Cavity vacuum degree detection tool

Abstract

The utility model belongs to vacuum detection technical field discloses a cavity vacuum degree detection frock, including frock body, frock body has detection chamber and with the communication hole of cavity to be measured, the top of frock body has the indicating box of sealed setting, and the bottom of indicating box stretches into detection chamber, detection unit, detection unit includes flexible sealing diaphragm, the top of flexible sealing diaphragm is bonded and is installed with the top rod, and the top of top rod is installed with the guide cylinder of cover, and the guide cylinder is fixedly installed in the bottom of indicating box, and flexible sealing diaphragm, top rod and indicating box form vacuum degree indicating structure, standard KF vacuum interface, standard KF vacuum interface is linked together with detection chamber, and standard KF vacuum interface is installed in the bottom of frock body. The utility model is through the flexible sealing diaphragm of no electronic component and physical indication design to solve the problem of easy damage of electronic vacuum gauge in the environment of dust, vibration, electromagnetic interference, can reduce equipment cost simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of vacuum detection technology, and in particular to a tooling for detecting the vacuum level of a cavity. Background Technology

[0002] A cavity vacuum level testing fixture is a specially designed device or system used to measure and verify the vacuum level inside a sealed cavity (such as a vacuum container, sealing equipment, industrial pipeline, etc.). In industrial production and scientific research experiments, many processes need to be carried out in a vacuum environment, and the vacuum level of the cavity is a key parameter affecting product quality and the success or failure of the process.

[0003] Currently, vacuum level detection mainly relies on electronic vacuum gauges (such as Pirani gauges and ionization gauges). Although these devices are highly accurate, they have the following problems: First, electronic vacuum gauges are expensive and have a delicate structure, making them prone to damage or measurement inaccuracies in harsh industrial environments (such as dust, electromagnetic interference, and vibration); second, they require power supply and signal reading systems, making them relatively complex to operate and unsuitable for scenarios that require rapid and frequent rough judgments. Therefore, we propose a cavity vacuum level detection fixture. Utility Model Content

[0004] To address the technical problems raised in the background section, this utility model provides the following technical solution:

[0005] A cavity vacuum degree detection fixture includes a fixture body, the fixture body having a detection chamber and a communication hole communicating with the cavity to be tested, the top of the fixture body having a sealed indicator box, and the bottom of the indicator box extending into the detection chamber;

[0006] The detection unit includes a flexible sealing diaphragm installed in the detection chamber. A top rod is bonded to the top of the flexible sealing diaphragm, and a guide cylinder is sleeved on the top of the top rod. The guide cylinder is fixedly installed at the bottom of the indicator box. The flexible sealing diaphragm, the top rod, and the indicator box form a vacuum degree indication structure.

[0007] A standard KF vacuum interface is provided, which is connected to the detection chamber and installed at the bottom of the tooling body. The standard KF vacuum interface is connected to the vacuum interface of the chamber to be tested through a sealing ring and an external quick clamp structure.

[0008] As a technical solution of the cavity vacuum degree detection fixture of this utility model, the indicator box integrates an indicator light and a detachable rechargeable lithium battery, the top of the top rod is equipped with a metal protrusion, and the metal protrusion, the indicator light and the rechargeable lithium battery form an open circuit through wires.

[0009] As a technical solution of the cavity vacuum degree detection tool of this utility model, the flexible sealing diaphragm divides the detection chamber into an upper chamber and a lower chamber, the push rod is located in the upper chamber, and the connecting hole is connected to the lower chamber.

[0010] As a technical solution of the cavity vacuum degree detection tool of this utility model, the cross-section of the connecting hole and the standard KF vacuum interface are concentric circles.

[0011] As a technical solution of the cavity vacuum degree detection tool of this utility model, the flexible sealing diaphragm is a rubber diaphragm.

[0012] As a technical solution of the cavity vacuum degree detection fixture of this utility model, a handle for hand use is installed on one side of the fixture body.

[0013] As a technical solution of the cavity vacuum degree detection tool of the present invention, the upper chamber is connected to the atmosphere through an extension tube, and a pressure relief valve is installed on the extension tube. The pressure relief valve is a preset pressure valve with adjustable opening pressure.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] 1. This utility model solves the problem of electronic vacuum gauges being easily damaged in dusty, vibrating, and electromagnetic interference environments by using a flexible sealing diaphragm without electronic components and a physical indication design, while also reducing equipment costs.

[0016] 2. This utility model enables rapid installation through a standard KF vacuum interface, and combines it with an indicator light for real-time feedback and a pressure relief valve protection mechanism to meet the frequent and rapid vacuum degree rough inspection needs in industrial scenarios, while reducing downtime and operational complexity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0020] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0021] Explanation of reference numerals in the attached figures:

[0022] In the diagram: 1. Tooling body; 101. Connecting hole; 102. Indicator box; 1021. Indicator light; 1022. Rechargeable lithium battery; 103. Handle; 201. Flexible sealing diaphragm; 202. Push rod; 2021. Metal protrusion; 203. Guide tube; 3. Upper chamber; 4. Lower chamber; 5. Extension tube; 6. Pressure relief valve; 7. Standard KF vacuum interface; 8. Sealing ring. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Reference Figures 1-3 A cavity vacuum degree detection fixture is provided. The cavity vacuum degree detection fixture includes a fixture body 1, which is made of aluminum alloy. The fixture body 1 has a detection chamber and a communication hole 101 communicating with the cavity to be tested. The top of the fixture body 1 has a sealed indicator box 102, which is made of transparent acrylic material, and the bottom of the indicator box 102 extends into the detection chamber.

[0025] The detection unit includes a flexible sealing diaphragm 201 installed in the detection chamber. A top rod 202 is bonded to the top of the flexible sealing diaphragm 201. A guide cylinder 203 is sleeved on the top of the top rod 202. The guide cylinder 203 is fixedly installed at the bottom of the indicator box 102. The flexible sealing diaphragm 201, the top rod 202 and the indicator box 102 form a vacuum degree indication structure.

[0026] The standard KF vacuum interface 7 (such as the standard KF25 vacuum interface) is connected to the detection chamber and is installed at the bottom of the fixture body 1. The standard KF vacuum interface 7 is connected to the vacuum interface of the chamber to be tested through the sealing ring 8 and the external quick clamp structure. In application, the fixture body 1 and the standard KF vacuum interface 7 cooperate to achieve a quick sealing connection, which can meet the needs of rapid detection in industrial sites. At the same time, the vacuum degree indication structure directly reflects the pressure difference without the need for electronic signal conversion, and the structure is simple and reliable.

[0027] Reference Figures 1-3The indicator box 102 integrates an indicator light 1021 (such as a 5V LED indicator) and a removable rechargeable lithium battery 1022 (such as an 18650 rechargeable lithium battery). A metal protrusion 2021 is installed on the top of the push rod 202. The metal protrusion 2021, the indicator light 1021, and the rechargeable lithium battery 1022 form an open circuit through wires. When the vacuum level is up to standard, the flexible sealing diaphragm 201 deforms and pushes the push rod 202 upward. The metal protrusion 2021 contacts the electrode plate inside the indicator box 102, closing the circuit and illuminating the indicator light 1021 (the open circuit design consumes power close to zero). In application, the integrated indicator light 1021 and the rechargeable lithium battery 1022 form an open circuit. The metal protrusion 2021 and the push rod 202 are linked to trigger the indicator light 1021, providing intuitive feedback on the vacuum level (such as on / off). This eliminates the need for complex display devices, reduces energy consumption, and facilitates maintenance.

[0028] Reference Figure 1 and Figure 2 The flexible sealing diaphragm 201 divides the detection chamber into an upper chamber 3 and a lower chamber 4. The push rod 202 is located in the upper chamber 3, and the connecting hole 101 is connected to the lower chamber 4. In application, the design of the flexible diaphragm 201 separating the upper chamber 3 and the lower chamber 4 allows the lower chamber 4 to be directly connected to the chamber to be tested. Pressure changes drive the push rod 202 through the deformation of the flexible sealing diaphragm 201, improving detection sensitivity. At the same time, the upper chamber 3 is kept in contrast to atmospheric pressure or a preset pressure, simplifying the detection logic.

[0029] Reference Figure 1 and Figure 2 The cross-sections of the connecting hole 101 and the standard KF vacuum interface 7 are concentric circles. In application, the concentric circle hole design can ensure that the sealing ring 8 is subjected to uniform force and reduce the risk of leakage.

[0030] Reference Figure 1 and Figure 2 The flexible sealing diaphragm 201 is a rubber diaphragm. In application, the flexible sealing diaphragm 201 adopts a rubber diaphragm design, which is not only low in cost, but also resistant to vibration and dusty environments.

[0031] Reference Figure 1 and Figure 2 The tool body 1 has a handle 103 for hand use installed on one side. The handle 103 can be fitted with a non-slip rubber cover. In application, the handle 103 is designed to improve the convenience of hand operation and is suitable for narrow spaces.

[0032] Reference Figure 1 and Figure 2The upper chamber 3 is connected to the atmosphere through the extension pipe 5, and a pressure relief valve 6 is installed on the extension pipe 5. The pressure relief valve 6 is a preset pressure valve with adjustable opening pressure (pressure range: -100kPa to 0kPa). In application, the cooperation between the extension pipe 5 and the adjustable pressure relief valve 6 can achieve pressure balance by connecting to the atmosphere, and can also set a safety threshold to prevent overpressure from damaging the flexible sealing diaphragm 201, thereby enhancing the safety and adaptability of the equipment.

[0033] The working principle of this utility model is as follows: Pre-inspection preparation stage: check the pressure setting value of the pressure relief valve 6 (usually set to -80kPa), and confirm that the rechargeable lithium battery 1022 has sufficient power. Then clean the standard KF vacuum interface 7, sealing ring 8 and the interface surface of the cavity to be tested.

[0034] Tooling connection stage: First, align the standard KF vacuum interface 7 of the tooling with the interface of the cavity to be tested, and lock it with the external quick clamp structure to ensure a leak-free seal;

[0035] Vacuum testing stage: First, start the vacuum system and observe the deformation of the flexible sealing diaphragm 201. At this time, the push rod 202 moves upward so that the metal protrusion 2021 contacts the electrode and the indicator light 1021 lights up, indicating that the vacuum level meets the standard (e.g., ≤-70kPa). If the indicator light 1021 does not light up, it indicates that the vacuum level is insufficient and leakage or system failure needs to be checked.

[0036] Disassembly and maintenance: First, shut off the vacuum system. Slowly rotate the pressure relief valve 6 to balance the pressure and then remove the external quick clamp structure. Then, regularly check whether the flexible sealing diaphragm 201 is aging (it is recommended to replace it every 1000 times). Charge the rechargeable lithium battery 1022 every 3 months.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cavity vacuum degree detection fixture, characterized in that: include: The tooling body (1) has a detection chamber and a communication hole (101) communicating with the chamber to be tested. The top of the tooling body (1) has a sealed indicator box (102), and the bottom of the indicator box (102) extends into the detection chamber. The detection unit includes a flexible sealing diaphragm (201) installed in the detection chamber. A top rod (202) is bonded to the top of the flexible sealing diaphragm (201). A guide cylinder (203) is sleeved on the top of the top rod (202). The guide cylinder (203) is fixedly installed at the bottom of the indicator box (102). The flexible sealing diaphragm (201), the top rod (202), and the indicator box (102) form a vacuum degree indication structure. A standard KF vacuum interface (7) is connected to the detection chamber and is installed at the bottom of the tooling body (1). The standard KF vacuum interface (7) is connected to the vacuum interface of the chamber to be tested through a sealing ring (8) and an external quick clamp structure.

2. The cavity vacuum degree detection fixture according to claim 1, characterized in that: The indicator box (102) integrates an indicator light (1021) and a removable rechargeable lithium battery (1022). A metal protrusion (2021) is installed on the top of the top rod (202). The metal protrusion (2021), the indicator light (1021), and the rechargeable lithium battery (1022) form an open circuit through wires.

3. The cavity vacuum degree detection fixture according to claim 1, characterized in that: The flexible sealing diaphragm (201) divides the detection chamber into an upper chamber (3) and a lower chamber (4). The push rod (202) is located in the upper chamber (3), and the connecting hole (101) is connected to the lower chamber (4).

4. The cavity vacuum degree detection fixture according to claim 1, characterized in that: The cross-sections of the connecting hole (101) and the standard KF vacuum interface (7) are concentric circles.

5. The cavity vacuum degree detection fixture according to claim 1, characterized in that: The flexible sealing diaphragm (201) is a rubber diaphragm.

6. The cavity vacuum degree detection fixture according to claim 1, characterized in that: A handle (103) for hand use is installed on one side of the tool body (1).

7. The cavity vacuum degree detection fixture according to claim 3, characterized in that: The upper chamber (3) is connected to the atmosphere through an extension pipe (5), and a pressure relief valve (6) is installed on the extension pipe (5). The pressure relief valve (6) is a preset pressure valve with adjustable opening pressure.

Images