Vertical transmission chain box with novel structure

Abstract

The utility model belongs to the technical field of petroleum drilling and production mechanical equipment, and discloses a vertical transmission chain box with a novel structure. The input shaft and the output shaft are arranged in parallel, and the chain is in vertical transmission. A push disc clutch is installed at the end of a chain box input shaft assembly, an inner gear ring is designed to be connected with a clutch friction disc, meanwhile, a connecting disc is designed to be connected with the inner gear ring and a chain wheel, and rolling bearings are arranged inside and outside the chain wheel. A friction hub is designed at the end of the output shaft, and a pneumatic tire clutch and a connecting disc are installed outside the friction hub to serve as a reaction torque releasing device. According to the chain box, independent hanging or separation can be achieved through power, and abrasion and equipment loss caused by idle running of the chain are avoided. Meanwhile, the anti-torque release device arranged on the output shaft can release the deformation energy of the drill rod, the drill rod cannot rapidly and reversely rotate, and the safety performance of petroleum drilling equipment is greatly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of oil drilling and production machinery and equipment, specifically relating to a novel vertical transmission chain box. Background Technology

[0002] Currently, the chain box and sprockets commonly used in oil drilling and workover rigs are of a constantly rotating structure. When the power unit is running, the chain rotates continuously, and the chain box cannot be disengaged independently. Even when the downstream equipment stops working, the chain remains in an idle state, which can easily lead to chain wear and equipment damage over time. Furthermore, the chain box lacks a torque relief device, which can easily cause the drill pipe to rotate rapidly in the opposite direction, potentially leading to safety accidents. Utility Model Content

[0003] To address the aforementioned issues, a novel vertical transmission chain box structure was designed, which allows for independent disengagement or engagement of the chain box power. Simultaneously, an anti-torque release device is incorporated to slowly release the deformation energy of the drill rod, enhancing safety.

[0004] The technical solution adopted by this utility model is as follows: a novel vertical transmission chain box, the structure of which includes: a sprocket, a chain, a box body, an input shaft, an output shaft, a pneumatic clutch, a friction hub, a pusher clutch, an internal gear ring, a connecting disc, a connecting plate, a bearing seat, an input flange, and an output flange, etc. The input shaft and output shaft are arranged in parallel, and the chain drives vertically. A pusher clutch is installed at the end of the input shaft assembly of the chain box. The internal gear ring with involute splines is designed to connect to the clutch friction disc. At the same time, the connecting disc is designed to connect the internal gear ring at one end and the sprocket at the other end. The connecting disc and the sprocket are connected by bolts and locating pins. A rolling bearing is set inside the sprocket and then installed on the input shaft. A rolling bearing is set outside the sprocket and installed in the bearing seat of the chain box. A bearing cover and a rotating shaft lip seal are installed on the outside of the bearing seat for sealing. At the same time, the rotating shaft lip seal is placed on the outer surface of the connecting disc, and the connecting disc can rotate with the sprocket. A friction hub is designed at the end of the output shaft. The friction hub is connected to the output shaft by a common flat key. An air tire clutch is installed on the outside of the friction hub as a torque release device. The outer ring of the air tire clutch is connected to the chain box bearing seat through a connecting plate.

[0005] This invention employs the aforementioned technical solution. When the chain box needs to operate, the push-plate clutch intakes air, the friction disc engages with the internal gear ring, and power is transmitted to the sprocket via the connecting disc, causing the chain to rotate and drive the connecting flange for power output. When the chain box needs to be disengaged, the push-plate clutch releases air, the friction disc separates from the internal gear ring, and only the input shaft idles; the sprocket does not rotate, the chain does not work, and no power transmission occurs. This chain box can be engaged or disengaged independently, preventing wear and equipment damage caused by the chain idling. Simultaneously, after the push-plate clutch disengages, the pneumatic clutch mounted on the output shaft intakes air, the air chamber tightly engages with the friction hub, stopping the output shaft from rotating, releasing the deformation energy of the drill rod, preventing rapid reverse rotation of the drill rod, and achieving counter-torque release. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0007] See Figure 1 A novel vertical transmission chain box structure includes: a box body 9, within which a power input shaft 18 and an output shaft 7 are arranged parallel to each other, enabling vertical chain transmission; a push plate clutch 20 is installed at the end of the power input shaft 18, and an internal gear ring 19 with involute splines is designed to connect to the friction disc of the push plate clutch 20, while the internal gear ring 19 is bolted to a connecting disc 17, and the connecting disc 17 is bolted to a sprocket 14 using a positioning pin 11. The installation of the positioning pin 11 ensures assembly accuracy and connection stability. A rolling bearing 13 is installed inside the sprocket 14, and a rolling bearing 15 is installed outside. The rolling bearing 15 is supported by a bearing housing 16 and sealed with a bearing cover 10 and a rotating shaft lip seal 21. The rotating shaft lip seal 21 is placed on the outer surface of the connecting plate 17. When the input flange 12 is working, if the air circuit system of the push plate clutch 20 is inflated, the push plate clutch 20 drives the internal gear ring 19 to rotate. At the same time, the internal gear ring 19 transmits power to the connecting plate 17 and the sprocket 14, driving the sprocket 14 and the chain 22 to rotate. If the air circuit system of the push plate clutch 20 is deflated, the internal gear ring 19 does not rotate, and the connecting plate 17, sprocket 14, and chain 22 also do not rotate. This scheme realizes two working states: the chain is working and it is not working. At the same time, a friction hub 6 is designed at the end of the output shaft 7. The two are connected by a flat key. A pneumatic clutch 4 is installed outside the friction hub 6. The outer ring of the pneumatic clutch is bolted to the connecting plate 3. The inner ring of the connecting plate 3 is connected to the bearing housing 2 and fixed to the chain box body 9. When the quick-release valve 5 releases air, the sprocket 8 drives the output shaft 7 to rotate, transmitting power to the output flange 1. At this time, the friction hub 6 idles. When the quick-release valve 5 introduces air, the air bladder of the pneumatic clutch engages tightly with the friction hub 6, stopping the friction hub 6 from rotating. This stops the output shaft 7 from rotating, preventing the drill pipe from rapidly reversing.

Claims

1. A novel vertical transmission chain box, characterized by: Sprockets, chains, housings, input shafts, output shafts, pneumatic clutches, friction hubs, pusher clutches, internal gear rings, connecting discs, connecting plates, bearing housings, bearing caps, input flanges, and output flanges; the input shaft assembly and output shaft assembly are arranged in parallel, with the chain driving vertically; The chain box input shaft assembly is equipped with a push plate clutch at the end. The internal gear ring is designed to be connected to the clutch friction plate. At the same time, a connecting plate is designed to connect the internal gear ring at one end and the sprocket at the other end. The connecting plate and the sprocket are connected by bolts and positioning pins. The sprocket is equipped with a rolling bearing inside and is installed on the input shaft. The sprocket is also equipped with a rolling bearing outside and is installed in the chain box bearing seat. A friction hub is installed at the end of the output shaft of the chain box. The friction hub and the output shaft are connected by a common flat key. An air tire clutch is installed on the outside of the friction hub. The outer ring of the air tire clutch is connected to the chain box bearing seat through a connecting plate.

2. The novel vertical transmission chain box according to claim 1, characterized in that, The internal gear ring and the clutch friction disc are connected by an involute spline.

3. The novel vertical transmission chain box according to claim 1, characterized in that, The bearing cover is fitted with a rotating shaft lip seal and placed on the outer surface of the connecting plate.

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