Intelligent electric energy meter automatic test system with dynamically selectable test modules

Abstract

The invention discloses an intelligent electric energy meter automatic test system with a dynamically selectable test module. The intelligent electric energy meter automatic test system comprises a test device, a test box body, a host, a main processing module, an interaction module, a guide rail, an electric energy meter, a pneumatic locking component and a cooling ring pipe. Compared with the prior art, the electric energy meter cooling device has the following advantages and effects that the pneumatic locking component can lock the electric energy meter on the basis of guided-in cold air and can guide the cold air into the cooling ring pipe to achieve cooling of the main machine, the two functions of the pneumatic locking component can effectively integrate fixing of the electric energy meter and cooling of the main machine, and the electric energy meter cooling device is convenient to use and high in practicability. And great convenience is brought to testing of the electric energy meter.

Description

Technical Field

[0001] The invention relates to the field of electric energy meter testing, and in particular to an intelligent electric energy meter automatic testing system with dynamically selectable test modules. Background Art

[0002] The energy meter is commonly known as the watt-hour meter, which is an instrument for measuring the energy consumed by electrical appliances. The energy meter needs to be placed in the test device, and then connected to the host in the test device through a wire for testing.

[0003] On the one hand, after the existing electric energy meter is placed in the test device, it is generally fixed with screws to prevent the electric energy meter from falling and being damaged or even causing safety accidents. The screw fixing method is very cumbersome, and it is necessary to find suitable screws and use screwdriver tools that match the texture of the screw head. The process of unscrewing / tightening the screws is time-consuming and laborious, and the efficiency is low; and when the texture of the screw head is worn out, the screw cannot be unscrewed, resulting in the electric energy meter being unable to be disassembled. Therefore, it is necessary to optimize the fixation of the electric energy meter.

[0004] On the other hand, the host needs to be cooled down to ensure that it will not burn out during long working hours.

[0005] Therefore, if the fixation of the electric energy meter and the cooling of the host can be integrated to achieve coordinated operation, it will undoubtedly bring great convenience to the testing of the electric energy meter. Summary of the invention

[0006] The purpose of the present invention is to provide an intelligent electric energy meter automatic testing system with dynamically selectable test modules, so as to solve the problems raised in the background technology.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] An automatic test system for a smart electric energy meter with dynamically selectable test modules comprises a test device, wherein the test device comprises a test box and a host placed in the test box, wherein the host is at least provided with a main processing module and an interactive module, wherein after the electric energy meter is placed in the test box, the main processing module is connected to the main processing module through a wire, and a selectable functional test is performed on the electric energy meter through the main processing module, and the interactive module is connected to the main processing module to realize remote interactive control;

[0009] The test box is provided with two parallel guide rails, on which an electric energy meter slides in cooperation, and the back of the electric energy meter is provided with a guide groove adapted to the guide rails, and the electric energy meter can be embedded from the left ends of the two guide rails to slide horizontally;

[0010] A pneumatic locking component is arranged in the test box, and when the electric energy meter slides on the two guide rails until it contacts the pneumatic locking component, the pneumatic locking component can lock the position of the electric energy meter; a cooling ring pipe is arranged around the outer periphery of the main unit; the pneumatic locking component can not only use cold air as a driving source to lock the electric energy meter, but also can introduce cold air into the cooling ring pipe to achieve cooling of the main unit.

[0011] Further configuration is: the pneumatic locking component includes a fixing seat fixed in the test box body, the left side of the fixing seat is provided with an external extension block, a first internal extension groove is formed between the upper end surface of the external extension block and the interior of the fixing seat, and a second internal extension groove is formed between the lower end surface of the external extension block and the upper end surface of the guide rail located above the two guide rails; an extension section is fixedly arranged on the right side of the electric energy meter, and a first embedded section and a second embedded section are fixedly arranged on the upper and lower ends of the right side of the extension section, respectively, the first embedded section and the second embedded section can be respectively extended into the first internal extension groove and the second internal extension groove, and an internal positioning groove for the external extension block to extend into and resist is formed between the first embedded section and the second embedded section; a built-in locking unit is arranged inside the external extension block, which can lock the external extension block with the first embedded section.

[0012] The further configuration is as follows: the built-in locking unit comprises a longitudinal built-in groove provided inside the outer extension block, a built-in locking block is slidably provided in the built-in groove, the built-in locking block can slide longitudinally in the built-in groove, the upper end of the built-in groove is open, and the lower end is a closed groove bottom; a locking through hole is provided in the first embedded section, when the outer extension block extends into the inner positioning groove and abuts against the groove bottom of the inner positioning groove, the locking through hole corresponds to the position of the built-in locking block; a built-in spring is compressed between the built-in locking block and the groove bottom of the built-in groove, the built-in spring provides a driving force for the built-in locking block to move upward, and the built-in locking block can penetrate into the locking through hole to realize the locking of the outer extension block and the first embedded section;

[0013] The upper left end of the built-in locking block is provided with an oblique locking guide surface.

[0014] Further configuration is: a first fixing block is fixedly provided on the right side of the built-in locking block, a second fixing block is fixedly provided on the right side of the first fixing block, and the cross-sectional shapes of the first fixing block and the second fixing block are both right-angled triangles; a left side wall of the built-in locking block is in contact with the left inner wall of the built-in groove, and a right side wall of the second fixing block is in contact with the right inner wall of the built-in groove; a built-in stopper is fixedly provided at the opening of the built-in groove through a first inner locking piece, and the built-in stopper can be abutted against the second fixing block to limit the built-in locking block;

[0015] A recessed cavity with a right-angled triangle cross-section is provided at the upper right corner of the second fixed block; a first inner channel is provided between the fixed seat and the outer extension block, a second inner channel is provided between the fixed seat and the first embedded section, and a third inner channel is provided in the fixed seat; the recessed cavity, the first inner channel, the second inner channel and the third inner channel are connected in sequence; cold air is introduced into the third inner channel, and the cold air can be led into the recessed cavity. As the recessed cavity expands, the built-in locking block will move downward and disengage from the locking perforation.

[0016] Further configuration is: a cold air duct is opened in the fixing seat, and a relay pipe opening is fixedly arranged on the front end surface of the fixing seat, and a cold air duct is arranged between the relay pipe opening and the cooling ring pipe; cold air is introduced into the cold air duct, and the cold air can be guided into the cooling ring pipe.

[0017] A further configuration is as follows: an upper slot is provided at the upper end of the fixing seat, a switching conductive seat is inserted into the upper slot, and an indicating arrow indicating the insertion direction of the switching conductive seat is provided on the front end face of the switching conductive seat; a guide hole is provided in the switching conductive seat, the upper end of the guide hole serves as an inlet port extending to the upper end face of the switching conductive seat, and the lower end serves as an outlet port extending to the lower end face of the switching conductive seat; after the switching conductive seat is inserted into the upper slot, the outlet port of the guide hole will only communicate with the third inner channel or the cold air channel.

[0018] Further configuration is: an upper extension section is fixedly provided at the upper end of the switch conduction seat, an access pipe opening connected to the inlet of the guide hole is opened in the upper extension section; an indicator block is fixedly provided at one end of the upper extension section;

[0019] When the switch conduction seat is inserted into the upper slot and the indicator block is located at the leftmost position, the guide port of the guide hole is connected to the third inner channel, and the cold air channel is closed;

[0020] When the switch conduction seat is inserted into the upper slot and the indicating block is located at the rightmost position, the guide outlet of the guide hole is connected to the cold air duct, and the third inner channel is closed.

[0021] The further configuration is as follows: a transverse slot is provided in the fixing seat, the transverse slot is located on the left side of the upper slot, the left side of the transverse slot is the slot bottom, the right side is the opening and communicates with the upper slot; an insertion ball and an insertion spring are provided in the transverse slot, the insertion spring provides a driving force for the insertion ball to move rightward, and the insertion ball can maintain a state of partially extending out of the opening of the transverse slot; a limited sealing block is fixedly provided at the opening of the transverse slot, and the limited sealing block can contact the insertion ball to prevent the insertion ball from completely escaping from the transverse slot; an arc-shaped first insertion inner surface is provided on one side of the switching conductive seat, and a second insertion inner surface is provided on the other side of the switching conductive seat relative to the first insertion inner surface; when the guide outlet of the guide hole is communicated with the third inner channel, the insertion ball just pushes into the first insertion inner surface; when the guide outlet of the guide hole is connected to the cold air duct, the insertion ball just pushes into the second insertion inner surface.

[0022] A further configuration is that a sealing groove is provided on the upper end surface of the first embedded section, and a sealing ring is provided in the sealing groove, and the sealing ring can be attached to the fixing seat to prevent cold air from leaking in the second inner channel.

[0023] The present invention has the following beneficial effects:

[0024] 1. In the present invention, the electric energy meter is slidably arranged on two guide rails, which can easily and labor-savingly guide the electric energy meter to contact with the pneumatic locking component, and then lock the position of the electric energy meter through the pneumatic locking component to prevent the electric energy meter from falling. The cooling ring is arranged around the outer periphery of the host. The pneumatic locking component can not only lock the electric energy meter based on the introduced cold air, but also introduce the cold air into the cooling ring to achieve cooling of the host. The two functions of the pneumatic locking component can effectively integrate the fixation of the electric energy meter and the cooling of the host, which greatly facilitates the testing of the electric energy meter.

[0025] 2. In the present invention, the first inner extending groove and the second inner extending groove provide placement space for the first embedded section and the second embedded section respectively. The outer extending block on the fixing seat can extend into the inner positioning groove and prevent the electric energy meter from shaking by contacting with the first embedded section and the second embedded section. The outer extending block is then locked with the first embedded section by a built-in locking unit, thereby achieving the purpose of locking the electric energy meter.

[0026] 3. In the present invention, the built-in locking block in the built-in locking unit can keep moving upward under the driving force of the built-in spring, and when the outer extension block extends into the inner positioning groove and abuts against the bottom of the inner positioning groove, the built-in locking block can penetrate into the locking through hole to achieve the locking of the outer extension block and the first embedded section; the locking method is very convenient, and the built-in spring provides conditions for automation; the locking guide surface can ensure that the process of the first embedded section extending into the first inner extension groove will not be hindered.

[0027] 4. In the present invention, the second fixed block can be offset against the built-in stopper to limit the built-in locking block; the setting of the recessed cavity provides space for the introduction of cold air; the setting of the third inner channel, the second inner channel and the first inner channel can guide the cold air into the recessed cavity in turn. After the cold air is guided into the recessed cavity, the recessed cavity will expand, and the built-in locking block will move downward and disengage from the locking perforation, thereby releasing the lock on the electric energy meter and facilitating the disassembly of the electric energy meter.

[0028] 5. In the present invention, cold air can be introduced into the cooling ring pipe in sequence through the cold air duct, the relay pipe opening and the cold air duct.

[0029] 6. In the present invention, the switching conductive seat can be inserted into the upper end slot. By rotating the switching conductive seat, the position of the switching conductive seat after being inserted into the upper end slot can be switched, so that the guide outlet of the guide hole will only be connected to the third inner channel or the cold air channel, thereby realizing the switching of two different output paths.

[0030] 7. In the present invention, the indicator block can be checked by the user, so that after inserting the switch conductive seat into the upper end slot, the user can know whether the guide outlet of the guide hole is connected to the third inner channel or the cold air duct, which saves time and effort in actual operation.

[0031] 8. In the present invention, positioning and hand feeling feedback are performed by arranging a push-in ball to push against the first push-in inner surface or the second push-in inner surface; at the same time, the switch conductive seat can be prevented from rotating, and the stability is better.

[0032] 9. In the present invention, the provision of the sealing ring can prevent the cold air from leaking in the second inner channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of an embodiment;

[0034] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0035] Figure 3 for Figure 2 Enlarged view of part B in the middle.

[0036] In the figure: 11, test box; 12, host; 13, cooling ring; 21, guide rail; 22, electric energy meter; 31, fixed seat; 32, external extension block; 331, first inner extension groove; 332, second inner extension groove; 41, extension section; 421, first embedded section; 4211, sealing ring; 422, second embedded section; 43, inner positioning groove; 51, built-in groove; 52, built-in locking block; 521, locking guide surface; 53, locking perforation; 54, built-in spring; 61, first fixing block; 62, second fixing block; 63, first Inner locking member; 64, built-in stopper; 65, recessed cavity; 661, first inner channel; 662, second inner channel; 663, third inner channel; 71, cold air duct; 72, relay pipe opening; 73, cold air duct; 81, upper end slot; 82, switching conduction seat; 821, indication arrow; 83, guide hole; 84, upper end extension section; 841, access pipe opening; 842, indication block; 91, horizontal slot; 92, push-in ball; 93, push-in spring; 941, first push-in inner surface; 942, second push-in inner surface; 95, limit sealing block. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] As attached Figures 1 to 3 As shown;

[0039] The present embodiment discloses an automatic test system for a smart electric energy meter with dynamically selectable test modules, comprising a test device, the test device comprising a test box 11 and a host 12 placed in the test box 11, the host 12 being configured with at least a main processing module and an interactive module, after an electric energy meter 22 is placed in the test box 11, it is connected to the main processing module through a wire, and a selectable functional test is performed on the electric energy meter 22 through the main processing module, and the interactive module is connected to the main processing module to realize remote interactive control;

[0040] Two parallel guide rails 21 are arranged in the test box 11, and an electric energy meter 22 slides on the two guide rails 21. A guide groove adapted to the guide rails 21 is arranged on the back of the electric energy meter 22, and the electric energy meter 22 can be embedded from the left ends of the two guide rails 21 to slide horizontally;

[0041] A pneumatic locking component is provided in the test box 11. When the electric energy meter 22 slides on the two guide rails 21 until it contacts the pneumatic locking component, the pneumatic locking component can lock the position of the electric energy meter 22. A cooling ring 13 is provided around the outer periphery of the main unit 12. The pneumatic locking component can not only use cold air as a driving source to lock the electric energy meter 22, but also introduce cold air into the cooling ring 13 to cool the main unit 12.

[0042] Among them, the pneumatic locking component includes a fixing seat 31 fixed in the test box 11, and an outer extension block 32 is provided on the left side of the fixing seat 31. A first inner extension groove 331 is formed between the upper end surface of the outer extension block 32 and the inside of the fixing seat 31, and a second inner extension groove 332 is formed between the lower end surface of the outer extension block 32 and the upper end surface of the guide rail 21 located above the two guide rails 21; an extension section 41 is fixedly arranged on the right side of the electric energy meter 22, and a first embedded section 421 and a second embedded section 422 are fixedly arranged on the upper and lower ends of the right side of the extension section 41, respectively, and the first embedded section 421 and the second embedded section 422 can be respectively extended into the first inner extension groove 331 and the second inner extension groove 332, and an inner positioning groove 43 for the outer extension block 32 to extend into and resist is formed between the first embedded section 421 and the second embedded section 422; a built-in locking unit that can lock the outer extension block 32 with the first embedded section 421 is arranged inside the outer extension block 32.

[0043] The built-in locking unit includes a longitudinal built-in groove 51 provided inside the outer extension block 32, a built-in locking block 52 is slidably provided in the built-in groove 51, and the built-in locking block 52 can slide longitudinally in the built-in groove 51, and the upper end of the built-in groove 51 is open and the lower end is a closed groove bottom; a locking through hole 53 is provided in the first embedded section 421, and when the outer extension block 32 extends into the inner positioning groove 43 and abuts against the groove bottom of the inner positioning groove 43, the locking through hole 53 corresponds to the position of the built-in locking block 52; a built-in spring 54 is compressed between the built-in locking block 52 and the groove bottom of the built-in groove 51, and the built-in spring 54 provides a driving force for the built-in locking block 52 to move upward, and the built-in locking block 52 can penetrate into the locking through hole 53 to achieve the locking of the outer extension block 32 and the first embedded section 421;

[0044] The upper left end of the built-in locking block 52 has an oblique locking guide surface 521 .

[0045] Among them, a first fixing block 61 is fixedly provided on the right side of the built-in locking block 52, and a second fixing block 62 is fixedly provided on the right side of the first fixing block 61. The cross-sectional shapes of the first fixing block 61 and the second fixing block 62 are both right triangles; the left side wall of the built-in locking block 52 is in contact with the left inner wall of the built-in groove 51, and the right side wall of the second fixing block 62 is in contact with the right inner wall of the built-in groove 51; a built-in stopper 64 is fixedly provided at the opening of the built-in groove 51 through a first inner locking piece 63, and the built-in stopper 64 can abut against the second fixing block 62 to limit the built-in locking block 52;

[0046] A recessed cavity 65 with a right-angled triangle cross-section is provided at the upper right corner of the second fixed block 62; a first inner channel 661 is provided between the fixed seat 31 and the outer extension block 32, a second inner channel 662 is provided between the fixed seat 31 and the first embedded section 421, and a third inner channel 663 is provided in the fixed seat 31; the recessed cavity 65, the first inner channel 661, the second inner channel 662 and the third inner channel 663 are connected in sequence; cold air is introduced into the third inner channel 663, and the cold air can be guided into the recessed cavity 65. As the recessed cavity 65 expands, the built-in locking block 52 will move downward and disengage from the locking through hole 53.

[0047] Among them, a cold air duct 71 is opened in the fixed seat 31, and a relay pipe port 72 is fixedly set on the front end surface of the fixed seat 31, and a cold air duct 73 is set between the relay pipe port 72 and the cooling ring pipe 13; cold air is introduced into the cold air duct 71, and the cold air can be guided into the cooling ring pipe 13.

[0048] Among them, an upper end slot 81 is opened at the upper end of the fixing seat 31, and a switching conductive seat 82 is inserted in the upper end slot 81, and the front end face of the switching conductive seat 82 is provided with an indicating arrow 821 indicating the insertion direction of the switching conductive seat 82; a guide hole 83 is opened in the switching conductive seat 82, and the upper end of the guide hole 83 extends to the upper end face of the switching conductive seat 82 as an inlet, and the lower end extends to the lower end face of the switching conductive seat 82 as an outlet; after the switching conductive seat 82 is inserted into the upper end slot 81, the outlet of the guide hole 83 will only be communicated with the third inner channel 663 or the cold air channel 71.

[0049] The upper end of the switch conductive seat 82 is fixedly provided with an upper extension section 84, and an access pipe opening 841 connected to the inlet of the guide hole 83 is opened in the upper extension section 84; an indicator block 842 is fixedly provided at one end of the upper extension section 84;

[0050] When the switch conducting seat 82 is inserted into the upper slot 81 and the indicating block 842 is located at the leftmost position, the outlet of the guide hole 83 is connected to the third inner channel 663, and the cold air channel 71 is closed;

[0051] When the switch conductive seat 82 is inserted into the upper end slot 81 and the indicating block 842 is located at the rightmost position, the outlet of the guide hole 83 is connected to the cold air passage 71 and the third inner passage 663 is closed.

[0052] Among them, a transverse slot 91 is opened in the fixing seat 31, and the transverse slot 91 is located on the left side of the upper slot 81. The left side of the transverse slot 91 is the slot bottom, and the right side is an opening and communicates with the upper slot 81; a push-in ball 92 and a push-in spring 93 are arranged in the transverse slot 91, and the push-in spring 93 provides a driving force for the push-in ball 92 to move rightward, and the push-in ball 92 can maintain a state of partially extending out of the opening of the transverse slot 91; a limit seal block 95 is fixedly arranged at the opening of the transverse slot 91, and the limit seal block 95 can be fixed with the push-in spring 93. The ball 92 contacts the guide hole 83 to prevent the push-in ball 92 from completely falling out of the horizontal groove 91; a first arc-shaped push-in inner surface 941 is provided on one side of the switching conductive seat 82, and a second push-in inner surface 942 is provided on the other side of the switching conductive seat 82 relative to the first push-in inner surface 941; when the guide outlet of the guide hole 83 is connected to the third inner channel 663, the push-in ball 92 just pushes into the first push-in inner surface 941; when the guide outlet of the guide hole 83 is connected to the cold air duct 71, the push-in ball 92 just pushes into the second push-in inner surface 942.

[0053] A sealing groove is formed on the upper end surface of the first embedded section 421 , and a sealing ring 4211 is disposed in the sealing groove. The sealing ring 4211 can be attached to the fixing seat 31 to prevent cold air from leaking in the second inner channel 662 .

[0054] It should be noted that, in this embodiment, the cold air can be discharged automatically, or the inflation electric pump and the exhaust electric pump can be connected to the access pipe port 841 by setting a three-way pipe, and the exhaust electric pump can be used to quickly discharge the cold air.

[0055] The working principle of this embodiment is:

[0056] ① Place the electric energy meter 22 on the two guide rails 21 in the test box 11, and then push the electric energy meter 22 to move right. The extension section 41 on the right side of the electric energy meter 22 moves right along with it. The first embedded section 421 and the second embedded section 422 can extend into the first inner extending groove 331 and the second inner extending groove 332 respectively. At this time, the outer extension block 32 will abut against the bottom of the inner positioning groove 43.

[0057] ② When the first embedded section 421 extends into the first inner extending groove 331, the right end of the first embedded section 421 will contact the locking guide surface 521, and then continuously push the built-in locking block 52 downward to prevent the built-in locking block 52 from hindering the normal rightward movement of the first embedded section 421.

[0058] ③ When the outer extension block 32 abuts against the bottom of the inner positioning groove 43, the inner locking block 52 moves upward under the driving force of the inner spring 54, and then penetrates into the locking through hole 53 to achieve locking of the outer extension block 32 and the first embedded section 421.

[0059] ④ When it is necessary to unlock the electric energy meter 22; insert the switching conductive seat 82 from top to bottom into the upper end slot 81, and the indicator block 842 must be located at the leftmost position; in this way, the outlet of the guide hole 83 is connected to the third inner channel 663, and the cold air channel 71 is closed; and at this time, the push-in ball 92 will just push into the first push-in inner surface 941 to achieve the limit of the switching conductive seat 82; turn on the inflation pump, the inflation pump will guide the cold air into the access pipe port 841, and then the cold air will be guided into the recessed cavity 65 through the guide hole 83, the third inner channel 663, the second inner channel 662 and the first inner channel 661 in turn, the recessed cavity 65 will expand, and the built-in locking block 52 will move downward and disengage from the locking perforation 53, thereby unlocking the electric energy meter 22, pulling the electric energy meter 22 to the left, and the disassembly can be completed.

[0060] ⑤ When it is necessary to introduce cold air into the cooling loop 13, rotate the switching conduction seat 82 half a circle, and the indicator block 842 will be located at the rightmost position; in this way, the outlet of the guide hole 83 is connected to the cold air duct 71, and the third inner channel 663 is closed; and at this time, the pushing ball 92 will just push into the second pushing inner surface 942 to achieve the limiting of the switching conduction seat 82; turn on the inflation electric pump, and the inflation electric pump will introduce the cold air into the access pipe port 841, and then the cold air will be introduced into the cooling loop 13 through the cold air duct 71, the relay pipe port 72 and the cold air duct 73 in turn, thereby achieving cooling of the host 12.

[0061] ⑥ A further operation is: in order to avoid the waste of cold air, the switch conductive seat 82 can be rotated to close the cold air duct 71; after a certain period of time, the switch conductive seat 82 is rotated again to allow the outlet of the guide hole 83 and the cold air duct 71 to realize the introduction of the discharge of cold air.

[0062] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An automatic test system for a smart electric energy meter with dynamically selectable test modules, characterized in that: The test device comprises a test box (11) and a host (12) placed in the test box (11), wherein the host (12) is at least provided with a main processing module and an interactive module, and after the electric energy meter (22) is placed in the test box (11), it is connected to the main processing module via a wire, and a selectable functional test is performed on the electric energy meter (22) via the main processing module, and the interactive module is connected to the main processing module to realize remote interactive control; Two parallel guide rails (21) are arranged in the test box (11), and an electric energy meter (22) is slidably mounted on the two guide rails (21). A guide groove adapted to the guide rails (21) is arranged on the back of the electric energy meter (22), and the electric energy meter (22) can be embedded in the left ends of the two guide rails (21) to slide horizontally. A pneumatic locking component is arranged in the test box (11), and when the electric energy meter (22) slides on the two guide rails (21) until it contacts the pneumatic locking component, the pneumatic locking component can lock the position of the electric energy meter (22); a cooling ring pipe (13) is arranged around the outer periphery of the host (12); the pneumatic locking component can not only use cold air as a driving source to perform the action of locking the electric energy meter (22), but also can guide cold air into the cooling ring pipe (13) to achieve cooling of the host (12).

2. The automatic test system for a smart electric energy meter with dynamically selectable test modules according to claim 1, characterized in that: The pneumatic locking component comprises a fixing seat (31) fixed in the test box (11), the fixing seat (31) has an outer extension block (32) on the left side, a first inner extension groove (331) is formed between the upper end surface of the outer extension block (32) and the interior of the fixing seat (31), and a second inner extension groove (332) is formed between the lower end surface of the outer extension block (32) and the upper end surface of the guide rail (21) located at the upper side of the two guide rails (21); an extension section (41) is fixedly arranged on the right side of the electric energy meter (22), and the extension section (41) ) are respectively fixedly provided with a first embedding section (421) and a second embedding section (422) at the upper and lower ends on the right side, the first embedding section (421) and the second embedding section (422) can be respectively extended into the first inner extending groove (331) and the second inner extending groove (332), and an inner positioning groove (43) is formed between the first embedding section (421) and the second embedding section (422) for the outer extension block (32) to extend into and abut against each other; the outer extension block (32) is internally provided with a built-in locking unit capable of locking the outer extension block (32) and the first embedding section (421).

3. The automatic test system for a smart electric energy meter with dynamically selectable test modules according to claim 2, characterized in that: The built-in locking unit comprises a longitudinal built-in groove (51) provided inside the outer extension block (32), a built-in locking block (52) being slidably arranged in the built-in groove (51), and the built-in locking block (52) can slide longitudinally in the built-in groove (51), and the upper end of the built-in groove (51) is open and the lower end is a closed groove bottom; a locking through hole (53) is provided in the first embedded section (421), and when the outer extension block (32) extends into the inner positioning groove (4 3) when the inner positioning groove (43) is in contact with the bottom of the inner positioning groove (43), the locking through hole (53) corresponds to the position of the built-in locking block (52); a built-in spring (54) is compressed between the built-in locking block (52) and the bottom of the built-in groove (51), and the built-in spring (54) provides a driving force for the built-in locking block (52) to move upward, and the built-in locking block (52) can be inserted into the locking through hole (53) to achieve locking of the outer extension block (32) and the first embedded section (421); The upper left end of the built-in locking block (52) is provided with an oblique locking guide surface (521).

4. The automatic test system for a smart electric energy meter with dynamically selectable test modules according to claim 3, characterized in that: A first fixing block (61) is fixedly arranged on the right side of the built-in locking block (52), and a second fixing block (62) is fixedly arranged on the right side of the first fixing block (61), and the cross-sectional shapes of the first fixing block (61) and the second fixing block (62) are both right triangles; a left side wall of the built-in locking block (52) is in contact with the left inner wall of the built-in groove (51), and a right side wall of the second fixing block (62) is in contact with the right inner wall of the built-in groove (51); a built-in stopper (64) is fixedly arranged at the opening of the built-in groove (51) through a first inner locking piece (63), and the built-in stopper (64) can abut against the second fixing block (62) to limit the built-in locking block (52); A recessed cavity (65) having a right-angled triangle cross-section is provided at the upper right corner of the second fixed block (62); a first inner channel (661) is provided between the fixed seat (31) and the outer extension block (32); a second inner channel (662) is provided between the fixed seat (31) and the first embedded section (421); a third inner channel (663) is provided in the fixed seat (31); the recessed cavity (65), the first inner channel (661), the second inner channel (662) and the third inner channel (663) are connected in sequence; cold air is introduced into the third inner channel (663) and can be guided into the recessed cavity (65); as the recessed cavity (65) expands, the built-in locking block (52) moves downward and disengages from the locking through hole (53).

5. The automatic test system for a smart electric energy meter with dynamically selectable test modules according to claim 4, characterized in that: A cold air passage (71) is provided in the fixing seat (31), and a relay pipe opening (72) is fixedly provided on the front end surface of the fixing seat (31), and a cold air duct (73) is provided between the relay pipe opening (72) and the cooling ring pipe (13); cold air is introduced into the cold air passage (71), and the cold air can be guided into the cooling ring pipe (13).

6. The automatic test system for a smart electric energy meter with dynamically selectable test modules according to claim 5, characterized in that: An upper slot (81) is provided at the upper end of the fixing seat (31), a switching conductive seat (82) is inserted into the upper slot (81), and an indicating arrow (821) indicating the insertion direction of the switching conductive seat (82) is provided on the front end face of the switching conductive seat (82); a guide hole (83) is provided in the switching conductive seat (82), the upper end of the guide hole (83) serves as an inlet and extends to the upper end face of the switching conductive seat (82), and the lower end serves as an outlet and extends to the lower end face of the switching conductive seat (82); after the switching conductive seat (82) is inserted into the upper slot (81), the outlet of the guide hole (83) will only communicate with the third inner channel (663) or the cold air channel (71).

7. The automatic test system for a smart electric energy meter with dynamically selectable test modules according to claim 6, characterized in that: An upper extension section (84) is fixedly provided at the upper end of the switching conductive seat (82), and an access pipe opening (841) connected to the inlet of the guide hole (83) is provided in the upper extension section (84); an indicator block (842) is fixedly provided at one end of the upper extension section (84); When the switching conductive seat (82) is inserted into the upper slot (81), and the indicating block (842) is located at the leftmost position, the outlet of the guide hole (83) is connected to the third inner channel (663), and the cold air channel (71) is closed; When the switching conductive seat (82) is inserted into the upper end slot (81), and the indicating block (842) is located at the rightmost position, the outlet of the guide hole (83) is connected to the cold air duct (71), and the third inner channel (663) is closed.

8. The automatic test system for a smart electric energy meter with dynamically selectable test modules according to claim 7, characterized in that: A transverse slot (91) is provided in the fixing seat (31), and the transverse slot (91) is located on the left side of the upper slot (81). The left side of the transverse slot (91) is the slot bottom, and the right side is an opening and communicates with the upper slot (81). An ejection ball (92) and an ejection spring (93) are provided in the transverse slot (91), and the ejection spring (93) provides a driving force for the ejection ball (92) to move rightward, and the ejection ball (92) can maintain a state of partially extending out of the opening of the transverse slot (91). A limit seal block (95) is fixedly provided at the opening of the transverse slot (91), and the limit seal block (95) can be engaged with the upper slot (81). The pushing ball (92) contacts the pushing ball (92) to prevent the pushing ball (92) from completely falling out of the transverse groove (91); a first arc-shaped pushing inner surface (941) is provided on one side of the switching conductive seat (82), and a second pushing inner surface (942) is provided on the other side of the switching conductive seat (82) relative to the first pushing inner surface (941); when the outlet of the guide hole (83) is connected to the third inner channel (663), the pushing ball (92) just pushes into the first pushing inner surface (941); when the outlet of the guide hole (83) is connected to the cold air channel (71), the pushing ball (92) just pushes into the second pushing inner surface (942).

9. The automatic test system for a smart electric energy meter with dynamically selectable test modules according to claim 4, characterized in that: A sealing groove is provided on the upper end surface of the first embedded section (421), and a sealing ring (4211) is arranged in the sealing groove. The sealing ring (4211) can be in contact with the fixing seat (31) to prevent cold air from leaking in the second inner channel (662).

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