Special casting structure of valve element

Abstract

The special casting structure of the valve element comprises a valve element piece, a straight flow channel, a drainage channel and a main sprue part, the valve element piece and the drainage channel are symmetrically distributed on the two sides of the straight flow channel, the main sprue part is arranged over the straight flow channel, the valve element piece comprises an inner core part, an outer ring part and a connecting part, the inner core part and the outer ring part are coaxially distributed, and the connecting part is arranged between the inner core part and the outer ring part. And the main sprue part is connected with the inner core part and the outer ring part through a straight runner and a drainage runner respectively. The utility model mainly aims to change the casting structure of the valve core, so that the shrinkage porosity area is transferred into the straight runner from the original interior of the valve core, the straight runner, the drainage runner and other pouring gate parts are subsequently cut off, the whole part of the valve core piece is not influenced by the shrinkage porosity area, the internal structure of the valve core piece is more compact, and the service life of the valve core piece is prolonged. And the production qualification rate of the valve core piece is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of casting, in particular to a special casting structure of valve core. BACKGROUND

[0002] The valve core is an important control component in the valve, and the stability of its physical structure directly affects the service life and safety of the valve, the valve core is provided with an inner core part and an outer ring part which are coaxially distributed, the inner core part is used for being connected with a valve rod, and the outer ring part is used for being connected with a valve seat in a sliding mode.

[0003] The casting structure of the traditional valve core adds a pouring riser on the inner core part, and forms a flow guide channel connected with the outer ring part on both sides of the pouring riser, in the cooling process of the valve core through the mold casting, the inner core part will form a thermal knot due to overheating, resulting in a loose area in the inner core part, after the inner core part is punched and threaded, the internal defects can be seen from the threaded hole, which seriously affects the strength of the threaded connection between the valve core and the valve rod, and increases the unqualified rate of the valve core, and wastes manpower and material resources, therefore, how to optimize the casting structure of the valve core is the key to improving the product quality. SUMMARY

[0004] In order to overcome the defects in the background art, the utility model adopts the technical scheme of a special casting structure of valve core, which comprises a valve core part, a straight channel, a flow guide channel and a main pouring part, the valve core part and the flow guide channel are symmetrically distributed on both sides of the straight channel, the main pouring part is arranged vertically above the straight channel, the valve core part comprises an inner core part and an outer ring part which are coaxially distributed, and a connecting part arranged between the inner core part and the outer ring part, and the main pouring part is connected with the inner core part and the outer ring part through the straight channel and the flow guide channel respectively.

[0005] By changing the casting structure of the valve core, the loose area is transferred from the original internal part of the valve core to the straight channel, and the subsequent pouring part such as the straight channel and the flow guide channel will be cut off, the whole part of the valve core part is not affected by the loose area, so that the internal structure of the valve core part is more compact, and the production qualified rate of the valve core part is improved.

[0006] The utility model is further provided with a secondary pouring part between the inner core part and the straight channel, and the cross-sectional area of the main pouring part and the secondary pouring part gradually decreases towards the valve core part.

[0007] By adopting the above technical scheme, the main pouring part and the secondary pouring part are both circular truncated cone structures with gradually decreasing cross-sectional areas, when the casting liquid passes through the main pouring part and the secondary pouring part, vortex is avoided, and the flow of the casting liquid is facilitated.

[0008] The utility model is further provided with an L-shaped flow guide channel, one end of the flow guide channel is perpendicular to and connected with the straight channel, and the other end of the flow guide channel is perpendicular to and connected with the outer ring part.

[0009] The technical scheme is adopted, symmetrically distributed runner channels are added on both sides of the straight runner, each valve core piece has two runners for injection, and the filling state is better.

[0010] The utility model further provides that the inner core part and the outer ring part are provided with a connection part in circumferential distribution.

[0011] The technical scheme is adopted, the inner core part is circumferentially distributed with four groups of connection parts, the flowability between the inner core part and the outer ring part is ensured through the connection parts, the valve core piece is lightweighted as a whole, and the overall structure design is reasonable.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] By changing the casting structure of the valve core, the shrinkage area is transferred from the original inside of the valve core to the straight runner, and the runner part such as the straight runner and the runner channel will be cut subsequently, so that the overall part of the valve core piece is not affected by the shrinkage area, the internal structure of the valve core piece is more compact, and the production qualified rate of the valve core piece is improved.

[0014] The utility model embodiment will be further described below with reference to the drawings. DRAWINGS

[0015] Figure 1 It is a perspective view of the valve core casting structure of the utility model;

[0016] Figure 2 It is a structure schematic view of the shrinkage area formed by the utility model;

[0017] Figure 3 It is a perspective view of the finished valve core of the utility model;

[0018] Figure 4 It is a structure schematic view of the shrinkage area formed by the traditional casting structure of the utility model;

[0019] Wherein: 1 - valve core piece, 2 - straight runner, 3 - runner channel, 4 - main gate part, 5 - secondary gate part, 11 - inner core part, 12 - outer ring part, 13 - connection part, 14 - threaded hole; PREFERRED EMBODIMENT

[0020] As Figure 1 , 2As shown, the embodiment provides a special casting structure of valve core, which comprises valve core part 1, straight runner 2, flow runner 3 and main sprue 4, the valve core part 1 and the flow runner 3 are symmetrically distributed on both sides of the straight runner 2, and the main sprue 4 is arranged above the straight runner 2, the valve core part 1 comprises an inner core part 11 and an outer ring part 12 which are coaxially distributed, and a connecting part 13 arranged between the inner core part 11 and the outer ring part 12, and the main sprue 4 is connected with the inner core part 11 and the outer ring part 12 through the straight runner 2 and the flow runner 3 respectively.

[0021] In the embodiment, the secondary sprue 5 is arranged between the inner core part 11 and the straight runner 2, the cross-sectional area of the main sprue 4 and the secondary sprue 5 gradually decreases towards the valve core part 1, and the main sprue 4 and the secondary sprue 5 are both circular truncated cone structures with gradually decreasing cross-sectional area, so that vortex is avoided when the casting liquid passes through the main sprue 4 and the secondary sprue 5, and the flow of the casting liquid is facilitated.

[0022] In the embodiment, the flow runner 3 is in L-shaped structure, one end of the flow runner 3 is vertically connected with the straight runner 2, and the other end of the flow runner 3 is vertically connected with the outer ring part 12, and the flow runner 3 is symmetrically distributed on both sides of the straight runner 2, so that each valve core part 1 is injected by two runners, and the filling state is better.

[0023] In combination with Figure 3 As shown, in the embodiment, the connecting part 13 is circumferentially arranged between the inner core part 11 and the outer ring part 12, and the inner core part 11 is circumferentially provided with four groups of connecting parts 13, the flowability between the inner core part 11 and the outer ring part 12 is ensured through the connecting part 13, the valve core part 1 is lightened as a whole, and the overall structure design is reasonable.

[0024] In combination with Figure 2 , 3 , 4, the working principle of the utility model is that the casting liquid enters from the main sprue 4, flows into the valve core part 1 through the straight runner 2 and the flow runner 3 on both sides of the straight runner 2, and when the casting is completed and cooled, the straight runner 2 at the secondary sprue 5 forms a loose area due to overheating, and since only part of the valve core part 1 is taken in subsequent cutting, polishing and other processes, the threaded hole 14 for connecting the valve rod is processed in the inner core part 11 of the valve core part 1, and the problem that the valve core part 1 is affected by the loose is well solved.

[0025] The above are preferred embodiments of the application, which do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A special casting structure of a valve core, characterized by, The valve core (1), the straight channel (2), the flow channel (3) and the main gate (4) are included, the valve core (1) and the flow channel (3) are symmetrically distributed on both sides of the straight channel (2), and the main gate (4) is arranged above the straight channel (2), the valve core (1) includes the inner core (11) and the outer ring (12) which are coaxially distributed, and the connecting part (13) is arranged between the inner core (11) and the outer ring (12), and the main gate (4) is connected with the inner core (11) and the outer ring (12) through the straight channel (2) and the flow channel (3) respectively.

2. The special casting structure of a valve core according to claim 1, characterized in that: The secondary gate (5) is arranged between the inner core (11) and the straight channel (2), and the cross-sectional area of the main gate (4) and the secondary gate (5) gradually decreases towards the valve core (1).

3. The special casting structure of a valve core according to claim 1, characterized in that: The flow channel (3) is in L-shaped structure, one end of the flow channel (3) is perpendicular to and connected with the straight channel (2), and the other end is perpendicular to and connected with the outer ring (12).

4. The special casting structure of a valve core according to claim 1, characterized in that: The connecting part (13) is arranged between the inner core (11) and the outer ring (12) in circumferential distribution.

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