Four-way switching valve and method for welding fixing screws of four-way switching valve

A four-way switching valve and welding method technology, which is applied to multi-way valves, welding equipment, valve devices, etc., can solve the problems of troublesome assembly operations, increased costs, and increased number of parts, achieving easy assembly operations, easy welding operations, and The effect of preventing loosening

Inactive Publication Date: 2015-02-11
SAGINOMIYA SEISAKUSHO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the durability of the piston device, it is necessary to prevent the rotation of such bolts, but if riveted plates and plate parts are used, there are problems that the number of parts increases, the assembly work is troublesome, and the cost increases

Method used

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  • Four-way switching valve and method for welding fixing screws of four-way switching valve
  • Four-way switching valve and method for welding fixing screws of four-way switching valve
  • Four-way switching valve and method for welding fixing screws of four-way switching valve

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Embodiment Construction

[0024] Next, embodiments of the present invention will be described. figure 1 It is a partially cutaway side view of the four-way switching valve of the embodiment. The four-way switching valve of this embodiment includes: a valve case 10 constituting a cylindrical main valve chamber A, first and second sub-valve chambers B1, B2; a piston valve 20 accommodated in the valve case 10; Valve seat 30 in valve housing 10 . The piston valve 20 is composed of a first piston 1 , a second piston 2 , a stainless steel connection fitting 3 , and a bowl-shaped valve body 4 . The first and second pistons 1 and 2 are respectively attached to both ends of the joint fitting 3 , and the valve body 4 is fitted into a fitting hole 3 a in the center of the joint fitting 3 to be held by the joint fitting 3 .

[0025] The first and second pistons 1, 2 divide the inside of the valve casing 10 into a main valve chamber A in the center and two sub-valve chambers B1, B2 on both sides thereof. The fou...

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Abstract

A four-way switching valve accommodates a piston valve in a valve casing. The piston valve is formed by first and second pistons (1, 2), a connecting fitting and a valve body (4). The piston (1) is formed by a pad (11), a guide plate (12), a tooth spring (13) and a reinforcing plate (14). The piston (2) is formed by a pad (21), a guide plate (22), a tooth spring (23) and a reinforcing plate (24). The piston (1) is fixed to a vertical plate (31) of the connecting fitting via fixing screws (N1, N2). The piston (2) is fixed to a vertical plate (32) of the connecting fitting via fixing screws (N3, N4). Fusing layers (P1, P2) generated by resistance welding are formed at a position where the fixing screw (N1) is abutted with the guide plate (12) and a position where the fixing screw (N2) is abutted with the guide plate (12). Fusing layers (P3, P4) generated by resistance welding are formed at a position where the fixing screw (N3) is abutted with the guide plate (22) and a position where the fixing screw (N4) is abutted with the guide plate (22).

Description

technical field [0001] The present invention relates to a four-way switching valve having a piston valve having pistons at both ends of a connecting fitting holding a bowl-shaped valve body, and a valve case housing the piston valve, and the piston valve is moved by fluid pressure. Switching the flow path relates in detail to the structure of the piston valve and the welding method of its fixing screws. Background technique [0002] Conventionally, as a piston valve of such a four-way switching valve, there is, for example, a piston device disclosed in JP 2009-144880 A (Patent Document 1). In this patent document 1, in the conventional piston device, the auxiliary spring and the spacer are clamped by the clamping plate, and the plate member is abutted against and fixed by riveting, thereby assembling the single piston. Then, two of the piston units are respectively fastened to the ends of the connecting plate (connecting fitting) by bolts (fixing screws). In addition, as a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/06B23K11/00
CPCB23K11/00F16K11/0655
Inventor 村田雅弘木村宏光
Owner SAGINOMIYA SEISAKUSHO INC
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