A hand and foot brake device and method

Abstract

The application relates to a hand-automatic brake device and method, and the hand-automatic brake device comprises a manual brake system which is composed of a pumping unit brake handle, a connecting fork head, a first pull rod, an adjusting rod, a second pull rod, a first telescopic cylinder and a third pull rod which are sequentially connected; and an automatic brake system which is composed of a supporting base, an executing mechanism, a push rod, a brake spring, a spring pull rod, a suction plate, a connecting rod, an electromagnet, an electromagnet mounting cylinder, a second telescopic cylinder and a fourth pull rod which are sequentially connected. The two sets of linkage brake mechanisms and the operation method thereof realize pumping unit hand-automatic brake; the electromagnetic locking brake position is adopted, automatic brake is realized when power is lost, the on-site safety is ensured, the spring is adopted as brake power, the problem of insufficient automatic brake force caused by brake pad wear can be effectively solved, the automatic brake is safer, the brake connecting rod is designed as a telescopic cylinder, the two sets of manual brake and automatic brake systems independently operate and do not interfere with each other, and the flexibility is high.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of brake of pumping unit for oil exploitation, more particularly to a kind of brake device and method of hand self. BACKGROUND

[0002] Pumping unit is widely used in oil field due to its reasonable structure, stable operation, large carrying capacity, long service life and other advantages. At present, the pumping unit uses manual brake, which is pulled by manual brake handle, and the brake disc is driven by connecting rod mechanism to realize the locking of brake wheel, so as to complete the brake of pumping unit. During operation, the operator may forget to brake after stopping, or the remote stop or power failure occurs, at which time the load in the well changes easily, causing the movement of the balance block of the pumping unit and causing safety accidents.

[0003] The patent with application number 201920560836.5 discloses an automatic brake device for pumping unit, which comprises a pumping unit base, a brake base connected to the pumping unit base through a fixed base, and a brake control cabinet provided on the brake base. A manual brake device is provided on the fixed base. A partition is provided in the brake control cabinet, and a power module and a PLC controller are provided above the partition. A servo motor is provided below the partition, and the servo motor and the power module are connected to the PLC controller. The extension shaft of the electric push rod is connected to the servo motor, and the extension shaft of the electric push rod is connected to one end of the pull rod assembly through a pin shaft. The other end of the pull rod assembly is connected to the pumping unit brake crank. A pin hole is provided in the pull rod assembly. The automatic brake is realized by pulling the pull rod with the electric push rod. When the manual brake mechanism is needed, the connection parts of the automatic brake need to be manually removed on site, and the manual brake mechanism is connected, so that the manual brake can be realized. The manual brake and the automatic brake cannot be integrated, and need to be switched on site.

[0004] The patent with application number 202020469943.X directly connects the automatic push rod to the manual brake connecting rod to realize automatic brake. The existing pumping unit brake disc separates the brake disc and the brake hub under the action of spring force, and releases the brake. Due to the limited installation space of the spring, the restoring force of the spring is small. Both ends of the electric push rod are connected to the connecting rod through hinge connection. Under the action of gravity, the electric push rod is easy to pull the connecting rod to move. The weight of the electric push rod is at least tens of kilograms. The spring force cannot bear such a large load. When the pumping unit is running, the brake disc will continue to wear, affecting the normal operation of the pumping unit.

[0005] Therefore, in order to improve the safety and reliability of the pumping unit brake, a hand self brake device is invented. SUMMARY

[0006] Invention purposes: In order to overcome the above-mentioned defects of the prior art, the present application provides a kind of hand self brake device and method.The device is equipped with a set of automatic brake system on the basis of original pumping unit manual brake, can realize the manual and automatic brake of pumping unit.Manual brake function does not change, by pulling brake handle artificially controlled brake.Automatic brake adopts the mode of power failure brake, when pumping unit stops or power grid is powered off, automatic brake can be started, avoid the safety accident caused by not timely found by people, make up the shortcoming of manual brake not timely.Hand and automatic brake are relatively independent, can complete brake function independently, do not affect each other, and make up for each other's shortcomings, complement each other.

[0007] Technical scheme: A kind of hand self brake device, comprising:

[0008] Manual brake system, which is composed of pumping unit brake handle, connecting fork head, first pull rod, adjusting rod, second pull rod, first telescopic cylinder and third pull rod connected in sequence,

[0009] Automatic brake system, which is composed of support base, actuator, push rod, brake spring, spring pull rod, suction plate, connecting rod, electromagnet, electromagnet mounting cylinder, second telescopic cylinder and fourth pull rod connected in sequence.

[0010] As a preferred scheme of a kind of hand self brake device in the present application: first telescopic cylinder is circular, and the upper and lower ends are designed with connecting threads, and the upper end is equipped with a gland with a through hole.

[0011] As a preferred scheme of a kind of hand self brake device in the present application: first telescopic cylinder and second pull rod are connected in rigidity, and first telescopic cylinder and third pull rod are connected in sliding sleeve mode.

[0012] As a preferred scheme of a kind of hand self brake device in the present application: third pull rod has a stepped ladder, and the diameter of the lower pull rod of the ladder is greater than the diameter of the gland through hole and less than the inner diameter of the telescopic cylinder, and the diameter of the upper pull rod of the ladder is less than the diameter of the gland through hole.

[0013] As a preferred scheme of a kind of hand self brake device in the present application: support base is fixed on pumping unit base.

[0014] As a preferred scheme of a kind of hand self brake device in the present application: actuator and support base are connected in fixed mode or hinged mode.Further, the hinged mode is provided with a limiting mechanism to avoid large swing of actuator.

[0015] As a preferred scheme of a kind of hand self brake device in the present application: actuator is a linear motion execution component, and more preferably an electric or hydraulic execution component.

[0016] As a preferred scheme of the hand self brake device, the brake spring is a compression spring, which is sleeved on the spring pull rod, the upper end of the spring pull rod extends into the electromagnet mounting cylinder, and the upper end is connected with a suction plate, the suction plate can be attracted to the electromagnet after moving upward, and the connection rod is connected to the suction plate.

[0017] As a preferred scheme of the hand self brake device, the buffer spring is arranged between the electromagnet and the electromagnet mounting cylinder, which can buffer the impact force when the suction plate is attracted.

[0018] As a preferred scheme of the hand self brake device, the second telescopic cylinder is connected with the connection rod and the fourth pull rod at both ends, the structure and function of the second telescopic cylinder are the same as those of the first telescopic cylinder, the connection between the second telescopic cylinder and the connection rod is rigid, the movement of the second telescopic cylinder can be driven when the connection rod moves, the structure of the end of the connection rod connected with the second telescopic cylinder is the same as that of the end of the second pull rod, and the fourth pull rod is connected with the second telescopic cylinder in a sliding sleeve mode, the fourth pull rod can move in the second telescopic cylinder, and the structure and function of the fourth pull rod are the same as those of the third pull rod. When the pumping unit operates normally, the fourth pull rod is located at the uppermost end of the second telescopic cylinder.

[0019] The method for performing hand self brake by using the hand self brake device includes two methods of manual brake and automatic brake.

[0020] The method for performing manual brake includes the following steps.

[0021] (1) When the pumping unit is manually braked, the pulling force is transmitted to the pull rod cam through the connecting fork, the first pull rod, the adjusting rod, the second pull rod, the first telescopic cylinder and the third pull rod in sequence by pulling the pumping unit brake handle, the second pull rod drives the first telescopic cylinder to move downward, and the first telescopic cylinder drives the pull rod to move downward, so that the pull rod cam completes the brake action.

[0022] (2) When the manual brake is released, the connecting fork, the first pull rod, the adjusting rod, the second pull rod and the first telescopic cylinder move upward to the initial state as the pumping unit brake handle is released, the upward movement of the first telescopic cylinder causes the third pull rod to enter the first telescopic cylinder, the pulling force disappears, and the third pull rod moves upward under the action of the brake return spring.

[0023] The method for performing automatic brake includes the following steps.

[0024] (1) When the pumping unit is stopped or the power grid is powered off, the magnetic force of the electromagnet disappears due to power loss, the attracted plate attracted by the electromagnet is released, at this time, the spring pull rod connected with the attracted plate starts to descend under the elastic action of the compressed brake spring, and drives the attracted plate, the connecting rod and the second telescopic cylinder to descend together, since the fourth pull rod is at the uppermost end of the second telescopic cylinder at this time, the descent of the second telescopic cylinder will drive the pull rod to descend, thereby pulling the pull rod cam and driving the brake pad to stop the brake wheel to complete the brake action.

[0025] (2) When the automatic brake is powered on, the actuator pushes the push rod to ascend from the initial position 1, compresses the brake spring and pushes the spring pull rod and the attracted plate to ascend, the attracted plate is magnetically attracted and locked by the electromagnetic force of the electromagnet when the attracted plate is attached to the electromagnet, at this time, the push rod ascends to position 2, and then the push rod descends to reset to the initial position 1, the connecting rod ascends to the maximum displacement together with the attracted plate, and the connecting rod drives the second telescopic cylinder to ascend to the maximum displacement, at this time, the fourth pull rod ascends to reset under the action of the brake reset spring.

[0026] Beneficial effects: The hand-automatic brake device and method disclosed by the application has the following beneficial effects:

[0027] (1) The two sets of linkage brake mechanisms and the operation method thereof are used to realize the hand-automatic brake of the pumping unit;

[0028] (2) The electromagnetic locking brake position is used, the automatic brake is realized when the power is lost, and the safety on site is ensured;

[0029] (3) The spring is used as the brake power, the problem of insufficient automatic brake force caused by brake pad wear can be effectively solved, and the automatic brake is safer;

[0030] (4) The brake connecting rod is designed as a telescopic cylinder, the two sets of hand-automatic brake systems independently operate and do not interfere with each other, and the flexibility is high. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structure schematic view of the hand-automatic brake device of the application;

[0032] Figure 2 It is an installation schematic view of the application;

[0033] Figure 3 It is a telescopic cylinder structure schematic view of the hand-automatic brake device of the application;

[0034] Figure 4 It is a schematic view of the movement position of the push rod of the application;

[0035] Among them:

[0036] 1 - pumping unit brake handle 2 - connecting fork head

[0037] 3 - first pull rod 4 - adjusting rod

[0038] 5—Second pull rod; 6—First telescopic cylinder

[0039] 7—Third pull rod; 8—Support base

[0040] 9—Actuator 10—Push Rod

[0041] 11—Brake spring 12—Spring rod

[0042] 13—Suction plate 14—Connecting rod

[0043] 15—Electromagnet 16—Electromagnet mounting cylinder

[0044] 17—Second telescopic cylinder; 18—Fourth pull rod

[0045] 19—Pulley Cam 20—Brake Pad

[0046] 21—Brake wheel 22—Brake return spring Detailed Implementation

[0047] The specific embodiments of the present invention are described in detail below.

[0048] like Figures 1-4 As shown, the present invention provides a manual / automatic braking device, comprising:

[0049] Manual braking system,

[0050] The manual braking system consists of a pumping unit brake handle 1, a connecting fork 2, a first lever 3, an adjusting rod 4, a second lever 5, a first telescopic cylinder 6, and a third lever 7 connected in sequence.

[0051] Automatic braking system,

[0052] The automatic braking system consists of a support base 8, an actuator 9, a push rod 10, a brake spring 11, a spring pull rod 12, a suction plate 13, a connecting rod 14, an electromagnet 15, an electromagnet mounting cylinder 16, a second telescopic cylinder 17, and a fourth pull rod 18 connected in sequence.

[0053] Furthermore, the first telescopic cylinder 6 is annular, with connecting threads at both ends, and a pressure cap with a through hole at the upper end. The first telescopic cylinder 6 is rigidly connected to the second pull rod 5. When the second pull rod 5 moves, it can drive the first telescopic cylinder 6 to move. The first telescopic cylinder 6 is connected to the third pull rod 7 by a sliding sleeve, and the third pull rod 7 can move inside the first telescopic cylinder 6. When the pumping unit is operating normally, the third pull rod 7 is at the uppermost end of the first telescopic cylinder 6.

[0054] Further, the third pull rod 7 has a stepped section, the lower section of the stepped section has a diameter larger than the diameter of the through hole of the cover and smaller than the inner diameter of the telescopic cylinder, the upper section of the stepped section has a diameter smaller than the diameter of the through hole of the cover, and the support base 8 is fixed on the pumping unit base

[0055] Further, the actuator 9 is fixedly connected or hingedly connected with the support base 8. Further, the hinge is provided with a limiting mechanism to avoid large swing of the actuator 9. The actuator 9 is a linear motion actuator, preferably an electric or hydraulic actuator, and the actuator 9 is used to drive the push rod 10 to move up and down.

[0056] Further, the brake spring 11 is a compression spring, which is sleeved on the spring pull rod 12, the upper end of the spring pull rod 12 extends into the mounting cylinder of the electromagnet 16, and the upper end of the spring pull rod 12 is connected with the suction plate 13, the suction plate 13 can be attracted to the electromagnet 15 when the suction plate 13 moves up, and the suction plate 13 is connected with the connecting rod 14.

[0057] Further, the electromagnet 15 and the electromagnet 16 are provided with a buffer spring between the mounting cylinder of the electromagnet 15 and the mounting cylinder of the electromagnet 16, which can buffer the impact force when the suction plate 13 is attracted.

[0058] The second telescopic cylinder 17 is connected with the connecting rod 14 and the fourth pull rod 18 at both ends, respectively, and the structure and function of the second telescopic cylinder 17 are the same as those of the first telescopic cylinder 6. The second telescopic cylinder 17 is hard connected with the connecting rod 14, and the second telescopic cylinder 17 can be driven to move when the connecting rod 14 moves. The structure of the connecting rod 14 and the connecting end of the second telescopic cylinder 17 is the same as that of the second pull rod 5. The fourth pull rod 18 is connected with the second telescopic cylinder 17 in a sliding sleeve mode, and the fourth pull rod 18 can move in the second telescopic cylinder 17. The structure and function of the fourth pull rod 18 are the same as those of the third pull rod 7. When the pumping unit normally operates, the fourth pull rod 18 is located at the uppermost end of the second telescopic cylinder 17.

[0059] As shown in Figures 1-4 The present application provides a kind of hand self brake method, utilize the hand self brake device of described two methods, including manual brake and automatic brake.

[0060] The method of manual brake includes the following steps:

[0061] (1) when manual brake, by pulling pumping unit brake handle 1, the pulling force is sequentially transmitted to pull rod cam 19 through connecting fork head 2, first pull rod 3, adjusting rod 4, second pull rod 5, first telescopic cylinder 6, third pull rod 7, second pull rod 5 drives first telescopic cylinder 6 to descend, since third pull rod 7 is located at the uppermost end of first telescopic cylinder 6, the descending of first telescopic cylinder 6 drives third pull rod 7 to descend, thereby driving pull rod cam 19 to complete brake action.

[0062] (2) When the manual brake is released, with the release of the pumping unit brake handle 1, the connecting fork 2, the first pull rod 3, the adjusting rod 4, the second pull rod 5 and the first telescopic cylinder 6 go up to the initial state, the upstroke of the first telescopic cylinder 6 causes the third pull rod 7 to enter the first telescopic cylinder 6, and the tension disappears, and the third pull rod 7 goes up and resets under the action of the brake reset spring 22.

[0063] When the manual brake is started, the pull rod cam 19 is driven to cause the fourth pull rod 18 to go down, and since the fourth pull rod 18 is at the uppermost end of the second telescopic cylinder 17, the fourth pull rod 18 will go down and move into the second telescopic cylinder 17 at this time, without driving other parts of the automatic brake system, thereby ensuring that the manual brake action does not affect the automatic brake system. The length of the second telescopic cylinder 17 is greater than the maximum stroke of the fourth pull rod 18 moving in the second telescopic cylinder 17.

[0064] After the manual brake action is completed, the automatic brake can still continue to act. Since the action of the manual brake causes the fourth pull rod 18 to go down and move into the second telescopic cylinder 17, at this time, after starting the automatic brake, the pull plate 13, the connecting rod 14 and the second telescopic cylinder 17 are driven to go down to complete the stroke of the fourth pull rod 18 in the second telescopic cylinder 17, and then the tension is transmitted to the fourth pull rod 18, thereby locking the pull rod cam 19 and completing the automatic brake operation.

[0065] The method of the automatic brake comprises the following steps:

[0066] (1) When the pumping unit is stopped or the power grid is powered off, the magnetic force of the electromagnet 15 disappears due to power loss, and the pull plate 13 attracted by the electromagnet is released, at this time, the spring pull rod 12 connected with the pull plate 13 starts to go down under the elastic action of the compressed brake spring 11, and drives the pull plate 13, the connecting rod 14 and the second telescopic cylinder 17 to go down together, since the fourth pull rod 18 is at the uppermost end of the second telescopic cylinder 17 at this time, the downstroke of the second telescopic cylinder 17 will drive the fourth pull rod 18 to go down, thereby pulling the pull rod cam 19 and stopping the brake disc 20 to complete the brake action. After the brake spring 11 is released and elongated, it is ensured that the spring force is greater than the minimum brake force. After the brake spring 11 completes the brake, the brake spring support plate is still a distance away from the push rod 10, ensuring that there is enough brake force.

[0067] (2) When the automatic brake is powered on, the actuator 9 pushes the push rod 10 to go up from the initial position 1( Figure 4 -(1)) and compresses the brake spring 11 and pushes the spring pull rod 12 and the pull plate 13 to go up, and when the pull plate 13 is attached to the electromagnet 15, it is magnetically attracted and locked by the electromagnetic force of the electromagnet at this time, and the push rod 10 goes up to position 2( Figure 4 -(2)), and then the push rod 10 goes down and resets to the initial position 1( Figure 4-(3)), the connecting rod 14 goes up to the maximum displacement along with the suction plate 13, and the connecting rod 14 drives the second telescopic cylinder 17 to go up to the maximum displacement, at this time, the fourth pull rod 18 goes up to reset under the action of the brake reset spring 22, at this time, the fourth pull rod 18 is at the uppermost end of the second telescopic cylinder 17.

[0068] When the automatic brake is started, the pull rod cam 19 is driven to cause the third pull rod 7 to go down, since the third pull rod 7 is at the uppermost end of the first telescopic cylinder 6, at this time, the third pull rod 7 will go down to move into the first telescopic cylinder 6, and will not drive other components of the manual brake system, so as to ensure that the automatic brake action does not affect the manual brake system. The length of the first telescopic cylinder 6 is greater than the maximum stroke of the third pull rod 7 in the first telescopic cylinder 6.

[0069] After the automatic brake action is completed, the manual brake can still continue to act. Since the action of the automatic brake causes the third pull rod 7 to go down to move into the first telescopic cylinder 6, at this time, after the connecting fork 2, the first pull rod 3, the adjusting rod 4, the second pull rod 5 and the first telescopic cylinder 6 are pulled down to complete the stroke of the third pull rod 7 in the first telescopic cylinder 6, the pulling force can be transmitted to the third pull rod 7, so as to lock the pull rod cam 19 and complete the manual brake operation.

[0070] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] The preferred embodiments of the present application are described above in detail, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. A brake device of the type having both manual and automatic operation, characterized in that, The utility model relates to a kind of oil pumping unit brake system, including: Manual brake system, which is composed of oil pumping unit brake handle, connecting fork head, first pull rod, adjusting rod, second pull rod, first telescopic cylinder and third pull rod connected in turn, Automatic brake system, which is composed of support base, actuator, push rod, brake spring, spring pull rod, suction plate, connecting rod, electromagnet, electromagnet mounting cylinder, second telescopic cylinder and fourth pull rod connected in turn; The first telescopic cylinder is circular, and the upper and lower ends are designed with connecting threads, and the upper end is equipped with a gland with a through hole; The first telescopic cylinder and the second pull rod are hard connected, the first telescopic cylinder and the third pull rod are connected in a sliding sleeve manner, and the third pull rod can move in the first telescopic cylinder; The third pull rod has a stepped ladder, and the diameter of the lower pull rod is larger than the diameter of the gland through hole and smaller than the inner diameter of the telescopic cylinder, and the diameter of the upper pull rod is smaller than the diameter of the gland through hole; The brake spring is a compression spring, which is sleeved on the spring pull rod, and the upper end of the spring pull rod extends into the electromagnet mounting cylinder and is connected with the suction plate at the top end, and the suction plate can be attracted to the electrified electromagnet after moving upward, and the connecting rod is connected to the suction plate; A buffer spring is arranged between the electromagnet and the electromagnet mounting cylinder to buffer the impact force when the suction plate is attracted; The second telescopic cylinder is circular, and the upper and lower ends are designed with connecting threads, and the upper end is equipped with a gland with a through hole; The two ends of the second telescopic cylinder are connected with the connecting rod and the fourth pull rod respectively; The second telescopic cylinder and the connecting rod are hard connected, and the movement of the second telescopic cylinder can be driven when the connecting rod moves; The fourth pull rod and the second telescopic cylinder are connected in a sliding sleeve manner, and the fourth pull rod can move in the second telescopic cylinder; 2. A power assisted brake device as claimed in claim 1, wherein: The support base is fixed on the oil pumping unit base.

3. A power assisted brake device as claimed in claim 1, wherein: The actuator and the support base are fixedly connected or hinged.

4. A power assisted brake device as claimed in claim 3, wherein: The hinge is provided with a limiting mechanism to prevent the actuator from swinging greatly.

5. A power assisted brake device as claimed in claim 3, wherein: The actuator is a straight-line moving execution component.

6. A power assisted brake device as claimed in claim 5, wherein: The actuator is an electric or hydraulic execution component.

7. A power assisted brake device as claimed in claim 1 or 2, wherein: The length of the first telescopic cylinder is greater than the maximum stroke of the third pull rod moving in the first telescopic cylinder.

8. A power assisted brake device as claimed in claim 1, wherein: The length of the second telescopic cylinder is greater than the maximum stroke of the fourth pull rod moving in the second telescopic cylinder.

9. A method of operating a brake in a manual mode or an automatic mode, using the brake device according to any one of claims 1 to 8, characterized in that, The method comprises: The method of manual brake comprises the following steps: (1) When the manual brake is pulled, the pulling force is transmitted to the pull rod cam through the connecting fork head, the first pull rod, the adjusting rod, the second pull rod, the first telescopic cylinder and the third pull rod, and the second pull rod drives the first telescopic cylinder to move downward, and since the third pull rod is at the uppermost end of the first telescopic cylinder, the downward movement of the first telescopic cylinder drives the pull rod to move downward, thereby driving the pull rod cam to complete the brake action. (2) When the hand brake is released, with the release of the pumping unit brake handle, the connecting fork, the first pull rod, the adjusting rod, the second pull rod and the first telescopic cylinder go up to the initial state, the upward movement of the first telescopic cylinder causes the third pull rod to enter the first telescopic cylinder, the tension disappears, and the third pull rod is reset upward under the action of the brake reset spring; The method of automatic brake comprises the following steps: (1) When the pumping unit is stopped or the power grid is powered off, the magnetic force of the electromagnet disappears due to power loss, and the suction plate attracted by the electromagnet is released. At this time, the spring pull rod connected with the suction plate starts to go down under the elastic action of the compressed brake spring, and drives the suction plate, the connecting rod and the second telescopic cylinder to go down together. Since the fourth pull rod is at the uppermost end of the second telescopic cylinder at this time, the downward movement of the second telescopic cylinder will drive the pull rod to go down, thereby pulling the pull rod cam and driving the brake pad to stop the brake wheel to complete the brake action; (2) When the automatic brake is powered on, the actuator pushes the push rod to go up from the initial position 1, compresses the brake spring and pushes the spring pull rod and the suction plate to go up. When the suction plate is attached to the electromagnet, it is magnetically attracted and locked by the electromagnetic force of the electromagnet. At this time, the push rod goes up to position 2, and then the push rod goes down to reset to the initial position 1. The connecting rod goes up to the maximum displacement with the suction plate, and at the same time, the connecting rod drives the second telescopic cylinder to go up to the maximum displacement. At this time, the fourth pull rod is reset upward under the action of the brake reset spring.

Images