CN213775672U

CN213775672U - Main pump phase measuring device

Info

Publication number: CN213775672U
Application number: CN202022344573.XU
Authority: CN
Inventors: 李百栋; 栾振兴; 朱建成; 杨建东; 王琪; 李鸿飞; 徐洋洋; 左双龙; 周淋; 程彬
Original assignee: China General Nuclear Power Corp; Guangxi Fangchenggang Nuclear Power Co Ltd
Current assignee: China General Nuclear Power Corp; Guangxi Fangchenggang Nuclear Power Co Ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-07-23
Anticipated expiration: 2030-10-20

Abstract

The utility model discloses a main pump phase measuring device, which comprises a bracket arranged on a main pump, a sleeve arranged on the bracket and vertical to the axial direction of a motor shaft of the main pump, and a displacement sensor; the sleeve is provided with a first end and a second end which are opposite to each other, and the displacement sensor is inserted into the first end of the sleeve and is opposite to the convex pin or the key groove gap on the motor shaft. The utility model discloses a main pump phase place measuring device for the main pump phase place is measured, and easy operation realizes acquireing the phase signal of main pump in daily operation process, reduces the operation of external equipment measurement phase place information in the overhaul stage, and then has reduced the time of overhaul key path.

Description

Main pump phase measuring device

Technical Field

The utility model relates to a nuclear power equipment measures technical field, especially relates to a main pump phase place measuring device.

Background

In a nuclear power plant, a primary coolant pump is generally only provided with a rotating speed measuring device and is not provided with a phase measuring device, a phase signal cannot be obtained in the daily operation process of equipment, and external equipment is required to measure phase information when the dynamic balance of the equipment is required to be implemented to reduce the vibration of the equipment in the overhaul stage, so that the time of overhauling a critical path is directly increased, and the power generation of the power plant is not favorable.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a realize main pump phase measurement's main pump phase measurement device.

The utility model provides a technical scheme that its technical problem adopted is: the main pump phase measuring device comprises a support, a sleeve and a displacement sensor, wherein the support is used for being mounted on a main pump;

the sleeve is provided with a first end and a second end which are opposite to each other, and the displacement sensor is inserted into the first end of the sleeve and is opposite to the convex pin or the key groove gap on the motor shaft.

Preferably, the bracket comprises a support cylinder, a fixing plate for fixing on the main pump, and a connecting plate connected between the support cylinder and the fixing plate; the fixing plate is provided with at least one fixing hole for the bolt to penetrate through.

Preferably, the sleeve penetrates through the branch cylinder and is in threaded fit with the branch cylinder; the first end and the second end of the sleeve respectively extend out of the two opposite ends of the support cylinder.

Preferably, the main pump phase measuring device further comprises a lock nut fitted on the second end of the sleeve to fix the sleeve and the support cylinder relatively.

Preferably, the internal channel of the sleeve comprises a positioning channel located in the first end and adapted to the displacement sensor, and a cable passing channel located in the second end and through which a cable for connecting the displacement sensor passes;

the cable passing channel is communicated with the positioning channel in an extending way; the displacement sensor is inserted in the positioning channel, and the probe part of the displacement sensor is positioned outside the positioning channel to be opposite to the gap of the convex needle or the key slot on the motor shaft.

Preferably, the positioning channel and the displacement sensor are in threaded engagement.

Preferably, the displacement sensor is sleeved with a nut for fixing the displacement sensor and the sleeve relatively.

Preferably, the clearance between the displacement sensor and the convex needle or the key groove on the motor shaft is less than or equal to 1 mm.

Preferably, the main pump phase measuring device further comprises a joint electrically connected with the displacement sensor; the adapter is attached to the second end of the sleeve.

Preferably, the periphery of the second end of the sleeve is provided with a protruding annular step, and the annular step is provided with at least one connecting hole; the joint is inserted into the second end of the sleeve, the limiting bulge on the periphery of the joint is abutted to the annular step and is arranged in the limiting bulge and the annular step in a penetrating mode through bolts to fixedly connect the limiting bulge and the annular step.

The utility model discloses a main pump phase place measuring device for the main pump phase place is measured, and easy operation realizes acquireing the phase signal of main pump in daily operation process, reduces the operation of external equipment measurement phase place information in the overhaul stage, and then has reduced the time of overhaul key path.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram (partially cross-sectional view) of a main pump phase measuring apparatus according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structure diagram of a sleeve in a phase measuring device of a main pump according to an embodiment of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a main pump phase place measuring device of embodiment for install on the main pump, realize the phase place measurement of main pump. The measuring device may include a holder 10, a sleeve 20, and a displacement sensor 30; the bracket 10 is used for being mounted on a main pump, and the sleeve 20 is arranged on the bracket 10 and is perpendicular to the axial direction of a motor shaft of the main pump. The displacement sensor 30 is arranged on the sleeve 20 and is opposite to the gap of the convex pin or the key slot on the motor shaft; the motor shaft rotates to drive the convex needle (or the key groove) to pass through the displacement sensor 30, time gap changes, then gap voltage changes, and the triggering of a phase signal is realized by recognizing the change, so that phase measurement is realized.

The clearance between the displacement sensor 30 and the convex needle or the key groove is preferably less than or equal to 1mm, and further preferably 0.85mm-1 mm.

The bracket 10 may include a support tube 11, a fixing plate 13, and a connecting plate 12 connected between the support tube 11 and the fixing plate 13. The support 11 is a cylinder body with two open ends for the sleeve 20 to be disposed therein. The fastening plate 13 is intended to be fastened to the main pump, so that the holder 10 and thus the entire measuring device is fastened to the main pump.

Specifically, on the main pump, the bracket 10 is fixed to an instrument mounting bracket at the lower part of the main pump motor mainly through a fixing plate 13. The fixing plate 13 is provided with at least one fixing hole 131 for a bolt to penetrate through to fasten the fixing plate 13 to the instrument mounting bracket. The length of the connection plate 12 between the support tube 11 and the fixing plate 13 is set according to the position of the protruding pin (or key groove) on the motor shaft so that the displacement sensor 30 can be on the same plane and opposite to the protruding pin (or key groove).

As shown in fig. 1 and 2, the sleeve 20 has a cylindrical structure with both ends open. In the axial direction of the sleeve 20, the sleeve 20 has opposite first and

second ends

21 and 22, and an internal passage of the sleeve 20 passes through the first and

second ends

21 and 22. The sleeve 20 is arranged in the support tube 11 in a penetrating way and is in threaded fit with the support tube 11; the first end 21 and the second end 22 of the sleeve 20 extend out of the opposite ends of the leg 11, respectively. The displacement sensor 30 is inserted into the first end 21 of the sleeve 20, and the probe part of the displacement sensor 30 is opposite to the gap between the convex pin or the key slot on the motor shaft outside the first end 21.

Wherein, screw-thread fit between sleeve 20 and a branch section of thick bamboo 11, the periphery side of sleeve 20 is equipped with the external screw thread promptly, props up section of thick bamboo 11 internal wall and is equipped with the internal thread with external screw thread matched with. The thread fit between the sleeve 20 and the support tube 11 is such that the sleeve 20 can move along the axial direction of the support tube 11, so as to adjust the length of the first end 21 extending out of the support tube 11, and further adjust the distance between the displacement sensor 30 and the protruding pin (or key slot) on the motor shaft to the required clearance range.

Corresponding to the thread fit mode between the sleeve 20 and the branch tube 11, the main pump phase measuring device further comprises a lock nut 40, which is used for being fitted on the second end 21 of the sleeve 20 and abutting against the sleeve 20 to relatively fix the sleeve 20 and the branch tube 11.

The cylindrical configuration of the sleeve 20 is such that it has an internal passage. The internal passage of sleeve 20 includes a positioning passage 201 in first end 21, and a cable passage 202 in second end 22.

The positioning channel 201 is adapted to the displacement sensor 30, so that the displacement sensor 30 can be inserted into the positioning channel 201 and positioned, and the probe of the displacement sensor 30 is located outside the positioning channel 201 to be opposite to the convex pin or the key slot on the motor shaft. The positioning channel 201 is in threaded fit with the displacement sensor 30, namely, an external thread is arranged on the periphery of the displacement sensor 30, and an internal thread is arranged in the positioning channel 201. The displacement sensor 30 is screwed into the positioning channel 201 in a rotating manner, and the displacement sensor 30 is fixed on the positioning channel 201 through the matching of the internal thread and the external thread.

In order to improve the stability of the displacement sensor 30 on the sleeve 20, a nut 31 may be sleeved on the displacement sensor 30, and the displacement sensor 30 and the sleeve 20 may be relatively fixed by abutting the nut 21 at the first end face of the sleeve 20.

Within the sleeve 20, a cable passage 202 extends in communication with the positioning passage 20, through which a cable for connecting the displacement sensor 30 passes, the cable being passable through the cable passage 202 to the outside of the sleeve 20 to connect to a corresponding terminal device for transmitting a signal of the displacement sensor 30 to the terminal device.

In this embodiment, as shown in FIG. 2, the inner diameter of the cable passage 202 is larger than the inner diameter of the positioning passage 201 to provide sufficient space for the cable to pass through.

Further, the phase measuring device of the main pump of the present invention may further include a connector 50 electrically connected to the displacement sensor 30. A connector 50 is attached to the second end 22 of the sleeve 20 for connection to a transmission cable for transmitting the measured signal to a terminal device.

The periphery of the second end 22 of the corresponding joint 40 and the sleeve 20 is provided with a protruding annular step 23, and the annular step 23 is provided with at least one connecting hole 203 for the bolt to penetrate through. The joint 50 is inserted into the second end 22 of the sleeve 20, the limiting protrusion on the periphery of the joint 50 abuts against the annular step 23, and the limiting protrusion and the annular step 23 are fixedly connected through a bolt which is arranged in the connecting hole 203 of the limiting protrusion and the annular step 23 in a penetrating mode.

Alternatively, the connector 30 may be a JUPITER quick connector.

The utility model discloses a main pump phase place measuring device not only can be used for the phase place of main pump to measure, can also be used for other equipment that need the phase place to measure. The measuring device is formed by assembling the components such as the support 10, the sleeve 20, the displacement sensor 30 and the like, when one component is damaged, only a new corresponding component needs to be replaced, and the whole component does not need to be replaced, so that the maintenance cost is low.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A main pump phase measuring device is characterized by comprising a bracket (10) used for being installed on a main pump, a sleeve (20) arranged on the bracket (10) and perpendicular to the axial direction of a motor shaft of the main pump, and a displacement sensor (30);

the sleeve (20) is provided with a first end (21) and a second end (22) which are opposite to each other, and the displacement sensor (30) is inserted into the first end (21) of the sleeve (20) and is opposite to a convex pin or a key slot on the motor shaft.

2. A main pump phase measuring device according to claim 1, characterized in that said bracket (10) comprises a support tube (11), a fixing plate (13) for fixing to the main pump, a connecting plate (12) connected between said support tube (11) and the fixing plate (13); the fixing plate (13) is provided with at least one fixing hole (131) for a bolt to penetrate through.

3. The main pump phase measuring device of claim 2, wherein the sleeve (20) is inserted into the support tube (11) and is in threaded engagement with the support tube (11); the first end (21) and the second end (22) of the sleeve (20) respectively extend out of the two opposite ends of the support tube (11).

4. The main pump phase measuring device of claim 3, further comprising a lock nut (40) fitted on the second end (22) of the sleeve (20) to fix the sleeve (20) and the support cylinder (11) relatively.

5. The main pump phase measuring device according to claim 1, characterized in that the internal channel of the sleeve (20) comprises a positioning channel (201) located in the first end (21) and adapted to the displacement sensor (30), a cable passage (202) located in the second end (22) and through which a cable for connecting the displacement sensor (30) passes;

the cable passing channel (202) is communicated with the positioning channel (201) in an extending way; the displacement sensor (30) is inserted in the positioning channel (201), and the probe part of the displacement sensor is positioned outside the positioning channel (201) to be opposite to the gap of the convex needle or the key slot on the motor shaft.

6. Main pump phase measurement arrangement according to claim 5, characterized by a threaded fit between the positioning channel (201) and the displacement sensor (30).

7. Main pump phase measuring device according to claim 6, characterized in that said displacement sensor (30) is fitted with a nut (31) for fixing it with respect to said sleeve (20).

8. The main pump phase measurement device of claim 1, wherein the clearance between the displacement sensor (30) and the boss pin or the key groove on the motor shaft is ≤ 1 mm.

9. The main pump phase measurement device according to any one of claims 1-8, further comprising a joint (50) electrically connected to the displacement sensor (30); the adapter (50) is attached to the second end (22) of the sleeve (20).

10. The main pump phase measuring device of claim 9, wherein the second end (22) of the sleeve (20) is peripherally provided with a projecting annular step (23), the annular step (23) being provided with at least one connecting hole (203); the joint (50) is inserted into the second end (22) of the sleeve (20), the limiting bulge on the periphery of the joint (50) is abutted to the annular step (23), and the limiting bulge and the annular step (23) are fixedly connected in a penetrating mode through bolts.