CN202732176U - Choke plug - Google Patents

Abstract

The utility model relates to a choke plug. The choke plug comprises a sealed head and a valve rod fixedly connected with the sealed head. The valve rod is provided with a round-cut step, and the area of the round-cut step is greater than the bottom area of the sealed head. The round-cut step is closely attached to the lower portion of the sealed head. The choke plug has the advantages that due to the fact that the valve rod is provided with the round-cut step, the section face portion of the round-cut step can effectively prevent the choke plug from producing rotation when the choke plug works. The area of the round-cut step is greater than the bottom area of the sealed head, and therefore the backside pressure to the choke plug is enabled to be enlarged when a fuel pump stops rotating, and leakage rate is obviously reduced.

Description

A kind of choke plug

Technical field

The utility model relates to a kind of spool, relates in particular to a kind of choke plug for automobile electric fuel pump.

Background technique

The choke plug of prior art comprises sealing head and the valve rod that is fixedly connected with sealing head, and as shown in Figure 1, sealing head generally adopts spheric structure, and valve rod is the cylindrical body of many steps, easily produces from when its shortcoming is work then produces noise, seals not goodly, and leak-down rate is high.

The model utility content

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of choke plug of radially fixing, good sealing effect is provided.

To achieve these goals, technical solution of the present utility model is such: a kind of choke plug, comprise sealing head and the valve rod that is fixedly connected with sealing head, described valve rod is provided with and cuts the round platform rank, cut the area on round platform rank greater than the basal area of sealing head, cut the below that the round platform rank are close to sealing head.

The beneficial effects of the utility model are: valve rod is provided with and cuts the round platform rank, the cross-section of cutting the round platform rank can prevent effectively that choke plug from producing rotation when work, cut the area on round platform rank greater than the basal area of sealing head, the dorsad pressure of choke plug strengthens when making the fuel pump stall, and leak-down rate obviously descends.

Description of drawings

Fig. 1 is the structural representation of prior art;

Fig. 2 is structural representation of the present utility model;

Fig. 3 is the plan view of Fig. 2.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

Shown in Fig. 2-3, a kind of choke plug, comprise sealing head 1 and the valve rod 2 that is fixedly connected with sealing head 1, described valve rod 2 is provided with and cuts round platform rank 3, cutting round platform rank 3 is to clip a part at step cutting pattern, forms a cross-section 4, and cross-section 4 radially can not rotate choke plug, cut the area on round platform rank 3 greater than the basal area of sealing head 1, cut the below that round platform rank 3 are close to sealing head 1.Described sealing head 1 is made as the cambered surface deflector, can reduce circulating resistance.

Claims (2)

1. choke plug, comprise sealing head and the valve rod that is fixedly connected with sealing head, it is characterized in that: described valve rod is provided with and cuts the round platform rank, cutting the round platform rank is to clip a part at step cutting pattern, form a cross-section, cut the area on round platform rank greater than the basal area of sealing head, cut the below that the round platform rank are close to sealing head.

2. a kind of choke plug according to claim 1, it is characterized in that: described sealing head is made as the cambered surface deflector.

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