Angle seat valve with self-lubricating sealing structure

Abstract

The angle seat valve with the self-lubricating sealing structure comprises a valve body, a connecting piece, an air cylinder, a sealing assembly, a piston, a valve rod, a valve element and an air cylinder spring, the sealing assembly comprises a sealing spring, a pressing ring, a U-shaped ring and a guide sleeve which are sequentially distributed from top to bottom, and the pressing ring is provided with a containing groove used for containing lubricating grease. A sealing ring is arranged on the side, facing the sealing spring, of the containing groove of the pressing ring. According to the angle seat valve, when the air cylinder controls the valve rod to move up and down, lubricating grease in the containing groove is coated on the rod body of the valve rod, so that the lubricating effect of the valve rod is kept, and the service life of the angle seat valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an angle seat valve with a self-lubricating sealing structure. Background Art

[0002] The angle seat valve is a guided angle seat valve operated by a single-acting pneumatic actuator with spring safety protection. It is widely used in working conditions with frequent short-term startup. The traditional angle seat valve includes a valve body, a valve stem slidingly connected to the valve body, and a cylinder and valve core arranged at both ends of the valve stem. The valve core is controlled to open or close by the cylinder transmission. Since the valve stem is sealed to the valve body through a sealing assembly, when the angle seat valve is frequently opened and closed, the valve stem frequently rubs against the sealing assembly, making the grease on the valve stem easy to evaporate, thereby affecting the valve stem transmission efficiency, accelerating the wear of the sealing assembly, and accompanied by leakage of the angle seat valve. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: an angle seat valve with a self-lubricating sealing structure, including a valve body, a connecting piece, a cylinder, a sealing assembly, a piston, a valve stem, a valve core and a cylinder spring, the valve body is provided with an inlet end, an outlet end and a control end that are connected to each other, one end of the connecting piece is connected to the control end, and the other end is connected to the cylinder, and a sealing assembly is provided between the connecting piece and the cylinder, one end of the valve stem is slidably connected to the cylinder through the piston, and the other end is connected to the valve core through the sealing assembly, and a cylinder spring is provided between the piston and the cylinder, the sealing assembly includes a sealing spring, a pressure ring, a U-shaped ring and a guide sleeve distributed in sequence from top to bottom, the pressure ring is provided with a receiving groove for accommodating grease, and the pressure ring is provided with a sealing ring on the side of the receiving groove facing the sealing spring.

[0004] By adopting the above technical solution, when the cylinder controls the valve stem to move up and down, the grease in the receiving groove is applied to the stem of the valve stem, thereby maintaining the lubrication effect of the valve stem and improving the service life of the angle seat valve. The receiving groove is isolated by the sealing ring to prevent the grease from being contaminated and reduce the consumption of grease.

[0005] The utility model is further configured such that the connecting piece is provided with a countersunk hole, and the guide sleeve is provided with a first protrusion bent toward the valve stem, the inner diameter of the first protrusion is smaller than the outer diameter of the valve stem, and at the same time, with the action of the sealing spring pressing, the guide sleeve squeezes the valve stem in the radial direction, thereby improving the sealing effect between the guide sleeve and the valve stem and avoiding leakage of the liquid medium.

[0006] The utility model is further configured such that a positioning portion and a groove portion are respectively provided at the upper and lower ends of the pressure ring, one end of the sealing spring abuts against the cylinder through a gasket, and the other end is sleeved on the positioning portion, the U-shaped ring is clamped in the groove portion, and the bottom of the sealing spring is sleeved on the positioning portion to prevent the sealing spring from tilting, misalignment, and getting stuck.

[0007] The utility model is further configured such that the guide sleeve is provided with a second protrusion adapted to the U-shaped ring, a plurality of U-shaped rings are provided between the pressure ring and the guide sleeve, and space required for deformation is formed between adjacent U-shaped rings, so that the assembled sealing assembly structure is more stable.

[0008] The utility model is further configured such that a vent hole for balancing the air pressure is provided on one side of the connector, and sealing rings are provided on both the inner and outer sides of the pressure ring. The vent hole is used to balance the air pressure in the inner cavity of the connector, and the sealing ring is provided between the vent hole and the grease, thereby isolating the receiving groove to prevent the grease in the receiving groove from being contaminated.

[0009] The utility model is further configured such that a side sealing ring and a bottom sealing gasket are provided between the connecting piece and the valve body, and the connecting piece is provided with a first step surface and a second step surface for sleeve-fitting the side sealing ring and the bottom sealing gasket, and two sealing structures, the side sealing ring and the bottom sealing gasket, are provided between the connecting piece and the valve body, thereby preventing leakage of the medium in the valve body.

[0010] The utility model is further configured such that the inlet and outlet ends are externally connected to pipelines by means of threaded connection / flange connection / quick-fit connection / welded connection, so that the angle seat valve is applicable to different working environments and improves product competitiveness.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. When the cylinder controls the valve stem to move up and down, the grease in the accommodating groove is applied to the stem of the valve stem, thereby maintaining the lubrication effect of the valve stem and increasing the service life of the angle seat valve;

[0013] 2. The sealing ring isolates the containing groove to prevent the grease from being contaminated, while preventing the volatilization of some components in the grease and reducing the consumption of grease.

[0014] The embodiments of the present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional view of the utility model when the valve core is opened;

[0016] Figure 2 For the utility model Figure 1 A partial enlarged view of the A-direction view;

[0017] Figure 3It is a cross-sectional view of the pressure ring of the present utility model;

[0018] Figure 4 It is a cross-sectional view of the guide sleeve of the utility model;

[0019] Wherein: 1 - valve body, 2 - connector, 3 - cylinder, 4 - sealing assembly, 5 - piston, 6 - valve stem, 7 - valve core, 8 - cylinder spring, 11 - inlet end, 12 - outlet end, 13 - control end, 14 - sealing spring, 15 - pressure ring, 16 - U-shaped ring, 17 - guide sleeve, 18 - receiving groove, 19 - sealing ring, 21 - countersunk hole, 22 - first protrusion, 23 - positioning part, 24 - groove part, 25 - second protrusion, 26 - vent hole, 27 - side sealing ring, 28 - bottom sealing gasket, 29 - first step surface, 30 - second step surface; DETAILED DESCRIPTION

[0020] like Figure 1 、 2 As shown, this embodiment provides an angle seat valve with a self-lubricating sealing structure, including a valve body 1, a connecting part 2, a cylinder 3, a sealing assembly 4, a piston 5, a valve stem 6, a valve core 7 and a cylinder spring 8. The valve body 1 is provided with an inlet end 11, an outlet end 12 and a control end 13 that are connected to each other. One end of the connecting part 2 is connected to the control end 13, and the other end is connected to the cylinder 3, and a sealing assembly 4 is provided between the connecting part 2 and the cylinder 3. One end of the valve stem 6 is slidably connected to the cylinder 3 through the piston 5, and the other end is connected to the valve core 7 through the sealing assembly 4, and a cylinder spring 8 is provided between the piston 5 and the cylinder 3. The sealing assembly 4 includes a sealing spring 14, a pressure ring 15, a U-shaped ring 16 and a guide sleeve 17 distributed in sequence from top to bottom. The pressure ring 15 is provided with a receiving groove 18 for accommodating grease, and the pressure ring 15 is located on the side of the receiving groove 18 facing the sealing spring 14 and is provided with a sealing ring 19.

[0021] Combine Figure 3 、 4 As shown, in this embodiment, the connecting member 2 is provided with a countersunk hole 21, the guide sleeve 17 is provided with a first protrusion 22 bent toward the valve stem 6, the upper and lower ends of the pressure ring 15 are respectively provided with a positioning portion 23 and a groove portion 24, one end of the sealing spring 14 abuts against the cylinder 3 through a gasket, and the other end is sleeved on the positioning portion 23, the U-shaped ring 16 is clamped in the groove portion 24, the guide sleeve 17 is provided with a second protrusion 25 adapted to the U-shaped ring 16, and a plurality of U-shaped rings 16 are provided between the pressure ring 15 and the guide sleeve 17, one side of the connecting member 2 is provided with an air vent 26 for balancing the air pressure, and the inner and outer sides of the pressure ring 15 are provided with a sealing ring 19.

[0022] In this embodiment, a side sealing ring 27 and a bottom sealing gasket 28 are provided between the connecting member 2 and the valve body 1, and the connecting member 2 is provided with a first step surface 29 and a second step surface 30 for sleeve-fitting the side sealing ring 27 and the bottom sealing gasket 28, and the inlet end 11 and the outlet end 12 are connected to the external pipeline by threaded connection / flange connection / quick-release connection / welding connection.

[0023] The working principle of the present utility model is that the flowing medium flows from the inlet end 11 to the outlet end 12, and the cylinder 3 is provided with air holes for connecting an external air pump on both sides of the piston 5. The valve stem 6 is driven up and down by the piston 5 in a pneumatic manner, thereby controlling the stroke of the valve core 7 in the valve body 1 and realizing the control of the on and off of the angle seat valve. When the valve stem 6 moves up and down, the grease in the accommodating groove 18 is applied to the body of the valve stem 6, thereby maintaining the lubrication effect of the valve stem 6 and improving the service life of the angle seat valve.

[0024] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An angle seat valve with a self-lubricating sealing structure, comprising a valve body (1), a connecting member (2), a cylinder (3), a sealing assembly (4), a piston (5), a valve stem (6), a valve core (7) and a cylinder spring (8), wherein the valve body (1) is provided with an inlet end (11), an outlet end (12) and a control end (13) which are connected to each other, one end of the connecting member (2) is connected to the control end (13), and the other end is connected to the cylinder (3), and a sealing assembly (4) is provided between the connecting member (2) and the cylinder (3), one end of the valve stem (6) is slidably connected to the cylinder (3) through the piston (5), and the other end passes through the sealing assembly (4) and is connected to the valve core (7), and a cylinder spring (8) is provided between the piston (5) and the cylinder (3), characterized in that: The sealing assembly (4) comprises a sealing spring (14), a pressure ring (15), a U-shaped ring (16) and a guide sleeve (17) which are sequentially arranged from top to bottom. The pressure ring (15) is provided with a receiving groove (18) for receiving grease, and a sealing ring (19) is provided on the side of the pressure ring (15) located in the receiving groove (18) facing the sealing spring (14).

2. The angle seat valve with a self-lubricating sealing structure according to claim 1, characterized in that: The connecting piece (2) is provided with a countersunk hole (21), and the guide sleeve (17) is provided with a first protrusion (22) bent toward the valve stem (6).

3. The angle seat valve with a self-lubricating sealing structure according to claim 1, characterized in that: The upper and lower ends of the pressure ring (15) are respectively provided with a positioning portion (23) and a groove portion (24); one end of the sealing spring (14) abuts against the cylinder (3) through a gasket, and the other end is sleeved on the positioning portion (23); and the U-shaped ring (16) is clamped in the groove portion (24).

4. The angle seat valve with a self-lubricating sealing structure according to claim 3, characterized in that: The guide sleeve (17) is provided with a second protrusion (25) adapted to the U-shaped ring (16).

5. The angle seat valve with a self-lubricating sealing structure according to claim 1, characterized in that: A vent hole (26) for balancing air pressure is provided on one side of the connecting piece (2), and sealing rings (19) are provided on both the inner and outer sides of the pressure ring (15).

6. The angle seat valve with a self-lubricating sealing structure according to claim 1, characterized in that: A side sealing ring (27) and a bottom sealing gasket (28) are provided between the connecting piece (2) and the valve body (1), and the connecting piece (2) is provided with a first step surface (29) and a second step surface (30) for sleeve-engaging the side sealing ring (27) and the bottom sealing gasket (28).

7. The angle seat valve with a self-lubricating sealing structure according to claim 1, characterized in that: The inlet end (11) and the outlet end (12) are connected to an external pipeline by means of threaded connection / flange connection / quick-fit connection / welding connection.

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