Nozzle device of impulse turbine

Abstract

The utility model relates to a nozzle device of an impulse turbine. The impulse turbine nozzle device comprises a spray pipe, an adjusting mechanism, a nozzle, a spray needle and a lining. The adjusting mechanism is installed in the spray pipe. The nozzle is of a conical hollow structure with two open ends. The large end of the nozzle is hermetically connected with one end of the spray pipe. And the end part of the large end of the spray needle is detachably connected with the end part of one end of the adjusting mechanism. And the spray needle is configured to integrally penetrate through the port of the small end of the nozzle. The lining is detachably installed in a port of the small end of the nozzle in a sealed mode and can make contact with the surface of the spray needle in a sealed mode. The bush is disposed so as to be entirely detachable from the small end side of the nozzle. According to the impulse turbine nozzle device, quick-wear parts such as the lining and the spray needle can be overhauled and replaced without disassembling the whole device, mounting and dismounting of the lining and the nozzle in an easy-wear power station are facilitated, the maintenance efficiency of the power station is greatly improved, and the economic benefit of the power station is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine machinery, in particular to an impact type water turbine nozzle device. Background Art

[0002] my country is a country rich in water resources. As an energy conversion device that utilizes water resources, water turbines are mainly divided into two types, one is the reaction turbine and the other is the impulse turbine. For the impulse turbine, the nozzle device is installed at the end of the impulse turbine pressure pipe and has the kinetic energy to adjust the flow of the unit. The coordination stability of the nozzle device body structure and the deflector and relay directly affects the stability of the unit.

[0003] Conventional nozzle devices (such as Figure 1 ), usually the nozzle bushing 2 and the nozzle 4 are both of built-in structure, that is, the nozzle 4 equipped with the nozzle bushing 2 is directly driven in and fixed from the left side of the spray needle 3, and the spray needle 3 is connected to the adjustment mechanism cylinder body 6 by the bolt 5 in the relay cylinder body 6. Therefore, it is impossible to replace the nozzle bushing 2 and the spray needle 3 without disassembling the nozzle device, which makes it difficult to repair and replace the nozzle bushing 2, the spray needle 3 and other wearing parts. Utility Model Content

[0004] Since the conventional impulse turbine nozzle device has the problem that the nozzle needle, bushing and other wearing parts are difficult to repair and replace, it is necessary to provide an impulse turbine nozzle device that is easy to repair and replace.

[0005] A nozzle device for an impulse turbine, comprising:

[0006] Nozzle;

[0007] an adjusting mechanism installed in the nozzle;

[0008] The nozzle is a conical hollow structure with two ends open; the large end of the nozzle is sealed and connected to one end of the nozzle pipe;

[0009] A spray needle, the end of the large end of which is detachably connected to the end of one end of the adjustment mechanism; the spray needle is configured to be able to pass through the port of the small end of the nozzle as a whole;

[0010] The bushing is detachably and sealingly installed in the port of the small end of the nozzle and can be in sealing contact with the surface of the spray needle; the bushing is configured to be detachable from the small end side of the nozzle as a whole.

[0011] In some embodiments, one of the end of one end of the adjustment mechanism and the end of the large end of the spray needle is provided with a threaded hole, and the other is provided with a threaded column; the threaded column is passed through the threaded hole and threadedly cooperates with the threaded hole to detachably connect the spray needle and the adjustment mechanism.

[0012] In some embodiments, a fastening locking member is threadedly connected to the side wall of the adjusting mechanism or the spray needle provided with the threaded hole; one end of the fastening locking member abuts against the threaded column to lock the spray needle on the adjusting mechanism.

[0013] In some embodiments, the threaded column includes a coaxially arranged smooth section and a threaded section; the outer diameter of the smooth section is larger than the outer diameter of the threaded section; the threaded hole includes a coaxially arranged light hole section and a screw hole section; the inner diameter of the light hole section is larger than the inner diameter of the threaded hole;

[0014] The threaded column passes through the light hole section and is threadedly matched with the screw hole section; the smooth section is inserted into the smooth section of the light hole section; a locking screw hole is opened on the side wall of the light hole section; one end of the fastening locking piece is threadedly connected to the locking screw hole, and the other end is abutted against the surface of the smooth section.

[0015] In some embodiments, an elastic seal is sandwiched between an end surface of one end of the adjustment mechanism and an end surface of the large end of the spray needle; the elastic seal is arranged along the circumference of the threaded column.

[0016] In some embodiments, an edge portion of the inner wall of the small end of the nozzle is provided with a mounting groove along the circumferential direction; an outer wall of the bushing is provided with a mounting portion along the circumferential direction; and the mounting portion is sealed and installed in the mounting groove;

[0017] The impulse turbine nozzle device further comprises a pressing plate in an annular plate-shaped structure; the pressing plate is detachably connected to the end surface of the small end of the nozzle and abuts against the axial end surface of the mounting portion.

[0018] In some embodiments, an elastic sealing ring is sandwiched between the outer wall of the mounting portion and the inner wall of the mounting groove; and / or

[0019] The bushing includes a first section, a second section and a third section which are connected in sequence and coaxially arranged; the mounting portion is located on the outer wall of the second section; the first section passes through the mounting groove and abuts against the inner wall of the small end of the nozzle; the pressure plate is sleeved on the third section and is detachably connected to the end face of the small end of the nozzle to press the mounting portion tightly into the mounting groove.

[0020] In some embodiments, a flange adjustment gasket is installed at one end of the nozzle away from the nozzle.

[0021] In some embodiments, the adjusting mechanism includes an adjusting cylinder, a piston rod, a connecting cylinder and a self-locking nut; the adjusting cylinder is a hollow structure with openings at both ends; a partition structure is provided in the adjusting cylinder to divide the space in the adjusting cylinder into a first chamber and a second chamber; a connecting hole connecting the first chamber and the second chamber is provided on the partition structure; the connecting cylinder can be slidably penetrated into the first chamber; one end of the connecting cylinder is located outside the adjusting cylinder, and its end is detachably connected to the end of the large end of the spray needle; the other end of the connecting cylinder is connected to the piston rod; the end of the piston rod away from the connecting cylinder can be slidably penetrated into the connecting hole and extend into the second chamber; the self-locking nut is located in the second chamber and is threaded on the piston rod.

[0022] In some embodiments, a relay is also included; the relay is detachably mounted on the nozzle and / or the nozzle.

[0023] In the actual use of the above-mentioned impulse turbine nozzle device, when the bushing needs to be repaired and replaced, it is only necessary to remove the bushing from the small end side of the nozzle for replacement; when the spray needle needs to be repaired and replaced, it is necessary to first remove the bushing from the small end side of the nozzle, and then remove the spray needle from the adjustment mechanism and take it out from the small port of the nozzle for replacement, and then install the bushing at the port of the small end of the nozzle. Therefore, the above-mentioned impulse turbine nozzle device can repair and replace the bushing, spray needle and other wearing parts without disassembling the entire device, which is conducive to the installation and removal of bushings and nozzles in easily worn power stations, greatly improving the maintenance efficiency of the power station, and thus facilitating the improvement of the economic benefits of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a traditional nozzle device in the background technology of the utility model;

[0025] Figure 2 This is a schematic structural diagram of an impulse turbine nozzle device in a preferred embodiment of the utility model;

[0026] Figure 3 for Figure 2 A schematic diagram of the structure of the regulating mechanism in the nozzle device of the impulse turbine shown;

[0027] Figure 4 for Figure 2 A schematic diagram of the structure of the spray needle in the impulse turbine nozzle device shown;

[0028] Figure 5 for Figure 2 A schematic diagram of the structure of a nozzle in a nozzle device of an impulse turbine is shown;

[0029] Figure 6for Figure 2 A schematic diagram of the structure of the bushing in the impulse turbine nozzle device is shown.

[0030] Explanation of reference numerals: 100, impulse turbine nozzle device; 110, nozzle; 120, adjustment mechanism; 121, threaded hole; 1211, light hole section; 1212, screw hole section; 122, adjustment cylinder; 1221, partition structure; 1222, first chamber; 1223, second chamber; 123, piston rod; 124, connecting cylinder; 125, self-locking nut; 126, locking screw hole; 130, nozzle; 131, mounting groove; 140 , spray needle; 141, threaded column; 1411, smooth section; 1412, threaded section; 142, sealing groove; 150, bushing; 151, mounting portion; 1511, sealing groove; 152, first section; 153, second section; 154, third section; 160, fastening locking member; 170, elastic sealing member; 180, elastic sealing ring; 190, pressure plate; 201, adjusting gasket; 202, relay; 203, deflector; 204, rotating arm. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or there can be an intermediate element. It is also understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or there can be one or more intermediate elements.

[0034] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0035] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0036] Figure 2 The structure of the impulse turbine nozzle device in one embodiment of the utility model is shown. For the convenience of description, the accompanying drawings only show the structure related to the embodiment of the utility model.

[0037] See also Figure 2 The impulse turbine nozzle device 100 in the preferred embodiment of the utility model includes a nozzle 110, an adjustment mechanism 120, a nozzle 130, a spray needle 140 and a bushing 150.

[0038] The adjustment mechanism 120 is installed in the nozzle 110. The nozzle 130 is a conical hollow structure with two ends open. The large end of the nozzle 130 is sealed and connected to one end of the nozzle 110. The spray needle 140 is a pointed cone structure. The end of the large end of the spray needle 140 is detachably connected to the end of one end of the adjustment mechanism 120. The spray needle 140 is configured to be able to pass through the port of the small end of the nozzle 130 as a whole. The bushing 150 is detachably and sealably installed in the port of the small end of the nozzle 130, and can be in sealing contact with the surface of the spray needle 140. The bushing 150 is configured to be able to be removed from the small end side of the nozzle 130 as a whole.

[0039] In actual applications, the adjustment mechanism 120 is used to drive the spray needle 140 to move in the direction of the central axis of the nozzle 110 until a gap is formed between the spray needle 140 and the inner wall of the bushing 150, or the spray needle 140 is in sealing contact with the inner wall of the bushing 150 to open or close the port at the small end of the nozzle 130, so as to achieve the purpose of adjusting the flow rate of the unit.

[0040] As described in the background art, in a power station prone to wear, the bushing 150 and the nozzle 130 are both vulnerable parts, which will inevitably wear out after long-term use. To ensure the reliability of the unit operation, these vulnerable parts need to be repaired and replaced in a timely manner.

[0041] When the bushing 150 needs to be repaired and replaced, it is only necessary to remove the bushing 150 from the small end side of the nozzle 130 for replacement; when the spray needle 140 needs to be repaired and replaced, it is necessary to first remove the bushing 150 from the small end side of the nozzle 130, then remove the spray needle 140 from the adjustment mechanism 120 and take it out from the small port of the nozzle 130 for replacement, and then install the bushing 150 at the port of the small end of the nozzle 130. In this way, the above-mentioned impulse turbine nozzle device 100 can repair and replace the bushing 150, the spray needle 140 and other wearing parts without disassembling the entire device, which is conducive to the installation and removal of the bushing 150 and the nozzle 130 in the easily worn power station, greatly improving the maintenance efficiency of the power station, and thus facilitating the improvement of the economic benefits of the power station.

[0042] Please also read Figure 3 and Figure 4 In some embodiments, one of the end of one end of the adjustment mechanism 120 and the end of the large end of the spray needle 140 is provided with a threaded hole 121, and the other is provided with a threaded column 141. The threaded column 141 is inserted into the threaded hole 121 and threadably matched with the threaded hole 121 to detachably connect the spray needle 140 and the adjustment mechanism 120.

[0043] Specifically, when the threaded hole 121 is located on the end surface of one end of the adjustment mechanism 120, the threaded column 141 is located at the end of the large end of the spray needle 140; when the threaded hole 121 is located on the end surface of the large end of the spray needle 140, the threaded column 141 is located at the end of one end of the adjustment mechanism 120. In this way, in actual application, the staff only needs to twist the small end of the spray needle 140 to remove the spray needle 140 from the adjustment mechanism 120 or install it on the adjustment mechanism 120, making the inspection and replacement of the spray needle 140 easier.

[0044] Of course, in other embodiments, the spray needle 140 and the adjustment mechanism 120 can be detachably connected in other ways, as long as the staff removes the spray needle 140 from the adjustment mechanism 120 and takes it out from the port at the small end of the nozzle 130 without disassembling the nozzle 130 and other structures.

[0045] Furthermore, in some embodiments, a fastening locking member 160 is threadedly connected to the side wall of the adjusting mechanism 120 or the spray needle 140 with the threaded hole 121. One end of the fastening locking member 160 abuts against the threaded column 141 to lock the spray needle 140 on the adjusting mechanism 120.

[0046] That is, when the threaded hole 121 is located on the end face of the large end of the spray needle 140, a locking screw hole 126 is opened on the side wall of the large end of the spray needle 140, one end of the fastening locking member 160 is screwed into the locking screw hole 126, and the other end is abutted against the threaded column 141 screwed into the threaded hole 121; when the threaded hole 121 is located at one end of the adjusting mechanism 120, a locking screw hole 126 is opened on the side wall of one end of the adjusting mechanism 120, one end of the fastening locking member 160 is screwed into the locking screw hole 126, and the other end is abutted against the threaded column 141 screwed into the threaded hole 121. In this way, when the threaded column 141 is installed in place in the threaded hole 121, the fastening locking piece 160 can be screwed until the fastening locking piece 160 and the threaded column 141 are abutted to prevent the threaded column 141 from loosening in the threaded hole 121, thereby playing a role of stopping and loosening, and ensuring the reliability of the connection between the spray needle 140 and the adjustment mechanism 120.

[0047] Furthermore, in some embodiments, the threaded column 141 includes a coaxially arranged smooth section 1411 and a threaded section 1412. The outer diameter of the smooth section 1411 is greater than the outer diameter of the threaded section 1412. The threaded hole 121 includes a coaxially arranged light hole section 1211 and a screw hole section 1212. The inner diameter of the light hole section 1211 is greater than the inner diameter of the screw hole 121.

[0048] The threaded column 141 passes through the light hole section 1211 and is threadedly matched with the screw hole section 1212. The smooth section 1411 is inserted into the light hole section 1211. The side wall of the light hole section 1211 is provided with a locking screw hole 126. One end of the fastening locking member 160 is threadedly connected to the locking screw hole 126, and the other end is against the surface of the smooth section 1411.

[0049] In this way, when the threaded segment 1412 is passed through the light hole segment 1211 and screwed into the screw hole segment 1212, the axial end surface of the smooth segment 1411 close to one end of the threaded segment 1412 and the axial end surface of the light hole segment 1211 close to one end of the screw hole segment 1212 cooperate with each other, so as to limit the position of the threaded segment 1412 in the screw hole segment 1212, so as to improve the installation accuracy of the nozzle 130 on the adjustment mechanism 120.

[0050] At the same time, the fastening locking member 160 abuts against the smooth section 1411 , which can avoid damage to the external thread on the threaded column 141 and improve the stopping effect of the fastening locking member 160 .

[0051] Further, in some embodiments, an elastic seal 170 is sandwiched between the end surface of one end of the adjustment mechanism 120 and the end surface of the large end of the spray needle 140. The elastic seal 170 is arranged along the circumference of the threaded column 141. The elastic seal 170 is an annular structure arranged along the circumference of the threaded column 141. The provision of the elastic seal 170 can improve the sealing performance of the connection between the spray needle 140 and the adjustment mechanism 120.

[0052] Specifically, a sealing groove 142 is formed in the circumferential direction on the end surface of the large end of the spray needle 140, and the elastic sealing member 170 is installed in the sealing groove 142 and clamped between the inner wall of the sealing groove 142 and the end surface of one end of the adjustment mechanism 120. The provision of the sealing groove 142 makes the installation of the elastic sealing member 170 more convenient, and can also reduce the probability of the elastic sealing member 170 sliding, thereby improving the sealing reliability of the elastic sealing member 170.

[0053] Please also read Figure 5 and Figure 6 In some embodiments, a mounting groove 131 is provided along the circumferential direction at the edge of the inner wall of the small end of the nozzle 130 . A mounting portion 151 is provided along the circumferential direction on the outer wall of the bushing 150 . The mounting portion 151 is sealed and inserted into the mounting groove 131 .

[0054] Please refer again Figure 2 The impulse turbine nozzle device 100 further includes a pressing plate 190 in an annular plate structure. The pressing plate 190 is detachably connected to the end surface of the small end of the nozzle 130 and abuts against the axial end surface of the mounting portion 151.

[0055] Thus, when the bushing 150 needs to be installed on the small end of the nozzle 130, the bushing 150 is first sealed and inserted into the installation groove 131, and then the pressing plate 190 is installed on the end surface of the small end of the nozzle 130, so that the bushing 150 is pressed tightly into the installation groove 131 by the pressing plate 190 to prevent the bushing 150 from being loosened from the installation groove 131, thereby improving the reliability of the installation of the bushing 150. When the bushing 150 needs to be removed from the nozzle 130, only the pressing plate 190 needs to be removed from the nozzle 130, and then the bushing 150 can be pulled out of the installation groove 131, which is convenient and quick.

[0056] Furthermore, in some embodiments, an elastic sealing ring 180 is sandwiched between the outer wall of the mounting portion 151 and the inner wall of the mounting groove 131. The elastic sealing ring 180 can achieve sealing at the connection between the bushing 150 and the nozzle 130, thereby improving the sealing effect between the two.

[0057] Specifically, a sealing groove 1511 is circumferentially formed on the outer wall of the mounting portion 151 , and the elastic sealing ring 180 is installed in the sealing groove 1511 . The elastic sealing groove 1511 is clamped between the inner wall of the sealing groove 1511 and the inner wall of the mounting groove 131 to improve the sealing reliability of the elastic sealing ring 180 .

[0058] Further, in some embodiments, the bushing 150 includes a first section 152, a second section 153, and a third section 154 that are sequentially connected and coaxially arranged. The mounting portion 151 is located on the outer wall of the second section 153. The first section 152 passes through the mounting groove 131 and abuts against the inner wall of the small end of the nozzle 130. The pressing plate 190 is sleeved on the third section 154 and is detachably connected to the end surface of the small end of the nozzle 130 to press the mounting portion 151 into the mounting groove 131.

[0059] In this way, the mounting portion 151 and the first section 152 are respectively clamped in the mounting groove 131 and the small end of the nozzle 130 to increase the contact area between the bushing 150 and the nozzle 130 and to improve the connection stability between the bushing 150 and the nozzle 130. In addition, the pressing plate 190 is sleeved on the third section 154 to improve the installation convenience of the pressing plate 190 and increase the contact area between the pressing plate 190 and the bushing 150 to further improve the stability and reliability of the installation of the bushing 150.

[0060] In some embodiments, a flange adjustment gasket 201 is installed at one end of the nozzle 110 away from the nozzle 130. The provision of the flange adjustment gasket 201 solves the problem of difficulty in horizontal adjustment of the nozzle 110 during installation in the traditional nozzle 130 device, facilitates the installation and adjustment of the nozzle 110, and reduces the installation difficulty.

[0061] In some embodiments, the adjustment mechanism 120 includes an adjustment cylinder 122, a piston rod 123, a connecting cylinder 124 and a self-locking nut 125. The adjustment cylinder 122 is a hollow structure with openings at both ends. A partition structure 1221 is provided in the adjustment cylinder 122 to separate the space in the adjustment cylinder 122 into a first chamber 1222 and a second chamber 1223. A connecting hole (marked in the figure) connecting the first chamber 1222 and the second chamber 1223 is provided on the partition structure 1221. The connecting cylinder 124 is slidably arranged in the first chamber 1222. One end of the connecting cylinder 124 is located outside the adjustment cylinder 122, and its end is detachably connected to the end of the large end of the spray needle 140. The other end of the connecting cylinder 124 is connected to the piston rod 123. The end of the piston rod 123 away from the connecting cylinder 124 is slidably arranged in the connecting hole and extends into the second chamber 1223. The self-locking nut 125 is located in the second chamber 1223 and is threadedly connected to the piston rod 123 .

[0062] In this way, by making the piston rod 123 slide in the adjusting cylinder 122, the connecting cylinder 124 and the spray needle 140 can be driven to move in the central axis direction of the nozzle 130, so as to close or open the port at the small end of the nozzle 130. The self-locking nut 125 cooperates with the piston rod 123 to limit the movement limit position of the piston rod 123 in the central axis direction of the nozzle 130, which has the advantages of good stopping effect and convenient installation.

[0063] In some embodiments, the impulse turbine nozzle device 100 further includes a servomotor 202. The servomotor 202 is detachably mounted on the nozzle 110 and / or the nozzle 130. Thus, the servomotor 202 can be mounted only on the nozzle 130 or the nozzle 110, or can be connected to the nozzle 110 and the nozzle 130 respectively.

[0064] In the impulse turbine, the activation and deactivation functions of the deflector 203 require the servomotor 202 to drive the rotating arm 204 to drive the deflector 203 to rotate.

[0065] Compared with traditional impulse turbines (such as Figure 1 Compared with the embodiment in which the servomotor 1 is installed on the casing layer 7, the present application directly installs the servomotor 202 on the nozzle 110 and / or the nozzle 130, which not only enables the servomotor 202 to safely and reliably control the operation of the deflector 203 and facilitates installation, but also makes the structure of the impulse turbine more compact, reduces the volume, and saves costs.

[0066] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An impulse turbine nozzle device, characterized in that: include: Nozzle; an adjusting mechanism installed in the nozzle; The nozzle is a conical hollow structure with openings at both ends; The large end of the nozzle is sealed and connected to one end of the nozzle; A spray needle, the end of the large end of which is detachably connected to the end of one end of the adjustment mechanism; the spray needle is configured to be able to pass through the port of the small end of the nozzle as a whole; The bushing is detachably and sealingly installed in the port of the small end of the nozzle and can be in sealing contact with the surface of the spray needle; the bushing is configured to be detachable from the small end side of the nozzle as a whole.

2. The impulse turbine nozzle device according to claim 1, characterized in that: One of the end of one end of the adjustment mechanism and the end of the large end of the spray needle is provided with a threaded hole, and the other is provided with a threaded column; the threaded column is inserted into the threaded hole and threadably cooperates with the threaded hole to detachably connect the spray needle and the adjustment mechanism.

3. The impulse turbine nozzle device according to claim 2, characterized in that: A fastening locking piece is threadedly connected to the side wall of the adjusting mechanism or the spray needle provided with the threaded hole; one end of the fastening locking piece abuts against the threaded column to lock the spray needle on the adjusting mechanism.

4. The impulse turbine nozzle device according to claim 3, characterized in that: The threaded column includes a smooth section and a threaded section arranged coaxially; the outer diameter of the smooth section is larger than the outer diameter of the threaded section; the threaded hole includes a light hole section and a screw hole section arranged coaxially; the inner diameter of the light hole section is larger than the inner diameter of the threaded hole; The threaded column passes through the light hole section and is threadedly matched with the screw hole section; the smooth section is inserted into the light hole section; a locking screw hole is provided on the side wall of the light hole section; one end of the fastening locking piece is threadedly connected to the locking screw hole, and the other end is abutted against the surface of the smooth section.

5. The impulse turbine nozzle device according to claim 2, characterized in that: An elastic sealing member is sandwiched between an end surface of one end of the adjusting mechanism and an end surface of the large end of the spray needle; the elastic sealing member is arranged along the circumference of the threaded column.

6. The impulse turbine nozzle device according to claim 1, characterized in that: The edge of the inner wall of the small end of the nozzle is provided with a mounting groove along the circumferential direction; the outer wall of the bushing is provided with a mounting portion along the circumferential direction; the mounting portion is sealingly mounted in the mounting groove; The impulse turbine nozzle device further comprises a pressing plate in an annular plate-shaped structure; the pressing plate is detachably connected to the end surface of the small end of the nozzle and abuts against the axial end surface of the mounting portion.

7. The impulse turbine nozzle device according to claim 6, characterized in that: An elastic sealing ring is sandwiched between the outer wall of the mounting portion and the inner wall of the mounting groove; and / or The bushing includes a first section, a second section and a third section which are connected in sequence and coaxially arranged; the mounting portion is located on the outer wall of the second section; the first section passes through the mounting groove and abuts against the inner wall of the small end of the nozzle; the pressure plate is sleeved on the third section and is detachably connected to the end face of the small end of the nozzle to press the mounting portion tightly into the mounting groove.

8. The impulse turbine nozzle device according to claim 1, characterized in that: A flange adjustment gasket is installed at one end of the spray pipe away from the nozzle.

9. The impulse turbine nozzle device according to claim 1, characterized in that: The adjusting mechanism comprises an adjusting cylinder, a piston rod, a connecting cylinder and a self-locking nut; the adjusting cylinder is a hollow structure with openings at both ends; a partition structure is arranged in the adjusting cylinder to separate the space in the adjusting cylinder into a first chamber and a second chamber; a connecting hole connecting the first chamber and the second chamber is arranged on the partition structure; the connecting cylinder is slidably penetrated in the first chamber; one end of the connecting cylinder is located outside the adjusting cylinder, and its end is detachably connected to the end of the large end of the spray needle; the other end of the connecting cylinder is connected to the piston rod; the end of the piston rod away from the connecting cylinder is slidably penetrated in the connecting hole and extends into the second chamber; the self-locking nut is located in the second chamber and is threaded on the piston rod.

10. The impulse turbine nozzle device according to claim 1, characterized in that: It also includes a relay; the relay is detachably mounted on the spray pipe and / or the nozzle.

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