Online calibrator for integrated breather valve and micro-pressure safety valve

Abstract

The utility model relates to an online calibrator for an integrated breather valve and a micro-pressure safety valve, and belongs to the technical field of valve calibration devices. According to the utility model, all the operating valves and the pressure gauge are communicated through the criss-cross internal hole channels processed in the upper shell, the operating valves are embedded in the valve clamping grooves through the clamping connecting pieces and are butted with the end surfaces of the internal hole channels, and the pressure gauge is connected to the pressure gauge mounting position of the upper shell through threads; according to the utility model, all the components are integrated on an integrated block through the above modes, and compared with a sleeved structure in which all the components are integrated in a tool box, the integrated module is more compact and more reliable. According to the utility model, a space is dug in the lower shell to store pressure (that is, the gas storage tank and the lower shell are of an integrated structure), and an external gas storage tank is not used, so that the compactness and reliability of the equipment structure are further improved.

Description

Technical Field

[0001] This utility model relates to an integrated online calibrator for a breather valve and a micro-pressure safety valve, belonging to the technical field of valve calibration devices. Background Technology

[0002] A breather valve is a type of valve that ensures the storage tank space is isolated from the atmosphere within a certain pressure range, but also allows it to breathe when the pressure exceeds or falls below this range. A safety valve is a special valve whose opening and closing element is normally closed under external force. When the pressure of the medium in the equipment or pipeline rises above a specified value, it releases the medium to the outside of the system to prevent the pressure of the medium in the pipeline or equipment from exceeding the specified value. A calibrator is a laboratory device used to adjust, verify, and test equipment, instruments, and meters within its applicable range.

[0003] Breather valves and safety valves are both safety devices that protect pressure pipelines and pressure vessels. When the pressure exceeds the set value, they need to be released or drawn in promptly and accurately to protect the equipment from exceeding the pressure limit. To achieve this purpose, breather valves and safety valves need to be calibrated before leaving the factory, before installation and use, and after maintenance. In addition, they also need to be calibrated regularly according to regulations. Problems must be identified and addressed; otherwise, there will be significant safety hazards.

[0004] This invention is only applicable to breather valves and low-pressure safety valves, and not to high-pressure safety valves, so it will not be discussed further. "Low-pressure safety valve" refers to a safety valve with a low opening pressure; this is a general term in the field and does not imply a limitation on a specific pressure value. Currently, most breather valves and low-pressure safety valves are calibrated offline (i.e., the valve is removed from the equipment and calibrated on an offline calibration test bench), and offline calibration test benches are relatively mature. However, some valves are difficult to disassemble or the site conditions do not allow for disassembly, so online calibration methods must be used (online calibration means calibrating the valve directly on the equipment without disassembly or disconnection, using technical means).

[0005] Current online verification implementation schemes mainly adopt, for example... Figure 1 The equipment solution shown is being verified. The online verification process is as follows:

[0006] 1. When calibrating the positive pressure function, close the shut-off valves corresponding to the vacuum source and negative pressure gauge to avoid damage to the negative pressure components and pressure leakage. Allow pressurized gas to enter the gas storage tank (for pressure stabilization). Connect the test line to the valve under test via a dedicated interface. Close the shut-off valve on the pressure relief side, then slowly open the calibration valve (adjusting needle valve) to allow air pressure to enter the valve under test until it opens. Simultaneously record the reading on the precision calibration gauge; this indicates the opening pressure of the valve. Then close the calibration valve and open the shut-off valve on the pressure relief side to release pressure. Repeat the test three times. This completes the calibration of the valve under test. Any valves that fail the calibration can be adjusted or repaired.

[0007] 2. When calibrating the negative pressure function, close the shut-off valves corresponding to the pressure gas source and positive pressure gauge to avoid damage to the positive pressure components and pressure leakage. Simultaneously, start the vacuum generator to allow a vacuum source to flow into the gas storage tank. Connect the test line to the valve under test via a dedicated interface. Close the shut-off valve on the pressure relief port side, then slowly open the calibration valve (adjusting needle valve) to draw out the pressure inside the valve under test until the valve opens. Simultaneously record the reading of the precision calibration gauge; the opening pressure of the valve under test will then be known. Next, close the calibration valve and open the shut-off valve on the pressure relief port side to release pressure. Repeat the test three times. This completes the calibration of the valve under test. Any valves that fail the calibration can be adjusted or repaired.

[0008] Current calibration equipment is generally assembled on-site from independent gas storage tanks, shut-off valves, pipelines, meters, connectors, vacuum generators, and other components. This modular calibration equipment has a messy and loose structure, is not aesthetically pleasing, and is not easy to carry. It requires assembly every time it is used and disassembly after use, which is time-consuming and labor-intensive. Furthermore, because there are many connection points and frequent assembly and disassembly, leaks are likely to occur, making it difficult to maintain a long-term high-performance sealing effect.

[0009] In addition, a small number of devices are assembled by installing various equipment in a toolbox and connecting them with pipes. Although this eliminates the need for assembly and disassembly on-site, the overall size is large, the weight is heavy, there are many joints, and the possibility of leakage is also greater. Utility Model Content

[0010] The technical problem to be solved by this utility model is to provide an integrated online calibrator for breather valves and micro-pressure safety valves that is compact, easy to carry, and highly reliable.

[0011] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an integrated online calibrator for breather valves and micro-pressure safety valves, including operating valves, pressure gauges, precision calibration gauges, gas storage tanks, and a vacuum generator. The operating valves include a first shut-off valve, a second shut-off valve, a third shut-off valve, a fourth shut-off valve, a fifth shut-off valve, a sixth shut-off valve, and a test valve. The pressure gauges include positive pressure gauges and negative pressure gauges. This utility model also includes an upper shell and a lower shell fixedly connected together by a first bolt. The gas storage tank and the vacuum generator are both fixedly installed inside the lower shell. The outer end face of the lower shell is provided with a vacuum exhaust port connected to the exhaust end of the vacuum generator. The side end face of the upper shell is provided with a pressure gas source interface, a vacuum drive gas source interface, a pressure relief port, and a valve interface to be tested. The lower surface of the upper shell is provided with an upper shell first interface, an upper shell second interface, and an upper shell third interface. The top surface of the upper shell is provided with a precision calibration gauge interface for connecting an external precision calibration gauge. The top surface of the upper shell is provided with valve slots corresponding to the operating valves. Each operating valve has a locking connector fixedly installed at both ends of its interface. The operating valve and the locking connector are nested into the valve slot, ensuring a tight connection between the operating valve's interface and the internal channel on the inner wall of the valve slot. The first interface of the first shut-off valve is connected to the pressure gas source interface through an internal channel, and the second interface is connected to the first interface of the upper housing through an internal channel. The first interface of the second shut-off valve is connected to the vacuum drive gas source interface through an internal channel, and the second interface is connected to the second interface of the upper housing through an internal channel. The first interface of the third shut-off valve is connected to the upper housing through an internal channel. The first interface is connected, and the second interface is connected to the third interface of the upper housing through an internal channel; the first interface of the fourth shut-off valve is connected to the pressure relief port through an internal channel, and the second interface is connected to the first interface of the test valve through an internal channel; the first interface of the test valve is connected to the interface of the valve to be tested through an internal channel, and the second interface of the test valve is connected to the third interface of the upper housing through an internal channel; the inner end of the precision calibration gauge interface is connected to the internal channel between the first interface of the test valve and the interface of the valve to be tested; the top surface of the upper housing is provided with threaded connection ports corresponding to the pressure gauges, and the connection end of the pressure gauge is connected to... The outer end of the threaded connection is connected by a thread and a sealant is provided at the connection point. The positive pressure gauge is connected to the first interface end of the fifth shut-off valve through the threaded connection and internal channel. The negative pressure gauge is connected to the first interface end of the sixth shut-off valve through the threaded connection and internal channel. The second interface ends of the fifth shut-off valve and the sixth shut-off valve are respectively connected to the first interface of the upper shell through internal channels. The first interface of the upper shell is connected to the first interface of the lower shell located on the gas storage tank. The second interface of the upper shell is connected to the drive gas source connector of the vacuum generator. The third interface of the upper shell is connected to the negative pressure connector of the vacuum generator.

[0012] A further preferred embodiment is that the axes of the first bolts are all vertically oriented, the axes of the first interface of the upper housing and the first interface of the lower housing are both vertically oriented, the first interface of the upper housing and the first interface of the lower housing are connected by a plug-in method, and a first rubber sealing ring is provided between the mating surfaces of the two.

[0013] A further preferred embodiment is that the second interface of the upper housing is connected to the drive gas source connector of the vacuum generator via a flexible hose.

[0014] A further preferred embodiment is that the third interface of the upper housing is connected to the negative pressure connector of the vacuum generator via a flexible hose.

[0015] A further preferred embodiment is that the snap-fit ​​connector is made of Teflon, and a second rubber sealing ring is provided at the end face where the snap-fit ​​connector meets the internal channel, and the outer periphery of the second rubber sealing ring is sealed with liquid self-curing adhesive.

[0016] A further preferred option is that the gas storage tank and the lower shell are an integral structure.

[0017] A further preferred embodiment is that baffles are fixed to the rear sides of the upper and lower housings by a second bolt.

[0018] A further preferred embodiment is that a panel is fixed to the top surface of the upper housing by a third bolt, and the panel has windows that match the various operating valves, pressure gauges, and precision calibration gauges.

[0019] The beneficial effects of this utility model are as follows: It integrates components such as the shut-off valve, calibration valve, pressure gauge, precision calibration gauge, and pipelines into the upper integrated block, resulting in a compact structure, eliminating the need for disassembly, and ensuring more reliable sealing. The integrated design reduces the number of joints, and these joints can be sealed tightly and reliably, thus effectively guaranteeing long-term high-efficiency sealing performance. By utilizing the internal space of the lower shell for pressure storage (i.e., the gas storage tank and lower shell are an integrated structure), an external gas storage tank is eliminated, making the equipment structure more compact and reliable. The dual integrated block configuration of "upper shell + lower shell" facilitates processing and manufacturing, and allows for flexible and convenient modifications. For example, if the gas storage tank volume needs to be changed, only the simpler lower shell needs to be replaced, eliminating the need to replace the most complex and expensive upper shell. This utility model integrates all components into one unit, resulting in a simple and aesthetically pleasing appearance that is easy to carry; it also eliminates the need for on-site assembly, making it convenient and practical. Attached Figure Description

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

[0021] Figure 2 This is a three-dimensional structural diagram of the assembled utility model.

[0022] Figure 3This is a schematic diagram of the upper shell of this utility model (only some operating valves are installed).

[0023] Figure 4 This is a schematic diagram of the structure of the lower shell in this utility model.

[0024] Figure 5 This is a schematic diagram of the overall structure of the operating valve and the locking connector in this utility model.

[0025] Figure 6 This is a schematic diagram of the internal channel circuit connection principle in this utility model (the dotted lines in the figure represent the connection circuit relationships).

[0026] Component markings in the diagram: Test valve 10, First shut-off valve 11, Second shut-off valve 12, Third shut-off valve 13, Fourth shut-off valve 14, Fifth shut-off valve 15, Sixth shut-off valve 16, Inspection valve 17, Snap-fit ​​connector 18, Sealing ring mounting groove 19, Positive pressure gauge 21, Negative pressure gauge 22, Precision calibration gauge 30, Gas storage tank 40, Vacuum generator 50, Upper housing 60, Valve slot 61, Internal channel 62, Pressure gas source interface 63, Vacuum drive gas source interface 64, Pressure relief port 65, Test valve interface 66, Precision calibration gauge interface 67, Identification plate 68, Lower housing 70, Vacuum exhaust port 71, Lower housing first interface 72, Baffle 80, Panel 90. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 6 As shown, this utility model includes operating valves, pressure gauges, a precision calibration gauge 30, a gas storage tank 40, and a vacuum generator 50. The operating valves include a first shut-off valve 11, a second shut-off valve 12, a third shut-off valve 13, a fourth shut-off valve 14, a fifth shut-off valve 15, a sixth shut-off valve 16, and a test valve 17. The pressure gauges include a positive pressure gauge 21 and a negative pressure gauge 22. Preferably, the first shut-off valve 11, second shut-off valve 12, third shut-off valve 13, fourth shut-off valve 14, fifth shut-off valve 15, and sixth shut-off valve 16 are ball valves, and the test valve 17 is preferably a regulating needle valve.

[0029] This utility model also includes an upper housing 60 and a lower housing 70 fixedly connected together by a first bolt. The gas storage tank 40 and the vacuum generator 50 are both fixedly installed inside the lower housing 70. The outer end face of the lower housing 70 is provided with a vacuum exhaust port 71 connected to the exhaust end of the vacuum generator 50. The side end face of the upper housing 60 is provided with a pressure gas source interface 63, a vacuum drive gas source interface 64, a pressure relief port 65, and a valve under test interface 66. The valve under test interface 66 is used to connect the valve under test 10 via a pipe. The lower surface of the upper housing 60 is provided with an upper housing first interface, an upper housing second interface, and an upper housing third interface. The top surface of the upper housing 60 is provided with a precision calibration meter interface 67 for connecting an external precision calibration meter 30. Each operating valve is provided with a valve slot 61 corresponding to one of its operating valves. Each operating valve has two fixedly mounted engaging connectors 18 at its two ends. The operating valve and engaging connectors 18 are nested into the valve slot 61, ensuring a tight connection between the operating valve's end and the internal passage 62 on the inner wall of the valve slot 61. The first end of the first shut-off valve 11 is connected to the pressure gas source interface 63 via the internal passage 62, and the second end is connected to the first interface of the upper housing via the internal passage 62. The first end of the second shut-off valve 12 is connected to the vacuum drive gas source interface 64 via the internal passage 62, and the second end is connected to the second interface of the upper housing via the internal passage 62. The first end of the third shut-off valve 13 is connected to the vacuum drive gas source interface 64 via the internal passage 62. The first interface of the pressure gauge 62 is connected to the first interface of the upper housing, and the second interface is connected to the third interface of the upper housing through the internal channel 62; the first interface of the fourth shut-off valve 14 is connected to the pressure relief port 65 through the internal channel 62, and the second interface is connected to the first interface of the test valve 17 through the internal channel 62; the first interface of the test valve 17 is connected to the interface 66 of the valve to be tested through the internal channel 62, and the second interface of the test valve 17 is connected to the third interface of the upper housing through the internal channel 62; the inner end of the precision calibration gauge interface 67 is connected to the internal channel 62 between the first interface of the test valve 17 and the interface 66 of the valve to be tested; the top surface of the upper housing 60 is provided with threaded connection ports corresponding to the pressure gauges, and the connection end of the pressure gauge is connected to the threaded connection port. The outer end is connected by a thread and a sealant is provided at the connection point (either by wrapping with sealing tape or sealing with liquid self-curing adhesive). The positive pressure gauge 21 is connected to the first interface end of the fifth shut-off valve 15 through the threaded connection port and the internal channel 62. The negative pressure gauge 22 is connected to the first interface end of the sixth shut-off valve 16 through the threaded connection port and the internal channel 62. The second interface ends of the fifth shut-off valve 15 and the sixth shut-off valve 16 are respectively connected to the first interface of the upper shell through the internal channel 62. The first interface of the upper shell is connected to the first interface 72 of the lower shell located on the gas storage tank 40. The second interface of the upper shell is connected to the drive gas source connector of the vacuum generator 50. The third interface of the upper shell is connected to the negative pressure connector of the vacuum generator 50.

[0030] The working method of this utility model is exactly the same as the online verification operation process described in the background section above. The key technical point of this utility model is that all the operating valves and pressure gauges are connected through the crisscrossing internal channels 62 machined inside the upper housing. The operating valves are embedded in the valve slots 61 and are in contact with the end faces of the internal channels 62 (the locking connectors 18 at both ends of the operating valves are configured according to the actual shape of each shut-off valve and test valve 17, so that the valves can be fixed inside. The outer end face of the locking connector 18 is adapted to the valve slots 61). In order to make the structure more practical and improve the sealing reliability, the locking connectors 18 are preferably made of Teflon. A second rubber sealing ring is provided at the end face of the locking connector 18 and the internal channel 62, and the outer circumference of the second rubber sealing ring is sealed with liquid self-curing adhesive to achieve a reliable seal. In the preferred embodiment, the end face of the locking connector 18 is provided with a sealing ring mounting groove 19 for installing the second rubber sealing ring. The pressure gauge is threaded to the pressure gauge mounting position on the upper housing 60, and sealant is applied to achieve a sealing effect. These methods integrate the various components into a single integrated block. Furthermore, compared to a kit structure that concentrates all components in a toolbox, this invention is more compact and reliable.

[0031] To enhance structural reliability, the gas storage tank 40 and the lower shell 70 are preferably integrated. This means that a portion of the lower shell 70 is used to securely mount the vacuum generator 50, while the remaining solid portion is hollowed out and then welded shut at the end faces. The resulting chamber serves as the gas storage tank 40. Similarly, the upper shell 60 can be provided with several machining holes to facilitate the machining of the internal channels 62. After the internal channels 62 are machined, these machining holes are then welded shut.

[0032] To make the structure more reliable, the axes of the first bolts are all set vertically, the axes of the first interface 72 of the upper shell and the first interface 72 of the lower shell are all set vertically, the first interface 72 of the upper shell and the first interface 72 of the lower shell are connected by a plug-in method, and a first rubber sealing ring is provided between the mating surfaces of the two.

[0033] To make the structure more reliable, the second interface of the upper housing is connected to the drive air source connector of the vacuum generator 50 via a flexible hose.

[0034] To make the structure more reliable, the third interface of the upper housing is connected to the negative pressure connector of the vacuum generator 50 via a flexible hose.

[0035] To maintain the integrity and aesthetics of the equipment, baffles 80 are fixed to the rear sides of the upper housing 60 and the lower housing 70 by a second bolt.

[0036] To maintain the integrity and aesthetics of the equipment, a panel 90 is fixed to the top surface of the upper housing 40 by a third bolt. The panel 90 has windows that correspond to the various operating valves, pressure gauges, and precision calibration gauges 30. Furthermore, text labels can be added to the panel 90 to clearly indicate the functions and facilitate operation. Identification plates 68 can also be added to interfaces such as the pressure air source interface 63, vacuum drive air source interface 64, pressure relief port 65, and the interface for the valve being tested 66 to clearly indicate the function of each interface and avoid incorrect use.

Claims

1. An integrated online calibrator for a breathing valve and a micro-pressure safety valve, comprising an operating valve, a pressure gauge, a precision calibration gauge (30), a gas storage tank (40), and a vacuum generator (50), wherein the operating valve comprises a first shut-off valve (11), a second shut-off valve (12), a third shut-off valve (13), a fourth shut-off valve (14), a fifth shut-off valve (15), a sixth shut-off valve (16), and a test valve (17), and the pressure gauge comprises a positive pressure gauge (21) and a negative pressure gauge (22), characterized in that: The system includes an upper housing (60) and a lower housing (70) fixedly connected together by a first bolt. A gas storage tank (40) and a vacuum generator (50) are both fixedly installed inside the lower housing (70). The outer end face of the lower housing (70) is provided with a vacuum exhaust port (71) connected to the exhaust end of the vacuum generator (50). The side end face of the upper housing (60) is provided with a pressure gas source interface (63), a vacuum drive gas source interface (64), a pressure relief port (65), and a valve interface (66) to be tested. The lower surface of the upper housing (60) is provided with an upper housing first interface. The upper housing has a second interface and a third interface. The top surface of the upper housing (60) is provided with a precision calibration table interface (67) for connecting a precision calibration table (30) externally. The top surface of the upper housing (60) is provided with a valve slot (61) corresponding to each operating valve. Each operating valve has a locking connector (18) fixedly installed at both interface ends. The operating valve and the locking connector (18) are nested into the valve slot (61) as a whole, so that the interface end of the operating valve is in a sealed connection with the internal channel (62) at the inner wall of the valve slot (61). The first port of the first shut-off valve (11) is connected to the pressure gas source port (63) through the internal channel (62), and the second port is connected to the first port of the upper housing through the internal channel (62); the first port of the second shut-off valve (12) is connected to the vacuum drive gas source port (64) through the internal channel (62), and the second port is connected to the second port of the upper housing through the internal channel (62); the first port of the third shut-off valve (13) is connected to the first port of the upper housing through the internal channel (62), and the second port is connected to the third port of the upper housing through the internal channel (62); the first port of the fourth shut-off valve (14) is connected to the pressure relief port (65) through the internal channel (62), and the second port is connected to the first port of the test valve (17) through the internal channel (62); the first port of the test valve (17) is connected to the valve to be tested through the internal channel (62). (66) Connecting and testing valve (17) The second interface end is connected to the third interface of the upper housing through the internal channel (62); the inner end of the precision calibration gauge interface (67) is connected to the internal channel (62) between the first interface end of the testing valve (17) and the interface (66) of the valve to be tested; the top surface of the upper housing (60) is provided with threaded connection ports corresponding to the pressure gauges one by one, the connection end of the pressure gauge is connected to the outer end of the threaded connection port through the thread and a sealant is provided at the connection mating point, the positive pressure gauge (21) is connected to the first interface end of the fifth shut-off valve (15) through the threaded connection port and the internal channel (62), the negative pressure gauge (22) is connected to the first interface end of the sixth shut-off valve (16) through the threaded connection port and the internal channel (62), the second interface end of the fifth shut-off valve (15) and the second interface end of the sixth shut-off valve (16) are respectively connected to the first interface of the upper housing through the internal channel (62); The first interface of the upper shell is connected to the first interface (72) of the lower shell located on the gas storage tank (40), the second interface of the upper shell is connected to the drive gas source connector of the vacuum generator (50), and the third interface of the upper shell is connected to the negative pressure connector of the vacuum generator (50).

2. The integrated breathing valve and micro-pressure safety valve online calibrator as described in claim 1, characterized in that: The axes of the first bolts are all set vertically. The axes of the first interface of the upper shell and the first interface of the lower shell (72) are both set vertically. The first interface of the upper shell and the first interface of the lower shell (72) are connected by a plug-in method, and a first rubber sealing ring is provided between the mating surfaces of the two.

3. The integrated breathing valve and micro-pressure safety valve online calibrator as described in claim 1, characterized in that: The second interface of the upper housing is connected to the drive air source connector of the vacuum generator (50) via a hose.

4. The integrated breathing valve and micro-pressure safety valve online calibrator as described in claim 1, characterized in that: The third interface of the upper housing is connected to the negative pressure connector of the vacuum generator (50) via a hose.

5. The integrated breathing valve and micro-pressure safety valve online calibrator as described in claim 1, characterized in that: The snap-fit ​​connector (18) is made of Teflon. A second rubber sealing ring is provided at the end face of the snap-fit ​​connector (18) and the internal channel (62), and the outer circumference of the second rubber sealing ring is sealed with liquid self-curing adhesive.

6. The integrated breathing valve and micro-pressure safety valve online calibrator as described in claim 1, characterized in that: The gas storage tank (40) and the lower shell (70) are an integral structure.

7. The integrated breathing valve and micro-pressure safety valve online calibrator as described in claim 1, characterized in that: A baffle (80) is fixed to the rear side of the upper housing (60) and the lower housing (70) by a second bolt.

8. The integrated online calibrator for breather valves and micro-pressure safety valves as described in any one of claims 1 to 7, characterized in that: A panel (90) is fixed to the top surface of the upper housing (60) by a third bolt. The panel (90) has windows that match the operating valves, pressure gauges, and precision calibration gauges (30).

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