A gas flow meter detector

Abstract

The present invention discloses a gas flow meter detector, which belongs to the field of detection equipment. The device includes: a support plate, on which a positioning shaft is arranged; an inspection plate, which is embedded in the support plate, and a detection slot is opened on the inspection plate, and a first circuit board and a second circuit board are arranged in the detection slot; a guide device, which includes a first guide rod, a second guide rod and a roller; the first guide rod and the second guide rod are rotatably provided with rollers at one end away from the inspection plate, and the other end of the first guide rod and the other end of the second guide rod are both provided with conductive blocks, and the conductive blocks include a first sliding tooth and a second sliding tooth, and the first sliding tooth and the second sliding tooth are electrically conductive; a detector, which includes a processor, an alarm device and a signal detection device, and the alarm device and the signal detection device are both connected to the processor by signal, and the first circuit board and the second circuit board are both electrically connected to the signal detection device. The present invention can accurately detect the size without manual observation or other auxiliary light sources.

Description

Technical Field

[0001] The invention belongs to the field of detection equipment, and in particular relates to a gas flow meter detector. Background Art

[0002] ISA1932 nozzle flowmeter has the characteristics of high temperature and high pressure resistance, impact resistance, long service life, large measurement range, and measurement accuracy. It is suitable for measuring the flow rate of high-speed fluids in high-temperature and high-pressure steam heating network pipelines in power plants and is widely used. ISA1932 nozzle is an important component of this type of flowmeter. Its cross-sectional structure is as follows Figure 1 As shown, the arc surface on the flared side is an irregular shape, which is formed by two arc surfaces of different diameters being tangent to each other, and its end face is not tangent to R2 in the figure. Due to the particularity of its structure, it is particularly difficult to detect the size of this component.

[0003] In the prior art, when detecting the size of this part, a profiling plate is generally used. Profiling plates are prefabricated for different models. The profiling plates are placed against the inner wall of the hole. The gap between the profiling plate and the inner wall is observed with the naked eye. An auxiliary light source can also be used to observe whether there is light perception, so as to judge whether the size is accurate.

[0004] However, for the profiling board, the board surface will be deformed and twisted during processing and storage. When the board surface is deformed, its size changes, which can easily cause misdetection. In addition, this method is observed by naked eyes, and the judgment standards of different personnel are inconsistent, and the detection accuracy is poor. Although the judgment can be assisted by observing the light with backlight, due to the different sizes and models of nozzles, the larger nozzles are heavier and need to be placed on supports, but the light source cannot be effectively placed at this time. When the size is small, there is a lack of light sources of suitable size for placement, which will result in low detection efficiency. Summary of the invention

[0005] The object of the present invention is to provide a gas flow meter detector, which is used to solve the problems of low efficiency and poor detection accuracy in the prior art when detecting ISA1932 nozzles.

[0006] The technical solution to achieve the purpose of the present invention is:

[0007] A gas flow meter detector is used to detect ISA1932 type nozzles, including:

[0008] A support plate, on which a positioning shaft is arranged;

[0009] An inspection plate is embedded in the support plate, and an inspection slot is provided on the inspection plate, wherein a first circuit board and a second circuit board are arranged in the inspection slot;

[0010] The guide device comprises a first guide rod, a second guide rod and a roller; the first guide rod and the second guide rod are respectively provided with a first guide groove and a second guide groove, the first guide groove and the second guide groove are cross-arranged and both can be slidably arranged on the positioning shaft; the first guide rod and the second guide rod are both rotatably provided with rollers at one end away from the inspection plate, and the other end of the first guide rod and the other end of the second guide rod are both provided with conductive blocks, and the conductive blocks can slide along the detection groove; the conductive blocks each comprise a first sliding tooth and a second sliding tooth, the first sliding tooth and the second sliding tooth are electrically conductive, and the first sliding tooth and the second sliding tooth correspond to the first circuit board and the second circuit board respectively;

[0011] The detector includes a processor, an alarm device and a signal detection device; the alarm device and the signal detection device are both connected to the processor by signals, the first circuit board and the second circuit board are both electrically connected to the signal detection device, and when the first circuit board and the second circuit board are turned on or off, the signal detection device receives the signal and sends it to the processor.

[0012] More preferably, a first give way groove is provided on the first guide rod, and a second give way groove is provided on the second guide rod, and the positions of the first give way groove and the second give way groove correspond to each other; the positions of the first give way groove and the first guide groove correspond to each other, and the positions of the second give way groove and the second guide groove correspond to each other.

[0013] More preferably, it also includes an adjustment device, which includes a pull rod, an adjustment spring and two adjustment sliders, the pull rod is provided with an adjustment slot, the two adjustment sliders can be slidably arranged in the adjustment slot, the adjustment spring is located in the adjustment slot and the two ends of the adjustment spring are respectively fixedly connected to the two adjustment sliders; the two adjustment sliders are respectively fixedly connected to the first guide rod and the second guide rod.

[0014] More preferably, the roller includes a wheel body and a strong magnet, and the strong magnet is embedded in the wheel body.

[0015] More preferably, the roller further comprises two flexible magnets, the two flexible magnets are hemispherical and their open ends are respectively sealed and connected to two sides of the wheel body, and the flexible magnets and the wheel body form a deformation cavity;

[0016] More preferably, the wheel body is provided with two annular sliding grooves, and the first guide rod and the second guide rod are respectively provided with a sliding sleeve at one end away from the inspection plate, the cross section of the sliding sleeve is a C-shaped structure, and the sliding sleeve cooperates with the sliding groove.

[0017] Compared with the prior art, the present invention has the following significant advantages:

[0018] A gas flow meter detector of the present invention has a prefabricated inspection plate that can be conveniently embedded in a support plate, and nozzles of different models can be conveniently replaced with different inspection plates; a signal is generated by conduction between a first circuit board and a second circuit board, and when the size is unqualified, the conductive block is offset, making it impossible for the first circuit board and the second circuit board to be conductive, thereby accurately detecting the size without the need for manual observation or other auxiliary light sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the ISA1932 nozzle in the prior art;

[0020] Figure 2 A schematic diagram of the structure of a gas flow meter detector provided by the present invention;

[0021] Figure 3 for Figure 2 A schematic cross-sectional structure diagram of ;

[0022] Figure 4 for Figure 3 Middle BB section view;

[0023] Figure 5 for Figure 4 A partial enlarged view of point C in the middle;

[0024] Figure 6 for Figure 3 Middle AA section view;

[0025] Figure 7 for Figure 6 A partial enlarged view of point D in the middle;

[0026] Figure 8 A system principle diagram of a gas flow meter detector provided by the present invention.

[0027] Description of reference numerals:

[0028] 00ISA1932 nozzle; 10 support plate; 11 inspection plate; 12 positioning shaft; 13 detection groove; 20 roller; 201 slide groove; 21 sleeve; 22 flexible magnet; 23 deformation chamber; 24 strong magnet; 30 first guide rod; 301 first guide groove; 31 second guide rod; 311 second guide groove; 40 pull rod; 401 adjustment groove; 41 adjustment spring; 42 adjustment slider; 421 first slide tooth; 422 second slide tooth. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Embodiment 1:

[0031] like Figures 2 to 3 As shown, a gas flow meter detector provided by an embodiment of the present invention is used to detect an ISA1932 type nozzle. The detection device includes a support plate 10, a test plate 11, a guide device and a detector.

[0032] A positioning shaft 12 is provided on the support plate 10, and the support plate 10 is used to support the entire device and to install the inspection plate 11; the inspection plate 11 is embedded in the support plate 10, and its structure can adopt the detachable structure in the prior art. A detection groove 13 is opened on the inspection plate 11, and its shape trajectory matches the walking trajectory of the conductive block during the detection, and its trajectory is as follows Figure 2 and Figure 3 As shown (according to the actual size of different nozzles, corresponding tracks are set, and the track shape corresponds to the standard size of the nozzle), a first circuit board and a second circuit board are set in the detection slot 13. The first circuit board and the second circuit board can be set in the form of printed circuits, or can be set in the detection slot 13 by embedding and bonding conductive sheets. The tracks of the first circuit board and the second circuit board are arranged in parallel and are the same as the extended tracks of the detection slot 13;

[0033] The guide device includes a first guide rod 30, a second guide rod 31 and a roller 20, such as Figure 2 As shown, the first guide rod 30 and the second guide rod 31 are respectively provided with a first guide groove 301 and a second guide groove 311, and the first guide groove 301 and the second guide groove 311 are cross-arranged and can be slidably arranged on the positioning shaft 12, that is, the first guide rod 30 and the second guide rod 31 are cross-arranged, and the positioning shaft 12 passes through the first guide groove 301 and the second guide groove 311 at the same time, so that the first guide rod 30 and the second guide rod 31 can slide and rotate under the limiting action of the positioning shaft 12; the first guide rod 30 and the second guide rod 31 are rotatably provided with rollers 20 at one end away from the inspection plate 11, and the rollers 20 are used to fit with the inner surface of the nozzle to move along the inner surface. The surface is rolled to detect the size, the other end of the first guide rod 30 and the other end of the second guide rod 31 are both provided with a conductive block, the conductive block includes a first sliding tooth 421 and a second sliding tooth 422, the first sliding tooth 421 and the second sliding tooth 422 are electrically conductive, the first sliding tooth 421 and the second sliding tooth 422 correspond to the first circuit board and the second circuit board respectively, when the roller 20 is fitted with the inner surface of the nozzle and the size of the inner surface of the nozzle is within the error range, the conductive block corresponds to the position of the first circuit board and the second circuit board, the first sliding tooth 421 is fitted with the first circuit board, and the second sliding tooth 422 is fitted with the second circuit board, so that the first circuit board and the second circuit board are electrically conductive through the conductive block;

[0034] The detector includes a processor, an alarm device and a signal detection device, such as Figure 8As shown, the alarm device and the signal detection device are both connected to the processor, the first circuit board and the second circuit board are both electrically connected to the signal detection device, when the first circuit board and the second circuit board are turned on, the signal detection device generates a first signal and sends it to the processor, when the circuit is turned off, the signal detection device generates a second signal and sends it to the processor, and the processor can judge whether the first circuit board and the second circuit board are in the on or off state according to the type of the first signal and / or the second signal. In this embodiment, the first signal is a current signal when the circuit is turned on, and the second signal is a current signal when the circuit is turned off.

[0035] Specifically, the signal detection device can use components in the prior art that can be used to detect whether a circuit is disconnected, such as current detectors, power-off detection circuits, power-off detectors, power-off alarms, and other existing devices. It is understandable that any instrument that can detect whether a circuit is disconnected and generate a power-off signal can be used, and this embodiment does not make specific limitations.

[0036] During operation, both rollers 20 are attached to the inner surface of the nozzle, and the first guide rod 30 and the second guide rod 31 are pulled so that the rollers 20 always adhere to the inner surface of the nozzle while the conductive block moves along the extension track of the detection slot 13. When the nozzle size is unqualified, the rollers 20 will drive the first guide rod 30 and / or the second guide rod 31 to deflect, thereby causing the conductive block to deviate from the correct track, making it impossible for the conductive block to match the first circuit board and the second circuit board, thereby disconnecting the first circuit board and the second circuit board. At this time, the signal detection device detects a power-off signal and sends it to the processor. The processor controls the alarm device to sound an alarm to prompt the operator of size deviation.

[0037] Embodiment 2:

[0038] When the first guide rod 30 and the second guide rod 31 are stacked, the two rollers 20 will be in an asymmetric state, which will cause errors in the detected dimensions.

[0039] In order to make the two rollers 20 symmetrical along the central axis of the nozzle, based on the first embodiment, in this embodiment, the first guide rod 30 is provided with a first clearance groove, and the second guide rod 31 is provided with a second clearance groove, such as Figure 2 As shown, the positions of the first clearance groove and the second clearance groove correspond to each other; the positions of the first clearance groove and the first guide groove 301 correspond to each other, and the positions of the second clearance groove and the second guide groove 311 correspond to each other. The first clearance groove and the second clearance groove are mutually locked, so that the rollers 20 on the first guide rod 30 and the second guide rod 31 can be symmetrically arranged, thereby improving the detection accuracy.

[0040] Embodiment three:

[0041] In order to facilitate the operation of the first guide rod 30 and the second guide rod 31, based on the first or second embodiment, as shown in FIG. Figure 6 and Figure 7 As shown, in this embodiment, an adjustment device is also included, which includes a pull rod 40, an adjustment spring 41 and two adjustment sliders 42. An adjustment slot 401 is opened on the pull rod 40. Both adjustment sliders 42 can be slidably arranged in the adjustment slot 401. The adjustment spring 41 is located in the adjustment slot 401 and both ends of the adjustment spring 41 are respectively fixedly connected to the two adjustment sliders 42; the two adjustment sliders 42 are respectively fixedly connected to the first guide rod 30 and the second guide rod 31.

[0042] The existence of the adjusting spring 41 enables the adjusting slider 42 to maintain a tendency to move toward both sides, so that the two rollers 20 can maintain contact with the inner wall of the nozzle.

[0043] When in use, just pull the pull rod 40 in the direction away from the nozzle to drive the first guide rod 30 and the second guide rod 31 to move synchronously. When moving to the end close to the inner hole of the nozzle, push the pull rod 40 in the reverse direction to move the two rollers 20 toward both sides.

[0044] Embodiment 4:

[0045] In order to avoid improper operation or too fast operation speed causing the roller 20 to be separated from the nozzle, resulting in misdetection.

[0046] On the basis of the above embodiment, in this embodiment, the roller 20 includes a wheel body and a strong magnet 24, and the strong magnet 24 is embedded in the wheel body. The strong magnet 24 can generate an adsorption force with the nozzle (carbon steel nozzle and some magnetically attractive stainless steel materials), so that the roller 20 can keep in contact with the inner wall of the nozzle to avoid false detection. Among them, the above-mentioned strong magnet 24 refers to "rare earth strong magnet", that is, neodymium iron boron strong magnet.

[0047] Embodiment five:

[0048] Based on the fourth embodiment, since the circumferential surface of the roller 20 cannot be completely fitted with the inner hole of the nozzle (when the circumferential surface of the roller 20 is a plane, it contacts the arc-shaped inner hole at two points and cannot fit; when the circumferential surface of the roller 20 is a convex surface, it cannot match inner holes of different diameters), despite the presence of the strong magnet 24, the suction force is weakened due to the large gap, and there is still a risk of detachment.

[0049] Therefore, in this embodiment, if Figure 4 and Figure 5As shown, the roller 20 also includes two flexible magnets 22, which are hemispherical and have open ends sealed to the two sides of the wheel body, respectively. The flexible magnets 22 and the wheel body form a deformation cavity 23. Since the flexible magnets 22 have the ability to be deformed, when the roller 20 fits the inner wall of the nozzle, the flexible magnets 22 are deformed under the action of the magnetic attraction, deforming toward the inner wall of the nozzle so as to fit the inner wall of the nozzle, thereby increasing the magnetic attraction. During the rotation of the roller 20, the flexible magnets 22 also continue to deform accordingly to maintain a continuous magnetic attraction.

[0050] The connecting shafts of the conventional roller 20 and the first guide rod 30 and / or the second guide rod 31 are generally arranged at the axis centers on both sides of the roller 20. Since the flexible magnets 22 are arranged on both sides of the roller 20, the connecting parts of the roller 20 and the first guide rod 30 or the second guide rod 31 cannot be arranged on both sides (the roller shaft cannot be arranged on the left and right sides as shown in the figure). Therefore, in this embodiment, as shown in FIG. Figure 4 and Figure 5 As shown, two annular slide grooves 201 are provided on the wheel body, and a sleeve 21 is provided at one end of the first guide rod 30 and the second guide rod 31 away from the inspection plate 11. The cross section of the sleeve 21 is a C-shaped structure. The sleeve 21 cooperates with the slide groove 201, so that the roller can rotate relative to the guide rod through this structure. Figure 3 As shown, the overall appearance of the sliding sleeve 21 is a C-shaped structure, and the track it covers is larger than half the circumference of the roller, so that the wheel body will not fall off the sliding sleeve 21.

[0051] Since the roller is rigid, both sides of the roller will press against the curved surface, and the purpose of the flexible magnet is to increase the adsorption force to avoid false detection caused by the roller being separated from the curved surface during the detection process.

[0052] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A gas flow meter detector for detecting ISA1932 type nozzles, characterized in that: include: A support plate (10) on which a positioning shaft (12) is arranged; An inspection plate (11) is embedded in the support plate (10), the inspection plate (11) is provided with an inspection slot (13), and a first circuit board and a second circuit board are arranged in the inspection slot (13); The guide device comprises a first guide rod (30), a second guide rod (31) and a roller (20); the first guide rod (30) and the second guide rod (31) are respectively provided with a first guide groove (301) and a second guide groove (311); the first guide groove (301) and the second guide groove (311) are cross-arranged and both are slidably arranged on the positioning shaft (12); the first guide rod (30) and the second guide rod (31) are both rotatably provided with rollers (20) at one end away from the inspection plate (11) for contacting with the inner surface of the nozzle. The first guide rod (30) and the second guide rod (31) are respectively provided with a conductive block, and the conductive block can slide along the detection slot (13); the conductive blocks each include a first sliding tooth (421) and a second sliding tooth (422), the first sliding tooth (421) and the second sliding tooth (422) are electrically conductive, and the first sliding tooth (421) and the second sliding tooth (422) correspond to the first circuit board and the second circuit board respectively; the roller (20) includes a wheel body and a strong magnet (24), and the strong magnet (24) is embedded in the wheel body; An adjusting device, the adjusting device comprising a pull rod (40), an adjusting spring (41) and two adjusting sliders (42); the pull rod (40) is provided with an adjusting slot (401); the two adjusting sliders (42) are both slidably arranged in the adjusting slot (401); the adjusting spring (41) is located in the adjusting slot (401), and the two ends of the adjusting spring (41) are respectively fixedly connected to the two adjusting sliders (42); the two adjusting sliders (42) are respectively fixedly connected to the first guide rod (30) and the second guide rod (31); The detector includes a processor, an alarm device and a signal detection device; the alarm device and the signal detection device are both connected to the processor by signals, the first circuit board and the second circuit board are both electrically connected to the signal detection device, and when the first circuit board and the second circuit board are turned on or off, the signal detection device receives the signal and sends it to the processor.

2. A gas flow meter detector as claimed in claim 1, characterized in that: The first guide rod (30) is provided with a first give way groove, and the second guide rod (31) is provided with a second give way groove, and the positions of the first give way groove and the second give way groove correspond to each other; the first give way groove corresponds to the position of the first guide groove (301), and the second give way groove corresponds to the position of the second guide groove (311).

3. A gas flow meter detector as claimed in claim 1, characterized in that: The roller (20) further comprises two flexible magnets (22), the two flexible magnets (22) are hemispherical and their open ends are respectively sealed and connected to two sides of the wheel body, and the flexible magnets (22) and the wheel body form a deformation cavity (23).

4. A gas flow meter detector as claimed in claim 1, characterized in that: The wheel body is provided with two annular sliding grooves (201); one end of the first guide rod (30) and the second guide rod (31) away from the inspection plate (11) is respectively provided with a sliding sleeve (21); the cross section of the sliding sleeve (21) is a C-shaped structure; the sliding sleeve (21) cooperates with the sliding groove (201).

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