High pitch door flow characteristic test bench for thermal power unit

Abstract

The utility model provides high control door flow characteristic test bench of thermal power generating unit, including test bench body and accomodation shell. Test bench body includes cable for transmission electrical signal, and the one end of cable is connected with the plug of connectable external device to receive the electrical signal of external device, accomodation shell is located test bench body and is equipped with accomodation subassembly, accomodation subassembly includes installation shaft, accomodation disc and elastic part, installation shaft fixedly connected in accomodation shell, accomodation disc rotatablely sleeved on installation shaft, and elastic part is connected between installation shaft and accomodation disc, cable is wound on the outer circumferential wall of accomodation disc, and the one end of cable away from plug is fixed relative to accomodation disc, and the one end of cable is stretched out accomodation shell with the plug, and cable is configured as accomodation disc can be driven to rotate along the first direction under the pulling of external force, and elastic part occurs elastic deformation and is in the force storage state, when cable is not under external force, and the elastic part under force storage state can drive accomodation disc to rotate along the second direction and wind accomodation cable.

Description

Technical Field

[0001] This utility model relates to the field of thermal power unit testing technology, and in particular to a test bench for the high-speed valve flow characteristics of thermal power units. Background Technology

[0002] During the operation and maintenance of thermal power units, accurate testing of the flow characteristics of high-pressure regulating valves is necessary to ensure safe and efficient operation. The high-pressure regulating valve flow characteristic test bench for thermal power units is an important testing device, whose functions include real-time monitoring of flow data, adjustment of valve status, and evaluation of flow characteristics. However, in existing high-pressure regulating valve flow characteristic test benches for thermal power units, the cables used to transmit test electrical signals are often manually retracted, resulting in low retraction efficiency and affecting the ease of use of the test bench. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a high-voltage flow characteristic test bench for thermal power units, which can automatically wind and store cables with high storage efficiency, thereby improving the ease of use of the test bench.

[0004] To achieve the above objectives, this utility model provides a test bench for the high-voltage regulating valve flow characteristics of thermal power units, comprising: The test bench body includes a cable for transmitting electrical signals, one end of which is connected to a plug configured to connect to an external device to receive electrical signals provided by the external device; A storage shell is disposed on the test bench body. A storage assembly is provided inside the storage shell. The storage assembly includes a mounting shaft, a storage tray, and a first elastic element. The mounting shaft is fixedly connected to the storage shell. The storage tray is rotatably sleeved on the mounting shaft. The first elastic element is connected between the mounting shaft and the storage tray. The cable is wound around the outer periphery of the storage tray, with one end of the cable away from the plug fixed relative to the storage tray, and the end of the cable with the plug extending out of the storage shell. The cable is configured to drive the storage tray to rotate in a first direction under the pull of an external force. The first elastic element is configured to undergo elastic deformation and be in a stored state when the storage tray rotates in the first direction. When the cable is not subjected to the external force, the first elastic element in the stored state can generate an elastic driving force to drive the storage tray to rotate in a second direction to wind and store the cable. The second direction is opposite to the first direction.

[0005] In one embodiment, the thermal power unit high-pressure regulating valve flow characteristic test bench further includes: A fixing component is provided on the storage shell or the test bench body. The fixing component is used to hold the cable to fix the cable after it is extended to the target length.

[0006] In one embodiment, the fixing component is disposed within the storage shell and located on one side of the storage tray, the fixing component comprising: A pair of limiting plates are spaced apart along the axial direction of the mounting shaft, and each limiting plate has a groove on the side facing the other limiting plate; A clamping plate is disposed between the pair of limiting plates. The clamping plate is inserted into the sliding groove of the pair of limiting plates on opposite sides of the mounting shaft along the axial direction. The clamping plate is configured to slide relative to the limiting plates along the sliding groove to clamp or release the cable. The limiting plate and the card plate are provided with a limiting mechanism. The limiting mechanism is configured to limit the relative fixation between the card plate and the limiting plate when the card plate holds the cable, and to allow the card plate to slide relative to the limiting plate along the slide groove to release the cable when the card plate is subjected to external force.

[0007] In one embodiment, the limiting mechanism includes a first limiting member and a second limiting member that cooperates with the first limiting member; The first limiting member includes a first rod, a second rod, and a third rod. The first rod and the second rod are spaced apart along the extension direction of the slide groove and both extend along the axial direction of the mounting shaft. One end of the first rod is connected to the side of the clamping plate opposite to the slide groove. The opposite two ends of the third rod are connected between the other end of the first rod and the end of the second rod near the clamping plate. The second limiting member is a stop block fixedly connected to the limiting plate and disposed in the slide groove. The stop block includes a stop surface, which is located on the side of the stop block near the holding end of the card plate. The holding end is the end of the card plate used to hold the cable. When the clamping end clamps the cable, the end of the second rod away from the clamping plate abuts against the stop surface to limit the clamping plate to be relatively fixed relative to the limiting plate; when the clamping plate is subjected to an external force in the direction away from the cable, at least the second rod undergoes elastic deformation to allow the clamping plate to slide along the groove relative to the limiting plate in the direction away from the cable, so that the clamping plate releases the cable.

[0008] In one embodiment, the end of the second rod away from the card plate is provided with a ball head or a cylindrical head, and abuts against the stop surface through the spherical or cylindrical surface.

[0009] In one embodiment, the plug is detachably fitted onto one end of the cable.

[0010] In one embodiment, the cable has conductors for transmitting electrical signals, at least a portion of which is exposed. The plug includes a plug body, a contact piece, and a quick-release engagement structure. The plug body has a receiving cavity at one axial end, the contact piece is disposed on the inner wall of the receiving cavity, and the quick-release engagement structure is disposed at the end of the plug body. When the plug is fitted onto one end of the cable, at least a portion of the wire core is inserted into the receiving cavity of the plug body and fits against the contact piece, and the quick-release locking structure is locked and fixed to the outer peripheral wall of the cable.

[0011] In one embodiment, a clamp is rotatably connected to the outer wall of the plug, and a second elastic member is connected between one end of the clamp and the outer wall of the plug; The other end of the clamp is configured to clamp the connector when the plug is inserted into the connector of an external device, so that the plug is fixedly electrically connected to the external device.

[0012] In one embodiment, the mounting shaft has a slot, and the first elastic element is a torsion spring sleeved between the mounting shaft and the storage tray. One end of the torsion spring is fixedly engaged in the slot, and the other end of the torsion spring is fixedly connected to the inner wall of the storage tray.

[0013] In one embodiment, the test bench body has a window communicating with its internal cavity, and the test bench body further includes a baffle that can be detachably encapsulated at the window. The storage shell is located inside the test bench body and adjacent to the window; the cable passes through the baffle; and the plug is located outside the test bench body. The cable has a stop ring on its outer peripheral wall near the plug, which is used to stop the cable from abutting against the baffle.

[0014] Compared with the prior art, the high-speed valve flow characteristic test bench for thermal power units provided by this utility model has the following beneficial effects: by winding the cable onto the rotatable storage tray, and setting a first elastic element that can elastically deform to store force between the storage tray and the mounting shaft, the storage tray can be driven to rotate in the opposite direction by the stored force of the first elastic element when the cable is not subjected to external force, thereby realizing the automatic winding and storage of the cable. Compared with the manual method of storing cables with low storage efficiency in the prior art, the cable storage efficiency of this utility model is high, which helps to improve the ease of use of the test bench.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a thermal power unit high-pressure valve flow characteristic test bench provided in one embodiment of this utility model.

[0018] Figure 2 yes Figure 1 The diagram shown is a schematic of the test bench without the baffle, revealing the internal structure of the test bench body.

[0019] Figure 3 yes Figure 2 The diagram shows a partial three-dimensional structure of the storage shell, cable, storage components, and fixing components.

[0020] Figure 4 yes Figure 3 A partial structural diagram of the fixed component is shown.

[0021] Figure 5 yes Figure 3 The cable and plug shown are partially exploded three-dimensional sectional views.

[0022] Figure 6 yes Figure 3 A partial cross-sectional view of the cable and plug connection shown.

[0023] Figure 7 yes Figure 3 The diagram shows the structure of the connector between the plug and the thermal power unit.

[0024] Explanation of key figure labels: 1000-Test bench for high-speed valve flow characteristics of thermal power units; 200-Connecting seat; 201-Connecting groove; 1-Test bench body; 11-Window; 12-Baffle; 2-Cable; 21-Wire core; 22-Insulation protective sleeve; 23-Stop ring; 3-Plug; 30-Plug body; 31-Contact piece; 32-Quick-release locking structure; 33-Clamping plate; 34-Second elastic element; 4-Storage shell; 5-Mounting shaft; 51-Card slot; 6-Storage tray; 7-First elastic element; 8-Fixing component; 81-Limiting plate; 811-Slide groove; 82-Card plate; 821-Card holding end; 822-Card holding groove; 823-Handle; 91-First limiting element; 911-First rod; 912-Second rod; 913-Third rod; 92-Second limiting element; 921-Stop surface; 922-Inclined surface. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] Please combine Figures 1 to 3 One embodiment of this utility model provides a test bench 1000 for the flow characteristics of high-pressure control valves in thermal power units, used to test the hydraulic / pneumatic flow performance of turbine control valves in thermal power units. Specifically, as shown... Figure 1 and Figure 2 As shown, the high-pressure regulating valve flow characteristic test bench 1000 for thermal power units includes a test bench body 1 and a housing 4 disposed on the test bench body 1. The test bench body 1 includes a cable 2 for transmitting electrical signals. One end of the cable 2 is connected to a plug 3, which is configured to connect to external equipment (i.e., a thermal power unit) to receive electrical signals provided by the external equipment. These signals are then transmitted to the test bench body 1 via the cable 2 to perform corresponding tests. The tests include, but are not limited to, real-time monitoring of flow data, adjustment of regulating valve status, and evaluation of flow characteristics. It is easy to understand that, similar to the structure of existing high-pressure regulating valve flow characteristic test benches for thermal power units, in addition to the cable 2, the high-pressure regulating valve flow characteristic test bench 1000 also includes other functional components for flow performance testing, such as, but not limited to, a high-pressure flow meter, a differential pressure sensor, and an automatic control system, which will not be elaborated further.

[0027] In embodiments of this utility model, the storage shell 4 can be disposed inside the test bench body 1 or on the outer wall of the test bench body 1. Figure 2In the example, the storage shell 4 is preferably disposed inside the test bench body 1 to reduce the overall volume of the test bench.

[0028] like Figure 2 and Figure 3 As shown, in an embodiment of this utility model, the storage shell 4 is provided with a storage assembly, which includes a mounting shaft 5, a storage tray 6, and a first elastic element 7. The mounting shaft 5 is fixedly connected to the storage shell 4, the storage tray 6 is rotatably sleeved on the mounting shaft 5, and the first elastic element 7 is connected between the mounting shaft 5 and the storage tray 6; wherein, as... Figure 3 As shown, the cable 2 is wound around the outer peripheral wall of the storage tray 6. The end of the cable 2 away from the plug 3 is fixed relative to the storage tray 6, and the end of the cable 2 with the plug 3 extends out of the storage shell 4 to connect to the aforementioned external device through the plug 3. The cable 2 is configured to be able to drive the storage tray 6 in a first direction (e.g., under the pull of an external force (e.g., human force)). Figure 3 The cable 2 wound on the storage tray 6 is rotated (clockwise as shown) so that the plug 3 at the end of the cable 2 can be released and unwound to connect to the external device. The first elastic element 7 is configured to elastically deform and be in a stored state when the storage tray 6 rotates in the first direction. When the cable 2 is not subjected to the external force, that is, when the cable 2 is not pulled by human force and the plug 3 is disconnected from the external device, the first elastic element 7 in the stored state can generate an elastic driving force to drive the storage tray 6 in the second direction (e.g., clockwise). Figure 3 The cable 2 is wound and stored by rotating in a counterclockwise direction (as shown), and the second direction is opposite to the first direction.

[0029] In the high-voltage valve flow characteristic test bench 1000 for thermal power units provided in the embodiments of this utility model, by winding the cable 2 onto the rotatable storage tray 6, and providing a first elastic element 7 that can elastically deform to store force between the storage tray 6 and the mounting shaft 5, the storage tray 6 can be driven to rotate in the opposite direction by the stored force of the first elastic element 7 when the cable 2 is not subjected to external force, thereby achieving automatic winding and storage of the cable 2. Compared with the manual method of storing cables in the prior art, which has low storage efficiency, the cable 2 in this utility model has high storage efficiency, which is beneficial to improving the ease of use of the high-voltage valve flow characteristic test bench 1000 for thermal power units. Furthermore, the storage components inside the storage shell 4 can realize the organization and storage of the cable 2, thereby facilitating use and maintenance during testing and improving the practicality of the test bench.

[0030] It should be noted that, in the embodiments of this utility model, the storage shell 4 has a through structure (not limited to a through hole or opening) through which both ends of the cable 2 pass. The first elastic member 7 can be implemented in various ways to achieve elastic deformation and store force to generate a driving force to drive the storage tray 6 to rotate. The following will combine... Figures 1 to 7 The structure of the thermal power unit high-pressure valve flow characteristic test bench 1000 provided in one embodiment of the present invention will be described in further detail.

[0031] For specific details, please refer to... Figure 1 and Figure 2 In one embodiment of this utility model, the test bench body 1 is generally cabinet-shaped. The test bench body 1 has a window 11 communicating with its internal cavity. The test bench body 1 also includes a baffle 12 detachably encapsulated at the window 11. The baffle 12 has a through hole communicating with the internal cavity of the test bench body 1 and the external space. The test bench body 1 is preferably equipped with casters and handrails to facilitate the movement of the thermal power unit high-pressure valve flow characteristic test bench 1000 to any test location by the test personnel. It is understood that, similar to the structure of existing test benches, the aforementioned high-pressure flow meter, differential pressure sensor, automatic control system and other components are housed inside the test bench body 1. The specific structure will not be described in detail here.

[0032] like Figure 1 and Figure 2 As shown, in one embodiment of this utility model, the storage shell 4 is disposed inside the test bench body 1 and adjacent to the window 11, and the side of the storage shell 4 facing the window 11 has an opening. The cable 2 passes through the opening and is threaded through the through hole of the baffle 12. The plug 3 is located outside the test bench body 1 to facilitate connection to external equipment such as thermal power units. In this embodiment, placing the storage shell 4 inside the test bench body 1 not only reduces the overall volume of the test bench but also helps protect the storage shell 4, the aforementioned storage components disposed inside the storage shell 4, and the portion of the cable 2 housed within the storage shell 4. It is understood that by movably threading the cable 2 through the through hole of the baffle 12 and exposing the plug 3 outside the test bench body 1, when it is necessary to electrically connect the plug 3 to external equipment such as thermal power units, the tester only needs to pull the cable 2 to wind it around the storage reel 6 (see Figure 3The cable 2 is unfurled to a sufficient length to ensure that the plug 3 can connect to the external device for flow characteristic testing. After the characteristic test is completed, the tester simply disconnects the plug 3 from the external device and releases the tension on the cable 2. The first elastic element 7, in its stored state, then drives the storage tray 6 to rotate and automatically wind and store the cable 2. Throughout the testing process, the operation of the cable 2 is simple and quick.

[0033] Preferably, such as Figure 1 and Figure 4 As shown, in one embodiment of this utility model, a stop ring 23 is provided on the outer peripheral wall of the portion of the cable 2 adjacent to the plug 3. The stop ring 23 is used to stop the cable from abutting against the baffle 12. By providing the stop ring 23 on the outer peripheral wall of the cable 2, the stop ring 23 can prevent the cable 2 from being excessively stretched and entering the storage shell 4 during winding and storing, thus preventing entanglement. This ensures that the cable 2 can be smoothly unwound and stored. At the same time, it can also prevent the plug 3 from directly colliding with the baffle 12, avoiding damage or loosening of the plug 3 and improving the reliability of the plug 3. The stop ring 23 can be a circular ring, an elliptical ring, or multiple arc-shaped rings, and is not limited thereto.

[0034] For further details, please refer to the following: Figure 3 In one embodiment of this utility model, the mounting shaft 5 has a slot 51, and the first elastic element 7 is a torsion spring sleeved between the mounting shaft 5 and the storage tray 6. One end of the torsion spring is fixedly engaged in the slot 51, and the other end of the torsion spring is fixedly connected to the inner wall of the storage tray 6. Thus, when the cable 2 is unfurled under external force, causing the storage tray 6 to rotate in a first direction, the torsion spring is elastically deformed by the storage tray 6, thereby storing force. When the cable 2 is released and no longer subject to external force, the torsion spring can drive the storage tray 6 to rotate in a second direction opposite to the first direction, thereby winding and storing the cable 2. In this embodiment, the first elastic element 7 is a torsion spring connecting the mounting shaft 5 and the storage tray 6, which has a simple overall structure, is easy to manufacture and install, and can provide stable torque support during the storage and unwinding of the cable 2. The slot 51 can be located at the end of the mounting shaft 5 or between the two ends of the mounting shaft 5, and there is no limitation thereto.

[0035] In other embodiments of this utility model, the first elastic element 7 can also be other forms of elastic element, as long as it can store force through elastic deformation. For example, in one possible implementation, the first elastic element 7 can be a rubber band or rubber strip, with the opposite ends of the rubber band or rubber strip connected to the mounting shaft 5 and the storage tray 6 respectively. When the storage tray 6 rotates in the first direction, the rubber band or rubber strip is stretched and wound around the mounting shaft 5, thereby storing force. When the cable 2 is released, the stored rubber band or rubber strip can also drive the storage tray 6 to rotate in the second direction and wind and store the cable 2.

[0036] Furthermore, please combine Figure 3 and Figure 4 In one embodiment of this utility model, the high-voltage valve flow characteristic test bench 1000 for thermal power units further includes a fixing component 8 disposed on the storage shell 4. The fixing component 8 is used to hold the cable 2 to fix the cable 2 after it has been extended to the target length. In this embodiment, by setting the fixing component 8 to hold the cable 2 at different parts, the cable 2 is fixed after it has been extended to the target length. This not only allows the extension length of the cable 2 to be adjusted so that the cable 2 can be pulled out to a suitable length to adapt to different usage scenarios, but also ensures that the cable 2 will not shake during use, improving the reliability of the connection between the plug 3 at the end of the cable 2 and the external device. Furthermore, it is understood that compared to fixing the cable 2 through the connection between the plug 3 and the external device, the plug 3 is prone to fatigue damage and loosening due to the pulling of the first elastic element 7. By fixing the cable 2 with the fixing component 8, damage and loosening of the plug 3 can be avoided, which helps to extend the life of the plug 3.

[0037] Specifically, in Figure 3 and Figure 4 In the example, the fixing component 8 is disposed inside the storage shell 4 and located on one side of the storage tray 6 (the side closer to the plug 3). The fixing component 8 includes a pair of limiting plates 81 and a retaining plate 82. The pair of limiting plates 81 are spaced apart along the axial direction of the mounting shaft 5. Each limiting plate 81 has a groove 811 on the side facing the other limiting plate 81. The groove 811 extends perpendicularly or substantially perpendicular to the unfolding direction of the cable 2 (i.e., along...). Figure 3(Extending roughly vertically as shown); the clamping plate 82 is disposed between the pair of limiting plates 81, and the clamping plate 82 is inserted into the grooves 811 of the pair of limiting plates 81 on opposite sides of the mounting shaft 5 along the axial direction. The clamping plate 82 is configured to slide relative to the limiting plate 81 along the grooves 811 to clamp or release the cable 2. It should be noted that a limiting mechanism is provided between the limiting plate 81 and the clamping plate 82. The limiting mechanism is configured to limit the relative fixation between the clamping plate 82 and the pair of limiting plates 81 when the clamping plate 82 clamps the cable 2, thereby ensuring that the cable 2 is fixed. When the clamping plate 82 is subjected to external force, the limiting mechanism allows the clamping plate 82 to slide relative to the limiting plate 81 along the grooves 811 to release the cable 2, so that the cable 2 can move freely. In this embodiment, the fixing component 8 is composed of the pair of limiting plates 81 and the locking plate 82. The overall structure is simple and easy to manufacture and install. Furthermore, the pair of limiting plates 81 are symmetrically arranged and fixedly connected inside the storage shell 4, which improves the stability and reliability of the overall structure.

[0038] More specifically, in Figure 3 and Figure 4 In the example, the limiting mechanism includes a first limiting member 91 and a second limiting member 92 that cooperates with the first limiting member 91; the first limiting member 91 has a Z-shaped structure and includes a first rod 911, a second rod 912, and a third rod 913. The first rod 911 and the second rod 912 are spaced apart along the extension direction of the slide groove 811 and both extend along the axial direction of the mounting shaft 5. One end of the first rod 911 is connected to the slot 82 opposite to the slide groove 811. On one side, the opposite ends of the third rod 913 are connected between the other end of the first rod 911 and the end of the second rod 912 near the clamping plate 82; the second limiting member 92 is a stop block fixedly connected to the limiting plate 81 and disposed in the slide groove 811, the stop block includes a stop surface 921, the stop surface 921 is located on the side of the stop block near the clamping end 821 of the clamping plate 82, the clamping end 821 is the end of the clamping plate 82 used to clamp the cable 2 (i.e. Figure 4 (as shown at the top); wherein, when the clamping end 821 clamps the cable 2, the end of the second rod 912 away from the clamping plate 82 abuts against the stop surface 921 to limit the clamping plate 82 to be relatively fixed relative to the limiting plate 81, ensuring that the clamping plate 82 can clamp and fix the cable 2; when the clamping plate 82 is subjected to an external force in the direction away from the cable 2, that is, subjected to Figure 4When a downward external force is applied, since the first limiting member 91 is suspended at one end and connected to the clamping plate 82, as the first limiting member 91 moves away from the cable 2 relative to the stop block under the action of the clamping plate 82, at least the second rod 912 can undergo elastic deformation under the stopping action of the stop surface 921. The end of the second rod 912 away from the clamping plate 82 deforms towards the cable 2, allowing the clamping plate 82 to slide along the slide groove 811 relative to the limiting plate 81 away from the cable 2, so that the clamping plate 82 releases the cable 2, and the cable 2 can then move freely. In this embodiment, the limiting mechanism adopts a combination of the first limiting member 91 and the second limiting member 92, which has a simple overall structure and is easy to manufacture. Optionally, the first limiting member 91 and the clamping plate 82 can be integrally formed, or they can be formed separately and then connected as one piece.

[0039] Preferably, in Figure 4 In the example, a first limiting member 91 and a corresponding second limiting member 92 are provided on each of the opposite sides of the card plate 82. By symmetrically providing the limiting mechanism on both sides of the card plate 82, the fixing effect of the card plate 82 on the cable 2 can be enhanced, and the smoothness of the card plate 82 during sliding can be improved. Of course, in other embodiments of this utility model, the first limiting member 91 and the second limiting member 92 can be provided only on one side of the card plate 82 to simplify the overall structure.

[0040] Preferably, in Figure 4 In the example, the stop surface 921 is a plane perpendicular to the sliding direction of the clamping plate 82. By designing the stop surface 921 as a plane, compared to an inclined plane extending away from the cable 2, the planar stop surface 921 can provide greater support force to the second rod 912 while ensuring that the second rod 912 undergoes elastic deformation, thus ensuring the reliability of the clamping plate 82 in holding and fixing the cable 2.

[0041] Optionally, such as Figure 4 As shown, in an embodiment of this utility model, the extending direction of the third rod 913 can form an angle with the sliding direction of the clamping plate 82 (i.e., the extending direction of the groove 811). This design can improve the elastic deformation capability of the first limiting member 91, allowing the first limiting member 91 to provide greater movement space for the sliding of the clamping plate 82 due to elastic deformation. This, in turn, allows the clamping plate 82 to leave a larger gap with the cable 2, making it easier to wind or unwind the cable 2. Specifically, in Figure 4In the example, when the clamping plate 82 slides away from the cable 2 under the action of an external force, the second rod 912 of the first limiting member 91 undergoes elastic deformation until the second rod 912 warps and slides along the surface of the second limiting member 92 (i.e., the stop block) to the side of the second limiting member 92 away from the cable 2. At this time, the clamping plate 82 has a large sliding stroke, which makes the gap between the clamping plate 82 and the cable 2 larger, making it easier for the cable 2 to move during the winding or unwinding process. In this embodiment, when it is necessary to hold and fix the cable 2 by the clamping plate 82, it is only necessary to operate the clamping plate 82 to slide towards the cable 2. During this process, the second rod 912 can also undergo elastic deformation. The second rod 912 deforms and slides along the surface of the second limiting member 92 to the side of the second limiting member 92 closer to the cable 2, until the holding end 821 of the clamping plate 82 clamps the cable 2. At this time, the second rod 912 abuts against the stop surface 921. Preferably, in this embodiment, the side of the second limiting member 92 away from the cable 2 can be set as an inclined surface 922 extending in the direction closer to the cable 2, that is, the stop block is roughly wedge-shaped. This helps to reduce the resistance of the second rod 912 sliding along the surface of the second limiting member 92, so that the second rod 912 slides to the side of the second limiting member 92 closer to the cable 2 more quickly, thereby facilitating the clamping plate 82 to quickly clamp the cable 2.

[0042] Of course, in other embodiments of this utility model, the extension direction of the third rod 913 can be approximately the same as the sliding direction of the card plate 82 (i.e., the extension direction of the groove 811), and the second rod 912 can also be set to undergo elastic deformation but not slide to the side of the second limiting member 92 away from the cable 2, as long as it is ensured that the card plate 82 can fix the cable 2 by sliding and holding or release the cable 2, and there is no limitation in this regard.

[0043] Preferably, in Figure 4 In the example, the end of the second rod 912 away from the stop plate 82 is provided with a ball head or a cylindrical head 914, and abuts against the stop surface 921 through the spherical or cylindrical surface. This can reduce the contact area between the second rod 912 and the stop surface 921, so that the second rod 912 can slide more smoothly and improve the sliding smoothness of the stop plate 82.

[0044] Preferably, in Figure 4In the example, the holding end 821 is provided with a holding groove 822 with a notch structure. When the holding plate 82 holds the cable 2, at least a portion of the cable 2 is accommodated in the holding groove 822. This design helps to improve the holding effect of the holding plate 82 on the cable 2 and further prevents the cable 2 from shaking.

[0045] Optionally, please combine Figure 1 and Figure 4 In one embodiment of this utility model, the card plate 82 may also be provided with a handle 823, and the baffle 12 has a through hole for the handle 823 to pass through. The tester can use the exposed handle 823 to control the card plate 82 to slide to hold and fix the cable 2 or release the cable 2, which improves the ease of operation for the personnel.

[0046] Please combine Figure 3 , Figures 5 to 7 In one embodiment of this utility model, the plug 3 is preferably detachably sleeved on one end of the cable 2. By detachably sleeved on the end of the cable 2, it is beneficial to achieve a quick connection between the cable 2 and the plug 3.

[0047] Specifically, such as Figure 5 and Figure 6 As shown, in one embodiment of this utility model, the cable 2 is provided with a wire core 21 for transmitting electrical signals and an insulating protective sleeve 22 wrapped around the wire core 21, at least a portion of the wire core 21 being exposed outside the insulating protective sleeve 22; the plug 3 includes a plug body 30, a contact piece 31, and a quick-release engaging structure 32, the plug body 30 having a receiving cavity at one axial end (the end near the cable 2), the contact piece 31 being disposed on the inner wall of the receiving cavity, and the quick-release engaging structure 32 being disposed at the end of the plug body 30; when the plug 3 is fitted with When the plug 3 is located at one end of the cable 2, at least a portion of the core 21 is inserted into the receiving cavity of the plug body 30 and abuts against the contact piece 31. The quick-release locking structure 32 is locked and fixed to the outer peripheral wall of the cable 2 to ensure that the plug 3 is reliably fitted onto the end of the cable 2, ensuring that the core 21 and the contact piece 31 remain tightly fitted, thereby achieving electrical connection between the core 21 and the plug 3, ensuring that the electrical signal acquired by the plug 3 can be transmitted through the core 21 of the cable 2, and ensuring accurate data transmission during the flow characteristic test. The quick-release locking structure 32 can be an existing quick-release locking structure such as an elastic card, as long as the quick-release locking structure 32 can engage with the cable 2 to prevent accidental loosening during the connection of the plug 3; further details are omitted.

[0048] Furthermore, please combine Figures 5 to 7 In one embodiment of the present invention, a clamping plate 33 is rotatably connected to the outer wall of the plug 3, and a second elastic member 34 is connected between one end of the clamping plate 33 and the outer wall of the plug 3; the other end of the clamping plate 33 is configured to clamp the connector 200 (e.g., clamp the annular connecting groove 201 of the connector 200) when the plug 3 is inserted into the connector 200 of the external device, so that the plug 3 is fixedly electrically connected to the external device. In this embodiment, the plug 3 is connected to the connector 200 of the external device via a plug-in connection, which is simple and quick. When the plug 3 is connected to the connector 200, it is simultaneously clamped to the connector 200 by the clamping plate 33, enhancing the reliability of the connection between the plug 3 and the connector 200 and ensuring the plug 3 remains stable during use, preventing displacement due to external forces. Furthermore, a second elastic element 34 is provided between the plug 3 and the clamping plate 33. The second elastic element 34 provides elastic support, making the connection between the plug 3 and the clamping plate 33 more flexible. The second elastic element 34 creates an adaptive connection between the plug 3 and the clamping plate 33, which can buffer external impact forces and ensure the reliability and durability of the connection. The second elastic element 34 can be, but is not limited to, a spring or a rubber ring; in this embodiment, a spring is used.

[0049] It is understood that in other embodiments of this utility model, the plug 3 can also be quickly connected to the external device in other ways, such as, but not limited to, magnetic connection, threaded connection, etc., and there is no limitation thereto.

[0050] The working principle of the thermal power unit high-voltage valve flow characteristic test bench 1000 provided in the embodiments of this utility model is as follows: When using the high-pressure regulating valve flow characteristic test bench 1000 for thermal power units, firstly, the handle 823 is used to control the clamping plate 82 to slide downward within the limiting plate 81, separating the clamping plate 82 from the cable 2, allowing the cable 2 to move freely. Then, the cable 2 is pulled out from the storage shell 4, causing the cable 2 to drive the storage tray 6 to rotate, which in turn causes the storage tray 6 to drive the first elastic element 7 (i.e., torsion spring) to twist and store force. After the cable 2 is fully extended, the clamping plate 82 is slid upward within the limiting plate 81 and lifted. The clamping plate 82 then... The second rod 912 of the first limiting member 91 slides to the stop surface 921 at the top of the second limiting member 92 (i.e., the stop block), so that the second rod 912 abuts and is fixed to the stop surface 921. Then, the clamping end 821 of the clamping plate 82 clamps and squeezes the cable 2 to fix the cable 2. When the cable 2 needs to be stored, the clamping plate 82 is pushed down to release the cable 2. Then, the storage tray 6 is rotated to store the cable 2 through the reset of the torsion spring, which achieves the effect of facilitating automatic winding and storage of the cable 2. When it is necessary to quickly connect the plug 3 to the cable 2, simply place the plug 3 directly onto the outer wall of the cable 2, so that the contact piece 31 inside the plug 3 fits against the wire core 21 inside the cable 2. Then, engage and lock the quick-release locking structure 32 of the plug 3 with the outer wall of the cable 2 to achieve a quick connection between the plug 3 and the cable 2. When it is necessary to connect the plug 3 to external equipment (thermal power unit), pinch the clamp 33 to open it, and at the same time, insert the plug body 30 of the plug 3 into the connection seat 200 of the thermal power unit. After releasing the clamp 33, the tension of the second elastic element 34 (e.g., spring) supports and drives one side of the clamp 33 to engage and lock in the connection groove 201 of the connection seat 200, thereby achieving a quick and stable connection between the plug 3 and the thermal power unit.

[0051] In the description of this utility model, the terms "embodiment," "specific embodiment," "example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A test bench (1000) for the flow characteristics of a high-voltage control valve in a thermal power unit, characterized in that, include: The test bench body (1) includes a cable (2) for transmitting electrical signals, one end of which is connected to a plug (3), which is configured to connect to an external device to receive electrical signals provided by the external device; A storage shell (4) is provided on the test bench body (1). The storage shell (4) is provided with a storage component. The storage component includes a mounting shaft (5), a storage tray (6) and a first elastic element (7). The mounting shaft (5) is fixedly connected to the storage shell (4). The storage tray (6) is rotatably sleeved on the mounting shaft (5). The first elastic element (7) is connected between the mounting shaft (5) and the storage tray (6). The cable (2) is wound around the outer periphery of the storage tray (6). The end of the cable (2) away from the plug (3) is fixed relative to the storage tray (6), and the end of the cable (2) with the plug (3) extends out of the storage shell (4). The cable (2) is configured to drive the storage tray (6) to rotate in a first direction under the pull of an external force. The first elastic element (7) is configured to undergo elastic deformation and be in a stored state when the storage tray (6) rotates in the first direction. When the cable (2) is not subjected to the external force, the first elastic element (7) in the stored state can generate an elastic driving force to drive the storage tray (6) to rotate in a second direction and wind and store the cable (2). The second direction is opposite to the first direction.

2. The thermal power unit high-voltage valve flow characteristic test bench (1000) as described in claim 1, characterized in that, Also includes: A fixing component (8) is provided on the storage shell (4) or the test bench body (1). The fixing component (8) is used to hold the cable (2) to fix the cable (2) after it has been extended to the target length.

3. The thermal power unit high-voltage valve flow characteristic test bench (1000) as described in claim 2, characterized in that, The fixing component (8) is disposed inside the storage shell (4) and located on one side of the storage tray (6), and the fixing component (8) includes: A pair of limiting plates (81) are spaced apart along the axial direction of the mounting shaft (5), and each of the limiting plates (81) has a groove (811) on the side facing the other limiting plate (81). A retaining plate (82) is disposed between the pair of limiting plates (81). The retaining plate (82) is inserted into the groove (811) of the pair of limiting plates (81) on opposite sides of the mounting shaft (5) in the axial direction. The retaining plate (82) is configured to slide relative to the limiting plate (81) along the groove (811) to retain or release the cable (2). A limiting mechanism is provided between the limiting plate (81) and the clamping plate (82). The limiting mechanism is configured to limit the relative fixation between the clamping plate (82) and the limiting plate (81) when the clamping plate (82) clamps the cable (2), and to allow the clamping plate (82) to slide relative to the limiting plate (81) along the slide groove (811) to release the cable (2) when the clamping plate (82) is subjected to external force.

4. The thermal power unit high-voltage valve flow characteristic test bench (1000) as described in claim 3, characterized in that, The limiting mechanism includes a first limiting member (91) and a second limiting member (92) that cooperates with the first limiting member (91). The first limiting member (91) includes a first rod (911), a second rod (912) and a third rod (913). The first rod (911) and the second rod (912) are spaced apart along the extension direction of the slide groove (811) and both extend along the axial direction of the mounting shaft (5). One end of the first rod (911) is connected to the side of the clamping plate (82) facing the slide groove (811). The opposite two ends of the third rod (913) are connected between the other end of the first rod (911) and the end of the second rod (912) near the clamping plate (82). The second limiting member (92) is a stop block fixedly connected to the limiting plate (81) and disposed in the slide groove (811). The stop block includes a stop surface (921). The stop surface (921) is located on one side of the stop block near the holding end (821) of the card plate (82). The holding end (821) is one end of the card plate (82) used to hold the cable (2). When the holding end (821) holds the cable (2), the end of the second rod (912) away from the card plate (82) abuts against the stop surface (921) to limit the card plate (82) to be relatively fixed relative to the limiting plate (81); when the card plate (82) is subjected to an external force in a direction away from the cable (2), at least the second rod (912) undergoes elastic deformation to allow the card plate (82) to slide along the groove (811) relative to the limiting plate (81) in a direction away from the cable (2), so that the card plate (82) releases the cable (2).

5. The thermal power unit high-voltage valve flow characteristic test bench (1000) as described in claim 4, characterized in that, The second rod (912) has a ball head or cylindrical head (914) at one end away from the card plate (82), and abuts against the stop surface (921) through the ball surface or cylindrical surface.

6. The thermal power unit high-voltage valve flow characteristic test bench (1000) as described in any one of claims 1 to 5, characterized in that, The plug (3) is detachably fitted onto one end of the cable (2).

7. The thermal power unit high-voltage valve flow characteristic test bench (1000) as described in claim 6, characterized in that, The cable (2) is provided with a core (21) for transmitting electrical signals, at least a portion of which is exposed. The plug (3) includes a plug body (30), a contact piece (31) and a quick-release engagement structure (32). The plug body (30) has an accommodating cavity at one end in the axial direction. The contact piece (31) is located on the inner wall of the accommodating cavity. The quick-release engagement structure (32) is located at the end of the plug body (30). When the plug (3) is fitted onto one end of the cable (2), at least a portion of the wire core (21) is inserted into the receiving cavity of the plug body (30) and fits against the contact piece (31), and the quick-release locking structure (32) is locked and fixed to the outer peripheral wall of the cable (2).

8. The thermal power unit high-voltage valve flow characteristic test bench (1000) as described in claim 7 or any one of 1 to 5, characterized in that, The outer wall of the plug (3) is rotatably connected to a clamp (33), and a second elastic element (34) is connected between one end of the clamp (33) and the outer wall of the plug (3). The other end of the clamp (33) is configured to clamp the connector when the plug (3) is inserted into the connector (200) of the external device, so that the plug (3) is fixedly electrically connected to the external device.

9. The thermal power unit high-voltage valve flow characteristic test bench (1000) as described in any one of claims 1 to 5, characterized in that, The mounting shaft (5) has a slot (51), and the first elastic element (7) is a torsion spring sleeved between the mounting shaft (5) and the storage tray (6). One end of the torsion spring is fixedly engaged in the slot (51), and the other end of the torsion spring is fixedly connected to the inner wall of the storage tray (6).

10. The thermal power unit high-voltage valve flow characteristic test bench (1000) as described in any one of claims 1 to 5, characterized in that, The test bench body (1) has a window (11) communicating with its inner cavity, and the test bench body (1) also includes a baffle (12) that can be detachably encapsulated at the window (11). The storage shell (4) is located inside the test bench body (1) and adjacent to the window (11), the cable (2) passes through the baffle (12), and the plug (3) is located outside the test bench body (1). Among them, a stop ring (23) is provided on the outer peripheral wall of the portion of the cable (2) adjacent to the plug (3), and the stop ring (23) is used to stop the abutment against the baffle (12).

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