CN111853265A

CN111853265A - Gate valve

Info

Publication number: CN111853265A
Application number: CN202010830772.3A
Authority: CN
Inventors: 李赐章; 林启桃; 陈伟彬; 饶益龙; 林志强; 章俊华
Original assignee: Fujian Longjing High Precision Equipment Manufacturing Co ltd; LONJING ENVIRONMENT TECHNOLOGY CO LTD
Current assignee: Fujian Longjing High Precision Equipment Manufacturing Co ltd; LONJING ENVIRONMENT TECHNOLOGY CO LTD
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2020-10-30

Abstract

The invention relates to a gate valve, which comprises a valve body, a gate valve and a gate valve, wherein the gate valve is provided with a valve cavity, and a feed inlet and a discharge outlet which are communicated with the valve cavity; the inserting plate is positioned in the valve cavity and can block the feeding hole; the driving assembly comprises a driving piece, a driving shaft and a transmission mechanism, the driving shaft can rotate to drive the inserting plate to move to open and close the feeding hole through the transmission mechanism, the driving end of the driving shaft penetrates through the side wall of the valve cavity and is connected with the driving piece, and a sealing device is arranged between the driving shaft and the side wall of the valve cavity. The gate valve can improve the sealing performance of the gate valve and avoid polluting the field environment.

Description

Gate valve

Technical Field

The invention relates to the technical field of valves, in particular to a gate valve.

Background

At present, the gate valve that is used for material to carry to turn off on the market mostly pushes and pulls the picture peg through the driving piece in order to realize the switching, and it is sealed mainly to set up the packing in the periphery of picture peg to seal the gate valve, and the picture peg rubs many times between back and the packing after pegging graft many times and causes easily sealed unreliable to, owing to receive field installation, cause the foreign matter that difficult clearance such as picture peg surface bonding welding slag easily, thereby cause the secondary damage of packing seal, make the sealing performance of packing worsen, lead to the dust in the valve chamber to spill and influence site environment.

How to improve the sealing performance of the gate valve and avoid the pollution to the field environment is a technical problem to be solved by technical personnel in the field.

Disclosure of Invention

The invention aims to provide a gate valve, which can improve the sealing performance of the gate valve and avoid the pollution to the field environment.

In order to solve the technical problem, the invention provides a gate valve which comprises a valve body, a valve cavity, a feeding hole and a discharging hole, wherein the feeding hole and the discharging hole are communicated with the valve cavity; the inserting plate is positioned in the valve cavity and can block the feeding hole; drive assembly, including driving piece, drive shaft and drive mechanism, the rotation of drive shaft can pass through drive mechanism drives the picture peg removes with the switching the feed inlet, the drive end of drive shaft passes the lateral wall of valve pocket and with the driving piece is connected, the drive shaft with be equipped with sealing device between the lateral wall of valve pocket.

The flashboard is tightly attached to the feed port and can block the feed port, and when the driving assembly drives the flashboard to move in the valve cavity to open and close the feed port, the flashboard still is a closed cavity body because the flashboard moves in the valve cavity, and only two openings, namely the feed port and the discharge port, are arranged, so that dust in the valve cavity cannot leak to the external environment, namely, a sealing device is not required to be arranged between the flashboard and the feed port in the embodiment.

The drive shaft passes through the lateral wall of valve chamber to be equipped with sealing device between the lateral wall of drive shaft and valve chamber, in order to avoid the dust in the valve chamber to leak along the gap between drive shaft and the lateral wall, because area of contact between drive shaft and the lateral wall compares in the area of contact between picture peg and the feed inlet, the area is obviously less, that is to say, in the push-pull valve that this embodiment provided, when realizing the same leakproofness purpose, the area that needs to seal is less, reduces the degree of difficulty of sealing process.

Optionally, the transmission mechanism includes a gear and a rack engaged with each other, the rack is arranged along the moving direction of the inserting plate and fixed with the inserting plate, and the driving shaft is in transmission connection with the gear.

Optionally, the transmission mechanism includes a chain rope, the number of the driving mechanisms is two and is respectively located on two sides of the insertion plate, one end of the chain rope is fixed to the insertion plate, and the other end of the chain rope is wound on the outer side of the driving shaft.

Optionally, bearing seats are respectively arranged on two side walls of the valve cavity, and two ends of the driving shaft are respectively fixed with the two bearing seats.

Optionally, the driving part is a hand wheel, and the driving end is further provided with a plug-in connector matched with the hand wheel.

Optionally, the valve body is towards one side terminal surface of feed inlet still is equipped with the access hole and is used for the shutoff the access cover of access hole, the access hole with the valve pocket intercommunication.

Optionally, the valve body orientation a side end face of discharge gate still is equipped with fluidizer, fluidizer includes backup pad, fluidization canvas and air inlet portion, the backup pad orientation the one end of discharge gate is less than and keeps away from the one end of discharge gate, fluidization canvas can be fixed in the internal surface of backup pad, air inlet portion can to the backup pad with air feed between the fluidization canvas.

Optionally, the support plate is detachably connected with the side wall of the valve cavity.

Optionally, the feed inlet is of a structure gradually expanding from inside to outside.

Optionally, a reinforcing beam is arranged in the middle of the feed inlet.

Drawings

FIG. 1 is a schematic view of a gate valve with a gear and rack included in the transmission;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the internal structure of FIG. 1;

FIG. 4 is a schematic view of the gate valve configuration when the transmission includes a chain rope;

FIG. 5 is a top view of FIG. 4;

fig. 6 is a schematic view of the internal structure of fig. 4.

In the accompanying fig. 1-6, the reference numerals are illustrated as follows:

1-valve body, 11-valve cavity, 12-feed inlet, 13-discharge outlet, 14-reinforcing beam; 2, inserting a board; 3-drive shaft, 31-drive end; 4-transmission mechanism, 41-gear, 42-rack, 43-chain; 5, bearing seats; 6-hand wheel; 7-access cover; 8-fluidizing device, 81-support plate, 82-fluidizing canvas, 83-air inlet.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-6, fig. 1 is a schematic structural view of a gate valve when a transmission mechanism includes a gear and a rack; FIG. 2 is a top view of FIG. 1; FIG. 3 is a schematic view of the internal structure of FIG. 1; FIG. 4 is a schematic view of the gate valve configuration when the transmission includes a chain rope; FIG. 5 is a top view of FIG. 4; fig. 6 is a schematic view of the internal structure of fig. 4.

The embodiment of the invention provides a gate valve which comprises a valve body 1, a gate 2 and a driving assembly, wherein the valve body 1 is provided with a valve cavity 11, a feeding hole 12 and a discharging hole 13 which are communicated with the valve cavity 11, the gate 2 is positioned in the valve cavity 11 and can block the feeding hole 12, the driving assembly comprises a driving piece, a driving shaft 3 and a transmission mechanism 4, the driving shaft 3 can drive the gate 2 to move through the transmission mechanism 4 to open and close the feeding hole 12, a sealing device is arranged between the driving end of the driving shaft 3, which penetrates through the side wall of the valve cavity 11, and the driving end is in transmission connection with the driving piece outside the valve cavity 11, namely, the driving shaft 3 is rotated outside the valve cavity 11 through the driving end, so that the driving shaft drives the gate 2 to move through the transmission mechanism 4 to.

In detail, in this embodiment, the inserting plate 2 is tightly attached to the feeding hole 12 and can close the feeding hole 12, when the driving assembly drives the inserting plate 2 to move in the valve cavity 11 to open and close the feeding hole 12, because the inserting plate 2 moves in the valve cavity 11, the valve cavity 11 is still a closed cavity, and only two openings, namely the feeding hole 12 and the discharging hole 13, are provided, dust in the valve cavity 11 cannot leak to the external environment, that is, in this embodiment, a sealing device is not required to be arranged between the inserting plate 2 and the feeding hole 12.

The driving shaft 3 penetrates through the side wall of the valve cavity 11, and a sealing device (such as a sealing filler) is arranged between the driving shaft 3 and the side wall of the valve cavity 11, so that dust in the valve cavity 11 can be prevented from leaking out along a gap between the driving shaft 3 and the side wall, and the area of the contact area between the driving shaft 3 and the side wall is obviously smaller than that of the contact area between the inserting plate 2 and the feeding hole 12.

In the present embodiment, two schemes are given for the arrangement of the transmission mechanism 4, the transmission mechanism 4 in the first scheme includes a structure of a gear 41 and a rack 42, and the transmission mechanism 4 in the second scheme includes a chain rope 43, which will be described in detail below.

When the transmission mechanism 4 comprises a gear 41 and a rack 42 which are engaged with each other, as shown in fig. 1-3, the rack 42 is arranged along the moving direction of the inserting plate 2, and the rack 42 is fixed with the inserting plate 2, the gear 41 is coaxially transmitted with the driving shaft 3, that is, the driving shaft 3 can drive the gear 41 to rotate when rotating around the rotation axis thereof, and the rotation of the gear 41 can drive the inserting plate 2 to move by the engagement with the rack 42, so as to realize the opening and closing of the feeding hole 12, or in this embodiment, the rack 42 can also be provided as a chain, and the structure of the gear 41 and the rack 42 can make the power transmission more stable.

When the transmission mechanism 4 comprises the chain rope 43, as shown in fig. 4-6, the number of the driving mechanisms is two, and the two groups of driving mechanisms are respectively located at two sides of the inserting plate 2, one end of the chain rope 43 is fixed with the inserting plate 2, the other end is wound outside the driving shaft 3, the driving shaft 3 can drive the chain rope 43 to be wound outside the driving shaft 3 when rotating, that is, one of the two driving shafts 3 is used as a driving shaft and the other is used as a driven shaft, the driving shaft and the driven shaft are determined according to the moving direction of the inserting plate 2, the driving shaft 3 facing to the front side of the inserting plate 2 is a driving shaft, the driving shaft 3 facing to the rear side is a driven shaft, the chain rope 43 connected with the driving shaft can be wound outside the driving shaft when rotating, so as to reduce the length of the chain rope 43 between the driving shaft and the inserting plate 2, thereby driving the inserting plate 2 to move to one side, and the driven shaft is rotated to increase the length of the chain rope 43 between the driven shaft and the insert plate 2, and the driving shaft and the driven shaft are replaced when the insert plate 2 is moved in the reverse direction. Specifically, the chain rope 43 may be a steel wire rope, a hemp rope, a chain, or the like, and is not limited specifically herein.

Of course, in this embodiment, the transmission mechanism 4 may also be configured as a screw rod and a nut, the nut is fixed to the board 2, and the rotation of the screw rod can drive the board 2 to move through the nut. Due to the fact that dust in the valve cavity 11 is large, when the transmission mechanism 4 is arranged to be the gear 41 and the rack 42 or the transmission mechanism 4 is arranged to include the chain rope 43, the situation that the dust falls into the transmission mechanism 4 after long-time use to affect the operation stability of the transmission mechanism 4 can be avoided.

In the above embodiment, the outer walls of the two sides of the valve cavity 11 are respectively provided with the bearing seats 5, the two ends of the driving shaft 3 are respectively fixed with the bearing seats 5, the rotation of the driving shaft 3 can be more stable due to the arrangement of the bearing seats 5, so that the sealing effect of the sealing device is stable, the situation that the driving shaft 3 generates axial float and is abraded with the sealing device is avoided, the service life of the sealing device is ensured, and the sealing effect after long-term use is ensured.

In the above embodiment, the driving member is a handwheel 6, and the driving end 31 of the driving shaft 3 is further provided with a plug-in connector adapted to the handwheel 6, that is, the handwheel 6 is detachably connected to the plug-in connector, so that the flexibility is good. As shown in fig. 3 and 6, when both ends of the driving shaft 3 are driving ends 31 provided with plugs, the hand wheel 6 can be installed on one side convenient for operation according to the situation of the field to rotate the driving shaft 3. Alternatively, in the embodiment, the driving shaft 3 can be driven to rotate by the motor, and the cost can be reduced and the economy can be improved by driving the hand wheel 6.

In the above embodiment, as shown in fig. 1 to 3, an access opening and an access cover 7 for blocking the access opening are further provided on one side end surface of the valve body 1 facing the inlet 12 (when in use, the side end surface is often located above), the access opening is communicated with the valve chamber 11, and the access cover 7 can block and seal the access opening. This access hole is convenient for overhaul the operation to the structure of valve pocket 11 inside, and is concrete, and this access hole set up position, size and quantity and do not do specific restriction, can arrange according to actual conditions.

In the above embodiment, as shown in fig. 3, the end surface of the valve body 1 on the side facing the discharge port 13 (the end surface is often located below when in use) is further provided with the fluidizing device 8, the fluidizing device 8 includes the support plate 81, the fluidizing canvas 82, and the air inlet 83, the end of the support plate 81 facing the discharge port 13 is lower than the end far from the discharge port 13, that is, the support plate 81 is disposed obliquely, the fluidizing canvas 82 can be fixed to the inner surface of the support plate 81, and the air inlet 83 can supply air between the support plate 81 and the fluidizing canvas 82. When used for a long time, the dust in the valve chamber 11 falls down onto the fluidization canvas 82, and the air is introduced between the support plate 81 and the fluidization canvas 82 through the air inlet 83 to lift and roll the fluidization canvas 82 upward, and shakes the dust falling on the upper surface thereof to fall down along the inclined surface and be discharged along the discharge port 13. The arrangement of the fluidizing device 8 avoids dust deposition dead corners in the valve cavity 11 and ensures the cleanness of the valve cavity 11. Specifically, the air supply portion may supply air periodically or continuously, and is not limited herein.

In the above embodiment, the support plate 81 is detachably attached to the side wall (bottom wall) of the valve chamber 11, so that the support plate 81 and the fluidized canvas 82 can be easily cleaned and repaired, and the structure inside the valve chamber 11 can be easily repaired from below. As shown in fig. 3, in the present embodiment, the support plate 81 and the fluidization canvas 82 are fixed to the side wall of the valve cavity 11 by fixing bolts, or may be fixed by a fastening member, and the like, which is not limited in this respect.

In the above embodiment, the feeding hole 12 is a gradually expanding structure arranged from inside to outside, and the gradually expanding feeding hole 12 can achieve the leading-in effect, so that the feeding is facilitated.

In addition, in this embodiment, a reinforcing beam 14 is further disposed in the middle of the inlet 12 to increase the overall structural strength of the side wall of the valve chamber 11. Specifically, in this embodiment, as shown in fig. 1 to 3, the number of the insert plates 2 is two, the number of the corresponding driving assemblies is also two, each insert plate 2 corresponds to one driving assembly, the two insert plates 2 can respectively move to opposite sides to open the feeding hole 12, and the two insert plates 2 can respectively move to opposite sides to close the feeding hole 12. Or, in this embodiment, the gate valve 2 may be further configured as one gate, and the driving assemblies may be configured as a group, and may be specifically arranged according to the size of the gate valve, the size of the feeding hole 12, and the like, which is not specifically limited herein.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A gate valve, comprising:

the valve body (1) is provided with a valve cavity (11), and a feeding hole (12) and a discharging hole (13) which are communicated with the valve cavity (11);

the inserting plate (2) is positioned in the valve cavity (11) and can block the feed port (12);

drive assembly, including driving piece, drive shaft (3) and drive mechanism (4), the rotation of drive shaft (3) can pass through drive mechanism (4) drive picture peg (2) remove with the switching feed inlet (12), the drive end of drive shaft (3) passes the lateral wall of valve pocket (11) and with the driving piece is connected, drive shaft (3) with be equipped with sealing device between the lateral wall of valve pocket (11).

2. A gate valve according to claim 1, characterised in that the transmission mechanism (4) comprises a gear wheel (41) and a toothed rack (42) which are in engagement with each other, the toothed rack (42) being arranged in the direction of movement of the gate (2) and being fixed to the gate (2), the drive shaft (3) being in driving connection with the gear wheel (41).

3. The gate valve according to claim 1, wherein the transmission mechanism (4) comprises two sets of chain ropes (43), the driving mechanisms are respectively located on two sides of the gate (2), one end of each chain rope (43) is fixed with the gate (2), and the other end of each chain rope is wound on the outer side of the driving shaft (3).

4. A gate valve according to any one of claims 1-3, characterised in that bearing seats (5) are provided on both side walls of the valve chamber (11), and both ends of the drive shaft (3) are fixed to the two bearing seats (5) respectively.

5. A gate valve according to any one of claims 1-3, characterised in that the driving member is a hand wheel (6), and the driving end is further provided with a plug fitting adapted to the hand wheel (6).

6. A gate valve according to any one of claims 1-3, characterised in that the valve body (1) is further provided with an access opening and an access cover (7) for blocking the access opening on the side surface facing the inlet opening (12), the access opening being in communication with the valve chamber (11).

7. The gate valve according to any one of claims 1-3, characterized in that a fluidizing device (8) is further provided on one side end surface of the valve body (1) facing the discharge port (13), the fluidizing device (8) comprises a supporting plate (81), fluidizing canvas (82) and an air inlet portion (83), one end of the supporting plate (81) facing the discharge port (13) is lower than the end far away from the discharge port (13), the fluidizing canvas (82) can be fixed on the inner surface of the supporting plate (81), and the air inlet portion (83) can supply air between the supporting plate (81) and the fluidizing canvas (82).

8. The gate valve according to claim 7, characterized in that the support plate (81) is detachably connected to a side wall of the valve chamber (11).

9. A gate valve according to any one of claims 1-3, characterised in that the feed opening (12) is of a diverging configuration from the inside outwards.

10. A gate valve according to any one of claims 1-3, characterised in that the feed opening (12) is provided with a reinforcement beam (14) in the middle.