Protective cover for field seismograph

Abstract

The present invention belongs to the technical field of seismographs, and in particular relates to a field seismograph protective cover, comprising a base, an upper side wall of the base being fixedly connected to a seismograph mounting seat, a shell being placed on the upper side wall of the base, a rubber ring being connected to the lower side wall of the shell, and a mounting ring being fixedly connected to the outer wall of the shell. When the seismograph protective cover is used in the field, the present invention can protect the protective cover at the side wall of the protective cover, and can also block part of the sunlight directly hitting the protective cover, slowing down the rate of temperature rise inside the protective cover. When the protective cover is partially damaged due to extreme weather or collision with wild animals, this situation can be automatically detected, and the damaged part of the protective cover can be sealed, thereby preventing rainwater and sand and dust from entering the protective cover through the damaged part, corroding the seismograph circuit, and accelerating the wear of mechanical parts.

Description

Technical Field

[0001] The invention belongs to the technical field of seismographs, and in particular relates to a protective cover for a field seismograph. Background Art

[0002] A seismograph is a crucial instrument for monitoring earthquakes and recording earthquake-related parameters. It contains numerous precision components that are sensitive to drastic changes in temperature, humidity, and air pressure. This is particularly true when installed in remote towns, villages, suburbs, plateaus, mountains, deep forests, or on top of dams, where these components are susceptible to irreversible damage. Therefore, when using a seismograph outdoors, a protective cover is necessary. For example, a protective cover for a seismograph is described in Patent Publication No. CN218728067U.

[0003] Existing field seismograph protective covers are often damaged by extreme weather and collisions with wild animals. Once damaged and not repaired in time, wind noise, rain noise, and noise generated by animal activities will be transmitted through the cracks, which can easily mask weak seismic signals and significantly reduce the data signal-to-noise ratio. At the same time, rain and dust will invade through the damaged areas, corroding precision circuits such as ADC modules and accelerating the wear of mechanical components such as swing arm bearings. Moreover, the internal seals of the protective cover will age over time, and the sealing performance will decline accordingly, further weakening its protective function and seriously affecting the stable operation of the seismograph and the accuracy of data acquisition.

[0004] Therefore, a field seismograph protective cover is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a field seismograph protective cover in view of the above problems.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solutions: a protective cover for a field seismograph, comprising a base, an upper side wall of the base being fixedly connected to a seismograph mounting seat, a housing being placed on the upper side wall of the base, a rubber ring being connected to the lower side wall of the housing, a mounting ring being fixedly connected to the outer wall of the housing, the mounting ring being fixedly connected to the base via bolts, a controller being connected to the lower side wall of the base, and further comprising:

[0007] An anti-collision component is arranged on the outside of the shell and is used to protect the shell;

[0008] The blocking detection component is arranged on the side wall of the shell and is used to detect the damaged position of the shell.

[0009] Preferably, the anti-collision component includes an annular water tank mounted on the outside of the shell, the annular water tank is installed on the outside of the shell by bolts and brackets, the interior of the annular water tank is filled with liquid, the upper inner wall of the annular water tank is fixedly connected to an annular piston plate by a spring, and the liquid is located below the annular piston plate.

[0010] Preferably, the blocking detection component includes an arc-shaped rubber plate arranged inside the shell, the upper side wall of the shell is fixedly connected to a micro motor, the output end of the micro motor passes through the shell and is fixedly connected to the upper side wall of the arc-shaped rubber plate, the outer wall of the shell is fixedly connected to an air pump, the inner wall of the shell is fixedly connected to an annular tube, the inner wall of the annular tube is provided with a plurality of exhaust holes, the air outlet end of the air pump is fixedly connected to an air outlet pipe, an air outlet valve is provided in the air outlet pipe, the lower end of the air outlet pipe passes through the shell and is connected to the annular tube, the side wall of the shell is connected to an air pressure sensor, and the air pressure sensor and the controller are electrically connected.

[0011] Preferably, the outer wall of the shell is fixedly connected to a drying box, the drying box is an openable structure, the interior of the drying box is filled with desiccant, the air inlet end of the air pump is connected to the drying box, the side wall of the drying box is fixedly connected to an air inlet pipe, the side wall of the shell is fixedly connected to a heat dissipation pipe, and a regulating valve is provided in the heat dissipation pipe.

[0012] Preferably, the upper end of the arc-shaped rubber plate is fixedly connected to a conductive frame, the conductive frame is electrically connected to an external power supply through a controller, a plurality of conductive plates are inlaid on the upper inner wall of the shell, a plurality of annularly distributed indicator lights are fixedly connected to the upper side wall of the shell, and the conductive plates and corresponding indicator lights are electrically connected.

[0013] Preferably, a leveling seat is provided under the base, and support frames are fixedly connected to the left and right sides of the leveling seat, a placement cavity is provided inside the leveling seat, a leveling ball is placed in the placement cavity, a plurality of ball bearings are fixedly connected to the inner wall of the placement cavity, a plurality of clamping grooves are provided on the inner wall of the placement cavity, and a clamping electric push rod is fixedly connected to the inner wall of the clamping groove, and the moving end of the clamping electric push rod is fixedly connected to the clamping seat that matches the leveling seat, a vertical pipe is fixedly inserted into the interior of the leveling ball, the upper end of the vertical pipe is fixedly connected to the base, the lower end of the vertical pipe is fixedly connected to a counterweight cylinder, and the lower side wall of the counterweight cylinder is fixedly connected to a counterweight block, and the counterweight cylinder is connected to the annular water tank through a pipeline assembly.

[0014] Preferably, the pipeline assembly includes a bent pipe connected to the air outlet pipe, a magnetic control valve is provided in the bent pipe, an air pressure pipe is fixedly plugged into the side wall of the base, the air pressure pipe is fixedly connected to the lower end of the bent pipe through a threaded connecting piece, the lower end of the air pressure pipe passes through the vertical pipe and is connected to the side wall of the counterweight cylinder near the lower side, the inner wall of the counterweight cylinder is fixedly connected to a retaining ring, and a piston seat is placed on the retaining ring, the side wall of the counterweight cylinder is fixedly connected to a pressure relief pipe, and a pressure relief valve is provided in the pressure relief pipe, the lower inner wall of the counterweight cylinder is provided with a pressure sensor, the pressure sensor and the controller are electrically connected, the lower side wall of the annular water tank is fixedly connected to a short pipe, the side wall of the base is fixedly plugged with an infusion pipe, an infusion valve is provided in the infusion pipe, the upper end of the infusion pipe is fixedly connected to the lower end of the short pipe through a threaded connecting piece, and the lower end of the infusion pipe is connected to the vertical pipe.

[0015] Preferably, two level sensors are connected to the upper side wall of the base, and both of the level sensors are electrically connected to the controller.

[0016] Compared with the existing technology, the advantages of a field seismograph protective cover are:

[0017] 1. By setting up the anti-collision component, when the seismograph protective cover is used in the field, the side wall of the protective cover can be used to protect the protective cover, and part of the sunlight directly hitting the protective cover can be blocked, thereby slowing down the temperature rise inside the protective cover.

[0018] 2. Through the setting of the blocking detection component, when the protective cover is partially damaged due to extreme weather or collision with wild animals, it can automatically detect this situation and block the damaged part of the protective cover, thereby preventing rainwater and sand and dust from entering the protective cover through the damaged part, corroding the seismograph circuit, and accelerating the wear of mechanical parts.

[0019] 3. Through the set pipeline assembly, vertical pipe, counterweight cylinder, counterweight block, pipeline assembly, elbow, magnetic control valve, air pressure tube, retaining ring, piston seat, pressure relief pipe, and pressure relief valve, when the protective cover and the seismograph deviate from the installation position due to factors such as impact from external objects in the field, the seismograph and the protective cover can be automatically adjusted to a horizontal position, thereby avoiding changes in the sensitivity of the sensors inside the seismograph in the horizontal and vertical directions, resulting in deviations in the amplitude, phase and frequency of the recorded seismic wave signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a protective cover for a field seismograph provided by the present invention;

[0021] Figure 2 This is a schematic diagram of the positional relationship between the shell and the base in a protective cover of a field seismograph provided by the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of a shell in a protective cover of a field seismograph provided by the present invention;

[0023] Figure 4 This is a schematic diagram of the positional relationship between a drying box and an air intake pipe in a protective cover of a field seismograph provided by the present invention;

[0024] Figure 5 This is a structural schematic diagram of a blocking detection assembly in a protective cover of a field seismograph provided by the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of a leveling seat in a protective cover of a field seismograph provided by the present invention;

[0026] Figure 7 The present invention provides a schematic diagram of the internal structure of a counterweight cylinder in a protective cover of a field seismograph.

[0027] In the figure: 1 base, 2 seismograph mounting base, 3 housing, 4 rubber ring, 5 mounting ring, 6 controller, 7 anti-collision component, 71 annular water tank, 72 annular piston plate, 8 blocking detection component, 81 curved rubber plate, 82 micro motor, 9 air pump, 10 annular pipe, 11 outlet pipe, 12 outlet valve, 13 air pressure sensor, 14 drying box, 15 intake pipe, 16 heat pipe, 17 regulating valve, 18 conductive frame, 19 conductive plate, 20 finger Indicator light, 21 leveling seat, 22 support frame, 23 placement cavity, 24 leveling ball, 25 ball, 26 clamping electric push rod, 27 clamping seat, 28 vertical pipe, 29 counterweight cylinder, 30 counterweight block, 31 pipeline assembly, 311 elbow, 312 magnetic control valve, 32 air pressure tube, 33 retaining ring, 34 piston seat, 35 pressure relief pipe, 36 pressure relief valve, 37 pressure sensor, 38 short tube, 39 infusion tube, 40 infusion valve, 41 level sensor. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] like Figure 1-Figure 7 As shown, a field seismograph protective cover includes a base 1, a seismograph mounting base 2 is fixedly connected to the upper side wall of the base 1, a shell 3 is placed on the upper side wall of the base 1, a rubber ring 4 is connected to the lower side wall of the shell 3, a mounting ring 5 is fixedly connected to the outer wall of the shell 3, and the mounting ring 5 is fixedly connected to the base 1 by bolts. The lower side wall of the base 1 is connected to a controller 6, and further includes:

[0030] The anti-collision component 7 is arranged on the outside of the shell 3 and is used to protect the shell 3. The anti-collision component 7 includes an annular water tank 71 sleeved on the outside of the shell 3. The annular water tank 71 is installed on the outside of the shell 3 by bolts and brackets. The interior of the annular water tank 71 is filled with liquid. The upper inner wall of the annular water tank 71 is fixedly connected to an annular piston plate 72 by a spring. The liquid is located below the annular piston plate 72. When the seismograph protective cover is used in the field, the side wall of the protective cover can be used to protect the protective cover and can also block some of the sunlight directly hitting the protective cover, slowing down the rate of temperature rise inside the protective cover.

[0031] The blocking detection component 8 is arranged on the side wall of the shell 3 and is used to detect the damaged position of the shell 3. The blocking detection component 8 includes an arc-shaped rubber plate 81 arranged inside the shell 3. The upper side wall of the shell 3 is fixedly connected to a micro motor 82. The output end of the micro motor 82 passes through the shell 3 and is fixedly connected to the upper side wall of the arc-shaped rubber plate 81. The outer wall of the shell 3 is fixedly connected to the air pump 9. The inner wall of the shell 3 is fixedly connected to the ring tube 10. The inner wall of the ring tube 10 is provided with a plurality of exhaust holes. The outlet end of the air pump 9 is fixedly connected to the outlet pipe. 11. An air outlet valve 12 is provided in the air outlet pipe 11. The lower end of the air outlet pipe 11 passes through the shell 3 and is connected to the ring pipe 10. The side wall of the shell 3 is connected to an air pressure sensor 13. The air pressure sensor 13 is electrically connected to the controller 6. When the protective cover is partially damaged due to extreme weather or collision with wild animals, this situation can be automatically detected, and the damaged part of the protective cover can be sealed, thereby avoiding rainwater and sand and dust from entering the protective cover through the damaged part, corroding the seismograph circuit, and accelerating the wear of mechanical parts.

[0032] The outer wall of the shell 3 is fixedly connected to a drying box 14, and the interior of the drying box 14 is filled with desiccant. The drying box 14 is an openable structure, and the operator can open the drying box 14 regularly to replace the desiccant. The air inlet end of the air pump 9 is connected to the drying box 14, and the side wall of the drying box 14 is fixedly connected to an air inlet pipe 15. The side wall of the shell 3 is fixedly connected to a heat dissipation pipe 16, and a regulating valve 17 is provided in the heat dissipation pipe 16, which can dry the air entering the shell 3.

[0033] The upper end of the arc-shaped rubber plate 81 is fixedly connected to a conductive frame 18, which is electrically connected to an external power supply through a controller 6 and a conductive slip ring component. A plurality of conductive plates 19 are inlaid on the upper inner wall of the shell 3, and a plurality of annularly distributed indicator lights 20 are fixedly connected to the upper side wall of the shell 3. The conductive plates 19 and the corresponding indicator lights 20 are electrically connected, which can guide the operator to the location of the damage to the shell 3.

[0034] A leveling seat 21 is provided below the base 1, and support frames 22 are fixedly connected to the left and right sides of the leveling seat 21. Two level sensors 41 are connected to the upper side wall of the base 1, and the two level sensors 41 are electrically connected to the controller 6. A placement cavity 23 is provided inside the leveling seat 21, and a leveling ball 24 is placed in the placement cavity 23. A plurality of balls 25 are fixedly connected to the inner wall of the placement cavity 23, and a plurality of clamping grooves are provided on the inner wall of the clamping groove, and a clamping electric push rod 26 is fixedly connected to the inner wall of the clamping groove. The moving end of the clamping electric push rod 26 is fixed. A clamping seat 27 that matches the leveling seat 21 is connected, a vertical pipe 28 is fixedly inserted into the interior of the leveling ball 24, the upper end of the vertical pipe 28 is fixedly connected to the base 1, the lower end of the vertical pipe 28 is fixedly connected to a counterweight cylinder 29, and the lower side wall of the counterweight cylinder 29 is fixedly connected to a counterweight block 30, the counterweight cylinder 29 is connected to the annular water tank 71 through a pipe assembly 31, the pipe assembly 31 includes a bend pipe 311 connected to the air outlet pipe 11, a magnetic control valve 312 is provided in the bend pipe 311, and an air pressure pipe 32 is fixedly inserted into the side wall of the base 1, and the air pressure pipe 32 is connected to the annular water tank 71 through a threaded connection. The lower end of the component and the elbow 311 are fixedly connected, the lower end of the air pressure tube 32 passes through the vertical pipe 28 and is connected to the side wall of the counterweight cylinder 29 near the lower side, the inner wall of the counterweight cylinder 29 is fixedly connected with a retaining ring 33, and a piston seat 34 is placed on the retaining ring 33, the side wall of the counterweight cylinder 29 is fixedly connected with a pressure relief pipe 35, and a pressure relief valve 36 is provided in the pressure relief pipe 35, and a pressure sensor 37 is provided on the lower inner wall of the counterweight cylinder 29. The pressure sensor 37 is electrically connected to the controller 6, the lower side wall of the annular water tank 71 is fixedly connected with a short pipe 38, and the side wall of the base 1 is fixedly plugged with An infusion tube 39 is provided with an infusion valve 40. The upper end of the infusion tube 39 is fixedly connected to the lower end of the short tube 38 through a threaded connecting piece, and the lower end of the infusion tube 39 is connected to the vertical pipe 28. When the protective cover and the seismograph deviate from the installation position due to factors such as impact from external objects in the field, the seismograph and the protective cover can be automatically adjusted to a horizontal position, thereby avoiding changes in the sensitivity of the sensors inside the seismograph in the horizontal and vertical directions, resulting in deviations in the amplitude, phase and frequency of the recorded seismic wave signals.

[0035] The operating principle of the present invention is now described as follows: the support frame 22 is installed to the designated location in the field, and then the seismograph is installed in the seismograph mounting base 2. Next, the shell 3 is sleeved on the outside of the seismograph, and then the mounting ring 5 is fixed by bolts, and the shell 3 is installed on the base 1. Then the operator installs the annular water tank 71 on the outside of the shell 3 through the bracket and bolts. Then the operator connects the elbow 311 and the air pressure tube 32, the short tube 38 and the infusion tube 39 respectively through the threaded connecting parts. Then, the operator adjusts the placement angle of the base 1 and the seismograph (the levelness of the base 1 is detected by two level sensors 41, and the detection results are transmitted to the receiving end through the wireless module inside the controller 6. The operator adjusts the horizontal position of the base 1 according to the data on the receiving end, so that the inclination angle of the base 1 is ≤0.05°). Since the annular water tank 71 is filled with liquid, the annular water tank 71 can have a certain buffering capacity. When the shell 3 is hit by foreign objects, the annular water tank 71 can be used to improve the protection ability of the shell 3;

[0036] A temperature sensor is provided inside the housing 3. When the controller 6 detects through the temperature sensor that the temperature inside the housing 3 is high (exceeding 50°C), the controller 6 controls the regulating valve 17 and the air outlet valve 12 to open, and controls the air pump 9 to operate. The air pump 9 transports the gas dried by the drying oven 14 from the outside to the ring pipe 10 through the air outlet pipe 11, and then transports the gas into the housing 3 through the ring pipe 10, so that the heat in the housing 3 is discharged through the heat dissipation pipe 16, thereby reducing the heat inside the housing 3.

[0037] When the controller 6 detects through the temperature sensor that the temperature inside the shell 3 is lower than 50°C, the controller 6 will control the regulating valve 17 to close. At this time, the air pump 9 is still in operation and continues to transport external air into the shell 3. When the controller 6 detects through the air pressure sensor 13 that the air pressure inside the shell 3 reaches the set threshold (0.3 standard atmospheric pressure), the controller 6 will control the air pump 9 to stop working and control the air outlet valve 12 to close, so that the air pressure inside the shell 3 increases, thereby improving the impact resistance of the shell 3.

[0038] When the shell 3 is damaged due to extreme environment or collision with wild animals, the air pressure inside the shell 3 will automatically decrease. After the controller 6 detects this through the air pressure sensor 13, the controller 6 will control the air pump 9 to work and control the air outlet valve 12 to open, so as to transport the external gas to the shell 3, thereby increasing the air pressure inside the shell 3. At the same time, the controller 6 will also control the micro motor 82 to work, and the micro motor 82 will drive the arc rubber plate 81 to work. When the arc rubber plate 81 moves to the damaged part of the shell 3, the damaged part of the shell 3 will be blocked, and the air pressure inside the shell 3 will rise rapidly. The controller 6 will control the air pump 9 to work and control the air outlet valve 12 to open, thereby transporting the external gas to the shell 3, thereby increasing the air pressure inside the shell 3. After the pressure sensor 13 detects this situation, it will control the air pump 9 and the micro motor 82 to stop working, and control the conductive frame 18 to be electrically connected to the external power supply (the conductive frame 18 is electrically connected to the external power supply through components such as conductive slip rings). During the movement of the conductive frame 18, it will contact multiple conductive plates 19, and the conductive plates 19 are electrically connected to the corresponding indicator lights 20 (the conductive plate 19 on the left is electrically connected to the indicator light 20 on the right). The external current will be transmitted to the corresponding indicator light 20 through the conductive plates 19, causing the corresponding indicator light 20 to light up, making it easier for the operator to quickly find the damaged area on the surface of the shell 3 later;

[0039] When the controller 6 detects that the installation positions of the base 1 and the seismograph are offset through the two level sensors 41, the controller 6 will control the infusion valve 40 and the pressure relief valve 36 to open under the condition of weak wind in the surrounding environment (the controller 6 detects the wind force in the environment through an external wind sensor, and will only take subsequent actions when the wind force is less than level two). The liquid inside the annular water tank 71 will be transported to the counterweight cylinder 29 through the short tube 38, the infusion tube 39 and the vertical pipe 28 under the force of gravity and the squeezing of the annular piston plate 72, so that the weight inside the counterweight cylinder 29 increases. At the same time, the controller 6 will also control the operation of multiple clamping electric push rods 26, so that the clamping electric push rods 26 drive the clamping seat 27 and the leveling ball 24 to separate, and release the limit on the leveling ball 24. Under the action of gravity, the leveling ball 24 will rotate a certain angle in the leveling seat 21, so that the base 1 and the seismograph are restored to a horizontal state, and the controller 6 will After the controller 6 detects this situation through the level sensor 41, it will control multiple clamping electric push rods 26 to work, and the clamping electric push rods 26 drive the clamping seat 27 and the leveling ball 24 to squeeze and limit. Then the controller 6 controls the air pump 9 to work, and controls the magnetic control valve 312 to open, and controls the pressure relief valve 36 to close, so that the external gas is transported to the counterweight cylinder 29 through the outlet pipe 11 and the air pressure pipe 32, so that the air pressure under the piston seat 34 increases. Under the action of the air pressure, the piston seat 34 will push the liquid upward, so that the liquid will flow back to the annular water tank 71 through the infusion pipe 39 and the short pipe 38. When the pressure sensor 37 detects that the air pressure under the piston seat 34 reaches the set threshold (1 standard atmospheric pressure), it indicates that the piston seat 34 has moved to the uppermost end, and the controller 6 will control the air pump 9 to stop working, and control the infusion valve 40 and the magnetic control valve 312 to close, thereby completing the leveling work of the base 1 and the seismograph.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A field seismograph protective cover, comprising a base (1), wherein the upper side wall of the base (1) is fixedly connected to a seismograph mounting seat (2), a shell (3) is placed on the upper side wall of the base (1), a rubber ring (4) is connected to the lower side wall of the shell (3), a mounting ring (5) is fixedly connected to the outer wall of the shell (3), the mounting ring (5) is fixedly connected to the base (1) by bolts, and a controller (6) is connected to the lower side wall of the base (1), characterized in that: Also includes: An anti-collision component (7), arranged on the outside of the shell (3) and used for protecting the shell (3); A blocking detection assembly (8) is provided on the side wall of the housing (3) for detecting a damaged position of the housing (3); The blocking detection component (8) includes an arc-shaped rubber plate (81) arranged inside the shell (3), the upper side wall of the shell (3) is fixedly connected to a micro motor (82), the output end of the micro motor (82) passes through the shell (3) and is fixedly connected to the upper side wall of the arc-shaped rubber plate (81), the outer wall of the shell (3) is fixedly connected to an air pump (9), the inner wall of the shell (3) is fixedly connected to an annular tube (10), the inner wall of the annular tube (10) is provided with a plurality of exhaust holes, the outlet end of the air pump (9) is fixedly connected to an outlet pipe (11), an outlet valve (12) is provided in the outlet pipe (11), and the outlet pipe (11) is provided with an outlet valve (12). ) passes through the shell (3) and is connected to the ring tube (10), the side wall of the shell (3) is connected to an air pressure sensor (13), and the air pressure sensor (13) is electrically connected to the controller (6); the outer wall of the shell (3) is fixedly connected to a drying box (14), the drying box (14) is an openable structure, the interior of the drying box (14) is filled with a desiccant, the air inlet end of the air pump (9) is connected to the drying box (14), the side wall of the drying box (14) is fixedly connected to an air inlet pipe (15), the side wall of the shell (3) is fixedly connected to a heat dissipation pipe (16), and a regulating valve (17) is provided in the heat dissipation pipe (16).

2. A protective cover for a field seismograph according to claim 1, characterized in that: The anti-collision assembly (7) comprises an annular water tank (71) sleeved on the outside of the housing (3), the annular water tank (71) being mounted on the outside of the housing (3) via bolts and brackets, the interior of the annular water tank (71) being filled with liquid, the upper inner wall of the annular water tank (71) being fixedly connected to an annular piston plate (72) via a spring, and the liquid being located below the annular piston plate (72).

3. A protective cover for a field seismograph according to claim 1, characterized in that: The upper end of the arc-shaped rubber plate (81) is fixedly connected to a conductive frame (18), and the conductive frame (18) is electrically connected to an external power supply through a controller (6). The upper inner wall of the shell (3) is inlaid with a plurality of conductive plates (19), and the upper side wall of the shell (3) is fixedly connected to a plurality of annularly distributed indicator lights (20), and the conductive plates (19) are electrically connected to the corresponding indicator lights (20).

4. A protective cover for a field seismograph according to claim 2, characterized in that: A leveling seat (21) is provided below the base (1), and support frames (22) are fixedly connected to the left and right sides of the leveling seat (21). A placement cavity (23) is provided inside the leveling seat (21), and a leveling ball (24) is placed in the placement cavity (23). A plurality of balls (25) are fixedly connected to the inner wall of the placement cavity (23). A plurality of clamping grooves are provided on the inner wall of the clamping grooves, and a clamping electric push rod (26) is fixedly connected to the inner wall of the clamping grooves. The movable end of the electric push rod (26) is fixedly connected to a clamping seat (27) that matches the leveling seat (21), and a vertical pipe (28) is fixedly inserted into the interior of the leveling ball (24). The upper end of the vertical pipe (28) is fixedly connected to the base (1), and the lower end of the vertical pipe (28) is fixedly connected to a counterweight cylinder (29), and the lower side wall of the counterweight cylinder (29) is fixedly connected to a counterweight block (30). The counterweight cylinder (29) is connected to the annular water tank (71) through a pipeline assembly (31).

5. A protective cover for a field seismograph according to claim 4, characterized in that: The pipeline assembly (31) includes a bend pipe (311) connected to the air outlet pipe (11), a magnetic control valve (312) is provided in the bend pipe (311), a pressure pipe (32) is fixedly connected to the side wall of the base (1), the pressure pipe (32) is fixedly connected to the lower end of the bend pipe (311) through a threaded connecting piece, the lower end of the pressure pipe (32) passes through the vertical pipe (28) and is connected to the side wall of the counterweight cylinder (29) near the lower side, the inner wall of the counterweight cylinder (29) is fixedly connected to a retaining ring (33), and a piston seat (34) is placed on the retaining ring (33), and the side wall of the counterweight cylinder (29) is fixed. A pressure relief pipe (35) is connected, and a pressure relief valve (36) is provided in the pressure relief pipe (35). A pressure sensor (37) is provided on the lower inner wall of the counterweight cylinder (29). The pressure sensor (37) is electrically connected to the controller (6). A short pipe (38) is fixedly connected to the lower side wall of the annular water tank (71). An infusion pipe (39) is fixedly plugged into the side wall of the base (1). An infusion valve (40) is provided in the infusion pipe (39). The upper end of the infusion pipe (39) is fixedly connected to the lower end of the short pipe (38) through a threaded connecting piece, and the lower end of the infusion pipe (39) is connected to the vertical pipe (28).

6. A protective cover for a field seismograph according to claim 5, characterized in that: Two level sensors (41) are connected to the upper side wall of the base (1), and both of the level sensors (41) are electrically connected to the controller (6).

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