A metering function gap valve group and metering method

Abstract

The application discloses a metering function valve group and a metering method, and belongs to the field of oil exploitation.The metering function valve group comprises a main valve body, the main valve body comprises a valve seat and a cover plate assembly, and an upper chamber is arranged in the cover plate assembly; an oil inlet chamber, a valve seat chamber and an oil outlet chamber are sequentially arranged in the valve seat, a sealing block, a first spring and a second spring are arranged in the valve seat chamber, a sealing cavity is arranged in the sealing block, an oil inlet hole for being communicated with the oil inlet chamber is arranged at the bottom of the sealing cavity, and an oil outlet hole for being communicated with the oil outlet chamber is arranged at the side of the sealing cavity; a sealing sliding plate and a sliding rod are arranged in the sealing cavity, the sealing sliding plate is in abutment with the inner wall of the sealing cavity, an upper plate and a position sensor are arranged in the upper chamber, the lower end of the sliding rod is connected with the sealing sliding plate, the upper end of the sliding rod is connected with the upper plate, and the position sensor is used for detecting the position of the upper plate; the first spring and the second spring are sleeved on the sliding rod, the first spring is arranged between the sealing sliding plate and the upper wall of the sealing cavity, and the second spring is arranged between the sealing block and the cover plate assembly.

Description

Technical Field

[0001] This invention belongs to the field of petroleum extraction technology, specifically relating to an intermittent valve assembly with metering function and a metering method. Background Technology

[0002] In the oil extraction process, oil fields in the middle and later stages of production often experience low production and low efficiency. At this stage, the oil flow rate in the wells is unstable, resulting in low extraction efficiency and high costs during continuous extraction. To reduce production costs, intermittent extraction of oil wells is usually necessary.

[0003] The common method for intermittent oil well production involves installing an electric valve at the wellhead, which is opened intermittently at preset fixed intervals, such as 8 hours or 12 hours. This allows for intermittent production by opening and closing the electric valve. However, because the opening time of the electric valve is fixed, it cannot be adjusted according to the real-time flow rate of the oil in the well, thus affecting production efficiency. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides an intermittent valve assembly with metering function and a metering method. The technical problem to be solved by this invention is achieved through the following technical solution:

[0005] In a first aspect, the present invention provides an intermittent valve assembly with metering function, including a main valve body, the main valve body including a valve seat and a cover plate assembly mounted on the valve seat, the cover plate assembly having an upper chamber.

[0006] The valve seat has an oil inlet chamber, a valve seat chamber and an oil outlet chamber connected in sequence. The valve seat chamber has a sealing block, a first spring and a second spring. The sealing block is used to regulate the connection and disconnection between the oil inlet chamber and the oil outlet chamber. The sealing block has a sealing chamber. The bottom of the sealing chamber has an oil inlet hole for communicating with the oil inlet chamber, and the side of the sealing chamber has an oil outlet hole for communicating with the oil outlet chamber.

[0007] The sealed cavity is equipped with a sealing slide plate and a slide rod. The sealing slide plate abuts against the inner wall of the sealed cavity. The upper cavity is equipped with an upper plate and a position sensor. The sealing block and the cover plate assembly are respectively provided with a first through hole and a second through hole. The lower end of the slide rod is connected to the sealing slide plate, and the upper end of the slide rod passes through the first through hole and the second through hole in sequence and extends into the upper cavity. The upper end of the slide rod is connected to the upper plate. The position sensor is used to detect the position of the upper plate.

[0008] Both the first and second springs are sleeved on the slide rod. The first spring is located between the sealing slide plate and the upper wall of the sealing cavity, and the second spring is located between the sealing block and the cover plate assembly.

[0009] In one embodiment of the present invention, the cover plate assembly includes a cover plate and an intermediate plate, the intermediate plate being mounted on a valve seat, the cover plate being mounted on the intermediate plate, and the cover plate and the intermediate plate forming an upper chamber;

[0010] The valve seat is also provided with a side oil flow channel and an oil drain hole. The intermediate plate is provided with an auxiliary oil flow channel. The lower end of the side oil flow channel is connected to the oil inlet chamber, the upper end of the side oil flow channel is connected to the first end of the auxiliary oil flow channel, the upper end of the oil drain hole is connected to the second end of the auxiliary oil flow channel, and the lower end of the oil drain hole is connected to the oil outlet chamber.

[0011] In one embodiment of the present invention, an elastic sealing assembly is provided in the oil outlet chamber. The elastic sealing assembly includes a bracket, a sealing plug, a third spring, and a first pressure sensor. The bracket is fixed to the inner wall of the oil outlet chamber, and the sealing plug is used to seal the oil drain hole.

[0012] The bracket has a sliding hole, the sealing plug slides through the sliding hole, the third spring is pressed between the sealing plug and the bracket, and the first pressure sensor is installed on the bracket and is positioned opposite to the lower end of the sealing plug.

[0013] In one embodiment of the present invention, a plurality of slide rods are provided, and the plurality of slide rods are arranged sequentially along the circumference of the sealing slide plate, and each slide rod is fitted with a first spring and a second spring.

[0014] The sealing block has multiple first through holes, and each of the multiple first through holes corresponds to a multiple slide rod. The middle plate has multiple second through holes, and each of the multiple second through holes corresponds to a multiple slide rod.

[0015] In one embodiment of the present invention, a fourth spring is also sleeved on the slide rod, and the fourth spring is located between the upper plate and the middle plate;

[0016] A second pressure sensor is also provided on the upper surface of the sealing block, and the second pressure sensor is positioned opposite to the intermediate plate.

[0017] In one embodiment of the present invention, multiple position sensors are provided along the length direction of the slide bar.

[0018] In one embodiment of the present invention, it further includes a main inlet pipe, a first branch pipe, a second branch pipe, a third branch pipe, and a main outlet pipe;

[0019] The main valve body is installed on the main inlet pipe. One end of the first branch pipe, the second branch pipe, and the third branch pipe are all connected to the main inlet pipe, and the other end is all connected to the main outlet pipe.

[0020] The first branch pipeline is equipped with a first switching valve, a first oil reservoir, and a second switching valve in sequence. The second branch pipeline is equipped with a third switching valve, a multiphase flow meter, a fourth switching valve, a second oil reservoir, and a fifth switching valve in sequence. The second branch pipeline is also equipped with a diversion branch, one end of which is connected between the multiphase flow meter and the fourth switching valve, and the other end of which is connected to the main outlet pipeline. The diversion branch is equipped with a sixth switching valve, and the third branch pipeline is equipped with a seventh switching valve.

[0021] Secondly, the present invention also provides a metering method for an intermittent valve group with metering function, including an intermittent valve group with metering function as provided in the above scheme. The intermittent valve group includes a main valve body, the main valve body includes a valve seat and a cover plate assembly installed on the valve seat, the cover plate assembly is provided with an upper chamber, and the upper chamber is provided with an upper plate and a position sensor.

[0022] The methods include:

[0023] The position of the upper plate is detected by a position sensor, and the time point of each detection is recorded;

[0024] When the position sensor detects the position of the upper plate, the first time point is recorded;

[0025] Record the second time point when the position sensor fails to detect the position of the upper plate;

[0026] Based on the time difference between the first and second time points, calculate the oil pressure and flow rate of the oil between the first and second time points.

[0027] In one embodiment of the present invention, two position sensors are provided along the length direction of the slide rod inside the valve seat, and the two position sensors are a first position sensor and a second position sensor, respectively, with the first position sensor being disposed close to the upper plate;

[0028] The position of the upper plate is detected by a position sensor, and the time point of each detection is recorded, specifically including:

[0029] When the first position sensor detects the position of the upper plate and the second position sensor does not detect the position of the upper plate, record the initial time point when the first position sensor detects the position of the upper plate and the termination time point when the first position sensor does not detect the position of the upper plate. Based on the time difference between the initial time point and the termination time point, calculate the oil pressure and flow rate of the oil between the initial time point and the termination time point.

[0030] When both the first position sensor and the second position sensor detect the position of the upper plate, record the first initial time point when the first position sensor detects the position of the upper plate, record the first termination time point when the first position sensor does not detect the position of the upper plate, record the second initial time point when the second position sensor detects the position of the upper plate, record the second termination time point when the second position sensor does not detect the position of the upper plate, and calculate the oil pressure and flow rate of the oil between the first initial time point and the second initial time point based on the time difference between the first initial time point and the second initial time point, and record them as the first oil data;

[0031] Based on the time difference between the second initial time point and the second termination time point, calculate the oil pressure and flow rate of the oil between the second initial time point and the second termination time point, and record them as the second oil data.

[0032] Based on the time difference between the second termination time point and the first termination time point, calculate the oil pressure and flow rate of the oil between the second termination time point and the first termination time point, and record them as the third oil data.

[0033] Based on the data from the first, second, and third oil fluids, the curves showing the changes in oil pressure and flow rate are derived.

[0034] In one embodiment of the present invention, the cover plate assembly includes a cover plate and an intermediate plate, the intermediate plate being mounted on a valve seat, the cover plate being mounted on the intermediate plate, and the cover plate and the intermediate plate forming an upper chamber;

[0035] The valve seat is also provided with a side oil flow channel and an oil drain hole. The intermediate plate is provided with an auxiliary oil flow channel. The lower end of the side oil flow channel is connected to the oil inlet chamber, the upper end of the side oil flow channel is connected to the first end of the auxiliary oil flow channel, the upper end of the oil drain hole is connected to the second end of the auxiliary oil flow channel, and the lower end of the oil drain hole is connected to the oil outlet chamber.

[0036] An elastic sealing assembly is provided inside the oil outlet chamber. The elastic sealing assembly includes a bracket, a sealing plug, a third spring, and a first pressure sensor. The bracket is fixed to the inner wall of the oil outlet chamber, and the sealing plug is used to seal the oil drain hole.

[0037] The bracket is provided with a sliding hole, the sealing plug is slidably inserted into the sliding hole, the third spring is pressed between the sealing plug and the bracket, and the first pressure sensor is installed on the bracket and is positioned opposite to the lower end of the sealing plug.

[0038] A second pressure sensor is also provided on the upper surface of the sealing block, and the second pressure sensor is positioned opposite to the intermediate plate;

[0039] The intermittent valve assembly also includes a main inlet pipe, a first branch pipe, a second branch pipe, a third branch pipe, and a main outlet pipe;

[0040] The main valve body is installed on the main inlet pipe. One end of the first branch pipe, the second branch pipe, and the third branch pipe are all connected to the main inlet pipe, and the other end is all connected to the main outlet pipe.

[0041] The first branch pipeline is equipped with a first switching valve, a first oil reservoir and a second switching valve in sequence. The second branch pipeline is equipped with a third switching valve, a multiphase flow meter, a fourth switching valve, a second oil reservoir and a fifth switching valve in sequence. The second branch pipeline is also equipped with a diversion branch. One end of the diversion branch is connected between the multiphase flow meter and the fourth switching valve, and the other end of the diversion branch is connected to the main outlet pipeline. The diversion branch is equipped with a sixth switching valve, and the third branch pipeline is equipped with a seventh switching valve.

[0042] The method also includes:

[0043] The first pressure data is obtained by detecting the first pressure sensor, and the oil pressure and flow rate of the oil are calculated based on the first pressure data.

[0044] The second pressure data is obtained by detecting the second pressure sensor, and the oil pressure and flow rate are calculated based on the second pressure data.

[0045] When the first pressure sensor detects pressure, the position sensor does not detect the position of the upper plate, and the second pressure sensor does not detect pressure, the first switch valve is controlled to open, and the third, fifth, sixth, and seventh switch valves are controlled to close. The oil flows into the first oil storage tank through the first branch pipeline. When the oil level in the first oil storage tank reaches the preset height, the second switch valve is controlled to open.

[0046] When the position sensor detects the position of the upper plate and the second pressure sensor does not detect pressure, the third switch valve is opened, and the first, second, and seventh switch valves are closed. The oil flows into the multiphase flow meter through the second branch pipeline. Based on the detection value of the multiphase flow meter and the oil pressure and flow rate change curve, the fourth or sixth switch valve is opened.

[0047] When the second pressure sensor detects pressure, it controls the seventh switch valve to open and controls the first, second, third, fourth, fifth, and sixth switch valves to close.

[0048] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0049] In the above-described scheme of this application, firstly, the oil in the well flows into the inlet chamber through the valve seat inlet and then into the sealing chamber through the inlet hole at the bottom of the sealing chamber. When the oil pressure reaches a first threshold, the oil pushes the sealing slide plate upward. When the height of the sealing slide plate is higher than the height of the outlet hole, the oil flows out from the outlet hole into the outlet chamber and then out through the valve seat outlet. When the oil pressure is less than the first threshold, the sealing slide plate moves downward and blocks the outlet hole, preventing the oil from flowing out. When the oil pressure reaches a second threshold, the oil pushes the sealing block upward, and the oil flows out from the gap between the sealing block and the valve seat into the outlet chamber and then out through the valve seat outlet. When the oil pressure is less than the second threshold, the sealing block moves downward and comes into close contact with the valve seat, preventing the oil from flowing out from the gap between the sealing block and the valve seat. With this structure, both the sealing slide plate and the sealing block can move automatically to open or close the oil flow channel according to the real-time oil pressure and flow rate. This allows the main valve body to intermittently start or close based on the real-time oil pressure and flow rate, eliminating the need to set a fixed opening time, thus improving operational convenience and mining efficiency. Secondly, the position sensor can detect the position of the upper plate, allowing for the calculation of the oil pressure and flow rate within the corresponding time period based on the moment the sensor detects the upper plate.

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the main valve body in an embodiment of the present invention. Figure 1 ;

[0052] Figure 2 yes Figure 1 An enlarged view at point A;

[0053] Figure 3 This is a schematic diagram of the main valve body in an embodiment of the present invention. Figure 2 ;

[0054] Figure 4 yes Figure 1 An enlarged view at point B;

[0055] Figure 5 This is a schematic diagram of the sealing block in an embodiment of the present invention. Figure 1 ;

[0056] Figure 6 This is a schematic diagram of the sealing block in an embodiment of the present invention. Figure 2 ;

[0057] Figure 7 This is a top view of the sealing block in an embodiment of the present invention;

[0058] Figure 8This is a schematic diagram of the intermediate valve assembly provided in an embodiment of the present invention.

[0059] Reference numerals: 100-Main valve body, 1-Valve seat, 101-Inlet chamber, 102-Valve seat cavity, 103-Outlet chamber, 2-Cover plate assembly, 21-Cover plate, 22-Intermediate plate, 23-Upper chamber, 3-Sealing block, 4-First spring, 5-Second spring, 6-Sealing slide plate, 7-Slide rod, 8-Position sensor, 9-Outlet hole, 10-Inlet hole, 11-Side oil flow channel, 12-Auxiliary oil flow channel, 13-Drain hole, 14-Elastic sealing assembly, 14 1-Bracket, 142-Sealing plug, 143-Third spring, 144-First pressure sensor, 15-Fourth spring, 16-Upper plate, 17-Second pressure sensor, 201-First switching valve, 202-First oil reservoir, 203-Second switching valve, 204-Third switching valve, 205-Multiphase flow meter, 206-Fourth switching valve, 207-Second oil reservoir, 208-Fifth switching valve, 209-Sixth switching valve, 210-Seventh switching valve. Detailed Implementation

[0060] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0061] Example 1:

[0062] Please see Figures 1 to 8 This invention provides an intermittent valve assembly with metering function, including a main valve body 100. The main valve body 100 includes a valve seat 1 and a cover plate assembly 2 mounted on the valve seat 1. The cover plate assembly 2 has an upper chamber 23. The valve seat 1 has an oil inlet chamber 101, a valve seat chamber 102, and an oil outlet chamber 103 connected in sequence. The valve seat chamber 102 has a sealing block 3, a first spring 4, and a second spring 5. The sealing block 3 is used to regulate the connection and disconnection between the oil inlet chamber 101 and the oil outlet chamber 103. The sealing block 3 has a sealing cavity. The bottom of the sealing cavity has an oil inlet hole 10 for communicating with the oil inlet chamber 101, and the side of the sealing cavity has an oil outlet for communicating with the oil outlet chamber 103. Hole 9; The sealing cavity is provided with a sealing slide plate 6 and a slide rod 7. The sealing slide plate 6 abuts against the inner wall of the sealing cavity. The upper chamber 23 is provided with an upper plate 16 and a position sensor 8. The sealing block 3 and the cover plate assembly 2 are respectively provided with a first through hole and a second through hole. The lower end of the slide rod 7 is connected to the sealing slide plate 6. The upper end of the slide rod 7 passes through the first through hole and the second through hole in sequence and extends into the upper chamber 23. The upper end of the slide rod 7 is connected to the upper plate 16. The position sensor 8 is used to detect the position of the upper plate 16. The first spring 4 and the second spring 5 are both sleeved on the slide rod 7. The first spring 4 is located between the sealing slide plate 6 and the upper wall of the sealing cavity. The second spring 5 is located between the sealing block 3 and the cover plate assembly 2.

[0063] In some embodiments of this application, the valve seat 1 includes a seat body, an oil inlet connector, and an oil outlet connector. The seat body has an oil inlet and an oil outlet on its two sides, respectively. The oil inlet connector is installed to the oil inlet, and the oil outlet connector is installed to the oil outlet. The oil inlet connector is connected to the oil inlet pipeline, and the oil outlet connector is connected to the oil outlet pipeline.

[0064] In some embodiments of this application, the seat includes a base and a pressure plate. The pressure plate is installed on the upper part of the base, and the pressure plate and the base are connected by bolts or welding. The pressure plate has a central hole, and the slide rod 7 extends through the central hole.

[0065] In some embodiments of this application, the base is provided with a valve body cavity, and the valve body cavity is provided with a vertical partition plate, which divides the valve body cavity into an oil inlet cavity 101 and an oil outlet cavity 103. The valve body is also provided with a horizontal partition plate. The base, the horizontal partition plate and the pressure plate together form a valve seat cavity 102. The two sides of the sealing block 3 are pressed against the horizontal partition plate and the vertical partition plate respectively.

[0066] In some embodiments of this application, a sealing ring is provided on the bottom surface of the sealing block 3.

[0067] In some embodiments of this application, the top of the pressure plate is provided with an annular limiting protrusion, which cooperates with the sealing block 3 to limit the sealing block 3 from moving upward and disengaging from the valve seat cavity 102.

[0068] In some embodiments of this application, the stiffness of the first spring 4 is less than the stiffness of the second spring 5.

[0069] In some embodiments of this application, the sealing slide plate 6 is a circular plate, the sealing cavity is an annular cavity, the outer peripheral surface of the sealing slide plate 6 is in contact with the inner wall of the sealing cavity, and a plurality of sealing rings are provided between the outer peripheral surface of the sealing slide plate 6 and the inner wall of the sealing cavity, and the plurality of sealing rings are arranged sequentially along the axial direction of the sealing slide plate 6.

[0070] In some embodiments of this application, the upper wall of the upper chamber 23 is provided with an annular plate, the inner diameter of the annular plate is larger than the outer diameter of the annular surrounding plate, and a position sensor 8 is provided on the inner wall of the annular plate.

[0071] In some embodiments of this application, the position sensor 8 can be a common existing infrared sensor, which includes an infrared transmitter and an infrared receiver, both of which are mounted on the inner wall of the annular plate and are arranged opposite to each other.

[0072] In some embodiments of this application, the upper plate 16 includes a circular plate and an annular surrounding plate, which are connected and coaxially arranged, with the annular surrounding plate located below the circular plate. In this embodiment, the position sensor 8 includes an infrared transmitter and an infrared receiver. When the upper plate 16 moves away from the sealing block 3 along the axial direction of the slide rod 7, the annular surrounding plate blocks the infrared light between the infrared transmitter and the infrared receiver, preventing the infrared receiver from receiving the infrared light emitted by the infrared transmitter, thereby achieving position detection of the upper plate.

[0073] In the above-described scheme of this application, firstly, the oil in the well flows into the inlet chamber 101 through the inlet of valve seat 1, and then into the sealing chamber through the inlet hole 10 at the bottom of the sealing chamber. When the oil pressure reaches a first threshold, the oil pushes the sealing slide plate 6 upward. When the height of the sealing slide plate 6 is higher than the height of the outlet hole 9, the oil flows out from the outlet hole 9 into the outlet chamber 103, and then out through the outlet of valve seat 1. When the oil pressure is less than the first threshold, the sealing slide plate 6 moves downward and blocks the outlet hole 9, preventing the oil from flowing out of the outlet hole 9. When the oil pressure reaches a second threshold, the oil pushes the sealing block 3 upward, and the oil flows out from the gap between the sealing block 3 and valve seat 1 into the outlet chamber 103, and then out through the outlet of valve seat 1. When the oil pressure is less than the second threshold, the sealing block 3 moves downward and comes into close contact with the valve seat 1, preventing the oil from flowing out from the gap between the sealing block 3 and valve seat 1. With this structure, both the sealing slide plate 6 and the sealing block 3 can move automatically to open or close the oil flow channel according to the real-time oil pressure and flow rate. This allows the main valve body 100 to intermittently start or close based on the real-time oil pressure and flow rate, eliminating the need to set a fixed opening time, thus improving operational convenience and mining efficiency. Secondly, the position sensor 8 can detect the position of the upper plate 16, allowing the calculation of the oil pressure and flow rate within the corresponding time period based on the time the upper plate 16 is detected by the position sensor 8.

[0074] In some embodiments of this application, such as Figure 1 , Figure 2 and Figure 3As shown, the cover plate assembly 2 includes a cover plate 21 and an intermediate plate 22. The intermediate plate 22 is mounted on the valve seat 1, and the cover plate 21 is mounted on the intermediate plate 22. The cover plate 21 and the intermediate plate 22 form an upper chamber 23. The valve seat 1 is also provided with a side oil flow channel 11 and an oil drain hole 13. The intermediate plate 22 is provided with an auxiliary oil flow channel 12. The lower end of the side oil flow channel 11 is connected to the oil inlet chamber 101, the upper end of the side oil flow channel 11 is connected to the first end of the auxiliary oil flow channel 12, the upper end of the oil drain hole 13 is connected to the second end of the auxiliary oil flow channel 12, and the lower end of the oil drain hole 13 is connected to the oil outlet chamber 103. With this structure, the side oil flow channel 11, auxiliary oil flow channel 12, and drain hole 13 can form a bypass path. When the oil pressure is low and fails to lift the sealing slide plate 6 to the position of the oil outlet hole 9, the oil can flow out to the oil outlet chamber 103 through the side oil flow channel 11, auxiliary oil flow channel 12, and drain hole 13. Thus, the oil flowing out from the side oil flow channel 11, auxiliary oil flow channel 12, and drain hole 13 can be used to detect whether the oil well has produced oil, facilitating the assessment of the well's oil production status by operators. Simultaneously, the oil flowing out from the side oil flow channel 11, auxiliary oil flow channel 12, and drain hole 13 can be used for preliminary measurement of oil pressure and flow rate, facilitating accurate analysis of changes in oil pressure and flow rate. In addition, the side oil flow channel 11, the auxiliary oil flow channel 12 and the drain hole 13 can provide a pressure relief channel for the oil, so as to prevent high pressure oil from accumulating in the oil outlet chamber 103 for a long time and causing damage to the main valve body 100.

[0075] In some embodiments of this application, the drain hole 13 is located on the pressure plate, a sealing gasket is provided between the intermediate plate 22 and the valve seat 1, and mounting holes are provided on both sides of the cover plate 21, the intermediate plate 22 and the valve seat 1. Bolts pass through the mounting holes on the cover plate 21, the intermediate plate 22 and the valve seat 1 in sequence, extend out and are connected to nuts to lock the cover plate 21 and the intermediate plate 22 onto the valve seat 1.

[0076] In some embodiments of this application, the intermediate plate 22 is a circular plate, and the outer periphery of the intermediate plate 22 is provided with positioning steps, and the cover plate 21 is installed on the positioning steps.

[0077] In some embodiments of this application, the auxiliary oil flow channel 12 on the intermediate plate 22 has a hole structure. During processing, a rectangular groove can be machined on the lower surface of the intermediate plate 22 first, and then a long groove can be machined at the bottom of the rectangular groove. After that, a plate with two through holes is welded into the rectangular groove, so that the long groove and the two holes can form the auxiliary oil flow channel 12. At the same time, the intermediate plate 22 is provided with a through hole for inserting the slide rod 7. In order to prevent the long groove and the through hole from communicating, an annular surrounding plate can be set in the long groove. The slide rod 7 is sleeved inside the annular surrounding plate, and an arc-shaped channel for oil flow is formed between the outer peripheral surface of the annular surrounding plate and the inner wall of the long groove.

[0078] In some embodiments of this application, such as Figure 1 and Figure 4 As shown, an elastic sealing assembly 14 is provided inside the oil outlet chamber 103. The elastic sealing assembly 14 includes a bracket 141, a sealing plug 142, a third spring 143, and a first pressure sensor 144. The bracket 141 is fixed to the inner wall of the oil outlet chamber 103, and the sealing plug 142 is used to seal the oil drain hole 13. The bracket 141 has a sliding hole, and the sealing plug 142 slides through the sliding hole. The third spring 143 is pressed between the sealing plug 142 and the bracket 141. The first pressure sensor 144 is installed on the bracket 141 and is positioned opposite to the lower end of the sealing plug 142. With this structure, when the oil pressure is low, the sealing plug 142 is pressed against the oil drain hole 13 under the elastic action of the third spring 143, so that the sealing plug 142 can block the oil drain hole 13 and prevent oil leakage. When the oil pressure is greater than the elastic force applied by the third spring 143, the sealing plug 142 moves away from the drain hole 13 under the action of the oil pressure, so that the oil can flow out from the gap between the sealing plug 142 and the drain hole 13. When the sealing plug 142 moves away from the drain hole 13, the sealing plug 142 can press against the first pressure sensor 144, so that the first pressure sensor 144 can indirectly detect the oil pressure. Based on the time it takes for the first pressure sensor 144 to detect the pressure, the flow rate of the oil flowing out through the drain hole 13 can be obtained.

[0079] It is understood that the main valve body 100 of this application is a pre-operating valve of an intermittent valve assembly. It does not require precise detection of the oil pressure and flow rate; only a rough measurement of the oil pressure and flow rate is needed to provide reference values ​​for subsequent processes. Specifically, based on the spring type and elastic modulus, and the initial positions of the position sensor 8 and pressure sensor, this application can obtain a rough value of the oil pressure when the position sensor 8 and pressure sensor detect signals through experiments and calculations. Similarly, based on the size of the oil flow orifice and the time it takes for the position sensor 8 and pressure sensor to detect signals, a rough value of the oil flow rate can be obtained through experiments and calculations.

[0080] In some embodiments of this application, the bracket 141 includes an annular frame, which can be screwed onto the lower surface of the pressure plate or welded to the lower surface of the pressure plate. A base plate is provided at the bottom of the annular bracket 141, a third spring 143 is mounted on the base plate, and a first pressure sensor 144 is mounted on the base plate and located inside the third spring 143. A crossbeam is provided in the middle of the annular bracket 141, and a sliding hole is provided on the crossbeam, into which a sealing plug 142 is slidably installed.

[0081] In some embodiments of this application, the sealing plug 142 includes an upper plug, a connecting rod, and a lower plate. A third spring 143 is pressed between the lower plate and the bottom plate. The connecting rod is inserted into a sliding hole and has a clearance fit with the sliding hole. An annular rubber sleeve is provided on the outer circumferential surface of the upper plug. The upper plug and the upper end of the connecting rod are threaded together, and the lower end of the connecting rod is welded to the lower plate. During processing, the third spring 143 can be placed on the bottom plate of the annular frame first, then the connecting rod and the lower plate can be placed on the third spring 143. After that, the crossbeam is installed into the annular frame through the connecting rod and welded into the annular frame. Then, the upper plug is threaded to the connecting rod. Finally, the annular frame is welded to the lower surface of the pressure plate.

[0082] In some embodiments of this application, such as Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, multiple slide rods 7 are provided, and these slide rods 7 are arranged sequentially along the circumference of the sealing slide plate 6. Each slide rod 7 is fitted with a first spring 4 and a second spring 5. The sealing block 3 has multiple first through holes, each corresponding to one of the slide rods 7. The intermediate plate 22 has multiple second through holes, each corresponding to one of the slide rods 7. This structure, by connecting the sealing slide plate 6 with multiple slide rods 7, improves the stability of the sealing slide plate 6's movement. By limiting and guiding the sealing block 3 with multiple slide rods 7, the stability and positioning accuracy of the sealing block 3's movement are improved.

[0083] In some embodiments of this application, four slide rods 7 are provided, and the four slide rods 7 are arranged sequentially along the circumference of the sealing slide plate 6. Each slide rod 7 is fitted with a first spring 4 and a second spring 5. The sealing block 3 is provided with four first through holes, and the four first through holes correspond one-to-one with the four slide rods 7. The intermediate plate 22 is provided with four second through holes, and the four second through holes correspond one-to-one with the four slide rods 7.

[0084] In some embodiments of this application, such as Figure 1 , Figure 2 and Figure 3As shown, a fourth spring 15 is also fitted onto the slide rod 7, located between the upper plate 16 and the intermediate plate 22; a second pressure sensor 17 is also provided on the upper surface of the sealing block 3, and the second pressure sensor 17 is positioned opposite to the intermediate plate 22. With this structure, the fourth spring 15 provides additional elastic support between the upper plate 16 and the intermediate plate 22, allowing the sliding structure composed of the upper plate 16, slide rod 7, and sealing slide plate 6 to press against the fourth spring 15. This balances the weight of the components such as the upper plate 16, slide rod 7, and sealing slide plate 6, improving measurement accuracy. Simultaneously, the first spring 4, second spring 5, and third spring 143 work together to improve the stability of the sliding structure composed of the upper plate 16, slide rod 7, and sealing slide plate 6. Furthermore, when the oil pushes up the sealing block 3, the sealing block 3 moves towards the intermediate plate 22. At this time, the second pressure sensor 17 can press against the lower surface of the intermediate plate 22 to detect pressure, thus allowing the second pressure sensor 17 to detect the oil pressure.

[0085] In some embodiments of this application, the first pressure sensor 144 and the second pressure sensor 17 are both common pressure sensors, such as strain gauge pressure sensors, piezoresistive pressure sensors, etc.

[0086] In some embodiments of this application, such as Figure 1 As shown, multiple position sensors 8 are provided along the length of the slide bar 7. With this structure, the multiple position sensors 8 are distributed along the length of the slide bar 7, enabling segmented detection of the state of the upper plate 16 at different height positions. When the upper plate 16 moves with the slide bar 7, multiple position sensors 8 can be triggered sequentially, generating multiple position signals. These signals record the time points when the upper plate 16 reaches or leaves a specific height, allowing not only determination of whether the upper plate 16 has moved, but also differentiation of the magnitude and stages of its displacement. By analyzing these time point sequences, the change in the movement speed of the upper plate 16 can be calculated, and thus the change process of the oil pressure driving its movement can be inferred.

[0087] In some embodiments of this application, such as Figure 8As shown, the intermittent valve assembly also includes a main inlet pipeline, a first branch pipeline, a second branch pipeline, a third branch pipeline, and a main outlet pipeline; the main valve body 100 is installed on the main inlet pipeline, one end of the first branch pipeline, the second branch pipeline, and the third branch pipeline are all connected to the main inlet pipeline, and the other end of the first branch pipeline is connected to the main outlet pipeline; the first branch pipeline is provided with a first switching valve 201, a first oil reservoir 202, and a second switching valve 203 in sequence, the second branch pipeline is provided with a third switching valve 204, a multiphase flow meter 205, a fourth switching valve 206, a second oil reservoir 207, and a fifth switching valve 208 in sequence, the second branch pipeline is also provided with a diversion branch, one end of the diversion branch is connected between the multiphase flow meter 205 and the fourth switching valve 206, the other end of the diversion branch is connected to the main outlet pipeline, the diversion branch is provided with a sixth switching valve 209, and the third branch pipeline is provided with a seventh switching valve 210. With this structure, when the first pressure sensor 144 detects pressure, it can control the first switch valve 201 on the first branch pipeline to open, so that the oil can flow through the first branch pipeline to the first oil storage tank 202. At this time, the oil pressure and flow rate are relatively small, so the oil needs to be stored first. When the oil is stored to a certain amount, it can control the second switch valve 203 to open, so that the oil in the first oil storage tank 202 can flow to the main outlet pipeline.

[0088] When position sensor 8 detects the upper plate 16, it can control the opening of the third switch valve 204 on the second branch pipeline, allowing oil to flow through the second branch pipeline to the multiphase flow meter 205. At this time, the multiphase flow meter 205 can obtain the oil flow rate, and then control the opening of the fourth switch valve 206 or the sixth switch valve 209 based on the oil flow rate. Specifically, when the oil flow rate is less than the threshold, the fourth switch valve 206 is controlled to open, and the oil is first stored in the second oil storage tank 207. When the oil is stored to a certain amount, the fifth switch valve 208 is controlled to open, allowing the oil in the second oil storage tank 207 to flow into the main outlet pipeline. When the oil flow rate is greater than the threshold, the sixth switch valve 209 is controlled to open, and the oil flows directly into the main outlet pipeline through the branch pipeline.

[0089] Specifically, when the second pressure sensor 17 detects pressure, it can control the seventh switching valve 210 on the third branch pipeline to open, allowing the oil to flow directly to the main outlet pipeline via the third branch pipeline. In this way, the valve body can be intermittently opened and closed based on the real-time oil flow rate, improving the automation level of the intermittent valve assembly.

[0090] In some embodiments of this application, the first switching valve 201, the second switching valve 203, the third switching valve 204, the fourth switching valve 206, the fifth switching valve 208, the sixth switching valve 209, and the seventh switching valve 210 can all be solenoid valves.

[0091] In some embodiments of this application, a liquid level sensor can be installed in both the first oil storage tank 202 and the second oil storage tank 207 to detect the liquid level height of the oil. When the liquid level height of the oil in the first oil storage tank 202 exceeds a threshold, the second switch valve 203 is controlled to open. When the liquid level height of the oil in the second oil storage tank 207 exceeds the threshold, the fifth switch valve 208 is controlled to open.

[0092] Example 2:

[0093] This invention also provides a metering method for an intermittent valve assembly with metering function, including an intermittent valve assembly with metering function as provided in Embodiment 1 above. The intermittent valve assembly includes a main valve body, the main valve body includes a valve seat and a cover plate assembly mounted on the valve seat, the cover plate assembly is provided with an upper chamber, and the upper chamber is provided with an upper plate and a position sensor.

[0094] The methods include:

[0095] The position of the upper plate is detected by a position sensor, and the time point of each detection is recorded;

[0096] When the position sensor detects the position of the upper plate, the first time point is recorded;

[0097] Record the second time point when the position sensor fails to detect the position of the upper plate;

[0098] Based on the time difference between the first and second time points, calculate the oil pressure and flow rate of the oil between the first and second time points.

[0099] The beneficial effects of Embodiment 2 and its various implementations of the present invention can be found in the analysis of the beneficial effects of Embodiment 1 and its various implementations, and will not be repeated here.

[0100] Understandably, when the sealing slide plate slides, it needs to overcome the elastic force of the first spring and the frictional force between the sealing slide plate and the inner wall of the sealing cavity. When the position sensor detects the position of the upper plate, the distance the upper plate has moved can be calculated based on the initial height of the position sensor and the upper plate. Then, based on the distance the upper plate has moved, the elastic force of the first spring and the frictional force between the sealing slide plate and the inner wall of the sealing cavity can be calculated, thus obtaining the oil pressure. Simultaneously, based on the time difference between the first and second time points and the diameter of the oil outlet, the oil flow rate can be calculated. The oil pressure and flow rate calculated here are approximate values.

[0101] In some embodiments of this application, two position sensors are provided along the length of the slide rod inside the valve seat, and the two position sensors are a first position sensor and a second position sensor, respectively, with the first position sensor located close to the upper plate.

[0102] The position of the upper plate is detected by a position sensor, and the time point of each detection is recorded, specifically including:

[0103] When the first position sensor detects the position of the upper plate and the second position sensor does not detect the position of the upper plate, record the initial time point when the first position sensor detects the position of the upper plate and the termination time point when the first position sensor does not detect the position of the upper plate. Based on the time difference between the initial time point and the termination time point, calculate the oil pressure and flow rate of the oil between the initial time point and the termination time point.

[0104] When both the first position sensor and the second position sensor detect the position of the upper plate, record the first initial time point when the first position sensor detects the position of the upper plate, record the first termination time point when the first position sensor does not detect the position of the upper plate, record the second initial time point when the second position sensor detects the position of the upper plate, record the second termination time point when the second position sensor does not detect the position of the upper plate, and calculate the oil pressure and flow rate of the oil between the first initial time point and the second initial time point based on the time difference between the first initial time point and the second initial time point, and record them as the first oil data;

[0105] Based on the time difference between the second initial time point and the second termination time point, calculate the oil pressure and flow rate of the oil between the second initial time point and the second termination time point, and record them as the second oil data.

[0106] Based on the time difference between the second termination time point and the first termination time point, calculate the oil pressure and flow rate of the oil between the second termination time point and the first termination time point, and record them as the third oil data.

[0107] Based on the first, second, and third oil data, curves showing the changes in oil pressure and flow rate are derived. Using this method, by recording the precise time points when the two position sensors are triggered and de-activated sequentially, the continuous movement of the slide bar driving the upper plate is divided into multiple characteristic stages. The first oil data corresponds to the initial stage of movement when the upper plate enters the area of ​​the first sensor but has not yet reached the area of ​​the second sensor; the second oil data corresponds to the stable movement period when the upper plate is simultaneously within the detection range of both sensors; and the third oil data corresponds to the final stage of movement when the upper plate has left the area of ​​the second sensor but is still within the detection range of the first sensor. By calculating the oil pressure and flow rate for each stage, the dynamic changes in oil pressure driving the upper plate's movement can be obtained. Integrating these segmented oil data in chronological order allows for the construction of curves showing the changes in oil pressure and flow rate throughout the entire operation cycle, facilitating the adjustment of oil extraction time based on changes in oil pressure and flow rate.

[0108] In some embodiments of this application, the cover plate assembly includes a cover plate and an intermediate plate, the intermediate plate being mounted on the valve seat, the cover plate being mounted on the intermediate plate, and the cover plate and the intermediate plate forming an upper chamber;

[0109] The valve seat is also provided with a side oil flow channel and an oil drain hole. The intermediate plate is provided with an auxiliary oil flow channel. The lower end of the side oil flow channel is connected to the oil inlet chamber, the upper end of the side oil flow channel is connected to the first end of the auxiliary oil flow channel, the upper end of the oil drain hole is connected to the second end of the auxiliary oil flow channel, and the lower end of the oil drain hole is connected to the oil outlet chamber.

[0110] An elastic sealing assembly is provided inside the oil outlet chamber. The elastic sealing assembly includes a bracket, a sealing plug, a third spring, and a first pressure sensor. The bracket is fixed to the inner wall of the oil outlet chamber, and the sealing plug is used to seal the oil drain hole.

[0111] The bracket is provided with a sliding hole, the sealing plug is slidably inserted into the sliding hole, the third spring is pressed between the sealing plug and the bracket, and the first pressure sensor is installed on the bracket and is positioned opposite to the lower end of the sealing plug.

[0112] A second pressure sensor is also provided on the upper surface of the sealing block, and the second pressure sensor is positioned opposite to the intermediate plate;

[0113] The intermittent valve assembly also includes a main inlet pipe, a first branch pipe, a second branch pipe, a third branch pipe, and a main outlet pipe;

[0114] The main valve body is installed on the main inlet pipe. One end of the first branch pipe, the second branch pipe, and the third branch pipe are all connected to the main inlet pipe, and the other end is all connected to the main outlet pipe.

[0115] The first branch pipeline is equipped with a first switching valve, a first oil reservoir and a second switching valve in sequence. The second branch pipeline is equipped with a third switching valve, a multiphase flow meter, a fourth switching valve, a second oil reservoir and a fifth switching valve in sequence. The second branch pipeline is also equipped with a diversion branch. One end of the diversion branch is connected between the multiphase flow meter and the fourth switching valve, and the other end of the diversion branch is connected to the main outlet pipeline. The diversion branch is equipped with a sixth switching valve, and the third branch pipeline is equipped with a seventh switching valve.

[0116] The method also includes:

[0117] The first pressure data is obtained by detecting the first pressure sensor, and the oil pressure and flow rate of the oil are calculated based on the first pressure data.

[0118] The second pressure data is obtained by detecting the second pressure sensor, and the oil pressure and flow rate are calculated based on the second pressure data.

[0119] When the first pressure sensor detects pressure, the position sensor does not detect the position of the upper plate, and the second pressure sensor does not detect pressure, the first switch valve is controlled to open, and the third, fifth, sixth, and seventh switch valves are controlled to close. The oil flows into the first oil storage tank through the first branch pipeline. When the oil level in the first oil storage tank reaches the preset height, the second switch valve is controlled to open.

[0120] When the position sensor detects the position of the upper plate and the second pressure sensor does not detect pressure, the third switch valve is opened, and the first, second, and seventh switch valves are closed. The oil flows into the multiphase flow meter through the second branch pipeline. Based on the detection value of the multiphase flow meter and the oil pressure and flow rate change curve, the fourth or sixth switch valve is opened.

[0121] When the second pressure sensor detects pressure, it controls the seventh switching valve to open and the first, second, third, fourth, fifth, and sixth switching valves to close. Using this structure, an intelligent control system for controlling oil flow can be formed based on the detection signals from the position sensor, the first pressure sensor, and the second pressure sensor.

[0122] Specifically, firstly, when the first pressure sensor detects pressure while other sensors show no signal, it indicates that the oil pressure has overcome and released the spring preload of the elastic sealing assembly, but is still insufficient to move the sealing slide plate or sealing block. At this time, the control system determines that it is in a low-pressure, low-production stage and opens the first branch pipeline to collect and store the initial produced fluid.

[0123] Secondly, when the position sensor detects movement of the upper plate while the second pressure sensor shows no signal, it indicates that the sealing slide has begun to operate, and the oil well has entered a stable production stage with a certain level of productivity. The control system opens the second branch pipeline, guiding the oil flow to the multiphase flow meter for online metering. Simultaneously, by combining the previously established oil pressure-flow rate change curve, the economic viability of current production can be assessed. If the economic viability is poor, the fourth switch valve is opened to send the metered oil to the second oil storage tank; if it meets expectations, the sixth switch valve is opened to directly deliver the oil to the main outlet pipeline.

[0124] Finally, when the second pressure sensor detects pressure, it indicates that the oil pressure is high enough to lift the entire sealing block, and the main valve body enters the high-pressure fully open state. At this time, the system determines that it is in a high-production or pressure recovery phase, and opens the seventh switch valve to directly deliver oil to the main outlet pipeline.

[0125] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0126] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0127] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0128] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An intermittent valve assembly with metering function, characterized in that, Includes a main valve body, the main valve body including a valve seat and a cover plate assembly mounted on the valve seat, the cover plate assembly having an upper chamber; The valve seat has an oil inlet chamber, a valve seat chamber, and an oil outlet chamber connected in sequence. The valve seat chamber has a sealing block, a first spring, and a second spring. The sealing block is used to regulate the connection between the oil inlet chamber and the oil outlet chamber. The sealing block has a sealing chamber. The bottom of the sealing chamber has an oil inlet hole for communicating with the oil inlet chamber, and the side of the sealing chamber has an oil outlet hole for communicating with the oil outlet chamber. The sealed cavity is provided with a sealing slide plate and a slide rod. The sealing slide plate abuts against the inner wall of the sealed cavity. The upper cavity is provided with an upper plate and a position sensor. The sealing block and the cover plate assembly are respectively provided with a first through hole and a second through hole. The lower end of the slide rod is connected to the sealing slide plate. The upper end of the slide rod passes through the first through hole and the second through hole in sequence and extends into the upper cavity. The upper end of the slide rod is connected to the upper plate. The position sensor is used to detect the position of the upper plate. Both the first spring and the second spring are sleeved on the slide rod. The first spring is located between the sealing slide plate and the upper wall of the sealing cavity, and the second spring is located between the sealing block and the cover plate assembly. The cover plate assembly includes a cover plate and an intermediate plate, the intermediate plate is mounted on the valve seat, the cover plate is mounted on the intermediate plate, and the cover plate and the intermediate plate form the upper chamber; The valve seat is also provided with a side oil flow channel and an oil drain hole. The intermediate plate is provided with an auxiliary oil flow channel. The lower end of the side oil flow channel is connected to the oil inlet chamber, the upper end of the side oil flow channel is connected to the first end of the auxiliary oil flow channel, the upper end of the oil drain hole is connected to the second end of the auxiliary oil flow channel, and the lower end of the oil drain hole is connected to the oil outlet chamber.

2. The intermittent valve assembly with metering function according to claim 1, characterized in that, The oil outlet chamber is equipped with an elastic sealing assembly, which includes a bracket, a sealing plug, a third spring, and a first pressure sensor. The bracket is fixed to the inner wall of the oil outlet chamber, and the sealing plug is used to seal the oil drain hole. The bracket is provided with a sliding hole, the sealing plug is slidably inserted into the sliding hole, the third spring is pressed between the sealing plug and the bracket, and the first pressure sensor is installed on the bracket and is positioned opposite to the lower end of the sealing plug.

3. The intermittent valve assembly with metering function according to claim 1, characterized in that, The slide bar is provided in multiple ways, and the multiple slide bars are arranged sequentially along the circumference of the sealing slide plate. Each slide bar is fitted with the first spring and the second spring. The sealing block is provided with a plurality of first through holes, and the plurality of first through holes correspond one-to-one with the plurality of slide rods. The intermediate plate is provided with a plurality of second through holes, and the plurality of second through holes correspond one-to-one with the plurality of slide rods.

4. The intermittent valve assembly with metering function according to claim 1, characterized in that, A fourth spring is also fitted onto the slide bar, and the fourth spring is located between the upper plate and the middle plate; The upper surface of the sealing block is also provided with a second pressure sensor, which is disposed opposite to the intermediate plate.

5. The intermittent valve assembly with metering function according to claim 1, characterized in that, Multiple position sensors are provided along the length of the slide bar.

6. The intermittent valve assembly with metering function according to claim 1, characterized in that, It also includes the main inlet pipeline, the first branch pipeline, the second branch pipeline, the third branch pipeline, and the main outlet pipeline; The main valve body is installed on the main inlet pipe. One end of the first branch pipe, the second branch pipe, and the third branch pipe are all connected to the main inlet pipe, and the other end of each branch pipe is connected to the main outlet pipe. The first branch pipeline is provided with a first switching valve, a first oil reservoir and a second switching valve in sequence. The second branch pipeline is provided with a third switching valve, a multiphase flow meter, a fourth switching valve, a second oil reservoir and a fifth switching valve in sequence. The second branch pipeline is also provided with a diversion branch. One end of the diversion branch is connected between the multiphase flow meter and the fourth switching valve, and the other end of the diversion branch is connected to the main outlet pipeline. The diversion branch is provided with a sixth switching valve, and the third branch pipeline is provided with a seventh switching valve.

7. A metering method for an intermittent valve assembly with metering function, characterized in that, The intermittent valve assembly with metering function as described in any one of claims 1 to 6 includes a main valve body, the main valve body including a valve seat and a cover plate assembly mounted on the valve seat, the cover plate assembly having an upper chamber, the upper chamber having an upper plate and a position sensor. The method includes: The position of the upper plate is detected by the position sensor, and the time point of each detection is recorded; When the position sensor detects the position of the upper plate, the first time point is recorded; When the position sensor fails to detect the position of the upper plate, a second time point is recorded. Based on the time difference between the first time point and the second time point, calculate the oil pressure and flow rate of the oil between the first time point and the second time point.

8. The metering method for an intermittent valve assembly with metering function according to claim 7, characterized in that, Along the length of the slide rod inside the valve seat, there are two position sensors, and the two position sensors are a first position sensor and a second position sensor, respectively. The first position sensor is located close to the upper plate. The method of detecting the position of the upper plate using the position sensor and recording the time point of each detection specifically includes: When the first position sensor detects the position of the upper plate and the second position sensor does not detect the position of the upper plate, the initial time point when the first position sensor detects the position of the upper plate is recorded, and the termination time point when the first position sensor does not detect the position of the upper plate is recorded. Based on the time difference between the initial time point and the termination time point, the oil pressure and flow rate of the oil between the initial time point and the termination time point are calculated. When both the first position sensor and the second position sensor detect the position of the upper plate, record the first initial time point when the first position sensor detects the position of the upper plate, record the first termination time point when the first position sensor does not detect the position of the upper plate, record the second initial time point when the second position sensor detects the position of the upper plate, record the second termination time point when the second position sensor does not detect the position of the upper plate, and calculate the oil pressure and flow rate of the oil between the first initial time point and the second initial time point based on the time difference between the first initial time point and the second initial time point, and record them as the first oil data; Based on the time difference between the second initial time point and the second termination time point, calculate the oil pressure and flow rate of the oil between the second initial time point and the second termination time point, and record them as the second oil data. Based on the time difference between the second termination time point and the first termination time point, calculate the oil pressure and flow rate of the oil between the second termination time point and the first termination time point, and record them as the third oil data. Based on the first oil data, the second oil data, and the third oil data, the curves showing the changes in oil pressure and flow rate are obtained.

9. The metering method for an intermittent valve assembly with metering function according to claim 8, characterized in that, The cover plate assembly includes a cover plate and an intermediate plate, the intermediate plate is mounted on the valve seat, the cover plate is mounted on the intermediate plate, and the cover plate and the intermediate plate form the upper chamber; The valve seat is also provided with a side oil flow channel and an oil drain hole. The intermediate plate is provided with an auxiliary oil flow channel. The lower end of the side oil flow channel is connected to the oil inlet chamber, the upper end of the side oil flow channel is connected to the first end of the auxiliary oil flow channel, the upper end of the oil drain hole is connected to the second end of the auxiliary oil flow channel, and the lower end of the oil drain hole is connected to the oil outlet chamber. The oil outlet chamber is equipped with an elastic sealing assembly, which includes a bracket, a sealing plug, a third spring, and a first pressure sensor. The bracket is fixed to the inner wall of the oil outlet chamber, and the sealing plug is used to seal the oil drain hole. The bracket is provided with a sliding hole, the sealing plug is slidably inserted into the sliding hole, the third spring is pressed between the sealing plug and the bracket, and the first pressure sensor is installed on the bracket and is positioned opposite to the lower end of the sealing plug. The upper surface of the sealing block is also provided with a second pressure sensor, which is disposed opposite to the intermediate plate. The intermittent valve assembly also includes a main inlet pipe, a first branch pipe, a second branch pipe, a third branch pipe, and a main outlet pipe; The main valve body is installed on the main inlet pipe. One end of the first branch pipe, the second branch pipe, and the third branch pipe are all connected to the main inlet pipe, and the other end of each branch pipe is connected to the main outlet pipe. The first branch pipeline is provided with a first switching valve, a first oil storage tank and a second switching valve in sequence. The second branch pipeline is provided with a third switching valve, a multiphase flow meter, a fourth switching valve, a second oil storage tank and a fifth switching valve in sequence. The second branch pipeline is also provided with a diversion branch. One end of the diversion branch is connected between the multiphase flow meter and the fourth switching valve, and the other end of the diversion branch is connected to the main outlet pipeline. The diversion branch is provided with a sixth switching valve, and the third branch pipeline is provided with a seventh switching valve. The method further includes: The first pressure data is obtained by detecting the first pressure sensor, and the oil pressure and flow rate of the oil are calculated based on the first pressure data. The second pressure data is obtained by detecting the second pressure sensor, and the oil pressure and flow rate of the oil are calculated based on the second pressure data. When the first pressure sensor detects pressure, the position sensor does not detect the position of the upper plate, and the second pressure sensor does not detect pressure, the first switching valve is controlled to open, and the third, fifth, sixth, and seventh switching valves are controlled to close. The oil flows into the first oil storage tank through the first branch pipeline. When the oil level in the first oil storage tank reaches a preset height, the second switching valve is controlled to open. When the position sensor detects the position of the upper plate and the second pressure sensor does not detect pressure, the third switching valve is controlled to open, and the first, second, and seventh switching valves are controlled to close. The oil flows into the multiphase flow meter through the second branch pipeline. Based on the detection value of the multiphase flow meter and the oil pressure and flow rate change curve, the fourth or sixth switching valve is controlled to open. When the second pressure sensor detects pressure, it controls the seventh switch valve to open and controls the first, second, third, fourth, fifth, and sixth switch valves to close.

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