Sealing tank injection molding embedded nut structure

Abstract

The utility model is suitable for the technical field of air tightness and pressure-bearing performance of plastic parts, and provides an injection molding embedded nut structure for a sealed tank body, which is characterized in that a layer of plastic with the thickness of 1mm is added on the end surface of an embedded nut in a mounting hole on a convex block of the sealed tank body and the end surface of an air pipe joint for connecting to replace a sealing ring; axial sealing is changed into end face sealing, plastic replaces a sealing ring between the nut and the air pipe connector, and the sealing effect is achieved after fastening; the air tightness test is carried out on the product of the embodiment, the pressure intensity of the applied air pressure is 1.5 bar, the pressure maintaining test lasting for 24 hours is carried out, the result after the test meets the requirements that air leakage is kept under certain constant air pressure, the pressure bearing requirement is met, and the sealing between the air pipe connector and the flange connector meets the air tightness requirement.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding embedding, and particularly relates to a sealed tank body injection molding embedding nut structure. Background Art

[0002] Among plastic parts, for products or tanks with airtightness requirements, the connection between the air pipe joint and the plastic part is generally fastened and connected in the form of flange nuts, bolts and sealing rings to ensure that the connection part can withstand a certain atmospheric pressure without leakage. For some products with structural restrictions, in some plastic products, it is necessary to embed nuts in the plastic products. The purpose of embedding nuts is to use nuts to prefabricate threaded interfaces for plastic products. Most of them are directly embedded in plastic parts to form an integrated structure. The air pipe joint is directly connected to the plastic part in the form of threads.

[0003] In actual application, the conventional method of embedding nuts cannot ensure that the joint between the nut and the plastic part is effectively and tightly fitted due to factors such as the different shrinkage rates of the plastic part and the metal nut, and there is a significant risk of air leakage. Therefore, the utility model proposes a sealed tank body injection molding embedded nut structure to solve the above problem. Utility Model Content

[0004] The utility model provides a sealed tank body injection-molded embedded nut structure, which mainly solves the connection between the nut and the plastic part, and the sealing between the nut and the flange joints such as the air pipe joint to meet the airtight requirements and keep airtight under a certain constant atmospheric pressure.

[0005] The utility model is implemented as follows: a sealed tank body injection-molded embedded nut structure comprises a sealed tank body and a nut;

[0006] The sealed tank body is provided with a plurality of protrusions, each of which is provided with a mounting hole, and the mounting hole is connected to the inner space of the sealed tank body;

[0007] The nut is embedded in the mounting hole, the top surface of the nut is lower than the top surface of the mounting hole, and the bottom surface of the nut is flush with the bottom surface of the mounting hole.

[0008] Preferably, the sealed tank body and the raised block are integrally injection molded.

[0009] Preferably, the outer diameter of the nut is larger than the inner diameter of the mounting hole, and the nut is embedded and fixed in the mounting hole by interference fitting.

[0010] Preferably, a plastic with a thickness of 1 mm is provided between the top surface of the nut and the top surface of the mounting hole.

[0011] Preferably, the nut is externally connected to the trachea joint and is threadedly connected to the trachea joint.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] By adding a layer of plastic with a thickness of 1 mm to the end face of the nut embedded in the mounting hole on the raised block of the sealing tank body and the end face connected to the trachea joint to replace the sealing ring, the axial seal is changed to an end face seal, and the plastic replaces the role of the sealing ring between the nut and the trachea joint, and plays a sealing role after tightening; an air tightness test is carried out on the product of the embodiment, the pressure of the applied air pressure is 1.5 bar, and a pressure maintenance test is carried out for a duration of 24 hours. The results after the test meet the requirements of maintaining no air leakage under a certain constant air pressure and meeting the pressure bearing requirements, and the seal between the trachea joint and the flange joint meets the airtightness requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the overall structure in the embodiment;

[0015] Figure 2 It is a three-dimensional cross-sectional view of the overall structure in the embodiment;

[0016] Figure 3 for Figure 2 The enlarged front view at A in the middle;

[0017] Figure 4 It is a three-dimensional diagram of the overall structure in the comparative example;

[0018] Figure 5 It is a three-dimensional cross-sectional view of the overall structure in the comparative example;

[0019] Figure 6 for Figure 5 Enlarged front view at point B in the middle.

[0020] In the figure:

[0021] 1. Sealing tank body; 11. Raised block; 12. Mounting hole;

[0022] 2. Nut. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0025] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example:

[0029] See also Figures 1 to 3 The utility model provides a technical solution: a sealed tank body injection-molded embedded nut structure, comprising a sealed tank body 1 and a nut 2; a plurality of raised blocks 11 are provided on the sealed tank body 1, and a mounting hole 12 is opened on the raised block 11, and the mounting hole 12 is connected to the internal space of the sealed tank body 1; a nut 2 is embedded in the mounting hole 12, the top surface of the nut 2 is lower than the top surface of the mounting hole 12, and the bottom surface of the nut 2 is flush with the bottom surface of the mounting hole 12.

[0030] For further information, see Figure 1 and Figure 2 The sealed tank body 1 and the raised block 11 are integrally injection molded.

[0031] For further information, see Figure 3 The outer diameter of the nut 2 is larger than the inner diameter of the mounting hole 12, and the nut 2 is embedded and fixed in the mounting hole 12 by interference fitting.

[0032] For further information, see Figure 3 A plastic with a thickness of 1 mm is provided between the top surface of the nut 2 and the top surface of the mounting hole 12 .

[0033] Furthermore, the nut 2 is externally connected to the air pipe joint and is threadedly connected to the air pipe joint.

[0034] In this embodiment, a layer of plastic with a thickness of 1 mm is added to the end face of the nut 2 embedded in the mounting hole 12 on the raised block 11 of the sealing tank body 1, where it is connected to the trachea joint, to replace the sealing ring, and the axial seal is changed to an end face seal. The plastic replaces the sealing ring between the nut 2 and the trachea joint, and plays a sealing role after tightening. An air tightness test is carried out on the product of the embodiment, the pressure of the applied air pressure is 1.5 bar, and a pressure maintenance test is carried out for a duration of 24 hours. The results after the test meet the requirements of maintaining no air leakage under a certain constant air pressure and meeting the pressure bearing requirements, and the seal between the trachea joint and the flange joint meets the airtightness requirements.

[0035] Comparative Example:

[0036] See also Figures 4 to 6 A technical solution in the prior art: a sealed tank body injection-molded embedded nut structure, comprising a sealed tank body 1 and a nut 2; a plurality of raised blocks 11 are provided on the sealed tank body 1, and a mounting hole 12 is opened on the raised block 11, and the mounting hole 12 is connected to the internal space of the sealed tank body 1; a nut 2 is embedded in the mounting hole 12, and the top surface of the nut 2 is flush with the top surface of the mounting hole 12.

[0037] For further information, see Figure 4 and Figure 5 The sealed tank body 1 and the raised block 11 are integrally injection molded.

[0038] For further information, see Figure 6 The outer diameter of the nut 2 is larger than the inner diameter of the mounting hole 12, and the nut 2 is embedded and fixed in the mounting hole 12 by interference fitting.

[0039] Furthermore, the nut 2 is externally connected to the air pipe joint and is threadedly connected to the air pipe joint.

[0040] In this embodiment, for products or tanks with airtightness requirements, the connection between the air pipe joint and the plastic part is generally fastened and connected in the form of a flange nut 2 and a bolt plus a sealing ring to ensure that the connection part can withstand a certain atmospheric pressure without leakage. For some products with structural restrictions, the nut 2 is directly embedded in the plastic part to form an integrated structure, and the air pipe joint and the plastic part are directly connected in a threaded form.

[0041] Comparative Examples and Comparative Examples:

[0042] In the comparative example, the method of embedding the nut 2 cannot ensure that the joint between the nut 2 and the plastic part is effectively and tightly fitted due to factors such as the different shrinkage rates of the plastic part and the metal nut 2, and there is a significant risk of air leakage.

[0043] In the embodiment, a layer of plastic with a thickness of 1 mm is added to the end face where the original plastic part is embedded in the nut 2 and connected to the joint to replace the sealing ring, and the axial seal is changed to an end face seal. The plastic replaces the sealing ring between the nut 2 and the joint and plays a sealing role after tightening.

[0044] The working principle and use process of the utility model are as follows: a layer of plastic with a thickness of 1 mm is added to the end face of the nut 2 embedded in the mounting hole 12 on the raised block 11 of the sealing tank body 1, where the end face connected to the trachea joint is replaced by the sealing ring, and the axial seal is changed to an end face seal. The plastic replaces the role of the sealing ring between the nut 2 and the trachea joint, and plays a sealing role after tightening; an air tightness test is carried out on the product of the embodiment, the pressure of the applied air pressure is 1.5 bar, and a pressure holding test is carried out for a duration of 24 hours. The results after the test meet the requirements of maintaining no air leakage under a certain constant air pressure and meeting the pressure bearing requirements, and the seal between the trachea joint and the flange joint meets the airtightness requirements.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealed tank body injection-molded embedded nut structure, characterized in that: It comprises a sealed tank body (1) and a nut (2); The sealed tank body (1) is provided with a plurality of protruding blocks (11), the protruding blocks (11) are provided with mounting holes (12), and the mounting holes (12) are connected to the internal space of the sealed tank body (1); The nut (2) is embedded in the mounting hole (12), the top surface of the nut (2) is lower than the top surface of the mounting hole (12), and the bottom surface of the nut (2) is flush with the bottom surface of the mounting hole (12).

2. A sealed tank body injection-molded embedded nut structure according to claim 1, characterized in that: The sealed tank body (1) and the raised block (11) are integrally injection-molded.

3. The sealed tank body injection-molded embedded nut structure according to claim 2, characterized in that: The outer diameter of the nut (2) is greater than the inner diameter of the mounting hole (12), and the nut (2) is embedded and fixed in the mounting hole (12) by means of interference fitting.

4. The sealed tank body injection-molded embedded nut structure according to claim 1, characterized in that: Plastic with a thickness of 1 mm is provided between the top surface of the nut (2) and the top surface of the mounting hole (12).

5. The sealed tank body injection-molded embedded nut structure according to claim 1, characterized in that: The nut (2) is externally connected to the air pipe joint and is threadedly connected to the air pipe joint.

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