Mechanical seal static ring with flexible graphite seal ring compression device

Abstract

The application relates to a press-fitting device for a flexible graphite seal ring of a mechanical seal static ring, and relates to the field of mechanical manufacturing technology, which comprises a bottom plate, a cover plate and a top plate, four stand columns are fixedly arranged on the top of the bottom plate, four guide rods are fixedly connected to the top of the four stand columns, the guide rods are coaxial with the stand columns, and the diameter of the guide rods is smaller than that of the stand columns; four first through holes for the guide rods to pass through are formed in the cover plate, the top of the four guide rods is fixedly connected with the top plate, and the top plate is arranged directly above the cover plate; a hand-operated jack is fixedly arranged on the top of the bottom plate, the driving end of the hand-operated jack is fixedly connected with the bottom of the cover plate; a buffer spring is coaxially arranged on each of the four guide rods, and the two ends of the buffer spring are fixedly connected with the top plate and the cover plate. The application can provide stable and uniform pressure for assembly operation, and reduce the generation of defective products in the assembly process.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing technology, and in particular to a press-fitting device for a mechanical seal stationary ring fitted with a flexible graphite sealing ring. Background Technology

[0002] High-temperature metal bellows mechanical seals require flexible graphite sealing rings. Due to the interference fit of flexible graphite during installation, installing it on the stationary ring presents challenges. Unlike fluororubber sealing rings, flexible graphite sealing rings are easily damaged by hand pressure during installation, as it's difficult to maintain even force with both hands. This tilting can easily lead to damage, causing leakage from the damaged area of ​​the mechanical seal's high static pressure. Severely damaged rings require replacement, resulting in low reliability of the assembled stationary ring and failure to meet assembly requirements. Furthermore, frequent replacements can delay delivery and cause significant losses. Utility Model Content

[0003] In order to provide stable and uniform pressure for assembly operations and reduce the generation of defective products during assembly, this application provides a press-fitting device for a mechanical seal stationary ring with a flexible graphite sealing ring.

[0004] The pressing device for fitting a mechanical seal stationary ring with a flexible graphite sealing ring provided in this application adopts the following technical solution: A pressing device for a mechanical seal stationary ring fitted with a flexible graphite sealing ring mainly includes a base plate, a cover plate and a top plate. Four columns are fixedly installed on the top of the base plate, and four guide rods are fixedly connected to the top of the four columns. The guide rods are coaxial with the columns, and the diameter of the guide rods is smaller than the diameter of the columns. The cover plate has four through holes for guide rods to pass through. The tops of the four guide rods are fixedly connected to the top plate, which is mounted directly above the cover plate. A hand-cranked jack is fixedly installed on the top of the base plate, and the drive end of the hand-cranked jack is fixedly connected to the bottom of the cover plate. Each of the four guide rods is coaxially fitted with a buffer spring, and the two ends of the buffer spring are fixedly connected to the top plate and the cover plate, respectively.

[0005] By adopting the above technical solution, before performing the assembly operation, the operator pre-assembles the stationary ring seat, flexible graphite, sealing ring, graphite gasket, and pad according to the assembly sequence and places them on the cover plate. Subsequently, the operator can drive the cover plate upward by hand-cranking a jack until the top pad is pressed against the top plate. The jack continuously applies pressure, providing the stable pressure required for assembly, ensuring a smooth, quick, and uniform pressure distribution during the installation process, and reducing the probability of defective products during assembly. With the addition of a buffer spring, when the jack drives the cover plate upward, the guide rod ensures that the cover plate moves up and down along the axial direction of the guide rod. At the same time, the compressed buffer spring creates resistance, improving the stability of the cover plate's upward movement.

[0006] Preferably, the inner wall of the first through hole is fixedly connected with a wear-resistant copper sleeve, and the wear-resistant copper sleeve is coaxially sleeved on the outside of the guide rod.

[0007] By adopting the above technical solution, the wear-resistant copper sleeve can reduce the occurrence of the first through hole diameter becoming larger due to the friction between the guide rod and the inner wall of the first through hole during the lifting of the cover plate.

[0008] Preferably, the base plate has four mounting screw holes, and the bottom of each column is fixedly connected with a first threaded connection part, which is threaded into the four mounting screw holes respectively.

[0009] Preferably, a second threaded connection is fixedly connected to the top of the guide rod, the second threaded connection is coaxial with the guide rod, and the diameter of the second threaded connection is smaller than the diameter of the guide rod; The top plate has four through holes that are adapted to the second threaded connection part. The ends of the second threaded connection part that pass through the second through holes are all threaded with locking nuts. The top plate is pressed against the top of the guide rod and between the locking nuts.

[0010] Preferably, a lifting ring is fixedly installed on the top of the top plate.

[0011] By adopting the above technical solution, the device can be easily transported and moved using lifting rings.

[0012] Preferred options also include: A thin-film pressure sensor is fixedly installed at the bottom of the cover plate and pressed against the top of the column. It is used to detect the contact pressure between the cover plate and the top of the column and output the sensed pressure signal. A ranging unit is fixedly installed between the cover plate and the bottom plate to monitor the distance between the cover plate and the bottom plate and output a sensed distance signal. The display is fixedly installed on the side wall of the column and is connected to the signal output terminal of the ranging unit to receive and display the sensed distance signal. The microcontroller has its signal input terminal connected to the signal output terminal of the thin-film pressure sensor, and its signal output terminal connected to the signal input terminal of the ranging unit. It is used to control the ranging unit to start when the sensed pressure is less than a set value.

[0013] By employing the above technical solution, and through the coordinated use of a thin-film pressure sensor, a ranging unit, a display, and a microcontroller, the system can automatically sense the operator's movements. Simultaneously, when the operator uses a jack to lift the cover plate and separates it from the top of the column, the ranging unit is automatically activated. The display shows the distance between the cover plate and the base plate, facilitating the operator's assessment of the cover plate's position and assembly status. The coordinated use of the thin-film pressure sensor and the microcontroller ensures that the ranging unit is automatically activated when the cover plate separates from the top of the column.

[0014] Preferably, the ranging unit includes an ultrasonic ranging sensor, which is fixedly installed on the top of the base plate, and the sensing end of the ultrasonic ranging sensor is opposite to the bottom of the cover plate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of Embodiment 1 of this application used to illustrate the internal structure of the pressing device.

[0016] Figure 2 This is a schematic diagram of Embodiment 1 of this application used to illustrate the overall structure of the pressing device.

[0017] Explanation of reference numerals in the attached drawings: 1. Base plate; 11. Mounting screw hole; 2. Cover plate; 21. First through hole; 22. Wear-resistant copper sleeve; 23. Stationary ring seat; 24. Flexible graphite; 25. Sealing ring; 26. Graphite pad; 27. Pad block; 3. Top plate; 31. Second through hole; 32. Lifting ring; 4. Column; 41. First threaded connection; 5. Guide rod; 51. Second threaded connection; 6. Hand-cranked jack; 7. Buffer spring; 8. Locking nut. Detailed Implementation

[0018] The following combination Figures 1-2 This application will be described in further detail.

[0019] Example 1 This application discloses a press-fitting device for fitting a flexible graphite sealing ring to a mechanical seal stationary ring. (Refer to...) Figure 1It mainly includes a base plate, a cover plate 2, and a top plate 3. Four columns 4 are fixedly installed on the top of the base plate. Four guide rods 5 are fixedly connected to the top of the four columns 4. The guide rods 5 are coaxial with the columns 4, and the diameter of the guide rods 5 is smaller than the diameter of the columns 4. Four first through holes 21 are opened through the cover plate 2 for the guide rods 5 to pass through. The top of the four guide rods 5 is fixedly connected to the top plate 3. The top plate 3 is erected directly above the cover plate 2. A hand-cranked jack 6 is fixedly installed on the top of the base plate. The driving end of the hand-cranked jack 6 is fixedly connected to the bottom of the cover plate 2. Each of the four guide rods 5 is coaxially fitted with a buffer spring 7. The two ends of the buffer spring 7 are fixedly connected to the top plate 3 and the cover plate 2, respectively.

[0020] Before performing the assembly operation, the operator pre-assembles the stationary ring seat 23, flexible graphite 24, sealing ring 25, graphite pad 26, and pad block 27 according to the assembly sequence and places them on the cover plate 2. Then, the operator can drive the cover plate 2 upward by hand-cranking the jack 6 until the top pad block 27 is pressed against the top plate 3. The jack continuously applies pressure, which can provide the stable pressure required for assembly, ensuring a smooth, quick, and uniform pressure distribution during the installation process, and reducing the probability of defective products during assembly. With the setting of the buffer spring 7, when the jack drives the cover plate 2 to rise, the guide rod 5 can ensure that the cover plate 2 moves up and down along the axis of the guide rod 5. At the same time, the buffer spring 7 is compressed to form resistance, which can improve the stability of the cover plate 2 during rise.

[0021] Reference Figure 1 Wear-resistant copper sleeves 22 are fixedly connected to the inner wall of the first through hole 21, and the wear-resistant copper sleeves 22 are coaxially sleeved on the outside of the guide rod 5. The wear-resistant copper sleeves 22 can reduce the occurrence of the hole diameter of the first through hole 21 becoming larger due to the friction between the guide rod 5 and the inner wall of the first through hole 21 during the rising of the cover plate 2.

[0022] Reference Figure 1 The base plate has four mounting screw holes 1 and 11. The bottom of each column 4 is fixedly connected to a first threaded connection part 41, which is threadedly installed in the four mounting screw holes 1 and 11 respectively.

[0023] Reference Figure 1 and Figure 2 The top of the guide rod 5 is fixedly connected to a second threaded connection part 51. The second threaded connection part 51 is coaxial with the guide rod 5, and the diameter of the second threaded connection part 51 is smaller than the diameter of the guide rod 5. The top plate 3 is provided with four second through holes 31 that are adapted to the second threaded connection part 51. The ends of the second threaded connection part 51 that pass through the second through holes 31 are all threadedly connected to locking nuts 8. The top plate 3 is pressed against the top of the guide rod 5 and between the locking nuts 8.

[0024] Reference Figure 1 and Figure 2A lifting ring 32 is fixedly installed on the top of the top plate 3. The lifting ring 32 facilitates the handling and transfer of the device.

[0025] The working principle of this utility model is as follows: Before performing the assembly operation, the operator pre-assembles the stationary ring seat 23, flexible graphite 24, sealing ring 25, graphite pad 26, and pad block 27 according to the assembly sequence and places them on the cover plate 2. Then, the operator can drive the cover plate 2 upward by hand-cranking the jack 6 until the top pad block 27 is pressed against the top plate 3. The jack continuously applies pressure, which can provide the stable pressure required for assembly, ensuring a smooth, quick, and uniform pressure distribution during the installation process, and reducing the probability of defective products during assembly. With the setting of the buffer spring 7, when the jack drives the cover plate 2 to rise, the guide rod 5 can ensure that the cover plate 2 moves up and down along the axial direction of the guide rod 5. At the same time, the buffer spring 7 is compressed to form resistance, which can improve the stability of the cover plate 2 during rise.

[0026] Example 2 In this embodiment, the pressing device further includes: a thin-film pressure sensor, fixedly installed at the bottom of the cover plate and pressed against the top of the column, used to detect the contact pressure between the cover plate and the top of the column and output a sensed pressure signal; a ranging unit, fixedly installed between the cover plate and the bottom plate, used to monitor the distance between the cover plate and the bottom plate and output a sensed distance signal; a display, fixedly installed on the side wall of the column and connected to the signal output terminal of the ranging unit, used to receive and display the sensed distance signal; and a microcontroller, whose signal input terminal is connected to the signal output terminal of the thin-film pressure sensor and whose signal output terminal is connected to the signal input terminal of the ranging unit, used to control the ranging unit to start when the sensed pressure is less than a set value.

[0027] By combining a thin-film pressure sensor, a ranging unit, a display, and a microcontroller, the system can automatically sense the operator's movements. When the operator uses a jack to lift the cover plate and separate it from the top of the column, the ranging unit is automatically activated. The display shows the distance between the cover plate and the base plate, allowing the operator to determine the cover plate's position and assembly status. The thin-film pressure sensor and microcontroller work together to automatically activate the ranging unit when the cover plate separates from the top of the column.

[0028] It should be noted that in this embodiment, the ranging unit uses an ultrasonic ranging sensor, which is fixedly installed on the top of the base plate, and the sensing end of the ultrasonic ranging sensor is opposite to the bottom of the cover plate.

[0029] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A press-fitting device for a mechanical seal stationary ring fitted with a flexible graphite sealing ring, characterized in that, Includes a base plate, a cover plate (2) and a top plate (3). Four columns (4) are fixedly installed on the top of the base plate. Four guide rods (5) are fixedly connected to the top of the four columns (4). The guide rods (5) are coaxial with the columns (4), and the diameter of the guide rods (5) is smaller than the diameter of the columns (4). The cover plate (2) has four first through holes (21) through which guide rods (5) pass. The tops of the four guide rods (5) are fixedly connected to the top plate (3). The top plate (3) is mounted directly above the cover plate (2). A hand-cranked jack (6) is fixedly installed on the top of the base plate, and the driving end of the hand-cranked jack (6) is fixedly connected to the bottom of the cover plate (2). Each of the four guide rods (5) is coaxially fitted with a buffer spring (7), and the two ends of the buffer spring (7) are fixedly connected to the top plate (3) and the cover plate (2) respectively. Also includes: A thin-film pressure sensor is fixedly installed at the bottom of the cover plate and pressed against the top of the column. It is used to detect the contact pressure between the cover plate and the top of the column and output the sensed pressure signal. A ranging unit is fixedly installed between the cover plate and the bottom plate to monitor the distance between the cover plate and the bottom plate and output a sensed distance signal. The display is fixedly installed on the side wall of the column and is connected to the signal output terminal of the ranging unit to receive and display the sensed distance signal; The microcontroller has its signal input terminal connected to the signal output terminal of the thin-film pressure sensor, and its signal output terminal connected to the signal input terminal of the ranging unit. It is used to control the ranging unit to start when the sensed pressure is less than the set value. The ranging unit includes an ultrasonic ranging sensor, which is fixedly installed on the top of the base plate, and the sensing end of the ultrasonic ranging sensor is opposite to the bottom of the cover plate.

2. The pressing device for a mechanical seal stationary ring with a flexible graphite sealing ring according to claim 1, characterized in that, The inner wall of the first through hole (21) is fixedly connected with a wear-resistant copper sleeve (22), and the wear-resistant copper sleeve (22) is coaxially sleeved on the outside of the guide rod (5).

3. The pressing device for a mechanical seal stationary ring with a flexible graphite sealing ring according to claim 2, characterized in that, The base plate has four mounting screw holes, and the bottom of each column (4) is fixedly connected with a first threaded connection part (41), which is threaded into the four mounting screw holes respectively.

4. The pressing device for a mechanical seal stationary ring with a flexible graphite sealing ring according to claim 3, characterized in that, The top of the guide rod (5) is fixedly connected to a second threaded connection part (51), the second threaded connection part (51) is coaxial with the guide rod (5), and the diameter of the second threaded connection part (51) is smaller than the diameter of the guide rod (5); The top plate (3) has four through holes (31) that are adapted to the second threaded connection part (51). The ends of the second threaded connection part (51) that pass through the second through holes (31) are threaded with locking nuts (8). The top plate (3) is pressed against the top of the guide rod (5) and between the locking nuts (8).

5. The pressing device for a mechanical seal stationary ring with a flexible graphite sealing ring according to claim 4, characterized in that, A lifting ring (32) is fixedly installed on the top of the top plate (3).

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