Air buffer for rolling type quenching machine

Abstract

The utility model belongs to the related technical field of quenching machines in the steel plate heat treatment industry, and discloses an air buffer for a rolling type quenching machine, which is mounted between a movable frame and a fixed frame which quickly ascend and slowly descend. Comprising a cylinder body, a piston connecting rod, an air inlet throttling valve, an exhaust one-way valve, an air inlet one-way valve and an exhaust throttling valve. One end of the piston connecting rod extends from one end of the cylinder body; the other end of the piston connecting rod is mounted on a screw of the spiral elevator; the other end of the cylinder body is mounted on the movable frame; an intake check valve and an exhaust throttle valve are mounted on one side of the cylinder body; an intake throttle valve and an exhaust one-way valve are mounted on the other end side of the cylinder The piston connecting rod reciprocates in the cylinder body to form two independent air cavities. The device plays a role in protecting the quenching machine and the spiral elevator. And the buffering effect of fast ascending and slow descending is fully achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of quenching machines in the steel plate heat treatment industry, specifically to an air buffer for a roller-type quenching machine. Background Technology

[0002] Roller press quenching machines offer advantages such as strong cooling capacity, uniform cooling, high production efficiency, and good plate shape, making them the preferred equipment for quenching and heat treatment of metal plates and strips. They are widely used in steel plate heat treatment processes. Roller press quenching machines are designed with moving frames, water-blocking rollers, and other vertical moving devices to meet the diverse quenching movement requirements of steel plates.

[0003] Due to process conditions and equipment structure, roller-type quenching machines employ multiple screw lifts to control the vertical movement of the moving frame and the water-blocking roller beam. This, in turn, controls the vertical movement of the roller conveyor, slit nozzles, multiple rows of inclined circular hole jets, and multiple rows of vertical circular hole jets to achieve water cooling of the metal sheet. During water cooling, the extremely rapid cooling rate prevents the high-temperature austenite from undergoing a diffusion-type phase transformation, resulting in a non-diffusion-type phase transformation to form martensite. Martensite is a hard and brittle structure, appearing as laths or needles. Higher carbon content increases hardness but decreases toughness. If the water cooling rate is slightly slower, austenite transforms into bainite. Bainite possesses good overall mechanical properties and, depending on its formation temperature and morphology, can be classified as upper bainite and lower bainite. Therefore, during water cooling, the cooling rates of the steel sheet's surface and interior are inconsistent; the surface cools faster and contracts first, while the interior cools slower and contracts relatively later. This generates internal stress within the steel sheet. When the internal stress exceeds the yield strength of the steel plate, it may cause deformation and vertical movement of the plate. This will cause the moving frame and the water-blocking roller beam to move up and down as well. Because the steel plate deforms extremely quickly, the screw jack cannot move up and down in time, leading to irreversible damage to the screw jack's lead screw. Furthermore, a rapid descent after ascent will also affect the accuracy of the quenching machine. Therefore, a buffer device capable of rapid ascent and slow descent is needed. Currently, the hydraulic cylinders used in roller quenching machines have slow response times, failing to meet user requirements and representing a pressing issue that needs to be addressed.

[0004] Patent CN215214509U discloses an air buffer, including a cylinder, a piston rod, an end cap, and a seal. The cylinder has an open end. This device mainly solves the buffering problem of opening and closing the glove box lid of an automobile, and is unrelated to the air buffer for the quenching machine of this utility model.

[0005] Patent CN116464854A discloses a self-adjusting air buffer, including a tank, a tank cover, and a breather. The breather contains a self-adjusting shaft extending into the buffer chamber and vertically connected to a diaphragm. The outer periphery of the diaphragm is clamped between the tank and the tank cover, dividing the buffer into an air chamber and a liquid chamber. A venting groove is provided at the upper part of the self-adjusting shaft. The breather has an air inlet and, along the axial direction, sequentially arranged a first sealing ring, a first groove, a second sealing ring, a second groove, and a third sealing ring. The first sealing ring is near the air inlet. The first groove connects to the air chamber through a vent hole, and the second groove connects to the outside through an exhaust hole. The axial thickness of the first sealing ring, the second sealing ring, the third sealing ring, the first groove, and the second groove is less than the axial length of the venting groove. This invention is unrelated to the air buffer for a quenching machine. Utility Model Content

[0006] The purpose of this utility model is to provide an air buffer for a roller-type quenching machine, which solves the problem mentioned in the background art that the metal plate may suddenly deform up and down during the quenching process. If the screw jack cannot move up and down in time, it will cause irreversible damage to the screw jack screw. Also, if it falls quickly after rising, it will affect the accuracy of the quenching machine.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an air buffer for a roller-type quenching machine, comprising: a cylinder body 3, a piston connecting rod 8, an intake throttle valve 4, an exhaust one-way valve 5, an intake one-way valve 9, and an exhaust throttle valve 10; one end of the piston connecting rod 8 extends into the cylinder body 3 from one end, and the other end of the piston connecting rod 8 is mounted on the lead screw of a screw jack 17; the other end of the cylinder body 3 is mounted on a movable frame 18; the intake one-way valve 9 and the exhaust throttle valve 10 are mounted on the side of one end of the cylinder body 3; the intake throttle valve 4 and the exhaust one-way valve 5 are mounted on the side of the other end of the cylinder body 3.

[0008] Furthermore, the air buffer for the roller-type quenching machine also includes a wear-resistant ring 6 for the hole and a combined seal 7, which are installed in the groove at one end of the piston connecting rod 8 and form a telescopic mechanism after being assembled with the cylinder body 3. The cylinder body 3 is lubricated with grease.

[0009] Furthermore, the air buffer for the roller-type quenching machine also includes a guide sleeve 11. The outer side of the guide sleeve 11 has a groove and is assembled with the cylinder body 3 through a sealing ring 12 to form a seal. The inner side of the guide sleeve 11 has a groove and is assembled with the piston connecting rod 8 through a shaft wear-resistant ring 13, a shaft step seal 14, and a dustproof ring 15 to form a seal.

[0010] Furthermore, the air buffer for the roller-type quenching machine also includes a cylinder cover 16, which is sleeved on the piston connecting rod 8, and its outer side is threadedly connected to the cylinder body 3 and pressed against the guide sleeve 11.

[0011] Furthermore, the air buffer for the roller-type quenching machine also includes a spherical bearing 1 and a locking nut 2; the other end of the piston connecting rod 8 is equipped with a spherical bearing 1 and a locking nut 2 for connecting the lead screw of the screw jack 17; the other end of the cylinder body 3 is equipped with a spherical bearing 1 and a locking nut 2 for connecting the moving frame 18.

[0012] Furthermore, the piston rod 8 is initially extended; the piston rod 8 reciprocates inside the cylinder 3, forming two independent air chambers, the rod chamber being the upper chamber and the rodless chamber being the lower chamber.

[0013] Furthermore, the air buffer used in the roller-type quenching machine is used for rapid ascent and slow descent. When the metal plate 19 suddenly deforms by up-and-down movement, causing the moving frame 18 to move abnormally upward, the cylinder 3 moves upward, the air in the lower cavity is compressed, the exhaust check valve 5 and the intake throttle valve 4 open, and exhaust is rapidly discharged. The upper cavity intake check valve 9 and the exhaust throttle valve 10 open, and air is rapidly introduced, causing the moving frame 18 to rise rapidly. When the external force on the moving frame 18 disappears, it moves downward under the action of gravity, which in turn causes the cylinder 3 to move downward. The air in the upper cavity is compressed, the intake check valve 9 closes, the exhaust throttle valve 10 throttles, and exhaust is slowly discharged. The lower cavity exhaust check valve 5 closes, the intake throttle valve 4 throttles, and air is slowly introduced, causing the moving frame 18 to descend slowly.

[0014] Compared with the prior art, this utility model provides an air buffer for a roller-type quenching machine, which has the following beneficial effects:

[0015] 1. When the metal plate suddenly deforms abnormally upward, causing the moving frame to move upward, the air buffer of the roller quenching machine can react quickly, rise rapidly, and instantly offset the abnormal displacement, effectively avoiding rigid impact and playing a full buffering role.

[0016] 2. After the moving frame moves upward, it will move downward under the action of gravity. The buffer can make the moving frame slowly descend to the lowest position, preventing the impact of rapid descent from affecting the roll gap accuracy of the quenching machine and the stability of the components.

[0017] 3. The air damper itself has a simple structure, mainly composed of a cylinder, piston rod, seals, and intake and exhaust components, and has a low manufacturing cost; it is easy to install, simply by connecting and fixing the upper and lower joint bearings; daily maintenance is relatively simple, mainly checking whether the air pressure is stable and whether the seals are intact, and generally does not require professional maintenance skills and equipment. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 A schematic diagram of a quenching machine for which an air buffer is used in a roller-type quenching machine according to this utility model is provided.

[0020] Figure 2 A schematic diagram of a quenching machine for which an air buffer is used in a roller-type quenching machine according to this utility model is provided.

[0021] Figure 3 A schematic diagram of a quenching machine for which an air buffer is used in a roller-type quenching machine according to this utility model is provided.

[0022] Figure 4 This is a schematic diagram of an air buffer for a roller-type quenching machine proposed in this utility model;

[0023] In the diagram: 1. Spherical plain bearing; 2. Locking nut; 3. Cylinder block; 4. Intake throttle valve; 5. Exhaust check valve; 6. Wear ring for bore; 7. Combination seal; 8. Piston connecting rod; 9. Intake check valve; 10. Exhaust throttle valve; 11. Guide sleeve; 12. Sealing ring; 13. Shaft wear ring; 14. Shaft step seal; 15. Dust seal; 16. Cylinder head; 17. Screw jack; 18. Moving frame; 19. Metal plate; 20. Air damper. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] An air buffer for a roller press quenching machine specifically includes a spherical bearing 1, a locking nut 2, a cylinder body 3, an exhaust throttle valve 10, an intake check valve 9, a wear-resistant ring for the bore 6, a combination seal 7, a piston connecting rod 8, an exhaust check valve 5, an intake throttle valve 4, a guide sleeve 11, a sealing ring 12, a shaft wear-resistant ring 13, a shaft step seal 14, a dustproof ring 15, and a cylinder head 16.

[0026] The top of the cylinder 3 is threaded with an intake check valve 9 and an exhaust throttle valve 10, and the bottom of the cylinder is threaded with an intake throttle valve 4, an exhaust check valve 5, a lock nut 2, and a spherical bearing 1, which can realize one-way exhaust, one-way intake, exhaust speed regulation, and intake speed regulation with rapid response.

[0027] Among them, the intake throttle valve 4 is forced to open during use. It does not exhaust air when intake is in progress, and only plays the role of intake throttling; it does not intake air when exhaust is in progress, and does not play the throttling role when exhaust is in progress.

[0028] Among them, the exhaust throttle valve 10 is also forced to open during use. It does not take in air when exhausting, and only plays the role of throttling exhaust; it does not exhaust air when taking in air, and does not play the throttling role when taking in air.

[0029] The wear-resistant ring 6 and the combined seal 7 are installed in the groove of the piston connecting rod 8 and assembled with the cylinder body 3 to form a telescopic mechanism. The cylinder body is lubricated with grease.

[0030] The sealing ring 12 is installed in the outer groove of the guide sleeve 11 and assembled with the cylinder body 3 to form a seal; the shaft wear ring 13, shaft step seal 14, and dustproof ring 15 are installed in the inner groove of the guide sleeve 11 and assembled with the piston connecting rod 8 to form a seal.

[0031] The cylinder head 16 is fitted into the piston connecting rod 8 and threadedly connected to the cylinder body 3 and pressed against the guide sleeve 11.

[0032] The piston rod 8 is equipped with a spherical bearing 1 and a locking nut 2 at its end. The piston rod 8 reciprocates inside the cylinder 3, forming two independent air chambers: the rod chamber is the upper chamber, and the rodless chamber is the lower chamber.

[0033] The spherical bearing 1 on the piston connecting rod 8 is mounted on the lead screw of the screw jack 17, and the spherical bearing 1 on the cylinder 3 is mounted on the moving frame 18. Under the action of gravity, the piston connecting rod 8 is initially extended. When the metal plate 19 suddenly moves up and down, causing the moving frame 18 to move abnormally upward, the cylinder 3 moves upward, the air in the lower cavity is compressed, the exhaust check valve 5 and the intake throttle valve 4 open, and exhaust is quickly discharged. The intake check valve 9 and the exhaust throttle valve 10 in the upper cavity open, and air is quickly introduced, causing the moving frame 18 to rise rapidly. When the external force on the moving frame 18 disappears, it moves downward under the action of gravity, the cylinder 3 moves downward, the air in the upper cavity is compressed, the intake check valve 9 closes, the exhaust throttle valve 10 throttles, and exhaust is slowly discharged. The exhaust check valve 5 in the lower cavity closes, the intake throttle valve 4 throttles, and air is slowly introduced, causing the moving frame to descend slowly.

[0034] More specifically, the threaded end of the spherical bearing 1 is first fitted with a locking nut 2 and then inserted into the threaded hole at the bottom of the cylinder 3. After the installation depth is adjusted, the locking nut 2 is used to lock it in place.

[0035] After installing the wear-resistant ring 6 and the combination seal 7 in the groove of the piston connecting rod 8, lubricant is applied. The shaft wear-resistant ring 13, shaft step seal 14, and dust ring 15 are installed in the inner groove of the guide sleeve 11 from bottom to top. Then, the guide sleeve 11, shaft wear-resistant ring 13, shaft step seal 14, and dust ring 15 are installed together on the connecting rod of the piston connecting rod 8. Pay attention to the direction during installation. The sealing ring 12 is installed in the outer groove of the guide sleeve 11.

[0036] After applying a small amount of lubricating grease to the inner wall of the cylinder body 3, the piston connecting rod 8 and guide sleeve 11 are then installed into the cylinder body 3 to ensure good sealing. After the cylinder cover 16 is threaded onto the piston connecting rod 8 and the cylinder body 3, the guide sleeve 11 is pressed to form a telescopic mechanism that can push and pull the piston connecting rod 8 up and down. The end with the rod is the upper cavity, and the end without the rod is the lower cavity.

[0037] The intake throttle valve 4 and the exhaust check valve 5 are installed in the corresponding threaded holes at the bottom of the cylinder 3, and the intake check valve 9 and the exhaust throttle valve 10 are installed in the corresponding threaded holes at the top of the cylinder 3.

[0038] The threaded end of the spherical bearing 1 is first fitted with a locking nut 2 and then inserted into the threaded hole at the end of the piston rod 8. After adjusting the installation depth, it is locked with the locking nut 2.

[0039] Figures 1-4 As shown, the air buffer 20 is the air buffer for the roller-type quenching machine proposed in this utility model; the inner hole of the bearing of the top spherical bearing 1 is pin-mounted to the connecting seat of the upper screw jack 17, and the inner hole of the bearing of the bottom spherical bearing 1 is pin-mounted to the connecting seat of the moving frame 18; under the action of gravity, the moving frame 18 moves downwards together with the cylinder 3, the lower cavity slowly draws in air, and the upper cavity slowly discharges air. The air buffer 20 is in a stretched state. When the metal plate 19 suddenly undulates and deforms, the moving frame 18... When the abnormal upward movement occurs, cylinder 3 moves upward, the air in the lower chamber is compressed, exhaust check valve 5 and intake throttle valve 4 open, exhausting quickly, while intake check valve 9 and exhaust throttle valve 10 in the upper chamber open, intake quickly, and the moving frame 18 rises rapidly. When the external force on the moving frame 18 disappears, it moves downward under the action of gravity, cylinder 3 moves downward, the air in the upper chamber is compressed, intake check valve 9 closes, exhaust throttle valve 10 throttles, exhausting slowly, while exhaust check valve 5 in the lower chamber closes, intake throttle valve 4 throttles, intake slowly, and the moving frame 18 descends slowly.

[0040] The above provides a detailed description of the air buffer for a roller-type quenching machine provided by this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An air buffer for a roller-type quenching machine, characterized in that, The air buffer for the roller press quenching machine includes: a cylinder (3), a piston rod (8), an intake throttle valve (4), an exhaust check valve (5), an intake check valve (9), and an exhaust throttle valve (10); one end of the piston rod (8) extends into the cylinder (3) from one end, and the other end of the piston rod (8) is mounted on the screw of the screw jack (17); the other end of the cylinder (3) is mounted on the moving frame (18); the intake check valve (9) and the exhaust throttle valve (10) are installed on the side of one end of the cylinder (3); the intake throttle valve (4) and the exhaust check valve (5) are installed on the side of the other end of the cylinder (3).

2. An air buffer for a roller-type quenching machine according to claim 1, characterized in that, The air buffer for the roller-type quenching machine also includes a wear-resistant ring (6) for the hole and a combined seal (7). The two are installed in the groove at one end of the piston connecting rod (8) and form a telescopic mechanism after being assembled with the cylinder (3). The cylinder (3) is lubricated with grease.

3. An air buffer for a roller-type quenching machine according to claim 1, characterized in that, The air buffer for the roller quenching machine also includes a guide sleeve (11). The outer side of the guide sleeve (11) has a groove and is assembled with the cylinder body (3) through a sealing ring (12) to form a seal. The inner side of the guide sleeve (11) has a groove and is assembled with the piston connecting rod (8) through a shaft wear-resistant ring (13), a shaft step seal (14), a dustproof ring (15) to form a seal.

4. An air buffer for a roller-type quenching machine according to claim 3, characterized in that, The air buffer for the roller press quenching machine also includes a cylinder cover (16), which is fitted onto the piston connecting rod (8), and its outer side is threadedly connected to the cylinder body (3) and pressed against the guide sleeve (11).

5. An air buffer for a roller-type quenching machine according to claim 1, characterized in that, The air buffer for the roller quenching machine also includes a spherical bearing (1) and a locking nut (2); the other end of the piston connecting rod (8) is equipped with a spherical bearing (1) and a locking nut (2) for connecting the screw of the screw jack (17); the other end of the cylinder (3) is equipped with a spherical bearing (1) and a locking nut (2) for connecting the moving frame (18).

6. An air buffer for a roller-type quenching machine according to any one of claims 1-5, characterized in that, The piston rod (8) is initially extended; the piston rod (8) reciprocates inside the cylinder (3) to form two independent air chambers, the rod chamber being the upper chamber and the rodless chamber being the lower chamber.

7. An air buffer for a roller-type quenching machine according to claim 6, characterized in that, The air buffer used in the roller quenching machine is used for rapid ascent and slow descent. When the metal plate (19) suddenly rises and falls and deforms, causing the moving frame (18) to move abnormally upward, the cylinder (3) moves upward, the air in the lower cavity is compressed, the exhaust check valve (5) and the intake throttle valve (4) open, and the exhaust is discharged quickly. The upper cavity intake check valve (9) and the exhaust throttle valve (10) open, and the air is introduced quickly. The moving frame (18) rises quickly. When the external force on the moving frame (18) disappears, it moves downward under the action of gravity, which causes the cylinder (3) to move downward. The air in the upper cavity is compressed, the intake check valve (9) closes, the exhaust throttle valve (10) throttles, and the exhaust is discharged slowly. The lower cavity exhaust check valve (5) closes, the intake throttle valve (4) throttles, and the air is introduced slowly. The moving frame (18) descends slowly.

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