Low-leakage two-way valve for powder

Abstract

The invention discloses a low-leakage two-way valve for powder, relates to the technical field of two-way valves for powder, and aims at solving the problems that when an existing two-way valve for powder is closed, powder adhered between a valve element and a valve seat can form a gap between contact surfaces, meanwhile, the valve element can be possibly abraded, the sealing effect can be affected, and leakage is caused. The air storage bag is arranged in the valve body, when the valve is closed, the air storage bag is squeezed at the same time, air flow in the air storage bag can be led to the purging assembly and blown to the inner walls of the rubber sealing valve element and the valve seat through the purging assembly, and the contact face of the rubber sealing valve element and the valve seat is purged; therefore, the smoothness and tightness of the contact surface are improved when the two-way valve is in contact, the sealing effect is improved, leakage is prevented, meanwhile, the contact surface is cleaned, abrasion of powder to the rubber sealing valve element during sealing extrusion can be reduced, the sealing performance is guaranteed conveniently, and the service life of the two-way valve is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of two-way valves for powder materials, in particular to a low-leakage two-way valve for powder materials. Background Art

[0002] In many production processes, accurate control of powders is essential. For example, in industries such as food processing and chemical synthesis, accurate powder flow control is one of the key factors to ensure product quality. Leakage of the two-way valve will cause unstable powder flow, thus affecting the quality and consistency of the product.

[0003] When the sealing valve core is inserted into the valve seat, powder will remain on the contact surface between the valve core and the valve seat. The powder is mixed between the valve core and the valve seat, increasing the roughness between the valve core and the valve seat. The increase in roughness will cause the valve core and the valve seat to not fit completely, and a gap will appear between them. When the valve is closed, these gaps will become leakage channels, causing the powder that should have been cut off to leak, affecting the sealing effect of the two-way valve. The sealing of the valve is achieved by the sealing materials on the valve core and the valve seat. Generally, rubber sealing materials are used. When the powder adheres to the valve core and contacts the sealing material, it may cause wear or chemical corrosion to the sealing material. If this continues, the valve core with worn surface will also affect the sealing of the two-way valve.

[0004] In view of the above problems, a low leakage two-way valve for powder is proposed. Summary of the invention

[0005] The object of the present invention is to provide a low leakage two-way valve for powder materials, which solves the problem in the background art that the powder materials adhering between the valve core and the valve seat will affect the sealing effect.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a low-leakage two-way valve for powder materials, comprising a two-way valve body, the top of the two-way valve body is fixedly connected to a supporting shell, one side of the two-way valve body is fixedly connected to a feed pipe, and the end of the feed pipe is connected to a feed cavity, and the feed cavity is opened inside the two-way valve body, the other side of the two-way valve body is fixedly connected to a discharge pipe, and the end of the discharge pipe is connected to a discharge cavity, and the discharge cavity is opened inside the two-way valve body, and the valve is also arranged inside the two-way valve body. A switch assembly, the valve switch assembly includes a valve seat located in the middle position between the feed chamber and the discharge chamber, and the valve seat and the two-way valve body are integrated, the valve switch assembly also includes a gasket, and the gasket is fixedly nested in the top of the two-way valve body, the gasket is internally plugged and connected with a rubber sealing valve core, and the top of the rubber sealing valve core is fixedly connected with a hydraulic telescopic rod, the outside of the hydraulic telescopic rod is nested with a first spring, and the top of the first spring is fixedly connected to the supporting shell, and the bottom of the first spring is fixedly connected to the rubber sealing valve core.

[0007] Preferably, an air storage assembly is provided inside the supporting shell, and the air storage assembly includes an air dividing ring, and the air dividing ring is nested inside the valve seat, two groups of air supply pipes are symmetrically provided on the top of the air dividing ring, and the air supply pipes are nested on the inner wall of the two-way valve body, and the air supply pipes are communicated with the air dividing ring, the top of the air supply pipes is fixedly connected with an air storage bag, and the air supply pipes are communicated with the air storage bag, and the air storage bag is nested outside the first spring, the bottom of the air storage bag is fixedly connected to the supporting shell, and the top of the air storage bag is fixedly connected with an exhaust pressure plate, and the exhaust pressure plate is fixedly nested on the outside of the hydraulic telescopic rod, and moves up and down with the hydraulic telescopic rod.

[0008] Preferably, a material passing through hole is provided inside the valve seat, and the material passing through hole is communicated with the material discharge cavity, and the inner diameter of the material passing through hole is consistent with the outer diameter of the thickest part of the rubber sealing valve core.

[0009] Preferably, the top of the feed through hole is connected to a feed opening, and the feed opening is also opened inside the valve seat, the opening size of the feed opening gradually increases from bottom to top, and the feed opening is connected to the feed chamber.

[0010] Preferably, a limiting slider is fixedly connected to the outer wall of the air bag at half the height, and four limiting sliders are arranged at equal intervals about the outer wall of the air bag, and the limiting slider is T-shaped, the outer sliding connection of the limiting slider is connected to a limiting groove, and the limiting groove is opened on the inner wall of the supporting shell.

[0011] Preferably, a through hole for passing a pipe is opened on the side of the exhaust pressure plate, and an intake pipe is nested inside the through hole, and the intake pipe and the exhaust pressure plate are connected in a fixed manner, and a one-way valve is installed inside the intake pipe.

[0012] Preferably, the bottom end of the air intake pipe is connected to the air storage bag, and the top end of the air intake pipe is fixedly connected with an air intake port, the air intake port is connected to the air intake pipe, and the shape of the air intake port is set to be a trumpet shape with an upper opening larger than a lower opening, and a filter is fixedly connected to the inside of the air intake port.

[0013] Preferably, a purge assembly is fixedly connected to the inner side of the air dividing ring, and the purge assembly includes a connector, and the connector and the air dividing ring are connected in a fixed manner, and the connector is in communication with the air dividing ring.

[0014] Preferably, the shape of the connectors is set to be flat, and the connectors are distributed in a ring array with respect to the inner side of the gas dividing ring.

[0015] Preferably, a purge port is fixedly connected to the top of the connector, and the cross-sectional shape of the purge port is set to be an isosceles trapezoid with the upper end smaller than the lower end, the upper end face of the purge port is flush with the inner wall surface of the material passing opening, and the opening direction of the purge port points to the rubber sealing valve core.

[0016] Preferably, a sealing plug is inserted into the inside of the purge port, and the bottom of the sealing plug is fixedly connected to a second spring, the bottom end of the second spring is fixedly connected to a fixing rod, and the fixing rod is fixedly connected to the inside of the connecting head for fixing the bottom end of the second spring.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The low leakage two-way valve for powder provided by the present invention is provided with an air storage bag inside the valve body, and the air storage bag can exhaust and take in air as the valve is closed and opened. When the valve is closed, the air storage bag is squeezed at the same time, and the air flow inside the air storage bag can be directed to the purge component, and then blown to the rubber sealing valve core and the inner wall of the valve seat through the purge component, so as to purge the contact surface between the rubber sealing valve core and the valve seat, thereby facilitating the improvement of the smoothness and tightness of the contact surface when the two are in contact, thereby facilitating the prevention of loose sealing due to existing gaps, thereby causing leakage of powder, and cleaning the contact surface at the same time, which can also reduce the wear of the rubber sealing valve core by the powder when the seal is squeezed, thereby ensuring the sealing performance and improving the service life of the two-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic cross-sectional structure diagram of the present invention in an overall opened state;

[0020] Figure 2It is a schematic cross-sectional structure diagram of the present invention in an overall closed state;

[0021] Figure 3 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the valve body part of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the gas storage component part of the present invention;

[0024] Figure 6 It is a schematic cross-sectional structure diagram of the purge assembly part of the present invention;

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the valve switch component part of the present invention.

[0026] In the figure: 1, two-way valve body; 2, valve switch assembly; 3, support shell; 4, air storage assembly; 5, purge assembly; 6, feed chamber; 7, feed pipe; 8, discharge chamber; 9, discharge pipe; 201, gasket; 202, rubber sealing valve core; 203, hydraulic telescopic rod; 204, first spring; 205, valve seat; 206, feed opening; 207, feed through hole; 401, limit slide; 402, limit slider; 403, air storage bag; 404, air supply pipe; 405, air distributor ring; 406, exhaust pressure plate; 407, pipe through hole; 408, air inlet pipe; 409, one-way valve; 410, filter; 411, air inlet; 501, connector; 502, purge port; 503, sealing plug; 504, second spring; 505, fixing rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0029] Combination Figure 1-Figure 7A low leakage two-way valve for powder materials of the present invention comprises a two-way valve body 1, a support shell 3 is fixedly connected to the top of the two-way valve body 1, a feed pipe 7 is fixedly connected to one side of the two-way valve body 1, and the end of the feed pipe 7 is connected to a feed cavity 6, and the feed cavity 6 is opened inside the two-way valve body 1, a discharge pipe 9 is fixedly connected to the other side of the two-way valve body 1, and the end of the discharge pipe 9 is connected to a discharge cavity 8, and the discharge cavity 8 is opened inside the two-way valve body 1, and a valve switch assembly 2 is also arranged inside the two-way valve body 1, and the valve switch assembly 2 includes a valve located between the feed cavity 6 and the discharge cavity 8. A valve seat 205 is located in the middle of the material chamber 8, and the valve seat 205 is integrated with the two-way valve body 1. The valve switch assembly 2 also includes a gasket 201, and the gasket 201 is fixedly nested in the top of the two-way valve body 1. The inside of the gasket 201 is plugged and connected with a rubber sealing valve core 202, and the top of the rubber sealing valve core 202 is fixedly connected with a hydraulic telescopic rod 203, and the outside of the hydraulic telescopic rod 203 is nested with a first spring 204, and the top of the first spring 204 is fixedly connected to the support shell 3, and the bottom of the first spring 204 is fixedly connected to the rubber sealing valve core 202.

[0030] A feed through hole 207 is provided inside the valve seat 205, and the feed through hole 207 is communicated with the discharge chamber 8. The inner diameter of the feed through hole 207 is consistent with the outer diameter of the thickest part of the rubber sealing valve core 202. The top of the feed through hole 207 is connected to a feed opening 206, and the feed opening 206 is also provided inside the valve seat 205. The opening size of the feed opening 206 gradually increases from bottom to top, and the feed opening 206 is communicated with the feed chamber 6.

[0031] When the valve is opened, the output end of the hydraulic telescopic rod 203 moves upward with the rubber sealing valve core 202, so that it is inserted into the annular gasket 201. At this time, the feeding hole 207 is in an open state, and the powder in the feeding chamber 6 can enter the discharge chamber 8 through the feeding hole 207. When the valve needs to be closed, the hydraulic telescopic rod 203 is started, and the output end of 302 moves downward with the rubber sealing valve core 202. At the same time, the energy in the compressed first spring 204 is released, which assists the rubber sealing valve core 202 to move downward quickly, insert the rubber sealing valve core 202 into the feeding hole 207, and block the feeding hole 207, so that the powder in the feeding chamber 6 can no longer enter the discharge chamber 8 through the feeding hole 207.

[0032] An air storage component 4 is arranged inside the supporting shell 3, and the air storage component 4 includes an air dividing ring 405, and the air dividing ring 405 is nested inside the valve seat 205, and two groups of air supply pipes 404 are symmetrically arranged on the top of the air dividing ring 405, and the air supply pipes 404 are nested on the inner wall of the two-way valve body 1, and the air supply pipes 404 are communicated with the air dividing ring 405, and the top of the air supply pipes 404 is fixedly connected with an air storage bag 403, and the air supply pipes 404 are communicated with the air storage bag 403, and the air storage bag 403 is nested outside the first spring 204, the bottom of the air storage bag 403 is fixedly connected to the supporting shell 3, and the top of the air storage bag 403 is fixedly connected with an exhaust pressure plate 406, and the exhaust pressure plate 406 is fixedly nested on the outside of the hydraulic telescopic rod 203, and moves up and down with the hydraulic telescopic rod 203, and a limited position slide is fixedly connected to the outer wall of the air storage bag 403 at half the height Block 402, and four limit sliders 402 are evenly spaced about the outer wall of the air storage bag 403, and the shape of the limit slider 402 is T-shaped, the outer sliding connection of the limit slider 402 is a limit slide groove 401, and the limit slide groove 401 is opened on the inner wall of the supporting shell 3, a through-tube through hole 407 is opened on the side of the exhaust pressure plate 406, and an air intake pipe 408 is nested inside the through-tube through hole 407, and the connection mode of the air intake pipe 408 and the exhaust pressure plate 406 is a fixed connection, a one-way valve 409 is installed inside the air intake pipe 408, the bottom end of the air intake pipe 408 is connected to the air storage bag 403, and the top end of the air intake pipe 408 is fixedly connected with an air inlet 411, the air inlet 411 is connected to the air intake pipe 408, and the shape of the air inlet 411 is set to be a trumpet shape with an upper opening larger than a lower opening, and a filter 410 is fixedly connected inside the air inlet 411.

[0033] When the valve is closed, the hydraulic telescopic rod 205 moves downward with the rubber sealing valve core 202 to be inserted into the material passing hole 207, and the hydraulic telescopic rod 203 also moves downward with the exhaust pressure plate 406. The exhaust pressure plate 406 squeezes the air storage bag 403 at its bottom, so that the gas inside it flows to the air distribution ring 405 through the air delivery pipe 404, and finally blows the surface of the rubber sealing valve core 202 through the purge component 5 to clean it. The one-way valve 409 inside the intake pipe 408 can prevent the gas from flowing out through the intake pipe 408. When the valve is opened, the hydraulic telescopic rod 203 also rises with the exhaust pressure plate 406. The bottom surface of 06 is fixed and will not rise with it. When its top surface rises with the exhaust pressure plate 406, the air storage bag 403 is stretched and restricted by the limit slider 402 and the limit slide groove 401. The side is not easy to sink inward, thereby forming a negative pressure state inside the air storage bag 403, so that external gas can enter the interior of the air storage bag 403 through the air inlet 411 and the air inlet pipe 408 for storage. When the valve is closed next time, it is discharged downward through the air supply pipe 404 for blowing, forming a cycle, and each time the valve is opened and closed, the gas is sucked in and discharged, and the contact surface between the valve core and the valve seat 205 can be blown and cleaned each time the valve is closed.

[0034] The inner side of the air dividing ring 405 is fixedly connected with a purge assembly 5, and the purge assembly 5 includes a connector 501, and the connection between the connector 501 and the air dividing ring 405 is a fixed connection, and the connector 501 is connected to the air dividing ring 405, the shape of the connector 501 is set to be flat, and the connector 501 is distributed in a circular array with respect to the inner side of the air dividing ring 405, and the top of the connector 501 is fixedly connected with a purge port 502, and the cross-sectional shape of the purge port 502 is set to be smaller than the upper end. The lower end is an isosceles trapezoid, the upper end face of the purge port 502 is flush with the inner wall surface of the feed opening 206, and the opening direction of the purge port 502 points to the rubber sealing valve core 202, and a sealing plug 503 is inserted into the inside of the purge port 502, and the bottom of the sealing plug 503 is fixedly connected to the second spring 504, the bottom end of the second spring 504 is fixedly connected to a fixing rod 505, and the fixing rod 505 is fixedly connected to the inside of the connector 501, for fixing the bottom end of the second spring 504.

[0035] When the valve is closed and the air storage bag 403 is squeezed, the air flow can pass through the air dividing ring 405 to the connecting head 501 and the purge port 502, and at the same time push the sealing plug 503 outward to open the end of the purge port 502. The opening size of the purge port 502 gradually shrinks, which has an accelerating effect on the air flow passing through, thereby increasing the strength of the purge air flow and improving the cleaning effect. The connecting head 501 and the connecting head 501 are vertically flat, which can guide the blown air flow and be diverted by the sealing plug 503 at its end, so that the air flow is divided into an upper and a lower stream to purge the surface of the rubber sealing valve core 202. The upper stream of air can remove the powder on the surface of the rubber sealing valve core 202 The upper airflow is blown back to the feed chamber 6, and the lower airflow can sweep the powder on the surface of the rubber sealing valve core 202 downward into the discharge chamber 8. At the same time, the lower airflow can also sweep the inner wall of the material through hole 207 when passing through the reflected flow of the rubber sealing valve core 202 and passing through the inside of the material through hole 207, thereby facilitating the purging and cleaning of the contact surface between the valve core and the valve seat 205, thereby facilitating the smoothness of the contact surface, thereby improving the sealing effect and preventing dust leakage. When the valve is opened and there is no airflow flowing out from the inside of the connecting head 501, under the action of the second spring 504, the sealing plug 503 is pulled back to the inside of the purge port 502 to seal it to prevent subsequent powder from entering the inside of the connecting head 501.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low leakage two-way valve for powder, characterized in that: The invention comprises a two-way valve body (1), the top of which is fixedly connected to a supporting shell (3), one side of which is fixedly connected to a feed pipe (7), and the end of the feed pipe (7) is connected to a feed cavity (6), and the feed cavity (6) is opened inside the two-way valve body (1), the other side of which is fixedly connected to a discharge pipe (9), and the end of the discharge pipe (9) is connected to a discharge cavity (8), and the discharge cavity (8) is opened inside the two-way valve body (1), and a valve switch assembly (2) is also arranged inside the two-way valve body (1), and the valve switch assembly (2) comprises a valve located in the feed cavity (6) and the discharge cavity (8). A valve seat (205) is provided in the middle position, and the valve seat (205) and the two-way valve body (1) are integrated, the valve switch assembly (2) further comprises a gasket (201), and the gasket (201) is fixedly nested in the top of the two-way valve body (1), the gasket (201) is plugged and connected with a rubber sealing valve core (202) inside, and the top of the rubber sealing valve core (202) is fixedly connected with a hydraulic telescopic rod (203), the outside of the hydraulic telescopic rod (203) is nested with a first spring (204), and the top of the first spring (204) is fixedly connected to the support shell (3), and the bottom of the first spring (204) is fixedly connected to the rubber sealing valve core (202); An air storage assembly (4) is arranged inside the supporting shell (3), and the air storage assembly (4) includes an air dividing ring (405), and the air dividing ring (405) is nested inside the valve seat (205), and two groups of air delivery pipes (404) are symmetrically arranged on the top of the air dividing ring (405), and the air delivery pipes (404) are nested on the inner wall of the two-way valve body (1), and the air delivery pipes (404) are connected to the air dividing ring (405), and the top of the air delivery pipe (404) is fixedly connected to the valve seat (205). An air storage bag (403) is provided, and an air delivery pipe (404) is connected to the air storage bag (403), and the air storage bag (403) is nested outside the first spring (204), the bottom of the air storage bag (403) is fixedly connected to the supporting shell (3), and the top of the air storage bag (403) is fixedly connected to an exhaust pressure plate (406), and the exhaust pressure plate (406) is fixedly nested outside the hydraulic telescopic rod (203) and moves up and down with the hydraulic telescopic rod (203).

2. A low leakage two-way valve for powder materials according to claim 1, characterized in that: A material passing through hole (207) is provided inside the valve seat (205), and the material passing through hole (207) is connected to the material discharge chamber (8), and the inner diameter of the material passing through hole (207) is consistent with the outer diameter of the thickest part of the rubber sealing valve core (202).

3. A low leakage two-way valve for powder materials according to claim 2, characterized in that: The top of the feed through hole (207) is connected to a feed opening (206), and the feed opening (206) is also opened inside the valve seat (205). The opening size of the feed opening (206) gradually increases from bottom to top, and the feed opening (206) is connected to the feed chamber (6).

4. A low leakage two-way valve for powder materials according to claim 1, characterized in that: A limiting slider (402) is fixedly connected to the outer wall of the air storage bag (403) at half the height, and four limiting sliders (402) are arranged at equal intervals with respect to the outer wall of the air storage bag (403), and the limiting slider (402) is arranged in a T-shaped shape. The outer sliding connection of the limiting slider (402) is connected to a limiting slide groove (401), and the limiting slide groove (401) is opened on the inner wall of the supporting shell (3).

5. A low leakage two-way valve for powder materials according to claim 1, characterized in that: A through hole (407) for passing a pipe is provided on the side of the exhaust pressure plate (406), and an intake pipe (408) is nested inside the through hole (407). The intake pipe (408) and the exhaust pressure plate (406) are connected in a fixed manner, and a one-way valve (409) is installed inside the intake pipe (408).

6. A low leakage two-way valve for powder materials according to claim 5, characterized in that: The bottom end of the air intake pipe (408) is connected to the air storage bag (403), and the top end of the air intake pipe (408) is fixedly connected to an air intake port (411), the air intake port (411) is connected to the air intake pipe (408), and the shape of the air intake port (411) is set to be a trumpet shape with an upper opening larger than a lower opening, and a filter screen (410) is fixedly connected inside the air intake port (411).

7. A low leakage two-way valve for powder materials according to claim 1, characterized in that: A purge assembly (5) is fixedly connected to the inner side of the gas separation ring (405), and the purge assembly (5) comprises a connector (501), and the connection between the connector (501) and the gas separation ring (405) is a fixed connection, and the connector (501) and the gas separation ring (405) are in communication.

8. A low leakage two-way valve for powder materials according to claim 7, characterized in that: The shape of the connector (501) is set to be flat, and the connectors (501) are distributed in a ring array with respect to the inner side of the gas dividing ring (405).

9. A low leakage two-way valve for powder materials according to claim 7, characterized in that: The top end of the connector (501) is fixedly connected with a purge port (502), and the cross-sectional shape of the purge port (502) is set to be an isosceles trapezoid with the upper end smaller than the lower end, the upper end surface of the purge port (502) is flush with the inner wall surface of the feed opening (206), and the opening direction of the purge port (502) points to the rubber sealing valve core (202).

10. A low leakage two-way valve for powder materials according to claim 7, characterized in that: A sealing plug (503) is inserted into the interior of the purge port (502), and a second spring (504) is fixedly connected to the bottom of the sealing plug (503), and a fixing rod (505) is fixedly connected to the bottom end of the second spring (504), and the fixing rod (505) is fixedly connected to the interior of the connector (501) for fixing the bottom end of the second spring (504).

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