Buoyancy anti-rotation switch mechanism of riverbed material sampler

Abstract

The utility model relates to a buoyancy anti-rotation switch mechanism of a riverbed material sampler, which comprises an anti-rotation structure fixed on a turntable and a clamping head in selective anti-rotation fit with the anti-rotation structure, the clamping head is assembled on the upper side of a shaft sleeve in a floating manner, a hinge seat and a switch piece are arranged on the shaft sleeve, and the switch piece comprises a buoy and a pressing rod connected with the buoy. The pressing rod is hinged to the hinge seat, the end, away from the buoy, of the pressing rod is arranged on the clamping head in a pressed mode, the buoy can swing upwards under the buoyancy effect of water and press the clamping head downwards, and the buoy swings downwards by means of gravity and releases the clamping head after the buoyancy disappears. After the whole riverbed material sampler enters water along with the lead fish, the tail of the buoy in the switch piece can be lifted, the pressing rod can be pressed downwards, the clamping head is clamped into the anti-rotation structure, at the moment, the rotating disc cannot rotate, and normal work of the sampler is guaranteed. After the fish lead flows out of water, the tail of the buoy falls down, the pressing rod is lifted up, the clamping head bounces upwards and is separated from the clamping groove of the anti-rotation structure, at the moment, the rotating disc can rotate, and the purpose of switching the samplers is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of river bed material sampling devices, and particularly relates to a buoyancy anti-rotation switch mechanism for a river bed material sampler. Background Technique

[0002] Hydrological cableways play an important role in hydrological monitoring, providing important and detailed hydrological data for national flood control and engineering construction applications. River bed material sampling is an important task in hydrological data. The particle size distribution of river bed materials is related to river regulation research, hydrological law research, and reservoir operation decision-making research. Currently, hydrological cableways mainly rely on anchor samplers to dig river bed materials. The cableway sampling back and forth requires a long sampling duration, and only one water sample can be taken at a time, which cannot improve the work efficiency of river bed material sampling. In view of this situation, a river bed material sampling device with multiple bins has been designed. A number of samplers can be installed on its turntable. However, when adjacent samplers are sampling, the turntable needs to be rotated after the sampler is lifted out of the water to switch the sampler. Therefore, it is required that the sampler cannot rotate randomly during underwater sampling, and can be rotated on the water surface to switch the sampler. Therefore, it is necessary to design a buoyancy anti-rotation switch mechanism for a river bed material sampler. Content of the Utility Model

[0003] The purpose of the utility model is to provide a buoyancy anti-rotation switch mechanism for a river bed material sampler to match the river bed material sampling device with multiple bins and meet the requirements of anti-rotation underwater and rotation on the water surface.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The buoyancy anti-rotation switch mechanism for a river bed material sampler includes an anti-rotation structure for fixing on the turntable, and a chuck selectively and rotationally engaged with the anti-rotation structure. The chuck is floatingly assembled on the upper side of a bushing. The bushing is provided with a hinge seat and a switch member. The switch member includes a floating cylinder and a pressure rod connected to the floating cylinder. The pressure rod is hinged to the hinge seat. The end of the pressure rod away from the floating cylinder presses on the chuck. The floating cylinder can swing upward under the buoyancy of water and press down the chuck, and swing downward by gravity and release the chuck after the buoyancy disappears.

[0006] Further, the anti-rotation structure includes a disk body. The disk body is provided with a number of convex blocks. The convex blocks are distributed at intervals along the circumference. A clamping groove is formed between adjacent convex blocks for the chuck to be clamped into to achieve rotational engagement.

[0007] Further, the chuck includes a limiting portion, a pressure-receiving portion, and an installation groove. The limiting portion is used for being clamped into the clamping groove. The pressure-receiving portion is in contact and cooperation with the pressure rod. The installation groove is located on the lower side of the chuck. An elastic element is installed in the installation groove, and the elastic element abuts against the outer peripheral surface of the bushing.

[0008] Furthermore, a clamping head seat is provided on the shaft sleeve, and the clamping head seat includes two clamping plates, and the clamping head is limited between the two clamping plates.

[0009] Furthermore, at least one of the clamping plates is provided with a through hole for the pressure rod to pass through.

[0010] Furthermore, there are two articulated seats, which are spaced apart in the circumferential direction of the shaft sleeve, and the pressure rod is selectively connected to one of the articulated seats.

[0011] Furthermore, a clamping head seat is provided on the shaft sleeve, and the clamping head seat includes two clamping plates, and the clamping head is limited between the two clamping plates. The clamping plates are provided with through holes for the pressure rod to pass through.

[0012] Furthermore, the outer diameter of the pressure rod is smaller than the outer diameter of the buoy, and the length of the pressure rod is smaller than the length of the buoy.

[0013] Furthermore, a connecting sleeve is vertically provided at the middle of the pressure rod, and the connecting sleeve is hinged to the hinge seat through a hinge shaft.

[0014] Beneficial effects of the utility model:

[0015] The riverbed sampler is connected to the existing hydrological test lead fish. After the lead fish enters the water, the float in the switch is affected by the buoyancy, and the tail of the float can be lifted. At the same time, the pressure rod is pressed down and the clamp head is clamped into the slot of the anti-rotation structure. At this time, the turntable cannot rotate, ensuring that the sampler can still work normally under the impact of water flow. After the lead fish leaves the water, the float is affected by its own gravity, and the tail of the float falls down. At the same time, the pressure rod is lifted, and the clamp head bounces up and disengages from the slot of the anti-rotation structure. At this time, the turntable can rotate to realize the rotation between several samplers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereoscopic diagram of the buoyancy anti-rotation switch mechanism of the riverbed sampler of the utility model applied to the sampling device;

[0017] Figure 2 yes Figure 1 A partial view of

[0018] Figure 3 is a partial view of the buoyancy anti-rotation switch mechanism from another angle;

[0019] Figure 4 It is a three-dimensional diagram of the anti-rotation structure;

[0020] Figure 5 It is a three-dimensional picture of the clamp head;

[0021] Figure 6 is a three-dimensional diagram of a switch member;

[0022] Figure 7It is a partial view of the chuck base on the bushing.

[0023] 1. Turntable; 2. Sampler; 3. Anti-rotation structure; 31. Disc body; 32. Protrusion; 4. Chuck; 41. Limiting part; 42. Compressed part; 43. Installation groove; 5. Chuck base; 51. Card board; 52. Perforation; 6. Switch part; 61. Float; 62. Pressure rod; 63. Connecting sleeve; 7. Bushing; 8. Hinge seat. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0025] Embodiment of the present invention:

[0026] As Figure 1 - Figure 2 shown, the buoyancy anti-rotation switch mechanism of the bed material sampler includes an anti-rotation structure 3 fixed on the turntable 1 and a chuck 4 selectively anti-rotationally engaged with the anti-rotation structure 3. The chuck 4 is floatingly assembled on the upper side of a bushing 7. As Figure 3 shown, the anti-rotation structure 3 includes a disc body 31 provided with a plurality of protrusions 32. The protrusions 32 are distributed at intervals along the circumference, and a card slot is formed between adjacent protrusions 32 for the chuck to be inserted to achieve anti-rotation engagement. Since the chuck can float radially along the bushing 7, the chuck can be inserted into the card slot of the anti-rotation structure 3 and can also be disengaged from the card slot.

[0027] As Figure 1 shown, during use, the anti-rotation structure 3 is welded and fixed on the turntable 1. A rotating shaft is vertically connected to the center of the turntable 1, and the rotating shaft is used to drive the turntable 1 to rotate according to a set rotation to switch the sampler 2 thereon. Figure 1 Six samplers 2 are shown in , which are arranged at intervals of 60 degrees. After being lowered into the water, the anti-rotation switch mechanism is used to prevent the turntable 1 from rotating randomly, ensuring that one of the samplers 2 can reliably perform sampling work; when the sampler 2 is lifted out of the water with the turntable 1, the anti-rotation switch mechanism no longer restricts the rotation of the turntable 1, so that it can be driven to rotate a certain angle to switch another sampler 2 that has not been sampled to the working position.

[0028] As Figure 3 and Figure 6As shown in the figure, a hinge seat 8 and a switch member 6 are provided on the bushing 7. The switch member 6 includes a float 61 and a pressure rod 62 connected to the float 61. The outer diameter of the pressure rod 62 is smaller than that of the float 61, and the length of the pressure rod 62 is smaller than that of the float 61. The float 61 is a hollow structure and can swing upward under the action of buoyancy when underwater. The middle part of the pressure rod 62 is hinged to the hinge seat 8, and the end of the pressure rod 62 away from the float 61 is pressed on the chuck. The float 61 can swing upward under the action of the buoyancy of water and press down the chuck, and after the buoyancy disappears, it swings downward by gravity and releases the chuck, and the chuck resets upward and disengages from the card slot.

[0029] As Figure 3 and 5 shown, the chuck 4 includes a limiting portion 41, a pressure-receiving portion 42, and a mounting groove 43. The limiting portion 41 is used to be stuck into the card slot, and the pressure-receiving portion 42 is in contact and cooperation with the pressure rod 62. The mounting groove 43 is located on the lower side of the chuck, and an elastic element is installed in the mounting groove 43, and the other end of the elastic element abuts against the outer peripheral surface of the bushing 7. In this example, the elastic element is a spring.

[0030] As Figure 3 and 7 shown, a chuck seat 5 is provided on the bushing 7. The chuck seat 5 includes two clamping plates 51, and the chuck is limited between the two clamping plates 51. Whether the chuck is moving up and down or at rest, it is limited between the two clamping plates 51. A through hole 52 is provided on the clamping plate 51 for the pressure rod 62 to pass through. The clamping plate 51 is a rectangular plate, and there is an arc-shaped opening at the bottom to better fit the outer peripheral surface of the bushing 7 for convenient welding. The through hole 52 is a rectangular hole. The through hole 52 not only allows the pressure rod 62 to pass through, but also limits the maximum upward swing angle of the pressure rod 62. After the chuck resets upward, it is still blocked by the pressure rod 62.

[0031] As Figure 6 shown, a connecting sleeve 63 is vertically provided in the middle of the pressure rod 62, and the connecting sleeve 63 is hinged to the hinge seat 8 through a hinge shaft. A shaft hole is provided on the hinge seat 8 for the hinge shaft to pass through.

[0032] There are two hinge seats 8, and the two hinge seats 8 are spaced apart in the circumferential direction of the bushing 7. The pressure rod 62 is selectively connected to one of the hinge seats 8, so that the float 61 of the switch member 6 faces the water flow, and it is ensured that the installation direction meets the requirements of remote control of the measuring station.

[0033] The working principle of the buoyancy anti-rotation switch mechanism of the bed material sampler is as follows:

[0034] The overall bed material sampler is connected to the existing hydrological measurement lead weight. After entering the water with the lead weight, the buoy 61 in the switch part is affected by the buoyancy force, the tail of the buoy 61 is lifted, the pressure rod 62 is pressed down, and the limiting part 41 of the chuck 4 is clamped into the card slot of the anti-rotation structure 3. At this time, the turntable 1 cannot rotate, ensuring that the sampler 2 can still work properly under the impact of the water flow. When the lead weight comes out of the water, the buoy 61 is affected by gravity, the tail of the buoy 61 drops, the pressure rod 62 is lifted, and the chuck 4 bounces upward under the action of the spring and disengages from the card slot of the anti-rotation structure 3. At this time, the turntable 1 can rotate to realize the rotation of the sampler 2.

Claims

1. Buoyancy anti-rotation switch mechanism of bed load sampler, characterized in that: It includes an anti-rotation structure for being fixed on a turntable and a chuck that selectively engages with the anti-rotation structure to prevent rotation. The chuck is floatingly assembled on the upper side of a bushing. The bushing is provided with a hinge seat and a switch member. The switch member includes a float and a pressure rod connected to the float. The pressure rod is hinged to the hinge seat, and the end of the pressure rod away from the float presses on the chuck. The float can swing upward under the buoyancy of water and press down the chuck, and after the buoyancy disappears, it swings downward by gravity and releases the chuck.

2. The buoyancy anti-rotation switch mechanism of the bed material sampler according to claim 1, characterized in that: The anti-rotation structure includes a disk body. The disk body is provided with a plurality of protrusions. The protrusions are distributed at intervals along the circumference, and a clamping groove is formed between adjacent protrusions for the chuck to be inserted into to achieve anti-rotation engagement.

3. The buoyancy anti-rotation switch mechanism of the bed material sampler according to claim 2, characterized in that: The chuck includes a limiting portion, a pressure-receiving portion, and a mounting groove. The limiting portion is used for being inserted into the clamping groove, the pressure-receiving portion is in contact and cooperation with the pressure rod, and the mounting groove is located on the lower side of the chuck. An elastic element is installed in the mounting groove and abuts against the outer peripheral surface of the bushing.

4. The buoyancy anti-rotation switch mechanism of the bed material sampler according to claim 3, characterized in that: A chuck seat is provided on the bushing. The chuck seat includes two clamping plates, and the chuck is limited between the two clamping plates.

5. The buoyancy anti-rotation switch mechanism of the bed material sampler according to claim 4, characterized in that: At least one of the clamping plates is provided with a through hole for the pressure rod to pass through.

6. The buoyancy anti-rotation switch mechanism of the bed material sampler according to claim 1, characterized in that: There are two hinge seats. The two hinge seats are distributed at intervals in the circumferential direction of the bushing, and the pressure rod is selectively connected to one of the hinge seats.

7. The buoyancy anti-rotation switch mechanism of the bed material sampler according to claim 6, characterized in that: A chuck seat is provided on the bushing. The chuck seat includes two clamping plates, and the chuck is limited between the two clamping plates. The clamping plates are provided with through holes for the pressure rod to pass through.

8. The buoyancy anti-rotation switch mechanism of the bed material sampler according to claim 1, characterized in that: The outer diameter of the pressure rod is smaller than the outer diameter of the float, and the length of the pressure rod is smaller than the length of the float.

9. The buoyancy anti-rotation switch mechanism of the bed material sampler according to claim 1, wherein: A connecting sleeve is vertically provided in the middle of the pressure rod, and the connecting sleeve is hinged to the hinge seat through a hinge shaft.

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