Equipment for rapidly and accurately measuring hole bridge of pipe hole

Abstract

The utility model relates to the technical field of nuclear power equipment, in particular to equipment for quickly and accurately measuring a hole bridge of a pipe hole. The equipment for rapidly and accurately measuring the hole bridge of the pipe hole specifically comprises a movable measuring head, a fixed measuring head, a base, a dial indicator, a rotating piece and a resetting piece, the movable measuring head is rotationally connected with the base through the rotating piece, and the fixed measuring head is detachably connected with the base; the dial indicator comprises a dial plate and a measuring rod, the dial plate is movably connected with the measuring rod, the measuring rod is fixedly connected with the movable measuring head, and the reset piece sleeves the measuring rod. The device has the advantages of small measurement error and high measurement efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power equipment, in particular to a device for quickly and accurately measuring a pipe hole bridge. Background Art

[0002] The nuclear power main equipment steam generator tube bundle assembly is the core heat exchange component of the steam generator, and is a physical barrier between the primary and secondary sides, which plays an important role in the safe operation and function of the steam generator. The tube bundle assembly is mainly composed of tube sheets, heat exchange tubes, tube support plates and other parts. The tube sheet holes correspond to the tube holes of the tube support plates one by one. The heat exchange tubes pass through the tube support plates into the tube sheet holes, and are fixed and connected on the primary side of the tube sheet by sealing welding, hydraulic expansion and other methods to form the primary and secondary sides of the reactor. The tube sheet holes and the tube holes of the tube support plates are arranged in a triangular rule. The hole spacing, hole diameter, primary side surface position, tube hole verticality, and tube sheet secondary side hole bridge are the main control parameters and acceptance indicators.

[0003] Due to the need for heat exchange, the tube holes of the tube support plate are designed as three-leaf special-shaped holes, and the theoretical thickness of the hole bridge is only 3.16mm. The thickness of the hole bridge is an important assessment indicator of the strength of the tube support plate. If the hole bridge is thinned, the strength of the support plate will fail and affect the safe operation of the equipment. Therefore, when processing the tube plate holes and tube support plate tubes, it is necessary to strictly control the hole bridge to ensure that it is not less than the specified requirement value to ensure the safe operation of the equipment.

[0004] The existing method is to directly measure the hole bridge thickness by using a vernier caliper, which has low measurement efficiency; it is difficult to find the minimum hole diameter, and repeated adjustments are required, resulting in large measurement errors; due to structural limitations, the hole bridge at the edge is difficult to measure.

[0005] Therefore, in view of the deficiencies in the prior art, a device for quickly and accurately measuring pipe hole bridges is provided. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a device for quickly and accurately measuring pipe hole bridges, which is intended to solve the problems of large measurement errors and low measurement efficiency.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A device for quickly and accurately measuring pipe hole bridges, comprising: a movable probe, a fixed probe, a base, a dial indicator, a rotating part and a reset part;

[0009] The movable probe is rotatably connected to the base via the rotating member, and the fixed probe is detachably connected to the base;

[0010] The dial indicator comprises a dial and a measuring rod, the dial is movably connected to the measuring rod, the measuring rod is fixedly connected to the movable measuring head, and the reset member is sleeved on the measuring rod.

[0011] As a further improvement of the technical solution of the utility model, the movable probe includes a movable rod, the rotating part includes a bolt and a first nut, the bolt is threadedly connected to the first nut, the movable rod is provided with a through hole for the bolt to pass through, and the movable rod is rotatably connected to the bolt.

[0012] As a further improvement of the technical solution of the utility model, the movable probe further includes a lower arc surface located below the movable rod, and the lower arc surface is in linear contact with the inner wall of the hole.

[0013] As a further improvement of the technical solution of the utility model, the dial indicator also includes a rod sleeve, and the rod sleeve is fixedly connected to the dial.

[0014] As a further improvement of the technical solution of the utility model, the base includes a fixed base and a clamping bolt, the fixed base is fixedly connected to the base, and the fixed base is fixedly connected to the rod sleeve through the clamping bolt.

[0015] As a further improvement of the technical solution of the utility model, the fixed probe includes a sphere, a threaded rod and a second nut, the sphere is fixedly connected to the threaded rod, and the threaded rod is threadedly connected to the second nut.

[0016] As a further improvement of the technical solution of the utility model, the base is provided with a first groove and a second groove, and the threaded rod is inserted into the first groove and the second groove in sequence and then threadedly connected with the second nut, and the second nut is fixed in the second groove.

[0017] As a further improvement of the technical solution of the utility model, one end of the base away from the dial indicator is a plane.

[0018] As a further improvement of the technical solution of the utility model, the reset member is a reset spring.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] In the device for quickly and accurately measuring the pipe hole and the hole bridge of the utility model, the width of the hole bridge to be measured is first determined by a vernier caliper, and a gauge block of suitable thickness (T) is inserted between the measuring port formed by the movable probe and the fixed probe. When measuring, the measuring port is inserted into the hole bridge and slightly adjusted. After finding the correct measuring position, the change value (△T) of the dial indicator is read, and the actual measured value of the hole bridge is T+△T. The device for quickly and accurately measuring the pipe hole and the hole bridge has the characteristics of small measurement error and high measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technology of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0022] Figure 1 It is a schematic diagram of the structure of the device for quickly and accurately measuring the pipe hole and the hole bridge of the utility model;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the utility model of a device for quickly and accurately measuring pipe holes and hole bridges.

[0024] In the figure:

[0025] 1. Movable probe; 11. Movable rod; 12. Lower arc surface;

[0026] 2. Fixed probe; 21. Sphere;

[0027] 3. Base; 31. Fixed base; 32. Clamping bolt;

[0028] 4. dial indicator; 41. dial; 42. measuring rod; 43. rod cover;

[0029] 5. Rotating parts;

[0030] 6. Reset parts;

[0031] 7. Kongqiao. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, scheme and effect of the utility model. It should be noted that the embodiments and features in the embodiments in this application can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0033] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0034] Reference Figure 1 to Figure 2 , a device for quickly and accurately measuring a pipe hole bridge, comprising a movable probe 1, a fixed probe 2, a base 3, a dial indicator 4, a rotating part 5 and a reset part 6;

[0035] In one embodiment, the movable probe 1 is rotatably connected to the base 3 through a rotating member 5, and the fixed probe 2 is detachably connected to the base 3; the dial gauge 4 includes a dial 41 and a measuring rod 42, the dial 41 is movably connected to the measuring rod 42, the measuring rod 42 is fixedly connected to the movable probe 1, and the reset member 6 is sleeved with the measuring rod 42. The lower arc surface 12 of the movable probe 1 and the sphere 21 of the fixed probe 2 can adapt to the minimum position of the hole bridge 7; at the same time, the measuring point is aligned through the flat back of the base 3.

[0036] Among them, first use a vernier caliper to determine the width of the hole bridge 7 to be measured, and use a gauge block of appropriate thickness (T) to insert between the measuring port formed by the movable probe 1 and the fixed probe 2. When measuring, insert the measuring port into the hole bridge 7 and make slight adjustments. After finding the correct measuring position, read the change value (△T) of the dial indicator 4, and the actual measured value of the hole bridge 7 is T+△T. This equipment for quickly and accurately measuring the hole bridge 7 of the pipe hole has the characteristics of small measurement error and high measurement efficiency. At the same time, the measurement of hole bridges 7 of various specifications can be adapted by adjusting the size of the measuring position of the movable probe 1 and the fixed probe 2.

[0037] In one embodiment, the movable probe 1 includes a movable rod 11 and a lower arc surface 12 located below the movable rod 11, ensuring that the lower arc surface 12 is in linear contact with the inner wall of the hole during measurement, and the bottom thereof has a circular arc chamfer, which has a guiding function and facilitates rapid insertion into the hole bridge 7. The rotating member 5 includes a bolt and a first nut, the bolt is threadedly connected to the first nut, the movable rod 11 is provided with a through hole for the bolt to penetrate, and the movable rod 11 is rotatably connected to the bolt.

[0038] In one embodiment, the dial gauge 4 further includes a rod sleeve 43, which is fixedly connected to the dial 41. The two ends of the reset member are respectively connected to the movable rod 11 and the rod sleeve 43. Preferably, the reset member is a reset spring, and when the device is used for measurement, the measuring port is opened, resulting in compression of the reset spring, which is reset by the reset spring when the measurement is completed.

[0039] In one embodiment, the base 3 includes a fixed base 31 and a clamping bolt 32. The fixed base 31 is fixedly connected to the base 3. The fixed base 31 is fixedly connected to the rod sleeve 43 through the clamping bolt 32, and the extension length of the measuring rod 42 of the dial indicator 4 can be adjusted.

[0040] In one embodiment, the fixed probe 2 includes a sphere 21, a threaded rod and a second nut. The sphere 21 is fixedly connected to the threaded rod, and the threaded rod is threadedly connected to the second nut. The base 3 is provided with a first groove and a second groove. The threaded rod is inserted into the first groove and the second groove in sequence and then threadedly connected to the second nut. The second nut is fixed in the second groove. When calibrating, the length of the sphere 21 extending out of the lower end surface of the base 3 is adjusted so that the measured dimensional change is accurately transmitted to the dial indicator 4.

[0041] In one embodiment, one end of the base 3 facing away from the dial indicator 4 is a flat surface, which can be used to find a quick leveling probe.

[0042] After the equipment is connected, manually pull up the measuring rod 42 of the dial gauge 4 to ensure that the pressure gauge reading is at least 3 mm.

[0043] During measurement, use a depth gauge to measure the distance between the fixed probe 2 and the lower surface of the base 3; use a depth gauge to measure the distance between the measuring rod 42 of the dial indicator 4 and the upper surface of the base 3; adjust the extension distance of the fixed probe 2, and according to the equilateral triangle principle, make the distance from the center of the sphere 21 of the fixed probe 2 to the lower surface of the base 3 equal to the distance from the center of the measuring rod 42 of the dial indicator 4 to the upper surface of the base 3; use a vernier caliper to determine the width of the hole bridge 7 to be measured, such as the measured thickness of the hole bridge 7 is 5mm±0.5mm ; Use a gauge block with a suitable thickness (T) of 5mm to insert between the fixed probe 2 and the movable probe 1. At the same time, adjust the position of the dial indicator 4 through the fixed holder 31 and the clamping bolt 32 so that the pressure gauge is 3mm, and return the dial indicator 4 to zero; when measuring, insert the measuring port into the hole bridge 7 and make slight adjustments. After finding the correct measuring position, read the change value on the dial indicator 4. Assuming that the change of the dial indicator 4 is 0.2mm, the actual measured value of the hole bridge 7 is 5mm+0.2mm.

[0044] For other contents of the device for quickly and accurately measuring pipe holes and hole bridges described in the utility model, please refer to the prior art and will not be repeated here.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A device for quickly and accurately measuring pipe hole bridges, characterized in that: include: Movable probe, fixed probe, base, dial indicator, rotating part and reset part; The movable probe is rotatably connected to the base via the rotating member, and the fixed probe is detachably connected to the base; The dial indicator comprises a dial and a measuring rod, the dial is movably connected to the measuring rod, the measuring rod is fixedly connected to the movable measuring head, and the reset member is sleeved on the measuring rod.

2. The device for quickly and accurately measuring pipe hole bridges according to claim 1 is characterized in that: The movable probe comprises a movable rod, the rotating member comprises a bolt and a first nut, the bolt is threadedly connected to the first nut, the movable rod is provided with a through hole for the bolt to penetrate, and the movable rod is rotatably connected to the bolt.

3. The device for quickly and accurately measuring pipe hole bridges according to claim 2 is characterized in that: The movable probe further comprises a lower arc surface located below the movable rod, and the lower arc surface is in linear contact with the inner wall of the hole.

4. The device for quickly and accurately measuring pipe hole bridges according to claim 1 is characterized in that: The dial indicator also includes a rod sleeve, which is fixedly connected to the dial.

5. The device for quickly and accurately measuring pipe hole bridges according to claim 4 is characterized in that: The base comprises a fixed base and a clamping bolt, wherein the fixed base is fixedly connected to the base, and the fixed base is fixedly connected to the rod sleeve via the clamping bolt.

6. The device for quickly and accurately measuring pipe hole bridges according to claim 1 is characterized in that: The fixed probe comprises a sphere, a threaded rod and a second nut. The sphere is fixedly connected to the threaded rod, and the threaded rod is threadedly connected to the second nut.

7. The device for quickly and accurately measuring pipe hole bridges according to claim 6 is characterized in that: The base is provided with a first groove and a second groove. The threaded rod is inserted into the first groove and the second groove in sequence and then threadedly connected with the second nut. The second nut is fixed in the second groove.

8. The device for rapid and accurate measurement of pipe hole bridges according to claim 1, characterized in that: One end of the base facing away from the dial indicator is a plane.

9. The device for quickly and accurately measuring pipe hole bridges according to claim 5, characterized in that: The reset element is a reset spring.

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