Integrated actuator capable of adjusting driving pressure

Abstract

The invention relates to the field of oil exploitation, in particular to an integrated actuator capable of adjusting driving pressure, which comprises a shell and a piston assembly in the shell, a pressure input end is arranged on the shell, and the piston assembly can extend out in the shell to open a valve or retract to close the valve based on the input pressure of the pressure input end. A pressure regulation and control assembly is further integrated on the shell, the upstream end of the pressure regulation and control assembly is connected with a pressure source, the downstream end of the pressure regulation and control assembly communicates with the pressure input end, and the pressure regulation and control assembly comprises a pressurization unit and a pressure reduction unit and can regulate the pressure of a medium transmitted by the pressure source; according to the actuator, the pressure regulation and control assembly is arranged in the shell, so that the pressure input into the shell is controllable, the piston assembly in the shell moves more stably, the use requirement can be met, the pressure regulation and control assembly and the shell are integrated, the actuator can adapt to various pressure sources and various long-line pipelines, and the use convenience is improved.

Description

Technical Field

[0001] The invention relates to the field of oil extraction, and in particular to an integrated actuator capable of adjusting driving pressure. Background Art

[0002] During offshore oil production, actuators based on pneumatic or hydraulic systems are required during the drilling or production process to control the opening and closing of valves. The pressure source of the pneumatic or hydraulic system is often set thousands or even tens of kilometers away from the oil well. Due to the long distance between the two places, the pressure of the pressure source often does not match the pressure required by the actuator, affecting production and use. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an integrated actuator capable of adjusting driving pressure, comprising:

[0004] A housing, wherein a pressure input terminal is provided on the housing;

[0005] A piston assembly, the piston assembly being disposed in the housing and driving the piston assembly to extend in the housing to open the valve or to retract in the housing to close the valve based on the input pressure of the pressure input end;

[0006] A pressure regulating component is integrated on the shell, the upstream end of the pressure regulating component is connected to a pressure source, and the downstream end of the pressure regulating component is connected to the pressure input end. The pressure regulating component includes a booster and a pressure reducing valve. The booster can boost the medium and then output it, and the pressure reducing valve can discharge a pressure higher than a set threshold.

[0007] Preferably, a mounting substrate is provided on the housing, and the pressure regulating component is integrally mounted on the mounting substrate.

[0008] Preferably, the pressure regulating component also includes an input control valve and a pilot control valve, the input control valve has at least three-way connection, and is at least connected to an input passage, a first output passage, and a second output passage, and the input passage is connected to the pressure source; the pilot control valve has at least three-way connection, which is respectively connected to the pressure input end, the first output passage, and the second output passage.

[0009] Preferably, the pilot control valve has four-way connection, and the pilot control valve is also connected to a safety exhaust valve, and the safety exhaust valve is connected to the external atmosphere.

[0010] Preferably, a pressure gauge is provided between the pilot control valve and the pressure input end, and the pilot control valve has a pressure maintaining position. When the pilot control valve is in the pressure maintaining position, the pressure input end can be closed.

[0011] Preferably, the pressure medium of the pressure regulating component is air, and the pressure source is an air pressure base station.

[0012] Preferably, an air filter is provided between the pressure source and the input control valve.

[0013] Preferably, a pressure chamber connected to the pressure input end is provided inside the housing, the piston assembly comprises a piston, a pressure plate and a valve stem which are arranged in sequence and abut against each other, one end of the piston away from the pressure plate is sealed and connected in the pressure chamber, and a compression spring is provided between the end of the pressure plate away from the piston and the housing;

[0014] When the pressure chamber is pressurized, the piston, the pressure plate and the valve stem move in a first direction, compressing the compression spring until the valve opens; when the pressure chamber is depressurized, the compression spring resets and drives the piston, the pressure plate and the valve stem to move in the opposite direction of the first direction, and the valve closes.

[0015] Preferably, the pressure chamber is a cylindrical inner cavity, the outer wall of the piston can cooperate with the cylindrical inner cavity of the pressure chamber, and the contour size of one end of the pressure plate abutting against the piston is larger than the inner diameter of the pressure chamber.

[0016] Preferably, the piston assembly also includes a limiting guide rod arranged in the shell, a first limiting hole is opened at one end of the piston abutting against the pressure plate, a second limiting hole is through-set on the pressure plate, and a third limiting hole is opened at one end of the valve stem abutting against the pressure plate, and the first limiting hole, the second limiting hole and the third limiting hole all cooperate with the limiting guide rod.

[0017] By applying the technical solution provided by the present invention, a pressure regulating component is integrated on the shell, and the pressure regulating component includes a booster and a pressure reducing valve installed on the shell. The booster can increase the pressure of the medium inside it and output it, and the pressure reducing valve can discharge the medium pressure higher than the set threshold. When the pressure source presses into the shell, the pressure regulating component adjusts the medium pressure to a predetermined value and then inputs it into the shell, so that the pressure input into the shell is controllable, the movement of the piston assembly in the shell is more stable, and can meet the use requirements, and the pressure regulating component is integrated with the shell, so that the actuator provided by the present invention can be adapted to various pressure sources and various long-line pipelines, thereby improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an integrated actuator capable of adjusting driving pressure provided by an embodiment of the present invention;

[0019] Figure 2It is a schematic diagram of the installation of a pressure regulating component of an integrated actuator capable of adjusting driving pressure provided by an embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of a pressure regulating component of an integrated actuator capable of regulating driving pressure provided by an embodiment of the present invention;

[0021] Among them, 1. Shell; 11. Mounting substrate; 12. Pressure input end; 13. Socket; 2. Piston assembly; 21. Piston; 211. First limit hole; 22. Pressure plate; 221. Second limit hole; 23. Valve stem; 231. Third limit hole; 24. Compression spring; 25. Limit guide rod; 251. First stage; 252. Second stage; 253. Third stage; 3. Pressure regulating assembly; 31. Supercharger; 32. Pilot control valve; 33. Input control valve; 34. Safety discharge valve; 35. Pressure reducing valve; 361. First pressure gauge; 362. Second pressure gauge; 371. First control valve; 372. Second control valve; 38. Stop valve; 39. Release valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Figure 1 It is a schematic diagram of the overall structure of an integrated actuator capable of adjusting driving pressure provided by an embodiment of the present invention.

[0024] like Figure 1 As shown, an integrated actuator for regulating driving pressure provided by an embodiment of the present invention includes a shell 1, a piston assembly 2 arranged in the shell 1 and cooperating with the shell 1, and a pressure regulating assembly 3 integrated on the shell 1. A pressure input terminal 12 is provided on the shell 1 for inputting pressure into the shell 1 to drive the movement of the piston assembly 2. The pressure regulating assembly 3 is arranged on the shell 1, and the input terminal of the pressure regulating assembly 3 is an external pressure source, and the output terminal is connected to the pressure input terminal 12. The pressure regulating assembly 3 includes a pressurizing unit and a depressurizing unit.

[0025] When the medium is transported from the pressure source to the shell 1, the pressure of the medium can be first adjusted to a predetermined value by the pressure regulating component 3 and then input into the shell 1, so that the pressure input into the shell 1 is controllable, and the movement of the piston component 2 in the shell 1 is more stable, which can meet the use requirements; and the pressure regulating component 3 is integrated with the shell 1, so there is no need to set up an additional adjustment mechanism on the transportation pipeline. The actuator can be directly connected to the pipeline and put into use. It can adapt to various situations such as unstable output of the pressure source during long pipeline transportation, thereby improving the convenience of use.

[0026] Among them, the boosting unit can adopt existing boosting equipment such as a boosting pump and a boosting cylinder, and the pressure reducing unit can adopt existing pressure reducing equipment such as a pressure reducing valve and a pressure relief valve, or a proportional control valve can be set in the pressure regulation component 3. Regardless of whether the pressure of the pressure source is too high or too low, the proportional control valve can adjust it to a specified value.

[0027] like Figure 1 As shown, in one of the preferred embodiments, a mounting substrate 11 is provided on the shell 1 for mounting the pressure regulating component 3, wherein the mounting substrate 11 can be a surface with a certain area on the shell 1, or can be a plate body detachably mounted on the shell 1. The pressure regulating component 3 can be installed on the mounting substrate 11 first, and then the mounting substrate 11 can be installed on the shell 1, which is more convenient for assembly. In addition, when it is necessary to inspect and maintain the various devices in the pressure regulating component 3 later, the various devices can be removed together by disassembling the mounting substrate 11, thereby improving the convenience of use.

[0028] Figure 2 It is a schematic diagram of the installation of a pressure regulating component of an integrated actuator capable of adjusting driving pressure provided by an embodiment of the present invention; Figure 3 It is a schematic diagram of a pressure regulating component of an integrated actuator capable of regulating driving pressure provided in one embodiment of the present invention.

[0029] like Figure 2 and Figure 3 As shown, the pressure regulating component 3 includes an input control valve 33 and a pilot control valve 32. The output end of the pilot control valve 32 is connected to the pressure input end 12. One end of the input control valve 33 is connected to the pressure source, and the other end is connected in parallel with a first output passage and a second output passage. The pilot control valve 32 is respectively connected to the first output passage, the second output passage and the pressure input end 12. The first output passage and the second output passage are respectively provided with the above-mentioned boosting unit and decompression unit. When the pressure of the pressure source is input to the pressure regulating component 3, the input control valve 33 determines the mode of adjustment required, and controls the pressure source to connect to the first output passage or the second output passage to increase or decrease its pressure to the set value.

[0030] When the pressure source starts to deliver pressure, it first passes through the input control valve 33. If the input pressure is greater than the set value, the pressure reducing valve 35 will work and reduce the pressure accordingly, and then the pressure medium that meets the set value will be passed into the pressure input end 12 through the second output passage and the pilot control valve 32; if the input pressure is less than the set value, the pressure reducing valve 35 will not work, and after the pressure is increased by the booster 31 in the first output passage, the pressure medium that meets the set value will be passed into the pressure input end 12 through the pilot control valve 32.

[0031] In addition, since the pressure value input by the pressure source is mostly smaller than the target pressure value in current practical applications, under such working conditions, only the booster 31 may be provided without the pressure reducing valve 35 and a series of pipelines and components coordinated with the pressure reducing valve 35.

[0032] like Figure 2 As shown, in one of the preferred embodiments, the pilot control valve 32 is connected to a safety discharge valve 34, and the safety discharge valve 34 is connected to the external atmosphere. When an emergency occurs in the housing 1 or other external structures connected to the actuator and the pressure in the housing 1 needs to be removed, the pilot control valve 32 is connected to the safety discharge valve 34, that is, the pressure input end 12 can be directly connected to the external atmosphere, so that the pressure in the housing 1 can be quickly released to ensure production safety.

[0033] like Figure 2 and Figure 3 As shown, the pilot control valve 32 is connected to the first control valve 371, and the first control valve 371 has the function of a pressure switch, and the other end of the first control valve 371 is connected to a pressure source. When the pressure input by the pressure source is greater than the threshold value of the pressure switch of the first control valve 371, the first control valve 371 controls the pilot control valve 32 to open. At this time, a passage is formed between the pressure source and the pressure input end 12, and the supercharger 31 starts to work; when the pressure input by the pressure source is less than the threshold value of the pressure switch of the first control valve 371, the first control valve 371 controls the pilot control valve 32 to close. At this time, the circuit between the pressure source and the pressure input end 12 is broken, and the supercharger 31 stops working. Through the setting of the first control valve 371, when the pressure input by the pressure source is too small, the system will not enter the working state.

[0034] like Figure 2 and Figure 3 As shown, in one preferred embodiment, the pilot control valve 32 has a pressure holding position. After the pressure medium in the housing 1 is input sufficiently, the pilot control valve 32 can be switched to the pressure holding position, the pressure input end 12 can be closed, and the housing 1 can enter a pressure holding state. A pressure gauge can also be provided between the pressure input end 12 and the pilot control valve 32, as shown in FIG. Figure 3The second pressure gauge 362 shown in the figure can monitor the pressure of the housing 1 when it is maintained, and judge whether additional pressure is needed. In addition, a pressure gauge can also be set at the upstream end of the pilot control valve 32, such as Figure 3 The first pressure gauge 361 shown can monitor the pressure difference before and after the pilot control valve 32 and diagnose the system status based on it.

[0035] Further, such as Figure 3 As shown, the supercharger 31 is connected to a second control valve 372, and the second control valve 372 has a pressure switch function for controlling the operation of the supercharger 31. After the supercharger 31 starts to boost pressure, when its output pressure reaches the pressure threshold of the second control valve 372, the second control valve 372 can cut off the gas supply, thereby closing the supercharger 31; a manual stop valve 38 is arranged at the upstream end of the supercharger 31, and in case of an emergency or a failure of the valve circuit control system, the gas supply of the supercharger 31 can be cut off by the manual stop valve 38, and a relief valve 39 is arranged at the downstream end of the supercharger 31, and the relief valve 39 can be opened manually, so that the operator can manually open and close it according to the actual situation to ensure the safe operation of the system.

[0036] In one of the preferred embodiments, the pressure medium of the pressure regulating component 3 and the pressure source are both air, and the pressure source is an air pressure base station. Using air as the pressure medium is cheaper and cleaner, and when the pressure medium is discharged into the atmosphere through the above-mentioned safety discharge valve 34, or when there is a leak in the pipeline, there will be no problems such as environmental pollution. An air filter can also be set at the upstream end of the input control valve 33 to filter and clean some debris mixed in the pressure source or pipeline; in addition, the pressure medium can also be selected from other media such as hydraulic oil according to actual production conditions, which will not be elaborated here.

[0037] like Figure 1 As shown, in one preferred embodiment, a pressure chamber connected to the pressure input end 12 is provided inside the housing 1. Figure 1 The middle is the cavity between the top of the piston 21 and the inner wall of the housing 1. The piston assembly 2 includes a piston 21, a pressure plate 22 and a valve stem 23 which are arranged in sequence and abut against each other. One end of the piston 21 is sealed and connected to the pressure cavity and can reciprocate in the pressure cavity. A compression spring 24 is arranged between the end of the pressure plate 22 away from the piston and the receiving seat 13 of the housing 1.

[0038] When the valve needs to be opened, the pressure in the pressure chamber increases, and the piston 21, the pressure plate 22 and the valve stem 23 move in the first direction under the action of the pressure so that the valve stem 23 opens the valve. Figure 1The compression spring 24 is compressed and deformed by the pressure of the pressure plate 22 and the receiving seat 13. When the valve needs to be closed, the pressure in the pressure chamber is released, and the piston 21, the pressure plate 22 and the valve stem 23 move in the opposite direction of the first direction under the elastic force of the compression spring 24 when it is reset. Figure 1 The valve stem 23 moves upwards to close the valve.

[0039] In one preferred embodiment, the pressure chamber is a cylindrical inner cavity, the outer wall of the piston 21 can cooperate with the cylindrical inner cavity of the pressure chamber, and the contour size of the end of the pressure plate 22 abutting against the piston 21 is larger than the inner diameter of the pressure chamber. Figure 1 As shown, the upper side of the pressure plate 22 abuts against the outer end surface of the pressure chamber, so that when the compression spring 24 is reset, the upward movement of the pressure plate 22 is limited. Of course, the pressure chamber can also be an inner cavity of other shapes, which will not be described here.

[0040] like Figure 1 As shown, in one of the preferred embodiments, the piston assembly 2 also includes a limiting guide rod 25 arranged in the shell 1, a first limiting hole 211 is opened on the piston 21, a second limiting hole 221 is penetrated through the pressure plate 22, and a third limiting hole 231 is opened at one end of the valve stem 23 abutting against the pressure plate 22. The first limiting hole 211, the second limiting hole 221 and the third limiting hole 231 are all matched with the limiting guide rod 25. Through the setting of the limiting guide rod 25, the reciprocating motion of the piston 21, the pressure plate 22 and the valve stem 23 along the first direction is limited, ensuring that the piston 21, the pressure plate 22 and the valve stem 23 can only reciprocate along a predetermined trajectory, thereby ensuring the working stability of the piston assembly 2.

[0041] Further, such as Figure 1 As shown, the inner diameters of the first limiting hole 211, the second limiting hole 221 and the third limiting hole 231 decrease in sequence. At the same time, the limiting guide rod 25 is fixedly installed inside the housing 1 and is divided into three steps, namely the first stage 251 that cooperates with the first limiting hole 211, the second stage 252 that cooperates with the second limiting hole 221, and the third stage 253 that cooperates with the third limiting hole 231. When the pressure plate 22 and the valve stem 23 move in the housing 1, they are limited in the radial direction by the second stage 252 and the third stage 253, and in the axial direction by the first stage 251 and the second stage 252, so that only contact fit is adopted between the piston 21, the pressure plate 22 and the valve stem 23, which can also ensure the stability of the movement of the piston 21, the pressure plate 22 and the valve stem 23, thereby improving the stability of the actuator.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. An integrated actuator capable of adjusting driving pressure, characterized in that: include: A housing, wherein a pressure input terminal is provided on the housing; A piston assembly, the piston assembly being disposed in the housing and driving the piston assembly to extend in the housing to open the valve or to retract in the housing to close the valve based on the input pressure of the pressure input end; A pressure regulating component is integrated on the shell, the upstream end of the pressure regulating component is connected to a pressure source, the downstream end of the pressure regulating component is connected to the pressure input end, and the pressure regulating component includes a boosting unit and a decompression unit, which can adjust the pressure of the medium entering the pressure input end.

2. The integrated actuator according to claim 1, characterized in that: The housing is provided with a mounting substrate, and the pressure regulating component is integrally mounted on the mounting substrate.

3. The integrated actuator according to claim 1, characterized in that: The boosting unit adopts a boosting pump or a boosting cylinder, and the decompression unit adopts a decompression valve.

4. The integrated actuator according to claim 1, characterized in that: The pressure regulating component also includes an input control valve and a pilot control valve. The input control valve has at least three connections and is at least connected to an input passage, a first output passage, and a second output passage. The input passage is connected to the pressure source. The pilot control valve has at least three connections, which are respectively connected to the pressure input end, the first output passage, and the second output passage. The boosting unit and the pressure reducing unit are respectively arranged in the first output passage and the second output passage.

5. The integrated actuator according to claim 4, characterized in that: The pilot control valve has four ports, and is further connected to a safety exhaust valve, which is connected to the external atmosphere.

6. The integrated actuator according to claim 4, characterized in that: A pressure gauge is provided between the pilot control valve and the pressure input end. The pilot control valve has a pressure maintaining position. When the pilot control valve is in the pressure maintaining position, the pressure input end can be closed.

7. The integrated actuator according to claim 1, characterized in that: The pressure medium of the pressure regulating component is air, and the pressure source is an air pressure base station.

8. The integrated actuator according to any one of claims 1 to 7, characterized in that: A pressure chamber connected to the pressure input end is arranged inside the housing, and the piston assembly includes a piston, a pressure plate and a valve stem arranged in sequence and abutting against each other, an end of the piston away from the pressure plate is sealed and connected in the pressure chamber, and a compression spring is arranged between the end of the pressure plate away from the piston and the housing; When the pressure chamber is pressurized, the piston, the pressure plate and the valve stem move in a first direction, compressing the compression spring until the valve opens; when the pressure chamber is depressurized, the compression spring resets and drives the piston, the pressure plate and the valve stem to move in the opposite direction of the first direction, and the valve closes.

9. The integrated actuator according to claim 8, characterized in that: The pressure chamber is a cylindrical inner cavity, the outer wall of the piston can cooperate with the cylindrical inner cavity of the pressure chamber, and the contour size of one end of the pressure plate abutting against the piston is larger than the inner diameter of the pressure chamber.

10. The integrated actuator according to claim 9, characterized in that: The piston assembly also includes a limiting guide rod arranged in the shell, a first limiting hole is opened at one end of the piston abutting against the pressure plate, a second limiting hole is through-set on the pressure plate, and a third limiting hole is opened at one end of the valve stem abutting against the pressure plate, and the first limiting hole, the second limiting hole and the third limiting hole all cooperate with the limiting guide rod.

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