CN201463871U - Flap valve opening angle measuring device - Google Patents

Abstract

The utility model relates to a flap valve opening angle measuring device, in particular to a device capable of measuring the flap valve opening angle of a flap valve at the outlet of the water outlet pipeline of a water pump and mastering the energy source consumption situations during the water pump operation. The plat valve is a one-way valve arranged at the water outlet of the water outlet pipeline of the water pump, the top of the flap valve is connected with a valve seat through a hinge, after the water pump is started, the flap valve is automatically opened under the action of the water flow impact, during normal valve stop or fault valve stop, and the flap valve is automatically closed under the action of the self gravity and the reverse flowing water pressure for preventing the water in a water outlet pool from flowing backwards to influence the safety of a pump set. The value of the local water head loss factor of the flap valve has a relation with the opening angle, the local water head loss factor directly influences the loss magnitude of the water head and the energy source consumption value in the water pump operation. The flap valve opening angle measuring device works out the flap valve opening angle through the geometrical relationship of the measuring device and the distance difference of from the bottom of a balance weight to the bottom of a transverse bracket of the measuring device when the flap valve is opened and closed.

Description

Flap valve opening angle measurement mechanism

1. affiliated technical field

The utility model relates to flap valve opening angle measurement mechanism, especially can measure the opening angle of pumping line way outlet place flap valve, the energy resource consumption situation when grasping water pump operation.

2. background technology

Flap valve is mounted in the unilateral gate at water pump water outlet pipeline water delivering orifice place, and the flap valve top links to each other with gate seat with hinge, and after the starting mode of pump, under the effect of water flow impact pressure, flap valve is opened automatically; When normal termination of pumping or pumping accident, flap valve relies on the effect of deadweight and refluence water pressure to close automatically, lets out with the water that prevents discharge bay, influences the safety of water pump assembly.Flap valve is one of main cutout mode of water pump.Because it is simple in structure, cost is lower, convenient management and be convenient to the pumping plant management and realize advantages such as robotization control, has obtained using widely in pumping plant.

The size of local head loss's coefficient of flap valve is relevant with its opening angle.When opening angle was 60 °, local head loss's coefficient was 0.1; When reducing to 20 ° as opening angle, local head loss's coefficient rises to 2.5.The size of energy resource consumption when the size of local head loss's coefficient directly has influence on the size of the loss of flood peak and water pump operation.The more little loss of flood peak of flap valve opening angle is big more, and the energy of consumption is many more.What of energy resource consumption when therefore, the size of flap valve opening angle directly has influence on water pump operation.

3. summary of the invention

For increasing the opening angle of flap valve, improve the operational efficiency of water pump, reduce energy resource consumption, adopting balance bob is a kind of simple and easy to do, better method of effect.Be a wire rope on the cover plate of flap valve, this rope is walked around pulley, and the other end is hung balance bob, sees Figure of description for details.

In order to grasp the situation of change that installs balance bob front and back flap valve opening angle additional, the opening angle of flap valve need be measured when flap valve was installed additional balance bob front and back water pump operation.Developed the measurement mechanism of flap valve opening angle for this reason.The balance bob bottom distance at the bottom of the measurement mechanism lateral frame was h when flap valve was closed ₁Flap valve is opened during water pump operation, balance bob moves down, measure the balance bob bottom distance at the bottom of the measurement mechanism lateral frame then, the geometric relationship of the difference of the distance of balance bob bottom at the bottom of the measurement mechanism lateral frame and measurement mechanism calculates the opening angle of flap valve when closing and opening by flap valve.

Distance L between two pulley spindles is 1.60m, the radius L of pulley ₁Be 0.10m, the distance h of balance bob bottom to measurement mechanism lateral frame bottom ₁, h ₁=0.60m, L _PFlap valve suspension ring to the distance of door hinge line is 0.70m.

Calculating formula according to the geometric relationship flap valve opening angle of measurement mechanism is

$\sin \mathrm{\α}=\sqrt{\frac{h}{L_P}}---\left(1\right)$

H in the formula---be the height that balance bob falls, m;

L in the formula (1) _PTo concrete flap valve is definite value, records the height h that balance bob falls, and can calculate the opening angle α of flap valve.

The beneficial effects of the utility model are, simple in structure, be easy to processing and fabricating, cost is low, observation is convenient.In pumping plant is measured, have wide application value, operational efficiency, minimizing energy resource consumption, the reduction operating cost that improves water pump had important facilitation.

4. description of drawings

Fig. 1 is flap valve opening angle measurement mechanism figure, is made up of support, pulley, wire rope, balance bob etc.

5. embodiment

Below in conjunction with implementing the utility model is further specified.

Flap valve opening angle measurement mechanism is made up of support, pulley, wire rope, balance bob etc.Fasten wire rope 6 on the cover plate 2 of flap valve, this rope is walked around pulley 5, and the other end is hung balance bob 7.After recording the height h of balance bob whereabouts, can calculate the opening angle α of flap valve according to the geometric relationship of measurement mechanism by formula (1).

After recording the height h of balance bob whereabouts, can calculate the opening angle α of flap valve according to the geometric relationship of measurement mechanism by formula (1).

Claims (1)

1. flap valve opening angle measurement mechanism is made up of support, pulley, wire rope, balance bob etc., and it is characterized in that: fasten wire rope (6) on the cover plate (2) of flap valve, this rope is walked around pulley (5), and the other end is hung balance bob (7).

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