CN216978821U

CN216978821U - Ultraviolet lamp assembly and gas sensor

Info

Publication number: CN216978821U
Application number: CN202122789822.0U
Authority: CN
Inventors: 苏爱民; 陈冰
Original assignee: Shanghai Genkuai Technology Co ltd
Current assignee: Shanghai Genkuai Technology Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-07-15
Anticipated expiration: 2031-11-15

Abstract

The utility model provides an ultraviolet lamp assembly and a gas sensor. The ultraviolet lamp assembly comprises a lamp holder, an ultraviolet lamp and a sealing ring, wherein the lamp holder comprises a columnar extension part and a packaging plane connected with the end part of the columnar extension part, the radial size of the packaging plane is larger than that of the columnar extension part, accommodating holes are formed in the packaging plane and the columnar extension part, the ultraviolet lamp comprises a lamp tube and an output window platform connected with the end part of the lamp tube, and the radial size of the output window platform is larger than that of the lamp tube; the lamp tube is arranged in the accommodating hole of the lamp holder, the output window platform is erected on the lamp holder, and the sealing ring is sleeved on the circumference of the lamp tube and is positioned between the packaging plane and the output window platform. The utility model is beneficial to improving the sealing performance of the ultraviolet lamp assembly and the performance of the ultraviolet lamp assembly, and the installation and the use of the ultraviolet lamp are simpler and more convenient.

Description

Ultraviolet lamp assembly and gas sensor

Technical Field

The utility model relates to the technical field of sensors, in particular to an ultraviolet lamp assembly and a gas sensor.

Background

The core components of gas sensors such as PID sensors include an ultraviolet lamp, a lamp holder and a signal detector. The ultraviolet lamp is fixed on the lamp holder and electrically connected with a plurality of ultraviolet lamp driving electrodes arranged in the lamp holder, and can excite the gas in the ultraviolet lamp to emit high-energy ultraviolet rays under the condition of applying high voltage to the driving electrodes. The high-energy ultraviolet rays interact with the detected gas in the signal detector, the detected gas is ionized into positive ions and electrons and is collected and converted into a current signal by the signal detector, the magnitude of the current is in direct proportion to the concentration of the detected gas, and the current signal is amplified by a circuit and finally converted into a reading for display, so that the detection of the gas concentration is realized. According to the principle, whether the light energy output by the ultraviolet lamp is stable or not is directly related to the sensitivity, the precision and the stability of the sensor. If the sealing performance between the lamp holder and the ultraviolet lamp tube is poor, when high-temperature and high-humidity gas enters the position near the driving electrode on the side wall of the lamp tube, the surface of the electrode can be corroded, the output UV light energy of the ultraviolet lamp is reduced, and the sensitivity of the sensor is influenced, so that the effect of ensuring the sealing of the lamp holder hole and the outside is very important for ensuring the stability of the sensor.

In the prior art, an output window of an ultraviolet lamp is substantially consistent with the outer diameter of the ultraviolet lamp tube, and the ultraviolet lamp tube is placed in a lamp holder hole and then sealed by a sealing ring which is sleeved on the outer wall of the ultraviolet lamp tube and is positioned in the lamp holder hole, namely the sealing ring is positioned between the inner wall of the lamp holder hole and the outer wall of the ultraviolet lamp tube and belongs to radial sealing. Such a sealing method has problems such as the following:

firstly, the outer diameter of the glass lamp tube has larger size tolerance due to the process, so that the gap between the outer wall of the lamp tube and the side wall of the lamp holder hole is not a fixed value, the extrusion amount of the sealing ring can be changed along with the difference of the gap, and the reliability of the radial sealing mode is not high enough.

Secondly, the lamp holder hole which is sealed in the radial direction is adopted, when the ultraviolet lamp is replaced, the ultraviolet lamp is not easy to take out due to the friction resistance of the sealing ring, and related tools such as tweezers are needed, so that the operation is inconvenient, the edge of an output window of the ultraviolet lamp is easy to damage, and the damage to the ultraviolet lamp is caused.

Disclosure of Invention

In view of the above disadvantages of the prior art, an object of the present invention is to provide an ultraviolet lamp assembly and a gas sensor, which are used to solve the problems that the existing gas sensor adopts a radial sealing manner in which a sealing ring is sealed between the sidewall of a lamp holder hole and a glass lamp tube, the sealing reliability is not high due to the large dimensional tolerance of the glass lamp tube, and the ultraviolet lamp tube is easily damaged due to the inconvenience of taking and placing during the process of taking and placing the ultraviolet lamp.

In order to achieve the above and other related objects, the present invention provides an ultraviolet lamp assembly, including a lamp socket, an ultraviolet lamp and a sealing ring, where the lamp socket includes a cylindrical extension portion and a packaging plane connected to an end of the cylindrical extension portion, a radial dimension of the packaging plane is greater than a radial dimension of the cylindrical extension portion, and a receiving hole is formed in the packaging plane and the cylindrical extension portion, the ultraviolet lamp includes a lamp tube and an output window platform connected to an end of the lamp tube, and a radial dimension of the output window platform is greater than a radial dimension of the lamp tube; the lamp tube is arranged in the accommodating hole of the lamp holder, the output window platform is erected on the lamp holder, and the sealing ring is sleeved on the circumference of the lamp tube and is positioned between the packaging plane and the output window platform.

Optionally, the tube comprises a lead-free glass tube.

Optionally, the lamp holder comprises a plastic socket.

Optionally, the sealing ring comprises an elastic rubber ring.

Optionally, a radial dimension of the envelope plane of the lamp holder is larger than a radial dimension of the output window platform.

Optionally, the receiving aperture of the lamp base, the ultraviolet lamp and the sealing ring are coaxial.

Optionally, a groove is formed in a position of the packaging plane and/or the output window platform corresponding to the sealing ring, and the depth of the groove is smaller than the thickness of the sealing ring.

Optionally, the output window platform comprises a platform of a crystal material.

The utility model also provides a gas sensor comprising an ultraviolet lamp assembly as described in any of the above aspects.

Optionally, the gas sensor comprises any one of a PID sensor and a gas chromatography sensor.

As described above, the ultraviolet lamp assembly and the gas sensor according to the present invention have the following advantageous effects: according to the ultraviolet lamp assembly, the lamp tube is in clearance fit with the accommodating hole, and the lamp tube can slide in the accommodating hole, so that a special tool is not required for mounting and taking out the ultraviolet lamp; the accommodating hole, the sealing ring and the ultraviolet lamp of the lamp holder are axially sealed, reasonable deformation of the sealing ring can be reserved in design, the inner wall space of the accommodating hole is sealed and isolated from the outside through extrusion of the ultraviolet lamp output window platform and the sealing ring and extrusion of the upper surface of the accommodating hole and the sealing ring, and the elasticity of the sealing ring is utilized, so that the output window platform of the ultraviolet lamp is in closer contact with other related parts, and the fixation between the ultraviolet lamp and the lamp holder is facilitated. When the ultraviolet lamp assembly provided by the utility model is applied to gas sensors such as PID sensors, other related components (such as a signal detector) of the sensor only need to be fixed above an output window platform of the ultraviolet lamp, a sealing ring is tightly pressed, the sealing effect of the accommodating hole is achieved, the use is very convenient, the sealing reliability of the sensor is improved, and the detection precision and the service life of the sensor are further improved.

Drawings

Fig. 1 shows an exemplary structure of an ultraviolet lamp assembly provided in the present invention.

Fig. 2 is a schematic cross-sectional view of fig. 1.

Fig. 3 is an exploded view of fig. 1.

Description of the element reference numerals

1 Lamp holder

11 receiving hole

12 plane of encapsulation

13 columnar extension part

2 ultraviolet lamp

21 lamp tube

22 output window platform

3 sealing ring

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. As in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structures are not partially enlarged in general scale for convenience of illustration, and the schematic views are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

For convenience in description, spatial relational terms such as "below," "beneath," "below," "under," "over," "upper," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. In addition, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

In the context of this application, a structure described as having a first feature "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed in between the first and second features, such that the first and second features may not be in direct contact.

It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated. In order to keep the drawings as concise as possible, not all features of a single figure may be labeled in their entirety.

As shown in fig. 1-3, the present invention provides a uv lamp assembly, which comprises a lamp holder 1, a uv lamp 2 and a sealing ring 3, wherein the lamp holder 1 comprises a cylindrical extension portion 13 and a sealing plane 12 connected to an end of the cylindrical extension portion 13, or the sealing plane 12 is located at one end of the cylindrical extension portion 13 and is generally integrally connected to the cylindrical extension portion, a radial dimension of the sealing plane 12 is greater than a radial dimension of the cylindrical extension portion 13 (a planar structure of the two is generally circular, and thus the radial dimension refers to a respective diameter), so that the sealing plane has an outer edge surface extending radially outward (i.e. away from a center of the cylindrical extension portion 13) relative to the cylindrical extension portion 13, and receiving holes 11 are formed in the sealing plane 12 and the cylindrical extension portion 13, the receiving holes 11 are mismatched in shape with the lamp tubes 21, but the diameter of the receiving holes 11 is generally greater than the diameter of the lamp tubes 21, the ultraviolet lamp 2 includes a lamp tube 21 and an output window platform 22 connected to an end of the lamp tube 21, or the output window platform 22 is connected to one end of the lamp tube 21, and the two are usually integrally connected, the radial dimension of the output window platform 22 is greater than the radial dimension of the lamp tube 21, so that the output window platform 22 has an outer edge surface extending radially outward (i.e., extending in a direction away from the center of the lamp tube 21) relative to the lamp tube 21, the output window platform 22 is usually a platform made of a crystalline material, for example, a window platform made of magnesium fluoride, and ultraviolet light emitted by the ultraviolet lamp 2 is emitted through the output window platform 22; the lamp tube 21 is disposed in the accommodating hole 11 of the lamp holder 1, the output window platform 22 is erected on the lamp holder 1 through the outer edge surface thereof, and the sealing ring 3 is sleeved on the circumference of the lamp tube 21 and is located between the packaging plane 12 and the output window platform 22. The ultraviolet lamp assembly is mounted in a manner that the sealing ring 3 is sleeved on the outer side of the lamp tube 21 and close to one side of the output window platform 22, then the combined body is placed into the accommodating hole 11 of the lamp holder 1, the sealing ring 3 is positioned between the outer edge surface of the packaging plane 12 above the accommodating hole 11 and the outer edge surface of the output window platform 22 of the ultraviolet lamp 2, and the whole ultraviolet lamp assembly is sealed and fixed through pressing. According to the ultraviolet lamp assembly provided by the utility model, the lamp tube is in clearance fit with the accommodating hole, and the lamp tube can slide in the accommodating hole, so that a special tool is not required for installing and taking out the ultraviolet lamp; the containing hole, the sealing ring and the ultraviolet lamp of lamp stand are axial seal, can reserve reasonable sealing washer deflection in the design, through the extrusion of ultraviolet lamp output window platform and sealing washer and the extrusion of containing hole upper surface and sealing washer, make the containing hole inner wall space seal the isolation with the external world, and utilize the elasticity of sealing washer for the output window platform of ultraviolet lamp is inseparabler with the contact of other relevant parts, is favorable to the fixing between ultraviolet lamp and the lamp stand. When the ultraviolet lamp assembly provided by the utility model is applied to gas sensors such as a PID sensor, other related components (such as a signal detector) of the sensor are only required to be fixed above an output window platform of the ultraviolet lamp, and the sealing ring is compressed, so that the sealing effect of the accommodating hole can be achieved, the ultraviolet lamp assembly is very convenient to use, the sealing reliability of the sensor is improved, and the detection precision and the service life of the sensor are further improved.

The lamp tube 21 is preferably a glass tube, and in a preferred example, the lamp tube 21 is preferably a lead-free glass tube, which helps to improve the performance and prolong the service life of the ultraviolet lamp. In one example, the lamp socket 1 is preferably, but not limited to, a plastic socket, which not only facilitates the fixing of the lamp tube 21, but also facilitates the insulation, and can be processed into a desired shape as required. The sealing ring 3 is preferably but not limited to an elastic rubber ring, such as a fluorine-containing rubber ring, an ethylene propylene diene monomer sealing ring and the like, has the performances of corrosion resistance, low adsorption and the like, and is beneficial to prolonging the service life of the sealing ring 3 and improving the durability of the ultraviolet lamp assembly.

In one example, the radial dimension of the envelope plane 12 of the lamp holder 1 is larger than the radial dimension of the output window platform 22, which facilitates assembly of the uv lamp assembly with other external structures, such as with a signal detector.

The receiving hole 11 of the lamp holder 1, the ultraviolet lamp 2 and the sealing ring 3 are preferably coaxial, but the lamp holder 1 and the receiving hole 11 are not necessarily coaxial, which helps to improve the utilization rate of the inner space of the sensor and reduce the external dimension of the sensor.

In an example, the position of the sealing plane 12 and/or the output window platform 22 corresponding to the sealing ring 3 is provided with a groove, the depth of the groove is less than the thickness of the sealing ring 3, the groove can play a role in positioning and fixing, and when the sealing ring 3 is installed, the groove can be partially embedded in the groove, which is beneficial to improving the sealing performance of the ultraviolet lamp assembly.

The uv lamp assembly typically further includes a driving electrode, etc., which is, for example, fitted over the lamp tube 21 and also sealed in the accommodation hole 11, and is connected to an external circuit through a lead wire at the bottom of the accommodation hole 11. To facilitate connection to external structures, the end of the lamp holder 1 facing away from the output window platform 22 may be provided with a conical structure.

The utility model also provides a gas sensor comprising an ultraviolet lamp assembly as described in any of the above aspects. For further description of the ultraviolet lamp assembly, reference is made to the foregoing description, which is not repeated for the sake of brevity. The gas sensor includes, but is not limited to, any one of a PID sensor and a gas chromatography sensor. The gas sensor generally includes, in addition to the ultraviolet lamp assembly, a signal detector fixed to the ultraviolet lamp assembly in a direction from a light incident hole toward an output window platform of the ultraviolet lamp, and a detection circuit electrically connected to an electrode in the signal detector. Since this part is not the core invention of the present solution, it is not expanded in detail.

In summary, the present invention provides an ultraviolet lamp assembly and a gas sensor. The ultraviolet lamp assembly comprises a lamp holder, an ultraviolet lamp and a sealing ring, wherein the lamp holder comprises a columnar extension part and a packaging plane connected with the end part of the columnar extension part, the radial size of the packaging plane is larger than that of the columnar extension part, accommodating holes are formed in the packaging plane and the columnar extension part, the ultraviolet lamp comprises a lamp tube and an output window platform connected with the end part of the lamp tube, and the radial size of the output window platform is larger than that of the lamp tube; the lamp tube is arranged in the accommodating hole of the lamp holder, the output window platform is erected on the lamp holder, and the sealing ring is sleeved on the circumference of the lamp tube and is positioned between the packaging plane and the output window platform. The utility model is beneficial to improving the sealing performance of the ultraviolet lamp assembly and the performance of the ultraviolet lamp assembly, and the installation and the use of the ultraviolet lamp are simpler and more convenient. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An ultraviolet lamp assembly is characterized by comprising a lamp holder, an ultraviolet lamp and a sealing ring, wherein the lamp holder comprises a cylindrical extension part and a packaging plane connected with the end part of the cylindrical extension part, the radial size of the packaging plane is larger than that of the cylindrical extension part, accommodating holes are formed in the packaging plane and the cylindrical extension part, the ultraviolet lamp comprises a lamp tube and an output window platform connected with the end part of the lamp tube, and the radial size of the output window platform is larger than that of the lamp tube; the lamp tube is arranged in the accommodating hole of the lamp holder, the output window platform is erected on the lamp holder, and the sealing ring is sleeved on the circumference of the lamp tube and is positioned between the packaging plane and the output window platform.

2. The ultraviolet lamp assembly of claim 1, wherein the lamp tube comprises a lead-free glass lamp tube.

3. The ultraviolet lamp assembly of claim 1, wherein the lamp base comprises a plastic base.

4. The ultraviolet lamp assembly of claim 1, wherein the sealing ring comprises an elastomeric rubber ring.

5. The ultraviolet lamp assembly of claim 1, wherein a radial dimension of an envelope plane of the lamp base is greater than a radial dimension of the output window platform.

6. The uv lamp assembly according to claim 1, wherein the receiving aperture of the lamp base, the uv lamp and the sealing ring are concentric.

7. The uv lamp assembly according to claim 1, wherein the encapsulation plane and/or the output window platform are provided with a groove at a position corresponding to the sealing ring, and wherein the groove depth is less than the thickness of the sealing ring.

8. The ultraviolet lamp assembly of claim 1, wherein the output window platform comprises a platform of a crystalline material.

9. A gas sensor comprising an ultraviolet lamp assembly according to any one of claims 1 to 8.

10. The gas sensor according to claim 9, wherein the gas sensor comprises any one of a PID sensor and a gas chromatography sensor.