Filter cartridge monitoring device for a hydraulic station

Abstract

The application relates to the technical field of hydraulic stations and discloses a filter element monitoring device of a hydraulic station, which is connected to a filter liquid outlet and comprises a hairpin pipe, a connecting pipe and a connecting mechanism; opposite two sections of the hairpin pipe are respectively communicated with a liquid outlet pipe and a liquid inlet pipe; a flexible section is arranged on the hairpin pipe connected with the liquid outlet pipe so as to adjust water pressure; a through hole is arranged on the hairpin pipe connected with the liquid inlet pipe, the through hole is opposite to a liquid inlet direction of the liquid inlet pipe, a plugging head is movably arranged at the through hole, and the plugging head and the hairpin pipe are further connected through a return spring. The monitoring device can detect liquid outlet pressure at the filter liquid outlet, adopts mechanical control, does not adopt too many electric elements, is more cost-saving, is stable and reliable in work, can detect the use condition of the filter, and can make liquid outlet pressure constant after the liquid outlet pressure of the filter is reduced.

Description

Technical Field

[0001] This invention relates to the field of hydraulic power station technology, and in particular to a filter element monitoring device for a hydraulic power station. Background Technology

[0002] Filters are an indispensable device in pipelines transporting media, and filter cartridges are an important component of filters. During the use of filter cartridges, it is necessary to monitor their service life. The service life of filter cartridges is usually determined by the rate of flow reduction at the outlet. That is, a monitoring device is installed at the outlet of the filter cartridge to detect the real-time flow value. Then, the rate of flow reduction at the outlet is determined by the ratio of the real-time flow value to the maximum flow value. The smaller the rate of reduction, the shorter the service life of the filter cartridge.

[0003] The existing monitoring device installed at the filter cartridge outlet is not easy to disassemble or maintain. Furthermore, the existing monitoring device cannot adjust the outlet water pressure in real time according to changes in the inlet water pressure, which causes inconvenience to users. Summary of the Invention

[0004] To address the technical problems mentioned in the background section, this invention provides a filter element monitoring device for a hydraulic power station.

[0005] The present invention is achieved by the following technical solution: a filter element monitoring device for a hydraulic station, which is connected to the filter outlet of the hydraulic station, including a loop pipe, a connecting pipe and a connecting mechanism.

[0006] Two opposite sections of the U-shaped tube are respectively connected to an outlet pipe and an inlet pipe. The U-shaped tube connected to the outlet pipe is provided with a flexible section to facilitate water pressure adjustment. The U-shaped tube connected to the inlet pipe has a through hole, which is directly opposite the inlet of the inlet pipe. A sealing head is movably inserted at the through hole. The sealing head and the U-shaped tube are also connected by a return spring. When the water pressure at the inlet pipe is less than a set value, the return spring drives the sealing head to block the inlet of the inlet pipe.

[0007] The outer end of the plug is also connected to an adjustment unit via a linkage mechanism. The adjustment unit is used to clamp the flexible section to tighten the flexible section when the water pressure at the inlet pipe decreases, thereby stabilizing the water pressure at the outlet pipe.

[0008] The connecting pipe and the inlet pipe are rotatably connected on the side away from the loop.

[0009] The connecting mechanism is used to connect the connecting pipe and the filter outlet.

[0010] As a further improvement to the above solution, there are two flexible sections, located on both sides of the liquid outlet pipe. The adjustment unit includes a central rod fixed inside the U-shaped tube and two sets of clamping members installed on the central rod. Each clamping member includes two intersecting clamping rods. A pin hole is provided at the intersection of the two clamping rods, and the central rod passes through the pin hole so that the two clamping rods in the same set of clamping members can rotate relative to each other. One end of each clamping rod is provided with an arc-shaped clamping part. The two clamping parts are located on both sides of the flexible section, and the two clamping rods are connected by an elastic return member.

[0011] As a further improvement to the above solution, the linkage mechanism includes two connecting rods fixed to the outer end of the sealing head, and a fixing rod fixed to the other end of each of the two connecting rods. Rollers are installed at both ends of the fixing rods, and the two rollers respectively roll in contact with the inner sides of the two clamping rods in the two sets of clamping components. During operation: The water pressure at the inlet pipe decreases, the sealing head gradually approaches the inlet of the inlet pipe, and the connecting rod drives the fixing rod to gradually move away from the center rod. At this time, under the action of the elastic return element, the clamping parts at the ends of the two clamping rods approach each other, thereby clamping and tightening the flexible section, which increases the water pressure at the outlet pipe.

[0012] As a further improvement to the above solution, a stop block is also installed on the outside of the U-shaped tube, and a sliding rod is fixed on the outside of the connecting rod. The end of the sliding rod can contact the stop block when the sealing head blocks the liquid inlet pipe. A pressure sensor that can contact the end of the sliding rod is installed on the stop block. The signal output terminal of the pressure sensor is electrically connected to a controller, and the signal output terminal of the controller can be connected to an external alarm device.

[0013] As a further improvement to the above solution, a middle tube is fixed to the side of the connecting tube, and the other end of the middle tube is rotatably connected to the inlet tube, with the two ends of the middle tube respectively connected to the connecting tube and the inlet tube.

[0014] As a further improvement to the above solution, the connecting mechanism 1 includes a rotary sleeve, a first connecting pipe and a second connecting pipe. The first connecting pipe and the connecting pipe are connected by a screw thread. One end of the rotary sleeve is rotatably sleeved on the outside of the first connecting pipe, and the other end of the rotary sleeve is screwed to the outer wall of the second connecting pipe. An installation gap is left between the first connecting pipe and the second connecting pipe, and the second connecting pipe is used for detachable connection with the filter outlet.

[0015] As a further improvement to the above scheme, several mounting grooves are provided on the inner wall of the end of the connecting pipe 2 that is close to the connecting pipe 1. An arc-shaped pressure plate is movably installed in each mounting groove, and a gap is left between the inner side of the pressure plate and the inner wall of the mounting groove. Several push plates are fixed on the end face of the connecting pipe 1 that is close to the connecting pipe 2. The end of the push plate extends into the gap, and the thickness of the push plate gradually increases along the direction that is gradually closer to the connecting pipe 1.

[0016] As a further improvement to the above solution, the inner wall of the first connecting pipe is provided with several sealing rings, which can expand and contract with changes in pressure. Several slots are opened circumferentially on the end face of the first connecting pipe, and the slots and the interior of the sealing rings are connected through air passages opened in the first connecting pipe. A piston rod is also movably installed in each slot, and the outer end of the piston rod is connected to the second connecting pipe.

[0017] As a further improvement to the above scheme, an annular groove is provided on the end face of the second connecting pipe, an annular block is rotatably installed in the annular groove, and the ends of the piston rods are all connected to the annular blocks.

[0018] As a further improvement to the above scheme, the outer wall of the second connecting pipe is provided with an external thread, and the inner wall of the rotary sleeve is provided with an internal thread that can be helically engaged with the external thread.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention proposes a filter element monitoring device for a hydraulic station, which is connected to the filter outlet and includes a U-shaped tube, a connecting tube, and a connecting mechanism. Two opposite sections of the U-shaped tube are respectively connected to an outlet pipe and an inlet pipe. A flexible section is provided on the U-shaped tube connected to the outlet pipe to facilitate water pressure adjustment. A through hole is opened on the U-shaped tube connected to the inlet pipe, with the through hole facing the inlet direction of the inlet pipe. A sealing head is movably inserted at the through hole. The sealing head and the U-shaped tube are connected by a return spring. When the inlet water pressure at the inlet pipe is less than a set value, the return spring drives the sealing head to seal the inlet of the inlet pipe. The outer end of the sealing head is also connected to an adjustment unit via a linkage mechanism. The adjustment unit is used to clamp the flexible section to tighten the flexible section when the inlet water pressure at the inlet pipe decreases, thereby maintaining a constant outlet water pressure at the outlet pipe.

[0020] The monitoring device proposed in this invention can detect the liquid pressure at the outlet of the filter. It adopts mechanical control and does not use too many electrical components, which saves costs. It is also stable and reliable in operation. It can not only detect the usage of the filter, but also make the liquid pressure after passing through the device constant when the liquid pressure of the filter decreases.

[0021] The monitoring device proposed in this invention includes a connecting mechanism, which facilitates the adjustment of the installation angle and position through the intermediate tube and the connecting tube. At the same time, the connecting mechanism facilitates quick and easy installation and disassembly with the filter outlet, making the operation quick and convenient. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the loop tube in the monitoring device proposed in this invention; Figure 2 This is a schematic diagram of the structure of the adjustment unit proposed in this invention. Figure 3This is a schematic diagram of the connection structure of the connection mechanism, the connection pipe, and the liquid inlet pipe proposed in this invention. Figure 4 For the present invention Figure 3 Enlarged view of point A; Figure 5 This is a schematic diagram of the end face structure of the second connecting pipe of the present invention.

[0023] Explanation of key symbols: In the diagram: 1. U-shaped tube; 2. Outlet pipe; 3. Inlet pipe; 4. Connecting pipe; 5. Intermediate pipe; 6. Sealing head; 7. Connecting rod; 8. Stop block; 9. Sliding rod; 10. Center rod; 11. Adjusting mechanism; 12. Flexible section; 13. Clamping rod; 14. Clamping part; 15. Roller; 16. Pin hole; 17. Fixing rod; 18. Connecting mechanism; 19. Threaded joint; 20. Filter outlet; 21. Rotary sleeve; 22. Connecting pipe one; 23. Connecting pipe two; 24. External thread; 25. Annular block; 26. Piston rod; 27. Slot; 28. Air passage; 29. ​​Sealing ring; 30. Push plate; 31. Pressure plate; 32. Gap. Detailed Implementation

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] Example

[0026] Reference Figure 1-5 The present solution proposes a filter element monitoring device for a hydraulic station, which is connected to the filter outlet 20 of the hydraulic station to facilitate monitoring of the filter outlet water pressure. The monitoring device includes a U-shaped pipe 1, a connecting pipe 4, and a connecting mechanism 18.

[0027] Reference Figure 1 Two opposite sections of the U-shaped pipe 1 are respectively connected to the outlet pipe 2 and the inlet pipe 3, and a flexible section 12 is provided on the U-shaped pipe 1 connected to the outlet pipe 2 to facilitate water pressure adjustment. (Refer to...) Figure 2The flexible section can be made of soft rubber, and its forming method involves creating an arc-shaped hole in the main body of the U-shaped tube 1, then covering the arc-shaped hole with a flexible layer. By squeezing the flexible layer, the diameter of the hole in the corresponding position of the U-shaped tube can be changed, thereby changing the water pressure. A through hole is provided on the U-shaped tube 1 connecting to the inlet pipe 3, directly opposite the inlet of the inlet pipe 3. A plug head 6 is movably inserted into the through hole. The plug head 6 and the U-shaped tube 1 are connected by a return spring (not shown). When the inlet water pressure at the inlet pipe 3 is less than a set value, the return spring drives the plug head 6 to block the inlet of the inlet pipe 3. This indicates that the filter's outlet pressure has dropped to a point where it cannot function properly. With the plug head 6 blocking the inlet pipe 3, and no liquid flowing out of the outlet pipe 2, it is a reminder to replace the filter element.

[0028] In this scheme, the outer end of the plugging head 6 is also connected to an adjustment unit through a linkage mechanism. The adjustment unit is used to clamp the flexible section 12 so as to tighten the flexible section 12 when the water pressure at the inlet pipe 3 decreases, thereby stabilizing the water pressure at the outlet pipe.

[0029] To facilitate installation with the filter outlet 20, the connecting pipe 4 and the inlet pipe 3 are rotatably connected on the side away from the loop pipe 1. The connecting mechanism 18 is used to connect the connecting pipe 4 and the filter outlet 20.

[0030] In this design, two flexible sections 12 are provided, located on opposite sides of the outlet pipe 2. The adjustment unit includes a central rod 10 fixed inside the U-shaped tube 1 and two sets of clamping members mounted on the central rod 10. Each clamping member includes two intersecting clamping rods 13, with pin holes 16 at the intersection of the two clamping rods 13. The central rod 10 moves through the pin holes 16, allowing the two clamping rods in the same set of clamping members to rotate relative to each other. One end of each clamping rod 13 is provided with an arc-shaped clamping part 14, located on opposite sides of the flexible section 12. The two clamping rods 13 are connected by an elastic return member. The elastic return member can be a return spring or a telescopic rod with a return spring installed.

[0031] As an optional embodiment of the present invention, the linkage mechanism includes two connecting rods 7 fixed to the outer end of the sealing head 6, and a fixing rod 17 fixed to the other end of each of the two connecting rods 7. Rollers 15 are installed at both ends of the fixing rods 17, and the two rollers 15 respectively roll in contact with the inner sides of the two clamping rods 13 in the two sets of clamping members.

[0032] During operation: When the inlet pressure at the inlet pipe 3 decreases, the sealing head 6 gradually approaches the inlet of the inlet pipe 3. The connecting rod 7 drives the fixing rod 17 to gradually move away from the center rod 10. At this time, under the action of the elastic restoring element, the clamping parts 14 at the ends of the two clamping rods 13 move closer to each other, thereby clamping and tightening the flexible section 12, which increases the outlet pressure at the outlet pipe 2. This achieves the goal of maintaining a constant outlet pressure, thus keeping the flow rate constant.

[0033] Specific reference Figure 1 A stop block 8 is installed on the outside of the U-shaped tube 1, and a sliding rod 9 is fixed on the outside of the connecting rod 7. The end of the sliding rod 9 can contact the stop block 8 when the sealing head 6 seals the inlet pipe 3. A pressure sensor that can contact the end of the sliding rod is installed on the stop block 8. The signal output terminal of the pressure sensor is electrically connected to a controller, and the signal output terminal of the controller can be connected to an external alarm device. In this solution, when the sliding rod 9 moves to the surface that can contact the stop block 8, the controller receives the signal from the pressure sensor and can control the external alarm device to sound an alarm, reminding the user to replace the filter element.

[0034] In this plan, refer to Figure 3 A middle tube 5 is fixed to the side of the connecting tube 4. The other end of the middle tube 5 is rotatably connected to the inlet tube 3, and the two ends of the middle tube 5 are respectively connected to the connecting tube 4 and the inlet tube 3.

[0035] As an optional embodiment of the present invention, the connection mechanism 18 proposed in this solution includes a rotary sleeve 21, a first connecting pipe 22, and a second connecting pipe 23. The first connecting pipe 22 and the connecting pipe 4 are connected by a screw thread 19. One end of the rotary sleeve 21 is rotatably sleeved on the outside of the first connecting pipe 22, and the other end of the rotary sleeve 21 is connected to the outer wall of the second connecting pipe 23 by a screw thread. An installation gap is left between the first connecting pipe 22 and the second connecting pipe 23, and the second connecting pipe 23 is used for detachable connection with the filter outlet 20.

[0036] It should be noted that several mounting grooves are provided on the inner wall of the end of the connecting pipe 23 near the connecting pipe 1 22. An arc-shaped pressure plate 31 is movably installed in each mounting groove, and a gap 32 is left between the inner side of the pressure plate 31 and the inner wall of the mounting groove. Several push plates 30 are fixed on the end face of the connecting pipe 1 22 near the connecting pipe 23. The end of the push plate 30 extends into the gap 32, and the thickness of the push plate 30 gradually increases along the direction that gradually approaches the connecting pipe 1 22.

[0037] The inner wall of the first coupling pipe 22 is provided with several sealing rings 29. The sealing rings 29 can expand and contract with the pressure change. Several slots 27 are opened circumferentially on the end face of the first coupling pipe 22. The slots 27 and the interior of the sealing rings 29 are connected through the air passages 28 opened in the first coupling pipe 22. A piston rod 26 is also movably installed in each slot 27. The outer end of the piston rod 26 is connected to the second coupling pipe 23.

[0038] An annular groove is provided on the end face of the connecting pipe 23, and an annular block 25 is rotatably installed in the annular groove, and the ends of the piston rod 26 are all connected to the annular block 25.

[0039] The outer wall of the connecting pipe 23 is provided with an external thread 24, and the inner wall of the rotating sleeve 21 is provided with an internal thread that can be helically engaged with the external thread 24.

[0040] In operation, the connection mechanism proposed in this solution first installs the connecting pipe 22 and the connecting pipe 4 using the threaded joint 19. Then, the filter outlet 20 enters the connecting pipe 23. Finally, the rotating sleeve 21 is rotated. Due to the threaded connection between the rotating sleeve 21 and the connecting pipe 23, the connecting pipe 23 gradually moves closer to the connecting pipe 22. At this time, the end of the push plate 30 extends into the gap 32, pressing the arc-shaped pressure plate 31 against the outside of the filter outlet 20, thus completing the fixed installation with the filter outlet 20. During this process, the piston rod 26 compresses the gas in the slot 27 into the sealing ring 29, causing the sealing ring 29 to increase in volume and thus sealingly contact the outer wall of the filter outlet 20.

[0041] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A filter element monitoring device for a hydraulic power station, connected to the filter outlet of the hydraulic power station, characterized in that, Includes U-shaped tubes, connecting tubes, and connecting mechanisms; Two opposite sections of the U-shaped tube are respectively connected to an outlet pipe and an inlet pipe. The U-shaped tube connected to the outlet pipe is provided with a flexible section to facilitate water pressure adjustment. The U-shaped tube connected to the inlet pipe has a through hole, which is directly opposite the inlet of the inlet pipe. A sealing head is movably inserted at the through hole. The sealing head and the U-shaped tube are also connected by a return spring. When the water pressure at the inlet pipe is less than a set value, the return spring drives the sealing head to block the inlet of the inlet pipe. The outer end of the plug is also connected to an adjustment unit via a linkage mechanism. The adjustment unit is used to clamp the flexible section so as to tighten the flexible section when the water pressure at the inlet pipe decreases, thereby stabilizing the water pressure at the outlet pipe. The connecting pipe and the inlet pipe are rotatably connected on the side away from the loop tube; The connecting mechanism is used to connect the connecting pipe and the filter outlet; The flexible section is provided in two parts, located on both sides of the liquid outlet pipe. The adjustment unit includes a central rod fixed inside the U-shaped tube and two sets of clamping members installed on the central rod. Each clamping member includes two clamping rods arranged in a cross configuration. A pin hole is provided at the intersection of the two clamping rods, and the central rod passes through the pin hole so that the two clamping rods in the same set of clamping members can rotate relative to each other. One end of each clamping rod is provided with an arc-shaped clamping part. The two clamping parts are located on both sides of the flexible section, and the two clamping rods are connected by an elastic return member. The linkage mechanism includes two connecting rods fixed to the outer end of the sealing head. The other end of each connecting rod is fixed with a fixing rod. Rollers are installed at both ends of the fixing rods, and the two rollers respectively roll in contact with the inner sides of the two clamping rods in the two sets of clamping components. During operation: The water pressure at the inlet pipe decreases, the sealing head gradually approaches the inlet of the inlet pipe, and the connecting rod drives the fixing rod to gradually move away from the center rod. At this time, under the action of the elastic return element, the clamping parts at the ends of the two clamping rods approach each other, thereby clamping and tightening the flexible section, which increases the water pressure at the outlet pipe.

2. The filter element monitoring device for a hydraulic station as described in claim 1, characterized in that, A stop block is also installed on the outside of the U-shaped tube, and a sliding rod is fixed on the outside of the connecting rod. The end of the sliding rod can contact the stop block when the sealing head blocks the liquid inlet pipe. A pressure sensor that can contact the end of the sliding rod is installed on the stop block. The signal output terminal of the pressure sensor is electrically connected to a controller, and the signal output terminal of the controller is connected to an external alarm device.

3. A filter element monitoring device for a hydraulic station as described in claim 1 or 2, characterized in that, A middle tube is fixed to the side of the connecting tube, and the other end of the middle tube is rotatably connected to the inlet tube. The two ends of the middle tube are respectively connected to the inlet tube and the connecting tube.

4. The filter element monitoring device for a hydraulic station as described in claim 3, characterized in that, The connecting mechanism includes a rotary sleeve, a first connecting pipe, and a second connecting pipe. The first connecting pipe and the connecting pipe are connected by a screw thread. One end of the rotary sleeve is rotatably sleeved on the outside of the first connecting pipe, and the other end of the rotary sleeve is screwed to the outer wall of the second connecting pipe. An installation gap is left between the first connecting pipe and the second connecting pipe, and the second connecting pipe is used for detachable connection with the outlet of the filter.

5. The filter element monitoring device for a hydraulic station as described in claim 4, characterized in that, The inner wall of the second connecting pipe near the first connecting pipe has several mounting grooves. Each mounting groove has an arc-shaped pressure plate movably installed in it, and there is a gap between the inner side of the pressure plate and the inner wall of the mounting groove. The end face of the first connecting pipe near the second connecting pipe is fixed with several push plates. The end of the push plate extends into the gap between the inner side of the pressure plate and the inner wall of the mounting groove, and the thickness of the push plate gradually increases along the direction that gradually approaches the first connecting pipe.

6. The filter element monitoring device for a hydraulic station as described in claim 5, characterized in that, The inner wall of the first connecting pipe is provided with several sealing rings, which can expand and contract with changes in pressure. Several slots are opened circumferentially on the end face of the first connecting pipe. The slots and the interior of the sealing rings are connected through air passages opened in the first connecting pipe. A piston rod is also movably installed in each slot, and the outer end of the piston rod is connected to the second connecting pipe.

7. The filter element monitoring device for a hydraulic station as described in claim 6, characterized in that, The end face of the second connecting pipe is provided with an annular groove, and an annular block is rotatably installed in the annular groove, and the ends of the piston rods are all connected to the annular blocks.

8. The filter element monitoring device for a hydraulic station as described in claim 7, characterized in that, The outer wall of the connecting tube 2 is provided with an external thread, and the inner wall of the rotary sleeve is provided with an internal thread that can helically engage with the external thread.

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