Automatic opening and closing of the lifting hook mechanism

Abstract

The automatic opening and closing lifting clamp mechanism disclosed by the application comprises a shell, a driving wheel is arranged in the shell, the driving wheel is connected with valve shaft a and valve shaft b through a transmission structure, a left valve is sleeved on the side wall of valve shaft a, a lock tongue is connected to the left valve away from valve shaft a, a right valve is sleeved on the side wall of valve shaft b, and a lock groove matched with the lock tongue is formed on the right valve away from the end of valve shaft b. The automatic opening and closing lifting clamp mechanism adopts a transmission belt to drive a transmission wheel and a toothless gear to realize the opening and closing of the lifting clamp mechanism, thereby ensuring the working effect of the lifting clamp mechanism, greatly reducing the crank connecting rods in the lifting clamp mechanism, and prolonging the service life of the lifting clamp opening and closing mechanism.

Description

Technical Field

[0001] This invention belongs to the field of petroleum machinery and equipment technology, and specifically relates to an automatic opening and closing hoisting mechanism. Background Technology

[0002] Automation of oil drilling operations is the development trend of oil drilling machinery. Various automated pipe string handling equipment with a high degree of automation, such as hydraulic hoists, iron drills, and power catwalks, are increasingly being used in oil drilling operations.

[0003] Taking hydraulic lifting clamps as an example, in drilling operations, hydraulic lifting clamps are essential tools for suspending drilling tools when lifting or lowering them. During operation, the reliability and automation level of these clamps are required to be very high. Currently, most existing hydraulic lifting clamps achieve automatic opening and closing functions by transmitting power through a crank-connecting rod mechanism to open and close the valve. Because the overall transmission chain of the crank-connecting rod is relatively long and the connecting rod bears a large torque during movement, it also has to withstand reverse impact loads. Therefore, the crank-connecting rod mechanism in the current structure is prone to damage, and replacing damaged parts is time-consuming and labor-intensive, which seriously affects the efficiency of drilling operations. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic opening and closing lifting clamp mechanism that uses belt drive instead of traditional crank connecting rod drive, thereby extending the service life of the lifting clamp mechanism.

[0005] The technical solution adopted in this invention is an automatic opening and closing hanging mechanism, including a housing, a drive wheel is provided inside the housing, and the drive wheel is connected to a valve shaft a and a valve shaft b respectively through a transmission structure. A left valve is sleeved on the side wall of valve shaft a, and a locking tongue is connected to the left valve at a position away from valve shaft a. A right valve is sleeved on the side wall of valve shaft b, and a locking groove that cooperates with the locking tongue is opened at the end of the right valve away from valve shaft b.

[0006] The invention is further characterized in that,

[0007] The transmission structure includes transmission wheels a and b, guide wheels a and b, and guide wheels c and d disposed on both sides of the drive wheel inside the housing, with transmission wheels a, guide wheels d and guide wheels a on the same side.

[0008] The transmission wheel a has gear teeth and pulley teeth on its side wall. The pulley teeth are connected to the guide wheel a and the guide wheel d. The gear teeth are meshed with the toothed gear I and toothed gear II. The toothed gear I and toothed gear II are sleeved on the side wall of the valve shaft a. The smooth edge of the toothed gear I is fixed with a connecting arm. The surface of the connecting arm has a pin hole that is perpendicular to the surface. A pin is inserted into the pin hole and fixed to the left valve.

[0009] The end face of the missing tooth gear II has a groove along its circumference. A slider that can slide relative to the missing tooth gear I is installed in the groove. The slider is fixed to the end face of the missing tooth gear I. The end face of the missing tooth gear II is connected to a connecting rod by a pin. The end of the connecting rod away from the missing tooth gear II is connected to a locking tongue by a pin. The groove is a through groove. The arc angle of the groove on the end face of the missing tooth gear II is equal to the arc angle of the tooth of the missing tooth gear II.

[0010] The transmission wheel b has gear teeth and pulley teeth on its sidewalls. The pulley teeth are connected to the guide wheel b and the guide wheel c. The gear teeth mesh with the toothed gear a and toothed gear b. The toothed gear a and toothed gear b are sleeved on the sidewall of the valve shaft b. The toothed gear a has a connecting arm fixed to its smooth edge. The surface of the connecting arm has a pin hole that is perpendicular to the surface of the connecting arm. A pin passes through the pin hole and is fixed to the right valve.

[0011] A groove is formed on the end face of the toothed gear b along the circumference of the toothed gear b. A slider that can slide relative to the toothed gear b is provided in the groove. The slider is fixed to the end face of the toothed gear a. The angle of the arc of the groove on the end face of the toothed gear b is equal to the angle of the arc of the tooth of the toothed gear b.

[0012] The driving wheel is connected in sequence to guide wheel a, drive wheel a, guide wheel d, driving wheel, guide wheel b, drive wheel b and guide wheel c via a transmission belt, and the transmission belt is a closed loop.

[0013] The driving wheel is connected in sequence to guide wheel a, drive wheel a and guide wheel d via a transmission belt; and the driving wheel is connected in sequence to guide wheel b, drive wheel b and guide wheel c via another transmission belt, forming a closed loop.

[0014] A transmission belt is specifically a type of belt-shaped, chain-shaped, or flexible transmission structure.

[0015] The beneficial effects of this invention are:

[0016] (1) The present invention uses a transmission belt to drive the transmission wheel and a toothed gear to realize the opening and closing of the hanging mechanism. While ensuring the working effect of the hanging mechanism, it greatly reduces the crank connecting rod inside the hanging mechanism and extends the service life of the hanging mechanism.

[0017] (2) The present invention achieves the following when closing: the valve closes first and then the latch closes, and when opening: the latch opens first and then the valve opens, through the movement and coordination between the components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the automatic opening and closing hanging clamp mechanism of the present invention;

[0019] Figure 2 This is a schematic diagram of the automatic opening and closing hanging mechanism of the present invention, showing the closing of the valve and the opening of the locking tongue;

[0020] Figure 3This is a schematic diagram of the fully closed structure of the automatic opening and closing hanging clamp mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the missing tooth gear I in the automatic opening and closing hanging mechanism of the present invention;

[0022] Figure 5 This is a schematic diagram of the missing tooth gear II in the automatic opening and closing hanging mechanism of the present invention.

[0023] In the diagram, 1. Housing, 2. Drive belt, 3. Drive wheel a, 4. Slightly toothed gear I, 5. Valve shaft a, 6. Slightly toothed gear II, 7. Connecting rod, 8. Left valve, 9. Locking tongue, 10. Right valve, 11. Drive wheel b, 12. Guide wheel a, 13. Guide wheel b, 14. Guide wheel c, 15. Guide wheel d, 16. Drive wheel, 17. Valve shaft b, 18. Slightly toothed gear a, 19. Slightly toothed gear b. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] The structure of the automatic opening and closing clamping mechanism of this invention is as follows: Figure 1 As shown, the device includes a housing 1, inside which is a drive wheel 16. The drive wheel 16 can be driven by a power source that can generate rotational motion, such as a motor or a hydraulic motor. The drive wheel 16 is connected to a valve shaft a5 and a valve shaft b17 respectively through a transmission structure. The valve shaft a5 and the valve shaft b17 are located on both sides of the drive wheel 16. A left valve 8 is sleeved on the side wall of the valve shaft a5, and a locking tongue 9 is connected to the left valve 8 at a position away from the valve shaft a5. A right valve 10 is sleeved on the side wall of the valve shaft b17, and a locking groove that cooperates with the locking tongue 9 is opened at the end of the right valve 10 away from the valve shaft b17.

[0026] The transmission structure includes transmission wheels a3 and b11, guide wheels a12 and b13, and guide wheels c14 and d15 disposed on both sides of the drive wheel 16. Transmission wheels a3, d15, and a12 are on the same side. The drive wheel 16 is connected in sequence to guide wheels a12, a3, d15, b13, b11, and c14 via a transmission belt 2. The drive wheel can also be connected in sequence to guide wheels a12, a3, and d15 via another transmission belt 2. The drive wheel 16 is connected in sequence to guide wheels b13, b11, and c14 via another transmission belt 2. The transmission belt 2 is a closed loop. This allows the drive wheel b11 to rotate counterclockwise when the drive wheel a3 rotates clockwise, thereby controlling the opening and closing of the left valve 8 and the right valve 10. The transmission belt 2 can be a belt, chain, or flexible transmission structure.

[0027] The sidewalls of transmission wheel a3 and transmission wheel b11 are respectively provided with gear teeth and pulley teeth. The pulley teeth of transmission wheel a3 are connected to guide wheel a12 and guide wheel d15 through transmission belt 2. The gear teeth mesh with toothed gear I4 and toothed gear II6. The pulley teeth of transmission wheel b11 are connected to guide wheel b13 and guide wheel c14 through transmission belt 2. The gear teeth mesh with toothed gear a18 and toothed gear b19.

[0028] Missing gear I4 and missing gear II6 are sleeved on the side wall of valve shaft a5, and missing gear a18 and missing gear b19 are sleeved on the side wall of valve shaft b17. The smooth edges of missing gear I4 and missing gear a18 are fixed with connecting arms. The surface of the connecting arms has pin holes vertically opened, and pins pass through the pin holes and are fixed to the left valve 8 and the right valve 10 respectively. That is, when the transmission wheel a3 or the transmission wheel b11 drives the missing gear I4 or the missing gear a18 to rotate, the left valve 8 or the right valve 10 will rotate accordingly under the action of the connecting arms.

[0029] The end face of the missing tooth gear II6 is connected to the connecting rod 7 via a pin, and the end of the connecting rod 7 away from the missing tooth gear II6 is connected to the locking tongue 9 via a pin.

[0030] like Figure 2 As shown, the teeth of transmission wheel a3 rotate clockwise to disengage from the missing tooth gear I4, at which point the left valve 8 closes. Similarly, the teeth of transmission wheel b11 rotate counterclockwise to disengage from the missing tooth gear a18, at which point the right valve 10 closes. The sliders on the missing tooth gear I4 and the missing tooth gear a18 respectively abut against one end of the sliding groove on the missing tooth gear II6 and the missing tooth gear b19.

[0031] like Figure 3 As shown, the transmission wheel a3 continues to rotate clockwise, and under the action of the slider, it drives the teeth of the toothed gear II6 to mesh with the teeth of the transmission wheel a3. As the transmission wheel a3 continues to rotate, the toothed gear II6 rotates accordingly, and drives the locking tongue 9 to move through the connecting rod 7, thereby completing the closing of the locking tongue 9.

[0032] like Figure 4 As shown, a slider is fixed to the end face of the toothed gear I4, and the structure of the toothed gear a18 is the same as that of the toothed gear I4.

[0033] like Figure 5As shown, a groove is cut along the circumference of the end face of the missing tooth gear II6. The groove is a through groove. The slider fixed to the end face of the missing tooth gear I4 is located in the groove and can slide relative to it. The groove guides and limits the slider. The arc angle of the groove on the end face of the missing tooth gear II6 is equal to the arc angle of the tooth of the missing tooth gear II6. This ensures that when the transmission wheel a3 rotates to the last section of the missing tooth gear II6, the groove also abuts against the slider. This prevents the transmission wheel a3 from spinning freely or the transmission wheel a3 and the missing tooth gear II6 from still meshing and rotating, but the groove has already reached the limit position, which would damage the equipment. The structure and connection relationship of the missing tooth gears a18 and b19 are the same as those of the missing tooth gears I4 and II6.

[0034] When this invention is in operation, it mainly consists of two processes: closing the hanging clamp and opening the hanging clamp.

[0035] When the clamp needs to be closed, drive wheels a3 and b11 mesh with toothed gears I4 and a18 respectively. At this time, drive wheels a3 and b11 disengage from toothed gears II6 and b19, activating drive wheel 16. Under the action of the guide wheels, the torque of drive wheel 16 is transmitted to drive wheels a3 and b11 through drive belt 2. Taking the left side of the device as an example, drive wheel a3 rotates clockwise, while toothed gear I4, which meshes with it, rotates counterclockwise. The rotation of the toothed gear I4 drives the left valve 8, which is connected to the pin shaft, to rotate counterclockwise. During the counterclockwise rotation of the toothed gear I4, due to the limiting effect of the upper slider and the slide groove, it will simultaneously drive the toothed gear II6 to rotate counterclockwise. The counterclockwise rotation of the toothed gear II6 is transmitted through the connecting rod 7, which drives the locking tongue 9 to rotate around the axis located on the left valve 8. When the toothed gear I4 and the transmission wheel a3 have completely meshed, the left valve 8 is completely closed. The same applies to the right side, which makes the right valve 10 completely closed.

[0036] At this point, the locking tongue 9 is still open. When the meshing part of the toothed gear I4 and the transmission wheel a3 is completely completed, due to the limiting effect of the slider on it, the toothed gear II6 is driven to rotate counterclockwise until the first tooth on its left side just meshes with the transmission wheel a3. The toothed gear II6 will continue to rotate under the drive of the transmission wheel a3, while the toothed gear I4 and the transmission wheel a3 have now completely disengaged. The groove of the toothed gear II6 allows the slider on the toothed gear I4 to slide, so the toothed gear I4 no longer rotates, that is, the left and right valves remain completely closed. The counterclockwise rotation of the toothed gear II6 will drive the connecting rod 7 to move, which in turn drives the locking tongue 9 to continue to rotate counterclockwise until the locking tongue 9 is completely closed. At this point, the locking action of the hanging clamp is completed.

[0037] When the clamp is opened, the device is in the final state when the valve is closed. When the clamp is opened, the drive wheel 16 rotates. Under the action of each guide wheel, the torque is transmitted to the drive wheel a3 and drive wheel b11 through the transmission belt 2. Taking the left side as an example, the drive wheel a3 rotates counterclockwise, and the toothed gear II6 meshing with it rotates clockwise. The rotation of the toothed gear II6 drives the connecting rod 7 connected to it to move, thereby driving the locking tongue 9 to rotate clockwise to open. At this time, the toothed gear I4 is not yet meshed with the drive wheel a3, and the groove on the toothed gear II6 allows the slider on the toothed gear I4 to slide. Therefore, the toothed gear I4 does not rotate, that is, the left and right valves remain closed.

[0038] When the toothed gear II6 has completely finished meshing with the transmission wheel a3, due to the limiting effect of the slide and the slider, it will drive the toothed gear I4 to rotate clockwise until the first tooth on its right side just meshes with the transmission wheel a3. The toothed gear I4 will continue to rotate clockwise under the drive of the transmission wheel a3, which will then drive the left valve 8 connected to its pin shaft to rotate clockwise until it is fully open. The same applies to the right side, so that the right valve 10 is fully opened. At this point, the opening action of the hanging clamp is completed.

Claims

1. An automatic opening and closing clamping mechanism, characterized in that, Includes a housing (1), in which a drive wheel (16) is provided. The drive wheel (16) is connected to a valve shaft a (5) and a valve shaft b (17) respectively through a transmission structure. A left valve (8) is sleeved on the side wall of the valve shaft a (5), and a locking tongue (9) is connected to the left valve (8) at a position away from the valve shaft a (5). A right valve (10) is sleeved on the side wall of the valve shaft b (17), and a locking groove that cooperates with the locking tongue (9) is opened at the end of the right valve (10) away from the valve shaft b (17). The transmission structure includes a transmission wheel a (3) and a transmission wheel b (11), a guide wheel a (12) and a guide wheel b (13), and a guide wheel c (14) and a guide wheel d (15) disposed on both sides of the drive wheel (16) inside the housing (1), wherein the transmission wheel a (3), the guide wheel d (15) and the guide wheel a (12) are on the same side; The transmission wheel a (3) is provided with gear teeth a and pulley teeth a on its side wall. The pulley teeth a are connected to the guide wheel a (12) and the guide wheel d (15). The gear teeth a are meshed with the toothed gear I (4) and toothed gear II (6). The toothed gear I (4) and toothed gear II (6) are sleeved on the side wall of the valve shaft a (5). The toothed gear I (4) has a connecting arm fixed to its smooth edge. The connecting arm has a pin hole vertically opened on its surface. A pin shaft passes through the pin hole and is fixed to the left valve (8). The end face of the missing tooth gear II (6) has a groove a along the circumference of the missing tooth gear II (6). A slider a that can slide relative to the groove a is provided in the groove a. The slider a is fixed to the end face of the missing tooth gear I (4). The end face of the missing tooth gear II (6) is connected to a connecting rod (7) by a pin. The end of the connecting rod (7) away from the missing tooth gear II (6) is connected to a locking tongue (9) by a pin. The groove a is a through groove. The angle of the arc of the groove a on the end face of the missing tooth gear II (6) is equal to the angle of the arc of the tooth of the missing tooth gear II (6).

2. The automatic opening and closing clamping mechanism according to claim 1, characterized in that, The transmission wheel b (11) has gear teeth b and pulley teeth b on its side wall. The pulley teeth b are connected to the guide wheel b (13) and the guide wheel c (14). The gear teeth b are meshed with a toothed gear a (18) and a toothed gear b (19). The toothed gear a (18) and the toothed gear b (19) are sleeved on the side wall of the valve shaft b (17). The toothed gear a (18) has a connecting arm fixed to its smooth edge. The connecting arm has a pin hole vertically opened on its surface. A pin shaft passes through the pin hole and is fixed to the right valve (10).

3. The automatic opening and closing clamping mechanism according to claim 2, characterized in that, The end face of the toothed gear b (19) has a groove b along the circumference of the toothed gear b (19). A slider b that can slide relative to the toothed gear b is provided in the groove b. The slider b is fixed to the end face of the toothed gear a (18). The angle of the arc of the groove b on the end face of the toothed gear b (19) is equal to the angle of the arc of the tooth of the toothed gear b (19).

4. The automatic opening and closing clamping mechanism according to claim 1, characterized in that, The drive wheel (16) is connected in sequence to guide wheel a (12), drive wheel a (3), guide wheel d (15), drive wheel (16), guide wheel b (13), drive wheel b (11) and guide wheel c (14) via a transmission belt (2), and the transmission belt (2) is a closed loop.

5. The automatic opening and closing clamping mechanism according to claim 1, characterized in that, The drive wheel (16) is connected in sequence to guide wheel a (12), drive wheel a (3) and guide wheel d (15) via a transmission belt (2); and the drive wheel (16) is connected in sequence to guide wheel b (13), drive wheel b (11) and guide wheel c (14) via another transmission belt (2), and the transmission belt is a closed loop.

6. The automatic opening and closing clamping mechanism according to claim 4 or 5, characterized in that, The transmission belt (2) is specifically a type of belt, chain, or flexible transmission structure.

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