阅读说明：本技术 高温高压下两相流精细化测量装置的密封件结构及装置 (Sealing element structure and device of two-phase flow fine measurement device under high temperature and high pressure ) 是由 余诗墨 闫晓 龚随军 张君毅 胡强 昝元锋 于 2020-07-15 设计创作，主要内容包括：本发明公开了高温高压下两相流精细化测量装置的密封件结构及装置,密封件结构包括密封件本体,密封件本体为圆柱体,密封本体轴向设有通孔,通孔内用于设置两相流精细化测量装置的电极丝；密封件本体设置于两相流精细化测量装置基板上的贯穿结构内；密封件本体材质为热膨胀系数大的金属,在冷态情况下,将电极丝穿过通孔,把该密封件结构装配到两相流精细化测量装置基板上的贯穿结构内,使通孔与电极丝之间存在第一热胀间隙,该密封件结构外周与基板上的贯穿结构内周之间存在第二热胀间隙；当开展高温高压工况实验时,密封件本体随温度升高并产生热膨胀,将压紧电极丝和基板上的贯穿结构,实现密封。(The invention discloses a sealing element structure and a device of a two-phase flow fine measurement device under high temperature and high pressure, wherein the sealing element structure comprises a sealing element body, the sealing element body is a cylinder, a through hole is axially formed in the sealing element body, and an electrode wire of the two-phase flow fine measurement device is arranged in the through hole; the sealing element body is arranged in a penetrating structure on the two-phase flow fine measurement device substrate; the material of the sealing element body is metal with a large thermal expansion coefficient, under the cold state, the electrode wire penetrates through the through hole, the sealing element structure is assembled in a penetrating structure on a substrate of the two-phase flow fine measurement device, a first thermal expansion gap is formed between the through hole and the electrode wire, and a second thermal expansion gap is formed between the outer periphery of the sealing element structure and the inner periphery of the penetrating structure on the substrate; when a high-temperature and high-pressure working condition experiment is carried out, the sealing element body rises along with the temperature and generates thermal expansion, and the electrode wire and the penetrating structure on the substrate are compressed to realize sealing.)

1. The sealing element structure of the two-phase flow fine measurement device under the high-temperature and high-pressure condition is characterized by comprising a sealing element body (1), wherein the sealing element body (1) is a cylinder, a through hole (2) is axially formed in the sealing element body (1), and an electrode wire (5) of the two-phase flow fine measurement device is arranged in the through hole (2); the sealing element body (1) is arranged in a penetrating structure (6) on a two-phase flow fine measurement device substrate;

the sealing element body (1) is made of metal with a large thermal expansion coefficient, under the cold state, the electrode wire (5) penetrates through the through hole (2), the sealing element structure is assembled into a penetrating structure (6) on the two-phase flow fine measurement device substrate, a first thermal expansion gap (3) is formed between the through hole (2) and the electrode wire (5), and a second thermal expansion gap (4) is formed between the outer periphery of the sealing element structure and the inner periphery of the penetrating structure (6) on the two-phase flow fine measurement device substrate;

when carrying out high temperature high pressure operating mode experiment, sealing member body (1) rises and produces the thermal expansion along with the temperature, fills first thermal expansion clearance (3) and second thermal expansion clearance (4) to sealing member body (1) will compress tightly structure (6) that run through on wire electrode (5) and the base plate, realizes sealedly.

2. The seal structure of the two-phase flow fine measurement device under the high-temperature and high-pressure condition according to claim 1, wherein under the high-temperature and high-pressure condition, the radial dimension of the seal body (1) tends to increase in proportion to the increase of the temperature.

3. The seal structure of the two-phase flow fine measurement device under the high-temperature and high-pressure conditions as claimed in claim 2, wherein the axial length of the seal body (1) ranges from 10mm to 30 mm.

4. The seal structure of the two-phase flow fine measurement device under the high temperature and high pressure condition according to claim 2, wherein the maximum pressure in the high temperature and high pressure condition is 15.5MPa, and the maximum temperature is 345 ℃.

5. The seal structure of the two-phase flow fine measurement device under the high temperature and high pressure condition according to claim 1, wherein the first thermal expansion gap (3) is 0.02 mm.

6. The seal structure of the two-phase flow fine measurement device under the high temperature and high pressure condition according to claim 5, wherein the second thermal expansion gap (4) is 0.02 mm.

7. The sealing element structure of the two-phase flow fine measurement device under the high-temperature and high-pressure conditions according to claim 1, wherein the material of the sealing element body (1) is manganese, aluminum, lead or cadmium.

8. A two-phase flow fine measurement device under the high-temperature and high-pressure condition comprises a substrate (7), and is characterized in that the substrate (7) is a hollow square body, and a plurality of penetrating structures (6) are uniformly arranged on the same horizontal plane on the peripheral side surface of the substrate (7); the wire electrode is characterized by further comprising a wire electrode (5), wherein the wire electrode (5) penetrates through a penetrating structure (6) which is symmetrical left and right on the substrate (7), and the wire electrode (5) penetrates through the penetrating structure (6) which is symmetrical front and back on the substrate (7); the distance between the adjacent electrode wires (5) is 1mm-2 mm;

the two-phase flow fine measurement device under the high-temperature and high-pressure conditions further comprises a sealing structure of the two-phase flow fine measurement device under the high-temperature and high-pressure conditions, wherein the sealing structure is assembled in each penetrating structure (6), and the electrode wire (5) penetrates through the through hole (2) of the sealing structure.

9. A two-phase flow refinement measurement device under high temperature and high pressure conditions according to claim 8, characterised in that said through structure (6) has a diameter of 0.5 mm.

Technical Field

The invention relates to the technical field of sealing structures of two-phase flow fine measurement devices, in particular to a sealing element structure and a sealing element device of a two-phase flow fine measurement device under high temperature and high pressure, so that the fine measurement device can effectively measure two-phase flow under the conditions of high temperature and high pressure and can meet the sealing requirements under the conditions of high temperature and high pressure.

Background

The limitation of a two-phase interface parameter measuring means is one of key factors for restricting the deep research of two-phase flow, the traditional probe measuring means can only realize single-point measurement and cannot obtain the instantaneous interface parameters of the whole field of the cross section of a flow channel, a refined measuring device shown in figure 1 can realize the whole-field instantaneous measurement of the interface parameters of the cross section of the flow channel, the device has a penetrating structure that an electrode wire penetrates through a substrate and needs to be sealed, and the sealing can be realized by adopting common sealing glue such as glass cement and the like under the working conditions of normal temperature and normal pressure; however, for the experiment of simulating the real reactor operation condition, the pressure is up to 15.5MPa, the temperature is up to 345 ℃, the sealing difficulty is very high, and the sealing can not be realized by adopting the glue method.

In addition, for engineering purposes, in the case of a through structure and a small diameter of a through part, a sealing structure as shown in fig. 2 is generally adopted, and sealing is carried out by matching a flexible red copper pad and a gland nut, for example, a thermocouple is generally adopted. However, the distance between two electrode wires in the refined interface parameter measuring device is very small (1mm-2mm), and the sealing structure shown in fig. 2 cannot be arranged.

Therefore, aiming at a two-phase flow fine measuring device in a reactor, the existing sealing structure cannot realize sealing under the conditions of high temperature and high pressure.

Disclosure of Invention

The invention aims to provide a sealing element structure and a sealing element device of a two-phase flow fine measurement device under high temperature and high pressure, which solve the problem that the traditional high temperature and high pressure sealing structure cannot realize such fine measurement, and can ensure the sealing performance of the fine measurement device under the conditions of high temperature and high pressure, so that the measurement device can carry out effective measurement under the working conditions of high temperature and high pressure.

The invention is realized by the following technical scheme:

a sealing element structure of a two-phase flow fine measurement device under the conditions of high temperature and high pressure comprises a sealing element body, wherein the sealing element body is a cylinder, a through hole is axially formed in the sealing element body, and an electrode wire of the two-phase flow fine measurement device is arranged in the through hole; the sealing element body is arranged in a penetrating structure on a substrate of the two-phase flow fine measurement device;

the sealing element body is made of metal with a large thermal expansion coefficient, the electrode wire penetrates through the through hole under a cold state, and the sealing element structure is assembled in a penetrating structure on a two-phase flow fine measurement device substrate, so that a first thermal expansion gap is formed between the through hole and the electrode wire, and a second thermal expansion gap is formed between the outer periphery of the sealing element structure and the inner periphery of the penetrating structure on the two-phase flow fine measurement device substrate;

when a high-temperature and high-pressure working condition experiment is carried out, the sealing element body rises along with the temperature and generates thermal expansion to fill the first thermal expansion gap and the second thermal expansion gap, so that the sealing element body compresses the electrode wire and the penetrating structure on the substrate to realize sealing.

The working principle is as follows:

based on a penetrating structure that an electrode wire penetrates through a substrate in a two-phase flow fine measurement device, the two-phase flow fine measurement device needs to be sealed, and for the working condition of normal temperature and normal pressure, sealing can be realized by adopting common sealing glue such as glass cement; however, for the experiment of simulating the real reactor operation condition, the pressure is up to 15.5MPa, the temperature is up to 345 ℃, the sealing difficulty is very high, and the sealing can not be realized by adopting the glue method. In addition, in engineering, for the case that a penetrating structure exists and the diameter of a penetrating part is small, a flexible red copper pad is generally used for sealing in cooperation with a compression nut, threads matched with the compression nut are arranged on a cylinder body, and the sealing mode is generally adopted for a thermocouple. However, the distance between two electrode wires in the refined interface parameter measuring device is very small (1mm-2mm), and the sealing structure cannot be arranged because the radius of the convex boss (the thread and the compression nut) exceeds the distance between the two electrode wires. Therefore, aiming at a two-phase flow fine measuring device in a reactor, the existing sealing structure cannot realize sealing under the conditions of high temperature and high pressure.

The invention designs a sealing element structure of a two-phase flow fine measurement device under the conditions of high temperature and high pressure, and the sealing element structure comprises a sealing element body, wherein the sealing element body is a cylinder with a through hole in the center, an electrode wire of the two-phase flow fine measurement device is arranged in the through hole, the sealing element body is arranged in a penetrating structure on a substrate of the two-phase flow fine measurement device, and meanwhile, the sealing element body is made of metal with thermal expansion capacity and has a larger thermal expansion coefficient; under the cold state, the electrode wire penetrates through the through hole, the sealing element structure is assembled in a penetrating structure on a two-phase flow fine measurement device substrate, a first thermal expansion gap is formed between the through hole and the electrode wire, and a second thermal expansion gap is formed between the outer periphery of the sealing element structure and the inner periphery of the penetrating structure on the two-phase flow fine measurement device substrate; when in use: under the cold state, the sealing element structure, the electrode wire and the penetrating structure of the substrate have micro gaps; get into the hot state condition when carrying out the experiment of high temperature high pressure operating mode, because the sealing member body rises and self produces the thermal expansion along with the temperature, fill first thermal expansion clearance and second thermal expansion clearance to the sealing member body will compress tightly the structure that runs through on wire electrode and the base plate, thereby realizes sealedly. The invention not only avoids the problem that the sealing by using glue is not suitable for simulating the high-temperature and high-pressure operation condition in a real reactor, but also overcomes the defect that a flexible red copper pad and a compression nut cannot be arranged for sealing due to the very small distance (1mm-2mm) between two electrode wires.

The sealing element has the advantages of simple structure, compact structure and volume, no complex assembly structure, capability of being assembled in a very small space on a refined interface parameter measuring device, and reliable working performance. The invention can solve the sealing problem of the refined interface parameter measuring device under the high-temperature and high-pressure working condition, and can realize the effective sealing of the refined interface parameter measuring device under the high-temperature and high-pressure working condition.

Preferably, under the high-temperature and high-pressure working condition, the radial size of the sealing element body increases in proportion to the increase of the temperature.

Preferably, the axial length range of the sealing element body is 10 mm-30 mm, so that under the working conditions of high temperature and high pressure, the sealing element body, the electrode wire and the penetrating structure on the substrate are ensured to have enough contact surfaces, and effective sealing is easier to form.

Preferably, the maximum pressure in the high-temperature and high-pressure working condition is 15.5MPa, and the maximum temperature is 345 ℃.

Preferably, the first thermal expansion gap is 0.02mm and the second thermal expansion gap is 0.02mm, based on the thin and small diameter of the wire electrode; guarantee like this and get into the hot condition when carrying out high temperature high pressure operating mode experiment, rise and self produce thermal expansion and just in time fill first thermal expansion clearance and second thermal expansion clearance at the sealing member body along with the temperature to the sealing member body will compress tightly the structure that runs through on wire electrode and the base plate, realizes sealedly.

Preferably, the sealing element body is made of manganese, aluminum, lead or cadmium, and the sealing element can realize the sealing of the penetrating structure of the substrate and the electrode wire by utilizing the principle of expansion with heat and contraction with cold of the metal material.

On the other hand, the invention also provides a two-phase flow fine measurement device under the high-temperature and high-pressure conditions, which comprises a substrate and is characterized in that the substrate is a hollow square body, and a plurality of penetrating structures are uniformly arranged on the same horizontal plane on the peripheral side surfaces of the substrate; the electrode wire penetrates through the penetrating structures which are symmetrical left and right on the substrate, and the electrode wire penetrates through the penetrating structures which are symmetrical front and back on the substrate; the distance between the adjacent electrode wires is 1mm-2 mm;

the two-phase flow fine measurement device under the high-temperature and high-pressure condition further comprises a sealing element structure, the sealing element structure is assembled in each penetrating structure, and the electrode wire penetrates through the through hole of the sealing element structure.

Preferably, the diameter of the through structure is 0.5mm, which can effectively match the seal body diameter of the seal structure designed by the invention.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the sealing element structure comprises a sealing element body, wherein the sealing element body is a cylinder with a through hole in the center, an electrode wire of a two-phase flow fine measurement device is arranged in the through hole, the sealing element body is arranged in a penetrating structure on a substrate of the two-phase flow fine measurement device, and meanwhile, the sealing element body is made of metal with thermal expansion capacity and has a large thermal expansion coefficient; under the cold state, the electrode wire penetrates through the through hole, the sealing element structure is assembled in a penetrating structure on a two-phase flow fine measurement device substrate, a first thermal expansion gap is formed between the through hole and the electrode wire, and a second thermal expansion gap is formed between the outer periphery of the sealing element structure and the inner periphery of the penetrating structure on the two-phase flow fine measurement device substrate; when in use: under the cold state, the sealing element structure, the electrode wire and the penetrating structure of the substrate have micro gaps; when a high-temperature and high-pressure working condition experiment is carried out, the hot state condition is entered, and the sealing element body is heated along with the temperature and generates thermal expansion to fill the first thermal expansion gap and the second thermal expansion gap, so that the electrode wire and the penetrating structure on the substrate are pressed by the sealing element body, and sealing is realized;

2. the sealing element has simple and compact structure and simple assembly, can be assembled in a very small space on a refined interface parameter measuring device, and has reliable working performance; the invention can solve the sealing problem of the refined interface parameter measuring device under the high-temperature and high-pressure working condition, and can realize the effective sealing of the refined interface parameter measuring device under the high-temperature and high-pressure working condition.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural diagram of a device for measuring refined interface parameters.

Fig. 2 is a schematic view of a thermocouple sealing structure.

Fig. 3 is an assembly schematic of the seal configuration of the present invention.

FIG. 4 is an elevational cross-sectional view of the assembled structure of the seal construction of the present invention.

FIG. 5 is a side sectional view of an assembly structure of the seal structure of the present invention.

FIG. 6 is a schematic structural diagram of a two-phase flow refinement measuring device under high temperature and high pressure conditions according to the present invention.

Reference numbers and corresponding part names in the drawings:

1-sealing element body, 2-through hole, 3-first thermal expansion gap, 4-second thermal expansion gap, 5-electrode wire, 6-penetrating structure, 7-base plate, 8-red copper pad, 9-pressing nut, 10-barrel, 11-thread and 12-thermocouple.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.