Detection device for mechanical seal

Abstract

The utility model provides a detection device for a mechanical seal. The detection device for the mechanical seal comprises a detection box; the detection part is located in the containing cavity and comprises a cylindrical structure, a mounting shaft and a gland, the cylindrical structure is provided with an open end and a closed end which are oppositely arranged, the gland is in sealed connection with the open end, a mounting through hole is formed in the gland, the mounting shaft is connected to the closed end and extends out of the mounting through hole, and the mounting shaft and the inner wall of the mounting through hole are arranged at intervals; a space used for containing the mechanical seal is defined by the installation shaft, the gland and the cylindrical structure. The liquid supply part comprises a box body and a liquid injection pipeline used for communicating the interior of the box body with the interior of the cylindrical structure, the box body is provided with a containing cavity capable of containing the colored solution, and a liquid injection pump is arranged on the liquid injection pipeline so as to pump the colored solution in the containing cavity into the cylindrical structure. According to the technical scheme of the utility model, the problem that detection personnel are inconvenient to judge due to the small leakage amount of the mechanical seal of the detection device for the mechanical seal in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seal detection, and more specifically, to a detection device for mechanical seals. Background Art

[0002] Mechanical seals are one of the most important seals for water pumps. They have high assembly requirements and precise components. After being assembled by mechanical seal manufacturers, they are used integrally on site. During transportation and storage after leaving the factory, mechanical seals may have quality problems. If on-site personnel cannot detect them in time, it may lead to mechanical seal leakage during the re-installation and water filling re-identification on site.

[0003] Therefore, in the prior art, a method of pressure testing the mechanical seal is adopted to detect the mechanical seal surface. The Chinese utility model patent with the publication number CN219015546U discloses a pressure testing device for the mechanical seal of an emergency feed water pump in a nuclear power plant. It can connect an external pressure pump through a pressure hole to perform overall pressure testing on the mechanical seal, so as to check the sealing performance of the mechanical seal surface before re-installation, thus ensuring that the pump maintenance work will not be reworked due to the quality problems of mechanical seal spare parts.

[0004] However, when the leakage amount of the pressurized liquid is small, the change in the pressure value is small. At this time, it is not convenient for the detection personnel to judge whether there is a leakage problem with the mechanical seal. Summary of the Utility Model

[0005] The main purpose of the present utility model is to provide a detection device for mechanical seals, so as to solve the problem that it is not convenient for detection personnel to judge when the leakage amount of the mechanical seal in the existing detection device for mechanical seals is small.

[0006] To achieve the above purpose, the present utility model provides a detection device for mechanical seals, including: a detection box having a receiving cavity capable of accommodating a transparent liquid; a detection part located in the receiving cavity, the detection part includes a cylindrical structure, a mounting shaft and a gland. The cylindrical structure has an open end and a closed end arranged opposite to each other. The gland is hermetically connected to the open end. The gland is provided with a mounting through hole. The mounting shaft is connected to the closed end and extends out through the mounting through hole. The mounting shaft is spaced from the inner wall of the mounting through hole. The mounting shaft, the gland and the cylindrical structure enclose a space for accommodating the mechanical seal; a liquid supply part located on one side of the detection part, the liquid supply part includes a box body and a liquid injection pipeline for communicating the inside of the box body and the inside of the cylindrical structure. The box body has a receiving cavity capable of accommodating a colored solution. A liquid injection pump is provided on the liquid injection pipeline to pump the colored solution in the receiving cavity into the cylindrical structure.

[0007] Furthermore, the box body is provided with a liquid injection port and a material discharge port connected to the interior of the box body, and the liquid supply part also includes: a driving motor, which is arranged in the box body; a stirring member, including a rotating shaft and a plurality of stirring rods connected to the outer periphery of the rotating shaft, the plurality of stirring rods are located in the box body, the rotating shaft is rotatably arranged relative to the box body, and the rotating shaft is drivingly connected to the driving motor.

[0008] Furthermore, a plurality of stirring rods are arranged at intervals along the circumferential direction and / or axial direction of the rotating shaft.

[0009] Furthermore, the detection device for mechanical seal also includes a reflux box and a reflux pipeline, a reflux valve is provided on the reflux pipeline, the inlet end of the reflux pipeline is connected to the cylindrical structure, the outlet end of the reflux pipeline is connected to the reflux box, the inlet end of the reflux pipeline is located at the bottom of the cylindrical structure, and the outlet end of the reflux pipeline is lower than the inlet end of the reflux pipeline.

[0010] Furthermore, the detection device for mechanical seal also includes a circulation pipeline for connecting the reflux box and the box body, and a circulation pump is provided on the circulation pipeline.

[0011] Furthermore, the detection box is provided with a drain pipe connected to the interior of the detection box, and the drain pipe is provided with a drain valve.

[0012] Furthermore, an annular mounting groove is provided on one side of the gland facing the cylindrical structure, and a sealing component is provided in the annular mounting groove.

[0013] Furthermore, the detection part also includes a plurality of fastening components arranged at intervals along the circumferential direction of the installation shaft, each fastening component passes through the gland and is connected to the cylindrical structure, and each fastening component is located on a side of the sealing component away from the installation shaft.

[0014] Furthermore, a liquid injection valve is provided on the liquid injection pipeline.

[0015] Furthermore, the mechanical seal detection device also includes a base, and the detection box and the liquid supply part are both installed on the base.

[0016] Applying the technical solution of the present utility model, the mechanical seal to be detected is sleeved on the outer periphery of the mounting shaft, the gland is sleeved on the outer periphery of the mechanical seal, and the gland and the cylindrical structure are hermetically connected, so that the mechanical seal is hermetically fitted with the outer wall of the mounting shaft and the inner wall of the mounting through-hole respectively. Then, a colored solution in the box body is introduced into the sealed chamber formed by the cylindrical structure, the mounting shaft, the mechanical seal and the gland through the liquid injection pipeline and the liquid injection pump until the sealed chamber is filled and the pressure in the sealed chamber reaches a set value. Then, water is injected into the detection box to submerge the mechanical seal, and detection is carried out. When the colored solution mixed in the sealed chamber leaks out from the sealing surface of the mechanical seal, it will enter the water in the detection box. In this way, the colored solution entering the transparent liquid can facilitate the detection personnel to quickly judge whether the sealed chamber is sealed, thus solving the problem that it is inconvenient for the detection personnel to judge due to the small leakage amount of the mechanical seal in the prior art, so as to check the sealing surface of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 shows a schematic structural diagram of an embodiment of the detection device for a mechanical seal of the present utility model;

[0019] Figure 2 shows Figure 1 a schematic structural diagram of the liquid supply part of the detection device for a mechanical seal;

[0020] Figure 3 shows Figure 2 a schematic structural diagram of the stirring member of the liquid supply part.

[0021] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0022] 1, base; 2, detection box; 3, drain pipe; 4, drain valve; 5, cylindrical structure; 6, mounting shaft; 7, mechanical seal; 8, gland; 9, fastening member; 10, liquid injection pipeline; 11, liquid injection valve; 12, liquid injection pump; 13, box body; 14, rotating shaft; 15, stirring rod; 16, driving motor; 17, liquid injection port; 18, discharge port; 19, circulation pipeline; 20, circulation pump; 21, return box; 22, return pipeline; 23, return valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] As Figures 1 to 3 shown, an embodiment of the present utility model provides a detection device for mechanical seals. The detection device for mechanical seals includes a detection box 2, a detection part, and a liquid supply part. Among them, the detection box 2 has a receiving cavity capable of accommodating a transparent liquid; the detection part is located in the receiving cavity, and the detection part includes a cylindrical structure 5, a mounting shaft 6, and a gland 8. The cylindrical structure 5 has an open end and a closed end arranged oppositely, the gland 8 is sealingly connected to the open end, the gland 8 is provided with a mounting through hole, the mounting shaft 6 is connected to the closed end and extends out through the mounting through hole, and the mounting shaft 6 is spaced from the inner wall of the mounting through hole. The mounting shaft 6, the gland, and the cylindrical structure 5 enclose a space for accommodating the mechanical seal; the liquid supply part is located on one side of the detection part, and the liquid supply part includes a box body 13 and a liquid injection pipeline 10 for communicating the inside of the box body 13 and the inside of the cylindrical structure 5. The box body 13 has a receiving cavity capable of accommodating a colored solution, and a liquid injection pump 12 is provided on the liquid injection pipeline 10 to pump the colored solution in the receiving cavity into the cylindrical structure 5.

[0025] In the above technical solution, the mechanical seal 7 to be detected is sleeved on the outer periphery of the mounting shaft 6, the gland 8 is sleeved on the outer periphery of the mechanical seal 7, and the gland 8 and the cylindrical structure 5 are sealingly connected, so that the mechanical seal 7 is sealingly fitted with the outer wall of the mounting shaft 6 and the inner wall of the mounting through hole respectively. Then, the colored solution in the box body 13 is introduced into the sealed chamber formed by the cylindrical structure 5, the mounting shaft 6, the mechanical seal 7, and the gland 8 through the liquid injection pipeline 10 and the liquid injection pump 12 until the sealed chamber is filled and the pressure in the sealed chamber reaches a set value. Then, water is injected into the detection box 2 to submerge the mechanical seal 7, and detection is carried out. When the mixed colored solution in the sealed chamber leaks out from the sealing surface of the mechanical seal 7, it will enter the water in the detection box 2. In this way, the colored solution entering the transparent liquid can facilitate the detection personnel to quickly judge whether the sealed chamber is sealed, thereby solving the problem that it is inconvenient for the detection personnel to judge due to the small leakage amount of the mechanical seal 7 in the existing detection device for mechanical seals, so as to check the sealing surface of the mechanical seal 7.

[0026] Preferably, in the embodiment of the present utility model, a sealing ring is provided between the mechanical seal 7 and the inner wall of the mounting through hole, and a sealing ring is also provided between the mechanical seal 7 and the outer wall of the mounting shaft 6, so that the inner wall of the mounting through hole and the outer wall of the mounting shaft 6 are respectively sealingly fitted with the mechanical seal 7, thereby avoiding the leakage between the mechanical seal 7 and the inner wall of the mounting through hole and between the mechanical seal 7 and the outer wall of the mounting shaft 6 from affecting the detection result.

[0027] As Figure 2As shown, in the embodiment of the present utility model, a liquid injection port 17 and a blanking port 18 communicating with the inside of the box body 13 are provided on the box body 13. The liquid supply part further includes: a driving motor 16 disposed on the box body 13; a stirring member including a rotating shaft 14 and a plurality of stirring rods 15 connected to the outer circumference of the rotating shaft 14. The plurality of stirring rods 15 are located inside the box body 13. The rotating shaft 14 is rotatably disposed relative to the box body 13, and the rotating shaft 14 is drivingly connected to the driving motor 16.

[0028] Through the above settings, water is injected into the box body 13 through the liquid injection port 17, and colored pigment is injected into the box body 13 through the blanking port 18. Then, the driving motor 16 is started to drive the rotation of the rotating shaft 14 to drive the rotation of the stirring rods 15, so that the colored pigment and water can be mixed together by the stirring rods 15 to form a colored solution. Then, the colored solution is injected into the sealed chamber by using the liquid injection pump 12 and the liquid injection pipeline 10.

[0029] Specifically, in the embodiment of the present utility model, one end of the rotating shaft 14 is rotatably connected to the bottom end of the box body 13, the other end of the rotating shaft 14 extends out of the top end of the box body 13 and is drivingly connected to the driving motor 16, and the rotating shaft 14 is rotatably connected to the top end of the box body 13.

[0030] As Figure 3 shown, in the embodiment of the present utility model, the plurality of stirring rods 15 are arranged at intervals along the circumferential and / or axial directions of the rotating shaft 14. In this way, the colored pigment and water can be mixed more uniformly together.

[0031] Preferably, in the embodiment of the present utility model, the plurality of stirring rods 15 are arranged at intervals along the circumferential and axial directions of the rotating shaft 14.

[0032] As Figure 1 shown, in the embodiment of the present utility model, the detection device for mechanical seal further includes a reflux box 21 and a reflux pipeline 22. A reflux valve 23 is provided on the reflux pipeline 22. The inlet end of the reflux pipeline 22 communicates with the cylindrical structure 5, the outlet end of the reflux pipeline 22 communicates with the reflux box 21, the inlet end of the reflux pipeline 22 is located at the bottom of the cylindrical structure 5, and the outlet end of the reflux pipeline 22 is lower than the inlet end of the reflux pipeline 22.

[0033] Through the above settings, after the detection is completed, the reflux valve 23 is opened, and under the action of gravity, the colored solution in the cylindrical structure 5 can flow into the reflux box 21 through the reflux pipeline 22. On the one hand, the colored solution can be recycled; on the other hand, the colored solution in the cylindrical structure 5 can be discharged to facilitate the removal of the mechanical seal 7.

[0034] As Figure 2 shown, in the embodiment of the present utility model, the detection device for mechanical seal further includes a circulation pipeline 19 for communicating the reflux box 21 and the box body 13, and a circulation pump 20 is provided on the circulation pipeline 19.

[0035] Through the above arrangement, the colored solution can be poured back into the box 13 through the circulation pump 20 and the circulation pipeline 19 to achieve the recycling of the colored solution.

[0036] like Figure 1 As shown, in the embodiment of the utility model, the detection box 2 is provided with a drain pipe 3 connected to the inside of the detection box 2, and the drain pipe 3 is provided with a drain valve 4. In this way, by opening the drain valve 4, the drain pipe 3 can drain the water in the detection box 2, so as to facilitate the next detection.

[0037] Specifically, in the embodiment of the utility model, a ring-shaped mounting groove is provided on the side of the gland 8 facing the cylindrical structure 5, and a sealing member is provided in the ring-shaped mounting groove. In this way, a sealing fit between the gland 8 and the cylindrical structure 5 can be achieved, thereby preventing leakage between the gland 8 and the cylindrical structure 5 from affecting the detection result.

[0038] like Figure 1 As shown, in the embodiment of the utility model, the detection part further includes a plurality of fastening members 9 arranged at intervals along the circumferential direction of the installation shaft 6, each fastening member 9 passes through the gland 8 and is connected to the cylindrical structure 5, and each fastening member 9 is located on the side of the sealing member away from the installation shaft 6. In this way, the gland 8 can be installed on the cylindrical structure 5, and the gland 8 can be pressed against the sealing member to achieve a sealed connection between the gland 8 and the cylindrical structure 5.

[0039] Preferably, in the embodiment of the present utility model, the mechanical seal 7 has a step surface, and the gland 8 is pressed tightly on the step surface.

[0040] Preferably, in the embodiment of the present utility model, the fastening member 9 is a fastening bolt, the fastening bolt is threadedly connected to the cylindrical structure 5, and the sealing member is a sealing ring.

[0041] like Figure 1 As shown, in the embodiment of the utility model, a liquid injection valve 11 is provided on the liquid injection pipeline 10. In this way, by opening or closing the liquid injection valve 11, the connection and disconnection between the box body 13 and the cylindrical structure 5 can be achieved.

[0042] like Figure 1 As shown, in the embodiment of the utility model, the detection device for mechanical seal further comprises a base 1, and the detection box 2 and the liquid supply part are both mounted on the base 1. In this way, the detection box 2 and the liquid supply part can be supported.

[0043] It should be noted that during use, the mechanical seal 7 is installed on the installation shaft 6, the gland 8 is covered, and the gland 8 and the cylindrical structure 5 are connected together through the fastening member 9, so that the mechanical seal 7, the installation shaft 6, the gland 8 and the cylindrical structure 5 enclose a sealed chamber. Then, water is injected into the box body 13 through the liquid injection port 17, and colored pigment is injected into the box body 13 through the blanking port 18. The driving motor 16 is started to drive the rotating shaft 14 to rotate, so as to drive the stirring rod 15 to rotate. The colored pigment and water are mixed together by the stirring rod 15 to form a colored solution. The liquid injection valve 11 is opened, the mixed colored solution is extracted by the liquid injection pump 12, and the colored solution is injected into the cylindrical structure 5 through the liquid injection pipeline 10 until the cylindrical structure 5 is filled with the colored solution. The internal pressure is set to the specified pressure value, and then water is injected into the detection box 2, and then the detection is carried out. When leakage occurs, the colored solution will leak into the water in the detection box 2, which is convenient for the detection personnel to quickly judge whether the seal is complete, solving the problem in the prior art that when the leakage amount of the pressurized liquid is small, the change of the pressure value is small, and it is not convenient for the detection personnel to judge whether there is leakage. After the detection is completed, the return valve 23 is opened, so that the colored solution in the cylindrical structure 5 flows into the return box 21, and then the colored solution can be poured back into the box body 13 through the circulation pump 20 and the circulation pipeline 19 to realize the recycling of the colored solution.

[0044] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the mechanical seal to be detected is sleeved on the outer periphery of the installation shaft, the gland is sleeved on the outer periphery of the mechanical seal, and the gland and the cylindrical structure are hermetically connected, so that the mechanical seal is hermetically fitted with the outer wall of the installation shaft and the inner wall of the installation through hole respectively. Then, the colored solution in the box body is introduced into the sealed chamber formed by the cylindrical structure, the installation shaft, the mechanical seal and the gland through the liquid injection pipeline and the liquid injection pump until the sealed chamber is filled and the pressure of the sealed chamber reaches the set value. Then, water is injected into the detection box to submerge the mechanical seal, and the detection is carried out. When the colored solution mixed in the sealed chamber leaks out from the sealing surface of the mechanical seal, it will enter the water in the detection box. In this way, the colored solution entering the transparent liquid can facilitate the detection personnel to quickly judge whether the sealed chamber is sealed, thus solving the problem in the prior art that it is not convenient for the detection personnel to judge when the leakage amount of the mechanical seal of the mechanical seal detection device is small, so as to check the sealing surface of the mechanical seal.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detection device for mechanical seal, characterized in that: include: The detection box (2) has a receiving cavity capable of receiving a transparent liquid; A detection part is located in the accommodating cavity, the detection part comprises a cylindrical structure (5), a mounting shaft (6) and a gland (8), the cylindrical structure (5) has an open end and a closed end arranged opposite to each other, the gland (8) is sealed and connected to the open end, a mounting through hole is provided on the gland (8), the mounting shaft (6) is connected to the closed end and extends through the mounting through hole, the mounting shaft (6) is spaced apart from the inner wall of the mounting through hole, and the mounting shaft (6), the gland (8) and the cylindrical structure (5) enclose a space for accommodating a mechanical seal; A liquid supply portion is located on one side of the detection portion, the liquid supply portion comprising a box (13) and a liquid injection pipeline (10) for connecting the interior of the box (13) and the interior of the tubular structure (5), the box (13) having a receiving cavity capable of receiving a colored solution, and the liquid injection pipeline (10) is provided with a liquid injection pump (12) for pumping the colored solution in the receiving cavity into the tubular structure (5).

2. The mechanical seal detection device according to claim 1, characterized in that: The box body (13) is provided with a liquid injection port (17) and a material discharge port (18) which are communicated with the interior of the box body (13), and the liquid supply part further comprises: A driving motor (16) is arranged in the box (13); The stirring member comprises a rotating shaft (14) and a plurality of stirring rods (15) connected to the outer periphery of the rotating shaft (14); the plurality of stirring rods (15) are located in the housing (13); the rotating shaft (14) is rotatably arranged relative to the housing (13); and the rotating shaft (14) is drivingly connected to the driving motor (16).

3. The mechanical seal detection device according to claim 2, characterized in that: The plurality of stirring rods (15) are arranged at intervals along the circumferential direction and / or axial direction of the rotating shaft (14).

4. The mechanical seal detection device according to any one of claims 1 to 3, characterized in that: The detection device for mechanical seal further comprises a reflux box (21) and a reflux pipeline (22); a reflux valve (23) is provided on the reflux pipeline (22); an inlet end of the reflux pipeline (22) is connected to the tubular structure (5); an outlet end of the reflux pipeline (22) is connected to the reflux box (21); the inlet end of the reflux pipeline (22) is located at the bottom of the tubular structure (5); and the outlet end of the reflux pipeline (22) is lower than the inlet end of the reflux pipeline (22).

5. The mechanical seal detection device according to claim 4, characterized in that: The mechanical seal detection device further comprises a circulation pipeline (19) for connecting the reflux box (21) and the box body (13), and a circulation pump (20) is provided on the circulation pipeline (19).

6. The mechanical seal detection device according to any one of claims 1 to 3, characterized in that: The detection box (2) is provided with a liquid discharge pipe (3) which is in communication with the interior of the detection box (2), and the liquid discharge pipe (3) is provided with a liquid discharge valve (4).

7. The mechanical seal detection device according to any one of claims 1 to 3, characterized in that: The gland (8) is provided with an annular mounting groove on one side facing the cylindrical structure (5), and a sealing component is provided in the annular mounting groove.

8. The mechanical seal detection device according to claim 7, characterized in that: The detection part also includes a plurality of fastening components (9) arranged at intervals along the circumference of the installation shaft (6), each of the fastening components (9) passes through the pressure cover (8) and is connected to the cylindrical structure (5), and each of the fastening components (9) is located on a side of the sealing component that is away from the installation shaft (6).

9. The mechanical seal detection device according to any one of claims 1 to 3, characterized in that: The liquid injection pipeline (10) is provided with a liquid injection valve (11).

10. The mechanical seal detection device according to any one of claims 1 to 3, characterized in that: The mechanical seal detection device further comprises a base (1), and the detection box (2) and the liquid supply part are both mounted on the base (1).

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