Electrical pressure instrument with buffer protection for chemical reaction kettle top

Abstract

This utility model discloses an electrical pressure gauge with buffer protection for the top of a chemical reactor, relating to the field of chemical equipment monitoring technology. It includes an instrument body with a pressure sensor and an electrical signal output interface. The key feature is that it further includes a buffer connector. The bottom of the buffer connector has an interface for connecting to the pressure tap of the reactor, and the top has an instrument mounting interface for mounting the instrument body. A buffer cavity is formed inside the buffer connector, and at least one porous buffer plate is disposed within the buffer cavity. Multiple micropores are evenly distributed on the porous buffer plate. The interface, buffer cavity, and instrument mounting interface are sequentially connected. This utility model, by adding a buffer connector with a porous buffer plate between the instrument body and the pressure tap of the reactor, converts pressure shocks into stable pressure after damping by micropores, reducing the damage of pressure pulsations to the instrument's sensing elements and extending the instrument's service life.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment monitoring technology, specifically to an electrical pressure instrument with buffer protection for the top of a chemical reactor. Background Technology

[0002] In chemical production processes, the reactor is one of the most crucial pieces of equipment. To monitor the pressure inside the reactor in real time and ensure the safety and controllability of the reaction process, electrical pressure gauges, such as pressure transmitters or pressure sensors, are typically installed on top of the reactor. These gauges convert the sensed pressure signals into standard electrical signals, which are then transmitted to the control room for display and interlocking control.

[0003] However, in practical applications, especially under conditions of violent reactions or material scouring and pressure pulsation, existing electrical pressure gauges are directly installed on the pressure taps of the reactor. The violent fluctuations and impacts of the internal media (including gas, liquid, or gas-liquid mixtures) directly and without attenuation act on the pressure sensing elements of the gauges. This continuous and severe pressure shock and pulsation can easily cause premature damage to the core sensing elements of the gauges (such as ceramic diaphragms and diffused silicon cores) due to fatigue, or cause zero-point drift, decreased measurement accuracy, shortened instrument lifespan, increased equipment maintenance costs, and safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide an electrical pressure gauge with buffer protection for the top of a chemical reactor, in order to solve the problems in the prior art where severe pressure pulsation and media impact inside the chemical reactor cause premature damage or measurement inaccuracy of the precision sensing elements of the electrical pressure gauge due to continuous mechanical overload and fatigue.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electrical pressure gauge with buffer protection for the top of a chemical reactor, comprising an instrument body, the instrument body having a pressure sensor and an electrical signal output interface, and further comprising a buffer connector;

[0006] The bottom of the buffer connector is provided with a device interface for connecting to the pressure tap of the reactor, and the top is provided with an instrument mounting interface for mounting the instrument body.

[0007] The buffer connector has a buffer cavity inside, and at least one porous buffer plate is provided in the buffer cavity. The porous buffer plate has a plurality of micropores evenly distributed on it.

[0008] The equipment interface, buffer chamber, and instrument installation interface are connected in sequence, and the medium pressure in the reactor can be buffered by the porous buffer plate and then transmitted to the instrument body.

[0009] Furthermore, the number of the porous buffer plates is two or more, and the inner wall of the buffer cavity is provided with multiple layers of positioning plates arranged in a ring and spaced vertically, and the porous buffer plate is supported between two adjacent layers of positioning plates.

[0010] Furthermore, the micropores on adjacent porous buffer plates are staggered, and the diameter of the micropores is 0.5mm to 2mm.

[0011] Furthermore, both the outer walls of the equipment interface and the instrument mounting interface are provided with threaded portions and are equipped with locking nuts. The equipment interface is connected to the pressure tap of the reactor via the locking nut, and the instrument mounting interface is connected to the instrument body via the locking nut. A sealing ring is provided on the side of the threaded portion away from the buffer connector, and the sealing ring is fitted onto the corresponding equipment interface or instrument mounting interface.

[0012] Furthermore, the buffer connector consists of a detachable docking part one and a docking part two. The equipment interface and the instrument installation interface are fixedly connected to the docking part one. The docking parts one and two are symmetrically fixedly connected to docking plates on their outer sides. The outer side of the docking plate is provided with a concave clamping plate. The concave clamping plate's notch holds the two docking plates together after they are fitted together.

[0013] Furthermore, the mating plates of the first and second mating parts are positioned opposite each other, and a sealing strip is provided on the opposite surface. A concave retaining plate is provided between the mating plates, and the notches on both sides of the concave retaining plate respectively hold the edges of the two mating plates. The mating plates are fastened together by fastening bolts and mating nuts. The fastening bolts pass through the mating plate on one side, the concave retaining plate, the mating plate on the other side, and the sealing strip in sequence, and are locked by the mating nuts, so that the first and second mating parts fit tightly together.

[0014] Compared with existing technologies, the electrical pressure gauge with buffer protection for the top of a chemical reactor provided by this utility model adds an independent buffer connector between the instrument body and the pressure tap of the reactor, and sets up a porous buffer plate in the internal buffer chamber to form a pressure buffer barrier. When the medium pressure with violent fluctuations or impacts in the reactor enters the buffer chamber through the equipment interface, it must pass through the micropores evenly distributed on the porous buffer plate. This process can effectively attenuate, homogenize and stabilize the pressure pulse, converting the unstable impact pressure into stable static pressure, and then transmitting it to the instrument body. This reduces the measurement inaccuracy, mechanical fatigue damage or premature damage caused by the core sensing element of the pressure gauge being directly subjected to instantaneous pressure, and improves the measurement accuracy and service life of the instrument under harsh working conditions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the overall structure of an electrical pressure gauge with buffer protection for the top of a chemical reactor provided in this embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal porous buffer plate and other components of the buffer connector provided in the embodiment of the present utility model;

[0018] Figure 3 A schematic diagram of the structure of the buffer connector and the equipment interface and instrument mounting interface components provided in the embodiments of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal positioning piece component of the docking part two provided in an embodiment of the present utility model;

[0020] Figure 5 A schematic diagram showing the disassembled structure of components such as docking part one and docking part two provided in the embodiments of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Instrument body; 101. Electrical signal output interface; 2. Buffer connector; 201. Connecting part one; 202. Connecting part two; 3. Equipment interface; 301. Threaded part; 4. Instrument mounting interface; 5. Buffer cavity; 6. Multi-hole buffer plate; 7. Micro-hole; 8. Positioning plate; 9. Locking nut; 10. Sealing ring; 11. Connecting plate; 12. Concave clamping plate; 13. Sealing strip; 14. Fastening bolt; 15. Matching nut. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] As attached Figure 1 To be continued Figure 5 As shown:

[0025] Example:

[0026] This utility model provides an electrical pressure instrument with buffer protection for the top of a chemical reactor, including an instrument body 1, which has a pressure sensor and an electrical signal output interface 101, and also includes a buffer connector 2;

[0027] The bottom of the buffer connector 2 is provided with a device interface 3 for connecting to the pressure tap of the reactor, and the top is provided with an instrument mounting interface 4 for mounting the instrument body 1.

[0028] The buffer connector 2 has a buffer cavity 5 inside, and at least one porous buffer plate 6 is provided in the buffer cavity 5. The porous buffer plate 6 has a plurality of micro holes 7 evenly distributed on it.

[0029] The equipment interface 3, buffer chamber 5 and instrument installation interface 4 are connected in sequence, and the medium pressure in the reactor can be buffered by the porous buffer plate 6 and then transmitted to the instrument body 1.

[0030] It should be noted that by adding an independent buffer connector 2 between the instrument body 1 and the pressure tap of the reactor, and setting a porous buffer plate 6 in the internal buffer chamber 5, a pressure buffer barrier is formed. When the medium pressure with violent fluctuations or impacts in the reactor enters the buffer chamber 5 through the equipment interface 3, it must pass through the micropores 7 evenly distributed on the porous buffer plate 6. This process can effectively attenuate, homogenize and stabilize the pressure pulse, converting the unstable impact pressure into a stable static pressure, and then transmitting it to the instrument body 1. This reduces the measurement inaccuracy, mechanical fatigue damage or premature damage caused by the core sensing element of the pressure instrument being directly subjected to instantaneous pressure, and improves the measurement accuracy and service life of the instrument under harsh working conditions.

[0031] Moreover, the design is compact and does not require any changes to the original pressure taps of the reactor and the installation interfaces of the instruments. It can be easily connected in series to the pressure measurement pipeline through the standard equipment interface 3 and the instrument installation interface 4, achieving high-performance protection that can be used immediately after installation. This not only reduces the maintenance costs and production downtime risks caused by frequent instrument failures, but more importantly, by ensuring the continuity and reliability of pressure monitoring, it provides more accurate data support and overpressure protection for the chemical reaction process, thereby improving the overall safety and stability of the production system.

[0032] In this embodiment: the number of porous buffer plates 6 is two or more, and the inner wall of the buffer cavity 5 is provided with multiple layers of positioning pieces 8 arranged in a ring and spaced vertically. The porous buffer plate 6 is supported between two adjacent layers of positioning pieces 8.

[0033] It should be noted that the multi-layer positioning plates 8 form a modular installation structure, which allows multiple porous buffer plates 6 to be stably and evenly spaced in the buffer cavity 5 without the need for complex welding or bonding processes, making assembly simple.

[0034] This layered arrangement requires the medium pressure to pass through multiple buffer plates sequentially, forming a multi-stage buffering effect. Each buffer plate can further consume the kinetic energy of the medium, making the attenuation of pressure pulsations more sufficient and thorough. Therefore, compared with single-stage buffering, it can more effectively suppress high-frequency pressure fluctuations and liquid hammer phenomena, and improve the pressure stabilization effect.

[0035] In this embodiment, the micropores 7 on adjacent porous buffer plates 6 are staggered, and the diameter of the micropores 7 is 0.5mm to 2mm.

[0036] It should be noted that the staggered arrangement of the micro-holes 7 on adjacent buffer plates means that when the medium flows through the buffer chamber 5, its flow path is no longer a straight line, but is forced to change direction multiple times between the buffer plates, forming a zigzag meandering path. This design increases flow resistance and turbulence, and combined with the 0.5mm to 2mm pore size of the micro-holes 7, it can filter out high-frequency pressure pulses and fine solid particles to the maximum extent while ensuring the pressure transmission response speed. This achieves the dual effect of "rectification" and "filtration" of the medium pressure, providing a stable pressure signal for the downstream instruments.

[0037] In this embodiment: the outer walls of the device interface 3 and the instrument mounting interface 4 are both provided with threaded portions 301 and are both equipped with locking nuts 9. The device interface 3 is connected to the pressure tap of the reactor through the locking nuts 9, and the instrument mounting interface 4 is connected to the instrument body 1 through the locking nuts 9. A sealing ring 10 is provided on the side of the threaded portion 301 away from the buffer connector 2. The sealing ring 10 is sleeved on the corresponding device interface 3 or instrument mounting interface 4.

[0038] It should be noted that the use of a threaded connection with a locking nut 9 enables standardized and rapid installation and disassembly of the buffer connector 2 with the reactor and instrument body 1, facilitating on-site construction, routine maintenance, or replacement. The sealing ring 10, located at the end of the threaded portion 301, is pressed against the pressure tap of the reactor or the mounting surface of the instrument body 1 during the tightening of the locking nut 9, forming a reliable static seal. This sealing method effectively prevents media leakage that may occur through the threaded gap, ensuring the sealing safety and long-term reliability of the entire pressure measurement system in high-pressure or corrosive media environments.

[0039] In this embodiment: the buffer connector 2 is composed of a detachable docking part 1 201 and a docking part 2 202. The equipment interface 3 and the instrument installation interface 4 are fixedly connected to the docking part 1 201. The docking parts 1 201 and 2 202 are symmetrically fixedly connected to docking plates 11. The docking plates 11 are provided with concave clamping plates 12 on their outer sides. The concave clamping plates 12 are used to hold the two docking plates 11 together after they are fitted together.

[0040] It should be noted that the buffer connector 2 is designed as a split structure consisting of docking part one 201 and docking part two 202. This structure allows the buffer cavity 5 to be fully opened. When impurities block the micropore 7, it is convenient to clean, inspect or replace the internal porous buffer plate 6, thus improving cleaning efficiency.

[0041] The added concave clamping plate 12 can pre-align and clamp the two mating plates 11 before the fastening bolts 14 are tightened, which facilitates the subsequent bolt tightening operation, plays a role in auxiliary positioning and preventing misalignment, and simplifies the assembly process.

[0042] In this embodiment: the docking plates 11 of the first docking component 201 and the second docking component 202 are positioned opposite each other, and a sealing strip 13 is provided on the opposite surface. A concave retaining plate 12 is provided between the docking plates 11. The notches on both sides of the concave retaining plate 12 are respectively held by the edges of the two docking plates 11. The docking plates 11 are fastened together by fastening bolts 14 and mating nuts 15. The fastening bolts 14 pass through the docking plate 11 on one side, the concave retaining plate 12, the docking plate 11 on the other side and the sealing strip 13 in sequence, and are locked by the mating nuts 15, so that the first docking component 201 and the second docking component 202 fit tightly together.

[0043] It should be noted that the high-strength fastening bolts 14 and mating nuts 15 work together to apply a tremendous clamping force to the two mating parts, ensuring that they will not separate due to internal pressure during operation. The sealing strips 13, located on the opposite sides of the mating plates 11, undergo elastic deformation after being forcefully clamped, tightly filling all the microscopic unevenness at the interface between the two mating parts, thus forming a reliable radial dynamic seal in the middle of the buffer cavity 5. This sealing structure, combined with the end face seal, constitutes a double sealing guarantee, avoiding the risk of leakage of the medium in the buffer cavity 5 from the interface, ensuring the overall sealing integrity of the device. The concave retaining plate 12 is encased in the fastening structure, further enhancing the rigidity and stability of the connection.

[0044] Additionally, it should be noted that the design of this utility model aims to achieve the best balance between protecting the instrument and accurate measurement. Its core concept is to filter out the "high-frequency impact and violent pulsation" that are harmful to the instrument, while transmitting the "steady-state or slowly changing pressure" that represents the process state without damage.

[0045] The following is a detailed analysis:

[0046] 1. Regarding the "response delay" issue:

[0047] Physical principle: Pressure propagates in a fluid medium at the speed of sound, which is extremely fast. The delay caused by the buffer structure mainly comes from the process of fluid flow through the micropores 7. The goal of this invention is to deal with "pressure shocks and pulsations", which are usually high-frequency signals. For reactor control, the key process pressure is the average pressure or the pressure that changes relatively slowly.

[0048] Design trade-offs: The damping effect of the micro-orifice 7 is significant for high-frequency pulsations, but has little effect on steady-state or low-frequency pressure changes. To put it simply, the buffer chamber 5 is like an "electrical filter" that filters out the "high-frequency noise" (pressure shocks) that can damage precision sensors, but allows useful "low-frequency signals" (real process pressure) to pass through smoothly.

[0049] Application scenario matching: In most chemical reaction processes, pressure changes are relatively slow (measured in seconds or minutes) rather than drastic oscillations at the millisecond level. For these mainstream operating conditions, the millisecond-level delay introduced by this invention is negligible and does not affect the monitoring and control of the process.

[0050] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An electrical pressure gauge with buffer protection for use on the top of a chemical reactor, comprising a gauge body (1), wherein the gauge body (1) has a pressure sensor and an electrical signal output interface (101), characterized in that: It also includes a buffer connector (2); The bottom of the buffer connector (2) is provided with a device interface (3) for connecting to the pressure tap of the reactor, and the top is provided with an instrument mounting interface (4) for mounting the instrument body (1). The buffer connector (2) has a buffer cavity (5) inside, and at least one porous buffer plate (6) is provided in the buffer cavity (5). The porous buffer plate (6) has a plurality of micro holes (7) evenly distributed on it. The equipment interface (3), buffer chamber (5) and instrument installation interface (4) are connected in sequence, and the medium pressure in the reactor can be buffered by the porous buffer plate (6) and then transmitted to the instrument body (1).

2. The electrical pressure instrument with buffer protection for the top of a chemical reactor according to claim 1, characterized in that, The number of the porous buffer plates (6) is two or more, and the inner wall of the buffer cavity (5) is provided with a ring-shaped distribution of multiple layers of positioning plates (8) spaced vertically. The porous buffer plates (6) are supported between two adjacent layers of positioning plates (8).

3. The electrical pressure instrument with buffer protection for the top of a chemical reactor according to claim 2, characterized in that, The micropores (7) on adjacent porous buffer plates (6) are staggered and arranged with a diameter of 0.5 mm to 2 mm.

4. The electrical pressure instrument with buffer protection for the top of a chemical reactor according to claim 1, characterized in that, The outer walls of the device interface (3) and the instrument mounting interface (4) are provided with threaded portions (301) and are equipped with locking nuts (9). The device interface (3) is connected to the pressure tap of the reactor through the locking nuts (9), and the instrument mounting interface (4) is connected to the instrument body (1) through the locking nuts (9). A sealing ring (10) is provided on the side of the threaded portion (301) away from the buffer connector (2). The sealing ring (10) is fitted onto the corresponding device interface (3) or instrument mounting interface (4).

5. An electrical pressure instrument with buffer protection for the top of a chemical reactor according to claim 1, characterized in that, The buffer connector (2) consists of a detachable docking part one (201) and a docking part two (202). The equipment interface (3) and the instrument installation interface (4) are fixedly connected to the docking part one (201). The docking parts one (201) and the docking parts two (202) are symmetrically fixedly connected with docking plates (11).

6. An electrical pressure instrument with buffer protection for the top of a chemical reactor according to claim 5, characterized in that, The docking plates (11) of the first docking component (201) and the second docking component (202) are positioned opposite each other, and a sealing strip (13) is provided on the opposite surface. A concave clamping plate (12) is provided between the docking plates (11). The notches on both sides of the concave clamping plate (12) are respectively clamped to the edges of the two docking plates (11). The docking plates (11) are fastened together by fastening bolts (14) and mating nuts (15). The fastening bolts (14) pass through the docking plate (11) on one side, the concave clamping plate (12), the docking plate (11) on the other side and the sealing strip (13) in sequence, and are locked by the mating nuts (15) so that the first docking component (201) and the second docking component (202) fit tightly together.

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