Hoop with three-way expansion indicator

Abstract

The utility model provides a clamp with a three-way expansion indicator, which comprises a left clamp ring and a right clamp ring, one end of the left clamp ring is rotatably connected with one end of the right clamp ring through a second pin shaft, and the other end of the left clamp ring and the other end of the right clamp ring are fastened through a fisheye slipknot long screw and a fishtail nut; the end, away from the left clamping ring and the right clamping ring, of the fisheye slipknot long screw is connected with a first pointer nut, and the fisheye slipknot long screw is connected with a second pointer nut through a cross clamp, wherein the second pointer nut and the first pointer nut are arranged in a cross shape. The first pointer nut and the second pointer nut are connected through the fisheye slipknot long screw and the cross clamp, a three-direction indication is formed in the first dimension direction and the second dimension direction, the thermal expansion displacement of a measured object can be measured in the third dimension direction, the first pointer nut and the second pointer nut have enough rigidity and tip ends, and therefore the thermal expansion displacement of the measured object can be measured. Data can be accurately read, the structure is compact, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the field of expansion displacement measuring devices for thermal power equipment in power plants, and particularly relates to a clamp with a three-way expansion indicator. Background Art

[0002] The installation and detection requirements of expansion indicators for power plant boilers are high, and a structure that is easy to install and read is needed.

[0003] When installing traditional three-way expansion indicators for boilers, the structure of the indicator is composed of multiple loose parts such as the upper part, lower part, pointer, sleeve, bolts, etc. Moreover, the pointer and the clamp are connected by welding. Such a structure is relatively cumbersome during the installation process and is also limited by the installation space. In particular, on-site welding of the pointer is required, and it is easy for parts to fall off and for safety problems of high-altitude operators during the installation and welding processes.

[0004] Therefore, a detachable clamp with a three-way pointer expansion indicator is designed. All parts on the clamp are connected together, including the indicator pointer. It can not only complete the installation and disassembly of the boiler expansion indicator without relying on any tools, but also quickly and safely complete the disassembly and assembly of the expansion indicator without using cutting and welding tools, saving costs and reducing the burden on installation and detection personnel. Content of the Utility Model

[0005] A clamp with a three-way expansion indicator of the utility model is used to solve the related technical problems in the background art.

[0006] The technical solution provided by the utility model is as follows: A clamp with a three-way expansion indicator includes a left clamp ring and a right clamp ring. One end of the left clamp ring and the right clamp ring is rotationally connected through a second pin shaft, and the other end of the left clamp ring and the right clamp ring is fastened through a fish-eye flexible long screw and a fish-tail nut.

[0007] A first pointer nut is connected to the end of the fish-eye flexible long screw far from the left clamp ring and the right clamp ring, and a second pointer nut arranged in a cross shape with the first pointer nut is connected to the fish-eye flexible long screw through a cross clamp.

[0008] Further, one end of the fish-eye flexible long screw is axially connected to the left clamp ring through a first pin shaft. The fish-eye flexible long screw is clamped on the right clamp ring, and the fish-tail nut is screwed on the fish-eye flexible long screw to lock the left clamp ring and the right clamp ring through the fish-tail nut.

[0009] Further, the inner ring sides of the left clamp ring and the right clamp ring both have a toothed structure.

[0010] Further, the cross clamp is sleeved on the fish-eye flexible long screw and fastened through a first clamping bolt.

[0011] Further, a long cylinder head screw passes through the cross clamp and is fastened inside the cross clamp by a second clamping bolt; the long cylinder head screw and the first pointer nut are arranged crosswise, and the end of the long cylinder head screw is connected to the second pointer nut.

[0012] Further, the first pointer nut is screwed onto the end of the long screw of the fish-eye slip knot.

[0013] Further, the second pointer nut is screwed onto the end of the long cylinder head screw.

[0014] Further, the long screw of the fish-eye slip knot can be connected to a double-headed screw through a joint nut to increase the length of the long screw of the fish-eye slip knot.

[0015] Further, the end of the long cylinder head screw can be connected to a double-headed screw through a joint nut to increase the length of the long cylinder head screw.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) The clamp of the present utility model with a three-way expansion indicator is connected to the first pointer nut and the second pointer nut through the long screw of the fish-eye slip knot and the cross clamp, forming a three-way indication in the first dimension and the second dimension directions, and capable of measuring the thermal expansion displacement of the measured object in the third dimension direction. The first pointer nut and the second pointer nut have sufficient rigidity and tips, capable of accurately reading data, with a compact structure and convenient use.

[0018] (2) The clamp of the present utility model with a three-way expansion indicator has one end of the left clamp ring and the right clamp ring rotatably connected through a second pin shaft, without the need for manual tightening with tools, with a simple and practical structure, ensuring free opening during loading and unloading, simple operation. At the same time, the clamp has a compact structure and no loose parts, fully ensuring the efficiency of the clamp during loading and unloading.

[0019] (3) The clamp of the present utility model with a three-way expansion indicator can not only be used on the header outside the insulation layer, but also directly clamped on the header. The measured object is locked through the ratchet structure inside the clamp, capable of expanding and moving together with the measured object, and capable of accurately measuring the thermal expansion displacement. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the clamp of the present utility model;

[0021] Figure 2 is a schematic connection structural diagram of the cross clamp, the long cylinder head screw and the second pointer nut in the present utility model;

[0022] Figure 3 is a cross-sectional view of the cross clamp in the present utility model;

[0023] Figure 4 It is a schematic diagram of the connection structure of the joint nut and the double-headed screw in the present utility model.

[0024] The reference numerals are as follows: 1. Left snap ring, 2. Right snap ring, 3. Cross clip, 4. Eyebolt long screw, 5. First pointer nut, 6. Fish tail nut, 7. First pin shaft, 8. Second pin shaft, 9. Socket head cap screw, 10. Second pointer nut, 11. First clamping bolt, 12. Second clamping bolt, 13. Joint nut, 14. Double-headed screw, 15. Ratchet structure. Specific embodiments

[0025] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0026] Embodiment 1

[0027] As Figures 1-4 shown, the present utility model is a clamp with a three-way expansion indicator, including: a left snap ring 1, a right snap ring 2, a cross clip 3, an eyebolt long screw 4, a first pointer nut 5, a fish tail nut 6, and a second pointer nut 10;

[0028] One end of the left snap ring 1 and the right snap ring 2 is rotatably connected through the second pin shaft 8, and the other end is fastened through the eyebolt long screw 4 and the fish tail nut 6; the end of the eyebolt long screw 4 away from the left snap ring 1 and the right snap ring 2 is screwed with the first pointer nut 5, making the installation more convenient and improving the installation efficiency and safety of the device; the cross clip 3 is a cuboid made of aluminum, with fixing holes of the same size on adjacent two sides. The inner walls of the two fixing holes are smooth and are used to fix the eyebolt long screw 4 and the second pointer nut 10 in a cross arrangement. When installing and using, first rotate the fish tail nut 6 to open the left snap ring 1 and the right snap ring 2 and put them on the measured thermal equipment, then rotate the eyebolt long screw 4 to clamp it to the left snap ring 1 and the right snap ring 2, and tighten the clamp by tightening the fish tail nut 6, so that the left snap ring 1 and the right snap ring 2 can be locked through the cooperation of the eyebolt long screw 4 and the fish tail nut 6. At this time, the first pointer nut 5 and the second pointer nut 10 are arranged in a cross, forming a three-way indication in the first dimension and the second dimension directions, and can measure the thermal expansion displacement of the measured object in three dimension directions. The first pointer nut 5 and the second pointer nut 10 have sufficient rigidity and tips, and can accurately read the data. The structure is compact and easy to use. Specifically:

[0029] As Figure 1As shown, one end of the fish-eye slipknot long screw 4 is a fish-eye ring sleeve. The fish-eye ring sleeve is sleeved on the first pin 7 and axially connected to the left snap ring 1 through the first pin 7, enabling the fish-eye slipknot long screw 4 to rotate around the first pin 7. When the fish-eye slipknot long screw 4 rotates and is clamped within the left snap ring 1 and the right snap ring 2, the left snap ring 1 and the right snap ring 2 can be locked tightly by the fish-tail nut 6.

[0030] As Figures 1-3 shown, the cross clamp 3 is a cuboid. The fixing hole on one side is sleeved on the fish-eye slipknot long screw 4 and fastened by the first clamping bolt 11. A round head long screw 9 is inserted into the fixing hole on the other side, and the round head long screw 9 is fastened within the cross clamp 3 by the second clamping bolt 12. The second pointer nut 10 is screwed onto the end of the round head long screw 9. By screwing the round head long screw 9 and the second pointer nut 10, the installation is made more convenient, improving the installation efficiency and safety of the device.

[0031] Furthermore, as Figure 1 shown, both the inner ring sides of the left snap ring 1 and the right snap ring 2 have a toothed structure 15. The left snap ring 1 and the right snap ring 2 can further clamp cylindrical thermal equipment such as a boiler drum or a header. During the ignition or pressure increase process of the boiler, the measured component expands and displaces due to temperature and pressure changes. The measured object is locked by the toothed structure 15, causing the clamp and the measured object to expand and displace together, thereby driving the first pointer nut and the second pointer nut connected to the clamp to generate three-dimensional displacements relative to the 0 scale of the fixed scale plate, and then the thermal expansion displacement of the measured object can be accurately measured.

[0032] The three-dimensional displacement relative to the 0 scale of the fixed scale plate in this embodiment refers to: the expansion displacement amounts in the X direction parallel to the axial direction of the measured object, the Y direction in the radial direction perpendicular to the axial direction, and the Z direction in the direction inward and outward along the cross-section of the measured object. When recording, the displacement reading of the pointer of the first pointer nut 5 relative to the 0 scale represents the displacement of the measured object left and right along the axis and up and down in the radial direction, and the displacement amount of the pointer of the second pointer nut 10 relative to the 0 scale of the scale plate represents the displacement of the measured object inward and outward in the cross-section, forming an X, Y, Z three-dimensional measurement plane, so that measurements in the X, Y, Z three directions can be carried out.

[0033] Usually, the outer surface of the measured object is also wrapped with a heat insulation layer. When installing the clamp, the left snap ring 1, the right snap ring 2, the fish-eye slipknot long screw 4, and the fish-tail nut 6 need to be first installed and locked on the measured object, and then the heat insulation layer is laid, leaving the fish-eye slipknot long screw 4 extending outside the heat insulation layer. Then, the cross clamp 3, the round head long screw 9, and the second pointer nut 10 are installed in sequence. This not only ensures that the clamp and the pointer can expand and displace together with the measured object, but also can accurately reflect the expansion displacement amount without being affected by the heat insulation.

[0034] Embodiment 2

[0035] Embodiment 2 is completed on the basis of Embodiment 1. At the end of the fish-eye slipknot long screw 4 or the socket head cap screw 9, the length of the fish-eye slipknot long screw 4 or the socket head cap screw 9 is increased through the adapter nut 13 and the double-headed screw 14, so as to adjust the distance between the first pointer nut 5 or the second pointer nut 10 and the indicator board, ensuring that the tip of the first pointer nut 5 or the second pointer nut 10 can accurately and easily readably point to the zero position of the indicator board. During the actual installation and use process, it will be restricted by the installation space of the clamp and the indicator board. Specifically:

[0036] In a feasible implementation manner, by replacing the fish-eye slipknot long screws 4 or the socket head cap screws 9 with different lengths, the distance between the first pointer nut 5 or the second pointer nut 10 and the indicator board is adjusted.

[0037] Preferably, in this embodiment, Figure 4 As shown, the end of the fish-eye slipknot long screw 4 is screwed with the adapter nut 13, one end of the double-headed screw 14 is screwed into the adapter nut 13, and the first pointer nut 5 is screwed to the other end of the double-headed screw 14; the end of the socket head cap screw 9 is screwed with the adapter nut 13, one end of the double-headed screw 14 is screwed into the adapter nut 13, and the second pointer nut 10 is screwed to the other end of the double-headed screw 14. If the first pointer nut 5 or the second pointer nut 10 is too long, then screw the adapter nut 13 and the double-headed screw 14 inward to shorten the length of the first pointer nut 5 or the second pointer nut 10; if the first pointer nut 5 or the second pointer nut 10 is too short, then screw the adapter nut 13 and the double-headed screw 14 outward to increase the length of the first pointer nut 5 or the second pointer nut 10, so as to adjust the distance between the first pointer nut 5 or the second pointer nut 10 and the indicator board, ensuring that the pointer tip can accurately and easily readably point to the zero position of the indicator board. This feature makes the adjustment of the position of the first pointer nut 5 or the second pointer nut 10 more convenient, and increases the flexibility and adaptability of the device.

[0038] Working principle: Generally, the outer surface of the object to be measured is also wrapped with a heat insulation layer. When installing the clamp, the left clamp ring 1, the right clamp ring 2, the fish-eye slipknot long screw 4 and the fish-tail nut 6 need to be installed and locked on the object to be measured first, and then the heat insulation layer is laid, leaving the fish-eye slipknot long screw 4 extending outside the heat insulation layer. Then, the cross clamp 3, the socket head cap screw 9 and the second pointer nut 10 are installed in sequence. During the ignition or pressure boosting process of the boiler, the measured component expands and displaces due to temperature and pressure changes. The object to be measured is clamped by the ratchet structure 15, so that the clamp and the object to be measured expand and displace together, thereby driving the first pointer nut 5 and the second pointer nut 10 connected to the clamp to generate three-dimensional displacements relative to the 0 scale of the fixed scale plate, and then the thermal expansion displacement of the object to be measured can be accurately measured. The first pointer nut 5 and the second pointer nut 10 are connected by the fish-eye slipknot long screw 4 and the cross clamp 3 to form a three-dimensional indication in the first dimension and the second dimension directions, and can measure the thermal expansion displacement of the object to be measured in the three-dimensional direction. The first pointer nut 5 and the second pointer nut 10 have sufficient rigidity and tips to accurately read data, and the structure is compact and easy to use.

[0039] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present utility model and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0040] The above are only the preferred embodiments of this application, and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A clamp with a three-way expansion indicator, characterized in that: include: A left snap ring (1) and a right snap ring (2), wherein one end of the left snap ring (1) and the right snap ring (2) are rotatably connected via a second pin shaft (8), and the other end of the left snap ring (1) and the right snap ring (2) are fastened via a fisheye slipknot long screw (4) and a fishtail nut (6); The end of the fisheye slipknot long screw rod (4) away from the left snap ring (1) and the right snap ring (2) is connected to a first pointer nut (5), and the fisheye slipknot long screw rod (4) is connected to a second pointer nut (10) arranged in a cross shape with the first pointer nut (5) via a cross clamp (3).

2. A clamp with a three-way expansion indicator as claimed in claim 1, characterized in that: One end of the fisheye slipknot long screw rod (4) is axially connected to the left clamping ring (1) through a first pin shaft (7); the fisheye slipknot long screw rod (4) is clamped on the right clamping ring (2); the fishtail nut (6) is screwed on the fisheye slipknot long screw rod (4); the left clamping ring (1) and the right clamping ring (2) are locked by the fishtail nut (6).

3. A clamp with a three-way expansion indicator as claimed in claim 1, characterized in that: The inner ring sides of the left snap ring (1) and the right snap ring (2) both have a tooth structure (15).

4. A clamp with a three-way expansion indicator as claimed in claim 1, characterized in that: The cross clamp (3) is inserted into the fisheye slipknot long screw rod (4) and is fastened by a first clamping bolt (11).

5. A clamp with a three-way expansion indicator as claimed in claim 1, characterized in that: A cylindrical head long screw (9) passes through the cross clamp (3) and is fastened to the cross clamp (3) by a second clamping bolt (12); the cylindrical head long screw (9) and the first pointer nut (5) are arranged in a cross shape, and the end of the cylindrical head long screw (9) is connected to the second pointer nut (10).

6. A clamp with a three-way expansion indicator as claimed in claim 1, characterized in that: The first pointer nut (5) is threadedly connected to the end of the fisheye slipknot long screw rod (4).

7. A clamp with a three-way expansion indicator as claimed in claim 5, characterized in that: The second pointer nut (10) is threadedly screwed to the end of the cylindrical head long screw (9).

8. A clamp with a three-way expansion indicator as claimed in claim 1, characterized in that: The fisheye slipknot long screw rod (4) can be connected to a double-head screw rod (14) via a joint nut (13) to increase the length of the fisheye slipknot long screw rod (4).

9. A clamp with a three-way expansion indicator as claimed in claim 5, characterized in that: The end of the cylindrical head long screw (9) can be connected to a double-headed screw (14) via a joint nut (13) to increase the length of the cylindrical head long screw (9).

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