Cantilever type centrifugal machine mechanical seal pressure test tool

Abstract

The utility model provides a cantilever type centrifugal machine mechanical seal pressure test tool which comprises a moving ring base and a static ring base, a static ring seal positioning table used for installing a mechanical seal static ring is arranged on the upper surface of the static ring base, and a water outlet is formed in the upper surface of the static ring seal positioning table. The water outlet is communicated with a water inlet pipe installed on the static ring base, a movable ring sealing positioning table used for installing a mechanical sealing movable ring is arranged on the lower surface of the movable ring base, and a pressing assembly is arranged between the movable ring base and the static ring base. The tool can be used for grinding a new mechanical seal or an old mechanical seal and then carrying out a water pressure or air tightness test, and the new mechanical seal or the old mechanical seal is mounted after being qualified, so that the mounting quality can be ensured, secondary reworking is avoided, the old mechanical seal can be inspected, and qualified dynamic and static rings can be reused.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of seal detection, in particular to a mechanical seal pressure test tooling for a cantilever centrifuge. Background Art

[0002] The mechanical seals of the DBM series for cantilever centrifuges mainly include a stationary seal ring and a rotating seal ring. When a leakage occurs in the mechanical seal of a cantilever centrifuge, maintenance is required. In the prior art, for the mechanical seal of a cantilever centrifuge after maintenance, it is generally directly installed on the equipment for use. However, for some old mechanical seals, problems such as non-running-in of the sealing surface, cracks in the bellows, and loosening of the inlaid ring are likely to cause leakage. If the above problems cannot be detected in time during the maintenance process, leakage will still occur after the installed repaired mechanical seal, and secondary rework and repair are required.

[0003] Therefore, designing a device that can detect the performance of the mechanical seal of a cantilever centrifuge after maintenance can not only timely detect whether the repaired mechanical seal is qualified and avoid secondary rework, but also detect some old mechanical seals. Summary of the Utility Model

[0004] To solve the deficiencies of the current technology, the utility model combines the existing technology and starts from the actual application to provide a mechanical seal pressure test tooling for a cantilever centrifuge. The tooling can be used to conduct a water pressure or airtight test on a new or old mechanical seal after grinding. After passing the test, it can be installed to ensure the installation quality and avoid secondary rework. It can also inspect old mechanical seals and reuse qualified stationary and rotating seal rings.

[0005] The technical solution of the utility model is as follows:

[0006] A mechanical seal pressure test tooling for a cantilever centrifuge includes a rotating seal ring base and a stationary seal ring base. On the upper surface of the stationary seal ring base, there is a stationary seal ring positioning table for installing the mechanical seal stationary ring. On the upper surface of the stationary seal ring positioning table, there is a water outlet, which is communicated with a water inlet pipe installed on the stationary seal ring base. On the lower surface of the rotating seal ring base, there is a rotating seal ring positioning table for installing the mechanical seal rotating ring. A pressing component is arranged between the rotating seal ring base and the stationary seal ring base.

[0007] Further, the pressing component includes a guide rod, a sleeve, a threaded rod, and a nut. The lower end of the guide rod is fixed to the stationary seal ring base, and the threaded rod is arranged at the upper end of the guide rod. The sleeve is sleeved outside the guide rod and is used to press the rotating seal ring base from above. The nut is in threaded cooperation with the threaded rod and is used to press the upper end of the sleeve.

[0008] Further, the water outlet on the upper surface of the stationary seal ring positioning table is arranged at the central position, and the bottom of the guide rod is located inside the water outlet.

[0009] Furthermore, a through hole for the guide rod to extend is provided at the center of the dynamic seal base and the dynamic seal positioning table, and a first sealing ring is provided at the through hole.

[0010] Furthermore, a pressure gauge is provided on one side of the dynamic seal base, and the pressure gauge is communicated with the through hole.

[0011] Furthermore, a plurality of static seal positioning tables are provided on the static seal base, the diameters of the plurality of static seal positioning tables are different, and a static seal ring is provided in the circumferential direction of the static seal positioning table.

[0012] Furthermore, a plurality of dynamic seal positioning tables are provided on the dynamic seal base, the diameters of the plurality of dynamic seal positioning tables are different, and a dynamic seal ring is provided in the circumferential direction of the dynamic seal positioning table.

[0013] Advantages of the present utility model:

[0014] 1. After installing the dynamic and static rings of the mechanical seal, this tooling can conduct a water pressure or airtight test. Therefore, this tooling can be used to conduct a seal test on a new or old mechanical seal after grinding. After passing the test, it can be installed to ensure the installation quality and avoid secondary rework. It can also inspect the old mechanical seal and reuse the qualified dynamic and static rings.

[0015] 2. The structure of this tooling is reasonably designed, which can facilitate the installation and locking of the dynamic and static rings of the mechanical seal. The set sealing structure can ensure the sealing performance during the test, and the tooling can achieve rapid assembly and can be reused.

[0016] 3. This tooling has a simple structure, small volume, and is convenient to carry. By setting dynamic and static seal positioning tables with different sizes, it can conduct a pressure test on the mechanical seals of different sizes of cantilever centrifuges. Description of the drawings

[0017] Attached Figure 1 is a schematic diagram of the overall structure of the present utility model.

[0018] Reference numerals shown in the drawings:

[0019] 1. Static seal base; 2. Water inlet pipe; 3. Static seal positioning table; 4. Dynamic seal positioning table; 5. Pressure gauge; 6. Dynamic seal base; 7. Nut; 8. Threaded rod; 9. Sleeve; 10. First sealing ring; 11. Through hole; 12. Dynamic seal ring; 13. Guide rod; 14. Water outlet; 15. Static seal ring. Detailed implementation manners

[0020] In combination with the attached drawings and specific embodiments, the present utility model will be further described. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by this application.

[0021] This embodiment provides a cantilever centrifuge mechanical seal pressure test tooling, which is used to simulate the working state of the mechanical seal on the pump. With the working pressure as a reference, it checks whether the mechanical seal leaks. After passing the inspection, it is installed and put into use to avoid repair due to mechanical seal leakage after installation.

[0022] Refer to Figure 1 As shown, the mechanical seal pressure test tooling of this embodiment mainly includes a dynamic ring part and a static ring part. The two parts are of a split structure and can be assembled.

[0023] The structure of the static ring part of the tooling in this embodiment is as follows: it includes a static ring base 1. On the upper surface of the static ring base 1, a static ring seal positioning platform 3 for installing the mechanical seal static ring is provided. A static ring seal ring 15 for sealing is arranged circumferentially on the static ring seal positioning platform 3. And a water outlet 14 is provided on the upper surface of the static ring seal positioning platform 3. The water outlet 14 is communicated with a water inlet pipe 2 installed on the static ring base 1. The water inlet pipe 2 is used to connect to a pressure pump.

[0024] The structure of the dynamic ring part of the tooling in this embodiment is as follows: it includes a dynamic ring base 6. On the lower surface of the dynamic ring base 6, a dynamic ring seal positioning platform 4 for installing the mechanical seal dynamic ring is provided. A dynamic ring seal ring 12 is arranged circumferentially on the dynamic ring seal positioning platform 4.

[0025] In the above structure, the static ring of the mechanical seal is installed on the static ring seal positioning platform 3, and the dynamic ring of the mechanical seal is installed on the dynamic ring seal positioning platform 4. During the pressure test process, it is necessary to make the static ring and the dynamic ring fit tightly. Therefore, this tooling is also provided with a pressing component. The specific structure of the pressing component is as follows:

[0026] It includes a guide rod 13, a sleeve 9, a threaded rod 8 and a nut 7. The bottom of the guide rod 13 passes through the water outlet 14 and is fixed to the stationary ring base 1, which is located at the central position of the stationary ring base 1. The moving ring base 6 is sleeved on the guide rod 13 and can move up and down along the guide rod 13. Since the upper part of the guide rod 13 needs to pass through the moving ring base 6, a through hole 11 is provided at the center of the moving ring base 6, and a first sealing ring 10 is provided at the through hole 11 to ensure the sealing between the moving ring base 6 and the guide rod 13. And the through hole 11 is communicated with the pressure gauge 5, and the pressure inside the seal during the pressure test can be detected through the pressure gauge 5. A section of threaded rod 8 is provided on the upper part of the guide rod 13, and the nut 7 is screwed onto the threaded rod 8. The sleeve 9 is sleeved outside the guide rod 13, and its lower end abuts against the upper surface of the moving ring base 6. By rotating the nut 7 to press the sleeve 9, and then applying a force downward on the moving ring base 6 through the sleeve 9, the seal between the stationary ring and the moving ring of the mechanical seal during the pressure test is ensured.

[0027] As shown in the reference figure, in this embodiment, two stationary ring seal positioning platforms 3 are provided on the stationary ring base 1, and the diameters of the two stationary ring seal positioning platforms 3 are different. Similarly, two moving ring seal positioning platforms 4 are provided on the moving ring base 6, and the diameters of the two moving ring seal positioning platforms 4 are different. By setting two positioning platforms with different diameters, this tooling can be adapted to the mechanical seal detection of two specifications.

[0028] The usage method and principle of this tooling are as follows:

[0029] 1) Install the stationary ring of the mechanical seal of the cantilever centrifuge into the stationary ring seal positioning platform 3 in the stationary ring base 1;

[0030] 2) Install the moving ring of the mechanical seal of the cantilever centrifuge into the moving ring seal positioning platform 4 in the moving ring base 6;

[0031] 3) Fasten the stationary ring seal positioning platform 3 with the stationary ring and the moving ring seal positioning platform 4 with the moving ring together so that the sealing surfaces are in contact;

[0032] 4) Install the sleeve 9 and install the adjusting nut 7, and compress the total height by 4 mm, that is, the compression amount;

[0033] 5) After filling the sealing cavity formed by the moving ring and the stationary ring of the mechanical seal with liquid through the pressure pump, tighten the pressure gauge 5 and pressurize to 0.4 MPa;

[0034] 6) Carefully observe whether there is leakage at the mechanical seal sealing surface, the joint of the stationary and moving rings and the bellows. If there is no leakage, it is confirmed that the stationary and moving rings are qualified.

Claims

1. A cantilever centrifuge mechanical seal pressure test tool, characterized in that: It includes a dynamic ring base and a static ring base. The upper surface of the static ring base is provided with a static ring sealing positioning platform for installing a static ring of a mechanical seal. The upper surface of the static ring sealing positioning platform is provided with a water outlet. The water outlet is connected with a water inlet pipe installed on the static ring base. The lower surface of the dynamic ring base is provided with a dynamic ring sealing positioning platform for installing a dynamic ring of the mechanical seal. A clamping assembly is provided between the dynamic ring base and the static ring base.

2. The cantilever centrifuge mechanical seal pressure test tooling according to claim 1, characterized in that: The clamping assembly includes a guide rod, a sleeve, a threaded rod and a nut. The lower end of the guide rod is fixed to the static ring base, and the threaded rod is arranged on the upper end of the guide rod. The sleeve is sleeved on the outside of the guide rod to press the dynamic ring base from the top down, and the threaded cooperation between the nut and the threaded rod is used to clamp the upper end of the sleeve.

3. The cantilever centrifuge mechanical seal pressure test tooling according to claim 2, characterized in that: The water outlet on the upper surface of the static ring sealing positioning platform is arranged at the center position, and the bottom of the guide rod is located in the water outlet.

4. The cantilever centrifuge mechanical seal pressure testing tool according to claim 3, characterized in that: A through hole for the guide rod to extend out is arranged at the center of the dynamic ring base and the dynamic ring sealing positioning platform, and a first sealing ring is arranged at the through hole.

5. The cantilever centrifuge mechanical seal pressure test tooling according to claim 4, characterized in that: A pressure gauge is arranged on one side of the dynamic ring base, and the pressure gauge is communicated with the through hole.

6. The cantilever centrifuge mechanical seal pressure test tooling according to claim 1, characterized in that: A plurality of stationary ring sealing positioning platforms are arranged on the stationary ring base, the diameters of the plurality of stationary ring sealing positioning platforms are different, and a stationary ring sealing ring is arranged circumferentially of the stationary ring sealing positioning platforms.

7. The cantilever centrifuge mechanical seal pressure testing tool according to claim 1, characterized in that: A plurality of dynamic ring sealing positioning platforms are arranged on the dynamic ring base, the diameters of the plurality of dynamic ring sealing positioning platforms are different, and a dynamic ring sealing ring is arranged circumferentially of the dynamic ring sealing positioning platforms.

Images