Adjustable dead brake device of oil pumping unit

Abstract

The utility model relates to the technical field of oil pumping units, in particular to an adjustable dead brake device of an oil pumping unit. The adjustable dead brake device of the oil pumping unit comprises a dead brake hook, the dead brake hook comprises a fixed arm, a hook arm and an adjusting piece, the adjusting piece is located between the fixed arm and the hook arm, the fixed arm and the hook arm are oppositely and fixedly arranged in the circumferential direction, and the fixed arm is provided with a rotary connecting structure used for being rotationally connected with a brake shoe shaft. The hook arm is provided with a clamping hook used for being matched with a brake clamping groove of a brake wheel in a hooking mode, the two ends of the adjusting piece are in threaded connection with the fixed arm and the hook arm through reverse threads respectively, or one end of the adjusting piece is in threaded connection with one of the fixed arm and the hook arm, and the other end of the adjusting piece is rotationally assembled with the other one of the fixed arm and the hook arm. When the dead brake needs to be removed, the telescopic change of the dead brake hook is adjusted according to the meshing condition of the clamping hook and the brake clamping groove, the purpose of loosening the seized dead brake can be achieved, and the dead brake can be safely and rapidly removed without starting a driving motor of the oil pumping unit.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumping units, in particular to an adjustable dead brake device of an oil pumping unit. Background Art

[0002] The oil pump is an important mechanical oil production equipment. When it is shut down for maintenance, it is required to insert the dead brake hook into the dovetail groove of the brake wheel to form a rigid brake to play a role in brake safety protection. The brake is released after the maintenance is completed. However, during use, due to excessive load and other reasons, the dovetail groove is easy to bite the dead brake hook tightly, and the dead brake hook is difficult to remove from the dovetail groove. If the pulley is rotated with a pipe clamp, there will be a great safety risk, especially when the load is large and it cannot be rotated by manpower; if a large mechanical equipment such as a crane is used to lift the oil pump crank, and the input shaft is used to drive the brake wheel to rotate to complete the dead brake release, it will not only increase production costs, but also affect the drilling time of the oil pump; workers climbing onto the reduction box to manually release the dead brake also poses a great safety risk.

[0003] The Chinese utility model patent with the authorization announcement number CN201963262U discloses a walking beam type oil pump dead brake safety removal device, in which one end of the dead brake hook of the device is rotatably mounted on the bracket, and the other end has a trapezoidal head adapted to the dovetail groove of the brake wheel, and there is a 6-7mm movable gap between the trapezoidal head and the dovetail groove in the circumferential direction. A tightening handle is connected to the bracket, and an energy storage spring is connected between the tightening handle and the dead brake hook. When the dead brake needs to be released, the energy storage spring is tightened to keep it in the energy storage state, and then the oil pump drive motor is started. A gap is generated at the moment of starting the drive motor, and the energy storage spring is used to pull the trapezoidal head out of the dovetail groove to release the dead brake. The premise of the application of this device is to accurately judge the rotation direction of the drive motor according to the braking conditions of the dead brake hook and the dovetail groove.

[0004] A Chinese utility model patent with authorization announcement number CN203962785U discloses a dead brake device for an oil pump, in which one end of a brake pin (i.e., a dead brake hook) of the dead brake device is rotatably assembled on a pin shaft, and the pin shaft is fixed on a reduction gearbox of the oil pump, and the other end of the brake pin has a triangular hook that cooperates with a dovetail groove of a brake wheel, and the long side of the triangular hook is an arc shape, and the triangular hook is similar to a ratchet. When the brake wheel rotates forward, the brake pin does not work, and when the brake wheel rotates reversely, the triangular hook is stuck in the dovetail groove, locking and fixing the brake wheel. When the dead brake needs to be released, first determine the rotation direction of the drive motor, and then start the drive motor. The drive motor drives the brake wheel to rotate slightly by a certain angle to push the triangular hook out of the dovetail groove to release the dead brake.

[0005] The above two existing dead brake devices must start the drive motor when releasing the dead brake, and before starting the drive motor, the rotation direction of the drive motor must be accurately determined to achieve the purpose. If the rotation direction is opposite, it is easy to cause the motor to burn or the transmission mechanism to be damaged. Therefore, they do not comply with on-site safety management regulations and cannot be promoted and used on-site. Utility Model Content

[0006] The purpose of the utility model is to provide an adjustable dead brake device for an oil pump to solve the problem that the dead brake device of the existing oil pump must start the drive motor when releasing the dead brake, which is easy to cause the motor to burn out or the transmission mechanism to be damaged due to the wrong rotation direction of the drive motor, does not comply with the on-site safety management regulations, and cannot be promoted and used on-site.

[0007] In order to achieve the above-mentioned purpose, the adjustable dead brake device of the utility model oil pump adopts the following technical solution:

[0008] An adjustable dead brake device for an oil pump comprises a dead brake hook, the dead brake hook comprises a fixed arm, a hook arm and an adjusting piece, the adjusting piece is located between the fixed arm and the hook arm, the fixed arm and the hook arm are relatively fixedly arranged in a circumferential direction, the fixed arm has a rotating connection structure for rotationally connecting to a brake shoe shaft, the hook arm is provided with a hook for hooking and cooperating with a brake slot of a brake wheel, two ends of the adjusting piece are threadedly connected to the fixed arm and the hook arm respectively through reverse threads, or one end of the adjusting piece is threadedly connected to one of the fixed arm and the hook arm, and the other end is rotationally assembled with the other.

[0009] Beneficial effects: The adjustable dead brake device of the utility model is improved on the basis of the existing dead brake device of the oil pumping unit, and is an improved invention. The adjustable dead brake device includes a dead brake hook, and the dead brake hook includes a separately arranged fixed arm, a hook arm and an adjusting member, and the adjusting member is located between the fixed arm and the hook arm. The fixed arm is provided with a rotating connection structure for rotationally connecting with the brake shoe shaft, and the hook arm is provided with a hook for hooking with the brake slot of the brake wheel. When in use, the fixed arm of the dead brake hook is rotationally connected to the brake shoe shaft so that the dead brake hook as a whole can rotate relative to the brake shoe shaft. During the rotation of the dead brake hook, the hook is inserted into the brake slot or pulled out of the brake slot. When braking is required, the hook is inserted into the brake slot. Rigid braking is thereby achieved in the slot, and the hook is pulled out of the brake slot when the brake needs to be released; the fixed arm and the hook arm are relatively fixed in the circumferential direction, and the two ends of the adjusting member are threadedly connected to the fixed arm and the hook arm through reverse threads, or, one end of the adjusting member is threadedly connected to one of the fixed arm and the hook arm, and the other end is rotatably assembled with the other, so that when the adjusting member is rotated forward, the hook arm and the fixed arm can be brought closer to each other, so that the dead brake hook as a whole is relatively shortened; when the adjusting member is rotated reversely, the hook arm and the fixed arm can be moved away from each other, so that the dead brake hook as a whole is relatively extended. When the death brake needs to be released, the need for telescopic adjustment of the death brake hook is determined based on the engagement point of the hook and the brake slot. If the brake slot applies an extrusion pressure to the hook arm away from the brake shoe shaft, the death brake hook needs to be adjusted to be relatively extended as a whole so that the hook arm moves a short distance away from the brake shoe shaft. The hook on the hook arm can get rid of the extrusion constraint of the brake slot and the death brake can be easily released. If the brake slot applies an extrusion pressure to the hook arm toward the brake shoe shaft, the death brake hook needs to be adjusted to be relatively shortened as a whole so that the hook arm moves a short distance toward the brake shoe shaft. The hook on the hook arm can get rid of the extrusion constraint of the brake slot and the death brake can be easily released. When the dead brake needs to be released, the adjustable dead brake device of the oil pump of the present invention adjusts the extension and contraction of the dead brake hook according to the engagement of the hook on the hook arm with the brake groove of the brake wheel, so as to achieve the purpose of loosening the "stuck" dead brake. The dead brake can be released safely and quickly without starting the oil pump drive motor, which directly avoids the safety risks of the dead brake device of the existing oil pump when starting the drive motor, so that it can be promoted and applied on-site in oil fields.

[0010] Furthermore, the anti-rotation sleeve cooperates between the fixed arm and the hook arm to achieve a relatively fixed arrangement in the circumferential direction.

[0011] Furthermore, the adjusting part is an adjusting screw sleeve, and both ends of the adjusting screw sleeve are threadedly connected to the fixed arm and the hook arm through reverse threaded holes respectively. A stop slot is provided at the end of one of the fixed arm and the hook arm, and a stop column is provided at the end of the other. The stop column cooperates with the stop slot sleeve to realize the relative fixed setting of the fixed arm and the hook arm in the circumferential direction.

[0012] Furthermore, the adjustable dead brake device of the oil pump also includes a transmission structure, which has a manual input end and an output end that is transmission-connected to the adjusting member and drives the adjusting member to rotate.

[0013] Furthermore, the transmission structure includes a transmission shaft, which is in transmission connection with the adjusting member, a ratchet wrench is mounted on the transmission shaft, and an extended pull rod is connected to the handle of the ratchet wrench.

[0014] Furthermore, the transmission shaft is perpendicular to the axis of the adjusting member, and the transmission shaft extends horizontally.

[0015] Furthermore, the transmission shaft and the adjusting part are connected through a gear set. The adjustable dead brake device of the oil pump also includes an installation box. The dead brake hook and the gear set are accommodated inside the installation box. The opposite ends of the fixed arm and the hook arm extend from opposite sides of the installation box. The transmission shaft extends from the box wall of the installation box and the ratchet wrench is located outside the installation box.

[0016] Furthermore, one end of the hook arm extending out of the installation box is connected to an operating rod, and the operating rod is transmission-connected to an operating handle, and the operating handle drives the dead brake hook to flip, thereby realizing the hooking and separation of the hook and the brake slot.

[0017] Furthermore, the operating handle and the extended pull rod are located on the same side of the installation box.

[0018] Furthermore, the adjustable dead brake device of the oil pump also includes a mounting box, and the fixed arm and the hook arm are respectively mounted on the box walls on opposite sides of the mounting box to prevent rotation, thereby achieving a relatively fixed arrangement in the circumferential direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded schematic diagram of a dead brake hook in an embodiment of an adjustable dead brake device of a utility model oil pumping unit;

[0020] Figure 2 It is a schematic diagram of the adjustable dead brake device of the utility model oil pumping unit connected to the brake shoe shaft;

[0021] Figure 3 It is a schematic diagram showing that the transmission shaft and the adjusting member are connected through a gear set;

[0022] Figure 4 It is a schematic diagram of the internal structure of the adjustable dead brake device of the utility model oil pumping unit;

[0023] In the figure: 1. fixed arm; 101. shoe shaft connecting hole; 102. anti-rotation slot; 2. hook arm; 201. anti-rotation plug column; 202. hook; 3. adjustment member; 4. adjustment gear; 501. transmission shaft; 502. driving gear; 503. driven gear; 6. ratchet wrench; 7. extension rod; 8. brake shoe shaft; 9. brake wheel; 901. brake slot; 10. installation box; 11. operating rod; 12. operating handle. DETAILED DESCRIPTION

[0024] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0025] The existing dead brake device of the oil pump must start the drive motor when releasing the dead brake. Before starting, the rotation direction of the drive motor must be accurately determined to achieve the purpose. If the rotation direction is opposite, it is easy to cause the motor to burn or the transmission mechanism to be damaged. It does not comply with the on-site safety management regulations and cannot be promoted and used on-site. In order to solve this problem, the utility model proposes an adjustable dead brake device for the oil pump, which can release the dead brake more safely and be promoted and applied on-site.

[0026] The basic scheme principle of the adjustable dead brake device of the oil pumping unit of the utility model is: the adjustable dead brake device of the oil pumping unit includes a dead brake hook, and the dead brake hook is arranged as a plurality of components which are arranged separately, so that the dead brake hook can be extended and retracted, thereby adjusting the position of the hook of the dead brake hook in the brake slot of the brake wheel, and then releasing the squeezing constraint of the brake slot on the hook, so that the dead brake can be easily released, and there is no need to start the drive motor to drive the brake wheel to rotate. Therefore, the safety risks of the dead brake device of the existing oil pumping unit are avoided, and the dead brake can be released more safely and quickly.

[0027] Based on the principle of the above scheme, the following is a detailed description of the embodiment of the adjustable dead brake device of the utility model for the oil pumping unit:

[0028] like Figure 1-2As shown, the adjustable dead brake device of the oil pump includes a dead brake hook, and the dead brake hook includes a fixed arm 1, a hook arm 2 and an adjusting member 3, and the adjusting member 3 is located between the fixed arm 1 and the hook arm 2. The adjusting member 3 is an adjusting screw sleeve, and threaded holes are respectively provided at both ends of the adjusting screw sleeve, and the threaded holes at both ends are reverse threaded holes, and the two ends of the adjusting screw sleeve are respectively threadedly connected with the fixed arm 1 and the hook arm 2 through the reverse threaded holes. The outside of the fixed arm 1 is provided with an external thread section adapted to the threaded hole at one end of the adjusting screw sleeve, and one end of the fixed arm 1 is provided with a rotating connection structure for rotatingly connecting with the brake shoe shaft 8, and the rotating connection structure is specifically a shoe shaft connection hole 101, and the other end of the fixed arm 1 is provided with a rotation-stopping slot 102, and the rotation-stopping slot 102 is a U-shaped slot extending along the axial direction of the fixed arm 1. The hook arm 2 is provided with an external thread section adapted to the threaded hole at the other end of the adjusting screw sleeve on the outside, and a stop plug column 201 is provided at one end of the hook arm 2. The stop plug column 201 is used to cooperate with the stop plug sleeve of the stop slot 102 at the end of the fixed arm 1, so as to realize the relative fixed arrangement of the fixed arm 1 and the hook arm 2 in the circumferential direction, and the hook arm 2 is provided with a hook 202 for hooking and cooperating with the brake slot 901 of the brake wheel 9. The brake slot 901 of the brake wheel 9 is usually a dovetail slot, so the hook 202 of the hook arm 2 is a trapezoidal block adapted to the dovetail slot, and the size of the trapezoidal block is slightly smaller than the size of the dovetail slot, so that there is a movable gap between the trapezoidal block and the dovetail slot, so as to ensure that the trapezoidal block can pass smoothly in and out. Since the two ends of the adjusting screw sleeve are respectively threadedly connected with the fixed arm 1 and the hook arm 2 through reverse threaded holes, and the stop plug sleeve between the fixed arm 1 and the hook arm 2 cooperates, the hook arm 2 and the fixed arm 1 can move closer or farther from each other when the adjusting screw sleeve is rotated, so that the dead brake hook can be telescopically changed as a whole. By adjusting the overall extension and contraction of the dead brake hook, the position of the hook 202 in the brake slot 901 can be adjusted, so that the hook 202 can be freed from the squeezing constraint of the brake slot 901, and the hook 202 can be smoothly pulled out of the brake slot 901 to release the dead brake.

[0029] like Figure 2As shown in , the adjustable dead brake device of the oil pumping unit also includes a transmission structure, which has a manual input end and an output end that is transmission-connected to the adjusting member 3 and drives it to rotate. By setting the transmission structure, the operator applies force to the transmission structure, and the power can be transmitted to the adjusting member 3 through the transmission structure to drive the adjusting member 3 to rotate, so that the operator can stand at a distance to operate, and the operation is more convenient and safer. Specifically, the transmission structure includes a transmission shaft 501, which is transmission-connected to the adjusting member 3, and a ratchet wrench 6 is mounted on the transmission shaft 501, and an extension rod 7 is connected to the handle of the ratchet wrench 6. The transmission shaft 501 is driven to rotate by the ratchet wrench 6, so that there is no need to turn the hand back and forth during operation, and the operation is more convenient. At the same time, by connecting the extension rod 7 to the handle of the ratchet wrench 6, it is convenient for the operator to apply force to the ratchet wrench 6 from a distance, and the operator does not need to climb onto the reduction box of the oil pumping unit to apply force to the ratchet wrench 6, and the operation is more convenient and safer. The ratchet wrench 6 is a mature existing technology. A common plum blossom ratchet wrench 6 can be used. By turning the plum blossom ratchet wrench 6 over and using it, the transmission shaft 501 can be driven to rotate in the opposite direction. A two-way plum blossom ratchet wrench 6 can also be used. By twisting the toggle switch to change the position of the pawl, the transmission shaft 501 can be driven to rotate in the forward and reverse directions.

[0030] Preferably, the transmission shaft 501 is perpendicular to the axis of the adjusting member 3, and the transmission shaft 501 extends horizontally. Figure 2 From the perspective of the adjustment member 3, the axis of the adjustment member 3 extends horizontally to the left and right, and the transmission shaft 501 extends horizontally to the front and back. Figure 2 From the top view, it can be seen that the transmission shaft 501 and the adjusting member 3 or the transmission shaft 501 and the dead brake hook are arranged in a cross shape as a whole. The advantage of such an arrangement is that the transmission shaft 501 and the fixed arm 1 and the hook arm 2 are staggered in space, so as to avoid the fixed arm 1 and the hook arm 2 interfering with the rotation of the ratchet wrench 6 mounted on the transmission shaft 501, and the force application operation is more convenient.

[0031] like Figure 3-4 As shown in , the transmission shaft 501 is connected to the adjusting member 3 through a gear set, and the gear set includes a driving gear 502 fixedly mounted on the transmission shaft 501 and a driven gear 503 meshing with the driving gear 502, the driving gear 502 is a bevel gear, and the bevel gear portion of the driven gear 503 is vertically meshed with the driving gear 502, and the rotation axis of the driven gear 503 is parallel to the axis of the adjusting member 3, and an adjusting gear 4 is fixed to the outside of the adjusting member 3, and the adjusting gear 4 is meshed with the spur gear portion of the driven gear 503. The transmission shaft 501 and the adjusting member 3 are connected through the gear set, which can make the transmission structure more compact and the transmission more stable. Of course, in other embodiments, the transmission shaft 501 and the adjusting member 3 can also be connected through a worm gear mechanism.

[0032] like Figure 2-4As shown, the adjustable dead brake device of the oil pump also includes an installation box 10, the dead brake hook and the gear set are all contained inside the installation box 10, the opposite ends of the fixed arm 1 and the hook arm 2 extend from the opposite sides of the installation box 10, the transmission shaft 501 extends from the box wall of the installation box 10, and the ratchet wrench 6 is outside the installation box 10. The installation box 10 covers most of the structures of the gear set and the dead brake hook, isolating them from the external environment, which can better prevent impurities and oil stains from adhering to the gear surface and the connection part of the dead brake hook, thereby improving the transmission stability, making the operation more labor-saving, and extending the service life of the device. Of course, in actual application, it is also possible not to set up a closed installation box 10, but to set up a bracket, and install the gear set and the fixed arm 1 and hook arm 2 of the dead brake hook on the bracket. At this time, the gear set, the fixed arm 1 and the hook arm 2 are all in the open air state, and regular inspection and maintenance are sufficient.

[0033] like Figure 2 As shown in the figure, the end of the hook arm 2 extending out of the installation box 10 is connected to the operating rod 11, and the operating rod 11 is connected to the operating handle 12 in a transmission manner. The dead brake hook is driven to flip through the operating handle 12 to achieve the hooking and separation of the hook 202 and the brake slot 901. The operator can drive the dead brake hook to flip through the operating handle 12 at a distance, which is more convenient. When braking is required, the dead brake hook is flipped downward to make the hook 202 snap into the brake slot 901 to form a rigid brake; when the brake needs to be released, the dead brake hook is flipped upward to pull the hook 202 out of the brake slot 901. More optimally, the operating handle 12 and the extended rod 7 are located on the same side of the installation box 10, so that the operator can operate the operating handle 12 and the extended rod 7 at the same side of the installation box 10 at the same time. When pulling the extended rod 7 to adjust the extension and retraction of the dead brake hook, try to apply force to the operating handle 12 until the hook 202 is pulled out of the brake slot 901. Only one operator is needed to operate the extended rod 7 and the operating handle 12 at the same time, which makes the operation more convenient.

[0034] The adjustable dead brake device of the utility model oil pump is adjusted according to the actual situation during application, as follows:

[0035] For reference Figure 2When braking is needed, the hook 202 of the dead brake hook is inserted into the brake slot 901 of the brake wheel 9 to achieve rigid braking; when the dead brake needs to be released, the telescopic adjustment requirement of the dead brake hook is judged according to the engagement point of the hook 202 and the brake slot 901. If the brake slot 901 applies an extrusion force to the hook 202 away from the brake shoe shaft 8, it is necessary to adjust the overall relative extension of the dead brake hook so that the hook arm 2 moves a short distance away from the brake shoe shaft 8, and the hook 202 on the hook arm 2 can get rid of the extrusion constraint of the brake slot 901, and the dead brake can be easily released. If the brake slot 901 applies an extrusion force to the hook 202 toward the brake shoe shaft 8, it is necessary to adjust the overall relative shortening of the dead brake hook so that the hook arm 2 moves a short distance toward the brake shoe shaft 8, and the hook 202 on the hook arm 2 can get rid of the extrusion constraint of the brake slot 901, and the dead brake can be easily released.

[0036] When the dead brake needs to be released, the adjustable dead brake device of the oil pump of the utility model can adjust the extension and contraction of the dead brake hook according to the engagement of the hook 202 of the dead brake hook with the brake groove 901 of the brake wheel 9, so as to achieve the purpose of loosening the "bitten" dead brake. The operator can perform manual operation at a distance to release the dead brake safely and quickly without starting the oil pump drive motor, which directly avoids the safety risks of the existing oil pump dead brake device when starting the drive motor and can be promoted and applied on-site in oil fields.

[0037] In the above embodiment, the two ends of the adjusting member are respectively threadedly connected with the fixed arm and the hook arm through reverse threads, so that when the adjusting member is rotated, the adjusting member will make a linear displacement relative to the fixed arm, and the hook arm will also make a linear displacement relative to the adjusting member. The overall extension or shortening length of the dead brake hook is the sum of the linear displacement of the adjusting member and the linear displacement of the hook arm. For every rotation of the adjusting member, the length of the dead brake hook changes by two pitches, and the adjustment process is faster and the adjustment efficiency is higher. In other embodiments, one end of the adjusting member can be threadedly connected to one of the fixed arm and the hook arm, and the other end can be rotatably assembled with the other. In this case, for every rotation of the adjusting member, the length of the dead brake hook changes by one pitch, and the telescopic adjustment of the dead brake hook can also be achieved.

[0038] In the above embodiment, a rotation-stopping slot is provided at one end of the fixed arm, a rotation-stopping plug column is provided at one end of the hook arm, and the rotation-stopping plug column and the rotation-stopping slot plug sleeve cooperate to achieve the relative fixed arrangement of the fixed arm and the hook arm in the circumferential direction. Of course, in other embodiments, a rotation-stopping plug column may be provided at one end of the fixed arm, a rotation-stopping slot is provided at one end of the hook arm, and the rotation-stopping plug column and the rotation-stopping slot plug sleeve cooperate to achieve the relative fixed arrangement of the fixed arm and the hook arm in the circumferential direction. In addition, the rotation-stopping plug sleeve matching structure may not be provided on the fixed arm and the hook arm, and the fixed arm and the hook arm may be respectively rotation-stopped and assembled on the box walls on the opposite sides of the installation box to achieve the relative fixed arrangement of the fixed arm and the hook arm in the circumferential direction.

[0039] In the above embodiment, the adjusting member is an adjusting screw sleeve, and the two ends of the adjusting screw sleeve are respectively threadedly connected to the fixed arm and the hook arm through reverse threaded holes. In other embodiments, the adjusting member may also be an adjusting screw rod, and the two ends of the adjusting screw rod are respectively threadedly connected to the fixed arm and the hook arm through reverse threads. In this case, a connecting rod may be connected between the fixed arm and the hook arm, and a long hole extending along the axis of the hook arm is provided on the hook arm. When the hook arm moves, one end of the connecting rod may slide in the long hole, and the fixed arm and the hook arm are relatively fixed in the circumferential direction through the connecting rod.

[0040] In the above embodiment, the adjustable dead brake device of the oil pumping unit further includes a transmission structure, which has a manual input end and an output end that is transmission-connected to the adjusting member and drives the adjusting member to rotate, and the power is transmitted to the adjusting member through the transmission structure to drive the adjusting member to rotate. In other embodiments, the transmission structure may not be provided, and the operator may directly clamp the adjusting member with a pipe clamp to rotate the adjusting member.

[0041] In the above embodiment, the transmission shaft is connected to the adjusting member, a ratchet wrench is mounted on the transmission shaft, and an extended pull rod is connected to the handle of the ratchet wrench, so that the operator can operate the extended pull rod at a distance, thereby driving the adjusting member to rotate, which is very convenient. In other embodiments, the extended pull rod may not be provided, and the operator may climb onto the reduction box of the pumping unit to operate the ratchet wrench; or an ordinary plum wrench may be mounted on the transmission shaft to rotate the transmission shaft.

[0042] In the above embodiment, the transmission shaft extends horizontally and is perpendicular to the axis of the adjusting member, so that the transmission shaft and the ratchet wrench mounted on the transmission shaft can avoid the fixed arm and the hook arm, avoiding the fixed arm and the hook arm from interfering with the rotation of the transmission shaft and the ratchet wrench, making the operation more convenient. Of course, in other embodiments, the transmission shaft can also be parallel to the axis of the adjusting member, in which case the transmission shaft can be extended longer outside the installation box, and the ratchet wrench can be mounted on the extended portion of the transmission shaft, so that the ratchet wrench is farther away from the fixed arm or the hook arm to avoid interference.

[0043] In the above embodiment, the operating handle and the extension rod are on the same side of the installation box, so that the operator can operate the operating handle and the extension rod at the same side of the installation box, which is more convenient. Of course, in other embodiments, the operating handle and the extension rod can also be on different sides of the installation box, in which case two people can operate together.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable dead brake device for an oil pump, comprising a dead brake hook, characterized in that: The dead brake hook includes a fixed arm, a hook arm and an adjusting piece. The adjusting piece is located between the fixed arm and the hook arm. The fixed arm and the hook arm are relatively fixed in the circumferential direction. The fixed arm has a rotating connection structure for rotationally connecting to the brake shoe shaft. The hook arm is provided with a hook for hooking and cooperating with the brake slot of the brake wheel. Both ends of the adjusting piece are threadedly connected to the fixed arm and the hook arm through reverse threads, respectively. Alternatively, one end of the adjusting piece is threadedly connected to one of the fixed arm and the hook arm, and the other end is rotationally assembled with the other.

2. The adjustable dead brake device of the oil pumping unit according to claim 1, characterized in that: The anti-rotation sleeve cooperates between the fixed arm and the hook arm to achieve a relatively fixed arrangement in the circumferential direction.

3. The adjustable dead brake device of the oil pumping unit according to claim 2, characterized in that: The adjusting part is an adjusting screw sleeve, and the two ends of the adjusting screw sleeve are threadedly connected to the fixed arm and the hook arm through reverse threaded holes respectively. A stop slot is provided at the end of one of the fixed arm and the hook arm, and a stop column is provided at the end of the other. The stop column cooperates with the stop slot sleeve to realize the relative fixed setting of the fixed arm and the hook arm in the circumferential direction.

4. The adjustable dead brake device of the oil pumping unit according to any one of claims 1 to 3, characterized in that: The adjustable dead brake device of the oil pump also includes a transmission structure, which has a manual input end and an output end which is transmission-connected with the adjusting member and drives the adjusting member to rotate.

5. The adjustable dead brake device of the oil pumping unit according to claim 4, characterized in that: The transmission structure comprises a transmission shaft, which is in transmission connection with the adjusting member, a ratchet wrench is sleeved on the transmission shaft, and an extended pull rod is connected to the handle of the ratchet wrench.

6. The adjustable dead brake device of the oil pumping unit according to claim 5, characterized in that: The transmission shaft is perpendicular to the axis of the adjusting member, and the transmission shaft extends horizontally.

7. The adjustable dead brake device of the oil pumping unit according to claim 6, characterized in that: The transmission shaft and the adjusting part are connected through a gear set. The adjustable dead brake device of the oil pump also includes an installation box. The dead brake hook and the gear set are accommodated inside the installation box. The opposite ends of the fixed arm and the hook arm extend from the opposite sides of the installation box. The transmission shaft extends from the box wall of the installation box and the ratchet wrench is located outside the installation box.

8. The adjustable dead brake device of the oil pumping unit according to claim 7, characterized in that: One end of the hook arm extending out of the installation box is connected with an operating rod, and the operating rod is transmission-connected with an operating handle, and the dead brake hook is driven to flip through the operating handle to achieve hooking and separation of the hook and the brake slot.

9. The adjustable dead brake device of the oil pumping unit according to claim 8, characterized in that: The operating handle and the extended pull rod are on the same side of the installation box.

10. The adjustable dead brake device of the oil pumping unit according to claim 1, characterized in that: The adjustable dead brake device of the oil pump also includes a mounting box, and the fixed arm and the hook arm are respectively fixedly mounted on the box walls on opposite sides of the mounting box to achieve a relatively fixed arrangement in the circumferential direction.

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