Combined assembly type operation oil pipe structure and Kaplan turbine

Abstract

The utility model relates to a combined assembly type operation oil pipe structure and a Kaplan turbine. The combined assembly type operation oil pipe structure comprises a guide block, an assembly joint, a first operation oil pipe, a second operation oil pipe and a feedback rod, small-caliber assembly type pipes are adopted as the first operation oil pipe and the second operation oil pipe, and at least two first oil pipe sections are combined and assembled into the whole first operation oil pipe in a multi-section combination mode. At least two second oil pipe sections are combined and assembled into a whole second operation oil pipe, the feedback rod also adopts a multi-section combined assembly mode and is formed by assembling a plurality of feedback sections, and the whole feedback rod is assembled into a structure with supporting and guiding functions, so that the first operation oil pipe, the second operation oil pipe and the feedback rod are convenient to mount and adjust; the manufacturing and machining difficulty and the machining cost are reduced, and the rigidity of the first operation oil pipe, the second operation oil pipe and the feedback rod is improved. Oil does not pass through the interior of the feedback rod any more, the structure is simpler, and the manufacturing and machining difficulty is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbines, in particular to a combined assembled operating oil pipe structure and a propeller type water turbine. Background Art

[0002] The existing propeller turbine oil pipe sections have different structures. The traditional oil pipe section has a complex structure. It generally adopts a nested structure of inner pipe, middle pipe and outer pipe. The outer pipe is fixed on the rotating main shaft, and the front end is connected to the oil receiver; one end of the middle pipe is fixed on the piston rod of the runner, and the other end is connected to the oil receiver. Together with the outer pipe and the inner pipe, it separates the inlet and outlet oil chambers of the two hydraulic oils; the inner pipe is fixed on the cylinder cover of the blade servo, and moves linearly (back and forth reciprocatingly) synchronously with the servo cylinder, and transmits a displacement signal. The inner hole of the inner pipe is connected to the balance oil in the inner cavity of the runner body. After the oil pipe section passes through the hollow long main shaft, one end is connected to the turbine runner blade servo, and the other end is connected to the generator bubble head end oil receiver. Therefore, the oil pipe section is long and small in diameter. It belongs to the slender shaft type, with poor rigidity and great processing difficulty. The installation method of the oil pipe section is special. Due to the size limitation of the hollow main shaft, its connection method mostly adopts threaded connection, which has poor sealing performance, high concentricity requirements, and great installation difficulty. Utility Model Content

[0003] Based on this, it is necessary to provide a combined assembled operating oil pipe structure and a propeller-type water turbine with good overall rigidity, less processing difficulty, and less installation difficulty.

[0004] A combined assembled operating oil pipe structure is inserted into the main shaft of a propeller turbine, and the combined assembled oil pipe structure comprises:

[0005] The guide block installed in the main shaft is formed with a first oil pipe connecting hole, a second oil pipe connecting hole and a first guide hole; the center axis direction of the first guide hole is consistent with the longitudinal direction of the main shaft;

[0006] An assembly joint installed in the runner body of the propeller turbine is formed with a second guide hole coaxially arranged with the first guide hole, a first oil channel and a second oil channel;

[0007] The first operating oil pipe comprises at least two first oil pipe sections; both ends of the first oil pipe communication hole are respectively detachably connected to one end of the two first oil pipe sections; one end of the first oil pipe section closest to the assembly joint among the at least two first oil pipe sections is detachably connected to the assembly joint and is connected to the first oil channel;

[0008] The second operating oil pipe comprises at least two second oil pipe sections; both ends of the second oil pipe communication hole are respectively detachably connected to one end of the two second oil pipe sections; one end of the second oil pipe section closest to the assembly joint among the at least two second oil pipe sections is detachably connected to the assembly joint and is connected to the second oil channel;

[0009] The feedback rod comprises a plurality of coaxial feedback sections which are detachably connected in sequence; one of the feedback sections is slidably arranged in the first guide hole; one of the plurality of feedback sections is slidably arranged in the second guide hole and is in sealing contact with the hole wall of the second guide hole.

[0010] A propeller-type water turbine, characterized in that it comprises a propeller-type runner structure, a main shaft, an oil receiver and the combined assembled operating oil pipe structure as described above;

[0011] The paddle wheel structure comprises a water discharge cone, a wheel body, wheel blades and a wheel servomotor; the two ends of the wheel body are respectively connected to the large end of the water discharge cone and one end of the main shaft; the wheel blades are rotatably mounted on the wheel body;

[0012] The runner servomotor comprises a hollow piston shaft, a servomotor piston sleeved and fixed on the piston shaft, and a servomotor oil cylinder slidably sleeved on the piston shaft; the servomotor piston is in sealing contact with the inner wall of the servomotor oil cylinder to divide the space in the servomotor oil cylinder into a first oil chamber and a second oil chamber; one end of the piston shaft located outside the servomotor oil cylinder is connected to the runner body and is coaxially arranged with the second guide hole; the servomotor oil cylinder is linked with the runner blades and can be operably moved back and forth along the longitudinal direction of the piston shaft to drive the runner blades to rotate;

[0013] The guide block is inserted into the main shaft; the assembly joint is inserted into and fixed in the piston shaft, and the first oil channel and the second oil channel are connected to the first oil chamber and the second oil chamber respectively; the feedback section extends out of the assembly joint and is connected to the servomotor cylinder;

[0014] The oil receiver is respectively connected to one end of the first operating oil pipe and the second operating oil pipe away from the assembly joint; one end of the feedback rod away from the assembly joint is slidably arranged in the oil receiver.

[0015] The above-mentioned combined assembly type operating oil pipe structure and the propeller type water turbine use small-diameter, assembled pipes as the first operating oil pipe and the second operating oil pipe, and through a multi-section combination method, at least two first oil pipe sections are combined and assembled into a whole first operating oil pipe, and at least two second oil pipe sections are combined and assembled into a whole second operating oil pipe. Within the fixed length range between the oil receiver and the runner relay, the above-mentioned first operating oil pipe, the second operating oil pipe and the guide block are used to assemble the whole into a structure with both support and guiding functions, which is convenient for the installation and adjustment of the first operating oil pipe and the second operating oil pipe, reduces the manufacturing and processing difficulty and processing cost, and improves the rigidity of the first operating oil pipe and the second operating oil pipe. Moreover, the feedback rod also adopts a multi-section combination assembly method, which is assembled from multiple feedback sections, and the guide block has a supporting and guiding effect on the feedback rod, which improves the rigidity of the feedback rod and reduces the processing difficulty of the feedback rod. Furthermore, the feedback rod is no longer oiled, and its structure is simpler and the manufacturing and processing difficulty is lower. Therefore, compared with the traditional operating oil pipe structure composed of an outer tube, a middle tube and an inner tube, the above-mentioned combined assembled operating oil pipe structure has a simpler structure, lower processing difficulty, better rigidity and lower processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a propeller-type water turbine in one embodiment of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the combined assembled operating oil pipe structure in the propeller-type water turbine shown;

[0018] Figure 3 for Figure 2 A cross-sectional view of a guide block in the combined assembled operating oil pipe structure shown;

[0019] Figure 4 for Figure 2 A cross-sectional view of the combined assembled operating oil pipe structure at the assembly joint;

[0020] Figure 5 for Figure 2 A cross-sectional view of the combined assembled operating oil pipe structure at the guide block;

[0021] Figure 6 for Figure 2 A side view of the combined assembled operating oil pipe structure shown;

[0022] Figure 7 for Figure 2 A cross-sectional view of a seal mounting seat in the combined assembled operating oil pipe structure shown;

[0023] Figure 8 for Figure 2A cross-sectional view of the rotary sleeve in the combined assembled operating oil pipe structure is shown.

[0024] Explanation of reference numerals: 10, propeller turbine; 100, propeller runner structure; 110, drain cone; 120, runner body; 130, runner blade; 140, runner servomotor; 141, piston shaft; 142, servomotor piston; 143, servomotor oil cylinder; 144, first oil chamber; 145, second oil chamber; 200, main shaft; 300, oil receiver; 400, combined assembled operating oil pipe structure; 410, guide block; 411, first oil pipe connecting hole; 412, second oil pipe connecting hole; 413, first guide hole; 420, assembly joint ; 421, second guide hole; 422, first oil channel; 423, second oil channel; 424, annular mounting groove; 430, first operating oil pipe; 431, first oil pipe section; 440, second operating oil pipe; 441, second oil pipe section; 450, feedback rod; 451, feedback section; 452, rotary sleeve; 460, wear-resistant guide sleeve; 470, elastic seal; 480, sealing assembly; 481, elastic sealing ring; 482, O-ring; 490, sealing mounting seat; 491, first sealing groove; 492, second sealing groove. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] See also Figure 1 The utility model provides a combined assembled operating oil pipe structure 400 and a propeller-type water turbine 10. The propeller-type water turbine 10 includes a propeller-type runner structure 100, a main shaft 200, an oil receiver 300 and a combined assembled operating oil pipe structure 400.

[0031] The paddle wheel structure 100 includes a water discharge cone 110, a wheel body 120, a wheel blade 130 and a wheel servomotor 140. The main shaft 200 is a hollow structure with openings on both sides. The two ends of the wheel body 120 are respectively connected to the large end of the water discharge cone 110 and one end of the main shaft 200. The wheel blade 130 is rotatably mounted on the wheel body 120.

[0032] The runner servomotor 140 includes a hollow piston shaft 141, a servomotor piston 142 sleeved and fixed on the piston shaft 141, and a servomotor oil cylinder 143 slidably sleeved on the piston shaft 141. The servomotor piston 142 is in sealing contact with the inner wall of the servomotor oil cylinder 143 to separate the space in the servomotor oil cylinder 143 into a first oil chamber 144 and a second oil chamber 145. One end of the piston shaft 141 located outside the servomotor oil cylinder 143 is connected to the runner body 120. The servomotor oil cylinder 143 is linked with the runner blades 130 and can be operably moved back and forth along the longitudinal direction of the piston shaft 141 to drive the runner blades 130 to rotate.

[0033] The combined assembled operating oil pipe structure 400 is passed through the main shaft 200. One end of the combined assembled operating oil pipe structure 400 is connected to the runner servomotor 140, and the other end is connected to the oil receiver 300, and is used to supply high-pressure oil to the runner servomotor 140 to drive the runner servomotor 140 to operate, thereby driving the runner blades 130 to rotate, and realizing the adjustment of the angle of the runner blades 130.

[0034] Please also read Figure 2 The combined assembled operating oil pipe structure 400 in the preferred embodiment of the utility model includes a guide block 410, an assembly joint 420, a first operating oil pipe 430, a second operating oil pipe 440 and a feedback rod 450.

[0035] Please also read Figure 3 The guide block 410 is used to be installed in the main shaft 200, and is formed with a first oil pipe connecting hole 411, a second oil pipe connecting hole 412 and a first guide hole 413. In the propeller turbine 10, the guide block 410 is installed in the main shaft 200, and the central axis direction of the first guide hole 413 is consistent with the longitudinal direction of the main shaft 200.

[0036] Please also read Figure 4 The assembly joint 420 is formed with a second guide hole 421 coaxially arranged with the first guide hole 413 , a first oil passage 422 and a second oil passage 423 . In the propeller turbine 10 , the assembly joint 420 is installed in the runner body 120 .

[0037] Please also read Figure 5 The first operating oil pipe 430 includes at least two first oil pipe sections 431. Both ends of the first oil pipe communication hole 411 are detachably connected to one end of the two first oil pipe sections 431. One end of the first oil pipe section 431 closest to the assembly joint 420 among the at least two first oil pipe sections 431 is detachably connected to the assembly joint 420 and is connected to the first oil channel 422. That is, at least two first oil pipe sections 431 are connected in sequence through the guide block 410 to form a whole first operating oil pipe 430.

[0038] The second operating oil pipe 440 includes at least two second oil pipe sections 441. Both ends of the second oil pipe communication hole 412 are detachably connected to one end of the two second oil pipe sections 441. One end of the second oil pipe section 441 closest to the assembly joint 420 among the at least two second oil pipe sections 441 is detachably connected to the assembly joint 420 and is connected to the second oil channel 423. That is, the at least two second oil pipe sections 441 are sequentially connected through the guide block 410 to form a whole second operating oil pipe 440.

[0039] The feedback rod 450 includes a plurality of coaxial and sequentially detachably connected feedback segments 451. One of the feedback segments 451 is slidably disposed in the first guide hole 413. One of the plurality of feedback segments 451 is slidably disposed in the second guide hole 421 and is in sealing contact with the hole wall of the second guide hole 421.

[0040] In the propeller turbine 10, the first operating oil pipe 430, the second operating oil pipe 440, and the feedback rod 450 are penetrated through the main shaft 200, and the oil receiver 300 is respectively connected to the first operating oil pipe 430 and the second operating oil pipe 440 at one end away from the assembly joint 420, and the feedback rod 450 is slidably penetrated through the oil receiver 300 at one end away from the assembly joint 420, and the first oil channel 422 and the second oil channel 423 are respectively connected to the first oil chamber 144 and the second oil chamber 145, and the feedback rod 450 at one end away from the oil receiver 300 extends out of the assembly joint 420 and is connected to the relay cylinder 143. Therefore, during the use of the propeller turbine 10, when one of the first operating oil pipe 430 and the second operating oil pipe 440 serves as the oil inlet pipe of the runner servomotor 140, the other serves as the oil return pipe of the runner servomotor 140, so as to drive the servomotor cylinder 143 to reciprocate on the piston shaft 141 under the drive of the high-pressure oil provided by the oil receiver 300, thereby driving the runner blades 130 to rotate.

[0041] The above-mentioned combined assembled operating oil pipe structure 400 adopts small-diameter, assembled pipes as the first operating oil pipe 430 and the second operating oil pipe 440, and through a multi-section combination method, at least two first oil pipe sections 431 are combined and assembled into a whole first operating oil pipe 430, and at least two second oil pipe sections 441 are combined and assembled into a whole second operating oil pipe 440. Within the fixed length range between the oil receiver 300 and the rotary relay 140, the above-mentioned first operating oil pipe 430, the second operating oil pipe 440 and the guide block 410 are used to be assembled as a whole into a structure with both supporting and guiding functions, which is convenient for the installation and adjustment of the first operating oil pipe 430 and the second operating oil pipe 440, reduces the manufacturing and processing difficulty and processing cost, and improves the rigidity of the first operating oil pipe 430 and the second operating oil pipe 440.

[0042] Moreover, the feedback rod 450 is also assembled in a multi-section manner, and is assembled from a plurality of feedback sections 451, and the guide block 410 supports and guides the feedback rod 450, thereby increasing the rigidity of the feedback rod 450 and reducing the difficulty of processing the feedback rod 450. Furthermore, since oil is no longer passed through the inside of the feedback rod 450, its structure is simpler and the manufacturing and processing difficulty is lower. Therefore, compared with the traditional operating oil pipe structure composed of an outer tube, a middle tube and an inner tube, the above-mentioned combined assembly type operating oil pipe structure 400 has a simpler structure, lower processing difficulty, better rigidity and lower processing cost.

[0043] Please refer again Figure 2In some embodiments, there are multiple guide blocks 410. The multiple guide blocks 410 are spaced apart along the longitudinal direction of the feedback section 451. A first oil pipe section 431 and a second oil pipe section 441 are provided between two adjacent guide blocks 410. In this way, the number of the first oil pipe sections 431 and the number of the second oil pipe sections 441 are both the number of the guide blocks 410 plus 1. Therefore, when the oil receiver 300 and the rotor body 120 are specifically fixed, the first operating oil pipe 430 and the second operating oil pipe 440 are divided into three sections or more, so that each section of the first oil pipe section 431 and each section of the oil pipe section are shorter, which is beneficial to further improve the rigidity of the first operating oil pipe 430 and the second operating oil pipe 440, and is also more convenient.

[0044] Furthermore, in some embodiments, the distance between two adjacent guide blocks 410 is ≤ 2 meters. Thus, the lengths of the first oil pipe section 431 and the second oil pipe section 441 are both ≤ 2 meters, so as to ensure that the first operating oil pipe 430 and the second operating oil pipe 440 have better rigidity and are less difficult to manufacture.

[0045] Please also read Figure 6 In some embodiments, there are multiple first operating oil pipes 430 and multiple second operating oil pipes 440. The guide block 410 is formed with multiple first oil pipe communication holes 411 corresponding to the multiple first operating oil pipes 430 and multiple second oil pipe communication holes 412 corresponding to the multiple second operating oil pipes 440. Both ends of each first oil pipe communication hole 411 are detachably connected to one end of the corresponding two first oil pipe sections 431. Both ends of each second oil pipe communication hole 412 are detachably connected to one end of the corresponding two second oil pipe sections 441.

[0046] Specifically, the plurality of first oil pipe communication holes 411 and the plurality of second oil pipe communication holes 412 are arranged at intervals along the circumference of the guide block 410 , and the first guide hole 413 is located in the middle of the guide block 410 .

[0047] In this way, during each angle adjustment process of the runner blades 130, multiple first operating oil pipes 430 and multiple second operating oil pipes 440 constitute multiple oil inlet pipes and multiple oil return pipes of the runner relay 140. Therefore, the first oil pipe section 431 and the second oil pipe section 441 can both use pipes with smaller diameters and are assembled into a whole using the guide block 410. With the joint support of the multiple first operating oil pipes 430 and the multiple second operating oil pipes 440, a compact structural design is achieved, and the overall rigidity of the combined assembled operating oil pipe structure 400 is improved, while further reducing the processing cost.

[0048] Please refer again Figure 5In some embodiments, a wear-resistant guide sleeve 460 is inserted and fixed in the first guide hole 413, and the feedback section 451 is slidably inserted in the wear-resistant guide sleeve 460. In this way, a wear-resistant guide sleeve 460 is provided between the feedback section 451 and the inner wall of the first guide hole 413 to prevent the feedback section 451 from directly contacting the guide block 410, reduce the probability of wear of the guide block 410 and the feedback section 451, and extend the service life of the guide block 410 and the feedback rod 450. At the same time, the wear-resistant guide sleeve 460 can also absorb part or all of the impact force on the feedback rod 450, so as to reduce the probability of shaking of the feedback rod 450 and improve the operation accuracy of the propeller turbine 10.

[0049] Please refer again Figure 4 In some embodiments, an elastic seal 470 and a sealing assembly 480 are disposed between the feedback section 451 and the hole wall of the second guide hole 421. The elastic seal 470 and the sealing assembly 480 are disposed at intervals along the longitudinal direction of the feedback section 451, and are both annular structures disposed along the circumference of the feedback section 451. The sealing assembly 480 includes an elastic sealing ring 481 and an O-ring 482 sleeved on the elastic sealing ring 481.

[0050] In this way, two seals are formed between the feedback rod 450 and the hole wall of the second guide hole 421 to improve the sealing effect between the feedback rod 450 and the assembly joint 420, and reduce the probability of the oil in the runner body 120 penetrating into the main shaft 200. Further, the sealing assembly 480 is configured as an elastic sealing ring 481 and an O-shaped sealing ring 482 sleeved on the elastic sealing ring 481, so as to ensure that if the elastic sealing ring 481 is worn during use, the reversible elasticity of the O-shaped sealing ring itself can be used to press the elastic sealing ring 481 against the surface of the feedback section 451, so as to improve the sealing reliability.

[0051] Please refer again Figure 4 and Figure 7 Furthermore, in some embodiments, an annular mounting groove 424 is formed along the circumference of the second guide hole 421 at an inner wall edge of one end of the second guide hole 421 away from the guide block 410 .

[0052] The combined assembly type operating oil pipe structure 400 also includes a sealing mounting seat 490 arranged along the circumference of the feedback section 451. The sealing mounting seat 490 is inserted into the annular mounting groove 424 and fixedly connected to the assembly joint 420. The inner wall of the sealing mounting seat 490 is formed with a first sealing groove 491 and a second sealing groove 492 arranged along the circumference. The elastic sealing member 470 is clamped between the inner wall of the first sealing groove 491 and the feedback section 451. The elastic sealing ring 481 and the O-ring 482 are clamped between the second sealing groove 492 and the feedback section 451.

[0053] The provision of the sealing mounting seat 490 not only reduces the difficulty of installing the elastic seal 470 and the sealing assembly 480, prevents the elastic seal 470 and the sealing assembly 480 from slipping along the axial direction of the feedback rod 450 relative to the assembly joint 420, but also further improves the sealing effect and sealing reliability between the feedback rod 450 and the assembly joint 420.

[0054] Please also read Figure 8 In some embodiments, both ends of the feedback section 451 are formed with external threads. Any two feedback sections 451 are threadedly connected via a rotary sleeve 452. The structure of the rotary sleeve 452 may form coaxially arranged threaded holes at both ends, or may form a through hole on the rotary sleeve 452, and form internal threads on the inner walls at both ends of the through hole to facilitate the threaded connection between the feedback section 451 and the rotary sleeve 452. In this way, the threaded connection between the two feedback sections 451 is achieved through the rotary sleeve 452, which makes the installation and adjustment of the feedback rod 450 convenient, and at the same time makes the structure of the feedback rod 450 simpler.

[0055] Of course, in other embodiments, the feedback segments 451 may also be detachably connected by other means, such as by using a snap-fit ​​structure, or by directly forming mutually matching structures at both ends of the feedback segment 451 for detachable connection, such as internal threads and external threads.

[0056] Please refer again Figure 4 and Figure 7 In some embodiments, both ends of the first oil pipe connecting hole 411 are formed with internal threads. One end of each first oil pipe section 431 is sealed and threadedly connected to one end of the corresponding first oil pipe connecting hole 411 through a first pipe joint (not shown). Both ends of the second oil pipe connecting hole 412 are formed with internal threads. One end of each second oil pipe section 441 is sealed and threadedly connected to one end of the corresponding oil pipe connecting hole through a second pipe joint (not shown).

[0057] In this way, both ends of the first oil pipe section 431 are provided with a first pipe joint, and both ends of the second oil pipe section 441 are provided with a second pipe joint, so the guide block 410 is threadedly connected to the first oil pipe section 431 and the second oil pipe section 441 respectively, making the combined assembly of the first oil pipe and the second oil pipe easier.

[0058] Of course, in other embodiments, the guide block 410 may be detachably connected to the first oil pipe section 431 and the second oil pipe section 441 respectively by means of flange connection or the like.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0060] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it 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. A combined assembled operating oil pipe structure, which is inserted into the main shaft of a propeller turbine, characterized in that: The combined assembled oil pipe structure comprises: The guide block installed in the main shaft is formed with a first oil pipe connecting hole, a second oil pipe connecting hole and a first guide hole; the center axis direction of the first guide hole is consistent with the longitudinal direction of the main shaft; An assembly joint installed in the runner body of the propeller turbine is formed with a second guide hole coaxially arranged with the first guide hole, a first oil channel and a second oil channel; The first operating oil pipe comprises at least two first oil pipe sections; both ends of the first oil pipe communication hole are respectively detachably connected to one end of the two first oil pipe sections; one end of the first oil pipe section closest to the assembly joint among the at least two first oil pipe sections is detachably connected to the assembly joint and is connected to the first oil channel; The second operating oil pipe comprises at least two second oil pipe sections; both ends of the second oil pipe communication hole are respectively detachably connected to one end of the two second oil pipe sections; one end of the second oil pipe section closest to the assembly joint among the at least two second oil pipe sections is detachably connected to the assembly joint and is connected to the second oil channel; The feedback rod comprises a plurality of coaxial feedback sections which are detachably connected in sequence; one of the feedback sections is slidably arranged in the first guide hole; one of the plurality of feedback sections is slidably arranged in the second guide hole and is in sealing contact with the hole wall of the second guide hole.

2. The combined assembled operating oil pipe structure according to claim 1 is characterized in that: There are a plurality of guide blocks; the plurality of guide blocks are arranged at intervals along the longitudinal direction of the feedback section; and one first oil pipe section and one second oil pipe section are provided between each of two adjacent guide blocks.

3. The combined assembled operating oil pipe structure according to claim 2 is characterized in that: The distance between two adjacent guide blocks is ≤ 2 meters.

4. The combined assembled operating oil pipe structure according to claim 1 is characterized in that: There are multiple first operating oil pipes and multiple second operating oil pipes; the guide block is formed with multiple first oil pipe connecting holes corresponding to the multiple first operating oil pipes and multiple second oil pipe connecting holes corresponding to the multiple second operating oil pipes; the two ends of each first oil pipe connecting hole are respectively detachably connected to one end of the corresponding two first oil pipe sections; the two ends of each second oil pipe connecting hole are respectively detachably connected to one end of the corresponding two second oil pipe sections.

5. The combined assembled operating oil pipe structure according to claim 1 is characterized in that: A wear-resistant guide sleeve is inserted into and fixed in the first guide hole; and the feedback section is slidably inserted into the wear-resistant guide sleeve.

6. The combined assembled operating oil pipe structure according to claim 1 is characterized in that: An elastic seal and a sealing assembly are arranged between the feedback section and the wall of the second guide hole; the elastic seal and the sealing assembly are arranged at intervals along the longitudinal direction of the feedback section, and both are annular structures arranged along the circumference of the feedback section; the sealing assembly includes an elastic sealing ring and an O-ring sleeved on the elastic sealing ring.

7. The combined assembled operating oil pipe structure according to claim 6 is characterized in that: An annular mounting groove is formed on the inner wall edge of the second guide hole away from one end of the guide block along the circumference of the second guide hole; The combined assembled operating oil pipe structure also includes a sealing mounting seat arranged along the circumference of the feedback section; the sealing mounting seat is inserted into the annular mounting groove and fixedly connected to the assembly joint; the inner wall of the sealing mounting seat is formed with a first sealing groove and a second sealing groove arranged along the circumference; the elastic sealing member is clamped between the inner wall of the first sealing groove and the feedback section; the elastic sealing ring and the O-ring are clamped between the second sealing groove and the feedback section.

8. The combined assembled operating oil pipe structure according to claim 1 is characterized in that: External threads are formed at both ends of the feedback section; any two feedback sections are connected via a screw sleeve thread.

9. The combined assembled operating oil pipe structure according to claim 1, characterized in that: Both ends of the first oil pipe communication hole are formed with internal threads; one end of each of the first oil pipe sections is sealed and threadedly connected to one end of the corresponding first oil pipe communication hole through a first pipe joint; Both ends of the second oil pipe communication hole are formed with internal threads; one end of each of the second oil pipe sections is sealed and threadedly connected to one end of the corresponding oil pipe communication hole through a second pipe joint.

10. A propeller-type water turbine, characterized in that: It comprises a paddle wheel structure, a main shaft, an oil receiver and a combined assembled operating oil pipe structure as claimed in any one of claims 1 to 9; The paddle wheel structure comprises a water discharge cone, a wheel body, wheel blades and a wheel servomotor; the two ends of the wheel body are respectively connected to the large end of the water discharge cone and one end of the main shaft; the wheel blades are rotatably mounted on the wheel body; The runner servomotor comprises a hollow piston shaft, a servomotor piston sleeved and fixed on the piston shaft, and a servomotor oil cylinder slidably sleeved on the piston shaft; the servomotor piston is in sealing contact with the inner wall of the servomotor oil cylinder to divide the space in the servomotor oil cylinder into a first oil chamber and a second oil chamber; one end of the piston shaft located outside the servomotor oil cylinder is connected to the runner body and is coaxially arranged with the second guide hole; the servomotor oil cylinder is linked with the runner blades and can be operably moved back and forth along the longitudinal direction of the piston shaft to drive the runner blades to rotate; The guide block is inserted into the main shaft; the assembly joint is inserted into and fixed in the piston shaft, and the first oil channel and the second oil channel are connected to the first oil chamber and the second oil chamber respectively; the feedback section extends out of the assembly joint and is connected to the servomotor cylinder; The oil receiver is respectively connected to one end of the first operating oil pipe and the second operating oil pipe away from the assembly joint; one end of the feedback rod away from the assembly joint is slidably arranged in the oil receiver.

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