Wellhead protection device for hydrological monitoring

Abstract

The hydrological monitoring wellhead protection device comprises a protection cylinder arranged on the outer side of a well casing in a sleeving mode and a top cover arranged at an upper opening of the protection cylinder in a covering mode, multiple sets of supporting assemblies are evenly distributed on the inner wall of the protection cylinder in the circumferential direction, and each supporting assembly comprises a supporting rod, a connecting cylinder and a force application telescopic rod which are located on the same vertical plane; the lower end of the supporting rod is rotationally connected to the lower end of the protection cylinder, the upper end of the supporting rod inclines upwards and is used for abutting against the side wall of a well casing, the connecting cylinder is fixedly connected to the middle end of the supporting rod, the force application telescopic rod is located above the supporting rod, and the upper end of the force application telescopic rod is rotationally connected to the upper middle end of the protection cylinder. And the lower end of the connecting rod inclines downwards and abuts against the connecting cylinder. The technical problems that in the prior art, a wellhead protection device is low in installation efficiency and inconvenient to disassemble can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrological monitoring equipment, and particularly relates to a wellhead protection device for hydrological monitoring. Background Art

[0002] Groundwater resources are more complex than surface water resources. Therefore, the changes in the quality and quantity of groundwater itself, as well as the environmental conditions causing groundwater changes and the migration law of groundwater, cannot be directly observed. At the same time, land subsidence caused by overexploitation of groundwater due to irrigation and groundwater pollution is slow-changing. Once it accumulates to a certain extent, it becomes irreversible damage. Therefore, to accurately develop and protect groundwater, it is necessary to rely on long-term groundwater monitoring to timely master the dynamic changes. This requires the establishment of a groundwater monitoring system.

[0003] In this regard, the existing wellhead monitoring systems are usually set up in the following way: First, enclose the mold on the part of the well pipe above the ground and pour concrete to form a well platform. Embed bolts in the well platform to use the well platform as a stable foundation for subsequent installation of the wellhead protection cylinder. Then, fix the wellhead protection cylinder to the well platform through bolts, and set hooks or trays inside the wellhead protection cylinder, and set a water level gauge, a water quality monitor, a water temperature gauge, and a data acquisition and transmission module inside to monitor groundwater in real time after setting. Finally, cover the upper opening of the wellhead protection cylinder with a cover plate to achieve sealing and prevent sundries from entering.

[0004] For the above installation method, it is necessary to first pour and form a concrete well platform, and then install the wellhead protection cylinder, with low installation efficiency and inconvenient subsequent removal. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a wellhead protection device for hydrological monitoring to improve the technical problems of low installation efficiency and inconvenient removal of the wellhead protection device in the existing technology.

[0006] The present invention is realized through the following technical solutions:

[0007] A wellhead protection device for hydrological monitoring includes a protection cylinder sleeved outside the well pipe and a top cover covering the upper opening of the protection cylinder. A plurality of groups of support assemblies are evenly distributed circumferentially on the inner wall of the protection cylinder. Each support assembly includes a support rod, a connecting cylinder, and a force-applying telescopic rod located in the same vertical plane. The lower end of the support rod is rotatably connected to the lower end of the protection cylinder, the upper end is inclined upward and used to abut against the side wall of the well pipe, the connecting cylinder is fixedly connected to the middle end of the support rod, the force-applying telescopic rod is located above the support rod, and the upper end is rotatably connected to the upper middle end of the protection cylinder, and the lower end is inclined downward and abuts against the connecting cylinder.

[0008] Further, the support rod includes a first rotating seat fixedly connected to the protection cylinder and a rod body rotatably connected to the lower end of the first rotating seat. The upper end of the rod body is used to abut against the side wall of the well pipe, and the connecting cylinder is fixedly connected to the rod body.

[0009] Further, the rod body includes a lower rod section rotatably connected to the lower end of the first rotating seat, an intermediate sleeve threadedly connected to the upper end of the lower rod section at one end, and an upper rod section threadedly connected to the other end of the intermediate sleeve at the lower end. The thread directions of the intermediate sleeve threadedly connected to both ends of the lower rod section and the upper rod section are opposite. The upper end of the upper rod section is used to abut against the side wall of the well pipe, and the connecting cylinder is fixedly connected to the intermediate sleeve.

[0010] Further, the support rod further includes a second rotating seat and an arc plate. The second rotating seat is rotatably connected to the upper end of the rod body with the rod body as the central axis, and the arc plate is rotatably connected to the second rotating seat, and the arc plate is used to abut against the outer wall of the well pipe.

[0011] Further, the first rotating seat is provided with an insertion hole, the rod body is provided with a plurality of positioning holes that can communicate with the insertion hole, and the positioning holes are circumferentially and evenly distributed with the rotation axis of the rod body as the central axis, and the connected insertion hole and the positioning hole are simultaneously inserted with a positioning rod.

[0012] Further, the force-applying telescopic rod includes a third rotating seat fixedly connected to the middle upper part of the protection cylinder, a cylinder rod rotatably connected to one end of the third rotating seat, and a force-applying rod threadedly connected to the upper end of the cylinder rod. The lower end of the force-applying rod abuts against the connecting cylinder.

[0013] Further, the protection cylinder includes a cylinder body and a support ring fixedly connected to the inner wall of the lower end of the outer side of the cylinder body. The first rotating seat is fixedly connected to the upper side of the support ring, and the upper end of the force-applying telescopic rod is rotatably connected to the middle upper part of the cylinder body.

[0014] Further, the protection cylinder further includes a plurality of soil nails, each soil nail is inserted into the support ring, the number of the soil nails is equal to the number of the first rotating seats, and each first rotating seat is fixedly connected to each soil nail one by one.

[0015] Further, the protection cylinder further includes an entry section, the entry section extends vertically coaxially with the cylinder body, and the upper end is fixedly connected to the lower end of the cylinder body, and the lower end vertical cross section is in a sharp cone-shaped structure.

[0016] Further, the top cover includes a base fixedly connected to the outer wall of the upper end of the protection cylinder, a fastening seat fixedly connected to the outer wall of the upper end of the protection cylinder and opposite to the base, and a plastic cover plate rotatably connected to the base. The plastic cover plate is fastened to the fastening seat by a fastener.

[0017] The beneficial effects of the present invention are as follows:

[0018] For this hydrological monitoring wellhead protection device, a protection cylinder is sleeved outside the well pipe, and multiple groups of support assemblies are evenly arranged circumferentially on the inner side of the protection cylinder. The triangular structure formed by the support rod, the protection cylinder, and the force-applying telescopic rod is used to support the outer wall of the well pipe, and the protection cylinder is fixed by the reaction force of the well pipe. Specifically, rotate each support rod so that the upper end of the support rod abuts against the side wall of the well pipe, and then rotate each force-applying telescopic rod, and extend the length of the force-applying telescopic rod and make it abut tightly against the connecting cylinder until the upper ends of all support rods abut against the side wall of the well pipe. In this way, under the formed triangular support structure, the rapid and stable installation of the protection cylinder is completed. When disassembly is required, shorten the force-applying telescopic rod and remove the support rod to improve the technical problems of the low installation efficiency of the wellhead protection device in the prior art and the inconvenience of demolition.

[0019] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the structural diagram of the present invention;

[0021] Figure 2 is the first partial structural cross-sectional view of the present invention;

[0022] Figure 3 is of the present invention Figure 2 partial enlarged view of A therein, showing the working state of the support assembly;

[0023] Figure 4 is the second partial structural cross-sectional view of the present invention, showing the contracted state of the support assembly.

[0024] In the figure: 1, well pipe; 2, protection cylinder; 21, cylinder body; 22, support ring; 23, soil nail; 24, entry section; 3, top cover; 31, base; 32, fastening seat; 33, plastic cover plate; 34, fastener; 4, support rod; 41, first rotating seat; 411, jack; 42, rod body; 421, lower rod section; 4211, positioning hole; 4212, positioning rod; 422, intermediate sleeve; 423, upper rod section; 43, second rotating seat; 44, arc plate; 5, connecting cylinder; 6, force-applying telescopic rod; 61, third rotating seat; 62, cylinder rod; 63, force-applying rod. DETAILED DESCRIPTION OF THE INVENTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0027] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the above description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "one side" and "the other side" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, terms such as "first" and "second" are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0029] In addition, terms such as "the same" do not mean that the components are absolutely the same, but there may be slight differences. The term "vertical" only means that the positional relationship between components is relatively more vertical than "parallel", and does not mean that the structure must be completely vertical, but may be slightly inclined.

[0030] Please refer to Figures 1-4 , the present invention provides a technical solution: a protection device for a hydrological monitoring wellhead, including a protection cylinder 2 sleeved outside a well pipe 1 and a top cover 3 covering the opening of the protection cylinder 2. A plurality of groups of support assemblies are evenly distributed circumferentially on the inner wall of the protection cylinder 2. Each support assembly includes a support rod 4, a connecting cylinder 5, and a force-applying telescopic rod 6 located in the same vertical plane. The lower end of the support rod 4 is rotatably connected to the lower end of the protection cylinder 2, and the upper end is inclined upward and used to abut against the side wall of the well pipe 1. The connecting cylinder 5 is fixedly connected to the middle end of the support rod 4. The force-applying telescopic rod 6 is located above the support rod 4, and the upper end is rotatably connected to the middle upper end of the protection cylinder 2, and the lower end is inclined downward and abuts against the connecting cylinder 5.

[0031] During installation, the protection cylinder 2 is sleeved outside the well pipe 1, and the protection cylinder 2 and the well pipe 1 are coaxially centered. Then, each support rod 4 is rotated so that the upper end of the support rod 4 abuts against the side wall of the well pipe 1. Then, each force-applying telescopic rod 6 is rotated so that the length of the force-applying telescopic rod 6 is extended and it abuts tightly against the connecting cylinder 5 until the upper ends of all the support rods 4 abut against the side wall of the well pipe 1. In this way, a tightening effect between the well pipe 1 and the protection cylinder 2 is formed by the support of each support assembly. Under the reaction force of the well pipe 1, under the formed triangular support structure, the rapid and stable installation of the protection cylinder 2 is completed. When disassembly is required, shorten the force-applying telescopic rod 6 and remove the support rod 4. In this way, the technical problems in the prior art that the installation efficiency of the wellhead protection device is relatively low and it is not convenient to disassemble are improved.

[0032] Moreover, under the reaction force of the well pipe 1, the acting force is transmitted downward from the support rod 4 to the protection cylinder 2, which can relatively improve the installation stability of the protection cylinder 2.

[0033] The multiple groups of support assemblies can specifically be two groups, three groups, four groups, five groups, etc. Only three groups are shown in the figure.

[0034] The minimum lengths of the support rod 4 and the force-applying telescopic rod 6 are greater than the distance from the inner side of the protection cylinder 2 to the outer side of the well pipe 1 to ensure that the support rod 4 can abut tightly against the outer wall of the well pipe 1 and the force-applying telescopic rod 6 can abut tightly against the connecting cylinder 5 on the support rod 4.

[0035] Please refer to Figures 2-4 , in this embodiment: The support rod 4 includes a first rotating seat 41 fixedly connected to the protection cylinder 2 and a rod body 42 whose lower end is rotatably connected to the first rotating seat 41. The upper end of the rod body 42 is used to abut tightly against the side wall of the well pipe 1, and the connecting cylinder 5 is fixedly connected to the rod body 42.

[0036] During installation, the rod body 42 is rotated with the first rotating seat 41 as the central axis, and the upper end of the rod body 42 can be made to abut tightly against the side wall of the well pipe 1.

[0037] Among them, the first rotating seat 41 includes two first fixing plates and a first fixing shaft. One ends of the two first fixing plates are fixedly connected to the protection cylinder 2, and the two ends of the first fixing shaft are respectively rotatably connected to the two first fixing plates.

[0038] The rod body 42 includes a lower rod section 421 whose lower end is rotatably connected to the first rotating seat 41, an intermediate sleeve 422 whose one end is threadedly connected to the upper end of the lower rod section 421, and an upper rod section 423 whose lower end is threadedly connected to the other end of the intermediate sleeve 422. The thread rotation directions of the two ends of the intermediate sleeve 422 threadedly connected to the lower rod section 421 and the upper rod section 423 are opposite. The upper end of the upper rod section 423 is used to abut tightly against the side wall of the well pipe 1, and the connecting cylinder 5 is fixedly connected to the intermediate sleeve 422.

[0039] When the upper end of the rod body 42 abuts against the side wall of the well pipe 1 by rotation, the overall length of the rod body 42 can be extended by rotating the intermediate sleeve 422 and / or the upper rod section 423, so as to adjust the position where the upper rod section 423 abuts against the side wall of the well pipe 1, and improve the installation stability of the protection cylinder 2 under the reaction force.

[0040] Wherein, the lower end of the lower rod section 421 penetrates through the opening for the first fixed shaft to pass through.

[0041] The support rod 4 further includes a second rotating seat 43 and an arc plate 44. The second rotating seat 43 is rotatably connected to the upper end of the rod body 42 with the rod body 42 as the central axis, and the arc plate 44 is rotatably connected to the second rotating seat 43, and the arc plate 44 is used to abut against the outer wall of the well pipe 1.

[0042] During installation, under the rotation of the rod body 42, the arc plate 44 is driven to abut against the outer wall of the well pipe 1. By the arc plate 44, the force-bearing area and friction are increased, preventing the support failure of the support rod 4 on the well pipe 1 to ensure effective support. Moreover, when the arc plate 44 abuts against the outer wall of the well pipe 1 by adjusting the length of the rod body 42, the angle and position of the arc plate 44 can be assisted and adjusted by rotating the second rotating seat 43.

[0043] Wherein, the second rotating seat 43 includes a U-shaped seat and a second fixed shaft. One end of the U-shaped seat is rotatably connected to the upper end of the upper rod section 423 of the rod body 42, and the two ends of the second fixed shaft are respectively rotatably connected to the two arms of the U-shaped seat. A transfer plate is fixedly connected to the back of the arc plate 44, the transfer plate penetrates through the opening, and the second fixed shaft passes through the opening of the transfer plate.

[0044] The first rotating seat 41 is provided with a jack 411, and the rod body 42 is provided with a plurality of positioning holes 4211 that can communicate with the jack 411. Each positioning hole 4211 is circumferentially and evenly distributed with the rotation axis of the rod body 42 as the central axis, and a positioning rod 4212 is inserted into the connected jack 411 and positioning hole 4211 at the same time.

[0045] During transportation, the force-applying telescopic rod 6 can be first rotated reversely to abut against the inner wall of the protection cylinder 2, and then the support rod 4 is rotated reversely to abut against the inner wall of the protection cylinder 2. At this time, since the support rod 4 and the force-applying telescopic rod 6 are in the same vertical plane, the rotated force-applying telescopic rod 6 is located between the inner wall of the protection cylinder 2 and the support rod 4. The positioning rod 4212 is inserted into the connected jack 411 and positioning hole 4211, so that the support rod 4 can no longer rotate, and the support rod 4 forms a limiting effect on the force-applying telescopic rod 6 inside it, so that both the support rod 4 and the force-applying telescopic rod 6 are kept in a vertical state for subsequent transportation.

[0046] As an alternative solution to the above embodiments, the positioning rod 4212 is threadedly connected to the jack 411 or the positioning hole 4211 to prevent the positioning rod 4212 from coming out.

[0047] Please refer to Figures 2-3 , in this embodiment: The force-applying telescopic rod 6 includes a third rotating seat 61 fixedly connected to the upper middle part of the protection cylinder 2, a cylinder rod 62 with one end rotatably connected to the third rotating seat 61, and a force-applying rod 63 threadedly connected to the upper end of the cylinder rod 62. The lower end of the force-applying rod 63 abuts against the connecting cylinder 5.

[0048] After rotating each support rod 4 and making the upper end of the support rod 4 abut against the side wall of the well pipe 1, then rotate each force-applying telescopic rod 6 and rotate the force-applying rod 63 to extend the length of the force-applying telescopic rod 6 until the force-applying rod 63 abuts tightly against the connecting cylinder 5, so that the upper ends of each support rod 4 all abut against the side wall of the well pipe 1.

[0049] Among them, the third rotating seat 61 includes two third fixing plates and a third fixing shaft. One end of each of the two third fixing plates is fixedly connected to the inner wall of the protection cylinder 2, and the two ends of the third fixing shaft are respectively rotatably connected to the two third fixing plates.

[0050] One end of the cylinder rod 62 has a through opening for the third fixing shaft to pass through and be rotatably installed.

[0051] The protection cylinder 2 includes a cylinder body 21 and a support ring 22 fixedly connected to the inner wall of the lower end of the cylinder body 21. The first rotating seat 41 is fixedly connected to the upper side of the support ring 22, and the upper end of the force-applying telescopic rod 6 is rotatably connected to the upper middle part of the cylinder body 21.

[0052] During installation, insert the cylinder body 21 downward into the ground, and the well pipe 1 extends in from the center of the support ring 22. While the cylinder body 21 supports on the ground, the support ring 22 can also support on the ground simultaneously, improving the balance; and after installing the support rods 4 and the force-applying telescopic rods 6, the force applied by the force-applying telescopic rods 6 to the support rods 4 can be transmitted to the support ring 22 to further improve the stability of the support ring 22 supporting on the ground.

[0053] On the basis of the above embodiments, the third rotating seat 61 of the force-applying telescopic rod 6 is fixedly connected to the inner wall of the cylinder body 21.

[0054] Please refer to Figures 2-4 , in this embodiment: The protection cylinder 2 further includes a plurality of soil nails 23. Each soil nail 23 is inserted into the support ring 22. The number of soil nails 23 is equal to the number of the first rotating seats 41, and each of the first rotating seats 41 is fixedly connected to each of the soil nails 23.

[0055] While the support ring 22 is supported on the ground, each soil nail 23 is driven into the ground, which can further improve the stability. Moreover, the first rotating seat 41 is fixedly connected to the soil nail 23, enabling the force exerted by the force-applying telescopic rod 6 on the support rod 4 to be transmitted to the soil nail 23 and then to the ground through the soil nail 23. In this way, the stability of the soil nail 23 embedded in the ground can be ensured.

[0056] Among them, the lower ends of the two first fixing plates of the first rotating seat 41 are fixedly connected to the head of the soil nail 23.

[0057] As a specific installation method, the soil nail 23 and the first rotating seat 41 can be fixedly connected by welding, integrally formed, or connected by screws.

[0058] The protection cylinder 2 further includes an insertion section 24. The insertion section 24 extends vertically coaxially with the cylinder body 21, and the upper end is fixedly connected to the lower end of the cylinder body 21, and the lower end has a pointed cone-shaped structure in the vertical cross-section.

[0059] When the protection cylinder 2 is placed on the ground, the insertion section 24 can be inserted into the ground, further improving the installation stability of the entire device. At the same time, during use, a double-layer protection effect can be formed by the insertion section 24 and the support ring 22 to prevent foreign objects and water from entering the cylinder body 21, so as to ensure the safety of the equipment inside the cylinder body 21.

[0060] Please refer to Figures 1-2 , in this embodiment: The top cover 3 includes a base 31 fixedly connected to the outer wall of the upper end of the protection cylinder 2, a fastening seat 32 fixedly connected to the outer wall of the upper end of the protection cylinder 2 and opposite to the base 31, and a plastic cover plate 33 rotatably connected to the base 31. The plastic cover plate 33 is fastened to the fastening seat 32 by a fastener 34.

[0061] After the protection cylinder 2 is installed and the detection equipment is installed inside the protection cylinder 2, the plastic cover plate 33 is fastened to the fastening seat 32 by the fastener 34, and the installation operation can be completed. In actual monitoring work, the monitoring wireless signal of the monitoring equipment can be transmitted through the plastic cover plate 33.

[0062] Among them, the fastener 34 can be a bolt.

[0063] The plastic cover plate 33 includes a first plastic cover plate, a second plastic cover plate, a rubber ring, and a plastic disc; the middle of the top of the first plastic cover plate is fixed to one end of the plastic disc, the other end of the plastic disc passes through the rubber ring and is bonded with the second plastic cover plate, and a plurality of circular holes are equidistantly arranged in a circle inside the rubber ring. A fixing rod passes through the inside of the circular hole, and the upper and lower sides of the fixing rod are respectively fixedly connected to the second plastic cover plate and the first plastic cover plate.

[0064] By providing double plastic covers, a plastic disc, rubber rings and fixing rods on the plastic disc, not only can the double plastic covers and the plastic disc be set, but also rubber rings are arranged around the plastic disc. By using the rubber rings to fit with the double plastic covers, the buffering performance of the plastic covers can be increased. Moreover, by arranging fixing rods inside the rubber rings, support can be provided around the double plastic covers, increasing the strength of the double plastic covers, which is beneficial for more practical use of a wellhead protection device for hydrological monitoring.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A wellhead protection device for hydrological monitoring, comprising a protection cylinder (2) sleeved outside a well pipe (1) and a top cover (3) covering the opening of the protection cylinder (2), characterized in that: The inner wall of the protection cylinder (2) is evenly distributed with multiple groups of support assemblies in the circumferential direction. Each support assembly includes a support rod (4), a connecting cylinder (5), and a force-applying telescopic rod (6) located in the same vertical plane. The lower end of the support rod (4) is rotatably connected to the lower end of the protection cylinder (2), and the upper end inclines upward and is used to abut against the side wall of the well pipe (1). The connecting cylinder (5) is fixedly connected to the middle end of the support rod (4). The force-applying telescopic rod (6) is located above the support rod (4), and the upper end is rotatably connected to the upper middle end of the protection cylinder (2), and the lower end inclines downward and abuts against the connecting cylinder (5).

2. The hydrological monitoring wellhead protection device according to claim 1, characterized in that: The support rod (4) includes a first rotating seat (41) fixedly connected to the protection cylinder (2) and a rod body (42) whose lower end is rotatably connected to the first rotating seat (41). The upper end of the rod body (42) is used to abut against the side wall of the well pipe (1), and the connecting cylinder (5) is fixedly connected to the rod body (42).

3. The hydrological monitoring wellhead protection device according to claim 2, characterized in that: The rod body (42) includes a lower rod section (421) whose lower end is rotatably connected to the first rotating seat (41), an intermediate sleeve (422) whose one end is threadedly connected to the upper end of the lower rod section (421), and an upper rod section (423) whose lower end is threadedly connected to the other end of the intermediate sleeve (422). The thread rotation directions of the intermediate sleeve (422) threadedly connected to both ends of the lower rod section (421) and the upper rod section (423) are opposite. The upper end of the upper rod section (423) is used to abut against the side wall of the well pipe (1), and the connecting cylinder (5) is fixedly connected to the intermediate sleeve (422).

4. The hydrological monitoring wellhead protection device according to claim 2, characterized in that: The support rod (4) further includes a second rotating seat (43) and an arc plate (44). The second rotating seat (43) is rotatably connected to the upper end of the rod body (42) with the rod body (42) as the central axis, and the arc plate (44) is rotatably connected to the second rotating seat (43), and the arc plate (44) is used to abut against the outer wall of the well pipe (1).

5. The hydrological monitoring wellhead protection device according to claim 2, characterized in that: The first rotating seat (41) is provided with an insertion hole (411), and the rod body (42) is provided with a plurality of positioning holes (4211) that can communicate with the insertion hole (411). Each positioning hole (4211) is evenly distributed in the circumferential direction with the rotation axis of the rod body (42) as the central axis, and a positioning rod (4212) is inserted into the connected insertion hole (411) and positioning hole (4211) simultaneously.

6. The hydrological monitoring wellhead protection device according to claim 1, characterized in that: The force-applying telescopic rod (6) includes a third rotating seat (61) fixedly connected to the upper middle end of the protection cylinder (2), a cylinder rod (62) whose one end is rotatably connected to the third rotating seat (61), and a force-applying rod (63) whose upper end is threadedly connected to the cylinder rod (62). The lower end of the force-applying rod (63) abuts against the connecting cylinder (5).

7. The hydrological monitoring wellhead protection device according to any one of claims 2-5, characterized in that: The protection cylinder (2) includes a cylinder body (21) and a support ring (22) fixedly connected to the inner wall of the lower end of the cylinder body (21). The first rotating seat (41) is fixedly connected to the upper side of the support ring (22), and the upper end of the force-applying telescopic rod (6) is rotatably connected to the upper middle end of the cylinder body (21).

8. The hydrological monitoring wellhead protection device according to claim 7, wherein: The protection cylinder (2) further includes a plurality of soil nails (23), each of the soil nails (23) is inserted into the support ring (22), the number of the soil nails (23) is equal to the number of the first rotating seats (41), and each of the first rotating seats (41) is fixedly connected to each of the soil nails (23).

9. The hydrological monitoring wellhead protection device according to claim 7, characterized in that: The protection cylinder (2) further includes an insertion section (24), the insertion section (24) extends vertically coaxially with the cylinder body (21), and the upper end is fixedly connected to the lower end of the cylinder body (21), and the vertical cross-section of the lower end is in a sharp cone structure.

10. The wellhead protection device for hydrological monitoring according to any one of claims 1-6, characterized in that: The top cover (3) includes a base (31) fixedly connected to the outer wall of the upper end of the protection cylinder (2), a fastening seat (32) fixedly connected to the outer wall of the upper end of the protection cylinder (2) and opposite to the base (31), and a plastic cover plate (33) rotatably connected to the base (31), and the plastic cover plate (33) is fastened to the fastening seat (32) by a fastener (34).

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