CN213779363U - Pressure gauge - Google Patents

Abstract

A pressure gauge comprises a shell, a dial plate and a pressure detection group, wherein the dial plate and the shell form an accommodating space, the pressure detection group comprises a support, the support is provided with a first rotating shaft, a second rotating shaft, a first baton pipe, a second baton pipe, a first transmission group, a second transmission group and an object entering part, the first baton pipe is in toothed connection with the first rotating shaft through the first transmission group, the second baton pipe is in toothed connection with the second rotating shaft through the second transmission group, the pressure detection group is positioned in the accommodating space, and a first pointer is arranged on the first rotating shaft; the second pointer is arranged on the second rotating shaft, utilizes two types of baton tubes, is matched with the double pointers to present pressure values with different step distances, and has more accurate numerical values compared with the existing pressure gauge.

Description

Pressure gauge

Technical Field

The present invention relates to a pressure gauge for detecting pressure values (e.g., air pressure, oil pressure, water pressure, etc.) of an object under test.

Background

Pressure gauges, which are a common detection gauge at present, are often used in pipelines of various devices (e.g., agricultural machines) to detect air pressure, oil pressure, water pressure, etc. for people to watch, and if the pressure value is too high, the pressure gauge must be adjusted in time to avoid the regret of tube explosion and device damage.

However, as shown in fig. 13, which is the surface of the existing pressure gauge 200, it can be observed that the step distances of the front section numerical values (0 to 5BAR) and the rear section numerical values (5 to 25BAR) are different, because the pressure values required for each degree change are almost the same when the barton tube starts changing the shape, but when the barton tube degree of change starts approaching the limit, the pressure values required for each degree change start rising by multiples, and then the section numerical values are values with larger step distances by using the characteristic, however, the error of each step distance of the rear section numerical values presented by the method can reach a low precision of 20% to 30%, and because the Bardon tube deformation degree is easy to generate irreversible deformation when approaching the limit, the conditions of accuracy reduction, pointer non-zero return and the like are easy to occur, especially when the practical application environment is worse (for example, when the Bardon tube deformation degree is applied to an agricultural machine, the agricultural machine impacts a stone during the running process to generate great instantaneous pulse pressure).

From the above, it can be known that the accuracy of the value detected by the pressure gauge designed by using the bourdon tube is worse as the value approaches the rear section, which is a problem to be solved by each industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the main technical problem lies in, overcomes the above-mentioned defect that prior art exists, and provides a manometer, and it utilizes two kinds of batons to manage, and the two pointers of collocation present the pressure value of different step distances, compares current manometer, and numerical value is more accurate.

The utility model provides a technical scheme that its technical problem adopted is:

a pressure gauge, comprising: a housing; the dial plate is arranged in the shell and is coated with the shell to form an accommodating space; a pressure detecting set having a support, the support having a first rotating shaft, a second rotating shaft, a first baton pipe, a second baton pipe, a first transmission set, a second transmission set, an object entering portion, the first baton pipe engaging the first rotating shaft with the first transmission set, the second baton pipe engaging the second rotating shaft with the second transmission set, the object entering portion communicating with the first baton pipe and the second baton pipe, the pressure detecting set portion located in the containing space, the first rotating shaft and the second rotating shaft penetrating the dial and exposed outside the dial; the first pointer is arranged on the part of the first rotating shaft exposed outside the dial plate; and a second pointer, which is arranged on the part of the second rotating shaft exposed outside the dial plate.

Furthermore, the rack has a first compartment and a second compartment arranged at intervals, the first rotating shaft has a first shaft part and a first gear part connected to each other, the first gear part is located in the first compartment, a through hole penetrating the first shaft part and the first gear part is further provided, the second rotating shaft has a second shaft part and a second gear part connected to each other, the second gear part is located in the second compartment, the second shaft part is arranged through the through hole, the first shaft part and the second shaft part penetrate the dial and are exposed outside the dial, the first transmission set is in gear connection with the first gear part, and the second transmission set is in gear connection with the second gear part.

Further, wherein the support is further provided with a first stop lever and a second stop lever, the first transmission group comprises a first connecting rod and a first umbrella lever which are pivoted with each other, the first umbrella lever is connected with the first rotating shaft through a first umbrella tooth portion, the first connecting rod is connected with the first baton pipe, the second transmission group comprises a second connecting rod and a second umbrella lever which are pivoted with each other, the second umbrella lever is connected with the second rotating shaft through a second umbrella tooth portion, when the first umbrella lever is abutted against the first stop lever, the first umbrella lever cannot continuously drive the first rotating shaft to rotate, and when the second umbrella lever is abutted against the second stop lever, the second umbrella lever cannot continuously drive the second rotating shaft to rotate.

Further, 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, the second stop rod is located in the second compartment, the first transmission group comprises a first connecting rod and a first umbrella rod which are pivoted with each other, the first umbrella rod is connected to the first gear part through a first umbrella tooth part, the first connecting rod is connected to the first baton tube, the second transmission group comprises a second connecting rod and a second umbrella rod which are pivoted with each other, the second umbrella rod is connected to the second gear part through a second umbrella tooth part, when the first umbrella rod abuts against the first stop rod, the first umbrella rod cannot continuously drive the first rotating shaft to rotate, and when the second umbrella rod abuts against the second stop rod, the second umbrella rod cannot continuously drive the second rotating shaft to rotate.

Furthermore, when the first baton tube and the second baton tube are actuated, the swinging directions of the first pointer and the second pointer are opposite.

Further, the first baton tube and the second baton tube are respectively arranged on two opposite sides of the bracket.

Further, any one of the first baton tube and the second baton tube is made of stainless steel.

Further, the wall thickness of the first barton pipe and the second barton pipe is different.

The beneficial effects of the utility model are that, it utilizes two kinds of batons to manage, and the two pointers of collocation present the pressure value of different step distances, compares current pressure gauge, and numerical value is more accurate.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a perspective view of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a schematic cross-sectional view taken along line III-III of fig. 1.

Fig. 4 is a cross-sectional view of the line IV-IV shown in fig. 1.

Fig. 5 is a schematic diagram of the first pointer operation according to the present invention.

Fig. 6 is a schematic diagram of the pointer operation according to the present invention.

Fig. 7 is a schematic view of the first umbrella rod abutting against the stop rod.

Fig. 8 is a perspective view of a second embodiment of the present invention.

Fig. 9 is an exploded view of a second embodiment of the present invention.

Fig. 10 is a schematic cross-sectional view taken along line X-X of fig. 8.

Fig. 11 is a schematic diagram illustrating a pointer operation according to a second embodiment of the present invention.

Fig. 12 is a schematic diagram illustrating the operation of the pointer according to the second embodiment of the present invention.

Fig. 13 is a schematic view of a conventional pressure gauge.

The reference numbers in the figures illustrate:

1 outer cover

2 Dial plate

21 guard zone

3 pressure detecting set

4 support

41 first compartment

42 second compartment

5 first rotating shaft

51 first shaft part

52 first gear part

53 through hole

6 second rotating shaft

61 second shaft part

62 second gear part

7 first bourdon tube

8 second baton tube

9 first transmission group

91 first link

92 first umbrella pole

921 first umbrella tooth part

10 second drive group

101 second connecting rod

102 second umbrella pole

1021 second umbrella tooth part

20 entering part of the object to be measured

30 first stop bar

40 second stop bar

50 first pointer

60 second pointer

70 reset torsion spring

80 joint

100 space for storage

200 pressure gauge

Detailed Description

To understand the embodiments of the present invention in more detail, please look with the attached drawings, as shown in fig. 1 to fig. 6, a pressure gauge is provided, which includes: a housing 1; a dial 2 disposed in the casing 1 and covering the casing 1 to form a receiving space 100; a pressure detecting set 3 having a support 4, the support 4 having a first rotating shaft 5, a second rotating shaft 6, a first badon tube 7, a second badon tube 8, a first transmission set 9, a second transmission set 10, a entering portion 20 for objects to be tested, the first badon tube 7 being toothed by the first transmission set 9 to connect the first rotating shaft 5, the second badon tube 8 being toothed by the second transmission set 10 to connect the second rotating shaft 6, the entering portion 20 for objects to be tested being communicated with the first badon tube 7 and the second badon tube 8, the pressure detecting set 3 being partially located in the containing space 100, the first rotating shaft 5 and the second rotating shaft 6 partially penetrating the dial 2 and being exposed outside the dial 2; a first pointer 50 disposed at a portion of the first rotating shaft 5 exposed outside the dial 2; and a second pointer 60 disposed at a portion of the second shaft 6 exposed outside the dial 2.

In the following, as shown in fig. 1 to 4, in the embodiment, the bracket 4 is assembled to the housing 1 by the object entering portion 20 and the joint 80, and the pressure value detection range of the first baton tube 7 is larger than that of the second baton tube 8, for example, the first rotating shaft 5 controlled by the first baton tube 7 is responsible for driving the first pointer 50 to deflect for indicating the rear segment value (the deflection angle 0-270 degrees corresponds to 5-25 BAR as an example in the embodiment), the second rotating shaft 6 controlled by the second baton tube 8 is responsible for driving the second pointer 60 to indicate the front segment value (the deflection angle 0-270 degrees corresponds to 0-5 BAR as an example in the embodiment), compared with the existing pressure gauge only relying on a single baton tube linkage to indicate the front segment value and the rear segment value, the present invention does not need to use when the change degree of the baton tube begins to approach the limit, the pressure value required for each degree of deformation starts to rise by multiple times, so that the accuracy of numerical value presentation is not questionable, and in the present embodiment, a numerical value presentation manner is shown, as shown in fig. 5, when the object pressure is 3BAR, the second pointer 60 points to 3BAR, and since 3BAR is not enough to generate obvious deformation for the first barton pipe 7, the first pointer 50 does not generate obvious swing, as shown in fig. 6, when the object pressure is 15BAR, the second pointer 60 points to the warning area 21, that is, the pressure value is indicated to be above 5BAR, and the first pointer 50 points to 15 BAR.

In addition, the dual-pointer and dual-Barton tube also have the advantage of more precise value presentation, for example, in this embodiment, the deflection angle of the first pointer is 0-270 degrees to correspond to 5-25 BAR, and the existing pressure gauge 200 shown in FIG. 13 only corresponds to 5-25 BAR with the deflection angle of 90 degrees in total, so that the pressure gauge displaying 0-25 BAR is visible, and the utility model discloses it is more precise and readable obviously to present the value.

As shown in fig. 2 to 4, the rack 4 has a first compartment 41 and a second compartment 42 arranged at intervals, the first rotating shaft 5 has a first shaft 51 and a first gear 52 connected to each other, the first gear 52 is located in the first compartment 41, and further has a through hole 53 passing through the first shaft 51 and the first gear 52, the second rotating shaft 6 has a second shaft 61 and a second gear 62 connected to each other, the second gear 62 is located in the second compartment 42, the second shaft 61 passes through the through hole (and passes through the first shaft 51), the first shaft 51 and the second shaft 61 partially pass through the dial 2 and are exposed outside the dial 2, the first transmission set 9 is geared with the first gear 52, the second transmission set 10 is geared with the second gear 62, such that the first rotating shaft 5 and the second rotating shaft 6 are located on the same straight line, the structure of the support 4 is effectively reduced to reduce the occupied space, and the deflection axes of the first pointer 50 and the second pointer 60 are positioned on the same straight line, so that the occupied area of the dial 2 is minimized.

As shown in fig. 2, 4 and 7, 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 second stop rod 40 is located in the second compartment 42, the first transmission set 9 includes a first link rod 91 and a first umbrella rod 92 which are mutually pivoted, the first umbrella rod 92 is toothed to the first gear portion 52 by a first umbrella tooth portion 921, the first link rod 91 is connected to the first barton pipe 7, the second transmission set 10 includes a second link rod 101 and a second umbrella rod 102 which are mutually pivoted, the second umbrella rod 102 is toothed to the second gear portion 62 by a second umbrella tooth portion 1021, when the first umbrella rod 92 abuts against the first stop rod 30, the first umbrella rod 92 cannot continuously drive the first rotating shaft 5 to rotate, and when the second umbrella rod 102 abuts against the second stop rod 40, the second shaft 102 cannot continue to rotate the second shaft 6, and the first and second stop rods 30 and 40 are advantageous in preventing the first and second shafts 5 and 6 from rotating excessively to damage the return torsion spring 70 (the first and second shafts 5 and 6 each have a corresponding return torsion spring 70), and preventing the first and second baaden tubes 7 and 8 from deforming excessively without irreversible deformation.

The present invention further provides another embodiment, as shown in fig. 8 to 12, wherein when the first and second barton tubes 7 and 8 are actuated, the first and second pointers 50 and 60 swing in opposite directions, which is advantageous over the previous embodiment in that the front section value and the rear section value can be respectively arranged in clockwise and counterclockwise increments in the left-to-right direction in the drawing, so that the displayed values can be more easily viewed.

As shown in fig. 9 and 10, the first barton tube 7 and the second barton tube 8 are respectively disposed on opposite sides of the bracket 4, so that the first barton tube 7 and the second barton tube 8 change in opposite directions, thereby realizing opposite swinging directions of the first pointer 50 and the second pointer 60.

The material of any one of the first and second barton tubes 7 and 8 is stainless steel, which is a material with excellent toughness to improve the resilience of the barton tube after deformation and further improve the product life, taking this embodiment as an example, the pressure value detection range of the first barton tube 7 in this embodiment is larger than that of the second barton tube 8, so the material of the second barton tube 8 is preferably stainless steel, because the detection range of the second barton tube 8 is 0 to 5BAR, and if the pressure gauge is applied to an environment with a normal pressure above 5BAR, the second barton tube 8 must be in an overpressure state at all times, so the stainless steel is selected as the material to effectively avoid the occurrence of irreversible deformation, and it can be known that the material of the second barton tube 8 is preferably stainless steel if the pressure value detection range of the first barton tube 7 is larger than that of the second barton tube 8, if the pressure value detection range of the first bourdon tube 7 is smaller than that of the second bourdon tube 8, the first bourdon tube 7 is preferably made of stainless steel.

The wall thicknesses of the first and second barton tubes 7 and 8 are different, if the pressure value detection range of the first barton tube 7 is greater than that of the second barton tube 8, the wall thickness of the first barton tube 7 is greater than that of the second barton tube 8, and if the pressure value detection range of the first barton tube 7 is less than that of the second barton tube 8, the wall thickness of the first barton tube 7 is less than that of the second barton tube 8, so that generally, in order to achieve the purpose of different pressure value detection ranges, the first and second barton tubes 7 and 8 with different sizes are used, and the effect of different pressure value detection ranges can be achieved by using the difference of the wall thicknesses.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (8)

1. A pressure gauge, comprising:

a housing;

the dial plate is arranged in the shell and is coated with the shell to form an accommodating space;

a pressure detecting set having a support, the support having a first rotating shaft, a second rotating shaft, a first baton pipe, a second baton pipe, a first transmission set, a second transmission set, an object entering portion, the first baton pipe engaging the first rotating shaft with the first transmission set, the second baton pipe engaging the second rotating shaft with the second transmission set, the object entering portion communicating with the first baton pipe and the second baton pipe, the pressure detecting set portion located in the containing space, the first rotating shaft and the second rotating shaft penetrating the dial and exposed outside the dial;

the first pointer is arranged on the part of the first rotating shaft exposed outside the dial plate;

and a second pointer, which is arranged on the part of the second rotating shaft exposed outside the dial plate.

2. The pressure gauge of claim 1, wherein the holder has a first compartment and a second compartment spaced apart from each other, the first shaft has a first shaft portion and a first gear portion connected to each other, the first gear portion is disposed in the first compartment, and a through hole is formed through the first shaft portion and the first gear portion, the second shaft has a second shaft portion and a second gear portion connected to each other, the second gear portion is disposed in the second compartment, the second shaft portion is disposed through the through hole, the first shaft portion and the second shaft portion penetrate the dial and are exposed outside the dial, the first transmission gear is engaged with the first gear portion, and the second transmission gear is engaged with the second gear portion.

3. The pressure gauge according to claim 1, wherein the bracket further comprises a first stop rod and a second stop rod, the first transmission set comprises a first connecting rod and a first umbrella rod which are pivoted to each other, the first umbrella rod is connected to the first rotating shaft through a first umbrella tooth portion, the first connecting rod is connected to the first bourdon tube, the second transmission set comprises a second connecting rod and a second umbrella rod which are pivoted to each other, the second umbrella rod is connected to the second rotating shaft through a second umbrella tooth portion, when the first umbrella rod abuts against the first stop rod, the first umbrella rod cannot continuously drive the first rotating shaft to rotate, and when the second umbrella rod abuts against the second stop rod, the second umbrella rod cannot continuously drive the second rotating shaft to rotate.

4. A pressure gauge according to claim 2, wherein the holder is further provided with a first stop rod, a second stop rod, the first stop rod is positioned in the first compartment, the second stop rod is positioned in the second compartment, the first transmission set comprises a first connecting rod and a first umbrella rod which are pivoted with each other, the first umbrella rod is in gear connection with the first gear part through a first umbrella tooth part, the first connecting rod is connected with the first climbing pipe, the second transmission group comprises a second connecting rod and a second umbrella rod which are pivoted with each other, the second umbrella rod is connected with the second gear part by a second umbrella gear part, wherein when the first umbrella pole is abutted against the first stop pole, the first umbrella pole can not drive the first rotating shaft to rotate continuously, when the second umbrella rod is abutted against the second stop rod, the second umbrella rod cannot continuously drive the second rotating shaft to rotate.

5. The pressure gauge according to claim 1, wherein the first and second pointers swing in opposite directions when the first and second bourdon tubes are actuated.

6. The pressure gauge of claim 1, wherein the first and second bourdon tubes are disposed on opposite sides of the bracket.

7. The pressure gauge according to claim 1, wherein any one of the first bourdon tube and the second bourdon tube is made of stainless steel.

8. The pressure gauge according to claim 1, wherein the first and second bourdon tubes have different wall thicknesses.

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