CN101033810B

CN101033810B - Check valve

Info

Publication number: CN101033810B
Application number: CN2007100857240A
Authority: CN
Inventors: 国行晋平; 熊谷尚彦
Original assignee: KUMAGAI IRON WORKS
Current assignee: KUMAGAI IRON WORKS
Priority date: 2006-03-08
Filing date: 2007-03-08
Publication date: 2010-05-26
Anticipated expiration: 2027-03-08
Also published as: JP2007239861A; JP4639159B2; CN101033810A

Abstract

Provided is a check valve which is convenient in mount for switch and position adjustment. A check valve is a swing check valve which has a no water connecting device for detecting whether the water is supplied by the action of a pump, wherein, the no water connecting device has a cam (20) fixed on a valve rod (5) extending outside of a valve body (2); a switch (21) for detecting the open of a valve core (3) based on the motion of the cam (20); and a mounting box (25) for mounting the switch (21). The switch (21) is disposed with mounting bolts (23), (24) at diagonal position of a rectangle mounting surface, on the mounting box (25), one side and another side of a fixed plate (27) formed on another side incline relative to one side are formed with movable bolt grooves (29a), (29b) extending toward to the cam direction and parallel for mounting the bolts (23), (24), the length (L) of the bolt groove from one side to another side is set shorter than the length (L2) between diagonal bolts.

Description

Safety check

Technical field

The present invention relates to Swing check valve, have detection and have or not the action that utilizes pump to send the nothing of water to send the water contact arrangement.

Background technique

The safety check of above-mentioned form can not visual open and-shut mode to spool.Even if pump meeting sintering when paying no attention to is placed in pump meeting no load running under conveying pump is worked the situation of also not sending water not knowing this situation.And safety check will be opened when pump work is sent water, send the water contact arrangement so the nothing that possesses the switch (スイ Star チ) that detects the spool unlatching is set on this safety check, and with the no load running of testing pump, foregoing is known already.

This nothing is sent in the water contact arrangement, stationary cam on the valve rod outside extending to valve body, and by opening cam rotate with spool with switch connection, and the unlatching of detection spool.At this moment, by the cam of rotation mode, send the water contact arrangement to be assembled on the valve nothing when being set angle with switch connection with the opening angle of spool.At this moment, require to allow switch move really when spool is opened to a certain angle (for example 15 degree), the valve of assembling for switch connection, disconnection, and needs to adjust separately one by one and confirm under the aperture of action.

The safety check of prior art, be described in Japan's model utility bulletin 46-33516 communique and the 53-42807 communique, as described in it, in order not only to prevent adverse current but also to prevent water hammer and want the scram safety check, for this reason, valve rod is extended to foreign side,, spring platform or casing are set and spring is installed at the extending portion of valve rod in the outside of valve body.And in the band cover casing as protection mechanism when above-mentioned switch is accommodated in outdoor use, but the size of the length of this casing self all requires to reduce.

But, be accompanied by casing the height miniaturization requirement and when narrowing down at the interval to valve body, the terminal operation of switch fixed bolt is very loaded down with trivial details.Furthermore has following problem, while adjust the operation that the position of switch is mounted for difficulty this moment.

Summary of the invention

The objective of the invention is, there is something special that installation that a kind of safety check, this safety check be easy to carry out switch and its position adjustment are provided in view of above-mentioned.

To achieve these goals, the present invention proposes following safety check, is to have to detect to have or not the action that utilizes pump to send the nothing of water to send the Swing check valve of water contact arrangement, it is characterized in that, above-mentioned nothing send the water contact arrangement to have: cam is fixed on the valve rod that extends to outside the valve body; Switch is according to the unlatching of the motion detection spool of this cam; Casing is installed, this switch is installed, above-mentioned switch is provided with mounting screw in the diagonal positions of the attachment face that forms rectangle substantially, on above-mentioned installation casing, with respect on one side and this one side of the mounting plate that another side is formed slopely and another side are formed with towards the parallel and above-mentioned mounting screw of the direction extension of above-mentioned cam screw slots movably, arrive the length of the screw slots inlet of another side on one side, compare with the length between cornerwise screw and set shortly.

In addition, among the present invention, above-mentioned casing is by above-mentioned assembly with the cover of its coating and form 6 bodies, above-mentioned assembly has 2 faces, be mounting plate and riser that an ora terminalis of this mounting plate is erected, above-mentioned cover has 4 faces, promptly above, from the top bi-side that are connected with both sides and with the opposed side of above-mentioned riser, bi-side form along above-mentioned riser above this cover, and, in the bi-side of cover, be formed with the curved part of fastening at lower edge, thereby effect is obvious at the lateral margin of mounting plate.

According to formation of the present invention, even the working space of assembly department is narrow, also can be easy to carry out the position adjustment of switch, and adjusted fixing can be carried out easily also.

Description of drawings

Fig. 1 is the longitudinal sectional view of safety check of the present invention.

Fig. 2 is the transverse sectional view of safety check of the present invention.

Fig. 3 is the front elevation of the spring assembly portion of expression safety check of the present invention.

Fig. 4 is the explanatory drawing that the nothing that is used for safety check of the present invention is sent the switch of water contact arrangement.

Fig. 5 does not have the front explanatory drawing that send the water contact arrangement.

Fig. 6 is the explanatory drawing that casing is installed.

Fig. 7 is the exploded perspective view that casing is installed.

Description of reference numerals:

1 safety check

2 valve bodies

3 spools

4 valve seats

5 valve rods

20 cams

21 switches

23,24 mounting screws

25 install casing

26 baseplate parts

27 fixed plates

28 risers

29a, 29b screw slots

30 cover portions

Embodiment

Below, according to the description of drawings embodiments of the present invention.

Fig. 1 is the cross-sectional illustration figure of safety check of the present invention.

Among Fig. 1, reference character 1 is a safety check, the 2nd, the valve body of safety check, the 3rd, spool.As shown in Figures 1 to 3, on spool 3, the spool arm (not shown) that is formed on the spool 3 is fixed in valve rod 5.Valve rod 5 is installed on valve body 2 rotationally and at axle direction movably by bearing sleeve 6.Foreign side owing to connect valve body 2 towards it is outstanding, so the sealing mechanism that possesses O shape ring etc. is set on this valve rod 5, constitutes and prevents that press water from leaking.

Spring lever arm 10 by lock screw 11,12 be fixed on valve rod 5 expose part outside valve body 2, be the outside of sealing mechanism, be attached with

13,14 at the two ends of this spring lever arm 10.In addition, as shown in Figure 3, valve body 2 is provided with the spring platform 15 that forms rhombus substantially, and spring platform 15 is by not shown being bolted on the valve body 2.On this spring platform 15, as the

spring

16,17 of elastic force-applying mechanism, with the two ends that are separately positioned on spring platform 15 near

18,19 and the

13,14 of above-mentioned spring lever arm 11 mutually the mode of fastening be mounted.Be that spring 16 is installed mutually with the pin 18 of spring platform 15 and the pin 13 of spring lever arm 11 with setting up, spring 17 is installed mutually with the pin 19 of spring platform 15 and the pin 14 of spring lever arm 10 with setting up.In addition,

spring

16,17 and each

13,14,18,19 are through the bearing fastening.

2

springs

16,17 are extension spring, and both assist so that the mode effect that spring lever arm 10 rotates along the clockwise direction of Fig. 3.Thereby by valve rod 5 is applied clockwise running torque, this spring force generation effect passes to spool 3 through valve rod 5 and spool arm, makes the valve seat 4 of 3 times seats of spool to it.

Be well known that in the safety check of this formation following nothing send the water contact arrangement, when spool is opened set angle through cam and switch switches, thereby detect the unlatching of spool, still, illustrated before this that this device had the problem that is difficult to adjust the switching position.

For this reason, as shown in Figure 4, the nothing of present embodiment is sent the water contact arrangement, use be subjected to hinge bar 22 pushing and switch, in this example as the switch 21 of the sensitive switch of connecting, the attachment face of this switch 21 forms rectangle substantially, is provided with

mounting screw

23,24 in its diagonal positions of attachment face 22.This switch 21 is installed on the installation casing 25 that is arranged at spring platform 15 as shown in Figure 5.

In addition, above-mentioned valve rod 5 leads to the installation casing 25 that switch 21 has been installed as shown in Figure 2, as shown in Figure 5, the cam of switch 21 being connected by rotation 20, being fixed on the position by screw etc. is on the valve rod 5 corresponding with the mounting point of this switch 21.

As Fig. 2 and shown in Figure 7, casing 25 is installed by forming 6 bodies as the baseplate part 26 of the assembly that switch 21 is installed and the cover portion 30 of cover and protective switch 21.Baseplate part 26 has the fixed plate 27 of floatless switch 21 and one edge-on riser 28.And cover 30 have top 31, from top 31 continuously to the

bi-side

32,33 of both sides and with 4 faces of riser 28 opposed sides 34.

On the fixed plate 27 of baseplate part 26, on its one side 27a and another side 27b, be formed with extend towards the direction of cam 20 parallel and mounting

screw

23,24 movably screw slots 29a, 29b.

Nut (not shown) more shallowly with the state of

mounting screw

23,24 threaded joint of switch 21 under, be sticked among screw slots 29a, the 29b of fixed plate 27 temporarily, install on the casing 25 thereby switch 21 is installed in.At this moment, screw slots 29a is formed on one side 27a of fixed plate 27, screw slots 29b is formed on the another side 27b of fixed plate 27, but, in order to make above-mentioned temporary card synthesize possibility, length L 1 from one side 27a of screw slots 29a, 29b to another side 27b is compared with the length L 2 of 23,24 on cornerwise screw in the switch 21, is set shortly.By this setting, even make the state of

screw

23,24 threaded joint of nut (not shown) and switch 21, also can make this

screw

23,24 stride across fixed plate 27, screw 23 is engaged with screw slots 29a, screw 24 is engaged with screw slots 29b.Promptly because one side 27a of fixed plate 27 to the length L 1 of another side 27b, the weak point of comparing with the length L 2 of 23,24 on cornerwise screw in the switch 21, even so the state of nut and

screw

23,24 threaded joint also can be fastened on switch 21 on the fixed plate 27 from the arrow A direction of Fig. 5 with relaxing.

Switches 21 temporarily that engage with fixed plate 27, can with respect to cam 20 near or the direction of separating on move, so carry out making the position adjustment of switch 21 actions easily by cam 20, in case this position is definite, the nut of fastening

screw trip bolt

23,24 and being fixed then.

So like this, the nothing of present embodiment is sent the water contact arrangement, the

screw

23,24 that engages with nut thread in advance can be fastened among screw slots 29a, the 29b of fixed plate 27, thereby the switch 21 of end position adjustment, as long as have being carried out fastening working space, casing 25 miniaturizations be installed thereby make by the nut that is separated with pad of threaded joint.

The adjustment of the end switch 21 and nothing that is fixed is sent the water contact arrangement will be installed above-mentioned cover portion 30 with protective switch 21.In order to be easy to install this cover portion 30, as shown in Figure 7, be formed with curved part 32a, the 33a of fastening in the lateral margin of baseplate part 26 in the

bi-side

32,33 of cover portion 30.Thereby, when being installed in cover portion 30 on the baseplate part 26, curved part 32a, the 33a of cover portion 30, can be moving sliding in state of the lateral margin of baseplate part 26 in fastening, the part of

bi-side

32,33,31 is chimeric with the upper limb of riser 28 above cover portion 30, thereby cover portion 30 is temporary fixed.After this, with screw etc. cover portion is fixed on the baseplate part 26, the assembling that casing 25 then is installed finishes.

Claims

1. a safety check is to have to detect to have or not the action that utilizes pump to send the nothing of water to send the Swing check valve of water contact arrangement, it is characterized in that,

In above-mentioned nothing is sent the casing of water contact arrangement, have the cam that is fixed on the valve rod that extends to outside the valve body, according to the switch of the unlatching of the motion detection spool of this cam, the assembly of this switch is installed,

Above-mentioned switch is provided with mounting screw in the diagonal positions of the attachment face that forms rectangle substantially,

On above-mentioned assembly, be provided with respect on one side and the mounting plate that another side is formed slopely,

Place, this both sides of one side of this mounting plate and another side is formed with at the parallel and above-mentioned mounting screw that extends towards the direction of above-mentioned cam screw slots movably,

In the above-mentioned mounting plate, be formed with one side of these screw slots and compare with the cornerwise length (L2) between screw slots to the length (L1) of another side and set shortly.

2. safety check as claimed in claim 1, it is characterized in that, above-mentioned casing is by above-mentioned assembly with the cover of its coating and form 6 bodies, above-mentioned assembly has 2 faces, be mounting plate and riser that an ora terminalis of this mounting plate is erected, above-mentioned cover has 4 faces, promptly, from top continuously to the bi-side of both sides and with the opposed side of above-mentioned riser, bi-side form along above-mentioned riser above this cover, and, bi-side at cover are formed with the curved part of fastening at the lateral margin of mounting plate at lower edge.