Filter element structure for vacuum oil filter

Abstract

The utility model discloses a filter element structure for a vacuum oil filter, which belongs to the field of vacuum oil filters and comprises a support inner net, filter paper is wrapped outside the support inner net, and a lower end cover and an upper end cover are respectively arranged at the bottom and the top of the support inner net. A supporting mechanism used for improving the stability of the supporting inner net is arranged at the position, located between the lower end cover and the upper end cover, in the supporting inner net, a pressing assembly used for reinforcing the supporting mechanism is arranged in the supporting inner net, and the supporting mechanism comprises a fixing rod arranged in the axial direction of the supporting inner net; the fixing rod is provided with an ejector head assembly abutting against the inner wall of the supporting inner net through a connecting sleeve. According to the filter element structure for the vacuum oil filter, a certain buffer space can be provided through the supporting piece capable of elastically buffering when the filter element is subjected to external pressure, so that the impact of the pressure on the filter element structure is effectively dispersed and relieved, and the filter element is prevented from being damaged due to excessive pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum oil filters, in particular to a filter core structure used for vacuum oil filters. Background Art

[0002] A vacuum oil filter is a device used for on-site oil filtration and replenishment of various oil-immersed transformers, oil-immersed current and voltage transformers, and high-voltage, oil-reduced circuit breakers. The filter element is one of its core components. It not only removes impurities and moisture from the oil, improving oil quality, but also protects the equipment from damage by impurities and moisture, enhancing operational efficiency and stability.

[0003] When the vacuum oil filter is working, the oil pump will generate a certain positive pressure to provide driving force for the oil to flow through the filter element for filtration. The flow of oil will also generate a certain flow pressure. Since the filter element of the current vacuum oil filter only uses a layer of supporting inner mesh as the support of the filter element, its pressure resistance is weak. When these pressures act on the filter element, it is easy to cause the filter element to deform and be damaged, resulting in a short service life of the filter element. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the filter element of the existing vacuum oil filter has weak pressure resistance and is easily deformed and damaged when subjected to oil pump pressure and oil flow pressure, and to propose a filter element structure for a vacuum oil filter.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technology: a filter element structure for a vacuum oil filter, including a supporting inner net, the outside of the supporting inner net is wrapped with filter paper, the bottom and top of the supporting inner net are respectively provided with a lower end cover and an upper end cover, and the interior of the supporting inner net is provided with a supporting mechanism for improving the stability of the supporting inner net at a position between the lower end cover and the upper end cover, and the interior of the supporting inner net is provided with a clamping component for reinforcing the supporting mechanism.

[0006] As a further description of the above technical solution: the support mechanism includes a fixing rod arranged axially along the supporting inner net, and a head assembly abutting against the inner wall of the supporting inner net is provided on the fixing rod through a connecting sleeve.

[0007] As a further description of the above technical solution: the head assembly includes a mounting sleeve connected to the connecting sleeve, and a push rod is sleeved on the end of the mounting sleeve away from the fixed rod, and a spring is provided between the end of the push rod located inside the mounting sleeve and the inner wall of the mounting sleeve.

[0008] As a further description of the above technical solution: a hemispherical rubber pad is provided at one end of the push rod away from the mounting sleeve, and a limit block is provided at the other end of the push rod.

[0009] As a further description of the above technical solution: the installation sleeve is detachably connected to the connecting sleeve via a threaded end.

[0010] As a further description of the above technical solution: a positioning end is provided at the bottom of the fixing rod, and a limiting strip is provided on the positioning end;

[0011] A positioning sleeve that matches the positioning end head is provided on the top of the lower end cover, and a positioning slot that matches the limiting strip is opened on the positioning sleeve.

[0012] As a further description of the above technical solution: the clamping assembly includes a clamping end head threadedly connected to the supporting inner net, a filter screen is provided on the clamping end head, and a guide sleeve is provided in the middle position of the filter screen to cooperate with the fixing rod;

[0013] The top of the fixing rod is provided with a limiting baffle matched with the guide sleeve.

[0014] As a further description of the above technical solution: the filter paper is folded to form pleated strips arranged along the axial direction of the supporting inner net.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] The elastically buffered support can provide a certain buffer space when the filter element is subjected to external pressure, thereby effectively dispersing and reducing the impact of pressure on the filter element structure, avoiding damage to the filter element due to excessive pressure. By reducing the stress concentration of the filter element under high pressure environment, the support can extend the overall service life of the filter element, reduce the replacement frequency, and reduce maintenance costs;

[0017] The support mechanism can maintain the shape stability of the filter element to prevent deformation that may affect the filtering effect. The stable filter element shape helps ensure that impurities in the oil can be more effectively intercepted and filtered, reducing the residual impurities inside or on the surface of the filter element and improving the cleanliness of the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shows a schematic diagram of the overall structure provided according to an embodiment of the utility model;

[0019] Figure 2 A partially cutaway schematic diagram according to an embodiment of the present utility model is shown;

[0020] Figure 3 A schematic structural diagram of a support mechanism according to an embodiment of the present invention is shown;

[0021] Figure 4 A schematic structural diagram of a mandrel assembly according to an embodiment of the present invention is shown;

[0022] Figure 5 A schematic structural diagram of a push rod according to an embodiment of the present utility model is shown;

[0023] Figure 6 Shows a schematic structural diagram of the lower end cover provided according to an embodiment of the utility model;

[0024] Figure 7 A schematic structural diagram of a compression assembly according to an embodiment of the present invention is shown;

[0025] Figure 8 The figure shows a schematic structural diagram of filter paper provided according to an embodiment of the present utility model.

[0026] Legend:

[0027] 1. Support inner net; 2. Filter paper; 21. Pleated strip; 3. Lower end cover; 31. Positioning sleeve; 32. Positioning slot; 4. Upper end cover; 5. Support mechanism; 51. Fixing rod; 52. Connecting sleeve; 53. Ejector assembly; 531. Mounting sleeve; 532. Ejector rod; 5321. Rubber pad; 5322. Limit block; 533. Spring; 534. Threaded end; 54. Positioning end; 55. Limit strip; 56. Limit baffle; 6. Clamping assembly; 61. Clamping end; 62. Filter screen; 63. Guide sleeve. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Reference Figures 1-8 The present embodiment provides a filter element structure for a vacuum oil filter, comprising a supporting inner net 1, the outside of the supporting inner net 1 being wrapped with filter paper 2, the filter paper 2 being folded to form pleated strips 21 arranged axially along the supporting inner net 1, the bottom and top of the supporting inner net 1 being respectively provided with a lower end cover 3 and an upper end cover 4, and the interior of the supporting inner net 1 being located between the lower end cover 3 and the upper end cover 4. A supporting mechanism 5 for improving the stability of the supporting inner net 1 is provided, and a pressing component 6 for reinforcing the supporting mechanism 5 is provided inside the supporting inner net 1.

[0030] In the present invention, when the filter element is in use, the filter element structure is installed and fixed on the vacuum oil filter through the upper end cover 4. The oil flows under the action of the oil pump, and then the oil enters the supporting inner net 1 after being filtered through the filter paper 2 outside the supporting inner net 1, and then flows out from the pipeline connected to the upper end cover 4. The oil is filtered by the filter paper 2 outside the supporting inner net 1. The several pleated strips 21 formed on the filter paper 2 can effectively increase the contact area between the filter paper 2 and the oil, thereby achieving better filtration. A supporting mechanism 5 is fixed in the supporting inner net 1 through the clamping component 6 and the lower end cover 3. The supporting mechanism 5 can provide a certain buffer space when the filter element is subjected to external pressure, thereby effectively dispersing and reducing the impact of pressure on the filter element structure, and avoiding damage to the filter element due to excessive pressure.

[0031] Specifically, such as Figure 2 、 Figure 3 and Figure 6 As shown, the support mechanism 5 includes a fixing rod 51 arranged axially along the supporting inner net 1 , and a plug assembly 53 is provided on the fixing rod 51 through a connecting sleeve 52 to abut against the inner wall of the supporting inner net 1 .

[0032] The fixing rod 51 is arranged along the axis of the supporting inner net 1. The plug assembly 53 connected to the fixing rod 51 through the connecting sleeve 52 abuts against the inner wall of the supporting inner net 1. The plug assembly 53 can reinforce the supporting inner net 1, thereby maintaining the shape stability of the filter element and preventing it from affecting the filtering effect due to deformation. The stable filter element shape helps to ensure that impurities in the oil can be more effectively intercepted and filtered.

[0033] It should be noted that a positioning end 54 is provided at the bottom of the fixing rod 51, and a limiting strip 55 is provided on the positioning end 54. A positioning sleeve 31 that cooperates with the positioning end 54 is provided on the top of the lower end cover 3, and a positioning slot 32 that cooperates with the limiting strip 55 is provided on the positioning sleeve 31. When installing the support mechanism 5, the positioning end 54 at the bottom of the fixing rod 51 is aligned with the positioning sleeve 31 of the lower end cover 3, and then the positioning end 54 is inserted into the positioning sleeve 31. The limiting strip 55 on the positioning end 54 cooperates with the positioning slot 32 on the positioning sleeve 31 to avoid rotation of the fixing rod 51 during use, thereby ensuring the stability of the entire support mechanism 5.

[0034] Specifically, such as Figure 3-Figure 5As shown, the ejector assembly 53 includes a mounting sleeve 531 connected to the connecting sleeve 52, and a ejector rod 532 is sleeved on the end of the mounting sleeve 531 away from the fixed rod 51, and a spring 533 is provided between the end of the ejector rod 532 located inside the mounting sleeve 531 and the inner wall of the mounting sleeve 531, a hemispherical rubber pad 5321 is provided on the end of the ejector rod 532 away from the mounting sleeve 531, and a limiting block 5322 is provided on the other end of the ejector rod 532, and the mounting sleeve 531 is detachably connected to the connecting sleeve 52 through a threaded end 534.

[0035] The push rod 532 is capable of telescopic movement on the mounting sleeve 531. The spring 533 in the mounting sleeve 531 and the rubber pad 5321 on the push rod 532 provide the push head assembly 53 with a buffering property. When the push head assembly 53 rests against the supporting inner net 1, the impact of pressure on the filter element structure can be dispersed and reduced, thereby preventing the filter element from being damaged due to excessive pressure. By reducing stress concentration on the filter element under high-pressure conditions, the overall service life of the filter element can be extended, the replacement frequency can be reduced, and the maintenance cost can be lowered.

[0036] When the mandrel assembly 53 needs to be disassembled for maintenance or replacement, the threaded end 534 on the mounting sleeve 531 can be unscrewed from the connecting sleeve 52 , which is simple and convenient, and facilitates the disassembly and maintenance of the mandrel assembly 53 .

[0037] Specifically, such as Figure 2 and Figure 7 As shown, the clamping assembly 6 includes a clamping end 61 threadedly connected to the supporting inner net 1, a filter screen 62 is provided on the clamping end 61, and a guide sleeve 63 that cooperates with the fixed rod 51 is provided in the middle position of the filter screen 62, and a limit baffle 56 that cooperates with the guide sleeve 63 is provided at the top of the fixed rod 51.

[0038] Among them, when fixing the support mechanism 5, the clamping end 61 is screwed onto the top of the support inner net 1 through a thread. The support inner net 1 is provided with a thread that matches the clamping end 61. When the clamping end 61 is tightened, the guide sleeve 63 passes through the fixing rod 51. The design of the filter screen 62 between the clamping end 61 and the guide sleeve 63 can ensure that the filtration of the filter element is not affected while ensuring that the support mechanism 5 is fixed, and the oil filtered through the filter paper 2 can also be filtered again through the filter screen 62, which can not only improve the stability of the support mechanism 5, but also improve the filtration effect of the filter element.

[0039] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A filter element structure for a vacuum oil filter, characterized in that: The invention comprises a supporting inner net (1), the outer portion of the supporting inner net (1) is wrapped with filter paper (2), the bottom and top of the supporting inner net (1) are respectively provided with a lower end cover (3) and an upper end cover (4), and a supporting mechanism (5) for improving the stability of the supporting inner net (1) is provided at a position between the lower end cover (3) and the upper end cover (4) inside the supporting inner net (1), and a pressing assembly (6) for reinforcing the supporting mechanism (5) is provided inside the supporting inner net (1).

2. The filter element structure for a vacuum oil filter according to claim 1, characterized in that: The support mechanism (5) comprises a fixing rod (51) arranged axially along the supporting inner net (1); a plug assembly (53) abutting against the inner wall of the supporting inner net (1) is provided on the fixing rod (51) via a connecting sleeve (52).

3. The filter element structure for a vacuum oil filter according to claim 2, characterized in that: The mandrel assembly (53) comprises a mounting sleeve (531) connected to the connecting sleeve (52); an end of the mounting sleeve (531) away from the fixing rod (51) is sleeved with a mandrel (532); and a spring (533) is provided between an end of the mandrel (532) located inside the mounting sleeve (531) and the inner wall of the mounting sleeve (531).

4. A filter element structure for a vacuum oil filter according to claim 3, characterized in that: A hemispherical rubber pad (5321) is provided at one end of the push rod (532) away from the mounting sleeve (531), and a limiting block (5322) is provided at the other end of the push rod (532).

5. A filter element structure for a vacuum oil filter according to claim 3 or 4, characterized in that: The installation sleeve (531) is detachably connected to the connecting sleeve (52) via a threaded end (534).

6. The filter element structure for a vacuum oil filter according to claim 2, characterized in that: The bottom of the fixing rod (51) is provided with a positioning end (54), and a limiting strip (55) is provided on the positioning end (54); A positioning sleeve (31) matching with the positioning end (54) is provided on the top of the lower end cover (3), and a positioning slot (32) matching with the limiting strip (55) is provided on the positioning sleeve (31).

7. The filter element structure for a vacuum oil filter according to claim 2, characterized in that: The pressing assembly (6) includes a pressing end head (61) threadedly connected to the supporting inner net (1), a filter screen (62) is provided on the pressing end head (61), and a guide sleeve (63) matched with the fixing rod (51) is provided in the middle position of the filter screen (62); The top of the fixing rod (51) is provided with a limiting baffle (56) that matches the guide sleeve (63).

8. The filter element structure for a vacuum oil filter according to claim 1, characterized in that: The filter paper (2) is folded to form pleated strips (21) arranged axially along the supporting inner net (1).

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