Pressure control and contact signal acquisition equipment
By designing pressure control and contact signal acquisition equipment, the node air pressure and signal acquisition of the density relay are automatically controlled, which solves the problems of low manual debugging efficiency and unquantifiable test accuracy of the density relay, and achieves efficient and accurate automatic testing.
Patent Information
- Application Number
- CN202420267039.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-02-02
AI Technical Summary
During the debugging process of density relay, the manual operation efficiency is low, the test accuracy cannot be quantified, and data recording relies on handwriting, making management inconvenient.
Design a pressure control and contact signal acquisition equipment, including a frame structure, a pressure output device and a control unit. It outputs the preset node pressure through automatic control and collects the node signal of the density relay to achieve automatic testing.
It improves the testing efficiency and testing accuracy of density relays, reduces the uncertainty of manual operations, and makes data recording more accurate and easier to manage.
Smart Images
Figure CN222365064U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of density relay testing, in particular to a pressure control and contact signal acquisition device. Background Art
[0002] Density relays are widely used in SF6 electrical engineering equipment such as high-voltage circuit breakers, high-voltage transformers, and high-power transformers to monitor and control the density of SF6 gas in the sealed container of SF6 electrical engineering equipment. If the density relay fails, it will cause great economic losses. To ensure the reliability of circuit breaker operation, it is necessary to frequently monitor the various indicators of the density relay, especially SF6 gas, which must meet the requirements of relevant standards to keep the SF6 density relay in good working condition for a long time.
[0003] The density of SF6 gas is an important indicator of insulation and arc extinguishing of SF6 electrical engineering equipment. Therefore, the correctness and reliability of the indication and contact value of the SF6 density relay are related to whether the SF6 electrical engineering equipment can operate normally and safely on the national power grid. In the existing density relay, two micro switches are generally set as switches to monitor the working status, and two trigger rods of different heights are used to trigger the micro switches. Different micro switches can trigger different functions of the density relay. For example, when the pressure drops to a preset value, one of the micro switches sends a signal to trigger an alarm; when the pressure continues to drop, one of the micro switches sends a signal to trigger the cabinet to lock.
[0004] Therefore, during the debugging process of the density relay, it is necessary to ensure that when the pressure inside the density relay reaches the preset pressure node, the corresponding micro switch can be triggered and the density relay can send the corresponding node signal. The above work of the existing production line is generally completed manually. This position not only has high requirements on employee capabilities, but also has relatively low labor efficiency. In addition, the test accuracy varies from person to person and cannot be quantified. Data records mainly rely on handwritten records, which are not easy to manage. Utility Model Content
[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a pressure control and contact signal acquisition device to solve the problems of low efficiency and unquantifiable test accuracy during manual debugging of density relays in the prior art density relays.
[0006] In order to solve the above technical problems, the utility model provides a pressure control and contact signal acquisition device for testing a density relay, comprising:
[0007] A frame structure, the frame structure comprising an inner cavity for accommodating various electrical devices, the frame structure being provided with a signal interface, an air source inlet and an air source outlet;
[0008] A pressure output device, the pressure output device is arranged in the inner cavity and is connected to the gas source inlet and the gas source outlet through a ventilation pipeline;
[0009] A control unit, which is disposed in the inner cavity and is electrically connected to the pressure output device and the signal interface;
[0010] The air source inlet is connected to the air source, the air source outlet is connected to the air inlet of the density relay to be measured, the node signal line of the density relay to be measured is connected to the signal interface, and the control unit is used to control the pressure output device to output a preset node air pressure, and at the same time detect whether the density relay to be measured sends a corresponding node signal.
[0011] As a more preferred manner, the signal interface includes multiple types, and each type of signal interface includes multiple types, so as to simultaneously meet the test of multiple different types of density relays, thereby further improving the test efficiency of the density relay.
[0012] As a more preferred method, the pressure control and contact signal acquisition equipment also includes a gas source distributor, which connects the gas source outlet with the gas source distributor, and connects with multiple density relays to be tested through the gas source distributor to simultaneously meet the testing of multiple density relays, thereby further improving the testing efficiency of the density relays.
[0013] As a more preferred manner, rollers are provided at the bottom of the frame structure to facilitate the movement of the pressure control and contact signal acquisition device and to make it more convenient to use the pressure control and contact signal acquisition device.
[0014] As a more preferred embodiment, the control unit further comprises a signal acquisition card, which is connected to the signal interface. The signal acquisition card can convert the analog signal emitted by the density relay to be measured into a digital signal and then transmit it to the control unit.
[0015] As a more preferred method, the control unit adopts a computer host, which is used to receive and record the corresponding node signal of the density relay to be tested. Different from traditional manual recording, automatic recording using a computer host greatly saves manpower, and the recorded data is also more accurate and detailed.
[0016] As a more preferred embodiment, the pressure control and contact signal acquisition equipment also includes a display device arranged on the outside of the frame structure, and the display device is connected to the computer host to facilitate the test personnel to observe the operating status of the pressure control and contact signal acquisition equipment in real time.
[0017] As a more preferred embodiment, the pressure control and contact signal acquisition device also includes an input device arranged on the outside of the frame structure, and the input device is electrically connected to the computer host to facilitate the interaction between the tester and the pressure control and contact signal acquisition device.
[0018] As a more preferred manner, the input device is a keyboard and a mouse. Using a keyboard and a mouse as an input device is simple and easy to obtain and replace.
[0019] As a more preferred method, the pressure control and contact signal acquisition device also includes a battery assembly, which ensures that the pressure control and contact signal acquisition device can be used without a power source, thereby expanding the usage scenarios.
[0020] As described above, the pressure control and contact signal acquisition equipment of the utility model has the following beneficial effects: when the pressure control and contact signal acquisition equipment of the utility model is in use, the gas source inlet is connected to the gas source, the gas source outlet is connected to the gas inlet of the density relay to be measured, and the node signal line of the density relay to be measured is connected to the signal interface, and then the control unit controls the pressure output device to output a preset node air pressure, and at the same time detects whether the density relay to be measured sends a corresponding node signal; in the above-mentioned entire test process, the pressure control and contact signal acquisition equipment of the utility model is automatically completed by the control unit, compared with the traditional density relay that is manually completed, the test efficiency is higher and the test accuracy consistency is better, and the pressure control and contact signal acquisition equipment of the utility model utilizes universal interfaces such as gas source inlet, gas source outlet and signal interface, which further facilitates the wiring work and improves efficiency.
[0021] To sum up, the pressure control and contact signal acquisition equipment of the utility model realizes automatic testing of the density relay by controlling the output of the preset node air pressure and collecting the node signal of the density relay, thereby solving the problems of low efficiency and unquantifiable test accuracy in the manual debugging process of the density relay in the prior art density relay. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 Shown is a schematic diagram of the pressure control and contact signal acquisition device of the utility model.
[0023] Component number description
[0024] 1 Framework structure
[0025] 11 Signal interface
[0026] 12 Air source inlet
[0027] 13 Air source outlet
[0028] 2 Pressure output device
[0029] 3. Computer host
[0030] 4 Display device
[0031] 5. Keyboard and Mouse
[0032] 6 Rollers DETAILED DESCRIPTION
[0033] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0034] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terms used here are only for describing specific embodiments and are not intended to limit this application. Spatial related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., can be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.
[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "hold" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0036] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions or operations is inherently mutually exclusive in some way.
[0037] As shown in the figure, the utility model provides a pressure control and contact signal acquisition device for testing a density relay, including:
[0038] A frame structure 1, wherein the frame structure 1 includes an inner cavity for accommodating various electrical devices, and the frame structure 1 is provided with a signal interface 11, an air source inlet 12, and an air source outlet 13;
[0039] A pressure output device 2, wherein the pressure output device 2 is disposed in the inner cavity and is connected to the gas source inlet 12 and the gas source outlet 13 through a ventilation pipeline;
[0040] A control unit, which is disposed in the inner cavity and is electrically connected to the pressure output device 2 and the signal interface 11;
[0041] The gas source inlet 12 is connected to the gas source, the gas source outlet 13 is connected to the gas inlet of the density relay to be measured, and the node signal line of the density relay to be measured is connected to the signal interface 11. Then the control unit controls the pressure output device 2 to output the preset node air pressure, and detects whether the density relay to be measured sends a corresponding node signal.
[0042] In order to better introduce the pressure control and contact signal acquisition equipment of the utility model, it is now further explained in combination with the following specific applications. When the pressure control and contact signal acquisition equipment of the utility model is in use, the gas source inlet 12 is connected to the gas source, the gas source outlet 13 is connected to the gas inlet of the density relay to be measured, and the node signal line of the density relay to be measured is connected to the signal interface 11. Then the control unit controls the pressure output device 2 to output a preset node air pressure, and at the same time detects whether the density relay to be measured sends a corresponding node signal; in the above-mentioned entire test process, the pressure control and contact signal acquisition equipment of the utility model is automatically completed by the control unit, compared with the traditional density relay that is manually completed, the efficiency is higher and the test accuracy consistency is better, and the pressure control and contact signal acquisition equipment of the utility model utilizes universal interfaces such as the gas source inlet 12, the gas source outlet 13 and the signal interface 11, which further facilitates the wiring work and improves the efficiency.
[0043] In this embodiment, if Figure 1 As shown, the signal interface 11 includes multiple types, and each type of signal interface 11 includes multiple types, so as to simultaneously meet the test of multiple density relays of different models, and further improve the test efficiency of density relays; further, in this embodiment, the signal interface 11 is connected to the control unit through TCP communication, wherein TCP communication has the following advantages: Reliability: TCP ensures that data arrives at the destination reliably and in order through sequence numbers, confirmation responses, and retransmission mechanisms. This means that if a data packet is lost or an error occurs during transmission, TCP will automatically resend the data packet until the data is successfully delivered; connection-oriented: unlike UDP, TCP needs to establish a connection before data transmission; data orderliness: TCP ensures that data packets arrive in the order in which they are sent, which is necessary for most applications that require data integrity. This is particularly important because it ensures that the receiver can correctly reassemble the sender's data; flow control: TCP has a built-in flow control mechanism that prevents a fast sender from overwhelming a slow receiver. This is achieved through a sliding window protocol, which allows the receiver to adjust the sender's sending rate based on its own receiving capacity; Congestion control: TCP also implements a congestion control algorithm to avoid network congestion; when the traffic in the network is too heavy, TCP slows down the sending of data, thereby reducing packet loss and delay.
[0044] In this embodiment, if Figure 1 As shown, the pressure control and contact signal acquisition equipment also includes an air source distributor, which connects the air source outlet 13 with the air source distributor, and connects with multiple density relays to be tested through the air source distributor to simultaneously meet the testing of multiple density relays, thereby further improving the testing efficiency of the density relays.
[0045] Further, in the two embodiments, the frame structure 1 is made of metal materials, such as aluminum alloy; using aluminum alloy as the frame structure 1 has the following advantages: light weight and high strength: the density of aluminum alloy is low, about 2.63-2.85 g / cm3, which is much lower than other metal materials such as steel and copper, but its strength is relatively high, and its specific strength is close to that of high alloy steel, which makes aluminum alloy the first choice for lightweight materials; good processability: aluminum alloy is easy to machine and cast, and can be made into parts of various shapes and sizes by extrusion, stretching, rolling and forging, etc., and has good plasticity; corrosion resistance: aluminum alloy is not easy to rust even if it is exposed to air for a long time, because aluminum can quickly form a dense oxide film in the air to protect the inside from corrosion; electrical conductivity and thermal conductivity: aluminum alloy has excellent electrical conductivity and thermal conductivity, which is comparable to traditional copper and copper alloys, and is therefore widely used in the fields of electricity, electronics and communications; recyclability: aluminum alloy can be recycled and reused, is environmentally friendly, and meets the requirements of sustainable development; combining the above advantages of aluminum alloy, aluminum alloy is very suitable for use as the frame structure 1 of pressure control and contact signal acquisition equipment.
[0046] Furthermore, in this embodiment, the outer contour of the frame structure 1 is a rectangular parallelepiped. The outer contour of the rectangular parallelepiped is convenient for metal production through sheet metal and other processes, and the flat bottom structure is also convenient for the placement of the electrical equipment.
[0047] In this embodiment, if Figure 1 As shown, a roller 6 is provided at the bottom of the frame structure 1 to facilitate the movement of the pressure control and contact signal acquisition device, and to facilitate the use of the pressure control and contact signal acquisition device; further in this embodiment, the roller 6 includes four, and the four rollers 6 are arranged at the four corners of the bottom of the frame structure 1; and in this embodiment, the roller 6 adopts a universal wheel, wherein the universal wheel has the following advantages: omnidirectional movement: the universal wheel can realize multi-directional movement, so that the vehicle or robot can perform precise operation in a small space, and improves maneuverability and flexibility; in-situ turning: using a universal wheel on a large robot or vehicle, it is possible to realize in-situ turning without moving the position, which is particularly useful in a space-constrained environment; load-bearing capacity: certain types of universal wheels, such as Mecanum wheels, have a greater load-bearing capacity and friction with the ground, are not easy to slip, and are suitable for heavy-load applications; combining the advantages of the above-mentioned universal wheels, the universal wheel is very suitable for use as the roller 6 of the pressure control and contact signal acquisition device, because the pressure control and contact signal acquisition device of this embodiment requires a certain load-bearing capacity and flexible movement control.
[0048] In this embodiment, if Figure 1As shown, the control unit also includes a signal acquisition card, which is connected to the signal interface 11. The signal acquisition card can convert the analog signal sent by the density relay to be measured into a digital signal and then transmit it to the control unit.
[0049] In this embodiment, if Figure 1 As shown, the control unit adopts a computer host 3, and the computer host 3 is used to receive and record the corresponding node signal of the density relay to be tested. Different from the traditional manual recording, the automatic recording using the computer host 3 greatly saves manpower, and the recorded data is also more accurate and detailed.
[0050] In this embodiment, if Figure 1 As shown, the pressure control and contact signal acquisition equipment also includes a display device 4 arranged on the outside of the frame structure 1, and the display device 4 is connected to the computer host 3 to facilitate the test personnel to observe the operating status of the pressure control and contact signal acquisition equipment in real time.
[0051] In this embodiment, if Figure 1 As shown, the pressure control and contact signal acquisition device also includes an input device arranged on the outside of the frame structure 1 to facilitate the tester to interact with the pressure control and contact signal acquisition device.
[0052] In this embodiment, if Figure 1 As shown, the input device is a keyboard and mouse 5, and the input device is electrically connected to the computer host 3. Using the keyboard and mouse 5 as an input device is simple and easy to obtain and replace.
[0053] In this embodiment, if Figure 1As shown, the pressure control and contact signal acquisition device also includes a battery assembly, which ensures that the pressure control and contact signal acquisition device can be used without a power supply, expanding the usage scenario. Furthermore, in this embodiment, the battery assembly uses a lithium battery as an energy storage unit. The lithium battery has the following advantages: High energy density: The energy density of lithium batteries is relatively high, which means that in the case of the same volume or weight, lithium batteries can store more electrical energy, which makes lithium batteries particularly suitable for devices with limited space; Long service life: The service life of lithium batteries is relatively long. The cycle life of standard lithium-ion batteries can reach more than 500 times. Even after 500 charge and discharge cycles, the battery capacity can still be maintained at more than 70% of the nominal capacity; Low self-discharge rate: The self-discharge rate of lithium batteries is low. Even if they are not used for a long time, the power can be well maintained. After two months, the battery The capacity can be greater than or equal to 80%; Environmental protection: Lithium batteries do not contain harmful substances such as lead and mercury, and are more environmentally friendly than other types of batteries; High rated voltage: The single cell voltage of lithium batteries is high, about 3.6V, while ordinary nickel-metal hydride batteries are only 1.2V, which means that at the same output voltage, lithium batteries require fewer units in series; Wide operating temperature range: Lithium batteries can work normally within a wider temperature range, such as between -25°C and 60°C, which makes them suitable for a variety of environmental conditions; No memory effect: Lithium batteries have no memory effect and can be charged at any time without worrying about the power gradually decreasing; Combining the above advantages of lithium batteries, lithium batteries are very suitable for use as battery components of pressure control and contact signal acquisition equipment, because the pressure control and contact signal acquisition equipment of this embodiment requires to provide as much electrical energy as possible in a limited space while ensuring the service life.
[0054] As described above, the pressure control and contact signal acquisition equipment of the utility model has the following beneficial effects: when the pressure control and contact signal acquisition equipment of the utility model is in use, the gas source inlet 12 is connected to the gas source, the gas source outlet 13 is connected to the gas inlet of the density relay to be measured, and the node signal line of the density relay to be measured is connected to the signal interface 11, and then the control unit controls the pressure output device 2 to output a preset node air pressure, and at the same time detects whether the density relay to be measured sends a corresponding node signal; in the above-mentioned entire test process, the pressure control and contact signal acquisition equipment of the utility model is automatically completed by the control unit, compared with the traditional density relay that is manually completed, the efficiency is higher and the test accuracy consistency is better, and the pressure control and contact signal acquisition equipment of the utility model utilizes universal interfaces such as the gas source inlet 12, the gas source outlet 13 and the signal interface 11, which further facilitates the wiring work and improves the efficiency.
[0055] In summary, the pressure control and contact signal acquisition device of the utility model realizes automatic testing of the density relay by controlling the output of the preset node air pressure and collecting the node signal of the density relay, and solves the problems of low efficiency and unquantifiable test accuracy in the manual debugging process of the density relay in the prior art density relay. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.
[0056] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.
Claims
1. A pressure control and contact signal acquisition device for testing a density relay, characterized in that: include: A frame structure (1), the frame structure (1) comprising an inner cavity for accommodating various electrical devices, the frame structure (1) being provided with a signal interface (11), an air source inlet (12) and an air source outlet (13); A pressure output device (2), the pressure output device (2) being arranged in the inner cavity and being connected to the gas source inlet (12) and the gas source outlet (13) via a ventilation pipeline; a control unit, the control unit being disposed in the inner cavity and electrically connected to the pressure output device (2) and the signal interface (11); The air source inlet (12) is connected to the air source, the air source outlet (13) is connected to the air inlet of the density relay to be measured, the node signal line of the density relay to be measured is connected to the signal interface (11), and the control unit is used to control the pressure output device (2) to output a preset node air pressure, and at the same time detect whether the density relay to be measured sends a corresponding node signal.
2. The pressure control and contact signal acquisition device according to claim 1, characterized in that: The signal interface (11) includes multiple types, and each type of signal interface (11) includes multiple types, so as to simultaneously meet the test of multiple density relays of different models.
3. The pressure control and contact signal acquisition device according to claim 2, characterized in that: The pressure control and contact signal acquisition device also includes an air source distributor, which connects the air source outlet (13) to the air source distributor and connects to multiple density relays to be tested through the air source distributor to simultaneously meet the test of multiple density relays.
4. The pressure control and contact signal acquisition device according to claim 1, characterized in that: A roller (6) is provided at the bottom of the frame structure (1) to facilitate the movement of the pressure control and contact signal acquisition equipment.
5. The pressure control and contact signal acquisition device according to claim 1, characterized in that: The control unit also includes a signal acquisition card, which is connected to the signal interface (11) and is used to convert the analog signal sent by the density relay to be measured into a digital signal and then transmit it to the control unit.
6. The pressure control and contact signal acquisition device according to claim 1, characterized in that: The control unit adopts a computer host (3), and the computer host (3) is used to receive and record the corresponding node signal of the density relay to be tested.
7. The pressure control and contact signal acquisition device according to claim 6, characterized in that: The pressure control and contact signal acquisition device further comprises a display device (4) arranged outside the frame structure (1), wherein the display device (4) is connected to the computer host (3) to facilitate test personnel to observe the operating status of the pressure control and contact signal acquisition device in real time.
8. The pressure control and contact signal acquisition device according to claim 6, characterized in that: The pressure control and contact signal acquisition device also includes an input device arranged outside the frame structure (1), and the input device is electrically connected to the computer host (3) to facilitate the interaction between the tester and the pressure control and contact signal acquisition device.
9. The pressure control and contact signal acquisition device according to claim 8, characterized in that: The input device is a keyboard and mouse (5).
10. The pressure control and contact signal acquisition device according to claim 1, characterized in that: The pressure control and contact signal acquisition device also includes a battery assembly, which ensures that the pressure control and contact signal acquisition device can be used without a power source.