Pole-mounted circuit breaker sealing performance detection device

Abstract

The utility model discloses a pole-mounted circuit breaker sealing performance detection device, which relates to the field of circuit breaker detection and comprises a detection box body, a pole-mounted circuit breaker is placed on the inner side of the detection box body, a detection inflation inlet is formed in one side of the bottom of the pole-mounted circuit breaker, and an inflation interface assembly is arranged at one end of the detection inflation inlet in a penetrating manner. A quick-plug connector is arranged at one end of the inflation connector assembly, an inflation hose is arranged at one end of the quick-plug connector, a pressure regulating valve is arranged at one end of the inflation hose, and an air bottle is arranged at one end of the pressure regulating valve. According to the utility model, the structure is reasonable and reliable, the sealing performance detection is more accurate, through the arrangement of the inflation interface assembly, the first observation assembly and the second observation assembly, if the switch box body of the pole-mounted circuit breaker has a plurality of sealing parts during detection, air bubbles emerge once the sealing parts are poorly sealed, thereby helping to position leakage points, and improving the detection precision of the pole-mounted circuit breaker. And the switch box body does not need to be disassembled during detection, so that the sealing performance of the pole-mounted circuit breaker is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker detection, in particular to a column-mounted circuit breaker sealing performance detection device. Background Art

[0002] High-voltage vacuum circuit breakers, including pole-mounted circuit breakers, are primarily used to interrupt and close load currents, overload currents, and short-circuit currents in power systems. Pole-mounted circuit breakers are particularly suitable for outdoor environments, where they may encounter sealing issues. For example, during rainfall or temperature drops, the air inside the switch housing (or casing) contracts due to the drop in temperature. Due to respiration, condensation or rainwater in the sealing gap can easily enter the casing along with the external air. If the product's airtightness is poor, in humid climates or coastal areas, the mechanical components may severely rust, causing the mechanism to malfunction. Furthermore, moisture (or water) entering the switch's main conductive circuit can degrade insulation performance and, in severe cases, cause a short circuit. The sealing performance of a pole-mounted circuit breaker is directly related to its overall performance and reflects its quality. Therefore, good sealing is essential for ensuring the high reliability (long life and maintenance-free) of a pole-mounted circuit breaker.

[0003] In some special applications, pole-mounted circuit breakers are required to meet IP67 protection levels. Currently, the IP67 protection level test for pole-mounted circuit breakers involves placing the circuit breaker in a water tank. For enclosures less than 850mm tall, the lowest point must be 1000mm below the water surface; for enclosures 850mm or taller, the highest point must be 150mm below the water surface. The test lasts 30 minutes, and after the test, the circuit breaker must be unpacked and inspected for water ingress. However, this testing method is time-consuming and labor-intensive, with low efficiency and unsuitable for mass production. In actual production, submerging each product in water consumes significant time and resources. Furthermore, even if the test passes, the circuit breaker must be reassembled after opening, and the original sealing may not be guaranteed, making re-verification difficult.

[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the utility model provides a pole-mounted circuit breaker sealing performance detection device, which has the advantages of greatly improving the sealing performance efficiency of the pole-mounted circuit breaker and improving the detection reliability, thereby solving the problems of the existing technology being time-consuming and labor-intensive, inefficient, unsuitable for mass production, and possibly unable to ensure the original sealing of the pole-mounted circuit breaker during reassembly after detection.

[0007] (2) Technical solution

[0008] In order to achieve the above advantages of greatly improving the sealing efficiency of the pole-mounted circuit breaker and improving the detection reliability, the specific technical solutions adopted by the present invention are as follows:

[0009] A device for testing the sealing performance of a pole-mounted circuit breaker comprises a testing box, wherein the pole-mounted circuit breaker is placed inside the testing box, a testing inflation port is provided on one side of a bottom of the pole-mounted circuit breaker, and an inflation interface assembly is provided through one end of the testing inflation port, a quick connector is provided on one end of the inflation interface assembly, an inflation hose is provided on one end of the quick connector, a pressure regulating valve is provided on one end of the inflation hose, and a gas cylinder is provided on one end of the pressure regulating valve, first observation holes are provided on both ends of the testing box, second observation holes are symmetrically provided on both ends of both sides of the testing box, a first observation assembly is provided in the first observation hole, a second observation assembly is provided in the second observation hole, and an L-shaped drain pipe is provided through one side of the bottom end of the testing box.

[0010] Furthermore, in order to achieve the coordination between the inflation interface component and the detection inflation port, there is no need to open the switch box of the pole-mounted circuit breaker for inspection during inspection, thereby ensuring the sealing performance of the pole-mounted circuit breaker, the inflation interface component includes a valve body arranged at one end of the detection inflation port, one end of the valve body passes through the detection inflation port and is provided with an outlet pipe, an inner side of one end of the valve body is provided with a first O-shaped sealing ring, an air inlet pipe is arranged at the other end of the valve body, an outer side of the air outlet pipe is provided with a first clamping groove fixedly connected to the detection inflation port at one end near the valve body, a valve core component is provided at the middle part of one end of the air outlet pipe, and an outer side of the air inlet pipe is provided with a valve core assembly. One end of the body is provided with a second clamping groove that cooperates with the quick plug connector; the valve core assembly includes a valve seat that is arranged through the inner side of the outlet pipe, the valve seat is a hollow structure, and a plurality of diversion holes arranged in a circumferential manner are provided on the outside of one end of the valve seat, the outer side of the valve seat is sleeved with a second O-shaped sealing ring that cooperates with the outlet pipe, the other end of the valve seat is sleeved with a spring, one end of the spring is provided with a valve stem, the middle outer side of the valve stem is sleeved with a clamping ring, one end of the clamping ring is provided with a third O-shaped sealing ring that cooperates with the air inlet pipe, one end of the valve stem is a hollow structure, and a plurality of air injection holes arranged in a circumferential manner are provided on the outside of one end of the valve stem.

[0011] Furthermore, in order to enable the leakage point to be clearly observed through the first observation component and the second observation component, and provide greater convenience for subsequent maintenance, the first observation component includes a first observation window arranged on the inner side of the first observation hole, and the top and bottom of the first observation window are symmetrically provided with a first zigzag mounting bracket fixedly connected to the detection box body, and the two ends of the first observation window are symmetrically provided with a second zigzag mounting bracket fixedly connected to the detection box body; the second observation component includes a second observation window arranged on the inner side of the second observation hole, and the top and bottom of the second observation window are symmetrically provided with a third zigzag mounting bracket fixedly connected to the detection box body, and the two ends of the second observation window are symmetrically provided with a fourth zigzag mounting bracket fixedly connected to the detection box body.

[0012] (3) Beneficial effects

[0013] Compared with the prior art, the present invention provides a device for detecting the sealing performance of a pole-mounted circuit breaker, which has the following beneficial effects:

[0014] (1) The structure of the present invention is reasonable and reliable, and the sealing performance detection is more accurate. When the switch box of the pole-mounted circuit breaker has a slightly poor seal, the existing detection device has many sealing parts. If there is a leak in a sealing part of the switch box, it may be difficult to observe because too little water enters the switch box. Only larger leaks can be detected, and it is not easy to find small leaks. When using the present device for detection, if the switch box of the pole-mounted circuit breaker has multiple sealing parts, once these parts are poorly sealed, bubbles will emerge, thereby helping to locate the leak point.

[0015] (2) This device ensures the sealing of the pole-mounted circuit breaker by providing an air filling interface component. The existing detection device requires the switch box of the pole-mounted circuit breaker to be disassembled for inspection, and the sealing of the switch box after disassembly and reassembly cannot be verified. However, this device cooperates with the air filling port through the air filling interface component, and there is no need to disassemble the switch box during inspection, thereby ensuring the sealing performance of the pole-mounted circuit breaker.

[0016] (3) The present device can accurately determine the location of the leakage by setting up the first observation component and the second observation component. When the existing detection device disassembles the switch box of the pole-mounted circuit breaker and finds water inside, it can only be judged as unqualified and cannot accurately determine the location of the leakage. During the sealing test of the present device, because the internal air pressure of the switch box of the pole-mounted circuit breaker is higher than the external water pressure, when a leak occurs, gas is continuously released from the leakage point to form bubbles. The leakage point can be clearly observed through the first observation component and the second observation component, which provides great convenience for subsequent maintenance.

[0017] (4) This device significantly shortens the test time and reduces the workload. The existing detection device requires the pole-mounted circuit breaker to be immersed in water for more than 30 minutes, and then the pole-mounted circuit breaker is removed from the water tank and the switch box of the pole-mounted circuit breaker is disassembled to check the water leakage point. The whole process takes more than 40 minutes, while the detection time of this device can be controlled within 5 minutes. At the same time, the existing detection device requires the switch box to be disassembled for inspection, while this device can complete the inspection without disassembling the switch box of the pole-mounted circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 1 is a schematic structural diagram of a device for detecting the sealing performance of a pole-mounted circuit breaker according to an embodiment of the present utility model;

[0020] Figure 2 This is a partial structural diagram of a pole-mounted circuit breaker sealing performance detection device according to an embodiment of the present utility model;

[0021] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle;

[0022] Figure 4 It is a structural schematic diagram of the detection inflation port in the column mounted circuit breaker sealing performance detection device according to an embodiment of the present utility model;

[0023] Figure 5 1 is a structural diagram of an air filling interface assembly in a pole-mounted circuit breaker sealing performance detection device according to an embodiment of the present utility model;

[0024] Figure 6 1 is a schematic structural diagram of a valve core assembly in a column mounted circuit breaker sealing performance detection device according to an embodiment of the present utility model;

[0025] Figure 7 1 is a partial structural diagram of an air filling interface assembly in a sealing performance testing device for a pole-mounted circuit breaker according to an embodiment of the present utility model;

[0026] Figure 8 It is a structural schematic diagram of the second observation component in the pole-mounted circuit breaker sealing performance detection device according to an embodiment of the present utility model.

[0027] In the picture:

[0028] 1. Detection box; 2. Detection inflation port; 3. Inflation interface assembly; 301. Valve body; 302. Outlet pipe; 303. First O-shaped sealing ring; 304. Inlet pipe; 305. First clamping groove; 306. Valve core assembly; 3061. Valve seat; 3062. Diverter hole; 3063. Second O-shaped sealing ring; 3064. Spring; 3065. Valve stem; 3066. Snap ring; 3067. Third O-shaped sealing ring; 3068. Injection hole; 307. Second clamping groove Connecting slot; 4. Quick-connect connector; 5. Inflating hose; 6. Pressure regulating valve; 7. Gas cylinder; 8. First observation hole; 9. Second observation hole; 10. First observation assembly; 1001. First observation window; 1002. First zigzag mounting bracket; 1003. Second zigzag mounting bracket; 11. Second observation assembly; 1101. Second observation window; 1102. Third zigzag mounting bracket; 1103. Fourth zigzag mounting bracket; 12. L-shaped drain pipe; 13. Pole-mounted circuit breaker. DETAILED DESCRIPTION

[0029] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0030] According to an embodiment of the present utility model, a device for detecting the sealing performance of a pole-mounted circuit breaker is provided.

[0031] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figures 1-8 As shown, the pole-mounted circuit breaker sealing performance detection device according to the embodiment of the utility model includes a detection box 1 (in addition, in specific applications, the detection box 1 is made of stainless steel), a pole-mounted circuit breaker 13 is placed inside the detection box 1, and a detection inflation port 2 is provided on one side of the bottom of the pole-mounted circuit breaker 13, and an inflation interface component 3 is provided through one end of the detection inflation port 2, a quick-connector 4 is provided at one end of the inflation interface component 3, an inflation hose 5 is provided at one end of the inflation hose 5, a pressure regulating valve 6 is provided at one end of the pressure regulating valve 6, and a gas cylinder 7 is provided at one end of the pressure regulating valve 6, a first observation hole 8 is provided at both ends of the detection box 1, and second observation holes 9 are symmetrically provided at both ends of both sides of the detection box 1, a first observation component 10 is provided in the first observation hole 8, and a second observation component 11 is provided in the second observation hole 9, and an L-shaped drain pipe 12 is provided through one side of the bottom end of the detection box 1.

[0032] With the help of the above technical solution of the present invention, the structure of the present invention is reasonable and reliable, and the sealing performance detection is more accurate. When the switch box of the pole-mounted circuit breaker 13 has a slightly poor seal, the existing detection device has many sealing parts. If there is a leak in a sealed part of the switch box, it may be difficult to observe because too little water enters the switch box. Only larger leaks can be detected, and it is difficult to find small leaks. When using the present device for detection, if the switch box of the pole-mounted circuit breaker 13 has multiple sealing parts, once these parts are poorly sealed, bubbles will emerge, thereby helping to locate the leak point.

[0033] With existing detection devices, if the switch box of the pole-mounted circuit breaker 13 has a slightly poor seal, due to the large number of sealing parts, even if a sealing part of the switch box leaks, it may be difficult to observe because too little water enters the switch box. As a result, only larger leaks can be detected, but small leaks are difficult to find. However, even if the switch box of the pole-mounted circuit breaker 13 has a large number of sealing parts, the present device will still cause bubbles to emerge when there is a poor seal, thereby discovering the leak point.

[0034] In one embodiment, for the inflation interface component 3, the inflation interface component 3 includes a valve body 301 arranged at one end of the detection inflation port 2, one end of the valve body 301 passes through the detection inflation port 2 and is provided with an outlet pipe 302, a first O-shaped sealing ring 303 is provided on the inner side of one end of the valve body 301, and an air inlet pipe 304 is provided at the other end of the valve body 301. A first clamping groove 305 fixedly connected to the detection inflation port 2 is opened on the outer side of the outlet pipe 302 near the end of the valve body 301, and a first clamping groove 305 fixedly connected to the detection inflation port 2 is opened at one end of the outlet pipe 302. The valve core assembly 306 is provided through the valve body 301 (in addition, in specific applications, a cavity is provided on the inside of the valve body 301 to match the valve core assembly 306). A second clamping groove 307 is provided on the outside of the air inlet pipe 304 near the end of the valve body 301 to match the quick connector 4; the valve core assembly 306 includes a valve seat 3061 provided on the inside of the air outlet pipe 302 (in addition, in specific applications, the valve seat 3061 is fixedly connected to the air outlet pipe 302). The valve seat 3061 is a hollow structure, and the valve A plurality of circumferentially arranged diverter holes 3062 are provided on the outer side of one end of the seat 3061. A second O-shaped sealing ring 3063 is sleeved on the outer side of the valve seat 3061 to cooperate with the outlet pipe 302. A spring 3064 is sleeved on the other end of the valve seat 3061. A valve stem 3065 is provided on one end of the spring 3064. A clamping ring 3066 is sleeved on the outer side of the middle of the valve stem 3065. A third O-shaped sealing ring 3067 is provided on one end of the clamping ring 3066 to cooperate with the inlet pipe 304 (in addition, in specific applications, When in use, the diameter of the inner cavity of the valve body 301 close to the air inlet pipe 304 gradually decreases, and the diameter at the narrowest point is smaller than the diameter of the clamping ring 3066 and the third O-shaped sealing ring 3067). One end of the valve stem 3065 is a hollow structure, and a plurality of circumferentially arranged air injection holes 3068 are provided on the outer side of one end of the valve stem 3065, thereby realizing the coordination between the inflation interface assembly 3 and the detection inflation port 2. During the inspection, there is no need to open the switch box of the pole-mounted circuit breaker for inspection, thereby ensuring the sealing performance of the pole-mounted circuit breaker.

[0035] In addition, it should be noted that the quick connector 4 adopts a pneumatic quick connector, including a sub-body, a mother body, a stainless steel bead, a gasket and a valve. When the quick connector 4 is docked with the inflation interface assembly 3, the sub-body is inserted into the side of the mother body with the ring. At this time, the valve is opened, and the gas input from the inflation hose 5 is passed into the hollow structure at one end of the valve stem 3065. The stainless steel bead will lock to ensure the connection between the sub-body and the mother body, and the gasket inside can completely block the gas from leaking out. This is the existing technology and will not be elaborated here.

[0036] The working principle of the inflation interface component 3 is as follows: the inflation interface component 3 serves as a bridge connecting the detection inflation port 2 and the external inflation source. The valve body 301 is sealed with the detection inflation port 2 through the first O-shaped sealing ring 303 to ensure that there is no gas leakage during the inflation process. The outlet pipe 302 and the inlet pipe 304 cooperate to realize the inflow and outflow of gas. When the quick connector 4 is inserted, the valve stem 3065 will be pressed to one end of the valve seat 3061. At this time, the spring 3064 is compressed, and the hollow structure of the valve stem 3065 is connected to the quick connector 4. The gas supplied by the inflation hose 5 enters the interior of the valve body 301 through the gas injection hole 3068 of the valve stem 3065. The liquid flows out from the diverter hole 3062 on the valve seat 3061 and enters the interior of the pole-mounted circuit breaker 13 through the detection inflation port 2 to achieve inflation; when the quick connector 4 is unplugged, the spring 3064 rebounds and pushes the valve stem 3065 to the outside of the valve body 301. At this time, the clamping ring 3066 drives the third O-shaped sealing ring 3067 to move to the end of the air inlet pipe 304, sealing the interior of the valve body 301, thereby achieving the airtightness of the inflation interface assembly 3; through the inflation interface assembly 3, the sealing performance test can be carried out without opening the switch box of the pole-mounted circuit breaker 13, which reduces the operation steps and time and ensures the sealing of the qualified pole-mounted circuit breaker 13.

[0037] In one embodiment, for the first observation component 10 and the second observation component 11, the first observation component 10 includes a first observation window 1001 arranged on the inner side of the first observation hole 8 (in addition, in specific applications, the first observation window 1001 is made of transparent organic glass), the top and bottom of the first observation window 1001 are symmetrically provided with a first zigzag mounting frame 1002 fixedly connected to the detection box 1 (in addition, in specific applications, the first observation window 1001 and the first zigzag mounting frame 1002 and the second zigzag mounting frame 1003 are all connected by bolts), and the two ends of the first observation window 1001 are symmetrically provided with a second zigzag mounting frame 1003 fixedly connected to the detection box 1; the second observation component 11 includes a second observation window 1001 arranged on the inner side of the second observation hole 9 Observation window 1101 (in addition, in specific applications, the second observation window 1101 is made of transparent organic glass), the top and bottom of the second observation window 1101 are symmetrically provided with a third zigzag mounting bracket 1102 fixedly connected to the detection box body 1 (in addition, in specific applications, the second observation window 1101 and the third zigzag mounting bracket 1102 and the fourth zigzag mounting bracket 1103 are all connected by bolts), and the two ends of the second observation window 1101 are symmetrically provided with a fourth zigzag mounting bracket 1103 fixedly connected to the detection box body 1, so that the leakage location can be accurately determined. When a leakage occurs, gas is continuously released from the leakage point to form bubbles, and the leakage point can be clearly observed through the first observation component 10 and the second observation component 11, which provides greater convenience for subsequent maintenance.

[0038] The working principle of the first observation assembly 10 and the second observation assembly 11 is as follows: the air pressure inside and outside the detection box 1 is the same (0 gauge pressure), and the pole-mounted circuit breaker 13 to be tested is sunk into the detection box 1. The IP67 protection level test performed by the existing detection device requires that the lowest point of the circuit breaker housing should be 1 meter below the water surface. The maximum pressure that the housing can withstand (1 meter underwater) is: P = ρgh; ρ = 1.0×103kg / m 3 ; g=9.8N / kg≈10N / kg; h=1m; P=10000N / m 2 =0.01MPa; at this time, the gas pressure inside the shell is lower than the external pressure, with a maximum pressure difference of 0.01MPa; when there is no air in the shell (zero gauge pressure), if the shell is not sealed well, water will enter the shell from the poorly sealed part due to the pressure difference between the inside and outside. When the existing detection device is in normal operation, the pole-mounted circuit breaker 13 needs to be placed in water for 30 minutes before being removed and disassembled to check whether there is water accumulation in the switch box.

[0039] In order to shorten the detection time and more intuitively check whether the switch box is leaking, at the same time, when a leak occurs, the leakage point can be clearly observed and confirmed, the device opens a detection inflation port 2 on one side of the pole-mounted circuit breaker 13 to be detected, and the detection inflation port 2 is connected to the gas cylinder 7 in sequence through the inflation interface assembly 3, the quick-connect connector 4, and the inflation hose 5, and the pole-mounted circuit breaker 13 is inflated through the pressure regulating valve 6. Then the pole-mounted circuit breaker 13 is completely immersed in the water-filled detection box 1. At this time, the gas pressure inside the switch box of the pole-mounted circuit breaker 13 is higher than the external water pressure. After the water surface is completely still, observe whether there are bubbles. Transparent first observation windows 1001 and second observation windows 1101 are provided on all four sides of the detection box 1 for easy observation. If a leak occurs somewhere on the pole-mounted circuit breaker 13, the leakage point can be confirmed by observing the location where the bubbles are generated, so as to facilitate maintenance and treatment.

[0040] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.

[0041] In actual application, first fill the detection box 1 with water, then open the gas cylinder 7. Since the detection inflation port 2 is connected to the gas cylinder 7 through the inflation interface assembly 3, the quick connector 4, and the inflation hose 5, dry nitrogen or air (or other gases as needed) is filled into the pole-mounted circuit breaker 13 to be detected, and the gas pressure is adjusted by the pressure regulating valve 6 to a inflation pressure of 0.02 to 0.03 MPa. Keep the pole-mounted circuit breaker 13 completely immersed in the detection box 1 (below the water surface). At this time, the gas pressure inside the switch box of the pole-mounted circuit breaker 13 is higher than the external water pressure (the lowest point is 1 meter underwater), and the internal and external pressure difference is 0.01 to 0.02 MPa. After the water surface is completely still, observe whether there are bubbles. Transparent first observation windows 1001 and second observation windows 1101 are provided on all four sides of the detection box 1 for easy observation. If a leak occurs somewhere, the leak point can be confirmed by observing the location where the bubbles are generated, which is convenient for subsequent maintenance.

[0042] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting the sealing performance of a pole-mounted circuit breaker, comprising a detection box (1), characterized in that: A column-mounted circuit breaker is placed inside the detection box (1), and a detection inflation port (2) is provided on one side of the bottom of the column-mounted circuit breaker. An inflation interface component (3) is provided through one end of the detection inflation port (2), a quick-connect connector (4) is provided at one end of the inflation interface component (3), an inflation hose (5) is provided at one end of the quick-connect connector (4), a pressure regulating valve (6) is provided at one end of the inflation hose (5), and a gas cylinder (7) is provided at one end of the pressure regulating valve (6).

2. A pole mounted circuit breaker sealing performance detection device according to claim 1, characterized in that: The detection box (1) is provided with first observation holes (8) at both ends, and second observation holes (9) are symmetrically provided at both ends of both sides of the detection box (1). A first observation component (10) is provided in the first observation hole (8), and a second observation component (11) is provided in the second observation hole (9). An L-shaped drainage pipe (12) is provided through one side of the bottom end of the detection box (1).

3. The sealing performance detection device for a pole-mounted circuit breaker according to claim 2, characterized in that: The inflation interface assembly (3) comprises a valve body (301) arranged at one end of the detection inflation port (2); one end of the valve body (301) is provided with an air outlet pipe (302) passing through the detection inflation port (2); a first O-shaped sealing ring (303) is provided on the inner side of one end of the valve body (301); and the other end of the valve body (301) is provided with an air inlet pipe (304).

4. The sealing performance detection device for a pole-mounted circuit breaker according to claim 3, characterized in that: A first clamping groove (305) fixedly connected to the detection inflation port (2) is provided on the outer side of the air outlet pipe (302) at one end close to the valve body (301); a valve core assembly (306) is provided at the middle of one end of the air outlet pipe (302) passing through the valve body (301); and a second clamping groove (307) cooperating with the quick connector (4) is provided on the outer side of the air inlet pipe (304) at one end close to the valve body (301).

5. The sealing performance detection device for a pole-mounted circuit breaker according to claim 4, characterized in that: The valve core assembly (306) includes a valve seat (3061) that is arranged on the inner side of the air outlet pipe (302). The valve seat (3061) is a hollow structure, and a plurality of circumferentially arranged diversion holes (3062) are provided on the outer side of one end of the valve seat (3061). A second O-shaped sealing ring (3063) that matches the air outlet pipe (302) is provided on the outer side of the valve seat (3061). A spring (3064) is provided on the other end of the valve seat (3061), and a valve stem (3065) is provided on one end of the spring (3064).

6. The sealing performance detection device for a pole-mounted circuit breaker according to claim 5, characterized in that: A snap ring (3066) is sleeved on the outer side of the middle part of the valve stem (3065), and one end of the snap ring (3066) is provided with a third O-shaped sealing ring (3067) that matches the air inlet pipe (304). One end of the valve stem (3065) is a hollow structure, and a plurality of air injection holes (3068) arranged in a circumferential pattern are opened on the outer side of one end of the valve stem (3065).

7. The sealing performance detection device for a pole mounted circuit breaker according to claim 2, characterized in that: The first observation assembly (10) comprises a first observation window (1001) arranged inside the first observation hole (8), first zigzag mounting frames (1002) fixedly connected to the detection box (1) are symmetrically arranged at the top and bottom of the first observation window (1001), and second zigzag mounting frames (1003) fixedly connected to the detection box (1) are symmetrically arranged at both ends of the first observation window (1001).

8. The sealing performance detection device for a pole-mounted circuit breaker according to claim 2, characterized in that: The second observation assembly (11) comprises a second observation window (1101) arranged inside the second observation hole (9); a third zigzag mounting bracket (1102) fixedly connected to the detection box (1) is symmetrically arranged at the top and bottom of the second observation window (1101); and a fourth zigzag mounting bracket (1103) fixedly connected to the detection box (1) is symmetrically arranged at both ends of the second observation window (1101).

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