CN208579015U - Valve positioner - Google Patents

Abstract

A kind of valve positioner.It is characterized by: eccentric group includes wheel disc, the first contact, the second contact, at least formed with one using shaft rotation center as the arc groove in the center of circle on wheel disc, wherein a side is formed with adjustment tooth to arc groove, and be mounted on arc groove in corresponding with the second contact of the first contact is meshed with adjustment tooth；Pilot valve is mounted in box body, and electromagnetism valve assembly is mounted on the lateral wall of box body, and pilot valve is connected with electromagnetism valve assembly；Each group connecting terminal is connected with the first contact-making switch, the second contact-making switch, pilot valve respectively.It the advantage is that setting pilot valve assists control electromagnetism valve assembly, in pilot valve setting and box body, electromagnetism valve assembly is arranged in box body lateral wall, so that it is simple and compact for structure, reduce volume, is easily installed, simultaneously according to valve opening, first contact and the second contact can circumferentially act adjustment by the adjustment tooth on arc groove, be not only simple in structure, and easy to adjust accurate.

Description

Valve positioner

Technical field

The utility model relates to a kind of switching devices, are specifically related to a kind of valve positioner.

Background technique

Valve positioner is the product used with valve matched, to the movement of control valve actuator, thus realization pair The automatic control of valve opening or closing.

Valve positioner generally includes control section and feedback fraction, and control section is for directly controlling valve actuator Movement opens or closes valve, and feedback fraction is used for the feedback of valve opening and closing position, when valve turns off or in place When, it is fed back in time, and stop actuator movement.

But currently, control section with feedback fraction is usually all seperated is independently arranged, structure is complicated, bulky, Installation is inconvenient, meanwhile, existing feedback fraction mostly uses cam and contact-making switch to cooperate, and not only structure is complicated, but also can not root It requires precisely to be adjusted according to valve opening.

Utility model content

In order to overcome the shortcomings of background technique, the utility model provides a kind of valve positioner.

Technical solution adopted by the utility model: a kind of valve positioner, including box body, shaft, eccentric group, first Contact-making switch, the second contact-making switch, pilot valve, electromagnetism valve assembly, multiple groups connecting terminal；The shaft is rotatably installed in box Body center, and box body bottom is extended in shaft lower end；The eccentric group includes wheel disc, the first contact, the second contact, the wheel Disk is fixedly mounted in shaft, and on wheel disc at least formed with one using shaft rotation center as the arc groove in the center of circle, the arc Wherein a side is formed with adjustment tooth to shape slot, and first contact is corresponding with the second contact to be mounted in arc groove, and with adjustment Tooth is meshed；First contact-making switch and the second contact-making switch are fixedly mounted on box body, and touch respectively with the first contact, second Head is mounted in box body, and the electromagnetism valve assembly is mounted on the lateral wall of box body, and the pilot valve is connected with electromagnetism valve assembly； The connecting terminal is mounted in box body, each group connecting terminal respectively with the first contact-making switch, the second contact-making switch, pilot valve phase Connection.

The box side wall is formed with through-hole, and connection pilot valve and the cable of electromagnetism valve assembly are arranged across through-hole, described Explosion-proof stopple is installed in through-hole.

The explosion-proof stopple and through-hole are connected through a screw thread cooperation.

The explosion-proof stopple is in T-shape, and O-ring seal is equipped between the explosion-proof stopple and box body.

The wheel disc is in quadrant, and the arc groove there are two different radii, first contact are set on the wheel disc It is separately mounted on two arc grooves with the second contact.

First contact uses different color marks from the second contact.

It is provided with the housing of side wall local transparent at the top of the box body, is equipped with display module, the shaft upper end in housing Extend at the top of box body, and connects display module.

The side wall of the box body corresponding wiring terminal is equipped with wiring hole, and spiral is connected with cable introducing at the wiring hole Device.

The box body includes pedestal, upper cover, and sealing ring is equipped between the pedestal, upper cover.

The beneficial effects of the utility model are: setting pilot valve assists control electromagnetism valve assembly, guide using above scheme Valve setting is in box body, and the setting of electromagnetism valve assembly is in box body lateral wall, so that simple and compact for structure, reduction volume is easily installed, Adjustment can circumferentially be acted by the adjustment tooth on arc groove according to valve opening, the first contact and the second contact simultaneously, not only Structure is simple, and easy to adjust accurate.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model embodiment valve positioner.

Fig. 2 is the structural schematic diagram of another view of the utility model embodiment valve positioner.

Specific embodiment

The utility model embodiment is described further with reference to the accompanying drawing:

As shown, a kind of valve positioner, including box body 1, shaft 2, eccentric group 3, the first contact-making switch 4, second Contact-making switch 5, pilot valve 6, electromagnetism valve assembly 7, multiple groups connecting terminal 8.

For the ease of assembling, the box body 1 generally includes pedestal 15, upper cover 16, and is fixedly connected by screw, the bottom Sealing ring 17 can also be set between seat 15, upper cover 16.

The shaft 2 is rotatably installed in 1 center of box body, and 1 bottom of box body, energy and valve are extended in 2 lower end of shaft Actuator or valve valve linkage shaft cooperation, with opening or closing for valve, shaft 2 is able to carry out corresponding rotation.

The eccentric group 3 includes wheel disc 31, the first contact 32, the second contact 33, and the wheel disc 31, which is fixedly mounted on, to be turned On axis 2, it can be rotated synchronously with shaft 2.

At least formed with using 2 rotation center of shaft as the arc groove 311 in the center of circle on the wheel disc 31, and the arc groove 311 wherein a side be formed with described in adjustment tooth 312 that first contact 32 is corresponding with the second contact 33 is mounted in arc groove 311, And be meshed with adjustment tooth 312, therefore, the first contact 32 and the second contact 33 can be along the rotations of shaft 2 by adjusting tooth 312 The heart carries out the accurate adjustment of circumferential position, and operation is very easy.

Further, the wheel disc 31 is in quadrant, and the arc groove there are two different radii is set on the wheel disc 31 311, first contact 32 and the second contact 33 are respectively corresponded and are mounted on two arc grooves 311, this makes eccentric group 3 Overall volume is smaller, and structure is more compact, and 1 inner space of box body is greatly saved, can overall volume be reduced.

Further, first contact 32 also uses different color marks from the second contact 33, convenient for distinguishing first Contact 32 and the second contact, it is ensured that correct operation is not in maloperation.

First contact-making switch 4 and the second contact-making switch 5 are fixedly mounted on box body 1, and respectively with the first contact 32, Two contacts 33 are corresponding, and when the valve is closed, the first contact 32 is contacted with the first contact-making switch 4, when valve opening is opened to specified When spending, the second contact 33 is contacted with the second contact-making switch 5.

The pilot valve 6 is mounted in box body 1, and the electromagnetism valve assembly 7 is mounted on the lateral wall of box body 1, the box body 1 Side wall corresponds to pilot valve 6 and the position of electromagnetism valve assembly 7 is provided with through-hole 101, and cable passes through through-hole 101 and connects the pilot valve 6 with electromagnetism valve assembly 7.

Further, explosion-proof stopple 9 is installed in the through-hole 101, and is connected through a screw thread cooperation, the explosion-proof stopple 9 be in T-shape, and O-ring seal 10 is equipped between the explosion-proof stopple 9 and box body 1, not only installs simple and convenient, but also is had anti- Quick-fried effect, further increases safety.

The connecting terminal 8 is mounted in box body 1, and the side wall of 1 corresponding wiring terminal 8 of box body is equipped with wiring hole 13, the connecting terminal 8 can connect external signal by wiring hole 13, while each group connecting terminal 8 is contacted with first respectively again Switch 4, the second contact-making switch 5, pilot valve 6 are connected.

Further, spiral is connected with cable entry 14 at the wiring hole 13, and patching operations are more convenient, and Safety anti-explosive.

The work step of above-mentioned valve positioner is as follows:

When valve needs to open, pilot valve 6 must be electric, and signal is transmitted the electromagnetism valve assembly, control valve again by pilot valve 6 Actuator driven valve opening, at the same drive shaft 2 rotate, when valve opening to specify aperture when, the second contact 33 just with The contact of second contact-making switch 5,6 power loss of pilot valve, electromagnetism valve assembly are closed, and valve actuator stops working；

When valve needs to close, pilot valve 6 must be electric, and signal is transmitted the electromagnetism valve assembly, control valve again by pilot valve 6 Actuator driven valve is closed, while shaft 2 being driven to invert, and when the valve is closed, the first contact 32 just contacts out with first 4 contacts, 6 power loss of pilot valve are closed, electromagnetism valve assembly is closed, and valve actuator stops working.

Above-mentioned valve positioner setting pilot valve 6 assists control electromagnetism valve assembly 7, the setting of pilot valve 6 in box body 1, electricity The setting of magnet valve assembly 7 is in 1 lateral wall of box body, so that simple and compact for structure, reduction volume is easily installed, while being opened according to valve Degree, the first contact 32 and the second contact 33 can circumferentially act adjustment by the adjustment tooth 332 on arc groove 331, not only structure Simply, and it is easy to adjust accurate.

In addition, being provided with the housing 11 of side wall local transparent at the top of the box body 1, display module 12 is equipped in housing 11, 1 top of box body is extended in 2 upper end of shaft, and connects display module 12, and unlatching or pass are correspondingly arranged on display module 12 The pattern closed makes it possible to more intuitively observe the open/close states of invention.

Embodiment is not construed as the limitation to utility model, but any spiritual improvements introduced based on the utility model, It should all be within the protection scope of the utility model.

Claims (9)

1. a kind of valve positioner, it is characterised in that: including box body (1), shaft (2), eccentric group (3), the first contact-making switch (4), the second contact-making switch (5), pilot valve (6), electromagnetism valve assembly (7), multiple groups connecting terminal (8)；

The shaft (2) is rotatably installed in box body (1) center, and box body (1) bottom is extended in shaft (2) lower end；

The eccentric group (3) includes wheel disc (31), the first contact (32), the second contact (33), the fixed peace of the wheel disc (31) On shaft (2), and on wheel disc (31) at least formed with one using shaft (2) rotation center as the arc groove (311) in the center of circle, Wherein a side is formed with adjustment tooth (312) to the arc groove (311), and first contact (32) is corresponding with the second contact (33) It is mounted in arc groove (311), and is meshed with adjustment tooth (312)；

First contact-making switch (4) and the second contact-making switch (5) are fixedly mounted on box body (1), and respectively with the first contact (32), the second contact (33) is corresponding；

The pilot valve (6) is mounted in box body (1), and the electromagnetism valve assembly (7) is mounted on the lateral wall of box body (1), described Pilot valve (6) is connected with electromagnetism valve assembly (7)；

The connecting terminal (8) is mounted in box body (1), each group connecting terminal (8) respectively with the first contact-making switch (4), second Contact-making switch (5), pilot valve (6) are connected.

2. valve positioner according to claim 1, it is characterised in that: box body (1) side wall is formed with through-hole (101), the cable of connection pilot valve (6) and electromagnetism valve assembly (7) is arranged across through-hole (101), installation in the through-hole (101) There are explosion-proof stopple (9).

3. valve positioner according to claim 2, it is characterised in that: the explosion-proof stopple (9) passes through with through-hole (101) It is threadedly coupled cooperation.

4. valve positioner according to claim 3, it is characterised in that: the explosion-proof stopple (9) is in T-shape, described anti- O-ring seal (10) are equipped between blast hole plug (9) and box body (1).

5. valve positioner according to claim 1, it is characterised in that: the wheel disc (31) is in quadrant, described The arc groove (311) there are two different radii is set on wheel disc (31), first contact (32) is pacified respectively with the second contact (33) On two arc grooves (311).

6. valve positioner according to claim 5, it is characterised in that: first contact (32) and the second contact (33) Using different color marks.

7. valve positioner according to claim 1, it is characterised in that: be provided with side wall part at the top of the box body (1) Transparent housing (11), housing (11) is interior to be equipped with display module (12), and shaft (2) upper end is extended at the top of box body (1), and It connects display module (12).

8. valve positioner according to claim 1, it is characterised in that: the side of box body (1) corresponding wiring terminal (8) Wall is equipped with wiring hole (13), and spiral is connected with cable entry (14) at the wiring hole (13).

9. valve positioner according to claim 1, it is characterised in that: the box body (1) includes pedestal (15), upper cover (16), sealing ring (17) are equipped between the pedestal (15), upper cover (16).