CN217741934U - Electric heater for heating oil liquid of hydraulic system - Google Patents
Electric heater for heating oil liquid of hydraulic system Download PDFInfo
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- CN217741934U CN217741934U CN202221459950.7U CN202221459950U CN217741934U CN 217741934 U CN217741934 U CN 217741934U CN 202221459950 U CN202221459950 U CN 202221459950U CN 217741934 U CN217741934 U CN 217741934U
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Abstract
The utility model provides an electric heater for heating hydraulic system oil, which comprises a metal protective sleeve, a heating wire, a temperature sensor and a temperature controller, wherein the temperature sensor is fixedly arranged on the inner wall surface of the lower part of the metal protective sleeve, and the lead of the temperature sensor is electrically connected with the input end of the temperature controller; the temperature controller is located outside the metal protective sleeve, and the output end of the temperature controller is connected with the relay and controls the on-off of the relay. The utility model controls the surface temperature of the electric heating pipe through the temperature control instrument, can effectively prevent oil from being oxidized and deteriorated and prevent asphalt substances from being separated out through temperature control, prolongs the service life of the oil, improves the safety of a hydraulic system, does not smoke when in heating, and has good environmental protection benefit; in addition, the built-in form of the sensor is convenient for the installation and replacement of the heating pipe.
Description
Technical Field
The utility model relates to a hydraulic system especially relates to the electrical heating technique of fluid among the hydraulic system, specifically is an electric heater for hydraulic system fluid heating.
Background
At present, the electric heating of oil in a hydraulic system is generally to electrify an electric heating pipe and heat the oil by utilizing the high temperature of the surface of the electric heating pipe. In order to control the heating temperature of the oil, a temperature sensor connected with a temperature controller is placed in the heated oil, and when the temperature of the oil reaches a set temperature, the electric heating tube is powered off, and heating is stopped.
The heating principle looks like no problem, but actually, when the electric heating tube is electrified, the surface temperature of the electric heating tube can reach 500 ℃ to 1000 ℃, oil liquid contacting with the surface of the electric heating tube is oxidized and deteriorated quickly under the action of high temperature to separate out asphalt substances, and the asphalt substances are adhered to the surface of the electric heating tube, so that the heat conductivity of the oil liquid is reduced, the heat of the electric heating tube cannot be diffused in time, and the surface temperature of the electric heating tube is further improved; in such a vicious circle, more oil liquid is oxidized and deteriorated, more asphalt substances are separated out, some asphalt substances can block the small damping holes and the slit valve ports, the pressure valves are locked and cannot act, the oil liquid metal pipelines are stretched, bent and even broken, the heating power and the heating effect of the electric heating system are influenced, and meanwhile, the safety and the service life of the hydraulic system are also influenced.
In addition, asphalt substances adhered to the surface of the electric heating tube are easily burnt to the smoking degree due to overhigh temperature of the surface of the heating tube in the heating process, smoke is diffused into the air, the physical health of operators is affected, and meanwhile, the environmental protection of a hydraulic system cannot reach the standard.
Disclosure of Invention
In view of the problems in the prior art, the present invention is directed to an electric heater for heating oil in a hydraulic system, which is configured to connect a temperature sensor to an inner wall of an electric heating tube, connect the temperature sensor to a temperature controller, and control the operation of the electric heating tube by measuring the temperature of the inner wall surface of the electric heating tube; because during the heating, electric heating pipe inner wall surface temperature equals its external surface temperature (be the fluid temperature) basically, therefore the temperature controller has both controlled the fluid temperature and has controlled electric heating pipe surface temperature, and accessible control by temperature change prevents effectively that fluid oxidation is rotten and the precipitation of pitch material, extension fluid life to improve hydraulic system security, in addition, the utility model discloses fluid is not smoked during the heating, has good environmental protection benefit.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an electric heater for heating oil in a hydraulic system comprises a metal protective sleeve, an electric heating wire, a temperature sensor and a temperature controller, wherein the metal protective sleeve is integrally of a tubular structure, two ends of the metal protective sleeve are sealed by adopting insulating materials, a binding post penetrates through the sealing surface of the upper end of the metal protective sleeve, the electric heating wire is positioned in the metal protective sleeve and is not in contact with the metal protective sleeve, the electric heating wire is connected with a relay positioned outside the metal protective sleeve through the binding post, and the relay is connected with an external power supply; the inner part of the metal sheath pipe is provided with an insulating and heat-conducting filler for supporting and fixing the electric heating wire;
the temperature sensor is fixedly arranged on the surface of the inner wall of the lower part of the metal protective sleeve, and a lead of the temperature sensor is electrically connected with the input end of the temperature controller; the temperature controller is positioned outside the metal protective sleeve, and the output end of the temperature controller is connected with the relay and controls the on-off of the relay.
The temperature sensor is a surface thermal resistance sensor and comprises a lead and a sensor body, the working surface of the sensor body is adhered to the inner wall surface of the metal protective sleeve, a rigid shell A covers the outer part of the sensor body, the rigid shell A is fixedly connected to the inner wall surface of the metal protective sleeve, and a heat insulation material layer is coated on the outer part of the rigid shell A; the lower end of the lead penetrates through the rigid shell A to be connected with the sensor body, and the upper end of the lead penetrates through the closed surface of the metal protective sleeve to be connected with the temperature controller.
The upper part of the rigid shell A is provided with a rigid shell B, the rigid shell B is also fixedly connected to the inner wall surface of the metal protective sleeve and communicated with the rigid shell A, the upper end of the rigid shell B is provided with an opening, and the lead wire enters the rigid shell A from the opening at the upper end of the rigid shell B; the outer part of the rigid shell B is also covered with a thermal insulation material layer, and the upper end opening of the rigid shell B and the lead are sealed by adopting a thermal insulation material.
The outer part of the lead is coated with a high-temperature-resistant insulating sheath, and the high-temperature-resistant insulating sheath positioned in the rigid shell B is adhered to the inner wall of the metal sheath pipe.
The length of the high-temperature-resistant insulating sheath pasted on the inner wall of the metal sheath pipe is not less than 15 cm.
The temperature controller is internally provided with an AD conversion module for converting the analog signal of the temperature sensor into a digital signal.
The utility model has the advantages that: the utility model controls the surface temperature of the electric heating pipe through the temperature control instrument, can effectively prevent oil from being oxidized and deteriorated and prevent asphalt substances from being separated out through temperature control, prolongs the service life of the oil, improves the safety of a hydraulic system, does not smoke the oil during heating, and has good environmental protection benefit; in addition, the built-in form of the sensor is convenient for the installation and replacement of the heating pipe.
Drawings
Fig. 1 is a front view of the overall structure of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a left side sectional view of the present invention.
Fig. 4 is a left side view of rigid housing a and rigid housing B.
In fig. 3, the terminals and heating wires are removed for ease of illustration.
In the figure: 1. the sensor comprises a metal protective sleeve, 2 parts of a heating wire, 3 parts of a temperature sensor, 4 parts of a temperature controller, 5 parts of a binding post, 6 parts of a relay, 8 parts of a filler, 31 parts of a lead, 32 parts of a sensor body, 33 parts of rigid shells A and 34 parts of a heat insulation material layer, 35 parts of a rigid shell B.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-4, an electric heater for heating oil in a hydraulic system includes a metal protective sleeve 1, a heating wire 2, a temperature sensor 3 and a temperature controller 4, wherein the metal protective sleeve 1 is of a tubular structure, two ends of the metal protective sleeve 1 are sealed by an insulating material, a terminal 5 is arranged in a sealing surface of the upper end of the metal protective sleeve, the heating wire 2 is located inside the metal protective sleeve 1 and is not in contact with the metal protective sleeve 1, the heating wire 2 is connected to a relay 6 located outside the metal protective sleeve 1 through the terminal 5, and the relay 6 is connected to an external power supply; the metal protecting sleeve 1 is internally provided with an insulating and heat-conducting filler 8 for supporting and fixing the electric heating wire 2; the temperature sensor 3 is fixedly arranged on the surface of the inner wall of the lower part of the metal protective sleeve 1, and a lead 31 of the temperature sensor 3 is electrically connected with the input end of the temperature controller 4; the temperature controller 4 is positioned outside the metal protecting sleeve 1, and the output end of the temperature controller 4 is connected with the relay 6 and controls the on-off of the relay.
The temperature sensor 3 is a surface thermal resistance sensor, and the working surface of the surface thermal resistance sensor is in fit with the surface shape of the object to be measured, so that, in the utility model, the whole profile of the temperature sensor 3 is arc-shaped, and comprises a lead 31 and a sensor body 32, the working surface of the sensor body 32 is adhered to the inner wall surface of the metal protecting sleeve 1, the outer part of the sensor body 32 is covered with a rigid shell A33, the rigid shell A33 is adhered to the inner wall surface of the metal protecting sleeve 1, and the outer part of the rigid shell A33 is covered with a heat insulation material layer 34; the lower end of the lead 31 penetrates into the rigid shell A33 and is connected with the sensor body 32, and the upper end of the lead penetrates through the closed surface of the metal protective sleeve 1 and is connected with the temperature controller 4. The above structure ensures the isolation of the sensor body 32 from the external environment, and therefore, the temperature acquired by the sensor body 32 is equal to the temperature of the inner wall surface of the metal sheath tube 1.
The upper part of the rigid shell A33 is provided with a rigid shell B35, the rigid shell B35 is also adhered to the inner wall surface of the metal protective sleeve 1 and communicated with the rigid shell A33, the upper end of the rigid shell B35 is provided with an opening, and the lead 31 enters the rigid shell A33 from the opening at the upper end of the rigid shell B35; the rigid casing B35 is also covered with a layer 34 of heat insulating material on the outside, and the upper end opening of the rigid casing B35 and the lead wire 31 are sealed with a heat insulating material. The rigid casing B35 mainly functions to isolate the portion of the lead 31 connected to the sensor body 32 from the external environment, and to reduce the influence of the thermal conduction effect of the lead on the sensor body.
The outside cladding of lead wire 31 have high temperature resistant insulating sheath, be located the high temperature resistant insulating sheath of rigid housing B35 paste on the inner wall of metal protecting pipe 1. The main function of the design is to make the temperature of the lead 31 close to the temperature of the inner wall of the metal sheath tube 1, and also to reduce the influence of the heat conduction effect of the lead on the sensor body.
The length of the high-temperature resistant insulating sheath pasted on the inner wall of the metal sheath pipe 1 is not less than 15 cm. When the length value of the lead wire stuck on the inner wall of the metal sheath pipe 1 is larger than 15 cm, the temperature of the lead wire is basically close to the temperature of the inner wall of the metal sheath pipe 1, and the heat conduction effect of the lead wire on the sensor body 32 can be ignored.
The temperature controller 4 is internally provided with an AD conversion module for converting the analog signal of the temperature sensor 3 into a digital signal. The temperature controller is a well-known intelligent control device, and is not described in detail herein.
The utility model discloses mainly be applicable to hydraulic system, under the general condition, hydraulic system's fluid temperature only need control in certain within range can, for example 80 ℃ to 90 ℃ within range, the utility model discloses when using, only need with the temperature threshold value setting of temperature controller can at 90 ℃, because the heat conduction of fluid is good, temperature gradient is usually within 10 ℃, can satisfy general hydraulic oil heating demand.
If the oil is required to accurately control the temperature, for example, 85 +/-1 ℃, a set of temperature sensor and temperature controller can be additionally arranged in the oil, the temperature controller of the oil is set to be 85 ℃, and meanwhile, the temperature controller of the electric heating tube is set to be 100 ℃.
If the heating speed is required, the number of the heaters can be increased in the heating box.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
The part of the utility model not detailed is prior art.
Claims (6)
1. The utility model provides an electric heater for hydraulic system fluid heating, includes metal protecting pipe (1), heating wire (2), temperature sensor (3) and temperature controller (4), characterized by: the metal protective sleeve (1) is integrally of a tubular structure, two ends of the metal protective sleeve are sealed by insulating materials, a binding post (5) penetrates through the sealing surface at the upper end of the metal protective sleeve, the electric heating wire (2) is located inside the metal protective sleeve (1) and is not in contact with the metal protective sleeve (1), the electric heating wire (2) is connected with a relay (6) located outside the metal protective sleeve (1) through the binding post (5), and the relay (6) is connected with an external power supply; the metal protective sleeve (1) is internally provided with an insulating and heat-conducting filler (8) for supporting and fixing the electric heating wire (2);
the temperature sensor (3) is fixedly arranged on the surface of the inner wall of the lower part of the metal protective sleeve (1), and a lead (31) of the temperature sensor (3) is electrically connected with the input end of the temperature controller (4); the temperature controller (4) is located outside the metal protective sleeve (1), and the output end of the temperature controller (4) is connected with the relay (6) and controls the on-off of the relay.
2. An electric heater for heating oil in a hydraulic system according to claim 1, wherein: the temperature sensor (3) is a surface thermal resistance sensor and comprises a lead (31) and a sensor body (32), the working surface of the sensor body (32) is adhered to the inner wall surface of the metal protecting sleeve (1), a rigid shell A (33) covers the outside of the sensor body (32), the rigid shell A (33) is fixedly connected to the inner wall surface of the metal protecting sleeve (1), and a heat insulation material layer (34) is coated outside the rigid shell A (33); the lower end of the lead (31) penetrates into the rigid shell A (33) to be connected with the sensor body (32), and the upper end of the lead penetrates through the closed surface of the metal protecting sleeve (1) to be connected with the temperature controller (4).
3. An electric heater for heating oil in a hydraulic system according to claim 2, wherein: the upper part of the rigid shell A (33) is provided with a rigid shell B (35), the rigid shell B (35) is also fixedly connected to the inner wall surface of the metal protective sleeve (1) and communicated with the rigid shell A (33), the upper end of the rigid shell B (35) is provided with an opening, and the lead (31) enters the rigid shell A (33) from the opening at the upper end of the rigid shell B (35); the rigid shell B (35) is also covered with a heat insulation material layer (34), and the upper end opening of the rigid shell B (35) and the lead (31) are sealed by a heat insulation material.
4. An electric heater for heating oil in a hydraulic system according to claim 3, wherein: the outer part of the lead (31) is coated with a high-temperature-resistant insulating sheath, and the high-temperature-resistant insulating sheath positioned in the rigid shell B (35) is adhered to the inner wall of the metal sheath pipe (1).
5. An electric heater for heating oil in a hydraulic system as claimed in claim 4, wherein: the length of the high-temperature resistant insulating sheath pasted on the inner wall of the metal sheath tube (1) is not less than 15 cm.
6. An electric heater for heating oil in a hydraulic system according to claim 1, wherein: an AD conversion module is arranged in the temperature controller (4) and used for converting analog signals of the temperature sensor (3) into digital signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221459950.7U CN217741934U (en) | 2022-06-13 | 2022-06-13 | Electric heater for heating oil liquid of hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221459950.7U CN217741934U (en) | 2022-06-13 | 2022-06-13 | Electric heater for heating oil liquid of hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217741934U true CN217741934U (en) | 2022-11-04 |
Family
ID=83841298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221459950.7U Active CN217741934U (en) | 2022-06-13 | 2022-06-13 | Electric heater for heating oil liquid of hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217741934U (en) |
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2022
- 2022-06-13 CN CN202221459950.7U patent/CN217741934U/en active Active
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