Anti-condensation closed valve

Abstract

The utility model discloses an anti-condensation closed valve, and belongs to the technical field of closed valves. The valve plate is arranged at one end of the cylindrical valve body, the power mechanism drives the valve plate to be opened and closed, the valve plate is a heat insulation valve plate, a knife edge is arranged on the outer side of the edge of the heat insulation valve plate, a sealing groove is formed in the end, matched with the valve plate in a sealing mode, of the valve body, and a foaming silica gel pad is arranged in the sealing groove. When the heat insulation valve plate is closed, the knife edge abuts against the foaming silica gel pad. The heat insulation valve plate is composed of two steel plates, and a heat insulation supporting piece and a heat insulation layer are arranged between the steel plates. By improving the heat insulation performance of the valve plate and improving the sealing structure of the valve plate and the valve body, effective sealing of the closed valve can be achieved, heat exchange inside and outside the closed valve can be effectively avoided, the heat insulation performance is better improved, the anti-condensation effect of the closed valve is really achieved, the service life is prolonged, and the service life of the closed valve is prolonged. The sealing valve is suitable for areas with large temperature difference and humidity inside and outside the sealing valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to airtight valve technical field especially relates to a kind of dew-proof airtight valve. BACKGROUND

[0002] Air valve is indispensable sealing accessory in the ventilation, air conditioning and air purification engineering of laboratory, industrial plant, civil building, mainly used for adjusting the air volume of ventilation duct, and can also be used for mixing adjustment of fresh air and return air.

[0003] The utility model discloses a safe airtight valve in the prior application of applicant, the safe airtight valve is good in airtight effect, and the opening and closing speed is fast, mainly used in high-risk laboratory environment, used for isolating airflow in biological laboratory, to meet the requirement of safety.But the safe airtight valve is high in cost, and does not have the function of heat insulation and dew prevention, not suitable for being used in the area of large temperature difference and high humidity.

[0004] Therefore, the above-mentioned safe airtight valve cannot meet the requirements of the area of large temperature difference and high humidity, and is high in cost, and needs to be further improved. How to create a new dew-proof airtight valve, improve the heat insulation performance on the basis of meeting the effective sealing of airtight valve, achieve the effect of dew prevention, reduce the cost, and expand the use range, has become the goal of improvement in this field. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem to provide a kind of dew-proof airtight valve, improve the heat insulation performance on the basis of meeting the effective sealing of airtight valve, achieve the effect of dew prevention, prolong service life, reduce the cost, expand the use range, to overcome the deficiency of the safe airtight valve of the prior art.

[0006] To solve the above technical problem, the utility model provides a kind of dew-proof airtight valve, including cylindrical valve body, valve plate being arranged in the one end of the cylindrical valve body, and the power mechanism of driving the valve plate opening and closing, the valve plate adopts heat insulation valve plate, the edge outside of the heat insulation valve plate is equipped with knife mouth, the end of the valve body and the valve plate sealing cooperation is equipped with sealing groove, the inside of the sealing groove is equipped with foamed silica gel pad, the knife mouth is abutted on the foamed silica gel pad when the heat insulation valve plate is closed.

[0007] Further improvement, the heat insulation valve plate includes two oppositely arranged first steel plate and second steel plate, and at least heat insulation support being arranged at the edge of the first steel plate and second steel plate, bolt fixedly connected two steel plates passes through the heat insulation support, the outer circumferential edge of the second steel plate is equipped with the knife mouth.

[0008] Further improvement, the heat insulation support adopts nylon strips with low thermal conductivity, and a plurality of the nylon strips are arranged between the first steel plate and the second steel plate.

[0009] Further improvement, a heat insulation layer is arranged between the first steel plate and the second steel plate.

[0010] Further improvement, the heat insulation layer adopts aerogel felt material.

[0011] Further improvement, the valve body adopts a square cylinder structure, a cylinder reinforcing rib is arranged on the outer wall of the valve body, and a valve plate reinforcing rib is arranged on the inner side of the valve plate.

[0012] Further improvement, the power mechanism comprises a motor, a transmission mechanism connected with the motor, and a rotating mechanism arranged in the valve body.

[0013] The motor is arranged on the outer wall of the valve body.

[0014] The transmission mechanism comprises a driving shaft, an upper connecting rod and a lower connecting rod, one end of the driving shaft is connected with the output shaft of the motor, the other end of the driving shaft extends into the valve body and is connected with the inner wall of the valve body through a bearing, one end of the upper connecting rod is fixed on the driving shaft, the other end of the upper connecting rod is hingedly connected with one end of the lower connecting rod, the other end of the lower connecting rod is hingedly connected with the inner side of the valve plate, when the driving shaft rotates under the driving of the motor, the upper connecting rod is driven to rotate, and then the lower connecting rod and the valve plate are driven to move.

[0015] The rotating mechanism comprises a guide rod and an angle guide groove, one end of the guide rod is fixed on the inner wall of the valve body, the other end of the guide rod extends to the center of the valve body, and the guide rod is arranged in parallel with the driving shaft; the middle part of the angle guide groove is provided with at least one obtuse angle inflection point, one end of the angle guide groove is fixed on the inner side of the valve plate, and the other end of the angle guide groove extends to the free end of the guide rod, so that the free end of the guide rod can slide along the angle guide groove in the movement of the valve plate, when the free end of the guide rod slides to the inflection point of the angle guide groove, the valve plate is driven to rotate, and the opening and closing adjustment of the valve plate is realized.

[0016] Further improvement, a guide shaft parallel to the driving shaft is fixed at the center of the inner side of the valve plate, two opposite guide grooves arranged along the axial direction of the valve body are arranged on the inner wall of the valve body, the two ends of the guide shaft extend into the guide grooves, the end of the lower connecting rod hingedly connected with the valve plate is hingedly connected with the guide shaft, and the end of the angle guide groove fixedly connected with the valve plate is fixedly connected with the guide shaft, when the valve plate moves under the driving of the motor, the guide shaft limits the sliding of the valve plate along the guide groove, and the valve plate rotates around the guide shaft under the action of the rotating mechanism.

[0017] Further improvement, the guide shaft is not in the same vertical plane with the driving shaft and the guide rod.

[0018] Further improvement, the connecting rod mechanism composed of the upper connecting rod and the lower connecting rod comprises two groups, which are symmetrically arranged on the driving shaft respectively, and the rotating mechanism comprises two groups, which are symmetrically arranged on the two sides of the two groups of connecting rod mechanisms respectively.

[0019] After adopting such design, the utility model has at least the following advantages:

[0020] 1. The utility model discloses a dewing prevention airtight valve improves the heat insulation performance of valve plate and the sealing structure of valve plate and valve body, can realize the effective sealing of airtight valve, effectively realizes the heat exchange of inside and outside airtight valve, better improves the heat insulation performance, truly reaches the dewing prevention effect of airtight valve, improves the service life, is suitable for being used in the area with big temperature difference and high humidity in the wind valve.

[0021] 2. Square cylindrical valve body is also adopted, the shape of the valve body is matched with the shape of square ventilation pipeline, is easy to install, saves the cost, has the advantages of big ventilation path area, big ventilation air volume and no dead angle.According to the size of the ventilation aperture, two sets of connecting rod mechanisms and two sets of rotating mechanisms are arranged, which can more effectively guarantee the opening and closing reliability of the valve plate. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above is only the summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, the utility model is further explained in detail in the following with the help of the drawings and the specific embodiment.

[0023] Figure 1 It is the longitudinal cut structure schematic diagram of the closing state of the dewing prevention airtight valve of the utility model.

[0024] Figure 2 It is the overhead structure schematic diagram of the closing state of the dewing prevention airtight valve of the utility model.

[0025] Figure 3 It is the transverse cut structure schematic diagram of the closing state of the dewing prevention airtight valve of the utility model.

[0026] Figure 4 It is the transverse cut structure schematic diagram of the opening state of the dewing prevention airtight valve of the utility model.

[0027] Figure 5 It is the overhead structure perspective view of the closing state of the dewing prevention airtight valve of the utility model. DETAILED DESCRIPTION

[0028] Refer to the drawings Figures 1 to 3As shown, the anti-condensation closed valve of the embodiment comprises a cylindrical valve body 1, a valve plate 2 arranged at the air outlet end of the cylindrical valve body 1, and a power mechanism for driving the valve plate 2 to open and close.

[0029] In order to achieve the anti-condensation effect, the closed valve of the embodiment needs to improve the heat insulation and sealing function of the closed valve. Specifically, the valve plate 2 of the closed valve is improved to be a heat insulation valve plate. The heat insulation valve plate comprises two oppositely arranged first and second steel plates 22 and 23, and at least one heat insulation support 24 arranged at the edge of the first and second steel plates 22 and 23, and the bolt 25 for fixing the two steel plates passes through the heat insulation support 24. In this way, the heat insulation valve plate composed of two layers of steel plates forms a heat insulation broken bridge, which can greatly improve the heat insulation performance of the existing valve plate. The heat insulation support 24 can also better avoid the heat transfer between the inside and outside of the valve plate caused by the metal bolt, and further achieve the effect of effective heat insulation.

[0030] In the embodiment, the heat insulation support 24 can be made of a material with low thermal conductivity, such as nylon, titanium alloy, etc. The first and second steel plates 22 and 23 are further provided with a plurality of heat insulation supports 24. As shown in the accompanying drawings, Figure 5 As shown, the plurality of heat insulation supports 24 are arranged in parallel to effectively support the first and second steel plates 22 and 23.

[0031] In order to further improve the heat insulation performance of the heat insulation valve plate, a heat insulation layer 26 is arranged between the first and second steel plates 22 and 23. The heat insulation layer 26 can be made of aerogel felt or rock wool material to further improve the heat insulation effect.

[0032] Referring again to the accompanying drawings, Figure 1 and 3 As shown, the edge of the heat insulation valve plate 2 is provided with a knife edge 21, such as the knife edge 21 arranged at the outer peripheral edge of the second steel plate 23. The end of the valve body 1 in sealing cooperation with the valve plate 2 is provided with a sealing groove 11. The sealing groove 11 is internally provided with a foamed silica gel pad 12. When the heat insulation valve plate 2 is closed, the knife edge 21 abuts against the foamed silica gel pad 12, forming a tight seal between the valve plate 2 and the valve body 1. In this way, the sealing part of the valve plate 2 and the valve body 1 not only achieves effective sealing, but also better improves the heat insulation performance, and truly achieves the anti-condensation effect of the closed valve.

[0033] In the embodiment, the valve body 1 adopts a rectangular cylindrical structure. The length of the air inlet and outlet at both ends of the cylindrical body can reach 2080mm, and the width can reach 710mm, having a large air passage area.

[0034] In order to ensure the firmness of the barrel structure, the outer wall of the valve body 1 is provided with barrel reinforcing ribs 13, such as barrel reinforcing ribs 13 which are connected in a head-to-tail manner around a circle of the barrel middle part, so as to ensure that the barrel structure is not deformed. Of course, the number and arrangement of the barrel reinforcing ribs 13 can be determined according to the actual barrel structure.

[0035] Moreover, the inner side of the valve plate 2 is provided with valve plate reinforcing ribs 27, such as the valve plate reinforcing ribs 27 shown in the attached drawings, which can improve the firmness of the valve plate, ensure that the valve plate is not deformed, improve the anti-condensation effect of the valve and prolong the service life of the valve. Figure 3 and 5 Moreover, the inner side of the valve plate 2 is provided with valve plate reinforcing ribs 27, such as the valve plate reinforcing ribs 27 shown in the attached drawings, which can improve the firmness of the valve plate, ensure that the valve plate is not deformed, improve the anti-condensation effect of the valve and prolong the service life of the valve.

[0036] Moreover, the inner side of the valve plate 2 is provided with valve plate reinforcing ribs 27, such as the valve plate reinforcing ribs 27 shown in the attached drawings, which can improve the firmness of the valve plate, ensure that the valve plate is not deformed, improve the anti-condensation effect of the valve and prolong the service life of the valve. Figures 1 to 4 Moreover, the inner side of the valve plate 2 is provided with valve plate reinforcing ribs 27, such as the valve plate reinforcing ribs 27 shown in the attached drawings, which can improve the firmness of the valve plate, ensure that the valve plate is not deformed, improve the anti-condensation effect of the valve and prolong the service life of the valve.

[0037] The motor 31 is arranged on the outer wall of the valve body 2. The transmission mechanism comprises a driving shaft 32, an upper connecting rod 33 and a lower connecting rod 34. One end of the driving shaft 32 is connected with the output shaft of the motor 31, and the other end of the driving shaft 32 extends into the valve body 2 through a shaft sleeve and is connected with the inner wall of the valve body through a bearing 28. One end of the upper connecting rod 33 is fixed on the driving shaft 32, and the other end of the upper connecting rod 33 is hinged with one end of the lower connecting rod 34. The other end of the lower connecting rod 34 is hinged with the inner side of the valve plate 2. When the driving shaft 32 rotates under the drive of the motor 31, the upper connecting rod 33 is driven to rotate, and then the lower connecting rod 34 and the valve plate 2 are driven to move.

[0038] Preferably, the connecting rod mechanism composed of the upper connecting rod 33 and the lower connecting rod 34 comprises two groups which are symmetrically arranged on the driving shaft 32, so as to ensure that the driving shaft 32 drives the valve plate 2, and the opening and closing of the valve plate is safer and more reliable.

[0039] The rotating mechanism comprises a guide rod 35 and an angle guide groove 36. One end of the guide rod 35 is fixed on the inner wall of the valve body 1, and the other end of the guide rod 35 extends to the center of the valve body 1. The guide rod 35 is arranged in parallel with the driving shaft 32. The middle part of the angle guide groove 36 has at least one obtuse corner point. One end of the angle guide groove 36 is fixed on the inner side of the valve plate 2, and the other end of the angle guide groove 36 extends to the free end of the guide rod 35, so that the free end of the guide rod 25 can slide along the angle guide groove 36 during the movement of the valve plate 2. When the free end of the guide rod 35 slides to the corner point of the angle guide groove 36, the valve plate 2 is driven to rotate, so as to realize the opening and closing of the valve plate 2. Figure 3 A cross-sectional structure schematic view of the anti-condensation closed valve in a closed state is shown. Figure 4 A cross-sectional structure schematic view of the anti-condensation closed valve in an open state is shown.

[0040] Preferably, the valve plate 2 is fixed with a guide shaft 29 parallel to the driving shaft 32 at the center of the inner side, and the inner wall of the valve body 1 is provided with two opposite guide grooves 14 arranged along the axial direction of the valve body 1. The two ends of the guide shaft 29 respectively extend into the guide grooves 14. The end of the lower connecting rod 34 hinged to the valve plate 2 is hinged to the guide shaft 29, and the end of the angle guide groove 36 fixedly connected to the valve plate 2 is fixedly connected to the guide shaft 29. In this way, when the valve plate 2 moves under the driving of the motor 31, the guide shaft 29 limits the sliding of the valve plate 2 along the guide grooves 14, and the valve plate 2 rotates around the guide shaft 29 under the action of the guide rod 35 and the angle guide groove 36, thereby realizing the opening degree adjustment of the valve plate 2.

[0041] In addition, the guide shaft 29, the driving shaft 32 and the guide rod 35 are not in the same vertical plane in the embodiment, which is beneficial to the opening of the valve plate 2 and is more scientific and reliable.

[0042] In addition, the sealing valve of the embodiment can also include two groups of the rotating mechanism according to the size of the cylinder and the length of the vent hole, which are symmetrically arranged on the two sides of the two groups of the connecting rod mechanism, so as to ensure the effective rotation of the large-size valve plate 2 and achieve more effective opening and closing control.

[0043] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Those skilled in the art can make some simple modifications, equivalent changes or modifications by using the above disclosed technical content, which are all within the protection scope of the present application.

Claims

1. A condensation-preventing airtight valve, comprising a cylindrical valve body, a valve plate disposed at one end of the cylindrical valve body, and a power mechanism for driving the valve plate to open and close, characterized in that, The valve plate adopts a heat insulation valve plate, an edge outside of the heat insulation valve plate is provided with a knife edge, an end of the valve body in sealing cooperation with the valve plate is provided with a sealing groove, the sealing groove is internally provided with a foamed silica gel pad, and the knife edge abuts on the foamed silica gel pad when the heat insulation valve plate is closed.

2. The anti-condensation closed valve according to claim 1, characterized in that, The heat insulation valve plate comprises two oppositely arranged first and second steel plates and at least a heat insulation support arranged at edges of the first and second steel plates, a bolt for fixing and connecting the two steel plates passes through the heat insulation support, and a peripheral edge of the second steel plate is provided with the knife edge.

3. The anti-condensation closed valve according to claim 2, characterized in that, The heat insulation support adopts nylon strips with low thermal conductivity, and a plurality of the nylon strips are further arranged between the first and second steel plates.

4. The anti-condensation closed valve according to claim 2, wherein A heat insulation layer is further arranged between the first and second steel plates.

5. The anti-condensation closed valve according to claim 4, characterized in that, The heat insulation layer adopts aerogel felt material.

6. The anti-condensation, hermetic valve of claim 1, wherein, The valve body adopts a square cylinder structure, a cylinder reinforcing rib is arranged on an outer wall of the valve body, and a valve plate reinforcing rib is further arranged on an inner side of the valve plate.

7. The anti-condensation closed valve according to any one of claims 1 to 6, characterized in that, The power mechanism comprises a motor, a transmission mechanism connected with the motor and a rotating mechanism arranged inside the valve body. The motor is arranged on an outer wall of the valve body. The transmission mechanism comprises a driving shaft, an upper connecting rod and a lower connecting rod, one end of the driving shaft is connected with an output shaft of the motor, the other end of the driving shaft extends into the valve body and is connected with an inner wall of the valve body through a bearing, one end of the upper connecting rod is fixed on the driving shaft, the other end of the upper connecting rod is hingedly connected with one end of the lower connecting rod, the other end of the lower connecting rod is hingedly connected with an inner side of the valve plate, when the driving shaft rotates under the drive of the motor, the upper connecting rod is driven to rotate, and then the lower connecting rod and the valve plate are driven to move. The rotating mechanism comprises a guide rod and an angle guide groove, one end of the guide rod is fixed on the inner wall of the valve body, the other end of the guide rod extends to the center of the valve body, and the guide rod is arranged in parallel with the driving shaft; the middle part of the angle guide groove is provided with at least one obtuse angle inflection point, one end of the angle guide groove is fixed on the inner side of the valve plate, and the other end of the angle guide groove extends to the free end of the guide rod, so that the free end of the guide rod can slide along the angle guide groove in the movement of the valve plate, when the free end of the guide rod slides to the inflection point of the angle guide groove, the valve plate is driven to rotate, and the opening and closing size adjustment of the valve plate is realized.

8. The anti-condensation, hermetic valve of claim 7, wherein, An inner side of the valve plate is fixed with a guide shaft in parallel with the driving shaft, the inner wall of the valve body is provided with two opposite guide grooves arranged along the axial direction of the valve body, the two ends of the guide shaft extend into the guide grooves, the end of the lower connecting rod hingedly connected with the valve plate is hingedly connected with the guide shaft, and the end of the angle guide groove fixedly connected with the valve plate is fixedly connected with the guide shaft, when the valve plate moves under the drive of the motor, the guide shaft limits the valve plate to slide along the guide groove, and the valve plate rotates around the guide shaft under the action of the rotating mechanism.

9. The anti-condensation, hermetic valve according to claim 8, characterized in that, The guide shaft, the driving shaft and the guide rod are not arranged on the same vertical plane.

10. The anti-condensation, hermetic valve of claim 9, wherein, The connecting rod mechanism composed of the upper and lower connecting rods comprises two groups, which are symmetrically arranged on the driving shaft, and the rotating mechanism comprises two groups, which are symmetrically arranged on both sides of the two groups of connecting rod mechanisms.

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