Mechanical seal device air tightness detection structure

Abstract

The utility model relates to mechanical seal technical field especially relates to a kind of mechanical seal device air-tightness detection structure, including base, the top of base is provided with detection shell, the inside of detection shell is provided with pivot, the outside of pivot is provided with mechanical seal main part, the front end of detection shell is provided with gland, the front end of gland is provided with colour-changing cloth, the top of base is provided with water tank, the outside of water tank is provided with inlet pipe;When detecting, detection shell is supported and fixed by base, mechanical seal main part is sleeved on pivot, mechanical seal main part is pressed in detection shell by gland, water in water tank is injected into detection shell by inlet pipe, drive pivot rotation drives mechanical seal main part synchronous operation, the air-tightness of mechanical seal main part is directly understood by observing colour-changing cloth color change, by the way of simulating actual working condition, air-tightness detection operation can be carried out under static, dynamic condition, detection operation is simple and convenient, and the accuracy of air-tightness detection is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a structure for detecting the airtightness of a mechanical seal device. Background Technology

[0002] Mechanical seals are key components of rotating equipment (such as pumps and compressors). To ensure the safe use of mechanical seals, the airtightness of the equipment needs to be tested during production. Airtightness testing can ensure good sealing performance, avoid leakage of toxic, flammable, explosive or corrosive media, and reduce the risk of safety accidents.

[0003] Most current airtightness testing structures operate under relatively simple conditions, often only allowing testing in static states. This limits their effectiveness and makes it difficult to test the airtightness of devices under dynamic operating conditions. Consequently, the test results may be inaccurate, affecting the quality control of sealing devices.

[0004] Therefore, given the limitations of existing testing structures due to their relatively simple testing conditions, a new airtightness testing structure for mechanical seal devices can be designed. This structure can simulate actual working conditions and perform airtightness testing under both static and dynamic conditions. The testing operation is simple and convenient, ensuring the production quality of the sealing device and effectively enhancing the accuracy of airtightness testing. Utility Model Content

[0005] To overcome the limitations of most airtightness testing structures, which have relatively simple testing conditions, limited testing effectiveness, difficulty in testing the airtightness of devices under dynamic operating conditions, and potentially inaccurate test results, thus affecting the quality control of sealing devices, this utility model is proposed.

[0006] The technical solution of this utility model is as follows: a mechanical seal device airtightness testing structure, including a base, a testing shell, a mechanical seal body, a rotating shaft, a pressure cap, a color-changing cloth, a water tank, a water inlet pipe, and a water return pipe. The testing shell is provided at the top of the base, the rotating shaft is provided inside the testing shell, the mechanical seal body is provided outside the rotating shaft, the pressure cap is provided at the front end of the testing shell, the color-changing cloth is provided at the front end of the pressure cap, the water tank is provided at the top of the base, the water inlet pipe is provided at one end of the outer side of the water tank, the other end of the water inlet pipe is connected to the top of the testing shell, the water return pipe is provided at the front end of the water tank, and the other end of the water return pipe is connected to the bottom of the front end of the testing shell.

[0007] Preferably, the test housing is fixed by setting a base, the installation position of the mechanical seal body is determined by a rotating shaft, the mechanical seal body is pressed into the test housing by a pressure cap, and water from the water tank is injected into the test housing through the water inlet pipe for static air tightness testing. The rotating shaft is driven to rotate synchronously, thereby testing the dynamic sealing effect of the mechanical seal body. The color-changing cloth changes color when it comes into contact with water, and the air tightness of the mechanical seal body can be intuitively understood by observing the color change of the color-changing cloth. The water in the test housing is drained back into the water tank through the return water pipe for water recycling. This allows for air tightness testing to be carried out under both static and dynamic conditions, making the testing operation simple and convenient, and enhancing the accuracy of air tightness testing.

[0008] Preferably, the rotating shaft is rotatably connected to the detection housing, the pressure cap is located at the front end of the stationary ring of the mechanical seal body, and the water tank is located below the detection housing.

[0009] Preferably, a drive motor is provided at the outer rear end of the detection housing, the output end of the drive motor is connected to the rotating shaft, and a first switch is provided at the outer rear end of the detection housing, which is electrically connected to the drive motor.

[0010] Preferably, the front end of the mechanical seal body is provided with multiple sets of locating pins distributed in an annular pattern at equal intervals, and the rear end of the gland is provided with multiple sets of locating blocks, the locating blocks and locating pins are positioned corresponding to each other, and the locating blocks and locating pins are fitted together.

[0011] Preferably, the outer side of the gland is provided with a mounting ring plate, which is rotatably connected to the gland. The inner side of the mounting ring plate is provided with a rotating ring. The outer side of the gland is provided with a ring groove, which is fitted and rotatably connected to the ring groove. The front end of the detection housing is provided with a mounting groove, and the inner side of the mounting ring plate is threaded and rotatably connected to the mounting groove.

[0012] Preferably, the water tank has a water inlet at the top and a drain pipe at the rear, with a first water valve on the outside of the drain pipe.

[0013] Preferably, a water pump is installed on the outside of the inlet pipe, a second switch is installed on the top of the base, the second switch is electrically connected to the water pump, and a second water valve is installed on the outside of the return pipe.

[0014] The beneficial effects of this utility model are:

[0015] During testing, the testing housing is fixed by the base support, the mechanical seal body is fitted onto the rotating shaft, and the mechanical seal body is pressed tightly inside the testing housing by the pressure cap. Water from the water tank is injected into the testing housing through the water inlet pipe to perform static airtightness testing. The rotating shaft is driven to rotate, causing the mechanical seal body to rotate synchronously, thus testing the dynamic sealing effect of the mechanical seal body. The color-changing cloth changes color when it comes into contact with water, and the airtightness of the mechanical seal body can be intuitively understood by observing the color change of the cloth. Finally, the water in the testing housing is drained back to the water tank through the return water pipe. This addresses the problem that most airtightness testing structures can only be tested in a static state, which limits the testing effect and makes it difficult to test the airtightness of the device under dynamic operating conditions, thereby improving the accuracy of airtightness testing. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of an airtightness testing structure for a mechanical seal device according to this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional structural diagram of the internal structure of the detection shell of a mechanical seal device airtightness detection structure according to this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural diagram of the detection shell of a mechanical seal device airtightness detection structure according to this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional cross-sectional view of the detection housing of a mechanical seal device airtightness detection structure according to this utility model.

[0020] Figure 5 The diagram shows a three-dimensional structure of the gland and mounting ring plate of the airtightness testing structure of a mechanical seal device according to this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Base; 2. Detection housing; 3. Rotating shaft; 301. Drive motor; 302. First switch; 4. Mechanical seal body; 401. Positioning pin; 5. Pressure cover; 501. Positioning block; 502. Mounting ring plate; 503. Rotating ring; 504. Ring groove; 505. Mounting groove; 6. Color-changing cloth; 7. Water tank; 701. Water inlet; 702. Drain pipe; 703. First water valve; 8. Water inlet pipe; 801. Water pump; 802. Second switch; 9. Return water pipe; 901. Second water valve. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figure 1 and Figure 2This utility model provides an embodiment: a mechanical seal device airtightness testing structure, including a base 1, a testing shell 2, a mechanical seal body 4, a rotating shaft 3, a pressure cap 5, a color-changing cloth 6, a water tank 7, a water inlet pipe 8, and a water return pipe 9. The testing shell 2 is provided at the top of the base 1. The rotating shaft 3 is provided on the inner side of the testing shell 2 and is rotatably connected to the testing shell 2. The mechanical seal body 4 is provided on the outer side of the rotating shaft 3. The pressure cap 5 is provided at the front end of the testing shell 2 and is located at the front end of the stationary ring of the mechanical seal body 4. The color-changing cloth 6 is provided at the front end of the pressure cap 5. The water tank 7 is provided at the top of the base 1 and is located below the testing shell 2. The water inlet pipe 8 is provided at one end of the outer side of the water tank 7 and is connected to the top of the testing shell 2 through the other end. The water return pipe 9 is provided at the front end of the water tank 7 and is connected to the bottom of the front end of the testing shell 2 through the other end.

[0024] Please see Figure 3 In this embodiment, a drive motor 301 is provided at the outer rear end of the detection housing 2. The output end of the drive motor 301 is connected to the rotating shaft 3. A first switch 302 is provided at the outer rear end of the detection housing 2. The first switch 302 is electrically connected to the drive motor 301. By pressing the first switch 302, the drive motor 301 can be flexibly controlled to run. The drive motor 301 drives the rotating shaft 3 to rotate, and the rotating shaft 3 performs dynamic sealing detection on the mechanical seal body 4.

[0025] Please see Figure 2 and Figure 5 In this embodiment, the front end of the mechanical seal body 4 is provided with multiple sets of locating pins 401 distributed in an annular pattern at equal intervals, and the rear end of the pressure cover 5 is provided with multiple sets of locating blocks 501. The locating blocks 501 correspond to the locating pins 401 and are fitted together. When installing the pressure cover 5, the locating blocks 501 are embedded into the locating pins 401 to ensure that the stationary ring of the mechanical seal body 4 is stationary and to prevent the stationary ring of the mechanical seal body 4 from rotating axially with the rotating shaft 3. The outer side of the pressure cover 5 is provided with an installation ring plate 502, which is connected to the pressure cover 5. The mounting ring 502 has a rotating ring 503 on its inner side and an annular groove 504 on its outer side. The rotating ring 503 and the annular groove 504 are fitted and rotated together. The front end of the detection housing 2 has a mounting groove 505. The inner side of the mounting ring 502 is threaded and rotated with the mounting groove 505. When the mounting ring 502 is rotated, the rotating ring 503 is driven to rotate synchronously along the annular groove 504, ensuring that the mounting ring 502 and the pressure cover 5 are stably rotated together. The mounting ring 502 is rotated along the mounting groove 505, thereby pressing the pressure cover 5 against the front end of the detection housing 2.

[0026] Please see Figure 1 and Figure 3In this embodiment, a water inlet 701 is provided at the top of the water tank 7, and a drain pipe 702 is provided at the rear end of the water tank 7. A first water valve 703 is provided on the outside of the drain pipe 702. Water is injected into the water tank 7 through the water inlet 701, and the opening and closing state of the drain pipe 702 is flexibly adjusted by rotating the first water valve 703, so that the water in the water tank 7 can be discharged through the drain pipe 702. A water pump 801 is provided on the outside of the water inlet pipe 8, and a second switch 802 is provided at the top of the base 1. The second switch 802 is electrically connected to the water pump 801. A second water valve 901 is provided on the outside of the return water pipe 9. The operation state of the water pump 801 is flexibly controlled by the second switch 802, and the water pump 801 is used to control the water in the water tank 7 to be pumped into the detection housing 2 through the water inlet pipe 8, thereby ensuring the effective implementation of the airtightness testing operation.

[0027] Before testing, water is poured into the water tank 7 of the base 1 through the water inlet 701. The mechanical seal body 4 is fitted onto the rotating shaft 3, and the pressure cover 5 is installed so that the positioning block 501 is embedded in the positioning pin 401 of the stationary ring of the mechanical seal body 4. At the same time, the mounting ring plate 502 is rotated along the mounting groove 505, which drives the rotating ring 503 to rotate along the ring groove 504, so that the pressure cover 5 presses the mechanical seal body 4 tightly into the test housing 2. At this time, the contact end of the rotating ring and the stationary ring of the mechanical seal body 4 are tightly fitted.

[0028] During static testing, press the second switch 802 to control the water pump 801 to run. Use the water pump 801 to control the water inlet pipe 8 to inject water from the water tank 7 into the test housing 2. At the same time, observe the color change of the color-changing cloth 6 to judge the airtightness of the mechanical seal body 4.

[0029] During dynamic testing, press the first switch 302 to control the drive motor 301 to run. The drive motor 301 drives the rotating shaft 3 to rotate and drive the mechanical seal body 4 to rotate synchronously. The dynamic sealing effect of the mechanical seal body 4 is tested. Similarly, the air tightness of the mechanical seal body 4 is judged by observing the color change of the color-changing cloth 6.

[0030] Finally, turn the second water valve 901 to open the return water pipe 9, and drain the water in the detection housing 2 back to the water tank 7 through the return water pipe 9 for subsequent recycling. After a period of time, turn the first water valve 703 to open the drain pipe 702, and drain the water in the water tank 7 through the drain pipe 702, and then inject clean water back into the water tank 7 through the water inlet 701.

[0031] Through the above steps, the base 1 supports and fixes the test housing 2, the rotating shaft 3 clarifies the installation position of the mechanical seal body 4, the pressure cap 5 presses the mechanical seal body 4 into the test housing 2, and the water in the water tank 7 is injected into the test housing 2 through the water inlet pipe 8 to perform static air tightness testing. The rotating shaft 3 is driven to rotate, causing the mechanical seal body 4 to rotate synchronously, thus testing the dynamic sealing effect of the mechanical seal body 4. The color-changing cloth 6 changes color when it comes into contact with water. By observing the color change of the color-changing cloth 6, the air tightness of the mechanical seal body 4 can be intuitively understood. The water in the test housing 2 is drained back into the water tank 7 through the return water pipe 9 for water recycling. Thus, air tightness testing can be carried out under both static and dynamic working conditions, and the testing operation is simple and convenient.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A mechanical seal device air tightness detection structure, comprising a base (1), a detection shell (2) and a mechanical seal main body (4), characterized in that: It also includes a rotating shaft (3), a pressure cap (5), a color-changing cloth (6), a water tank (7), an inlet pipe (8), and a return pipe (9). The top of the base (1) is provided with a detection shell (2), the inner side of the detection shell (2) is provided with a rotating shaft (3), the outer side of the rotating shaft (3) is provided with a mechanical seal body (4), the front end of the detection shell (2) is provided with a pressure cap (5), the front end of the pressure cap (5) is provided with a color-changing cloth (6), the top of the base (1) is provided with a water tank (7), one end of the outer side of the water tank (7) is provided with an inlet pipe (8), the other end of the inlet pipe (8) is connected to the top of the detection shell (2), the front end of the water tank (7) is provided with a return pipe (9), the other end of the return pipe (9) is connected to the bottom of the front end of the detection shell (2).

2. The airtightness detection structure for a mechanical seal device according to claim 1, characterized in that: The rotating shaft (3) is rotatably connected to the detection housing (2), the pressure cap (5) is set at the front end of the stationary ring of the mechanical seal body (4), and the water tank (7) is set below the detection housing (2).

3. The airtightness detection structure for a mechanical seal device according to claim 1, characterized in that: A drive motor (301) is provided at the outer rear end of the detection housing (2). The output end of the drive motor (301) is connected to the rotating shaft (3). A first switch (302) is provided at the outer rear end of the detection housing (2). The first switch (302) is electrically connected to the drive motor (301).

4. The airtightness detection structure for a mechanical seal device according to claim 1, characterized in that: The front end of the mechanical seal body (4) is provided with multiple sets of locating pins (401) distributed in an annular pattern at equal intervals, and the rear end of the gland (5) is provided with multiple sets of locating blocks (501). The locating blocks (501) correspond to the locating pins (401) and are fitted together.

5. The airtightness testing structure for a mechanical seal device according to claim 1, characterized in that: An mounting ring plate (502) is provided on the outer side of the pressure cover (5), and the mounting ring plate (502) is rotatably connected to the pressure cover (5). A rotating ring (503) is provided on the inner side of the mounting ring plate (502). An annular groove (504) is provided on the outer side of the pressure cover (5). The rotating ring (503) is fitted and rotatably connected to the annular groove (504). An installation groove (505) is provided at the front end of the detection housing (2). The inner side of the mounting ring plate (502) is rotatably connected to the installation groove (505) by a thread.

6. The airtightness detection structure for a mechanical seal device according to claim 1, characterized in that: The top of the water tank (7) is provided with a water inlet (701), and the rear end of the water tank (7) is provided with a drain pipe (702). A first water valve (703) is provided on the outside of the drain pipe (702).

7. The airtightness testing structure for a mechanical seal device according to claim 1, characterized in that: A water pump (801) is installed on the outside of the water inlet pipe (8), a second switch (802) is installed on the top of the base (1), the second switch (802) is electrically connected to the water pump (801), and a second water valve (901) is installed on the outside of the return water pipe (9).

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