Digital pressure tester calibration device

Abstract

The utility model discloses a digital pressure tester calibration device, which comprises a base, a mounting seat and a micropressure increasing and reducing pump, four support legs are arranged at the bottom of the base, the mounting seat and the micropressure increasing and reducing pump are respectively mounted on the base and are communicated through a guide pipe, a digital pressure tester is detachably mounted on the mounting seat, and the digital pressure tester is detachably mounted on the mounting seat. The mounting base comprises a base body, a rotating sleeve and a locking piece, a groove is formed in the base body, a mounting pipe and a movable opening are formed in the groove, the rotating sleeve is rotationally mounted on the base body and provided with a push block, and the locking piece is movably mounted in the movable opening; an insertion tube and a cap body are arranged at the bottom of the digital pressure tester, a bayonet is formed in the side wall of the cap body, and the rotating sleeve is rotated, so that the push block rotates and pushes the locking piece to penetrate through the movable opening to enter the bayonet, and movement of the cap body and the insertion tube is limited. According to the utility model, a thread structure is not required to be used at the interface, so that the problem of leakage caused by abrasion is avoided, the calibration precision is improved, and the installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration, in particular to a calibration device for a digital pressure tester. Background Art

[0002] A digital pressure tester is a testing instrument that intuitively expresses pressure values ​​through numbers. Before using the digital pressure tester, a precision digital pressure test calibration device is required to test and calibrate the digital pressure tester.

[0003] The digital pressure tester needs to be installed on the corresponding interface when installed on the calibration device. However, most of the interfaces are threaded installation structures. The frequent changes in the calibration pressure often cause the interface to wear due to frequent disassembly and assembly and long-term use, resulting in leakage problems, affecting the accuracy of the calibration and failing to meet the use standards. Therefore, it is necessary to design a method that does not require the use of a threaded structure at the interface, avoids the problem of leakage due to wear, improves the calibration accuracy, and facilitates installation. Utility Model Content

[0004] The utility model aims to provide a digital pressure tester calibration device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A digital pressure tester calibration device comprises a base, a mounting seat and a plus-minus micro-pressure pump, wherein the bottom of the base is provided with four legs, the mounting seat and the plus-minus micro-pressure pump are respectively mounted on the base and communicated with each other through a conduit, and the digital pressure tester is detachably mounted on the mounting seat, the mounting seat comprises a seat body, a rotating sleeve and a locking piece, the seat body is mounted on the base and is provided with a groove opening upward, a mounting tube is provided in the groove and at least three movable openings communicating with each other inside and outside are opened on the side wall, the rotating sleeve is rotatably mounted on the seat body and is provided with a pushing block, and the locking piece is movably mounted on the movable opening; an insert tube is provided at the bottom of the digital pressure tester and a cap body is provided at the bottom of the insert tube, a bayonet is provided on the side wall of the cap body, the insert tube is inserted into the mounting tube, the cap body is embedded in the groove and covered on the top of the mounting tube, and by rotating the rotating sleeve, the pushing block rotates and pushes the locking piece through the movable opening into the bayonet to limit the movement of the cap body and the insert tube.

[0007] Furthermore, a sealing ring is provided at the top of the cap body, and the cap body cover is provided on the insertion tube. After the locking piece is snap-fitted and locked, the sealing ring fits tightly on the top of the insertion tube.

[0008] Furthermore, a sealing ring is provided along the outer circumference of the bottom of the inserting tube, and the sealing ring is tightly fitted with the inner wall of the installation tube.

[0009] Furthermore, the installation pipe is communicated with the interface.

[0010] Furthermore, the outer wall of the seat body is provided with a concave ring, and the rotating sleeve is provided with a clamping ring embedded in the concave ring.

[0011] Furthermore, the push block is a semi-ellipsoid.

[0012] Furthermore, the lock is provided with a spring, and when the push block is separated from the lock, the spring pushes it out of the bayonet and into the movable opening.

[0013] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0014] The utility model installs the digital pressure tester through the mounting seat, and uses the groove of the mounting seat to set the mounting tube as an interface to communicate with the insertion tube of the digital pressure tester, the cap body is embedded in the groove and covered on the mounting tube, and the rotating sleeve is rotated and the locking piece is pushed into the bayonet to be locked by the bayonet connection, so that the cap body is tightly covered on the mounting tube, and the sealing ring is cooperated to improve the closed environment. For disassembly, only the rotating sleeve needs to be rotated, and the locking piece can be withdrawn from the bayonet to be disassembled. It is convenient to use, and the traditional threaded mounting structure is replaced by this structure, and the sealing effect will not be reduced by long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the utility model from another angle;

[0017] Figure 3 This is a schematic diagram of the digital pressure tester of the utility model being installed on a mounting base;

[0018] Figure 4 This is a cross-sectional view of the digital pressure tester of the utility model installed on a mounting base.

[0019] Description of reference numerals:

[0020] Base 1; mounting base 2; plus / minus micro-pressure pump 3; digital pressure tester 4; support leg 11; seat body 21; rotating sleeve 22; locking piece 23; groove 24; mounting tube 25; movable opening 26; push block 27; concave ring 28; snap ring 29; spring 231; insert tube 41; cap body 42; snap joint 43; sealing ring 44; sealing ring 45. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] Example

[0024] Cooperate Figures 1 to 4 As shown, the utility model discloses a digital pressure tester calibration device, including a base 1, a mounting seat 2 and a plus-minus micro-pressure pump 3, the bottom of the base 1 is provided with four legs 11, the mounting seat 2 and the plus-minus micro-pressure pump 3 are respectively mounted on the base 1 and communicated through a conduit, the digital pressure tester 4 is detachably mounted on the mounting seat 2, the mounting seat 2 includes a seat body 21, a rotating sleeve 22 and a locking member 23, the seat body 21 is mounted on the base 1, and is provided with a groove 24 with an opening facing upward, a mounting tube 25 is provided in the groove 24, and at least three movable holes 25 are provided on the side wall to communicate with each other inside and outside. The rotating sleeve 22 is rotatably mounted on the seat body 21 and is provided with a push block 27. The locking piece 23 is movably mounted on the movable opening 26. The bottom of the digital pressure tester 4 is provided with a plug 41 and a cap body 42 is provided at the bottom of the plug 41. The side wall of the cap body 42 is provided with a bayonet 43. The plug 41 is inserted into the mounting tube 25. The cap body 42 is embedded in the groove 24 and covers the top of the mounting tube 25. By rotating the rotating sleeve 22, the push block 27 rotates and pushes the locking piece 23 through the movable opening 26 and into the bayonet 43, thereby limiting the movement of the cap body 42 and the plug 41.

[0025] A sealing ring 44 is provided at the top of the cap body 42 . The cap body 42 is covered on the insertion tube 41 . After the locking member 23 is engaged and locked, the sealing ring 44 fits tightly on the top of the insertion tube 41 .

[0026] A sealing ring 45 is provided along the outer circumference of the bottom of the inserting tube 41 , and the sealing ring 45 is tightly fitted to the inner wall of the mounting tube 25 .

[0027] The installation pipe 25 is communicated with the interface.

[0028] The outer wall of the seat body 21 is provided with a concave ring 28 , and the rotating sleeve 22 is provided with a snap ring 29 embedded in the concave ring 28 .

[0029] The push block 27 is a semi-ellipsoid. The width of the movable opening in this embodiment is limited, so that the rotation range of the rotating sleeve 22 is limited, preferably -30° to +30°.

[0030] The lock member 23 is provided with a spring 231 . When the push block 27 is separated from the lock member 23 , the spring 231 pushes the push block 27 out of the latch hole 43 and into the movable hole 26 .

[0031] The digital pressure tester 4 is installed through the mounting base 2, and the mounting tube 25 is set by using the groove 24 of the mounting base 2 as an interface to communicate with the insert tube 41 of the digital pressure tester 4, the cap body 42 is embedded in the groove 24 and covered on the mounting tube 25, and the rotating sleeve 22 is used to rotate and push the locking piece 23 into the bayonet 43 for locking, so that the cap body 42 is tightly covered on the mounting tube 25, and the sealing ring 44 is used to improve the closed environment. For disassembly, only the rotating sleeve 22 needs to be rotated, and the locking piece 23 can be withdrawn from the bayonet 43 for disassembly. It is convenient to use. The traditional threaded mounting structure is replaced by this structure, and the sealing effect will not be reduced by long-term use.

[0032] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A digital pressure tester calibration device, characterized in that: It includes a base, a mounting seat and a micro-pressure pump for adding and subtracting. The bottom of the base is provided with 4 supporting legs. The mounting seat and the micro-pressure pump for adding and subtracting are respectively mounted on the base and are connected through a conduit. The digital pressure tester is detachably mounted on the mounting seat. The mounting seat includes a seat body, a rotating sleeve and a locking piece. The seat body is mounted on the base and is provided with a groove with an opening facing upward. A mounting tube is provided in the groove and at least 3 movable openings communicating with the inside and outside are opened on the side wall. The rotating sleeve is rotatably mounted on the seat body and is provided with a pushing block. The locking piece is movably mounted on the movable opening. The bottom of the digital pressure tester is provided with an insert tube and a cap body is provided at the bottom of the insert tube. The side wall of the cap body is provided with a bayonet. The insert tube is inserted into the mounting tube. The cap body is embedded in the groove and covers the top of the mounting tube. By rotating the rotating sleeve, the pushing block rotates and pushes the locking piece through the movable opening into the bayonet to limit the movement of the cap body and the insert tube.

2. A digital pressure tester calibration device as claimed in claim 1, characterized in that: A sealing ring is provided in the top of the cap body, and the cap body cover is provided on the insertion tube. After the locking piece is engaged and locked, the sealing ring is tightly fitted on the top of the insertion tube.

3. A digital pressure tester calibration device as claimed in claim 2, characterized in that: A sealing ring is provided along the outer circumference of the bottom of the inserting tube, and the sealing ring is tightly fitted with the inner wall of the installation tube.

4. A digital pressure tester calibration device as claimed in claim 3, characterized in that: The installation pipe is communicated with the interface.

5. A digital pressure tester calibration device as claimed in claim 1, characterized in that: The outer wall of the seat body is provided with a concave ring, and the rotating sleeve is provided with a clamping ring embedded in the concave ring.

6. A digital pressure tester calibration device as claimed in claim 1, characterized in that: The push block is a semi-ellipsoid.

7. A digital pressure tester calibration device as claimed in claim 1, characterized in that: The lock piece is provided with a spring. When the push block is separated from the lock piece, the spring pushes the push block out of the bayonet and into the movable opening.

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