CN113154057A

CN113154057A - Large-diameter plastic butterfly valve

Info

Publication number: CN113154057A
Application number: CN202110069063.2A
Authority: CN
Inventors: 董天盛
Original assignee: Heshan Liansu Industrial Development Co Ltd
Current assignee: Heshan Liansu Industrial Development Co Ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-07-23

Abstract

The invention belongs to the technical field of butterfly valves, and particularly relates to a large-diameter plastic butterfly valve which comprises a valve body and a valve block, wherein a through hole used for communicating pipes is formed in the valve body, a transition part used for placing a pouring gate is arranged on the through hole, the transition part is connected with the inner wall of the through hole, the valve block is movably arranged in the through hole and is in sealing fit with the inner wall of the through hole, the transition part is an inclined block arranged along the circumferential direction of the through hole, one side of the inclined block is smoothly connected with the inner wall of the through hole, and the inclined block inclines towards the direction far away from the axis of the through hole. This scheme is through setting up the sloping block as transition portion on the through-hole of valve body, and the sloping block can regard as the position that the runner set up when moulding plastics, and the incomplete material that the runner flowed down is cut off on the sloping block after the completion of moulding plastics like this, can not influence being connected of through-hole and valve block, just need not carry out car processing to the valve body through-hole internal surface after moulding plastics, has reduced production processes, has improved production efficiency.

Description

Large-diameter plastic butterfly valve

Technical Field

The invention belongs to the technical field of butterfly valves, and particularly relates to a large-caliber plastic butterfly valve.

Background

At present, a butterfly valve with a large diameter made of PVC water supply plastic is produced by injection molding, and in order to ensure the non-roundness of an inner hole of a main body of the butterfly valve in the injection molding process, a sprue of an injection molding runner is generally required to be arranged at an inner hole position in the middle of a valve body, so that the non-roundness of the inner hole surface caused by the impact of injection molding melt on a mold core is avoided, thus after the injection molding is finished, the residual material of the sprue can be left on the inner hole wall to cause the unevenness of the inner hole surface, and the non-roundness of the inner hole of the butterfly valve produced in the way is large, and after a sealing structure is installed, the extrusion of a valve block and the sealing structure is not smooth, so that the sealing property of the butterfly valve cannot be met; the butterfly valve disclosed in the chinese patent CN207195680U, its internal surface at the valve body is equipped with a plurality of recesses, the surface of bush be equipped with a plurality of lugs that the recess matches to release the pressure that dish board and bush extrusion in-process produced, it is through the form that sets up the recess although can solve the extrusion of valve block and seal structure smooth and easy, nevertheless because its valve body is traditional structure still, will set up the runner on the inner wall of through-hole in the middle of the valve body during the valve body of moulding plastics, just can guarantee the out-of-roundness of through-hole, need cut off the runner after the completion of moulding plastics, the through-hole inner wall can leave the burr defective material this moment, can destroy the leakproofness of butterfly valve, consequently, increase a car manufacturing procedure, it is level with the through-hole inner wall car, but can cause the valve body processing too complicated like this, and is with high costs, and low production efficiency.

Disclosure of Invention

The invention aims to overcome at least one defect in the prior art and provides a large-diameter plastic butterfly valve, which reduces the injection molding production process of the butterfly valve and improves the production efficiency and the sealing property of the butterfly valve.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a heavy-calibre plastics butterfly valve, includes valve body, valve block, is equipped with the through-hole that is used for communicateing tubular product on the valve body, is provided with the transition portion that is used for placing the runner on the through-hole, and transition portion and through-hole inner wall connection, valve block activity set up in the through-hole and with the sealed cooperation of through-hole inner wall.

This scheme is through being connected with transition portion on the through-hole, when production is moulded plastics like this, can set up the runner on transition portion, it obtains the valve body after to mould plastics the completion, the runner clout of cutting is located transition portion, and valve block and through-hole inner wall direct seal contact, clout on the transition portion can not influence the leakproofness of butterfly valve, and simultaneously, because transition portion is connected with the through-hole inner wall, the runner position is still in the centre of valve body like this, it is too big to avoid moulding plastics to accomplish the back through-hole internal surface shrinkage deformation, guarantee the out-of-roundness of through-hole, in addition, need not further process the through-hole internal surface after the completion of moulding plastics, can directly use, whole product structure is comparatively simple, reduce the processing step simultaneously, and improve.

Owing to there is an extreme condition, the remnant thickness that leaves after cutting off the runner is probably great, can influence the motion of valve block in the through-hole, consequently, transition portion can be for following the sloping block that through-hole circumference set up, sloping block one side and through-hole inner wall smooth connection, the sloping block is to keeping away from the direction slope of through-hole axis, make the thickness of valve body structure can the homogeneous change like this, the resistance that the melt flowed when can reducing moulding plastics, avoid moulding plastics and produce too big deformation, the out-of-roundness of valve body through-hole has been guaranteed, the remnant that leaves after the runner is cut off is on the sloping block simultaneously, avoid the motion that the excessive remnant of thickness hinders the valve body, thereby guarantee that the valve body leakproofness is not influenced.

As further improved structural style, still including the seal cover of card in locating the through-hole, the seal cover is located between through-hole inner wall and the valve block, and in addition, transition portion quantity is two, sets up respectively in the both ends of through-hole, is provided with two on the seal cover and keeps away from the fender ring of through-hole one side butt with two transition portions respectively, and the seal cover keeps off the ring joint on two transition portions through two. When the sealing sleeve is sleeved in the through hole, the two baffle rings are abutted against the two inclined blocks, so that the sealing sleeve can be clamped and positioned by the inclined blocks, and the sealing sleeve cannot deform and displace under the extrusion of the valve plate when the valve plate moves, thereby further ensuring the sealing property of the valve body; in addition, the sealing sleeve abutted against the inclined block can cover and cut off the residual material flowing down from the sprue, so that the whole product is more attractive.

As a further improved structure, the valve further comprises a rotating shaft which is fixedly connected with the valve plate and drives the valve plate to rotate in the through hole, and the rotating shaft is rotatably arranged on the valve body in a penetrating mode. The valve block is driven to rotate by the rotation of the rotating shaft, so that the flow area of the through hole is changed, and the flow of fluid passing through the butterfly valve is controlled.

As a further improved structure form, one end of the rotating shaft, which is far away from the valve plate, is fixedly provided with a handle fixedly connected with the rotating shaft. Through setting up the handle, when needing to rotate the valve block, the accessible exerts thrust to the handle for rotate with handle fixed connection pivot, drive the valve block and rotate, can rotate the valve block more laborsavingly like this.

Because when installing the butterfly valve connection on the heavy-calibre pipeline, if the butterfly valve is in half-open state, the valve block plane is certain angle with the pipeline cross-section, then during the fluid on the pipeline flows, can strike the valve block and make valve block and pipeline cross-section angle change, thereby change the original settlement flow of butterfly valve, consequently, as further improved structural style, the butterfly valve still includes the locking mechanism who restricts valve block turned angle, locking mechanism is including the fixed locking piece that sets up on the valve body, the activity sets up in the locking pole on hand, and the locking pole still is connected with the locking piece, drive the valve block through the pivot and rotate after certain angle like this, be connected fixed locking piece on locking pole on hand and the valve body, thereby will be fixed with the fixed pivot of handle, avoid the valve block to receive fluid impact and continue to rotate around the pivot.

As a further improved structure form, the handle comprises a fixed handle and a movable handle which is rotatably connected with the fixed handle, a plurality of locking grooves are formed in the locking piece, one end of the locking rod is rotatably connected with the movable handle, and the other end of the locking rod is inserted into the locking grooves. One end cover that the locking pole is close to the locking piece is equipped with the piece that resets that is used for driving the locking pole to reset. When the butterfly valve flow needs to be changed, the movable handle is forced to rotate around the fixed handle, the locking rod is driven to be separated from the locking groove, then the valve plate is rotated to a required angle by the aid of the force applied to the fixed handle, force on the movable handle is removed, the locking rod resets under the action of the reset piece and is clamped into the locking groove again, and locking and positioning of the valve plate are achieved.

Compared with the prior art, the beneficial effects are:

according to the scheme, the inclined block is arranged on the through hole of the valve body and serves as the transition part, and the inclined block can serve as the position where the gate is arranged during injection molding, so that the residual material flowing down from the gate is cut off on the inclined block after injection molding is finished, the connection between the through hole and the valve block cannot be influenced, the inner surface of the through hole of the valve body after injection molding is not required to be machined, the production procedures are reduced, and the production efficiency is improved; meanwhile, as the inclined block and the through hole are positioned in the middle of the valve body, the shrinkage deformation of the injection molded product is smaller, and the out-of-roundness of the through hole is also ensured.

Drawings

FIG. 1 is an exploded view of a large diameter plastic butterfly valve of the present invention;

FIG. 2 is a schematic view of the internal structure of the large-diameter plastic butterfly valve in a fully open state;

FIG. 3 is a schematic structural diagram of a valve body of a large-diameter plastic butterfly valve according to the invention;

FIG. 4 is a schematic view of a sealing sleeve structure of the large-diameter plastic butterfly valve of the invention;

FIG. 5 is an enlarged schematic view of section A of FIG. 2;

fig. 6 is an enlarged schematic view of a portion B of fig. 2.

Detailed Description

The drawings are for illustration purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Example 1:

fig. 1 to 6 show an embodiment of a large-diameter plastic butterfly valve, which includes a valve body 1 and a valve plate 2, wherein the valve body 1 is provided with a through hole 3 for communicating pipes, the through hole 3 is connected with a transition portion 4 for placing a gate 91, the transition portion 4 is connected with the inner wall of the through hole 3, and the valve plate 2 is movably arranged in the through hole 3 and is in sealing fit with the inner wall of the through hole 3.

As shown in fig. 3, two gates 91 of the runner 9 may be respectively placed at positions corresponding to the transition portions 4, and injection molding is performed.

Owing to there is an extreme condition, the remnant thickness that leaves after cutting off the runner is probably great, can influence the motion of valve block 2 in through-hole 3, consequently transition portion 4 is the sloping block that sets up along 3 circumference of through-hole in this embodiment, sloping block one side and 3 inner wall smooth connection of through-hole, the sloping block is to the direction slope of keeping away from 3 axes of through-hole, make the thickness of valve body 1 structure can the homogeneous change like this, the resistance that the melt flows when can reducing moulding plastics, avoid moulding plastics to produce too big deformation, the out-of-roundness of 1 through-hole 3 of valve body has been guaranteed, the remnant that leaves after the runner is cut off simultaneously is on the sloping block, avoid the motion that the remnant that the thickness is too big hinders valve body 1, thereby guarantee that the leakproofness of valve body 1 is not influenced. Certainly, the transition portion 4 is only a preferred embodiment along the circumferential direction of the through hole 3, and it is a purpose that a plurality of gate positions can be arbitrarily selected during injection molding, which cannot be understood as a limitation to the present solution, in a specific implementation process, only two independent transition portions 4 may be certainly provided, and gates are provided on the two independent transition portions 4 during injection molding, so that the functions of the present solution can also be realized.

As shown in fig. 4 and 5, in this embodiment, the sealing sleeve 5 is further included and clamped in the through hole 3, the sealing sleeve 5 is located between the inner wall of the through hole 3 and the valve plate 2, in addition, the number of the transition portions 4 is two, the two transition portions are respectively arranged at two ends of the through hole 3, the sealing sleeve 5 is provided with two retaining rings 51 which are respectively abutted to one side of the two transition portions 4 far away from the through hole 3, and the sealing sleeve 5 is clamped on the two transition portions 4 through the two retaining rings 51. When the sealing sleeve 5 is sleeved in the through hole 3, the two baffle rings 51 are abutted against the two inclined blocks and positioned on the two sides of the valve body 1, so that the sealing sleeve 5 can be clamped and positioned in the through hole 3 by the inclined blocks, and the sealing sleeve 5 cannot deform and displace under the extrusion of the valve block 2 when the valve block 2 moves, thereby further ensuring the sealing property of the valve body 1; in addition, the sealing sleeve 5 abutted against the inclined block can cover and cut off the residual material flowing down from the sprue, so that the whole product is more attractive.

The valve further comprises a rotating shaft 6, one end of the rotating shaft is fixedly connected with the valve plate 2 and drives the valve plate 2 to rotate in the through hole 3, and the rotating shaft 6 is rotatably arranged on the valve body 1 in a penetrating mode and extends out of the valve body 1. Through the rotation of pivot 6 like this, drive valve block 2 and rotate around pivot 6 to change the flow area of through-hole 3, realize the fluid flow size of control through the butterfly valve.

As shown in fig. 1 and fig. 2, a handle 7 fixedly connected to the rotating shaft 6 is fixedly disposed at one end of the rotating shaft 6 away from the valve plate 2. Through setting up handle 7, when needing to rotate valve block 2, the accessible exerts thrust to handle 7 for rotate with handle 7 fixed connection pivot 6, drive valve block 2 and rotate, can rotate valve block 2 more laborsavingly like this.

As shown in figures 2 and 6, when the butterfly valve is installed on a large-diameter pipeline in a connecting way, if the butterfly valve is in a half-open state, the plane of the valve plate 2 forms a certain angle with the section of the pipeline, when fluid on the pipeline flows, the fluid impacts the valve plate 2 to change the angle between the valve plate 2 and the section of the pipeline, thereby changing the original set flow rate of the butterfly valve, therefore, as a further improved structure form, the butterfly valve also comprises a locking mechanism 8 for limiting the rotation angle of the valve plate 2, the locking mechanism 8 comprises a locking piece 81 fixedly arranged on the valve body 1 and a locking rod 82 movably arranged on the handle 7, and the locking rod 82 is also connected with the locking piece 81, so that after the valve plate 2 is driven to rotate for a certain angle by the rotating shaft 6, the locking rod 82 of the handle 7 is connected with the locking piece 81 fixed on the valve body 1, thereby fixing the valve plate 2 with the fixed rotating shaft 6 of the handle 7 and preventing the valve plate 2 from being impacted by fluid and rotating around the rotating shaft 6 continuously.

As shown in fig. 6, the handle 7 in this embodiment includes a fixed handle 71, a movable handle 72 rotatably connected to the fixed handle 71, and the locking member 81 has a plurality of locking grooves 811, or the locking member 81 is provided coaxially with the rotating shaft 6 by using an existing gear, so that a plurality of locking grooves 811 are formed between teeth; one end of the lock lever 82 is rotatably connected to the movable handle 72, and the other end thereof is inserted into the lock groove 811. One pot head that the locking pole 82 is close to locking piece 81 is equipped with the piece 821 that resets that is used for driving locking pole 82 to reset, specifically, resets 821 and is the spring, is provided with the cavity 711 that holds the spring on the fixed handle 71, and the locking pole 82 is close to the one end of locking piece 81 and is provided with limiting plate 822, spring both ends respectively with limiting plate 822, cavity 711 inner wall fixed connection. When butterfly valve flow needs to be changed greatly like this, make it rotate round fixed handle 71 to movable handle 72 application of force, drive locking pole 82 and break away from locking groove 811, limiting plate 822 compression spring this moment, spring energy storage, then after making valve block 2 rotate to required angle to fixed handle 71 application of force, remove the power on the movable handle 72, spring release energy, locking pole 82 resets under the spring action and blocks in locking groove 811 again, realizes the locking location of valve block 2.

In the embodiment, the inclined block is arranged on the through hole 3 of the valve body 1 to serve as the transition part 4, and the inclined block can serve as the position where the gate is arranged during injection molding, so that the residual material flowing down from the gate is cut off on the inclined block after the injection molding is finished, the connection between the through hole 3 and the valve plate 2 is not influenced, the inner surface of the through hole 3 of the valve body 1 after the injection molding is not required to be machined, the production procedures are reduced, and the production efficiency is improved; meanwhile, as the inclined block and the through hole 3 are positioned in the middle of the valve body 1, the shrinkage deformation of the injection molded product is smaller, and the out-of-roundness of the through hole 3 is also ensured; in addition, the handle 7 is provided with a locking mechanism 8, so that the butterfly valve in a half-open state can be prevented from being continuously opened by fluid impact, and the flow of the butterfly valve can be stably controlled.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a heavy-calibre plastics butterfly valve, includes valve body (1), valve block (2), be equipped with through-hole (3) that are used for communicateing tubular product on valve body (1), its characterized in that, be provided with transition portion (4) that are used for placing the runner on through-hole (3), transition portion (4) with through-hole (3) inner wall connection, valve block (2) activity set up in through-hole (3) and with through-hole (3) inner wall sealing fit.

2. The large-caliber plastic butterfly valve according to claim 1, wherein the transition part (4) is an inclined block arranged along the circumference of the through hole (3), one side of the inclined block is smoothly connected with the inner wall of the through hole (3), and the inclined block is inclined towards the direction far away from the axis of the through hole (3).

3. The large-caliber plastic butterfly valve according to claim 1 or 2, further comprising a sealing sleeve (5) clamped in the through hole (3), wherein the sealing sleeve (5) is positioned between the inner wall of the through hole (3) and the valve plate (2).

4. The large-caliber plastic butterfly valve according to claim 3, wherein the number of the transition portions (4) is two, the two transition portions are respectively arranged at two ends of the through hole (3), the sealing sleeve (5) is provided with two retaining rings (51) which are respectively abutted against one sides of the two transition portions (4) far away from the through hole (3), and the sealing sleeve (5) is clamped on the two transition portions (4) through the two retaining rings (51).

5. The large-caliber plastic butterfly valve according to claim 4, further comprising a rotating shaft (6) fixedly connected with the valve plate (2) and driving the valve plate (2) to rotate in the through hole (3), wherein the rotating shaft (6) is rotatably arranged on the valve body (1) in a penetrating manner.

6. A large-caliber plastic butterfly valve according to claim 5, wherein a handle (7) fixedly connected with the rotating shaft (6) is fixedly arranged at one end of the rotating shaft (6) far away from the valve plate (2).

7. A large-caliber plastic butterfly valve according to claim 6, characterized by further comprising a locking mechanism (8) for limiting the rotation angle of the valve plate (2).

8. The large-caliber plastic butterfly valve according to claim 7, wherein the locking mechanism (8) comprises a locking member (81) fixedly arranged on the valve body (1) and a locking rod (82) movably arranged on the handle (7), and the locking rod (82) is connected with the locking member (81).

9. The large-caliber plastic butterfly valve according to claim 8, wherein the handle (7) comprises a fixed handle (71) and a movable handle (72) rotatably connected with the fixed handle (71), the locking member (81) is provided with a plurality of locking grooves (811), one end of the locking rod (82) is rotatably connected with the movable handle (72), and the other end of the locking rod is inserted into the locking grooves (811).

10. The large-caliber plastic butterfly valve according to claim 9, wherein a reset piece (821) for driving the lock rod (82) to reset is sleeved at one end of the lock rod (82) close to the lock piece (81).