Three-layer temperature control sealing cover for vertical pendulum body of seismometer

Abstract

The utility model discloses a three-layer temperature control sealing cover for a vertical pendulum body of a seismometer, and relates to a temperature protection device for the vertical pendulum body of the seismometer. The utility model aims to solve the problem that a vertical pendulum body of the existing seismometer is influenced by temperature, so that the measurement result is inaccurate. The three-layer temperature control shell is of a closed hollow cavity structure; the vertical pendulum body is placed on the base; the three-layer temperature control shell comprises an inner electric constant-temperature layer, a middle electric structural layer and an outer electric constant-temperature layer; the inner electric constant-temperature layer, the middle electric structural layer and the outer electric constant-temperature layer are arranged in a nested mode from inside to outside and electrically connected with the temperature control board. The temperature of the inner electric constant-temperature layer, the temperature of the middle electric structural layer and the temperature of the outer electric constant-temperature layer are controlled to be reduced in a stepped mode through the temperature control board. The beneficial effect is that the accuracy of the measurement result of the seismometer is improved.

Description

Technical Field

[0001] This utility model relates to a temperature protection device for the vertical pendulum of a seismometer. Background Technology

[0002] Currently, seismic measurement is a cutting-edge field of measurement that is crucial to people's property safety and national stability and development. Seismic measurement technology has a history of over a thousand years since Zhang Heng invented the seismograph. Seismic measurement methods have become increasingly sophisticated, and seismic theoretical models have become more complete. However, previous ultra-wideband seismometers had very demanding environmental requirements. The LP signal output was significantly affected by changes in ambient temperature, rendering the recorded signal less valuable. The BB signal output performed poorly at both low and high frequencies, exhibiting very high noise levels, failing to meet the true needs of seismic stations for ultra-wideband seismometers. Therefore, the vertical pendulum of existing seismometers suffers from significant temperature-dependent effects, leading to inaccurate measurement results. Utility Model Content

[0003] The purpose of this invention is to solve the problem that the vertical pendulum of the existing seismometer is affected by temperature, resulting in inaccurate measurement results. A three-layer temperature-controlled sealing cover for the vertical pendulum of the seismometer is proposed.

[0004] The present invention provides a three-layer temperature-controlled sealing cover for a vertical pendulum seismometer, comprising a three-layer temperature-controlled shell and a temperature-controlled plate.

[0005] The three-layer temperature control housing is a sealed hollow cavity structure and is used to house the vertical pendulum.

[0006] The three-layer temperature control housing includes an inner electric constant temperature layer, a middle electric structural layer, and an outer electric constant temperature layer.

[0007] The inner electric constant temperature layer, the middle electric structure layer, and the outer electric constant temperature layer are nested from the inside out, and the inner electric constant temperature layer, the middle electric structure layer, and the outer electric constant temperature layer are electrically connected to the temperature control board. The temperature control board controls the temperature of the inner electric constant temperature layer, the temperature of the middle electric structure layer, and the temperature of the outer electric constant temperature layer to decrease in a stepwise manner.

[0008] Furthermore, the external electric constant temperature layer includes a bottom heat insulation layer, an outer heat insulation layer, an outer heat insulation layer cover, an outer electric heating wire layer, and an outer constant temperature cylinder;

[0009] The outer insulation layer is a cylindrical structure with openings at both ends;

[0010] The outer insulation layer cover covers the top of the outer insulation layer;

[0011] The bottom insulation layer covers the bottom end of the outer insulation layer;

[0012] The outer heating wire layer and the outer constant temperature cylinder are attached to the outer insulation layer from the inside out. The outer heating wire layer is made of enameled wire and a thermistor is attached to the outer heating wire layer. The thermistor is electrically connected to the first bridge circuit of the temperature control board.

[0013] Furthermore, the medium-electric structure layer includes a medium-temperature constant-temperature chassis, a medium-electric heating wire layer, a gas duct, a double-layer felt, an aluminum film, and a single-layer felt.

[0014] The heating wire layer, double-layer felt, aluminum film and single-layer felt are arranged sequentially from the inside to the outside;

[0015] The air guide tube is disposed between the middle heating wire layer and the double-layer felt;

[0016] The heating element layer is made of enameled wire, and a second thermistor is attached to the heating element layer. The second thermistor is electrically connected to the second bridge circuit of the temperature control board.

[0017] The constant temperature chassis is set on the bottom insulation layer.

[0018] Furthermore, the internal thermostatic layer includes an internal thermostatic cover, an internal heating wire layer, and an internal thermostatic chassis;

[0019] The inner heating wire layer and the inner constant temperature cover are arranged in sequence from the inside to the outside, close to the middle heating wire layer;

[0020] The internal constant temperature chassis is mounted on the medium constant temperature chassis;

[0021] The inner heating wire layer is made of enameled wire, and a No. 3 thermistor is attached to the inner heating wire layer. The No. 3 thermistor is electrically connected to the No. 3 bridge circuit of the temperature control board.

[0022] Furthermore, it also includes the swing base and the swing base gasket;

[0023] The pendulum base is set on the inner constant temperature base, and the vertical pendulum body is set on the pendulum base through the vertical pendulum body washer;

[0024] The swing base gasket is placed between the swing base and the inner constant temperature base.

[0025] Furthermore, this also includes the chassis and pillars;

[0026] The three-layer temperature control housing is fixed to the chassis;

[0027] The bottom end of the support column is fixed to the chassis, and the top end of the support column passes through the bottom insulation layer and is supported on the bottom surface of the swing chassis.

[0028] It also includes a foot screw seat, a tightening nut, and a foot screw;

[0029] The foot screw seat is located on the side wall of the chassis;

[0030] The foot screw is mounted at the bottom of the foot screw seat by tightening the nut.

[0031] Furthermore, it also includes sealing gaskets;

[0032] The inner wall of the sealing gasket is in close contact with the side wall of the swing base, and the outer wall of the sealing gasket is in close contact with the inner wall of the three-layer temperature control housing.

[0033] Furthermore, it also includes a shielding layer;

[0034] The shielding layer is attached to the inner wall of the three-layer temperature control housing.

[0035] Furthermore, this also includes an outer cover;

[0036] The outer cover is placed over the outer surface of the three-layer temperature control housing.

[0037] Furthermore, it also includes a foot screw seat, a tightening nut, and a foot screw;

[0038] The foot screw seat is located on the side wall of the chassis;

[0039] The foot screw is mounted at the bottom of the foot screw seat by tightening the nut.

[0040] Compared with the prior art, the present invention has the following advantages:

[0041] The aforementioned three-layer temperature control shell is simple in design and low in cost. It comprises three heating and insulation structures: an inner electric constant-temperature layer, a middle electric structural layer, and an outer electric constant-temperature layer. Furthermore, the temperatures of the inner electric constant-temperature layer, the middle electric structural layer, and the outer electric constant-temperature layer are designed to gradually decrease in a stepped manner, resulting in good temperature stability and effectively solving the problem of the vertical pendulum of the ultra-wideband seismograph being greatly affected by temperature. The addition of the three-layer temperature control shell has a significant impact on the long-period noise of the ultra-wideband seismograph, improving the accuracy of the seismograph measurement results. Attached Figure Description

[0042] Figure 1 This is a schematic cross-sectional view of the overall structure of a three-layer temperature-controlled sealing cover for a vertical pendulum of a seismometer, as described in Specific Implementation Method 1.

[0043] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle.

[0044] Among them, 1 is the chassis; 2 is the bottom insulation layer; 3 is the middle constant temperature chassis; 4 is the inner constant temperature chassis; 5 is the sealing gasket; 6 is the outer insulation layer; 7 is the vertical swing body gasket; 8 is the shielding layer; 9 is the vertical swing body; 10 is the outer cover; 11 is the outer insulation layer cover; 12 is the middle electric structure layer; 13 is the outer electric heating wire layer; 14 is the outer constant temperature cylinder; 15 is the inner constant temperature cover; 16 is the swing chassis; 17 is the swing chassis gasket; 18 is the support column; 19 is the foot screw seat; 20 is the tightening nut; 21 is the foot screw; 22 is the temperature control plate; and 23 is the inner electric heating wire layer. Detailed Implementation

[0045] Specific Implementation Method 1: Combination Figures 1 to 2 This embodiment describes a three-layer temperature-controlled sealing cover for a vertical pendulum seismometer, comprising a three-layer temperature-controlled shell and a temperature-controlled plate 22.

[0046] The three-layer temperature control housing is a sealed hollow cavity structure and is used to house the vertical pendulum 9;

[0047] The three-layer temperature control housing includes an inner electric constant temperature layer, a middle electric structural layer 12, and an outer electric constant temperature layer;

[0048] The inner electric constant temperature layer, the middle electric structure layer 12, and the outer electric constant temperature layer are nested from the inside out, and the inner electric constant temperature layer, the middle electric structure layer 12, and the outer electric constant temperature layer are electrically connected to the temperature control board 22 respectively; the temperature control board 22 controls the temperature of the inner electric constant temperature layer, the temperature of the middle electric structure layer 12, and the temperature of the outer electric constant temperature layer to decrease in a stepwise manner.

[0049] In this embodiment, the inner electric constant temperature layer, the middle electric structural layer 12, and the outer electric constant temperature layer of the three-layer temperature control shell all have the functions of heat preservation and heating. The temperature control board 22 is provided with a first bridge circuit, a second bridge circuit, and a third bridge circuit; each bridge circuit is an independent power supply path; the first bridge circuit, the second bridge circuit, and the third bridge circuit are electrically connected to the inner electric constant temperature layer, the middle electric structural layer 12, and the outer electric constant temperature layer, respectively; and the temperature control board 22 monitors the temperature of the three-layer temperature control shell in real time, and controls the voltage values ​​sent to the inner electric constant temperature layer, the middle electric structural layer 12, and the outer electric constant temperature layer, thereby controlling the three-layer temperature control shell within a set range. The temperature of the three-layer temperature control shell is designed in a stepped manner, with the inner layer having the highest temperature and the outer layer having the lowest temperature, which is more conducive to temperature stability.

[0050] Specific Implementation Method 2: This implementation method further defines the three-layer temperature control sealing cover for the vertical pendulum of a seismometer described in Specific Implementation Method 1. In this implementation method, the external electric constant temperature layer includes a bottom heat insulation layer 2, an external heat insulation layer 6, an external heat insulation layer cover 11, an external electric heating wire layer 13, and an external constant temperature cylinder 14.

[0051] The outer heat insulation layer 6 is a cylindrical structure with openings at both ends;

[0052] The outer heat insulation layer cover 11 covers the top of the outer heat insulation layer 6;

[0053] The bottom insulation layer 2 covers the bottom end of the outer insulation layer 6;

[0054] The outer heating wire layer 13 and the outer constant temperature cylinder 14 are attached to the outer insulation layer 6 from the inside to the outside. The outer heating wire layer 13 is made of enameled wire and a thermistor is attached to the outer heating wire layer 13. The thermistor is electrically connected to the first bridge circuit of the temperature control board 22.

[0055] In this embodiment, the bottom insulation layer 2 is made of polystyrene, which has the effects of heat preservation, heat insulation and shock absorption; the outer insulation layer 6 is made of polystyrene, which has the effects of heat preservation, heat insulation and shock absorption; the outer insulation layer cover 11 is made of polystyrene, which has the effects of heat preservation, heat insulation and shock absorption; the bottom insulation layer 2, the outer insulation layer 6 and the outer insulation layer cover 11 can be an integral structure; the enameled wire of the outer heating wire layer 13 is made of pure copper; the outer constant temperature cylinder 14 is made of ZL101A type aluminum alloy; the outer constant temperature cylinder 14 is close to the outer heating wire layer 13, which is used to evenly distribute the heat generated by the outer heating wire layer 13 around the vertical pendulum 9.

[0056] Specific Implementation Method 3: This implementation method further defines the three-layer temperature-controlled sealing cover for a vertical pendulum seismometer described in Specific Implementation Method 2. In this implementation method, the medium electric structure layer 12 includes a medium constant temperature chassis 3, a medium electric heating wire layer 12-1, a gas duct 12-2, a double-layer felt 12-3, an aluminum film 12-4, and a single-layer felt 12-5.

[0057] The heating wire layer 12-1, double-layer felt 12-3, aluminum film 12-4 and single-layer felt 12-5 are arranged sequentially from the inside to the outside.

[0058] The air guide tube 12-2 is disposed between the middle electric heating wire layer 12-1 and the double-layer felt 12-3;

[0059] The heating wire layer 12-1 is made of enameled wire, and a second thermistor is attached to the heating wire layer 12-1. The second thermistor is electrically connected to the second bridge circuit of the temperature control board 22.

[0060] The constant temperature chassis 3 is mounted on the bottom insulation layer 2.

[0061] In this embodiment, the constant temperature chassis 3 is made of 7075 aluminum alloy; the enameled wire is made of pure copper; the single-layer felt 12-5 and the double-layer felt 12-3 are both used to maintain the temperature and prevent the temperature from falling too quickly; the air guide tube 12-2 is used to inject air into the sealed hollow cavity to prevent the vertical pendulum 9 from being in a vacuum environment, which would affect the measurement results.

[0062] Specific Implementation Method Four: This implementation method further defines the three-layer temperature-controlled sealing cover for a vertical pendulum seismometer described in Specific Implementation Method Three. In this implementation method, the inner electric constant temperature layer includes an inner constant temperature cover 15, an inner electric heating wire layer 23, and an inner constant temperature chassis 4.

[0063] The inner heating wire layer 23 and the inner constant temperature cover 15 are arranged in sequence from the inside to the outside, close to the middle heating wire layer 12-1;

[0064] The inner constant temperature chassis 4 is mounted on the middle constant temperature chassis 3;

[0065] The inner heating wire layer 23 is made of enameled wire, and a No. 3 thermistor is attached to the inner heating wire layer 23. The No. 3 thermistor is electrically connected to the No. 3 bridge circuit of the temperature control board 22.

[0066] In this embodiment, the enameled wire is made of pure copper; the inner thermostatic cover 15 is made of ZL101A type aluminum alloy, and the inner thermostatic chassis 4 is made of 7075 aluminum alloy; the inner thermostatic chassis 4 and the inner thermostatic cover 15 achieve uniform heat distribution from the inner heating wire layer 23. The inner heating wire layer 23, the middle heating wire layer 12-1, and the outer heating wire layer 13 are made of pure copper enameled wire of different diameters. Each heating wire layer is fitted with a precision thermistor for real-time monitoring of the layer's temperature. The thermistor is connected to different bridge circuits of the temperature control board 22 to form a closed loop, controlling the voltage value fed into the heating wire, thereby controlling the temperature of the inner heating wire layer 23, the middle heating wire layer 12-1, and the outer heating wire layer 13 to stabilize within the set range. The temperature of the inner heating wire layer 23, the middle heating wire layer 12-1, and the outer heating wire layer 13 is a stepped design, with the inner layer having the highest temperature and the outer layer having the lowest temperature, which is more conducive to temperature stability.

[0067] Specific Implementation Method 5: This implementation method further defines the three-layer temperature-controlled sealing cover for the vertical pendulum of a seismometer described in Specific Implementation Method 1. In this implementation method, it also includes a pendulum base plate 16 and a pendulum base plate gasket 17.

[0068] The swing base 16 is mounted on the inner constant temperature base 4, and the vertical swing body 9 is mounted on the swing base 16 through the vertical swing body washer 7.

[0069] The swing base gasket 17 is disposed between the swing base 16 and the inner constant temperature base 4.

[0070] In this embodiment, the vertical pendulum 9 is fixed by adding a pendulum base 16, so that the vertical pendulum 9 remains stable; and the vertical pendulum 9 and the pendulum base 16 are tightly fitted together by the pendulum base washer 17.

[0071] Specific Implementation Method Six: This implementation method further defines the three-layer temperature-controlled sealing cover for the vertical pendulum of a seismometer described in Specific Implementation Method One. In this implementation method, it also includes a chassis 1 and a support column 18.

[0072] The three-layer temperature control housing is fixed to the chassis 1;

[0073] The bottom end of the support column 18 is fixed to the chassis 1, and the top end of the support column 18 passes through the bottom heat insulation layer 2 and is supported on the bottom surface of the swing chassis 16.

[0074] In this embodiment, the chassis 1 is used to support the three-layer temperature control shell, the temperature control plate 22 and the vertical swing body 9; the support column 18 is made of stainless steel; the support column 18 supports the swing chassis 16, so that the vertical swing body 9 remains stable.

[0075] Specific Implementation Method Seven: This implementation method further defines the three-layer temperature control sealing cover for the vertical pendulum body of the seismometer described in Specific Implementation Method Six. In this implementation method, it also includes a foot screw seat 19, a tightening nut 20, and a foot screw 21.

[0076] The foot screw seat 19 is mounted on the side wall of the chassis 1;

[0077] The foot screw 21 is mounted at the bottom end of the foot screw seat 19 via a tightening nut 20.

[0078] In this embodiment, the foot screw seat 19, the tightening nut 20, and the foot screw 21 are combined to provide support and adjustment. By adjusting the tightening nut 20, the relative distance between the foot screw 21 and the foot screw seat 19 is changed, so that the chassis 1 is in a horizontal state, thereby ensuring that the vertical pendulum 9 is in a vertical state. The foot screw seat 19 is made of H62 brass, which has good mechanical properties, good plasticity in the hot state, and good plasticity in the cold state. At the same time, H62 brass has good machinability, is easy to braze and weld, and is corrosion resistant. The tightening nut 20 and the foot screw 21 are both made of stainless steel.

[0079] Specific Implementation Method 8: This implementation method further defines the three-layer temperature control sealing cover for the vertical pendulum body of the seismometer described in Specific Implementation Method 4. In this implementation method, a sealing gasket 5 is also included.

[0080] The inner wall of the sealing gasket 5 is in close contact with the side wall of the swing base plate 16, and the outer wall of the sealing gasket 5 is in close contact with the inner wall of the three-layer temperature control housing.

[0081] In this embodiment, the sealing gasket 5 is used to increase the airtightness between the swing base plate 16 and the three-layer temperature control housing.

[0082] Specific Implementation Method Nine: This implementation method further defines the three-layer temperature-controlled sealing cover for the vertical pendulum of a seismometer described in Specific Implementation Method One. In this implementation method, a shielding layer 8 is also included.

[0083] The shielding layer 8 is attached to the inner wall of the three-layer temperature control housing.

[0084] In this embodiment, the shielding layer 8 is made of permalloy, which has a high magnetic permeability, thereby preventing the current from affecting the vertical pendulum 9 during the heating process of the three-layer temperature control shell; and further improving the accuracy of the seismometer measurement results.

[0085] Specific Implementation Method 10: This implementation method further defines the three-layer temperature-controlled sealing cover for the vertical pendulum body of a seismometer described in Specific Implementation Method 1. In this implementation method, an outer cover 10 is also included.

[0086] The outer cover 10 covers the outer surface of the three-layer temperature control housing.

[0087] In this embodiment, the outer cover 10 is made of stainless steel, which provides protection against damage to the three-layer temperature control housing.

[0088] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer, characterized in that, It includes a three-layer temperature control housing and a temperature control plate (22); The three-layer temperature control housing is a sealed hollow cavity structure and is used to place a vertical pendulum (9); The three-layer temperature control housing includes an inner electric constant temperature layer, a middle electric structure layer (12), and an outer electric constant temperature layer; The inner electric constant temperature layer, the middle electric structure layer (12) and the outer electric constant temperature layer are nested from the inside to the outside, and the inner electric constant temperature layer, the middle electric structure layer (12) and the outer electric constant temperature layer are electrically connected to the temperature control board (22); the temperature control board (22) controls the temperature of the inner electric constant temperature layer, the temperature of the middle electric structure layer (12) and the temperature of the outer electric constant temperature layer to decrease in a stepwise manner.

2. The three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer according to claim 1, characterized in that, The external electric constant temperature layer includes a bottom heat insulation layer (2), an external heat insulation layer (6), an external heat insulation layer cover (11), an external electric heating wire layer (13), and an external constant temperature cylinder (14); The outer heat insulation layer (6) is a cylindrical structure with openings at both ends; The outer heat insulation layer cover (11) covers the top of the outer heat insulation layer (6); The bottom insulation layer (2) covers the bottom end of the outer insulation layer (6); The outer heating wire layer (13) and the outer constant temperature cylinder (14) are attached to the outer heat insulation layer (6) from the inside to the outside. The outer heating wire layer (13) is made of enameled wire and a thermistor is attached to the outer heating wire layer (13). The thermistor is electrically connected to the first bridge circuit of the temperature control board (22).

3. The three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer according to claim 2, characterized in that, The medium electric structure layer (12) includes a medium constant temperature chassis (3), a medium electric heating wire layer (12-1), a gas duct (12-2), a double-layer felt (12-3), an aluminum film (12-4), and a single-layer felt (12-5); The heating wire layer (12-1), double-layer felt (12-3), aluminum film (12-4), and single-layer felt (12-5) are arranged sequentially from the inside to the outside; The air guide tube (12-2) is disposed between the middle heating wire layer (12-1) and the double-layer felt (12-3); The heating wire layer (12-1) is made of enameled wire, and a second thermistor is attached to the heating wire layer (12-1). The second thermistor is electrically connected to the second bridge circuit of the temperature control board (22). The constant temperature chassis (3) is set on the bottom insulation layer (2).

4. The three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer according to claim 3, characterized in that, The inner thermostatic layer includes an inner thermostatic cover (15), an inner heating wire layer (23), and an inner thermostatic chassis (4); The inner heating wire layer (23) and the inner constant temperature cover (15) are arranged from the inside to the outside, close to the middle heating wire layer (12-1); The inner constant temperature chassis (4) is mounted on the middle constant temperature chassis (3); The inner heating wire layer (23) is made of enameled wire and a No. 3 thermistor is attached to the inner heating wire layer (23). The No. 3 thermistor is electrically connected to the No. 3 bridge circuit of the temperature control board (22).

5. A three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer according to claim 4, characterized in that, It also includes a swing base (16) and a swing base washer (17); The swing base (16) is set on the inner constant temperature base (4), and the vertical swing body (9) is set on the swing base (16) through the vertical swing body washer (7); The swing base gasket (17) is placed between the swing base (16) and the inner constant temperature base (4).

6. A three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer according to claim 5, characterized in that, It also includes the chassis (1) and the support pillars (18); The three-layer temperature control housing is fixed on the chassis (1); The bottom end of the support column (18) is fixed to the chassis (1), and the top end of the support column (18) passes through the bottom insulation layer (2) and is supported on the bottom surface of the swing chassis (16).

7. A three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer according to claim 6, characterized in that, It also includes a foot screw seat (19), a tightening nut (20), and a foot screw (21); The foot screw seat (19) is set on the side wall of the chassis (1); The foot screw (21) is mounted at the bottom end of the foot screw seat (19) by means of a tightening nut (20).

8. A three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer according to claim 4, characterized in that, It also includes a sealing gasket (5); The inner wall of the sealing gasket (5) is in close contact with the side wall of the swing base (16), and the outer wall of the sealing gasket (5) is in close contact with the inner wall of the three-layer temperature control housing.

9. A three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer according to claim 1, characterized in that, It also includes a shielding layer (8); The shielding layer (8) is attached to the inner wall of the three-layer temperature control housing.

10. A three-layer temperature-controlled sealing cover for a vertical pendulum body of a seismometer according to claim 1, characterized in that, It also includes an outer cover (10); The outer cover (10) covers the outer surface of the three-layer temperature control housing.

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