Double-acting sealing one-way valve

Abstract

The utility model discloses a double-acting sealing one-way valve which comprises a valve body assembly, a valve rod switch module and a one-way switch assembly, and the valve body assembly is provided with a material channel. The valve rod switch module comprises a valve rod movably arranged on the valve body assembly and a driving mechanism. The driving mechanism can drive the valve rod to move to the position where the material channel is blocked or opened. The one-way switch assembly comprises a blocking piece movably arranged in the material channel and a blocking base which is arranged in the material channel and can be matched with the blocking piece to block the material channel, and the blocking base and the blocking piece are sequentially arranged in the material conveying direction of the material channel so as to achieve the function of preventing materials from flowing reversely. The valve rod switch module controls discharging and stopping by controlling the position of a valve rod, the movable plugging piece is matched with the plugging base to form a one-way switch assembly, the one-way material passing function is achieved, material backflow is prevented, a double-acting sealing one-way control valve is formed, and compared with a traditional ball valve, the double-acting sealing one-way control valve has higher stability and reliability.

Description

Technical Field

[0001] This utility model relates to the field of static casting equipment technology, and in particular to a double-acting sealing check valve. Background Technology

[0002] Static casting equipment is highly susceptible to valve damage when casting materials containing fillers. For example, dry-type transformers in the electrical industry require static casting equipment to pour materials (mainly epoxy resin, curing agent, and quartz powder filler), with the quartz powder filler content exceeding 50%. Currently, static casting equipment uses a metering pump for power discharge, with a stainless steel chemical ball valve used for discharge or stop. Since quartz powder filler is a hard, wear-resistant material, essentially stone powder melted into epoxy resin or curing agent, its passage through the metering pump and discharge valve easily causes wear or severe blockage of the ball valve core. This necessitates frequent disassembly, cleaning, or replacement of the valve. Using this chemical ball valve discharge method not only results in a high failure rate and maintenance costs but also disrupts the normal casting operation of the entire system, causing significant losses to the company. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a double-acting, sealed check valve with the advantage of high reliability.

[0004] A double-acting sealed one-way valve according to a first aspect of the present invention includes: a valve body assembly, a valve stem switch module, and a one-way switch assembly. The valve body assembly is provided with a material channel. The valve stem switch module includes a valve stem movably disposed in the valve body assembly and a drive mechanism capable of driving the valve stem to move. The drive mechanism can drive the valve stem to a position that blocks or opens the material channel. The one-way switch assembly includes a blocking member movably disposed in the material channel and a blocking seat disposed in the material channel and capable of cooperating with the blocking member to block the material channel. The blocking seat and the blocking member are arranged sequentially along the material conveying direction of the material channel to achieve the function of preventing reverse flow of material.

[0005] The double-acting sealed check valve according to the present invention has at least the following beneficial effects: the valve stem switch module controls the discharge and stop of material by controlling the position of the valve stem; the movable sealing element cooperates with the sealing seat to form a one-way switch assembly, realizing the function of one-way material flow, preventing material backflow, and forming a double-acting sealed one-way control valve, which has higher stability and reliability than the traditional ball valve.

[0006] According to some embodiments of the present invention, the material channel includes a first channel, a second channel, and a third channel distributed sequentially along the material conveying direction, wherein the second channel is distributed in the vertical direction, and the first channel and the third channel form an angle with each other. The valve body assembly is provided with a sliding hole that can slidably engage with the valve stem. The sliding hole is aligned with the second channel. The driving mechanism can drive the valve stem to slide out from the sliding hole to the junction of the second channel and the third channel to block the second channel and the third channel.

[0007] According to some embodiments of the present invention, a plug seat with a through hole is provided in the second channel, and the plug seat is provided with a mating structure that can correspond to the end of the valve stem.

[0008] According to some embodiments of the present invention, a sealing assembly is provided between the inner wall of the sliding hole and the valve stem. The sealing assembly includes a plurality of O-rings and at least two V-rings, with the at least two V-rings facing opposite directions.

[0009] According to some embodiments of the present invention, the valve body assembly includes a first valve body and a second valve body detachably connected to the first valve body, the sliding hole is provided in the second valve body, the driving mechanism is installed in the second valve body, and the valve stem is detachably connected to the driving mechanism.

[0010] According to some embodiments of the present invention, the drive mechanism is detachably installed to the valve body assembly, and the valve stem is detachably connected to the drive mechanism.

[0011] According to some embodiments of the present invention, the material channel is equipped with a filter screen, and the filter screen, the one-way switch assembly, and the valve stem switch module are arranged sequentially along the material conveying direction of the material channel.

[0012] According to some embodiments of the present invention, the material channel includes a first channel, a second channel, and a third channel distributed sequentially along the material conveying direction, wherein the second channel is distributed in the up-down direction, the first channel and the third channel are respectively at an angle to each other with the second channel, and the filter screen is located at the junction of the first channel and the second channel.

[0013] According to some embodiments of the present invention, the valve body assembly is provided with a plug channel, the plug channel is aligned with and connected to the first channel, the plug channel is detachably provided with a plug, the filter screen is disposed to the plug, and when the plug is installed in the plug channel, the filter screen is located at the junction of the first channel and the second channel.

[0014] According to some embodiments of the present invention, the valve body assembly includes a first valve body and a third valve body detachably connected to the first valve body. The second channel is disposed between the first valve body and the third valve body, the first channel is disposed in the third valve body, the sealing seat and the sealing member are disposed in the second channel, and when the third valve body is disassembled from the first valve body, the sealing seat and / or the sealing member can be removed from the second channel.

[0015] According to some embodiments of the present invention, the valve body assembly further includes a fourth valve body detachably disposed between the first valve body and the third valve body. The fourth valve body is provided with a connecting hole, which forms the middle section of the second channel. The sealing member is located in the connecting hole, and the sealing seat is disposed between the third valve body and the fourth valve body.

[0016] According to some embodiments of the present invention, the connecting hole is provided with a grid mesh, and the grid mesh is located above the sealing member. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of a double-acting sealed check valve according to an embodiment of the present utility model.

[0019] Figure 2 This is a schematic cross-sectional view of the double-acting sealed check valve according to an embodiment of the present invention.

[0020] Figure 3 This is an exploded view of a double-acting, sealed check valve according to an embodiment of the present invention.

[0021] Figure 4 This is a cross-sectional structural diagram of the double-acting sealed check valve according to an embodiment of the present invention during disassembly.

[0022] Figure label:

[0023] Valve body assembly 100, first channel 101, second channel 102, third channel 103, sliding hole 104, plug channel 105, first valve body 110, second valve body 120, third valve body 130, hole position 131, fourth valve body 140, connecting hole 141, outlet seat 150;

[0024] Valve stem 210, drive mechanism 220, plug seat 230, through hole 231, O-ring seal 241, V-ring seal 242;

[0025] 310 sealing component, 320 sealing seat, 330 barrier mesh;

[0026] Filter screen 400, plug 410. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] The following is for reference. Figures 1 to 4 This invention describes a double-acting, sealed check valve according to an embodiment of the present invention.

[0032] like Figures 1 to 4 As shown, the double-acting sealed one-way valve according to an embodiment of the present invention includes: a valve body assembly 100, a valve stem switch module, and a one-way switch assembly. The valve body assembly 100 is provided with a material channel. The valve stem switch module includes a valve stem 210 movably disposed in the valve body assembly 100 and a drive mechanism 220 capable of driving the valve stem 210 to move. The drive mechanism 220 can drive the valve stem 210 to move to a position that blocks or opens the material channel. The one-way switch assembly includes a blocking member 310 movably disposed in the material channel and a blocking seat 320 disposed in the material channel and capable of cooperating with the blocking member 310 to block the material channel. The blocking seat 320 and the blocking member 310 are arranged sequentially along the material conveying direction of the material channel to achieve the function of preventing the reverse flow of material.

[0033] During operation, the valve stem switch module controls the position of the valve stem 210 to control material discharge and material stop. The movable plug 310, together with the plug seat 320, forms a one-way switch assembly to realize the function of one-way material flow, prevent material backflow, and form a double-acting sealed one-way control valve, which has higher stability and reliability than traditional ball valves.

[0034] Specifically, since the valve stem switch module and the one-way switch assembly are set separately and do not interact with each other, the one-way switch assembly can maintain normal one-way conduction function regardless of whether the valve stem switch module is in the open or closed state. When the metering pump stops, regardless of whether the valve stem switch module closes in time, it can promptly block the backflow of materials, thereby greatly improving the reliability of the valve.

[0035] In some embodiments of this utility model, the one-way switch assembly and the valve stem switch module are sequentially arranged in the material channel along the material conveying direction of the material channel, that is, the material first passes through the one-way switch assembly and then flows through the valve stem switch module, which can effectively prevent the backflow of material in the double-acting sealed one-way valve.

[0036] Of course, in the specific implementation process, the positions of the one-way switch assembly and the valve stem switch module can also be interchanged. That is, the material passes through the valve stem switch module first and then flows through the one-way switch assembly, which can also achieve the function of stopping or opening the material conveying and preventing the material backflow.

[0037] In some embodiments of this utility model, the sealing member 310 is located above the sealing seat 320. The sealing member 310 can move down to a position that cooperates with the sealing seat 320 by its own weight, thereby realizing the functions of self-sealing and self-resetting, making its unidirectional control function more stable and reliable.

[0038] Specifically, the sealing component 310 remains in a sealed position due to its own weight. When material is fed in from the inlet of the material channel, the material flows in the forward direction and can push the sealing component 310 open to open the one-way switch assembly. After passing through the valve stem switch module, it outputs normally. When the material stops being conveyed (the metering pump stops), the sealing component 310 falls to the position that cooperates with the sealing seat 320 due to its own weight, thereby preventing the material from flowing back.

[0039] It is understood that in some embodiments of this utility model, the sealing member 310 and the sealing seat 320 may not be arranged in the vertical direction. The sealing member 310 may also be reset to the position that cooperates with the sealing seat 320 by the thrust under the trend of material backflow, which can also satisfy the function of unidirectional control.

[0040] like Figures 2 to 4As shown, in some embodiments of this utility model, the material channel includes a first channel 101, a second channel 102, and a third channel 103 distributed sequentially along the material conveying direction. The second channel 102 is distributed in the vertical direction. The first channel 101 and the third channel 103 are at angles to each other with the second channel 102. The valve body assembly 100 is provided with a sliding hole 104 that can slide and cooperate with the valve stem 210. The sliding hole 104 is aligned with the second channel 102. The drive mechanism 220 can drive the valve stem 210 to slide out from the sliding hole 104 to the junction of the second channel 102 and the third channel 103 to block the second channel 102 and the third channel 103, thereby realizing the function of switch control.

[0041] Specifically, the sliding hole 104 is located outside the material channel and is used to slide with the valve stem 210 without affecting the conveying performance of the material channel. The end of the valve stem 210 blocks the second channel 102. The filler in the material, such as quartz powder, causes less wear on the valve stem 210 and the sliding hole 104, which allows the valve stem 210 and the sliding hole 104 to maintain good sealing performance. This reduces the risk of air leakage caused by valve core wear, as is common in chemical ball valves, and prevents gas from entering the cavity. This ensures that the valve can work in a high vacuum state and greatly improves the stability of the static casting equipment.

[0042] like Figures 1 to 4 As shown, in some embodiments of this utility model, an outlet seat 150 is provided at the outlet of the third channel 103, and an external pipe fitting is provided at the outlet seat 150 to facilitate the output of materials.

[0043] like Figure 2 , Figure 4 As shown, in some embodiments of this utility model, a plug seat 230 with a through hole 231 is provided in the second channel 102. The plug seat 230 is provided with a mating structure that can correspond to the end of the valve stem 210, thereby improving the sealing performance of the valve stem switch module.

[0044] Specifically, the end of the valve stem 210 is designed with a pointed structure, such as an inverted cone structure or an inverted frustum structure, and the upper edge opening of the plug seat 230 is provided with a corresponding flared structure (such as a chamfer), so that the end of the valve stem 210 and the plug seat 230 have a better sealing effect.

[0045] In some embodiments of this utility model, the plug seat 230 is detachably installed into the second channel 102 and can be replaced when wear occurs to maintain the good sealing performance of the valve stem switch module.

[0046] In some embodiments of this utility model, the valve body assembly 100 includes a first valve body 110 and a second valve body 120, a third valve body 130, and a fourth valve body 140 that are detachably connected to the first valve body 110. The plug seat 230 is disposed in the second channel 102 of the first valve body 110. After the first valve body 110 and the fourth valve body 140 are separated, the plug seat 230 can be removed downwards for easy maintenance.

[0047] Specifically, the plug seat 230 can be detachably installed to the first valve body 110 through threaded connection, tight fit, or other means. At the same time, after the first valve body 110 and the fourth valve body 140 are assembled, the fourth valve body 140 or its components can abut against the lower end of the plug seat 230, thereby stably installing the plug seat 230.

[0048] In some embodiments of this utility model, a sealing assembly is provided between the inner wall of the sliding hole 104 and the valve stem 210 to improve the sealing performance between the inner wall of the sliding hole 104 and the valve stem 210 and reduce the occurrence of leakage.

[0049] It is understood that in some embodiments of this utility model, the side wall of the valve stem 210 can also be configured to cooperate with the opening of the third channel 103, which can also achieve the function of blocking the second channel 102 and the third channel 103.

[0050] like Figure 2 , Figure 4 As shown, in some embodiments of this utility model, a sealing assembly is provided between the inner wall of the sliding hole 104 and the valve stem 210. The sealing assembly includes a plurality of O-rings 241 and at least two V-rings 242. The at least two V-rings 242 are oriented in opposite directions. The V-rings can enhance the sealing effect by utilizing internal / external pressure to achieve better sealing performance.

[0051] Specifically, the upper V-shaped sealing ring 242 has its opening facing upwards. When external air attempts to enter the valve body, the external air pressure can cause the V-shaped sealing ring 242 to tightly adhere to the inner wall of the sliding hole 104 and the outer wall of the valve stem 210, thereby achieving a better sealing effect. The lower V-shaped sealing ring 242 has its opening facing downwards and upwards. When internal material attempts to leak outwards through it, the pressure of the internal material can cause the V-shaped sealing ring 242 to tightly adhere to the inner wall of the sliding hole 104 and the outer wall of the valve stem 210, thereby achieving a better sealing effect.

[0052] It is understood that in some embodiments of this utility model, the sealing assembly may also be composed of other types of sealing rings, such as H-type sealing rings, T-type sealing rings, etc.

[0053] like Figure 2 and Figure 4As shown, in some embodiments of this utility model, an upper hole is provided on the upper part of the first valve body 110. The upper hole forms the lower section of the sliding hole 104 or is connected to the sliding hole 104. The upper hole is slidably engaged with the valve stem 210.

[0054] In some embodiments of this utility model, a sealing component, such as a sealing ring, is provided between the inner wall of the upper hole and the valve stem 210 to improve the sealing performance between the upper hole and the valve stem 210.

[0055] like Figures 1 to 4 As shown, in some embodiments of this utility model, the valve body assembly 100 includes a first valve body 110 and a second valve body 120 detachably connected to the first valve body 110. A sliding hole 104 is provided in the second valve body 120, a drive mechanism 220 is installed in the second valve body 120, and a valve stem 210 is detachably connected to the drive mechanism 220. When the valve stem 210 is worn, the second valve body 120 can be removed and the valve stem 210 can be replaced, which is convenient for maintenance and has low maintenance costs.

[0056] In some embodiments of this utility model, the drive mechanism 220 is a cylinder, and the valve stem 210 is detachably installed to the push rod of the cylinder through a threaded engagement mechanism, a clamping mechanism, etc. When the second valve body 120 is removed, the valve stem 210 can be easily replaced.

[0057] It is understood that in some embodiments of this utility model, the drive mechanism 220 may also be an electromagnet mechanism, a motor lead screw mechanism, etc., which will not be described in detail here.

[0058] It is understood that in some embodiments of this utility model, the drive mechanism 220 is detachably installed to the second valve body 120. In application, the drive mechanism 220 can also be directly removed to replace the valve stem 210.

[0059] like Figure 3 , Figure 4 As shown, in some embodiments of this utility model, the second valve body 120 is detachably installed to the first valve body 110 by means of a screw mechanism.

[0060] Of course, in the specific implementation process, the second valve body 120 can also be detachably installed to the first valve body 110 through a snap-fit ​​structure, etc., which will not be described in detail here.

[0061] In some embodiments of this utility model, a sealing element, such as a sealing ring or sealant, is provided between the second valve body 120 and the first valve body 110 to improve the sealing performance.

[0062] like Figure 3 , Figure 4 As shown, in some embodiments of this utility model, the drive mechanism 220 is detachably mounted to the second valve body 120 via a screw mechanism.

[0063] Of course, in the specific implementation process, the drive mechanism 220 can also be detachably installed to the second valve body 120 through a snap-fit ​​structure, etc., which will not be described in detail here.

[0064] In some embodiments of this utility model, a sealing element, such as a sealing ring or sealant, is provided between the second valve body 120 and the first valve body 110 to improve the sealing performance.

[0065] In some embodiments of this utility model, a sealing element, such as a sealing ring or sealant, is provided between the second valve body 120 and the drive mechanism 220 to improve the sealing performance.

[0066] In some embodiments of this utility model, the drive mechanism 220 is detachably installed to the valve body assembly 100, and the valve stem 210 is detachably connected to the drive mechanism 220. When the valve stem 210 is worn, the drive mechanism 220 can be removed and the valve stem 210 can be replaced, which is convenient for maintenance and has low maintenance costs.

[0067] like Figures 2 to 4 As shown, in some embodiments of this utility model, the material channel is equipped with a filter screen 400. The filter screen 400, the one-way switch assembly, and the valve stem switch module are arranged sequentially along the material conveying direction of the material channel. That is, the material passes through the filter screen 400 and then enters the one-way switch assembly and the valve stem switch module, which reduces the occurrence of large impurities entering the relevant mating structures and improves the reliability of the shut-off function.

[0068] like Figures 2 to 4 As shown, in some embodiments of this utility model, the material channel includes a first channel 101, a second channel 102, and a third channel 103 distributed sequentially along the material conveying direction. The second channel 102 is distributed in the vertical direction, and the first channel 101 and the third channel 103 form an angle with the second channel 102. The filter screen 400 is located at the junction of the first channel 101 and the second channel 102, thereby achieving the effect of filtering larger impurities.

[0069] Specifically, the one-way switch assembly is located in the second channel 102, and the valve stem switch module is located at the junction of the third channel 103 and the second channel 102. By placing the filter screen 400 at the junction of the first channel 101 and the second channel 102, larger impurities can be reduced from entering the second channel 102 and the third channel 103, thereby improving the reliability of the one-way switch assembly and the valve stem switch module.

[0070] like Figures 2 to 4As shown, in some embodiments of this utility model, the valve body assembly 100 is provided with a plug channel 105, which is aligned with and connected to the first channel 101. The plug channel 105 is detachably provided with a plug 410, and the filter screen 400 is disposed on the plug 410. When the plug 410 is installed in the plug channel 105, the filter screen 400 is located at the junction of the first channel 101 and the second channel 102. That is, the filter screen 400 is installed through the plug 410. When the filter screen 400 needs to be replaced or cleaned, the filter screen 400 can be removed by directly removing the plug 410, which facilitates the cleaning and replacement of the filter screen 400.

[0071] Specifically, the plug 410 is detachably installed to the plug channel 105 through a threaded engagement mechanism, a clamping mechanism, etc., and the filter screen 400 is installed to the end of the plug 410 through a threaded engagement, a tight fit, etc.

[0072] In some embodiments of this utility model, the filter screen 400 has a cylindrical structure that matches the shape of the junction between the first channel 101 and the second channel 102. The filter screen 400 is brought into the set position by the plug 410, thereby achieving the filtering effect.

[0073] like Figures 2 to 4 As shown, in some embodiments of this utility model, the valve body assembly 100 includes a first valve body 110 and a third valve body 130 detachably connected to the first valve body 110. A second channel 102 is disposed between the first valve body 110 and the third valve body 130, a first channel 101 is disposed in the third valve body 130, and a sealing seat 320 and a sealing element 310 are disposed in the second channel 102. When the third valve body 130 is disassembled from the first valve body 110, the sealing seat 320 and / or the sealing element 310 can be removed from the second channel 102, thereby facilitating the maintenance or replacement of the one-way switch assembly to maintain the good performance of the one-way switch assembly.

[0074] Specifically, the third valve body 130 and the first valve body 110 can be detachably installed using screws or the like.

[0075] Of course, in the specific implementation process, the third valve body 130 and the first valve body 110 can also be detachably connected through a clamping mechanism, etc., which will not be described in detail here.

[0076] like Figures 2 to 4As shown, in some embodiments of this utility model, the valve body assembly 100 further includes a detachable fourth valve body 140 disposed between the first valve body 110 and the third valve body 130. The fourth valve body 140 is provided with a connecting hole 141, which forms the middle section of the second channel 102. The sealing member 310 is located in the connecting hole 141, and the sealing seat 320 is disposed between the third valve body 130 and the fourth valve body 140. After the third valve body 130 and the fourth valve body 140 are removed, the sealing seat 320 and the sealing member 310 can be easily removed and replaced.

[0077] Specifically, the third valve body 130 and the first valve body 110 can be detachably installed by screws, and the fourth valve body 140 is located between the first valve body 110 and the third valve body 130, and is provided with through holes corresponding to the screws, so that the fourth valve body 140 can be clamped between the first valve body 110 and the third valve body 130.

[0078] In some embodiments of this utility model, the sealing member 310 is a sphere, and there is a gap between the sealing member 310 and the inner wall of the connecting hole 141, so that the sealing member 310 has good mobility and satisfies the functions of forward connection and reverse sealing.

[0079] In some embodiments of this utility model, sealing elements, such as sealing rings and sealant, are provided between the fourth valve body 140 and the first valve body 110, and between the fourth valve body 140 and the third valve body 130, to improve sealing performance.

[0080] As shown in the figure Figure 4 As shown, in some embodiments of this utility model, the third valve body 130 is provided with a hole 131 to form the lower section of the second channel 102. A step position corresponding to the sealing seat 320 is provided at the upper end of the hole. The sealing seat 320 is installed at the step position and is squeezed and fixed between the third valve body 130 and the fourth valve body 140 when the first valve body 110, the third valve body 130 and the fourth valve body 140 are assembled, thereby securely installing the sealing seat 320 and facilitating the disassembly of the sealing seat 320.

[0081] like Figures 2 to 4 As shown, in some embodiments of this utility model, the connecting hole 141 is provided with a grid mesh 330, which is located above the sealing member 310. The grid mesh 330 can prevent the sealing member 310 from moving too high and causing other mechanisms to fail.

[0082] Specifically, the grid mesh 330 is a mesh plate structure, which is installed on the connecting hole 141 by means of tight fitting and pressing installation. When the sealing member 310 moves up to abut against the grid mesh 330, the sealing member 310 can only block part of the mesh holes. The grid mesh 330 with mesh plate structure still has some mesh holes in the connected state, so as to maintain the normal forward conveying performance of the connecting hole 141.

[0083] like Figures 2 to 4 As shown, in some embodiments of this utility model, the sealing member 310 is a spherical structure, the sealing seat 320 is an annular structure, and the upper opening edge of the sealing member 310 is provided with an arc-shaped surface corresponding to the sealing member 310, so as to achieve a better sealing effect.

[0084] Specifically, the sealing component 310 is made of steel balls, which has good structural strength, good corrosion resistance, and a long service life.

[0085] It is understood that in some embodiments of this utility model, the sealing member 310 can also be configured in other shapes such as a cone, a frustum, a spherical column, etc., and the sealing seat 320 is configured accordingly to achieve a better unidirectional control effect.

[0086] Of course, this invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A double-acting, sealed check valve, characterized in that, include: Valve body assembly (100), wherein the valve body assembly (100) is provided with a material passage; A valve stem switch module includes a valve stem (210) movably disposed in the valve body assembly (100) and a drive mechanism (220) capable of driving the valve stem (210) to move. The drive mechanism (220) can drive the valve stem (210) to move to a position that blocks the material channel or opens the material channel. A one-way switch assembly includes a blocking member (310) movably disposed in the material channel and a blocking seat (320) disposed in the material channel and capable of cooperating with the blocking member (310) to block the material channel. The blocking seat (320) and the blocking member (310) are arranged sequentially along the material conveying direction of the material channel.

2. The double-acting sealed check valve according to claim 1, characterized in that, The material channel includes a first channel (101), a second channel (102), and a third channel (103) distributed sequentially along the material conveying direction. The second channel (102) is distributed in the vertical direction. The first channel (101) and the third channel (103) are respectively angled to the second channel (102). The valve body assembly (100) is provided with a sliding hole (104) that can slidably engage with the valve stem (210). The sliding hole (104) is aligned with the second channel (102). The driving mechanism (220) can drive the valve stem (210) to slide out from the sliding hole (104) to the junction of the second channel (102) and the third channel (103) to block the second channel (102) and the third channel (103).

3. The double-acting sealed check valve according to claim 2, characterized in that, The second channel (102) is provided with a plug seat (230) having a through hole, and the plug seat (230) is provided with a mating structure that can correspond to the end of the valve stem (210).

4. The double-acting sealed check valve according to claim 2, characterized in that, A sealing assembly is provided between the inner wall of the sliding hole (104) and the valve stem (210). The sealing assembly includes a plurality of O-rings (241) and at least two V-rings (242), with the at least two V-rings (242) facing opposite directions.

5. The double-acting sealed check valve according to claim 2, 3, or 4, characterized in that, The valve body assembly (100) includes a first valve body (110) and a second valve body (120) detachably connected to the first valve body (110). The sliding hole (104) is provided in the second valve body (120). The drive mechanism (220) is installed in the second valve body (120). The valve stem (210) is detachably connected to the drive mechanism (220).

6. The double-acting sealed check valve according to claim 1 or 2, characterized in that, The drive mechanism (220) is detachably mounted to the valve body assembly (100), and the valve stem (210) is detachably connected to the drive mechanism (220).

7. The double-acting sealed check valve according to claim 1, characterized in that, The material channel is equipped with a filter screen (400), and the filter screen (400), the one-way switch assembly and the valve stem switch module are arranged sequentially along the material conveying direction of the material channel.

8. The double-acting sealed check valve according to claim 7, characterized in that, The material channel includes a first channel (101), a second channel (102), and a third channel (103) distributed sequentially along the material conveying direction. The second channel (102) is distributed in the vertical direction. The first channel (101) and the third channel (103) are at angles to each other with the second channel (102). The filter screen (400) is located at the junction of the first channel (101) and the second channel (102).

9. The double-acting sealed check valve according to claim 8, characterized in that, The valve body assembly (100) is provided with a plug channel (105), which is aligned with and connected to the first channel (101). The plug channel (105) is detachably provided with a plug (410). The filter screen (400) is disposed on the plug (410). When the plug (410) is installed on the plug channel (105), the filter screen (400) is located at the junction of the first channel (101) and the second channel (102).

10. The double-acting sealed check valve according to claim 8 or 9, characterized in that, The valve body assembly (100) includes a first valve body (110) and a third valve body (130) detachably connected to the first valve body (110). The second channel (102) is located between the first valve body (110) and the third valve body (130). The first channel (101) is located in the third valve body (130). The sealing seat (320) and the sealing element (310) are located in the second channel (102). When the third valve body (130) is disassembled from the first valve body (110), the sealing seat (320) and / or the sealing element (310) can be removed from the second channel (102).

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