A portable fresh air supply system

Abstract

A portable fresh air supply system, comprising a fresh air supply part and a breathing mask connected through a connecting hose; the breathing mask comprises a mask body, a pair of goggles arranged on the mask body, a sealing silica gel layer arranged on the edge of the mask body, a one-way exhaust valve arranged on the lower side of the goggles on the mask body, and a separation partition plate arranged between the one-way exhaust valve and the goggles, the separation partition plate gradually thins from the middle to the edge, and the two sides are connected with the sealing silica gel layer respectively. The application uses the continuous air supply of the fresh air supply part, which does not exchange with the outside, but only exhausts waste gas, avoids blockage, and uses the sealing silica gel layer and the separation partition plate to separate the eyes and the mouth, avoid the fogging of the goggles, and improve the user experience.

Description

TECHNICAL FIELD

[0001] The application relates to a portable fresh air supply system. BACKGROUND

[0002] In some pollution-type industrial production processes, due to the process, equipment facilities and other reasons, toxic and harmful substances generated in the production process will be diffused to the workplace, which will harm the health of workers and lead to the occurrence of occupational diseases or occupation-related diseases. In order to protect the health of workers and create a safe and healthy working environment, direct protection of the terminal is an important and effective health protection measure.

[0003] There are two ways of direct protection. One is to use filtering materials to filter clean external air and discharge it into the interior to maintain respiration. The other is to use a self-generating protective cover that generates oxygen or air inside and then supplies it to the user. For the first method, there is a problem of blockage and filtering effect. For the second method, the main problem is the adjustment of internal and external pressure. Since there is no connection with the outside, it is easy to cause suffocation. SUMMARY

[0004] In order to solve the above problems, the application provides a portable fresh air supply system, which comprises a fresh air supply part and a breathing mask connected through a connecting hose; the breathing mask comprises a mask body, a pair of goggles arranged on the mask body, a sealing silica gel layer arranged on the edge of the mask body, a one-way exhaust valve arranged on the lower side of the goggles on the mask body, and a separation partition plate arranged between the one-way exhaust valve and the goggles; the separation partition plate gradually thins from the middle to the edge, and the two sides are connected with the sealing silica gel layer respectively. The application uses the fresh air supply part to continuously supply air or pure oxygen, which does not exchange with the outside, but only discharges waste gas to avoid blockage. The sealing silica gel layer and the separation partition plate can separate the eyes and the mouth, avoid the goggles from fogging, and improve the user experience.

[0005] Preferably, the sealing silica gel layer and the separation partition plate are made of the same material and comprise the following raw materials in mass fraction:

[0006] Silicone rubber: 80-100 parts; polytetrafluoroethylene powder: 1-2 parts; white carbon black: 4-6 parts; vulcanizing agent: 1-2 parts.

[0007] Preferably, the vulcanizing agent is di-tert-butyl peroxide.

[0008] Preferably, the particle size of the polytetrafluoroethylene micro powder is 5-10 μm; the polytetrafluoroethylene micro powder is treated in the following manner: the polytetrafluoroethylene micro powder and white carbon black are mixed by ball milling, then heated to 165-175℃ and maintained for 1-2 min to obtain the modified polytetrafluoroethylene micro powder; the particle size of the white carbon black is 10-50 nm.

[0009] Preferably, the silicone rubber, the modified polytetrafluoroethylene and the vulcanizing agent are blended at 160-200℃ for 20-30 min to obtain the extrusion raw material, the extrusion raw material is placed in an extrusion device, and the sealing silica gel layer is obtained by extrusion, the thickness of the sealing silica gel layer is 2-4 mm; the thickness of the separation partition is 5-8 mm. The polytetrafluoroethylene micro powder and white carbon black are used to adjust the strength of the silicone rubber in the application, and the negative effects of white carbon black on the vulcanization process of the silicone rubber are avoided as much as possible under the premise of improving the strength.

[0010] Preferably, the fresh air supply part comprises a compression cylinder, and a pressure stabilizing valve is connected to the connecting hose at the outlet end of the compression cylinder; at least two adjustable elastic bands are arranged on the cover body along the height direction. In the compression cylinder, only compressed air is generally placed, and the setting pressure of the pressure stabilizing valve is slightly higher than the atmospheric pressure.

[0011] Preferably, the connecting hose is internally provided with at least one arc-shaped groove extending along the longitudinal direction of the connecting hose, and the connecting hose is further provided with a reinforcing protrusion extending in parallel with the arc-shaped groove and staggered with the position of the arc-shaped groove; the number of the arc-shaped grooves is two, and the two arc-shaped grooves are oppositely arranged; the number of the reinforcing protrusions is two, and the two reinforcing protrusions are oppositely arranged. The connecting hose is designed in the design mode of the reinforcing protrusion cooperating with the arc-shaped groove in the application, so that when being extruded, the arc-shaped groove part is easy to deform as a position with weak strength, and the gas flow circulation effect in the connecting hose is ensured due to the staggered arrangement of the reinforcing protrusion, thereby avoiding the suffocation feeling of the user.

[0012] Preferably, the connecting hose is a silica gel-based flexible hose.

[0013] Preferably, the connecting hose comprises the following raw materials in mass fraction: silicone rubber: 80-100 parts; polyurethane: 60-80 parts; polytetrafluoroethylene micro powder: 3-5 parts; magnesium oxide: 10-20 parts; vulcanizing agent: 1-2 parts; coupling agent: 3-5 parts; the polytetrafluoroethylene micro powder is surface modified by magnesium oxide in the application, and the magnesium oxide can be integrated into the rubber system during the vulcanization process, thereby improving the integrity and ensuring the overall performance of the material.

[0014] The vulcanizing agent is di-tert-butyl peroxide; the coupling agent is KH550;

[0015] The particle size of the polytetrafluoroethylene micro powder is 5-10 μm.

[0016] The polytetrafluoroethylene micro powder is treated in the following manner: the polytetrafluoroethylene micro powder and magnesium oxide are ball-mixed, and then heated to 165-175 DEG C and maintained for 1-2 min to obtain modified polytetrafluoroethylene micro powder; the particle size of the magnesium oxide is not more than 30 nm;

[0017] Preferably, the polyurethane is placed into a rheometer at 160-200 DEG C, and after melting, the silicone rubber, modified polytetrafluoroethylene, vulcanizing agent and coupling agent are added and blended for 20-30 min to obtain extrusion raw material, which is placed into an extrusion device to obtain the connecting hose by extrusion;

[0018] The thickness of the connecting hose is 3-5 mm, and the height of the arc-shaped groove and the reinforcing protrusion is the same and is 5-10% of the thickness of the connecting hose.

[0019] The present application can bring the following beneficial effects:

[0020] 1. The present application uses the new air supply part to continuously supply air (or pure oxygen), which does not exchange with the outside, but only discharges waste gas, avoids blockage, and uses the sealing silica gel layer and the separation partition plate to separate the eyes and the mouth, avoids the fogging of the goggles part, and improves the user experience.

[0021] 2. The present application uses polytetrafluoroethylene micro powder and white carbon black to adjust the strength of the silicone rubber, which can improve the strength of the silicone rubber and avoid the negative effects of white carbon black on the vulcanization process of the silicone rubber.

[0022] 3. The connecting hose is designed to be matched with the arc-shaped groove, so that when it is squeezed, the arc-shaped groove part is easy to deform as a weak position, and because the reinforcing protrusion is staggered, the gas flow circulation effect in the connecting hose is ensured, and the user is prevented from feeling suffocated.

[0023] 4. The polytetrafluoroethylene micro powder is surface-modified by magnesium oxide, and the magnesium oxide can be integrated into the rubber system during the vulcanization process, thereby improving the integrity and ensuring the overall performance of the material. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0025] Fig. 1 It is a structural schematic diagram of the present application.

[0026] Fig. 2This is a schematic diagram of the protective shield.

[0027] Fig. 3 This is a schematic diagram of the air distribution hose. Detailed Implementation

[0028] To clearly illustrate the technical features of this solution, the following detailed description, in conjunction with the accompanying drawings, will be provided.

[0029] For the overall system, such as Figs. 1-3 As shown, the device includes a fresh air supply unit 1 and a breathing mask 3 connected to it via a connecting hose 2. The breathing mask 3 includes a mask body 4, on which a goggle 5 is mounted. A sealing silicone layer 6 is provided at the edge of the mask body 4. A one-way exhaust valve 7 is provided below the goggle 5 on the mask body 4. A separation partition 8 is provided between the one-way exhaust valve 7 and the goggle 5. The separation partition 8 gradually thins from the middle to the edge and is connected to the sealing silicone layer 6 on both sides. The fresh air supply unit 1 includes a compressor cylinder 9, and the outlet end of the compressor cylinder 9 is connected to the connecting hose 2 via a pressure regulating valve 10. At least two adjustable elastic bands 11 are provided on the mask body 4 along the height direction. The connecting hose 2 has at least one arc-shaped groove 12 extending longitudinally along the connecting hose 2. The connecting hose 2 also has reinforcing protrusions 13 that are staggered in position and parallel in extension direction to the arc-shaped groove 12. There are two arc-shaped grooves 12, which are arranged opposite to each other. There are two reinforcing protrusions 13, which are arranged opposite to each other.

[0030] The sealing silicone layer 6 and the separation partition 8 are made of the same material, comprising the following parts by weight of raw materials:

[0031] Silicone rubber: 80-100 parts; polytetrafluoroethylene powder: 1-2 parts; silica: 4-6 parts; vulcanizing agent: 1-2 parts.

[0032] The vulcanizing agent is di-tert-butyl peroxide.

[0033] The particle size of polytetrafluoroethylene (PTFE) micro powder is 5-10 μm.

[0034] The particle size of the silica is 10-50 nm.

[0035] It includes the following two steps:

[0036] S1. Pretreatment of polytetrafluoroethylene micro powder

[0037] The polytetrafluoroethylene (PTFE) micro powder is processed as follows: PTFE micro powder and silica are ball-milled and mixed, then heated to 165-175℃ and maintained for 1-2 minutes to obtain modified PTFE micro powder.

[0038] S2. Preparation of the silicone rubber material

[0039] The silicone rubber, the modified polytetrafluoroethylene, and the vulcanizing agent were blended at 160-200°C for 20-30 min to obtain an extrusion raw material. The extrusion raw material was placed into an extrusion device, and an extrusion was performed to obtain a sealing silicone layer. The thickness of the sealing silicone layer was 2-4 mm. The thickness of the separation partition was 5-8 mm.

[0040] In particular, the preparation was performed as follows:

[0041] Example 1:

[0042] S1. Pretreatment of the polytetrafluoroethylene micro powder

[0043] The 1 kg of polytetrafluoroethylene micro powder and 4 kg of white carbon black were ball-mixed, and then heated to 165°C for 2 min to obtain the modified polytetrafluoroethylene micro powder.

[0044] S2. Preparation of the silicone rubber material

[0045] The 80 kg of silicone rubber, the modified polytetrafluoroethylene, and the 1 kg of vulcanizing agent were blended at 160°C for 30 min to obtain an extrusion raw material. The extrusion raw material was placed into an extrusion device, and an extrusion was performed to obtain a sealing silicone layer. The thickness of the sealing silicone layer was 2 mm. The thickness of the separation partition was 5 mm.

[0046] It was determined that the Shore hardness was 35, and the tensile strength was 7.2 MPa.

[0047] Example 2:

[0048] S1. Pretreatment of the polytetrafluoroethylene micro powder

[0049] The 2 kg of polytetrafluoroethylene micro powder and 6 kg of white carbon black were ball-mixed, and then heated to 175°C for 1 min to obtain the modified polytetrafluoroethylene micro powder.

[0050] S2. Preparation of the silicone rubber material

[0051] The 100 kg of silicone rubber, the modified polytetrafluoroethylene, and the 2 kg of vulcanizing agent were blended at 200°C for 20 min to obtain an extrusion raw material. The extrusion raw material was placed into an extrusion device, and an extrusion was performed to obtain a sealing silicone layer. The thickness of the sealing silicone layer was 4 mm. The thickness of the separation partition was 8 mm.

[0052] It was determined that the Shore hardness was 31, and the tensile strength was 6.7 MPa.

[0053] In order to characterize the effect, the following comparative examples were prepared:

[0054] Comparative Example 1:

[0055] 100 kg of silicone rubber, 2 kg of polytetrafluoroethylene micro powder, 6 kg of white carbon black, and 2 kg of vulcanizing agent are blended at 200°C for 20 min to obtain an extrusion raw material. The extrusion raw material is placed in an extrusion device, and an extrusion is performed to obtain a sealing silica gel layer with a thickness of 4 mm. The thickness of the separation partition is 8 mm.

[0056] The Shore hardness thereof is 53, and the tensile strength is 4.1 MPa.

[0057] For the connecting hose, the connecting hose of the present application is a silica gel-based flexible hose. It is prepared in the following manner:

[0058] The raw materials include the following mass fractions: silicone rubber: 80-100 parts; polyurethane: 60-80 parts; polytetrafluoroethylene micro powder: 3-5 parts; magnesium oxide: 10-20 parts; vulcanizing agent: 1-2 parts; coupling agent: 3-5 parts.

[0059] The vulcanizing agent is di-tert-butyl peroxide.

[0060] The coupling agent is KH550.

[0061] The particle size of the polytetrafluoroethylene micro powder is 5-10 μm.

[0062] The particle size of the magnesium oxide is not more than 30 nm.

[0063] When preparing, two steps are included:

[0064] S1. Polytetrafluoroethylene micro powder pretreatment:

[0065] The polytetrafluoroethylene micro powder is treated in the following manner: the polytetrafluoroethylene micro powder and magnesium oxide are ball-mixed, and then heated to 165-175°C for 1-2 min to obtain modified polytetrafluoroethylene micro powder.

[0066] S2. Synthesis processing:

[0067] At 160-200°C, 60-80 parts of polyurethane are placed in a rheometer. After complete melting, silicone rubber, modified polytetrafluoroethylene, vulcanizing agent, and coupling agent are blended for 20-30 min to obtain an extrusion raw material. The extrusion raw material is placed in a pipe extruder, and an extrusion is performed to obtain a connecting hose. The thickness of the connecting hose is 3-5 mm. The height of the arc-shaped groove and the reinforcing protrusion is the same, and the height is 5%-10% of the thickness of the connecting hose.

[0068] When specifically preparing, the following manner is used:

[0069] Example 1:

[0070] S1. Polytetrafluoroethylene micro powder pretreatment:

[0071] The 3 kg of polytetrafluoroethylene powder, 10 kg of magnesium oxide were mixed by ball milling, and then heated to 165°C for 2 min to obtain the modified polytetrafluoroethylene powder.

[0072] S2. Synthesis processing:

[0073] At 160°C, the polyurethane was put into a rheometer, after melting, 80 kg of silicone rubber, modified polytetrafluoroethylene, 1 kg of di-t-butyl peroxide, 3 kg of KH550 were blended for 20 min to obtain an extrusion raw material. The extrusion raw material was put into a pipeline extruder, and a connecting hose was obtained by extrusion. The thickness of the connecting hose was 3 mm, the number of arc grooves and reinforcing protrusions was two, and they were oppositely arranged, the connecting line of the arc groove was perpendicular to the connecting line of the reinforcing protrusion, the height of the arc groove and the reinforcing protrusion was the same, and the height was 5% of the thickness of the connecting hose.

[0074] The connecting hose was placed on the horizontal plane, and a pressure block with an inclination angle of 20 degrees with the horizontal plane was placed thereon. The edge of the pressure block was aligned with the edge of the connecting hose, and the flow area at this time was 47% of the full flow area.

[0075] The connecting hose had good strength and flexibility, and after stretching one time, it returned without obvious change.

[0076] Example 2:

[0077] S1. Polytetrafluoroethylene powder pretreatment:

[0078] The 5 kg of polytetrafluoroethylene powder, 20 kg of magnesium oxide were mixed by ball milling, and then heated to 175°C for 1 min to obtain the modified polytetrafluoroethylene powder.

[0079] S2. Synthesis processing:

[0080] At 200°C, the polyurethane was put into a rheometer, after melting, 100 kg of silicone rubber, modified polytetrafluoroethylene, 2 kg of di-t-butyl peroxide, 5 kg of KH550 were blended for 30 min to obtain an extrusion raw material. The extrusion raw material was put into a pipeline extruder, and a connecting hose was obtained by extrusion. The thickness of the connecting hose was 5 mm, the number of arc grooves and reinforcing protrusions was two, and they were oppositely arranged, the connecting line of the arc groove was perpendicular to the connecting line of the reinforcing protrusion, the height of the arc groove and the reinforcing protrusion was the same, and the height was 10% of the thickness of the connecting hose.

[0081] The connecting hose was placed on the horizontal plane, and a pressure block with an inclination angle of 20 degrees with the horizontal plane was placed thereon. The edge of the pressure block was aligned with the edge of the connecting hose, and the flow area at this time was 53% of the full flow area.

[0082] The connecting hose has good strength and flexibility, and no obvious change is found after the length is stretched by one time and then retracted.

[0083] In order to characterize the effect, the following comparative examples are made:

[0084] Comparative example:

[0085] At 160℃, the polyurethane is put into a rheometer, after melting, 80kg of silicone rubber, 3kg of polytetrafluoroethylene powder, 10kg of magnesium oxide, 1kg of di-t-butyl peroxide, and 3kg of KH550 are added and blended for 20min to obtain an extrusion raw material. The extrusion raw material is put into a pipeline extruder, and a connecting hose is obtained by extrusion. The thickness of the connecting hose is 3mm, the number of arc grooves and reinforcing protrusions is two, and they are respectively oppositely arranged. The connecting line of the arc groove is perpendicular to the connecting line of the reinforcing protrusion. The height of the arc groove and the reinforcing protrusion is the same, and the height is 5% of the thickness of the connecting hose.

[0086] The connecting hose is placed on a horizontal plane, and a pressure block with an inclination angle of 20 degrees with the horizontal plane is placed thereon. The edge of the pressure block is aligned with the edge of the connecting hose. The flow area at this time is 35% of the full flow area.

[0087] The strength and flexibility of the connecting hose are worse than those of examples 1 and 2, and obvious fine lines appear on the surface after the length is stretched by one time.

[0088] The above is only an embodiment of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A portable fresh air supply system, characterized by: The new air supply part is connected with the breathing mask through a connecting hose; the breathing mask comprises a mask body, a goggle arranged on the mask body, a sealing silica gel layer arranged on the edge of the mask body, a one-way exhaust valve arranged on the lower side of the goggle on the mask body, and a separation partition plate arranged between the one-way exhaust valve and the goggle; the separation partition plate gradually thins from the middle to the edge, and the two sides are connected with the sealing silica gel layer respectively; The sealing silica gel layer and the separation partition plate are made of the same material, and comprise the following raw materials in mass fraction: Silicone rubber: 80-100 parts; polytetrafluoroethylene powder: 1-2 parts; white carbon black: 4-6 parts; vulcanizing agent: 1-2 parts; The polytetrafluoroethylene powder is treated in the following manner: the polytetrafluoroethylene powder and the white carbon black are ball-mixed, and then heated to 165-175 DEG C for 1-2 min to obtain modified polytetrafluoroethylene powder; The silicone rubber, the modified polytetrafluoroethylene powder and the vulcanizing agent are blended at 160-200 DEG C for 20-30 min to obtain an extrusion raw material; the extrusion raw material is placed in an extrusion device to obtain the sealing silica gel layer by extrusion; the thickness of the sealing silica gel layer is 2-4 mm; the thickness of the separation partition plate is 5-8 mm; The particle size of the polytetrafluoroethylene powder is 5-10 μm; the particle size of the white carbon black is 10-50 nm.

2. The portable fresh air supply system according to claim 1, characterized in that: The vulcanizing agent is di-t-butyl peroxide.

3. The portable fresh air supply system of claim 1, wherein: The new air supply part comprises a compression cylinder, and the outlet end of the compression cylinder is connected with the connecting hose through a pressure stabilizing valve; at least two adjustable elastic bands are arranged on the mask body along the height direction.

4. The portable fresh air supply system of claim 1, wherein: The connecting hose is internally provided with at least one arc-shaped groove extending along the longitudinal direction of the connecting hose, and is further provided with a reinforcing protrusion extending in parallel with the arc-shaped groove and staggered with the position of the arc-shaped groove; the number of the arc-shaped grooves is two, and the two arc-shaped grooves are oppositely arranged; the number of the reinforcing protrusions is two, and the two reinforcing protrusions are oppositely arranged.

5. The portable fresh air supply system of claim 4, wherein: The connecting hose is a silica gel-based flexible hose.

6. The portable fresh air supply system of claim 5, wherein: The connecting hose comprises the following raw materials in mass fraction: silicone rubber: 80-100 parts; polyurethane: 60-80 parts; polytetrafluoroethylene powder: 3-5 parts; magnesium oxide: 10-20 parts; vulcanizing agent: 1-2 parts; coupling agent: 3-5 parts; The vulcanizing agent is di-t-butyl peroxide; the coupling agent is KH550; The particle size of the polytetrafluoroethylene powder is 5-10 μm; The polytetrafluoroethylene powder is treated in the following manner: the polytetrafluoroethylene powder and the white carbon black are ball-mixed, and then heated to 165-175 DEG C for 1-2 min to obtain modified polytetrafluoroethylene powder; the particle size of the magnesium oxide is not more than 30 nm.

7. The portable fresh air supply system according to claim 6, characterized in that: The polyurethane is placed in a rheometer at 160-200 DEG C, and after complete melting, the silicone rubber, the modified polytetrafluoroethylene powder, the vulcanizing agent and the coupling agent are blended for 20-30 min to obtain an extrusion raw material; the extrusion raw material is placed in an extrusion device to obtain the connecting hose by extrusion; ​ ​ The thickness of the connecting hose is 3-5 mm, the height of the arc-shaped groove and the reinforcing protrusion is the same, and the height is 5%-10% of the thickness of the connecting hose.

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