Single-point or multi-point temperature thermocouple with replaceable probe

Abstract

The utility model discloses a single-point or multi-point temperature thermocouple with a replaceable probe, which comprises a detection end and a thermocouple core wire, and is characterized in that the detection end consists of an outer protective tube, a porous inner core sleeve arranged in the outer protective tube and a plurality of temperature measuring points distributed on the outer protective tube at different distances; a plurality of thermocouple core wires are arranged in the porous inner core sleeve, the receiving end of each thermocouple core wire is connected with each temperature measuring point, a protective tube sealing assembly is arranged at the front end of the outer protective tube, and the outer protective tube can be assembled, disassembled and replaced from the protective tube sealing assembly. The number of thermocouple core wires is not limited, and more than eight thermocouple core wires can be compatible in the technical scheme. And the outer protective pipe can be detached from the protective pipe sealing assembly, so that outer protective pipes of different materials, types and models can be replaced to meet different use requirements. And the sealing performance is excellent through the cooperation of the protective pipe sealing assembly and the porous sealing assembly with the dust cover assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor field, especially a kind of probe replaceable multi-point temperature measurement thermocouple, thermistor. BACKGROUND

[0002] Thermocouple, thermistor is the core sensing element of heating system in relevant control equipment, it directly measures temperature, and temperature signal is converted into thermoelectric electromotive force signal, and the temperature of measured medium is converted into by data display instrument.The measurement precision of thermocouple is high, the temperature range that can be measured is relatively large, easy to operate, easy to operate and high measurement efficiency, but thermocouple, thermistor in prior art still has the following problems, for example:

[0003] Temperature measurement point is less, due to the volume, length, thermocouple connection mode and other technical problems of detection end, thermocouple, thermistor of prior art cannot carry out synchronous detection to the water temperature of each depth of water level, especially large depth, generally only can detect the water temperature of different depth by the number of thermocouple and detection end, the number of traditional single machine thermocouple is generally four.

[0004] The replaceability of detection end, since sometimes different materials detection end is needed for temperature measurement of different water bodies, therefore, for the consideration of enterprise cost, the replacement of whole temperature measurement equipment should be avoided, and the replacement of detection end is considered, because traditional technology detection end has the following problems: 1.short service life, 2.complex structure, 3.a problem occurs in a single wire, the whole thermocouple, thermistor is scrapped, 4.low maintainability, all are disposable products.For multi-point thermocouple, there is the problem of poor consistency of thermocouple, and the precision consistency is poor, and there is no convenient and quick solution in prior art.

[0005] Traditional temperature measurement thermocouple, thermistor adopts simple scheme in sealing performance, and water enters the electronic part, so it is necessary to improve the sealing performance. UTILITY MODEL CONTENTS

[0006] In view of the defects of the above prior art, the technical problem to be solved by the utility model is to provide a thermocouple, thermistor, which can carry out multi-point temperature measurement on detection end, and can quickly replace detection end according to material, model and type requirements, and the sealing performance is improved.

[0007] In order to achieve the above purpose, the utility model provides the following scheme:

[0008] A replaceable probe single-point or multi-point temperature measuring thermocouple includes a probe end and thermocouple core wires. The probe end consists of an outer sheath, a porous inner core sleeve disposed within the outer sheath, and multiple temperature measuring points distributed at different distances on the outer sheath. The thermocouple core wires have multiple receivers disposed within the porous inner core sleeves and connected to each temperature measuring point. A sheath sealing assembly is provided at the front end of the outer sheath, and the outer sheath can be installed, removed, and replaced from it. A porous sealing assembly for limiting and fixing each thermocouple core wire is provided at the front end of the sheath sealing assembly. A dust cover assembly for sealing and dust prevention is also provided at the front end of the sheath sealing assembly. The output end of the thermocouple core wire extends from the front end of the dust cover assembly. A self-locking pressure device is provided on the outside of the sheath sealing assembly.

[0009] Furthermore, the porous inner core sleeve of this utility model is in the shape of a lotus flower formed by multiple protrusions, and each protrusion is provided with several core holes for the insertion of thermocouple core wires. Multiple side holes corresponding to the temperature measuring points are provided on the outside of the porous inner core sleeve, and the receiving end of the thermocouple core wires in the side holes extends out and connects to the temperature measuring points.

[0010] Furthermore, the protective tube sealing assembly of this utility model includes a sealing block fixedly connected to the front end of the outer protective tube, a plurality of sealing rings installed on the sealing block, a locking sleeve movably fitted on the outer protective tube, and a connecting sleeve provided outside the sealing block, the rear end of the connecting sleeve being connected to the locking sleeve by a thread.

[0011] Furthermore, the multi-hole sealing assembly of this utility model includes a glancing seal joint, which is threaded into the inner wall of the front side of the connecting sleeve. Multiple mounting holes are provided in the glancing seal joint, and multiple thermocouple core wires are inserted into the mounting holes to achieve limiting and fixing.

[0012] Furthermore, the self-locking pressure device of this utility model includes an automatic exhaust valve and a pressure gauge installed on the connecting sleeve. The automatic exhaust valve is a model with a self-locking function, and the pressure gauge is a model with vacuum pressure and inert gas pressure detection.

[0013] Furthermore, the dust cover assembly of this utility model includes a cover body, the rear side of the inner wall of the cover body is threaded to the front side of the connecting sleeve, a cable sealing joint is provided at the front end of the cover body, a through hole is provided in the middle of the cable sealing joint, and the output end of the thermocouple core wire extends out from the middle of the cable sealing joint.

[0014] Furthermore, the dust cover assembly of this utility model is equipped with a data display.

[0015] Furthermore, in this invention, a plug is installed at the output end of each thermocouple core wire.

[0016] In summary, the advantages of this utility model over the prior art are:

[0017] This invention, through the setting of an outer protective tube and a porous inner core sleeve, allows for the installation of multiple thermocouple cores, enabling multi-point temperature measurement. The number of thermocouple cores is unlimited, and this technical solution can accommodate more than eight. Furthermore, the outer protective tube can be removed from the protective tube sealing assembly, allowing for replacement with outer protective tubes of different materials, types, and models to meet diverse usage needs. This avoids the entire thermocouple / resistance device being scrapped due to a single component failure, preventing the lifespan of some materials and components from being pushed to its limit. Therefore, the utilization rate and service life of the new thermocouple / resistance device are 1.2-2.0 times higher than existing products. In terms of sealing, the protective tube sealing assembly and the porous sealing assembly, combined with the dust cover assembly, ensure excellent sealing performance. Internally, conventional sealing methods include vacuum, inert gas filling to protect the thermocouple wires, silicone oil filling, and high-temperature liquid filling for insulation. Therefore, a self-locking pressure device is added (to prevent high-temperature tube bursting), giving it explosion-proof functionality. It also features digital pressure display, wireless temperature transmission, and data storage functions. A new modular design is adopted for thermocouples and resistance thermometers. Both the cold end (welding-free and glue-sealed) and the hot end adopt a new sealing method, which enables rapid production, shortens the production cycle, and improves the delivery time of finished products. Attached Figure Description

[0018] Figure 1 This is a planar exploded view of the present invention;

[0019] Figure 2 This is a planar sectional view of the segmented outer protective tube of this utility model;

[0020] Figure 3 This is a planar exploded view of the present invention;

[0021] Figure 4 This is a schematic diagram of several alternative designs for the porous inner core sleeve of this utility model;

[0022] Figure 5 This is a three-dimensional schematic diagram of the porous inner core sleeve of this utility model;

[0023] Figure 6 This is a cross-sectional schematic diagram of the porous sealing assembly of this utility model;

[0024] Figure 7 This is a schematic diagram of the end face of the dust cover assembly of this utility model. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0026] like Figures 1 to 7The present invention preferably provides a probe-replaceable multi-point temperature measuring thermocouple, including a probe end and a thermocouple core wire 1. The probe end consists of an outer protective tube 2, a porous inner core sleeve 3 disposed within the outer protective tube 2, and multiple temperature measuring points 4 distributed at different distances on the outer protective tube 2. The thermocouple core wire 1 has multiple parts disposed within the porous inner core sleeve 3 and its receiving end is connected to each temperature measuring point 4. A protective tube sealing assembly 6 is provided at the front end of the outer protective tube 2, and the outer protective tube 2 can be installed, removed, and replaced from it. A porous sealing assembly 7 for limiting and fixing each thermocouple core wire 1 is provided at the front end of the protective tube sealing assembly 6. A dust cover assembly 5 for sealing and dust prevention is also provided at the front end of the protective tube sealing assembly 6. The output end of the thermocouple core wire 1 extends from the front end of the dust cover assembly 5. A self-locking pressure device 8 is provided on the outside of the protective tube sealing assembly 6.

[0027] In this technical solution, the probe end refers to the component used for temperature detection when inserted into the liquid. Existing technologies often use probes, while this solution employs an outer sheath. An internal porous core sleeve separates and guides multiple thermocouple cores to various temperature measurement points on the outer sheath. Because it is a wire, the porous core sleeve prevents the thermocouple cores from tangling and causing unnecessary data errors. Temperature measurement points are set at different distances on the outer sheath, with each thermocouple core's receiving end connected to a measurement point, thus enabling multi-point temperature measurement. The outer sheath can be removed and replaced from the sheath sealing assembly. The sheath sealing assembly seals the inside of the outer sheath to prevent water ingress. The porous sealing assembly limits and fixes the front section of the thermocouple cores, preventing tangling. The dust cover assembly smooths the overall surface to prevent dust ingress and also provides a seal, forming the first layer of seal for the entire thermocouple. The sheath sealing assembly, porous sealing assembly, and dust cover assembly work together to complete the entire seal. A self-locking pressure device is used to detect other pressures.

[0028] The porous inner core sleeve 3 of this invention is lotus-shaped with multiple protrusions 31, and each protrusion 31 has several core holes 32 for inserting thermocouple core wires 1. Multiple side holes 33 corresponding to temperature measuring points 4 are provided on the outside of the porous inner core sleeve 3, connecting to the core holes 32. The receiving end of the thermocouple core wire 1 extends out through the side holes and connects to the temperature measuring point 4. The receiving end of the thermocouple core wire is first inserted through the core hole, then extends out through the side hole, and connects to the temperature measuring point of the outer protective tube. In this technical solution, the porous inner core sleeve has 8 protrusions, 8 core holes, and 8 side holes. The actual number can be increased according to actual needs. Furthermore, different numbers of protrusions, core holes, and side holes can be preset to represent different models of porous inner core sleeves for replacement purposes.

[0029] The protective tube sealing assembly 6 of this utility model includes a sealing block 61 fixedly connected to the front end of the outer protective tube 2. A plurality of sealing rings 62 are installed on the sealing block 61. A locking sleeve 63 is movably fitted onto the outer protective tube 2. A connecting sleeve 64 is provided outside the sealing block 61, and the rear end of the connecting sleeve 64 is threadedly connected to the locking sleeve 63. The sealing block is used to install the sealing rings. After the locking sleeve is threadedly connected to the connecting sleeve, the sealing ring seals between the sealing block and the inner wall of the connecting sleeve. The locking sleeve can be inserted from the rear end of the outer protective tube until it reaches the sealing block. Disassembly and replacement of the outer protective tube requires unscrewing the locking sleeve from the connecting sleeve, removing the locking sleeve from the rear end of the outer protective tube, replacing the outer protective tube, and then reconnecting the locking sleeve and connecting sleeve. In this technical solution, the outer protective tube can be replaced with different materials, with different models of outer protective tubes pre-set for replacement. Specific materials may include: stainless steel, quartz, corundum, and silicon carbide.

[0030] The multi-hole sealing assembly 7 of this utility model includes a gland seal joint 71, which is threaded into the inner wall of the front side of the connecting sleeve 64. Multiple mounting holes 72 are provided within the gland seal joint 71, and multiple thermocouple core wires 1 are inserted into the mounting holes 72 for positioning and fixation. The gland seal joint is a prior art structure, connected and fixed to the connecting sleeve. It has mounting holes inside for inserting thermocouple core wires, thereby limiting and fixing the front section of the thermocouple core wires and preventing tangling. The number of mounting holes is not limited, but more holes should be reserved. In this technical solution, there are 8 thermocouple core wires, and 16 mounting holes are reserved for use when adding more thermocouple core wires.

[0031] The self-locking pressure device 8 described in this utility model includes an automatic exhaust valve 81 and a pressure gauge 82 mounted on a connecting sleeve 64. The automatic exhaust valve 81 is a model with a self-locking function, and the pressure gauge 82 is a model capable of detecting vacuum pressure and inert gas pressure. The automatic exhaust valve is used to release air when the pressure gauge detects that the vacuum pressure or inert gas pressure exceeds a threshold. The use of a model with a self-locking function facilitates user operation.

[0032] The dust cover assembly 5 of this utility model includes a cover body 51. The rear side of the inner wall of the cover body 51 is threaded onto the front side of the connecting sleeve 64. A cable sealing joint 52 is provided at the front end of the cover body 51. A through hole 53 is provided in the middle of the cable sealing joint 52. The output end of the thermocouple core wire 1 extends out from the middle of the cable sealing joint 52. The rear end of the cover body is sealed by connecting it to the connecting sleeve through threads, and the front end is sealed by the cable sealing joint. The cable sealing joint has only one through hole, and the thermocouple core wire can be sealed by putting on a sealing ring or a rubber sleeve.

[0033] The dust cover assembly 5 of this invention is equipped with a data display 9. This display is used to show data, connect to the thermocouple core wire, and record information for easy feedback. Depending on actual needs, other functional components can be added to or replaced on the dust cover assembly, such as: an alarm light self-diagnostic component, a wireless transmission technology component, or a component with a transmitter.

[0034] In this invention, a plug 91 is installed at the output end of each thermocouple core wire 1. Installing plugs on thermocouple core wires to connect external devices is a common existing technology. The types of thermocouples that can be used or replaced in this technical solution include S, N, K, B, C, and RS types, and combined thermocouples, such as B+C+RS thermocouples, can also be used.

[0035] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A probe replaceable single point or multipoint temperature measuring thermocouple comprising a probe end and a thermocouple wire (1), characterized in that: The probe end is composed of an outer protective tube (2), a porous inner core sleeve (3) arranged in the outer protective tube (2), and a plurality of temperature measuring points (4) distributed at different distances on the outer protective tube (2). The thermocouple core wire (1) has a plurality of receiving ends connected with the temperature measuring points (4) and arranged in the porous inner core sleeve (3). A protective tube sealing assembly (6) is arranged at the front end of the outer protective tube (2), and the outer protective tube (2) can be assembled, disassembled and replaced therefrom. A porous sealing assembly (7) for limiting and fixing the thermocouple core wire (1) is arranged at the front end of the protective tube sealing assembly (6). A dust cover assembly (5) for sealing and dust prevention is further arranged at the front end of the protective tube sealing assembly (6). The output end of the thermocouple core wire (1) extends from the front end of the dust cover assembly (5). A self-locking pressure device (8) is arranged outside the protective tube sealing assembly (6).

2. A probe replaceable single or multi-point temperature measuring thermocouple according to claim 1, characterized in that: The porous inner core sleeve (3) is lotus-shaped with a plurality of convex parts (31). A plurality of core holes (32) are arranged on each convex part (31) for inserting the thermocouple core wire (1). A plurality of side holes (33) corresponding to the temperature measuring points (4) are arranged outside the porous inner core sleeve (3) to communicate with the core holes (32). The side holes (33) are used for the receiving end of the thermocouple core wire (1) to extend and connect with the temperature measuring points (4).

3. A probe replaceable single or multi-point temperature measuring thermocouple according to claim 1 or 2, characterized in that: The protective tube sealing assembly (6) comprises a sealing block (61) fixedly connected to the front end of the outer protective tube (2). A plurality of sealing rings (62) are mounted on the sealing block (61). A locking sleeve (63) is movably arranged on the outer protective tube (2). A connecting sleeve (64) is arranged outside the sealing block (61). The rear end of the connecting sleeve (64) is connected with the locking sleeve (63) through threads.

4. A probe replaceable single or multi-point temperature measuring thermocouple according to claim 3, characterized in that: The porous sealing assembly (7) comprises a gland sealing joint (71). The gland sealing joint (71) is inserted into the front inner wall of the connecting sleeve (64) through threads. A plurality of mounting holes (72) are arranged in the gland sealing joint (71). A plurality of the thermocouple core wires (1) are inserted into the mounting holes (72) to realize limiting and fixing.

5. A probe replaceable single or multi-point temperature measuring thermocouple according to claim 3, characterized in that: The self-locking pressure device (8) comprises an automatic exhaust valve (81) and a pressure gauge (82) arranged on the connecting sleeve (64). The automatic exhaust valve (81) is of a type with a self-locking function. The pressure gauge (82) is of a type with vacuum pressure and inert gas pressure detection.

6. A probe replaceable single or multi-point temperature measuring thermocouple according to claim 3, characterized in that: The dust cover assembly (5) comprises a cover body (51). The inner wall rear side of the cover body (51) is mounted on the front side of the connecting sleeve (64) through threads. A cable sealing joint (52) is arranged at the front end of the cover body (51). A through hole (53) is arranged in the middle of the cable sealing joint (52). The output end of the thermocouple core wire (1) extends from the middle of the cable sealing joint (52).

7. A probe replaceable single or multi-point temperature measuring thermocouple according to claim 1, characterized in that: A data display (9) is arranged on the dust cover assembly (5).

8. A probe replaceable single or multi-point temperature measuring thermocouple according to claim 1, characterized in that: A plug (91) is arranged at the output end of each thermocouple core wire (1).

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