Hydraulic adjustment supporting structure and seismometer automatic leveling device

Abstract

The utility model discloses a hydraulic adjustment supporting structure and a seismometer automatic leveling device, and relates to the technical field of seismometers, the seismometer automatic leveling device provided by the utility model realizes leveling of a seismometer in a hydraulic mode, leveling can be completed in a small range through hydraulic control, and the seismometer automatic leveling device is simple in structure and convenient to use. The leveling precision of the hydraulic cylinder is higher than that of a threaded connection mode, operation is easier, the leveling process is more stable, the hydraulic cylinder can keep stable for a long time after a liquid path is closed, the hydraulic cylinder is not prone to being affected by vibration and losing efficacy, the hydraulic cylinder is not prone to being corroded and damaged, and the maintenance period can be greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of seismometers, in particular to a hydraulic adjustment support structure and an automatic leveling device for a seismometer. Background Art

[0002] Seismometer leveling is a very important part of earthquake monitoring. The role of seismometer leveling is to calibrate the seismic instrument. Leveling can reduce instrument errors, ensure that the instrument can accurately record seismic signals, improve the quality of seismic monitoring data, ensure the accuracy and reliability of seismic monitoring, and thus timely and effectively warn and mitigate earthquake disasters. It can also provide reliable data support for earthquake warning and scientific research.

[0003] The existing seismometers are often leveled by screws, nuts, etc. in combination with threads, and are adjusted through threaded connections. Not only is the adjustment cumbersome and the accuracy limited, but the threaded connection parts are easily affected by factors such as ambient temperature and humidity, and are susceptible to corrosion and damage when left for a long time. The connections are also prone to loosening and misalignment due to environmental vibrations, requiring personnel to perform regular leveling maintenance. Utility Model Content

[0004] The purpose of the utility model is: to address the above-mentioned problems, the utility model provides a hydraulic adjustment support structure and an automatic leveling device for a seismometer, which realizes the leveling of the seismometer by hydraulic means. The hydraulic control can complete the leveling within a small range, and the leveling accuracy is higher than that of the threaded connection method. The operation is simpler and the leveling process is more stable. The hydraulic cylinder can maintain long-term stability after the liquid circuit is closed, is not easily affected by vibration and fails, and is not easily damaged by corrosion, which can greatly extend the maintenance cycle.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A hydraulic adjustment support structure comprises a hydraulic cylinder, a hydraulic drive unit, a support unit and a target adjustment device, wherein the hydraulic cylinder is mounted on the target adjustment device, the support unit is mounted on and follows the hydraulic rod of the hydraulic cylinder, the hydraulic drive unit is connected to and acts on the hydraulic cylinder, and the hydraulic drive unit can drive the support unit to extend or retract the target adjustment device by driving the hydraulic cylinder; the hydraulic drive unit comprises a liquid inlet, a liquid outlet, a regulating valve, a hydraulic pump and an oil tank, one end of the liquid inlet is connected to the hydraulic pump, the other end is connected to the regulating valve, and one end of the liquid outlet is connected to the hydraulic pump. It is connected to the oil tank and the other end is connected to the regulating valve; the regulating valve includes a raising position, a locking position and a lowering position. When the valve core of the regulating valve moves to the raising position, the fluid inlet circuit is connected to the rodless chamber of the hydraulic cylinder, and the fluid outlet circuit is connected to the rod chamber of the hydraulic cylinder, and the hydraulic pump can drive the hydraulic rod to extend the supporting unit; when the valve core of the regulating valve moves to the lowering position, the fluid inlet circuit is connected to the rod chamber of the hydraulic cylinder, and the fluid outlet circuit is connected to the rodless chamber of the hydraulic cylinder, and the hydraulic pump can drive the hydraulic rod to retract the supporting unit; when the valve core of the regulating valve moves to the locking position, both the fluid inlet circuit and the fluid outlet circuit are not connected to the hydraulic cylinder.

[0007] Furthermore, the number of the supporting units is several, the fluid inlet circuit of the hydraulic cylinder includes a main fluid inlet circuit and several fluid inlet branches, the fluid outlet circuit of the hydraulic cylinder includes a main fluid outlet circuit and several fluid outlet branches, the number of the hydraulic cylinders, regulating valves, fluid inlet branches and fluid outlet branches all correspond to the supporting units, and the fluid inlet branches and fluid outlet branches are all connected to the corresponding hydraulic cylinders through corresponding regulating valves; one end of the fluid inlet main circuit is connected to the hydraulic pump, and the other end is connected in parallel to several fluid inlet branches; one end of the fluid outlet main circuit is connected to the oil tank, and the other end is connected in parallel to several fluid outlet branches.

[0008] Furthermore, a throttle valve is provided on the main liquid inlet path.

[0009] Furthermore, a control valve is provided on the main liquid inlet path, and the control valve includes a start position and a lock position; when the valve core of the control valve moves to the start position, the main liquid inlet path is connected; when the valve core of the control valve moves to the lock position, the main liquid inlet path is closed.

[0010] Furthermore, an overflow valve is provided on the main liquid outlet path.

[0011] Furthermore, a reflux branch is arranged between the overflow valve and the oil cylinder. When the valve core of the control valve moves to the locking position, the hydraulic pump is connected to the reflux branch through the control valve. When the valve core of the control valve moves to the starting position, the control valve closes the reflux branch.

[0012] A seismometer automatic leveling device comprises a seismometer support, the seismometer support comprises a relatively arranged leveling plane and an assembly plane, and also comprises a hydraulic cylinder, a hydraulic drive unit and more than two support units, the hydraulic drive unit comprises a liquid inlet, a liquid outlet, a regulating valve, a hydraulic pump and an oil tank, the liquid inlet comprises a main liquid inlet and a plurality of liquid inlet branches, the liquid outlet comprises a main liquid outlet and a plurality of liquid outlet branches, the number of the hydraulic cylinders, regulating valves, liquid inlet branches and liquid outlet branches all corresponds to the number of support units, the liquid inlet branches and liquid outlet branches are all connected to the corresponding hydraulic cylinders through the corresponding regulating valves; one end of the liquid inlet main road is connected to the hydraulic pump, and the other end is connected in parallel to the plurality of liquid inlet branches; one end of the liquid outlet main road is connected to the oil tank, and the other end is connected in parallel to the plurality of liquid outlet branches ; The hydraulic cylinder is assembled on the seismometer support, the supporting unit is assembled and follows the hydraulic rod of the hydraulic cylinder, the hydraulic drive unit is connected to and acts on the hydraulic cylinder, and the hydraulic drive unit can drive the supporting unit to extend or retract the assembly surface of the seismometer support by driving the hydraulic cylinder; the regulating valve includes a raising position, a locking position and a lowering position. When the valve core of the regulating valve moves to the raising position, the fluid inlet circuit is connected with the rodless chamber of the hydraulic cylinder, and the fluid outlet circuit is connected with the rod chamber of the hydraulic cylinder, and the hydraulic pump can drive the hydraulic rod to extend the supporting unit; when the valve core of the regulating valve moves to the lowering position, the fluid inlet circuit is connected with the rod chamber of the hydraulic cylinder, and the fluid outlet circuit is connected with the rodless chamber of the hydraulic cylinder, and the hydraulic pump can drive the hydraulic rod to retract the supporting unit; when the valve core of the regulating valve moves to the locking position, both the fluid inlet circuit and the fluid outlet circuit are not connected with the hydraulic cylinder.

[0013] Furthermore, the seismometer support is a cylindrical structure, and the adjustment plane and the assembly surface correspond to the two end surfaces of the axial direction of the seismometer support respectively.

[0014] Furthermore, the number of the support units is three, and the three support units are evenly distributed on the seismometer support at an angle of 120 degrees along the circumference; a liquid leveling reference device is provided on the adjustment plane, and the liquid leveling reference device includes a closed cavity, and the closed cavity is filled with a leveling indicator liquid, and the leveling indicator liquid forms a leveling bubble in the closed cavity for indicating the leveling state of the seismometer support.

[0015] Furthermore, the regulating valve is an electric valve, and each of the regulating valves is connected to the control device via a signal.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] The utility model realizes the leveling of the seismometer by hydraulic means. The hydraulic control can complete the leveling within a small range. The leveling accuracy is higher than that of the threaded connection method, and the operation is simpler and the leveling process is more stable. The hydraulic cylinder can maintain long-term stability after the liquid circuit is closed, is not easily affected by vibration and fails, and is not easily damaged by corrosion, which can greatly extend the maintenance cycle.

[0018] The utility model can correspond to the extension, stillness and retraction of the support unit by adjusting the raised position, locked position and lowered position of the valve, the adjustment process is simple, and remote adjustment can be realized.

[0019] The utility model ensures a smooth hydraulic adjustment process by arranging a throttle valve on the main liquid inlet path and an overflow valve on the main liquid outlet path, thereby effectively avoiding impact loads during startup and shutdown.

[0020] The utility model is provided with a control valve on the main liquid inlet route, which realizes double limitation with the locking position of the regulating valve, ensures that the hydraulic drive unit can still effectively lock the hydraulic cylinder when placed for a long time, and greatly prolongs the maintenance cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the hydraulic drive unit of the utility model;

[0022] Figure 2 This is the front view of the seismometer support of the utility model;

[0023] Figure 3 It is a top view of the seismometer support of the utility model.

[0024] Markings in the figure: 1-hydraulic cylinder, 2-hydraulic drive unit, 201-liquid inlet line, 202-liquid outlet line, 203-return branch, 3-support unit, 4-seismometer support, 401-liquid leveling reference device, 5-regulating valve, 6-hydraulic pump, 7-oil tank, 8-throttle valve, 9-control valve, 10-overflow valve. DETAILED DESCRIPTION

[0025] The utility model is described in detail below in conjunction with the accompanying drawings.

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] Example 1

[0028] A hydraulically adjustable support structure, such as Figure 1-3As shown, it includes a hydraulic cylinder 1, a hydraulic drive unit 2, a support unit 3 and a target adjustment device, wherein the hydraulic cylinder 1 is mounted on the target adjustment device, the support unit 3 is mounted on and follows the hydraulic rod of the hydraulic cylinder 1, the hydraulic drive unit 2 is connected to and acts on the hydraulic cylinder 1, and the hydraulic drive unit 2 can drive the support unit 3 to extend or retract the target adjustment device by driving the hydraulic cylinder 1; the hydraulic drive unit 2 includes a liquid inlet 201, a liquid outlet 202, a regulating valve 5, a hydraulic pump 6 and an oil tank 7, one end of the liquid inlet 201 is connected to the hydraulic pump 6, and the other end is connected to the regulating valve 5, and one end of the liquid outlet 202 is connected to the oil tank 7 , the other end is connected to the regulating valve 5; the regulating valve 5 includes a raising position, a locking position and a lowering position. When the valve core of the regulating valve 5 moves to the raising position, the liquid inlet path 201 is connected with the rodless chamber of the hydraulic cylinder 1, and the liquid outlet path 202 is connected with the rod chamber of the hydraulic cylinder 1, and the hydraulic pump 6 can drive the hydraulic rod to extend the supporting unit 3; when the valve core of the regulating valve 5 moves to the lowering position, the liquid inlet path 201 is connected with the rod chamber of the hydraulic cylinder 1, and the liquid outlet path 202 is connected with the rodless chamber of the hydraulic cylinder 1, and the hydraulic pump 6 can drive the hydraulic rod to retract the supporting unit 3; when the valve core of the regulating valve 5 moves to the locking position, the liquid inlet path 201 and the liquid outlet path 202 are not connected with the hydraulic cylinder 1.

[0029] The number of the support units 3 is several, the liquid inlet circuit 201 of the hydraulic cylinder 1 includes a main liquid inlet circuit and several liquid inlet branches, the liquid outlet circuit 202 of the hydraulic cylinder 1 includes a main liquid outlet circuit and several liquid outlet branches, the number of the hydraulic cylinders 1, the regulating valves 5, the liquid inlet branches and the liquid outlet branches all correspond to the number of the support units 3, and the liquid inlet branches and the liquid outlet branches are connected to the corresponding hydraulic cylinders 1 through the corresponding regulating valves 5; one end of the liquid inlet main circuit is connected to the hydraulic pump 6, and the other end is connected in parallel to several liquid inlet branches; one end of the liquid outlet main circuit is connected to the oil tank 7, and the other end is connected in parallel to several liquid outlet branches.

[0030] A throttle valve 8 is provided on the main liquid inlet path.

[0031] A control valve 9 is arranged on the main liquid inlet path, and the control valve 9 includes a start position and a lock position; when the valve core of the control valve 9 moves to the start position, the main liquid inlet path is connected; when the valve core of the control valve 9 moves to the lock position, the main liquid inlet path is closed.

[0032] An overflow valve 10 is provided on the main liquid outlet path.

[0033] A reflux branch 203 is provided between the overflow valve 10 and the oil cylinder. When the valve core of the control valve 9 moves to the locking position, the hydraulic pump 6 is connected to the reflux branch 203 through the control valve 9. When the valve core of the control valve 9 moves to the starting position, the control valve 9 closes the reflux branch 203.

[0034] Example 2

[0035] An automatic leveling device for a seismometer, such as Figure 1-3 As shown, it includes a seismometer support 4, which includes a relatively arranged adjustment plane and an assembly surface, and also includes a hydraulic cylinder 1, a hydraulic drive unit 2 and three support units 3. The hydraulic drive unit 2 includes a liquid inlet circuit 201, a liquid outlet circuit 202, a regulating valve 5, a hydraulic pump 6 and an oil tank 7. The liquid inlet circuit 201 includes a liquid inlet main circuit and three liquid inlet branches, and the liquid outlet circuit 202 includes a liquid outlet main circuit and three liquid outlet branches. The number of the hydraulic cylinder 1 and the regulating valve 5 is three, and the liquid inlet branches and the liquid outlet branches are connected to the corresponding hydraulic cylinder 1 through the corresponding regulating valve 5; one end of the liquid inlet main circuit is connected to the hydraulic pump 6, and the other end is connected in parallel to the three liquid inlet branches; one end of the liquid outlet main circuit is connected to the oil tank 7, and the other end is connected in parallel to the three liquid outlet branches; the hydraulic cylinder 1 is assembled on the seismometer support 4, and the support unit 3 is assembled and follows the hydraulic cylinder 1 The hydraulic rod, the hydraulic drive unit 2 is connected to and acts on the hydraulic cylinder 1, and the hydraulic drive unit 2 can drive the support unit 3 to extend or retract the assembly surface of the seismometer support 4 by driving the hydraulic cylinder 1; the regulating valve 5 includes a raised position, a locked position and a lowered position. When one side of the regulating valve 5 is energized, the valve core of the regulating valve 5 moves to the raised position, the inlet line 201 is connected to the rodless chamber of the hydraulic cylinder 1, and the outlet line 202 is connected to the rod chamber of the hydraulic cylinder 1, and the hydraulic pump 6 can drive the hydraulic rod to extend the support unit 3; when the other side of the regulating valve 5 is energized, the valve core of the regulating valve 5 moves to the lowered position, the inlet line 201 is connected to the rod chamber of the hydraulic cylinder 1, and the outlet line 202 is connected to the rodless chamber of the hydraulic cylinder 1, and the hydraulic pump 6 can drive the hydraulic rod to retract the support unit 3; when the regulating valve 5 loses power, the valve core of the regulating valve 5 moves to the locked position, and the inlet line 201 and the outlet line 202 are not connected to the hydraulic cylinder 1.

[0036] A throttle valve 8 is provided on the main liquid inlet path.

[0037] A control valve 9 is provided on the main liquid inlet path, and the control valve 9 includes a start position and a lock position; when the control valve 9 is energized, the valve core of the control valve 9 moves to the start position, and the main liquid inlet path is connected; when the control valve 9 loses power, the valve core of the control valve 9 moves to the lock position, and the main liquid inlet path is closed.

[0038] An overflow valve 10 is provided on the main liquid outlet path. The overflow valve 10 is in a normally closed state and opens only when the pressure reaches a certain level.

[0039] A reflux branch 203 is provided between the overflow valve 10 and the oil cylinder. When the valve core of the control valve 9 moves to the locking position, the hydraulic pump 6 is connected to the reflux branch 203 through the control valve 9. When the valve core of the control valve 9 moves to the starting position, the control valve 9 closes the reflux branch 203.

[0040] The seismometer support 4 is a cylindrical structure, and the adjustment plane and the assembly surface correspond to the two end surfaces of the seismometer support 4 in the axial direction respectively.

[0041] The three support units 3 are evenly distributed on the seismometer support 4 at an angle of 120 degrees along the circumference; a liquid leveling reference device 401 is provided on the leveling plane, and the liquid leveling reference device 401 includes a closed cavity, and the closed cavity is filled with a leveling indicating liquid, and the leveling indicating liquid forms a leveling bubble in the closed cavity for indicating the leveling state of the seismometer support 4.

[0042] The regulating valve 5 and the control valve 9 are all electric valves, and the three regulating valves 5 and one control valve 9 are all connected to the control device by signals.

[0043] When in use, the hydraulic pump 6 can be started first, and a control signal can be sent to the control valve 9 through the control device, so that the control valve 9 is energized, the valve core of the control valve 9 moves to the start position, and the main liquid inlet path is connected; a control signal can be sent to the specified regulating valve 5 through the control device, so that the specified side of the regulating valve 5 is energized, and the corresponding support unit 3 is controlled to extend or retract. Preferably, the locking position is set between the raising position and the lowering position. After each extension or retraction adjustment, the regulating valve 5 loses power so that the valve core moves to the locking position, and the current state of the support unit 3 is maintained, so that the user can observe the adjustment of the seismometer support 4 and then perform the next adjustment operation. In this way, the three regulating valves 5 are repeatedly adjusted, and finally the leveling bubble is located in the center of the closed cavity, completing the leveling of the seismometer support 4, and finally the seismometer pendulum, protective cover, etc. are installed on the seismometer support 4. This belongs to the prior art and will not be repeated here.

[0044] In addition, the support unit 3 on the seismometer support 4 can also be composed of two adjustable supports equipped with hydraulic cylinders 1 and one fixed support not equipped with hydraulic cylinders 1; of course, the number of support units 3 of the seismometer support 4 is not limited to three, and more support units 3 can be used to cooperate in support leveling.

[0045] The principles and implementation methods of the present invention are described in this article using specific embodiments. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0046] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A hydraulic adjustment support structure, characterized in that: The hydraulic cylinder comprises a hydraulic cylinder, a hydraulic drive unit, a support unit and a target adjustment device. The hydraulic cylinder is mounted on the target adjustment device. The support unit is mounted on and follows the hydraulic rod of the hydraulic cylinder. The hydraulic drive unit is connected to and acts on the hydraulic cylinder. The hydraulic drive unit can drive the support unit to extend or retract the target adjustment device by driving the hydraulic cylinder. The hydraulic drive unit comprises a liquid inlet, a liquid outlet, a regulating valve, a hydraulic pump and an oil tank. One end of the liquid inlet is connected to the hydraulic pump and the other end is connected to the regulating valve. One end of the liquid outlet is connected to the oil tank, The other end is connected to the regulating valve; the regulating valve includes a raising position, a locking position and a lowering position. When the valve core of the regulating valve moves to the raising position, the fluid inlet circuit is connected with the rodless chamber of the hydraulic cylinder, and the fluid outlet circuit is connected with the rod chamber of the hydraulic cylinder, and the hydraulic pump can drive the hydraulic rod to extend the supporting unit; when the valve core of the regulating valve moves to the lowering position, the fluid inlet circuit is connected with the rod chamber of the hydraulic cylinder, and the fluid outlet circuit is connected with the rodless chamber of the hydraulic cylinder, and the hydraulic pump can drive the hydraulic rod to retract the supporting unit; when the valve core of the regulating valve moves to the locking position, neither the fluid inlet circuit nor the fluid outlet circuit is connected with the hydraulic cylinder.

2. The hydraulic adjustment support structure according to claim 1, characterized in that: The number of the support units is several, the liquid inlet circuit of the hydraulic cylinder includes a main liquid inlet circuit and several liquid inlet branches, the liquid outlet circuit of the hydraulic cylinder includes a main liquid outlet circuit and several liquid outlet branches, the number of the hydraulic cylinders, regulating valves, liquid inlet branches and liquid outlet branches all correspond to the support units, and the liquid inlet branches and liquid outlet branches are connected to the corresponding hydraulic cylinders through corresponding regulating valves; one end of the liquid inlet main circuit is connected to the hydraulic pump, and the other end is connected in parallel to several liquid inlet branches; one end of the liquid outlet main circuit is connected to the oil tank, and the other end is connected in parallel to several liquid outlet branches.

3. The hydraulic adjustment support structure according to claim 2, characterized in that: A throttle valve is arranged on the main liquid inlet path.

4. The hydraulic adjustment support structure according to claim 3, characterized in that: A control valve is arranged on the main liquid inlet path, and the control valve includes a start position and a lock position; when the valve core of the control valve moves to the start position, the main liquid inlet path is connected; when the valve core of the control valve moves to the lock position, the main liquid inlet path is closed.

5. The hydraulic adjustment support structure according to claim 4, characterized in that: An overflow valve is arranged on the main liquid outlet path.

6. The hydraulic adjustment support structure according to claim 5, characterized in that: A reflux branch is provided between the overflow valve and the oil cylinder. When the valve core of the control valve moves to the locking position, the hydraulic pump is connected to the reflux branch through the control valve. When the valve core of the control valve moves to the starting position, the control valve closes the reflux branch.

7. An automatic leveling device for a seismometer, comprising a seismometer support, wherein the seismometer support comprises an adjustment plane and an assembly surface arranged opposite to each other, characterized in that: It also includes a hydraulic cylinder, a hydraulic drive unit and more than two supporting units, the hydraulic drive unit includes a liquid inlet, a liquid outlet, a regulating valve, a hydraulic pump and an oil tank, the liquid inlet includes a main liquid inlet and a plurality of liquid inlet branches, the liquid outlet includes a main liquid outlet and a plurality of liquid outlet branches, the number of the hydraulic cylinders, regulating valves, liquid inlet branches and liquid outlet branches corresponds to the number of supporting units, the liquid inlet branches and liquid outlet branches are connected to the corresponding hydraulic cylinders through corresponding regulating valves; one end of the main liquid inlet is connected to the hydraulic pump, and the other end is connected in parallel to a plurality of liquid inlet branches; one end of the main liquid outlet is connected to the oil tank, and the other end is connected in parallel to a plurality of liquid outlet branches; the hydraulic cylinder is assembled on the seismometer support, and the supporting unit A hydraulic rod assembled and followed by the hydraulic cylinder, the hydraulic drive unit is connected to and acts on the hydraulic cylinder, and the hydraulic drive unit can drive the supporting unit to extend or retract the assembly surface of the seismometer support by driving the hydraulic cylinder; the regulating valve includes a raising position, a locking position and a lowering position, when the valve core of the regulating valve moves to the raising position, the fluid inlet path is connected with the rodless chamber of the hydraulic cylinder, and the fluid outlet path is connected with the rod chamber of the hydraulic cylinder, and the hydraulic pump can drive the hydraulic rod to extend the supporting unit; when the valve core of the regulating valve moves to the lowering position, the fluid inlet path is connected with the rod chamber of the hydraulic cylinder, and the fluid outlet path is connected with the rodless chamber of the hydraulic cylinder, and the hydraulic pump can drive the hydraulic rod to retract the supporting unit; when the valve core of the regulating valve moves to the locking position, the fluid inlet path and the fluid outlet path are not connected with the hydraulic cylinder.

8. The automatic leveling device for a seismometer according to claim 7, characterized in that: The seismometer support is a cylindrical structure, and the adjustment plane and the assembly surface correspond to the two end surfaces of the seismometer support in the axial direction respectively; the number of the support units is three, and the three support units are evenly distributed on the seismometer support at an angle of 120 degrees along the circumference.

9. The automatic leveling device for a seismometer according to claim 8, characterized in that: A liquid leveling reference device is provided on the leveling plane, and the liquid leveling reference device comprises a closed cavity filled with a leveling indicating liquid, which forms a leveling bubble in the closed cavity for indicating the leveling state of the seismometer support.

10. The automatic leveling device for a seismometer according to any one of claims 7 to 9, characterized in that: The regulating valve is an electric valve, and each regulating valve is connected to the control device by signal.

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