Safety protection device of wellhead pumping unit

Abstract

The utility model relates to the technical field of safety devices, in particular to a safety protection device of a wellhead pumping unit, which comprises a fence, a maintenance door is hinged to the fence, two locking pin rods are slidably mounted on the maintenance door, locking insertion holes are formed in corresponding positions of the fence, a locking disc is rotatably mounted on the maintenance door, and locking grooves are formed in two sides of the locking disc. The locking disc penetrates through the maintenance door to the outer side and is fixedly connected with an opening and closing handle, a safety groove is formed in the side face of the locking disc, a safety pin is slidably installed on the maintenance door, a driving piece is fixedly installed on the maintenance door, and the output end of the driving piece is fixedly connected with the safety pin. A first proximity switch is fixedly installed at the position of a hand brake of the oil pumping unit and electrically connected with the driving piece. The fence is arranged for enclosure, and the maintenance door linked with the hand brake is arranged, so that the safety risk caused by misoperation or less operation of an operator is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of safety devices, in particular to a safety protection device of a wellhead pumping unit. BACKGROUND

[0002] At present, the process of wellhead is mostly adopted by beam pumping unit, including beam, reversing through connecting rod mechanism, and balance through crank block, commonly known as kowtow machine. When in use, the driving part drives the crank to rotate, and then drives the beam part to pump oil through the connecting rod. The balance block is rotatably arranged at the connecting position of the connecting rod and the crank.

[0003] The balance block and the crank are movable mechanisms exposed outside. When the related position is maintained, the related power supply needs to be closed, the hand brake needs to be pulled tight, and the dead brake needs to be tightened, so as to avoid accidents. However, in the actual operation process, accidents may occur due to the illegal operation of workers. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a safety protection device of a wellhead pumping unit which improves the protection effect.

[0005] The above application purpose of the present application is realized by the following technical scheme:

[0006] A safety protection device of a wellhead pumping unit comprises:

[0007] A fence is fixedly installed around the base part of the pumping unit.

[0008] A maintenance door is hingedly installed on a maintenance opening of the fence.

[0009] Two lock pins are slidably installed on the side of the maintenance door away from the hinged position, and the fence is provided with a lock hole at the corresponding position.

[0010] A lock disc is rotatably installed at the middle of the side of the maintenance door away from the hinged position. Lock grooves are formed on both sides of the lock disc, the lock pins are slidably connected to the lock grooves, and an opening and closing handle is fixedly connected to the outside of the maintenance door through the lock disc.

[0011] A safety pin is slidably installed on the maintenance door. A safety groove is formed on the side of the lock disc. When the lock pin is inserted into the lock hole, the safety pin is opposite to the safety groove.

[0012] A driving part is fixedly installed on the maintenance door. The output end of the driving part is fixedly connected to the safety pin.

[0013] The first proximity switch is fixedly installed at the hand brake position of the pumping unit, and is turned on when the hand brake is pulled tight. The first proximity switch is electrically connected to the driving member.

[0014] Optionally, the fence is fixedly installed with a reset torsion spring at the position of the maintenance door hinge shaft. The output end of the reset torsion spring abuts against the maintenance door to open the maintenance door.

[0015] Optionally, the maintenance door and the fence are installed with a second proximity switch. The second proximity switch is turned on after the maintenance door is opened. The second proximity switch is electrically connected to a danger indicator lamp installed at the hand brake position of the pumping unit.

[0016] Optionally, the second proximity switch is electrically connected to a buzzer alarm lamp. The buzzer alarm lamp is electrically connected to a close alarm switch. The close alarm switch is arranged at the dead brake operating position of the pumping unit. The close alarm switch is connected to the second proximity switch.

[0017] Optionally, the buzzer alarm lamp is installed in a self-locking circuit. The second proximity switch and the close alarm switch are respectively a normally open button switch and a normally closed button switch. The fence is rotatably installed with an L-shaped piece. The L-shaped piece is abutted against one side of the first end of the L-shaped piece. When the maintenance door is rotated to abut against the second end of the L-shaped piece, the L-shaped piece is pushed to rotate.

[0018] Optionally, the L-shaped piece is installed with a reset spring.

[0019] Optionally, the danger indicator lamp is installed in a self-locking circuit. The fence is fixedly installed with a close lamp switch. The close lamp switch is located at the side of the first end of the L-shaped piece away from the second proximity switch.

[0020] In summary, the present application has at least one of the following beneficial technical effects:

[0021] The fence is arranged to enclose the dangerous position, and the maintenance door is arranged to facilitate entry. The maintenance door is locked by the locking disc and the locking pin rod. The locking disc is locked by the safety pin. The safety pin is connected to the first proximity switch at the hand brake position. In the state that the first proximity switch is not triggered, the safety pin locks the position of the locking disc. The fence is arranged to enclose, and the maintenance door is arranged to be linked with the hand brake. In the case that the hand brake is not locked, the maintenance door cannot be opened, thereby reducing the safety risk caused by the operator's misoperation or less operation.

[0022] The buzzer alarm lamp is arranged, and the close alarm switch for closing the buzzer alarm lamp is arranged at the dead brake operating position. When the worker opens the door, the second proximity switch is triggered under the action of the reset torsion spring, and the buzzer alarm lamp is triggered to emit sound and light signals, thereby reminding the worker to operate the dead brake for locking operation. After the locking is completed, the buzzer alarm lamp is closed by the close alarm switch. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the overall structure from another perspective of an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the locking disk portion according to an embodiment of this application;

[0026] Figure 4 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0027] Reference numerals: 1. Fence; 2. Maintenance door; 31. Locking pin; 311. Locking socket; 32. Locking disc; 321. Locking groove; 322. Opening / closing handle; 41. Safety pin; 42. Safety groove; 43. Drive unit; 44. Light switch; 5. Second proximity switch; 451. L-shaped component. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] Please see Figures 1 to 3 This application discloses a safety protection device for a wellhead pumping unit, comprising a fence 1, which is fixedly installed around the base of the pumping unit. The fence 1 has a maintenance opening, and a maintenance door 2 is hinged to the maintenance opening. Two locking pins 31 are slidably installed on the side of the maintenance door 2 away from the hinge. A locking hole 311 is provided at a corresponding position on the fence 1. A locking disc 32 is rotatably installed in the middle of the side of the maintenance door 2 away from the hinge. Locking grooves 321 are provided on both sides of the locking disc 32, and the locking pins 31 are respectively located in the locking grooves 321. The sliding connection, the locking disc 32 passes through the maintenance door 2 and is fixedly connected to the outer side with the opening and closing handle 322. The side of the locking disc 32 is provided with a safety groove 42. The maintenance door 2 is slidably installed with a safety pin 41. When the locking pin 31 is inserted into the locking socket 311, the safety pin 41 is directly opposite the safety groove 42. The maintenance door 2 is fixedly installed with a drive component 43. The output end of the drive component 43 is fixedly connected to the safety pin 41. The pumping unit handbrake position is fixedly installed with a first proximity switch. When the handbrake is tightened, the first proximity switch is turned on and electrically connected to the drive component 43.

[0030] Specifically, a fence 1 is installed to enclose the hazardous area, and a maintenance door 2 is installed for easy access. The maintenance door 2 is locked by a locking disc 32 and a locking pin 31. The locking disc 32 is locked by a safety pin 41, which is connected to a first proximity switch at the handbrake position. When the first proximity switch is not triggered, the safety pin 41 locks the locking disc 32 in place.

[0031] In this way, by setting the fence 1 to fence, and set with the hand brake linkage maintenance door 2, in the case of the hand brake is not completed locking, maintenance door 2 can not be opened, reduce the risk due to the operator misoperation or less operation.

[0032] In some feasible ways, fence 1 can be selected as steel frame structure and steel net group, maintenance door 2 can be selected as square tube frame and steel plate group, locking pin 31 is cylindrical rod, maintenance door 2 is fixedly installed with connecting block provided with through hole, locking hole 311 can also be provided with connecting block provided with through hole fixedly installed on fence 1, locking disc 32 is I disc shape, the small diameter part in the middle is installed on maintenance door 2 through bearing, locking disc 32 is provided with locking groove 321 close to one end of locking pin 31, locking groove 321 is arc groove close to the inside from the outside of locking disc 32, cylindrical block is fixedly installed on the side of locking pin 31, which can be slidably installed in locking groove 321. Drive 43 can be selected as electric push rod, after drive 43 drives safety pin 41 to insert safety groove 42, locking disc 32 cannot be rotated to unlock.

[0033] The first proximity switch can be selected as a shielding proximity switch, and the signal transmitting end and the receiving end are arranged on both sides of the hand brake handle dead position. When the hand brake handle is pulled to the dead position, the first proximity switch is shielded, triggering the drive 43 to unlock the locking disc 32.

[0034] As a specific embodiment of the safety protection device of the wellhead pumping unit provided in the application, the fence 1 is fixedly installed with a reset torsional spring at the hinge shaft position of the maintenance door 2, and the output end of the reset torsional spring abuts against the maintenance door 2 to make the maintenance door 2 open.

[0035] Overall, by providing The reset torsional spring makes the maintenance door 2 be in an open state after being opened, so that other people can more easily know that the inside of the fence 1 is in a maintenance state.

[0036] In some feasible ways, the reset torsional spring is selected as a common torsional spring, the maintenance door 2 is provided with rotating shafts at both ends, the fence 1 is provided with connecting blocks provided with through holes at corresponding positions, the reset torsional spring is sleeved on the rotating shafts, one end of the reset torsional spring is fixedly connected with the maintenance door 2, the other end of the reset torsional spring is fixedly connected with the fence 1, and the initial state of the reset torsional spring is the state of the maintenance door 2 being opened to the maximum angle.

[0037] Further, the maintenance door 2 and the fence 1 are provided with a second proximity switch 45, the second proximity switch 45 is opened after the maintenance door 2 is opened, the second proximity switch 45 is electrically connected with a danger indicator lamp, and the danger indicator lamp is installed at the hand brake position of the pumping unit.

[0038] It should be understood that by setting the second proximity switch 45 and the danger indicator, it is convenient to remind the staff of the hand brake position that the fence 1 is in a maintenance state.

[0039] In some feasible ways, the second proximity switch 45 can be selected as the same structure as the first proximity switch.

[0040] Further, the second proximity switch 45 is electrically connected with a buzzer alarm lamp, the buzzer alarm lamp is electrically connected with a close alarm switch, the close alarm switch is arranged at the dead brake operating position of the pumping unit, and the close alarm switch is connected with the second proximity switch 45.

[0041] It should be understood that by setting the buzzer alarm lamp and setting the close alarm switch for turning off the buzzer alarm lamp at the dead brake operating position, after the staff opens the door, the second proximity switch 45 is triggered under the action of the reset torsion spring, and then the buzzer alarm lamp emits a sound and light signal to remind the staff to operate the dead brake for locking operation, and after the locking is completed, the buzzer alarm lamp is turned off through the close alarm switch.

[0042] Further, please refer to Figure 4 , the buzzer alarm lamp is installed in the self-locking circuit, the second proximity switch 45 and the close alarm switch are respectively a normally open button switch and a normally closed button switch, the fence 1 is rotatably provided with an L-shaped piece 451, the first end of the L-shaped piece 451 is arranged on one side of the second proximity switch 45, and when the maintenance door 2 is rotated to abut against the second end of the L-shaped piece 451, the L-shaped piece 451 is pushed to rotate.

[0043] It should be understood that by setting the L-shaped piece 451, when the maintenance door 2 is opened, the maintenance door 2 pushes the L-shaped piece 451 to rotate to open the second proximity switch 45, which simplifies the setting of the circuit, improves the service life and stability.

[0044] Further, the danger indicator is installed in the self-locking circuit, the fence 1 is fixedly provided with a close lamp switch 44, and the close lamp switch 44 is located on the side of the first end of the L-shaped piece 451 away from the second proximity switch 45.

[0045] It should be understood that by setting the close lamp switch 44, after the maintenance door 2 is closed, the danger indicator is turned off, prompting the operator that the hand brake part can be closed.

[0046] In some feasible ways, the self-locking circuit is a basic circuit composed of a relay, which will not be described here. The self-locking circuit is opened and closed through the normally open button switch and the normally closed button switch, and the normally open button switch and the normally closed button switch are set as the second proximity switch 45 and the close alarm switch or the close lamp switch 44. The fence 1 is fixedly provided with a connecting block at the upper end, and the L-shaped piece 451 is rotatably arranged on the connecting block. In order to facilitate the reset of the L-shaped piece 451, the L-shaped piece 451 is provided with a reset spring, which can be selected as a torsion spring, or a common spring is arranged between the connecting block and the L-shaped piece 451. In order to facilitate use, the L-shaped piece 451 is arranged on the side close to the locking pin 31.

[0047] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A safety guard for a wellhead pumping unit, characterized by, The utility model provides a kind of oil pumping unit safety fence, including: Fence (1), the fence (1) is fixedly installed around pumping unit base portion; Maintenance door (2), the fence (1) is provided with maintenance opening, the maintenance opening is hingedly installed with the maintenance door (2); Locking pin rod (31), two the locking pin rod (31) is slidably installed in the maintenance door (2) far from hinged position side, the fence (1) corresponding position is provided with locking jack (311); Locking disc (32), the locking disc (32) is rotatably installed in the maintenance door (2) far from hinged position middle, locking slot (321) is opened in the locking disc (32) both sides, the locking pin rod (31) is respectively slidably connected in the locking slot (321), the locking disc (32) is fixedly connected with opening and closing handle (322) outside through the maintenance door (2); Safety pin (41), the safety pin (41) is slidably installed in the maintenance door (2), the locking disc (32) side is provided with safety slot (42), when the locking pin rod (31) is inserted in locking jack (311), the safety pin (41) is opposite the safety slot (42); Driving element (43), the driving element (43) is fixedly installed in the maintenance door (2), and the driving element (43) output end is fixedly connected with the safety pin (41); First proximity switch, the first proximity switch is fixedly installed in pumping unit hand brake position, when hand brake is pulled tight, the first proximity switch is connected, and the first proximity switch is electrically connected with the driving element (43).

2. A safety shield for a wellhead pumping unit as defined in claim 1, characterized in that: The fence (1) is fixedly installed with reset torsion spring in maintenance door (2) hinged shaft position, and the reset torsion spring output end is opposite the maintenance door (2) and makes the maintenance door (2) open.

3. A safety shield for a wellhead pumping unit as defined in claim 2, wherein: The maintenance door (2) is installed with second proximity switch (45) with fence (1), after the maintenance door (2) is opened, the second proximity switch (45) is opened, and the second proximity switch (45) is electrically connected with danger indicating lamp, and the danger indicating lamp is installed in pumping unit hand brake position.

4. A safety shield for a wellhead pumping unit as defined in claim 3 wherein: The second proximity switch (45) is electrically connected with buzzer alarm lamp, and the buzzer alarm lamp is electrically connected with close alarm switch, and the close alarm switch is arranged in pumping unit dead brake operating position, and the close alarm switch is with second proximity switch (45).

5. A safety shield for a wellhead pumping unit as defined in claim 4 wherein: The buzzer alarm lamp is installed in self-locking circuit, and the second proximity switch (45) and close alarm switch are respectively normally open button switch and normally closed button switch, and the fence (1) is rotatably installed with L-shaped piece (451), the L-shaped piece (451) first end one side is opposite the second proximity switch (45), when the maintenance door (2) is rotated and is opposite the second end of the L-shaped piece (451), the L-shaped piece (451) is rotated.

6. A safety shield for a wellhead pumping unit as defined in claim 5 wherein: The L-shaped piece (451) is installed with reset spring.

7. A safety shield for a wellhead pumping unit as defined in claim 5 wherein: The danger indicating lamp is installed in self-locking circuit, and the fence (1) is fixedly installed with close lamp switch (44), and the close lamp switch (44) is located in the first end of the L-shaped piece (451) far from the second proximity switch (45) one side.

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