Anti-corrosion sealing structure of ammonia-resistant sensor

Abstract

The utility model belongs to ammonia -resistant sensor technical field, and disclose a kind of anticorrosive sealing structure of ammonia -resistant sensor, including double -layer shell and the sensor main body in double -layer shell, the bottom of double -layer shell is fixedly connected with cable conduit, the connecting cable is provided in the cable conduit, the end of the connecting cable is inserted into double -layer shell and connects sensor main body, interface sealing assembly is provided in the cable conduit bottom, double -layer shell adopts the gradient protection design of shell, sealing cabin, cavity, with significant ammonia corrosion prevention advantage, create stable low ammonia corrosion environment for internal sensor main body, effectively improve the ammonia corrosion resistance of sensor whole and service life, interface sealing assembly realizes multiple reliable sealing to cable interface, can effectively block ammonia gas from the gap between cable and conduit infiltration, cut off the path of ammonia gas erosion from interface link.

Description

Technical Field

[0001] This utility model belongs to the technical field of ammonia-resistant sensors, specifically an anti-corrosion sealing structure for an ammonia-resistant sensor. Background Technology

[0002] Ammonia is a highly corrosive alkaline gas widely found in chemical synthesis, cold storage, and agricultural production. Ammonia-resistant sensors, as core components for detecting ambient ammonia concentration, rely heavily on corrosion resistance and sealing performance for long-term stable operation. If ammonia enters the sensor, it will corrode the circuitry and sensitive elements, directly leading to decreased detection accuracy or even device failure. Therefore, creating a sensor structure with efficient corrosion resistance and reliable sealing capabilities is a crucial prerequisite for ensuring the applicability and lifespan of ammonia-resistant sensors.

[0003] However, the existing structural designs of ammonia-resistant sensors still have significant shortcomings. On the one hand, the housings mostly adopt a single-layer structure or a simple sealed chamber design, lacking the ability to "gradiently block" ammonia gas, allowing ammonia gas to easily penetrate directly into the interior through the housing. Even those that use double-layer housings often fail to effectively intercept trace amounts of ammonia gas due to the lack of targeted adsorption protection design in the interlayer. On the other hand, the sealing structure at the cable interface connecting the sensor to the outside is relatively simple (such as using only a single sealing ring or threaded seal), which is prone to sealing failure under long-term vibration, temperature changes, and other operating conditions, allowing ammonia gas to easily enter through the interface gaps. At the same time, the connection between the cable and the conduit also lacks multiple sealing protections, further reducing the overall reliability of corrosion resistance, making it difficult for existing sensors to operate stably in harsh environments with high concentrations and long-term contact with ammonia gas.

[0004] Therefore, a corrosion-resistant sealing structure for an ammonia-resistant sensor is proposed to address the above problems. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides an anti-corrosion sealing structure for an ammonia-resistant sensor, which has the advantages of preventing ammonia corrosion through gradient barrier of a double-layer shell and synergistic protection with adsorption filler, and multiple sealing of the interface sealing component.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant sealing structure for an ammonia-resistant sensor, comprising a double-layer shell and a sensor body disposed within the double-layer shell, a cable conduit fixedly connected to the bottom of the double-layer shell, a connecting cable disposed within the cable conduit, the end of the connecting cable extending into the double-layer shell and connecting to the sensor body, and an interface sealing component disposed at the bottom of the cable conduit.

[0007] Preferably, the double-layer shell includes an outer shell, a sealed chamber is provided inside the outer shell, a cavity is formed between the sealed chamber and the outer shell, and the cavity is filled with adsorbent filler.

[0008] Preferably, a detection port is provided on the front side of the outer casing, and a channel is constructed between the detection port and the sealed chamber for the detection element of the sensor body to pass through.

[0009] Preferably, the outer casing is fixed with symmetrically arranged fixing ears on both sides, and fixing holes are provided on the fixing ears.

[0010] Preferably, the inner wall of the cable conduit is provided with sealing rings that are equidistantly arranged, and the sealing rings are in close contact with the connecting cable.

[0011] Preferably, the interface sealing assembly includes a fixed arc-shaped sleeve for fixing the top of the cable conduit, a matching movable arc-shaped sleeve on the front side of the fixed arc-shaped sleeve, ear plates on both sides of the fixed arc-shaped sleeve and the movable arc-shaped sleeve, the ear plates being connected by fasteners, and multiple equidistant lip-shaped sealing strips on the inner walls of the fixed arc-shaped sleeve and the movable arc-shaped sleeve.

[0012] Preferably, the ear plate has a through hole through which the screw of the fastener passes.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The double-layer shell of this utility model adopts a gradient protection design of outer shell, sealed chamber and cavity, which has significant advantages in preventing ammonia corrosion. The outer shell, as the first line of defense, can directly resist the direct impact and corrosion of external ammonia gas and delay the initial penetration of ammonia gas. The adsorption filler filled in the cavity between the sealed chamber and the outer shell can efficiently adsorb the trace amount of ammonia gas that has penetrated through the outer shell, forming a dual protection mechanism of physical barrier and chemical adsorption. This greatly reduces the amount of ammonia gas that penetrates into the sealed chamber where the sensor body is located, creating a stable low ammonia corrosion environment for the internal sensor body, and effectively improving the overall ammonia corrosion resistance and service life of the sensor.

[0015] 2. This utility model's interface sealing assembly achieves multiple reliable seals at the cable interface through a combination design of a fixed arc sleeve, a movable arc sleeve, and multiple sets of lip sealing strips. The detachable structure of the fixed arc sleeve and the movable arc sleeve facilitates the installation and subsequent maintenance of the connecting cable, and the fasteners on both sides of the ear plate ensure that the sleeve's clamping force on the cable is uniform and stable. At the same time, the multiple sets of lip sealing strips evenly distributed on the inner wall of the sleeve can form a multi-layer sealing ring on the surface of the connecting cable. This not only effectively prevents ammonia gas from seeping in through the gap between the cable and the conduit, but also accommodates the slight displacement of the cable caused by temperature changes or vibration, avoiding sealing failure. It completely cuts off the path of ammonia gas corrosion at the interface, further enhancing the overall sealing reliability of the sensor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a structural schematic diagram of the present invention from another angle;

[0019] Figure 4 This is a schematic diagram of the interface sealing assembly of this utility model;

[0020] Figure 5 This is a schematic diagram of the cable conduit and fixing arc sleeve of this utility model.

[0021] In the diagram: 1. Double-layer shell; 101. Outer shell; 102. Sealed chamber; 103. Cavity; 104. Adsorption packing;

[0022] 2. Cable conduit; 3. Connecting cables;

[0023] 4. Interface sealing assembly; 401. Fixed arc sleeve; 402. Movable arc sleeve; 403. Ear plate; 404. Fastener; 405. Lip sealing strip; 406. Through hole;

[0024] 5. Inspection port; 6. Fixing ear; 7. Fixing hole; 8. Sealing ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1 to 5 As shown, this utility model provides a corrosion-resistant sealing structure for an ammonia-resistant sensor, including a double-layer housing 1 and a sensor body disposed within the double-layer housing 1. Through gradient barrier and multiple sealing design, the corrosion resistance and operational stability of the sensor in an ammonia-containing environment can be significantly improved. A cable conduit 2 is fixedly connected to the bottom of the double-layer housing 1, and a connecting cable 3 is disposed inside the cable conduit 2. The end of the connecting cable 3 extends into the double-layer housing 1 and connects to the sensor body. An interface sealing component 4 is disposed at the bottom of the cable conduit 2 to block the penetration path of ammonia gas from the cable interface.

[0027] Specifically, the double-layer shell 1 includes an outer shell 101, a sealed chamber 102 is provided inside the outer shell 101, a cavity 103 is formed between the sealed chamber 102 and the outer shell 101, and the cavity 103 is filled with adsorbent filler 104.

[0028] Furthermore, a detection port 5 is provided on the front side of the outer casing 101, and a channel is constructed between the detection port 5 and the sealed chamber 102 for the detection element of the sensor body to pass through.

[0029] Furthermore, the outer casing 101 is fixed with symmetrically arranged fixing ears 6 on both sides, and fixing holes 7 are provided on the fixing ears 6 to facilitate the stable installation of the sensor as a whole and to adapt to long-term use in vibration environment.

[0030] It is worth noting that the inner wall of the cable conduit 2 is provided with equally spaced sealing rings 8. The sealing rings 8 are tightly attached to the connecting cable 3, which can block ammonia gas from seeping through the gap between the connecting cable 3 and the inner wall of the conduit through multiple seals, thereby enhancing the sealing performance at the cable passage.

[0031] It is worth noting that the interface sealing assembly 4 includes a fixed arc-shaped sleeve 401 that fixes the top of the connecting cable conduit 2. A matching movable arc-shaped sleeve 402 is provided on the front side of the fixed arc-shaped sleeve 401. Ear plates 403 are provided on both sides of the fixed arc-shaped sleeve 401 and the movable arc-shaped sleeve 402. The ear plates 403 are connected by fasteners 404. The clamping force of the sleeve on the connecting cable 3 can be uniform and stable by adjusting the fasteners 404. Multiple equidistant lip-shaped sealing strips 405 are provided on the inner walls of the fixed arc-shaped sleeve 401 and the movable arc-shaped sleeve 402. These can form a multi-layer sealing ring on the surface of the connecting cable 3, which can effectively prevent ammonia gas from entering and can also accommodate the slight displacement of the cable caused by temperature changes or vibration, thus avoiding sealing failure.

[0032] It is worth mentioning that the ear plate 403 has a through hole 406, through hole 406 for the screw of the fastener 404 to pass through, ensuring that the fastener 404 is firmly installed, and further ensuring the long-term sealing reliability of the interface sealing assembly 4.

[0033] Working principle and process: When the sensor is in an ammonia-containing environment, the outer shell 101 of the double-layered housing 1 first comes into contact with the external ammonia gas. Due to its own properties, it blocks most of the direct corrosion of the ammonia gas, reducing the initial penetration. A small amount of ammonia gas that penetrates the outer shell 101 enters the cavity 103 between the sealed chamber 102 and the outer shell 101, where it is adsorbed by the adsorption filler 104 inside the cavity 103, cutting off its path of diffusion inward and significantly reducing the ammonia concentration. The sealed chamber 102 acts as the last barrier, isolating the internal sensor body from the external environment, ensuring that the core components are in a low-ammonia corrosion environment. Simultaneously, the detection port 5 on the front side of the outer shell 101 provides a channel for the sensor detection element to communicate with the external environment. To achieve normal detection, at the interface contact, at the mating point of the connecting cable 3 and the cable conduit 2, the sealing ring 8 on the inner wall of the cable conduit 2 forms a preliminary seal through multiple tight fits, blocking ammonia gas from penetrating along the gap. In the interface sealing assembly 4 at the bottom of the cable conduit 2, the fixed arc sleeve 401 and the movable arc sleeve 402 hold the connecting cable 3 tightly through the fasteners 404 on the ear plates 403 on both sides. Multiple lip-shaped sealing strips 405 on the inner wall form a multi-layer sealing ring on the surface of the connecting cable 3, which not only further blocks ammonia gas intrusion, but also adapts to the slight displacement of the cable caused by temperature changes or vibration, maintaining a long-term sealing effect. Finally, through the synergistic effect of each component, the sensor is guaranteed to work stably in an ammonia-containing environment.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant sealing structure for an ammonia-resistant sensor, comprising a double-layer housing (1) and a sensor body disposed within the double-layer housing (1), characterized in that: The bottom of the double-layer housing (1) is fixedly connected to a cable conduit (2), and a connecting cable (3) is provided inside the cable conduit (2). The end of the connecting cable (3) extends into the double-layer housing (1) and connects to the sensor body. An interface sealing assembly (4) is provided at the bottom of the cable conduit (2).

2. The corrosion-resistant sealing structure of an ammonia-resistant sensor according to claim 1, characterized in that: The double-layer shell (1) includes an outer shell (101), a sealed chamber (102) is provided inside the outer shell (101), a cavity (103) is formed between the sealed chamber (102) and the outer shell (101), and the cavity (103) is filled with adsorbent filler (104).

3. The corrosion-resistant sealing structure of an ammonia-resistant sensor according to claim 2, characterized in that: The front side of the outer shell (101) is provided with a detection port (5), and a channel is constructed between the detection port (5) and the sealed chamber (102) for the detection element of the sensor body to pass through.

4. The corrosion-resistant sealing structure of an ammonia-resistant sensor according to claim 2, characterized in that: The outer shell (101) is fixed with symmetrically arranged fixing ears (6) on both sides, and fixing holes (7) are provided on the fixing ears (6).

5. The corrosion-resistant sealing structure of an ammonia-resistant sensor according to claim 1, characterized in that: The inner wall of the cable conduit (2) is provided with sealing rings (8) arranged at equal intervals, and the sealing rings (8) are in close contact with the connecting cable (3).

6. The corrosion-resistant sealing structure of an ammonia-resistant sensor according to claim 1, characterized in that: The interface sealing assembly (4) includes a fixed arc sleeve (401) for fixing the top of the cable conduit (2). A matching movable arc sleeve (402) is provided on the front side of the fixed arc sleeve (401). Ear plates (403) are provided on both sides of the fixed arc sleeve (401) and the movable arc sleeve (402). The ear plates (403) are connected by fasteners (404). Multiple equidistant lip sealing strips (405) are provided on the inner walls of the fixed arc sleeve (401) and the movable arc sleeve (402).

7. The corrosion-resistant sealing structure of an ammonia-resistant sensor according to claim 6, characterized in that: The ear plate (403) has a through hole (406) through which the screw of the fastener (404) passes.

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