CN217276592U

CN217276592U - Fork spring type pressure gauge

Info

Publication number: CN217276592U
Application number: CN202220781726.3U
Authority: CN
Inventors: 周永华
Original assignee: Zhejiang Pusaixun Instrument Co ltd
Current assignee: Zhejiang Pusaixun Instrument Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-08-23
Anticipated expiration: 2032-04-07

Abstract

The utility model discloses a novel manometer of fork spring formula, including watchcase (6), indicating mechanism, pressure gauge head (13), watchcase (6) on be equipped with watchcase joint (7), install fork spring component (8) of being connected with indicating mechanism on watchcase joint (7), be equipped with interior step (17) and last interface (16) on the pressure channel of pressure gauge head (13), install diaphragm (11) on interior step (17) in proper order, the base of diaphragm (10) and fork spring component (8) to compress tightly fixedly with last interface (16) cooperation through watchcase joint (7), be equipped with ejector pin (9) between fork spring component (8) and diaphragm (11), the one end top of ejector pin (9) is on fork spring component (8), the other end passes the centre bore top of diaphragm (10) on diaphragm (11). After adopting this structure, have that structural design is reasonable, receive working medium and ambient temperature influence little, measurement accuracy is high, superpressure and alternation performance are good, shock resistance advantage such as strong.

Description

Fork spring type pressure gauge

Technical Field

The utility model relates to a pressure measurement technical field, especially a can be used for complicated medium environment, receive ambient temperature to influence little, shock resistance and the novel manometer of fork spring formula that overpressure capacity is good.

Background

The pressure gauge is an instrument for measuring and indicating the pressure higher than the environmental pressure, and is widely applied to the fields of heating power pipe networks, water and gas supply systems, oil and gas transmission, petroleum refining, pharmaceutical and chemical engineering and the like, particularly in the industrial process control and technical measurement process. The spring tube type pressure gauge is widely applied due to mature production process and low price. The spring tube type pressure gauge mainly comprises a joint, a meter shell, a meter cover, a spring tube, a movement, a pointer and other parts, wherein when the spring tube type pressure gauge works, an external liquid medium enters the inside of the spring tube through the joint, and under the action of pressure, the spring tube deforms to drive the pointer on the movement to rotate so as to indicate external pressure.

However, the spring tube type pressure gauge has the following disadvantages due to the structural limitation: firstly because measured medium need get into in the spring pipe just can realize pressure measurement, consequently it is higher to the medium cleanliness requirement, then can't use or need install isolating device additional in addition and just can normal use to thick, granular medium environment. And secondly, the liquid expansion coefficient is high and is easily influenced by environmental conditions such as temperature, so that the liquid medium entering the spring tube is obviously influenced by the temperature, and the problems that the pointer of the instrument floats and the instrument cannot return to zero after high-temperature expansion exist. Thirdly, the durability of the spring tube is high, and the spring tube is slightly deformed when being used for a long time, so that the measurement precision is reduced. Fourthly, the overpressure performance is poor, the requirement of the spring tube type pressure gauge on overpressure generally does not exceed 125% of the measuring range of the gauge at most, the overpressure performance is not enough to meet the requirement of a client on a severe environment, and the spring tube type pressure gauge is easy to damage and poor in shock resistance when being subjected to pressure impact. Fifthly, the alternating performance is poor, the service life is short due to the limitation of the mechanical performance of the spring tube, and the alternating pressure regulation of the national standard to the spring tube pressure gauge is 20000 times. Therefore, many scientific research institutions and manufacturers develop and develop the products, but no ideal products are available.

Disclosure of Invention

For overcoming the above-mentioned defect that prior art exists, the utility model aims at providing a structural design is reasonable, receive by the side medium and ambient temperature influence little, measurement accuracy is high, superpressure and the novel manometer of forked spring formula that the alternation performance is good, shock resistance is strong.

The utility model provides a technical scheme that above-mentioned technical problem adopted, it includes watchcase, indicating mechanism, pressure meter connector, the watchcase on be equipped with the watchcase and connect, the watchcase connects and installs the forked spring component of being connected with indicating mechanism, pressure meter connector's pressure channel is equipped with interior step and last interface, install the base of diaphragm, diaphragm and forked spring component on the interior step in proper order to it compresses tightly fixedly to connect the cooperation of last interface through the watchcase, be equipped with the ejector pin between forked spring component and diaphragm, the one end top of ejector pin is on the fork mouth of forked spring component, the other end passes the centre bore top of diaphragm on the diaphragm.

The utility model discloses a further scheme, be equipped with seal ring between the plane of interior step and the diaphragm.

The utility model discloses a further scheme, the watchcase connect and be equipped with positioning channel section, be equipped with on the fork spring component with positioning channel section tight fit prevent pivoted location portion.

The utility model discloses a further scheme, the manometer connect for the hexagonal connects, its lower part is equipped with the external screw thread that is used for the installation.

After the structure is adopted, compared with the prior art, the utility model has the following advantages:

firstly, the pressure of working medium is transmitted to a top pressure fork spring element through a diaphragm and a top rod during working, the fork spring element is expanded and drives a movement assembly, the movement assembly drives a pointer to display the pressure, and the working medium is isolated by the diaphragm and does not enter a pressure gauge, so the pressure gauge is not influenced by measuring medium, and the pressure gauge can be applied to any environment, particularly viscous and complex medium environments, and has more obvious advantages;

secondly, because the fork spring element is made of metal materials, does not contact with a measuring medium, and has small expansion coefficient influenced by temperature, the working temperature range can reach-50 ℃ to +150 ℃, while the working temperature of the spring tube type pressure gauge can only be used at-40 ℃ to +70 ℃, and a heat dissipation device is required to be additionally arranged when the spring tube type pressure gauge is used at a high temperature, so that the cost is increased and the structure is overstaffed; the spring tube type pressure gauge is influenced by temperature and is calculated according to a temperature influence formula given by national standards, the error of the spring tube type pressure gauge does not exceed the regulation, the utility model has no error, and inaccurate indication value caused by temperature influence is not required to be calculated completely;

thirdly, in the overpressure performance, the pressure gauge of the utility model can easily overpressure 150%, can cope with higher pressure extreme value, and simultaneously in the allowable overpressure range, the impact resistance of the gauge is also different, the spring tube type pressure gauge can cause irreversible damage or change of microscopic performance to the spring tube in the instant high-pressure impact, while the cross spring type pressure gauge can be more suitable for the pressure impact, under the high-pressure impact, the performance of the elastic element can not be reduced, and the shock resistance is strong;

fourthly, the alternation performance is also an important parameter related to the service life of the pressure gauge, the pressure gauge of the utility model can be used for 5 to 10 ten thousand times, and the spring tube type pressure gauge can only be used for 20000 times generally, so the durability of the pressure gauge is far higher than that of the spring tube type pressure gauge;

fifthly, the fork spring type pressure gauge has the advantages that the elastic element is a fork spring element, the performance is better than that of a spring tube, and the service life is 3-5 times that of the spring tube.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic view of the exploded structure of the present invention.

Fig. 3 is a schematic view of the section a-a of fig. 1 according to the present invention.

The meter comprises a meter cover 1, a meter glass 2, a pointer 3, a dial 4, a movement assembly 5, a meter case 6, a meter case joint 7, a cross spring element 8, a push rod 9, a diaphragm 10, a diaphragm 11, a sealing washer 12, a pressure gauge joint 13, a positioning clamping groove 14, a positioning part 15, an upper interface 16 and an inner step 17.

Detailed Description

Fig. 1 to 3 show a specific embodiment of a novel forked spring type pressure gauge according to the present invention, which comprises a case 6, an indicating mechanism, and a pressure gauge joint 13, wherein the indicating mechanism comprises a movement assembly 5, a dial 4, and a pointer 3, the movement assembly 5 and the dial 4 are installed in the case 6, the pointer 3 is installed on the movement assembly 5 and is covered by a watch glass 2 and a watch cover 1 fixed with the case 6, the case 6 is provided with a case joint 7, the case joint 7 is provided with a forked spring element 8 connected with the movement assembly 5, a pressure channel of the pressure gauge joint 13 is provided with an inner step 17 and an upper interface 16, the inner step 17 is sequentially provided with a base of a diaphragm 11, a diaphragm 10 and the forked spring element 8 and is tightly fixed with the upper interface 16 through the case joint 7 by screw thread connection, a push rod 9 is arranged between the forked spring element 8 and the diaphragm 11, one end of the ejector rod 9 is abutted against the jaw of the fork spring element 8, the other end of the ejector rod penetrates through the central hole of the diaphragm 10 and is abutted against the diaphragm 11, the diaphragm 11 mainly plays a role in transferring pressure and isolating working media, and the diaphragm 10 mainly plays a role in improving the mechanical strength of the diaphragm 11 and protecting the diaphragm 11.

In order to facilitate the isolation and sealing of the working medium, a sealing gasket 12 is arranged between the plane of the inner step 17 and the diaphragm 11, and the sealing gasket 12 is a copper gasket.

In order to facilitate the installation and fixation of the fork spring element 8, a positioning slot 14 is arranged on the case joint 7, and a positioning part 15 which is tightly matched with the positioning slot 14 to prevent rotation is arranged on the fork spring element 8.

In order to facilitate the installation and the disassembly, the pressure gauge joint 13 is a hexagonal joint, the lower part of the pressure gauge joint is provided with external threads which are consistent with the existing spring tube type pressure gauge and used for installation, and the existing spring tube type pressure gauge can be comprehensively replaced.

The utility model discloses during operation working medium extrudees

diaphragm

11, and 11 top pushes away ejector pin 9 of diaphragm, ejector pin 9 with diaphragm 11's thrust transmission roof pressure fork spring component 8, fork spring component 8 opens and drives movement assembly 6, and movement assembly 6 drives pointer 3 and rotates and display pressure, and working medium is because receive diaphragm 11 to keep apart not getting into the manometer, therefore the manometer is not influenced by measuring medium, can be applied to in any environment.

The above, it is only the specific embodiment of the present invention, it is not right the present invention makes any restriction in form, without departing from the technical solution of the present invention, the simple modification, equivalent change or modification made all fall into the protection scope of the present invention.

Claims

1. The utility model provides a novel manometer of fork spring formula, includes watchcase (6), indicating mechanism, pressure tap (13), characterized by: watchcase (6) on be equipped with watchcase joint (7), watchcase joint (7) are gone up and are installed fork spring component (8) of being connected with indicating mechanism, pressure channel that pressure gauge connects (13) is last to be equipped with interior step (17) and last interface (16), install diaphragm (11) on interior step (17) in proper order, the base of diaphragm (10) and fork spring component (8), and it is fixed to compress tightly with last interface (16) cooperation through watchcase joint (7), be equipped with ejector pin (9) between fork spring component (8) and diaphragm (11), the one end top of ejector pin (9) is on the fork mouth of fork spring component (8), the other end passes the centre bore top of diaphragm (10) on diaphragm (11).

2. The cross spring type pressure gauge as claimed in claim 1, wherein: and a sealing gasket (12) is arranged between the plane of the inner step (17) and the diaphragm (11).

3. The novel pressure gauge of claim 1 or 2, further comprising: the shell joint (7) is provided with a positioning clamping groove (14), and the fork spring element (8) is provided with a positioning part (15) which is tightly matched with the positioning clamping groove (14) to prevent rotation.

4. The novel cross spring pressure gauge as claimed in claim 3, wherein: the pressure gauge joint (13) is a hexagonal joint, and the lower part of the pressure gauge joint is provided with an external thread for installation.