Auxiliary welding device for stator blade of steam turbine

Abstract

The utility model relates to the technical field of steam turbine production, in particular to a steam turbine stator blade welding auxiliary device, which comprises a base, a sleeve seat, an insertion rod, an adjusting knob, a screw rod, an adjusting mechanism, a pressure applying mechanism, a mounting seat and a stator blade, and is characterized in that the sleeve seat and the insertion rod are fixedly arranged on the upper surface of the base, and the adjusting knob is in threaded connection with the top of the insertion rod; the screw rod is fixedly arranged at the top of the inserting rod, the top of the inserting rod is sleeved with the adjusting mechanism, and the pressure applying mechanism is arranged at the top of the adjusting mechanism in a clamped mode. Therefore, it is guaranteed that the stator blades are welded and fixed at the same angle and the same height on the inner side of the mounting base, proper limiting clamping bases are selected according to distribution of the stator blades, the stator blades at different positions can be conveniently and rapidly switched in the welding process, the production efficiency is improved, and the welding effect and the internal flow guide effect of a steam turbine are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine manufacturing technology, and in particular to a welding auxiliary device for steam turbine stationary blades. Background Technology

[0002] The main functions of stationary blades in steam turbines include guiding steam flow, accelerating steam, and acting as nozzles in reaction turbines. Stationary blades are fixed to diaphragms or guide vane rings and remain stationary; their primary function is to guide steam flow and accelerate steam.

[0003] The turbine stationary blades are fixed to the guide vane retaining ring surface by welding. The fixed stationary blades need to maintain the same height and fixed rotation angle, which makes the clamping during welding quite difficult. When switching the stationary blades to be welded, the existing clamping equipment needs to adjust the impact device, which can easily cause changes in the angle and height of the stationary blades, affecting the welding effect and the flow guiding quality. Therefore, it is necessary to ensure the clamping height and clamping angle of the stationary blades while facilitating the switching of welding positions. Utility Model Content

[0004] This utility model addresses the deficiencies in the existing technology by providing an auxiliary device for welding stationary blades of a steam turbine.

[0005] This utility model is achieved through the following technical solution:

[0006] A turbine stationary blade welding auxiliary device includes a base, a sleeve, a plug rod, an adjusting knob, a screw, an adjusting mechanism, a pressure applying mechanism, a mounting base, and stationary blades. The sleeve and the plug rod are fixedly mounted on the upper surface of the base. The adjusting knob is threadedly connected to the top of the plug rod. The screw is fixedly mounted on the top of the plug rod. The adjusting mechanism is sleeved on the top of the plug rod. The pressure applying mechanism is clamped on the top of the adjusting mechanism. The mounting base is clamped on the top of the sleeve. The stationary blade is clamped inside one end of the pressure applying mechanism. The pressure applying mechanism includes a retaining shaft, a contact seat, a limiting plug, a guide tube, a telescopic rod, a pressure plate, a spring, and a retaining sleeve. The contact seat is fixedly mounted on the surface of the retaining shaft. The limiting plug is fixedly mounted on the outside of the contact seat. The guide tube is fixedly mounted on the top of the retaining shaft. The telescopic rod is clamped inside the guide tube. The pressure plate is fixedly mounted outside the telescopic rod. The spring is sleeved on the surface of the telescopic rod. The retaining sleeve is fixedly mounted at the end of the telescopic rod.

[0007] In a preferred embodiment of the present invention, the adjustment mechanism includes an insertion tube, a fixing rod, a limiting seat, and a support seat. The fixing rod is fixedly disposed on the top of the insertion tube, the limiting seat is fixedly connected to the surface of the fixing rod, and the support seat is fixedly disposed on the top of the fixing rod.

[0008] The adjustment mechanism is mainly used to support the pressure application mechanism and facilitates the adjustment and limiting of the pressure application mechanism, as well as the switching of welding areas.

[0009] In a preferred embodiment of this utility model, the insertion rod is a splined shaft, a slot is provided at the bottom of the insertion tube to cooperate with it, the top of the screw passes through and extends to the outside of the top of the insertion tube, and a locking nut is provided on the surface of the screw.

[0010] In a preferred embodiment of the present invention, a limiting slot is provided on the top of the limiting slot, and a card block is provided at the bottom of one end of the limiting insert block to cooperate with it.

[0011] The splined shaft-shaped insert facilitates the positioning of the adjustment mechanism, the screw is locked inside the insert tube to ensure the installation position of the adjustment mechanism, and the locking nut ensures the fixing effect of the adjustment mechanism.

[0012] In a preferred embodiment of this utility model, the guide tube is a square tube, the telescopic rod is a square rod with a cross-section that matches the guide tube, a limiting piece is provided at one end of the guide tube, and a spring is provided between the limiting piece at one end of the guide tube and the pressure plate.

[0013] The square tube prevents the telescopic rod from rotating inside the guide tube, thus ensuring the angle of the clamp at the end of the telescopic rod during adjustment, thereby ensuring the angle of the stationary blade.

[0014] In a preferred embodiment of this utility model, the top of the adjustment knob contacts the inner side of the top of the insertion tube, the top of the fixing rod and the surface of the support base are provided with insertion holes that cooperate with the locking shaft, and the upper surface of the support base is in contact with the bottom of the contact base.

[0015] Adjusting the height of the adjustment knob at the top of the sleeve can adjust the installation height of the insertion tube at the top of the sleeve, thereby adjusting the height of the clamped stationary blade and ensuring that the stationary blade is welded to the appropriate height inside the mounting base.

[0016] The beneficial effects of this utility model are:

[0017] This turbine stationary blade welding auxiliary device can effectively clamp the stationary blades and adjust them to a suitable height, thereby ensuring that the stationary blades are welded and fixed at the same angle and height inside the mounting base. According to the distribution of the stationary blades, a suitable limit holder can be selected to facilitate the rapid switching of stationary blades at different positions during the welding process, thereby improving production efficiency and ensuring welding effect and internal flow guidance effect of the turbine. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the auxiliary device for welding stationary blades of a steam turbine according to the present invention.

[0019] Figure 2 This is a schematic diagram of the base structure of the turbine stationary blade welding auxiliary device of this utility model;

[0020] Figure 3This is a schematic diagram of the pressure application mechanism installation structure of the turbine stationary blade welding auxiliary device of this utility model;

[0021] Figure 4 This is a schematic diagram of the adjustment mechanism of the auxiliary device for welding stationary blades of a steam turbine according to the present invention.

[0022] Figure 5 This is a schematic diagram of the pressure application mechanism of the auxiliary device for welding stationary blades of the steam turbine according to the present invention.

[0023] In the diagram: 1. Base; 2. Sleeve; 3. Insert rod; 4. Adjustment knob; 5. Screw; 6. Adjustment mechanism; 61. Insert tube; 62. Fixing rod; 63. Limiting seat; 64. Support seat; 7. Pressure applying mechanism; 71. Locking shaft; 72. Contact seat; 73. Limiting block; 74. Guide tube; 75. Telescopic rod; 76. Pressure plate; 77. Spring; 78. Sleeve; 8. Mounting seat; 9. Stationary blade. Detailed Implementation

[0024] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0025] like Figure 1-5 The turbine stationary blade welding auxiliary device shown includes a base 1, a sleeve 2, a plug rod 3, an adjusting knob 4, a screw 5, an adjusting mechanism 6, a pressure applying mechanism 7, a mounting base 8, and a stationary blade 9. The sleeve 2 and the plug rod 3 are fixedly mounted on the upper surface of the base 1. The adjusting knob 4 is threadedly connected to the top of the plug rod 3. The screw 5 is fixedly mounted on the top of the plug rod 3. The adjusting mechanism 6 is sleeved on the top of the plug rod 3. The pressure applying mechanism 7 is engaged with the top of the adjusting mechanism 6. The mounting base 8 is engaged with the top of the sleeve 2. The stationary blade 9 is engaged inside one end of the pressure applying mechanism 7. The pressure applying mechanism 7 includes a retaining shaft 71, a contact seat 72, a limiting block 73, a guide tube 74, a telescopic rod 75, a pressure plate 76, a spring 77, and a retaining sleeve 78. The contact seat 72 is fixedly disposed on the surface of the retaining shaft 71, the limiting block 73 is fixedly disposed on the outside of the contact seat 72, the guide tube 74 is fixedly disposed on the top end of the retaining shaft 71, the telescopic rod 75 is clamped on the inside of the guide tube 74, the pressure plate 76 is fixedly disposed on the outside of the telescopic rod 75, the spring 77 is sleeved on the surface of the telescopic rod 75, and the retaining sleeve 78 is fixedly disposed on the end of the telescopic rod 75.

[0026] Specifically, the adjusting mechanism 6 includes an insertion tube 61, a fixing rod 62, a limiting seat 63, and a support seat 64. The fixing rod 62 is fixedly mounted on the top of the insertion tube 61, the limiting seat 63 is fixedly connected to the surface of the fixing rod 62, and the support seat 64 is fixedly mounted on the top of the fixing rod 62. The insertion rod 3 is a splined shaft, and a slot for it is provided at the bottom of the insertion tube 61. The top of the screw 5 passes through and extends to the outer side of the top of the insertion tube 61, and a locking nut is provided on the surface of the screw 5. A limiting nut is provided at the top of the limiting seat 63. The card slot has a locking block at one end of the limiting insert 73. The guide tube 74 is a square tube. The telescopic rod 75 is a square rod with a cross-section that matches the guide tube 74. A limiting piece is provided at one end of the guide tube 74. A spring 77 is located between the limiting piece at one end of the guide tube 74 and the pressure plate 76. The top of the adjusting knob 4 contacts the inner side of the top of the insert tube 61. The top of the fixing rod 62 and the surface of the support base 64 have insertion holes that match the locking shaft 71. The upper surface of the support base 64 is in contact with the bottom of the contact seat 72.

[0027] In this embodiment, during use, the mounting base 8 to be welded is first clamped into the slot on the top of the sleeve 2 that mates with the mounting base 8 for limiting. Then, the insertion tube 61 is sleeved on the top of the sleeve 2, and the bottom of the clamping shaft 71 is clamped into the insertion hole on the top of the fixing rod 62 until the bottom of the contact seat 72 is in contact with the upper surface of the support seat 64. Based on the height of the clamping sleeve 78 at the end of the telescopic rod 75, the height of the stationary blade 9 clamped inside the clamping sleeve 78 on the inner side of the mounting base 8 is determined. If height adjustment is required, simply pull out the insertion tube 61 and adjust the height of the adjusting knob 4 on the top of the insertion rod 3 to adjust the depth of the insertion tube 61 inserted into the insertion rod 3, thereby adjusting the clamping height of the stationary blade 9. After adjustment, tighten the locking nut on the surface of the screw 5 to position and lock the insertion tube 61.

[0028] Furthermore, by grasping the handle at one end of the telescopic rod 75 and controlling the handle to move backward, the pressure plate 76 compresses and contracts the spring 77, locking the stationary blade 9 into the slot at the end of the sleeve 78. After releasing the handle at the end of the telescopic rod 75, the spring 77 presses one end of the stationary blade 9 into the inner side of the mounting base 8, thus facilitating welding. Since the guide tube 74 is a square tube and the telescopic rod 75 is a square rod that matches it, the telescopic rod 75 is effectively limited, effectively preventing the stationary blade 9 from angular deviation during use. After welding a single stationary blade 9, lift the retaining shaft 71 upward and rotate the retaining shaft 71 to adjust the limiting insert 73 fixed on the outside of the contact seat 72 to engage in different limiting slots on the surface of the limiting retaining seat 63. This allows for rapid switching of the welding area, enabling uniform welding of the stationary blade 9 at the same angle and height inside the mounting base 8, ensuring the installation quality of the stationary blade 9.

[0029] It should be noted that the parts not covered in this utility model are the same as or can be implemented using existing technology; the various drives in this utility model can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0030] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A welding auxiliary device for steam turbine stationary blade, comprising a base (1), a sleeve (2), a plug rod (3), an adjusting knob (4), a screw rod (5), an adjusting mechanism (6), a pressure applying mechanism (7), a mounting seat (8) and a stationary blade (9), characterized in that: The sleeve (2) and the plug rod (3) are fixedly arranged on the upper surface of the base (1), the adjusting knob (4) is in threaded connection with the top of the plug rod (3), the screw rod (5) is fixedly arranged on the top of the plug rod (3), the adjusting mechanism (6) is sleeved on the top of the plug rod (3), the pressing mechanism (7) is clamped on the top of the adjusting mechanism (6), the mounting seat (8) is clamped on the top of the sleeve (2), and the static blade (9) is clamped in the inner end of the pressing mechanism (7). The pressing mechanism (7) comprises a clamping shaft (71), a contact seat (72), a limiting plug block (73), a guide pipe (74), a telescopic rod (75), a pressing plate (76), a spring (77) and a clamping sleeve (78), the contact seat (72) is fixedly arranged on the surface of the clamping shaft (71), the limiting plug block (73) is fixedly arranged on the outer side of the contact seat (72), the guide pipe (74) is fixedly arranged on the top end of the clamping shaft (71), the telescopic rod (75) is clamped on the inner side of the guide pipe (74), the pressing plate (76) is fixedly arranged on the outer side of the telescopic rod (75), the spring (77) is sleeved on the surface of the telescopic rod (75), and the clamping sleeve (78) is fixedly arranged on the end portion of the telescopic rod (75).

2. The turbine vane welding assist device of claim 1, wherein: The adjusting mechanism (6) comprises a plug pipe (61), a fixed rod (62), a limiting clamping seat (63) and a supporting seat (64), the fixed rod (62) is fixedly arranged on the top of the plug pipe (61), the limiting clamping seat (63) is fixedly connected with the surface of the fixed rod (62), and the supporting seat (64) is fixedly arranged on the top end of the fixed rod (62).

3. The turbine vane welding assist device of claim 2, wherein: The plug rod (3) is a spline shaft, the bottom of the plug pipe (61) is provided with a plug groove matched with the plug pipe (61), the top of the screw rod (5) penetrates and extends to the outside of the top of the plug pipe (61), and the surface of the screw rod (5) is provided with a locking nut.

4. The turbine vane welding assist device of claim 2, wherein: The limiting clamping seat (63) is provided with a limiting clamping groove in the top, and one end of the limiting plug block (73) is provided with a clamping block matched with the limiting clamping groove.

5. The turbine vane welding assist device of claim 1, wherein: The guide pipe (74) is a square pipe, the telescopic rod (75) is a square rod with a cross section matched with the guide pipe (74), one end of the guide pipe (74) is provided with a limiting piece, and the spring (77) is arranged between the limiting piece of one end of the guide pipe (74) and the pressing plate (76).

6. The turbine vane welding assist device of claim 2, wherein: The top of the adjusting knob (4) is in contact with the inner side of the top of the plug pipe (61), the top of the fixed rod (62) and the surface of the supporting seat (64) are provided with plug holes matched with the clamping shaft (71), and the upper surface of the supporting seat (64) is attached to the bottom of the contact seat (72).

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