An underground water monitoring wellhead protection device

Abstract

The present invention discloses a protection device for a groundwater monitoring wellhead, which includes a support plate. A through hole is formed through the top of the support plate. Above the support plate, there is an anti-loosening and collapsing mechanism for automatically compacting the soil around the wellhead. The present invention relates to the technical field of wellhead protection. For this protection device for a groundwater monitoring wellhead, through the setting of the anti-loosening and collapsing mechanism, when the anti-theft opening and closing mechanism works, the anti-loosening and collapsing mechanism is synchronously driven to work by the rotation of the ring. The turning plate is used to repeatedly press the pressing plate, and the pressing plate repeatedly compacts the soil around the wellhead, so that the soil structure around the wellhead is more stable, reducing potential safety hazards and effectively reducing the probability of wellhead collapse. Through the setting of the elastic reset component, the reset operation of the pressing plate is realized. Cooperating with the anti-loosening and collapsing mechanism, the degree of automatic compaction is high, manual operation is not required, and the work efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wellhead protection, in particular to a groundwater monitoring wellhead protection device. Background Art

[0002] On the one hand, the role of groundwater monitoring is to uniformly monitor and manage water resources to ensure the normal development of the ecological environment. On the other hand, it provides the most basic reference material for engineering construction decisions. The smooth implementation of groundwater monitoring helps people understand the basic changing characteristics of groundwater at the first time. Once special circumstances occur, effective measures can be taken quickly to control it. Groundwater monitoring in the new era is also of great significance for preventing geological disasters and protecting the social environment. This work is not only a basic component of hydrological supervision, but also an important part of water resources monitoring, so it has received attention from many enterprises and departments.

[0003] The Chinese patent application with publication number CN113006727A discloses a wellhead protection device for groundwater monitoring and a method of use. The patent application solves the problems of low reliability, easy damage, and high equipment theft rate of current wellhead protection facilities. However, the above patent still has the following shortcomings:

[0004] (1) Due to geological changes, human excavation, rainwater impact and other reasons, the soil around the wellhead may become loose, resulting in instability of the wellhead and increasing safety hazards;

[0005] (2) The groundwater in the well cannot be automatically disturbed, and it is impossible to monitor and analyze the changes in water quality under disturbance conditions, including indicators such as dissolved oxygen, turbidity, and pH value;

[0006] In this regard, we proposed a groundwater monitoring wellhead protection device to solve the above problems. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a groundwater monitoring wellhead protection device, which solves the problems raised in the background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a groundwater monitoring wellhead protection device, comprising a support plate, a through hole is formed through the top of the support plate, and an anti-loosening and collapse mechanism for automatically compacting the soil around the wellhead is arranged above the support plate;

[0009] The anti-loosening and collapse mechanism comprises a cover shell arranged above the support plate, the top of the cover shell is fixed with four U-shaped rods, the bottom ends of the four U-shaped rods are fixed to the top of the support plate, the cover shell is provided with an annular plate covering the cover shell around the four sides, the outer surface of the annular plate is rotatably connected with rotating rods on both sides, one end of the two rotating rods is fixed with a rotating plate, the other ends of the two rotating rods penetrate the annular plate and extend to the inside of the annular plate, and the other ends of the two rotating rods are fixed with an arc plate, and one side of the two arc plates is fixed with a connecting column, two L-shaped plates are fixed on the top wall of the cover shell, one side of the two L-shaped plates is fixed with a triangular arc plate, a sliding groove is provided between the top of the two triangular arc plates and the bottom of the cover shell, the bottom of the cover shell is provided with two square grooves, the two square grooves are connected with the sliding groove, the two connecting columns slide in the sliding groove, the outer surface of the support plate is slidably connected with a pressing plate, and two elastic reset components that drive the pressing plate to reset are provided between the support plate and the pressing plate.

[0010] Preferably, the elastic reset assembly includes a vertical tube fixed on the top of the support plate, the top of the vertical tube is slidably connected to a vertical rod, the bottom end of the vertical rod extends to the inside of the vertical tube, a spring is fixed between the bottom end of the vertical rod and the bottom wall of the vertical tube, a horizontal plate is fixed to the top of the vertical rod, a connecting rod is fixed to the bottom of the horizontal plate, and the bottom end of the connecting rod is fixed to the top of the pressure plate.

[0011] Preferably, an anti-theft opening and closing mechanism for protecting the wellhead is provided on the top of the support plate, and the anti-theft opening and closing mechanism includes a ring rotatably connected to the top of the support plate, the inner wall of the ring is provided with internal teeth, the outer wall of the ring is provided with external teeth, and the top of the support plate is rotatably connected to gear 1.

[0012] Preferably, a motor is fixed to the bottom of the support plate, and the motor drives gear one to rotate, and the gear one is engaged with the external teeth. The top of the support plate is also rotatably connected to four gear twos, and the four gear twos are all engaged with the internal teeth. The top of the support plate is slidably connected to four tooth plates, and the four tooth plates are all engaged with gear two. Four horizontal grooves are opened on the top of the support plate.

[0013] Preferably, vertical rods are fixed to the bottom of the four tooth plates, the bottom ends of the four vertical rods extend into the interior of the transverse groove, and the four vertical rods are slidably connected to the inner surface of the transverse groove.

[0014] Preferably, two well water disturbance units for disturbing groundwater in the well are arranged between the support plate and the anti-collapse mechanism, the well water disturbance unit includes a cam fixed on a rotating rod, the top of the support plate is slidably connected to two moving rods, an arc-shaped bar is fixed between the top ends of the two moving rods, and the outer surface of the cam is in contact and extrusion with the top of the arc-shaped bar.

[0015] Preferably, the outer surfaces of the two moving rods are sleeved with springs 2, the top ends of the two springs 2 are fixed to the top of the arc strip, and the bottom ends of the two springs 2 are fixed to the top of the support plate.

[0016] Preferably, the bottom ends of the two movable rods pass through the support plate and extend to the bottom of the support plate, the bottom ends of the two movable rods are fixed with fixed plates, the bottoms of the two fixed plates are fixed with mounting rods, the bottom ends of the two mounting rods are fixed with circular plates, the bottoms of the two circular plates are fixed with multiple support rods, and water cones are fixed between the bottom ends of the multiple support rods.

[0017] Preferably, a plurality of fixing rods are fixed to the top of the ring, the top ends of the plurality of fixing rods are fixed to the bottom of the annular plate, a plurality of screw rods are threadedly connected to the support plate, and the bottom ends of the plurality of screw rods pass through the support plate and extend to the bottom of the support plate.

[0018] Beneficial Effects

[0019] The present invention provides a groundwater monitoring wellhead protection device. Compared with the prior art, it has the following beneficial effects:

[0020] (1) Through the setting of the anti-loosening and collapsing mechanism, when the anti-theft opening and closing mechanism is working, the anti-loosening and collapsing mechanism is driven to work synchronously through the rotation of the ring, and the pressure plate is repeatedly pressed by the flipping of the rotating plate. The pressure plate repeatedly compacts the soil around the wellhead, thereby making the soil structure around the wellhead more stable, reducing safety hazards, and effectively reducing the probability of collapse of the wellhead. Through the setting of the elastic reset component, the pressure plate reset operation is realized, and it works in conjunction with the anti-loosening and collapsing mechanism. The degree of automatic compaction is high, no manual operation is required, and work efficiency is improved.

[0021] (2) The automatic opening and closing of the wellhead is realized by setting up the anti-theft opening and closing mechanism. After locking the four tooth plates, it can not only protect the monitoring equipment in the wellhead from theft, but also prevent rainwater and garbage from entering the well, thus avoiding the pollution of the well water and making the monitoring results more accurate.

[0022] (3) Through the setting of the well water disturbance unit, when the anti-theft opening and closing mechanism drives the anti-loosening and collapse mechanism to work, the anti-loosening and collapse mechanism can synchronously drive the well water disturbance unit to work. The three work at the same time with strong linkage. When the well water disturbance unit works, it drives the cam to rotate, and then the cam drives the water holding cone to move up and down in the well water to take water. After taking water, it leaks through the bottom of the water holding cone, thereby creating well water disturbance. Then, the water quality changes of the well water under disturbance conditions can be monitored and analyzed, including indicators such as dissolved oxygen, turbidity, and pH value, making the monitoring data more diverse. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the external structure of the present invention;

[0024] Figure 2 A bottom view of the external structure of the present invention;

[0025] Figure 3 It is a three-dimensional diagram of the anti-theft opening and closing mechanism of the present invention;

[0026] Figure 4 It is an exploded view of the anti-theft opening and closing mechanism of the present invention;

[0027] Figure 5 is a cross-sectional view of an annular plate of the present invention;

[0028] Figure 6 For the present invention Figure 5 A partial enlarged view of the middle A;

[0029] Figure 7 A bottom view of the anti-loosening and collapse mechanism of the present invention;

[0030] Figure 8 For the present invention Figure 7 A partial enlarged view of point B in the middle;

[0031] Fig. 9 A three-dimensional diagram of a well water disturbance unit of the present invention;

[0032] Fig.10 It is a cross-sectional view of the pressure plate and the vertical pipe of the present invention.

[0033] In the figure: 1, support plate; 2, through hole; 3, anti-loosening and collapsing mechanism; 4, elastic reset component; 5, anti-theft opening and closing mechanism; 6, well water disturbance unit; 7, fixed rod; 8, screw rod; 31, cover; 32, U-shaped rod; 33, annular plate; 34, rotating rod; 35, rotating plate; 36, arc plate; 37, connecting column; 38, L-shaped plate; 39, triangular arc plate; 310, slide groove; 311, square groove; 312, pressure plate; 41, vertical pipe ; 42. Vertical rod; 43. Spring 1; 44. Horizontal plate; 45. Connecting rod; 51. Ring; 52. Inner teeth; 53. Outer teeth; 54. Gear 1; 55. Motor; 56. Gear 2; 57. Tooth plate; 58. Horizontal groove; 59. Vertical rod; 61. Cam; 62. Moving rod; 63. Arc strip; 64. Spring 2; 65. Fixed plate; 66. Mounting rod; 67. Round plate; 68. Support rod; 69. Water cone. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present invention provides three technical solutions, including the following embodiments:

[0036] Example 1

[0037] See also Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig.10 A groundwater monitoring wellhead protection device comprises a support plate 1, the support plate 1 provides support for the entire protection device, a through hole 2 is formed through the top of the support plate 1, the wellhead is located directly below the through hole 2, and an anti-loosening and collapsing mechanism 3 for automatically compacting the soil around the wellhead is arranged above the support plate 1;

[0038] The anti-loosening and collapse mechanism 3 includes a cover shell 31 arranged above the support plate 1. The center of the cover shell 31 is hollow. Four U-shaped rods 32 are fixed to the top of the cover shell 31. The bottom ends of the four U-shaped rods 32 are fixed to the top of the support plate 1. An annular plate 33 covering the cover shell 31 is arranged around the cover shell 31. Both sides of the outer surface of the annular plate 33 are rotatably connected with rotating rods 34. One end of the two rotating rods 34 is fixed with a rotating plate 35. The other ends of the two rotating rods 34 penetrate the annular plate 33 and extend to the inside of the annular plate 33. The other ends of the two rotating rods 34 are fixed with arc plates 36. One side of the two arc plates 36 is fixed with connecting columns 37. Two L-shaped plates 38 are fixed on the top wall of the cover shell 31. The two L-shaped plates 38 are fixed on the top wall of the cover shell 31. A triangular arc plate 39 is fixed on one side of the plate 38, and a slide groove 310 is provided between the top of the two triangular arc plates 39 and the bottom of the cover shell 31, and the connecting column 37 is adapted to the size of the slide groove 310. Two square grooves 311 are provided at the bottom of the cover shell 31, and the connecting column 37 enters the square groove 311 when sliding to the top, and the two square grooves 311 are connected with the slide groove 310, and the two connecting columns 37 slide in the slide groove 310. The outer surface of the support plate 1 is slidably connected with a pressure plate 312, and the rotating plate 35 squeezes the pressure plate 312 to move downward when flipping, and the pressure plate 312 can compact the soil around the wellhead, and two elastic reset components 4 for driving the pressure plate 312 to reset are arranged between the support plate 1 and the pressure plate 312.

[0039] The elastic reset assembly 4 includes a vertical tube 41 fixed on the top of the support plate 1, the top of the vertical tube 41 is slidably connected with a vertical rod 42, the bottom end of the vertical rod 42 extends to the inside of the vertical tube 41, a spring 43 is fixed between the bottom end of the vertical rod 42 and the bottom wall of the vertical tube 41, a horizontal plate 44 is fixed on the top of the vertical rod 42, a connecting rod 45 is fixed on the bottom of the horizontal plate 44, and the bottom end of the connecting rod 45 is fixed to the top of the pressure plate 312.

[0040] By setting the anti-loosening and collapse mechanism 3, when the anti-theft opening and closing mechanism 5 is working, the anti-loosening and collapse mechanism 3 is driven to work synchronously by the rotation of the ring 51, and the pressure plate 312 is repeatedly pressed by the flipping of the rotating plate 35, and the pressure plate repeatedly compacts the soil around the wellhead, thereby making the soil structure around the wellhead more stable, reducing safety hazards, and effectively reducing the probability of collapse of the wellhead. Through the setting of the elastic reset component 4, the reset operation of the pressure plate 312 is realized, and it works in conjunction with the anti-loosening and collapse mechanism 3, and the degree of automatic compaction is high.

[0041] A plurality of fixing rods 7 are fixed to the top of the ring 51 , and the top ends of the plurality of fixing rods 7 are fixed to the bottom of the annular plate 33 . The fixing rods 7 connect the ring 51 and the annular plate 33 .

[0042] Example 2

[0043] Based on Example 1, see Figure 3 and Figure 4 As shown, an anti-theft opening and closing mechanism 5 for protecting the wellhead is provided on the top of the support plate 1. The anti-theft opening and closing mechanism 5 includes a ring 51 rotatably connected to the top of the support plate 1, an inner wall of the ring 51 is provided with inner teeth 52, an outer wall of the ring 51 is provided with outer teeth 53, and the top of the support plate 1 is rotatably connected with a gear 54.

[0044] A motor 55 is fixed to the bottom of the support plate 1. The motor 55 is a three-phase asynchronous motor that can rotate forward and reverse, is controlled by an external switch, and is electrically connected to an external power supply. The motor 55 drives the gear 1 54 to rotate, and the gear 1 54 meshes with the outer teeth 53. The top of the support plate 1 is also rotatably connected to four gear 2s 56, and the four gear 2s 56 are all meshed with the inner teeth 52. The top of the support plate 1 is slidably connected to four tooth plates 57, and the four tooth plates 57 are all meshed with the gear 2 56. When the four tooth plates 57 are closed, they can be closed to just cover the main through hole 2. Four transverse grooves 58 are opened on the top of the support plate 1.

[0045] Vertical rods 59 are fixed to the bottom of the four tooth plates 57 . The bottom ends of the four vertical rods 59 extend into the interior of the transverse groove 58 , and the four vertical rods 59 are slidably connected to the inner surface of the transverse groove 58 .

[0046] By setting up the anti-theft opening and closing mechanism 5, the automatic opening and closing of the wellhead is realized. After locking the four tooth plates 57, not only the monitoring equipment in the wellhead can be protected from theft, but also rainwater and garbage from the outside can be prevented from entering the well, thus avoiding the pollution of the well water and making the monitoring result more accurate.

[0047] A plurality of screw rods 8 are threadedly connected to the support plate 1 , and bottom ends of the plurality of screw rods 8 all penetrate the support plate 1 and extend to the bottom of the support plate 1 .

[0048] Example 3

[0049] Based on Example 2, see Figure 2 and Fig. 9 As shown, two well water disturbance units 6 for disturbing groundwater in the well are arranged between the support plate 1 and the anti-loosening and collapse mechanism 3. The well water disturbance unit 6 includes a cam 61 fixed on the rotating rod 34. Two moving rods 62 are slidably connected to the top of the support plate 1. An arc strip 63 is fixed between the top ends of the two moving rods 62. The outer surface of the cam 61 is in contact and squeezed with the top of the arc strip 63.

[0050] The outer surfaces of the two moving rods 62 are both sleeved with springs 64, which are used to reset the arc strip 63. The top ends of the two springs 64 are fixed to the top of the arc strip 63, and the bottom ends of the two springs 64 are fixed to the top of the support plate 1.

[0051] The bottom ends of the two movable rods 62 penetrate the support plate 1 and extend to the bottom of the support plate 1. The bottom ends of the two movable rods 62 are fixed with fixed plates 65. The bottoms of the two fixed plates 65 are fixed with mounting rods 66. The bottom ends of the two mounting rods 66 are fixed with circular plates 67. The bottoms of the two circular plates 67 are fixed with multiple support rods 68. A water collecting cone 69 is fixed between the bottom ends of the multiple support rods 68. The water collecting cone 69 is funnel-shaped. After the water collecting cone 69 is immersed in the well water, the well water leaks out from the bottom end of the water collecting cone 69. The repeated water extraction and leakage process of the water collecting cone 69 causes disturbance on the water surface, thereby providing conditions for monitoring.

[0052] Through the setting of the well water disturbance unit 6, when the anti-theft opening and closing mechanism 5 drives the anti-loosening and collapse mechanism 3 to work, the anti-loosening and collapse mechanism 3 can synchronously drive the well water disturbance unit 6 to work, and the three work at the same time with strong linkage. When the well water disturbance unit 6 works, it drives the cam 61 to rotate, and then the cam 61 drives the water containing cone 69 to move up and down in the well water to take water. After taking water, it leaks through the bottom of the water containing cone, thereby creating well water disturbance, and then the water quality changes of the well water under disturbance conditions can be monitored and analyzed, including indicators such as dissolved oxygen, turbidity, and pH value, making the monitoring data more diverse.

[0053] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0054] Working principle: place the whole protection device above the wellhead, align the screw rod 8 with the screw sleeve of the ground base, and screw the screw rod 8 into the screw sleeve to fix the whole device. When the wellhead needs to be protected, start the motor 55, so that the motor 55 drives the gear 1 54 to rotate, and then the gear 1 54 drives the ring 51 to rotate through the outer teeth 53, and then the ring 51 drives the four gears 2 56 to rotate through the inner teeth 52, and then the gear 2 56 drives the four tooth plates 57 to move, and the four tooth plates 57 move toward the center, and finally completely block the through hole 2, thereby realizing the shielding protection of the wellhead. The wellhead can be opened by reversing the motor 55. When it is necessary to compact the soil near the wellhead, the motor 55 is started intermittently in forward and reverse rotation. Through the rotation of the ring 51, the ring 51 drives the annular plate 33 to rotate through the fixing rod 7, and the annular plate 33 drives the rotating rod 34, the arc plate 36, and the connecting rod 34. The column 37 rotates, and when the connecting column 37 rotates into the slide groove 310, the rotation of the annular plate 33 drives the rotating rod 34 and the rotating plate 35 to flip. When the rotating plate 35 flips, the pressing plate 312 is squeezed to move downward, and then the pressing plate 312 drives the vertical rod 42 to move downward in the vertical pipe 41, and then the vertical rod 42 squeezes the compression spring 43, and the pressing plate 312 intermittently reciprocates to compact the soil around the wellhead. Through the rotation of the rotating rod 34, the rotating rod 34 drives the cam 61 to rotate, and the cam 61 drives the arc bar 63 to move downward, and then the arc bar 63 presses the water holding cone 69 into the well water, and then the well water is submerged in the water holding cone 69, and the water holding cone 69 resets and bounces up, and the well water slowly leaks. In this process, the monitoring equipment installed in the wellhead can be used to monitor the disturbed well water and analyze the changes in water quality of the well water under disturbed conditions, including indicators such as dissolved oxygen, turbidity, and pH value.

[0055] The above embodiments of the invention are described in detail, but the contents are only preferred embodiments of the invention and cannot be considered to limit the scope of the invention. All equivalent changes and improvements made within the scope of the invention should still fall within the scope of the invention.

Claims

1. A groundwater monitoring wellhead protection device, comprising a support plate (1), characterized in that: A through hole (2) is formed through the top of the support plate (1), and an anti-loosening and collapse mechanism (3) for automatically compacting the soil around the wellhead is arranged above the support plate (1); The anti-loosening and collapse mechanism (3) comprises a cover shell (31) arranged above the support plate (1); four U-shaped rods (32) are fixed to the top of the cover shell (31); the bottom ends of the four U-shaped rods (32) are fixed to the top of the support plate (1); an annular plate (33) is arranged around the cover shell (31) to cover the cover shell (31); both sides of the outer surface of the annular plate (33) are rotatably connected to rotating rods (34); one end of the two rotating rods (34) is fixed with a rotating plate (35); the other ends of the two rotating rods (34) penetrate the annular plate (33) and extend to the inside of the annular plate (33); the other ends of the two rotating rods (34) are fixed with an arc plate (36); one end of the two arc plates (36) is fixed to the inner side of the annular plate (33); A connecting column (37) is fixed on each side of the cover shell (31); two L-shaped plates (38) are fixed on the top wall of the cover shell (31); a triangular arc plate (39) is fixed on one side of the two L-shaped plates (38); a slide groove (310) is provided between the top of the two triangular arc plates (39) and the bottom of the cover shell (31); two square grooves (311) are provided at the bottom of the cover shell (31); the two square grooves (311) are connected to the slide groove (310); the two connecting columns (37) slide in the slide groove (310); a pressure plate (312) is slidably connected to the outer surface of the support plate (1); and two elastic reset components (4) are provided between the support plate (1) and the pressure plate (312) for driving the pressure plate (312) to reset; Two well water disturbance units (6) for disturbing groundwater in the well are arranged between the support plate (1) and the anti-loosening and collapse mechanism (3). The well water disturbance units (6) include a cam (61) fixed on a rotating rod (34). The top of the support plate (1) is slidably connected to two moving rods (62). An arc-shaped bar (63) is fixed between the top ends of the two moving rods (62). The outer surface of the cam (61) is in contact and pressed with the top of the arc-shaped bar (63). The outer surfaces of the two moving rods (62) are both sleeved with springs (64). The top ends of the two springs (64) are in contact with the arc-shaped bar (63). The top of the two springs (63) is fixed, the bottom ends of the two springs (64) are fixed to the top of the support plate (1), the bottom ends of the two moving rods (62) penetrate the support plate (1) and extend to the bottom of the support plate (1), the bottom ends of the two moving rods (62) are fixed with a fixing plate (65), the bottom ends of the two fixing plates (65) are fixed with a mounting rod (66), the bottom ends of the two mounting rods (66) are fixed with a circular plate (67), the bottom ends of the two circular plates (67) are fixed with a plurality of supporting rods (68), and a water cone (69) is fixed between the bottom ends of the plurality of supporting rods (68).

2. A groundwater monitoring wellhead protection device according to claim 1, characterized in that: The elastic reset assembly (4) comprises a vertical tube (41) fixed to the top of the support plate (1); the top of the vertical tube (41) is slidably connected to a vertical rod (42); the bottom end of the vertical rod (42) extends into the interior of the vertical tube (41); a spring (43) is fixed between the bottom end of the vertical rod (42) and the bottom wall of the vertical tube (41); the top of the vertical rod (42) is fixed to a horizontal plate (44); the bottom of the horizontal plate (44) is fixed to a connecting rod (45); the bottom end of the connecting rod (45) is fixed to the top of the pressure plate (312).

3. A groundwater monitoring wellhead protection device according to claim 1, characterized in that: The top of the support plate (1) is provided with an anti-theft opening and closing mechanism (5) for protecting the wellhead, the anti-theft opening and closing mechanism (5) comprising a ring (51) rotatably connected to the top of the support plate (1), the inner wall of the ring (51) being provided with inner teeth (52), the outer wall of the ring (51) being provided with outer teeth (53), and the top of the support plate (1) being rotatably connected with a gear 1 (54).

4. A groundwater monitoring wellhead protection device according to claim 3, characterized in that: A motor (55) is fixed to the bottom of the support plate (1), and the motor (55) drives gear 1 (54) to rotate, and the gear 1 (54) meshes with the external teeth (53). The top of the support plate (1) is also rotatably connected to four gear 2 (56), and the four gear 2 (56) are all meshed with the internal teeth (52). The top of the support plate (1) is slidably connected to four toothed plates (57), and the four toothed plates (57) are all meshed with gear 2 (56). Four transverse grooves (58) are provided on the top of the support plate (1).

5. A groundwater monitoring wellhead protection device according to claim 4, characterized in that: A vertical rod (59) is fixed to the bottom of each of the four tooth plates (57), the bottom ends of each of the four vertical rods (59) extend into the interior of the transverse groove (58), and each of the four vertical rods (59) is slidably connected to the inner surface of the transverse groove (58).

6. A groundwater monitoring wellhead protection device according to claim 3, characterized in that: A plurality of fixing rods (7) are fixed to the top of the ring (51), the top ends of the plurality of fixing rods (7) are fixed to the bottom of the annular plate (33), a plurality of screw rods (8) are threadedly connected to the support plate (1), the bottom ends of the plurality of screw rods (8) penetrate the support plate (1) and extend to the bottom of the support plate (1).

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