A closed electric gate valve

Abstract

The present invention discloses a closed electric gate valve, comprising a valve body, wherein a body tube 1 and a body tube 2 whose axes coincide with each other are arranged in the valve body, a guide rail is arranged between the body tube 1 and the body tube 2, and the guide rail is perpendicular to the axis of the body tube 1. A valve running device, a blind plate and a through plate are arranged on the valve body; the valve running device drives the blind plate and the through plate to move on the guide rail. A clamping transmission device, a support arm and a support shaft are arranged on the valve body; the support shaft is rotatably connected to the middle part of the support arm, and the other end of the support arm is limited in a limit groove of the side wall of the body tube 2, the clamping transmission device drives one end of the support arm to rotate around the support shaft, and the other end of the support arm drives the body tube 2 to reciprocate along the axis; when clamping is required, based on the advantage of horizontal installation, the principle of lever is used to loosen the clamping, and the principle of lead screw nut transmission is used to switch the through plate and the blind plate, so that the installation space of the valve is much smaller than that of an ordinary gate valve, thereby overcoming the defects of the closed electric gate valve such as large friction resistance and large noise.

Description

Technical Field

[0001] The invention relates to the technical field of gate valves, and in particular to a closed electric gate valve. Background Art

[0002] The existing closed electric gate valve is composed of a left valve body, a middle valve body, a right valve body, a blind plate, a through plate, a valve plate travel mechanism, a valve release and clamping mechanism, an electric actuator, etc. The travel mechanism is a sprocket chain structure; the release and clamping mechanism is a gear ring or a pull rod structure. Its specific working principle is as follows: when releasing and clamping, the electric actuator drives the main transmission rod to rotate, the main transmission rod drives the gear ring, the gear ring drives the auxiliary transmission rod to rotate, and at the same time rotates forward (or reverse) to release (or clamp) the left and right valve bodies; another electric actuator drives the blind plate to slide, and the sprocket chain mechanism is used to achieve the switching action of the blind hole and the through hole on the valve plate.

[0003] The existing closed electric gate valve has a large clearance between the gear rings when installed horizontally, which is prone to interference, large friction resistance and noise during operation; the pull rod type is prone to interference and dead angles. The valve can only be installed vertically on a horizontal pipeline. Summary of the invention

[0004] The purpose of the present invention is to provide a closed electric gate valve. It solves the problems of the existing fully closed electric gate valves, such as large size, single installation method, and large space occupied at the installation site, and provides a horizontal installation method on a vertical pipeline, which is safer and more reliable, and significantly improves valve performance, sealing effect and service life.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a closed electric gate valve, comprising a valve body, wherein a body tube 1 and a body tube 2 with overlapping axes are arranged in the valve body, a guide rail is arranged between the body tube 1 and the body tube 2, and the guide rail is perpendicular to the axis of the body tube 1.

[0006] A valve running device, a blind plate and a through plate are arranged on the valve body; the valve running device drives the blind plate and the through plate to move on the guide rail.

[0007] A clamping transmission device, a support arm and a support shaft are arranged on the valve body; the support shaft is rotatably connected to the middle part of the support arm, and the other end of the support arm is limited in the limiting groove of the side wall of the body tube II. The clamping transmission device drives one end of the support arm to rotate around the support shaft, and the other end of the support arm drives the body tube II to reciprocate along the axis; when clamping is required, the blind plate or the through plate moves between the body tube I and the body tube II, and the body tube II moves along the axis so that the body tube I, the blind plate or the through plate and the body tube II are clamped and sealed.

[0008] In order to ensure smooth switching between the blind plate and the through plate, one side of the blind plate is connected to one side of the through plate through a connecting plate, and the driving end of the valve running device is connected to the blind plate or the through plate.

[0009] In order to save space and simplify the structure, the support shaft is parallel or perpendicular to the guide rail.

[0010] In order to avoid the gap when the blind plate and the through plate are switched and to avoid scratches on the sealing ring on the blind plate or the through plate, an angle steel is set on one side of the blind plate or the through plate to scrape away impurities on the guide rail.

[0011] In order to ensure more effective switching between the through plate and the blind plate, the valve travel device and / or the clamping transmission device is a screw nut transmission device.

[0012] In order to ensure smooth switching between the blind plate and the through plate, rollers are arranged on the blind plate and / or the through plate, and the blind plate and / or the through plate are slidably arranged on the guide rail through the rollers.

[0013] In order to assist in loosening the through plate or blind plate, a spring pressure plate mechanism is arranged on the valve body, and the roller is located between the guide rail and the spring pressure plate mechanism. When clamping is required, the second body tube pushes the blind plate or through plate close to the first body tube, and the roller is separated from the guide rail and pressed against the spring pressure plate mechanism, so that the spring pressure plate mechanism is compressed.

[0014] In order to simplify the structure, the spring pressure plate mechanism includes a fixed plate, a connecting rod, a connecting spring and a movable pressure plate; the fixed plate is fixed on the valve body, one end of the connecting rod is fixedly connected to one end of the connecting spring; the other end of the connecting rod is fixedly connected to the fixed plate, and the other end of the connecting spring is fixedly connected to the movable pressure plate. The connecting rod and the connecting spring are located between the fixed plate and the movable pressure plate. When clamping is required, the roller is pressed against the movable pressure plate and the connecting spring is compressed.

[0015] In order to facilitate maintenance and observation of the interior of the valve body, a manhole and a manhole cover are provided on the valve body at the blind plate or through plate.

[0016] In order to reduce the wear between the support arm and the second body tube and make the linkage smoother, a support roller is rotatably arranged at the other end of the support arm, and the support roller is limited in the limiting groove of the second body tube.

[0017] The technical effects of the present invention are as follows:

[0018] 1. The new closed electric gate valve takes the advantage of horizontal installation. The loosening and clamping are based on the lever principle. The switching between the through plate and the blind plate is based on the screw nut transmission principle. The installation space of the valve is much smaller than that of the ordinary gate valve, overcoming the defects of the closed electric gate valve such as large friction resistance and high noise.

[0019] 2. The valve adopts the soft sealing method of the sealing ring on the through plate and the blind plate to make the valve achieve "zero leakage".

[0020] 3. Automatically remove dirt on the guide rail during operation to ensure the normal use of the sealing ring.

[0021] 4. The valve is equipped with a spring pressure plate mechanism to ensure the performance of the valve opening.

[0022] 5. It solves the problems of the existing fully enclosed electric gate valve, such as large size, single installation method, and large space occupied at the installation site, and provides a horizontal installation method on a vertical pipeline, which is safer and more reliable, and significantly improves the valve performance, sealing effect and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an installation outline diagram of the closed electric gate valve in the embodiment;

[0024] Figure 2 Schematic diagram of the internal structure of the closed electric gate valve in the embodiment;

[0025] Figure 3 It is a schematic cross-sectional view of the left side of the closed electric gate valve in the embodiment;

[0026] Figure 4 for Figure 3 AA enlarged schematic diagram;

[0027] Figure 5 It is a schematic diagram of the front view of the closed electric gate valve in the embodiment;

[0028] Figure 6 This is the main dimension drawing of the closed electric gate valve;

[0029] Figure 7 This is the side view dimension drawing of the closed electric gate valve;

[0030] Figure 8 This is a top view dimensional drawing of a closed electric gate valve.

[0031] Figure numerals: 1. Support foot; 2. Valve body; 3. Side cover 1; 4. Manhole cover; 5. Side cover 2; 6. Transmission support; 7. Pull plate shaft; 8. Valve walking device; 9. Clamping transmission device; 10. Clamping support; 11. Clamping shaft; 12. Small box cover; 13. Pull plate limit block; 14. Support arm; 15. Clamping limit block; 16. Square sleeve; 17. Spring pressure plate mechanism; 18. Roller; 19. Roller shaft; 20. Connecting plate; 21. Support shaft; 22. Pin shaft; 23. Support wheel; 24. Bushing; 25. Through plate; 26. Blind plate; 27. Pull plate sleeve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example

[0034] like Figure 1-8 As shown, a closed electric gate valve is composed of a support foot 1, a small box cover 12, a valve body 2, two side covers, a blind plate 26, a through plate 25, a roller 18, a roller shaft 19, a connecting plate 20, a spacer ring, a support arm 14, a support wheel 23, a support shaft 21, a pin 22, a bushing 24, a clamping shaft 11, a clamping nut, a square sleeve 16, a clamping support 10, a manhole cover 4, a pull plate shaft 7, a pull plate sleeve 27, a transmission support 6, a spring pressure plate, a protective device, a limit block, a bellows and a transmission device. The transmission device includes a valve running device 8 and a clamping transmission device 9. The two side covers are side cover 1 3 and side cover 2 5. The body tube 1 can be an upper body tube, and the body tube 2 can be a lower body tube.

[0035] An upper body tube and a lower body tube with overlapping axes are arranged in the valve body 2. The upper body tube is fixedly arranged on the valve body 2, and the lower body tube is vertically slidably arranged in the valve body 2. Rollers 18 are respectively installed on the blind plate 26 and the through plate 25. The rollers 18 are rollingly arranged on the guide rails of the valve body 2. The blind plate 26 and the through plate 25 are supported by the guide rails on the valve body 2 to realize the switching of the blind plate 26 and the through plate 25. The blind plate 26 and the through plate 25 are connected by the connecting plate 20 to realize that the two plates do not interfere with each other when clamping and loosening. Guide rails are arranged on both sides of the valve body 2, and roller shafts 19 are arranged on both sides of the through plate 25 and the blind plate 26. The rollers 18 are installed on the roller shafts 19, and the rollers 18 move on the guide rails; and the roller shafts 19 without the connecting plate 20 are installed with spacer rings. Ensure the smoothness of the switching between the blind plate 26 and the through plate 25. In the free state, the rollers 18 are in contact with the guide rails, and when clamped, the valve plate and the rollers 18 are separated from the guide rails.

[0036] The valve travel device 8 can adopt a screw nut transmission device, and the screw nut device transmission adopts the screw nut principle, which can ensure that the blind plate 26 and the through plate 25 are switched more effectively, and the valve plate assembly can be operated stably and efficiently on the valve body 2. Specifically, it includes turning the hand wheel and the pull plate shaft 7, the pull plate shaft 7 is equivalent to the screw, and the pull plate shaft 7 is connected to the blind plate 26 through the pull plate sleeve 27. There is a gap between the pull plate sleeve 27 and the blind plate 26 to ensure the stability of the valve stem during the action.

[0037] The valve clamping mechanism is composed of a clamping transmission device 9, a support arm 14, a support wheel 23, a support shaft 21, a pin shaft 22, a bushing 24, a clamping shaft 11, a clamping nut, a square sleeve 16, a clamping support 10, etc. The valve plate component is composed of a blind plate 26, a through plate 25, a roller 18, a roller shaft, a connecting plate 20, a spacer ring, etc.

[0038] A spring pressure plate mechanism 17 is installed on the valve body 2 , and the mechanism is used to provide spring force to the clamped blind plate 26 or through plate 25 , thereby assisting the loosening of the through plate 25 or the blind plate 26 .

[0039] One end of the blind plate 26 and the through plate 25 contains angle steel, which is used to scrape impurities on the guide rail to ensure the gap when the blind plate 26 and the through plate 25 are switched to avoid scratching the sealing ring.

[0040] The valve can achieve bidirectional sealing, and the bellows has a dust-proof design. During installation, the bellows is always at the bottom regardless of how the medium flows.

[0041] The manhole cover 4, the vent, the purge port, and the sewage outlet are installed on the side cover of the valve body 2. The purge port is used to purge the impurities in the sealing surface and the body cavity with steam or inert gas; the bottom of the valve body 2 is provided with a sewage outlet, through which the water and dirt between the valve body cavity can be discharged; the vent is used to discharge the air in the body cavity during purging; the valve body 2 is provided with an observation hole or an inspection hole or a manhole for observing the walking status of the two plates and for inspection.

[0042] A pressure gauge is provided on the valve body 2 to detect the pressure in the valve cavity when the valve is closed; the valve is provided with a clamping limit block 15 and a pull plate limit block 13 to ensure that the clamping and releasing positions are accurate during the switching process of the through plate 25 and the blind plate 26; the valve transmission support 6 and the clamping support 10 are provided with an indicating mechanism to timely understand the operating status of the valve.

[0043] The clamping and releasing of the valve adopts the lever principle. When clamping, the clamping transmission device 9 drives the clamping shaft 11 to rotate clockwise, and the clamping shaft 11 is connected to the support arm 14 through the square sleeve 16. The clamping shaft 11 drives the square sleeve 16, with the support shaft 21 as the fulcrum, and uses the lever principle to make the support wheel 23 support the two support surfaces of the lower body tube, so that the roller 18 is separated from the guide rail, and the lower body tube first contacts the sealing ring of the valve plate, and then contacts the upper body tube, so as to achieve clamping; when releasing, the clamping shaft 11 rotates counterclockwise, and the support wheel 23 presses down the support surface of the lower body tube, so that the lower body tube is separated from the sealing ring first, and then the blind plate 26 or the through plate 25 is separated from the upper body tube, until the roller 18 contacts the guide rail. The spring pressure plate mechanism 17 can assist in ensuring the separation of the blind plate 26 or the valve plate; using the lever principle, a very small input torque can be converted into a larger torque. There are limit blocks at the ends of the through plate 25 and the blind plate 26 to prevent over-travel; there is also a limit block at the lower part of the clamping shaft 11 to prevent over-clamping.

[0044] Compared with the conventional fully enclosed gas gate valve, the novel enclosed electric gate valve of the present invention has the following main features:

[0045] 1. Novel structure and novel appearance

[0046] Compared with the closed electric gate valve, the valve has the remarkable feature of small size and can meet the needs of horizontal installation. The valve body 2 and the side cover are equipped with a manhole cover 4, a vent, a purge port, and a sewage outlet. The purge port is used to purge impurities from the sealing surface and the body cavity with steam or inert gas; the bottom of the valve body 2 is provided with a sewage outlet, through which water and dirt between the valve body cavity can be discharged; the vent is used to discharge the air in the body cavity during purging; the manhole cover 4 is used to observe the walking status and maintenance of the two plates. The status of the valve can be understood according to the indicator mechanism on the support. The valve installation space of this structure is greatly reduced, and the transmission is stable and reliable.

[0047] 2. Different transmission methods

[0048] The blind plate 26 and the through plate 25 switching part of the present invention adopts a screw nut transmission to ensure that the roller 18 moves effectively; the clamping and loosening part: using the lever principle, the clamping shaft 11 drives the square sleeve 16, with the support shaft 21 as the fulcrum, to convert a very small input torque into a large torque.

[0049] 3. The connection methods of blind plate 26 and through plate 25 are different

[0050] The through plate 25 and the blind plate 26 are connected by the connecting plate 20 to ensure that the blind plate 26 and the through plate 25 do not interfere with each other during clamping and loosening; roller shafts 19 are provided on both sides of the through plate 25 and the blind plate 26, and the roller 18 is installed on the roller shaft 19, and the roller 18 moves on the guide rail; and a spacer ring is installed on the roller shaft 19 without the connecting plate 20, so as to ensure smooth switching between the blind plate 26 and the through plate 25.

[0051] Compared with conventional closed electric gate valves, the novel closed electric gate valve of the present invention has the following beneficial effects:

[0052] (1) The volume and weight are significantly reduced, and the original three-box structure is changed to a one-box structure, which is more compact. In particular, the valve installation method of the present invention is horizontal installation, which does not limit the space requirements on the site of use;

[0053] (2) The valve has excellent sealing performance and automatically removes dirt on the guide rail during operation to ensure the normal use of the sealing ring;

[0054] (3) A drain hole is provided at the bottom of the valve body 2 to facilitate cleaning of dirt and impurities; the valve body 2 is also equipped with a vent hole, a steam purge hole and a nitrogen purge hole, which can effectively blow away the dirt on the sealing surface and the cavity, thereby extending the service life of the sealing surface;

[0055] (4) The valve is equipped with a spring pressure plate structure to ensure the performance of the valve opening;

[0056] (5) Clamping and loosening use the lever principle to make the valve action more effective;

[0057] (6) The valve plate is driven by the screw nut, which makes the valve plate more efficient;

[0058] (7) The valve is bidirectionally sealed, and the bellows has a dust-proof design. During installation, no matter how the medium flows, the bellows is always at the bottom. The valve of the present invention can fully meet the horizontal installation requirements of the plug valve on the vertical pipeline.

[0059] The closed electric gate valve of the present invention has a series of advantages over the conventional closed electric gate valve body 2, such as small volume, light weight, flexible installation method, fast opening and closing speed, safer and more reliable sealing, novel appearance and structure, etc.

[0060] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A closed electric gate valve, characterized in that: The valve body (2) comprises a body tube 1 and a body tube 2 whose axes coincide with each other, a guide rail is arranged between the body tube 1 and the body tube 2, and the guide rail is perpendicular to the axis of the body tube 1; a valve running device (8), a blind plate (26) and a through plate (25) are arranged on the valve body (2); the valve running device (8) drives the blind plate (26) and the through plate (25) to move on the guide rail; The valve body (2) is provided with a clamping transmission device (9), a support arm (14) and a support shaft (21); the support shaft (21) is rotatably connected to the middle part of the support arm (14), and the other end of the support arm (14) is limited in a limit groove on the side wall of the body tube. The clamping transmission device (9) drives one end of the support arm (14) to rotate around the support shaft (21), and the other end of the support arm (14) drives the body tube to move back and forth along the axis. When clamping is required, the blind plate (26) or the through plate (25) moves between the body tube one and the body tube two, and the body tube two moves along the axis so that the body tube one, the blind plate (26) or the through plate (25) and the body tube two are clamped and sealed. One side of the blind plate (26) is connected to one side of the through plate (25) via a connecting plate (20), and a driving end of the valve running device (8) is connected to the blind plate (26) or the through plate (25); The support shaft (21) is parallel or perpendicular to the guide rail.

2. A closed electric gate valve according to claim 1, characterized in that: One side of the blind plate (26) or the through plate (25) is provided with an angle steel for scraping impurities on the guide rail.

3. A closed electric gate valve according to claim 1, characterized in that: The valve running device (8) and / or the clamping transmission device (9) is a screw nut transmission device.

4. A closed electric gate valve according to claim 1, characterized in that: A roller (18) is arranged on the blind plate (26) and / or the through plate (25), and the blind plate (26) and / or the through plate (25) are slidably arranged on the guide rail via the roller (18).

5. A closed electric gate valve according to claim 1, characterized in that: A spring pressure plate mechanism (17) is arranged on the valve body (2), and a roller (18) is located between the guide rail and the spring pressure plate mechanism (17). When clamping is required, the second body tube pushes the blind plate (26) or the through plate (25) close to the first body tube, and the roller (18) is separated from the guide rail and pressed against the spring pressure plate mechanism (17), so that the spring pressure plate mechanism (17) is compressed.

6. A closed electric gate valve according to claim 5, characterized in that: The spring pressure plate mechanism (17) comprises a fixed plate, a connecting rod, a connecting spring and a movable pressure plate; the fixed plate is fixed on the valve body (2), one end of the connecting rod is fixedly connected to one end of the connecting spring; the other end of the connecting rod is fixedly connected to the fixed plate, the other end of the connecting spring is fixedly connected to the movable pressure plate, the connecting rod and the connecting spring are located between the fixed plate and the movable pressure plate, and when clamping is required, the roller (18) is pressed against the movable pressure plate and the connecting spring is compressed.

7. A closed electric gate valve according to claim 1, characterized in that: A manhole and a manhole cover (4) are provided on the valve body (2) at the blind plate (26) or the through plate (25).

8. A closed electric gate valve according to claim 1, characterized in that: The other end of the support arm (14) is rotatably provided with a support roller (18), and the support roller (18) is limited in a limiting groove of the second body tube.

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