Gas sensor assembly structure

Abstract

The utility model discloses a gas sensor assembling structure which comprises a front end shell and a rear end shell, the front end shell and the rear end shell are detachably connected through a connecting structure, the rear end shell is of a circular step type structure, a sheath wire is arranged in the rear end shell in a penetrating mode, and the sheath wire is connected with the front end shell. A CO2 sensor is mounted at the left end of the sheath wire, and the sheath wire is detachably connected with the rear-end shell through a fixing structure; a first mounting thread is arranged at the left end of the circumferential outer surface of the front-end shell, and a second mounting thread is arranged at the right end of the circumferential outer surface of the rear-end shell; and a stainless steel filter screen is detachably mounted in the front-end shell. The gas sensor assembly structure can conveniently realize rapid installation of the stainless steel filter screen, is convenient to operate, improves the efficiency, can guarantee the safety and stability of use, is flexibly suitable for use in different environments, is more flexible to use, and is high in applicability and practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of gas collection, in particular to an assembly structure of a gas sensor. Background Technique

[0002] A gas sensor is a device that converts information such as the composition and concentration of a gas into information that can be utilized by personnel, instruments, computers, etc. It is an important device for gas collection. However, there are still certain defects in the assembly of existing gas sensors:

[0003] 1. When installing the filter screen for dust prevention, water splash prevention, and transient disturbance prevention, first, the filter screen needs to be placed inside the housing and then fixed with an internal connecting nut. The operation is cumbersome and inconvenient. It is very difficult for the nut to be properly fixed in place, reducing the installation efficiency of the filter screen.

[0004] 2. Usually, the outer shell is made of aluminum alloy and has an overall circular structure. The circuit board for placing the sensor is generally also circular. If the outer cover of the head is opened under the power-on state at the scene, since the circuit board has no fixed points, it is very easy to move. The circuit board is likely to touch the metal part of the outer shell, resulting in a short circuit and burning out the sensor.

[0005] 3. When installing and fixing the equipment for gas testing at the scene, sometimes in some environments where the space is relatively narrow and the entire sensor probe cannot be fully placed, affected by the use environment, it is difficult to ensure effective use, and the flexibility of use is poor.

[0006] In view of this, an assembly structure of a gas sensor is proposed to solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to provide an assembly structure of a gas sensor to solve the problems of inconvenient assembly operation, poor use safety and applicability of existing gas sensors mentioned in the above background technique.

[0008] To achieve the above purpose, the utility model provides the following technical solution: An assembly structure of a gas sensor, including a front-end housing and a rear-end housing. The front-end housing and the rear-end housing are detachably connected through a connection structure. The structure shape of the rear-end housing is a circular step style. A sheathed wire is disposed through the rear-end housing. A CO2 sensor is installed at the left end of the sheathed wire. And the sheathed wire is detachably connected to the rear-end housing through a fixing structure;

[0009] A first installation thread is provided on the left end of the circumferential outer surface of the front-end housing, and a second installation thread is provided on the right end of the circumferential outer surface of the rear-end housing;

[0010] A stainless-steel filter screen is detachably installed inside the front-end housing.

[0011] Adopting the above technical solution is convenient for improving the reliability and stability of the equipment in use.

[0012] As a preferred technical solution of the present utility model, an annular installation groove is provided on the inner wall surface of the front end housing, and the stainless steel filter screen is installed in the annular installation groove. The outer diameter of the annular installation groove is larger than the diameter of the stainless steel filter screen, and the inner diameter of the annular installation groove is smaller than the diameter of the stainless steel filter screen.

[0013] Adopting the above technical solution is convenient for adopting the negative tolerance crimping technology to reduce the installation difficulty of the stainless steel filter screen and improve the efficiency.

[0014] As a preferred technical solution of the present utility model, the connection structure includes an internal connection thread groove provided at the right end of the circumferential inner wall surface of the front end housing, and the internal connection thread groove is matched with an external connection thread provided at the left end of the circumferential outer surface of the rear end housing.

[0015] Adopting the above technical solution is convenient for ensuring the connection and fixation of the front end housing and the rear end housing.

[0016] As a preferred technical solution of the present utility model, a first silicone O-ring is provided between the front end housing and the rear end housing, which is used for sealing when the front end housing and the rear end housing are connected.

[0017] Adopting the above technical solution is convenient for ensuring the sealing performance of the fixation of the front end housing and the rear end housing.

[0018] As a preferred technical solution of the present utility model, a second silicone O-ring is sleeved on the circumferential outer wall surfaces of the front end housing and the rear end housing, which is used for sealing when docking and installing with the corresponding fixed clamping seat.

[0019] Adopting the above technical solution is convenient for ensuring the sealing performance when docking with the corresponding fixed clamping seat.

[0020] As a preferred technical solution of the present utility model, the fixing structure includes a fixing nut movably sleeved on the surface of the sheathed wire, and the fixing nut is matched with a fixing internal thread groove provided at the right end of the circumferential inner wall surface of the rear end housing.

[0021] Adopting the above technical solution is convenient for connecting and fixing with the rear end housing through the movable sleeve to realize the fixation of the sheathed wire.

[0022] As a preferred technical solution of the present utility model, a third silicone O-ring is provided between the rear end housing and the fixing nut, which is used for sealing when the rear end housing and the fixing nut are connected and fixed.

[0023] Adopting the above technical solution is convenient for ensuring the sealing performance of the connection and fixation between the movable sleeve and the rear end housing.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows: The gas sensor assembly structure can facilitate the rapid installation of the stainless - steel filter screen, with convenient operation, improved efficiency, and can ensure the safety and stability during use. At the same time, it can be flexibly applied to different environments, with greater flexibility in use, strong applicability, and higher practicality;

[0025] 1. Through the cooperation of the filter screen and the annular installation groove, and by using the negative - tolerance crimping technology to strongly press the stainless - steel filter screen into the annular installation groove, the stainless - steel filter screen can be installed quickly and conveniently, reducing the operation difficulty and improving the installation efficiency of the stainless - steel filter screen.

[0026] 2. Through the structural design of the circular step - like shape of the rear - end housing, when installing the circuit board, it can be directly pressed onto the fixed position of the circular step. In cooperation with the fixed nut and the fixed internal thread groove for connection and fixation, the sheathed wire is fixed, realizing the fixation of the circuit board to prevent short - circuit caused by touching the housing.

[0027] 3. The front - end housing and the rear - end housing are respectively provided with a first installation thread and a second installation thread. According to the situation, by opening the front - end hole or the rear - end hole, the detection part of the sensor can be conveniently extended into the gas for testing, or different installation methods in different spaces can be realized by docking with the corresponding fixed card seat, improving the flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the front - view structural schematic diagram of the present utility model;

[0029] Figure 2 is the front - view exploded connection structural schematic diagram of the present utility model;

[0030] Figure 3 is the three - dimensional structural schematic diagram of the front - end housing of the present utility model;

[0031] Figure 4 is the front - view sectional structural schematic diagram of the front - end housing of the present utility model;

[0032] Figure 5 is the three - dimensional structural schematic diagram of the rear - end housing of the present utility model;

[0033] Figure 6 is the front - view sectional structural schematic diagram of the rear - end housing of the present utility model.

[0034] In the figure: 1. Front - end housing; 2. Rear - end housing; 3. Sheathed wire; 4. CO2 sensor; 5. First installation thread; 6. Second installation thread; 7. Stainless - steel filter screen; 8. Annular installation groove; 9. Connecting internal thread groove; 10. Connecting external thread; 11. First silicone O - ring; 12. Second silicone O - ring; 13. Fixed nut; 14. Fixed internal thread groove; 15. Third silicone O - ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0036] Please refer to Figure 1-6 , the technical solution of the present utility model: A gas sensor assembly structure includes a front-end housing 1 and a rear-end housing 2. The front-end housing 1 and the rear-end housing 2 are detachably connected through a connection structure. The structural shape of the rear-end housing 2 is a circular stepped style. A sheathed wire 3 is disposed through the inside of the rear-end housing 2, and a CO2 sensor 4 is installed at the left end of the sheathed wire 3. And the sheathed wire 3 is detachably connected to the rear-end housing 2 through a fixing structure. A first installation thread 5 is provided on the left end of the circumferential outer surface of the front-end housing 1, and a second installation thread 6 is provided on the right end of the circumferential outer surface of the rear-end housing 2. A stainless steel filter screen 7 is detachably installed inside the front-end housing 1;

[0037] An annular installation groove 8 is formed on the inner wall surface of the front-end housing 1, and the stainless steel filter screen 7 is installed in the annular installation groove 8. The outer diameter of the annular installation groove 8 is larger than the diameter of the stainless steel filter screen 7, and the inner diameter of the annular installation groove 8 is smaller than the diameter of the stainless steel filter screen 7;

[0038] The connection structure includes a connection internal thread groove 9 formed on the right end of the circumferential inner wall surface of the front-end housing 1, and the connection internal thread groove 9 is matched with a connection external thread 10 provided on the left end of the circumferential outer surface of the rear-end housing 2;

[0039] A first silicone O-ring 11 is provided between the front-end housing 1 and the rear-end housing 2, which is used for sealing when the front-end housing 1 and the rear-end housing 2 are connected;

[0040] A second silicone O-ring 12 is sleeved on the circumferential outer wall surfaces of the front-end housing 1 and the rear-end housing 2, which is used for sealing when docking and installing with a corresponding fixed card seat;

[0041] The fixing structure includes a fixing nut 13 movably sleeved on the surface of the sheathed wire 3, and the fixing nut 13 is matched with a fixing internal thread groove 14 formed on the right end of the circumferential inner wall surface of the rear-end housing 2;

[0042] A third silicone O-ring 15 is provided between the rear-end housing 2 and the fixing nut 13, which is used for sealing when the rear-end housing 2 and the fixing nut 13 are connected and fixed.

[0043] Working principle: When in use, the stainless-steel filter screen 7 is strongly pressed into the annular installation groove 8 to achieve the installation and fixation of the stainless-steel filter screen 7, thereby ensuring the purpose of dust prevention, water splash prevention and transient disturbance prevention through the stainless-steel filter screen 7;

[0044] Through the cooperation of the connecting internal thread groove 9 and the connecting external thread 10, the front-end housing 1 and the rear-end housing 2 can be threadedly connected and fixed, and the sealing performance is ensured by the first silicone O-ring 11;

[0045] At the same time, the CO2 sensor 4 is installed in the rear-end housing 2, and the circuit board is directly pressed onto the fixed position of the circular step of the rear-end housing 2. The sheath wire 3 is fixed by the threaded connection of the fixing nut 13 and the fixing internal thread groove 14;

[0046] Through the setting of the first installation thread 5 and the second installation thread 6, the front-end hole or the rear-end hole can be opened according to the situation, and the detection part of the sensor can be conveniently extended into the gas for testing, or different installation methods in different spaces can be realized by docking with the corresponding fixed card holder, improving the flexibility of use. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas sensor assembly structure, comprising a front end housing (1) and a rear end housing (2), characterized in that: The front end housing (1) and the rear end housing (2) are detachably connected via a connection structure, the rear end housing (2) has a circular step-shaped structure, a sheath wire (3) is provided inside the rear end housing (2), a CO2 sensor (4) is installed at the left end of the sheath wire (3), and the sheath wire (3) is detachably connected to the rear end housing (2) via a fixing structure; A first mounting thread (5) is provided at the left end of the circumferential outer surface of the front end housing (1), and a second mounting thread (6) is provided at the right end of the circumferential outer surface of the rear end housing (2); A stainless steel filter screen (7) is detachably mounted inside the front end housing (1).

2. A gas sensor assembly structure according to claim 1, characterized in that: An annular mounting groove (8) is provided on the inner wall surface of the front end housing (1), and the stainless steel filter (7) is installed in the annular mounting groove (8), the outer diameter of the annular mounting groove (8) is larger than the diameter of the stainless steel filter (7), and the inner diameter of the annular mounting groove (8) is smaller than the diameter of the stainless steel filter (7).

3. A gas sensor assembly structure according to claim 1, characterized in that: The connection structure comprises a connection internal thread groove (9) provided at the right end of the circumferential inner wall surface of the front end housing (1), and the connection internal thread groove (9) matches the connection external thread (10) provided at the left end of the circumferential outer surface of the rear end housing (2).

4. A gas sensor assembly structure according to claim 1, characterized in that: A first silicone O-ring (11) is provided between the front end housing (1) and the rear end housing (2), and is used for sealing when the front end housing (1) and the rear end housing (2) are connected.

5. The gas sensor assembly structure according to claim 1, characterized in that: The circumferential outer wall surfaces of the front end housing (1) and the rear end housing (2) are sleeved with a second silicone O-ring (12) which is used for sealing when docking with the corresponding fixed socket for installation.

6. A gas sensor assembly structure according to claim 1, characterized in that: The fixing structure comprises a fixing nut (13) movably sleeved on the surface of the sheath wire (3), and the fixing nut (13) matches a fixing internal thread groove (14) provided on the right end of the circumferential inner wall surface of the rear end housing (2).

7. A gas sensor assembly structure according to claim 6, characterized in that: A third silicone O-ring (15) is provided between the rear end housing (2) and the fixing nut (13), and is used for sealing when the rear end housing (2) and the fixing nut (13) are connected and fixed.

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