A memory type valve positioner and a valve

Abstract

The present invention belongs to the technical field of feedback devices and relates to a memory type valve feedback device and a valve. The memory type valve feedback device includes a housing, an actuator disposed on the housing, and at least one induction switch disposed on the housing around the actuator; wherein, a trigger member is provided on the side wall of the actuator for triggering the induction switch; the perpendicular connection line from the trigger member to the axis of the actuator forms a certain angle with the output direction of the actuator, and the angle includes 1-60°. The present invention controls the opening and closing of the valve through the trigger member and the trigger switch, so that the movement state of the valve can be stably and continuously directed. At the same time, the present invention is provided with an indicator light and an indication mark, which is convenient for checking the opening and closing states of the actuator and the valve; in addition, the present invention can extend the service life of the feedback device, can replace components therein separately, and reduce costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of positioners and relates to a memory type valve positioner and a valve. Background Art

[0002] Traditional positioners use contact type micro switches to generate signals by contact. When the elastic metal sheet of the micro switch is used for too long, it is easy to deform and fatigue without signals. Therefore, contact type micro switches often have a short service life and are difficult to maintain. When there is a fault in a part of a traditional positioner, the entire positioner can only be replaced; moreover, the contact type micro switch is point-to-point contact, with a small detection range and incomplete signal feedback. Summary of the Invention

[0003] The purpose of the present invention is to provide a memory type valve positioner and a valve for the deficiencies of the prior art, so as to extend the service life of the positioner.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A memory type valve positioner includes a housing,

[0006] An actuator is provided on the housing; and

[0007] At least one induction switch is provided on the housing around the actuator;

[0008] Wherein, a trigger is provided on the side wall of the actuator for triggering the induction switch.

[0009] Further, the perpendicular connection line from the trigger to the axis of the actuator intersects with the output direction of the actuator.

[0010] Further, the perpendicular connection line from the trigger to the axis of the actuator forms a certain angle with the output direction of the actuator, and the angle includes 1 - 60°.

[0011] Further, the memory type valve positioner includes two induction switches, and the states of the two induction switches are opposite.

[0012] Further, one end of the actuator includes a connecting shaft, and the connecting shaft extends out of the housing.

[0013] Further, the output direction of the connecting shaft forms a certain angle with the perpendicular connection line from the trigger to the axis of the actuator, and the angle includes 1 - 60°.

[0014] Further, the memory type valve positioner further includes a bearing, the inner wall of the bearing is fixedly installed with the actuator, and the outer wall of the bearing is fixedly installed with the housing.

[0015] Further, a bearing cover is provided at one end of the bearing away from the actuator, and the bearing cover is coaxially arranged with the bearing.

[0016] Further, an indication mark is provided on the bearing cover.

[0017] In addition, a switch memory type valve includes a valve body; and

[0018] The memory type valve positioner described in any one of the above, and the memory type valve positioner is arranged on the valve body.

[0019] Advantages of the present invention:

[0020] In the present invention, through the cooperation of the triggering member and the induction switch, the switch state of the induction switch can be maintained for a period of time, so that the movement state of the valve can be stably and continuously directed; at the same time, the triggering member and the induction switch of the present invention are non-contact type, avoiding fatigue of the trigger switch and prolonging the service life of the positioner; the present invention is provided with multiple groups of trigger switches, and there are trigger switches with opposite states, so that the on-off states of the valve and the actuator can be judged according to the indicator lights on the trigger switches; in addition, an indication mark is also provided on the bearing cover of the present invention, and the on-off states of the corresponding valve and actuator can also be observed and judged through the indication mark; each component of the present invention can adopt a detachable connection, so when there is a component failure in the memory type valve positioner, the corresponding component can be replaced separately, without replacing the entire memory type valve positioner, thus saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 is a schematic internal structure diagram of the memory type positioner;

[0022] Attached Figure 2 is a side view schematic diagram of the internal structure of the memory type positioner;

[0023] Attached Figure 3 is a schematic structure diagram of the memory type positioner;

[0024] Attached Figure 4 is a side view structure schematic diagram of the memory type positioner;

[0025] Attached Figure 5 is a schematic bottom structure diagram of the memory type positioner;

[0026] Attached Figure 6 is a schematic diagram of the projection relationship of the actuator, the triggering member and the induction switch on the horizontal plane in the initial state;

[0027] Attached Figure 7 is a schematic diagram of the projection relationship of the actuator, the triggering member and the induction switch on the horizontal plane in the operating state.

[0028] Identifications in the figure: 1 - bearing cover, 101 - indication identification, 201 - mounting plate, 202 - bracket, 3 - snap ring, 4 - bearing, 5 - trigger, 6 - inductive switch, 7 - indicator light, 8 - connecting shaft, 9 - housing, 901 - upper cover, 902 - lower cover, 10 - connecting wire, 11 - nut, 12 - actuator. Detailed implementation manners

[0029] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0032] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "mount", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The valve position indicator, also known as the valve position feedback device, is a field instrument for automatic valve position and signal feedback. It is used to detect and monitor the movement position of the piston inside cylinder-type valves or other cylinder-type actuators. It has the characteristics of a compact structure, reliable quality, and stable output performance, and is widely used. The valve position indicator can be installed on on-off valves such as angle valves, diaphragm valves, and butterfly valves to output the valve state in the form of a switch signal, which can be easily connected to the on-site PLC or DCS system to achieve remote feedback of the valve on-off state.

[0034] Valve position indicators can generally be divided into contact type and non-contact type. Most contact type indicators are composed of mechanical limit switches. Due to the existence of mechanical contact parts, sparks are likely to be generated, so an explosion-proof housing needs to be installed when used in explosion-proof occasions, which is very bulky. If the valve operates frequently, the accuracy and service life of the indicator will both decline. Non-contact indicators generally use NAMUR proximity switches. Although they overcome the disadvantages of contact type indicators, they need to be connected with a safety barrier when used in explosion-proof occasions, resulting in a higher cost.

[0035] Refer to the appendix Figures 1 to 5 As shown, in the embodiment, a memory type indicator is provided, including a housing 9; an actuator 12 provided on the housing 9; and at least one inductive switch 6, the inductive switch 6 being provided around the actuator 12 on the housing 9; wherein, a trigger member 5 is provided on the side wall of the actuator 12 for triggering the inductive switch 6.

[0036] In the embodiment, one end of the actuator 12 where the trigger member 5 is installed is inside the housing 9, and the other end is rotatably connected to the housing 9, that is, the actuator 12 can rotate relative to the housing 9. The trigger switch 6 is fixedly installed on the side wall of the housing 9; further, when the actuator 12 rotates, it can drive the trigger member 5 to pass by the trigger switch 6, so that the trigger member 5 triggers the trigger switch 6 to issue a trigger signal, thereby controlling the opening and closing of the valve.

[0037] In some embodiments, the housing 9 includes an upper cover 901 and a lower cover 902; the upper cover 901 is detachably connected to the open end of the lower cover 902 to form a cavity. In some embodiments, the upper cover 901 can also be fixed to the open end of the lower cover 902 by detachable connection methods including but not limited to screw connection, snap connection, and threaded connection. Of course, in some embodiments, the upper cover 901 can also be connected by non-detachable connection methods such as welding.

[0038] Refer to the appendix Figure 3 and Figure 4As shown, in some embodiments, the memory type valve positioner further includes a bearing 4. The inner wall of the bearing 4 is fixedly installed with the actuator 12, and the outer wall of the bearing 4 is fixedly installed with the housing 9. In the embodiment, one end of the actuator 12 is connected to the upper cover 901 through the bearing 4, and the bearing 4 is locked on the upper cover 901 by a snap ring 3, so as to achieve smooth rotation between the actuator 12 and the upper cover 901.

[0039] In some embodiments, one end of the actuator 12 located inside the housing 9 is provided with a trigger member 5. The trigger member 5 is fixedly installed on the side wall of the actuator 12. A trigger switch 6 is fixedly installed on the side wall of the housing 9. The trigger member 5 and the trigger switch 6 are arranged at the same height. During the rotation of the trigger member 5, the trigger switch 6 is triggered to generate a trigger signal.

[0040] Reference appendix Figures 1 to 3 As shown, in some embodiments, two trigger members 5 are symmetrically arranged at one end of the actuator 12 located inside the housing 9. The trigger members 5 are fixedly installed on the side wall of the actuator 12. Two trigger switches 6 are symmetrically arranged on the side wall of the housing 9. The trigger members 5 and the trigger switches 6 are arranged at the same height. The trigger switches 6 and the trigger members 5 are correspondingly arranged, that is, one trigger member 5 corresponds to one trigger switch 6. The states of the two induction switches 6 are opposite.

[0041] Of course, in some embodiments, the trigger switch 6 and the trigger member 5 can also be set to other numbers of groups such as three groups, four groups, etc. according to needs to meet the actual control needs of the valve.

[0042] In some embodiments, the trigger switch 6 is fixedly installed on the lower cover 902 of the housing through a nut 11. In some embodiments, the trigger switch 6 can also be fixed on the lower cover 901 by connection methods including but not limited to welding, threaded connection, interference fit, etc.

[0043] Reference appendix Figure 6 and Figure 7 As shown, in the embodiment, the vertical connection line L1 from the trigger member 5 to the axis of the actuator 12 intersects with the output direction L2 of the actuator 12. The vertical connection line from the trigger member to the axis of the actuator forms a certain angle with the output direction of the actuator, and the angle includes 1 - 60°. In the embodiment, one end of the actuator 12 includes a connecting shaft 8. The connecting shaft 8 extends out of the housing 9. The output direction of the connecting shaft 8 forms a certain angle with the vertical connection line from the trigger member 5 to the axis of the actuator 12, and the angle includes 1 - 60°.

[0044] In some embodiments, a connecting shaft 8 is fixedly connected to one end of the actuator 12 away from the bearing 4, and the connecting shaft 8 rotates synchronously with the actuator 12; the connecting shaft 8 is coaxially arranged with the actuator 12; the connecting shaft 8 passes through the housing 9 for connecting to a valve, and the connection direction L2 of the connecting shaft 8 to the valve, that is, the output direction of the connecting shaft 8, is also the output direction of the actuator 12. Specifically, in some embodiments, the included angle between the output direction L2 of the connecting shaft 8 and the perpendicular connecting line L1 from the trigger member 5 to the axis of the actuator 12 is 30°; the connecting shaft 8 is connected to the valve. When driving the valve to act, the trigger member 5 reaches the trigger switch 6 30° in advance, so that the trigger switch 6 detects the corresponding signal to control the valve to open or close and can be maintained for a period of time.

[0045] In some embodiments, the included angle between the output direction L2 of the connecting shaft 8 and the perpendicular connecting line L1 from the trigger member 5 to the axis of the actuator 12 can also be set to other arbitrary angles in the range of 1° - 60° such as 1°, 10°, 35°, 60°, etc. to meet the actual required maintenance time of the valve state.

[0046] In some embodiments, the trigger switch 6 is a magnetic memory switch; correspondingly, the trigger member 5 is a magnet; when the trigger member 5 passes by the trigger switch 6, the trigger switch 6 detects the magnetic field signal and changes its output signal; the output signal of the trigger switch 6 will be maintained for a period of time until the trigger member 5 passes by the trigger switch 6 in the reverse direction. When the trigger switch detects the reverse magnetic field, the output signal of the trigger switch 6 is reset.

[0047] In some embodiments, one trigger switch 6 includes two juxtaposed photoresistors with different parameters; the trigger member 5 includes a laser generator; when the laser generator rotates, it will sequentially pass by the two photoresistors; when the laser irradiates on different photoresistors in sequence, the trigger switch 6 will output two different electrical signals, and different actions of the valve are controlled according to the signal sequence of receiving the two different signals successively.

[0048] In some other embodiments, other non-contact trigger components can also be selected for the trigger switch 6 and the trigger member 5.

[0049] Refer to the attached Figures 1 to 2 As shown, in some embodiments, an indicator light 7 is provided at one end of the trigger switch 6 away from the actuator 12; the indicator light 7 is outside the housing 9, so as to facilitate the user to view the state of the trigger switch 6.

[0050] Refer to the attached Figure 1 and Figure 2As shown, in some embodiments, one end of the bearing 4 away from the connecting shaft 8 is connected with a bearing cover 1. The bearing cover 1 is fixedly connected to the bearing 4, and the bearing cover 1 and the bearing 4 are coaxially arranged. Thus, the bearing cover 1 rotates synchronously with the bearing 4. In some embodiments, the bearing cover 1 is fixedly connected to the bearing 4 by screws. In some embodiments, the bearing cover 1 can also be fixedly connected to the bearing 4 by connection methods including but not limited to snap connection, welding, threaded connection, bonding, etc.

[0051] Refer to the appendix Figure 1 As shown, in some embodiments, an indication mark 101 is provided on one side of the bearing cover 1 away from the bearing 4.

[0052] Refer to the appendix Figure 5 and Figure 6 As shown, in some embodiments, a mounting plate 201 is further connected to the housing 9, so that the memory type feedback device can be fixed to the corresponding equipment. In some embodiments, one end of the mounting plate 201 away from the housing 9 is connected with a bracket 202. The mounting plate 201 and the bracket 202 are connected by bolts and nuts, and the height is adjustable, so that the memory type valve feedback device can adjust the height according to the needs of the valve.

[0053] During use, the memory type feedback device can be connected to devices such as a computer and a server through the wire 10 of the trigger switch 6, so as to send the detection signal to the corresponding device for indication by the device. The connecting shaft 8 on the actuator 12 is connected to the valve. During installation, the connection direction between the actuator 12 and the valve forms a certain angle with the perpendicular connection line from the trigger 5 to the axis of the actuator 12. When the actuator 12 drives the valve to open or close, the trigger 5 will always pass through the trigger switch 6 at a certain angle in advance. When the trigger switch 6 detects that the trigger 5 passes by, it will change its output signal, and at the same time, it will also keep the valve in the same state after the trigger 5 leaves. When the trigger 5 moves reversely to the trigger switch 6, the output signal of the trigger switch 6 is reset. The trigger switch 6 can identify the movement direction of the trigger 5 and can be selected according to the needs during specific use.

[0054] Specifically, for example, the trigger switch 6 is selected as a magnetic memory switch, and the trigger member 5 is selected as a magnet; during a complete valve opening process, the actuator 12 rotates 90°, and the magnet on the actuator 12 passes through the detection range of the magnetic memory switch 30° in advance to change the output signal of the magnetic memory switch. After the magnet leaves the detection range of the magnetic memory switch 6, the magnetic memory switch can still maintain this state after changing the output signal, so that the movement state of the actuator 12 can be stably and continuously directed, and the valve remains in the open state. When the actuator 12 moves in the reverse direction, it drives the magnet to rotate in the opposite direction and passes through the magnetic memory switch again. The output signal of the magnetic memory switch is reset and indicates the current action state of the actuator in the server. The memory type positioner uses two magnetic memory switches, and the states of the two magnetic memory switches are always opposite. The indicator lights on the two magnetic memory switches can be used to determine whether the valve and the actuator are in the open state or the closed state, and accurately reflect the state in the case of valve jamming.

[0055] The bearing cover 1 of the present invention is provided with an indication mark 101, and one end of the trigger switch 6 is provided with an indicator light 7, so that the on-site can directly observe the switch states of the actuator and the valve. At the same time, each component of the memory type valve positioner can be independently installed and replaced. When the memory type positioner fails, the problematic components can be freely replaced to make it work properly.

[0056] In addition, the present invention also provides a switch memory type valve, including a valve body and the memory type valve positioner described in any one of the above. The memory type valve positioner is arranged on the valve body. In the embodiment, the connecting shaft 8 of the memory type valve positioner is connected to the valve; thus, when the actuator drives the trigger member 5 to rotate, the trigger switch 6 can send a signal to the corresponding server to control the opening and closing of the valve and can control the opening and closing state of the valve to be maintained for a certain period of time.

[0057] The above embodiments are only one of the more preferred specific ways of the present invention. The general changes and substitutions made by technicians in the field within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A memory type valve position indicator, characterized in that, including a housing, an actuator disposed on the housing; and at least one inductive switch disposed around the actuator on the housing; wherein a triggering member is provided on the side wall of the actuator for triggering the inductive switch; the inductive switches are symmetrically disposed on the housing, the triggering member is symmetrically disposed on the side wall of the actuator centered on the central axis of the actuator, and the states of the two inductive switches are opposite, and the inductive switches are correspondingly arranged with the triggering member; one end of the actuator includes a connecting shaft extending out of the housing; the perpendicular connection line L1 from the triggering member to the axis of the actuator intersects with the setting direction L2 of the connecting shaft of the actuator; the perpendicular connection line from the triggering member to the axis of the actuator forms a certain angle with the setting direction of the connecting shaft of the actuator, and the angle includes 1-60°; 2. The memory type valve position indicator according to claim 1, wherein the memory type valve positioner further includes a bearing, the inner wall of the bearing is fixedly installed with the actuator, and the outer wall of the bearing is fixedly installed with the housing; 3. The memory type valve positioner according to claim 2, wherein, a bearing cover is provided at one end of the bearing away from the actuator, and the bearing cover is coaxially arranged with the bearing; 4. The memory type valve position indicator according to claim 3, characterized in that, an indication mark is provided on the bearing cover; 5. A switch memory type valve, characterized in that, including a valve body; and the memory type valve positioner according to any one of claims 1 to 4, the memory type valve positioner is disposed on the valve body.

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