Discharging valve

Abstract

The invention relates to the technical field of valves, and particularly discloses a discharging valve which comprises a valve body, a valve element, a valve seat and a valve rod. The valve rod is limited up and down and elastically slides on the valve element, a scraping plate and a cleaning assembly are installed on the valve rod, a guide rod penetrating to the bottom of the scraping plate is connected to the cleaning assembly, a sealing plate in sealed connection with the valve body is connected to the bottom of the guide rod, a water supply piece is further connected to the scraping plate, and an opening and a net plate for sealing the opening are formed in the middle of the scraping plate; the cleaning assembly comprises a mounting ring and a plurality of arc-shaped plates elastically sliding in the radial direction of the mounting ring, a circular truncated cone in threaded connection with the valve rod is arranged at the axis of the mounting ring in an up-down sliding mode, and a plurality of arc-shaped grooves are evenly distributed in the periphery of the circular truncated cone. When the valve body is cleaned, cleaned impurities can be prevented from flowing out along with feed liquid, meanwhile, the cleaned impurities can be stored, the valve body can be disassembled to clean the impurities after multiple times of cleaning, and frequent disassembly of the valve body is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a discharge valve. Background Art

[0002] In the discharge valve that controls the inflow and outflow of materials, the movement of the valve stem is generally controlled by the actuator. The movement of the valve stem drives the movement of the valve core, so that the valve core blocks the feed port (the sealing surface of the valve core and the valve seat are completely fitted and in close contact) and closes the valve, so that the valve is in a closed state and the material cannot pass through the feed port; conversely, when the valve core moves to create a gap between it and the valve seat, the valve is opened and the material can pass through the feed port.

[0003] For example, a Chinese patent document with the announcement number CN118669544B discloses a high-temperature wear-resistant downward-expanding discharge valve, comprising: a discharge valve body, which is provided with a discharge channel, the discharge channel includes an inlet portion connected to a material container and an outlet portion for discharging materials; a valve stem, one end of which is provided with a valve flap, and the movement of the valve stem can drive the valve flap to close the inlet portion of the discharge channel or open the inlet portion of the discharge channel; the valve flap is provided with a cleaning hole for spraying a cleaning medium to the inlet portion, the valve stem is provided with a cleaning channel connected to the cleaning hole, and the discharge valve body is provided with an external cleaning port, and when the valve stem moves from a position for opening the inlet portion of the discharge channel to a position for closing the inlet portion of the discharge channel, the external cleaning port can be connected to the cleaning channel to supply the cleaning medium into the cleaning channel. The discharge valve of this invention can effectively solve the poor sealing caused by material adhesion on the sealing surface.

[0004] In the above patent document, the valve is cleaned through an external cleaning interface. During the cleaning process, only part of the valve can be cleaned, and impurities may exist in other parts of the valve body, which will affect the sealing of the valve. In the prior art, there are other cleaning devices for cleaning the inner wall of the valve body, but generally the valve body is disassembled to clean the impurities on the inner wall of the valve body. This cleaning method requires multiple disassembly of the valve body, which is more troublesome. Alternatively, the cleaning piece moves up and down on the inner wall of the valve body to scrape off the impurities on the inner wall of the valve body. The scraped impurities and impurities flow out of the discharge pipe with the feed liquid, which will affect the purity of the feed liquid. Summary of the invention

[0005] The present invention provides a discharge valve, aiming to solve the problem that the valve cleaning device in the prior art may affect the purity of the feed liquid when cleaning the valve.

[0006] A discharge valve comprises a valve body, a valve core, a valve seat and a valve stem; the valve stem is limited in upper and lower positions and slides elastically on the valve core, a scraper and a cleaning assembly are installed on the valve stem, a guide rod penetrating to the bottom of the scraper is connected to the cleaning assembly, a sealing plate sealingly connected to the valve body is connected to the bottom of the guide rod, and a water supply part is also connected to the scraper; An opening and a mesh plate for closing the opening are provided in the middle of the scraper. The cleaning assembly includes a mounting ring and a plurality of arc plates that slide elastically in the radial direction of the mounting ring. A truncated cone that is threadedly connected to the valve stem is provided at the axis of the mounting ring for sliding up and down movement. A plurality of arc grooves are evenly distributed on the outer circumference of the truncated cone. One end of the arc plate is slidably provided in the arc groove. When the valve stem rotates, the cleaning assembly moves toward the scraper to clean the valve body and push the mesh plate down to open the opening. The water supply part supplies water to flush impurities on the scraper into the sealing plate. When the valve stem descends and then rotates in the opposite direction, the truncated cone loses thrust and slides upward to separate the arc plate from the inner wall of the valve body. The mesh plate loses thrust to close the opening, and the sealing plate moves upward to squeeze water out of the mesh plate.

[0007] The beneficial effects of the present invention are as follows: when the valve body is cleaned, impurities after cleaning can be prevented from flowing out with the slurry, and after the inner wall of the slurry is cleaned, the cleaning component no longer contacts the inner wall of the valve body when moving upward, avoiding pushing the impurities upward, causing the impurities to flow out with the slurry when the inner wall of the valve body is cleaned again, and the impurities after cleaning can be stored, and the valve body can be disassembled after multiple cleanings to clean the impurities, avoiding frequent disassembly of the valve body.

[0008] Preferably, the valve stem and the valve core are connected in an up-and-down sliding manner, and a compression spring is connected between the top of the valve stem and the valve core, so that the valve stem and the valve core can slide relative to each other.

[0009] Preferably, the cleaning assembly further comprises a slide groove opened along the radial direction of the mounting ring, a slider is opened on the arc plate, the slider is slidably arranged in the slide groove, and a tension spring is installed between the slider and the slide groove, so that the arc plate slides along a fixed direction.

[0010] Preferably, adjacent arc plates are alternately arranged up and down, and when the arc plates slide toward the middle of the mounting ring, the overlapping area between adjacent arc plates gradually increases, and when the arc plates move toward the inner wall of the mounting valve body, the overlapping area between adjacent arc plates gradually decreases; so that the inner wall of the valve body can be completely cleaned after the arc plates come into contact with the mounting ring.

[0011] Preferably, the thickness of the scraper gradually decreases from the periphery to the middle so that the scraper forms a basin-shaped structure. When the water supply member supplies water to the scraper, water flows down from the opening, flushing impurities on the scraper out from the opening.

[0012] Preferably, a plurality of water grooves connected to the water supply member are provided on the scraper, and the water outlet ends of the water grooves are located at the edge of the top of the scraper, so that impurities can be cleaned more quickly.

[0013] Preferably, a water outlet groove is provided on the mounting ring and the arc plate, and a sealing block corresponding to the water outlet groove can be provided on the scraper. When the valve body is closed, the liquid on the top of the valve body flows out from the water outlet groove, thereby avoiding the presence of liquid on the top of the valve body.

[0014] Screws are connected between the sealing plate and the guide rod, and the sealing plate and the valve stem are slidably and sealedly connected, so that the sealing plate can be easily disassembled.

[0015] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 1. When cleaning impurities, when the cleaning assembly moves downward, the arc plate contacts the inner wall of the valve body, and the inner wall of the valve body is cleaned more completely. When the cleaning assembly moves upward, the arc plate is out of contact with the inner wall of the valve body to avoid pushing the impurities upward, causing the impurities to flow out with the liquid when the valve body is cleaned again, and preventing the impurities from accumulating on the top of the valve body, causing the valve body to be unable to close; 2. The cleaned impurities flow from the opening into the space between the scraper and the sealing plate. When the cleaning component rises, the sealing plate is driven up, causing water to flow out from the mesh plate, and the impurities remain between the scraper and the sealing plate. The impurities can be cleaned multiple times, so that the impurities are temporarily stored between the scraper and the sealing plate, and then the valve body is disassembled to clean the impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the cleaning component of the present invention being located at the top of the valve body.

[0017] Figure 2 This is a schematic diagram of the structure of the cleaning component of the present invention after being close to the scraper.

[0018] Figure 3 It is a schematic structural diagram of a cross-section of the cleaning component of the present invention.

[0019] Figure 4 It is a schematic diagram of the structure of the mounting ring and the arc plate of the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the scraper of the present invention when viewed from above.

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the scraper of the present invention.

[0022] Figure 7 It is a schematic structural diagram of the coordination between the arc plate and the arc handle of the present invention.

[0023] Figure numerals: 1. valve body; 2. valve core; 3. valve seat; 4. valve stem; 5. scraper; 51. opening; 52. spring; 53. mesh plate; 6. cleaning assembly; 61. mounting ring; 62. arc plate; 63. slide groove; 64. slider; 65. tension spring; 66. frustum; 67. arc groove; 68. guide rod; 69. push block; 610. sealing plate; 611. water outlet groove; 7. compression spring. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0025] like Figure 1-Figure 7 As shown, in the first embodiment of the present invention, a discharge valve includes a valve body 1, a valve core 2, a valve seat 3, a valve stem 4, a scraper 5 and a cleaning assembly 6.

[0026] When the valve is in use, the valve stem 4 moves upward to drive the valve core 2 to block the valve seat 3, so that the discharge valve is closed; the valve stem 4 moves downward to drive the valve core 2 to move downward to discharge the material. After the valve is discharged, as the water on the valve body 1 evaporates, impurities will be formed on the inner wall of the valve body 1. When the impurities reach a certain thickness, they may affect the opening or closing of the valve. In order to describe the position of the impurities on the valve body 1 in more detail, the position on the inner wall of the valve body 1 from the top of the valve body 1 to the scraper 5 is called A. Since the scraper 5 is in contact with the inner wall of the valve body 1, impurities are formed at position A.

[0027] In the initial position, the cleaning assembly 6 is located at the top of part A, and the scraper 5 is located at the bottom of part A. When cleaning the valve body 1, the cleaning assembly 6 is moved closer to the scraper 5 by rotating the valve stem 4. At this time, the cleaning assembly 6 scrapes off the impurities on part A, and then the valve stem 4 moves downward to open the valve.

[0028] Specifically, the valve stem 4 includes a threaded section, which extends from the top of the valve stem 4 to the connection between the valve stem 4 and the scraper 5. The top of the valve stem 4 is slidably connected to the valve core 2 up and down, and a compression spring 7 is connected between the valve stem 4 and the valve core 2.

[0029] The cleaning assembly 6 includes a mounting ring 61 and a plurality of arc plates 62. The mounting ring 61 is sleeved on the outside of the valve stem 4. The plurality of arc plates 62 are evenly distributed along the circumference of the mounting ring 61. The arc plates 62 can slide radially along the mounting ring 61. The edges of the arc plates 62 are adapted to the inner wall of the valve body 1. A sliding groove 63 is provided on the mounting ring 61. A sliding block 64 is provided on the arc plate 62. The sliding block 64 is slidably arranged in the sliding groove 63.

[0030] The cleaning assembly 6 also includes a tension spring 65 between the slider 64 and the slide groove 63. A round table 66 is slidably arranged at the axis of the mounting ring 61. The round table 66 is threadedly connected to the valve stem 4. A plurality of arc grooves 67 are evenly distributed on the outer periphery of the round table 66. One end of the arc plate 62 is slidably arranged in the arc groove 67. A guide rod 68 extending downward from the mounting ring 61 and penetrating the scraper 5 is abutted against the inner wall of the valve body 1. When the valve stem 4 rotates, the scraper 5 does not rotate, thereby providing a driving force for the relative rotation between the mounting ring 61 and the screw. The scraper 5 is installed on the valve stem 4 with upper and lower limits and can rotate relative to the valve stem 4.

[0031] In the initial position, the valve stem 4 pushes the valve core 2 to block the valve seat 3, the valve stem 4 pushes the compression spring 7 to compress, and the valve stem 4 moves upward to drive the round table 66 and the arc groove 67 to move upward. Since the arc plate 62 slides in the arc groove 67, the arc groove 67 will push the edge of the arc plate 62 to abut against the inner wall of the valve body 1 when it moves upward, and then the valve stem 4 is rotated. Since the round table 66 and the valve stem 4 are threadedly connected, the cleaning assembly 6 moves downward as a whole when the valve stem 4 rotates, and the arc plate 62 scrapes off the impurities on the inner wall of the valve body 1 until the arc plate 62 contacts the scraper 5. At this time, the arc plate 62 moves from the top of part A to the bottom. That is, the impurities on part A are cleaned through the cleaning component 6, and then the valve stem 4 is pulled down. When the valve core 2 is out of contact with the valve seat 3, that is, when the valve is opened, the arc plate 62 slides toward the center of the mounting ring 61 under the tension of the tension spring 65, and the liquid flows out from the gap between the arc plate 62 and the inner wall of the valve body 1. When the liquid is released, the valve stem 4 is first rotated to move the cleaning component 6 to the top of the valve stem 4. During this process, the arc plate 62 does not contact the inner wall of the valve body 1, so as to prevent the arc plate 62 from pushing the impurities remaining on the valve body 1 upward. The impurities eventually gather at the upper part of the valve body 1, causing the valve body 1 to be blocked.

[0032] In a specific embodiment of the present invention, adjacent arc plates 62 are alternately arranged up and down; when the arc plates 62 slide toward the middle of the mounting ring 61, the overlapping area between adjacent arc plates 62 gradually increases, and when the arc plates 62 move toward the inner wall of the mounting valve body 1, the overlapping area between the arc plates 62 gradually decreases, and when the edge of the arc plates 62 contacts the inner wall of the valve body 1, there is overlap between adjacent arc plates 62, that is, the edges of multiple arc plates 62 can enclose a complete circle, and when the arc plates 62 move downward, the inner wall of the valve body 1 can be completely cleaned.

[0033] In a further embodiment of the present invention, the thickness of the scraper 5 gradually decreases from the periphery to the middle so that the scraper 5 forms a basin-shaped structure, and the impurities on the A part of the valve body 1 are cleaned by the cleaning assembly 6 and fall onto the scraper 5. A plurality of openings 51 are evenly distributed along the circumference of the scraper 5 at the center of the scraper 5, and a mesh plate 53 for synchronously closing the plurality of openings 51 is installed on the scraper 5. A spring 52 for making the mesh plate 53 close to the opening 51 is installed between the mesh plate 53 and the opening 51. A water supply part is connected to the scraper 5, and the water supply part is a water pump (the water supply part is not shown in the figure). A push block 69 is installed at the bottom of the mounting ring 61, and a sealing plate 610 is also provided at the bottom of the guide rod 68.

[0034] During the process of the cleaning assembly 6 descending from the top to the bottom of the screw, the arc plate 62 is always in contact with the inner wall of the valve body 1 to clean the impurities on the inner wall of the valve body 1. When the cleaning assembly 6 descends to the bottom of the screw, a temporary storage space is formed between the cleaning assembly 6 and the scraper 5, and the scraped impurities are stored in the space. At the same time, the cleaning assembly 6 will drive the guide rod 68 to descend during the descent process. When the guide rod 68 descends, it pushes the mesh plate 53 out of contact with the opening 51, and the opening 51 is opened; when the guide rod 68 descends, the sealing plate connected to the bottom of the guide rod 68 610 descends synchronously, and a water storage space is formed between the sealing plate 610, the inner wall of the valve body 1, and the scraper 5. At this time, the water supply component supplies water to the scraper 5. The scraper 5 is provided with a plurality of water outlet grooves 611 connected with the water supply component. The end of the water outlet groove 611 is located at the edge of the top of the scraper 5. When the water supply component starts to supply water, the water flows from the edge of the scraper 5 to the middle and brings the impurities on the scraper 5 into the water storage space through the water flow. After supplying water for a period of time, the water supply component is closed. At this time, the impurities are stored in the water storage space, and there is still water in the water storage space.

[0035] The valve is opened by lowering the valve stem 4. When the valve stem 4 lowers, the compression spring 7 extends, and the valve stem 4 drives the cleaning assembly 6 and the scraper 5 to synchronously lower a certain distance so that the valve core 2 is away from the valve seat 3 to open the valve. During this process, the arc plate 62 always abuts against the inner wall of the valve body 1 to prevent too much liquid from entering the water storage space.

[0036] When the valve needs to be closed, first rotate the valve stem 4 to make the cleaning assembly 6 rise to the top of the screw. During the process of the cleaning assembly 6 rising from the bottom of the screw to the top of the screw, the arc plate 62 does not contact the inner wall of the valve body 1, and the liquid flows out from the gap between the arc plate 62 and the valve body 1. The valve stem 4 continues to rise to compress the compression spring 7 and then push the valve core 2 to close the valve seat 3. At this time, the tension spring 65 is stretched, and the arc plate 62 moves toward the inner wall of the valve body 1 and contacts the inner wall of the valve body 1. In preparation for the next cleaning of the inner wall of the valve body 1, the sealing plate 610 moves upward to gradually reduce the water storage space. The water in the water storage space flows out from the mesh plate 53, while the impurities remain in the water storage space. After multiple impurity removal operations, after a certain amount of impurities have accumulated in the water storage space, the operator can remove the sealing plate 610. In a specific embodiment , screws are connected between the sealing plate 610 and the guide rod 68, and the sealing plate 610 and the valve stem 4 are slidably and sealedly connected. The operator cleans the impurities by disassembling. During the impurity removal process, the impurities will not flow out with the slurry, thereby ensuring the quality of the slurry during the discharge process. In order to avoid that when the cleaning component 6 moves to the top of the valve body 1, part of the slurry is stored between the cleaning component 6 and the top of the valve body 1, a water outlet trough 611 is provided on the mounting ring 61 and the arc plate 62. When the valve body 1 is closed, the slurry flows out from the water outlet trough 611. At the same time, in order to avoid that the slurry flows out of the water outlet trough 611 and then flows into the water storage space, causing the slurry to fill the water storage space and causing the water in the water storage space to overflow and bring out the impurities, a blocking block opposite to the water outlet trough 611 can be provided on the scraper 5 to block the water outlet trough 611.

[0037] Working principle of the present invention: When cleaning impurities on the inner wall of the valve body 1, the valve stem 4 is rotated to move the cleaning assembly 6 toward the position of the scraper 5, and the impurities on the inner wall of the valve body 1 are cleaned through the arc plate 62 on the cleaning assembly 6. The cleaned impurities are stored between the cleaning assembly 6 and the scraper 5. When the cleaning assembly 6 contacts the scraper 5, the opening 51 on the scraper 5 opens, and water is filled between the cleaning assembly 6 and the scraper 5 to make the impurities fall into the water storage space between the scraper 5 and the sealing plate 610. When closing the valve, the valve stem 4 is rotated in the opposite direction to make the cleaning assembly 6 move upward first, and then push the valve stem 4 to move upward to When the valve is closed and the cleaning component 6 moves upward, the arc plate 62 and the valve body 1 are out of contact, which can prevent the valve body 1 from pushing impurities on the inner wall of the valve body 1 upward when it moves upward, causing the impurities to gather on the upper part of the valve body 1, resulting in the valve body 1 being unable to close. The liquid flows out from the gap between the arc plate 62 and the valve body 1 until the valve core 2 closes the valve body 1. The cleaning component 6 moves upward to move the sealing plate 610 upward and close to the scraper 5 to squeeze water from the mesh plate 53, so that impurities remain in the water storage space. After cleaning the impurities for several times, the operator can open the valve body 1 to clean the impurities.

[0038] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A discharge valve, comprising a valve body (1), a valve core (2), a valve seat (3) and a valve stem (4), characterized in that: The valve stem (4) is limited in upper and lower positions and elastically slides on the valve core (2); a scraper (5) and a cleaning assembly (6) are mounted on the valve stem (4); a guide rod (68) penetrating the bottom of the scraper (5) is connected to the cleaning assembly (6); a sealing plate (610) sealingly connected to the valve body (1) is connected to the bottom of the guide rod (68); and a water supply member is also connected to the scraper (5); The scraper (5) has an opening (51) and a mesh plate (53) for closing the opening (51) in the middle. The cleaning assembly (6) comprises a mounting ring (61) and a plurality of arc-shaped plates (62) that slide elastically in the radial direction of the mounting ring (61). A truncated table (66) that is threadedly connected to the valve stem (4) is slidably arranged at the axis of the mounting ring (61) up and down. The outer circumference of the truncated table (66) is evenly distributed with a plurality of arc-shaped grooves (67). One end of the arc-shaped plate (62) is slidably arranged in the arc-shaped groove (67). When the valve stem (4) rotates, , so that the cleaning component (6) moves toward the scraper (5) to clean the valve body (1) and push the mesh plate (53) down to open the opening (51), and the water supply component supplies water to flush the impurities on the scraper (5) onto the sealing plate (610); when the valve stem (4) descends and then rotates in the opposite direction, the round table (66) loses the thrust and slides upward to separate the arc plate (62) from the inner wall of the valve body (1), the mesh plate (53) loses the thrust to close the opening (51), and the sealing plate (610) moves upward to squeeze the water out of the mesh plate (53).

2. A discharge valve according to claim 1, characterized in that: The valve stem (4) and the valve core (2) are connected in an upward and downward sliding manner, and a compression spring (7) is connected between the top of the valve stem (4) and the valve core (2).

3. A discharge valve according to claim 1, characterized in that: The cleaning assembly (6) further comprises a slide groove (63) provided along the radial direction of the mounting ring (61); a slider (64) is provided on the arc-shaped plate (62); the slider (64) is slidably arranged in the slide groove (63); and a tension spring (65) is provided between the slider (64) and the slide groove (63).

4. A discharge valve according to claim 1, characterized in that: Adjacent arc plates (62) are alternately arranged up and down. When the arc plates (62) slide toward the middle of the mounting ring (61), the overlapping area between adjacent arc plates (62) gradually increases. When the arc plates (62) move toward the inner wall of the mounting valve body (1), the overlapping area between adjacent arc plates (62) gradually decreases.

5. A discharge valve according to claim 1, characterized in that: The thickness of the scraper (5) gradually decreases from the periphery to the middle so that the scraper (5) forms a basin-shaped structure, and when the water supply member supplies water to the scraper (5), the water flows down from the opening (51).

6. A discharge valve according to claim 1, characterized in that: A spring (52) is connected between the scraper (5) and the mesh plate (53), and a push block (69) is installed at the bottom of the mounting ring (61). When the mounting ring (61) descends, the push block (69) pushes the mesh plate (53) downward to open the opening (51).

7. A discharge valve according to claim 1, characterized in that: The scraper (5) is provided with a plurality of water outlet grooves (611) connected to the water supply member, and the water outlet ends of the water outlet grooves (611) are located at the edge of the top of the scraper (5).

8. A discharge valve according to claim 1, characterized in that: A water outlet groove (611) is provided on the mounting ring (61) and the arc-shaped plate (62), and a blocking block corresponding to the water outlet groove (611) can be provided on the scraper (5). When the valve body (1) is closed, the liquid on the top of the valve body (1) flows out from the water outlet groove (611).

9. A discharge valve according to any one of claims 1 to 8, characterized in that: Screws are connected between the sealing plate (610) and the guide rod (68), and the sealing plate (610) and the valve stem (4) are slidably and sealingly connected.

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