KR101559953B1 - actuator for ball valve - Google Patents

Abstract

The present invention relates to an actuator for a ball valve, without a contact point (soldering) of PCB shorted, which stably transmits an electrical signal, comprising: a terminal of a switch and PCB point contacted (soldered) by a lead wire; and stress received by the switch for transforming the flexible lead wire.

Description

[0001] The present invention relates to an actuator for a ball valve,

The present invention relates to a lead-free soldering method and a lead-free soldering method, in which a terminal of a switch and a PCB are soldered by a lead wire to deform a lead wire in which the stress applied by the switch is flexible, To an actuator for a valve.

The conventional electric opening / closing apparatus 12 is a device that can open and close the ball valve 11 of the hot water distributor automatically and manually. As shown in Figs. 1 and 2 of Patent Document 1, The output is amplified by the gear 5 (5), the gear 4 (4), the gear 3 (3), the gear 2 (2) and the gear 1 (1) in the electric opening / The rotation stopper 20 attached to the gear 1 1 presses the micro switch 17 attached to the gear 1 1 to complete the operation of the electric opening and closing device 12. [ The output generated from the electric motor 6 of the electric opening and closing apparatus 12 is transmitted from the gear 5 to the gear 1 and transmitted to the ball 1 through the ball valve connecting shaft 9 integrated with the gear 1 The ball valve 11 is rotated and the forward and reverse directions of the motor-operated switching device 12 are enabled by a power supply input through a separate control device outside the motor-operated switching device 12, And the ball valve 11 are coupled to each other as a plate 14 to which a high-strength insert nut 13 is attached and a screw 15 for fastening an electric opening and closing apparatus, The rotational force of the electric opening and closing device 12 is transmitted to the ball valve 11 through the ball valve connecting shaft 9 and the electric opening and closing device 12 is closed to complete the opening or closing of the ball valve 11. [ A PCB 16 and a micro switch 17 are mounted in the interior of the gear 1, (20) rotates simultaneously with the rotation of the gear (1), and naturally presses the micro switch (17), so that the ball valve (11) stops at the correct position.

The micro switch 17 and the rotation stopper 20 are placed on the upper surface of the PCB 16 as shown in Fig.

Particularly, the terminals 17a and 17b of the micro switch 17 are connected to each other by soldering at the back surface after passing through the through holes of the PCB 16 as shown in FIG.

The terminals 17a and 17b of the micro switch 17 are metal in the form of a rigid body.

The micro switch 17 is adhered to the PCB 16 with a clearance therebetween due to an assembly tolerance or the like and a gap is also formed between the terminals 17a and 17b and the through holes of the PCB 16. [

In this layout, when a force is applied to the micro switch 17 during forward rotation or reverse rotation, the force SF is received in a form that the switch 17 is sheared with respect to the PCB 16 as shown in FIG. 3, The terminals 17a and 17b are tilted to the left and right by a gap like the switch 17 and the soldered contact portion of the PCB 16 is broken and the risk of short circuiting is very high.

DC motors require a device to convert when using AC power.

When the motor is an AC motor, the lead wire RW1 (RW2) of the capacitor C comes out of the through hole of the PCB 16 like the terminals 17a and 17b of the switch as shown in FIG. 3, I do.

A pattern for electrical connection is formed on the back surface of the PCB 16 which has a contact point.

The condenser (C) makes the direct current (DC) not to flow but the alternating current is allowed to pass and the AC power can be directly connected and used.

Since the lead wires RW1 and RW2 of the condenser C are soldered to the pattern of the PCB 16 in this manner, a micro switch cable CA1 and a cable CA2 for the flow of electric signals are further required, The cable CA1 and the cable CA2 are further subjected to a process of soldering to the PCB 16. [ The cable (CA) is a common cable.

5, the ball valve 30 is provided with an electric opening / closing device 10 at an upper end thereof, and an electric opening / closing device 10 and a ball valve 30 A swing plate 21, a slide plate 22 and a fixing plate 23 are provided to directly supply the AC power to the power supply wire 11 on the side of the electric opening and closing apparatus 10.

5, the internal configuration of the electric ball valve is such that the AC power input through the power supply wire 11 is mounted inside the cover 14 of the electric opening and closing apparatus 10 according to an external signal The AC motor 12 is rotated and the transmission opening / closing device output shaft 13 coupled to the AC motor 12 is rotated. When the opening and closing operations of the ball valve 30 are completed, the motor-driven opening and closing device output shaft 13 rotates and naturally presses the micro switches 15a and 15b attached to the PCB 16 and opens the ball valve 30 Or the closing operation is ended. The power supply wire 11, the AC motor 12, the electric opening and closing device output shaft 13, the micro switches 15a and 15b, and the PCB 16, The ball valve 30 can be opened and closed simply through the electric opening and closing device 10 constituted by the cover 14 and the like and the electric opening and closing device output shaft 13 attached to the electric motor 12 is connected to the PCB The ball valve 30 can be accurately opened or closed by interrupting the micro-switches 15a and 15b attached to the ball valves 15 and 16.

The terminals 15a 'and 15b' of the micro switches 15a and 15b of the patent document 2 are also inserted into the through holes of the PCB 16 as shown in the patent document 1 and contacted by soldering at the back surface.

6, the force exerted by the output shaft 16 on the microswitches 15a and 15b applies a normal force NF to the PCB 16, not the front end.

Therefore, the switches 15a and 15b are pushed toward the PCB 16, and the terminals are also pushed together to enter the contact portion.

3, since the lead wire RW1 (RW2) of the capacitor C is soldered to the pattern of the PCB 16, the capacitor C is connected to the cable for the micro switch CA1 and the cable The cable CA1 and the cable CA2 are required to be soldered to the PCB 16. [

Patent Document 1: Public Utility Model 20-2009-0002054 Patent Document 2: Patent Document 10-2011-0115189

SUMMARY OF THE INVENTION It is an object of the present invention to provide an actuator for a ball valve which eliminates the risk of short-circuiting a contact point by preventing the stress applied to the switch from being transmitted to the PCB.

In order to achieve the above-mentioned object, the actuator for a ball valve according to claim 1 of the present invention comprises: a case composed of an upper case and a lower case; A PCB mounted on the upper case; A first switch which is in contact with the PCB; A second switch that is in contact with the PCB; A motor mounted on the upper case; And an output for switching the direction of the ball valve by opening and closing the first switch or the second switch by rotating the motor in normal and reverse directions in accordance with the electric signal of the first switch or the second switch, Wherein at least one of the two terminals of the first switch and the PCB is soldered by a first lead wire and at least one of the two terminals of the second switch and the PCB are soldered to a second lead wire, .

According to the construction of claim 1, even if stress is applied to the switch by the first lead wire and the second lead wire being flexible, the stress is absorbed by the deformation of the lead wire, thereby preventing the soldering portion from being short-circuited with the PCB.

In the actuator for a ball valve according to claim 2 of the present invention, the terminals of the first switch and the terminals of the second switch are disposed apart from the front surface of the PCB.

According to the configuration of claim 2, the switch is disposed apart from the PCB to more reliably prevent the stress of the switch from being transmitted to the PCB.

In the ball valve actuator according to the third aspect of the present invention, the PCB is disposed in a direction parallel to the output shaft, and the upper case is provided with an intermediate plate spaced apart from the PCB in a direction perpendicular to the PCB, The first switch and the second switch are mounted on the upper surface of the housing.

According to the configuration of claim 3, the intermediate plate itself is fixed to be spaced apart from the PCB, so that the switch can be separated from the PCB.

In the actuator for a ball valve according to claim 4 of the present invention, on the upper surface of the intermediate plate, a first guide bar for guiding both side surfaces of the first lead wire and a second guide bar for guiding both side surfaces of the second lead wire are formed have.

According to the configuration of claim 4, while the lead wire is guided linearly with respect to the switch and the PCB, the lead wire is prevented from being externally impacted during assembly.

The present invention has the following effects.

At least one of the two terminals of the first switch and the PCB are soldered by the first lead wire and at least one of the two terminals of the second switch and the PCB are soldered by the second lead wire, The lead wire is flexible so that even if the output cam applies force to the switch, the force is not directly transmitted to the soldering portion with the PCB due to the deformation of the lead wire, thereby preventing a short circuit.

In particular, the leads of the switch and the PCB are arranged so as to be separated from each other by the lead wire, thereby eliminating the adverse effect that the switch itself pushes the PCB.

Also, since the switch is installed on the middle plate and the middle plate is fixed firmly away from the PCB, the switch ensures the separation from the PCB.

On the other hand, a guide bar for guiding both side surfaces of the lead wire is protruded from the intermediate plate, thereby guiding the lead wire exposed between the terminal of the switch and the front side of the PCB linearly, while preventing external impact during assembly.

1 is an assembled cross-sectional view of a conventional electric opening / closing apparatus and a ball valve
Fig. 2 is an internal layout view of the electric opening /
3 is a schematic structural view for explaining an operation of the electric opening / closing apparatus of Fig.
Figure 4 is a side view of another conventional motorized ball valve assembly of Figure 4;
Fig. 5 is an internal configuration diagram of Fig. 4; Fig.
FIG. 6 is a schematic structural view for explaining the operation of FIG. 4;
7 is a bottom perspective view of an actuator for a ball valve according to a preferred embodiment of the present invention.
8 is an exploded perspective view of Fig.
Fig. 9 and Fig. 10 are plan views of the state in which the lower case is removed in Fig. 7, showing the states of the contacts of the switches in forward rotation and reverse rotation.
11 is a schematic structural view for explaining a main part of the present invention.
11A is a circuit diagram for an actuator for a ball valve of the present invention.
12 is a schematic structural view for explaining a main part of the present invention in the case of a DC motor;

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment 1: An actuator for a ball valve which is an AC motor

7 is an exploded perspective view of the ball valve actuator according to a preferred embodiment of the present invention, Fig. 8 is an exploded perspective view of Fig. 7, Figs. 9 and 10 are plan views of a state in which the lower case is removed in Fig. Fig. 11 is a schematic diagram for explaining a main part of the present invention, and Fig. 11A is a circuit diagram for an actuator for a ball valve according to the present invention.

As shown in FIGS. 7 to 11, the actuator for a ball valve according to the first embodiment includes a case 100 forming an outer shape, a PCB 300 mounted on the case 100, A capacitor 500 disposed on the back side of the PCB 300, an AC motor 700 mounted on the case 100, an AC motor 700, And an output cam 900 provided on the output shaft 710 of the output shaft 710.

The case 100 includes an upper case 110 and a lower case 150.

The upper case 110 is formed with a mounting chamber 111 on which the AC motor 700 and the PCB 300 are to be mounted.

The lower case 150 is formed with an insertion hole 151 into which a stem (not shown) of a ball valve (not shown) is inserted and coupled to the output cam 900.

The upper case 110 and the lower case 150 are fastened to each other by the joint 130 and the screw 170.

The joint 130 includes a locking protrusion 131 of the upper case 110 and a locking protrusion 133 formed on the lower case 150 and hooked on the locking protrusion 131.

The AC motor 700 is mounted on the mounting chamber 111, and the AC power can be used as it is.

Also, in the AC motor 700, the capacitor 500 is used. That is, the capacitor 500 serves to prevent the direct current from flowing but to allow the alternating current to flow.

The PCB 300 is mounted on a PCB mounting plate 720 mounted on one side of the outer circumference of the AC motor 700.

The PCB mounting plate 720 is mounted on a side of the cylinder of the AC motor 700 which is formed at a right angle.

The PCB 300 is disposed in parallel with the output shaft 710 of the AC motor 700.

In this case, the terminal of the AC motor 700 may be connected to the PCB 300 through the PCB mounting plate 720.

The first switch 410 and the second switch 430 are disposed in a direction perpendicular to the output shaft 710.

In addition, the first switch 410 and the second switch 430 are fixed through the intermediate plate 200.

The intermediate plate 200 is fastened to the upper case 110 so as to be spaced apart from the output shaft 710 or the PCB 300 in a direction perpendicular to the direction.

The intermediate plate 200 is formed with a take-out hole 201 through which the output shaft 710 is drawn.

On the upper surface of the intermediate plate 200, hooking hooks 210 and 230 protruding upward to prevent the first switch 410 and the second switch 430 from being pulled up.

Switch positioning pins 251 and 253 for determining the positions of the first switch 410 and the second switch 430 protrude from the upper surface of the intermediate plate 200.

The switch positioning pins 251 and 253 include a first switch positioning pin 251 inserted into the body of the first switch 410 and the second switch 430 and a second switch positioning pin 251 disposed around the body, And a pin 253.

When the intermediate plate 200 is fastened to the upper case 110, the upper surface of the AC motor 700 is also pressed and mounted.

A plate positioning pin 120 for determining the position of the intermediate plate 200 is protruded from the upper case 110.

The intermediate plate 200 is formed with a plate positioning hole 121 into which the plate positioning pin 120 is inserted.

The first lead line 510 of the condenser 500 is directly connected to at least one of the two terminals of the first switch 410 while passing through the first through hole 310 of the PCB 300 from the back surface to the front, And contacts the terminals of the PCB 300 and the first switch 410.

The second lead wire 530 of the condenser 500 is directly connected to at least one of the two terminals of the second switch 430 while passing through the second through hole 330 of the PCB 300 from the back surface to the front surface, And contacts the terminals of the PCB 300 and the second switch 430.

11, the first terminal 411 of the first switch 410 is directly connected to the first lead wire 510 of the capacitor 500 by soldering, (413) is soldered to the cable (CA1).

The first terminal 431 of the second switch 430 is directly soldered to the second lead wire 530 of the capacitor 500 and the second terminal 433 of the second switch 430 is connected to the cable CA2, The solder is contacted.

The first and second terminals 411 and 413 of the first switch 410 and the first and second terminals 431 and 433 of the second switch 430 may be bent and brazed in a bent or bent shape.

The first lead wire 510 and the second lead wire 530 of the capacitor 500 are soldered to a pattern formed on the back surface of the PCB 300.

A common cable CA is soldered to the front surface of the PCB 300.

These cables CA1 and CA2 are connected to a connector CN connected to a controller (not shown).

The first and second lead wires 510 and 530 of the capacitor 500 are directly connected to the first terminals 411 and 431 of the first and second switches 410 and 430, And the number of processes and parts such as the number of parts.

The first and second lead wires 510 and 530 of the condenser 500 are made of a flexible material.

The first and second lead wires 510 and 530 of the capacitor 500 are usually made of a wire having flexibility that is bent like a wire.

Therefore, even if the force (stress) generated when the output cam 900 opens or closes the first switch 410 or the second switch 430 is transmitted to the first and second lead wires 510 and 530, Unlike the first terminals 411 and 431 which are rigid bodies, it is possible to eliminate the risk that the soldering portions with the PCB 300 are lowered by absorbing or deforming the first terminals 411 and 431.

9 and 10, a first guide bar 510a for guiding opposite side surfaces of the first lead wire 510 and a second guide bar 510b for guiding opposite side surfaces of the second lead wire 530 to the upper surface of the intermediate plate 200, A second guide bar 530a is formed to protrude.

The first guide bar 510a and the second guide bar 530a guide the first and second lead wires 510 and 530 in a straight line to prevent the first and second lead wires 510 and 530 from being touched from the outside during assembly.

The deformation of the first and second lead wires 510 and 530 according to the stresses of the switches 410 and 430 is also allowed in the first and second guide bars 510a and 530a.

On the other hand, in the upper case 110, a cable lead-out groove 140 is formed as shown in Fig.

The cable lead-out groove 140 serves as a passage through which the cables CA1 and CA2 enter the upper case 110. [

Since the PCB 300 is disposed in front of the cable lead-out groove 140, the upper case 110 may be provided with a shield plate 115 therebetween.

As shown in Figs. 9 and 10, the shield plate 115 prevents the cables CA1 (CA1) and CA2 from touching the back surface of the PCB 300 to give an adverse effect.

Both sides of the cable CA are connected to the upper case 110 and the intermediate plate 200 by means of guides (not shown) so as to more reliably prevent the cables CA1 and CA2 from touching the back surface of the PCB 300, A second cable guide bar 193 for guiding the cable CA1 and a third cable guide bar 195 for guiding the cable CA2 are formed.

 It is preferable that a packing cap 160 having a lead-out hole through which the cables CA1 and CA2 are drawn out is inserted into the cable lead-out groove 140 for sealing.

O ring mounting grooves 181 and 183 are formed on the upper surface of the packing cap 160 and the upper surface of the upper edge of the upper case 110.

An O-ring 185 is attached to the O-ring mounting grooves 181 and 183 to perform sealing more reliably.

The action of the ball valve actuator thus constructed is as follows.

The AC motor 700 is stopped in a state in which the output cam 900 is ON (solid line) with the first switch 410 and the second switch 430 is OFF (solid line) as shown in Figs. 9 and 11A.

In this state, if the ball valve is operated externally to switch the valve, electricity flows through the common cable (CA), the PCB 300, the first lead wire 510 and the cable CA1, The AC motor 700 and the output cam 900 rotate in the opposite directions.

When the first switch 410 is turned OFF (dotted line) and the second switch 430 is turned ON (dotted line) as shown in FIGS. 10 and 11A, electricity flowing in the first switch 410 flows The AC motor 700 is stopped, and the second switch 430, which does not supply electricity, is in the ON state.

Electricity flows through the common cable CA, the PCB 300, the second lead wire 530, and the cable CA2, which are closed together, or vice versa when electric power is supplied to the second switch 430 to rotate in the forward direction again. The AC motor 700 is stopped when the AC motor 700 and the output cam 900 are rotated in the forward direction and the second switch 430 is turned off and the first switch 410 is turned on.

Example  2 : DC Actuator for Ball Valve Motor

Unlike an AC motor, a DC motor can be replaced by a device that converts AC power to DC power without using a capacitor.

12 is an actuator for a ball valve which is a DC motor.

12, the first lead line 510 'and the second lead line 530' are the same as the first and second lead lines 510 and 530 of the capacitor 500 as in the first embodiment, Only a lead wire made of a material is soldered to the PCB 300 and the first terminals 411 and 431.

The output cam 900 applies stress to the first switch 410 or the second switch 430 so that the flexible material of the first lead line 510 'and the second lead line 530' 1, the soldering portion of the PCB 300 is not deteriorated through absorption or deformation, and the electrical connection is stably performed.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims .

100: Case 110: Upper case
111: mounting chamber 120: plate positioning pin
121: plate positioning hole 115:
130: joint 131:
133: latching jaw 140: cable drawing groove
150: Lower case 151: Insertion hole
160: packing cap 170: screw
181,183: O-ring mounting groove 185: O-ring
191, 193, 195: first, second and third cable guide bars 200:
201: drawer 210, 230: hooking hook
251,253: 1st and 2nd switch positioning pins 300: PCB
310, 330: first and second through holes 410, 430: first and second switches
411, 431: First terminal 413, 433: Second terminal
500: Capacitors 510 and 530: Capacitor first and second lead wires
510 ', 530': first and second lead wires 510a and 530a: first and second guide bars
700: motor 710: output shaft
720: PCB mounting plate 900: Output cam
CA, CA1, CA2: Common cable CN: Connector
NP: normal force SP: shear force

Claims (4)

A case made up of an upper case and a lower case;
A PCB mounted on the upper case;
First and second switches disposed on the front side of the PCB;
A motor mounted on the upper case;
And an output for switching the direction of the ball valve by opening and closing the first switch or the second switch by rotating the motor in normal and reverse directions in accordance with the electric signal of the first switch or the second switch, cam;
And first and second lead wires that are solder-contacted with the first and second switches and the back surface of the PCB,
Wherein the first lead wire is directly connected to at least one of the two terminals of the first switch,
Wherein the second lead wire is directly connected to at least one of the two terminals of the second switch while penetrating from the back surface to the front surface of the PCB.
The method according to claim 1,
And the terminals of the first switch and the terminals of the second switch are disposed apart from the front surface of the PCB.
The method of claim 2,
Wherein the PCB is disposed in a direction parallel to the output shaft,
Wherein the upper case is provided with an intermediate plate spaced apart from the PCB in a direction perpendicular to the PCB,
And the first switch and the second switch are mounted on an upper surface of the intermediate plate.
The method of claim 3,
Wherein a first guide bar for guiding both side surfaces of the first lead wire and a second guide bar for guiding both side surfaces of the second lead wire are formed on the upper surface of the intermediate plate.

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