CN202209435U - Sealing structure of relief valve coupler - Google Patents

Abstract

The utility model discloses a sealing structure of a relief valve coupler, which comprises a valve plug and a valve seat. The sealed end of the valve plug is a sealed seat face with a certain angle, and the sealed seat face is combined with a seal sharp edge in a valve seat hole. The sealing structure is characterized in that the valve seat hole sleeved on a valve plug taper sealed seat bottom face is an isometrical hole, and the hole opening inner corner of the valve seat hole is contacted with a circumferential face of a taper head. The valve seat hole connected with the valve plug taper head is designed to be the isometrical hole, sealed connection is achieved through contact between the hole opening inner corner of the valve seat hole and the taper head, so that stability of whole performance of sealing elements in a long-time repeated operation process is guaranteed. Simultaneously, the sealing structure not only greatly reduces processing difficulty, acceptability of the coupler can be improved by over 85%, invalidation of function and performance of the whole relief valve caused by small impurities in the medium oil can be avoided, and what is more important is that the sealing structure can be better in sealing effects in a certain using period along the prolonging of the using time.

Description

The sealing configuration of overflow valve coupling

Technical field

The utility model relates to pump, valve, is specifically related to relief valve.

Background technique

Generally speaking; In the sealing idol part that to medium is oil product, nearly all be the form that adopts the two-seater face seal, this seal form for engineering machinery for relief valve; Owing to receive the influence of actual state, applying working condition and the Environmental Conditions of working medium; Have many drawbacks, crucial is exactly because the influence of behaviour in service and Environmental Conditions makes medium oil more or less exist certain impurity; In case and will cause conical surface seal to lose efficacy in the impurity entering sealing cone, thereby cause the global failure of relief valve function and performance.Next is, the processing technique of two-seater face seal is had relatively high expectations, and technology is not easy to satisfy technical requirements, and passing rate of processing is lower, generally can only be about 60%.

Summary of the invention

The technical problem that the utility model will solve provides a kind of sealing configuration of overflow valve coupling, good sealing effect in its simple in structure, easy processing, the use.

The utility model is realized through following technological scheme:

The sealing configuration of overflow valve coupling comprises spool, valve seat, and said seal spool partly is the poppet valve core of several angle, and poppet valve core forms a sealing strip with the valve seat orifice back that contacts suitable for reading, and seal valve seat partly is a sharp edge.

The further improvement project of the utility model is, the poppet valve core contact segment of the sharp edge of seal valve seat and sealed valve core is a wire sealing strip, and valve seat orifice sealing sharp edge touches with tapering sealed seat surface side face mutually.

The utility model compared with prior art has the following advantages:

One, the utility model valve seat orifice that will combine with spool tapering head is designed to isometrical hole; Sharp edge through valve seat orifice touches (promptly adopting the sharp edge sealing technique) mutually and has realized being tightly connected with the tapering seat surface; Just combine through a sharp edge and the tapering that another is fit to; And the difference through metallographic structure after two part materials or the heat treatment, guaranteed the stability of Sealing overall performance in long-time running repeatedly.

Two, the sealing configuration of the utility model; Not only difficulty of processing reduces greatly; Idol part up-to-standard rate can be brought up to more than 85%, and can prevent to make owing to the existence of minute impurities in the medium oil inefficacy (spool and valve seat are stuck) of whole relief valve function and performance.What is more important, this sealing configuration can be in certain life cycle, along with the prolongation sealing effect of service time can be better.

Description of drawings

Fig. 1 is the axial cross-sectional schematic of the utility model.

Embodiment

As shown in Figure 1, the utility model comprises spool 1, valve seat 2, and said spool 1 sealed end is the tapering sealed seat surface of several angle, and the sealing sharp edge of sealed seat surface and valve seat is tightly connected.Still as shown in Figure 1, the valve seat orifice that is placed in spool 1 tapering sealed seat surface is isometrical hole, and touch with spool 1 tapering head side face mutually the corner in the aperture of valve seat orifice, and the poppet valve core contact segment of the sharp edge of seal valve seat and sealed valve core is a wire sealing strip.

Claims (2)

1. the sealing configuration of overflow valve coupling comprises spool (1), valve seat (2), it is characterized in that: said spool (1) hermetic unit is the poppet valve core of several angle, and poppet valve core forms a sealing strip with the valve seat orifice back that contacts suitable for reading, and seal valve seat partly is a sharp edge.

2. the sealing configuration of overflow valve coupling as claimed in claim 1 is characterized in that: the poppet valve core contact segment of the sharp edge of seal valve seat and sealed valve core is a wire sealing strip.

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