Monitoring device for DCS system

Abstract

The invention relates to the technical field of DCS systems, and discloses a monitoring device used for a DCS system, the monitoring device comprises a substrate, a pre-tightening part and a positioning part, the bottom end of the substrate is fixedly provided with a sealing pipe, the surface of the sealing pipe is embedded with a sealing ring, the top end of the substrate is fixedly provided with a shell with an upper opening and a lower opening, the bottom of the shell is provided with a filter screen, and the pre-tightening part is connected with the positioning part. A cross-shaped partition plate is fixedly arranged at the top of the shell, the interior of the shell is divided into four fan-shaped cavities, and fan-shaped blades are installed in the cavities; according to the invention, the air duct is divided into four independent fan-shaped monitoring cavities through the cross-shaped partition plates in the shell, and the fan-shaped blades in each cavity only respond to the airflow state of the area; when a certain partition breaks down, only the opening degree of the corresponding blade changes obviously, and the change is displayed clearly through the external indication block and the indication ring, so that maintenance personnel can position a fault point at one eye.

Description

Technical Field

[0001] This invention relates to the field of DCS system technology, specifically a monitoring device for DCS systems. Background Technology

[0002] As the core of modern industrial automation, distributed control systems (DCS) integrate a large number of high-density electronic devices in their control cabinets, server cabinets, and other internal components. These devices generate significant heat during continuous operation, and to ensure system stability, they typically rely on forced air cooling formed by fan assemblies within the cabinets. Therefore, real-time and reliable monitoring of ventilation status is a key aspect of preventing equipment overheating and shutdown.

[0003] Currently, the industry mainly relies on electronic sensors, such as pressure switches, differential pressure transmitters, or electronic flow meters, to monitor the ventilation of DCS cabinets. However, these methods have the following problems in practical use: First, electronic sensors are expensive and require continuous power supply and complex signal wiring, increasing system complexity and deployment costs. Second, in the industrial environment with strong electromagnetic interference where DCS operates, electronic signals are easily disturbed, which may lead to false alarms or failures, raising questions about reliability. Third, most existing monitoring devices only provide an overall "normal / fault" status signal, which cannot accurately pinpoint which fan is malfunctioning or which area of ​​the air duct is blocked. When an alarm is triggered, maintenance personnel still need to check each one individually, which is inefficient and delays troubleshooting. Summary of the Invention

[0004] The purpose of this invention is to provide a monitoring device for DCS systems, which has the effect of accurate fault zone location function.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a monitoring device for a DCS system, comprising a base plate, a pre-tightening component, and a positioning component, wherein a sealing tube is fixedly provided at the bottom end of the base plate, a sealing ring is embedded on the surface of the sealing tube, a housing with openings at both the top and bottom is fixedly provided at the top end of the base plate, a filter screen is installed at the bottom of the housing, a cross-shaped partition is fixedly provided at the top of the housing, dividing the interior of the housing into four fan-shaped cavities, fan-shaped blades are installed inside the cavities, sealing skirts are provided on the sides of the blades, a rotating shaft rotatably connected to the side wall of the housing is installed at the bottom of the blades, and a torsion spring is sleeved on the rotating shaft.

[0006] A further feature of the present invention is that a mounting plate is fixedly provided at the bottom end of the housing, and the mounting plate is fixedly connected to the top end of the substrate by mounting bolts.

[0007] A further feature of the present invention is that: a ventilation plate is provided at the top of the housing, the surface of the ventilation plate is provided with ventilation holes corresponding to the cavity, the ventilation plate is connected to the top of the housing by fixing screws, and a sealing gasket is provided on the inner side of the ventilation plate.

[0008] A further feature of the present invention is that an annular limiting plate is fixedly provided at the bottom of the housing, and the filter screen is connected to the bottom end of the limiting plate by fixing bolts.

[0009] A further feature of the present invention is that the bottom end of the blade is connected to the rotating shaft via a mounting component, and the mounting component is connected to the bottom end of the blade via a fixing screw.

[0010] A further configuration of the present invention is as follows: an indicator block is fixedly provided at the outer end of the rotating shaft, and four indicator rings are fixedly provided on the outer side of the housing, with indicator scales provided on the surface of the indicator rings.

[0011] A further embodiment of the present invention is that the pre-tightening component includes an L-shaped clamping arm and an L-shaped connecting arm, the clamping arm has a guide groove inside that slides with the connecting arm, the vertical section of the connecting arm is fixedly installed on the top of the substrate, and a connecting spring is installed between the clamping arm and the connecting arm.

[0012] A further feature of the present invention is that: a rubber block is provided on the inner side of the vertical section of the clamping arm; a connecting seat one is fixedly provided at the top of the clamping arm; a connecting seat two is fixedly provided at the top of the connecting arm; and a connecting spring is installed between the connecting seat one and the connecting seat two.

[0013] A further feature of the present invention is that a mounting plate is fixedly provided at the bottom end of the vertical section of the connecting arm, and the mounting plate is connected to the top end of the base plate by connecting bolts.

[0014] A further configuration of the present invention is as follows: the positioning component includes a positioning plate, a connecting frame, a connecting shaft, and an eccentric cam. The surface of the positioning plate is provided with positioning holes. The connecting frame is fixedly disposed at the top of the positioning plate. The connecting shaft is rotatably connected to the end of the connecting frame. Both ends of the connecting shaft are fixedly provided with knobs. The eccentric cam is fixedly installed in the middle of the connecting shaft. The side of the base plate is fixedly provided with a locking plate corresponding to the eccentric cam.

[0015] In summary, the present invention has the following beneficial effects: 1. The entire device is composed entirely of mechanical structures and requires no external power supply or electronic signal processing unit. Its working principle is based on the balance between airflow and mechanical springs, which completely eliminates false alarms or failures caused by electromagnetic interference. It is particularly suitable for strong electromagnetic environments such as power plants and substations, with extremely high reliability and long service life. 2. The air duct is divided into four independent fan-shaped monitoring chambers by a cross-shaped baffle inside the housing. The fan-shaped blades in each chamber only respond to the airflow status of their own area. When a fault occurs in a certain section, only the opening of the corresponding blade changes significantly, which is clearly displayed by the external indicator block and indicator ring. This allows maintenance personnel to "locate" the fault point at a glance (such as a specific faulty fan or a blocked filter area), which greatly shortens the troubleshooting time and improves maintenance efficiency. 3. The installation method combines pre-tightening components and positioning components. The spring of the pre-tightening component provides initial clamping force, which facilitates quick insertion into the cabinet rail; the eccentric cam of the positioning component provides strong final mechanical locking force to ensure that the device does not loosen in a vibration environment; key components such as the filter screen and blades are all detachable modular designs, which facilitates cleaning, maintenance or replacement, and reduces the maintenance cost throughout the entire life cycle. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of the present invention; Figure 2 This is the second structural schematic diagram of the present invention; Figure 3 This is one of the structural schematic diagrams of the housing of the present invention; Figure 4 This is a second schematic diagram of the structure of the housing of the present invention; Figure 5 This is one of the structural schematic diagrams of the blade of the present invention; Figure 6 This is the second schematic diagram of the blade structure of the present invention; Figure 7 This is a schematic diagram of the pre-tightening component of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the cross-sectional structure; Figure 9 This is a schematic diagram of the positioning component of the present invention.

[0017] In the diagram: 1. Base plate; 101. Sealing tube; 102. Sealing ring; 103. Locking plate; 2. Housing; 201. Mounting plate; 202. Mounting bolt; 203. Limiting plate; 204. Filter screen; 205. Fixing bolt; 206. Partition plate; 207. Ventilation plate; 3. Blade; 301. Sealing skirt; 302. Rotating shaft; 303. Mounting component; 304. Indicator block; 305. Indicator ring; 4. Pre-tightening component; 401. Clamping arm; 402. Rubber block; 403. Connecting seat one; 404. Connecting arm; 405. Connecting seat two; 406. Connecting spring; 407. Mounting plate; 408. Connecting bolt; 409. Guide groove; 5. Positioning component; 501. Positioning plate; 502. Positioning hole; 503. Connecting frame; 504. Connecting shaft; 505. Eccentric cam; 506. Knob. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] Please see Figures 1-9 In this embodiment of the invention, a monitoring device for a DCS system includes a base plate 1, a pre-tightening component 4, and a positioning component 5.

[0020] The base plate 1 serves as the mounting base for the entire device, and a cylindrical sealing tube 101 is vertically fixed (e.g., welded) to its bottom end. The outer diameter of the sealing tube 101 matches the inner diameter of the standard air outlet of the target DCS cabinet. An annular groove is opened on its tube wall, and an O-ring rubber sealing ring 102 is embedded in the groove. During installation, the sealing tube 101 is inserted into the air outlet of the cabinet, and the sealing ring 102 is used to achieve a sealed connection, thereby ensuring that the hot airflow that needs to be discharged from the cabinet can be completely introduced into the device without bypass leakage.

[0021] A mounting plate 201 is fixedly connected to the top of the base plate 1 by multiple mounting bolts 202. The mounting plate 201 is integrally formed or fixedly connected to the bottom of the housing 2. The housing 2 is a cylindrical structure that runs vertically through the body. An annular limiting step is formed on the inner side of its bottom, or an annular limiting plate 203 is connected to it. A detachable filter screen 204 is installed below the limiting plate 203 by multiple fixing bolts 205 to filter the air entering the device and prevent dust from entering the internal precision mechanical parts. A ventilation plate 207 is installed on the top of the housing 2 by multiple fixing screws. An annular sealing gasket (such as a rubber gasket) is pasted on the inner side of the ventilation plate 207 to ensure a seal with the top surface of the housing 2 and the internal structure. Four sets of ventilation hole arrays or grids are precisely opened on the ventilation plate 207. The position of each set of ventilation holes is aligned vertically with a fan-shaped monitoring cavity inside the housing, serving as the final airflow outlet of each independent cavity.

[0022] Inside the center of the housing 2, a cross-shaped partition 206 is fixedly installed; the outer edge of the partition 206 is sealed to the inner wall of the housing 2, thereby strictly dividing the internal space of the housing 2 into four completely independent sector-shaped cavities in the circumferential direction.

[0023] Within each sector-shaped cavity, a sector-shaped blade 3 is suspended and installed. The blade 3 is preferably made of lightweight metal (such as aluminum plate) or high-strength engineering plastic. Its shape is a sector corresponding to the cavity, but its radial dimension and arc side length are slightly smaller than the internal dimensions of the cavity, so that there is a radial gap of about 1.5-3mm between the outer arc side of the blade 3 and the outer arc wall of the cavity, and a lateral gap of about 1-2mm between its two radial sides and the cross partition 206. The key point is that on the two radial sides of the blade 3, a sealing skirt 301 made of flexible material (such as silicone rubber or polyurethane) is bonded or embedded along the entire length of the edge. The sealing skirt 301 is designed to protrude slightly from the side plane of the blade 3.

[0024] At the geometric center of the bottom surface of blade 3, a mounting component 303 is vertically installed by a fixing screw; the mounting component 303 is a connecting sleeve with a flange; one end of a rotating shaft 302 is coaxially and rigidly fixed to the flange of the mounting component 303 by a key connection or a set screw; the other end of the rotating shaft 302 is rotatably supported in the side wall of the housing 2 by a pair of miniature deep groove ball bearings, so that the blade 3 can rotate very smoothly in the cavity around the axis of the rotating shaft 302; more importantly, a torsion spring (not shown in the figure) is fitted on the rotating shaft 302; one end of the torsion spring is fixed to the rotating shaft 302, and the other end is fixed to the housing 2 or the bearing seat, and its preload is set to keep the blade 3 in the vertical closed position (i.e., 0-degree position, the plane of the blade 3 is parallel to the cross partition 206, completely blocking its own cavity passage) in the absence of airflow.

[0025] To convert the mechanical movement of the internal blades into an externally visible indication, an indicator block 304 is fixedly installed at one end of the rotating shaft 302 extending outward from the housing 2. This indicator block 304 can be an arrow-shaped pointer, a colored marker, etc. Correspondingly, four indicator rings 305 are fixedly installed on the outer wall of the housing 2, facing the four fan-shaped cavities. The surface of each indicator ring 305 is printed with angle scales and / or conspicuous color divisions (e.g., a green "normal" area and a red "fault" area).

[0026] To facilitate quick installation and fixation on the upright guide rails of the cabinet, pre-tightening components 4 and positioning components 5 are symmetrically arranged on the side of the base plate 1. The pre-tightening component 4 mainly consists of an L-shaped clamping arm 401 and an L-shaped connecting arm 404. The bottom end of the vertical section of the connecting arm 404 is fixed to the base plate 1 by a mounting plate 407 and connecting bolts 408. An anti-slip rubber block 402 is bonded to the inner side of the vertical section of the clamping arm 401, and a guide groove 409 is opened inside its horizontal section. The horizontal section of the connecting arm 404 is inserted into the guide groove 409 to achieve a sliding fit. A connecting seat 1 403 and a connecting seat 2 405 are fixed at the top of the clamping arm 401 and the connecting arm 404, respectively. A connecting spring 406 is installed between the two to provide a continuous inward clamping force for the clamping arm 401, so that the device can be elastically and initially locked onto the rack rail.

[0027] The positioning component 5 is used for final locking; it includes a positioning plate 501 fixed to the cabinet column through a positioning hole 502 and bolts; a connecting frame 503 is welded on the positioning plate 501, a connecting shaft 504 passes through the connecting frame 503 and is rotatable, with knobs 506 at both ends and an eccentric cam 505 fixed in the middle; a locking plate 103 is fixed on the side of the base plate 1; when the device is initially inserted, the knobs 506 are rotated, the eccentric cam 505 rotates accordingly and presses the locking plate 103, thereby firmly locking the device on the cabinet and preventing it from loosening due to vibration.

[0028] In use, when the cooling fan inside the DCS cabinet is running normally, hot air is discharged from the cabinet's air outlet and enters the device through the sealing pipe 101. The airflow first passes through the filter screen 204 and then flows upward into four independent fan-shaped cavities separated by the housing 2 and the cross partition 206. In each cavity, the airflow acts on the concave surface (windward side) of the fan-shaped blades 3, generating a torque that pushes the blades 3 to rotate around the rotation axis 302. As the blades 3 begin to rotate, the flexible sealing skirt 301 on its side maintains a small non-contact gap with the cross partition 206 at the normal opening (usually designed to be 30° to 60°). This makes the frictional resistance of the blades 3 extremely small and the sensitivity high. As the opening angle of the blades 3 increases, the torsion spring (not shown in the figure, usually installed on the section of the rotation axis 302 inside the housing 2) sleeved on the rotation axis 302... When tightened, a resetting torque is generated in the opposite direction, attempting to close the blade 3. When the rotational torque generated by the airflow thrust balances the resetting torque of the torsion spring, the blade 3 will remain stationary at a stable opening angle. At the same time, the indicator block 304 (such as a pointer) fixedly connected to the end of the rotating shaft 302 also rotates synchronously, pointing to the "normal" area or a specific angle scale on the indicator ring 305 on the outer side of the housing 2. At this time, the indicating positions of the four indicator blocks 304 are basically consistent, indicating that the ventilation of the four heat dissipation zones is normal. The airflow is finally discharged from the device through the corresponding ventilation holes on the top ventilation plate 207. When a heat dissipation zone malfunctions (e.g., the fan stops or the filter 204 is severely blocked), the airflow pressure in the corresponding fan-shaped cavity drops significantly or disappears. In this cavity, the thrust torque of the airflow on the blade 3 decreases, and it can no longer balance the resetting torque of the torsion spring. Under the action of the spring force, blade 3 begins to swing back towards the closed position (i.e., the initial position of 0°); as the opening angle of blade 3 decreases, its side sealing skirt 301 gradually approaches the cross diaphragm 206; when blade 3 swings back to a small preset angle (e.g., 10° to 15°, close to the closed state), the flexible sealing skirt 301 contacts the surface of the cross diaphragm 206 and generates a slight compression, forming an effective contact seal. This completely prevents the airflow from the adjacent normal cavity from "sneaking" into the fault cavity through the lateral gap, thereby preventing the fault indicator from being... The cover ensures that the blades 3 of the faulty cavity can be fully pulled back to the closed or near-closed position by the spring force. At this time, the indicator block 304 corresponding to the faulty cavity will rotate with the rotating shaft 302, pointing to the "fault" area on the indicator ring 305 or a position significantly different from the normal angle (such as the 0° scale), forming a clear visual contrast of "one red and three green" or "one low and three high". Maintenance personnel can instantly and accurately locate the specific zone where the ventilation fault has occurred simply by observing the position of the external indicator block 304 without the need for any tools or instruments, which greatly improves maintenance efficiency. During installation, first align the clamping arms 401 of the pre-tightening components 4 on both sides of the base plate 1 with the vertical mounting guide rails on both sides of the cabinet. Utilize the rebound force of the connecting spring 406 to clamp the rubber block 402 inside the clamping arm 401 into the groove or side of the guide rail, achieving initial elastic pre-fixation of the device. Subsequently, operate the positioning component 5 to pre-fix the positioning plate 501 to a suitable position on the cabinet column through its positioning hole 502. Rotate the knob 506 to drive the connecting shaft 504 and the eccentric cam 505 fixed thereon to rotate. When the knob 506 is rotated to the locking position, the protruding part of the eccentric cam 505 presses tightly against the locking plate 103 on the side of the base plate 1. Utilizing the self-locking principle of the eccentric wheel, a strong inward locking force is generated, ultimately locking the device firmly onto the guide rail, effectively preventing loosening caused by equipment vibration. During disassembly, rotate the knob 506 in the opposite direction to release the eccentric cam 505, and the device can be easily removed.

[0029] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A monitoring device for a DCS system, comprising a base plate (1), a pre-tightening component (4), and a positioning component (5), characterized in that, A sealing tube (101) is fixedly provided at the bottom end of the substrate (1), and a sealing ring (102) is embedded on the surface of the sealing tube (101). A shell (2) with openings at both the top and bottom is fixedly provided at the top end of the substrate (1). A filter screen (204) is installed at the bottom of the shell (2). A cross-shaped partition (206) is fixedly provided at the top of the shell (2), dividing the interior of the shell (2) into four fan-shaped cavities. Fan-shaped blades (3) are installed inside the cavities. A sealing skirt (301) is provided on the side of the blade (3). A rotating shaft (302) that is rotatably connected to the side wall of the shell (2) is installed at the bottom of the blade (3). A torsion spring is sleeved on the rotating shaft (302).

2. The monitoring device for a DCS system according to claim 1, characterized in that: The bottom end of the housing (2) is fixedly provided with a mounting plate (201), and the mounting plate (201) is fixedly connected to the top end of the base plate (1) by mounting bolts (202).

3. The monitoring device for a DCS system according to claim 1, characterized in that: The top of the housing (2) is provided with a ventilation plate (207), the surface of the ventilation plate (207) is provided with ventilation holes corresponding to the cavity, the ventilation plate (207) is connected to the top of the housing (2) by fixing screws, and the inner side of the ventilation plate (207) is provided with a sealing gasket.

4. The monitoring device for a DCS system according to claim 1, characterized in that: The bottom of the housing (2) is fixedly provided with an annular limiting plate (203), and the filter screen (204) is connected to the bottom end of the limiting plate (203) by fixing bolts (205).

5. The monitoring device for a DCS system according to claim 1, characterized in that: The bottom end of the blade (3) is connected to the rotating shaft (302) via a mounting component (303), and the mounting component (303) is connected to the bottom end of the blade (3) via a fixing screw.

6. The monitoring device for a DCS system according to claim 5, characterized in that: An indicator block (304) is fixedly provided at the outer end of the rotating shaft (302), and four indicator rings (305) are fixedly provided on the outer side of the housing (2). The surface of the indicator rings (305) is provided with indicator scale.

7. The monitoring device for a DCS system according to claim 1, characterized in that: The pre-tightening component (4) includes an L-shaped clamping arm (401) and an L-shaped connecting arm (404). The clamping arm (401) has a guide groove (409) that slides with the connecting arm (404). The vertical section of the connecting arm (404) is fixedly installed on the top of the base plate (1). A connecting spring (406) is installed between the clamping arm (401) and the connecting arm (404).

8. The monitoring device for a DCS system according to claim 7, characterized in that: The inner side of the vertical section of the clamping arm (401) is provided with a rubber block (402), the top end of the clamping arm (401) is fixedly provided with a connecting seat one (403), the top end of the connecting arm (404) is fixedly provided with a connecting seat two (405), and the connecting spring (406) is installed between the connecting seat one (403) and the connecting seat two (405).

9. The monitoring device for a DCS system according to claim 8, characterized in that: The bottom end of the vertical section of the connecting arm (404) is fixedly provided with a mounting plate (407), and the mounting plate (407) is connected to the top end of the base plate (1) by connecting bolts (408).

10. The monitoring device for a DCS system according to claim 1, characterized in that: The positioning component (5) includes a positioning plate (501), a connecting frame (503), a connecting shaft (504), and an eccentric cam (505). The surface of the positioning plate (501) is provided with a positioning hole (502). The connecting frame (503) is fixedly installed at the top of the positioning plate (501). The connecting shaft (504) is rotatably connected to the end of the connecting frame (503). Both ends of the connecting shaft (504) are fixedly provided with knobs (506). The eccentric cam (505) is fixedly installed in the middle of the connecting shaft (504). The side of the base plate (1) is fixedly provided with a locking plate (103) corresponding to the eccentric cam (505).

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