CN216385425U - Secondary filter screen axle head clearance measuring device - Google Patents
Secondary filter screen axle head clearance measuring device Download PDFInfo
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- CN216385425U CN216385425U CN202122445350.7U CN202122445350U CN216385425U CN 216385425 U CN216385425 U CN 216385425U CN 202122445350 U CN202122445350 U CN 202122445350U CN 216385425 U CN216385425 U CN 216385425U
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- dial indicator
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Abstract
The utility model discloses a device for measuring the shaft end gap of a secondary filter screen, wherein the secondary filter screen comprises a main shaft and a friction ring arranged on the periphery of the main shaft, and the device for measuring the shaft end gap of the secondary filter screen comprises a measuring rack arranged on the lower end surface of the main shaft, a dial indicator arranged on the measuring rack, and a display connected with the dial indicator through a transmission line. This secondary filter screen axle head clearance measuring device promotes maintenance efficiency, improves measurement accuracy, but continuous measurement, real-time feedback provide comfortable, convenient measuring condition for personnel simultaneously.
Description
Technical Field
The utility model relates to the field of nuclear power machinery maintenance, in particular to a device for measuring a shaft end gap of a secondary filter screen.
Background
The secondary filter screen runs through a fuel circulation period, and the structural form of the secondary filter screen can have a certain deviation. In order to ensure better filtering performance, and simultaneously have the functions of adjusting the verticality of the main shaft, adjusting the rotating friction resistance and the like, the gap (also called shaft end gap) between the end surface of the bottom of the main shaft and the lower end surface of the friction ring needs to be adjusted during each overhaul, and the gap is ensured to be within the design range.
The adjustment and measurement of the current shaft end clearance are realized by the cooperation of two groups of people. A group of people adjust the gap on the upper part of the mesh sheet by adjusting the fine adjustment bolt; the other group of people is under the mesh and measures with the knife edge ruler and the feeler gauge. The process has the following disadvantages:
the manpower demand is big: the upper part adjustment needs at least 1 person, and the bottom measurement needs 2 persons (1 person measurement, 1 person illumination and other auxiliary work);
difficulty in communication of people: at least 6 adjustment positions are involved, the upper and lower persons understand differently; in addition, due to the separation of the filter screens and the amplification effect of external sound in the container, the up-and-down communication is difficult, and the interference of external environment is easy to occur;
the efficiency is low: personnel need measurement and adjustment repeatedly, and the not smooth stack clearance gauge of intercommunication simultaneously selects and the reading time is long, and actual work takes time for a long time. Taking a certain power station as an example, adjusting the power station for about 1 day;
the error is large: whether the knife edge ruler is vertically arranged or not, the clearance gauge is selected to pass through force and the like have strong subjectivity, and the measurement result can be influenced;
the personnel measure the degree of difficulty greatly: people need to look up at the head for a long time to measure at an angle of nearly 90 degrees, which is easy to cause discomfort;
discontinuity: the personnel can only select a few points for measurement and cannot completely reflect the clearance between the two surfaces.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a device for measuring the shaft end clearance of a secondary filter screen.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a secondary filter screen axle head clearance measuring device, secondary filter screen include the main shaft, locate the friction ring of main shaft periphery is including being used for installing the measurement rack on the terminal surface under the main shaft, and install in measure percentage table on the rack, and with the display that the percentage table passes through transmission line connection.
Preferably, the measuring rack comprises a main body part, and a positioning part which is connected with the main body part and vertically extends downwards for contacting with the lower end face of the friction ring;
the end part of the positioning part far away from the main body part is provided with an L-shaped reference surface.
Preferably, the main body portion is detachably mounted to the main shaft by a fastener.
Preferably, the main body is provided with a mounting hole penetrating through the upper and lower surfaces thereof;
the fastener comprises a bolt which is used for penetrating the mounting hole to be installed into the screw hole on the lower end face of the main shaft.
Preferably, the bolt comprises a cylindrical portion and a head portion connected to the cylindrical portion;
the cylindrical part is positioned between the end face of the main body part and the head part, and a spring is sleeved on the periphery of one section of the cylindrical part between the end face of the main body part and the head part.
Preferably, the dial indicators are three at intervals;
and a positioning frame for mounting the dial indicator is arranged on the side surface of the main body part.
Preferably, the positioning frame comprises a connecting part detachably mounted on the side surface of the main body part, and a clamping part connected with one end of the connecting part far away from the main body part; the clamping part is provided with a mounting groove for mounting the dial indicator.
Preferably, the clamping portion comprises a first clamping arm and a second clamping arm which are arranged in parallel, and opposite side walls of the first clamping arm and the second clamping arm are respectively provided with a first groove and a second groove in a concave manner; the first groove and the second groove are matched to form the mounting groove;
the clamping device comprises a first clamping arm, a second clamping arm and a locking piece, wherein the first clamping arm and the second clamping arm are arranged in a penetrating mode;
the dial indicator is arranged in the mounting groove, and a measuring rod of the dial indicator is abutted to the lower end face of the main shaft.
Preferably, the secondary filter screen shaft end gap measuring device further comprises a calibration component for calibrating and calibrating the reference zero position of the measuring rack assembled with the dial indicator.
Preferably, the verification assembly comprises an annular part, and a step part matched with the L-shaped reference surface is arranged on the radial outer side surface of the annular part.
The implementation of the utility model has the following beneficial effects: this secondary filter screen axle head clearance measuring device promotes maintenance efficiency, improves measurement accuracy, but continuous measurement, real-time feedback provide comfortable, convenient measuring condition for personnel simultaneously.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of an application of a secondary screen shaft end gap measuring device of the present invention;
FIG. 2 is a schematic view of another application of the secondary strainer shaft end gap measuring device of the present invention;
FIG. 3 is a schematic structural diagram of a secondary filter screen shaft end gap measuring device of the present invention;
FIG. 4 is a detail view of portion A of FIG. 3;
FIG. 5 is a schematic diagram of a verification assembly according to the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it is to be understood that the orientations and positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "lateral", "vertical", "horizontal", "top", "bottom", "inner", "outer", "leading", "trailing", and the like are configured and operated in specific orientations based on the orientations and positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate that the device or element referred to must have a specific orientation, and thus, are not to be construed as limiting the present invention.
It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 5, the secondary filter screen 100 includes a main body, a main shaft 101 disposed in the main body, a friction ring 102 disposed at an outer periphery of the main shaft 101, and a filter screen 103 connecting an outer periphery of the friction ring 102 and an inner wall of the main body.
The device for measuring the shaft end gap of the secondary filter screen comprises a measuring rack 1 arranged on the lower end face of a main shaft 101, a dial indicator 2 arranged on the measuring rack 1, and a display 4 connected with the dial indicator 2 through a transmission line 3.
As shown in fig. 2, in the present embodiment, the measuring stand 1 includes a main body 11, and positioning portions 12 connected to the main body 11 and extending vertically downward for contacting with the lower end face of the friction ring 102, and the positioning portions 12 may be three disposed at intervals of 120 °. Preferably, to ensure portability, the measuring stand 1 may be made of aluminum alloy.
Preferably, the end of each positioning portion 12 away from the main body 11 is provided with an L-shaped reference surface 121, and the L-shaped reference surface 121 mainly comprises a horizontal surface facing the lower end surface of the friction ring 102 and a vertical surface connected with the horizontal surface and facing the outer side surface of the lower end of the friction ring 102.
Further, the main body 11 is detachably mounted on the main shaft 101 by a fastening member 5, the main body 11 is provided with a mounting hole 111 penetrating through the upper and lower surfaces thereof, and the fastening member 5 includes a bolt 51 for passing through the mounting hole 111 to be fitted into a screw hole of the lower end surface of the main shaft 101.
Preferably, the bolt 51 includes a column portion 511 and a head portion 512 connected to the column portion 511, and a section of the column portion 511 between the end surface of the main body portion 11 and the head portion 512 is peripherally sleeved with the spring 52. It can be understood that after the measurement bench 1 and the dial indicator 2 are installed, the spring 52 provides a tight force to the measurement bench 1, so as to ensure that the L-shaped reference surface 121 of the measurement bench 1 is always tightly attached to the lower end surface of the friction ring 102 in the measurement process.
In this embodiment, the dial indicator 2 may include a head, a support rod connected to the head, and a measuring rod (or a pointer) telescopically inserted into the support rod to connect to the head, preferably, the dial indicator 2 is three at intervals, and further, the dial indicator 2 is a digital display dial indicator, 3 in total, each having a USB interface, and capable of transmitting a measurement result. In this embodiment, the transmission line 3 is a transmission line between the dial indicator and the display screen, and the transmission line may be of a specific type and may pass through the gravel filter mesh. Preferably, each dial indicator 2 is connected to a display 4 via a transmission line 3. The display 4 can show the registration of percentage table 2 in real time, makes things convenient for the top adjustment personnel to observe.
As shown in fig. 3 to 4, in the present embodiment, a positioning frame 6 for mounting the dial indicator 2 is provided on a side surface of the main body 11. The positioning frame can be three and is arranged at intervals of 120 degrees in the circumferential direction, preferably, the positioning frame 6 comprises a connecting part 61 which is detachably arranged on the side surface of the main body part 11, a clamping part 62 which is connected with one end, far away from the main body part 11, of the connecting part 61, and the clamping part 62 is provided with a mounting groove 623 for mounting the dial indicator 2. The connecting portion 61 may be detachably attached to the main body portion 11 by bolts, screws, or the like.
Further, the clamping portion 62 includes a first clamping arm 621 and a second clamping arm 622 that are disposed in parallel, and opposite sidewalls of the first clamping arm 621 and the second clamping arm 622 are respectively provided with a first groove and a second groove in a concave manner, wherein the first groove and the second groove cooperate to form a mounting groove 623.
The positioning frame 6 further comprises a locking member 63, wherein the locking member 63 is disposed through the first clamping arm 621 and the second clamping arm 622 to fasten the first clamping arm 621 and the second clamping arm 622 together.
Wherein, percentage table 2 installs in mounting groove 623 and its measuring stick and main shaft 101 lower extreme butt, and is concrete, and the bracing piece cartridge of this percentage table 2 is in mounting groove 623, through the fastening condition of the adjustable percentage table 2 of retaining member 63, applicable in the percentage table of multiple size.
Referring to fig. 5, the secondary filter screen shaft end gap measuring device further includes a calibration component 7 for calibrating and calibrating the reference zero position after the measuring rack 1 and the dial indicator 2 are assembled. The checking assembly 7 comprises an annular part 71, and a step part 72 matched with an L-shaped reference surface 121 is arranged on the radial outer side surface of the annular part 71. To ensure the stability, the checking assembly 7 is designed as a stainless steel structure, the surface is a finish machining, and preferably, the checking assembly 7 is a one-piece structure. After the dial indicator 2 is installed, the checking component 7 ensures that initially, the zero position of the dial indicator 2 and the L-shaped reference surface 121 (which is equal to the lower end surface of the friction ring 102) in the measurement bench 1 are in the same plane.
In this embodiment, the secondary screen shaft end gap measuring device works as follows:
before measurement, the dial indicator 2 is fixed on the positioning frame 6 of the measurement rack 1, and zero calibration is carried out by the calibration component 7, so that the zero of the dial indicator 2 is ensured to correspond to the position of the lower end face of the friction ring 102.
During installation, the measuring stand 1 is connected with the main shaft 101 through the bolt 51 and the spring 52, and under the reaction force of the spring 52, the L-shaped reference surface 121 of the measuring stand 1 is always attached to the lower end surface of the friction ring 102, and the measuring rod (or the pointer) of the dial indicator 2 is in contact with the lower end surface of the main shaft 101.
During measurement, a person rotates the main shaft 101 above the filter screen 103, and the reading of the dial indicator 2 is the real gap between the lower end face of the main shaft 101 and the lower end face of the friction ring 102. The upper adjustment personnel can read the lower gap through the display 4. The necessary adjustments to secondary screen 100 may then be made based on the readings.
Compared with the traditional handheld vernier caliper measuring process, the secondary filter screen shaft end gap measuring device has the following advantages:
1) manpower is saved: the new tool is used, and the work of measuring and adjusting the shaft end clearance can be completed by only 1 person;
2) the efficiency is improved: the time of an overhaul window of 3 working days can be shortened by single overhaul;
3) the precision is high: the precision can reach 0.001 mm;
4) the operation is convenient: the measuring bench 1 is made of aluminum alloy, so that the whole measuring device is extremely light and convenient, and the installation and measuring processes are simple and convenient;
5) and (3) continuous measurement: the gap values of all positions of a circle can be measured, and the deviation of the original random point selection measurement is eliminated;
6) improving the working state of personnel: the head does not need to be raised for long-time operation, and the operation is more convenient.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the utility model, are given by way of illustration and description, and are not to be construed as limiting the scope of the utility model; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a secondary filter screen axle head clearance measuring device, secondary filter screen (100) include main shaft (101), locate friction ring (102) of main shaft (101) periphery, its characterized in that, including being used for installing measuring rack (1) on main shaft (101) lower terminal surface, and install in percentage table (2) on measuring rack (1), and with display (4) that percentage table (2) are connected through transmission line (3).
2. The secondary screen shaft end gap measuring device according to claim 1, characterized in that the measuring stand (1) comprises a main body part (11), a positioning part (12) connected with the main body part (11) and vertically extending downwards for contacting with the lower end surface of the friction ring (102);
an L-shaped reference surface (121) is arranged at the end part of the positioning part (12) far away from the main body part (11).
3. A secondary screen shaft end gap measuring device according to claim 2, characterized in that the main body part (11) is detachably mounted on the main shaft (101) by means of a fastening element (5).
4. The secondary screen shaft end gap measuring device according to claim 3, wherein the main body portion (11) is provided with a mounting hole (111) penetrating upper and lower surfaces thereof;
the fastener (5) comprises a bolt (51) which is used for penetrating the mounting hole (111) to be installed in a screw hole on the lower end face of the main shaft (101).
5. A secondary screen shaft end gap measuring device according to claim 4, characterized in that the bolt (51) comprises a cylindrical portion (511) and a head portion (512) connected to the cylindrical portion (511);
and a spring (52) is sleeved on the periphery of the section of the columnar part (511) between the end surface of the main body part (11) and the head part (512).
6. The secondary screen shaft end gap measuring device according to any one of claims 2 to 5, wherein the dial indicators (2) are three at intervals;
and a positioning frame (6) for mounting the dial indicator (2) is arranged on the side surface of the main body part (11).
7. The secondary screen shaft end gap measuring device of claim 6, wherein the positioning frame (6) comprises a connecting part (61) detachably mounted on the side surface of the main body part (11), and a clamping part (62) connected with one end of the connecting part (61) far away from the main body part (11); the clamping part (62) is provided with a mounting groove (623) for mounting the dial indicator (2).
8. The secondary screen shaft end gap measuring device of claim 7, wherein the clamping portion (62) comprises a first clamping arm (621) and a second clamping arm (622) which are arranged in parallel, and opposite side walls of the first clamping arm (621) and the second clamping arm (622) are respectively provided with a first groove and a second groove in a concave manner; the first groove and the second groove are matched to form the mounting groove (623);
the clamping device further comprises a locking piece (63), wherein the locking piece (63) penetrates through the first clamping arm (621) and the second clamping arm (622) to fasten the first clamping arm (621) and the second clamping arm (622) together;
the dial indicator (2) is arranged in the mounting groove (623), and a measuring rod of the dial indicator is abutted to the lower end face of the main shaft (101).
9. The secondary screen shaft end clearance measuring device of claim 2, further comprising a calibration component (7) for calibrating and calibrating the reference zero position of the assembled measuring rack (1) and the dial indicator (2).
10. A secondary screen shaft end gap measuring device according to claim 9, characterized in that the verifying member (7) comprises a ring-shaped portion (71), the radially outer side of the ring-shaped portion (71) being provided with a step (72) cooperating with the L-shaped reference surface (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122445350.7U CN216385425U (en) | 2021-10-11 | 2021-10-11 | Secondary filter screen axle head clearance measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122445350.7U CN216385425U (en) | 2021-10-11 | 2021-10-11 | Secondary filter screen axle head clearance measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216385425U true CN216385425U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122445350.7U Active CN216385425U (en) | 2021-10-11 | 2021-10-11 | Secondary filter screen axle head clearance measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216385425U (en) |
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2021
- 2021-10-11 CN CN202122445350.7U patent/CN216385425U/en active Active
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