Mechanical seal flushing device capable of automatically adjusting flushing pressure

Abstract

The utility model relates to the technical field of mechanical seal flushing devices, and discloses a mechanical seal flushing device capable of automatically adjusting flushing pressure, which comprises a pump shell, a mechanical seal, a filter, a water tank, a booster pump and a water inlet pipe, a mounting groove matched with the mounting block is formed in the top of the adjusting box; according to the mechanical seal flushing device capable of automatically adjusting the flushing pressure, the inclination angles of the two semicircular discs can be changed through rotation of the rotating rod, so that the flushing pressure is adjusted, when a mechanical seal needs to be strongly flushed, the semicircular discs can be in a vertical state, and only the semicircular discs need to be in an inclined state at ordinary times; therefore, not only can the loss of the cleaning fluid be effectively reduced, but also the mechanical seal can be effectively prevented from being flushed by relatively large flushing pressure for a long time, so that a relatively good protection effect on the mechanical seal is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical seal flushing devices, specifically a mechanical seal flushing device that automatically adjusts the flushing pressure. Background Technology

[0002] In the chemical industry, rinsing usually refers to water rinsing. Before putting equipment and pipelines with liquid working media into use, they are generally rinsed with clean water to remove welding slag and other debris from the pipeline. In centrifugal pumps, the mechanical seal is a device that seals the gap between the centrifugal pump shaft and the pump casing. During the use of the mechanical seal, impurities of the medium transported by the centrifugal pump will accumulate inside the mechanical seal. In order to prevent the accumulation of impurities, the mechanical seal is rinsed during operation. At the same time, rinsing the mechanical seal can also reduce the temperature of the mechanical seal and prevent deformation of the mechanical seal under long-term friction. However, some mechanical seal devices use external circulating water to rinse the mechanical seal. These rinsing devices do not have heat dissipation function, which causes the temperature of the cleaning fluid to rise during the rinsing process, reducing the cooling effect on the mechanical seal and making it unfavorable for long-term operation of the mechanical seal.

[0003] In the prior art, such as the novel flushing device proposed in announcement number CN219388271 U, this technical solution discloses a novel flushing device, including a pump casing, a mechanical seal installed inside the pump casing, a water tank fixedly installed on the side of the pump casing, a flushing mechanism installed on the pump casing, and a heat dissipation mechanism installed on the water tank; the flushing mechanism includes an outlet pipe, an inlet pipe, a booster pump, and a flushing tank, the flushing tank being annular and located inside the pump casing, the flushing tank being located outside the mechanical seal, the two ends of the inlet pipe being connected to the outlet on the lower side of the water tank and the inlet on the side of the pump casing, the inlet on the pump body being connected to the flushing tank. This novel flushing device can lower the temperature of the cleaning fluid, allowing the cleaning fluid to be delivered to the pump casing at a consistently low temperature to flush the mechanical seal, thereby lowering the operating temperature of the mechanical seal and ensuring that the mechanical seal operates at a consistently low temperature, preventing the rubber sealing ring on the mechanical seal from aging and deforming, and improving the service life of the mechanical seal on the centrifugal pump;

[0004] However, existing mechanical seal flushing devices cannot automatically adjust the flushing pressure, which results in a large loss of cleaning fluid when flushing the mechanical seal. Furthermore, using high flushing pressure for a long time may damage the mechanical seal and affect its service life.

[0005] To address the aforementioned issues, this application proposes a mechanical seal flushing device that automatically adjusts the flushing pressure. Utility Model Content

[0006] This utility model aims to provide a mechanical seal flushing device that automatically adjusts the flushing pressure. It is mainly used to solve the problem that existing mechanical seal flushing devices cannot automatically adjust the flushing pressure, which leads to a large loss of cleaning fluid when flushing the mechanical seal. Moreover, using a large flushing pressure for a long time may damage the mechanical seal and affect its service life.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] An automatic pressure-adjusting mechanical seal flushing device includes a pump housing, a mechanical seal, a filter, a water tank, a booster pump, and an inlet pipe. An adjustment box is fixedly connected to the top of the outer wall of the pump housing. A mounting block is fixedly connected to the end of the inlet pipe away from the booster pump. The top of the adjustment box has a mounting groove that matches the mounting block. The mounting block is equipped with a limiting component for fixing the mounting block inside the mounting groove. A rotating rod is rotatably connected inside the adjustment box. A cavity is opened inside the adjustment box. A servo motor is fixedly installed inside the cavity. One end of the rotating rod extends into the cavity and is fixedly connected to the output end of the servo motor. Symmetrical semi-circular disks are fixedly connected to the outer wall of the rotating rod.

[0009] The working principle and beneficial effects of this utility model:

[0010] 1. Working Principle: When using this device, insert the mounting block at one end of the inlet pipe into the mounting groove at the top of the adjusting box. The mounting block is then fixed inside the mounting groove by the limiting component. The device operates normally once the power is connected. (By adding a pump, the cleaning fluid at the bottom of the water tank can be transported through the inlet pipe to the rinsing tank, allowing the cleaning fluid to flow through the rinsing tank and contact the mechanical seal, carrying away impurities and heat from the machinery. After rinsing, the cleaning fluid flows from the outlet pipe into the water distribution plate and the heat-conducting pipes. The cooling fan then allows external air to flow through the gaps between the heat-conducting pipes, carrying away heat from the pipes.) The temperature of the cleaning fluid is lowered so that it can be delivered to the pump casing at a lower temperature to flush the mechanical seal. (The part in parentheses refers to prior art, which is not described in detail in this application.) During the operation of this device, the servo motor is started, which causes the rotating rod to rotate. As the rotating rod rotates, the flushing pressure can be adjusted through two semi-circular discs set on its outer wall. When the two semi-circular discs are kept horizontal, the arc-shaped edge of the semi-circular discs will abut against the inner wall of the adjustment box, thus preventing the cleaning fluid from entering the flushing tank. The rotation of the rotating rod can increase the tilt angle of the semi-circular discs. The larger the tilt angle of the semi-circular discs, the greater the flushing pressure.

[0011] 2. Beneficial Effects: During operation, the device uses a servo motor to drive a rotating rod. This rotation changes the tilt angle of the two semi-circular discs, thus adjusting the flushing pressure. When the two semi-circular discs are horizontal, cleaning fluid cannot enter the flushing tank. Rotating the rod increases the tilt angle of the semi-circular discs; a larger tilt angle results in greater flushing pressure. For powerful flushing of the mechanical seal, the semi-circular discs can be kept vertical. Normally, they only need to be tilted. This effectively reduces cleaning fluid consumption and avoids prolonged high-pressure flushing of the mechanical seal, thus protecting it and extending its service life.

[0012] Preferably, the limiting component includes sliding cavities on both sides of the mounting block. Limiting blocks are slidably connected inside each sliding cavity. One side of each limiting block extends out of the sliding cavity, and a spring is fixedly connected to the other side. The other end of the spring is fixedly connected to the inner wall of the sliding cavity. Limiting grooves matching the limiting blocks are opened on both sides of the adjusting box. Buttons are slidably connected inside each limiting groove. One side of the button abuts against the limiting block, and the other side extends out of the limiting groove. By pressing the limiting blocks on both sides of the mounting block, it moves into the sliding cavity. Then, the mounting block can be inserted into the mounting groove. Once the mounting block is fully inside the mounting groove, the limiting block will pop out under the action of the spring and engage with the limiting groove, thus fixing the mounting block inside the mounting groove. By pressing the buttons on both sides of the adjusting box, the limiting blocks can be pushed into the sliding cavity. When the limiting blocks disengage from the limiting groove, pulling the water inlet pipe will disengage the mounting block from the mounting groove. This facilitates maintenance of the device by the operator.

[0013] Preferably, rubber strips are fixedly connected to the arc-shaped edges of the semicircular disk. Since rubber material has a good sealing effect, when the semicircular disk is in a horizontal state, the rubber strips set on the arc-shaped edges of the semicircular disk abut against the inner wall of the adjusting box, which can achieve a better sealing effect.

[0014] Preferably, sliders are fixedly connected to both sides of the button, and the inner wall of the limiting groove is provided with a sliding groove that matches the slider. When the button slides inside the limiting groove, the sliders on both sides of the button and the sliding groove on the inner wall of the limiting groove can play a good limiting and guiding role for the button. This not only makes the button more stable when sliding inside the limiting groove, but also effectively prevents the button from leaving the inside of the limiting groove.

[0015] Preferably, the corner of the bottom of the side of the limiting block extending out of the sliding cavity is set as an inclined surface. By setting the corner of the bottom of the side of the limiting block extending out of the sliding cavity as an inclined surface, when the operator inserts the installation block into the installation groove, the inclined surface on one side of the limiting block will automatically slide into the sliding cavity due to the pressure of the inner wall of the installation groove, without the need for manual pressing of the limiting block to move it. This makes it more convenient to insert the installation block into the installation groove.

[0016] Preferably, a sealing gasket is fixedly connected to the bottom of the mounting block. The sealing gasket can be made of rubber material. The advantage of this design is that it allows for a better seal after the mounting block is inserted into the mounting groove.

[0017] Preferably, all corners at the top of the inner wall of the mounting groove are chamfered. By setting all corners at the top of the inner wall of the mounting groove to be chamfered, it is easier to insert the mounting block into the mounting groove. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0019] Figure 2 This is a partially enlarged cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a top view cross-sectional structural diagram of the limiting component of this utility model;

[0021] Figure 4 This is a top view cross-sectional structural diagram of the adjustment box of this utility model.

[0022] In the diagram: 1. Pump casing; 2. Mechanical seal; 3. Filter; 4. Water tank; 5. Booster pump; 6. Inlet pipe; 7. Mounting block; 8. Mounting groove; 9. Rotating rod; 10. Cavity; 11. Servo motor; 12. Semi-circular disc; 13. Slide cavity; 14. Limit block; 15. Spring; 16. Limit groove; 17. Button; 18. Slider; 19. Slide groove; 20. Rubber strip; 21. Sealing gasket; 22. Adjustment box. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4The automatic pressure adjustment mechanical seal flushing device includes a pump housing 1, a mechanical seal 2, a filter 3, a water tank 4, a booster pump 5, and an inlet pipe 6. The booster pump 5 delivers the cleaning fluid from the bottom of the water tank 4 to the flushing tank through the inlet pipe 6. The cleaning fluid flows through the flushing tank and contacts the mechanical seal 2, carrying away impurities and heat from the machine. After flushing, the cleaning fluid flows back to the water tank 4 through the filter 3 via the outlet pipe. An adjustment box 22 is fixedly connected to the top of the outer wall of the pump housing 1, allowing for counter-flushing. For adjusting the washing pressure, a mounting block 7 is fixedly connected to the end of the water inlet pipe 6 away from the booster pump 5. The top of the adjusting box 22 has a mounting groove 8 that matches the mounting block 7. The corners at the top of the inner wall of the mounting groove 8 are chamfered, making it easier to insert the mounting block 7 into the groove. The mounting block 7 is equipped with a limiting component to fix it inside the mounting groove 8. When the mounting block 7 at one end of the water inlet pipe 6 is inserted into the mounting groove 8 at the top of the adjusting box 22, the limiting component fixes the mounting block 7 in place. Internally, the device operates normally once the power is connected. A sealing gasket 21 is fixedly connected to the bottom of the mounting block 7, ensuring a better seal after the mounting block 7 is inserted into the mounting groove 8. A rotating rod 9 is rotatably connected inside the adjusting box 22. A cavity 10 is formed inside the adjusting box 22, and a servo motor 11 is fixedly installed inside the cavity 10. One end of the rotating rod 9 extends into the cavity 10 and is fixedly connected to the output end of the servo motor 11. Symmetrical semicircular disks 12 are fixedly connected to the outer wall of the rotating rod 9, and the arc edges of the semicircular disks 12 are all fixedly connected. A rubber strip 20 is fixedly connected. During the operation of the device, the servo motor 11 is started, and the servo motor 11 can rotate the rotating rod 9. While the rotating rod 9 is rotating, the rinsing pressure can be adjusted through the two semi-circular disks 12 set on its outer wall. When the two semi-circular disks 12 are kept horizontal, the rubber strip 20 on the semi-circular disks 12 will abut against the inner wall of the adjustment box 22, so that the cleaning liquid cannot enter the rinsing tank. The rotation of the rotating rod 9 can increase the tilt angle of the semi-circular disks 12. The larger the tilt angle of the semi-circular disks 12, the greater the rinsing pressure.

[0025] like Figure 2 and Figure 3As shown, the limiting assembly includes sliding cavities 13 on both sides of the mounting block 7. Limiting blocks 14 are slidably connected inside each sliding cavity 13. One side of the limiting block 14 extends out of the sliding cavity 13, and a spring 15 is fixedly connected to the other side. The other end of the spring 15 is fixedly connected to the inner wall of the sliding cavity 13. The bottom corner of the side of the limiting block 14 extending out of the sliding cavity 13 is sloped. Limiting grooves 16 matching the limiting blocks 14 are provided on both sides of the adjusting box 22. Buttons 17 are slidably connected inside each limiting groove 16. Slider blocks 18 are fixedly connected to both sides of each button 17. A sliding groove 19 matching the slider 18 is provided on the inner wall of the limiting groove 16. One side of the button 17 is connected to the limiting block... The device is designed with 14 opposing each other, and a limiting groove 16 extends from the other side. When the operator inserts the mounting block 7 into the mounting groove 8, the inclined surface on one side of the limiting block 14 will automatically slide into the sliding cavity 13 due to the pressure from the inner wall of the mounting groove 8. Once the mounting block 7 is fully inside the mounting groove 8, the limiting block 14 will pop out under the action of the spring 15 and engage with the limiting groove 16, thus fixing the mounting block 7 inside the mounting groove 8. By pressing the buttons 17 on both sides of the adjusting box 22, the limiting block 14 can be pushed into the sliding cavity 13. When the limiting block 14 is disengaged from the limiting groove 16, pulling the water inlet pipe 6 will disengage the mounting block 7 from the mounting groove 8, which makes it convenient for the operator to inspect and maintain the device.

[0026] As can be seen from the above, the specific embodiments of this utility model are as follows:

[0027] When using this device, insert the mounting block 7 at one end of the inlet pipe 6 into the mounting groove 8 at the top of the adjusting box 22. The inclined surface on one side of the limiting block 14 will automatically slide into the sliding cavity 13 under the pressure of the inner wall of the mounting groove 8. The mounting block 7 will be fully inserted into the mounting groove 8. The limiting block 14 will pop out under the action of the spring 15 and engage with the limiting groove 16, thus fixing the mounting block 7 inside the mounting groove 8. The device can then be powered on to operate normally. (By adding a pump, the cleaning fluid at the bottom of the water tank can be transported to the flushing tank through the inlet pipe, allowing the cleaning fluid to flow through the flushing tank and contact the mechanical seal, carrying away impurities and heat from the mechanical seal. After flushing, the cleaning fluid will flow from the outlet pipe into the water distribution plate and the heat conduction pipe. Through the operation of the cooling fan, external air flows through the gaps between the heat conduction pipes, carrying away the heat from the heat conduction pipes, thereby lowering the temperature of the cleaning fluid. This allows the cleaning fluid to be delivered to the pump casing at a lower temperature to flush the mechanical seal.) The part in parentheses represents prior art, which is not described in detail in this application. During the operation of this device, the servo motor 11 is started by the controller. The operation of the servo motor 11 causes the rotating rod 9 to rotate. While the rotating rod 9 rotates, the flushing pressure can be adjusted by the two semi-circular disks 12 set on its outer wall. When the two semi-circular disks 12 are kept horizontal, the rubber strips 20 on the semi-circular disks 12 will abut against the inner wall of the adjustment box 22, so that the cleaning fluid cannot enter the flushing tank. The rotation of the rotating rod 9 can increase the tilt angle of the semi-circular disks 12. The larger the tilt angle of the semi-circular disks 12, the greater the flushing pressure. When a strong flush is needed for the mechanical seal 2, the semi-circular disks 12 can be made to be in a vertical state. Normally, the semi-circular disks 12 only need to be made to be in a tilted state. This can not only effectively reduce the loss of cleaning fluid, but also effectively avoid flushing the mechanical seal 2 with high flushing pressure for a long time, thereby playing a better protective role for the mechanical seal 2 and effectively extending the service life of the mechanical seal 2.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanical seal flushing device that automatically adjusts the flushing pressure, comprising a pump housing (1), a mechanical seal (2), a filter (3), a water tank (4), a booster pump (5), and a water inlet pipe (6), characterized in that, The top of the outer wall of the pump shell (1) is fixedly connected with an adjusting box (22), the end of the water inlet pipe (6) away from the booster pump (5) is fixedly connected with a mounting block (7), the top of the adjusting box (22) is provided with a mounting groove (8) matched with the mounting block (7), the mounting block (7) is provided with a limiting assembly for fixing the mounting block (7) in the mounting groove (8), the inside of the adjusting box (22) is rotatably connected with a rotating rod (9), the inside of the adjusting box (22) is provided with a cavity (10), the inside of the cavity (10) is fixedly installed with a servo motor (11), one end of the rotating rod (9) extends into the cavity (10) and is fixedly connected with the output end of the servo motor (11), and the outer wall of the rotating rod (9) is fixedly connected with symmetrical semicircular discs (12).

2. The mechanically sealed flush device that automatically adjusts the flush pressure according to claim 1, wherein: The limiting assembly comprises slide cavities (13) formed on both sides of the mounting block (7), the slide cavities (13) are slidably connected with limiting blocks (14) inside, one side of the limiting block (14) extends out of the slide cavity (13), the other side is fixedly connected with a spring (15), the other end of the spring (15) is fixedly connected with the inner wall of the slide cavity (13), both sides of the adjusting box (22) are provided with limiting grooves (16) matched with the limiting blocks (14), the limiting grooves (16) are slidably connected with buttons (17) inside, one side of the button (17) is arranged in abutment with the limiting block (14), and the other side extends out of the limiting groove (16).

3. The mechanically sealed flush device that automatically adjusts the flush pressure of claim 1, wherein: The arc-shaped edges of the semicircular discs (12) are fixedly connected with rubber strips (20).

4. The mechanically sealed flush device that automatically adjusts the flush pressure of claim 2, wherein: Both sides of the button (17) are fixedly connected with sliding blocks (18), and the inner wall of the limiting groove (16) is provided with sliding grooves (19) matched with the sliding blocks (18).

5. The mechanically sealed flush device that automatically adjusts the flush pressure of claim 2, wherein: The corner at the bottom of the side, to which the limiting block (14) extends out of the slide cavity (13), is provided in a slope.

6. The mechanically sealed flush device that automatically adjusts the flush pressure of claim 1, wherein: The bottom of the mounting block (7) is fixedly connected with a sealing gasket (21).

7. The mechanically sealed flush device that automatically adjusts the flush pressure of claim 1, wherein: The corners at the top of the inner wall of the mounting groove (8) are all provided in a chamfer.

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