Falling type metal detection system

By using a recycling component installation method in the drop-type metal detection system, the problem of powder accumulation during testing is solved, achieving simplified structure and efficient material recovery, avoiding component loss and operational complexity.

CN224263418UActive Publication Date: 2026-05-19THERMO FISHER SCI SHANGHAI INSTR CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
THERMO FISHER SCI SHANGHAI INSTR CO LTD
Filing Date
2025-06-11
Publication Date
2026-05-19

AI Technical Summary

Technical Problem

Existing drop-type metal detection systems suffer from powder accumulation during testing, and existing solutions are costly, cumbersome to operate, or prone to misplacement and loss.

Method used

The system employs a recycling component, including first and second mounting components and a receiving component. During testing, the receiving component is inserted into the recycling tube, and when not testing, it is positioned outside the recycling tube and secured with a locking mechanism to ensure unobstructed access inside the recycling tube.

Benefits of technology

This approach simplifies the structure, avoids powder accumulation, and reduces operational complexity and the risk of component loss without affecting pipeline flow.

✦ Generated by Eureka AI based on patent content.

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Abstract

A falling type metal detection system comprises a recovery pipe, a recovery opening is formed in the side wall of the recovery pipe, the falling type metal detection system is characterized by further comprising a recovery component, the recovery component comprises a first installation part and a receiving part, the first installation part is detachably installed on the outer side of the recovery pipe, and the receiving part is fixedly arranged relative to the first installation part; the receiving member is insertable into the recovery tube via the recovery opening for receiving the dropped object in the recovery tube, and is held by mounting the first mounting member to the outside of the recovery tube. The metal detection system can complete the holding of the receiver with a simple structure without affecting the internal profile of the tube.
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Description

Technical Field

[0001] This utility model relates to the field of materials testing, and more specifically to a drop-type metal detection system. Background Technology

[0002] Metal detectors (also known as "metal detectors") are mainly used to detect foreign metal objects mixed in during the production of items such as food, medicine, and plastic raw materials, and to automatically remove these foreign metal objects, thereby eliminating impurities from the production line.

[0003] Metal detectors are generally classified into three types according to the method of conveying the inspected items: tunnel-type metal detectors, drop-type metal detectors, and pipeline-type metal detectors. Among these types, drop-type metal detectors are widely used for detecting powdery or granular products, and they are characterized by simple installation, high sensitivity, and high efficiency.

[0004] Because the detection of powdered or granular products is required, the detection sensitivity of a fall-type metal detector is critical. To verify and calibrate the sensitivity of the fall-type metal detector, test ball testing is a key quality assurance step. In this test ball test, the test ball is inserted into the fall tube from the top inlet and falls. The size of the test ball can vary depending on the size of the fall tube and the detection requirements. After the test is completed, the test ball is caught by a receiver at the recovery port at the bottom of the product tube and recovered from the recovery port.

[0005] Since both the test ball during testing and the product in actual use are tested through a drop tube, this test ball test needs to meet the following conditions: During testing, the drop tube must be equipped with a receiving device (such as a drawer or grid) at the recycling opening to catch the test ball and prevent it from falling; when not testing, the product tube must be kept unobstructed at the recycling opening to avoid powder accumulation.

[0006] In existing technologies, the installation of grilles or drawers inside the pipe requires a supporting structure. However, small protrusions in this structure can obstruct the pipe flow, leading to powder accumulation. Furthermore, some current solutions employ complex slide rail mechanisms or interchangeable components. However, slide rail mechanisms are costly and cumbersome to operate, with difficulties in disassembly and cleaning; while multiple interchangeable components are prone to misplacement during use or loss when not in use.

[0007] Therefore, there is an urgent need for a simplified design that can meet testing requirements while avoiding powder accumulation during non-testing periods. Utility Model Content

[0008] To address the issue that existing drop-type metal detection systems cannot simultaneously maintain the integrity of the tube and keep the structure simple, this invention proposes a drop-type metal detection system that can retain the receiving component with a simple structure without affecting the internal contour of the tube.

[0009] Specifically, this fall-type metal detection system includes a retrieval tube with a retrieval opening on its side wall, and a retrieval component comprising: a first mounting member detachably mounted to the outside of the retrieval tube, and a receiving member fixed relative to the first mounting member. The receiving member is inserted into the retrieval tube through the retrieval opening to receive falling objects from the retrieval tube and is held in place by mounting the first mounting member to the outside of the retrieval tube. This fall-type metal detection system, using only the retrieval component, satisfies the requirement that the receiving member is located inside the retrieval tube during testing and outside the retrieval tube when not testing, while ensuring unobstructed flow within the retrieval tube.

[0010] Furthermore, this drop-type metal detection system also includes a second mounting component fixed relative to the first mounting component. The second mounting component is detachably mounted on the outside of the recovery tube, wherein when the second mounting component is installed in the recovery tube, the first mounting component and the receiving component are positioned on the outside of the recovery tube. The second mounting component allows the receiving component to be installed and secured on the outside of the recovery tube when not being tested, eliminating the need for additional storage space for the receiving component.

[0011] In one embodiment, the second mounting member and the receiving member are arranged on both sides of the first mounting member, wherein the second mounting member is positioned outside the recovery tube when the receiving member is positioned inside the recovery tube. Thus, during testing, the position of the second mounting member ensures that it does not affect the internal profile of the recovery tube.

[0012] Preferably, the first mounting member, the second mounting member, and the receiving member are formed as an integral component to avoid the problem of individual parts of the recycling component being omitted or lost.

[0013] In an embodiment of this invention, the receiving member includes a frame, the frame being shaped such that, when the first mounting member is installed into the recovery tube, the maximum horizontal distance between the frame and the inner surface of the recovery tube is less than the radius of the falling object. This limited distance between the frame and the inner surface of the recovery tube prevents falling objects (e.g., test balls) from becoming stuck between the inner surface of the recovery tube and the frame.

[0014] Furthermore, the receiving element also includes a stop formed within the frame, configured to prevent falling objects from passing through the frame. The stop is formed directly within the frame, eliminating the need for additional securing structures to hold it in place.

[0015] In one embodiment, the stop includes at least one bar spaced apart from each other, the bars being configured such that the maximum horizontal spacing between adjacent bars or between the bar closest to the frame and the frame is less than the diameter of the falling object, thus addressing the stop's ability to receive falling objects. Using bars requires less material compared to grilles or panels.

[0016] Preferably, the first and second mounting members have the same shape and are fixed together symmetrically. The identical shape has the advantage of ease of manufacture, and only the compatibility of one mounting member with the opening of the recovery pipe needs to be considered.

[0017] Preferably, at least one of the first and / or second mounting members is shaped to at least partially match the shape of the recovery tube, such that when installed into the recovery tube, the first and / or second mounting members substantially cover the recovery opening. This matching shape helps to address issues of increased space requirements in other cases, as well as sealing problems with the recovery opening.

[0018] In an embodiment of this invention, the falling metal detection system further includes a locking mechanism configured to fix and press one of the first and second mounting members to the recovery tube when the second mounting member is installed into the recovery tube. This locking mechanism is used to fix and seal the mounting members to the recovery tube.

[0019] Additional features and advantages of the described drop metal detection system will be set forth in the detailed description below, and will be recognized by those skilled in the art from the following description or from practice of the embodiments described herein, including the detailed description below and the accompanying drawings. Attached Figure Description

[0020] With reference to the above objectives, the technical features of this utility model are clearly described in the following claims, and its advantages will be apparent from the following detailed description with reference to the accompanying drawings, which illustrate preferred embodiments of the utility model by way of example, without limiting the scope of the inventive concept.

[0021] Figure 1 A schematic diagram of a falling metal detection system according to an embodiment of the present invention is shown.

[0022] Figure 2 A perspective view of the drop tube of a drop-type metal detection system according to an embodiment of the present invention is shown.

[0023] Figure 3 A perspective view of a recovery component of a falling metal detection system according to an embodiment of the present invention is shown.

[0024] Figure 4A partial perspective view of a falling metal detection system according to an embodiment of the present invention is shown, wherein a first mounting member for mounting a recovery component to the outside of a recovery tube is shown.

[0025] Figure 5 It shows Figure 4 Top view.

[0026] Figure 6 A partial perspective view of a falling metal detection system according to an embodiment of the present invention is shown, wherein a receiving component for receiving falling objects is shown in the recovery component.

[0027] Figure 7 A partial perspective view of a falling metal detection system according to an embodiment of the present invention is shown, wherein a second mounting member for mounting a recovery component to the outside of a recovery tube is shown.

[0028] Figure 8 It shows Figure 7 Top view.

[0029] Figure 9 A partial perspective view of a falling metal detection system according to an embodiment of the present invention is shown, in which the movement of the locking mechanism is illustrated.

[0030] Figure Labels

[0031] 1. Falling Metal Detection System

[0032] 2. Drop pipe

[0033] 3 Falling objects

[0034] 10 Recycling Tubes

[0035] 11 Recycling Opening

[0036] 12 protrusions

[0037] 100 Recycled Components

[0038] 110 First Installation Component

[0039] 111 First sealing gasket

[0040] 112 First Card Slot

[0041] 120 Second Installation Component

[0042] 111 Second sealing gasket

[0043] 122 Second Card Slot

[0044] 130 Acceptance Item

[0045] 131 Framework

[0046] 132 poles

[0047] 200 Locking Mechanism

[0048] 201 Rotary Pin

[0049] 202 Screw

[0050] 203 Knob Detailed Implementation

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention in any way.

[0052] This utility model relates to a drop-type metal detection system, which includes a recovery component for receiving a test ball. The recovery component has different installation methods to ensure unobstructed flow within the pipe during and when not testing. It should be understood that the recovery component can be adjusted as needed to receive other dropped objects besides the test ball. Furthermore, the recovery component is not limited to drop-type metal detection systems but can also be applied to other systems with pipes having openings in their sidewalls.

[0053] The directional terms "up," "down," "vertical," and "horizontal" used in this article are all based on... Figure 1 It is described by the directions shown.

[0054] For ease of explanation, the term "falling object" as used herein is assumed to have a spherical shape to facilitate the description of its size; however, those skilled in the art should understand that, in reality, the shape of a falling object is not necessarily spherical.

[0055] For ease of understanding, any “tube” and “bar” used herein are considered to have a cylindrical outer profile, and the hollow channel of the “tube” is also considered to have the same circular cross-section (in the unprocessed case). However, those skilled in the art will understand that in other cases, tubes and bars may have any shape other than cylindrical.

[0056] Furthermore, the terms “unobstructed” or “does not affect the internal profile” used in this paper to describe the interior of a pipe mean that, viewed from above, the cross-sectional area inside the vertical pipe is not reduced, i.e., there are no protruding structures that make the cross-sectional area at a certain depth inside the pipe smaller than the cross-sectional area at other depths.

[0057] The "testing" scenario mentioned in this article refers to the situation where the recovery component needs to receive the falling object from the recovery tube, while the "non-testing" scenario refers to the situation where the product falls from the recovery tube and the recovery component needs to not obstruct the outline of the recovery tube.

[0058] The term “installed to the outside of the recycling tube” as used in this article may refer to a component that is at least partially in direct contact with the outer surface of the recycling tube, or it may refer to a component that has a joint with the outer surface of the recycling tube, meaning that the component is not necessarily in direct contact with the outer surface of the recycling tube.

[0059] The term “basic coverage” as used in this article includes both cases of complete coverage and cases where less than 10% of the area is not covered.

[0060] Furthermore, the terms "first" and "second" in this document may be used interchangeably without affecting the description of the embodiments described below.

[0061] For clarity, in each accompanying drawing, only one of the same parts is labeled.

[0062] Figure 1 A schematic diagram of a falling metal detection system 1 is shown, along with a falling conduit 2 for objects such as test balls to fall into. At the shortest point of the falling conduit 2 is a section for recovering the fallen object, referred to herein as the recovery conduit 10. Figure 2 As shown, the recovery tube 10 has an inner surface and an outer surface, and a recovery opening 11 is provided on its side wall, allowing the user to remove the fallen object from the recovery tube 10. To enable the removal of the fallen object, a recovery component 100 (see [reference needed]) is installed at the recovery opening 11 of the recovery tube 10. Figure 1 The recycling component 100 is configured to receive falling objects and, after receiving falling objects, allows the user to remove the recycling component 100 from the recycling tube 10 to recover the falling objects.

[0063] Figure 3A recovery component 100 of a falling metal detection system according to an embodiment of the present invention is shown. As shown, the recovery component 100 includes a first mounting member 110, a second mounting member 120, and a receiving member 130. The second mounting member 120 and the receiving member 130 are arranged on both sides of the first mounting member 110. The first mounting member 110 and the second mounting member 120 are each detachably mounted to the outside of the recovery tube 10. In the illustrated embodiment, the first mounting member 110, the second mounting member 120, and the receiving member 130 are formed as a single unit, i.e., the recovery component 100 is a single piece, to avoid the problem of possible omission or loss of the aforementioned parts of the recovery component. It should be understood that the first mounting member 110, the second mounting member 120, and the receiving member 130 can be arbitrarily combined. In another embodiment, the first mounting member 110 and the second mounting member 120 may be formed as a single piece (i.e., a single first mounting member 110), and the receiving member 130 is a separate component that can be assembled into the single piece. In another embodiment, the first mounting member 110 and the receiving member 130 may be formed as a single unit, and the second mounting member 120 is a separate component that can be assembled into the single unit. In yet another embodiment, the first mounting member 110, the second mounting member 120, and the receiving member 130 are all separate components that can be assembled together.

[0064] It should also be understood that, preferably, the first mounting member 110, the second mounting member 120, and the receiving member 130 are fixed relative to each other to enhance the structural strength of the recovery member 100, but this is not a limitation. In other embodiments, the first mounting member 110 and the second mounting member 120 may also be movable relative to each other, for example, they may be hinged relative to each other. These embodiments are also within the scope of this utility model disclosure.

[0065] The structure of the first mounting member 110, the second mounting member 120, and the receiving member 130 according to the embodiments shown in the accompanying drawings will be described below.

[0066] Reference Figure 4 and 5 The diagram illustrates the installation of the recovery component 100 and the recovery tube 10 during testing. In this configuration, the first mounting member 110 of the recovery component 100 is mounted to the outside of the recovery tube 10. When the first mounting member 110 is installed, the receiving member 130 is inserted into the recovery tube 10 via the recovery opening 11 to receive any falling debris from the recovery tube 10, and is held in place by mounting the first mounting member 110 to the outside of the recovery tube 10. Since the second mounting member 120 and the receiving member 130 are arranged on either side of the first mounting member 110, the second mounting member 120 is positioned to the outside of the recovery tube 10 when the receiving member 130 is positioned inside the recovery tube 10.

[0067] The shape of the first mounting member 110 is designed to at least partially match the shape of the recovery tube 10, specifically the outer surface of the recovery tube 10, so that when the first mounting member 110 is installed onto the recovery tube 10, the first mounting member 110 substantially covers the recovery opening 11 (note that the first mounting member 110 can completely cover the recovery opening 11 on its own, or it can completely cover the recovery opening 11 with the aid of other additional parts), to prevent leakage of fallen material from the recovery opening 11 before the recovery component 100 is removed, which helps meet sealing requirements during testing. The matching shape also helps save space. It should be understood that in other cases, the shape of the first mounting member 110 may also be designed to be unrelated to the shape of the recovery tube.

[0068] Furthermore, the first mounting component 110 has a first sealing gasket 111 (from... Figure 7 As can be clearly seen, for example, the resin layer bonded to the first mounting member 110, the maximum boundary of the first sealing gasket 111 is larger than the size of the recycling opening 11, and when the first mounting member 110 is installed to the recycling tube 10, the first sealing gasket 111 is positioned between the first mounting member 110 and the recycling tube 10, thereby sealing the recycling opening 11 to prevent leakage by pressing the first mounting member 110 against the outer surface of the recycling tube 10.

[0069] Return to reference Figure 2 To retain the first mounting member 110, a locking mechanism 200 is also provided on the recycling tube 10, which is configured to fix and press the first mounting member 110 to the recycling tube 10 when it is installed. Specifically, in this embodiment, the locking mechanism 200 is a rotary screw lock, including a protrusion 12 formed on the outer surface of the recycling tube 10. Preferably, there are two protrusions 12, which are spaced apart by the recycling opening 11, preferably spaced 180 degrees apart. A rotary pin 201 rotatable about a vertical axis is installed in each protrusion 12, and one end of a screw 202 is screwed into a threaded hole (not shown) of the rotary pin 201, so that the screw 202 can rotate about the vertical axis together with the rotary pin 201. A generally triangular knob 203 is installed at the other end of the screw 202, which can be turned by the user, so that the knob 203 moves along the screw 202.

[0070] Reference Figure 4 and combined Figure 9 The first mounting member 110 has first slots 112 that match the number and shape of the screws 202. When the first mounting member 110 is installed into the recovery tube 10, the first mounting member 110 is close to the outer surface of the recovery tube 10, and then the screws 202 can rotate around the rotating pin 201 into the first slots 112 of the first mounting member 110 (e.g., Figure 8(As indicated by the arrow), then the knob 203 can be turned so that the knob 203 moves toward the first slot 112 of the first mounting member 110 and presses firmly against the first mounting member 110. At this time, the first mounting member 110 is locked and held by the locking mechanism 200, and the aforementioned first sealing gasket functions to seal the recycling opening.

[0071] It should be understood that the construction of the rotary screw lock is not limited, and those skilled in the art can modify the number of rotary screw locks, the spacing of the protrusions 12, the length of the screw, the shape of the knob, etc., as needed without exceeding the scope of this utility model. It should also be understood that the type of locking mechanism 200 is not limited, and any locking mechanism capable of pressing the first mounting member 110 (and the second mounting member 120 described below) tightly against the outer surface of the recovery tube 10 can achieve a seal between the mounting member and the recovery tube 10.

[0072] Continue to refer to Figure 4 and combined Figure 5 and 6 The detailed construction of the receiving member 130 is shown. Specifically, during testing, the receiving member 130 is connected via the recovery opening 11 (see [reference]). Figure 2 The receiver 110 is inserted into the recovery tube 10, while the first mounting member 110 and the second mounting member 120 are completely outside the recovery tube 10. The receiver 130 includes a frame 131. Figure 5 As shown, the frame 131 is designed such that when the first mounting member 110 is installed into the recovery tube 10, the maximum horizontal distance 'a' between the frame 131 and the inner surface of the recovery tube 10 is less than the radius of the falling object 3. This prevents the falling object 3 from getting stuck between the inner surface of the recovery tube 10 and the frame 131.

[0073] Continue to refer to Figure 4-6 The receiving member 130 also includes a stop formed in the frame 131. The stop, directly formed in the frame 131, avoids the need for additional fixing structures to secure the stop. In this embodiment, the stop is at least one bar 132 spaced apart from each other, configured such that the maximum horizontal distance b between adjacent bars or between the bar closest to the frame and the frame is less than the diameter of the falling object 3, preventing the falling object 3 from passing through the frame 131 and falling out of the recovery tube 10. During recovery, as... Figure 6 As shown, the recovery component 100 is removed from the recovery tube, and then the fallen object 3 can be recovered from the receiving component 130.

[0074] It should be understood that although the bars 132 are configured to be parallel to each other in this embodiment, this is not a limitation, and in other embodiments, the bars 132 may be configured to be non-parallel to each other, and even in another embodiment, the bars 132 may be configured such that their central axes are not coplanar. It should also be understood that although the bars 132 are preferably cylindrical, other shapes of bars, such as triangular prisms, are not excluded. Furthermore, in this embodiment, the stop uses bars 132 to save more material, but the stop can be unrestricted to include other structures besides bars 132, such as grilles or panels, which may be individual or in combination, and all fall within the scope of this invention.

[0075] Reference Figure 7-9 This diagram illustrates the installation of the recovery component 100 and the recovery tube 10 when not under testing. In this configuration, the second mounting member 120 of the recovery component 100 is mounted to the outside of the recovery tube 10. When the second mounting member 120 is installed, the first mounting member 110 and the receiving member 130 are positioned on the outside of the recovery tube 10 and held in place by mounting the second mounting member 120 to the outside of the recovery tube 10. In other words, the first mounting member 110, the second mounting member 120, and the receiving member 130 are all positioned on the outside of the recovery tube 10. Thus, when not under testing, the entire recovery component 100 does not affect the internal contour of the recovery tube, while the recovery tube 10 still holds the recovery component 100, eliminating the need for additional storage space to house the recovery component 100.

[0076] The second mounting member 120 and the first mounting member 110 have the same shape and are symmetrically fixed together. The identical shape has the advantage of ease of manufacture, and only requires that the first mounting member 110 can match the recovery opening 11 of the recovery pipe 10 (see...). Figure 2 Therefore, the second mounting member 120 must match the recovery opening 11 of the recovery tube 10. In this embodiment, the shape of the second mounting member 120 at least partially matches the outer surface of the recovery tube 10, such that when the second mounting member 120 is installed on the recovery tube 10, the second mounting member 120 substantially covers the recovery opening 11 (similar to the first mounting member 110, the second mounting member 120 itself can completely cover the recovery opening 11, or it can completely cover the recovery opening 11 with the help of other additional parts), to prevent the falling object from leaking from the recovery opening 11 before the recovery member 100 is removed, and to save space and improve sealing. Similarly, in other cases, the shape of the second mounting member 120 can also be designed to be independent of the shape of the recovery tube.

[0077] Furthermore, the second mounting component 120 has a second sealing gasket 121 (from... Figure 4As can be clearly seen, for example, the resin layer bonded to the second mounting member 120, the maximum boundary of the second sealing gasket 121 is larger than the size of the recycling opening 11, and when the second mounting member 120 is installed to the recycling tube 10, the second sealing gasket 121 is positioned between the second mounting member 120 and the recycling tube 10, thereby sealing the recycling opening 11 to prevent leakage by pressing the second mounting member 120 against the outer surface of the recycling tube 10.

[0078] Similarly, as Figure 8 and 9 As shown, the second mounting component 120 has a second slot 122. When the second mounting component 120 is installed into the recycling tube 10, the locking mechanism 200 and the second slot 122 can be used to fix and press the second mounting component 120 into the recycling tube 10.

[0079] The above describes the fall-type metal detection system of this utility model, which includes a recovery component. During testing, a receiving component is inserted into the recovery opening by installing a first mounting piece connecting the recovery component to the outside of the recovery tube, thus achieving the reception of the fall. When not testing, the receiving component is positioned on the outside of the recovery tube by installing a second mounting piece connecting the recovery component to the outside of the recovery tube, thereby not affecting the internal contour of the recovery tube. Furthermore, the simple structure of the recovery component allows for easy disassembly, and the integrated construction of the recovery component avoids problems such as incorrect placement or loss of parts.

[0080] While the structure of this utility model has been described above with reference to preferred embodiments, those skilled in the art should recognize that the above examples are merely illustrative and should not be construed as limiting the utility model. Therefore, modifications and variations can be made to this utility model, and all such modifications and variations will fall within the scope defined by the appended claims.

Claims

1. A falling metal detection system (1), comprising a recovery tube (10), wherein the recovery tube (10) has a recovery opening (11) on its side wall. characterized in that It also includes a recycling component (100), which comprises: A first mounting member (110) is detachably mounted to the outside of the recovery pipe (10), and A receiving member (130) is fixedly disposed relative to the first mounting member (110). The receiving member (130) can be inserted into the recycling tube (10) through the recycling opening (11) to receive the falling object in the recycling tube (10) and is held by mounting the first mounting member (110) to the outside of the recycling tube (10).

2. The falling metal detection system (1) as described in claim 1, characterized in that, It also includes a second mounting member (120) which is fixedly disposed relative to the first mounting member (110). The second mounting member (120) is detachably mounted on the outside of the recycling tube (10). When the second mounting member (120) is installed on the recycling tube (10), the first mounting member (110) and the receiving member (130) are positioned on the outside of the recycling tube (10).

3. The falling metal detection system (1) as described in claim 2, characterized in that, The second mounting member (120) and the receiving member (130) are arranged on both sides of the first mounting member (110), wherein when the receiving member (130) is positioned inside the recycling tube (10), the second mounting member (120) is positioned outside the recycling tube (10).

4. The falling metal detection system (1) as described in claim 2, characterized in that, The first mounting member (110), the second mounting member (120), and the receiving member (130) are formed as an integral component.

5. The falling metal detection system (1) as described in claim 1, characterized in that, The receiving member (130) includes a frame (131) whose shape is designed such that, when the first mounting member (110) is installed into the recovery tube (10), the maximum horizontal distance between the frame and the inner surface of the recovery tube (10) is less than the radius of the falling object.

6. The falling metal detection system (1) as described in claim 5, characterized in that, The receiving member (130) also includes a stop formed in the frame (131) that is configured to prevent the falling object from passing through the frame (131).

7. The falling metal detection system (1) as described in claim 6, characterized in that, The stop includes at least one bar (132) spaced apart from each other, the bar (132) being configured such that the maximum horizontal distance between adjacent bars or between the bar closest to the frame (131) and the frame is less than the diameter of the falling object.

8. The drop-through metal detection system (1) according to claim 2, characterized in that, said first mounting member (110) and said second mounting member (120) have the same shape and are fixed symmetrically to each other.

9. The drop-through metal detection system (1) according to claim 2, characterized in that, at least one of said first mounting member (110) and / or said second mounting member (120) is shaped to at least partially match the shape of said recovery pipe (10) such that, when mounted to said recovery pipe (10), said first mounting member (110) and / or said second mounting member (120) substantially covers said recovery opening (11).

10. The drop-through metal detection system (1) according to claim 2, characterized in that, further comprising a locking mechanism (200) configured to secure and compress one of said first mounting member (110) and said second mounting member (120) to said recovery pipe (10) when said one is mounted to said recovery pipe (10).