A sediment sampler for marine survey

Abstract

The present invention relates to the technical field of soil sampling, and in particular, to a marine survey sediment sampler. It comprises a sampling tube with a sampling port at the bottom and handles arranged on both sides of the top; a sealing mechanism is rotatably arranged at the bottom of the sampling tube, and a striking part is arranged at the top; the sealing mechanism seals the sampling port by rotating; the striking part comprises a top plate fixed at the top of the sampling tube, and a sliding rod located above the top plate, and a transmission member is arranged between the sliding rod and the sealing mechanism. In the marine survey sediment sampler, the downward movement depth of the sampling tube is sensed by a clutch control component, so that after the sampling tube moves down to a specified depth, the clutch control component changes the non-sliding connection state between the striking plate and the top plate into a sliding connection state by utilizing the reaction force of the ground, so that the force of the staff knocking on the striking plate next time is transmitted to the sealing mechanism, so that the sealing mechanism blocks the sampling port with the knocking force.

Description

Technical Field

[0001] The invention relates to the technical field of soil sampling, in particular to a sediment sampler for marine investigation. Background Art

[0002] Soil carbon sink survey refers to the process of scientifically and accurately estimating and evaluating the soil carbon sink capacity. The methods of soil carbon sink survey include model method, soil carbon balance method and maximum method. In soil carbon sink survey, deep soil sampling is involved.

[0003] Most existing samplers are cylindrical, and a sampling port for collecting soil is provided at the lower end of the sampler. The sampler is inserted into the ground to collect soil by knocking the sampling tube with a rubber hammer.

[0004] When sampling sediments of plants growing on the seashore (such as seaweed), since these plants grow in the intertidal zone and are affected by the tides, the underground soil is relatively loose and the collected soil is easy to fall from the sampling port at the lower end of the sampler.

[0005] In the related art, a blocking mechanism is provided at the sampling port. When the sampler is inserted into the ground, the sampling port is opened to allow soil to enter. When the sampler moves upward, the sampling port is closed to prevent soil from falling from the sampling port. However, the setting of the blocking mechanism also affects the efficiency of sampling. Specifically, when sampling, a rubber hammer is first used to knock the sampling tube so that the sampling tube moves down to a specified distance, and then the knocking of the sampling tube is stopped, and then the blocking mechanism is controlled.

[0006] It can be seen that while adding a plugging mechanism, the staff also needs to control the plugging mechanism separately after knocking the sampling tube, which increases the number of operations. Carbon sink sample collection requires multiple sampling in one area, so the increase in the number of single operations also affects the overall sampling efficiency. In addition, in order to ensure the plugging effect, the plugging mechanism is basically a conical structure, which means that the plugging mechanism needs to be rotated when opening and closing the sampling port. When the plugging mechanism is underground, it is surrounded by soil, which provides resistance to the plugging mechanism, making it difficult to rotate.

[0007] Therefore, how to use the striking force of the rubber hammer to drive the sampling tube downward and drive the sealing mechanism to work is an important issue faced in improving the sampling efficiency. Summary of the invention

[0008] The object of the present invention is to provide a marine survey sediment sampler to solve the problems raised in the above background technology.

[0009] To achieve the above purpose, a marine survey sediment sampler is provided, comprising a sampling tube with a sampling port at the bottom and handles at both sides of the top; a blocking mechanism is rotatably provided at the bottom of the sampling tube, and a striking portion is provided at the top; the blocking mechanism blocks the sampling port by rotating;

[0010] The impact part includes a top plate fixed on the top of the sampling tube, and a sliding rod located above the top plate, and a transmission member is arranged between the sliding rod and the blocking mechanism; and the sliding rod and the top plate have a sliding connection state and a non-sliding connection state; under normal conditions, the impact plate and the top plate are in a non-sliding connection state; the impact force applied by the external tool to the sliding rod acts on the sampling tube through the top plate, providing the sampling tube with power to move downward in the soil;

[0011] It also includes a clutch control component, which is used to switch the connection between the slide rod and the top plate from a non-sliding connection state to a sliding connection state through the reaction force of the ground when the sampling tube moves down to a preset depth, so that the knocking force applied by an external tool to the slide rod is transmitted to the sealing mechanism through the transmission member, forcing the sealing mechanism to close under force to seal the sampling port.

[0012] As a further improvement of the technical solution, a through hole is provided at the center of the top plate for the sliding rod to slide; a recess is provided at the portion of the sliding rod that penetrates into the through hole; a sliding cavity is provided inside the top plate, one end of which is connected to the through hole and the other end of which penetrates the outer ring of the top plate; a latch is slidably provided in the sliding cavity; a reset spring is provided between the top of the latch and the outer ring of the top plate to elastically connect the two; the latch is always inserted into the recess of the sliding rod under normal conditions by the elasticity of the reset spring, forcing the sliding rod and the top plate to be in a non-sliding connection state;

[0013] When one end of the latch is inserted into the recess of the slide bar, the other end protrudes out of the outer ring of the top plate, and an inclined groove is provided at the bottom of the protruding portion of the latch, so that the blocking mechanism drives the latch toward the outside of the top plate through the inclined groove, so that the latch is separated from the recess of the slide bar;

[0014] The bottom of the top plate is fixedly connected to the sampling tube via a support rod;

[0015] A striking plate is arranged on the top of the sliding rod.

[0016] As a further improvement of the technical solution, the clutch control assembly includes a longitudinally arranged telescopic rod, the telescopic rod is longitudinally slidably arranged on the outer ring of the sampling tube, and the top end of the telescopic rod is located at the bottom of the inclined groove.

[0017] As a further improvement of the technical solution, the telescopic rod comprises a sleeve and a straight rod which are slidably connected to each other, the outer ring of the sleeve is provided with a threaded knob, and the straight rod is locked by the threaded knob, so that the sliding connection between the straight rod and the sleeve is changed to a fixed connection; the top end of the straight rod extends to the bottom of the inclined groove, and the bottom end of the sleeve is connected to a blocking plate which is longitudinally slidably sleeved on the outer ring of the sampling tube;

[0018] When the straight rod moves upward, the straight rod moves upward and drives the latch pin to escape from the recess of the slide rod through the inclined groove, so that the slide rod and the top plate are in a sliding connection state.

[0019] As a further improvement of the technical solution, an energy storage spring is arranged between the bottom of the sleeve and the top of the blocking plate, the elastic force of the energy storage spring is greater than the elastic force of the return spring, and the sleeve and the blocking plate are longitudinally slidably connected.

[0020] As a further improvement of the technical solution, a mounting ring made of metal material is provided at the bottom of the sampling tube.

[0021] As a further improvement of the technical solution, the transmission member is a driven rod with a top end fixedly connected to the bottom of the struck plate and a bottom end extending to the bottom of the sampling tube.

[0022] As a further improvement of the technical solution, the blocking mechanism includes a plurality of baffles, which are arranged in a central annular array around the bottom end of the sampling tube, the top of the baffle is rotatably connected to the bottom end of the mounting ring, and the top of the baffle is provided with a pressure block with one end extending toward the outer ring of the mounting ring;

[0023] A plurality of baffles are closed to form a conical structure;

[0024] The outer ring of the mounting ring is longitudinally slidably provided with a pressure ring, the top of which is fixedly connected to the bottom end of the driven rod. When the pressure ring moves downward, the pressure ring applies a force to the baffle plate to rotate toward the center of the sampling tube through the pressure block.

[0025] As a further improvement of the technical solution, the blocking mechanism includes a first baffle and a second baffle located at the bottom of the mounting ring, and one end of the first baffle and the second baffle are both rotatably disposed in a fixed shaft disposed at the bottom of the mounting ring;

[0026] The first baffle and the second baffle are both C-shaped structures, and the first baffle and the second baffle are symmetrically arranged;

[0027] The driven rods are symmetrically arranged on both sides of the fixed shaft, and a wedge block is fixedly arranged at the bottom end of the driven rods;

[0028] Under normal conditions, the first baffle and the second baffle are both located between the outer ring and the inner ring at the bottom end of the mounting ring. When the driven rod moves downward, the driven rod drives the first baffle and the second baffle to rotate toward the center of the sampling port through the wedge block to seal the sampling port.

[0029] As a further improvement of the technical solution, the handles are symmetrically arranged on both sides of the sampling tube, and the proximal ends of the two handles are fixedly connected with clamp rings, and the two clamp rings are connected to the outer ring of the sampling tube by bolts;

[0030] The support rod is fixedly arranged on the top of the clamp ring, and the top plate is fixedly connected to the support rod on the top of one of the clamp rings;

[0031] The blocking plate is made of a flexible material, and the blocking plate is a C-shaped ring structure as a whole;

[0032] The mounting ring is detachably connected to the bottom of the sampling tube.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. In the marine survey sediment sampler, the clutch control component senses the downward movement depth of the sampling tube, so that after the sampling tube moves down to the specified depth, the clutch control component changes the non-sliding connection state between the impact plate and the top plate to a sliding connection state by using the reaction force of the ground, so that the force of the staff knocking on the impact plate next time is transmitted to the blocking mechanism, so that the blocking mechanism blocks the sampling port with the knocking force. In this way, the staff only needs to knock on the impact plate, and there is no need to change the operation mode after knocking, thereby reducing the number of operations of the staff and the closing efficiency of the blocking mechanism when facing the soil.

[0035] 2. In the marine survey sediment sampler, since the position of the blocking plate corresponds to the downward movement depth of the sampling tube, when the straight rod drives the pin through the inclined slot, the blocking plate cannot continue to move upward. At this time, when the sampling tube continues to move downward, since the blocking plate is located on the ground, it provides resistance for the sampling tube that continues to move downward, preventing the sampling tube from continuing to move downward significantly after reaching the downward movement depth, thereby preventing excessive sampling of the soil.

[0036] 3. In the marine survey sediment sampler, when facing harder soil, the blocking mechanism is set as two C-shaped baffles, and the soil is cut off by horizontal cutting of the two baffles, and the soil above the sampling port is blocked to prevent the soil in the sampling tube from falling. And the drive of the two baffles is still controlled by the clutch control component, so that the staff only needs to continue to knock on the impact plate without additional operation.

[0037] 4. In the marine survey sediment sampler, since the impact part, clutch control assembly and sealing mechanism are all located outside the sampling tube, the impact part, clutch control assembly and sealing mechanism can be detachably connected to the sampling tube, so that after the sampling is completed, the sampling tube can be removed and a new sampling tube can be installed from the bottom, so as to facilitate the storage of the sampling tube and save the cost of the sampler. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 It is a structural schematic diagram of the striking part of the present invention;

[0040] Figure 3 It is a structural schematic diagram of the clutch control assembly of the present invention;

[0041] Figure 4 The structure of the blocking mechanism of the present invention is shown in FIG. Figure 1 ;

[0042] Figure 5 The structure of the blocking mechanism of the present invention is shown in FIG. Figure 2 ;

[0043] Figure 6 The state diagram of the baffle of the present invention is shown in FIG. Figure 1 ;

[0044] Figure 7 The state diagram of the baffle of the present invention is shown in FIG. Figure 2 ;

[0045] Figure 8 It is a schematic diagram of disassembly and assembly of the sampling tube of the present invention;

[0046] Fig. 9 The structure of the blocking mechanism of the present invention is shown in FIG. Figure 3 ;

[0047] Fig.10 is a schematic structural diagram of a first baffle of the present invention;

[0048] Fig.11 The state diagram of the first baffle and the second baffle of the present invention is shown in FIG. Figure 1 ;

[0049] Fig.12 The state diagram of the first baffle and the second baffle of the present invention is shown in FIG. Figure 2 .

[0050] The meaning of each number in the figure is:

[0051] 100. sampling tube; 101. grip; 102. mounting ring; 103. groove; 104. clamp ring; 110. striking part; 111. top plate; 112. slide bar; 113. striking plate; 114. latch; 115. reset spring; 116. support rod; 120. clutch control assembly; 121. sleeve; 122. straight rod; 123. threaded knob; 124. energy storage spring; 125. blocking plate; 126. round tube; 130. blocking mechanism; 131. baffle; 132. pressure block; 133. rotating shaft; 134. pressure ring; 140. driven rod; 150. first baffle; 151. second baffle; 152. fixed shaft; 153. wedge block; 154. collar. DETAILED DESCRIPTION

[0052] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In the related art, a Chinese patent with a publication number of CN212300929U discloses a sampling device for silt and soil. The patent rotatably sets a plurality of baffles 131 at the sampling port, and a conical structure can be formed between the plurality of baffles 131, and the opening and closing of the sampling port is realized by the opening and closing of the baffles 131. However, the closing and resetting of the baffle 131 in the patent is performed by a spring. However, the resetting power provided by the spring to the baffle 131 is limited, which means that the patent can only close the sampling port in soft silt, and it is difficult to close the sampling port in non-silt soil, resulting in greater limitations of the sampling device.

[0056] The present invention provides a marine survey sediment sampler, such as Figure 1 As shown, the sampler includes a sampling tube 100. The sampling tube 100 is in a vertical state as a whole, and its bottom end is a sampling port. The top end can be closed or connected. The present invention does not limit this. Handles 101 are also provided on both sides of the top end to facilitate the staff to pull the sampling tube 100 upward through the handles 101. A blocking mechanism 130 is rotatably provided at the bottom end of the sampling tube 100 (i.e., the bottom of the sampling port), and a striking portion 110 is provided at the top end; the blocking mechanism 130 blocks the sampling port by rotating. Among them, as Figure 2 As shown, the impacted portion 110 includes a top plate 111 fixed to the top of the sampling tube 100, and a slide bar 112 located above the top plate 111, and a transmission member is arranged between the slide bar 112 and the blocking mechanism 130; and the slide bar 112 and the top plate 111 have a sliding connection state and a non-sliding connection state; under normal conditions, the slide bar 112 and the top plate 111 are in a non-sliding connection state, so that the impact force applied by an external tool (such as a rubber hammer) to the slide bar 112 acts on the sampling tube 100 through the top plate 111, providing the sampling tube 100 with power to move downward in the soil.

[0057] The sampler also includes a clutch control assembly 120, a portion of which is located outside the sampling tube 100, and is used to switch the connection between the impact plate 113 and the top plate 111 from a non-sliding connection state to a sliding connection state through the reaction force of the ground when the sampling tube 100 moves down to a preset depth, so that the impact force applied by an external tool to the slide rod 112 is transmitted to the blocking mechanism 130 through the transmission member, forcing the blocking mechanism 130 to close under force to block the sampling port.

[0058] like Figure 2As shown, a through hole is provided at the center of the top plate 111 for the sliding rod 112 to slide, and a recess is provided at the part of the sliding rod 112 that penetrates into the through hole, so that the cross section of the local part of the sliding rod 112 is in an I-shaped structure. A sliding cavity is provided inside the top plate 111, one end of which is connected to the through hole and the other end of which penetrates the outer ring of the top plate 111. A latch 114 is slidably provided in the sliding cavity, and a reset spring 115 is provided between the top of the latch 114 and the outer ring of the top plate 111 to elastically connect the two. The elasticity of the reset spring 115 makes the latch 114 always inserted into the recess of the sliding rod 112 under normal conditions, forcing the sliding rod 112 and the top plate 111 to be in a non-sliding connection state, so as to prevent the sliding rod 112 from moving downward.

[0059] Furthermore, the length of the latch 114 is greater than the length of the sliding cavity. That is, when one end of the latch 114 is inserted into the recess of the slide bar 112, the other end will protrude from the outer ring of the top plate 111. At the same time, the present invention provides an inclined groove at the bottom of the protruding portion of the latch 114, and the inclined groove is high near the middle of the latch 114 and low at the end, so that the blocking mechanism 130 drives the latch 114 to the outside of the top plate 111 through the inclined groove, so that the latch 114 is separated from the recess of the slide bar 112.

[0060] In the above, the bottom of the top plate 111 is fixed to the outer ring of the sampling tube 100 through the support rod 116 to achieve a fixed connection between the top plate 111 and the impact receiving part 110 .

[0061] At the same time, in order to increase the probability of the rubber hammer hitting the sliding rod 112 and avoid the rubber hammer from contacting the top plate 111, the present invention enlarges the top of the sliding rod 112. Specifically, a striking plate 113 is provided on the top of the sliding rod 112. The diameter of the striking plate 113 is not less than the diameter of the top plate 111, thereby preventing the rubber hammer from contacting the top plate 111.

[0062] like Figure 3 As shown, the clutch control assembly 120 includes a telescopic rod disposed longitudinally, the telescopic rod is disposed longitudinally and slidably on the outer ring of the sampling tube 100, and the top end of the telescopic rod is at the bottom of the inclined groove. Specifically:

[0063] In some embodiments, the telescopic rod includes a sleeve 121 and a straight rod 122 that are slidably connected to each other, and the outer ring of the sleeve 121 is provided with a threaded knob 123, and the straight rod 122 is locked by the threaded knob 123, so that the sliding connection between the straight rod 122 and the sleeve 121 is changed to a fixed connection. At the same time, the top of the straight rod 122 extends to the bottom of the inclined groove, and the bottom end of the sleeve 121 is connected to a blocking plate 125, and the blocking plate 125 is longitudinally slidably sleeved on the outer ring of the sampling tube 100. In this way, when the blocking plate 125 contacts the ground, if the sampling tube 100 continues to move downward, the blocking plate 125 will be pushed upward by the ground, thereby driving the sleeve 121 and the straight rod 122 to move upward, and the straight rod 122 moves upward and drives the latch 114 to disengage from the recess of the sliding rod 112 through the inclined groove, so that the sliding rod 112 and the top plate 111 are changed into a sliding connection state.

[0064] Furthermore, the straight rod 122 preferably slides through the handle 101 in a longitudinal manner, so that the straight rod 122 can be limited by the handle 101 so that the slide bar 112 can only move up and down.

[0065] In order to improve the efficiency of driving the latch 114, the present invention sets an energy storage spring 124 between the bottom of the sleeve 121 and the top of the blocking plate 125. The elastic force of the energy storage spring 124 is greater than the elastic force of the return spring 115, and the sleeve 121 and the blocking plate 125 are longitudinally slidably connected. Specifically, a round tube 126 is longitudinally set on the top of the blocking plate 125, and the round tube 126 is slidably connected with the sleeve 121, and then the energy storage spring 124 is set in the round tube 126. In this way, if the sleeve 121 and the straight rod 122 are in the process of pushing the chute, the rubber hammer also hits the slide bar 112, and the friction between the slide bar 112 and the latch 114 increases, so that the straight rod 122 cannot push the chute. After the energy storage spring 124 is provided, when the straight rod 122 is unable to push the inclined slot, the energy storage spring 124 will be compressed, thereby storing energy for the upward movement of the blocking plate 125. When the rubber hammer is separated from the sliding rod 112, the energy storage spring 124 rebounds to drive the straight rod 122 to move upward. At this time, the straight rod 122 pushes the inclined slot.

[0066] In addition, a mounting ring 102 is provided at the bottom of the sampling tube 100. The mounting ring 102 is made of metal material, which can prevent the bottom end of the sampling tube 100 from being damaged during the sampling process.

[0067] like Figure 5 As shown, the transmission member is a driven rod 140 whose top end is fixedly connected to the bottom of the striking plate 113 and whose bottom end extends to the bottom of the sampling tube 100 .

[0068] like Figure 4 and Figure 5As shown, in some embodiments, the blocking mechanism 130 includes a plurality of baffles 131, each of which is a triangular structure with a wide top and a narrow bottom. The plurality of baffles 131 are arranged in a central annular array around the bottom of the sampling tube 100, the top of the baffle 131 is rotatably connected to the bottom of the mounting ring 102 (specifically, a rotating shaft 133 is arranged at the bottom of the mounting ring 102, and the rotating shaft 133 is rotatably connected to the top of the baffle 131), and the top of the baffle 131 is provided with a pressure block 132 with one end extending toward the outer ring of the mounting ring 102. The plurality of baffles 131 form a conical structure when closed. A pressure ring 134 is longitudinally slidably arranged on the outer ring of the mounting ring 102, and the top of the pressure ring 134 is fixedly connected to the bottom end of the driven rod 140. When the pressure ring 134 moves downward, the pressure ring 134 applies a force to rotate the baffle 131 toward the center of the sampling tube 100 through the pressure block 132.

[0069] Furthermore, in order to prevent the pressure ring 134 from protruding from the outer ring of the mounting ring 102 and affecting the downward movement efficiency of the sampling tube 100, the thickness of the outer ring at the bottom of the mounting ring 102 is reduced in the present invention so that the thickness of the outer ring at the bottom of the mounting ring 102 is smaller than the thickness of the outer ring at the top, thereby forming a groove 103. At this time, the pressure ring 134 is slidably mounted on the outer ring of the groove 103, thereby preventing the pressure ring 134 from protruding from the outer ring of the mounting ring 102.

[0070] Moreover, there is friction between the pressure ring 134 and the groove 103, which is greater than the thrust exerted by the soil in the sampling tube 100 on the baffle 131. The friction can prevent the baffle 131 from resetting and opening when the pressure ring 134 drives the baffle 131 to close through the pressure block 132.

[0071] When the sampler of the present invention is used: first adjust the length between the sleeve 121 and the straight rod 122 so that the position of the blocking plate 125 is consistent with the downward movement depth of the sampling tube 100. For example, the sampling tube 100 is 2 meters long as a whole, and the sampling tube 100 needs to be moved down 1.5 meters for sampling, that is, the sampling tube 100 does not need to be moved down when it moves down to 1.5 meters. At this time, adjust the blocking plate 125 to the position corresponding to 1.5 meters of the sampling tube 100, and then lock the sleeve 121 and the straight rod 122 by the threaded knob 123 so that the top of the straight rod 122 is in the inclined groove.

[0072] Then, the sampling tube 100 is placed vertically on the ground, and then the multiple baffles 131 are rotated to open, and the pressure block 132 is located at the bottom end of the mounting ring 102. The mounting ring 102 restricts the pressure block 132 to prevent the baffle 131 from turning over to the outer ring of the mounting ring 102; then, the impact plate 113 is knocked with a rubber hammer, and the force exerted on the impact plate 113 is transmitted to the sampling tube 100 through the latch 114 and the top plate 111, so that the sampling tube 100 is subjected to the knocking force and moves downward. The downward movement state is specifically as follows: Figure 6shown.

[0073] Then, when the sampling tube 100 moves down to 1.5 meters, the bottom of the blocking plate 125 contacts the ground. Figure 7 As shown. When the staff strikes the striking plate 113 again, the sampling tube 100 moves downward, forcing the ground to push the blocking plate 125, and the blocking plate 125 moves upward to drive the sleeve 121 and the straight rod 122 to move upward, and the straight rod 122 moves upward to drive the latch 114 away from the slide bar 112 through the inclined groove. Then, the striking plate 113 is continuously struck, and the striking plate 113 is forced to move downward, driving the driven rod 140 to move downward, and the driven rod 140 moves downward to drive the pressure ring 134 to move downward, and the pressure ring 134 moves downward to drive the baffle 131 to rotate toward the center of the sampling tube 100 through the pressure block 132, and the multiple baffles 131 rotate and close to block the sampling port at the bottom of the sampling tube 100.

[0074] Here, the pressure ring 134 will move down until its inner circle contacts the end of the pressure block 132, so that the baffle 131 cannot be reset. The baffle 131 can only be reset and opened after the pressure ring 134 is moved up.

[0075] Finally, the sampling tube 100 can be pulled out through the handle 101 .

[0076] It is worth noting that the sliding between the blocking plate 125 and the sampling tube 100 has a friction force, and the friction force is greater than the gravity of the blocking plate 125, the sleeve 121 and the straight rod 122, that is, the blocking plate 125 will not slide down automatically.

[0077] That is, the clutch control component 120 senses the downward movement depth of the sampling tube 100, so that after the sampling tube 100 moves down to the specified depth, the clutch control component 120 changes the non-sliding connection state between the impact plate 113 and the top plate 111 into a sliding connection state by using the reaction force of the ground, so that the force of the staff hitting the impact plate 113 next time is transmitted to the blocking mechanism 130, so that the blocking mechanism 130 blocks the sampling port with the impact force. In this way, the staff only needs to hit the impact plate 113, and there is no need to change the operation mode after hitting, thereby reducing the number of operations of the staff and the closing efficiency of the blocking mechanism 130 when facing the soil.

[0078] In some environments, due to the looseness of the sludge, the sampling tube 100 will move downward significantly when hit once, which may cause the actual downward movement depth of the sampling tube 100 to be much greater than the preset downward movement depth. When the sampler of the present invention faces soft sludge, it can provide resistance for the sampling tube 100 when it reaches the preset downward movement depth. The details are as follows:

[0079] Since the position of the blocking plate 125 corresponds to the downward movement depth of the sampling tube 100, when the straight rod 122 drives the pin 114 through the inclined groove, the blocking plate 125 cannot continue to move upward. At this time, when the sampling tube 100 continues to move downward, since the blocking plate 125 is located on the ground, it provides resistance for the sampling tube 100 that continues to move downward, thereby preventing the sampling tube 100 from continuing to move downward significantly after reaching the downward movement depth, thereby preventing excessive sampling of the soil.

[0080] like Figure 9-12 As shown, in other embodiments, the blocking mechanism 130 includes a first baffle 150 and a second baffle 151 located at the bottom of the mounting ring 102, one end of the first baffle 150 and the second baffle 151 are both rotatably disposed in a fixed shaft 152 disposed at the bottom of the mounting ring 102, the first baffle 150 and the second baffle 151 are both C-shaped structures, and the first baffle 150 and the second baffle 151 are symmetrically disposed; the driven rod 140 is symmetrically disposed on both sides of the fixed shaft 152, and a wedge block 153 is fixedly disposed at the bottom end of the driven rod 140, and the inclined surface of the wedge block 153 faces the first baffle 150 and the second baffle 151. Under normal conditions, the first baffle 150 and the second baffle 151 are both located between the outer ring and the inner ring at the bottom end of the mounting ring 102. When the driven rod 140 moves downward, the driven rod 140 drives the first baffle 150 and the second baffle 151 to rotate toward the center of the sampling port through the wedge block 153 to block the sampling port.

[0081] During operation, when the impact plate 113 is struck and moves downward, the impact plate 113 drives the driven rod 140 to move downward, and the driven rod 140 drives the wedge block 153 to move downward. The wedge block 153 moves downward to push the first baffle 150 and the second baffle 151, so that the first baffle 150 rotates toward the center of the sampling port, and cuts off the soil at the bottom of the sampling port during the rotation, and then rotates to the bottom of the sampling port to block the soil above the sampling port to prevent the soil in the sampling tube 100 from falling.

[0082] It can be seen that when facing harder soil, the blocking mechanism 130 is set as two C-shaped baffles, and the soil is cut off by horizontal cutting of the two baffles, and the soil above the sampling port is blocked to prevent the soil in the sampling tube 100 from falling. The driving of the two baffles is still controlled by the clutch control assembly 120, so that the staff only needs to continue to knock on the striking plate 113 without performing additional operations.

[0083] In addition, the present invention further provides a collar 154 on the outer ring of the mounting ring 102, and the bottom end of the driven rod 140 slides through the collar 154. The collar 154 serves to limit the driven rod 140, thereby preventing the driven rod 140 from bending.

[0084] Moreover, when sampling a large area, it is usually necessary to sample at different locations in a region, and the sampled soil needs to be temporarily stored in the sampling tube 100, so a large number of sampling tubes 100 need to be used. Figure 8 As shown, the handles 101 are symmetrically arranged on both sides of the sampling tube 100, and the proximal ends of the two handles 101 are fixedly connected with clamp rings 104, and the two clamp rings 104 are connected to the outer ring of the sampling tube 100 by bolts; and the support rod 116 is fixedly arranged on the top of the clamp ring 104, and the top plate 111 is fixedly connected to the support rod 116 on the top of one of the clamp rings 104; the blocking plate 125 is made of flexible material, and the blocking plate 125 is a C-shaped ring structure as a whole; the mounting ring 102 is detachably connected to the bottom of the sampling tube 100, such as bolt connection, plug-in connection, etc.

[0085] In this way, when the sampling tube 100 completes sampling, first cancel the connection between the two clamp rings 104 by bolts, then the two clamp rings 104 can be removed, and then the mounting ring 102 is separated from the bottom of the sampling tube 100, and finally the blocking plate 125 is removed from the outer ring of the sampling tube 100.

[0086] It can be seen that since the striking part 110, the clutch control assembly 120 and the sealing mechanism 130 are all located outside the sampling tube 100, the striking part 110, the clutch control assembly 120 and the sealing mechanism 130 can be detachably connected to the sampling tube 100, so that after the sampling of the sampling tube 100 is completed, the sampling tube 100 can be removed and a new sampling tube 100 can be installed from the bottom, so as to facilitate the storage of the sampling tube 100 and save the cost of the sampler.

[0087] It should be understood that although the driven rod 140 is outside the sampling tube 100, when it moves down into the soil, the soil can restrict the driven rod 140 to prevent the driven rod 140 from bending during the process of driving the blocking mechanism 130. The driven rod 140 can also be made of high-strength materials.

[0088] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A marine survey sediment sampler, comprising a sampling tube (100) with a sampling port at the bottom and handles (101) arranged on both sides of the top; a blocking mechanism (130) is rotatably arranged at the bottom of the sampling tube (100), and a striking portion (110) is arranged at the top; the blocking mechanism (130) blocks the sampling port by rotating; and the characteristics are: The impacted portion (110) comprises a top plate (111) fixed to the top of the sampling tube (100), and a sliding rod (112) located above the top plate (111); a transmission member is provided between the sliding rod (112) and the blocking mechanism (130); and the sliding rod (112) and the top plate (111) are in a sliding connection state and a non-sliding connection state; under normal conditions, the impacted plate (113) and the top plate (111) are in a non-sliding connection state; the impact force applied by an external tool to the sliding rod (112) acts on the sampling tube (100) through the top plate (111), thereby providing the sampling tube (100) with power to move downward in the soil; A sliding cavity is provided inside the top plate (111), a latch (114) is slidably provided inside the sliding cavity, and an inclined groove is provided at the bottom of a protruding portion of the latch (114); It also includes a clutch control assembly (120), the clutch control assembly (120) including a telescopic rod arranged longitudinally, the telescopic rod being arranged longitudinally slidably on the outer ring of the sampling tube (100), and the top end of the telescopic rod being located at the bottom of the inclined groove; The clutch control assembly (120) is used to switch the state between the slide bar (112) and the top plate (111) from a non-sliding connection state to a sliding connection state through the reaction force of the ground when the sampling tube (100) moves down to a preset depth, so that the knocking force applied by an external tool to the slide bar (112) is transmitted to the blocking mechanism (130) through the transmission member, forcing the blocking mechanism (130) to close under force to block the sampling port; The telescopic rod comprises a sleeve (121) and a straight rod (122) which are slidably connected to each other. The outer ring of the sleeve (121) is provided with a threaded knob (123). The straight rod (122) is locked by the threaded knob (123), so that the connection between the straight rod (122) and the sleeve (121) is changed from a sliding connection to a fixed connection. The top end of the straight rod (122) extends to the bottom of the inclined groove, and the bottom end of the sleeve (121) is connected to a blocking plate (125) which is longitudinally slidably sleeved on the outer ring of the sampling tube (100).

2. The marine survey sediment sampler according to claim 1, characterized in that: A through hole is provided at the center of the top plate (111) for the sliding rod (112); a recess is provided at the portion of the sliding rod (112) that penetrates into the through hole; a sliding cavity is provided inside the top plate (111) with one end connected to the through hole and the other end penetrating the outer ring of the top plate (111); a return spring (115) is provided between the top of the latch (114) and the outer ring of the top plate (111) to elastically connect the two, and the elasticity of the return spring (115) enables the latch (114) to always be inserted into the recess of the sliding rod (112) under normal conditions, forcing the sliding rod (112) and the top plate (111) to be in a non-sliding connection state; When one end of the latch (114) is inserted into the recess of the slide bar (112), the other end protrudes out of the outer ring of the top plate (111), so that the blocking mechanism (130) drives the latch (114) toward the outside of the top plate (111) through the inclined groove, so that the latch (114) is separated from the recess of the slide bar (112); The bottom of the top plate (111) is fixedly connected to the sampling tube (100) via a support rod (116); A striking plate (113) is provided on the top of the sliding rod (112).

3. The marine survey sediment sampler according to claim 2, characterized in that: When the straight rod (122) moves upward, the straight rod (122) moves upward and drives the latch (114) to disengage from the recess of the slide rod (112) through the inclined groove, so that the slide rod (112) and the top plate (111) are in a sliding connection state.

4. The marine survey sediment sampler according to claim 3, characterized in that: An energy storage spring (124) is provided between the bottom of the sleeve (121) and the top of the blocking plate (125); the elastic force of the energy storage spring (124) is greater than the elastic force of the return spring (115); and the sleeve (121) and the blocking plate (125) are longitudinally slidably connected.

5. The marine survey sediment sampler according to claim 3, characterized in that: A mounting ring (102) made of metal material is provided at the bottom of the sampling tube (100).

6. The marine survey sediment sampler according to claim 5, characterized in that: The transmission member is a driven rod (140) whose top end is fixedly connected to the bottom of the impact plate (113) and whose bottom end extends to the bottom of the sampling tube (100).

7. The marine survey sediment sampler according to claim 6, characterized in that: The blocking mechanism (130) comprises a plurality of baffles (131), the plurality of baffles (131) being arranged in a central annular array around the bottom end of the sampling tube (100), the top of the baffle (131) being rotatably connected to the bottom end of the mounting ring (102), and a pressure block (132) having one end extending toward the outer ring of the mounting ring (102) being arranged at the top end of the baffle (131); A plurality of baffles (131) are closed together to form a conical structure; A pressure ring (134) is longitudinally slidably disposed on the outer ring of the mounting ring (102), and the top of the pressure ring (134) is fixedly connected to the bottom end of the driven rod (140). When the pressure ring (134) moves downward, the pressure ring (134) applies a force to the baffle (131) to rotate toward the center of the sampling tube (100) through the pressure block (132).

8. The marine survey sediment sampler according to claim 7, characterized in that: The blocking mechanism (130) comprises a first blocking piece (150) and a second blocking piece (151) located at the bottom of the mounting ring (102); one end of each of the first blocking piece (150) and the second blocking piece (151) is rotatably disposed within a fixed shaft (152) disposed at the bottom of the mounting ring (102); The first baffle (150) and the second baffle (151) are both C-shaped structures, and the first baffle (150) and the second baffle (151) are symmetrically arranged; The driven rod (140) is symmetrically arranged on both sides of the fixed shaft (152), and a wedge block (153) is fixedly arranged at the bottom end of the driven rod (140); In a normal state, the first baffle (150) and the second baffle (151) are both located between the outer ring and the inner ring at the bottom end of the mounting ring (102); when the driven rod (140) moves downward, the driven rod (140) drives the first baffle (150) and the second baffle (151) to rotate toward the center of the sampling port via the wedge block (153) to seal the sampling port.

9. The marine survey sediment sampler according to claim 5, characterized in that: The handles (101) are symmetrically arranged on both sides of the sampling tube (100); the proximal ends of the two handles (101) are fixedly connected to clamp rings (104); and the two clamp rings (104) are connected to the outer ring of the sampling tube (100) via bolts; The support rod (116) is fixedly arranged on the top of the clamp ring (104), and the top plate (111) is fixedly connected to the support rod (116) on the top of one of the clamp rings (104); The blocking plate (125) is made of a flexible material, and the blocking plate (125) is an overall C-shaped ring structure; The mounting ring (102) is detachably connected to the bottom of the sampling tube (100).

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