JPS6216669Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a composite pressure gauge that measures the high primary pressure and the low secondary pressure of gas cylinders filled with various gases using a single pressure gauge.

In general, gas cylinders filled with various gases at high pressure, such as oxygen gas cylinders, acetylene gas cylinders, carbon dioxide gas cylinders, and hydrogen gas cylinders, have a high-pressure primary pressure gauge and pressure regulator that measure the internal pressure of the cylinder to display the remaining amount of gas, etc. A low-pressure secondary pressure gauge is used to measure the gas pressure outside the cylinder. Therefore, since two pressure gauges are used, the cost of the gauges increases, there is a risk of misreading the scales of the high and low pressure gauges, and there are further disadvantages such as the need to provide protection for the gauges at two locations.

The present invention is a composite pressure gauge that is capable of simultaneously measuring both primary and secondary pressures with one pressure gauge, taking the above points into consideration.

The proposed composite pressure gauge shown in the drawing is omitted from the outer frame, but when used generally, it can be housed within the desired outer frame.
It goes without saying that it must be protected from damage from external pressure and impact.

The composite pressure gauge has two Bourdon tubes 2 for high pressure and 4 Bourdon tubes 3 for low pressure arranged on a base 1 at a required distance between the outside and the inside.

The base 1 further has a back plate 4 attached to the Bourdon tube 2,
A pointer device is provided on the back plate 4 to indicate the deformation of the Bourdon tube in response to the pressure applied to the two Bourdon tubes 2 and 3 with a pointer. The pointer device includes a fixed base 5 fixed to the back plate 4, a pointer frame 6 provided on the fixed base 5, and double inner and outer pipe type pointer shafts 7, 8 provided on the pointer frame 6 so as to be freely rotatable. It is formed by a rotation mechanism such as a pinion and a fan-shaped gear that rotates the pointer shafts 7 and 8.

The pointer frame 6 is formed by fixing between two or three frame plates 6a, 6a with one or more supports 6b planted on the fixed base 5, and fixed between the opposing frame plates 6a, 6a. A shaft 9 is provided, and two fan-shaped gears 10 and 11, one between each frame plate, are pivotally connected to the fixed shaft 9 so as to rotate individually. The sector gears 10 and 11 may have the same shape, but may have different shapes as shown in the drawings, with teeth 10 at one end of each.
A is carved, and link pivot parts 10a and 11b are integrally formed at the other end or the center thereof, and pinions 12 and 13 are meshed with the teeth 10a and 11a of the fan-shaped gear. The pinions 12 and 13 are provided on the above-mentioned pointer shafts 7 and 8, and the pinion 12 is fixed to a part of the outer pointer shaft 7, and the pinion 13 is fixed to the inner pointer shaft 8, respectively. The diameter and number of teeth of the pinions 12 and 13 are determined by the scale indicating the primary pressure and secondary pressure of the composite pressure gauge and the swing range of the pointer.

Furthermore, the fan-shaped gear link pivot portions 10b, 10b
The tips of the links 14 and 15 are pivotally connected to the tips of the Bourdon tubes 2 and 3 via pins P ₁ and P ₂ , and the links 14 and 1 are connected to the Bourdon tubes 2 and 3 via pins P 1 and P 2 .
5 to the sector gear 10 or 11 so that the deformation of the Bourdon tube due to the applied pressure causes the sector gear to swing (rotate) through each link, and the pinion 12 or 13 meshed with each sector gear. The pointer shaft 7 or 8 is rotated through it. At this time, the two pointer shafts 7 and 8 each have a mainspring spring.
When S ₁ and S ₂ are provided and the pressure applied to Bourdon tubes 2 and 3 is released, each pointer automatically returns to its original state.
Allow it to return to its position. The tip of one pointer shaft 8 passes through the center of the pointer frame 6 protruding from the back plate 4 and the scale plate 17 provided on the base 1, etc., and protrudes from the surface of the scale plate. The tip of the other pointer shaft 7 is made to face the back side of the scale plate so as not to penetrate through the scale plate.

A pointer 1 for low pressure display is attached to the tip of the pointer shaft 8.
8, and a disc-shaped pointer 19 for high voltage indication is fixed to the tip of the pointer shaft 7, respectively.

The disc-shaped pointer is rotatable along the back side of the scale plate, and the pointer 19 is provided with an arc-shaped 19a, indicating 1.
9a is made to face an arc-shaped window 17a formed in the scale plate 17, and a scale A for high pressure is provided through the window 17.
The scale A indicated by the tip edge of the display 19 seen through the window 19a by rotating the disc-shaped pointer by deforming the Bourdon tube 2
It is read to detect the current high pressure side pressure, and the low pressure side pressure is measured by the low pressure scale B attached to the scale plate.
It is to be read using the guidelines that point to.

Although omitted in the above explanation and drawings, the base 1 on which the two Bourdon tubes 2 and 3 are fixed has a structure that is connected to the inside of each Bourdon tube so as to apply pressure on the primary and secondary sides to the inside of each Bourdon tube. It is.

As described above, the composite pressure gauge can display both high pressure and low pressure sides at the same time with a single pressure gauge, and moreover, it is possible to display both high pressure and low pressure sides at the same time using a single pressure gauge.Moreover, the high pressure disk-shaped pointer can be used through the window hole drilled at the bottom of the scale plate. In addition, for low pressure, the normal pointer is rotated on the scale plate and displayed in different ways, so there is no misreading of the pointer scale, and the number of parts and installation are easier than using two pressure gauges as in the past. It requires less labor and can be provided at low cost, and can be easily and firmly protected, resulting in excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a front view, FIG. 2 is a back view, FIG. 3 is a side view, and FIG. 4 is an exploded perspective view. 1... Base, 2, 3... Bourdon tube, 4... Back plate, 5... Fixed base, 6... Pointer frame, 7, 8... Pointer shaft, 9... Fixed shaft, 10, 11... ...Sector gear,
12, 13... Pinion, 4, 15... Link,
16... Pillar, 17... Dial plate, 18, 19...
Pointer, A...High pressure side scale, B...Low pressure side scale,
_S1 , _S2 ...Spring spring, _P1 , _P2 ...Pin.

Claims (1)

[Scope of utility model claims] The two Bourdon tubes on the high pressure side and the Bourdon tube on the low pressure side, which are connected to the respective pressure sources of high pressure and low pressure, are made into an inner and outer double type and protrude from the base, and the deformation of each Bourdon tube is changed to an inner and outer double pipe type. A transmission mechanism consisting of links and fan-shaped gear pinions is provided from the tip of the Bourdon tube to transmit information individually to the high-pressure side and low-pressure side pointer shafts arranged on the same axis, and the tip of the low-pressure side pointer shaft is usually The pointer on the high pressure side is provided so as to rotate on the scale plate, and the high pressure side pointer is in the shape of a disk.This disk shaped pointer is fixed to the tip of the high pressure side pointer shaft on the back side of the scale plate, A compound pressure gauge consisting of a single scale plate with a disc-shaped pointer peeking out through a perforated window hole and displaying both high and low pressure at the same time and in different shapes.