Protective device for preventing thermocouple from being damaged

Abstract

Provided is a protection device for preventing a thermocouple from being damaged. An existing thermocouple protection device is complex in structure and inconvenient to replace and overhaul a thermocouple, so that the use efficiency of a boiler is affected, thermal expansion can be generated in a protection sleeve in the operation process of the boiler, and thermal expansion and cold contraction of the protection sleeve can cause damage to the thermocouple. The clamping device comprises a sleeve, a group of clamping pieces are slidably connected into the sleeve, the upper portion of the sleeve is rotatably connected with a driving disc, the group of clamping pieces are slidably connected with the driving disc, the upper portion of the sleeve is in threaded connection with a clamping nut, the clamping nut is connected with the driving disc through a spring, and the clamping nut drives the driving disc to rotate through the spring when rotating. And the driving disc drives a group of clamping pieces to clamp a thermocouple arranged in the middle of the sleeve. The thermocouple protection device is used for thermocouple protection.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of protective devices for preventing thermocouple damage. BACKGROUND

[0002] Thermocouple is the core element of boiler temperature measurement, can monitor temperature distribution in furnace in real time, provide accurate temperature data for operator. This is crucial to the operation of boiler, because it directly affects the safety and efficiency of boiler. The environment in boiler is harsh, there are high temperature, corrosive gas, high-speed erosion and abrasion of flowable powder and other adverse factors, in order to protect thermocouple from damage, protective sleeve must be used outside thermocouple, to protect thermocouple from damage, improve measurement accuracy and adapt to special environment, ensure the reliable operation and accurate measurement of thermocouple under harsh working conditions. The existing thermocouple protection device has the following problems, first, the existing thermocouple protection device structure is complex, not convenient for thermocouple replacement and maintenance, thereby affecting the efficiency of boiler, second, thermal expansion will occur in protective sleeve during boiler operation, thermal expansion and contraction of protective sleeve can cause damage to thermocouple. Third, in order to protect the good contact of protective sleeve and thermocouple, the size of protective sleeve is small, which causes poor stability of protective sleeve, and protective sleeve is easy to bend after being heated, which can easily cause damage to thermocouple. SUMMARY

[0003] The utility model aims at providing a kind of protective devices for preventing thermocouple damage, to solve the problems raised in the above background.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A kind of protective devices for preventing thermocouple damage, its composition includes sleeve, a group of clamping pieces are slidably connected inside the sleeve, the sleeve upper portion is rotatably connected with driving disc, a group of the clamping pieces are slidably connected with the driving disc, the sleeve upper portion is threadedly connected with clamping nut, the clamping nut is connected with driving disc by spring, when clamping nut rotates, driving disc is driven to rotate by spring, and driving disc drives a group of clamping pieces to clamp thermocouple installed in the middle of sleeve.

[0006] The protective devices for preventing thermocouple damage, the sleeve is hollow long barrel structure, the sleeve has a group of guide grooves inside, and one clamping piece is slidably connected in each guide groove.

[0007] The protective devices for preventing thermocouple damage, the sleeve upper portion has hollow upper seat, the upper seat is rotatably connected with driving disc inside, the driving disc end surface is uniformly distributed with a group of driving grooves, and the clamping piece pin on the upper portion of each clamping piece is slidably connected with corresponding driving groove.

[0008] The arc-shaped rod outside the driving disc passes through the side groove of the bottom of the upper seat, the clamping nut outside the upper seat is screw-connected, the arc-shaped groove outside the clamping nut clamps the arc-shaped rod, and the spring is arranged between the clamping nut and the driving disc and is sleeved outside the arc-shaped rod.

[0009] The thermocouple passes through the middle hole of the driving disc and the sealing cover, and a middle clamping piece arc is arranged in each clamping piece. Beneficial effects

[0010] 1. The utility model discloses a thermocouple protection device which comprises a driving disc, a sealing cover, a spring, a clamping nut, a clamping piece, a sleeve and a thermocouple. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a structural schematic diagram of the sleeve;

[0013] Figure 3 It is a structural schematic diagram of the clamping piece;

[0014] Figure 4 It is a structural schematic diagram of the driving disc;

[0015] Figure 5 It is a structural schematic diagram of the clamping nut;

[0016] Figure 6 It is a structural schematic diagram of the clamping nut;

[0017] In the drawing: 1, sleeve; 2, driving disc; 3, clamping piece; 4, clamping nut; 5, sealing cover; 6, spring; 7, thermocouple; 8, inner hole; 9, guide groove; 10, upper seat; 11, outer thread; 12, inner thread; 13, side groove; 14, driving groove; 15, arc-shaped rod; 16, clamping piece pin; 17, clamping piece arc; 18, arc-shaped groove. DETAILED DESCRIPTION

[0018] Please refer to Figures 1-6The utility model provides a technical scheme: including Figure 3 The sleeve 1 shown in the drawing is a long tube structure with an inner hole 8 in the middle, and a group of guide grooves 9 are arranged inside the inner hole 8; each guide groove 9 is slidably connected with one of the clamping pieces 3 shown in the drawing Figure 5 The upper part of the sleeve 1 is provided with an upper seat 10, and the upper seat 10 is a hollow disc structure; the inner part of the upper seat 10 is rotatably connected with the driving disc 2 shown in the drawing Figure 4 The driving disc 2 shown in the drawing is provided with a group of driving grooves 14 on the end face, and the number of the driving grooves 14 is consistent with that of the guide grooves 9; the upper part of each clamping piece 3 is slidably connected with the corresponding driving groove 14; when the driving disc 2 rotates, it drives the group of clamping pieces 3 to move together; the group of clamping pieces 3 slide in the corresponding guide grooves 9; since the group of driving grooves 14 are uniformly distributed on the end face of the driving disc 2, the group of clamping pieces 3 are distributed on the same circumference; when the driving disc 2 rotates, the group of clamping pieces 3 slide in the guide grooves 9; the diameter of the circle where the group of clamping pieces 3 are located becomes larger or smaller, so that the group of clamping pieces 3 can clamp the thermocouple 7 in the middle; since the thermocouple 7 is connected with the sleeve 1 through the group of clamping pieces 3, when the sleeve 1 is heated, the heat outside can be transmitted to the thermocouple 7 through the sleeve 1 and the clamping pieces 3, which ensures the consistency of the temperature outside and inside the sleeve 1 and the accuracy of the thermocouple measurement; since the thermocouple 7 is connected with the sleeve 1 through the group of clamping pieces 3, the size of the sleeve 1 can be made very large, so that the thermocouple has sufficient size to prevent the thermocouple from being damaged due to bending and deformation.

[0019] Reference Figures 2 to 6 The bottom of the cylindrical surface of the upper seat 10 is provided with a side groove 13 penetrating through the upper seat 10; the outer side of the cylindrical surface of the driving disc 2 is provided with an arc-shaped rod 15 penetrating through the side groove 13; the outer side of the upper seat 10 is provided with an external thread 11; the external thread 11 is threadedly connected with the clamping nut 4; the outer side of the clamping nut 4 is provided with an arc-shaped groove 18; the arc-shaped rod 15 is clamped in the arc-shaped groove 18; the middle part of the driving disc 2 and the clamping nut 4 is provided with a spring 6; the spring 6 is sleeved on the outer side of the arc-shaped rod 15; the two sides of the spring 6 are respectively abutted against the bottom of the arc-shaped rod 15 and the end face of the arc-shaped groove 18; when the clamping nut 4 rotates, it drives the driving disc 2 to rotate through the spring 6; since the group of clamping pieces 3 are slidably connected with the sleeve 1, the clamping nut 4 clamps the thermocouple 7 through the spring 6 and the driving disc 2; when the sleeve 1 expands or shrinks due to heating or cooling, the relative sliding between the clamping pieces 3 and the sleeve 1 and the elasticity of the spring 6 can all buffer the expansion or shrink, preventing the thermocouple from being damaged due to the expansion or shrink.

[0020] Reference Figure 2 The inner side of the upper seat 10 of the sleeve 1 is provided with an internal thread 12; the internal thread 12 is threadedly connected with the sealing cover 5; the thermocouple 7 penetrates through the sealing cover 5 and the driving disc 2; the inner side of the group of clamping pieces 3 is provided with a clamping piece arc 17 with the same diameter as the sealing cover 5; the group of clamping pieces 3 clamps the thermocouple 7; when the thermocouple 7 is installed or replaced, it only needs to rotate the clamping nut 4, which improves the installation and replacement efficiency.

[0021] When installing the thermocouple 7, rotate the clamping nut 4 so that the spring 6 is compressed, pushing the driving disc 2, which drives the set of clamping pieces 3 to loosen, and the thermocouple 7 is passed through the middle hole of the sealing cover 5 and the driving disc 2 and the set of clamping pieces 3, and then rotate the clamping nut 4 in the opposite direction, which drives the driving disc 2 to rotate through the spring 6, and the driving disc 2 drives the set of clamping pieces 3 to clamp the thermocouple 7.

Claims

1. A protective device for preventing damage to a thermocouple, characterised in that The composition comprises a sleeve, a set of clamping pieces slidingly connected inside the sleeve, a driving disc rotationally connected to the upper part of the sleeve, a set of the clamping pieces slidingly connected to the driving disc, a clamping nut threadedly connected to the upper part of the sleeve, the clamping nut being connected to the driving disc through a spring, the clamping nut being rotated to drive the driving disc to rotate through the spring, and the driving disc driving a set of clamping pieces to clamp a thermocouple installed in the middle of the sleeve.

2. A protective device for preventing damage to a thermocouple as claimed in claim 1, wherein The sleeve is a hollow long cylindrical structure, the sleeve has a set of guide grooves inside, and each of the guide grooves slidingly connects a clamping piece.

3. A protective device for preventing damage to a thermocouple as claimed in claim 2, wherein The upper part of the sleeve has a hollow upper seat, the driving disc is rotationally connected inside the upper seat, the end surface of the driving disc uniformly distributes a set of driving grooves, and the upper part of each clamping piece is slidingly connected to the corresponding driving groove through a clamping pin.

4. The protective device for preventing damage to a thermocouple as defined in claim 3, wherein The arc-shaped rod outside the driving disc passes through the side groove at the bottom of the upper seat, the clamping nut is threadedly connected to the outside of the upper seat, the arc-shaped groove outside the clamping nut clamps the arc-shaped rod, a spring is arranged between the clamping nut and the driving disc, and the spring is sleeved outside the arc-shaped rod.

5. A protective device for preventing damage to a thermocouple as claimed in claim 4, wherein The thermocouple passes through the hole between the driving disc and the sealing cover, and each of the clamping pieces is provided with a clamping arc in the middle, and the thermocouple is clamped in the middle of a set of clamping arcs.

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