A debugging device for an absolute pressure gauge

Abstract

The utility model discloses a kind of debugging device of absolute pressure gauge, comprising: cabinet, operating glove, absolute pressure gauge fixed seat and vacuum generating equipment, wherein, cabinet is the sealing structure of openable and closable, cabinet has the observation window of perspective;Operating glove is sealingly connected with cabinet, and operating glove is inserted in the inside of cabinet;Absolute pressure gauge fixed seat is set in the inside of cabinet, and is used to fix the absolute pressure gauge to be debugged, operating glove can reach absolute pressure gauge fixed seat;Vacuum generating equipment is sealingly connected with cabinet, and can vacuumize the inside of cabinet. Absolute pressure gauge is set in the cabinet structure of good sealing, and the vacuum degree in cabinet is controlled using external vacuum generating equipment, so that absolute pressure gauge is always in vacuum state in the process of debugging, i.

Description

Technical Field

[0001] This utility model relates to the technical field of absolute pressure gauges, and in particular to a device for adjusting an absolute pressure gauge. Background Technology

[0002] A mechanical absolute pressure gauge (absolute pressure gauge for short) is a mechanical instrument used to monitor or measure the absolute pressure in certain vacuum equipment, such as vacuum packaging machinery and vacuum pumps. It can also measure the condensation pressure and liquid vapor pressure of the equipment. Absolute pressure gauges are not affected by atmospheric pressure fluctuations when measuring absolute pressure, and therefore are widely used. Absolute pressure refers to the pressure above absolute pressure zero (absolute vacuum) as a reference.

[0003] Currently, the calibration method for absolute pressure gauges can result in inaccurate atmospheric pressure measurements, especially when calibrating to atmospheric pressure calibration points with lower values, where the error can be significant. Utility Model Content

[0004] In view of this, the present invention provides a calibration device for an absolute pressure gauge, which improves the accuracy of the calibration point measurement of the absolute pressure gauge and reduces errors.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An absolute pressure gauge adjustment device, comprising:

[0007] The cabinet is an openable and closable sealed structure, and the cabinet has a transparent observation window;

[0008] Operating gloves, which are sealed to the cabinet and extend into the interior of the cabinet;

[0009] Absolute pressure gauge mounting base, the absolute pressure gauge mounting base is set inside the cabinet and is used to fix the absolute pressure gauge to be tested, and the operating gloves can reach the absolute pressure gauge mounting base;

[0010] A vacuum generating device is sealed to the cabinet and is capable of evacuating the interior of the cabinet.

[0011] Preferably, in the above-mentioned absolute pressure gauge debugging device, there are two operating gloves, which are distributed on both sides of the absolute pressure gauge fixing base.

[0012] Preferably, the above-mentioned absolute pressure gauge debugging device further includes a debugging tool box, which is disposed inside the cabinet and located next to the absolute pressure gauge fixing base;

[0013] The operating gloves are capable of reaching the debugging toolbox.

[0014] Preferably, the above-mentioned absolute pressure gauge debugging device further includes a pressure control source, which is located inside the cabinet and is used to control the connection between the vacuum generating device and the inside of the cabinet.

[0015] The operating gloves are capable of reaching the pressure control source.

[0016] Preferably, in the above-mentioned absolute pressure gauge debugging device, the pressure control source is electrically connected to the vacuum generating device, or the pressure control source is connected to the vacuum generating device through a gas pipeline equipped with a valve.

[0017] Preferably, in the above-mentioned absolute pressure gauge debugging device, the pressure control source and the debugging tool box can be distributed on both sides of the absolute pressure gauge fixing base;

[0018] Furthermore, each of the pressure control sources and the debugging toolbox corresponds to one of the operating gloves.

[0019] Preferably, in the above-mentioned absolute pressure gauge debugging device, the operating glove is a flexible rubber glove.

[0020] Preferably, in the above-mentioned absolute pressure gauge debugging device, the cabinet includes: a debugging cabinet body and a debugging cabinet door, one side of the debugging cabinet body has a through hole, and the debugging cabinet door is hinged to the debugging cabinet body and can close the debugging cabinet body.

[0021] Preferably, in the above-mentioned pressure gauge adjustment device, the observation window is a transparent glass window.

[0022] Preferably, in the above-mentioned absolute pressure gauge debugging device, the absolute pressure gauge fixing base includes:

[0023] A support base, fixed inside the cabinet, is used to support the absolute pressure gauge to be tested;

[0024] A locking element is detachably connected to the support base, and the locking element is used to lock the absolute pressure gauge to be tested onto the support base.

[0025] This utility model discloses a debugging device for an absolute pressure gauge. The absolute pressure gauge is placed in a well-sealed cabinet structure, and the vacuum degree inside the cabinet is controlled by an external vacuum generator, so that the absolute pressure gauge is always in a vacuum state during the debugging process. This truly simulates the instrument's usage state when measuring atmospheric pressure. Therefore, it can completely ensure the accuracy of the readings at each test calibration point of the absolute pressure gauge, reduce errors, and improve the measurement accuracy of the product. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0027] Figure 1 This is a schematic diagram of the absolute pressure gauge disclosed in an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the debugging device for the absolute pressure gauge disclosed in an embodiment of this utility model;

[0029] 1-Absolute pressure gauge, 101-Lower connector, 102-Diaphragm, 103-Bellbell, 104-Upper connector, 105-Push rod, 106-Casing, 107-Movement, 108-Pointer, 109-Dial scale;

[0030] 301-Commission cabinet body, 302-Commission cabinet door, 303-Observation window, 304-Commission tool box, 305-Operating gloves, 306-Absolute pressure gauge mounting base, 307-Pressure control source, 308-Vacuum generating equipment. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0033] A mechanical absolute pressure gauge (absolute pressure gauge for short) is a mechanical instrument used to monitor or measure the absolute pressure in certain vacuum equipment, such as vacuum packaging machinery and vacuum pumps. It can also measure the condensation pressure and liquid vapor pressure of equipment. Absolute pressure gauges are not affected by atmospheric pressure fluctuations when measuring absolute pressure, and therefore are widely used. Absolute pressure refers to the pressure above absolute pressure zero (absolute vacuum) as a reference.

[0034] Currently, the calibration method for absolute pressure gauges can result in inaccurate atmospheric pressure measurements, especially when calibrating to atmospheric pressure calibration points with lower values, where the error can be significant.

[0035] Based on the above-mentioned technical problems, this application discloses a debugging device for an absolute pressure gauge, which improves the accuracy of the debugging process and reduces measurement errors.

[0036] To facilitate understanding, the structure and measurement principle of the absolute pressure gauge are briefly explained below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, the absolute pressure gauge 1 includes a lower body 101, a diaphragm 102, a bellows 103, an upper body 104, a push rod 105, a housing 106, a movement 107, a pointer 108, and a scale dial 109.

[0038] The lower connector 101 and the upper connector 104 are sealed together and form a accommodating space at the connection between them. A diaphragm 102 is provided in the accommodating space at the connection between the lower connector 101 and the upper connector 104, and the diaphragm 102 divides the accommodating space into a measuring cavity A and a reference cavity B.

[0039] The lower connector 101 has a pressure inlet that communicates with the measuring chamber A. The upper connector 104 is sealed with a bellows 103. One end of the bellows 103 is sealed and fixedly connected to the upper connector 104, and the other end is sealed and connected to the diaphragm 102, so that a closed reference chamber B is formed between the outer side of the bellows 103, the upper connector 104, and the diaphragm 102.

[0040] The upper connector 104 is sealed to the outer shell 106, and the upper connector 104 and the outer shell 106 form a shell cavity C. Specifically, the shell cavity C is formed on the radial inner side of the bellows 103 and in the internal space surrounded by the outer shell 106.

[0041] The lower end of the push rod 105 is welded to the upper middle platform of the diaphragm 102. The upper end of the push rod 105 passes through the inside of the bellows 103 and is connected to the movement 107. A pointer 108 is fixedly connected to the central axis of the movement 107. A scale dial 109 is circumferentially arranged inside the outer casing 106.

[0042] The cap of the pointer 108 is connected to the central pivot of the movement 107, so that the movement 107 can drive the pointer 108 to rotate around the connection point with the central pivot of the movement 107. That is, the pointer 108 can rotate relative to the housing 106 around the center of the housing, and during the rotation of the pointer 108, the tip of the pointer 108 will indicate different scales on the scale dial 109.

[0043] The reference chamber B is sealed by evacuating air to near the absolute pressure zero point (absolute vacuum) using a high-precision vacuum generator (such as a vacuum pump) to serve as a reference for absolute pressure measurement. When the measured medium enters the measuring chamber A through the pressure inlet of the lower connector 101, pressure is generated on the lower side of the diaphragm 102, creating a pressure difference with the reference on the upper side of the diaphragm 102. This pressure difference causes the diaphragm 102 to undergo elastic deformation, which in turn drives the push rod 105 to move up and down. The push rod 105 drives the sector gear on the mechanism 107 to rotate, causing the pointer 108 to deflect and display the corresponding absolute pressure value on the scale dial 109, thereby achieving the purpose of measuring and indicating absolute pressure.

[0044] It should be noted that atmospheric pressure is the pressure exerted by the air in the Earth's atmosphere on the Earth's surface and surrounding objects due to gravity. In other words, atmospheric pressure is relative to absolute vacuum. Therefore, an absolute pressure gauge can directly read the absolute pressure value of the atmosphere (absolute pressure = gauge pressure + atmospheric pressure; when measuring the atmosphere, the gauge pressure is 0, so the absolute pressure equals atmospheric pressure).

[0045] The structure of the absolute pressure gauge 1 has been disclosed above. The debugging device and debugging method of the absolute pressure gauge 1 are explained in conjunction with the structure of the absolute pressure gauge 1.

[0046] like Figure 2 As shown, the debugging device for the absolute pressure gauge 1 in this embodiment includes: a debugging cabinet body 301, a debugging cabinet door 302, an observation window 303, a debugging tool box 304, operating gloves 305, an absolute pressure gauge fixing base 306, a pressure control source 307, and a vacuum generating device 308.

[0047] The main body 301 of the debugging cabinet is a sealed cabinet structure with a sealed connection to the debugging cabinet door 302. The debugging cabinet door 302 can be set at any position on the main body 301 according to different requirements. Optionally, the debugging cabinet door 302 is set at the front of the debugging cabinet main body 301 (the side opposite the operator), and the debugging cabinet door 302 can be a side-opening door structure.

[0048] In some embodiments, the test cabinet door 302 is hinged to the test cabinet body 301. The test cabinet door 302 can open the internal space enclosed by the test cabinet body 301 and the test cabinet door 302, making it convenient to take out and put in the absolute pressure gauge 1 to be tested inside the test cabinet body 301.

[0049] The main body 301 of the debugging cabinet has an observation window 303, which is optionally located at the upper front part of the main body 301. In some embodiments, the observation window 303 is a rectangular window, but it can also be circular, square, etc. The observation window 303 is a transparent glass structure. It can be understood that the front of the main body 301 of the debugging cabinet has a rectangular window, and a transparent glass is sealed to the window to close the rectangular window.

[0050] In some embodiments, the position of the observation window 303 is determined according to the size of the debugging cabinet door 302. If the debugging cabinet door 302 is large, the observation window 303 can be located on the debugging cabinet door 302; if the debugging cabinet door 302 is small, the observation window 303 can be located on the debugging cabinet body 301. The size of the debugging cabinet door 302 in this embodiment can be set according to different needs, and the determination of large and small is not specifically limited.

[0051] Two operating gloves 305 are assembled at the lower part of the debugging cabinet door 302. Optionally, the operating gloves 305 extend from the outside of the debugging cabinet body 301 into the interior of the debugging cabinet body 301. The operating gloves 305 can be installed on the debugging cabinet door 302 or on the debugging cabinet body 301.

[0052] In some embodiments, the operating glove 305 is a flexible rubber glove to facilitate operation by the operator inside the operating glove 305. The operating glove 305 is sealed to the cabinet door 302 or the cabinet body 301.

[0053] The internal space enclosed by the main body 301 of the commissioning cabinet contains an absolute pressure gauge mounting base 306, a commissioning tool box 304, and a pressure control source 307.

[0054] Optionally, the absolute pressure gauge mounting base 306 is positioned in the middle of the space enclosed by the main body 301 of the commissioning cabinet. Two operating gloves 305 are distributed on both sides of the absolute pressure gauge mounting base 306 to facilitate operator operation. The ends of the operating gloves 305 can reach a preset position on the absolute pressure gauge mounting base 306, which can be set according to different needs.

[0055] The debugging tool box 304 and the pressure control source 307 are also distributed on both sides of the absolute pressure gauge mounting base 306. Optionally, along the height direction of the cabinet, the operating gloves 305 are located below the debugging tool box 304 and the pressure control source 307 to shorten the distance from the debugging tool box 304 and the pressure control source 307 to the absolute pressure gauge mounting base 306, which facilitates the operator's operation and improves operating efficiency.

[0056] In this embodiment, the pressure control source 307 is connected to an external vacuum generating device 308 (such as a mechanical vacuum pump, molecular diffusion pump, etc.) via a data cable and a gas pipeline.

[0057] In some embodiments, the absolute pressure gauge mounting base 306 includes a support base (not shown) and a locking element (not shown).

[0058] The support base is fixed inside the cabinet and is used to support the absolute pressure gauge 1 to be tested. Optionally, the absolute pressure gauge can be placed on the support base, which supports the absolute pressure gauge 1. The shape and size of the support base can be set according to different needs and are not specifically limited here.

[0059] The locking element is detachably connected to the support base, and after the locking element is connected to the support base, it can lock the absolute pressure gauge 1 to be tested onto the support base. Optionally, the locking element and the support base can be connected by threads, and after the locking element is connected to the support base, the locking element can limit the absolute pressure gauge 1 to be tested on the support base.

[0060] In this embodiment, the locking component can be a clamp that can be fitted onto the absolute pressure gauge 1 at one end, and a connecting rod that is threadedly connected to the support base at the other end.

[0061] It should be noted that the structure of the absolute pressure gauge fixing base 306 in this embodiment can be set according to different needs. As long as the structure can fix the absolute pressure gauge 1, it is within the protection scope.

[0062] It should be noted that:

[0063] The cabinet, consisting of the main body 301 and the cabinet door 302, is a well-sealed device. The pipes and data cables of the cabinet door 302, observation window 303, operating gloves 305, pressure control source 307, and external vacuum generator 308 on the main body 301 have all been sealed and leak-proof after installation and fixation. When the cabinet body 301 is in a vacuum negative pressure state, it can maintain no sealing leakage inside or outside the cabinet.

[0064] It should be noted that the debugging device for the absolute pressure gauge 1 in this embodiment places the absolute pressure gauge 1 in a well-sealed cabinet structure and uses an external vacuum generator 308 to control the vacuum level inside the cabinet, so that the absolute pressure gauge 1 is always in a vacuum state during the debugging process. This truly simulates the instrument's operating state when measuring atmospheric pressure. Therefore, it can fully guarantee the accuracy of the readings at each calibration point of the absolute pressure gauge 1, reduce errors, and improve the measurement accuracy of the product.

[0065] The structure of the adjustment device for the absolute pressure gauge 1 has been described above. The adjustment method of the adjustment device for the absolute pressure gauge 1 will be described below in conjunction with the structure of the adjustment device for the absolute pressure gauge 1.

[0066] During the commissioning process of absolute pressure gauge 1, which needs to be debugged:

[0067] First, open the test cabinet door 302, install the absolute pressure gauge 1 on the absolute pressure gauge mounting base 306, and ensure that the absolute pressure gauge 1 is secure and not loose or falling off; then open the outer casing 106 of the absolute pressure gauge 1 to expose the inside of the outer casing 106 for testing; close the test cabinet door 302 and lock it to keep the inside of the cabinet consisting of the test cabinet body 301 and the test cabinet door 302 sealed.

[0068] Then, turn on the vacuum generator 308 so that the vacuum negative pressure generated by the vacuum generator 308 can be connected to the pressure control source 307. The commissioning personnel put their arms into the operating gloves 305 and adjust the position of their arms inside the operating gloves 305 to ensure that their arms and fingers can move freely.

[0069] Next, turn on the pressure control source 307. The mechanical buttons or industrial touch screen selection keys on the pressure control source 307 can be used to control the on / off and magnitude of the vacuum negative pressure inside the main body 301 of the debugging cabinet. Since the absolute pressure gauge 1 is in a sealed measurement environment, this ensures that the measuring chamber A and the shell chamber C of the absolute pressure gauge 1 can simultaneously change the vacuum negative pressure, realistically simulating the instrument's operating state when measuring atmospheric pressure. The debugging personnel then pick up the debugging tools from the debugging tool box 304 with their hands wearing operating gloves 305, and observe and debug the absolute pressure gauge 1 inside the main body 301 of the debugging cabinet through the observation window 303.

[0070] After debugging, turn off the pressure control source 307 and release the vacuum negative pressure of the cabinet. Put the debugging tools back into the debugging tool box 304, install the absolute pressure gauge 1, remove your hands from the operating gloves 305, open the debugging cabinet door 302, remove the debugged absolute pressure gauge 1 from the absolute pressure gauge fixing seat 306 and take it out of the cabinet. Close the debugging cabinet door 302, and then turn off the external vacuum generating equipment 308. This completes the debugging process of the absolute pressure gauge 1.

[0071] It should be noted that the debugging device for the absolute pressure gauge 1 in this embodiment can ensure that the measuring chamber A and the housing chamber C of the absolute pressure gauge 1 can simultaneously change the vacuum negative pressure during the debugging process. This truly simulates the instrument's operating state when the absolute pressure gauge 1 is measuring atmospheric pressure. Therefore, it can fully guarantee the accuracy of the readings at each detection calibration point of the absolute pressure gauge 1, reduce errors, and improve the measurement accuracy of the product.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0073] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for commissioning a pressure gauge, characterized in that include: The cabinet is an openable and closable sealed structure, and the cabinet has a transparent observation window (303). Operating gloves (305) are sealed to the cabinet body and extend into the interior of the cabinet body; Absolute pressure gauge fixing base (306), the absolute pressure gauge fixing base (306) is set inside the cabinet and is used to fix the absolute pressure gauge (1) to be debugged, and the operating glove (305) can reach the absolute pressure gauge fixing base (306). A vacuum generating device (308) is sealed to the cabinet and is capable of evacuating the inside of the cabinet.

2. The device for adjusting an absolute pressure gauge according to claim 1, characterized in that, Two operating gloves (305) are provided and are distributed on both sides of the absolute pressure gauge mounting base (306).

3. The device for adjusting an absolute pressure gauge according to claim 1, characterized in that, It also includes a debugging tool box (304), which is located inside the cabinet and is situated beside the absolute pressure gauge mounting base (306); The operating glove (305) is capable of reaching the debugging toolbox (304).

4. The device for adjusting an absolute pressure gauge according to claim 3, characterized in that, It also includes a pressure control source (307), which is disposed inside the cabinet and is used to control the connection and disconnection between the vacuum generating device (308) and the cabinet. The operating glove (305) is capable of reaching the pressure control source (307).

5. The device for adjusting an absolute pressure gauge according to claim 4, characterized in that, The pressure control source (307) is electrically connected to the vacuum generating device (308). Alternatively, the pressure control source (307) and the vacuum generating device (308) may be connected via a gas pipeline equipped with valves.

6. The device for adjusting an absolute pressure gauge according to claim 4, characterized in that, The pressure control source (307) and the debugging tool box (304) can be distributed on both sides of the absolute pressure gauge mounting base (306); Furthermore, the pressure control source (307) and the debugging tool box (304) each correspond to one of the operating gloves (305).

7. The device for adjusting an absolute pressure gauge according to any one of claims 1 to 6, characterized in that, The operating gloves (305) are flexible rubber gloves.

8. A commissioning device for a pressure gauge according to any one of claims 1 to 6, characterized in that The cabinet includes a debugging cabinet body (301) and a debugging cabinet door (302). One side of the debugging cabinet body (301) has a through hole. The debugging cabinet door (302) is hinged to the debugging cabinet body (301) and can close the debugging cabinet body (301).

9. The device for adjusting an absolute pressure gauge according to any one of claims 1 to 6, characterized in that, The observation window (303) is a transparent glass window.

10. The device for adjusting an absolute pressure gauge according to any one of claims 1 to 6, characterized in that, The absolute pressure gauge mounting base (306) includes: Support base, the support base is fixed inside the cabinet, the support base is used to support the absolute pressure gauge (1) to be tested. A locking member is detachably connected to the support base, and the locking member is used to lock the absolute pressure gauge (1) to be tested onto the support base.

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