Sealing performance pressure maintaining and vacuum detecting equipment

Abstract

The utility model discloses a sealing pressure maintaining and vacuum detecting device, which comprises a lathe bed and a detecting mechanism, the detecting mechanism comprises a lower vacuum box and an upper vacuum box device which are arranged on the lathe bed, the lower vacuum box is provided with a placing die for placing a detected product, the placing die is provided with a pressure maintaining inflation hole, and the upper vacuum box is provided with a pressure maintaining inflation hole. An air injection hole and a vacuumizing hole are formed in the lower vacuum box, the air injection hole is communicated with the pressure maintaining inflation hole through an air pipe, the air injection hole is connected with an external air source and a detector, and the vacuumizing hole is connected with an external vacuum pump. The device provided by the utility model can save the detection time, greatly improves the detection efficiency, facilitates the detection of whether a workpiece with slight air leakage is qualified or not, prevents the workpiece from flowing into the market, and is more favorable for meeting the production requirements.

Description

Technical Field

[0001] This utility model relates to the field of vacuum testing equipment technology, and in particular to a sealing pressure-holding vacuum testing device. Background Technology

[0002] Pipe fittings (cast parts, elbows, tees, straight fittings, valves, and other fluid connections) are commonly used in pipelines transporting media such as water, oil, air, natural gas, and steam. Therefore, the sealing performance of these materials is crucial. Pipe fittings require sealing performance testing (e.g., checking for sand holes or cracks) to determine their suitability for normal use. Currently, there is no testing equipment capable of simultaneously performing pressure holding and vacuum testing. Therefore, corresponding improvements are needed to address this issue. Utility Model Content

[0003] (a) Technical problems that need to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a sealing pressure holding and vacuum testing device. This device can save testing time and greatly improve testing efficiency. It is also beneficial for detecting whether products with slight (slow) air leakage are qualified, preventing unqualified or defective workpieces from entering the market and making it more conducive to meeting production requirements.

[0005] (ii) Technical solutions to be adopted

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A sealed pressure-holding and vacuum testing device includes a bed and a testing mechanism. The testing mechanism includes a lower vacuum box and an upper vacuum box assembly disposed on the bed. The lower vacuum box is provided with a placement mold for placing the product to be tested. The placement mold is provided with a pressure-holding and inflation port. The lower vacuum box is provided with an air injection port and a vacuum extraction port. The air injection port and the pressure-holding and inflation port are connected through an air pipe. The air injection port is connected to an external air source and a detector. The vacuum extraction port is connected to an external vacuum pump.

[0008] Preferably, the upper vacuum box device includes an applied power source disposed on the bed and an upper vacuum cover disposed on the applied power source. The upper vacuum cover corresponds exactly to the lower vacuum box. The opening and closing of the applied power source causes the upper vacuum cover to cover the lower vacuum box, forming a sealed chamber, to open and close.

[0009] Preferably, the power source is a pneumatic cylinder or a hydraulic cylinder.

[0010] Preferably, a sealing ring is provided on the upper surface of the lower vacuum box.

[0011] Preferably, a boss is provided on the upper surface of the lower vacuum box, and an upper tooth is provided on the boss; a lower tooth is provided on the lower surface of the placement mold, and the lower tooth and the upper tooth cooperate with each other.

[0012] Preferably, the placement mold is provided with a sealing gasket.

[0013] Preferably, the placement mold uses symmetrically distributed tooling seats, each tooling seat is locked to the protrusion of the lower vacuum box by a fixing member, and the upper surface of each tooling seat is inclined at 45 degrees, and the sealing gasket is installed on the inclined surface.

[0014] Preferably, the fastener is a screw or bolt.

[0015] Preferably, the air source is an air pump, and the detector is a pressure gauge.

[0016] (III) The technical effects to be achieved

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

[0018] Firstly, this utility model includes a testing mechanism comprising a lower vacuum box and an upper vacuum box device mounted on the bed. The lower vacuum box is provided with a placement mold for placing the product to be tested, and the placement mold is provided with a pressure-holding and inflation hole. The lower vacuum box is provided with an air injection hole and a vacuum extraction hole. The air injection hole and the pressure-holding and inflation hole are connected by an air pipe. The air injection hole is connected to an external air source and a detector, while the vacuum extraction hole is connected to an external vacuum pump. This structure only requires the cooperation of the bed, the upper vacuum box device, the lower vacuum box, and the external air source, detector, and vacuum pump. The structure is also relatively reasonable, greatly reducing the difficulty of manufacturing.

[0019] Secondly, this utility model has an external vacuum pump connected to the vacuum hole and an external gas source and detector connected to the air injection hole. This not only enables vacuuming while maintaining pressure, greatly saving testing time and further improving testing efficiency, but also accurately detects whether the tested product has slight (slow) air leakage due to sand holes or cracks, preventing unqualified products from entering the market, increasing the qualified product rate, and making it more conducive to meeting production requirements. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the lower vacuum box structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the upper vacuum cover structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure on which the product to be tested is placed on the placement mold of this utility model.

[0024] In the diagram: 1, bed; 2, testing mechanism; 3, product being tested; 21, lower vacuum box; 22, upper vacuum box device; 23, placement mold; 24, sealing gasket; 211, air injection port; 212, vacuum extraction port; 213, sealing ring; 214, boss; 221, power source; 222, upper vacuum cover; 231, pressure holding and air filling port. Detailed Implementation

[0025] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0026] In the description of this utility model, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0029] Example 1: See Figure 1 , Figure 2 , Figure 3 and Figure 4 A sealed pressure-holding and vacuum testing device includes a bed 1 and a testing mechanism 2. The testing mechanism 2 includes a lower vacuum box 21 and an upper vacuum box device 22 mounted on the bed 1. The lower vacuum box 21 is provided with a placement mold 23 for placing the product to be tested 3. The placement mold 23 is provided with a pressure-holding and inflation port 231. The lower vacuum box 21 is provided with an air injection port 211 and a vacuum extraction port 212. The air injection port 211 and the pressure-holding and inflation port 231 are connected by an air pipe. The air injection port 211 is connected to an external air source and a detector, while the vacuum extraction port 212 is connected to an external vacuum pump. In this invention, the bed 1 can be equipped with multiple testing mechanisms 2 as needed. This allows for the simultaneous testing of multiple products 3 (castings, elbows, tees, straight connectors, valves, and other fluid connections), greatly improving production efficiency. This only requires increasing the size of the bed 1.

[0030] Example 2: This can be explained based on Example 1, such as... Figure 1 , Figure 2 and Figure 3 The upper vacuum box device 22 includes an application power source 221 disposed on the bed 1 and an upper vacuum cover 222 disposed on the application power source 221. The upper vacuum cover 222 corresponds exactly to the lower vacuum box 21. The opening and closing of the application power source 221 causes the upper vacuum cover 222 to cover the lower vacuum box 21 to form a sealed chamber.

[0031] Among them, such as Figure 1 , Figure 2 and Figure 3 The power source 221 is a cylinder or a hydraulic cylinder. When in use, the cylinder or hydraulic cylinder causes the upper vacuum cover 222 to move downward until the upper vacuum cover 222 is aligned with the lower vacuum box 21 and sealed. The upper vacuum cover 222 and the lower vacuum box 21 form a sealed chamber.

[0032] Example 3: This can be described based on Example 1 or Example 2, such as... Figure 2 As shown, a sealing ring 213 is provided on the upper surface of the lower vacuum box 21. The sealing ring 213 greatly improves the sealing performance of the upper vacuum cover 222 and the lower vacuum box 21 after sealing.

[0033] Example 4: This can be described based on Example 1, Example 2, or Example 3, such as... Figure 2 As shown, a boss 214 is provided on the upper surface of the lower vacuum box 21, and an upper tooth is provided on the boss 214. A lower tooth is provided on the lower surface of the placement mold 23. The interaction between the lower tooth and the upper tooth can adjust the position of the placement mold 23 on the lower vacuum box 21. The interaction between the lower and upper teeth facilitates the movement and adjustment of the distance of the placement mold 23. The distance of the placement mold 23 can be adjusted according to the length of the product 3 to be tested, so that one placement mold 23 can be used to test multiple products 3, thereby improving mold utilization and saving costs.

[0034] Example 5: This can be described based on Example 1, Example 2, Example 3, or Example 4, such as... Figure 4 As shown, a sealing gasket 24 is provided on the placement mold 23, which helps to improve the sealing performance. Since the air injection hole 211 and the pressure holding and inflation hole 231 are connected through an air pipe, the air injection hole 211 is connected to an external air source and detector.

[0035] like Figure 1 and Figure 4 As shown, in this embodiment, the mold 23 is placed using symmetrically distributed tooling seats. Each tooling seat is locked onto the lower vacuum box 21 by a fixing component, and the upper surface of each tooling seat is inclined, with a sealing gasket 24 installed on the inclined surface. The fixing components are screws or bolts, which facilitate disassembly and installation.

[0036] Example 6: This can be described based on Example 1, Example 2, Example 3, Example 4, or Example 5, such as... Figure 1 As shown, the air source is an air pump, which facilitates air filling, and the detector is a pressure gauge, such as a pressure gauge.

[0037] The steps for using this utility model are as follows:

[0038] The first step involves placing the product to be tested (such as castings, elbows, tees, straight sections, valves, and other fluid connectors) on the sealing gasket 24 of the mold 23.

[0039] The second step is to activate the power source 221. The power source 221 will cause the upper vacuum cover 222 to move downward until it covers the lower vacuum box 21. The upper vacuum cover 222 and the lower vacuum box 21 are completely sealed and closed to form a closed chamber, in which the product 3 to be tested is located.

[0040] The third step involves connecting the air injection port 211 and the pressure-holding inflation port 231 via an air pipe. The air injection port 211 is connected to an external air source (such as an air pump) and a detector (such as a pressure gauge). In this way, inflation is carried out through the air source (such as an air pump). The inflation time is set according to the time (such as 10 seconds) and then inflation is stopped. At this time, the pressure-holding state is maintained.

[0041] Fourthly, since the vacuum hole 212 is connected to an external vacuum pump, when the vacuum pump is working, the vacuum adds suction to the product 3 being tested. If the product 3 being tested has quality problems such as air holes, sand holes, or looseness, the internal pressure-holding gas is sucked out through these air holes, sand holes, or looseness. Once the pressure-holding gas inside the product 3 being tested is sucked out, a significant change in the pressure gauge indicates that the product 3 is leaking. This greatly shortens the testing time and improves testing efficiency.

[0042] This invention combines pressure holding and vacuuming simultaneously, which saves testing time and greatly improves testing efficiency. It also helps to detect whether the tested product 3 with slight (slow) air leakage is qualified, preventing unqualified or defective workpieces from entering the market and making it more conducive to meeting production requirements.

[0043] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, cylinders and hydraulic cylinders that are mature in the prior art. The internal components of the air pump, pressure gauge and vacuum pump all adopt conventional models in the prior art, and their internal structure is a prior art structure. Workers can complete normal operation by referring to the existing technical manual. In addition, the circuit connection adopts conventional connection methods in the prior art, and will not be described in detail here.

[0044] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A sealing pressure holding and vacuum testing device, comprising a bed (1) and a testing mechanism (2), characterized in that: The testing mechanism (2) includes a lower vacuum box (21) and an upper vacuum box device (22) set on the bed (1). The lower vacuum box (21) is provided with a placement mold (23) for placing the product (3) to be tested. The placement mold (23) is provided with a pressure-holding and inflation hole (231). The lower vacuum box (21) is provided with an air injection hole (211) and a vacuum extraction hole (212). The air injection hole (211) and the pressure-holding and inflation hole (231) are connected through an air pipe. The air injection hole (211) is connected to an external air source and a detector. The vacuum extraction hole (212) is connected to an external vacuum pump.

2. The sealing pressure holding and vacuum testing equipment as described in claim 1, characterized in that: The upper vacuum box device (22) includes an application power source (221) disposed on the bed (1) and an upper vacuum cover (222) disposed on the application power source (221). The upper vacuum cover (222) corresponds exactly to the lower vacuum box (21). The opening and closing of the application power source (221) causes the upper vacuum cover (222) to cover the lower vacuum box (21) to form a sealed chamber.

3. The sealing pressure holding and vacuum testing equipment as described in claim 2, characterized in that: The power source (221) is a cylinder or a hydraulic cylinder.

4. The sealing pressure holding and vacuum testing equipment as described in claim 1, 2, or 3, characterized in that: A sealing ring (213) is provided on the upper surface of the lower vacuum box (21).

5. The sealing pressure holding and vacuum testing equipment as described in claim 1, 2, or 3, characterized in that: The upper surface of the lower vacuum box (21) is provided with a boss (214), the boss (214) is provided with an upper tooth, the lower surface of the placement mold (23) is provided with a lower tooth, and the lower tooth and the upper tooth cooperate with each other.

6. The sealing pressure holding and vacuum testing equipment as described in claim 5, characterized in that: The placement mold (23) is provided with a sealing gasket (24).

7. The sealing pressure holding and vacuum testing equipment as described in claim 6, characterized in that: The placement mold (23) uses symmetrically distributed tooling seats. Each tooling seat is locked to the boss (214) of the lower vacuum box (21) by a fastener. The upper surface of each tooling seat is inclined at 45 degrees, and the sealing gasket (24) is installed on the inclined surface.

8. The sealing pressure holding and vacuum testing equipment as described in claim 7, characterized in that: The fastener is a screw or bolt.

9. The sealing pressure holding and vacuum testing equipment as described in claim 1, 2, 3, 6, 7, or 8, characterized in that: The gas source is an air pump, and the detector is a pressure gauge.

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