Sealing ring sealing performance verification device

Abstract

The utility model discloses a sealing ring leakproofness verification device, which comprises a shell, a cover plate, sealing elements, a pressure detection unit and a vacuumizing unit, each sealing element is provided with a plurality of first grooves, the plurality of sealing elements are fixed at a sealing port of the shell through the cover plate, and the cover plate, the sealing elements and the shell define a sealing cavity; the pressure detection unit and the vacuumizing unit are both connected with the sealing cavity. According to the utility model, the shell, the cover plate and the sealing element can define the sealing chamber, and the sealing chamber is vacuumized by using the vacuumizing unit, so that the vacuum environment of the sealing ring is simulated, the sealing performance of the sealing ring in the vacuum environment is detected, and the detection result is more reliable; in addition, the number of the sealing elements is multiple, and each sealing element is provided with multiple first grooves, so that batch detection of the sealing rings can be realized, and the detection efficiency is improved; and moreover, the first groove can be processed into different specifications during actual processing, so that the sealing performance detection of the sealing rings with different specifications is realized, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to the sealing property detection field of sealing ring, especially a sealing ring sealing property verification device. BACKGROUND

[0002] In the in-vitro device, the detection environment of many diagnostic devices is a vacuum environment (such as the detection chamber of a mass spectrometer), in order to meet the vacuum requirements of these devices, a sealing ring with low cost and high sealing reliability is used to seal to form a sealed chamber during actual installation. Among them, the sealing performance of the sealing ring directly affects the vacuum environment, and then affects the performance of the instrument. Therefore, before the sealing ring is put into the warehouse, the sealing performance test is usually needed to avoid the defective sealing ring from being assembled into the device to affect the vacuum degree of the device, and then affect the detection result and the normal detection of the user. At present, the existing sealing ring detection device can only detect one at a time (such as CN117606787A discloses a sealing ring test platform), and it often takes a certain time to reach the vacuum degree of the device, and the number of sealing rings put into the warehouse is often more, usually hundreds (even thousands), the detection time is long, and it is difficult to meet the high-throughput detection demand of batch sealing rings. SUMMARY

[0003] Therefore, the utility model provides a sealing ring sealing property verification device.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The sealing ring sealing property verification device, comprising a shell and a cover plate, further comprises a plurality of sealing pieces for fixing the sealing ring, a pressure detection unit and a vacuum pumping unit, a plurality of first grooves for clamping the sealing ring are formed on each sealing piece, and the plurality of sealing pieces are fixed at the sealing port of the shell through the cover plate, the cover plate, the sealing piece and the shell enclose a sealed chamber; the pressure detection unit and the vacuum pumping unit are connected with the sealed chamber. The beneficial effects are: the shell, the cover plate and the sealing piece of the utility model can enclose a sealed chamber, the vacuum pumping unit is used for pumping the sealed chamber, and then the vacuum environment of the sealing ring is simulated, the sealing performance of the sealing ring in the vacuum environment is detected, and the detection result is more reliable; in addition, a plurality of sealing pieces are fixed between the shell and the cover plate, each sealing piece has a plurality of first grooves, batch detection of the sealing ring can be realized, and the detection efficiency is improved; furthermore, the first grooves can be processed into different specifications during actual processing, and then the sealing performance detection of sealing rings of different specifications is realized, and the application range is wide.

[0006] Preferably, the sealing ring sealing property verification device, still include control unit, the control unit includes controller, display and alarm piece, the pressure detection unit's pressure signal output end is connected with the pressure signal input end of the controller, the signal input end of alarm piece is connected with the signal output end of controller, the display and controller communication connection, the control input end of the vacuum unit is connected with the control output end of controller, beneficial effect is: the present application utilizes pressure detection unit and transmits pressure signal to controller, the controller converts pressure signal into pressure value and displays through display, through alarm piece reminds staff whether the sealing performance of this batch sealing ring is qualified, realizes the automatic detection.

[0007] In an embodiment of the utility model, the pressure detection unit has a first pressure detection piece and a second pressure detection piece, and the detection parts of the first pressure detection piece and the second pressure detection piece are located in the sealing chamber, so that the vacuum pressure value in the sealing chamber can be monitored in real time.

[0008] In an embodiment of the utility model, the first pressure detection piece and the second pressure detection piece are sealingly installed on the side wall of the cover plate or the shell, thereby realizing flexible installation of the pressure detection pieces.

[0009] In a more preferred embodiment of the utility model, the first pressure detection piece is a low vacuum gauge, and the second pressure detection piece is a high vacuum gauge, thereby realizing detection of a wider vacuum degree range.

[0010] In a preferred embodiment of the utility model, the vacuum unit includes a mechanical pump and a molecular pump fixed on the side wall of the shell, the mechanical pump is connected with the molecular pump through a pipeline, and the molecular pump communicates with the inner cavity of the sealing chamber. When a low vacuum environment is needed during work, the mechanical pump works, and the sealing chamber is vacuumized by the mechanical pump. When a high vacuum environment is needed, the mechanical pump is started first, and then the molecular pump is started, and the mechanical pump and the molecular pump are combined to vacuumize, thereby ensuring the high vacuum degree of the sealing chamber.

[0011] In a preferred embodiment of the utility model, the sealing piece is a sealing plate arranged between the cover plate and the shell, the first groove is opened on the upper surface of the sealing plate, a plurality of sealing plates are stacked together and fixed on the shell through the cover plate, thereby realizing mutual sealing between the plurality of sealing plates; the top surface of the side wall of the shell is provided with a second groove, thereby increasing the detection quantity of each batch.

[0012] In another embodiment of the utility model, the sealing piece is a sealing plate arranged between the cover plate and the shell, the bottom surface of each sealing plate is provided with an annular groove recessed upward, the upper surface of the sealing plate is provided with an annular boss, a plurality of first grooves are arranged on the annular boss, and the annular boss and the annular groove of the sealing plate above it are clearance fitted. The top surface of the sidewall of the shell has a lower boss matched with the annular groove. In this embodiment, the boss is machined on the upper surface of the sealing plate and the groove is machined on the lower surface, which not only realizes the quick positioning and installation of the sealing plates, but also reduces the machining precision requirement of other parts outside the boss and the groove, thereby reducing the machining cost. Furthermore, when not in detection, the sealing plates can be stacked, and since the boss and the annular groove are clearance fitted, the sealing surfaces of both can be protected, and damage is avoided as much as possible.

[0013] In the preferred embodiment of the utility model, the lower boss and the annular groove of the sealing plate are clearance fitted, and the lower boss has a plurality of second grooves; or the lower boss and the annular groove of the sealing plate are sealingly connected. That is, the lower boss and the annular groove of the sealing plate can be sealed by a sealing ring clamped in the second groove, or the lower boss and the annular groove can be directly sealed by a sealing gasket, thereby ensuring the sealing performance of the sealed chamber.

[0014] Compared with the prior art, the utility model has the advantages that the shell, the cover plate and the sealing piece of the utility model can enclose a sealed chamber, a vacuum unit is used to vacuumize the sealed chamber, thereby simulating the vacuum environment of the sealing ring, detecting the sealing performance of the sealing ring in the vacuum environment, and the detection result is more reliable. In addition, the utility model fixes a plurality of sealing pieces between the shell and the cover plate, each sealing piece has a plurality of first grooves, batch detection of the sealing ring can be realized, and the detection efficiency is improved. Furthermore, the first grooves can be machined into different specifications during actual machining, thereby realizing sealing performance detection of sealing rings of different specifications, and the application range is wide. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the utility model.

[0016] Figure 2 is a front view schematic diagram (omitting the control unit) of the utility model.

[0017] Figure 3 is Figure 2 A-A direction schematic diagram of.

[0018] Figure 4 is the first kind of schematic diagram of the sealing plate of the utility model.

[0019] Figure 5 is another kind of schematic diagram of the sealing plate of the utility model.

[0020] Figure 6 is Figure 5 is an enlarged view of the sealing plate.

[0021] Figure 7 is a circuit principle block diagram of the utility model. DETAILED DESCRIPTION

[0022] The embodiments of the utility model will be described in detail below with reference to the drawings, and the embodiments are implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following embodiments.

[0023] It should be noted that, in the description of the utility model, the relationship terms such as 'first' and'second' are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations.

[0024] In the description of the utility model, unless otherwise explicitly specified and limited, the terms 'connected', 'connected' that can appear should be understood broadly, for example, can be fixedly connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0025] As Figures 1-4 shown, the sealing ring sealing property verification device of the utility model, including the casing 1 and the cover plate 2, still include multiple sealing pieces (namely sealing plate 3) for fixing sealing ring, pressure detection unit and vacuum unit, the upper surface of sealing plate 3 is equipped with multiple first grooves 4 for clamping sealing ring, multiple sealing pieces are fixed at the sealing mouth of casing 1 through cover plate 2 (cover plate 2, sealing plate 3 are fixed on casing 1 through screw), cover plate 2, sealing piece and casing 1 (clamp sealing ring) enclose a sealed chamber F, pressure detection unit and vacuum unit are connected with sealed chamber F. When working, the sealing ring (O-shaped sealing ring is taken as the verification object in this embodiment) of corresponding model is clamped in the first groove 4 corresponding to it, the sealed chamber F is vacuumized using vacuum unit, and the vacuum degree is detected using pressure detection unit, when the vacuum degree of sealed chamber F reaches the set vacuum threshold value within the specified time, it shows that the batch of sealing ring is qualified, if not, it shows that the batch of sealing ring is unqualified.

[0026] The shell 1, the cover plate 2 and the sealing element can surround the sealed chamber F, the sealed chamber F is vacuumized by the vacuumizing unit, and then the vacuum environment of the sealing ring is simulated, the sealing performance of the sealing ring in the vacuum environment is detected, and the detection result is more reliable; in addition, a plurality of sealing plates are fixed between the shell 1 and the cover plate 2, each sealing plate has a plurality of first grooves 4, the batch detection of the sealing ring can be realized, and the detection efficiency is improved; furthermore, the first grooves 4 can be processed according to relevant standards (for example, for an O-shaped sealing ring with a cross-section diameter of 1.8 mm, the depth of the first grooves 4 thereon is 1.28 mm+0.05 mm), and then the sealing performance detection of sealing rings of different specifications is realized, and the application range is wide.

[0027] In one preferred embodiment of the utility model, the sealing ring sealing performance verification device also includes control unit 5, control unit 5 includes controller, display 5.1 (preferably touch screen) and alarm piece, the pressure signal output end of pressure detection unit is connected with the pressure signal input end of controller, the signal input end of display 5.1 and alarm piece is all connected with the signal output end of controller, the control input end of vacuumizing unit is connected with the control output end of controller. When detecting, the pressure signal detected by pressure detection unit is transmitted to controller, and the pressure signal is converted into pressure value and is shown through display 5.1, and whether the sealing performance of the batch sealing ring is qualified is reminded to staff through alarm piece, realizes the automatic detection, and see Figure 6 .

[0028] In actual installation, the controller, power supply, display 5.1 and alarm piece can be integrated and installed together, convenient to transfer, and see Figure 1 ; the alarm piece is preferably red indicator light and green indicator light, when the vacuum degree of sealed chamber F reaches the set vacuum threshold value within the specified time, the green indicator light is lit, and the batch sealing ring is qualified, if the vacuum degree of sealed chamber F cannot reach the set threshold value within the specified time, the red indicator light is lit. The alarm piece can also adopt the form that the sound alarm and the indicator light are combined, when qualified, the "qualified" sound is reminded and the green indicator light is lit, and when unqualified, the "unqualified" sound is reminded and the red indicator light is lit.

[0029] It should be pointed out that the controller of the utility model can be a general processor, a special-purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors associated with a DSP core, a controller, a microcontroller, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) circuit, any other type of integrated circuit (IC), and a state machine, a PLC or an industrial computer with important computer properties and features. In the utility model, the controller is preferably a PLC.

[0030] In one preferred embodiment of the utility model, in combination with Figures 1-2 And Figure 7 It can be known that the pressure detection unit has a first pressure detection piece and a second pressure detection piece, the detection parts of the first pressure detection piece and the second pressure detection piece are located in the sealed chamber F, the first pressure detection piece detects the vacuum degree in a low vacuum environment, and the second pressure detection piece detects the vacuum degree in a high vacuum environment, so as to meet the sealing detection requirement of the sealing ring; wherein the signal output end of the low vacuum gauge 6 and the high vacuum gauge 7 is connected with the signal input end of the controller, and the control input end of the low vacuum gauge 6 and the high vacuum gauge 7 is connected with the control output end of the controller, the opening of the low vacuum gauge 6 and the high vacuum gauge 7 is controlled by the controller, and the detected signals are transmitted to the controller when the low vacuum gauge 6 and the high vacuum gauge 7 work, and the vacuum degree of the sealed chamber F is obtained by analyzing the signals by the controller.

[0031] In actual installation, the first pressure detection piece is preferably a low vacuum gauge 6 (a pressure sensor can also be used), the second pressure detection piece is preferably a high vacuum gauge 7 (a pressure sensor can also be used), the low vacuum gauge 6 is sealedly installed on the side wall of the shell 1 through a sealing ring (such as a KF16 sealing ring), the high vacuum gauge 7 is fixedly installed at the installation opening of the cover plate 2 through a KF16 sealing ring, and a through hole is formed in the middle position of each sealing plate 3, so that the detection part of the high vacuum gauge 7 is located in the sealed chamber F, and specific reference can be made to Figures 1-2 Of course, in actual installation, the low vacuum gauge 6 and the high vacuum gauge 7 can also be installed on the shell 1, and the high vacuum gauge 7 can be installed on the shell 1 and the low vacuum gauge 6 can be installed on the cover plate 2.

[0032] In combination with Figures 1-2 It can be known that the vacuumizing unit includes a mechanical pump 8 (the mechanical pump 8 is preferably a diaphragm pump) and a molecular pump 9 fixed on the side wall of the shell 1, the control input end of the mechanical pump 8 and the molecular pump 9 is connected with the control output end of the controller, and the opening of the mechanical pump 8 and the molecular pump 9 can be controlled according to the vacuum degree requirement. Of course, the mechanical pump 8 and the molecular pump 9 can also be manually controlled; the mechanical pump 8 is connected with the molecular pump 9 through a pipeline (with an electric control valve), the molecular pump 9 communicates with the inner cavity of the sealed chamber F, and another gas suction port of the mechanical pump 8 also communicates with the sealed chamber F. When a low vacuum working environment of the sealing ring needs to be simulated, the sealed chamber F is vacuumized by the mechanical pump 8, when a high vacuum environment needs to be simulated, the mechanical pump 8 is started first, the molecular pump 9 is started after a certain vacuum degree is reached, and then the mechanical pump 8 and the molecular pump 9 are combined to vacuumize, so as to ensure the high vacuum degree of the sealed chamber F.

[0033] In combination with Figures 3-4It can be known that the first groove 4 is arranged on the upper surface of the sealing plate 3, a plurality of sealing plates 3 are stacked together, and the sealing plates 3 are fixed on the shell 1 through the cover plate 2; the top surface of the side wall of the shell 1 is provided with a second groove, and the detection quantity is improved. The sealing ring is clamped in the first groove 4 and the second groove, the sealing plate 3, the cover plate 2 and the shell 1 are fixed and clamped together through screws to form a sealed chamber F, and the batch detection of the sealing ring is realized. In actual detection, the number of sealing plates 3 can be adjusted to flexibly adjust the detection quantity.

[0034] In detection, the sealing ring to be detected is clamped in the second groove, the sealing plate 3 is placed on the shell 1, the sealing ring to be detected is clamped in the first groove 4 on the upper surface of the sealing plate 3, and a plurality of sealing plates 3 are repeatedly placed in this way; then the cover plate 2 is covered, and the cover plate 2 and the sealing plate 3 are fixed on the shell 1 through screws; the mechanical pump 8 is started, the mechanical pump 8 is used to pump the sealed chamber F, the low vacuum gauge 6 is used to detect the vacuum degree, the molecular pump 9 and the high vacuum gauge 7 are started when the vacuum degree reaches 1x10 -1 mbar, the high vacuum gauge 7 is used to detect the vacuum degree, the mechanical pump 8 and the molecular pump 9 are combined to pump the sealed chamber F, and when the vacuum degree of the sealed chamber F reaches the set threshold value within a limited time, it is indicated that the batch of sealing rings is qualified; if the set threshold value cannot be reached within the limited time, it is indicated that the batch of sealing rings is unqualified.

[0035] In another embodiment of the utility model, in combination Figures 5-6 It can be known that the bottom surface of the sealing plate 3 is provided with an upwardly recessed annular groove 3a, the upper surface of the sealing plate 3 is provided with an annular boss 3b, the annular boss 3b and the annular groove 3a correspond to each other in up-down direction, the first groove 4 is arranged on the annular boss 3b in a spaced manner to meet the detection requirements of sealing rings with different diameters, the annular boss 3b of the lower sealing plate 3 and the annular groove 3a of the sealing plate 3 located above the lower sealing plate 3 are clamped together to facilitate positioning and assembly, and a certain gap (about 1mm) exists between the annular boss 3b and the annular groove 3a to avoid collision between the annular boss 3b and the annular groove 3a in non-detection, protect the sealing surfaces of the annular boss 3b and the annular groove 3a and avoid damage as much as possible. The concave-convex structure between the sealing plates 3 can reduce the area of the sealing surface, and only the machining precision of the sealing surface of the annular boss 3b and the sealing surface of the annular groove 3a needs to be ensured in actual machining, and the machining cost of the sealing plate 3 is reduced.

[0036] In combination Figure 5It can be seen that, in order to ensure the sealed connection between the sealing plate 3 and the shell 1, the top surface of the side wall of the shell 1 has a lower boss 1a matched with the annular groove 3a, the lower boss 1a and the annular groove 3a of the sealing plate 3 are in clearance fit, the lower boss 1a has a plurality of second grooves, and the sealing is realized by a sealing ring clamped into the second grooves, which increases the detection quantity to a certain extent; of course, a ring-shaped sealing gasket can be fixed on the lower boss 1a to realize the sealed connection between the lower boss 1a and the sealing plate 3.

[0037] Finally, it should be emphasized that the above description is only the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions recorded in the foregoing embodiments without creative labor, or make equivalent replacements to some technical features. Therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A seal ring leak verification device comprising a housing and a cover plate, characterized by: The sealing ring fixing seal, pressure detection unit and vacuum pumping unit are also included, a plurality of first grooves for clamping the sealing ring are formed on each of the seal, and the plurality of seals are fixed at the sealing opening of the shell through the cover plate, and the cover plate, seal and shell form a sealed chamber; the pressure detection unit and the vacuum pumping unit are connected with the sealed chamber.

2. The seal integrity verification apparatus of claim 1, wherein: The control unit is also included, the control unit includes a controller, a display and an alarm, the pressure signal output end of the pressure detection unit is connected with the pressure signal input end of the controller, the signal input end of the alarm is connected with the signal output end of the controller, the display and the controller are in communication connection, and the control input end of the vacuum pumping unit is connected with the control output end of the controller.

3. The seal integrity verification apparatus of claim 1, wherein: The pressure detection unit has a first pressure detection element and a second pressure detection element, and the detection parts of the first pressure detection element and the second pressure detection element are located in the sealed chamber.

4. The seal integrity verification apparatus of claim 3, wherein: The first pressure detection element and the second pressure detection element are sealingly installed on the side wall of the cover plate or the shell.

5. The seal integrity verification apparatus of claim 3 or 4, wherein: The first pressure detection element is a low vacuum gauge, and the second pressure detection element is a high vacuum gauge.

6. The seal integrity verification apparatus of claim 1, wherein: The vacuum pumping unit includes a mechanical pump and a molecular pump fixed on the side wall of the shell, the mechanical pump is connected with the molecular pump through a pipeline, and the molecular pump is in communication with the inner cavity of the sealed chamber.

7. The seal integrity verification apparatus of claim 1, wherein: The seal is a sealing plate arranged between the cover plate and the shell, the first grooves are formed on the upper surface of the sealing plate, and the top surface of the side wall of the shell is provided with second grooves.

8. The seal integrity verification apparatus of claim 1, wherein: The seal is a sealing plate arranged between the cover plate and the shell, the bottom surface of each of the sealing plates is provided with an upwardly recessed annular groove, the upper surface of the sealing plate is provided with an annular boss, a plurality of first grooves are formed on the annular boss, the annular boss is in clearance fit with the annular groove of the sealing plate located above the annular boss, and the top surface of the side wall of the shell has a lower boss in upward and downward fit with the annular groove.

9. The seal integrity verification apparatus of claim 8, wherein: The lower boss and the annular groove of the sealing plate are in clearance fit, and the lower boss is provided with a plurality of second grooves; or the lower boss and the annular groove of the sealing plate are sealingly connected. The lower boss and the annular groove of the sealing plate are in clearance fit, and the lower boss is provided with a plurality of second grooves; or the lower boss and the annular groove of the sealing plate are sealingly connected.

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