A built-in pneumatic straight-through valve

Abstract

The present invention discloses a built-in pneumatic through valve, which belongs to the field of valve technology, and includes a valve body, a valve core and a piston assembly. The valve body is provided with a medium delivery chamber and a valve core power chamber, and the medium delivery chamber is arranged outside the valve core power chamber. The valve core is located inside a valve port and is used to block the valve port. The piston assembly is installed in the valve core power chamber and is used to push the valve core and control the opening and closing between the valve core and the valve port to realize the opening and closing of the medium delivery channel. The port of the medium delivery chamber close to the valve core does not intersect or partially intersects with the valve core on the extension line, so that the valve core will not block the port of the medium delivery chamber. The medium delivery channel is set separately from the valve core power chamber, and the medium will not flow into the valve core power chamber. The medium will only contact the valve core and will not contact the piston assembly that provides power, thereby reducing the influence of the medium on the piston assembly and objects such as the sealing ring used for sealing, and can ensure the sealing performance of the valve core power chamber and prevent medium leakage.

Description

Technical Field

[0001] The invention relates to the technical field of valve covers, and in particular to a built-in pneumatic through valve. Background Art

[0002] The valve cover is an important control part in the pipeline fluid / gas delivery system, with functions such as diversion, shutoff, throttling, non-return, diversion or overflow pressure relief. The ball valve is a kind of valve cover. The structure of the ball valve generally includes a valve body, a valve core, a valve cover, a valve stem and a driver that controls the rotation of the valve stem. The rotation of the valve core is controlled by the rotation of the valve stem, thereby realizing the opening or closing of the valve cover. When the valve cover is opened, the diversion medium will pass through the inside of the valve core, that is, the cavity where the valve core is located and the diversion medium cavity are shared in the same cavity, so that high-temperature media (such as high-temperature liquids or gases) or highly corrosive media will cause damage to the valve core and the sealing ring used for the valve core sealing installation. After long-term use, the sealing strength and anti-leakage effect of the valve cover will be reduced. Summary of the invention

[0003] The main purpose of the present invention is to provide a built-in pneumatic through-valve, aiming to reduce the influence of the guide medium on the sealing performance of the valve core and realize the pneumatic control of the valve core.

[0004] The present invention provides a built-in pneumatic through valve, comprising:

[0005] A valve body, wherein a medium delivery chamber and a valve core power chamber are provided in the valve body, wherein the medium delivery chamber is arranged outside the valve core power chamber, and wherein two valve ports are provided on the valve body, wherein the two valve ports are respectively located at two ends of the medium delivery chamber and are connected to form a medium delivery channel;

[0006] A valve core is located inside the valve port and is used to block the valve port; a port of the medium delivery cavity close to the valve core does not intersect or partially intersects with the valve core on an extended line;

[0007] The piston assembly is installed in the valve core power chamber and is used to push the valve core and control the opening and closing between the valve core and the valve port to realize the opening and closing of the medium delivery channel; the piston assembly is a pneumatic piston assembly, and the valve body is provided with an air hole, and the air hole is connected to an air compression device to provide power for the piston assembly; the power output end of the piston assembly is connected to the valve core, and the two ends of the valve core power chamber facing the two valve ports are provided with sealing structures to prevent the medium from entering the valve core power chamber.

[0008] Preferably, a valve cover is installed in the valve port close to the valve core, and the valve cover is provided with a valve cover opening adapted to the valve core.

[0009] Preferably, the valve core includes a first plug for blocking the valve cover opening opposite to it and a second plug for blocking one end of the valve core power chamber, the second plug is sealingly installed in the valve core power chamber, and the sealing structure is formed at one end of the valve core power chamber; the first plug extends out of the valve core power chamber and faces the valve cover opening, the first plug is located between the valve cover opening and the medium delivery chamber, and the port of the medium delivery chamber close to the first plug does not intersect or partially intersects with the first plug on the extension line.

[0010] Preferably, the sealing structure at the other end of the valve core power chamber is composed of a cover, the cover is of a conical flow-guiding design, and the thin end of the cover faces one of the valve ports.

[0011] Preferably, the piston assembly includes a core piston, a balance piston and a gear shaft located between the core piston and the balance piston, the core piston includes a first rack portion and a first piston head, the balance piston includes a second rack portion and a second piston head, the first rack portion and the second rack portion are respectively located on opposite sides of the gear shaft, and the racks on the first rack portion and the second rack portion are meshed with the teeth on the gear shaft to form a gear transmission mechanism, the output end of the core piston is connected to the valve core; the first piston head is connected to the first rack portion, the second piston head is connected to the second rack portion, the first piston head and the second piston head are respectively relatively sealed and installed in the valve core power chamber to form a first sub-chamber; the cavity position in the valve core power chamber located outside the first sub-chamber and adjacent to the second piston head is the second sub-chamber; the cavity position in the valve core power chamber located outside the first sub-chamber and adjacent to the first piston head is the third sub-chamber; the air hole is divided into a first air hole connected to the first sub-chamber and a second air hole connected to the second sub-chamber.

[0012] Preferably, the valve core includes a connecting head connected to the core piston, a connecting hole is provided on the first piston head, the connecting head passes through the connecting hole and a slot is provided at the end passing through the connecting hole, a buckle is installed in the slot to connect and fix the connecting head to the core piston.

[0013] Preferably, the valve body is provided with a mechanical drive chamber vertically connected to the valve core power chamber, and a valve stem is sealed and installed in the mechanical drive chamber, one end of the valve stem extends out of the valve body, and the other end is axially connected to the gear shaft.

[0014] Preferably, the end of the valve stem extending out of the valve body is driven to rotate by a motor.

[0015] Preferably, the medium delivery chamber is provided with a plurality of channels, which are distributed around the outside of the valve core power chamber.

[0016] Preferably, the cross section of the medium delivery cavity is arc-shaped.

[0017] The beneficial effects of the present invention are:

[0018] The present invention proposes a built-in pneumatic through valve, which includes a valve body, a valve core and a piston assembly. The valve body is provided with a medium delivery chamber and a valve core power chamber. The medium delivery chamber is arranged outside the valve core power chamber. The valve body is provided with two valve ports, which are respectively located at two ends of the medium delivery chamber and connected to form a medium delivery channel. The valve core is located inside a valve port and is used to block the valve port. The piston assembly is installed in the valve core power chamber and is used to push the valve core to control the opening and closing between the valve core and the valve port to realize the opening and closing of the medium delivery channel. The port of the medium delivery chamber close to the valve core does not intersect or partially intersects with the valve core on the extension line, so that the valve core does not block the port of the medium delivery chamber. When the valve core is close to the valve port, the valve port is blocked by the valve core, and the valve port is closed, thereby preventing the medium from passing through the medium delivery channel; when the valve core is pushed to a position away from the valve port, the valve port is opened, and the medium flows into the medium delivery chamber from the gap between the valve core and the valve port, and flows out from the valve port at the other end, and the medium passes through the medium delivery channel.

[0019] The piston assembly is a pneumatic piston assembly. The valve body is provided with an air hole, which is connected to an air compressor to provide power for the piston assembly. The power output end of the piston assembly is connected to the valve core, and the two ends of the valve core power cavity facing the two valve ports are provided with sealing structures to prevent the medium from entering the valve core power cavity. The piston assembly is powered by an air compressor, and the valve core is driven by the piston assembly to move toward the valve core or away from the valve core, and the opening and closing between the valve core and the valve port are controlled to realize the opening and closing of the medium conveying channel. Pneumatic control has the advantages of low cost, easy maintenance, low risk, and can be used in high temperature environments.

[0020] The present invention sets the medium delivery channel and the valve core power chamber separately, the medium will not flow into the valve core power chamber, the medium will only contact the valve core, and will not contact the piston assembly providing power, thereby 1) reducing the influence of the medium on the piston assembly and objects such as the sealing ring used for sealing, and can ensure the sealing performance of the valve core power chamber and prevent medium leakage; 2) it is suitable for high-temperature media and corrosive media, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the built-in pneumatic through valve of the present invention in a transverse section.

[0022] Figure 2 It is a longitudinal cross-sectional view of the built-in pneumatic through valve of the present invention.

[0023] Figure 3 for Figure 2 Cross-section view along the AA direction.

[0024] Figure 4 for Figure 2 Cross-sectional view along the BB direction.

[0025] Figure 5 for Figure 2 Cross-sectional view along the CC direction.

[0026] Figure 6 for Figure 2 Cross-sectional view along the DD direction.

[0027] Figure 7 The figure is a gas flow diagram in the valve core power chamber when the built-in pneumatic through valve of the present invention is opened.

[0028] Figure 8 The figure is a gas flow diagram in the valve core power chamber when the built-in pneumatic through valve of the present invention is closed.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout identify the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limitations of the present invention. Accordingly, the illustrative embodiments shown in the accompanying drawings may be changed in various ways. Therefore, the illustrative embodiments are not limited to the specific configurations in the accompanying drawings and may be changed to have various shapes and / or arrangements.

[0032] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium, and a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] Reference Figures 1 to 8 , an embodiment of a built-in pneumatic through valve of the present invention is proposed:

[0037] A built-in pneumatic through-valve includes a valve body 10, a valve core 20 and a piston assembly. The valve body 10 is provided with a medium delivery chamber 12 and a valve core power chamber 11. The medium delivery chamber 12 is arranged outside the valve core power chamber 11. The valve body 10 is provided with two valve ports 13. The two valve ports 13 are respectively located at the two ends of the medium delivery chamber 12 and are connected to form a medium delivery channel. The valve core 20 is located inside a valve port 13 and is used to block the valve port 13. The piston assembly is installed in the valve core power chamber 11 and is used to push the valve core 20 to control the opening and closing between the valve core 20 and the valve port 13 to realize the opening and closing of the medium delivery channel. The port of the medium delivery chamber 12 close to the valve core 20 does not intersect or partially intersects with the valve core 20 on the extension line, so that the valve core 20 will not block the port of the medium delivery chamber 12. When the valve core 20 is close to the valve port 13, the valve core 20 blocks the valve port 13, and the valve port 13 is closed, thereby preventing the medium from passing through the medium delivery channel; when the valve core 20 is pushed to a position away from the valve port 13, the valve port 13 opens, and the medium flows into the medium delivery chamber 12 from the gap between the valve core 20 and the valve port 13, and flows out from the valve port 13 at the other end, and the medium passes through the medium delivery channel.

[0038] The piston assembly is a pneumatic piston assembly. The valve body 10 is provided with an air hole, which is connected to an air compression device to provide power for the piston assembly. The power output end of the piston assembly is connected to the valve core 20, and the two ends of the valve core power chamber 11 facing the two valve ports 13 are provided with a sealing structure to prevent the medium from entering the valve core power chamber 11. The piston assembly is powered by an air compression device, and the valve core 20 is driven by the piston assembly to move toward the valve core 20 or away from the valve core 20, and the opening and closing between the valve core 20 and the valve port 13 are controlled to realize the opening and closing of the medium conveying channel. Pneumatic control has the advantages of low cost, easy maintenance, low risk, and can be used in high temperature environments.

[0039] The medium delivery channel is set separately from the valve core power chamber 11, and the medium will not flow into the valve core power chamber 11. The medium will only contact the valve core 20 and will not contact the piston assembly that provides power, thereby reducing the influence of the medium on the piston assembly and objects such as the sealing ring used for sealing, and can ensure the sealing performance of the valve core power chamber 11 to prevent medium leakage. The built-in pneumatic through valve is suitable for high-temperature media and corrosive media and has a wide range of applications.

[0040] like Figure 1 and Figure 3-6 As shown, the medium delivery chamber 12 and the valve core power chamber 11 are arranged in a straight line, and the medium delivery chamber 12 and the valve core power chamber 11 are relatively parallel. The cross section of the valve core power chamber 11 is circular, and the cross section of the medium delivery chamber 12 is arc-shaped. Two medium delivery chambers 12 are arranged, which are distributed around the two opposite outer sides of the valve core power chamber 11. The space design is ingenious.

[0041] Because the valve ports on valve bodies 10 of different specifications have different sizes, in order to cooperate with valve cores 20 of uniform size, the size of the valve ports needs to match the valve cores 20. However, due to the manufacturing process of the valve bodies 10, it is difficult to unify the sizes of the valve ports of valve bodies 10 of different specifications. Therefore, in this embodiment, a valve cover 30 is provided in the valve port to solve the size problem of the valve port.

[0042] like Figure 1 and Figure 2 As shown, a valve cover 30 is installed in the valve port 13 near the valve core 20, and a valve cover opening 31 adapted to the valve core 20 is provided on the valve cover 30. The valve cover opening 31 here is equivalent to the valve port 13 mentioned above, and the medium delivery channel is opened by blocking or moving the valve core 20 away from the valve cover opening 31 (such as Figure 7 as shown), close (as shown Figure 8 The manufacturing process of the separate valve cover 30 is simple. By installing the matching valve cover 30 on the valve ports 13 of different sizes and setting the valve cover port 31 of the valve cover 30 to match the valve core 20, the above problem is solved.

[0043] like Figure 1 As shown, the valve core 20 includes a first plug 21 for plugging the valve cover opening 31 opposite thereto and a second plug 22 for plugging one end of the valve core power chamber 11. The second plug 22 is installed in the valve core power chamber 11 through a sealing ring to form a sealing structure at one end of the valve core power chamber 11. The sealing structure at the other end of the valve core power chamber 11 is composed of a cover 14, which is designed to be a conical flow guide. The thin end of the cover 14 faces the valve port 13, which is convenient for the introduction or export of the medium.

[0044] The first plug 21 extends out of the valve core power chamber 11 and faces the valve cover opening 31. The first plug 21 is located between the valve cover opening 31 and the medium delivery chamber 12. The port of the medium delivery chamber 12 close to the first plug 21 does not intersect with the first plug 21 on the extension line, that is, the first plug 21 will not block the port of the medium delivery chamber 12.

[0045] The piston assembly includes a core piston 50, a balancing piston 60, and a gear shaft 40 located between the core piston 50 and the balancing piston 60. The core piston 50 includes a first rack portion 51 and a first piston head 52. The balancing piston 60 includes a second rack portion 61 and a second piston head 62. The first rack portion 51 and the second rack portion 61 are respectively located on opposite sides of the gear shaft 40, and the racks on the first rack portion 51 and the second rack portion 61 are meshed with the teeth on the gear shaft 40 to form a gear transmission mechanism. The output end of the core piston 50 is connected to the valve core 20. The valve core 20 also includes a connector 23 connected to the core piston 50. A connecting hole is provided on the first piston head 52. The connector 23 passes through the connecting hole and a slot is provided at the end passing through the connecting hole. A buckle ring 24 is installed in the slot to connect and fix the connector 23 to the core piston 50.

[0046] The first piston head 52 and the second piston head 62 are in the shape of a circular plate. The first piston head 52 is vertically connected to the first rack portion 51, and the second piston head 62 is vertically connected to the second rack portion 61. The first piston head 52 and the second piston head 62 are respectively installed in the valve core power chamber 11 through sealing rings to form a first sub-chamber; the cavity in the valve core power chamber 11 located outside the first sub-chamber and adjacent to the second piston head 62 is the second sub-chamber; the cavity in the valve core power chamber 11 located outside the first sub-chamber and adjacent to the first piston head 52 is the third sub-chamber. The air holes are divided into a first air hole 111 connected to the first sub-chamber and a second air hole 112 connected to the second sub-chamber. Figure 7-8 As shown, the air compressor is used to fill the first air hole 111 with high pressure gas, so that the core piston 50 and the balance piston 60 move outward in opposite directions, that is, the core piston 50 is pushed toward the third sub-chamber, thereby pushing the valve core 20 to move toward the valve cover opening 31 to close the valve cover 30, and the balance piston 60 is pushed toward the second sub-chamber; at this time, the air compressor connected to the second air hole 112 stops working, and the second air hole 112 is used to discharge gas. Figure 5 As shown, the air compressor connected to the second air hole 112 fills the second sub-chamber with high-pressure gas through the second air hole 112. At this time, the air compressor connected to the first air hole 111 stops working, and the first air hole 111 is used to discharge air, thereby pushing the balance piston 60 to move toward the core piston 50. When the balance piston 60 moves, it will drive the gear shaft 40 to rotate, and the gear shaft 40 will drive the core piston 50 to move toward the balance piston 60, thereby driving the valve core 20 to move away from the valve cover 30 to open the valve cover 30.

[0047] In order to continue to use the through-valve when the air compressor cannot work, such as when there is a power outage or a malfunction, a mechanical drive chamber vertically connected to the valve core power chamber 11 is also provided on the valve body 10. A valve stem 70 is installed in the mechanical drive chamber through a sealing ring. One end of the valve stem 70 extends out of the valve body 10, and the other end is axially connected to the gear shaft 40, so that the rotation of the gear shaft 40 can be controlled by the rotation of the valve stem 70 to provide driving force for the piston assembly.

[0048] In specific use, the through valve can be opened and closed by manually rotating the valve stem 70. The end of the valve stem 70 extending outside the valve body 10 can also be connected to a motor and driven by the motor. Manually rotating the valve stem 70 can avoid the problem of the through valve being unable to close due to power failure.

[0049] In the description of this specification, reference to descriptions belonging to "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0050] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A built-in pneumatic through valve, characterized in that: include: A valve body, wherein a medium delivery chamber and a valve core power chamber are provided in the valve body, wherein the medium delivery chamber is provided with a plurality of strips, wherein the medium delivery chambers are distributed around the outside of the valve core power chamber, and wherein two valve ports are provided on the valve body, wherein the two valve ports are respectively located at two ends of the medium delivery chamber and are connected to form a medium delivery channel; A valve core is located inside the valve port and is used to block the valve port; a port of the medium delivery cavity close to the valve core does not intersect or partially intersects with the valve core on an extended line; A piston assembly is installed in the valve core power cavity, and is used to push the valve core, control the opening and closing between the valve core and the valve port, so as to realize the opening and closing of the medium conveying channel; the piston assembly is a pneumatic piston assembly, and the valve body is provided with an air hole, and the air hole is connected to an air compression device to provide power for the piston assembly; the power output end of the piston assembly is connected to the valve core, and the two ends of the valve core power cavity facing the two valve ports are provided with a sealing structure to prevent the medium from entering the valve core power cavity; A valve cover is installed in the valve port near the valve core, and a valve cover port adapted to the valve core is provided on the valve cover; the valve core comprises a first plug for blocking the valve cover port opposite thereto and a second plug for blocking one end of the valve core power chamber, the second plug is sealingly installed in the valve core power chamber, and the sealing structure is formed at one end of the valve core power chamber; the first plug extends out of the valve core power chamber and faces the valve cover port, the first plug is located between the valve cover port and the medium delivery chamber, and the port of the medium delivery chamber near the first plug does not intersect or partially intersects with the first plug on an extended line; The piston assembly includes a core piston, a balance piston and a gear shaft located between the core piston and the balance piston, the core piston includes a first rack portion and a first piston head, the balance piston includes a second rack portion and a second piston head, the first rack portion and the second rack portion are respectively located on opposite sides of the gear shaft, and the racks on the first rack portion and the second rack portion are meshed with the teeth on the gear shaft to form a gear transmission mechanism, the output end of the core piston is connected to the valve core; the first piston head is connected to the first rack portion, and the second piston head is connected to the second rack portion, the first piston head and the second piston head are respectively relatively sealed and installed in the valve core power chamber to form a first sub-chamber; the cavity position in the valve core power chamber located outside the first sub-chamber and adjacent to the second piston head is the second sub-chamber; the cavity position in the valve core power chamber located outside the first sub-chamber and adjacent to the first piston head is the third sub-chamber; the air hole is divided into a first air hole connected to the first sub-chamber and a second air hole connected to the second sub-chamber.

2. The built-in pneumatic straight-through valve according to claim 1, characterized in that: The sealing structure at the other end of the valve core power chamber is composed of a cover, and the cover is designed to be conical and diverter, and the thin end of the cover faces the valve port.

3. The built-in pneumatic straight-through valve according to claim 1 or 2, characterized in that: The valve core includes a connecting head connected to the core piston, a connecting hole is provided on the first piston head, the connecting head passes through the connecting hole and a slot is provided at the end passing through the connecting hole, a buckle is installed in the slot to connect and fix the connecting head to the core piston.

4. The built-in pneumatic straight-through valve according to claim 1 or 2, characterized in that: The valve body is provided with a mechanical drive cavity vertically connected to the valve core power cavity. A valve stem is sealed in the mechanical drive cavity. One end of the valve stem extends out of the valve body, and the other end is axially connected to the gear shaft.

5. The built-in pneumatic straight-through valve according to claim 4, characterized in that: One end of the valve stem extending out of the valve body is driven to rotate by a motor.

6. The built-in pneumatic straight-through valve according to claim 1, characterized in that: The cross section of the medium conveying cavity is arc-shaped.

Images