CN200999912Y

CN200999912Y - Signal valve

Info

Publication number: CN200999912Y
Application number: CNU2007200661673U
Authority: CN
Inventors: 金宗林; 赵志城
Original assignee: JINGJIA VALVE GROUP CO Ltd
Current assignee: JINGJIA VALVE GROUP CO Ltd
Priority date: 2007-01-09
Filing date: 2007-01-09
Publication date: 2008-01-02
Anticipated expiration: 2017-01-09

Abstract

The utility model relates to a signal valve. The utility model comprises a valve body, a valve plate, a valve rod nut, a valve rod, a middle opening gasket, a valve cover, a thrust bearing, a pressing cover, and an indicating nut, the valve rod is vertically arranged at the center of the valve body through the valve rod nut, the valve plate is arranged at the lower part of the valve rod, the valve cover is connected with the upper end of the valve body through the middle opening gasket, and the pressing cover is connected with the upper end of the valve cover through the thrust bearing. The utility model is characterized in that the upper cover of the pressing cover is arranged with a travel switch through the indicating nut 10. The utility model has the advantages that the production cost is low, the on-site installation and maintenance are convenient, the principle is simple, and the utility model is advantageous for the on-site operation during the project.

Description

A kind of signal valve

Technical field

The utility model relates to a kind of signal valve, relates in particular to a kind of the keying state to be become the valve of electrical signal transfer to remote control room, belongs to valve technology field.

Background technique

Present inside screw non-rising stem type gate valve has the indicating device that exposes, but can't know its keying state intuitively in remote control room.

Summary of the invention

The purpose of this utility model is that invention is a kind of does not need remote operation control, but need know the signal valve of valve opening and closing state.

For realizing above purpose, the technical solution of the utility model provides a kind of signal valve, comprise valve body, valve plate, Stem Mut, valve rod, middle mouth pad, valve gap, thrust bearing, gland, indication nut, valve rod is vertical at the center of valve body by Stem Mut, valve plate is located at outside the bottom of valve rod, and valve gap is connected with the upper end of valve body by middle mouthful of pad, and gland is connected with the upper end of valve gap by thrust bearing, it is characterized in that, be provided with position limit switch by the indication nut in the upper end of gland.

Described position limit switch is a double-contact formula position limit switch.

The utility model adopts and adds a position limit switch in indicating device inside, guides to the control room by electric wire, and the stroke indicating device is after improving, except that housing, each inner widget does not expose beautiful shape, position limit switch places in the enclosing housing, and anti-sealing spatters, and prolongs its working life.

The selected position limit switch of the utility model is the double-contact formula, and one of them is a normally opened contact, and another is a normally-closed contact, the line that normally-closed contact connect is received on the long-range red led, and normally opened contact is received on the green indicating lamp, like this, when valve was in closed condition, red led was bright.After valve opening put in place, pointer was pressed onto the end with the compressing tablet of position limit switch, and normally-closed contact is thrown off, and normally opened contact is connected, and at this moment green light is bright, and indicating status is a valve opening state.

The utility model mechanically, utilize the linear relationship of pitch difference and stroke, pass through mathematical computations, draw the required stroke distances of pointer, take this as a foundation, determine the position of position limit switch, on the electrical apparatus element, utilize the position limit switch of a simple diverter switch type principle, can reach designing requirement.

The utility model has the advantages that:

1, low cost of manufacture is only utilized the simple position limit switch of ten yuan of left and right sides RMB, can reach requirement of engineering;

2, on-site installation and maintenance are convenient, and principle is simple, is convenient to execute-in-place in the engineering;

3, because manufacturing cost is low, engineering cost is decreased, also need not electric drive simultaneously, saved the energy.

Description of drawings

Fig. 1 is a kind of sentinel valve door schematic representation.

Embodiment

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

Embodiment

As shown in Figure 1, be a kind of sentinel valve door schematic representation, described a kind of signal valve is by valve body 1, valve plate 2, Stem Mut 3, valve rod 4, middle mouthful of pad 5, valve gap 6, thrust bearing 7, gland 8, position limit switch 9 and indication nut 10, valve rod 4 is vertical at the center of valve body 1 by Stem Mut 3, valve plate 2 is located at outside the bottom of valve rod 4, valve gap 6 is connected with the upper end of valve body 1 by middle mouthful of pad 5, and gland 8 passes through thrust bearing 7 and is connected with the upper end of valve gap 6.

Upper end at gland 8 is provided with position limit switch 9 by indication nut 10, and described position limit switch 9 is a double-contact formula position limit switch.

The specification of fixed hole and the bulk of shell on the position limit switch 9 of returning according to buying; the settle the standard specification and the length of part bolt such as thickness; select supporting nut 10 simultaneously for use; on demand position on housing; bore two small through hole; in order to fixed journey system switch 9 usefulness; on housing, process a fairlead; electric wire is from wherein being incorporated in the housing; to be added with the soft lining that guard wire does not lose on the hole; introduce electric wire earlier, it is received on the wiring angle of position limit switch, then on demand; two fixing bolts are through earlier on the attachment hole of position limit switch; put into housing, bolt is passed housing, be fixed at housing external application nut; on-the-spot determine good line style after, the line of reserving with engineering is received respectively and is got final product.

In use, when valve was in closed condition, normally-closed contact was in running order, and by power supply, the control room red led is bright; When valve was in opening state, pointer was pressed onto the position with the compressing tablet on the position limit switch 9, and normally opened contact is connected, and normally-closed contact disconnects simultaneously, and at this moment, the green indicating lamp in control room is bright.

Claims

1. signal valve, comprise valve body (1), valve plate (2), Stem Mut (3), valve stalk (4), middle mouthful of pad (5), valve gap (6), thrust bearing (7), gland (8), indication nut (10), valve rod (4) is vertical at the center of valve body (1) by Stem Mut (3), valve plate (2) is located at outside the bottom of valve rod (4), valve gap (6) is connected with the upper end of valve body (1) by middle mouthful of pad (5), gland (8) is connected with the upper end of valve gap (6) by thrust bearing (7), it is characterized in that, be provided with position limit switch (9) by indication nut (10) in the upper end of gland (8).

2. a kind of signal valve according to claim 1 is characterized in that, described position limit switch (9) is a double-contact formula position limit switch.