Axial flow fan servo valve retaining device

Abstract

The utility model discloses a retaining device for a servo valve of an axial flow fan. The retaining device comprises a first circular fastener and a second circular fastener, the rear end of the first circular fastener is rotationally connected with the rear end of the second circular fastener; the front end of the first circular fastener is connected with the front end of the second circular fastener in a buckling manner; the inner side circumferential face of the first circular buckle piece and the inner side circumferential face of the second circular buckle piece are both tightly attached to an intermediate shaft of the servo valve, and the left side end of the first circular buckle piece and the left side end of the second circular buckle piece are both tightly attached to the axial face of the servo valve. And the right side end of the first circular buckle piece and the right side end of the second circular buckle piece are tightly attached to the hydraulic cylinder connecting bolt. The retaining device for the servo valve of the axial flow fan, provided by the utility model, can ensure that the bolt is not loosened due to vibration by pressing the connecting bolt of the axial surface of the servo valve and the hydraulic cylinder, so that the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a back-stop device, in particular to a back-stop device for an axial flow fan servo valve. Background Art

[0002] The servo valve of an axial flow fan is a device that controls the opening of the fan blades by controlling the hydraulic cylinder. However, during the long-term operation of the axial flow fan, the fan is often affected by vibration and often suffers from defects: (1) After a period of operation, the bolts connecting the servo valve and the hydraulic cylinder will loosen, causing the center to be misaligned, the vibration to intensify, and the fan vibration to reach a critical value, which requires the fan to be shut down for processing, seriously affecting its economic efficiency; (2) To deal with the loosening of the bolts connecting the servo valve and the hydraulic cylinder and reduce the fan vibration, the fan needs to be re-centered, which seriously affects the maintenance efficiency. Utility Model Content

[0003] In view of this, the utility model proposes a servo valve stop device for an axial flow fan.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A servo valve stop device for an axial flow fan comprises a first circular clip and a second circular clip; the rear end of the first circular clip and the rear end of the second circular clip are rotatably connected; the front end of the first circular clip and the front end of the second circular clip are snap-fitted together; the inner circumferential surface of the first circular clip and the inner circumferential surface of the second circular clip are both stretched and locked on the intermediate shaft of the servo valve, the left side end of the first circular clip and the left side end of the second circular clip are both tightly fitted on the servo valve shaft surface, and the right side end of the first circular clip and the right side end of the second circular clip are both tightly fitted on the hydraulic cylinder connecting bolt.

[0006] Furthermore, the rear end of the first circular clip and the rear end of the second circular clip are rotatably connected via an adapter.

[0007] Further, the adapter comprises a pin shaft, a first pin connection block and a second pin connection block;

[0008] The first pin connection block is rotatably connected to the pin shaft;

[0009] The second pin connection block is rotatably connected to the pin shaft.

[0010] Further, the first circular buckle comprises a first circular buckle and a first supporting curved surface portion;

[0011] The first circular buckle is fixedly connected to the first pin connection block;

[0012] A plurality of through holes are formed on the circumferential surface of the first circular buckle;

[0013] The lower end of the inner circumferential surface of the first circular buckle is fixedly connected to the first supporting curved surface portion.

[0014] Further, the first supporting curved surface portion includes a first supporting curved surface and a first circular shaft support;

[0015] The lower end of the inner circumferential surface of the first circular buckle is fixedly connected to the upper end of the first circular shaft support;

[0016] The lower end of the first circular shaft support is fixedly connected to the upper end of the first supporting curved surface;

[0017] The inner arc surface of the first supporting curved surface is tightly fitted on the intermediate shaft of the servo valve.

[0018] Further, the second circular buckle comprises a second circular buckle and a second supporting curved surface portion;

[0019] The second circular buckle is fixedly connected to the second pin connection block;

[0020] A plurality of through holes are formed on the circumferential surface of the second circular buckle;

[0021] The upper end of the inner circumferential surface of the second circular buckle is fixedly connected to the second supporting curved surface portion.

[0022] Further, the second supporting curved surface portion includes a second supporting curved surface and a second circular shaft support;

[0023] The upper end of the inner circumferential surface of the second circular buckle is fixedly connected to the lower end of the second circular shaft support;

[0024] The upper end of the second circular shaft support and the lower end of the second supporting curved surface are fixedly connected;

[0025] The inner arc surface of the second supporting curved surface is tightly fitted on the intermediate shaft of the servo valve.

[0026] Furthermore, the front end of the first circular buckle and the front end of the second circular buckle are buckled and connected via a buckle.

[0027] Further, the buckle member includes a first buckle block and a second buckle block;

[0028] The front end of the first circular buckle is fixedly connected to the first circular buckle through a connecting block;

[0029] The front end of the second circular buckle is fixedly connected to the second circular buckle through a connecting block;

[0030] The first buckle block and the second buckle block are buckled and connected.

[0031] Furthermore, the longitudinal section of the first buckle block is L-shaped;

[0032] The longitudinal section of the first buckle block is L-shaped;

[0033] A hexagonal hole is transversely formed on the first buckle block; the hexagonal hole of the first buckle block and the hexagonal hole of the second buckle block are connected to each other;

[0034] A hexagonal rod is inserted into two mutually connected inner hexagonal holes.

[0035] Compared with the existing technology, the beneficial effects of the utility model are:

[0036] (1) The axial flow fan servo valve stop device provided by the utility model is highly practical and can ensure that the bolts connecting the servo valve shaft surface and the hydraulic cylinder are not loosened due to vibration by pressing the servo valve shaft surface and the hydraulic cylinder, thereby improving the maintenance efficiency;

[0037] (2) The axial flow fan servo valve stop device provided by the utility model has a simple structure and can be quickly disassembled and assembled;

[0038] (3) The axial flow fan servo valve stop device provided by the utility model is easy to assemble, has fewer parts and components, is composed of only a few parts, and is light and portable. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A three-dimensional diagram of a servo valve stop device for an axial flow fan provided by an embodiment of the utility model;

[0040] Figure 2 for Figure 1 Another angle structural diagram;

[0041] Figure 3 A left side view of the servo valve stop device for an axial flow fan provided by an embodiment of the utility model;

[0042] Figure 4 A schematic diagram of the exploded structure of the axial flow fan servo valve stop device provided in an embodiment of the utility model.

[0043] In the figure: 1. first circular buckle; 2. second circular buckle; 3. first supporting curved surface; 4. second supporting curved surface; 5. first circular shaft support; 6. second circular shaft support; 7. first buckle block; 8. second buckle block; 9. hexagonal hole; 10. hexagonal rod; 11. pin shaft; 12. first pin block; 13. second pin block; 14. through hole. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0045] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Example:

[0048] like Figure 1-4 As shown, a servo valve stop device for an axial flow fan includes a first circular buckle 1, a second circular buckle 2, a first supporting curved surface 3, a first circular shaft support 4, a second supporting curved surface 5 and a second circular shaft support 6.

[0049] The rear end of the first circular buckle 1 and the rear end of the second circular buckle 2 are rotatably connected through an adapter. The adapter includes a pin shaft 11, a first pin connection block 12, and a second pin connection block 13. The first pin connection block 12 is sleeved outside the pin shaft 11 and is rotatably connected to the pin shaft 11; the second pin connection block 13 is sleeved outside the pin shaft 11 and is rotatably connected to the pin shaft 11. Both ends of the pin shaft 11 are provided with limit heads.

[0050] The first circular buckle 1 is fixedly connected to the first pin-connecting block 12. The second circular buckle 2 is fixedly connected to the second pin-connecting block 13.

[0051] The front end of the first circular buckle 1 and the front end of the second circular buckle 2 are buckled and connected by a buckle. The buckle includes a first buckle block 7 and a second buckle block 8. The longitudinal section of the first buckle block 7 is L-shaped; the longitudinal section of the first buckle block 7 is L-shaped. The front end of the first circular buckle 1 is fixedly connected to the first circular buckle 1 through a connecting block; the front end of the second circular buckle 2 is fixedly connected to the second circular buckle 2 through a connecting block.

[0052] The first buckle block 7 is provided with a hexagonal hole 9 transversely; the hexagonal hole 9 of the first buckle block 7 and the hexagonal hole 9 of the second buckle block 8 are connected to each other; a hexagonal rod 10 is inserted into the two connected hexagonal holes 9 of the first buckle block 7 and the second buckle block 8. The simple button opening and closing working principle is adopted to solve the complex fastening buckle problem, which is simple and convenient, easy to install in a narrow space, and improves work efficiency.

[0053] A plurality of through holes are formed on the circumferential surface of the first circular buckle 1. A plurality of through holes are formed on the circumferential surface of the second circular buckle 2.

[0054] The lower end of the inner circumferential surface of the first circular buckle 1 is fixedly connected to the first supporting curved surface 3 .

[0055] The lower end of the inner circumferential surface of the first circular buckle 1 is fixedly connected to the upper end of the first circular shaft support 4 ; the lower end of the first circular shaft support 4 is fixedly connected to the upper end of the first supporting curved surface 3 .

[0056] The upper end of the inner circumferential surface of the second circular buckle 2 is fixedly connected to the second support curved surface 5. The upper end of the inner circumferential surface of the second circular buckle 2 is fixedly connected to the lower end of the second circular shaft support 6;

[0057] The upper end of the second circular shaft support 6 is fixedly connected to the lower end of the second supporting curved surface 5 .

[0058] The inner arc surface of the first supporting curved surface 3 is closely fitted on the intermediate shaft of the servo valve; the inner arc surface of the second supporting curved surface 5 is closely fitted on the intermediate shaft of the servo valve.

[0059] The inner circumferential surface of the first circular buckle 1 and the inner circumferential surface of the second circular buckle 2 are both stretched and locked on the middle shaft of the servo valve, the left end of the first circular buckle 1 and the left end of the second circular buckle 2 are both tightly fitted on the servo valve shaft surface, and the right end of the first circular buckle 1 and the right end of the second circular buckle 2 are both tightly fitted on the hydraulic cylinder connecting bolt.

[0060] Working principle:

[0061] Rotate the first circular buckle 1 and the second circular buckle 2, and adjust the locking degree of the first circular buckle 1 and the second circular buckle 2 through the pin shaft 11 to ensure that the first circular buckle 1 and the second circular buckle 2 can be opened and closed and locked on the intermediate shaft (the central shaft of the servo valve);

[0062] The first buckle block 7, the second buckle block 8 and the hexagonal rod 10 are used to buckle and fix the first circular buckle 1 and the second circular buckle 2;

[0063] The first supporting curved surface 3, the first circular shaft support 4, the second supporting curved surface 5 and the second circular shaft support 6 are used to ensure that the buckle can fit tightly against the intermediate shaft;

[0064] The left end faces of the first circular buckle 1 and the second circular buckle 2 are in close contact with the servo valve shaft surface, and the right end faces of the first circular buckle 1 and the second circular buckle 2 are in close contact with the hydraulic cylinder connecting bolts, so that the connecting bolts are fixed and will not loosen due to vibration.

[0065] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A servo valve stop device for an axial flow fan, characterized in that: It includes a first circular clip and a second circular clip; the rear end of the first circular clip and the rear end of the second circular clip are rotatably connected; the front end of the first circular clip and the front end of the second circular clip are snap-fitted; the inner circumferential surface of the first circular clip and the inner circumferential surface of the second circular clip are both stretched and locked on the intermediate shaft of the servo valve, the left end of the first circular clip and the left end of the second circular clip are both tightly fitted on the servo valve shaft surface, and the right end of the first circular clip and the right end of the second circular clip are both tightly fitted on the hydraulic cylinder connecting bolt.

2. The axial flow fan servo valve stop device according to claim 1, characterized in that: The rear end of the first circular clip and the rear end of the second circular clip are rotatably connected via an adapter.

3. The axial flow fan servo valve stop device according to claim 2, characterized in that: The adapter comprises a pin shaft (11), a first pin connection block (12) and a second pin connection block (13); The first pin connection block (12) is rotatably connected to the pin shaft (11); The second pin connection block (13) is rotatably connected to the pin shaft (11).

4. The servo valve stop device for an axial flow fan according to claim 3, characterized in that: The first circular buckle comprises a first circular buckle (1) and a first supporting curved surface portion; The first circular buckle (1) and the first pin connection block (12) are fixedly connected; A plurality of through holes (14) are formed on the circumferential surface of the first circular buckle (1); The lower end of the inner circumferential surface of the first circular buckle (1) is fixedly connected to the first supporting curved surface portion.

5. The servo valve stop device for an axial flow fan according to claim 4, characterized in that: The first supporting curved surface portion comprises a first supporting curved surface (3) and a first circular shaft support (5); The lower end of the inner circumferential surface of the first circular buckle (1) is fixedly connected to the upper end of the first circular shaft support (5); The lower end of the first circular shaft support (5) and the upper end of the first supporting curved surface (3) are fixedly connected; The inner arc surface of the first supporting curved surface (3) is tightly fitted on the middle shaft of the servo valve.

6. The servo valve stop device for an axial flow fan according to claim 4, characterized in that: The second circular buckle comprises a second circular buckle (2) and a second supporting curved surface portion; The second circular buckle (2) and the second pin connection block (13) are fixedly connected; A plurality of through holes (14) are formed on the circumferential surface of the second circular buckle (2); The upper end of the inner circumferential surface of the second circular buckle (2) is fixedly connected to the second supporting curved surface portion.

7. The servo valve stop device for an axial flow fan according to claim 6, characterized in that: The second supporting curved surface portion comprises a second supporting curved surface (4) and a second circular shaft support (6); The upper end of the inner circumferential surface of the second circular buckle (2) is fixedly connected to the lower end of the second circular shaft support (6); The upper end of the second circular shaft support (6) and the lower end of the second supporting curved surface (4) are fixedly connected; The inner arc surface of the second supporting curved surface (4) is tightly fitted on the middle shaft of the servo valve.

8. The servo valve stop device for an axial flow fan according to claim 1, characterized in that: The front end of the first circular buckle (1) and the front end of the second circular buckle (2) are buckled and connected via a buckle.

9. The servo valve stop device for an axial flow fan according to claim 8, characterized in that: The buckle member comprises a first buckle block (7) and a second buckle block (8); The front end of the first circular buckle (1) is fixedly connected to the first circular buckle (1) via a connecting block; The front end of the second circular buckle (2) is fixedly connected to the second circular buckle (2) via a connecting block; The first buckle block (7) and the second buckle block (8) are buckled and connected.

10. The servo valve stop device for an axial flow fan according to claim 9, characterized in that: The longitudinal section of the first buckle block (7) is L-shaped; The longitudinal section of the first buckle block (7) is L-shaped; The first buckle block (7) is provided with a hexagonal hole (9) in a transverse direction; the hexagonal hole (9) of the first buckle block (7) and the hexagonal hole (9) of the second buckle block (8) are connected to each other; A hexagonal rod (10) is inserted into two mutually connected hexagonal inner holes (9).

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