A water-sealed well for convenient liquid level display and waste oil extraction

Abstract

The present invention relates to the technical field of water seal wells, and specifically to a water seal well that is convenient for liquid level display and dirty oil extraction, comprising a water seal well body, a manhole cover installed on the water seal well body, a measuring mechanism installed on the manhole cover, an extraction mechanism installed on the measuring mechanism, a sealing mechanism connected to the measuring mechanism, a limiting mechanism connected to the measuring mechanism, a locking mechanism installed inside the manhole cover, and a resistance mechanism installed inside the manhole cover; the manhole cover facilitates sealing of the water seal well body, the measuring mechanism and the manhole cover are installed to facilitate water level measurement of the water seal well body, and oil is extracted through the extraction mechanism, the sealing mechanism facilitates sealing and opening of the extraction mechanism, the limiting mechanism facilitates fixing of the measuring mechanism, and oil extraction is convenient, the manhole cover and the water seal well body are locked and protected by the locking mechanism, and the resistance mechanism is fixed to the measuring mechanism by resistance through the closing of the manhole cover.

Description

Technical Field

[0001] The invention relates to the technical field of water seal wells, in particular to a water seal well that is convenient for liquid level display and waste oil extraction. Background Art

[0002] A water seal well is a safety liquid seal device installed in the oil depot area on the sewage pipe network with flammable gas, flammable liquid vapor or oil pollution to prevent combustion and explosion from spreading along the sewage pipe network. Its principle is to use the different density of the medium or the different pressure inside and outside the isolation area to achieve the purpose of isolation. It has two main functions. One is isolation and blocking to prevent the isolation medium from overflowing or external medium from mixing in, so as to prevent environmental pollution or fire and explosion. The second is to play a role of safety protection, which is equivalent to a safety valve.

[0003] However, the water seal height is the most important safety data of the water seal well. It is directly related to whether the water seal function is effective and is also an important item for daily inspection. When inspecting the water seal well, it is necessary to open the well cover and then measure the water height with a ruler. This is labor-intensive, cumbersome and not conducive to daily observation and inspection. At the same time, after the oily sewage from oil operations flows into the water seal well, an oil-water layer is formed in the well. Generally, the oily sewage is extracted by lifting the well cover, pumping with an oil pump and cleaning with oil suction felt. This method is labor-intensive and personnel are exposed to toxic and harmful gas spaces for a long time. The extracted dirty oil is easily mixed with sewage, which increases the difficulty and cost of subsequent harmless treatment. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a water seal well which is convenient for liquid level display and waste oil extraction.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a water seal well that is convenient for liquid level display and waste oil extraction, including a water seal well body, a well cover installed on the water seal well body, a measuring mechanism installed on the well cover, an extraction mechanism installed on the measuring mechanism, a sealing mechanism connected to the measuring mechanism, a limiting mechanism connected to the measuring mechanism, a locking mechanism installed inside the well cover, and a resistance mechanism installed inside the well cover.

[0006] Specifically, the measuring mechanism includes a base, which is fixedly connected to the bottom center of the water seal well body, a support rod is vertically connected to the base, a float is slidably connected to the support rod, a buoy is fixedly connected to the buoy, the buoy is slidably connected to the support rod, a fixed seat is connected to the center of the well cover through a rubber sleeve, the buoy is slidably connected to the inside of the fixed seat, the buoy extends to the outside of the fixed seat, and a plurality of scales are provided on the side wall of the buoy.

[0007] Specifically, the bottom of the support rod is vertically threadedly connected to the base, the bottom of the support rod is a "cross" shaped structure, and a leather pad is installed at the bottom of the support rod, and the leather pad is in conflict with the base.

[0008] Specifically, the extraction mechanism includes a guide groove, a plurality of guide grooves distributed in a ring shape are provided on the float, a conveying groove is provided on the inner side of the buoy, the guide groove is connected to the conveying groove, a connecting pipe is threadedly connected to one side of the top of the buoy, and one end of the connecting pipe is connected to the conveying groove.

[0009] Specifically, the sealing mechanism includes a leather plug, which is slidingly connected to the inner side of the top of the buoy, one end of the connecting tube is located on one side of the leather plug, and the conveying groove is located on the other side of the leather plug. A connecting rod is rotatably connected to the inside of the buoy, and the bottom of the connecting rod is threadedly connected to the inside of the leather plug. The connecting rod extends to the outside of the buoy, and a twist is installed on the connecting rod. The twist is slidably connected to the connecting rod through a telescopic spring, and the top of the connecting rod is a hexagonal "T"-shaped structure. A plurality of protrusions distributed in a ring are provided on the bottom side of the twist, and the protrusions are in contact with the inner side of the top of the buoy.

[0010] Specifically, the limiting mechanism includes a rubber block, which is slidably connected to the inner side of the top of the fixed seat. The rubber block is slidably connected to the inside of the fixed seat through a resistance spring. One end of the rubber block extends to the outside of the fixed seat. The side wall of the fixed seat is threadedly connected with a screw rod, which passes through the resistance spring and is rotatably connected to the rubber block.

[0011] Specifically, the locking mechanism includes a turning handle, and symmetrical turning handles are rotatably connected at both ends of the manhole cover, one side of the turning handle extends to the outside of the manhole cover, and symmetrical pins are installed inside the two ends of the manhole cover, and the pins are slidably connected to the inside of the manhole cover through extrusion springs. Symmetrical slots are provided on the top side of the water seal well body, and both the pins and the slots are "L"-shaped structures. The bottom of the pin is engaged with the inside of the slot, and a driving rod is vertically connected to one side of the top of the pin, and the driven rod is slidably connected to the inside of the manhole cover, and one end of the driving rod is an arc structure, and one end of the driving rod is in conflict with the inner side of one end of the turning handle.

[0012] Specifically, the resistance mechanism includes an extrusion rod, which is symmetrically installed inside the manhole cover and is slidably connected to the inside of the manhole cover through a return spring. One end of each of the two extrusion rods is provided with an extrusion block, which is in contact with the outside of a fixed seat. The other end of the extrusion rod is connected to a control rod through a buffer spring, and the control rod is slidably connected to the inside of the manhole cover. One end of the control rod is an arc structure, and one end of the control rod extends to the outside of the manhole cover and is in contact with the inside of the water seal well body.

[0013] The beneficial effects of the present invention are:

[0014] (1) The water seal well described in the present invention is convenient for liquid level display and waste oil extraction. The well cover is used to seal the water seal well body. The measuring mechanism and the well cover are installed to measure the water level inside the water seal well body. The oil is extracted by the extraction mechanism. That is, the base is used to vertically install the support rod, so that the buoy and the float can slide vertically smoothly. The buoy can slide with the change of water level under the action of the float. The scale on the buoy is used as a reference, and the fixed seat is used to measure the water level inside the water seal well body. The water level status can be obtained by the change. The threaded connection between the support rod and the base is convenient for the subsequent disassembly and maintenance of the support rod. The leather pad makes the support rod tightly contact with the base after installation and is not easy to loosen, so that the buoy and the float can slide smoothly and stably. The connecting pipe is convenient for connection with the external pipeline, so as to facilitate the docking with the external oil pump. The buoy floats inside the water seal well body, so that the oil on the water surface is located outside the buoy. The guide groove and the conveying groove are conducive to the oil on the water seal well body to be pumped out.

[0015] (2) The water seal well described in the present invention is convenient for liquid level display and waste oil extraction. The extraction mechanism is sealed and opened by the driving control of the sealing mechanism, which is beneficial to the oil extraction work. The measuring mechanism is fixed by the limiting mechanism, which is convenient and stable for the oil extraction work. That is, the connecting pipe is blocked by the action of the leather plug, so that the inside of the conveying groove remains sealed. When it is necessary to extract oil from the inside of the water seal well body, the knob is pulled and the knob slides away from the action of the telescopic spring, which is beneficial to the separation of the protrusion at the bottom of the knob and the buoy, which is convenient for the rotation of the knob. The knob drives the connecting rod to rotate, and the leather plug slides under the action of the thread, so that the connecting pipe is connected with the conveying groove, which is convenient for pumping oil from the water seal well body. When the water seal well body is being pumped, the screw is driven by the action of the thread to drive the rubber block, and the rubber block contacts the buoy with the assistance of the contact spring, so that the buoy cannot slide with the fixed seat, which is convenient for extracting the oil at the float position. With the assistance of the telescopic spring, the contact of the rubber block is stable and the screw is not easy to loosen.

[0016] (3) The water-sealed well of the present invention is convenient for liquid level display and waste oil extraction. The locking mechanism is conducive to the locking protection between the well cover and the water-sealed well body. The closing of the well cover makes the interference mechanism interfere with the measuring mechanism, so that the measuring mechanism is firmly installed. That is, the well cover is convenient to lift under the action of the turning handle, which is easy to operate and convenient to store. When the well cover and the water-sealed well body are closed, the latch is engaged with the slot under the action of the extrusion spring, so that the well cover and the water-sealed well body are locked and cannot be opened. When the turning handle is rotated, the turning handle is driven by the driving rod, and the driven rod drives the latch to slide, and the latch is separated from the slot, which is convenient for opening and closing the well cover. When the well cover and the water-sealed well body are closed, the control rod is slid by the interference, and the control rod drives the buffer spring to drive the extrusion rod. The extrusion rod is freed from the action of the reset spring and drives the extrusion block to interfere with the outer side of the fixed seat, so that the fixed seat is firmly installed on the well cover. After the extrusion block is tightly interfered by the buffer spring, the control rod can continue to slide, ensuring that the well cover is tightly closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of a water seal well provided by the present invention that facilitates liquid level display and waste oil extraction;

[0019] Figure 2 It is a schematic diagram of the connection structure between the manhole cover and the fixing seat of the present invention;

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of the structure of section A is shown;

[0021] Figure 4 for Figure 2 An enlarged schematic diagram of the structure of part B is shown;

[0022] Figure 5 for Figure 2 An enlarged schematic diagram of the C-section structure is shown;

[0023] Figure 6 for Figure 2 An enlarged schematic diagram of the D structure is shown.

[0024] In the figure: 1, water seal well body; 2, measuring mechanism; 201, buoy; 202, scale; 203, fixed seat; 204, float; 205, support rod; 206, rubber sleeve; 207, base; 208, leather pad; 3, extraction mechanism; 301, guide groove; 302, conveying groove; 303, connecting pipe; 4, sealing mechanism; 401, twist; 402, telescopic spring; 403, connecting rod; 404 , protrusion; 405, leather plug; 5, limiting mechanism; 501, screw; 502, resistance spring; 503, rubber block; 6, locking mechanism; 601, turning handle; 602, driving rod; 603, extrusion spring; 604, latch; 605, slot; 7, resistance mechanism; 701, extrusion block; 702, extrusion rod; 703, reset spring; 704, buffer spring; 705, control rod; 8, manhole cover. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] like Figure 1-Figure 6 As shown, a water seal well for facilitating liquid level display and waste oil extraction described in the present invention comprises a water seal well body 1, a well cover 8 is installed on the water seal well body 1, a measuring mechanism 2 is installed on the well cover 8, an extraction mechanism 3 is installed on the measuring mechanism 2, a sealing mechanism 4 is connected to the measuring mechanism 2, a limiting mechanism 5 is connected to the measuring mechanism 2, a locking mechanism 6 is installed inside the well cover 8, and a resistance mechanism 7 is installed inside the well cover 8.

[0027] Specifically, the measuring mechanism 2 includes a base 207, the base 207 is fixedly connected at the center of the bottom of the water seal well body 1, the base 207 is vertically connected to a support rod 205, the support rod 205 is slidably connected to a float 204, the float 204 is fixedly connected to a buoy 201, the buoy 201 is slidably connected to the support rod 205, the center of the well cover 8 is connected to a fixed seat 203 through a rubber sleeve 206, the buoy 201 is slidably connected to the inside of the fixed seat 203, and the buoy 201 extends To the outside of the fixed seat 203, the side wall of the buoy 201 is provided with a plurality of scales 202, and the base 207 facilitates the vertical installation of the support rod 205, so that the buoy 201 and the float 204 can slide vertically smoothly, and the buoy 201 can slide with the change of the water level under the action of the float 204, and the water level status can be obtained through the scale 202 on the buoy 201 and the fixed seat 203 as a reference through the change of the scale 202 on the buoy 201.

[0028] Specifically, the bottom of the support rod 205 is vertically threadedly connected to the base 207. The bottom of the support rod 205 is a "cross" shaped structure. A leather pad 208 is installed at the bottom of the support rod 205. The leather pad 208 is in contact with the base 207. The threaded connection between the support rod 205 and the base 207 facilitates the subsequent disassembly and maintenance of the support rod 205. Under the action of the leather pad 208, the support rod 205 is tightly in contact with the base 207 after installation and is not easy to loosen, so that the buoy 201 and the float 204 can slide smoothly and stably.

[0029] Specifically, the extraction mechanism 3 includes a guide groove 301, and a plurality of guide grooves 301 distributed in an annular shape are provided on the float 204. A conveying groove 302 is provided on the inner side of the buoy 201. The guide groove 301 is connected to the conveying groove 302. A connecting pipe 303 is threadedly connected to one side of the top of the buoy 201, and one end of the connecting pipe 303 is connected to the conveying groove 302. The connecting pipe 303 is convenient for connecting with an external pipeline, thereby facilitating docking with an external oil pump. The buoy 201 floats inside the water seal well body 1, so that the oil on the water surface is located outside the buoy 201. The guide groove 301 and the conveying groove 302 facilitate the oil on the water seal well body 1 to be extracted.

[0030] Specifically, the sealing mechanism 4 includes a leather plug 405, the leather plug 405 is slidably connected to the inner side of the top of the buoy 201, one end of the connecting pipe 303 is located on one side of the leather plug 405, and the conveying groove 302 is located on the other side of the leather plug 405. The buoy 201 is rotatably connected to a connecting rod 403 inside, the bottom of the connecting rod 403 is threadedly connected to the inside of the leather plug 405, and the connecting rod 403 extends to the outside of the buoy 201. A twist 401 is installed on the connecting rod 403, and the twist 401 is slidably connected to the connecting rod 403 through a telescopic spring 402. The top of the connecting rod 403 is a hexagonal "T"-shaped structure, and the bottom side of the twist 401 is provided with a plurality of protrusions 404 distributed in an annular shape. The protrusion 404 contacts the inner side of the top of the buoy 201, and the leather plug 405 helps to block the connecting pipe 303, so that the inside of the conveying groove 302 remains sealed. When it is necessary to pump oil from the inside of the water seal well body 1, by pulling the knob 401, the knob 401 slides under the action of the telescopic spring 402, which helps to separate the protrusion 404 at the bottom of the knob 401 from the buoy 201, facilitating the rotation of the knob 401. The knob 401 drives the connecting rod 403 to rotate, and the leather plug 405 slides under the action of the thread, so that the connecting pipe 303 is connected with the conveying groove 302, which facilitates the pumping of oil from the water seal well body 1.

[0031] Specifically, the limiting mechanism 5 includes a rubber block 503, which is slidably connected to the inner side of the top of the fixed seat 203, and the rubber block 503 is slidably connected to the inside of the fixed seat 203 through a resistance spring 502. One end of the rubber block 503 extends to the outside of the fixed seat 203, and a screw 501 is threadedly connected to the side wall of the fixed seat 203. The screw 501 penetrates the resistance spring 502 and is rotatably connected to the rubber block 503. When pumping oil from the water seal well body 1, the screw 501 is rotated, and the screw 501 drives the rubber block 503 under the action of the thread. The rubber block 503 resists the buoy 201 with the assistance of the resistance spring 502, so that the buoy 201 cannot slide with the fixed seat 203, which facilitates the extraction of oil at the position of the float 204. With the assistance of the telescopic spring 402, the resistance of the rubber block 503 is stable, and the screw 501 is not easy to loosen.

[0032] Specifically, the locking mechanism 6 includes a turning handle 601, and the two ends of the manhole cover 8 are rotatably connected with symmetrical turning handles 601, one side of the turning handle 601 extends to the outside of the manhole cover 8, and symmetrical bayonet pins 604 are installed inside the two ends of the manhole cover 8, and the bayonet pins 604 are slidably connected to the inside of the manhole cover 8 through an extrusion spring 603. A symmetrical slot 605 is provided on the top side of the water seal well body 1, and the bayonet pin 604 and the slot 605 are both "L"-shaped structures. The bottom of the bayonet pin 604 is engaged with the inside of the slot 605, and a driving rod 602 is vertically connected to one side of the top of the bayonet pin 604, and the driving rod 602 is slidably connected to the inside of the manhole cover 8, and one end of the driving rod 602 is an arc-shaped structure. One end of the driving rod 602 is in contact with the inner side of one end of the turning handle 601, and the turning handle 601 is used to lift the manhole cover 8, which is easy to operate and convenient to store. By closing the manhole cover 8 and the water seal well body 1, the latch 604 is engaged with the slot 605 under the action of the extrusion spring 603, so that the manhole cover 8 and the water seal well body 1 are locked and cannot be opened. By rotating the turning handle 601, the turning handle 601 is driven to contact the driving rod 602, and the driving rod 602 drives the latch 604 to slide, and the latch 604 is separated from the slot 605, which facilitates the opening and closing of the manhole cover 8.

[0033] Specifically, the abutment mechanism 7 includes an extrusion rod 702, which is symmetrically installed inside the manhole cover 8. The extrusion rod 702 is slidably connected to the inside of the manhole cover 8 through a reset spring 703. One end of the two extrusion rods 702 is respectively installed with an extrusion block 701, and the extrusion block 701 abuts against the outside of the fixing seat 203. The other end of the extrusion rod 702 is connected to a control rod 705 through a buffer spring 704. The control rod 705 is slidably connected to the inside of the manhole cover 8. One end of the control rod 705 is an arc structure, and one end of the control rod 705 extends to the outside of the manhole cover 8 and contacts the water seal. The inner side of the well body 1 is in contact, and through the closure of the well cover 8 and the water seal well body 1, the control rod 705 is in contact and slides, and the control rod 705 drives the buffer spring 704 to drive the extrusion rod 702. The extrusion rod 702 is freed from the action of the reset spring 703 and drives the extrusion block 701 to contact the outer side of the fixed seat 203, so that the fixed seat 203 is firmly installed on the well cover 8. After the extrusion block 701 is tightly in contact under the action of the buffer spring 704, the control rod 705 can continue to slide, ensuring that the well cover 8 is tightly closed.

[0034] When the present invention is in use, firstly, the base 207 is used to facilitate the vertical installation of the support rod 205, so that the buoy 201 and the buoy 204 can slide vertically smoothly, and the buoy 201 can slide with the change of the water level under the action of the buoy 204. Through the scale 202 on the buoy 201, the fixed seat 203 is used as a reference, and the water level state is obtained through the change of the scale 202 on the buoy 201. The threaded connection between the support rod 205 and the base 207 is conducive to the subsequent disassembly and maintenance of the support rod 205. Through the action of the leather pad 208, the support rod 205 is tightly in contact with the base 207 after installation, and it is not easy to cause looseness, so that the buoy 201 and the buoy 204 can slide smoothly and stably. Through the action of the connecting pipe 303, it is advantageous The buoy 201 is used to connect with the external pipeline, so as to facilitate the docking with the external oil pumping unit. The buoy 201 floats inside the water seal well body 1, so that the oil on the water surface is located outside the buoy 201. The oil on the water seal well body 1 can be pumped out through the action of the guide groove 301 and the conveying groove 302. The plug 405 is used to block the connecting pipe 303, so that the inside of the conveying groove 302 remains sealed. When it is necessary to pump oil from the inside of the water seal well body 1, the knob 401 is pulled, and the knob 401 slides under the action of the telescopic spring 402, which is conducive to the separation of the protrusion 404 at the bottom of the knob 401 from the buoy 201, making it convenient for the knob 401 to rotate. The knob 401 drives the connecting rod 403 to rotate, and the plug 405 slides under the action of the thread, so that the connecting rod 403 can be pumped out. The pipe 303 is connected with the conveying groove 302, which is convenient for pumping oil from the water seal well body 1. When pumping oil from the water seal well body 1, by rotating the screw 501, the screw 501 drives the rubber block 503 under the action of the thread, and the rubber block 503 resists the buoy 201 with the assistance of the resistance spring 502, so that the buoy 201 cannot slide with the fixed seat 203, which is convenient for extracting oil from the position of the float 204. With the assistance of the telescopic spring 402, the resistance of the rubber block 503 is stable, and the screw 501 is not easy to loosen. It is convenient to lift the well cover 8 through the action of the turning handle 601, which is easy to operate and convenient to store the turning handle 601. Through the closing of the well cover 8 and the water seal well body 1, the latch 604 is in contact with the slot 60 under the action of the extrusion spring 603. 5 is engaged, so that the manhole cover 8 is locked with the water seal well body 1 and cannot be opened. By rotating the turning handle 601, the turning handle 601 contacts and drives the driving rod 602, and the driven rod 602 drives the latch 604 to slide, and the latch 604 is separated from the slot 605, which is convenient for the opening and closing of the manhole cover 8. Through the closing of the manhole cover 8 and the water seal well body 1, the control rod 705 is contacted and slid, and the control rod 705 drives the buffer spring 704 to drive the squeezing rod 702. The squeezing rod 702 is freed from the action of the reset spring 703 and drives the squeezing block 701 to contact the outer side of the fixing seat 203, so that the fixing seat 203 is firmly installed on the manhole cover 8. After the squeezing block 701 contacts tightly under the action of the buffer spring 704, the control rod 705 can continue to slide, ensuring that the manhole cover 8 is tightly closed.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A water seal well that is convenient for liquid level display and waste oil extraction, characterized in that: The water seal well body (1) comprises a well cover (8) installed on the water seal well body (1), a measuring mechanism (2) installed on the well cover (8), an extraction mechanism (3) installed on the measuring mechanism (2), a sealing mechanism (4) connected to the measuring mechanism (2), a limit mechanism (5) connected to the measuring mechanism (2), a locking mechanism (6) installed inside the well cover (8), and a resistance mechanism (7) installed inside the well cover (8); The measuring mechanism (2) comprises a base (207), the base (207) is fixedly connected to the center of the bottom of the water seal well body (1), a support rod (205) is vertically connected to the base (207), a float (204) is slidably connected to the support rod (205), a buoy (201) is fixedly connected to the float (204), the buoy (201) is slidably connected to the support rod (205), a fixed base (203) is slidably connected to the center of the well cover (8) via a rubber sleeve (206), the buoy (201) is slidably connected to the inside of the fixed base (203), the buoy (201) is slidably connected to the inside of the fixed base (203), the buoy (201) extends to the outside of the fixed base (203), and a plurality of scales (202) are provided on the side wall of the buoy (201); The bottom of the support rod (205) is vertically threadedly connected to the base (207); the bottom of the support rod (205) is a "cross"-shaped structure; a leather pad (208) is installed at the bottom of the support rod (205), and the leather pad (208) is in conflict with the base (207); The extraction mechanism (3) comprises a guide groove (301), the buoy (204) is provided with a plurality of guide grooves (301) distributed in an annular shape, a conveying groove (302) is provided inside the buoy (201), the guide groove (301) is communicated with the conveying groove (302), a connecting pipe (303) is threadedly connected to one side of the top of the buoy (201), and one end of the connecting pipe (303) is connected to the conveying groove (302); The sealing mechanism (4) comprises a leather plug (405), the leather plug (405) is slidably connected to the inner side of the top of the buoy (201), one end of the connecting pipe (303) is located on one side of the leather plug (405), and the conveying groove (302) is located on the other side of the leather plug (405), and the buoy (201) is rotatably connected to a connecting rod (403) inside, the bottom of the connecting rod (403) is threadedly connected to the inside of the leather plug (405), and the connecting rod (403) extends to the outside of the buoy (201); A twist knob (401) is mounted on the connecting rod (403), and the twist knob (401) is slidably connected to the connecting rod (403) via a telescopic spring (402). The top of the connecting rod (403) is a hexagonal "T"-shaped structure, and a plurality of protrusions (404) distributed in a ring shape are arranged on the bottom side of the twist knob (401), and the protrusions (404) are in contact with the inner side of the top of the buoy (201); The limiting mechanism (5) comprises a rubber block (503), the inner side of the top of the fixing seat (203) is slidably connected to the rubber block (503), the rubber block (503) is slidably connected to the inside of the fixing seat (203) via a resistance spring (502), one end of the rubber block (503) extends to the outside of the fixing seat (203), a screw rod (501) is threadedly connected to the side wall of the fixing seat (203), and the screw rod (501) passes through the resistance spring (502) and is rotatably connected to the rubber block (503).

2. A water seal well for facilitating liquid level display and waste oil extraction according to claim 1, characterized in that: The locking mechanism (6) comprises a turning handle (601), and both ends of the manhole cover (8) are rotatably connected to symmetrical turning handles (601), and one side of the turning handle (601) extends to the outside of the manhole cover (8).

3. A water seal well for facilitating liquid level display and waste oil extraction according to claim 2, characterized in that: Symmetrical latches (604) are installed inside the two ends of the manhole cover (8), and the latches (604) are slidably connected to the inside of the manhole cover (8) through a compression spring (603). A symmetrical latching groove (605) is provided on the top side of the water seal well body (1). Both the latches (604) and the latching groove (605) are "L"-shaped structures. The bottom of the latches (604) is engaged with the inside of the latching groove (605). A driving rod (602) is vertically connected to one side of the top of the latches (604). The driving rod (602) is slidably connected to the inside of the manhole cover (8). One end of the driving rod (602) is an arc-shaped structure, and one end of the driving rod (602) contacts the inner side of one end of the turning handle (601).

4. A water seal well for facilitating liquid level display and waste oil extraction according to claim 1, characterized in that: The abutment mechanism (7) comprises extrusion rods (702), the manhole cover (8) is symmetrically installed with the extrusion rods (702), the extrusion rods (702) are slidably connected to the inside of the manhole cover (8) via a return spring (703), one end of each of the two extrusion rods (702) is respectively installed with an extrusion block (701), the extrusion block (701) abuts against the outside of a fixing seat (203), the other end of the extrusion rod (702) is connected to a control rod (705) via a buffer spring (704), the control rod (705) is slidably connected to the inside of the manhole cover (8), one end of the control rod (705) is an arc-shaped structure, and one end of the control rod (705) extends to the outside of the manhole cover (8) to abut against the inside of a water seal well body (1).

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