High-stability pressure transmitter

Abstract

The utility model provides a high-stability pressure transmitter, which is structurally characterized in that a base is positioned at the end part of one side of the pressure transmitter, and the base is provided with an internal cavity; the shell main body is in threaded connection with the base; the four-core plug-in is in threaded connection with the shell body in the direction away from the base. The pressure-sensitive element is arranged in the inner cavity of the base, and the pressure-sensitive element and the side wall of the inner cavity of the base are sealed through a sealing piece; the locking ring is arranged on one side, close to the four-core plug-in, of the pressure-sensitive element; the signal amplifier is fixedly arranged in the shell body and located on the side, away from the pressure-sensitive element, of the locking ring, and the signal amplifier is in wiring connection with the pressure-sensitive element. The sealing isolation pad is fixedly arranged between the four-core plug-in unit and the shell main body; according to the pressure transmitter, it can be guaranteed that functional elements in the pressure transmitter are not interfered by external additional factors, and the operation stability of the pressure transmitter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure transmitters, in particular to a high-stability pressure transmitter. Background Art

[0002] The pressure transmitter is mainly composed of three parts: pressure element sensor, measurement circuit and process connection. It can convert the physical pressure parameters of gas, liquid, etc. sensed by the pressure element sensor into standard electrical signals to supply secondary instruments such as indicator alarms, recorders, regulators, etc. for measurement, indication and process regulation. However, the pressure transmitters currently sold on the market generally have technical problems such as unsatisfactory stability.

[0003] Therefore, it is urgent to propose a high-stability pressure transmitter to solve the technical problem that current pressure transmitters generally have unsatisfactory stability. Utility Model Content

[0004] Aiming at the technical problem that pressure transmitters in the prior art generally have unsatisfactory stability, the utility model proposes a high-stability pressure transmitter.

[0005] In a preferred embodiment of the present utility model, a high-stability pressure transmitter is provided, and the pressure transmitter comprises:

[0006] A base, the base is located at one end of the pressure transmitter, and the base has an internal cavity;

[0007] A shell body, wherein the shell body is threadedly connected to the base;

[0008] A four-core plug-in, wherein the four-core plug-in is threadedly connected to the shell body in a direction away from the base;

[0009] A pressure-sensitive element, wherein the pressure-sensitive element is disposed in the inner cavity of the base, and the pressure-sensitive element and the side wall of the inner cavity of the base are sealed by a sealing member;

[0010] A locking ring, the locking ring being arranged on a side of the pressure-sensitive element close to the four-core plug-in unit to press the pressure-sensitive element tightly against the inner cavity of the base;

[0011] A signal amplifier, the signal amplifier is fixedly arranged in the shell body and is located on a side of the locking ring away from the pressure-sensitive element, and the signal amplifier is connected to the pressure-sensitive element by wiring;

[0012] A sealing gasket, the sealing gasket is fixedly arranged between the four-core plug-in and the shell body;

[0013] in,

[0014] A pressure-inducing hole is provided on the side of the base facing away from the shell body, and the pressure-inducing hole is in fluid communication with the pressure-sensitive element. A cable connected to the signal amplifier is passed through the sealing gasket, and a compression seal is formed between the cable and the sealing gasket. A first sealing ring is provided at the threaded connection between the base and the shell body.

[0015] Preferably, the signal amplifier and the pressure-sensitive element are electrically connected.

[0016] Preferably, the signal amplifier is arranged inside the insulating sleeve, and the insulating sleeve is arranged inside the shell body.

[0017] Preferably, the insulating sleeve is evacuated to isolate the signal amplifier from oxygen.

[0018] Preferably, a nut-shaped fastening kit is provided on the outer side of the base, and a second sealing ring is embedded in the middle position of the outer side of the base.

[0019] Preferably, the first sealing ring and / or the second sealing ring is a fluororubber sealing ring.

[0020] Preferably, the four-core plug-in base is provided with a vent hole penetrating the four-core plug-in, and the vent hole is connected to the outside atmosphere.

[0021] Preferably, a technical parameter nameplate is fixedly provided on the outer side of the shell body.

[0022] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0023] 1. A high-stability pressure transmitter of the present application is provided with multi-level seals, for example, the pressure-sensitive element and the side wall of the internal cavity of the base are sealed by a seal; the sealing gasket is fixed between the four-core plug-in and the shell body; the threaded connection portion between the base and the shell body is provided with a first sealing ring; a nut-shaped fastening kit is provided on the outside of the base, and a second sealing ring is embedded in the middle of the outside of the base; the setting of the above-mentioned sealing mechanism can ensure that the functional elements (signal amplifier and components electrically connected thereto) inside the pressure transmitter are not interfered by external additional factors, and can obtain more accurate detection results based on the fluid medium collected by the pressure-inducing hole;

[0024] 2. A high-stability pressure transmitter of the present application particularly arranges a signal amplifier inside an insulating sleeve, and the insulating sleeve is evacuated to isolate the signal amplifier from oxygen, thereby improving the operational stability of the pressure transmitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and their implementation methods.

[0026] Figure 1 A high stability pressure transmitter in one embodiment of the utility model is shown. DETAILED DESCRIPTION

[0027] The various aspects of the utility model are further described in detail below.

[0028] Unless otherwise defined or indicated, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein can be applied to the present invention.

[0029] Unless otherwise clearly specified and limited, the "or" mentioned in the present invention includes the relationship of "and". The "and" is equivalent to the Boolean logic operator "AND", the "or" is equivalent to the Boolean logic operator "OR", and "AND" is a subset of "OR".

[0030] It is to be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, the first element may be referred to as the second element without departing from the teachings of the present invention.

[0031] In the present invention, the terms “mainly composed of” and “consisting of” are included in the terms “containing”, “including” or “comprising”.

[0032] Unless otherwise clearly specified and limited, the terms "connected", "connected" and "connection" in the present invention should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] For example, if an element (or component) is referred to as being on, coupled to, or connected to another element, the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intervening elements between them. In contrast, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, then no intervening elements are indicated. Other words used to describe the relationship between elements should be similarly interpreted, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," and the like.

[0034] It should also be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The words "inner" and "outer" used refer to directions toward or away from the geometric center of a particular component, respectively. It can be understood that these terms are used here to describe the relationship of one element, layer or region relative to another element, layer or region as shown in the drawings. In addition to the orientations described in the drawings, these terms should also include other orientations of the device.

[0035] Other aspects of the present invention will be apparent to those skilled in the art from the disclosure herein.

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0037] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show the components related to the present application and are not drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation may be changed arbitrarily, and the component layout may also be more complicated. For example, the thickness of the components in the drawings may be exaggerated for the sake of clarity.

[0038] Example

[0039] As attached Figure 1 As shown, the utility model realizes a high-stability pressure transmitter, and the pressure transmitter comprises:

[0040] A base 3, the base 3 is located at one end of the pressure transmitter, and the base 3 has an internal cavity;

[0041] A shell body 6, wherein the shell body 6 is threadedly connected to the base 3;

[0042] A four-core plug-in 9, wherein the four-core plug-in 9 is threadedly connected to the housing body 6 in a direction away from the base 3;

[0043] A pressure-sensitive element 1, wherein the pressure-sensitive element 1 is disposed in the inner cavity of the base 3, and the pressure-sensitive element 1 is sealed with a side wall of the inner cavity of the base 3 by a sealing member;

[0044] A locking ring 4, wherein the locking ring 4 is arranged on a side of the pressure-sensitive element 1 close to the four-core plug-in 9, so as to press the pressure-sensitive element 1 tightly against the inner cavity of the base 3;

[0045] A signal amplifier 2, wherein the signal amplifier 2 is fixedly disposed in the housing body 6 and is located on a side of the locking ring 4 away from the pressure-sensitive element 1, and the signal amplifier 2 is wired and connected to the pressure-sensitive element 1;

[0046] A sealing gasket, which is fixed between the four-core plug-in 9 and the shell body 6;

[0047] in,

[0048] A pressure-inducing hole is provided on the side of the base 3 facing away from the shell body 6, and the pressure-inducing hole is fluidically connected to the pressure-sensitive element 1. A cable connected to the signal amplifier 2 is passed through the sealing gasket, and the cable and the sealing gasket are compressed and sealed. A first sealing ring 8 is provided at the threaded connection between the base 3 and the shell body 6.

[0049] As a preferred embodiment, the signal amplifier 2 is electrically connected to the pressure sensitive element 1 .

[0050] As a preferred embodiment, the signal amplifier 2 is disposed inside the insulating sleeve 5 , and the insulating sleeve 5 is disposed inside the shell body 6 .

[0051] As a preferred embodiment, the insulating sleeve 5 is evacuated to isolate the signal amplifier 2 from oxygen.

[0052] As a preferred embodiment, a nut-shaped fastening kit is provided on the outer side of the base 3, and a second sealing ring 7 is embedded in the middle of the outer side of the base.

[0053] As a preferred embodiment, the first sealing ring 8 and / or the second sealing ring 7 are fluororubber sealing rings.

[0054] As a preferred embodiment, the base of the four-core plug-in 9 is provided with a vent hole penetrating the four-core plug-in 9 , and the vent hole is connected to the outside atmosphere.

[0055] As a preferred embodiment, a technical parameter nameplate 10 is fixedly provided on the outer side of the shell body 6 .

[0056] When in use, the real-time pressure of the measured medium passing through the pressure inlet of the high-stability pressure transmitter will be transmitted to the pressure-sensitive element 1, and the output signal of the pressure-sensitive element 1 will be transmitted to the signal amplifier 2 through a silicone wire, and after being processed by the signal amplifier 2, it will be output by the cable connected to the signal amplifier 2 at the tail of the transmitter.

[0057] A high-stability pressure transmitter of the present application is provided with multi-level seals, for example, the pressure-sensitive element and the side wall of the internal cavity of the base are sealed by a seal; the sealing gasket is fixed between the four-core plug-in and the shell body; the threaded connection part between the base and the shell body is provided with a first sealing ring; a nut-shaped fastening kit is provided on the outside of the base, and a second sealing ring is embedded in the middle position of the outside of the base; the setting of the above-mentioned sealing mechanism can ensure that the functional elements inside the pressure transmitter (signal amplifier and components electrically connected to it) are not interfered by additional external factors, and can obtain more accurate detection results based on the fluid medium collected by the pressure-inducing hole; in addition, a high-stability pressure transmitter of the present application specifically arranges the signal amplifier inside the insulating sleeve, and the insulating sleeve is evacuated to isolate the signal amplifier from oxygen, thereby improving the operational stability of the pressure transmitter.

[0058] Based on this application, it should be understood by those skilled in the art that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0059] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

[0060] All documents mentioned in this utility model are cited as references in this application, just as each document is cited as reference separately. In addition, it should be understood that after reading the above content of this utility model, those skilled in the art can make various changes or modifications to this utility model, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A high stability pressure transmitter, characterized in that: The pressure transmitter comprises: A base, the base is located at one end of the pressure transmitter, and the base has an internal cavity; A shell body, wherein the shell body is threadedly connected to the base; A four-core plug-in, wherein the four-core plug-in is threadedly connected to the shell body in a direction away from the base; A pressure-sensitive element, wherein the pressure-sensitive element is disposed in the inner cavity of the base, and the pressure-sensitive element and the side wall of the inner cavity of the base are sealed by a sealing member; A locking ring, the locking ring being arranged on a side of the pressure-sensitive element close to the four-core plug-in unit to press the pressure-sensitive element tightly against the inner cavity of the base; A signal amplifier, the signal amplifier is fixedly arranged in the shell body and is located on a side of the locking ring away from the pressure-sensitive element, and the signal amplifier is connected to the pressure-sensitive element by wiring; A sealing gasket, the sealing gasket is fixedly arranged between the four-core plug-in and the shell body; in, A pressure-inducing hole is provided on the side of the base facing away from the shell body, and the pressure-inducing hole is in fluid communication with the pressure-sensitive element. A cable connected to the signal amplifier is passed through the sealing gasket, and a compression seal is formed between the cable and the sealing gasket. A first sealing ring is provided at the threaded connection between the base and the shell body.

2. A high stability pressure transmitter as claimed in claim 1, characterized in that: The signal amplifier is electrically connected to the pressure sensitive element.

3. A high stability pressure transmitter as claimed in claim 2, characterized in that: The signal amplifier is arranged inside the insulating sleeve, and the insulating sleeve is arranged inside the shell body.

4. A high stability pressure transmitter as claimed in claim 3, characterized in that: The insulating sleeve is evacuated to isolate the signal amplifier from oxygen.

5. A high stability pressure transmitter as claimed in claim 4, characterized in that: A nut-shaped fastening kit is arranged on the outer side of the base, and a second sealing ring is embedded in the middle part of the outer side of the base.

6. A high stability pressure transmitter as claimed in claim 5, characterized in that: The first sealing ring and / or the second sealing ring is a fluororubber sealing ring.

7. A high stability pressure transmitter as claimed in claim 6, characterized in that: The four-core plug-in base is provided with a vent hole penetrating the four-core plug-in, and the vent hole is communicated with the outside atmosphere.

8. A high stability pressure transmitter as claimed in claim 7, characterized in that: A technical parameter nameplate is fixedly arranged on the outer side of the shell body.

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