CN213685465U - Torsional spring over-force protection mechanism of electric valve actuator - Google Patents

Abstract

The utility model relates to an electric valve technical field just discloses an electric valve executor torsional spring excess force protection mechanism, including valve executor shell and output shaft, valve executor shell inner chamber bottom one side fixedly connected with a plurality of telescopic link, the one end fixedly connected with diaphragm of valve executor shell is kept away from to the telescopic link, one side center department that the telescopic link was kept away from to the diaphragm has seted up the spread groove, the inside fixed cup joint of spread groove has the pivot. This kind of electric valve executor torsional spring is power protection mechanism excessively, through the setting of swivel nut and pivot, open valve executor control box, the control output shaft rotates, the output shaft drives the screw rod and rotates, the screw rod drives the pivot downstream that the swivel nut passes through the swivel nut outer lane and connects, drive the diaphragm downstream, the diaphragm drives the connecting rod downstream, the connecting rod removes to switch department, the switch of contradicting, it rotates to close the output shaft, effectively prevent the over-force overload condition from taking place, the injury to electric valve controller has been reduced.

Description

Torsional spring over-force protection mechanism of electric valve actuator

Technical Field

The utility model relates to an electric valve technical field specifically is an electric valve executor torsional spring excess force protection mechanism.

Background

The electric valve actuator is an important electromechanical integrated device in the field of automatic control, is used for driving valves of various specifications and models to realize automatic opening and closing or continuous adjustment of the valves, and the stroke control device is an important component of the electric actuator and has the functions of controlling the terminal position of the valve switch and transmitting a signal of the position, thereby realizing automatic control and centralized program control of the electric valves.

The problem that a switch torsion spring is damaged under the condition of overlarge stress exists in the existing electric valve actuator, so that the service life of the electric valve actuator is seriously influenced, the later-period maintenance cost is high, and the problem of over-force cannot be perfectly solved.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides an electric valve executor torsional spring excess force protection mechanism possesses effectively to prevent that the excess force overload condition from taking place, has reduced the injury to electric valve controller, convenient to detach, and has effectively prolonged advantages such as the life of switch, has solved the problem that the background art provided.

(II) technical scheme

For realizing that the aforesaid possesses effectively to prevent the emergence of the overload condition of doing over-force, reduced the injury to electric valve controller, convenient to detach, and effectively prolonged the purpose of advantages such as the life of switch, the utility model provides a following technical scheme: an electric valve actuator torsional spring over-force protection mechanism comprises a valve actuator shell and an output shaft, wherein one side of the bottom of an inner cavity of the valve actuator shell is fixedly connected with a plurality of telescopic rods, one end of each telescopic rod, far away from the valve actuator shell, is fixedly connected with a transverse plate, the central part of one side of each transverse plate, far away from the telescopic rods, is provided with a connecting groove, a rotating shaft is fixedly sleeved inside the connecting groove, one end of the output shaft is fixedly connected with a screw rod, a screw sleeve is fixedly sleeved on the outer ring on one side of the screw rod, the outer ring of the screw sleeve is fixedly connected with the inner ring of the rotating shaft, a valve actuator control box is fixedly arranged on one side of the valve actuator shell, a connecting rod is fixedly arranged on one, the switch is electrically connected with the valve actuator control box.

Preferably, the bottoms of the two sides of the fixing block are fixedly provided with side plates, and the top of each side plate is in threaded connection with a fastening bolt.

Preferably, each telescopic link is vertical setting, just each the telescopic link all is symmetry each other.

Preferably, the rotating shaft is matched with the connecting groove, and the threaded sleeve is matched with the rotating shaft.

Preferably, each fastening bolt penetrates through a side plate to be in threaded connection with the valve actuator shell, and each side plate is rectangular.

(III) advantageous effects

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. this kind of electric valve executor torsional spring is power protection mechanism excessively, through the setting of swivel nut and pivot, open valve executor control box, the control output shaft rotates, the output shaft drives the screw rod and rotates, the screw rod drives the pivot downstream that the swivel nut passes through the swivel nut outer lane and connects, drive the diaphragm downstream, the diaphragm drives the connecting rod downstream, the connecting rod removes to switch department, the switch of contradicting, it rotates to close the output shaft, effectively prevent the over-force overload condition from taking place, the injury to electric valve controller has been reduced.

2. This kind of electric valve executor torsional spring is power protection mechanism through fastening bolt's setting, when needing to maintain or change the switch, twists fastening bolt, through the fixed curb plate that sets up in fixed block both sides bottom, curb plate top threaded connection's fastening bolt, fastening bolt runs through curb plate and valve executor shell threaded connection, twists fastening bolt out, can take off fixed block and switch, maintains the change work, convenient to detach, and effectively prolonged the life of switch.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the switch structure of the present invention;

fig. 3 is a schematic structural diagram of a point a in fig. 2 according to the present invention.

In the figure: 1. a valve actuator housing; 2. a screw; 3. an output shaft; 4. a telescopic rod; 5. a transverse plate; 6. A valve actuator control box; 7. fastening a bolt; 8. a connecting rod; 9. a side plate; 10. a fixed block; 11. A switch; 13. a threaded sleeve; 14. a rotating shaft; 15. and connecting the grooves.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Referring to fig. 1-3, an electric valve actuator torsional spring over-force protection mechanism comprises a valve actuator housing 1 and an output shaft 3, wherein one side of the bottom of the inner cavity of the valve actuator housing 1 is fixedly connected with a plurality of telescopic rods 4 for lifting connecting rods 8, one end of each telescopic rod 4 far away from the valve actuator housing 1 is fixedly connected with a transverse plate 5 for arranging a connecting groove 15, the center of one side of the transverse plate 5 far away from the telescopic rods 4 is provided with the connecting groove 15 for sleeving a rotating shaft 14, the inside of the connecting groove 15 is fixedly sleeved with the rotating shaft 14, one end of the output shaft 3 is fixedly connected with a screw rod 2 for moving the screw sleeve 13, the outer ring of one side of the screw rod 2 is fixedly sleeved with a screw sleeve 13, the outer ring of the screw sleeve 13 is fixedly connected with the inner ring of the rotating shaft 14 for rotating, the connecting rod mechanism comprises a valve actuator shell, a fixing block 10 and a connecting rod, wherein the fixing block 10 is arranged at the bottom of an inner cavity of the valve actuator shell 1 and located at the bottom of the connecting rod 8, the switch 11 is arranged and fixed on the top of the fixing block 10, the switch 11 is fixedly arranged on the top of the fixing block and used for controlling the rotation of an output shaft 3, the switch 11 is electrically connected with a valve actuator control box 6, each telescopic rod 4 is vertically arranged, each telescopic rod 4 is symmetrical to each other, a rotating shaft 14 is matched with a connecting groove 15, and a threaded.

Example two

Based on the first embodiment, as shown in fig. 1 to 3, the bottom of each of the two sides of the fixing block 10 is fixedly provided with a side plate 9 for setting a fastening bolt 7, the top of each side plate 9 is in threaded connection with a fastening bolt 7 for fixing the fixing block 10 in a threaded manner, each fastening bolt 7 penetrates through the side plate 9 to be in threaded connection with the valve actuator housing 1, and each side plate 9 is rectangular.

The working principle is as follows: open valve actuator control box 6, control output shaft 3 rotates, output shaft 3 drives screw rod 2 and rotates, screw rod 2 drives swivel nut 13 and moves down through pivot 14 that the swivel nut 13 outer lane is connected, drive diaphragm 5 and move down, diaphragm 5 drives connecting rod 8 and moves down, connecting rod 8 moves to switch 11 department, conflict switch 11, close output shaft 3 and rotate, effectively prevent the over-force overload condition and take place, reduced the injury to electric valve controller.

When needing to maintain or change switch 11, twist and move fastening bolt 7, through the fixed curb plate 9 that sets up in fixed block 10 both sides bottom, 9 top threaded connection's of curb plate fastening bolt 7, fastening bolt 7 runs through curb plate 9 and 1 threaded connection of valve actuator shell, screws out fastening bolt 7, can take off fixed block 10 and switch 11, maintains the change work, convenient to detach, and effectively prolonged switch 11's life.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. An over-force protection mechanism for a torsion spring of an electric valve actuator comprises a valve actuator shell (1) and an output shaft (3);

the method is characterized in that:

the valve actuator comprises a valve actuator shell (1), wherein a plurality of telescopic rods (4) are fixedly connected to one side of the bottom of an inner cavity of the valve actuator shell (1), a transverse plate (5) is fixedly connected to one end, away from the telescopic rod (4), of the telescopic rod (4), a connecting groove (15) is formed in the center of one side, away from the telescopic rod (4), of the transverse plate (5), a rotating shaft (14) is fixedly sleeved inside the connecting groove (15), a screw rod (2) is fixedly connected to one end of an output shaft (3), a threaded sleeve (13) is fixedly sleeved on the outer ring of one side of the screw rod (2), the outer ring of the threaded sleeve (13) is fixedly connected with the inner ring of the rotating shaft (14), a valve actuator control box (6) is fixedly arranged on one side of the valve actuator shell (1), a connecting rod (8) is fixedly arranged on one side of, the top of the fixing block (10) is fixedly provided with a switch (11), and the switch (11) is electrically connected with the valve actuator control box (6).

2. The electric valve actuator torsion spring over-force protection mechanism of claim 1, wherein: the bottom parts of two sides of the fixing block (10) are fixedly provided with side plates (9), and the top of each side plate (9) is in threaded connection with a fastening bolt (7).

3. The electric valve actuator torsion spring over-force protection mechanism of claim 1, wherein: each telescopic rod (4) is vertically arranged, and the telescopic rods (4) are symmetrical to each other.

4. The electric valve actuator torsion spring over-force protection mechanism of claim 1, wherein: the rotating shaft (14) is matched with the connecting groove (15), and the threaded sleeve (13) is matched with the rotating shaft (14).

5. The electric valve actuator torsion spring over-force protection mechanism of claim 2, wherein: each fastening bolt (7) penetrates through a side plate (9) to be in threaded connection with the valve actuator shell (1), and each side plate (9) is rectangular.

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