阅读说明：本技术 一种可变震源发生器 (Variable vibration source generator ) 是由 孙冬 凌云龙 江德 凌鹍 张腾 毛敏 陈长勇 于 2021-07-16 设计创作，主要内容包括：本发明公开了一种可变震源发生器,所述发生器包括移动车体,所述移动车体的前端安装有承重架,所述承重架顶部安装有升降液压缸,所述升降液压缸的输出端朝下且输出端上连接有电磁铁板,所述承重架上还竖向设有滑轨,所述滑轨内活动设有重锤,所述重锤的顶面连接有磁吸板；所述发生器还包括控制器,所述控制器的信号输出端与升降液压缸和电磁铁板的控制端连接。该震源发生器实现了落锤的自动化控制,无需人工手动操作,省时省力,安全性能高,且可有效避免重锤撞击后的回弹现象,从而避免回弹产生的冲击波对岩层情况分析造成干扰；该发生器的重锤内可根据需要填入不同配重物质,实现对不同地质的勘探。(The invention discloses a variable shock source generator which comprises a movable vehicle body, wherein a bearing frame is installed at the front end of the movable vehicle body, a lifting hydraulic cylinder is installed at the top of the bearing frame, the output end of the lifting hydraulic cylinder faces downwards, an electromagnet plate is connected to the output end of the lifting hydraulic cylinder, a sliding rail is also vertically arranged on the bearing frame, a heavy hammer is movably arranged in the sliding rail, and the top surface of the heavy hammer is connected with a magnetic suction plate; the generator further comprises a controller, and the signal output end of the controller is connected with the control ends of the lifting hydraulic cylinder and the electromagnet plate. The shock source generator realizes automatic control of the drop hammer, does not need manual operation, saves time and labor, has high safety performance, and can effectively avoid the rebound phenomenon after the impact of the heavy hammer, thereby avoiding the interference of shock waves generated by rebound on the analysis of the rock stratum; different counterweight substances can be filled in the heavy hammer of the generator according to requirements, and exploration on different geologies is realized.)

1. A variable source generator, the generator comprising a mobile bodywork (1), characterized in that: a bearing frame (2) is installed at the front end of the movable vehicle body (1), a lifting hydraulic cylinder (3) is installed at the top of the bearing frame (2), the output end of the lifting hydraulic cylinder (3) faces downwards, an electromagnet plate (4) is connected to the output end of the lifting hydraulic cylinder, a sliding rail (5) is further vertically arranged on the bearing frame (2), a heavy hammer (6) is movably arranged in the sliding rail (5), and the top surface of the heavy hammer (6) is connected with a magnetic suction plate (7);

the generator further comprises a controller (8), and a signal output end of the controller (8) is connected with control ends of the lifting hydraulic cylinder (3) and the electromagnet plate (4).

2. The variable seismic source generator of claim 1, wherein: the weight (6) adopts a hollow structure, a main cavity (601) is formed in the center of the interior of the weight (6), counterweight substances are injected into the main cavity (601), a plurality of auxiliary cavities (602) are formed in the periphery of the interior of the weight (6), an elastic membrane (603) is transversely arranged in the auxiliary cavities (602), the auxiliary cavities (602) are divided into an upper space and a lower space by the elastic membrane (603), a repressing substance is injected into the upper space, a check valve (604) for limiting gas to enter the upper space from the outside is arranged at the top of the upper space, and the lower space is communicated with the outside.

3. A variable seismic source generator according to claim 2, wherein: check valve (604) include casing (6041), spring (6042), valve plate (6043) and valve post (6044), casing (6041) inside is formed with valve pocket (6045), has seted up a plurality of through-hole (6046) on casing (6041), through-hole (6046) communicate with vice cavity (602) upper portion space through valve pocket (6045), the sealed position of all through-holes (6046) is located in valve plate (6043) and carries out the bottom sprag through spring (6042), valve post (6044) are connected and are passed casing (6041) and outwards stretch out at valve plate (6043) top surface and valve post (6044) activity.

4. A variable seismic source generator according to claim 2, wherein: the raw materials for preparing the elastic membrane (603) comprise 40-60 parts of centrifugal concentrated natural latex, 20-25 parts of synthetic isoprene latex, 0.5-1 part of potassium hydroxide, 0.2-0.8 part of zinc oxide and 0.5-0.8 part of surfactant.

5. A variable seismic source generator according to claim 2, wherein: an injection port is formed in the top of the main cavity (601), and a sealing plug (605) is arranged in the injection port.

6. A variable seismic source generator according to claim 2, wherein: the counterweight substance is liquid or solid, and the repressing substance is liquid.

7. The variable seismic source generator of claim 1, wherein: the two groups of hydraulic lifting cylinders (3) are fixedly connected with the bearing frame (2) through mounting frames (10).

Technical Field

The invention relates to the technical field of seismic exploration equipment, in particular to a variable seismic source generator.

Background

Seismic exploration is always an extremely important geophysical method for shallow geological exploration of urban construction, ground disasters, engineering, environment, resources and the like. The seismic exploration method is a geophysical exploration method which applies impact force to the ground through artificial earthquake, generates seismic waves after the ground is impacted, receives reflected waves transmitted back from the ground through a detector and analyzes reflected wave information to find out the underground geological structure. The artificial seismic source is equipment used for exciting seismic waves in seismic exploration and is a source for generating seismic signals, the strength of the seismic waves is determined by the impact force of the seismic source on a stratum, and the signal quality excited by the seismic source directly influences the seismic exploration effect.

At present, the more manual seismic source generating equipment is a drop hammer type seismic source vehicle, and seismic waves are formed by impacting the ground through free falling bodies of a heavy hammer. However, the existing drop hammer type seismic source vehicle has the following defects: (1) the rebound phenomenon is easy to occur after the heavy hammer impacts the ground, and the impact generated by the rebound can cause serious interference on the analysis process of the seismic wave signals; (2) controllability and variability are poor; (3) the operation is inconvenient.

Disclosure of Invention

The invention aims to provide a variable shock source generator, which solves the defects of easy rebound of impact, poor controllability and variability and inconvenient operation of the existing shock source generator.

The invention realizes the purpose through the following technical scheme:

a variable shock source generator comprises a moving vehicle body, wherein a bearing frame is mounted at the front end of the moving vehicle body, a lifting hydraulic cylinder is mounted at the top of the bearing frame, the output end of the lifting hydraulic cylinder faces downwards, an electromagnet plate is connected to the output end of the lifting hydraulic cylinder, a sliding rail is further vertically arranged on the bearing frame, a heavy hammer is movably arranged in the sliding rail, and the top surface of the heavy hammer is connected with a magnetic suction plate;

the generator further comprises a controller, and the signal output end of the controller is connected with the control ends of the lifting hydraulic cylinder and the electromagnet plate.

The improved structure of the counter weight is characterized in that the counter weight is of a hollow structure, a main cavity is formed in the center of the interior of the counter weight, counterweight substances are injected into the main cavity, a plurality of auxiliary cavities are formed in the periphery of the interior of the counter weight, an elastic membrane is transversely arranged in each auxiliary cavity, each auxiliary cavity is divided into an upper space and a lower space by the elastic membrane, recompression substances are injected into the upper spaces, one-way valves used for limiting gas to enter the upper spaces only from the outside are arranged at the top of the upper spaces, and the lower spaces are communicated with the outside.

The check valve comprises a shell, a spring, a valve plate and a valve post, wherein a valve cavity is formed inside the shell, a plurality of through holes are formed in the shell, the through holes are communicated with the upper space of the auxiliary cavity through the valve cavity, the valve plate is arranged at the sealing positions of all the through holes and is supported at the bottom through the spring, and the valve post is connected to the top surface of the valve plate and movably penetrates through the shell to extend outwards.

The further improvement is that the raw materials for preparing the elastic membrane comprise 40-60 parts of centrifugal concentrated natural latex, 20-25 parts of synthetic isoprene latex, 0.5-1 part of potassium hydroxide, 0.2-0.8 part of zinc oxide and 0.5-0.8 part of surfactant.

The further improvement is that the top of the main cavity is provided with an injection hole, and a sealing plug is arranged in the injection hole.

In a further improvement, the counterweight substance is liquid or solid, and the repressing substance is liquid.

The improved structure is characterized in that the two groups of lifting hydraulic cylinders are fixedly connected with the bearing frame through mounting frames.

The invention has the beneficial effects that: the shock source generator realizes automatic control of the drop hammer, does not need manual operation, saves time and labor, has high safety performance, and can effectively avoid the rebound phenomenon after the impact of the heavy hammer, thereby avoiding the interference of shock waves generated by rebound on the analysis of the rock stratum; different counterweight substances can be filled in the heavy hammer of the generator according to requirements, and exploration on different geologies is realized.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the weight;

FIG. 3 is a schematic cross-sectional view of a check valve;

FIG. 4 is a graph showing the results of a field experiment of the development of the wave group when the present invention is used;

FIG. 5 is a graph of typical raw record results of field observations as used in the present invention;

in the figure: 1. moving the vehicle body; 2. a bearing frame; 3. a lifting hydraulic cylinder; 4. an electromagnet plate; 5. a slide rail; 6. a weight; 601. a main chamber; 602. a secondary cavity; 603. an elastic film; 604. a one-way valve; 6041. a housing; 6042. a spring; 6043. a valve plate; 6044. a spool; 6045. a valve cavity; 6046. a through hole; 605. a sealing plug; 7. a magnetic attraction plate; 8. a controller; 9. adjusting a hydraulic cylinder; 10. a mounting frame; 11. a protective frame.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Referring to fig. 1 to 3, a variable shock source generator comprises a moving vehicle body 1, wherein the moving vehicle body 1 can be an electric vehicle or a fuel vehicle, a bearing frame 2 is mounted at the front end of the moving vehicle body 1, a lifting hydraulic cylinder 3 is mounted at the top of the bearing frame 2, the output end of the lifting hydraulic cylinder 3 faces downwards, an electromagnet plate 4 is connected to the output end, a sliding rail 5 is further vertically arranged on the bearing frame 2, a heavy hammer 6 is movably arranged in the sliding rail 5, and the top surface of the heavy hammer 6 is connected with a magnetic absorption plate 7; the generator further comprises a controller 8, the controller 8 can be arranged in a cab and is convenient to operate and control in a unified mode, and a signal output end of the controller 8 is connected with control ends of the lifting hydraulic cylinder 3 and the electromagnet plate 4.

When geological exploration is needed, the movable vehicle body 1 is firstly opened to a specified position, then the controller 8 controls the electromagnet plate 4 to be electrified to generate magnetic force, then the lifting hydraulic cylinder 3 is controlled to move downwards to adsorb the magnetic attraction plate 7 and the heavy hammer 6, then the lifting hydraulic cylinder 3 is controlled to ascend to a specified height, for example, the position of 1.5m, the electromagnet plate 4 is controlled to be powered off, the heavy hammer 6 can fall freely at the moment to impact the ground to generate shock waves, reflected waves of underground rock strata are received through corresponding analysis equipment, and exploration on the rock stratum condition can be achieved.

In the invention, the bearing frame 2 and the movable vehicle body 1 are rotatably arranged, and the movable vehicle body 1 is provided with a hydraulic adjusting cylinder 9 for adjusting the angle of the bearing frame 2. When meeting ground slope, it is not practical to excavate in a large scale smoothly, if bearing frame 2 remains to be fixed with removal automobile body 1 all the time, then slide rail 5 on bearing frame 2 also has certain inclination, is unfavorable for the free fall of weight 6 like this. Therefore, the bearing frame 2 and the movable vehicle body 1 can be rotatably installed, and the angle of the bearing frame 2 is adjusted through the adjusting hydraulic cylinder 9, so that the bearing frame 2 and the sliding rail 5 can be always ensured to be in a vertical state, and the heavy hammer 6 can be ensured to move in a free falling body mode.

According to the invention, a weight 6 is of a hollow structure, a main cavity 601 is formed in the center of the interior of the weight 6, a counterweight substance is injected into the main cavity 601 and used for increasing the weight of the weight 6 and improving the impact strength, a plurality of auxiliary cavities 602 are formed in the periphery of the interior of the weight 6, an elastic membrane 603 is transversely arranged in each auxiliary cavity 602, each auxiliary cavity 602 is divided into an upper independent space and a lower independent space by the elastic membrane 603, a repressing substance is injected into the upper space, a one-way valve 604 used for limiting gas to enter the upper space from the outside is arranged at the top of the upper space, and the lower space is communicated with the outside.

At the moment when the weight 6 impacts the ground, the mass pressed again in the upper cavity of the auxiliary cavity 602 will press the elastic membrane 603 to deform downward under the inertia effect, and the mass pressed again will exert a downward acting force on the whole weight 6 during the deformation process, and the acting force will be maintained for a certain time, which, although being short, will press the weight 6, so that the weight 6 will not rebound due to the impact within the time, and the secondary or multiple impact phenomena will not occur. Moreover, when the pressure restoring material is pressed down, air is supplemented into the upper space of the auxiliary cavity 602 through the check valve 604, the air pressure in the upper space is kept constant, and when the elastic membrane 603 reaches the maximum deformation amount and begins to have a rebound tendency, the check valve 604 is automatically closed, so that the air in the upper space cannot be discharged, and at the moment, the elastic membrane 603 cannot rebound basically (only the minimum amount of air pressure recovery can be overcome through the self elasticity of the elastic membrane 603), therefore, after the pressure restoring material is pressed down, the pressure restoring material cannot rebound and shake basically, so that unnecessary vibration force cannot be generated on the heavy hammer 6, and the exploration reliability is further improved.

In the invention, the check valve 604 comprises a housing 6041, a spring 6042, a valve plate 6043 and a valve column 6044, wherein a valve cavity 6045 is formed inside the housing 6041, a plurality of through holes 6046 are formed in the housing 6041, the through holes 6046 are communicated with the upper space of the auxiliary cavity 602 through the valve cavity 6045, the valve plate 6043 is arranged at the sealing position of all the through holes 6046 and is supported at the bottom through the spring 6042, the valve column 6044 is connected to the top surface of the valve plate 6043, and the valve column 6044 movably penetrates through the housing 6041 to extend outwards.

When the check valve 604 presses down the re-pressing substance, the pressure of the upper space of the auxiliary cavity 602 becomes small, and under the action of the external atmospheric pressure, the valve plate 6043 can move downwards against the elastic supporting force of the spring 6042 (the elasticity of the spring 6042 is small), so that the through hole 6046 is opened, and the external air enters; when the repressurization substance stops pressing down, the valve plate 6043 will return to the original position supported by the spring 6042, closing all the through holes 6046 and remaining in the closed state when the subsequent elastic membrane 603 and the repressurization substance have a tendency to rebound. In addition, the check valve 604 has an advantage that the valve plate 6043 can be manually or electrically controlled to open by the spool 6044, so that the upper space of the sub-chamber 602 is restored to the normal atmospheric pressure, and the elastic membrane 603 is restored to the original state.

In the invention, the raw materials for preparing the elastic membrane 603 comprise 40-60 parts of centrifugal concentrated natural latex, 20-25 parts of synthetic isoprene latex, 0.5-1 part of potassium hydroxide, 0.2-0.8 part of zinc oxide and 0.5-0.8 part of surfactant. Preferably, the elastic membrane 603 is prepared from raw materials including 50 parts of centrifugal concentrated natural latex, 22 parts of synthetic isoprene latex, 0.8 part of potassium hydroxide, 0.5 part of zinc oxide and 0.7 part of surfactant by a conventional membrane forming process. The elastic membrane 603 prepared by the formula has stable elasticity, can perform a stable deformation process when a re-pressing substance is pressed down, cannot generate large deformation instantly, and has large deformation amount finally.

In the present invention, the top of the main cavity 601 is opened with an injection port, and a sealing plug 605 is provided in the injection port for injecting or discharging the counterweight substance.

In the invention, the counterweight substance is liquid or solid, different substances can be injected according to the needs to achieve different counterweight effects, preferably, water, fine sand and the like can be adopted, and the injection and the extraction are very convenient. In addition, the repressing substance is liquid, such as water, or liquid with certain viscosity, so that the fluidity is ensured, and large shaking cannot occur.

In the invention, two groups of lifting hydraulic cylinders 3 are provided, the two groups of lifting hydraulic cylinders 3 are fixedly connected with the bearing frame 2 through the mounting frame 10, the mounting frame 10 needs to have better bearing capacity, and a plurality of lifting hydraulic cylinders 3 can be combined to support together.

According to the invention, a protective frame 11 is arranged on one side surface of the bearing frame 2 for arranging the heavy hammer 6, the protective frame 11 is generally made of steel, the strength is ensured, and the protective frame is arranged at the outer ring position of a falling path of the heavy hammer 6 and is used for ensuring safety and avoiding accidental injury to people when the heavy hammer 6 falls. Moreover, when the generator is not used or the vehicle body 1 needs to be moved, the heavy hammer 6 can be supported and lifted by inserting the base plate into the protective frame 11, so that the electromagnet plate 4 does not need to be electrified all the time, and the electric energy is saved.

The method is carried out according to the requirements of shallow seismic exploration technical specification DZ/T0170-1997 of geological mineral department during the artificial seismic exploration. Instruments to be used in conjunction include seismometers (e.g., DZQ24-2A high resolution seismometers manufactured by Chongqing geological instruments), geophones (e.g., CDJ-Z38 geophones manufactured by Chongqing geological instruments).

Taking the shallow artificial seismic exploration in the spreading economic development area (universe) in 2021 in 5 and 6 months as an example, the seismic source generator of the invention is verified in effect:

according to the requirements of shallow seismic survey technical specification DZ/T0170-1997, test work is firstly carried out after the device enters a construction site, and the test work comprises instrument consistency test, selection of the self-vibration frequency of the detector, selection of sampling rate and recording length and the like.

The acquisition unit and the 24 detectors participate in a consistency test under the following test conditions: and (3) exciting the detectors with 24 channels at a channel interval of 4 meters and a shot point interval of 8 meters at an offset distance of 16m by hammering, wherein the working parameters of the detector are sampling point interval of 500ms and sampling point length of 2048. All 24 records have time difference less than or equal to 1ms (namely the error is within two sampling points), and the requirement of the specification is met.

As shown in fig. 4, it can be seen from the figure that the surface wave, the direct wave, the first-arrival refracted wave, and the reflected wave all develop and are clearly distinguished. As shown in fig. 5, a typical original recording result of field observation is shown, and it can be seen from the figure that the recording effect is better, the signal has a higher signal-to-noise ratio, and the surface wave, the direct wave, the first-arrival refracted wave, and the reflected wave can be clearly distinguished.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.