Vacuum pressure difference control device for upper cavity and lower cavity

Abstract

The utility model discloses an upper and lower cavity vacuum pressure difference control device, which comprises two box bodies which are arranged up and down and have the same structure, the opening ends of the two box bodies are opposite and are separated by a product film at the opening positions, the two box bodies are independently connected with vacuum pipeline control structures, one end of each vacuum pipeline control structure is connected with the corresponding box body, and the other end of each vacuum pipeline control structure is connected with the corresponding box body. The other end is connected with a vacuum pump; any box body is connected with a vacuum gauge assembly used for detecting the vacuum degree and a vacuum breaking assembly used for balancing the pressure difference between the interior and the exterior of the box body. According to the vacuum pressure difference control device, the pressure difference application field is further improved, and the problems that the vacuum pressure difference of the upper cavity and the lower cavity of the two box bodies is difficult to control and the control structure is complex are solved. The vacuum pressure difference control device is simple and easy to understand in principle, light and simple in structure, stable and rapid in control and easy and convenient to maintain.

Description

Technical Field

[0001] This utility model relates to the field of vacuum control technology, specifically to a vacuum pressure difference control device for upper and lower cavities. Background Technology

[0002] In fields involving sealed chambers, such as differential pressure forming, it is suitable for applications requiring pressure between the upper and lower films, high vacuum levels, or heat bonding, enabling differential pressure control between the upper and lower chambers and precise control of the vacuum level in these processes.

[0003] Traditional differential pressure forming structures and systems rarely require precise differential pressure control between the upper and lower chambers of the membrane material. Therefore, products formed or laminated with membrane material often do not have high requirements, and differential pressure control is often not used when there are more precise pressure requirements.

[0004] In view of this, it is necessary to develop a new type of vacuum differential pressure control device to solve the existing technical problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a vacuum differential pressure control device for the upper and lower chambers. The purpose of designing this vacuum differential pressure control device is to solve the problems of difficulty in controlling the vacuum differential pressure between the upper and lower chambers of the two boxes, as well as the complexity of the control structure.

[0006] To solve the above technical problems, the present invention is achieved through the following solution: The present invention provides a vacuum differential pressure control device for upper and lower cavities, comprising two boxes arranged vertically and having the same structure. The opening ends of the two boxes face each other and are separated at the opening by a product film. Each box is independently connected to a vacuum pipeline control structure, one end of which is connected to the box and the other end is connected to a vacuum pump.

[0007] Each chamber is connected to a vacuum gauge assembly for detecting vacuum level and a vacuum breaking assembly for balancing the pressure difference between the inside and outside of the chamber.

[0008] Furthermore, the vacuum pipeline control structure includes:

[0009] The vacuum switch flange, vacuum flow meter valve flange, and vacuum pump connection flange are connected in sequence.

[0010] A vacuum switch valve connected at the node between the vacuum flow meter valve flange and the vacuum pump connecting flange;

[0011] The vacuum flow meter is connected to the node between the vacuum flow meter valve flange and the vacuum pump connecting flange via a vacuum flow meter connecting pipe, and the vacuum switch valve is located between the vacuum flow meter connecting pipes at both ends of the vacuum flow meter.

[0012] Furthermore, the vacuum gauge assembly includes a vacuum gauge valve flange, a vacuum gauge valve, and a vacuum gauge connected in sequence, wherein the vacuum gauge valve flange is connected to the housing and communicates with the inner cavity of the housing.

[0013] Furthermore, the vacuum breaking component includes:

[0014] The first end of the vacuum valve flange is connected to the housing and communicates with the inner cavity of the housing.

[0015] The silencer is connected to the second end of the vacuum breaking valve flange via an adapter plate;

[0016] A vacuum breaking valve is connected to the node between the adapter plate and the vacuum breaking valve flange.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The vacuum differential pressure control device of this utility model further improves the application of differential pressure, and solves the problems of difficult control of vacuum differential pressure between the upper and lower cavities and complex control structure.

[0019] 2. The vacuum differential pressure control device of this utility model has a simple and easy-to-understand principle, a lightweight and simple structure, stable and fast control, and simple and convenient maintenance. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the vacuum differential pressure control device of this utility model.

[0021] Figure 2 This is a perspective view of the vacuum differential pressure control device of this utility model.

[0022] Figure 3 This is a structural diagram illustrating the specific design of the vacuum differential pressure control device of this utility model.

[0023] Figure 4 This is a schematic diagram illustrating the working principle of the vacuum differential pressure control device of this utility model.

[0024] The attached diagram is labeled as follows: 100 for housing, 200 for vacuum pipeline control structure, 1 for shell, 2 for vacuum switch flange, 3 for vacuum flow meter valve flange, 4 for vacuum gauge valve flange, 5 for vacuum breaker valve flange, 6 for vacuum flow meter connecting pipe, 7 for vacuum pump connecting flange, 8 for vacuum switch valve, 9 for vacuum flow meter, 10 for vacuum gauge valve, 11 for vacuum gauge, 12 for vacuum breaker valve, 13 for adapter plate, 14 for silencer, 20 for vacuum pump, and 21 for PLC controller. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the embodiments described in this utility model are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] Example 1: The specific structure of this utility model is as follows:

[0028] Please refer to the appendix. Figure 1-4 The present invention provides a vacuum pressure differential control device for upper and lower cavities, comprising two boxes 100 arranged vertically and having the same structure. The opening ends of the two boxes 100 face each other and are separated at the opening by a product film. Each box 100 is independently connected to a vacuum pipeline control structure 200, one end of which is connected to the box 100 and the other end is connected to a vacuum pump.

[0029] Each chamber 100 is connected to a vacuum gauge assembly for detecting vacuum level and a vacuum breaking assembly for balancing the pressure difference between the inside and outside of the chamber.

[0030] The vacuum pipeline control structure 200 includes:

[0031] The vacuum switch flange 2, the vacuum flow meter valve flange 3, and the vacuum pump connection flange 7 are connected in sequence.

[0032] A vacuum switch valve 8 is connected to the node between the vacuum flow meter valve flange 3 and the vacuum pump connecting flange 7;

[0033] The vacuum flow meter 9 is connected to the node between the vacuum flow meter valve flange 3 and the vacuum pump connecting flange 7 via the vacuum flow meter connecting pipe 6, and the vacuum switch valve 8 is located between the vacuum flow meter connecting pipes 6 at both ends of the vacuum flow meter 9.

[0034] The vacuum gauge assembly includes a vacuum gauge valve flange 4, a vacuum gauge valve 10, and a vacuum gauge 11 connected in sequence. The vacuum gauge valve flange 4 is connected to the housing 100 and communicates with the inner cavity of the housing 100.

[0035] The vacuum breaking component includes:

[0036] The first end of the vacuum valve flange 5 is connected to the housing 100 and communicates with the inner cavity of the housing 100.

[0037] The silencer 14 is connected to the second end of the vacuum breaking valve flange 5 via an adapter plate 13;

[0038] The vacuum breaking valve 12, which is connected to the node between the adapter plate 13 and the vacuum breaking valve flange 5, is used to prevent the vacuum gauge 11 from being damaged when the pressure inside the cavity is higher than the operating pressure due to special working conditions. The vacuum breaking valve 12 breaks the vacuum to balance the pressure inside and outside the cavity before the cavity needs to be opened after stopping the vacuuming.

[0039] Example 2:

[0040] like Figure 3 As shown, Figure 3 This is a schematic diagram illustrating the working principle of the vacuum differential pressure control device of this utility model. Figure 3 The vacuum pump 20 is connected to the vacuum pump connecting flange 7, and the PLC controller 21 is connected to the vacuum flow meter 9 and the vacuum gauge 11 respectively. The PLC controller 21 has a PID control system: combined with the vacuum degree of the vacuum gauge 11, the pressure and flow feedback values ​​of the vacuum flow meter 9, the PLC controller 21 adjusts the vacuum flow rate of the vacuum flow meter 9 to the cavity according to the set vacuum value, and balances the pumping force of the vacuum pump 20 to achieve the purpose of stabilizing the vacuum value inside the cavity.

[0041] When starting work: Vacuum switch valve 8 is open, vacuum gauge valve 10 is open, vacuum flow meter 9 is closed, vacuum breaking valve 12 is closed, and vacuum pump 20 is started. At this time, the vacuum in the cavity of the chamber 100 drops rapidly. After reaching the set value, vacuum switch valve 8 is triggered to close, and the valve on vacuum flow meter 9 is opened. PLC controller 21 combines the feedback value of vacuum gauge 11 and the feedback of inlet pressure and flow rate of vacuum flow meter 9 to perform PID regulation, so as to control the vacuum in the cavity of chamber 100 to stabilize at the set value.

[0042] After the work is completed: according to the different process requirements of the upper and lower cavities of the two boxes 100, the vacuum pump valve is closed, the vacuum flow meter 9 is closed, and the vacuum breaking valve 12 is opened in sequence to balance the pressure difference between the inside and outside of the cavity of the box 100.

[0043] In summary, the vacuum differential pressure control device of this invention further improves the application of differential pressure, solving the problems of difficult control of the vacuum differential pressure between the upper and lower cavities of two boxes, as well as the complexity of the control structure. The vacuum differential pressure control device of this invention has a simple and easy-to-understand principle, a lightweight and concise structure, stable and rapid control, and is simple and convenient to maintain.

[0044] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A vacuum pressure difference control device for upper and lower cavities, characterized in that, It includes two boxes (100) that are set up vertically and have the same structure. The opening ends of the two boxes (100) face each other and are separated by a product film at the opening. Each box (100) is independently connected to a vacuum pipeline control structure (200). One end of the vacuum pipeline control structure (200) is connected to the box (100) and the other end is connected to a vacuum pump. Each housing (100) is connected to a vacuum gauge assembly for detecting vacuum level and a vacuum breaking assembly for balancing the pressure difference between the inside and outside of the housing.

2. The vacuum pressure difference control device for upper and lower cavities according to claim 1, characterized in that, The vacuum pipeline control structure (200) includes: The vacuum switch flange (2), vacuum flow meter valve flange (3), and vacuum pump connection flange (7) are connected in sequence. A vacuum switch valve (8) is connected to the node between the vacuum flow meter valve flange (3) and the vacuum pump connecting flange (7); The vacuum flow meter (9) is connected to the node between the vacuum flow meter valve flange (3) and the vacuum pump connecting flange (7) via the vacuum flow meter connecting pipe (6), and the vacuum switch valve (8) is located between the vacuum flow meter connecting pipe (6) at both ends of the vacuum flow meter (9).

3. The vacuum pressure difference control device for upper and lower cavities according to claim 1, characterized in that, The vacuum gauge assembly includes a vacuum gauge valve flange (4), a vacuum gauge valve (10), and a vacuum gauge (11) connected in sequence. The vacuum gauge valve flange (4) is connected to the housing (100) and communicates with the inner cavity of the housing (100).

4. The vacuum pressure difference control device for upper and lower cavities according to claim 1, characterized in that, The vacuum breaking component includes: The first end of the vacuum valve flange (5) is connected to the housing (100) and communicates with the inner cavity of the housing (100); The silencer (14) is connected to the second end of the vacuum breaking valve flange (5) via an adapter plate (13); A vacuum breaking valve (12) is connected at the node between the adapter plate (13) and the vacuum breaking valve flange (5).

Images