CN209820678U

CN209820678U - Easily clear stifled formula pressure transmitter

Info

Publication number: CN209820678U
Application number: CN201920913061.5U
Authority: CN
Inventors: 刘小明; 杜冲; 韩金盼; 张丽
Original assignee: Shengli Oilfield Haowei Trade LLC
Current assignee: Shengli Oilfield Haowei Trade LLC
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2019-12-20
Anticipated expiration: 2029-06-18

Abstract

The utility model discloses an easily clear stifled formula pressure transmitter, including changer casing, process joint and pressure sensor, the upper portion of process joint is connected with changer casing bottom, and the bottom of process joint is connected with the pipeline, is equipped with the holding chamber in the process joint, pressure sensor sets up in the upper end of holding chamber, and the bottom of process joint is equipped with the entry that is used for communicating holding chamber and pipeline inner chamber; an outer guide pipe is arranged on the side wall of the process joint between the pressure sensor and the outer wall of the pipeline, the accommodating cavity is communicated with the outside air through the outer guide pipe, and the end part of the outer guide pipe is connected with a one-way valve for preventing gas and liquid in the accommodating cavity from flowing out; under the condition that the transmitter is not required to be disassembled, blockage clearing of an inlet of the process connector is achieved, operation is simple and convenient, measurement accuracy of the transmitter is not affected, blockage clearing efficiency of the transmitter is improved, and the method has high practicability.

Description

Easily clear stifled formula pressure transmitter

Technical Field

The utility model relates to a pipeline type pressure transmitter technical field, concretely relates to easily clear stifled formula pressure transmitter.

Background

The pressure transmitter is a device for converting pressure into pneumatic signal or electric signal to control and remotely transmit, and can convert the physical pressure parameters of gas, liquid and the like sensed by the load cell sensor into standard electric signals to be supplied to secondary instruments such as indication alarm instruments, recording instruments, regulators and the like for measurement, indication and process regulation.

Among the prior art, because pressure sensor's the accurate measuring device that belongs to, for avoiding liquid or gaseous direct impact pressure sensor in the pipeline, the less that sets up the entry aperture that the process connects usually, however, gas or liquid in the pipeline are long to be accompanied by small solid impurity, and this makes the entry often blockked up by these impurity to influenced the measurement accuracy of changer, clear stifled at every turn all need pull down the changer, clear stifled operation, complex operation, clear stifled inefficiency.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the not enough of above-mentioned prior art existence, provide an easily clear stifled formula pressure transmitter, this device is under the condition of unnecessary dismantlement changer, realizes the clear stifled of the entrance that the process connects, and is easy and simple to handle, and does not influence the measurement accuracy of changer, has improved clear stifled efficiency of changer, has stronger practicality.

The utility model provides a technical scheme that its technical problem adopted is:

an easy-blockage-clearing type pressure transmitter comprises a transmitter shell, a process joint and a pressure sensor, wherein the upper part of the process joint is connected with the bottom of the transmitter shell, the bottom of the process joint is connected with a pipeline, a containing cavity is arranged in the process joint, the pressure sensor is arranged at the upper end of the containing cavity, the outer wall of the pressure sensor is in interference connection with the inner wall of the containing cavity, and an inlet for communicating the containing cavity with the inner cavity of the pipeline is arranged at the bottom end of the process joint; the process that is located between pressure sensor and the pipeline outer wall connects is equipped with outer skirt on the lateral wall, the holding chamber is through outer skirt and outside air intercommunication, the end connection of outer skirt has the check valve that prevents the holding intracavity gas-liquid outflow.

Preferably, the check valve is a check ball valve, and the one end that only can admit air or feed liquor is the entry end, and the one end that only can give vent to anger or go out liquid is the exit end, and the check valve includes valve body, spheroid, spring and sealing washer, spring, spheroid set gradually in the valve body to the entry end from the exit end, the valve body is cylinder tubular structure, is equipped with the limit stop who is used for restricting the spheroid to remove to the entry end in the valve body, spheroidal one end with limit stop connects, the other end with the one end of spring is connected, the other end and the sealing washer of spring are connected, the sealing washer outer wall with valve body interference is connected, the exit end and the outer pipe thread connection that.

Preferably, the outer guide pipe comprises a horizontal pipe and a vertical pipe, the vertical pipe is arranged in the vertical direction, the horizontal pipe is arranged in the horizontal direction, and the horizontal pipe and the vertical pipe are communicated through a bending structure, so that the inlet end of the check valve connected with the outer guide pipe is positioned below the outlet end.

Preferably, the inlet end of the one-way valve is in threaded connection with a sealing cover, and a sealing gasket is arranged in the sealing cover.

Preferably, a filter screen is arranged between the outer guide pipe and the accommodating cavity.

Preferably, the bottom of the process joint is in threaded connection with the pipeline, and the upper part of the process joint is in threaded connection with the transmitter shell; the inlet is internally provided with a damping nail used for adjusting the liquid passing amount, the bottom and the side face of the damping nail are provided with damping holes which are communicated with each other, gas and liquid in the pipeline enter through the damping holes at the bottom, and the gas and liquid enter into the accommodating cavity from the damping holes at the side face.

The utility model has the advantages that:

1. in a normal state, gas or liquid in the pipeline enters the accommodating cavity through the inlet, and the pressure in the pipeline is measured by the pressure sensor in the accommodating cavity; part of gas and liquid flows into the outer guide pipe, and the arrangement of the one-way valve prevents the gas and the liquid in the accommodating cavity from flowing outwards, so that the measurement precision of the pressure sensor is not influenced; when the pressure value that the changer surveyed is unusual, whether the entrance that at first should get rid of the process and connect had the jam condition, at this moment, the switch of pipeline at first is closed, then inject high-pressure gas into at the entry end of check valve through the air pump, high-pressure gas flows into the holding intracavity through outer skirt, until the pressure of holding intracavity is greater than pipeline internal pressure, be enough to make the plug of entrance spout to the pipeline in, under the condition of needn't dismantling the changer, realize the clear stifled of the entry that the process connects, the operation is simple and convenient, and do not influence the measurement accuracy of changer, the clear stifled efficiency of changer has been improved, and the practicality is strong.

2. The one-way interception function of the one-way valve is realized through the matching of the limit stop, the ball, the spring and the sealing ring, and in a normal state, the ball is limited at two ends by the spring and the limit stop, and the one-way valve is in an interception state; if high-pressure gas is introduced into the inlet end, the ball body is pushed to the outlet end by the high-pressure gas, and the spring is compressed, so that the high-pressure gas flows into the outer guide pipe through the sealing ring and flows into the accommodating cavity, and the high-pressure gas clears the inlet of the process connector.

3. The entry end of check valve is located the below of exit end, and the sealing connection between spheroid and the limit stop is strengthened to spheroidal self gravity of make full use of, guarantees the check valve effect that dams under the normal condition to further guarantee the measurement accuracy of changer.

4. Through set up sealed lid and sealing washer on the check valve, prevent that the gas or the liquid of holding intracavity are excessive, guarantee the measurement accuracy of changer.

5. Through set up the filter screen between outer skirt and holding chamber, the spheroid surface damage is avoided in the impurity entering check valve in the pipeline and the holding intracavity to the life-span of extension check valve.

6. Through set up the damping nail at the entry, prevent that gas or liquid in the pipeline from directly impacting pressure sensor, play effectual cushioning effect, extension pressure sensor life-span.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a right side view of FIG. 1

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

in the figure: 1. transmitter casing, 2, process joint, 21, holding chamber, 22, entry, 23, outer guide pipe, 24, filter screen, 3, pressure sensor, 4, check valve, 41, entry end, 42, exit end, 43, valve body, 431, limit stop, 44, spheroid, 45, spring, 46, sealing washer, 5, sealed lid.

Detailed Description

For a better understanding of the present invention, embodiments thereof are explained in detail below with reference to the accompanying drawings.

As shown in fig. 1-3, an easy blockage clearing type pressure transmitter comprises a transmitter housing 1, a process connector 2 and a pressure sensor 3, wherein the upper part of the process connector 2 is connected with the bottom of the transmitter housing 1, the bottom of the process connector 2 is connected with a pipeline, an accommodating cavity 21 is arranged in the process connector 2, the pressure sensor 3 is arranged at the upper end of the accommodating cavity 21, the outer wall of the pressure sensor 3 is in interference connection with the inner wall of the accommodating cavity 21, and an inlet 22 for communicating the accommodating cavity 21 with the inner cavity of the pipeline is arranged at the bottom end of the process connector 2; be located and be equipped with outer skirt 23 on the process joint 2 lateral wall between pressure sensor 3 and the pipeline outer wall, holding chamber 21 communicates with the outside air through outer skirt 23, the end connection of outer skirt 23 has the check valve 4 that prevents the interior gas-liquid outflow of holding chamber 21.

In a normal state, gas or liquid in the pipeline enters the accommodating cavity 21 through the inlet 22, and the pressure sensor 3 in the accommodating cavity 21 measures the pressure in the pipeline; part of gas and liquid flows into the outer guide pipe 23, and the arrangement of the one-way valve 4 prevents the gas and liquid in the accommodating cavity 21 from flowing outwards, so that the measurement precision of the pressure sensor 3 is not influenced; when the transmitter needs to perform blockage clearing operation, firstly, the switch of the pipeline is closed, then high-pressure gas is injected into the inlet end 41 of the one-way valve 4 through the air pump, the high-pressure gas flows into the accommodating cavity 21 through the outer guide pipe 23 until the pressure in the accommodating cavity 21 is greater than the pressure in the pipeline, and the blockage at the inlet 22 is sprayed into the pipeline, so that the blockage clearing of the inlet 22 of the process connector 2 is realized under the condition that the transmitter does not need to be disassembled, the operation is simple and convenient, the measurement precision of the transmitter is not influenced, the blockage clearing efficiency of the transmitter is improved, and the high practicability is high.

Check valve 4 is check ball valve, and the one end that only can admit air or the feed liquor is entry end 41, and the one end that only can give vent to anger or go out liquid is exit end 42, and check valve 4 includes valve body 43, spheroid 44, spring 45 and sealing washer 46, spring 45, spheroid 44 set gradually in valve body 43 from exit end 42 to entry end 41, valve body 43 is cylinder tubular structure, is equipped with in the valve body 43 to be used for restricting the limit stop 431 that spheroid 44 removed to entry end 41, spheroid 44 one end with limit stop 431 is connected, the other end with the one end of spring 45 is connected, the other end and the sealing washer 46 of spring 45 are connected, sealing washer 46 outer wall with valve body 43 interference connection, the exit end 42 and the outer pipe 23 threaded connection that draws of valve body 43.

The one-way interception function of the one-way valve 4 is realized through the matching of the limit stop 431, the ball 44, the spring 45 and the sealing ring 46, and in a normal state, the ball 44 is limited at two ends by the spring 45 and the limit stop 431, and the one-way valve 4 is in an interception state; when high-pressure gas is introduced into the inlet end 41, the ball 44 is pushed by the high-pressure gas toward the outlet end 42, and the spring 45 is compressed, so that the high-pressure gas flows into the outer lead pipe 23 through the sealing ring 46 and flows into the accommodating cavity 21, and the high-pressure gas clears the inlet 22 of the process connector 2.

The outer guide pipe 23 includes a horizontal pipe and a vertical pipe, the vertical pipe is disposed in the vertical direction, the horizontal pipe is disposed in the horizontal direction, and the horizontal pipe and the vertical pipe are communicated through a bent structure, so that the inlet end 41 of the check valve 4 connected to the outer guide pipe 23 is located below the outlet end 42.

The inlet end 41 of the check valve 4 is positioned below the outlet end 42, the self gravity of the ball 44 is fully utilized, the sealing connection between the ball 44 and the limit stop 431 is enhanced, the interception effect of the check valve 4 in a normal state is ensured, and the measurement precision of the transmitter is further ensured.

The inlet end 41 of the one-way valve 4 is in threaded connection with a sealing cover 5, and a sealing gasket is arranged in the sealing cover 5.

By arranging the sealing cover 5 and the sealing ring 46 on the one-way valve 4, gas or liquid in the accommodating cavity 21 is prevented from overflowing, and the measurement precision of the transmitter is ensured.

A filter screen 24 is arranged between the outer guide pipe 23 and the accommodating cavity 21.

By arranging the filter screen 24 between the outer guide pipe 23 and the accommodating cavity 21, impurities in the pipeline and in the accommodating cavity 21 enter the check valve 4, so that the surface damage of the ball 44 is avoided, and the service life of the check valve 4 is prolonged.

The bottom of the process joint 2 is in threaded connection with the pipeline, and the upper part of the process joint is in threaded connection with the transmitter shell 1; the inlet 22 is internally provided with a damping nail for adjusting the liquid passing amount, the bottom and the side surface of the damping nail are provided with damping holes which are communicated with each other, gas and liquid in the pipeline enter through the damping holes at the bottom, and enter into the accommodating cavity 21 from the damping holes at the side surface.

By arranging the damping pin at the inlet 22, gas or liquid in the pipeline is prevented from directly impacting the pressure sensor 3, an effective buffering effect is achieved, and the service life of the pressure sensor 3 is prolonged.

When the device is used, the transmitter is hermetically connected with a pipeline through the process connector 2, gas or liquid in the pipeline enters the accommodating cavity 21 through the inlet 22 under a normal state, and the pressure in the pipeline is measured by the pressure sensor 3 in the accommodating cavity 21; part of gas and liquid flows into the outer guide pipe 23, and the arrangement of the one-way valve 4 prevents the gas and liquid in the accommodating cavity 21 from flowing outwards, so that the measurement precision of the pressure sensor 3 is not influenced; when the clear stifled operation of needs carried out to the changer, at first close the switch of pipeline, then pour into high-pressure gas into at the entry end 41 of check valve 4 through the air pump, high-pressure gas flows into holding chamber 21 through outer admission pipe 23 in, until the pressure in holding chamber 21 is greater than the pipeline internal pressure, be enough to make the plug blowout of entry 22 department to the pipeline in, this device is under the condition of unnecessary dismantlement changer, realizes the clear stifled of entry 22 department that the process connects 2, and is easy and simple to handle, has improved the clear stifled efficiency of changer, has stronger practicality.

For those skilled in the art, based on the teachings of the present invention, changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An easy-blockage-clearing type pressure transmitter comprises a transmitter shell, a process joint and a pressure sensor, wherein the upper part of the process joint is connected with the bottom of the transmitter shell, the bottom of the process joint is connected with a pipeline, a containing cavity is arranged in the process joint, the pressure sensor is arranged at the upper end of the containing cavity, and an inlet for communicating the containing cavity with an inner cavity of the pipeline is formed in the bottom end of the process joint; the pressure sensor is characterized in that an outer guide pipe is arranged on the side wall of the process joint between the pressure sensor and the outer wall of the pipeline, the accommodating cavity is communicated with the outside air through the outer guide pipe, and the end part of the outer guide pipe is connected with a one-way valve for preventing gas and liquid in the accommodating cavity from flowing out.

2. The pressure transmitter of claim 1, wherein the check valve is a check ball valve, one end of the check valve capable of only inputting air or liquid is an inlet end, one end of the check valve capable of only outputting air or liquid is an outlet end, the check valve comprises a valve body, a ball, a spring and a sealing ring, the spring and the ball are sequentially arranged in the valve body from the outlet end to the inlet end, the valve body is of a cylindrical structure, a limit stop for limiting the ball to move towards the inlet end is arranged in the valve body, one end of the ball is connected with the limit stop, the other end of the ball is connected with one end of the spring, the other end of the spring is connected with the sealing ring, the outer wall of the sealing ring is in interference connection with the valve body, and the outlet end of the.

3. An easily unclogged pressure transmitter as claimed in claim 2, characterized in that the external lead pipe comprises a horizontal pipe and a vertical pipe, the vertical pipe is arranged in the vertical direction, the horizontal pipe is arranged in the horizontal direction, and the horizontal pipe and the vertical pipe are communicated through a bending structure, so that the inlet end of the check valve connected with the external lead pipe is positioned below the outlet end.

4. The pressure transmitter of claim 2 wherein the inlet end of the check valve is threadably connected to a seal cap, the seal cap having a seal gasket disposed therein.

5. The pressure transmitter of claim 1 wherein a filter screen is disposed between the outer lead tube and the receiving cavity.

6. The pressure transmitter of claim 1, wherein the inlet is provided with a damping pin for adjusting the amount of liquid passing through the inlet, the bottom and the side of the damping pin are provided with damping holes which are communicated with each other, and gas and liquid in the pipeline enter through the damping holes at the bottom and enter into the accommodating cavity from the damping holes at the side.