Throttling device and air tap replacing method

Abstract

The invention relates to the technical field of petroleum and natural gas production and transportation, and discloses a throttling device and a gas nozzle replacement method.The throttling device comprises a shell, an opening and closing piece movably arranged on the shell and a detachable throttling gas nozzle assembly, the shell is provided with a fluid channel and a detachable channel which are not communicated, and a hollow channel is formed in the opening and closing piece; the throttling air tap assembly is installed in the hollow channel, the opening and closing piece is provided with an opening position and a closing position, when the air tap needs to be replaced, the opening and closing piece can be switched to the closing position, the disassembling channel is communicated, the throttling air tap assembly is disassembled and moved out of the shell, and after replacement is completed, a new throttling air tap assembly is installed on the opening and closing piece. The opening and closing piece is switched to the opening position, the fluid channel is conducted, the throttling device continues to work, and the throttling effect on flowing fluid is achieved. According to the throttling device and the air tap replacement method, the air tap can be replaced without removing the pressure of pipelines before and after the throttling device, the replacement cost is reduced, and the replacement efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and natural gas production and transportation, and in particular to a throttling device and a gas nozzle replacement method. Background Art

[0002] During the production process of oil and gas fields, the natural gas, crude oil or water extracted from underground contains a certain amount of impurities such as mud and sand. During high pressure and rapid transportation, these impurities will cause erosion and wear on the transmission pipelines and equipment, shortening the service life of the pipelines and equipment and seriously endangering personal and property safety. During the production process, throttles are usually added to control the flow rate of crude oil to reduce the erosion of impurities in the oil and gas fields on the transmission pipelines and equipment.

[0003] After being used for a period of time, the existing throttle will have serious wear of the throttle nozzle or need to be replaced with other specifications to achieve different throttling effects. The throttle in the related technology is provided with nozzles of different diameters on the throttle nozzle seat. By rotating the shaft connected to the throttle nozzle seat and its wrench, the throttle nozzle seat is driven to rotate. The throttle nozzles in the throttle can be replaced with different sizes during the production process to connect them with the fluid inlet to achieve different throttling effects. However, after a throttle nozzle of a certain diameter is damaged, the throttle needs to relieve the pressure in the throttling device pipeline and remove the entire throttle, and then remove and replace the throttle nozzle. Replacing the throttle nozzle takes a long time, and a large amount of fluid in the pipeline will be discharged to the surrounding environment during replacement, causing pollution to the surrounding environment. Summary of the invention

[0004] Based on the above problems, the purpose of the present invention is to provide a throttling device and a gas nozzle replacement method, which can complete the gas nozzle replacement work when the pipeline is under pressure, improve the efficiency of gas nozzle replacement, and reduce the degree of environmental pollution during the gas nozzle replacement process.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a throttling device, comprising:

[0007] The shell is provided with a fluid channel and a disassembly channel, and the fluid channel and the disassembly channel are not connected to each other;

[0008] An opening and closing member is movably arranged in the shell, the opening and closing member is provided with a hollow channel, and the opening and closing member has an open position and a closed position;

[0009] A throttle air nozzle assembly, the throttle air nozzle assembly is detachably mounted in the hollow channel;

[0010] When the opening and closing part is in the open position, the hollow channel is connected to the fluid channel, and the throttle air nozzle assembly can throttle the fluid in the fluid channel; when the opening and closing part is in the closed position, the hollow channel is connected to the disassembly channel, and the throttle air nozzle assembly can be disassembled from the opening and closing part and moved out of the shell through the disassembly channel.

[0011] Furthermore, the fluid channel and the disassembly channel are arranged at an angle. When the opening and closing member is in the open position, the throttle air nozzle assembly and the fluid channel are parallel to each other to throttle the fluid in the fluid channel; when the opening and closing member is in the closed position, the throttle air nozzle assembly is aligned in parallel with the disassembly channel so that the throttle air nozzle assembly can be disassembled from the opening and closing member and moved out of the shell through the disassembly channel.

[0012] Specifically, the shell is also provided with a mounting shaft and a limit seat, and the opening and closing member is rotationally matched with the mounting shaft and the limit seat respectively.

[0013] Optionally, the limiting seat is provided with a sealing member and an elastic member, the sealing member is clamped between the opening and closing member and the limiting seat, and the elastic member is clamped between the limiting seat and the shell.

[0014] Specifically, the throttling air nozzle assembly includes an air nozzle and an air nozzle seat. The air nozzle is installed on the air nozzle seat, and the air nozzle seat is threadedly connected to the opening and closing member.

[0015] Preferably, the air valve seat is provided with a disassembly groove, and the disassembly tool can cooperate with the disassembly groove to drive the air valve seat to rotate and separate from the opening and closing member.

[0016] Specifically, the disassembly groove includes an introduction groove and a limiting groove that are connected to each other. The disassembly tool is provided with a limiting protrusion, and the limiting protrusion can enter the limiting groove through the introduction groove.

[0017] Preferably, the throttling device also includes a blocking component, which includes a blocking piece and a pressure relief valve. The blocking piece can be detachably blocked in the disassembly channel. The pressure relief valve is detachably connected to the blocking piece. The blocking piece is provided with a pressure relief channel. The pressure relief valve is used to open and close the pressure relief channel.

[0018] Specifically, the throttling device also includes an operating component, which includes a drive shaft and an operating handle. The drive shaft is rotatably arranged in the shell, and the operating handle is connected to the drive shaft and is located outside the shell. The operating handle can realize the switching of the opening and closing member between the open position and the closed position through the drive shaft.

[0019] In a second aspect, the present invention further provides a method for replacing a gas nozzle, which is used to replace a throttling gas nozzle assembly of the throttling device, comprising the following steps:

[0020] The opening and closing member is switched to the closed position, and the fluid passage is closed;

[0021] Disassemble the throttle air nozzle assembly on the opening and closing member, and move the disassembled throttle air nozzle assembly out of the housing through the disassembly passage;

[0022] Install the replaced throttle air nozzle assembly to connect it to the opening and closing part;

[0023] The opening and closing member is switched to the open position, and the fluid channel is opened.

[0024] The beneficial effects of the present invention are as follows: the present invention proposes a throttling device and a method for replacing an air nozzle, wherein the throttling device comprises a shell provided with a fluid channel and a disassembly channel, an opening and closing member movably arranged on the shell, and a detachable throttling air nozzle assembly, wherein the fluid channel and the disassembly channel are not connected to each other, the opening and closing member is provided with a hollow channel, and the throttling air nozzle assembly is installed in the hollow channel. The opening and closing member has an open position and a closed position, when the opening and closing member is in the open position, the hollow channel is connected with the fluid channel, and the throttling air nozzle assembly can throttle and conduct the fluid in the fluid channel, reduce the scouring of the conveying pipeline and equipment by impurities in the oil and gas field, and improve the service life of the equipment; when the opening and closing member is in the closed position, the hollow channel is connected with the disassembly channel, and the throttling air nozzle assembly can be disassembled from the opening and closing member and moved out of the shell through the disassembly channel. When the throttling air nozzle assembly needs to be replaced, the air nozzle replacement method proposed in the present invention can be used: the opening and closing part is switched to the closed position to close the fluid channel, and then the throttling air nozzle assembly on the opening and closing part is removed and moved out of the shell through the disassembly channel, and then the new throttling air nozzle assembly is installed and connected to the opening and closing part and the opening and closing part is switched to the open position to open the fluid channel so that the throttling device can continue to work. The entire air nozzle replacement process can be achieved without removing the pressure of the front and rear pipelines of the throttling device or taking out the entire throttling device, which reduces the operating cost of replacing the throttling air nozzle assembly and improves the efficiency of air nozzle replacement. At the same time, when replacing the air nozzle assembly, there is no need to release a large amount of fluid in the front and rear pipelines before disassembly and replacement. It is only necessary to release a small amount of fluid remaining in the cavity of the opening and closing part into the surrounding environment. The air nozzle replacement method proposed in the present invention can effectively reduce the pollution of the throttling device to the environment when the air nozzle is replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of the throttling device when the opening and closing member provided in a specific embodiment of the present invention is in an open position;

[0027] Figure 2 It is a partial structural schematic diagram of the throttling device when the opening and closing member provided in the specific embodiment of the present invention is in the open position;

[0028] Figure 3 It is a structural schematic diagram of a throttle air nozzle assembly provided in a specific embodiment of the present invention;

[0029] Figure 4 is a side view of a throttle air nozzle assembly provided in a specific embodiment of the present invention;

[0030] Figure 5 It is a structural schematic diagram of a disassembly tool provided in a specific embodiment of the present invention;

[0031] Figure 6 yes Figure 1 Sectional view in the AA direction;

[0032] Figure 7 yes Figure 6 A cross-sectional view of the middle opening and closing member when it is in the closed position;

[0033] Figure 8 It is a structural schematic diagram of a throttling device when a plugging assembly is separated from a disassembly channel provided by a specific embodiment of the present invention;

[0034] Fig. 9 It is a structural schematic diagram of the throttling device when the throttling air nozzle assembly is separated from the opening and closing member provided in a specific embodiment of the present invention.

[0035] In the figure:

[0036] 1. Shell; 11. Mounting shaft; 12. Limit seat; 121. Sealing member; 122. Elastic member; 13. First shell; 14. Second shell; 15. Fluid channel; 151. Elbow core; 16. Disassembly channel; 17. Straightening ring; 2. Opening and closing member; 21. Hollow channel; 3. Throttle air nozzle assembly; 31. Air nozzle; 32. Air nozzle seat; 33. Disassembly groove; 331. Introducing groove; 332. Limiting groove; 4. Operating assembly; 41. Drive shaft; 42. Operating handle; 5. Disassembly tool; 51. Limiting protrusion; 52. Rotating handle; 53. Connecting part; 54. Fixing rod; 6. Sealing assembly; 61. Sealing member; 62. Pressure relief valve. DETAILED DESCRIPTION

[0037] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "horizontal", "vertical", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first paragraph", "second paragraph" and "third paragraph" are three different parts.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and 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.

[0040] like Figures 1 to 9 As shown, the present invention provides a throttling device, which may include a housing 1, an opening and closing member 2, and a detachable throttling air nozzle assembly 3. The opening and closing member 2 is movably arranged in the housing 1, and the opening and closing member 2 is provided with a hollow channel 21. The throttling air nozzle assembly 3 is detachably installed in the hollow channel 21. A fluid channel 15 and a disassembly channel 16 are arranged in the housing 1. The fluid channel 15 can be used for the circulation of high-pressure fluids such as oil and natural gas to be mined. The size of the cross section of the fluid channel 15 is larger than the cross section size of the hollow channel 21, and the disassembly channel 16 is connected to the external environment.

[0041] The opening and closing member 2 includes an open position and a closed position. When the opening and closing member 2 is in the open position, the hollow channel 21 of the opening and closing member 2 is connected to the fluid channel 15, and the fluid channel 15 can conduct the fluid. At this time, the throttle air nozzle assembly 3 installed in the hollow channel 21 can produce a throttling effect on the fluid flowing through, control the fluid flow in the fluid channel 15, and control the fluid production of each oil and gas field well. When the fluid flows through the hollow channel 21, due to the reduction of the cross-sectional size, the flow rate of the fluid flowing through here increases, and the static pressure of the fluid at this place decreases. The throttle air nozzle assembly 3 can reduce the scouring and wear of the mud and sand in the fluid on the conveying pipeline and equipment during the rapid transportation process. When the opening and closing member 2 is in the closed position, the hollow channel 21 is interconnected with the disassembly channel 16, and the disassembly channel 16 is located on the side of the opening and closing member 2. The disassembly channel 16 and the fluid channel 15 are not interconnected. At this time, the fluid in the fluid channel 15 cannot enter the hollow channel 21, and the fluid cannot circulate here.

[0042] In order to adapt to the flexibility of the position setting of the fluid channel 15 and the disassembly channel 16 inside the throttling device, the opening and closing member 2 can be slidably set in the housing 1, and the fluid channel 15 and the disassembly channel 16 can be set at any angle. After the setting is completed, a slide can be built between the fluid channel 15 and the disassembly channel 16 and the opening and closing member can be slidably set on the slide. The driving device can be connected to the opening and closing member 2 to drive the opening and closing member 2 to complete the sliding process. When the opening and closing member 2 slides to the fluid channel 15, the opening and closing member 2 is in the open position, the hollow channel 21 and the fluid channel 15 are mutually connected, and the throttling air nozzle assembly 3 and the fluid channel 15 are parallel to each other. At this time, the throttling air nozzle assembly 3 can throttle and conduct the fluid in the fluid channel 15 to reduce the scouring of the throttling device by the high-pressure fluid in the conveying pipeline; when the opening and closing member 2 slides to the disassembly channel 16, the opening and closing member 2 is in the closed position. At this time, the throttling air nozzle assembly 3 is parallel to and aligned with the disassembly channel 16, and the throttling air nozzle assembly 3 can be removed from the opening and closing member 2 and moved out of the housing through the disassembly channel 16.

[0043] In order to avoid the opening and closing member 2 occupying too much space inside the throttling device when realizing position switching, the opening and closing member 2 can also be rotated and set in the housing 1, and the fluid channel 15 and the disassembly channel 16 are set vertically. When the opening and closing member 2 is rotated to the open position, the hollow channel 21 is connected with the fluid channel 15, and the fluid flows through the hollow channel 21. The throttling air nozzle assembly 3 can adjust the flow rate of the fluid in the fluid channel 15; when the opening and closing member 2 is rotated to the closed position, the hollow channel 21 is connected with the disassembly channel 16 to block the flow of the fluid here. In order to facilitate the rotation of the opening and closing member 2, the opening and closing member 2 can be set as a sphere, and the hollow channel 21 can also be set as a circular channel to reduce the flow resistance of the fluid when it flows through here. In order to reduce the scouring of the fluid on the housing 1 and extend the service life of the throttling device, an elbow core 151 can be set at the bend of the fluid channel 15. The elbow core 151 can support the inner wall of the bend of the fluid channel 15 to prevent the bend of the fluid channel 15 from being deformed by the fluid pressure, guide the flow of the fluid here, and improve the fluid delivery efficiency. The elbow core 151 may be fixedly connected to the housing 1 , for example, the elbow core 151 may be connected to the housing 1 via a pin.

[0044] like Figure 1 and Figure 2As shown, in order to ensure that the opening and closing member 2 can rotate in the housing 1 and effectively fix the position of the opening and closing member 2 in the housing 1, a mounting shaft 11 and a limit seat 12 can be set in the housing 1. One end of the mounting shaft 11 can be fixedly set in the housing 1 through a threaded connection. The opening and closing member 2 is provided with a mounting hole. The other end of the mounting shaft 11 can pass through the mounting hole to connect with the opening and closing member 2. The opening and closing member 2 rotates in the housing 1 with the mounting shaft 11 as a fulcrum. When rotating, the opening and closing member 2 cooperates with the mounting shaft 11 and the limit seat 12 respectively. In order to optimize the rotation process of the opening and closing member 2 in the housing 1, the inner edge of the limit seat 12 can be processed into a shape that matches the outer edge of the opening and closing member 2.

[0045] In order to facilitate the installation of the opening and closing member 2, the housing 1 can be set as a split structure, for example, the housing 1 can be set as a first housing 13 and a second housing 14, the first housing 13 is provided with a first channel, the second housing 14 is provided with a second channel, when the first housing 13 and the second housing 14 are connected, the first channel and the second channel can form a fluid channel 15, and the first housing 13 and the second housing 14 can be connected by nuts and studs. Two groups of limit seats 12 can be set in the housing 1, one group of limit seats 12 is set on the first housing 13, and the other group of limit seats 12 is set on the second housing 14. When the first housing 13 and the second housing 14 are assembled, it is necessary to ensure that the opening and closing member 2 is sandwiched between the two groups of limit seats 12, and ensure that the opening and closing member 2 is tightly connected with the limit seats 12 to avoid leakage at the connection between the two when the fluid flows. When the opening and closing member 2 is in the open position, the first channel and the second channel can be connected to the hollow channel 21 in the opening and closing member 2, so that the throttling air nozzle assembly 3 located on the hollow channel 21 can produce a throttling effect on the fluid flowing through, reduce the static pressure of the fluid here, and reduce the erosion and wear of the throttling device by the fluid during rapid transportation.

[0046] like Figure 1 and Figure 2As shown, in order to enhance the seal between the opening and closing member 2 and the limiting seat 12, a sealing member 121 and an elastic member 122 can also be provided in the limiting seat 12, wherein the sealing member 121 is sandwiched between the opening and closing member 2 and the limiting seat 12, and the elastic member 122 is sandwiched between the limiting seat 12 and the housing 1, and the elastic member 122 can be a wave coil spring. When the opening and closing member 2 is in the open position, the fluid flows through the fluid channel 15, and the fluid will scour the limiting seat 12 and the housing 1, pushing the elastic member 122 on the limiting seat 12 to deform, and the elastic member 122 can effectively buffer the impact of the limiting seat 12 on the housing 1. At the same time, when the elastic member 122 is deformed, it can also generate a reaction force on the limiting seat 12, and the reaction force will act on the connection between the limiting seat 12 and the opening and closing member 2, so that the sealing member 121 can press the opening and closing member 2, improve the sealing of the connection between the opening and closing member 2 and the limiting seat 12, ensure that the fluid will not leak into the throttling device here, and extend the service life of the throttling device. In order to enhance the sealing effect of the seal 121, the seal 121 can be configured as a combination of a sealing gasket and a sealing ring. The sealing gasket has a larger contact area and can withstand higher pressure, while the sealing ring can further fill smaller gaps on the basis of the sealing gasket. The combination of the two can achieve double sealing.

[0047] The throttle air nozzle assembly 3 may include an air nozzle 31 and an air nozzle seat 32. The air nozzle 31 is installed on the air nozzle seat 32. The throttle air nozzle assembly 3 is detachably installed in the hollow channel 21 in the opening and closing member 2. The air nozzle seat 32 and the opening and closing member 2 may be threadedly connected. To facilitate disassembly and replacement, the air nozzle 31 may be fixedly installed on the air nozzle seat 32, and the entire throttle air nozzle assembly 3 may be directly replaced during disassembly. To reduce the cost of replacing the air nozzle 31, the air nozzle 31 may also be detachably installed on the air nozzle seat 32. When the air nozzle 31 is damaged and needs to be replaced, only the air nozzle 31 needs to be replaced, and there is no need to replace the air nozzle seat 32.

[0048] like Figure 4-Figure 9 As shown, in order to facilitate the disassembly and replacement of the throttle air nozzle assembly 3, disassembly grooves 33 can be provided on both sides of the air nozzle seat 32, and the disassembly tool 5 can cooperate with the disassembly grooves 33 to drive the air nozzle seat 32 to rotate and separate from the opening and closing member 2. The disassembly grooves 33 can include a connected introduction groove 331 and a limit groove 332. Figure 5As shown, the disassembly tool 5 includes a rotating handle 52 and a connecting portion 53, which are connected by a fixing rod 54. The limiting protrusion 51 is arranged on the inner side of the connecting portion 53, and the limiting protrusion 51 can enter the limiting groove 332 via the introduction groove 331. Compared with a single notch, the disassembly groove 33 is processed into two interconnected introduction grooves 331 and the limiting groove 332, which can facilitate the disassembly of the tool 5 when the disassembly tool 5 is connected to the gas nozzle seat 32, and at the same time, axial force and circumferential force are applied to the gas nozzle seat 32, so that the gas nozzle seat 32 can be conveniently removed from the disassembly channel 16. When replacing the gas nozzle 31, the side where the connecting portion 53 of the disassembly tool 5 is located can be used to face the disassembly channel 16, and the connecting portion 53 enters the housing 1 via the disassembly channel 16 and connects with the gas nozzle seat 32. After ensuring that the limiting protrusion 51 enters the disassembly groove 33, the rotating handle 52 can be rotated counterclockwise to move the gas nozzle seat 32 to the outside of the housing 1 via the disassembly channel 16, and the disassembly of the throttle gas nozzle assembly 3 is completed.

[0049] When the opening and closing member 2 is in the closed position, dust or humid steam in the external environment may enter the throttling device through the disassembly channel 16, corrode the internal structure of the throttling device, and even affect the normal operation of the throttling device. To avoid the above situation, the throttling device may also include a blocking component 6, which is detachably arranged in the disassembly channel 16, and the blocking component 6 can be used to block the disassembly channel 16. After the blocking component 6 is set, when the opening and closing member 2 is in the closed position, the residual high-pressure fluid inside will be blocked by the blocking component 6, and the fluid cannot flow to the surrounding environment through the disassembly channel 16.

[0050] Specifically, the blocking component 6 may include a blocking member 61 and a pressure relief valve 62. The blocking member 61 can be detachably blocked in the disassembly channel 16. A pressure relief channel is provided on the side of the blocking member 61 that contacts the external environment. The pressure relief channel is connected to the disassembly channel 16. Figure 6-Figure 8 As shown, the plugging member 61 can be processed from columns with different outer diameters. According to the outer diameter, the plugging member 61 can be regarded as three sections from top to bottom, wherein the first section and the second section are both located inside the shell 1, and the edges of the first section and the second section can be fitted to the shell 1 to prevent high-pressure fluid from leaking from the edges. The third section is located outside the shell 1, which is convenient for installing the pressure relief valve 62. The pressure relief valve 62 can be used to open and close the pressure relief channel, and the pressure relief valve 62 and the plugging member 61 are detachably connected. When the opening and closing member 2 is rotated to the closed position, the pressure relief valve 62 can be opened first to open the pressure relief channel, balance the pressure difference between the pressure relief channel and the disassembly channel 16 and the external environment, and prevent the surrounding pipelines and equipment from being impacted by the residual high-speed fluid inside after the plugging assembly 6 is disassembled.

[0051] When the opening and closing member 2 is rotatably arranged on the housing 1, in order to facilitate the rotation of the opening and closing member 2, the throttling device proposed in the present invention may also include an operating assembly 4, the operating assembly 4 includes a drive shaft 41 and an operating handle 42, the drive shaft 41 is rotatably arranged on the housing 1, in order to facilitate the operation of the opening and closing member 2 to rotate, the axis of the drive shaft 41, the axis of the mounting shaft 11 and the axis of rotation of the opening and closing member 2 can be arranged on the same vertical line, the operating handle 42 is connected to the drive shaft 41, the operating handle 42 is located outside the housing 1, and the operating handle 42 can realize the switching of the opening and closing member between the open position and the closed position through the drive shaft 41. In order to reduce the friction generated between the housing 1 and the drive shaft 41 when the operating handle 42 rotates, a thrust bearing can be arranged at the connection between the drive shaft 41 and the housing 1. When the opening and closing member 2 is in the working position, in order to prevent the opening and closing member 2 from shifting when the fluid flushes the shell 1, a group of straightening rings 17 can be respectively provided on the drive shaft 41 and the installation shaft 11. The straightening rings 17 are respectively provided on the drive shaft 41 and the installation shaft 11 to ensure that the forces on the two are consistent in all directions.

[0052] In addition, in order to improve the internal sealing effect of the throttling device, in addition to setting a seal 121 at the connection between the limit seat 12 and the opening and closing part 2, sealing rings can also be set at multiple locations such as the connection between the drive shaft 41 and the housing 1, the connection between the sealing assembly 6 and the housing 1, and the connection between the throttling air nozzle assembly 3 and the opening and closing part 2.

[0053] like Figure 6 and Figure 7 As shown, the operating handle 42 has a first position and a second position. The operating handle 42 can be rotated 90 degrees clockwise from the first position to the second position. Figure 6 As shown, when the operating handle 42 is in the first position, the opening and closing member 2 is in the open position, the hollow channel 21 is connected with the fluid channel 15, and the throttling device is in a normal working state. The throttling nozzle assembly 3 can produce a throttling effect on the fluid in the fluid channel 15, reduce the scouring of the throttling device as a whole by the fluid in the fluid channel 15, and extend the service life of the throttling device. Figure 7 As shown, when the operating handle 42 is in the second position, the hollow channel 21 cannot be connected to the fluid channel 15, and the throttling device stops working. At this time, the hollow channel 21 is parallel to the disassembly channel 16. When the throttling air nozzle assembly 3 is damaged or it is necessary to replace the air nozzle 31 of other sizes to achieve other throttling effects, the throttling air nozzle assembly 3 can be disassembled at this time and moved outside the shell through the disassembly channel 16. After replacement, the new throttling air nozzle assembly 3 is installed back into the hollow channel 21, and the operating handle 42 is turned 90 degrees counterclockwise to switch the operating handle 42 to the first position, so that the opening and closing member 2 can be turned back to the open position, and the fluid in the fluid channel 15 can continue to be conducted and a throttling effect can be produced thereon.

[0054] like Figure 8and Fig. 9 As shown, when the air nozzle 31 needs to be replaced, the following operation method can also be used: first rotate the operating handle 42 to the second position, at which time the opening and closing member 2 is in the closed position, the hollow channel 21 and the fluid channel 15 are not connected to each other, and the fluid will not flow through here. At this time, the pressure relief valve 62 can be opened to open the pressure relief channel, and after the air pressure in the disassembly channel 16 is balanced with the external air pressure, the blocking component 6 is taken out, and after the high-pressure fluid remaining in the hollow channel 21 is released, the disassembly tool 5 is used to connect the air nozzle seat 32. At this time, the limiting protrusion 51 of the disassembly tool 5 partially enters the disassembly groove 33, and the rotating handle 52 is rotated counterclockwise to remove the throttling air nozzle assembly 3 from the opening and closing member 2. After replacing the new throttling air nozzle assembly 3, the disassembly tool 5 is used again to connect the air nozzle seat 32, and the throttling air nozzle assembly 3 can be installed and connected to the opening and closing member 2 by rotating the rotating handle 52 clockwise. After the installation is completed, the disassembly tool 5 is taken out, the plugging assembly 6 is installed and the pressure relief valve 62 is closed, and finally the operating handle 42 is turned counterclockwise to return the operating handle 42 to the first position, the opening and closing member 2 is in the open position, and the throttling device resumes normal operation and continues to play a throttling role in the fluid transportation process of the oil and gas field.

[0055] To facilitate the removal of the tool 5 to enter and connect the valve seat 32, as shown in FIG. Fig. 9 As shown, a stepped hole can be processed inside the opening and closing part 2, and different parts of the stepped hole can adapt to the structure of the air nozzle seat 32 and the disassembly tool 5 respectively. After the stepped hole is set, the installation and disassembly of the air nozzle seat 32 can be facilitated, ensuring that the air nozzle seat 32 will not move axially or radially after installation, thereby improving the accuracy and stability of assembly. A plurality of sealing rings can also be set at the stepped hole to effectively prevent the fluid from leaking here when the hollow channel 21 is connected to the fluid channel 15. The step hole can also facilitate the disassembly tool 5 to enter through the disassembly channel 16, and provide sufficient operating space for the disassembly tool 5 to install or disassemble the air nozzle seat 32, making the assembly process more convenient and quick.

[0056] The present invention also provides a method for replacing an air nozzle. When the throttling air nozzle assembly 3 is damaged or an air nozzle 31 of another size needs to be replaced to achieve other throttling effects, the following method can be used: switch the opening and closing component 2 to the closed position, close the fluid channel 15, and at this time, the hollow channel 21 is connected to the disassembly channel 16, and the residual high-pressure fluid in the opening and closing component 2 can be discharged through the disassembly channel 16. After the discharge, the throttling air nozzle assembly 3 on the opening and closing component 2 is disassembled and moved out of the shell 1 through the disassembly channel 16, and then the new throttling air nozzle assembly 3 is installed and connected to the opening and closing component 2, and the opening and closing component 2 is switched to the open position, so that the hollow channel 21 is connected to the fluid channel 15, and the fluid can continue to flow here, so that the throttling device can continue to work. For the fixed throttle in the related art, the entire fixed throttle can only be taken out and the air nozzle 31 replaced after the valves before and after the pipeline where the throttle is located are closed and the pipeline pressure is released. The cost of replacing the air nozzle 31 is high, and when replacing the air nozzle 31, a large amount of fluid in the pipeline before and after the fixed throttle needs to be released before disassembly and replacement. The air nozzle replacement method proposed in the present invention can replace the air nozzle 31 under the condition that the pipeline before and after the throttling device is under pressure, which reduces the replacement cost of the throttling air nozzle assembly 3, improves the replacement efficiency of the air nozzle 31, and only releases a small amount of fluid remaining in the cavity of the opening and closing part 2 into the surrounding environment, which has less pollution to the environment. In addition, the size of the throttling device proposed in the present invention is consistent with the size of the original installed fixed throttle, and the original fixed throttle can be directly replaced with the throttling device of the present invention without modifying the existing pipeline.

[0057] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A throttling device, characterized in that: include: A housing (1), wherein the housing (1) is provided with a fluid channel (15) and a disassembly channel (16), and the fluid channel (15) and the disassembly channel (16) are not connected to each other; An opening and closing member (2), the opening and closing member (2) being movably arranged in the shell (1), the opening and closing member (2) being provided with a hollow channel (21), and the opening and closing member (2) having an open position and a closed position; A throttle air nozzle assembly (3), wherein the throttle air nozzle assembly (3) is detachably mounted on the hollow passage (21); When the opening and closing member (2) is in the open position, the hollow channel (21) is connected to the fluid channel (15), and the throttle air nozzle assembly (3) can throttle the fluid in the fluid channel (15); when the opening and closing member (2) is in the closed position, the hollow channel (21) is connected to the disassembly channel (16), and the throttle air nozzle assembly (3) can be disassembled from the opening and closing member (2) and moved out of the housing (1) through the disassembly channel (16).

2. The throttling device according to claim 1, characterized in that: The fluid channel (15) and the disassembly channel (16) are arranged at an angle; when the opening and closing member (2) is in the open position, the throttle air nozzle assembly (3) and the fluid channel (15) are parallel to each other so as to throttle and conduct the fluid in the fluid channel (15); when the opening and closing member (2) is in the closed position, the throttle air nozzle assembly (3) and the disassembly channel (16) are aligned in parallel so that the throttle air nozzle assembly (3) can be disassembled from the opening and closing member (2) and moved out of the housing (1) through the disassembly channel (16).

3. The throttling device according to claim 1, characterized in that: The housing (1) is also provided with a mounting shaft (11) and a limiting seat (12), and the opening and closing member (2) is rotationally matched with the mounting shaft (11) and the limiting seat (12) respectively.

4. The throttling device according to claim 3, characterized in that: The limiting seat (12) is provided with a sealing member (121) and an elastic member (122); the sealing member (121) is clamped between the opening and closing member (2) and the limiting seat (12); and the elastic member (122) is clamped between the limiting seat (12) and the shell (1).

5. The throttling device according to claim 1, characterized in that: The throttling air nozzle assembly (3) comprises an air nozzle (31) and an air nozzle seat (32); the air nozzle (31) is mounted on the air nozzle seat (32); and the air nozzle seat (32) is threadedly connected to the opening and closing member (2).

6. The throttling device according to claim 5, characterized in that: The gas valve seat (32) is provided with a disassembly groove (33), and the disassembly tool (5) can cooperate with the disassembly groove (33) to drive the gas valve seat (32) to rotate and separate from the opening and closing member (2).

7. The throttling device according to claim 5, characterized in that: The disassembly groove (33) comprises an introduction groove (331) and a limiting groove (332) which are connected to each other. The disassembly tool (5) is provided with a limiting protrusion (51), and the limiting protrusion (51) can enter the limiting groove (332) via the introduction groove (331).

8. The throttling device according to claim 1, characterized in that: The throttling device further comprises a blocking component (6), the blocking component (6) comprising a blocking member (61) and a pressure relief valve (62), the blocking member (61) being detachably blocked in the disassembly channel (16), the pressure relief valve (62) being detachably connected to the blocking member (61), the blocking member (61) being provided with a pressure relief channel, and the pressure relief valve (62) being used for opening and closing the pressure relief channel.

9. The throttling device according to claim 1, characterized in that: The throttling device further comprises an operating assembly (4), wherein the operating assembly (4) comprises a drive shaft (41) and an operating handle (42), wherein the drive shaft (41) is rotatably disposed on the housing (1), and the operating handle (42) is connected to the drive shaft (41) and is located outside the housing (1), and the operating handle (42) can realize the switching of the opening and closing member (2) between the open position and the closed position through the drive shaft (41).

10. A method for replacing a gas nozzle, characterized in that: A method for replacing a throttle nozzle assembly (3) of a throttling device according to any one of claims 1 to 9, comprising the following steps: The opening and closing member (2) is switched to the closed position, and the fluid channel (15) is closed; Disassembling the throttle air nozzle assembly (3) on the opening and closing member (2), and moving the disassembled throttle air nozzle assembly (3) out of the housing (1) through the disassembly passage (16); Installing the replaced throttle nozzle assembly (3) to connect with the opening and closing member (2); The opening and closing member (2) is switched to the open position, and the fluid channel (15) is connected.

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