Pressure release valve for filter bottle and filter bottle

Abstract

The utility model relates to a pressure release valve for a filter bottle and the filter bottle. The pressure release valve for the filter bottle comprises a valve body, a valve rod and a valve rod, the valve rod comprises a first rod section and a second rod section which are connected with each other, the first rod section is arranged in the valve rod hole in a penetrating mode and can move along the valve rod hole, the second rod section is sleeved with a spring, and the diameter of the second rod section is larger than that of the first rod section; the end part of the second rod section is used for sealing a pressure relief hole of the filter bottle. According to the pressure release valve for the filter bottle and the filter bottle, pressure can be smoothly released when the pressure in the filter bottle is large, the reliability is high, and the service life is long.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, especially a kind of filter bottle pressure relief valve and filter bottle for filter bottle. BACKGROUND

[0002] There may be a certain amount of particulate matter or precipitate impurities in the process of tap water delivery, installing filter bottle in tap water delivery system can further purify tap water, improve water quality. Water flow in tap water pipeline system can change dramatically, for example, when valve is suddenly closed or opened, the flow rate of water flow changes instantaneously, the pressure wave generated is transmitted to filter bottle, causing the pressure in filter bottle to increase, or when filter core needs to be replaced or filter bottle is maintained, directly disassembling filter bottle can cause high-pressure water to spray out, causing equipment damage.

[0003] When the pressure in filter bottle is too high, pressure relief can be achieved by automatic or manual opening of pressure relief valve. Pressure relief valve is usually installed at the top, side or special pressure relief port of filter bottle, and the pressure value can be set in advance, when the pressure exceeds the preset pressure value, valve is automatically opened or opened by manual operation. Valve usually relies on the elastic deformation of spring to achieve automatic opening and resetting, if the force acting on spring is large, it may be over-compressed or bent radially, affecting the service life of pressure relief valve and filter bottle. SUMMARY

[0004] Therefore, it is necessary to provide a filter bottle pressure relief valve and filter bottle with better sealing performance for the problem of poor sealing performance of pressure relief valve.

[0005] In a first aspect, a filter bottle pressure relief valve is provided, comprising:

[0006] A valve body having a valve rod hole;

[0007] A valve rod comprising a first rod segment and a second rod segment connected to each other, the first rod segment is arranged in the valve rod hole and can move along the valve rod hole, the second rod segment is sleeved with a spring, and the diameter of the second rod segment is greater than that of the first rod segment; the end of the second rod segment is used to seal the pressure relief hole of the filter bottle.

[0008] In one embodiment, the end of the second rod segment is provided with a mounting groove, and a sealing gasket is arranged in the mounting groove, and the sealing gasket is used to seal the pressure relief hole of the filter bottle.

[0009] In one embodiment, the thickness of the sealing gasket is greater than or equal to the depth of the mounting groove.

[0010] In one of the embodiments, an annular groove is arranged on the first rod segment, and a first sealing ring is arranged in the annular groove, wherein the outer diameter of the first sealing ring is greater than the inner diameter of the valve rod hole.

[0011] In one of the embodiments, a second sealing ring is arranged on the outer surface of the valve body, and the second sealing ring is used to seal the gap between the valve body and the valve seat of the filter bottle.

[0012] In one of the embodiments, the diameter of the second rod segment is greater than the inner diameter of the valve rod hole.

[0013] In one of the embodiments, a pressure relief handle is further included, and the first rod segment is rotationally connected to the pressure relief handle at one end of the valve body, and the pressure relief handle is used to drive the valve rod to extend out of or retract into the valve rod hole when the pressure relief handle is rotated.

[0014] In a second aspect, a filter bottle is provided, and the filter bottle comprises:

[0015] a valve seat, wherein a pressure relief hole is arranged on the valve seat, and the pressure relief hole is in communication with the inner cavity of the filter bottle and a drainage channel of the filter bottle when the pressure relief hole is opened; and

[0016] a pressure relief valve as described in the first aspect or any of the embodiments of the first aspect, wherein the pressure relief valve is installed on the valve seat, and the pressure relief valve is used to seal the pressure relief hole when the internal pressure of the filter bottle is less than or equal to a preset pressure threshold, and the pressure relief valve is used to open the pressure relief hole to release pressure of the filter bottle when the internal pressure of the filter bottle is greater than the preset pressure threshold.

[0017] In one of the embodiments, the filter bottle comprises a bottle body and an upper cover, a metal nut is embedded in the inside of the upper cover, and the pressure relief valve is connected to the filter bottle through the metal nut.

[0018] In one of the embodiments, the drainage channel comprises at least two channel segments connected to each other, and the inner diameter of each channel segment gradually increases in the direction from the pressure relief hole to the drainage port.

[0019] In one of the embodiments, the filter bottle comprises a drainage port, the drainage port is used to connect a drainage pipe, and a third sealing ring is arranged between the drainage port and the drainage pipe.

[0020] In one of the embodiments, a plurality of third sealing rings are arranged between the drainage port and the drainage pipe.

[0021] The first rod section of the valve rod is arranged in the valve rod hole and can move along the valve rod hole, the second rod section has a larger diameter than the first rod section, and a spring is sleeved on the second rod section, so that the opening and closing of the pressure relief valve can be accurately controlled through the movement of the valve rod in the valve rod hole, the spring provides stable pressure regulation function, when the set pressure is reached, the valve rod is accurately moved through the action of the spring, the pressure relief hole is opened and the high pressure is released, the filter bottle and its internal structure are protected from the influence of excessive pressure, the second rod section has a larger diameter, which provides a larger support area, so that the spring can be prevented from being excessively compressed or bent radially under the action of excessive stress, the pressure relief hole can be smoothly opened, and the service life of the spring can be prolonged, the valve rod moves smoothly in the valve rod hole through the first rod section, so that the pressure relief process is more sensitive and smooth, when manual operation is required, the pressure relief valve can be opened or closed without too much force, thereby improving the convenience and operation efficiency. The pressure relief valve and the filter bottle structure can smoothly release pressure when the pressure in the filter bottle is high, have high reliability and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 A cross-sectional structure schematic view of a closed state of a pressure relief valve for a filter bottle provided by an embodiment of the present application;

[0024] Figure 2 A cross-sectional structure schematic view of an open state of a pressure relief valve for a filter bottle provided by an embodiment of the present application;

[0025] Figure 3 An exploded view of a pressure relief valve for a filter bottle provided by an embodiment of the present application;

[0026] Figure 4 A structure schematic view of a filter bottle provided by an embodiment of the present application;

[0027] Figure 5 A cross-sectional structure schematic view of a filter bottle provided by an embodiment of the present application.

[0028] In order to make the above and other purposes, features, advantages and embodiments of the present application more obvious and easy to understand, the following is a description of the symbols:

[0029] 100: pressure relief valve, 110: valve body, 111: valve rod hole; 120: valve rod, 121: first rod section, 122: second rod section, 123: first sealing ring, 124: mounting groove; 125: annular groove; 130: sealing gasket, 140: spring, 150: second sealing ring, 160: pressure relief handle, 170: rotation shaft, 200: filter bottle, 210: upper cover, 211: valve seat, 212: drainage channel, 213: metal nut, 214: third sealing ring, 215: drainage port; 216: pressure relief hole, 220: bottle body, 221: inner cavity. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purpose, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a sufficient understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0033] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through the intermediate medium, can be the communication of two elements or the interaction of two elements, unless another definite limitation.For the ordinary skilled person in the art, the above terms can be understood according to the specific meaning of the utility model.

[0034] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium.Moreover, the first feature "above", "above" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature.The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0035] It should be noted that when an element is referred to as "fixed to" or "provided to" another element, it can be directly on another element or there can be a middle element.When an element is referred to as "connected to" another element, it can be directly connected to another element or there can be a middle element.The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0036] Figure 1 The cross-sectional structure schematic diagram of the closed state of the pressure relief valve for filter bottle provided by an embodiment of the application is shown in the figure; Figure 2 The cross-sectional structure schematic diagram of the open state of the pressure relief valve for filter bottle provided by an embodiment of the application is shown in the figure; Figure 3 The exploded view of the pressure relief valve for filter bottle provided by an embodiment of the application is shown in the figure; Figures 1 to 3 The pressure relief valve for filter bottle provided by an embodiment of the application is shown in the figure;

[0037] The valve body 110 is provided with a valve rod hole 111;

[0038] The valve rod 120 includes a first rod segment 121 and a second rod segment 122 connected to each other, the first rod segment 121 is arranged in the valve rod hole 111 and can move along the valve rod hole 111, the second rod segment 122 is sleeved with the spring 140 and the diameter of the second rod segment 122 is larger than that of the first rod segment 121; the end of the second rod segment 122 is used to seal the pressure relief hole 216 of the filter bottle 200. The end of the second rod segment 122 is provided with a mounting groove 124, and the sealing gasket 130 is arranged in the mounting groove 124, and the sealing gasket 130 is used to seal the pressure relief hole 216 of the filter bottle 200.

[0039] In the above-mentioned pressure relief valve for filter bottle and filter bottle 200, the first rod segment 121 of the valve rod 120 is arranged in the valve rod hole 111 and can move along the valve rod hole 111, the diameter of the second rod segment 122 is larger than that of the first rod segment 121, and the spring 140 is sleeved on the second rod segment 122, the opening and closing of the pressure relief valve 100 can be accurately controlled by the movement of the valve rod 120 in the valve rod hole 111, the spring 140 provides stable pressure regulation function, when the set pressure is reached, the valve rod 120 moves accurately by the action of the spring 140, the pressure relief hole 216 is opened and the excessive pressure is released, the filter bottle 200 and its internal structure are protected from the influence of excessive pressure, the end of the second rod segment 122 is provided with the mounting groove 124, and the sealing gasket 130 is arranged in the mounting groove 124, when the pressure relief valve 100 is closed, the pressure relief hole 216 of the filter bottle 200 is in a sealed state, external air or other impurities are prevented from entering the filter bottle 200, leakage of the medium in the filter bottle 200 is avoided, the safety and stability of the whole system can be improved, the filtering effect can be guaranteed and external pollution can be prevented, the diameter of the second rod segment 122 is larger, a larger supporting area is provided, deformation of the valve rod 120 caused by excessive stress under high pressure can be avoided, at the same time, the spring 140 can effectively absorb and buffer the pressure impact from the inside of the filter bottle 200, damage of the system caused by sudden pressure change is prevented, and the service life of the pressure relief valve 100 is prolonged, the valve rod 120 moves smoothly in the valve rod hole 111 through the first rod segment 121, the pressure relief process is more sensitive and smooth, when manual operation is needed, the pressure relief valve 100 can be opened or closed without too much force, thereby improving the convenience and operation efficiency, the pressure relief valve 100 not only ensures that the pressure in the filter bottle 200 is within a safe range, but also effectively prevents leakage or damage of the filter bottle 200 due to its sealing performance and structural stability. By releasing pressure in appropriate cases, the overall life of the filter bottle 200 and the filtering system can be prolonged, the maintenance requirements and operating costs of the equipment can be reduced.

[0040] In one exemplary embodiment, the end of the second rod segment 122 is provided with the mounting groove 124, and the sealing gasket 130 is arranged in the mounting groove 124, and the sealing gasket 130 is used to seal the pressure relief hole 216 of the filter bottle 200.

[0041] In an exemplary embodiment, the thickness of the sealing gasket 130 is greater than or equal to the depth of the mounting groove 124.

[0042] In which the thickness of the sealing gasket 130 is greater than the depth of the mounting groove 124 can make the sealing gasket 130 and the pressure relief hole 216 reliable cooperation, and not easy to leak when the sealing gasket 130 is pressed.

[0043] In an exemplary embodiment, the first rod section 121 is provided with an annular groove 125, and the annular groove 125 is provided with a first sealing ring 123, and the outer diameter of the first sealing ring 123 is greater than the inner diameter of the valve rod hole 111.

[0044] Because the gap between the first rod section 121 and the valve rod hole 111 is small, in order to avoid liquid leakage from the gap, the gap needs to be sealed, but the gap is small, and there may be problems such as difficulty in installing the sealing ring or easy dislocation, and the first rod section 121 is grooved to position the sealing ring, and the sealing ring can seal the gap between the valve rod 120 and the valve rod hole 111 well, and the sealing ring will not move during the up and down movement of the valve rod 120, ensuring the reliability of the sealing.

[0045] In an exemplary embodiment, the outer surface of the valve body 110 is sleeved with a second sealing ring 150, and the second sealing ring 150 is used to seal the gap between the valve body 110 and the valve seat 211 of the filter bottle 200.

[0046] The pressure relief valve 100 is usually installed on the valve seat 211 of the filter bottle 200, in order to prevent water from leaking from the gap between the valve body 110 and the valve seat 211, a sealing ring can be sleeved on the outer surface of the valve body 110, and the outer diameter of the sealing ring can be greater than or equal to the inner diameter of the valve seat 211.

[0047] In an exemplary embodiment, the diameter of the second rod section 122 is greater than the inner diameter of the valve rod hole 111.

[0048] The diameter of the second rod section 122 is greater than the inner diameter of the valve rod hole 111, which can avoid the valve rod 120 from being separated from the valve body 110 during the lifting process, and can limit the position. The diameter of the end of the second rod section 122 is greater than the inner diameter of the spring 140. The valve rod 120 can be a stepped shaft structure as shown in the figure, wherein the diameter of the first rod section 121 is the smallest, the second rod section 122 is divided into two sections, one section with a smaller diameter is sleeved with the spring 140, and the other section with a larger diameter is used for installing the sealing gasket 130. In other embodiments, the second rod section 122 can have more sections, or a tapered structure with the diameter gradually increasing to the end. The diameter of the section sleeved with the spring 140 can be close to the inner diameter of the spring 140, which can prevent the spring 140 from being bent during compression and affecting the normal opening of the pressure relief valve 100. Correspondingly, the end of the valve body 110 in contact with the spring 140 can also be provided with a limiting structure, and the outer diameter of the limiting structure can be close to the inner diameter of the spring 140, which can also prevent bending.

[0049] In an exemplary embodiment, a pressure relief handle 160 is further included, and the first rod section 121 is rotatably connected to the pressure relief handle 160 at an end extending out of the valve body 110. The pressure relief handle 160 is used to rotate to drive the valve rod 120 to extend out of or retract into the valve rod hole 111.

[0050] The pressure relief handle 160 can be as shown in the figure, the first end is connected to the first rod section 121, and the second end is a free end. There is a certain distance between the connection position and the second end, so as to facilitate holding. The pressure relief handle 160 can be rotatably connected to the first rod section 121 through a rotating shaft 170. When the pressure relief valve 100 is not opened, the pressure relief handle 160 is in a horizontal state. When the spring 140 fails to work normally or for other reasons, manual pressure relief is required. Hold the pressure relief handle 160 and rotate it, so that the end of the pressure relief handle 160 abuts against the surface of the valve body 110, and then drives the valve rod 120 to move upward along the valve rod hole 111, so that the pressure relief hole 216 is in communication with the drainage passage 212. The water in the filter bottle 200 flows out through the drainage passage 212, and manual pressure relief is achieved.

[0051] Figure 4 A structural schematic diagram of a filter bottle 200 according to an embodiment of the present application is provided; Figure 5 A sectional structural schematic diagram of a filter bottle 200 according to an embodiment of the present application is provided. Referring to Figures 4 to 5 The present application also provides a filter bottle 200, which comprises:

[0052] A valve seat 211 is provided, and the valve seat 211 is provided with a pressure relief hole 216. When the pressure relief hole 216 is opened, the inner cavity 221 of the filter bottle 200 and the drainage passage 212 of the filter bottle 200 are in communication; and

[0053] The pressure relief valve 100 is installed on the valve seat 211; the pressure relief valve 100 is used to seal the pressure relief hole 216 when the internal pressure of the filter bottle 200 is less than or equal to the preset pressure threshold, and open the pressure relief hole 216 to relieve the pressure of the filter bottle 200 when the internal pressure is greater than the preset pressure threshold.

[0054] Wherein, the filter bottle 200 can be a filter bottle 200 in a tap water pipeline, the pressure relief valve 100 can be installed on the upper part or side of the filter bottle 200, or other positions provided with the pressure relief hole 216. The pressure threshold can be related to the spring force of the spring 140, and the pressure threshold can be set according to the stiffness and initial compression amount of the spring 140. When the filter bottle 200 is working normally, the internal pressure is lower than the pressure threshold, the spring 140 presses the valve rod 120 on the pressure relief hole 216 to maintain sealing. When the internal pressure of the filter bottle 200 is greater than the pressure threshold, the fluid pressure is greater than the counterforce of the spring 140, the spring 140 is compressed, the valve core is pushed away, the valve is opened, and the fluid in the system flows into the drain 215, thereby releasing the pressure. When the pressure decreases below the pressure threshold, the counterforce of the spring 140 pushes the valve rod 120 back to reseal the pressure relief valve 100.

[0055] In an exemplary embodiment, the filter bottle 200 includes a bottle body 220 and an upper cover 210, the upper cover 210 is embedded with a metal nut 213 inside, and the pressure relief valve 100 is connected with the filter bottle 200 through the metal nut 213.

[0056] Wherein, the bottle body 220 of the filter bottle 200 can be a cylindrical structure, and the outer wall of the bottle body 220 can be provided with reinforcing ribs. The bottle body 220 and the upper cover 210 can be made of transparent or translucent plastic materials, such as polycarbonate or acrylic, to facilitate observation of the working condition of the liquid inside the filter bottle 200 and the filter element. The bottle body 220 and the upper cover 210 can be connected through threads, buckles or other structures. Since the plastic material is usually light, it is easy to cause wear or damage to the threads under the condition of multiple disassembly and assembly, which affects the sealing performance of the filter bottle 200. Therefore, by embedding the metal nut 213 inside the upper cover 210 and connecting the pressure relief valve 100 through the metal nut 213, the connection strength between the upper cover 210 and the pressure relief valve 100 can be enhanced, and the threads are not easy to be damaged during the disassembly and assembly of the pressure relief valve 100. The metal nut 213 can be embedded in the upper cover 210 during the mold forming process of the upper cover 210.

[0057] In an exemplary embodiment, the filter bottle 200 includes a drain 215 for connecting a drain pipe, and a third sealing ring 214 is arranged between the drain 215 and the drain pipe.

[0058] The third sealing ring 214 can be a rubber sealing ring. As shown in the figure, a drainage channel 212 is arranged between the drainage port 215 and the pressure relief hole 216, and when the pressure relief valve 100 is opened, the water in the filter bottle 200 can flow into the drain pipe along the drainage channel 212. The end of the drainage channel 212 close to the drainage port 215 is a stepped surface structure, and the inner diameter of the drainage channel 212 close to the drainage port 215 gradually increases, which facilitates the positioning of the third sealing ring 214 and the drain pipe.

[0059] In an exemplary embodiment, the drainage channel 212 includes at least two channel segments connected to each other, and the inner diameter of each channel segment gradually increases in the direction from the pressure relief hole 216 to the drainage port 215. The drainage channel 212 includes multiple channel segments, and the inner diameter of the multiple channel segments gradually increases in the direction from the pressure relief hole 216 to the drainage port 215. This can reduce the flow resistance of the water during pressure relief, gradually reduce the flow rate of the water from the pressure relief hole 216 to the drainage port 215, and thus make the drainage process more stable, improve the drainage efficiency, and reduce the pressure relief time.

[0060] In an exemplary embodiment, multiple third sealing rings 214 are arranged between the drainage port 215 and the drain pipe.

[0061] In an exemplary embodiment, the assembly steps of the pressure relief valve 100 and the filter bottle 200 include:

[0062] Step 1: Assemble the sealing ring 1 with the pressure relief valve 100 body, the sealing ring 2 and the sealing gasket 130 with the pressure relief valve 100 rod.

[0063] Step 2: Insert the assembled pressure relief valve 100 rod through the spring 140 and the center of the pressure relief valve 100 body, and then fix the assembly by screwing the pressure relief valve 100 body with the screw thread on the filter bottle 200 upper cover 210.

[0064] Step 3: Finally, fix the pressure relief handle 160 with the pressure relief valve 100 rod by fixing the handle fixing shaft.

[0065] The sizes of the plurality of third sealing rings 214 can be the same or different, and the plurality refers to at least two, and the number of the third sealing rings 214 can be adjusted according to actual needs. The plurality of sealing rings can provide more reliable sealing effect, effectively prevent water or other liquids from leaking from the connection between the drain port 215 and the drain pipe, even if one of the sealing rings fails due to wear or aging, the other sealing rings can still continue to function, further improving the overall sealing performance. And the plurality of sealing rings can share the pressure together, avoid that a single sealing ring bears too much pressure and is damaged, thereby prolonging the service life of the sealing part, and the plurality of sealing rings can also better absorb vibration. When there is a positioning error or a loose fit between the drain pipe and the drain port 215 during installation, or when slight displacement occurs between the drain pipe and the drain port 215 under the influence of external vibration, the plurality of sealing rings can ensure good sealing effect.

[0066] The pre-filter bottle 200 has water pressure in the interior due to the connection with the tap water pipeline, and when the pressure in the interior of the filter bottle 200 rapidly alternates, water hammer effect is generated, which can damage the equipment. When the pressure in the interior of the filter bottle 200 rapidly changes, the pressure in the interior acts on the sealing gasket 130 of the pressure relief valve 100, and when the pressure exceeds the set pressure value of the pressure relief valve 100, the pressure in the interior pushes the sealing gasket 130 and the rod of the pressure relief valve 100 upward, and the pressure relief valve 100 is in an open state. The pressure in the interior of the filter bottle 200 is discharged through the drain port 215, so as to reduce the pressure in the interior of the filter bottle 200 and play a protection role. When the pressure in the interior is reduced to the set value, the spring 140 automatically presses the rod of the pressure relief valve 100 downward, and the sealing gasket 130 and the upper cover 210 of the filter bottle 200 are sealed again.

[0067] Any combination of the technical features of the above-described embodiments can be made, and in order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combination of the technical features does not exist, it should be considered as the scope of the description.

[0068] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A pressure relief valve for a filter bottle, characterized by, The pressure relief valve for the filter bottle comprises: a valve body (110) having a valve rod hole (111) formed therein; a valve rod (120) comprising a first rod segment (121) and a second rod segment (122) connected to each other, the first rod segment (121) being arranged in the valve rod hole (111) and movable along the valve rod hole (111), the second rod segment (122) having a spring (140) arranged thereon and having a diameter greater than that of the first rod segment (121), and an end of the second rod segment (122) being used to seal a pressure relief hole (216) of a filter bottle (200).

2. The pressure relief valve for a filter bottle according to claim 1, characterized by An end of the second rod segment (122) is provided with a mounting groove (124) having a sealing gasket (130) arranged therein, the sealing gasket (130) being used to seal the pressure relief hole (216) of the filter bottle (200).

3. The pressure relief valve for a filter bottle according to claim 2, characterized by The thickness of the sealing gasket (130) is greater than or equal to the depth of the mounting groove (124).

4. The pressure relief valve for a filtered bottle according to claim 1, characterized by The first rod segment (121) is provided with an annular groove (125) having a first sealing ring (123) arranged therein, the first sealing ring (123) having an outer diameter greater than the inner diameter of the valve rod hole (111).

5. The pressure relief valve for a filtered bottle according to claim 1, characterized by The outer surface of the valve body (110) is provided with a second sealing ring (150) used to seal the gap between the valve body (110) and a valve seat (211) of the filter bottle (200).

6. The pressure relief valve for a filtered bottle according to claim 1, characterized by Further comprising a pressure relief handle (160), one end of the first rod segment (121) extending out of the valve body (110) is rotationally connected to the pressure relief handle (160), and the pressure relief handle (160) is used to rotate and drive the valve rod (120) to extend out of or retract into the valve rod hole (111).

7. A filter bottle characterized in that, The filter bottle (200) comprises: a valve seat (211) provided with a pressure relief hole (216), the pressure relief hole (216) being in communication with an inner cavity (221) of the filter bottle (200) and a drain passage (212) of the filter bottle (200) when opened; and The pressure relief valve according to any one of claims 1-6 is arranged on the valve seat (211), and is used to seal the pressure relief hole (216) when the internal pressure of the filter bottle (200) is less than or equal to a preset pressure threshold, and to open the pressure relief hole (216) to relieve the pressure of the filter bottle (200) when the internal pressure is greater than the preset pressure threshold.

8. The filter bottle of claim 7, wherein, The filter bottle comprises a bottle body (220) and an upper cover (210), the upper cover (210) has a metal nut (213) embedded therein, and the pressure relief valve is connected to the filter bottle (200) through the metal nut (213).

9. The filter bottle of claim 8, wherein, The filter bottle (200) comprises a drain port (215) used to connect a drain pipe, and a third sealing ring (214) is arranged between the drain port (215) and the drain pipe.

10. The filter bottle of claim 9, wherein, The drainage passage (212) comprises at least two mutually connected passage sections, the inner diameter of each passage section gradually increasing in the direction of the pressure relief hole (216) towards the drainage opening (215).

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