Temperature measuring assembly and power system

Abstract

The utility model provides a temperature measuring assembly and a power system, the temperature measuring assembly is used for measuring the temperature of liquid in an oil pipe, a flow channel for liquid circulation is formed in the oil pipe, and the temperature measuring assembly comprises a detection pipe and a thermocouple wire; the detection pipe is arranged on an oil pipe and is communicated with the oil pipe; the thermocouple wire is arranged in the detection tube and comprises two metal wires, two end parts of the two metal wires are electrically connected to form a measuring end of the thermocouple wire, the measuring end penetrates through the detection tube and extends into the flow channel, and the other two end parts of the two metal wires form a connecting end of the thermocouple wire; the connecting end is used for being electrically connected with an external monitoring unit; wherein at least the part, located in the flow channel, of the metal wire is exposed; therefore, the problem of detection delay can be improved, and the detection sensitivity and accuracy are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system technical field, concretely relates to a temperature measuring assembly and power system. BACKGROUND

[0002] The traditional method for testing the temperature of the liquid in the small oil pipe is to install a tee pipe in the middle of the oil pipe, two openings of the tee pipe are communicated with the oil pipe respectively for liquid circulation, and a temperature measuring element is arranged on the other opening of the tee pipe for detecting the temperature of the liquid in the oil pipe. The temperature measuring element usually adopts an armored thermocouple or a PT100 thermal resistance. When the liquid flow in the oil pipe is small, the temperature of the oil pipe changes unobviously, which causes the detection delay of the temperature measuring element. In addition, the temperature measuring element usually includes a shell and a temperature sensing element arranged in the shell. When the temperature measuring element detects the temperature, the heat of the liquid is first transferred to the shell of the temperature measuring element from the oil pipe, and then transferred to the internal temperature sensing element through the shell. Therefore, when the temperature of the oil pipe changes unobviously, a large test error occurs, which reduces the test accuracy of the temperature measuring element. SUMMARY

[0003] The embodiment of the utility model provides a temperature measuring assembly and power system, can improve the technical problem that the traditional temperature measuring element detects the temperature of the liquid in the oil pipe and appears delay and inaccurate test result.

[0004] In the first aspect, the embodiment of the utility model provides a temperature measuring assembly for measuring the temperature of the liquid in the oil pipe, a flow channel for liquid circulation is formed in the oil pipe, and the temperature measuring assembly comprises:

[0005] A detection pipe is arranged on the oil pipe and communicated with the oil pipe; and

[0006] A thermocouple wire is arranged in the detection pipe, the thermocouple wire comprises two metal wires, two ends of the two metal wires are electrically connected to form a measurement end of the thermocouple wire, the measurement end penetrates through the detection pipe and extends into the flow channel, and the other two ends of the two metal wires form a connecting end of the thermocouple wire, which is electrically connected with an external monitoring unit;

[0007] Wherein, at least a part of the metal wire in the flow channel is arranged in a bare state.

[0008] In an embodiment, the temperature measuring assembly further comprises a tee pipe, the tee pipe comprises a main pipe section and a branch pipe section arranged at an angle, the branch pipe section is connected to the middle position of the main pipe section and communicated with the main pipe section, and the main pipe section is connected to the oil pipe to form the flow channel together with the oil pipe.

[0009] The branch pipe section forms the detection pipe, and the thermocouple wire is inserted into the branch pipe section.

[0010] In an embodiment, the measuring end of the thermocouple wire is spaced apart from the inner wall of the main pipe section.

[0011] In an embodiment, the detection pipe has two ports arranged oppositely, one of which is arranged on the oil pipe and communicates with the oil pipe;

[0012] The temperature measuring assembly further comprises a blocking member arranged on the other port to seal the detection pipe, and two through holes of the detection pipe are arranged on the blocking member;

[0013] The two metal wires are respectively inserted into the detection pipe from the two through holes.

[0014] In an embodiment, the blocking member comprises a cover and a plug-in pipe, the cover is arranged on the other port, the plug-in pipe is arranged on one side of the cover and is plugged into the other port, and the plug-in pipe communicates with the detection pipe.

[0015] The two through holes are arranged on the cover and communicate with the plug-in pipe.

[0016] In an embodiment, the temperature measuring assembly further comprises a sealing gel arranged in the plug-in pipe to block the through holes.

[0017] In an embodiment, the sealing gel is a silica gel, an epoxy resin, a polyurethane or a fluororubber.

[0018] In an embodiment, the inner wall of the plug-in pipe is provided with a plurality of protrusions, and the outer wall of the sealing gel is provided with a plurality of grooves, each of which is in a concave-convex fit with one of the protrusions.

[0019] In an embodiment, the temperature measuring assembly further comprises a limiting part arranged on at least one of the metal wires, the limiting part is in limiting fit with the detection pipe to limit the insertion depth of the metal wire, so that the measuring end is at the geometric center position of the flow passage.

[0020] In an embodiment, the temperature measuring assembly further comprises a blocking member arranged on the port of the detection pipe, the blocking member is provided with two through holes of the detection pipe, and the two metal wires are respectively inserted into the detection pipe from the two through holes.

[0021] The limiting part comprises a limiting ring sleeved outside the metal wire, and the limiting ring is in abutment with the plugging piece when the measuring end is at the geometric center position of the flow channel.

[0022] In an embodiment, the limiting ring is arranged close to the connecting end, and the lower end surface of the limiting ring is in abutment with the upper end surface of the plugging piece.

[0023] In an embodiment, the metal wire is arranged to protrude from the detection tube at the end part serving as the connecting end;

[0024] The thermocouple wire further comprises a protection tube sleeved outside the metal wire, the protection tube extends along the length direction of the metal wire, and one end of the protection tube is arranged flush with the end part serving as the connecting end of the metal wire, and the other end of the protection tube stops at the port of the detection tube.

[0025] In a second aspect, an embodiment of the utility model provides a power system, comprising:

[0026] A flow channel for liquid flow is formed in the oil pipe; and,

[0027] The temperature measuring assembly comprises a detection tube and a thermocouple wire, the detection tube is arranged on the oil pipe and communicates with the oil pipe, the thermocouple wire is arranged in the detection tube, and a measuring end of the thermocouple wire penetrates through the detection tube and extends into the flow channel.

[0028] The embodiment of the utility model has the advantages of:

[0029] In the embodiment of the utility model, the temperature measuring assembly is used for measuring the temperature of liquid in the oil pipe, a flow channel for liquid flow is formed in the oil pipe, and the temperature measuring assembly comprises a detection tube and a thermocouple wire; the detection tube is arranged on the oil pipe and communicates with the oil pipe; the thermocouple wire is arranged in the detection tube, a measuring end of the thermocouple wire penetrates through the detection tube and extends into the flow channel, a connecting end of the thermocouple wire is used for electrically connecting with an external monitoring unit, so that the measuring end for detecting temperature extends into the flow channel and directly contacts with liquid in the flow channel, and the detection delay problem can be improved; meanwhile, the metal wire of the thermocouple wire is arranged in a bare state at least in the part of the metal wire in the flow channel, that is to say, in the flow channel, the metal wire for temperature sensing directly contacts with liquid in the flow channel, so that the liquid temperature change can be more accurately sensed, and the sensitivity and accuracy of detection are improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0031] Figure 1 is a structural schematic view of the temperature measuring assembly provided by the embodiment of the present application;

[0032] Figure 2 is an exploded schematic view of the temperature measuring assembly provided by the embodiment of the present application;

[0033] Figure 3 is Figure 1 is a first kind of sectional view along B-B in the temperature measuring assembly;

[0034] Figure 4 is Figure 1 is a second kind of sectional view along B-B in the temperature measuring assembly;

[0035] Figure 5 is a structural schematic view of the power system provided by the embodiment of the present application.

[0036] The name of the component corresponding to the corresponding reference sign in the figure is:

[0037] 1000 power system;

[0038] 100 temperature measuring assembly; 1 detection tube; 11 port; 2 thermocouple wire; 2a measuring end; 2b connecting end; 21 metal wire; 211 end portion; 212 end portion; 3 tee pipe; 31 main pipe section; 311 inner wall; 32 branch pipe section; 4 plugging piece; 41 through hole; 42 cover body; 43 plug-in pipe; 44 protrusion; 5 sealing glue body; 51 outer wall; 52 groove; 6 limiting portion; 61 limiting ring; 7 protection tube;

[0039] 200 oil pipe; 201 first pipe section; 202 second pipe section;

[0040] A flow channel. DETAILED DESCRIPTION

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0042] Firstly, this utility model provides a temperature measuring component 100. (See also...) Figure 1 and Figure 2 The temperature measuring component 100 is used to measure the temperature of the liquid inside the oil pipe 200. A flow channel A for liquid flow is formed inside the oil pipe 200. The temperature measuring component 100 includes a detection tube 1 and a thermocouple wire 2. The detection tube 1 is disposed on the oil pipe 200 and communicates with the oil pipe 200. The thermocouple wire 2 is disposed inside the detection tube 1. The thermocouple wire 2 includes two metal wires 21. Two ends 211 of the two metal wires 21 are electrically connected to form the measuring end 2a of the thermocouple wire 2. The measuring end 2a passes through the detection tube 1 and extends into the flow channel A. The other two ends 212 of the two metal wires 21 form the connecting end 2b of the thermocouple wire 2. The connecting end 2b is used to be electrically connected to an external monitoring unit. The metal wires 21 are exposed at least in the portion inside the flow channel A.

[0043] It is understood that the thermocouple wire 2 is a specialized wire used to transmit thermocouple signals, primarily in temperature measurement systems. It connects the thermocouple sensor to a display instrument or recording device, transmitting the millivolt-level electrical signal generated by the thermocouple to the measuring device. The internal metal sensing wire of the thermocouple wire 2 is the core component of the thermocouple, composed of wires made of two different metals or alloys. These wires are welded or crimped to form a measuring end 2a (hot end) for sensing temperature changes. According to the Seebeck effect, when the ends of two different metal wires are at different temperatures, an electromotive force (voltage) is generated, thereby achieving temperature measurement.

[0044] In the embodiment of the utility model, the temperature measuring assembly 100 comprises a detection tube 1 and a thermocouple wire 2; the detection tube 1 is arranged on the oil pipe 200 and communicates with the oil pipe 200; the thermocouple wire 2 is arranged in the detection tube 1, the thermocouple wire 2 comprises two metal wires 21, two ends 211 of the two metal wires 21 are electrically connected to form a measuring end 2a of the thermocouple wire 2, other two ends 212 of the two metal wires 21 form a connecting end 2b of the thermocouple wire 2 for electrically connecting with an external monitoring unit, the measuring end 2a penetrates the detection tube 1 and extends into the flow channel A, and the temperature measuring principle of the above thermocouple wire 2 is known, the temperature difference between the measuring end 2a (hot end) and the connecting end 2b (cold end) will cause the electromotive force of the two ends of the thermocouple wire 2, so that temperature measurement is realized; therefore, the measuring end 2a for sensing temperature extends into the flow channel A and directly contacts the liquid in the flow channel A, so that the temperature change can also be quickly sensed when the liquid flow in the flow channel A is small or the temperature change is small, and then the detection delay problem is improved.

[0045] Meanwhile, the metal wire 21 of the thermocouple wire 2 is at least in a bare state in the part of the metal wire 21 in the flow channel A, that is to say, in the flow channel A, the metal wire 21 for sensing temperature directly contacts the liquid in the flow channel A, compared with the traditional temperature measuring element with a shell, the metal wire 21 directly contacts the liquid, can more accurately sense the temperature change of the liquid, and improves the sensitivity and accuracy of detection.

[0046] The application does not make specific limitation on the connection form of the detection tube 1 and the oil pipe 200.

[0047] In some embodiments, a hole is opened on the oil pipe 200, the detection tube 1 is arranged at the position of the hole and is welded and fixed with the oil pipe 200, so that the connection of the detection tube 1 and the oil pipe 200 is realized.

[0048] Please refer to Figure 1 and Figure 5 In another embodiment, the temperature measuring assembly 100 further comprises a tee pipe 3, the tee pipe 3 comprises a main pipe section 31 and a branch pipe section 32 arranged at an angle, the branch pipe section 32 is connected to the middle position of the main pipe section 31 and communicates with the main pipe section 31, the main pipe section 31 is connected to the oil pipe 200 and is used for forming the flow channel A together with the oil pipe 200; wherein the branch pipe section 32 forms the detection tube 1, and the thermocouple wire 2 is inserted into the branch pipe section 32.

[0049] In the embodiment, the tee pipe 3 is provided, which is a common pipe fitting mainly used for changing the direction of fluid or realizing the branching of pipe. The tee pipe 3 comprises a main pipe section 31 and a branch pipe section 32, the oil pipe 200 comprises a first pipe section 201 and a second pipe section 202, the main pipe section 31 connects the first pipe section 201 and the second pipe section 202 to jointly form a continuous flow channel A for the flow of liquid; the branch pipe section 32 communicates with the main pipe section 31, that is, with the flow channel A, the branch pipe section 32 of the tee pipe 3 is taken as the detection pipe 1, the thermocouple wire 2 is inserted into the branch pipe section 32, thereby constituting the temperature measuring assembly 100; in this way, the two ends of the main pipe section 31 are locked with the first pipe section 201 and the second pipe section 202 through threaded fastening structures, that is, the connection of the detection pipe 1 and the oil pipe 200 can be realized, which is simple in structure and easy to operate.

[0050] In order to improve the accuracy of the detection result of the temperature measuring assembly 100, when the thermocouple wire 2 is inserted into the branch pipe section 32, the measuring end 2a of the thermocouple wire 2 is spaced apart from the inner wall 311 of the main pipe section 31; that is, the measuring end 2a of the thermocouple wire 2 cannot touch the inner wall 311 of the main pipe section 31, thereby avoiding the heat transfer between the measuring end 2a and the main pipe section 31, and further ensuring the accuracy of temperature sensing of the measuring end 2a.

[0051] Please refer to Figure 2 and Figure 3 In an embodiment, the detection pipe 1 has two ports 11 arranged oppositely, one of which is arranged on the oil pipe 200 and communicates with the oil pipe 200; the temperature measuring assembly 100 further comprises a plugging piece 4, which is arranged on the other port 11 to seal the detection pipe 1, and two through holes 41 are arranged on the plugging piece 4 to communicate with the detection pipe 1; wherein the two metal wires 21 are respectively inserted into the detection pipe 1 from the two through holes 41.

[0052] In the embodiment, one port 11 of the detection pipe 1 is connected with the oil pipe 200; the plugging piece 4 is arranged on the other port 11 of the detection pipe 1, so as to seal the detection pipe 1. Meanwhile, the through hole 41 is arranged on the plugging piece 4, and the metal wire 21 is inserted into the detection pipe 1 from the through hole 41.

[0053] The structure of the plugging piece 4 is not limited in the application.

[0054] In an exemplary embodiment, the sealing member 4 comprises a cover 42 and a plug pipe 43, the cover 42 is arranged on the other port 11, the plug pipe 43 is arranged on one side of the cover 42 and is plugged into the other port 11, and the plug pipe 43 is in communication with the detection tube 1; wherein two through holes 41 are arranged on the cover 42 and are in communication with the plug pipe 43.

[0055] In the embodiment, the sealing member 4 is arranged as a pipe plug, which is a kind of accessory for closing the end of a pipe and is mainly used for preventing fluid leakage or protecting the inside of the pipe from being polluted by the outside. The sealing member 4 comprises a cover 42 for sealing and a plug pipe 43 for connection; the plug pipe 43 is plugged into the other port 11 of the detection tube 1 for connecting the sealing member 4 and the detection tube 1; when the plug pipe 43 is plugged into the other port 11, the cover 42 is arranged on the other port 11 to seal the other port 11 of the detection tube 1. In addition, the sealing member 4 can further comprise a sealing ring, which is sleeved on the plug pipe 43, and is used for enhancing the sealing performance to prevent fluid leakage.

[0056] In an exemplary embodiment, the temperature measuring assembly 100 further comprises a sealing glue 5 arranged in the plug pipe 43 to seal the through hole 41. It can be understood that two through holes 41 are arranged on the cover 42, and two metal wires 21 are respectively inserted into the detection tube 1 from the two through holes 41; generally, in order to ensure that the metal wires 21 are inserted smoothly, the inner wall 311 of the through hole 41 will not scratch the metal wires 21, and a gap will be arranged between the metal wires 21 and the through hole 41, and at this time, there is still a risk of fluid leakage or pollution of the environment in the pipe between the metal wires 21 and the through hole 41; the sealing glue 5 is arranged to seal the through hole 41, which can enhance the sealing performance to prevent fluid leakage.

[0057] At the same time, the sealing glue 5 arranged in the plug pipe 43 can also fix the metal wires 21 passing through the plug pipe 43, so as to avoid the metal wires 21 from shaking in the detection tube 1, thereby improving the stability of the thermocouple wire 2.

[0058] It can be known that the liquid in the flow channel A is not limited in the present application, and the liquid in the flow channel A can be cooling oil, water or ethylene glycol.

[0059] Since the detection tube 1 is in communication with the flow channel A in the oil pipe 200, the sealing glue 5 in the plugging member 4 needs to be insoluble with the liquid in the flow channel A. In an embodiment, the sealing glue 5 is provided as a silica gel glue, an epoxy resin glue, a polyurethane glue or a fluorine rubber glue.

[0060] As mentioned above, the sealing glue 5 is arranged to block the through hole 41, which can enhance the sealing performance and prevent fluid leakage. In an exemplary embodiment, referring to Figure 4 , the inner wall 311 of the plug-in pipe 43 is provided with a plurality of protrusions 44, and the outer wall 51 of the sealing glue 5 is provided with a plurality of recesses 52, each of which is in recess-protrusion cooperation with one of the protrusions 44. In this embodiment, by arranging the recess-protrusion cooperation structure between the inner wall 311 of the plug-in pipe 43 and the outer wall 51 of the sealing glue 5, the flow path when fluid leaks is prolonged, and the sealing performance of the sealing glue 5 is further enhanced to prevent fluid leakage.

[0061] Based on the temperature measurement principle of the thermocouple wire 2, the temperature difference between the measurement end 2a (hot end) and the connection end 2b (cold end) will generate an electromotive force at both ends of the thermocouple wire 2, thereby realizing temperature measurement. If the insertion depth of the thermocouple wire 2 in the detection tube 1 is small, the position of the measurement end 2a extending into the flow channel A is shallow, and when the liquid flow in the flow channel A is small, the measurement end 2a may not contact the liquid, thereby reducing the accuracy of sensing temperature. If the insertion depth of the thermocouple wire 2 in the detection tube 1 is large, the position of the measurement end 2a extending into the flow channel A is deep or even touches the inner wall A1 of the flow channel A, and at this time, heat transfer occurs between the measurement end 2a and the inner wall A1 of the flow channel A, so that the measurement end 2a is not simply in heat transfer with the liquid in the flow channel A, thereby reducing the accuracy of the measurement end 2a sensing temperature.

[0062] In an embodiment, referring to Figure 2 and Figure 3 , the temperature measurement assembly 100 further comprises a limiting portion 6, which is arranged on at least one of the metal wires 21, and is in limiting cooperation with the detection tube 1 to limit the insertion depth of the metal wire 21, so that the measurement end 2a is located at the geometric center position of the flow channel A.

[0063] In the embodiment, the limiting part 6 is arranged on the metal wire 21; when the metal wire 21 passes through the detection tube 1, the limiting part 6 on the metal wire 21 is in limiting cooperation with the detection tube 1, and at this time, the measuring end 2a of the thermocouple wire 2 is located at the geometric center position of the flow channel A; in this way, the insertion depth of the metal wire 21 is limited by arranging the limiting part 6, and the structure is simple; at the same time, the measuring end 2a is located at the geometric center position of the flow channel A by arranging the limiting part 6, which not only can reduce the risk that the measuring end 2a cannot contact the liquid, but also can avoid the measuring end 2a contacting the inner wall A1 of the flow channel A, thereby improving the temperature sensing accuracy of the measuring end 2a.

[0064] In an exemplary embodiment, the temperature measuring assembly 100 further comprises a sealing member 4 arranged at the port of the detection tube 1, the sealing member 4 is provided with two through holes 41 communicating with the detection tube 1, and the two metal wires 21 are respectively inserted into the detection tube 1 from the two through holes 41; the limiting part 6 comprises a limiting ring 61 sleeved outside the metal wire 21, and when the measuring end 2a is located at the geometric center position of the flow channel A, the limiting ring 61 abuts against the sealing member 4.

[0065] The application does not make specific limitations on the arrangement position of the limiting ring.

[0066] In some embodiments, two end portions 211 of the two metal wires 21 are first electrically connected to form the measuring end 2a of the thermocouple wire 2; then, the other two end portions 212 of the two metal wires 21 are respectively inserted through the through holes 41; at this time, the thermocouple wire 2 passes through the detection tube 1 from bottom to top, and the limiting ring 61 can be arranged on the side close to the measuring end 2a, and when the metal wire 21 is assembled, the upper end surface of the limiting ring 61 abuts against the lower end surface of the sealing member 4, thereby achieving limiting.

[0067] In another embodiment, two end portions 211 of the two metal wires 21 are first inserted through the through holes 41, and then the two end portions 211 of the two metal wires 21 are electrically connected to form the measuring end 2a of the thermocouple wire 2; at this time, the thermocouple wire 2 passes through the detection tube 1 from top to bottom, and the limiting ring 61 can be arranged on the side close to the connecting end 2b, and when the metal wire 21 is assembled, the lower end surface of the limiting ring 61 abuts against the upper end surface of the sealing member 4, thereby achieving limiting.

[0068] It can be known that, in order to improve the sensitivity and accuracy of detection, the metal wire 21 of the thermocouple wire 2 is arranged in a bare state at least at the portion thereof in the flow channel A, that is, the metal wire 21 is directly in contact with the liquid; however, if the metal wire 21 is arranged in a bare state throughout, the exposed metal wire 21 outside the detection tube 1 will be affected by the ambient temperature, thereby causing the temperature difference between the cold end and the hot end of the thermocouple wire 2 to fluctuate, and further causing the temperature measurement result of the thermocouple wire 2 to have errors.

[0069] In an embodiment, referring to Figure 2 and Figure 3 , the end portion of the metal wire 21 serving as the connecting end 2b is arranged outside the detection tube 1; the thermocouple wire 2 further comprises a protection tube 7, the protection tube 7 is sleeved outside the metal wire 21, the protection tube 7 extends along the length direction of the metal wire 21, and one end of the protection tube 7 is arranged flush with the end portion 212 of the metal wire 21 serving as the connecting end 2b, and the other end of the protection tube 7 stops at the port of the detection tube 1.

[0070] That is, the metal wire 21 is arranged in a bare state at the portion thereof in the flow channel A and in the detection tube 1, so as to improve the sensitivity and accuracy of detection of the thermocouple wire 2; meanwhile, the portion of the metal wire 21 outside the detection tube 1 is provided with the protection tube 7, the protection tube 7 is sleeved outside the metal wire 21, so as to protect the metal wire 21 from the external environment, and further improve the sensitivity and accuracy of detection of the thermocouple wire 2.

[0071] In an exemplary embodiment, referring to Figure 2 and Figure 3 , the temperature measurement assembly 100 further comprises a blocking piece 4 arranged at the port of the detection tube 1, the blocking piece 4 is provided with two through holes 41 communicating with the detection tube 1, two end portions 211 of the two metal wires 21 are respectively passed through the through holes 41, and the two end portions 211 of the two metal wires 21 are electrically connected to form the measurement end 2a of the thermocouple wire 2; that is, when the thermocouple wire 2 passes through the detection tube 1 from top to bottom, the protection tube 7 can also serve as the limiting ring 61, when the metal wire 21 is installed, the end portion 211 of the metal wire 21 is passed through the detection tube 1, the protection tube 7 abuts against the end face of the blocking piece 4, so as to limit the insertion depth of the metal wire 21, thereby causing the measurement end 2a to be located at the geometric center position of the flow channel A; in this way, the structure is simple, and the assembly is simple.

[0072] In a second aspect, the embodiment of the present application further provides a power system 1000. Referring to Figure 5The power system 1000 comprises an oil pipe 200 and a temperature measuring assembly 100; the oil pipe 200 is formed with a flow channel A for liquid flow; the temperature measuring assembly 100 comprises a detection pipe 1 and a thermocouple wire 2, the detection pipe 1 is arranged on the oil pipe 200 and communicates with the oil pipe 200, and the thermocouple wire 2 is inserted into the detection pipe 1, and a measuring end 2a of the thermocouple wire 2 penetrates through the detection pipe 1 and extends into the flow channel A.

[0073] It should be noted that the temperature measuring assembly 100 is the temperature measuring assembly 100 described above, that is, the temperature measuring assembly 100 has all the technical features of the temperature measuring assembly 100 described above, that is, the power system 1000 comprises all the embodiments of the temperature measuring assembly 100 described above.

[0074] That is, the thermocouple wire 2 comprises two metal wires 21, two ends 211 of the two metal wires 21 are electrically connected to form a measuring end 2a of the thermocouple wire 2, the measuring end 2a penetrates through the detection pipe 1 and extends into the flow channel A, and the other two ends 212 of the two metal wires 21 form a connecting end 2b of the thermocouple wire 2 for electrical connection with an external monitoring unit; by extending the measuring end 2a for sensing temperature into the flow channel A and directly contacting the liquid in the flow channel A, the temperature change can be quickly sensed when the liquid flow in the flow channel A is small or the temperature change is small, thereby improving the detection delay problem.

[0075] Meanwhile, the metal wires 21 of the thermocouple wire 2 are arranged in a bare state at least at the part in the flow channel A, that is, in the flow channel A, the metal wires 21 for temperature sensing directly contact the liquid in the flow channel A, compared with the traditional temperature measuring element with a shell, the metal wires 21 directly contact the liquid, which can more accurately sense the liquid temperature change and improve the sensitivity and accuracy of detection.

[0076] In an embodiment, please refer to Figure 5The three-way pipe 3 is a common pipe fitting, mainly used for changing the direction of fluid or realizing the branching of pipe. The three-way pipe 3 comprises a main pipe section 31 and a branch pipe section 32, the oil pipe 200 comprises a first pipe section 201 and a second pipe section 202, the main pipe section 31 connects the first pipe section 201 and the second pipe section 202 to jointly form a continuous flow channel A for liquid flow; the branch pipe section 32 communicates with the main pipe section 31, that is, communicates with the flow channel A, the branch pipe section 32 of the three-way pipe 3 is taken as the detection pipe 1, the thermocouple wire 2 is inserted into the branch pipe section 32, thereby constituting the temperature measuring assembly 100; in this way, the two ends of the main pipe section 31 are locked with the first pipe section 201 and the second pipe section 202 through a threaded fastening structure, that is, the connection of the detection pipe 1 and the oil pipe 200 can be realized, and the structure is simple and the operation is simple.

[0077] The above detailed the embodiments of the present application, and the principles and implementation modes of the present application are described by applying specific examples; the above embodiment description is only used to help understand the method and core idea of the present application; meanwhile, according to the idea of the present application, the specific implementation mode and application range will be changed by the person skilled in the art, and the above description should not be understood as the limitation of the present application.

Claims

1. A temperature measuring component for measuring the temperature of a liquid inside an oil pipe, wherein a flow channel for liquid circulation is formed inside the oil pipe, characterized in that, include: A detection tube, for being installed on and connected to the oil pipe; and, A thermocouple wire is disposed inside the detection tube. The thermocouple wire includes two metal wires. Two ends of the two metal wires are electrically connected to form the measuring end of the thermocouple wire. The measuring end passes through the detection tube and extends into the flow channel. The other two ends of the two metal wires form the connecting end of the thermocouple wire. The connecting end is used to electrically connect with an external monitoring unit. The metal wire is exposed at least in the portion within the flow channel.

2. The temperature measuring component according to claim 1, characterized in that, The temperature measuring component also includes a three-way pipe, which includes a main pipe section and a branch pipe section arranged at an angle. The branch pipe section is connected to the middle of the main pipe section and communicates with the main pipe section. The main pipe section is connected to the oil pipe and is used to form the flow channel together with the oil pipe. The branch pipe section forms the detection tube, and the thermocouple wire is inserted into the branch pipe section.

3. The temperature measuring component according to claim 2, characterized in that, The measuring end of the thermocouple wire is spaced apart from the inner wall of the main pipe section.

4. The temperature measuring component according to claim 1, characterized in that, The detection tube has two ports arranged opposite to each other, one of which is located on the oil pipe and communicates with the oil pipe; The temperature measuring component also includes a sealing element, which is covered on another of the ports to seal the detection tube. The sealing element has two through holes that communicate with the detection tube. The two metal wires are respectively inserted into the detection tube through the two through holes.

5. The temperature measuring component according to claim 4, characterized in that, The sealing component includes a cover and a connector. The cover is placed over the other port, and the connector is located on one side of the cover and inserted into the other port. The connector is connected to the detection tube. The two through holes are provided on the cover and are connected to the insertion tube.

6. The temperature measuring component according to claim 5, characterized in that, The temperature measuring component also includes a sealing colloid, which is disposed inside the insertion tube to seal the through hole.

7. The temperature measuring component according to claim 6, characterized in that, The sealing colloid is configured as silicone colloid, epoxy resin colloid, polyurethane colloid, or fluororubber colloid.

8. The temperature measuring component according to claim 6, characterized in that, The inner wall of the insertion tube has multiple protrusions, and correspondingly, the outer wall of the sealing colloid has multiple grooves, with each groove engaging with one of the protrusions.

9. The temperature measuring component according to any one of claims 2-8, characterized in that, The temperature measuring component also includes a limiting part, which is disposed on at least one of the metal lines. The limiting part and the detection tube are mutually limiting to limit the insertion depth of the metal line so that the measuring end is located at the geometric center of the flow channel.

10. The temperature measuring component according to claim 9, characterized in that, The temperature measuring component also includes a sealing member disposed at the port of the detection tube. The sealing member is provided with two through holes communicating with the detection tube, and the two metal wires are respectively inserted into the detection tube through the two through holes. The limiting part includes a limiting ring sleeved on the outside of the metal wire, and when the measuring end is at the geometric center of the flow channel, the limiting ring abuts against the sealing member.

11. The temperature measuring component according to claim 10, characterized in that, The limiting ring is positioned close to the connecting end, and the lower end face of the limiting ring abuts against the upper end face of the sealing member.

12. The temperature measuring component according to any one of claims 2-8, characterized in that, The end of the metal wire, serving as a connecting end, extends out of the detection tube; The thermocouple wire also includes a protective tube, which is sleeved on the outside of the metal wire. The protective tube extends along the length of the metal wire, and one end of the protective tube is flush with the end of the metal wire used as a connection end. The other end of the protective tube terminates at the port of the detection tube.

13. A power system, characterized in that, include: Oil pipe, which has flow channels formed within it for the flow of liquid; and, The temperature measuring component as described in any one of claims 1-12, the temperature measuring component includes a detection tube and a thermocouple wire, the detection tube is disposed on the oil pipe and communicates with the oil pipe, the thermocouple wire is inserted into the detection tube, and its measuring end passes through the detection tube and extends into the flow channel.

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