CN211592856U - Portable electric side-scan sonar board side support capable of reducing stress of cross bar - Google Patents

Abstract

The utility model discloses a can alleviate portable electronic side scan sonar topside support of horizontal pole atress, including fixing device, fixing device fixes on the mooring bollard of ship side, is equipped with worm wheel and worm that the meshing is in the same place in the fixed box, and the epaxial winding of admission shaft of hoisting motor output has motor-driven wire rope, and motor-driven wire rope passes the spacing ring behind holding ring, fixed pulley and links to each other with the sonar. The portable detachable mobile phone has the functions of portability, detachability and easy installation, reduces the requirement on loading space and reduces the difficulty of achievement application; the purposes of saving time and labor and protecting personnel and instruments and equipment are achieved; the ship structure is fully utilized, and the problems that the side space of the ship is narrow and the side dragging of the ship is difficult to realize and the sonar dragging of the fish is difficult to realize are effectively solved; the side bracket is not required to be disassembled, and the functions of enabling a plurality of ships to lean against and berth the wharf are realized. In addition, hoist and mount sonar's hoisting motor installs on the support, can alleviate the horizontal pole atress condition, improves the life-span.

Description

Portable electric side-scan sonar board side support capable of reducing stress of cross bar

Technical Field

The utility model relates to a marine survey and drawing field especially relates to can alleviate portable electronic side scan sonar topside support of horizontal pole atress.

Background

The development plan of the Chinese maritime affair navigation guarantee 'thirteen five' is proposed to cover the coastal region, move to the open sea and serve the whole world in 2020, fully fulfill the navigation guarantee business management responsibility of the traffic water area, build a Chinese modern civil navigation book service system based on the ocean space geographic information, achieve the international advanced level of navigation guarantee capability and service, and meet the implementation requirement of the national strategy for deeply reforming the ocean.

The side scan sonar is one of the necessary devices to complete the target, and can form landform information through backscattering of echo on the seabed, form final seabed image information, and is also an important mode of seabed imaging. The sonar drags the operation mode that the fish divide into 2 kinds of flexible couplings when the operation is swept to the side scan sonar sea: tail drags and side drags. The defects of the tail towing operation mode are as follows: (1) the released fish towing cable is long (about 30-50 meters), and the time for retracting and releasing the fish towing cable is long. In the shallow water measurement process, the fish needs to be retracted when the measuring boat turns around and turns to prevent the fish from touching the bottom, and the fish is pulled down after the boat sails normally. Therefore, the dragfish needs to be collected and stored frequently every day. (2) The distance between the towed fish and the sea bottom is closer, and the danger coefficient of the towed fish being hung by unidentified objects in the sea water is higher. (3) When meeting emergency at sea or avoiding fishing boats and commercial ships, the fish-dragging device needs to be timely retracted in many cases.

Therefore the utility model discloses research and development one set of portable detachable topside sonar support, the dismantlement of realization support that can be quick, the realization that simultaneously also can be quick drags receiving and releasing of fish in order to reach the purpose of practicing thrift the human cost.

In view of the actual situation that the water depth of the northern sea area is shallower than that of the east sea and the south sea, the side scan sonar operation in the district belonging to the Tianjin maritime affairs surveying and mapping center of the North sea navigation support of the transportation department mostly adopts a side dragging mode. At present, when 2 own measuring vessels 'seatour 1504' and 'seatour 1505' carry out side-scan sonar sea-sweeping operation, the fish towing and collecting still adopts a working mode of manual collection and collecting. The mode generally needs 3-4 workers, due to the fact that the towed fish is heavy (for example, the towed fish mass of Edgetech 4200 is about 50kg), a ship shakes during operation, the operation space on two sides of a ship board of two measuring ships is narrow, the distance between a ship board railing and the sea surface is high (about 3 m), and the like, the workers need to stretch out of the ship board to operate in the towed fish storing and releasing process, and therefore the towed fish device is dangerous, and meanwhile, the towed fish device is easy to collide with the ship board and the ship body in the operation process, so that the towed fish transducer array and the tail wing are easy to damage.

If two survey boats and ships broadside and reform transform welding gallows, these two survey boats and ships narrow and small not easily realize, reform transform the scheme of ship broadside space structure and lead to its feasibility not high because of the degree of difficulty is big and violate the ship and examine the regulation easily.

Disclosure of Invention

The utility model discloses aim at solving prior art not enough, and provide the portable electronic side scan sonar topside support that can alleviate the horizontal pole atress.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: a portable electric side-scan sonar side-port bracket capable of reducing stress of a cross rod comprises a fixing device, wherein the fixing device is fixed on a mooring bollard at the side of a ship, a stress box body is arranged on the top surface of the fixing device, a fixing box body is arranged in the stress box body, a worm gear and a worm which are meshed together are arranged in the fixing box body, one end of the worm sequentially penetrates through the fixing box body and the stress box body and is connected with a hand wheel after penetrating through the stress box body, a hoisting motor and a vertical support are arranged on the top surface of the stress box body, the support is rotationally connected with the stress box body, a stress ring is arranged in the middle of the support, the bottom surface of the stress ring is attached to the top surface of the stress box body, the lower end of the support sequentially penetrates through the stress box body and the fixing box body and is fixedly connected with an inner ring of the worm gear after penetrating through the stress, the one end that the support was kept away from to the horizontal pole even has the montant, installs the receipts spool on hoisting motor's the output shaft, all is equipped with a plurality of holding rings on horizontal pole and the montant, and the one end that horizontal pole and montant are connected is equipped with the fixed pulley, and the lower extreme of montant is equipped with the spacing ring, and the receipts spool winding on the hoisting motor output shaft has motor-driven wire rope, and motor-driven wire rope passes the spacing ring behind holding ring, fixed pulley and links to.

Fixing device includes two parallel arrangement's channel-section steel, matches on two channel-section steels and is equipped with a plurality ofly to the fixed orifices, and every has worn a lead screw in every fixed orifices, and the lead screw passes through the nut to be fixed on the channel-section steel, channel-section steel top surface and atress box bottom surface fixed connection, and the mooring bollard of ship side is located between two adjacent lead screws to carry out spacing fixedly through two adjacent lead screws.

The fixed box body and the stressed box body are both rotationally connected with the worm.

And a supporting device is arranged on one side of the stress box body and used for supporting the cross rod.

The supporting device comprises an inclined clamping groove and a supporting rod, the clamping groove is fixed on the stressed box body, one end of the supporting rod is located in the clamping groove and fixed in the clamping groove through a bolt, the other end of the supporting rod is connected with a supporting arc plate, the supporting arc plate is attached to the side wall of the bottom of the cross rod, and the supporting arc plate is fixed on the cross rod through a bolt.

The support includes that three axis coincidence and cylinder linked together, three cylinder be for connecting gradually and diameter increase progressively first cylinder, second cylinder and third cylinder, and the opposite side of third cylinder even has the fixed plate that two parallels were equipped with, first cylinder and worm wheel inner ring fixed connection, and pneumatic cylinder and horizontal pole all articulate on the fixed plate, and the atress ring is fixed on the second cylinder.

The utility model has the advantages that: the portable detachable portable type mobile terminal has the functions of portability, detachability and easiness in installation, the requirement of the portable type mobile terminal on a loading space is reduced, and the difficulty in achievement application is reduced; the purposes of saving time and labor and protecting personnel and instruments and equipment are achieved; the ship structure is fully utilized, and the problems that the side space of the ship is narrow and the side dragging of the ship is difficult to realize and the sonar dragging of the fish is difficult to realize are effectively solved; the side bracket is not required to be disassembled, and the functions of enabling a plurality of ships to lean against and berth the wharf are realized. In addition, hoist and mount sonar's hoisting motor installs on the support, can alleviate the horizontal pole atress condition, improves the life-span.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the connection between channel steel and a stressed box body;

FIG. 3 is a cross-sectional view taken along line G-G of FIG. 2;

FIG. 4 is a schematic structural view of a pedestal;

FIG. 5 is a schematic structural diagram of a force-bearing box;

FIG. 6 is a schematic view of the connection between the support bar and the support arc plate;

FIG. 7 is a schematic diagram of the position relationship of the test force-bearing points;

FIG. 8 is a graph showing stress data of the strain gage No. 1 during the process of storing and releasing the fish towing;

FIG. 9 is a graph of stress data of No. 2 strain gauge during the fish towing process;

FIG. 10 is a graph showing stress data of No. 3 strain gauge in the process of storing and releasing the towed fish;

FIG. 11 is a graph of stress data of strain gage No. 1 during operation;

FIG. 12 is a graph of stress data for No. 2 strain gage during operation;

FIG. 13 is a graph of stress data of No. 3 strain gauge in the process of operation;

FIG. 14 is a graph showing stress data of No. 4 strain gauge in the process of storing and releasing the towed fish;

FIG. 15 is a graph showing stress data of No. 5 strain gauge in the process of storing and releasing the towed fish;

FIG. 16 is a graph of stress data of No. 6 strain gauge during the fish towing process;

FIG. 17 is a graph of stress data of No. 4 strain gauge in the process of operation;

FIG. 18 is a graph of stress data of No. 5 strain gauge in the process of operation;

FIG. 19 is a graph of stress data for No. 6 strain gage during operation;

FIG. 20 is a graph of stress data of No. 7 strain gauge during fish towing retraction;

FIG. 21 is a graph of stress data of No. 8 strain gauge during the fish towing process;

FIG. 22 is a graph of stress data for No. 7 strain gage during operation;

FIG. 23 is a graph of stress data for No. 8 strain gage during operation;

FIG. 24 is a graph of stress data of No. 9 strain gauge during the fish towing process;

FIG. 25 is a graph showing stress data of No. 10 strain gauge in the process of storing and releasing the towed fish;

FIG. 26 is a graph of stress data for No. 9 strain gage during operation;

FIG. 27 is a graph of stress data of No. 10 strain gauge during operation;

FIG. 28 is a graph of stress data of No. 11 strain gauges during fish towing retraction;

FIG. 29 is a graph of stress data of No. 12 strain gauges during fish towing retraction;

FIG. 30 is a graph of stress data for strain gage 11 during operation;

FIG. 31 is a graph of stress data for No. 12 strain gage during operation;

in the figure: 1-a fixture; 2-a stress box body; 3, fixing the box body; 4-hand wheel; 5-a hoisting motor; 6-support; 7-a hydraulic cylinder; 8-a cross bar; 9-vertical rod; 10-a positioning ring; 11-a fixed pulley; 12-a stop collar; 13-motorized wire rope; 14-sonar; 15-stress ring; 16-channel steel; 17-a lead screw; 18-a support means; 19-a card slot; 20-supporting the supporting rod; 21-supporting arc plates; 22-a first cylinder; 23-a second cylinder; 24-a third cylinder; 25-fixing the plate;

the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

as shown in fig. 1-6, can alleviate portable electronic side scan sonar topside support of horizontal pole atress, including fixing device 1, fixing device 1 is fixed on the bollard of ship side, fixing device 1 includes two parallel arrangement's channel-section steel 16, it is equipped with a plurality of pairs of fixed orificess to match on two channel-section steels 16, and every has worn a lead screw 17 in every fixed orificess, lead screw 17 passes through the nut to be fixed on channel- section steel 16, 16 top surfaces of channel-section steels and the 2 bottom surface fixed connection of atress box, the bollard of ship side is located between two adjacent lead screws 17 to carry out spacing fixedly through two adjacent lead screws 17.

The top surface of the fixing device 1 is provided with a stress box body 2, a fixing box body 3 is arranged in the stress box body 2, a worm wheel and a worm which are meshed together are arranged in the fixing box body 3, one end of the worm sequentially penetrates through the fixing box body 3 and the stress box body 2, a hand wheel 4 is connected after penetrating through the stress box body 2, and the fixing box body 3 and the stress box body 2 are both connected with the worm in a rotating mode.

The top surface of a stress box body 2 is provided with a hoisting motor 5 and a vertical support 6, the hoisting motor 5 is fixed on the stress box body 2, the support 6 is rotatably connected with the stress box body 2, the middle part of the support 6 is provided with a stress ring 15, the bottom surface of the stress ring 15 is attached to the top surface of the stress box body 2, the lower end of the support 6 sequentially penetrates through the stress box body 2 and a fixed box body 3 and is fixedly connected with an inner ring of a worm gear after penetrating through the stress box body 2 and the fixed box body 3, the upper part of the support 6 is sequentially articulated with a hydraulic cylinder 7 and a cross rod 8 from top to bottom, a piston rod of the hydraulic cylinder 7 is articulated with one end of the cross rod 8 close to the support 6, one end of the cross rod 8 far away from the support 6 is connected with a vertical rod 9, an output shaft of the hoisting motor 5 is installed on an output shaft, a wire take-up shaft on an output shaft of the hoisting motor 5 is wound with a motorized steel wire rope 13, and the motorized steel wire rope 13 passes through the positioning ring 10 and the fixed pulley 11 and then passes through the limiting ring 12 to be connected with the sonar 14.

Strutting arrangement 18 is installed to atress box 2 one side for to the support of horizontal pole 8, strutting arrangement 18 is including the draw-in groove 19 and the support die-pin 20 of slope, and draw-in groove 19 is fixed on atress box 2, and the one end of supporting die-pin 20 is located draw-in groove 19 to fix in draw-in groove 19 through the bolt, the other end of supporting die-pin 20 even has support arc board 21, supports the laminating of arc board 21 and 8 bottom lateral walls of horizontal pole, and passes through the bolt fastening on horizontal pole 8.

The support 6 includes the cylinder that three axis coincidence and link together, and three cylinder is for connecting gradually and diameter increases progressively first cylinder 22, second cylinder 23 and third cylinder 24, and the opposite side of third cylinder 24 even has two parallel fixed plates 25 that are equipped with, first cylinder 22 and worm wheel inner ring fixed connection, and pneumatic cylinder 7 and horizontal pole 8 all articulate on fixed plate 25, and atress ring 15 is fixed on second cylinder 23.

The utility model discloses during operation, when putting sonar 14 into the sea, the staff fixes fixing device 1 on the mooring bollard of ship side, motor-driven wire rope 13 passes spacing ring 12 behind holding ring 10, fixed pulley 11 and links to each other with sonar 14, fix sonar 14 behind motor-driven wire rope 13, rotate hand wheel 4, rotate sonar 14 from the ship side to the sea, adjust the angle of horizontal pole 8 slope through pneumatic cylinder 7, after the regulation is accomplished, support fixedly with strutting arrangement 18, then hoist motor 5 works, put sonar 14 into the sea 35-45 meters, motor-driven wire rope 13 and sonar 14 are connected into the sea, belong to the flexible coupling, the follow-up is good, thereby reduce the impact of foreign object to sonar 14; when the sonar 14 is withdrawn, the hoisting motor 5 works to withdraw the sonar 14 to the position of the limiting ring 12, namely the position of the sonar 14 just out of the sea surface, the motorized steel wire rope 13 is fixed on the cross rod 8 and the vertical rod 9 and is converted into hard connection through soft connection, the sonar 14 is placed to swing left and right, the supporting device 18 is removed, then the hydraulic cylinder 7 lifts the cross rod 8 upwards, the sonar 14 is separated from the sea level by 2-3 meters, and a worker rotates the hand wheel 4 to rotate the sonar 14 to the side of the ship to withdraw the sonar 14. The fixing device 1 can be conveniently fixed on the mooring bollard at the side of the ship without dismantling the side bracket and modifying the ship, the utility model has the functions of portability, detachability and easy installation, reduces the requirement on loading space, and reduces the difficulty of achievement application; the purposes of saving time and labor and protecting personnel and instruments and equipment are achieved; the ship structure is fully utilized, and the problems that the side space of the ship is narrow and the side dragging of the ship is difficult to realize and the sonar dragging of the fish is difficult to realize are effectively solved; the side bracket is not required to be disassembled, and the functions of enabling a plurality of ships to lean against and berth the wharf are realized. In addition, hoist and mount sonar 14's hoisting motor 5 is installed on support 6, can alleviate the horizontal pole 8 atress condition, improves the life-span.

The utility model discloses a stress test as follows:

a. purpose of testing

The method is mainly used for verifying whether the stress of a key point of the side-scan sonar support is less than the yield limit 323MPa of 304 stainless steel and whether the structure is safe.

b. Test procedure

At the in-process of sonar support device installation good test operation, selected 6 points on sonar support device, data acquisition has been done to the strain condition of support in sonar receive and releases and the working process through the strainometer. As the sonar bracket device is made of 304 stainless steel, the elastic modulus is 193GPa, the Poisson ratio is 0.3, and the minimum tensile yield stress of the 304 stainless steel is 323MPa when the material is subjected to tensile and compression tests. And substituting the measured strain value into a formula to calculate the stress value of each measuring point, thereby verifying the reliability and safety of the structure. In order to obtain the main stress value of the measuring point, a 45-degree triaxial strain pattern is required to be used for measurement, and the stress strain calculation formula of the 45-degree triaxial strain pattern is as follows:

calculating the main strain:

calculating the main stress:

after the measuring points are determined, the measuring points are polished by abrasive paper, and are wiped by alcohol cotton, then the strain gauge is scribed and pasted along the design direction, the strain gauge is connected with a strain tester by using a terminal, and then the strain test data of each measuring point is collected by the strain tester.

The distribution of the selected 6 points is shown in fig. 7, wherein A, B two points are respectively located at the upper and lower sides of the cross bar 8 and are vertically symmetrical, 45 ° triaxial strain patterns are pasted at A, B two places, and the axial direction of the 45 ° strain gauge is parallel to the axial direction along the cross bar 8. E. The points F are positioned on two sides of the stress box body 2 and are bilaterally symmetrical, and two strain gauges in the horizontal direction and the vertical direction which are perpendicular to each other are respectively adhered at the points E, F. C. D, sticking a one-way strain gauge respectively at two positions, wherein the axes of the two strain gauges are parallel to the axis of the rod in the working state.

The strain values and the calculated stress values in the process of collecting and releasing the towed fish are shown in the table 1:

TABLE 1 stress-strain situation table at A position in towing fish collecting and releasing process

The strain values during the operation and the calculated stress values are shown in table 2:

TABLE 2 stress-strain situation table at A position in operation process

Point A is pasted and is had No. 1 foil gage, No. 2 foil gage and No. 3 foil gage, and No. 2 foil gage is located the middle part of horizontal pole 8, and is on a parallel with the axis of horizontal pole 8, and No. 1 foil gage and No. 3 foil gage are located the top and the below of No. 2 foil gages respectively.

As shown in FIGS. 8-13, through the data, the maximum value of micro strain in the three strain gauge channels is 949.4MPa, the corresponding maximum stress is 183.2MPa, the maximum value of main stress obtained through a 45-degree trilogy strain gauge stress calculation formula is 187.2MPa, the maximum value of main stress calculated through an effective micro strain value is 10.8MPa and is lower than the yield limit 364MPa of the material, so that the structure meets the strength requirement in the process of retracting and releasing the fish. In the working process of the sonar, the main stress calculated through the maximum value and the effective value micro-strain is far smaller than the yield limit of the material, so that the safety of the structure in the working process can be ensured.

Point B is pasted with 4 gauge, 5 gauge and 6 gauge, and 5 gauges are located the middle part of horizontal pole 8, and are on a parallel with the axis of horizontal pole 8, and 4 gauges and 6 gauge are located the top and the below of 5 gauge respectively.

The strain stress situation in the process of retracting and releasing the towed fish is shown in table 3:

TABLE 3 Strain stress situation table at B position in towing fish collecting and releasing process

The stress-strain during operation is shown in table 4:

TABLE 4 stress-strain situation table at B position in operation process

As shown in fig. 14-19, since the A, B points are located at the same length position of the rod and are symmetrical with respect to the horizontal plane, the test data of the A, B points can be corresponded to each other, and it can be seen from the above table that the point B is subjected to compressive stress during the retracting process, the maximum value is 141MPa, the effective value is 97.9MPa, and the strength requirement is met. The stress results during operation are also much less than the yield strength of the material and so meet the requirements.

And a No. 7 strain gauge is pasted on the point C, and a No. 8 strain gauge is pasted on the point D.

The strain stress situation during the fish towing process is shown in table 5:

TABLE 5 Strain stress conditions at C, D during towing fish retrieving and releasing process

The strain stress during the operation is shown in table 6:

TABLE 6 Strain stress situation at C, D during operation

As shown in fig. 20-23, from the calculation results of micro strain, we can see that the maximum stress and effective stress values at the two measuring points 7 and 8 in the above table are much smaller than the yield stress value of the material, so that the strength of the two points can be ensured.

And a 9 # strain gauge and a 10 # strain gauge are adhered to the point E, and the 10 # strain gauge is positioned above the 9 # strain gauge.

The strain stress situation during the fish towing process is shown in table 7:

TABLE 7 Strain stress situation table at E position in towing fish collecting and releasing process

The strain stress during the operation is shown in table 8:

TABLE 8 table of E-position strain stress during working

Serial number	Maximum value of μ ε	Stress (MPa)	Effective value of μ ε	Stress (MPa)
					9	30.16	5.8	17.55	3.39
10	-40.86	-7.89	25.9	5.0

As shown in fig. 24-27, the point E is located in the stern direction, so the stress applied to the point 10 during the ship's travel is compressive stress, and after the maximum and effective stress values are observed and calculated, we can see that the stress both meets the strength requirement of the structure.

And point E is adhered with a No. 11 strain gauge and a No. 12 strain gauge, and the No. 12 strain gauge is positioned above the No. 11 strain gauge.

The strain stress situation during the fish towing process is shown in table 9:

TABLE 9 Strain stress situation table at F position in towing fish collecting and releasing process

Serial number	Maximum value of μ ε	Stress (MPa)	Effective value of μ ε	Stress (MPa)
					11	-66	-12.74	14.2	2.74
12	-66	-12.74	22	4.25

The strain stress during the operation is shown in table 10:

TABLE 10 table of F-point strain stress during operation

Serial number	Maximum value of μ ε	Stress (MPa)	Effective value of μ ε	Stress (MPa)
					11	-19.46	-3.76	11.7	2.26
12	-24.3	-4.69	15.4	2.97

As shown in fig. 28-31, point F is located in the bow direction and point E is symmetric about the vertical plane of the tank, so the difference between the stress magnitude of the point F and the stress magnitude of the point E is not large, and after the stress is calculated, the stress is found to be far smaller than the strength limit, so that the requirements are met.

c. Conclusion of the test

(1) According to the result of mechanical property analysis, positions with larger stress and some key points concerned in the test operation are selected for strain test, and the stress of the test points is analyzed and calculated.

(2) The strain of the towed fish in the retracting process and the working process is measured.

(3) In the operation process, strain values of various measuring points under different ship speeds are measured, the extreme condition of ship running is considered, and the highest ship speed reaches 8 knots.

(4) The test result shows that the stress of each test point is far less than the yield limit 323MPa of 304 stainless steel, the structure is safe, and the broadside sonar bracket can work safely and normally.

(5) The test result shows that the stress box body 2 bears partial force on the cross rod 8, and then the service life of the utility model is prolonged.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.

Claims (5)

1. A portable electric side scan sonar shipboard side support capable of reducing stress of a cross bar comprises a fixing device (1) and is characterized in that the fixing device (1) is fixed on a mooring bollard on the side of a ship, a stress box body (2) is arranged on the top surface of the fixing device (1), a fixing box body (3) is arranged in the stress box body (2), a worm wheel and a worm which are meshed together are arranged in the fixing box body (3), one end of the worm sequentially penetrates through the fixing box body (3) and the stress box body (2), a hand wheel (4) is connected after penetrating through the stress box body (2), a hoisting motor (5) and a vertical support (6) are arranged on the top surface of the stress box body (2), the hoisting motor (5) is fixed on the stress box body (2), the support (6) is rotatably connected with the stress box body (2), a stress ring (15) is arranged in the middle of the support (6), the bottom surface of the stress, the lower end of a support (6) sequentially penetrates through a stress box body (2) and a fixed box body (3), and is fixedly connected with an inner ring of a worm wheel after penetrating through the stress box body (2) and the fixed box body (3), the upper part of the support (6) is sequentially hinged with a hydraulic cylinder (7) and a cross rod (8) from top to bottom, a piston rod of the hydraulic cylinder (7) is hinged with one end, close to the support (6), of the cross rod (8), one end, far away from the support (6), of the cross rod (8) is connected with a vertical rod (9), a take-up shaft is installed on an output shaft of a hoisting motor (5), a plurality of positioning rings (10) are arranged on the cross rod (8) and the vertical rod (9), a fixed pulley (11) is arranged at one end, connected with the vertical rod (9), a limiting ring (12) is arranged at the lower end of the vertical rod (9), a motorized steel wire rope (, The fixed pulley (11) passes through the limit ring (12) and is connected with the sonar (14).

2. The portable electric side scan sonar board side support capable of reducing stress of the cross bar according to claim 1 is characterized in that the fixing device (1) comprises two parallel-arranged channel steel (16), a plurality of pairs of fixing holes are formed in the two channel steel (16) in a matched mode, a lead screw (17) penetrates through each pair of fixing holes, the lead screw (17) is fixed to the channel steel (16) through a nut, the top surface of the channel steel (16) is fixedly connected with the bottom surface of the stress box body (2), and a mooring bollard on the ship side is located between two adjacent lead screws (17) and is limited and fixed through the two adjacent lead screws (17).

3. The portable electric side scan sonar broadside bracket capable of reducing the stress of the cross bar according to claim 1, wherein a supporting device (18) is installed on one side of the stress box body (2) and is used for supporting the cross bar (8).

4. The portable electric side scan sonar board side support capable of reducing stress of the cross rod according to claim 3, wherein the supporting device (18) comprises an inclined clamping groove (19) and a supporting rod (20), the clamping groove (19) is fixed on the stress box body (2), one end of the supporting rod (20) is located in the clamping groove (19) and fixed in the clamping groove (19) through a bolt, the other end of the supporting rod (20) is connected with a supporting arc plate (21), and the supporting arc plate (21) is attached to the bottom side wall of the cross rod (8) and fixed on the cross rod (8) through a bolt.

5. The portable electric side scan sonar broadside bracket capable of reducing stress of the cross rod according to claim 1, wherein the support (6) comprises three cylinders which are overlapped and connected together along the axis, the three cylinders are a first cylinder (22), a second cylinder (23) and a third cylinder (24) which are sequentially connected and have gradually increased diameters, the other side of the third cylinder (24) is connected with two fixing plates (25) which are arranged in parallel, the first cylinder (22) is fixedly connected with an inner ring of a worm wheel, the hydraulic cylinder (7) and the cross rod (8) are both hinged on the fixing plates (25), and the stress ring (15) is fixed on the second cylinder (23).

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