Shifting fork type butterfly valve

Abstract

The utility model discloses a shifting fork type butterfly valve which comprises a butterfly valve body, a valve rod and an actuator, the valve rod is installed in the middle of the butterfly valve body and extends out of a valve seat of the butterfly valve body to be connected with the driving end of the actuator, the shifting fork type butterfly valve further comprises an external driving mechanism, and the external driving mechanism comprises a driven gear, a supporting plate, a core column, a driving gear, a vertical pipe, an external driving rod and a matching plate. A driven gear is welded to the position, between the actuator and the butterfly valve body, of a valve rod, a driving gear is connected to the outside of the driven gear in a meshed mode, an external driving mechanism is arranged at the position of the valve rod of the butterfly valve body, and the external driving mechanism conducts external force driving on the valve rod of the shifting fork type butterfly valve through a gear structure capable of being driven by external force. The valve rod is opened by external force through air source power at the manual auxiliary actuator after aging, and external force auxiliary opening and closing of the shifting fork type butterfly valve after aging of the valve rod are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a fork-type butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve in which the closing member (valve disc or butterfly plate) is a disc, which rotates around the valve shaft to achieve opening and closing. The butterfly valve opening and closing member is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulation. Most of the current butterfly valves are opened and closed by a fork structure or a gear structure. Compressed air enters the cylinder to push the fork piston to move. The linear motion of the piston is converted into the rotational motion of the output shaft through the turntable, thereby realizing the opening and closing control of the butterfly valve.

[0003] The prior art slewing fork butterfly valve adopts a slewing fork structure to drive the valve stem to rotate and open and close the butterfly plate. When the driving air source of the slewing fork butterfly valve fails and the power is insufficient, the butterfly valve cannot be manually driven for auxiliary opening. When the valve stem of the slewing fork butterfly valve is aged and stuck, the driving force required for the valve stem to rotate the valve plate will increase. The original air source power will be insufficient to drive the slewing fork butterfly valve, and it is inconvenient for workers to rotate the valve stem for emergency opening or closing of the slewing fork butterfly valve. For this reason, we propose a slewing fork butterfly valve. Utility Model Content

[0004] The main purpose of the utility model is to provide a slewing fork type butterfly valve, in which an external drive mechanism is arranged at the valve stem of the butterfly valve body, and the external drive mechanism drives the valve stem of the slewing fork type butterfly valve externally through a gear structure that can be driven by an external force, so that the valve stem is opened externally by the air source power at the human-assisted actuator after aging, which facilitates the slewing fork type butterfly valve to be opened and closed with external force assistance after the valve stem is aged, and can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A fork-type butterfly valve comprises a butterfly valve body, a valve stem and an actuator, wherein a valve stem is installed in the middle of the butterfly valve body, and the valve stem extends out of the valve seat of the butterfly valve body and is connected to the driving end of the actuator, and also comprises an external drive mechanism, wherein the external drive mechanism comprises a driven gear, a support plate, a core column, a driving gear, a vertical pipe, an external drive rod and a matching plate, a driven gear is welded at the valve stem between the actuator and the butterfly valve body, and the driven gear is externally meshed with the driving gear, a core column is embedded in the middle of the driving gear, and the bottom cylinder of the core column is welded to the butterfly valve body below the driving gear through the support plate, a vertical pipe is welded to the upper end surface of the driving gear away from the support plate, and a through opening for inserting the external drive rod is symmetrically opened at the tube wall of the vertical pipe, and a matching plate for inserting the external drive rod is symmetrically welded at the rod body of the external drive rod.

[0007] Furthermore, the plate body of the matching plate is a D-shaped plate body, and the matching plate is welded to the rod body of the outer drive rod with its own strip-shaped straight plate surface; the D-shaped plate body of the matching plate can be adapted to fit the rod body of the outer drive rod and clamped at the vertical pipe.

[0008] Furthermore, the column size of the core column is the same as the wheel hole size of the driving gear; the core column can be adapted to be inserted into the wheel hole of the driving gear.

[0009] Furthermore, the rod body of the outer drive rod extends outward from the top valve seat of the butterfly valve body; the longer outer drive rod can extend out of the top valve seat of the butterfly valve body and be held by a person's hand.

[0010] Furthermore, a valve stem passes through the wheel hole of the driven gear, and an upper connecting block is welded between the valve stem and the upper end surface of the driven gear; the valve stem and the driven gear are inserted and then welded together with the upper connecting block.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model provides an external drive mechanism at the valve stem of the butterfly valve body. The external drive mechanism drives the valve stem of the slewing fork butterfly valve externally through a gear structure that can be driven by external force, so that the valve stem is opened externally by the air source power at the human-assisted actuator after aging, which facilitates the external force-assisted opening and closing of the slewing fork butterfly valve after the valve stem is aged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram of the overall structure of a swivel fork type butterfly valve.

[0014] Figure 2 The utility model is an exploded view of the external drive mechanism of a slewing fork type butterfly valve.

[0015] In the figure: 1. Butterfly valve body; 2. Valve stem; 3. Actuator; 4. External drive mechanism; 5. Driven gear; 6. Support plate; 7. Core column; 8. Driving gear; 9. Vertical pipe; 10. Through-hole; 11. External drive rod; 12. Matching plate; 13. Upper connecting block. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0017] like Figure 1-2 As shown, a fork-type butterfly valve comprises a butterfly valve body 1, a valve stem 2 and an actuator 3, wherein a valve stem 2 is installed in the middle of the butterfly valve body 1, and the valve stem 2 extends out of the valve seat of the butterfly valve body 1 and is connected to the driving end of the actuator 3, and also comprises an external drive mechanism 4, wherein the external drive mechanism 4 comprises a driven gear 5, a support plate 6, a core column 7, a driving gear 8, a vertical pipe 9, an external drive rod 11 and a matching plate 12, wherein a driven gear 5 is welded at the valve stem 2 between the actuator 3 and the butterfly valve body 1, and the driven gear 5 is externally meshed and connected with the driving gear 8, a core column 7 is embedded in the middle of the driving gear 8, and the bottom cylinder of the core column 7 is welded to the butterfly valve body 1 below the driving gear 8 through the support plate 6, a vertical pipe 9 is welded on the upper end surface of the driving gear 8 away from the support plate 6, and a through hole 10 for inserting the external drive rod 11 is symmetrically opened at the tube wall of the vertical pipe 9, and a matching plate 12 for inserting the external drive rod 11 is symmetrically welded at the rod body of the external drive rod 11.

[0018] The plate body of the matching plate 12 is a D-shaped plate body, and the matching plate 12 is welded to the rod body of the outer drive rod 11 with its own strip-shaped straight plate surface; the D-shaped plate body of the matching plate 12 can be adapted to fit the rod body of the outer drive rod 11 and clamped on the vertical pipe 9.

[0019] The column size of the core column 7 is the same as the wheel hole size of the driving gear 8 ; the core column 7 can be adapted to be inserted into the wheel hole of the driving gear 8 .

[0020] The rod body of the outer drive rod 11 extends outward from the top valve seat of the butterfly valve body 1; the longer outer drive rod 11 can extend out of the top valve seat of the butterfly valve body 1 and be held by a person.

[0021] The valve stem 2 passes through the wheel hole of the driven gear 5 , and an upper connecting block 13 is welded between the valve stem 2 and the upper end surface of the driven gear 5 ; the valve stem 2 and the driven gear 5 are inserted and then welded together with the upper connecting block 13 .

[0022] It should be noted that the utility model is a fork-type butterfly valve, in which an external drive mechanism 4 is arranged at the valve stem 2 of the butterfly valve body 1, and the driven gear 5 of the external drive mechanism 4 is inserted through the valve stem 2 and welded with the upper connecting block 13, and then the support plate 6 of the external drive mechanism 4 can be welded and fixed at the top of the butterfly valve body 1, and the core column 7 above the support plate 6 can be clamped with a driving gear 8, and the driving gear 8 is meshed and connected with the driven gear 5. When the fork-type structure in the actuator 3 drives the valve stem 2 to rotate, the driven gear 5 rotates with the driving gear 8, and then the valve stem 2 can drive the butterfly plate in the butterfly valve body 1 to rotate to start Closed. When the valve stem 2 ages and needs to be turned with great effort, the external drive rod 11 can be inserted into the through-hole 10 of the vertical tube 9 above the driving gear 8, and the external drive rod 11 is clamped with the vertical tube 9 with the help of the matching plate 12. After holding the external drive rod 11 and rotating it half a circle along the original rotation direction of the valve stem 2, the driving gear 8 can drive the driven gear 5 to drive the valve stem 2 to rotate, and the air source drive at the actuator 3 can also be started at the same time, effectively realizing the auxiliary external force drive of the valve stem 2 at the fork-type butterfly valve. When the valve stem 2 can rotate normally, the external drive rod 11 can be pulled out from the vertical tube 9 to prevent the external drive rod 11 from affecting the normal rotation of the valve stem 2.

[0023] It should be noted that the utility model is a swivel fork type butterfly valve, and the components in the utility model are all components known to those skilled in the art, and the structure and principle thereof are all known to those skilled in the art through technical manuals or conventional experimental methods.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A scotch fork type butterfly valve, comprising a butterfly valve body (1), a valve stem (2) and an actuator (3), wherein the valve stem (2) is installed in the middle of the butterfly valve body (1), and the valve stem (2) extends out of the valve seat of the butterfly valve body (1) and is connected to the driving end of the actuator (3), characterized in that: The invention also comprises an external drive mechanism (4), wherein the external drive mechanism (4) comprises a driven gear (5), a support plate (6), a core column (7), a driving gear (8), a vertical tube (9), an external drive rod (11) and a matching plate (12); a driven gear (5) is welded to the valve stem (2) between the actuator (3) and the butterfly valve body (1), and the driven gear (5) is externally meshed with the driving gear (8); a core column (7) is embedded in the middle of the driving gear (8), and the bottom column of the core column (7) is welded to the butterfly valve body (1) below the driving gear (8) through the support plate (6); a vertical tube (9) is welded to the upper end surface of the driving gear (8) away from the support plate (6), and a through hole (10) for inserting the external drive rod (11) is symmetrically opened at the tube wall of the vertical tube (9); and a matching plate (12) for inserting the external drive rod (11) is symmetrically welded to the rod body of the external drive rod (11).

2. A swivel fork butterfly valve according to claim 1, characterized in that: The plate body of the matching plate (12) is a D-shaped plate body, and the matching plate (12) is welded to the rod body of the outer drive rod (11) with its own strip-shaped straight plate surface.

3. A swivel fork butterfly valve according to claim 1, characterized in that: The column size of the core column (7) is the same as the wheel hole size of the driving gear (8).

4. A scotch fork type butterfly valve according to claim 1, characterized in that: The rod body of the external driving rod (11) extends outward from the top valve seat of the butterfly valve body (1).

5. The scotch fork type butterfly valve according to claim 1, characterized in that: A valve stem (2) passes through the wheel hole of the driven gear (5), and an upper connecting block (13) is welded between the valve stem (2) and the upper end surface of the driven gear (5).

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