° angle with the end face of the second support frame). The other side of the support body 303 is in sealed sliding contact with the second structural frame 304 (the contact surface between the two can be an inclined end face, which forms a 45° angle with the end face of the second support frame). The roller 305 is disposed on the outer end face of the support body 303. Specifically, as shown... Figure 5 As shown, the first slider 302 is located on the left and right sides of the air pressure chamber 301, respectively. Air pressure is supplied to the air pressure chamber 301 through the air pressure pipe. When the pressure inside the air pressure chamber 301 increases, it pushes the first slider 302 to move to the left and right sides of the air pressure chamber 301. The inclined end face causes the support body 303 to move outwards, and the pulley 503 contacts the inner wall of the cylinder 400, thereby increasing the diameter of the inner wall support structure 300. When the pressure inside the air pressure chamber 301 decreases, the first slider 302 moves towards the air pressure chamber 301, and simultaneously, the support body 303 moves inwards, thereby decreasing the diameter of the inner wall support structure 300. Furthermore, multiple (at least four) supports 303 and rollers 305 should be arranged along the circumference to ensure stable support and to ensure that the heating coil 106, the through hole of the second structural frame 304, and the cylinder 400 axis are concentric.

[0054] In one embodiment of the present invention, the inner wall quenching device further includes a cooling structure 200, which is disposed between the heating structure 100 and the inner wall support structure 300. Further, the cooling structure 200 includes a water spray plate, with a plurality of nozzles arranged circumferentially on its outer side. Specifically, the cooling structure 200 can be connected via a first structural frame 104 and a second structural frame 304, with the nozzles positioned at a 45° angle to the inner wall of the cylinder 400, spraying water towards the rear end to avoid the heating coil 106.

[0055] In one embodiment of the present invention, the inner wall quenching device further includes a base 800 and a traction structure 600. The traction structure 600 includes a traction rope 602, a first bracket 603, and a second bracket 607. The first bracket 603 is located at one end of the base 800, and the second bracket 607 is located at the other end of the base 800. The first bracket 603 is connected to the first structural frame 104 of the heating structure 100 via the traction rope 602, and the second bracket 607 is connected to the inner wall support structure 300 via the traction rope 602. In this embodiment, the first bracket 603 and the second bracket 607 are respectively provided at both ends of the base 800. The first bracket 603 provides the traction direction for the traction rope 602. Figure 2 and Figure 9As shown, the first bracket 603 at the left end is equipped with a traction rope box 601 for winding and releasing the traction rope 602, and the second bracket 607 at the right end provides a fixed fulcrum for the traction rope 602. The traction rope 602 passes through the inside of the cylinder 400 and is sequentially connected to the first structural frame 104 (thus connecting to the heating structure 100), the cooling structure 200, and the second structural frame 304. In this embodiment, a flexible traction rope 602 is used instead of the rigid connection between the heating structure 100, the cooling structure 200, and the inner wall support structure 300 in the prior art. By using the traction of the traction rope 602, it is applicable to scenarios where the axial length of the cylinder 400 is long, as only the inner wall quenching structure needs to be dragged using the traction rope 602. On the other hand, it avoids rigid connections and is applicable to scenarios where the cylinder 400 has a large curvature, ensuring the concentricity of the heating coil 106, the cooling structure 200, and the inner wall support structure 300 with the inner wall of the cylinder 400, ensuring uniform heating, cooling, and support, and consistent quenching layer thickness and hardness.

[0056] In one embodiment of the present invention, a first guide rail is provided on the base 800, and a stop slider 604 is provided at the bottom of the first bracket 603. The first bracket 603 is slidably mounted on the first guide rail via the stop slider 604. The stop slider 604 is provided with a stop hole 605 for inserting a locking pin, and a section (i.e., the left section) of the first guide rail is provided with a pin hole 606 that mates with the stop hole 605. In this embodiment, as... Figure 2 As shown, the first bracket 603 on the left end can be slidably mounted on the first guide rail, which is suitable for machining cylinders 400 with various axial length specifications. When it is moved into place, the locking pin is inserted into the stop hole 605 and the pin hole 606, so that the stop slider 604 is relatively fixed with the first guide rail, ensuring that the traction rope 602 remains stable during the quenching process.

[0057] In one embodiment of the present invention, an outer support structure 500 is further included. The outer support structure 500 includes a third bracket 501 and a roller 502. The roller 502 is rotatably disposed on the top of the third bracket 501, and a pulley 503 is provided below the third bracket 501. The third bracket 501 is slidably disposed on the first guide rail via the pulley 503. In this embodiment, the outer support structure 500 is used to support the outer wall of the cylinder 400. The third bracket 501 can slide along the direction of the first guide rail via the pulley 503, thereby satisfying the support of the outer wall of the cylinder 400 with various length specifications. Specifically, at least two sets of outer support structures 500 are arranged along the length direction of the base 800, and the outer support structures 500 support the cylinder 400 at a certain tilt angle (the tilt angle can be selected as 3°) so that cooling water can be discharged to the rear end. Each set of outer support structures 500 has two third brackets 501 and rollers 502 arranged on both sides of the cylinder 400, and the cylinder 400 is supported by the two rollers 502. In addition, the outer support structure 500 also includes a support 700 located at the right end of the base 800. The cylinder 400 can be adjusted to be concentric with the support 700 using the roller 502. In the initial working state, the heating structure 100, the cooling mechanism and the inner support structure can be stored in the support 700. They can be pulled out from the support 700 by the traction rope 602 for quenching operations.

[0058] In addition, the above-mentioned guide rails 801 (i.e. the first guide rail) are arranged in three parallel lines to ensure the stable movement of the first support 603 and at the same time meet the arrangement requirements of the two third supports 501.

[0059] In one embodiment of the present invention, the outer support structure 500 further includes a fourth bracket 504, a turbine 505, and a worm gear 506. The fourth bracket 504 is horizontally arranged and connected between the third bracket 501 and the pulley 503. A slide rail 507 is provided on the fourth bracket 504. The worm gear 506 is arranged perpendicular to the length direction of the base 800. The turbine 505 is engaged with the worm gear 506 and moves along the axial direction of the worm gear 506. Both ends of the turbine 505 are slidably connected to the slide rail 507 through a sliding groove 508. Specifically, as shown... Figure 8 As shown, the fourth support 504 is triangular in shape and has two slide rails 507 on it. By rotating the handle 510, the worm gear 506 rotates, thereby driving the turbine 505 to move along the direction of the worm gear 506. The bottom of the turbine 505 has two sliding grooves 508, which are slidably connected to the two slide rails 507. In this embodiment, the turbine 505 and the worm gear 506 can drive the two rollers 502 to move along the direction of the slide rails 507, which can support cylinders 400 / steel pipes of different diameters.

[0060] In one embodiment of the present invention, the inner wall quenching device further includes a telescopic rod 509, which is connected between the third support 501 and the turbine 505. In this embodiment, the telescopic rod 509 is an electrically operated telescopic rod 509, which is used to adjust the height of the roller 502.

[0061] In summary, the internal wall quenching device provided by the present invention has the following beneficial effects:

[0062] 1. The heating structure 100 and the inner wall support structure 300 have diameter adjustment function, which can meet the quenching needs of different inner wall size specifications;

[0063] 2. The heating structure 100, cooling structure 200 and inner wall support structure 300 are pulled by a flexible traction rope 602, replacing the rigid connection in the prior art. This ensures that the quenching device can be coaxial with the cylinder 400, ensuring uniform quenching in all parts of the inner wall of the cylinder 400, and avoiding the problem caused by excessive axial length of the cylinder.

[0064] 3. An external support structure 500 is adopted, which is adjustable in axial direction, radial direction and height, so as to meet the quenching treatment needs of cylinder barrels 400 / steel pipes with different diameters, axial lengths and heights.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An internal wall quenching device, characterized in that, include: A heating structure is provided on the inner wall of the cylinder. A drive unit is connected between the heating structures through a linkage mechanism to adjust the diameter of the heating structure. During operation, the heating structure is radially equidistant from the inner wall of the cylinder and moves along the cylinder axis. An inner wall support structure is provided, which is supported on the inner wall of the cylinder. The inner wall support structure includes a first slider and an inner support structure. A pneumatic chamber is provided between the first slider and the first slider pushes the inner support structure to adjust the diameter of the inner support structure so that the diameter of the inner support structure is consistent with that of the inner wall of the cylinder.

2. The inner wall quenching device according to claim 1, characterized in that, The drive unit includes a first structural frame, a screw, a fixing block, and a second slider. The first structural frame is arranged along the axial direction of the cylinder. The fixing block is fixed on the first structural frame. The screw passes through the fixing block and its other end is fixedly connected to the second slider. The second slider is slidably arranged on the first structural frame. The linkage mechanism is respectively connected to the fixing block, the heating structure, and the second slider.

3. The inner wall quenching device according to claim 1, characterized in that, The inner wall support structure also includes a second structural frame. The inner support structure includes a support body and rollers. The first slider is in sealed sliding contact with the support body. The other side of the support body is in sealed sliding contact with the second structural frame. The rollers are disposed on the outer end face of the support body.

4. The inner wall quenching device according to claim 1, characterized in that, It also includes a cooling structure, which is disposed between the heating structure and the inner wall support structure.

5. The inner wall quenching device according to claim 4, characterized in that, The cooling structure includes a water spray plate, and multiple nozzles are provided on the outer side of the water spray plate in the circumferential direction.

6. The inner wall quenching device according to claim 2, characterized in that, It also includes a base and a traction structure. The traction structure includes a traction rope, a first bracket and a second bracket. The first bracket is located at one end of the base and the second bracket is located at the other end of the base. The first bracket is connected to the first structural frame through the traction rope and the second bracket is connected to the inner wall support structure through the traction rope.

7. The inner wall quenching device according to claim 6, characterized in that, The base is provided with a first guide rail, and the bottom of the first bracket is provided with a stop slider. The first bracket is slidably mounted on the first guide rail via the stop slider. The stop slider is provided with a stop hole for inserting a locking pin, and a section of the first guide rail is provided with a pin hole that mates with the stop hole.

8. The inner wall quenching device according to claim 7, characterized in that, It also includes an external support structure, which includes a third bracket and a roller. The roller is rotatably mounted on the top of the third bracket, and a pulley is provided below the third bracket. The third bracket is slidably mounted on the first guide rail via the pulley.

9. The inner wall quenching device according to claim 8, characterized in that, The external support structure also includes a fourth bracket, a turbine, and a worm gear. The fourth bracket is horizontally arranged and connected between the third bracket and the pulley. The fourth bracket is provided with a slide rail. The worm gear is arranged perpendicular to the length direction of the base. The turbine gear is connected to the worm gear and moves along the axial direction of the worm gear. The two ends of the turbine gear are slidably connected to the slide rail through grooves.

10. The inner wall quenching device according to claim 9, characterized in that, It also includes a telescopic rod, which connects the third bracket and the turbine.

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