Overload-resistant thermocouple temperature sensor

Abstract

The utility model provides an anti-overload thermocouple temperature sensor, which comprises a sensor body, a switching bridge plate and a combined screw sleeve, a protective sleeve is arranged outside the sensor body, one side of the switching bridge plate is provided with a waist-shaped slideway, the bottom in the waist-shaped slideway is provided with connecting holes at two ends, and the connecting holes are connected with the combined screw sleeve. The switching bridge plate is fixedly arranged outside the protective sleeve in a sleeving mode through one connecting hole, the inner hole diameter of the combined threaded sleeve is the same as the outer diameter of the protective sleeve, the combined threaded sleeve is formed by two independent semicircular threaded sleeves in a butt joint mode, and the peripheral wall of each semicircular threaded sleeve is fixedly connected with a check block close to one end. According to the utility model, through the arrangement of the combined screw sleeve which can be split into the two semicircular screw sleeves, threads do not need to be processed outside the protective sleeve, and the protective sleeve can be conveniently connected with an external positioning plate through a thread structure by combining the combined screw sleeve and the protective sleeve, so that the processing difficulty of the protective sleeve is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature sensors, in particular to an overload-resistant thermocouple temperature sensor. Background Art

[0002] At present, it is common to place dynamic temperature sensors at the engine inlet to measure the total temperature parameters of the flow field. In order to capture the temperature transient process at the engine inlet, the sensor is required to have a small time constant (usually less than 30ms) while ensuring measurement accuracy. The two thermocouple wire materials of traditional thermocouple temperature sensors are often connected by spot welding or bead welding. In order to obtain fast response characteristics, the thermocouple wire is made very thin, resulting in poor structural strength. In actual use, it is impacted by the high-speed airflow in the air inlet, and the thermocouple wire often breaks, resulting in data loss, which seriously affects the accuracy of the test flight results.

[0003] The invention patent with publication number CN109540318B proposes a high-response overload-resistant thermocouple temperature sensor, comprising: a protective sleeve, an insulating tip, a five-layer membrane structure, a constantan thermocouple layer compensation wire and a copper thermocouple layer compensation wire; the five-layer membrane structure is composed of a first insulating layer, a constantan thermocouple layer, a second insulating layer, a copper thermocouple layer, and a third insulating layer in sequence; the rear end thereof is provided with compensation wire pads of constantan and copper thermocouple layers, respectively, and two extremely thin thermocouple layers form thermocouple contacts through grinding motion to ensure the high dynamic response characteristics of the sensor; the five-layer membrane structure is pressed and fixed between the two halves of the insulating tip, and the insulating tip is inserted into the protective sleeve to form a small inertia temperature sensor; the temperature sensor of the present invention using a new packaging process has fast dynamic response characteristics and high structural strength.

[0004] However, the above-mentioned prior art still has the following deficiencies when used: 1. The protective cover is made of stainless steel, and the threaded part thereon is usually made in one piece. However, due to the high hardness and brittleness of stainless steel threads, there is a defect that the thread processing is difficult, and after long-term use, there is great resistance to disassembly, which makes it inconvenient to replace the temperature sensor; 2. The method of processing threads on the outer wall of the protective cover has the defect of large installation limitations. For example, when the installation position is narrow, the protective cover with external threads is directly inserted into the connecting hole on the connecting plate, and then connected with a nut. Since the protective cover has a certain length, there is a defect that the docking operation is inconvenient.

[0005] To this end, the utility model provides an overload-resistant thermocouple temperature sensor. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an overload-resistant thermocouple temperature sensor to solve the problems raised in the above-mentioned background technology. The utility model has the advantages of being simpler to manufacture and having a protective cover connected to the outside world through threads, and being more convenient to replace the connection method, and is suitable for installation in small spaces.

[0007] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: an overload-resistant thermocouple temperature sensor, comprising a sensor body, a protective cover is arranged on the outside of the sensor body, and also comprising a switching bridge plate and a combined wire sleeve, a waist-shaped slide is provided on one side of the switching bridge plate, and connecting holes are provided at both ends at the bottom of the waist-shaped slide, and the switching bridge plate is fixedly sleeved on the outside of the protective cover through one of the connecting holes, the inner aperture of the combined wire sleeve is the same as the outer diameter of the protective cover, and the combined wire sleeve is formed by connecting two independent semicircular wire sleeves, and the outer peripheral wall of the semicircular wire sleeve is fixedly connected with a stopper close to one end, and the inner peripheral wall of the waist-shaped slide is provided with a waist-shaped limiting groove used in conjunction with the stopper.

[0008] Furthermore, both ends of the block extend to a position close to the end face of the semicircular thread sleeve splicing, and a limit pile is set on the back of the switching bridge plate. The limit pile is located on the center line of the waist-shaped slide and close to the connecting hole. The limit pile and the switching bridge plate are slidably matched and used in conjunction with one end of the block.

[0009] Furthermore, a guide hole having the same outer diameter as the limit pile is formed through the back side of the switching bridge plate.

[0010] Furthermore, the joint surfaces on the semicircular silk sleeve are respectively provided with plug-in grooves and plug-in columns, and the two combined silk sleeves form a complete combined silk sleeve through the plug-in cooperation of the plug-in grooves and the plug-in columns.

[0011] Furthermore, the thickness of the stopper is equal to the height of the waist-shaped limiting groove.

[0012] Furthermore, the arc parts at both ends of the waist-shaped slideway are coaxial with the connecting hole.

[0013] Furthermore, a layer of protective rubber pad is bonded to the inner peripheral wall of the semicircular wire sleeve.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model provides a combined thread sleeve that can be split into two semicircular thread sleeves. There is no need to process threads on the outside of the protective sleeve. By combining the combined thread sleeve and the protective sleeve, the protective sleeve can be conveniently connected to the external positioning plate through the thread structure, which greatly reduces the difficulty of processing the protective sleeve.

[0016] 2. The utility model has the advantage that since the combined thread sleeve is composed of two semicircular thread sleeves, the resistance formed when the combined thread sleeve is disassembled after being connected to the external nut for a long time is small, and it is more convenient to disassemble the nut and replace the temperature sensor.

[0017] 3. The utility model provides a switching bridge plate fixedly connected to the protective cover, and then provides a waist-shaped slideway and a waist-shaped limiting groove in the waist-shaped slideway on the switching bridge plate. Finally, a stopper is provided on the outer peripheral wall of the semicircular wire sleeve, so that the combined wire sleeve can continue to be connected to the external positioning plate after being separated from the protective cover. This arrangement greatly reduces the difficulty of the temperature sensor and installation, and is suitable for installation in a smaller space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an overload-resistant thermocouple temperature sensor of the utility model;

[0019] Figure 2 for Figure 1 The structural diagram at the bottom;

[0020] Figure 3 This is a schematic diagram of an anti-overload thermocouple temperature sensor of the utility model, in which a combined wire sleeve is placed outside the protective sleeve;

[0021] Figure 4 The utility model is a schematic diagram of a semicircular wire sleeve of an overload-resistant thermocouple temperature sensor.

[0022] In the figure: 1. sensor body; 2. protective cover; 3. switching bridge plate; 31. guide hole; 4. combined wire sleeve; 41. semicircular wire sleeve; 411. protective rubber pad; 412. plug-in slot; 413. plug-in column; 5. waist-shaped slideway; 51. waist-shaped limit groove; 6. connecting hole; 7. block; 8. limit pile. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] See also Figures 1 to 3 The utility model provides a technical solution: an overload-resistant thermocouple temperature sensor, comprising a sensor body 1, a protective cover 2 is arranged on the outside of the sensor body 1, the protective cover 2 has built-in insulating tips and a five-layer membrane structure, the insulating tips and the five-layer membrane structure both adopt the structure of the prior art mentioned in the background technology, the protective cover 2 in the prior art is connected to the positioning plate with limiting holes on the outside through the threads on itself.

[0025] In the present technical scheme, it also includes a switching bridge plate 3 and a combined wire sleeve 4. The switching bridge plate 3 is a waist-shaped plate. A waist-shaped slide 5 is provided on one side of the switching bridge plate 3. The waist-shaped slide 5 is a waist-shaped groove structure. The bottom of the waist-shaped slide 5 is provided with connecting holes 6 at both ends. The arc parts at both ends of the waist-shaped slide 5 are coaxial with the connecting holes 6. The switching bridge plate 3 is fixedly sleeved on the outside of the protective sleeve 2 through one of the connecting holes 6, that is, the switching bridge plate 3 and the protective sleeve 2 are in a fixed connection state.

[0026] The inner diameter of the combined wire sleeve 4 is the same as the outer diameter of the protective sleeve 2. The combined wire sleeve 4 is formed by connecting two independent semicircular wire sleeves 41. During specific processing, the external thread can be processed on a sleeve, and then the processed combined wire sleeve 4 is cut from the middle using a cutting tool. After the two cut semicircular wire sleeves 41 are buckled on the protective sleeve 2, a complete combined wire sleeve 4 will be formed.

[0027] Among them, the outer peripheral wall of the semicircular silk sleeve 41 is fixedly connected with a stopper 7 near one end, and the inner peripheral wall of the waist-shaped slideway 5 is provided with a waist-shaped limiting groove 51 used in conjunction with the stopper 7. The combined silk sleeve 4 is limited in the waist-shaped limiting groove 51 by the stopper 7, so that the combined silk sleeve 4 is connected to the switching bridge plate 3. Preferably, the thickness of the stopper 7 is equal to the height of the waist-shaped limiting groove 51. This setting can effectively avoid the situation where the gap between the combined silk sleeve 4 and the waist-shaped limiting groove 51 is too large. It should be noted that when the two semicircular silk sleeves 41 rotate to the stopper 7 thereon to disengage from the waist-shaped limiting groove 51, the semicircular silk sleeves 41 can be conveniently disassembled, and vice versa, the two semicircular silk sleeves 41 can be docked with the protective sleeve 2, so that when the combined silk sleeve 4 is located in the waist-shaped limiting groove 51 at one end away from the protective sleeve 2, the combined silk sleeve 4 can be directly connected to the positioning plate with limiting holes in the outside.

[0028] Furthermore, both ends of the stopper 7 extend to a position close to the joint end face of the semicircular wire sleeve 41, and a limit pile 8 is provided through the back of the switching bridge plate 3. Specifically, a guide hole 31 having the same outer diameter as the limit pile 8 is provided through the back of the switching bridge plate 3. The limit pile 8 is located on the center line of the waist-shaped slideway 5 and close to the connecting hole 6. The limit pile 8 and the switching bridge plate 3 are slidably matched and used in conjunction with one end of the stopper 7. That is to say, after one end of the limit pile 8 enters the waist-shaped slideway 5 and is located between the stoppers 7 on the two semicircular wire sleeves 41, the combined wire sleeve 4 cannot rotate relative to itself at this time, and is in a fixed connection state with the protective sleeve 2 under the restriction of the waist-shaped limit groove 51.

[0029] In this embodiment, the joint surfaces on the semicircular wire sleeve 41 are respectively provided with plug-in grooves 412 and plug-in columns 413. The two combined wire sleeves 4 form a complete combined wire sleeve 4 through the plug-in cooperation of the plug-in grooves 412 and the plug-in columns 413. The inner diameter of the plug-in grooves 412 and the outer diameter of the plug-in columns 413 are equal. This arrangement can prevent the problem of misalignment of the two semicircular wire sleeves 41 after docking, thereby ensuring the integrity of the external threads of the semicircular wire sleeves 41.

[0030] In this embodiment, a layer of protective rubber pad 411 is bonded to the inner wall of the semicircular wire sleeve 41 . This arrangement can effectively prevent the semicircular wire sleeve 41 from wearing the protective sleeve.

[0031] Working principle: when it is necessary to connect the protective sleeve 2 and the external positioning plate with limiting holes, insert one end of the two semicircular wire sleeves 41 with the stop block 7 into the waist-shaped slide 5, and then slide its inner arc surface toward the protective sleeve 2 and in the direction of the protective sleeve 2. When the semicircular wire sleeve 41 fits against the outer wall of the protective sleeve 2, twist the semicircular wire sleeve 41 with a twisting angle of 180 degrees, and then install the remaining semicircular wire sleeve 41 in this way. After the two semicircular wire sleeves 41 are combined, twist the combined wire sleeve 4 with a twisting angle of 90 degrees. At this time, manually push the limit pile 8, the limit pile 8 is located between the two stop blocks 7, and the combined wire sleeve 4 is limited. Finally, the combined wire sleeve 4 is installed on the positioning plate through the external nut.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An overload-resistant thermocouple temperature sensor, comprising a sensor body (1), wherein a protective cover (2) is disposed outside the sensor body (1), wherein: It also includes a switching bridge plate (3) and a combined silk sleeve (4), wherein a waist-shaped slideway (5) is provided on one side of the switching bridge plate (3), and connecting holes (6) are provided at both ends of the bottom of the waist-shaped slideway (5), and the switching bridge plate (3) is fixedly sleeved on the outside of the protective sleeve (2) through one of the connecting holes (6), and the inner diameter of the combined silk sleeve (4) is the same as the outer diameter of the protective sleeve (2), and the combined silk sleeve (4) is formed by connecting two independent semicircular silk sleeves (41), and the outer peripheral wall of the semicircular silk sleeve (41) is fixedly connected with a stopper (7) near one end, and the inner peripheral wall of the waist-shaped slideway (5) is provided with a waist-shaped limiting groove (51) used in conjunction with the stopper (7).

2. The overload-resistant thermocouple temperature sensor according to claim 1, characterized in that: The two ends of the stopper (7) extend to a position close to the spliced ​​end surface of the semicircular wire sleeve (41), and a limit pile (8) is provided through the back of the switching bridge plate (3). The limit pile (8) is located on the center line of the waist-shaped slideway (5) and close to the connecting hole (6). The limit pile (8) and the switching bridge plate (3) are slidably matched and used in conjunction with one end of the stopper (7).

3. The overload-resistant thermocouple temperature sensor according to claim 2, characterized in that: A guide hole (31) having the same outer diameter as the limit pile (8) is formed through the back of the switching bridge plate (3).

4. The overload-resistant thermocouple temperature sensor according to claim 1, characterized in that: The splicing surfaces on the semicircular silk sleeve (41) are respectively provided with plug-in grooves (412) and plug-in posts (413); the two combined silk sleeves (4) form a complete combined silk sleeve (4) through the plug-in cooperation of the plug-in grooves (412) and the plug-in posts (413).

5. The overload-resistant thermocouple temperature sensor according to claim 1, characterized in that: The thickness of the stopper (7) is equal to the height of the waist-shaped limiting groove (51).

6. The overload-resistant thermocouple temperature sensor according to claim 1, characterized in that: The arc parts at both ends of the waist-shaped slideway (5) and the connecting hole (6) are coaxial.

7. The overload-resistant thermocouple temperature sensor according to claim 1, characterized in that: A layer of protective rubber pad (411) is bonded to the inner peripheral wall of the semicircular wire sleeve (41).

Images