Water hammer impact eliminating system

Abstract

The utility model discloses a water hammer impact eliminating system which comprises a water sump, a water pump, a check valve, a multifunctional water pump control valve, a gate valve, a safety valve, an automatic exhaust valve, a first connecting water pipe and a second connecting water pipe. The first connecting water pipe is vertically arranged and perpendicular to the main pipeline, the tail end of the first connecting water pipe is communicated with the atmosphere, the tail end of the main pipeline is connected with the second connecting water pipe, the second connecting water pipe and the main pipeline are the same in pipeline direction, the first connecting water pipe is sequentially provided with a gate valve and a safety valve from bottom to top, and the second connecting water pipe is provided with an automatic exhaust valve. According to the utility model, a full-channel streamline straight-flow type design is adopted, the technical principles of slow opening, quick closing and slow closing for eliminating a water hammer are integrated, the water hammer phenomenon can be effectively eliminated, and the device is suitable for a complex working condition environment in a small underground space of a mine.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mine drainage technical field, concretely relates to a water hammer impact elimination system. BACKGROUND

[0002] In the present mine drainage system drainage pipeline, often involve pressurized water delivery, in this process will due to some external reasons (for example: valve suddenly closes, water pump unit suddenly stops etc.), make the water velocity suddenly changes, thereby cause instantaneous pressure is remarkable, repeatedly, rapidly change, thereby appear water hammer impact phenomenon. Check valve on the pipeline fails, also can appear water hammer impact phenomenon. When water hammer impact phenomenon occurs, the pressure of the pipeline can be many times of normal condition, make the pipe wall material bear very big pressure, and the repeated change of pressure, can cause the pipeline and equipment to vibrate greatly, serious can cause the damage of pipeline and pipeline accessories and equipment, this can put forward higher requirements to the pressure resistance and performance of pipeline equipment.

[0003] At present, the method for eliminating water hammer impact includes: (1) slowly open or close the pipeline valve; (2) shorten the pipeline length between valve and container; (3) set precise automatic water hammer elimination equipment. However, the above method can solve the water hammer impact in the pipeline to some extent, but the complex working conditions in the mine make it difficult to implement the traditional method for eliminating water hammer impact, specifically: first, some valves need to be opened or closed manually, which is difficult to operate in the limited space in the mine; second, it is difficult to shorten the pipeline length under the complex conditions in the mine; third, if the precise electronic automatic water hammer elimination equipment is powered off, it cannot be opened or closed, which may cause a major accident, and due to the unstable flow of the drainage work, the switch is more frequent, which will pose a great challenge to such water hammer elimination equipment. Therefore, it is necessary to develop a more simple and efficient water hammer impact elimination system that can solve the phenomenon of excessive instantaneous pressure caused by water hammer impact in the mine drainage pipeline. UTILITY MODEL CONTENTS

[0004] The utility model is aimed at providing a water hammer impact elimination system suitable for mine drainage, to solve the phenomenon of excessive instantaneous pressure caused by water hammer impact in the mine drainage pipeline, and to make it more simple and efficient.

[0005] The utility model discloses a purpose is realized like this, including water sump, water pump, check valve, multifunctional water pump control valve, gate valve, safety valve, automatic exhaust valve, first connecting water pipe and second connecting water pipe, the water sump is equipped with main pipeline, and water pump, check valve, multifunctional water pump control valve, first connecting water pipe are set gradually along the main pipeline water delivery direction, and first connecting water pipe is vertical to main pipeline and is set up, and first connecting water pipe end communicates atmosphere, the end of main pipeline connects second connecting water pipe, and second connecting water pipe pipeline trend is same with main pipeline pipeline trend, the first connecting water pipe is set gradually from below to above gate valve, safety valve, the second connecting water pipe is installed with automatic exhaust valve, and automatic exhaust valve is located the highest point or arch of pipeline system.

[0006] Preferably, the multifunctional water pump control valve is a water pump control valve with a water pump control gate valve, a check valve and a water hammer eliminator.

[0007] Preferably, the main pipeline is a DN400 or above drainage pipeline.

[0008] The utility model discloses the beneficial effect:

[0009] 1. The system as a whole adopts full-channel streamline straight-flow design, has small pressure loss, large flow, is suitable for complex working condition environment in small space underground mine, and integrates the technical principles of slow opening, quick closing and slow closing water hammer elimination, effectively eliminates water hammer of starting pump and stopping pump, has good effect, has high mechanization degree, and can be automatically operated without manual operation.

[0010] 2. The utility model is safer and more reliable, water hammer first impacts the safety valve, the safety valve releases pressure to the pipeline, and then impacts the multifunctional water pump control valve, which ensures the safety of the pipeline and prolongs the service life of the system. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The utility model discloses a structure schematic view;

[0012] In the drawing: 1-water sump, 2-water pump, 3-check valve, 4-multifunctional water pump control valve, 5-gate valve, 6-safety valve, 7-automatic exhaust valve, 8-main pipeline, 9-first connecting water pipe, 10-second connecting water pipe. DETAILED DESCRIPTION

[0013] The utility model will be further described below in combination with examples and drawings, but in any way, the utility model is limited, and any change or replacement based on the utility model teaching all belong to the protection scope of the utility model.

[0014] Example 1

[0015] As attached Figure 1 The utility model shown includes a water tank 1, a water pump 2, a check valve 3, a multi-functional water pump control valve 4, a gate valve 5, a safety valve 6, an automatic air vent valve 7, a first connecting water pipe 9, and a second connecting water pipe 10. The water tank 1 is provided with a main pipeline 8. The water pump 2, check valve 3, multi-functional water pump control valve 4, and first connecting water pipe 9 are arranged sequentially along the water conveyance direction of the main pipeline 8. The first connecting water pipe 9 is vertical and perpendicular to the main pipeline 8, and its end is open to the atmosphere. The end of the main pipeline 8 is connected to the second connecting water pipe 10, and the second connecting water pipe 10 has the same pipeline direction as the main pipeline 8. The first connecting water pipe 9 is provided with a gate valve 5 and a safety valve 6 sequentially from bottom to top. The second connecting water pipe 10 is equipped with an automatic air vent valve 7, which is located at the highest point of the pipeline system. The multi-functional water pump control valve 4 is a water pump control valve with a water pump control gate valve, a check valve, and a water hammer eliminator. The main pipeline 8 is a DN400 drainage pipeline.

[0016] The working principle and process of this utility model are as follows: Pump 2 draws water from tank 1 and discharges it through main pipe 8. Check valve 3 prevents backflow. When a valve suddenly closes or the pump unit suddenly stops, causing water hammer, the water hammer first impacts safety valve 6 (the safety valve's set value is less than the water hammer pressure but greater than the normal operating pressure of the pipeline system; the safety valve disc automatically opens when the set value is reached, representing the weakest link in the pipeline system; after the water hammer forms, it first impacts the safety valve, causing the safety valve disc to automatically open and release pressure). Safety valve 6 releases pressure from the pipeline. Afterwards, the remaining low-pressure water hammer... The re-impact on the multi-functional water pump control valve 4 ensures pipeline safety and extends its service life. The vertical installation of the first connecting water pipe 9 ensures that the safety valve 6 fully utilizes the gravity effect, avoiding adverse effects of pressure and gravity on its working accuracy. Vertical installation also improves the working accuracy of the safety valve 6 and extends its service life. The gate valve 5 is used for the maintenance and replacement of the safety valve 6 and is normally open. The second connecting water pipe 10 is the entire drainage pipeline after the safety valve 6. The automatic air vent valve 7 is used to remove gas from the pipeline, prevent cavitation, and reduce pipe wall damage, corrosion, and noise.

Claims

1. A water hammer shock elimination system comprising a water reservoir (1), a water pump (2), a check valve (3), a multifunctional water pump control valve (4), a gate valve (5), a safety valve (6), an automatic exhaust valve (7), a first connecting water pipe (9), and a second connecting water pipe (10), characterized in that The sump (1) is provided with a main pipeline (8), a water pump (2), a check valve (3), a multifunctional water pump control valve (4), and a first connecting water pipe (9) are sequentially arranged along the water conveying direction of the main pipeline (8), the check valve (3) is located at the outlet of the water pump (2), the first connecting water pipe (9) is vertically arranged and perpendicular to the main pipeline (8), the second connecting water pipe (10) is connected with the atmosphere at the end, the end of the main pipeline (8) is connected with the second connecting water pipe (10), and the pipeline direction of the second connecting water pipe (10) is the same as that of the main pipeline (8), the first connecting water pipe (9) is sequentially provided with a gate valve (5) and a safety valve (6) from bottom to top, and the second connecting water pipe (10) is provided with an automatic exhaust valve (7), and the automatic exhaust valve (7) is located at the highest point or the turning arch of the pipeline system.

2. The water hammer mitigation system of claim 1, wherein The multifunctional water pump control valve (4) is a water pump control valve provided with a water pump control gate valve, a check valve, and a water hammer eliminator.

3. The water hammer mitigation system of claim 1, wherein The main pipeline (8) is a DN400 and above drainage pipeline.

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