CN218723120U

CN218723120U - Verification furnace positioner

Info

Publication number: CN218723120U
Application number: CN202223035592.XU
Authority: CN
Inventors: 徐震震; 裴志强; 张开兴
Original assignee: Shandong Pan Ran Instrument Group Co ltd
Current assignee: Shandong Pan Ran Instrument Group Co ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-03-24
Anticipated expiration: 2032-11-15

Abstract

The utility model relates to the technical field of thermocouple verification auxiliary equipment, in particular to a verification furnace positioner which is arranged inside a furnace tube; the positioner comprises a positioning block, the positioning block is in a columnar structure matched with the inner wall of the furnace tube in shape, and an accommodating cavity is arranged in the positioning block; one end of the accommodating cavity is provided with an opening for accommodating a thermocouple to perform positioning installation; the fixed rod is arranged at one end of the furnace tube through the packaging assembly, and one end of the fixed rod penetrates through the packaging assembly and extends to the outside of the furnace tube to be grounded, so that electric leakage interference caused during thermocouple verification is prevented; in the utility model, the positioner can be fixedly installed without additionally arranging a fixing and locking device through the mutual matching between the packaging assembly and the thermocouple, and the positioner has simple structure and convenient installation and disassembly; meanwhile, the fixed rod is grounded through the power line, so that electric leakage interference can be prevented.

Description

Verification furnace positioner

Technical Field

The utility model relates to a thermocouple examination auxiliary assembly technical field, in particular to examine and determine stove locator.

Background

The calibration standard and the calibration standard of the related countries have certain requirements on the depth of the thermocouple inserted into the constant temperature source, but at present, the size of the thermocouple is mostly measured manually, and then the thermocouple is installed in the furnace tube of the calibration furnace according to the measured size, so that the operation is more complicated, and the thermocouple is inconvenient to position and install.

Based on the defects, the publication number "CN209541949U" in the prior art discloses a coaxial temperature equalizing block of a tubular thermocouple verification furnace, which comprises a metal cylinder, a first blind hole for positioning and installing a standard thermocouple and a second blind hole for positioning and installing a self-contained thermocouple, wherein the insertion depth of the thermocouple can be limited, and the positioning and the installation are convenient.

However, in the process of using the verification furnace, when the temperature rises to a certain temperature, the material performance of the thermocouple changes to a certain extent, for example, the insulation performance of the thermocouple insulation material and the thermal insulation material is reduced, and the insulation performance of the insulation resistance is obviously reduced along with the temperature rise, so that the power supply of the verification furnace leaks onto the thermocouple through the heating material, the thermal insulation material, the thermocouple protection tube and the insulation material to cause leakage interference, and the verification work of the thermocouple is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a examine and determine stove locator has mainly solved the technical problem who proposes among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme:

a calibrating furnace positioner is arranged in a furnace tube;

the positioner comprises a positioning block, the positioning block is in a columnar structure matched with the inner wall of the furnace tube in shape, and an accommodating cavity is arranged in the positioning block;

one end of the accommodating cavity is provided with an opening for accommodating a thermocouple to perform positioning installation;

a connecting rod and a fixed rod are sequentially arranged on one side of the positioning block, which is far away from the opening, and the connecting rod and the fixed rod are coaxially arranged with the positioning block;

the dead lever passes through the encapsulation subassembly and installs the one end at the boiler tube, the one end of dead lever runs through the encapsulation subassembly extends to the outside of boiler tube, just dead lever ground connection sets up for cause electric leakage interference when preventing the thermocouple examination.

Preferably, the packaging assembly comprises a plug, and the plug is arranged at one end of the furnace tube through a plug end cover;

the plug is of a cylindrical structure, a guide column is arranged on the inner wall of the plug along the direction of the central axis, and one end of the guide column penetrates through and extends to the outer side of the plug end cover;

one end of the guide post is provided with a mounting hole along the direction of the central axis, and the mounting hole sequentially penetrates through the guide post and the plug and is used for installing the fixing rod to guide and install the positioner.

Preferably, a limiting block is arranged between the connecting rod and the fixing rod, and one end of the limiting block abuts against the end face of the plug and is used for achieving unilateral limiting of the positioner.

Preferably, one end of the fixing rod penetrates through and extends to the outside of the mounting hole, and the fixing rod is connected with a ground contact of a control circuit board arranged in the furnace body through a power line;

the furnace body is set as a metal furnace and is electrically connected with the grounding contact of the control circuit board, and the furnace body is arranged on the ground and used for preventing electric leakage interference during thermocouple verification.

Preferably, the other end of the accommodating cavity is uniformly provided with a plurality of groups of vent holes for reducing the influence on the original temperature field in the furnace tube.

Preferably, the fixing rod is of a conical structure, and the diameter of one side, close to the limiting block, of the fixing rod is larger than that of one side, far away from the limiting block, of the fixing rod.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the utility model, the positioner can be fixedly installed without additionally arranging a fixing and locking device through the mutual matching between the packaging assembly and the thermocouple, and the positioner has simple structure and convenient installation and disassembly; meanwhile, the fixed rod is grounded through the power line, so that electric leakage interference can be prevented.

2. The utility model discloses in, evenly seted up the multiunit air vent through the one side that holds the chamber, can reduce the influence that causes the inside former temperature field of boiler tube, guarantee the homogeneity in temperature field.

3. In the utility model, the dead lever is set to be a conical structure, so that the abrasion loss of the dead lever and the mounting hole in the assembling process can be reduced, and the coaxiality of the positioner in the furnace tube can be ensured; meanwhile, in order to improve the installation reliability between the fixing rod and the installation hole, the installation hole is set to be in a conical structure matched with the fixing rod, the contact area of the fixing rod and the installation hole is increased, and the axial stress of the fixing rod is guaranteed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of the positioner of the present invention;

fig. 2 is a cross-sectional view of the thermocouple calibration furnace of the present invention in a working state;

in the figure: the furnace tube fixing device comprises a positioner 1, a positioning block 11, an accommodating cavity 111, a vent hole 112, a connecting rod 12, a limiting block 13, a fixing rod 14, a furnace tube 2, a furnace tube end cover 3, a packaging assembly 4, a plug 41, a guide column 42, an installation hole 421, a plug end cover 43, a furnace body 5, a power line 6, a thermocouple 7, a control circuit board 8 and a grounding contact 81.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

As shown in fig. 1-2, the utility model provides a verification stove locator, this locator 1 is installed inside boiler tube 2, and boiler tube 2 sets up in furnace body 5 simultaneously, and 3 fixed mounting in the relative both sides of furnace body 5 are passed through at boiler tube end cover in boiler tube 2's both ends, and boiler tube 2's one end is passed through encapsulation subassembly 4 and is carried out spacing installation to locator 1, and the other end is used for inserting thermocouple 7 to fix a position the installation to thermocouple 7 through locator 1.

The positioner 1 comprises a positioning block 11, the positioning block 11 is in a columnar structure matched with the inner wall of the furnace tube 2, and an accommodating cavity 111 is arranged in the positioning block 11; one end of the accommodating cavity 111 is provided with an opening for installing a thermocouple 7 (including a standard thermocouple and a self-contained thermocouple); a plurality of groups of vent holes 112 are uniformly formed in the other end of the accommodating cavity 111, so that the uniformity of the temperature field in the furnace tube 2 is ensured; a connecting rod 12, a limiting block 13 and a fixing rod 14 are sequentially welded on one side, far away from the opening, of the positioning block 11, and the connecting rod 12 and the fixing rod 14 are coaxially arranged with the positioning block 11; one end of the fixing rod 14 penetrates through the package assembly 4 and extends to the outside of the furnace tube 2, and the fixing rod 14 is grounded and used for preventing leakage interference caused during verification of the thermocouple 7.

In the embodiment, in order to avoid that the insulation performance of the thermocouple 7 insulation material and the heat insulation material is reduced after the temperature in the furnace body 5 rises to a certain temperature in the use process of the verification furnace, the insulativity of the insulation resistance is obviously reduced along with the temperature rise, so that the power supply of the verification furnace leaks onto the thermocouple through the heating material, the heat insulation material, the thermocouple 7 protection tube and the insulation material to cause leakage interference; therefore, the fixing rod 14 is electrically connected with the grounding contact 81 of the control circuit board 8 arranged in the furnace body 5 through the power cord 6, then the furnace body 5 is electrically connected with the grounding contact 81 of the control circuit board 8, and the metal furnace body 5 with conductive performance is directly and fixedly arranged on the ground without laying an insulating gasket at the bottom of the furnace body 5, so that the grounding arrangement of the fixing rod 14 can be realized, and the defect of electric leakage interference of the thermocouple 7 in the verification process can be overcome; meanwhile, the wiring paths of the power lines 6 may be arranged according to actual requirements (only for more clearly showing the connection relationship of the power lines 6 in fig. 2).

In the embodiment, in order to solve the problem of serious heat loss at the furnace mouth in the process of detecting the thermocouple 7, the fixed rod 14 is fixedly installed at one end of the furnace tube 2 through the packaging assembly 4; the packaging assembly 4 comprises a plug 41, the plug 41 is inserted into one end of the furnace tube 2, a plug end cover 43 is mounted at the end of the plug 41, and the plug end cover 43 is fixedly mounted on the outer end face of the furnace tube end cover 3 through fasteners such as bolts and the like and used for limiting and mounting the plug 41.

The plug 41 is of a cylindrical structure, the inner wall of the plug 41 is fixedly connected with a guide column 42 along the central axis direction, and one end of the guide column 42 penetrates through and extends to the outer side of a plug end cover 43; one end of the guide post 42 is provided with a mounting hole 421 along the central axis, and the mounting hole 421 sequentially penetrates through the guide post 42 and the plug 41 and is used for installing the positioner 1 to position and install the thermocouple 7; in the installation process, firstly, the positioner 1 is installed in the furnace tube 2, and the fixing rod 14 is inserted into the installation hole 421 from one side of the plug 41, so that the limiting block 13 abuts against the plug 41, and the unilateral limiting of the positioner 1 is realized; then insert thermocouple 7 from the other end of boiler tube 2, when the degree of depth that thermocouple 7 inserted reached in holding the chamber 111, can be supported by locating piece 11 to obtain the position that needs the detection, realize the dual spacing and the location of locator 1 and thermocouple 7, need not establish fixed locking device in addition, alright in order to realize the fixed mounting to locator 1, simple structure, be convenient for installation and dismantlement.

In this embodiment, in order to facilitate the detachment and replacement of the connecting rod 12 and the fixing rod 14, the connecting rod 12 and the fixing rod 14 may be fastened to the positioning block 11 by a snap.

As a preferred embodiment of the present embodiment, in order to reduce the wear amount of the fixing rod 14 and the mounting hole 421 during the assembling process, and to ensure the coaxiality of the positioner 1 mounted in the furnace tube 2, the fixing rod 14 is set to be a tapered structure, and the diameter of the fixing rod 14 on the side close to the stopper 13 is larger than the diameter of the fixing rod on the side far from the stopper 13; meanwhile, in order to improve the installation reliability between the fixing rod 14 and the installation hole 421, the installation hole 421 is set to be a tapered structure matched with the fixing rod 14, and the contact area between the fixing rod 14 and the installation hole 421 is increased.

In the utility model, the locator 1 can be fixedly installed through the mutual matching between the limiting block 13 and the plug 41 and the mutual matching between the positioning block 11 and each thermocouple 7 without additionally arranging a fixing and locking device, and the locator 1 has simple structure and convenient installation and disassembly; meanwhile, a plurality of groups of vent holes 112 are uniformly formed in one side of the accommodating cavity 111, so that the influence on the original temperature field in the furnace tube 2 can be reduced, and the uniformity of the temperature field is ensured.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a verification stove locator which characterized in that: the positioner (1) is arranged inside the furnace tube (2);

the positioner (1) comprises a positioning block (11), the positioning block (11) is in a columnar structure matched with the inner wall of the furnace tube (2), and an accommodating cavity (111) is arranged in the positioning block (11);

one end of the accommodating cavity (111) is provided with an opening for accommodating a thermocouple (7) to perform positioning installation;

a connecting rod (12) and a fixing rod (14) are sequentially arranged on one side, away from the opening, of the positioning block (11), and the connecting rod (12) and the fixing rod (14) are coaxially arranged with the positioning block (11);

dead lever (14) are installed in the one end of boiler tube (2) through encapsulation subassembly (4), the one end of dead lever (14) is run through encapsulation subassembly (4) and extend to the outside of boiler tube (2), just dead lever (14) ground connection sets up for cause electric leakage interference when preventing thermocouple (7) examination.

2. The certification furnace positioner of claim 1, wherein: the packaging assembly (4) comprises a plug (41), and the plug (41) is arranged at one end of the furnace tube (2) through a plug end cover (43);

the plug (41) is of a cylindrical structure, a guide column (42) is arranged on the inner wall of the plug (41) along the direction of the central axis, and one end of the guide column (42) penetrates through and extends to the outer side of the plug end cover (43);

one end of the guide column (42) is provided with a mounting hole (421) along the direction of the central axis, and the mounting hole (421) sequentially penetrates through the guide column (42) and the plug (41) and is used for installing the fixing rod (14) to guide and install the positioner (1).

3. The certification furnace positioner of claim 2, wherein: a limiting block (13) is arranged between the connecting rod (12) and the fixing rod (14), and one end of the limiting block (13) abuts against the end face of the plug (41) and is used for achieving one-side limiting of the positioner (1).

4. The certification furnace positioner of claim 3, wherein: one end of the fixed rod (14) penetrates through and extends to the outside of the mounting hole (421), and the fixed rod (14) is connected with a grounding contact (81) of a control circuit board (8) arranged inside the furnace body (5) through a power line (6);

the furnace body (5) is set as a metal furnace, the furnace body (5) is electrically connected with the grounding contact (81) of the control circuit board (8), and the furnace body (5) is installed on the ground and used for preventing electric leakage interference caused during verification of the thermocouple (7).

5. The certification furnace positioner of claim 1, wherein: the other end of the accommodating cavity (111) is uniformly provided with a plurality of groups of vent holes (112) for reducing the influence on the original temperature field in the furnace tube (2).

6. The certification furnace positioner of claim 4, wherein: the fixing rod (14) is of a conical structure, and the diameter of one side, close to the limiting block (13), of the fixing rod (14) is larger than that of one side, far away from the limiting block (13).