CN205173559U - Overflow case - Google Patents

Abstract

The utility model provides an overflow case, belongs to industrial cleaning technical field, handheld spray gun of mainly used high pressure and overflow type foot valve etc.. Gland including valve body and valve body front end still includes the valve rod to and penetrate little disk seat and copper sheathing in the valve body in proper order through the valve body front end, the valve rod penetrate in the copper sheathing from the valve body rear end. This overflow case has increased little disk seat on the basis of present overflow case research and development technique, the hermetic unit adopts the tapering between valve rod and the little disk seat to seal up the static seal sealing method with the combination of plastics retaining ring with " O " shape rubber seal, whole case has increased little disk seat, and messenger's total is more perfect, processing is more convenient, and the pottery or the carbide materials processing of high rigidity can be used to valve rod and little disk seat, and the vulnerable part can be changed, keeped in repair and maintain very conveniently alone, and life is longer, and use cost reduces by a wide margin.

Description

A kind of overflow spool

Technical field

The utility model, belongs to industry cleaning link technical field, and this product is mainly used in high pressure hand-hold lance boom and overfalling type foot valve etc.

Background technique

The industry development of Chinese industrial cleaning industry is started in the eighties in last century, lags far behind the developed countries such as the Europe, the United States with last 100 years history, and initial still based on chemical cleaning.Along with China's reform and opening-up and the quickening of modernization construction paces; and compatriots are to the reinforcement of environmental protection consciousness; Cleaning by High Pressure Water Jet technique accept by increasing enterprise, main cause has three aspects: can not produce secondary pollution after fast (2) cleaning performance good (3) cleaning of (1) cleaning speed.

Overfalling type spool is mainly used in high pressure hand-hold lance boom and overfalling type foot valve etc., and being a kind of efficient, multiduty water jet cleaning instrument, is that cleaning equipment is standing.But, because the high-end engineering goods manufacture level of China more also exists a certain distance with developed countries such as Europe, the United States, up to the present, domestic this used series products is almost all from external import, domestic manufacturer does not also possess throughput, and main cause is from four aspects: (1) main raw material(s) is difficult to ensure that (2) parts machining precision high (3) design concept falls behind or professional lacks.And existing overflow spool difficulty of processing is large, need whole valve body to change together after the prooving of valve seat, cause very large waste, user cost is high.

Summary of the invention

The utility model object solves domestic existing overflow spool difficulty of processing greatly, needs whole valve body to change together (waste), the shortcoming that user cost is high, devise a kind of Novel overflow valve core after the prooving of valve seat.Compared with existing overflow spool, the utility model total is more perfect, it is convenient to process, dismounting is more flexible, labor intensity of operating staff reduces, working efficiency is higher, valve rod and little valve seat can be processed with the pottery of high hardness or Hardmetal materials, easily damaged parts can be changed separately, maintenance process simulation is very convenient, and user cost significantly reduces.

Technical solutions of the utility model:

A kind of overflow spool, comprises the gland of valve body and valve body front end, also comprises valve rod, and penetrates little valve seat in valve body and copper sheathing successively by valve body front end, and described valve rod penetrates in copper sheathing from valve rear end.

Further, little valve seat center is axially arranged with through passage.

Further, described little valve seat and valve stem end contacting part are taper sealing, and when valve rod is away from little valve seat, little valve seat central passage is connected with the bypass channel formed between valve rod with valve body.

Further, spring is provided with between described valve rod outer end and valve body.

Further, also comprise the static seal structure that " O " shape rubber seal and plastic seal back-up ring combine, this static seal structure comprises: little valve seat " O " the shape rubber seal be provided with at the binding site of little valve seat and valve body and little valve seat plastic seal back-up ring, at valve rod and body base binding site, valve rod " O " the shape rubber seal be provided with and valve rod plastic seal back-up ring, two groups of valve body " O " the shape rubber seal be provided with at the outside upper-lower position of valve body and valve body plastic seal back-up ring.

Further, gland is connected by step with valve body front end.

Further, valve rod and little valve seat are pottery or Hardmetal materials.

Advantage of the present utility model and good effect:

The utility model is mainly used in high pressure hand-hold lance boom, overfalling type foot valve etc., perfect by structural design, compared with existing overflow spool, (1) structure more perfect, process convenient: (2) valve rod and little valve seat can with the pottery of high hardness or Hardmetal materials processing, longer service life; (2) dismounting more flexibly, easily damaged parts can change separately, and keep in repair, maintain very convenient, user cost significantly reduces.

Accompanying drawing explanation

Fig. 1 overfalling type spool assembling schematic diagram;

Fig. 2 overfalling type seal spool schematic diagram;

Fig. 3 overfalling type spool not working condition schematic diagram;

Fig. 4 overfalling type spool working procedure schematic diagram

In figure, 1, gland, 2, little valve seat, 3, valve body, 4, copper sheathing, 5, spring, 6, valve rod, 7, valve rod plastic seal back-up ring, 8, valve rod " O " shape rubber seal, 9, valve body plastic seal back-up ring, 10, valve body " O " shape rubber seal, 11, little valve seat " O " shape rubber seal, 12, little valve seat plastic seal back-up ring.

Embodiment

Embodiment 1:

See accompanying drawing 1, the utility model overflow spool, gland 1 is connected by step with valve body 3 front end, and center is axially arranged with the little valve seat 2 of through passage and copper sheathing 4 is penetrated in valve body successively by valve body 3 front end, and valve rod 6 penetrates in copper sheathing 4 from valve rear end.Bypass channel is formed between valve rod and valve body.

The static seal structure that hermetic unit of the present utility model adopts the taper sealing (shown in Figure 2) of valve rod 6 and little valve seat 2 and " O " shape rubber seal and plastic seal back-up ring to combine.The position that this static seal structure is arranged comprises: at the binding site of little valve seat 2 with valve body 3, be provided with little valve seat " O " shape rubber seal 11 and little valve seat plastic seal back-up ring 12, binding site bottom valve rod 6 with valve body 3, be provided with valve rod " O " shape rubber seal 8 and valve rod plastic seal back-up ring 7, these two groups of sealing configurations ensure that little valve seat 2 and the sealing effect between valve rod 6 and valve body 3.Be provided with two groups of valve body " O " shape rubber seal 10 and valve body plastic seal back-up ring 9 at the outside upper-lower position of valve body 3, these two groups of sealing configurations are sealing effects when ensureing valve body 3 and other equipment connections.

Working procedure of the present utility model is as shown in accompanying drawing 3 and accompanying drawing 4:

Fig. 3 is not working condition schematic diagram.As shown in Figure 3, the utility model is after putting into high pressure hand-hold lance boom or overfalling type foot valve etc., in idle situation, the cone sealing of valve rod 6 and little valve seat 2 is opened, formed water channel between in valve body and bottom gland, now high pressure water is flowed out along shown in arrow by the central passage of the bypass channel between valve rod 6 and valve body 3 and little valve seat 2; See Fig. 4, when after the given certain pressures such as high pressure hand-hold lance boom or overfalling type foot valve, valve rod 6 moves to gland 1 direction, the cone seal closure of valve rod 6 and little valve seat 2, is formed straight through water channel at valve body 3 two ends, and high pressure water is through scheming the ejection of shown direction.

The utility model is a kind of water jet cleaning instrument that high-pressure wash is commonly used, and main advantage is:

Configuration aspects adds little valve seat 2, make structure more perfect, process convenient, dismounting is more flexible, valve rod 6 and little valve seat 2 can be processed with the pottery of high hardness or Hardmetal materials, longer service life, easily damaged parts can be changed separately, maintenance, maintain very convenient, user cost significantly reduces, and reduce operator labor intensity, increase work efficiency.

Claims (7)

1. an overflow spool, comprises the gland of valve body and valve body front end, also comprises valve rod, and penetrates little valve seat in valve body and copper sheathing successively by valve body front end, and described valve rod penetrates in copper sheathing from valve rear end.

2. overflow spool according to claim 1, is characterized in that: little valve seat center is axially arranged with through passage.

3. overflow spool according to claim 2, is characterized in that: described little valve seat and valve stem end contacting part are taper sealing, and when valve rod is away from little valve seat, little valve seat central passage is connected with the bypass channel formed between valve rod with valve body.

4. overflow spool according to claim 1, is characterized in that: be provided with spring between described valve rod outer end and valve body.

5. overflow spool according to claim 1, it is characterized in that: also comprise the static seal structure that " O " shape rubber seal and plastic seal back-up ring combine, this static seal structure comprises: little valve seat " O " the shape rubber seal be provided with at the binding site of little valve seat and valve body and little valve seat plastic seal back-up ring, at valve rod and body base binding site, valve rod " O " the shape rubber seal be provided with and valve rod plastic seal back-up ring, two groups of valve body " O " the shape rubber seal be provided with at the outside upper-lower position of valve body and valve body plastic seal back-up ring.

6. overflow spool according to claim 1, is characterized in that: gland is connected by step with valve body front end.

7. overflow spool according to claim 1, is characterized in that: valve rod and little valve seat are pottery or Hardmetal materials.