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CN-121739131-B - One-machine one-shell two-core intelligent regulation stop valve group nesting structure and control system

CN121739131BCN 121739131 BCN121739131 BCN 121739131BCN-121739131-B

Abstract

The invention discloses a nested structure of a one-machine one-shell two-core intelligent regulating stop valve group and a control system, and relates to the technical field of stop valves, wherein the structure comprises a main body component and a valve component, and the main body component comprises a connecting flange, a base arranged on the connecting flange and a valve body arranged on the base; the valve assembly is arranged in the valve body and comprises a screw rod arranged in the valve body, a stop valve core arranged at the end part of the screw rod, a connecting pin arranged on the stop valve core, an adjusting valve core sleeved outside the stop valve core and a first spring sleeved outside the screw rod, wherein the stop function and the adjusting function are integrated in the single valve body and are realized through double valve cores, the pipeline system is greatly simplified, the installation space is saved, potential leakage points are reduced, the integrity and the reliability of the system are improved, the stop valve core and the adjusting valve core are both in a communicated space, and when the valve core moves, gas at the upper part and the lower part of the valve core freely circulate through gaps around the valve core, so that the pressure at two sides of the valve core is basically balanced.

Inventors

  • Yang Dede
  • MA LIJUN
  • WEN LIANG
  • HAN LI

Assignees

  • 陕西百豪科技发展有限责任公司

Dates

Publication Date
20260512
Application Date
20260228

Claims (7)

  1. 1. A nested structure of a two-core intelligent regulation stop valve group of a machine shell is characterized by comprising: The main body assembly (100) comprises a connecting flange (101), a base (102) arranged on the connecting flange (101), a valve body (103) arranged on the base (102), a control module (104) arranged on the top of the valve body (103) and a motor (105) connected with the control module (104); the valve assembly (200) is arranged in the valve body (103) and comprises a screw rod (201) arranged on the central shaft of the valve body (103), a stop valve core (202) arranged at the end part of the screw rod (201), a connecting pin (203) arranged on the stop valve core (202), an adjusting valve core (204) sleeved outside the stop valve core (202) and a first spring (205) sleeved outside the screw rod (201); The connecting flange (101) is fixedly connected with the base (102), the base (102) is fixedly arranged at the bottom end inside the valve body (103), the valve body (103) is also provided with an air inlet (1031), an annular space (1032) communicated with the air inlet (1031), a strip-shaped hole (1033) communicated with the annular space (1032), a valve seat hole (1034) arranged at the bottom of the valve body (103), and the connecting flange (101) is provided with an air outlet (1011); the valve body (103) is internally provided with a connecting cavity (1035), the strip-shaped hole (1033) is communicated with the connecting cavity (1035), the strip-shaped hole (1033) is arranged on one side of the connecting cavity (1035), the valve seat hole (1034) is communicated with the connecting cavity (1035), the valve seat hole (1034) is arranged below the connecting cavity (1035), and the valve seat hole (1034) is communicated to the air outlet (1011); The screw rod (201) is arranged on a central shaft of the connecting cavity (1035), a valve seat (1021) is arranged above the base (102), a second spring (1022) is further arranged between the valve seat (1021) and the base (102), the stop valve core (202) is sleeved at the bottom of the screw rod (201), the connecting pin (203) penetrates through the stop valve core (202) and the screw rod (201), and the stop valve core (202) is attached to the valve seat (1021).
  2. 2. The one-machine one-shell two-core intelligent regulation stop valve group nesting structure of claim 1, wherein the control module (104) is fixedly arranged on the valve body (103), the control module (104) controls the operation mode of the motor (105), and the output shaft of the motor (105) controls the lifting of the screw rod (201) through a nut.
  3. 3. The one-machine one-shell two-core intelligent regulation stop valve group nesting structure of claim 2, wherein the regulation valve core (204) is slidably arranged in the connecting cavity (1035), a limit ring (2041) is arranged at the top of the regulation valve core (204), the regulation valve core (204) is sleeved outside the screw rod (201) and the stop valve core (202), a connecting hole (2042) is formed in the regulation valve core (204), the connecting pin (203) is positioned in the connecting hole (2042), one end of the first spring (205) is connected with the inner wall at the top of the connecting cavity (1035), and the other end of the first spring is fixedly connected with the regulation valve core (204).
  4. 4. A control system adopting the one-machine one-shell two-core intelligent regulation stop valve group nesting structure as claimed in claim 3, which is characterized by comprising a stroke dividing module and a function realizing module; the stroke dividing module is used for indicating the control module (104) to divide the total stroke into an idle stroke unit of the stop valve core (202) and a load stroke unit of the drive regulating valve core (204) according to the lifting distance of the screw rod (201); The function realizing module is used for indicating the control module (104) to control the motor (105) to run at a first speed until the stop valve core (202) reaches a preset position when the idle stroke unit is started; When the idle stroke unit transits to the load stroke unit, the control module (104) is instructed to control the motor (105) to switch to a second speed, and coupling detection is executed; when the load stroke unit is started, the control module (104) is instructed to control the motor (105) to adjust the opening of the regulating valve core (204) according to the signal acquired by the pressure sensor.
  5. 5. The control system of claim 4, wherein the first speed is a rated maximum speed of the motor.
  6. 6. The control system of claim 5, wherein the coupling detection means detects the rate of change of the drive current of the motor (105) in real time when the shut-off valve core (202) is about to drive the regulating valve core (204) to move through the connecting pin (203), and determines that the regulating valve core (204) has successfully moved in an intervening manner when a step-like sudden increase in the drive current is detected.
  7. 7. The control system of claim 6, wherein limiting the maximum output current of the motor (105) causes the shut-off valve spool (202) to press against the valve seat (1021) with a constant and limited hold-down force when the control module (104) detects movement of the shut-off valve spool (202) to the fully closed position.

Description

One-machine one-shell two-core intelligent regulation stop valve group nesting structure and control system Technical Field The invention relates to the technical field of stop valves, in particular to a one-machine one-shell two-core intelligent adjusting stop valve group nesting structure and a control system. Background At present, in the ground gathering and transportation system of the oil and gas field at home and abroad, an electric regulating valve (comprising a conventional electric regulating needle valve and an inlet ultrahigh voltage electric regulating valve) is widely adopted to remotely and simultaneously realize the functions of regulating the wellhead pressure flow of the regulating valve, switching the well of the stop valve and the like. However, the existing single-set regulating valve is used for simultaneously replacing the regulating valve and the stop valve, so that the electric regulating valve in the prior art has the obvious technical defects and application bottlenecks that only one set of valve cores is configured no matter how the electric regulating valve is driven. This means that the same valve core has to take on two tasks of flow regulation and sealing stop, and in the production process of a gas well, the valve core needs to be in a semi-open and semi-closed throttling state for a long time in order to control pressure and yield. At this time, high-pressure natural gas (often accompanied by stratum sand) washes the throttle surfaces of the valve core and the valve seat at extremely high flow velocity, so that serious cavitation and erosion phenomena are caused, and when shut-in and shut-off are required, the valve cannot be tightly shut-off due to damage of the sealing surface of the valve core caused by erosion in the adjustment process, so that internal leakage is generated. The structural contradiction of the 'seal loss due to adjustment' makes the traditional single-valve core adjusting valve difficult to use as a reliable safety shut-in and shut-off device. The remote intelligent control system not only can not meet the requirements of remote intelligent control of the natural gas well and intelligent and digital construction and management of the natural gas well, but also greatly increases the later maintenance cost, and frequent overhauling and replacement force production interruption, so that the continuous exploitation efficiency of the gas well is seriously affected. Therefore, a nested structure and a control system of a one-machine one-shell two-core intelligent adjusting stop valve group are urgently needed to solve the problems. Disclosure of Invention This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application. The invention is provided in view of the problems of the existing one-machine one-shell two-core intelligent adjusting stop valve group nesting structure and the control system. Therefore, the invention aims to provide a one-machine one-shell two-core intelligent regulation stop valve group nesting structure and a control system, which provide a one-shell two-core nesting type integrated intelligent regulation stop valve group structure with complete and reliable functions, exquisite structure, manual, automatic and remote control, realize the multi-valve function by simultaneously controlling two groups of valve cores through one set of electric executing mechanism, effectively ensure the intelligent and safe management and control of an unattended natural gas well, and greatly reduce the labor intensity and the management cost. The technical scheme includes that the intelligent regulation stop valve group nesting structure comprises a main body assembly, a valve body, a valve assembly and a valve assembly, wherein the main body assembly comprises a connecting flange, a base arranged on the connecting flange, a valve body arranged on the base, a control module arranged at the top of the valve body and a motor connected with the control module, the valve assembly is arranged in the valve body and comprises a screw rod arranged on a central shaft of the valve body, a stop valve core arranged at the end part of the screw rod, a connecting pin arranged on the stop valve core, an adjusting valve core sleeved outside the stop valve core and a first spring sleeved outside the screw rod. The intelligent regulation stop valve group nested structure comprises a connecting flange, a base, an air inlet, an annular space, a strip-shaped hole and a valve seat hole, wherein the connecting flange is fixedly connected with the base, the base is fixedly arranged at the bottom end inside a valve body, the annular space is communicated with the air inlet, the strip-shaped hole is communic