Performance parameter testing device capable of simulating the working conditions of the center swivel joint assembly

Abstract

The present invention discloses a performance parameter testing device capable of simulating the working condition of a central rotary joint assembly, comprising a protective shell and a lifting mechanism, wherein a second limit frame is connected to the inside of the protective shell, and a first limit frame is sleeved on one end of the second limit frame; the lifting mechanism comprises a servo motor and a slider, wherein a first reciprocating screw is connected to the inner wall of the slider, a second rotating rod is rotatably connected to the bottom end of the first reciprocating screw, a movable block is arranged at the connection position between the second rotating rod and the first reciprocating screw, and a second reciprocating screw is arranged inside the second rotating rod. The present invention can make the first limit frame and the second limit frame limit the upper and lower parts of the rotary joint respectively by arranging a lifting mechanism and a transmission mechanism, and since the inner wall of the annular groove where the lower half of the first limit frame and the second limit frame contact the rotary joint is rotatably connected with a roller, a simulated operating condition in which the upper and lower parts of the rotary joint complete relative rotation is realized, so as to obtain a true and reliable test result.

Description

Technical Field

[0001] The invention relates to the field of center swivel joint testing, and in particular to a performance parameter testing device capable of simulating the working condition of a center swivel joint assembly. Background Art

[0002] The center swivel joint assembly is usually used for pipeline installation in hydraulic and pneumatic machinery with swivel motion. It is connected between the hydraulic and pneumatic pipelines of relatively fixed parts and rotating parts. During swivel motion, it can avoid the situation where the pipelines are easily entangled when using hoses. At the same time, it can also enable the upper and lower parts of the hydraulic system pipeline to complete relative rotation.

[0003] The center swivel joint assembly usually needs to be tested after processing. The current main detection method is to complete the oil leakage detection in a static environment. However, for other parameter indicators of the center swivel joint assembly, such as failure, internal leakage, and the service life of the seal, it is impossible to test the above parameter indicators in a simulated working environment, so it is impossible to obtain real and reliable test results. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a performance parameter testing device that can simulate the working conditions of a center swivel joint assembly.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a performance parameter testing device capable of simulating the working condition of a central swivel joint assembly, comprising a protective shell, a swivel joint is placed inside the protective shell, a second limit frame for limiting the swivel joint is slidably connected to the inside of the protective shell through a slide groove, one end of the second limit frame is slidably sleeved with a first limit frame for limiting the swivel joint through a connecting rod; and also comprising a lifting mechanism, the lifting mechanism comprising a servo motor installed inside the protective shell for providing a driving force, the lifting mechanism also comprising a slider connected to one end of the second limit frame for transmitting up and down thrust to the first limit frame, the inner wall of the slider is connected to a first reciprocating screw for transmitting torque, the bottom end of the first reciprocating screw is rotatably connected to a second rotating rod for transmitting torque, a movable block for transmitting torque to the first reciprocating screw is arranged at the connection position between the second rotating rod and the first reciprocating screw, and a second reciprocating screw is arranged inside the second rotating rod.

[0006] As a further solution of the present invention: the lifting mechanism also includes a first rotating rod for transmitting torque connected to the output end of the servo motor, the outer wall of the first rotating rod is sleeved with a chain for transmitting transmission force, the inner side of the other end of the chain is engaged with the outer wall of the second rotating rod, the top of the movable block is connected to a telescopic block for docking with the first reciprocating screw rod, the bottom end of the telescopic block is connected to a positioning block for transmitting thrust to the telescopic block, the bottom end of the positioning block is located inside the movable block and is connected to a spring for providing elastic force to the positioning block, the interior of the protective shell is located on the lower side of the first limit frame, and is connected to a ramp block for providing thrust to the first limit frame.

[0007] As a further solution of the present invention: the transmission mechanism also includes a torsion spring connected to the top of the first spur gear, a rotating base for transmitting rotational force to the rotating joint is also installed inside the protective shell, a test component for detecting the rotating joint is also installed inside the protective shell, and a reset spring is arranged at the connection position between the first limit frame and the second limit frame.

[0008] As a further solution of the present invention: a movable crescent pin is provided at the connection position between the movable block and the second reciprocating screw rod, the bottom ends of the second reciprocating screw rod and the second rotating rod are connected to the base, the base is rotatably connected to the second rotating rod, and the base is fixedly connected to the second reciprocating wire.

[0009] As a further solution of the present invention: the inner walls of the second rotating rod and the first reciprocating screw rod are provided with a first groove for matching the vertical movement trajectory of the movable block and the telescopic block.

[0010] As a further solution of the present invention: a second groove is provided inside the movable block for matching the vertical movement tracks of the telescopic block and the positioning block, and the outer wall of the positioning block is in an "L"-shaped structure.

[0011] As a further solution of the present invention: the outer wall of the telescopic block is in a "convex" shape, and the top outer wall of the upper half of the telescopic block is consistent with the top outer wall of the movable block.

[0012] As a further solution of the present invention: a movable crescent pin is provided at the connection position between the slider and the first reciprocating screw rod, the inner wall of the protective shell is provided with a first positioning groove for matching the vertical movement trajectory of the slider, the outer wall of the protective shell is located at the bottom end of the second rotating rod with a fixed seat fixed, the bottom end of the second rotating rod is rotatably connected to the fixed seat through a bearing, and the second reciprocating screw rod is fixedly connected to the fixed seat.

[0013] As a further solution of the present invention: the inner cavities of the first limit frame and the second limit frame are provided with annular grooves matching the outer wall of the rotary joint; the inner cavities of the annular grooves in the upper parts of the first limit frame and the second limit frame are connected to rubber pads for increasing friction at the contact positions with the rotary joint; the inner cavities of the top protrusions of the rotating base are consistent with the outer wall of the rotary joint; the servo motor is electrically connected to the PLC controller through a wire; the inner walls of the annular grooves in the lower parts of the first limit frame and the second limit frame that are in contact with the rotary joint are rotatably connected with rollers, and a rubber pad is provided at the contact position between the rotary joint and the rotating base.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] When the processed rotary joint needs to be tested for various performance parameters, the first limit frame and the second limit frame can limit the upper and lower parts of the rotary joint respectively through the provided lifting mechanism and transmission mechanism; first, the oil leakage detection is completed in a static environment; then, the parameters such as failure, internal leakage, and the service life of the seal are tested under simulated working conditions; since the inner wall of the annular groove of the lower part of the first limit frame and the second limit frame that contacts the rotary joint is connected to the rotation of the roller, starting the servo motor can drive the lower part of the rotary joint to rotate, while the upper part of the rotary joint is limited by the annular groove of the upper part of the first limit frame and the second limit frame, thereby realizing the simulated operating condition of the upper and lower parts of the rotary joint completing relative rotation, and under this simulated working condition, real and reliable test results can be obtained; after the test is completed, the first limit frame and the second limit frame can be moved out of the rotary joint, so as to quickly take out and install a new rotary joint for testing, which further improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the lifting mechanism of the present invention;

[0018] Figure 3 It is a schematic diagram of the transmission structure of the first rotating rod and the second rotating rod of the present invention;

[0019] Figure 4 is a cross-sectional view of the internal structure of the second rotating rod of the present invention;

[0020] Figure 5 It is a schematic diagram of the internal structure of the movable block of the present invention;

[0021] Figure 6 It is a structural cross-sectional view of the second limiting frame of the present invention.

[0022] In the figure: 1. protective shell; 2. test component; 3. rotating base; 4. swivel joint; 5. first limit frame; 6. second limit frame; 7. lifting mechanism; 701. servo motor; 702. first rotating rod; 703. chain; 704. second rotating rod; 705. first reciprocating screw rod; 706. slider; 707. movable block; 708. telescopic block; 709. positioning block; 710. spring; 711. second reciprocating screw rod; 712. inclined block; 8. fixed seat. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figures 1 to 6 In an embodiment of the present invention, a performance parameter testing device capable of simulating the working condition of a central swivel joint assembly includes a protective shell 1, a swivel joint 4 is placed inside the protective shell 1, a second limit frame 6 for limiting the swivel joint 4 is slidably connected to the inside of the protective shell 1 through a slide groove, and one end of the second limit frame 6 is slidably sleeved with a first limit frame 5 for limiting the swivel joint 4 through a connecting rod; and also includes a lifting mechanism 7, the lifting mechanism 7 includes a servo motor 701 installed inside the protective shell 1 for providing a driving force, and a ... The lifting mechanism 7 also includes a slider 706 connected to one end of the second limit frame 6 for transmitting up and down thrust to the first limit frame 5, the inner wall of the slider 706 is connected to the first reciprocating screw 705 for transmitting torque, the bottom end of the first reciprocating screw 705 is rotatably connected to the second rotating rod 704 for transmitting torque, a movable block 707 for transmitting torque to the first reciprocating screw 705 is arranged at the connection position between the second rotating rod 704 and the first reciprocating screw 705, and a second reciprocating screw 711 is arranged inside the second rotating rod 704.

[0025] In this embodiment: when using this device, the swivel joint 4 is placed above the rotating base 3 inside the protective shell 1, and the positioning is performed by the protruding portion at the top of the rotating base 3, and then the servo motor 701 is started. The operation of the servo motor 701 will drive the transmission component of the lifting mechanism 7 to work, so that the slider 706 moves downward along the first positioning groove of the protective shell 1 under the rotational force, and the movement of the slider 706 drives the first limit frame 5 and the second limit frame 6 to move downward synchronously until the bottom outer wall of the first limit frame 5 contacts the thrust component of the lifting mechanism 7. At this time, the first limit frame 5 and the second limit frame 6 will also move to the outer wall of the swivel joint 4, and the first limit frame 5 gradually approaches the second limit frame 6 under the inclined thrust of the thrust component, so that the first limit frame 5 and the second limit frame 6 are merged, then the annular grooves in the upper half of the first limit frame 5 and the second limit frame 6 will limit the upper half of the swivel joint 4, and the lower half of the first limit frame 5 and the second limit frame 6 Part of the annular groove will also contact the outer wall of the rotary joint 4, thereby completing the limit; at the same time, the operation of the servo motor 701 will drive the transmission parts of the lifting assembly to work, so that the second rotating rod 704 connected to the transmission parts rotates, and the rotation of the second rotating rod 704 will drive the movable block 707 stuck in its inner cavity to rotate synchronously. Since the movable block 707 is also stuck in the inner cavity of the first reciprocating screw rod 705, the first reciprocating screw rod 705 will also rotate synchronously, so that the slider 706 moves downward along the outer wall of the first reciprocating screw rod 705, and the inner wall of the movable block 707 will also move downward along the outer wall of the second reciprocating screw rod 711, until the movable block 707 is no longer in contact with the inner cavity of the first reciprocating screw rod 705, so that the first reciprocating screw rod 705 is no longer affected by the rotation of the movable block 707, then the first reciprocating screw rod 705 will no longer rotate, so that the slider 706 also stops moving, thereby achieving the purpose of simulating working condition operation of the rotary joint 4.

[0026] Please refer to Figure 2-6The lifting mechanism 7 also includes a first rotating rod 702 for transmitting torque connected to the output end of the servo motor 701, a chain 703 for transmitting transmission force is sleeved on the outer wall of the first rotating rod 702, and the inner side of the other end of the chain 703 is engaged with the outer wall of the second rotating rod 704. The top of the movable block 707 is connected to a telescopic block 708 for docking with the first reciprocating screw rod 705, and the bottom of the telescopic block 708 is connected to a positioning block 709 for transmitting thrust to the telescopic block 708. The bottom of the positioning block 709 is connected to the bottom of the positioning block 709. The end of the movable block 707 is connected to a spring 710 for providing elastic force to the positioning block 709. The interior of the protective shell 1 is located on the lower side of the first limit frame 5, and is connected to a ramp block 712 for providing thrust to the first limit frame 5. A rotating base 3 for transmitting rotational force to the rotary joint 4 is also installed inside the protective shell 1. A test component 2 for detecting the rotary joint 4 is also installed inside the protective shell 1. A reset spring is arranged at the connection position between the first limit frame 5 and the second limit frame 6.

[0027] In this embodiment: by placing the swivel joint 4 above the rotating base 3 inside the protective shell 1, positioning it through the protruding portion at the top of the rotating base 3, and then starting the servo motor 701, the servo motor 701 will drive the first rotating rod 702 and the chain 703 as the transmission component in the lifting mechanism 7 to work, and the chain 703 transmission will drive the second rotating rod 704, the movable block 707, and the first reciprocating screw rod 705 to rotate, so that the slider 706 moves downward along the first positioning groove of the protective shell 1 under the rotation force, and the movement of the slider 706 drives the first limit frame 5, the second limit frame 704, the second limit frame 705, and the first limit frame 706 to move downward along the first positioning groove of the protective shell 1. The two limit frames 6 move downward synchronously until the bottom outer wall of the first limit frame 5 contacts the inclined block 712 of the lifting mechanism 7 as a thrust component. At this time, the first limit frame 5 and the second limit frame 6 will also move to the outer wall of the rotary joint 4, and the first limit frame 5 will also gradually approach the second limit frame 6 under the inclined thrust of the inclined block 712, so that the first limit frame 5 and the second limit frame 6 are merged, then the annular grooves of the upper half of the first limit frame 5 and the second limit frame 6 will limit the upper half of the rotary joint 4, and the annular grooves of the lower half of the first limit frame 5 and the second limit frame 6 At the same time, the rotation of the second rotating rod 704 will drive the movable block 707 stuck in its inner cavity to rotate synchronously. Since a part of the movable block 707 is stuck in the inner cavity of the first reciprocating screw rod 705, the first reciprocating screw rod 705 will also rotate synchronously, so that the slider 706 moves downward along the outer wall of the first reciprocating screw rod 705, and the inner wall of the movable block 707 will also move downward along the outer wall of the second reciprocating screw rod 711, until the movable block 707 is no longer in contact with the inner cavity of the first reciprocating screw rod 705, so that the first reciprocating screw rod 70 5 is no longer affected by the rotation of the movable block 707, then the first reciprocating screw rod 705 will no longer rotate, so that the slider 706 also stops moving; because the inner wall of the annular groove of the lower part of the first limit frame 5 and the second limit frame 6 that contacts the swivel joint 4 is rotatably connected with the roller, the servo motor 701 continues to run and can only drive the lower part of the swivel joint 4 to rotate, and the upper part of the swivel joint 4 is limited by the annular groove of the upper part of the first limit frame 5 and the second limit frame 6, thereby realizing the simulated operation action of the upper and lower parts of the swivel joint 4 completing relative rotation.

[0028] Please refer to Figure 2-5, a movable crescent pin is provided at the connection position between the movable block 707 and the second reciprocating screw rod 711, the bottom ends of the second reciprocating screw rod 711 and the second rotating rod 704 are connected to the base, the base is rotatably connected to the second rotating rod 704, the base is fixedly connected to the second reciprocating screw rod 711, the inner walls of the second rotating rod 704 and the first reciprocating screw rod 705 are provided with a first groove for matching the vertical movement trajectory of the movable block 707 and the telescopic block 708, the interior of the movable block 707 is provided with a second groove for matching the vertical movement trajectory of the telescopic block 708 and the positioning block 709, the outer wall of the positioning block 709 is an "L"-shaped structure, the outer wall of the telescopic block 708 is a "convex"-shaped structure, the top outer wall of the upper half of the telescopic block 708 is consistent with the top outer wall of the movable block 707, the slider 706 is provided with a movable crescent pin at the connection position between the first reciprocating screw rod 705, and the inner wall of the protective shell 1 is provided with a A first positioning groove is provided to match the vertical movement trajectory of the slider 706, and a fixed seat 8 is fixed on the outer wall of the protective shell 1 at the bottom end of the second rotating rod 704. The bottom end of the second rotating rod 704 is rotatably connected to the fixed seat 8 through a bearing, and the second reciprocating screw 711 is fixedly connected to the fixed seat 8. The inner cavity of the first limit frame 5 and the second limit frame 6 is provided with an annular groove matching the outer wall of the rotary joint 4. The inner cavity of the annular groove of the upper half of the first limit frame 5 and the second limit frame 6 is connected to a rubber pad for increasing friction at the contact position with the rotary joint 4. The inner cavity of the top protrusion of the rotating base 3 is consistent with the outer wall of the rotary joint 4. The servo motor 701 is electrically connected to the PLC controller through a wire. The inner wall of the annular groove of the lower half of the first limit frame 5 and the second limit frame 6 that contacts the rotary joint 4 is rotatably connected with a roller, and a rubber pad is provided at the contact position between the rotary joint 4 and the rotating base 3.

[0029] In this embodiment: when the second rotating rod 704 rotates, the movable block 707 in its inner cavity can be driven to rotate synchronously, and the first reciprocating screw rod 705 will also rotate under the rotation of the movable block 707, and the movable block 707 will also move downward along the outer wall of the second reciprocating screw rod 711 under the rotation force, until the outer walls of the movable block 707 and the telescopic block 708 are separated from the inner cavity of the first reciprocating screw rod 705, then the first reciprocating screw rod 705 will no longer rotate, and the movable block 707 is still in the inner cavity of the second rotating rod 704, then the continued rotation of the second rotating rod 704 will continue to drive the movable block 707 to continue to rotate;

[0030] At this time, the movable block 707 will continue to move downward through the outer wall of the second reciprocating screw rod 711, and the continued rotation of the movable block 707 will also make the crescent pin sleeved on the outer wall of the second reciprocating screw rod 711 dock with another threaded groove, so that the movable block 707 moves upward. At this time, the telescopic block 708 at the top of the movable block 707 will contact the bottom end of the inner cavity of the first reciprocating screw rod 705, and the telescopic block 708 will be subjected to the downward pressure from the bottom end of the first reciprocating screw rod 705, so that the telescopic block 708 will drive the positioning block 709 Move downward and apply pressure to the spring 710 until the telescopic block 708 rotates. Under the elastic force of the spring 710, the outer wall of the telescopic block 708 re-docking with the inner cavity of the first reciprocating screw rod 705, so that the telescopic block 708 moves to the inner cavity of the first reciprocating screw rod 705, thereby giving the first reciprocating screw rod 705 a rotational force again, so that the first limit frame 5 and the second limit frame 6 return to their original positions, and the first limit frame 5 will move outward under the action of the reset spring, thereby resetting the first limit frame 5, and repeating this reciprocating process.

[0031] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A performance parameter testing device capable of simulating the working condition of a central swivel joint assembly, comprising a protective housing (1), a swivel joint (4) being placed inside the protective housing (1), a second limit frame (6) for limiting the position of the swivel joint (4) being slidably connected to the inside of the protective housing (1) via a slide groove, one end of the second limit frame (6) being slidably sleeved with a first limit frame (5) for limiting the position of the swivel joint (4) via a connecting rod, characterized in that: The invention also comprises a lifting mechanism (7), wherein the lifting mechanism (7) comprises a servo motor (701) installed inside the protective housing (1) for providing a driving force, and the lifting mechanism (7) further comprises a slider (706) connected to one end of the second limit frame (6) for transmitting an upward and downward thrust to the first limit frame (5); the inner wall of the slider (706) is connected to a first reciprocating screw (705) for transmitting torque, the bottom end of the first reciprocating screw (705) is rotatably connected to a second rotating rod (704) for transmitting torque, a movable block (707) for transmitting torque to the first reciprocating screw (705) is arranged at a connection position between the second rotating rod (704) and the first reciprocating screw (705), a second reciprocating screw (711) is arranged inside the second rotating rod (704), and the interior of the protective housing (1) is located on a side below the first limit frame (5) and is connected to an inclined block (712) for providing thrust to the first limit frame (5).

2. The performance parameter testing device capable of simulating the working condition of the center swivel joint assembly according to claim 1 is characterized in that: The lifting mechanism (7) also includes a first rotating rod (702) for transmitting torque connected to the output end of the servo motor (701); the outer wall of the first rotating rod (702) is sleeved with a chain (703) for transmitting transmission force; the inner side of the other end of the chain (703) is engaged with the outer wall of the second rotating rod (704); the top end of the movable block (707) is connected to a telescopic block (708) for docking with the first reciprocating screw rod (705); the bottom end of the telescopic block (708) is connected to a positioning block (709) for transmitting thrust to the telescopic block (708); the bottom end of the positioning block (709) is located inside the movable block (707) and is connected to a spring (710) for providing elastic force to the positioning block (709).

3. The performance parameter testing device capable of simulating the working condition of the center swivel joint assembly according to claim 1 is characterized in that: A rotating base (3) for transmitting a rotating force to the rotating joint (4) is also installed inside the protective shell (1), a testing assembly (2) for testing the rotating joint (4) is also installed inside the protective shell (1), and a reset spring is provided at the connection position between the first limit frame (5) and the second limit frame (6).

4. The performance parameter testing device capable of simulating the working condition of the center swivel joint assembly according to claim 1 is characterized in that: A movable crescent pin is provided at the connection position between the movable block (707) and the second reciprocating screw rod (711); the bottom ends of the second reciprocating screw rod (711) and the second rotating rod (704) are connected to the base; the base is rotatably connected to the second rotating rod (704); and the base is fixedly connected to the second reciprocating screw rod (711).

5. The performance parameter testing device capable of simulating the working condition of the center swivel joint assembly according to claim 1 is characterized in that: The inner walls of the second rotating rod (704) and the first reciprocating screw rod (705) are provided with a first groove for matching the vertical movement trajectory of the movable block (707) and the telescopic block (708).

6. The performance parameter testing device capable of simulating the working condition of the central swivel joint assembly according to claim 2 is characterized in that: A second groove is provided inside the movable block (707) for matching the vertical movement trajectory of the telescopic block (708) and the positioning block (709), and the outer wall of the positioning block (709) is in an "L"-shaped structure.

7. The performance parameter testing device capable of simulating the working condition of the central swivel joint assembly according to claim 2 is characterized in that: The outer wall of the telescopic block (708) is in a "convex" shape, and the top outer wall of the upper half of the telescopic block (708) coincides with the top outer wall of the movable block (707).

8. The performance parameter testing device capable of simulating the working condition of the central swivel joint assembly according to claim 2 is characterized in that: A movable crescent pin is provided at the connection position between the slider (706) and the first reciprocating screw rod (705); a first positioning groove for matching the vertical movement trajectory of the slider (706) is provided on the inner wall of the protective shell (1); a fixed seat (8) is fixed to the outer wall of the protective shell (1) at the bottom end of the second rotating rod (704); the bottom end of the second rotating rod (704) is rotatably connected to the fixed seat (8) via a bearing; and the second reciprocating screw rod (711) is fixedly connected to the fixed seat (8).

9. The performance parameter testing device capable of simulating the working condition of the center swivel joint assembly according to claim 3 is characterized in that: The inner cavities of the first limit frame (5) and the second limit frame (6) are provided with annular grooves matching the outer wall of the rotary joint (4); a rubber pad for increasing friction is connected to the position where the inner cavities of the annular grooves in the upper parts of the first limit frame (5) and the second limit frame (6) contact the rotary joint (4); the inner cavities of the top protruding parts of the rotating base (3) match the outer wall of the rotary joint (4); the servo motor (701) is electrically connected to the PLC controller via a wire; a roller is rotatably connected to the inner wall of the annular grooves in the lower parts of the first limit frame (5) and the second limit frame (6) contacting the rotary joint (4); and a rubber pad is provided at the position where the rotary joint (4) contacts the rotating base (3).

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