A protective structure for a gas sensor

Abstract

The utility model discloses a protective structure of gas sensor in the technical field of protective structure, a protective structure of gas sensor. The utility model has the advantages that: the utility model embodiment is equipped with fixed mechanism, and after sensor is installed in the mounting groove of bottom plate through bolt, will the protective shell and make its lower end extrude sealing washer and be connected in the mounting groove, under the action of spring, and the clamping strip inserts the mounting groove and is inserted in the clamping groove, and then realizes the sealed connection of protective shell and bottom plate, and can make the clamping strip separate the clamping groove through the operation of simple convenience, and the protective shell needs to be disassembled, and the operation is simple and convenient. The protective shell is connected with a plurality of first connecting rings and second connecting rings, and the air permeability in the protective shell can be maintained.

Description

Technical Field

[0001] This utility model relates to the field of protective structure technology, specifically to a protective structure for a gas sensor. Background Technology

[0002] Gas sensors are widely used in environmental monitoring, industrial safety, smart homes and other fields, and are often exposed to harsh environments such as dust.

[0003] Existing protective structures mostly use bolt-fixed sealed shells, which can provide basic protection, but have the following drawbacks:

[0004] 1. Cumbersome disassembly and assembly: Multiple bolts need to be removed when repairing or replacing sensors, which is inefficient.

[0005] 2. Insufficient sealing reliability: After long-term use, the bolts are prone to loosening, resulting in uneven tightening force of the sealing ring, and dust can easily seep in from the gaps.

[0006] 3. High maintenance costs: The filter screen is usually molded as one piece with the housing. When it becomes clogged, the entire housing needs to be replaced, which increases the cost of use. Utility Model Content

[0007] The technical problem this invention aims to solve is that the protective structures of sensors in the prior art are mostly fixed structures, which are inconvenient to disassemble and maintain.

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] A protective structure for a gas sensor includes a base plate for mounting the sensor, a protective shell, and a fixing mechanism. The protective shell is fastened to the upper end of the base plate, and two fixing mechanisms are symmetrically arranged inside the base plate.

[0010] The fixing mechanism includes a sliding plate, a sliding rod, and a spring. The two ends of the sliding plate are slidably connected to the two sliding rods respectively. The spring is sleeved on the sliding rod and fixed to the rear end of the sliding plate. A retaining strip is fixed to the front end of the sliding plate. The retaining strip has a right-angled trapezoidal cross section. The lower ends of both sides of the protective shell are provided with symmetrically distributed retaining grooves, and the retaining strip is inserted into the retaining grooves.

[0011] Furthermore, the base plate is provided with a mounting groove, the bottom surface of which is fitted with a sealing ring, and the lower end of the protective shell is provided with an open structure, the lower end of which is inserted into the mounting groove and abuts against the sealing ring.

[0012] Furthermore, the base plate is provided with symmetrically distributed sliding grooves on both sides of the mounting groove. One side of the sliding groove is connected to the mounting groove. The sliding plate is horizontally slidably engaged in the sliding groove. Limiting grooves are provided on both sides of the sliding groove and are connected thereto. The sliding rod is horizontally fixed in the limiting groove. Both ends of the sliding plate are slidably engaged in the limiting groove. The rear end of the spring is fixed to the inner wall of the limiting groove.

[0013] Furthermore, the bottom surface of the slide plate is provided with a groove, and a connecting plate that is horizontally slidably disposed in the groove is fixedly connected to the lower end of the slide plate. A pull rod that extends out of the outer side of the bottom plate is fixedly connected to the rear end of the connecting plate.

[0014] Furthermore, the upper end of the protective shell is provided with a plurality of first connecting grooves, the bottom surface of the first connecting groove is provided with a first vent that penetrates the inner wall of the protective shell, a first connecting ring is threadedly connected in the first connecting groove, a first sealing ring is fixedly connected to the lower end of the first connecting ring and abuts against the bottom surface of the first connecting groove, and a first filter screen is adhered to the top of the inner wall of the first connecting ring.

[0015] Furthermore, the protective shell has several second connecting grooves on its front and rear sides. The bottom surface of the second connecting groove has a second vent that penetrates the inner wall of the protective shell. A second connecting ring is threaded into the second connecting groove. A second sealing ring that abuts against the bottom surface of the second connecting groove is fixed to the lower end of the second connecting ring. A second filter screen is adhered to the top of the inner wall of the second connecting ring.

[0016] The beneficial effects of this utility model by adopting the above structure are as follows:

[0017] In this embodiment of the utility model, a fixing mechanism is provided. After the sensor is installed in the mounting groove of the base plate by bolts, the protective shell is fastened into the mounting groove and its lower end is pressed against the sealing ring. Under the action of the spring, the locking strip extends into the mounting groove and is inserted into the locking slot, thereby realizing the sealed connection between the protective shell and the base plate. To remove the protective shell, the locking strip can be disengaged by pulling the lever. The operation is simple and convenient.

[0018] In this embodiment of the invention, the protective shell is connected with a plurality of first connecting rings and second connecting rings, thereby maintaining the air permeability inside the protective shell. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the entire machine of this utility model.

[0020] Figure 2 This is an exploded view of the present invention.

[0021] Figure 3 This is a cross-sectional view of the protective shell of this utility model. Figure 1 .

[0022] Figure 4 This is a cross-sectional view of the protective shell of this utility model. Figure 2 .

[0023] Figure 5 Cross-sectional view of the base plate of this utility model Figure 1 .

[0024] Figure 6Cross-sectional view of the base plate of this utility model Figure 2 .

[0025] Figure 7 This is a schematic diagram of the fixing mechanism of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Base plate, 101. Mounting groove, 102. Sealing ring, 103. Slide groove, 104. Groove, 105. Limiting groove, 2. Fixing mechanism, 201. Slide plate, 202. Locking strip, 203. Connecting plate, 204. Pull rod, 205. Slide rod, 206. Spring, 3. Protective shell, 301. Locking groove, 302. First connecting groove, 303. First vent, 304. Second connecting groove, 305. Second vent, 4. First connecting ring, 401. First sealing ring, 402. First filter screen, 5. Second connecting ring, 501. Second sealing ring, 502. Second filter screen. Detailed Implementation

[0028] like Figure 1-7 As shown, a protective structure for a gas sensor includes a base plate 1 for mounting the sensor, a protective shell 3, and a fixing mechanism 2. The protective shell 3 is fastened to the upper end of the base plate 1, and two fixing mechanisms 2 are symmetrically arranged inside the base plate 1. The base plate 1 has a mounting groove 101, and a sealing ring 102 is fitted into the bottom surface of the mounting groove 101. The lower end of the protective shell 3 is an open structure, and the lower end of the protective shell 3 is inserted into the mounting groove 101 and abuts against the sealing ring 102, thereby achieving a sealed connection of the protective shell 3 in the mounting groove 101 through the sealing ring 102.

[0029] like Figure 4-7As shown, the fixing mechanism 2 includes a sliding plate 201, a sliding rod 205, and a spring 206. The two ends of the sliding plate 201 are slidably connected to two sliding rods 205 respectively. The spring 206 is sleeved on the sliding rods 205 and fixed to the rear end of the sliding plate 201. A retaining strip 202 is fixedly connected to the front end of the sliding plate 201. The retaining strip 202 has a right-angled trapezoidal cross-section. Symmetrically distributed retaining grooves 301 are provided on the lower ends of both sides of the protective shell 3. The retaining strip 202 is inserted into the retaining grooves 301. The base plate 1 has symmetrically distributed sliding grooves 103 on both sides of the mounting groove 101. One side of the sliding groove 103 communicates with the mounting groove 101. The sliding plate 201 slides horizontally within the sliding groove 103. Limiting grooves 105 communicating with the sliding groove 103 are provided on both sides of the sliding groove 103. The sliding rod 205 is horizontally fixed within the limiting groove 105. The two ends of the sliding plate 201... The end of the spring 206 is fixedly connected to the inner wall of the limiting groove 105. The bottom surface of the sliding plate 201 has a groove 104. The lower end of the sliding plate 201 is fixedly connected to a connecting plate 203 that is horizontally slidably disposed in the groove 104. The rear end of the connecting plate 203 is fixedly connected to a pull rod 204 that extends out of the outer side of the base plate 1. After the protective shell 3 is inserted into the mounting groove 101, the outer walls on both sides of the protective shell 3 press against the inclined surface of the retaining strip 202, thereby causing the retaining strip 202 to retract into the sliding groove 103. When the protective shell 3 abuts against and is pressed against the sealing ring 102, under the action of the spring 206, the retaining strip 202 extends into the mounting groove 101 and is inserted into the retaining groove 301, thereby fixing the protective shell 3 on the base plate 1. When disassembly is required, pull the pull rod 204 to disengage the retaining strip 202 from the retaining groove 301 and remove the protective shell 3 from the mounting groove 101.

[0030] like Figure 2-4 As shown, the upper end of the protective shell 3 is provided with several first connecting grooves 302, and the bottom surface of the first connecting grooves 302 is provided with a first vent 303 penetrating the inner wall of the protective shell 3. A first connecting ring 4 is threaded into the first connecting groove 302, and a first sealing ring 401 is fixedly connected to the lower end of the first connecting ring 4, abutting against the bottom surface of the first connecting groove 302. A first filter screen 402 is adhered to the top of the inner wall of the first connecting ring 4. Several second connecting grooves 304 are provided on the front and rear sides of the protective shell 3, and the bottom surface of the second connecting grooves 304 is provided with a second vent 303 penetrating the inner wall of the protective shell 3. 5. A second connecting ring 5 is threaded into the second connecting groove 304. A second sealing ring 501 is fixed to the lower end of the second connecting ring 5, which abuts against the bottom surface of the second connecting groove 304. A second filter screen 502 is adhered to the top of the inner wall of the second connecting ring 5. The airflow between the inside and outside of the protective shell 3 is achieved by sealing the first connecting ring 4 and the second connecting ring 5 on the protective shell 3. The dust is filtered by setting the first filter screen 402 and the second filter screen 502 on the first connecting ring 4 and the second connecting ring 5. The first connecting ring 4 and the second connecting ring 5 can be disassembled to facilitate cleaning or replacement of the filter screen.

[0031] In use, the sensor is bolted into the mounting groove 101 on the base plate 1. The base plate 1 has a wire hole (not shown) for the sensor cable to pass through. After the cable passes through, it needs to be sealed with sealant to ensure the sealing of the bottom of the mounting groove 101. The protective shell 3 is inserted into the mounting groove 101. As the protective shell 3 is inserted, the outer walls on both sides of the protective shell 3 press against the inclined surfaces of the retaining strips 202 in the two fixing mechanisms 2, causing the retaining strips 202 to retract into the sliding groove 103. When the lower end of the protective shell 3 abuts against and presses against the sealing ring 102, the retaining groove 301 is at a position parallel to the retaining strip 202. Under the action of spring 206, slide plate 201 slides on slide rod 205, thereby driving the locking strip 202 to extend into mounting groove 101 and insert into locking groove 301, thus the protective shell 3 can be installed and fixed on base plate 1 by the two locking strips 202; air circulates inside and outside the protective shell 3 through the first vent 303 and the second vent 305 on the protective shell 3, and the first filter 402 and the second filter 502 on the first connecting ring 4 and the second connecting ring 5 filter the circulating air. When the filter needs to be cleaned or replaced, the corresponding first connecting ring 4 or second connecting ring 5 can be disassembled, which is simple and convenient to operate;

[0032] When disassembly is required, pull the lever 204 outward, which causes the connecting plate 203 to slide in the groove 104, thereby pulling the slide plate 201 to slide in the slide groove 103, which in turn causes the locking strip 202 to be pulled out of the locking groove 301 and retracted into the slide groove 103. Then the protective shell 3 can be removed from the mounting groove 101 to achieve disassembly.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A protective structure for a gas sensor, comprising a base plate (1) for mounting the sensor, characterized in that: It also includes a protective shell (3) and a fixing mechanism (2). The protective shell (3) is fastened to the upper end of the base plate (1), and the two fixing mechanisms (2) are symmetrically arranged inside the base plate (1). The fixing mechanism (2) includes a sliding plate (201), a sliding rod (205) and a spring (206). The two ends of the sliding plate (201) are slidably connected to the two sliding rods (205). The spring (206) is sleeved on the sliding rod (205) and fixed to the rear end of the sliding plate (201). A retaining strip (202) is fixed to the front end of the sliding plate (201). The cross section of the retaining strip (202) is set as a right trapezoid. The lower ends of both sides of the protective shell (3) are provided with symmetrically distributed retaining grooves (301). The retaining strip (202) is inserted into the retaining groove (301).

2. The protective structure for a gas sensor according to claim 1, characterized in that: The base plate (1) is provided with an installation groove (101), and a sealing ring (102) is fitted into the bottom surface of the installation groove (101). The lower end of the protective shell (3) is provided with an open structure, and the lower end of the protective shell (3) is inserted into the installation groove (101) and abuts against the sealing ring (102).

3. The protective structure for a gas sensor according to claim 2, characterized in that: The base plate (1) is provided with sliding grooves (103) symmetrically distributed on both sides of the mounting groove (101). One side of the sliding groove (103) is connected to the mounting groove (101). The sliding plate (201) is horizontally slidably fitted in the sliding groove (103). Limiting grooves (105) are provided on both sides of the sliding groove (103) and are connected to it. The sliding rod (205) is horizontally fixed in the limiting groove (105). Both ends of the sliding plate (201) are slidably fitted in the limiting groove (105). The rear end of the spring (206) is fixed to the inner wall of the limiting groove (105).

4. The protective structure for a gas sensor according to claim 3, characterized in that: The bottom surface of the slide plate (201) is provided with a groove (104), and a connecting plate (203) is fixedly connected to the lower end of the slide plate (201) and is horizontally slidably disposed in the groove (104). A pull rod (204) extending out of the outer side of the bottom plate (1) is fixedly connected to the rear end of the connecting plate (203).

5. The protective structure for a gas sensor according to claim 1 or 2, characterized in that: The upper end of the protective shell (3) is provided with a plurality of first connecting grooves (302), the bottom surface of the first connecting groove (302) is provided with a first vent (303) penetrating the inner wall of the protective shell (3), a first connecting ring (4) is threadedly connected in the first connecting groove (302), a first sealing ring (401) is fixedly connected to the lower end of the first connecting ring (4) and a first filter screen (402) is adhered to the top of the inner wall of the first connecting ring (4).

6. The protective structure for a gas sensor according to claim 5, characterized in that: The protective shell (3) has several second connecting grooves (304) on its front and rear sides. The bottom surface of the second connecting groove (304) has a second vent (305) that penetrates the inner wall of the protective shell (3). A second connecting ring (5) is threaded into the second connecting groove (304). A second sealing ring (501) that abuts against the bottom surface of the second connecting groove (304) is fixed to the lower end of the second connecting ring (5). A second filter screen (502) is adhered to the top of the inner wall of the second connecting ring (5).

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