Pneumatic lifting system with adjustable angle and aperture gas injector

Abstract

The present application relates to the gas injector of the pneumatic lifting system's spray angle and the adjustable aperture, the gas inlet rotatable ring is located between the injector housing and the injector core body, and the square window is uniformly opened in the circumference; The injector core body is provided with a nozzle variable diameter hole group, and the gas enters the nozzle hole of the nozzle variable diameter hole group through the square window; Each aperture nozzle hole in the nozzle variable diameter hole group is connected with a universal nozzle module. The gas enters the cavity between the injector housing and the gas inlet rotatable ring through the gas injector inlet, the square window is corresponded with the specified diameter spray hole by rotating the gas inlet rotatable ring, the universal nozzle module is adjusted to the specified inclination angle by driving the radial slider and the axial slider, the gas enters the universal nozzle module through the square window, and is sprayed from the nozzle hole through the nozzle channel. The gas injector is changed to the required aperture by rotating the driving structure to drive the gas inlet rotatable ring, the spray aperture of the gas injector is adjusted, and the universal nozzle is adjusted to the required spray angle by the radial and axial driving mechanisms.

Description

Technical Field

[0001] This invention relates to a gas injector with adjustable injection angle and orifice diameter for a pneumatic lifting system, belonging to the technical field of pneumatic lifting systems. Background Technology

[0002] Pneumatic lifting of minerals is a method of lifting solid materials underwater using gas as the power source. Compared with traditional mechanical and hydraulic lifting methods, pneumatic lifting systems have no underwater moving parts, offering advantages such as low manufacturing cost, convenient maintenance, and long-term operation. However, because underwater pneumatic lifting systems for minerals operate in a three-phase flow (gas, liquid, and solid), they must handle a wide variety of complex working conditions.

[0003] Experimental studies related to pneumatic lifting systems have shown that the gas injection angle and injection orifice diameter have a significant impact on pneumatic lifting efficiency and three-phase flow pattern. Therefore, it is necessary to study a gas ejector with adjustable injection angle and orifice diameter. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a gas injector with adjustable injection angle and orifice diameter for a pneumatic lifting system.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] The gas injector of the pneumatic lifting system with adjustable injection angle and orifice diameter is characterized by: including an upper flange, a lower flange, an injector housing, an inlet swivel ring, an injector core, and an adjustable module. The gas injector housing is connected to the outer ring of the upper and lower flanges, and the injector housing is provided with a gas injector inlet. The injector core is connected to the through holes of the upper and lower flanges, and its upper and lower ends are connected to the upper and lower flanges. The surface of the injector core is provided with multiple sets of nozzle diameter-changing orifice groups with different orifice diameters. The inlet swivel ring is located between the injector housing and the injector core. The upper and lower flanges are provided with annular grooves that match the inlet swivel ring. The inlet swivel ring is placed in the annular groove of the inner ring of the upper and lower flanges. The surface of the inlet swivel ring is provided with square windows that are evenly spaced along the circumference and adapted to the nozzle diameter-changing orifice groups. Gas enters the nozzle orifice of the nozzle diameter-changing orifice group through the square windows.

[0007] The top and bottom of the intake swivel ring and the injector core are connected to the upper and lower adjustable modules. The adjustable modules include an upper bearing, a lower bearing, a rotary drive mechanism, and a universal nozzle module. The upper bearing is placed in the annular groove opened in the upper flange, and the lower bearing is placed in the annular groove opened in the lower flange. The rotary drive structure is installed on the upper bearing. The rotary drive structure drives the intake swivel ring to rotate, so that the square window corresponds to the injection hole group of the specified diameter.

[0008] Each nozzle orifice in the nozzle diameter variable orifice group is connected to a universal nozzle module. The universal nozzle module includes a nozzle channel, a nozzle hose, a limiting sleeve, a nozzle connection part, and a universal connection part. A radial slide is provided on the lower flange, and a radial slider is configured on the radial slide. A radial drive mechanism is driven and connected to the radial slider to drive the radial movement of the radial slider. An axial slide is fixed on the radial slider, and an axial slider is configured on the axial slide. An axial drive mechanism is driven and connected to the axial slider to drive the axial movement of the axial slider. The nozzle connection part is fixed on the axial slider and is slidably connected to the universal connection part. The nozzle hose is connected to the universal connection part, and the nozzle channel is connected to the nozzle hose.

[0009] Furthermore, the gas injector of the above-mentioned pneumatic lifting system with adjustable injection angle and orifice diameter includes multiple sets of nozzle diameter variable orifice groups with different orifice diameters adapted to the square window. The nozzle orifice group with the same orifice diameter consists of four rows of nozzle orifices evenly distributed circumferentially along the injector core at 90°.

[0010] Furthermore, the gas injector of the aforementioned pneumatic lifting system with adjustable injection angle and orifice diameter has sealing strips on both the left and right sides of the square window to prevent gas from entering the gap between the air intake swivel ring and the injector core. Sealing rings are provided on both the upper and lower sides of the directional window. The sealing rings are O-rings to ensure the water tightness and air tightness of the adjustable module.

[0011] Furthermore, in the aforementioned pneumatic lifting system, the gas injector with adjustable injection angle and orifice diameter includes four square windows that are evenly distributed circumferentially along the surface of the rotatable air intake ring.

[0012] Furthermore, in the aforementioned pneumatic lifting system with an adjustable injection angle and orifice diameter gas injector, a positioning device is mounted on the rotary drive structure. The positioning device includes an upper positioning seat and a matching lower positioning seat. The bottom surface of the upper positioning seat has multiple circumferentially distributed positioning grooves, and the lower positioning seat has a receiving groove. The receiving groove includes, from top to bottom, a positioning pad, a positioning ball, and a positioning spring. The positioning pad is installed in the receiving groove by an interference fit. The positioning pad has a groove, and the positioning ball and the positioning spring are placed in the groove. The positioning ball moves up and down in the receiving groove under the action of the positioning spring. The positioning pad has a through hole with a diameter smaller than that of the positioning ball, which allows the positioning ball to partially protrude. The positioning ball can partially pop out of the positioning pad, but cannot completely pass through the through hole.

[0013] Furthermore, in the aforementioned pneumatic lifting system, the gas injector with adjustable injection angle and orifice diameter has a nozzle channel extending beyond the nozzle orifice, and a sealing ring is provided between the nozzle channel and the nozzle orifice.

[0014] Furthermore, in the gas injector of the aforementioned pneumatic lifting system with adjustable injection angle and orifice diameter, the limiting sleeve is connected to the nozzle connection part, a sealing block is provided between the limiting sleeve and the universal connection part, and a sealing ring is provided between the nozzle channel and the injector core wall.

[0015] Furthermore, in the aforementioned pneumatic lifting system with an adjustable injection angle and orifice diameter gas injector, the upper end of the air intake swivel ring is provided with an annular rack. The rotation drive structure meshes with the annular rack of the air intake swivel ring through the gear of the output shaft. The rotation drive structure drives the air intake swivel ring to rotate, and the positioning ball is inserted into the positioning groove opened on the upper positioning seat. The rotation drive structure stops working, and the positioning device aligns the square window with the nozzle hole of the specified diameter, thereby adjusting the injection orifice diameter of the gas injector.

[0016] Furthermore, in the gas injector with adjustable injection angle and orifice of the above-mentioned pneumatic lifting system, the injection angle α of the universal nozzle module is adjustable within a range of -60° to 60°. When adjusting the injection angle of the universal nozzle module, the position of the universal nozzle module is adjusted by driving the axial slider and the radial slider. The radial drive mechanism drives the radial slider to move radially, and the axial drive mechanism drives the axial slider to move axially, thereby adjusting the universal nozzle module to the required injection angle.

[0017] Gas enters the cavity between the injector housing and the intake rotatable ring through the gas injector inlet. By rotating the intake rotatable ring, the square window is aligned with the injection hole of a specified diameter. By driving the radial and axial sliders, the universal nozzle module is adjusted to the specified tilt angle. Gas enters the universal nozzle module through the square window and is ejected from the nozzle hole through the nozzle channel.

[0018] Furthermore, in the aforementioned pneumatic lifting system with an adjustable injection angle and orifice diameter gas injector, the radial distance L1 between the radial slider and the injector core wall, the axial distance L2 between the axial slider and the intersection of the nozzle channel and the injector core wall, and the length distance L3 between the axial slider and the intersection of the nozzle channel and the injector core wall, satisfy L1. 2 +L2 2 =L3 2 .

[0019] Compared with the prior art, the present invention has significant advantages and beneficial effects, specifically reflected in the following aspects:

[0020] ①This invention provides a gas injector with adjustable injection angle and orifice diameter for a pneumatic lifting system. By rotating the intake rotatable ring through the rotating drive mechanism, the window corresponds to the injection orifice of the corresponding diameter, thereby adjusting the injection orifice diameter of the gas injector and controlling the gas injector to change to the required orifice diameter without disassembling the gas injector components.

[0021] ② The spray angle of the universal nozzle can be adjusted within a certain range by means of axial and radial drive mechanisms. That is, the spray angle can be adjusted to a certain spray angle, and the drive mechanism can be remotely controlled by signals to achieve automatic adjustment.

[0022] ③ It can simultaneously meet the requirements of different injection angles and injection orifices to adapt to different actual working conditions of gas lifting systems. It can also be used to study the influence of gas injection angle and gas injection orifice on gas lifting efficiency. There is no need to replace the gas injector, which not only solves the problem of the cumbersome replacement of the gas injector, but also enables automated operation through remote control, improving the convenience of use.

[0023] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing specific embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 : Schematic diagram of the outer layer structure of the gas injector of the present invention;

[0026] Figure 2 : Schematic diagram of the swivel ring section of the gas injector of the present invention;

[0027] Figure 3 : A schematic diagram of the nozzle core portion of the gas ejector of the present invention;

[0028] Figure 4 : A schematic diagram of the adjustable module;

[0029] Figure 5 : A schematic diagram of the positioning device;

[0030] Figure 6 : Schematic diagram of the universal nozzle module. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, directional and ordinal terms are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] This invention addresses the impact of injection angle and injection orifice diameter on the performance of pneumatic lifting systems. By remotely controlling the real-time switching of injection angle and injection orifice diameter in practical applications, it can adapt to more working conditions, eliminating the hassle of frequently replacing gas injectors and improving the efficiency and convenience of pneumatic lifting systems.

[0034] like Figures 1-6As shown, the pneumatic lifting system includes an adjustable gas injector with adjustable injection angle and orifice diameter, comprising an upper flange 2, a lower flange 3, an injector housing 4, an inlet swivel ring 5, an injector core 7, and an adjustable module 9. The gas injector housing 4 is welded to the outer rings of the upper flange 2 and the lower flange 3, and has a gas injector inlet 1. The injector core 7 communicates with the through holes of the upper flange 2 and the lower flange 3, and its upper and lower ends are welded to the upper flange 2 and the lower flange 3. The surface of the injector core 7 has multiple sets of orifices with different diameters. The nozzle diameter group 8 is adapted to the square window (6). The nozzle group with the same diameter consists of four rows of nozzle holes evenly distributed 90° around the injector core (7). The nozzle hole diameters are 5mm, 10mm, 15mm, and 20mm. The first nozzle group has four nozzle holes, all with a diameter of 5mm, and is arranged at 90° intervals around the circumference, designated as: A1, A2, A3, and A4. The second nozzle group has four nozzle holes, all with a diameter of 10mm, and is arranged at 90° intervals around the circumference, designated as: B1, B2, B3, B4, B5, B6, B7, B8, B9 ... 2. B3, B4; The third nozzle orifice group has four nozzle orifices, each with a diameter of 15mm, arranged at 90° intervals along the circumference, designated as: C1, C2, C3, C4; The fourth nozzle orifice group has four nozzle orifices, each with a diameter of 15mm, arranged at 90° intervals along the circumference, designated as: D1, D2, D3, D4; The four groups of orifices are at the same axial height; the circumferential order is: A1, B1, C1, D1, A2, B2, C2, D2, A3, B3, C3, D3, A4, B4, C4, D4, as follows. Figure 3 ;

[0035] The intake swivel ring 5 is located between the injector housing 4 and the injector core 7. The upper flange 2 and the lower flange 3 have annular grooves that match the intake swivel ring 5. The intake swivel ring 5 is placed in the inner annular groove of the upper flange 2 and the lower flange 3. The surface of the intake swivel ring 5 is evenly spaced with square windows 6 that match the nozzle diameter changing hole group 8. There are four square windows 6, which are evenly distributed along the circumference of the surface of the intake swivel ring 5. Gas enters the nozzle hole of the nozzle diameter changing hole group 8 through the square windows 6.

[0036] The top and bottom of the intake swivel ring 5 and the injector core 7 are connected to the upper and lower adjustable module 9. The adjustable module 9 includes an upper bearing 91, a lower bearing 92, a rotation drive mechanism 93 and a universal nozzle module 99. The upper bearing 91 is placed in the annular groove opened in the upper flange 2, and the lower bearing 92 is placed in the annular groove opened in the lower flange 3. The rotation drive structure 93 is installed on the upper bearing 91. The rotation drive structure 93 is driven by a servo motor in the adjustable module 9. The rotation drive structure 93 drives the intake swivel ring 5 to rotate, so that the square window 6 corresponds to the injection hole group of the specified diameter.

[0037] A positioning device is installed on the rotation drive structure 93. The positioning device includes an upper positioning seat 94 and a lower positioning seat 95 that is paired with it. The bottom surface of the upper positioning seat 94 is provided with a plurality of positioning grooves 941 distributed circumferentially. The lower positioning seat 95 is provided with a receiving groove 951. The receiving groove 951 includes, from top to bottom, a positioning pad 952, a positioning ball 953 and a positioning spring 954. The positioning pad 952 is installed in the receiving groove 951 by an interference fit. The positioning pad 952 is provided with a groove. The positioning ball 953 and the positioning spring 954 are placed in the groove. The positioning ball 953 moves up and down in the receiving groove 951 under the action of the positioning spring 954. The positioning pad 952 is provided with a through hole with a diameter smaller than that of the positioning ball 953, so that the positioning ball 953 can partially protrude. The positioning ball 953 can partially pop out of the positioning pad 952, but cannot completely pass through the through hole.

[0038] Each nozzle orifice in the nozzle diameter variable orifice group 8 is connected to a universal nozzle module 99. The universal nozzle module 99 includes a nozzle channel 991, a nozzle hose 992, a limiting sleeve 993, a nozzle connection part 994, and a universal connection part 995. A radial slide rail 9973 is provided on the lower flange 3, and a radial slider 9971 is mounted on the radial slide rail 9973. A radial drive mechanism 9972 is driven by the radial slider 9971 to drive the radial movement of the radial slider 9971. An upper fixed axial slide rail 9961 is provided, and an axial slider 9963 is configured on the axial slide rail 9961. An axial drive mechanism 9962 is drivenly connected to the axial slider 9963 to drive the axial slider 9963 to move axially. A nozzle connection part 994 is fixed on the axial slider 9963 and is slidably connected to a universal connection part 995. A nozzle hose 992 is connected to the universal connection part 995 through a quick connector. A nozzle channel 991 is connected to the nozzle hose 992 through a quick connector.

[0039] The limiting sleeve 993 is fixedly connected to the nozzle connection part 994. A sealing block 98 is arranged between the limiting sleeve 993 and the universal connection part 995. A sealing ring 97 is arranged between the nozzle channel 991 and the wall of the injector core 7. The adjustment range of the spray angle α of the universal nozzle module 99 is -60° to 60°. When adjusting the spray angle of the universal nozzle module 99, the position of the universal nozzle module 99 is adjusted by driving the axial slider 9963 and the radial slider 9971. The radial drive mechanism 9972 drives the radial slider 9971 to move radially, and the axial drive mechanism 9962 drives the axial slider 9963 to move axially, thereby adjusting the universal nozzle module 99 to the required spray angle.

[0040] By the Pythagorean theorem, the radial distance L1 between the radial slider 9971 and the wall of the injector core 7, the axial distance L2 between the axial slider 9963 and the intersection of the nozzle channel 991 and the wall of the injector core 7, and the distance L3 between the axial slider 9963 and the intersection of the nozzle channel 991 and the wall of the injector core 7 satisfy L1. 2 +L2 2 =L3 2 The nozzle hose 992 has a flexible structure with stretching and compression capabilities to adapt to different spray angles and operating conditions.

[0041] The upper end of the intake swivel ring 5 is provided with an annular rack. The rotation drive structure 93 meshes with the annular rack of the intake swivel ring 5 through the gear of the output shaft. The rotation drive structure 93 drives the intake swivel ring 5 to rotate. The positioning ball 953 is inserted into the positioning groove 941 opened on the upper positioning seat 94. The rotation drive structure 93 stops working. The square window 6 is aligned with the nozzle hole of the specified diameter by the positioning device, so that the injection hole diameter of the gas injector can be adjusted.

[0042] The gas injector is connected to the pneumatic lifting pipe via upper and lower flanges; gas enters the cavity between the injector housing 4 and the air intake rotatable ring 5 through the gas injector inlet 1. By rotating the air intake rotatable ring 5, the square window 6 is aligned with the injection hole of the specified diameter. By driving the radial slider 9971 and the axial slider 9963, the universal nozzle module 99 is adjusted to the specified tilt angle. The gas enters the universal nozzle module 99 through the square window 6 and is ejected from the nozzle hole through the nozzle channel 991.

[0043] Each nozzle hole corresponds to a set of universal nozzle modules 99; the nozzle channel 991 protrudes from the nozzle hole, and a sealing ring 97 is provided between the nozzle channel 991 and the nozzle hole, with the sealing ring 97 and the two being interference fit.

[0044] The square window 6 is provided with sealing strips 96 on both the left and right sides to prevent gas from entering the gap between the air intake swivel ring 5 and the injector core 7. The directional window 6 is provided with sealing rings on both the upper and lower sides. The sealing rings are O-rings to ensure the water tightness and air tightness of the adjustable module.

[0045] In summary, this invention provides a gas injector with adjustable injection angle and orifice diameter for a pneumatic lifting system. By rotating the intake swivel ring through a rotating drive mechanism, the window aligns with the corresponding orifice diameter of the injection hole, thus adjusting the injection orifice diameter of the gas injector and controlling the gas injector to change to the required orifice diameter without disassembling the gas injector components. The injection angle of the universal nozzle can be adjusted within a certain range through axial and radial drive mechanisms, i.e., adjusted to a specific injection angle. The drive mechanism is remotely controlled via signals to achieve automated adjustment. This invention can simultaneously meet the requirements of different injection angles and orifice diameters to adapt to different actual working conditions of the gas lifting system. It can also be used to study the impact of gas injection angle and orifice diameter on pneumatic lifting efficiency. Without replacing the gas injector, it solves the problem of the cumbersome process of replacing the gas injector and enables automated operation through remote control, improving ease of use.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0047] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A gas ejector with adjustable injection angle and orifice diameter for a pneumatic lifting system, characterized in that: The system includes an upper flange (2), a lower flange (3), an injector housing (4), an inlet swivel ring (5), an injector core (7), and an adjustable module (9). The gas injector housing (4) is connected to the outer rings of the upper flange (2) and the lower flange (3), and a gas injector inlet (1) is provided on the injector housing (4). The injector core (7) communicates with the through holes of the upper flange (2) and the lower flange (3), and its upper and lower ends are connected to the upper flange (2) and the lower flange (3). The surface of the injector core (7) has multiple sets of holes with different diameters. Nozzle diameter variable hole group (8); the air intake swivel ring (5) is located between the injector housing (4) and the injector core (7). The upper flange (2) and the lower flange (3) have annular grooves that match the air intake swivel ring (5). The air intake swivel ring (5) is placed in the inner annular groove of the upper flange (2) and the lower flange (3). The surface of the air intake swivel ring (5) is evenly spaced along the circumference with square windows (6) that match the nozzle diameter variable hole group (8). Gas enters the nozzle hole of the nozzle diameter variable hole group (8) through the square window (6). The top and bottom of the intake swivel ring (5) and the injector core (7) are connected to the upper and lower adjustable module (9). The adjustable module (9) includes an upper bearing (91), a lower bearing (92), a rotation drive mechanism (93), and a universal nozzle module (99). The upper bearing (91) is placed in the annular groove opened in the upper flange (2), and the lower bearing (92) is placed in the annular groove opened in the lower flange (3). The rotation drive structure (93) is installed on the upper bearing (91). The rotation drive structure (93) drives the intake swivel ring (5) to rotate, so that the square window (6) corresponds to the injection hole group of the specified diameter. Each nozzle orifice in the nozzle diameter variable orifice group (8) is connected to a universal nozzle module (99). The universal nozzle module (99) includes a nozzle channel (991), a nozzle hose (992), a limiting sleeve (993), a nozzle connection part (994), and a universal connection part (995). A radial slide rail (9973) is provided on the lower flange (3), and a radial slider (9971) is configured on the radial slide rail (9973). A radial drive mechanism (9972) is driven to drive the radial slider (9971) to move radially. An axial slide rail (9961) is fixed on the slider (9971), and an axial slider (9963) is arranged on the axial slide rail (9961). An axial drive mechanism (9962) is driven to drive the axial slider (9963) to move axially. A nozzle connection (994) is fixed on the axial slider (9963), and the nozzle connection (994) is slidably connected to the universal connection (995). The nozzle hose (992) is connected to the universal connection (995), and the nozzle channel (991) is connected to the nozzle hose (992).

2. The gas injector with adjustable injection angle and orifice diameter for the pneumatic lifting system according to claim 1, characterized in that: Multiple sets of nozzle diameter variable hole groups (8) with different orifice diameters are adapted to the square window (6). The nozzle hole group with the same orifice diameter consists of four rows of nozzle holes evenly distributed 90° circumferentially along the injector core (7).

3. The gas injector with adjustable injection angle and orifice diameter for the pneumatic lifting system according to claim 1, characterized in that: The square window (6) is provided with sealing strips (96) on both the left and right sides to prevent gas from entering the gap between the intake swivel ring (5) and the injector core (7). The directional window (6) is provided with sealing rings on both the upper and lower sides.

4. The gas injector with adjustable injection angle and orifice diameter for the pneumatic lifting system according to claim 1, characterized in that: The number of square windows (6) is four, which are evenly distributed along the circumference of the surface of the intake swivel ring (5).

5. The gas injector with adjustable injection angle and orifice diameter for the pneumatic lifting system according to claim 1, characterized in that: A positioning device is installed on the rotation drive structure (93). The positioning device includes an upper positioning seat (94) and a matching lower positioning seat (95). The bottom surface of the upper positioning seat (94) is provided with multiple circumferentially distributed positioning grooves (941). The lower positioning seat (95) is provided with a receiving groove (951). The receiving groove (951) includes, from top to bottom, a positioning pad (952), a positioning ball (953), and a positioning spring (954). The positioning pad (952) is positioned by an interference fit. The positioning pad (952) is installed in the receiving groove (951). The positioning pad (952) has a groove, and the positioning ball (953) and the positioning spring (954) are placed in the groove. The positioning ball (953) moves up and down in the receiving groove (951) under the action of the positioning spring (954). The positioning pad (952) has a through hole with a diameter smaller than that of the positioning ball (953) so that the positioning ball (953) can partially protrude. The positioning ball (953) can partially pop out of the positioning pad (952).

6. The gas injector with adjustable injection angle and orifice diameter for the pneumatic lifting system according to claim 1, characterized in that: The nozzle channel (991) extends out of the nozzle hole, and a sealing ring (97) is provided between the nozzle channel (991) and the nozzle hole.

7. The gas injector with adjustable injection angle and orifice diameter for the pneumatic lifting system according to claim 1, characterized in that: The limiting sleeve (993) is connected to the nozzle connection part (994), and a sealing block (98) is provided between the limiting sleeve (993) and the universal connection part (995). A sealing ring is provided between the nozzle channel (991) and the wall of the injector core (7).

8. The gas injector with adjustable injection angle and orifice diameter for the pneumatic lifting system according to claim 1, characterized in that: The upper end of the intake swivel ring (5) is provided with an annular rack. The rotation drive structure (93) meshes with the annular rack of the intake swivel ring (5) through the gear of the output shaft. The rotation drive structure (93) drives the intake swivel ring (5) to rotate. The positioning ball (953) is inserted into the positioning groove (941) opened on the upper positioning seat (94). The rotation drive structure (93) stops working. The positioning device aligns the square window (6) with the nozzle hole of the specified diameter and adjusts the injection hole diameter of the gas injector.

9. The gas injector with adjustable injection angle and orifice diameter for the pneumatic lifting system according to claim 1, characterized in that: The spray angle α of the universal nozzle module (99) can be adjusted from -60° to 60°. When adjusting the spray angle of the universal nozzle module (99), the position of the universal nozzle module (99) is adjusted by driving the axial slider (9963) and the radial slider (9971). The radial drive mechanism (9972) drives the radial slider (9971) to move radially, and the axial drive mechanism (9962) drives the axial slider (9963) to move axially, so as to adjust the universal nozzle module (99) to the required spray angle. Gas enters the cavity between the injector housing (4) and the air intake swivel ring (5) through the gas injector inlet (1). By rotating the air intake swivel ring (5), the square window (6) is aligned with the injection hole of the specified diameter. The universal nozzle module (99) is adjusted to the specified tilt angle by driving the radial slider (9971) and the axial slider (9963). Gas enters the universal nozzle module (99) through the square window (6) and is ejected from the nozzle hole through the nozzle channel (991).

10. The gas injector with adjustable injection angle and orifice diameter for the pneumatic lifting system according to claim 1 or 9, characterized in that: The radial distance L1 between the radial slider (9971) and the wall of the injector core (7), the axial distance L2 between the axial slider (9963) and the intersection of the nozzle channel (991) and the wall of the injector core (7), and the length distance L3 between the axial slider (9963) and the intersection of the nozzle channel (991) and the wall of the injector core (7) satisfy L1. 2 +L2 2 =L3 2 .

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