A tank applied to inhibit extraction volatilization process

Abstract

The application discloses a storage tank applied to inhibiting extraction volatilization process, which comprises a tank body, a flow-through opening is arranged at the top of the tank body, a connecting unit is arranged on the tank body, the connecting unit comprises a fixed connector connected with the flow-through opening and a movable connector detachably connected with the fixed connector, the fixed connector is provided with a first through hole penetrating through the fixed connector, the movable connector is provided with a second through hole penetrating through the movable connector, and an exhaust main pipe is connected with the movable connector through a pipeline; in the inhibiting extraction volatilization process, the connecting unit is adopted to connect the tank body and the exhaust main pipe, the connecting unit has a clever structure, can quickly connect the flow-through opening and branch pipes of the exhaust main pipe, and is convenient to disassemble.

Description

Technical Field

[0001] This invention relates to the field of storage tanks, and in particular to a storage tank used in extraction and volatilization processes. Background Technology

[0002] my country's new energy vehicle industry is developing rapidly. According to the my country Automotive Technology Research Center, by 2025, the amount of scrapped power lithium batteries will exceed 750,000 tons, with a market size exceeding 10 billion yuan. Currently, my country's power lithium battery recycling industry has taken initial shape. Recycling companies generally adopt efficient hydrometallurgical extraction processes to separate and purify metal resources such as cobalt, nickel, manganese, and lithium from waste lithium batteries.

[0003] The extraction process uses an organic extractant as a carrier and sulfonated kerosene as a diluent. In a mixing tank and clarification chamber, the metal is separated and purified from the extractant through three basic steps: extraction, washing, and back-extraction. Both the organic extractant and sulfonated kerosene are volatile organic compounds (VOCs), which are important precursors to secondary pollutants such as fine particulate matter (PM2.5) and ozone (O3), leading to atmospheric environmental problems such as haze and photochemical smog. Volatilization also causes excessive loss of the extractant and sulfonated kerosene. Furthermore, the inorganic acids used in the washing and back-extraction processes can volatilize to form acid mist, which is corrosive and toxic. This acid mist not only corrodes plant equipment and harms employee health but also contributes to acid rain, damaging the environment.

[0004] Therefore, the reliability of the device for suppressing the volatilization of organic and acid mist during extraction becomes very important. In particular, the connection between the tank body and the main pipe in the bottom tank area of ​​the extraction is crucial. It is necessary to ensure that the connection is stable and quick. However, the existing technology often uses flanges and bolts for connection, which is complicated and cumbersome. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0007] Therefore, the technical problem to be solved by the present invention is that the pipeline connection between the tank body of the bottom extraction tank area and the main pipe is particularly important. It is necessary to ensure that the connection is stable and quick. However, the existing technology often uses flanges and bolts for connection, which is complicated and cumbersome.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a storage tank for suppressing extraction volatilization process, comprising a tank body, wherein a flow port is provided at the top of the tank body;

[0009] The connecting unit includes a fixed connector connected to the flow port and a movable connector detachably connected to the fixed connector; the fixed connector is provided with a first through hole; the movable connector is provided with a second through hole; and an exhaust manifold, wherein the movable connector is connected to the exhaust manifold via a pipe.

[0010] As a preferred embodiment of the storage tank used in the extraction and volatilization process described in this invention, the end of the fixed joint connected to the movable joint is provided with a tapered surface, the outer periphery of the fixed joint is provided with an annular groove, the end of the second through hole connected to the fixed joint is provided with a circular groove, the inner side of the circular groove is provided with a guide block, and the outer periphery of the fixed joint is provided with an axial guide groove.

[0011] One end of the fixed connector is embedded in the circular groove and connected to the movable connector.

[0012] As a preferred embodiment of the storage tank used in the extraction and volatilization process described in this invention, the inner side of the circular groove is provided with a radial groove, a slider is provided in the groove, and a first spring is provided between the slider and the bottom of the groove; the two ends of the first spring are fixedly connected to the end of the slider and the bottom of the groove, respectively.

[0013] As a preferred embodiment of the storage tank used in the extraction and volatilization process described in this invention, wherein: a through groove extending to an annular groove is provided in the first through hole, a guide block is provided in the through groove, and an inclined surface is provided at one end of the guide block near the first through hole;

[0014] The radial length of the inclined surface is the same as the depth of the annular groove, and the end face of the guide block located in the annular groove is an arc surface.

[0015] As a preferred embodiment of the storage tank used in the extraction and volatilization process described in this invention, wherein: a limiting groove is provided on the side of the through groove, a limiting block is provided on the side of the guide block and embedded in the limiting groove, and a second spring is provided between the limiting block and the end face of the limiting groove away from the first through hole.

[0016] As a preferred embodiment of the storage tank used in the extraction and volatilization process described in this invention, a movable cylinder is provided inside the second through hole, an axially extending long groove is provided inside the second through hole, and a limiting pin is provided on the outer periphery of the movable cylinder, the limiting pin being embedded in the long groove.

[0017] As a preferred embodiment of the storage tank used in the extraction and volatilization process described in this invention, the movable joint is provided with an annular groove that intersects with the long groove, a rotating ring is provided in the annular groove, a first spiral groove is provided on the inner side of the rotating ring, and the limiting pin is embedded in the first spiral groove.

[0018] As a preferred embodiment of the storage tank used in the extraction and volatilization process described in this invention, a third spring is provided between the limiting pin and the end face of the annular groove near the circular groove.

[0019] As a preferred embodiment of the storage tank used in the extraction and volatilization process described in this invention, the movable joint is provided with a strip groove communicating with the annular groove, and the outer periphery of the rotating ring is provided with a second spiral groove, the direction of rotation of the second spiral groove being opposite to that of the first spiral groove.

[0020] As a preferred embodiment of the storage tank used in the extraction and volatilization process described in this invention, the movable joint is provided with a separation ring on its outer side, and a protrusion is provided on the inner side of the separation ring. The protrusion passes through the strip groove and is embedded in the second spiral groove. The moving direction of the separation ring is opposite to the moving direction of the moving cylinder.

[0021] The beneficial effects of this invention are as follows: In the process of suppressing extraction volatilization, the connection between the tank and the exhaust manifold is made by a connecting unit. The connecting unit has an ingenious structure, which can quickly connect the flow port to the branch pipe of the exhaust manifold and is easy to disassemble. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0023] Figure 1 A schematic diagram of the structure of a storage tank used in an extraction and volatilization process, as described in one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a connecting unit in a storage tank used in an extraction and volatilization process, as described in one embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the rotating ring structure in a storage tank used in an extraction and volatilization process, as described in one embodiment of the present invention.

[0026] Figure 4This is a schematic diagram of the structure of the connecting unit in the storage tank used in the process of suppressing extraction volatilization, as described in one embodiment of the present invention, before connection.

[0027] Figure 5 This is a schematic diagram of the completed connection of the connecting unit in the storage tank used in the process of suppressing extraction volatilization, according to an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the structure of the connecting unit in the storage tank used in the process of suppressing extraction volatilization, as described in one embodiment of the present invention;

[0029] Figure 7 A schematic diagram of a system according to another embodiment of the present invention. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0033] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0034] Example 1

[0035] Reference Figures 1-2 This embodiment provides a storage tank for suppressing extraction volatilization processes, including a tank body 100, with a flow port 101 at the top of the tank body 100; the tank body 100 is a sealed storage tank.

[0036] The connection unit 200 includes a fixed connector 201 connected to the flow port 101 and a movable connector 202 detachably connected to the fixed connector 201.

[0037] The fixed joint 201 is provided with a through first through hole 201a; the movable joint 202 is provided with a through second through hole 202a;

[0038] The exhaust manifold 300 and the movable joint 202 are connected to the exhaust manifold 300 via pipes. The tank body 100 is connected to the two-stage spray tower via the exhaust manifold 300. The exhaust manifold 300 is connected to the flow port 101 at the top of each storage tank d. One end of the exhaust manifold 300 is a gas manifold interface, which is connected to the extraction tail gas alkaline solution spray tower. The upper part of the tank body 100 is also equipped with an interface through which the required liquid in the storage tank is pumped in from outside the system.

[0039] A pump is installed at the bottom of the tank 100, and the liquid is pumped from the bottom extraction tank area to the mixing tank interface.

[0040] The fixed connector 201 and the movable connector 202 are detachably connected to connect the branch pipes of the exhaust main pipe 300 to the tank body 100.

[0041] Example 2

[0042] Reference Figures 1-6 This is the second embodiment of the present invention, which is based on the previous embodiment and differs from the previous embodiment in that:

[0043] The end of the fixed connector 201 that connects to the movable connector 202 is provided with a tapered surface 201b, which facilitates insertion into the movable connector 202.

[0044] The fixed connector 201 has an annular groove 201c on its outer periphery, and the second through hole 202a has a circular groove 202b at the end that connects to the fixed connector 201. When connected, the fixed connector 201 is inserted into the circular groove 202b. A guide block 202c is provided on the inner side of the circular groove 202b, and an axial guide groove 201d is provided on the outer periphery of the fixed connector 201. That is, when connected, the guide block 202c needs to be aligned with the guide groove 201d so that the fixed connector 201 and the movable connector 202 can be connected. In other words, one end of the fixed connector 201 is embedded in the circular groove 202b and connected to the movable connector 202.

[0045] Furthermore, a radial groove 202d is provided on the inner side of the circular groove 202b, and a slider 203 is provided in the groove 202d. A first spring 203a is provided between the slider 203 and the bottom of the groove 202d. The two ends of the first spring 203a are fixedly connected to the end of the slider 203 and the bottom of the groove 202d, respectively. When connected, the slider 203 passes over the conical surface 201b and is embedded in the annular groove 201c for locking. Preferably, a cavity is provided on the side of the groove 202d to limit the movement range of the slider, and a stop block is provided on the side of the slider 203 in the cavity to prevent the slider 203 from falling off.

[0046] Furthermore, a through groove 201e extending through the annular groove 201c is provided in the first through hole 201a. When the guide block 202c is aligned with the guide groove 201d, the slider 203 is aligned with the through groove 201e. A guide block 204 is provided in the through groove 201e. One end of the guide block 204 near the first through hole 201a is provided with an inclined surface 204a. That is, when it is necessary to separate the fixed joint 201 and the movable joint 202, the slider 203 can be pushed out of the annular groove 201c by operating the guide block 204.

[0047] Preferably, the radial length of the inclined surface 204a is consistent with the depth of the annular groove 201c, and the end face of the guide block 204 located in the annular groove 201c is an arc surface. When the guide block 204 pushes the slider 203 out of the annular groove 201c, the outer arc surface of the guide block 204 just coincides with the outer surface of the fixed joint 201.

[0048] The through groove 201e has a limiting groove 201f on its side, and the guide block 204 has a limiting block 204b embedded in the limiting groove 201f on its side. A second spring 204c is provided between the limiting block 204b and the end face of the limiting groove 201f away from the first through hole 201a. That is, the limiting groove 201f and the limiting block 204b limit the movement range of the guide block 204, and the function of the second spring 204c is to ensure that, without interference, one end of the inclined surface 204a of the guide block 204 is located in the first through hole 201a, and the other end is not located in the annular groove 201c.

[0049] Furthermore, a movable cylinder 205 is provided within the second through hole 202a. The movable cylinder 205 is an annular cylinder. An axially extending elongated groove 202e is provided on the inner side of the second through hole 202a. A limiting pin 205a is provided on the outer periphery of the movable cylinder 205, and the limiting pin 205a is embedded in the elongated groove 202e. That is, the movable cylinder 205 can move axially within the second through hole 202a. It should be noted that the axially movable range of the movable cylinder 205 is greater than the thickness of the guide block 204 in the axial direction of the first through hole 201a. That is, during separation, the movable cylinder 205 can pass over the through groove 201e where the guide block 204 is located.

[0050] The movable joint 202 has an annular groove 202f that intersects with the long groove 202e. A rotating ring 206 is provided in the annular groove 202f. The rotating ring 206 can rotate in the annular groove 202f. A first spiral groove 206a is provided on the inner side of the rotating ring 206. A limiting pin 205a is embedded in the first spiral groove 206a. Therefore, when the rotating ring 206 rotates, it will drive the moving cylinder 205 to move axially.

[0051] A third spring 207 is provided between the limiting pin 205a and the end face of the annular groove 202f near the circular groove 202b. When the third spring 207 is in action, its elastic force pushes the moving cylinder 205 so that it is located inside the second through hole 202a. When the fixed joint 201 and the movable joint 202 are in contact, the end face of the moving cylinder 205 coincides with the side of the inclined surface 204a near the moving cylinder 205. Therefore, when the moving cylinder 205 moves into the first through hole 201a, the moving cylinder 205 will push the inclined surface 204a, which in turn will cause the guide block 204 to push the slider 203.

[0052] Furthermore, the movable joint 202 is provided with a strip groove 202g communicating with the annular groove 202f on the outside, and the rotating ring 206 is provided with a second spiral groove 206b on the outer periphery, the spiral direction of the second spiral groove 206b being opposite to the spiral direction of the first spiral groove 206a.

[0053] The movable joint 202 is fitted with a separation ring 208 on its outside. The inner side of the separation ring 208 is provided with a protrusion 208a. The protrusion 208a passes through the strip groove 202g and is embedded in the second spiral groove 206b. The moving direction of the separation ring 208 is opposite to the moving direction of the moving cylinder 205. Therefore, when it is necessary to operate the fixed joint 201 and the movable joint 202 to separate them, it is only necessary to operate the separation ring 208 to move it away from the fixed joint 201. This action also conforms to the movement trajectory of the movable joint 202 separation and is not prone to error. At this time, since the rotation direction of the second spiral groove 206b is opposite to the rotation direction of the first spiral groove 206a, the moving cylinder 205 moves axially to push the inclined surface 204a, thereby separating the two.

[0054] In this embodiment, the tank body is connected to the exhaust manifold 300 through the connecting unit 200. The connection is convenient. When in use, the fixed connector 201 and the movable connector 202 can be directly connected. When separating, the fixed connector 201 and the movable connector 202 are separated by moving the separating ring 208 and after a series of transmissions.

[0055] Example 3

[0056] Reference Figure 7 This is the third embodiment of the present invention, which is based on the previous embodiment but differs from it in that the device is applied to a system for suppressing the volatilization of extracted organic matter and acid mist. The system includes a bottom storage tank area, an upper mixing chamber, a clarification chamber, and a multi-chamber oil separator.

[0057] Among them, a gas connection exhaust pipe is set at the top of the bottom tank area of ​​the extraction, the tanks in the bottom tank area of ​​the extraction are set as closed tanks, the top is opened with a gas flow port, and the exhaust pipe is connected to the gas flow flange port at the top of each tank through the connection unit 200. The gas pipe interface is connected to the extraction tail gas alkaline spray tower, and the required liquid in the tank is pumped in from outside the system through the interface 105.

[0058] In the bottom extraction tank area, a pump 103 delivers liquid to the mixing tank interface 402. The mixing tank interface 402 connects to the mixing zone of the mixing tank via a quick-connect interface. The mixed liquid is then connected to the clarification chamber interface 501 via interface 401. Interfaces 401 and 501 are overflow interfaces, allowing both gas and liquid to pass through smoothly. The oil-water mixture separates into layers within the mixing tank. The aqueous phase interface 502 connects to the next-level mixing tank interface 403 or to the multi-chamber oil separator inlet interface 601. After further oil-water separation in the multi-chamber oil separator, the aqueous phase flows out through interface 602 into the lower storage tank area, connecting to the storage tank interface 106 to form a closed-loop connection.

[0059] The upper mixing chamber of the extraction process is sealed by a stirring device equipped with a water-sealed tank cover. Figure 7 The water seals of each mixing chamber are connected by connecting short pipes, which can maintain the water level in the water seal tank. After the water in the water seal tank evaporates naturally, water can be quickly replenished to maintain the airtight reliability of the gas in the system.

[0060] The clarification chamber is sealed with a water seal cover plate with a ring corridor. The ring corridor facilitates sludge removal and cleaning of the clarification chamber, as well as inspection and management of the clarification tank surface. The ring corridor divides the water seal area into two parts, and each part has an observation cover plate with a water seal tank on its outlet 502 to facilitate sampling and adjustment of the extraction oil phase interface. The water seals of each clarification chamber are connected by a connecting short pipe 503, which can maintain the water level in the water seal tank. After the water in the water seal tank evaporates naturally, water can be quickly replenished to maintain the airtight reliability of the gas in the system.

[0061] The multi-chamber oil separator is connected to the clarifier outlet 502 via a U-shaped connection 601. The U-shaped connection connects the gas section of the clarifier to the multi-chamber oil separator. The liquid is allowed to flow into the multi-chamber oil separator by gravity through the height difference. The liquid that has undergone deep oil separation flows into the storage tank interface 106 via interface 602. Both gas and liquid can flow. The surface of the multi-chamber oil separator is sealed by an annular moisture tank with a corridor.

[0062] Exhaust fans and air inlets are evenly distributed at each water seal sampling point and adjustment point to absorb volatile organic compounds and acid mist that diffuse into the environment during sampling and adjustment. The environmental exhaust gas is discharged in compliance with standards after passing through the fan, two-stage alkaline spraying, and two-stage activated carbon adsorption.

[0063] Specifically, this is achieved through the following process steps:

[0064] The gas and liquid are connected to the storage tank, mixing chamber, clarification chamber and multi-chamber oil separator through gas and liquid connecting pipes. The gas part of each storage tank is connected through the exhaust main pipe and is connected to the atmosphere through the spray tower.

[0065] The storage tank is a closed storage tank with a gas flow flange on the top. The mixing chamber is a stirring tank with a water ring seal. The clarification chamber and multi-chamber oil separator are equipped with annular corridors with water seal trough covers. The oil phase and water phase outlets of the clarification chamber are equipped with observation covers with water seal troughs.

[0066] The mixing chamber and the water seal tank are connected by pipes, the clarification chamber and the clarification chamber are connected by pipes, and the multi-chamber oil separator and the water seal tank are connected by pipes, which facilitates the control of the water seal liquid level.

[0067] An environmental ventilation system is installed to collect and sample any small amount of pollutants that escape during the process, and the waste gas is treated by alkaline spraying and activated carbon adsorption.

[0068] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0069] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0070] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A storage tank used in a process for suppressing extraction volatilization, characterized in that: include, The tank (100) has a flow port (101) at the top. The connecting unit (200) includes a fixed connector (201) connected to the flow port (101) and a movable connector (202) detachably connected to the fixed connector (201). The fixed joint (201) is provided with a through first hole (201a); the movable joint (202) is provided with a through second hole (202a). The exhaust manifold (300) is connected to the exhaust manifold (300) via a pipe; The fixed joint (201) is provided with a tapered surface (201b) at the end where it connects to the movable joint (202). The fixed joint (201) is provided with an annular groove (201c) on its outer periphery. The second through hole (202a) is provided with a circular groove (202b) at the end where it connects to the fixed joint (201). A guide block (202c) is provided inside the circular groove (202b). The fixed joint (201) is provided with an axial guide groove (201d) on its outer periphery. One end of the fixed connector (201) is embedded in the circular groove (202b) and connected to the movable connector (202); The inner side of the circular groove (202b) is provided with a radial groove (202d), and a slider (203) is provided in the groove (202d). A first spring (203a) is provided between the slider (203) and the bottom of the groove (202d); the two ends of the first spring (203a) are fixedly connected to the end of the slider (203) and the bottom of the groove (202d), respectively. The first through hole (201a) is provided with a through groove (201e) that extends through to the annular groove (201c). A guide block (204) is provided in the through groove (201e). The guide block (204) has a bevel (204a) at one end near the first through hole (201a). The radial length of the inclined surface (204a) is consistent with the depth of the annular groove (201c), and the end face of the guide block (204) located in the annular groove (201c) is an arc surface; The through groove (201e) is provided with a limiting groove (201f) on its side, and the guide block (204) is provided with a limiting block (204b) embedded in the limiting groove (201f) on its side. A second spring (204c) is provided between the limiting block (204b) and the end face of the limiting groove (201f) away from the first through hole (201a). A movable cylinder (205) is provided inside the second through hole (202a), and an axially extending long groove (202e) is provided inside the second through hole (202a). A limiting pin (205a) is provided on the outer periphery of the movable cylinder (205), and the limiting pin (205a) is embedded in the long groove (202e). The movable joint (202) has an annular groove (202f) that intersects with the long groove (202e). A rotating ring (206) is provided inside the annular groove (202f). A first spiral groove (206a) is provided on the inner side of the rotating ring (206). The limiting pin (205a) is embedded in the first spiral groove (206a). A third spring (207) is provided between the limiting pin (205a) and the end face of the annular groove (202f) near the circular groove (202b). The movable joint (202) is provided with a strip groove (202g) that communicates with the annular groove (202f) on the outside, and the rotating ring (206) is provided with a second spiral groove (206b) on the outer periphery, the spiral direction of the second spiral groove (206b) being opposite to the spiral direction of the first spiral groove (206a); The movable joint (202) is fitted with a separation ring (208) on the outside. The separation ring (208) has a protrusion (208a) on its inner side. The protrusion (208a) passes through the strip groove (202g) and is embedded in the second spiral groove (206b). The moving direction of the separation ring (208) is opposite to the moving direction of the moving cylinder (205).

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