Slurry pump

Abstract

The utility model relates to the technical field of slurry pumps, and provides a slurry pump which comprises a pump body and further comprises a buffer water tank, a water inlet and an overflow port are formed in the buffer water tank, a floating ball valve is installed at the water inlet, and the pump body adopts a mechanical shaft seal. The bottom of the buffer water tank communicates with the interior of the mechanical shaft seal chamber in a circulating mode through a water inlet pipe and a water return pipe, and the water return pipe communicates with a circulating pump. The mechanical shaft seal chamber has the advantages that the buffering water tank is arranged, water can be supplied through the buffering water tank when water is suddenly cut off, it is guaranteed that the interior of the mechanical shaft seal chamber cannot be short in time, and rush repair time is won, water can circularly flow through the floating ball valve and the overflow opening, and the mechanical shaft seal chamber can be cooled under the condition that cooling of the mechanical shaft seal chamber is insufficient. Or under the condition that the water quantity of the cooling water tank is not enough, automatic water supplementing and non-pressure overflow can be selected to enhance heat exchange and ensure that water shortage is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of slurry pumps, specifically to a slurry pump. Background Technology

[0002] A slurry pump is a machine that uses centrifugal force to increase the energy of a solid-liquid mixture, converting electrical energy into the kinetic and potential energy of the medium. It is mainly applicable to industries such as mining, power plants, dredging, metallurgy, chemicals, building materials, and petroleum.

[0003] In slurry pumps that use mechanical shaft seals, the mechanical shaft seal is a core component that generates a significant amount of heat during operation. Therefore, external water is needed to provide cooling and lubrication for the mechanical shaft seal chamber, typically using either circulating water or a water tank. However, in practical applications, when using circulating water for cooling, a sudden water outage cannot be detected quickly, ultimately leading to seal damage due to water shortage. Conversely, using a water tank for cooling can result in untimely water replenishment, similarly causing insufficient heat exchange in the mechanical seal. Utility Model Content

[0004] This utility model proposes a slurry pump that, by setting up a buffer water tank, can replenish water in the event of a sudden water outage, ensuring that the mechanical shaft seal chamber will not run out of water for a short period of time, thus buying time for emergency repairs. It can also achieve water circulation through a float valve and overflow port. In the event of insufficient cooling of the mechanical shaft seal chamber or insufficient water in the cooling water tank, automatic water replenishment and pressureless overflow can be selected to enhance heat exchange and ensure that there is no water shortage.

[0005] Therefore, the technical solution adopted is as follows:

[0006] A slurry pump includes a pump body and a buffer tank. The buffer tank has an inlet and an overflow outlet. A float valve is installed at the inlet. The pump body uses a mechanical shaft seal. The bottom of the buffer tank is connected to the internal circulation of the mechanical shaft seal chamber through an inlet pipe and a return pipe. A circulation pump is connected to the return pipe.

[0007] A further technical solution is that the pump body also includes a pump head, a coupling, and a transmission unit.

[0008] A further technical solution is that the float valve includes a float, a connecting rod, and a valve body. One end of the connecting rod is fixedly connected to the float, and the other end is rotatably connected to the valve body via a pin.

[0009] A further technical solution is that the lid of the buffer water tank has a semi-closed structure.

[0010] A further technical solution is that the return water port of the return water pipe is located in the middle of the buffer water tank.

[0011] A further technical solution is that the buffer water tank is fixed to the pump head by a connecting bracket, the connecting bracket includes a support rod fixed to the pump head and vertically arranged, a horizontally arranged support plate is fixed on the support rod, and the buffer water tank is placed above the support plate.

[0012] A further technical solution is that a support block is fixed between the buffer water tank and the support plate.

[0013] The working principle and beneficial effects of this application are as follows:

[0014] 1. By setting up a buffer water tank, water can be continuously supplied to the mechanical shaft seal chamber in the event of a sudden water outage, ensuring that the mechanical shaft seal chamber will not run out of water in a short period of time, thus saving time for emergency repairs. This effectively prevents insufficient heat exchange caused by untimely water replenishment and improves the stability and service life of the slurry pump.

[0015] 2. The inlet of the buffer water tank is equipped with a float valve, which, together with the overflow port, enables dynamic water replenishment. Through the coordinated action of the float valve and the overflow port, precise water level control is achieved. In the event of insufficient cooling in the mechanical shaft seal chamber, resulting in insufficient water volume in the cooling water tank, water can be automatically replenished to ensure that the mechanical shaft seal chamber can maintain good cooling effect even under high temperature and high pressure environments. This effectively prevents seal failure due to overheating and further improves the reliability and operating efficiency of the slurry pump under extreme conditions. Attached Figure Description

[0016] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of this application;

[0018] Figure 2 This is a schematic diagram of the structure of the buffer tank described in this application;

[0019] Figure 3 This is a schematic diagram of the pump body described in this application;

[0020] Figure 4 This is a schematic diagram of the structure of the return water pipe described in this application;

[0021] Figure 5 This is a schematic diagram of the structure of the connecting bracket described in this application;

[0022] Figure 6 This is a schematic diagram of the structure of the float valve described in this application.

[0023] In the diagram: 1. Pump body; 11. Mechanical shaft seal chamber; 12. Pump head; 13. Coupling; 14. Transmission section; 2. Buffer tank; 21. Inlet; 22. Overflow port; 23. Inlet pipe; 24. Return pipe; 25. Circulating pump; 26. Tank cover; 3. Float valve; 31. Float; 32. Connecting rod; 33. Valve body; 4. Connecting bracket; 41. Support rod; 42. Support plate; 43. Support block. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0025] like Figures 1-6 As shown, a slurry pump includes a pump body 1 and a buffer tank 2. The buffer tank 2 has an inlet 21 and an overflow port 22. A float valve 3 is installed at the inlet 21. The pump body 1 adopts a mechanical shaft seal. The bottom of the buffer tank 2 is connected to the internal circulation of the mechanical shaft seal chamber 11 through an inlet pipe 23 and a return pipe 24. A circulation pump 25 is connected to the return pipe 24.

[0026] like Figures 1-2 As shown, under normal conditions, both the buffer water tank 2 and the mechanical shaft seal chamber 11 are full of water. The buffer water tank 2 is connected to the internal circulation of the mechanical shaft seal chamber 11 through the inlet pipe 23 and the return pipe 24, realizing the exchange of hot and cold water between the inside of the mechanical shaft seal chamber 11 and the circulating water tank. This provides lubrication for the mechanical shaft seal chamber 11 and removes heat from the friction pair, ensuring the normal operation of the equipment. The buffer water tank 2 is designed with an inlet 21 and an overflow port 22. The inlet 21 is connected to a small float valve 3, and the lower edge of the inlet 21 is slightly higher than the upper edge of the overflow port 22. This part is connected by the user. When the user connects the inlet 21 with direct-flow circulating water, the float valve 3 controls the automatic water intake, while the overflow port 22 overflows without pressure, always maintaining a stable water level in the tank. Even if the water intake is suddenly interrupted, the buffer water tank 2 is still full of water, and the water inside can continue to support the lubrication and cooling of the mechanical shaft seal chamber 11 of the slurry pump, giving the equipment maintenance time.

[0027] When users use buffer tank 2 as a cooling water tank by adding a water circulation radiator and cooling fan, the slurry pump operates in relatively high-temperature areas where the mechanical shaft seal chamber 11 generates a lot of heat. This results in increased hot water discharge from the circulation pump 25, causing the water level inside buffer tank 2 to rise and overflow from overflow port 22. At this time, float valve 3 automatically controls the water supply from a well or similar source connected to inlet 21, automatically changing the water in buffer tank 2, removing heat, and enhancing the cooling effect of the cooling water tank. When the mechanical shaft seal chamber 11 generates normal heat, buffer tank 2 is used as a cooling water tank. This embodiment consumes less water than the direct-flow circulating water method, achieving energy savings.

[0028] By setting up a buffer water tank 2, water can be continuously supplied to the mechanical shaft seal chamber 11 in the event of a sudden water outage, ensuring that the mechanical shaft seal chamber 11 will not run out of water in a short period of time, thus saving time for emergency repairs. This effectively prevents insufficient heat exchange due to untimely water replenishment, improving the stability and service life of the slurry pump. The inlet 21 of the buffer water tank 2 is equipped with a float valve 3, which, together with the overflow port 22, enables dynamic water replenishment. Through the coordinated action of the float valve 3 and the overflow port 22, precise water level control is achieved. In the event of insufficient cooling of the mechanical shaft seal chamber 11 or insufficient water in the tank, water can be automatically replenished, ensuring that the mechanical shaft seal chamber 11 maintains good cooling even under high temperature and high pressure environments. This effectively prevents seal failure due to overheating, further improving the reliability and operating efficiency of the slurry pump under extreme conditions.

[0029] like Figure 3 As shown, the slurry pump also includes a pump head 12, a coupling 13, and a transmission unit 14. All components are made of high-strength, wear-resistant materials to ensure excellent corrosion resistance and wear resistance under complex operating conditions, extending the equipment's service life. Through optimized design, the internal flow channels of the pump body 1 are smoother, reducing fluid resistance, improving pump delivery efficiency, and further enhancing the overall performance and stability of the slurry pump. Simultaneously, the pump body 1 adopts a modular design, facilitating disassembly and maintenance.

[0030] The transmission section is 14 parts long and uses a bracket and bearing assembly. The pump shaft has a large diameter, good rigidity, and a short cantilever, preventing bending and vibration under harsh working conditions. The bearings are selected according to the power transmitted, using heavy-duty single-row or double-row tapered roller bearings and cylindrical roller bearings, which can withstand the maximum axial and radial loads of the pump. The bearings are grease lubricated, and both ends of the bearing body have sealed end caps, labyrinth sleeves, and labyrinth rings, which can effectively prevent slurry and other contaminants from entering the bearings, ensuring safe operation and a long service life.

[0031] like Figure 6As shown, the float valve 3 includes a float 31, a connecting rod 32, and a valve body 33. One end of the connecting rod 32 is fixedly connected to the float 31, and the other end is rotatably connected to the valve body 33 via a pin. The float 31 of the float valve 3 always floats on the water. When the water level rises, the float 31 also rises, which in turn drives the connecting rod 32 to rise. The connecting rod 32 is connected to the valve body 33 at the other end. When it rises to a certain position, the connecting rod 32 supports the rubber piston pad, sealing the water source. When the water level drops, the float valve 3 also drops, and the connecting rod 32 drives the piston pad to open. The float valve 3 regulates the liquid supply by controlling the liquid level, ensuring that the water level in the buffer tank 2 is maintained within the set range.

[0032] To prevent excessive water flow from overflowing the tank cover 26, a float valve 3 is used to maintain a certain gap between the liquid level and the top of the buffer tank 2. Furthermore, the cover 26 of the buffer tank 2 has a semi-enclosed structure. This reduces water evaporation, facilitates heat dissipation from the tank, and also makes daily maintenance and water level monitoring easier.

[0033] like Figure 4 As shown, the return port of the return water pipe 24 is located in the middle of the buffer water tank 2. The water circulation path has been optimized. When the inlet 21 is connected using a direct current circulation, hot water can be delivered more directly into the upper part of the buffer water tank 2 and overflow through the overflow port 22, thereby improving the heat exchange efficiency.

[0034] like Figure 5 As shown, the buffer tank 2 is fixed to the pump head 12 via a connecting bracket 4. The connecting bracket 4 includes a support rod 41 fixed to the pump head 12 and vertically arranged. A horizontally arranged support plate 42 is fixed on the support rod 41, and the buffer tank 2 is placed above the support plate 42. The stable connection between the support rod 41 and the support plate 42 ensures the stability of the buffer tank 2 during operation, further enhancing the overall safety of the pump body 1. The overall structure is compact, easy to install, and suitable for various industrial environments. Furthermore, a support block 43 is fixed between the buffer tank 2 and the support plate 42. The addition of the support block 43 further distributes the weight of the buffer tank 2, avoiding structural fatigue caused by long-term operation, extending the service life of the equipment, and also facilitating heat dissipation of the buffer tank 2.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A slurry pump, comprising a pump body (1), characterized in that: It also includes a buffer water tank (2), which has an inlet (21) and an overflow (22). A float valve (3) is installed at the inlet (21). The pump body (1) adopts a mechanical shaft seal. The bottom of the buffer water tank (2) is connected to the inside of the mechanical shaft seal chamber (11) through an inlet pipe (23) and a return pipe (24). A circulation pump (25) is connected to the return pipe (24).

2. A slurry pump according to claim 1, characterized in that, The pump body (1) also includes a pump head (12), a coupling (13), and a transmission part (14).

3. A slurry pump according to claim 1, characterized in that, The float valve (3) includes a float (31), a connecting rod (32) and a valve body (33). One end of the connecting rod (32) is fixedly connected to the float (31), and the other end is rotatably connected to the valve body (33) through a pin.

4. A slurry pump according to claim 1, characterized in that, The cover (26) of the buffer water tank (2) is a semi-closed structure.

5. A slurry pump according to claim 1, characterized in that, The return water port of the return water pipe (24) is located in the middle of the buffer water tank (2).

6. A slurry pump according to claim 2, characterized in that, The buffer tank (2) is fixed to the pump head (12) by a connecting bracket (4). The connecting bracket (4) includes a support rod (41) fixed to the pump head (12) and vertically arranged. A horizontally arranged support plate (42) is fixed on the support rod (41). The buffer tank (2) is placed above the support plate (42).

7. A slurry pump according to claim 5, characterized in that, A support block (43) is also fixed between the buffer tank (2) and the support plate (42).

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