CN-224228636-U - Packing box that beam-pumping unit polished rod is intelligent sealed

Abstract

The utility model discloses a packing box for intelligently sealing a polished rod of an oil pumping unit, which comprises a box body, packing, a gland and a polished rod, wherein the packing is arranged in the box body, the gland can be sleeved at one end of the box body and is connected with one end of the packing or is in abutting contact with the packing, one end of the polished rod can be axially movably inserted into the box body and penetrates through the gland and the packing, the packing box also comprises a pressure sensor, an elastic piece and a driving control assembly, the pressure sensor is arranged at the other end of the packing to detect pressure information, the elastic piece is arranged between the other end of the packing and the pressure sensor, and the driving control assembly is connected with the gland to control the action of the gland to squeeze the packing to deform according to the pressure information. The utility model can solve the problems that the compression of the rubber packing is not quantitative, and operators are required to carry out the inspection and screwing operation frequently, and achieves the purposes of improving the sealing rate of the packing box and improving the efficiency of the pumping unit system.

Inventors

• WANG ZHANJUN
• ZHOU LIJIE
• SHEN YANG
• LI XING
• XU YANXIAO

Assignees

• 厦门工学院

Dates

Publication Date

20260512

Application Date

20250321

Priority Date

20240527

Claims (10)

1. 1. The intelligent sealing packing box for the polish rod of the pumping unit comprises a box body, a packing, a gland and the polish rod, wherein the packing is arranged in the box body, the gland can be sleeved at one end of the box body and connected with one end of the packing or in abutting contact with the packing, one end of the polish rod can be axially movably inserted into the box body and penetrates through the gland and the packing.
2. 2. The packing box of claim 1, further comprising a detection switch mounted on the box body near the end of the gland to send a trigger signal when touched by the gland, wherein the drive control assembly is connected with the detection switch to send a reminding message when receiving the trigger signal, and stops controlling the gland.
3. 3. The packing box of claim 1, further comprising a pressure ring disposed on an inner side of the pressure cover opposite to the packing end, the pressure ring abutting against the packing end.
4. 4. The packing box of claim 1, wherein the drive control assembly comprises a controller, a transmission gear and a drive motor, wherein the controller, the drive motor and the pressure sensor are electrically connected, an output end of the drive motor drives the transmission gear to rotate, and the transmission gear is connected with and drives the gland to rotate so as to generate axial displacement.
5. 5. The packing box of claim 4, wherein the controller is mounted on the driving motor or the controller and the driving motor are respectively mounted on a fixed bracket, and the fixed bracket is connected to the outer side of the box body.
6. 6. The packing box of claim 1, wherein the box body is provided with a containing cavity, and the packing, the elastic piece and the pressure sensor are located in the containing cavity and are distributed along the axial direction.
7. 7. The packing box of claim 6, wherein the pressure sensor of the accommodating cavity is further provided with a mounting boss, and further comprising a bottom baffle ring mounted on the mounting boss and positioned at the bottom of the pressure sensor.
8. 8. The packing box of claim 1, further comprising a blowout preventer and a coupling, wherein the other end of the polish rod passes through the blowout preventer, and the coupling is connected and sealed with the top of the blowout preventer and the other end of the box body through threads.
9. 9. The packing box of claim 1, wherein the number of the packing is plural, and the plurality of the packing is axially distributed to form a packing group.
10. 10. The packing box of claim 1 or 9, wherein the packing material is a rubber material.

Description

Packing box that beam-pumping unit polished rod is intelligent sealed Technical Field The utility model relates to the technical field of oil exploitation, in particular to an intelligent sealing packing box for a polish rod of an oil pumping unit. Background The packing box is a wellhead dynamic sealing device which is arranged on a wellhead and used for sealing the annular space between the oil pipe and the polish rod. When the oil pumping polished rod is driven by the ground oil pumping equipment to do up-and-down reciprocating motion, the sealing function of the packing box prevents crude oil from overflowing outwards. The common packing box working principle is that the annular rubber packing in the box cavity is compressed by screwing the gland, so that the annular rubber packing is deformed, and the polished rod is held tightly to play a sealing role. The device has the following defects that firstly, the compression of the rubber packing is not quantified, the compression degree of the rubber packing is insufficient by the experience of an operator, the rubber packing is not tightly sealed with a polish rod to easily leak if the compression degree of the rubber packing is excessively high by the screwing gland, the mutual friction is increased by the over-tightening of the rubber packing and the lever sealing, the efficiency of a system is reduced, secondly, the labor capacity is increased, the abrasion of the rubber packing is caused by the relative motion friction of the polish rod and the packing, the operator is required to regularly screw the gland, the period is not fixed, and the labor capacity is increased. Disclosure of utility model The utility model provides an intelligent sealing packing box of a polish rod of an oil pumping unit, which is used for solving the problems that the compression of rubber packing is not quantitative and an operator is required to carry out the inspection and screwing operation frequently, and achieving the purposes of improving the sealing rate of the packing box and improving the efficiency of an oil pumping unit system. The technical scheme includes that the intelligent sealing packing box for the polish rod of the oil pumping unit comprises a box body, a packing, a gland and the polish rod, wherein the packing is installed in the box body, the gland can be sleeved at one end of the box body and is connected with one end of the packing or is in abutting contact with the packing, one end of the polish rod can be axially movably inserted into the box body and penetrates through the gland and the packing, the intelligent sealing packing box is characterized by further comprising a pressure sensor, an elastic piece and a driving control assembly, the pressure sensor is arranged at the other end of the packing to detect pressure information, the elastic piece is arranged between the other end of the packing and the pressure sensor, and the driving control assembly is connected with the gland to control the gland to act to squeeze the packing to deform according to the pressure information. Further, the automatic pressing device also comprises a detection switch, wherein the detection switch is arranged on the box body, is close to the end where the pressing cover is positioned, and is used for sending a trigger signal when the detection switch is touched by the pressing cover, and the driving control assembly is connected with the detection switch, is used for sending reminding information when the trigger signal is received, and stops controlling the pressing cover to act. Further, the packing sleeve further comprises a pressing ring, the pressing ring is arranged on the inner side of the pressing cover opposite to one end of the packing, and the pressing ring abuts against one end of the packing. Further, the drive control assembly comprises a controller, a transmission gear and a driving motor, wherein the controller, the driving motor and the pressure sensor are electrically connected, the output end of the driving motor drives the transmission gear to rotate, and the transmission gear is connected with and drives the gland to rotate so as to generate axial displacement. Further, the controller is mounted on the driving motor, or the controller and the driving motor are respectively mounted on a fixed support, and the fixed support is connected to the outer side of the box body. Further, the box body is provided with a containing cavity, and the packing, the elastic piece and the pressure sensor are located in the containing cavity and are distributed along the axial direction. Further, the pressure sensor of the accommodating cavity is provided with an installation boss at the end, and the pressure sensor further comprises a bottom baffle ring which is installed on the installation boss and is positioned at the bottom of the pressure sensor. Further, the well plugging device further comprises a well plugging device and a coupling, wherein the other end of th