Pipe joint for sewage treatment tank, sewage treatment tank and working method thereof

Abstract

The present application belongs to the technical field of pipe joints, and particularly relates to a pipe joint for a sewage treatment tank, and more particularly to a pipe joint for a sewage treatment tank, a sewage treatment tank and a working method thereof. The pipe joint for the sewage treatment tank is provided with a gate valve on the pipe joint body and a gas passage along the liquid passage flow direction on the inner wall of the pipe joint body, so that the gate valve can be switched between the open state, the first closed state and the second closed state. After the pressurized stirring is completed, the gate valve is switched to the second closed state, the gas passage is opened alone while the liquid passage is kept closed, and the high-pressure gas in the tank is released. After the pressure in the tank is reduced to a safe level, the drain pipe is opened for drainage, thereby avoiding the problems of sewage gushing and flow out of control caused by direct discharge of high pressure. Meanwhile, the tank body does not need to be modified, and only the existing pipe joint of the tank body needs to be replaced, so that the pressure in the tank can be released.

Description

Technical Field

[0001] This invention belongs to the field of pipe fitting technology, specifically relating to a pipe fitting for a sewage treatment tank, and more particularly to a pipe fitting for a sewage treatment tank, a sewage treatment tank, and a method for operating the same. Background Technology

[0002] In wastewater treatment processes, it is often necessary to stir the wastewater inside the tank to promote thorough mixing of the wastewater with various treatment agents and improve treatment efficiency.

[0003] In related technologies, the introduction of numerous air bubbles during wastewater agitation can lead to uneven chemical dispersion and negatively impact wastewater treatment efficiency. To avoid this, pressurized agitation is employed, injecting pressurized gas into the tank under sealed conditions to enhance convection and mass transfer within the liquid, thereby improving the uniformity of chemical mixing to some extent. However, pressurized agitation introduces new technical challenges: when wastewater discharge is required after agitation, the tank maintains a high pressure. Directly opening a conventional drain valve causes the high-pressure gas to propel the wastewater out at an excessively rapid rate, making it difficult to control the discharge flow and potentially impacting downstream pipelines and equipment.

[0004] Therefore, how to reduce air bubbles by using high-pressure stirring while avoiding the increase in wastewater discharge speed caused by high-pressure gas is a technical problem that urgently needs to be solved.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one pipe fitting for a sewage treatment tank, a sewage treatment tank, and a method for operating the same.

[0007] In a first aspect, embodiments of this disclosure provide a pipe fitting for a wastewater treatment tank, comprising: Pipe fitting body; A gate valve is provided on the pipe joint body; The inner wall of the pipe fitting body is provided with a gas channel along the flow direction of the liquid channel of the pipe fitting body. When the gate valve is in the open position, the liquid passage is opened; When the gate valve is in the first closed state, both the liquid passage and the gas passage are closed, which facilitates pressurization of the sewage treatment tank; When the gate valve is in the second closed state, it closes the liquid passage and opens the gas passage to depressurize the sewage treatment tank.

[0008] In one alternative embodiment, the gate valve includes: Valve seat, which has a valve cavity inside; A valve plate, which is slidably disposed within the valve cavity; The bottom surface of the valve plate is provided with a blocking block radially toward the gas passage; The blocking block has an air venting channel.

[0009] In an optional embodiment, when the valve plate is in the first closed state, the valve plate closes the liquid channel, and the venting channel of the valve plate's blocking block is misaligned with the gas channel to close both gas channels, thereby facilitating pressurization of the sewage treatment tank. When the gate valve is in the second closed state, the valve plate closes the liquid passage, and the blocking block of the valve plate abuts against the inner wall of the liquid passage to connect the venting passage with the gas passage and open the gas passage to depressurize the sewage treatment tank.

[0010] In one optional embodiment, a vent hole is provided at the bottom of the valve seat; A trigger element is slidably disposed inside the vent hole; When the valve plate is in the second closed state, the blocking block presses the trigger to open the vent hole, so that the vent hole is connected to the venting channel.

[0011] In one optional embodiment, the vent is prismatic, and one of the sidewalls of the vent has a receiving groove. The trigger element is elastically disposed within the receiving groove by a reset spring; The receiving groove is provided with an inclined sliding groove; The trigger element is slidably connected to the inclined groove via a slider; When the gate valve is in the second closed state, the blocking block of the valve plate abuts against the inner wall of the liquid channel, so that the trigger element is pushed down along the inclined slide groove by the blocking block to open the vent hole; When the gate valve exits the second closed state, the trigger retracts under the action of the reset spring to close the vent.

[0012] In one alternative embodiment, the trigger includes: A plunger, which is slidably disposed within the receiving groove; A trigger plate extends upward from the top surface of the plunger; The trigger plate and the plunger are integrally formed.

[0013] Secondly, embodiments of this disclosure also provide a wastewater treatment tank, comprising: The tank body has a drain pipe at its bottom; The pipe fittings for the wastewater treatment tanks described above are located at the upper end of the tank body; Furthermore, the water inlet direction of the pipe fitting body is offset from the axis of the tank body.

[0014] In one alternative embodiment, a pressure pipe is provided at the top of the tank body; The tank body is also equipped with a stirring mechanism for stirring the sewage inside the tank body.

[0015] Thirdly, this disclosure also provides a method for operating a wastewater treatment tank as described above, the method comprising: The gate valve is in the open position, opening the liquid passage; Wastewater is fed into the tank body through the pipe fitting body; The gate valve is in the first closed state, closing both the liquid and gas passages. After the sewage inside the tank is pressurized through a pressurization pipe, the sewage is stirred and mixed by a stirring mechanism. After mixing is complete, the gate valve is in the second closed state, closing the liquid passage and opening the gas passage to depressurize the wastewater treatment tank; After the pressure is released, the mixed wastewater is discharged through the drain pipe at the bottom of the tank.

[0016] In one alternative embodiment, the gate valve includes: Valve seat, which has a valve cavity inside; A valve plate, which is slidably disposed within the valve cavity; The bottom surface of the valve plate is provided with a blocking block radially toward the gas passage; The blocking block has an air venting channel.

[0017] The beneficial effects of this invention are that the sewage treatment tank pipe connector, sewage treatment tank, and its working method are achieved by setting a gate valve on the pipe connector body and setting a gas channel along the liquid flow direction on the inner wall of the pipe connector body, so that the gate valve can switch between an open state, a first closed state, and a second closed state. After pressurization and stirring are completed, by switching the gate valve to the second closed state, the gas channel can be opened separately while keeping the liquid channel closed, so as to release the high-pressure gas in the tank. After the pressure in the tank drops to a safe level, the drain pipe is opened to drain the water, thereby avoiding the sewage gushing and flow control problems caused by direct discharge of high pressure. At the same time, there is no need to modify the tank body. Only the existing pipe connector of the tank body needs to be replaced to release the pressure in the tank.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A cross-sectional view of a pipe fitting for a wastewater treatment tank provided in an embodiment of this disclosure; Figure 2 This is a cross-sectional view of a portion of the structure of a pipe fitting for a wastewater treatment tank provided in an embodiment of this disclosure; Figure 3 A cross-sectional view of a wastewater treatment tank provided in an embodiment of this disclosure; Figure 4 A cross-sectional view of a portion of the structure of a wastewater treatment tank provided in an embodiment of this disclosure; Figure 5 A flowchart illustrating the operation method of the wastewater treatment tank provided in this embodiment of the disclosure; Figure 6 This is a schematic diagram showing the state of the valve plate and the trigger member when they are in contact, according to an embodiment of this disclosure. Figure 7 A schematic diagram of the state of the pipe joint for the sewage treatment tank provided in the second closed state according to an embodiment of this disclosure; Figure 8 A schematic diagram of the state of the pipe joint for the sewage treatment tank provided in the first closed state according to an embodiment of this disclosure.

[0022] In the diagram: 100, pipe fitting body; 110, liquid passage; 120, gas passage; 200, gate valve; 210, valve seat; 211, vent hole; 212, trigger element; 2121, plug; 2122, trigger plate; 213, receiving groove; 214, inclined slide; 220, valve plate; 221, blocking block; 222, venting passage; 300, tank body; 310, drain pipe; 320, pressurizing pipe; 330, stirring mechanism. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0026] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0027] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0028] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0029] Research has shown that stirring wastewater can easily introduce a large number of air bubbles, leading to uneven dispersion of the chemicals and affecting the wastewater treatment effect. To avoid this problem, pressurized stirring is used, injecting pressurized gas into the tank under sealed conditions to enhance convection and mass transfer within the liquid, thereby improving the uniformity of the chemical mixture to some extent. However, pressurized stirring introduces new technical problems: when wastewater is discharged after stirring, the tank still maintains a high pressure. If a conventional drain valve is opened directly, the high-pressure gas will propel the wastewater out at an excessively high speed, making it difficult to control the discharge flow and potentially causing impact on downstream pipelines and equipment.

[0030] Based on the above research, this disclosure provides a pipe connector for a sewage treatment tank, a sewage treatment tank, and its operating method. By setting a gate valve 200 on the pipe connector body 100 and setting a gas channel 120 along the liquid channel 110 flow direction on the inner wall of the pipe connector body 100, the gate valve 200 can switch between an open state, a first closed state, and a second closed state. After pressurization and stirring are completed, by switching the gate valve 200 to the second closed state, the gas channel 120 can be opened separately while keeping the liquid channel 110 closed, so as to release the high-pressure gas in the tank. After the pressure in the tank drops to a safe level, the drain pipe 310 is opened to drain the water, thereby avoiding the sewage gushing and flow control problems caused by direct discharge of high pressure. At the same time, there is no need to modify the tank body 300. Only the existing pipe connector of the tank body 300 needs to be replaced to release the pressure in the tank.

[0031] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] Please see Figure 1 and Figure 2 At least one embodiment provides a pipe connector for a wastewater treatment tank, comprising: a connector body 100; a gate valve 200 disposed on the connector body 100; a gas passage 120 disposed on the inner wall of the connector body 100 along the flow direction of the liquid passage 110 of the connector body 100; when the gate valve 200 is in the open state, the liquid passage 110 is opened; when the gate valve 200 is in the first closed state, both the liquid passage 110 and the gas passage 120 are closed to facilitate pressurization of the wastewater treatment tank; when the gate valve 200 is in the second closed state, the liquid passage 110 is closed and the gas passage 120 is opened to depressurize the wastewater treatment tank.

[0035] By installing a gate valve 200 on the pipe connector body 100 and a gas channel 120 along the liquid channel 110 flow direction on the inner wall of the pipe connector body 100, the gate valve 200 can switch between an open state, a first closed state, and a second closed state. After pressurization and stirring are completed, by switching the gate valve 200 to the second closed state, the gas channel 120 can be opened separately while keeping the liquid channel 110 closed, so as to release the high-pressure gas in the tank. After the pressure in the tank drops to a safe level, the drain pipe 310 is opened to drain the water, thereby avoiding the problems of sewage gushing and flow runaway caused by direct discharge of high pressure. At the same time, there is no need to modify the tank body 300. Only the existing pipe connectors of the tank body 300 need to be replaced to release the pressure in the tank.

[0036] Please continue reading. Figure 1 and Figure 2 The gate valve 200 includes: a valve seat 210, which has a valve cavity inside; a valve plate 220, which is slidably disposed in the valve cavity; a blocking block 221 is provided on the bottom surface of the valve plate 220 radially toward the gas passage 120; and a venting passage 222 is provided on the blocking block 221.

[0037] The state switching is achieved by the sliding of the valve plate 220 in the valve cavity, so that the valve plate 220 can simultaneously control the opening and closing of the liquid channel 110 and the gas channel 120 during the movement. There is no need to re-establish the pressure relief structure on the tank body 300. The pressure inside the tank can be released simply by replacing the existing pipeline joints of the tank body 300.

[0038] Specifically, when the valve plate 220 is in the first closed state, the valve plate 220 closes the liquid channel 110. The venting channel 222 of the blocking block 221 of the valve plate 220 is offset from the gas channel 120 to close the gas channel 120, which facilitates pressurization of the sewage treatment tank. When the gate valve 200 is in the second closed state, the valve plate 220 closes the liquid channel 110. The blocking block 221 of the valve plate 220 abuts against the inner wall of the liquid channel 110 to connect the venting channel 222 with the gas channel 120 and open the gas channel 120 to depressurize the sewage treatment tank.

[0039] In the first closed state, the venting channel 222 of the blocking block 221 is misaligned with the gas channel 120, ensuring that the gas channel 120 is reliably sealed, thereby ensuring the stability of the pressure inside the tank during the pressurization and stirring process and avoiding gas leakage from affecting the pressurization effect; in the second closed state, the blocking block 221 abuts against the inner wall of the liquid channel 110, so that the venting channel 222 and the gas channel 120 are precisely connected, realizing the function of only venting pressure without discharging liquid.

[0040] The valve seat 210 has a vent hole 211 at its bottom; a trigger 212 is slidably disposed in the vent hole 211; when the valve plate 220 is in the second closed state, the blocking block 221 squeezes the trigger 212 to open the vent hole 211 and make the vent hole 211 communicate with the venting channel 222.

[0041] The schematic diagram of the state when the blocking block 221 and the trigger 212 are in contact is shown below. Figure 6 As shown.

[0042] The opening and closing of the venting channel 222 is achieved by driving the trigger element 212 through the opening and closing of the valve plate 220, without the need for additional driving components, thus simplifying the operation process.

[0043] Please continue reading. Figure 1 and Figure 2 The vent 211 is prismatic, and one side wall of the vent 211 has a receiving groove 213; the trigger 212 is elastically disposed in the receiving groove 213 by a return spring; wherein, the receiving groove 213 has an inclined sliding groove 214; the trigger 212 is slidably connected to the inclined sliding groove 214 by a slider; when the gate valve 200 is in the second closed state, such as Figure 7 As shown, the blocking block 221 of the valve plate 220 abuts against the inner wall of the liquid channel 110, so that the trigger 212 is pushed downward along the inclined slide groove 214 by the blocking block 221 to open the vent 211; when the gate valve 200 exits from the second closed state, the valve plate 220 moves along the... Figure 8 When F1 moves in the opposite direction, the trigger 212 retracts under the action of the reset spring (retraction direction as shown in the figure). Figure 8 (As shown in F2), to close the vent 211.

[0044] Specifically, the trigger 212 includes: a plunger 2121, which is slidably disposed in the receiving groove 213; a trigger plate 2122 extending upward from the top surface of the plunger 2121; the trigger plate 2122 and the plunger 2121 are integrally formed.

[0045] When the valve plate 220 descends, the blocking block 221 pushes the trigger plate 2122 to slide down along the inclined slide groove 214, thereby causing the plug 2121 to slide into the receiving groove 213 and open the vent 211. After the blocking block 221 releases its resistance to the trigger plate 2122, the trigger plate 2122, under the action of the return spring, drives the plug 2121 to retract along the inclined slide groove 214 to close the vent 211.

[0046] Please see Figure 3 and Figure 4 At least one embodiment provides a sewage treatment tank, including: a tank body 300, with a drain pipe 310 disposed at its bottom; a sewage treatment tank pipe connector as described above, disposed at the upper end of the tank body 300; and the water inlet direction of the pipe connector body 100 is offset from the axis of the tank body 300.

[0047] By installing a gate valve 200 on the pipe connector body 100 and a gas channel 120 along the liquid channel 110 flow direction on the inner wall of the pipe connector body 100, the gate valve 200 can switch between an open state, a first closed state, and a second closed state. After pressurization and stirring are completed, by switching the gate valve 200 to the second closed state, the gas channel 120 can be opened separately while keeping the liquid channel 110 closed, so as to release the high-pressure gas in the tank. After the pressure in the tank drops to a safe level, the drain pipe 310 is opened to drain the water, thereby avoiding the problems of sewage gushing and flow runaway caused by direct discharge of high pressure. At the same time, there is no need to modify the tank body 300. Only the existing pipe connectors of the tank body 300 need to be replaced to release the pressure in the tank.

[0048] It should be noted that, in order to reduce the amount of bubbles generated during stirring, a pressure pipe 320 is provided on the top of the tank body 300; a stirring mechanism 330 is also provided inside the tank body 300 for stirring the sewage inside the tank body 300.

[0049] Thirdly, this disclosure also provides a working method for a wastewater treatment tank as described above. By setting a gate valve 200 on the pipe connector body 100 and setting a gas channel 120 along the liquid channel 110 flow direction on the inner wall of the pipe connector body 100, the gate valve 200 can switch between an open state, a first closed state, and a second closed state. After pressurization and stirring are completed, by switching the gate valve 200 to the second closed state, the gas channel 120 can be opened separately while keeping the liquid channel 110 closed, thereby releasing the high-pressure gas in the tank. After the pressure in the tank drops to a safe level, the drain pipe 310 is opened to drain the water, thereby avoiding the problems of sewage gushing and flow runaway caused by direct discharge of high pressure. At the same time, there is no need to modify the tank body 300; only the existing pipe connectors of the tank body 300 need to be replaced to release the pressure in the tank.

[0050] Specifically, the working method includes: S110: Gate valve 200 is in the open state, opening the liquid passage 110; S120: Sewage is sent into the tank body 300 through the pipe connector body 100; S130: Gate valve 200 is in the first closed state, closing both liquid passage 110 and gas passage 120; S140: After pressurizing the sewage in the tank body 300 through the pressurization pipe 320, the sewage is stirred and mixed by the stirring mechanism 330; S150: After mixing is complete, the gate valve 200 is in the second closed state, closing the liquid passage 110 and opening the gas passage 120 to depressurize the sewage treatment tank. S160: After the pressure is released, the mixed wastewater is discharged through the drain pipe 310 at the bottom of the tank body 300.

[0051] In summary, this invention provides a pipe connector for a sewage treatment tank, a sewage treatment tank, and its operating method. By setting a gate valve 200 on the pipe connector body 100 and setting a gas channel 120 along the liquid channel 110 flow direction on the inner wall of the pipe connector body 100, the gate valve 200 can switch between an open state, a first closed state, and a second closed state. After pressurization and stirring are completed, by switching the gate valve 200 to the second closed state, the gas channel 120 can be opened separately while keeping the liquid channel 110 closed, thereby releasing the high-pressure gas in the tank. After the pressure in the tank drops to a safe level, the drain pipe 310 is opened to drain the water, thus avoiding the sewage gushing and flow control problems caused by direct discharge of high pressure. At the same time, there is no need to modify the tank body 300; only the existing pipe connector of the tank body 300 needs to be replaced to release the pressure in the tank.

[0052] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0053] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0054] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0055] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0056] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A pipe fitting for a sewage treatment tank, characterized in that, include: Pipe fitting body (100); A gate valve (200) is provided on the pipe fitting body (100). The inner wall of the pipe connector body (100) is provided with a gas channel (120) along the flow direction of the liquid channel (110) of the pipe connector body (100). When the gate valve (200) is in the open state, the liquid passage (110) is opened; When the gate valve (200) is in the first closed state, both the liquid passage (110) and the gas passage (120) are closed, which facilitates pressurization of the sewage treatment tank; When the gate valve (200) is in the second closed state, it closes the liquid passage (110) and opens the gas passage (120) to depressurize the sewage treatment tank; The gate valve (200) includes: Valve seat (210), which has a valve cavity inside; Valve plate (220), which is slidably disposed within the valve cavity; The bottom surface of the valve plate (220) is provided with a blocking block (221) radially toward the gas passage (120). The blocking block (221) is provided with a venting channel (222); When the valve plate (220) is in the first closed state, the valve plate (220) closes the liquid channel (110). The venting channel (222) of the blocking block (221) of the valve plate (220) is misaligned with the gas channel (120) to close the gas channel (120), which facilitates the pressurization of the sewage treatment tank. When the gate valve (200) is in the second closed state, the valve plate (220) closes the liquid passage (110), and the blocking block (221) of the valve plate (220) abuts against the inner wall of the liquid passage (110) so that the venting passage (222) communicates with the gas passage (120) and opens the gas passage (120) to depressurize the sewage treatment tank; The bottom of the valve seat (210) is provided with a vent hole (211). A trigger (212) is slidably disposed inside the vent (211); When the valve plate (220) is in the second closed state, the blocking block (221) presses the trigger (212) to open the vent (211) and make the vent (211) communicate with the vent passage (222); The vent (211) is prismatic, and one of the side walls of the vent (211) is provided with a receiving groove (213). The trigger (212) is elastically disposed in the receiving groove (213) by a reset spring; The receiving groove (213) is provided with an inclined sliding groove (214). The trigger (212) is slidably connected to the inclined groove (214) via a slider; When the gate valve (200) is in the second closed state, the blocking block (221) of the valve plate (220) abuts against the inner wall of the liquid channel (110) so that the trigger (212) is pushed down along the inclined slide groove (214) by the blocking block (221) to open the vent (211); When the gate valve (200) exits from the second closed state, the trigger (212) retracts under the action of the reset spring to close the vent (211).

2. The pipe fitting for a sewage treatment tank as described in claim 1, characterized in that, The trigger (212) includes: A plunger (2121) is slidably disposed within the receiving groove (213); The top surface of the plunger (2121) extends upward to form a trigger plate (2122). The trigger plate (2122) and the plunger (2121) are integrally formed.

3. A sewage treatment tank, characterized in that, include: The tank body (300) has a drain pipe (310) at its bottom. The pipe fitting for the wastewater treatment tank as described in claim 1 is disposed at the upper end of the tank body (300); Furthermore, the water inlet direction of the pipe fitting body (100) is offset from the axis of the tank body (300).

4. The wastewater treatment tank as described in claim 3, characterized in that, A pressure pipe (320) is provided on the top of the tank body (300). The tank body (300) is also equipped with a stirring mechanism (330) for stirring the sewage inside the tank body (300).

5. A method for operating a wastewater treatment tank as described in claim 4, characterized in that, The working method includes: The gate valve (200) is in the open position, opening the liquid passage (110); Wastewater is fed into the tank body (300) through the pipe fitting body (100); The gate valve (200) is in the first closed state, closing both the liquid passage (110) and the gas passage (120); After the sewage in the tank body (300) is pressurized by the pressurization pipe (320), the sewage is stirred and mixed by the stirring mechanism (330); After mixing is complete, the gate valve (200) is in the second closed state, closing the liquid passage (110) and opening the gas passage (120) to depressurize the sewage treatment tank; After the pressure is released, the mixed wastewater is discharged through the drain pipe (310) at the bottom of the tank body (300).

6. The method of operating the wastewater treatment tank as described in claim 5, characterized in that, The gate valve (200) includes: Valve seat (210), which has a valve cavity inside; Valve plate (220), which is slidably disposed within the valve cavity; The bottom surface of the valve plate (220) is provided with a blocking block (221) radially toward the gas passage (120). The blocking block (221) has an air venting channel (222).

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