CN112444340B - Pressure measurement is with overlock device - Google Patents
Pressure measurement is with overlock device Download PDFInfo
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- CN112444340B CN112444340B CN201910827678.XA CN201910827678A CN112444340B CN 112444340 B CN112444340 B CN 112444340B CN 201910827678 A CN201910827678 A CN 201910827678A CN 112444340 B CN112444340 B CN 112444340B
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- overlock
- pipe
- liquid inlet
- inlet pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
Abstract
The invention provides a overlock device for pressure detection. The invention provides an overlock device for pressure detection, which comprises an overlock body, wherein the overlock body is provided with an upper end surface and a lower end surface which are opposite, the upper end surface and the lower end surface are respectively provided with a first interface and a second interface, the first interface is provided with an open cavity, a pressure probe of a pressure detection instrument is arranged at the open end of the cavity, and the second interface is connected on a pipeline; the overlock body is provided with a liquid inlet pipe and a return pipe at intervals in sequence along the flowing direction of fluid in the pipeline, the first end of the liquid inlet pipe and the first end of the return pipe are communicated with the pipeline, the second end of the liquid inlet pipe extends towards the pressure probe and has a gap with the pressure probe, and the second end of the return pipe is flush with the upper end face. The cocker device for pressure detection can prevent the pressure probe from freezing and failing at low temperature, and the accuracy of the pressure detection result is better.
Description
Technical Field
The invention relates to the technical field of pipeline pressure detection, in particular to a overlock device for pressure detection.
Background
In an oil and gas station, in order to detect the pressure of a process medium in each pipeline in a field area, pressure detectors are generally arranged on the process pipelines in different areas of the field area, and the pressure of the process medium is detected by the pressure detectors.
Pressure gauges are typically connected to process lines via gauge cocks, which may be selected to have different gauge sizes depending on the pressure rating of each process line. The pressure detector is provided with a pressure probe, and pressure detection of the process medium is completed by contacting and pressing the process medium in the process pipeline to deform the pressure probe. When the outside air temperature is reduced, the process medium at the blind end part of the interface between the instrument cocker and the pressure probe of the pressure detector is easy to cool and freeze or hydrate, and the process medium is frozen and expanded to generate higher pressure on the pressure probe, so that the pressure value detected by the pressure detector is obviously higher. The higher the pressure of the process medium is, the more easily the medium at the blind end of the interface forms hydrate when containing water, and further the pressure probe can be caused to fail or even be scrapped. At present, the problems are generally solved by an electric tracing and heat preservation mode, electric tracing is carried out between the overlock and the pressure probe for heat preservation, and the heat generated by the electric tracing can be completely utilized by the overlock blind end by adopting a mode that heat preservation cotton wraps a tracing band, so that the temperature of a process medium at the overlock blind end is increased, hydrates are not formed, and the pressure of the process medium detected by the pressure probe is ensured to be kept normal.
However, the problems are solved by adopting an electric tracing and heat preservation mode, and the problems of heavy heat preservation material and inconvenient use exist.
Disclosure of Invention
The invention provides a cocker device for pressure detection, which can prevent a pressure probe from failing and has better accuracy of a pressure detection result.
The invention provides a overlock device for pressure detection, which comprises an overlock body, wherein the overlock body is provided with an upper end surface and a lower end surface which are opposite, the upper end surface and the lower end surface are respectively provided with a first interface and a second interface, the first interface is provided with an open cavity, a pressure probe of a pressure detection instrument is arranged at the open end of the cavity, and the second interface is connected to a pipeline;
the overlock body is provided with a liquid inlet pipe and a return pipe at intervals in sequence along the flowing direction of fluid in the pipeline, the first end of the liquid inlet pipe and the first end of the return pipe are communicated with the pipeline, the second end of the liquid inlet pipe extends towards the pressure probe and has a gap with the pressure probe, and the second end of the return pipe is flush with the upper end face.
In a possible embodiment, the first end of the inlet conduit and the first end of the return conduit are provided with a first stop valve and a second stop valve, respectively, for controlling the opening and closing of the conduits.
In a possible implementation manner, the liquid inlet pipe is a straight pipe, and the extending direction of the liquid inlet pipe from the first end to the second end is the same as the axial direction of the overlock body and the first connector.
In a possible embodiment, the return pipe is a straight pipe with a direction of extension different from the axial direction of the jacket body, or the return pipe has a bent section.
In one possible embodiment, the liquid inlet pipe coincides with the central axis of the cavity of the first connection.
In a possible embodiment, the diameter of the inlet pipe is larger than the diameter of the return pipe.
In a possible implementation mode, the overlock body is also provided with a liquid discharge pipe, the first end of the liquid discharge pipe is communicated with the return pipe, and the second end of the liquid discharge pipe is positioned on the outer wall of the overlock body; the drain pipe is close to the second end of the return pipe, and the drain pipe is used for enabling fluid in the cavity to be discharged to the outside of the overlock body through the drain pipe after the first stop valve and the second stop valve are both closed.
In a possible embodiment, the second end of the drain pipe is detachably provided with a closure.
In a possible embodiment, the liquid inlet pipe is detachably arranged on the overlock body, and the liquid inlet pipe is a heat insulation pipe.
In one possible embodiment, the first shut-off valve and the second shut-off valve are both needle shut-off valves.
The invention provides an overlock device for pressure detection, which is connected between a pressure detector and a pipeline and comprises an overlock body, wherein the upper end surface and the lower end surface of the overlock body are respectively provided with a first interface and a second interface, the first interface is connected with the pressure detector, the second interface is connected on the pipeline, the first interface is provided with a cavity, one end of the first interface, which faces the pressure detector, is an open end, and a pressure probe of the pressure detector is arranged at the open end; the overlock body is provided with a liquid inlet pipe and a return pipe at intervals, the first end of the liquid inlet pipe is communicated with a pipeline, the second end of the liquid inlet pipe extends to the pressure probe, a gap is reserved between the liquid inlet pipe and the pressure probe, the second end of the return pipe is flush with the upper end face of the overlock body, the liquid inlet pipe and the return pipe are sequentially arranged at intervals according to the flowing direction of fluid in the pipeline, so that fluid can firstly enter the liquid inlet pipe from the first end of the liquid inlet pipe under the action of pressure difference, the fluid flowing out of the second end of the liquid inlet pipe can be contacted with the pressure probe and press the pressure probe, the pressure probe can accurately detect the pressure of the fluid, then the fluid flowing out of the second end of the liquid inlet pipe falls into a cavity of the first connector from two sides of the liquid inlet pipe and is contacted with the upper end face of the overlock body, and finally enters the return pipe through the second end of the return pipe on the upper end face of the overlock body, and flows back into the pipeline from the first end of the return pipe. Therefore, the temperature of the fluid in the liquid inlet pipe is high, even if the temperature of the external environment is low, the temperature of the fluid in the first interface cavity is reduced, because the temperature difference exists between the fluid in the liquid inlet pipe and the fluid in the cavity, the fluid with the high temperature in the liquid inlet pipe enters the cavity and can generate a pushing effect on the fluid in the cavity, the fluid in the cavity can smoothly flow back into a pipeline through the return pipe, the fluid can be prevented from being cooled and frozen or forming hydrate due to low temperature, the risk of failure of the pressure probe is reduced, and the detection accuracy of the pressure probe is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on the drawings without inventive labor.
Fig. 1 is an assembly view of a pressure detecting overlock device according to an embodiment of the present invention;
FIG. 2 is a plan view of a pressure detecting overlock device according to an embodiment of the present invention;
FIG. 3 is a schematic view of an assembly of another pressure detecting cocker according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a overlock body according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a liquid inlet pipe according to an embodiment of the present invention.
Description of the reference numerals:
1-overlock body; 11-a first interface; 12-a second interface; 13-a liquid inlet pipe; 131-a first stop valve; 132-a projection; 14-a return pipe; 141-a second stop valve; 15-liquid discharge pipe; 16-a closure; 17-internal screw thread; 2-a pressure probe; 3-pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of technical features indicated is implicitly. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Fig. 1 is an assembly schematic diagram of a cocker device for pressure detection according to an embodiment of the present invention; fig. 2 is a plan view of a pressure detecting overlock device according to an embodiment of the present invention; FIG. 3 is a schematic view of an assembly of another pressure detecting cocker according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of a jacket body according to an embodiment of the present invention; fig. 5 is a schematic structural view of a liquid inlet pipe according to an embodiment of the present invention.
As shown in fig. 1 to fig. 3, the present embodiment provides a pressure detection overlock device, which includes an overlock body 1, the overlock body 1 has an upper end face and a lower end face which are opposite to each other, the upper end face and the lower end face are respectively provided with a first interface 11 and a second interface 12, the first interface 11 has an open cavity, a pressure probe 2 of a pressure detection instrument is arranged at the open end of the cavity, and the second interface 12 is connected to a pipeline 3.
A liquid inlet pipe 13 and a return pipe 14 are sequentially arranged on the overlock body 1 at intervals along the flowing direction of fluid in the pipeline 3, the first end of the liquid inlet pipe 13 and the first end of the return pipe 14 are both communicated with the pipeline 3, the second end of the liquid inlet pipe 13 extends towards the pressure probe 2 and has a gap with the pressure probe 2, and the second end of the return pipe 14 is flush with the upper end face.
The cocking device for pressure detection (hereinafter abbreviated as cocking device) provided by the embodiment is used for being connected between a pressure detector and a pipeline 3, fluid in the pipeline 3 can be conveyed to the pressure detector through the cocking device, and the pressure of the fluid is detected through the pressure detector. When the fluid medium in the pipeline is in a static state, the cocking device can detect the pressure of the fluid medium by using the medium temperature difference as a driving force.
The overlock device mainly comprises an overlock body 1, the overlock body 1 is a main connecting and supporting structure of the overlock device, the overlock body 1 is provided with an upper end face and a lower end face which are oppositely arranged, the upper end face is opposite to the pressure detector, and the lower end face is opposite to the pipeline 3. The upper end face of the overlock body 1 is provided with a first interface 11, the lower end face of the overlock body 1 is provided with a second interface 12, and the overlock body 1 is connected with a pressure detector through the first interface 11 and is connected with the pipeline 3 through the second interface 12.
Specifically, one end of the first interface 11 of the overlock body 1 facing the pressure detector is an open end, the pressure probe 2 of the pressure detector is arranged on the open end, a liquid inlet pipe 13 and a return pipe 14 are arranged on the overlock body 1 at intervals, the liquid inlet pipe 13 and the return pipe 14 both penetrate through the upper end surface and the lower end surface of the overlock body 1, and the first end of the liquid inlet pipe 13 and the first end of the return pipe 14 both extend from the second interface 12 to the pipeline 3 and are communicated with the pipeline 3; the second end of the liquid inlet pipe 13 and the second end of the return pipe 14 are both communicated with the cavity of the first connector 11 of the overlock body 1. The fluid in the line 3 can thus be returned between the cavity of the first port 11 and the line 3 through the inlet pipe 13 and the return pipe 14 of the overlock body 1.
In order to make the fluid in the pipeline 3 enter the cavity from the liquid inlet pipe 13 and flow back into the pipeline 3 from the return pipe 14, in this embodiment, the liquid inlet pipe 13 and the return pipe 14 are sequentially arranged at intervals according to the flowing direction of the fluid in the pipeline 3, so that the fluid flows in the pipeline 3 and firstly passes through the first end of the liquid inlet pipe 13 and then passes through the first end of the return pipe 14, under the slight pressure difference of the fluid along the flowing direction, the fluid can enter the overlock body 1 through the first end of the liquid inlet pipe 13, and the fluid in the overlock body 1 can flow back into the pipeline 3 through the first end of the return pipe 14.
In addition, the specific distance between the liquid inlet pipe 13 and the return pipe 14 on the pipeline 3 can be set according to actual requirements, so that a suitable pressure difference is formed between the liquid inlet pipe 13 and the return pipe 14, and this embodiment is not particularly limited.
Fluid still need can flow to the pressure probe 2 contact with the pressure measurement instrument after in passing through feed liquor pipe 13 entering overlock body 1 to the oppression effect of fluid to pressure probe 2 detects fluid pressure. Therefore, in the present embodiment, the second end of the liquid inlet pipe 13 located in the cavity of the first connector 11 extends toward the open end of the first connector 11, so that the second end of the liquid inlet pipe 13 is close to the pressure probe 2 located at the open end, and a gap is formed between the second end of the liquid inlet pipe 13 and the pressure probe 2. So not only can guarantee from the fluid of feed liquor pipe 13 second end outflow can with pressure probe 2 contact and cause the oppression to it to detect the pressure of fluid through the oppression effect of fluid to pressure probe 2, and, the fluid in the feed liquor pipe 13 can flow out to the cavity of first interface 11 in from the space between its second end and pressure probe 2. Wherein, because the liquid inlet pipe 13 is positioned in the cavity, and a large space is arranged between the liquid inlet pipe and the inner wall of the cavity, fluid can fall into each area in the cavity.
The fluid flowing out of the second end of the liquid inlet pipe 13 and falling into the cavity flows back into the pipeline 3 from the return pipe 14, and the fluid falling into the cavity all falls on the upper end surface of the overlock body 1 at the bottom end of the cavity, so that the second end of the return pipe 14 of the embodiment is flush with the upper end surface of the overlock body 1, and thus, a large height difference exists between the second end of the return pipe 14 and the second end of the liquid inlet pipe 13, and the fluid can flow out of the second end of the liquid inlet pipe 13 and enter the second end of the return pipe 14 to enter the return pipe 14; and it is ensured that the fluid in the cavity can enter the second end of the return pipe 14, avoiding the second end of the return pipe 14 to be higher than the upper end face of the overlock body 1, whereby the fluid is prevented from accumulating between the upper end face of the overlock body 1 and the second end of the return pipe 14.
With such arrangement, for the case of low temperature such as the ambient temperature below zero, even if the temperature of the outer wall of the first connector 11 is low, the fluid flowing into the cavity of the first connector 11 is poor in fluidity, and the fluid with higher temperature in the pipeline 3 enters the cavity of the first connector 11 of the overlock body 1 through the liquid inlet pipe 13, the fluid in the liquid inlet pipe 13 keeps at higher temperature, so that the fluid has a relatively high degree of motion and higher energy, and the fluid with higher temperature and strong fluidity flows out from the second end of the liquid inlet pipe 13, so as to generate a relatively strong pushing effect on the fluid with lower temperature and poor fluidity in the cavity, and push the fluid in the cavity to move towards the upper end face of the overlock body 1, and enter the second end of the return pipe 14 to flow back into the pipeline 3.
It should be noted that, the lower the external temperature is, the greater the temperature difference between the fluid in the liquid inlet pipe 13 and the fluid in the cavity is, the more obvious the pushing action of the fluid with higher temperature flowing out of the liquid inlet pipe 13 on the fluid with lower temperature in the cavity is, the more obvious the pushing action on the fluid in the cavity is, the fluid in the cavity can always maintain a good flowing state and enter the return pipe 14, thereby preventing the fluid from being cooled and frozen or forming hydrates due to low temperature, reducing the probability that the fluid forms abnormal compression on the pressure probe 2 due to cold expansion, thereby reducing the risk of failure of the pressure probe 2, keeping the fluid pressure detected by the pressure probe 2 consistent with the fluid pressure in the pipeline 3, and improving the accuracy of the pressure detector.
In addition, because the fluid in the liquid inlet pipe 13 is always kept at a higher temperature, after entering the cavity, the fluid in the liquid inlet pipe 13 can exchange heat with the fluid in the cavity, so that the temperature of the fluid in the cavity is increased, the moving severity of the fluid with the increased temperature is improved, the flowing speed of the fluid in the cavity can be increased, and the fluid in the cavity can be caused to flow back into the pipeline 3 through the return pipe 14.
In order to maintain a high temperature difference between the fluid inside the inlet pipe 13 and the fluid inside the cavity, and to maintain a high temperature of the fluid inside the inlet pipe 13, which generates a strong pushing action on the fluid inside the cavity, in a possible embodiment, the inlet pipe 13 may be removably arranged on the overlock body 1, and the inlet pipe 13 may be a heat insulating pipe.
The overlock body 1 is usually made of metal, and in order to reduce the heat transfer between the liquid inlet pipe 13 and the overlock body 1, the liquid inlet pipe 13 can be made of a material different from that of the overlock body 1, so that the heat transfer efficiency between the two can be reduced. In particular, the liquid inlet pipe 13 may be an insulated pipe made of some material with better heat insulation.
Because feed liquor pipe 13 is different with the 1 material of overlock body, therefore can set up feed liquor pipe 13 detachable in overlock body 1, overlock body 1 is last to set up the through-hole that internal diameter and 13 external diameters of feed liquor pipe match, and in order to guarantee the fastness of being connected between feed liquor pipe 13 and the overlock body 1, as shown in fig. 5, can be provided with the less bulge 132 of a plurality of sizes on the outer wall of feed liquor pipe 13, this bulge 132 can increase the frictional force between feed liquor pipe 13 and the through-hole, make the more firm setting of feed liquor pipe 13 in the through-hole. Similarly, the connection stability of the liquid inlet pipe 13 and the through hole can be enhanced by providing the protrusion 132 on the inner wall of the through hole.
In addition, a sealing element can be arranged between the inner wall of the through hole and the outer wall of the liquid inlet pipe 13 to seal a gap between the liquid inlet pipe 13 and the through hole, so that fluid is prevented from entering from the gap and being accumulated in the gap, and the damage to the overlock body 1 is prevented.
As shown in fig. 4, for the connection between the overlock body 1 and the pressure detector and the pipeline 3 through the first interface 11 and the second interface 12, an open end of the first interface 11, that is, an end of the first interface 11 connected with the pressure probe 2 of the pressure detector, may be provided with an internal thread 17, an external thread is correspondingly provided on an outer wall of the pressure probe 2, and the first interface 11 is fixedly connected with the pressure probe 2 through a threaded connection; similarly, the end of the second connector 12 connected with the pipeline 3 can also be provided with an internal thread 17, the connecting part of the outer wall of the pipeline 3 is correspondingly provided with an external thread, and the overlock body 1 is fixed on the outer wall of the pipeline 3 through threaded connection.
According to design requirements, the first connector 11 and the second connector 12 of the overlock body 1 can also be provided with external threads, and the pressure probe 2 and the outer wall of the pipeline 3 are correspondingly provided with internal threads 17; alternatively, the first port 11 and the pressure probe 2, and the second port 12 and the outer wall of the pipeline 3 are fixedly connected by a snap, or other connection methods may be used, which is not limited in this embodiment.
As shown in fig. 1 to 3, in one possible embodiment, the first end of the liquid inlet pipe 13 and the first end of the return pipe 14 may be provided with a first stop valve 131 and a second stop valve 141, respectively, for controlling the on/off of the pipes. By providing a first stop valve 131 at the first end of the liquid inlet pipe 13, a second stop valve 141 at the first end of the return pipe 14, and opening or closing the first stop valve 131 and the second stop valve 141, the fluid in the pipeline 3 can be controlled to enter the overlock device or not, so that when the pressure of the fluid in the pipeline 3 needs to be detected, the first stop valve 131 and the second stop valve 141 are opened to enable the fluid to flow back between the overlock device and the pipeline 3; without detecting the pressure of the fluid in the pipeline 3, the first and second cutoff valves 131 and 141 are closed to allow the fluid to flow normally in the pipeline 3.
In addition, under the condition of high ambient temperature, the fluid medium in the pipeline 3 can not be frozen and frozen, and the fluid medium can keep good fluidity, so that the second stop valve 141 can be kept closed by only opening the first stop valve 131, the fluid medium enters the cavity of the overlock body 1 through the liquid inlet pipe 13 and then flows back to the liquid inlet pipe 13, and the flexibility of the operation of the device is good.
Specifically, as shown in fig. 1 to 3, the first and second cutoff valves 131 and 141 may each be a needle-shaped cutoff valve. The stop valve that uses in the instrument measurement pipe-line system can be the aciculiform stop valve usually, and the sealing performance of aciculiform stop valve is good, long service life, even sealed face damages the back, also only need change easy damage part, can continue to use. Therefore, the first and second cutoff valves 131 and 141 of the present embodiment may employ needle-shaped cutoff valves. The needle stop valve can be a manual stop valve or a ball valve, so that the needle stop valve can be arranged on the pipeline close to the pipeline 3, and the operation of a detector is facilitated.
In a possible embodiment, the liquid inlet pipe 13 may be a straight pipe, and the extending direction of the liquid inlet pipe 13 from the first end to the second end is the same as the axial direction of the overlock body 1 and the first connector 11. As shown in fig. 1, in order to make the fluid in the pipeline 3 smoothly enter the liquid inlet pipe 13, and make the fluid in the liquid inlet pipe 13 flow into the cavity from the second end thereof against gravity, in this embodiment, the liquid inlet pipe 13 is configured as a linear pipe, the fluid can flow forward along the pipe wall in the linear pipe, the obstruction effect is small, the kinetic energy of the fluid flowing loss in the linear pipe is small, and thus the fluid can be ensured to flow to the second end of the liquid inlet pipe 13 and flow into the cavity from the second end.
On the basis, the extending direction of the liquid inlet pipe 13 from the first end to the second end, that is, the axial direction of the liquid inlet pipe 13 is the same as the axial direction of the overlock body 1 and the first connector 11, so that the fluid vertically moves towards the second end in the liquid inlet pipe 13, compared with the inclined arrangement between the liquid inlet pipe 13 and the axial direction of the first connector 11, the fluid in the structural form overcomes the self gravity mainly by virtue of the flow force, the lateral pressure generated on the pipe wall is smaller, the generated smaller lateral pressure can be uniformly transmitted to each part of the pipe wall in the radial direction, the larger pressure generated on one side of the pipe wall due to the inclination can not be generated, the fluid flow can not be blocked by the reaction force of the pipe wall, the pressure borne by the pipe wall is smaller, the risk of damage or breakage of the liquid inlet pipe 13 can also be remarkably reduced, and the service life of the liquid inlet pipe 13 can be prolonged.
In addition, because the axial direction of the liquid inlet pipe 13 is the same as the axial direction of the first connector 11, the fluid flowing out from the second end of the liquid inlet pipe 13 can uniformly fall into each part of the cavity, the phenomenon that the liquid flowing out from the second end of the liquid inlet pipe 13 mainly falls into the cavity part in the inclined direction due to the inclination of the liquid inlet pipe 13 is avoided, the pressure of each part of the cavity is prevented from being different, the uniformity of the fluid pressure in the cavity can be kept, and the uniformity of the pressure bearing of the side wall of the cavity and the upper end surface of the overlock body 1 is improved.
Specifically, as shown in fig. 1 to 3, the liquid inlet pipe 13 may coincide with a central axis of the cavity of the first connector 11. Like this feed liquor pipe 13 is located the center of cavity, the interval homogeneous phase of feed liquor pipe 13 and each position of first interface 11 inner wall equals, as shown before, the vertical upflow of fluid in feed liquor pipe 13 reaches the second end of feed liquor pipe 13, the fluid can be followed the even back fall to each position of cavity of feed liquor pipe 13 second end, the fluid that falls into in the cavity is the same to the pressure that each position of cavity lateral wall produced on the radial direction, and the fluid is also homogeneous phase to the pressure of each position of overlock body 1 upper end face, overlock body 1 whole atress is comparatively even like this, be favorable to maintaining its structure symmetry and improve life.
As shown in fig. 1 and 3, for the specific structure of the return pipe 14 on the overlock body 1, the return pipe 14 may be a straight pipe extending in a direction different from the axial direction of the overlock body 1, or the return pipe 14 may have a bent section. Since the return pipe 14 is directly connected to the cavity with a larger volume, and the liquid inlet pipe 13 has a limited size and the fluid in the liquid inlet pipe 13 needs to flow out from the second end thereof against gravity, the flow rate of the fluid in the liquid inlet pipe 13 is slow, and the fluid in the cavity can flow into the return pipe 14 directly under the action of gravity, i.e. the flow rate of the fluid in the cavity flowing into the return pipe 14 is fast.
In order to reduce the speed difference of the fluid flowing in the liquid inlet pipe 13 and the return pipe 14, so that the circulating reflux of the fluid between the overlock body 1 and the pipeline 3 can be kept in a continuous and uniform state, the axis of the return pipe 14 and the axis of the overlock body 1 can be obliquely arranged, or the return pipe 14 is provided with a bent section, so that the fluid can be hindered by the pipe wall of the return pipe 14 when moving in the return pipe 14, the flowing speed of the fluid can be reduced, the flowing speed of the fluid in the liquid inlet pipe 13 and the flowing speed of the fluid in the return pipe 14 are balanced, and the fluid can be kept in a uniform and continuous state in the circulating reflux process between the overlock body 1 and the pipeline 3. Therefore, the flowing speed of the fluid in the fluid inlet pipe 13 and the fluid in the fluid return pipe 14 is kept in a low state, and the accuracy of pressure detection can be further improved.
In another possible embodiment, the diameter of the inlet pipe 13 may be greater than the diameter of the return pipe 14. In order to balance the flow speed of the fluid in the liquid inlet pipe 13 and the flow speed of the fluid in the return pipe 14 and keep the flow rate in the liquid inlet pipe 13 and the flow rate in the return pipe 14 consistent, the diameter of the liquid inlet pipe 13 can be increased or the diameter of the return pipe 14 can be decreased, so that the flow rate of the liquid inlet pipe 13 is slightly larger, more fluid enters the liquid inlet pipe 13 at the same time, and even if the flow rate of the fluid in the liquid inlet pipe 13 is lower, the flow rate of the fluid in the liquid inlet pipe 13 is larger, the flow rates of the fluid in the liquid inlet pipe 13 and the fluid in the return pipe 14 can be balanced, and the fluid circulating and returning process can be kept in a more uniform and continuous state.
As shown in fig. 1 to 3, in a possible embodiment, the overlock body 1 may be further provided with a liquid discharge pipe 15, a first end of the liquid discharge pipe 15 is communicated with the return pipe 14, and a second end is positioned on the outer wall of the overlock body 1; a drain pipe 15 is provided near the second end of the return pipe 14, and the drain pipe 15 is used for discharging the fluid in the cavity to the outside of the overlock body 1 through the drain pipe 15 after the first stop valve 131 and the second stop valve 141 are both closed.
In this embodiment, the overlock body 1 is further provided with a liquid discharge pipe 15, and the liquid discharge pipe 15 is used for discharging pressure in the overlock body 1 when the overlock device does not work, and can clean impurities in the overlock body 1 through the liquid discharge pipe 15 to clean and maintain the overlock body 1. Specifically, a first end of the liquid discharge pipe 15 is connected to the return pipe 14, the other end of the liquid discharge pipe 15 is located on the outer wall of the overlock body 1, and the liquid discharge pipe 15 is close to a second end of the return pipe 14. Thus, after the first stop valve 131 and the second stop valve 141 are closed, a part of the fluid remained in the overlock body 1 cannot flow back into the pipeline 3, and the remained fluid can flow out of the overlock body 1 through the liquid discharge pipe 15, so that the pressure of the part of the fluid on the overlock body 1 can be discharged.
Through remaining fluid in the 15 discharge of fluid-discharge tube of copy book body 1, except can leaking the pressure of copy book body 1, this partial fluid flows out to copy book body 1 outside through fluid-discharge tube 15, and this partial fluid can also play the effect of washing the cavity of first interface 11, can pass through fluid-discharge tube 15 with the impurity in the cavity and discharge, can clean the maintenance to copy book body 1, can prolong the life of copy book body 1.
When the overlock device is in operation, the first stop valve 131 and the second stop valve 141 are both opened, or only the first stop valve 131 is opened, so as to avoid that fluid flows out of the drain pipe 15 to the exterior of the overlock body 1, and thus part of the fluid cannot normally flow back into the pipeline 3, in a possible embodiment, the second end of the drain pipe 15 may be detachably provided with a blocking piece 16.
As shown in fig. 1 to 3, the second end of the discharge pipe 15 is provided with a blocking member 16, and in the normal operation of the overlock device, when the first stop valve 131 and the second stop valve 141 are both opened, the second end of the discharge pipe 15 is blocked by the blocking member 16 at this time, and fluid cannot flow out from the second end of the discharge pipe 15, so that the fluid can be ensured to normally flow back into the pipeline 3; when the first and second shut-off valves 131 and 141 are closed and the cocking device is not in operation, the blocking member 16 is removed from the second end of the discharge pipe 15, so that the fluid remaining in the cavity can be discharged through the discharge pipe 15.
The overlock device for pressure detection provided by the embodiment is connected between a pressure detector and a pipeline and comprises an overlock body, wherein the upper end surface and the lower end surface of the overlock body are respectively provided with a first interface and a second interface, the first interface is connected with the pressure detector, the second interface is connected on the pipeline, the first interface is provided with a cavity, one end of the first interface, facing the pressure detector, is an open end, and a pressure probe of the pressure detector is arranged at the open end; the overlock body is provided with a liquid inlet pipe and a return pipe at intervals, the first end of the liquid inlet pipe is communicated with a pipeline, the second end of the liquid inlet pipe extends to a pressure probe, a gap is reserved between the second end of the return pipe and the pressure probe, the second end of the return pipe is parallel to the upper end face of the cock body, the liquid inlet pipe and the return pipe are sequentially arranged at intervals according to the flowing direction of fluid in the pipeline, the fluid can firstly enter the liquid inlet pipe from the first end of the liquid inlet pipe under the action of pressure difference, the fluid flowing out of the second end of the liquid inlet pipe can be contacted with the pressure probe and press the pressure probe, the pressure probe can accurately detect the pressure of the fluid, then the fluid flowing out of the second end of the liquid inlet pipe falls into a cavity of the first connector from two sides of the liquid inlet pipe and is contacted with the upper end face of the overlock body, finally enters the return pipe through the second end of the return pipe on the upper end face of the overlock body, and flows back into the pipeline from the first end of the return pipe. Therefore, the temperature of the fluid in the liquid inlet pipe is high, even if the temperature of the external environment is low, the temperature of the fluid in the first interface cavity is reduced, because the temperature difference exists between the fluid in the liquid inlet pipe and the fluid in the cavity, the fluid with the high temperature in the liquid inlet pipe enters the cavity and can generate a pushing effect on the fluid in the cavity, the fluid in the cavity can smoothly flow back into a pipeline through the return pipe, the fluid can be prevented from being cooled and frozen or forming hydrate due to low temperature, the risk of failure of the pressure probe is reduced, and the detection accuracy of the pressure probe is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The overlock device for pressure detection is characterized by comprising an overlock body, wherein the overlock body is provided with an upper end surface and a lower end surface which are opposite, the upper end surface and the lower end surface are respectively provided with a first interface and a second interface, the first interface is provided with an open cavity, a pressure probe of a pressure detection instrument is arranged at the open end of the cavity, and the second interface is connected to a pipeline;
a liquid inlet pipe and a return pipe are sequentially arranged on the overlock body at intervals along the flowing direction of fluid in the pipeline, the first end of the liquid inlet pipe and the first end of the return pipe both extend to the pipeline from the second interface and are communicated with the pipeline, the second end of the liquid inlet pipe and the second end of the return pipe are both communicated with the cavity of the first interface, the second end of the liquid inlet pipe extends towards the pressure probe and is provided with a gap with the pressure probe, the second end of the return pipe is flush with the upper end face, the liquid inlet pipe is detachably arranged on the overlock body, the liquid inlet pipe is a heat insulation pipe, and the overlock body and the liquid inlet pipe are made of different materials;
an internal thread is arranged at one end of the first interface, which is connected with a pressure probe of the pressure detection instrument, an external thread is correspondingly arranged on the outer wall of the pressure probe, and the first interface is fixedly connected with the pressure probe through threaded connection; the second interface with pipeline connection's one end is provided with the internal thread, the corresponding external screw thread that sets up on the connecting portion position of pipeline outer wall, the overlock body passes through threaded connection to be fixed on the pipeline outer wall.
2. The overlock device for pressure detection according to claim 1, wherein a first end of said liquid inlet pipe and a first end of said return pipe are respectively provided with a first stop valve and a second stop valve for controlling the opening and closing of the pipeline.
3. The overlock device for pressure detection according to claim 2, wherein said liquid inlet pipe is a straight pipe, and an extending direction of said liquid inlet pipe from a first end to a second end is the same as an axial direction of said overlock body and said first port.
4. The overlock device for pressure detection according to claim 2, wherein said return pipe is a straight pipe having an extending direction different from an axial direction of said overlock body, or said return pipe has a bent section.
5. The overlock device for pressure detection according to claim 3, wherein the liquid inlet pipe coincides with a central axis of the cavity of the first port.
6. The pressure detecting overlock device according to any one of claims 1 to 5, wherein a diameter of said liquid inlet pipe is larger than a diameter of said return pipe.
7. The overlock device for pressure detection according to any one of claims 2 to 5, wherein a drain pipe is further provided on said overlock body, a first end of said drain pipe is communicated with said return pipe, and a second end of said drain pipe is located on an outer wall of said overlock body; the drain pipe is close to the second end of the return pipe, and the drain pipe is used for discharging the fluid in the cavity to the outside of the overlock body through the drain pipe after the first stop valve and the second stop valve are both closed.
8. The overlock device for pressure detection according to claim 7, wherein a stopper is detachably provided to a second end of said liquid discharge pipe.
9. The pressure detecting overlock device according to any one of claims 2 to 5, wherein said first shut-off valve and said second shut-off valve are needle shut-off valves.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103946644A (en) * | 2011-11-16 | 2014-07-23 | 巴布科克和威尔科克斯能量产生集团公司 | Freeze protection system for solar receiver |
| CN205538088U (en) * | 2016-01-24 | 2016-08-31 | 胡延军 | Fluid pressure testing arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016751A (en) * | 2012-12-14 | 2013-04-03 | 宁秀文 | Valve and pressure measuring device |
| CN203011617U (en) * | 2013-01-22 | 2013-06-19 | 铁岭兴科精密仪器有限责任公司 | Special defroster for pressure meter |
| CN206832403U (en) * | 2017-05-03 | 2018-01-02 | 中国石油天然气股份有限公司 | A kind of pressure ga(u)ge damper |
| CN208595352U (en) * | 2018-07-05 | 2019-03-12 | 中国石油天然气股份有限公司 | Pressure release plug |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946644A (en) * | 2011-11-16 | 2014-07-23 | 巴布科克和威尔科克斯能量产生集团公司 | Freeze protection system for solar receiver |
| CN205538088U (en) * | 2016-01-24 | 2016-08-31 | 胡延军 | Fluid pressure testing arrangement |
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