Pressure instrument

Abstract

The utility model relates to a pressure instrument which comprises a pressure gauge shell structure and a pressure transmission structure, a movement gear structure capable of improving dynamic response and improving stability and measurement accuracy is installed in the pressure gauge shell structure, and the movement gear structure is connected with a pressure transmission structure. The movement gear structure comprises an installation structure, a pressure transmission structure and a rotating structure, the rotating structure is installed on the installation structure, and the pressure transmission structure comprises a Bourdon tube, a tube end connector and a connecting rod. Two groups of pipe end connectors are arranged at the arc-shaped end part of the Bourdon pipe, and connecting rods are movably mounted on the side surfaces of the pipe end connectors. According to the utility model, the problems that a single group of connecting rods of the existing pressure instrument are unstable during transmission under the condition of high pressure, a coil spring cannot accurately return to an original position after a long time, and numerical value reading is inaccurate due to abrasion caused by the connection relation between a sector gear and a gear are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure instruments and meters, in particular to a pressure meter. Background Art

[0002] A pressure instrument, also known as a pressure measuring instrument, pressure gauge, or manometer, is an industrial automation instrument used to measure gas or liquid pressure. It typically operates based on the principles of fluid mechanics, converting pressure into mechanical displacement, which is then displayed via a pointer or digital display. While different types of pressure instruments operate differently, they generally utilize a Baden tube, connecting rod, coil spring, or other device to drive the pointer, facilitating user observation.

[0003] However, this type of pressure gauge presents several issues. Over extended use, the single connecting rod connection can reduce the overall stability of the system. Under high pressure or complex operating conditions, this connection can be more susceptible to external interference, such as vibration and shock, leading to transmission failure or increased errors. The coil spring's reset stability can also be affected after extended use. If the coil spring's reset force is unstable or changes, it may not accurately return to its original state, affecting the pressure gauge's measurement accuracy. Furthermore, the sector gear and gear transmission can wear over time, potentially causing inaccurate pressure readings.

[0004] Therefore, in order to solve the above technical problems, improve the accuracy of pressure value detection, improve the stability between internal structure connections, and realize a relatively stable pressure instrument, a pressure instrument is hereby proposed to solve the above technical problems. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a pressure meter that solves the problems of unstable transmission of a single connecting rod in the existing pressure meter under high pressure, and the inability of the coil spring to accurately return to its original position after a long time. Secondly, the connection relationship between the sector gear and the gear alone causes inaccurate numerical readings after wear.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressure instrument comprising a pressure gauge housing structure and a pressure transmission structure. A movement gear structure capable of improving dynamic response, stability, and measurement accuracy is installed within the pressure gauge housing structure. The movement gear structure is connected to a pressure transmission structure. The movement gear structure comprises a mounting structure, a pressure transmission structure, and a rotating structure. The rotating structure is mounted on the mounting structure. The pressure transmission structure comprises a Baden tube, a tube end connector, and a connecting rod. Two sets of tube end connectors are provided at the curved end of the Baden tube. Connecting rods are movably mounted on the side surfaces of the tube end connectors. A shaft is connected between the lower ends of the two sets of connecting rods. The surface of the shaft is connected to the rotating structure. A set of movable columns is mounted on the mounting structure. The rotating structure comprises a sector gear and a gear column. The gear column extends through the mounting structure. The movable column extends through the mounting structure. Small gears are provided at the ends of the movable column and the gear column. A toothed belt is provided between the two sets of small gears. A sector gear is fixedly mounted on the surface of the movable column. The sector gear and the gear column form a gear transmission. Two sets of coil springs are provided on the surface of the gear column.

[0007] Through the above technical solution, further, the mounting structure includes a mounting plate, a first connecting column, a second connecting column, and a movable column; the mounting plate is installed in the pressure gauge housing structure, and the first connecting column, the second connecting column and the rotatable movable column are respectively installed on the surface of the mounting plate, and an end connecting plate is connected to the end of the first connecting column and the second connecting column, and its fan gear is fixedly installed on the surface of the movable column.

[0008] Furthermore, a fan-shaped opening is provided on the surface of the sector gear, and the fan-shaped opening contacts the surface of the second connecting column, and the lower ends of the two groups of connecting rods are connected to the lower end of the sector gear through shaft connections.

[0009] As a preferred technical solution, a clamping wheel is installed on the surface of the end connecting plate. The clamping wheel is composed of two sets of shafts, and its toothed belt passes between the two sets of shafts.

[0010] Furthermore, the pressure transmission structure includes a joint and a threaded joint; the joint is installed on the pressure gauge housing structure, the threaded joint is installed at the lower end of the joint, and the Baden tube is connected to the joint.

[0011] As a preferred technical solution, the pressure gauge housing structure includes a case, a frame, bolts, and a plate; the frame is installed on the front end face of the case by bolts, and a plate is provided inside the case, the joint of which is installed at the lower end of the case, the gear column passes through the plate, and a pointer is installed at the front end of the gear column.

[0012] Compared with the prior art, the present invention provides a pressure gauge with the following beneficial effects:

[0013] 1. This pressure gauge uses two sets of connecting rods, specifically, the shafts at the bottom of the two sets of connecting rods are directly connected to the sector gear. When the Baden tube is pressed down under pressure, the force can be transmitted to the sector gear more evenly, preventing the one-way deviation of the transmission force of the single set of gears from causing unstable transmission of the sector gear. Secondly, the two sets of connecting rods can improve the stability of operation. Secondly, when the sector gear drives the movable column to rotate, the gear column can be synchronously driven to rotate through the action of the toothed belt. This purpose can better ensure the stability of the synchronous transmission and greatly improve the accuracy of the pressure detection value. In addition, the use of a double coil spring method can enable the pointer to return to its original position accurately and quickly, reducing the problem of the pointer resetting being inflexible due to fatigue of the coil spring. Therefore, according to the above, the problems of unstable transmission of a single set of connecting rods in the existing pressure instrument under high pressure and the inability of the coil spring to accurately return to its original position after a long time are solved. Secondly, the problem of inaccurate value reading caused by wear caused by the connection relationship between the sector gear and the gear alone is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a pressure instrument of the utility model;

[0015] Figure 2 This is a schematic structural diagram of a pressure instrument end connection plate of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of a sector gear of a pressure instrument of the utility model;

[0017] Figure 4 This utility model is a pressure instrument Figure 1 Schematic diagram of the left view structure;

[0018] Figure 5 This utility model is a pressure instrument Figure 3 Schematic diagram of the three-dimensional structure;

[0019] Figure 6 This is a schematic diagram of the main structure of a pressure instrument of the present utility model;

[0020] Figure 7 The figure is a three-dimensional structural diagram of a pressure instrument of the utility model.

[0021] In the figure: 1. watch case; 2. joint; 3. threaded joint; 4. watch frame; 5. bolt; 6. watch plate; 7. pointer; 8. Baden tube; 9. pipe end connector; 10. connecting rod; 11. mounting plate; 12. first connecting column; 13. second connecting column; 14. movable column; 15. gear column; 16. coil spring; 17. sector gear; 18. end connecting plate; 19. small gear; 20. clamping wheel; 21. toothed belt. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example

[0024] See also Figure 1-7 The utility model provides the following technical solutions: a pressure instrument, including a pressure gauge housing structure and a pressure transmission structure, a movement gear structure capable of improving dynamic response, stability and measurement accuracy is installed in the pressure gauge housing structure, the movement gear structure is connected to the pressure transmission structure, the movement gear structure includes a mounting structure, a pressure transmission structure and a rotating structure, the rotating structure is installed on the mounting structure, the pressure transmission structure includes a Baden tube 8, a tube end connector 9 and a connecting rod 10; the arc-shaped end of the Baden tube 8 is provided with two sets of tube end connectors 9, and the tube end connector 9 is movably installed on the side There is a connecting rod 10, and an axis is connected between the lower ends of the two groups of connecting rods 10. The surface of the axis is connected to the rotating structure. A group of movable active columns 14 are installed on the mounting structure, and its rotating structure includes a sector gear 17 and a gear column 15; the gear column 15 passes through the mounting structure, and its movable column 14 passes through the mounting structure, and the ends of the movable column 14 and the gear column 15 are both provided with small gears 19, and a toothed belt 21 is sleeved between the two groups of small gears 19. A sector gear 17 is fixedly installed on the surface of the movable column 14, and the sector gear 17 and the gear column 15 constitute a gear transmission, and two groups of coil springs 16 are provided on the surface of the gear column 15.

[0025] In this embodiment, the specific working principle is as follows: the pressure gauge is connected by a sector gear 17 between the lower ends of the two sets of connecting rods 10, so that the force can be better transmitted from the Baden tube 8 to the sector gear 17, so that the force can be evenly transmitted, and the instability of the transmission force caused by the single set of connecting rods 10 during transmission is prevented, which affects the instability of the precision of the sector gear 17 and the gear column 15 during rotation. Secondly, the sector gear 18 is connected to the movable column 14, so that when the sector gear 17 rotates, it can synchronously drive the movable column 14 to rotate, so that it can be driven by the action of the small gear 19 and the toothed belt 21. The gear column 15 is driven to rotate synchronously, further ensuring the stability of the gear column 15 during rotation, thereby ensuring the accuracy of the pressure value. In order to prevent the coil spring 16 from fatigue after long-term use, the use of a double coil spring 16 can better drive the gear column 15 to achieve reset. Therefore, the above technical solution solves the problem that the existing pressure instrument has a single set of connecting rods that are unstable during transmission under high pressure, and the coil spring cannot accurately return to its original position after a long time. Secondly, the connection relationship between the sector gear and the gear alone causes inaccurate value readings after wear.

[0026] See Figure 1 and Figure 3 It can be seen that the mounting structure includes a mounting plate 11, a first connecting column 12, a second connecting column 13, and a movable column 14; the mounting plate 11 is installed in the pressure gauge housing structure, and the first connecting column 12, the second connecting column 13 and the rotatable movable column 14 are respectively installed on the surface of the mounting plate 11, and an end connecting plate 18 is connected to the end of the first connecting column 12 and the second connecting column 13, and its sector gear 17 is fixedly installed on the surface of the movable column 14.

[0027] According to the above, in order to improve the stability of the sector gear 17 during rotation, please refer to Figure 1 、 Figure 3 、 Figure 5 It can be seen that a fan-shaped opening is provided on the surface of the sector gear 17, which is in contact with the surface of the second connecting column 13. The lower ends of the two sets of connecting rods 10 are connected to the lower end of the sector gear 17 through an axial connection, and the second connecting column 13 passes through the fan-shaped opening. This can provide effective support for the sector gear 17, thereby improving the stability of the sector gear 17 during rotation.

[0028] In order to clamp the toothed belt 21 and effectively realize the rotation of the small gear 20, please refer to Figure 1 It can be seen that a clamping wheel 20 is mounted on the surface of the end connecting plate 18. The clamping wheel 20 is composed of two sets of shafts, and a toothed belt 21 passes between the two sets of shafts.

[0029] How to install the pressure gauge on the pipeline for pressure detection, and how to transmit pressure through the Baden tube 8, please refer to Figure 2 It can be seen that the pressure transmission structure includes a joint 2 and a threaded joint 3; the joint 2 is installed on the pressure gauge housing structure, the threaded joint 3 is installed at the lower end of the joint 2, and the Baden tube 8 is connected to the joint 2 and installed on the pipeline through the threaded joint 3. Since there is a through hole inside the threaded joint 3, the pressure is transmitted to the Baden tube 8 through the through hole. Under the action of pressure, the Baden tube 8 expands due to the pressure, and then drives the sector gear 17 to rotate through the action of the connecting rod 10.

[0030] Based on the above, see Figure 6 and Figure 7 It can be seen that the pressure gauge housing structure includes a case 1, a frame 4, bolts 5, and a dial 6; the frame 4 is installed on the front end face of the case 1 by means of the bolts 5, and a dial 6 is provided inside the case 1, with its joint 2 installed at the lower end of the case 1, and its gear column 15 passes through the dial 6, and a pointer 7 is installed at the front end of the gear column 15. The gear column 15 receives the rotation of the sector gear 17 and then drives the gear column 15 to rotate and then drives the pointer 7 to rotate, and then the value corresponding to the dial 6 pointed by the pointer 7 is displayed, which is convenient for the user to observe.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pressure instrument comprising a pressure gauge housing structure and a pressure transmission structure, characterized in that: A movement gear structure capable of improving dynamic response, stability and measurement accuracy is installed in the pressure gauge housing structure. The movement gear structure is connected to the pressure transmission structure. The movement gear structure comprises a mounting structure, a pressure transmission structure and a rotation structure. The rotation structure is mounted on the mounting structure. The pressure transmission structure comprises a Baden tube (8), a tube end connector (9) and a connecting rod (10). The arc-shaped end of the Baden tube (8) is provided with two groups of tube end connectors (9). The side of the tube end connector (9) is movably provided with a connecting rod (10). A shaft is connected between the lower ends of the two groups of connecting rods (10). The surface of the shaft is in contact with the pressure gauge. The rotating structure is connected, and a group of movable movable columns (14) are installed on the mounting structure. The rotating structure includes a sector gear (17) and a gear column (15); the gear column (15) passes through the mounting structure, and the movable column (14) passes through the mounting structure, and the ends of the movable column (14) and the gear column (15) are both provided with small gears (19), and a toothed belt (21) is sleeved between the two groups of small gears (19). A sector gear (17) is fixedly installed on the surface of the movable column (14), and the sector gear (17) and the gear column (15) form a gear transmission, and two groups of coil springs (16) are provided on the surface of the gear column (15).

2. A pressure instrument according to claim 1, characterized in that: The mounting structure comprises a mounting plate (11), a first connecting column (12), a second connecting column (13), and a movable column (14); the mounting plate (11) is mounted in a pressure gauge housing structure, the first connecting column (12), the second connecting column (13), and the rotatable movable column (14) are respectively mounted on the surface of the mounting plate (11), an end connecting plate (18) is connected to the ends of the first connecting column (12) and the second connecting column (13), and a sector gear (17) is fixedly mounted on the surface of the movable column (14).

3. A pressure instrument according to claim 1, characterized in that: The surface of the sector gear (17) is provided with a sector opening, which contacts the surface of the second connecting column (13), and the lower ends of the two groups of connecting rods (10) are connected to the lower end of the sector gear (17) through shaft connection.

4. A pressure instrument according to claim 2, characterized in that: A clamping wheel (20) is installed on the surface of the end connecting plate (18). The clamping wheel (20) is composed of two groups of shafts, and a toothed belt (21) passes through the two groups of shafts.

5. The pressure instrument according to claim 1, characterized in that: The pressure transmission structure comprises a joint (2) and a threaded joint (3); the joint (2) is mounted on the pressure gauge housing structure, the threaded joint (3) is mounted on the lower end of the joint (2), and the Baden tube (8) is connected to the joint (2).

6. The pressure instrument according to claim 1, characterized in that: The pressure gauge housing structure comprises a gauge case (1), a gauge frame (4), bolts (5), and a gauge plate (6); the gauge frame (4) is mounted on the front end surface of the gauge case (1) via the bolts (5); a gauge plate (6) is provided inside the gauge case (1); a joint (2) is mounted on the lower end of the gauge case (1); a gear column (15) passes through the gauge plate (6); and a pointer (7) is mounted on the front end of the gear column (15).

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