CN210953217U

CN210953217U - Explosion-proof pressure transmitter

Info

Publication number: CN210953217U
Application number: CN201921891521.5U
Authority: CN
Inventors: 李国�
Original assignee: Shandong Zhongzi Instrument Measurement And Control Technology Co ltd
Current assignee: Shandong Zhongzi Instrument Measurement And Control Technology Co ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-07-07
Anticipated expiration: 2029-11-05

Abstract

The utility model discloses an explosion-proof formula pressure transmitter, include: changer body and closing device, closing device install the changer body advance press mouthful position and with changer body fixed connection, be equipped with the mounting groove that link up in the middle of the closing device, the changer body passes from the mounting groove to advance to press mouthful to be located the mounting groove, the closing device lower surface is equipped with the blind hole, the blind hole is located the mounting groove both sides, is equipped with the spring in the blind hole, the spring top is equipped with solenoid, the ejector pad is connected to the spring below, the ejector pad has magnetism, and the ejector pad is located the blind hole, the closing device below is equipped with the closing plate, closing plate and ejector pad fixed connection. The utility model discloses a set up closing means drawing the pressure mouth, can be when danger such as external environment blasting takes place, the closed pressure mouth that draws prevents inside the hazardous medium entering transformer body in the environment, can effectively avoid the changer body to take place to damage.

Description

Explosion-proof pressure transmitter

Technical Field

The utility model relates to a pressure transmitter technical field specifically is an explosion-proof type pressure transmitter.

Background

A pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. In an industrial environment with high proportion of dust, inflammable and explosive gas, steam or vaporous combustible substances, if a pressure transmitter without an explosion-proof function is used, short circuit or explosion accidents are easily caused by water or dust entering the pressure transmitter, hidden dangers are buried for safe production, and an explosion-proof product is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof formula pressure transmitter to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an explosion-proof pressure transmitter comprising: changer body and closing device, closing device install the changer body advance press mouthful position and with changer body fixed connection, be equipped with the mounting groove that link up in the middle of the closing device, the changer body passes from the mounting groove to advance to press mouthful to be located the mounting groove, the closing device lower surface is equipped with the blind hole, the blind hole is located the mounting groove both sides, is equipped with the spring in the blind hole, the spring top is equipped with solenoid, the ejector pad is connected to the spring below, the ejector pad has magnetism, and the ejector pad is located the blind hole, the closing device below is equipped with the closing plate, closing plate and ejector pad fixed connection.

As a further aspect of the present invention: and the closing plate is provided with a plug matched with the mounting groove at the corresponding position of the mounting groove.

As a further aspect of the present invention: the height of the plug is smaller than the maximum telescopic amount of the spring.

As a further aspect of the present invention: the sealing device is characterized in that a sealing groove is formed in the lower surface of the sealing device between the mounting groove and the blind hole, a sealing ring is arranged in the sealing groove, and a boss matched with the sealing groove is arranged on the sealing plate.

As a further aspect of the present invention: the transmitter body is provided with a vibration sensor, the vibration sensor is connected with a controller, and pins of the controller are connected into a power circuit of the electromagnetic coil.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a draw at the changer body and press the mouth to set up closing means, can be when dangerous changes such as external environment blasting take place, the mouth is pressed to the closure, prevents inside the hazardous medium among the environment gets into the transformer body, can effectively avoid the changer body to take place to damage, makes the changer body have explosion-proof function, does not receive external environment to change the influence.

Drawings

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

Fig. 2 is a schematic view of the connection between the middle sealing device and the sealing plate of the present invention when the spring is under tension.

Fig. 3 is a schematic view of the connection between the middle sealing device and the sealing plate of the present invention when the spring is in a compressed state.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, in an embodiment of the present invention, an explosion-proof pressure transmitter includes: changer body 1 and closing device 2, closing device 2 is the cylinder shape, installs and advances to press mouthful position and with changer body 1 fixed connection at changer body 1, be equipped with the mounting groove that link up in the middle of closing device 2, changer body 1 passes from the mounting groove to advance to press mouthful to be located the mounting groove, advance to press mouthful to leave one section distance to closing device 2 lower surface, closing device 2 lower surface is equipped with the blind hole, the blind hole is located the mounting groove both sides, is equipped with spring 22 in the blind hole, spring 22 top is equipped with solenoid 21, ejector pad 23 is connected to spring 22 below, ejector pad 23 has magnetism to ejector pad 23 is located the blind hole, closing device 2 below is equipped with closing plate 3, closing plate 3 and ejector pad 23 fixed connection.

The transmitter body 1 is provided with a vibration sensor 11, the vibration sensor 11 is processed by a signal processing circuit and then connected to a controller (refer to a vibration sensor application circuit schematic diagram) after A/D conversion, a controller pin is connected to a power circuit of the electromagnetic coil 21 and used for controlling the on-off of a power supply of the electromagnetic coil 21, when an external environment explodes, the vibration sensor 11 detects impact force to trigger the electromagnetic coil 21 to be electrified, the electromagnetic coil 21 can generate a magnetic field attracted with the push block 23 to attract the push block 23 to move upwards until the upper surface of the sealing plate 3 is attached to the lower surface of the sealing device 2, at the moment, the spring 22 is extruded, a pressure leading port of the transmitter body 1 is sealed by the sealing plate 3, and external dangerous media cannot enter the transmitter body 1.

The closing plate 3 is provided with a plug 31 matched with the mounting groove at the corresponding position of the mounting groove, the height of the plug 31 is smaller than the expansion amount of the spring 22, when the closing plate 3 is attached to the closing device 2, the plug 31 can plug the mounting groove to prevent harmful gas from entering, and when the electromagnetic coil 21 is powered off, the push block 23 which loses magnetic field attraction can move downwards under the action of gravity, at the moment, the spring 22 is stretched, the closing plate 3 moves downwards, the plug 31 leaves the mounting groove, and because the height of the plug 31 is smaller than the expansion amount of the spring 22, a channel can be formed between the closing plate 3 and the closing device 2 to allow a detected medium to enter a pressure inlet.

The lower surface of the sealing device 2 is provided with a sealing groove between the mounting groove and the blind hole, a sealing ring 321 is arranged in the sealing groove, a boss 32 matched with the sealing groove is arranged on the sealing plate 3, when the sealing plate 3 is attached to the sealing device 2, the boss 32 can be buckled with the sealing groove, the sealing ring 321 is extruded to form a closed space, the sealing performance of the sealing plate 3 can be effectively improved, and the transmitter body 1 can be better isolated from an external medium.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An explosion-proof pressure transmitter comprising: changer body (1) and closing means (2), its characterized in that: closing device (2) install advance pressure mouthful position and with changer body (1) fixed connection at changer body (1), be equipped with the mounting groove that link up in the middle of closing device (2), changer body (1) passes from the mounting groove to advance to press mouthful to be located the mounting groove, closing device (2) lower surface is equipped with the blind hole, the blind hole is located the mounting groove both sides, is equipped with spring (22) in the blind hole, spring (22) top is equipped with solenoid (21), ejector pad (23) are connected to spring (22) below, ejector pad (23) have magnetism to ejector pad (23) are located the blind hole, closing device (2) below is equipped with closing plate (3), closing plate (3) and ejector pad (23) fixed connection.

2. An explosion proof pressure transmitter as defined in claim 1, wherein: and a plug (31) matched with the mounting groove is arranged at the corresponding position of the mounting groove of the closing plate (3).

3. An explosion proof pressure transmitter as claimed in claim 2, wherein: the height of the plug (31) is smaller than the maximum expansion amount of the spring (22).

4. An explosion proof pressure transmitter as claimed in claim 3, wherein: the lower surface of the sealing device (2) is provided with a sealing groove between the mounting groove and the blind hole, a sealing ring (321) is arranged in the sealing groove, and a boss (32) matched with the sealing groove is arranged on the sealing plate (3).

5. An explosion proof pressure transmitter as defined in claim 1, wherein: the transmitter body (1) is provided with a vibration sensor (11), the vibration sensor (11) is connected with a controller, and pins of the controller are connected to a power circuit of the electromagnetic coil.