Automatic and sufficient exhaust structure for vertical pump

Abstract

The utility model relates to an automatic full exhaust structure for a vertical pump, which comprises a main exhaust system and an auxiliary exhaust system, and the main exhaust system comprises a water outlet elbow, a pump cover and a main exhaust valve; the pump cover is mounted at the top of the water outlet elbow; the main exhaust valve is mounted at the top of the pump cover through a fastener; the auxiliary exhaust system comprises a main shaft, a guide bearing, a packing sealing part and an auxiliary exhaust valve; the main shaft, the guide bearing and the stuffing box component form an inner cavity, the guide bearing and the stuffing box component are both installed on the pump cover, and the auxiliary exhaust valve is installed on the stuffing box component and located at the topmost position of the inner cavity; the main shaft is a rotating piece, and the guide bearing is located outside the main shaft and is a non-rotating piece. The water pump is provided with the main exhaust system and the auxiliary exhaust system, gas in the pump cavity and the protective pipe cavity can be automatically, fully and rapidly exhausted in the starting process of the water pump, a unit can operate more safely and stably, meanwhile, the service life of quick-wear parts is prolonged, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to an exhaust structure, in particular to an automatic and sufficient exhaust structure for a vertical pump with a main exhaust system and an auxiliary exhaust system, which can automatically, fully and quickly exhaust the gas in a pump cavity and a protective tube cavity during the start-up process of a water pump, so as to make the unit run more safely and stably, and at the same time extend the service life of wearing parts and reduce the operation and maintenance costs. Background Art

[0002] like Figure 1 As shown, the related structure of the existing vertical pump exhaust system is mainly composed of a pump cover 1', an exhaust valve 2', a water outlet elbow 3', a main shaft 4', a stuffing box component 5', a guide bearing component 6' and a shaft protection tube 7'. The stuffing box component 5' does not reserve an external clean water inlet, and the exhaust valve 2' is arranged on the water outlet elbow 3'. This structure can still operate normally for units with relatively small water pump parameters and water pump sizes because the gas volume is relatively small. However, with the rapid development of industry, the water pump parameters are getting bigger and bigger, the size is getting longer and longer, and the gas volume that needs to be discharged during the water pump startup process is increasing. The original structure has very large safety hazards. The specific problems are:

[0003] First, the exhaust valve is set on the water outlet elbow, which is not the highest point of the water pump cavity. As a result, some gas cannot be discharged through the exhaust valve and is compressed at the top of the pump cavity, causing vibration, irregular noise, and even cavitation during the operation of the unit, which damages the water pump and poses a great hidden danger to the safe and stable operation of the unit.

[0004] Second, there is no reserved external clean water inlet on the stuffing box. When the water pump medium contains mud, sand, granular impurities and the medium is relatively harsh, these impurities accumulate in the shaft protective tube, causing serious wear on the guide bearings of the wearing parts. In some cases, the unit must be shut down for maintenance due to excessive wear of the wearing parts within less than a month of operation.

[0005] Third, there is no exhaust system in the inner cavity of the shaft protective tube. When the water pump is started, the medium in the inner cavity of the protective tube rises and compresses the air originally in the inner cavity into the top stuffing box component. Since there is no exhaust system, this part of the gas cannot be discharged or is slowly discharged through the gap of the packing seal. However, water will leak out simultaneously with the slow discharge of the gap. Utility Model Content

[0006] In view of the above problems, the main purpose of the utility model is to provide an automatic and sufficient exhaust structure for a vertical pump with a main exhaust system and an auxiliary exhaust system, which can automatically, fully and quickly exhaust the gas in the pump chamber and the protective tube chamber during the startup of the water pump, making the unit safer and more stable in operation, while also extending the service life of wearing parts and reducing operating and maintenance costs.

[0007] The utility model solves the above technical problems through the following technical solutions: an automatic full exhaust structure for a vertical pump, the automatic full exhaust structure for a vertical pump comprising: a main exhaust system and a secondary exhaust system.

[0008] The main exhaust system includes a water outlet elbow, a pump cover, and a main exhaust valve; the pump cover is installed on the top of the water outlet elbow, and the main exhaust valve is installed on the top of the pump cover through fasteners.

[0009] The auxiliary exhaust system includes a main shaft, a guide bearing, a packing seal component, and an auxiliary exhaust valve; the main shaft, the guide bearing, and the packing seal component constitute an inner cavity, the guide bearing and the stuffing box component are both installed on the pump cover, and the auxiliary exhaust valve is installed on the packing seal component and is located at the top of the inner cavity.

[0010] The main shaft is a rotating part, and the guide bearing is located outside the main shaft, and the guide bearing is a non-rotating part.

[0011] In a specific implementation example of the utility model, the stuffing box component reserves an external clean water inlet in the form of a flange connection.

[0012] In a specific implementation example of the utility model, the guide bearing is fixed to the pump cover by a fastener.

[0013] In a specific implementation example of the utility model, the guide bearing is positioned with the inner hole and the end face of the pump cover by means of bolt connection.

[0014] In a specific implementation example of the utility model, a shaft protection tube is arranged outside the main shaft of the water pump.

[0015] In a specific implementation example of the present utility model, the number of guide bearings ranges from 2 to 5 sets.

[0016] The positive progressive effect of the utility model is that the automatic full exhaust structure for the vertical pump proposed by the utility model, during the startup process of the water pump, the medium rises under the rotation of the water pump, which will quickly compress the gas originally in the pump chamber to the top of the pump chamber, and quickly, fully and timely discharge the gas in the pump chamber through the main exhaust valve, avoiding the problem that a part of the gas in the original structure cannot be discharged through the exhaust valve and is compressed at the top of the pump chamber, resulting in vibration, irregular noise and even cavitation during the operation of the unit, causing damage to the water pump and posing a huge hidden danger to the safe and stable operation of the unit.

[0017] The utility model is also suitable for harsh working conditions when the medium contains mud, sand, granular debris, etc., and an auxiliary exhaust system is added to the inner cavity of the shaft protection tube, thereby solving the problem that the inner cavity gas cannot be discharged and the guide bearing of the wearing part cannot operate under clean external water conditions. The service life of the guide bearing of the wearing part can be increased by 2-3 times, and the maintenance cycle is extended from inspection every 1 year to inspection every 2 years and maintenance every 3 years, which greatly reduces the cost of pump station operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the existing exhaust system structure.

[0019] Figure 2 for Figure 1 An enlarged view of the upper part of .

[0020] Figure 3 It is a structural schematic diagram of the utility model.

[0021] Figure 4 for Figure 3 An enlarged view of the upper part of .

[0022] The following are the names corresponding to the label numbers in this utility model:

[0023] Main exhaust valve 1, auxiliary exhaust valve 2, pump cover 3, water outlet elbow 4, main shaft 5, packing seal component 6, guide bearing 7, shaft protection tube 8. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0025] Figure 2 It is a schematic diagram of the structure of the utility model, such as Figure 2 As shown: the utility model proposes an automatic full exhaust structure for a vertical pump, which includes: a main exhaust system and a secondary exhaust system. The main exhaust system includes a water outlet elbow 4, a pump cover 3, and a main exhaust valve 1; the pump cover 3 is installed on the top of the water outlet elbow 4, and the main exhaust valve 1 is installed on the top of the pump cover 3 through fasteners, so that the gas in the pump cavity can be discharged quickly, fully and timely.

[0026] The auxiliary exhaust system includes a main shaft 5, a guide bearing 7, a packing seal component 6, and an auxiliary exhaust valve 2; the main shaft 5, the guide bearing 7, and the packing seal component 6 constitute an inner cavity, the guide bearing 7 and the stuffing box component 6 are both installed on the pump cover 3, and the auxiliary exhaust valve is installed on the packing seal component 6 and is located at the topmost position of the inner cavity; the main shaft 5 is a rotating part, the guide bearing 7 is located outside the main shaft 5 and is a non-rotating part, and a shaft protection tube 8 is arranged outside the main shaft 5 of the water pump.

[0027] The packing seal component 6 is reserved with an external clean water inlet in the form of a flange connection. When the water pump medium contains mud, sand, granular debris and other harsh working conditions, clean water can be connected to enter the inner cavity. The clean water first passes through the stuffing box component, and then flows down along the water groove between the guide bearing and the main shaft, all the way to the lowest guide bearing of the vertical pump.

[0028] The guide bearing 7 is positioned with the inner hole and end face of the pump cover 3 by means of bolt connection.

[0029] In the main exhaust system of the utility model, during the startup of the water pump, the rising medium will quickly compress the gas originally in the pump chamber to the top of the pump chamber. If it cannot be discharged in time, it will cause the water pump to vibrate and make irregular noises, and in more serious cases, cavitation will occur, which brings a very big hidden danger to the operation of the unit. The main exhaust system can solve this problem through the top main exhaust valve.

[0030] The utility model reserves an external clean water inlet on the stuffing box component. When the water pump medium contains mud, sand, granular impurities and the medium is relatively bad, clean pressure water can be connected through the external flushing water inlet to protect the guide bearing of the easily worn parts.

[0031] In order to ensure that the external flushing water can fully play the role of flushing protection, a shaft protection tube 8 is arranged outside the main shaft of the water pump to isolate the medium so that the guide bearing runs under the condition of clean external flushing water, thereby extending the service life of the guide bearing.

[0032] The utility model adds a secondary exhaust system. During the start-up process of the water pump, the rising medium will quickly compress the gas originally in the shaft protection tube to the stuffing box component. The secondary exhaust valve in the secondary exhaust system can quickly discharge this part of the gas, allowing the external clean flushing water to flow smoothly downward from the internal space of the shaft protection tube, thereby flushing and protecting the guide bearing, and extending the service life of the guide bearing.

[0033] The main shaft 5 in the present invention is a rotating part, and the guide bearing 7 is located outside the main shaft 5 and is a non-rotating part. Therefore, the guide bearing 7 will wear during operation and is a wearing part.

[0034] The length of the vertical pump in the utility model is different, and the number of guide bearings 7 is also different. A vertical pump is provided with at least 2 guide bearings. Generally, the longer the length of the vertical pump is, the more the number of guide bearings 7 is, and generally 2-5 sets can be provided.

[0035] The stuffing box component 6 in the utility model is reserved with an external clean water inlet in the form of a flange connection. When the water pump medium contains mud, sand, granular debris and other severe working conditions, clean water can be connected to enter the inner cavity. The clean water first passes through the stuffing box component, and then flows down along the water trough between the guide bearing and the main shaft, and flows all the way to the lowest guide bearing of the vertical pump.

[0036] In order to ensure that the external clean water can play a good protective role on each vulnerable guide bearing, the gas in the inner cavity needs to be discharged through the auxiliary exhaust valve to allow the clean water to flow smoothly to the bottom guide bearing. At the same time, the pressure of the external clean water is generally 1.5 times the medium pressure of the water pump itself, that is, the pressure of the external clean water is generally 1.5 times the head of the water pump.

[0037] During the startup of the water pump, the utility model drives the medium to rise under the rotation of the water pump, which will quickly compress the gas originally in the pump chamber to the top of the pump chamber, and quickly, fully and timely discharge the gas in the pump chamber through the main exhaust valve, thereby avoiding the problem that a part of the gas in the original structure cannot be discharged through the exhaust valve and is compressed at the top of the pump chamber, resulting in vibration, irregular noise and even cavitation during the operation of the unit, causing damage to the water pump and posing a huge hidden danger to the safe and stable operation of the unit.

[0038] The utility model is also suitable for harsh working conditions when the medium contains mud, sand, granular debris, etc., and an auxiliary exhaust system is added to the inner cavity of the shaft protection tube, thereby solving the problem that the inner cavity gas cannot be discharged and the guide bearing of the wearing part cannot operate under clean external water conditions. The service life of the guide bearing of the wearing part can be increased by 2-3 times, and the maintenance cycle is extended from inspection every 1 year to inspection every 2 years and maintenance every 3 years, which greatly reduces the cost of pump station operation and maintenance.

[0039] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An automatic full exhaust structure for a vertical pump, characterized in that: The automatic full exhaust structure for the vertical pump comprises: a main exhaust system and a secondary exhaust system, The main exhaust system includes a water outlet elbow, a pump cover, and a main exhaust valve; the pump cover is installed on the top of the water outlet elbow, and the main exhaust valve is installed on the top of the pump cover through fasteners; The auxiliary exhaust system includes a main shaft, a guide bearing, a packing seal component, and an auxiliary exhaust valve; the main shaft, the guide bearing, and the packing seal component form an inner cavity, the guide bearing and the stuffing box component are both installed on the pump cover, and the auxiliary exhaust valve is installed on the packing seal component and is located at the top of the inner cavity; The main shaft is a rotating part, and the guide bearing is located outside the main shaft, and the guide bearing is a non-rotating part.

2. The automatic full exhaust structure for a vertical pump according to claim 1, characterized in that: The stuffing box component has a reserved external clean water inlet in the form of flange connection.

3. The automatic full exhaust structure for a vertical pump according to claim 1, characterized in that: The guide bearing is fixed to the pump cover by fasteners.

4. The automatic full exhaust structure for a vertical pump according to claim 1, characterized in that: The guide bearing is positioned with the inner hole and end face of the pump cover by means of bolt connection.

5. The automatic full exhaust structure for a vertical pump according to claim 1, characterized in that: A shaft protection tube is arranged outside the main shaft of the water pump.

6. The automatic full exhaust structure for a vertical pump according to claim 1, characterized in that: The number of guide bearings ranges from 2 to 5 sets.

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