CN116609027B - Pressure measuring rake - Google Patents
Pressure measuring rake Download PDFInfo
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- CN116609027B CN116609027B CN202310863007.5A CN202310863007A CN116609027B CN 116609027 B CN116609027 B CN 116609027B CN 202310863007 A CN202310863007 A CN 202310863007A CN 116609027 B CN116609027 B CN 116609027B
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- 239000000523 sample Substances 0.000 claims abstract description 147
- 230000007704 transition Effects 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 39
- 238000009530 blood pressure measurement Methods 0.000 abstract description 12
- 238000012360 testing method Methods 0.000 abstract description 12
- 230000009286 beneficial effect Effects 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 6
- 238000011900 installation process Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 20
- 230000008569 process Effects 0.000 description 12
- 238000012423 maintenance Methods 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
Abstract
The application relates to the field of aerodynamic test devices, and discloses a pressure measuring rake. The pressure measuring rake comprises a rake body and a probe, wherein the rake body is provided with a mounting hole, the probe is arranged in the mounting hole, the mounting hole is provided with an internal thread section, the probe is provided with an external thread section, and the internal thread section is in threaded connection with the external thread section. According to the application, the internal thread section can play a guiding role in the probe installation process, the probe can be screwed to a preset installation position from the depth direction of the installation hole at a preset installation angle, and the external thread section limits the internal thread section, so that the change of the installation angle of the probe due to vibration can be limited, and the probe installation precision is improved; in the depth direction of the mounting hole, the connecting part between the probe and the mounting hole has a certain length, thereby being beneficial to improving the mounting stability of the probe; in addition, the pressure measurement hose can be fixedly connected with the pressure measurement harrow to form a whole, so that the stability of a pressure measurement pipeline is enhanced, the probe and the harrow body can be detachably arranged, and the probe replacement and inspection can be completed without disassembling the pressure measurement hose.
Description
Technical Field
The application relates to the field of aerodynamic test devices, in particular to a pressure measuring rake.
Background
With the rapid development of aerospace technology, more and more aircrafts with complex appearance and high flight Mach number are generated, and the method has very important strategic significance and very high application value. The air flow resistance of the aircraft is closely related to the overall aerodynamic characteristics of the aircraft, and the accuracy of measurement directly influences the air performance evaluation of the aircraft.
At present, the method for measuring the internal flow resistance of the wind tunnel test determines the internal flow resistance of the ventilation model according to the flow quantity change of the pipe, namely, the flow quantity and the average pressure of the section are measured by arranging a pressure measuring rake near the outlet of the internal flow channel, and then the internal flow resistance is obtained by utilizing formulas such as inlet-outlet difference and the like. The pressure measuring rake mainly comprises a rake body, a probe and a pressure measuring pipe, wherein in the related art, a mounting hole is formed in the rake body, the probe penetrates through the mounting hole, and then the probe is fastened in the mounting hole through a screw. However, due to the fact that an installation gap exists between the probe and the installation hole, the pressure measuring rake under the structural layout is easy to deviate from a preset installation angle in the installation process, and accuracy of test results is affected. Meanwhile, because of airflow disturbance in the pressure measuring process, the probe vibrates in the mounting hole, so that the probe is easy to loosen and has the risk of falling off.
Disclosure of Invention
The application discloses a pressure measuring rake which improves the mounting accuracy of a probe.
In order to solve the problems, the application adopts the following technical scheme:
the application provides a pressure measuring rake which comprises a rake body and a probe, wherein the rake body is provided with a mounting hole, the probe is arranged in the mounting hole, the mounting hole is provided with an internal thread section, the probe is provided with an external thread section, and the internal thread section is in threaded connection with the external thread section.
Further, the probe is at least partially in transition engagement with the mounting hole.
Further, the mounting hole comprises a first hole section and a second hole section which are sequentially arranged along the extending direction of the mounting hole, and the cross section area of the first hole section is larger than that of the second hole section; the probe is provided with a first connecting section and a second connecting section which are sequentially arranged, and the cross section area of the first connecting section is larger than that of the second connecting section; the first connecting section is arranged on the first hole section, and the second connecting section is arranged on the second hole section.
Further, a first step part is arranged at the connection part between the first hole section and the second hole section, a second step part is arranged at the connection part between the first connection section and the second connection section, and a sealing element is arranged between the first step part and the second step part.
Further, the internal thread section is arranged on the second hole section, and the external thread section is arranged on the second connecting section; the first bore section is in transition fit with the first connecting section.
Further, the length of the first hole section is greater than 3 times the maximum width of the cross section of the first hole section, and the length of the second hole section is greater than 6 times the maximum width of the cross section of the second hole section.
Further, the rake body comprises a body and an installation part, wherein the body is detachably connected with the installation part, and the installation hole is formed in the installation part; a cavity is formed in one end, connected with the body, of the mounting part, and the cavity is communicated with the mounting hole; the pressure measuring rake also comprises a pressure measuring pipe, one end of the pressure measuring pipe is arranged in the cavity, and the pressure measuring pipe is communicated with the mounting hole.
Further, the mounting hole further comprises a third hole section, and the third hole Duan Sheyu is communicated with the second hole section and the cavity; the probe is provided with an airflow through hole arranged along the length direction of the probe, and the aperture of the airflow through hole is equal to that of the third hole section.
Further, the pressure measuring pipe comprises a pressure measuring hard pipe and a pressure measuring soft pipe, the pressure measuring hard pipe is fixedly arranged in the cavity and communicated with the third hole section, and the pressure measuring soft pipe is connected with the pressure measuring hard pipe in a sleeved mode.
Further, a transition section is arranged between the third hole section and the second hole section, and the hole diameter of the transition section gradually decreases from the second hole section to the third hole section.
The technical scheme adopted by the application can achieve the following beneficial effects:
1. the internal thread section can play a role in guiding in the process of installing the probe, the probe can be screwed to a preset installation position from the depth direction of the installation hole at a preset installation angle, in the process, the probe is guided by the threads of the internal thread section, and the probe is installed in the installation hole at a preset installation posture, so that deflection of the probe in the installation process is avoided, and the installation precision of the probe is improved;
2. in the depth direction of the mounting hole, the connecting part between the probe and the mounting hole has a certain length, so that the contact area of the connecting part between the probe and the mounting hole is effectively increased, and the mounting stability of the probe is improved;
3. in the length direction of the probe, the external thread section limits the internal thread section, so that the mounting angle of the probe can be limited to change due to vibration, and the vibration resistance of the probe is improved;
4. further, the mounting hole is arranged on the mounting part, and the mounting part is detachably connected with the rake body; under the structural layout, the probe and the pressure measuring pipe are designed in a split type, so that the pressure measuring pipe and the probe can be maintained and replaced in the later period, the later maintenance difficulty is reduced, and the maintenance efficiency is improved; meanwhile, the position of the probe can be adjusted along with the movement of the position of the mounting part, and the position adjustment of the probe is not influenced by the pressure measuring tube because the pressure measuring tube is separated from the probe, so that the change adjustment of the position of the probe is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a rake structure according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a probe structure according to an embodiment of the present application;
fig. 3 is a schematic structural view of a probe mounted on a rake body according to an embodiment of the present application.
In the figure:
100-rake body, 101-first step, 102-transition section, 109-mounting hole, 110-first hole section, 120-second hole section, 121-first straight section, 122-internal thread section, 130-third hole section, 200-probe, 201-second step, 202-airflow through hole, 210-first connection section, 220-second connection section, 221-second straight section, 222-external thread section, 310-pressure hard tube, 320-pressure hose, 400-sealing element.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, based on the examples herein, which are within the scope of the application as defined by the claims, will be within the scope of the application as defined by the claims.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The purpose of the ventilation model test is to obtain full-mode aerodynamic data simulating inlet flow patterns or to obtain internal flow resistance of the ventilation model. In a high-speed wind tunnel, a ventilation model force measurement test usually adopts a tail support rod supporting mode, and a pressure measurement rake is fixedly connected to the tail support rod through a screw.
In the related art, the pressure measuring rake mainly comprises a rake body, a pressure measuring pipe and a probe, one end of the probe captures air flow, the other end of the probe is connected with the pressure measuring pipe, the air flow is transmitted to a pressure acquisition system through the pressure measuring pipe, a single-point total pressure value is measured, and then reasonable interpolation processing is carried out on each single-point total pressure signal, so that an inlet total pressure distortion map can be obtained. The probe penetrates through a mounting hole formed in the rake body, and is fastened in the mounting hole through a screw to realize mounting and fixing of the probe. Under this mounting structure, there is the installation clearance between probe and the mounting hole, and the probe is easily influenced by the clearance in the installation for probe installation angle is different with predetermineeing the installation angle, and then makes static pressure or total pressure that the probe measurement obtained have the deviation with the actual conditions, influences the precision of experimental test data.
In addition, the pressure measurement harrow is at the pressure measurement in-process, and the probe receives the air current influence of its place ahead air current vector direction, owing to there is the clearance between probe and the mounting hole for the probe appears shaking in the mounting hole, leads to the screw loosening, loses fastening effect. And the greater the air pressure of the air flow, the greater the vibration degree of the probe, and the more easily the probe is loosened and falls off.
In view of the above, the application provides a pressure measuring rake which improves the mounting accuracy and the mounting reliability of a probe.
The pressure measuring rake provided by the embodiment of the application is described in detail below by referring to fig. 1 to 3 through specific embodiments and application scenarios thereof.
The embodiment of the application provides a pressure measuring rake, which comprises a rake body 100 and a probe 200.
Referring to fig. 1 and 2, the rake body 100 has a mounting hole 109 extending inward from an outer surface thereof, the probe 200 is disposed in the mounting hole 109, the mounting hole 109 has an internal thread section 122, the probe 200 has an external thread section 222, and the internal thread section 122 is screwed with the external thread section 222.
The rake body 100 serves as a carrying structure for fixedly mounting the probe 200. The mounting holes 109 are provided at the front edge of the rake body 100 on the side facing the air flow so that the probe 200 can collect the incoming air flow. The mounting hole 109 extends from the outer surface of the rake body 100 toward the inner side thereof to form a mounting channel for the probe 200. Of course, when the probe 200 is installed in the mounting hole 109, the probe portion thereof should be located outside the rake 100 to receive the relevant air pressure information. It will be appreciated that the insertion and mounting locations of the probe 200 are matched to the mounting holes 109, and that the probe 200 can be inserted and mounted in the mounting holes 109.
The probe 200 is connected with the mounting hole 109 through the internal thread section 122 and the external thread section 222, and in the depth direction of the mounting hole 109, the connection part between the probe 200 and the mounting hole 109 has a certain length, and compared with the related art, the contact area of the connection part between the probe 200 and the mounting hole 109 is lengthened, so that the connection strength between the probe 200 and the mounting hole 109 is ensured, and the mounting stability of the probe 200 is improved. In the length direction of the probe 200, the external thread section 222 limits the internal thread section 122, so that the installation angle of the probe 200 is kept unchanged, and the change of the installation angle of the probe 200 due to shaking can be limited, thereby ensuring that the probe 200 is always at a preset installation angle. Meanwhile, the internal thread 122 can play a guiding role in the installation process of the probe 200, the probe 200 can be screwed to a preset installation position from the depth direction of the installation hole 109 at a preset installation angle, and in the process, the probe 200 is guided by the threads of the internal thread 122, namely, the probe 200 is installed in the installation hole 109 at a preset installation posture, so that deflection of the probe is avoided in the installation process. Therefore, the embodiment of the application can improve the mounting precision of the probe 200 on the rake body 100, and simultaneously improve the connection stability of the probe 200 and the rake body 100 and the shock resistance of the probe 200 in the pressure measuring process.
In some embodiments, the probe 200 is also threadably mounted and dismounted. For example, when the pressure measuring rake has abnormal conditions such as air leakage, and the like, the measuring rake needs to be disassembled for investigation, the probe 200 can be disassembled from the rake body 100 by twisting the probe 200, which is beneficial to the installation and the disassembly of the probe 200.
In some embodiments of the application, the probe 200 is at least partially transition fitted with the mounting hole 109. That is, only a small gap or mutual contact exists between at least part of the probe 200 and the mounting hole 109, and under the structural layout, the gap space between the probe 200 and the mounting hole 109 is reduced to the minimum on the premise that the probe 200 can be mounted in the mounting hole 109, so that the mounting hole 109 is beneficial to playing a better limiting effect on the probe 200, and further beneficial to keeping the probe 200 at a preset mounting angle.
In some embodiments of the present application, the mounting hole 109 includes a first hole section 110 and a second hole section 120 disposed in sequence along the extension direction thereof, the cross-sectional area of the first hole section 110 being larger than the cross-sectional area of the second hole section 120. The probe 200 has a first connection section 210 and a second connection section 220 arranged in sequence, the cross-sectional area of the first connection section 210 being larger than the cross-sectional area of the second connection section 220. When the probe 200 is mounted in the mounting hole 109, the first connection section 210 is provided in the first hole section 110, and the second connection section 220 is provided in the second hole section 120. Of course, the probe head portion of the probe 200 is located outside the mounting hole 109.
The mounting hole 109 has hole sections of different pore sizes, and the cross-sectional area of the first hole section 110 is larger than that of the second hole section 120, so that a barrier can be formed between the first hole section 110 and the second hole section 120. In the pressure measurement, the baffle can prevent the air flow from entering the second hole section 120 through the first hole section 110, so that the disturbance of the air flow to the second connection section 220 is reduced, the disturbance degree of the second connection section 220 on the air flow received by the second hole section 120 is reduced, the anti-disturbance capability of the probe 200 is improved, and the connection stability between the probe 200 and the mounting hole 109 is effectively ensured. It will be appreciated that the cross-sectional area of the first bore section 110 is greater than the cross-sectional area of the second bore section 120 such that the probe 200 is inserted into the mounting bore 109 from the side of the first bore section 110.
In some embodiments of the present application, the connection portion between the first hole section 110 and the second hole section 120 is a first step portion 101, the connection portion between the first connection section 210 and the second connection section 220 is a second step portion 201, and a sealing member 400 is disposed between the first step portion 101 and the second step portion 201. On the one hand, the sealing member 400 plays a role in sealing, so that air flow can be prevented from entering the second hole section 120, the second connecting section 220 is not affected by the air flow, and connection stability of the second connecting section 220 and the second hole section 120 is guaranteed. On the other hand, the sealing element 400 is arranged between the hole wall of the mounting hole 109 and the outer wall of the probe 200, and can play a role of fixing and supporting between the hole wall of the mounting hole 109 and the outer wall of the probe 200, so that the connection stability of the probe 200 and the rake body 100 is guaranteed, and meanwhile, the probe 200 is kept in a fixed posture at a preset angle, and the test accuracy is improved.
Illustratively, in some embodiments, the seal 400 is a sealing material, and may be a sealant, a gasket, or the like.
In some embodiments of the present application, the internal thread segment 122 is provided on the second bore segment 120 and the external thread segment 222 is provided on the second connection segment 220; wherein the first bore section 110 is transition fitted with the first connection section 210.
The first hole section 110 and the first connecting section 210 are in transition fit, so that the first hole section and the first connecting section are in a close fit state, air flow is limited to enter the mounting hole 109 to the greatest extent, disturbance of the air flow to the probe 200 is reduced, and vibration of the probe 200 is reduced. During the pressure measurement, the airflow generated by the wind tunnel can vibrate the probe part of the probe 200, and as the transition matching part between the probe 200 and the mounting hole 109 is close to the outer surface of the rake body 100, the vibration of the probe part is prevented at the first connecting section 210, so that the connecting part in the mounting hole 109 is not affected by the vibration; meanwhile, under the layout, the first hole section 110 can limit the probe 200 so as to improve the anti-interference capability of the probe part, thereby improving the anti-airflow interference capability of the probe 200.
In the process of installing the probe 200, the second connection section 220 of the probe 200 is firstly placed into the second hole section 120, the second connection section 220 and the second hole section 120 are gradually screwed and fastened along the screw thread, then the first connection section 210 is placed into the first hole section 110, and as the probe 200 rotates, the first connection section 210 is gradually placed into the first hole section 110, and the first connection section 210 is screwed into the first hole section 110 by the screw torsion force, so that the first connection section 210 is finally in transition fit with the first hole section 110. In this process, the first connection section 210 and the first hole section 110 are more easily mounted in a transition fit state by spirally twisting the probe 200, and simultaneously the fastening mounting process of the probe 200 is completed, thereby effectively improving the mounting efficiency and the mounting reliability.
Specifically, in some embodiments of the present application, the internally threaded section 122 is disposed to have a length greater than 0.5 times the length of the second bore section 120. With this structural arrangement, the connection stability of the second connection section 220 and the second hole section 120 is guaranteed, and thus the connection stability of the probe 200 and the rake body 100 is guaranteed.
In some embodiments of the present application, the internally threaded section 122 is disposed on a side of the second bore section 120 remote from the first bore section 110. The internal thread section 122 is far away from the first hole section 110, that is, the connection part of the second connection section 220 and the second hole section 120 is far away from the first hole section 110, so that disturbance of air flow to the connection part is reduced, and connection stability is ensured.
In some embodiments of the application, the length of the first bore section 110 is greater than 3 times the maximum width of the cross section of the first bore section 110 and the length of the second bore section 120 is greater than 6 times the maximum width of the cross section. The maximum width of the cross section refers to the maximum size of the cross section width of the first hole section 110 or the second hole section 120, and if the cross section is circular, the diameter is the maximum width of the cross section. It is understood that the length of the first connecting section 210 and the length of the second connecting section 220 respectively correspond to the length of the first hole section 110 and the length of the second hole section 120. With this structural layout, the connection portion between the probe 200 and the mounting hole 109 has a certain length, so that the contact surface between the probe 200 and the mounting hole 109 is increased, which is beneficial to improving the mounting stability of the probe 200.
Illustratively, the mounting hole 109 is circular in cross-section, the first hole section 110 being greater than 3 times the aperture of the first hole section 110 and the second hole section 120 being greater than 6 times the aperture of the second hole section 120.
In some embodiments of the present application, the rake body 100 includes a body and a mounting portion, the mounting portion is detachably connected to the body, and the mounting hole 109 is provided in the mounting portion; one end of the mounting part connected with the body is provided with a cavity, and the cavity is communicated with the mounting hole 109; the rake also includes a pressure tube, one end of which is located in the cavity, and which communicates with the mounting hole 109.
The probe 200 is mounted to the mounting portion through the mounting hole 109, and the probe 200 and the mounting portion can be separated from the main body as a whole. In the related art, the probe 200 is connected with the pressure measuring tube as an integral structure, and when the pressure measuring rake needs to be overhauled, maintained and replaced, the overhauling, maintenance and replacement of the probe 200 and the pressure measuring tube need to be performed simultaneously. In this process, the probe 200 and the piezometer tube are integrated, so that the maintenance difficulty and the replacement cost are high. The split type design of installation department and body for piezometer tube and probe 200 are split type structure, like this, are convenient for detect respectively to piezometer tube or probe 200, maintenance or change, reduce the later maintenance degree of difficulty, improve maintenance efficiency. When the installation part is detached from the body, the inner cavity of the installation part can be exposed, so that an installation and detachment space is provided for the pressure measuring tube.
Illustratively, the rake body 100 has a plurality of mounting positions for mounting the mounting portions, and the mounting positions of the mounting portions can be adjusted to adjust the setting positions of the probes 200. The cavity may provide an installation space for the pressure tube.
With the mounting portion separated from the body, the pressure tube may be mounted in the cavity with the pressure tube in communication with the mounting hole 109, i.e., with the air flow bore 202 of the probe 200. Therefore, the convenience of mounting the pressure measuring tube can be improved by the cavity.
In some embodiments of the present application, the mounting hole 109 further includes a third hole section 130, the third hole section 130 being disposed between and communicating the second hole section 120 with the cavity; the probe 200 has an air flow hole 202 provided along its length, the aperture of the air flow hole 202 being equal to the aperture of the third hole section 130.
The aperture of the mounting hole 109 is reduced through the third hole section 130, so that the aperture of the third hole section 130 is matched with the aperture of the airflow through hole 202 of the probe 200, and the airflow in the probe 200 can flow into the pressure measuring tube stably, thereby being beneficial to stable signal transmission. Illustratively, the pressure measuring tube is connected to and communicated with the third hole section 130, and in the case that the aperture of the third hole section 130 is smaller, the volume of the pressure measuring tube is correspondingly reduced, which is beneficial to reducing the volume of the pressure measuring tube and reducing the occupied space of the pressure measuring tube.
Specifically, a transition section 102 is disposed between the third hole section 130 and the second hole section 120, and the hole diameter of the transition section 102 gradually decreases from the second hole section 120 to the third hole section 130, so that the second hole section 120 transitions to the third hole section 130 Kong Pingshun, and interference to air flow is reduced.
In some embodiments of the present application, the pressure measuring tube includes a pressure measuring hard tube 310 and a pressure measuring flexible tube 320, wherein the pressure measuring hard tube 310 is fixedly arranged in the cavity and is communicated with the third hole section 130, and the pressure measuring flexible tube 320 is connected with the pressure measuring hard tube 310 in a sleeved mode.
The pressure measuring tube is communicated with the third hole section 130, and can transmit the total pressure signal acquired by the probe 200 to a pressure acquisition system. Wherein, pressure measurement hard tube 310 links to each other with the installation department cavity, realizes with probe 200 air current through-hole intercommunication, is convenient for fix it on the installation department through pressure measurement hard tube 310 for pressure measurement pipe can communicate with mounting hole 109. The flexible pressure measuring hose 320 is more convenient for routing paths, and the pressure measuring hose 320 is convenient for transmitting air pressure signals.
Illustratively, the pressure measuring hard tube 310 is fixedly connected with the rake body 100, and the pressure measuring hose 320 is sleeved on the pressure measuring hard tube 310. Thus, the installation and fixation of the pressure measuring tube are realized, the arrangement of the pressure measuring tube is convenient, the pressure measuring hose 320 is convenient to be taken down from the pressure measuring hard tube 310, and the subsequent investigation and maintenance work is convenient.
In some embodiments, the mounting portion is separated from the body portion of the rake body 100, so that the connection portion between the test hard tube and the test hose is exposed, thereby facilitating the mounting of the test hard tube and the test hose.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application.
Claims (8)
1. The pressure measuring rake is characterized by comprising a rake body (100) and a probe (200), wherein the rake body (100) is provided with a mounting hole (109), the probe (200) is arranged in the mounting hole (109), the mounting hole (109) is provided with an inner threaded section (122), the probe (200) is provided with an outer threaded section (222), and the inner threaded section (122) is in threaded connection with the outer threaded section (222);
the mounting hole (109) comprises a first hole section (110) and a second hole section (120) which are sequentially arranged along the extending direction of the mounting hole, wherein the cross section area of the first hole section (110) is larger than that of the second hole section (120);
the probe (200) is provided with a first connecting section (210) and a second connecting section (220) which are sequentially arranged, wherein the cross-sectional area of the first connecting section (210) is larger than that of the second connecting section (220);
the first connecting section (210) is arranged on the first hole section (110), and the second connecting section (220) is arranged on the second hole section (120);
the internal thread section (122) is arranged on the second hole section, and the external thread section (222) is arranged on the second connecting section (220); the first bore section (110) is in transition fit with the first connection section (210).
2. The pressure rake of claim 1, wherein the probe (200) is at least partially transition fitted to the mounting hole (109).
3. The pressure measuring rake according to claim 1 or 2, characterized in that a connection part between the first hole section (110) and the second hole section (120) is a first step part (101), a connection part between the first connection section (210) and the second connection section (220) is a second step part (201), and a sealing element (400) is arranged between the first step part (101) and the second step part (201).
4. A pressure rake according to claim 1 or 2, characterized in that the length of the first hole section (110) is greater than 3 times the maximum width of the cross section of the first hole section (110), and the length of the second hole section (120) is greater than 6 times the maximum width of the cross section of the second hole section (120).
5. A pressure rake according to claim 1 or 2, characterized in that the rake body (100) comprises a body and a mounting part, the body being detachably connected to the mounting part, and the mounting hole (109) being provided in the mounting part; a cavity is formed in one end, connected with the body, of the mounting part, and the cavity is communicated with the mounting hole (109); the pressure measuring rake further comprises a pressure measuring pipe, one end of the pressure measuring pipe is arranged in the cavity, and the pressure measuring pipe is communicated with the mounting hole (109).
6. The pressure rake of claim 5, characterized in that the mounting hole (109) further comprises a third hole section (130), the third hole section (130) being disposed between and communicating the second hole section (120) with the cavity; the probe (200) has an airflow through hole (202) provided along a length direction thereof, and a hole diameter of the airflow through hole (202) is equal to a hole diameter of the third hole section (130).
7. The pressure rake of claim 6, wherein the pressure measuring tube comprises a pressure measuring hard tube (310) and a pressure measuring hose (320), the pressure measuring hard tube (310) is fixedly arranged in the cavity and is communicated with the third hole section (130), and the pressure measuring hose (320) is sleeved with the pressure measuring hard tube (310).
8. The pressure rake as set forth in claim 6 wherein a transition section (102) is disposed between the third bore section (130) and the second bore section (120), the transition section (102) tapering from the second bore section (120) to the third bore section (130).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310863007.5A CN116609027B (en) | 2023-07-14 | 2023-07-14 | Pressure measuring rake |
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| CN116609027A (en) | 2023-08-18 |
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