Optical fiber temperature measurement calibration device

Abstract

The utility model discloses an optical fiber temperature measurement calibration device, and relates to the technical field of optical fiber temperature measurement devices, the optical fiber temperature measurement calibration device comprises a main shell, a temperature control module and a pumping module, the main shell comprises a first upper shell and a first lower shell, a liquid storage chamber is formed on the first lower shell, the first upper shell and the first lower shell enclose to form a detection chamber, and the temperature control module is connected with the pumping module. The first upper shell and the first lower shell are detachably connected, the detection cavity is provided with two opposite wire passing holes, part of the hole walls of the wire passing holes are formed in the first upper shell, the other part of the hole walls of the wire passing holes are formed in the first lower shell, the detection cavity is provided with a liquid passing hole communicated with the liquid storage cavity, and the filter part is arranged in the detection cavity and covers the liquid passing hole; the temperature control module comprises a heating piece, an electric control board and a temperature sensor which are electrically connected in sequence, and the heating piece and the temperature sensor are arranged in the detection chamber; the pumping module is arranged in the liquid storage cavity and communicated with the liquid passing hole. According to the technical scheme, dirt in the detection cavity can be prevented from blocking the pumping module.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber temperature measuring devices, in particular to an optical fiber temperature measuring calibration device. Background Art

[0002] The temperature of a power cable is an important parameter that reflects its operating status. By measuring and monitoring the surface temperature of the cable, we can fully understand its insulation aging, evaluate its working status, and promptly detect faults and hidden dangers. With the continuous development of my country's fiber optic sensing field, due to the characteristics of distributed fiber optic temperature measurement, such as long measurement distance, high temperature measurement accuracy, and low laying cost, it is now widely used in the field of cable temperature measurement. my country has also issued corresponding technical specifications based on distributed fiber optic temperature measurement of cables, requiring that the optical fiber for cable temperature measurement must be laid close to the cable. After a period of use, it needs to be calibrated according to the actual temperature in the tunnel. Currently, there is a calibration device that includes a constant temperature box containing liquid, a heating element for heating the liquid, and a temperature sensor. The optical fiber to be tested and the cable bound to the optical fiber are immersed in high-temperature liquid, and the temperature of the liquid measured by the optical fiber is compared with the temperature measured by the temperature sensor, thereby achieving calibration. After a period of use, dust, leaves, and animal droppings accumulate on the cable's protective casing. Even if the cable and optical fiber are cleaned before testing, the dirt accumulated in the gap between the optical fiber and the cable cannot be easily wiped off. After being soaked in high-temperature liquid, the dirt is softened by the liquid and falls into the thermostat, where it can clog the liquid pipes or damage the water pump. Furthermore, wiping the cable before installing the thermostat increases the calibration workload and is inconvenient. Utility Model Content

[0003] The main purpose of the present invention is to provide an optical fiber temperature measurement and calibration device, aiming to solve at least one of the above problems.

[0004] To achieve the above objectives, the optical fiber temperature measurement and calibration device proposed in the present invention comprises:

[0005] The main housing includes a first upper shell and a first lower shell, the first lower shell is formed with a liquid storage chamber, the first upper shell and the first lower shell enclose a detection chamber, the first upper shell and the first lower shell are detachably connected, the detection chamber is provided with two oppositely arranged wire holes, the optical fiber passes through the detection chamber through the wire holes, part of the hole wall of the wire hole is formed on the first upper shell, and the other part of the hole wall is formed on the first lower shell, the detection chamber is provided with a liquid hole communicating with the liquid storage chamber, and a filter is provided in the detection chamber and covers the liquid hole;

[0006] a temperature control module, comprising a heating element, an electric control board and a temperature sensor electrically connected in sequence, wherein the heating element and the temperature sensor are arranged in the detection chamber;

[0007] The pumping module is arranged in the liquid storage chamber and communicated with the liquid hole.

[0008] In one embodiment, the pumping unit includes a bidirectional water pump and a connecting pipe. The bidirectional water pump has two suction ports. One end of the connecting pipe is connected to the liquid hole, and the other end is connected to one of the suction ports.

[0009] In one embodiment, a circulating water pump is provided in the detection chamber, and two filters are provided, one filter covering the water inlet of the circulating water pump, and the other filter covering the liquid outlet.

[0010] In one embodiment, the filter element is configured as a table-shaped structure, and the large end of the filter element abuts against the end wall of the liquid passage hole.

[0011] In one embodiment, the filter element includes a filter mesh and a support frame, wherein the filter mesh covers the support frame to form the side surfaces and the small end of the table-shaped structure.

[0012] In one embodiment, the optical fiber temperature measurement and calibration device further includes at least one auxiliary shell, the auxiliary shell including a second upper shell and a second lower shell that can be detachably connected, the second upper shell and the second lower shell enclose a auxiliary detection chamber, the auxiliary detection chamber is connected to the detection chamber, and has two auxiliary wire holes provided on opposite sides of the auxiliary detection chamber, and the axis of the auxiliary wire hole and the axis of the wire hole are configured to be the same axis.

[0013] In one embodiment, the main shell extends along a first direction, the detection chamber extends along the first direction, the liquid storage chamber is arranged circumferentially of the detection chamber, and the auxiliary detection chamber is arranged at one end of the detection chamber in the first direction.

[0014] In one embodiment, the detection chamber and the auxiliary detection chamber are configured as the same structure, and the wire-passing hole and the auxiliary wire-passing hole are configured as the same structure.

[0015] In one embodiment, the end plate of the main shell in the first direction is provided with a through hole, and the through hole is arranged relative to the detection chamber so as to be able to connect with the auxiliary detection chamber. When the auxiliary shell is not provided at one end of the main shell in the first direction, the through hole is sealed by a sealing plug.

[0016] In one embodiment, the main housing and the auxiliary housing are connected in the first direction by threads.

[0017] In one embodiment, a snap ring protrusion is provided on the end portion of the main housing in the first direction, and the auxiliary housing has an elastic snap plate extending along the first direction, and the elastic snap plate is snap-connected with the snap ring protrusion.

[0018] In one embodiment, the first upper shell and the first lower shell are hinged, the second upper shell and the second lower shell are hinged, and sealing rings are sandwiched between the first upper shell and the first lower shell, and between the second upper shell and the second lower shell.

[0019] In one embodiment, the main shell and the auxiliary shell constitute the shell of the optical fiber temperature measurement and calibration device, the first upper shell and the second upper shell constitute the upper shell, the first lower shell and the second lower shell constitute the lower shell, the inner wall of the wire passing hole and the inner wall of the auxiliary wire passing hole are both provided with a seal, and the seal includes an upper sealing section provided on the upper shell and a lower sealing section provided on the lower shell. When the upper shell and the lower shell are close to each other, the upper sealing section abuts against the lower sealing section and has elastic potential energy.

[0020] The present invention's technical solution involves placing a filter over the liquid passage to prevent dirt from entering the detection chamber and, consequently, the liquid reservoir. This helps prevent excessive accumulation of dirt in the pumping module or the liquid reservoir, which could adversely affect the pumping module's operation. It also reduces the need for workers to clean the cables, thus facilitating calibration. In the optical temperature measurement and calibration device of the present invention, after the first upper and lower shells are assembled, an optical fiber passes through the detection chamber, where liquid is heated to a preset temperature. The optical fiber then measures the temperature of the liquid in the detection chamber and compares it with the temperature measured by the temperature transducer. After the comparison is complete, the pumping module pumps the liquid back into the liquid reservoir through the liquid passage. This prevents spillage of liquid from the detection chamber during the cable detachment process between the first upper and lower shells, reduces the frequency of liquid addition to the detection chamber during temperature calibration, and enhances the convenience of calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a structural diagram of an embodiment of the optical fiber temperature measurement and calibration device provided by the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the middle auxiliary shell.

[0024] Description of Figure Numbers:

[0025] 100, main housing; 11, first upper housing; 12, first lower housing; 13, liquid storage chamber; 14, detection chamber; 141, liquid passage hole; 142, wire passage hole;

[0026] 200, auxiliary housing; 21, second upper housing; 22, second lower housing; 23, auxiliary detection chamber; 231, auxiliary wire hole;

[0027] 300, temperature control module; 31, heating element; 32, temperature sensor;

[0028] 400. Pumping module; 41. Bidirectional water pump; 42. Connecting pipe; 43. Circulating water pump.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The utility model provides an optical fiber temperature measurement and calibration device.

[0034] See also Figure 1 and Figure 2 In one embodiment of the present invention, the optical fiber temperature measurement and calibration device comprises:

[0035] The main housing 100 includes a first upper shell 11 and a first lower shell 12. A liquid storage chamber 13 is formed on the first lower shell 12. The first upper shell 11 and the first lower shell 12 enclose a detection chamber 14. The first upper shell 11 and the first lower shell 12 are detachably connected. Two oppositely arranged wire holes 142 are provided on two opposite side walls of the detection chamber 14. The optical fiber passes through the detection chamber 14 through the wire holes 142. Part of the hole wall of the wire hole 142 is formed in the first upper shell 11, and the other part of the hole wall is formed in the first lower shell 12. The detection chamber 14 is provided with a liquid hole 141 that communicates with the liquid storage chamber 13. The filter element 600 is disposed in the detection chamber 14 and covers the liquid hole 141.

[0036] The temperature control module 300 includes a heating element 31, an electric control board and a temperature sensor 32 which are electrically connected in sequence. The heating element 31 and the temperature sensor 32 are arranged in the detection chamber 14;

[0037] The pumping module 400 is disposed in the liquid storage chamber 13 and communicates with the liquid hole 141 .

[0038] The present invention's technical solution involves placing a filter 600 over the liquid passage hole 141 to prevent dirt within the detection chamber 14 from entering the pumping module 400, thereby preventing dirt from entering the liquid storage chamber 13. This helps prevent excessive accumulation of dirt in the pumping module 400 or the liquid storage chamber 13, which could adversely affect the operation of the pumping module 400. It also reduces the need for operators to clean the cables, making calibration more convenient. In the optical temperature measurement calibration device of the present invention, after the first upper shell 11 and the first lower shell 12 are assembled, the optical fiber passes through the detection chamber 14, and the liquid is heated to a preset temperature in the detection chamber 14. The optical fiber then measures the temperature of the liquid in the detection chamber 14 and compares it with the temperature measured by the temperature transducer. After the comparison is completed, the pumping module 400 pumps the liquid back to the liquid storage module from the liquid hole 141, which helps prevent the first upper shell 11 and the first lower shell 12 from spilling the liquid in the liquid detection chamber 14 during the process of detaching the cable, and helps reduce the frequency of the staff adding liquid to the detection chamber 14 during the temperature calibration process, thereby enhancing the convenience of the calibration work. It should be noted that before installing the main shell 100 to the cable, the cable needs to be powered off.

[0039] In one embodiment, the pumping unit includes a two-way water pump 41 and a connecting pipe 42. The two-way water pump 41 has two suction ports. One end of the connecting pipe 42 is connected to the liquid hole 141, and the other end is connected to a suction port. That is, the pumping unit can pump the liquid in the liquid storage chamber 13 from the liquid hole 141 to the detection chamber 14, and can also pump the liquid in the detection chamber 14 back to the liquid storage chamber 13. That is, the liquid flows between the detection chamber 14 and the liquid storage chamber 13 through the liquid hole 141, so the filter element 600 can effectively prevent scale in the detection chamber 14 from entering the two-way water pump 41 and the connecting pipe 42. In other embodiments, the pumping unit can also be a one-way water pump that can only pump liquid out of the detection chamber 14.

[0040] In one embodiment, a circulating water pump 500 is provided within the detection chamber 14, along with two filters 600. One filter 600 covers the water inlet of the circulating water pump 500, preventing dirt from entering the circulating water pump 500 and reducing the risk of damage. The other filter 600 covers the liquid outlet. The circulating water pump 500 ensures uniform distribution of heated liquid within the detection chamber 14, preventing a temperature difference between the liquid near the optical fiber and the liquid near the temperature sensor 32. In other embodiments, the circulating water pump 500 may not be provided.

[0041] In one embodiment, the filter element 600 is configured as a table-shaped structure, with the larger end of the filter element 600 abutting the end wall of the liquid passage hole 141. In this case, an angle is formed between the side surface of the filter element 600 and the end surface of the liquid passage hole 141. On the outside of the filter element 600, the table-shaped side surface of the filter element 600 and the end surface of the liquid passage hole 141 form an obtuse angle. When liquid in the detection chamber 14 flows through the liquid passage hole 141 to the liquid storage chamber 13, dirt is driven by the water flow toward the liquid passage hole 141 and abutted by the filter element 600, accumulating around the filter element 600. The obtuse angle between the table-shaped side surface of the filter element 600 and the end surface of the liquid passage hole 141 effectively reduces the period of high dirt accumulation around the filter element 600, preventing personnel from frequently flushing the detection chamber 14 during optical fiber calibration. In other embodiments, the filter element 600 can also be configured as a columnar structure.

[0042] In one embodiment, the filter element 600 includes a filter screen and a support frame, wherein the filter screen covers the support frame to form the sides and small end of the platform-like structure. In other embodiments, the filter element 600 can also be configured as an integrated structure with multiple filter holes opened on the sides and small end.

[0043] In one embodiment, the optical fiber temperature measurement and calibration device further includes at least one auxiliary housing 200. The auxiliary housing 200 includes a detachably connected second upper housing 21 and a second lower housing 22. The second upper housing 21 and the second lower housing 22 enclose a secondary detection chamber 23. The secondary detection chamber 23 communicates with the detection chamber 14 and has two auxiliary wire holes 231142 located on opposite sides of the auxiliary detection chamber 23. The axes of the auxiliary wire holes 231142 and the wire hole 142 are aligned. The optical fiber passes through both the wire holes 142 and the auxiliary wire holes 231142 to penetrate the detection chamber 14 and the auxiliary detection chamber 23. After the optical fiber is installed in the main housing 100 and the auxiliary housing 200, it will not bend, thereby preventing interference with the detection results. The auxiliary detection chamber 23 cooperates with the detection chamber 14 to extend the detection and calibration range of the optical fiber temperature measurement and calibration device during a single operation. In other embodiments, the auxiliary housing 200 may be omitted.

[0044] In one embodiment, the main housing 100 extends along a first direction, the detection chamber 14 extends along the first direction, the liquid storage chamber 13 is disposed circumferentially around the detection chamber 14, and the auxiliary detection chamber 23 is disposed at one end of the detection chamber 14 in the first direction. That is, the auxiliary detection chamber 23 and the detection chamber 14 are both oriented in the first direction, with the liquid storage chamber 13 circumferentially around the detection chamber 14. Specifically, when two auxiliary detection chambers 23 are provided, one auxiliary detection chamber 23 is disposed at one end of the detection chamber 14 in the first direction, and the other auxiliary detection chamber 23 is disposed at the other end of the detection chamber 14 in the first direction. In other embodiments, when only one auxiliary detection chamber 23 is provided, the liquid storage chamber 13 and the auxiliary detection chamber 23 are disposed at opposite ends of the detection chamber 14 in the first direction.

[0045] In one embodiment, the detection chamber 14 and the auxiliary detection chamber 23 are configured to have the same structure, and the wire hole 142 and the auxiliary wire hole 231142 are configured to have the same structure. That is, the detection chamber 14 is composed of the first upper shell 11, the first lower shell 12, the second upper shell 21, and the second lower shell 22, so that liquid can flow smoothly through the connection between the main shell 100 and the auxiliary shell 200. In another embodiment, the end plate of the main shell 100 in the first direction is provided with a through hole, and the through hole is arranged relative to the detection chamber 14 so as to be able to communicate with the auxiliary detection chamber 23. When the auxiliary shell 200 is not provided at one end of the main shell 100 in the first direction, that is, when the detection chamber 14 is located at this end and connected to the auxiliary detection chamber 23, the through hole is sealed by a sealing plug to prevent liquid from flowing out.

[0046] In one embodiment, the main housing 100 and the auxiliary housing 200 are connected by threads in the first direction. This thread arrangement ensures that when the auxiliary housing 200 and the main housing 100 are fully screwed together, the first upper shell 11 and the second upper shell 21 are located on the same side, and the gap between the first upper shell 11 and the first lower shell 12 is flush with the gap between the second upper shell 21 and the second lower shell 22. In another embodiment, a snap ring protrusion is provided at the end of the main housing 100 in the first direction, and the auxiliary housing 200 has an elastic clip extending along the first direction, which snaps into contact with the snap ring protrusion.

[0047] In one embodiment, the first upper shell 11 and the first lower shell 12 are hinged, and the second upper shell 21 and the second lower shell 22 are hinged. Seal rings are interposed between the first upper shell 11 and the first lower shell 12, and between the second upper shell 21 and the second lower shell 22 to prevent liquid leakage. The main shell 100 and the auxiliary shell 200 constitute the shell portion of the optical fiber temperature measurement and calibration device. The first upper shell 11 and the second upper shell 21 constitute the upper shell portion, and the first lower shell 12 and the second lower shell 22 constitute the lower shell portion. The inner walls of the wire hole 142 and the inner walls of the auxiliary wire hole 231142 are both ringed with seals. The seals include an upper sealing section provided on the upper shell portion and a lower sealing section provided on the lower shell portion. When the upper shell portion and the lower shell portion are brought close to each other, the upper sealing section abuts against the lower sealing section and has elastic potential energy, thereby clamping the optical fiber while sealing the liquid hole 141 and the auxiliary liquid hole 141. In other embodiments, sealing can also be performed using sealant.

[0048] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An optical fiber temperature measurement and calibration device, characterized in that: include: The main housing includes a first upper shell and a first lower shell, the first lower shell is formed with a liquid storage chamber, the first upper shell and the first lower shell enclose a detection chamber, the first upper shell and the first lower shell are detachably connected, the detection chamber is provided with two oppositely arranged wire holes, the optical fiber passes through the detection chamber through the wire holes, part of the hole wall of the wire hole is formed on the first upper shell, and the other part of the hole wall is formed on the first lower shell, the detection chamber is provided with a liquid hole communicating with the liquid storage chamber, and a filter is provided in the detection chamber and covers the liquid hole; a temperature control module, comprising a heating element, an electric control board and a temperature sensor electrically connected in sequence, wherein the heating element and the temperature sensor are arranged in the detection chamber; The pumping module is arranged in the liquid storage chamber and communicated with the liquid hole.

2. The optical fiber temperature measurement and calibration device according to claim 1, wherein: The pumping unit includes a bidirectional water pump and a connecting pipe. The bidirectional water pump has two suction ports. One end of the connecting pipe is connected to the liquid hole, and the other end is connected to the suction port.

3. The optical fiber temperature measurement and calibration device according to claim 2, wherein: A circulating water pump is provided in the detection chamber, and two filtering elements are provided. One of the filtering elements covers the water inlet of the circulating water pump, and the other filtering element covers the liquid outlet.

4. The optical fiber temperature measurement and calibration device according to claim 3, wherein: The filter element is configured as a table-shaped structure, and the large end of the filter element abuts against the end wall of the liquid hole.

5. The optical fiber temperature measurement and calibration device according to claim 4, characterized in that: The filter element comprises a filter screen and a support frame, wherein the filter screen covers the support frame to form the side surface and the small end of a table-shaped structure.

6. The optical fiber temperature measurement and calibration device according to claim 1, wherein: The optical fiber temperature measurement and calibration device also includes at least one auxiliary shell, which includes a second upper shell and a second lower shell that can be detachably connected, and the second upper shell and the second lower shell enclose a secondary detection chamber, which is connected to the detection chamber and has two auxiliary wire holes arranged on opposite sides of the auxiliary detection chamber, and the axis of the auxiliary wire hole and the axis of the wire hole are configured to be the same axis.

7. The optical fiber temperature measurement and calibration device according to claim 6, characterized in that: The main housing extends along a first direction, the detection chamber extends along the first direction, the liquid storage chamber is arranged in a circumferential direction of the detection chamber, and the auxiliary detection chamber is arranged at one end of the detection chamber in the first direction.

8. The optical fiber temperature measurement and calibration device according to claim 7, wherein: The detection chamber and the auxiliary detection chamber are configured as the same structure, and the wire-passing hole and the auxiliary wire-passing hole are configured as the same structure; Alternatively, the end plate of the main shell in the first direction is provided with a through hole, and the through hole is arranged relative to the detection chamber so as to be able to connect to the auxiliary detection chamber. When the auxiliary shell is not provided at one end of the main shell in the first direction, the through hole is sealed by a sealing plug.

9. The optical fiber temperature measurement and calibration device according to claim 7, wherein: The main housing and the auxiliary housing are connected by threads in a first direction; Alternatively, a snap ring protrusion is provided on the end portion of the main housing in the first direction, and the auxiliary housing has an elastic snap plate extending along the first direction, and the elastic snap plate is snap-connected with the snap ring protrusion.

10. The optical fiber temperature measurement and calibration device according to claim 6, wherein: The first upper shell and the first lower shell are hinged, the second upper shell and the second lower shell are hinged, and a sealing ring is sandwiched between the first upper shell and the first lower shell, and between the second upper shell and the second lower shell; And / or, the main shell and the auxiliary shell constitute the shell of the optical fiber temperature measurement and calibration device, the first upper shell and the second upper shell constitute the upper shell, the first lower shell and the second lower shell constitute the lower shell, the inner wall of the wire passing hole and the inner wall of the auxiliary wire passing hole are both provided with a seal, the seal includes an upper sealing section provided on the upper shell and a lower sealing section provided on the lower shell, when the upper shell and the lower shell approach each other, the upper sealing section abuts against the lower sealing section and has elastic potential energy.

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