Wire harness sealing structure of biological safety cabinet

Abstract

The utility model discloses a wire harness sealing structure of a biological safety cabinet, which comprises a threading assembly arranged at the rear end of a safety cabinet body and used for penetrating a wire from the outside of the biological safety cabinet to the inside of the biological safety cabinet; and the plugging assembly is arranged in the safety cabinet body, is located on one side of the threading assembly, and is used for jacking and sealing the threading assembly. After the wires are preliminarily sealed, the wires penetrate through the arc-shaped grooves respectively, the pressing blocks are pressed on one side of the safety cabinet body and located between the limiting plates, the cross screws are inserted into the through holes and rotate, the cross screws abut against the pressing blocks through thread tangential force between the cross screws and the threaded holes, and therefore the wires can be tightly sealed. The pressing block tightly abuts against the limiting ring which is primarily sealed to one side of the safety cabinet body, so that the limiting ring and the safety cabinet body are further sealed, the lead which penetrates into the limiting ring is straightened through the arc-shaped groove, bending stress between the lead and the lantern ring is reduced, and the sealing performance of the cabinet body is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire harness sealing of biological safety cabinets, in particular to a wire harness sealing structure of a biological safety cabinet. Background Art

[0002] The biological safety cabinet is designed to protect the operator, the laboratory environment and the experimental materials when operating infectious experimental materials such as primary cultures, bacterial strains and diagnostic specimens, so as to avoid exposure to infectious aerosols and splashes that may be generated during the above operations. The principle is to filter out harmful substances through filters, and then discharge the filtered air out of the laboratory through the exhaust system and return part of it to the work surface, so as to reduce laboratory infections and cross-contamination of cultures caused by aerosol exposure, and protect the environment and prevent environmental pollution. In order to supply the basic power supply requirements in the biological safety cabinet, the power supply wires need to be passed from the outside of the biosafety cabinet to the inside.

[0003] However, in the prior art, the wires inside and outside the biosafety cabinet pass directly through the sealing plate at the rear end of the biosafety cabinet. A group of holes for passing the wires are reserved in the sealing plate. Since the wires are mostly multi-strand copper wires wrapped in a plastic sheath structure, gas can pass through the gaps between the multi-strand wires, and the sealing performance of the cabinet cannot be guaranteed. It is necessary to improve this defect.

[0004] The above content is only used to assist in understanding the technical solution of the present invention and does not mean that the above content is the closest prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a wiring harness sealing structure for a biological safety cabinet to solve the problem in the prior art of the biological safety cabinet proposed in the above background art that when the wires are inserted into the biological safety cabinet, gas can pass through the gaps between the multiple wires because the wires are mostly multi-strand copper wires wrapped in a plastic sheath structure, and the sealing performance of the cabinet cannot be guaranteed.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A wiring harness sealing structure for a biological safety cabinet, comprising:

[0008] The wire threading assembly is located at the rear end of the biosafety cabinet body and is used to pass the wires from the outside to the inside of the biosafety cabinet;

[0009] The blocking component is arranged inside the safety cabinet body and located on one side of the threading component, and is used to tighten and seal the threading component.

[0010] Furthermore, the threading assembly includes:

[0011] A plurality of ferrules are provided, one corresponding to each of the wires, and inserted into the rear end of the safety cabinet body. A reserved hole for accommodating the ferrules is provided inside the safety cabinet body;

[0012] A limiting ring, fixedly connected to one end of the collar located inside the safety cabinet body, for limiting one end of the collar;

[0013] The tapered portion is provided at one end of the collar located outside the safety cabinet body and is used for guiding the collar's threading process.

[0014] Furthermore, the blocking component includes:

[0015] A pressure block is provided on one side of the safety cabinet body and is used to compress and seal the limit ring. A through hole is provided in the middle of the pressure block, and a threaded hole corresponding to the through hole is provided at the rear of the safety cabinet body;

[0016] A cross screw is inserted into the through hole, and the cross screw is threadedly connected to the threaded hole to tighten the limiting ring.

[0017] Furthermore, the corners of the pressing block are provided with arc-shaped grooves corresponding to the reserved holes, which are used to limit and separate the multiple strands of the wires inserted into the ring;

[0018] The opening of the groove is smaller than the outer diameter of the collar.

[0019] Furthermore, limit plates are fixedly connected to the inner side of the safety cabinet body and located at the upper and lower ends of the pressing block, for limiting the angle of the pressing block.

[0020] Furthermore, a sealant is injected into the gap between the wire and the ring;

[0021] The gap between the limiting ring and the safety cabinet body is injected with sealant.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The utility model opens three reserved holes corresponding to three wires at the rear end of the safety cabinet body, thereby avoiding the gap caused by multiple wires passing through one hole at the same time, resulting in poor sealing performance.

[0024] 2. The utility model uses a pressing block to press the initially sealed limit ring against one side of the safety cabinet body, so that the limit ring and the safety cabinet body are further sealed, and the inserted wires are straightened through the arc groove, reducing the bending stress between the wires and the ring, further improving the sealing performance of the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a diagram showing the relationship between the conductor and the threading assembly of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the plugging component of the utility model;

[0029] Figure 5 This is a schematic diagram of the briquetting structure of the utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the threading assembly of the utility model.

[0031] Figure numerals: 100, safety cabinet body; 1001, reserved hole; 1002, threaded hole; 101, wire; 1, blocking assembly; 11, pressure block; 111, arc-shaped groove; 112, through hole; 12, limiting plate; 13, cross screw; 2, threading assembly; 21, collar; 22, limiting ring; 23, tapered portion. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figure 1-6 , the utility model provides a technical solution:

[0034] A wire harness sealing structure, used in the field of biological safety cabinets, includes:

[0035] The wire threading assembly 2 is provided at the rear end of the biosafety cabinet body 100 and is used to pass the wire 101 from the outside to the inside of the biosafety cabinet;

[0036] The blocking assembly 1 is arranged inside the safety cabinet body 100 and located on one side of the threading assembly 2, and is used to tightly seal the threading assembly 2.

[0037] As an improvement, Figure 1-2 , Figure 6 As shown, the threading assembly 2 includes:

[0038] The rings 21 are provided in multiple groups corresponding to the wires 101 and are inserted into the rear end of the safety cabinet body 100. The safety cabinet body 100 has a reserved hole 1001 inside for accommodating the rings 21.

[0039] A limiting ring 22 is fixedly connected to one end of the collar 21 located inside the safety cabinet body 100, and is used to limit one end of the collar 21;

[0040] The tapered portion 23 is provided at one end of the collar 21 outside the safety cabinet body 100 and is used to guide the insertion process of the collar 21 so as to facilitate the collar 21 to be inserted into the reserved hole 1001 .

[0041] Further, such as Figure 4-5 As shown, the blocking component 1 includes:

[0042] A pressure block 11 is provided on one side of the safety cabinet body 100 and is used to compress and seal the limit ring 22. A through hole 112 is provided in the middle of the pressure block 11, and a threaded hole 1002 corresponding to the through hole 112 is provided at the rear of the safety cabinet body 100.

[0043] The cross screw 13 is inserted into the through hole 112 , and the cross screw 13 is threadedly connected to the threaded hole 1002 to tighten the limiting ring 22 .

[0044] Furthermore, the corners of the pressing block 11 are provided with arc-shaped grooves 111 corresponding to the reserved holes 1001, which are used to limit and separate the multiple strands of the wires 101 inserted into the ring 21;

[0045] The opening of the groove is smaller than the outer diameter of the collar 21 .

[0046] The inner side of the safety cabinet body 100 and the upper and lower ends of the pressing block 11 are fixedly connected with limiting plates 12 for limiting the angle of the pressing block 11 .

[0047] In addition, the gap between the wire 101 and the collar 21 is injected with sealant;

[0048] The gap between the limiting ring 22 and the safety cabinet body 100 is injected with sealant.

[0049] It should be noted that: Figure 1-4 , Figure 6As shown, the present invention is explained by taking three wires 101 passing through the outside of the safety cabinet body 100 into the inside of the safety cabinet body 100 as an example. During the implementation process, each wire 101 is first passed through the ring 21 from the outside of the safety cabinet body 100 to the inside of the safety cabinet body 100, and then the gap between the wire 101 and the ring 21, and the gap between the limit ring 22 and the safety cabinet body 100 are respectively injected with sealant, so that the gap between the wire 101 and the ring 21 is preliminarily sealed, and the gap between the limit ring 22 and the safety cabinet body 100 is also preliminarily sealed. In addition, by opening three reserved holes 1001 corresponding to the three wires 101 at the rear end of the safety cabinet body 100, it is avoided that the gaps caused by the simultaneous penetration of multiple wires 101 through one hole cause poor sealing performance.

[0050] like Figure 1-5 As shown, in addition, after the wire 101 is preliminarily sealed, the utility model passes each wire 101 through the arc groove 111, and presses the pressure block 11 to one side of the safety cabinet body 100 and is located between the two sets of limit plates 12. By inserting the cross screw 13 into the through hole 112 and rotating it, the cross screw 13 presses the pressure block 11 through the thread tangential force between the thread and the threaded hole 1002, and the pressure block 11 presses the preliminarily sealed limit ring 22 to one side of the safety cabinet body 100, so that the limit ring 22 and the safety cabinet body 100 are further sealed, and the inserted wire 101 is straightened through the arc groove 111, reducing the bending stress between the wire 101 and the ring 21, and further improving the sealing performance of the cabinet.

[0051] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wiring harness sealing structure for a biological safety cabinet, characterized in that: include: A wire threading assembly (2) is provided at the rear end of the biosafety cabinet body (100) and is used to pass the wire (101) from the outside to the inside of the biosafety cabinet; The blocking component (1) is arranged inside the safety cabinet body (100) and located on one side of the threading component (2), and is used to tightly seal the threading component (2).

2. The wiring harness sealing structure of a biological safety cabinet according to claim 1, characterized in that: The threading assembly (2) comprises: A plurality of collars (21) are provided in a one-to-one correspondence with the wires (101) and are inserted into the rear end of the safety cabinet body (100). A reserved hole (1001) for accommodating the collars (21) is provided inside the safety cabinet body (100); A limiting ring (22) is fixedly connected to one end of the collar (21) located inside the safety cabinet body (100) and is used to limit one end of the collar (21); The tapered portion (23) is provided at one end of the collar (21) located outside the safety cabinet body (100) and is used to guide the threading process of the collar (21).

3. The wiring harness sealing structure of a biological safety cabinet according to claim 2, characterized in that: The blocking component (1) comprises: A pressure block (11) is provided on one side of the safety cabinet body (100) and is used to compress and seal the limit ring (22). A through hole (112) is provided in the middle of the pressure block (11), and a threaded hole (1002) corresponding to the through hole (112) is provided at the rear of the safety cabinet body (100); A cross screw (13) is inserted into the through hole (112), and the cross screw (13) is threadedly connected to the threaded hole (1002) to tighten the limiting ring (22).

4. The wiring harness sealing structure of a biological safety cabinet according to claim 3, characterized in that: The corners of the pressing block (11) are provided with arc-shaped grooves (111) corresponding to the reserved holes (1001) for limiting and separating the multiple strands of the wires (101) inserted into the ring (21); The opening of the groove is smaller than the outer diameter of the collar (21).

5. The wiring harness sealing structure of a biological safety cabinet according to claim 3, characterized in that: Limiting plates (12) are fixedly connected to the inner side of the safety cabinet body (100) and at the upper and lower ends of the pressing block (11), and are used to limit the angle of the pressing block (11).

6. The wiring harness sealing structure of a biological safety cabinet according to claim 2, characterized in that: The gap between the wire (101) and the ring (21) is injected with sealant; The gap between the limiting ring (22) and the safety cabinet body (100) is injected with sealant.

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