Labor-saving type first installation structure of valve actuator

Abstract

The utility model relates to a labor-saving type first installation structure of a valve actuator. The labor-saving type first installation structure comprises an actuator body. The actuator body comprises a base, a stroke column and a shell, and a first open ring is rotatably installed on the base and arranged on the stroke column in a sleeving mode. The rotation path of the first open ring is limited by the base, the first open ring plays a role in supporting the stroke column in the rotation process, and a jacking block used for supporting a protruding structure on the outer circle surface of the stroke column and a reset elastic piece used for abutting against the inner wall of the shell and pushing the first open ring to reset are formed on the first open ring. The first open ring is additionally arranged on the base, the stroke column is supported by the first open ring, and the axial thrust needing to be overcome by an operator during installation is remarkably weakened.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve automatic control technical field especially a valve actuator labor saving type first installation structure. BACKGROUND

[0002] The valve actuator is internally provided with compression spring, and the pre-tightening force of the compression spring is usually large, and in the prior art, the pre-tightening force can be set to more than 10 kg (industry specification) ; in addition, the pre-tightening force of the valve core spring (generally more than 4 kg), the axial thrust caused by the pre-tightening force of the actuator and the valve core spring needs to be overcome during installation so that the valve can be correctly installed.

[0003] The initial pre-tightening force of the spring is 10+4 kg, and as the spring is compressed during installation, the force required for installation will linearly increase, and after the actuator spring is compressed by 3 mm, the force will increase by 18 N and 1.8 kg, and the force required for installing the valve will also linearly increase. UTILITY MODEL CONTENTS

[0004] In view of the above-mentioned shortcomings in the prior production technology, the applicant provides a valve actuator labor saving type first installation structure with a reasonable structure, which adds a first opening ring on the basis of the prior art, can reduce the resistance during first installation, and can be repeatedly used.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A valve actuator labor saving type first installation structure, comprising an actuator body; the actuator body comprises a base, a stroke column and a shell, a first opening ring is rotatably installed on the base, and the first opening ring is sleeved on the stroke column; the rotation path of the first opening ring is limited by the base, and the first opening ring plays a supporting role on the stroke column during rotation,

[0007] A first opening ring is rotatably installed on the base, and the first opening ring is sleeved on the stroke column; the rotation path of the first opening ring is limited by the base, and the first opening ring plays a supporting role on the stroke column during rotation,

[0008] A first opening ring is rotatably installed on the base, and the first opening ring is sleeved on the stroke column; the rotation path of the first opening ring is limited by the base, and the first opening ring plays a supporting role on the stroke column during rotation,

[0009] A first opening ring is rotatably installed on the base, and the first opening ring is sleeved on the stroke column; the rotation path of the first opening ring is limited by the base, and the first opening ring plays a supporting role on the stroke column during rotation,

[0010] As a further improvement of the above technical scheme:

[0011] The ring body adopts an open ring; the central angle corresponding to the open part is smaller than the central angle corresponding to the solid part.

[0012] The top-up blocks and the reset elastic members are arrayed on the ring body; the spacing between the top-up blocks is greater than the spacing between the reset elastic members.

[0013] The height of the top-up block is less than the top-up limit height of the stroke column.

[0014] The top profile of the jacking block is an inverted slope.

[0015] The reset elastic member comprises an extension part, a deformation section extending from the extension part, and a moving end of the deformation section.

[0016] The inner wall of the shell is formed with a contact rib plate, the bottom end of the contact rib plate is arc-shaped, and the moving end of the deformation section is arranged close to the bottom end of the contact rib plate.

[0017] The extension part comprises a flat extension section and a longitudinal extension section, and the flat extension section and the contact rib plate are oppositely arranged to compensate for the spacing between the shell and the first opening ring.

[0018] The base is provided with a limiting rib, and the rotating path of the ring body is limited by the limiting rib.

[0019] The beneficial effects of the utility model are as follows:

[0020] The utility model has the advantages of compact and reasonable structure, convenient operation, and reduced initial installation resistance by increasing the first opening ring on the base, solves the problem of 14kg axial installation resistance caused by the superposition of the pre-tightening force (10kg) in the actuator and the valve thrust (4kg) when the existing electric actuator is installed for the first time, and makes the manual installation force meet the recommended range (≤8kg) of the ASME B16.34 standard.

[0021] The application reduces the resistance peak value from 14kg to 0kg by lifting the initial contact position of the actuator and the valve core by 4mm. Since the force at the initial installation stage is the smallest (10kg+4kg), the force linearly increases as the spring is compressed; after reducing the initial stage force to 0kg, the force required for subsequent valve installation is also greatly reduced.

[0022] The application can also realize the reversibility of the resistance reduction function, overcome the defect that the existing temporary resistance reduction mechanism cannot be reset, provide a control mechanism that can automatically fail after installation is completed and can be repeatedly activated by mechanical or electrical signals, meet the repeated installation and system pressure test requirements after maintenance and disassembly (refer to GB / T 17446 Sealing Element Reliability Test Method), and support more than 50 times of repeated use; the first opening ring can be clockwise and counterclockwise reversed, and can be reset to the initial state after completing the supporting action, achieving the purpose of multiple reuse, and supporting more than 50 times of repeated use; the initial installation resistance deviation rate is still less than 5% during repeated installation.

[0023] The application can reduce the dynamic wear of the sealing surface, eliminate the forced relative sliding of the actuator and the valve core sealing surface during installation, and reduce the O-ring wear rate to less than 1 / 3 of the traditional scheme (refer to ASTM D1414 Standard Test Method).

[0024] This application improves structural compatibility, and without changing the interface size between the actuator and the manifold, it adapts to existing standard valve bodies while maintaining the original sealing performance (meeting the requirements of GB / T 13927 valve pressure test). Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the valve actuator of the present invention.

[0026] Figure 2 This is a schematic diagram of the hidden housing structure of the valve actuator of the present invention.

[0027] Figure 3 This is a schematic diagram of the first open-loop structure of the present invention.

[0028] Figure 4 This is a schematic diagram of the first open-loop structure from another perspective of the present invention.

[0029] Figure 5 This is a schematic diagram of the base structure of the present invention.

[0030] Figure 6 This is a schematic diagram of the outer shell structure of the present invention.

[0031] Figure 7 This is a schematic diagram of the outer shell and the first open ring of the present invention in a mating state.

[0032] The components include: 1. base; 2. stroke column; 3. outer shell; 4. initial opening ring; 5. compression spring;

[0033] 101. Limiting reinforcement;

[0034] 301. Confrontation ribs;

[0035] 401. Ring body; 402. Lifting block; 403. Reset elastic element; 404. Flat extension section; 405. Longitudinal extension section; 406. Deformation section; 407. Stroke block; 408. Ejector pin. Detailed Implementation

[0036] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0037] like Figures 1-7 As shown, the valve actuator of this embodiment has a labor-saving first-installation structure, including an actuator body. The actuator body includes a base 1, a stroke column 2, and a housing 3. A first-opening ring 4 is rotatably mounted on the base 1 and is sleeved on the stroke column 2. The rotation path of the first-opening ring 4 is restricted by the base 1. During the rotation of the first-opening ring 4, it supports the stroke column 2.

[0038] The first ring 4 is formed as follows:

[0039] The jacking block 402 is arranged on the outer surface of the stroke column 2 to support the convex structure,

[0040] The reset elastic member 403 is arranged on the inner wall of the shell 3 to push the first opening ring 4 to reset.

[0041] The ring body 401 is an open ring, and the central angle corresponding to the open part is smaller than the central angle corresponding to the solid part.

[0042] The jacking block 402 and the reset elastic member 403 are arranged on the ring body 401 in an array, and the spacing between the jacking blocks 402 is greater than the spacing between the reset elastic members 403.

[0043] The height of the jacking block 402 is less than the jacking limit height of the stroke column 2.

[0044] The top profile of the jacking block 402 is an inverted inclined surface.

[0045] The reset elastic member 403 comprises an extension part, a deformation section 406 extending from the extension part, and a movement end of the deformation section 406, and the connection end of the deformation section 406 is located below the vertical direction.

[0046] The inner wall of the shell 3 is formed with a contact rib plate 301, and the bottom end of the contact rib plate 301 is arc-shaped, and the movement end of the deformation section 406 is arranged close to the bottom end of the contact rib plate 301.

[0047] The extension part comprises a flat extension section 404 and a longitudinal extension section 405, and the flat extension section 404 is arranged opposite to the contact rib plate 301 to compensate the spacing between the shell 3 and the first opening ring 4.

[0048] The base 1 is provided with a limiting rib 101, and the rotation path of the ring body 401 is limited by the limiting rib 101.

[0049] The specific structure and working process of the application are as follows:

[0050] The valve actuator is internally provided with a compression spring 5, and the pre-tightening force of the compression spring 5 is usually large. In some prior art, the pre-tightening force is set to 10 kg. In addition to the reaction force of the valve core fluid, the compression of the sealing surface is realized. Under this structure, the resistance in the initial installation stage is large, which is the sum of the pre-tightening force and the reaction force, and a large axial thrust needs to be overcome during installation.

[0051] The high initial resistance is concentrated on the installation starting stage, and the resistance of the first 3 mm of stroke needs to be overcome by 90%, which causes difficulty in force exertion for the operator; and the spring pre-tightening force decays significantly after multiple disassembly and assembly, and the service life decays rapidly.

[0052] The reset elastic member 403 generates elastic expansion force to cooperate with the fixed position support structure to achieve the purpose of expanding the closing size; and the thrust of the first opening spring generates the function of repeatedly setting the first installation position.

[0053] As Figure 2 shown, the application is based on the conventional actuator, and a first open loop 4 is added. Figure 3 and Figure 4 As shown, the first open loop 4 includes a ring body 401, a top lifting block 402 is formed on the top surface of the ring body 401, and a reset elastic member 403 is formed on the outer wall of the ring body 401, which is set to a deformable structure tending to a triangle. Specifically, the reset elastic member 403 includes a flat section 404 located on the diameter of the ring body 401, and a deformable structure of a triangle is connected to the end of the flat section 404 away from the ring body 401. The deformable structure includes a vertical longitudinal section 405 connected to the flat section 404, and a deformation section 406 with an acute angle between the longitudinal section 405. In order to facilitate deformation reset, the longitudinal section 405 and the deformation section 406 form an open triangular structure, and the angle between the longitudinal section 405 and the deformation section 406 is rounded to reduce the probability of deformation damage.

[0054] Correspondingly, as Figure 6 and Figure 7 shown, a contact rib plate 301 is formed on the inner wall of the shell 3, and the bottom end profile of the contact rib plate 301 adopts an arc profile combined with a straight line section and a curved section. When the deformation section 406 of the reset elastic member 403 rotates with the ring body 401, the bottom end of the deformation section 406 first contacts the bottom end of the contact rib plate 301, and as the rotation progresses, the deformation section 406 gradually approaches the contact rib plate 301 and is pressed by the contact rib plate 301 to the longitudinal section 405, forming an elastic potential energy of deformation. When the rotation force is removed and the pressure applied by the stroke column 2 to the top lifting block 402 of the ring body 401 is removed, the elastic potential energy pushes the ring body 401 to reset.

[0055] As Figure 2 shown, a stroke block 301 is also formed on the outer wall of the ring body 401. The thickness of the stroke block 301 is the same as the thickness of the ring body 401, and the purpose of the stroke block 301 is to limit the rotation path length of the first open loop 4; one of the stroke blocks 301 corresponds to an increase in the end area at a certain position on the first open loop 4, so as to provide a top lifting block 402 at the position where the area is increased and support the bottom end of the top lifting block 402.

[0056] The function of the first open loop 4 is to lift the stroke column 2, and the outer circular profile of the stroke column 2 has a rib plate and a top block arranged in an annular array, wherein the top block is a protruding structure on the stroke column 2. The top lifting block 402 on the first open loop 4 is used to support the top block, and plays a supporting role on the top block and the stroke column 2.

[0057] The first open loop 4 is placed on the base 1, as Figure 5As shown, the circumference of the base 1 is shaped with a limiting rib 101, and the end of the limiting rib 101 pointing to the center is close to the first opening ring 4, which limits the first opening ring 4. The travel block 301 on the first opening ring 4 falls between two adjacent limiting ribs 101, and when the travel block 301 rotates with the first opening ring 4, the movement path is the arc distance between the two adjacent limiting ribs 101, which prevents the protrusion and the travel column 2 from being difficult to align due to too large rotation angle.

[0058] As an optimized embodiment of the present embodiment, the travel block 301 on the first opening ring 4 is designed as follows: when the travel block 301 moves close to one side limiting rib 101, the protrusion can just fall below the top block of the travel column 2, and the limiting rib 101 simultaneously plays the role of auxiliary positioning and auxiliary alignment.

[0059] The working process of the actuator of the present embodiment is as follows:

[0060] After the first installation function is set, the travel column 2 is first lifted by 4 mm, and the lifting here is the prior art, which is simply explained as follows:

[0061] In the production process, the actuator is inverted, and pressure is applied from top to bottom through a special jig, and the pressure acts on the Figure 6 The actuator bottom concave position as shown, and the pressing displacement is 4 mm, that is, the travel column 3 is first lifted by 4 mm. At the same time, the top needle 408 with a slope surface drives the reset structure of the first opening ring 1, so that the first opening ring 1 rotates to the expected position.

[0062] After the initial lifting is completed, the first opening ring 4 rotates to the expected angle, and at this time the protrusion of the first opening ring 4 is just below the top block, supporting the top block and the travel column 2, and the reset elastic element 403 is in a compressed state at this time. The counterforce of the compression spring 5 sleeved on the travel column 2 is applied to the travel column 2 and the first opening ring 4, which compresses and limits the first opening ring 4. At this time, the travel column 2 is lifted by 4 mm by the first opening ring 4.

[0063] When the actuator is powered on, the thermal expansion body built in the travel column 2 is heated and expanded to support the travel column 2 to continue lifting, and when the lifting height is greater than 4 mm, the pressure on the first opening ring 4 disappears, and at this time the reset force of the reset elastic element 403 acts to push the first opening ring 4 back to the initial position.

[0064] After the actuator is powered off and the thermal expansion body is contracted, since there is no support of the first opening ring 4 below the top block, the travel column 2 is completely pushed to the bottom under the action of the compression spring 5, and the valve is closed.

[0065] When the first installation function needs to be reset, the first installation function can be reset by pushing the travel column 2 from the bottom of the actuator to be higher than 4 mm, rotating the first opening ring 4 to a fixed angle, and then removing the bottom pushing force.

[0066] The application has the advantages that a first opening ring is added in the actuator, a 4mm protrusion on the first opening ring is used, when the protrusion is rotated to a preset position, the main spring in the actuator is compressed by 4mm, the contact position with the valve core is raised by 4mm, and 0 resistance is realized when the actuator is installed to the distribution valve. Meanwhile, the structure can be manually reset, and is convenient for installation personnel to repeatedly install and use. The existing electric heating actuator needs to overcome the superposition of the pre-tightening force (10kg) in the actuator and the valve thrust (4kg) at the same time during the first installation, and the problem of 14kg axial installation resistance is solved, the manual installation force meets the recommended range (≤8kg) of the ASME B16.34 standard, the reversibility of the reduction resistance function is realized, the dynamic wear of the sealing surface is reduced, and the compatibility of the structure is improved.

[0067] The above description is an explanation of the utility model, not a limitation of the utility model, the range defined by the utility model is referred to the claims, and any form of modification can be made within the protection range of the utility model.

Claims

1. A labor-saving first installation structure of a valve actuator, comprising an actuator body; the actuator body comprises a base (1), a stroke column (2), and a shell (3), characterized in that: A first open ring (4) is rotatably installed on the base (1) and is sleeved on the stroke column (2); the rotation path of the first open ring (4) is limited by the base (1), and the first open ring (4) plays a supporting role on the stroke column (2) during rotation, The first open ring (4) is formed with: A jacking block (402) for supporting the protruding structure on the outer circular surface of the stroke column (2), A reset elastic member (403) for abutting against the inner wall of the shell (3) and pushing the first open ring (4) to reset.

2. The valve actuator labor-saving primary installation structure according to claim 1, characterized by: The first open ring (4) is an open ring, and the central angle of the open part is smaller than that of the solid part.

3. The valve actuator labor-saving primary installation structure according to claim 1, characterized by: The jacking block (402) and the reset elastic member (403) are arrayed on the ring body (401); the spacing between the jacking blocks (402) is greater than that between the reset elastic members (403).

4. The valve actuator labor-saving primary installation structure according to claim 1, characterized by: The height of the jacking block (402) is less than the jacking limit height of the stroke column (2).

5. The valve actuator labor-saving primary installation structure according to claim 1, characterized by: The top profile of the jacking block (402) is an inverted inclined surface.

6. The valve actuator labor-saving primary installation structure according to claim 1, characterized by: The reset elastic member (403) includes an extension part and a deformation section (406) extending from the extension part, and the movement end of the deformation section (406) is located below the vertical orientation of the connection end of the deformation section (406).

7. The valve actuator labor-saving primary installation structure according to claim 6, characterized by: The inner wall of the shell (3) is formed with an abutting rib plate (301), and the bottom end of the abutting rib plate (301) is arc-shaped, and the movement end of the deformation section (406) is arranged close to the bottom end of the abutting rib plate (301).

8. The valve actuator labor-saving primary installation structure according to claim 7, characterized by: The extension part includes a flat extension section (404) and a longitudinal extension section (405), and the flat extension section (404) and the abutting rib plate (301) are oppositely arranged to compensate for the spacing between the shell (3) and the first open ring (4).

9. The valve actuator labor-saving primary installation structure according to claim 1, characterized by: The base (1) is provided with a limiting rib (101), and the rotation path of the ring body (401) is limited by the limiting rib (101).

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