A borehole static cone penetration apparatus

Abstract

The present application relates to a kind of borehole type static sounding device, it includes hydraulic power device, photoelectric separation cabin, suspension device, valve cabin, collection battery cabin, penetration propulsion device and probe in turn from top to bottom connection;Wherein, hydraulic power device is connected with external electricity by bearing cable interface, photoelectric separation cabin is connected with suspension device by axial positioning elastic card mechanism, suspension device is set in the middle position of borehole type static sounding device, hydraulic power device and collection battery cabin, penetration propulsion device are set to be located in the two sides of suspension device.The borehole type static sounding device of the present application can improve its stability when measuring, improve measurement accuracy.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering exploration, specifically relating to a drilling-type static cone penetration test device with a hydraulic power source integrated downhole. Background Technology

[0002] Before constructing relevant marine engineering facilities, it is necessary to conduct preliminary investigations into the basic physical and mechanical properties of the seabed soil and the bearing capacity of the foundation. Static cone penetration testing (DCPT) is an effective means of obtaining these properties of the seabed soil. With the continuous development of marine resource development and utilization and marine engineering construction, DCPT of seabed soil is being used more and more widely in the fields of marine geological surveys and marine engineering exploration.

[0003] Static cone penetration testing (DCPT) involves inserting a probe into the seabed soil at a quasi-static, uniform velocity using a penetration testing device to obtain relevant soil parameters. Currently, the main type of seabed static cone penetration testing is the seabed-type DCPT, which has a relatively simple equipment system and is easy to operate. In this type, the penetration testing device sits on the seabed surface, and a probe rod with a probe at the front end is inserted into the seabed soil from the seabed surface using the penetration testing device.

[0004] In existing technologies, the hydraulic power unit of shallow-water borehole-type static cone penetration testing (PCP) systems is mounted on the drilling platform of the carrier vessel. Hydraulic oil is transported via high-pressure rubber hoses along the drill pipe to the cone assembly to drive the various hydraulic actuators. However, in deep-water conditions, when the umbilical cable is long, the high-pressure oil's dynamic hysteresis characteristics and the elastic deformation of the rubber hoses during long-distance pipeline transmission can adversely affect the accuracy of propulsion speed control, and may even fail to meet the accuracy requirements. Existing hydraulic power units in shallow-water borehole-type PCP systems cannot achieve smooth, uniform penetration, significantly impacting the PCP test results. Because the steel pipe in the underwater borehole is easily affected by underwater dynamics such as currents, it is prone to flexible displacement, which is difficult to avoid. This displacement significantly affects the penetration of the PCP device, hindering accurate measurements and negatively impacting precision measurement results. Summary of the Invention

[0005] In order to solve all or some of the above problems, the present invention aims to provide a drilling-type static cone penetration test device to improve its stability and measurement accuracy during measurement.

[0006] This application provides a drilling-type static cone penetration test device, including a hydraulic power unit, a photoelectric separation chamber, a suspension device, a valve chamber, a data acquisition battery chamber, a penetration propulsion device, and a probe connected sequentially from top to bottom; wherein, the hydraulic power unit is connected to an external power source through a load-bearing cable interface, the photoelectric separation chamber is connected to the suspension device through an axial positioning spring clip mechanism, the suspension device is located in the middle of the drilling-type static cone penetration test device, and the hydraulic power unit, the data acquisition battery chamber, and the penetration propulsion device are located on both sides of the suspension device.

[0007] In some embodiments, the hydraulic power unit includes an electric motor, an oil pump, and an oil tank, wherein the oil tank has a function of compensating for the hydraulic oil level with seawater.

[0008] In some embodiments, the hydraulic power unit further includes: a 4-core connector, an oil pump transition block, a junction box, an oil pump connecting seat, and an oil tank transition connector, wherein the oil pump and the junction box are fixed in the oil pump connecting seat by the oil pump transition block, and the motor, the oil pump connecting seat, and the oil tank transition connector are axially connected in sequence, and the 4-core connector is located at the output end of the motor.

[0009] In some embodiments, the outer wall of the oil pump connector at the location where the oil pump and the junction box are placed is formed with a radial through groove.

[0010] In some embodiments, the oil tank includes an oil tank end cover, an oil tank outer cylinder, and an oil tank rear end cover connected axially in sequence. The oil tank rear end cover is connected to the oil tank transition joint through an oil pump connecting sleeve. The oil tank also includes a filter, an oil tank piston rod, and an oil tank compensation piston. The oil tank piston rod and the oil tank compensation piston are disposed inside the oil tank outer cylinder and are sealed at both ends to the oil tank end cover and the oil tank rear end cover. The oil tank compensation piston is sealed and sleeved on the inner wall of the oil tank piston rod and the oil tank outer cylinder. The filter is disposed inside the oil tank end cover and its two ends communicate with the inside of the oil tank outer cylinder and the outside of the oil tank rear end cover.

[0011] In some embodiments, the hydraulic power unit further includes an oil pump connecting sleeve for connecting the oil tank transition joint and the oil tank rear end cover. The oil pump connecting sleeve includes a first sleeve body, a first end of the first sleeve body is threadedly connected to the oil tank transition joint, and a second end of the first sleeve body is sleeved and fixed to the oil tank rear end cover by a plurality of screws. An observation through groove is formed on the outer peripheral wall of the first sleeve body, and a radial through hole is formed on the outer peripheral wall of the second end of the first sleeve body for the plurality of screws to pass through. A plurality of threaded connection holes are formed at the position of the connecting screws on the oil tank rear end cover.

[0012] In some embodiments, the hydraulic power unit further includes a tank-photovoltaic compartment connecting sleeve for connecting the tank end cap and the photovoltaic separation compartment. The tank-photovoltaic compartment connecting sleeve includes a second sleeve body. The first end of the second sleeve body is sleeved and fixed to the tank end cap by a plurality of screws. The second end of the second sleeve body is threadedly connected to the end of the photovoltaic separation compartment. The outer peripheral wall of the first end of the second sleeve body is formed with a radial through hole for the plurality of screws to pass through. The position of the connecting screw on the tank end cap is formed with a plurality of threaded connecting holes.

[0013] In some embodiments, the oil pipes within the hydraulic power unit that connect the oil pump, oil tank, and actuator are made of metal.

[0014] In some embodiments, the suspension device includes an axial positioning spring clip mechanism, which includes a spring clip seat, a positioner end cap, and a positioner connecting seat connected axially in sequence. The positioner connecting seat is provided with a shear ring, the end of the spring clip seat is connected to the valve chamber, and the positioner connecting seat is connected to the photoelectric separation chamber.

[0015] In some embodiments, the suspension device further includes a locator connecting cylinder, which includes a third sleeve body. The first end of the third sleeve body is sleeved and fixed to the locator connecting cylinder by a plurality of screws. The second end of the third sleeve body is threadedly connected to the photoelectric separation chamber. An observation through groove is formed on the outer peripheral wall of the third sleeve body. A radial through hole for a plurality of screws to pass through is formed on the outer peripheral wall of the first end of the third sleeve body. A plurality of threaded connection holes are formed at the position of the locator connecting seat for connecting screws.

[0016] As can be seen from the above technical solution, the drilling-type static cone penetration test device provided by the present invention has the following advantages:

[0017] 1) The suspension device is located at the geometric center and center of gravity of the drilling static cone penetrometer, which makes the drilling static cone penetrometer of the present invention more stable and uniform during penetration, thereby achieving better precision measurement.

[0018] 2) The hydraulic power unit is integrated into the downhole static cone penetration test device. The deck system and the static cone penetration test device only need to be connected by a single carrying cable to realize the transmission of power and signal, as well as the raising and lowering of the static cone penetration test device, without having to consider any high-pressure oil pipe limitations. When the underwater working depth or seabed exploration depth is increased, it can be easily expanded.

[0019] 3) Using copper oil pipes can prevent the (rubber) oil pipes from deforming and shaking when the oil pressure changes, thereby better transmitting hydraulic power fluid while better preventing the center of gravity from shifting and the device from vibrating, thus enabling better precision measurement of the borehole static penetration device in this embodiment of the invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the borehole-type static cone penetration test device according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the hydraulic power device according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of the fuel tank according to an embodiment of the present invention;

[0023] Figure 4 for Figure 3 A schematic diagram of the axial cross-sectional structure of the fuel tank shown;

[0024] Figure 5 This is a schematic diagram of the overall structure of the oil pump connecting sleeve according to an embodiment of the present invention;

[0025] Figure 6 for Figure 5 The diagram shows an axial cross-sectional view of the oil pump connecting sleeve.

[0026] Figure 7 This is an axial cross-sectional view of the connecting sleeve for the fuel tank and photoelectric compartment according to an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of the overall structure of the suspension device according to an embodiment of the present invention;

[0028] Figure 9 for Figure 8 A partial cross-sectional view of the suspension device shown.

[0029] Figure 10 This is an axial cross-sectional view of the positioner connecting cylinder according to an embodiment of the present invention. Detailed Implementation

[0030] To better understand the purpose, structure, and function of this invention, a drilling-type static cone penetration test device of this invention will be described in further detail below with reference to the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of the overall structure of the drilling-type static cone penetration test device 100 according to an embodiment of the present invention. Figure 1As shown, the borehole-type static cone penetration test device 100 of this application includes a hydraulic power unit 10, a photoelectric separation chamber 20, a suspension device 30, a valve chamber 40, a data acquisition battery chamber 50, a penetration propulsion device 60, and a probe 70 connected sequentially from top to bottom. The hydraulic power unit 10 is electrically connected to the outside via a carrying cable interface, the photoelectric separation chamber 20 is connected to the suspension device 30 via an axial positioning spring clip mechanism, the suspension device 30 is located in the middle of the borehole-type static cone penetration test device 100, and the hydraulic power unit 10, the data acquisition battery chamber 50, and the penetration propulsion device 60 are located on both sides of the suspension device 30.

[0032] Typically, the hydraulic power unit of a shallow-water borehole static cone penetration test (PCP) system is located on the drilling platform of the carrier vessel. Hydraulic oil is transported via high-pressure rubber hoses up the drill pipe to the cone assembly to drive the various hydraulic actuators. However, in deep-water conditions, due to the long umbilical cable, the high-pressure oil's dynamic hysteresis characteristics and the elastic deformation of the rubber hoses during long-distance pipeline transmission can adversely affect the control accuracy of the propulsion speed, and may even fail to meet the control accuracy requirements. According to an embodiment of the present invention, the borehole-type static cone penetration test device 100 has, on the one hand, the heaviest and longest hydraulic power unit 10, the data acquisition battery compartment 50, and the penetration propulsion device 60 are distributed and arranged on the upper and lower sides of the suspension device 30. Through this arrangement, the suspension device 30 is designed to be approximately located at the geometric center and center of gravity of the borehole-type static cone penetration test device 100, making the borehole-type static cone penetration test device 100 more stable and uniform during penetration, thereby achieving better precision measurement. On the other hand, by adopting the arrangement of integrating the hydraulic power unit 10 into the borehole-type static cone penetration test device 100 downhole, the deck system and the borehole-type static cone penetration test device 100 only need to be connected by a single carrying cable to realize the transmission of electrical energy and signals, as well as the lifting and lowering of the borehole-type static cone penetration test device 100, without having to consider any high-pressure oil pipe limitations. When increasing the underwater working depth or seabed exploration depth, it can be easily expanded.

[0033] Please refer to Figure 1 and Figure 2 In some embodiments, the hydraulic power unit 10 includes a motor 11, an oil pump 12, and an oil tank 13, wherein the oil tank 13 has a function of seawater compensating for the hydraulic oil level.

[0034] In this application, the oil tank 13 is used to fill the hydraulic oil medium and also has the function of seawater to compensate the hydraulic oil level; the motor 11 serves as a power source and is combined with the oil pump 12 to drive the hydraulic power of each hydraulic actuator in the borehole static penetration test device 100.

[0035] Please continue to refer to Figure 2In some embodiments, the hydraulic power unit 10 further includes: a 4-core connector 101, an oil pump transition block 102, a cable junction box 103, an oil pump connecting seat 104, and an oil tank transition connector 105. The oil pump 12 and the cable junction box 103 are fixed in the oil pump connecting seat 104 by the oil pump transition block 102. The motor 11, the oil pump connecting seat 104, and the oil tank transition connector 105 are axially connected in sequence. The 4-core connector 101 is located at the output end of the motor 11.

[0036] In this application, the 4-core connector 101 can form an electrical connection with the external deck system through the carrying cable interface and the anti-bending rubber head, so as to realize the transmission of electrical energy and signals, as well as the raising and lowering of the drilling static cone penetrometer 100.

[0037] Please continue to refer to Figure 2 In some embodiments, the outer wall of the oil pump connector 104 at the location where the oil pump 12 and the junction box 103 are placed is formed with a radial through groove 106, which can be used to observe the internal connection.

[0038] Please refer to Figure 3 and Figure 4 In some embodiments, the fuel tank 13 includes a fuel tank end cap 131, a fuel tank outer cylinder 132, and a fuel tank rear end cap 133 connected axially in sequence. The fuel tank rear end cap 133 is connected to the fuel tank transition joint 105 through an oil pump connecting sleeve 15. The fuel tank 13 also includes a filter 134, a fuel tank piston rod 135, and a fuel tank compensation piston 136. The fuel tank piston rod 135 and the fuel tank compensation piston 136 are disposed inside the fuel tank outer cylinder 132 and are sealed at both ends to the fuel tank end cap 131 and the fuel tank rear end cap 133. The fuel tank compensation piston 136 is sealed and sleeved on the inner wall of the fuel tank piston rod 135 and the fuel tank outer cylinder 132. The filter 134 is disposed inside the fuel tank end cap 131 and its two ends communicate with the inside of the fuel tank outer cylinder 132 and the outside of the fuel tank rear end cap 133.

[0039] As can be seen from the above description, the integration of the motor 11, oil pump 12 and oil tank 13 in the drilling static cone penetration test device 100 according to the embodiments of the present invention is better and more adaptable to the overall structural form of the drilling static cone penetration test device 100, thereby improving its ease of use.

[0040] Please refer to Figure 5 and Figure 6In some embodiments, the hydraulic power unit 10 further includes an oil pump connecting sleeve 15 for connecting the oil tank transition joint 105 and the oil tank rear end cover 133. The oil pump connecting sleeve 15 includes a first sleeve body 151. The first end 152 of the first sleeve body 151 is threadedly connected to the oil tank transition joint 105. The second end 153 of the first sleeve body 151 is sleeved and fixed to the oil tank rear end cover 133 by a plurality of screws. An observation through groove 154 is formed on the outer peripheral wall of the first sleeve body 151. A radial through hole 155 for the plurality of screws to pass through is formed on the outer peripheral wall of the second end 153 of the first sleeve body 151. A plurality of threaded connection holes 1331 are formed at the position of the connecting screws on the oil tank rear end cover 133.

[0041] Please refer to Figure 7 In some embodiments, the hydraulic power unit 10 further includes an oil tank-photovoltaic compartment connecting sleeve 14 for connecting the oil tank end cap 131 and the photoelectric separation compartment 20. The oil tank-photovoltaic compartment connecting sleeve 14 includes a second sleeve body 141. The first end 142 of the second sleeve body 141 is sleeved and fixed to the oil tank end cap 131 by a plurality of screws. The second end 143 of the second sleeve body 141 is threadedly connected to the end of the photoelectric separation compartment 20. The outer peripheral wall of the first end 142 of the second sleeve body 141 is formed with a radial through hole 144 for the plurality of screws to pass through. The position of the oil tank end cap 131 for connecting screws is formed with a plurality of threaded connecting holes 1311.

[0042] In this application, by setting the oil pump connecting sleeve 15 and the oil tank photoelectric compartment connecting sleeve 14, the connection of components can be facilitated, thereby improving the convenience of installation and disassembly and reducing the difficulty of operation and maintenance.

[0043] In some embodiments, the oil pipes within the hydraulic power unit 10 that connect the oil pump 12, the oil tank 13, and the actuator are made of metal. Preferably, the metal material is copper. In this application, the distance between the oil pump 12, the oil tank 13, and the actuator of the hydraulic power unit 10 is relatively short, so copper oil pipes can be used instead of rubber oil pipes. Therefore, the effects of hydraulic hysteresis characteristics and elastic deformation of the oil pipes can be ignored. With this arrangement, using copper oil pipes can prevent deformation and vibration of the (rubber) oil pipes when the oil pressure changes, thereby better transmitting hydraulic power fluid while better preventing center of gravity shift and device vibration, thus enabling better precision measurement of the drilling-type static cone penetrometer 100 of this embodiment of the invention.

[0044] Please refer to Figure 8 and Figure 9In some embodiments, the suspension device 30 includes an axial positioning spring clip mechanism 31, which includes a spring clip seat 32, a locator end cap 33, and a locator connecting seat 34 connected axially in sequence. A shear ring 35 is provided on the locator connecting seat 34. The end of the spring clip seat 32 is connected to the valve chamber 40, and the locator connecting seat 34 is connected to the photoelectric separation chamber 20.

[0045] Please continue to refer to Figure 8 and Figure 9 Furthermore, the axial positioning spring-loaded mechanism 31 should also include a spring plate 36, a compression spring 37, a movable shaft 38, a connecting pin 39, a connecting plate 391, and a chuck 392. Each component can be conventionally configured using the existing axial positioning spring-loaded mechanism 31.

[0046] Please refer to Figure 10 In some embodiments, the suspension device 30 further includes a locator connecting cylinder 80, which includes a third sleeve body 81. The first end 82 of the third sleeve body 81 is fixed to the locator connecting cylinder by a plurality of screws. The second end 83 of the third sleeve body 81 is threadedly connected to the photoelectric separation chamber 20. An observation through groove 84 is formed on the outer peripheral wall of the third sleeve body 81. A radial through hole 85 for a plurality of screws to pass through is formed on the outer peripheral wall of the first end 82 of the third sleeve body 81. A plurality of threaded connection holes 341 are formed at the position of the locator connecting seat 34 for connecting screws.

[0047] In this application, the locator connecting cylinder 80 facilitates the connection of components, thereby improving the convenience of installation and disassembly and reducing the difficulty of operation and maintenance.

[0048] It should also be noted that in the above technical solutions, the photoelectric separation chamber 20, valve chamber 40, acquisition battery chamber 50, penetration propulsion device 60 and probe 70 can all adopt structural components with the same function in the existing technology in the same field.

[0049] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0050] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0051] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0052] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A drilling-type static cone penetration test device, characterized in that, The device includes, from top to bottom, a hydraulic power unit, a photoelectric separation chamber, a suspension device, a valve chamber, a data acquisition battery compartment, a penetration propulsion device, and a probe. The hydraulic power unit is electrically connected to an external power source via a load-bearing cable interface. The photoelectric separation chamber is connected to the suspension device via an axial positioning spring-loaded mechanism. The suspension device is located in the middle of the borehole-type static penetration test device. The hydraulic power unit, the data acquisition battery compartment, and the penetration propulsion device are positioned on either side of the suspension device. The hydraulic power unit includes a motor, an oil pump, and an oil tank. The oil tank has a seawater compensation function for the hydraulic oil level. The oil tank includes an oil tank end cover, an oil tank outer cylinder, and an oil tank rear end cover connected axially in sequence. The oil tank rear end cover is connected to the oil tank transition joint through an oil pump connecting sleeve. The oil tank also includes a filter, an oil tank piston rod, and an oil tank compensation piston. The oil tank piston rod and the oil tank compensation piston are disposed inside the oil tank outer cylinder and are sealed at both ends to the oil tank end cover and the oil tank rear end cover. The oil tank compensation piston is sealed and sleeved on the inner wall of the oil tank piston rod and the oil tank outer cylinder. The filter is disposed inside the oil tank end cover and its two ends communicate with the inside of the oil tank outer cylinder and the outside of the oil tank rear end cover. The hydraulic power unit further includes: a 4-core connector, an oil pump transition block, a junction box, an oil pump connecting seat, and an oil tank transition connector. The oil pump and the junction box are fixed in the oil pump connecting seat by the oil pump transition block. The motor, the oil pump connecting seat, and the oil tank transition connector are axially connected in sequence. The 4-core connector is located at the output end of the motor. The hydraulic power unit also includes an oil pump connecting sleeve for connecting the oil tank transition connector and the rear end cover of the oil tank.

2. The drilling-type static cone penetration test device according to claim 1, characterized in that, The outer wall of the oil pump connector, located at the position where the oil pump and the junction box are placed, has a radial through groove.

3. The drilling-type static cone penetration test device according to claim 1, characterized in that, The oil pump connecting sleeve includes a first sleeve body. The first end of the first sleeve body is threadedly connected to the oil tank transition joint. The second end of the first sleeve body is fixed to the oil tank rear end cover by a plurality of screws. An observation through groove is formed on the outer peripheral wall of the first sleeve body. A radial through hole for the plurality of screws to pass through is formed on the outer peripheral wall of the second end of the first sleeve body. A plurality of threaded connection holes are formed at the position of the connecting screws on the oil tank rear end cover.

4. The drilling-type static cone penetration test device according to claim 1, characterized in that, The hydraulic power unit also includes an oil tank-photovoltaic compartment connecting sleeve for connecting the oil tank end cap and the photovoltaic separation compartment. The oil tank-photovoltaic compartment connecting sleeve includes a second sleeve body. The first end of the second sleeve body is sleeved and fixed to the oil tank end cap by a plurality of screws. The second end of the second sleeve body is threadedly connected to the end of the photovoltaic separation compartment. The outer peripheral wall of the first end of the second sleeve body is formed with a radial through hole for the plurality of screws to pass through. The position of the oil tank end cap for connecting screws is formed with a plurality of threaded connection holes.

5. The drilling-type static cone penetration test device according to any one of claims 1-4, characterized in that, The oil pipes in the hydraulic power unit that connect the oil pump, the oil tank, and the actuator are made of metal.

6. The drilling-type static cone penetration test device according to any one of claims 1-4, characterized in that, The suspension device includes an axial positioning spring clip mechanism, which includes a spring clip seat, a positioner end cap, and a positioner connecting seat connected axially in sequence. The positioner connecting seat is provided with a shear ring. The end of the spring clip seat is connected to the valve chamber, and the positioner connecting seat is connected to the photoelectric separation chamber.

7. The drilling-type static cone penetration test device according to claim 6, characterized in that, The suspension device further includes a locator connecting cylinder, which includes a third sleeve body. The first end of the third sleeve body is fixed to the locator connecting seat by a plurality of screws. The second end of the third sleeve body is threadedly connected to the photoelectric separation chamber. An observation through groove is formed on the outer peripheral wall of the third sleeve body. A radial through hole for a plurality of screws to pass through is formed on the outer peripheral wall of the first end of the third sleeve body. A plurality of threaded connection holes are formed at the position of the locator connecting seat for connecting screws.

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