Multifunctional protective sleeve for thermocouple

Abstract

The utility model discloses a multifunctional protective sleeve for a thermocouple, which relates to the field of protective sleeves and comprises an inner protective sleeve at the outer end of a temperature sensing element, an air inlet pipe is fixedly arranged at the outer end of the inner protective sleeve, a detachable sealing plug is arranged at the opening end of the air inlet pipe, and an upper limiting ring and a lower limiting ring are arranged at the outer end of the inner protective sleeve. An outer sheath arranged at the outer end of the inner sheath in a sleeving mode is arranged between the upper limiting ring and the lower limiting ring, two outer ventilation grooves are formed in the outer end of the outer sheath, and two inner ventilation grooves are formed in the outer end of the inner sheath. According to the utility model, the outer end of the inner sheath is sleeved with the outer sheath, the outer ventilation slots can be driven to rotate by rotating the outer sheath, the outer ventilation slots and the inner ventilation slots are controlled to be overlapped or staggered, and further whether the inner sheath is communicated with the outside is controlled, so that the outer sheath does not need to be frequently dismounted and mounted in a manner of closing the inner ventilation slots, and the operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the field of protective sleeves, in particular to a multifunctional protective sleeve for thermocouples. Background Art

[0002] Thermocouple is a common temperature measuring element, often used in temperature measuring instruments. It can convert temperature signals into thermoelectric potential signals. Thermocouples can be used to measure temperature in industrial production processes in the fields of steel, petroleum, etc., as well as in various chemical and physical experiments in laboratories.

[0003] Different types of thermocouples may differ in appearance, but their structures are basically similar, and are all composed of a thermoelectrode, an insulating sleeve protection tube, a junction box, etc., such as a thermocouple protective sleeve with a publication number of CN220206871U in the prior art.

[0004] In the prior art, an outer sheath for protecting the cleaning hole is arranged outside the thermocouple protective sheath. The cleaning hole is closed at ordinary times to prevent dust from entering. When cleaning, the outer sheath is removed for cleaning. This structure requires frequent disassembly and installation of the outer sheath, which is too troublesome to use. Summary of the invention

[0005] In view of the shortcomings of the prior art, the utility model provides a multifunctional protective cover for a thermocouple, which controls whether the inner cover is connected to the outside by controlling whether the outer ventilation grooves overlap or staggered with the inner ventilation grooves. This method of closing the inner ventilation grooves does not require frequent disassembly and installation of the outer cover, and is more convenient to operate, which can effectively solve the problems in the background technology.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: a multifunctional thermocouple protective sleeve, which is used to protect the thermocouple, the lower half of the thermocouple is a temperature sensing element, the outer end of the temperature sensing element is covered with an inner sleeve, the outer end of the inner sleeve is fixed with an air intake pipe, and the open end of the air intake pipe is provided with a detachable sealing plug;

[0007] An upper limit ring and a lower limit ring are provided at the outer end of the inner sheath, an outer sheath is provided between the upper limit ring and the lower limit ring and is sleeved on the outer end of the inner sheath, two outer ventilation grooves are provided at the outer end of the outer sheath, and two inner ventilation grooves are provided at the outer end of the inner sheath. When the outer ventilation grooves are rotated to overlap with the inner ventilation grooves, the outer sheath can be opened and the air can be discharged.

[0008] Furthermore, the upper limit ring is fixedly arranged at the outer end of the inner sleeve, the outer end of the inner sleeve is provided with a threaded sleeve through a threaded sleeve, and the lower limit ring is fixedly arranged at the top end of the inner sleeve.

[0009] Furthermore, a fixing assembly for fixing the position of the outer sheath is provided at the outer end of the outer sheath, and the fixing assembly comprises an external tube fixedly provided at the outer end of the outer sheath, and a positioning rod is provided inside the external tube.

[0010] Furthermore, one end of the positioning rod extends to the outside of the external tube and is fixedly provided with a handle, and a second spring is provided between the handle and the external tube, and the elastic force of the second spring is used to drive the positioning rod;

[0011] A positioning groove is provided at the outer end of the inner sheath, and the other end of the positioning rod extends into the inner part of the outer sheath and is embedded in the positioning groove, thereby fixing the outer sheath to the outer end of the inner sheath.

[0012] Furthermore, a weight block is provided inside the inner sheath, and the weight block is sleeved on the outer end of the temperature sensing element. Metal bristles are fixed on the outer end and inner wall of the weight block. The two metal bristles are respectively in contact with the outer end of the temperature sensing element and the inner wall of the inner sheath. The metal bristles are made of metal wire, have toughness and are resistant to high temperatures, and the metal bristles will not block the airflow, and the airflow can pass through the gaps between the metal bristles.

[0013] Furthermore, a first spring is fixedly provided on the top of the weight block, and a fixing ring located on the inner wall of the inner sheath is fixedly provided on the top of the first spring.

[0014] Compared with the prior art, the utility model provides a thermocouple multifunctional protective cover, which has the following beneficial effects:

[0015] By putting an outer sheath on the outer end of the inner sheath, rotating the outer sheath can drive the outer ventilation groove to rotate, control the overlap or stagger of the outer ventilation groove and the inner ventilation groove, and then control whether the inner sheath is connected to the outside world. This method of closing the inner ventilation groove does not require frequent disassembly and installation of the outer sheath, and is more convenient to operate.

[0016] By swinging, the weight block moves back and forth up and down inside the inner sheath. During the movement, the metal bristles rub against the outer end of the temperature sensing element and the inner wall of the inner sheath. The friction can remove dust attached to the outer end of the temperature sensing element and the inner wall of the inner sheath, so that the dust can fall off and be discharged with the airflow during the subsequent cleaning process. This method improves the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall structure diagram of the utility model;

[0018] Figure 2 For the utility model Figure 1 Enlarged view of part A in the middle;

[0019] Figure 3 This is the internal structure diagram of the inner sheath of the utility model;

[0020] Figure 4 It is a cross-sectional view of the fixing assembly of the utility model;

[0021] Figure 5 It is a top sectional view of the inner and outer sheaths of the utility model.

[0022] In the figure: 1. thermocouple; 2. upper limit ring; 3. outer sheath; 4. outer ventilation groove; 5. threaded sleeve; 6. lower limit ring; 7. inner sheath; 8. temperature sensing element; 9. fixing ring; 10. first spring; 11. weight block; 12. metal bristles; 13. air inlet pipe; 14. sealing plug; 15. fixing assembly; 1501. external tube; 1502. positioning rod; 1503. handle; 1504. second spring; 16. positioning groove; 17. inner ventilation groove. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1-5 As shown, the utility model provides a thermocouple multifunctional protective sleeve for protecting a thermocouple 1, wherein the lower half of the thermocouple 1 is a temperature sensing element 8, an inner sleeve 7 is sleeved on the outer end of the temperature sensing element 8, an air inlet pipe 13 is fixedly disposed on the outer end of the inner sleeve 7, and a detachable sealing plug 14 is disposed at the open end of the air inlet pipe 13;

[0025] An upper limit ring 2 and a lower limit ring 6 are provided at the outer end of the inner sheath 7, an outer sheath 3 is provided between the upper limit ring 2 and the lower limit ring 6 and is sleeved on the outer end of the inner sheath 7, two outer ventilation grooves 4 are provided at the outer end of the outer sheath 3, and two inner ventilation grooves 17 are provided at the outer end of the inner sheath 7. When the outer ventilation grooves 4 are rotated to overlap with the inner ventilation grooves 17, the outer sheath 3 can be opened and the air can be discharged.

[0026] The upper limit ring 2 is fixedly arranged at the outer end of the inner sleeve 7 , the outer end of the inner sleeve 7 is provided with a threaded sleeve 5 through a threaded sleeve, and the lower limit ring 6 is fixedly arranged at the top end of the inner sleeve 7 .

[0027] Before cleaning the dust, first rotate the outer sleeve 3 to drive the outer ventilation slots 4 at the outer end of the outer sleeve 3 to rotate, so that the positions of the two outer ventilation slots 4 coincide with the positions of the two inner ventilation slots 17 respectively. At this time, the interior of the outer sleeve 3 can be connected with the outside through the inner ventilation slots 17 and the outer ventilation slots 4. Subsequently, during the cleaning process, open the sealing plug 14 at the open end of the air inlet pipe 13, and air can be blown into the interior of the inner sleeve 7 through the air inlet pipe 13. The flowing air drives the dust on the inner wall of the inner sleeve 7 and the outer end of the temperature sensing element 8, so that the dust is discharged outward through the inner ventilation slots 17 and the outer ventilation slots 4 along with the flowing air, thereby achieving the purpose of cleaning. When the cleaning is completed, rotate the outer sleeve 3 so that the outer ventilation slots 4 rotate and are staggered with the inner ventilation slots 17, and the inner ventilation slots 17 can be closed by the outer sleeve 3. In this way, it is possible to prevent external dust from entering the interior of the outer sleeve 3 through the inner ventilation slots 17, and this method of closing the inner ventilation slots 17 does not require frequent disassembly and installation of the outer sleeve 3, and the operation is more convenient.

[0028] After the outer sheath 3 is rotated and the inner ventilation slot 17 is closed, the position of the outer sheath 3 needs to be fixed, such as Figure 1 , 2 As shown in FIG. 4 , the outer end of the outer sheath 3 is provided with a fixing assembly 15 for fixing the position of the outer sheath 3 . The fixing assembly 15 includes an external tube 1501 fixedly arranged at the outer end of the outer sheath 3 . A positioning rod 1502 is arranged inside the external tube 1501 .

[0029] One end of the positioning rod 1502 extends to the outside of the external tube 1501 and is fixed with a handle 1503. A second spring 1504 is provided between the handle 1503 and the external tube 1501. The elastic force of the second spring 1504 drives the positioning rod 1502.

[0030] A positioning groove 16 is formed at the outer end of the inner sheath 7 , and the other end of the positioning rod 1502 extends into the inner part of the outer sheath 3 and is embedded in the positioning groove 16 , thereby fixing the outer sheath 3 to the outer end of the inner sheath 7 .

[0031] During the rotation of the outer sheath 3, the fixing assembly 15 fixed at the outer end of the outer sheath 3 will rotate synchronously with the outer sheath 3. When the outer ventilation groove 4 on the outer sheath 3 is staggered with the inner ventilation groove 17 and drives the fixing assembly 15 to rotate to the positioning groove 16, the positioning rod 1502 will be inserted into the positioning groove 16 under the elastic force of the second spring 1504, so as to fix the outer sheath 3 to the outer end of the inner sheath 7. When the outer sheath 3 needs to be rotated before cleaning, the positioning rod 1502 is pulled outward by the handle 1503 to be pulled out of the positioning groove 16, thereby releasing the connection between the outer sheath 3 and the inner sheath 7.

[0032] Before cleaning, it is also necessary to remove more stubborn dust on the outer end of the temperature sensing element 8 and the inner wall of the inner sheath 7, such as Figure 3 As shown, a weight block 11 is provided inside the inner sheath 7, and the weight block 11 is sleeved on the outer end of the temperature sensing element 8. Metal bristles 12 are fixed on the outer end and inner wall of the weight block 11. The two metal bristles 12 are respectively in contact with the outer end of the temperature sensing element 8 and the inner wall of the inner sheath 7. The metal bristles 12 are made of metal wire, have toughness and are resistant to high temperatures, and the metal bristles 12 will not block the airflow, and the airflow can pass through the gaps between the metal bristles 12.

[0033] A first spring 10 is fixedly disposed on the top of the weight block 11 , and a fixing ring 9 located on the inner wall of the inner sheath 7 is fixedly disposed on the top of the first spring 10 .

[0034] Before the cleaning officially begins, the upper part of the thermocouple 1 can be fixed and the lower part including the inner sheath 7 and the temperature sensing element 8 can be swung. During the swinging process, the heavier weight 11 will move downward along the temperature sensing element 8 under the action of inertia during the swinging, and the first spring 10 will also be stretched by the weight 11. After the swinging stops, the first spring 10 pulls the weight 11 back to its original position, and reciprocates in this way. During the movement, the metal bristles 12 on the outer end and inner wall of the weight 11 will respectively rub against the inner wall of the inner sheath 7 and the outer end of the temperature sensing element 8. The dust attached to the outer end of the temperature sensing element 8 and the inner wall of the inner sheath 7 can be removed by friction, so that the dust can fall off and be discharged with the airflow during the subsequent cleaning process. This method improves the cleaning effect.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A multifunctional thermocouple protective sleeve, used for protecting a thermocouple (1), wherein the lower half of the thermocouple (1) is a temperature sensing element (8), and an inner sleeve (7) is provided on the outer end of the temperature sensing element (8), characterized in that: An air inlet pipe (13) is fixedly provided at the outer end of the inner sheath (7), and a detachable sealing plug (14) is provided at the open end of the air inlet pipe (13); An upper limit ring (2) and a lower limit ring (6) are provided at the outer end of the inner sleeve (7); an outer sleeve (3) sleeved on the outer end of the inner sleeve (7) is provided between the upper limit ring (2) and the lower limit ring (6); two outer ventilation grooves (4) are provided at the outer end of the outer sleeve (3); and two inner ventilation grooves (17) are provided at the outer end of the inner sleeve (7).

2. A thermocouple multifunctional protective cover according to claim 1, characterized in that: The upper limit ring (2) is fixedly arranged at the outer end of the inner sleeve (7), the outer end of the inner sleeve (7) is provided with a threaded sleeve (5) via a threaded sleeve, and the lower limit ring (6) is fixedly arranged at the top end of the inner sleeve (7).

3. The multifunctional protective cover for thermocouple according to claim 1, characterized in that: The outer end of the outer sheath (3) is provided with a fixing assembly (15) for fixing the position of the outer sheath (3), the fixing assembly (15) comprising an external tube (1501) fixedly arranged on the outer end of the outer sheath (3), a positioning rod (1502) being provided inside the external tube (1501).

4. A thermocouple multifunctional protective cover according to claim 3, characterized in that: One end of the positioning rod (1502) extends to the outside of the external tube (1501) and is fixedly provided with a handle (1503); a second spring (1504) is provided between the handle (1503) and the external tube (1501); A positioning groove (16) is provided at the outer end of the inner sheath (7), and the other end of the positioning rod (1502) extends into the interior of the outer sheath (3) and is embedded in the positioning groove (16).

5. The multifunctional thermocouple protective cover according to claim 1, characterized in that: A weight block (11) is provided inside the inner sheath (7), and the weight block (11) is sleeved on the outer end of the temperature sensing element (8). Metal bristles (12) are fixedly provided on the outer end and inner wall of the weight block (11), and the two metal bristles (12) are in contact with the outer end of the temperature sensing element (8) and the inner wall of the inner sheath (7), respectively.

6. A thermocouple multifunctional protective cover according to claim 5, characterized in that: A first spring (10) is fixedly provided at the top end of the weight block (11), and a fixing ring (9) located on the inner wall of the inner sleeve (7) is fixedly provided at the top end of the first spring (10).

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