Positive pressure exhibition cabinet opening device

Abstract

The utility model provides a positive pressure exhibition cabinet opening device, and belongs to the field of exhibition appliance manufacturing. The cabinet comprises a cabinet body, a rotating shaft and a cabinet door, the cabinet door is installed on the cabinet body through a rotating shaft. The rotating shaft is fixedly mounted on the cabinet body, and a pull rope is arranged on the rotating shaft; a closed air cylinder is arranged in the cabinet door, and a piston capable of sliding in the air cylinder is arranged in the air cylinder; a communicating pipe is arranged in the piston; a one-way valve is arranged on the cabinet door and is provided with an air inlet and an air outlet; the exhaust port is connected with the outer side of the cabinet door, and the air inlet is connected with the external end; the side, facing the inner connecting end, of the piston is connected with the rotating shaft through a pull rope. According to the utility model, the pressure inside and outside the cabinet door can be balanced through the one-way valve; meanwhile, in the opening process that the cabinet door rotates around the rotating shaft, the pull rope pulls the piston to slide towards the inner connecting end; negative pressure is generated at the external end of the air cylinder, air enters slowly through the one-way valve, and therefore the piston moves slowly, and the buffering and damping effect on opening of the cabinet door is achieved.

Description

Technical Field

[0001] This utility model relates to the manufacturing technology of display case opening mechanism, and in particular to a positive pressure display case opening device, belonging to the field of exhibition equipment manufacturing technology. Background Technology

[0002] Display cases are frequently used equipment in museums and other exhibitions. Because display cases not only need to highlight the characteristics of the exhibits, they also need to be used for a long time and maintain their own sturdiness and stability.

[0003] To ensure the long-term preservation of cultural relics, delicate exhibits, or valuable items, display cases are sealed and kept at constant temperature and humidity. Furthermore, to further prevent dust ingress and enhance the level of protection, positive pressure display cases are generally used.

[0004] The opening of positive pressure display cases in the prior art has the following problems: First, the pressure needs to be reduced before the positive pressure display case is opened in order to avoid the danger caused by the sudden opening of the cabinet door due to excessive internal pressure; second, because positive pressure is used, the cabinet door of the display case is generally thick and heavy, and if too much force is used during the opening process, it is easy to damage the hinge structure of the cabinet door, thereby causing a decrease in airtightness.

[0005] Therefore, there is an urgent need in the existing technology for an opening device that can safely and quickly open the cabinet door of a positive pressure cabinet, is easy to maintain, and is not prone to damage to the sealed display case. Utility Model Content

[0006] This utility model provides a new positive pressure display case opening device. By installing a cylinder, piston, and one-way valve inside the case door, the air pressure during the opening of the positive pressure case can be adjusted by the three components to avoid the case door opening too quickly, thus solving the technical problems of easy damage and inconvenience of the opening process of the positive pressure case door in the prior art.

[0007] The positive pressure display cabinet opening device of this utility model includes: a cabinet body, a pivot, and a cabinet door; the cabinet body is a sealed cavity with an opening on the top surface; the cabinet door is installed on the cabinet body via the pivot and can rotate relative to the pivot to open or close the opening; the pivot is fixedly installed on the cabinet body, and a pull rope is provided on the pivot;

[0008] The cabinet door contains a sealed cylinder, and inside the cylinder is a piston that can slide within the cylinder. A connecting pipe is provided inside the piston, with its two ends corresponding to the two ends of the cylinder. The two ends of the cylinder are an inner connection and an outer connection, respectively. A one-way valve is provided on the cabinet door, having an inlet and an outlet. The outlet is located on the outside of the cabinet door and connected to the outer connection.

[0009] The piston is connected to the rotating shaft via the pull rope on the side facing the inner end;

[0010] The one-way valve is also provided with a lever that can open the one-way valve. The lever is located outside the cabinet door. The lever is pressed down so that the air inlet is connected to the exhaust port through the one-way valve.

[0011] The cabinet door rotates around the pivot, causing the pull rope to pull the piston towards the inner end.

[0012] As described above, in the positive pressure display case opening device, a fixing component is provided on the rotating shaft; and a guide wheel is provided on the inner end.

[0013] One end of the pull rope is mounted on the rotating shaft via the fixing member, and the other end is connected to the piston via the guide wheel.

[0014] As described above, in the positive pressure display case opening device, a buffer pad is provided inside the cylinder, and the buffer pad is located at the inner end; a permanent magnet is also provided on the inner end; a magnet is provided inside the piston; the piston contacts the permanent magnet through the buffer pad, and the magnet and the permanent magnet repel each other.

[0015] In the positive pressure display case opening device described above, both the permanent magnet and the buffer pad are provided with through holes, and the pull rope is connected to the piston through the through holes.

[0016] As described above, in the positive pressure display case opening device, an air pressure pipe is provided on the external end, and the external end is connected to the air inlet of the one-way valve through the air pressure pipe.

[0017] As described above, the positive pressure display case opening device includes a one-way valve comprising a valve body, a ball valve core, and a spring; the top of the valve body is conical, and the exhaust port is located at the top of the cone; one end of the spring is fixed to the bottom of the valve body, and the other end presses the ball valve core against the exhaust port.

[0018] As described above, in the positive pressure display case opening device, the bottom of the pressure rod is connected to the spherical valve core, and the top of the pressure rod is provided with a pressing key; a limit sleeve is provided on the outside of the cabinet door, and the pressure rod is sleeved in the limit sleeve.

[0019] As described above, in the positive pressure display case opening device, the pull rope is located inside the cabinet body, and the inner connection end is located inside the cabinet door.

[0020] As described above, in the positive pressure display case opening device, the cabinet body is provided with a lock, and the cabinet body presses the cabinet door tightly onto the opening through the lock.

[0021] In the positive pressure display case opening device described above, the connecting pipe is a capillary tube with a diameter of 0.12-0.24 mm.

[0022] In this invention, before opening the cabinet door, the pressure inside and outside the cabinet door can be balanced simply by using a one-way valve; at the same time, during the opening process of the cabinet door rotating around the pivot, the pull rope pulls the piston to slide inward; the negative pressure generated at the outer end of the cylinder is slowly introduced through the one-way valve, thereby causing the piston to move slowly, which plays a role in buffering and shock absorption when the cabinet door is opened. Attached Figure Description

[0023] Figure 1 This is a side sectional view of the positive pressure display case opening device in the closed state according to an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 Using a schematic diagram of the side profile structure;

[0025] Figure 3 for Figure 1 A partially enlarged schematic diagram of a one-way valve. Detailed Implementation

[0026] The positive pressure display cabinet opening device described in this utility model can be made of the following materials, but is not limited to: cylinder, piston, one-way valve, stainless steel positive pressure cabinet, pneumatic cylinder, steel wire rope, plastic, rubber, structural steel, etc.

[0027] like Figure 1 The diagram shown is a side sectional view of the positive pressure display case opening device in its closed state according to an embodiment of this utility model, and refers to... Figure 2 and Figure 3 This utility model is mainly used in positive pressure cabinets or other sealed boxes with positive pressure effect.

[0028] The positive pressure display cabinet opening device of this utility model embodiment includes: a cabinet body 1, a rotating shaft 10, and a cabinet door 2; the cabinet body 1 is a sealed cavity with an opening on the top surface; the cabinet door 2 is installed on the cabinet body 1 through the rotating shaft 10 and can rotate relative to the rotating shaft 10 to open or close the opening; the cabinet body 1 is a positive pressure cabinet body, and after the opening is closed, it is pressurized by an air pressure control device, thereby realizing that the air pressure inside the cabinet is positive relative to the outside of the cabinet body.

[0029] The rotating shaft 10 is fixedly installed on the cabinet 1, and a pull rope 5 is provided on the rotating shaft 10; the pull rope 5 is generally a steel wire rope or a chain.

[0030] A sealed cylinder 3 is installed inside the cabinet door 2, and a piston 4 that can slide inside the cylinder 3 is installed inside the cylinder 3; a connecting pipe 40 is opened inside the piston 4, and the two ends of the connecting pipe 40 correspond to the two ends of the cylinder 3 respectively; the two ends of the cylinder 3 are an inner end and an outer end respectively; the inner end is connected to the space inside the cabinet 1, and the outer end is connected to the outside.

[0031] A one-way valve 6 is provided on the cabinet door 1. The one-way valve 6 has an air inlet 62 and an exhaust port 61. The exhaust port 61 is located on the outside of the cabinet door 1 and is connected to the outside of the cabinet door 1. The air inlet 62 is connected to the external end of the one-way valve 6. That is, the air inlet 62 is connected to the inside of the cabinet body 1 through the cylinder 3. Specifically, a pneumatic pipe 41 is provided on the external end, and the external end is connected to the air inlet 62 of the one-way valve 6 through the pneumatic pipe 41.

[0032] The piston 4 is connected to the rotating shaft 10 via the pull rope 5 on the side facing the inner end; during the opening of the cabinet door 2, the cylinder 3 of the cabinet door 2 moves away from the rotating shaft 10, thereby tightening the pull rope 5 and causing the piston 4 to slide down.

[0033] The one-way valve 6 is also provided with a pressure rod 8 that can open the one-way valve 6. The pressure rod 8 is located outside the cabinet door 2. The pressure rod 8 is pressed down so that the air inlet 62 is connected to the exhaust port 61 through the one-way valve 6. When the pressure rod 8 is pressed down, the air in the cabinet 1 can be discharged under the closed positive pressure state of the cabinet 2, thereby realizing the pressure balance of the cabinet 1 before it is opened.

[0034] The cabinet door 2 rotates around the pivot 10 so that the pull rope 5 pulls the piston 4 to slide towards the inner end.

[0035] It should be noted that in order to ensure the slow movement of the piston and thus provide a damping effect for the opening of the cabinet door, the diameter of the connecting pipe must be very small; otherwise, the piston will not be able to play a role in shock absorption and buffering. Therefore, in this embodiment, the connecting pipe 40 is a capillary tube with a diameter of 0.12-0.24 mm.

[0036] In this invention, before opening the cabinet door, simply open the one-way valve with the pressure rod, and the positive pressure gas inside the cabinet can be discharged through the gas 3, connecting pipe 40, air inlet 62 and one-way valve 6, thus achieving a balance of pressure inside and outside the cabinet door; at this time, the cabinet door 2 can be opened, avoiding excessive air pressure inside the cabinet 1 and damage to the cabinet door 2 during the opening process.

[0037] Even if cabinet door 2 is suddenly opened, the high-pressure gas cannot quickly push cabinet door 2 open because the diameter of the connecting pipe 40 on piston 4 inside cylinder 3 is very small, thus preventing cabinet door 2 from opening rapidly and damaging the rotating shaft.

[0038] At the same time, during the opening process of the cabinet door 2 rotating around the pivot 10, the pull rope pulls the piston 4 to slide inward; the negative pressure generated at the outer end of the cylinder 4 slowly introduces air through the one-way valve 6, thereby causing the piston to move slowly, and the entire cabinet door cannot be opened quickly, which plays a role in buffering and shock absorption when the cabinet door 2 is opened.

[0039] Generally, a fixing member 15 is provided on the rotating shaft 10; a guide wheel 25 is provided on the inner end; the guide wheel 25 plays a guiding role and can also prevent the pull rope 5 from being worn excessively.

[0040] One end of the pull rope 5 is mounted on the rotating shaft 10 via the fixing member 15, and the other end is connected to the piston 4 via the guide wheel 25.

[0041] Furthermore, a buffer pad 31 is provided inside the cylinder 3, and the buffer pad 31 is located at the inner end; a permanent magnet 30 is also provided on the inner end; a magnet is provided inside the piston 4; the piston 4 is in contact with the permanent magnet 30 through the buffer pad 31, and the magnet and the permanent magnet 30 repel each other.

[0042] During the actual opening process, when the cabinet door is opened to the maximum angle, the piston 4 rests against the buffer pad 31. At this time, the magnet inside the piston and the permanent magnet 30 repel each other, which further ensures that the piston 4 will not excessively squeeze the buffer pad 31. Due to the mutual repulsion of the magnetic force when the door is opened to the maximum angle, the opener can clearly feel that the door has been opened to the maximum angle, thus avoiding damage to the rotating shaft.

[0043] Normally, to prevent the pull rope 5 from getting stuck, both the permanent magnet 30 and the buffer pad 31 are provided with through holes, through which the pull rope 5 is connected to the piston 4.

[0044] like Figure 3 The positive pressure display case opening device of this embodiment includes a one-way valve 6 comprising a valve body 60, a ball valve core 7, and a spring 70. The top of the valve body 60 is conical, and the exhaust port 61 is located at the top of the cone. One end of the spring 70 is fixed to the bottom inside the valve body 60, and the other end presses the ball valve core 7 against the exhaust port 61.

[0045] Specifically, a gasket 71 is provided at the bottom of the valve body 60; the gasket 71 has a throttling orifice 72; the bottom of the spring 70 is fixed to the bottom of the valve body 60 by the gasket 71. The throttling orifice 72 corresponds to the air inlet 62.

[0046] During the cabinet door opening process, if it is opened quickly, the air at the inner end of cylinder 4 does not have enough time to enter the outer end through the connecting pipe 40; the negative pressure in the outer end needs to overcome the pressure of spring 70 on ball valve core 7 in order for air to enter cylinder 4 through exhaust port 61. This greatly increases the safety of opening the cabinet door.

[0047] Preferably, the bottom of the pressure rod 8 is connected to the spherical valve core 7, and the top of the pressure rod 8 is provided with a hemispherical pressing key; a limiting sleeve 80 is provided on the outside of the cabinet door 2, and the pressure rod 6 is sleeved in the limiting sleeve 80.

[0048] In this embodiment, the positive pressure display case opening device has a lock on the cabinet body 1, which presses the cabinet door 2 onto the opening.

[0049] Normally, the pull rope 5 is located inside the cabinet 1, and the inner end is located inside the cabinet door 2.

[0050] In addition, the positive pressure display cabinet opening device of this utility model has low manufacturing cost, compact structure, ingenious construction, stable finished product quality, and convenient use and maintenance. It is suitable for various positive pressure cabinets with silent and shock-absorbing opening functions.

[0051] The sequence numbers of the above-described embodiments of this utility model are merely for descriptive purposes and do not represent the superiority or inferiority of the embodiments. Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of some modifications and the superposition of necessary general technologies; of course, they can also be implemented by simplifying some important technical features. Based on this understanding, the essential part of the technical solution of this utility model, or the part that contributes to the prior art, is: the overall function and structure, and the structure described in the various embodiments of this utility model.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A positive pressure display case opening device, characterized in that, include: The cabinet consists of a cabinet body, a hinge, and a cabinet door. The cabinet body is a sealed cavity with an opening on the top surface. The cabinet door is mounted on the cabinet body via the hinge and can rotate relative to the hinge to open or close the opening. The hinge is fixedly mounted on the cabinet body and is equipped with a pull rope. The cabinet door is equipped with a sealed cylinder, and the cylinder contains a piston that can slide within the cylinder. A connecting pipe is provided inside the piston, with its two ends corresponding to the two ends of the cylinder. The two ends of the cylinder are an inner connection end and an outer connection end, respectively. A one-way valve is provided on the cabinet door, which has an air inlet and an air outlet. The air outlet is located on the outside of the cabinet door and connected to it, while the air inlet is connected to the outer connection end. The side of the piston facing the inner end is connected to the rotating shaft via the pull rope; The one-way valve is also provided with a lever that can open the one-way valve. The lever is located outside the cabinet door. The lever is pressed down so that the air inlet is connected to the exhaust port through the one-way valve. The cabinet door rotates around the pivot, causing the pull rope to pull the piston towards the inner end; A fixing component is provided on the rotating shaft; a guide wheel is provided on the inner end; one end of the pull rope is installed on the rotating shaft through the fixing component, and the other end is connected to the piston through the guide wheel.

2. The positive pressure display case opening device according to claim 1, characterized in that, A buffer pad is provided inside the cylinder, and the buffer pad is located at the inner end; a permanent magnet is also provided on the inner end; a magnet is provided inside the piston; the piston is in contact with the permanent magnet through the buffer pad, and the magnet and the permanent magnet repel each other.

3. The positive pressure display case opening device according to claim 2, characterized in that, Both the permanent magnet and the buffer pad are provided with through holes, and the pull rope is connected to the piston through the through holes.

4. The positive pressure display case opening device according to claim 1, characterized in that, An air pressure pipe is provided on the external terminal, and the external terminal is connected to the air inlet of the one-way valve through the air pressure pipe.

5. The positive pressure display case opening device according to claim 4, characterized in that, The one-way valve includes: a valve body, a ball valve core, and a spring; the top of the valve body is conical, and the exhaust port is located at the top of the cone; one end of the spring is fixed to the bottom of the valve body, and the other end presses the ball valve core onto the exhaust port.

6. The positive pressure display case opening device according to claim 5, characterized in that, The bottom of the pressure rod is connected to the spherical valve core, and a pressing key is provided at the top of the pressure rod; a limit sleeve is provided on the outside of the cabinet door, and the pressure rod is sleeved in the limit sleeve.

7. The positive pressure display case opening device according to any one of claims 1-6, characterized in that, The pull cord is located inside the cabinet, and the inner end is located inside the cabinet door.

8. The positive pressure display case opening device according to any one of claims 1-6, characterized in that, The cabinet is equipped with a lock, which presses the cabinet door against the opening.

9. The positive pressure display case opening device according to any one of claims 1-6, characterized in that, The connecting tube is a capillary tube with a diameter of 0.12-0.24 mm.

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