Pressure transmitter based on glue filling sealing

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; one end of the shell main body is in threaded connection with the base, and the other end is reduced; 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 reducing arrangement of the shell main body, of the pressure-sensitive element, so that the pressure-sensitive element is tightly pressed in the inner cavity of the base; the signal amplifier is sealed and fixedly arranged in an insulation sleeve arranged in the shell main body through glue pouring, the signal amplifier is 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 waterproof air guide cable extends out from the reducing side of the shell main body and is in sealing contact with the reducing side of 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, and particularly relates to a pressure transmitter based on potting seal. Background Art

[0002] A pressure transmitter mainly consists of three parts: a pressure measuring element sensor, a measuring circuit, and a process connector. It can convert physical pressure parameters such as gas and liquid sensed by the pressure measuring element sensor into standard electrical signals to supply secondary instruments such as indicating alarm instruments, recorders, and regulators for measurement, indication, and process adjustment. However, currently, pressure transmitters sold on the market generally directly install functional components integrated with a signal amplifier circuit on the pressure transmitter without setting additional protection mechanisms for them. This easily leads to the risk that the functional components integrated with the signal amplifier circuit are affected by environmental media in their operating performance, and further leads to poor working stability of the pressure transmitter.

[0003] Therefore, it is urgent to propose a pressure transmitter based on potting seal to solve the technical problems existing in the prior art. Summary of the Utility Model

[0004] Aiming at the technical problem that currently, pressure transmitters sold on the market generally directly install functional components integrated with a signal amplifier circuit on the pressure transmitter without setting additional protection mechanisms for them. This easily leads to the risk that the functional components integrated with the signal amplifier circuit are affected by environmental media in their operating performance, and further leads to poor working stability of the pressure transmitter. The utility model proposes a pressure transmitter based on potting seal.

[0005] In a preferred embodiment of the utility model, a pressure transmitter based on potting seal is provided, and the pressure transmitter includes:

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

[0007] A housing main body, one end of the housing main body is threadedly connected to the base, and the other end is provided with a reduced diameter;

[0008] A pressure sensitive element, the pressure sensitive element is arranged in the internal cavity of the base, and the pressure sensitive element and the side wall of the internal cavity of the base are sealed by a seal;

[0009] A locking ring, the locking ring is arranged on the side of the pressure sensitive element close to the reduced diameter of the housing main body to press the pressure sensitive element tightly in the internal cavity of the base;

[0010] A signal amplifier, which is fixedly arranged inside an insulating sleeve provided in the housing main body. The signal amplifier is located on the side of the locking ring away from the pressure-sensitive element, and the signal amplifier is connected to the pressure-sensitive element by wiring.

[0011] A waterproof and gas-conducting cable, which extends out from the side of the housing main body with a reduced diameter and is in sealed contact with the side of the housing main body with a reduced diameter.

[0012] Among them,

[0013] A pressure-introducing hole is provided on the side of the base away from the housing main body. The pressure-introducing hole is in fluid communication with the pressure-sensitive element. The waterproof and gas-conducting cable is connected to the signal amplifier. A first sealing ring is provided at the threaded connection part between the base and the housing main body. The inside of the insulating sleeve is filled with a sealing glue that isolates the signal amplifier from the atmosphere.

[0014] Preferably, the signal amplifier and the pressure-sensitive element are electrically connected by wiring.

[0015] Preferably, the sealing glue for isolating the signal amplifier from the atmosphere is epoxy resin.

[0016] Preferably, a nut-shaped fastening kit is provided on the outside of the base, and a second sealing ring is embedded at the middle position on the outside of the base.

[0017] Preferably, the first sealing ring and / or the second sealing ring is a fluororubber sealing ring.

[0018] Preferably, a hollow pressing screw is provided on the inner wall of the side of the housing main body with a reduced diameter, and the waterproof and gas-conducting cable passes through the hollow pressing screw.

[0019] Preferably, a rubber sealing pad and a metal washer are provided between the waterproof and gas-conducting cable and the hollow pressing screw.

[0020] Preferably, a rubber sleeve is sleeved on the outer wall of the side of the housing main body with a reduced diameter.

[0021] Preferably, a technical parameter nameplate is fixedly provided on the outside of the housing main body.

[0022] Compared with the prior art, the following beneficial effects can be obtained by the present utility model:

[0023] 1. A highly stable pressure transmitter of the present application is provided with multi-level seals. For example, the piezoresistive element is sealed with the side wall of the inner cavity of the base through a seal; a first sealing ring is provided at the threaded connection part between the base and the housing body; a nut-shaped fastening kit is arranged outside the base, and a second sealing ring is embedded at the middle position outside the base; a rubber gasket and a metal washer are arranged between the waterproof and air-conducting cable and the hollow compression screw. The setting of the above sealing mechanism can ensure that the functional elements (signal amplifiers and components electrically connected thereto) inside the pressure transmitter are not interfered by external additional factors, and more accurate detection results can be obtained based on the fluid medium collected at the sampling port;

[0024] 2. A highly stable pressure transmitter of the present application particularly arranges the signal amplifier inside the insulating sleeve, and a sealing glue that isolates the signal amplifier from the atmosphere is poured into the insulating sleeve, thereby improving the operating stability and service life of the pressure transmitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners in a clear and understandable manner in combination with the drawings of the preferred embodiments.

[0026] Figure 1 Fig. shows a pressure transmitter based on glue pouring and sealing in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following further details each aspect of the present invention.

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

[0029] Unless otherwise clearly specified and limited, the "or" described 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 can be understood that although terms such as "first", "second", etc. can 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. Therefore, the first element can be called the second element without departing from the teachings of the concept of the present invention.

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

[0032] Unless otherwise clearly defined and limited, the terms "connected", "communicated with", and "coupled" of the present utility model shall be understood in a broad sense. For example, it may be a fixed connection, or may be connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, 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 another element, coupled with another element, or connected to another element, then the said element may be directly formed on, coupled with, or connected to the said another element, or there may be one or more intermediate elements between them. On the contrary, if the expressions "directly on...", "directly coupled with...", and "directly connected with..." are used herein, it means that there is no intermediate element. Other words used to describe the relationship between elements should be interpreted similarly, such as "between..." and "directly between...", "attached" and "directly attached", "adjacent" and "directly adjacent", and so on.

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

[0035] Other aspects of the present utility model will be obvious to those of ordinary skill in the art based on the disclosure herein.

[0036] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will describe the specific embodiments of the present utility model with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can also be obtained.

[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 pressure transmitter based on glue potting and sealing, and the pressure transmitter includes:

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

[0041] A shell body 6, one end of which is threadedly connected to the base 3, and the other end of which is reduced in diameter;

[0042] 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;

[0043] A locking ring 4, wherein the locking ring 4 is arranged on a side of the pressure-sensitive element 1 close to the reduced diameter of the housing body 6, so as to press the pressure-sensitive element 1 tightly against the inner cavity of the base 3;

[0044] A signal amplifier 2, wherein the signal amplifier 2 is fixedly mounted inside the insulating sleeve 5 provided in the housing body 6, the signal amplifier 2 is located on a side of the locking ring 4 away from the pressure-sensitive element 1, and the signal amplifier 2 is connected to the pressure-sensitive element 1 by wiring;

[0045] A waterproof gas-conducting cable 13, the waterproof gas-conducting cable 13 extends from the side of the housing body 6 where the diameter is reduced, and is in sealing contact with the side of the housing body 6 where the diameter is reduced;

[0046] in,

[0047] 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. The waterproof gas-conducting cable 13 is connected to the signal amplifier 2. A first sealing ring 12 is provided at the threaded connection portion between the base 3 and the shell body 6, and the insulating sleeve 5 is filled with a sealant that isolates the signal amplifier 2 from the atmosphere.

[0048] As a preferred embodiment, the signal amplifier 2 is electrically connected to the pressure sensitive element 1 .

[0049] As a preferred embodiment, the sealant for isolating the signal amplifier 2 from the atmosphere is epoxy resin.

[0050] It should be noted that by filling the epoxy resin sealant inside the insulating sleeve 5 and potting and sealing the signal amplifier 2 in the epoxy resin sealant, the signal amplifier 2 can be completely isolated from the external environment, thus extending the service life of the signal amplifier 2.

[0051] As a preferred embodiment, a nut-shaped fastening kit is provided on the outer side of the base 3, and a second sealing ring 11 is embedded at the middle position on the outer side of the base.

[0052] As a preferred embodiment, the first sealing ring 12 and / or the second sealing ring 11 is a fluororubber sealing ring.

[0053] As a preferred embodiment, a hollow compression screw 9 is provided on the inner wall of the side where the housing body is reduced in diameter, and the waterproof and gas-conducting cable 13 passes out from inside the hollow compression screw 9.

[0054] As a preferred embodiment, a rubber gasket 7 and a metal washer 8 are provided between the waterproof and gas-conducting cable 13 and the hollow compression screw 9.

[0055] As a preferred embodiment, a rubber sleeve 10 is sleeved on the outer wall of the side where the housing body 6 is reduced in diameter.

[0056] It should be noted that the use of the rubber sleeve 10 can prevent the waterproof and gas-conducting cable 13 from being damaged due to excessive bending at the top of the transmitter.

[0057] As a preferred embodiment, a technical parameter nameplate 14 is fixedly provided on the outer side of the housing body 6.

[0058] During use, the real-time pressure of the measured medium passing through the pressure-introducing hole of the pressure transmitter based on potting and sealing will be transmitted to the pressure-sensitive element 1. The output signal of the pressure-sensitive element 1 is transmitted to the signal amplifier 2 through a silica gel wire and output by the waterproof and gas-conducting cable 13 at the tail of the transmitter after being processed by the signal amplifier 2.

[0059] A highly stable pressure transmitter of the present application is provided with multi-level sealing. For example, the side wall of the inner cavity of the pressure-sensitive element and the base is sealed by a seal; a first sealing ring is provided at the threaded connection part of the base and the housing body; a nut-shaped fastening kit is provided outside the base, and a second sealing ring is embedded in the middle position outside the base; a rubber gasket and a metal gasket are provided between the waterproof and air-conducting cable and the hollow compression screw; the setting of the above sealing mechanism can ensure that the functional elements (signal amplifiers and components electrically connected thereto) inside the pressure transmitter are not interfered by external additional factors, and more accurate detection results can be obtained based on the fluid medium collected at the sampling port; in addition, a signal amplifier of a highly stable pressure transmitter of the present application is particularly arranged inside an insulating sleeve, and a sealing glue that isolates the signal amplifier from the atmosphere is poured into the insulating sleeve, thereby improving the operation stability and service life of the pressure transmitter.

[0060] Based on the present application, those skilled in the art should understand 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 aspects described herein can be used to implement the device and / or practice the method. In addition, this device can be implemented and this method can be practiced using other structures and / or functions in addition to one or more of the aspects described herein.

[0061] It should be noted that the above embodiments can be freely combined according to needs. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

[0062] All the documents mentioned in the present invention are cited in this application as references, just as each document is cited separately as a reference. In addition, it should be understood that after reading the above content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A pressure transmitter based on potting seal, 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, one end of which is threadedly connected to the base and the other end of which is reduced in diameter; 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 reduced diameter of the shell body, so as to press the pressure-sensitive element tightly against the inner cavity of the base; A signal amplifier, wherein the signal amplifier is fixedly mounted inside an insulating sleeve provided in the housing body, the signal amplifier is located on a side of the locking ring away from the pressure-sensitive element, and the signal amplifier is wired and connected to the pressure-sensitive element; A waterproof gas-conducting cable, the waterproof gas-conducting cable extending from the side of the housing body where the diameter is reduced and in sealing contact with the side of the housing body where the diameter is reduced; 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 fluidly connected to the pressure-sensitive element. The waterproof air-conducting cable is connected to the signal amplifier. A first sealing ring is provided at the threaded connection between the base and the shell body, and the insulating sleeve is filled with sealant to isolate the signal amplifier from the atmosphere.

2. The pressure transmitter based on potting seal as described in claim 1, characterized in that The signal amplifier is electrically connected to the pressure sensitive element.

3. The pressure transmitter based on potting seal according to claim 2, characterized in that, The sealant used to isolate the signal amplifier from the atmosphere is epoxy resin.

4. The pressure transmitter based on potting seal according to claim 3, 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.

5. The pressure transmitter based on potting seal according to claim 4, characterized in that, The first sealing ring and / or the second sealing ring is a fluororubber sealing ring.

6. The pressure transmitter based on potting seal according to claim 5, wherein, A hollow clamping screw is arranged on an inner wall of one side of the shell body with a reduced diameter, and the waterproof gas-conducting cable passes through the hollow clamping screw.

7. The pressure transmitter based on potting seal according to claim 6, wherein, A rubber sealing pad and a metal gasket are arranged between the waterproof air-conducting cable and the hollow compression screw.

8. The pressure transmitter based on potting seal according to claim 7, characterized in that, The outer wall of one side of the shell body with a reduced diameter is sleeved with a rubber sleeve.

9. The pressure transmitter based on potting seal according to claim 8, characterized in that, A technical parameter nameplate is fixedly arranged on the outer side of the shell body.

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