Device for preventing flushing fluid from flowing backwards

Abstract

The utility model relates to the technical field of drilling equipment, in particular to a device for preventing flushing fluid from flowing backwards, which comprises a plugging component, a plugging bin, a guide frame connected with the top of the plugging bin, a through hole formed in the top of the plugging bin, a sealing ring connected with the top of the plugging bin and a slope arranged at the top of the plugging bin. The connecting assembly comprises a connecting piece connected with the inner wall of the plugging bin, a fixing ring connected with one side of the connecting piece, and a threaded column fixedly connected with the top of the fixing ring. When drilling work is carried out, the plugging bin is connected to the outer side of the casing pipe in a sleeving mode, the plugging bin is beaten to the ground, flushing fluid can be prevented from flowing backwards into a drill hole, in this way, after drilling is finished, the casing pipe can be rapidly pulled up, and a user can conveniently and rapidly carry out secondary drilling work.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a device for preventing flushing liquid from flowing back. Background Art

[0002] Drilling construction is an engineering activity carried out underground or underwater, mainly used to explore geological structures, search for mineral resources, conduct groundwater exploration, and construct foundation projects.

[0003] During drilling construction, it is necessary to assemble the drilling rig, drill rod, drill bit, drilling fluid system, etc. to the location where drilling is required, and then start the drilling rig. The drilling rig drives the drill bit to rotate and gradually penetrates underground to perform drilling work. Here, in order to protect the drill bit, it is necessary to connect a casing to the outside of the drill bit to guide and protect the drill bit. At the same time, in order for the drill bit to perform drilling work smoothly, it is also necessary to continuously pour a large amount of flushing fluid into the casing to soften the ground.

[0004] The flushing fluid will flow out from the gap between the casing and the borehole, so part of the flushing fluid will backflow into the borehole. In order to prevent the flushing fluid from bringing stones and soil into the borehole, the operator often uses rags, hemp ropes, and inner tube rings to plug the space between the hole and the casing to reduce the flow space of the flushing fluid and prevent the flushing fluid from backflowing.

[0005] However, the above-mentioned materials are basically disposable and difficult to reuse after use. At the same time, they will continue to vibrate during drilling. These materials gradually become dense and firm under the vibration and extrusion. In this way, it will be difficult to pull out the casing after the drilling is completed. The operator needs to spend a lot of time to pull out the casing, which is not conducive to the operator's secondary drilling work. Utility Model Content

[0006] In view of the problems existing in the prior art, the present utility model is proposed.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a device for preventing backflow of flushing liquid, comprising:

[0008] A plugging assembly, comprising a plugging bin, a guide frame connected to the top of the plugging bin, a through hole opened at the top of the plugging bin, a sealing ring connected to the top of the plugging bin, and a slope arranged at the top of the plugging bin; and;

[0009] The connecting assembly comprises a connecting piece connected to the inner wall of the blocking bin, a fixing ring connected to one side of the connecting piece, and a threaded column fixedly connected to the top of the fixing ring.

[0010] As a preferred solution of the device for preventing backflow of flushing liquid of the utility model, the outer wall of the fixed ring is connected with a scraping assembly, and the scraping assembly includes a connecting column and a scraping rod connected to one side of the connecting column.

[0011] As a preferred solution of the device for preventing backflow of flushing liquid of the utility model, the inner wall of the connecting column is rotatably connected to the outer wall of the threaded column, and the bottom of the connecting column is in contact with the top of the fixing ring.

[0012] As a preferred solution of the device for preventing backflow of flushing liquid of the utility model, one side of the connecting column is connected to a first fixing block, and the bottom of the first fixing block is in contact with the top of the fixing ring.

[0013] As a preferred solution of the device for preventing backflow of flushing liquid of the utility model, the outer wall of the fixing ring is connected with a linkage assembly, and the linkage assembly includes a driving wheel and a rubber belt sleeved on the outer wall of the driving wheel.

[0014] As a preferred solution of the device for preventing backflow of flushing liquid of the utility model, the bottom of the driving wheel is rotatably connected to the inner wall of the fixing ring, and a rotating handle is arranged on the top of the driving wheel.

[0015] As a preferred solution of the device for preventing backflow of flushing liquid of the utility model, the top of the fixed ring is rotatably connected to two symmetrical pre-tightening wheels, and the outer walls of the two pre-tightening wheels are in contact with the outer wall of the rubber belt.

[0016] As a preferred solution of the device for preventing backflow of flushing liquid of the utility model, wherein: a second fixing block is arranged on the outer wall of the rubber belt, and one side of the second fixing block is connected to one side of the first fixing block.

[0017] As a preferred solution of the device for preventing backflow of flushing liquid of the utility model, the top of the rubber belt contacts the top of the fixing ring, and the bottom of the second fixing block contacts the top of the fixing ring.

[0018] As a preferred solution of the device for preventing backflow of flushing liquid of the utility model, the two pre-tightening wheels and the driving wheel are distributed in a triangle.

[0019] The beneficial effects of the utility model are as follows: when drilling, by sleeve-fitting the plugging chamber onto the outside of the casing and hammering the plugging chamber onto the ground, flushing fluid can be prevented from flowing back into the borehole. In this way, after the drilling is completed, the casing can be quickly pulled out, making it convenient for the user to quickly carry out secondary drilling work.

[0020] At the same time, after the casing is inserted into the through hole, rotating the handle can make the scraper rod fit the outer wall of the casing, so that when the casing is pulled upward, the scraper rod can scrape off the dirt on the casing, thereby facilitating the user to quickly clean the dirt on the casing, so that the casing can quickly perform secondary drilling work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2 It is a connection diagram of the blocking component and the connecting component in the utility model.

[0024] Figure 3 It is a schematic diagram of the structure of the blocking component in the utility model.

[0025] Figure 4 It is a connection diagram of the connecting component, the scraping component and the linkage component in the utility model.

[0026] Figure 5 It is a structural schematic diagram of the connection component in the utility model.

[0027] Figure 6 It is a structural schematic diagram of the scraping component in the utility model.

[0028] Figure 7 It is a structural schematic diagram of the linkage component in the utility model. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1

[0033] Reference Figure 1-2 , which is the first embodiment of the utility model, provides a device for preventing backflow of flushing liquid, comprising:

[0034] The plugging assembly 100 includes a plugging chamber 101, a guide frame 102 connected to the top of the plugging chamber 101, a through hole 103 opened at the top of the plugging chamber 101, a sealing ring 104 connected to the top of the plugging chamber 101, and a slope 105 arranged at the top of the plugging chamber 101, wherein the guide frame 102 has three sides, and the lowest part of the slope 105 faces the side where the guide frame 102 is not arranged;

[0035] The blocking chamber 101 and the guide frame 102 are connected together by welding. Two sealing rings 104 are provided. The two sealing rings 104 are respectively located at the top and the bottom of the blocking chamber 101, and they are connected together by bolts.

[0036] Meanwhile, the diameter of the through hole 103 is 108 mm, and the diameter of the sealing ring 104 is also 108 mm.

[0037] The connecting assembly 200 includes a connecting piece 201 connected to the inner wall of the plugging chamber 101, a fixing ring 202 connected to one side of the connecting piece 201, and a threaded column 203 fixedly connected to the top of the fixing ring 202, wherein the fixing ring 202 is a circular ring with a hole in the middle, and the connecting piece 201 is welded on the front, back, left, and right sides of the fixing ring 202, and the connecting piece 201 is connected to the plugging chamber 101 through a nut;

[0038] There are five threaded columns 203 , and nuts are disposed on the five threaded columns 203 .

[0039] In summary, before drilling, it is necessary to fix the fixing ring 202 to the blocking chamber 101 by bolts, and then place the blocking chamber 101 at the drilling site. At this time, the blocking chamber 101 is pressed or hammered by heavy objects so that there will be no gap at the bottom of the blocking chamber 101. Then the casing is passed through the through hole 103 and the sealing ring 104. The fixing ring 202 will guide the casing to move in the correct direction. In this way, when drilling, the blocking chamber 101 will block the flushing liquid from flowing out. At this time, the water level will gradually rise and finally flow out from the through hole 103. The flushing liquid will flow to the ground along the slope 105. At this time, the blocking chamber 101 can block the external water flow from entering the borehole. In this way, after the drilling is completed, the casing can be quickly pulled out, which is convenient for the user to quickly carry out secondary drilling work.

[0040] Example 2

[0041] Reference Figure 1 to Figure 7 , which is the second embodiment of the utility model, and this embodiment is based on the previous embodiment, except that,

[0042] The outer wall of the fixed ring 202 is connected to a scraping assembly 300, which includes a connecting column 301 and a scraping rod 302 connected to one side of the connecting column 301, wherein the number of the connecting column 301 and the scraping rod 302 is five, and each scraping rod 302 is provided with an arc, and the five scraping rods 302 are distributed up and down in a trapezoidal shape.

[0043] The inner wall of the connecting column 301 is rotatably connected to the outer wall of the threaded column 203 , and the bottom of the connecting column 301 is in contact with the top of the fixing ring 202 , wherein the threaded column 203 is rotatably connected to the connecting column 301 via a bearing.

[0044] A first fixing block 303 is connected to one side of the connecting column 301 , and the bottom of the first fixing block 303 is in contact with the top of the fixing ring 202 , wherein the first fixing block 303 and the connecting column 301 are connected together by welding.

[0045] The outer wall of the fixing ring 202 is connected with a linkage assembly 400, which includes a driving wheel 401 and a rubber belt 404 sleeved on the outer wall of the driving wheel 401, wherein the driving wheel 401 is made of silicon carbide, and the rubber belt 404 is made of red butyl rubber, and the friction coefficient between the two is large, and the rubber belt 404 can be driven to move when the driving wheel 401 rotates;

[0046] The bottom of the driving wheel 401 is rotatably connected to the inner wall of the fixing ring 202, and a rotating handle 402 is provided on the top of the driving wheel 401, wherein a convex block with a "T"-shaped cross-sectional area is provided at the bottom of the driving wheel 401, and a through hole is opened at a corresponding position of the fixing ring 202, and the smaller diameter of the convex block is located in the through hole, so that the driving wheel 401 is engaged with the fixing ring 202 and can also rotate;

[0047] The rotating handle 402 and the driving wheel 401 are fixed together by adhesion, and the driving wheel 401 and the rubber belt 404 can be driven to rotate by rotating the rotating handle 402 .

[0048] The top of the fixing ring 202 is rotatably connected to two symmetrical pre-tightening wheels 403, the outer walls of the two pre-tightening wheels 403 are in contact with the outer wall of the rubber belt 404, wherein the diameter of the pre-tightening wheel 403 is smaller than the diameter of the driving wheel 401, and the two driving wheels 401 are symmetrical to each other;

[0049] A second fixed block 405 is provided on the outer wall of the rubber belt 404, and one side of the second fixed block 405 is connected to one side of the first fixed block 303, wherein the second fixed block 405 and the first fixed block 303 are fixedly connected to each other by bolts, and when the second fixed block 405 is connected to the first fixed block 303, rotating the driving wheel 401 can drive the second fixed block 405 and the first fixed block 303 to move, thereby driving the connecting column 301 and the scraper rod 302 to swing.

[0050] The top of the rubber belt 404 contacts the top of the fixing ring 202 , and the bottom of the second fixing block 405 contacts the top of the fixing ring 202 , wherein the rubber belt 404 is distributed in a pentagon shape on the fixing ring 202 .

[0051] The two pre-tensioning wheels 403 and the driving wheel 401 are arranged in a triangle, wherein the two pre-tensioning wheels 403 are located on both sides of the driving wheel 401 , and the rubber belt 404 passes through the two pre-tensioning wheels 403 and the driving wheel 401 in sequence in an “S” shape.

[0052] In summary, after the casing is inserted into the through hole 103, the blocking chamber 101 is lifted, and the handle 402 is rotated to drive the driving wheel 401 to rotate. At this time, the rubber belt 404 will drive the second fixed block 405 and the first fixed block 303 to move, so that the scraper rod 302 swings in the direction of the casing, and then the blocking chamber 101 is slid to the ground. In this way, when the casing is pulled up, the scraper rod 302 can scrape the soil on the casing, so that the user can quickly clean the soil on the casing, so that the casing can quickly perform secondary drilling work.

[0053] Example 3

[0054] Reference Figure 1 to Figure 7 , which is the third embodiment of the utility model, and this embodiment is based on the previous embodiment, except that,

[0055] The outer wall of the fixing ring 202 is connected with a linkage assembly 400, which includes a driving wheel 401 and a rubber belt 404 sleeved on the outer wall of the driving wheel 401. The difference is that the rubber belt 404 here can be replaced with a steel cable, and the driving wheel 401 can be replaced with a corresponding traction wheel according to the diameter of the steel cable. However, it should be noted that the traction wheel needs sufficient pre-tightening force to drive the steel cable to move.

[0056] Two symmetrical pre-tensioning wheels 403 are rotatably connected to the top of the fixing ring 202, and the outer walls of the two pre-tensioning wheels 403 are in contact with the outer wall of the rubber belt 404. The difference is that when the rubber belt 404 is replaced with a steel cable, the pre-tensioning wheel 403 should also be replaced with a corresponding roller. At the same time, in order to ensure that the steel cable has sufficient pre-tensioning force, the roller needs to be adjusted toward the direction of the through hole 103.

[0057] In summary, after the driving wheel 401 is replaced by the traction wheel, the traction wheel is still driven to rotate by turning the handle 402. At this time, the traction wheel drives the steel cable to move, so that the scraper rod 302 moves toward the casing. Similarly, after the casing is pulled out, the scraper rod 302 can clean the dirt on the casing.

[0058] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0059] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0060] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A device for preventing backflow of flushing liquid, characterized in that: include, A plugging assembly (100), comprising a plugging chamber (101), a guide frame (102) connected to the top of the plugging chamber (101), a through hole (103) opened at the top of the plugging chamber (101), a sealing ring (104) connected to the top of the plugging chamber (101), and a slope (105) arranged at the top of the plugging chamber (101); and; The connection assembly (200) comprises a connection piece (201) connected to the inner wall of the blocking chamber (101), a fixing ring (202) connected to one side of the connection piece (201), and a threaded column (203) fixedly connected to the top of the fixing ring (202).

2. The device for preventing backflow of flushing liquid according to claim 1, characterized in that: The outer wall of the fixing ring (202) is connected to a scraping assembly (300), and the scraping assembly (300) comprises a connecting column (301) and a scraping rod (302) connected to one side of the connecting column (301).

3. The device for preventing backflow of flushing liquid as claimed in claim 2, characterized in that: The inner wall of the connecting column (301) is rotatably connected to the outer wall of the threaded column (203), and the bottom of the connecting column (301) is in contact with the top of the fixing ring (202).

4. The device for preventing backflow of flushing liquid as claimed in claim 2, characterized in that: One side of the connecting column (301) is connected to a first fixing block (303), and the bottom of the first fixing block (303) is in contact with the top of the fixing ring (202).

5. The device for preventing backflow of flushing liquid as claimed in claim 4, characterized in that: The outer wall of the fixing ring (202) is connected to a linkage assembly (400), and the linkage assembly (400) comprises a driving wheel (401) and a rubber belt (404) sleeved on the outer wall of the driving wheel (401).

6. The device for preventing backflow of flushing liquid as claimed in claim 5, characterized in that: The bottom of the driving wheel (401) is rotatably connected to the inner wall of the fixing ring (202), and a rotating handle (402) is provided on the top of the driving wheel (401).

7. The device for preventing backflow of flushing liquid as claimed in claim 6, characterized in that: The top of the fixing ring (202) is rotatably connected to two symmetrical pre-tightening wheels (403), and the outer walls of the two pre-tightening wheels (403) are in contact with the outer wall of the rubber belt (404).

8. The device for preventing backflow of flushing liquid as claimed in claim 7, characterized in that: A second fixing block (405) is provided on the outer wall of the rubber belt (404), and one side of the second fixing block (405) is connected to one side of the first fixing block (303).

9. The device for preventing backflow of flushing liquid as claimed in claim 8, characterized in that: The top of the rubber belt (404) contacts the top of the fixing ring (202), and the bottom of the second fixing block (405) contacts the top of the fixing ring (202).

10. The device for preventing backflow of flushing liquid according to claim 9, characterized in that: The two preload wheels (403) and the driving wheel (401) are distributed in a triangle.

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