Sensor mounting cloth traction device

Abstract

A sensor installation cloth traction device comprises a moving device, the moving device is installed on a rail, the moving device comprises a moving seat, and the moving seat is in sliding fit with the rail; the moving seat is connected with a weight box through a bearing beam, a driving device is installed on the bearing beam and used for driving a driving tooth to move, and the driving tooth is meshed with a rack of the track; and a storage cylinder is mounted on the moving seat and is used for storing sensor mounting cloth. According to the utility model, the sensor mounting cloth can be pulled to move, the sensor mounting cloth can be extended and shortened according to the use length, and the self-adaptive pressing device can automatically adjust the pressing force according to the form of a measured surface, so that the sensor is always kept in good contact with a target surface, and reliable measurement can be realized even on a complicated and uneven surface; and the consistency and accuracy of measurement are improved.

Description

Technical Field

[0001] The utility model belongs to the field of traction devices, in particular to a sensor installation cloth traction device. Background Art

[0002] Cavitation in the gap: the upper end surface of the movable guide vane in the gap forms an upper and lower gap with the top cover, and the lower end surface forms an upper and lower gap with the seat ring; the skirt of the runner blade forms a gap with the inner wall of the runner chamber; the upper and lower leak-proof rings of the runner and the fixed leak-proof ring of the top cover and the fixed leak-proof ring of the seat ring form upper and lower leak-proof ring gaps respectively; high-speed water flows through the above-mentioned gaps, and the flow velocity at the gap outlet where the water flows changes sharply, forming cavitation in the gap, such as cavitation pits formed on the lower end surface of the guide vane and the seat ring surface.

[0003] In the design and operation of large fluid machinery such as turbines, cavitation in the gap is a long-standing technical challenge. Especially for key components such as movable guide vanes, runners and related structures, cavitation problems directly affect the performance, reliability and service life of the equipment. In addition, the gap design between the upper and lower leak-proof rings of the runner and the top cover fixed leak-proof ring and the seat ring fixed leak-proof ring is intended to reduce water leakage, but it also faces cavitation problems. The water flow in the gaps of these leak-proof rings is complex and easy to form vortices and high-pressure areas, which promotes the development of cavitation, affects the leak-proof effect, and reduces the efficiency of the turbine.

[0004] For the monitoring and evaluation of cavitation in the above gap, the current technical means mostly rely on regular shutdown inspection, ultrasonic testing, magnetic particle testing or methods based on vibration signal analysis. These methods are not only cumbersome and costly, but also difficult to achieve real-time, online rapid measurement of cavitation. In response to the above problems, our company is concentrating on developing a device for measuring cavitation in the gap of movable guide vanes, which requires the traction sensor installation cloth to move and also needs to have a telescopic function. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a sensor installation cloth traction device. The utility model can pull the sensor installation cloth to move, and the sensor installation cloth can be extended and shortened according to the use length. The adaptive pressing device automatically adjusts the pressing force according to the shape of the measured surface to ensure that the sensor always maintains good contact with the target surface. Reliable measurement can be achieved even on complex and uneven surfaces, thereby improving the consistency and accuracy of the measurement.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A sensor installation cloth traction device comprises a moving device, which is installed on a track, and the moving device comprises a moving seat, and the moving seat is slidably matched with the track; the moving seat is connected to a counterweight box through a load-bearing beam, and a driving device is installed on the load-bearing beam, and the driving device is used to drive a driving tooth to move, and the driving tooth is meshed with a rack of the track;

[0008] A storage tube is installed on the moving seat, and the storage tube is used for storing the sensor installation cloth.

[0009] Preferably, both ends of the sensor installation cloth are respectively wound in storage rollers, the storage rollers are rotatably installed in the storage cylinder, and the storage rollers are connected to the storage cylinder through a spring, and a strip outlet is provided on the side wall of the storage cylinder, and the sensor installation cloth is used to pass through the strip outlet.

[0010] Preferably, the side wall of the movable seat is provided with a slide groove adapted to the track, and a plurality of pulleys are provided in the slide groove.

[0011] Preferably, the storage cylinder is connected to the adaptive pressing device, which includes a side support, which is connected to the central axis. The central axis is provided with a plurality of rotating arms and disc grooves, each rotating arm corresponds to a disc groove, and the rotating arms are linearly arranged along the axis of the central axis; the disc groove is connected to the rotating arm through a spring, and a pressing wheel is rotatably provided on the outer end of the rotating arm.

[0012] The utility model can achieve the following beneficial effects:

[0013] The utility model can pull the sensor mounting cloth to move, and the sensor mounting cloth can be extended and shortened according to the length of use. The adaptive pressing device automatically adjusts the pressing force according to the shape of the measured surface, ensuring that the sensor always maintains good contact with the target surface. Reliable measurement can be achieved even on complex and uneven surfaces, thereby improving the consistency and accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 This is the three-dimensional structure diagram of the utility model Figure 1 ;

[0016] Figure 2 This is the three-dimensional structure diagram of the utility model Figure 2 ;

[0017] Figure 3 This is a front view of the utility model;

[0018] Figure 4 This is a structural diagram of the connection between the rotating arm, the rotating arm and the mainspring of the utility model.

[0019] In the figure: sensor mounting cloth 2, moving device 3, moving seat 301, load-bearing beam 302, counterweight box 303, driving device 304, driving gear 305, pulley 306, track 4, storage tube 5, strip outlet 6, adaptive pressing device 7, side support 701, central axis 702, rotating arm 703, disc groove 704, pressing wheel 705, spring 9. DETAILED DESCRIPTION

[0020] The preferred solution is Figures 1 to 4 As shown, a sensor installation cloth traction device includes a moving device 3, the moving device 3 is installed on a track 4, the moving device 3 includes a moving seat 301, and the moving seat 301 is slidably matched with the track 4; the moving seat 301 is connected to a counterweight box 303 through a load-bearing beam 302, and a driving device 304 is installed on the load-bearing beam 302, and the driving device 304 is used to drive a driving tooth 305 to move, and the driving tooth 305 is meshed with the rack of the track 4;

[0021] A storage tube 5 is installed on the movable seat 301, and the storage tube 5 is used to store the sensor installation cloth.

[0022] Preferably, both ends of the sensor installation cloth 2 are respectively wound in storage rollers, and the storage rollers are rotatably installed in the storage tube 5, and the storage rollers are connected to the storage tube 5 through a spring. The side wall of the storage tube 5 is provided with a strip outlet 6, and the sensor installation cloth 2 is used to pass through the strip outlet 6.

[0023] The sensor installation cloth is used to install the eddy current sensor 1. The sensor installation cloth 2 is stored in the storage tube 5. The storage roller is connected to the storage tube 5 through a spring, so that the sensor installation cloth 2 has a certain elasticity and can always maintain a certain tension. The driving device 304 is a stepper motor. The power supply unit of the stepper motor can select a lithium battery. The driving module of the stepper motor can be connected to the measurement host through Bluetooth. The number of mobile devices 3 is two, and the two mobile devices 3 are symmetrically installed on the track 4, and the two mobile devices run synchronously. The stepper motor is connected to the driving tooth 305 through a worm gear reducer.

[0024] Preferably, a slide groove adapted to the track 4 is provided on the side wall of the movable seat 301, and a plurality of pulleys 306 are provided in the slide groove.

[0025] The pulley 306 is used to reduce the friction between the moving seat 301 and the track 4 .

[0026] Preferably, the storage tube 5 is connected to the adaptive pressing device 7, which includes a side support 701, and the side support 701 is connected to the central axis 702. The central axis 702 is provided with a plurality of rotating arms 703 and disc grooves 704, each rotating arm 703 corresponds to a disc groove 704, and the rotating arms 703 are linearly arranged along the axis of the central axis 702; the disc groove 704 is connected to the rotating arm 703 through a spring, and the outer end of the rotating arm 703 is rotatably provided with a pressing wheel 705.

[0027] The rotating arms 703 in the adaptive pressing device 7 are used to press down the two ends of the sensor installation cloth 2 to ensure that the sensor installation cloth 2 is in close contact with the end face of the object to be measured. There are several rotating arms 703, and each rotating arm 703 can rotate independently. When the end face of the object to be measured is an irregular curved surface, the corresponding rotating arm 703 will adaptively press down or rotate upward, and combined with the soft characteristics of the sensor installation cloth 2, it can ensure that the sensor installation cloth 2 is in close contact with the end face of the object to be measured.

[0028] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A sensor installation cloth traction device, characterized in that: The mobile device (3) comprises a moving device (3), the moving device (3) is mounted on a track (4), the moving device (3) comprises a moving seat (301), the moving seat (301) and the track (4) are slidably matched; the moving seat (301) is connected to a counterweight box (303) via a load-bearing beam (302), a driving device (304) is mounted on the load-bearing beam (302), the driving device (304) is used to drive a driving tooth (305) to move, and the driving tooth (305) is meshed with a rack of the track (4); A storage cylinder (5) is installed on the movable seat (301), and the storage cylinder (5) is used to store the sensor installation cloth.

2. A sensor installation cloth traction device according to claim 1, characterized in that: The two ends of the sensor installation cloth (2) are respectively wound in a storage roller, the storage roller is rotatably installed in a storage cylinder (5), and the storage roller is connected to the storage cylinder (5) through a spring, and a strip-shaped outlet (6) is provided on the side wall of the storage cylinder (5), and the sensor installation cloth (2) is used to pass through the strip-shaped outlet (6).

3. A sensor installation cloth traction device according to claim 1, characterized in that: A slide groove adapted to the track (4) is provided on the side wall of the movable seat (301), and a plurality of pulleys (306) are provided in the slide groove.

4. A sensor installation cloth traction device according to claim 1, characterized in that: The storage tube (5) is connected to an adaptive pressing device (7), wherein the adaptive pressing device (7) comprises a side support (701), the side support (701) is connected to a central axis (702), a plurality of rotating arms (703) and disc grooves (704) are provided on the central axis (702), each rotating arm (703) corresponds to a disc groove (704), and the rotating arms (703) are arranged linearly along the axis of the central axis (702); the disc groove (704) is connected to the rotating arm (703) via a spring, and a pressing wheel (705) is rotatably provided at the outer end of the rotating arm (703).

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