Temperature measuring assembly and temperature measuring device for fluid in pipeline

Abstract

The invention relates to the technical field of temperature measurement, and discloses a temperature measurement assembly and a temperature measurement device for fluid in a pipeline, the temperature measurement assembly comprises a protection pipe, an armored temperature measurement part, a lead and a vibration reduction elastic assembly, the protection pipe is provided with a pipe cavity extending in the length direction of the protection pipe, one end of the pipe cavity is set as a closed end, and the other end of the pipe cavity is set as an open end; the armored temperature measuring component is arranged in the tube cavity, one end of the lead is electrically connected with the armored temperature measuring component, the other end of the lead penetrates through the tube cavity in the length direction of the protection tube and is led out from the open end of the tube cavity, and the vibration reduction elastic assembly is arranged on the portion, located in the tube cavity, of the lead in a sleeved mode. The two ends of the vibration reduction elastic assembly are stopped at the opening end of the armored temperature measurement part and the opening end of the pipe cavity respectively, so that the end, close to the closed end, of the armored temperature measurement part abuts against the closed end, the temperature measurement assembly can decompose external vibration and reduce frequency, the vibration reduction effect is achieved, and then it is ensured that the temperature measurement element in the pipe cavity can work normally.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature measurement, in particular to a temperature measurement assembly and a temperature measurement device for fluid in a pipeline. BACKGROUND

[0002] The working principle of the armored temperature measurement component is to measure the temperature by using the characteristic that the resistance of the thermal resistance element changes when the temperature changes. In some special application scenarios, such as high flow rate pipelines, variable diameter pipelines, turning pipelines or pump outlets, external vibration is large, which can easily cause the temperature measurement element (thermal resistance element) in the armored temperature measurement component to break, at this time the temperature will be displayed as the maximum value, thereby triggering the high temperature interlock and causing the device to shut down. SUMMARY

[0003] The purpose of the present application is to solve the problem that external vibration can easily cause the temperature measurement element in the armored temperature measurement component to break, and to provide a temperature measurement assembly and a temperature measurement device for fluid in a pipeline, which can significantly reduce the impact of external vibration on the temperature measurement element and ensure that the temperature measurement element can work normally.

[0004] In order to achieve the above purpose, the present application provides a temperature measurement assembly, which comprises:

[0005] A protective tube having a tube cavity extending along the length direction thereof, one end of the tube cavity being provided as a closed end and the other end being provided as an open end;

[0006] An armored temperature measurement component arranged in the tube cavity;

[0007] A lead wire, one end of the lead wire being electrically connected to the armored temperature measurement component, the other end of the lead wire passing through the tube cavity along the length direction of the protective tube and being led out from the open end of the tube cavity; and

[0008] A vibration reduction elastic assembly, the vibration reduction elastic assembly being sleeved on the portion of the lead wire located in the tube cavity, both ends of the vibration reduction elastic assembly being respectively stopped at the armored temperature measurement component and the open end of the tube cavity, so that the end portion of the armored temperature measurement component close to the closed end abuts against the closed end.

[0009] Optionally, the vibration reduction elastic assembly comprises a plurality of metal bellows, the plurality of metal bellows being sleeved on the portion of the lead wire located in the tube cavity, two adjacent metal bellows being connected by a silicone rubber sleeve, the silicone rubber sleeve being sleeved on the lead wire.

[0010] Optionally, the length of each metal bellows is 25-35mm.

[0011] The length of each silicone rubber sleeve is 15-25mm.

[0012] Optionally, a metal sheath is fixed at the open end of the tube cavity, the metal sheath is arranged along the length direction of the protection tube, an internal passage is arranged through both ends of the metal sheath for the lead wire to pass through, and the end of the damping elastic assembly close to the open end of the tube cavity abuts against the metal sheath.

[0013] Optionally, a step part is arranged at the position close to the open end of the tube cavity, a hollow bolt capable of being screwed and fixed in the tube cavity is arranged between the step part and the open end, a limiting ring is arranged at the end of the metal sheath away from the damping elastic assembly, the limiting ring is arranged on the same center line with the metal sheath and is locked to the step part by the hollow bolt.

[0014] Optionally, a connecting tube is fixed at the end of the metal sheath away from the damping elastic assembly, the connecting tube extends outward along the length direction of the protection tube, and a connecting piece is arranged at the end of the connecting tube away from the open end for connecting a junction box.

[0015] Optionally, the armored temperature measuring component is arranged in the tube cavity along the length direction of the protection tube, the armored temperature measuring component has an inner end close to the closed end and an outer end away from the closed end, a limiting component, a first damping component and a second damping component are arranged on the armored temperature measuring component in sequence from the direction of the outer end to the inner end, the limiting component is fixed on the outer side surface of the armored temperature measuring component, the first damping component is arranged to be capable of freely moving along the length direction of the armored temperature measuring component, the second damping component is fixed at the inner end of the armored temperature measuring component, and elastic elements are arranged between the limiting component and the first damping component and between the first damping component and the second damping component.

[0016] Optionally, the armored temperature measuring component is further provided with a protective sleeve arranged along the length direction thereof, the protective sleeve has a containing cavity for containing the limiting component, the first damping component and the elastic elements.

[0017] Another aspect of the present application provides a temperature measuring device for fluid in a pipeline, the temperature measuring device has the temperature measuring assembly described above, and the protection tube is inserted into the pipeline to enable the temperature of the fluid in the pipeline to be measured by the armored temperature measuring component.

[0018] Optionally, the pipeline is provided with a mounting branch pipe capable of communicating with the pipeline, and the mounting branch pipe is used for mounting and fixing the protection tube.

[0019] By the technical scheme, the two ends of the damping elastic assembly are respectively stopped at the armored temperature measuring part and the open end of the lumen, so that the end of the armored temperature measuring part close to the closed end abuts against the closed end. Due to the flexible characteristics of the lead wire, the damping elastic assembly sleeved on the lead wire is in irregular point contact with the inner wall of the lumen, when external vibration is transmitted to the armored temperature measuring part through the protective tube, the damping elastic assembly can decompose and reduce the frequency of the external vibration, so as to achieve the damping effect, and further ensure that the temperature measuring element in the lumen can work normally. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is an explosion schematic view of a temperature measuring assembly provided by the present application;

[0021] Figure 2 is a schematic view of the relative positions of a metal protective tube, a connecting tube and a hollow bolt provided by the present application;

[0022] Figure 3 is a schematic view of a temperature measuring device for fluid in a pipeline provided by the present application.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 10, protective tube; 11, lumen; 111, closed end; 112, open end; 113, step portion; 12, second flange; 13, sealing gasket; 20, armored temperature measuring part; 201, inner end; 202, outer end; 21, limiting part; 22, first damping part; 23, second damping part; 24, elastic element; 25, protective sleeve; 251, accommodating cavity; 30, lead wire; 40, damping elastic assembly; 41, metal bellow; 42, silicone rubber sleeve; 50, metal protective tube; 51, limiting ring; 60, hollow bolt; 70, connecting tube; 71, connecting part; 80, pipeline; 81, mounting branch pipe; 811, first flange. DETAILED DESCRIPTION

[0025] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0026] In combination with Figure 1 The first aspect of the present application provides a temperature measuring assembly, which comprises a protective tube 10, an armored temperature measuring part 20, a lead wire 30 and a damping elastic assembly 40.

[0027] The protective tube 10 has a lumen 11 extending along the length direction thereof, one end of the lumen 11 is provided as a closed end 111, and the other end is provided as an open end 112; the armored temperature measuring component 20 is arranged in the lumen 11; one end of the lead wire 30 is electrically connected with the armored temperature measuring component 20, and the other end of the lead wire 30 passes through the lumen 11 along the length direction of the protective tube 10 and is led out from the open end 112 of the lumen 11; the damping elastic assembly 40 is sleeved on the part of the lead wire 30 located in the lumen 11, and the two ends of the damping elastic assembly 40 are respectively stopped at the armored temperature measuring component 20 and the open end 112 of the lumen 11, so that the end of the armored temperature measuring component 20 close to the closed end 111 abuts against the closed end 111.

[0028] In the technical scheme provided by the present application, the damping elastic assembly 40 is sleeved on the part of the lead wire 30 located in the lumen 11, and the two ends of the damping elastic assembly 40 are respectively stopped at the armored temperature measuring component 20 and the open end 112 of the lumen 11, so that the end of the armored temperature measuring component 20 close to the closed end 111 abuts against the closed end 111. It can be understood that the damping elastic assembly 40 provides elastic force to make the end of the armored temperature measuring component 20 close to the closed end 111 abut against the closed end 111, and due to the flexible characteristics of the lead wire 30, the damping elastic assembly 40 sleeved on the lead wire 30 is in irregular point contact with the inner wall of the lumen 11, when external vibration is transmitted to the armored temperature measuring component 20 through the protective tube 10, the damping elastic assembly 40 can decompose and reduce the frequency of the external vibration, so as to achieve the effect of damping, and further ensure that the armored temperature measuring component 20 in the lumen 11 can work normally.

[0029] The armored temperature measuring component 20 provided by the present application can be common in the prior art, and the shell thereof is generally cylindrical, and the thermistor element is fixed and sealed in the shell by high-temperature sealing glue.

[0030] It should be noted that the present application does not specially limit the type of the temperature measuring element, for example, it can be a double-branch thermistor, or a single-branch or double-branch thermocouple.

[0031] In some embodiments, the damping elastic assembly 40 includes a plurality of metal bellows 41, the plurality of metal bellows 41 are sleeved on the part of the lead wire 30 located in the lumen 11, adjacent two metal bellows 41 are connected by a silicone rubber sleeve 42, and the silicone rubber sleeve 42 is sleeved on the lead wire 30.

[0032] The inventors of the present application find that if the portion of the lead wire 30 located in the lumen 11 is only sleeved with a metal bellow 41, external vibration will be directly transmitted along the metal bellow 41 after entering the lumen 11 of the protection tube 10, resulting in poor damping effect and failing to well protect the armored temperature measuring component 20; if the portion of the lead wire 30 located in the lumen 11 is only sleeved with a silicone rubber sleeve 42, the relatively soft characteristic of the silicone rubber sleeve 42 will cause the armored temperature measuring component 20 to be difficult to extend into the closed end 111 of the lumen 11.

[0033] According to the technical solution provided by the present application, the two adjacent metal bellows 41 are connected by the silicone rubber sleeve 42, which not only enables the entire damping elastic assembly 40 to be easily inserted into the lumen 11, but also significantly improves the decomposition and frequency reduction effect of the temperature measuring assembly on external vibration, effectively avoiding the adverse effect of external vibration on the armored temperature measuring component 20 in the lumen 11.

[0034] It should be noted that in the present application, the lengths of the metal bellows 41 and the silicone rubber sleeve 42 can be selected within a wide range, and in some embodiments, the length of each metal bellow 41 is 25-35 mm, and the length of each silicone rubber sleeve 42 is 15-25 mm. As a preferred embodiment, the length of each metal bellow 41 is 30 mm, and the length of each silicone rubber sleeve 42 is 20 mm.

[0035] In the present application, as a specific embodiment in which one end of the damping elastic assembly 40 is stopped at the open end 112 of the lumen 11, a metal protective tube 50 is fixed to the open end 112 of the lumen 11, the metal protective tube 50 is arranged along the length direction of the protection tube 10, an internal passage is provided in the metal protective tube 50 and extends through both ends thereof for the lead wire 30 to pass through, and the end of the damping elastic assembly 40 close to the open end 112 of the lumen 11 abuts against the metal protective tube 50.

[0036] It should be noted that the metal protective tube 50 can be fixed to the open end 112 of the lumen 11 in any appropriate form, and in some embodiments, the metal protective tube 50 is fixed to the open end 112 of the lumen 11 by means of a hollow bolt 60. Figure 2 As shown in the drawings, a step portion 113 is arranged at a position close to the open end 112 of the lumen 11, a hollow bolt 60 capable of being screwed and fixed in the lumen 11 is arranged between the step portion 113 and the open end 112, a limiting ring 51 is arranged at an end of the metal protective tube 50 away from the damping elastic assembly 40, the limiting ring 51 is coaxially arranged with the metal protective tube 50 and is locked to the step portion 113 by the hollow bolt 60.

[0037] In some embodiments, the metal sheath pipe 50 is fixed with a connecting pipe 70 at one end away from the damping elastic assembly 40, the connecting pipe 70 extends outward along the length direction of the protection pipe 10, and the connecting pipe 70 is provided with a connecting piece 71 at one end away from the open end 112 for connecting a terminal box. Exemplarily, the connecting piece 71 is a hollow tubular connecting bolt which is coaxial with the connecting pipe 70 to allow the lead wire 30 to pass through, and the connecting bolt is screwed to the terminal box.

[0038] It can be understood that the outer diameter of the connecting pipe 70 is smaller than the inner diameter of the hollow bolt 60, so that the hollow bolt 60 can be screwed into the lumen 11, thereby locking the limiting ring 51 on the metal sheath pipe 50 to the stepped portion 113. By providing the connecting pipe 70, the lead wire 30 can be conveniently extended outward, and connection with other components can be facilitated.

[0039] In some embodiments, the armored temperature measuring component 20 is arranged in the lumen 11 along the length direction of the protection pipe 10, the armored temperature measuring component 20 has an inner end 201 close to the closed end 111 and an outer end 202 away from the closed end 111, and the armored temperature measuring component 20 is provided with a limiting component 21, a first damping component 22 and a second damping component 23 arranged in sequence from the outer end 202 toward the inner end 201, the limiting component 21 is fixed on the outer side surface of the armored temperature measuring component 20, the first damping component 22 is arranged to be freely movable along the length direction of the armored temperature measuring component 20, and the second damping component 23 is fixed on the inner end 201 of the armored temperature measuring component 20, and elastic elements 24 are arranged between the limiting component 21 and the first damping component 22 and between the first damping component 22 and the second damping component 23.

[0040] In the present application, the first damping component 22 can extrude the elastic elements 24 on both sides thereof when receiving external vibration, thereby gradually dissipating the energy of external vibration and avoiding adverse effects on the armored temperature measuring component 20 in the lumen 11.

[0041] In some embodiments, the armored temperature measuring component 20 is further provided with a protective sleeve 25 arranged along the length direction thereof, and the protective sleeve 25 has a receiving cavity 251 for accommodating the limiting component 21, the first damping component 22 and the elastic elements 24.

[0042] In combination Figure 3 As shown, the second aspect of the present application provides a temperature measuring device for fluid in a pipeline, the temperature measuring device has the temperature measuring assembly described above, and the protection pipe 10 is inserted into the pipeline 80 to measure the temperature of fluid in the pipeline 80 by the armored temperature measuring component 20.

[0043] It should be noted that in the present application, the protection pipe 10 can be fixed to the pipeline 80 in any appropriate form and keep its depth inserted into the pipeline 80, in some embodiments, the pipeline 80 is provided with a mounting branch pipe 81 capable of communicating with the pipeline 80, and the mounting branch pipe 81 is used to mount and fix the protection pipe 10.

[0044] Exemplarily, the mounting branch pipe 81 is provided with a first flange 811 extending radially outwardly therefrom, and the protection pipe 10 is provided with a second flange 12 extending radially outwardly therefrom, and the second flange 12 is locked and fixed with the first flange 811 by a plurality of bolts; as preferably, in order to prevent the fluid in the pipeline 80 from leaking outwardly through the gap between the protection pipe 10 and the mounting branch pipe 81, a sealing gasket 13 is further provided between the second flange 12 and the first flange 811.

[0045] The inventor of the present application finds that in high flow rate pipelines, variable diameter pipelines, turning pipelines or pump outlets, due to large vibration, the temperature measuring element (thermal resistance element) in the armored temperature measuring part 20 is prone to breakage, at this time the temperature will be displayed as the maximum value, and then trigger the high temperature interlock, causing the device to shut down. The temperature measuring device provided by the present application effectively decomposes, reduces the frequency and damps the external vibration, effectively avoids the problem of breakage of the temperature measuring element caused by external vibration, and ensures the reliability of the temperature measuring device.

[0046] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited thereto. Within the technical concept range of the present application, various simple modifications can be made to the technical solutions of the present application, in order to avoid unnecessary repetition, the present application will not be described again for various possible combination manners. However, these simple modifications and combinations should also be regarded as the disclosed content of the present application, and all belong to the protection range of the present application.

Claims

1. A temperature measuring assembly, characterized by The utility model relates to a kind of temperature measuring protection tube, including: Protective tube (10), the protective tube (10) has lumen (11) extending along its length direction, one end of the lumen (11) is provided as closed end (111), the other end is provided as open end (112); Armoured temperature measuring component (20), the armoured temperature measuring component (20) is arranged in the lumen (11); Lead wire (30), one end of the lead wire (30) is electrically connected with the armoured temperature measuring component (20), the other end passes through the lumen (11) along the length direction of the protective tube (10) and is led out from the open end (112) of the lumen (11);And Damping elastic component (40), the damping elastic component (40) is sleeved in the part of the lead wire (30) located in the lumen (11), two ends of the damping elastic component (40) are stopped in the armoured temperature measuring component (20) and the open end (112) of the lumen (11) respectively, so that the end of the armoured temperature measuring component (20) close to the closed end (111) is abutted on the closed end (111).

2. The temperature measurement assembly of claim 1, wherein, The damping elastic component (40) includes a plurality of metal bellows (41), the plurality of metal bellows (41) are sleeved in the part of the lead wire (30) located in the lumen (11), two adjacent metal bellows (41) are connected by silicone rubber sleeve (42), and the silicone rubber sleeve (42) is sleeved on the lead wire (30).

3. The temperature measurement assembly of claim 2, wherein, The length of each metal bellows (41) is 25-35mm; The length of each silicone rubber sleeve (42) is 15-25mm.

4. The temperature measurement assembly of claim 1, wherein, The open end (112) of the lumen (11) is fixed with metal protective tube (50), the metal protective tube (50) is arranged along the length direction of the protective tube (10), the metal protective tube (50) is provided with internal passage passing through both ends thereof for the lead wire (30) to pass through, and the end of the damping elastic component (40) close to the open end (112) of the lumen (11) is abutted on the metal protective tube (50).

5. The temperature measurement assembly of claim 4, wherein, The lumen (11) is provided with step portion (113) close to the open end (112) thereof, the hollow bolt (60) capable of being screwed and fixed in the lumen (11) is arranged between the step portion (113) and the open end (112), one end of the metal protective tube (50) away from the damping elastic component (40) is provided with limiting ring (51), the limiting ring (51) is arranged coaxially with the metal protective tube (50) and is locked to the step portion (113) by the hollow bolt (60).

6. The temperature measurement assembly of claim 5, wherein, One end of the metal protective tube (50) away from the damping elastic component (40) is fixed with connecting pipe (70), the connecting pipe (70) extends outward along the length direction of the protective tube (10), and the connecting pipe (70) is provided with connecting piece (71) at one end away from the open end (112) for connecting terminal box.

7. The temperature measurement assembly of any of claims 1-6, wherein, The armored temperature measuring component (20) is arranged in the lumen (11) along the length direction of the protection tube (10), the armored temperature measuring component (20) has an inner end (201) close to the closed end (111) and an outer end (202) away from the closed end (111), the armored temperature measuring component (20) is provided with a limiting component (21), a first damping member (22) and a second damping member (23) arranged in sequence from the direction of the outer end (202) to the inner end (201), the limiting component (21) is fixed on the outer side surface of the armored temperature measuring component (20), the first damping member (22) is arranged to be freely movable along the length direction of the armored temperature measuring component (20), the second damping member (23) is fixed on the inner end (201) of the armored temperature measuring component (20), and the limiting component (21) and the first damping member (22) and the first damping member (22) and the second damping member (23) are provided with elastic elements (24).

8. The temperature measurement assembly of claim 7, wherein, The armored temperature measuring component (20) is further provided with a protective sleeve (25) arranged along the length direction thereof, the protective sleeve (25) has a containing cavity (251) for containing the limiting component (21), the first damping member (22) and the elastic element (24).

9. A temperature measuring device for a fluid in a pipe, characterized by The temperature measuring device has the temperature measuring assembly of any one of claims 1-8, and the protection tube (10) is inserted into a pipeline (80) to measure the temperature of the fluid in the pipeline (80) through the armored temperature measuring component (20).

10. The temperature measuring device for a fluid in a pipe according to claim 9, wherein The pipeline (80) is provided with a mounting branch pipe (81) capable of communicating with the pipeline (80), and the mounting branch pipe (81) is used for mounting and fixing the protection tube (10).

Images