Cooling water recycling device for mechanical seal for pump

Abstract

The utility model provides a mechanical seal cooling water recycling device for a pump, and belongs to the technical field of mechanical seals. The mechanical seal cooling water recycling device for the pump comprises a water storage tank used for storing cooling water for the mechanical seal of the pump. The interior of the water storage tank is divided into a precipitation tank and a clarification tank which are used for removing impurities in the pump mechanical seal water and improving the water quality of the mechanical seal water; the slurry discharging pipeline on the water storage tank is used for discharging sewage of the water storage tank in time, the mechanical seal water pipeline is used for conveying clarified mechanical seal water, and the cooling water pipeline is used for conveying pump mechanical seal water. The internal structure of the mechanical seal water recycling device is improved, so that the cooling effect of centrifugal pump mechanical seal water in the using process is more stable and reliable, the using time of a centrifugal pump mechanical seal can be greatly prolonged, environmental pollution and sewage treatment pressure are reduced, and production and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical seals, and in particular relates to a cooling water circulation device for a mechanical seal of a pump. Background Art

[0002] The mechanical seal of a common pump is usually referred to as a "mechanical seal". It refers to a device that prevents fluid leakage in the pump by maintaining contact and relative sliding under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.

[0003] When the mechanical seal is working, friction between the dynamic ring and the static ring generates heat and needs to be cooled. Some pumps are cooled directly by passing the fluid inside the pump, while some pumps need to be equipped with separate mechanical seal water. For mechanical seals with separate mechanical seal water, in order to avoid heat damage during operation and affect the normal operation of the pump, the method of directly discharging the mechanical seal after cooling the mechanical seal with mechanical seal water is currently widely adopted at home and abroad. During discharge, personnel can observe the flow rate of mechanical seal water more clearly through the state of discharged water, which is convenient for adjusting the flow rate of mechanical seal water and determining whether the mechanical seal water is normally used.

[0004] However, this method still has significant safety risks and drawbacks. For example, observing the seal water flow by personnel can easily lead to misjudgment or damage to the seal due to untimely inspections. Direct discharge will inevitably lead to excessive seal water consumption, which is not conducive to cost control. If the seal is damaged or leaking, direct discharge will cause environmental pollution and even lead to safety accidents. The current method of directly discharging the seal water after cooling the seal not only causes environmental pollution but also increases the company's production and operating costs.

[0005] In view of this, the utility model provides a cooling device for the cooling water circulation of the mechanical seal of a centrifugal pump. Utility Model Content

[0006] The main purpose of this utility model is to provide a cooling water circulation device for a mechanical seal of a pump, which solves the problems of large cooling water consumption of a centrifugal pump, sewage discharge and sewage treatment, etc. The cooling water circulation device of this utility model has automatic control capabilities, which greatly improves the service life of the centrifugal pump mechanical seal, reduces environmental pollution and sewage treatment pressure, and reduces production and maintenance costs.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A pump mechanical seal cooling water recycling device includes a water storage tank for storing pump mechanical seal cooling water, wherein a middle partition is provided inside the water storage tank to divide the water storage tank into a sedimentation tank and a clarification tank;

[0009] A cooling water inlet pipe and an automatic water supply pipe are provided on the upper part of the sedimentation tank. The cooling water inlet pipe is used to transport cooling water for pump sealing to the water storage tank, and the automatic water supply pipe is used to supply water to the water storage tank.

[0010] A sedimentation tank discharge pipe is provided at the lower part of the sedimentation tank for discharging impurities from the sedimentation tank;

[0011] A clarification tank discharge pipe is provided at the lower part of the clarification tank for discharging impurities from the clarification tank;

[0012] An overflow pipe is provided on the upper portion of the clarification tank for discharging excess clarifier sealing water in the clarification tank.

[0013] As a preferred embodiment of the above technical solution, a slurry discharge pipe is provided on the outside of the clarification tank, and the slurry discharge pipe is connected to the overflow pipe, the sedimentation tank slurry discharge pipe, and the clarification tank slurry discharge pipe, and is used to discharge excess water in the clarification tank and impurities in the sedimentation tank and the clarification tank into the water storage tank.

[0014] As a preferred embodiment of the above technical solution, the sedimentation tank discharge pipe and the clarification tank discharge pipe are at the same height, and the height of the discharge pipe is lower than that of the sedimentation tank discharge pipe, which facilitates the flow of impurities into the sedimentation tank discharge pipe and the clarification tank discharge pipe.

[0015] As a preferred embodiment of the above technical solution, a communicating clarifier sealing water pipe is provided at the lower part of the side of the clarifier tank, and is higher than the height of the clarifier tank discharge pipe.

[0016] As a preferred embodiment of the above technical solution, a clarifier seal water delivery pipeline is provided outside the clarifier tank, and the clarifier seal water delivery pipeline is connected to the clarifier seal water pipeline for delivering the clarifier seal water to the centrifugal pump.

[0017] As a preferred embodiment of the above technical solution, the clarifier seal water delivery pipeline is connected to one end of the pressure regulating pipeline through a valve, and the pressure regulating pipeline is used to adjust the pressure of the clarifier seal water delivery pipeline; the other end of the pressure regulating pipeline is connected to the upper part of the sedimentation tank, and is used to discharge the clarifier seal water from the pressure regulating pipeline into the water storage tank.

[0018] As a preferred embodiment of the above technical solution, a float valve is provided inside the sedimentation tank, and the float valve is connected to the automatic water replenishment pipeline for controlling the water level of the water tank.

[0019] As a preferred embodiment of the above technical solution, the cooling water circulation device is also equipped with two or more circulation pumps.

[0020] As a preferred embodiment of the above technical solution, the circulation pump is arranged outside the water tank.

[0021] As a preferred embodiment of the above technical solution, an observation window is further provided on the upper surface of the water tank for observing the water level in the water tank.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] The utility model improves the internal structure of the machine seal water recycling device and purifies the pump seal water twice, thereby improving the quality of the machine seal cooling water, making the cooling effect of the centrifugal pump machine seal water more stable and reliable during use, and can greatly increase the service life of the centrifugal pump machine seal, reduce environmental pollution and sewage treatment pressure, and reduce production and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 This is the overall diagram of the utility model pump mechanical seal cooling water recycling device;

[0026] Figure 2 This is a cross-sectional view of the utility model of a cooling water recycling device for a mechanical seal of a pump;

[0027] Figure 3 This is a front view of the utility model pump mechanical seal cooling water recycling device;

[0028] Figure 4 This is a side view of the utility model pump mechanical seal cooling water recycling device;

[0029] Figure 5 This is a top view of the utility model pump mechanical seal cooling water recycling device;

[0030] In the figure: overflow pipe 1; sedimentation tank discharge pipe 2; clarifier discharge pipe 3; clarifier seal water pipe 4; discharge pipe 5; circulation pump 6; clarifier seal water delivery pipe 7; pressure regulating pipe 8; valve 9; automatic water replenishment pipe 10; cooling water inlet pipe 11; observation window 12; middle partition 13; float valve 14; sedimentation tank 15; clarifier 16. DETAILED DESCRIPTION

[0031] The present invention is described in further detail below with reference to the accompanying drawings:

[0032] like Figure 1-5As shown, a cooling water recycling device for a mechanical seal of a pump includes a water tank for storing cooling water for a pump seal, wherein a middle partition 13 is provided inside the water tank, dividing the water tank into a sedimentation tank 15 and a clarification tank 16; a cooling water inlet pipe 11 and an automatic water replenishment pipe 10 are provided on the upper part of the sedimentation tank 15, wherein the cooling water inlet pipe 11 is used to convey cooling water for a pump seal to the water tank, and the automatic water replenishment pipe 10 is used to replenish water to the water tank; a sedimentation tank discharge pipe 2 is provided on the lower part of the sedimentation tank 15 for discharging impurities from the sedimentation tank; a clarification tank discharge pipe 3 is provided on the lower part of the clarification tank 16 for discharging impurities from the clarification tank; an overflow pipe 1 is provided on the upper part of the clarification tank for discharging excess clarifier seal water in the clarification tank.

[0033] As a specific implementation method of the present invention, after the pump seal water enters the water storage tank, the sedimentation tank 15 is used to precipitate and filter the pump seal water, and at the same time cool the seal water, and utilize the sedimentation effect of the sedimentation tank to reduce the impurities in the seal water; after sedimentation through the sedimentation tank 15, the seal water enters the clarification tank 16, and the clarification tank 16 again removes impurities and suspended particles in the seal water to ensure that the cooling water meets the requirements of the seal and avoids damage to the seal of the centrifugal pump.

[0034] As a specific embodiment of the present invention, a slurry discharge pipe 5 is provided on the outside of the clarification tank 16, and the slurry discharge pipe 5 is connected to the overflow pipe 1, the sedimentation tank slurry discharge pipe 2, and the clarification tank slurry discharge pipe 3, and is used to discharge excess water in the clarification tank and impurities in the sedimentation tank and the clarification tank into the water storage tank.

[0035] As a specific embodiment of the present utility model, the sedimentation tank discharge pipe 2 and the clarification tank discharge pipe 3 are at the same height, and the height of the discharge pipe 5 is lower than the sedimentation tank discharge pipe 2, which facilitates the flow of impurities from the sedimentation tank discharge pipe 2 and the clarification tank discharge pipe 3 into the water storage tank.

[0036] As a specific embodiment of the present invention, a communicating clarifier sealing water pipe 4 is provided at the lower side of the clarifier tank 16 and is higher than the clarifier tank discharge pipe 3 , so as to facilitate the transportation of the clarifier sealing water to the clarifier sealing water transportation pipe 7 .

[0037] As a specific embodiment of the present utility model, a clarifier seal water delivery pipe 7 is provided on the outside of the clarifier tank 16, and the clarifier seal water delivery pipe 7 is connected to the clarifier seal water pipe 4. The clarifier seal water delivery pipe 7 is connected to one end of the pressure regulating pipe 8 through a valve 9. Through the valve 9, the clarifier seal water in the clarifier seal water pipe 7 is released to adjust the pressure of the clarifier seal water delivery pipe 7; the other end of the pressure regulating pipe 8 is connected to the upper part of the sedimentation tank 15 to recover the released clarifier seal water to the water storage tank.

[0038] As a specific embodiment of the present invention, a float valve 14 is installed within the sedimentation tank 15. This float valve 14 is connected to the automatic water supply pipe 10 and is used to control the water level in the water storage tank. When the liquid level in the sedimentation tank 15 is low, the float valve 14 opens, and the automatic water supply pipe 10 replenishes water into the sedimentation tank 15. When the liquid level in the sedimentation tank 15 is high, the float valve 14 closes, and the mechanical seal water overflows from the sedimentation tank 15 through the middle partition 13 and enters the clarification tank 16.

[0039] As a specific embodiment of the present invention, when the water level in the sedimentation tank 15 is too high, the pump seal water overflows from the sedimentation tank 15 through the middle partition 13 into the clarification tank 16, and the clarifier seal water in the clarification tank 16 passes through the clarifier seal water pipe 4 and the circulating pump 6 through the clarifier seal water delivery pipe 7 into the centrifugal pump inlet seal water pipe.

[0040] As a specific embodiment of the present invention, the cooling water recycling device is equipped with two or more circulation pumps 6, which are arranged outside the water storage tank and are used to transport clarifier sealing water to the centrifugal pump inlet sealing water pipeline.

[0041] As a preferred embodiment of the above technical solution, an observation window 12 is further provided on the upper surface of the water tank for observing the water level in the water tank.

[0042] The working principle of the utility model is as follows: the pump seal water enters the sedimentation tank 15 of the water storage tank from the cooling water inlet pipe 11, and the float valve controls the water level of the sedimentation tank 15. When the liquid level of the sedimentation tank 15 is low, the float valve 14 opens, and the automatic water replenishment system 10 replenishes water into the sedimentation tank 15; the machine seal water naturally settles in the sedimentation tank 15. When the liquid level of the sedimentation tank 15 is high, the float valve 14 closes, and the settled clarifier seal water overflows through the middle partition 13 into the clarifier tank 16, passes through the clarifier seal water pipe 4, and is acted upon by the circulating pump 6 through the clarifier seal water delivery pipe 7 to enter the centrifugal pump machine seal water inlet pipe. After the centrifugal pump is mechanically sealed and cooled, it enters the water storage tank 17 through the cooling water inlet pipe 11, thereby realizing the circulation of cooling water.

[0043] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A cooling water recycling device for a pump mechanical seal, characterized in that: It comprises a water storage tank for storing cooling water for pump sealing, wherein a middle partition (13) is provided inside the water storage tank to divide the water storage tank into a sedimentation tank (15) and a clarification tank (16); The upper portion of the sedimentation tank (15) is provided with a cooling water inlet pipe (11) and an automatic water supply pipe (10), wherein the cooling water inlet pipe (11) is used to transport cooling water for pump sealing to the water storage tank, and the automatic water supply pipe (10) is used to supply water to the water storage tank; A sedimentation tank discharge pipe (2) is provided at the lower portion of the sedimentation tank (15) for discharging impurities from the sedimentation tank (15); A clarification tank discharge pipe (3) is provided at the lower portion of the clarification tank (16) for discharging impurities from the clarification tank (16); An overflow pipe (1) is provided at the upper portion of the clarification tank (16) for discharging excess clarifier sealing water in the clarification tank (16).

2. A pump mechanical seal cooling water circulation device according to claim 1, characterized in that: A pulp discharge pipe (5) is provided outside the clarification tank (16), and the pulp discharge pipe (5) is in communication with the overflow pipe (1), the sedimentation tank pulp discharge pipe (2), and the clarification tank pulp discharge pipe (3).

3. A pump mechanical seal cooling water circulation device according to claim 2, characterized in that: The sedimentation tank discharge pipe (2) and the clarification tank discharge pipe (3) are at the same height, and the discharge pipe (5) is lower in height than the sedimentation tank discharge pipe (2).

4. A pump mechanical seal cooling water circulation device according to claim 1, characterized in that: A communicating clarifier sealing water pipe (4) is provided at the lower part of the side of the clarifier tank (16), and is higher than the height of the clarifier tank discharge pipe (3).

5. A pump mechanical seal cooling water circulation device according to claim 1, characterized in that: A clarifier sealing water delivery pipeline (7) is provided outside the clarifier tank (16), and the clarifier sealing water delivery pipeline (7) is connected to the clarifier sealing water pipeline (4).

6. A pump mechanical seal cooling water circulation device according to claim 5, characterized in that: The clarifier seal water delivery pipeline (7) is connected to one end of the pressure regulating pipeline (8) via a valve (9), and the other end of the pressure regulating pipeline (8) is connected to the upper part of the sedimentation tank (15).

7. A pump mechanical seal cooling water circulation device according to claim 1, characterized in that: A float valve (14) is provided inside the sedimentation tank (15), and the float valve (14) is connected to the automatic water supply pipeline (10).

8. A pump mechanical seal cooling water circulation device according to claim 1, characterized in that: The cooling water circulation device is also equipped with two or more circulation pumps (6).

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