Gas piston type pressure gauge

Abstract

The utility model relates to the technical field of pressure gauges, in particular to a gas piston type pressure gauge, which comprises a pressure gauge body, the upper end of the pressure gauge body is provided with a weight placing structure and a plurality of pressure gauge joints, one side of each pressure gauge joint is provided with a protective piece, and the protective piece is arranged in a rotatable adjusting mode. The weight placing structure comprises a piston column and a connecting cylinder arranged on the outer side of the piston column, the connecting cylinder is in matched butt joint with the end of the measuring piston in the piston column, the bottom end of the connecting cylinder is fixedly connected with a weight tray, and a plurality of limiting grooves are formed in the inner side of the connecting cylinder. According to the pressure gauge connector protection device, the protection piece is arranged, the upper end of the pressure gauge connector is protected through the protection piece, the situation that the measurement result is affected due to the fact that the connector is polluted can be avoided, and meanwhile it is avoided that extra time and energy need to be spent on cleaning and maintaining the connector.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure gauges, in particular to a gas piston pressure gauge. Background Art

[0002] A gas piston pressure gauge is a high-precision pressure measuring instrument widely used in industries such as industry and laboratories. Its operating principle is based on Pascal's law, determining the measured pressure value by the equilibrium state of the gas piston. The piston cylinder in a gas piston pressure gauge is pre-filled with gas, and the piston rod is coaxially connected to the cross-handwheel, making operation more convenient. The pressure chamber of the piston cylinder is designed with multiple air paths, which are connected to components such as the preload pump and the gauge seat stop valve to achieve pressure transmission and regulation. In addition, the upper surface of the piston cylinder is usually designed as a weight loading tray to facilitate pressure calibration and adjustment. Compared with traditional liquid piston pressure gauges, gas piston pressure gauges have a cleaner working medium and do not require oil lubrication, resulting in lower maintenance costs. They also provide highly sensitive measurement equipment calibration, and the calibration process is relatively simplified, which can greatly shorten working time.

[0003] However, the piston pressure gauge in the existing technology has extremely high requirements for the cleanliness of the joint when measuring the pressure of the test piece. Since the measurement accuracy of the piston pressure gauge is greatly affected by impurities or contaminants, once there is dirt at the joint, it may cause deviations in the measurement results, affecting the accuracy and reliability of the measurement.

[0004] The piston pressure gauges in the existing technology generally lack effective protective components at the joints, which makes the joints susceptible to contamination by external factors such as dust and oil during transportation, installation and use. In this case, users have to spend extra time and energy to clean and maintain the joints, which not only increases the difficulty of operation but also reduces work efficiency. In addition, frequent cleaning operations may cause wear on the joints, further affecting measurement accuracy and service life.

[0005] Therefore, a gas piston pressure gauge is needed to improve the above problems. Utility Model Content

[0006] The purpose of the present utility model is to provide a gas piston pressure gauge to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A gas piston pressure gauge comprises a pressure gauge body, wherein the upper end of the pressure gauge body is provided with a weight placement structure and several pressure gauge joints, and a protective member is provided on one side of each pressure gauge joint, and the protective member is rotatably adjustable; the weight placement structure comprises a piston column and a connecting cylinder arranged on the outside thereof, the connecting cylinder cooperates with the end of the measuring piston in the piston column, and the bottom end of the connecting cylinder is fixedly connected to the weight tray, the inner side of the connecting cylinder is provided with several limit grooves, and the outer side of the piston column is fixedly connected with several limit bars that cooperate with the limit grooves.

[0009] As a preferred solution of the present invention, the limiting grooves and the limiting bars are both arranged in a circular array, and the limiting bars are limitedly inserted into the limiting grooves.

[0010] As a preferred solution of the present invention, the protective member includes a telescopic column, the upper end of the telescopic column is connected to a connecting rod, and one side of the connecting rod is fixedly connected to a protective cover.

[0011] As a preferred solution of the present invention, the protective cover is mated with the top end of the pressure gauge connector, and a sealing member is provided inside the protective cover.

[0012] As a preferred solution of the present invention, adjustment feet are provided around the lower end of the pressure gauge body.

[0013] As a preferred solution of the present invention, a hand wheel is provided at the front end of the pressure gauge body, and a stop valve and a pre-pressure pump are respectively provided on one side of the pressure gauge body.

[0014] As a preferred solution of the present invention, a display screen is provided at the front end of the pressure gauge body.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model is provided with a protective member, which protects the upper end of the pressure gauge joint, thereby preventing the joint from being contaminated and affecting the measurement result, and avoiding the need to spend extra time and energy on cleaning and maintenance of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a first-perspective stereogram of the present invention;

[0018] Figure 2 This is a second perspective stereogram of the present invention;

[0019] Figure 3 This is a third perspective stereogram of the present invention;

[0020] Figure 4 For this utility model Figure 1Enlarged view of point A in the middle;

[0021] Figure 5 For this utility model Figure 3 Enlarged view of point B in the middle.

[0022] In the figure: pressure gauge body 1, connecting cylinder 2, pressure gauge connector 3, handwheel 4, stop valve 5, pre-pressure pump 6, adjustment foot 7, weight tray 8, display screen 9, limit bar 10, limit slot 11, telescopic column 12, connecting rod 13, protective cover 14. DETAILED DESCRIPTION

[0023] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to related disclosures. Several embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] See also Figure 1-5 , the utility model provides a technical solution:

[0028] For example, please refer to Figure 1 、 2, 3, 4 and 5, a gas piston pressure gauge, comprising a pressure gauge body 1, the upper end of the pressure gauge body 1 is provided with a weight placement structure and a plurality of pressure gauge joints 3, each pressure gauge joint 3 is provided with a protective member on one side, and the protective member is rotatably adjustable; the weight placement structure comprises a piston column and a connecting cylinder 2 arranged on the outside thereof, the connecting cylinder 2 is mated with the end of the measuring piston in the piston column, and the bottom end of the connecting cylinder 2 is fixedly connected with a weight tray 8, a plurality of limit grooves 11 are provided on the inner side of the connecting cylinder 2, and a plurality of limit bars 10 that are mated with the limit grooves 11 are fixedly connected to the outer side of the piston column, the limit grooves 11 and the limit bars 10 are arranged in a circular array, and the limit bars 10 are limitedly inserted into the inside of the limit grooves 11.

[0029] A protective member is provided on one side of the pressure gauge connector 3. The provision of the protective member protects the top of the pressure gauge connector 3 to prevent contamination from affecting the measurement results and also ensures that contamination is avoided during transportation and installation.

[0030] The cooperation between the limiting strip 10 and the limiting groove 11 limits the connection cylinder 2 during use. When the weight is placed, the connection cylinder 2 can only be displaced in the vertical direction and cannot rotate, thereby ensuring the stability of the structure.

[0031] Please refer to Figure 1 、 2 , 3, 4 and 5, the protective part includes a telescopic column 12, the upper end of the telescopic column 12 is connected to a connecting rod 13, and one side of the connecting rod 13 is fixedly connected to a protective cover 14, the protective cover 14 is docked with the top end of the pressure gauge connector 3, and a seal is provided inside the protective cover 14.

[0032] The protective cover 14 seals the top of the pressure gauge connector 3 to prevent dust or other debris from contaminating the top of the pressure gauge connector 3 .

[0033] Adjustment feet 7 are provided around the lower end of the pressure gauge body 1, a hand wheel 4 is provided at the front end of the pressure gauge body 1, and a stop valve 5 and a pre-pressure pump 6 are provided on one side of the pressure gauge body 1, and a display screen 9 is provided at the front end of the pressure gauge body 1.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas piston pressure gauge, comprising a pressure gauge body (1), wherein the upper end of the pressure gauge body (1) is provided with a weight placement structure and a plurality of pressure gauge connectors (3), characterized in that: A protective piece is provided on one side of each pressure gauge joint (3), and the protective piece is rotatably adjustable; The weight placement structure comprises a piston column and a connecting cylinder (2) arranged on the outside thereof, the connecting cylinder (2) is mated with the end of the measuring piston in the piston column, and the bottom end of the connecting cylinder (2) is fixedly connected to a weight tray (8), the inner side of the connecting cylinder (2) is provided with a plurality of limiting grooves (11), and the outer side of the piston column is fixedly connected with a plurality of limiting strips (10) that are mated with the limiting grooves (11).

2. The gas piston pressure gauge according to claim 1, characterized in that: The limiting grooves (11) and the limiting strips (10) are both arranged in a circular array, and the limiting strips (10) are inserted into the limiting grooves (11) for limiting purposes.

3. The gas piston pressure gauge according to claim 1 or 2, characterized in that: The protective member comprises a telescopic column (12), the upper end of the telescopic column (12) is connected to a connecting rod (13), and one side of the connecting rod (13) is fixedly connected to a protective cover (14).

4. The gas piston pressure gauge according to claim 3, characterized in that: The protective cover (14) is mated with the top end of the pressure gauge connector (3), and a sealing member is provided inside the protective cover (14).

5. The gas piston pressure gauge according to claim 4, characterized in that: Adjustment feet (7) are provided around the lower end of the pressure gauge body (1).

6. The gas piston pressure gauge according to claim 5, characterized in that: A hand wheel (4) is provided at the front end of the pressure gauge body (1), and a stop valve (5) and a pre-pressure pump (6) are respectively provided on one side of the pressure gauge body (1).

7. The gas piston pressure gauge according to claim 6, characterized in that: A display screen (9) is provided at the front end of the pressure gauge body (1).

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