Tooth slide valve

Abstract

The utility model relates to the technical field of valves, in particular to a tooth slide valve which comprises a valve body and a valve cover at the top of the valve body. Butt-joint flange pipes are arranged on the two sides of the valve body, a passage gap is reserved in the valve body between inner end passage openings of the butt-joint flange pipes on the two sides, and the gas source cut-off valve is characterized in that a guide plate is arranged on the inner side of the valve body, and the guide plate is vertically and slidably provided with a gas source cut-off plate which is matched with the passage gap and used for blocking the inner end passage openings of the butt-joint flange pipes on the two sides; the lower portion of the guide plate is slidably provided with a transversely-arranged auxiliary breaking plate and further provided with a fixed clamping plate matched with the auxiliary breaking plate. The auxiliary breaking plate is used for sealing an air channel between the guide plate and the fixed clamping plate and dividing the valve body into an upper cavity and a lower cavity; a first transmission mechanism and a second transmission mechanism are further arranged. The size of the tooth slide valve is smaller than that of the ball valve and the gate valve; the valve body can be sealed into the upper cavity and the lower cavity through structural cooperation of the auxiliary cut-off plate, the guide plate and the fixed clamping plate, the gas source cut-off plate can be conveniently taken out to be replaced, meanwhile, gas conveying can be continued through the lower cavity, and gas stopping is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a gear sliding valve. Background Art

[0002] In the municipal gas pipeline system, there are many types of valves used to control the on and off of the gas source, among which ball valves and gate valves are the two most common types of valves. The ball valve is mainly composed of a ball, a valve stem and a valve seat. The ball is the core component of the ball valve, which has a channel inside and can be rotated 90 degrees to open or close the fluid channel. The gate valve is mainly composed of a valve body, a gate, a valve stem and a drive device. The gate slides up and down in the valve body to control the on and off of the fluid.

[0003] In some main pipelines for transporting gas, large-diameter pipelines such as DN300, DN400, and DN500 are generally used to meet the total demand for urban gas. When used in large-diameter pipelines, ball valves need to accommodate larger balls and matching valve stems and valve seats. The increase in size leads to an increase in the volume of the entire valve. The size and strength of the gate plate need to match the pipeline diameter and fluid pressure. In addition, in order to ensure good sealing performance, the valve body structure of the gate valve is also more complicated, which further increases its volume. Whether it is a ball valve or a gate valve, the increase in volume and weight will lead to difficulties in installation, replacement and maintenance.

[0004] In addition, due to the large size of ball valves and gate valves, only one valve can be installed in each valve well (usually 1.2m*0.8m). When disassembling the valve body and replacing the internal ball or valve plate, it is necessary to shut down the valves in the valve wells on both sides of the valve on the main pipeline, or when there is a leak in the pipeline, it is necessary to close the valves at both ends of the leaking pipeline. Similarly, users in the middle section face the problem of gas outage. If there is internal leakage in the valves on both sides, the valves at the upper level must be shut down, and the gas outage area will be further expanded.

[0005] Therefore, it is necessary to design a valve with a simple structure, which is convenient to disassemble and replace and does not affect the gas supply during maintenance. Utility Model Content

[0006] In order to solve the problems that the ball valves and gate valves used in the gas pipeline in the prior art are large in size, the internal valve cores are inconvenient to be replaced and repaired, and the gas needs to be stopped during replacement, the utility model provides a gear sliding valve, which has the characteristics of small size, easy installation, no need to stop the gas during replacement and maintenance, and no need to stop the upper valve to expand the gas stop area when the valve cannot be closed during pipeline leakage rescue.

[0007] A gear sliding valve comprises a valve body and a valve cover on the top of the valve body; docking flange tubes are provided on both sides of the valve body, and a passage gap is left in the valve body between the inner end channel openings of the docking flange tubes on both sides, and it is characterized in that a guide plate is provided on the inner side of the valve body, and the guide plate is vertically slidably provided with an air source cut-off plate that cooperates with the passage gap and is used to block the inner end channel openings of the docking flange tubes on both sides; a transversely arranged auxiliary breaking plate is slidably provided at the lower part of the guide plate, and a fixed clamping plate that cooperates with the auxiliary breaking plate is also provided on the inner wall of the valve body on the side opposite to the guide plate; the auxiliary breaking plate is used to close the airway between the guide plate and the fixed clamping plate, and divides the valve body into an upper chamber and a lower chamber; a first transmission mechanism that cooperates with the air source cut-off plate and a second transmission mechanism that cooperates with the auxiliary breaking plate are also provided.

[0008] Furthermore, the first transmission mechanism includes a rack arranged longitudinally of the air source cut-off plate and a first gear corresponding to and meshing with the rack inside the valve body; the rotating shaft of the first gear is rotationally connected to the valve body dynamic seal and extends out of the valve body.

[0009] Furthermore, two sets of first gears are provided, and are respectively arranged in the upper cavity and the lower cavity.

[0010] Furthermore, the second transmission mechanism includes a tooth groove at the bottom of the auxiliary breaking plate and a second gear inside the valve body corresponding to and meshing with the tooth groove. The rotating shaft of the second gear is rotationally connected to the dynamic seal of the valve body and extends out of the valve body.

[0011] Furthermore, the upper cavity of the valve body is connected with a venting nozzle.

[0012] Furthermore, the inner end passage openings of the butt flange pipes on both sides are provided with an inclination angle, and the bottom of the gas source cut-off plate is a wedge shape corresponding to the inclination angle.

[0013] Furthermore, sealing gaskets are installed on both sides of the gas source cut-off plate.

[0014] The beneficial effects of the utility model are as follows: 1. The volume of the gear slide valve is smaller than that of the ball valve and the gate valve, and it is easy to disassemble and assemble; 2. Through the structural cooperation of the auxiliary breaking plate, the guide plate, and the fixed clamping plate, the valve body can be closed into the upper and lower chambers, which is convenient for taking out the gas source cutting plate for maintenance and replacement, and there is no need to dismantle the entirety. At the same time, the lower chamber can continue to transport gas without stopping the gas. In addition, when the valve cannot be closed during pipeline leakage rescue, the gas stop area can be expanded without stopping the upper valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is a schematic diagram of the overall structure of the gear slide valve of the utility model;

[0016] Attached Figure 2 The schematic diagram of the structure of the passage opening of the tooth slide valve of the utility model

[0017] Attached Figure 3 for Figure 2 Schematic diagram of the internal structure;

[0018] Attached Figure 4 for Figure 2 Schematic diagram of the three-dimensional structure;

[0019] Attached Figure 5 The schematic diagram of the structure of the passage closing of the tooth slide valve of the utility model

[0020] Attached Figure 6 for Figure 5 Schematic diagram of the internal structure;

[0021] Attached Figure 7 for Figure 5 Schematic diagram of the three-dimensional structure;

[0022] In the figure: 1. valve body; 2. valve cover; 3. docking flange pipe; 4. passage gap; 5. guide plate; 6. air source cut-off plate; 7. auxiliary cut-off plate; 8. first gear; 9. rack; 10. second gear; 11. fixed clamping plate; 12. rotating shaft; 13. sealing gasket; 14. vent nozzle; 15. tooth groove. DETAILED DESCRIPTION

[0023] The tooth slide valve of the utility model is further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 7 As shown, a gear sliding valve comprises a valve body 1 and a valve cover 2 on the top of the valve body 1; docking flange tubes 3 are provided on both sides of the valve body 1, and a passage gap 4 is left in the valve body 1 between the inner end channel openings of the docking flange tubes 3 on both sides, and the characteristic is that a guide plate 5 is provided on the inner side of the valve body 1, and the guide plate 5 is vertically slidably provided with an air source cut-off plate 6 that cooperates with the passage gap 4 and is used to block the inner end channel openings of the docking flange tubes 3 on both sides; a transversely arranged auxiliary breaking plate 7 is slidably provided at the lower part of the guide plate 5, and a fixed clamping plate 11 that cooperates with the auxiliary breaking plate 7 is also provided on the inner wall of the valve body 1 on the opposite side of the guide plate 5; the auxiliary breaking plate 7 is used to close the airway between the guide plate 5 and the fixed clamping plate 11, and divides the valve body 1 into an upper chamber and a lower chamber; a first transmission mechanism that cooperates with the air source cut-off plate 6 and a second transmission mechanism that cooperates with the auxiliary breaking plate 7 are also provided.

[0025] A sealing gasket 13 is installed on the ground of the valve cover 2 and is connected to the valve body 1 by bolts. The butt flange pipes 3 on both sides are used to communicate with the gas pipeline.

[0026] Driven by the first transmission mechanism, when the gas source cut-off plate 6 rises to the top of the fixed clamping plate 11, the second transmission mechanism drives the auxiliary cut-off plate 7 to move along the bottom of the guide plate 5 toward the fixed clamping plate 11, so that the auxiliary cut-off plate 7 is stuck in the fixed clamping plate 11, so as to realize the division of the inner cavity of the first valve body 1 into a closed upper cavity and a lower cavity. Both ends of the guide plate 5 and the fixed clamping plate 11 are connected to the inner walls of the valve cover on both sides. The fixed clamping plate 11 is two transversely fixed plates. The inner walls of the two plates and the side of the valve cover between the ends of the two plates are equipped with sealing gaskets 13, so as to achieve a sealing effect when the auxiliary cut-off plate 7 enters, or the sealing gasket 13 is arranged on the auxiliary cut-off plate 7 to achieve the same effect, wherein the sealing gasket 13 can also be wedge-shaped. At this time, after the residual gas in the upper cavity is emptied, the valve cover 2 can be opened, and the first gear 8 located in the upper cavity is continuously driven to remove the gas source cut-off plate 6 from the first valve body 1, so as to complete the replacement or maintenance of the gas source cut-off plate 6. Put the gas source cut-off plate 6 back into the upper chamber, install the valve cover 2, and then reset the auxiliary cut-off plate 7. At the same time, the gas source cut-off plate 6 rises, and the auxiliary cut-off plate 7 closes the upper chamber and the lower chamber. When the gas source cut-off plate 6 on the upper chamber is taken out for maintenance or replacement, the lower chamber can also pass the gas. The original ball valve, gate valve and other larger valves can also be replaced in the valve well. In this way, even if there is a pipeline leak and the valve has an internal leak and cannot shut off the gas source, another gear slide valve can be closed at the valve well to cut off the gas source, thereby achieving the purpose of not shutting down the upper valve and not expanding the gas outage area. When repairing the pipeline leak, the users of the upper valve can still use gas normally.

[0027] When the gas passage needs to be closed, the gas source cut-off plate 6 is lowered by the first transmission mechanism and inserted into the passage gap 4 in the valve body 1 between the inner end channel openings of the docking flange pipes 3 on both sides. Sealing gaskets 13 are installed on both sides of the gas source cut-off plate 6 to improve the sealing effect between the inner end channel openings of the docking flange pipes 315.

[0028] In the prior art, the ball valve and the gate valve commonly used on the gas pipeline are relatively large in size, and the pipeline connecting the ball valve and the gate valve with the filter inlet pipe or outlet pipe on the gas pipeline is relatively deep. The valve body 1 in the present application is smaller and thinner than the ball valve and the gate valve body 1, and the pipeline connecting with the filter is relatively short, so it can also reduce the dust accumulated in the gas pipeline from entering the pipeline depth. The first transmission mechanism and the second transmission mechanism can be the screw mechanism commonly used on the orifice valve.

[0029] Preferably, in this embodiment, the first transmission mechanism includes a rack 9 longitudinally arranged on the air source cut-off plate 6 and a first gear 8 inside the valve body 1 corresponding to and meshing with the rack 9; the rotating shaft 12 of the first gear 8 is rotatably connected to the valve body 1 in a dynamic seal and extends out of the valve body 1.

[0030] The racks 9 are located on both sides of the air source cut-off plate 6, and the corresponding first gear 8 includes its axle and two gears fixed on the axle. There are two groups of first gears 8, which are respectively arranged in the upper cavity and the lower cavity. In order to improve the stability of the air source cut-off plate 6 when it rises or falls, one group of first gears 8 is arranged in the upper cavity and the lower cavity. The two groups of first gears 8 are used to alternately drive the air source cut-off plate 6 when the air source cut-off plate 6 moves up and down.

[0031] Preferably, the second transmission mechanism includes a tooth groove 15 located at the bottom of the auxiliary breaking plate 7 and a second gear 10 inside the valve body 1 corresponding to and meshing with the tooth groove 15. The rotating shaft 12 of the second gear 10 is connected to the valve body 1 in a dynamic seal and extends out of the valve body 1.

[0032] like Figures 2 to 7 As shown, two explosion-proof motors are respectively connected to the axles of the first gear 8 and the second gear 10 outside the valve body 1; or the first gear 8 and the second gear 10 are manually screwed to drive the first gear 8 to rotate, so as to drive the gas source cut-off plate 6 to rise or fall. Sealing gaskets 13 are installed on both sides of the gas source cut-off plate 6. After the gas source cut-off plate 6 falls into the passage gap 4 of the inner end passage openings of the butt flange pipes 3 on both sides in the valve cover, the sealing gaskets 13 match and align with the positions of the inner end passage openings of the butt flange pipes 3 on both sides and close the inner end passage openings of the butt flange pipes 3 on both sides, thereby closing the gas passage. On the contrary, when the gas source cut-off plate 6 rises, the gas passage is opened.

[0033] Better, such as Figure 2 , Figure 5 As shown, the upper cavity of the valve body 1 is connected with a vent nozzle 14, which is used to vent the residual gas in the upper cavity before opening the valve cover 2. The model of the vent nozzle is but not limited to the Q947N-400LB-12 industrial valve.

[0034] Preferably, the inner end channel openings of the butt flange tubes 3 on both sides are provided with an inclination angle, and the bottom of the air source cut-off plate 6 is wedge-shaped corresponding to the inclination angle, so that the air source cut-off plate 6 can be better inserted into the gap between the inner end channel openings of the butt flange tubes 3 on both sides to improve the sealing effect.

Claims

1. A toothed sliding valve, comprising a valve body (1) and a valve cover (2) on the top of the valve body (1); a butt flange pipe (3) is provided on both sides of the valve body (1), and a passage gap (4) is left in the valve body (1) between the inner end passage openings of the butt flange pipes (3) on both sides, characterized in that: A guide plate (5) is provided on the inner side of the valve body (1), and the guide plate (5) is provided with a gas source cut-off plate (6) which is matched with the passage gap (4) and is used to block the inner end passage openings of the flange pipes (3) on both sides. A sub-cut-off plate (7) is provided on the lower part of the guide plate (5) and is provided in a transverse manner. A fixed clamping plate (11) which is matched with the sub-cut-off plate (7) is also provided on the inner wall of the valve body (1) on the side opposite to the guide plate (5). The sub-cut-off plate (7) is used to close the air passage between the guide plate (5) and the fixed clamping plate (11), so as to divide the valve body (1) into an upper chamber and a lower chamber. A first transmission mechanism which is matched with the gas source cut-off plate (6) and a second transmission mechanism which is matched with the sub-cut-off plate (7) are also provided.

2. The gear slide valve according to claim 1, characterized in that: The first transmission mechanism comprises a rack (9) arranged longitudinally of the air source cut-off plate (6) and a first gear (8) inside the valve body (1) corresponding to and meshing with the rack (9); a rotating shaft (12) of the first gear (8) is rotatably connected to the valve body (1) in a dynamic seal and extends out of the valve body (1).

3. The gear slide valve according to claim 2, characterized in that: The first gears (8) are provided in two groups and are respectively arranged in the upper cavity and the lower cavity.

4. The gear slide valve according to any one of claims 1 to 3, characterized in that: The second transmission mechanism comprises a tooth groove (15) located at the bottom of the auxiliary breaking plate (7) and a second gear (10) inside the valve body (1) corresponding to and meshing with the tooth groove (15); a rotating shaft (12) of the second gear (10) is rotatably connected to the valve body (1) in a dynamic seal and extends out of the valve body (1).

5. The gear slide valve according to any one of claims 1 to 3, characterized in that: The upper cavity of the valve body (1) is connected to a venting nozzle (14).

6. The gear slide valve according to claim 4, characterized in that: The upper cavity of the valve body (1) is connected to a venting nozzle (14).

7. The toothed slide valve according to claim 1, 2, 3 or 6, characterized in that: The inner end passage openings of the butt flange pipes (3) on both sides are both provided with an inclination angle, and the bottom of the gas source cut-off plate (6) is a wedge shape corresponding to the inclination angle.

8. The gear slide valve according to claim 4, characterized in that: The inner end passage openings of the butt flange pipes (3) on both sides are both provided with an inclination angle, and the bottom of the gas source cut-off plate (6) is a wedge shape corresponding to the inclination angle.

9. The gear slide valve according to claim 5, characterized in that: The inner end passage openings of the butt flange pipes (3) on both sides are both provided with an inclination angle, and the bottom of the gas source cut-off plate (6) is a wedge shape corresponding to the inclination angle.

10. The toothed slide valve according to claim 1, 2, 3, 6, 8 or 9, characterized in that: Sealing pads (13) are installed on both sides of the gas source cut-off plate (6).

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