A high-precision digital pressure gauge

Abstract

The present invention provides a high-precision digital pressure gauge, which relates to the technical field of pressure gauges, including a digital pressure gauge body, a gauge body connector at the lower end of the digital pressure gauge body, a bent pipe at the lower end of the gauge body connector, the bent pipe is a metal hose, an expansion adjustment structure is provided on the circumferential surface of the gauge body connector, the expansion adjustment structure includes a U-shaped plate, a rotating shaft is rotatably installed inside the U-shaped plate, the rotating shaft is partially exposed outside the digital pressure gauge body, a thick disc is fixedly installed on the circumferential surface of the rotating shaft, a plurality of through grooves are penetrated inside the thick disc, and limiting grooves are symmetrically provided on the side walls of each through groove, a first thin disc is fixedly installed on the circumferential surface of the rotating shaft, and a second thin disc is symmetrically fixedly installed on the circumferential surface of the rotating shaft, and the structure and layout of the digital pressure gauge body are optimized and the expansion adjustment structure is provided, so that the overall structure of the structure is installed on the outside of the gauge body connector, the modification cost is low, it is conducive to promotion, and it is more practical.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure gauges, and more specifically, particularly relates to a high-precision digital pressure gauge. Background Art

[0002] A digital pressure gauge is usually composed of multiple components such as a pressure gauge, an elbow, and connecting pipes. It is a device specifically used to measure pressure. The main function of this device is to display the pressure value in digital form. When measuring pressure, the digital pressure gauge will sense the pressure through a sensor and convert it into an electrical signal for processing and display to obtain the pressure value. The elbow plays a very important role in the digital pressure gauge. It can help adjust the fluid pressure distribution in the pipeline so that the fluid pressure entering the pressure gauge can be more uniform. In this way, the impact of unstable fluid flow on pressure measurement can be effectively reduced, thereby improving the measurement accuracy and reliability of the digital pressure gauge.

[0003] 1. When measuring, the existing pressure gauge usually uses a bend pipe for buffering in order to reduce the impact of unstable fluid flow on the pressure gauge measurement. The bend pipe on the existing digital pressure gauge is generally designed with a specific size according to the range threshold of the digital pressure gauge. Since different types of media or different types of media often have different internal densities, the existing bend pipe often cannot be further adjusted according to the density of different types of media or different types of media, which leads to insufficient accuracy of the pressure gauge detection and the practicality needs to be improved;

[0004] 2. In order to reduce the impact of unstable fluid flow on pressure gauge measurement, existing pressure gauges usually use elbows for buffering. Existing elbows are generally made of hard metal. Once the bending degree is determined, it cannot be adjusted, which makes the subsequent replacement cost high and the practicality is insufficient, which needs to be improved;

[0005] 3. In order to reduce the impact of unstable fluid flow on pressure gauge measurement, existing pressure gauges usually use curved pipes for buffering. Existing curved pipes are generally made of hard metal. Once the degree of bending is determined, it cannot be adjusted. It is difficult to apply pressure gauges with different air pressure thresholds. The practicality is insufficient and needs to be improved.

[0006] Therefore, in view of this, the existing structure and deficiencies are studied and improved, and a high-precision digital pressure gauge is provided to achieve a more practical purpose. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a high-precision digital pressure gauge to solve the above problems.

[0008] A high-precision digital pressure gauge comprises a digital pressure gauge body, a gauge body connector is provided at the lower end of the digital pressure gauge body, a bend is provided at the lower end of the gauge body connector, and the bend is a metal hose;

[0009] The circumferential surface of the meter body connector is provided with an expansion adjustment structure;

[0010] The expansion adjustment structure includes a U-shaped plate, a rotating shaft is rotatably installed inside the U-shaped plate, and the rotating shaft is partially exposed outside the digital pressure gauge body. A thick disc is fixedly installed on the circumferential surface of the rotating shaft, and a plurality of through grooves are opened through the inside of the thick disc. Limiting grooves are symmetrically opened on the side walls of each through groove. A first thin disc is fixedly installed on the circumferential surface of the rotating shaft, and a second thin disc is symmetrically fixedly installed on the circumferential surface of the rotating shaft. The thick disc and the first thin disc are located between the second thin disc, and the diameters of the first thin disc and the second thin disc are smaller than the diameter of the thick disc. A plurality of arc grooves are opened through the inside of the first thin disc and the second thin disc.

[0011] Preferably, a connecting pipe is provided at the lower end of the bent pipe, and a plurality of connecting rods are symmetrically fixedly installed on the side wall of the thick disc, each of the connecting rods is fixedly installed on the U-shaped plate, a limiting block is slidably installed inside each limiting groove, and a first slider is fixedly installed between each of the limiting blocks, each of the first sliders is located inside the through groove, and each of the first sliders is slidably installed on the through groove.

[0012] Preferably, a first step transmission member is rotatably mounted on the side wall of each of the first sliders, each of the first step transmission members is slidably mounted inside the arc groove of the first thin disc, a plurality of square grooves are symmetrically opened on the inner wall of the U-shaped plate, and a second slider is slidably mounted inside each of the square grooves.

[0013] Preferably, a second step transmission member is rotatably mounted on the side wall of each second slider, each second step transmission member is slidably mounted on the arc groove in the second thin disc, an expansion plate is fixedly mounted between each of the second sliders, each expansion plate is fixedly mounted on the first slider, and the bent pipe is adapted to the expansion plate.

[0014] Preferably, a worm gear is fixedly mounted on the circumferential surface of the rotating shaft, and the worm gear is located outside the digital pressure gauge body. Fixed plates are symmetrically fixedly mounted on the side walls of the digital pressure gauge body, and a worm is rotatably mounted between the two fixed plates. The worm and the worm wheel are on the same side, and the worm and the worm wheel are meshingly mounted.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present invention, when the first thin disc rotates, the first thin disc will drive the arc groove to rotate. Since the first slider in the thick disc is limited by the through groove, the first thin disc will drive the arc groove to rotate, so that the arc groove generates a radial force on the first step transmission member, so that the first step transmission member drives the first slider to slide in a straight line from the inside of the through groove to the outside of the thick disc, and then each expansion plate can be synchronously supported to move toward the outside of the thick disc, so that the bending degree of the elbow can be further expanded to complete fine adjustment, and then the bending degree of the elbow can be controlled according to the characteristics of the medium, so that the elbow can be fine-tuned according to the situation when the fluid passes through the elbow, and the pressure distribution and flow stability of the fluid in the elbow can be controlled, so as to improve the accuracy and practicality of the measurement of the digital pressure gauge body;

[0017] In the present invention, by arranging the second thin discs at the two sides of the rotating shaft, when the rotating shaft rotates, the second thin disc and the first thin disc are driven to rotate synchronously, so that the arc groove on the second thin disc rotates, and then a radial force is generated on the second step transmission member, driving the second slider to move, so that the first slider and the second slider synchronously support the expansion plate, thereby ensuring that multiple positions of the expansion plate can be supported, avoiding deformation of some positions of the expansion plate and causing the bent pipe to be unable to be fully bent, thereby improving reliability, and at the same time;

[0018] In the present invention, by increasing the size of the expansion plate to between the second sliders, since the bending angle of the elbow connected to the meter body connector on the digital pressure gauge body is determined according to the fluid characteristics and system requirements, the installation environment and space limitations, the elbow can be wound on the expansion plate for synchronous expansion even when the number of bending circles is large. At the same time, since the expansion plate is adjusted by using a worm and a worm gear to control the rotation amplitude of the arc groove on the first thin disc and the second thin disc, the expansion amplitude of the expansion plate is in stepless adjustment, which greatly increases the applicability of the expansion plate to fine-tune the elbow.

[0019] In the present invention, by providing the limiting groove and the through groove, when the first slider drives the expansion plate to expand, the limiting block will be driven to slide in the limiting groove together, and when the second slider drives the expansion plate to expand, the second slider will slide inside the square groove, so that multiple limiting can be performed, thereby increasing the stability of each expansion plate when expanding;

[0020] In the present invention, the worm and the worm wheel are meshed and the rotating shaft is driven to rotate, so that the rotating shaft can realize self-locking by the meshing structure of the worm and the worm wheel, thereby avoiding the change of the adjusted expansion plate, which causes the change of the bent pipe, and thus avoiding the change of the detection accuracy of the digital pressure gauge body, thereby improving reliability;

[0021] In the present invention, by optimizing the structure and layout of the digital pressure gauge body and providing an expansion adjustment structure, the overall structure of the structure is installed outside the gauge body connector, which has a low modification cost, is conducive to promotion, and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional explosion structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the explosion structure of the digital pressure gauge body connection of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the U-shaped plate of the present invention;

[0026] Figure 5 is a cross-sectional view of a U-shaped plate of the present invention;

[0027] Figure 6 yes Figure 5 A in the enlarged view;

[0028] Figure 7 It is a schematic diagram of the U-shaped plate connection explosion structure of the present invention;

[0029] Figure 8 is a cross-sectional view of a square groove of the present invention;

[0030] Fig. 9 is a cross-sectional view of the rotating shaft of the present invention;

[0031] Fig.10 It is a schematic diagram of the expansion plate connection explosion structure of the present invention;

[0032] Fig.11 It is a schematic diagram of the first slider connection explosion structure of the present invention;

[0033] Fig.12 It is a schematic diagram of the thick disc connection explosion structure of the present invention.

[0034] In the figure, the correspondence between the component names and the figure numbers is: 11, digital pressure gauge body; 12, gauge body connector; 13, elbow; 14, connecting pipe; 15, U-shaped plate; 16, rotating shaft; 17, worm gear; 18, fixed plate; 19, worm; 21, thick disc; 22, through groove; 23, limit groove; 24, first thin disc; 25, second thin disc; 26, arc groove; 27, connecting rod; 28, limit block; 29, first slider; 31, first step transmission member; 32, square groove; 33, second slider; 34, second step transmission member; 35, expansion plate. DETAILED DESCRIPTION

[0035] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] See also Figure 1 - Fig.12 The present invention provides a high-precision digital pressure gauge, including a digital pressure gauge body 11, a gauge body connector 12 is provided at the lower end of the digital pressure gauge body 11, a bend 13 is provided at the lower end of the gauge body connector 12, and the bend 13 is a metal hose (a metal hose is a flexible pipe made of metal material, mainly used to transmit various fluids including gas and liquid or as a part of a mechanical structure, it is composed of a metal braided layer and an inner lining layer, and has good flexibility, pressure resistance and temperature resistance);

[0037] The circumferential surface of the meter body connector 12 is provided with an expansion adjustment structure;

[0038] The expansion adjustment structure includes a U-shaped plate 15, and a rotating shaft 16 is rotatably installed inside the U-shaped plate 15. The rotating shaft 16 is partially exposed outside the digital pressure gauge body 11. By optimizing the structure and layout of the digital pressure gauge body 11, an expansion adjustment structure is set up so that the overall structure of the structure is installed on the outside of the meter body connector 12. The modification cost is low, which is conducive to promotion and more practical.

[0039] A thick disc 21 is fixedly mounted on the circumferential surface of the rotating shaft 16, and a plurality of through grooves 22 are opened inside the thick disc 21, and a limiting groove 23 is symmetrically opened on the side wall of each through groove 22. A first thin disc 24 is fixedly mounted on the circumferential surface of the rotating shaft 16, and a second thin disc 25 is symmetrically fixedly mounted on the circumferential surface of the rotating shaft 16. The thick disc 21 and the first thin disc 24 are located between the second thin disc 25, and the diameters of the first thin disc 24 and the second thin disc 25 are smaller than the diameter of the thick disc 21. A plurality of arc grooves 26 are opened inside the first thin disc 24 and the second thin disc 25, and a connecting pipe 14 is provided at the lower end of the bent pipe 13. A plurality of connecting rods 27 are symmetrically fixedly mounted on the side wall of the thick disc 21, and each connecting rod 27 is fixedly mounted on the U-shaped plate 15. When the first thin disc 24 rotates, the first thin disc 24 will drive the arc groove 26 to rotate. Since the first slider 29 in the thick disc 21 is limited by the through groove 22, the first thin disc 24 will drive the arc groove 26 to rotate, so that the arc groove 26 generates a radial force on the first step transmission member 31, so that the first step transmission member 31 drives the first slider 29 to slide in a straight line from the inside of the through groove 22 to the outside of the thick disc 21, and then each expansion plate 35 can be synchronously supported to move toward the outside of the thick disc 21, so that the bending degree of the elbow 13 can be further expanded to complete fine-tuning, and then the bending degree of the elbow 13 can be controlled according to the characteristics of the medium, so that the elbow 13 can be fine-tuned according to the situation when the medium fluid passes through the elbow 13, and the pressure distribution and flow stability of the fluid in the elbow 13 can be controlled, thereby improving the measurement accuracy and practicality of the digital pressure gauge body 11.

[0040] A limiting block 28 is slidably installed inside each limiting groove 23, and a first slider 29 is fixedly installed between each limiting block 28. Each first slider 29 is located inside the through groove 22, and each first slider 29 is slidably installed with the through groove 22. A first step transmission member 31 is rotatably installed on the side wall of each first slider 29, and each first step transmission member 31 is located inside the arc groove 26 of the first thin disc 24 and is slidably installed. A plurality of square grooves 32 are symmetrically provided on the inner wall of the U-shaped plate 15, and a second slider 33 is slidably installed inside each square groove 32. By setting the limiting grooves 23 and the through grooves 22, when the first slider 29 drives the expansion plate 35 to expand, the limiting block 28 will be driven to slide in the limiting groove 23 together, and when the second slider 33 drives the expansion plate 35 to expand, the second slider 33 will slide inside the square groove 32, so that multi-directional limiting can be performed, thereby increasing the stability of each expansion plate 35 when expanding.

[0041] A second step transmission member 34 is rotatably mounted on the side wall of each second slider 33, and each second step transmission member 34 is slidably mounted in the arc groove 26 in the second thin disc 25. An expansion plate 35 is fixedly mounted between each second slider 33, and each expansion plate 35 is fixedly mounted on the first slider 29. The bent pipe 13 is adapted to the expansion plate 35 (the bent pipe 13 is wound in the expansion plate 35 in a ring form). By arranging the second thin discs 25 at both sides of the rotating shaft 16, when the rotating shaft 16 rotates, the second thin disc 25 and the first thin disc 24 will be driven to rotate synchronously, so that the arc groove 26 on the second thin disc 25 rotates, thereby generating a radial force on the second step transmission member 34, driving the second slider 33 to move, so that the first slider 29 and the second slider 33 synchronously support the expansion plate 35, thereby ensuring that multiple positions of the expansion plate 35 can be supported, avoiding deformation of some positions of the expansion plate 35, which causes the bent pipe 13 to be unable to fully bend, and improving reliability.

[0042] A worm gear 17 is fixedly mounted on the circumferential surface of the rotating shaft 16. The worm gear 17 is located outside the digital pressure gauge body 11. A fixing plate 18 is symmetrically fixedly mounted on the side wall of the digital pressure gauge body 11. A worm 19 is rotatably mounted between the two fixing plates 18. The worm 19 is on the same side as the worm gear 17. The worm 19 and the worm gear 17 are meshed and mounted. By using the worm 19 to mesh with the worm gear 17 and driving the rotating shaft 16 to rotate, the rotating shaft 16 can achieve self-locking by using the meshing structure of the worm 19 and the worm gear 17, thereby avoiding changes in the adjusted expansion plate 35, which causes changes in the elbow 13, thereby avoiding changes in the detection accuracy of the digital pressure gauge body 11, improving reliability, and by The size of the expansion plate 35 is increased to between the second slider 33. Since the bending angle of the elbow 13 connected to the body connector 12 on the digital pressure gauge body 11 is determined according to the fluid characteristics and system requirements, the installation environment and space limitations, the elbow 13 can be wound around the expansion plate 35 for synchronous expansion even when the number of bending circles is large. At the same time, since the worm 19 and the worm gear 17 control the rotating shaft 16 to drive the rotation amplitude of the arc groove 26 on the first thin disc 24 and the second thin disc 25 to adjust the expansion plate 35, the expansion amplitude of the expansion plate 35 is in stepless adjustment, which greatly increases the applicability of the expansion plate 35 to fine-tune the elbow 13.

[0043] Working principle:

[0044] In the first step, when the staff needs to control the bending degree of the curved tube 13 wound on the surface of the expansion plate 35, the staff can rotate the worm 19 to engage with the worm wheel 17 to drive the rotating shaft 16 to rotate;

[0045] When in use, the staff can first control the bending degree of the bent pipe 13 according to the medium characteristics detected by the digital pressure gauge body 11. The staff can first insert a flat-blade screwdriver into the screw head of the worm 19 and rotate it, so that the flat-blade screwdriver generates a radial force to drive the worm 19 to rotate between the fixed plates 18, so that the worm 19 is meshed with the worm wheel 17, so that the worm wheel 17 will generate a radial force to drive the rotating shaft 16 to rotate, and then the rotating shaft 16 drives the first thin disk 24 to rotate.

[0046] In the second step, when the rotating shaft 16 rotates, it will drive the first thin disc 24 to rotate, so that the arc groove 26 rotates, and then the first slider 29 drives the expansion plate 35 to move outward, thereby controlling the bending amplitude of the curved tube 13;

[0047] When the first thin disk 24 rotates, since the first slider 29 in the thick disk 21 is limited by the through groove 22, and the first step transmission member 31 on the first slider 29 is located inside the arc groove 26 of the first thin disk 24, when the first thin disk 24 rotates, the first thin disk 24 will drive the arc groove 26 to rotate, so that the arc groove 26 generates a radial force on the first step transmission member 31, so that the first step transmission member 31 drives the first slider 29 to slide in a straight line from the inside of the through groove 22 to the outside of the thick disk 21, and at the same time, the sliding of the first slider 29 will drive the limit block 28 to slide in the limit groove 23, thereby providing certain support for the first slider 29, so that each first slider 29 drives the expansion plate 35 to move toward the outside of the thick disk 21, so that the bending degree of the bent pipe 13 can be further expanded to complete fine-tuning.

[0048] Step 3: When the rotating shaft 16 rotates, the rotating shaft 16 will drive the second thin disc 25 to rotate synchronously, thereby generating a radial force on the second step transmission member 34, and synchronously driving the expansion plate 35 to move synchronously;

[0049] When the rotating shaft 16 rotates, the rotating shaft 16 will drive the second thin disc 25 to rotate synchronously, thereby causing the second thin disc 25 and the first thin disc 24 to rotate synchronously. The rotation of the second thin disc 25 will cause the arc groove 26 on the second thin disc 25 to rotate, thereby generating a radial force on the second step transmission member 34, and limiting the second slider 33 through the square groove 32, so that the second step transmission member 34 drives the second slider 33 to slide inside the square groove 32, so that the second thin disc 25 can drive the second slider 33 to synchronously expand the expansion plate 35.

[0050] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A high-precision digital pressure gauge, comprising a digital pressure gauge body (11), wherein a gauge body connector (12) is provided at the lower end of the digital pressure gauge body (11), characterized in that: A bent pipe (13) is provided at the lower end of the meter body connector (12), and the bent pipe (13) is a metal hose; The circumferential surface of the meter body connector (12) is provided with an expansion adjustment structure; The expansion adjustment structure comprises a U-shaped plate (15), a rotating shaft (16) is rotatably mounted inside the U-shaped plate (15), a portion of the rotating shaft (16) is exposed outside the digital pressure gauge body (11), a thick disc (21) is fixedly mounted on the circumferential surface of the rotating shaft (16), a plurality of through grooves (22) are penetrated inside the thick disc (21), and a limiting groove (23) is symmetrically arranged on the side wall of each through groove (22), a first thin disc (24) is fixedly mounted on the circumferential surface of the rotating shaft (16), a second thin disc (25) is symmetrically fixedly mounted on the circumferential surface of the rotating shaft (16), and a plurality of arc grooves (26) are penetrated inside the first thin disc (24) and the second thin disc (25); A limiting block (28) is slidably mounted inside each of the limiting grooves (23); A first sliding block (29) is fixedly mounted between each of the limit blocks (28), each of the first sliding blocks (29) is located inside the through slot (22), and each of the first sliding blocks (29) is slidably mounted with the through slot (22); A first step transmission member (31) is rotatably mounted on the side wall of each of the first sliding blocks (29), and each of the first step transmission members (31) is slidably mounted inside the arc-shaped groove (26) of the first thin disc (24); The inner wall of the U-shaped plate (15) is symmetrically provided with a plurality of square grooves (32), and a second sliding block (33) is slidably mounted inside each of the square grooves (32); A second step transmission member (34) is rotatably mounted on the side wall of each second sliding block (33), and each second step transmission member (34) is slidably mounted on the arc groove (26) in the second thin disc (25).

2. A high-precision digital pressure gauge as claimed in claim 1, characterized in that: A connecting pipe (14) is provided at the lower end of the curved pipe (13), and a plurality of connecting rods (27) are symmetrically fixedly mounted on the side wall of the thick disc (21).

3. A high-precision digital pressure gauge as claimed in claim 2, characterized in that: Each of the connecting rods (27) is fixedly mounted on the U-shaped plate (15).

4. A high-precision digital pressure gauge as claimed in claim 3, characterized in that: An expansion plate (35) is fixedly mounted between each of the second sliders (33), each of the expansion plates (35) is fixedly mounted on the first slider (29), and the bent pipe (13) is compatible with the expansion plate (35).

5. A high-precision digital pressure gauge as claimed in claim 4, characterized in that: A worm gear (17) is fixedly mounted on the circumferential surface of the rotating shaft (16); the worm gear (17) is located outside the digital pressure gauge body (11); and a fixing plate (18) is symmetrically fixedly mounted on the side wall of the digital pressure gauge body (11).

6. A high-precision digital pressure gauge as claimed in claim 5, characterized in that: A worm (19) is rotatably mounted between the two fixing plates (18); the worm (19) is on the same side as the worm wheel (17); and the worm (19) and the worm wheel (17) are meshingly mounted.

Images