Manual and automatic comprehensive exhaust device for inlet pipeline of water supply pump set

Abstract

The utility model discloses a water supply pump set inlet pipeline manual and automatic comprehensive exhaust device which comprises a pump set inlet pipeline, the top of the pump set inlet pipeline is connected with a collecting pipe through a 90-degree elbow, and the collecting pipe is connected with a water pump inlet. The top of the pump set inlet pipeline is connected with a mechanical automatic exhaust valve through an exhaust pipeline, and the mechanical automatic exhaust valve is firstly connected with an electric exhaust valve and a manual exhaust valve which are arranged in parallel through the exhaust pipeline and then connected into a pump room pit through the exhaust pipeline. A plurality of groups of staggered water retaining guide plates are arranged in the pump room pit; and liquid level sensors are arranged at the rear ends of the water retaining guide plates. The bottom of the pump room pit is connected with a pit drainage pipe; the mechanical automatic exhaust valve, the electric exhaust valve and the manual exhaust valve are modularly and integrally arranged on the same automatic exhaust device to form a multi-stage exhaust system, so that the exhaust speed and the exhaust amount are increased, the failure rate of the exhaust device is reduced, and normal operation of water supply equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment equipment, in particular to a manual and automatic comprehensive exhaust device for an inlet pipeline of a water supply pump group. Background Art

[0002] Water pump cavitation reduces the flow, head, power and efficiency of the pump, causes vibration and noise of the unit, shortens the life of the equipment and affects the safety of water supply. Therefore, it is necessary to exhaust the air at the inlet pipe of the pump unit. Usually, the pump unit pipeline is exhausted by installing a mechanical automatic exhaust valve at the highest point of the main inlet pipe of the pump unit. When gas overflows in the system, the gas will climb up along the pipe and eventually gather at the highest point of the system, and the exhaust valve is generally installed at the highest point of the system. When the gas enters the exhaust valve cavity and gathers at the upper part of the exhaust valve, the pressure rises as the gas in the valve increases. When the gas pressure is greater than the system pressure, the gas will cause the water level in the cavity to drop, and the float will drop with the water level, opening the exhaust port; after the gas is exhausted, the water level rises, and the float also rises, closing the exhaust port. In this way, the purpose of automatic exhaust of pipelines is achieved; since the primary pump station intermittently supplies water to the secondary pump station in Gaoping area, water needs to be supplied to some users along the way. Therefore, during the period when the pump station is out of service, part of the pipeline from the primary pump station to the secondary pump station will be emptied. When the secondary pump station starts the pump unit, a large amount of gas will gather at the highest point of the secondary pump station inlet main pipe. Although a mechanical automatic exhaust valve is installed here, the exhaust speed of the mechanical automatic exhaust valve is too slow, affecting the normal opening of the pump unit; secondly, the failure rate of the mechanical automatic exhaust valve is relatively high, and there are failures such as automatic non-exhaust and water leakage. During long-term operation, the operating staff on duty need to manually exhaust the gas before the pump unit can be started normally. In the long run, the pump station cannot meet the requirements of unmanned operation.

[0003] In order to address this shortcoming, this patent installs a manual exhaust valve, a mechanical automatic exhaust valve and an electric exhaust valve at the high point of the water pump inlet pipe, and the outlet pipes of these three valves are combined into one pipe to discharge into the pump room pit. At the same time, a liquid level sensor or liquid level switch is installed on the upper part of the pump room pit, and two water baffles are installed inside the pit to prevent water from splashing onto the liquid level sensor or liquid level switch and affecting the measurement precision and accuracy. The electric exhaust valve and the liquid level sensor are interlocked through electrical control. When the liquid level reaches a certain value, the electric exhaust valve is interlocked and closed. At the same time, the control signal of the electric exhaust valve is connected to the PLC for remote control. It not only retains the functions of the exhaust valve and the manual exhaust function, but also realizes remote automatic / manual exhaust control through PLC programming, which improves the exhaust efficiency and solves the problem that the operating staff on duty must go to the site to manually exhaust. Utility Model Content

[0004] The utility model aims to provide a manual and automatic integrated exhaust device for the inlet pipeline of a water supply pump group to solve the problems raised in the background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A manual and automatic integrated exhaust device for the inlet pipeline of a water supply pump group comprises an inlet pipeline of a pump group, the top of the inlet pipeline of the pump group is connected to a manifold through a 90° elbow, and the manifold is connected to the inlet of a water pump; the top of the inlet pipeline of the pump group is connected to a mechanical automatic exhaust valve through an exhaust pipeline, the mechanical automatic exhaust valve is firstly connected to an electric exhaust valve and a manual exhaust valve respectively arranged in parallel with each other through the exhaust pipeline, and then connected to a pit in a pump room through the exhaust pipeline;

[0007] An array of staggeredly distributed water retaining and guide plates are arranged in the pump house pit, and a liquid level sensor is arranged at the rear end of the water retaining and guide plate.

[0008] Preferably, a pit drain pipe is connected to the bottom of the pump room pit.

[0009] The working principle of the utility model is:

[0010] According to the principle of upward gas source, mechanical automatic exhaust valve, manual exhaust valve and electric exhaust valve are installed at the highest point of the pump group inlet pipeline respectively, so as to exhaust the gas in the pipeline.

[0011] When there is a small amount of compressed air in the inlet pipe of the pump unit, the mechanical automatic exhaust valve installed at the front will automatically open to exhaust. However, during the exhaust process, when the moisture content in the gas reaches a certain level, the mechanical automatic exhaust valve will automatically close.

[0012] At this time, the electric exhaust valve opens to further exhaust the gas in the pipeline. At the same time, the electric exhaust valve and the liquid level sensor are interlocked through electrical control. Due to the pressure difference between the water pressure in the exhaust pipe and the water pressure in the pit drainage pipe, when a large amount of water is discharged from the exhaust pipe, the water level in the pump room pit will gradually rise. After the liquid level rises to a certain value, the liquid level sensor will act to interlock and close the electric exhaust valve. At the same time, the control signal of the electric exhaust valve is connected to the PLC to realize remote control. The on-duty personnel can remotely switch the electric exhaust valve to realize remote automatic exhaust function.

[0013] At the same time, when manual exhaust operation is required, the manual exhaust valve can be opened for manual exhaust.

[0014] The setting of the water baffle prevents water from splashing onto the liquid level sensor and affecting the measurement precision and accuracy.

[0015] The beneficial effects of the utility model are:

[0016] (1) A manual exhaust valve, a mechanical automatic exhaust valve, and an electric exhaust valve are installed at the high point of the inlet pipeline of the water pump in the present utility model. The outlet pipelines of these three valves are aggregated into one pipeline and discharged into the pump house pit. At the same time, a liquid level sensor or a liquid level switch is installed above the pump house pit. The electric exhaust valve and the liquid level sensor are interlocked through electrical control. When the liquid level reaches a certain value, the electric exhaust valve is interlocked and closed. At the same time, the control signal of the electric exhaust valve is connected to the PLC to achieve remote control. It not only retains the functions of the exhaust valve and manual exhaust, but also realizes remote automatic / manual control of exhaust through PLC programming, improving the exhaust efficiency and solving the problem that the on-duty operator must go to the site for manual exhaust.

[0017] (2) In the present utility model, the mechanical automatic exhaust valve, the electric exhaust valve, and the manual exhaust valve are modularly integrated on the same automatic exhaust device to form a multi-stage exhaust system, increasing the exhaust speed and exhaust volume while reducing the failure rate of the exhaust device and ensuring the normal operation of the water supply equipment.

[0018] (3) Two water-blocking and guiding plates are installed inside the pit of the present utility model to prevent water splashes from splashing onto the liquid level sensor or the liquid level switch, affecting the measurement accuracy and accuracy, and ensuring the interlock control between the electric exhaust valve and the liquid level sensor through electrical control. Description of the Drawings

[0019] Figure 1 is the top view of the present utility model;

[0020] Figure 2 is the side view of the present utility model;

[0021] In the figure: 1. Electric exhaust valve; 2. Manual exhaust valve; 3. Mechanical automatic exhaust valve; 4. Pump house pit; 5. Liquid level sensor; 6. Confluence pipe of the pump group; 7. Inlet pipeline of the pump group; 8. Water-blocking and guiding plate; 9. Pit drain pipe; 10. Exhaust pipeline. Detailed Implementation Manner

[0022] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Such as Figure 1-2A manual and automatic integrated exhaust device for the inlet pipeline of a water supply pump group as shown, including the pump group inlet pipeline 7. The top of the pump group inlet pipeline 7 is connected to the confluence pipe 6 through a 90° elbow, and the confluence pipe 6 is connected to the water pump inlet; a mechanical automatic exhaust valve 3 is connected to the top of the pump group inlet pipeline 7 through an exhaust pipeline. The mechanical automatic exhaust valve 3 is first connected to an electric exhaust valve 1 and a manual exhaust valve 2 arranged in parallel through the exhaust pipeline 10 respectively, and then accesses the pump house sump 4 through the exhaust pipeline 10; there are several groups of water retaining and guiding plates 8 distributed alternately in the pump house sump 4, and a liquid level sensor 5 is arranged at the rear end of the water retaining and guiding plate 8; the bottom of the pump house sump 4 is connected to a sump drain pipe 9.

[0024] The working principle of the present utility model:

[0025] According to the principle of the upward air source, a mechanical automatic exhaust valve 3, a manual exhaust valve 2 and an electric exhaust valve 1 are respectively installed at the highest point of the pump group inlet pipeline 7, so as to discharge the gas in the pipeline.

[0026] When there is a small amount of compressed air in the pump group inlet pipeline 7, the mechanical automatic exhaust valve 3 arranged at the front will automatically open for exhaust, but when the water content in the gas during the exhaust process reaches a certain content, the mechanical automatic exhaust valve 3 will automatically close.

[0027] At this time, the electric exhaust valve 1 opens to further empty the gas in the pipeline. At the same time, the electric exhaust valve 1 and the liquid level sensor 5 are interlocked through electrical control. Due to the pressure difference between the water pressure in the exhaust pipeline 10 and the water pressure in the sump drain pipe 9, when a large amount of water is discharged from the exhaust pipeline 10, the water level in the pump house sump 4 will gradually rise. When the liquid level rises to a certain value, the liquid level sensor 5 acts to interlock and close the electric exhaust valve 1; at the same time, the control signal of the electric exhaust valve 1 is connected to the PLC to realize remote control, and the duty personnel can remotely switch the electric exhaust valve 1 to realize the remote automatic exhaust function.

[0028] At the same time, when manual exhaust operation is required, the manual exhaust valve 2 can be opened for manual exhaust.

[0029] The setting of the water retaining and guiding plate 8 prevents water splashes from splashing onto the liquid level sensor 5 and affecting the measurement accuracy and accuracy.

[0030] A manual exhaust valve, a mechanical automatic exhaust valve and an electric exhaust valve are installed at the high point of the inlet pipeline of the water pump. The outlet pipelines of these three valves are aggregated into one pipeline and discharged into the pump house pit. At the same time, a liquid level sensor or a liquid level switch is installed above the pump house pit. The electric exhaust valve and the liquid level sensor are interlocked through electrical control. When the liquid level reaches a certain value, the electric exhaust valve is interlocked and closed. At the same time, the control signal of the electric exhaust valve is connected to the PLC to achieve remote control. It not only retains the functions of the exhaust valve and manual exhaust, but also realizes remote automatic / manual control of exhaust through PLC programming, improving the exhaust efficiency and solving the problem that the operation and maintenance personnel must go to the site for manual exhaust.

[0031] The above are only the preferred examples of the present utility model. It should be pointed out that for those of ordinary skill in the art, under the technical inspiration provided by the present utility model and as the common knowledge in the mechanical field, other equivalent variations and improvements can also be made, which should also be regarded as the protection scope of the present utility model.

Claims

1. A manual and automatic integrated exhaust device for the inlet pipeline of a water supply pump group, characterized in that: The pump unit inlet pipe (7) comprises a pump unit inlet pipe (7), the top of which is connected to a manifold (6) via a 90° elbow, and the manifold (6) is connected to a water pump inlet; the top of the pump unit inlet pipe (7) is connected to a mechanical automatic exhaust valve (3) via an exhaust pipe, the mechanical automatic exhaust valve (3) is firstly connected to an electric exhaust valve (1) and a manual exhaust valve (2) which are arranged in parallel with each other via an exhaust pipe (10), and then connected to a pump room pit (4) via the exhaust pipe (10); An array of staggeredly distributed water retaining and flow guide plates (8) are provided in the pump house pit (4), and a liquid level sensor (5) is provided at the rear end of the water retaining and flow guide plates (8).

2. According to claim 1, a manual and automatic integrated exhaust device for the inlet pipeline of a water supply pump group is characterized in that: The bottom of the pump room pit (4) is connected to a pit drainage pipe (9).

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