Angle seat valve

Abstract

The utility model discloses an angle seat valve which comprises a valve body, a valve seat, a valve rod and a sealing piece, the valve rod is provided with a nut which is used for locking the sealing piece and forms sealing fit with the valve seat, the valve rod is provided with a clamping assembly which forms limiting abutting with the nut, and the clamping assembly comprises a first clamping sleeve, a second clamping sleeve and a limiting supporting foot. The first clamping sleeve and the second clamping sleeve are clamped on the peripheral face of the nut, one end of the limiting supporting foot is connected to the second clamping sleeve and extends towards one side of the first clamping sleeve, and the other end of the limiting supporting foot penetrates through the valve rod and is clamped on the first clamping sleeve. And the problem of sealing failure of the sealing piece and the valve seat is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a valve stem locking structure of an angle seat valve. Background Art

[0002] An angle seat valve is a valve that controls the fluid flow by a pneumatic actuator. According to the size of the control signal pressure, it generates a corresponding thrust to push the valve body to act. The valve body is in direct contact with the fluid, thereby regulating the flow of the fluid. The angle seat valve can be frequently started within a short time and has the characteristics of sensitive reaction and accurate action. Since the valve seat will continuously impact the valve body during the operation of the angle seat valve, the nut for locking the valve stem will become loose, resulting in the sealing failure between the seal and the valve seat, posing a great potential safety hazard. Content of the Utility Model

[0003] In view of the above problems, the utility model provides an angle seat valve, which has the advantage of stable connection, can prevent the nut on the valve stem from loosening, and avoid the problem of sealing failure between the seal and the valve seat.

[0004] To achieve the above object, the utility model provides the following technical solution: An angle seat valve includes a valve body, a valve seat, a valve stem and a seal. A nut for locking the seal and forming a sealing fit with the valve seat is arranged on the valve stem. A clamping component for forming a limiting and pressing fit with the nut is arranged on the valve stem. The clamping component includes a first sleeve, a second sleeve and a limiting support leg. The first sleeve and the second sleeve are clamped on the outer peripheral surface of the nut. One end of the limiting support leg is connected to the second sleeve and extends towards the first sleeve side, and the other end passes through the valve stem and is clamped on the first sleeve.

[0005] By adopting the above technical solution, during installation, the flat side of the nut is adjusted to the same angle as the limiting support leg, and the second sleeve is arranged on one side of the nut. The limiting support leg passes through the valve stem and is clamped on the first sleeve, achieving the axial positioning effect of the first sleeve, the limiting support leg and the second sleeve with respect to the nut. The first sleeve is inserted on one side of the second sleeve, and the pressing fit with the first sleeve is achieved through the compression of the limiting support leg, so that the first sleeve and the second sleeve are clamped on the outer peripheral surface of the nut, thereby realizing the fixing effect of the first sleeve and the second sleeve on the nut, having the advantage of stable connection, and solving the problem of sealing failure between the seal and the valve seat during the operation of the angle seat valve.

[0006] The utility model is further arranged such that a plurality of clamping parts are arranged in an annular array on the first sleeve. The clamping part includes a connecting part and a positioning flange. One end of the connecting part is connected to the first sleeve, and the other end extends towards the bottom of the nut. One end of the positioning flange is connected to the connecting part, and the other end protrudes towards the valve stem. A plurality of positioning grooves are arranged in an annular array on the outer peripheral surface of the nut. The positioning flange is tightly pressed inside the positioning groove.

[0007] By adopting the above technical solution, the connecting part is used to release the abutting pressure outward during installation and bend outward appropriately. When the positioning flange slides into the positioning card slot, the connecting part releases the contraction pressure and forms a clamping with the outer circumference of the nut, achieving the locking and positioning function of the valve stem and the nut.

[0008] The present utility model is further configured such that the limiting support feet are provided with an extension part and a limiting part. One end of the extension part is connected to the second ferrule, and the other end extends toward the first ferrule. A plurality of installation slots for the extension part to pass through are formed on the valve stem. The extension part is provided with a limiting part, and the limiting part is bent and extended toward the outer peripheral surface of the first ferrule. A limiting opening for the limiting part to form a clamping connection is formed on the first ferrule.

[0009] By adopting the above technical solution, by compressing the limiting support feet, the extension part contracts inward and passes through the installation slots. When the limiting part slides to the limiting opening, the extension part can release the pressure, so that the limiting part is clamped on the outer peripheral surface of the limiting opening, achieving the axial limiting function of the valve stem and the nut.

[0010] The present utility model is further configured such that a plug-in part protrudes from the side of the second ferrule facing the first ferrule, and a positioning groove adapted to the plug-in part is provided on the side of the first ferrule facing the second ferrule, and the plug-in part is tightly abutted in the positioning groove.

[0011] By adopting the above technical solution, the provided plug-in part is used to form a clamping effect with the positioning groove of the first ferrule, thereby forming the plug-in connection between the first ferrule and the second ferrule, increasing the stability and firmness of the overall structure.

[0012] The present utility model is further configured such that a transition inclined surface is provided on the positioning flange facing the positioning card slot.

[0013] By adopting the above technical solution, the transition inclined surface provided on the positioning flange can avoid structural interference with the positioning card slot when installing the first ferrule, playing a role in guiding the positioning flange to insert into the positioning card slot, and making the installation more convenient.

[0014] The present utility model is further configured such that a rounded surface is provided on the limiting part.

[0015] By adopting the above technical solution, providing the rounded surface can improve the smoothness when the limiting part is inserted into the installation slot.

[0016] The present utility model is further configured such that two limiting support feet are symmetrically provided on the second ferrule, and a gap is provided between the two limiting support feet.

[0017] By adopting the above technical solution, when inserting the limiting support feet, the gap can enable the limiting support feet to be compressed inward, so that the limiting support feet are clamped with the first ferrule.

[0018] The utility model is further arranged such that three installation grooves are specifically formed through the valve stem. The installation grooves are formed by rotating around the axis of the valve stem and have equal spacing distances.

[0019] By adopting the above technical solution, setting three installation grooves can reduce the error formed between the limiting support feet and the valve stem during installation, shorten the torsional distance when the nut is not installed in place, and make the installation more convenient.

[0020] The utility model is further arranged such that the clamping assembly is specifically made of plastic material.

[0021] By adopting the above technical solution, the plastic material can have the characteristics of good flexibility, strong impact resistance and high compressive strength, thereby enhancing the locking effect of the clamping assembly on the valve stem and the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 is a cross-sectional view of the valve stem, clamping assembly and nut structure of the utility model;

[0024] Figure 3 is a schematic diagram of the structure of the clamping assembly of the utility model;

[0025] Figure 4 is a schematic diagram of the structure of the first ferrule of the utility model;

[0026] Figure 5 is a schematic diagram of the structure of the second ferrule of the utility model;

[0027] Figure 6 is a schematic diagram of the structure of the nut of the utility model.

[0028] In the figure: 1, valve body; 2, valve seat; 3, valve stem; 4, seal; 5, nut; 8, clamping assembly; 9, first ferrule; 10, second ferrule; 11, limiting support feet; 12, clamping part; 13, connecting part; 14, positioning flange; 15, positioning card slot; 16, extension part; 17, limiting part; 18, installation groove; 20, limiting opening; 21, inserting part; 23, positioning groove; 24, transition inclined plane; 25, rounded surface; 26, gap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment: As shown in the attached Figures 1 to 6 figure, a corner seat valve includes a valve body 1, a valve seat 2, a valve stem 3 and a seal 4. A nut 5 for locking the seal 4 and forming a sealing fit with the valve seat 2 is provided on the valve stem 3. A clamping assembly 8 for forming a limit and pressing against the nut 5 is provided on the valve stem 3. The clamping assembly 8 includes a first bushing 9, a second bushing 10 (the first bushing 9 and the second bushing 10 have the same structure), and a limit support foot 11 (the second bushing 10 and the limit support foot 11 are of an integral structure). The first bushing 9 and the second bushing 10 are clamped on the outer peripheral surface of the nut 5. One end of the limit support foot 11 is connected to the second bushing 10 and extends towards the first bushing 9, and the other end passes through the valve stem 3 and is clamped on the first bushing 9. During installation, the flat side of the nut 5 is adjusted to the same angle as the limit support foot 11, and the second bushing 10 is arranged on one side of the nut 5. The limit support foot 11 passes through the valve stem 3 and is clamped on the first bushing 9 to achieve the axial positioning effect of the first bushing 9, the limit support foot 11 and the second bushing 10 with the nut 5. The first bushing 9 is inserted on one side of the second bushing 10, and the pressing fit with the first bushing 9 is achieved through the compression of the limit support foot 11, so that the first bushing 9 and the second bushing 10 are clamped on the outer peripheral surface of the nut 5, thereby realizing the fixing effect of the first bushing 9 and the second bushing 10 on the nut 5, having the advantage of stable connection, and solving the problem of the sealing failure between the seal 4 and the valve seat 2 during the operation of the corner seat valve.

[0031] As shown in the attached Figure 2 figure, Figure 3 figure, Figure 6 and the attached figure, a plurality of clamping portions 12 (specifically six to eight) are arranged in an annular array on the first bushing 9. The clamping portion 12 includes a connecting portion 13 and a positioning flange 14 (which are of an integral structure). One end of the connecting portion 13 is connected to the first bushing 9, and the other end extends towards the bottom of the nut 5. One end of the positioning flange 14 is connected to the connecting portion 13, and the other end protrudes towards the valve stem 3. A plurality of positioning slots 15 (specifically six to eight) are arranged in an annular array on the outer peripheral surface of the nut 5. The positioning flange 14 is tightly abutted inside the positioning slot 15. The connecting portion 13 is used to release the pressure of the abutting contact towards the outside during installation and bend appropriately outwards. When the positioning flange 14 slides into the positioning slot 15, the connecting portion 13 releases the contraction pressure and forms a clamping with the outer periphery of the nut 5, achieving the locking and positioning effect of the valve stem 3 and the nut 5.

[0032] As shown in the attached Figure 2 and the attached Figure 3 As shown, an extension portion 16 and a limiting portion 17 (integral structure) are provided on the limiting support leg 11. One end of the extension portion 16 is connected to the second ferrule 10, and the other end extends toward the first ferrule 9. A plurality of mounting grooves 18 (specifically three) for the extension portion 16 to pass through are formed on the valve stem 3. A limiting portion 17 is provided on the extension portion 16. The limiting portion 17 is bent and extended toward the outer peripheral surface of the first ferrule 9. A limiting opening 20 for the limiting portion 17 to form a clamping connection is formed on the first ferrule 9. By compressing the limiting support leg 11, the extension portion 16 is contracted inward and passes through the mounting groove 18. When the limiting portion 17 slides to the limiting opening 20, the extension portion 16 can release the pressure, so that the limiting portion 17 is clamped on the outer peripheral surface of the limiting opening 20, achieving the axial limiting effect on the valve stem 3 and the nut 5.

[0033] As shown in the attached Figure 3 , the attached Figure 4 and the attached Figure 5 As shown, a plugging portion 21 (integral structure) is convexly provided on the second ferrule 10 toward the first ferrule 9. A positioning groove 23 adapted to the plugging portion 21 is provided on the first ferrule 9 toward the first ferrule 9. The plugging portion 21 is tightly abutted in the positioning groove 23. The provided plugging portion 21 is used to form a clamping effect with the positioning groove 23 of the first ferrule 9, thereby forming the plugging of the first ferrule 9 and the second ferrule 10, increasing the stability and firmness of the overall structure.

[0034] As shown in the attached Figure 2 , the attached Figure 3 and the attached Figure 6 As shown, a transition inclined surface 24 is provided on the positioning flange 14 toward the positioning card slot 15. The transition inclined surface 24 provided on the positioning flange 14 can avoid structural interference with the positioning card slot 15 when installing the first ferrule 9, playing a role in guiding the positioning flange 14 to insert into the positioning card slot 15, and making the installation more convenient.

[0035] As shown in the attached Figure 2 and the attached Figure 3 As shown, a rounded surface 25 is provided on the limiting portion 17. The provision of the rounded surface 25 can improve the smoothness when the limiting portion 17 is inserted into the mounting groove 18.

[0036] As shown in the attached Figure 2As shown, two limiting feet 11 are symmetrically arranged on the second ferrule 10, and a gap 26 is arranged between the two limiting feet 11. The limiting feet 11 can enhance the axial limiting effect of the nut 5 and the valve stem 3. When inserting the limiting feet 11, by setting the gap 26, the limiting feet 11 can be subjected to an inward compression effect, so that the limiting feet 11 are clamped with the first ferrule 9.

[0037] As shown in the Figure 2 attached drawings, three mounting grooves 18 are specifically formed through the valve stem 3. The mounting grooves 18 are formed by rotating around the axis of the valve stem 3 and have equal spacing distances. Arranging three mounting grooves 18 can reduce the error formed between the limiting feet 11 and the valve stem 3 during installation, shorten the torsional distance when the nut 5 is not installed in place, and make the installation more convenient.

[0038] As shown in the Figure 2 and the Figure 3 attached drawings, the clamping assembly 8 is specifically made of plastic material. The plastic material has the characteristics of good flexibility, strong impact resistance and high compressive strength, so as to enhance the locking effect of the clamping assembly 8 on the valve stem 3 and the nut 5.

[0039] In the present utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relationship words determined for the convenience of describing the structural relationship of each component or element of the present utility model, and do not specifically refer to any component or element in the present utility model, and should not be construed as a limitation to the present utility model.

Claims

1. An angle seat valve, comprising a valve body, a valve seat, a valve stem and a seal, wherein a nut for locking the seal and forming a sealing fit with the valve seat is provided on the valve stem, and is characterized in that: A clamping component (8) which forms a limit and fastening with the nut (5) is arranged on the valve stem (3). The clamping component (8) comprises a first clamping sleeve (9), a second clamping sleeve (10) and a limit support leg (11). The first clamping sleeve (9) and the second clamping sleeve (10) are clamped on the outer peripheral surface of the nut (5). One end of the limit support leg (11) is connected to the second clamping sleeve (10) and extends towards one side of the first clamping sleeve (9), and the other end passes through the valve stem (3) and is clamped on the first clamping sleeve (9).

2. The angle seat valve according to claim 1, wherein: A plurality of clamping parts (12) are arranged on the first clamping sleeve (9) in an annular array. The clamping part (12) comprises a connecting part (13) and a positioning flange (14). One end of the connecting part (13) is connected to the first clamping sleeve (9), and the other end extends towards the bottom of the nut (5). One end of the positioning flange (14) is connected to the connecting part (13), and the other end protrudes towards the valve stem (3). A plurality of positioning clamping grooves (15) are arranged on the outer peripheral surface of the nut (5) in an annular array. The positioning flange (14) is tightly abutted inside the positioning clamping groove (15).

3. The angle seat valve according to claim 1, characterized in that: An extension part (16) and a limit part (17) are arranged on the limit support leg (11). One end of the extension part (16) is connected to the second clamping sleeve (10), and the other end extends towards one side of the first clamping sleeve (9). A plurality of mounting grooves (18) for the extension part (16) to pass through are formed on the valve stem (3). A limit part (17) is arranged on the extension part (16). The limit part (17) extends and bends towards the outer peripheral surface of the first clamping sleeve (9). A limit opening (20) for the limit part (17) to form a clamping connection is formed on the first clamping sleeve (9).

4. The angle seat valve according to claim 1, wherein: A plugging part (21) protrudes on one side of the second clamping sleeve (10) towards the first clamping sleeve (9). A positioning groove (23) adapted to the plugging part (21) is arranged on one side of the first clamping sleeve (9) towards the second clamping sleeve (10). The plugging part (21) is tightly abutted in the positioning groove (23).

5. The angle seat valve according to claim 2, wherein: An inclined surface (24) is arranged on one side of the positioning flange (14) towards the positioning clamping groove (15).

6. The angle seat valve according to claim 3, wherein: A rounded surface (25) is arranged on the limit part (17).

7. A corner seat valve according to claim 1, characterized in that: Two limit support legs (11) are symmetrically arranged on the second clamping sleeve (10), and a gap (26) is arranged between the two limit support legs (11).

8. The angle seat valve according to claim 3, characterized in that: Specifically, three mounting grooves (18) are arranged through the valve stem (3). The mounting grooves (18) are rotationally formed around the axis of the valve stem (3) and have equal spacing distances.

9. The angle seat valve according to claim 1, wherein: The clamping component (8) is specifically made of plastic material.

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