Universal visual dynamic rotary joint pressure test gauge

Abstract

The utility model relates to the technical field of water-cooling rotary joints, and discloses a universal visual dynamic rotary joint pressure test gauge, which comprises a bottom plate, an electromagnetic speed regulating motor and a rotary head fixing mechanism are arranged at the top end of the bottom plate, and the rotary head fixing mechanism is used for fixing a rotary joint. The end, away from the rotating head fixing mechanism, of the rotating connector is connected with a rotating piece, and the rotating piece is connected with an electromagnetic speed adjusting motor and used for driving the rotating connector to rotate. By changing the inner hole diameter, the inner hole length and the water inlet position of the sealing sleeve of the fixed shell, and changing the inner hole length, the inner hole diameter, the pin welding position and other sizes of the rotating piece, the testing fixture can be suitable for the dynamic testing of the sealing performance of various rotating joints with different sizes and sizes of the same type.

Description

Technical Field

[0001] The utility model relates to the technical field of water-cooled rotary joints, in particular to a universal visual dynamic rotary joint pressure test fixture. Background Art

[0002] As a key component for the exchange of internal and external cooling water (high and low temperature water) in continuous casting roller equipment, the rotary joint has the characteristics of complex structure, high precision and sealing performance requirements, and must adapt to high temperature working conditions. This series of high requirements leads to high cost of use.

[0003] During the use of the water-cooled rotary joint of the continuous casting roller, the sealing quality of the hollow shaft and the graphite sleeve, two parts that contact each other and rotate relative to each other, is directly related to whether the rotary joint will leak. However, the sealing structure of the rotary joint currently used is not very good and is prone to leakage.

[0004] Chinese utility model patent application number 201020062515.1 proposes a water-cooled rotary joint for continuous casting rollers, including a right-angle elbow, a hollow shaft, a flange sleeve, and a graphite sleeve; one end of the hollow shaft is fastened to the right-angle elbow by a screw, and the other end extends into the flange sleeve. A graphite sleeve that matches both the hollow shaft and the flange sleeve is installed radially between the hollow shaft and the flange sleeve. The front end of the graphite sleeve is pressed against the inner end face of the flange sleeve, and its rear end is an inclined surface: the contact surface on the hollow shaft that matches the inclined surface of the graphite sleeve is a spherical surface.

[0005] However, in this technical solution, during use, there is a possibility of water leakage at the dynamic and static sealing points of all contact positions. No pre-use inspection is carried out, and the rotary joint is directly connected to the continuous casting roller, which can easily cause water leakage in the rotary joint. In the above technical solution, after the rotary joint leaks, it cannot be discovered immediately, resulting in delayed modification and aggravated erosion of the rotary joint.

[0006] Therefore, a universal visual dynamic rotary joint pressure test fixture is used to solve the above problems. Summary of the Invention

[0007] The purpose of the utility model is to provide a universal visual dynamic rotary joint pressure test fixture to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solution: it includes a base plate, the top end of which is provided with an electromagnetic speed regulation motor and a rotating head fixing mechanism, the rotating head fixing mechanism is used to fix the rotary joint, and the end of the rotary joint away from the rotating head fixing mechanism is connected to a rotating part, and the rotating part is connected to the electromagnetic speed regulation motor for driving the rotary joint to rotate.

[0009] Preferably, the rotary joint includes a fixed shell, a water inlet hole is provided on the outside of the fixed shell, a spring is provided on the right side of the inside of the fixed shell, two silicon carbide gaskets are provided on the right side of the spring, a movable inner core is provided on the right side of the right silicon carbide gasket, and a retaining spring is provided between the movable inner core and the inner side wall of the fixed shell.

[0010] Preferably, a groove is provided on the outer circumferential surface of the movable inner core.

[0011] Preferably, the rotating head fixing mechanism includes a pressing block located on one side of the fixed shell, and a support frame is provided below the fixed shell.

[0012] Preferably, the right side of the movable inner core is connected to the rotating member, and a pin is provided inside the rotating member, and the pin is connected to the groove of the movable inner core.

[0013] Preferably, the rotating member is provided with a transmission wheel, and a transmission belt is provided between the transmission wheel and the electromagnetic speed regulation motor.

[0014] Preferably, a frame is provided at one end of the rotating member close to the movable inner core, a bearing is provided inside the frame, and a hole retaining ring and a shaft retaining ring are provided on both sides of the bearing respectively.

[0015] Preferably, the hole retaining ring and the shaft retaining ring are respectively arranged on both sides of the interior of the frame.

[0016] Preferably, the bearing is used for rotational support of the movable inner core.

[0017] Preferably, an observation window is provided above the water inlet.

[0018] Technical effects and advantages of this utility model:

[0019] 1. This utility model and this inspection tool can be applied to the dynamic inspection of the sealing performance of a class of rotary joints of the same type with various sizes and dimensions by changing the inner hole diameter, inner hole length, water inlet position of the fixed shell sealing sleeve, and the inner hole length, inner hole diameter, pin welding position and other dimensions of the rotating part.

[0020] 2. The utility model provides a set speed under the working conditions of the continuous casting equipment through an electromagnetic speed-regulating motor, applies a corresponding speed to the movable inner core of the rotary joint through a rotating part, and at the same time, a fixed pressure of clean water is introduced into the rotary joint. By maintaining the pressure for a certain period of time, the leakage and water seepage of each sealing point are observed, and the dynamic sealing test of the rotary joint is performed.

[0021] 3. The water inlet hole outside the fixed shell of the rotary joint of the utility model is used to inject water into the rotary joint. The spring inside the fixed shell is used to push the silicon carbide gasket on the left to move. The moving direction is the silicon carbide gasket on the right, so that the silicon carbide gasket on the left is in close contact with the silicon carbide gasket on the right. Figure 5 , to prevent the silicon carbide gasket on the right from leaking when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2 This is a schematic diagram of the connection structure between the fixed shell and the support frame of the utility model.

[0024] Figure 3 This is a schematic diagram of the connection structure between the movable inner core and the rotating part of the utility model.

[0025] Figure 4 This is a schematic diagram of the structure of the rotary joint of the utility model.

[0026] Figure 5 This is a schematic diagram of the structure of the enlarged contact view of the silicon carbide sealing sheets on the left and right sides of the utility model.

[0027] In the figure: 1. Base plate; 2. Electromagnetic speed regulating motor; 3. Support frame; 4. Rotating head fixing mechanism; 5. Transmission belt; 6. Observation window; 7. Pressing block; 8. Fixed shell; 9. Water inlet hole; 10. Transmission wheel; 11. Rotating part; 12. Retaining ring for hole; 13. Pin; 14. Bearing; 15. Retaining ring for shaft; 16. Movable inner core; 17. Groove; 18. Retaining spring; 19. Spring; 20. Silicon carbide gasket; 21. Frame. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The utility model provides Figures 1 to 5 The shown general visual dynamic rotary joint pressure test fixture includes a base plate 1, the top of the base plate 1 is provided with an electromagnetic speed regulation motor 2 and a rotary head fixing mechanism 4, the rotary head fixing mechanism 4 is used to fix the rotary joint, and the end of the rotary joint away from the rotary head fixing mechanism 4 is connected to a rotating part 11, and the rotating part 11 is connected to the electromagnetic speed regulation motor 2 for driving the rotary joint to rotate.

[0030] When in use, the base plate 1 fixes the rotating head fixing mechanism 4 and the electromagnetic speed regulating motor 2. The rotating head fixing mechanism 4 is used to fix the rotation to facilitate the experimental rotation of the rotary joint. The other end of the rotary joint is sleeved with the rotating part 11 to drive the rotation of the rotary joint. The electromagnetic speed regulating motor 2 is connected to the rotating part 11 through a transmission belt 5 and a power source.

[0031] The electromagnetic speed regulating motor 2 provides the set speed under the working conditions of the continuous casting equipment, and the corresponding speed is applied to the movable inner core 16 of the rotary joint through the rotating part 11. At the same time, clean water with a fixed pressure is introduced into the rotary joint. By maintaining the pressure for a certain period of time, the leakage and water seepage of each sealing point are observed, and the dynamic sealing test of the rotary joint is performed.

[0032] The rotating head includes a fixed shell 8, a water inlet hole 9 is provided on the outside of the fixed shell 8, a spring 19 is provided on the right side of the inside of the fixed shell 8, two silicon carbide gaskets 20 are provided on the right side of the spring 19, a movable inner core 16 is provided on the right side of the right silicon carbide gasket 20, and a retaining spring 18 is provided between the movable inner core 16 and the inner side wall of the fixed shell 8.

[0033] When in use, the water inlet 9 outside the fixed shell 8 of the rotary joint is used to inject water into the rotary joint, and the spring 19 inside the fixed shell 8 is used to push the silicon carbide gasket 20 on the left to move, and the moving direction is the silicon carbide gasket 20 on the right, so that the silicon carbide gasket 20 on the left is in close contact with the silicon carbide gasket 20 on the right. Figure 5 , to prevent the silicon carbide gasket 20 on the right from leaking when rotating.

[0034] The silicon carbide gasket 20 on the right is welded to the movable inner core 16. When the movable inner core 16 rotates, it is easy to drive the silicon carbide gasket 20 on the right to rotate. The movable inner core 16 is sleeved inside the fixed shell 8 and is fixed inside the fixed shell 8 by the retaining spring 18.

[0035] A groove 17 is formed on the outer circumferential surface of the movable inner core 16 .

[0036] When in use, the movable inner core 16 is provided with a groove 17 at one end away from the fixed shell 8 . The groove 17 is a U-shaped groove, which facilitates the engagement of the pin 13 .

[0037] The rotating head fixing mechanism 4 includes a pressing block 7 located on one side of a fixed housing 8 , and a support frame 3 is provided below the fixed housing 8 .

[0038] When in use, one end of the fixed shell 8 is fixed to the support frame 3 by a clamping block 7, and the end face of the base plate 1 is provided with a long circular groove on the support frame 3, which can adjust the position of the fixed rotary joint horizontally and vertically to ensure the relative position of the rotary joint and the electromagnetic speed regulation motor 2, and at the same time the belt can be tensioned.

[0039] The right side of the movable inner core 16 is connected to the rotating member 11 . A pin 13 is provided inside the rotating member 11 . The pin 13 is connected to the groove 17 of the movable inner core 16 .

[0040] When in use, the movable inner core 16 and the rotating member 11 are sleeved together. Figure 3 A sealing ring is provided on the outer circular surface of one end of the movable inner core 16 close to the rotating member 11, which is used to seal the movable inner core 16 and the rotating member 11 to prevent water leakage.

[0041] The pin 13 of the rotating member 11 is engaged with the groove 17 of the movable inner core 16 to drive the movable inner core 16 to rotate.

[0042] The rotating member 11 is provided with a transmission wheel 10 , and a transmission belt 5 is provided between the transmission wheel 10 and the electromagnetic speed regulating motor 2 .

[0043] When in use, when the electromagnetic speed regulating motor 2 drives the rotary joint through the transmission belt 5, the movable inner core 16 rotates at a speed of 10-15 rpm. During the rotation process, there is a possibility of water leakage at the dynamic and static sealing points of all its contact positions. In particular, for reused old rotary joints, its sealing performance at the corresponding speed must be ensured.

[0044] A frame 21 is provided at one end of the rotating member 11 close to the movable inner core 16 , a bearing 14 is provided inside the frame 21 , and a hole retaining ring 12 and a shaft retaining ring 15 are provided on both sides of the bearing 14 .

[0045] The hole retaining ring 12 and the shaft retaining ring 15 are respectively arranged on both sides of the interior of the frame 21 .

[0046] The bearing 14 is used for rotational support of the movable inner core 16 .

[0047] When in use, the movable inner core 16 of the rotary joint is assembled on the rotating part 11 through the bearing 14, the hole retaining ring 12, and the shaft retaining ring 15 to provide rotational support for the movable inner core 16. Mechanical processing is used to ensure that the coaxiality of the movable inner core 16 relative to the fixed shell 8 is within 0.05mm. This accuracy matches the design and processing accuracy of the continuous casting equipment, so as to be infinitely close to the working conditions of the rotary joint, ensuring that the rotary joint that has been inspected by the inspection fixture will not leak during operation.

[0048] An observation window 6 is provided above the water inlet 9 .

[0049] When in use, the observation window 6 is used to check whether there is water leakage at the corresponding position of the rotary joint.

[0050] How it works

[0051] During the inspection, after the rotary joint is installed, the pin 13 welded on the rotating part 11 is inserted into the groove 17 of the movable inner core 16 of the rotary joint. The electromagnetic speed regulating motor 2 is used to drive the rotating part 11 through the transmission belt 5 to rotate the transmission wheel 10, and the transmission wheel 10 drives the rotating part 11 to rotate. During the rotation process, the pin 13 drives the movable inner core 16 of the rotary joint to rotate, so as to be infinitely close to the working conditions of the rotary joint, ensuring that the rotary joint that has been inspected by the inspection fixture will not leak during operation.

[0052] The whole inspection process is completed by the following steps: install the rotary joint to be inspected - tighten the rotary joint with the clamping block 7 and the clamping bolt - inject clean water with a fixed pressure through the water inlet 9 and maintain the pressure - start the electromagnetic speed regulating motor 2 and adjust the speed - check point A respectively, and check points B, C, and D through the observation window 6 for leakage and water seepage. Figure 3 .

[0053] At the same time, this inspection tool can be applied to dynamic sealing inspection of a class of rotary joints of the same type with various sizes and dimensions by changing the inner hole diameter, inner hole length, water inlet position of the sealing sleeve of the fixed shell 8, the inner hole length, inner hole diameter, and welding position of the pin 13 of the rotating part 11.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A universal visual dynamic rotary joint pressure test fixture, characterized by: The invention comprises a base plate (1), the top end of the base plate (1) being provided with an electromagnetic speed regulating motor (2) and a rotary head fixing mechanism (4), the rotary head fixing mechanism (4) being used to fix a rotary joint, and an end of the rotary joint away from the rotary head fixing mechanism (4) being connected to a rotating member (11), the rotating member (11) being connected to the electromagnetic speed regulating motor (2) and being used to drive the rotary joint to rotate.

2. A universal visual dynamic rotary joint pressure test fixture according to claim 1, characterized in that: The rotary joint comprises a fixed shell (8), a water inlet hole (9) is provided on the outside of the fixed shell (8), a spring (19) is provided on the right side of the inside of the fixed shell (8), two silicon carbide gaskets (20) are provided on the right side of the spring (19), a movable inner core (16) is provided on the right side of the right silicon carbide gasket (20), and a retaining spring (18) is provided between the movable inner core (16) and the inner side wall of the fixed shell (8).

3. A universal visual dynamic rotary joint pressure test fixture according to claim 2, characterized in that: The outer circumferential surface of the movable inner core (16) is provided with a groove (17).

4. The universal visual dynamic rotary joint pressure test fixture according to claim 3, characterized in that: The rotating head fixing mechanism (4) comprises a pressing block (7) located on one side of a fixed shell (8), and a support frame (3) is provided below the fixed shell (8).

5. The universal visual dynamic rotary joint pressure test fixture according to claim 4, characterized in that: The right side of the movable inner core (16) is connected to the rotating member (11), and a pin (13) is provided inside the rotating member (11), and the pin (13) is connected to the groove (17) of the movable inner core (16).

6. The universal visual dynamic rotary joint pressure test fixture according to claim 5, characterized in that: The rotating member (11) is provided with a transmission wheel (10), and a transmission belt (5) is provided between the transmission wheel (10) and the electromagnetic speed regulating motor (2).

7. The universal visual dynamic rotary joint pressure test fixture according to claim 6, characterized in that: A frame (21) is provided at one end of the rotating member (11) close to the movable inner core (16), a bearing (14) is provided inside the frame (21), and a hole retaining ring (12) and a shaft retaining ring (15) are respectively provided on both sides of the bearing (14).

8. The universal visual dynamic rotary joint pressure test fixture according to claim 7, characterized in that: The hole retaining ring (12) and the shaft retaining ring (15) are respectively arranged on both sides of the interior of the frame (21).

9. The universal visual dynamic rotary joint pressure test fixture according to claim 8, characterized in that: The bearing (14) is used for rotational support of the movable inner core (16).

10. The universal visual dynamic rotary joint pressure test fixture according to claim 2, characterized in that: An observation window (6) is provided above the water inlet hole (9).

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