Scald-proof structure for primary air measurement
By designing an anti-scalding structure including pipe seats, Bito tube extension rods and multi-stage sleeves, the problems of high-temperature scalding and dispersion of harmful substances in primary wind measurement in thermal power plants are solved, and a safe and efficient testing environment and improvement of accuracy are achieved.
Patent Information
- Application Number
- CN202421600290.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-08
AI Technical Summary
During the primary wind measurement of thermal power plants, testers face the risk of high-temperature scalding, and existing sealing materials are prone to breaking or emit harmful substances, affecting health.
A primary air measurement anti-scalding structure is designed, including a pipe seat, a Bitube tube extension rod, the first and second sleeves, and the high-temperature and high-pressure air flow is gradually slowed down through a multi-stage annular structure and a pressure release hole, and fixed by threaded connections to reduce swing and facilitate cleaning.
Effectively reduce the risk of high-temperature scalding, improve the testing environment, improve the testing accuracy, and reduce the operating burden.
Smart Images
Figure CN223064644U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-temperature and high-pressure hot air measurement and sampling, in particular to an anti-scalding structure for primary air measurement. Background Art
[0002] During the testing process of primary and secondary air in thermal power plants, due to the relatively high air temperature (about 200°C - 380°C), especially the air temperature and air pressure of the primary air are very high (about 4 kPa - 10 kPa), on-site testers have a hard time during the measurement process under the hot state operation of primary and secondary air volumes. In a high-temperature and high-pressure environment, testers will first face the risk of high-temperature scalding. Secondly, during the testing process, in order to block the hot air overflowing from the measurement hole, in the earliest stage, cotton cloth was used for blocking, which was quickly burned, and the water vapor evaporated by using water to cool caused greater harm to the testers. Later, asbestos cloth with high temperature resistance was used for blocking, but the asbestos cloth was very easy to break, and the fragments were scattered into the air along with the hot air, causing irritation to the human skin and irreversible harm to the lungs. Summary of the Utility Model
[0003] In this part, as well as in the abstract and title of the specification of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.
[0004] In view of the above problems existing in the above or prior art, the present utility model is proposed.
[0005] Therefore, the purpose of the present utility model is to provide an anti-scalding structure for primary air measurement.
[0006] To solve the above technical problems, the present utility model provides the following technical solution: an anti-scalding structure for primary air measurement, which includes a primary air duct;
[0007] An extension component, including a pipe seat provided on the outer wall of the primary air duct, a Pitot tube extension rod provided inside the pipe seat, a first sleeve sleeved on the outer wall of the pipe seat, and a ventilation port provided on the outer wall of the first sleeve.
[0008] As a preferred scheme of the anti-scalding structure for primary air measurement of the present utility model, wherein: the inner wall of the first sleeve is provided with a first thread, the outer wall of the first sleeve is provided with a second thread, and the outer wall of the pipe seat is provided with a second thread.
[0009] As a preferred scheme of the anti-scalding structure for primary air measurement of the present utility model, wherein: the inner wall of the first sleeve is provided with a first frustum of a cone, the end face of the first frustum of a cone is provided with a first groove, and the other end face of the first frustum of a cone is provided with a first arc surface.
[0010] As a preferred embodiment of the primary air measurement anti-scalding structure of the present utility model, the following is provided: A plurality of ventilation openings are arranged in an array, the ventilation openings communicate with the interior of the first sleeve, and the ventilation openings are inclined through holes.
[0011] As a preferred embodiment of the primary air measurement anti-scalding structure of the present utility model, the following is provided: A second sleeve is provided on the outer wall of the pipe seat, a first thread is provided on the inner wall of the second sleeve, and a second thread is provided on the outer wall of the second sleeve.
[0012] As a preferred embodiment of the primary air measurement anti-scalding structure of the present utility model, the following is provided: A second frustum is provided on the inner wall of the second sleeve, a second groove is provided on the end face of the second frustum, and a second arc surface is provided on the other end face of the second frustum.
[0013] As a preferred embodiment of the primary air measurement anti-scalding structure of the present utility model, the following is provided: A sealing cover is provided on the outer wall of the second thread, and a first thread is provided on the inner wall of the sealing cover.
[0014] Beneficial effects of the present utility model: The present utility model utilizes the hollow gap in the middle, in combination with a multi-stage annular structure and pressure relief holes, to gradually slow down the high-temperature and high-pressure air flow overflowing from the air duct. This can not only greatly reduce the risk of high-temperature scalding, but also effectively improve the test environment. At the same time, this device with multi-stage series connection is fixed at the pipe seat using threads. The pitot tube can effectively reduce the swinging angle and improve the test accuracy. This device is also convenient for disassembling and cleaning the internal dust, greatly reducing the operation burden of the test personnel. Description of the Drawings
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:
[0016] Figure 1 It is an overall external view of the primary air measurement anti-scalding structure.
[0017] Figure 2 It is an overall cross-sectional schematic diagram of the primary air measurement anti-scalding structure.
[0018] Figure 3 It is for the Figure 2 Enlarged view of the structure in area B of the primary air measurement anti-scalding structure.
[0019] Figure 4 It is for the Figure 3 Enlarged view of the structure in area C of the primary air measurement anti-scalding structure.
[0020] Figure 5Schematic diagram of the Pitot tube extension rod and the external structure of the primary air measurement anti-scald structure.
[0021] Figure 6 Schematic diagram of the cooperation of the first sleeve, the second sleeve and the cover of the primary air measurement anti-scald structure.
[0022] Figure 7 Schematic sectional view of the first sleeve and the second sleeve of the primary air measurement anti-scald structure. Detailed implementation manners
[0023] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings of the specification.
[0024] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar promotions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0025] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present utility model. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it a separate or selectively exclusive embodiment from other embodiments.
[0026] Embodiment 1
[0027] Refer to Figures 1 to 3 , which is the first embodiment of the present utility model. This embodiment provides a primary air measurement anti-scald structure, which includes a primary air duct A;
[0028] An extension assembly 100, including a pipe seat 101 provided in the primary air duct A, a Pitot tube extension rod 102 inside the pipe seat 101, a first sleeve 103 sleeved on the outer wall of the pipe seat 101, and a ventilation port 103a provided on the outer wall of the first sleeve 103.
[0029] Among them, the outer wall of the primary air duct A is wrapped with a heat insulation layer; the pipe seat 101 is a cylinder, the pipe seat 101 passes through the inside of the heat insulation layer, is welded to the wall of the primary air duct and communicates with the primary air duct; the Pitot tube extension rod 102 extends into the inside of the primary air duct through the pipe seat 101, and a Pitot tube for detection is installed at one end of the Pitot tube extension rod 102 extending into the inside of the primary air duct; a plurality of first sleeves 103 are installed on the outer wall of the pipe seat 101 to extend the length of the pipe seat 101. During operation, high-temperature gas flows out from the pipe seat 101 and flows to the outside through the ventilation openings 103a on the outer wall of each first sleeve 103, continuously weakening the hot air flow and reducing the harm to the operators; at the same time, the lengthened pipe seat 101 can also support the Pitot tube extension rod 102.
[0030] In summary, a plurality of first sleeves 103 can be connected in series on the outer wall of the pipe seat 101 to increase the number of ventilation openings 103a, and at the same time, the flow path of the hot air can also be increased. The hot air always flows inside the first sleeve 103 and continuously flows to the outside along the ventilation openings 103a, reducing the amount of hot air flowing to the last first sleeve 103 and ensuring a safe working environment for the operators.
[0031] Embodiment 2
[0032] Refer to Figures 1 to 4 , which is the second embodiment of the present invention. The difference from the first embodiment is that it further includes. In the previous embodiment, the primary air measurement anti-scald structure includes a first thread 103b provided on the inner wall of the first sleeve 103, a second thread 103c provided on the outer wall of the first sleeve 103, and a second thread 103c provided on the outer wall of the pipe seat 101.
[0033] Among them, the first thread 103b on the inner wall of the first sleeve 103 and the second thread 103c on the outer wall of the first sleeve 103 can be meshed and connected. There is a second thread 103c on the outer wall of the pipe seat 101, and the first thread 103b on the inner wall of the first sleeve 103 is meshed with the second thread 103c on the outer wall of the pipe seat 101, thereby screwing the first sleeve 103 onto the outer wall of the pipe seat 101; the other end of the first sleeve 103 can be screwed to the next first sleeve 103. In this way, by screwing, several first sleeves 103 can be installed according to the actual situation to ensure the safety of the working environment of the operators.
[0034] The inner wall of the first sleeve 103 is provided with a first frustum 103d, the end face of the first frustum 103d is provided with a first groove 103e, and the other end face of the first frustum 103d is provided with a first arc surface 103f.
[0035] Among them, a first frustum 103d is fixedly installed on the inner wall of the first sleeve 103. The inner diameter of the first frustum 103 is larger than the outer diameter of the Pitot tube extension rod 102. There is a first groove 103e on the lower surface of the first frustum 103d. This first groove 103e is a groove that is annular and opens towards the primary air duct. The upper surface of the first frustum 103d is an arc-shaped first arc surface 103f, and the first arc surface 103f spreads towards the ventilation opening 103a and escapes from the ventilation opening 103a. When the hot air flows along the first sleeve 103, when the air flow impacts the first groove 103e, due to the increase in space, the impact force of the overall air flow is reduced. At the same time, the remaining air flow will also flow along the gap between the first frustum 103e and the Pitot tube extension rod 102 towards the first arc surface 103f. The air flow diffuses outwards. Part of it flows away along the gap between the next first frustum 103d and the Pitot tube extension rod 102, and part enters the next first groove 103e, forming a countercurrent with the continuously incoming air flow. The hot air is squeezed towards the ventilation opening 103a, and part of the hot air flow slowly flows out from the ventilation opening 103a, and no rapid air flow is formed.
[0036] A plurality of ventilation openings 103a are arranged in an array. The ventilation openings 103a communicate with the inside of the first sleeve 103, and the ventilation openings 103a are inclined through holes.
[0037] Among them, the air outlet direction of the ventilation opening 103a is towards the direction of the primary air duct A, which is opposite to the direction of the operator, ensuring that the operator will not directly contact the hot air, and allowing the hot air to diffuse in the air and cool down.
[0038] A second sleeve 104 is provided on the outer wall of the pipe socket 101. A first thread 103b is provided on the inner wall of the second sleeve 104, and a second thread 103c is provided on the outer wall of the second sleeve 104.
[0039] A second frustum 104a is provided on the inner wall of the second sleeve 104. A second groove 104b is provided on the end face of the second frustum 104a, and a second arc surface 104c is provided on the other end face of the second frustum 104a.
[0040] Among them, a second sleeve 104 is screwed on the outer wall of the pipe socket 101. The difference between the second sleeve 104 and the first sleeve 103 is that there is no ventilation opening 103a. When the hot air reaches the second groove 104b, due to the absence of the ventilation opening 103a, the hot air surges back and forms a countercurrent with the incoming gas, forming a turbulent flow at the second groove 104b. At this time, the gas flow velocity in the gap between the second frustum 104a and the Pitot tube extension rod 102 is accelerated. The main function of this second sleeve 104 is to limit the speed of the hot air, such as Figure 4, in the figure, the black arrow indicates the air flow guiding direction. In the case where the second sleeve 104 has no vent 103a, gas will accumulate here, slowing down the air flow speed. Then, when it enters the interior of the first sleeve 103, the air flow speed of the hot air going out from the vent 103a will be greatly reduced.
[0041] In summary, when starting to measure the speed, the hot air will first pass through the second sleeve 104 for speed limiting, and then enter the first sleeve 103 to release the hot air flow. Through the release of the hot air flow by multiple first sleeves 103, the hot air flow towards the operator is continuously reduced, ensuring the safety of the operator's working environment.
[0042] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible on the premise of substantially not deviating from the novel teachings and advantages of the subject matter described in this application (for example, the dimensions, scales, structures, shapes, and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, color, orientation changes, etc.). For example, an element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature, number, or position of discrete elements can be changed or altered. Therefore, all such modifications are intended to be included within the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structure that performs the recited function herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present utility model. Therefore, the present utility model is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.
[0043] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently considered best mode of implementing the present utility model, or those features that are not relevant to implementing the present utility model).
[0044] It should be understood that in the development process of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without excessive experimentation, such development efforts will be a routine task of design, manufacturing, and production.
[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.
Claims
1. A primary air measurement anti-scalding structure, characterized in that: Comprising a primary air duct (A); An extension component (100), including a pipe socket (101) provided on the outer wall of the primary air duct (A), a Pitot tube extension rod (102) provided inside the pipe socket (101), a first sleeve (103) sleeved on the outer wall of the pipe socket (101), and a ventilation opening (103a) provided on the outer wall of the first sleeve (103).
2. The primary air measurement anti-scalding structure according to claim 1, characterized in that: The inner wall of the first sleeve (103) is provided with a first thread (103b), the outer wall of the first sleeve (103) is provided with a second thread (103c), and the outer wall of the pipe socket (101) is provided with a second thread (103c).
3. The primary air measurement anti-scalding structure according to claim 2, characterized in that: The inner wall of the first sleeve (103) is provided with a first frustum (103d), the end face of the first frustum (103d) is provided with a first groove (103e), and the other end face of the first frustum (103d) is provided with a first arc surface (103f).
4. The primary air measurement anti-scalding structure according to claim 3, characterized in that: A plurality of the ventilation openings (103a) are arranged in an array, and the ventilation openings (103a) communicate with the inside of the first sleeve (103).
5. The primary air measurement anti-scalding structure according to claim 4, characterized in that: The outer wall of the pipe socket (101) is provided with a second sleeve (104), the inner wall of the second sleeve (104) is provided with a first thread (103b), and the outer wall of the second sleeve (104) is provided with a second thread (103c).
6. The primary air measurement anti-scalding structure according to claim 5, characterized in that: The inner wall of the second sleeve (104) is provided with a second frustum (104a), the end face of the second frustum (104a) is provided with a second groove (104b), and the other end face of the second frustum (104a) is provided with a second arc surface (104c).
7. The primary air measurement anti-scalding structure according to claim 4, characterized in that: The ventilation opening (103a) is an inclined through hole.
8. The primary air measurement anti-scalding structure according to claim 6, characterized in that: The opening of the second groove (104b) faces the primary air duct (A).