Galvanic couple fixing structure

Abstract

The utility model relates to the technical field of thermocouples, in particular to a galvanic couple fixing structure, which comprises a fixing seat suitable for being fixedly arranged with external equipment; the two groups of fixing assemblies are symmetrically arranged on the fixing seat respectively; the two fixing assemblies are movably arranged on the fixing base. The clamping ends of the two fixing assemblies face each other, and the fixing assemblies have a fixing state in which the clamping ends abut against and clamp the thermocouple ceramic tube so as to fix the thermocouple ceramic tube on the process tube and a separating state in which the clamping ends are separated from the thermocouple ceramic tube. The technical problem that the service life is affected due to the fact that the ceramic tube on the outer side of the thermocouple abuts against the inner wall of the mounting hole to be damaged due to lateral acting force in the fixing mode of an existing fixing structure is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, in particular to a thermocouple fixing structure. Background Art

[0002] Thermocouple is a commonly used temperature measuring element in temperature measuring instruments. It directly measures temperature and converts temperature signals into thermoelectric potential signals, which are then converted into the temperature of the measured medium through electrical instruments (secondary instruments). Thermocouples are usually inserted into the mounting holes on the process pipes and fixed through fixed structures to detect the temperature of the process pipes. Ceramic tubes are usually required to protect the thermocouples.

[0003] Existing fixed structures such as Figure 1 and Figure 2 As shown, it usually includes a fixing ring 1, a support seat 2 and a pull rod 3. The pull rod 3 is movably arranged on the support seat 2 in the vertical direction. After the thermocouple 4 is inserted into the process pipe 8, it is sleeved on the ceramic tube outside the thermocouple 4 through the fixing ring 1, and the pull rod 3 applies a downward force so that the ceramic tube is subjected to a lateral force, so that the ceramic tube abuts against the inner wall of the mounting hole, and then the thermocouple 4 is fixed on the process pipe 8. However, this fixing method easily causes the ceramic tube outside the thermocouple 4 to be damaged due to the abutment with the inner wall of the mounting hole by the lateral force, thereby affecting the service life. Utility Model Content

[0004] The utility model provides a thermocouple fixing structure, which solves the technical problem that the fixing method of the existing fixing structure easily causes the ceramic tube outside the thermocouple to abut against the inner wall of the installation hole due to lateral force, thus affecting the service life.

[0005] In view of this, the utility model provides a galvanic couple fixing structure, comprising:

[0006] A fixing seat, suitable for fixing with external equipment;

[0007] Two groups of fixing components are symmetrically arranged on the fixing base respectively; the two groups of fixing components are movably arranged on the fixing base; the clamping ends of the two groups of fixing components are arranged toward each other, and have a fixed state of abutting and clamping the thermocouple ceramic tube to fix it on the process tube, and a separated state of being separated from the thermocouple ceramic tube.

[0008] Optionally, the fixing assembly includes a clamping block and a telescopic driving member; the telescopic driving member is movably arranged in connection with the fixing seat, and the clamping block is connected to one end of the two telescopic driving members facing each other; the two clamping blocks have a fixed state in which they abut and clamp the thermocouple ceramic tube under the action of the telescopic driving member, and a separated state in which they are separated from the thermocouple ceramic tube under the action of the telescopic driving member.

[0009] Optionally, the telescopic driving member includes a support rod and a telescopic spring;

[0010] The fixing seat comprises two symmetrically arranged fixing plates, each of which is provided with a set of fixing components;

[0011] The support rod is movably inserted into the fixed plate along its axial direction; one end of the support rod is connected to the clamping block, and the other end is connected to a limiting portion for abutting the fixed plate; the telescopic spring is sleeved on the support rod, and the two ends of the telescopic spring abut the clamping block and the fixed plate respectively.

[0012] Optionally, at least one of the clamping blocks is provided with a clamping groove on an end surface facing the thermocouple ceramic tube, and a shape of the clamping groove is adapted to the outer circumference of the thermocouple ceramic tube.

[0013] Optionally, the clamping groove is provided on the end surface of one end of the two clamping blocks facing the thermocouple ceramic tube.

[0014] Optionally, the clamping block is a ceramic clamping block.

[0015] Optionally, the two groups of fixing components are symmetrically arranged along the vertical direction, and the clamping ends of the two groups of fixing components clamp the thermocouple ceramic tube along the vertical direction.

[0016] Optionally, the two groups of fixing components are symmetrically arranged in the horizontal direction, and the clamping ends of the two groups of fixing components clamp the thermocouple ceramic tube in the horizontal direction.

[0017] The technical solution of the utility model has the following advantages:

[0018] In the utility model, when it is necessary to fix the thermocouple ceramic tube to the process tube, firstly, the clamping ends of the two groups of the fixing components are adjusted to a separated state, that is, the two groups of the fixing components are moved in directions away from each other, and at the same time, the thermocouple ceramic tube is inserted into the mounting hole on the process tube along the axial direction perpendicular to the process tube, and then the clamping ends of the two groups of the fixing components are adjusted to a fixed state, that is, the two groups of the fixing components are moved in directions approaching each other, so that the clamping ends of the two groups of the fixing components symmetrically clamp the thermocouple ceramic tube on both sides of the thermocouple ceramic tube, and the thermocouple ceramic tube is fixed on the process tube along the axial direction perpendicular to the process tube. By clamping the thermocouple ceramic tube by the symmetrically arranged fixing components, the force on the thermocouple ceramic tube is balanced, the stability is improved, the damage caused by the abutment of the thermocouple ceramic tube with the inner wall of the mounting hole is avoided, and the service life is improved. Since the force applied by the clamping ends of the two groups of fixing components is evenly distributed on both sides of the thermocouple ceramic tube, even if the thermocouple ceramic tube expands due to heat, it will not cause deviation in the force on both sides, and the thermocouple ceramic tube is not easy to shift in the installation hole, thereby ensuring the verticality of the thermocouple ceramic tube and the process tube, thereby ensuring the accuracy of temperature detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the fixing structure of the prior art at a first viewing angle;

[0021] Figure 2 It is a structural schematic diagram of the fixing structure of the prior art at a second viewing angle;

[0022] Figure 3 A schematic diagram of the structure of two sets of fixing components provided by the utility model arranged in the vertical direction at a first viewing angle;

[0023] Figure 4 This is a schematic structural diagram of two groups of fixing components provided by the utility model arranged in the horizontal direction at a second viewing angle.

[0024] Description of reference numerals:

[0025] 1. Fixing ring; 2. Support seat; 3. Pull rod; 4. Thermocouple; 5. Fixing seat; 6. Fixing assembly; 61. Clamping block; 62. Support rod; 63. Telescopic spring; 64. Limiting part; 7. Thermocouple ceramic tube; 8. Process tube. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] See also Figure 3 and Figure 4 This embodiment provides a thermocouple fixing structure, including: a fixing base 5, suitable for fixing with an external device; two groups of fixing components 6, respectively and symmetrically arranged on the fixing base 5; the two groups of fixing components 6 are movably arranged on the fixing base 5; the clamping ends of the two groups of fixing components 6 are arranged toward each other, and have a fixed state of abutting and clamping the thermocouple ceramic tube 7 to fix it on the process tube 8, and a separated state of being separated from the thermocouple ceramic tube 7.

[0032] It should be noted that the clamping ends of the two fixing components 6 are oriented perpendicular to the axial direction of the thermocouple ceramic tube 7; a mounting hole for mounting the thermocouple ceramic tube 7 is provided on the process tube 8; the fixing seat 5 can be fixed on the process tube 8 or other external equipment; and a thermocouple 4 for detecting temperature is provided inside the thermocouple ceramic tube 7.

[0033] In this embodiment, when it is necessary to fix the thermocouple ceramic tube 7 to the process tube 8, the clamping ends of the two groups of fixing components 6 are first adjusted to a separated state, that is, the two groups of fixing components 6 are moved in a direction away from each other, and at the same time, the thermocouple ceramic tube 7 is inserted into the mounting hole on the process tube 8 in a direction perpendicular to the axial direction of the process tube 8. Then, the clamping ends of the two groups of fixing components 6 are adjusted to a fixed state, that is, the two groups of fixing components 6 are moved in a direction approaching each other, so that the clamping ends of the two groups of fixing components 6 symmetrically clamp the thermocouple ceramic tube 7 on both sides of the thermocouple ceramic tube 7, and the thermocouple ceramic tube 7 is fixed on the process tube 8 in a direction perpendicular to the axial direction of the process tube 8. The thermocouple ceramic tube 7 is clamped by the symmetrically arranged fixing components 6, so that the force on the thermocouple ceramic tube 7 is balanced, the stability is improved, the damage caused by the abutment of the thermocouple ceramic tube 7 with the inner wall of the mounting hole is avoided, and the service life is improved. Since the force applied by the clamping ends of the two sets of fixing components 6 is evenly distributed on both sides of the thermocouple ceramic tube 7, even if the thermocouple ceramic tube 7 expands due to heat, it will not cause deviation in the force on both sides, and the thermocouple ceramic tube 7 is not easy to shift in the installation hole, thereby ensuring the verticality of the thermocouple ceramic tube 7 and the process tube 8, thereby ensuring the accuracy of temperature detection.

[0034] Example 2

[0035] As a further improvement to Example 1, Figure 3 and Figure 4 As shown, the fixing assembly 6 includes a clamping block 61 and a telescopic driving member; the telescopic driving member is movably arranged on the fixing seat 5, and the clamping block 61 is connected to one end of the two telescopic driving members facing each other; the two clamping blocks 61 have a fixed state in which they abut and clamp the thermocouple ceramic tube 7 under the action of the telescopic driving member, and a separated state in which they are separated from the thermocouple ceramic tube 7 under the action of the telescopic driving member.

[0036] In this embodiment, the two clamping blocks 61 are moved closer to or farther away from each other under the action of the telescopic driving member, thereby realizing the adjustment of the fixed state and the separated state, and realizing the fixing, installation and disassembly of the thermocouple ceramic tube 7, which is convenient and fast, and ensures the verticality of the thermocouple ceramic tube 7 and the process tube 8 during operation, thereby ensuring the accuracy of temperature detection.

[0037] Based on the above implementation, in a specific implementation, as Figure 3 and Figure 4As shown, the telescopic drive member includes a support rod 62 and a telescopic spring 63; the fixed seat 5 includes two symmetrically arranged fixed plates, each of which is provided with a group of fixed components 6; the support rod 62 movably passes through the fixed plate along its axial direction; one end of the support rod 62 is connected to the clamping block 61, and the other end is connected to a limiting portion 64 for abutting the fixed plate; the telescopic spring 63 is sleeved on the support rod 62, and the two ends of the telescopic spring 63 respectively abut the clamping block 61 and the fixed plate.

[0038] It should be noted that the two fixing plates are arranged in parallel and symmetrically on both sides of the thermocouple ceramic tube 7 ; the support rod 62 is perpendicular to the thermocouple ceramic tube 7 .

[0039] In this embodiment, two fixing plates are provided, and two groups of fixing components 6 are symmetrically provided on the two fixing plates, so as to facilitate supporting the fixing components 6. By movably passing the support rod 62 through the fixing plate, it is convenient to drive the clamping block 61 to move through the support rod 62. Before installing the thermocouple ceramic tube 7, the support rod 62 is pulled by an external force (which can be a manual force or a driving force of an existing linear drive device) to drive it to move away from the thermocouple ceramic tube 7, so that a space for placing the thermocouple ceramic tube 7 is formed between the two clamping blocks 61, so as to facilitate installing the thermocouple ceramic tube 7. At this time, the telescopic spring 63 is in a compressed state. After the thermocouple ceramic tube 7 is inserted into the process tube 8, the force applied to the support rod 62 is released. Under the elastic force of the telescopic spring 63, the support rod 62 It drives the thermocouple ceramic tube 7 to move toward the direction close to the thermocouple ceramic tube 7, and then abuts against and clamps the thermocouple ceramic tube 7, and maintains a fixed state under the elastic force of the telescopic spring 63. When the thermocouple ceramic tube 7 and the clamping block 61 expand due to heat, the interaction between the two causes wear, or after cooling, the two shrink and cause a gap. The compression or extension of the telescopic spring 63 offsets the above-mentioned effects of the thermal contraction and deformation between the thermocouple ceramic tube 7 and the clamping block 61, so that the two clamping blocks 61 always abut and clamp the thermocouple ceramic tube 7, avoiding the gap or expansion wear caused by the contraction of the clamping block 61 and the thermocouple ceramic tube 7, and having adaptive adjustment performance. In addition, the limiting portion 64 can abut against the fixed plate to limit the support rod 62, so as to avoid the support rod 62 moving too far and causing the support rod 62 to detach from the fixed plate.

[0040] Based on the above implementation, in a specific implementation, as Figure 3 and Figure 4 As shown, at least one clamping block 61 is provided with a clamping groove on one end surface facing the thermocouple ceramic tube 7 , and the shape of the clamping groove is adapted to the outer circumference of the thermocouple ceramic tube 7 .

[0041] In this embodiment, the thermocouple ceramic tube 7 is clamped by providing a clamping groove adapted to the thermocouple ceramic tube 7 on the clamping block 61, thereby further improving the stability of fixing the thermocouple ceramic tube 7.

[0042] Based on the above implementation, in a specific implementation, as Figure 3 to Figure 4 As shown, the end surfaces of the two clamping blocks 61 facing the thermocouple ceramic tube 7 are both provided with clamping grooves.

[0043] In this embodiment, clamping grooves are provided on both clamping blocks 61 to improve the force balance and stability during fixation, and ensure the verticality of the thermocouple ceramic tube 7 and the process tube 8.

[0044] Based on the above implementation, in a specific implementation, as Figure 3 and Figure 4 As shown, the clamping block 61 is a ceramic clamping block.

[0045] In this embodiment, the clamping block 61 is a ceramic clamping block, so that the ceramic clamping block and the thermocouple ceramic tube 7 are made of the same material and have the same expansion coefficient. Therefore, when heated, the two can maintain the same change, thereby ensuring balanced force and avoiding force deviation on both sides of the thermocouple ceramic tube 7, which leads to poor verticality.

[0046] Based on the above implementation, in a specific implementation, as Figure 4 As shown, the two groups of fixing components 6 are symmetrically arranged in the horizontal direction, and the clamping ends of the two groups of fixing components 6 clamp the thermocouple ceramic tube 7 in the horizontal direction.

[0047] In this embodiment, the two sets of fixing components 6 are arranged horizontally to prevent the clamping ends of the two sets of fixing components 6 from being subjected to gravity, resulting in deviation of the force acting on both sides of the thermocouple ceramic tube 7, thereby affecting the verticality of the thermocouple ceramic tube 7 and the process tube 8.

[0048] Specifically, the two support rods 62 are horizontally arranged and penetrate the fixed plate movably along the horizontal direction.

[0049] Specifically, the fixing plate and the support rod 62 are vertically arranged to ensure balanced force when the limiting portion 64 abuts against the fixing plate.

[0050] As a convertible implementation method, it can also be, for example Figure 3 As shown, the two sets of fixing components 6 are symmetrically arranged in the vertical direction, and the clamping ends of the two sets of fixing components 6 clamp the thermocouple ceramic tube 7 in the vertical direction. This embodiment does not specifically limit the arrangement direction of the two sets of fixing components 6, and the two sets of fixing components 6 can also be arranged in the vertical direction, which can be selected according to actual conditions.

[0051] The specific working principle of the thermocouple fixing structure provided in this embodiment is as follows: when the thermocouple ceramic tube 7 needs to be fixed to the process tube 8, the support rod 62 is first pulled by an external force (which can be a manual force or the driving force of an existing linear drive device) to drive it to move away from the thermocouple ceramic tube 7, that is, the two clamping blocks 61 move away from each other, so that a space for placing the thermocouple ceramic tube 7 is formed between the two clamping blocks 61, which is convenient for installing the thermocouple ceramic tube 7. At this time, the telescopic spring 63 is in a compressed state, and when the thermocouple ceramic tube 7 is inserted into the process tube 8, After the process tube 8 is placed on the process tube 8, the force applied to the support rod 62 is released. Under the elastic force of the telescopic spring 63, the support rod 62 is driven to move towards the thermocouple ceramic tube 7, and the two clamping blocks 61 move towards each other, thereby abutting and clamping the thermocouple ceramic tube 7, so that the thermocouple ceramic tube 7 is fixed on the process tube 8 in an axial direction perpendicular to the process tube 8, and is kept in a fixed state under the elastic force of the telescopic spring 63. The thermocouple ceramic tube 7 is clamped by the symmetrically arranged fixing assembly 6, so that the force on the thermocouple ceramic tube 7 is balanced, thereby improving stability. Since the force applied by the two clamping blocks 61 is evenly distributed on both sides of the thermocouple ceramic tube 7, even if the thermocouple ceramic tube 7 expands due to heat, it will not cause deviation in the force on both sides, thus avoiding damage to the thermocouple ceramic tube 7 due to abutment with the inner wall of the mounting hole, thereby improving the service life. In addition, the thermocouple ceramic tube 7 is not easy to shift in the mounting hole, thus ensuring the verticality of the thermocouple ceramic tube 7 and the process tube 8, thereby ensuring the accuracy of temperature detection, and solving the technical problem that the existing fixed structure is prone to cause the ceramic tube on the outside of the thermocouple 4 to abut against the inner wall of the mounting hole due to lateral force, thereby affecting the service life.

[0052] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A galvanic couple fixing structure, characterized in that: include: A fixing seat (5), suitable for being fixedly arranged with an external device; Two groups of fixing components (6) are symmetrically arranged on the fixing seat (5) respectively; the two groups of fixing components (6) are movably arranged on the fixing seat (5); the clamping ends of the two groups of fixing components (6) are arranged facing each other, and have a fixed state in which they abut and clamp the thermocouple ceramic tube (7) to fix it on the process tube (8), and a separated state in which they are separated from the thermocouple ceramic tube (7).

2. The galvanic couple fixing structure according to claim 1, characterized in that: The fixing assembly (6) comprises a clamping block (61) and a telescopic driving member; the telescopic driving member is movably arranged on the fixing seat (5) and connected, and the clamping block (61) is connected to one end of the two telescopic driving members facing each other; the two clamping blocks (61) have a fixed state in which they abut against and clamp the thermocouple ceramic tube (7) under the action of the telescopic driving member, and a separated state in which they are separated from the thermocouple ceramic tube (7) under the action of the telescopic driving member.

3. The galvanic couple fixing structure according to claim 2, characterized in that: The telescopic driving member comprises a support rod (62) and a telescopic spring (63); The fixing seat (5) comprises two symmetrically arranged fixing plates, each of which is provided with a set of fixing components (6); The support rod (62) is movably inserted into the fixed plate along its axial direction; one end of the support rod (62) is connected to the clamping block (61), and the other end is connected to a limiting portion (64) for abutting the fixed plate; the telescopic spring (63) is sleeved on the support rod (62), and the two ends of the telescopic spring (63) respectively abut the clamping block (61) and the fixed plate.

4. The galvanic couple fixing structure according to claim 2, characterized in that: At least one of the clamping blocks (61) is provided with a clamping groove on an end surface facing the thermocouple ceramic tube (7), and the shape of the clamping groove is adapted to the outer circumference of the thermocouple ceramic tube (7).

5. The galvanic couple fixing structure according to claim 4, characterized in that: The clamping groove is provided on the end surfaces of the two clamping blocks (61) facing the thermocouple ceramic tube (7).

6. The galvanic couple fixing structure according to claim 2, characterized in that: The clamping block (61) is a ceramic clamping block.

7. The galvanic couple fixing structure according to any one of claims 1 to 6, characterized in that: The two groups of fixing components (6) are symmetrically arranged in the vertical direction, and the clamping ends of the two groups of fixing components (6) clamp the thermocouple ceramic tube (7) in the vertical direction.

8. The galvanic couple fixing structure according to any one of claims 1 to 6, characterized in that: The two groups of fixing components (6) are symmetrically arranged in the horizontal direction, and the clamping ends of the two groups of fixing components (6) clamp the thermocouple ceramic tube (7) in the horizontal direction.

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