Puncture structure for moisture meter

Abstract

The utility model relates to the field of puncture structures, in particular to a puncture structure for a moisture meter, which comprises a puncture support, a middle-layer plate and a pressing cap. A locknut is arranged at the upper end part of the puncture bracket; a guide ring is arranged at the lower end of the puncture support. The locknut and the guide ring are in clearance fit; a first compression spring is mounted at the lower end part of the guide ring; the first compression spring and the second compression spring are arranged to assist in driving the air inlet puncture needle body and the air outlet needle body so as to puncture a sample bottle and improve the sealing performance during puncture, and therefore the problem that in the sample bottle puncture process, when an existing puncture structure for the moisture meter conducts puncture through an air inlet needle, the sample bottle cannot be punctured easily is solved. The puncture structure for the moisture meter solves the problem that the use effect of the puncture structure for the moisture meter is reduced due to the fact that air needs to be continuously blown into a bottle during the period from puncture of an air inlet needle to puncture of an air outlet needle and air loss is easily caused.

Description

Technical Field

[0001] The utility model relates to the field of puncture structures, in particular to a puncture structure used for a moisture meter. Background Art

[0002] Moisture meter is a commonly used water quality detection device. Before use, it is necessary to use a sample bottle to sample the water. The puncture structure currently used in the moisture meter is that the air inlet puncture needle follows the screw structure to puncture the sample bottle seal first, and then the air outlet needle punctures the sample bottle seal, thus completing the entire puncture process.

[0003] Therefore, when the existing puncture structure for moisture meter uses the air inlet puncture needle to puncture the sample bottle seal, it is necessary to continuously blow air into the bottle during the period from the air inlet puncture needle puncturing the sample bottle seal to the air outlet needle puncturing the sample bottle seal, which will cause a small amount of gas in the bottle to be lost, affecting the measurement effect.

[0004] Therefore, in view of the fact that the puncture structure for the moisture meter mentioned above is prone to gas loss during the puncture of the air inlet puncture needle and the puncture of the air outlet needle, which affects the measurement effect, a puncture structure for the moisture meter can be designed to adjust the puncture pressure and puncture position to prevent sample loss. Utility Model Content

[0005] In order to overcome the problem that during the puncture process of the sample bottle, the existing puncture structure for the moisture meter uses the air inlet needle to puncture, and during the period from the puncture of the air inlet needle to the puncture of the air outlet needle, it is necessary to continuously blow air into the bottle, which can easily lead to gas loss, thereby reducing the use effect of the puncture structure for the moisture meter.

[0006] The technical solution of the utility model is: a puncture structure for a moisture meter, comprising a puncture bracket, a middle plate, and a pressure cap; a lock nut is provided at the upper end of the puncture bracket; a guide ring is provided at the lower end of the puncture bracket; the lock nut and the guide ring are arranged to be clearance-fitted, and a first compression spring is installed at the lower end of the guide ring.

[0007] Preferably, the remaining components are supported and installed by providing a puncture bracket, a middle plate, and a pressure cap; the air needle is installed by providing an air pipe nut, an air inlet needle fixing piece, and an air outlet needle fixing piece to facilitate subsequent puncture; and the air inlet puncture needle and the air outlet needle body are provided to perform puncture and balance the air pressure to reduce water loss.

[0008] Preferably, a middle plate is provided at the lower end of the first compression spring; a retaining spring is installed at the lower end of the middle plate; and a second compression spring is installed at the lower end of the retaining spring.

[0009] Preferably, a pressure cap is provided at the lower end of the second compression spring; a guide shaft is clearance-fitted at the upper end of the pressure cap; the guide shaft is arranged on the inner side of the first compression spring and the second compression spring; the guide shaft is arranged in sliding connection with the guide ring and the middle plate; the anti-loosening nut and the guide shaft are clearance-fitted.

[0010] Preferably, a tracheal nut is provided at one end of the puncture bracket; a hand-tightening nut is provided at the lower end of the tracheal nut; and a conical washer is installed between the tracheal nut and the hand-tightening nut.

[0011] Preferably, an air intake needle fixing piece is installed at the lower end of the hand-tightening nut; and an air intake puncture needle is provided at the lower end of the conical washer.

[0012] Preferably, a first pressure ring is provided at the lower end of the middle plate; a countersunk screw is provided at the upper end of the first pressure ring; and a first sealing gasket is installed at the lower end of the first pressure ring.

[0013] Preferably, the outer gap of the first pressure ring is fitted with an air outlet needle fixing piece; the lower end of the air outlet needle fixing piece is installed with an air outlet needle body; a second pressure ring is provided on the outer side of the air outlet needle body; and a second sealing gasket is provided at the lower end of the second pressure ring.

[0014] Beneficial effects of the utility model:

[0015] 1. By arranging a first compression spring and a second compression spring to assist in driving the air inlet puncture needle and the air outlet needle body to puncture the sample bottle and improve the sealing during puncture, the problem that during the puncture of the sample bottle, the existing puncture structure for the moisture meter uses the air inlet needle to puncture, and during the period from the air inlet needle to the air outlet needle, it is necessary to continuously blow air into the bottle, which easily leads to gas loss and reduces the use effect of the puncture structure for the moisture meter, thereby improving the use effect of the entire puncture structure for the moisture meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is an exploded view of a puncture structure for a moisture meter of the present utility model;

[0017] Figure 2 Shown is a partial cross-sectional structural diagram of a puncture structure for a moisture meter of the present invention;

[0018] Figure 3 Shown is a schematic diagram of a puncture structure puncture bracket structure for a moisture meter of the present invention;

[0019] Figure 4 Shown is a schematic diagram of the structure of a middle plate of a puncture structure for a moisture meter of the present invention;

[0020] Figure 5 Shown is a schematic diagram of a puncture structure pressure cap structure for a moisture meter of the present invention.

[0021] Explanation of the accompanying drawings: 1. Puncture bracket; 2. Anti-loosening nut; 3. Guide ring; 4. First compression spring; 5. Guide shaft; 6. Middle plate; 7. Retaining ring; 8. Second compression spring; 9. Pressure cap; 10. Trachea nut; 11. Thumb nut; 12. Conical washer; 13. Inlet needle fixing piece; 14. Inlet puncture needle; 15. First pressure ring; 16. Countersunk screw; 17. First sealing gasket; 18. Outlet needle fixing piece; 19. Outlet needle body; 20. Second pressure ring; 21. Second sealing gasket. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] See also Figure 1-Figure 5 The utility model provides an embodiment: a puncture structure for a moisture meter, comprising a puncture bracket 1, a middle plate 6, and a pressure cap 9; a lock nut 2 is provided at the upper end of the puncture bracket 1; a guide ring 3 is provided at the lower end of the puncture bracket 1; the lock nut 2 and the guide ring 3 are configured to be clearance-fitted; a first compression spring 4 is installed at the lower end of the guide ring 3; a middle plate 6 is provided at the lower end of the first compression spring 4; a retaining spring 7 is installed at the lower end of the middle plate 6; a second compression spring 8 is installed at the lower end of the retaining spring 7; and a second compression spring 8 is installed at the lower end of the second compression spring 8. A pressure cap 9 is provided; a guide shaft 5 is gap-fitted on the upper end of the pressure cap 9; the guide shaft 5 is arranged on the inner side of the first compression spring 4 and the second compression spring 8; the guide shaft 5 is arranged to be in sliding connection with the guide ring 3 and the middle plate 6; the anti-loosening nut 2 and the guide shaft 5 are gap-fitted; the sample bottle is docked through the pressure cap 9, and the first compression spring 4 and the second compression spring 8 are guided by the guide shaft 5, so that the stroke of the air inlet puncture needle 14 and the air outlet needle body 19 can be adjusted by adjusting the pressure difference of the first compression spring 4 and the second compression spring 8, thereby performing puncture.

[0024] See also Figure 3-Figure 5In this embodiment, a tracheal nut 10 is provided at one end of the puncture bracket 1; a hand-tightening nut 11 is provided at the lower end of the tracheal nut 10; a conical washer 12 is installed between the tracheal nut 10 and the hand-tightening nut 11; an air intake needle fixing member 13 is installed at the lower end of the hand-tightening nut 11; an air intake puncture needle 14 is provided at the lower end of the conical washer 12; a first pressure ring 15 is provided at the lower end of the middle plate 6; a countersunk screw 16 is provided at the upper end of the first pressure ring 15; the first A first sealing gasket 17 is installed at the lower end of the pressure ring 15; the outer gap of the first pressure ring 15 is fitted with an air outlet needle fixing part 18; the lower end of the air outlet needle fixing part 18 is fitted with an air outlet needle body 19; a second pressure ring 20 is provided on the outer side of the air outlet needle body 19; a second sealing gasket 21 is provided at the lower end of the second pressure ring 20; an external air pipe is installed through the air pipe nut 10, so that the sample bottle can be inflated using the air inlet puncture needle 14, and the puncture is carried out through the air outlet needle body 19.

[0025] During installation, first, the air outlet needle body 19 is assembled to the air outlet needle fixing part 18 through threads; the first sealing gasket 17 is assembled into the hole of the air outlet needle fixing part 18 and the first pressure ring 15 is assembled through threads. Then, the air outlet needle fixing part 18 and the middle layer plate 6 are fixed by countersunk screws 16. Then, the air inlet puncture needle 14 is assembled into the hole of the air inlet needle fixing part 13, assembled to the puncture bracket 1 from bottom to top and fixed by hand-tightening the nut 11. Finally, the external air pipe connecting conical washer 12 is assembled to the air inlet needle fixing part 13 and fixed with the air pipe nut 10.

[0026] During use, when the moisture meter tests the sample, the screw motor drives the puncture bracket 1 to move downward so that the hole of the pressure cap 9 can cover the sample bottle. Since the force required for the deformation of the second compression spring 8 is smaller than the force required for the deformation of the first compression spring 4, the second compression spring 8 is first deformed and compressed until the air outlet needle body 19 contacts the sealing gasket of the sample bottle. Then the first compression spring 4 is deformed and compressed, and the air inlet puncture needle 14 pierces the sealing gasket of the sample bottle. The second compression spring 8 continues to deform and compress until the pressure cap 9 contacts the air outlet needle fixing part 18 so that the air outlet needle body 19 pierces the sealing gasket of the sample bottle.

[0027] Through the above steps, the remaining components are supported and installed by setting the puncture bracket 1, the middle plate 6, and the pressure cap 9; the air needle is installed by setting the air pipe nut 10, the air inlet needle fixing part 13 and the air outlet needle fixing part 18 to facilitate subsequent puncture; the air inlet puncture needle 14 and the air outlet needle main body 19 are set to perform puncture and balance the air pressure to reduce water loss, so as to solve the problem that during the puncture of the sample bottle, when the existing puncture structure for the moisture meter uses the air inlet needle for puncture, it is necessary to continuously blow air into the bottle during the period from the air inlet needle puncture to the air outlet needle puncture, which can easily lead to gas loss, thereby reducing the use effect of the puncture structure for the moisture meter, thereby improving the use effect of the entire puncture structure for the moisture meter.

Claims

1. A puncture structure for a moisture meter, comprising a puncture bracket (1); characterized in that: It also includes a middle plate (6) and a pressure cap (9); a locking nut (2) is provided at the upper end of the puncture bracket (1); a guide ring (3) is provided at the lower end of the puncture bracket (1); the locking nut (2) and the guide ring (3) are arranged to be clearance-fitted, and a first compression spring (4) is installed at the lower end of the guide ring (3).

2. The puncture structure for a moisture meter according to claim 1, characterized in that: The lower end of the first compression spring (4) is provided with a middle plate (6); the lower end of the middle plate (6) is installed with a retaining spring (7); and the lower end of the retaining spring (7) is installed with a second compression spring (8).

3. The puncture structure for a moisture meter according to claim 2, characterized in that: The lower end of the second compression spring (8) is provided with a pressure cap (9); the upper end of the pressure cap (9) is clearance-fitted with a guide shaft (5); the guide shaft (5) is arranged inside the first compression spring (4) and the second compression spring (8); the guide shaft (5) is arranged in sliding connection with the guide ring (3) and the middle plate (6); and the anti-loosening nut (2) is clearance-fitted with the guide shaft (5).

4. The puncture structure for a moisture meter according to claim 1, characterized in that: A tracheal nut (10) is provided at one end of the puncture bracket (1); a hand-tightening nut (11) is provided at the lower end of the tracheal nut (10); and a conical washer (12) is installed between the tracheal nut (10) and the hand-tightening nut (11).

5. The puncture structure for a moisture meter according to claim 1, characterized in that: An air intake needle fixing member (13) is installed at the lower end of the hand-tightening nut (11); and an air intake puncture needle (14) is provided at the lower end of the conical washer (12).

6. The puncture structure for a moisture meter according to claim 2, characterized in that: A first pressure ring (15) is provided at the lower end of the middle plate (6); a countersunk screw (16) is provided at the upper end of the first pressure ring (15); and a first sealing gasket (17) is installed at the lower end of the first pressure ring (15).

7. The puncture structure for a moisture meter according to claim 6, characterized in that: An air outlet needle fixing piece (18) is fitted in the outer clearance of the first pressure ring (15); an air outlet needle body (19) is installed at the lower end of the air outlet needle fixing piece (18); a second pressure ring (20) is provided on the outer side of the air outlet needle body (19); and a second sealing gasket (21) is provided at the lower end of the second pressure ring (20).

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