TWM608208U - Pressure gauge - Google Patents

Abstract

A pressure gauge has a housing, a dial, and a pressure detection group. The dial and the housing form an accommodating space. The pressure detection group has a bracket. The bracket is provided with a first rotating shaft, a second rotating shaft, a first Baden tube, and a second Baden Tube, the first transmission group, the second transmission group, the entry part of the object to be measured, the first Baden tube is connected to the first rotating shaft by the first transmission group, and the second Baden tube is connected to the second rotation shaft by the second transmission group. The pressure detection group is located in the accommodating space, the first pointer is set on the first shaft; the second pointer, which is set on the second shaft, uses two types of Baden tubes and is paired with dual pointers to present pressure values of different steps. Compared with the conventional pressure gauge, the value is more accurate.

Description

Pressure gauge

This creation is about a kind of pressure gauge, which is used to detect the pressure value of the object to be measured (for example: air pressure, oil pressure, water pressure, etc.).

The pressure gauge is a very common detection gauge nowadays. It is often used in the pipelines of various equipment (such as agricultural machinery) to detect air pressure, oil pressure, water pressure, etc., so that people can watch it easily. If the value is too high, the relevant equipment must be adjusted in time to avoid the occurrence of regrets such as pipe bursts and equipment damage.

There are many types of pressure detection mechanisms for pressure gauges on the market. One of the more common ones is to use a Baden tube, which is filled with the object to be tested and the deformation produced by the Baden tube is used to drive the pointer to swing. The pressure gauge designed by the assembling tube has a defect. First of all, as shown in Figure 13, this is the surface of the conventional pressure gauge 200. The level of the front-end value (0~5BAR) and the back-end value (5~25BAR) can be observed. The distance is different. This is because when the Baden tube is first deformed, the pressure required for each degree of deformation is almost the same, but when the degree of deformation of the Baden tube begins to approach the limit, each degree of deformation The required pressure value starts to increase by multiples, and the latter value uses this feature to obtain a larger value of the step distance. However, the error of each step distance of the latter value presented by this method will reach 20%~30% The accuracy is quite low, and because the Baden tube deformation degree starts to approach the limit, it is easy to produce irreversible deformation, so that the accuracy drops and the pointer cannot be returned to zero are easy to occur, especially when the actual application environment is relatively harsh ( For example, when applied to an agricultural machine, when the agricultural machine hits a stone during driving, a great instantaneous pulse pressure is generated).

Based on the above content, it can be seen that the value detected by the conventional pressure gauge designed with the Baden tube has a problem that the closer the value is to the latter, the worse the accuracy. It can be said that the major industry is eager to solve the problem.

This creation uses two kinds of Baden tubes with dual pointers to show the pressure values of different steps. Compared with the conventional pressure gauges, the values are more accurate.

In order to achieve the above-mentioned purpose and effect, the present invention provides a pressure gauge, which includes: a housing; a dial, which is arranged in the housing and covers the housing to form an accommodating space; and a pressure detection group, which has an accommodating space A support, the support is provided with a first rotating shaft, a second rotating shaft, a first Baden tube, a second Baden tube, a first transmission group, a second transmission group, a test object entry part, the first A Baden tube is toothed with the first rotating shaft by the first transmission group, the second Baden tube is toothed with the second rotating shaft by the second transmission group, the entry part of the object to be measured and the first Baden tube, The second Baden tube is connected, the pressure detection group part is located in the accommodating space, the first shaft and the second shaft part penetrate the dial and are exposed on the outside of the dial; a first pointer is arranged on the The first rotating shaft is exposed on the outer part of the dial; and a second pointer is arranged on the second rotating shaft is exposed on the outer part of the dial.

In order to understand the implementation of this creation in more detail, please see the accompanying pictures. As shown in the first to sixth pictures, it is a pressure gauge, which includes: a housing 1; a dial 2, which is arranged on the housing 1. Inside and enveloping the housing 1 to form an accommodating space 100; a pressure detecting group 3, which has a bracket 4, the bracket 4 is provided with a first rotating shaft 5, a second rotating shaft 6, a first Baden tube 7. A second Baden tube 8, a first transmission group 9, a second transmission group 10, a DUT entry part 20, the first Baden tube 7 is toothed with the first transmission group 9 A rotating shaft 5, the second Baden tube 8 is toothed to the second rotating shaft 6 through the second transmission assembly 10, and the DUT entry part 20 is in communication with the first Baden tube 7 and the second Baden tube 8 , The pressure detection group 3 is partially located in the accommodating space 100, the first rotating shaft 5 and the second rotating shaft 6 partially penetrate the dial 2 and are exposed on the outside of the dial 2; a first pointer 50 is disposed on the The first rotating shaft 5 is exposed on the outer part of the dial 2; and a second pointer 60 is arranged on the second rotating shaft 6 exposed on the outer part of the dial 2.

Continuing the above content to further detail the implementation of this creation, first, as shown in Figures 1 to 4, in this embodiment, the holder 4 is combined with the housing 1 with the object entry portion 20 to be tested and a joint 80, and the first For example, the pressure value detection range of a Baden tube 7 is greater than that of the second Baden tube 8. For example, the first rotating shaft 5 controlled by the first Baden tube 7 is responsible for driving the first pointer 50 to deflect for indicating the subsequent value (this The embodiment takes the deflection angle of 0 to 270 degrees corresponding to 5 to 25 BAR as an example), the second rotating shaft 6 controlled by the second Baden tube 8 is responsible for driving the second pointer 60 to indicate the previous value (this embodiment uses the deflection angle of 0 to 270 degrees Corresponding to 0~5BAR as an example), compared to the conventional pressure gauge that only relies on a single Baden tube to link the pointer to indicate the front and back values, this creation does not need to use when the Baden tube deformation begins to approach the limit. The pressure value required for a degree of change begins to increase in multiples. Therefore, it is no doubt that the precision of the numerical value presentation is more accurate. In this embodiment, a numerical value presentation method is shown, as shown in the fifth figure. When the pressure of the object under test is 3BAR, the second pointer 60 will point to 3BAR, and since 3BAR is not enough to cause significant deformation of the first Baden tube 7, the first pointer 50 does not produce significant swings. As shown in Figure 6, when the pressure of the test object is 15BAR, the second pointer 60 will point to the warning zone 21, which means that the pressure value is above 5BAR, and the first pointer 50 will point to 15BAR.

In addition, the use of dual pointers and double Baden tubes also has the advantage of more precise numerical presentation. For example, in this embodiment, the deflection angle of the first pointer is 0~270 degrees corresponding to 5~25 BAR, and the conventional art shown in Figure 13 The pressure gauge 200 only corresponds to 5~25BAR with a total deflection angle of 90 degrees. It can be seen that the pressure gauge is also a pressure gauge that displays 0~25BAR. This creation obviously lies in the presentation of the numerical value more detailed and easy to read.

As shown in the second to fourth figures, the bracket 4 has a first compartment 41 and a second compartment 42 spaced apart, and the first shaft 5 has a first shaft portion 51 and a A gear portion 52, the first gear portion 52 is located in the first compartment 41, and a through hole 53 penetrates the first shaft portion 51 and the first gear portion 52, and the second rotating shaft 6 has a connected first Two shaft portions 61, a second gear portion 62, the second gear portion 62 is located in the second compartment 42, the second shaft portion 61 passes through the through hole (and passes through the first shaft portion 51), The first shaft portion 51 and the second shaft portion 61 partially penetrate the dial 2 and are exposed outside the dial 2, the first transmission group 9 is toothed to the first gear part 52, and the second transmission group 10 is toothed to the The second gear portion 62. This structure enables the first shaft 5 and the second shaft 6 to be on the same straight line, effectively reduces the structure of the bracket 4 to reduce space occupation, and makes the first pointer 50 and the second pointer 60 deflection The axis positions are located on the same straight line to minimize the area occupied by the dial 2.

As shown in the second, fourth, and seventh figures, the bracket 4 is further provided with a first stop rod 30 and a second stop rod 40, the first stop rod 30 is located in the first compartment 41, the The second stop rod 40 is located in the second compartment 42, and the first transmission set 9 includes a first connecting rod 91 and a first umbrella rod 92 pivoted to each other. The bevel gear part 921 is toothed to the first gear part 52, the first connecting rod 91 is connected to the first Baden tube 7, and the second transmission assembly 10 includes a second connecting rod 101, a second connecting rod 101 and a second connecting rod 101 pivoted to each other. The second umbrella pole 102 is toothed to the second gear portion 62 with a second umbrella tooth portion 1021, wherein when the first umbrella pole 92 abuts against the first stop rod 30, the The first umbrella rod 92 cannot continue to drive the first shaft 5 to rotate. When the second umbrella rod 102 abuts against the second stop rod 40, the second umbrella rod 102 cannot continue to drive the second shaft 6 to rotate. The advantage of the first stop lever 30 and the second stop lever 40 is to avoid excessive rotation of the first rotating shaft 5 and the second rotating shaft 6 causing the reset torsion spring 70 (the first rotating shaft 5 and the second rotating shaft 6 each have a corresponding reset torsion spring 70), the first Baden tube 7 and the second Baden tube 8 are excessively deformed without irreversible deformation.

This creation also provides another embodiment, as shown in Figures 8 to 12, in which when the first Baden tube 7 and the second Baden tube 8 are actuated, the first pointer 50 and the second The pointer 60 swings in the opposite direction. The advantage compared to the previous embodiment is that the front value and the back value can be arranged in increasing clockwise and counterclockwise directions from left to right in the drawing, so as to make the displayed value easier to see.

As shown in the ninth and tenth figures, the first Baden tube 7 and the second Baden tube 8 are respectively arranged on opposite sides of the bracket 4, so that the first Baden tube 7 and the second Baden tube The direction of the 8-type change is opposite, so that the swing directions of the first pointer 50 and the second pointer 60 are opposite.

The material of any one of the first Baden tube 7 and the second Baden tube 8 is stainless steel. Stainless steel is a material with excellent toughness to improve the recovery ability of the Baden tube after deformation, thereby increasing the life of the product. Taking this embodiment as an example, the detection range of the pressure value of the first Baden tube 7 in this embodiment is larger than that of the second Baden tube 8. Therefore, the material of the second Baden tube 8 is more suitable for stainless steel. The reason is that The detection range of the second Baden tube 8 is 0~5BAR, and if the pressure gauge is used in an environment with a normal pressure above 5BAR, the second Baden tube 8 must always be in a state of overpressure, so stainless steel is used as the material It can effectively avoid irreversible deformation. In summary, it can be seen that if the pressure detection range of the first Baden tube 7 is greater than that of the second Baden tube 8, the material of the second Baden tube 8 is more suitable for stainless steel. If the detection range of the pressure value of the first Baden tube 7 is smaller than that of the second Baden tube 8, the material of the first Baden tube 7 is preferably stainless steel.

The first Baden tube 7 and the second Baden tube 8 have different tube wall thicknesses. If the pressure detection range of the first Baden tube 7 is greater than that of the second Baden tube 8, the first Baden tube 8 The wall thickness of the tube 7 is greater than that of the second Baden tube 8. If the detection range of the pressure value of the first Baden tube 7 is smaller than that of the second Baden tube 8, the thickness of the first Baden tube 7 The thickness of the tube wall is smaller than that of the second Baden tube 8. Generally, to achieve the purpose of different pressure value detection ranges, the first Baden tube 7 and the second Baden tube 8 of different sizes are used, and the tube The difference in wall thickness can also achieve the effect of different pressure detection ranges.

＜This creation＞ 1: shell 2: dial 21: Warning zone 3: Pressure detection group 4: Bracket 41: first compartment 42: second compartment 5: The first shaft 51: The first shaft 52: The first gear part 53: Through hole 6: The second shaft 61: second shaft 62: The second gear part 7: The first Baden tube 8: The second Baden tube 9: The first transmission group 91: first link 92: The first umbrella pole 921: first umbrella tooth 10: The second transmission group 101: second link 102: second umbrella pole 1021: Second umbrella tooth 20: Enter the part of the object to be tested 30: The first stop lever 40: second stop lever 50: first pointer 60: second pointer 70: Reset torsion spring 80: Connector 100: accommodating space ＜Acquaintances＞ 200: pressure gauge

The first picture is a three-dimensional diagram of the creation. The second picture is a schematic diagram of the decomposition of the creation. The third figure is a schematic cross-sectional view of the line segment III-III in the first figure. The fourth figure is a schematic diagram of the section IV-IV of the first figure. The fifth figure is a schematic diagram of the creative pointer movement. The sixth figure is the second schematic diagram of the creative pointer action. The seventh figure is a schematic diagram of the first umbrella rod abutting against the stop rod. The eighth figure is a three-dimensional schematic diagram of the second embodiment of the creation. The ninth figure is an exploded schematic diagram of the second embodiment of the creation. The tenth figure is a schematic diagram of the X-X section of the eighth figure. The eleventh figure is the first schematic diagram of the pointer action in the second embodiment of this creation. The twelfth figure is the second schematic diagram of the pointer action in the second embodiment of this creation. Figure 13 is a schematic diagram of a conventional pressure gauge.

1: shell

2: dial

50: first pointer

60: second pointer

80: Connector

Claims (8)

A pressure gauge, which includes: A shell A dial, which is arranged in the casing and covers the casing to form an accommodating space; A pressure detection group, which has a bracket, the bracket is provided with a first shaft, a second shaft, a first Baden tube, a second Baden tube, a first transmission group, a second transmission group, An entry part for the object to be measured, the first Baden tube is toothed to the first shaft by the first transmission group, the second Baden tube is toothed to the second shaft by the second transmission group, and the object to be measured enters The part is communicated with the first Baden tube and the second Baden tube, the pressure detection group part is located in the accommodating space, and the first shaft and the second shaft part penetrate the dial and are exposed on the outside of the dial; A first pointer, which is arranged on the part of the first rotating shaft that is exposed on the outside of the dial; And a second pointer, which is arranged on the part of the second rotating shaft exposed to the outside of the dial. The pressure gauge according to claim 1, wherein the bracket has a first compartment and a second compartment spaced apart, the first rotating shaft has a first shaft portion and a first gear portion connected to each other, and the second A gear part is located in the first compartment, and there is a through hole penetrating the first shaft part and the first gear part. The second shaft has a second shaft part and a second gear part connected to each other. The gear portion is located in the second compartment, the second shaft portion penetrates the through hole, the first shaft portion and the second shaft portion penetrate the dial and are exposed outside the dial, and the first transmission group is toothed The first gear part and the second transmission set are toothed to the second gear part. The pressure gauge according to claim 1, wherein the bracket is further provided with a first stop rod and a second stop rod, and the first transmission group includes a first connecting rod and a first umbrella pivoted to each other Rod, the first umbrella rod is toothed to the first rotating shaft with a first umbrella tooth portion, the first connecting rod is connected to the first Baden tube, and the second transmission set includes a second pivotal Connecting rod, a second umbrella rod, the second umbrella rod is toothed to the second rotating shaft with a second umbrella tooth part, wherein when the first umbrella rod abuts against the first stop rod, the first umbrella rod The rod cannot continue to drive the first shaft to rotate, and when the second umbrella rod abuts against the second stop rod, the second umbrella rod cannot continue to drive the second shaft to rotate. The pressure gauge according to claim 2, wherein the bracket is further provided with a first stop rod and a second stop rod, the first stop rod is located in the first compartment, and the second stop rod is located in the In the second compartment, the first transmission group includes a first connecting rod and a first umbrella rod pivoted to each other, and the first umbrella rod is toothed to the first gear part by a first bevel tooth part, the The first connecting rod is connected to the first Baden tube, the second transmission group includes a second connecting rod and a second umbrella rod pivoted to each other, and the second umbrella rod is toothed with a second umbrella tooth In the second gear part, when the first umbrella rod abuts against the first stop rod, the first umbrella rod cannot continue to drive the first shaft to rotate, and the second umbrella rod abuts against the second stop rod. When the lever is blocked, the second umbrella lever cannot continue to drive the second shaft to rotate. The pressure gauge according to claim 1, wherein when the first Baden tube and the second Baden tube are actuated, the first pointer and the second pointer swing in opposite directions. The pressure gauge according to claim 1, wherein the first Baden tube and the second Baden tube are respectively arranged on opposite sides of the bracket. As for the pressure gauge according to claim 1, the material of any one of the first Baden tube and the second Baden tube is stainless steel. The pressure gauge according to claim 1, wherein the tube wall thickness of the first Baden tube and the second Baden tube are different.

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