Protective device of melt filter

Abstract

The utility model discloses a protective device of a melt filter, which structurally comprises a filter jacket, a heat-conducting oil collecting box connected with the filter jacket through an exhaust pipe, an air bag telescopic box internally provided with an air bag, and an air outlet connected with the air bag telescopic box through an air outlet pipe, and the other end of the heat-conducting oil collecting box is connected with the filter jacket through a return pipe. And the other end of the air bag telescopic box is connected with the heat-conducting oil collecting box. After the technical scheme is adopted, according to the protection device of the melt filter, the air bag is used for collecting air exhausted due to expansion of the volume of heat conduction oil and the volume of air in a cavity in the filter jacket in the heating process, the volume is compensated, meanwhile, external air is prevented from entering the filter jacket, and the service life of the heat conduction oil is prolonged; the heat-conducting oil collecting box is used for collecting heat-conducting oil which is partially vaporized due to heating and escaped to the exhaust pipe due to thermal expansion; the return pipe valve is arranged, so that cold oil cannot return to the filter jacket to be in contact with hot oil, and the splashing phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to a protective device for a melt filter. Background Art

[0002] The existing melt filter heats the internal filter by electrically heating the jacket heat transfer oil through the heat conduction of the high-temperature heat transfer oil. During the jacket heat transfer oil heating process, the heat transfer oil in the jacket cavity will expand, and some oil gas will enter the exhaust pipe and the heat transfer oil collection box. After being cooled to liquid, the cold oil will flow back into the jacket and encounter the high-temperature oil, which will cause splashing. The high-temperature grease splashing from the notch of the heat transfer oil collection box will have a great impact on the operator's work safety, working environment and equipment maintenance. Utility Model Content

[0003] In view of the above problems, the utility model provides a protective device for a melt filter.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a protective device for a melt filter, whose structure includes a filter jacket, a heat transfer oil collection box connected to the filter jacket through an exhaust pipe, the other end of the heat transfer oil collection box is connected to the filter jacket through a return pipe, and also includes an airbag telescopic box arranged above the heat transfer oil collection box, the airbag telescopic box has an airbag built in, and the other end of the airbag telescopic box is connected to the heat transfer oil collection box.

[0005] Preferably, a threaded pipe is provided on the top of the heat transfer oil collection box, and the interface end of the airbag is threadably connected to the threaded pipe.

[0006] Preferably, a pressure relief valve is provided on the thermal oil collection tank.

[0007] Preferably, a flange and a return pipe valve are provided on the return pipe, and the return pipe valve is located on a side close to the heat transfer oil collection tank.

[0008] Preferably, thermal insulation cotton is provided on the outer side of the exhaust pipe.

[0009] Preferably, the exhaust pipe includes a first longitudinal tube connected to the thermal oil collection box and a second longitudinal tube connected to the filter jacket, the first longitudinal tube and the second longitudinal tube are connected by a connecting tube, and the thermal insulation cotton is wrapped on the outer side of the tube body of the second longitudinal tube and the connecting tube.

[0010] Preferably, the connecting pipe is obliquely connected between the first longitudinal pipe and the second longitudinal pipe, and the height of the first longitudinal pipe is lower than that of the second longitudinal pipe.

[0011] Preferably, a detachable mesh cover is provided on the top of the airbag telescopic box.

[0012] Preferably, a guide plate is provided on the inner bottom wall of the heat transfer oil collection box.

[0013] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages:

[0014] The utility model manufactures a closed container divided into upper and lower parts, the upper part is an airbag telescopic box, and an airbag is installed inside the airbag telescopic box, which is used to collect the gas discharged due to the expansion of the volume of the heat transfer oil and the volume of the cavity gas in the filter jacket during the heating process, so as to achieve volume compensation while isolating the external air from entering the filter jacket, thereby extending the service life of the heat transfer oil; the lower part is a heat transfer oil collection box, which is used to collect the heat transfer oil that is partially vaporized due to heating and escapes to the exhaust pipe due to thermal expansion; a return pipe valve is arranged at the return pipe flange, and the return pipe valve is closed during the heating process, so that the cold oil will not return to the filter jacket and contact with the hot oil, thereby avoiding splashing; when the production is completed and the filter temperature drops to normal temperature, the return pipe valve is opened to return the heat transfer oil in the heat transfer oil collection box to the cavity of the filter jacket, so as to achieve recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a protective device for a melt filter of the utility model;

[0017] Figure 2 The utility model is a left view of a protective device for a melt filter. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0019] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] Example

[0023] like Figure 1 and Figure 2 As shown, a protective device for a melt filter comprises a filter jacket 1, a heat transfer oil collecting box 2 connected to the filter jacket 1 through an exhaust pipe 3, the other end of the heat transfer oil collecting box 2 is connected to the filter jacket 1 through a return pipe 4, and also comprises an airbag telescopic box 5 arranged above the heat transfer oil collecting box 2, the airbag telescopic box 5 has an airbag 51 built therein, and the other end of the airbag telescopic box 5 is connected to the heat transfer oil collecting box 2; a feed pipe 11 is arranged on one side of the filter jacket 1; wherein the airbag 51 is a rubber airbag 51, and the volume of the airbag 51 is 35L; the filter jacket 1 can accommodate 60L of heat transfer oil (T66), and its volume will expand by about 8L according to the thermal expansion coefficient of the heat transfer oil at the process design temperature, and the volume of the cavity gas in the filter jacket is 12L. According to Charles' law, when the air rises from 40°C to 260°C, the volume of the gas after expansion is 20.4L, and the volume of the airbag 51 can meet the conditions for collecting the expanded gas volume.

[0024] like Figure 2 As shown, a threaded tube 21 is provided on the top of the heat transfer oil collection box 2, and the interface end of the airbag 51 is threadedly connected to the threaded tube 21; and the threaded tube is communicated with the inner cavity of the heat transfer oil collection box. With this structure, the airbag 51 and the threaded tube 21 are threadedly connected, which facilitates the replacement or maintenance of the airbag 51.

[0025] like Figure 1 and Figure 2 As shown, a pressure relief valve 22 is provided on the heat transfer oil collection box 2; wherein, the pressure relief valve 22 is a DN25 ball valve. With this structure, the pressure relief valve 22 is provided on the side of the heat transfer oil collection box 2, and the pressure relief valve 22 is opened to relieve pressure when an emergency pressure relief situation occurs.

[0026] like Figure 1 and Figure 2 As shown, a flange 42 and a return pipe valve 41 are provided on the return pipe 4 , and the return pipe valve 41 is located on a side close to the thermal oil collecting tank 2 .

[0027] like Figure 2 As shown, the outer side of the exhaust pipe 3 is provided with heat insulation cotton 3a; the exhaust pipe 3 includes a first longitudinal pipe 31 connected to the heat transfer oil collection box 2, and a second longitudinal pipe 32 connected to the filter jacket 1. The first longitudinal pipe 31 and the second longitudinal pipe 32 are connected through a connecting pipe 33, and the heat insulation cotton 3a is coated on the outer side of the second longitudinal pipe 32 and the connecting pipe 33. With this structure, the provision of the heat insulation cotton 3a is conducive to heat preservation of the heat transfer oil.

[0028] like Figure 1 and Figure 2 As shown, the connecting pipe 33 is connected obliquely between the first longitudinal pipe 31 and the second longitudinal pipe 32, and the height of the first longitudinal pipe 31 is lower than the height of the second longitudinal pipe 32. With this structure, the inclined setting of the connecting pipe 33 is conducive to the transportation of the heat transfer oil.

[0029] like Figure 1 As shown, a detachable mesh cover 6 is provided on the top of the airbag telescopic box 5. With this structure, a detachable mesh cover is provided on the top of the airbag telescopic box 5, which is conducive to replacing the airbag 51.

[0030] like Figure 2 As shown, a guide plate 2a is provided on the inner bottom wall of the thermal oil collecting box 2.

[0031] When used specifically:

[0032] An airbag 51 is installed inside the airbag telescopic box 5, which is used to collect the gas discharged due to the expansion of the volume of the heat transfer oil and the volume of the cavity gas in the filter jacket 1 during the heating process, thereby compensating the volume and isolating the external air from entering the filter jacket 1, thereby extending the service life of the heat transfer oil;

[0033] The heat transfer oil collection tank 2 is used to collect the heat transfer oil that is partially vaporized due to heating and escapes to the exhaust pipe 3 due to thermal expansion;

[0034] The return pipe valve 41 at the return pipe 4 flange is closed during the heating process to prevent the cold oil from returning to the filter jacket 1 and contacting the hot oil, thereby avoiding splashing.

[0035] After the production is finished, the filter cools down naturally, and the gas collected by the airbag 51 returns to the thermal oil jacket; when the temperature drops to a safe temperature, the return pipe valve 41 is opened to return the thermal oil in the thermal oil collection box 2 to the filter jacket 1;

[0036] When the temperature rise process is abnormal or other abnormalities cause the airbag 51 to fail to work normally, the pressure relief valve 22 is opened to connect the outside air to stabilize the pressure, and the airbag 51 is repaired at an appropriate time.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective device for a melt filter, comprising a filter jacket, a heat transfer oil collection box connected to the filter jacket through an exhaust pipe, and the other end of the heat transfer oil collection box is connected to the filter jacket through a return pipe, characterized in that: It also includes an airbag telescopic box arranged above the heat transfer oil collection box, wherein the airbag telescopic box has an airbag built in, and the other end of the airbag telescopic box is connected to the heat transfer oil collection box.

2. A protective device for a melt filter according to claim 1, characterized in that: A threaded pipe is arranged on the top of the heat transfer oil collection box, and the interface end of the air bag is threadedly connected to the threaded pipe.

3. The protective device for a melt filter according to claim 1, characterized in that: The heat transfer oil collection box is provided with a pressure relief valve.

4. The protective device for a melt filter according to claim 1, characterized in that: The return pipe is provided with a flange and a return pipe valve, and the return pipe valve is located on a side close to the heat transfer oil collection tank.

5. The protective device for a melt filter according to claim 1, characterized in that: The outer side of the exhaust pipe is provided with heat preservation cotton.

6. A protective device for a melt filter according to claim 5, characterized in that: The exhaust pipe includes a first longitudinal pipe connected to the thermal oil collection box and a second longitudinal pipe connected to the filter jacket. The first longitudinal pipe and the second longitudinal pipe are connected via a connecting pipe, and the thermal insulation cotton is wrapped on the outer sides of the second longitudinal pipe and the connecting pipe.

7. A protective device for a melt filter according to claim 6, characterized in that: The connecting pipe is obliquely connected between the first longitudinal pipe and the second longitudinal pipe, and the height of the first longitudinal pipe is lower than that of the second longitudinal pipe.

8. The protective device for a melt filter according to claim 1, characterized in that: A detachable grid cover is arranged on the top of the airbag telescopic box.

9. The protective device for a melt filter according to claim 1, characterized in that: A guide plate is arranged on the inner bottom wall of the heat transfer oil collection box.

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