A multi-point double high-pressure flexible temperature sensor

Abstract

The application discloses a kind of multipoint double high-pressure flexible temperature sensor, comprising: first process connecting piece, sealed cavity, sealing positioning piece and prevent internal leakage structure, one end of first process connecting piece is connected with threaded joint, threaded joint connects second process connecting piece;Sealed cavity is connected with the other end of first process connecting piece at one end;One end of sealing positioning piece is connected with the other end of sealed cavity, detection assembly is connected on the outer side wall of sealing positioning piece, and detection assembly is communicated with sealed cavity by air hole on sealing positioning piece;One end of prevent internal leakage structure is connected with the other end of sealing positioning piece, and the other end of prevent internal leakage structure is sealingly connected with the outer side wall of compensation cable, armored couplet is connected with compensation cable in second process connecting piece, first process connecting piece, sealed cavity, sealing positioning piece and prevent internal leakage structure, the present application adopts three-stage connection sealing, and structure is reasonable, safe and reliable, suitable for installation and use under various reactor special working condition environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature sensor connection, in particular to a multi-point double flexible temperature sensor suitable for internal temperature measurement of high-pressure gasification furnaces and reactors. BACKGROUND

[0002] High-pressure thermocouples / resistors used in oil refining and chemical industry reactors are generally connected by flanges, and high-pressure threaded connections are suitable for special working conditions with limited space. The threaded connection structure is also limited by volume and weight requirements, and cannot meet the measurement point number of multiple double types.

[0003] Chinese patent CN201420668580.7 discloses a multi-branch core-drawing type high-pressure flexible temperature sensor, which has fast thermal response speed and high pressure resistance, but its sealing connection is unstable, and when the armor breaks, the medium can easily leak from the cold end through the armored pipe.

[0004] Therefore, how to provide a multi-point double temperature sensor suitable for temperature measurement in a small space under special working conditions is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the present application provides a multi-point double high-pressure flexible temperature sensor, which has the characteristics of small required installation space, does not affect normal production when the standby measurement point is used, ensures the usability of the measurement point, is stable in use, ensures stable operation, has good sealing effect, and prevents medium leakage.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: a multi-point double high-pressure flexible temperature sensor, comprising:

[0007] A first process connection piece is provided with a plurality of threading holes, one end of the first process connection piece is connected with a threaded joint, and the threaded joint is connected with a second process connection piece;

[0008] A sealing cavity is sealingly connected with the other end of the first process connection piece;

[0009] A sealing positioning piece is provided with a wire hole penetrating through both ends thereof, one end of the sealing positioning piece is sealingly connected with the other end of the sealing cavity, the sealing positioning piece is provided with an air passing hole, a detection assembly is fixedly connected to the outer side wall of the sealing positioning piece, the detection assembly is in communication with one end of the air passing hole, and the other end of the air passing hole is in communication with the sealing cavity;

[0010] The anti-internal leakage structure is in sealing connection with one end of the sealing positioning piece, and the other end of the anti-internal leakage structure is in sealing connection with the outer side wall of the compensation cable.

[0011] The application has the following beneficial effects: the application forms a three-stage sealing, the first-stage sealing is the sealing connection between the first process connecting piece and the sealing cavity, and the sealing connection between the independent armored pairs and the sealing cavity; the armored pairs are double-core pairs, which can improve the use stability; the second-stage sealing is the sealing connection between the sealing cavity and the sealing positioning piece, the independent armored pairs pass through the wire hole and are sealed with the sealing positioning piece, and the detection assembly is arranged to detect whether the sealing cavity leaks; the third-stage sealing is the anti-internal leakage structure, which can prevent the medium from leaking from the cold end through the armored tube when the armored sleeve is broken.

[0012] Preferably, one end of the sealing cavity is in sealing connection with the other end of the first process connecting piece through argon arc welding, and the other end of the sealing cavity is in sealing connection with one end of the sealing positioning piece through argon arc welding; the sealing cavity is a conical sealing cavity, a plurality of connecting holes are arranged at one end of the sealing cavity, the double-core armored pairs are variable-diameter armored pairs, a sealing brazing layer is arranged between the sleeve wall of the variable-diameter armored pairs and the inner hole wall of the corresponding connecting hole, and the sleeve wall of the variable-diameter armored pairs is sealingly welded with both ends of the wire hole.

[0013] Preferably, the anti-internal leakage structure comprises an anti-internal leakage connecting cylinder, a pressing screw connecting piece and a wire sealing sleeve, the other end surface of the sealing positioning piece is provided with an annular groove, one end of the anti-internal leakage connecting cylinder is fixedly connected in the annular groove, the inner side wall of the other end of the anti-internal leakage connecting cylinder is provided with a stepped clamping groove, one end of the pressing screw connecting piece is threadedly connected in the stepped clamping groove, and one end of the wire sealing sleeve is threadedly connected with the other end of the pressing screw connecting piece.

[0014] Preferably, a plurality of stainless steel pressing plates are connected in the stepped clamping groove, a plurality of through holes are arranged on each of the stainless steel pressing plates, the variable-diameter armored pairs are arranged in the through holes, a graphite sealing piece is arranged between adjacent two stainless steel pressing plates, and an O-shaped stainless steel sealing ring is arranged between one end of the pressing screw connecting piece and the stainless steel pressing plate close to the one end.

[0015] Preferably, the variable-diameter armored doublet includes a first section and a second section, the outer diameter of the first section is larger than that of the second section, the second section corresponds to the connection with the compensation cable through the stainless steel pressing plate and the graphite sealing element, the cold end of the variable-diameter armored doublet corresponds to the small-diameter end of the variable-diameter armored doublet, the compensation cable is located inside the wire passing sealing sleeve, a sealing rubber layer is arranged between the inner wall of the wire passing sealing sleeve and the outer wall of the compensation cable, and the wire passing fixing head is connected to the end of the wire passing sealing sleeve away from the pressing screw element.

[0016] Preferably, the stainless steel pressing plate is provided with a limiting groove on the side close to the O-shaped stainless steel sealing ring, and the O-shaped stainless steel sealing ring is connected in the limiting groove.

[0017] Preferably, the detection assembly includes a valve group and a leak detection instrument, one end of the valve group is fixedly connected to the outer wall of the sealing positioning element, the other end of the valve group is fixedly connected to the leak detection instrument, and the leak detection instrument is in communication with the sealing cavity.

[0018] Preferably, a plurality of bolt holes are arranged on the outer wall of the threaded joint, positioning bolts are connected in the bolt holes, and the ends of the positioning bolts are abutted and fastened with the outer wall of the second process connecting element.

[0019] Preferably, the end portions close to each other of the first process connecting element and the second process connecting element are provided with lens body joint surfaces, a lens body is sealingly connected between the first process connecting element and the second process connecting element, and the first process connecting element and the second process connecting element are fastened by using the threaded joint.

[0020] Preferably, the two ends of the lens body are provided with joint curved surfaces which are sealingly attached to the lens body joint surfaces, a center hole is arranged in the lens body, and a variable-diameter armored doublet pipe bundle is arranged in the center hole. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a whole structure diagram of the multi-point double high-pressure flexible temperature sensor.

[0022] Fig. 2 It is a schematic diagram of the anti-leakage structure of the multi-point double high-pressure flexible temperature sensor.

[0023] 1 leak detection instrument, 2 valve group, 3 sealing positioning element, 4 sealing cavity, 5 compensation cable, 6 wire passing fixing head, 7 wire passing sealing sleeve, 8 pressing screw element, 9 O-shaped stainless steel sealing ring, 10 anti-leakage connecting cylinder, 11 first process connecting element, 12 threaded joint, 13 positioning bolt, 14 lens body, 15 second process connecting element, 16 stainless steel pressing plate, 17 graphite sealing element, 18 variable-diameter armored doublet, and 19 air passing hole. DETAILED DESCRIPTION

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] See the appendix of this invention. Figs. 1-2 According to an embodiment of the present invention, a multi-point dual-type high-pressure flexible temperature sensor is provided, comprising multiple dual-type sensors, each including:

[0026] The first process connector 11 has multiple through holes, and one end of the first process connector 11 is connected to a threaded connector 12, which is connected to the second process connector 15; the connection between the first process connector and the second process connector is achieved through the threaded connector.

[0027] The sealing cavity 4 has one end sealed to the other end of the first process connector 11;

[0028] The sealing positioning component 3 has a through hole that passes through both ends of it. One end of the sealing positioning component 3 is sealed to the other end of the sealing cavity 4. The sealing positioning component 3 has an air vent 19. A detection component is fixedly connected to the outer wall of the sealing positioning component 3. The detection component is connected to one end of the air vent 19, and the other end of the air vent 19 is connected to the sealing cavity 4. The detection component detects whether there is air leakage by communicating with the sealing cavity through the air vent.

[0029] The internal leakage prevention structure has one end sealed to the other end of the sealing positioning component 3, and the other end sealed to the outer wall of the compensation cable 5. A double-core armored coupler wire is threaded through the wire hole, passing through the second process connector 15, the first process connector 11, the sealing cavity 4, the sealing positioning component 3, and connecting to the compensation cable in the internal leakage prevention structure. A single double-core armored coupler wire ensures the use of one measuring wire, maintains stable and reliable temperature measurement in the measurement area, and prevents measurement work from stopping due to the failure of one measuring wire.

[0030] The device has three sealing structures, one is that the first process connecting piece and the sealing cavity are welded by argon arc welding, and a plurality of independent variable-diameter armored wires are sealed with the sealing cavity by gold-nickel brazing, the second is that the sealing cavity and the sealing positioning piece are welded by argon arc welding, and a plurality of independent armored wires are sealed with the sealing positioning piece by gold-nickel brazing, and the third is an internal leakage prevention structure, which includes an internal leakage prevention connecting cylinder, a stainless steel pressing plate with a plurality of holes, a graphite sealing piece with a plurality of holes, a pressing screw piece, a wire passing sealing sleeve and a wire fixing head. When the sheath breaks, the medium can be prevented from leaking from the cold end through the armored pipe.

[0031] In other embodiments, one end of the sealing cavity 4 is connected to the other end of the first process connecting piece 11 by argon arc welding, and the other end of the sealing cavity 4 is connected to one end of the sealing positioning piece 3 by argon arc welding; the sealing cavity 4 is a tapered sealing cavity, a plurality of connecting holes are formed in one end of the sealing cavity 4, the double-core armored wire is a variable-diameter armored wire 18, a sealing gold-nickel brazing layer is arranged between the outer sleeve wall of the variable-diameter armored wire 18 and the inner hole wall of the corresponding connecting hole, and the outer sleeve wall of the variable-diameter armored wire 18 is gold-nickel brazed to the two ends of the wire passing hole.

[0032] In other specific embodiments, the internal leakage prevention structure includes an internal leakage prevention connecting cylinder 10, a pressing screw piece 8 and a wire passing sealing sleeve 7, the other end surface of the sealing positioning piece 3 is provided with an annular groove, one end of the internal leakage prevention connecting cylinder 10 is fixedly connected in the annular groove, the other end inner side wall of the internal leakage prevention connecting cylinder 10 is provided with a stepped clamping groove, one end of the pressing screw piece 8 is threadedly connected in the stepped clamping groove, and one end of the wire passing sealing sleeve 7 is threadedly connected with the other end of the pressing screw piece 8.

[0033] In other embodiments, a plurality of stainless steel pressing plates 16 are connected in the stepped clamping groove, a plurality of through holes are formed in each of the stainless steel pressing plates 16, a variable-diameter armored wire is arranged in each through hole, a graphite sealing piece 17 is arranged between adjacent two stainless steel pressing plates, the stainless steel pressing plate and the graphite sealing piece are arranged to achieve a sealing effect, and an O-shaped stainless steel sealing ring 9 is arranged between one end of the pressing screw piece 8 and the stainless steel pressing plate close to the side thereof.

[0034] In other embodiments, the variable-diameter armored pair wire 18 includes a first section and a second section, the outer diameter size of the first section is larger than that of the second section, the variable-diameter armored pair wire is a Φ6 outer diameter to Φ2 outer diameter structure, the Φ6 outer diameter part is liquid connected, the outer wall is thicker and can withstand larger pressure, the Φ2 outer diameter part has better sealing effect when sealed by a stainless steel pressing plate-graphite sealing element-stainless steel pressing plate; the second section is connected with the compensation cable 5 through the stainless steel pressing plate 16 and the graphite sealing element 17, the cold end of the variable-diameter armored pair wire 18 corresponds to the small-diameter end of the variable-diameter armored pair wire, the compensation cable 5 is located inside the wire passing sealing sleeve 7, a sealing rubber layer is arranged between the inner wall of the wire passing sealing sleeve 7 and the outer side wall of the compensation cable 5, and the wire passing fixing head 6 is connected to the end of the wire passing sealing sleeve 7 away from the pressing screw element 8. After the wire passing sealing sleeve and the pressing screw element are threadedly connected, glue is injected, and the wire passing fixing head is pressed tightly.

[0035] In other specific embodiments, the stainless steel pressing plate 16 is provided with a limiting groove on the side close to the O-shaped stainless steel sealing ring 9, and the O-shaped stainless steel sealing ring 9 is connected in the limiting groove. The pressing screw element presses the stainless steel pressing plate-graphite sealing element-stainless steel pressing plate through the O-shaped stainless steel sealing ring, which avoids the damage to the Φ2 outer diameter part of the variable-diameter armored pair wire caused by the rotation of the stainless steel pressing plate when the stainless steel pressing plate is directly pressed.

[0036] The stainless steel pressing plate and the graphite sealing element are provided with completely same small holes, and the inner diameter of the small hole is only for the Φ2 outer diameter part of the variable-diameter armored pair wire to pass through.

[0037] The sealing cavity and the Φ6 outer diameter part of the variable-diameter armored pair wire are gold-nickel brazed and welded, the gold-nickel brazing has less influence on the pair wire and will not cause deformation damage of the workpiece, the gold-nickel brazing is suitable for welding workpieces with small welding space, and has good sealing effect.

[0038] In other embodiments, the detection assembly includes a valve group 2 and a leak detection instrument 1, one end of the valve group 2 is fixedly connected with the outer side wall of the sealing positioning piece 3, the other end of the valve group 2 is fixedly connected with the leak detection instrument 1, and the leak detection instrument 1 is communicated with the sealing cavity 4. The sealing positioning piece is provided with a thread for connecting the valve group, the thread is communicated with the sealing cavity through an air passing hole, the other end of the valve group is connected with the leak detection instrument, the medium leakage enters the conical sealing cavity, the pressure gauge changes in pressure, thereby playing a role of leak detection and alarm.

[0039] In other embodiments, a plurality of bolt holes are formed in the outer side wall of the threaded joint 12, positioning bolts 13 are connected in the bolt holes, and the end portions of the positioning bolts 13 abut and fasten the outer side wall of the second process connecting piece 15. The positioning bolts are positioned and stopped, the first process connecting piece and the second process connecting piece are composed of a lens body to form a lens body seal.

[0040] The threaded joint is a high-pressure threaded connecting piece, which is trapezoidal thread with the second process connecting piece, can bear larger force, is tightly fixed by positioning bolts, and will not be loose or decoupled.

[0041] Specifically, the end parts of the first process connecting piece 11 and the second process connecting piece 15 are provided with lens body connecting surfaces, the lens body 14 is sealingly connected between the first process connecting piece 11 and the second process connecting piece 15, and the first process connecting piece 11 and the second process connecting piece 15 are fastened by the threaded joint 12.

[0042] More specifically, the two ends of the lens body 14 are provided with connecting curved surfaces which are sealingly attached to the lens body connecting surfaces, the lens body 14 is provided with a center hole, and a variable-diameter armored double-filament tube bundle is arranged in the center hole.

[0043] Compared with the prior art, the beneficial effects of the present application are:

[0044] 1. The single-branch double-type thermocouple / resistance of the present application adopts high-pressure threaded connection, has the characteristics of small required installation space, is extremely suitable for high-pressure working conditions, and is difficult to change the reactor pipe size. The single-branch double-type thermocouple / resistance is more convenient to set the measurement point position, has a wider temperature measurement area, and is easy to install. The double-type measurement point ensures that after one measurement point fails, the online backup measurement point can be replaced, without affecting normal production. At the same time, the thermocouple sheath has a relatively thick wall thickness, which can withstand relatively high pressure.

[0045] 2. The present application adopts a three-sealing structure, which maximizes the safety operation of the thermocouple / resistance, has good sealing effect, and prevents medium leakage.

[0046] 3. The present application adopts an anti-leakage structure, which can effectively prevent medium leakage through the inside of the sheath when the sheath is broken.

[0047] For the device and use method disclosed in the embodiments, since they correspond to the method disclosed in the embodiments, the description is relatively simple, and the related parts are referred to the method part.

[0048] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multipoint double high pressure flexible temperature sensor, characterized in that, The utility model relates to a kind of sealing structure of compensating cable, including: First process connector (11), multiple threading holes are provided on the first process connector (11), one end of the first process connector (11) is connected with threaded joint (12), and the threaded joint (12) is connected with second process connector (15); Sealing cavity (4), one end of the sealing cavity (4) is sealingly connected with the other end of first process connector (11); Sealing positioning member (3), the sealing positioning member (3) is provided with through hole passing through both ends thereof, one end of the sealing positioning member (3) is sealingly connected with the other end of sealing cavity (4), the sealing positioning member (3) is provided with air hole (19), the outer side wall of the sealing positioning member (3) is fixedly connected with detection assembly, the detection assembly is communicated with one end of air hole (19), and the other end of air hole (19) is communicated with sealing cavity (4); Anti-internal leakage structure, one end of the anti-internal leakage structure is sealingly connected with the other end of the sealing positioning member (3), the other end of the anti-internal leakage structure is sealingly connected with the outer side wall of compensating cable (5), double-core armored pair of silk is threaded in threading hole, the double-core armored pair of silk passes through second process connector (15), first process connector (11), sealing cavity (4), sealing positioning member (3) and the compensating cable in the anti-internal leakage structure and is connected, and three levels of sealing are formed;The anti-internal leakage structure includes anti-internal leakage connecting barrel (10), pressing screw element (8) and threading sealing sleeve (7), the other end surface of the sealing positioning member (3) is provided with annular groove, one end of the anti-internal leakage connecting barrel (10) is fixedly connected in the annular groove, the other end inner side wall of the anti-internal leakage connecting barrel (10) is provided with stepped clamping groove, one end of the pressing screw element (8) is threadedly connected in the stepped clamping groove, and one end of the threading sealing sleeve (7) is threadedly connected with the other end of the pressing screw element (8);Multiple stainless steel pressing plates (16) are connected in the stepped clamping groove, multiple through holes are formed in the stainless steel pressing plate (16), variable-diameter armored pair of silk is threaded in the through hole, graphite sealing element (17) is arranged between adjacent two stainless steel pressing plates, and O-shaped stainless steel sealing ring (9) is arranged between one end of the pressing screw element (8) and the stainless steel pressing plate close to the side thereof.

2. A multipoint double high pressure flexible temperature sensor according to claim 1, characterized in that, One end of the sealing cavity (4) is sealingly connected with the other end of the first process connector (11) by argon arc welding, and the other end of the sealing cavity (4) is sealingly connected with one end of the sealing positioning member (3) by argon arc welding;The sealing cavity (4) is a conical sealing cavity, multiple connecting holes are formed in one end of the sealing cavity (4), the double-core armored pair of silk is variable-diameter armored pair of silk (18), sealing brazing layer is arranged between the sleeve wall of the variable-diameter armored pair of silk (18) and the inner hole wall of corresponding connecting hole, and the sleeve wall of the variable-diameter armored pair of silk (18) is sealingly welded with both ends of the threading hole.

3. The multi-point double high pressure flexible temperature sensor according to claim 1, wherein, The variable-diameter armored double wire (18) comprises a first section and a second section, the outer diameter of the first section is larger than that of the second section, the second section is connected with the compensation cable (5) through the stainless steel pressing plate (16) and the graphite seal (17), the cold end of the variable-diameter armored double wire (18) corresponds to the small-diameter end of the variable-diameter armored double wire, the compensation cable (5) is located inside the wire passing sealing sleeve (7), a sealing rubber layer is arranged between the inner wall of the wire passing sealing sleeve (7) and the outer side wall of the compensation cable (5), and the wire passing sealing sleeve (7) is connected with the wire passing fixing head (6) at the end away from the pressing screw part (8).

4. A multipoint double high pressure flexible temperature sensor according to claim 3, characterized in that, The stainless steel pressing plate (16) is provided with a limiting groove on the side close to the O-shaped stainless steel sealing ring (9), and the O-shaped stainless steel sealing ring (9) is connected in the limiting groove.

5. The multi-point duplex high pressure flexible temperature sensor of claim 1, wherein, The detection assembly comprises a valve group (2) and a leak detection instrument (1), one end of the valve group (2) is fixedly connected with the outer side wall of the sealing positioning part (3), the other end of the valve group (2) is fixedly connected with the leak detection instrument (1), and the leak detection instrument (1) is in communication with the sealing cavity (4).

6. The multi-point duplex high pressure flexible temperature sensor of claim 1, wherein, A plurality of bolt holes are formed in the outer side wall of the threaded joint (12), and positioning bolts (13) are connected in the bolt holes, and the ends of the positioning bolts (13) are abutted and fastened with the outer side wall of the second process connecting part (15).

7. A multipoint double high pressure flexible temperature sensor according to claim 6, characterized in that The ends of the first process connecting part (11) and the second process connecting part (15) close to each other are provided with lens body joint surfaces, the lens body (14) is sealingly connected between the first process connecting part (11) and the second process connecting part (15), and the first process connecting part (11) and the second process connecting part (15) are fastened by using the threaded joint (12).

8. A multipoint double high pressure flexible temperature sensor according to claim 7, characterized in that, The two ends of the lens body (14) are provided with joint curved surfaces which are sealingly attached to the lens body joint surfaces, a center hole is formed in the lens body (14), and the variable-diameter armored double wire pipe bundle is arranged in the center hole.

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