Pumping and diffusing dual-purpose portable gas detector

Abstract

The utility model provides a pumping and diffusion dual-purpose portable gas detector, and belongs to the technical field of detection equipment. The problem that an existing single-use detector cannot continue detection after being damaged is solved. The dual-purpose portable gas detector comprises a detection main body, the detection main body is composed of a shell with an inner cavity, a pump body with an air inlet and an air outlet and a detection unit, the inner cavity is composed of a detection cavity part, a cavity part and a control cavity part, and the pump body and the detection unit are both arranged in the shell and connected with the shell. The air inlet in the pump body is provided with an air suction pipe which is connected with the air inlet and extends out of the shell, the air outlet in the pump body is provided with a communicating pipe which is connected with the air outlet and enables the air outlet to be connected with the detection unit, and the upper end face, located in the cavity, of the shell is provided with a communicating opening which enables the cavity to be connected with the outside and forms diffusion type detection. The device has the advantage of dual-purpose detection.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection equipment and relates to a portable gas detector for dual-purpose pumping and diffusion. Background Art

[0002] A gas detector is an instrument tool for detecting gas leakage concentrations, including portable gas detectors, fixed gas detectors, and online gas detectors. Gas sensors are mainly used to detect the types of gases present in the environment. Gas sensors are sensors used to detect the composition and content of gases. With the development of science and technology, portable gas detectors have become increasingly popular to facilitate gas detection. Portable gas detectors generally use pump suction detection, which has high detection efficiency. However, in actual use, the gas pump may be damaged, resulting in detection failure and the inability to detect gas. If the detection continues, it needs to be replaced. If there is no spare detector, it needs to be taken out again, which is relatively cumbersome and affects the detection efficiency, thus failing to meet the use requirements. Summary of the Invention

[0003] The purpose of the utility model is to provide a dual-purpose gas detector to solve the above problems in the prior art.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a portable dual-purpose gas detector for pump suction and diffusion, including a detection body, characterized in that the detection body is composed of a shell including an inner cavity, a pump body with an air inlet and an air outlet, and a detection unit, and the inner cavity is composed of a detection cavity part, a cavity part, and a control cavity part, the pump body and the detection unit are both arranged in the shell and connected thereto, the air inlet in the pump body is provided with an air suction pipe connected thereto and extending out of the shell, the air outlet in the pump body is provided with a connecting pipe connected thereto and connecting the air outlet to the detection unit, and the upper end face of the shell located at the cavity is provided with a connecting port which connects the cavity with the outside and forms a diffusion detection.

[0005] In the above-mentioned portable gas detector for pumping and diffusion, the shell is composed of an upper shell and a lower shell spliced together, and the shell is provided with a filter plate connected to the connecting port and used to reduce the entry of impurities into the filter plate.

[0006] In the above-mentioned pump-suction and diffusion dual-purpose portable gas detector, the detection unit is composed of a number of detection chambers with detection cavities and a number of sensors, the same number as the detection chambers, which are arranged in the corresponding detection chambers and used to detect gas. The upper ends of the several detection chambers are connected to the inner wall of the upper shell. The upper end surface of the upper shell located at the detection cavity is provided with an axially recessed recessed groove. The bottom surface of the groove of the upper shell located at the corresponding detection chamber is provided with a through hole groove connected to the detection cavity. The upper shell is provided with a number of axially inwardly recessed recessed grooves on the bottom surface of the groove for connecting the detection chamber. Several of the recessed grooves are grouped into a group to form a plurality of detection structures. The bottom surface of the recessed grooves in the above-mentioned detection structure is provided with a through hole penetrating the upper shell. The inner end surface of the upper shell located at the through hole is provided with an annular protrusion that protrudes axially outward and is connected to the connecting pipe.

[0007] In the above-mentioned portable gas detector for pump suction and diffusion, the upper shell is provided with a sealing unit located at the recessed groove, which is connected to the upper shell and used to seal the recessed groove. The sealing unit consists of a lower pressure plate, a middle pressure plate and an upper pressure plate. The lower pressure plate is provided on the bottom surface of the groove and connected thereto, the middle pressure plate is provided on the lower pressure plate and connected thereto, and the upper pressure plate is provided on the middle pressure plate and connected thereto. Both sides of the upper pressure plate are provided with locking feet connected thereto, which cooperate with the lower shell and form a snap-fit structure.

[0008] In the above-mentioned portable gas detector for pump suction and diffusion, a plurality of protrusions are provided on the end faces where the middle pressure plate and the lower pressure plate are in contact, which protrude axially downward and leave a distance between the middle pressure plate and the lower pressure plate. A plurality of annular protrusions are provided on the lower end face of the middle pressure plate, which protrude axially outward and pass through the lower pressure plate and extend into the upper shell. An annular conflicting portion is provided on the inner peripheral wall of the upper shell at the annular protrusion, which protrudes axially outward and conflicts with the annular protrusion. The annular protrusion and the annular conflicting portion are coaxially arranged, and a through groove portion is provided on the end face of the lower pressure plate at the corresponding through hole groove.

[0009] Compared with the existing technology, this portable gas detector with pumping and diffusion function has the following advantages:

[0010] 1. The detection body is composed of a shell including an inner cavity, a pump body with an air inlet and an air outlet, and a detection unit. The inner cavity is composed of a detection cavity part, a cavity part, and a control cavity part. The pump body and the detection unit are both arranged in the shell and connected thereto. The air inlet in the pump body is provided with an air suction pipe connected thereto and extending out of the shell. The air outlet in the pump body is provided with a connecting pipe connected thereto and connecting the air outlet to the detection unit. A connecting port is provided on the upper end surface of the shell located at the cavity, which connects the cavity with the outside and forms a diffusion detection. The above-mentioned structure enables the portable detector to have two detection modes, thereby meeting the detection needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the three-dimensional structure of the portable gas detector with pumping and diffusion functions.

[0012] Figure 2 This is a top view of the pump-diffusion dual-purpose portable gas detector with part of its shell removed.

[0013] Figure 3 This is a schematic diagram of the cross-sectional structure of the portable gas detector for pumping and diffusion.

[0014] In the figure, 2, pump body; 3, upper shell; 4, lower shell; 5, filter plate; 6, detection chamber; 7, recessed groove; 8, annular protrusion; 9, lower pressure plate; 10, middle pressure plate; 11, upper pressure plate; 12, locking buckle foot; 13, protrusion 1; 14, annular protrusion; 15, annular interference part. DETAILED DESCRIPTION

[0015] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0016] like Figure 1 、 Figure 2 、 Figure 3As shown, the portable gas detector for pump suction and diffusion comprises a detection body, which is composed of a shell including an inner cavity, a pump body 2 with an air inlet and an air outlet, and a detection unit. The inner cavity is composed of a detection cavity part, a cavity part, and a control cavity part. The pump body 2 and the detection unit are both arranged in the shell and connected thereto. The pump body 2 is located at the junction of the detection cavity part and the cavity part. The detection unit is located in the detection cavity part. The shell is located in the control cavity part and is provided with a circuit board structure connected thereto and used for the overall operation of the controller. The air inlet in the pump body 2 is provided with an air intake pipe connected thereto and extending out of the shell. The air intake pipe is provided with an air intake joint connected thereto. The shell is provided with a mounting hole for the suction pipe to extend and install, and the air outlet in the pump body 2 is provided with a connecting pipe connected to it and connecting the air outlet to the detection unit. The shell is provided with a connecting port on the upper end face of the cavity to connect the cavity with the outside and form a diffusion detection. The gas enters the cavity through the connecting port, so that the detection gas contacts the detection unit, thereby reaching the diffusion detection. The detection unit is composed of a number of detection chambers 6 with detection cavities and a number of sensors with the same number as the detection chambers 6, which are arranged in the corresponding detection chambers 6 and are used to detect gas. The upper ends of the several detection chambers 6 are connected to the inner surface of the upper shell 3. The walls are connected, and the detection chambers 6 are all located in the detection cavity. The upper shell 3 is located on the upper end surface of the detection cavity and is provided with an axially concave recessed groove. The upper shell 3 is located on the bottom surface of the groove corresponding to the detection chamber 6 and is provided with a through-hole groove connected to the detection cavity. The upper shell 3 is located on the bottom surface of the groove and is provided with a plurality of axially inwardly recessed recessed grooves 7 for communicating with the detection chamber 6. A plurality of the recessed grooves 7 are grouped into a plurality of detection structures (two or three). A through hole is provided on the bottom surface of the recessed grooves 7 in the above-mentioned detection structure, and a ring is provided on the inner end surface of the upper shell at the through hole to bulge outward axially and be connected to the connecting pipe. shaped protrusion 8, a shunt pipe connected to it is provided on the connecting pipe, the pump body 2 is connected to multiple detection structures through the shunt pipe, the upper shell 3 is located at the recessed groove and is provided with a sealing unit connected to it and used to seal the recessed groove, the sealing unit is composed of a lower pressure plate 9, a middle pressure plate 10 and an upper pressure plate 11, the lower pressure plate 9 is provided on the bottom surface of the groove and is connected thereto, the middle pressure plate 10 is provided on the lower pressure plate 9 and is connected thereto, the upper pressure plate 11 is provided on the middle pressure plate 10 and is connected thereto, both sides of the upper pressure plate 11 are provided with locking buckles 12 connected thereto, and cooperate with the lower shell 4 to form a snap-fit structure.

[0017] To elaborate further, in order to facilitate assembly, the shell is composed of an upper shell 3 and a lower shell 4, and the shell is provided with a partition connected to it at the cavity part and the control cavity part. The partition can limit the position of part of the diffused gas to facilitate its entry into the detection unit. The shell is provided with a filter plate 5 connected to it at the connecting port and used to reduce the entry of impurities. The filter plate 5 is provided with a plurality of filter holes, and the filter holes can be set according to actual needs.

[0018] To elaborate further, in order to facilitate diffusion-type detection and ensure sealing when not in use, the end surface where the middle pressure plate 10 and the lower pressure plate 9 fit together is provided with a plurality of axially downwardly protruding protrusions 13 that leave a distance between the middle pressure plate 10 and the lower pressure plate 9, and the lower end surface of the middle pressure plate 10 is provided with a plurality of axially outwardly protruding annular protrusions 14 that penetrate the lower pressure plate 9 and extend into the upper shell 3, and the upper shell 3 is provided with an annular conflicting portion 15 that protrudes axially outward and conflicts with the annular protrusion 14 on the inner peripheral wall of the annular protrusion 14, and an assembly groove for the annular protrusion 14 to be inserted and installed is provided on the end surface of the annular conflicting portion 15, and a through hole that connects the assembly groove with the inner cavity is provided on the bottom surface of the assembly groove. The inner diameter of the matching groove is larger than the outer diameter of the annular protrusion 14, and it is also sealed by the annular protrusion 14. A spring can be arranged between the annular resistance portion 15 and the convex protrusion. The above-mentioned upper shell 3 is located at the recessed groove and is provided with a limiting ring connected to it and used to limit the position of the medium pressure plate 10. The limiting ring prevents the medium pressure plate 10 from escaping from the recessed groove after the locking buckle 12 is opened. The annular protrusion 14 and the annular resistance portion 15 are coaxially arranged, and the lower pressure plate 9 is provided with a through groove portion on the end face corresponding to the through hole groove. When the locking buckle foot 12 is opened, the upper pressure plate 11 and the medium pressure plate 10 are loosened, thereby separating the annular protrusion 14 from the annular resistance portion 15, so that the diffused gas can enter the through groove portion, and then enter the detection chamber 6 for detection.

[0019] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0020] Although the term "etc." is frequently used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restriction is contrary to the spirit of the present invention.

Claims

1. A portable gas detector for pumping and diffusion, including a detection body, characterized in that: The detection body is composed of a shell including an inner cavity, a pump body (2) with an air inlet and an air outlet, and a detection unit, and the inner cavity is composed of a detection cavity part, a cavity part, and a control cavity part. The pump body (2) and the detection unit are both arranged in the shell and connected thereto. The air inlet in the pump body (2) is provided with an air suction pipe connected thereto and extending out of the shell. The air outlet in the pump body (2) is provided with a connecting pipe connected thereto and connecting the air outlet to the detection unit. The shell is provided with a connecting port on its upper end face located at the cavity, which connects the cavity to the outside and forms a diffusion detection.

2. The portable gas detector for pumping and diffusion according to claim 1 is characterized in that: The shell is formed by splicing and assembling an upper shell (3) and a lower shell (4), and the shell is provided with a filter plate (5) connected to the communication port and used to reduce the entry of impurities therein.

3. The portable gas detector for pumping and diffusion according to claim 1 is characterized in that: The detection unit is composed of a plurality of detection chambers (6) with detection cavities and a plurality of sensors, the number of which is the same as that of the detection chambers (6) and which are arranged in the corresponding detection chambers (6) and used for detecting gas. The upper ends of the plurality of detection chambers (6) are connected to the inner wall of the upper shell (3). The upper end surface of the upper shell (3) located at the detection cavity is provided with an axially recessed recessed groove. The upper shell (3) is provided with a through hole groove connected to the detection cavity on the bottom surface of the groove at the corresponding detection chamber (6). The upper shell (3) is provided with a plurality of axially inwardly recessed recessed grooves (7) on the bottom surface of the groove for connecting the detection chamber (6). A plurality of the recessed grooves (7) are grouped into a plurality of detection structures. A through hole penetrating the upper shell is provided on the bottom surface of the recessed grooves (7) in the above-mentioned detection structure. The inner end surface of the upper shell located at the through hole is provided with an annular protrusion (8) protruding axially outward and connected to the connecting pipe.

4. The portable gas detector for pumping and diffusion according to claim 1 is characterized in that: The upper shell (3) is provided with a sealing unit connected to the recessed groove and used to seal the recessed groove, and the sealing unit is composed of a lower pressure plate (9), a middle pressure plate (10) and an upper pressure plate (11). The lower pressure plate (9) is provided on the bottom surface of the groove and connected thereto, the middle pressure plate (10) is provided on the lower pressure plate (9) and connected thereto, and the upper pressure plate (11) is provided on the middle pressure plate (10) and connected thereto. Both sides of the upper pressure plate (11) are provided with locking buckles (12) connected thereto and cooperating with the lower shell (4) to form a snap-fit structure.

5. The portable gas detector for pumping and diffusion according to claim 1 is characterized in that: The end faces of the middle pressure plate (10) and the lower pressure plate (9) that are in contact with each other are provided with a plurality of protrusions (13) that protrude axially downward and leave a distance between the middle pressure plate (10) and the lower pressure plate (9); the lower end face of the middle pressure plate (10) is provided with a plurality of annular protrusions (14) that protrude axially outward and penetrate the lower pressure plate (9) and extend into the upper shell (3); the inner peripheral wall of the upper shell (3) at the annular protrusions (14) is provided with an annular conflicting portion (15) that protrudes axially outward and conflicts with the annular protrusions (14); the annular protrusions (14) and the annular conflicting portion (15) are coaxially arranged; the lower pressure plate (9) is provided with a through groove portion on the end face at the corresponding through hole groove.

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