Probe assembly of gas detector

Abstract

The utility model discloses a probe assembly of a gas detector, which comprises a lower shell, a detection head is arranged on the inner side of the lower shell, and a lead is arranged on the surface of the lower shell. The lower shell, the detection head, the wire, the conduction cylinder, the conduction hole, the connecting shell and the upper shell are matched, the threaded connection mode of the lower shell, the upper shell and the connecting shell is convenient to assemble and disassemble, internal parts are convenient to maintain and replace, gas can smoothly enter the detector through the matching of the filter opening, the connecting frame and the filter screen, and the detection efficiency is improved. Meanwhile, impurities such as dust are filtered out, the detection head is protected, the structural strength of the connecting shell is enhanced through cooperation of the arc-shaped strips, the arc-shaped strips can deform at the moment of collision due to the arc-shaped structures, part of collision energy is absorbed and dispersed, direct impact on the connecting shell is reduced, and the service life of the detection head is prolonged. Therefore, the internal detection head and other precision parts are protected from being damaged.

Description

Technical Field

[0001] This utility model relates to the technical field of gas detector accessories, specifically a probe assembly for a gas detector. Background Technology

[0002] A gas detector is an instrument for detecting gas concentration. It is suitable for hazardous locations where flammable or toxic gases are present. It can continuously detect the concentration of the gas in the air within the lower explosive limit for a long period of time to ensure the personal safety of personnel in the location. It has been widely used in various mining fields.

[0003] A search revealed a probe assembly for a gas detector disclosed in Chinese patent application number 201921835733.1. This patent includes an upper sensor housing and a lower sensor housing. The bottom of the lower sensor housing has a groove, and an explosion-proof sheet is placed inside the groove. The periphery of the explosion-proof sheet is sealed in the groove with epoxy resin. A large cavity is formed on the inner periphery of the lower sensor housing along the groove. The large cavity is used to house a toxic gas sensor. Multiple wires are connected to the toxic gas sensor. A barrier sheet is placed on top of the toxic gas sensor. Epoxy resin seals the barrier sheet and the lower sensor housing. The epoxy resin seals and fixes the lower part of the multiple wires in the large cavity. The upper sensor housing has a rectangular groove inside and an outlet tube communicating with the upper end of the rectangular groove. This patented design consists of an upper and lower sensor housing as a single, robust assembly. The housing contains a large chamber, large enough to house the toxic gas sensor, barrier plate, and wires. The outlet of the upper sensor housing is mounted on the gas detector housing and uses an explosion-proof threaded connection, making it suitable for explosion-proof environments.

[0004] The patented design features a robust assembly and a large internal chamber, large enough to house the toxic gas sensor, barrier plate, and wires. The sensor's upper housing has a cable outlet mounted on the gas detector's housing, using an explosion-proof threaded connection suitable for explosion-proof environments. However, in actual use, the probe surface lacks corresponding protective components, making it susceptible to damage from external forces during use. Furthermore, the patent lacks a corresponding filtration structure, allowing dust, debris, and other impurities to easily enter the probe's interior. These substances cause physical damage or blockage to the probe, making it difficult to ensure its normal operation and significantly reducing its lifespan.

[0005] Therefore, there is a need to provide a probe assembly for a gas detector to solve this problem. Utility Model Content

[0006] To address the problems mentioned in the background art, the present invention aims to provide a probe assembly for a gas detector, which solves the problems of the lack of corresponding protective components on the probe surface, making it easy for it to be squeezed and damaged by external forces during use, and the easy entry of dust, debris and other impurities into the probe, causing physical damage or blockage to the probe and making it difficult to ensure that the probe can work normally.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a probe assembly for a gas detector, comprising a lower housing, a detection head disposed on the inner side of the lower housing, a wire disposed on the surface of the lower housing, the other end of the wire penetrating the housing and electrically connected to the detection head, a conductive cylinder sleeved on the surface of the detection head, the conductive cylinder being fixedly connected to the housing, a plurality of conductive holes evenly arranged in a ring on the surface of the conductive cylinder, a connecting shell threadedly connected to the surface of the lower housing, an upper housing threadedly connected to the other end of the connecting shell, a plurality of filter openings evenly arranged in a ring on the surface of the connecting shell, a connecting frame snapped into the inside of the filter opening, a filter screen fixedly connected to the inside of the connecting frame, and a plurality of arc-shaped strips evenly arranged in a ring on the surface of the connecting shell.

[0008] As a preferred embodiment of this utility model, the filter port has a movable groove on its wall, and a fastening spring is symmetrically fixedly connected inside the movable groove. A fastening block is fixedly connected to the other end of the fastening spring, and the surface of the fastening block is slidably connected to the movable groove. Fastening grooves are symmetrically opened at both ends of the connecting frame, and the fastening grooves are engaged with the fastening blocks.

[0009] As a preferred embodiment of this utility model, the inner wall of the filter port is symmetrically fixedly connected with an auxiliary block about the fastening block, and the auxiliary block is engaged with another fastening groove.

[0010] As a preferred embodiment of this utility model, the inner wall of the connecting shell is provided with a plurality of actuating holes, and the plurality of actuating holes correspond one-to-one with a plurality of moving slots. The surface of the fastening block is fixedly connected with an actuating block, and the actuating block is slidably connected to the actuating hole.

[0011] As a preferred embodiment of this utility model, a sealing ring is fixedly connected to the surface of the conductor, and the sealing ring is fixedly connected to the lower housing. A shock-absorbing block is provided on the top of the conductive cylinder, and the other end of the shock-absorbing block is in contact with the upper housing.

[0012] As a preferred embodiment of this utility model, both ends of the arc-shaped strip are fixedly connected to fixing blocks, and the surface of the fixing blocks is threaded with screws, with the threaded end of the screws penetrating the fixing blocks and threadedly connected to the connecting shell.

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

[0014] 1. This utility model utilizes the cooperation of a lower housing, a detection head, wires, a conductive cylinder, a conductive hole, a connecting shell, and an upper housing. The threaded connection of the lower housing, upper housing, and connecting shell facilitates assembly and disassembly, making it convenient to maintain and replace internal components. The cooperation of the filter port, connecting frame, and filter screen allows gas to smoothly enter the detector while filtering out dust and other impurities, protecting the detection head. Furthermore, the cooperation of the arc-shaped strip helps to enhance the structural strength of the connecting shell. Due to its arc-shaped structure, the arc-shaped strip can deform upon impact, absorbing and dispersing some of the impact energy, reducing the direct impact on the connecting shell, thereby protecting the internal detection head and other precision components from damage.

[0015] 2. This utility model, through the setting of fastening spring, fastening block and fastening groove, can realize the quick installation and disassembly of the connecting frame, which is convenient for replacing the filter screen. Attached Figure Description

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

[0017] Figure 2 This is a partial cross-sectional perspective view of the structure of this utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of the connecting shell of this utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the connecting frame of this utility model.

[0020] In the diagram: 1. Lower housing; 2. Detection head; 3. Wire; 4. Conducting cylinder; 5. Conducting hole; 6. Connecting shell; 7. Upper housing; 8. Filter port; 9. Connecting frame; 10. Filter screen; 11. Arc-shaped strip; 12. Fastening spring; 13. Fastening block; 14. Fastening groove; 15. Auxiliary block; 16. Actuating port; 17. Actuating block; 18. Sealing ring; 19. Shock-absorbing block; 20. Fixing block. Detailed Implementation

[0021] 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.

[0022] like Figures 1 to 4As shown, the present invention provides a probe assembly for a gas detector, including a lower housing 1, a detection head 2 disposed on the inner side of the lower housing 1, a wire 3 disposed on the surface of the lower housing 1, and the other end of the wire 3 passing through the housing and electrically connected to the detection head 2, a conductive cylinder 4 sleeved on the surface of the detection head 2, and the conductive cylinder 4 fixedly connected to the housing, the surface of the conductive cylinder 4 having a plurality of conductive holes 5 arranged in a ring evenly, the surface of the lower housing 1 being threadedly connected to a connecting shell 6, the other end of the connecting shell 6 being threadedly connected to an upper housing 7, the surface of the connecting shell 6 having a plurality of filter ports 8 arranged in a ring evenly, the inside of the filter ports 8 being snapped with a connecting frame 9, the inside of the connecting frame 9 being fixedly connected to a filter screen 10, and the surface of the connecting shell 6 having a plurality of arc-shaped strips 11 arranged in a ring evenly.

[0023] refer to Figure 2 and Figure 3 The filter port 8 has a movable groove on its wall. A fastening spring 12 is symmetrically fixedly connected inside the movable groove. A fastening block 13 is fixedly connected to the other end of the fastening spring 12. The surface of the fastening block 13 is slidably connected to the movable groove. Fastening grooves 14 are symmetrically opened at both ends of the connecting frame 9. The fastening grooves 14 are engaged with the fastening blocks 13.

[0024] As a technical optimization of this utility model, the fastening spring 12, fastening block 13 and fastening groove 14 enable the quick installation and disassembly of the connecting frame 9, making it convenient to replace the filter screen 10.

[0025] refer to Figure 2 The inner wall of the filter port 8 is symmetrically fixed with an auxiliary block 15 about the fastening block 13, and the auxiliary block 15 is engaged with another fastening groove 14.

[0026] As a technical optimization of this utility model, by setting the auxiliary block 15, the auxiliary block 15 can be engaged with another fastening groove 14, which can further enhance the stability of the installation of the connecting frame 9 and prevent the connecting frame 9 from shaking or falling off during use.

[0027] refer to Figure 3 The inner wall of the connecting shell 6 is provided with several actuation ports 16, and the several actuation ports 16 correspond one-to-one with several moving slots. The surface of the fastening block 13 is fixedly connected with an actuation block 17, and the actuation block 17 is slidably connected to the actuation port 16.

[0028] As a technical optimization of this utility model, the setting of the toggle port 16 and the toggle block 17 makes it convenient for the operator to control the movement of the fastening block 13 by toggle the toggle block 17 without disassembling the connecting shell 6, thereby realizing the disassembly and installation of the connecting frame 9.

[0029] refer to Figure 2A sealing ring 18 is fixedly connected to the surface of the conductor 3, and the sealing ring 18 is fixedly connected to the lower housing 1. A shock-absorbing block 19 is provided on the top of the conduction cylinder 4, and the other end of the shock-absorbing block 19 is attached to the upper housing 7.

[0030] As a technical optimization of this utility model, the sealing ring 18 can prevent external dust, moisture and other substances from entering the detector from the connection between the wire 3 and the lower housing 1, thereby improving the detector's sealing and protection performance.

[0031] refer to Figure 1 and Figure 3 Both ends of the arc-shaped strip 11 are fixedly connected to fixing blocks 20. The surface of the fixing block 20 is threaded with screws, and the threaded end of the screws passes through the fixing block 20 and is threadedly connected to the connecting shell 6.

[0032] As a technical optimization of this utility model, by setting the fixing block 20 and screws, the arc strip 11 can be replaced separately as a vulnerable part, thereby reducing the maintenance cost in the later stage, and enhancing the stability and reliability of the arc strip 11.

[0033] The working principle and usage process of this utility model are as follows: When using this probe assembly, firstly, it is correctly connected to the external gas detector via the wire 3 and powered on. The detector starts working, and the gas in the surrounding environment enters the detection head 2 sequentially through the filter port 8, filter screen 10, and conduction hole 5. The detection head 2 detects the gas and transmits the signal to the external device for processing and display. The user can obtain relevant information about the gas detection through the external device. At this time, the sealing ring 18 on the surface of the wire 3 is tightly connected to the lower housing 1, preventing external dust, water vapor, etc. from entering the detector from the connection between the wire 3 and the lower housing 1, thus playing a sealing and protective role. The shock-absorbing block 19 on the top of the conduction cylinder 4 can buffer the vibration transmitted from the upper housing 7 when the detector is vibrated, reducing the impact of vibration on the detection head 2 and ensuring the accuracy and stability of the detection head 2. The arc-shaped strip 11 on the surface of the connecting shell 6 has a protective and anti-collision function. When the detector is hit by an external collision, the arc-shaped strip 11 absorbs and disperses the impact energy through its own deformation, increasing the contact area with the impacting object and making the force more uniform. The impact force is guided to protect the connecting shell 6 and its internal components from damage. When the filter screen 10 needs to be replaced, the toggle block 17 is slid within the toggle port 16, thereby compressing the fastening block 13 and disengaging it from the fastening groove 14. Then, the connecting frame 9 can be removed. After replacing the filter screen 10, the connecting frame 9 is reinstalled into the filter port 8 according to the installation steps. The fastening groove 14 on the connecting frame 9 first engages with the auxiliary block 15 at the filter port 8, and then the reaction force of the fastening spring 12 is used to push... The movable fastening block 13 is inserted into another fastening groove 14, thereby fixing the connecting frame 9 and enabling the replacement of the filter screen 10. In addition, when overall maintenance is required, the housing 1, connecting housing 6 and upper housing 7 can be disassembled to clean and inspect the internal components such as the detection head 2 and the conduction cylinder 4 to ensure their normal operation. When disassembling, simply turn the corresponding components in the opposite direction of the threaded connection. However, when reinstalling, ensure that all components are installed in place and tightened to guarantee the sealing and stability of the detector.

[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 probe assembly of a gas detector comprising a lower housing (1), characterised in that: The inner side of the lower shell (1) is provided with a detection head (2), the surface of the lower shell (1) is provided with a lead wire (3), and the other end of the lead wire (3) penetrates the shell and is electrically connected with the detection head (2), the surface of the detection head (2) is sleeved with a conducting cylinder (4), and the conducting cylinder (4) is fixedly connected with the shell, a plurality of conducting holes (5) arranged in a ring are formed in the surface of the conducting cylinder (4), the surface of the lower shell (1) is threadedly connected with a connecting shell (6), the other end of the connecting shell (6) is threadedly connected with an upper shell (7), a plurality of filter openings (8) arranged in a ring are formed in the surface of the connecting shell (6), a connecting frame (9) is clamped in the filter opening (8), a filter screen (10) is fixedly connected in the connecting frame (9), and a plurality of arc-shaped strips (11) arranged in a ring are formed in the surface of the connecting shell (6).

2. A gas detector probe assembly according to claim 1, characterised in that: The mouth wall of the filter opening (8) is provided with a moving groove, the inside of the moving groove is fixedly connected with a fastening spring (12) in a symmetrical manner, the other end of the fastening spring (12) is fixedly connected with a fastening block (13), and the surface of the fastening block (13) is in sliding connection with the moving groove, the both ends of the connecting frame (9) are provided with fastening grooves (14) in a symmetrical manner, and the fastening grooves (14) are clamped with the fastening blocks (13).

3. A gas detector probe assembly according to claim 2, wherein: The inner wall of the filter opening (8) is fixedly connected with an auxiliary block (15) in a symmetrical manner about the fastening block (13), and the auxiliary block (15) is clamped with the other fastening groove (14).

4. A gas detector probe assembly according to claim 2, wherein: The inner wall of the connecting shell (6) is provided with a plurality of actuating openings (16), and the plurality of actuating openings (16) are in one-to-one correspondence with the plurality of moving grooves, respectively, the surface of the fastening block (13) is fixedly connected with an actuating block (17), and the actuating block (17) is in sliding connection with the actuating opening (16).

5. A gas detector probe assembly according to claim 1, wherein: The surface of the lead wire (3) is fixedly connected with a sealing ring (18), and the sealing ring (18) is fixedly connected with the lower shell (1), the top of the conducting cylinder (4) is provided with a damping block (19), and the other end of the damping block (19) is attached to the upper shell (7).

6. A gas detector probe assembly according to claim 1, wherein: The both ends of the arc-shaped strip (11) are fixedly connected with a fixed block (20), the surface of the fixed block (20) is threadedly connected with a screw, and the threaded end of the screw penetrates the fixed block (20) and is threadedly connected with the connecting shell (6).

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