Pressure chamber feeding valve driven by differential pressure and provided with sampling opening and operation method

Abstract

The invention relates to a pressure chamber feeding valve driven by differential pressure and provided with a sampling port and an operation method. The pressure chamber feeding valve comprises a valve body, a valve element is installed in the valve body in a matched mode, a driving mechanism is fixedly installed on the top face of the valve body, and the valve body and the valve element move relatively through screwing and unscrewing actions of the driving mechanism; compared with a ball valve feeding and throttling valve sampling scheme, the sealing performance is better after feeding and sampling under the condition that pressure exists in the pressure chamber, the safety is higher, and the cost is lower; when the valve core reciprocates once, one-time feeding and sampling are completed at the same time, so that the use efficiency is higher; the sampling volume of each time is controlled, and the pressure fluctuation risk of the pressure chamber is reduced; the whole integrated operation is more convenient, the working reliability is good, the efficiency is high, and the safety coefficient is high. In addition, the caliber of the valve channel can be modified according to the size of deep-sea animal food, so that the deep-sea animal can pass more easily.

Description

Technical Field

[0001] The invention relates to the technical field of deep-sea animal land culture equipment, in particular to a pressure chamber feeding valve with a sampling port driven by pressure difference and an operation method thereof. Background Art

[0002] The pressure chamber feeding valve with a sampling port is driven by pressure difference to feed deep-sea animals and sample the environmental medium. The equipment is connected to a pressure chamber that simulates the deep sea and a loading system that pressurizes the pressure chamber. Through regular feeding and sampling, long-term cultivation of deep-sea animals is achieved, providing an experimental basis for research on deep-sea animals.

[0003] At present, the existing technology of feeding bait in pressure chambers generally adopts a series ball valve, which needs to be installed on the top of the pressure chamber, and the ball valves are opened and closed in sequence and the bait falls into the pressure chamber by its own gravity. The feeding effect is very dependent on the position and direction of the series ball valve and its outlet pipeline, which is inconvenient to operate and has high cost. When the pressure chamber is in a high-pressure or even ultra-high-pressure environment, when a large-caliber ball valve is used for feeding bait, the sealing performance deteriorates after repeated use, and it is easy to leak and have low safety. In addition, when sampling in the pressure chamber, a throttle valve needs to be used through different interfaces, and the single discharge volume of the medium is not controlled, which easily causes the pressure fluctuation of the pressure chamber to exceed the tolerance. In summary, the existing pressure chamber feeding and sampling operations are inconvenient to operate, costly, easy to leak, and have low safety. Summary of the invention

[0004] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a pressure chamber feeding valve with a sampling port driven by pressure difference and an operating method, which can conveniently realize the feeding of deep-sea animal bait and the sampling of the environmental medium in which they are located. The overall integrated operation is easier, the working reliability is good, the efficiency is high, and the safety factor is high.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A pressure chamber feeding valve with a sampling port driven by pressure difference comprises a valve body, a valve core is installed in the valve body, a driving mechanism is fixedly installed on the top surface of the valve body, and the valve body and the valve core are relatively moved by tightening and loosening the driving mechanism;

[0007] The structure of the valve body is as follows: it comprises a pressure-bearing shell with an open top, a pressure inlet and a pressure outlet are arranged perpendicular to the axis direction of the pressure-bearing shell, a feeding port is arranged below the pressure inlet, a sampling port is arranged above the pressure outlet, and a proximity switch is installed at the bottom of the pressure-bearing shell;

[0008] The structure of the valve core is as follows: it includes a core body, the top surface of the core body is provided with a No. 1 threaded hole and a No. 2 threaded hole connected to the driving mechanism, a short-range through hole and a long-range through hole are provided perpendicular to the axial direction of the core body and are parallel and spaced, and a plurality of sealing grooves are provided on the outside of the core body, and O-type sealing rings are installed in the sealing grooves;

[0009] The structure of the driving mechanism is as follows: it includes an operating rod, the operating rod passes through a guide block, a No. 1 connecting rod and a No. 2 connecting rod are symmetrically arranged on the guide block, the No. 1 connecting rod and the No. 2 connecting rod are fixed to the pressure-bearing shell at the same time, and a valve stem is fixedly installed at the bottom of the guide block and the operating rod, and the bottom of the valve stem is fixed to the core body by a fastener.

[0010] Its further technical solution is:

[0011] When the valve core moves to the bottom of the valve body, the short-range through hole, the sealing ring and the pressure-bearing shell form a pressure-bearing cavity, which is concentrically connected to the pressure inlet and the pressure outlet, and at the same time, the long-range through hole is concentrically connected to the feeding port; when the valve core moves to the end of the valve body, the long-range through hole, the sealing ring and the pressure-bearing shell form a pressure-bearing cavity, which is concentrically connected to the pressure inlet and the pressure outlet, and at the same time, the short-range through hole is concentrically connected to the sampling port; the valve core moves once from the bottom to the end relative to the valve body, thereby realizing the entry of bait into the pressure chamber and the discharge of a fixed volume of environmental medium out of the pressure chamber.

[0012] The valve body and the valve core both adopt an integrated structure.

[0013] The valve body is in a cylindrical structure with a hollow interior.

[0014] The valve core adopts a cylindrical structure.

[0015] The operating rod is an integrated structure of a handle and a stud.

[0016] The stud is connected to the valve stem through a fixing nut, and the valve core and the valve body can be moved relative to each other in the axial direction by rotating the operating rod handle.

[0017] The cross section of the guide block is a "π"-shaped structure.

[0018] The cross section of the valve stem is a "π"-shaped structure.

[0019] An operating method for driving a pressure chamber feeding valve with a sampling port by using a pressure difference comprises the following operating procedures:

[0020] Step 1: The pressure shell is fixed horizontally, the feeding port is vertically upward, the pressure inlet is connected to the loading system through the high-pressure inlet pipe, and the pressure outlet is connected to the pressure chamber inlet through the pressure outlet pipe. The driving mechanism tightens the valve stem by rotating the operating rod, that is, the valve core moves to the bottom of the valve body, the short-range through hole is concentrically connected with the pressure inlet and the pressure outlet, and the long-range through hole is concentrically connected with the feeding port;

[0021] Step 2: Put the bait into the feeding port, and then let the bait enter the remote through hole;

[0022] Step 3: The driving mechanism rotates the operating rod in the opposite direction to release the valve stem, that is, when the valve core moves to the end of the valve body, the remote through hole is connected concentrically with the pressure inlet and the pressure outlet, and the loading system is started to push the bait through the pressure inlet, the pressure outlet, and the pressure outlet pipeline into the pressure chamber; at the same time, the short-range through hole is connected concentrically with the sampling port, and the high-pressure medium in the pressure chamber becomes a normal pressure state, which can be taken out from the sampling port for analysis;

[0023] Step 4: The driving mechanism rotates the operating rod forward to tighten the valve stem, that is, when the valve core moves to the bottom of the valve body, the short-range through hole is concentrically connected with the pressure inlet and pressure outlet, and the long-range through hole is concentrically connected with the sampling port, completing one baiting and sampling.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention has a compact and reasonable structure and is easy to operate. Through the cooperation of the uniquely designed valve body, valve core, drive mechanism, pressure chamber, pipeline and loading system and other components, it can conveniently complete the feeding of deep-sea animal bait and sampling of the environmental medium in the deep-sea high-pressure environment. The overall integrated operation is easier, the working reliability is good, the efficiency is high, and the safety factor is high.

[0026] Compared with the ball valve baiting and throttle valve sampling solutions, the present invention has better sealing performance after baiting and sampling under pressure in the pressure cabin, higher safety and lower cost.

[0027] The valve core of the present invention reciprocates once, and baiting and sampling are completed at the same time, which has higher utilization efficiency; and the sampling volume each time can be controlled, thereby reducing the risk of pressure fluctuation in the pressure chamber.

[0028] The present invention can modify the valve channel caliber according to the size of deep-sea animal food, making it easier for the food to pass through. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the internal structure of the present invention.

[0030] Figure 2 Schematic diagram of the internal structure of the valve body of the present invention.

[0031] Figure 3 It is a schematic diagram of the internal structure of the valve core of the present invention.

[0032] Figure 4 Schematic diagram of the internal structure of the driving mechanism of the present invention.

[0033] Figure 5It is a schematic diagram of the internal structure when the valve core of the present invention is at the end.

[0034] Figure 6 It is a schematic diagram of the internal structure when the valve core of the present invention is in the middle.

[0035] Figure 7 This is a schematic diagram of the structure of the connection between the pressure chamber and the loading system during baiting and sampling of the present invention.

[0036] in:

[0037] 001, valve body; 002, valve core; 003, driving mechanism; 004, pressure chamber; 005, pressure outlet pipe; 006, high pressure inlet pipe; 007, deep-sea animals; 008, loading system;

[0038] 111, pressure shell; 121, pressure inlet; 122, pressure outlet; 123, feeding port; 124, sampling port; 125, proximity switch; 131, No. 1 threaded hole; 132, No. 2 threaded hole;

[0039] 211, core body; 221, short-range through hole; 222, long-range through hole; 231, O-ring; 241, sealing groove; 251, No. 3 threaded hole; 252, No. 4 threaded hole;

[0040] 311, operating rod; 321, guide block; 331, valve stem; 341, connecting rod No. 1; 342, connecting rod No. 2; 351, upper fastening nut; 352, lower fastening nut; 353, locking nut; 354, fixing nut. DETAILED DESCRIPTION

[0041] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0042] like Figure 1-Figure 7 As shown, the pressure chamber feeding valve with a sampling port driven by pressure difference in this embodiment includes a valve body 001, a valve core 002 is installed in the valve body 001, and a driving mechanism 003 is fixedly installed on the top surface of the valve body 001. The valve body 001 and the valve core 002 move relative to each other through the tightening and loosening actions of the driving mechanism 003;

[0043] The structure of the valve body 001 is as follows: it comprises a pressure-bearing shell 111 with an open top, a pressure inlet 121 and a pressure outlet 122 are arranged perpendicular to the axis direction of the pressure-bearing shell 111, a feeding port 123 is arranged below the pressure inlet 121, a sampling port 124 is arranged above the pressure outlet 122, and a proximity switch 125 is installed at the bottom of the pressure-bearing shell 111; the top surface of the pressure-bearing shell 111 is provided with symmetrical No. 1 threaded hole 131 and No. 2 threaded hole 132;

[0044] The structure of the valve core 002 is as follows: it includes a core body 211, the top surface of the core body 211 is provided with a No. 3 threaded hole 251 and a No. 4 threaded hole 252 connected to the driving mechanism 003, a short-range through hole 221 and a long-range through hole 222 are provided perpendicularly to the axial direction of the core body 211 and are parallel and spaced, and a plurality of sealing grooves 241 are provided on the outside of the core body 211, and an O-type sealing ring 231 is installed in the sealing groove 241;

[0045] The structure of the driving mechanism 003 is: including an operating rod 311, the operating rod 311 passes through a guide block 321, and a connecting rod No. 1 341 and a connecting rod No. 2 342 are symmetrically arranged on the guide block 321. The connecting rod No. 1 341 and the connecting rod No. 2 342 are fixed to the pressure-bearing shell 111 at the same time, and the bottom of the guide block 321 and the operating rod 311 are fixedly installed with a valve stem 331, and the bottom of the valve stem 331 is fixed to the core body 211 by fasteners.

[0046] When the valve core 002 moves to the bottom of the valve body 001, the short-range through hole 221, the sealing ring and the pressure-bearing shell 111 form a pressure-bearing cavity, which is concentrically connected to the pressure inlet 121 and the pressure outlet 122, and at the same time, the long-range through hole 222 is concentrically connected to the feeding port 123; when the valve core 002 moves to the end of the valve body 001, the long-range through hole 222, the sealing ring and the pressure-bearing shell 111 form a pressure-bearing cavity, which is concentrically connected to the pressure inlet 121 and the pressure outlet 122, and at the same time, the short-range through hole 221 is concentrically connected to the sampling port 124; the valve core 002 moves once from the bottom to the end relative to the valve body 001, and at the same time, the bait enters the pressure chamber 004 and the fixed volume of environmental medium is discharged from the pressure chamber 004.

[0047] The valve body 001 and the valve core 002 both adopt an integrated structure.

[0048] The valve body 001 has a cylindrical structure with a hollow interior.

[0049] The valve core 002 adopts a cylindrical structure.

[0050] The operating rod 311 is an integrated structure of a handle and a stud.

[0051] The stud is connected to the valve stem 331 through a fixing nut 354, and the valve core 002 and the valve body 001 can move relative to each other in the axial direction by rotating the handle of the operating rod 311.

[0052] The cross section of the guide block 321 is a “π”-shaped structure.

[0053] The cross section of the valve stem 331 is a "π"-shaped structure.

[0054] like Figure 1-Figure 7 As shown, the specific structure and function of a pressure tank feeding valve with a sampling port driven by pressure difference described in this embodiment are as follows:

[0055] It mainly includes valve core 002, valve body 001 and driving mechanism 003.

[0056] The valve core 002 is integrally built into the valve body 001 , and the two are connected to the driving mechanism 003 through threads. The valve body 001 and the valve core 002 are relatively moved by tightening and loosening the driving mechanism 003 .

[0057] When the valve core 002 moves to the bottom of the valve body 001 , the short-range through hole 221 , the O-ring 231 and the pressure-bearing shell 111 form a pressure-bearing cavity which is concentrically connected to the pressure inlet 121 and the pressure outlet 122 . Meanwhile, the long-range through hole 222 is concentrically connected to the feeding port 123 .

[0058] Similar to the above, when the valve core 002 moves to the end of the valve body 001, the long-range through hole 222, the sealing ring and the pressure-bearing shell 111 form a pressure-bearing cavity and are concentrically connected to the pressure inlet 121 and the pressure outlet 122. At the same time, the short-range through hole 221 is concentrically connected to the sampling port 124. The valve core 002 moves once from the bottom to the end relative to the valve body 001, and at the same time, the bait enters the pressure chamber 004 and the fixed volume of environmental medium is discharged from the pressure chamber 004. There are deep-sea animals 007 in the pressure chamber 004.

[0059] The valve core 002 adopts a cylindrical structure, and two parallel circular holes are provided perpendicular to the valve core 002 along the axial direction to form a short-range through hole 221 and a long-range through hole 222, and eight sealing rings are provided on the surface.

[0060] The valve body 001 adopts an internal hollow cylindrical structure, and is provided with four parallel holes along the axial direction perpendicular to the pressure-bearing shell 111, forming a pressure inlet 121, a pressure outlet 122, a feeding port 123, and a sampling port 124. A threaded hole is provided at the bottom to install a proximity switch 125, and a large opening at the end facilitates the entry and exit of the valve core 002.

[0061] When the valve core 002 is at the end of the valve body 001, the sealing rings on both sides of the remote through hole 222 and the remote through hole 222 and the pressure-bearing shell 111 form a pressure-bearing cavity, the pressure inlet 121 and the pressure outlet 122 are concentric with the remote through hole 222, and the sampling port 124 is concentric with the short-range through hole 221.

[0062] When the valve core 002 is at the bottom of the valve body 001, the sealing rings on both sides of the proximal through hole 221 and the proximal through hole 221 and the pressure-bearing shell 111 form a pressure-bearing cavity, the pressure inlet 121 and the pressure outlet 122 are concentric with the proximal through hole 221, and the feeding port 123 is concentric with the remote through hole 222.

[0063] When the valve core 002 and the valve body 001 move relative to each other, the pressure inlet 121 , the pressure outlet 122 , the pressure-bearing housing 111 , and at least two of the eight sealing rings on the valve core 002 always form a pressure-bearing cavity.

[0064] A proximity switch 125 is threadedly installed at the bottom of the valve body 001 to detect the relative movement position of the valve core 002 and the valve body 001 and to count the number of times of feeding and sampling.

[0065] The driving mechanism 003 includes a connecting rod No. 1 341 and a connecting rod No. 2 342. Both the connecting rod No. 1 341 and the connecting rod No. 2 342 are stud structures, one end of which is fastened to the valve body 001 through a lower fastening nut 352, and the other end is fastened to the guide block 321 through an upper fastening nut 351. A threaded hole is provided in the center of the guide block 321 to connect the operating rod 311, and the connecting rod passes through the through hole on the valve stem 331. The valve stem 331 is fastened to the valve core 002 through a locking nut 353.

[0066] The operating rod 311 is an integrated structure of a handle and a stud, the stud is connected to the valve stem 331 through a fixing nut 354, and the valve core 002 and the valve body 001 can be moved relative to each other in the axial direction by rotating the handle of the operating rod 311;

[0067] The actual work process is completed through the following steps:

[0068] Step 1: The pressure shell 111 is fixed horizontally, the feeding port 123 is vertically upward, the pressure inlet 121 is connected to the loading system 008 through the high-pressure inlet pipe 006, and the pressure outlet 122 is connected to the inlet of the pressure chamber 004 through the pressure outlet pipe 005. The driving mechanism 003 rotates the operating rod 311 to tighten the valve stem 331, that is, the valve core 002 moves to the bottom of the valve body 001, the short-range through hole 221 is concentrically connected with the valve pressure inlet 121 and the pressure outlet 122, and the long-range through hole 222 is concentrically connected with the feeding port 123;

[0069] Step 2: Feed the bait into the feeding port 123, and then allow the bait to enter the remote through hole 222;

[0070] Step 3: The driving mechanism 003 rotates the operating rod 311 in the reverse direction to make the valve stem 331 in the loosened state, that is, when the valve core 002 moves to the end of the valve body 001, the remote through hole 222 is connected concentrically with the pressure inlet 121 and the pressure outlet 122, and the loading system 008 is started to push the bait through the pressure inlet 121, the pressure outlet 122, and the pressure outlet pipe 005 to enter the pressure chamber 004; at the same time, the short-range through hole 221 is connected concentrically with the sampling port 124, and the high-pressure medium of the pressure chamber 004 becomes a normal pressure state, and can be taken out from the sampling port 124 for analysis;

[0071] Step 4: The driving mechanism 003 rotates the operating rod 311 in the forward direction to tighten the valve stem 331, that is, when the valve core 002 moves to the bottom of the valve body 001, the short-range through hole 221 is concentrically connected with the pressure inlet 121 and the pressure outlet 122, and the long-range through hole 222 is concentrically connected with the sampling port 124, completing one baiting and sampling.

[0072] As can be seen from the above, the valve core 002 reciprocates once, and at the same time, the pressure chamber 004 completes baiting and sampling once, and the number of baiting and sampling is counted by detecting the signal of the proximity switch 125.

[0073] Embodiment 1:

[0074] This embodiment uses pressure difference to drive the pressure chamber feeding valve with a sampling port. Its structure includes a valve core 002, a valve body 001 and a driving mechanism 003. The pressure-bearing shell 111 of the valve body 001 is fixed horizontally, and the feeding port 123 is vertically upward. The pressure inlet 121 is connected to the loading system 008 through the high-pressure inlet pipeline 006, and the pressure outlet 122 is connected to the inlet of the simulated deep-sea 110MPa, 200L pressure chamber 004 through the pressure outlet pipeline 005. The driving mechanism 003 is operated to make the valve core 002 reciprocate once relative to the valve body 001, and a φ20mm bait is put in and about 25mL of environmental medium is sampled, which is more efficient. Compared with the ball valve baiting and throttle valve sampling scheme, the sealing is better after baiting and sampling under the pressure of 110MPa in the pressure chamber 004, which is safer and less costly. The sampling volume is controlled to 25mL each time, reducing the risk of pressure fluctuation in the pressure chamber 004. In addition, by detecting the signal of the proximity switch 125 to count the number of baiting and sampling, the long-term cultivation of 11,000-meter deep-sea animals can be achieved, providing an experimental basis for the research work of 11,000 deep-sea animals.

[0075] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A pressure tank feeding valve with a sampling port driven by pressure difference, characterized in that: The valve body (001) comprises a valve core (002) installed in the interior of the valve body (001), and a driving mechanism (003) is fixedly installed on the top surface of the valve body (001). The driving mechanism (003) is tightened and loosened to cause the valve body (001) and the valve core (002) to move relative to each other. The structure of the valve body (001) is as follows: it comprises a pressure-bearing shell (111) with an opening at the top, a pressure inlet (121) and a pressure outlet (122) are arranged perpendicular to the axis direction of the pressure-bearing shell (111), a feeding port (123) is arranged below the pressure inlet (121), a sampling port (124) is arranged above the pressure outlet (122), and a proximity switch (125) is installed at the bottom of the pressure-bearing shell (111); The structure of the valve core (002) is as follows: it includes a core body (211), the top surface of the core body (211) is provided with a No. 1 threaded hole (251) and a No. 2 threaded hole (252) connected to the driving mechanism (003), a short-range through hole (221) and a long-range through hole (222) are provided in parallel and spaced apart in a perpendicular direction to the axial direction of the core body (211), a plurality of sealing grooves (241) are provided on the outside of the core body (211), and an O-type sealing ring (231) is installed in the sealing groove (241); The structure of the driving mechanism (003) is as follows: it includes an operating rod (311), the operating rod (311) passes through a guide block (321), a No. 1 connecting rod (341) and a No. 2 connecting rod (342) are symmetrically arranged on the guide block (321), the No. 1 connecting rod (341) and the No. 2 connecting rod (342) are fixed to the pressure-bearing shell (111) at the same time, and a valve stem (331) is fixedly installed at the bottom of the guide block (321) and the operating rod (311), and the bottom of the valve stem (331) is fixed to the core body (211) by a fastener.

2. A pressure tank feeding valve with a sampling port driven by pressure difference as claimed in claim 1, characterized in that: When the valve core (002) moves to the bottom of the valve body (001), the short-range through hole (221), the sealing ring and the pressure-bearing shell (111) form a pressure-bearing cavity, which is concentrically connected to the pressure inlet (121) and the pressure outlet (122), and at the same time, the long-range through hole (222) is concentrically connected to the feeding port (123); when the valve core (002) moves to the end of the valve body (001), the long-range through hole (222), the sealing ring and the pressure-bearing shell (111) form a pressure-bearing cavity, which is concentrically connected to the pressure inlet (121) and the pressure outlet (122), and at the same time, the short-range through hole (221) is concentrically connected to the sampling port (124); the valve core (002) moves once from the bottom to the end relative to the valve body (001), thereby realizing the entry of bait into the pressure chamber (004) and the discharge of a fixed volume of environmental medium from the pressure chamber (004).

3. A pressure tank feeding valve with a sampling port driven by pressure difference as claimed in claim 1, characterized in that: The valve body (001) and the valve core (002) both adopt an integrated structure.

4. A pressure tank feeding valve with a sampling port driven by pressure difference as claimed in claim 1, characterized in that: The valve body (001) has a cylindrical structure with a hollow interior.

5. A pressure tank feeding valve with a sampling port driven by pressure difference as claimed in claim 1, characterized in that: The valve core (002) adopts a cylindrical structure.

6. A pressure tank feeding valve with a sampling port driven by pressure difference as claimed in claim 1, characterized in that: The operating rod (311) is an integrated structure of a handle and a stud.

7. A pressure tank feeding valve with a sampling port driven by pressure difference as claimed in claim 6, characterized in that: The stud is connected to the valve stem (331) via a fixing nut (354), and the relative movement of the valve core (002) and the valve body (001) in the axial direction is achieved by rotating the handle of the operating rod (311).

8. The pressure tank feeding valve with a sampling port driven by pressure difference as claimed in claim 1, characterized in that: The cross section of the guide block (321) is a "π"-shaped structure.

9. A pressure tank feeding valve with a sampling port driven by pressure difference as claimed in claim 1, characterized in that: The cross section of the valve stem (331) is a "π"-shaped structure.

10. An operating method for driving a pressure tank feeding valve with a sampling port by using a pressure difference as claimed in claim 1, characterized in that: The following operation procedures are included: Step 1: The pressure-bearing shell (111) is fixed horizontally, the feeding port (123) is vertically upward, the pressure inlet (121) is connected to the loading system (008) through the high-pressure inlet pipe (006), and the pressure outlet (122) is connected to the inlet of the pressure chamber (004) through the pressure outlet pipe (005). The driving mechanism (003) rotates the operating rod (311) to tighten the valve stem (331), that is, the valve core (002) moves to the bottom of the valve body (001), the short-range through hole (221) is concentrically connected with the pressure inlet (121) and the pressure outlet (122), and the long-range through hole (222) is concentrically connected with the feeding port (123); Step 2: feeding bait into the feeding port (123), and then allowing the bait to enter the remote through hole (222); Step 3: The driving mechanism (003) rotates the operating rod (311) in the opposite direction to release the valve stem (331), that is, when the valve core (002) moves to the end of the valve body (001), the remote through hole (222) is connected concentrically with the pressure inlet (121) and the pressure outlet (122), and the loading system (008) is started to push the bait through the pressure inlet (121), the pressure outlet (122), and the pressure outlet pipe (005) into the pressure chamber (004) by means of the pressure difference; at the same time, the short-range through hole (221) is connected concentrically with the sampling port (124), and the high-pressure medium in the pressure chamber (004) becomes a normal pressure state, and can be taken out from the sampling port (124) for analysis; Step 4: The driving mechanism (003) rotates the operating rod (311) in the forward direction to tighten the valve stem (331). That is, when the valve core (002) moves to the bottom of the valve body (001), the short-range through hole (221) is concentrically connected with the pressure inlet (121) and the pressure outlet (122), and the long-range through hole (222) is concentrically connected with the sampling port (124), thereby completing one baiting and sampling operation.

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