Emptying water drain valve of solar water heater and pneumatic clutch switch thereof

Abstract

The invention discloses an emptying water drain valve of a solar water heater and a pneumatic clutch switch thereof. The emptying water drain valve disclosed by the invention comprises a valve body and a valve rod, wherein the valve rod is in a hollow cylinder shape; two partition walls are arranged in the valve rod; the hollow cylinder shape of the valve rod is divided into an upper section, a middle section and a lower section; the upper section and the middle section are provided with through holes; the lower end of the valve rod is fixedly connected with a compression head; four valve rubber sleeves are arranged on the valve rod; a hermetic seal rubber sleeve is arranged on the compression head; the inner edge of each valve rubber sleeve is fixedly connected to the circumference of the valve rod; the outer edge of each valve rubber sleeve is fixedly connected to the cavity wall of the valve body; the inner edge of the air hermetic rubber sleeve is fixedly connected to the circumference of the compression head; the outer edge of the hermetic seal rubber sleeve is fixedly connected to the inner wall of a valve bottom cover; an air duct connector is arranged on the bottom cover of the valve; and the air duct connector is connected with the air duct of the pneumatic clutch switch. The emptying water drain valve disclosed by the invention is applied to the solar water heater, can prevent scale and abrasion, has the advantages of good sealing property, low cost, high emptying speed, no residual water in the valve and pipes, stable drain water flow, no bubble and strong waterpressure and effectively stops the freezing block of a water drain pipe in winter, and the pneumatic clutch switch disclosed by the invention is not influenced by air leakage and has the advantages of stable properties and long service life.

Description

technical field [0001] The invention relates to a valve for a solar water heater, in particular to an emptying and draining valve for a solar water heater and a pneumatic clutch switch used in conjunction with it. Background technique [0002] For water towers and reservoirs on high-rise buildings, especially solar water heaters, the antifreeze and normal use of the water pipes in winter is a problem that must be solved. The best solution to the problem is to empty the water in the pipes after each use . The choice of the emptying technology scheme determines the effect of emptying and water release, as well as the performance and life of the device. [0003] Most of the emptying valves in the prior art adopt electromagnetic exchange valves, but mechanical ones with reliable performance are rare. However, whether it is an electromagnetic type or a mechanical type, the core of the technology is blocking the valve. The pressure spool will wear out, and the rubber ring of th...

AI Technical Summary

Problems solved by technology

However, whether it is an electromagnetic type or a mechanical type, the core of the technology is blocking the valve. The pressure spool will wear out, and the rubber ring of the mechanical valve is also prone to wear and leakage, which will affect the water discharge effect; the scale in the solar water heater is also caused. The fatal factors of spool damage and failure to close, and the cost of electromagnetic exchange valve is relatively high

[0004] For the control of solar water heater pipeline emptying and water discharge valve, in addition to electromagnetic control in the existing technology, that is, mechanical control, the control types mainly include: clutch line switch control, airbag compression control, and piston compression control, while mechanical The most widely used control device is the metal clutch wire switch control device within 5 to 20 meters, but the control resistance of the metal clutch wire is large for a long distance, and it is easy to fail, corrode or even break. Reset, even difficult to reset, the compression delivery volume after reset is reduced, it is difficult to control in place; although the current piston compression pneumatic control has a long stroke, large and stable output and reset volume, but due to the large friction between the piston and the cylinder, then The pressure resistance is also large, so the wear is also fast. At the same time, it must have good sealing performance, otherwise it will affect the pneumatic output, reduce the control distance, and cause control failure.

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