Programmable regenerative load

Abstract

This utility model provides a programmable feedback load, including a programmable feedback load box housing. A test element is fixedly installed on the inner wall of the programmable feedback load box housing. It also includes a moisture-proof structure housed inside the programmable feedback load box housing. A desiccant ensures the dryness of the inside of the programmable feedback load box housing. When the desiccant becomes saturated, a red warning light illuminates, providing a warning and allowing operators to easily determine whether the desiccant is saturated by observing the red warning light, enabling timely replacement of the desiccant. By pulling two ropes on both sides, the baffle can be moved outwards, allowing the entire moisture-proof structure to be removed from the programmable feedback load box housing, facilitating convenient replacement of the desiccant inside the box.

Description

Technical Field

[0001] This utility model relates to the field of regenerative load technology, and more particularly to programmable regenerative load. Background Technology

[0002] Programmable regenerative loads are advanced testing devices primarily used for the testing, calibration, and simulation of power electronic devices. They regulate the output signal by precisely controlling the operating state of the electronic load, ensuring stability and accuracy during testing. Equipped with a bidirectional three-phase full-bridge inverter unit and a DC-DC converter unit, programmable regenerative loads can feed excess electrical energy absorbed during testing back to the grid, achieving energy recycling and resulting in significant energy savings.

[0003] To improve heat dissipation, programmable regenerative load cells typically have ventilation slots on their side walls. However, while these slots dissipate heat, they also allow external moisture to enter the load cell. This is especially problematic during the rainy season in southern regions, when humidity levels are high. A large influx of moisture into the load cell can affect the internal test components, potentially causing malfunctions or damage and impacting the overall lifespan of the programmable regenerative load cell. Therefore, effectively preventing moisture buildup inside the programmable regenerative load cell is a crucial design challenge. Utility Model Content

[0004] This invention provides a programmable regenerative load to solve the problem of moisture affecting the test elements inside a programmable regenerative load cell.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0006] This utility model provides a programmable regenerative load, including a programmable regenerative load housing, on which a test element is fixedly disposed, and further comprising:

[0007] A moisture-proof structure is installed inside the programmable feedback load cell housing.

[0008] A snap-fit ​​limiting structure is provided on the moisture-proof structure to fix and limit the moisture-proof structure.

[0009] Preferably, a fixing frame is fixedly connected to the inner wall of the programmable feedback load cell housing, a ventilation groove is provided on the top side wall of the fixing frame, and a baffle is fixedly connected to the inner side wall of the ventilation groove.

[0010] In this technical solution, the desiccant can absorb moisture inside the programmable feedback load cell housing through the ventilation slot, thereby ensuring the dryness of the inside of the programmable feedback load cell housing. The baffle can block the desiccant, preventing it from scattering inside the programmable feedback load cell housing.

[0011] Preferably, the programmable feedback load cell housing has a square through groove and a sliding groove on the front side wall, and two snap-fit ​​limiting grooves are provided on the side walls on both sides of the square through groove. A push switch is fixedly connected to the bottom inner side wall of the sliding groove.

[0012] Preferably, a red warning light is fixedly connected to the front side wall of the programmable regenerative load cell housing, and the red warning light is electrically connected to a push switch. Heat dissipation grooves are provided on the top and side walls of the programmable regenerative load cell housing. A fixing ring is fixedly connected to the top of the programmable regenerative load cell housing, and casters are fixedly connected to the bottom side wall of the programmable regenerative load cell housing.

[0013] In this technical solution, when the push switch is pressed, the red warning light illuminates to provide a warning reminder. The heat dissipation slots can assist in heat dissipation inside the programmable feedback load cell housing. The casters are casters with automatic functions.

[0014] Preferably, the moisture-proof structure includes a baffle, a fixing plate, a spring, a support plate, and a sliding groove. The fixing plate is fixedly connected to the side wall of the baffle, and the springs are fixedly connected at equal intervals to the top side wall of the fixing plate. The support plate is fixedly connected to the top side wall of the springs. The baffle, the fixing plate, and the support plate are slidably connected to the bottom inner side wall of the programmable feedback load cell housing through the square groove. The sliding groove is provided in the middle of the side wall of the baffle.

[0015] Preferably, the side wall of the baffle is provided with a sliding groove and a rope threading groove, the sliding groove and the rope threading groove are interconnected, and a guide roller is rotatably connected to the side wall of the rope threading groove.

[0016] In this technical solution, the guide roller can assist the pull rope in sliding, reducing the frictional resistance when the pull rope slides.

[0017] Preferably, the moisture-proof structure includes a pressing frame, a placement box, and a desiccant. The placement box is placed on top of the support plate, the pressing frame is fixedly connected to the side wall of the placement box, the pressing frame is slidably connected in a sliding groove, and the desiccant is placed inside the placement box.

[0018] In this technical solution, as the desiccant absorbs more and more moisture, its weight increases. The increased weight of the desiccant in the placement box causes the support plate of the placement box to move downward. Once the spring is compressed, the placement box drives the pressing frame to descend. When the desiccant is saturated, the pressing frame presses down on the push switch, thus pressing the push switch.

[0019] Preferably, the pressing frame and the sliding groove cooperate with each other.

[0020] In this technical solution, the pressing frame can be slidably inserted into the sliding groove.

[0021] Preferably, the locking and limiting structure includes a pull rope, a second spring, a sliding block, and a locking block. The locking block is fixedly connected to the side wall of the sliding block. The sliding block and the locking block are slidably connected in the second sliding groove. The end side wall of the locking block is inclined. The second spring is fixedly connected between the inner side wall of the sliding block and the second sliding groove. One end of the pull rope is fixedly connected to the side wall of the sliding block, and the other end of the pull rope passes through the second spring and is fixedly connected to the side wall of the baffle.

[0022] In this technical solution, pulling the two pull ropes on both sides first causes the sliding block to move, compressing the second spring. The sliding block then causes the locking block to move, causing the locking block to leave the locking limiting groove and no longer restrict the movement of the moisture-proof structure. After the sliding block slides into the second sliding groove, it is restricted by the inner side wall of the second sliding groove and cannot continue to move. At this time, if the pull rope is pulled again, the pull rope will pull the baffle to move outward. After the baffle is pulled out of the programmable feedback load cell housing, the hand can grasp the side wall of the baffle and remove the entire moisture-proof structure from the programmable feedback load cell housing.

[0023] Preferably, the snap-fit ​​block and the snap-fit ​​limiting groove cooperate with each other.

[0024] In this technical solution, the snap-fit ​​block snaps into the snap-fit ​​limiting groove to fix the moisture-proof structure.

[0025] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0026] The positive and progressive effects of this utility model are as follows:

[0027] 1. The desiccant absorbs moisture inside the programmable feedback load cell housing through the ventilation slots, thus ensuring the dryness of the housing. As the desiccant absorbs more and more moisture, its weight increases, causing the support plate and pressing frame to descend. When the desiccant is saturated, the pressing frame presses down on the push switch. Pressing the switch illuminates a red warning light, providing a warning. This not only effectively prevents moisture absorption but also allows staff to observe the red warning light to determine if the desiccant is saturated, enabling timely replacement.

[0028] 2. By pulling the two ropes on both sides, the ropes first move the locking block, causing it to leave the locking restriction groove and no longer be restricted by the movement of the moisture-proof structure. After the sliding block slides into the second sliding groove, it is restricted by the inner side wall of the second sliding groove and cannot continue to move. Continue pulling the rope, and the rope will pull the baffle to move outward. After the baffle is pulled out of the programmable feedback load box housing, grasp the side wall of the baffle with your hand to remove the entire moisture-proof structure from the programmable feedback load box housing, making it easier to replace the desiccant in the box. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0030] Figure 2 This is a schematic diagram of the overall internal structure of this utility model.

[0031] Figure 3 This is a side view of the internal structure of the present invention.

[0032] Figure 4 This is a top view of the internal structure of the present invention.

[0033] Figure 5 The whole of this utility model Figure 4 A magnified schematic diagram of the structure at point A.

[0034] Explanation of reference numerals in the attached figures

[0035] 1. Vaginal cleaning cylinder; 2. Vaginal cleaning structure; 201. Fluid inlet pipe 1; 202. Connecting pipe; 211. Threaded sleeve; 212. Silicone gasket; 213. Fluid inlet; 214. Cleaning pipe; 215. Sealing ring 1; 3. Fluid pushing structure; 301. Connecting rod; 302. Rotating rod; 303. Connecting sleeve; 304. Fixing plate; 305. Fluid pushing block; 306. Sealing gasket; 307. Rotating block; 311. Pressing frame; 312. Spring 1; 313. Threaded rod 314. Telescopic rod; 4. Liquid passage pipe II; 5. Liquid passage hose; 6. Liquid storage cylinder; 7. Sealing connection cap; 8. Liquid passage pipe III; 9. Fixing ring; 10. Liquid pusher; 11. Liquid passage groove I; 12. Sealing structure; 1201. Sealing block; 1202. Liquid passage groove II; 1203. Sealing ring II; 1204. Connecting round rod; 1205. Connecting square rod; 13. Sliding square groove; 14. Circular through groove I; 15. Threaded groove; 16. Circular through groove II; 17. Spring II. Detailed Implementation

[0036] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0037] like Figure 1-5 As shown, the programmable regenerative load includes a programmable regenerative load housing 1, on which a test element 7 is fixedly disposed, and further includes:

[0038] Moisture-proof structure 4 is installed inside the programmable feedback load cell housing 1;

[0039] A snap-fit ​​limiting structure 13 is provided on the moisture-proof structure 4, and the snap-fit ​​limiting structure 13 fixes and restricts the moisture-proof structure 4.

[0040] A fixing frame 8 is fixedly connected to the inner wall of the programmable feedback load cell housing 1. A ventilation groove 9 is provided on the top side wall of the fixing frame 8. A baffle 10 is fixedly connected to the inner wall of the ventilation groove 9.

[0041] The desiccant 413 can absorb the moisture inside the programmable feedback load cell housing 1 through the ventilation slot 9, thereby ensuring the dryness of the inside of the programmable feedback load cell housing 1. The baffle 10 can block the desiccant 413 and prevent the desiccant 413 from being scattered inside the programmable feedback load cell housing 1.

[0042] The programmable feedback load cell housing 1 has a square through groove 18 and a sliding groove 11 on the front side wall. Two snap-fit ​​limiting grooves 14 are provided on the side walls on both sides of the square through groove 18. A push switch 12 is fixedly connected to the bottom inner side wall of the sliding groove 11.

[0043] A red warning light 2 is fixedly connected to the front side wall of the programmable feedback load cell housing 1. The red warning light 2 is electrically connected to the push switch 12. Heat dissipation grooves 3 are provided on the top and side walls of the programmable feedback load cell housing 1. A fixing ring 6 is fixedly connected to the top of the programmable feedback load cell housing 1. A caster wheel 5 is fixedly connected to the bottom side wall of the programmable feedback load cell housing 1.

[0044] When the push switch 12 is pressed, the red warning light 2 lights up to provide a warning. The heat dissipation slot 3 can assist in heat dissipation inside the programmable feedback load box housing 1. The casters 5 are casters with automatic function.

[0045] The moisture-proof structure 4 includes a baffle 401, a fixing plate 402, a spring 403, a support plate 404, and a sliding groove 405. The fixing plate 402 is fixedly connected to the side wall of the baffle 401. The spring 403 is fixedly connected at equal intervals to the top side wall of the fixing plate 402. The support plate 404 is fixedly connected to the top side wall of the spring 403. The baffle 401, the fixing plate 402, and the support plate 404 are slidably connected to the bottom inner side wall of the programmable feedback load cell housing 1 through the square groove 18. The sliding groove 405 is opened in the middle of the side wall of the baffle 401.

[0046] The side wall of the baffle 401 is provided with a sliding groove 15 and a rope threading groove 16, which are connected to each other. A guide roller 17 is rotatably connected to the side wall of the rope threading groove 16.

[0047] The guide roller 17 can assist the pull rope 1301 in sliding, reducing the frictional resistance when the pull rope 1301 slides.

[0048] The moisture-proof structure 4 includes a pressing frame 411, a placement box 412, and a desiccant 413. The placement box 412 is placed on top of the support plate 404. The pressing frame 411 is fixedly connected to the side wall of the placement box 412. The pressing frame 411 is slidably connected in the sliding groove 405. The desiccant 413 is placed inside the placement box 412.

[0049] As the desiccant 413 absorbs more and more moisture, its weight increases. The increased weight of the desiccant 413 inside the placement box 412 causes the placement box 412 to press down on the support plate 404, compressing the spring 403. The placement box 412 then drives the pressing frame 411 to descend. When the desiccant 413 is saturated, the pressing frame 411 presses down on the push switch 12, thus pressing the push switch 12.

[0050] The pressing frame 411 and the sliding groove 11 cooperate with each other.

[0051] The pressing frame 411 can be slidably inserted into the sliding groove 11.

[0052] The locking and limiting structure 13 includes a pull rope 1301, a second spring 1302, a sliding block 1303, and a locking block 1304. The locking block 1304 is fixedly connected to the side wall of the sliding block 1303. The sliding block 1303 and the locking block 1304 are slidably connected in the second sliding groove 15. The end side wall of the locking block 1304 is inclined. The second spring 1302 is fixedly connected between the sliding block 1303 and the inner side wall of the second sliding groove 15. One end of the pull rope 1301 is fixedly connected to the side wall of the sliding block 1303. The other end of the pull rope 1301 passes through the second spring 1302 and is fixedly connected to the side wall of the baffle 401 by the rope groove 16.

[0053] Pulling the two pull ropes 1301 on both sides first causes the sliding block 1303 to move, compressing the spring 1302. The sliding block 1303 then causes the locking block 1304 to move, causing the locking block 1304 to leave the locking restriction groove 14 and no longer restrict the movement of the moisture-proof structure 4. After the sliding block 1303 slides into the sliding groove 15, it is restricted by the inner side wall of the sliding groove 15 and cannot continue to move. At this time, if the pull rope 1301 is pulled, the pull rope 1301 will pull the baffle 401 to move outward. After the baffle 401 is pulled out of the programmable feedback load box housing 1, the hand can grasp the side wall of the baffle 401 and remove the entire moisture-proof structure 4 from the programmable feedback load box housing 1.

[0054] The snap-fit ​​block 1304 and the snap-fit ​​limiting groove 14 cooperate with each other.

[0055] The snap-fit ​​block 1304 snaps into the snap-fit ​​limiting groove 14 to fix the moisture-proof structure 4.

[0056] In use, all electrical components mentioned in this application are connected to an external power supply and control switch. The heat dissipation groove 3 can assist in heat dissipation inside the programmable feedback load cell housing 1. The desiccant 413 can absorb moisture inside the programmable feedback load cell housing 1 through the ventilation groove 9, thereby better ensuring the dryness inside the programmable feedback load cell housing 1. The baffle 10 can block the desiccant 413 and prevent the desiccant 413 from scattering inside the programmable feedback load cell housing 1.

[0057] As the desiccant 413 absorbs more and more moisture, its weight increases. This increased weight causes the placement box 412 to press down on the support plate 404, compressing the spring 403. The placement box 412 then lowers the pressing frame 411. When the desiccant 413 is saturated, the pressing frame 411 presses down on the push switch 12. Pressing the push switch 12 activates the red warning light 2, alerting staff to determine whether the desiccant 413 is saturated and to replace it promptly.

[0058] When replacing the desiccant 413, pull the two pull ropes 1301 on both sides. The pull ropes 1301 first move the sliding block 1303, compressing the spring 1302. The sliding block 1303 then moves the locking block 1304, causing the locking block 1304 to leave the locking restriction groove 14 and no longer restrict the movement of the desiccant structure 4. After the sliding block 1303 slides into the sliding groove 15, it is restricted by the inner wall of the sliding groove 15 and cannot move further. At this time, continue pulling the pull rope 1301. 1301 will pull the baffle 401 outward. After the baffle 401 is pulled out of the programmable feedback load box housing 1, the hand grasps the side wall of the baffle 401 and takes out the entire moisture-proof structure 4 from the programmable feedback load box housing 1, so as to better replace the desiccant 413 in the placement box 412. After the desiccant 413 is replaced, the moisture-proof structure 4 is slid back into the programmable feedback load box housing 1, and the snap-fit ​​block 1304 snaps into the snap-fit ​​limiting groove 14 again to fix the moisture-proof structure 4.

[0059] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A programmable feedback load, comprising a programmable feedback load box shell (1), a test element (7) is fixedly arranged on the inner side wall of the programmable feedback load box shell (1), characterized in that, Also includes: Moisture-proof structure (4), wherein the moisture-proof structure (4) is disposed inside the programmable feedback load cell housing (1); A snap-fit ​​limiting structure (13) is provided on the moisture-proof structure (4) to fix and limit the moisture-proof structure (4).

2. The programmable regenerative load of claim 1, wherein: A fixing frame (8) is fixedly connected to the inner wall of the programmable feedback load cell housing (1). A ventilation groove (9) is provided on the top side wall of the fixing frame (8). A baffle (10) is fixedly connected to the inner wall of the ventilation groove (9).

3. The programmable regenerative load of claim 1, wherein: The programmable feedback load cell housing (1) has a square through groove (18) and a sliding groove (11) on the front side wall. Two snap-fit ​​limiting grooves (14) are provided on the side walls on both sides of the square through groove (18). A push switch (12) is fixedly connected to the bottom inner side wall of the sliding groove (11).

4. The programmable regenerative load of claim 1, wherein: A red warning light (2) is fixedly connected to the front side wall of the programmable feedback load cell housing (1). The red warning light (2) is electrically connected to the push switch (12). Heat dissipation grooves (3) are provided on the top and side walls of the programmable feedback load cell housing (1). A fixing ring (6) is fixedly connected to the top of the programmable feedback load cell housing (1). A caster wheel (5) is fixedly connected to the bottom side wall of the programmable feedback load cell housing (1).

5. The programmable regenerative load of claim 1, wherein: The moisture-proof structure (4) includes a baffle (401), a fixing plate (402), a spring (403), a support plate (404), and a sliding groove (405). The fixing plate (402) is fixedly connected to the side wall of the baffle (401). The spring (403) is fixedly connected at equal intervals to the top side wall of the fixing plate (402). The support plate (404) is fixedly connected to the top side wall of the spring (403). The baffle (401), the fixing plate (402), and the support plate (404) are slidably connected to the bottom inner side wall of the programmable feedback load cell housing (1) through the square groove (18). The sliding groove (405) is opened in the middle of the side wall of the baffle (401).

6. The programmable regenerative load of claim 5, wherein: The side wall of the baffle (401) is provided with a sliding groove (15) and a rope threading groove (16), the sliding groove (15) and the rope threading groove (16) are connected to each other, and a guide roller (17) is rotatably connected to the side wall of the rope threading groove (16).

7. The programmable regenerative load as described in claim 5, characterized in that: The moisture-proof structure (4) includes a pressing frame (411), a placement box (412), and a desiccant (413). The placement box (412) is placed on top of the support plate (404). The pressing frame (411) is fixedly connected to the side wall of the placement box (412). The pressing frame (411) is slidably connected in the sliding groove (405). The desiccant (413) is placed in the placement box (412).

8. The programmable regenerative load as described in claim 7, characterized in that: The pressing frame (411) and the sliding groove (11) cooperate with each other.

9. The programmable regenerative load as described in claim 1, characterized in that: The locking and limiting structure (13) includes a pull rope (1301), a second spring (1302), a sliding block (1303), and a locking block (1304). The locking block (1304) is fixedly connected to the side wall of the sliding block (1303). The sliding block (1303) and the locking block (1304) are slidably connected in the second sliding groove (15). The end side wall of the locking block (1304) is inclined. The second spring (1302) is fixedly connected between the inner side wall of the sliding block (1303) and the second sliding groove (15). One end of the pull rope (1301) is fixedly connected to the side wall of the sliding block (1303). The other end of the pull rope (1301) passes through the second spring (1302) and the rope groove (16) and is fixedly connected to the side wall of the baffle (401).

10. The programmable regenerative load as described in claim 9, characterized in that: The snap-fit ​​block (1304) and the snap-fit ​​limiting groove (14) cooperate with each other.

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