Air volume measuring device for open ventilation system of nuclear power plant
By designing a flexible air collection sleeve and a measuring duct for air volume measurement in the open ventilation system of a nuclear power plant, the problem of inaccurate air volume measurement caused by structural layout limitations has been solved, achieving higher measurement accuracy and applicability, and meeting the needs of system air volume control and safety monitoring.
Patent Information
- Application Number
- CN202520485676.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-18
AI Technical Summary
In the open ventilation system of nuclear power plants, due to structural layout limitations, the existing air volume measurement devices cannot meet the requirements for straight pipe length, resulting in a decrease in air volume measurement accuracy, causing inaccurate system air volume control, abnormal energy consumption, and failure of safety monitoring.
Design an air volume measuring device comprising a flexible air collection sleeve and a measuring duct. The flexible air collection sleeve is installed on the duct of the open ventilation system of a nuclear power plant through a fixed structure. The measuring duct is provided with an air volume measuring hole, the length and diameter of which conform to a specific range, and is used in conjunction with an anemometer to measure the air volume.
It improves the accuracy and applicability of air volume measurement, reduces measurement space limitations, and can accurately measure air volume in complex structural layouts, meeting the needs of system air volume control and safety monitoring.
Smart Images
Figure CN223870685U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nuclear power technology field especially relates to a nuclear power plant opening ventilation system's air volume measuring device. BACKGROUND
[0002] In the nuclear power plant and industrial plant ventilation system design, the pipeline often exists a large number of reducing, elbow and valve components due to functional demand and space limitation, leading to airflow flow field disorder. The current air volume measurement technology needs to rely on stable flow field environment, requires the upstream straight pipe section of measurement point to be greater than or equal to 5D (D is the pipe diameter or rectangle long side), downstream greater than or equal to 2D, to avoid airflow disturbance interference. However, the structure layout is limited in actual engineering, generally cannot meet the length requirement of straight pipe section, causes the wind speed instrument measurement precision to drop significantly, causes system air volume regulation and control to be inaccurate, energy consumption to be abnormal and safety monitoring to be invalid and other problems. SUMMARY
[0003] The technical problem to be solved by the utility model lies in providing a nuclear power plant opening ventilation system's air volume measuring device to solve the problem of low accuracy of related technology air volume measurement.
[0004] The utility model adopts the technical scheme in the technical problem is solved: a kind of nuclear power plant opening ventilation system's air volume measuring device is structured, including soft wind collecting sleeve and measurement air pipe;
[0005] The first end of the soft wind collecting sleeve is installed on the nuclear power plant opening ventilation system pipeline by fixed structure;
[0006] The measurement air pipe includes pipe body, the first end of the pipe body is connected with the second end of the soft wind collecting sleeve, the second end of the pipe body is equipped with anti-foreign filter screen;Air volume measuring hole is also provided on the pipe body;The length of the pipe body is 580-620cm, the diameter of the pipe body is 70-90cm, and the distance between the air volume measuring hole and the end of the second end of the pipe body is 150-170cm.
[0007] In some embodiments, the fixed structure includes an elastic ring, a first pipe clamp and a second pipe clamp;
[0008] The elastic ring is used to be sleeved on the nuclear power plant opening ventilation system pipeline, the first end of the soft wind collecting sleeve is sleeved on the periphery of the elastic ring, and the first pipe clamp and the second pipe clamp are respectively sleeved on the part of the soft wind collecting sleeve on the two sides of the elastic ring.
[0009] In some embodiments, the fixed structure includes a plurality of binding straps for binding the first end of the soft wind collecting sleeve.
[0010] In some embodiments, the binding strap includes a stainless steel binding strap.
[0011] In some embodiments, the soft wind collecting sleeve is made of at least one of polyester, polypropylene, polyphenylene sulfide, polyimide or polytetrafluoroethylene.
[0012] In some embodiments, the soft wind collecting sleeve is made of at least one of glass fiber, high-silica fiber or basalt fiber.
[0013] In some embodiments, the measuring air pipe is made of aluminum alloy.
[0014] In some embodiments, the measuring air pipe is made of stainless steel.
[0015] In some embodiments, the length of the pipe body is 600 cm, the diameter of the pipe body is 80 cm, and the distance between the air volume measuring hole and the end of the second end of the pipe body is 160 cm.
[0016] In some embodiments, the air volume measuring device of the nuclear power plant open ventilation system further comprises an anemometer installed on the air volume measuring hole.
[0017] The utility model discloses a following beneficial effect: the air volume measuring device of nuclear power plant open ventilation system, including soft wind collecting sleeve and measuring air pipe, the first end of soft wind collecting sleeve is installed on the nuclear power plant open ventilation system pipeline through fixed structure, the measuring air pipe includes the pipe body, the first end of pipe body is connected with the second end of soft wind collecting sleeve, and the second end of pipe body is equipped with the filter screen of preventing foreign matter, still be equipped with air volume measuring hole on the pipe body, the length of pipe body is 580-620cm, the diameter of pipe body is 70-90cm, and the distance between the air volume measuring hole and the end of the second end of the pipe body is 150-170cm. The air volume measuring device of nuclear power plant open ventilation system is better in suitability, can reduce the measurement space limit, and can improve the measurement accuracy. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings and examples, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:
[0019] Figure 1 It is the structure schematic diagram of the air volume measuring device of the nuclear power plant open ventilation system in some embodiments of the utility model;
[0020] Figure 2 It is Figure 1A-A line of the wind volume measuring device of the open ventilation system of the nuclear power plant in the figure is a sectional view along B-B line;
[0021] Figure 3 Figure 2 B-B line of the wind volume measuring device of the open ventilation system of the nuclear power plant in the figure is a sectional view along B-B line;
[0022] Figure 4 It is a structural schematic view of the first pipe clamp or the second pipe clamp in some embodiments of the utility model. DETAILED DESCRIPTION
[0023] In order to have a clearer understanding of the technical features, objects and effects of the utility model, the specific implementation manners of the utility model will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical scheme, and do not indicate that the indicated device or element must have a particular direction, so it cannot be understood as a limitation on the utility model.
[0024] It should be further pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there can be one or more intermediate elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical scheme, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, so the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more features. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0025] In the following description, for the purpose of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
[0026] Referring to Figures 1 to 4 The present application shows a kind of wind volume measuring device of nuclear power plant opening ventilation system, for being connected with nuclear power plant opening ventilation system pipeline 100, to solve the problem that there is no suitable wind volume measuring point due to the existence of elbow pipe (or reducing or the existence of valve throttle component) in the field nuclear power plant opening ventilation system pipeline 100.The nuclear power plant opening ventilation system pipeline 100 includes but is not limited to diesel engine plant ventilation system pipeline.
[0027] The wind volume measuring device of nuclear power plant opening ventilation system includes soft wind collecting sleeve 10 and measuring air pipe 20;The first end of the soft wind collecting sleeve 10 is installed on the nuclear power plant opening ventilation system pipeline 100 by fixed structure 30;The measuring air pipe 20 includes pipe body 21, the first end of the pipe body 21 is connected with the second end of the soft wind collecting sleeve 10, the second end of the pipe body 21 is equipped with anti-foreign filter screen 22, can prevent the influence of measurement by foreign matter, preferably, the pipe body 21 and the soft wind collecting sleeve 10 are integrated structure;The pipe body 21 is also equipped with wind volume measuring hole 211;The length of the pipe body 21 is 580-620cm, the diameter of the pipe body 21 is 70-90cm, the distance between the wind volume measuring hole 211 and the end of the second end of the pipe body 21 is 150-170cm, and stable flow field can be formed in the range of the region from the wind volume measuring hole 211 to the end of the second end of the pipe body 21.
[0028] In the present embodiment, when the output of fan is constant, the wind volume of arbitrary cross section is constant without considering loss, by setting soft wind collecting sleeve 10, it can match the air pipe of arbitrary pipe diameter and shape, and can reduce wind resistance, and airflow is collected and converged in the measuring air pipe 20 (stable region) for wind volume measurement.
[0029] Related technology can only open hole on nuclear power plant opening ventilation system, and select relatively reasonable measurement as far as possible, wind volume measurement error is large, fluctuation is large, is greatly influenced by elbow pipe, valve and other throttles, and does not meet the use conditions of anemometer. While the wind volume measuring device of nuclear power plant opening ventilation system of the present embodiment can more accurately measure system wind volume and wind speed in cooperation with anemometer, to evaluate the output state of fan or meet the temperature or negative pressure requirement of ventilation system room.
[0030] The air volume measuring device of the opening ventilation system of the nuclear power plant has better applicability, can reduce the measurement space limitation, and can improve the measurement accuracy.
[0031] In some embodiments, the fixing structure 30 includes an elastic ring 31, a first pipe clamp 32, and a second pipe clamp 33. The elastic ring 31 is used to be sleeved on the nuclear power plant opening ventilation system pipe 100. The elastic ring 31 can be a gradient density silica gel body. The inside has high density to provide higher friction, and the outside has low density to meet the flexible deformation. The first end of the soft wind collecting sleeve 10 is sleeved on the outer periphery of the elastic ring 31. The first pipe clamp 32 and the second pipe clamp 33 are respectively sleeved on the portions of the soft wind collecting sleeve 10 located on the two sides of the elastic ring 31. After the first end of the soft wind collecting sleeve 10 is sleeved on the outer periphery of the nuclear power plant opening ventilation system pipe 100, the sealing performance is better, external gas is prevented from entering the soft wind collecting sleeve 10 from the gap between the inner side of the soft wind collecting sleeve 10 and the outer side of the nuclear power plant opening ventilation system pipe 100, and the air volume measurement accuracy can be improved.
[0032] In some embodiments, the fixing structure 30 includes a plurality of binding tapes used to bind the first end of the soft wind collecting sleeve 10. The binding tapes can be plasma sprayed to improve the adhesion of the inner wall of the binding tapes. In some embodiments, the binding tapes include stainless steel binding tapes. The stainless steel binding tapes have good stability. Further, the binding tapes can also be binding tapes made of other materials, which are not limited here.
[0033] In some embodiments, the soft wind collecting sleeve 10 is a soft wind collecting sleeve made of at least one material of polyester, polypropylene, polyphenylene sulfide, polyimide, or polytetrafluoroethylene. For example, the soft wind collecting sleeve 10 can be a polyester wind bag, or the soft wind collecting sleeve 10 can be a polypropylene wind bag, or the soft wind collecting sleeve 10 can be a polyphenylene sulfide wind bag, or the soft wind collecting sleeve 10 can be a polyimide wind bag, or the soft wind collecting sleeve 10 can be a polytetrafluoroethylene wind bag.
[0034] The soft wind collecting sleeve 10 can be clamped with aerogel heat insulation sheets to reduce the influence of external temperature on measurement.
[0035] In some embodiments, the soft wind collecting sleeve 10 is a soft wind collecting sleeve made of at least one material of glass fiber, high-silica fiber, or basalt fiber.
[0036] In some embodiments, the measurement air pipe 20 is a measurement air pipe made of aluminum alloy.
[0037] In some embodiments, the measurement air pipe 20 is a measurement air pipe made of stainless steel. Of course, the measurement air pipe 20 can also be made of other metal materials or non-metal materials, which are not limited here.
[0038] In some embodiments, the length of the tube 21 can be 580 cm, 590 cm, 600 cm, 610 cm or 620 cm, the diameter of the tube 21 is 70 cm, 80 cm or 90 cm. The end distance of the air volume measuring hole 211 from the second end of the tube 21 is 150 cm, 160 cm or 170 cm. Preferably, the length of the tube 21 is 600 cm, the diameter of the tube 21 is 80 cm, and the end distance of the air volume measuring hole 211 from the second end of the tube 21 is 160 cm.
[0039] In some embodiments, the air volume measuring device of the nuclear power plant opening ventilation system further comprises an anemometer installed at the air volume measuring hole 211.
[0040] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present application; It should be noted that for ordinary skilled persons in the art, the above technical features can be freely combined without departing from the concept of the present application, and a number of modifications and improvements can be made, which all belong to the protection scope of the present application; Therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.
Claims
1. A device for measuring air volume in an open ventilation system of a nuclear power plant, characterized in that, Includes a flexible air collection sleeve (10) and a measuring air duct (20); The first end of the soft air collecting sleeve (10) is installed on the duct (100) of the open ventilation system of the nuclear power plant through a fixing structure (30); The measuring duct (20) includes a duct body (21), the first end of which is connected to the second end of the soft air collecting sleeve (10), and the second end of the duct body (21) is provided with a foreign object filter (22); the duct body (21) is also provided with an air volume measuring hole (211); the length of the duct body (21) is 580-620cm, the diameter of the duct body (21) is 70-90cm, and the distance between the air volume measuring hole (211) and the end of the second end of the duct body (21) is 150-170cm.
2. The airflow measuring device for an open ventilation system in a nuclear power plant according to claim 1, characterized in that, The fixing structure (30) includes an elastic ring (31), a first clamp (32) and a second clamp (33); The elastic ring (31) is used to be fitted onto the duct (100) of the open ventilation system of the nuclear power plant. The first end of the soft air collecting sleeve (10) is fitted onto the outer periphery of the elastic ring (31). The first pipe clamp (32) and the second pipe clamp (33) are respectively fitted onto the portions of the soft air collecting sleeve (10) located on both sides of the elastic ring (31).
3. The airflow measuring device for an open ventilation system in a nuclear power plant according to claim 1, characterized in that, The fixing structure (30) includes a plurality of straps for securing the first end of the soft air collecting sleeve (10).
4. The airflow measuring device for an open ventilation system in a nuclear power plant according to claim 3, characterized in that, The cable ties include stainless steel cable ties.
5. The air volume measuring device for an open ventilation system in a nuclear power plant according to claim 1, characterized in that, The soft air collecting sleeve (10) is a soft air collecting sleeve made of at least one of polyester, polypropylene, polyphenylene sulfide, polyimide or polytetrafluoroethylene.
6. The air volume measuring device for an open ventilation system in a nuclear power plant according to claim 1, characterized in that, The soft air collecting sleeve (10) is made of at least one of the following materials: glass fiber, high silica fiber, and basalt fiber.
7. The air volume measuring device for an open ventilation system in a nuclear power plant according to claim 1, characterized in that, The measuring duct (20) is a measuring duct made of aluminum alloy.
8. The air volume measuring device for an open ventilation system in a nuclear power plant according to claim 1, characterized in that, The measuring duct (20) is a measuring duct made of stainless steel.
9. The air volume measuring device for an open ventilation system in a nuclear power plant according to claim 1, characterized in that, The length of the pipe (21) is 600cm, the diameter of the pipe (21) is 80cm, and the distance between the air volume measuring hole (211) and the end of the second end of the pipe (21) is 160cm.
10. The airflow measuring device for an open ventilation system in a nuclear power plant according to claim 1, characterized in that, The air volume measuring device of the nuclear power plant open ventilation system also includes an anemometer installed in the air volume measuring hole (211).