Actuating mechanism of low-temperature butterfly valve

Abstract

The utility model relates to the field of valves, and discloses an actuating mechanism of a low-temperature butterfly valve, which comprises a valve body, a valve core is arranged in the valve body, the top of the valve core is fixedly connected with a valve rod, the valve rod extends up and down, the top end of the valve rod penetrates out of the top of the valve body, and a reduction gearbox is fixedly mounted at the top of the valve body. The bottom end of an output shaft of the reduction gearbox is fixedly connected with the top end of the valve rod, the outer wall of the right end of an input shaft of the reduction gearbox is fixedly connected with a worm gear in a sleeved mode, fixing plates are arranged on the front side and the rear side of the lower portion of the worm gear, and a worm is rotationally connected between the tops of the two fixing plates and meshed with the worm gear. A tooth groove is formed in the outer wall of the upper portion of the movable ring, the front end of the worm penetrates out of the front side wall of the front side fixing plate, the outer wall of the front end of the worm is fixedly sleeved with a gear, and the upper right side of the outer wall of the movable ring is fixedly connected with a grip. The valve can be opened or closed by holding the grip and rotating the movable ring, and the operation process is simple and visual.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve field, specifically for a low temperature butterfly valve's actuating mechanism. BACKGROUND

[0002] In the fluid control field, as one of main on-off valves, butterfly valve has small flow resistance, valve is not easy to block, controls large flow and the characteristics such as convenient control, and is widely used in energy, chemical industry, medical treatment and other fields.

[0003] The current butterfly valve usually adopts the mode of directly rotating valve handle to open and close, and is inconvenient to install in small space. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome above -mentioned insufficient, the utility model provides a low temperature butterfly valve's actuating mechanism.

[0005] The utility model takes the technical scheme:

[0006] A low temperature butterfly valve's actuating mechanism, including valve body, the valve body has valve core, the outer wall of valve core and the inner wall of valve body slidingly cooperate, the top of valve core is fixedly connected valve rod, and valve rod extends up and down, and the top end and bottom end of valve rod are rotationally connected with the inner wall of valve body, and the top end of valve rod penetrates the top of valve body, and the top of valve body is fixedly installed speed reducer, and the bottom end of output shaft of speed reducer is fixedly connected with the top end of valve rod, and the outer wall right end of input shaft of speed reducer is fixedly sleeved with worm wheel, and the front and back sides below worm wheel all have fixed plate, and the bottom end of fixed plate is fixedly connected with the top of valve body, and the top between two fixed plates is rotationally connected with worm, and worm is engaged with worm wheel, and the outer wall front side of valve body is fixedly sleeved with bearing, and the outer ring of bearing is fixedly sleeved with movable ring, and the upper outer wall of movable ring is provided with tooth slot, and the front end of worm penetrates the front wall of front fixed plate, and the front end outer wall of worm is fixedly sleeved with gear, and gear is engaged with tooth slot, and the outer wall right side of movable ring is fixedly connected with handle above.

[0007] The utility model has the advantages of:

[0008] The utility model can realize the opening or closing of valve by holding handle and rotating movable ring, and the operation process is simple and intuitive.

[0009] The engagement transmission of worm and worm wheel has self-locking property, can ensure that valve keeps stable opening or closing state under specific conditions, and the addition of speed reducer further improves the stability and efficiency of transmission. DRAWING EXPLANATION

[0010] Figure 1 It is the structure schematic diagram of the utility model;

[0011] Figure 2 It is Figure 1 The rear side view structure schematic diagram;

[0012] Figure 3 is Figure 2 is an enlarged view of A in figure 1;

[0013] Figure 4 is a schematic diagram of the disengagement state of the movable ring and the bearing of the utility model;

[0014] Figure 5 is a schematic diagram of the partial structure of the utility model.

[0015] In all the drawings, the specific reference signs are as follows: 1, valve body; 2, valve core; 3, valve rod; 4, reduction box; 5, worm wheel; 6, fixed plate; 7, worm; 8, bearing; 9, movable ring; 10, tooth groove; 11, handle; 12, gear. DETAILED DESCRIPTION

[0016] As Figures 1-5 shown: a low temperature butterfly valve actuator, including valve body 1, valve body 1 has valve core 2, the outer wall of valve core 2 and the inner wall of valve body 1 sliding fit, the top of valve core 2 is fixedly connected with valve rod 3, valve rod 3 extends up and down, the top end and the bottom end of valve rod 3 are rotatably connected with the inner wall of valve body 1, the top end of valve rod 3 penetrates out of the top of valve body 1, the top of valve body 1 is fixedly installed with reduction box 4, the bottom end of the output shaft of reduction box 4 is fixedly connected with the top end of valve rod 3, the outer wall of the right end of the input shaft of reduction box 4 is fixedly sleeved with worm wheel 5, the front and rear sides below worm wheel 5 are both provided with fixed plate 6, the bottom end of fixed plate 6 is fixedly connected with the top of valve body 1, worm 7 is rotatably connected between the top of the two fixed plates 6, worm 7 is engaged with worm wheel 5, the outer wall of the front side of valve body 1 is fixedly sleeved with bearing 8, the outer ring of bearing 8 is fixedly sleeved with movable ring 9, the upper outer wall of movable ring 9 is provided with tooth groove 10, the front end of worm 7 penetrates out of the front wall of the front fixed plate 6, the front end outer wall of worm 7 is fixedly sleeved with gear 12, gear 12 is engaged with tooth groove 10, the outer wall right side of movable ring 9 is fixedly connected with handle 11.

[0017] The low temperature butterfly valve is in a certain state of closing or opening, the valve core 2 is located in the valve body 1, and is connected with the output shaft of the reduction box 4 through the valve rod 3, the worm 7 is engaged with the worm wheel 5, but is in a static state.

[0018] The movable ring 9 is fixedly sleeved with the outer wall of the valve body 1 through the bearing 8, the tooth groove 10 and the gear 12 do not move relative to each other.

[0019] The operator holds the handle 11 and applies a rotating force, the handle 11 drives the movable ring 9 to rotate along the outer wall of the valve body 1.

[0020] With the rotation of the movable ring 9, the tooth groove 10 and the gear 12 begin to engage, the gear 12 is driven by the driving force of the tooth groove 10 and begins to rotate.

[0021] The rotation of the gear 12 drives the worm 7 to rotate, because the front end outer wall of the worm 7 is fixedly sleeved on the gear 12, the rotation of the worm 7 further drives the worm wheel 5 to rotate, because the worm 7 is engaged with the worm wheel 5.

[0022] The rotation of the worm wheel 5 is transmitted to the output shaft of the reduction box 4 through the input shaft of the reduction box 4, the output shaft of the reduction box 4 is fixedly connected with the top end of the valve rod 3, so that the valve rod 3 starts to rotate, the rotation of the valve rod 3 drives the valve core 2 to rotate in the valve body 1, so as to realize the opening or closing of the valve.

Claims

1. An actuator for a cryogenic butterfly valve, characterized in that, The utility model relates to a valve, including valve body (1), valve body (1) have valve core (2) in, the outer wall of valve core (2) and the inner wall of valve body (1) sliding fit, the top of valve core (2) is fixedly connected valve stem (3), valve stem (3) extends up and down, the top end and bottom end of valve stem (3) are rotatably connected with the inner wall of valve body (1), the top end of valve stem (3) penetrates out the top of valve body (1), the top of valve body (1) is fixedly installed reduction gearbox (4), the bottom end of output shaft of reduction gearbox (4) is fixedly connected with the top end of valve stem (3), the right end of input shaft of reduction gearbox (4) outer wall fixedly sheathed worm wheel (5), worm wheel (5) both have fixed plate (6) below front and back, the bottom end of fixed plate (6) is fixedly connected with the top of valve body (1), the top between two fixed plate (6) rotatably connects worm gear (7), worm gear (7) is engaged with worm wheel (5), the outer wall front side of valve body (1) fixedly sheathed bearing (8), the outer ring of bearing (8) fixedly sheathed movable ring (9), the upper outer wall of movable ring (9) is set up gear slot (10), the front end of worm gear (7) penetrates out the front wall of front fixed plate (6), the front end outer wall of worm gear (7) fixedly sheathed gear (12), gear (12) is engaged with gear slot (10), the outer wall right side of movable ring (9) is fixedly connected handle (11) in upper partial area.

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