Fixed oil nozzle capable of being automatically switched and easy to replace and throttling method

Abstract

The invention discloses a fixed oil nozzle capable of being automatically switched and easy to replace, and belongs to the technical field of automation of oil and gas exploitation equipment. The device comprises a right sealing disc cover, a right sealing disc, a replaceable sealing cover, a pressure relief screw, a fixed oil nozzle switching sheath, a main shell, a driving rod I and the like. The function of automatically switching the fixed oil nozzles with different specifications is achieved without shutdown, and the problem that an existing fixed oil nozzle only has one specification and cannot adapt to sudden change and fluctuation of working conditions in the oil and gas exploitation process is solved; the function of replacing and maintaining the fixed oil nozzle without shutdown is achieved, and the problem that an existing fixed oil nozzle cannot work normally due to failure is solved; the safety of replacement and maintenance of the fixed oil nozzle is achieved, and the problems that when an existing fixed oil nozzle is replaced with oil nozzles of other specifications, complex disassembly and assembly are needed, procedures are tedious, and risks exist are solved. And the function of fully closing the fixed oil nozzle is achieved, and the problem that an existing fixed oil nozzle cannot interrupt fluid conveying is solved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploitation and gas storage equipment automation, and in particular to an automatically switchable and easily replaceable fixed oil nozzle and throttling method. Background Art

[0002] In the process of oil and gas production and gas storage injection and production, production manifolds are usually used to achieve the functions of throttling and pressure reduction and production allocation. Through the finely designed fixed aperture, the fixed nozzle plays a key role in controlling the gas and liquid flow and stabilizing the wellhead pressure in the production manifold, effectively avoiding damage to the oil well caused by over-exploitation, ensuring the production efficiency and safety of the oil well, and preventing potential production accidents. Therefore, the reasonable and effective configuration of the fixed nozzles in the throttling and pressure reduction manifold is of great significance to improving the production efficiency, safety and sustainability of the oil well.

[0003] The existing fixed nozzle has a simple design, stable structure, low cost, and a fixed flow setting. It is suitable for occasions requiring a fixed flow and has a certain degree of predictability and controllability. However, in the use of oil and gas well ground testing and oil and gas well production processes, the fixed nozzle still has the following shortcomings.

[0004] (1) The existing fixed oil nozzle device can only install fixed oil nozzles of one specification and cannot be quickly adjusted according to changes in working conditions and operating requirements.

[0005] (2) When replacing a fixed oil nozzle of other specifications with an existing fixed oil nozzle device, the device needs to be disassembled and assembled in a complicated manner, which is time-consuming and involves certain operational risks.

[0006] (3) When replacing the fixed oil nozzle of the existing fixed oil nozzle device, it is necessary to close the gate valves upstream and downstream of the fixed throttle valve to release the pressure in the fixed oil nozzle before the fixed oil nozzle can be replaced, which makes the overall process complicated and affects the normal production efficiency.

[0007] (4) The existing fixed nozzle device cannot achieve the full closing function when the flow rate or pressure is small, and the upstream and downstream gate valves need to cooperate to achieve full closing, resulting in cumbersome processes and complex equipment.

[0008] Therefore, in order to effectively solve the shortcomings of the existing fixed throttle valve during use, it is urgent to invent a new type of multifunctional fixed oil nozzle to meet the needs of oil and gas well production. Due to factors such as oil well production and pressure changing over time, it is necessary to flexibly and quickly adjust the flow channel size or area of ​​the fixed oil nozzle to meet the needs of changing working conditions and achieve the purpose of precise throttling. Summary of the invention

[0009] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a fixed oil nozzle that can be automatically switched and easily replaced. The present invention drives a driving rod I through a DC motor to make the fixed oil nozzle switching sleeve axially move, thereby achieving the purpose of switching the fixed oil nozzle. Since two specifications of fixed oil nozzles are installed in the fixed oil nozzle switching sleeve, the fixed oil nozzle suitable for the working condition can be quickly switched to work according to the working condition needs, solving the problem that the traditional fixed throttle valve has only one specification of fixed oil nozzle and cannot adapt to the sudden change of working conditions in oil and gas production and needs to quickly replace the oil nozzle, and the problem that the upstream and downstream valves need to be closed when replacing fixed oil nozzles of different specifications, resulting in a decrease in production efficiency; the present invention can replace the fixed oil nozzle by removing the replaceable sealing cover. When the fixed oil nozzle needs to be replaced due to erosion or other reasons, the replaceable sealing cover can be opened to take out the fixed oil nozzle and replace it, solving the problem that the traditional fixed throttle valve has a cumbersome and lengthy process when replacing the fixed oil nozzle, and needs to be disassembled from the outside to the inside, resulting in great difficulty in assembly; when the fixed oil nozzle needs to be replaced or maintained, the DC motor drives the driving rod I to switch the fixed oil nozzle The sleeve moves axially, so that the other fixed oil nozzle is in a working state. At this time, the replaceable sealing cover can be opened to replace or maintain the fixed oil nozzle, which solves the problem that during the replacement of the fixed oil nozzle of the traditional fixed throttle valve, the gate valves upstream and downstream of the fixed throttle valve need to be closed to relieve the pressure in the fixed throttle valve before the fixed oil nozzle can be replaced, and the oil and gas production efficiency is improved; the present invention drives the driving rod I by a DC motor to make the fixed oil nozzle switching sleeve axially move, so as to achieve the purpose of full closing. Since two specifications of fixed oil nozzles are installed in the fixed oil nozzle switching sleeve, there is a throttling section between the two fixed oil nozzles, which can be quickly changed to a fully closed state according to the working conditions, solving the problem that the traditional fixed throttle valve cannot achieve a fully closed state when the throttling is abnormal; mechanical auxiliary positioning is performed on the right sealing disk and the bearing seat through positioning protrusions, which reduces the difficulty of electrical control for precise positioning and solves the problem that the fixed oil nozzle cannot be accurately positioned in the middle of the flow channel when switching;

[0010] The objective of the present invention is achieved through the following technical solutions: a fixed oil nozzle that can be automatically switched and easily replaced, characterized in that it includes a right sealing disc cover, a hollow servo DC motor, a replaceable sealing cover I, a pressure relief screw I, a driving rod I, a right sealing disc, a packing gland I, a packing I, a main housing, a fixed oil nozzle I, a packing II, a packing gland II, a driving rod cover I, a switching mechanism, a fixed oil nozzle switching sleeve, a fixed oil nozzle II, a left sealing disc, a replaceable sealing cover II, and a pressure relief screw II, wherein the switching mechanism includes a bearing seat cover, a thrust bearing I, a transmission worm wheel, a transmission worm, a thrust bearing II, a bearing seat, a DC motor, an electric drive connection device, a manual wheel, and a driving rod II;

[0011] The hollow servo DC motor is connected to the right sealing disc cover by bolts, the hollow servo DC motor is connected to the external connection thread I of the driving rod I by threading, the hole IV on the driving rod I is connected to the threaded connection hole XVIII on the fixed oil nozzle switching sleeve by planting wire, the fixed oil nozzle I, the fixed oil nozzle II and the threaded connection hole XVII on the fixed oil nozzle switching sleeve are connected by threading, the packing gland I, the packing I, the packing II and the packing gland II are coaxial, the packing gland I is connected to the threaded connection hole VIII on the main shell by threading, the packing I is placed The packing II is placed in the hole VIII on the main shell, the packing gland II is connected to the threaded hole V on the main shell by threads, the hole V on the right sealing disk is connected to the threaded hole VII on the main shell by planting wires, the hole VI on the right sealing disk is connected to the hole I on the right sealing disk cover by bolts, the threaded hole I on the replaceable sealing cover is connected to the threaded hole III on the right sealing disk by screws, the pressure relief screw I is connected to the threaded hole II on the replaceable sealing cover by threads, and the The through hole XIII on the left sealing disk is connected to the threaded connection hole IV on the main housing by planting wires, the eyelet XI on the bearing seat is connected to the eyelet XII on the left sealing disk by bolts, the eyelet IX on the bearing seat cover is connected to the threaded connection hole XIV on the bearing seat by planting wires, the external connection thread II on the drive cover I is connected to the threaded connection hole X on the bearing seat cover by threads, the electric drive connection device is connected to the threaded connection hole XII on the bearing seat cover by planting wires, the DC motor is connected to the electric drive connection device by bolts, and the external thread on the drive rod II is connected to the threaded connection hole XII on the bearing seat cover. The threaded connection hole XIII on the transmission worm wheel is connected by threads, the thrust bearing I is placed on the boss I of the transmission worm wheel, the thrust bearing II is placed on the boss II of the transmission worm wheel, the thrust bearing I, the transmission worm wheel and the thrust bearing II assembly are placed in the channel I of the bearing seat, the threaded connection hole XV on the drive rod II is connected by threading, the threaded connection hole XX on the replaceable sealing cover II is connected to the threaded connection hole XIX on the left sealing disk by screws, and the pressure relief screw II is connected to the threaded connection hole XXI on the replaceable sealing cover II by threads.

[0012] The right sealing disk cover is provided with an eyelet I, a positioning boss I, and an eyelet II; the replaceable sealing cover I is provided with a threaded connection hole I, a threaded connection hole II, and an eyelet III; the right sealing disk is provided with an eyelet V, a replacement cavity I, a threaded connection hole III, an eyelet VI, and a switching channel I; the replacement cavity I is used to place the replaceable sealing cover I, and the switching channel I is coaxial with the switching channel II on the main shell.

[0013] The driving rod I is provided with an eyelet IV and an external connecting thread I, the driving rod cover I is provided with an external connecting thread II, and the driving rod II is provided with an external connecting thread III and a threaded connecting hole XV.

[0014] The main shell is provided with a threaded connection hole IV, a threaded connection hole V, an eyelet VII, a switching channel II, a threaded connection hole VI, a sealing ring installation groove I, a flow channel I, a threaded connection hole VII, a threaded connection hole VIII, an eyelet VIII, a threaded connection hole IX, and a sealing ring installation groove II.

[0015] The bearing seat is provided with a threaded connection hole XIV, a channel I, an eyelet XI, and a positioning boss II. The bearing seat cover is provided with an eyelet IX, a threaded connection hole X, an eyelet X, a threaded connection hole XI, and a threaded connection hole XII. The eyelet X is coaxial with the transmission worm. The transmission worm wheel is provided with a threaded connection hole XIII, a boss I, and a boss II.

[0016] The fixed oil nozzle switching sleeve is provided with a threaded connection hole XVI, a threaded connection hole XVII, a sealing surface, and a threaded connection hole XVIII. The fixed oil nozzle switching sleeve is placed in the switching channel II on the main shell. The fixed oil nozzle switching sleeve can move in the switching channel I of the right sealing disk, the switching channel II of the main shell, and the switching channel III of the left sealing disk.

[0017] The left sealing disk is provided with a switching channel III, an eyelet XII, a threaded connection hole XIX, a replacement chamber II, and an eyelet XIII. The switching channel III is coaxial with the switching channel II of the main shell. The replacement chamber II is used to place a replaceable sealing cover II. The replaceable sealing cover II is provided with a threaded connection hole XX, a threaded connection hole XXI, and an eyelet XIV.

[0018] The present invention also provides a throttling method, using the above-mentioned automatically switchable and easily replaceable fixed oil nozzle, I, a method for replacing or maintaining abnormal fixed oil nozzles I and II, comprising the following steps:

[0019] S1. Monitor whether fixed nozzle I or fixed nozzle II is abnormal.

[0020] Use instruments such as flowmeters or pressure sensors to monitor whether the fluid flow or pressure drop is normal. If the fluid flow fluctuates significantly, or the outlet pressure increases or decreases significantly when the inlet pressure remains unchanged, it means that the fixed oil nozzle in operation has become abnormal and needs to be replaced or maintained.

[0021] S2, switch to different specifications of fixed oil nozzle I or fixed oil nozzle II for operation

[0022] A total of two specifications of fixed oil nozzles can be placed, namely fixed oil nozzle I and fixed oil nozzle II. If one of the fixed oil nozzles is abnormal, it will switch to the other fixed oil nozzle for operation. The following example takes the abnormality of fixed oil nozzle I as an example. When fixed oil nozzle I needs to be replaced, the DC motor starts, and drives the drive rod II to move axially by operating the transmission worm and the transmission worm gear. At the same time, the hollow servo DC motor starts, drives the drive rod I to move axially, and then drives the fixed oil nozzle switching sleeve to move axially, so as to switch fixed oil nozzles II of different specifications for operation. When the fixed oil nozzle switching sleeve moves, the fixed oil nozzle switching sleeve will no longer move when it contacts the positioning boss I on the right sealing disc cover or the positioning boss II on the bearing seat, so as to perform mechanical auxiliary positioning, and is positioned together through the program positioning on the DC motor and the hollow servo DC motor;

[0023] S3. Replacement and maintenance

[0024] At this time, the abnormal fixed oil nozzle I has been moved under the replaceable sealing cover I. At this time, the pressure relief screw I is opened to release the pressure, and then the replaceable sealing cover I is opened to replace or maintain the abnormal fixed oil nozzle I. After the replacement or maintenance is completed, the replaceable sealing cover I is installed and the pressure relief screw I is closed to complete the replacement or maintenance work;

[0025] II. Switch between fixed nozzles of different specifications I and II

[0026] S1. Check whether the current fixed nozzle meets the working conditions

[0027] By using instruments such as flow meters or pressure sensors, check whether the fluid flow or pressure drop meets the needs of the current working conditions. If it does not meet the requirements, continue to work. If not, switch to a fixed nozzle that meets the current working conditions to work;

[0028] S2. Judgment

[0029] According to the needs of the current working conditions, determine the required working flow range, and then determine what specifications of fixed nozzle I to use;

[0030] S3. Inspection

[0031] According to the judgment, the required specification of the fixed oil nozzle is obtained, and it is checked whether the device of the present invention contains the fixed oil nozzle of the specification. If not, it needs to be replaced. If so, it can be switched to the fixed oil nozzle I or the fixed oil nozzle II;

[0032] S4. Replacement

[0033] Move the fixed oil nozzles I and II of unnecessary specifications to under the replaceable sealing cover I or replaceable sealing cover II, open the replaceable sealing cover I or replaceable sealing cover II, and replace the fixed oil nozzles I and II of unnecessary specifications with the fixed oil nozzles of required specifications. After the replacement is completed, install the replaceable sealing cover I or replaceable sealing cover II to complete the replacement work;

[0034] S5, Switch

[0035] The device can hold two specifications of fixed oil nozzles I and II. When the fixed oil nozzle needs to be switched, the DC motor and the hollow servo DC motor are started, and the driving worm and the driving worm gear are operated to drive the driving rod I and the driving rod II to move axially, thereby driving the fixed oil nozzle switching sleeve to move axially, thereby switching the fixed oil nozzles I and II of different specifications to work. When the fixed oil nozzle switching sleeve moves, the fixed oil nozzle switching sleeve will no longer move when it contacts the positioning boss I on the right sealing disc cover or the positioning boss II on the bearing seat, so as to perform mechanical auxiliary positioning, and is positioned together through the programs set on the DC motor and the hollow servo DC motor;

[0036] III. Switch the fixed oil nozzle to the fully closed state

[0037] S1. Check whether the current fixed nozzle throttling fluid working condition is abnormal

[0038] By using instruments such as flow meters or pressure sensors, monitor whether the fluid flow or pressure drop is normal. If the fluid flow fluctuates significantly, or the outlet pressure increases or decreases when the inlet pressure remains unchanged, it means that the fixed nozzle throttling fluid condition is abnormal and needs to be terminated immediately;

[0039] S2, switch to full off state

[0040] The device can hold two specifications of fixed oil nozzles, namely fixed oil nozzle I and fixed oil nozzle II. There is a sealing surface between the two specifications of fixed oil nozzles. When the fixed oil nozzle needs to be fully closed, the DC motor and the hollow servo DC motor are started, and the driving worm and the driving worm gear are operated to drive the driving rod I and the driving rod II to move axially, thereby driving the fixed oil nozzle switching sleeve to move axially, thereby moving the sealing surface to the flow channel I. When the fixed oil nozzle switching sleeve moves, it is positioned by the program set on the DC motor and the hollow servo DC motor.

[0041] The beneficial effects of the present invention are:

[0042] (1) Equipped with two sets of fixed nozzles of different specifications, the fixed nozzles of different specifications can be quickly switched to adapt to sudden changes in working conditions during oil and gas production.

[0043] (2) The replacement method of the fixed oil nozzle is simplified, the difficulty of disassembly and assembly is reduced, and the assembly time is saved.

[0044] (3) During the switching process of the fixed oil nozzle, there is no need to stop production, ensuring normal production efficiency.

[0045] (4) The function of fully closing the fixed throttle valve is realized, simplifying the operating process.

[0046] (5) Packing seals and pressure relief holes are arranged inside the switch, forming a systematic sealing protection, which not only prevents the leakage of gas and liquid underground, but also protects the parts in the installation cavity of the switching device from being affected by the high-pressure erosion of liquid and gas, reduces the wear and damage of the parts caused by the erosion of gas and liquid, and ensures the construction safety of the workers.

[0047] (6) The use of mechanical assisted positioning reduces the difficulty of electronic control. When switching, the fixed oil nozzle can be placed in the center of the flow channel to avoid the situation where the fixed oil nozzle is misaligned after switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a partial cross-sectional schematic diagram of the present invention;

[0049] Figure 2 A three-dimensional schematic diagram of the right sealing disc cover of the present invention;

[0050] Figure 3 A three-dimensional schematic diagram of a replacement cover 1 of the present invention;

[0051] Figure 4 A three-dimensional schematic diagram of a driving rod 1 of the present invention;

[0052] Figure 5 This is a three-dimensional schematic diagram of the right sealing disk of the present invention;

[0053] Figure 6 It is a three-dimensional schematic diagram of the main shell of the present invention;

[0054] Figure 7 A three-dimensional schematic diagram of the drive rod cover of the present invention;

[0055] Figure 8 It is a three-dimensional schematic diagram and a full cross-sectional schematic diagram of the switching mechanism of the present invention;

[0056] Fig. 9 A three-dimensional schematic diagram of the bearing seat cover of the present invention;

[0057] Fig.10 A three-dimensional schematic diagram of the transmission worm gear of the present invention;

[0058] Fig.11 A three-dimensional schematic diagram of the bearing seat of the present invention;

[0059] Fig.12 A three-dimensional schematic diagram of the driving rod II of the present invention;

[0060] Fig.13 A three-dimensional schematic diagram of a fixed nozzle switching sleeve of the present invention;

[0061] Fig.14 This is a three-dimensional schematic diagram of the left sealing disk of the present invention;

[0062] Fig.15 A three-dimensional schematic diagram of the replacement cover II of the present invention;

[0063] Fig.16 It is a three-dimensional schematic diagram of the present invention;

[0064] In the figure, 1, right sealing disk cover; 101, hole I; 102, positioning boss I; 103, hole II; 2, hollow servo DC motor; 3, replacement cover I; 301, threaded connection hole I; 302, threaded connection hole II; 303, hole III; 4, pressure relief screw I; 5, driving rod I; 501, hole IV; 502, external connection thread I; 6, right sealing disk; 601, hole V; 602, replacement cavity I; 603, threaded connection hole III; 604, hole VI; 605, switching channel I; 7 packing gland I; 8, packing I; 9, main shell; 901, threaded connection hole IV; 902 threaded connection hole V; 903 , hole VII; 904, switching channel II; 905, threaded connection hole VI; 906, sealing ring installation groove I; 907, flow channel I; 908, threaded connection hole VII; 909, threaded connection hole VIII; 910, hole VIII; 911, threaded connection hole IX; 912, sealing ring installation groove II; 10, fixed oil nozzle I; 11, packing II; 12, packing gland II; 13, drive rod cover I; 1301, external connection thread II; 14, switching mechanism; 1401, bearing seat cover I; 1402, thrust bearing I; 1403, transmission worm wheel; 1404, transmission worm; 1405, thrust bearing I I; 1406, bearing seat; 1407, DC motor; 1408, electric drive connection device; 1409, manual wheel; 1410, drive rod II; 1401-1, hole IX; 1401-2, threaded hole X; 1401-3, hole X; 1401-4, threaded hole XI; 1401-5, threaded hole XII; 1403-1, threaded hole XIII; 1403-2, boss I; 1403-3, boss II; 1406-1, threaded hole XIV; 1406-2, channel I; 1406-3, hole XI; 1406-4, positioning boss II; 1410-1, external connection Connecting thread III; 1410-2, threaded connection hole XV; 15, fixed oil nozzle switching sleeve; 1501, threaded connection hole XVI; 1502, threaded connection hole XVII; 1503, sealing surface; 1504, threaded connection hole XVIII; 16, fixed oil nozzle II; 17, left sealing plate; 1701, switching channel III; 1702, eyelet XII; 1703, threaded connection hole XIX; 1704, replacement chamber II; 1705, eyelet XIII; 18, replacement cover II; 1801, threaded connection hole XX; 1802, threaded connection hole XXI; 1803, eyelet XIV; 19, pressure relief screw II; DETAILED DESCRIPTION

[0065] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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.

[0066] In the description of the present invention, it should be noted that the directions or positional relationships indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the directions or positional relationships described in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0067] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0069] like Figure 1-16 As shown, an automatically switchable and easily replaceable fixed oil nozzle is characterized in that it includes a right sealing disc cover 1, a hollow servo DC motor 2, a replaceable sealing cover I3, a pressure relief screw I4, a driving rod I5, a right sealing disc 6, a packing gland I7, a packing I8, a main housing 9, a fixed oil nozzle I10, a packing II11, a packing gland II12, a driving rod cover I13, a switching mechanism 14, a fixed oil nozzle switching sleeve 15, a fixed oil nozzle II16, a left sealing disc 17, a replaceable sealing cover II18, and a pressure relief screw II19. The switching mechanism 14 includes a bearing seat cover 1401, a thrust bearing I1402, a transmission worm wheel 1403, a transmission worm 1404, a thrust bearing II1405, a bearing seat 1406, a DC motor 1407, an electric drive connecting device 1408, a manual rotating wheel 1409, and a driving rod II1410.

[0070] In one embodiment, the hollow servo DC motor 2 is connected to the right sealing disc cover 1 by bolts, the hollow servo DC motor 2 is connected to the external connection thread I502 of the driving rod I5 by threads, the hole IV501 on the driving rod I5 is connected to the threaded connection hole XVIII1504 on the fixed oil nozzle switching sleeve 15 by planting wires, the fixed oil nozzle I10, the fixed oil nozzle II16 are connected to the threaded connection hole XVII1502 on the fixed oil nozzle switching sleeve 15 by threads, the packing gland I7, the packing I8, the packing II11, and the packing gland II12 are coaxial, and the packing gland I7 is connected to the threaded connection hole VIII909 on the main shell 9 by threads. The packing I8 is placed in the hole VIII910 on the main shell 9, the packing II11 is placed in the hole VII903 on the main shell 9, the packing gland II12 is connected to the threaded connection hole V902 on the main shell 9 by threads, the hole V601 on the right sealing disk 6 is connected to the threaded connection hole VII908 on the main shell 9 by planting wires, the hole VI604 on the right sealing disk 6 is connected to the hole I101 on the right sealing disk cover 1 by bolts, the threaded connection hole I301 on the replaceable sealing cover 3 is connected to the threaded connection hole III603 on the right sealing disk 6 by screws, and the pressure relief screw I4 is connected to the screw on the replaceable sealing cover 3. The threaded connection hole II302 is connected by threads, the through hole XIII1705 on the left sealing disk 17 is connected to the threaded connection hole IV901 on the main shell 9 by threading, the eyelet XI1406-3 on the bearing seat 1406 is connected to the eyelet XII1702 on the left sealing disk 17 by bolts, the eyelet IX1401-1 on the bearing seat cover 1401 is connected to the threaded connection hole XIV1406-1 on the bearing seat 1406 by threading, the external connection thread II1301 on the drive cover I13 is connected to the threaded connection hole X1401-2 on the bearing seat cover 1401 by threads, and the electric drive connection device 1408 is connected to the bearing seat cover 1401 The threaded connection hole XII1401-5 on the transmission worm wheel 1403 is connected by planting wires, the DC motor 1407 is connected to the electric drive connection device 1408 by bolts, the external thread 1410-1 on the driving rod II1410 is connected to the threaded connection hole XIII1403-1 on the transmission worm wheel 1403 by threads, the thrust bearing I1402 is placed on the boss I1403-2 of the transmission worm wheel 1403, the thrust bearing II1405 is placed on the boss II1403-3 of the transmission worm wheel 1403, and the thrust bearing I1402, the transmission worm wheel 1403 and the thrust bearing II1405 assembly are placed in the channel I1406-2 of the bearing seat 1406,The threaded connection hole XV1410-2 on the driving rod II1410 is connected to the threaded connection hole XX1801 on the replaceable sealing cover II18 and the threaded connection hole XIX1703 on the left sealing disk 17 by screws through a planting wire, and the pressure relief screw II19 is connected to the threaded connection hole XXI1802 on the replaceable sealing cover II18 by threads.

[0071] In one embodiment, the right sealing disk cover 1 is provided with a hole I101, a positioning boss I102, and a hole II103, the replaceable sealing cover I3 is provided with a threaded connection hole I301, a threaded connection hole II302, and a hole III303, the right sealing disk 6 is provided with a hole V601, a replacement cavity I602, a threaded connection hole III603, a hole VI604, and a switching channel I605, the replacement cavity I602 is used to place the replaceable sealing cover I3, and the switching channel I605 is coaxial with the switching channel II904 on the main shell 9.

[0072] In one embodiment, the driving rod I5 is provided with a hole IV501 and an external connecting thread I502, the driving rod cover I13 is provided with an external connecting thread II1301, and the driving rod II1410 is provided with an external connecting thread III1410-1 and a threaded connecting hole XV1410-2.

[0073] In one embodiment, the main shell 9 is provided with a threaded connection hole IV901, a threaded connection hole V902, an eyelet VII903, a switching channel II904, a threaded connection hole VI905, a sealing ring installation groove I906, a flow channel I907, a threaded connection hole VII908, a threaded connection hole VIII909, an eyelet VIII910, a threaded connection hole IX911, and a sealing ring installation groove II912.

[0074] In one embodiment, the bearing seat 1406 is provided with a threaded connection hole XIV1406-1, a channel I1406-2, a hole XI1406-3, and a positioning boss II1406-4, and the bearing seat cover 1401 is provided with a hole IX1401-1, a threaded connection hole X1401-2, a hole X1401-3, a threaded connection hole XI1401-4, and a threaded connection hole XII1401-5, the hole X1401-3 is coaxial with the transmission worm 1404, and the transmission worm wheel 1403 is provided with a threaded connection hole XIII1403-1, a boss I1403-2, and a boss II1403-3.

[0075] In one embodiment, the fixed oil nozzle switching sleeve 15 is provided with a threaded connection hole XVI1501, a threaded connection hole XVII1502, a sealing surface 1503, and a threaded connection hole XVIII1504. The fixed oil nozzle switching sleeve 15 is placed in the switching channel II904 on the main shell 9. The fixed oil nozzle switching sleeve 15 can move in the switching channel I605 of the right sealing disk 6, the switching channel II904 of the main shell, and the switching channel III1701 of the left sealing disk 17.

[0076] In one embodiment, the left sealing disk 17 is provided with a switching channel III1701, a hole XII1702, a threaded connection hole XIX1703, a replacement cavity II1704, and a hole XIII1705. The switching channel III1701 is coaxial with the switching channel II904 of the main shell 9. The replacement cavity II1704 is used to place a replaceable sealing cover II18. The replaceable sealing cover II18 is provided with a threaded connection hole XX1801, a threaded connection hole XXI1802, and a hole XIV1803.

[0077] The present invention also provides a throttling method for radial automatic switching and easy replacement of fixed oil nozzles, the steps are as follows:

[0078] I. A method for replacing or maintaining an abnormal fixed oil nozzle I10 or II16 comprises the following steps:

[0079] S1. Monitor whether the fixed nozzle I10 or the fixed nozzle II16 is abnormal.

[0080] By using instruments such as flow meters or pressure sensors, monitor whether the fluid flow or pressure drop is normal. If the fluid flow fluctuates significantly, or the outlet pressure increases or decreases significantly when the inlet pressure remains unchanged, it means that the working fixed oil nozzle 19 has an abnormality and needs to be replaced or maintained;

[0081] S2, switch to different specifications of fixed oil nozzle I10 or fixed oil nozzle II16 for operation

[0082] A total of two specifications of fixed oil nozzles can be placed, namely fixed oil nozzle I10 and fixed oil nozzle II16. If one of the fixed oil nozzles is abnormal, it will switch to the other fixed oil nozzle for operation. The following example takes the abnormality of fixed oil nozzle I10 as an example. When the fixed oil nozzle I10 needs to be replaced, the DC motor 1407 is started, and the drive rod II1410 is driven to move axially by operating the transmission worm 1404 and the transmission worm wheel 1403. At the same time, the hollow servo DC motor 2 is started, driving the drive rod I5 to move axially, and then driving the fixed oil nozzle switching sleeve 15 to move axially, thereby switching fixed oil nozzles II16 of different specifications to work. When the fixed oil nozzle switching sleeve 15 moves, the fixed oil nozzle switching sleeve 15 will no longer move when it contacts the positioning boss I102 on the right sealing disc cover 1 or the positioning boss II1406-4 on the bearing seat 1406, so as to perform mechanical auxiliary positioning, and is positioned together through the program positioning on the DC motor 1407 and the hollow servo DC motor 2;

[0083] S3. Replacement and maintenance

[0084] At this time, the abnormal fixed oil nozzle I10 has been moved under the replaceable sealing cover I3. At this time, the pressure relief screw I4 is opened to release the pressure, and then the replaceable sealing cover I3 is opened to replace or maintain the abnormal fixed oil nozzle I10. After the replacement or maintenance is completed, the replaceable sealing cover I3 is installed and the pressure relief screw I4 is closed to complete the replacement or maintenance work;

[0085] II. Switch between fixed oil nozzles I10 and II16 of different specifications

[0086] S1. Check whether the current fixed nozzle meets the working conditions

[0087] By using instruments such as flow meters or pressure sensors, check whether the fluid flow or pressure drop meets the needs of the current working conditions. If it does not meet the requirements, continue to work. If not, switch to a fixed nozzle that meets the current working conditions to work;

[0088] S2. Judgment

[0089] According to the needs of the current working conditions, determine the required working flow range, and then determine what specifications of fixed nozzle I to use;

[0090] S3. Inspection

[0091] According to the judgment, the fixed oil nozzle of the required specification is obtained, and it is checked whether the device of the present invention contains the fixed oil nozzle of the specification. If not, it needs to be replaced. If so, it can be switched to the fixed oil nozzle I10 or the fixed oil nozzle II16;

[0092] S4. Replacement

[0093] Move the fixed oil nozzles I10 and II16 of unnecessary specifications to under the replaceable sealing cover I3 or replaceable sealing cover II18, open the replaceable sealing cover I3 or replaceable sealing cover II18, and replace the fixed oil nozzles I10 and II16 of unnecessary specifications with the fixed oil nozzles of required specifications. After the replacement is completed, install the replaceable sealing cover I3 or replaceable sealing cover II18 to complete the replacement work;

[0094] S5, Switch

[0095] The device can hold two specifications of fixed oil nozzles I10 and II16. When the fixed oil nozzles need to be switched, the DC motor 1407 and the hollow servo DC motor 2 are started, and the driving worm 1404 and the driving worm wheel 1403 are operated to drive the driving rod I5 and the driving rod II 1410 to move axially, thereby driving the fixed oil nozzle switching sleeve 15 to move axially, so as to switch the fixed oil nozzles I10 and II16 of different specifications to work. When the fixed oil nozzle switching sleeve 15 moves, the fixed oil nozzle switching sleeve 15 will no longer move when it contacts the positioning boss I102 on the right sealing disc cover 1 or the positioning boss II1406-4 on the bearing seat 1406, so as to perform mechanical auxiliary positioning, and is positioned together through the programs set on the DC motor 1407 and the hollow servo DC motor 2;

[0096] III. Switch the fixed oil nozzle to the fully closed state

[0097] S1. Check whether the current fixed nozzle throttling fluid working condition is abnormal

[0098] By using instruments such as flow meters or pressure sensors, monitor whether the fluid flow or pressure drop is normal. If the fluid flow fluctuates significantly, or the outlet pressure increases or decreases when the inlet pressure remains unchanged, it means that the fixed nozzle 19 throttling fluid condition is abnormal and needs to be terminated immediately;

[0099] S2, switch to full off state

[0100] The device can hold two specifications of fixed oil nozzles, namely fixed oil nozzle I10 and fixed oil nozzle II16. There is a sealing surface 1503 between the two specifications of fixed oil nozzles. When the fixed oil nozzle needs to be fully closed, the DC motor 1407 and the hollow servo DC motor 2 are started, and the transmission worm 1404 and the transmission worm wheel 1403 are operated to drive the drive rod I5 and the drive rod II1410 to move axially, thereby driving the fixed oil nozzle switching sleeve 15 to move axially, thereby moving the sealing surface 1503 to the flow channel I907. When the fixed oil nozzle switching sleeve 15 moves, it is positioned by the program set on the DC motor 1407 and the hollow servo DC motor 2.

[0101] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. An automatically switchable and easily replaceable fixed oil nozzle, characterized in that: It comprises a right sealing disc cover (1), a hollow servo DC motor (2), a replaceable sealing cover I (3), a pressure relief screw I (4), a driving rod I (5), a right sealing disc (6), a packing gland I (7), a packing I (8), a main housing (9), a fixed oil nozzle I (10), a packing II (11), a packing gland II (12), a driving rod cover I (13), a switching mechanism (14), a fixed oil nozzle switching sleeve (15), a fixed oil nozzle II (16), a left sealing disc (17), a replaceable sealing cover II (18), and a pressure relief screw II (19); the switching mechanism (14) comprises a bearing seat cover (1401), a thrust bearing I (1402), a transmission worm wheel (1403), a transmission worm (1404), a thrust bearing II (1405), a bearing seat (1406), a DC motor (1407), an electric drive connection device (1408), a manual wheel (1409), and a driving rod II (1410); The hollow servo DC motor (2) is connected to the right sealing disc cover (1) by bolts, the hollow servo DC motor (2) is connected to the external connection thread I (502) of the driving rod I (5) by threads, the hole IV (501) on the driving rod I (5) is connected to the threaded connection hole XVIII (1504) on the fixed oil nozzle switching sleeve (15) by threading, the fixed oil nozzle I (10) and the fixed oil nozzle II (16) are connected to the threaded connection hole XVII (1502) on the fixed oil nozzle switching sleeve (15) by threads, the packing gland I (7), the packing I (8), the packing II (11), and the packing gland II (12) are coaxial, and the packing gland I (7) is connected to the main housing (9 ) is connected to the threaded connection hole VIII (909) on the main shell (9) by threaded connection, the packing I (8) is placed in the hole VIII (910) on the main shell (9), the packing II (11) is placed in the hole VII (903) on the main shell (9), the packing gland II (12) is connected to the threaded connection hole V (902) on the main shell (9) by threaded connection, the hole V (601) on the right sealing disk (6) is connected to the threaded connection hole VII (908) on the main shell (9) by threaded connection, the hole VI (604) on the right sealing disk (6) is connected to the hole I (101) on the right sealing disk cover (1) by bolts, and the threaded connection hole I (3 01) is connected to the threaded connection hole III (603) on the right sealing disk (6) by screws, the pressure relief screw I (4) is connected to the threaded connection hole II (302) on the replaceable sealing cover (3) by threads, the through hole XIII (1705) on the left sealing disk (17) is connected to the threaded connection hole IV (901) on the main housing (9) by threading, the hole XI (1406-3) on the bearing seat (1406) is connected to the hole XII (1702) on the left sealing disk (17) by bolts, the hole IX (1401-1) on the bearing seat cover (1401) is connected to the threaded connection hole XIV (1406-1) on the bearing seat (1406) by threading, and the The external connection thread II (1301) on the driving cover I (13) is connected to the threaded connection hole X (1401-2) on the bearing seat cover (1401) by threaded connection, the electric drive connection device (1408) is connected to the threaded connection hole XII (1401-5) on the bearing seat cover (1401) by threaded connection, the DC motor (1407) is connected to the electric drive connection device (1408) by bolts, the external thread (1410-1) on the driving rod II (1410) is connected to the threaded connection hole XIII (1403-1) on the transmission worm gear (1403) by threaded connection, and the thrust bearing I (1402) is placed on the boss I (1403-2) of the transmission worm gear (1403).The thrust bearing II (1405) is placed on the boss II (1403-3) of the transmission worm wheel (1403), and the assembly of the thrust bearing I (1402), the transmission worm wheel (1403) and the thrust bearing II (1405) is placed in the channel I (1406-2) of the bearing seat (1406). The threaded connection hole XV (1410-2) on the driving rod II (1410) is connected to the threaded connection hole XX (1801) on the replaceable sealing cover II (18) and the threaded connection hole XIX (1703) on the left sealing disk (17) by screws, and the pressure relief screw II (19) is connected to the threaded connection hole XXI (1802) on the replaceable sealing cover II (18) by threads.

2. According to claim 1, the fixed oil nozzle which can be automatically switched and easily replaced is characterized in that: The right sealing disc cover (1) is provided with an eyelet I (101), a positioning boss I (102), and an eyelet II (103); the replaceable sealing cover I (3) is provided with a threaded connection hole I (301), a threaded connection hole II (302), and an eyelet III (303); the right sealing disc (6) is provided with an eyelet V (601), a replacement cavity I (602), a threaded connection hole III (603), an eyelet VI (604), and a switching channel I (605); the replacement cavity I (602) is used to place the replaceable sealing cover I (3); and the switching channel I (605) is coaxial with the switching channel II (904) on the main housing (9).

3. According to claim 1, the fixed oil nozzle which can be automatically switched and easily replaced is characterized in that: The driving rod I (5) is provided with an eyelet IV (501) and an external connection thread I (502), the driving rod cover I (13) is provided with an external connection thread II (1301), and the driving rod II (1410) is provided with an external connection thread III (1410-1) and a threaded connection hole XV (1410-2).

4. The automatically switchable and easily replaceable fixed oil nozzle according to claim 1, characterized in that: The main housing (9) is provided with a threaded connection hole IV (901), a threaded connection hole V (902), an eyelet VII (903), a switching channel II (904), a threaded connection hole VI (905), a sealing ring installation groove I (906), a flow passage I (907), a threaded connection hole VII (908), a threaded connection hole VIII (909), an eyelet VIII (910), a threaded connection hole IX (911), and a sealing ring installation groove II (912).

5. The automatically switchable and easily replaceable fixed oil nozzle according to claim 1, characterized in that: The bearing seat (1406) is provided with a threaded connection hole XIV (1406-1), a channel I (1406-2), an eyelet XI (1406-3), and a positioning boss II (1406-4); the bearing seat cover (1401) is provided with an eyelet IX (1401-1), a threaded connection hole X (1401-2), an eyelet X (1401-3), a threaded connection hole XI (1401-4), and a threaded connection hole XII (1401-5); the eyelet X (1401-3) is coaxial with the transmission worm (1404); and the transmission worm wheel (1403) is provided with a threaded connection hole XIII (1403-1), a boss I (1403-2), and a boss II (1403-3).

6. The automatically switchable and easily replaceable fixed oil nozzle according to claim 1, characterized in that: The fixed oil nozzle switching sleeve (15) is provided with a threaded connection hole XVI (1501), a threaded connection hole XVII (1502), a sealing surface (1503), and a threaded connection hole XVIII (1504). The fixed oil nozzle switching sleeve (15) is placed in a switching channel II (904) on the main housing (9). The fixed oil nozzle switching sleeve (15) can move in the switching channel I (605) of the right sealing disk (6), the switching channel II (904) of the main housing, and the switching channel III (1701) of the left sealing disk (17).

7. The automatically switchable and easily replaceable fixed oil nozzle according to claim 1, characterized in that: The left sealing disk (17) is provided with a switching channel III (1701), an eyelet XII (1702), a threaded connection hole XIX (1703), a replacement chamber II (1704), and an eyelet XIII (1705); the switching channel III (1701) is coaxial with the switching channel II (904) of the main housing (9); the replacement chamber II (1704) is used for accommodating a replaceable sealing cover II (18); the replaceable sealing cover II (18) is provided with a threaded connection hole XX (1801), a threaded connection hole XXI (1802), and an eyelet XIV (1803).

8. A throttling method, characterized in that: A method for replacing or maintaining an abnormal fixed oil nozzle I (10) or fixed oil nozzle II (16) by using the automatically switchable and easily replaceable fixed oil nozzle according to any one of claims 1 to 7 comprises the following steps: S1. Monitor whether the fixed nozzle I (10) or the fixed nozzle II (16) has any abnormality. By using instruments such as flow meters or pressure sensors, the fluid flow rate or pressure drop is monitored to see if it is normal. If the fluid flow rate fluctuates significantly, or the outlet pressure increases or decreases significantly when the inlet pressure remains unchanged, it means that the fixed oil nozzle (19) in operation has become abnormal and needs to be replaced or maintained. S2. Switch fixed oil nozzle I (10) or fixed oil nozzle II (16) of different specifications to work Two types of fixed oil nozzles can be placed, namely fixed oil nozzle I (10) and fixed oil nozzle II (16). If one of the fixed oil nozzles fails, the other fixed oil nozzle is switched to operate. The following example takes the case where the fixed oil nozzle I (10) is abnormal as an example. When the fixed oil nozzle I (10) needs to be replaced, the DC motor (1407) is started, and the driving worm (1404) and the driving worm wheel (1403) are operated to drive the driving rod II (1410) to move axially. At the same time, the hollow servo DC motor (2) is started, and the driving rod I (5) is driven to move axially, thereby driving the fixed oil nozzle switching sleeve (15) to move axially, thereby switching the fixed oil nozzle II (16) of different specifications to work. When the fixed oil nozzle switching sleeve (15) moves, the fixed oil nozzle switching sleeve (15) will no longer move when it contacts the positioning boss I (102) on the right sealing disc cover (1) or the positioning boss II (1406-4) on the bearing seat (1406), so as to perform mechanical auxiliary positioning, and is positioned together through the program positioning on the DC motor (1407) and the hollow servo DC motor (2); S3. Replacement and maintenance At this time, the abnormal fixed oil nozzle 1 (10) has been moved to the replaceable sealing cover 1 (3). At this time, the pressure relief screw 1 (4) is opened to release the pressure, and then the replaceable sealing cover 1 (3) is opened to replace or maintain the abnormal fixed oil nozzle 1 (10). After the replacement or maintenance is completed, the replaceable sealing cover 1 (3) is installed and the pressure relief screw 1 (4) is closed to complete the replacement or maintenance work. II. Switch between fixed oil nozzles I (10) and II (16) of different specifications S1. Check whether the current fixed nozzle meets the working conditions By using instruments such as flow meters or pressure sensors, check whether the fluid flow or pressure drop meets the needs of the current working conditions. If it does not meet the requirements, continue to work. If not, switch to a fixed nozzle that meets the current working conditions to work; S2. Judgment According to the needs of the current working conditions, determine the required working flow range, and then determine what specifications of fixed nozzle I to use; S3. Inspection According to the determination of the required specification of the fixed oil nozzle, check whether the device of the present invention contains the fixed oil nozzle of the specification, if not, it needs to be replaced, if yes, it can be switched to the fixed oil nozzle I (10) or the fixed oil nozzle II (16); S4. Replacement Move the fixed oil nozzle I (10) and the fixed oil nozzle II (16) of unnecessary specifications to under the replaceable sealing cover I (3) or the replaceable sealing cover II (18), open the replaceable sealing cover I (3) or the replaceable sealing cover II (18), and replace the fixed oil nozzle I (10) and the fixed oil nozzle II (16) of unnecessary specifications with the fixed oil nozzle of the required specifications. After the replacement is completed, install the replaceable sealing cover I (3) or the replaceable sealing cover II (18) to complete the replacement work; S5, Switch The device can accommodate two types of fixed oil nozzles I (10) and II (16). When the fixed oil nozzles need to be switched, the DC motor (1407) and the hollow servo DC motor (2) are started, and the driving worm (1404) and the driving worm wheel (1403) are operated to drive the driving rod I (5) and the driving rod II (1410) to move axially, thereby driving the fixed oil nozzle switching sleeve (15) to move axially, thereby switching the fixed oil nozzles I (10) and II (16) of different specifications to work. When the fixed oil nozzle switching sleeve (15) moves, the fixed oil nozzle switching sleeve (15) will no longer move when it contacts the positioning boss I (102) on the right sealing disc cover (1) or the positioning boss II (1406-4) on the bearing seat (1406), so as to perform mechanical auxiliary positioning, and is positioned together through the program set on the DC motor (1407) and the hollow servo DC motor (2); III. Switch the fixed oil nozzle to the fully closed state S1. Check whether the current fixed nozzle throttling fluid working condition is abnormal By using instruments such as flow meters or pressure sensors, monitor whether the fluid flow or pressure drop is normal. If the fluid flow fluctuates significantly, or the outlet pressure increases or decreases when the inlet pressure remains unchanged, it means that the throttling fluid condition of the fixed nozzle (19) is abnormal and needs to be stopped immediately. S2, switch to fully closed state The device can accommodate two types of fixed oil nozzles, namely, fixed oil nozzle I (10) and fixed oil nozzle II (16). There is a sealing surface (1503) between the two types of fixed oil nozzles. When the fixed oil nozzle needs to be fully closed, the DC motor (1407) and the hollow servo DC motor (2) are started, and the driving worm (1404) and the driving worm wheel (1403) are operated to drive the driving rod I (5) and the driving rod II (1410) to move axially, thereby driving the fixed oil nozzle switching sleeve (15) to move axially, thereby moving the sealing surface (1503) to the flow channel I (907). When the fixed oil nozzle switching sleeve (15) moves, it is positioned by the program set on the DC motor (1407) and the hollow servo DC motor (2).

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