RU222019U1 - End position indicator (UKP-03) - Google Patents

Abstract

The utility model relates to end position indicators with a switch with magnetically controlled changeover contacts. The indicator contains a stand to which the housing and cover are attached, a shaft passes through the housing and cover, a magnetic system is rigidly fixed on the shaft, in which the first and second permanent magnets are located, a terminal block is fixed in the housing, in which the first and second reed switches are installed, each reed switch has three contacts, and the pointer is configured to be attached to the shut-off element in such a way that in the intermediate position of the shut-off element, the magnetic system is in the initial position between the first and second reed switches, while the first and second contacts of the first and second reed switches are closed, while the signaling circuits are closed about the established intermediate position of the locking element, and the magnets are fixed in the magnetic system, and the magnetic system is located relative to the reed switches in such a way that when the shaft rotates counterclockwise, the magnetic system rotates from its original position to a position in which the first permanent magnet in the magnetic system is in position under the first reed switch, in this case the signaling circuit about the established intermediate position of the shut-off element opens and the signaling circuit about the established position of the shut-off element OPEN is closed; when the shaft rotates clockwise from the position of the shut-off element OPEN, the magnetic system returns to its original position, the alarm circuit opens the steady position of the shut-off element is OPEN and the signaling circuit is closed about the established intermediate position of the shut-off element; when the shaft rotates clockwise, the magnetic system rotates from its original position to a position in which the second magnet of the magnetic system is in a position under the second reed switch, and the signaling circuit opens about the established intermediate position of the shut-off element and the closure of the signaling circuit about the established position of the shut-off element CLOSED, and the angle of rotation of the shaft when turning the shut-off element from the position OPEN to the CLOSED position and the angle of rotation of the shaft when turning the shut-off element from the position CLOSED to the OPEN position is no more than 90° without taking into account measurement error. The technical result of the claimed utility model is the expansion of the arsenal of means of indicators of the final position of the shut-off element for discrete electrical signaling of the extreme positions of the shut-off element, where it is necessary to register the extreme positions of the moving parts of the shut-off element with a rotation angle of no more than 90° without taking into account the measurement error. 3 salary f-ly, 5 ill.

Description

TECHNICAL FIELD

The utility model relates to end position indicators of a shut-off element, namely end position indicators with a switch with magnetically controlled changeover contacts. The end position indicator (UKP-03) with a switch with magnetically controlled changeover contacts is designed for discrete electrical signaling of the extreme positions of the shut-off element, where it is necessary to register the extreme positions of the moving parts of the shut-off element with a rotation angle of no more than 90° without taking into account measurement error and can be used in various industrial applications units and structures.

BACKGROUND OF THE ART

A known indicator for the end positions of a locking body (RU 2098708 C1, F16K 37/00, publication date 12/10/1997). The invention relates to pipeline fittings, more specifically, to indicators for the end positions of a shut-off valve. The essence of the invention: the signaling device contains a non-magnetic hollow body in which a rod is placed, connected to a shut-off element and carrying a permanent control magnet. The signaling device also includes an electric limit position indicator, made in the form of reed switches located around the housing axisymmetrically to the latter. In the area of the blind end of the hollow body, a hollow compartment made of non-magnetic material is installed on the same axis with it. An auxiliary permanent magnet is located in the compartment with the possibility of axial movement. Moreover, both magnets face each other with the same poles. On the opposite side, the auxiliary permanent magnet is equipped with a signal rod with a return spring, installed with the ability to extend beyond the compartment.

A known indicator of the final position of the locking body (EP 1985902 A1, F16K 37/00, 10/29/2008). An end position indicator mounted on the valve body defines a chamber housing a piston assembly that can be moved to various positions spaced along an axis extending forward and aft to indicate the position of the piston assembly along the axis. The end position indicator includes a frame defining a cavity, a plunger movably mounted on the frame, and a spring pushing the plunger forward along an axis. A plurality of switches are mounted in the cavity, and a switch operator in the form of a slide connected to and moving with the rear end of the plunger operates the various switches as the plunger moves back and forth along the axis. The valve body has an openable rear portion on which an indicator frame is mounted, and the front end of the plunger extends forward from the frame into the body chamber and abuts the rear end of the piston assembly in the body.

An indicator of the final position of the locking body is known (US 11255462 B2, F16K 3/02; F16K 37/00; F16K 31/528, 02.22.2022). The valve position indicator includes an outer body, an actuator rod, an indicator flag and a follower. The rod is located in the outer housing, which is connected to the valve stem protection. The rod may have a spiral groove. The rod may be rotationally connected to the outer housing. The indicator flag may be connected to the actuator rod and may extend therefrom in a radial direction. The follower may be connected to the valve stem. The follower element may protrude in a direction perpendicular to the extension of the tail rod. When the valve position indicator is connected to the tail rod guard, it can pass through a groove in the tail rod guard and fit into the helical groove of the actuator rod.

The closest analogue is the stop valve end position indicator, disclosed in patent CN 216768538 U, F16K 37/00, publication date 06/17/2022. The valve position remote transmission device is composed of an installation part, an extension rod, a guide rod and a sensing structure assembly, the inside of the installation part is hollow, the bottom of the installation part is connected to the connecting seat of the gate valve, and the extension rod is located in the installation part and connected by a shaft to the gate pusher in the shut-off valve; the guide rod enters the mounting part on one side of the mounting part, the front end of the guide rod is in transmission connection with the extension rod, the guide rod can move in a predetermined range, the sensing structure assembly is located at the rear end of the guide rod, and the sensing structure assembly receives the guide moving signal rod and transmits the movement signal to the control center at the far end. The mounting part is installed on the connecting seat of the gate valve, the extension connecting rod is connected to the gate pusher, and the guide rod is driven within a predetermined distance, so that the sensing structure assembly receives the electrical signal of the movement of the guide rod and transmits the electrical signal to the remote control center, and then the position status of the shut-off valves is uploaded to the operations center in real time; relevant personnel can conveniently manage the status of the shut-off valve and maintain the shut-off valve in a timely manner. and the guide rod is driven within a predetermined distance, so that the sensing structure assembly receives the electrical signal of the movement of the guide rod and transmits the electrical signal to the remote control center, and then the valve position status of the check valve is downloaded to the operation center in real time; relevant personnel can conveniently manage the status of the shut-off valve and maintain the shut-off valve in a timely manner.

However, the state of the art does not disclose an end position indicator with a switch with magnetically controlled changeover contacts for discrete electrical signaling of the extreme positions of the shut-off element, where it is necessary to register the extreme positions of the moving parts of the shut-off element with a rotation angle of no more than 90° without taking into account the measurement error.

The technical problem to be solved by the claimed utility model is the development of an end position indicator with a switch with magnetically controlled changeover contacts for discrete electrical signaling of the extreme positions of a shut-off element, where it is necessary to register the extreme positions of the moving parts of the shut-off element with a rotation angle of no more than 90° without taking into account the error measurements.

UTILITY MODEL DISCLOSURE

The technical result is the expansion of the arsenal of indicators for the final position of the shut-off element to provide effective discrete electrical signaling of the extreme positions of the shut-off element, where it is necessary to register the extreme positions of the moving parts of the shut-off element with a rotation angle of no more than 90° without taking into account the measurement error.

The technical result is achieved in that the end position indicator with a switch with magnetically controlled changeover contacts contains a stand to which the housing and the cover are attached, a shaft passes through the housing and the cover, a magnetic system is rigidly fixed on the shaft, in which the first and second permanent magnets are located, in the housing a terminal block is fixed in which the first and second reed switches are installed, each reed switch has three contacts,

the indicator is designed to be attached to the shut-off element in such a way that in the intermediate position of the shut-off element the magnetic system is in the initial position between the first and second reed switches, while the first and second contacts of the first and second reed switches are closed, while the signaling circuits about the established intermediate position are closed constipation organ

wherein the magnets are fixed in the magnetic system, and the magnetic system is located relative to the reed switches in such a way that when the shaft rotates counterclockwise, the magnetic system rotates from its original position to a position in which the first permanent magnet in the magnetic system is in a position under the first reed switch, and this occurs opening the first and second contacts of the first reed switch, opening the signaling circuit about the established intermediate position of the shut-off element, closing the first and third contacts of the first reed switch and closing the signaling circuit about the established position of the shut-off element OPEN,

when the shaft rotates clockwise from the shut-off valve OPEN position, the magnetic system returns to its original position, the first and third contacts of the first reed switch open, the signaling circuit about the steady state of the shut-off body OPEN opens, the first and second contacts of the first reed switch close and the signaling circuit about the steady state closes intermediate position of the locking organ,

then, when the shaft rotates clockwise, the magnetic system rotates from its original position to a position in which the second magnet of the magnetic system is in a position under the second reed switch, in which case the first and second contacts of the second reed switch are opened and the signaling circuit about the established intermediate position of the shut-off element is opened, closing the first and third contacts of the second reed switch and closing the signaling circuit about the steady position of the shut-off element CLOSED, and the angle of rotation of the shaft when turning the shut-off element from the OPEN position to the CLOSED position and the angle of rotation of the shaft when turning the shut-off element from the CLOSED position to the OPEN position is no more than 90° excluding measurement error.

The advantages of this design include the provision of effective discrete electrical signaling of the extreme positions of the shut-off element, where it is necessary to register the extreme positions of the moving parts of the shut-off element with a rotation angle of no more than 90° without taking into account the measurement error.

The pointer contains an arrow rigidly fixed to the shaft, which indicates the position of the shut-off element on the cover.

The indicator contains internal and external grounding devices, dielectric elements in the lower part of the shaft that separate the indicator from the shut-off element, rubber sealing rings at the junction of the housing with the cover and the cover with the shaft.

Electrical parts of the indicator that can ignite an explosive mixture are enclosed in an explosion-proof enclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The implementation of the utility model will be described further in accordance with the attached drawings, which are presented to explain the essence of this technical solution and in no way limit the scope of the utility model.

The claimed utility model is illustrated in figures 1-5:

Fig. 1 - illustrates the general view, placement and installation of a crane end position indicator with a switch with magnetically controlled changeover contacts.

Fig. 2 - illustrates view A of the general view, placement and installation of a crane end position indicator with a switch with magnetically controlled changeover contacts.

Fig. 3 - illustrates view B of the general view, placement and installation of a crane end position indicator with a switch with magnetically controlled changeover contacts.

Fig. 4 - illustrates view B of the general view, placement and installation of a crane end position indicator with a switch with magnetically controlled changeover contacts.

Fig. 5 illustrates a circuit diagram of a crane end position indicator with a switch with magnetically controlled changeover contacts.

IMPLEMENTATION OF THE UTILITY MODEL

The indicator (UKP-03) is intended for discrete electrical signaling of the extreme positions of the shut-off valve of DN taps from 150 mm to 1400 mm.

In FIG. 1, 2 shows a general view, placement and installation of the valve end position indicator and view A (cover shown, cover not shown). The valve end position indicator with a switch with magnetically controlled changeover contacts contains: a stand (9) to which a cast body (3) and a cover (5) are attached, a shaft (8) passes through the cover (5) and the body (3); The magnetic system (4) and the pointer (7) are rigidly fixed on the shaft; in the lower part of the shaft (8) and the stand (9) there are dielectric elements that electrically separate the pointer from the shut-off element. The housing (3) contains a terminal block (6), in which two magnetically controlled sealed changeover contacts (reed switches) MKS 27103 B are installed, a hermetically sealed cable entry (1) is installed, and internal and external grounding devices are provided. The indicator is not a measuring instrument, but has precision characteristics with magnetically controlled sealed changeover contacts MKS 27103 B. The indicator is attached to the tap using a set of mounting parts (2).

In FIG. 3, 4 show views B and C of the general view, placement and installation of the crane end position indicator.

In FIG. Figure 5 shows a schematic electrical diagram of a crane end position indicator with a switch with magnetically controlled changeover contacts. The valve end position indicator contains a switch with magnetically controlled sealed changeover contacts (reed switches) (SQ1) and (SQ2). A magnetic system (4) is rigidly fixed to the shaft (8), in which permanent magnets (N1) and (N2) are located. In the intermediate position of the shut-off element, the magnetic system (4) is in the initial position between the first (SQ1) and second (SQ2) reed switches, while contacts “1” and “2” of each reed switch are closed, and the signaling circuits “2”-“3” are closed " and "4" - "5" about the established intermediate position of the shut-off organ. When the valve is in OPEN position, a permanent magnet (N1) located in the magnetic system (4) is located under the reed switch (SQ1). In FIG. Figure 5 shows the relative position of the magnets (N1) and (N2), fixed in the magnetic system (4), and the reed switches (SQ1) and (SQ2) in the initial position of the pointer and, accordingly, in the intermediate position of the shut-off element. When the valve is in CLOSED position, a permanent magnet (N2) located in the magnetic system (4) is located under the reed switch (SQ2). In this case, the angle of rotation of the shaft (8) when turning the valve from the OPEN position to the CLOSED position and the angle of rotation of the shaft (8) when turning the valve from the CLOSED position to the OPEN position is no more than 90° without taking into account the measurement error.

The principle of operation of a valve end position indicator with a switch with magnetically controlled changeover contacts is based on alternate switching of two magnetically controlled sealed changeover contacts (reed switches) under the influence of permanent magnets placed in a magnetic system, which is rigidly fixed to the shaft.

When the end position indicator shows the OPEN position and the magnet (N1) is under the reed switch (SQ1), contacts “1” and “3” are closed and the signaling circuit “4” - “6” is closed about the established position of the shut-off element OPEN, and at the reed switch ( SQ2) contacts “1” and “3” are open and circuit “2” - “3” is closed.

When the shaft rotates clockwise, the magnet (N1), fixed in the magnetic system (4), moves away from the reed switch (SQ1), contacts “1” and “3” open and contacts “1” and “2” close, respectively, the circuit “ 4" - "6" and the circuit "4" - "5" is closed. The magnet (N2) fits under the reed switch (SQ2), contacts “1” and “2” open, and contacts “1” and “3” close, respectively, the signaling circuit “1” - “3” about the steady position of the shut-off element CLOSED is closed, and the circuit “2” - “3” opens, a signal about the CLOSED position is sent.

The indicator provides registration of the two extreme positions of the valve shut-off element OPEN and CLOSED in the range of its shaft rotation angle (90 +/- 5)°.

To prevent water from getting inside the faucet end position indicator at the connection points: body (3) with cover (5); housing (3) with shaft (8); covers (5) with shaft (8) are sealed - rubber rings (10), (11) and (12).

Electrical parts of the indicator capable of igniting an explosive mixture are enclosed in an explosion-proof enclosure that can withstand the pressure of the explosion of the ignited mixture without damage or transfer of ignition to the environment. Explosion protection of the crane limit position indicator is provided in accordance with the requirements of regulatory documents on the standardization of production processes and the provision of services. The explosion resistance of the shell is checked during its manufacture by pneumatic testing of its parts (individually or the shell as a whole) with an excess pressure of 1 MPa. Explosion-proof connections of parts of shells, through the cracks of which an explosion inside the shell does not spread into the surrounding explosive mixture, are shown in Fig. 1 (indicated by the word “Explosion”). In FIG. 1 shows the explosion-proof connections of the shell parts as follows: housing (3) and cover (5), housing (3) and shaft (8), cover (5) and shaft (8). After treatment, explosion-proof surfaces should be free of paint, holes, cracks and mechanical damage; they are protected from corrosion by applying lubricant to them. Explosion-proof cable entries are achieved by sealing them with elastic rubber rings and bushings. All screws and nuts, fastening parts with explosion-proof surfaces, the threaded cable entry fitting, as well as current-carrying and grounding clamps are protected from self-loosening by means of spring washers, locknuts or sealant. The heads of the external mounting screws are located in security sockets. The indicator cover has a raised warning inscription OPEN, DISCONNECT FROM THE MAINS, explosion protection marking “1Ex d IIB T4 Gb” and marking of the degree of protection against external influences “IP66”, made by casting. The indicators have internal and external grounding clamps.

The valve limit position indicator is intended for operation in conditions standardized for execution in the combination of temperate and cold macroclimatic regions (UCL) category 1.1 for operation at temperatures from minus 60 to plus 55 ° C and the upper value of relative humidity 98% at a temperature of 25 ° C and lower temperatures without condensation. Outdoor location.

Thus, the claimed utility model makes it possible to provide effective discrete electrical signaling of the extreme positions of the shut-off element, where it is necessary to register the extreme positions of the moving parts of the shut-off element with a rotation angle of no more than 90° without taking into account the measurement error.

The utility model has been disclosed above with reference to a specific embodiment thereof. For specialists, other embodiments of the utility model may be obvious, without changing its essence, as it is disclosed in the present description.

Accordingly, a utility model should be considered limited in scope only by the utility model formula.

Claims (4)

1. An end position indicator with a switch with magnetically controlled changeover contacts, containing a stand to which the housing and cover are attached, a shaft passes through the housing and cover, a magnetic system is rigidly fixed to the shaft, in which the first and second permanent magnets are located, a terminal block is fixed in the housing, in which the first and second reed switches are installed, each reed switch has three contacts, characterized in that the pointer is designed to be attached to the shut-off element in such a way that in the intermediate position of the shut-off body, the magnetic system is in the initial position between the first and second reed switches, while the first and the second contacts of the first and second reed switches are closed, while the signaling circuits about the established intermediate position of the shut-off element are closed, and the magnets are fixed in the magnetic system, and the magnetic system is located relative to the reed switches in such a way that when the shaft rotates counterclockwise, the magnetic system rotates from its original position to a position in which the first permanent magnet in the magnetic system is in a position under the first reed switch, in which case the first and second contacts of the first reed switch are opened, the signaling circuit about the established intermediate position of the shut-off element is opened, the first and third contacts of the first reed switch are closed and the signaling circuit is closed about the established position of the shut-off element OPEN, when the shaft rotates clockwise from the position of the shut-off element OPEN, the magnetic system returns to its original position, the first and third contacts of the first reed switch are opened, the signaling circuit about the established position of the shut-off element OPEN is opened, the first and second contacts of the first are closed reed switch and closing the signaling circuit about the established intermediate position of the shut-off element, then when the shaft rotates clockwise, the magnetic system rotates from its original position to a position in which the second magnet of the magnetic system is in a position under the second reed switch, and the first and second contacts of the second open reed switch and opening the signaling circuit about the established intermediate position of the shut-off element, closing the first and third contacts of the second reed switch and closing the signaling circuit about the established position of the shut-off element CLOSED, and the angle of rotation of the shaft when turning the shut-off element from the OPEN position to the CLOSED position and the angle of rotation of the shaft when turning shut-off valve from position CLOSED to position OPEN no more than 90° without taking into account the measurement error. 2. The indicator according to claim 1, characterized in that it contains an arrow rigidly fixed to the shaft, which indicates on the cover the position of the shut-off element. 3. The indicator according to claim 1, characterized in that it contains internal and external grounding devices, dielectric elements in the lower part of the shaft that separate the indicator from the shut-off element, rubber sealing rings at the junction of the housing with the cover and the cover with the shaft. 4. The indicator according to claim 1, characterized in that the electrical parts of the indicator capable of igniting an explosive mixture are enclosed in an explosion-proof enclosure.