CN219975413U - Gate valve with good sealing performance - Google Patents

Abstract

The utility model relates to the technical field of gate valves and discloses a gate valve with good sealing performance, which comprises a valve body, wherein one side of the valve body is fixedly connected with a flow inlet pipe, one side of the flow inlet pipe is provided with a fixed groove, the bottom of the interior of the valve body is provided with a circulation pipeline, the interior of the circulation pipeline is movably sleeved with a filter screen, one side of the filter screen is movably connected with a pull rod, the other side of the valve body is fixedly connected with a flow outlet pipe, the top of the valve body is fixedly connected with a sealing seat, the top of the sealing seat is fixedly connected with a packing pressing plate, the middle part of the packing pressing plate is movably sleeved with a valve rod, and the top of the valve rod is fixedly and movably sleeved with a hand wheel; according to the utility model, the filter screen is arranged, so that impurities in the fluid are blocked outside the filter screen, only water molecules are in contact with the gate plate through the filter screen, the gate plate is not worn by the impurities, the service life of the gate plate is prolonged, and the maintenance times of the gate valve are reduced.

Description

A kind of gate valve with good sealing performance

Technical field

The utility model relates to the technical field of gate valves, and more specifically to a gate valve with good sealing performance.

Background technique

The gate valve is a gate that opens and closes. The movement direction of the gate is perpendicular to the direction of the fluid. The gate valve is installed on the pipeline to cut off the fluid in the pipeline and prevent it from flowing. According to the needs of the working conditions or usage requirements, the valve opening is adjusted. Control the flow of fluid in the pipeline so that the fluid flows in one direction without allowing reverse flow or backflow. The gate valve with good sealing can prevent fluid leakage and reduce the waste of resources when in use.

Existing gate valves with good sealing performance will have some problems in actual use, as follows:

First, the fluid flows in from one side of the gate valve and flows out from the other side. The fixation and rise of the gate are controlled to realize the flow of the fluid. Most of the fluid contains impurities. The long-term contact of the gate with impurities causes the surface to be worn, thereby causing The sealing performance of the gate valve is reduced, and it is difficult to replace the gate plate of the existing gate valve after it is worn, which affects the normal transportation of the pipeline.

Second, after the gate plate of the gate valve is raised upward, the fluid in the pipe flows into the auxiliary groove as the gate plate rises. After the gate plate is lowered and closed, there is still fluid remaining in the auxiliary groove, causing a waste of resources. The fluid in the auxiliary tank is in contact with the gate plate for a long time and continues to corrode the gate plate, causing the sealing performance of the gate plate to decrease.

Utility model content

In order to overcome the above-mentioned defects of the prior art, the present invention provides a gate valve with good sealing performance to solve the problems existing in the above-mentioned background art.

The utility model provides the following technical solution: a gate valve with good sealing performance, including a valve body, an inlet pipe is fixedly connected to one side of the valve body, and a fixed groove is provided on one side of the inlet pipe. There is a circulation pipeline at the bottom inside the body, and a filter mesh is movable inside the circulation pipeline. A pull rod is movably connected to one side of the filter mesh, and an outlet pipe is fixedly connected to the other side of the valve body. , the top of the valve body is fixedly connected to a sealing seat, the top of the sealing seat is fixedly connected to a packing pressure plate, the middle part of the packing pressure plate is movablely connected to a valve stem, and the top of the valve stem is movablely connected to a hand wheel, the bottom of the valve stem is fixedly connected with a gate plate, the top of the gate plate is fixedly connected with a moving plate, the top of the moving plate is fixedly connected with a sealing ring, and the front and back of the middle part of the circulation pipeline are both A moving groove is provided, and an auxiliary groove is provided in the upper half of the interior of the valve body.

Further, the diameter of the fixed groove is the same as the diameter of the periphery of one side of the filter screen, the diameter of the periphery of the right part of the filter screen is the same as the diameter of the circulation pipeline, the filter screen can only pass water molecules, and the pull rod is located within the fixed slot.

Furthermore, the gate plate and the moving plate are both made of carbon steel and are wrapped with rubber on the outside.

Furthermore, the size of the periphery of the sealing ring is the same as the size of the plane of the auxiliary groove, the joint between the sealing ring and the auxiliary groove is in a sealed state, and the sealing ring is made of rubber.

Furthermore, the size of the moving groove is opened for the moving plate to pass through. The area of the top plane of the moving groove is 2 square meters smaller than the area of the bottom plane of the auxiliary groove. The part between the auxiliary groove and the circulation pipeline is in contact with the gate plate. Surface fit.

Furthermore, the height of the auxiliary groove is two centimeters greater than the overall height of the gate plate and the moving plate.

Further, when the bottom of the gate plate is in contact with the bottom of the circulation pipeline, the bottom of the sealing ring is in contact with the bottom of the auxiliary groove.

Technical effects and advantages of this utility model:

1. This utility model is provided with a filter screen to block impurities in the fluid outside the filter screen. Only water molecules contact the gate plate through the filter screen. The gate plate is not worn by impurities, which is beneficial to increasing the service life of the gate plate. , Reduce the number of gate valve maintenance times.

2. When the filter screen of the present utility model needs to be replaced, turn the pull rod and pull the pull rod outward to take the filter screen out of the gate valve, making it more convenient to replace the filter screen.

3. This utility model fixes the rubber ring on the moving plate to form a sealed space in the auxiliary groove above the rubber ring. As the gate moves downward, the sealing ring causes the fluid in the auxiliary groove to be squeezed into the circulation pipeline. within, reducing the waste of resources and at the same time helping to protect the gate.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Figure 2 is a schematic side structural view of the utility model.

Figure 3 is a schematic structural diagram of the filter screen of the present utility model.

Figure 4 is a schematic diagram of the gate structure of the present utility model.

Figure 5 is a schematic diagram of the gate rising structure of the present utility model.

The reference numbers are: 1. Valve body; 101. Circulation pipeline; 102. Auxiliary tank; 103. Moving tank; 2. Inlet pipe; 201. Fixed tank; 3. Outlet pipe; 4. Filter; 401. Tie rod; 5. Sealing seat; 6. Packing pressure plate; 7. Valve stem; 8. Hand wheel; 9. Gate plate; 901. Moving plate; 902. Sealing ring.

Detailed ways

The technical solutions in the present utility model will be described clearly and completely below with reference to the accompanying drawings in the present utility model. In addition, the forms of each structure described in the following embodiments are only illustrations. The gate valve with good sealing performance is not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present utility model. .

Referring to Figures 1-5, the utility model provides a gate valve with good sealing performance, including a valve body 1. One side of the valve body 1 is fixedly connected to an inlet pipe 2, and one side of the inlet pipe 2 is provided with a fixing groove 201. , a circulation pipeline 101 is provided at the bottom inside the valve body 1, a filter 4 is movably connected to the interior of the circulation pipeline 101, a pull rod 401 is movably connected to one side of the filter 4, and a tie rod 401 is movably connected to the other side of the valve body 1. Outlet pipe 3, the top of the valve body 1 is fixedly connected with the sealing seat 5, the top of the sealing seat 5 is fixedly connected with the packing pressure plate 6, the middle part of the packing pressure plate 6 is movablely connected with the valve stem 7, and the top of the valve stem 7 is fixedly connected with the movable sleeve The hand wheel 8 is connected, the bottom of the valve stem 7 is fixedly connected to the gate plate 9, the top of the gate plate 9 is fixedly connected to the moving plate 901, the top of the moving plate 901 is fixedly connected to the sealing ring 902, and the front of the middle part of the circulation pipeline 101 There are moving grooves 103 on the back and the back, and an auxiliary groove 102 is provided on the upper part of the valve body 1. The opening and closing part of the gate valve is the gate plate 9. The movement direction of the gate plate 9 is perpendicular to the direction of the fluid. The gate valve can only be fully operated. Open and fully closed, adjustment and throttling cannot be performed. The gate 9 has two sealing surfaces. When the gate valve is closed, the gate 9 is forced to the valve seat by external force to ensure the sealing performance of the sealing surface.

In a preferred embodiment, the diameter of the fixed groove 201 is the same as the diameter of one side of the filter screen 4, the diameter of the right part of the filter screen 4 is the same as the diameter of the circulation pipe 101, and a small part of the filter screen 4 is located on the fixed It is fixed in the groove 201, and the rest is located in the circulation pipe 101. The filter 4 can only pass water molecules, and the impurities in the fluid are blocked by the filter 4. The pull rod 401 is located within the range of the fixed groove 201, and the pull rod 401 will not block the incoming flow. The connection of tube 2 creates an obstruction.

In a preferred embodiment, the gate plate 9 and the moving plate 901 are both made of carbon steel and are wrapped with rubber. The carbon steel gate plate 9 is harder and has a longer service life. At the same time, the rubber is conducive to improving the sealing of the gate valve. sex.

In a preferred embodiment, the size of the periphery of the sealing ring 902 is the same as the size of the plane of the auxiliary groove 102, and the joint between the sealing ring 902 and the auxiliary groove 102 is in a sealed state. The sealing ring 902 is made of rubber material, and the sealing ring 902 is in contact with the movement of the rubber material. The combination of the plates 901 creates a sealed space above the sealing ring 902 in the auxiliary groove 102, preventing fluid from passing through the sealing ring 902 and flowing into the auxiliary groove 102.

In a preferred embodiment, the moving groove 103 is large enough for the moving plate 901 to pass through. The moving plate 901 moves in the moving groove 103 to reduce the wear of the gate 9. The area of the top plane of the moving groove 103 is larger than the bottom plane of the auxiliary groove 102. The area is 2 square meters smaller. When the gate 9 moves into the auxiliary groove 102, the friction force on the gate 9 is reduced. The part between the auxiliary groove 102 and the circulation pipe 101 is in contact with the surface of the gate 9, limiting the gate. The range of movement of plate 9.

In a preferred embodiment, the height of the auxiliary groove 102 is two centimeters greater than the overall height of the gate 9 and the moving plate 901. When the valve stem 7 drives the gate 9 to move into the auxiliary groove 102, the height of the auxiliary groove 102 is The gate 9 is located above the range where the circulation pipeline 101 is located, so that the fluid flow range is increased.

In a preferred embodiment, when the bottom of the gate plate 9 is in contact with the bottom of the circulation pipeline 101, the bottom of the sealing ring 902 is in contact with the bottom of the auxiliary groove 102, so that the height of the moving plate 901 is determined to penetrate the circulation pipeline 101 and In the auxiliary tank 102, when the gate 9 separates the circulation pipeline 101, the sealing ring 902 prevents fluid from remaining in the auxiliary tank 102.

The working principle of the utility model: connect the gate valve to the pipeline, the inlet pipe 2 is connected to the inlet, the outlet pipe 3 is connected to the outlet, when the fluid does not need to flow, the gate 9 is fixed inside the circulation pipe 101 , divide the circulation pipeline 101 into two parts. When fluid flow is required, turn the handwheel 8 so that the valve stem 7 rises with the rotation of the handwheel 8, thereby driving the gate 9 to rise, making the circulation pipeline 101 become a connected As a whole, the fluid flows from the inlet pipe 2 through the circulation pipe 101 and flows out from the outlet pipe 3. Before the fluid flows into the circulation pipe 101, it is filtered by the filter screen 4, so that the impurities in the fluid are blocked by the filter screen 4. As the The gate 9 moves upward, and the fluid passing through the circulation pipe 101 enters the auxiliary groove 102 along the gap between the auxiliary groove 102 and the gate 9;

When it is necessary to intercept the fluid so that it no longer flows, turn the handwheel 8 in the opposite direction so that the valve stem 7 drives the gate plate 9 to move downward. The moving plate 901 moves along with the gate plate 9 in the moving groove 103. Since the moving plate 901 There is a sealing ring 902 fixedly connected to the top of the gate. When the gate plate 9 moves downward, it drives the sealing ring 902 to move downward. The sealing ring 902 is connected with the auxiliary groove 102 to form a sealing state. Therefore, when the sealing ring 902 moves downward with the moving plate 901, The fluid inside the auxiliary tank 102 is squeezed downward. When the bottom of the sealing ring 902 fits the bottom of the auxiliary tank 102, the fluid inside the auxiliary tank 102 is completely squeezed into the circulation pipe 101 by the sealing ring 902. At the same time, the gate The bottom of the plate 9 fits the bottom of the circulation pipe 101, dividing the circulation pipe 101 into two spaces to stop the flow of fluid;

When the filter screen 4 has been used for a long time and has more impurities adhered to its surface, separate the inlet pipe 2 from the inlet, turn the pull rod 401 and pull it out, thereby taking the filter screen 4 out of the circulation pipe 101. After cleaning the adhering impurities on the filter screen 4, put it into the circulation pipeline 101 again, and continue to transport the fluid.

Claims (7)

1. A gate valve with good sealing performance, including a valve body (1), characterized in that: an inlet pipe (2) is fixedly connected to one side of the valve body (1), and the inlet pipe (2) A fixed groove (201) is provided on one side, a circulation pipeline (101) is provided at the bottom inside the valve body (1), and a filter screen (4) is movably connected inside the circulation pipeline (101). One side of the filter (4) is movably connected to a pull rod (401), the other side of the valve body (1) is fixedly connected to an outlet pipe (3), and the top of the valve body (1) is fixedly connected to Sealing seat (5), the top of the sealing seat (5) is fixedly connected with a packing pressure plate (6), the middle part of the packing pressure plate (6) is movably connected with a valve stem (7), the valve stem (7) The top of the valve stem (7) is fixedly connected with a handwheel (8), the bottom of the valve stem (7) is fixedly connected with a gate plate (9), and the top of the gate plate (9) is fixedly connected with a moving plate (901), so A sealing ring (902) is fixedly connected to the top of the moving plate (901), moving grooves (103) are provided on the front and back of the middle part of the circulation pipe (101), and the upper part of the valve body (1) is An auxiliary groove (102) is provided in the half part. 2. A gate valve with good sealing performance according to claim 1, characterized in that: the diameter of the fixed groove (201) is the same as the diameter of one side of the filter screen (4), and the filter screen (4) The diameter of the right part periphery is the same as the diameter of the circulation pipe (101), the filter (4) can only pass water molecules, and the tie rod (401) is located within the range of the fixed groove (201). 3. A gate valve with good sealing performance according to claim 1, characterized in that: the gate plate (9) and the moving plate (901) are both made of carbon steel and are wrapped with rubber on the outside. 4. A gate valve with good sealing performance according to claim 1, characterized in that: the size of the periphery of the sealing ring (902) is the same as the size of the plane of the auxiliary groove (102), and the sealing ring (902) is The fitting part of the auxiliary groove (102) is in a sealed state, and the sealing ring (902) is made of rubber. 5. A gate valve with good sealing performance according to claim 1, characterized in that: the moving groove (103) is opened to a size for the moving plate (901) to pass through, and the area of the top plane of the moving groove (103) is It is 2 square meters smaller than the area of the bottom plane of the auxiliary groove (102), and the part between the auxiliary groove (102) and the circulation pipe (101) is in contact with the surface of the gate plate (9). 6. A gate valve with good sealing performance according to claim 1, characterized in that the height of the auxiliary groove (102) is two centimeters greater than the overall height of the gate plate (9) and the moving plate (901). 7. A gate valve with good sealing performance according to claim 1, characterized in that when the bottom of the gate plate (9) and the bottom of the circulation pipeline (101) fit together, the bottom of the sealing ring (902) Fit with the bottom of the auxiliary groove (102).