Portable breather valve checking device

Abstract

The utility model relates to the technical field of breather valve verification equipment, and discloses a portable breather valve verification device, which comprises a lower box block and an upper box block, hinges are fixedly connected to the left side and the right side of the bottom of the outer wall of the upper box block, and the bottom of the upper box block is rotatably connected with the lower box block through the bottoms of the hinges. Rotating blocks are rotationally connected to the left side and the right side of the front portion of the outer wall of the lower box block, arc-shaped columns are rotationally connected to the tops of the outer walls of the rotating blocks, hooks are fixedly connected to the left side and the right side of the top of the upper box block, and rotating supporting strips are rotationally connected to the left end and the right end of the front side of the bottom of the inner wall of the lower box block; the top end of the rotating supporting strip is rotationally connected with a U-shaped sliding block. According to the utility model, the spherical handle is pushed to rotate the rotating support strip, so that the lifting operation table is lifted, and after the required height is reached, the spherical handle is loosened to clamp the clamping block with the clamping groove, so that the position of the lifting operation table is fixed, and breather valves with different specifications can be checked conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of breathing valve calibration equipment, especially to a portable breathing valve calibration device. BACKGROUND

[0002] As a key component for safe operation of storage tank equipment, breathing valve needs to be calibrated regularly to ensure that its pressure control and sealing meet the standards. Traditional breathing valve calibration devices are mostly bulky, complex in structure, inconvenient to carry and transport, and difficult to meet the demand for rapid detection on site. Although some devices are portable, the operation process is complicated, height adjustment is difficult, they cannot adapt to different specifications of breathing valves, and the sealing connection structure is prone to air leakage, resulting in large deviation of calibration results. In addition, the existing devices have low functional integration and lack protection design, which are easily affected by environmental factors when used outdoors, affecting the stability and service life of the equipment. Therefore, it is urgent to design a more efficient, reliable and adaptable portable breathing valve calibration device.

[0003] After searching, the Chinese patent publication No. CN219474951U discloses a portable breathing valve calibration device, which comprises a workbench for fixing the breathing valve and a calibration device. The workbench includes a clamping seat and a quick clamping device. The calibration device includes a gas extraction and inflation pump, a breathing valve pressure gauge and a solenoid valve. The gas extraction and inflation pump is connected with a gas storage tank through the solenoid valve, and the gas storage tank is connected with the breathing valve through a pipeline. The utility model has the advantages of small size, light weight and convenient carrying. The installation of the breathing valve is simple, and the handle of the quick clamping device can be easily moved to complete the clamping of the breathing valve on the test bench. The system pressure is detected by a pressure sensor, and the gas flow in the breathing valve test pipeline is controlled. However, in actual use, due to the different sizes of the breathing valve, the device needs to be supported to a certain height during calibration, which makes the device unable to adjust its detection height according to the needs, and thus cannot adapt to different use scenarios and operation requirements. UTILITY MODEL CONTENTS

[0004] In order to make up for the above shortcomings, the utility model provides a portable breathing valve calibration device, which aims to improve the problem that the existing technology cannot adjust to the appropriate height according to the actual needs, and cannot fully utilize the internal space, so that the device can adapt to different use scenarios and operation requirements.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: a portable breathing valve calibration device, including lower box block and upper box block, the outer wall bottom left and right sides of upper box block are all fixedly connected with hinge, the bottom of upper box block is rotatably connected with lower box block through the bottom of hinge, the outer wall front left and right sides of lower box block are all rotatably connected with rotating block, the outer wall top of rotating block is rotatably connected with arc column, the top left and right sides of upper box block are all fixedly connected with hook, the inner wall bottom left and right ends of lower box block are all rotatably connected with rotating branch, the top of rotating branch is rotatably connected with U-shaped sliding block, the top of U-shaped sliding block is slidably connected with clamping block, the outer wall of two clamping blocks is slidably connected with lifting operation platform, the top of lifting operation platform is fixedly connected with spherical handle, the top front side of lifting operation platform is provided with a plurality of clamping grooves, the outer wall of clamping block is matched with the inner wall of clamping groove, and the bottom left and right sides of lifting operation platform are all provided with support mechanism.

[0006] Through the above technical scheme: first rotating the rotating block of lower box block outer wall front, makes it drive arc column to rotate and rise, thereby with the hook of upper box block top unhooking, then rotating upper box block, makes it open through the hinge around lower box block, exposes internal detection equipment, then, the upper box block is stably supported in the open state, then, the spherical handle of both sides is pushed, so that the rotating branch rotates under the push, and then the lifting operation platform is lifted, after reaching the required height, the holding of the spherical handle is released, under the action of gravity, it will move to the bottom, and then the clamping block is matched with the clamping groove above the lifting operation platform, the position of the lifting operation platform is fixed, so that different specifications of breathing valve can be calibrated according to the required scene.

[0007] As a further description of the above technical scheme:

[0008] The support mechanism includes two fixed recesses, the top of the two fixed recesses is fixedly connected to the bottom left and right sides of the lifting operation platform respectively, the inner wall of the fixed recess is slidably connected with a spherical block, the bottom end of the spherical block is fixedly connected with a hollow column, the inner wall of the hollow column is slidably connected with a sliding rod, the outer wall bottom end of the hollow column is threadedly connected with a fixed screw, and the bottom end of the sliding rod is rotatably connected with a support disc.

[0009] Through the above technical scheme: when the lifting operation platform is lifted to a height higher than the lower box block, the support mechanism on both sides of the bottom of the lifting operation platform can be turned out at this time, and after being fixed at a height, the fixed screw is rotated to release the extrusion and fixation of the fixed screw and the sliding rod, then the sliding rod is pulled out of the hollow column, until the support disc can be supported above the plane, at this time, the fixed screw is rotated again, so that the sliding rod is extruded and fixed again, and then the support of both sides of the lifting operation platform is completed, avoiding the influence of device shaking on calibration accuracy.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the triangular protective block is fixedly connected with a buffer block.

[0012] Through the above technical solution: the triangular protective block can disperse the impact force to different directions by utilizing the stable geometric structure characteristics of the triangle, avoiding the damage of the box due to local excessive stress, and the buffer block can absorb and buffer the impact force by utilizing the elastic deformation of itself, providing reliable physical protection for the whole device.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the lower box block is rotatably connected with a U-shaped strip at the middle of the front side, and the outer wall of the U-shaped strip is fixedly connected with a silica gel sleeve.

[0015] Through the above technical solution: the U-shaped strip can be used as a hand handle when it needs to be moved by rotating and unfolding, and the silica gel sleeve can provide a comfortable grip for the user, avoiding hand discomfort caused by long-term carrying, and effectively preventing the device from slipping out of the hand during carrying, improving the safety and convenience during use.

[0016] As a further description of the above technical solution:

[0017] The inner wall of the lower box block is fixedly connected with a fixing ring at the bottom of the rear side, and the inner wall of the two fixing rings is fixedly connected with a gas cylinder.

[0018] Through the above technical solution: the fixing ring can firmly fix the gas cylinder inside the lower box block, preventing the gas cylinder from shaking, shifting or even falling off in the device, ensuring the installation stability of the gas cylinder, and the gas cylinder can continuously and stably output gas, providing reliable pressure guarantee for the breathing valve calibration, and further ensuring the accuracy and efficiency of the calibration work.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the upper box block is provided with a plurality of grooves at the front side, and the inner wall of the upper box block is fixedly connected with a plurality of elastic arc-shaped strips.

[0021] Through the technical scheme, the groove can provide a special space for storing small calibration tools, spare parts or spare consumables, facilitating the user to classify and store and quickly take, the elastic arc-shaped strip can clamp and fix the placed objects through the elastic force of the elastic arc-shaped strip, preventing displacement of the placed objects during device carrying or shaking, further improving the stability and safety of storage, and also playing a certain buffering protection role on the placed objects.

[0022] As a further description of the technical scheme:

[0023] The top end of the lower box block is fixedly connected with an annular block, and the front side of the upper box block is provided with a clamping groove.

[0024] Through the technical scheme, the annular block can be accurately embedded in the clamping groove, and the stable connection of the upper box block and the lower box block is realized through the clamping effect between the two, effectively preventing accidental opening of the box body during transportation or use, and protecting the safety of the internal calibration device.

[0025] As a further description of the technical scheme:

[0026] The top end of the lifting operation platform is fixedly connected with a display screen, the top left and right sides of the lifting operation platform are fixedly connected with detection tables, and the top front side of the lifting operation platform is fixedly connected with a plurality of measuring air nozzles.

[0027] Through the technical scheme, the display screen can display the key data in the calibration process of the breather valve in real time and intuitively, the detection tables can accurately measure and monitor the pressure and flow parameters of the breather valve, and the measuring air nozzles can facilitate the user to simultaneously connect a plurality of breather valves for calibration, thereby improving the efficiency of calibration work.

[0028] The utility model has the advantages of the following beneficial effects:

[0029] 1、In the utility model, by rotating the rotating block of the box block outer wall, the arc-shaped column is lifted to release the hooking of the upper box block, then the upper box block is opened to expose the internal structure, then the ball-shaped handle is pushed to rotate the rotating branch to lift the lifting operation platform, when the lifting operation platform reaches the required height, the ball-shaped handle is loosened, the clamping block is clamped with the clamping groove, thereby fixing the position of the lifting operation platform, so as to calibrate different specifications of the breather valve.

[0030] 2、In the utility model, by rotating and fixing the supporting mechanism on both sides of the bottom of the lifting operation platform, the fixing screw is rotated to release the fixing of the sliding rod, the sliding rod is pulled out until the supporting disc can be supported above the plane, then the fixing screw is rotated again to fix the sliding rod again, thereby completing the support on both sides of the lifting operation platform, preventing the device from shaking to affect the calibration accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A perspective view of a portable breathing valve calibration device is provided for the utility model;

[0032] Figure 2 A front view of a portable breathing valve calibration device is provided for the utility model;

[0033] Figure 3 A side view of a portable breathing valve calibration device is provided for the utility model;

[0034] Figure 4 A structure diagram of the lower box block of a portable breathing valve calibration device is provided for the utility model;

[0035] Figure 5 A support mechanism diagram of a portable breathing valve calibration device is provided for the utility model.

[0036] Legend:

[0037] 1, lower box block; 2, support mechanism; 201, fixed concave disc; 202, spherical block; 203, hollow column; 204, sliding rod; 205, fixed screw; 206, support disc; 3, upper box block; 4, hinge; 5, rotating block; 6, arc column; 7, hook; 8, rotating support; 9, U-shaped sliding block; 10, clamping block; 11, lifting operation platform; 12, spherical handle; 13, clamping groove; 14, triangular protection block; 15, buffer block; 16, U-shaped strip; 17, silica gel sleeve; 18, fixed ring; 19, gas cylinder; 20, groove; 21, elastic arc-shaped strip; 22, annular block; 23, clamping groove; 24, display screen; 25, detection table; 26, measuring air nozzle. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0039] Reference Figure 1 , Figure 3 and Figure 4The utility model provides a kind of portable breathing valve calibration device, including lower box block 1 and upper box block 3, the outer wall bottom left and right sides of upper box block 3 are fixedly connected with hinge 4, the bottom of upper box block 3 is rotatably connected with lower box block 1 by the bottom of hinge 4, rotate upper box block 3, make it open by hinge 4 around lower box block 1, expose internal structure, the outer wall front left and right sides of lower box block 1 are rotatably connected with rotating block 5, the outer wall top of rotating block 5 is rotatably connected with arc column 6, the top left and right sides of upper box block 3 are fixedly connected with hook 7, rotating block 5 of lower box block 1 outer wall front is rotated, in turn drive arc column 6 to rotate and rise, to make it with the hook 7 of upper box block 3 top disengages, the inner wall bottom left and right ends of lower box block 1 are rotatably connected with rotating branch 8, the top of rotating branch 8 is rotatably connected with U-shaped sliding block 9, the top of U-shaped sliding block 9 is slidably connected with clamping block 10, the outer wall of two clamping blocks 10 is slidably connected with lifting operation platform 11, the top of lifting operation platform 11 is fixedly connected with spherical handle 12, push both sides spherical handle 12, so that rotating branch 8 is rotated under the promotion, in turn lifting operation platform 11 is raised, the top front side of lifting operation platform 11 is provided with multiple clamping groove 13, loosen the holding of spherical handle 12, under the action of gravity, it will move to bottom, in turn make clamping block 10 and the clamping groove 13 above lifting operation platform 11 engage, realize the fixing of lifting operation platform 11 position, the outer wall of clamping block 10 and the inner wall of clamping groove 13 are engaged, the left and right sides of the bottom of lifting operation platform 11 are provided with support mechanism 2;

[0040] Specifically, first rotating block 5 of lower box block 1 outer wall front is rotated, in turn drive arc column 6 to rotate and rise, to make it with the hook 7 of upper box block 3 top disengages, subsequently rotate upper box block 3, make it open by hinge 4 around lower box block 1, expose internal structure, then, upper box block 3 is stably supported in open state, facilitate subsequent operation, then, push both sides spherical handle 12, so that rotating branch 8 is rotated under the promotion, in turn lifting operation platform 11 is raised, after reaching the required height, loosen the holding of spherical handle 12, under the action of gravity, it will move to bottom, in turn make clamping block 10 and the clamping groove 13 above lifting operation platform 11 engage, realize the fixing of lifting operation platform 11 position, to facilitate according to the scene required to be used, to check different specifications of breathing valve.

[0041] Refer to Figure 1 、 Figure 2 And Figure 5The support mechanism 2 includes two fixed concave discs 201, the top ends of which are fixedly connected to the bottom left and right sides of the lifting operation table 11, the inner wall of the fixed concave disc 201 is slidably connected with a spherical block 202, the spherical block 202 can conveniently adjust the angle of the entire support according to the scene of use, the bottom end of the spherical block 202 is fixedly connected with a hollow column 203, the inner wall of the hollow column 203 is slidably connected with a sliding rod 204, the outer wall bottom end of the hollow column 203 is threadedly connected with a fixed screw 205, the bottom end of the sliding rod 204 is rotatably connected with a support disc 206, by rotating the fixed screw 205, the extrusion fixation of the fixed screw 205 and the sliding rod 204 is released, then the sliding rod 204 is pulled out of the hollow column 203, until the support disc 206 can be supported above the plane, at this time the fixed screw 205 is rotated again, so that the sliding rod 204 is extruded and fixed again by the fixed screw 205;

[0042] Specifically, when the lifting operation table 11 is lifted to a height higher than the lower box block 1, at this time the support mechanism 2 located at the bottom of the lifting operation table 11 on both sides is turned out, and after being fixed at a height, the extrusion fixation of the fixed screw 205 and the sliding rod 204 is released by rotating the fixed screw 205, then the sliding rod 204 is pulled out of the hollow column 203, until the support disc 206 can be supported above the plane, at this time the fixed screw 205 is rotated again, so that the sliding rod 204 is extruded and fixed again by the fixed screw 205, thereby completing the support of the lifting operation table 11 on both sides, avoiding the influence of device shaking on verification accuracy.

[0043] Referring to Figure 1 , Figure 2 and Figure 3 , the outer wall of the lower box block 1 and the outer wall of the upper box block 3 are fixedly connected with a plurality of triangular protective blocks 14 at the four corner sides, the triangular protective blocks 14 can disperse the impact force to different directions, the outer wall of the triangular protective block 14 is fixedly connected with a buffer block 15, the buffer block 15 can absorb and buffer the impact force by its elastic deformation; the outer wall of the lower box block 1 is rotatably connected with a U-shaped strip 16 at the middle of the front side, the U-shaped strip 16 can be rotated and unfolded when needed, serving as a hand-held handle, the outer wall of the U-shaped strip 16 is fixedly connected with a silica gel sleeve 17, which can provide a comfortable grip for the user; the inner wall of the lower box block 1 is fixedly connected with a fixed ring 18 at the bottom rear side left and right ends, the fixed ring 18 can firmly fix the gas cylinder 19 inside the lower box block 1, the inner wall of the two fixed rings 18 is fixedly connected with a gas cylinder 19, which can continuously and stably output gas, providing reliable pressure guarantee for the verification of the breathing valve;

[0044] Specifically, by the triangular protection block 14, the stable geometric structure of the triangle can be utilized to disperse the impact force in different directions when the device is impacted by external force, effectively avoiding the damage of the box body due to local excessive stress, and the buffer block 15 can utilize the elastic deformation to absorb and buffer the impact force, further reducing the influence of external force on the precise components of the internal calibration device of the box body, providing reliable physical protection for the entire device, the U-shaped strip 16 can be used as a hand-held handle when moving by rotating and unfolding the U-shaped strip 16, the silicone sleeve 17 can provide a comfortable grip for the user, avoiding discomfort in the hands caused by long-term lifting, and effectively preventing the device from slipping from the hands during lifting, improving the safety and convenience during use, the fixing ring 18 can firmly fix the gas cylinder 19 inside the lower box block 1, preventing the gas cylinder 19 from shaking, shifting or even falling during the movement and transportation of the device, ensuring the installation stability of the gas cylinder 19, and the gas cylinder 19 can continuously and stably output gas to provide reliable pressure protection for the calibration of the breathing valve, thereby ensuring the accuracy and efficiency of the calibration work.

[0045] Referring to Figure 1 , Figure 2 and Figure 4 , a plurality of grooves 20 are formed in the front inner wall of the upper box block 3, which can provide a dedicated space for storing small calibration tools, spare parts or spare consumables, and a plurality of elastic arc-shaped strips 21 are fixedly connected to the front inner wall of the upper box block 3, which can clamp and fix the placed objects by the elastic force of the elastic arc-shaped strips 21; the top end of the lower box block 1 is fixedly connected with a ring-shaped block 22, and the front side of the upper box block 3 is provided with a clamping groove 23, the ring-shaped block 22 can be accurately embedded into the clamping groove 23, and the stable connection between the upper box block 3 and the lower box block 1 is realized by the clamping effect between the two, effectively preventing the box from being accidentally opened during transportation or use; the top middle part of the lifting operation platform 11 is fixedly connected with a display screen 24, which can display the key data in the calibration process of the breathing valve in real time and intuitively, the top left and right sides of the lifting operation platform 11 are fixedly connected with detection tables 25, which can accurately measure and monitor the pressure and flow parameters of the breathing valve, and a plurality of measuring gas nozzles 26 are fixedly connected to the top front side of the lifting operation platform 11, which can facilitate the user to connect multiple breathing valves for calibration at the same time;

[0046] Specifically, the groove 20 can provide a dedicated space for storing small calibration tools, spare parts or consumables, facilitating users to classify and store and quickly access, effectively avoiding the situation that the tools randomly roll inside the box and are lost, the elastic arc-shaped strip 21 can clamp and fix the placed objects through its elastic force, preventing displacement during device transportation or shaking, further improving the stability and safety of storage, and also providing a certain buffering protection effect to the placed objects, the annular block 22 can be accurately embedded into the clamping groove 23, and the stable connection between the upper box block 3 and the lower box block 1 is realized through the clamping effect between the two, effectively preventing the box from being accidentally opened during transportation or use, protecting the safety of the internal calibration device, the display screen 24 can display the key data in the calibration process of the breather valve in real time and intuitively, the detection table 25 can accurately measure and monitor the pressure and flow parameters of the breather valve, ensuring the accuracy and reliability of the measurement data, and the measuring air nozzle 26 can facilitate users to connect multiple breather valves for calibration at the same time, improving the efficiency of calibration work.

[0047] Working principle: first, rotate the rotating block 5 at the front end of the outer wall of the lower box block 1 to drive the arc-shaped column 6 to rise, thereby releasing the connection with the hook 7 on the top of the upper box block 3, then rotate the upper box block 3 to make it rotate around the lower box block 1 through the hinge 4 and open to expose the internal structure, then stably support the upper box block 3 in the open position for subsequent operation, then push the ball-shaped handle 12 on both sides to make the rotating support 8 rotate and then lift the lifting operation table 11 to the required height, after reaching the predetermined height, release the ball-shaped handle 12 to make it move to the bottom under the action of gravity, and then make the clamping block 10 clamped with the clamping groove 13 above the lifting operation table 11, thereby fixing the position of the lifting operation table 11, so as to facilitate the calibration of different specifications of breather valves according to different use scenarios, and when the lifting height of the lifting operation table 11 exceeds the lower box block 1, the support mechanism 2 located at the bottom of the lifting operation table 11 on both sides can be rotated and unfolded, and after being adjusted to an appropriate height, the rotating fixing screw 205 is rotated to release the extrusion fixing state between the support mechanism 2 and the sliding rod 204, then the sliding rod 204 is pulled out of the hollow column 203 until the support disc 206 can be stably supported on the plane, at this time, the rotating fixing screw 205 is rotated again to make the fixing screw 205 extrude and fix the sliding rod 204 again, thereby realizing effective support on both sides of the lifting operation table 11, ensuring the stability of the device and avoiding the influence of shaking on the calibration accuracy.

[0048] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A portable breathing valve calibration device, comprising a lower housing block (1) and an upper housing block (3), characterized in that: Hinges (4) are fixedly connected to the bottom left and right sides of the outer wall of the upper box block (3). The bottom of the upper box block (3) is rotatably connected to the lower box block (1) through the bottom of the hinges (4). Rotating blocks (5) are rotatably connected to the left and right sides of the front part of the outer wall of the lower box block (1). An arc-shaped column (6) is rotatably connected to the top of the outer wall of the rotating block (5). Hooks (7) are fixedly connected to the top left and right sides of the upper box block (3). Rotating support bars (8) are rotatably connected to the left and right ends of the bottom front side of the inner wall of the lower box block (1). The top of the U-shaped slider (9) is rotatably connected to the top of the U-shaped slider (9), and the top of the U-shaped slider (9) is slidably connected to the locking block (10). The outer walls of the two locking blocks (10) are slidably connected to the lifting operating platform (11). The top of the lifting operating platform (11) is fixedly connected to the ball handle (12). The top front side of the lifting operating platform (11) is provided with multiple slots (13). The outer wall of the locking block (10) is engaged with the inner wall of the slot (13). The bottom left and right sides of the lifting operating platform (11) are provided with support mechanisms (2).

2. The portable breathing valve calibration device according to claim 1, characterized in that: The support mechanism (2) includes two fixed concave plates (201). The top ends of the two fixed concave plates (201) are respectively fixedly connected to the bottom left and right sides of the lifting operating platform (11). A spherical block (202) is slidably connected to the inner wall of the fixed concave plate (201). A hollow column (203) is fixedly connected to the bottom end of the spherical block (202). A sliding rod (204) is slidably connected to the inner wall of the hollow column (203). A fixing screw (205) is threadedly connected to the bottom end of the outer wall of the hollow column (203). A support plate (206) is rotatably connected to the bottom end of the sliding rod (204).

3. The portable breathing valve calibration device according to claim 1, characterized in that: Multiple triangular protective blocks (14) are fixedly connected to the four corners of the outer walls of the lower box block (1) and the upper box block (3), and buffer blocks (15) are fixedly connected to the outer walls of the triangular protective blocks (14).

4. The portable breathing valve calibration device according to claim 1, characterized in that: A U-shaped strip (16) is rotatably connected to the middle of the front side of the outer wall of the lower box block (1), and a silicone sleeve (17) is fixedly connected to the outer wall of the U-shaped strip (16).

5. The portable breathing valve calibration device according to claim 1, characterized in that: The bottom rear side of the inner wall of the lower box block (1) is fixedly connected with a fixing ring (18), and the inner walls of the two fixing rings (18) are fixedly connected with a pressure bottle (19).

6. The portable breathing valve calibration device according to claim 1, characterized in that: The upper box block (3) has multiple grooves (20) on the front side of its inner wall, and multiple elastic arc strips (21) are fixedly connected to the front part of the inner wall of the upper box block (3).

7. The portable breathing valve calibration device according to claim 1, characterized in that: The top of the lower box block (1) is fixedly connected to an annular block (22), and the front side of the upper box block (3) is provided with a locking groove (23).

8. A portable breathing valve calibration device according to claim 1, characterized in that: A display screen (24) is fixedly connected to the top center of the lifting platform (11), and a test gauge (25) is fixedly connected to the left and right sides of the top of the lifting platform (11). Multiple measuring nozzles (26) are fixedly connected to the front of the top of the lifting platform (11).

Images