Auxiliary tool for adjusting limit switch of valve

Abstract

The utility model relates to the technical field of valve maintenance equipment, and particularly discloses a valve limit switch adjusting auxiliary tool which comprises a power supply assembly, an opening limit loop, a closing limit loop and a simultaneous triggering loop. The cathode and the other end of the first indicating lamp are respectively connected with two ends of the opening limiter; the positive electrode of the power supply assembly is connected with one end of the second indicating lamp, and the negative electrode of the power supply assembly and the other end of the second indicating lamp are connected with the two ends of the switch-off limiting circuit respectively. A normally-open terminal of a first relay, a normally-open terminal of a second relay, a third indicating lamp and a power supply assembly of the trigger loop are sequentially connected in series, a control connector of the first relay is connected with a first indicating lamp in parallel, and a control connector of the second relay is connected with a second indicating lamp in parallel. According to the auxiliary tool, the positions of the valve and the limiting switch only need to be adjusted on site, operation is easy, and the debugging efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve maintenance equipment, in particular to a valve limit switch adjustment auxiliary tool. Background Art

[0002] Valves are widely used in nuclear islands, conventional islands and auxiliary facilities of nuclear power plants. The operation of almost every system in a power plant is inseparable from valves. Valve open and close limit switches are used as signal devices to indicate whether the valve is in the open or closed state and participate in the shutdown and shutdown control logic of the power plant.

[0003] The adjustment of the limit switch is crucial for the valve. Whether the valve position can be correctly fed back depends on this. When the limit switch is turned on, its internal dynamic and static contacts are closed, the entire circuit forms a loop, and the valve status can be displayed remotely. In the past, the method of adjusting the limit switch required some staff to adjust it at the valve, and the other part of the staff to observe the remote transmission signal remotely, which consumed manpower and material resources. In an environment with poor remote communication, this work could not be performed; another method was to use a multimeter to measure the on-off status of the limit switch on the local side. This method requires the operator to measure repeatedly, which consumes manpower and the result is not intuitive. In addition, for small-stroke valves, there is also the problem of simultaneous triggering of the switch limit. If the open limit and the closed limit are triggered at the same time, the valve status cannot be displayed remotely, and in severe cases, alarms and interlocking equipment will be activated. For this problem, it can only be observed by remotely retrieving the relevant screens and trends of the valve action, which is extremely inconvenient.

[0004] Therefore, there is an urgent need for valve limit switch adjustment auxiliary tools to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a valve limit switch adjustment auxiliary tool to solve the problem of complicated steps, time-consuming and labor-intensive process in the valve limit switch position adjustment process in the related art.

[0006] The utility model provides a valve limit switch adjustment auxiliary tool, the valve limit switch adjustment auxiliary tool comprises:

[0007] Power supply components;

[0008] An open limit circuit includes a first indicator light, a positive terminal of the power supply assembly is connected to one terminal of the first indicator light, and a negative terminal of the power supply assembly and another terminal of the first indicator light are respectively used to connect to two terminals of the open limit;

[0009] A closing limit circuit includes a second indicator light, wherein the positive terminal of the power supply assembly is connected to one terminal of the second indicator light, and the negative terminal of the power supply assembly and the other terminal of the second indicator light are respectively used to connect to two terminals of the closing limit;

[0010] A simultaneous triggering circuit includes a first relay, a second relay and a third indicator light. The normally open terminal of the first relay, the normally open terminal of the second relay, the third indicator light and the power supply component are connected in series in sequence. The control connector of the first relay is connected in parallel with the first indicator light, and the control connector of the second relay is connected in parallel with the second indicator light.

[0011] As an optimal technical solution for the valve limit switch adjustment auxiliary tool, it also includes a timer, which is connected in series to the simultaneous triggering circuit. When the timer is powered on, the timer starts timing, and when the timer is powered off, the timer stops timing.

[0012] As an optimal technical solution for the valve limit switch adjustment auxiliary tool, the power supply assembly includes a first power supply, a second power supply and a third power supply. The first power supply is connected in series to the open limit circuit, the second power supply is connected in series to the closed limit circuit, and the third power supply is connected in series to the simultaneous trigger circuit.

[0013] As a preferred technical solution of the valve limit switch adjustment auxiliary tool, it also includes a housing provided with an installation cavity, and the power supply component, the open limit circuit, the close limit circuit and the simultaneous trigger circuit are all arranged in the installation cavity;

[0014] One side wall of the shell is provided with four mounting holes connected to the mounting cavity, and the first indicator light, the second indicator light, the third indicator light and the timer connected in series to the simultaneous triggering circuit are installed in the four mounting holes one by one.

[0015] As a preferred technical solution of the valve limit switch adjustment auxiliary tool, the other side wall of the housing is provided with a connecting hole connected to the installation cavity;

[0016] It also includes two open limit connecting wires and two closed limit connecting wires, one end of the two open limit connecting wires are extended into the connecting hole and are respectively connected to the negative terminal of the power supply assembly in the installation cavity and the other terminal of the first indicator light, and the other ends of the two open limit connecting wires are located outside the installation cavity and are respectively connected to the two terminals of the open limit; one end of the two closed limit connecting wires are extended into the connecting hole and are respectively connected to the negative terminal of the power supply assembly in the installation cavity and the other terminal of the second indicator light, and the other ends of the two closed limit connecting wires are located outside the installation cavity and are respectively connected to the two terminals of the closed limit.

[0017] As an optimal technical solution for the valve limit switch adjustment auxiliary tool, it also includes two open limit quick connectors and two closed limit quick connectors. The two open limit quick connectors are respectively connected to the other ends of the two open limit connecting lines and are used to connect the two wiring terminals of the open limit; the two closed limit quick connectors are respectively connected to the other ends of the two closed limit connecting lines and are used to connect the two wiring terminals of the closed limit.

[0018] As a preferred technical solution of the valve limit switch adjustment auxiliary tool, the shell is also provided with a heat dissipation hole connected to the installation cavity.

[0019] As an optimal technical solution for the valve limit switch adjustment auxiliary tool, the shell includes a main body and a cover plate, the installation cavity is arranged in the main body, the main body is provided with an opening connected to the installation cavity, and the cover plate is used to close the opening and is detachably connected to the main body.

[0020] As a preferred technical solution of the valve limit switch adjustment auxiliary tool, the shell further includes a handle, and the handle is used to be fixedly connected to the body.

[0021] As a preferred technical solution for the valve limit switch adjustment auxiliary tool, the shell is a hard plastic part.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides a valve limit switch adjustment auxiliary tool, which includes a power supply component, an open limit circuit, a close limit circuit and a simultaneous trigger circuit. The open limit circuit includes a first indicator light, a positive terminal of the power supply component is connected to one terminal of the first indicator light, and a negative terminal of the power supply component and another terminal of the first indicator light are respectively used to connect with two terminals of the open limit; the close limit circuit includes a second indicator light, a positive terminal of the power supply component is connected to one terminal of the second indicator light, and a negative terminal of the power supply component and another terminal of the second indicator light are respectively used to connect with two terminals of the close limit; the simultaneous trigger circuit includes a first relay, a second relay and a third indicator light, a normally open terminal of the first relay, a normally open terminal of the second relay, the third indicator light and the power supply component are connected in series in sequence, a control connector of the first relay is connected in parallel with the first indicator light, and a control connector of the second relay is connected in parallel with the second indicator light. When the auxiliary tool is working, the first step is to check whether the power supply component can work normally; if the power supply component can work normally, the second step is to connect the negative terminal of the power supply component and the other terminal of the first indicator light to the two terminals of the open limit respectively; the negative terminal of the power supply component and the other terminal of the second indicator light are connected to the two terminals of the closed limit respectively; then the third step is to move the valve to the open position, adjust the position of the open limit so that the first indicator light is on, indicating that the open limit has been triggered, and adjust the position of the closed limit so that the second indicator light is off, indicating that the closed limit has not been triggered; the fourth step is to move the valve to the closed position, adjust the closed limit so that the second indicator light is on, indicating that the closed limit has not been triggered. It indicates that the closed limit has been triggered. Adjust the position of the open limit so that the first indicator light is off, indicating that the open limit has not been triggered. The fifth step is to switch the valve between the open position and the closed position. If the open and close limits are triggered at the same time, it means that the first relay and the second relay in the circuit are activated at the same time, and the third indicator light is on. At this time, it is necessary to adjust the interval between the open limit and the closed limit until the third indicator light is off. When each step in the third, fourth and fifth steps is adjusted separately, it may affect the other two steps. Therefore, it is necessary to adjust the third, fourth and fifth steps in a cycle until the positions of the open limit and the closed limit are not adjusted in the third, fourth and fifth steps.

[0024] The valve limit switch adjustment auxiliary tool can adjust the position of the valve and limit switch on site, and the operation is simple and intuitive, which improves the efficiency of debugging and reduces the workload of the debugging personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a circuit diagram of a valve limit switch adjustment auxiliary tool in an embodiment of the utility model;

[0026] Figure 2The structure of the valve limit switch adjustment auxiliary tool in the embodiment of the utility model is shown in FIG. Figure 1 ;

[0027] Figure 3 The structure of the valve limit switch adjustment auxiliary tool in the embodiment of the utility model is shown in FIG. Figure 2 .

[0028] In the figure:

[0029] 11. First power source; 12. Second power source; 13. Third power source;

[0030] 2. Open the limit circuit; 21. The first indicator light;

[0031] 3. Close the limit circuit; 31. Second indicator light;

[0032] 4. Simultaneous triggering circuit; 41. First relay; 42. Second relay; 43. Third indicator light; 44. Timer;

[0033] 5. Shell; 6. Open limit connecting wire; 7. Close limit connecting wire; 8. Open limit quick connector; 9. Close limit quick connector. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] like Figure 1 to Figure 3As shown, the present embodiment provides a valve limit switch adjustment auxiliary tool, which includes a power supply component, an open limit circuit 2, a close limit circuit 3 and a simultaneous trigger circuit 4, the open limit circuit 2 includes a first indicator light 21, the positive terminal of the power supply component is connected to one terminal of the first indicator light 21, and the negative terminal of the power supply component and the other terminal of the first indicator light 21 are respectively used to connect with the two terminals of the open limit; the close limit circuit 3 includes a second indicator light 31, the positive terminal of the power supply component is connected to one terminal of the second indicator light 31, and the negative terminal of the power supply component and the other terminal of the second indicator light 31 are respectively used to connect with the two terminals of the close limit; the simultaneous trigger circuit 4 includes a first relay 41, a second relay 42 and a third indicator light 43, the normally open terminal of the first relay 41, the normally open terminal of the second relay 42, the third indicator light 43 and the power supply component are connected in series in sequence, the control connector of the first relay 41 is connected in parallel with the first indicator light 21, and the control connector of the second relay 42 is connected in parallel with the second indicator light 31. When the auxiliary tool is working, the first step is to check whether the power supply component can work normally; if the power supply component can work normally, the second step is to connect the negative terminal of the power supply component and the other terminal of the first indicator light 21 to the two terminals of the open limit respectively; the negative terminal of the power supply component and the other terminal of the second indicator light 31 are connected to the two terminals of the closed limit respectively; then the third step is to move the valve to the open position, adjust the position of the open limit, so that the first indicator light 21 lights up, indicating that the open limit has been triggered, and adjust the position of the closed limit so that the second indicator light 31 is off, indicating that the closed limit has not been triggered; the fourth step is to move the valve to the closed position, adjust the closed limit, so that the second indicator light 31 lights up, indicating that the closed limit has not been triggered. It indicates that the closed limit has been triggered, and the position of the open limit is adjusted so that the first indicator light 21 is off, indicating that the open limit has not been triggered; the fifth step is to switch the valve between the open position and the closed position. If there is a moment when the open and close limits are triggered at the same time, it means that the first relay 41 and the second relay 42 in the circuit are actuated at the same time, and the third indicator light 43 is on. At this time, it is necessary to adjust the interval between the open limit and the close limit until the third indicator light 43 is off; when each step in the third, fourth and fifth steps is adjusted separately, it may affect the other two steps. Therefore, it is necessary to cyclically adjust the third, fourth and fifth steps until the positions of the open limit and the close limit are not adjusted in the third, fourth and fifth steps.

[0039] The valve limit switch adjustment auxiliary tool can adjust the position of the valve and limit switch on site, and the operation is simple and intuitive, which improves the efficiency of debugging and reduces the workload of the debugging personnel.

[0040] Optionally, the valve limit switch adjustment auxiliary tool also includes a timer 44, which is connected in series to the simultaneous trigger circuit 4. When the timer 44 is powered on, the timer 44 starts timing, and when the timer 44 is powered off, the timer 44 stops timing. In this embodiment, when the valve is switched between the open position and the closed position, if the first relay 41 and the second relay 42 are actuated at the same time and the simultaneous trigger circuit 4 is connected, the timer 44 is powered on and starts timing. When the first relay 41 and / or the second relay 42 are returned to their positions, the simultaneous trigger circuit 4 is disconnected, and the timer 44 is powered off and stops timing. The staff adjusts the spacing between the open limit and the closed limit according to the time when the simultaneous trigger circuit 4 is connected as remembered by the timer 44, which is conducive to the rapid debugging of the staff.

[0041] Optionally, the power supply assembly includes a first power supply 11, a second power supply 12 and a third power supply 13, the first power supply 11 is connected in series to the open limit circuit 2, the second power supply 12 is connected in series to the close limit circuit 3, and the third power supply 13 is connected in series to the simultaneous trigger circuit 4. In this embodiment, the first power supply 11, the second power supply 12 and the third power supply 13 work independently of each other and do not affect each other, so that the fault position of the valve limit switch adjustment auxiliary tool can be quickly found. The first power supply 11, the second power supply 12 and the third power supply 13 all use dry batteries, which is convenient for outdoor use.

[0042] Optionally, the valve limit switch adjustment auxiliary tool also includes a shell 5 provided with an installation cavity, and the power supply assembly, the open limit circuit 2, the close limit circuit 3 and the simultaneous trigger circuit 4 are all arranged in the installation cavity; one side wall of the shell 5 is provided with four installation holes connected to the installation cavity, and the first indicator light 21, the second indicator light 31, the third indicator light 43 and the timer 44 connected in series to the simultaneous trigger circuit 4 are installed in the four installation holes in a one-to-one correspondence. In this embodiment, the shell 5 can protect the power supply assembly, the open limit circuit 2, the close limit circuit 3 and the simultaneous trigger circuit 4, prevent the external water, dust, etc. from causing short circuit of the line and damage to the equipment, and can also prevent bumps; the first indicator light 21, the second indicator light 31, the third indicator light 43 and the timer 44 connected in series to the simultaneous trigger circuit 4 are installed in the four installation holes in a one-to-one correspondence, which can facilitate the debugging personnel to observe.

[0043] Specifically, the colors of the first indicator light 21 , the second indicator light 31 , and the third indicator light 43 are different.

[0044] Optionally, the other side wall of the shell 5 is provided with a connecting hole connected to the installation cavity; the valve limit switch adjustment auxiliary tool also includes two open limit connection lines 6 and two closed limit connection lines 7, one end of the two open limit connection lines 6 are extended into the connecting hole and are respectively connected to the negative terminal of the power supply assembly in the installation cavity and the other terminal of the first indicator light 21, and the other ends of the two open limit connection lines 6 are located outside the installation cavity and are respectively connected to the two terminals of the open limit; one end of the two closed limit connection lines 7 are extended into the connecting hole and are respectively connected to the negative terminal of the power supply assembly in the installation cavity and the other terminal of the second indicator light 31, and the other ends of the two closed limit connection lines 7 are located outside the installation cavity and are respectively connected to the two terminals of the closed limit. In this embodiment, this setting can facilitate the connection of the negative terminal of the power supply assembly with the other terminal of the first indicator light 21 and the two terminals of the open limit, and the connection of the negative terminal of the power supply assembly with the other terminal of the second indicator light 31 and the two terminals of the closed limit.

[0045] Optionally, the valve limit switch adjustment auxiliary tool also includes two open limit quick connectors 8 and two closed limit quick connectors 9. The two open limit quick connectors 8 are respectively connected to the other ends of the two open limit connection lines 6 and are used to connect the two wiring terminals of the open limit; the two closed limit quick connectors 9 are respectively connected to the other ends of the two closed limit connection lines 7 and are used to connect the two wiring terminals of the closed limit. In this embodiment, this setting can further improve the connection efficiency between the negative terminal of the power supply component and the other terminal of the first indicator light 21 and the two wiring terminals of the open limit, and the connection efficiency between the negative terminal of the power supply component and the other terminal of the second indicator light 31 and the two wiring terminals of the closed limit. Specifically, the two open limit quick connectors 8 and the two closed limit quick connectors 9 are wiring clamps, respectively.

[0046] Optionally, the housing 5 is further provided with a heat dissipation hole connected to the installation cavity. In this embodiment, since the first relay 41 and the second relay 42 will generate a large amount of heat when working, this arrangement can dissipate heat inside the installation cavity, thereby preventing the internal temperature from being too high and avoiding affecting the internal circuit.

[0047] Optionally, the housing 5 includes a body and a cover plate, the installation cavity is provided in the body, the body is provided with an opening connected to the installation cavity, and the cover plate is used to close the opening and is detachably connected to the body. In this embodiment, this arrangement facilitates maintenance of the power supply component, the open limit circuit 2, the closed limit circuit 3, and the simultaneous trigger circuit 4 in the installation cavity. In other embodiments, the cover plate and the body can be hinged by hinges.

[0048] Optionally, the housing 5 further comprises a handle, which is used to be fixedly connected to the body. In this embodiment, this arrangement can facilitate the transportation of the valve limit switch adjustment auxiliary tool, which is beneficial to outdoor operations.

[0049] Optionally, the housing 5 is a hard plastic part. In this embodiment, this arrangement is beneficial to economic benefits and reduces manufacturing costs on the one hand, and can reduce the overall weight of the valve limit switch adjustment auxiliary tool on the other hand, thereby facilitating outdoor operations.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Valve limit switch adjustment auxiliary tool, characterized in that: include: Power supply components; An open limit circuit (2) comprises a first indicator light (21), wherein the positive terminal of the power supply assembly is connected to one terminal of the first indicator light (21), and the negative terminal of the power supply assembly and the other terminal of the first indicator light (21) are respectively used to be connected to two terminals of the open limit; A closing limit circuit (3) comprises a second indicator light (31), wherein the positive terminal of the power supply component is connected to one terminal of the second indicator light (31), and the negative terminal of the power supply component and the other terminal of the second indicator light (31) are respectively used to be connected to two terminals of the closing limit; A simultaneous triggering circuit (4) comprises a first relay (41), a second relay (42) and a third indicator light (43); a normally open terminal of the first relay (41), a normally open terminal of the second relay (42), the third indicator light (43) and the power supply component are sequentially connected in series; a control connector of the first relay (41) is connected in parallel with the first indicator light (21); and a control connector of the second relay (42) is connected in parallel with the second indicator light (31).

2. The valve limit switch adjustment auxiliary tool according to claim 1, characterized in that: It also includes a timer (44), which is connected in series to the simultaneous triggering circuit (4). When the timer (44) is powered on, the timer (44) starts timing, and when the timer (44) is powered off, the timer (44) stops timing.

3. The valve limit switch adjustment auxiliary tool according to claim 1, characterized in that: The power supply assembly comprises a first power supply (11), a second power supply (12) and a third power supply (13), wherein the first power supply (11) is connected in series to the open limit circuit (2), the second power supply (12) is connected in series to the close limit circuit (3), and the third power supply (13) is connected in series to the simultaneous trigger circuit (4).

4. The valve limit switch adjustment auxiliary tool according to any one of claims 1 to 3, characterized in that: It also includes a housing (5) provided with an installation cavity, wherein the power supply assembly, the opening limit circuit (2), the closing limit circuit (3) and the simultaneous trigger circuit (4) are all arranged in the installation cavity; One side wall of the housing (5) is provided with four mounting holes connected to the mounting cavity, and the first indicator light (21), the second indicator light (31), the third indicator light (43) and the timer (44) connected in series to the simultaneous triggering circuit (4) are mounted in the four mounting holes in a one-to-one correspondence.

5. The valve limit switch adjustment auxiliary tool according to claim 4, characterized in that: The other side wall of the housing (5) is provided with a communication hole communicating with the installation cavity; It also includes two open limit connection lines (6) and two closed limit connection lines (7), one end of the two open limit connection lines (6) are extended into the connecting hole and are respectively connected to the negative terminal of the power supply assembly in the installation cavity and the other terminal of the first indicator light (21), and the other end of the two open limit connection lines (6) are located outside the installation cavity and are respectively connected to the two terminals of the open limit; one end of the two closed limit connection lines (7) are extended into the connecting hole and are respectively connected to the negative terminal of the power supply assembly in the installation cavity and the other terminal of the second indicator light (31), and the other end of the two closed limit connection lines (7) are located outside the installation cavity and are respectively connected to the two terminals of the closed limit.

6. The valve limit switch adjustment auxiliary tool according to claim 4, characterized in that: It also includes two open limit quick connectors (8) and two close limit quick connectors (9), wherein the two open limit quick connectors (8) are respectively connected to the other ends of the two open limit connection lines (6) and are used to connect the two wiring terminals of the open limit; the two close limit quick connectors (9) are respectively connected to the other ends of the two close limit connection lines (7) and are used to connect the two wiring terminals of the close limit.

7. The valve limit switch adjustment auxiliary tool according to claim 4, characterized in that: The housing (5) is also provided with a heat dissipation hole connected to the installation cavity.

8. The valve limit switch adjustment auxiliary tool according to claim 4, characterized in that: The housing (5) comprises a body and a cover plate, the installation cavity is arranged in the body, the body is provided with an opening communicating with the installation cavity, and the cover plate is used to close the opening and is detachably connected to the body.

9. The valve limit switch adjustment auxiliary tool according to claim 8, characterized in that: The shell (5) also includes a handle, and the handle is used to be fixedly connected to the body.

10. The valve limit switch adjustment auxiliary tool according to claim 4, characterized in that: The housing (5) is a hard plastic part.

Images