Valve position feedback signal interlocking device

Abstract

The utility model discloses a valve position feedback signal interlocking device which comprises an oxygen supply pipeline, a valve body arranged in the oxygen supply pipeline, a pneumatic controller arranged on one side of the oxygen supply pipeline and an adapter arranged between the pneumatic controller and the valve body. A connecting seat is arranged on one side of the pneumatic controller, a feedback box is arranged on the connecting seat, a plurality of inductors are arranged in the feedback box, an interlocking feedback assembly is arranged between the adapter and the feedback box, and the interlocking feedback assembly performs interlocking operation through movement of the adapter. The feedback box judges the opening and closing state of the valve body according to the operation state of the interlocking feedback assembly. The problems that a traditional valve is low in position feedback reliability and high in failure rate, and interlocking logic is prone to failure can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical automation control, and particularly relates to a valve position feedback signal interlock device. Background Art

[0002] As a key component of a chemical pipeline system, the control reliability of a chemical valve has a crucial impact on the safety, efficiency, and stability of the entire production process. For example, the fluid flow rate and pressure in different conveying pipelines need to be adjusted by the valve opening to ensure the stable progress of the process flow; when equipment needs to be maintained or the fluid needs to be intercepted in an emergency, the valve needs to be able to quickly cut off the fluid to ensure the safety of operators and equipment.

[0003] Currently, during the operation of a natural gas reformer, oxygen needs to be transported through an oxygen supply pipeline, and an oxygen valve is installed on the oxygen supply pipeline to control the opening and closing of the oxygen supply pipeline. As a key component in the chemical pipeline system of a natural gas reformer, the control reliability of the oxygen valve has a crucial impact on the safety, efficiency, and stability of the entire production process. When the existing oxygen valve is remotely and automatically controlled for opening and closing, a position feedback signal interlock device is installed on the oxygen valve to judge the opening and closing conditions of the oxygen valve. It mainly consists of a position sensor and a metal induction block. When the position sensor and the metal induction block are in contact, the automatic control system determines that the oxygen valve is in the closed state. However, the existing position feedback signal interlock device has the following problems:

[0004] 1. The valve position sensor is a single sensor. During the long-term use of the valve, the sensor or the bracket may become loose, resulting in changes in the sensing position and sensing distance of the position sensor, thereby losing the valve state display and causing the interlock control to fail;

[0005] 2. When the interlock program executes the program by judging the signal of a single position sensor, false action signals are easily generated, resulting in unnecessary linkage actions;

[0006] 3. If any part of the traditional valve position control device, such as the sensor, circuit, safety barrier, and channel, fails, the valve position feedback state and the interlock will fail; therefore, the existing device needs to be improved to solve the problems of low reliability, high failure rate, and easy failure of the interlock logic of the traditional valve position feedback. Summary of the Invention

[0007] In order to solve certain or some technical problems existing in the prior art, the purpose of this application is to provide a valve position feedback signal interlock device, which can solve the problems of low reliability, high failure rate, and easy failure of the interlock logic of the traditional valve position feedback.

[0008] To solve the above-mentioned existing technical problems, the present application adopts the following technical solutions to achieve:

[0009] A valve position feedback signal interlock device includes an oxygen supply pipeline, a valve body provided in the oxygen supply pipeline, a pneumatic controller provided on one side of the oxygen supply pipeline, and an adapter provided between the pneumatic controller and the valve body. The valve body is controlled to open and close through the pneumatic controller. A connection seat is provided on one side of the pneumatic controller, and a feedback box is provided on the connection seat. A plurality of sensors are provided in the feedback box. An interlock feedback component is provided between the adapter and the feedback box. The interlock feedback component operates in an interlock manner through the movement of the adapter. The feedback box judges the opening and closing state of the valve body through the operating state of the interlock feedback component.

[0010] Preferably, two parallel mounting grooves are provided on the connection seat, and the feedback box is provided in the mounting grooves.

[0011] Preferably, the interlock feedback component includes a valve position feedback rod with one end extending into the feedback box, a mechanical connecting rod provided at the outer end of the valve position feedback rod, a bracket provided on the adapter, and a valve rod provided on the bracket. The sensors are provided in the feedback box for detecting the position of the valve position feedback rod. The mechanical connecting rod and the valve rod are movably connected. The valve rod is controlled to lift and lower through the bracket on the adapter, and the mechanical connecting rod is driven to rotate along the valve position feedback rod through the lifting and lowering control of the valve rod.

[0012] Preferably, three sensors are provided in the feedback box. The sensors are position sensors. Three metal induction points respectively cooperating with the three sensors are provided on the valve position feedback rod, and the metal induction points rotate through the valve position feedback rod.

[0013] Preferably, a long strip-shaped linkage groove is provided on the mechanical connecting rod, and one end of the valve rod is located in the linkage groove.

[0014] Preferably, the bracket is of an L-shaped structure, the valve rod adopts a screw structure, and the valve rod is clamped and fixed on the L-shaped structure by two nuts.

[0015] Preferably, a U-shaped card slot is provided on the bracket

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] After detecting the interlock feedback components through respective sensors, independent signals can be transmitted to the control system. The control system outputs an interlock action through the logical judgment of at least 2 signal coincidences. The signal transmission of this device is independent, safe and reliable, and there will be no misoperation of a certain position sensor resulting in the triggering of the interlock. Even if a failure occurs in any part of a sensor, a line or a channel, the use of the valve will not be affected, and there will be no misoperation or failure of the interlock. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the feedback box of the interlock feedback component in the present utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the interlock feedback component in the present utility model;

[0021] In the figure: 1, oxygen supply pipeline; 2, valve body; 4, pneumatic controller; 3, adapter; 5, connection seat; 6, interlock feedback component; 7, feedback box; 8, installation groove; 9, valve position feedback rod; 10, metal induction point; 11, sensor; 12, linkage groove; 13, bracket; 14, valve stem; 15, U-shaped card slot; 16, mechanical connecting rod. Detailed Embodiments

[0022] Next, in combination with the drawings and specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be combined arbitrarily to form new embodiments.

[0023] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application.

[0024] The terms "first", "second", etc. in this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same category, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0025] As Figure 1 and Figure 2 As shown, a valve position feedback signal interlocking device includes an oxygen supply pipeline 1, a valve body 2 arranged in the oxygen supply pipeline 1, a pneumatic controller 4 arranged on one side of the oxygen supply pipeline 1, and an adapter 3 arranged between the pneumatic controller 4 and the valve body 2. The valve body 2 is controlled to open and close through the pneumatic controller 4. A connection seat 5 is arranged on one side of the pneumatic controller 4, and a feedback box 7 is arranged on the connection seat 5. A plurality of sensors 11 are arranged in the feedback box 7. An interlocking feedback assembly 6 is arranged between the adapter 3 and the feedback box 7. The interlocking feedback assembly 6 operates interlockingly through the movement of the adapter 3. The feedback box 7 judges the opening and closing state of the valve body 2 through the operating state of the interlocking feedback assembly 6.

[0026] The feedback box 7 is fixed on the pneumatic controller 4 through the connection seat 5. A plurality of sensors 11 are installed in the feedback box 7. The connecting rod of the valve body 2 and the piston rod of the pneumatic controller 4 are connected through the adapter 3. The adapter 3 and the feedback box 7 are connected through the interlocking feedback assembly 6. The plurality of sensors 11 are used to detect the state of the interlocking feedback assembly 6. When the pneumatic controller 4 drives the valve body 2 to perform opening and closing control, the adapter 3 will synchronously perform lifting control, thereby driving the operation of the interlocking feedback assembly 6. After detecting the interlocking feedback assembly 6 through each sensor 11 respectively, independent signals can be transmitted to the control system. The control system outputs an interlocking action through the logical judgment of at least 2 signal coincidences. The signal transmission of this device is independent, safe and reliable, and there will be no misoperation of a certain position sensor leading to the triggering of the interlock. Even if a failure occurs in any part of a sensor, a line, or a channel of this device, it will not affect the use of the valve, nor will it cause misoperation or failure of the interlock.

[0027] Further improved, two parallel mounting grooves 8 are arranged on the connection seat 5, and the feedback box 7 is arranged in the mounting grooves 8.

[0028] The feedback box 7 is installed in the installation groove 8 through a screw rod. During the installation process, the feedback box 7 can slide along the installation groove 8 to control the installation position of the feedback box 7, making the fixation of the feedback box 7 simpler and more convenient. The installation flexibility is higher.

[0029] Further improvement is as follows: Figure 3 As shown, the interlocking feedback assembly 6 includes a valve position feedback rod 9 with one end extending into the feedback box 7, a mechanical connecting rod 16 arranged at the outer end of the valve position feedback rod 9, a bracket 13 arranged on the adapter 3, and a valve stem 14 arranged on the bracket 13. The sensor 11 is arranged in the feedback box 7 for detecting the position of the valve position feedback rod 9. The mechanical connecting rod 16 and the valve stem 14 are movably connected. The valve stem 14 is lifted and lowered by the bracket 13 on the adapter 3, and the mechanical connecting rod 16 is driven to rotate along the valve position feedback rod 9 by the lifting and lowering control of the valve stem 14.

[0030] When the opening and closing position of the valve is linked to be controlled by connecting the feedback component, the end of the valve position feedback rod 9 is rotatably installed in the feedback box 7, and the mechanical connecting rod 16 is fixed to the outer end of the valve position feedback rod 9, the valve stem 14 is fixed on the bracket 13, and the bracket 13 is fixed on the adapter 3. When the adapter 3 is lifted and lowered by the pneumatic controller 4 during opening and closing, the bracket 13 and the valve stem 14 can be synchronously driven to be lifted and lowered, and the mechanical connecting rod 16 and the valve stem 14 are movably connected. When the valve stem 14 is lifted and lowered, the mechanical connecting rod 16 can be driven to rotate along the valve position feedback rod 9, thereby driving the valve position feedback rod 9 to rotate. The sensor 11 only needs to monitor the valve position feedback rod 9 to accurately judge the opening and closing state of the valve body 2. The interlocking feedback component 6 forms a linkage control with the valve body 2 on the pneumatic controller 4 through the mechanical connecting rod 16 and the valve stem 14, and a number of sensors 11 are installed in the feedback box 7, which can avoid the phenomenon of misjudgment, and the sensor 11 is not easily affected by external interference.

[0031] As a further improvement, three sensors 11 are provided in the feedback box 7, and the sensors 11 are position sensors. The valve position feedback rod 9 is provided with three metal sensing points 10 respectively cooperating with the three sensors 11, and the metal sensing points 10 are rotated by the valve position feedback rod 9.

[0032] The signal of the sensor 11 is connected to the safety barrier in the feedback box 7 through the signal wire of the terminal block, and then connected to the channel of the control system module from the other end of the safety barrier. When the switch position of the valve body 2 changes, three position sensors sense the respective metal induction points 10 on the valve position feedback rod 9. After judging the on-off signals of the three position sensors through the two-out-of-three logic of the system, the state of the valve is analyzed, so as to realize the correct interlock action. The valve position feedback signal interlock device is safe and reliable, and the position signal feedback action is accurate, solving the problem that the traditional single-sensor valve feedback is inaccurate and the risk of the program single-point misoperation triggering the interlock device to stop.

[0033] Further improved, a long strip-shaped linkage groove 12 is provided on the mechanical connecting rod 16, and one end of the valve rod 14 is located in the linkage groove 12.

[0034] One end of the mechanical connecting rod 16 is fixed on the valve position feedback rod 9, and one end of the valve rod 14 extends into the linkage groove 12. Since the mechanical connecting rod 16 rotates and the valve rod 14 moves up and down, after the two are connected through the linkage groove 12, the jamming phenomenon can be avoided, and the mechanical connecting rod 16 can rotate according to the different heights of the valve rod 14. The structure is simpler, and the installation inclination control of the mechanical connecting rod 16 is also more convenient. Generally, the mechanical connecting rod 16 and the valve position feedback rod 9 can be fixed by a clamping structure or a threaded connection, which is convenient for controlling the relative angle between the two.

[0035] Even further improved, the bracket 13 is of an L-shaped structure, the valve rod 14 adopts a screw rod structure, and the valve rod 14 is clamped and fixed on the L-shaped structure by two nuts; a U-shaped card slot 15 is provided on the bracket 13.

[0036] The bracket 13 is of an L-shaped structure, and the valve rod 14 is installed on the bracket 13 by adopting a screw rod structure, which can conveniently control the extending distance of the screw rod, so that the control of the length of the valve rod 14 extending into the linkage groove 12 is simpler. Among them, the valve rod 14 is clamped and fixed on the L-shaped structure by two nuts, which is more convenient during the assembly of the valve rod 14 and is not easy to move after installation. At the same time, a U-shaped card slot 15 is provided on the bracket 13. The bracket 13 is inserted into the connecting rod of the valve body 2 or the piston rod of the pneumatic controller 4 through the U-shaped card slot 15. Through the U-shaped card slot 15, the extending distance and the horizontal angle of the valve rod 14 can be adjusted, so that the valve rod 14 can be better connected to the linkage groove 12.

[0037] The above-mentioned embodiments are only the preferred embodiments of the present application, and the protection scope of the present application cannot be limited by this. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present application belong to the protection scope required by the present application.

Claims

1. A valve position feedback signal interlock device, comprising an oxygen supply pipeline (1), a valve body (2) arranged in the oxygen supply pipeline (1), a pneumatic controller (4) arranged on one side of the oxygen supply pipeline (1), and an adapter (3) arranged between the pneumatic controller (4) and the valve body (2), wherein the valve body (2) is controlled to open and close through the pneumatic controller (4), and is characterized in that: On one side of the pneumatic controller (4), there is a connecting seat (5). A feedback box (7) is provided on the connecting seat (5). A number of sensors (11) are arranged in the feedback box (7). An interlock feedback assembly (6) is provided between the adapter (3) and the feedback box (7). The interlock feedback assembly (6) operates in an interlocked manner through the movement of the adapter (3). The feedback box (7) determines the opening and closing state of the valve body (2) based on the operating state of the interlock feedback assembly (6).

2. The interlocking device for valve position feedback signal according to claim 1, characterized in that: Two parallel mounting grooves (8) are provided on the connecting seat (5), and the feedback box (7) is arranged in the mounting grooves (8).

3. The interlocking device for valve position feedback signal according to claim 1, wherein: The interlock feedback assembly (6) includes a valve position feedback rod (9) with one end extending into the feedback box (7), a mechanical connecting rod (16) arranged at the outer end of the valve position feedback rod (9), a bracket (13) arranged on the adapter (3), and a valve rod (14) arranged on the bracket (13). The sensor (11) is arranged in the feedback box (7) to detect the position of the valve position feedback rod (9). The mechanical connecting rod (16) and the valve rod (14) are movably connected. The valve rod (14) is controlled to lift and lower through the bracket (13) on the adapter (3), and the lifting and lowering control of the valve rod (14) drives the mechanical connecting rod (16) to rotate along the valve position feedback rod (9).

4. The interlocking device for valve position feedback signal according to claim 3, characterized in that: Three sensors (11) are arranged in the feedback box (7). The sensors (11) are position sensors. Three metal induction points (10) respectively cooperating with the three sensors (11) are arranged on the valve position feedback rod (9), and the metal induction points (10) rotate through the valve position feedback rod (9).

5. The valve position feedback signal interlocking device according to claim 3, characterized in that: A long strip-shaped linkage groove (12) is arranged on the mechanical connecting rod (16), and one end of the valve rod (14) is located in the linkage groove (12).

6. The interlock device for valve position feedback signal according to claim 5, characterized in that: The bracket (13) is of an L-shaped structure. The valve rod (14) adopts a screw structure, and the valve rod (14) is clamped and fixed on the L-shaped structure by two nuts.

7. The interlock device for valve position feedback signal according to claim 6, characterized in that: A U-shaped card slot (15) is arranged on the bracket (13).

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