Flow and pressure adjustable multi-mechanical-seal flushing system for nano sand mill

Abstract

The utility model relates to the technical field of nano sand mills, and discloses a flow and pressure adjustable multi-mechanical seal flushing system of a nano sand mill, which comprises a mounting plate, a main shaft mechanical seal, a separation shaft mechanical seal and a liquid outlet mechanical seal, a machine seal liquid supply distribution pipe and a machine seal liquid return distribution pipe are fixedly installed on one side of the installation plate, and the machine seal liquid supply distribution pipe is located below the machine seal liquid return distribution pipe. According to the utility model, the gas pressure regulating valve is regulated to ensure that the pressure transmitter displays a pressure value of about 0.2 Mpa, then the circulating pump is started to work, and the pressure value of the pressure gauge is regulated to 0.5 Mpa through the regulating valve, so that the rotating speeds of the three flow sight glasses are the same, thereby realizing the regulation of flow and pressure, reducing the cost of equipment and the difficulty of a control system, and improving the working efficiency. And reliable operation of the mechanical seal is facilitated, the situation of failure of the mechanical seal is avoided, and the mechanical seal is practical and suitable for wide application and popularization.

Description

Technical Field

[0001] The utility model belongs to the technical field of nanometer sand mills, and in particular relates to a nanometer sand mill multi-machine seal flushing system with adjustable flow and pressure. Background Art

[0002] Nano sand mill is a device used for dispersing various viscosity products and grinding nano-level materials. The dynamic solid-liquid separation of zirconium beads in nano sand mill uses the drag of high-speed motors to separate large-mass materials from zirconium beads and product slurry under the action of centrifugal force. Compared with traditional screen separation, dynamic separation has higher separation efficiency and is not easy to block materials, which improves the production utilization rate of sand mill. However, because the dynamic separation mechanism adds two mechanical seals, plus the spindle mechanical seal, there are a total of three sets of mechanical seals, so the uniformity of the flow rate and pressure distribution of the mechanical seal flushing liquid is higher. More precise flow control can ensure the high reliability of mechanical seal operation.

[0003] A mechanical seal is a device that prevents fluid leakage by having at least one pair of end faces perpendicular to the axis of rotation, which remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal. A mechanical seal flushing system is a device that injects fluid into the gap of a mechanical seal to form a certain flow rate and flow rate, and physically separates the friction surface of the mechanical seal from the coolant, thereby effectively reducing the temperature and friction coefficient of the friction surface, improving the sealing effect of the mechanical seal, and reducing leakage. The current technical solution is to have a separate mechanical seal flushing system for each mechanical seal, and the flow rate and pressure cannot be adjusted. This design will greatly increase the cost of the equipment and the difficulty of the control system, which is not conducive to the reliability of the mechanical seal operation and often causes mechanical seal failures.

[0004] In view of this, the utility model is provided to solve the above problems by providing a nano sand mill multi-machine seal flushing system with adjustable flow and pressure. Utility Model Content

[0005] In order to solve the technical problem that each mechanical seal has a separate mechanical seal flushing system, and the flow rate and pressure cannot be adjusted, such a design will greatly increase the cost of the equipment and the difficulty of the control system, which is not conducive to the reliability of the mechanical seal operation and often causes mechanical seal failure, the basic concept of the technical solution adopted by the utility model is:

[0006] A nano sand mill multi-machine seal flushing system with adjustable flow and pressure, comprising a mounting plate, a main shaft machine seal, a separation shaft machine seal and a liquid outlet machine seal, wherein a buffer tank and a circulating pump are fixedly mounted on both sides of the mounting plate, and a machine seal liquid supply distribution pipe and a machine seal return liquid distribution pipe are fixedly mounted on one side of the mounting plate, wherein the machine seal liquid supply distribution pipe is located below the machine seal return liquid distribution pipe, the machine seal liquid supply distribution pipe is connected to the liquid outlet of the buffer tank, the machine seal return liquid distribution pipe is connected to the liquid inlet of the buffer tank, three equidistantly distributed three-way interfaces are arranged at the bottom of the machine seal return liquid distribution pipe, and the three-way interfaces are all connected with a regulating valve, a flow sight glass and a return liquid interface, the return liquid pipes of the main shaft machine seal, the separation shaft machine seal and the liquid outlet machine seal are respectively connected to the return liquid interfaces equidistantly arranged at the bottom of the machine seal return liquid distribution pipe, the machine seal liquid supply distribution pipe is connected to the machine seal return liquid distribution pipe through a bypass pipeline and a ball valve, and the ball valve is arranged on the bypass pipeline.

[0007] As a preferred embodiment of the utility model, a temperature transmitter is arranged on the top of the mechanical seal return liquid distribution pipe.

[0008] As a preferred embodiment of the utility model, a pressure gauge is arranged at the top of the mechanical seal liquid supply distribution pipe, and three equidistantly distributed liquid supply interfaces are arranged at the bottom of the mechanical seal liquid supply distribution pipe.

[0009] As a preferred embodiment of the utility model, three liquid supply interfaces equidistantly arranged at the bottom of the mechanical seal liquid supply distribution pipe are respectively connected to the liquid inlets of the main shaft mechanical seal, the separation shaft mechanical seal and the liquid outlet mechanical seal.

[0010] As a preferred embodiment of the utility model, a pressure transmitter, a safety valve, a liquid injection funnel and a gas injection port are arranged on the top of the buffer tank, a gas pressure regulating valve is arranged on one side of the buffer tank, and the gas injection port is connected to the gas pressure regulating valve.

[0011] As a preferred embodiment of the present utility model, two liquid level switches are arranged on the side of the middle part of the buffer tank.

[0012] As a preferred embodiment of the utility model, a cooling water supply interface, a cooling water return interface and a drain valve are provided at the bottom of the buffer tank.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model makes all system components into integrated modules and fixes them on a common mounting plate for protection. When the system is running, flushing liquid is added to the buffer tank to the highest liquid level through the liquid injection funnel, and then the valve of the gas injection port is opened, and the gas pressure regulating valve is adjusted to ensure that the pressure transmitter displays a pressure value of about 0.2Mpa, and then the circulation pump is started, and the pressure value of the pressure gauge is adjusted to 0.5Mpa through the regulating valve respectively, so that the rotation speeds of the three flow sight glasses are the same, thereby realizing the regulation of flow and pressure, reducing the cost of the equipment and the difficulty of the control system, being conducive to the reliable operation of the mechanical seal, and avoiding the occurrence of mechanical seal failure.

[0015] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached picture:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 3 This is a side view of the structure of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the connection structure of the main shaft mechanical seal, the separation shaft mechanical seal, the liquid outlet mechanical seal and the buffer tank.

[0021] In the figure: 1. Buffer tank; 2. Circulation pump; 3. Mounting plate; 4. Mechanical seal liquid supply distribution pipe; 5. Mechanical seal liquid return distribution pipe; 6. Control valve; 7. Flow sight glass; 8. Pressure transmitter; 9. Temperature transmitter; 10. Safety valve; 11. Liquid supply interface; 12. Liquid return interface; 13. Pressure gauge; 14. Gas pressure regulating valve; 15. Liquid level switch; 16. Liquid filling funnel; 17. Gas injection port; 18. Cooling water supply interface; 19. Cooling return water interface; 20. Drain valve; 21. Spindle mechanical seal; 22. Separation shaft mechanical seal; 23. Liquid outlet mechanical seal; 24. Bypass pipeline; 25. Ball valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0023] like Figures 1 to 4 As shown:

[0024] A nano sand mill multi-machine seal flushing system with adjustable flow and pressure, comprising a mounting plate 3, a main shaft machine seal 21, a separation shaft machine seal 22 and a liquid outlet machine seal 23, all system components are made into an integrated module and fixed on a common mounting plate 3 for protection, a buffer tank 1 and a circulating pump 2 are fixedly installed on both sides of the mounting plate 3, a machine seal liquid supply distribution pipe 4 and a machine seal return liquid distribution pipe 5 are fixedly installed on one side of the mounting plate 3, the machine seal liquid supply distribution pipe 4 is located below the machine seal return liquid distribution pipe 5, the machine seal liquid supply distribution pipe 4 is connected to the liquid outlet of the buffer tank 1, and the machine seal return liquid distribution pipe 5 is connected to the liquid outlet of the buffer tank 1. Connected to the liquid inlet of the buffer tank 1, the bottom of the machine seal return liquid distribution pipe 5 is provided with three equidistantly distributed three-way interfaces, and the three-way interfaces are all connected with a regulating valve 6, a flow sight glass 7 and a return liquid interface 12. The return liquid pipes of the main shaft machine seal 21, the separation shaft machine seal 22 and the liquid outlet machine seal 23 are respectively connected to the return liquid interfaces 12 equidistantly arranged at the bottom of the machine seal return liquid distribution pipe 5. The machine seal liquid supply distribution pipe 4 is connected to the machine seal return liquid distribution pipe 5 through a bypass line 24 and a ball valve 25. The ball valve 25 is arranged on the bypass line 24 for switching the machine seal flushing liquid and inspecting and repairing the machine seal pipeline.

[0025] In a specific embodiment, a temperature transmitter 9 is arranged at the top of the mechanical seal return liquid distribution pipe 5, a pressure gauge 13 is arranged at the top of the mechanical seal liquid supply distribution pipe 4, and three equidistantly distributed liquid supply interfaces 11 are arranged at the bottom of the mechanical seal liquid supply distribution pipe 4. The three equidistantly arranged liquid supply interfaces 11 at the bottom of the mechanical seal liquid supply distribution pipe 4 are respectively connected to the liquid inlets of the main shaft mechanical seal 21, the separation shaft mechanical seal 22 and the liquid outlet mechanical seal 23.

[0026] Furthermore, a pressure transmitter 8, a safety valve 10, a liquid injection funnel 16 and an air injection port 17 are provided on the top of the buffer tank 1, and a gas pressure regulating valve 14 is provided on one side of the buffer tank 1, and the air injection port 17 is connected to the gas pressure regulating valve 14. When the system is running, first, flushing liquid is added to the buffer tank 1 to the highest liquid level through the liquid injection funnel 16, and then the valve of the air injection port 17 is opened, and the gas pressure regulating valve 14 is adjusted to ensure that the pressure transmitter 8 displays a pressure value of about 0.2Mpa, and then the circulating pump 2 is started, and the pressure value of the pressure gauge 13 is adjusted to 0.5Mpa through the regulating valve 6 respectively, so that the rotation speeds of the three flow sight glasses 7 are the same, thereby realizing the regulation of flow and pressure. Two liquid level switches 15 are provided on the side of the middle part of the buffer tank 1, and the two liquid level switches 15 are used to provide alarm signals and interlocking signals respectively. A cooling water supply interface 18, a cooling water return interface 19 and a drain valve 20 are provided at the bottom of the buffer tank 1.

[0027] The implementation principle of the nano sand mill multi-machine seal flushing system with adjustable flow and pressure in this embodiment is as follows:

[0028] During specific use, a liquid supply distribution pipe 4 and a liquid return distribution pipe 5 for a liquid seal are fixedly installed on one side of the mounting plate 3, the liquid supply distribution pipe 4 for a liquid seal is located below the liquid return distribution pipe 5, the liquid supply distribution pipe 4 for a liquid seal is connected to the liquid outlet of the buffer tank 1, a pressure gauge 13 is arranged on the top of the liquid supply distribution pipe 4, three liquid supply interfaces 11 distributed evenly at a distance are arranged on the bottom of the liquid supply distribution pipe 4, the three liquid supply interfaces 11 distributed evenly at a distance at the bottom of the liquid supply distribution pipe 4 are respectively connected to the liquid inlets of the spindle machine seal 21, the separation shaft machine seal 22 and the liquid outlet machine seal 23, and the liquid return distribution pipe 5 is connected to the liquid inlet of the buffer tank 1, a temperature transmitter 9 is arranged on the top of the liquid return distribution pipe 5, three three-way interfaces distributed evenly at a distance are arranged on the bottom of the liquid return distribution pipe 5, and the three-way interfaces are all connected to a regulating valve 6, a flow sight glass 7 and a liquid return interface 12, the spindle machine seal 21 and the separation shaft machine seal The return liquid pipes of 22 and the liquid outlet mechanical seal 23 are respectively connected to the return liquid interface 12 equidistantly arranged at the bottom of the mechanical seal return liquid distribution pipe 5, and the side positions of the mechanical seal liquid supply distribution pipe 4 and the mechanical seal return liquid distribution pipe 5 are connected with a bypass pipeline 24 and a ball valve 25. The ball valve 25 is arranged on the bypass pipeline 24. Through the two liquid level switches 15 arranged on the middle side of the buffer tank 1, the two liquid level switches 15 are respectively used to provide alarm signals and interlocking signals. When the system is running, first, the flushing liquid is added to the buffer tank 1 to the highest liquid level through the liquid filling funnel 16, and then the valve of the gas injection port 17 is opened, and the gas pressure regulating valve 14 is adjusted to ensure that the pressure transmitter 8 displays a pressure value of about 0.2Mpa, and then the circulation pump 2 is started to work, and the pressure value of the pressure gauge 13 is adjusted to 0.5Mpa through the regulating valve 6 respectively, so that the rotation speeds of the three flow sight glasses 7 are the same, thereby realizing the regulation of flow and pressure.

Claims

1. A nano sand mill multi-machine seal flushing system with adjustable flow and pressure, comprising a mounting plate (3), a main shaft machine seal (21), a separation shaft machine seal (22) and a liquid outlet machine seal (23), characterized in that: The buffer tank (1) and the circulating pump (2) are fixedly mounted on both sides of the mounting plate (3), and a machine seal liquid supply distribution pipe (4) and a machine seal liquid return distribution pipe (5) are fixedly mounted on one side of the mounting plate (3). The machine seal liquid supply distribution pipe (4) is located below the machine seal liquid return distribution pipe (5). The machine seal liquid supply distribution pipe (4) is connected to the liquid outlet of the buffer tank (1), and the machine seal liquid return distribution pipe (5) is connected to the liquid inlet of the buffer tank (1). The bottom of the machine seal liquid return distribution pipe (5) is provided with three equidistant The three-way interfaces are distributed, and the three-way interfaces are all connected with a regulating valve (6), a flow sight glass (7) and a liquid return interface (12). The liquid return pipes of the main shaft mechanical seal (21), the separation shaft mechanical seal (22) and the liquid outlet mechanical seal (23) are respectively connected to the liquid return interfaces (12) arranged equidistantly at the bottom of the mechanical seal liquid return distribution pipe (5). The mechanical seal liquid supply distribution pipe (4) is connected to the mechanical seal liquid return distribution pipe (5) through a bypass line (24) and a ball valve (25), and the ball valve (25) is arranged on the bypass line (24).

2. A nano sand mill multi-machine seal flushing system with adjustable flow and pressure according to claim 1, characterized in that: A temperature transmitter (9) is provided at the top of the mechanical seal return liquid distribution pipe (5).

3. The nano sand mill multi-machine seal flushing system with adjustable flow and pressure according to claim 1, characterized in that: A pressure gauge (13) is arranged at the top of the mechanical seal liquid supply distribution pipe (4), and three equidistantly distributed liquid supply interfaces (11) are arranged at the bottom of the mechanical seal liquid supply distribution pipe (4).

4. The nano sand mill multi-machine seal flushing system with adjustable flow and pressure according to claim 3 is characterized in that: The three liquid supply interfaces (11) equidistantly arranged at the bottom of the mechanical seal liquid supply distribution pipe (4) are respectively connected to the liquid inlets of the main shaft mechanical seal (21), the separation shaft mechanical seal (22) and the liquid outlet mechanical seal (23).

5. The nano sand mill multi-machine seal flushing system with adjustable flow and pressure according to claim 1, characterized in that: The top of the buffer tank (1) is provided with a pressure transmitter (8), a safety valve (10), a liquid injection funnel (16) and a gas injection port (17); one side of the buffer tank (1) is provided with a gas pressure regulating valve (14); and the gas injection port (17) is connected to the gas pressure regulating valve (14).

6. The nano sand mill multi-machine seal flushing system with adjustable flow and pressure according to claim 1, characterized in that: Two liquid level switches (15) are arranged on the side of the middle part of the buffer tank (1).

7. The nano sand mill multi-machine seal flushing system with adjustable flow and pressure according to claim 1, characterized in that: The bottom of the buffer tank (1) is provided with a cooling water supply interface (18), a cooling water return interface (19) and a drain valve (20).

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