A cementing device

Abstract

This utility model provides a cementing device, belonging to the field of cementing engineering technology. The cementing device provided by this utility model includes a marker rod, a marker bottom, a cementing head, and a cementing sleeve. The marker rod has a first injection hole inside. The marker bottom is located at the bottom of the marker rod and has a second injection hole inside. The cementing head is located at the top of the marker rod and has a valve body inside. The cementing sleeve is located in the middle of the marker rod and has a plug inside. The valve body has an insertion post on its end face. The plug has an insertion hole on its end face and a slot on its outer surface. The slot has a first inclined surface, and the insertion hole communicates with the first inclined surface. A stopper is inserted into the outer wall of the cementing sleeve. One end of the stopper has a second inclined surface that matches the first inclined surface. One end of the stopper is inserted into the slot, and the first and second inclined surfaces abut against each other. This cementing device prevents a large amount of cement slurry from flowing out of the drainage hole into the external casing during cement slurry injection.

Description

Technical Field

[0001] This utility model belongs to the field of cementing engineering technology, and more specifically, relates to a cementing device. Background Technology

[0002] Bedrock markers serve as elevation reference points in ground settlement monitoring networks. By penetrating the loose overburden and fixing the marker base to a stable bedrock layer, they provide a reliable benchmark for settlement monitoring in major projects and regions. As a reference point for ground settlement monitoring, surface settlement is measured using a marker fixed to stable bedrock, making it suitable for areas with loose strata. The accuracy of its measurement directly affects the reliability of ground settlement monitoring.

[0003] Currently, Chinese Patent Publication No. CN208009387U discloses a bedrock marker bottom cementing device. When using the cementing device provided by the above patent and injecting cement slurry, the cement slurry, under the pumping of the grouting pump, gives the piston a large downward pressure, causing the piston to descend. Especially when the pressure of the grouting pump is relatively high, the piston will move directly down to the lower side of the drainage and slurry discharge hole, and the cement slurry can flow directly from the drainage and slurry discharge hole into the external casing, resulting in a large accumulation of cement slurry on the nylon plate. This can delay the cementing progress or even cause the cementing to fail.

[0004] Based on this, the applicant applies to design a cementing device. Utility Model Content

[0005] The purpose of this invention is to provide a cementing device to solve the technical problem in the prior art where the piston moves directly to the lower side of the drainage and slurry discharge hole during cement grouting, thus delaying the cementing progress.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A cementing device is provided, comprising a marker rod, a marker bottom, a cementing head, and a cementing sleeve; a first injection hole is provided inside the marker rod; the marker bottom is located at the bottom of the marker rod and has a second injection hole inside; the cementing head is located at the top of the marker rod and has a valve body inside; the cementing sleeve is located in the middle of the marker rod and has a plug inside; wherein, a pin is provided on the end face of the valve body; an insertion hole is opened on the end face of the plug, and a slot is opened on the outer surface of the plug, with a first inclined surface inside the slot, and the insertion hole communicating with the first inclined surface; a stopper is inserted into the outer wall of the cementing sleeve, one end of the stopper has a second inclined surface matching the first inclined surface, one end of the stopper is inserted into the slot, and the first inclined surface abuts against the second inclined surface.

[0007] In one possible implementation, based on the above technical solutions, the blocking fan includes a plug and a fan blade. The plug has a hinge portion at one end away from the second inclined surface. The hinge portion has a hinge shaft and an anti-fall platform. The end of the fan blade has a hinge hole. The hinge shaft is inserted into the hinge hole, and the fan blade rests on the anti-fall platform.

[0008] In one possible implementation, based on the above technical solutions, cement aerogel is provided on the bottom side of the fan blade.

[0009] In one possible implementation, based on the above technical solutions, the bottom side of the fan blade is provided with a top groove, one side wall of the top groove is provided with an arc-shaped protrusion, the outer surface of the cementing sleeve is provided with a protruding post, the end of the protruding post is provided with a hemisphere, the protruding post is inserted into the top groove, and the hemisphere abuts against the arc-shaped protrusion.

[0010] In one possible implementation, based on the above technical solutions, the valve body is provided with a cone-shaped body, a sealing ring is provided on the outer surface of the cone-shaped body, a third injection hole and a sealing cone hole are provided inside the plug body, the third injection hole and the sealing cone hole are connected, and a sealing groove matching the sealing ring is provided on the inner wall of the sealing cone hole.

[0011] In one possible implementation, based on the above technical solutions, a positioning element is provided on the side wall of the cementing head, and a positioning hole is provided on the side wall of the valve body, with the end of the positioning element inserted into the positioning hole.

[0012] In one possible implementation, in conjunction with the above technical solutions, the sidewall of the cementing head is further provided with a first grouting head and a second grouting head, the first grouting head being located at the upper part of the valve body and the second grouting head being located at the lower part of the valve body.

[0013] In one possible implementation, based on the above technical solutions, the bottom of the cementing sleeve is provided with an adjusting nut, the adjusting nut has a fourth injection hole inside, and a first elastic element is provided between the adjusting nut and the plug; a drainage and slurry discharge hole is provided at the corresponding position of the plug on the side wall of the cementing sleeve; a first pressure plate and a second pressure plate are provided on the outer surface of the cementing sleeve, and a nylon plate is provided between the first pressure plate and the second pressure plate.

[0014] In one possible implementation, based on the above technical solutions, the socket is provided with a sponge.

[0015] In one possible implementation, based on the above technical solutions, a sliding groove is provided on the inner wall of the rod, and a slider matching the sliding groove is provided on the outer surface of the valve body, so that the valve body will not rotate when it moves down.

[0016] The beneficial effects of the cementing device provided by this utility model are as follows: Compared with the prior art, the cementing device provided by this utility model has an insert post on the end face of the valve body, an insertion hole on the end face of the plug body, and a slot on the outer surface of the plug body. The slot has a first inclined surface, and the insertion hole is connected to the first inclined surface. A stop fan is inserted into the outer wall of the cementing sleeve. One end of the stop fan has a second inclined surface that matches the first inclined surface. One end of the stop fan is inserted into the inclined surface groove, and the first inclined surface abuts against the second inclined surface. When injecting cement slurry, since one end of the stop fan is inserted into the slot, it can limit the plug body. Therefore, even if the pressure of the grouting pump is very high, the plug body will not move down. When injecting replacement slurry, the replacement slurry pushes the valve body down, and then the insert post is inserted into the insertion hole to impact the second inclined surface, causing the end of the stop fan to disengage from the slot, and the plug body can then move down. This cementing device avoids the situation where a large amount of cement slurry flows out from the drainage hole into the external casing when injecting cement slurry. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a cementing device provided in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a cementing head for a cementing device provided in an embodiment of the present utility model;

[0020] Figure 3 A schematic diagram of the structure of a cementing sleeve for a cementing device provided in an embodiment of this utility model;

[0021] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0022] Figure 5 for Figure 3 Enlarged structural diagram at point B;

[0023] Figure 6 A schematic diagram of the structure of a baffle fan in a cementing device provided in an embodiment of this utility model;

[0024] Figure 7 A schematic diagram of the structure of a cementing device's baffle fan from another perspective, provided as an embodiment of this utility model;

[0025] Figure 8A schematic diagram of the structure of a cementing device insert block provided in an embodiment of this utility model;

[0026] Figure 9 This is a structural diagram of a cementing device in use, provided as an embodiment of the present invention.

[0027] The labels for the attached figures are as follows:

[0028] 100, benchmark; 110, first injection hole; 120, sliding groove; 200, benchmark bottom;

[0029] 210, Second injection hole; 300, Cementing head; 310, Valve body; 311, Insertion string; 312, Conical body;

[0030] 3121, Sealing ring; 313, Positioning hole; 314, Sliding block; 320, First grouting head;

[0031] 330, Second grouting head; 340, Positioning component; 400, Cementing sleeve; 410, Plug; 411, Insertion hole;

[0032] 412, Slot; 413, Third Injection Hole; 414, Sealing Cone Hole; 4141, Sealing Groove;

[0033] 415. Sponge; 420. Protruding post; 421. Hemisphere; 430. Adjusting nut; 431. Fourth injection hole;

[0034] 440. First elastic element; 450. Drainage and slurry discharge hole; 460. First pressure plate; 470. Second pressure plate;

[0035] 480, Nylon sheet; 500, Baffle fan; 510, Second inclined plane; 520, Insert block; 530, Fan blade;

[0036] 531. Top groove; 532. Arc-shaped protrusion; 540. Hinge shaft; 550. Anti-fall platform;

[0037] 560, Cement aerogel; 600, External casing; 700, Bedrock bare hole. Detailed Implementation

[0038] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of this application, not all of them. The specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] It should be further explained that the accompanying drawings and embodiments of this utility model mainly describe the concept of this utility model. Based on this concept, some specific forms and settings of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this utility model, they can implement the above-mentioned specific forms and settings in a well-known manner.

[0040] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0041] The directional terms "inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0043] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0044] The present invention will now describe a cementing device.

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a cementing device, including a marker 100, a marker bottom 200, a cementing head 300, and a cementing sleeve 400; the marker 100 has a first injection hole 110 inside; the marker bottom 200 is located at the bottom of the marker 100 and has a second injection hole 210 inside; the cementing head 300 is located at the top of the marker 100 and has a valve body 310 inside; the cementing sleeve 400 is located in the middle of the marker 100 and has a plug body 410 inside; its In the middle, the valve body 310 has a plug 311 on its end face; the plug body 410 has a hole 411 on its end face and a slot 412 on its outer surface. The slot 412 has a first inclined surface and the hole 411 is connected to the first inclined surface; a baffle 500 is inserted into the outer wall of the cementing sleeve 400. One end of the baffle 500 has a second inclined surface 510 that matches the first inclined surface. One end of the baffle 500 is inserted into the slot 412 and the first inclined surface and the second inclined surface 510 abut against each other.

[0046] This utility model provides a cementing device. Compared with the prior art, the cementing device provided by this utility model has an insertion post 311 on the end face of the valve body 310, an insertion hole 411 on the end face of the plug body 410, and a slot 412 on the outer surface of the plug body 410. The slot 412 has a first inclined surface, and the insertion hole 411 communicates with the first inclined surface. A stop fan 500 is inserted into the outer wall of the cementing sleeve 400. One end of the stop fan 500 has a second inclined surface 510 that matches the first inclined surface. One end of the stop fan 500 is inserted into the inclined surface groove, and the first inclined surface and the second inclined surface 510 abut against each other. During cement grouting, since one end of the baffle 500 is inserted into the slot 412, it can limit the plug 410. Therefore, even if the pressure of the grouting pump is very high, the plug 410 will not move downward. When the replacement grout is injected, the replacement grout pushes the valve body 310 downward. Then the insert 311 is inserted into the insertion hole 411 and impacts the second inclined surface 510, causing the end of the baffle 500 to disengage from the slot 412, and the plug 410 can then move downward. This cementing device avoids the situation where a large amount of cement grout flows out from the drainage hole 450 into the external casing 600 during cement grouting.

[0047] like Figure 6 , Figure 7 and Figure 8As shown, in a specific embodiment of a cementing device provided in this utility model, the baffle 500 includes an insert block 520 and a fan blade 530. The insert block 520 has a hinge portion at one end away from the second inclined surface 510. The hinge portion has a hinge shaft 540 and an anti-fall platform 550. The end of the fan blade 530 has a hinge hole. The hinge shaft 540 is inserted into the hinge hole, and the fan blade 530 rests on the anti-fall platform 550.

[0048] It should be noted that the fan blade 530 can rotate around the hinge shaft 540, and in order to prevent the fan blade 530 from falling, a fall prevention platform 550 is specially set on the insert block 520. Before the cement grout is poured, the fan blade 530 is placed on the fall prevention platform 550.

[0049] like Figure 7 As shown, in a specific embodiment of a cementing device provided in this utility model, cement aerogel 560 is provided on the bottom side of the fan blade 530.

[0050] Specifically, when cement slurry reaches the fan blade 530, the cement aerogel 560 will generate a huge buoyancy, which will cause the entire fan blade 530 to rotate upward relative to the insert block 520, facilitating the flow of cement slurry.

[0051] like Figure 4 and Figure 7 As shown, in a specific embodiment of the cementing device provided in this utility model, the bottom side of the fan blade 530 is provided with a top groove 531, one side wall of the top groove 531 is provided with an arc-shaped protrusion 532, the outer surface of the cementing sleeve 400 is provided with a protruding post 420, the end of the protruding post 420 is provided with a hemisphere 421, the protruding post 420 is inserted into the top groove 531, and the hemisphere 421 abuts against the arc-shaped protrusion 532.

[0052] Furthermore, to ensure that the retaining fan 500 does not easily detach from the slot 412 during cement grouting, a protruding post 420 is provided on the outer surface of the cementing sleeve 400, and a top groove 531 is provided on the bottom side of the fan blade 530. The hemisphere 421 on the protruding post 420 abuts against the arc protrusion 532 in the top groove 531, thereby achieving the purpose of limiting the retaining fan 500 by the protruding post 420. In addition, when the insert post 311 is inserted into the insertion hole 411 and impacts the second inclined surface 510, the retaining fan 500 will move outward because the arc protrusion 532 and the hemisphere 421 are in curved contact. The fan blade 530 will rotate to ensure that the end of the retaining fan 500 can detach from the slot 412.

[0053] like Figure 2 , Figure 3 and Figure 5As shown, in a specific embodiment of a cementing device provided in this utility model, a cone-shaped body 312 is provided on the valve body 310, a sealing ring 3121 is provided on the outer surface of the cone-shaped body 312, a third injection hole 413 and a sealing cone hole 414 are provided inside the plug body 410, the third injection hole 413 and the sealing cone hole 414 are connected, and a sealing groove 4141 matching the sealing ring 3121 is provided on the inner wall of the sealing cone hole 414.

[0054] To ensure that no grout flows into the sealing cone hole 414 during grout injection, a sealing ring 3121 is provided on the outer surface of the cone 312. A sealing groove 4141 matching the sealing ring 3121 is opened on the inner wall of the sealing cone hole 414. When the cone 312 and the sealing cone hole 414 are in contact, the sealing ring 3121 will sink into the sealing groove 4141, ensuring the airtightness between them.

[0055] like Figure 2 As shown, in a specific embodiment of a cementing device provided in this utility model, a positioning member 340 is provided on the side wall of the cementing head 300, and a positioning hole 313 is provided on the side wall of the valve body 310, with the end of the positioning member 340 inserted into the positioning hole 313.

[0056] like Figure 2 As shown, in a specific embodiment of the cementing device provided in this utility model, a first grouting head 320 and a second grouting head 330 are also provided on the side wall of the cementing head 300. The first grouting head 320 is located on the upper part of the valve body 310, and the second grouting head 330 is located on the lower part of the valve body 310.

[0057] like Figure 3 As shown in the embodiment of the cementing device provided in this utility model, the bottom of the cementing sleeve 400 is provided with an adjusting nut 430, the adjusting nut 430 is provided with a fourth injection hole 431, and a first elastic member 440 is provided between the adjusting nut 430 and the plug 410; a drainage and slurry discharge hole 450 is provided at the corresponding position of the plug 410 on the side wall of the cementing sleeve 400; a first pressure plate 460 and a second pressure plate 470 are provided on the outer surface of the cementing sleeve 400, and a nylon plate 480 is provided between the first pressure plate 460 and the second pressure plate 470.

[0058] like Figure 3 As shown, in a specific embodiment of a cementing device provided in this utility model, a sponge 415 is provided inside the insertion hole 411.

[0059] It is important to note that, to prevent cement slurry from entering the socket 411 during the grouting process, which could potentially cause the baffle 500 to disengage from the slot 412, a sponge 415 is installed inside the socket 411. The sponge 415 prevents cement slurry from entering the socket 411 and impacting the second inclined surface 510, thus preventing the end of the baffle 500 from disengaging from the slot 412. On the other hand, when the valve body 310 moves downward, the insert 311 will insert into the socket 411 and impact the second inclined surface 510. To prevent the insert 311 from breaking under the huge impact force, which would cause the impact on the second inclined surface 510 to fail, the sponge 415 provides a buffer distance for the insert 311.

[0060] like Figure 2 and Figure 3 As shown, in a specific embodiment of the cementing device provided in this utility model, a sliding groove 120 is provided on the inner wall of the marker rod 100, and a slider 314 matching the sliding groove 120 is provided on the outer surface of the valve body 310 so that the valve body 310 will not rotate when it moves down.

[0061] Specifically, in order to ensure that the insert 311 can be accurately inserted into the socket 411, a slider 314 can be set on the periphery of the valve body 310, and a sliding groove 120 can be set on the inner wall of the pointer 100. During the downward movement of the valve body 310, the valve body 310 will always move along the sliding groove 120 to avoid rotation, which would cause the insert 311 to fail to be inserted into the socket 411.

[0062] The working principle of this utility model:

[0063] like Figure 9As shown, firstly, the marker 100 and the external sleeve 600 are inserted into the bedrock exposed borehole 700. Then, the second grouting head 330 is connected to the grouting pump. First, a replacement grout is injected from the second grouting head 330, and then cement grout is injected. The cement grout enters the first injection hole 110 inside the marker 100 through the second grouting head 330. The cement grout entering the marker 100 enters the marker 200 and reaches the bedrock exposed borehole 700 through the sealing cone hole 414 and the third injection hole 413 of the plug body 410, the fourth injection hole 431 of the adjusting nut 430, and the second injection hole 210 of the marker bottom 200. After the cement grout is injected, the first grouting head 320 is connected to the grouting pump, the second grouting head 330 is sealed, the positioning part 340 is removed, and the replacement grout is injected from the first grouting head 320 into the space above the valve body 310. The replacement grout pushes the valve body 310 downwards, and the cement grout below the valve body 310 fills the gap between the marker 100, the marker bottom 200, and the bedrock exposed hole 700. Excess cement grout returns to above the first pressure plate 460 through the gap between the nylon plate 480 and the bedrock exposed hole 700. When the height of the excess cement grout exceeds the height of the baffle 500, the protruding column 420 no longer needs to limit the baffle 500, and the fan blades 530 on the baffle 500 will stand up under the action of buoyancy, thereby reducing the resistance to the upward flow of cement grout. When the valve body 310 moves down to the upper end of the piston, the cone 312 and the sealing cone hole 414 are sealed, and the sealing ring 3121 Inserted into the sealing groove 4141, the third injection hole 413 of the plug body 410 can be sealed. At this time, the insert 311 is inserted into the insertion hole 411 and impacts the second inclined surface 510. Under the continuous impact of the insert 311, the end of the resisting fan 500 is disengaged from the slot 412. During this process, if the fan blade 530 did not stand up under the action of buoyancy before, under the action of impact, the end of the resisting fan 500 is forced to disengage from the slot 412, so that the protruding post 420 is forced to disengage from the top groove 531, so that the fan blade 530 can rotate under the action of buoyancy and stand up. At this time, the plug body 410 is no longer limited. The plug body 410 moves down under the thrust of the slurry displacement fluid. The plug body 410 no longer seals the drainage and slurry discharge hole 450. The drainage and slurry discharge hole 450 is opened, and the excess cement slurry is flushed out of the drainage and slurry discharge hole 450 by the slurry displacement fluid until the cementing operation is completed.

[0064] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0065] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

Claims

1. A cementing device, characterized in that, include: The benchmark (100) has a first injection hole (110) inside; The base (200) is located at the bottom of the marker (100) and has a second injection hole (210) inside. A cementing head (300) is disposed on the top of the marker (100), and a valve body (310) is provided inside the cementing head (300); A cementing sleeve (400) is provided in the middle of the marker (100), and a plug (410) is provided inside the cementing sleeve (400); The valve body (310) is provided with a plug (311) on its end face; The plug (410) has an insertion hole (411) on its end face and a slot (412) on its outer surface. The slot (412) has a first inclined surface and the insertion hole (411) is connected to the first inclined surface. A baffle (500) is inserted into the outer wall of the cementing sleeve (400). One end of the baffle (500) is provided with a second inclined surface (510) that matches the first inclined surface. One end of the baffle (500) is inserted into the slot (412), and the first inclined surface abuts against the second inclined surface (510).

2. The cementing device as described in claim 1, characterized in that: The blocking fan (500) includes a plug (520) and a fan blade (530). The plug (520) has a hinge portion at one end away from the second inclined surface (510). The hinge portion has a hinge shaft (540) and a fall-prevention platform (550). The end of the fan blade (530) has a hinge hole. The hinge shaft (540) is inserted into the hinge hole, and the fan blade (530) rests on the fall-prevention platform (550).

3. A cementing device as described in claim 2, characterized in that: The bottom side of the fan blade (530) is provided with cement aerogel (560).

4. A cementing device as described in claim 3, characterized in that: The bottom side of the fan blade (530) is provided with a top groove (531), and one side wall of the top groove (531) is provided with an arc-shaped protrusion (532). The outer surface of the cementing sleeve (400) is provided with a protruding post (420), and the end of the protruding post (420) is provided with a hemisphere (421). The protruding post (420) is inserted into the top groove (531), and the hemisphere (421) abuts against the arc-shaped protrusion (532).

5. A cementing device as described in claim 1, characterized in that: The valve body (310) is provided with a cone-shaped body (312), and a sealing ring (3121) is provided on the outer surface of the cone-shaped body (312). The plug body (410) is provided with a third injection hole (413) and a sealing cone hole (414) inside. The third injection hole (413) and the sealing cone hole (414) are connected, and a sealing groove (4141) matching the sealing ring (3121) is provided on the inner wall of the sealing cone hole (414).

6. A cementing device as described in claim 1, characterized in that: The cementing head (300) has a positioning element (340) on its side wall, and the valve body (310) has a positioning hole (313) on its side wall. The end of the positioning element (340) is inserted into the positioning hole (313).

7. A cementing device as described in claim 1, characterized in that: The cementing head (300) is also provided with a first grouting head (320) and a second grouting head (330) on its side wall. The first grouting head (320) is located on the upper part of the valve body (310), and the second grouting head (330) is located on the lower part of the valve body (310).

8. A cementing device as described in claim 1, characterized in that: The bottom of the cementing sleeve (400) is provided with an adjusting nut (430), and a fourth injection hole (431) is opened inside the adjusting nut (430). A first elastic element (440) is provided between the adjusting nut (430) and the plug (410). A drainage and slurry discharge hole (450) is opened at the corresponding position of the plug (410) on the side wall of the cementing sleeve (400). A first pressure plate (460) and a second pressure plate (470) are provided on the outer surface of the cementing sleeve (400), and a nylon plate (480) is provided between the first pressure plate (460) and the second pressure plate (470).

9. A cementing device as described in claim 1, characterized in that: The insertion hole (411) is provided with a sponge (415).

10. A cementing device as described in claim 1, characterized in that: The inner wall of the marker (100) is provided with a sliding groove (120), and the outer surface of the valve body (310) is provided with a slider (314) that matches the sliding groove (120) so that the valve body (310) will not rotate when it moves down.

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