Embedded thermal resistor

Abstract

The utility model discloses an embedded thermal resistor which comprises a temperature measurement thermal resistor body, a protective sleeve sleeved outside the temperature measurement thermal resistor body and an armored wire connected with the temperature measurement thermal resistor body, a sealing clamp is sleeved on the armored wire, and a sealing base is sleeved on the sealing clamp; the sealing base comprises a threaded joint, an oil-resistant rubber plug, a pressing gasket and a threaded sleeve, one end, facing the temperature measurement thermal resistor body, of the threaded joint is used for mounting and fixing, the other end of the threaded joint is connected with the threaded sleeve, the oil-resistant rubber plug is arranged in the threaded joint, and the pressing gasket is arranged in the threaded joint and located between the oil-resistant rubber plug and the threaded sleeve; and the sealing hoop penetrates through the oil-resistant rubber plug and the pressing gasket. The sealing base is arranged on the sealing hoop in a sleeved mode, the oil-resistant rubber plug is tightly attached to the periphery of the sealing hoop after being extruded and deformed, sealing between the sealing hoop and the sealing base is achieved, and lubricating oil is prevented from flowing out through a gap between the sealing hoop and the sealing base.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal resistors, in particular to an embedded thermal resistor. Background Art

[0002] At present, in the industrial production process, especially in the production processes of oil refining and chemical industries and power generation enterprises, there are many bearing bushes of rotating system devices, especially the bearing bushes and thrust bearings of large high-speed blowers, steam turbines, compressors, and gas turbines, and a thermal resistor temperature measuring device is required for temperature measurement.

[0003] Chinese Patent with the authorization announcement number CN202188923U discloses a special thermal resistor for bearing bush temperature measurement, which includes a temperature measuring thermal resistor body, a protective sleeve sleeved outside the temperature measuring thermal resistor body, and an armored wire connected to the temperature measuring thermal resistor body. The outer sleeve of the armored wire is a stainless steel flexible hose. The end of the outer sleeve of the armored wire is sleeved outside the protective sleeve of the temperature measuring thermal resistor body. A spring clip is arranged outside the end of the outer sleeve. The outer sleeve and the protective sleeve are fixedly connected through the spring clip. An oil leakage blocking joint is sleeved on the armored wire. The oil leakage blocking joint includes a threaded joint, an oil-resistant rubber plug, a pressing metal gasket, and a threaded sleeve. The left end of the threaded joint is connected to the unit where the bearing bush is located. The right end of the threaded joint is connected to the threaded sleeve through threads. The oil-resistant rubber plug is arranged inside the right end of the threaded joint. The pressing metal gasket is arranged between the right end face of the oil-resistant rubber plug and the threaded sleeve. The through hole in the center of the threaded joint includes a small cylindrical through hole on the left side and a frustum-shaped through hole on the right side. The small end of the frustum-shaped through hole is connected to the small cylindrical through hole, and the aperture of the small end of the frustum-shaped through hole is larger than the aperture of the small cylindrical through hole. The armored wire extends into the small cylindrical through hole. The side surface of the oil-resistant rubber plug is an inclined conical surface, and the oil-resistant rubber plug is located in the frustum-shaped through hole. Since the outer sleeve is a stainless steel flexible hose, its surface is easily deformed, resulting in a gap between the outer sleeve and the oil-resistant rubber plug. Therefore, the lubricating oil in the unit will flow out through the gap between the outer sleeve and the oil-resistant rubber plug, causing serious running, leaking, dripping, and spilling phenomena. Content of the Utility Model

[0004] The utility model provides an embedded thermal resistor to solve the technical problem of running, leaking, dripping, and spilling existing in the existing thermal resistor.

[0005] To achieve the above object, the technical solution of the utility model is as follows:

[0006] Embedded thermal resistor, comprising: a temperature-measuring thermal resistor body, a protective sleeve sleeved outside the temperature-measuring thermal resistor body, and an armored wire connected to the temperature-measuring thermal resistor body. An armored wire is sleeved with a sealing clamp, and a sealing base is sleeved on the sealing clamp; the sealing base includes: a threaded joint, an oil-resistant rubber plug, a pressing gasket and a threaded sleeve. One end of the threaded joint facing the temperature-measuring thermal resistor body is used for installation and fixation, and the other end is connected to the threaded sleeve. The oil-resistant rubber plug is arranged in the threaded joint, and the pressing gasket is arranged in the threaded joint and located between the oil-resistant rubber plug and the threaded sleeve; the sealing clamp passes through the oil-resistant rubber plug and the pressing gasket.

[0007] Preferably, the outer peripheral surface of the oil-resistant rubber plug is a conical surface, and the large-diameter end of the oil-resistant rubber plug faces the threaded sleeve.

[0008] Preferably, an adjusting gasket is arranged on one side of the oil-resistant rubber plug away from the pressing gasket, and the sealing clamp passes through the adjusting gasket.

[0009] Preferably, a plurality of through holes are formed in the pressing gasket and the adjusting gasket, and the inner diameter of the through holes matches the outer diameter of the sealing clamp.

[0010] Preferably, the threaded sleeve is screwed into the threaded joint by thread connection; the pressing gasket and the inner wall of the threaded joint are connected by a profile surface.

[0011] Preferably, the gap between the sealing clamp and the armored wire is filled with insulating glue.

[0012] Preferably, two sections of heat shrinkable tubes are installed on the armored wire and respectively penetrate into the sealing clamp from both ends of the sealing clamp.

[0013] Preferably, at least two opposite planes are machined on the outer peripheral surface at both ends of the sealing clamp.

[0014] Preferably, the protective layer of the armored wire includes a stainless steel braided layer and a Teflon sheath wrapped outside the stainless steel braided layer.

[0015] Preferably, the gap between the temperature-measuring thermal resistor body and the protective sleeve is filled with insulating glue.

[0016] Beneficial effects:

[0017] The embedded thermal resistor disclosed in this application realizes the sealing between the sealing clamp and the sealing base by sleeving the sealing base on the sealing clamp. After the oil-resistant rubber plug is extruded and deformed, it closely fits with the outer periphery of the sealing clamp, avoiding the lubricating oil from flowing out through the gap between the sealing clamp and the sealing base. Description of the drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of the embedded thermal resistor of the present invention without a sealed base;

[0020] Figure 2 Structural schematic diagram of the assembly of the sealed clamp and the sealed base of the embedded thermal resistor of the present invention;

[0021] Figure 3 Longitudinal sectional view of multiple embedded thermal resistors of the present invention after being installed in the sealed base;

[0022] Figure 4 Transverse sectional view of multiple embedded thermal resistors of the present invention after being installed in the sealed base;

[0023] Figure 5 Longitudinal sectional view of the assembly of the sealed clamp and the armored wire of the embedded thermal resistor of the present invention;

[0024] Figure 6 Transverse sectional view of the assembly of the sealed clamp and the armored wire of the embedded thermal resistor of the present invention.

[0025] 1. Temperature-measuring thermal resistor body; 2. Protection sleeve; 3. Armored wire; 31. Stainless steel braided layer; 32. Teflon sheath; 4. Sealed clamp; 5. Sealed base; 51. Threaded joint; 52. Oil-resistant rubber plug; 53. Compression gasket; 54. Threaded sleeve; 55. Adjusting gasket; 501. Through hole; 6. Insulating glue; 7. Heat shrinkable tube. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0027] Embedded thermal resistor, in combination with Figure 1 、 Figure 2 and Figure 3As shown in the figure, it includes a temperature-measuring thermal resistor body 1, a protective sleeve 2 sleeved outside the temperature-measuring thermal resistor body 1, and an armored wire 3 connected to the temperature-measuring thermal resistor body 1. A sealing clamp 4 is sleeved on the armored wire 3, and a sealing base 5 is sleeved on the sealing clamp 4. The sealing base 5 includes a threaded joint 51, an oil-resistant rubber plug 52, a pressing gasket 53, and a threaded sleeve 54. One end of the threaded joint 51 facing the temperature-measuring thermal resistor body 1 is used for installation and fixation, and the other end is connected to the threaded sleeve 54. The oil-resistant rubber plug 52 is arranged inside the threaded joint 51, and the pressing gasket 53 is arranged inside the threaded joint 51 and located between the oil-resistant rubber plug 52 and the threaded sleeve 54. The sealing clamp 4 passes through the oil-resistant rubber plug 52 and the pressing gasket 53. After the threaded joint 51 is installed on the threaded sleeve 54, the end of the threaded sleeve 54 pushes the pressing gasket 53, and the pressing gasket 53 squeezes the oil-resistant rubber plug 52. After the oil-resistant rubber plug 52 is deformed by the force, it closely fits with the outer circumference of the sealing clamp 4, eliminating the gap between the oil-resistant rubber plug 52 and the sealing clamp 4, realizing the seal between the sealing clamp 4 and the oil-resistant rubber plug 52, and preventing the lubricating oil from flowing out through the gap between the oil-resistant rubber plug 52 and the sealing clamp 4. Therefore, the problems of running, leaking, dripping, and leaking of the existing thermal resistor are solved.

[0028] Preferably, the outer peripheral surface of the oil-resistant rubber plug 52 is a conical surface, and the large-diameter end of the oil-resistant rubber plug 52 faces the threaded sleeve 54, enhancing the fitting effect between the oil-resistant rubber plug 52 and the sealing clamp 4 after being squeezed.

[0029] Preferably, an adjusting gasket 55 is provided on the side of the oil-resistant rubber plug 52 away from the pressing gasket 53, and the sealing clamp 4 passes through the adjusting gasket 55. The adjusting gasket 55 is added to optimize the force on both ends of the oil-resistant rubber plug 52 and prevent the small-diameter end of the oil-resistant rubber plug 52 from being squeezed into the inner hole of the threaded joint 51 after being pressed.

[0030] Preferably, in combination Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a plurality of through holes 501 are provided on the pressing gasket 53 and the adjusting gasket 55. The inner diameter of the through holes 501 matches the outer diameter of the sealing clamp 4 for a plurality of embedded thermal resistors to pass through.

[0031] Preferably, the threaded sleeve 54 is screwed into the threaded joint 51 by thread connection; the pressing gasket 53 and the inner wall of the threaded joint 51 are connected by a profile surface to ensure that the pressing gasket 53 can move along the axial direction of the threaded joint 51 and prevent the pressing gasket 53 from rotating. When the threaded sleeve 54 is screwed in, the end of the threaded sleeve 54 pushes the pressing gasket 53 to move, and the pressing gasket 53 further squeezes the oil-resistant rubber plug 52.

[0032] Specifically, the pressing gasket 53 is a circular gasket with three supporting claws fixedly arranged on its outer periphery. Three guiding grooves are axially formed on the inner wall of the threaded joint 51, and the three supporting claws are respectively clamped into the three guiding grooves and can slide along the guiding grooves.

[0033] Preferably, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 , the gap between the sealing clamp 4 and the armored wire 3 is filled with insulating glue 6 to prevent the lubricating oil from flowing out through the gap between the sealing clamp 4 and the armored wire 3.

[0034] Preferably, two heat shrinkable tubes 7 are installed on the armored wire 3 and respectively penetrate into the sealing clamp 4 from both ends of the sealing clamp 4 to enhance the sealing effect.

[0035] Preferably, at least two opposite planes are machined on the outer peripheral surfaces at both ends of the sealing clamp 4 for closing the mouth by pliers.

[0036] Specifically, the sealing clamp 4 can be made of stainless steel. The outer peripheral surfaces at both ends of the sealing clamp 4 are machined into hexagons. By applying pressure to both ends of the sealing clamp 4, the two ends of the sealing clamp 4 are deformed to close the mouth, enhancing the sealing effect at the ends of the sealing clamp 4.

[0037] Specifically, when installing the sealing clamp 4, after removing the protective layer at the corresponding position on the armored wire 3, the sealing clamp 4 is sleeved. Two holes are opened on the sealing clamp 4, one for pouring glue and the other for exhausting air.

[0038] Preferably, the protective layer of the armored wire 3 includes a stainless steel braided layer 31 and a Teflon sheath 32 wrapped outside the stainless steel braided layer 31.

[0039] Preferably, the gap between the temperature measuring thermal resistor body 1 and the protective sleeve 2 is filled with insulating glue 6 to seal the gap between the temperature measuring thermal resistor body 1 and the protective sleeve 2, further preventing the lubricating oil from entering the protective sleeve 2 through the gap between the protective sleeve 2 and the Teflon sheath 32.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Embedded thermal resistor, including: A temperature measuring thermal resistor (1), a protective sleeve (2) sleeved outside the temperature measuring thermal resistor (1), and an armored wire (3) connected to the temperature measuring thermal resistor (1), characterized in that a sealing clamp (4) is sleeved on the armored wire (3), and a sealing base (5) is sleeved on the sealing clamp (4); the sealing base (5) comprises: a threaded joint (51), an oil-resistant rubber plug (52), a compression gasket (53) and a threaded sleeve (54); the threaded joint (51) is used for installation and fixation at one end facing the temperature measuring thermal resistor (1), and the other end is connected to the threaded sleeve (54); the oil-resistant rubber plug (52) is arranged in the threaded joint (51), and the compression gasket (53) is arranged in the threaded joint (51) and is located between the oil-resistant rubber plug (52) and the threaded sleeve (54); the sealing clamp (4) passes through the oil-resistant rubber plug (52) and the compression gasket (53).

2. The embedded thermal resistor according to claim 1, characterized in that: The outer peripheral surface of the oil-resistant rubber plug (52) is a conical surface, and the large diameter end of the oil-resistant rubber plug (52) faces the threaded sleeve (54).

3. The embedded thermal resistor according to claim 1, characterized in that: An adjusting gasket (55) is provided on the side of the oil-resistant rubber plug (52) away from the pressing gasket (53), and the sealing clamp (4) passes through the adjusting gasket (55).

4. The embedded thermal resistor according to claim 3, characterized in that: The compression gasket (53) and the adjustment gasket (55) are provided with a plurality of through holes (501), and the inner diameter of the through holes (501) matches the outer diameter of the sealing clamp (4).

5. The embedded thermal resistor according to claim 1, characterized in that: The threaded sleeve (54) is screwed into the threaded joint (51) through a threaded connection; the compression gasket (53) and the inner wall of the threaded joint (51) are connected by profile connection.

6. The embedded thermal resistor according to claim 1, characterized in that: The gap between the sealing clamp (4) and the armored conductor (3) is filled with insulating glue (6).

7. The embedded thermal resistor according to claim 6, characterized in that: The armored conductor (3) is provided with two sections of heat shrink tubes (7) which are respectively inserted into the sealing clamp (4) from both ends of the sealing clamp (4).

8. The embedded thermal resistor according to claim 7, characterized in that: The outer circumferential surfaces at both ends of the sealing clamp (4) are processed to have at least two opposite planes.

9. The embedded thermal resistor according to claim 1, characterized in that: The protective layer of the armored conductor (3) comprises a stainless steel braided layer (31) and a Teflon sheath (32) wrapped outside the stainless steel braided layer (31).

10. The embedded thermal resistor according to claim 1, characterized in that: The gap between the temperature measuring thermal resistor (1) and the protective sleeve (2) is filled with insulating glue (6).

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