CN202927156U

CN202927156U - Plastic check valve

Info

Publication number: CN202927156U
Application number: CN 201220632325
Authority: CN
Inventors: 王永山
Original assignee: TIANJIN DAYU PLASTIC PRODUCT CO Ltd
Current assignee: TIANJIN DAYU PLASTIC PRODUCT CO Ltd
Priority date: 2012-11-26
Filing date: 2012-11-26
Publication date: 2013-05-08
Anticipated expiration: 2022-11-26

Abstract

The utility model provides a plastic check valve which comprises an upper valve body, a stopping ring, a valve core, a sealing ring and a lower valve body, wherein the sealing ring is arranged between the upper valve body and the lower valve body which are fixed by bolts; inner tube ports which are matched are formed in the upper valve body and the lower valve body, the inner tube port of the upper valve body and the inner tube port of the lower valve body are connected through the stopping ring, and the valve core is hinged in the position of the inner tube port of the lower valve body; and a steel plate protecting cover is arranged on the outer surface of the valve core, and a counterweight steel plate is arranged in the valve core. The plastic check valve has the beneficial effects that because the counterweight steel plate is arranged in the valve core, the injection molding difficulty in thickening the valve core is overcome, the processing is simple and convenient, no leakage occurs when tube pressure is less, and flow is not affected. The plastic check valve has the advantages of simple structure, long service life, high work efficiency, cost saving and the like.

Description

A kind of plastic cement safety check

Technical field

The utility model belongs to the pipeline valve field, especially relates to a kind of plastic cement safety check.

Background technique

Safety check in existing technology, can play and prevent that pipeline from refluxing and the effect of assurance pipeline pressure, this all leans on the opening and closing of the spool at center to realize, because the material of safety check own is the PVC material, wherein spool is also the PVC material, pipeline is when the water yield is few, pipeline pressure is too small, and spool can better not seal and produce seepage, if prevent that seepage from must thicken spool injection moulding thickness, hinder like this pipeline flow, increase the weight of the injection moulding difficulty.

Summary of the invention

Problem to be solved in the utility model be to provide a kind of simple in structure, solve an injection moulding difficult problem, save cost, a kind of plastic cement safety check that using effect is good, be particluarly suitable for preventing on pipeline using when current from refluxing.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of plastic cement safety check comprises upper valve body, drop-stopping ring, spool, seal ring, lower valve body; Be provided with seal ring between described upper valve body and lower valve body, and described upper valve body and lower valve body are bolted; Be equipped with the inner tube port that is complementary in described upper valve body and lower valve body, the inner tube port of described upper valve body is connected by drop-stopping ring with the inner tube port of lower valve body, and the inner tube port position of described lower valve body is hinged with spool; The outer surface of described spool is provided with the steel plate protecting cover, and described valve core inside is provided with the counterweight steel plate.

The counterweight steel plate of described spool can first be placed on the counterweight steel plate in mould when the injection moulding spool, and then the injection moulding spool, and this moment, counterweight steel plate and spool were one-body molded.

Advantage and the good effect that the utlity model has are: owing to adopting technique scheme, owing to being provided with the counterweight steel plate in spool, overcome the injection moulding difficulty of thickening spool, processed easyly, and hour non-leakage at pipeline pressure, do not affected flow; Have the advantages such as simple in structure, long service life, high working efficiency, saving cost.

Description of drawings

Fig. 1 is cross-sectional view of the present utility model;

Fig. 2 is the main TV structure schematic diagram of spool of the present utility model;

Fig. 3 is the side-looking structural representation of spool of the present utility model;

Fig. 4 is the decomposition texture schematic diagram of Fig. 3.

In figure:

1, upper valve body 2, drop-stopping ring 3, spool

4, seal ring 5, bolt 6, steel plate protecting cover

7, counterweight steel plate 8, lower valve body

Embodiment

As shown in Fig. 1,2,3,4, a kind of plastic cement safety check of the utility model comprises upper valve body 1, drop-stopping ring 2, spool 3, seal ring 4, lower valve body 8; Be provided with seal ring 4 between described upper valve body 1 and lower valve body 8, and described upper valve body 1 and lower valve body 8 is fixing by bolt 5; Be equipped with the inner tube port that is complementary in described upper valve body 1 and lower valve body 8, the inner tube port of described upper valve body 1 is connected by drop-stopping ring 2 with the inner tube port of lower valve body 8, and the inner tube port position of described lower valve body 8 is hinged with spool 3; The outer surface of described spool 3 is provided with steel plate protecting cover 6, and described spool 3 inside are provided with counterweight steel plate 7.

The counterweight steel plate 7 of described spool 3 can first be placed on counterweight steel plate 7 in mould when injection moulding spool 3, and then injection moulding spool 3, and this moment, counterweight steel plate 7 and spool 3 were one-body molded.

The working procedure of this example: owing to being provided with counterweight steel plate 7 in spool 3, overcome the injection moulding difficulty of thickening spool 3, processed easyly, and hour non-leakage at pipeline pressure, do not affected flow.

Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to be used to limiting practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., within all should still belonging to patent covering scope of the present utility model.

Claims

1. a plastic cement safety check, is characterized in that: comprise upper valve body, drop-stopping ring, spool, seal ring, lower valve body; Be provided with seal ring between described upper valve body and lower valve body, and described upper valve body and lower valve body are bolted; Be equipped with the inner tube port that is complementary in described upper valve body and lower valve body, the inner tube port of described upper valve body is connected by drop-stopping ring with the inner tube port of lower valve body, and the inner tube port position of described lower valve body is hinged with spool; The outer surface of described spool is provided with the steel plate protecting cover, and described valve core inside is provided with the counterweight steel plate.