Nuclear power emergency diesel engine cylinder pressure monitoring device

Abstract

The utility model discloses a nuclear power emergency diesel engine cylinder pressure monitoring device which comprises a switching body and a pressure sensor, the switching body is columnar and is provided with a measuring channel, one end of the switching body is provided with a connecting part used for being connected with a mounting part of a nuclear power emergency diesel engine cylinder, and the other end of the switching body is provided with a pressure sensor. The connecting part is communicated with the measuring channel, the circumferential side face of the switching body is further provided with an installation groove, the installation groove is communicated with the measuring channel, and a measuring probe of the pressure sensor is installed in the installation groove. By arranging the switching body, the pressure of the nuclear power emergency diesel engine cylinder can be led out for measurement, the error between the led-out air pressure and the actual cylinder pressure is not large, and the temperature of the led-out air is greatly reduced, so that the pressure sensor can perform normal and lasting measurement. And the leakproofness of the nuclear power emergency diesel engine cylinder cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a cylinder pressure monitoring device for a nuclear power emergency diesel engine. Background Art

[0002] The station blackout accident poses a hazard to the normal operation of a nuclear power plant. Therefore, during the design of a nuclear power plant, emergency diesel generator sets are provided to cope with the station blackout accident. The cylinder pressure of a diesel engine is an important parameter in the emergency diesel engine condition detection system, mainly used to predict various faults of the upper cylinder of the diesel engine and its main components.

[0003] Currently, on-site pressure monitoring of this nuclear power emergency diesel engine is carried out by temporarily installing a pressure sensor during overhaul to collect pressure for a short time (10 minutes) to observe abnormal conditions of the cylinder. However, due to the excessively high cylinder temperature, the pressure sensor is easily burned out, making it impossible for the pressure sensor to measure the cylinder pressure of this nuclear power emergency diesel engine under the ignition state. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a cylinder pressure monitoring device for a nuclear power emergency diesel engine.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to construct a cylinder pressure monitoring device for a nuclear power emergency diesel engine, including an adapter body and a pressure sensor. The adapter body is columnar, the adapter body has a measurement channel, one end of the adapter body is provided with a connection part for connecting with the installation part of the cylinder of the nuclear power emergency diesel engine, the connection part is communicated with the measurement channel, an installation groove is further provided on the circumferential side surface of the adapter body, the installation groove is communicated with the measurement channel, and the measurement probe of the pressure sensor is installed in the installation groove.

[0006] In some embodiments, the connection part is a connection groove.

[0007] In some embodiments, the inner wall surface of the connection groove is provided with an internal thread surface.

[0008] In some embodiments, the connection groove is coaxially arranged with the measurement channel.

[0009] In some embodiments, the connection part is a connection protrusion; the connection protrusion is columnar.

[0010] In some embodiments, the outer wall surface of the connection protrusion is provided with an external thread surface.

[0011] In some embodiments, the connection protrusion is coaxially arranged with the measurement channel.

[0012] In some embodiments, the adapter body is a metal part.

[0013] In some embodiments, the adapter is an integral structure.

[0014] In some embodiments, the nuclear power emergency diesel engine cylinder pressure monitoring device further includes a local signal acquisition box connected to the pressure sensor.

[0015] Implementing the present utility model has the following beneficial effects: The nuclear power emergency diesel engine cylinder pressure monitoring device includes an adapter and a pressure sensor. The adapter is columnar and has a measurement channel. One end of the adapter is provided with a connection portion for connecting to the installation portion of the nuclear power emergency diesel engine cylinder. The connection portion communicates with the measurement channel. An installation groove is also provided on the circumferential side surface of the adapter, and the installation groove communicates with the measurement channel. The measurement probe of the pressure sensor is installed in the installation groove. By setting the adapter, the pressure of the nuclear power emergency diesel engine cylinder can be led out for measurement, and the error between the led-out air pressure and the actual cylinder pressure is not large. After being led out, the gas temperature drops significantly, enabling the pressure sensor to measure normally and durably. And it will not damage the airtightness of the nuclear power emergency diesel engine cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the present utility model, the present utility model will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the adapter in the first embodiment of the present utility model;

[0018] Figure 2 is a cross-sectional view of the adapter in the first embodiment of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the adapter in the second embodiment of the present utility model;

[0020] Figure 4 is a cross-sectional view of the adapter in the second embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to have a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by terms such as "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings and are constructed and operated in a specific orientation, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0022] It should also be noted that, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. When an element is referred to as being "above" or "below" another element, the element can be "directly" or "indirectly" located above the other element, or there may also be one or more intermediate elements. Terms such as "first", "second", "third", etc. are only for the convenience of describing the present technical solution and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation in order to thoroughly understand the embodiments of the present utility model. However, those skilled in the art should clearly understand that the present utility model can also be implemented in other embodiments without these specific details. In other cases, the detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present utility model.

[0024] First Embodiment:

[0025] Please refer to Figure 1 and Figure 2, the present utility model shows a cylinder pressure monitoring device for a nuclear power emergency diesel engine, which includes an adapter body 10 and a pressure sensor. The adapter body 10 is columnar, and the adapter body 10 has a measurement channel 10a. One end of the adapter body 10 is provided with a connection part for connecting with the installation part of the nuclear power emergency diesel engine cylinder. The connection part is communicated with the measurement channel 10a. An installation groove 11 is also provided on the circumferential side surface of the adapter body 10, and the installation groove 11 is communicated with the measurement channel 10a. The measurement probe of the pressure sensor is installed in the installation groove 11.

[0026] In this embodiment, the installation part of the nuclear power emergency diesel engine cylinder can be a threaded post structure. A reserved hole is provided on the installation part, and the connection part is a connection groove 12. The inner wall surface of the connection groove 12 is provided with an internal thread surface to be threadedly connected with the installation part.

[0027] In this embodiment, the adapter body 10 is a metal part and has certain high-temperature resistance. The adapter body 10 can be made of materials such as stainless steel. Of course, it can also be made of high-temperature-resistant metal materials or non-metal materials, and no specific limitation is made here.

[0028] In this embodiment, the connection groove 11 is coaxially arranged with the measurement channel 10a.

[0029] In this embodiment, the adapter body 10 is an integral structure.

[0030] In this embodiment, the installation groove 11 can be approximately arranged at the middle position of the adapter body 10. Internal threads can be provided in the installation groove 11 to be threadedly connected and fixed with the pressure sensor. The measurement probe of the pressure sensor can extend into the measurement channel 10a. Of course, the size of the adapter body 10, the size (length and inner diameter) of the measurement channel 10a, and the setting position of the installation groove 11 can be selected according to actual needs, and no specific limitation is made here.

[0031] In this embodiment, the cylinder pressure monitoring device for the nuclear power emergency diesel engine further includes a local signal acquisition box connected to the pressure sensor. The pressure of the nuclear power emergency diesel engine cylinder can be collected by the pressure sensor and transmitted to the local signal acquisition box to realize functions such as signal acquisition, centralized processing, display, alarm, data forwarding, and data storage.

[0032] It can be understood that by setting the adapter body 10, the pressure of the nuclear power emergency diesel engine cylinder can be led out for measurement, and the error between the led-out air pressure and the actual cylinder pressure is not large. After being led out, the gas temperature drops significantly (it can be reduced from 800 °C to 300 - 400 °C), enabling the pressure sensor to measure normally and durably. And it will not damage the airtightness of the nuclear power emergency diesel engine cylinder.

[0033] Second embodiment:

[0034] Refer to Figure 3 and Figure 4 Figure 4 , the present utility model shows a cylinder pressure monitoring device for a nuclear power emergency diesel engine, which includes an adapter body 10 and a pressure sensor. The adapter body 10 is columnar and has a measurement channel 10a. One end of the adapter body 10 is provided with a connection part for connecting with the installation part of the nuclear power emergency diesel engine cylinder. The connection part is communicated with the measurement channel 10a. An installation groove 11 is also provided on the circumferential side surface of the adapter body 10, and the installation groove 11 is communicated with the measurement channel 10a. The measurement probe of the pressure sensor is installed in the installation groove 11.

[0035] In this embodiment, the installation part of the nuclear power emergency diesel engine cylinder can be a groove structure, for example, it can be a cylinder indicator valve installation hole, and the connection part is a connection protrusion 13; the connection protrusion 13 is columnar. The outer wall surface of the connection protrusion 13 is provided with an external thread surface to be connected and fixed with the cylinder indicator valve installation hole.

[0036] In this embodiment, the adapter body 10 is a metal part and has certain high-temperature resistance. The adapter body 10 can be made of materials such as stainless steel. Of course, it can also be made of high-temperature-resistant metal materials or non-metal materials, and no specific limitation is made here.

[0037] In this embodiment, the connection protrusion 13 is coaxially arranged with the measurement channel 10a.

[0038] In this embodiment, the adapter body 10 is an integral structure.

[0039] In this embodiment, the installation groove 11 can be generally arranged at the middle position of the adapter body 10. An internal thread can be provided in the installation groove 11 to be threadedly connected and fixed with the pressure sensor, and the measurement probe of the pressure sensor can extend into the measurement channel 10a. Of course, the size of the adapter body 10, the size (length and inner diameter) of the measurement channel 10a, and the setting position of the installation groove 11 can be selected according to actual needs, and no specific limitation is made here.

[0040] In this embodiment, the cylinder pressure monitoring device for the nuclear power emergency diesel engine further includes a local signal acquisition box connected to the pressure sensor. The cylinder pressure of the nuclear power emergency diesel engine can be collected through the pressure sensor and transmitted to the local signal acquisition box to realize functions such as signal acquisition, centralized processing, display, alarm, data forwarding, and data storage.

[0041] Understandably, by setting the adapter 10, the pressure of the cylinder of the nuclear power emergency diesel engine can be led out for measurement, and the error between the led-out air pressure and the actual cylinder pressure is not large. After being led out, the gas temperature drops significantly (it can be reduced from 800 °C to 300 - 400 °C), enabling the pressure sensor to measure normally and durably. Moreover, the airtightness of the cylinder of the nuclear power emergency diesel engine will not be damaged.

[0042] Understandably, the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A nuclear power emergency diesel engine cylinder pressure monitoring device, characterized in that: The adapter body (10) comprises an adapter body (10) and a pressure sensor, wherein the adapter body (10) is columnar and has a measuring channel (10a). One end of the adapter body (10) is provided with a connecting portion for connecting to a mounting portion of a nuclear power emergency diesel engine cylinder, the connecting portion is communicated with the measuring channel (10a), and a mounting groove (11) is further provided on a circumferential side surface of the adapter body (10), the mounting groove (11) is communicated with the measuring channel (10a), and a measuring probe of the pressure sensor is installed in the mounting groove (11).

2. The nuclear power emergency diesel engine cylinder pressure monitoring device according to claim 1 is characterized in that: The connecting portion is a connecting groove (12).

3. The nuclear power emergency diesel engine cylinder pressure monitoring device according to claim 2 is characterized in that: The inner wall surface of the connecting groove (12) is provided with an internal thread surface.

4. The nuclear power emergency diesel engine cylinder pressure monitoring device according to claim 2 is characterized in that: The connecting groove (12) is coaxially arranged with the measuring channel (10a).

5. The nuclear power emergency diesel engine cylinder pressure monitoring device according to claim 1 is characterized in that: The connecting portion is a connecting protrusion (13); the connecting protrusion (13) is columnar.

6. The nuclear power emergency diesel engine cylinder pressure monitoring device according to claim 5 is characterized in that: The outer wall surface of the connecting protrusion (13) is provided with an external thread surface.

7. The nuclear power emergency diesel engine cylinder pressure monitoring device according to claim 5 is characterized in that: The connecting protrusion (13) is coaxially arranged with the measuring channel (10a).

8. The nuclear power emergency diesel engine cylinder pressure monitoring device according to claim 1 is characterized in that: The adapter (10) is a metal part.

9. The nuclear power emergency diesel engine cylinder pressure monitoring device according to claim 1, characterized in that: The adapter (10) is an integrated structure.

10. The nuclear power emergency diesel engine cylinder pressure monitoring device according to claim 1, characterized in that: The nuclear power emergency diesel engine cylinder pressure monitoring device also includes an on-site signal acquisition box connected to the pressure sensor.

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