Rotary double-gate valve

Abstract

The utility model discloses a rotary type double-gate valve which comprises a valve body, a valve body channel is formed in the center of the valve body in the vertical direction, and an adjusting cavity which extends towards the outer portion of the front end of the valve body and facilitates rotary opening and closing of valve body gates is formed in the center of the inner side of the valve body channel. Through the combined use of the air cylinder, the connecting rod, the flashboard rotating shaft, the swing arm, the spring, the connecting sleeve, the connector, the spring seat, the connecting sleeve ring piece and the valve body, the flashboard rotating shaft can be driven to rotate under the swing of the connecting amplitude driven by the air cylinder; the other end of the flashboard rotating shaft drives the swing arm to drive the two flashboards to rotate and move in the adjusting cavity through the spring to open or close the double-flashboard valve, so that rotary opening and closing of the double-flashboard valve can be realized, and telescopic transmission of the flashboards is changed into rotary opening and closing; when the gate rotating shaft rotates, adhered ash cannot be brought out of the valve body to reduce the sealing performance of the double-gate valve, so that the service life of the double-gate valve can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of double-disc gate valves, and in particular relates to a rotary double-disc gate valve. Background Art

[0002] The gate valve is a gate plate of an opening and closing part. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface will be welded with metal materials to increase wear resistance. The gate plate has a rigid gate plate and an elastic gate plate. According to the difference in the gate plate, the gate valve is divided into a rigid gate valve and an elastic gate valve. The principle of the traditional gate valve is to use the valve stem to move relative to the inside of the valve body, and then drive the gate to open and close the internal channel of the valve body, so as to achieve the purpose of opening and closing the gate. However, the gate valve has the following problems during use: During the use of the gate valve, the contact wear between the gate plate and the valve body is relatively serious. When used for a long time, the valve body is prone to water or air leakage. The sealing type of the valve body is poor, and the parts in the valve body are prone to wear and damage.

[0003] To this end, a ceramic double gate valve with the announcement number of "CN215059595U" includes a valve body, an adjusting cavity is opened in the vertical direction of the center of the valve body, channels are opened on both sides of the lower end of the adjusting cavity, and gates are provided with two gates. The two gates are arranged at the lower end of the adjusting cavity and seal the channel. A second conical surface is opened on the inner side of the two gates, a valve stem, the valve stem is vertically penetrated into the interior of the adjusting cavity, and first conical surfaces matching the second conical surfaces are provided on both sides of the lower end of the valve stem. A tensioning device is arranged between the two gates, and the two ends of the tensioning device are respectively connected to the two gates. The tensioning device includes a reset rod and a reset spring, and one end of the reset rod is consolidated with the inner side of a single gate, which solves the problem that the valve body parts are easily worn when the existing gate valve is in use, avoids air leakage or water leakage when the valve body is used for a long time, effectively improves the durability and sealing of the valve body, and makes the gate more durable and reliable.

[0004] However, for the above-mentioned ceramic double-disc valve, although the first conical surface at the lower end of the valve stem is driven to approach the second conical surface arranged on the inner side of the gate plate when the valve stem descends inside the valve body, and the valve stem descends, the following obvious defects still exist during use: the above-mentioned double-disc valve relies on the telescopic transmission of the cylinder rod, and the telescopic transmission of the cylinder rod can easily bring the adhered ash out of the valve body, causing friction damage between the sealing ring and the ash. Utility Model Content

[0005] The utility model aims to provide a rotary double-disc valve to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotary double-disc valve, comprising:

[0007] Valve body, a valve body passage is vertically opened in the center of the valve body, and an adjustment cavity extending outward from the inner center position of the valve body passage to the front end of the valve body and facilitating the rotation and opening / closing of the valve body gate is provided;

[0008] Gate, there are two gates, the two gates are arranged at the upper and lower ends of the adjustment cavity, and a rocker arm extending into the valve body passage is connected by a spring in the middle of the corresponding surfaces of the two gates;

[0009] Cylinder, the cylinder is arranged on one side of the upper end face outside the adjustment cavity, one end of the piston rod of the cylinder is movably connected with a connecting rod, and the other end of the connecting rod is vertically connected with a gate rotating shaft that is hermetically inserted into the inner side of the adjustment cavity through a bearing part and is fixedly connected with one end of the rocker arm.

[0010] Preferably, one end of the connecting rod is connected with a connecting sleeve with a locking screw, and the connecting sleeve is sleeved on the upper end of the gate rotating shaft and locked and fixed by the locking screw, so that the expansion and contraction of the cylinder can drive the connecting rod to swing in amplitude by using the connecting head, and drive the gate rotating shaft to rotate and open / close.

[0011] Preferably, one end of the piston rod of the cylinder is provided with a connecting head with a pin shaft, the other end of the connecting rod is inserted into the connecting head and connected through the pin shaft, and the expansion and contraction of the piston rod of the cylinder drives the connecting rod to swing in amplitude by using the connecting head to realize the rotation of the gate rotating shaft in the cylinder.

[0012] Preferably, a spring seat is embedded and installed in a groove provided at the center position of the corresponding surfaces of the two gates, and both ends of the spring are inserted into the inside of the spring seat for fixation, and a ceramic ring is embedded and installed on the outer side of the contact surface between the gate and the inner wall of the adjustment cavity, which can make the rotation of the gate rotating shaft drive the angle of the swing arm to rotate, so that the gate rotates into the valve body passage to close or open.

[0013] Preferably, a cover plate with a skeleton oil seal structure is sleeved on one end of the gate rotating shaft located inside the adjustment cavity, and the cover plate is fixed on the inner wall of one side of the upper end of the adjustment cavity, which can increase the sealing performance during the rotation between the valve body and the gate valve rotating shaft.

[0014] Preferably, one end of the rocker arm is provided with a connecting sleeve ring part, and the connecting sleeve ring part is sleeved on the outside of one end of the gate rotating shaft and locked and fixed by a round nut, so that the rotation of the gate rotating shaft can drive the swing arm to rotate and drive the gate to rotate circumferentially.

[0015] Compared with the prior art, the technical effects and advantages of the present utility model are as follows: For this rotary double gate valve, through the combined use of a cylinder, a connecting rod, a gate shaft, a swing arm, a spring, a connecting sleeve, a connecting head, a spring seat, a connecting sleeve ring and the valve body, the gate shaft can be driven by the cylinder to swing in a certain range and then rotate, and the other end of the gate shaft drives the swing arm to drive the two gates to rotate and move inside the adjustment cavity through the spring to open or close the double gate valve, thus realizing the rotary opening and closing of the double gate valve. As a result, the telescopic transmission of the gate is changed to a rotary opening and closing, which can prevent the adhered ash from being carried out of the valve body when the gate shaft rotates, reducing the sealing performance of the double gate valve, and further extending the service life of the double gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a front view structural schematic diagram of the present utility model.

[0018] In the figure: 1, valve body; 2, valve body passage; 3, adjustment cavity; 4, gate; 5, rocker arm; 6, cylinder; 7, connecting rod; 8, gate shaft; 9, connecting sleeve; 10, connecting head; 11, spring seat; 12, ceramic ring; 13, cover plate; 14, connecting sleeve ring; 15, spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figure 1-2 , the present utility model provides a technical solution: a rotary double gate valve, comprising:

[0021] A valve body 1, a valve body passage 2 is vertically opened in the center of the valve body 1 to facilitate the entry and output of materials, and an adjustment cavity 3 extending outward from the inner center position of the valve body passage 2 to the front end of the valve body 1 and facilitating the rotary opening and closing of the valve body gate is provided. The adjustment cavity 3 is conducive to the two gates 4 rotating from one side to the other side inside to realize the rotary opening and closing of the double gate valve;

[0022] The gate plates 4, two of the gate plates 4 are provided, and the two gate plates 4 are arranged at the upper and lower ends of the adjustment cavity 3 and are located at one end of the adjustment cavity 3 to realize the rotation of the gate shaft 8. The middle parts of the corresponding surfaces of the two gate plates 4 are connected by a spring 15 with a rocker arm 5 extending towards the valve body passage 2. The two stacked and combined gate plates 4 can be adjusted to rotate at the central position inside the adjustment cavity 3 and inside the valve body passage 2 of the valve body. In the grooves provided at the central positions of the corresponding surfaces of the two gate plates 4, spring seats 11 are embedded and installed. The two ends of the spring 15 are inserted into the interior of the spring seats 11 for fixation. And on the outer side of the contact surface between the gate plate 4 and the inner wall of the adjustment cavity 3, a ceramic ring 12 is embedded and installed. At the connection part of the adjustment cavity 3 and the gate shaft 8, a sealed bearing seat is provided, and a spacer ring is provided in the sealed bearing seat at an interval from the gate shaft 8 to reduce the friction between the bearing parts and the surface of the gate shaft 8;

[0023] The air cylinder 6, the air cylinder 6 is arranged on one side of the upper end surface outside the adjustment cavity 3. One end of the piston rod of the air cylinder 6 is provided with a connecting head 10 with a pin shaft. One end of the piston rod of the air cylinder 6 is movably connected with a connecting rod 7. And one end of the connecting rod 7 is connected with a connecting sleeve 9 with a locking screw for sleeving and fixing with the gate shaft 8. The other end of the connecting rod 7 is vertically connected with a gate shaft 8 that is hermetically inserted into the inside of the adjustment cavity 3 through a bearing part on one side and is fixedly connected with one end of the rocker arm 5, which can rotate the two gate plates 4. And the connecting sleeve 9 is sleeved on the upper end of the gate shaft 8 and is locked and fixed by a locking screw. The other end of the connecting rod 7 is inserted into the connecting head 10 and is connected by a pin shaft. One end of the gate shaft 8 located inside the adjustment cavity 3 is sleeved with a cover plate 13 with a skeleton oil seal structure. The cover plate 13 is fixed on the inner wall of one side of the upper end of the adjustment cavity 3. One end of the rocker arm 5 is provided with a connecting sleeve ring 14, and the connecting sleeve ring 14 is sleeved outside one end of the gate shaft 8 and is locked and fixed by a round nut.

[0024] Specifically, when in use, first, the piston rod of the air cylinder 6 expands and contracts. The piston rod drives the connecting rod 7 to swing in amplitude through the connecting head 10. And the amplitude swing of the connecting rod 7 drives the rotation by using the connection between the connecting sleeve 9 and the gate shaft 8. And the rotation of the gate shaft 8 makes one end inside the adjustment cavity 3 drive the rocker arm 5 to swing in amplitude through the connecting sleeve ring 14. The swinging rocker arm 5 drives the two stacked gate plates 4 to move to the position of the adjustment cavity 3 in the middle of the valve body passage 2 of the valve body 1 through the spring 15 by using the spring seat 11, so as to realize the opening and closing of the double gate valve. By rotating the gate shaft 8 to open the two gate plates 4, the driving mode of the gate shaft 8 on the gate plates 4 can be changed. Furthermore, with the change of the driving mode of the gate shaft 8 on the gate plates 4, the ash on the surface of the gate shaft 8 will not be carried out of the valve body 1 due to rotation, and further, the friction between the gate shaft 8 and the sealing structure parts can be reduced, and the problem of sealing can be reduced, and the service life of the double gate valve can be further improved.

[0025] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rotary double-gate valve, characterized in that, Comprising: A valve body (1), a valve body passage (2) is vertically opened at the center of the valve body (1), and an adjustment cavity (3) extending outward from the inner center position of the valve body passage (2) to the front end of the valve body (1) and facilitating the rotation and opening / closing of the valve body gate is provided; A gate (4), there are two gates (4), the two gates (4) are arranged at the upper and lower ends of the adjustment cavity (3), and a rocker arm (5) extending toward the valve body passage (2) is connected by a spring (15) at the middle of the corresponding surfaces of the two gates (4); A cylinder (6), the cylinder (6) is arranged on one side of the upper end face outside the adjustment cavity (3), one end of the piston rod of the cylinder (6) is movably connected with a connecting rod (7), and the other end of the connecting rod (7) is vertically connected with a gate rotating shaft (8) which is hermetically inserted into the inner side of the adjustment cavity (3) through a bearing member and is fixedly connected with one end of the rocker arm (5).

2. The rotary double gate valve according to claim 1, wherein: One end of the connecting rod (7) is connected with a connecting sleeve (9) with a locking screw, and the connecting sleeve (9) is sleeved on the upper end of the gate rotating shaft (8) and is locked and fixed by the locking screw.

3. The rotary double-gate valve according to claim 1, wherein: One end of the piston rod of the cylinder (6) is provided with a connecting head (10) with a pin shaft, and the other end of the connecting rod (7) is inserted into the connecting head (10) and is connected through the pin shaft.

4. A rotary double-gate valve according to claim 1, characterized in that: Spring seats (11) are embedded and installed in the grooves provided at the center positions of the corresponding surfaces of the two gates (4), both ends of the spring (15) are inserted into the inside of the spring seats (11) for fixation, and ceramic rings (12) are embedded and installed on the outer side of the contact surface between the gate (4) and the inner wall of the adjustment cavity (3).

5. The rotary double gate valve according to claim 1, characterized in that: One end of the gate rotating shaft (8) located inside the adjustment cavity (3) is sleeved with a cover plate (13) with a skeleton oil seal structure, and the cover plate (13) is fixed on the inner wall of one side of the upper end of the adjustment cavity (3).

6. The rotary double-gate valve according to claim 1, characterized in that: One end of the rocker arm (5) is provided with a connecting sleeve ring member (14), and the connecting sleeve ring member (14) is sleeved on the outside of one end of the gate rotating shaft (8) and is locked and fixed by a round nut.

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