Pneumatic actuator structure for pneumatic ash conveying

Abstract

The utility model discloses a pneumatic actuator structure for pneumatic ash conveying, which comprises a support, an air cylinder is rotatably arranged on the support, the air cylinder is horizontally arranged, the telescopic end of the air cylinder is rotatably connected with a torsion bar through a connecting piece, the connecting piece comprises a connecting fork head, a first pin shaft hole is formed in the connecting fork head, and a second pin shaft hole is formed in the first pin shaft hole. One end of the torsion bar is provided with a second pin shaft hole which is coaxial with the first pin shaft hole, bushings are rotatably arranged in the first pin shaft hole and the second pin shaft hole, pin shafts used for connecting the connecting fork head and the torsion bar are arranged in the bushings, and the other end of the torsion bar is connected with a valve shaft of the feeding valve and drives the valve shaft to rotate. According to the pneumatic actuator, direct contact between the pin shaft and the connecting fork head can be avoided, abrasion of the pin shaft is reduced, effective control over the feeding valve by the pneumatic actuator is kept, and the service life of the pneumatic actuator is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of steel casting, in particular to a pneumatic actuator structure for pneumatic ash conveying. Background Art

[0002] Pneumatic ash conveying is a dust removal ash conveying method widely adopted in the steel industry at present. Common dense-phase pneumatic ash conveying uses a bin pump as a conveying unit for ash conveying. With the requirements of ultra-low emission transformation and carbon neutrality goals in steel mills, a pneumatic ash conveying system is needed in large-area dust removal transformation. The feed valve is a valve that must be set on the outlet pipeline of the bin pump in pneumatic conveying and is used for the material conveying of the bin pump in pneumatic conveying.

[0003] The existing feed valve generally controls the rotation of its valve shaft through a pneumatic actuator, and then controls the rotation of its valve plate to realize the opening and closing of the feed valve. The existing pneumatic actuator generally drives the torsion bar to rotate through a connecting forkhead, and then drives the rotation of the valve shaft. The connecting forkhead and the torsion bar are only connected by a pin shaft. In actual use, the pin shaft is in direct contact and friction with the connecting forkhead. After the pin shaft is worn excessively, a gap will be generated, resulting in the inability of the feed valve to be effectively closed and affecting the operation of the system. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pneumatic actuator structure for pneumatic ash conveying, which can avoid the direct contact between the pin shaft and the connecting forkhead, reduce the wear of the pin shaft, maintain the effective control of the pneumatic actuator over the feed valve, and improve the service life of the pneumatic actuator.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a pneumatic actuator structure for pneumatic ash conveying, including a support, on which a cylinder is rotatably provided. The cylinder is horizontally arranged, and a torsion bar is rotatably connected to the telescopic end through a connecting member. The connecting member includes a connecting forkhead, on which a first pin hole is provided. One end of the torsion bar is provided with a second pin hole coaxially arranged with the first pin hole. A bushing is rotatably arranged in the first pin hole and the second pin hole, and a pin shaft for connecting the connecting forkhead and the torsion bar is arranged in the bushing. The other end of the torsion bar is connected to the valve shaft of the feed valve and drives its rotation.

[0006] A further improvement scheme of the utility model is that the pin shaft includes a shaft body, a limiting piece is arranged at the top end of the shaft body, a pin hole is penetrated through the shaft body and fixed by a split pin, and the connecting forkhead is located between the limiting piece and the split pin.

[0007] A further improvement scheme of the utility model is that the diameters of the first pin hole and the second pin hole are the same.

[0008] A further improvement of the present utility model is that at least one oil storage ring groove is provided on the inner wall of the bushing, and an oil storage ring groove is also provided on the outer wall of the bushing at the contact with the connecting fork head.

[0009] A further improvement of the present utility model is that a connecting ring is provided at one end of the torsion bar connected to the valve shaft of the feed valve. The valve shaft is fixed within the connecting ring. A break is provided on the ring body of the connecting ring, and raised portions are provided on the ring body on both sides of the break. The two raised portions are fixedly connected by bolts.

[0010] A further improvement of the present utility model is that a corrugated dust-proof sleeve is fixedly sleeved outside the telescopic end of the cylinder.

[0011] The beneficial effects of the present utility model are as follows:

[0012] By providing a bushing outside the pin shaft, the present utility model can avoid the direct contact between the pin shaft and the connecting fork head, reduce the wear of the pin shaft, maintain the effective control of the pneumatic actuator over the feed valve, and improve the service life of the pneumatic actuator.

[0013] By providing oil storage ring grooves on the inner and outer walls of the bushing, the present utility model can increase the contact area of the lubricating oil through the oil storage ring grooves and store a certain amount of lubricating oil, reduce the friction between the bushing and the connecting fork head and the pin shaft, and thus reduce wear.

[0014] By providing a corrugated dust-proof sleeve on the telescopic end of the cylinder, the present utility model can reduce the contact between dust and other debris and the cylinder telescopic rod, and improve the service life of the cylinder. Description of the Drawings

[0015] Figure 1 is the main front view schematic diagram of the structure of the present utility model.

[0016] Figure 2 is the partial enlarged main front view sectional schematic diagram of the structure of the present utility model.

[0017] Figure 3 is the top view schematic diagram of the structure of the present utility model.

[0018] In the figure, 1 - support, 2 - cylinder, 3 - torsion bar, 4 - connecting fork head, 5 - first pin shaft hole, 6 - second pin shaft hole, 7 - bushing, 8 - pin shaft, 9 - shaft body, 10 - limit piece, 11 - pin hole, 12 - oil storage ring groove, 13 - connecting ring, 14 - break, 15 - raised portion, 16 - bolt, 17 - corrugated dust-proof sleeve, 18 - valve shaft of the feed valve. Detailed Embodiments

[0019] The present utility model will be further illustrated below in conjunction with the drawings and specific embodiments. Embodiment

[0020] Combination Figures 1 to 3 As can be seen, a pneumatic actuator structure for pneumatic ash conveying includes a support 1, on which a cylinder 2 is rotatably provided. The cylinder 2 is horizontally arranged, and a torsion bar 3 is rotatably connected to the telescopic end through a connecting member. The connecting member includes a connecting fork head 4, on which a first pin hole 5 is provided. One end of the torsion bar 3 is provided with a second pin hole 6 coaxially arranged with the first pin hole 5. A bushing 7 is rotatably provided in the first pin hole 5 and the second pin hole 6. A pin 8 for connecting the connecting fork head 4 and the torsion bar 3 is provided in the bushing 7. The other end of the torsion bar 3 is connected to the valve shaft of the feed valve and drives it to rotate.

[0021] The pin 8 includes a shaft body 9, a limit piece 10 is provided at the top of the shaft body 9, a pin hole 11 is penetrated through the shaft body 9 and fixed by a split pin. The connecting fork head 4 is located between the limit piece 10 and the split pin.

[0022] The connecting fork head 4 includes two mutually parallel first straight plates and a second straight plate for connecting the two first straight plates. The first straight plate and the second straight plate are perpendicularly arranged. The first pin hole 5 is provided on the first straight plate, and the second straight plate is connected to the telescopic end of the cylinder 2. Preferably, the length of the bushing 7 is the same as the maximum distance between the two first straight plates.

[0023] The diameters of the first pin hole 5 and the second pin hole 6 are the same. Preferably, the connecting fork head 4 and the bushing 7 are made of Q345 steel.

[0024] At least one oil storage ring groove 12 is provided on the inner wall of the bushing 7. An oil storage ring groove 12 is also provided on the outer wall of the bushing 7 at the contact with the connecting fork head 4. Preferably, a chamfer is provided at the notch of the oil storage ring groove 12.

[0025] A connecting ring 13 is provided at one end of the torsion bar 3 connected to the valve shaft of the feed valve. The valve shaft is fixed in the connecting ring 13. A break 14 is provided on the ring body of the connecting ring 13. Raised portions 15 are provided on the ring bodies on both sides of the break 14, and the two raised portions 15 are fixedly connected by bolts 16.

[0026] A corrugated dust-proof sleeve 17 is fixedly sleeved outside the telescopic end of the cylinder 2. One end of the corrugated dust-proof sleeve 17 is fixedly connected to one surface of the cylinder 2, and the other end is fixedly connected to the piston rod of the cylinder 2.

[0027] The working principle of a pneumatic actuator structure for pneumatic ash conveying provided by the utility model is as follows: During operation, when the telescopic end of the cylinder 2 extends, it drives the torsion bar 3 to rotate through the connecting fork head 4 at its end, and then drives the valve shaft 18 of the feed valve to rotate.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall equally be included within the scope of patent protection of the present utility model.

Claims

1. A pneumatic actuator structure for pneumatic ash conveying, characterized in that: It includes a support (1), on which a cylinder (2) is rotatably provided. The cylinder (2) is horizontally arranged, and a torsion bar (3) is rotatably connected to the telescopic end through a connecting piece. The connecting piece includes a connecting fork head (4). A first pin shaft hole (5) is provided on the connecting fork head (4). A second pin shaft hole (6) coaxial with the first pin shaft hole (5) is provided at one end of the torsion bar (3). A bushing (7) is rotatably provided in the first pin shaft hole (5) and the second pin shaft hole (6). A pin shaft (8) for connecting the connecting fork head (4) and the torsion bar (3) is provided in the bushing (7). The other end of the torsion bar (3) is connected to the valve shaft of the feed valve and drives it to rotate.

2. The pneumatic actuator structure for pneumatic ash conveying according to claim 1, characterized in that: The pin shaft (8) includes a shaft body (9). A limiting piece (10) is provided at the top end of the shaft body (9). A pin hole (11) is provided through the shaft body (9) and fixed by a split pin. The connecting fork head (4) is located between the limiting piece (10) and the split pin.

3. The pneumatic actuator structure for pneumatic ash conveying according to claim 1, wherein: The diameters of the first pin shaft hole (5) and the second pin shaft hole (6) are the same.

4. A pneumatic actuator structure for pneumatic ash conveying according to claim 1, characterized in that: At least one oil storage ring groove (12) is provided on the inner wall of the bushing (7). An oil storage ring groove (12) is also provided on the outer wall of the bushing (7) at the contact position with the connecting fork head (4).

5. The pneumatic actuator structure for pneumatic ash conveying according to claim 1, wherein: A connecting ring (13) is provided at the end of the torsion bar (3) connected to the valve shaft of the feed valve. The valve shaft is fixed in the connecting ring (13). A break (14) is provided on the ring body of the connecting ring (13). Protruding parts (15) are provided on the ring bodies on both sides of the break (14). The two protruding parts (15) are fixedly connected by bolts (16).

6. The pneumatic actuator structure for pneumatic ash conveying according to claim 1, characterized in that: A corrugated dust cover (17) is fixedly sleeved outside the telescopic end of the cylinder (2).

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