Pressure gauge calibrating device

Abstract

The utility model relates to a pressure gauge calibrating device. The pressure gauge calibrating device comprises a main body seat; a calibration meter is arranged on the main body seat; the number of the installation mechanisms is at least two, and the at least two installation mechanisms are arranged on the main body seat and used for installing a meter to be detected; the air inlet mechanism is arranged on the main body seat and is used for connecting all the mounting mechanisms and all the calibration meters on the main body seat and inflating the to-be-calibrated meters on all the mounting mechanisms and the calibration meters; and the exhaust mechanism is arranged on the main body seat and is used for controlling the to-be-detected meter to exhaust and detect. According to the utility model, when the calibrating device is used, one or more general pressure gauges can be conveniently mounted and calibrated through the mounting mechanism, time and labor are saved, and the calibrating efficiency of the general pressure gauges is improved to a certain extent.

Description

Technical Field

[0001] The present application relates to the technical field of calibration devices, and in particular to a pressure gauge calibration device. Background Art

[0002] A pressure gauge is a measuring device used to calibrate the pressure of liquid or gas. Its main structure includes an elastic element and a pointer. When the pressure of the measured medium acts on the elastic element, the elastic element deforms, causing the pointer to point to the corresponding scale, thereby presenting the pressure value. In order to ensure the accuracy of the pressure gauge, a pressure gauge calibration device was born.

[0003] During the use of common pressure gauge calibration devices, the pressure gauge needs to be inflated with an air cylinder. The calibration can only be performed after the pressure gauge displays the pressure value. When calibrating different numbers of pressure gauges, it is usually necessary to use sealing blocks to seal the redundant calibration ports to prevent gas leakage from affecting the calibration results. However, when frequently calibrating different numbers of pressure gauges, it is necessary to frequently install and remove sealing blocks, which is time-consuming and labor-intensive, and can easily lead to the loss of sealing blocks, thereby reducing the calibration efficiency to a certain extent.

[0004] Therefore, there is an urgent need to provide a pressure gauge calibration device to solve the above-mentioned technical problems. Utility Model Content

[0005] Based on this, a pressure gauge calibration device is provided to improve the calibration efficiency in the general pressure gauge calibration process.

[0006] On the one hand, a pressure gauge calibration device is provided, comprising: a main body seat; a calibration gauge is arranged on the main body seat; at least two mounting mechanisms are provided, and at least two mounting mechanisms are provided on the main body seat, for mounting the gauge to be tested; an air intake mechanism is provided on the main body seat, for connecting all the mounting mechanisms and the calibration gauge located on the main body seat, and for inflating the gauge to be tested and the calibration gauge on each mounting mechanism; an exhaust mechanism is provided on the main body seat, for controlling the exhaust calibration of the gauge to be tested.

[0007] An optional solution is: the mounting mechanism includes a mounting portion and a valve core portion located in the mounting portion; the mounting portion is used for detachable installation of the meter to be tested; the valve core portion is used to connect or disconnect the passage between the air intake mechanism and the meter to be tested under the action of external force.

[0008] An optional solution is: the mounting portion includes a fixed cylinder, the fixed cylinder is arranged on the main seat, and the fixed cylinder is provided with a first air hole, the first air hole is connected to the air intake mechanism; the air intake end of the meter to be inspected is arranged in the fixed cylinder.

[0009] An optional solution is: the mounting portion further includes a rotating cylinder, the rotating cylinder and the fixed cylinder are coaxially arranged and interconnected; the rotating cylinder is rotatably connected to the fixed cylinder; the air inlet end of the meter to be inspected is threadedly connected to the interior of the rotating cylinder.

[0010] An optional solution is: the valve core part is arranged in the fixed cylinder, and includes an upper valve plate, a valve core, a lower valve plate and an elastic member; a second air hole is provided on the upper valve plate, a third air hole is provided on the lower valve plate, and the elastic member is connected between the lower valve plate and the bottom of the fixed cylinder; the valve core is arranged between the upper valve plate and the lower valve plate; a push rod for pushing the valve core to open is connected to the upper valve plate; when in use, the air inlet end of the meter to be inspected presses down the upper valve plate to control the push rod to push the valve core to open; when not in use, the elastic member pushes up the lower valve plate to control the valve core to close.

[0011] An optional solution is: the valve core includes two semicircular door panels that are hinged to each other; the semicircular door panels can be folded downward around the hinge point in the fixed cylinder; the upper end of the push rod is connected to the upper valve plate, and the lower end of the push rod abuts against the position of the semicircular door panels away from the hinge point.

[0012] An optional solution is that a sealing gasket is provided on the outer edge of the semicircular door panel.

[0013] An optional solution is: the air intake mechanism includes an air cylinder and an air intake pipe; the inlet of the air intake pipe is connected to the air cylinder and is provided with a one-way valve, and the outlet of the air intake pipe is connected to the atmosphere; a plurality of branch pipes are provided on the air intake pipe, and a plurality of the branch pipes correspond to a plurality of the installation mechanisms and the calibration table, and the branch pipes connect the installation mechanisms and the calibration table.

[0014] An optional solution is: the exhaust mechanism includes an outer shell and a baffle, the air intake pipe is passed through the outer shell and is cut off at a position inside the outer shell; a fourth air hole is provided on the baffle, and the baffle can be plugged up and down in the outer shell at the position where the air intake pipe is cut off to achieve the exhaust or air blocking function of the air intake pipe.

[0015] An optional solution is: the exhaust mechanism also includes a connecting block and a spring telescopic rod, the connecting block is connected to the side of the baffle, and the spring telescopic rod is connected to the connecting block and the shell for automatically resetting the baffle.

[0016] Beneficial effects:

[0017] The above-mentioned pressure gauge calibration device is provided with at least two or more mounting mechanisms on the main body seat at the same time, and a corresponding gauge to be tested is installed on each mounting mechanism. The air intake mechanism can inflate the gauges to be tested on all the mounting mechanisms on the main body seat, and then multiple gauges to be tested can be calibrated at one time, which saves trouble and labor and can improve the calibration efficiency in the general pressure gauge calibration process. In addition, an exhaust mechanism is provided, which can perform exhaust calibration on the gauges to be tested and then complete a calibration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a pressure gauge calibration device in one embodiment Figure 1 ;

[0019] Figure 2 A schematic diagram of the structure of a pressure gauge calibration device in one embodiment Figure 2 ;

[0020] Figure 3 is a cross-sectional schematic diagram of a blocking mechanism in one embodiment;

[0021] Figure 4 A cross-sectional schematic diagram of a pressure gauge calibration device in one embodiment;

[0022] Figure 5 for Figure 4 Enlarged view of part A in .

[0023] Figure numerals: 1. main body seat; 11. calibration table; 2. installation mechanism; 21. installation part; 211. fixed cylinder; 2111. first air hole; 212. rotating cylinder; 22. valve core part; 221. upper valve plate; 2211. second air hole; 222. valve core; 2221. semicircular door plate; 2222. sealing gasket; 223. lower valve plate; 2231. third air hole; 22. elastic part; 3. table to be inspected; 4. air intake mechanism; 41. air cylinder; 42. air intake pipeline; 43. one-way valve; 5. exhaust mechanism; 51. outer shell; 52. baffle; 521. fourth air hole; 53. connecting block; 54. spring telescopic rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present application in a schematic manner, and therefore the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0027] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] The embodiment of the present application provides a pressure gauge calibration device, which can improve the calibration efficiency in the general pressure gauge calibration process.

[0029] The following is a detailed description of a pressure gauge calibration device provided in this embodiment. Figure 1 , Figure 2 As shown, it includes: a main body seat 1, a mounting mechanism 2, an air intake mechanism 4 and an exhaust mechanism 5. The main body seat 1 is set in a rectangular shape, and a calibration meter 11 is set on the main body seat 1; the mounting mechanism 2 is set in at least two, and at least two mounting mechanisms 2 are set on the main body seat 1, and the mounting mechanism 2 is used to install the meter to be tested 3; the air intake mechanism 4 is set on the main body seat 1, and is used to connect all the mounting mechanisms 2 and the calibration meter 11 located on the main body seat 1, and to inflate the meter to be tested 3 and the calibration meter 11 on each mounting mechanism 2; the exhaust mechanism 5 is set on the main body seat 1, and is used to control the exhaust calibration of the meter to be tested 3.

[0030] In this embodiment, at least two or more mounting mechanisms 2 are arranged on the main seat 1 at the same time, and each mounting mechanism 2 is correspondingly installed with a meter to be tested 3. The meter to be tested 3 on all the mounting mechanisms 2 on the main seat 1 and the calibration meter 11 can be inflated through the air intake mechanism 4, and then multiple meters to be tested 3 can be calibrated at one time, which saves trouble and labor and can improve the calibration efficiency in the calibration process of general pressure gauges. Through the use of the calibration meter 11, the calibration meter 11 can be used as a reference when the meter to be tested 3 is inflated and calibrated, so as to determine the normal condition of the meter to be tested 3, and an exhaust mechanism 5 is also provided. After the calibration is completed, the meter to be tested 3 can be vented and calibrated, thereby completing a calibration process.

[0031] Please refer to Figure 2 , Figure 3 As shown, in this embodiment, it should be noted that the mounting mechanism 2 includes a mounting portion 21 and a valve core portion 22. The mounting portion 21 is arranged on the main seat 1. The meter 3 to be inspected can be conveniently installed or disassembled. When the meter 3 to be inspected needs to be inspected, it is only necessary to install the air inlet end of the meter 3 to be inspected on the mounting portion 21. The valve core portion 22 is arranged inside the mounting portion 21. The valve core portion 22 is used to connect or disconnect the passage between the air inlet mechanism 4 and the meter 3 to be inspected under the action of external force. Through the setting of the valve core portion 22, the connection or closing of the air inlet mechanism 4 and the meter 3 to be inspected can be controlled. Therefore, when inspecting a single meter 3 to be inspected, the valve core portion 22 on which the meter 3 to be inspected is installed on the mounting mechanism 2 can be selected to be opened, and then the air inlet mechanism 4 inflates the meter 3 to be inspected. For other mounting mechanisms 2 without the inspection meter 11, the valve core portion 22 is used to block the gas to prevent the gas from being discharged. Therefore, it is convenient to inspect multiple and single meters 3 to be inspected, saving time and effort, and improving the inspection efficiency to a certain extent.

[0032] Please continue to refer to Figure 2 , Figure 3 As shown, in an achievable manner, the mounting portion 21 includes a fixed cylinder 211 and a rotating cylinder 212. The bottom of the fixed cylinder 211 is closed and a first air hole 2111 is provided at the middle position. The first air hole 2111 is used to connect with the air intake mechanism 4. The lower end of the fixed cylinder 211 is mounted on the main body 1. The rotating cylinder 212 is rotatably connected to the upper end of the fixed cylinder 211, and the interiors of the two are mutually connected. The rotating cylinder 212 and the fixed cylinder 211 are coaxially arranged. The inner circumferential wall of the rotating cylinder 212 is provided with an internal thread, and the air intake end of the meter to be inspected 3 is threadedly connected to the rotating cylinder 212. The air intake end of the meter to be inspected 3 is threadedly connected to the rotating cylinder 212, so that the installation and disassembly operations of the meter to be inspected 3 are conveniently realized. At the same time, the rotating cylinder 212 can be rotatably arranged relative to the fixed cylinder 211. By rotating the rotating cylinder 212, the position of the meter to be inspected 3 can be adjusted, so that the inspection operation of the meter to be inspected 3 is convenient.

[0033] It should also be noted that the valve core portion 22 is arranged in the fixed cylinder 211, and includes an upper valve plate 221, a valve core 222, a lower valve plate 223 and an elastic member 224; the upper valve plate 221 and the lower valve plate 223 can be slidably arranged up and down in the fixed cylinder 211, and the outer peripheries of the upper valve plate 221 and the lower valve plate 223 are attached to the inner periphery of the fixed cylinder 211, the upper valve plate 221 is provided with a second air hole 2211, the lower valve plate 223 is provided with a third air hole 2231, the valve core 222 is arranged between the upper valve plate 221 and the lower valve plate 223, and the valve 2 When the valve core 222 is in the open state, the gas from the air intake mechanism 4 can enter from the first air hole 2111 at the bottom of the fixed cylinder 211, and enter into the meter to be inspected 3 through the third air hole 2231 of the lower valve plate 223 and the second air hole 2211 of the upper valve plate 221, so as to facilitate the subsequent inspection of the meter to be inspected 3; when the valve core 222 is in the closed state, the second air hole 2211 and the third air hole 2231 are separated by the valve core 222, and then the gas from the air intake mechanism 4 cannot pass through the valve core 222, and then cannot be discharged from the blocking mechanism 2.

[0034] The elastic member 224 is connected between the lower valve plate 223 and the bottom of the fixed cylinder 211. When the elastic member 224 is in a natural state, the valve core 222 is in a closed state. When the elastic member 224 is in a compressed state, the valve core 222 is in an open state. Preferably, the elastic member 224 is configured as a spring. Therefore, when in use, the air inlet end of the meter to be inspected 3 is threadedly connected to the rotating cylinder 212, and at the same time, the air inlet end of the meter to be inspected 3 squeezes the upper valve plate 221 in the fixed cylinder 211 to control the valve core 222 to open, and the elastic member 224 is compressed, at which time the first air hole 2111, the second air hole 2211 and the third air hole 2231 are interconnected; when not in use, the upper valve plate 221 has no external force, and at this time the elastic member 224 restores its elasticity to push the lower valve plate 223 to control the valve core 222 to close, and at this time the second air hole 2211 and the third air hole 2231 are separated.

[0035] In one example, the valve core 222 includes two semicircular door panels 2221, the straight sides of the two semicircular door panels 2221 are hinged to each other and rotate in the fixed cylinder 211, and the curved sides of the semicircular door panels 2221 can be folded downward in the fixed cylinder 211 around the hinge point; in other words, when the two semicircular door panels 2221 are in a flat unfolded state, they can just close the fixed cylinder 211, and when the two semicircular door panels 2221 are folded downward, that is, the curved sides of the semicircular door panels 2221 no longer fit the inner wall of the fixed cylinder 211, and a gap is formed between the two. At this time, the gas at the lower end of the fixed cylinder 211 can enter the upper end of the fixed cylinder 211 through the gap.

[0036] In the case of adopting the above-mentioned valve core 222, the lower surface of the upper valve plate 221 is also connected to two push rods 2212, and the two push rods 2212 and the two semicircular door plates 2221 are arranged in a one-to-one correspondence. The upper end of the push rod 2212 is connected to the upper valve plate 221, and the lower end of the push rod 2212 abuts against the position of the semicircular door plate 2221 away from the hinge point. As a result, the upper valve plate 221 slides downward under the extrusion force of the air inlet end of the test meter 3, and the push rod 2212 will squeeze the semicircular door plate 2221, so that the semicircular door plate 2221 folds downward around the hinge point, and then opens the fixed cylinder 211. At the same time, the arc end of the semicircular door plate 2221 will abut against the lower valve plate 223, so that the lower valve plate 223 slides downward to squeeze the elastic member 224. At this time, the gas enters through the first air hole 2111, the third air hole 2231, and the second air hole 2211. When the check meter 3 is not in use, that is, when the check meter 3 is not installed, the elastic member 224 will restore its elasticity, and the elastic member 224 will push the lower valve plate 223 upward, so that the lower valve plate 223 slides upward. During the upward sliding process, the lower valve plate 223 will hold the two semicircular door plates 2221 to reset until the two semicircular door plates 2221 are in the same plane, and the fixed cylinder 211 is closed at this time. The elastic member 224 is set to automatically reset the lower valve plate 223.

[0037] Preferably, the outer edge of the semicircular door plate 2221 is provided with a sealing gasket 2222. The provision of the sealing gasket 2222 can increase the sealing performance and prevent gas leakage. The gauge to be inspected 3 is a general mechanical pressure gauge to be inspected, and the sealing gasket 2222 can improve the sealing effect of the semicircular door plate 2221.

[0038] Please refer to Figure 1 , Figure 2 as well as Figure 4 As shown, in this embodiment, it is also necessary to explain that the air intake mechanism 4 includes an air cylinder 41 and an air intake pipeline 42. The air cylinder 41 is arranged on the main body seat 1. The air cylinder 41 belongs to the prior art and will not be described in detail in this embodiment. The air intake pipeline 42 is arranged inside the main body seat 1 and is located at the lower end of the blocking mechanism 2. One end of the air intake pipeline 42 is connected to the air cylinder 41 and a one-way valve 43 is arranged at this position. Through the use of the one-way valve 43, the gas inside the air intake pipeline 42 can move in one direction. The other end of the air intake pipeline 42 extends out of the main body seat 1 and is connected to the atmosphere. Several branch pipelines are arranged on the air intake pipeline 42, and the several branch pipelines correspond to several installation mechanisms 2 and the calibration table 11. The branch pipelines are connected to the lower end of the fixed cylinder 211 in the installation mechanism 2 and the calibration table 11, and then the branch pipelines are used to perform the inflation operation for each fixed cylinder 211 separately, thereby realizing the calibration operation of a single or multiple meters 3 to be inspected.

[0039] Please refer to Figure 2, Figure 4 as well as Figure 5 As shown, in this embodiment, it is also necessary to explain that the exhaust mechanism 5 includes a shell 51 and a baffle 52. The shell 51 is installed inside the main seat 1. The air intake pipe 42 is passed through the shell 51, and the part of the air intake pipe 42 located inside the shell 51 is cut off. The baffle 52 is provided with a fourth air hole 521. The baffle 52 can be plugged up and down in the shell 51 at the position where the air intake pipe 42 is cut off to achieve the exhaust or gas blocking function of the air intake pipe 42. When gas blocking is required, the baffle 52 is pushed upward to displace the fourth air hole 521 on the baffle 52 with the position where the air intake pipe 42 is cut off, and then the gas is blocked; when gas is required, the baffle 52 is inserted downward to align the fourth air hole 521 on the baffle 52 with the position where the air intake pipe 42 is cut off, and then the gas can be discharged smoothly.

[0040] In an achievable manner, the exhaust mechanism 5 further includes a connecting block 53 and a spring telescopic rod 54. The connecting block 53 is disposed in the housing 51 and connected to the side of the baffle 52. The spring telescopic rod 54 is connected to the connecting block 53 and the housing 51, and is used to reset the baffle 52. By pressing the baffle 52, the fourth air hole 521 on the baffle 52 is connected to the air inlet pipeline 42, and then the internal gas of the meter to be inspected 3 enters the air inlet pipeline 42, and then is discharged through the air inlet pipeline 42 and the fourth air hole 521. Then, the force acting on the baffle 52 is removed, and at this time, the spring telescopic rod 54 recovers its elasticity, and then drives the baffle 52 to reset, thereby conveniently controlling the exhaust or air blocking function of the air inlet pipeline 42.

[0041] The implementation principle of this embodiment is as follows: when using the device, the air inlet end of the meter to be tested 3 is connected by threading into the rotating cylinder 212, and at the same time, the air inlet end of the meter to be tested 3 presses the upper valve plate 221 in the fixed cylinder 211, and then the two semicircular door plates 2221 are pushed downward and folded open by the push rod 2212. When the meter to be tested 3 is tested, the air inlet pipeline 42 is inflated by the air cylinder 41, and the gas passes through the first air hole 2111 at the bottom of the fixed cylinder 211. , the third air hole 2231 and the second air hole 2211 enter the interior of the meter to be tested 3, thereby realizing inflation calibration; when the meter to be tested 3 needs to be exhausted for calibration, the baffle 52 is manually pressed to make the fourth air hole 521 on the baffle 52 communicate with the air inlet pipe 42, and then the gas inside the meter to be tested 3 enters the interior of the air inlet pipe 42, and then is discharged through the air inlet pipe 42 and the fourth air hole 521. Finally, the external force is removed and the baffle 52 is reset by the spring telescopic rod 54.

[0042] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A pressure gauge calibration device, characterized in that: include: A main body seat (1); a calibration table (11) is arranged on the main body seat (1); The number of mounting mechanisms (2) is at least two, and at least two mounting mechanisms (2) are arranged on the main base (1) to mount the meter to be inspected (3); An air intake mechanism (4) is arranged on the main body seat (1) and is used to connect all the mounting mechanisms (2) and the calibration tables (11) located on the main body seat (1) and to inflate the table to be inspected (3) and the calibration table (11) on each mounting mechanism (2); An exhaust mechanism (5) is arranged on the main body seat (1) and is used to control the exhaust inspection of the meter to be inspected (3); The mounting mechanism (2) comprises a mounting portion (21) and a valve core portion (22) located in the mounting portion (21); The mounting portion (21) is used for detachably mounting the meter to be inspected (3), and the mounting portion (21) comprises a fixed cylinder (211), the fixed cylinder (211) is arranged on the main body seat (1), and the fixed cylinder (211) is provided with a first air hole (2111), and the first air hole (2111) is connected to the air intake mechanism (4); the air intake end of the meter to be inspected (3) is arranged in the fixed cylinder (211); The mounting portion (21) further comprises a rotating cylinder (212), wherein the rotating cylinder (212) and the fixed cylinder (211) are coaxially arranged and communicate with each other; The rotating cylinder (212) is rotatably connected to the fixed cylinder (211); The air inlet end of the meter to be inspected (3) is threadedly connected to the interior of the rotating cylinder (212); The valve core part (22) is used to connect or disconnect the passage between the air intake mechanism (4) and the meter to be tested (3) under the action of external force.

2. The pressure gauge calibration device according to claim 1, characterized in that: The valve core part (22) is arranged in the fixed cylinder (211), and comprises an upper valve plate (221), a valve core (222), a lower valve plate (223) and an elastic member (224); The upper valve plate (221) is provided with a second air hole (2211), the lower valve plate (223) is provided with a third air hole (2231), and the elastic member (224) is connected between the lower valve plate (223) and the bottom of the fixed cylinder (211); The valve core (222) is arranged between the upper valve plate (221) and the lower valve plate (223); The upper valve plate (221) is connected to a push rod (2212) for pushing the valve core (222) to open; When in use, the air inlet end of the meter to be inspected (3) presses down the upper valve plate (221) to control the push rod (2212) to push the valve core (222) to open; When not in use, the elastic member (224) pushes up against the lower valve plate (223) to control the valve core (222) to close.

3. The pressure gauge calibration device according to claim 2, characterized in that: The valve core (222) comprises two semicircular door plates (2221) which are hingedly arranged relative to each other; The semicircular door panel (2221) can be folded downwards around the hinge point inside the fixed cylinder (211); The upper end of the push rod (2212) is connected to the upper valve plate (221), and the lower end of the push rod (2212) abuts against a position of the semicircular door plate (2221) away from the hinge point.

4. The pressure gauge calibration device according to claim 3, characterized in that: A sealing gasket (2222) is provided on the outer edge of the semicircular door panel (2221).

5. The pressure gauge calibration device according to claim 1, characterized in that: The air intake mechanism (4) comprises an air cylinder (41) and an air intake pipeline (42); The inlet of the air intake pipeline (42) is connected to the air cylinder (41) and is provided with a one-way valve (43), and the outlet of the air intake pipeline (42) is connected to the atmosphere; The air intake pipeline (42) is provided with a plurality of branch pipelines, the plurality of branch pipelines corresponding to a plurality of the installation mechanisms (2) and the calibration table (11), and the branch pipelines connect the installation mechanisms (2) and the calibration table (11).

6. The pressure gauge calibration device according to claim 5, characterized in that: The exhaust mechanism (5) comprises a shell (51) and a baffle (52); the air intake pipeline (42) is passed through the shell (51) and is cut off at a position inside the shell (51); The baffle plate (52) is provided with a fourth air hole (521), and the baffle plate (52) can be inserted up and down into the housing (51) at a position where the air intake pipeline (42) is cut off, so as to realize the exhaust or air blocking function of the air intake pipeline (42).

7. The pressure gauge calibration device according to claim 6, characterized in that: The exhaust mechanism (5) further comprises a connecting block (53) and a spring telescopic rod (54), wherein the connecting block (53) is connected to the side of the baffle (52), and the spring telescopic rod (54) is connected to the connecting block (53) and the housing (51) for automatically resetting the baffle (52).

Images