Modularized oil drain valve capable of being quickly disassembled and assembled

Abstract

The invention relates to the technical field of oil drain valves, in particular to a modularized quick-dismounting oil drain valve which comprises a valve shell, an oil drain pipe and a threaded sleeve, the valve shell comprises an outer protective cylinder, the oil drain pipe is fixedly arranged on the side wall of the outer protective cylinder, the threaded sleeve is coaxially and fixedly arranged on the top face of the outer protective cylinder, and a circulation cavity in the outer protective cylinder communicates with the oil drain pipe and the threaded sleeve; the oil drainage mechanism comprises a sealing cover coaxially connected to the outer side of the lower end of the outer protection cylinder in a sleeving mode and a valve element arranged in the circulation cavity in a clearance fit mode, the bottom face of the valve element is slidably connected with a first T-shaped rod in a sleeving mode, the lower end of the first T-shaped rod slidably penetrates through the sealing cover to be fixedly connected with a hexagonal block, and the first T-shaped rod is in spiral fit with the sealing cover; an external thread is formed in the outer side wall of the lower end of the outer protection cylinder, meanwhile, an internal thread used for being in spiral fit with the external thread is formed in the inner side wall of the sealing cover, the oil drain valve facilitates cleaning of internal oil sludge by workers and replacement of the structure, impurities in the oil storage structure can be effectively removed, and the overall practicability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of oil drain valves, and in particular to a modular, quickly disassembled oil drain valve. Background Art

[0002] The oil drain valve is a relatively common valve that is widely used in automobile engines and various machine tools. It is used to replace the traditional oil drain bolt. It is opened when the waste oil in the equipment needs to be discharged. During the waste oil discharge process, the design of the oil drain valve can form an oil vortex flow at the discharge inlet of the oil drain valve, thereby removing the stains inside the oil storage structure and effectively preventing the accumulation of debris inside the oil storage structure during oil discharge.

[0003] For example, the existing public document CN221402662U - Adjustable oil drain valve block assembly and the existing public document CN105782471A - Oil drain valve structure both disclose an oil drain valve and its related components. Although the existing oil drain valve can replace the oil drain bolt and be used in engines and various machine tools, the existing oil drain valve still has the following deficiencies in actual use:

[0004] 1. Existing oil drain valves are generally one-piece moldings. However, due to the presence of sludge in the dirty oil, the sludge will accumulate on the valve core inside the oil drain valve during a long period of oil discharge. The long-term accumulation of sludge on the valve core will not only lead to a lower sealing performance of the valve core, but also cause poor oil discharge. In this case, it is difficult for staff to clean the existing oil drain valve, making it less practical.

[0005] 2. Existing oil drain valves primarily create a vortex flow in the oil storage structure, discharging debris from the oil storage structure during draining. However, due to differences in the age of the oil storage structure, the length of time the waste oil has been stored in the oil storage structure, and the quality of the waste oil, it is difficult to effectively and thoroughly discharge debris from the oil storage structure through the angular kinetic energy generated by the fixed vortex flow.

[0006] Therefore, it is necessary to improve the existing technology to solve the above technical problems. Summary of the Invention

[0007] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0008] In view of the problem that a certain amount of inconveniently cleaned oil sludge will adhere to the interior of the above-mentioned existing oil drain valve during long-term use, thereby affecting the normal use of the oil drain valve, a modular quick-disassembly and assembly oil drain valve is proposed.

[0009] To solve the above technical problems, the present invention provides the following technical solutions: a modular quick-disassembly and assembly oil drain valve, comprising: a valve housing, including an outer casing, an oil drain pipe fixed on the side wall of the outer casing, and a threaded sleeve coaxially fixed on the top surface of the outer casing, and a flow chamber in the outer casing is connected to the oil drain pipe and the threaded sleeve respectively; and an oil drain mechanism, comprising a sealing cover coaxially sleeved on the outer side of the lower end of the outer casing and a valve core with a clearance fit in the flow chamber, a first T-shaped rod slidably sleeved on the bottom surface of the valve core, the lower end of the first T-shaped rod slides through the sealing cover and is fixedly connected to the hexagonal block, and the first T-shaped rod is screwed together with the sealing cover, an external thread is provided on the outer side wall of the lower end of the outer casing, and an internal thread for screwing together with the external thread is provided on the inner side wall of the sealing cover; the valve core is formed by integrally forming a column and a semicircular body located above the column, and when the lower end of the first T-shaped column is screwed together with the sealing cover, the valve core is used to block the flow between the flow chamber and the oil drain pipe.

[0010] The beneficial effects of the present invention are as follows: when the oil drain valve is in use, the first T-shaped rod can be rotated to drive the valve core to move in the vertical direction, thereby realizing the opening and closing between the flow chamber and the oil drain pipe, and the valve core can be removed from the outer casing by the spiral fitting arrangement between the sealing cover and the outer casing, so that on the one hand the valve core can be replaced, and on the other hand the sludge on the outer casing and the valve core can be effectively cleaned, so that the efficient use of the oil drain valve can be always maintained.

[0011] As a preferred solution of a modular quick-disassembly and assembly oil drain valve of the present invention, a fitting ring is fixedly sleeved on the outer side wall of the upper end of the outer casing, a sealing groove is opened on the top surface of the fitting ring along the circumferential direction, and a sealing ring is interference fit in the sealing groove; a twisting block is fixedly sleeved on the outer side wall of the middle part of the outer casing.

[0012] As a preferred solution of a modular quick-disassembly oil drain valve of the present invention, a blocking cover is slidably sleeved on the free end of the oil drain pipe, and the side wall of the blocking cover is fixedly connected to a ring through a connecting belt, the ring is slidably sleeved on the oil drain pipe, and a first limiting ring is fixedly sleeved on the outer side wall of the oil drain pipe between the ring and the blocking cover.

[0013] As a preferred solution of a modular quick-disassembly and assembly oil drain valve of the present invention, wherein: a fixing ring with an L-shaped vertical cross-section is fixedly sleeved at the inner lower end position of the threaded sleeve, and a filter pocket is coaxially arranged in the threaded sleeve above the fixing ring; the filter pocket is a cylindrical structure with a closed upper end, and filter holes are arranged in an array on the top plate and side walls of the filter pocket, the vertical cross-section of the top plate of the filter pocket is arc-shaped, an extension ring is fixedly sleeved on the outer side wall of the lower end of the filter pocket, and the extension ring is fixedly connected to the horizontal plate of the fixing ring by screws.

[0014] As a preferred solution of a modular quick-disassembly oil drain valve of the present invention, a telescopic groove is circumferentially provided inside the lower end of the outer casing, and a plurality of first through holes connected to the telescopic groove are circumferentially arranged in an array on the bottom surface of the outer casing, and second through holes are arranged on the sealing cover in one-to-one correspondence with the first through holes; a telescopic ring is provided in the telescopic groove, and locking columns for sliding engagement of the first through holes and the second through holes are fixed in an array on the bottom surface of the telescopic ring, and a spring is slidably sleeved in the telescopic groove above the telescopic ring.

[0015] As a preferred solution of the modular quick-disassembly oil drain valve of the present invention, a positioning blind hole is eccentrically opened on the bottom surface of the sealing cover.

[0016] As a preferred solution of a modular quick-disassembly oil drain valve of the present invention, it also includes an adjustment mechanism, which includes a storage tube fixedly connected to the side wall of the outer casing, a piston column slidably sleeved in the storage tube, and an air bag ring arranged below the fixed ring; the outer wall of the air bag ring is open and bonded to the inner wall of the threaded sleeve, an air groove is circumferentially provided in the threaded sleeve, the air groove and the interior of the air bag ring are connected through multiple air holes arranged in a circumferential array, and a connecting groove for connecting the air groove and the storage tube is provided in the outer casing.

[0017] In view of the fact that it is difficult for the existing oil drain valve to effectively discharge the debris inside the oil storage structure when in use, the modular quick-disassembly and assembly oil drain valve of the present invention is further optimized and improved, wherein: a second limit ring is fixedly connected to the inner wall of the threaded sleeve below the airbag ring in the circumferential direction; an I-shaped column is coaxially slidably sleeved in the piston column, and a convex groove for clearance fit of one end of the second T-shaped rod is provided on the end surface of the I-shaped column away from the outer casing, and a pressing plate is fixedly connected to the other end of the second T-shaped rod; an end cover is fixedly connected to the free end of the storage tube by a screw, and the second T-shaped rod is slidably sleeved in the end cover.

[0018] As a preferred solution of the modular quick-disassembly oil drain valve of the present invention, the communicating cavity formed by the airbag ring, the air groove, the communicating groove and the storage tube is filled with gas or liquid.

[0019] Another beneficial effect of the present invention is that when the oil drain valve is in use, the staff presses the pressing plate to drive the entire piston column to move in the storage tube through the second T-shaped rod, so that the gas or liquid can be adaptively moved and adjusted in the circulation chamber. Because the airbag ring itself has an elastic setting, when the piston column moves toward the side of the outer casing, the airbag ring will expand, and eventually the inner diameter of the airbag ring will become smaller. Under the premise of conservation of angular momentum, the flow velocity of the fluid will change at different radii. The vortex formed by the change in fluid flow velocity can effectively flush and drive the debris inside the oil storage structure, so that the debris inside the oil storage structure can be effectively cleaned and the service life of the oil storage structure can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0021] Figure 1 This is a schematic diagram of the overall structure of a modular, quick-disassembly oil drain valve.

[0022] Figure 2 For the present invention Figure 1 Bottom diagram of the structure.

[0023] Figure 3 For the present invention Figure 1 Vertical cross-sectional view of the structure along the axis of the oil drain pipe.

[0024] Figure 4 For the present invention Figure 1 Vertical cross-sectional view of the structure along the axis of the outer casing.

[0025] Figure 5 For the present invention Figure 1 Exploded view of the structure.

[0026] Figure 6 For the present invention Figure 5 Bottom diagram of the structure.

[0027] Figure 7 It is a schematic diagram of the overall structure of the valve housing in the present invention.

[0028] Figure 8 It is a vertical cross-sectional view of the valve housing in the present invention.

[0029] Figure 9 This is a diagram of the piston column, I-shaped column and second T-shaped rod ready for matching in the present invention. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0033] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0034] Example 1

[0035] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , which is the first embodiment of the present invention, provides a modular quick-disassembly and assembly oil drain valve. When the oil drain valve is in use, the threaded sleeve 103 in the valve housing 100 is screwed onto the oil drain port of the oil storage structure. The discharge of waste oil in the valve housing 100 can be achieved by adjusting the oil drain mechanism 200.

[0036] Specifically, the valve housing 100 includes an outer casing 101, an oil drain pipe 102 fixed to the side wall of the outer casing 101, and a threaded sleeve 103 coaxially fixed to the top surface of the outer casing 101, wherein a flow cavity 101e in the outer casing 101 is communicated with the oil drain pipe 102 and the threaded sleeve 103 respectively; and an oil drain mechanism 200, including a sealing cover 201 coaxially sleeved on the outer side of the lower end of the outer casing 101 and a valve core 202 with a clearance fit in the flow cavity 101e;

[0037] A fitting ring 101b is fixedly sleeved on the outer side wall of the upper end of the outer casing 101. A sealing groove 101b-2 is circumferentially opened on the top surface of the fitting ring 101b, and a sealing ring 101b-1 is interference-fitted in the sealing groove 101b-2. In this way, when the threaded sleeve 103 is screwed together with the oil storage structure, the sealing ring 101b-1 can play a role in sealing. A twisting block 101a is fixedly sleeved on the outer side wall of the middle part of the outer casing 101. The combination of the twisting block 101a and the tool can facilitate the installation and disassembly of the entire valve housing 100 by the staff.

[0038] A plugging cover 102a is slidably sleeved on the free end of the oil drain pipe 102, and the side wall of the plugging cover 102a is fixedly connected to the ring 102a-2 through a connecting belt 102a-1. The ring 102a-2 is slidably sleeved on the oil drain pipe 102, and a first limiting ring 102b is fixedly sleeved on the outer side wall of the oil drain pipe 102 between the ring 102a-2 and the plugging cover 102a. The first limiting ring 102b can limit the ring 102a-2. The plugging cover 102a is matched with the arrangement on the oil drain pipe 102, so that the plugging cover 102a can seal and dustproof the oil drain pipe 102 when the oil is not drained.

[0039] See Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, a first T-shaped rod 202a is slidably sleeved on the bottom surface of the valve core 202, and the lower end of the first T-shaped rod 202a slides through the sealing cover 201 and is fixedly connected to the hexagonal block 202a-1, and the first T-shaped rod 202a is screwed together with the sealing cover 201. An external thread 101f is provided on the outer side wall of the lower end of the outer casing 101, and an internal thread 201c for screwing together with the external thread 101f is provided on the inner side wall of the sealing cover 201. In this way, the sealing cover 201 can be rotated to achieve a detachable connection between the sealing cover 201 and the outer casing 101, thereby facilitating the removal of the entire valve core 202 for maintenance and replacement;

[0040] When the above arrangement is in use, the hexagonal block 202a-1 can drive the first T-shaped rod 202a to rotate through the cooperation between the tool and the hexagonal block 202a-1. Due to the clearance cooperation between the first T-shaped rod 202a and the valve core 202 and the spiral cooperation between the first T-shaped rod 202a and the sealing cover 201, the first T-shaped rod 202a can drive the valve core 202 to move in the axial direction of the first T-shaped rod 202a under the rotation of the first T-shaped rod 202a, thereby realizing the opening and closing of oil release.

[0041] Furthermore, the valve core 202 is integrally formed of a column and a semicircular body located above the column. When the lower end of the first T-shaped column is screwed with the sealing cover 201, the valve core 202 is used to seal the flow between the flow cavity 101e and the oil drain pipe 102.

[0042] In addition, it should be noted that, in actual use, a hose can be used in conjunction with the oil drain pipe 102 to discharge the waste oil into a predetermined container for collection, or a suction pump can be installed through the hose to extract the waste oil.

[0043] Example 2

[0044] Reference Figure 5 、 Figure 6 and Figure 7 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that this embodiment is proposed to avoid clogging of the interior of the valve housing 100 by debris in the oil storage structure when draining waste oil.

[0045] Specifically, a fixing ring 103c with an L-shaped vertical cross-section is fixedly sleeved at the lower end of the threaded sleeve 103, and a filter pocket 103a is coaxially arranged in the threaded sleeve 103 above the fixing ring 103c; the filter pocket 103a is a cylindrical structure with a closed upper end, and an array of filter holes 103a-1 are opened on the top plate and side walls of the filter pocket 103a, and an extension ring 103a-2 is fixedly sleeved on the outer side wall of the lower end of the filter pocket 103a, and the extension ring 103a-2 is fixedly connected to the horizontal plate of the fixing ring 103c by screws;

[0046] When the above arrangement is in use, the filter pocket 103a can be disassembled and installed through the cooperation between the extension ring 103a-2 and the fixing ring 103c, and the setting of the filter hole 103a-1 on the filter pocket 103a can achieve filtering when the waste oil is discharged.

[0047] Furthermore, the vertical cross-section of the top plate of the filter pocket 103a is in an arc shape, which can prevent debris from being accumulated on the top surface of the filter pocket 103a. Under the action of the flow of waste oil, complex debris on the top surface of the filter pocket 103a will be flushed out and eventually accumulated in the L-shaped groove of the fixing ring 103c, thereby preventing debris from clogging the filter hole 103a-1 on the filter pocket 103a.

[0048] Example 3

[0049] Reference Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 8, which is the third embodiment of the present invention, is based on the previous embodiment, except that this embodiment is proposed to prevent the sealing cover 201 and the outer casing 101 from loosening and falling off due to vibration during normal use of the equipment.

[0050] Specifically, a telescopic groove 101d is circumferentially formed inside the lower end of the outer casing 101, and a plurality of first through holes 101d-1 communicating with the telescopic groove 101d are formed in an array on the bottom surface of the outer casing 101 along the circumferential direction. Second through holes 201b are formed on the sealing cover 201 in a one-to-one correspondence with the first through holes 101d-1. A telescopic ring 203 is provided in the telescopic groove 101d, and locking columns 203a for slidingly engaging the first through holes 101d-1 and the second through holes 201b are fixed in an array on the bottom surface of the telescopic ring 203. A spring 203b is slidably sleeved in the telescopic groove 101d above the telescopic ring 203, and the spring 203b can realize automatic resetting of the telescopic ring 203.

[0051] When the above arrangement is in use, the locking column 203a is synchronously engaged between the coaxial first through hole 101d-1 and the second through hole 201b to realize the limiting of the sealing cover 201 by the locking column 203a, thereby avoiding the loosening of the sealing cover 201 due to rotation due to shaking during use; when removing the sealing cover 201, the staff can use a tool to insert it into the multiple second through holes 201b. Under the engagement of the tool, the telescopic ring 203 drives the locking column 203a to move upward in the telescopic groove 101d to realize the disengagement of the locking column 203a from the second through hole 201b. Finally, the staff can realize the rotation of the sealing cover 201 by rotating the tool. The tool can be designed with reference to the structural coordination of the telescopic ring 203 and the locking column 203a, and a structure that facilitates tool coordination can be set in the middle of the telescopic ring 203.

[0052] Furthermore, a positioning blind hole 201a is eccentrically opened on the bottom surface of the sealing cover 201, and a positioning column should also be designed on the tool, which fits in the positioning blind hole 201a, so that when the sealing cover 201 is rotated, the entire locking column 203a can be disengaged from the second through hole 201b.

[0053] Example 4

[0054] Reference Figure 3 、 Figure 4 、 Figure 7 、 Figure 8 and Figure 9 , which is the fourth embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that, in order to effectively remove debris in the oil storage structure, an adjustment mechanism 300 is proposed to change the flow rate of waste oil discharged from the oil storage structure.

[0055] Specifically, the adjustment mechanism 300 includes a storage tube 302 fixedly connected to the side wall of the outer casing 101, a piston rod 301 slidably sleeved in the storage tube 302, and an air bag ring 303 arranged below the fixing ring 103c; the outer wall of the air bag ring 303 is open and bonded to the inner wall of the threaded sleeve 103, and an air groove 103b is opened in the threaded sleeve 103 along the circumferential direction, and the interior of the air groove 103b and the air bag ring 303 is connected by a plurality of air holes 103b-1 opened in a circumferential array. The outer casing 101 is provided with a connecting groove 101c for connecting the air groove 103b and the storage tube 302. An I-shaped column 301a is coaxially slidably sleeved in the piston column 301. The end surface of the I-shaped column 301a away from the outer casing 101 is provided with a convex groove 301a-1 for clearance fit of one end of the second T-shaped rod 301b, so as to realize the limited rotation of the second T-shaped rod 301b, and the other end of the second T-shaped rod 301b is fixedly connected to the pressing piece 301b-1;

[0056] A second limiting ring 103d is fixedly connected to the inner wall of the threaded sleeve 103 below the airbag ring 303 along the circumferential direction, thereby limiting and guiding the airbag ring 303 when the airbag ring 303 is expanded and contracted;

[0057] The free end of the storage tube 302 is fixedly connected to an end cap 302a by screws, and the second T-shaped rod 301b is slidably sleeved in the end cap 302a to enable the removal and replacement of the piston column 301;

[0058] The communicating cavity formed by the airbag ring 303, the air groove 103b, the communicating groove 101c and the storage tube 302 is filled with gas or liquid. The gas may preferably be an inert gas, and the liquid may preferably be industrial oil.

[0059] When the above arrangement is in use, by pressing the pressing piece 301b-1, the second T-shaped rod 301b can drive the piston column 301 to move in the storage tube 302. The movement of the piston column 301 can realize the flow of gas or liquid in the connecting cavity. When the piston column 301 moves toward the side of the outer casing 101, the gas and liquid in the connecting cavity enter the airbag ring 303, and finally realize the expansion of the airbag ring 303. Through the limitation of the second limiting ring 103d, the expansion of the airbag ring 303 can realize the reduction of the inner diameter of the airbag ring 303, thereby changing the flow rate of the waste oil and effectively removing debris in the oil storage mechanism.

[0060] In addition, it should be noted that the components not described in detail herein are prior art.

[0061] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only several embodiments are described in detail in this disclosure, it should be readily understood by those having reference to this disclosure that, without departing substantially from the novel teachings and advantages of the subject matter described in this application, many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.). For example, the element shown as integrally formed can be made up of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be altered or changed. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to specific embodiments, but extends to the multiple modifications still falling within the scope of the appended claims.

[0062] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0063] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A modular quick-disassembly oil drain valve, characterized by: include, The valve housing (100) comprises an outer casing (101), an oil drain pipe (102) fixed on the side wall of the outer casing (101), and a threaded sleeve (103) coaxially fixed on the top surface of the outer casing (101), wherein a flow cavity (101e) in the outer casing (101) is communicated with the oil drain pipe (102) and the threaded sleeve (103), respectively; and The oil discharge mechanism (200) comprises a sealing cover (201) coaxially sleeved on the outer side of the lower end of the outer casing (101) and a valve core (202) with a clearance fit in the circulation cavity (101e); a first T-shaped rod (202a) is slidably sleeved on the bottom surface of the valve core (202); the lower end of the first T-shaped rod (202a) slides through the sealing cover (201) and is fixedly connected to the hexagonal block (202a-1); and the first T-shaped rod (202a) is screw-fitted with the sealing cover (201); an external thread (101f) is provided on the outer side wall of the lower end of the outer casing (101); and an internal thread (201c) for screw-fitting with the external thread (101f) is provided on the inner side wall of the sealing cover (201); The valve core (202) is formed integrally of a column and a semicircular body located above the column. When the lower end of the first T-shaped column is screwed together with the sealing cover (201), the valve core (202) is used to block the flow between the circulation cavity (101e) and the oil drain pipe (102).

2. A modular quick-disassembly oil drain valve according to claim 1, characterized in that: A fitting ring (101b) is fixedly sleeved on the outer side wall of the upper end of the outer protective tube (101), a sealing groove (101b-2) is provided on the top surface of the fitting ring (101b) along the circumferential direction, and a sealing ring (101b-1) is interference-fitted in the sealing groove (101b-2); A twisting block (101a) is fixedly sleeved on the outer side wall of the middle portion of the outer protective tube (101).

3. A modular quick-disassembly oil drain valve according to claim 2, characterized in that: A blocking cover (102a) is slidably sleeved on the free end of the oil drain pipe (102), and the side wall of the blocking cover (102a) is fixedly connected to a collar (102a-2) via a connecting belt (102a-1). The collar (102a-2) is slidably sleeved on the oil drain pipe (102), and a first limiting ring (102b) is fixedly sleeved on the outer side wall of the oil drain pipe (102) between the collar (102a-2) and the blocking cover (102a).

4. A modular quick-disassembly oil drain valve according to claim 1 or 3, characterized in that: A fixing ring (103c) with an L-shaped vertical cross-section is fixedly sleeved at the inner lower end of the threaded sleeve (103), and a filter pocket (103a) is coaxially arranged in the threaded sleeve (103) above the fixing ring (103c); The filter bag (103a) is a cylindrical structure with a closed upper end, and the top plate and side walls of the filter bag (103a) are both provided with filter holes (103a-1) in an array. The vertical cross-section of the top plate of the filter bag (103a) is in the shape of a circular arc. An extension ring (103a-2) is fixedly sleeved on the outer side wall of the lower end of the filter bag (103a), and the extension ring (103a-2) is fixedly connected to the horizontal plate of the fixing ring (103c) by screws.

5. The modular quick-disassembly oil drain valve according to claim 4, characterized in that: A telescopic groove (101d) is provided inside the lower end of the outer protective tube (101) along the circumferential direction, and a plurality of first through holes (101d-1) communicating with the telescopic groove (101d) are provided in an array along the circumferential direction on the bottom surface of the outer protective tube (101), and second through holes (201b) are provided on the sealing cover (201) in a one-to-one correspondence with the first through holes (101d-1); A telescopic ring (203) is provided in the telescopic groove (101d); locking columns (203a) for slidingly inserting the first through hole (101d-1) and the second through hole (201b) are fixedly arranged in an array on the bottom surface of the telescopic ring (203); and a spring (203b) is slidably sleeved in the telescopic groove (101d) above the telescopic ring (203).

6. The modular quick-disassembly oil drain valve according to claim 5, characterized in that: A positioning blind hole (201a) is eccentrically provided on the bottom surface of the sealing cover (201).

7. The modular quick-disassembly oil drain valve according to claim 5, characterized in that: The device also includes an adjustment mechanism (300), wherein the adjustment mechanism (300) includes a storage tube (302) fixedly connected to the side wall of the outer casing (101), a piston rod (301) slidably sleeved in the storage tube (302), and an air bag ring (303) arranged below the fixing ring (103c); The outer wall of the airbag ring (303) is open and bonded to the inner wall of the threaded sleeve (103); an air groove (103b) is circumferentially provided in the threaded sleeve (103); and the air groove (103b) and the interior of the airbag ring (303) are communicated through a plurality of air holes (103b-1) arranged in a circumferential array; and a connecting groove (101c) is provided in the outer casing (101) for communicating the air groove (103b) and the storage tube (302).

8. The modular quick-disassembly oil drain valve according to claim 7, characterized in that: A second limiting ring (103d) is fixedly connected to the inner wall of the threaded sleeve (103) below the airbag ring (303) along the circumferential direction; An I-shaped column (301a) is coaxially slidably sleeved in the piston column (301), and a convex groove (301a-1) for clearance fit of one end of a second T-shaped rod (301b) is provided on an end surface of the I-shaped column (301a) away from the outer casing (101), and a pressing piece (301b-1) is fixedly connected to the other end of the second T-shaped rod (301b); The free end of the storage tube (302) is fixedly connected to an end cover (302a) via screws, and the second T-shaped rod (301b) is slidably sleeved in the end cover (302a).

9. The modular quick-disassembly oil drain valve according to claim 7, characterized in that: The communicating cavity formed by the air bag ring (303), the air groove (103b), the communicating groove (101c) and the storage tube (302) is filled with gas or liquid.

Images