Magnetic pole metal detection device

Abstract

The invention discloses a magnetic pole metal detection device, which comprises a detection core, and the detection core comprises a detection body which is internally provided with a containing cavity; the power supply module is arranged at the first opening in one end of the accommodating cavity and is fixedly connected with the detection body; one end of the fixing rod extends into the accommodating cavity from the second opening in the other end of the accommodating cavity and is connected with the power supply module; the number of the metal conductors is at least three, each metal conductor is arranged on the side, away from the fixing rod, of the annular magnetic pole and protrudes out of the surface of the annular magnetic pole, and each metal conductor is embedded between the two annular magnetic poles, between the annular magnetic pole and the detection body and between the annular magnetic pole and the fixing rod; the annular magnetic poles are arranged between the two metal conductors, the number of the annular magnetic poles is at least two, and the alarm module is used for generating an alarm signal when a closed loop is formed among the power supply module, the detection body, the fixing rod and the metal conductors.

Description

Technical Field

[0001] The present application belongs to the field of metal detection, and in particular to a magnetic pole metal detection device. Background Art

[0002] Existing turboprop engines and turboshaft engines are generally equipped with metal chip warning devices to monitor the wear of engine parts during use.

[0003] However, in actual use, due to the presence of excess metal shavings generated during the processing of the engine, the detection device often sounds an alarm due to the adsorption of metal debris that was not cleaned up during the processing of the complex engine casing. This alarm signal is not an alarm signal caused by abnormal wear of engine parts during use, but it causes the user to terminate the task and return home early, causing user complaints. In the existing alarm device, an annular magnetic pole is set between two metal conductors. The surface of the annular magnetic pole is an insulator, and the conductor is connected to the alarm device. When the metal powder generated during the operation of the engine is adsorbed by the annular magnetic pole, it will adhere to the surface of the insulator to form a conductor, so that the two conductors are connected to form a loop, triggering the alarm device to alarm. However, since the excess materials generated during the processing will also be adsorbed by the annular magnetic pole on the surface of the insulator, connecting the two metal conductors and triggering the alarm, this alarm device has the defects of large detection error and inaccuracy.

[0004] At present, the detection method for metal debris in the industry usually includes magnetic poles to adsorb and detect metal debris, among which, the patent with publication number CN105298647A proposes an aircraft engine lubricating oil monitoring structure and method. The structure includes a shell, an insulating sleeve, a fusible piece, a gasket, a sealing ring, an insulating bushing, a stop ring, an electrode, a magnet, and an outer sleeve. The No. 3 pin in the cable plug is connected to the magnet, the No. 2 pin in the cable plug is connected to the outer sleeve, the magnet is fixed in the outer sleeve, the outer sleeve and the insulating sleeve connected to each other are connected to the shell, and the fusible piece, the gasket, the sealing ring, the insulating bushing and the electrode are installed from the inside to the outside in sequence inside the outer sleeve and outside the magnet. The fusible piece, the gasket, the sealing ring, the insulating bushing and the electrode are fixed by the stop ring in the electrode clamp groove. The present invention realizes the simultaneous monitoring of magnetic metal scraps and oil temperature in the oil by setting magnetic poles and fusible pieces, and can be connected to the online detection system, which can be applied to the monitoring of lubricating oil in key parts of various models of engines.

[0005] The above patent uses magnets to absorb metal chips in lubricating oil, but it cannot identify whether the metal chips are generated during the processing or caused by wear. Summary of the invention

[0006] The present application provides a magnetic pole metal detection device, which improves the accuracy of metal debris detection.

[0007] According to a first aspect of the present application, the present application provides a magnetic pole metal detection device, comprising:

[0008] The detection core comprises: a detection body, wherein a receiving cavity is formed inside the detection body;

[0009] A power supply module, which is arranged at a first opening at one end of the accommodating cavity and is fixedly connected to the detection body;

[0010] A fixing rod, one end of which extends from a second opening at the other end of the accommodating cavity into the accommodating cavity and is connected to the power supply module, and the fixing rod is connected to the detection body through an insulating member;

[0011] Metal conductors, the number of which is at least three, each of which is arranged on a side of the annular magnetic pole away from the fixed rod and protrudes from the surface of the annular magnetic pole, and each of which is respectively embedded between two annular magnetic poles, between the annular magnetic pole and the detection body, and between the annular magnetic pole and the fixed rod;

[0012] An annular magnetic pole, the annular magnetic pole is arranged between two metal conductors, the number is at least two, and each annular magnetic pole is arranged in parallel on the end of the fixing rod away from the power supply module, each annular magnetic pole protrudes from the outer surface of the fixing rod, and an insulating member is wrapped on the outer surface of each annular magnetic pole;

[0013] The alarm module is connected to the power supply module and is used to generate an alarm signal when a closed loop is formed between the power supply module, the detection body, the fixing rod and the metal conductor.

[0014] Optionally, the power supply module includes:

[0015] power supply;

[0016] A wiring board, a wiring board cover is arranged at the first opening of the detection core, and a power source is arranged at a side of the wiring board away from the accommodating cavity and connected to the wiring board to supply power to the wiring board;

[0017] The detection body and the fixing rod are respectively connected to the wiring board through wires.

[0018] Optionally, the intervals between adjacent annular magnetic poles are equal, and each annular magnetic pole protrudes from one side of the fixing rod and is flush.

[0019] Optionally, the number of annular magnetic poles is 3, and the spacing between adjacent annular magnetic poles is 3 mm.

[0020] Optionally, the height of each metal conductor protruding from the surface of the annular magnetic pole is equal.

[0021] Optionally, an end of the fixing rod away from the accommodating cavity forms an abutment platform, and a metal conductor is embedded between the abutment platform and the annular magnetic pole.

[0022] Optionally, the detection core further includes:

[0023] An insulating mounting plate, a mounting platform is formed in the accommodating cavity of the detection body, the insulating mounting plate is mounted on the mounting platform, and one end of the fixing rod extending into the accommodating cavity is fixedly connected with the insulating mounting plate.

[0024] Optionally, it also includes:

[0025] The protective cover is provided with a detection cavity inside, the detection cavity is provided with a detection port, the detection core extends into the detection cavity from the detection port, and the protective cover and the detection core are detachably connected.

[0026] Optionally, an oil inlet is formed at one end of the protective cover away from the detection port, and an oil outlet is formed at one end of the protective cover close to the detection port.

[0027] Optionally, the protective cover further comprises:

[0028] A control valve is connected to the protective cover and is arranged in the detection cavity. When the detection core is extended into the detection cavity, the control valve opens;

[0029] An elastic member is arranged in the detection cavity, one end of the elastic member is connected to the protective cover, and the other end of the elastic member is connected to the control valve, and is used to close the control valve when the detection core leaves the detection cavity.

[0030] The technical solution provided by this application brings at least the following beneficial effects:

[0031] The embodiment of the present application provides a magnetic pole metal detection device, including a detection core, which includes: a detection body, which has a accommodating cavity formed therein; a power supply module, which is arranged at a first opening of the accommodating cavity and fixedly connected to the detection body; a fixing rod, one end of the fixing rod extends from a second opening of the accommodating cavity into the accommodating cavity and is connected to the power supply module, and the fixing rod is connected to the detection body through an insulating member; an annular magnetic pole, wherein there are a plurality of annular magnetic poles, and each annular magnetic pole is arranged in parallel on an end of the fixing rod away from the power supply module, each annular magnetic pole protrudes from the outer surface of the fixing rod, and an insulating member is wrapped on the outer surface of each annular magnetic pole; there are a plurality of metal conductors, each metal conductor is arranged on a side of the annular magnetic pole away from the fixing rod and protrudes from the surface of the annular magnetic pole, and each metal conductor is respectively embedded between two annular magnetic poles, between the annular magnetic pole and the detection body, and between the annular magnetic pole and the fixing rod; an alarm module, which is connected to the power supply module and is used to generate an alarm signal when a closed loop is formed between the power supply module, the detection body, the fixing rod and the metal conductor. Since there are at least three metal conductors, the annular magnetic poles between the metal conductors must be connected at the same time to generate an alarm signal. Since the metal debris in the processing process is in the shape of curled wires or long strips, and the excess generated during the operation of the engine is metal powder, the metal powder will be adsorbed on the insulating part on the surface of the annular magnetic pole, so that a large amount of metal powder gathers together to become a conductor, and a closed loop is formed between the metal powder and the metal conductor, the detection body and the fixing part, thereby the circuit is turned on, and the alarm module and the closed loop are in a series relationship, so when the closed loop is turned on, the alarm module will send an alarm signal; for the metal debris, since it is in the shape of a wire or a long strip, it will be adsorbed by one of the annular magnetic poles, although it can conduct two of the metal conductors, but since there are at least three metal conductors and at least two annular magnetic poles, the other metal conductor is not conducted and will not trigger the alarm device. Therefore, the device realizes the detection of metal powder, and does not alarm the metal debris of the excess in the processing, thereby improving the accuracy of the detection of metal debris during the operation of the engine. In principle, the more conductors there are, the more accurate the detection of powdery excess matter will be. However, considering factors such as spatial layout, three metal conductors and two annular magnetic poles can also meet the basic requirements.

[0032] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0034] Figure 1is a schematic structural diagram of a detection core in a magnetic pole metal detection device according to an exemplary embodiment;

[0035] Figure 2 The figure is a schematic structural diagram of a protective cover in a magnetic pole metal detection device according to an exemplary embodiment.

[0036] Reference numerals

[0037] Label name Label name 110 Detection core 111 Detection body 1111 Accommodation cavity 1112 Mounting table 112 Power supply module 1121 power supply 1122 Terminal Blocks 113 Fixed rod 1131 Butt station 114 Insulation 115 Ring pole 116 Metal conductor 117 Alarm module 118 Insulation mounting plate 120 Protective cover 1201 Detection chamber 1202 Inspection port 121 Oil inlet 122 Oil outlet 123 Control valve 124 Elastic parts DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0040] Based on this, the present application provides a magnetic pole metal detection device. The magnetic pole metal detection device provided in the embodiment of the present application is first introduced below.

[0041] Embodiment 1;

[0042] Figure 1 A schematic structural diagram of a detection core in a magnetic pole metal detection device provided by an embodiment of the present application is shown.

[0043] like Figure 1 As shown, the magnetic pole metal detection device of the present application includes a detection core 110, and the detection core 110 includes:

[0044] A detection body 111, wherein a receiving cavity 1111 is formed inside the detection body 111;

[0045] A power supply module 112, which is disposed at a first opening at one end of the accommodating cavity 1111 and is fixedly connected to the detection body 111;

[0046] A fixing rod 113, one end of which extends from a second opening at the other end of the accommodating cavity 1111 into the accommodating cavity 1111 and is connected to the power supply module 112, and the fixing rod 113 is connected to the detection body 111 through an insulating member 114;

[0047] Annular magnetic poles 115, the annular magnetic poles 115 are arranged between two metal conductors 116, the number is two or more, and each annular magnetic pole 115 is arranged in parallel on one end of the fixing rod 113 away from the power supply module 112, each annular magnetic pole 115 protrudes from the outer surface of the fixing rod 113, and the outer surface of each annular magnetic pole 115 is wrapped with an insulating member 114;

[0048] The metal conductor 116 is three or more in number, each of which is disposed on a side of the annular magnetic pole 115 away from the fixed rod 113 and protrudes from the surface of the annular magnetic pole 115, and each of which is respectively embedded between two annular magnetic poles 115, between the annular magnetic pole 115 and the detection body 111, and between the annular magnetic pole 115 and the fixed rod 113;

[0049] The alarm module 117 is connected to the power supply module 112 and is used to generate an alarm signal when a closed loop is formed between the power supply module 112 , the detection body 111 , the fixing rod 113 and the metal conductor 116 .

[0050] Based on the above embodiment, the detection body 111 is metal, and a accommodating cavity 1111 is formed therein. The power supply module 112 is covered at the first opening of the accommodating cavity 1111, and the power supply module 112 is connected to the detection body 111. As an example, in order to facilitate the replacement and disassembly of the power supply module 112, the power supply module 112 can be set to be detachably connected to the detection body 111.

[0051] The fixing rod 113 is also a metal rod. The fixing rod 113 extends into the accommodating cavity 1111 from the second opening of the accommodating cavity 1111, and the power supply module 112 is connected to the fixing rod 113. An insulating member 114 is provided between the fixing rod 113 and the detection body 111. The fixing rod 113 and the detection body 111 are connected by the insulating member 114, and no loop is formed between the two.

[0052] By setting a plurality of annular magnetic poles 115, the annular magnetic poles 115 are sleeved on one end of the fixed rod 113 away from the power supply module 112, and the plurality of annular magnetic poles 115 are not located in the accommodating cavity 1111, and the annular magnetic poles 115 are protruded from the outer surface of the fixed rod 113, so that the annular magnetic poles 115 can better absorb metal powder and metal debris. Metal powder refers to metal powder generated by mechanical wear during the friction movement of the machine, and metal debris refers to tiny debris left over from the metal machine during the processing process. The difference between metal debris and metal powder is that the length and size of metal debris are much larger than metal powder.

[0053] Moreover, the outer surface of the annular magnetic pole 115 is wrapped with an insulating member 114 , so that there is no electrical conduction between the annular magnetic pole 115 and the metal conductor 116 .

[0054] It should be noted that the annular magnetic pole 115 can be a permanent magnet or an electromagnet.

[0055] A metal conductor 116 is further provided on the side of the metal annular magnetic pole 115 away from the fixed rod 113, and the metal conductor 116 is embedded between two adjacent annular magnetic poles 115, between the annular magnetic pole 115 and the fixed rod 113, and between the annular magnetic pole 115 and the detection body 111, and the fixed rod 113 and the detection body 111 are both connected to the power supply device, and the fixed rod 113 and the detection body 111 are isolated by an insulating member 114, and the fixed rod 113 and the detection body 111 can only be indirectly connected through the metal conductor 116 and the annular magnetic pole 115, but the outer surface of the annular magnetic pole 115 is provided with an insulating member 114, thereby, the fixed rod 113, the detection body 111, the metal conductor 116 and the annular magnetic pole 115 cannot form a closed loop. Since there are three or more metal conductors 116, the annular magnetic poles 115 between the metal conductors 116 must be connected at the same time to generate an alarm signal. Since the metal debris in the processing process is in the shape of curled wires or long strips, and the excess material generated during the operation of the engine is metal powder, the metal powder will be adsorbed on the insulating member 114 on the surface of the annular magnetic pole 115, so that a large amount of metal powder gathers together to become a conductor, and a closed loop is formed between the metal powder and the metal conductor 116, the detection body 111 and the fixing member. As a result, the circuit is turned on, and the alarm module 117 is in series with the closed loop. Therefore, when the closed loop is turned on, the alarm module 117 will send an alarm signal; for the metal debris, since it is in the shape of a wire or a long strip, it will be adsorbed by one of the annular magnetic poles 115. Although two of the metal conductors 116 can be turned on, since there are at least three metal conductors 116 and at least two annular magnetic poles 115, the other metal conductor 116 is not turned on and will not trigger the alarm device. Therefore, the device can detect metal powders, but will not alarm for metal debris in the process, thereby improving the accuracy of metal debris detection during engine operation. In principle, the more conductors there are, the more accurate the detection of powdery waste is, but considering factors such as space layout, three metal conductors 116 and two annular magnetic poles 115 can also meet the basic requirements.

[0056] It should be noted that the specific time required for the alarm information to be considered as caused by metal powder is set by the inspector according to the standard.

[0057] Optionally, the power supply module 112 includes:

[0058] Power supply 1121;

[0059] A wiring board 1122, the wiring board 1122 is covered at the first opening, and a power source 1121 is arranged at a side of the wiring board 1122 away from the accommodating cavity 1111 and connected to the wiring board 1122 to supply power to the wiring board 1122;

[0060] The detection body 111 and the fixing rod 113 are respectively connected to the wiring board 1122 through wires.

[0061] The power supply module 112 can effectively prevent external objects or personnel from directly contacting the electrical components in the accommodating cavity 1111 by covering the wiring board 1122 at the first opening, thereby reducing the risk of electric shock or short circuit and improving the safety of the overall device. At the same time, the power supply 1121 is arranged on the side of the wiring board 1122 away from the accommodating cavity 1111, which is also convenient for the inspection personnel to replace the power supply 1121, thereby improving the convenience of operation.

[0062] Optionally, the intervals between adjacent annular magnetic poles 115 are equal, and each annular magnetic pole 115 protrudes from one side of the fixing rod 113 and is flush.

[0063] Setting the adjacent annular magnetic poles 115 at equal intervals can reduce the possibility that metal debris is accidentally directly adsorbed to the surface of the annular magnetic pole 115, thereby causing the closed circuit to be unable to conduct. Moreover, since the two annular magnetic poles 115 are set to protrude from one side of the fixing rod 113 and are set to be flush when the position is fixed, the distance between the two adjacent annular magnetic poles 115 is minimized, and metal debris cannot be accommodated in the area between the two metal conductors 116 (that is, the size of the area is determined by the outer surface of the annular magnetic pole 115), thereby reducing the possibility that metal debris is accidentally directly adsorbed to the surface of the annular magnetic pole 115, thereby improving the accuracy of detecting metal debris.

[0064] Preferably, in one example, the number of the annular magnetic poles 115 is 3, and the interval between adjacent annular magnetic poles 115 is 3 mm.

[0065] Optionally, the height of each metal conductor 116 protruding from the surface of the annular magnetic pole 115 is equal, so that the side of each metal conductor 116 away from the annular magnetic pole 115 is also flush. Therefore, the possibility of metal debris being accidentally adsorbed directly to the surface of the annular magnetic pole 115 can be reduced, thereby improving the accuracy of detecting metal debris.

[0066] Example 2.

[0067] In order to improve the structural stability of the magnetic pole metal detection device.

[0068] Optionally, an abutment platform 1131 is formed at one end of the fixing rod 113 away from the accommodating cavity 1111, and a metal conductor 116 is embedded between the abutment platform 1131 and the annular magnetic pole 115. By forming the abutment platform 1131 at one end of the fixing rod 113 away from the accommodating cavity 1111, the contact area between the metal conductor 116 and the fixing rod 113 is enlarged, so that the metal conductor 116 can be more stably arranged between the abutment platform 1131 and the annular magnetic pole 115.

[0069] Optionally, the detection core 110 further includes:

[0070] An insulating mounting plate 118 and a mounting platform 1112 are formed in the accommodating cavity 1111 of the detection body 111. The insulating mounting plate 118 is mounted on the mounting platform 1112. One end of the fixing rod 113 extends into the accommodating cavity 1111 and is fixedly connected to the insulating mounting plate 118.

[0071] By providing an insulating mounting plate 118 and installing the insulating mounting plate 118 on the mounting platform 1112, the stable installation of the fixing rod 113 at one end in the accommodating cavity 1111 is ensured, and a closed loop is avoided between the fixing rod 113 and the detection body 111, thereby further improving the structural stability of the magnetic pole metal detection device.

[0072] The above-mentioned embodiment 2 can achieve all the implementation methods and beneficial effects of embodiment 1, which will not be described in detail here.

[0073] Embodiment 3:

[0074] In order to better protect the detection core 110, Figure 2 FIG. 1 is a schematic diagram showing the structure of a protective cover in a magnetic pole metal detection device provided by an embodiment of the present application. Figure 2 As shown,

[0075] Optionally, the magnetic pole metal detection device further includes:

[0076] The protective cover 120 has a detection cavity 1201 disposed therein, the detection cavity 1201 has a detection port 1202, the detection core 110 extends into the detection cavity 1201 from the detection port 1202, and the protective cover 120 and the detection core 110 are detachably connected.

[0077] By providing a protective cover 120 and extending the detection core 110 from the detection port 1202 into the detection cavity 1201 for protection, the possibility of damage to the structure of the detection core 110 caused by the external environment can be reduced. At the same time, the protective cover 120 and the detection core 110 are arranged to be detachably connected, so that the detection core 110 can be disassembled and used more conveniently to detect metal debris.

[0078] Optionally, an oil inlet 121 is formed at one end of the protection cover 120 away from the detection port 1202 , and an oil outlet 122 is formed at one end of the protection cover 120 close to the detection port 1202 .

[0079] By setting the oil inlet 121 and the oil outlet 122 on the protective cover 120, the lubricating oil can flow into the detection chamber 1201 from the oil inlet 121, and the detection core 110 can be used to detect whether there are metal debris in the lubricating oil, and the lubricating oil after detection can flow out of the oil outlet 122 and return to the oil circuit, thereby achieving the convenience of lubricating oil detection.

[0080] Optionally, the protective cover 120 further includes:

[0081] A control valve 123, which is connected to the protective cover 120 and is disposed in the detection cavity 1201. When the detection core 110 extends into the detection cavity 1201, the control valve 123 opens;

[0082] The elastic member 124 is disposed in the detection chamber 1201 , one end of the elastic member 124 is connected to the protective cover 120 , and the other end of the elastic member 124 is connected to the control valve 123 , and is used to close the control valve 123 when the detection core 110 leaves the detection chamber 1201 .

[0083] By setting the control valve 123, when the detection core 110 is extended into the detection cavity 1201, the detection core 110 overcomes the elastic potential energy to control the control valve 123 to open, so that the lubricating oil can enter from the oil inlet 121 and exit from the oil outlet 122, thereby realizing the detection of the lubricating oil; after the detection core 110 leaves the detection cavity 1201, the elastic member 124 restores the elastic potential energy, so that the control valve 123 is closed, thereby realizing the closure of the lubricating oil passage in the detection cavity 1201, preventing the lubricating oil from entering the detection cavity 1201, and improving the lubricating oil transmission efficiency.

[0084] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A magnetic pole metal detection device, characterized in that: The invention comprises a detection core, wherein the detection core comprises: A detection body, wherein a receiving cavity is formed inside the detection body; A power supply module, the power supply module is arranged at a first opening at one end of the accommodating cavity and connected to the detection body; A fixing rod, one end of which extends from a second opening at the other end of the accommodating cavity into the accommodating cavity and is connected to the power supply module, and the fixing rod is connected to the detection body through an insulating member; A metal conductor, the number of which is at least three, each of which is disposed on a side of the annular magnetic pole away from the fixed rod and protrudes from the surface of the annular magnetic pole, and each of which is respectively embedded between two annular magnetic poles, between the annular magnetic pole and the detection body, and between the annular magnetic pole and the fixed rod; an annular magnetic pole, the annular magnetic pole is arranged between the two metal conductors, the number is at least two, and each of the annular magnetic poles is arranged in parallel on the end of the fixing rod away from the power supply module, each of the annular magnetic poles protrudes from the outer surface of the fixing rod, and the outer surface of each annular magnetic pole is wrapped with the insulating member; An alarm module is connected to the power supply module and is used to generate an alarm signal when a closed loop is formed between the power supply module, the detection body, the fixing rod and the metal conductor.

2. The magnetic pole metal detection device according to claim 1, characterized in that: The power supply module comprises: power supply; A wiring board, wherein the wiring board cover is arranged at the first opening, and the power supply is arranged at a side of the wiring board away from the accommodating cavity and connected to the wiring board to supply power to the wiring board; The detection body and the fixing rod are respectively connected to the wiring board through wires.

3. The magnetic pole metal detection device according to claim 1, characterized in that: The spacing between adjacent annular magnetic poles is equal, and each annular magnetic pole protrudes from one side of the fixing rod and is flush.

4. The magnetic pole metal detection device according to claim 3, characterized in that: The number of the annular magnetic poles is 3, and the spacing between adjacent annular magnetic poles is 3 mm.

5. The magnetic pole metal detection device according to claim 3, characterized in that: The height of each metal conductor protruding from the surface of the annular magnetic pole is equal.

6. The magnetic pole metal detection device according to claim 1, characterized in that: An end of the fixing rod away from the accommodating cavity forms an abutment platform, and a metal conductor is embedded between the abutment platform and the annular magnetic pole.

7. The magnetic pole metal detection device according to claim 1, characterized in that: The detection core also includes: An insulating mounting plate, wherein the detection body forms a mounting platform in the accommodating cavity, the insulating mounting plate is mounted on the mounting platform, and one end of the fixing rod extending into the accommodating cavity is fixedly connected to the insulating mounting plate.

8. The magnetic pole metal detection device according to any one of claims 1 to 7, characterized in that: Also includes: A protective cover is provided with a detection cavity inside the protective cover, the detection cavity is provided with a detection port, the detection core extends into the detection cavity from the detection port, and the protective cover is detachably connected to the detection core.

9. The magnetic pole metal detection device according to claim 8, characterized in that: An oil inlet is formed at one end of the protective cover away from the detection port, and an oil outlet is formed at one end of the protective cover close to the detection port.

10. The magnetic pole metal detection device according to claim 9, characterized in that: The protective cover also includes: A control valve, the control valve is connected to the protective cover and is arranged in the detection cavity, and when the detection core extends into the detection cavity, the control valve opens; An elastic member, wherein the elastic member is arranged in the detection cavity, one end of the elastic member is connected to the protective cover, and the other end of the elastic member is connected to the control valve, and is used for closing the control valve when the detection core leaves the detection cavity.

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