A high-precision positioning shut-off valve capable of high-speed opening and closing and its use method

Abstract

The present invention discloses a high-precision positioning shut-off valve capable of high-speed opening and closing, comprising a valve body, a valve core structure arranged inside the valve body and capable of moving upward or downward, and a servo electric cylinder arranged at the upper end of the valve body, wherein the output end of the servo electric cylinder extends downward into the valve body and is connected to the valve core structure. After the servo electric cylinder is connected to the valve core structure, it can drive the valve core structure to move within the valve body. When the servo electric cylinder drives the valve core structure to move upward, it can open the shut-off valve, and when the servo electric cylinder drives the valve core structure to move downward, it can close the shut-off valve. A guide rail assembly is arranged on the side of the valve core structure, and the guide rail assembly includes a first guide rail assembly and a second guide rail assembly, and the first guide rail assembly and the second guide rail assembly are respectively arranged on both sides of the valve core structure. In addition, the present invention also discloses a method for using a high-precision positioning shut-off valve capable of high-speed opening and closing. The present invention has the advantages of short opening and closing time, high positioning accuracy, high limit accuracy, low impact vibration, and low noise.

Description

Technical Field

[0001] The present invention relates to the technical field of valve equipment, and in particular to a high-precision positioning shut-off valve capable of achieving high-speed opening and closing; in addition, the present invention also relates to a method for using the shut-off valve. Background Art

[0002] At present, the shut-off valves on the market mainly include various structural types of shut-off valves such as baffle valves, plug valves, butterfly valves, and ball valves. Among them, the full-bore valves include baffle valves, plug valves, and ball valves. For valves of the same caliber, baffle valves and ball valves are larger in size (the structure is suitable for small-diameter valves) and occupy a larger installation space, while plug valves have a compact structure and occupy a smaller installation space.

[0003] Shut-off valves are driven in four main ways: electric (motor + T-screw), pneumatic, hydraulic, and manual. For valves of the same caliber and structure, hydraulic systems close faster than both pneumatic and electric systems. However, hydraulic systems are cumbersome to maintain and can easily contaminate the site. For valves with a diameter width greater than 300mm in the direction of motion, the valve movement time is greater than 2s. Therefore, pneumatic and electric valves are more commonly used on the market. Pneumatic valves experience high impact vibration and poor positioning accuracy, while electric valves (motor + T-screw) have slow movement speeds. Some research institutes and enterprises require medium-to-large valves (diameter width greater than 300mm in the direction of motion) that simultaneously meet full bore requirements, high-speed opening and closing (opening and closing time less than 1.5s), high-precision positioning, minimal vibration and low noise. These traditional shut-off valve drive methods and valve structures are unable to meet these requirements. The circulating medium contains corrosive gases and dust. Summary of the Invention

[0004] The object of the present invention is to provide a high-precision positioning shut-off valve that can be opened and closed at high speed. The valve can be used for rapid opening and closing in situations where the medium contains a small amount of corrosive gas, dust, expensive gas, and has low impact vibration and noise. It has the advantages of precise positioning and full-diameter flow diversion. In addition, the present invention also discloses a method for using the high-precision positioning shut-off valve that can be opened and closed at high speed.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] 1. The basic concept of the present invention is as follows:

[0007] The present invention adopts a servo electric cylinder to drive the valve core. The internal valve core guide structure adopts a double guide rail structure (one side is a linear rail, the other side is a U-shaped guide rail). The valve core structure is divided into two parts (sealing structure and guide ring structure). The servo electric cylinder can accurately control the movement stroke of the electric cylinder. This research and development technology is a valve with a caliber of (500mm (width) × 2000mm (length)) and a valve core weight of 650KG. The maximum movement speed of the valve can reach 1m / s, the valve opening and closing movement time is ≤1.2s, and the control accuracy can reach 0.02mm. The linear rail is used for the left and right and front and back limit of the valve core guide ring (limit accuracy <0.05mm), and the U-shaped guide rail is used for the front and back limit of the valve core (limit accuracy <0.2mm). When the valve is fully opened, the valve core guide ring is aligned with the valve channel interface, and the single-sided distance from the panel is 0.3-0.4mm. It can effectively reduce the circulating medium from entering the valve core, and has good applicability for working occasions where the circulating medium contains dust, corrosive gases and expensive gases.

[0008] 2. The specific scheme of the present invention is as follows:

[0009] A high-precision positioning shut-off valve capable of high-speed opening and closing comprises a valve body, a valve core structure disposed inside the valve body and capable of moving upward or downward, and a servo electric cylinder disposed at the upper end of the valve body. The output end of the servo electric cylinder extends downward into the valve body and is connected to the valve core structure. After the servo electric cylinder is connected to the valve core structure, it can drive the valve core structure to move within the valve body. When the servo electric cylinder drives the valve core structure to move upward, the shut-off valve is opened. When the servo electric cylinder drives the valve core structure to move downward, the shut-off valve is closed.

[0010] A guide rail assembly is provided on the side of the valve core structure, and the guide rail assembly includes a first guide rail assembly and a second guide rail assembly. The first guide rail assembly and the second guide rail assembly are respectively provided on both sides of the valve core structure. The first guide rail assembly is a linear rail assembly, and the second guide rail assembly is a U-shaped guide rail assembly.

[0011] Among them, the valve core structure includes a sealing structure and a guide ring. The valve core structure is connected to the servo electric cylinder. The guide ring is arranged at the lower end of the sealing structure. When the shut-off valve is opened, the guide ring is flush with the valve channel interface.

[0012] Further optimized, the linear rail assembly includes a linear rail and at least one slider, the linear rail is vertically arranged in the valve body, the slider is installed on the valve core structure, and the slider and the linear rail cooperate with each other.

[0013] There are two sliders, which are respectively located on the sides of the valve core structure.

[0014] Among them, the U-shaped guide rail assembly includes a U-shaped guide rail and an adjustable roller assembly, the U-shaped guide rail is arranged in the valve body, and the adjustable roller assembly includes a mounting seat, a first roller and a second roller, the mounting seat is fixedly installed on the side of the valve core structure, the first roller and the second roller are installed on the mounting seat, and the distance between the first roller and the second roller can be adjusted. After the mounting seat is installed on the side of the valve core structure, the first roller and the second roller can contact the guide surface of the U-shaped guide rail.

[0015] The sealing structure is a gate plate that is movable in the valve body.

[0016] In addition, the present invention also discloses a method for using a high-precision positioning shut-off valve capable of high-speed opening and closing. The shut-off valve is installed in a pipeline system where the circulating medium contains corrosive gas or dust. When the shut-off valve needs to be opened, the servo electric cylinder is activated, which drives the valve core structure to move upward so that the guide ring in the valve core structure is flush with the valve channel interface, thereby achieving the valve opening.

[0017] When the shut-off valve needs to be closed, the servo electric cylinder is started, and the servo electric cylinder drives the valve core structure to move downward, so that the sealing structure in the valve core structure cuts off the valve channel interface to close the valve.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention sets a first guide rail assembly and a second guide rail assembly on the side of the valve core structure, wherein the first guide rail assembly is a linear rail assembly and the second guide rail assembly is a U-shaped guide rail assembly, and a servo electric cylinder is set on the valve body. The servo electric cylinder drives the valve core structure to move up and down to realize the rapid opening and closing of the valve, and uses the servo electric cylinder to accurately control the movement stroke of the internal valve core. When the valve is opened, the alignment degree of the guide ring and the channel interface can be accurately controlled. The positioning accuracy can reach 0.02mm when the valve moves, which can achieve the purpose of high-precision control. A dual-rail guide structure (linear rail and U-shaped rail) is used to limit the guide ring in the left and right and front and back directions. The left and right limits rely on the linear rail, and the limit accuracy can reach 0.05mm. The front and back limits in the direction of the panel rely on double rollers and U-shaped rails with adjustable distances, and the control accuracy can reach 0.2mm. Therefore, it can be ensured that when the valve is opened, the clearance between the guide ring and the entire valve channel interface is controlled at 0.3-0.4mm on all four sides, which can effectively prevent the circulating medium from entering the valve body. It is very suitable for application environments where the circulating medium contains corrosive gases, dust or expensive gases.

[0020] In addition, the present invention can also be used in wind tunnel environment simulation experiments to reduce the influence of vortexes formed inside the valve body when wind speed passes through on the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 For the present invention Figure 1 Sectional view of the middle AA plane.

[0024] Figure 3 This is a schematic structural diagram of the guide ring of the present invention when it is aligned with the valve channel interface.

[0025] Figure 4 It is a schematic structural diagram of the U-shaped guide rail assembly of the present invention.

[0026] Figure 5 Schematic diagram of the linear rail assembly structure of the present invention.

[0027] Figure 6 This is a schematic diagram of the relationship between the opening and closing time and the rotation speed of the present invention.

[0028] Figure markings: 1-valve body, 2-servo electric cylinder, 3-valve core structure, 4-first guide rail assembly, 5-linear rail, 6-slider, 7-second guide rail assembly, 8-U-shaped guide rail, 9-adjustable roller assembly, 10-mounting seat, 11-first roller, 12-second roller, 13-sealing structure, 14-guide ring, 15-valve channel interface. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the embodiments. The embodiments described are only a part of the embodiments of the present invention and are not all embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without making creative work are all within the scope of protection of the present invention.

[0030] Example 1

[0031] This embodiment discloses a high-precision positioning shut-off valve capable of high-speed opening and closing, comprising a valve body 1, a valve core structure 3 disposed within the valve body 1 and capable of moving upward or downward, and a servo electric cylinder 2 disposed at the upper end of the valve body 1. The output end of the servo electric cylinder 2 extends downward into the valve body 1 and is connected to the valve core structure 3. After the servo electric cylinder 2 is connected to the valve core structure 3, it can drive the valve core structure 3 to move within the valve body 1. When the servo electric cylinder 2 drives the valve core structure 3 to move upward, the shut-off valve is opened. When the servo electric cylinder 2 drives the valve core structure 3 to move downward, the shut-off valve is closed.

[0032] A guide rail assembly is provided on the side of the valve core structure 3, and the guide rail assembly includes a first guide rail assembly 4 and a second guide rail assembly 7. The first guide rail assembly 4 and the second guide rail assembly 7 are respectively provided on both sides of the valve core structure 3. The first guide rail assembly 4 is a linear rail assembly, and the second guide rail assembly 7 is a U-shaped guide rail assembly.

[0033] In this embodiment, the first guide rail assembly 4 is arranged on the left side of the valve core structure 3 , and the second guide rail assembly 7 is arranged on the right side of the valve core structure 3 .

[0034] Among them, the valve core structure 3 includes a sealing structure 13 and a guide ring 14. The valve core structure 3 is connected to the servo cylinder 2. The guide ring 14 is arranged at the lower end of the sealing structure 13. When the shut-off valve is opened, the guide ring 14 is flush with the valve channel interface 15.

[0035] In this embodiment, the sealing structure 13 is a gate plate that is movably disposed in the valve body 1 .

[0036] It is further defined that the linear rail assembly includes a linear rail 5 and at least one slider 6 , the linear rail 5 is vertically arranged in the valve body 1 , the slider 6 is installed on the valve core structure 3 , and the slider 6 cooperates with the linear rail 5 .

[0037] It should be noted that, in this embodiment, there are two sliders 6 , which are respectively located on the sides of the valve core structure 3 . In actual use, they can also be located on the sides of the guide ring 14 .

[0038] Among them, the U-shaped guide rail assembly includes a U-shaped guide rail 8 and an adjustable roller assembly 9, the U-shaped guide rail 8 is arranged in the valve body 1, and the adjustable roller assembly 9 includes a mounting seat 10, a first roller 11 and a second roller 12, the mounting seat 10 is fixedly installed on the side of the valve core structure 3, the first roller 11 and the second roller 12 are installed on the mounting seat 10, and the distance between the first roller 11 and the second roller 12 can be adjusted. After the mounting seat 10 is installed on the side of the valve core structure 3, the first roller 11 and the second roller 12 can contact the guide surface of the U-shaped guide rail 8.

[0039] This embodiment mainly discloses a rectangular plug-in valve, so its guide ring 14 is rectangular. For a closed-end valve with a circular valve diameter, the guide ring 14 can also be designed to be circular.

[0040] The present invention has the advantage of short opening and closing times. In actual use, the valve is opened or closed by driving the valve core structure 3 upward or downward via the servo electric cylinder 2. For a rectangular gate valve with a diameter of 500mm (width) x 2000mm (length) and a valve core weight of 650kg, the maximum movement speed can reach 1m / s, and the valve opening and closing time is ≤1.2s. This is faster and has a shorter response time than hydraulic, pneumatic, and electric (motor + T-screw) drive methods.

[0041] The present invention has the advantage of high positioning accuracy. By using the servo electric cylinder 2 to precisely control the movement stroke of the valve core structure 3, the alignment of the guide ring 14 and the channel interface can be precisely controlled when the valve is open, and the positioning accuracy during valve movement can reach 0.02mm.

[0042] The present invention has the advantage of high limiting precision. The purpose of double guide rail guidance is achieved by setting the first guide rail assembly 4 and the second guide rail assembly 7; wherein, the first guide rail assembly 4 is a linear rail assembly, and the second guide rail assembly 7 is a U-shaped guide rail assembly, which can limit the left and right directions and the front and back directions of the guide ring 14; the left and right direction limitation depends on the linear rail assembly, and its limiting precision can reach 0.05mm; the front and back limitation of the guide ring 14 and the valve body 1 panel direction can be achieved by relying on the U-shaped guide rail assembly, because the U-shaped guide rail assembly includes a U-shaped guide rail 8 and an adjustable roller assembly 9, the U-shaped guide rail 8 is arranged in the valve body 1, and the adjustable roller assembly 9 includes a mounting seat 10, a first roller 11 and a second roller 12, and the mounting seat 10 is fixedly installed on the side of the valve core structure 3 The first roller 11 and the second roller 12 are mounted on the mounting seat 10, and the spacing between the first roller 11 and the second roller 12 is adjustable. After the mounting seat 10 is installed on the side of the valve core structure 3, the first roller 11 and the second roller 12 can contact the guide surface of the U-shaped guide rail 8. In this way, in actual use, the distance between the first roller 11 and the second roller 12 can be adjusted to achieve front-to-back position limiting. Therefore, when the valve is open, the clearance between the guide ring 14 and the entire valve channel interface is controlled at 0.3-0.4mm on all four sides, which can effectively prevent the circulating medium from entering the valve body 1. It is very suitable for application environments where the circulating medium contains corrosive gases, dust, or expensive gases. It can also be used in wind tunnel environment simulation experiments to reduce the impact of vortices formed inside the valve body 1 when wind speed passes through on the test results.

[0043] The present invention has the advantages of low impact vibration and low noise. The servo electric cylinder 2 drives the valve core structure 3, accurately controlling the stroke of the valve core structure 3. This can effectively solve the problem of large-scale valves experiencing large impact vibration and high noise during rapid movement, and has good applicability to system equipment.

[0044] The present invention has a compact structure, the servo electric cylinder 2 is an integrated driving component, and is a mature driving component, with a simple and beautiful appearance and strong universal interchangeability.

[0045] Example 2

[0046] This embodiment discloses a method for using a high-precision positioning shut-off valve capable of high-speed opening and closing. The shut-off valve is installed in a pipeline system where the circulating medium contains corrosive gas or dust. The shut-off valve is the high-precision positioning shut-off valve capable of high-speed opening and closing described in Example 1.

[0047] When the shut-off valve needs to be opened, the servo electric cylinder 2 is started, and the servo electric cylinder 2 drives the valve core structure 3 to move upward, so that the guide ring 14 in the valve core structure 3 is flush with the valve channel interface 15, so that the valve can be opened;

[0048] When the shut-off valve needs to be closed, the servo electric cylinder 1 is started, and the servo electric cylinder 1 drives the valve core structure 3 to move downward, so that the sealing structure 13 in the valve core structure 3 cuts off the valve channel interface 15, thereby closing the valve.

[0049] The present invention is mainly used for rapid opening and closing of media where there is a small amount of corrosive gas, dust, expensive gas, and where the impact vibration and noise are small. It has the advantages of precise positioning and full-diameter flow guidance.

[0050] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as covering the preferred embodiments and all changes and modifications that fall within the scope of the invention. The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A high-precision positioning shut-off valve capable of high-speed opening and closing, characterized by: It includes a valve body, a valve core structure arranged inside the valve body and capable of moving upward or downward, and a servo electric cylinder arranged at the upper end of the valve body. The output end of the servo electric cylinder extends downward into the valve body and is connected to the valve core structure. After the servo electric cylinder and the valve core structure are connected, they can drive the valve core structure to move within the valve body. The control accuracy reaches 0.02mm. When the servo electric cylinder drives the valve core structure to move upward, it can open the shut-off valve, and the opening and closing time is ≤1.2s. When the servo electric cylinder drives the valve core structure to move downward, it can close the shut-off valve. A guide rail assembly is provided on the side of the valve core structure, and the guide rail assembly includes a first guide rail assembly and a second guide rail assembly. The first guide rail assembly and the second guide rail assembly are respectively provided on both sides of the valve core structure. The first guide rail assembly is a linear rail assembly, and the second guide rail assembly is a U-shaped guide rail assembly. The valve core structure includes a sealing structure and a guide ring. The valve core structure is connected to the servo electric cylinder. The guide ring is set at the lower end of the sealing structure. When the shut-off valve is opened, the guide ring is flush with the valve channel interface and the clearance on all four sides is 0.3-0.4mm. The linear rail assembly includes a linear rail and at least one slider, the linear rail is vertically arranged in the valve body, the slider is installed on the valve core structure, and the slider and the linear rail cooperate with each other; The U-shaped guide rail assembly includes a U-shaped guide rail and an adjustable roller assembly. The U-shaped guide rail is arranged in the valve body. The adjustable roller assembly includes a mounting seat, a first roller and a second roller. The mounting seat is fixedly mounted on the side of the valve core structure. The first roller and the second roller are mounted on the mounting seat, and the distance between the first roller and the second roller can be adjusted. After the mounting seat is mounted on the side of the valve core structure, the first roller and the second roller can contact the guide surface of the U-shaped guide rail to achieve a front and rear limit accuracy of less than 0.2mm; there are two sliders, and the two sliders are respectively located on the side of the valve core structure; The sealing structure is a gate plate that is movable in the valve body.

2. A method for using a high-precision positioning shut-off valve capable of high-speed opening and closing, characterized in that: The shut-off valve is installed in a pipeline system where the circulating medium contains corrosive gas or dust, wherein the shut-off valve is a high-precision positioning shut-off valve capable of high-speed opening and closing as described in claim 1; When the shut-off valve needs to be opened, the servo electric cylinder is started, and the servo electric cylinder drives the valve core structure to move upward, so that the guide ring in the valve core structure is flush with the valve channel interface, so that the valve can be opened; When the shut-off valve needs to be closed, the servo electric cylinder is started, and the servo electric cylinder drives the valve core structure to move downward, so that the sealing structure in the valve core structure cuts off the valve channel interface to close the valve.

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