阅读说明：本技术 一种双轮双控手动闸阀及操作方法 (Double-wheel double-control manual gate valve and operation method ) 是由 苏航 张辛悦 于 2021-10-19 设计创作，主要内容包括：本发明涉及一种双轮双控手动闸阀及操作方法,包括阀杆、闸板升降手轮、阀体、闸板、密封件、端盖,所述的阀体内设有主动齿轮、被动齿轮、移动式密封环,主动齿轮和被动齿轮组成齿轮传动副,移动式密封环和被动齿轮组成螺旋传动副；所述的密封件固定设置在移动式密封环上；所述的阀体外设有密封件移动手轮,密封件移动手轮经传动轴与主动齿轮连接。密封件可以由密封件移动手轮控制其沿轴心方向平移,闸板移动之前,密封件先离开闸板密封面；待闸板移动到位之后,密封件再回移并压紧闸板密封面,本发明的阀门密封性能更可靠、操作更省力、且大幅延长了闸阀的使用寿命。(The invention relates to a double-wheel double-control manual gate valve and an operation method, and the double-wheel double-control manual gate valve comprises a valve rod, a gate plate lifting hand wheel, a valve body, a gate plate, a sealing element and an end cover, wherein a driving gear, a driven gear and a movable sealing ring are arranged in the valve body; the sealing element is fixedly arranged on the movable sealing ring; and a sealing element moving hand wheel is arranged outside the valve body and is connected with the driving gear through a transmission shaft. The sealing element can be controlled to move horizontally along the axis direction by a sealing element moving hand wheel, and before the flashboard moves, the sealing element leaves the sealing surface of the flashboard; after the flashboard moves in place, the sealing element moves back and presses the sealing surface of the flashboard, the valve has more reliable sealing performance and more labor-saving operation, and the service life of the gate valve is greatly prolonged.)

1. A double-wheel double-control manual gate valve comprises a valve rod, a gate plate lifting hand wheel, a valve body, a gate plate, a sealing element and an end cover, wherein the gate plate lifting hand wheel is connected with the gate plate through the valve rod; the sealing element and the sealing surface of the flashboard are correspondingly and fixedly arranged on the movable sealing ring; and a sealing element moving hand wheel is arranged outside the valve body and is connected with the driving gear through a transmission shaft.

2. The double-wheel double-control manual gate valve according to claim 1, wherein the driven gear is arranged in a gear ring structure, an internal thread structure is arranged on the gear ring, and the gear ring of the driven gear is coaxial with the internal thread.

3. The double-wheel double-control manual gate valve according to claim 1, wherein the movable sealing ring is provided with an external thread structure, and the external thread structure is matched with the internal thread of the gear ring.

4. The double-wheel double-control manual gate valve according to claim 1, wherein the driving gear and the driven gear are arranged in a conical gear structure, one driving gear is arranged, two driven gears are arranged, the driving gear drives the two driven gears simultaneously, the two driven gears are arranged on two sides of the gate plate respectively, and the movable sealing rings and the driven gears are arranged on two sides of the gate plate correspondingly; the driven gear and the movable sealing ring respectively form a spiral transmission pair, and the transmission directions of the spiral transmission pairs on the two sides of the flashboard are opposite.

5. The double-wheel double-control manual gate valve according to claim 1, wherein the driving gear and the driven gear are arranged in a conical gear structure, one driving gear is arranged, one driven gear is arranged, the driving gear drives the driven gear, the driven gear is arranged on one side of the gate plate, and the movable sealing ring and the driven gear are correspondingly arranged on the same side of the gate plate to form a spiral transmission pair.

6. The double-wheel double-control manual gate valve according to claim 1, wherein the driving gear and the driven gear are arranged in a cylindrical gear structure, two driving gears and two driven gears are arranged, the two driving gears are connected in series on the same transmission shaft, and the two driven gears are respectively arranged on two sides of the gate plate; the movable sealing rings and the driven gear are correspondingly arranged on two sides of the flashboard; the driven gear and the movable sealing ring respectively form a spiral transmission pair, and the transmission directions of the spiral transmission pairs on the two sides of the flashboard are opposite.

7. The double-wheel double-control manual gate valve according to claim 1, wherein the driving gear and the driven gear are arranged in a cylindrical gear structure, one driving gear is arranged, one driven gear is arranged, the driving gear drives the driven gear, the driven gear is arranged on one side of the gate plate, and the movable sealing ring and the driven gear are correspondingly arranged on the same side of the gate plate to form a spiral transmission pair.

8. The double-wheel double-control manual gate valve according to claim 1, wherein a flushing inlet for flushing the inner cavity of the valve is formed at the upper part of the valve body, and a flushing discharge port is formed at the lower part of the valve body.

9. The double-wheel double-control manual gate valve according to claim 1, wherein a guide pin is movably arranged on the end surface of the movable sealing ring, and the other end of the guide pin is movably arranged on the end cover.

10. The operating method of a double-wheel double-control manual gate valve according to claim 1, characterized by comprising the steps of: in the first stage, a sealing element is used for moving a hand wheel, and a movable sealing ring is driven to axially translate through a gear transmission pair and a screw transmission pair, so that the sealing element is separated from a flashboard; in the second stage, a flashboard lifting hand wheel is used for driving the flashboard to lift or lower to a working position through a valve rod screw transmission pair; and in the third stage, the sealing element is used for moving the hand wheel to drive the movable sealing ring to move back until the sealing element is tightly pressed on the sealing surface of the flashboard.

Technical Field

The invention belongs to the technical field of valves, and particularly relates to a double-wheel double-control manual gate valve and an operation method.

Background

The gate valve and the ball valve which are used in the market at present are sealing structures which fixedly arrange sealing elements in a valve body, and the structures have the following defects: when the valve is opened, the sealing element is pressed tightly on the sealing surface of the valve clack, the friction resistance from the sealing element needs to be overcome when the valve clack is moved, and the friction resistance is increased by times along with the increase of the fluid pressure in the pipe and the drift diameter of the valve, so that the opening and closing resistance of the valve is increased, and the sealing element is easily worn by the valve clack or damaged by the edge of the valve clack. Secondly, the inner cavity of the valve is easily blocked by sediments in fluid (such as slurry and ore pulp), the moving resistance of the valve clack is increased, and the opening and closing function is disabled when the blockage is serious. These disadvantages shorten the service life of the valve and limit the range of applications.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the double-wheel double-control manual gate valve through careful development and repeated tests.

The invention also aims to provide an operation method of the double-wheel double-control manual gate valve.

In order to achieve the purpose, the invention adopts the following technical scheme.

A double-wheel double-control manual gate valve comprises a valve rod, a gate plate lifting hand wheel, a valve body, a gate plate, a sealing element and an end cover, wherein the gate plate lifting hand wheel is connected with the gate plate through the valve rod, one end of the end cover is connected with the valve body, the other end of the end cover is provided with a handle hole and a sealing end surface which are connected with a pipeline flange according to an industrial standard, a driving gear, a driven gear and a movable sealing ring are arranged in the valve body, the driving gear and the driven gear form a gear transmission pair, and the movable sealing ring and the driven gear form a spiral transmission pair; the sealing element and the sealing surface of the flashboard are correspondingly and fixedly arranged on the movable sealing ring; and a sealing element moving hand wheel is arranged outside the valve body and is connected with the driving gear through a transmission shaft.

In a preferred embodiment of the present invention, the driven gear is provided in a ring gear structure, and the ring gear is provided with an internal thread structure, and the ring gear of the driven gear is coaxial with the internal thread.

As a preferable scheme of the invention, the movable sealing ring is provided with an external thread structure, and the external thread structure is matched with the internal thread of the gear ring.

As a preferred scheme of the invention, the driving gear and the driven gear are arranged in a conical gear structure, one driving gear is arranged, two driven gears are arranged, one driving gear drives the two driven gears at the same time, the two driven gears are respectively arranged at two sides of the gate plate, and the movable sealing ring and the driven gears are correspondingly arranged at two sides of the gate plate; the driven gear and the movable sealing ring respectively form a spiral transmission pair, and the transmission directions of the spiral transmission pairs on the two sides of the flashboard are opposite.

As a preferred scheme of the invention, the driving gear and the driven gear are in a conical gear structure, one driving gear is arranged, one driven gear is arranged, one driving gear drives one driven gear, the driven gear is arranged on one side of the gate plate, and the movable sealing ring and the driven gear are correspondingly arranged on the same side of the gate plate to form a spiral transmission pair.

As a preferred scheme of the invention, the driving gear and the driven gear are arranged in a cylindrical gear structure, two driving gears and two driven gears are arranged, the two driving gears are connected in series on the same transmission shaft, and the two driven gears are respectively arranged at two sides of the flashboard; the movable sealing rings and the driven gear are correspondingly arranged on two sides of the flashboard; the driven gear and the movable sealing ring respectively form a spiral transmission pair, and the transmission directions of the spiral transmission pairs on the two sides of the flashboard are opposite.

As a preferred scheme of the present invention, the driving gear and the driven gear are arranged in a cylindrical gear structure, one driving gear is arranged, one driven gear is arranged, the driving gear drives the driven gear, the driven gear is arranged on one side of the gate plate, and the movable sealing ring and the driven gear are correspondingly arranged on the same side of the gate plate to form a spiral transmission pair.

As a preferable scheme of the invention, the upper part of the valve body is provided with a flushing inlet used for flushing an inner cavity of the valve, and the lower part of the valve body is provided with a flushing discharge hole.

In a preferred embodiment of the present invention, the end surface of the movable sealing ring is movably provided with a guide pin, and the other end of the guide pin is movably disposed on the end cap.

The operation method of the double-wheel double-control manual gate valve comprises the following steps: in the first stage, a sealing element is used for moving a hand wheel, and a movable sealing ring is driven to axially translate through a gear transmission pair and a screw transmission pair, so that the sealing element is separated from a flashboard; in the second stage, a flashboard lifting hand wheel is used for driving the flashboard to lift or lower to a working position through a valve rod screw transmission pair; and in the third stage, the sealing element is used for moving the hand wheel to drive the movable sealing ring to move back until the sealing element is tightly pressed on the sealing surface of the flashboard.

The invention has the following beneficial effects:

the double-wheel double-control manual gate valve provided by the invention has the following direct effects that the process of opening (or closing) the valve is completed in three stages: firstly, the sealing element is not abraded or cut and damaged due to the movement of the flashboard; when the flashboard is lifted, no frictional resistance comes from the sealing element; the sealing effect is not influenced by the abrasion of the sealing element; and fourthly, the inner cavity of the valve is a closed space, so that the easy sediment entering the inner cavity can be conveniently cleaned. Compared with the prior art, the sealing performance is more reliable, the operation is more labor-saving, and the service life of the valve can be greatly prolonged.

Drawings

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the following description will be made in detail with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the present technology, are intended for purposes of illustration only and are not intended to limit the present technology.

Fig. 1 is a schematic structural view of an embodiment 1 of a double-wheel double-control manual gate valve according to the present invention.

FIG. 2 is a sectional view taken along line A-A of a schematic structure of example 1.

Fig. 3 is a schematic structural view of embodiment 2 of a double-wheel double-control manual gate valve according to the present invention.

Fig. 4 is a schematic structural view of embodiment 3 of a double-wheel double-control manual gate valve according to the present invention.

Fig. 5 is a schematic structural view of embodiment 4 of a double-wheel double-control manual gate valve according to the present invention.

The labels in the figure are: 1 is a gate plate lifting hand wheel; 2, a sealing element moving hand wheel; 3 is a valve rod; 4 is a flashboard; 5 is a valve body; 6 is an end cover; 7 is a sealing element; 8 is a movable sealing ring; 9 is a guide pin; 10 is a driven gear; 11 is a driving gear; 12 is a ratchet wheel handle; k is a flushing inlet; f is a flushing discharge port.

Detailed Description

The following describes a dual-wheel dual-control manual gate valve in more detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, a double-wheel double-control manual gate valve comprises a gate plate lifting hand wheel 1; a valve stem 3; a shutter 4; a valve body 5; an end cap 6; a seal 7; k is a flushing inlet; f is a flushing discharge port, a gate plate lifting hand wheel 1 is connected with a gate plate 4 through a valve rod 3, and a valve rod screw transmission pair drives the gate plate to lift or descend; one end of the end cover 6 is connected with the valve body 5, and the other end of the end cover 6 is provided with a handle hole and a sealing end face which are connected with a pipeline flange according to the industry standard. A driving gear 11, a driven gear 10 and a movable sealing ring 8 are arranged in the valve body 5, the driving gear 11 and the driven gear 10 form a gear transmission pair, and the movable sealing ring 8 and the driven gear 10 form a spiral transmission pair; the sealing element 7 and the sealing surface of the flashboard are correspondingly and fixedly arranged on the movable sealing ring 8; and a sealing element moving hand wheel 2 is arranged outside the valve body 5, and the sealing element moving hand wheel 2 is connected with the driving gear 11 through a transmission shaft.

The driving gear 11 and the driven gear 10 are set to be in a conical gear structure, the driven gear 10 is set to be in an outer gear ring structure and is provided with an inner thread structure, and the outer gear ring and the inner thread of the driven gear are coaxial.

And an external thread structure is arranged on the movable sealing ring 8 and is matched with the internal thread of the gear ring. The end face of the movable sealing ring 8 is movably provided with a guide pin 9, and the other end of the guide pin 9 is movably arranged on the end cover 6. The guide pin is used for controlling the movable sealing ring to reciprocate along the axial direction of the movable sealing ring under the drive of the screw transmission pair.

The driving gear be equipped with one, the driven gear is equipped with two, driving gear 11 drives two driven gear 10 simultaneously, two driven gear 10 set up respectively in flashboard 4 both sides, flashboard 4 both sides correspond driven gear 10 and set up portable sealing ring 8, driven gear and portable sealing ring constitute screw drive pair respectively, the vice transmission opposite direction of screw drive of flashboard 4 both sides.

The valve body 5 consists of an upper section, a middle section and a lower section, the upper section part is provided with a flushing inlet K for flushing the inner cavity of the valve and a flushing discharge port F of the lower section part of the valve body.

The opening or closing process of the gate valve is completed in three stages: in the first stage, the sealing element is used for moving the hand wheel 2, and the movable sealing ring 8 is driven to axially translate through the gear transmission pair and the screw transmission pair, so that the sealing element 7 is separated from the flashboard 4; in the second stage, a flashboard lifting hand wheel 1 is used for driving a flashboard 4 to lift (or lower) to a working position through a valve rod screw transmission pair; and in the third stage, the sealing element moving hand wheel 2 is used for driving the movable sealing ring 8 to move back until the sealing element 7 is tightly pressed on the sealing surface of the flashboard 4.

Example 2

As shown in fig. 3, in the double-wheel double-control manual gate valve, one driving gear and one driven gear are provided, the driving gear drives the driven gear, the driven gear is arranged on one side of the gate plate, and the movable sealing ring and the driven gear are correspondingly arranged on the same side of the gate plate to form a spiral transmission pair; the other structure is the same as that of embodiment 1.

Example 3

As shown in fig. 4, in the double-wheel double-control manual gate valve, a driving gear 11 and a driven gear 10 are arranged in a cylindrical gear structure, the driven gear 10 is arranged in an external gear ring structure and is provided with an internal thread structure, and the gear ring and the internal thread structure are coaxial; two driving gears 11 are connected in series on the same transmission shaft, and the transmission shaft is connected with a sealing element moving hand wheel 2 or a ratchet wheel carrying handle 12 by a common mechanical transmission mechanism; two driven gears 10 are arranged corresponding to the two driving gears 11, and the two driven gears are respectively arranged on two sides of the flashboard 4; the movable sealing rings and the driven gear are correspondingly arranged on two sides of the flashboard; the driven gear and the movable sealing ring respectively form a spiral transmission pair, and the transmission directions of the spiral transmission pairs on the two sides of the flashboard are opposite; otherwise, the same procedure as in example 1 was repeated.

Example 4

As shown in fig. 5, in the double-wheel double-control manual gate valve, the driving gear and the driven gear are arranged in a cylindrical gear structure, one driving gear is arranged, one driven gear is arranged, the driving gear drives the driven gear, the driven gear is arranged on one side of the gate plate, and the movable sealing ring and the driven gear are correspondingly arranged on the same side of the gate plate to form a spiral transmission pair; the rest is the same as example 3.

The installation mode, the connection mode or the setting mode of all the components are common mechanical connection modes, wherein the sliding/rotating fixation is that the components do not fall off under the sliding/rotating state, and the specific structures, models and coefficient indexes of all the components are self-contained technologies, so long as the beneficial effects can be achieved, the implementation is not repeated herein.

The above detailed description of the present invention is only used for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention, and it should be understood by those skilled in the art that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.