Special tool for installing exhaust temperature detection device of high-pressure inner cylinder of steam turbine

Abstract

The utility model provides a special tool for installing a steam turbine high-pressure inner cylinder exhaust temperature detection device, which comprises a rod body, an operating handle and a wrench head are respectively arranged at two ends of the rod body, a containing groove is formed in the rod body, an open groove communicated with the containing groove is formed in the wrench head, and a connecting structure for lengthening is arranged on a functional section of the rod body. A matched connection structure is arranged on the wrench head, a through hole is formed in the operation handle, and a limiting ring is arranged at one end of the rod body. The outer diameter of the limiting ring is larger than the diameter of the incircle of the wrench head. The tool is reasonable in structural design, the wrench head is arranged at the tail end of the rod body, the operation handle is arranged at the other end of the rod body, the length of the tool is increased, the tool is of a long and thin structure, therefore, the tool can be applied to narrow space and can also be used for screwing operation of connecting pieces at deep positions, the operation radius of the tool is effectively enlarged, and the application range is wider. And the rod piece inserted into the through hole can be used as a force application point of the screwing tool, so that the screwing is very convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of steam turbine assembly and maintenance, and in particular relates to a special tool for installing a steam turbine high-pressure inner cylinder exhaust temperature detection device. Background Art

[0002] As the main equipment of modern thermal power plants, steam turbines are a kind of rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto the blades, causing the rotor equipped with the blade rows to rotate and perform work externally. The exhaust temperature detection sensor of the high-pressure inner cylinder of the steam turbine (such as an armored thermocouple) is usually locked and fixed on the inner cylinder by a nut. Due to the small installation space and the distance from the external open space, it is difficult for ordinary wrenches to reach the installation position. In addition, in order to reduce the space occupied by the equipment, the structural layout of the steam turbine equipment is relatively compact, and some joints or connection structures are limited by the overall design and have to be placed in a small space. Based on the above application conditions, it is necessary to design a wrench tool that can be used for operation in a small space to solve the problems encountered in actual production. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a special tool for installing a steam turbine high-pressure inner cylinder exhaust temperature detection device.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A special tool for installing a high-pressure inner cylinder exhaust temperature detection device of a steam turbine comprises a hollow rod body, an operating handle is provided at one end of the rod body, a wrench head is provided at the other end, a receiving groove is provided on the rod body along the length direction, a notch is provided on the end of the receiving groove at the wrench head, a functional section is provided on the end of the wrench head, a slot penetrating the receiving groove is provided on the wrench head, a connecting structure for extension is provided at the end of the functional section close to the operating handle, a matching connecting structure is provided on the wrench head, and at the same time, a through hole is provided on the operating handle along the radial direction of the rod body, and a limiting ring is provided on the end of the rod body close to the operating handle; the circumscribed circle diameter of the operating handle is smaller than the inner diameter of the rod, and the outer diameter of the limiting ring is larger than the inscribed circle diameter of the wrench head.

[0006] Furthermore, the operating handle has an external hexagonal structure.

[0007] Furthermore, all corners of the receiving groove are rounded.

[0008] Furthermore, the wrench head is a hexagonal wrench head.

[0009] Furthermore, the extension connection structure includes an external thread structure on the functional section, and the matching connection structure includes an internal thread structure whose inner wall of the wrench head matches the external thread structure, or the matching connection structure includes an internal thread structure whose inner wall of the rod body matches the external thread structure.

[0010] Furthermore, the extension connection structure includes a plug hole radially arranged on the functional section, and the matching connection structure includes a through hole radially arranged on the wrench head along the rod body.

[0011] Furthermore, the limiting ring is located on a side of the functional section close to the accommodating groove.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The invention has a reasonable structural design. By setting a wrench head at the end of the rod body and an operating handle at the other end of the rod body, the length of the tool can be extended. Since the tool is a slender structure, it can be used in narrow spaces and can also be used for screwing connections at deeper locations, effectively expanding the tool's operating radius and having a wider range of applications. In addition, a through hole is provided on the operating handle, and a rod inserted into the through hole can be used as a force application point for the screwing tool, which is very convenient for screwing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0015] Figure 1 A schematic diagram of the structure created by the present invention;

[0016] Figure 2 A schematic diagram of the rod body in the invention;

[0017] Figure 3 This is a schematic diagram of an embodiment of the present invention in which the functional part is provided with a jack;

[0018] Figure 4 This is a schematic diagram of two special tools connected and used in an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the wrench head provided with a second direction operating station in the invention;

[0020] Figure 6 for Figure 5 Schematic diagram of the wrench head part. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0025] A special tool for installing a steam turbine high-pressure inner cylinder exhaust temperature detection device, such as Figures 1 to 6 As shown, it includes a hollow rod body 1, an operating handle 2 is provided at one end of the rod body, a wrench head 3 is provided at the other end, a receiving groove 4 is provided along the length direction of the rod body, a notch 5 is provided at the end of the receiving groove at the wrench head, and a functional section 6 is provided at the end of the wrench head, a slot 7 which passes through the receiving groove is provided on the wrench head, a connecting structure 8 for extension is provided at the end of the functional section close to the operating handle, and a matching connecting structure 9 (matching the connecting structure for extension) is provided on the wrench head. The circumscribed circle diameter of the operating handle is smaller than the inner diameter of the rod body, and the outer diameter of the limiting ring is larger than the inscribed circle diameter of the wrench head. The operating handle can be conveniently inserted into the wrench head of another tool, and the limiting ring can be used to effectively limit the wrench head. The limiting ring is located on the side of the functional section close to the receiving groove. When necessary, as Figure 4 As shown, two special tools can be connected together, that is, by connecting the extension connection structure with the matching connection structure of another tool, the special tool can be effectively extended to adapt to longer distance operations.

[0026] Usually, the operating handle is of an external hexagonal structure. The corners of the receiving groove are rounded. The above-mentioned wrench head adopts an internal hexagonal wrench head. With the help of the operating handle, the tool can be used for screwing operations. Since a through hole 10 is provided on the operating handle along the radial direction of the rod body, a metal rod can be inserted into the through hole as an operating rod, which is very convenient for screwing and operating this special tool. A limiting ring 11 is provided at one end of the rod body close to the operating handle. When this special tool is extended, the limiting ring limits the other connected tool (the end of the wrench head), and stability is guaranteed during use.

[0027] In an optional embodiment, if Figure 1 and Figure 2 As shown, the extension connection structure includes an external thread structure on the functional segment, and the matching connection structure includes an internal thread structure whose inner wall of the wrench head matches the external thread structure, or the matching connection structure includes an internal thread structure whose inner wall of the rod body (close to one end of the wrench head) matches the external thread structure.

[0028] In this embodiment, the diameter of the inscribed circle of the wrench head is larger than the diameter of the internal thread structure, that is, the external thread structures of the working section and the functional section of the wrench head do not interfere with each other, and only the internal thread structure of the inner wall of the connecting section of the wrench head is threadedly connected with the external thread structure of the functional section.

[0029] In another optional embodiment, Figure 3 As shown, the connecting structure for extension includes a plug hole 12 arranged radially on the functional section, and the matching connecting structure includes a through hole 13 arranged radially on the rod body on the wrench head. When extension is required, the operating handle of one tool is inserted into the wrench head of another tool, and the through hole is made to correspond to the plug hole, and then a connecting piece (such as a stop pin) is inserted into the through hole to effectively connect the two special tools.

[0030] In a further improved scheme, Figure 5 and Figure 6 As shown, the wrench head includes a working section 14 and a connecting section 15, the connecting section is connected to the rod body, and a second direction operating station 16 is provided on the connecting section. The second direction operating station includes a V-shaped groove on the two side walls of the groove. The screw / nut perpendicular to the wrench head (rod body) can be screwed with the help of the second direction operating station, so that the special tool can be used in two different directions.

[0031] The invention has a reasonable structural design. By setting a wrench head at the end of the rod body and an operating handle at the other end of the rod body, the length of the tool can be extended. Since the tool is a slender structure, it can be used in a narrow space and can also be used for screwing operations of connectors in deeper positions. The two tools can also be connected together when necessary, which further expands the operating radius of the tool and has a wider range of applications. In addition, a through hole is provided on the operating handle, and the rod inserted into the through hole can be used as the force application point of the screwing tool, which is very convenient for screwing.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A special tool for installing a steam turbine high-pressure inner cylinder exhaust temperature detection device, characterized in that: It comprises a hollow rod body, an operating handle is arranged at one end of the rod body, a wrench head is arranged at the other end, a receiving groove is opened along the length direction of the rod body, a notch is arranged at the end of the receiving groove at the wrench head, a functional section is arranged at the end of the wrench head, a slot which passes through the receiving groove is arranged on the wrench head, a connecting structure for extension is arranged at the end of the functional section close to the operating handle, a matching connecting structure is arranged on the wrench head, and at the same time, a through hole is arranged on the operating handle along the radial direction of the rod body, and a limiting ring is arranged at the end of the rod body close to the operating handle; the circumscribed circle diameter of the operating handle is smaller than the inner diameter of the rod, and the outer diameter of the limiting ring is larger than the inscribed circle diameter of the wrench head.

2. A special tool for installing a steam turbine high-pressure inner cylinder exhaust gas temperature detection device according to claim 1, characterized in that: The operating handle is in an external hexagonal structure.

3. A special tool for installing a steam turbine high-pressure inner cylinder exhaust gas temperature detection device according to claim 1, characterized in that: All corners of the receiving groove are rounded.

4. A special tool for installing a steam turbine high-pressure inner cylinder exhaust gas temperature detection device according to claim 1, characterized in that: The wrench head adopts a hexagonal wrench head.

5. A special tool for installing a steam turbine high-pressure inner cylinder exhaust gas temperature detection device according to claim 1, characterized in that: The connecting structure for extension includes an external thread structure on the functional section, and the matching connecting structure includes an internal thread structure on the inner wall of the wrench head or the inner wall of the rod body.

6. A special tool for installing a steam turbine high-pressure inner cylinder exhaust gas temperature detection device according to claim 1, characterized in that: The extension connection structure comprises a plug hole arranged radially on the functional section, and the matching connection structure comprises a through hole arranged radially on the wrench head along the rod body.

7. A special tool for installing a steam turbine high-pressure inner cylinder exhaust gas temperature detection device according to claim 1, characterized in that: The limiting ring is located at a side of the functional section close to the accommodating groove.

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