Pressure guide pipe structure and pressure measuring device

Abstract

The utility model relates to a pressure guide pipe structure and a pressure measuring device, and relates to the technical field of measuring instruments. The pressure guide pipe structure comprises a barrel assembly, a guide pipe assembly and an adsorption assembly. The guide pipe assembly is arranged in the cylinder assembly in a penetrating manner, and the guide pipe assembly is configured to allow a pressure taking medium to flow; the adsorption assembly is arranged on the outer wall of the guide pipe assembly, and the adsorption assembly is used for adsorbing impurities in the pressure taking medium; the drying assembly is arranged on the outer wall of the guide pipe assembly and used for adsorbing moisture in the pressure taking medium, and the drying assembly and the adsorption assembly are arranged at intervals in the axial direction of the barrel assembly so that the barrel assembly can be divided into a first cavity, a second cavity and a third cavity which are sequentially arranged in the axial direction and communicate with one another; wherein the first cavity and the third cavity are respectively communicated with the catheter assembly. According to the technical scheme disclosed by the utility model, the interference of impurities and the like in the pressure sampling medium on the measurement precision can be avoided, and the pressure source can be accurately transmitted to the measurement instrument by the pressure guide pipe.

Description

Technical Field

[0001] This utility model relates to the field of measuring instrument technology, and in particular to a pressure guide tube structure and a pressure measuring device. Background Technology

[0002] During the oil and gas field development process, it is necessary to observe and control the pressure of the medium inside pipelines, containers, and equipment. Pressure guide pipes are responsible for organically connecting various pressure measuring instruments and related equipment under test. They are an important component in control and measurement and are mainly used to transmit pressure sources.

[0003] The fidelity and accuracy of pressure transmission through the pressure-sensing pipe determine the stability of natural gas extraction and transportation. However, the pressure-tapping medium within the pipe can interfere with the pressure source signal. Since the pressure-tapping medium is high-pressure natural gas from the formation, water, solid impurities, paraffin wax, and other contaminants in the medium can not only deposit inside the pipe, increasing flow resistance, reducing instrument readings, and affecting measurement accuracy, but also enter the instrument itself, causing measurement distortion. Therefore, reducing the interference of impurities in the pressure-tapping medium on measurement accuracy is a pressing issue that needs to be addressed. Utility Model Content

[0004] This utility model provides a pressure guide tube structure and a pressure measuring device, which can avoid the interference of impurities in the pressure tapping medium on the measurement accuracy and ensure that the pressure guide tube can accurately transmit the pressure source to the pressure measuring instrument.

[0005] In a first aspect, embodiments of the present invention provide a pressure-conducting tube structure, comprising:

[0006] Cylinder assembly;

[0007] A conduit assembly is inserted inside the cylindrical assembly and coaxially arranged with the cylindrical assembly, and the conduit assembly is configured to allow the flow of a pressure tapping medium.

[0008] An adsorption component, disposed on the outer wall of the conduit assembly, is used to adsorb impurities in the pressure tapping medium; and

[0009] A drying component is disposed on the outer wall of the conduit assembly and is used to adsorb moisture in the pressure tapping medium. The drying component and the adsorption component are arranged at intervals along the axial direction of the cylindrical assembly to divide the cylindrical assembly into a first cavity, a second cavity and a third cavity arranged sequentially and connected along the axial direction; wherein the first cavity and the third cavity are respectively connected to the conduit assembly.

[0010] In one embodiment, the adsorption component includes:

[0011] An adsorption box is disposed on the outer wall of the conduit assembly, and the adsorption box has a plurality of first through holes penetrating the adsorption box in the axial direction; and

[0012] The adsorbent is placed inside the adsorption box.

[0013] In one embodiment, the drying component includes:

[0014] A drying box, disposed on the outer wall of the conduit assembly, wherein the drying box has a plurality of second through holes penetrating the drying box in the axial direction; and

[0015] A desiccant is placed inside the drying box.

[0016] In one embodiment, the cylindrical assembly includes a first end and a second end disposed opposite to each other in the axial direction, and the conduit assembly includes:

[0017] An inlet pressure guide tube is disposed at the first end and connected to the first cavity;

[0018] An outlet pressure guide pipe is disposed at the second end and communicates with the third cavity; and

[0019] A one-way valve assembly, with one end mounted on the inlet pressure guide pipe and the other end inserted into the outlet pressure guide pipe;

[0020] The adsorption component and the drying component are both disposed on the outer wall of the single valve assembly.

[0021] In one embodiment, the single-phase valve assembly includes:

[0022] The outer casing has one end threadedly connected to the inlet pressure guide pipe and the other end inserted into the outlet pressure guide pipe;

[0023] An elastic element is disposed within the housing; and

[0024] A sealing ball is disposed within the housing and is connected to the elastic element; wherein the sealing ball is configured to move along the axial direction under the elastic force of the elastic element, so that the sealing ball moves closer to or further away from the inlet pressure guide tube.

[0025] In one embodiment, the housing includes:

[0026] A first housing section, wherein one end of the inlet pressure guide pipe is inserted into the first housing section and threadedly connected to the first housing section; and

[0027] The second housing section is disposed at one end of the first housing section near the outlet pressure guide pipe, and the diameter of the second housing section gradually decreases along the axial direction;

[0028] One end of the elastic element is connected to the inner wall of the second housing segment, and the sealing ball is located inside the first housing segment.

[0029] In one embodiment, the cylindrical assembly includes:

[0030] Main cylinder, the first end being located on the main cylinder; and

[0031] A secondary cylinder body is threadedly connected to the main cylinder body, and the second end is located on the secondary cylinder body;

[0032] The inlet pressure guide pipe is inserted into the main cylinder, and the outlet pressure guide pipe is inserted into the auxiliary cylinder.

[0033] In one embodiment, the inlet pressure guiding pipe is provided with a plurality of pressure guiding through holes so that the inlet pressure guiding pipe is connected to the first cavity.

[0034] In one embodiment, the outlet pressure guide tube includes:

[0035] The first pipe section is disposed on the second end; and

[0036] The second tube section is disposed at the end of the first tube section away from the second end, and the diameter of the second tube section gradually decreases along the axial direction; wherein, there is an annular gap between the outer wall of the second shell section and the inner wall of the second tube section, so that the third cavity is connected to the outlet pressure guide pipe.

[0037] Secondly, this utility model provides a pressure measuring device, including the pressure guiding tube structure as described above.

[0038] Compared with the prior art, the advantages of this utility model embodiment are that by setting the conduit assembly as the channel for the pressure tapping medium to enter and exit the cylinder assembly, the pressure tapping medium can flow through the adsorption assembly and the drying assembly. The pressure tapping medium is discharged after the adsorption assembly adsorbs impurities and the drying assembly adsorbs moisture, thereby achieving drying and filtration of the pressure tapping medium. This avoids the impurities in the pressure tapping medium from interfering with the measurement accuracy, ensures that the pressure guide tube can accurately transmit the pressure source to the pressure measuring instrument, and enables personnel and the automated control system to obtain accurate pressure information in real time, thereby achieving effective detection and control of pressure. Attached Figure Description

[0039] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of the pressure guiding tube structure provided in one embodiment of the present invention;

[0041] Figure 2 yes Figure 1 A schematic diagram of the structure of the single-phase valve assembly provided in the embodiment;

[0042] Figure 3 yes Figure 1 A schematic diagram of the adsorption box provided in the embodiment;

[0043] Figure 4 yes Figure 1 A schematic diagram of the structure of the drying box provided in the Chinese embodiment.

[0044] Figure label:

[0045] 10. Cylindrical assembly; 110. First cavity; 120. Second cavity; 130. Third cavity; 140. Main cylinder; 150. Secondary cylinder;

[0046] 20. Conduit assembly; 210. Inlet pressure guide pipe; 2101. Pressure guide through hole; 220. Outlet pressure guide pipe; 2201. First pipe section; 2202. Second pipe section; 230. One-way valve assembly; 2301. Housing; 2302. Elastic element; 2303. Sealing ball; 2304. First housing section; 2305. Second housing section;

[0047] 30. Adsorption assembly; 310. Adsorption box; 3101. First through hole;

[0048] 40. Drying assembly; 410. Drying box; 4101. Second through hole. Detailed Implementation

[0049] The present invention will be further described below with reference to the accompanying drawings.

[0050] During the oil and gas field development process, it is necessary to observe and control the pressure of the medium inside pipelines, containers, and equipment. Pressure guide pipes are responsible for organically connecting various pressure measuring instruments and related equipment under test. They are an important component in control and measurement and are mainly used to transmit pressure sources.

[0051] From a signal transmission perspective, pressure-conducting pipes act like a "bridge." During natural gas extraction, numerous pressure vessels, pressurization equipment, and pipelines constantly contain media pressure, such as the pressure of water-containing natural gas during extraction and transportation separation, and the pressure of fluids transported in pipelines. Pressure-conducting pipes transmit these pressure source signals to pressure measuring instruments, such as spring-loaded pressure gauges and pressure transmitters, which then amplify or convert the signals to display the measured pressure values. Instrument pressure-conducting pipes also contribute to the safe and stable operation of the system, providing timely and accurate pressure information. Automated control systems can trigger alarms or automatic adjustments based on preset safety parameters. During natural gas extraction, excessively high or low measured pressures can lead to safety accidents. For example, before the natural gas is throttled and depressurized at the wellhead, if the pressure inside the pipeline abnormally increases, the pressure-conducting pipe quickly transmits this signal to the safety control system. The system can then promptly open downhole or surface safety valves to shut off the pressure, preventing serious accidents such as pipeline rupture or explosions. In this case, the instrument pressure-conducting pipe accurately transmits the pressure signal to the measuring instruments, ensuring the reliability of the measurement results and thus guaranteeing the stability of natural gas extraction and transportation.

[0052] Therefore, the fidelity and accuracy of the pressure-conducting pipe determine the stability of natural gas production and transportation. However, the pressure-tapping medium inside the pipe can interfere with the pressure source signal. This medium is high-pressure natural gas from the formation, flowing from the high-pressure gas layer at the bottom of the well to the wellhead, where it undergoes throttling, dehydration, and sand removal before entering the next stage of the gathering and transportation station. During pressure tapping, water, solid impurities, paraffin wax, and other contaminants in the natural gas not only deposit inside the pipe, increasing flow resistance, reducing instrument readings, and affecting accuracy, but also enter the instruments themselves, causing measurement distortion. Therefore, reducing the interference of impurities in the pressure-tapping medium on measurement accuracy is a pressing issue that needs to be addressed.

[0053] Example 1

[0054] like Figure 1 As shown, in order to solve the above-mentioned technical problems, this utility model provides a pressure-conducting pipe structure, including a cylindrical assembly 10, a conduit assembly 20, an adsorption assembly 30, and a drying assembly 40; the conduit assembly 20 is inserted into the cylindrical assembly 10 and coaxially arranged with the cylindrical assembly 10, and the conduit assembly 20 is configured to allow the pressure-taking medium to flow; the adsorption assembly 30 is disposed on the outer wall of the conduit assembly 20, and the adsorption assembly 30 is used to adsorb impurities in the pressure-taking medium; the drying assembly 40 is disposed on the outer wall of the conduit assembly 20 and is used to adsorb moisture in the pressure-taking medium, the drying assembly 40 and the adsorption assembly 30 are arranged at intervals along the axial direction of the cylindrical assembly 10, so as to divide the cylindrical assembly 10 into a first cavity 110, a second cavity 120 and a third cavity 130 arranged sequentially and connected along the axial direction; wherein, the first cavity 110 and the third cavity 130 are respectively connected to the conduit assembly 20.

[0055] As can be seen from the above, by setting the conduit assembly 20 as the channel for the pressure tapping medium to enter and exit the cylinder assembly 10, the pressure tapping medium can flow through the adsorption assembly 30 and the drying assembly 40. The pressure tapping medium is discharged after the adsorption assembly 30 adsorbs impurities and the drying assembly 40 adsorbs moisture, thus achieving the drying and filtration of the pressure tapping medium. This avoids the impurities in the pressure tapping medium from interfering with the measurement accuracy, ensures that the pressure guide tube can accurately transmit the pressure source to the pressure measuring instrument, and enables personnel and the automated control system to obtain accurate pressure information in real time, thereby achieving effective detection and control of pressure.

[0056] It should be noted that the pressure tapping medium can be high-pressure natural gas from the formation.

[0057] Example 2

[0058] like Figure 1 As shown, the pressure-conducting pipe structure includes a cylindrical assembly 10, a conduit assembly 20, an adsorption assembly 30, and a drying assembly 40. The conduit assembly 20 is inserted into the cylindrical assembly 10 and coaxially arranged with the cylindrical assembly 10. The conduit assembly 20 is configured to allow the pressure-conducting medium to flow. The adsorption assembly 30 is disposed on the outer wall of the conduit assembly 20 and is used to adsorb impurities in the pressure-conducting medium. The drying assembly 40 is disposed on the outer wall of the conduit assembly 20 and is used to adsorb moisture in the pressure-conducting medium. The drying assembly 40 and the adsorption assembly 30 are arranged at intervals along the axial direction of the cylindrical assembly 10 to divide the cylindrical assembly 10 into a first cavity 110, a second cavity 120, and a third cavity 130 arranged sequentially and connected along the axial direction. The first cavity 110 and the third cavity 130 are respectively connected to the conduit assembly 20.

[0059] As can be seen from the above, by setting the conduit assembly 20 as the channel for the pressure tapping medium to enter and exit the cylinder assembly 10, the pressure tapping medium can flow through the adsorption assembly 30 and the drying assembly 40. The pressure tapping medium is discharged after the adsorption assembly 30 adsorbs impurities and the drying assembly 40 adsorbs moisture, thus achieving the drying and filtration of the pressure tapping medium. This avoids the impurities in the pressure tapping medium from interfering with the measurement accuracy, ensures that the pressure guide tube can accurately transmit the pressure source to the pressure measuring instrument, and enables personnel and the automated control system to obtain accurate pressure information in real time, thereby achieving effective detection and control of pressure.

[0060] It should be noted that the pressure tapping medium can be high-pressure natural gas from the formation.

[0061] like Figure 3 As shown, in some embodiments, the adsorption assembly 30 includes an adsorption box 310 and an adsorbent; the adsorption box 310 is disposed on the outer wall of the conduit assembly 20, and the adsorption box 310 is provided with a plurality of first through holes 3101 that penetrate the adsorption box 310 in the axial direction; the adsorbent is disposed inside the adsorption box 310.

[0062] By setting multiple first through holes 3101 as channels for the pressure tapping medium to pass through, not only can the pressure tapping medium fully contact the adsorbent for impurity removal, but the pressure tapping medium can also enter the second cavity 120 from the first cavity 110, providing a structural basis for the drying of the drying assembly 40.

[0063] It should be noted that the adsorption box 310 has a screen structure. The gaps in the screen allow the pressure-taking medium to come into contact with the adsorbent, thereby adsorbing impurities in the pressure-taking medium. In addition, the inner wall of the adsorption box 310 is connected to the outer wall of the first housing section 2304, and the outer wall of the adsorption box 310 abuts against the inner wall of the main cylinder 140. This prevents the gap between the adsorption box 310 and the main cylinder 140 from being too large, which would cause the pressure-taking medium to flow directly from the first cavity 110 into the second cavity 120 without passing through the adsorption assembly 30.

[0064] It should also be noted that the number of first through holes 3101 can be set according to specific needs, and multiple first through holes 3101 can be arranged in a ring array around the center of the adsorption box 310.

[0065] It should also be noted that the adsorbent includes, but is not limited to, activated carbon, and this application does not impose any specific restrictions.

[0066] like Figure 4 As shown, in some embodiments, the drying assembly 40 includes a drying box 410 and a desiccant; the drying box 410 is disposed on the outer wall of the conduit assembly 20, and the drying box 410 is provided with a plurality of second through holes 4101 that penetrate the drying box 410 in the axial direction; the desiccant is disposed inside the drying box 410.

[0067] By setting multiple second through holes 4101 as channels for the pressure tapping medium to pass through, not only can the pressure tapping medium fully contact the desiccant for impurity removal, but it can also allow the pressure tapping medium to enter the third chamber 130 from the second chamber 120, so that the pressure tapping medium flows out through the outlet pressure guide pipe 220.

[0068] It should be noted that the drying box 410 has a sieve structure. The gaps in the sieve allow the pressure-taking medium to come into contact with the desiccant, thereby absorbing the moisture in the pressure-taking medium. In addition, the inner wall of the drying box 410 is connected to the outer wall of the first housing section 2304, and the outer wall of the drying box 410 abuts against the inner wall of the main cylinder 140. This prevents the gap between the drying box 410 and the main cylinder 140 from being too large, which would cause the pressure-taking medium to flow directly from the second cavity 120 into the third cavity 130 without passing through the drying component 40.

[0069] It should also be noted that the number of second through holes 4101 can be set according to specific needs, and multiple second through holes 4101 can be arranged in a ring array around the center of the drying box 410.

[0070] It should also be noted that the desiccant includes, but is not limited to, one of silica gel, montmorillonite, activated carbon, alumina, and calcium chloride; this application does not impose any specific restrictions.

[0071] like Figure 1 As shown, in some embodiments, the cylinder assembly 10 includes a first end and a second end disposed opposite to each other in the axial direction, and the conduit assembly 20 includes an inlet pressure guide pipe 210, an outlet pressure guide pipe 220, and a one-way valve group; the inlet pressure guide pipe 210 is disposed at the first end and communicates with the first cavity 110; the outlet pressure guide pipe 220 is disposed at the second end and communicates with the third cavity 130; one end of the one-way valve group 230 is disposed on the inlet pressure guide pipe 210 and the other end is inserted into the outlet pressure guide pipe 220; wherein, the adsorption assembly 30 and the drying assembly 40 are both disposed on the outer wall of the one-way valve group.

[0072] By setting the inlet pressure guide pipe 210 as the inlet for the pressure-taking medium, the pressure-taking medium enters the first chamber 110; by setting the outlet pressure guide pipe 220 as the outlet for the pressure-taking medium, the filtered and dried pressure-taking medium flows out. A one-way valve assembly 230 is installed between the inlet pressure guide pipe 210 and the outlet pressure guide pipe 220 to control the flow between them. When the one-way valve assembly 230 connects the inlet pressure guide pipe 210 and the outlet pressure guide pipe 220, the pressure-taking medium can flow directly from the inlet pressure guide pipe 210 into the outlet pressure guide pipe 220 without passing through the first chamber 110, the second chamber 120, and the third chamber 130, thus facilitating the purging operation of the measuring instrument.

[0073] It should be noted that the inlet pressure guide pipe 210 is connected to the delivery pipe, which is used to deliver the pressure-taking medium; the outlet pressure guide pipe 220 is connected to the measuring instrument, which is used to measure the pressure of the pressure-taking medium, and the measuring instrument includes, but is not limited to, a spring-type pressure gauge and a pressure transmitter; in addition, when venting, the safety valve at the end of the metering device can be opened to achieve venting; when replacing the adsorption device, venting also needs to be opened.

[0074] like Figure 2 As shown, in some embodiments, the one-way valve assembly 230 includes a housing 2301, an elastic element 2302, and a sealing ball 2303; one end of the housing 2301 is threadedly connected to the inlet pressure guide pipe 210 and the other end is inserted into the outlet pressure guide pipe 220; the elastic element 2302 is disposed inside the housing 2301; the sealing ball 2303 is disposed inside the housing 2301 and connected to the elastic element 2302; wherein, the sealing ball 2303 is configured to move axially under the elastic force of the elastic element 2302, so that the sealing ball 2303 approaches or moves away from the inlet pressure guide pipe 210.

[0075] The elastic element 2302 generates a spring force that moves the sealing ball 2303 axially, causing it to move closer to or further away from the inlet pressure guide pipe 210. When the measuring instrument is purging, the pressure in the outlet pressure guide pipe 220 decreases, while the pressure in the inlet pressure guide pipe is greater than that in the outlet pressure guide pipe 220. Under the pressure difference, the sealing ball 2303 overcomes the spring force of the elastic element 2302, moving away from the inlet pressure guide pipe 210 and becoming suspended, forming an airflow channel. The pressure-taking medium flows along the inlet pressure guide pipe, the one-way valve group 230, and the outlet pressure guide pipe 220. Impurities and water in the pressure-taking medium cannot enter the chambers, thus not affecting the first chamber 110, the second chamber 120, and the third chamber 130, ensuring the smooth flow of the first chamber 110, the second chamber 120, and the third chamber 130. The third chamber 130 remains in its original state. When the measuring instrument detects pressure, the pressure difference between the outlet pressure guide pipe 220 and the inlet pressure guide pipe decreases. Under the elastic force of the elastic element 2302, the sealing ball 2303 approaches the inlet pressure guide pipe 210 until the sealing ball 2303 and the end face of the inlet pressure guide pipe 210 are pressed together, blocking the airflow channel. This allows the pressure-taking medium to enter the first chamber 110 from the pressure guide hole 2101, be adsorbed and filtered by the adsorption component 30, enter the second chamber 120, be dried by the drying component 40, and then enter the third chamber 130. Finally, it flows into the measuring instrument from the outlet pressure guide pipe 220, transmitting the medium pressure.

[0076] It should be noted that the elastic element 2302 can be a spring, and the elastic element 2302 is always in a compressed state.

[0077] It should also be noted that the sealing ball 2303 is a hollow sphere, and the diameter of the sealing ball 2303 is larger than the diameter of the inlet pressure guide tube 210.

[0078] It should also be noted that when the measuring instrument is continuously purging, due to the small inner diameter of the second housing section 2305, the pressure of the pressure tapping medium will decrease slightly when it flows through the outlet pressure guide pipe 220 due to the siphon effect. The pressure tapping medium will be replenished through the pressure guide hole 2101, and a small amount of pressure tapping medium in the three chambers will be replaced.

[0079] like Figure 2 As shown, in some embodiments, the outer shell 2301 includes a first shell section 2304 and a second shell section 2305; one end of the inlet pressure guide tube 210 is inserted into the first shell section 2304 and threadedly connected to the first shell section 2304; the second shell section 2305 is disposed at one end of the first shell section 2304 near the outlet pressure guide tube 220, and the diameter of the second shell section 2305 gradually decreases along the axial direction; wherein, one end of the elastic element 2302 is connected to the inner wall of the second shell section 2305, and the sealing ball 2303 is located inside the first shell section 2304.

[0080] By setting the diameter of the second housing section 2305 to gradually decrease along the axial direction, the second housing section 2305 is made into a necked structure, which not only facilitates the fixing and limiting of the spring, but also increases the flow rate of the gas.

[0081] It should be noted that, as Figure 2 As shown, the diameter of the end of the second housing segment 2305 closest to the first housing segment 2304 is greater than the diameter of the end of the second housing segment 2305 furthest from the first housing segment 2304.

[0082] In some embodiments, the cylinder assembly 10 includes a main cylinder 140 and a secondary cylinder 150; a first end is located on the main cylinder 140; the secondary cylinder 150 is threadedly connected to the main cylinder 140, and a second end is located on the secondary cylinder 150; wherein, an inlet pressure guide pipe 210 passes through the main cylinder 140, and an outlet pressure guide pipe 220 passes through the secondary cylinder 150.

[0083] The threaded connection between the main cylinder 140 and the auxiliary cylinder 150 not only facilitates disassembly and assembly, but also makes it convenient to inspect and replace the various components inside the cylinder assembly 10, thereby ensuring the filtration and drying effect.

[0084] like Figure 1 As shown, in some embodiments, the inlet pressure guiding pipe 210 is provided with a plurality of pressure guiding through holes 2101 so that the inlet pressure guiding pipe 210 is connected to the first cavity 110.

[0085] It should be noted that the pressure guiding through hole 2101 penetrates the inlet pressure guiding pipe 210 in the radial direction, and multiple pressure guiding through holes 2101 are arranged circumferentially around the central axis of the inlet pressure guiding pipe 210.

[0086] like Figure 1 As shown, in some embodiments, the outlet pressure guiding pipe 220 includes a first pipe section 2201 and a second pipe section 2202; the first pipe section 2201 is disposed on the second end; the second pipe section 2202 is disposed on the end of the first pipe section 2201 away from the second end, and the diameter of the second pipe section 2202 gradually decreases along the axial direction; wherein, there is an annular gap between the outer wall of the second housing section 2305 and the inner wall of the second pipe section 2202, so that the third cavity 130 is connected to the outlet pressure guiding pipe 220.

[0087] By setting the diameter of the second tube section 2202 to gradually decrease along the axial direction, the second shell section 2305 is made into a necked structure. This not only facilitates the insertion of the second shell section 2305 into the second tube section 2202, but also ensures the size of the annular gap, avoiding an excessively small annular gap, and facilitating the flow of the pressure tapping medium from the annular gap into the outlet pressure guide pipe 220.

[0088] It should be noted that the diameter of the end of the second pipe section 2202 furthest from the first pipe section 2201 is greater than the diameter of the end of the second pipe section 2202 closest to the first pipe section 2201.

[0089] In summary, during operation, the pressure-taking medium enters the inlet pressure-conducting pipe 210 and then flows into the first chamber 110 through the pressure-conducting through-hole 2101. It is then adsorbed by the adsorption component 30, and the adsorbed pressure-taking medium flows into the second chamber 120 through the first through-hole 3101. After drying by the drying component 40, the dried pressure-taking medium flows into the third chamber 130 through the second through-hole 4101, and finally enters the measuring instrument through the outlet pressure-conducting pipe 220. Therefore, this invention improves the accuracy of pressure measurement and reduces the failure rate of the measuring instrument.

[0090] Example 3

[0091] This utility model embodiment also provides a pressure measuring device, including the pressure guiding tube structure of any embodiment of this utility model, thereby having all the technical effects brought about by the technical solutions of the above embodiments.

[0092] It should be noted that the pressure measuring device also includes a measuring instrument connected to the outlet pressure guide pipe 220. The measuring instrument is used to measure the pressure of the pressure tapping medium, and the measuring instrument includes, but is not limited to, a spring-type pressure gauge and a pressure transmitter.

[0093] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pressure-conducting tube structure, characterized in that, include: Cylinder assembly; A conduit assembly is inserted inside the cylindrical assembly and coaxially arranged with the cylindrical assembly, and the conduit assembly is configured to allow the flow of a pressure tapping medium. An adsorption component is disposed on the outer wall of the conduit assembly, and the adsorption component is used to adsorb impurities in the pressure tapping medium; as well as A drying component is disposed on the outer wall of the conduit assembly and is used to adsorb moisture in the pressure tapping medium. The drying component and the adsorption component are arranged at intervals along the axial direction of the cylindrical assembly to divide the cylindrical assembly into a first cavity, a second cavity and a third cavity arranged sequentially and connected along the axial direction; wherein the first cavity and the third cavity are respectively connected to the conduit assembly.

2. The pressure-conducting tube structure according to claim 1, characterized in that, The adsorption component includes: An adsorption box is disposed on the outer wall of the conduit assembly, and the adsorption box has a plurality of first through holes penetrating the adsorption box in the axial direction; and The adsorbent is placed inside the adsorption box.

3. The pressure-conducting tube structure according to claim 1, characterized in that, The drying assembly includes: A drying box, disposed on the outer wall of the conduit assembly, wherein the drying box has a plurality of second through holes penetrating the drying box in the axial direction; and A desiccant is placed inside the drying box.

4. The pressure-conducting tube structure according to any one of claims 1-3, characterized in that, The cylindrical assembly includes a first end and a second end disposed opposite to each other in the axial direction, and the conduit assembly includes: An inlet pressure guide tube is disposed at the first end and connected to the first cavity; An outlet pressure guide pipe is disposed at the second end and communicates with the third cavity; and A one-way valve assembly, with one end mounted on the inlet pressure guide pipe and the other end inserted into the outlet pressure guide pipe; The adsorption component and the drying component are both disposed on the outer wall of the single valve assembly.

5. The pressure-conducting tube structure according to claim 4, characterized in that, The single-phase valve assembly includes: The outer casing has one end threadedly connected to the inlet pressure guide pipe and the other end inserted into the outlet pressure guide pipe; An elastic element is disposed within the housing; and A sealing ball is disposed within the housing and is connected to the elastic element; wherein the sealing ball is configured to move along the axial direction under the elastic force of the elastic element, so that the sealing ball moves closer to or further away from the inlet pressure guide tube.

6. The pressure-conducting tube structure according to claim 5, characterized in that, The outer casing includes: A first housing section, wherein one end of the inlet pressure guide pipe is inserted into the first housing section and threadedly connected to the first housing section; and The second housing section is disposed at one end of the first housing section near the outlet pressure guide pipe, and the diameter of the second housing section gradually decreases along the axial direction; One end of the elastic element is connected to the inner wall of the second housing segment, and the sealing ball is located inside the first housing segment.

7. The pressure-conducting tube structure according to claim 4, characterized in that, The cylindrical assembly includes: Main cylinder, the first end being located on the main cylinder; and A secondary cylinder body is threadedly connected to the main cylinder body, and the second end is located on the secondary cylinder body; The inlet pressure guide pipe is inserted into the main cylinder, and the outlet pressure guide pipe is inserted into the auxiliary cylinder.

8. The pressure-conducting tube structure according to claim 4, characterized in that, The inlet pressure guiding pipe is provided with multiple pressure guiding holes so that the inlet pressure guiding pipe is connected to the first cavity.

9. The pressure-conducting tube structure according to claim 6, characterized in that, The outlet pressure guiding pipe includes: The first pipe section is disposed on the second end; and The second tube section is disposed at the end of the first tube section away from the second end, and the diameter of the second tube section gradually decreases along the axial direction; wherein, there is an annular gap between the outer wall of the second shell section and the inner wall of the second tube section, so that the third cavity is connected to the outlet pressure guide pipe.

10. A pressure measuring device, characterized in that, Includes the pressure-conducting tube structure as described in any one of claims 1-9.

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