High-temperature hot water pump of double-balance-pipe balance device with buffer tank

Abstract

The utility model discloses a high-temperature hot water pump with a buffer tank and a double-balance-pipe balancing device, which comprises a base, a pump body is fixedly connected onto the base, the pump body is provided with a pump suction inlet, the pump body is communicated with a pump body balance cavity side balance pipe, the pump body balance cavity side balance pipe is communicated with the buffer tank, and the buffer tank is communicated with the pump body balance cavity side balance pipe. The pump body balance cavity side balance pipes are communicated with the top of the buffer tank, the pump suction inlet side balance pipes are communicated between the buffer tank and the pump suction inlet, the number of the pump body balance cavity side balance pipes is two, the number of the pump suction inlet side balance pipes is two, the pump body balance cavity side balance pipes are communicated with the top of the buffer tank, and the pump suction inlet side balance pipes are communicated with the bottom of the buffer tank. The high-temperature hot water pump solves the technical problems that when an existing high-temperature hot water pump operates, cavitation is caused at a pump inlet, pump flow lift is sharply reduced, efficiency is low, power consumption is increased, operation is unstable, and vibration is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature hot water pumps, in particular to a high-temperature hot water pump with a double-balance-pipe balancing device having a buffer tank. Background Art

[0002] High-temperature hot water pumps are widely used in the transportation of liquids in various devices such as oil refining, petrochemicals, coal-to-oil, coal chemical industry, natural gas processing, salt-alkali processing, mine drainage, remote water supply, heating, etc. They are suitable for transporting various clean high-temperature hot water or hot water containing trace solid particles.

[0003] At present, the balancing device of high-temperature hot water pumps all has a single balancing pipe and no buffer tank, with a simple structure. Due to the large pressure drop before and after the balancing mechanism of the multi-stage centrifugal pump, high-temperature water is prone to vaporization in the balancing chamber, and the balancing pipe of the multi-stage centrifugal pump has a simple structure, a narrow flow area of ​​the balancing pipe, and a small heat exchange area. The high-temperature water flows fast and cools slowly in the balancing pipe, which intensifies the vaporization of the high-temperature water. The gas flows to the pump inlet along the balancing pipe, causing cavitation in the pump, thereby reducing the service life of the pump and causing economic losses.

[0004] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a high-temperature hot water pump with a double balancing pipe balancing device with a buffer tank, so as to overcome the problems existing in the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a high-temperature hot water pump with a double-balance-pipe balancing device having a buffer tank, so as to solve the problems existing in the above-mentioned prior art, reduce the vaporization of high-temperature water, reduce the cavitation of the pump, and extend the service life of the pump.

[0006] To achieve the above object, the utility model provides the following solution: The utility model provides a high-temperature hot water pump with a double balancing pipe balancing device with a buffer tank, comprising:

[0007] A base, wherein a pump body is fixedly connected to the base, the pump body having a pump suction inlet, the pump body is connected with a pump body balancing chamber side balancing pipe, the pump body balancing chamber side balancing pipe is connected with a buffer tank, a pump suction inlet side balancing pipe is connected between the buffer tank and the pump suction inlet, there are two balancing pipes on the pump body balancing chamber side and two balancing pipes on the pump suction inlet side, the pump body balancing chamber side balancing pipe is connected to the top of the buffer tank, and the pump suction inlet side balancing pipe is connected to the bottom of the buffer tank.

[0008] The utility model discloses the following technical effects:

[0009] 1. The utility model provides a high-temperature hot water pump with a double balancing pipe balancing device with a buffer tank. The balancing pipe on the pump body balancing cavity side, the balancing pipe on the pump suction inlet side and the buffer tank replace the simple structure of the original single balancing pipe. Therefore, while reducing the flow rate of the medium in the balancing pipe, the double balancing pipe arrangement of the balancing pipe on the pump body balancing cavity side and the balancing pipe on the pump suction inlet side also increases the heat exchange area of ​​the balancing pipe, improves the cooling speed, and makes it difficult for high-temperature water to vaporize in the balancing pipe.

[0010] 2. The utility model provides a high-temperature hot water pump with a double balancing pipe balancing device with a buffer tank. A buffer tank is installed between the balancing pipe on the balancing cavity side of the pump body and the balancing pipe on the pump suction inlet side, so that the high-temperature water in the balancing pipe is buffered and the cooling area is increased, making it more difficult for the high-temperature water to vaporize. Considering that the flow direction of the medium in the balancing pipe and the medium in the tank body will have a high temperature in the upper half of the tank and a low temperature in the lower half, when designing the buffer tank, the inlet and the outlet are staggered up and down, with the inlet at the top and the outlet at the bottom. When flowing out of the buffer tank, the medium is of low temperature, thereby further reducing the medium temperature, preventing the high-temperature water from vaporizing, avoiding cavitation of the high-temperature water at the pump inlet, ensuring stable operation of the pump, and extending the service life of the pump.

[0011] In summary, the technical solution of the utility model solves the technical problem that when the existing high-temperature hot water pump is in operation, cavitation occurs at the pump inlet, causing a sharp drop in pump flow head, low efficiency, increased power consumption, unstable operation, and increased vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a schematic diagram of the high-temperature hot water pump structure of the double-balance-pipe balancing device with a buffer tank of the utility model;

[0014] Among them, 1. base; 2. pump body; 3. balance pipe on the balance chamber side of the pump body; 4. buffer tank; 5. balance pipe on the pump suction inlet side; 6. pump suction inlet. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Reference Figure 1 The utility model provides a high-temperature hot water pump with a double-balance-pipe balancing device having a buffer tank, comprising:

[0018] A base 1 is provided with a pump body 2 fixedly connected thereto. The pump body 2 has a pump suction inlet 6. The pump body 2 is connected with a pump body balancing chamber side balancing pipe 3. The pump body balancing chamber side balancing pipe 3 is connected with a buffer tank 4. A pump suction inlet side balancing pipe 5 is connected between the buffer tank 4 and the pump suction inlet 6. There are two pump body balancing chamber side balancing pipes 3 and two pump suction inlet side balancing pipes 5. The pump body balancing chamber side balancing pipe 3 is connected with the top of the buffer tank 4, and the pump suction inlet side balancing pipe 5 is connected with the bottom of the buffer tank 4.

[0019] Finally, the balance chamber at the pump body 2, the buffer tank 4 and the pump suction port 6 are connected, so that the pressure of the balance chamber at the pump body 2 is reduced from the high pressure inside the pump to the pump inlet pressure, and the pressures at the three places are the same, thereby achieving balance.

[0020] The simple structure of the balancing pipe 3 on the pump body balancing cavity side, the balancing pipe 5 on the pump suction inlet side and the buffer tank replacing the original single balancing pipe reduces the flow rate of the medium in the balancing pipe. At the same time, the double balancing pipe arrangement of the balancing pipe 3 on the pump body balancing cavity side and the balancing pipe 5 on the pump suction inlet side also increases the heat exchange area of ​​the balancing pipe, improves the cooling speed, and makes it difficult for high-temperature water to vaporize in the balancing pipe; a buffer tank is installed between the balancing pipe 3 on the pump body balancing cavity side and the balancing pipe 5 on the pump suction inlet side, so that the high-temperature water in the balancing pipe is buffered and the cooling area is increased, making it more difficult for high-temperature water to vaporize; considering that the flow direction of the medium in the balancing pipe and the medium in the buffer tank 4 will have a temperature difference, the temperature of the medium in the upper half of the buffer tank 4 is high and the temperature of the lower half is low, when designing the buffer tank 4, the inlet and the outlet are staggered up and down, the inlet is at the top and the outlet is at the bottom, and the medium is at a low temperature when it flows out of the buffer tank 4, thereby further reducing the temperature of the medium, preventing the high-temperature water from vaporizing, and avoiding cavitation of the high-temperature water at the pump inlet, ensuring the stable operation of the pump and extending the service life of the pump.

[0021] The high-temperature hot water pump proposed in the prior art will cause cavitation at the pump inlet when running for a long time, resulting in a sharp drop in pump flow and head, low efficiency, increased power consumption, unstable operation, and increased vibration.

[0022] The balancing device of the high-temperature hot water pump of the utility model adopts the structure of double balancing pipes plus a buffer tank, replacing the simple structure of the original single balancing pipe, thereby solving the technical problems that the existing high-temperature hot water pump will cause cavitation at the pump inlet when running for a long time, resulting in a sharp drop in pump flow head, low efficiency, increased power consumption, unstable operation and increased vibration.

[0023] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A high-temperature hot water pump with a double-balance-pipe balancing device having a buffer tank, characterized in that: include: A base (1), wherein a pump body (2) is fixedly connected to the base (1), the pump body (2) having a pump suction port (6), the pump body (2) being connected to a pump body balancing chamber side balancing pipe (3), the pump body balancing chamber side balancing pipe (3) being connected to a buffer tank (4), a pump suction port side balancing pipe (5) being connected between the buffer tank (4) and the pump suction port (6), the pump body balancing chamber side balancing pipe (3) and the pump suction port side balancing pipe (5) both being two, the pump body balancing chamber side balancing pipe (3) being connected to the top of the buffer tank (4), and the pump suction port side balancing pipe (5) being connected to the bottom of the buffer tank (4).

Images