Portable pressure calibration tool

Abstract

The utility model discloses a portable pressure calibration tool, relates to the calibration tool field, the portable pressure calibration tool comprises a pressure gauge main body and a boost housing, the boost housing is internally provided with an inner cylinder, the inner cylinder is internally provided with a pop-up assembly, and the pop-up assembly comprises a positioning groove arranged in the inner wall of the inner cylinder and an annular cavity arranged in the inner cylinder. Due to the fact that the pop-up assembly is arranged, the outer wall of the piston is attached to the inner wall of the sealing ring, the abrasion speed of the piston can be reduced through the arrangement of the sealing ring, the situation that the piston continuously moves upwards to cause serious abrasion, and then the pressurization effect is affected is avoided, the service life of the piston is prolonged, and when the sealing ring is abraded and needs to be replaced, the sealing ring can be replaced conveniently. A user can rotate the limiting bolt firstly, so that the limiting bolt moves out of the cavity and does not limit the sealing cylinder any more, the spring rod extends to push the top ring to move upwards, the top ring can push the sealing cylinder to move upwards, and then the user can take out the sealing cylinder so as to replace the sealing cylinder.

Description

Technical Field

[0001] The utility model relates to the field of calibration tools, in particular to a portable pressure calibration tool. Background Art

[0002] In the original storage logging process, the external pressure of the instrument is measured. When the specified pressure is reached, the battery is started to allow the instrument to work for logging. In order to ensure the normal operation, it is necessary to ensure the measurement accuracy of the pressure sensor and whether it is working normally. Therefore, a calibration tool is needed to calibrate the pressure sensor.

[0003] According to a Chinese patent with publication number CN220206937U, a portable pressure calibration tool is disclosed. During the pressure calibration test of the pressure sensor, the portable pressure calibration tool can change the pressure inside the booster shell by changing the position of the pressurized sealing plug. By observing whether the reading change of the pressure gauge body is the same as the reading change of the pressure sensor, it can be observed whether the pressure detection of the pressure sensor is normal. The calibration tool can calibrate the pressure sensor at the logging site to ensure that the sensor is working normally.

[0004] In view of the above-mentioned disclosed patent content, when the pressure sensor is calibrated and tested by the tool, it is necessary to move the pressurized sealing plug downward and drive the piston downward to squeeze the air inside the booster shell. Since the piston fits tightly with the inner cylinder, the piston will rub against the inner wall of the inner cylinder during the process of moving downward and squeezing the air. Over a long period of time, it is very easy to cause wear of the inner wall of the inner cylinder or the outer wall of the piston, making it difficult for the subsequent piston to fit tightly with the inner wall of the inner cylinder. When the piston moves downward, the air will flow upward through the gap between the inner cylinder and the piston, thereby affecting the pressurization effect and reducing the subsequent calibration and detection effect of the calibration tool. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a portable pressure calibration tool to solve the technical problem that the piston or the inner cylinder is very easy to wear and thus affects the pressurization effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a portable pressure calibration tool, comprising a pressure gauge body and a booster shell, an inner cylinder is provided inside the booster shell, a pop-up assembly is provided inside the inner cylinder, and the pop-up assembly comprises a positioning groove opened on the inner wall of the inner cylinder and an annular cavity opened inside the inner cylinder, a plurality of spring rods are installed inside the annular cavity, and a top ring is installed on the top of the spring rod, a sealing cylinder is inserted into the top of the positioning groove, and a sealing ring is installed on the inner wall of the sealing cylinder.

[0007] By adopting the above technical solution, when the limiting bolt no longer limits the sealing cylinder, the spring rod is extended to push the top ring upward, and the top ring can push the sealing cylinder upward.

[0008] Furthermore, a cavity is provided inside the boost shell, and a pressurized sealing plug is threadedly connected to the upper part of the cavity.

[0009] By adopting the above technical solution, the user can move the pressurized sealing plug by rotating the pressurized sealing plug.

[0010] Furthermore, a piston is installed at the bottom end of the pressurized sealing plug, and the outer wall of the piston is tightly fitted with the inner wall of the sealing ring.

[0011] By adopting the above technical solution, when the pressurized sealing plug rotates and moves downward, it will drive the piston to move downward, so that the piston moves inside the inner cylinder.

[0012] Furthermore, the top end of the top ring is tightly fitted with the sealing cylinder, and the upper part of the outer wall of the sealing cylinder is tightly fitted with the inner wall of the cavity.

[0013] By adopting the above technical solution, the sealing cylinder can cover the top ring to prevent water from penetrating into the annular cavity.

[0014] Furthermore, a pressure connecting pipe is installed at the lower part of the cavity.

[0015] By adopting the above technical solution, it is convenient to connect the pressure connecting pipe to the pressure sensor to be measured.

[0016] Furthermore, a threaded head is installed on one side of the pressure gauge body, and a connecting head is threadedly connected to the outer wall of the threaded head.

[0017] By adopting the above technical solution, when installing the pressure gauge connecting pipe, the connecting head can be screwed onto the outer wall of the threaded head, so that the pressure gauge connecting pipe can be installed.

[0018] Furthermore, a pressure gauge connecting pipe is installed at one end of the connector, and one end of the pressure gauge connecting pipe is threadedly connected to the inside of the boost shell.

[0019] By adopting the above technical solution, it is convenient to install the pressure gauge connecting pipe on the boost housing, and it is also convenient to disassemble the pressure gauge connecting pipe later.

[0020] Furthermore, the pop-up assembly also includes a limiting bolt installed on one side of the boost housing, one end of the limiting bolt extends to the inside of the boost housing, and the bottom of the limiting bolt fits with the top of the sealing cylinder.

[0021] By adopting the above technical solution, the limiting bolt can limit the sealing cylinder, prevent the sealing cylinder from moving upward at will, and improve the sealing performance of the sealing cylinder after installation.

[0022] Furthermore, the top ring is slidably connected to the annular cavity.

[0023] By adopting the above technical solution, the top ring can slide inside the annular cavity, and the spring rod will be squeezed when the top ring moves downward.

[0024] Furthermore, the sealing cylinder is adapted to the positioning groove, and the sealing cylinder is detachably connected to the inner cylinder.

[0025] By adopting the above technical solution, it is convenient to install the sealing cylinder in the inner cylinder, and it is also convenient to take out the sealing cylinder later.

[0026] In summary, the utility model mainly has the following beneficial effects:

[0027] The utility model is provided with a pop-up component, because the outer wall of the piston fits with the inner wall of the sealing ring, the setting of the sealing ring can slow down the wear speed of the piston, avoid the situation that the piston continues to move up and causes serious wear, thereby affecting the pressurization effect, and prolongs the service life of the piston; when the sealing ring is worn and needs to be replaced, the user can first rotate the limit bolt to make the limit bolt move out of the cavity and no longer limit the sealing cylinder, the spring rod is extended to push the top ring to move up, the top ring can push the sealing cylinder to move up, and then the user can replace the sealing ring. The sealing cylinder is taken out, and a new sealing cylinder and sealing ring are pressed into the positioning groove. When pressing in, the sealing cylinder squeezes the spring rod to cause the spring rod to shrink. When the bottom end of the sealing cylinder moves to the bottom of the positioning groove, the limit bolt is turned to screw the limit bolt into the cavity. At this time, the bottom of the limit bolt fits with the top of the sealing cylinder to limit the sealing cylinder and prevent the sealing cylinder from moving at will. In this way, the sealing cylinder and the sealing ring can be quickly disassembled and assembled to replace the sealing ring, avoiding the continued use of the worn sealing ring to affect the pressurization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall front structure of the utility model;

[0029] Figure 2 It is a schematic diagram of the overall front section structure of the utility model;

[0030] Figure 3 This is a schematic diagram of the three-dimensional structure of the pressurized sealing plug of the utility model;

[0031] Figure 4 This is a schematic diagram of the three-dimensional structure of the inner cylinder of the utility model;

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of the inner cylinder of the utility model;

[0033] Figure 6 For the utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0034] In the figure: 1. Pressure gauge body; 2. Threaded head; 3. Connector; 4. Pressure gauge connecting pipe; 5. Booster shell; 6. Cavity; 7. Pressure connecting pipe; 8. Pressurized sealing plug; 9. Pop-up assembly; 901. Annular cavity; 902. Spring rod; 903. Top ring; 904. Sealing cylinder; 905. Sealing ring; 906. Positioning groove; 907. Limit bolt; 10. Inner cylinder; 11. Piston. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0036] The following describes an embodiment of the utility model based on its overall structure.

[0037] Embodiment 1:

[0038] A portable pressure calibration tool, such as Figure 1-Figure 6 As shown, it includes a pressure gauge body 1 and a boosting shell 5, an inner cylinder 10 is provided inside the boosting shell 5, a pop-up assembly 9 is provided inside the inner cylinder 10, a cavity 6 is opened inside the boosting shell 5, and a pressurized sealing plug 8 is threadedly connected to the upper part of the cavity 6, so that the user can move the pressurized sealing plug 8 by rotating the pressurized sealing plug 8, and a piston 11 is installed at the bottom end of the pressurized sealing plug 8, and the outer wall of the piston 11 is tightly fitted with the inner wall of the sealing ring 905. When the pressurized sealing plug 8 rotates and moves downward, it will drive the piston 11 to move downward, so that the piston 11 moves inside the inner cylinder 10, and a pressure connecting pipe 7 is installed at the lower part of the cavity 6 to facilitate the connection of the pressure connecting pipe 7 with the pressure sensor to be measured.

[0039] See also Figure 1-Figure 3 A threaded head 2 is installed on one side of the pressure gauge body 1, and a connecting head 3 is threadedly connected to the outer wall of the threaded head 2. When installing the pressure gauge connecting pipe 4, the connecting head 3 can be screwed on the outer wall of the threaded head 2, so that the pressure gauge connecting pipe 4 can be installed. A pressure gauge connecting pipe 4 is installed on one end of the connecting head 3, and one end of the pressure gauge connecting pipe 4 is threadedly connected to the inside of the boosting shell 5, which is convenient for the pressure gauge connecting pipe 4 to be installed on the boosting shell 5. When the calibration tool needs to be carried, the pressure gauge connecting pipe 4 can be removed from the pressure gauge body 1 and the boosting shell 5, which is convenient for the user to carry. After carrying it to the place of use, the calibration tool can be installed, and the calibration tool is small in size and can be easily carried without being disassembled.

[0040] Specifically, the pop-up component 9 includes a positioning groove 906 opened on the inner wall of the inner tube 10 and an annular cavity 901 opened inside the inner tube 10, and multiple spring rods 902 are installed inside the annular cavity 901, and a top ring 903 is installed on the top of the spring rod 902. When the limiting bolt 907 no longer limits the sealing tube 904, the spring rod 902 extends and can push the top ring 903 to move upward, and the top ring 903 can push the sealing tube 904 to move upward. The sealing tube 904 is inserted into the top of the positioning groove 906, and the sealing tube 904 is adapted to the positioning groove 906. The sealing tube 904 is detachably connected to the inner tube 10, which is convenient for installing the sealing tube 904 in the inner tube 10, and also convenient for subsequent removal of the sealing tube 904.

[0041] Specifically, a sealing ring 905 is installed on the inner wall of the sealing cylinder 904, the top of the top ring 903 fits tightly with the sealing cylinder 904, and the upper part of the outer wall of the sealing cylinder 904 fits tightly with the inner wall of the cavity 6. The sealing cylinder 904 can cover the top ring 903 to prevent water from penetrating into the annular cavity 901. The top ring 903 is slidably connected to the annular cavity 901, and the top ring 903 can slide inside the annular cavity 901, and the spring rod 902 will be squeezed when the top ring 903 moves downward.

[0042] Embodiment 2:

[0043] On the basis of the above-mentioned first embodiment, in order to prevent the sealing cylinder 904 from moving upward and to improve the stability of the sealing cylinder 904, it is necessary to limit the sealing cylinder 904, and thus the following structure is provided.

[0044] See also Figure 2 , Figure 3 and Figure 6 The pop-up assembly 9 also includes a limiting bolt 907 installed on one side of the boost housing 5. One end of the limiting bolt 907 extends to the interior of the boost housing 5. The bottom of the limiting bolt 907 fits with the top of the sealing cylinder 904. The limiting bolt 907 can limit the sealing cylinder 904 to prevent the sealing cylinder 904 from moving up at will, thereby improving the sealing performance of the sealing cylinder 904 after installation.

[0045] The working principle of the utility model is as follows: first, the calibration tool is installed before use, and then the pressure calibration tool can be used to calibrate and detect the pressure sensor. In this process, the pressure connecting pipe 7 needs to be connected to the pressure sensor to be measured, and then the pressurization sealing plug 8 is unscrewed, water is poured into the internal cavity of the boost shell 5, and then the pressurization sealing plug 8 is screwed on. During the movement of the pressurization sealing plug 8 into the inside of the boost shell 5, the piston 11 is driven to move, and the water is squeezed to change the pressure inside the boost shell 5. At this time, the pressurization sealing plug 8 is twisted with an adjustable wrench, so that the reading of the pressure gauge body 1 will change. According to the required pressure or the measured pressure point, the torque of the pressurization sealing plug 8 can be adjusted to change the position of the pressurization sealing plug 8, so that the pressure inside the boost shell 5 changes. At this time, the changes of the pressure sensor to be measured and the pressure gauge body 1 are observed, so that it can be observed whether the pressure detection of the pressure sensor is normal. At this point, the calibration of the pressure sensor by the pressure calibration tool is completed;

[0046] Because the outer wall of the piston 11 fits the inner wall of the sealing ring 905, the wear speed of the piston 11 can be slowed down, and the piston 11 can be prevented from continuously moving upward and causing serious wear. When the sealing ring 905 is worn and needs to be replaced, the pressurized sealing plug 8 is first taken out of the booster housing 5, and then the user can rotate the limiting bolt 907 to move the limiting bolt 907 out of the cavity 6 and no longer limit the sealing cylinder 904. The spring rod 902 is extended to push the top ring 903 upward, and the top ring 903 can push the sealing cylinder 904 upward, and then the user can replace the sealing cylinder 904 is taken out, and then a new sealing cylinder 904 and sealing ring 905 are pressed into the positioning groove 906. When pressed in, the sealing cylinder 904 squeezes the spring rod 902, causing the spring rod 902 to shrink. When the bottom end of the sealing cylinder 904 moves to the bottom of the positioning groove 906, the limiting bolt 907 is turned and the limiting bolt 907 is screwed into the cavity 6. At this time, the bottom of the limiting bolt 907 is in contact with the top of the sealing cylinder 904, so as to limit the sealing cylinder 904 and prevent the sealing cylinder 904 from moving at will. In this way, the installation of the sealing cylinder 904 is completed.

[0047] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A portable pressure calibration tool, comprising a pressure gauge body (1) and a pressure boosting housing (5), characterized in that: An inner cylinder (10) is provided inside the booster housing (5), and an ejection assembly (9) is provided inside the inner cylinder (10). The ejection assembly (9) comprises a positioning groove (906) provided on the inner wall of the inner cylinder (10) and an annular cavity (901) provided inside the inner cylinder (10). A plurality of spring rods (902) are installed inside the annular cavity (901), and a top ring (903) is installed at the top end of the spring rods (902). A sealing cylinder (904) is inserted at the top of the positioning groove (906), and a sealing ring (905) is installed on the inner wall of the sealing cylinder (904).

2. A portable pressure calibration tool according to claim 1, characterized in that: The boost housing (5) has a cavity (6) formed inside, and a pressurized sealing plug (8) is threadedly connected to the upper part of the cavity (6).

3. A portable pressure calibration tool according to claim 2, characterized in that: A piston (11) is installed at the bottom end of the pressurized sealing plug (8), and the outer wall of the piston (11) is tightly fitted with the inner wall of the sealing ring (905).

4. A portable pressure calibration tool according to claim 1, characterized in that: The top end of the top ring (903) is tightly fitted with the sealing cylinder (904), and the upper part of the outer wall of the sealing cylinder (904) is tightly fitted with the inner wall of the cavity (6).

5. A portable pressure calibration tool according to claim 2, characterized in that: A pressure connecting pipe (7) is installed at the lower part of the cavity (6).

6. A portable pressure calibration tool according to claim 1, characterized in that: A threaded head (2) is installed on one side of the pressure gauge body (1), and a connecting head (3) is threadedly connected to the outer wall of the threaded head (2).

7. A portable pressure calibration tool according to claim 6, characterized in that: A pressure gauge connecting pipe (4) is installed at one end of the connecting head (3), and one end of the pressure gauge connecting pipe (4) is threadedly connected to the interior of the boosting shell (5).

8. The portable pressure calibration tool according to claim 1, characterized in that: The pop-up assembly (9) also includes a limiting bolt (907) installed on one side of the boost housing (5), one end of the limiting bolt (907) extends into the interior of the boost housing (5), and the bottom of the limiting bolt (907) fits with the top of the sealing cylinder (904).

9. The portable pressure calibration tool according to claim 1, characterized in that: The top ring (903) is slidably connected to the annular cavity (901).

10. The portable pressure calibration tool according to claim 1, characterized in that: The sealing cylinder (904) is adapted to the positioning groove (906), and the sealing cylinder (904) is detachably connected to the inner cylinder (10).

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