Locking mechanism for rotary locking ring

Abstract

The invention discloses a rotary locking ring locking mechanism which comprises the components of a base which is provided with a testing cavity and is provided with a medium input pipe and a medium output pipe which are communicated with the testing cavity; the sealing part is supported on the upper side of the base, the sealing part is provided with a testing opening and can be arranged on the to-be-tested workpiece in a sleeving manner through the testing opening, and the sealing part is used for sealing the upper part of the testing cavity; the locking part is rotationally connected to the base, a taking and placing opening is formed in the position, on the upper side of the sealing part, of the locking part, the locking part at least has a locking state and an unlocking state in the rotating process, when the locking part is in the locking state, the locking part can exert downward acting force on the sealing part so as to press the sealing part on the base, and when the locking part is in the unlocking state, the locking part can exert downward acting force on the sealing part so as to press the sealing part on the base. The pick-and-place opening is vertically aligned with the sealing part; and the power mechanism is in transmission connection with the locking part and is used for driving the locking part to rotate, so that the locking part is switched between the locking state and the unlocking state. The device is high in automation degree, and the power mechanism is not directly stressed and is not easy to damage.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic valve test auxiliary equipment, and in particular to a rotary locking ring locking mechanism. Background Art

[0002] In actual work, there are many working conditions that require high-pressure sealing, such as when testing the relationship between the change curves of PQ / PI, etc. of products (such as automobile solenoid valves, shock absorbers, etc.) in hydraulic systems, or when testing the relationship between the change curves of PQ / PI, etc. of products (such as heat pumps, electronic expansion valves, etc. on automobiles) in high-pressure gas systems, it is necessary to frequently and quickly lock and seal the products for subsequent testing; but in the prior art, for the above working conditions, most of them adopt mechanical clamping methods, such as: according to the size of the reaction force, 1 oil cylinder clamping, 2 cylinder clamping, 3 gas-liquid booster cylinder clamping, 4 motor screw clamping, 5 thread locking, etc. are adopted. The above methods can all achieve the requirements of locking and sealing, but the power mechanisms in methods 1 / 2 / 3 / 4 need to withstand large reaction forces, and the parts are easily damaged; and method 5 can only be locked and loosened manually, which is inefficient and labor-intensive for workers. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a rotary locking ring locking mechanism, which has a high degree of automation and a power mechanism that is not directly subjected to force and is not easily damaged.

[0004] The rotary locking ring locking mechanism according to an embodiment of the present invention comprises:

[0005] A base having a vertically distributed test cavity, wherein the test cavity is used for inserting a workpiece to be tested, and the base is provided with a medium input pipe and a medium output pipe connected to the test cavity;

[0006] A sealing part, supported on the upper side of the base, the sealing part is provided with a test port and can be sleeved on the workpiece to be tested through the test port, and the sealing part is used to seal the upper part of the test cavity;

[0007] A locking part, rotatably connected to the base and with a rotation axis vertically distributed, the locking part is provided with a take-in and put-out opening on the upper side of the sealing part for the sealing part to pass vertically, the locking part has at least a locked state and an unlocked state during rotation, when the locking part is in the locked state, the locking part can apply a downward force to the sealing part to press the sealing part onto the base, when the locking part is in the unlocked state, the take-in and put-out opening is vertically aligned with the sealing part;

[0008] The power mechanism is transmission-connected with the locking part and is used to drive the locking part to rotate so as to realize the switching of the locking part between the locking state and the unlocking state.

[0009] The rotary locking ring locking mechanism according to the embodiment of the present invention has at least the following beneficial effects:

[0010] When in use, first drive the locking part to rotate to the unlocked state through the power mechanism, then put the sealing part on the automobile solenoid valve, and then downwardly pass the sealing part through the access port to support it on the base, and at the same time, the automobile solenoid valve is partially inserted into the test cavity, and then the locking part is driven to rotate to the locked state through the power mechanism, and a downward force is applied to the sealing part to press the sealing part against the base, so that the sealing part keeps sealing the upper part of the test cavity to ensure the high-pressure sealing in the test cavity, and then the medium is input into the test cavity through the medium input pipe, so that the medium enters the interior of the automobile solenoid valve through the medium inlet, and then passes through the medium outlet of the automobile solenoid valve. The medium flows out of the test chamber through the medium output pipe, and the opening of the automobile solenoid valve is controlled by controlling the current. The flow rate through the automobile solenoid valve will also be different. In this way, the automobile solenoid valve can be tested. During the test, the upward reaction force of the medium will be transmitted to the locking part through the sealing part. Since the locking part is rotatably connected to the base, the reaction force of the medium acts on the locking part, and the power mechanism will not be directly subjected to force, and the power mechanism is not easily damaged. After the test, the locking part is driven by the power mechanism to rotate to the unlocked state, so that the sealing part is vertically aligned with the take-and-release port, and then the sealing part and the workpiece to be tested can be taken out upward, and the operation is very convenient.

[0011] According to some embodiments of the present invention, a butt contact surface is provided on the upper side of the sealing portion, and the butt contact surface is inclined in the vertical direction. A butt contact portion is provided on the side of the locking portion facing the butt contact surface, and the butt contact portion is used to butt contact with the butt contact surface during the process of the locking portion rotating from the unlocked state to the locked state, so as to press the sealing portion downward onto the base.

[0012] According to some embodiments of the present invention, a plurality of the abutting surfaces are evenly spaced apart along the circumference of the test port, and the abutting portions are disposed in one-to-one correspondence with the abutting surfaces.

[0013] According to some embodiments of the present invention, the abutting portion includes a roller rotatably disposed on the locking portion, a rotation axis of the roller is perpendicular to the rotation axis of the locking portion, and the roller is used to abut the abutting surface.

[0014] According to some embodiments of the present invention, the base is provided with a plurality of vertically distributed positioning protrusions, and the sealing portion is provided with a plurality of positioning recesses, and the positioning recesses are used to cooperate with the positioning protrusions to limit the rotation of the sealing portion relative to the base.

[0015] According to some embodiments of the present invention, a positioning pin is vertically provided on the base, and the positioning protrusion is formed by the positioning pin.

[0016] According to some embodiments of the present invention, a first sealing surface is horizontally provided at the upper end of the base on the peripheral side of the test cavity, a second sealing surface is horizontally provided on the side of the sealing portion facing the first sealing surface, and a first sealing ring is provided between the first sealing surface and the second sealing surface.

[0017] According to some embodiments of the present invention, a second sealing ring is disposed on the inner wall of the test port, and the second sealing ring is used to abut against the outer peripheral wall of the workpiece to be tested.

[0018] According to some embodiments of the present invention, a positioning sleeve is provided at the inner bottom of the test cavity, the outer peripheral wall of the positioning sleeve abuts against the inner peripheral wall of the test cavity, and the positioning sleeve is used to connect to the bottom end of the workpiece to be tested to horizontally position the workpiece to be tested.

[0019] According to some embodiments of the present invention, the locking portion is rotatably connected to the base via a thrust ball bearing.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 It is a structural schematic diagram of an embodiment of a rotary locking ring locking mechanism of an embodiment of the present invention;

[0023] Figure 2 is a schematic structural diagram of a locking portion of an embodiment of the present invention when it is in an unlocked state;

[0024] Figure 3 is a schematic diagram of the installation structure of the base, the locking part and the sealing part of an embodiment of the present invention;

[0025] Figure 4 is an exploded schematic diagram of the installation structure of the base, the locking portion and the sealing portion of an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of the internal structure of a base according to an embodiment of the present invention;

[0027] Figure 6 is a schematic structural diagram of a locking portion according to an embodiment of the present invention;

[0028] Figure 7 is a schematic structural diagram of a sealing portion according to an embodiment of the present invention;

[0029] Figure 8 It is a structural schematic diagram of another embodiment of the rotary locking ring locking mechanism of the embodiment of the present invention.

[0030] Figure Number:

[0031] Base 100, test cavity 101, first sealing surface 102, medium input pipe 110, medium output pipe 120, positioning pin 130, positioning sleeve 140, base plate 150, positioning seat 160, flange 161, third sealing ring 170, fourth sealing ring 180, bottom plate 190;

[0032] A workpiece to be measured 200, a medium inlet 201, a medium outlet 202, and a step surface 203;

[0033] Sealing portion 300, test port 301, abutting surface 302, positioning recess 303, second sealing surface 304, second sealing ring 305;

[0034] The locking part 400, the access opening 401, the roller 410, the locking ring 420, the limiting surface 421, the bearing fixing seat 430, and the sinking groove 431;

[0035] Power mechanism 500;

[0036] A first sealing ring 600;

[0037] Thrust ball bearing 700;

[0038] Photoelectric presence detection device 800. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0043] Reference Figures 1 to 4 As shown, a rotary locking ring locking mechanism according to an embodiment of the present invention includes: a base 100, a sealing portion 300, a locking portion 400, and a power mechanism 500.

[0044] A vertically distributed test cavity 101 is provided in the base 100, and the upper part of the test cavity 101 is opened for inserting a workpiece 200 to be tested. A medium input pipe 110 connected to the test cavity 101 is provided at the bottom of the base 100, and a medium output pipe 120 connected to the test cavity 101 is provided on the peripheral side of the base 100. In this embodiment, the workpiece 200 to be tested is an automobile solenoid valve, and the automobile solenoid valve has a medium inlet 201 and a medium outlet 202. When the automobile solenoid valve is inserted into the test cavity 101, the medium inlet 201 of the automobile solenoid valve is located at its bottom end, and the medium outlet 202 of the automobile solenoid valve is located on its peripheral side, and the medium inlet 201 and the medium outlet 202 of the automobile solenoid valve are both located in the test cavity 101.

[0045] The sealing part 300 is supported on the upper side of the base 100. The sealing part 300 is provided with a test port 301 and can be mounted on the workpiece 200 to be tested through the test port 301. The test port 301 matches the outer contour of the workpiece 200 to be tested, and the workpiece 200 to be tested can pass through the test port 301. The sealing part 300 is used to seal the upper part of the test cavity 101; obviously, the bottom of the test cavity 101 is also provided with a corresponding sealing structure to seal the bottom of the test cavity 101 to maintain the closedness of the test cavity 101.

[0046] The locking portion 400 is rotatably connected to the base 100, and the rotation axis of the locking portion 400 is vertically distributed. The locking portion 400 is provided with a take-in and put-out opening 401 on the upper side of the sealing portion 300 for the sealing portion 300 to pass vertically, that is, the take-in and put-out opening 401 is adapted to the outer contour of the sealing portion 300. The locking portion 400 has at least a locked state and an unlocked state during rotation. When the locking portion 400 is in the locked state, the locking portion 400 can apply a downward force to the sealing portion 300 to press the sealing portion 300 onto the base 100, so that the sealing portion 300 maintains a state of sealing the upper part of the test cavity 101. When the locking portion 400 is in the unlocked state, the take-in and put-out opening 401 is vertically aligned with the sealing portion 300. At this time, the sealing portion 300 can pass through the take-in and put-out opening 401 vertically, which is convenient for taking and putting the sealing portion 300.

[0047] The power mechanism 500 is in transmission connection with the locking part 400, and the power mechanism 500 is used to drive the locking part 400 to rotate, so as to switch the locking part 400 between the locked state and the unlocked state. It is understandable that the power mechanism 500 can be a cylinder, an oil cylinder or a motor. When a cylinder or an oil cylinder is used, Figure 1 As shown, the cylinder or oil cylinder is horizontally extended, and its extended end is hinged on the locking part 400 and the hinge position is set away from the rotation axis of the locking part 400, so as to drive the locking part 400 to rotate through the extension movement. When the power mechanism 500 adopts a motor, as shown in Figure 8 As shown, the motor can be connected to the locking portion 400 via a belt mechanism or a gear mechanism to drive the locking portion 400 to rotate.

[0048] The rotary locking ring locking mechanism of the embodiment of the present invention is used. First, the locking part 400 is driven to rotate to the unlocked state by the power mechanism 500, and then the sealing part 300 is sleeved on the automobile solenoid valve. Then, the sealing part 300 is downwardly passed through the access port 401 to be supported on the base 100, and the automobile solenoid valve is partially inserted into the test cavity 101. Then, the locking part 400 is driven to rotate to the locked state by the power mechanism 500, and a downward force is applied to the sealing part 300 to press the sealing part 300 against the base 100, so that the sealing part 300 maintains a state of sealing the upper part of the test cavity 101 to ensure the high-pressure sealing in the test cavity 101. Then, the medium is input into the test cavity 101 through the medium input pipe 110, so that the medium enters the interior of the test cavity 101 through the medium inlet 201 of the automobile solenoid valve, and then the medium is input into the test cavity 101 through the medium inlet 201 of the automobile solenoid valve. The medium outlet 202 of the solenoid valve flows out of the test chamber 101 through the medium output pipe 120. The opening of the automobile solenoid valve is controlled by controlling the current, and the flow rate through the automobile solenoid valve will also be different. In this way, the automobile solenoid valve can be tested. During the test, the upward reaction force of the medium will be transmitted to the locking part 400 through the sealing part 300. Since the locking part 400 is rotatably connected to the base 100, the reaction force of the medium acts on the locking part 400, and the power mechanism 500 will not be directly subjected to force, and the power mechanism 500 is not easily damaged. After the test, the locking part 400 is driven by the power mechanism 500 to rotate to the unlocked state, so that the sealing part 300 is vertically aligned with the take-and-release port 401, and then the sealing part 300 and the workpiece 200 to be tested can be taken out upward, with a high degree of automation and very convenient operation.

[0049] Reference Figure 1 and Figure 3As shown, in some embodiments of the present invention, the upper end of the base 100 is provided with a first sealing surface 102 horizontally on the peripheral side of the test cavity 101, the sealing part 300 is provided with a second sealing surface 304 horizontally on the side facing the first sealing surface 102, and a first sealing ring 600 is provided between the first sealing surface 102 and the second sealing surface 304. In addition, a second sealing ring 305 is provided on the inner wall of the test port 301, and the second sealing ring 305 is used to abut against the outer peripheral wall of the workpiece 200 to be tested. The first sealing ring 600 and the second sealing ring 305 seal the gaps between the test cavity 101, the sealing part 300, and the product to be tested, thereby sealing the upper part of the test cavity 101; wherein, when the locking part 400 is in the locking state, the locking part 400 can exert a downward force on the first sealing ring 600, thereby pressing the first sealing ring 600 to ensure the high pressure stability in the test cavity 101. It can be imagined that both the first sealing ring 600 and the second sealing ring 305 can be O-rings.

[0050] Understandably, referring to Figure 1 As shown, in order to ensure safety and confirm the working status, a photoelectric in-position detection device 800 is arranged above the base 100. The photoelectric in-position detection device 800 is used to detect whether the workpiece 200 to be tested is in place. Only when the workpiece 200 to be tested is in place, the test work is performed. The photoelectric in-position detection device 800 is a common technical means, so its structural principle is not specifically described here.

[0051] Reference Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, in some embodiments of the present invention, the upper side of the sealing part 300 is provided with an abutting surface 302, and the abutting surface 302 is inclined in the vertical direction. The locking part 400 is provided with an abutting portion on one side facing the abutting surface 302, and the abutting portion can move synchronously with the locking part 400. The abutting portion is used to abut the abutting surface 302 during the process of the locking part 400 rotating from the unlocked state to the locked state, so as to press the sealing part 300 downward on the base 100. The sealing part 300 is pressed by the cooperation of the abutting portion and the inclined abutting surface 302, and the structure is simple and practical. In a further embodiment, the abutting surface 302 spirally extends around the rotation axis of the locking part 400.

[0052] Reference Figure 1 and Figure 2 As shown, in some embodiments of the present invention, a plurality of abutting surfaces 302 are evenly spaced along the circumference of the test port 301, and the abutting portions and the abutting surfaces 302 are arranged one-to-one correspondingly, so that the sealing portion 300 can be subjected to balanced force and the structure is stable and reliable.

[0053] Reference Figures 1 to 3 as well as Figure 6As shown, in some embodiments of the present invention, the abutting portion includes a roller 410 rotatably disposed on the locking portion 400, the rotation axis of the roller 410 is perpendicular to the rotation axis of the locking portion 400, and the roller 410 is used to abut the abutting surface 302. In this way, when the locking portion 400 rotates, the roller 410 can roll along the abutting surface 302, thereby reducing the rotation resistance of the locking portion 400 and reducing the wear of the abutting surface 302. Specifically, the roller 410 is installed on the locking portion 400 through a pin.

[0054] Reference Figures 3 to 5 As shown, in some embodiments of the present invention, the base 100 is provided with a plurality of vertically distributed positioning protrusions, and the sealing part 300 is provided with a plurality of positioning recesses 303, the positioning protrusions correspond to the positioning recesses 303 one by one, and the positioning recesses 303 are used to cooperate with the positioning protrusions to limit the rotation of the sealing part 300 relative to the base 100, thereby preventing the locking part 400 from rotating while driving the sealing part 300 to rotate together. In some specific embodiments, the base 100 is vertically provided with a positioning pin 130, and the positioning protrusion is formed by the positioning pin 130, and the structure is simple and practical; wherein, the positioning pin 130 adopts a threaded cylindrical pin, which is threadedly installed on the base 100, and is easy to disassemble and assemble, and the positioning recess 303 is a cylindrical hole, and the bottom end of the positioning recess 303 is provided with a chamfer to facilitate the insertion of the positioning pin 130. Further, the sealing part 300 is partially embedded in the test cavity 101 to improve the structural stability.

[0055] Reference Figures 3 to 5 As shown, in some embodiments of the present invention, a positioning sleeve 140 is provided at the inner bottom of the test cavity 101, and the outer peripheral wall of the positioning sleeve 140 abuts against the inner peripheral wall of the test cavity 101. The positioning sleeve 140 is used to connect with the bottom end of the workpiece 200 to horizontally position the workpiece 200 to prevent the workpiece 200 to be tested from deflecting in the vertical direction after being inserted into the test cavity 101, thereby affecting the test results. Specifically, the bottom end of the workpiece 200 to be measured (in this embodiment, an automobile solenoid valve) is a medium inlet 201, the bottom end of the workpiece 200 to be measured is provided with an external thread, the positioning sleeve 140 is provided with an internal thread to be threadedly connected to the workpiece 200 to be measured, and the medium output pipe 120 of the base 100 is located at the lower side of the positioning sleeve 140 and is connected to the inner cavity of the positioning sleeve 140; further, the peripheral side of the workpiece 200 to be measured has an upward step surface 203, and the sealing part 300 is sleeved on the workpiece 200 to be measured and is located on the upper side of the step surface 203. During testing, the upward displacement of the workpiece 200 to be measured can be limited by the cooperation between the sealing part 300 and the step surface 203.

[0056] Reference Figure 1 , Figures 3 to 6As shown, in some embodiments of the present invention, the locking portion 400 is rotatably connected to the base 100 via a thrust ball bearing 700 , and the thrust ball bearing 700 can withstand a large axial force, thereby ensuring the reliability of the locking portion 400 being rotatably connected to the base 100 . Specifically, in the present embodiment, the base 100 includes a substrate 150 and a positioning seat 160 fixed to the upper surface of the substrate 150, the positioning seat 160 is cylindrical, a third sealing ring 170 is provided between the lower end surface of the positioning seat 160 and the upper surface of the substrate 150, the interior of the positioning seat 160 is axially penetrated and cooperates with the substrate 150 to form a test chamber 101, the medium input pipe 110 is connected to the substrate 150, the positioning sleeve 140 is located on the inner side of the positioning seat 160, a fourth sealing ring 180 is provided between the outer peripheral wall of the positioning sleeve 140 and the inner peripheral wall of the positioning seat 160, the bottom end of the positioning sleeve 140 abuts against the upper surface of the substrate 150, the top end of the positioning seat 160 is provided with a flange 161 protruding outward along its radial direction, and the first sealing surface 102 is formed on the upper surface of the flange 161; the locking portion 400 includes The locking ring 420 and the bearing fixing seat 430, the locking ring 420 is sleeved on the upper side of the base 100, the access port 401 is formed at the top of the locking ring 420, the roller 410 is installed on the top of the locking ring 420, the inner side of the locking ring 420 is provided with a downward limiting surface 421, the limiting surface 421 abuts against the upper surface of the flange 161, the bearing fixing seat 430 is fixed to the bottom of the locking ring 420, the bearing fixing seat 430 is also sleeved on the positioning seat 160, the upper surface of the bearing fixing seat 430 is provided with a sink groove 431, the thrust ball bearing 700 is sleeved on the positioning seat 160, the upper race of the thrust ball bearing 700 abuts against the lower surface of the flange 161, and the lower race of the thrust ball bearing 700 is embedded in the sink groove 431. Through the above-mentioned structural arrangement, the locking part 400 and the base 100 can be rotatably connected. When the thrust ball bearing 700 needs to be disassembled, the positioning seat 160 is first separated from the base plate 150, and then the bearing fixing seat 430 is removed from the locking ring 420, and then the thrust ball bearing 700 is taken out downward along the positioning seat 160, and the locking ring 420 can be pulled out upward from the upper side of the positioning seat 160, which is very convenient for disassembly. In this embodiment, the base 100 is installed on the bottom plate 190, and the bottom plate 190 is used to connect with the structural support.

[0057] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A rotary locking ring locking mechanism, characterized in that: include: A base (100) having a vertically distributed test cavity (101), wherein the test cavity (101) is used for inserting a workpiece (200) to be tested, and the base (100) is provided with a medium input pipe (110) and a medium output pipe (120) communicating with the test cavity (101); A sealing part (300) supported on the upper side of the base (100), the sealing part (300) being provided with a test port (301) and being able to be sleeved on the workpiece (200) to be tested through the test port (301), the sealing part (300) being used to seal the upper part of the test cavity (101); A locking portion (400) is rotatably connected to the base (100) and the rotation axis is vertically distributed. The locking portion (400) is provided with a take-in and put-out opening (401) on the upper side of the sealing portion (300) for the sealing portion (300) to pass vertically. The locking portion (400) has at least a locked state and an unlocked state during rotation. When the locking portion (400) is in the locked state, the locking portion (400) can apply a downward force to the sealing portion (300) to press the sealing portion (300) onto the base (100). When the locking portion (400) is in the unlocked state, the take-in and put-out opening (401) is vertically aligned with the sealing portion (300); The power mechanism (500) is transmission-connected to the locking portion (400) and is used to drive the locking portion (400) to rotate, so as to achieve switching of the locking portion (400) between the locking state and the unlocking state.

2. The rotary locking ring locking mechanism according to claim 1, characterized in that: The sealing portion (300) is provided with an abutment surface (302) on its upper side, and the abutment surface (302) is inclined in a vertical direction. The locking portion (400) is provided with an abutment portion on one side facing the abutment surface (302), and the abutment portion is used to abut against the abutment surface (302) when the locking portion (400) rotates from the unlocked state to the locked state, so as to press the sealing portion (300) downward onto the base (100).

3. The rotary locking ring locking mechanism according to claim 2, characterized in that: A plurality of the abutting surfaces (302) are evenly spaced along the circumference of the test port (301), and the abutting portions are arranged in one-to-one correspondence with the abutting surfaces (302).

4. The rotary locking ring locking mechanism according to claim 2, characterized in that: The abutting portion comprises a roller (410) rotatably arranged on the locking portion (400), the rotation axis of the roller (410) being perpendicular to the rotation axis of the locking portion (400), and the roller (410) being used for abutting the abutting surface (302).

5. The rotary locking ring locking mechanism according to claim 4, characterized in that: The base (100) is provided with a plurality of vertically distributed positioning protrusions, and the sealing portion (300) is provided with a plurality of positioning recesses (303), wherein the positioning recesses (303) are used to cooperate with the positioning protrusions to limit the rotation of the sealing portion (300) relative to the base (100).

6. The rotary locking ring locking mechanism according to claim 5, characterized in that: A positioning pin (130) is vertically arranged on the base (100), and the positioning protrusion is formed by the positioning pin (130).

7. The rotary locking ring locking mechanism according to claim 1, characterized in that: A first sealing surface (102) is horizontally provided at the upper end of the base (100) on the peripheral side of the test cavity (101), a second sealing surface (304) is horizontally provided on the side of the sealing portion (300) facing the first sealing surface (102), and a first sealing ring (600) is provided between the first sealing surface (102) and the second sealing surface (304).

8. The rotary locking ring locking mechanism according to claim 1, characterized in that: A second sealing ring (305) is provided on the inner wall of the test port (301), and the second sealing ring (305) is used to abut against the outer peripheral wall of the workpiece (200) to be tested.

9. The rotary locking ring locking mechanism according to claim 1, characterized in that: A positioning sleeve (140) is provided at the inner bottom of the test cavity (101), the outer peripheral wall of the positioning sleeve (140) abuts against the inner peripheral wall of the test cavity (101), and the positioning sleeve (140) is used to connect with the bottom end of the workpiece (200) to be tested so as to horizontally position the workpiece (200) to be tested.

10. The rotary locking ring locking mechanism according to claim 1, characterized in that: The locking portion (400) is rotatably connected to the base (100) via a thrust ball bearing (700).

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