CN2839772Y

CN2839772Y - Safety valve with handle elastic recovery

Info

Publication number: CN2839772Y
Application number: CNU2005201052512U
Authority: CN
Inventors: 马科·卡利菲
Original assignee: Caleffi SpA
Current assignee: Caleffi LLC; Mark Holdings Ltd.; Caleffi SpA
Priority date: 2004-10-18
Filing date: 2005-09-08
Publication date: 2006-11-22
Anticipated expiration: 2015-09-08
Also published as: NL1029778C1; FR2876762A3; FR2876762B3; ITMI20040467U1; ES1061038Y; ES1061038U

Abstract

A safety valve comprises a valve body, a valve, an elastic piece, a manual operating type cam component (24), wherein the valve body is provided with an inlet joint and an outlet joint, and is communicated with a valve chamber; the elastic piece is used for keeping the valve closed on a valve seat which is provided corresponding to the outlet joint with the same axis; the manual operating type cam component is used for recovering the elasticity of the valve to the initial position by the rotation of an operating handle (23). The operating handle is provided with a median rotary rod which is combined with a valve supporting and pushing piece and is matched with an elastic resetting piece (27), wherein a handle of the elastic resetting piece corresponds to the valve supporting piece; the elastic resetting piece comprises a primary and a secondary elastic arms (27), and is connected with the operating handle, making contackt slide on a fixed convex shoulder which is provided corresponding to the rotary rod of the operating handle with the same axis.

Description

The safety valve of handle elastic return

Technical field

[01] the present invention relates to the safety valve of Joystick elastic return, relate in particular to and have the fixing safety valve of demarcating calibration, it is generally used for heating system, for example little fireplace, when pressure surpasses safety valve demarcation calibration predetermined value, reduce pressure, can be applicable to heating system, make provision against emergencies.

Background technique

[02] this safety valve adopts membrane valve, and it by a spring of suitably calibrating, according to the working pressure of fireplace or heating system, promotes and remain on closed condition usually.

[03] in this safety valve, necessary manual operating valve is opened with emptying equipment.This operation is used for a Joystick and carries out by applying, and Joystick is furnished with a suitable cam, can with a respective members effect so that the angle of handle rotation causing valve retreats simultaneously and opens.

[04] this safety valve is described in EP-A-0549397 and WO-A-01/42696.

[05] in this two case, Joystick is furnished with a center rod, and it reaches a ring gear or similar component, and it can be meshed with a similar ring gear of valve-supporting spare.

When [06] assembling, the driving handle bar makes it to mesh by ratchet with valve-supporting spare, and valve must be bearing on the valve seat, can cause local deformation.Because safety valve must accurately be calibrated with accurate numerical value, so valve may distortion can have other defect.

[07] particularly, in view of in the difference aspect valve elastic return and the machining tolerance, in most of case, the bar of Joystick engages with valve-supporting spare is lax with certain clearance; Therefore, in normal work period, the vibration that fireplace produces is transferred to safety valve, causes the Joystick vibration, sends unpleasant to hear noise.

[08] for remedying this defective, FR-A-9 704 121 proposes to use a kind of multijaw (toiled ' araign é e) elastic device, puts therebetween between a convex shoulder and diapire of handle, thereby eliminates the gap that may exist between the engaging tooth.

[09] be to simplify the structure of this safety valve to greatest extent in view of present tendency, to reduce cost, therefore, use an elastic component, put between valve body or with it and to fuse partly, Joystick is regarded as the comparison costliness, can increase big expense, and make assembling complicated.

[10] therefore, must seek more simple and another solution cheaply.

Summary of the invention

[11] the present invention mainly is intended to propose a kind of new different solutions that meet aforementioned needs.

[12] because will be along a predetermined direction handle with sleeve, manually opened safety valve, so handle also must be furnished with suitable mark, the sense of rotation of indicating correct.

[13] the present invention also is intended to propose a solution, by means of this, can be handle configurations elastic reset spare very simple and economically, and itself and handle are integral, and the sign directly perceived of handle sense of rotation can be provided simultaneously, so that open safety valve.

[14] the present invention proposes a kind of safety valve, and it comprises:

[15] one valve bodies, it has an inlet attack and an outlet connection, is connected with a valve box;

[16] one valve and elastic components, its be used for valve sealing remain on a valve seat with respect to the outlet connection coaxial arrangement;

[17] manually-operable formula cam part is used for making valve elastic return enable possition by rotating a Joystick;

[18] wherein, Joystick has a meta (m é diane) swingle, and it engages with valve supporting driving member; And

[19] wherein, be furnished with the elastic reset spare of handle with respect to the valve supporting member,

It is characterized in that [20] described elastic reset spare comprises one first and one second elastic arm, it is connected with Joystick, fixedly contacts slip on the convex shoulder one, and fixedly convex shoulder is with respect to the swingle coaxial arrangement of Joystick.

Description of drawings

[21] with reference to accompanying drawing and non-limiting example, the present invention will better be understood.Accompanying drawing is as follows:

[22] Fig. 1 is the longitudinal sectional drawing that handle is in the safety valve of its common position;

[23] Fig. 2 is the sectional drawing of the safety valve of figure before being similar to, and the handle that illustrates is in the assembling and the zygophase of valve supporting member;

[24] Fig. 3 only is the stereogram on Fig. 1 top, and a part of handle is removed so that the elastic return arm is shown, arrow indication sense of rotation.

Embodiment

[25] as shown in Figure 1, safety valve comprises a valve body 10, and it has a fluid inlet attack 11 and an outlet connection 12, and open its valve box 13 towards a membrane valve 14, and membrane valve 14 is used to be pushed and is enclosed in a valve seat 15.

[26] valve 14 is supported by a supporting member 16, and supporting member 16 for example is made of a sleeve pipe, and its effect is supporting one spring 17, and spring 17, makes it to be enclosed on the valve seat 15 so that promote valve 14 with the incoming pressure value less than a predetermined value through suitably calibration.

[27] peripheral edge of membrane valve 14, by a closing cap 18, sealing is clamped between the relative convex shoulder surface of valve body 10.

[28] carrying sleeve 16 of valve 14 and thrust spring 17 has a tubular wand 19, and it is along a cylindrical guiding element 18 ' endwisely slip; Bar 19 ends at an internal gear 20, and internal gear 20 ring gear 21 that the end of a center rod 22 forms that is used to coexist carries out the ratchet engagement, and center rod 22 is stretched out from a Joystick 23, passes to cover a central guide hole of 18.

[29] handle 23 has a circular cam 24, and it during rotation contacts with a convex portion 25 from an annular convex shoulder 26 radial protrusions shown in Figure 3; Cam 24 retreats sleeve pipe 16 and valve 14 during handle 23 rotations, and inlet attack 11 is communicated with by valve box 13 with outlet connection 12.

[30] handle 23 also is furnished with elastic reset spare, in the contact that keeps under the nominal situation of safety valve between the

ring gear

20 and 21, thereby avoid causing vibration and noise, handle 23 also has the arrow mark, the hand rotation direction of indication handle is so that operated valve 14 makes it to open.

[31] particularly, as shown in Figure 3, the elastic reset spare of handle 23 comprises two elastic arms 27 (one only is shown among the figure), and its diapire 28 from handle stretches out, and ends at a round flange 29, and round flange 29 is used for contacting slip with annular convex shoulder 26.

[32] like this, handle is equipped with an elastic return part, pushes away before can making it, and center rod 22 is engaged with the tubular wand 19 of valve 14 carrying sleeves, as shown in Figure 2, then, by means of the elastic return of elastic arm 27, eliminates the gap between the ring gear, as shown in Figure 1.

[33] handle 23 also is furnished with the sense of rotation cue mark.The diapire 28 of handle is configured as corresponding to the formation district of each elastic arm 27 or mold pressing district, has an arrow-shaped curve bath 30, and it ends at and the corresponding arrow of the immovable point of elastic arm 27 tip.

[34] this solution is favourable, because not only simply but also economical, can utilize arrow-shaped grooving 30, obtains elastic arm by a plastic stempressing operation.

[35] therefore, according to the above and situation shown in the drawings, can make a kind of like this safety valve by not only simply but also low cost solution, its plastic handle is furnished with suitable elastic reset spare and sense of rotation cue mark.

Claims

1. safety valve, it comprises:

One valve body (10), it has an inlet attack (11) and an outlet connection (12), is connected with a valve box (13);

One valve (14) and elastic member, described elastic member are used to keep described valve sealing ground against the valve seat with respect to described outlet connection coaxial arrangement;

Manually-operable formula cam part (24) is used for making described valve return to opening state by rotating a Joystick (23);

Wherein, described Joystick has a meta swingle, and it engages with valve supporting driving member; And

Wherein, be furnished with the elastic reset spare (27) of described handle with respect to described valve supporting member,

It is characterized in that described elastic reset spare comprises one first and one second elastic arm (27), it is connected with described Joystick, abuts against one and fixedly is slip contiguously on the convex shoulder, and described fixedly convex shoulder is with respect to the swingle coaxial arrangement of described Joystick.

2. safety valve according to claim 1 is characterized in that, the plastics Joystick of described mold pressing has the cue mark (30) of its sense of rotation of indication.

3. safety valve according to claim 2 is characterized in that, described cue mark is made of the arrow-shaped curve bath that forms on described Joystick diapire.

4. safety valve according to claim 3 is characterized in that described curve bath is arranged corresponding to the elastic return arm.

5. safety valve according to claim 1 is characterized in that, described elastic return arm ends at the contacted round flange of described annular convex shoulder (29).