CH651955A5 - Method and testing apparatus for ensuring the operational safety of valves having electric actuators - Google Patents

Description

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PATENT CLAIMS characterized in that a display (36) for the direction of the

1. Procedure for ensuring the operational safety of the rotating field for actuators with a three-phase motor provided by fittings with electrical actuators in poor condition.

accessible systems, in particular in nuclear power plants, by 17. Test device according to one of claims 7 to 16, characterized in repeated function tests of the Ar- 5, characterized in that a key switch (56) for short-term valves, characterized in that the electrical actuation of the Actuator (3) of the valve to be tested (1)

Values of the actuator determined before starting operation is provided.

and that the same values are determined again in subsequent tests.

2. The method according to claim 1, characterized in that 10 the power of the actuator is determined over the travel of the valve. The invention relates to a warranty method

3. The method according to claim 1 or 2 for an actuator- the operational safety of fittings with an electric actuator with a multi-phase motor, characterized in drives in poorly accessible systems, in particular in that the current is measured in each phase. 15 nuclear power plants, by repeated at intervals

4. The method according to any one of claims 1 to 3, thereby functional tests of the fittings.

characterized that the operating time of the valve with such tests has so far been practically only determined

An electrical timer is determined. Checks whether the valve is working as intended, i.e. opens

5. The method according to any one of claims 1 to 4, thereby or closes. If not, the tested valve has already been marked with a sign that the electrical values are in need of a written code.

device can be recorded. Preventive error detection was previously against it

6. The method according to any one of claims 1 to 5, not possible. However, this is precisely what is characteristic of poorly accessible ones that the electrical values are important for two different systems, because voltages found there can only be determined with particular effort. can be worked. For those primarily affected

7. Test device for carrying out the method according to a 25 nuclear power plant, the effort arises from the necessity of claims 1 to 6, characterized in that the radiation shielding speed. It must be taken into account that portable housings (14) that measure the electrical devices (33, 34, 35) that have not yet been identified as an impending failure of Arma values, in particular in nuclear power plants, are included in a shutdown that the housing (14), which can result in the actuation of one of the consequences that downtime costs of 1 actuator (3) have the necessary switching device (45) per day, DM 30 million or more.

that the switching device is coupled to a control part. According to the invention, to solve the aforementioned problem associated with the function of a fitting (1), the electrical values of the actuating device

The electronically stored program shows that the drives are determined before the start of operation and that the

Control part in an identical value shielded by the switching device is determined again in the following tests

Part of the housing (14) is arranged and that the housing 35.

Plug connection parts (26 to 29) for the detachable connection.

the switching device and the control part. watches that the valve opens or closes or

8. Testing device according to claim 7, characterized in that it occupies the desired defined intermediate positions. Rather, that the control part has several programs and that an image is assigned to these programs from the electrical values of the actuator, which is provided on the housing (14) 40 for the normal, in particular new, wear-free switch (64 to 70) which the program gained state so that deviations from it are made effective. can be. If the deviations exceed a tolerance

9. Test device according to claim 8, characterized in that the rance limit can be prevented by a preventive repair, that is to say that the housing (14) is provided with a circuit diagram (50), by an intervention in the fitting and / or the actuator at least in parts of the Switching device and the control drive, which eliminates wear and tear and corresponds to the new state of the cut part and has a region (51) which can be exchanged with a larger further operating program in accordance with the respective speaking state. permanent expectation will be made up to the next

10. Testing device according to claim 7 or 8, characterized as scheduled shutdown is sufficient. Disturbances while records that the housing (14) a switch (55) for operation are avoided.

Interrupting the operation specified with the program. An opening, or the actuator (3), is an essential variable. Close necessary performance determined. This achievement is

11. Test device according to one of claims 7 to 10, characterized in a first approximation a measure of the movement of the valve that the housing (14) has at least one malfunction and can therefore because switch to a fault switch (72 to 77) , with which an error in which the is indicated, can be taken as a reason for a repair. Function assigned to the program is to be specified. 55 In addition, as electrical values of the actuator

12. Test device according to claim 11, characterized in that the opening and closing times of the valve also determine that the fault switch is the bypass or interruption and represents the safe functioning of limit switches, a limit switch of the actuator. In any case, the invention enables a much more precise one

13. Test device according to one of claims 7 to 12, characterized and, above all, predictive check of the train indicates that in the course of the circuit diagram control level 60 of the fittings than that in the previously customary radio lights (54) are arranged, which are at least partially above tion test was possible.

the connector parts are fed. In a proven embodiment of the invention

14. Tester according to claim 13, characterized in that the power of the actuator is determined over the travel of the Ar-that each contact piece of the connector parts a maturity. In the case of faults, the inso control lamp (54) can be assigned from this. 65 draw conclusions more clearly than can be seen, for example

15. Test device according to claim 13 or 14, characterized an actuating spindle of a valve in a particular by luminescent diodes (54) as control lights. Area is stiff and therefore faulty and there

16. Test device according to one of claims 7 to 15, thereby appears to be in need of repair.

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The power measurement can be avoided like any other drive measurement with an emergency stop. In actuators with a multi-phase motor, this is particularly advantageous in connection with a different measurement of the current in each phase, because this is the further development in which the housing provides at least the most precise information. In addition, there is also a locking fault switch with which an error in which the radio, whether the motor has winding damage, can be specified in the program assigned to the function. Such an otherwise not noticeable. Fault switch enables testing of consecutively

The actuation time of the valve can be determined with the aid of a switched safety device, because individual safety-electrical timers are determined, so that an adapting device is taken out of operation, to determine the electrical values of the actuator. Example in such a way that the fault switch bridging In addition, such electrical timers can also usually be easily set or interrupted by a limit switch of the actuator and used for control purposes. represents.

The electrical values can advantageously be recorded using a device that writes the test device in the course of the circuit diagram. This enables troll lights to be supplied, which are fed at least in part via a subsequent and precise evaluation and facilitates plug-in connection parts. For both comparison with previously determined values, for example the 15 game each contact piece of the connector parts a new valve. However, it is also entirely possible to be assigned an electrical control lamp, so that the function of the see, in particular magnetic, recording method of the plug connection can be checked easily. This is to be used for analogous purposes, both for measured values in the aforementioned use of untrained personal-analogue and in digital form. nal important. Are particularly suitable as control lights

For a meaningful test, it can also be advantageous 20 luminescent diodes.

may be if the electrical values for two different am tester can also display the direction

Voltages are determined. On the one hand, the possibility of the rotary field for actuators with a three-phase motor can be taken into account that the functions are reliable. In addition, a push-button switch is also useful for short-term actuation of the actuator of the valve to be tested, even if the actuator cannot be excluded from the network.

Voltage fluctuations must be given. On the other hand, it is 25 stig, because it enables a test operation that can be inferred from the behavior at different voltages approaching certain positions, for example, the end genes often more precisely to certain faults. Positions, is well suited.

A test device which has been tried and tested for the method according to the invention. To explain the invention in more detail, an embodiment device is characterized in that in a portable example using the enclosed drawing, the housing described is required for the measurement of the electrical values. which are summarized in the only figure in approximately perspective loaned measuring devices, that the housing representation shows a valve with an electric actuator and the switch necessary for the actuation of an actuator shows the test device provided for its testing.

device that the switching device with a valve 1 with a nominal width of, for example

Control part is coupled, which has a function of a valve 100 mm belongs to a coolant cleaning system for an associated electronically stored program, ^ light water reactor. Its valve stem 2, which is arranged in a known manner in that the control part is connected in a manner remote from the switching device to a valve plate (not shown), shielded part of the housing and that the gear is actuated by an electric actuator 3. This housing plug-in connection parts for the detachable connection comprises a gear 4, on the top of which a handwheel 5 with a switching device and the control part. Handles 6 for emergency actuation of the valve 1 is provided.

The new tester is easy to handle and therefore for 40 For normal operation, an electric quick check in the short, flanged to the engine 7 for repairs, is well suited for repairs to the engine 7, for example, the performance of the time available. The good operability - 0.5 kW. The motor 7 is a three-phase synchronism is particularly promoted by the plug connections. gate. It is supplied with voltage via an electrical line 10. It enables untrained personnel to be supplied with power which ends in a plug 11. The plug leads to the necessary measurements to be checked, because only plugs 45 of an electrical connection box (not shown) are to be closed, which can be marked precisely and in motors 7. Another electrical line 12 with a plug requirement is also designed to be unmistakable and / or to lock 13 is for the transmission of control signals, for the ping. Then only the switching device with the help of game for the connection of limit switches is provided to put the stored program into action. The assigned from the gear 4 or the spindle 2.

The test device 15 is externally a cuboid-shaped case from the fittings any distance away and also 14 with a front plate 16, which are carried out for transportation at another time, so that this does not qualify illustrated cover can be covered. For this graceful staff regardless of the disabled access purpose, the lid is in loops 17 on which can be used with rubber fittings. 18 provided underside 19 of the test device 15

A particularly universally usable test device is so suspended 55 and then formed with known quick-release fasteners 20 that the control part has several programs and the upper side 21 is clamped. On the upper side 21, a carrying handle 22 is provided in the middle of each of these programs, which is provided on the housing and with which, for example, a switch is associated with which the program can be effectively transported about 20 kg testing device 15 . The housing can be provided with a circuit diagram. Four cutouts 25 are provided in the front plate 16, which at least in parts of the switching device 60 correspond to multi-pole plug connections with a rectangular cross section and the control part and one corresponding to the respective plugs 26, 27, 28 and 29 provided. Of these leads the program has interchangeable area. The connector 28 via the cable 10 to the motor 7, while the clarity achieved in this way is also advantageous for the operating connector 27 via the cable 12 to limit switches, torque by trained personnel. Switches or the like on the transmission 4 leads. The plug

It has also been shown that it is advantageous if the switch 65 29 is provided for the mains connection and is therefore connected via a housing to a switch for interrupting the supply line with the power line 30, which has a rotational program predetermined operation of the actuator . current of 380 V, for example. From the mains connection. Damage to the valve and the actuating device can also result in other voltages, in particular

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especially low voltages or direct voltages for controllers. To check the function of the circuit diagram 50

a key 61 is used, provided that they are not present in the indicator lights in the test device.

themselves can be converted from the three-phase current. The following are some operations when checking the

The plug 26 can be described via a further cable 31 in the demand valve 1, which is referred to as a fitting,

fall with other limit switches or torque switches or control 5 because such tests are also used for flaps, slide devices that are to be used for the operation of the like or the like.

Actuator 3 are required. Before actuating the actuator 3, the

In the front panel 16 there are also three of the same, a rough setting can be made in a limit switch

Row of ammeters 33, 34 arranged side by side and the. Then the valve moves when you activate a release

35, which, if necessary, via current transformers the current for the 10 key 62 and the key 57 (open) or the key 58 (closed) in the

Measure motor 7 of the actuator in the three phases corresponding to the end position and automatically

the three-phase network. Cut off the ammeter 33,34,35. In order to stop a rotary field control in the front plate 16 in order to stop the drive 3 before the end position or in the event of a fault, the stop button 60 is activated in automatic mode

lamp 36 and a rotating field warning light 37 arranged. The (without release) actuated or the release rotating field indicator lamp 36 shows for motor 7 the presence 15 and the command key released.

the voltage in the correct phase sequence, while the two are measured when the drive 3 is running,

Warning lamp 37 lights up when the phase sequence for the entire running time from the start of the drive to

Motor 7 does not correspond to the direction of rotation provided for control (display 42) and the running time speaks from the start. Between the lamps 36 and 37 there are three control switches until the first limit switch responds (display 43).

lamps 38, 39 and 40 to indicate the voltage with the pha 20 With these two times the limit switches for sen R, S and T of the three-phase current mentioned. The control, feedback and bridging are now set,

Control lamps 38, 39 and 40 clearly show the ampere- and depending on the type of control, for example in up-

tern 33,34 and 35 assigned. Direction a limit switch and in the closed direction a

In addition to the ammeter 33 there are digital displays 42 and tere limit switches.

43 are provided, with which the times of valve actuation 25 must be observed:

are reproduced. The display 42 provides the type of control 1 that is used with the pressure switch 64

valve actuation time, while the time display 43 is selected for the running time of the row 45, torque switches switch off.

the limit switch is provided. These switches speak in the open direction and in the closed direction

In addition to the time displays 42, 43 are in two rows 45 and on the increase in the torque of the valve spindle 2 at

46 two pressure switches arranged one above the other. 30 Place the valve plate on the valve housing or on the

Of these, the pressure switches of the upper row 45 serve for the valve seat.

Selection of the type of control that is to be checked in the case of control type 2 (pressure switch 65)

Actuator. The individual types will later be controlled via limit switches. Explained for protective overlay. The switches in the lower row 46 are used for simulating torque switches.

lation of various malfunctions when testing the actuator, 35 In the type of control 3 (pressure switch 66), which is also carried out later, and further include a control in the up direction of a limit switch NEN switch 47 for motor protection. and in the closed direction from a torque switch. The

A circuit diagram is also provided on the front plate 16.

hen, which is designated as a whole by 50. As part of this switch.

Circuit diagram 50, an interchangeable circuit board 51 is arranged, 40. For the types of control 4, 5 and 7, the pressure, which is fixed with retaining clips 52. The circuit board 51 can provide switches 67, 68 and 70 of the test device 15. According to the work program of the actuator to be tested, a limit switch in the open direction and in the closed direction drive has to be replaced, which does not see from an electronic direction and for the bridging to the intermediate position in the accumulator for a housing accommodated in the housing 14. In this case, the Abbaren control section is recalled in the type of control 4 and is set and activated with the switches 45 in 45 control in the up direction via a torque switch. It is therefore for and in the closed direction via a limit switch. The rotationally different applications are the right ones, i.e. Torque bridging to the intermediate position in the up direction corresponds to the circuit diagram on the motor control using the further travel limit switch mentioned above. Front plate 16 available. In the course of this circuit diagram 50, the protective overlay in the closed direction is carried out with the light-emitting diodes 54. They denote the coupling points, which are the torque switches.

are produced and light up with plugs 26 to 29 In the case of control type 5, the control takes place in open position when the coupling points are inserted by inserting the connector pins in the direction of a torque switch and in the

are closed. The control section is made of power lines via a torque switch. The torque transfer

shielded in the housing in such a way that there is no risk of interference in the electrical bridging to the intermediate position in the up direction with tronik. 55 a limit switch.

On the front plate 16, further actuators are provided in the form of the switch-off in the type of switch 7 in the diagram. This direction via a limit switch and in the closed direction includes an emergency stop switch 55, which clearly shows in the form of a torque switch. The bypass on the red push button protrudes. A further position in the up direction is carried out with a limit switch 56 which enables the switch to jog mode. The «so switch. The protective overlay in the up direction via motor 7 of the actuator 3 is then only taken into account by a further torque switch.

The voltage is applied according to the duration of the switch actuation. For the type of control 6, which is selected with the pressure switch 69 and that this jog mode refers to the two, switches 57 and 58 work in the open direction and in the closed direction , one for each actuation of the actuating limit switch. For bridging to the intermediate drive in the “open” direction or in the “closed” direction of the Ven 65 position in the open direction and in the closed direction, tils 1 must also be pressed. The one with limit switches 57 and 58 each provided a limit switch. If there is no jog mode, the cut-off with a torque switch and is present, the protective overlay can be interrupted at any time with a stop button 60.

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Counter. The shutdown is also carried out in the closed direction. For a shutdown with the protective torque,

with a torque switch and the protective overlay that the respective

with another torque switch. direction limit switch, for the closed direction by a button 74

With various types of control, only the times of the limit switches are shown on the time and for the up direction by a button 75 of the switch display 48. 5 row 46 disabled. When the protective

The fault message is then pending in the case of control types 4, 5 and 7.

a feedback limit switch and with the type 6 control, with the type 6 control, the normal torque,

The two feedback limit switches for the open and closed direction, namely for the closed direction by a key 76, for the direction to be measured or set, are consequently inactive in the open direction by a key 77, so that for the drive: io control the superimposed protective torque

The valve is admitted with the appropriate valve.

Type of control is started, but then immediately during the run. For an overvoltage and undervoltage test, the control mode 1 is switched over. The runtime can then be read from the power supply of the device with 110% of the nominal voltage on the time display 48. supplied (for example with variable transformer). With these armatures, which are normally of the 15 priority construction, the armature is moved into the end position and grappe, ie an automatic control device, is controlled by the torque switch. The removal and working according to the control types 2 and 4, ren from this end position, the limit switch must be set with 80% of the nominal voltage so that it is taken in the closed direction. If this does not succeed, the under-chip drive can be deactivated after the bridging end formwork has been increased step by step (5% each) and the entire process has been addressed. To do this, a key 72 must be pressed again. The result of this is whether the valve incorrectly operated switch row 46. In order to measure the running time of the end-of-travel, or whether another motor is to be attached to the actuator, the button 73 is also the same switch. During the test work, the same current consumption of the series must be actuated. respected three phases and with repeat exams

After the switch 56 has been actuated, the original protocol should be compared for adjustment. A different operating mode, jog mode, can preferably be used to close the current switch to the desired switching point of the motor to be connected to the short circuit or ground fault, while permitting a limit switch that sets the current consumption too high. Thereafter, the valve may be stiff.

the exact adjustment can be made when the machine is at a standstill. By standardizing plugs and connections

Since the runtime is restarted with each switching process, or by using test adapters for GaU

may only be switched once. The torque switch 30 fixed fittings is the time required for functional test

are already set by the actuator manufacturer. or repeat tests very low. For exams

During the functional test, only a 380 V

errors can also be simulated. in the end.

C.

1 sheet of drawings