Online detection device for pressure sensor of acoustic Doppler current profiler

Abstract

The utility model relates to the technical field of acoustic Doppler flow velocity profiler detection, and discloses an acoustic Doppler flow velocity profiler pressure sensor online detection device, which comprises a main frame, a pulley component and a cross beam component, the main frame is formed by welding square tubes, the two square tubes arranged in parallel at the bottom serve as supporting guide rails of the tackle component, the two vertical guide rails are symmetrically arranged on the two sides of the main frame, the cross beam component is arranged between the two vertical guide rails, and the main frame, the tackle component and the cross beam component are combined. The pressure sensor on-line detection equipment is low in cost, simple in operation and compatible with acoustic Doppler flow velocity profilers of various specifications, three notches are formed in the side portion of a vertical guide rail so that a cross beam component can have a high-middle-low fixing position, and three notches are formed in a guide column so that a clamping assembly can have a high-middle-low fixing position. And meanwhile, by virtue of the length of the screw rod, the device can be adapted to acoustic Doppler flow velocity profiler in three height ranges.

Description

Technical Field

[0001] The utility model relates to the technical field of acoustic Doppler flow profiler detection, in particular to an acoustic Doppler flow profiler pressure sensor online detection device. Background Art

[0002] An acoustic Doppler current profiler (ADCP) uses an acoustic transducer to transmit a fixed-frequency sound pulse. Upon striking scatterers in the water, the pulse is backscattered and produces a Doppler frequency shift. The transducer receives the frequency-shifted pulse and interprets it to determine the flow velocity at the corresponding point. The degree of frequency shift is determined by the speed of sound. The speed of sound in seawater is primarily affected by temperature and pressure. Therefore, the ADCP is equipped with temperature and pressure sensors to detect ambient temperature and pressure to determine the sound velocity of the environment surrounding the ADCP. During factory inspection of the ADCP, the pressure sensor functionality must be verified by applying a certain pressure and observing the pressure response of the ADCP host computer. This typically requires placing the ADCP in a pressure tank for pressurization and routing the ADCP cable from the tank. Renting a large, dedicated pressure tank is cumbersome, consumes large amounts of water for testing, and takes a long time to raise and lower the pressure, resulting in high testing costs. In light of these issues, in-depth research has been conducted, leading to this project. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides an online detection device for the pressure sensor of an acoustic Doppler flow profiler, which solves the problems faced by the existing technology in the detection of pressure sensors of various specifications of ADCP at the factory, such as the need for large pressure tanks, cumbersome operation and high testing costs.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: an online detection device for an acoustic Doppler flow profiler pressure sensor, comprising a main frame, a pulley component and a crossbeam component;

[0005] The main frame is welded from square tubes, and two parallel square tubes at the bottom serve as support rails for the pulley component. Two vertical guide rails are symmetrically arranged on both sides of the main frame. The crossbeam component is placed between the two vertical guide rails. The stop block is installed on the front side of the bottom of the main frame, and the limit block is installed on the rear side of the bottom of the main frame.

[0006] The pulley assembly includes a pulley frame welded from square tubes and steel plates, three pairs of track wheels are provided on both sides of the bottom of the pulley frame at the front, middle and rear positions respectively, two guide posts are mounted on the pulley frame with the aid of conical seats, a handle is provided on the top of the pulley frame, a clamping assembly is provided on the two guide posts, a stop hook is installed at the bottom of the pulley frame, and two locking pins of the clamping assembly are respectively inserted into notches provided on the side walls of the guide posts;

[0007] The crossbeam component includes a crossbeam welded from steel plates, a screw sleeve is installed in the middle lower part of the crossbeam, a screw rod is spirally installed in the screw sleeve, a pressing head is installed at the lower part of the screw rod, a sealing groove is provided on the lower end surface of the pressing head, a sealing ring is installed inside the sealing groove, a hydraulic joint is installed on the rear side of the pressing head, a hand wheel is installed on the upper end of the screw rod, and a card limit assembly is provided on the crossbeam, one end of the card limit assembly is inserted into the notch opened on the side of the vertical guide rail.

[0008] The above-mentioned clamping assembly includes two clamping frames that are arranged opposite to each other and fixed to each other. The wedge block is installed in the groove in the middle of the two clamping frames. The four clamping arms are combined in pairs to form a combined clamping arm and are symmetrically arranged between the clamping frames. The front end of the wedge block is equipped with a clamping plate and the rear end is equipped with a screw push plate. The nut block is installed in the middle of the rear part of the two clamping frames. A limiting screw is installed in the middle of the nut block. The front end of the limiting screw is inserted into the screw push plate and fixed with a shaft retaining ring. The rear end of the limiting screw is equipped with a clamping hand wheel. The rear part of the clamping frame is provided with a locking limiting assembly, and one end of the locking limiting assembly is inserted into the notch opened on the side wall of the guide column.

[0009] The clamping front end of the above-mentioned combined clamp arm is equipped with two rubber wheels and a spacer sleeve. The hole in the middle of the combined clamp arm is connected to a spacer sleeve and hinged to the clamping frame plate. The rear end of the combined clamp arm is equipped with a steel wheel. The rear middle section of the combined clamp arm is equipped with a spring fixing pin. The tension spring passes through the long hole in the middle of the wedge block and the two ends are respectively hooked on the spring fixing pin.

[0010] The above-mentioned locking limit assembly includes a guide sleeve arranged on both sides of the rear part of the two clamping frame plates, and two locking pin brackets are installed on the outer side wall of the clamping frame plate located above. A locking pin is hinged on each locking pin bracket, and the two locking pins are connected by a grip rod. A double-bent handle is installed on the outer side wall of the clamping frame plate on the same side of the grip rod.

[0011] The lower part of the screw is equipped with a deep groove ball bearing, the outer ring of the deep groove ball bearing is installed on the transition sleeve, the transition sleeve is clamped on the screw by a retaining ring, the lower part of the transition sleeve is threadedly connected to the pressure head, and a thrust ball bearing is provided inside the transition sleeve between the pressure head and the screw.

[0012] The above-mentioned card limit assembly includes a middle sleeve arranged in the middle position of the upper end surface of the beam, a top fork is provided on the outside of the middle sleeve, the pressure handle is hinged to the bracket on the front side of the beam through the middle hole, the waist-shaped hole on the upper end of the pressure handle is connected to the top fork, the upper surfaces of both sides of the top fork are symmetrically hinged with connecting rods, and the other end of the connecting rod is hinged to the lock tongue, and the lock tongue is restricted on the beam by the short lock tongue pressure block and the long lock tongue pressure block. The elastic indexing pin is connected to the short lock tongue pressure block by a thread, and guide shoe seats are symmetrically installed at both ends of the beam, and the guide shoe seats are equipped with guide shoe liners.

[0013] The utility model provides an online detection device for an acoustic Doppler current profiler pressure sensor. The device, comprising a main frame, a pulley assembly, and a crossbeam assembly, provides a low-cost, simple-to-operate, and compatible device for online detection of pressure sensors for acoustic Doppler current profilers of various specifications. Three notches are provided on the side of the vertical guide rail, allowing the crossbeam assembly to be positioned in three fixed positions: high, medium, and low. Three notches are provided on the guide column, allowing the clamping assembly to be positioned in three fixed positions. The length of the screw allows the device to accommodate acoustic Doppler current profilers (ADCPs) of three different heights. The self-centering clamping assembly accommodates different ADCP barrel diameters. Therefore, the device is capable of online detection of pressure sensors for various ADCPs. The device features a compact structure and convenient operation, resolving the issues of traditional online detection of acoustic Doppler current profilers, which require the rental of large, dedicated pressure tanks, resulting in cumbersome operation, high water consumption, time-consuming pressure increase and decrease, and high testing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of an online detection device for an acoustic Doppler flow profiler pressure sensor.

[0015] Figure 2 This is a side structural schematic diagram of an online detection device for an acoustic Doppler flow profiler pressure sensor according to the present invention.

[0016] Figure 3 This is a schematic diagram of the axonometric structure of the pulley component of the present invention.

[0017] Figure 4 For this utility model Figure 3 Schematic diagram of the main structure.

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamping assembly of the present invention.

[0019] Figure 6 It is a schematic diagram of a top cross-sectional structure of the clamping assembly of the present invention.

[0020] Figure 7 This is a schematic diagram of the axonometric structure of the crossbeam component of the present invention.

[0021] Figure 8 This is a schematic diagram of the main structure of the crossbeam component of the present invention.

[0022] Figure 9 This is a schematic diagram of the structure of the acoustic Doppler flow profiler to be measured when it is of medium size.

[0023] Figure 10This is a schematic diagram of the structure of the acoustic Doppler flow profiler to be measured when it is of small size.

[0024] In the figure: 1, main frame; 2, pulley component; 3, crossbeam component; 4, vertical guide rail; 5, stop block; 6, limit block; 2a, pulley frame; 2b, clamping assembly; 2c, conical seat; 2d, guide column 2e, track wheel; 2f, stop hook; 2g, handle; 2b1, clamping frame plate; 2b2, wedge block; 2b3, combined clamping arm; 2b4, spacer sleeve; 2b5, rubber wheel; 2b6, grip rod; 2b7, lock pin; 2b8, lock pin bracket; 2b9, guide sleeve; 2b10, limit screw; 2b11, clamping hand wheel; 2b12, double bend handle; 2 b13, splint; 2b14, nut block; 2b15, screw push plate; 2b16, steel wheel; 2b17, tension spring; 2b18, spring fixing pin; 3a, crossbeam; 3b, long lock tongue pressure block; 3c, lock tongue; 3d, elastic indexing pin; 3e, hand wheel; 3f, screw; 3g, middle sleeve; 3h, guide shoe bushing; 3i, guide shoe seat; 3j, screw sleeve; 3k, hydraulic joint; 3l, pressure head; 3m, transition sleeve; 3n, pressure handle; 3o, top fork; 3p, connecting rod; 3q, short lock tongue pressure block; 3r, sealing ring; 3s, deep groove ball bearing; 3t, thrust ball bearing. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example: In conjunction with the specification Figure 1-10It can be seen that the present application specifically designs an acoustic Doppler flow profiler pressure sensor online detection device, comprising a main frame 1, a pulley component 2 and a crossbeam component 3; the main frame 1 is welded from square tubes and two parallel square tubes are arranged at the bottom as support guide rails for the pulley component 2, two vertical guide rails 4 are symmetrically arranged on both sides of the main frame 1, the crossbeam component 3 is placed between the two vertical guide rails 4, a stop block 5 is installed on the front side of the bottom of the main frame 1, and a limit block 6 is installed on the rear side of the bottom of the main frame 1; the pulley component 2 includes a pulley frame 2a welded from square tubes and steel plates, and the two sides of the bottom of the pulley frame 2a are at the front and rear sides. Three pairs of track wheels 2e are respectively provided at the front, middle and rear positions; two guide columns 2d are mounted on the pulley frame 2a with the help of a conical seat 2c; a handle 2g is provided at the top of the pulley frame 2a; a clamping assembly 2b is provided on the two guide columns 2d; a stop hook 2f is installed at the bottom of the pulley frame 2a; two locking pins of the clamping assembly 2b are respectively inserted into the notches opened on the side walls of the guide columns 2d; the crossbeam component 3 includes a crossbeam 3a welded by steel plates; a screw sleeve 3j is provided at the middle lower part of the crossbeam 3a; a screw rod 3f is spirally installed in the screw sleeve 3j; a pressing head 3l is installed at the lower part of the screw rod 3f; a sealing member is provided at the lower end face of the pressing head 3l Groove, a sealing ring 3r is installed inside the sealing groove, a hydraulic joint 3k is installed on the side of the rear of the pressure head 3l, a hand wheel 3e is installed on the upper end of the screw 3f, and a card limit assembly is provided on the crossbeam 3a. One end of the card limit assembly is inserted into the notch opened on the side of the vertical guide rail 4. The acoustic Doppler flow profiler pressure sensor online detection device is designed with a combination of a main frame, a pulley component and a crossbeam component to provide a low-cost, simple-to-operate, and compatible with various specifications of acoustic Doppler flow profiler pressure sensor online detection equipment. Three notches are opened on the side of the vertical guide rail to enable the crossbeam component to have three fixed positions of high, medium and low. The guide column has three notches to allow the clamping assembly to have three fixed positions: high, medium and low. At the same time, with the help of the length of the screw, it can adapt to three height ranges of Acoustic Doppler Current Profilers (ADCP). The self-centering clamping assembly can adapt to different barrel outer diameters of ADCP. Therefore, the device can meet the online detection of pressure sensors of various specifications of ADCP. It has a compact structure and easy operation, which solves the problems of traditional Acoustic Doppler Current Profiler pressure sensor online detection, which requires renting a large dedicated pressure tank, cumbersome operation, large test water consumption, long time-consuming pressure increase and decrease, and high test cost.

[0027] In the specific implementation process, the above-mentioned clamping assembly 2b includes two clamping frame plates 2b1 arranged oppositely and fixed to each other, the wedge block 2b2 is installed in the groove in the middle of the two clamping frame plates 2b1, and the four clamping arms are combined in pairs to form a combined clamping arm 2b3 and are symmetrically arranged between the clamping frame plates 2b1. The front end of the wedge block 2b2 is equipped with a clamping plate 2b13 and the rear end is equipped with a screw push plate 2b15. The nut block 2b14 is installed in the middle of the rear of the two clamping frame plates 2b1. A limiting screw 2b10 is installed in the middle of the nut block 2b14. The front end of the limiting screw 2b10 is inserted into the screw push plate 2b15 and fixed with a shaft retaining ring. The rear end of the limiting screw 2b10 is equipped with a clamping hand wheel 2b11. A locking limiting assembly is provided at the rear of the clamping frame plate 2b1. One end of the locking limiting assembly is inserted into the notch opened on the side wall of the guide column 2d, wherein the combined clamping arm 2b3 The front end of the clamp is equipped with two rubber wheels 2b5 and a spacer sleeve 2b4. The hole in the middle of the combined clamping arm 2b3 is connected to a spacer sleeve 2b4 and is hinged to the clamping frame plate 2b1. The rear end of the combined clamping arm 2b3 is equipped with a steel wheel 2b16. The middle section of the rear of the combined clamping arm 2b3 is equipped with a spring fixing pin 2b18. The tension spring 2b17 passes through the long hole in the middle of the wedge block 2b2 and its two ends are respectively hooked on the spring fixing pin 2b18. The above-mentioned locking limit assembly includes a guide sleeve 2b9 provided on both sides of the rear portion of the two clamping frame plates 2b1. Two lock pin brackets 2b8 are provided on the outer side wall of the clamping frame plate 2b1 located above. A lock pin 2b7 is hinged on each lock pin bracket 2b8. The two lock pins 2b7 are connected by a grip rod 2b6. A double bent handle 2b12 is installed on the outer side wall of the clamping frame plate 2b1 on the same side of the grip rod 2b6.

[0028] In the specific implementation process, the lower part of the screw 3f is equipped with a deep groove ball bearing 3s, the outer ring of the deep groove ball bearing 3s is installed on the transition sleeve 3m, the transition sleeve 3m is clamped on the screw 3f by the shaft with a retaining ring, the lower part of the transition sleeve 3m is threadedly connected to the pressure head 3l, and a thrust ball bearing 3t is provided inside the transition sleeve 3m between the pressure head 3l and the screw 3f, wherein the clamping limit assembly includes a middle sleeve 3g arranged in the middle position of the upper end surface of the beam 3a, and a top fork 3o is provided on the outer side of the middle sleeve 3g. The pressure handle 3n is hinged to the bracket on the front side of the beam 3a through the middle hole. The waist-shaped hole on the upper end of the pressure handle 3n is connected to the top fork 3o. The upper surfaces of both sides of the top fork 3o are symmetrically hinged with connecting rods 3p. The other end of the connecting rod 3p is hinged with the lock tongue 3c. The lock tongue 3c is restricted on the beam 3a by the short lock tongue pressure block 3q and the long lock tongue pressure block 3b. The elastic indexing pin 3d is connected to the short lock tongue pressure block 3q by a thread. The guide shoe seats 3i are symmetrically installed at both ends of the beam 3a, and the guide shoe seats 3i are equipped with guide shoe bushings 3h.

[0029] The main working principle is: based on the existing technology, the pressure sensor measuring surface is covered in the sealed cavity or as a part of the sealed cavity to pressurize the sealed cavity to meet the online measurement conditions of the pressure sensor. Due to the structural characteristics of this type of ADCP, in which the pressure sensor is located at the center of the transducer array, the ADCP transducer array is arranged vertically upward. The cover on the surface of the ADCP pressure sensor is removed to expose the pressure sensor measuring surface. The front end of the pressure head, which has a hollow tubular front end, a sealing ring and a sealing groove on the front end face, and a solid rear end, is pressed against the housing surrounding the pressure sensor measuring surface. The sealing ring covers the pressure sensor, forming a sealed cavity, which is then pressurized. It is important to note that the acoustic Doppler current profilers (ADCPs) tested in this application include but are not limited to the following models, such as SC-75kHz, SC-150kHz, SC-300kHz, SC-600kHz, SC-1200kHz, DR-75kHz, DR-150kHz, DR-300kHz, SC-600kHz, and SC-1200kHz, with pressure-resistant depths of 1500m, 3000m, and 6000m.

[0030] The structural principles and working process of each part are as follows: the position of the crossbeam component 3 on the vertical guide rail 4 is determined according to the height of the measured acoustic Doppler current profiler (ADCP). Taking the highest size ADCP as an example, the crossbeam component 3 is supported and the pressure handle 3n is pulled open by hand. The front end of the pressure handle 3n pushes the top fork 3o to move backward. The opening of the top fork 3o is restricted by the middle sleeve 3g in terms of left and right and upward movement. The top fork 3o drives the connecting rod 3p hinged thereto to pull the lock tongue 3c toward the middle direction. The front end of the lock tongue 3c will exit the notch of the vertical guide rail 4, releasing the lock on the crossbeam component 3. The crossbeam component 3 is supported and slides upward along the vertical guide rail 4. The guide shoe bushings 3h and guide shoe seats 3i at both ends of the crossbeam component 3 are provided. The guide shoe constituting the same limits the movement of the crossbeam component 3 in other directions; when the lock tongue 3c on the crossbeam component 3 is aligned with the upper notch of the vertical guide rail 4, the pressure handle 3n is pressed to the limit position, and the front end of the pressure handle 3n pulls the top fork 3o to move forward, and the top fork 3o drives the connecting rod 3p hinged thereto to push the lock tongue 3c in both directions, and the front end of the lock tongue 3c enters the notch of the vertical guide rail 4. At this time, the long lock tongue pressure block 3b and the short lock tongue pressure block 3q limit the front and rear and up and down movement of the lock tongue 3c, and the pin head of the elastic indexing pin 3d is released to be inserted into the limiting hole of the lock tongue 3c, and the lock tongue 3c is restricted from moving in the left and right directions. At this time, the state of the lock tongue 3c inserted into the notch of the vertical guide rail 4 is locked, and the position of the crossbeam component 3 is locked.

[0031] Use the foot to step on the stop hook 2f, and the lock between the front end of the stop hook 2f and the stop block 5 is released. Pull out the pulley component 2, and at the same time hold the double-bend handle 2b12 and the grip rod 2b6. The grip rod 2b6 drives the locking pins 2b7 at both ends to rotate and move. The part of the front end of the locking pin 2b7 inserted into the notch of the guide column 2d is withdrawn, and the lock on the clamping assembly 2b is released. The guide sleeves 2b9 on both sides limit the horizontal movement of the clamping assembly 2b. Lift the clamping assembly 2b and release the grip rod 2b6. With the help of gravity, the grip rod 2b6 moves downward to drive the front end of the locking pin 2b7 to remain close to the surface of the guide column 2d. When passing through the notch on the upper part of the guide column 2d, the front end of the locking pin 2b7 is inserted into the notch to lock the position of the clamping assembly 2b.

[0032] The clamping hand wheel 2b11 is shaken counterclockwise, and the combined clamping arms 2b3 on both sides make the steel wheel 2b16 close to the inclined surface of the wedge block 2b2 under the action of the tension spring 2b17. As the limit screw 2b10 gradually moves backward relative to the nut block 2b14, the screw push plate 2b15 connected to the front end of the limit screw 2b10 drives the wedge block 2b2 to gradually move backward, and the combined clamping arms 2b3 on both sides gradually open; at this time, the ADCP to be measured is moved to the middle of the pulley component 2, and the clamping hand wheel 2b11 is shaken clockwise. The combined clamping arms 2b3 on both sides make the steel wheel 2b16 close to the inclined surface of the wedge block 2b2 under the action of the tension spring 2b17. As the limit screw 2b10 gradually moves forward relative to the nut block 2b14, the push plate 2b15 is pushed forward relative to the nut block 2b14. The screw push plate 2b15 connected to the moving front end moves forward step by step together with the wedge block 2b2, and the combined clamping arms 2b3 on both sides are gradually tightened. The rubber wheels 2b5 and the clamping plates 2b13 on the combined clamping arms 2b3 on both sides are clamped on the outer wall of the ADCP cylinder together. Since this structure can achieve a certain degree of self-centering, it can automatically correct the deviation when the position of the ADCP is partially offset; the pulley component 2 is pushed inward, and when the stop hook 2f at the bottom of the pulley component 2 contacts the stop block 5, the front end of the stop hook 2f is pushed up, and the movement continues, and the front end of the stop hook 2f falls down with the help of gravity and hooks the stop block 5. At this time, the front end of the pulley component 2 just contacts the limit block 6, forming a position locking of the pulley component 2.

[0033] By rotating the hand wheel 3e of the crossbeam component 3 clockwise, the screw 3f moves downward relative to the screw sleeve 3j, driving the pressure head 3l to approach the pressure sensor on the ADCP. When the pressure head 3l contacts the ADCP, the pressure head 3l rotates with the screw 3f and tends to rotate relative to the ADCP housing. The friction generated by the relative rotation will scratch the surface of the ADCP housing. The deep groove ball bearing 3s and thrust ball bearing 3t arranged between the screw 3f, the transition sleeve 3m and the pressure head 3l prevent the occurrence of relative rotation. When the pressure head 3l is pressed against the ADCP housing, a sealed chamber is formed between the pressure head 3l and the measuring surface of the ADCP pressure sensor with the help of the sealing ring 3r. At this time, pressurization through the hydraulic joint 3k can realize online detection of the pressure sensor.

[0034] Three notches are provided on the vertical guide rail 4, so that the crossbeam component 3 has three fixed positions: high, medium and low. Three notches are provided on the guide column 2d, so that the clamping assembly has three fixed positions: high, medium and low. At the same time, with the help of the length of the screw 3f, it can adapt to ADCPs with three height ranges. The self-centering clamping assembly 2b can adapt to the different outer diameters of the ADCP barrel. Therefore, the device can meet the online detection of pressure sensors of ADCPs of various specifications.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An acoustic Doppler flow profiler pressure sensor online detection device, characterized in that: It comprises a main frame (1), a pulley component (2) and a crossbeam component (3); The main frame (1) is formed by welding square tubes, and two parallel square tubes are arranged at the bottom as support rails for the pulley component (2). Two vertical guide rails (4) are symmetrically arranged on both sides of the main frame (1). The crossbeam component (3) is placed between the two vertical guide rails (4). The stop block (5) is installed on the front side of the bottom of the main frame (1), and the limit block (6) is installed on the rear side of the bottom of the main frame (1). The pulley component (2) includes a pulley frame (2a) welded from a square tube and a steel plate, three pairs of track wheels (2e) are respectively provided on both sides of the bottom of the pulley frame (2a) at the front, middle and rear positions, two guide columns (2d) are mounted on the pulley frame (2a) by means of a conical seat (2c), a handle (2g) is provided on the top of the pulley frame (2a), a clamping assembly (2b) is provided on the two guide columns (2d), a stop hook (2f) is installed at the bottom of the pulley frame (2a), and two locking pins of the clamping assembly (2b) are respectively inserted into notches provided on the side walls of the guide columns (2d); The crossbeam component (3) includes a crossbeam (3a) formed by welding steel plates, a screw sleeve (3j) is installed in the middle lower part of the crossbeam (3a), a screw rod (3f) is spirally installed in the screw sleeve (3j), a pressing head (3l) is installed at the lower part of the screw rod (3f), a sealing groove is provided on the lower end surface of the pressing head (3l), a sealing ring (3r) is installed in the sealing groove, a hydraulic joint (3k) is installed on the rear side of the pressing head (3l), and a hand wheel (3e) is installed on the upper end of the screw rod (3f), and a clamping limit assembly is provided on the crossbeam (3a), and one end of the clamping limit assembly is inserted into a notch opened on the side of the vertical guide rail (4).

2. The online detection device for an acoustic Doppler flow profiler pressure sensor according to claim 1, characterized in that: The clamping assembly (2b) comprises two clamping frames (2b1) arranged opposite to each other and fixed to each other, a wedge block (2b2) ​​mounted in a groove between the two clamping frames (2b1), four clamping arms are combined in pairs to form combined clamping arms (2b3) and are symmetrically arranged between the clamping frames (2b1), a clamping plate (2b13) is mounted at the front end of the wedge block (2b2) ​​and a screw push plate (2b15) is mounted at the rear end, and a nut block (2b14) is mounted between the two clamping frames (2b1). A limiting screw (2b10) is installed in the middle of the rear portion of the holding frame plate (2b1) and the nut block (2b14). The front end of the limiting screw (2b10) is inserted into the screw push plate (2b15) and fixed with a shaft retaining ring. The rear end of the limiting screw (2b10) is equipped with a clamping hand wheel (2b11). The rear portion of the clamping frame plate (2b1) is provided with a locking limiting component. One end of the locking limiting component is inserted into a notch opened on the side wall of the guide column (2d).

3. The online detection device for an acoustic Doppler flow profiler pressure sensor according to claim 2, characterized in that: The clamping front end of the combined clamping arm (2b3) is equipped with two rubber wheels (2b5) and a spacer sleeve (2b4); a hole in the middle of the combined clamping arm (2b3) is connected to a spacer sleeve (2b4) and is hinged to the clamping frame plate (2b1); a steel wheel (2b16) is installed at the rear end of the combined clamping arm (2b3); a spring fixing pin (2b18) is installed at the rear middle section of the combined clamping arm (2b3); a tension spring (2b17) passes through the long hole in the middle of the wedge block (2b2) ​​and has its two ends hooked on the spring fixing pin (2b18) respectively.

4. The online detection device for an acoustic Doppler flow profiler pressure sensor according to claim 2, characterized in that: The locking and limiting assembly comprises guide sleeves (2b9) arranged on both sides of the rear of the two clamping frame plates (2b1); two locking pin brackets (2b8) are installed on the outer side wall of the clamping frame plate (2b1) located above; a locking pin (2b7) is hinged on each locking pin bracket (2b8); the two locking pins (2b7) are connected by a gripping rod (2b6); and a double-bent handle (2b12) is installed on the outer side wall of the clamping frame plate (2b1) located on the same side as the gripping rod (2b6).

5. The online detection device for an acoustic Doppler flow profiler pressure sensor according to claim 1, characterized in that: A deep groove ball bearing (3s) is installed at the lower part of the screw (3f), the outer ring of the deep groove ball bearing (3s) is installed on a transition sleeve (3m), the transition sleeve (3m) is clamped on the screw (3f) by a shaft retaining ring, the lower part of the transition sleeve (3m) is threadedly connected to the pressing head (3l), and a thrust ball bearing (3t) is provided inside the transition sleeve (3m) between the pressing head (3l) and the screw (3f).

6. The online detection device for an acoustic Doppler flow profiler pressure sensor according to claim 1, characterized in that: The clamping limit assembly comprises a middle sleeve (3g) arranged at the middle position of the upper end surface of the crossbeam (3a), a top fork (3o) is provided on the outer side of the middle sleeve (3g), a pressure handle (3n) is hinged to the bracket on the front side of the crossbeam (3a) through a middle hole, a waist-shaped hole on the upper end of the pressure handle (3n) is connected to the top fork (3o), the upper surfaces of both sides of the top fork (3o) are symmetrically hinged to the connecting rod (3p), the other end of the connecting rod (3p) is hinged to the lock tongue (3c), the lock tongue (3c) is restricted on the crossbeam (3a) by the lock tongue short pressure block (3q) and the lock tongue long pressure block (3b), the lock tongue short pressure block (3q) is connected to the elastic indexing pin (3d) by a thread, and guide shoe seats (3i) are symmetrically installed at both ends of the crossbeam (3a), and the guide shoe seat (3i) is provided with a guide shoe liner (3h) inside.

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