阅读说明：本技术 一种光电倍增管用密封防水器 (Sealing waterproof device for photomultiplier ) 是由 闫琪明 周致遥 田子亦 于 2021-05-21 设计创作，主要内容包括：本发明一种光电倍增管用密封防水器公开了一种通过上封帽和下封帽对挤压锥面的挤压,形成第一层防水密封结构,通过膨胀密封段的鼓胀对光电倍增管和其上的线缆进行包裹,形成第二层防水密封结构,通过主密封管内部的灌封胶体形成第三层防水密封结构,三层防水密封结构对光电倍增管和线缆线路板连接处进行防水密封的密封防水器,其特征在于主密封管为一端敞口的管状结构,上挤压气环置于主密封管的一端口部,上挤压气环的纵截面为倒L型,上挤压气环的内部形成气腔,上挤压气环的一端形成弹性波纹段,上挤压气环的另一端形成膨胀密封段,上封帽套置于主密封管的一端上,且和上挤压气环的顶部相接触,多个上密封环体环置于上挤压气环的顶部。(The invention discloses a sealed waterproof device for a photomultiplier, which forms a first layer of waterproof sealing structure by extruding an extrusion conical surface through an upper sealing cap and a lower sealing cap, wraps the photomultiplier and a cable on the photomultiplier by the expansion of an expansion sealing section to form a second layer of waterproof sealing structure, forms a third layer of waterproof sealing structure by pouring sealant in a main sealing tube, and forms a sealed waterproof device for waterproof sealing at the connection part of the photomultiplier and a cable circuit board by the three layers of waterproof sealing structures, and is characterized in that the main sealing tube is of a tubular structure with an open end, an upper extrusion gas ring is arranged at one end opening part of the main sealing tube, the longitudinal section of the upper extrusion gas ring is inverted L-shaped, an air cavity is formed inside the upper extrusion gas ring, an elastic corrugated section is formed at one end of the upper extrusion gas ring, an expansion sealing section is formed at the other end of the upper extrusion gas ring, the upper sealing cap is sleeved on one end of the main sealing tube, and contacts with the top of the upper extrusion gas ring, and a plurality of upper sealing ring rings are arranged on the top of the upper extrusion gas ring.)

1. The utility model provides a photomultiplier is with sealed water-proof device which characterized by: the main sealing pipe is of a tubular structure with an open end, an upper extrusion gas ring is arranged at one end opening of the main sealing pipe, the longitudinal section of the upper extrusion gas ring is of an inverted L shape, an air cavity is formed inside the upper extrusion gas ring, an elastic corrugated section is formed at one end of the upper extrusion gas ring, an expansion sealing section is formed at the other end of the upper extrusion gas ring, an upper sealing cap is sleeved on one end of the main sealing pipe and is contacted with the top of the upper extrusion gas ring, a plurality of upper sealing ring bodies are arranged at the top of the upper extrusion gas ring, the upper sealing ring bodies are of a conical structure, the inner walls of the upper sealing ring bodies and the upper sealing cap are attached, an attaching surface between the upper sealing ring bodies and the upper sealing cap forms an extrusion conical surface, a limiting ring is arranged inside the main sealing pipe, a pouring sealant is arranged inside the main sealing pipe and is positioned between the limiting ring and the other end of the main sealing pipe, the pouring sealant and the limiting ring are matched to form a cavity, and a communicating groove is formed in the middle part of the pouring sealant, the pipe connecting sleeve is arranged at the other end of the main sealing pipe and is communicated with the cavity through a communicating groove, the lower extrusion gas ring is arranged at the opening of the pipe connecting sleeve, an air cavity is formed inside the lower extrusion gas ring, one end of the lower extrusion gas ring forms an elastic corrugated section, the other end of the lower extrusion gas ring forms an expansion sealing section, the inner walls of the expansion sealing sections of the upper extrusion gas ring and the lower extrusion gas ring are provided with corrugated grooves, the lower sealing cap is sleeved on the pipe connecting sleeve and is contacted with the bottom of the lower extrusion gas ring, a plurality of lower sealing ring rings are arranged at the bottom of the lower extrusion gas ring, the lower sealing ring is of a conical structure, the lower sealing ring is attached to the inner wall of the lower sealing cap, the attaching surface between the lower sealing ring and the lower sealing cap forms an extrusion conical surface, the elastic corrugated section is provided with a corrugated plate, the upper sealing ring is provided with a plurality of guide strips at equal angles, and the upper sealing cap is provided with a plurality of guide grooves at equal angles, a plurality of guide strips are arranged on the lower sealing ring body at equal angles, and a plurality of guide grooves are arranged on the lower sealing cap at equal angles.

2. The sealing waterproof device for the photomultiplier according to claim 1, wherein the upper sealing ring body is matched with the upper sealing cap, the lower sealing ring body is matched with the lower sealing cap, the upper sealing cap and the lower sealing cap extrude the upper sealing ring body and the lower sealing ring body through the extrusion taper, so that the plurality of upper sealing rings are extruded to shrink to wrap and seal the photomultiplier, and the plurality of lower sealing rings are extruded to shrink to wrap and seal the cable, thereby forming a first waterproof layer.

3. The sealing waterproof device for the photomultiplier according to claim 1, wherein the elastic bellows and the inflatable sealing segment are cooperatively designed to convey the gas inside the gas chamber to the inflatable sealing segment when the elastic bellows is compressed, so that the inflatable sealing segment is inflated to surround in a wrapping manner to fit joints with different diameters.

4. The sealed water-proof device for the photomultiplier according to claim 1, wherein the elastic corrugated sections of the upper extrusion air ring and the lower extrusion air ring are both provided with corrugated plates, and the corrugated plates can support the elastic corrugated sections through the corrugated plates, so that when the upper extrusion air ring and the lower extrusion air ring are extruded, the corrugated plates can be slowly deformed to compensate for the displacement of the upper extrusion air ring and the lower extrusion air ring, and the upper extrusion air ring and the lower extrusion air ring are prevented from being burst due to too fast deformation.

5. The sealing waterproof device for the photomultiplier according to claim 4, wherein the longitudinal section of the lower extrusion air ring is L-shaped.

6. The sealing waterproof device for the photomultiplier according to claim 1, wherein the inner walls of the expansion seal sections of the upper extrusion air ring and the lower extrusion air ring are provided with corrugated grooves, so that the displacement of the expansion seal sections can be compensated, and the expansion seal sections can be contracted, thereby reducing the volume of the internal air cavity, further expanding the expansion seal sections, and sealing the joints.

7. The sealing waterproof device for the photomultiplier according to claim 1, wherein the guide bars are correspondingly disposed inside the guide grooves, and the width of the ends of the guide bars is larger than the width of the roots.

8. The sealed waterproof device for the photomultiplier according to claim 2, wherein a seal is disposed on an inner wall of the upper seal ring body, and a seal is disposed on an inner wall of the lower seal ring body.

9. The water-tight seal for photomultiplier according to claim 8, wherein the seal is made of a rubber material.

Technical Field

The invention discloses a sealed waterproof device for a photomultiplier, relates to a sealed waterproof device capable of being used in the photomultiplier, and belongs to the technical field of photomultiplier protection. In particular to a sealing waterproof device which can carry out waterproof sealing on the connection part of a photomultiplier and a cable circuit board.

Background

The photomultiplier is a vacuum electronic device which converts weak optical signals into electrical signals, the photomultiplier is commonly used in optical measuring instruments and spectral analysis instruments, in some specific physical tests, the photomultiplier needs to be placed under water for test work, in order to avoid damage caused by contact between a photomultiplier pin and a circuit board, necessary waterproof sealing needs to be adopted at the joint of the photomultiplier, the existing waterproof sealing structure for the photomultiplier mostly adopts an annular sealing ring for extrusion sealing, but the sealing ring is mostly of a solid structure, the space of elastic extrusion deformation of the sealing ring is limited, the length of the formed sealing segment is short, and good sealing of the joint of an internal pipeline cannot be ensured in long-time use.

Notice No. CN209417310U discloses a watertight fittings for photomultiplier, including waterproof tube shell, photomultiplier and photomultiplier shell, the waterproof spiral shell lid of glass shell, the waterproof spiral shell lid of cable, the waterproof spiral shell lid of glass shell is articulated mutually with the waterproof tube shell, waterproof tube shell top is equipped with the draw-in groove that can fix the photomultiplier shell, still cup joint the glass shell sealing washer on the photomultiplier shell, waterproof tube shell bottom is equipped with the outlet that supplies waterproof cable to wear out, the outlet is articulated mutually with the waterproof spiral shell of cable, be equipped with the cable sealing washer between outlet and the waterproof cable, its sealing washer of this watertight fittings is solid construction, and the sealing section that forms when sealed is shorter, and the sealing layer is single moreover, and sealed water-proof effects is unsatisfactory under the long-time use.

Disclosure of Invention

In order to improve the situation, the invention provides a sealing waterproof device for a photomultiplier, which is a sealing waterproof device for waterproof sealing of the connection part of the photomultiplier and a cable circuit board, wherein a first layer of waterproof sealing structure is formed by extruding an extrusion conical surface through an upper sealing cap and a lower sealing cap, a second layer of waterproof sealing structure is formed by wrapping the photomultiplier and a cable on the photomultiplier through the expansion of an expansion sealing section, a third layer of waterproof sealing structure is formed by pouring sealant in a main sealing tube, and the third layer of waterproof sealing structure is used for waterproof sealing of the connection part of the photomultiplier and the cable circuit board.

The invention discloses a sealed waterproof device for a photomultiplier, which is realized by the following steps: the invention relates to a sealed waterproof device for a photomultiplier, which comprises an upper sealing cap, an upper sealing ring body, a main sealing tube, a limiting ring, a potting colloid, a tube connecting sleeve, a lower sealing cap, a lower sealing ring body, an extrusion conical surface, an elastic corrugated section, an expansion sealing section, an air cavity, a corrugated groove, an upper extrusion air ring and a lower extrusion air ring, wherein the main sealing tube is of a tubular structure with one open end, the upper extrusion air ring is arranged at one end opening part of the main sealing tube, the longitudinal section of the upper extrusion air ring is inverted L-shaped, the air cavity is formed inside the upper extrusion air ring, one end of the upper extrusion air ring is formed into the elastic corrugated section, the other end of the upper extrusion air ring is formed into the expansion sealing section, the upper sealing cap is sleeved on one end of the main sealing tube and is contacted with the top of the upper extrusion air ring body, a plurality of upper sealing ring bodies are arranged at the top of the upper extrusion air ring body, the upper sealing ring body is of a conical structure, and the upper sealing ring body is attached to the inner wall of the upper sealing cap, the joint surface between the upper sealing ring body and the upper sealing cap forms an extrusion conical surface, the limiting ring is arranged in the main sealing pipe, the pouring sealant is arranged in the main sealing pipe and is positioned between the limiting ring and the other end of the main sealing pipe, the pouring sealant and the limiting ring are matched to form a cavity, the middle part of the pouring sealant is provided with a communicating groove, the pipe connecting sleeve is arranged at the other end of the main sealing pipe and is communicated with the cavity through the communicating groove, the lower extrusion gas ring is arranged at the opening part of the pipe connecting sleeve, the longitudinal section of the lower extrusion gas ring is L-shaped, the inside of the lower extrusion gas ring forms an air cavity, one end of the lower extrusion gas ring forms an elastic corrugated section, the elastic corrugated sections of the upper extrusion gas ring and the lower extrusion gas ring are respectively provided with a corrugated plate, the other end of the lower extrusion gas ring forms an expansion sealing section, the inner walls of the expansion sealing sections of the upper extrusion gas ring and the lower extrusion gas ring are respectively provided with a corrugated groove, the lower sealing cap sleeve is arranged on the pipe connecting sleeve, and contact with the bottom of extruding the gaseous ring down, a plurality of lower sealing ring body ring arrange the bottom of extruding the gaseous ring down in, and lower sealing ring body is the taper structure, and lower sealing ring body and the inner wall of lower sealing cap laminate mutually, and lower sealing ring body and the binding face between the lower sealing cap form the extrusion conical surface, the buckled plate has been put on the elastic ripple section, upward the equidistance on the sealing ring body is opened has a plurality of guide bars, upward the equidistance on the sealing cap is opened has a plurality of guide grooves, the equidistance on the lower sealing ring body is opened has a plurality of guide bars, the equidistance on the lower sealing cap is opened has a plurality of guide grooves, inside the guide bar correspondence is arranged in the guide groove, the width of guide bar tip is greater than the width of root, upward the sealed pad has been put on the inner wall of sealing ring body, the inner wall of lower sealing ring body is put sealed the pad, sealed pad is made by the rubber material.

Has the beneficial effects.

The multi-layer waterproof sealing structure can be formed at the joint of the photomultiplier and the cable circuit board, the length of the sealing section is long, and the sealing effect is good.

And secondly, secondary sealing is performed by utilizing the expansion of the air bag, so that the joint with different radius errors and different thicknesses can be better fitted, and the sealing effect is ensured.

Thirdly, the installation and the use are simple and convenient.

Fourthly, the structure is simple, and the device is convenient and practical.

Fifthly, the cost is low, and the popularization is convenient.

Drawings

FIG. 1 is a schematic structural view of a sealing waterproof device for a photomultiplier according to the present invention;

FIG. 2 is a schematic view showing the structure of an upper sealing cap of a sealing waterproof device for a photomultiplier according to the present invention;

FIG. 3 is a schematic view showing the structure of a sealing ring body of a sealing waterproof device for a photomultiplier according to the present invention;

FIG. 4 is a schematic view showing the structure of the lower sealing ring of the sealing waterproof device for the photomultiplier according to the present invention.

In the attached drawings

Wherein the method comprises the following steps: photomultiplier (1), go up sealing cap (2), go up sealing ring body (3), main sealed tube (4), spacing ring (5), circuit board (6), encapsulating colloid (7), union coupling (8), lower sealing cap (9), lower sealing ring body (10), cable (11), pin (12), extrusion conical surface (13), elastic wave section (14), inflation sealing section (15), air cavity (16), fold groove (17), go up extrusion gas ring (18), extrude gas ring (19) down.

The specific implementation mode is as follows:

the invention discloses a sealed waterproof device for a photomultiplier, which is realized by the following steps: the invention relates to a sealed waterproof device for a photomultiplier, which comprises an upper sealing cap (2), an upper sealing ring body (3), a main sealing tube (4), a limiting ring (5), a potting colloid (7), a tube connecting sleeve (8), a lower sealing cap (9), a lower sealing ring body (10), an extrusion conical surface (13), an elastic corrugated section (14), an expansion sealing section (15), an air cavity (16), a corrugated groove (17), an upper extrusion air ring (18) and a lower extrusion air ring (19), wherein the main sealing tube (4) is of a tubular structure with one open end, the upper extrusion air ring (18) is arranged at the mouth part at one end of the main sealing tube (4), the longitudinal section of the upper extrusion air ring (18) is inverted L-shaped, the air cavity (16) is formed inside the upper extrusion air ring (18), the elastic corrugated section (14) is formed at one end of the upper extrusion air ring (18), and the expansion sealing section (15) is formed at the other end of the upper extrusion air ring (18), the upper sealing cap (2) is sleeved on one end of the main sealing pipe (4) and is contacted with the top of the upper extrusion air ring (18), a plurality of upper sealing ring bodies (3) are annularly arranged on the top of the upper extrusion air ring (18), the upper sealing ring bodies (3) are of a cone-shaped structure, the upper sealing ring bodies (3) are attached to the inner wall of the upper sealing cap (2), the attaching surface between the upper sealing ring bodies (3) and the upper sealing cap (2) forms an extrusion conical surface (13), the limiting ring (5) is arranged in the main sealing pipe (4), the potting colloid (7) is arranged in the main sealing pipe (4) and is positioned between the limiting ring (5) and the other end of the main sealing pipe (4), the potting colloid (7) is matched with the limiting ring (5) to form a cavity, a communicating groove is formed in the middle of the potting colloid (7), the pipe connecting sleeve (8) is arranged on the other end of the main sealing pipe (4) and is communicated with the cavity through the communicating groove, the mouth part of a pipe connecting sleeve (8) is arranged in lower extrusion air ring (19), the longitudinal section of the lower extrusion air ring (19) is L-shaped, an air cavity (16) is formed inside the lower extrusion air ring (19), an elastic corrugated section (14) is formed at one end of the lower extrusion air ring (19), corrugated plates are arranged on the elastic corrugated sections (14) of the upper extrusion air ring (18) and the lower extrusion air ring (19), the other end of the lower extrusion air ring (19) forms an expansion sealing section (15), corrugated grooves (17) are formed in the inner walls of the expansion sealing sections (15) of the upper extrusion air ring (18) and the lower extrusion air ring (19), a lower sealing cap (9) is sleeved on the pipe connecting sleeve (8) and is contacted with the bottom part of the lower extrusion air ring (19), a plurality of lower sealing ring bodies (10) are arranged at the bottom part of the lower extrusion air ring (19), the lower sealing ring bodies (10) are of a taper structure, and the lower sealing ring bodies (10) are attached to the inner wall of the lower sealing cap (9), lower sealing ring body (10) and binding face between lower sealing cap (9) form extrusion conical surface (13), the buckled plate has been put on elastic wave section (14), upward the equal angle of sealing ring body (3) is opened and is had a plurality of guide bars, upward the equal angle of sealing cap (2) is opened and is had a plurality of guide grooves, equal angle of sealing ring body (10) is opened and is had a plurality of guide bars down, equal angle of sealing cap (9) is opened and is had a plurality of guide grooves down, the guide bar corresponds and arranges the inside of guide groove in, the width of guide bar tip is greater than the width of root, upward the sealed pad has been put on the inner wall of sealing ring body (3), the sealed pad has been put on the inner wall of lower sealing ring body (10), sealed pad is made by the rubber material.

When the waterproof sealing structure is used, a main sealing tube (4) filled with the potting colloid (7) is sleeved on the photomultiplier (1), at the moment, the photomultiplier (1) is limited by the limiting ring (5), the limiting ring (5) and the potting colloid (7) are matched to form a cavity, a pin (12) and a circuit board (6) on the photomultiplier (1) are located in the cavity, a cable (11) connected with the circuit board (6) penetrates out of the tube connecting sleeve (8), and then an upper sealing cap (2) at one port of the column sealing tube and a lower sealing cap (9) at the port of the tube connecting sleeve (8) are screwed, so that the upper sealing cap (2) extrudes the upper sealing ring body (3), and the lower sealing cap (9) extrudes the lower sealing ring body (10), and a first waterproof sealing structure at the joint of the photomultiplier (1) and the cable (11) is formed;

then the upper sealing cap (2) extrudes the upper sealing ring body (3), so that the upper sealing ring body (3) extrudes the upper extrusion gas ring (18), the elastic corrugated section (14) on the upper extrusion gas ring (18) is extruded, gas is transmitted to the inside of the expansion sealing section (15) of the upper extrusion gas ring (18), the expansion sealing section (15) of the upper extrusion gas ring (18) is expanded to wrap the photomultiplier tube (1), the lower sealing cap (9) extrudes the lower sealing ring body (10), so that the lower sealing ring body (10) extrudes the lower extrusion gas ring (19), the elastic corrugated section (14) on the lower extrusion gas ring (19) is extruded, the gas is transmitted to the inside of the expansion sealing section (15) of the lower extrusion gas ring (19), the expansion sealing section (15) of the lower extrusion gas ring (19) is expanded to wrap the cable (11), thereby forming a second layer of waterproof sealing structure at the joint of the photoelectric sealing tube and the cable (11);

the potting colloid (7) in the main sealing pipe (4) forms a third layer of waterproof sealing structure so as to prevent water;

the elastic corrugated sections (14) of the upper extrusion air ring (18) and the lower extrusion air ring (19) are respectively provided with a corrugated plate, and the elastic corrugated sections (14) can be supported through the corrugated plates, so that when the upper extrusion air ring (18) and the lower extrusion air ring (19) are extruded, the corrugated plates can be slowly deformed to compensate the displacement of the upper extrusion air ring (18) and the lower extrusion air ring (19), and the upper extrusion air ring (18) and the lower extrusion air ring (19) are prevented from bursting due to too fast deformation;

the inner walls of the expansion sealing sections (15) of the upper extrusion air ring (18) and the lower extrusion air ring (19) are respectively provided with a fold groove (17), so that the displacement of the expansion sealing sections (15) can be compensated, and the expansion sealing sections can be contracted, the volume of an internal air cavity (16) is reduced, and the expansion sealing sections (15) are further expanded to wrap and seal joints;

the guide strips are correspondingly arranged in the guide grooves, the width of the end parts of the guide strips is larger than that of the root parts of the guide strips, and the guide strips and the guide grooves are matched to clamp and guide, so that the upper sealing cap (2) and the lower sealing cap (9) are prevented from slipping;

the sealing gasket is arranged on the inner wall of the upper sealing ring body (3), the sealing gasket is arranged on the inner wall of the lower sealing ring body (10), the sealing gasket is made of rubber materials, the sealing performance between the upper sealing ring body (3) and the lower sealing ring body (10) and the connection part can be improved, the connection part with different diameters can be matched through the elasticity of the sealing gasket, and the applicability is wider;

the elastic corrugated section (14) and the expansion sealing section (15) are matched, when the elastic corrugated section (14) is extruded, gas in the air cavity (16) can be conveyed to the expansion sealing section (15), so that the expansion sealing section (15) is expanded to wrap around, joints with different diameters are matched, and the applicability is wider;

the upper sealing ring body (3) is matched with the upper sealing cap (2), the lower sealing ring body (10) is matched with the lower sealing cap (9), the upper sealing cap (2) and the lower sealing cap (9) extrude the upper sealing ring body (3) and the lower sealing ring body (10) through the extrusion conical surface (13), so that the upper sealing rings are extruded to shrink to wrap and seal the photomultiplier (1), and the lower sealing rings are extruded to shrink to wrap and seal the cable (11), so that a first layer of water proofing is formed;

reach through last sealing cap (2) and lower sealing cap (9) to the extrusion of extrusion conical surface (13), form first layer waterproof sealing structure, the inflation through inflation sealing section (15) wraps up photomultiplier (1) and cable (11) above that, form second floor waterproof sealing structure, form third layer waterproof sealing structure through pouring sealant (7) of main sealing tube (4) inside, three-layer waterproof sealing structure carries out waterproof sealing's purpose to photomultiplier (1) and cable (11) circuit board (6) junction.