Balanced angle seat valve

Abstract

The utility model belongs to valve technical field, concretely relates to a balanced angle seat valve, including actuator, valve rod, valve body, valve cover and valve core, one end of valve rod sets up on actuator, valve body includes import, export and installation mouth, is provided with valve seat in import, valve cover includes valve rod sealing cylinder, valve body sealing cylinder and valve core sealing cylinder connected in proper order, valve rod sealing cylinder is sleeved on valve rod, valve body sealing cylinder and installation mouth of valve body fixed connection, valve core sealing cylinder is located in installation mouth, valve core includes connector, connector is connected with valve rod, connector fixedly connected with piston cylinder with bottom and open end, the outer wall of piston cylinder and the inner wall of valve core sealing cylinder are slidingly sealedly connected, the bottom of piston cylinder is matched with valve seat and is provided with first communication hole in the bottom of piston cylinder. The utility model solves the problem that the valve core of angle seat valve in the prior art bears larger unbalanced force, leading to the valve being prone to impact and vibration when being opened or closed, and affecting the action stability.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a balanced angle seat valve. Background Technology

[0002] In the field of industrial automation control, angle seat valves, as a common fluid control element, are widely used in various working conditions, such as chemical, pharmaceutical, and food processing industries. Traditional angle seat valves typically employ an unbalanced internal structure, which has several limitations in long-term use. In existing technologies, the valve core of an unbalanced angle seat valve is directly subjected to the medium pressure during operation, generating a significant unbalanced force. This causes the valve to be prone to impact and vibration when opening or closing, affecting not only the smoothness of operation but also potentially leading to water hammer and reducing the valve's service life.

[0003] Furthermore, valve stems bear significant tensile and compressive forces under high pressure differential conditions, often requiring a thicker stem design to meet strength requirements. This increases the valve's structural size and manufacturing cost. Simultaneously, unbalanced valve structures have lower allowable pressure differentials, typically far below the nominal pressure, limiting their application under high pressure conditions and necessitating actuators with larger output forces, increasing system complexity and energy consumption. Therefore, there is an urgent need in this field for a structurally optimized and more stable angle seat valve solution. Utility Model Content

[0004] The purpose of this invention is to provide a balanced angle seat valve to solve the problem that the valve core of the existing angle seat valve is subjected to a large unbalanced force, which causes the valve to be prone to impact and vibration when opening or closing, affecting the smoothness of operation.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A balanced angle seat valve includes an actuator, a valve stem, a valve body, a valve cover, and a valve core.

[0007] One end of the valve stem is mounted on the actuator, and the actuator drives the valve stem to move axially.

[0008] The valve body includes an inlet, an outlet, and a mounting port, and the inlet is provided with a valve seat with an opening facing the mounting port;

[0009] The valve cover includes a valve stem sealing cylinder, a valve body sealing cylinder, and a valve core sealing cylinder connected in sequence. The valve stem sealing cylinder is sleeved on the valve stem, the valve body sealing cylinder is fixedly connected to the mounting port of the valve body, and the valve core sealing cylinder is located inside the mounting port.

[0010] The valve core includes a connector, which is connected to the end of the valve stem away from the actuator. A piston cylinder with a bottom and an open end is fixedly connected to the end of the connector away from the valve stem. The open end of the piston cylinder faces the actuator. The outer wall of the piston cylinder is slidably sealed to the inner wall of the valve core sealing cylinder. The bottom of the piston cylinder at the end away from the actuator is fitted with a valve seat. The bottom of the piston cylinder is provided with a first connecting hole.

[0011] Furthermore, a valve head gasket is provided on the outer bottom of the piston cylinder. The end of the connector away from the valve stem passes through the bottom of the piston cylinder and is threadedly connected to the valve head gasket with a fastening nut. The valve head gasket is also provided with a second connecting hole that communicates with the first connecting hole. This arrangement ensures a stable connection between the connector and the piston cylinder, improving the stability of the valve operation.

[0012] Furthermore, the valve head gasket has a valve head sealing gasket on its edge. When the valve core contacts the valve seat, the valve head sealing gasket seals the gap between the valve seat and the bottom of the piston cylinder. By using the valve head sealing gasket, the seal between the bottom of the piston cylinder and the valve seat is made more secure when the valve is closed, preventing the medium from passing through gaps.

[0013] Furthermore, a sealing assembly is fitted between the valve stem and the valve stem sealing cylinder. This sealing assembly includes packing and a first spring, both of which are fitted onto the valve stem. This arrangement ensures a tighter seal between the valve stem and the valve stem sealing cylinder, preventing media from leaking out of the gap.

[0014] Furthermore, at least one mounting groove is provided circumferentially on the piston cylinder, and a first sealing ring is fitted inside the at least one mounting groove. The first sealing ring can prevent the medium from leaking out from the gap between the piston cylinder and the valve core sealing cylinder.

[0015] Furthermore, the piston cylinder is provided with at least one mounting groove in the circumferential direction, and a guide belt is fitted inside the at least one mounting groove. The guide belt provides reliable guidance for the piston cylinder of the valve core within the valve core sealing cylinder, resulting in smooth operation and greatly improving the service life of the valve.

[0016] Furthermore, the connector has a mounting groove at one end near the valve stem, and a transverse connecting pin is provided within the mounting groove; the valve stem has a transverse mounting hole at one end near the connector, and the connecting pin movably passes through the mounting hole. This design allows the valve core connector and valve stem to be in a movable connection. When the valve is closed, after the valve core contacts the valve seat to form a seal, the valve stem can automatically align, ensuring optimal sealing. During production, a transverse through-hole can be provided on the connector, penetrating the entire mounting groove. The valve stem is then inserted into the mounting groove, and the connecting pin passes through the through-hole and the mounting hole on the valve stem. Finally, the two ends of the valve stem are fixed by welding.

[0017] Furthermore, the actuator includes a housing with a bottom and an open end. A piston plate is slidably and sealed within the housing, and a second spring is positioned between the piston plate and the bottom of the housing. The valve stem passes fixedly through the piston plate. A sealing plate is provided on the inner wall of the housing at the open end, and the valve stem slides through the sealing plate. The internal space between the sealing plate and the piston plate forms a first air chamber, and the internal space between the piston plate and the bottom of the housing forms a second air chamber. An air inlet is provided on the housing located in the first air chamber, and an air outlet is provided on the housing located in the second air chamber. In this technical solution, when the valve core contacts the valve body to form a closed state, the second spring is in a compressed state, transmitting pressure to the connector through the valve stem, and then to the piston cylinder, sealing the entire valve core with the valve seat. When it is necessary to open the valve, pressure is applied from the air inlet, and gas enters the first air chamber, pushing the piston plate upward, which in turn drives the valve stem to move the piston cylinder upward, creating a gap between the entire valve core and the valve seat, allowing the medium entering from the inlet to pass through and flowing out from the outlet.

[0018] Furthermore, a second sealing ring is provided circumferentially on the piston plate. The second sealing ring prevents the first and second air chambers from connecting when the valve is opened.

[0019] Furthermore, an annular groove is provided on the side of the piston plate away from the sealing plate, and the end of the second spring is disposed within the annular groove. This arrangement makes the installation of the second spring more stable and prevents displacement.

[0020] The utility model adopting the above technical solution has the following advantages:

[0021] 1. The angle seat valve of this utility model requires less force to open or close the valve, so it only requires a smaller actuator and valve stem diameter. This not only reduces costs, but also reduces the force exerted by the medium pressure on the valve core, making the valve move more smoothly when opening or closing, without impact or vibration, and preventing water hammer.

[0022] 2. The piston cylinder of this utility model is set inside the valve core sealing cylinder, and the piston cylinder of the valve core is reliably guided inside the valve core sealing cylinder by the setting of the guide belt, so that the operation is smooth and the service life of the valve is greatly improved.

[0023] 3. The valve stem and connector of this utility model are movably connected. When the valve is closed, after the valve core and valve seat come into contact and form a seal, the valve stem can automatically align itself to ensure the best sealing effect and make the valve sealing effect better. Attached Figure Description

[0024] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0025] Figure 1 This is a cross-sectional structural diagram of a balanced angle seat valve according to the present invention;

[0026] Figure 2 yes Figure 1 Schematic diagram of the structure at point A;

[0027] Figure 3 yes Figure 1 A schematic diagram of the structure at point B.

[0028] The symbols for the main components are explained below:

[0029] Valve body 1, inlet 101, outlet 102, mounting port 103, valve seat 104

[0030] Valve cover 2, valve stem sealing cylinder 201, valve body sealing cylinder 202, valve core sealing cylinder 203

[0031] Valve core 3, connector 301, mounting groove 302, connecting pin 303, piston cylinder 304, guide band 305, first sealing ring 306, first connecting hole 307, valve head gasket 308, fastening nut 309, second connecting hole 310, valve head sealing gasket 311.

[0032] Actuator 4, housing 401, piston plate 402, second spring 403, sealing plate 404, air inlet 405, air outlet 406, second sealing ring 407, annular groove 408.

[0033] Valve stem 5, packing 6, first spring 7. Detailed Implementation

[0034] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0035] This embodiment is a balanced angle seat valve, such as Figure 1 As shown, it includes a valve body 1, a valve cover 2, a valve core 3, an actuator 4, and a valve stem 5. (As shown...) Figure 1 and Figure 3 As shown, the valve body 1 includes an inlet 101, an outlet 102, and a mounting port 103. The inlet 101 has an integrally cast valve seat 104 with its opening facing the mounting port 103. The valve cover 2 is integrally formed and includes a valve stem sealing cylinder 201, a valve body sealing cylinder 202, and a valve core sealing cylinder 203. The valve stem sealing cylinder 201 is sleeved on the valve stem 5. A sealing assembly is sleeved between the valve stem 5 and the valve stem sealing cylinder 201. The sealing assembly includes a packing 6 and a first spring 7. Both the packing 6 and the first spring 7 are sleeved on the valve stem 5. The valve body sealing cylinder 202 is fixedly connected to the mounting port 103 of the valve body 1. This fixed connection can be welded or bolted. A sealing ring is also provided at the connection. The valve core sealing cylinder 203 is located inside the mounting port 103.

[0036] like Figure 3 As shown, the valve core 3 includes a connector 301, which is movably connected to the lower end of the valve stem 5. Specifically, the connector 301 has a mounting groove 302 near the valve stem 5, and a transverse connecting pin 303 is provided in the mounting groove 302. The lower end of the valve stem 5 has a transverse mounting hole, and the connecting pin 303 is movably inserted into the mounting hole. During production, a through hole can be provided on the connector 301, extending transversely through the entire mounting groove 302. Then, the valve stem 5 is inserted into the mounting groove 302, and the connecting pin 303 passes through the through hole and the mounting hole on the valve stem 5. Finally, the two ends of the valve stem 5 are fixed by welding.

[0037] like Figure 3 As shown, a piston cylinder 304 with a bottom and an open end is fixedly connected to the lower end of the connector 301. The open end of the piston cylinder 304 faces upward, and the outer wall of the piston cylinder 304 is slidably sealed to the inner wall of the valve core sealing cylinder 203. To provide guidance and a tight seal, three mounting grooves are arranged circumferentially on the piston cylinder 304. A guide strip 305 is fitted in the middle mounting groove, and a first sealing ring 306 is fitted in each of the two mounting grooves on both sides. The bottom of the lower end of the piston cylinder 304 is fitted to the valve seat 104, and a first connecting hole 307 is provided at the bottom of the piston cylinder 304.

[0038] like Figure 1 and Figure 2 As shown, the upper end of the valve stem 5 is mounted on the actuator 4, and the actuator 4 drives the valve stem 5 to move axially. Specifically, the actuator 4 includes a housing 401, which includes a bottom and an open end. A piston plate 402 is slidably and sealed inside the housing 401. A second spring 403 is provided between the piston plate 402 and the bottom of the housing 401. The valve stem 5 passes through the piston plate 402. A sealing plate 404 is provided on the inner wall of the housing 401 at the open end, and the valve stem 5 slides through the sealing plate 404. The internal space of the housing 401 between the sealing plate 404 and the piston plate 402 forms a first air chamber, and the internal space of the housing 401 between the piston plate 402 and the bottom of the housing 401 forms a second air chamber. An air inlet 405 is provided on the housing 401 located in the first air chamber, and an air outlet 406 is provided on the housing 401 located in the second air chamber.

[0039] like Figure 2 As shown, to improve the sealing performance of the piston plate 402, a second sealing ring 407 is fitted around the piston plate 402. To make the installation of the second spring 403 more stable, an annular groove 408 is provided on the upper side of the piston plate 402, and the end of the second spring 403 is disposed in the annular groove 408.

[0040] like Figure 3 As shown, to ensure a stable connection between the connector 301 and the piston cylinder 304 and improve the stability of valve operation, a valve head gasket 308 is provided on the outer side of the bottom of the piston cylinder 304. The end of the connector 301 away from the valve stem 5 passes through the bottom of the piston cylinder 304 and is threadedly connected to the valve head gasket 308 with a fastening nut 309. The valve head gasket 308 is also provided with a second connecting hole 310 that communicates with the first connecting hole 307. To make the seal between the bottom of the piston cylinder 304 and the valve seat 104 more tight and prevent the medium from passing through gaps, a valve head sealing gasket 311 is provided on the edge of the valve head gasket 308. When the valve core 3 contacts the valve seat 104, the valve head sealing gasket 311 seals the gap between the valve seat 104 and the bottom of the piston cylinder 304.

[0041] The principle of this utility model of a balanced angle seat valve is as follows:

[0042] When the valve core 3 contacts the valve body 1 to form a closed state, the second spring 403 is in a compressed state, and the pressure is transmitted to the connector 301 through the valve stem 5, and then to the piston cylinder 304. The entire valve core 3 is sealed with the valve seat 104. When it is necessary to open the valve, an external cylinder is used to pressurize from the air inlet 405. The gas enters the first air chamber and pushes the piston plate 402 upward, which in turn drives the valve stem 5 to move the piston cylinder 304 upward, so that the entire valve core 3 and the valve seat 104 form a gap, allowing the medium entering from the inlet 101 to pass through and flow out from the outlet 102.

[0043] When the valve is closed, the valve body sealing cylinder 202 and the valve core sealing cylinder 203, together with the piston cylinder 304, form a chamber. This chamber can be connected to the inlet 101 of the valve body 1 through the first connecting hole 307 and the second connecting hole 310. Thus, when the valve core 3 contacts the valve seat 104 to form a seal between the inlet 101 and the outlet 102, the medium in the inlet 101 can enter the chamber through the first connecting hole 307 and the second connecting hole 310, resulting in equal medium pressure, P1, on both the upper and lower sides of the bottom of the piston cylinder 304. Therefore, the actuator 4 only needs to apply a small pressure to the valve stem 5, i.e., a small pressure to the piston cylinder 304, to achieve a seal between the piston cylinder 304 and the valve seat 104.

[0044] When it is necessary to open the valve, the actuator 4 only needs to apply a small pulling force to the valve stem 5 to move the piston cylinder 304 upward, so that the bottom of the piston cylinder 304 is separated from the valve seat 104, thereby connecting the inlet 101 and the outlet 102.

[0045] In summary, because this angle seat valve requires less force to open or close, it only needs a smaller actuator 4 and valve stem 5 diameter. This not only reduces costs but also reduces the force exerted by the medium pressure on the valve core 3, making the valve operate more smoothly without impact or vibration when opening or closing, thus preventing water hammer.

[0046] Furthermore, the piston cylinder 304 is located inside the valve core sealing cylinder 203, and through the setting of the guide belt 305, the piston cylinder 304 of the valve core 3 has reliable guidance inside the valve core sealing cylinder 203, resulting in smooth operation and greatly improving the service life of the valve.

[0047] In addition, the valve stem 5 and the connector 301 are movably connected. When the valve is closed, after the valve core 3 and the valve seat 104 come into contact and form a seal, the valve stem 5 can automatically align itself to ensure the best sealing effect and make the valve seal better.

[0048] The above provides a detailed description of a balanced angle seat valve provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A balanced angle seat valve, comprising an actuator, a valve stem, a valve body, a valve cover, and a valve core, wherein one end of the valve stem is mounted on the actuator, and the actuator drives the valve stem to move axially; characterized in that: The valve body includes an inlet, an outlet, and a mounting port, and the inlet is provided with a valve seat with an opening facing the mounting port; The valve cover includes a valve stem sealing cylinder, a valve body sealing cylinder, and a valve core sealing cylinder connected in sequence. The valve stem sealing cylinder is sleeved on the valve stem, the valve body sealing cylinder is fixedly connected to the mounting port of the valve body, and the valve core sealing cylinder is located inside the mounting port. The valve core includes a connector, which is connected to the end of the valve stem away from the actuator. A piston cylinder with a bottom and an open end is fixedly connected to the end of the connector away from the valve stem. The open end of the piston cylinder faces the actuator. The outer wall of the piston cylinder is slidably sealed to the inner wall of the valve core sealing cylinder. The bottom of the piston cylinder at the end away from the actuator is fitted with a valve seat. The bottom of the piston cylinder is provided with a first connecting hole.

2. A balanced angle seat valve according to claim 1, characterized in that: A valve head gasket is also provided on the outer bottom of the piston cylinder. The end of the connector away from the valve stem passes through the bottom of the piston cylinder and is threadedly connected to the valve head gasket with a fastening nut. A second connecting hole is also provided on the valve head gasket, which communicates with the first connecting hole.

3. A balanced angle seat valve according to claim 2, characterized in that: The valve head gasket is provided with a valve head sealing gasket on its edge. When the valve core contacts the valve seat, the valve head sealing gasket seals the gap between the valve seat and the bottom of the piston cylinder.

4. A balanced angle seat valve according to claim 1, characterized in that: A sealing assembly is fitted between the valve stem and the valve stem sealing cylinder. The sealing assembly includes packing and a first spring, both of which are fitted onto the valve stem.

5. A balanced angle seat valve according to any one of claims 1-4, characterized in that: The piston cylinder has at least one mounting groove arranged circumferentially, and a first sealing ring is fitted inside the at least one mounting groove.

6. A balanced angle seat valve according to any one of claims 1-4, characterized in that: The piston cylinder has at least one mounting groove arranged circumferentially in the circumferential direction, and a guide belt is sleeved in the at least one mounting groove.

7. A balanced angle seat valve according to claim 6, characterized in that: The connector has a mounting groove at one end near the valve stem, and a transverse connecting pin is provided in the mounting groove; the valve stem has a transverse mounting hole at one end near the connector, and the connecting pin is movably inserted into the mounting hole.

8. A balanced angle seat valve according to any one of claims 1-4, characterized in that: The actuator includes a housing with a bottom and an open end. A piston plate is slidably and sealed inside the housing. A second spring is disposed between the piston plate and the bottom of the housing. The valve stem passes through the piston plate in a fixed manner. A sealing plate is disposed on the inner wall of the housing at the open end. The valve stem slides through the sealing plate. The internal space of the housing between the sealing plate and the piston plate forms a first air chamber. The internal space of the housing between the piston plate and the bottom of the housing forms a second air chamber. An air inlet is provided on the housing located in the first air chamber, and an air outlet is provided on the housing located in the second air chamber.

9. A balanced angle seat valve according to claim 8, characterized in that: A second sealing ring is provided on the circumferential direction of the piston plate.

10. A balanced angle seat valve according to claim 9, characterized in that: The piston plate has an annular groove on the side away from the sealing plate, and the end of the second spring is disposed in the annular groove.

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