External connection atmosphere pipe for bared differential pressure type sensor of atmospheric storage tank

Abstract

The utility model relates to the technical field of chemical production, in particular to an external atmosphere pipe for an exposed differential pressure type sensor of an atmospheric storage tank, which comprises an L-shaped bent pipe, an NPT external thread connector is arranged at the transverse end of the L-shaped bent pipe, a plastic sleeve is arranged at the longitudinal bottom of the L-shaped bent pipe, a hot straining ring is sleeved at the joint of the upper end of the plastic sleeve and the L-shaped bent pipe, and the plastic sleeve is longer than the L-shaped bent pipe. The lower end of the plastic sleeve is provided with a downward inclined notch. When the device is installed at the atmospheric external interface of the transmitter, the phenomenon of L-end water blockage caused by cloudy and rainy weather is fundamentally avoided, the hidden danger of safe operation is reduced, the safe operation control is improved, the safe operation coefficient is greatly improved, and the accident occurrence probability is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a technical field of chemical production, concretely relates to a kind of for atmospheric storage tank exposed differential pressure sensor external atmosphere pipe. BACKGROUND

[0002] In the design and installation of chemical enterprise, differential pressure pressure transmitter is usually installed in atmospheric storage tank (design-0.5KPa (G)-1.5Kpa (G)), as real-time detection equipment of tank pressure. Differential pressure pressure transmitter is installed at the top of storage tank, and the position is close to passageway fence, and space is narrow, and it is open-air installation, H end connects storage tank pressure monitoring point, L point is communicated with atmosphere, and the detection gauge pressure is the difference between the pressure of H end connecting storage tank pressure monitoring point and the pressure of L point communicated with atmosphere.

[0003] At present, domestic differential pressure pressure transmitter is installed at the top of storage tank, and it is open-air installation, is greatly influenced by weather (rain, humidity), and in actual safety production process, hidden danger caused by rainwater, humid water droplet blocking differential pressure transmitter L point occurs frequently, and a lot of manpower is consumed to climb storage tank to eliminate problems and eliminate safety hidden danger.

[0004] At present, there is no need for domestic atmospheric storage tank exposed differential pressure sensor external atmosphere pipe to avoid data deviation, to ensure operation safety and eliminate field hidden danger, therefore, it is very necessary to design a kind of atmospheric storage tank exposed differential pressure sensor external atmosphere pipe. INVENTION CONTENTS

[0005] The utility model discloses a kind of atmospheric storage tank exposed differential pressure sensor external atmosphere pipe to solve the above problems, which is provided.

[0006] The utility model is realized by the following technical solutions: a kind of for atmospheric storage tank exposed differential pressure sensor external atmosphere pipe, characterized by including L type elbow pipe, the transverse end of L type elbow pipe is equipped with NPT external thread interface, longitudinal bottom is equipped with plastic sleeve, plastic sleeve upper end and L type elbow pipe connection place are covered with hot ring, plastic sleeve is longer than L type elbow pipe, plastic sleeve lower end is made into downward bevel.

[0007] Further, the length of the NPT external thread interface accounts for 1 / 4 of the transverse section of the L-shaped elbow pipe, and the NPT external thread interface is connected with the atmosphere connection interface of the differential pressure sensor.

[0008] Further, the beveling angle of the downward bevel is 45-60 degrees.

[0009] Further, the L-shaped elbow pipe is made of 304 or 316 material.

[0010] Further, the plastic sleeve and the hot ring are both made of PP material.

[0011] The beneficial effect of the utility model is: installing the device at the atmospheric external interface of the transmitter fundamentally eliminates the L end water block phenomenon caused by rainy weather, reduces the hidden danger of safe operation, improves the safe operation control, greatly improves the safe operation coefficient, and reduces the probability of accidents. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a structure schematic view of the utility model;

[0013] Fig. 2 It is a structure schematic view of the utility model at the installation position of the differential pressure sensor;

[0014] In the drawings, 1 is an L-shaped elbow pipe, 2 is an NPT external thread interface, 3 is a thermal tight ring, and 4 is a plastic sleeve. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and beneficial effect of the utility model more clear and obvious, the technical scheme in the utility model is further explained below in combination with examples.

[0016] As shown in the drawings, Figs. 1-2 An atmospheric external pipe for exposed differential pressure sensor of atmospheric storage tank, comprising an L-shaped elbow pipe 1, the L-shaped elbow pipe 1 is made of 304 or 316 material. The transverse end of the L-shaped elbow pipe 1 is provided with an NPT external thread interface 2, the length of the NPT external thread interface 2 accounts for 1 / 4 of the transverse section of the L-shaped elbow pipe 1, a 1 / 4 NPT external thread interface 2 is adopted, which is more convenient for the dismounting and mounting of the operating personnel, the NPT external thread interface 2 is connected with the atmospheric external interface of the differential pressure sensor; the longitudinal bottom is provided with a plastic sleeve, a thermal tight ring 3 is sleeved at the connection between the upper end of the plastic sleeve and the L-shaped elbow pipe 1, in order to be transparent and easy to observe, the plastic sleeve 4 and the thermal tight ring 3 are both made of PP material, the thermal tight ring 3 tightly connects the plastic sleeve 4 and the L-shaped elbow pipe 1 together, and the sealing performance of the whole is improved.

[0017] The plastic sleeve 4 is longer than the L-shaped elbow pipe 1, and the plastic sleeve completely covers the metal port at the bevel, so as to ensure installation and production.

[0018] The lower end of the plastic sleeve 4 is obliquely cut downward, and the oblique angle of the downward oblique cut is 45-60 degrees; the 45-60 degree interface is beneficial to the outflow of condensed water and is not easy to form water blockage.

[0019] The pipe is used for the differential pressure sensor at the top of the atmospheric storage tank, the 45-60° opening faces inward, the plastic sleeve covers the L-shaped elbow pipe 1 to avoid wind and water droplets from blocking the pipe opening, meets the use requirement, in addition, personnel can also be prevented from scratching, and the safety performance is improved.

[0020] The utility model is installed at the atmospheric L end of the differential pressure transmitter of the storage tank, is connected through threads, and the elbow pipe is installed downward

[0021] After installation, test whether rainwater or water droplets form water blockages at the 45-60° angled opening, affecting the pressure gauge data calculation.

[0022] After multiple tests, the modified pipe structure can effectively avoid the impact of water blockage on the pressure sensor, ensuring unobstructed connection between the L end and the atmosphere, thereby eliminating the impact of water blockage on the data at the L end pipe.

[0023] Except for the technical features described in the specification, all other technical features are known to those skilled in the art.

Claims

1. An external atmospheric pipe for an exposed differential pressure sensor in an atmospheric pressure storage tank, characterized in that, It includes an L-shaped bend (1), with an NPT external thread interface (2) at the transverse end of the L-shaped bend (1) and a plastic sleeve at the longitudinal bottom. A heat-tightening ring (3) is fitted at the connection between the upper end of the plastic sleeve and the L-shaped bend (1). The plastic sleeve (4) is longer than the L-shaped bend (1), and the lower end of the plastic sleeve (4) is cut downwards at an angle.

2. The external atmospheric pipe for an exposed differential pressure sensor in an atmospheric pressure storage tank according to claim 1, characterized in that, The length of the NPT external thread interface (2) is 1 / 4 of the transverse section of the L-shaped bend (1), and the NPT external thread interface (2) is connected to the differential pressure sensor's external interface.

3. The external atmospheric pipe for an exposed differential pressure sensor in an atmospheric pressure storage tank according to claim 1, characterized in that, The angle of the downward bevel is 45-60 degrees.

4. The external atmospheric pipe for an exposed differential pressure sensor in an atmospheric pressure storage tank according to claim 1, characterized in that, The L-shaped bend (1) is made of 304 or 316 stainless steel.

5. The external atmospheric pipe for an exposed differential pressure sensor in an atmospheric pressure storage tank according to claim 1, characterized in that, Both the plastic sleeve (4) and the heat-tightening ring (3) are made of PP material.

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