A positioning device for a steam injection nozzle assembly and a steam injection nozzle assembly

Abstract

This application discloses a positioning device for a steam injection nozzle assembly and a steam injection nozzle assembly, including a positioning base plate, a first positioning groove, a nozzle assembly mounting plate, and a second positioning groove. The positioning base plate is placed on an installation plane or the ground. The first positioning groove is formed in the positioning base plate. The nozzle assembly mounting plate is disposed on the upper surface of the positioning base plate. Ignoring manufacturing tolerances, the nozzle assembly mounting plate is perpendicular to the positioning base plate. The second positioning groove is formed in the nozzle assembly mounting plate. In actual use, the flanged bend is fixedly installed on the positioning base plate through the first positioning groove, and the nozzle chamber is installed on the nozzle assembly mounting plate through the second positioning groove. After installation, the welded ends of the flanged bend and the nozzle chamber are fixed and connected, allowing welding operations to be performed. This technical solution fixes the flanged bend and the nozzle chamber to the positioning base plate, ensuring that the horizontal and vertical dimensions of the flanged bend and the nozzle chamber meet the design requirements.

Description

Technical Field

[0001] This application relates to the field of steam turbine technology, and in particular to a positioning device for a steam injection nozzle assembly and a steam injection nozzle assembly. Background Technology

[0002] A steam turbine is a core component of thermal power generation, converting the thermal energy of high-temperature, high-pressure steam generated by a boiler into mechanical energy. The feedwater pump turbine is an important auxiliary device in a thermal power generation system. Its function is to use steam extracted from the main turbine to drive the boiler feedwater pump, pressurizing the deoxygenated condensate to the pressure required by the boiler (typically tens of megapascals). This overcomes the flow resistance of components such as the boiler and economizer, ensuring that water smoothly enters the boiler system and guarantees the continuous and stable generation of steam to be fed into the main turbine, thus maintaining the stable operation of the thermal power plant.

[0003] To ensure the stable operation of the main steam turbine system, the feedwater pump turbine has two steam inlet systems: a main steam inlet and a supplementary steam inlet. When the main steam turbine is operating below 80% THA load, the feedwater pump turbine uses a single main steam inlet system. When the main steam turbine is operating at full load or TRL load, the feedwater pump turbine uses a combination of the main steam inlet system and the supplementary steam inlet system to meet the output requirements of the main steam turbine.

[0004] The feedwater pump turbine nozzle assembly is divided into an upper main nozzle assembly and a lower make-up steam nozzle assembly, which are matched to the main steam inlet system and the make-up steam inlet system of the feedwater pump turbine, respectively. The feedwater pump turbine make-up steam nozzle assembly is formed by welding a flanged elbow to the make-up steam nozzle assembly. It is installed in the lower half of the feedwater pump turbine via the flange of the make-up steam nozzle assembly and connected to the make-up steam inlet pipeline via the flange on the flanged elbow. Due to the complex shape and multiple positioning surfaces of the flanged elbow and the make-up steam nozzle assembly, it is necessary to ensure that the centerline of the flange side of the flanged elbow is parallel to the flange face of the nozzle chamber before welding, that the axial dimensions of the flanged elbow and the nozzle assembly are accurately positioned, and that the centerline of the make-up steam nozzle assembly is consistent with the centerline of the feedwater pump turbine. Therefore, higher requirements are placed on the precise positioning during the production of the make-up steam nozzle assembly. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the first aspect of this utility model provides a positioning device for a steam injection nozzle assembly.

[0007] The second aspect of this utility model provides a steam injection nozzle assembly.

[0008] The third aspect of this utility model provides a welding method for a steam injection nozzle assembly.

[0009] In view of this, a steam injection nozzle group positioning device is provided according to a first aspect of the embodiments of this application, comprising: Positioning base plate; The first positioning groove is formed in the positioning base plate and is used to install a flanged bend. A nozzle assembly mounting plate is disposed on the upper surface of the positioning base plate; The second positioning groove is formed on the nozzle assembly mounting plate and is used to install the nozzle chamber assembly. The support rod includes an extension rod and an arc-shaped bracket. One end of the extension rod is connected to the positioning base plate, and the other end of the extension rod is connected to the arc-shaped bracket, which is used to support the flanged bend.

[0010] In one feasible implementation, it further includes: The first reinforcing rib group is disposed on the front surface of the nozzle assembly mounting plate, and the first reinforcing rib group has two reinforcing plates. The second reinforcing rib group is disposed on the rear surface of the nozzle assembly mounting plate, and the second reinforcing rib group has four reinforcing plates.

[0011] In one feasible implementation, it further includes: The first positioning component includes two positioning blocks and two locking blocks. The first positioning groove is a square groove with rounded corners. Two positioning blocks are respectively provided on the positioning base plate on the outer side of two adjacent straight edges of the first positioning groove, and two locking blocks are respectively provided on the positioning base plate on the outer side of the other two straight edges of the first positioning groove.

[0012] The locking block is provided with screw holes.

[0013] In one feasible implementation, the nozzle assembly mounting plate includes: An outer side plate, the lower end of which is connected to the upper surface of the positioning base plate; The mounting surface is embedded in the outer side plate, and the second positioning groove is a U-shaped groove, which is formed on the mounting surface.

[0014] In one feasible implementation, the nozzle assembly mounting plate further includes: A set of threaded holes is arranged in an arc shape around the second positioning groove and is formed on the mounting surface.

[0015] In one feasible implementation, the nozzle assembly mounting plate further includes: The second positioning component includes two positioning blocks and a locking block. The second positioning component is disposed on the outer side plate. The positioning blocks are provided at the lower end and one side of the mounting surface, and the locking block is provided on the other side of the mounting surface. The locking block has screw holes.

[0016] In one feasible implementation, it further includes: a sliding component, wherein the locking block with the slope is disposed on the sliding component.

[0017] In one feasible implementation, the first positioning component further includes: A slope is provided on one of the locking blocks, the slope being provided on the side of the locking block facing the first positioning groove; A sliding groove is provided on the positioning base plate, and the locking block with the slope surface slides in the sliding groove; The top plate has one end of the sliding groove pointing to the first positioning groove, and the top plate is disposed at the other end of the sliding groove; A spring, with its two ends respectively disposed on the top plate and a locking block having the slope.

[0018] A second aspect of the embodiments of this application provides a steam injection nozzle assembly, comprising: A flanged bend has a bent pipe, one end of which is a first flange and the other end of which is a welded end; The nozzle chamber has a connecting pipe and a second flange, the second flange being disposed at one end of the connecting pipe, and the second flange having threaded holes on its circumference.

[0019] According to a third aspect of the embodiments of this application, a method for welding a steam injection nozzle assembly is provided, which involves welding the steam injection nozzle assembly as described above using a steam injection nozzle assembly positioning component as described in any of the above-mentioned embodiments, including: The flanged bend has one end with the first flange fixed to the first positioning groove. The connecting pipe of the nozzle chamber is fixed to the second positioning groove; The second flange is attached to one side of the nozzle assembly mounting plate; Welding is performed on the welded end of the bent pipe and the end of the connecting pipe where the second flange is installed.

[0020] In one feasible implementation, it further includes: The first flange is fixed by a positioning device; The second flange is fixed by a positioning device; The second flange is further secured using annular bolt holes.

[0021] Compared with existing technologies, this utility model has at least the following beneficial effects: Generally speaking, in the field of pipeline installation, the welding positioning of such pipelines and fittings is relatively rough, and simple fixing can be achieved by using pressure plates, jacks, pads or brackets. However, in the field of machining, due to the high requirements for the assembly accuracy of the product workpiece, it is impossible to achieve precise positioning by simply adjusting the flanged bend and nozzle chamber. Positioning takes a long time and has low work efficiency. This technical solution fixes the flanged bend and nozzle chamber to the positioning base plate, ensuring that the horizontal and vertical dimensions of the flanged bend and nozzle chamber meet the design requirements. This not only reduces the time for adjusting the flanged bend and nozzle chamber, but also the positioning device can fix the welding position of the flanged bend and nozzle chamber, ensuring stable operation of the welding process and improving the overall steam production efficiency of the steam injection nozzle group. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A structural block diagram of a steam injection nozzle group positioning device according to an embodiment of this application; Figure 2 A structural block diagram of a steam injection nozzle group positioning device and a steam injection nozzle group according to an embodiment of this application; Figure 3 This is a schematic flowchart illustrating a method for welding a steam injection nozzle assembly, as provided in this application.

[0023] in, Figure 1-2 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100. Positioning base plate; 200. First positioning groove; 300. Nozzle assembly mounting plate; 400. Second positioning groove; 500. First reinforcing rib assembly; 600. Second reinforcing rib assembly; 700. First positioning component; 310. Outer side plate; 320. Mounting surface; 330. Threaded hole assembly; 340. Second positioning assembly; 101. Flange-equipped elbow; 102. Nozzle chamber. Detailed Implementation

[0024] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0025] like Figure 1-2 As shown, a first aspect of the present application provides a steam injection nozzle assembly positioning device, comprising: a positioning base plate 100; a first positioning groove 200 formed in the positioning base plate 100, the first positioning groove 200 being used to install a flanged bend 101; a nozzle assembly mounting plate 300 disposed on the upper surface of the positioning base plate 100; a second positioning groove 400 formed in the nozzle assembly mounting plate 300, the second positioning groove 400 being used to install a nozzle chamber 102 assembly; and a support rod comprising an extension rod and an arc-shaped support, one end of the extension rod being connected to the positioning base plate, and the other end of the extension rod being connected to the arc-shaped support, the arc-shaped support being used to support the flanged bend.

[0026] The embodiment provided in this application includes a positioning base plate 100, a first positioning groove 200, a nozzle assembly mounting plate 300, and a second positioning groove 400. The positioning base plate 100 is placed on an installation plane or the ground. The first positioning groove 200 is formed in the positioning base plate 100. The nozzle assembly mounting plate 300 is disposed on the upper surface of the positioning base plate 100. Ignoring manufacturing tolerances, the nozzle assembly mounting plate 300 is perpendicular to the positioning base plate 100. The second positioning groove 400 is formed in the nozzle assembly mounting plate 300.

[0027] In actual use, the flanged bend 101 is fixedly installed on the positioning base plate 100 through the first positioning groove 200, and the nozzle chamber 102 is installed on the nozzle assembly mounting plate 300 through the second positioning groove 400. After installation, the welding ends of the flanged bend 101 and the nozzle chamber 102 are fixed and connected, and welding operations can be performed.

[0028] Generally, in the field of pipeline installation, the welding positioning of such pipes and fittings is relatively rough, and simple fixation can be achieved using pressure plates, jacks, pads, or brackets. However, in the field of machining, due to the high requirements for the assembly precision of the product workpieces, precise positioning cannot be achieved by simply adjusting the flanged bend 101 and the nozzle chamber 102. Positioning takes a long time and has low work efficiency. This technical solution fixes the flanged bend 101 and the nozzle chamber 102 to the positioning base plate 100, ensuring that the horizontal and vertical dimensions of the flanged bend 101 and the nozzle chamber 102 meet the design requirements. This not only reduces the time for adjusting the flanged bend 101 and the nozzle chamber 102, but also allows the positioning device to keep the welding position of the flanged bend 101 and the nozzle chamber 102 fixed, ensuring stable operation during the welding process and improving the overall steam production efficiency of the steam injection nozzle group.

[0029] like Figure 1-2 As shown, it also includes: a first reinforcing rib group 500, which is disposed on the front surface of the nozzle assembly mounting plate 300 and has two reinforcing plates; and a second reinforcing rib group 600, which is disposed on the rear surface of the nozzle assembly mounting plate 300 and has four reinforcing plates.

[0030] In this technical solution, the positioning device also includes a first reinforcing rib group 500 and a second reinforcing rib group 600.

[0031] The first reinforcing rib group 500 has two right-angled triangular plates, which are the reinforcing plates of the first reinforcing rib group 500. The two right-angled sides of the two right-angled triangular plates are respectively connected to the positioning base plate 100 and the nozzle assembly mounting plate 300.

[0032] The second reinforcing rib group 600 has four right-angled trapezoidal plates, which are the reinforcing plates of the second reinforcing rib group 600. The two right-angled sides of the right-angled trapezoidal plates are respectively connected to the positioning base plate 100 and the nozzle assembly mounting plate 300.

[0033] The first reinforcing rib group 500 and the second reinforcing rib group 600 are used to strengthen the connection between the positioning base plate 100 and the nozzle assembly mounting plate 300, making the nozzle assembly mounting plate 300 more stable, thereby further avoiding misalignment during the welding process and further improving the usability of this technical solution.

[0034] like Figure 1-2As shown, it also includes: a first positioning component 700, which includes two positioning blocks and two locking blocks; the first positioning groove 200 is a square groove with rounded corners; two positioning blocks are respectively provided on the positioning base plate 100 on the outer side of two adjacent straight edges of the first positioning groove 200; and two locking blocks are respectively provided on the outer side of the positioning base plate 100 on the other two straight edges of the first positioning groove 200. The locking blocks are provided with screw holes.

[0035] In this technical solution, the positioning device also includes a first positioning component 700, which is used to position the flanged bend 101. The first positioning component 700 is arranged in four directions of the first positioning groove 200, including two positioning blocks and two locking blocks. Both locking blocks are provided with screw holes, and can be fixed by screwing screws into the locking blocks and making one end of the screw tightly against the flanged bend 101.

[0036] During installation, the flanged elbow 101 can first be pressed tightly against the two positioning blocks, and then the flanged elbow 101 can be tightened by screwing the screws into the locking blocks, thereby further fixing the flanged elbow 101. This setting further improves the stability of this technical solution.

[0037] like Figure 1-2 As shown, the nozzle assembly mounting plate 300 includes: an outer side plate 310, the lower end of which is connected to the upper surface of the positioning base plate 100; a mounting surface 320, which is embedded in the outer side plate 310; and a second positioning groove 400, which is a U-shaped groove, and is formed on the mounting surface 320.

[0038] In this technical solution, the nozzle assembly mounting plate includes an outer side plate 310 and a mounting surface 320.

[0039] The outer side plate 310 is used to vertically connect to the positioning base plate 100. The outer side plate 310 has a square groove, the mounting surface 320 is disposed in the square groove of the outer side plate 310, and the second positioning groove 400 is opened on the mounting surface 320.

[0040] Because the outer side plate 310 has a relatively simple and regular structure, this design facilitates the positioning of the base plate 100 and the outer side plate 310 as an integral part, further improving the stability of the technical solution.

[0041] Meanwhile, the mounting surface 320 is an irregularly shaped plate that needs to fit perfectly with the nozzle chamber 102. The method of producing it separately and then assembling it at the end facilitates mold opening and production, further improving the accuracy of this technical solution.

[0042] like Figure 1-2As shown, the nozzle assembly mounting plate 300 further includes a threaded hole assembly 330, which is arranged in an arc shape around the second positioning groove 400 and is opened on the mounting surface 320.

[0043] In this technical solution, the nozzle assembly mounting plate 300 also includes a threaded hole assembly 330. Since the component of the nozzle chamber 102 that is in close contact with the mounting surface 320 is a flange, the threaded hole assembly 330 mates with the threaded holes on the flange. The positioning device and the nozzle chamber 102 can be further connected through the threaded holes of the flange and the threaded hole assembly 330.

[0044] like Figure 1-2 As shown, the nozzle assembly mounting plate 300 further includes: a second positioning component 340, which includes two positioning blocks and a locking block. The second positioning component 340 is disposed on the outer side plate 310. The positioning blocks are provided at the lower end and one side of the mounting surface 320, and the locking block is provided on the other side of the mounting surface 320. The locking block has a screw hole.

[0045] In this technical solution, the spray assembly mounting plate also includes a second positioning component 340.

[0046] Because the second positioning groove 400 is a U-shaped groove, there is no installation space on the upper side of the groove. Therefore, the second positioning component 340 has two positioning blocks and one locking block. The two positioning blocks are respectively set below and to the side of the second positioning groove 400. During the installation process, the nozzle assembly is positioned in the height direction by the lower positioning block, and in the horizontal direction by the side positioning block. Finally, the positioning is completed by tightening the screw of the locking block.

[0047] like Figure 1-2 As shown, it also includes: a sliding component, wherein the locking block with the slope is disposed on the sliding component.

[0048] like Figure 1-2 As shown, the first positioning component 700 further includes: a slope, the slope being disposed on one of the locking blocks, the slope being disposed on the side of the locking block facing the first positioning groove 200; a sliding groove, the sliding groove being disposed on the positioning base plate 100, the locking block having the slope being disposed slidingly in the sliding groove; a top plate, one end of the sliding groove pointing towards the first positioning groove 200, the top plate being disposed at the other end of the sliding groove; and a spring, the two ends of the spring being respectively disposed on the top plate and the locking block having the slope.

[0049] In this technical solution, the first positioning component 700 also includes a slope, a sliding groove, a top plate, and a spring.

[0050] Because the first positioning component 700 has positioning blocks or locking blocks in all four directions, it is not easy to place the flanged bend 101. It may repeatedly get stuck on the edge of the positioning block or locking block. Therefore, a slope is added to one of the locking blocks. During the installation process, when the edge of the flanged bend 101 overlaps the slope, the slope can guide the flanged bend 101 to slide into the first positioning groove 200.

[0051] Furthermore, a sliding groove is provided, within which the locking block can slide, providing further installation space for the flanged bend 101.

[0052] Meanwhile, to ensure the functionality of the first positioning component 700, a top plate and a spring are provided so that the locking block can slide through the sliding groove and abut against the flanged bend 101 through the spring.

[0053] like Figure 1-2 As shown, according to a second aspect of the embodiments of this application, a steam injection nozzle assembly is provided, comprising: a flanged bend 101, the flanged bend 101 having a bent pipe, one end of the bent pipe being a first flange, and the other end of the bent pipe being a welded end; and a nozzle chamber 102, the nozzle chamber 102 having a connecting pipe and a second flange, the second flange being disposed at one end of the connecting pipe, and the second flange having a screw hole on its circumference.

[0054] In this technical solution, the steam injection nozzle assembly includes a flanged bend 101 and a nozzle chamber 102. After the flanged bend 101 and the nozzle chamber 102 are welded together, a steam injection nozzle assembly for the feedwater pump turbine is formed.

[0055] The flanged bend 101 includes a first flange and a bend. One end of the bend is provided with the first flange. The first flange is fixed to the positioning base plate 100 through the first positioning groove 200, thereby realizing the positioning of the flanged bend 101.

[0056] The nozzle chamber 102 includes a connecting pipe and a second flange. The connecting pipe is provided with a second flange at one end. The connecting pipe is placed in the second positioning groove 400 and the second flange is tightly attached to the nozzle assembly mounting plate 300 to achieve the positioning of the nozzle chamber 102. The end of the nozzle chamber 102 with the second flange is a welded end.

[0057] After the flanged bend and nozzle chamber 102 are fixed, their welded ends are positioned and joined, thus completing the welding positioning.

[0058] like Figure 3 As shown, a third aspect of the embodiments of this application provides a method for welding a steam injection nozzle assembly, which welds the steam injection nozzle assembly as described above using a steam injection nozzle assembly positioning component as described in any of the above claims, including: Step 201: Fix one end of the flanged bend 101 with the first flange to the first positioning groove 200; Step 202: Fix the connecting pipe of the nozzle chamber 102 to the second positioning groove 400; Step 203: Place the second flange onto one side of the nozzle assembly mounting plate 300; Step 204: Weld the welded end of the bent pipe and the end of the connecting pipe on which the second flange is installed.

[0059] The aforementioned steam injection nozzle group positioning device also includes: The first flange is fixed by a positioning device; The second flange is fixed by a positioning device; The second flange is further secured using annular bolt holes.

[0060] In this technical solution, the component for fixing the first flange in the positioning device is the first positioning component 700. The component for fixing the second flange in the positioning device is the second positioning component 340. This step is used to position the second flange. At this time, the axial movement of the second flange is still possible. Therefore, an additional method is used to position the second flange axially by using an annular threaded hole to engage with the threaded hole on the second flange itself. In this embodiment, the annular threaded hole group is the threaded hole group 330.

[0061] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0063] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positioning device for a steam injection nozzle assembly, characterized in that, include: Positioning base plate; The first positioning groove is formed in the positioning base plate and is used to install a flanged bend. A nozzle assembly mounting plate is disposed on the upper surface of the positioning base plate; The second positioning groove is formed on the nozzle assembly mounting plate and is used to install the nozzle chamber assembly. The support rod includes an extension rod and an arc-shaped bracket. One end of the extension rod is connected to the positioning base plate, and the other end of the extension rod is connected to the arc-shaped bracket, which is used to support the flanged bend.

2. The positioning device for the steam injection nozzle assembly according to claim 1, characterized in that, Also includes: The first reinforcing rib group is disposed on the front surface of the nozzle assembly mounting plate, and the first reinforcing rib group has two reinforcing plates. The second reinforcing rib group is disposed on the rear surface of the nozzle assembly mounting plate, and the second reinforcing rib group has four reinforcing plates.

3. The positioning device for the steam injection nozzle assembly according to claim 1, characterized in that, Also includes: The first positioning component includes two positioning blocks and two locking blocks. The first positioning groove is a square groove with rounded corners. The positioning base plate on the outer side of two adjacent straight edges of the first positioning groove is provided with two positioning blocks respectively, and the positioning base plate on the outer side of the other two straight edges of the first positioning groove is provided with two locking blocks respectively. The locking block is provided with screw holes.

4. The positioning device for the steam injection nozzle assembly according to claim 1, characterized in that, The nozzle assembly mounting plate includes: An outer side plate, the lower end of which is connected to the upper surface of the positioning base plate; The mounting surface is embedded in the outer side plate, and the second positioning groove is a U-shaped groove, which is formed on the mounting surface.

5. The positioning device for the steam injection nozzle assembly according to claim 4, characterized in that, The nozzle assembly mounting plate also includes: A set of threaded holes is arranged in an arc shape around the second positioning groove and is formed on the mounting surface.

6. The positioning device for the steam injection nozzle assembly according to claim 4, characterized in that, The nozzle assembly mounting plate also includes: The second positioning component includes two positioning blocks and a locking block. The second positioning component is disposed on the outer side plate. The positioning blocks are provided at the lower end and one side of the mounting surface, and the locking block is provided on the other side of the mounting surface. The locking block has a screw hole.

7. The positioning device for the steam injection nozzle assembly according to claim 3, characterized in that, Also includes: A slope is provided on one of the locking blocks, the slope being provided on the side of the locking block facing the first positioning groove.

8. The positioning device for the steam injection nozzle assembly according to claim 7, characterized in that, Also includes: The sliding component has a locking block with a slope disposed on it.

9. The positioning device for the steam injection nozzle assembly according to claim 8, characterized in that, The sliding component includes: A sliding groove is provided on the positioning base plate, and the locking block with the slope surface slides in the sliding groove; The top plate has one end of the sliding groove pointing to the first positioning groove, and the top plate is disposed at the other end of the sliding groove; A spring, with its two ends respectively disposed on the top plate and a locking block having the slope.

10. A steam injection nozzle assembly, characterized in that, include: A flanged bend has a bent pipe, one end of which is a first flange and the other end of which is a welded end; The nozzle chamber has a connecting pipe and a second flange, the second flange being disposed at one end of the connecting pipe, and the second flange having threaded holes on its circumference.

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