Vacuum oil quenching furnace with filtering structure

Abstract

The utility model discloses a vacuum oil quenching furnace with a filter structure, which comprises a furnace body, a plate radiator, an oil pumping pipe, an oil inlet pipe, an oil outlet pipe, an oil return pipe and an oil pump, an oil storage tank is arranged at the bottom of the furnace body, the plate radiator is fixed on the outer top of the furnace body, and one end of the oil pumping pipe is communicated with one side of the oil storage tank. The other end of the oil pumping pipe is communicated with one end of the oil inlet pipe, the other end of the oil inlet pipe is communicated with an oil inlet of the oil pump, one end of the oil outlet pipe is communicated with an oil outlet of the oil pump, and the other end of the oil outlet pipe is communicated with the inlet end of the plate radiator. The other end of the oil return pipe is communicated with the other side of the oil storage tank; a filtering device is connected between the oil pumping pipe and the oil inlet pipe; a ball valve is mounted on the oil pumping pipe; through the arrangement of the filtering device, the filtering device can prevent impurities mingled in mineral oil from entering the oil pump, and therefore the situation that the oil pump is abraded by the impurities can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum oil quenching furnaces, in particular to a vacuum oil quenching furnace with a filtering structure. Background Art

[0002] The vacuum oil quenching furnace is a device used for heat treatment of workpieces. When the vacuum oil quenching furnace performs heat treatment on the workpiece, it can first heat the workpiece, and then immerse the heated workpiece into low-temperature mineral oil, thereby achieving heat treatment of the workpiece.

[0003] In order to realize real-time cooling of mineral oil, the vacuum oil quenching furnace currently on the market includes a furnace body, a plate radiator, an oil extraction pipe, an oil inlet pipe, an oil outlet pipe, an oil return pipe and an oil pump. An oil storage tank is arranged at the bottom of the furnace body, and the plate radiator is fixed on the outer top of the furnace body. One end of the oil extraction pipe is connected with one side of the oil storage tank, and the other end of the oil extraction pipe is connected with one end of the oil inlet pipe, and the other end of the oil inlet pipe is connected with the oil inlet of the oil pump, and one end of the oil outlet pipe is connected with the oil outlet of the oil pump, and the other end of the oil outlet pipe is connected with the inlet end of the plate radiator, and one end of the oil return pipe is connected with the outlet end of the plate radiator, and the other end of the oil return pipe is connected with the other side of the oil storage tank. When the oil pump is working, the oil pump can The pipe and the oil inlet pipe absorb the mineral oil in the oil storage tank, and then the oil pump can pump the mineral oil into the plate radiator, the plate radiator can cool the mineral oil entering into it, and the mineral oil can flow back to the oil storage tank through the oil return pipe after being cooled by the plate radiator, that is, through the above steps, the circulating cooling of the mineral oil in the oil storage tank can be achieved; however, after the workpiece is oil-quenched with mineral oil, impurities dropped from the workpiece will be mixed with the mineral oil, so that when the oil pump extracts the mineral oil in the oil storage tank, the impurities mixed in the mineral oil will enter the oil pump along with the mineral oil, which will easily cause the oil pump to be worn by the impurities, that is, the service life of the oil pump will be reduced. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a vacuum oil quenching furnace with a filtering structure. Through the setting of a filtering device, the filtering device can block impurities mixed in the mineral oil from entering the oil pump, thereby effectively preventing the oil pump from being worn by impurities, that is, the service life of the oil pump can be extended.

[0005] The utility model discloses a vacuum oil quenching furnace with a filtering structure, comprising a furnace body, a plate radiator, an oil extraction pipe, an oil inlet pipe, an oil outlet pipe, an oil return pipe and an oil pump. An oil storage tank is arranged at the bottom of the furnace body, the plate radiator is fixed on the outer top of the furnace body, one end of the oil extraction pipe is communicated with one side of the oil storage tank, the other end of the oil extraction pipe is communicated with one end of the oil inlet pipe, the other end of the oil inlet pipe is communicated with the oil inlet of the oil pump, one end of the oil outlet pipe is communicated with the oil outlet of the oil pump, the other end of the oil outlet pipe is communicated with the inlet end of the plate radiator, one end of the oil return pipe is communicated with the outlet end of the plate radiator, and the other end of the oil return pipe is communicated with the other side of the oil storage tank; a filtering device is connected between the oil extraction pipe and the oil inlet pipe, the filtering device is used for filtering impurities in the mineral oil to prevent the impurities from entering the oil pump with the mineral oil; a ball valve is installed on the oil extraction pipe.

[0006] After the utility model adopts the above structure, when the mineral oil from the oil storage tank is about to enter the oil pump, the filtering device can block the impurities mixed in the mineral oil from entering the oil pump, thereby effectively avoiding the oil pump from being worn by the impurities, that is, the service life of the oil pump can be extended.

[0007] The utility model provides a vacuum oil quenching furnace with a filtering structure, wherein the filtering device comprises a connecting pipe, a retaining sleeve and a filtering mesh cylinder; one end of the connecting pipe is inserted into the other end of the oil extraction pipe and can slide relative to the oil extraction pipe, one end of the connecting pipe is circumferentially sealed with the oil extraction pipe and the connecting pipe can rotate relative to the oil extraction pipe; the retaining sleeve is sleeved on the outside of one end of the oil extraction pipe and is threadedly fastened to the oil extraction pipe, the other end of the connecting pipe movably passes through the retaining sleeve and then extends out of the retaining sleeve, a first annular step is arranged on the outer wall of one end of the connecting pipe, the first annular step is used to abut against the retaining sleeve to prevent the connecting pipe from being separated from the oil extraction pipe; a A second annular step is arranged, the filter cylinder is inserted into one end of the oil inlet pipe, and a gap is left between the outer wall of the filter cylinder and the inner wall of the oil inlet pipe, an annular convex edge is arranged on the outer wall of the open end of the filter cylinder, the annular convex edge is supported on the second annular step, the other end of the connecting pipe is threadedly fastened with the side wall of the second annular step and circumferentially sealed, and the annular convex edge is pressed against the second annular step through the other end of the connecting pipe; after adopting this filtering device, when the oil pump is working, the mineral oil from the oil storage tank can enter the connecting pipe through the oil extraction pipe, and then the mineral oil entering the connecting pipe can flow through The filter screen cartridge enters the oil pump through the oil inlet pipe. When the mineral oil flows through the filter screen cartridge, the impurities mixed in the mineral oil can be intercepted by the filter screen cartridge, and the filtered mineral oil can enter the oil pump, thereby filtering the mineral oil, that is, preventing impurities from entering the oil pump; when the filter screen cartridge needs to be cleaned, first close the ball valve, then loosen the connecting pipe with a wrench to separate the other end of the connecting pipe from the oil inlet pipe, and then push the connecting pipe toward one side of the oil pumping pipe, and then take the filter screen cartridge out of one end of the oil inlet pipe. At this time, the filter screen cartridge can be cleaned. After the cylinder is cleaned, the filter screen cylinder is installed back into one end of the oil inlet pipe, so that the annular convex edge is abutted against the second annular step, and then the connecting tube is pulled toward one side of the oil inlet pipe, and then the other end of the connecting tube is threadedly fastened to one end of the oil inlet pipe by a wrench; in the above structure, the distance between the retaining sleeve and one end of the oil inlet pipe is greater than the length of the filter screen cylinder, for example, the distance between the retaining sleeve and one end of the oil inlet pipe is twice or three times the length of the filter screen cylinder, so that in the process of removing the filter screen cylinder from one end of the oil inlet pipe, interference between the filter screen cylinder and the retaining cover and one end of the oil inlet pipe can be avoided.

[0008] The utility model discloses a vacuum oil quenching furnace with a filtering structure, wherein the filtering device further comprises a pull ring and two connecting arms which are symmetrically arranged in an upper and lower manner, one end of the two connecting arms are welded and fixed to the outer side wall of the pull ring, and the other end of the two connecting arms are welded and fixed to the inner wall of the opening end of the filter screen cylinder; after adopting this structure, when it is necessary to take out the filter screen cylinder from one end of the oil inlet pipe, the pull ring can be pulled by fingers, and at this time, the connecting arms can pull the filter screen cylinder to facilitate taking out the filter screen cylinder from one end of the oil inlet pipe.

[0009] The utility model discloses a vacuum oil quenching furnace with a filtering structure, wherein an annular groove is arranged on the outer wall of a connecting pipe between a retaining sleeve and an oil inlet pipe, and the inner side wall of the annular groove is a regular hexagonal structure; after adopting this structure, when a wrench is used to twist the connecting pipe, the wrench can be clamped on the annular groove, thereby facilitating the wrench to twist the connecting pipe.

[0010] The utility model discloses a vacuum oil quenching furnace with a filtering structure, wherein a first sealing ring is embedded on the outer wall of one end of a connecting pipe, and the first sealing ring is used to seal the gap between the connecting pipe and the oil extraction pipe; after adopting this structure, the first sealing ring can reliably seal the gap between the connecting pipe and the oil extraction pipe.

[0011] The utility model discloses a vacuum oil quenching furnace with a filtering structure, wherein a second sealing ring is embedded on the outer wall of the other end of the connecting pipe, and the second sealing ring is used to seal the gap between the connecting pipe and the side wall of the second annular step; after adopting this structure, the second sealing ring can reliably seal the gap between the connecting pipe and the side wall of the second annular step. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1 It is a partial cross-sectional structural schematic diagram of the utility model;

[0014] Figure 2 for Figure 1 Schematic diagram of the structure after enlargement at A in the middle. DETAILED DESCRIPTION

[0015] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0016] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0017] like Figure 1-2 As shown, the vacuum oil quenching furnace with a filtering structure of the utility model comprises a furnace body 1, a plate radiator 2, an oil extraction pipe 3, an oil inlet pipe 4, an oil outlet pipe 5, an oil return pipe 6 and an oil pump 7. An oil storage tank 11 is arranged at the bottom of the furnace body 1, the plate radiator 2 is fixed on the outer top of the furnace body 1, one end of the oil extraction pipe 3 is communicated with one side of the oil storage tank 11, the other end of the oil extraction pipe 3 is communicated with one end of the oil inlet pipe 4, the other end of the oil inlet pipe 4 is communicated with the oil inlet of the oil pump 7, one end of the oil outlet pipe 5 is communicated with the oil outlet of the oil pump 7, the other end of the oil outlet pipe 5 is communicated with the inlet end of the plate radiator 2, one end of the oil return pipe 6 is communicated with the outlet end of the plate radiator 2, and the other end of the oil return pipe 6 is communicated with the other side of the oil storage tank 11; a filtering device is connected between the oil extraction pipe 3 and the oil inlet pipe 4, the filtering device is used to filter impurities in the mineral oil to prevent the impurities from entering the oil pump 7 with the mineral oil; a ball valve 8 is installed on the oil extraction pipe 3.

[0018] The filtering device includes a connecting pipe 91, a stopper sleeve 92 and a filter screen cylinder 93; one end of the connecting pipe 91 is inserted into the other end of the oil pumping pipe 3 and can slide relative to the oil pumping pipe 3, one end of the connecting pipe 91 is circumferentially sealed with the oil pumping pipe 3 and the connecting pipe 91 can rotate relative to the oil pumping pipe 3; the stopper sleeve 92 is sleeved on the outside of one end of the oil pumping pipe 3 and is threadedly fastened to the oil pumping pipe 3, the other end of the connecting pipe 91 is movable through the stopper sleeve 92 and then extends out of the stopper sleeve 92, and a first annular step 911 is provided on the outer wall of one end of the connecting pipe 91, and the first annular step 911 is used to abut against the stopper sleeve 92 to prevent the connecting pipe 91 from being separated from the oil pumping pipe 3; the oil inlet pipe 4 A second annular step 41 is provided on the inner wall of one end, the filter screen cartridge 93 is inserted into one end of the oil inlet pipe 4, and a gap is left between the outer wall of the filter screen cartridge 93 and the inner wall of the oil inlet pipe 4, and an annular convex edge 931 is provided on the outer wall of the open end of the filter screen cartridge 93, and the annular convex edge 931 is supported on the second annular step 41, and the other end of the connecting pipe 91 is threadedly fastened to the side wall of the second annular step 41 and circumferentially sealed, and the annular convex edge 931 is pressed against the second annular step 41 through the other end of the connecting pipe 91; by adopting this filtering device, when the oil pump is working, the mineral oil from the oil storage tank can enter through the oil extraction pipe into the connecting pipe, and then, the mineral oil that has entered the connecting pipe can flow through the filter cylinder and enter the oil pump through the oil inlet pipe. When the mineral oil flows through the filter cylinder, the impurities mixed in the mineral oil can be intercepted by the filter cylinder, and the filtered mineral oil can enter the oil pump, thereby achieving the filtration of the mineral oil, that is, it can prevent impurities from entering the oil pump; when it is necessary to clean the filter cylinder, first close the ball valve, then loosen the connecting pipe with a wrench to separate the other end of the connecting pipe from the oil inlet pipe, and then push the connecting pipe toward one side of the oil pumping pipe, and then take the filter cylinder out from one end of the oil inlet pipe, and then you can clean it. The filter screen cartridge is cleaned. After the filter screen cartridge is cleaned, the filter screen cartridge is installed back into one end of the oil inlet pipe, so that the annular convex edge abuts against the second annular step, and then the connecting tube is pulled toward one side of the oil inlet pipe, and then the other end of the connecting tube is threadedly fastened to one end of the oil inlet pipe by a wrench; in the above structure, the distance between the retaining sleeve and one end of the oil inlet pipe is greater than the length of the filter screen cartridge, for example, the distance between the retaining sleeve and one end of the oil inlet pipe is twice or three times the length of the filter screen cartridge, so that in the process of removing the filter screen cartridge from one end of the oil inlet pipe, interference between the filter screen cartridge and the retaining cover and one end of the oil inlet pipe can be avoided.

[0019] The filtering device also includes a pull ring 94 and two connecting arms 95 which are symmetrically arranged in an upper and lower direction. One end of the two connecting arms 95 is welded and fixed to the outer wall of the pull ring 94, and the other end of the two connecting arms 95 is welded and fixed to the inner wall of the open end of the filter screen cylinder 93. After adopting this structure, when the filter screen cylinder needs to be removed from one end of the oil inlet pipe, the pull ring can be pulled by the fingers, and at this time, the connecting arm can pull the filter screen cylinder to facilitate the removal of the filter screen cylinder from one end of the oil inlet pipe.

[0020] An annular groove 912 is provided on the outer wall of the connecting pipe 91 located between the stop sleeve 92 and the oil inlet pipe 4, and the inner wall of the annular groove 912 is a regular hexagonal structure; by adopting this structure, when a wrench is used to tighten the connecting pipe, the wrench can be clamped on the annular groove, thereby facilitating the wrench to tighten the connecting pipe.

[0021] A first sealing ring 96 is embedded on the outer wall of one end of the connecting pipe 91, and the first sealing ring 96 is used to seal the gap between the connecting pipe 91 and the oil extraction pipe 3; by adopting this structure, the first sealing ring can reliably seal the gap between the connecting pipe and the oil extraction pipe.

[0022] A second sealing ring 97 is embedded on the outer wall of the other end of the connecting pipe 91, and the second sealing ring 97 is used to seal the gap between the connecting pipe 91 and the side wall of the second annular step 41; by adopting this structure, the second sealing ring can reliably seal the gap between the connecting pipe and the side wall of the second annular step.

[0023] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A vacuum oil quenching furnace with a filtering structure, comprising a furnace body (1), a plate radiator (2), an oil extraction pipe (3), an oil inlet pipe (4), an oil outlet pipe (5), an oil return pipe (6) and an oil pump (7), wherein an oil storage tank (11) is arranged at the bottom of the furnace body (1), the plate radiator (2) is fixed on the outer top of the furnace body (1), one end of the oil extraction pipe (3) is connected to one side of the oil storage tank (11), and the other end of the oil extraction pipe (3) is connected to the inlet pipe (4). One end of the oil pipe (4) is connected to the oil inlet of the oil pump (7), the other end of the oil outlet pipe (5) is connected to the oil outlet of the oil pump (7), the other end of the oil outlet pipe (5) is connected to the inlet end of the plate radiator (2), one end of the oil return pipe (6) is connected to the outlet end of the plate radiator (2), and the other end of the oil return pipe (6) is connected to the other side of the oil storage tank (11); characterized in that: A filtering device is connected between the oil extraction pipe (3) and the oil inlet pipe (4), and the filtering device is used to filter impurities in the mineral oil to prevent the impurities from entering the oil pump (7) along with the mineral oil; a ball valve (8) is installed on the oil extraction pipe (3); the filtering device comprises a connecting pipe (91), a retaining sleeve (92) and a filtering mesh cylinder (93); one end of the connecting pipe (91) is inserted into the other end of the oil extraction pipe (3) and can slide relative to the oil extraction pipe (3); one end of the connecting pipe (91) is circumferentially sealed with the oil extraction pipe (3) and the connecting pipe (91) can rotate relative to the oil extraction pipe (3); the retaining sleeve (92) is sleeved on the outside of one end of the oil extraction pipe (3) and is threadedly fastened to the oil extraction pipe (3); the other end of the connecting pipe (91) movably passes through the retaining sleeve (92) and then extends out of the retaining sleeve (92); A first annular step (911) is provided on the outer wall, and the first annular step (911) is used to abut against the stopper sleeve (92) to prevent the connecting pipe (91) from being separated from the oil extraction pipe (3); a second annular step (41) is provided on the inner wall of one end of the oil inlet pipe (4); the filter screen cylinder (93) is inserted into one end of the oil inlet pipe (4), and a gap is left between the outer wall of the filter screen cylinder (93) and the inner wall of the oil inlet pipe (4); an annular convex edge (931) is provided on the outer wall of the open end of the filter screen cylinder (93), and the annular convex edge (931) is supported on the second annular step (41); the other end of the connecting pipe (91) is threadedly fastened to the side wall of the second annular step (41) and circumferentially sealed; the annular convex edge (931) is pressed against the second annular step (41) through the other end of the connecting pipe (91).

2. The vacuum oil quenching furnace with a filtering structure according to claim 1, characterized in that: The filtering device further comprises a pull ring (94) and two connecting arms (95) symmetrically arranged in an upper and lower manner, one end of the two connecting arms (95) being welded and fixed to the outer wall of the pull ring (94), and the other end of the two connecting arms (95) being welded and fixed to the inner wall of the open end of the filter screen cylinder (93).

3. The vacuum oil quenching furnace with a filtering structure according to claim 1 or 2, characterized in that: An annular groove (912) is provided on the outer wall of the connecting pipe (91) between the stopper sleeve (92) and the oil inlet pipe (4), and the inner side wall of the annular groove (912) is a regular hexagonal structure.

4. The vacuum oil quenching furnace with a filtering structure according to claim 1, characterized in that: A first sealing ring (96) is embedded on the outer wall of one end of the connecting pipe (91), and the first sealing ring (96) is used to seal the gap between the connecting pipe (91) and the oil pumping pipe (3).

5. The vacuum oil quenching furnace with a filtering structure according to claim 1, characterized in that: A second sealing ring (97) is embedded on the outer wall of the other end of the connecting pipe (91), and the second sealing ring (97) is used to seal the gap between the connecting pipe (91) and the side wall of the second annular step (41).

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