Stop valve

Abstract

The utility model provides a stop valve, and belongs to the technical field of stop valves. The problems that in the prior art, a valve clack is unstable in installation and poor in flow guiding effect are solved. The valve comprises a valve body, a valve clack body, a sealing cover and a valve rod, the outer portion of the valve body is in a symmetrical oval shape, an inlet flange and an outlet flange are formed on the two sides of the valve body respectively, a connecting flange is formed at the upper end of the valve body, a flow guide body is formed in the valve body, and a through installation circulation hole is formed in the middle of the flow guide body. An upper partition arm and a lower partition arm are formed at the upper and lower diagonal angles of the flow guide body respectively, an upper flow guide channel and a lower flow guide channel are formed between the upper partition arm and the valve cavity and between the lower partition arm and the valve cavity respectively, the sealing cover is fixedly connected with the connecting flange, the valve clack body is fixedly connected with the end of the valve rod, the valve rod penetrates through the sealing cover, and the valve clack body is installed in the installation circulation hole. And a wear-resistant bushing is fixedly sleeved outside the valve clack body. The flow guide device has the advantages of stable structure and good flow guide effect.

Description

Technical Field

[0001] This utility model belongs to the field of gate valve technology and relates to a gate valve. Background Technology

[0002] Gate valves are a type of forced-seal valve widely used in industrial pipeline systems. They control the flow of fluid by moving the valve disc up and down, and are characterized by simple structure, reliable sealing, and excellent regulating performance.

[0003] Chinese patent publication number CN218644894U discloses a shut-off valve, including a mounting body with a flow channel, a valve stem mounted on the mounting body, a valve disc connected to the valve stem and located in the mounting body, and an actuator connected to the valve stem. The flow channel has two ends, and the two ends of the flow channel are respectively connected to a first pair of connecting pipes and a second pair of connecting pipes. The first pair of connecting pipes and the second pair of connecting pipes are both sealed and fixed to the mounting body. The first pair of connecting pipes is provided with a first docking structure, and the second pair of connecting pipes is provided with a second docking structure.

[0004] In the shut-off valve provided by this patent, the mounting body does not have a dedicated structure for placing the valve disc, which can easily lead to problems such as unstable valve disc structure or insufficient sealing. In addition, the flow channel near the valve disc has a large bend angle, which has a certain impact on efficiency. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing a shut-off valve.

[0006] The objective of this utility model can be achieved through the following technical solution: A stop valve includes a valve body, a valve disc, a sealing cover, and a valve stem. The valve body is symmetrically elliptical in shape, and an inlet flange and an outlet flange are formed on both sides of the valve body. A connecting flange is formed at the upper end of the valve body. A valve cavity is formed inside the valve body and is connected to the inlet flange, the outlet flange, and the connecting flange. A guide fluid is formed inside the valve body. The middle part of the guide fluid is rectangular and has a through installation flow hole. An upper partition arm and a lower partition arm are formed diagonally at the upper and lower ends of the guide fluid. The upper partition arm and the lower partition arm are fixed to the inner walls of the upper and lower ends of the valve body, respectively. An upper flow channel and a lower flow channel are formed between the upper partition arm, the lower partition arm, and the valve cavity, respectively. The sealing cover is fixedly connected to the connecting flange. The valve disc is fixedly connected to the end of the valve stem, and the valve stem passes through the sealing cover. The valve disc is installed in the installation flow hole. A wear-resistant bushing is fixedly fitted on the outside of the valve disc.

[0007] In one of the above-mentioned gate valves, a sealing groove is provided in the sealing cover, a sealing packing is installed in the sealing groove, a packing gland is fixedly installed at the upper end of the sealing packing, and the sealing packing and the packing gland are sleeved on the outside of the valve stem and connected to the valve stem.

[0008] In one of the aforementioned shut-off valves, a conical sealing block is formed at the lower end of the sealing cover.

[0009] In the aforementioned shut-off valve, the inclination angle of the upper and lower isolation arms is 55°, and the ends of the upper and lower isolation arms form an upper guide angle and a lower guide angle with the valve cavity, respectively.

[0010] In one of the aforementioned shut-off valves, the lower end of the valve disc body has an arc-shaped concave structure.

[0011] In one of the aforementioned gate valves, the upper end of the valve stem has a threaded structure and a handwheel is installed on the upper end of the valve stem.

[0012] Compared with the prior art, the gate valve provided by this utility model has the following beneficial effects: 1. The rectangular mounting flow hole inside the valve body provides precise axial positioning for the valve disc, ensuring no radial offset during opening and closing. Combined with the wear-resistant bushing, it reduces wear on the sealing surface and lowers the maintenance frequency; 2. The 55° tilt angle of the upper and lower partition arms and the guide angle form a symmetrical flow channel, reducing the flow resistance coefficient, increasing the flow coefficient, reducing the resistance to transporting high-viscosity media, and reducing energy consumption. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the valve body.

[0016] In the diagram: 1. Valve body; 11. Inlet flange; 12. Outlet flange; 13. Connecting flange; 14. Flow guide; 141. Mounting flow hole; 142. Upper partition arm; 143. Lower partition arm; 144. Upper flow guide channel; 145. Lower flow guide channel; 146. Upper flow guide angle; 147. Lower flow guide angle; 2. Valve disc body; 21. Arc-shaped concave structure; 3. Sealing cover; 31. Sealing groove; 32. Conical sealing block; 4. Valve stem; 41. Threaded structure; 5. Wear-resistant bushing; 6. Sealing packing; 7. Packing gland; 8. Handwheel. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] like Figures 1 to 3As shown, this embodiment includes a valve body 1, a valve disc body 2, a sealing cover 3, and a valve stem 4. The valve body 1 has a symmetrical elliptical shape on the outside, and an inlet flange 11 and an outlet flange 12 are formed on both sides of the valve body 1, respectively. A connecting flange 13 is formed at the upper end of the valve body 1. A valve cavity is formed inside the valve body 1, and the valve cavity is connected to the inlet flange 11, the outlet flange 12, and the connecting flange 13. A guide fluid 14 is formed inside the valve body 1. The middle part of the guide fluid 14 is rectangular, and a through-hole is formed in the middle of the guide fluid 14. The flow passage 141 is installed, and the upper and lower obliquely diagonally formed by the guide fluid 14 are respectively formed by the upper and lower partition arms 142 and the lower partition arms 143. The upper partition arms 142 and the lower partition arms 143 are respectively fixed to the inner walls of the upper and lower ends of the valve body 1. The upper guide channel 144 and the lower guide channel 145 are respectively formed between the upper partition arms 142, the lower partition arms 143 and the valve cavity. The upper guide channel 144 and the lower guide channel 145 are respectively connected to the valve cavity at the port of the inlet flange 11 and the outlet flange 12.

[0019] Specifically, such as Figure 3 As shown, the inclination angle of the upper partition arm 142 and the lower partition arm 143 is 55°. The ends of the upper partition arm 142 and the lower partition arm 143 form an upper guide angle 146 and a lower guide angle 147 near the inlet flange 11 and the outlet flange 12 of the valve cavity, respectively. Both the upper guide angle 146 and the lower guide angle 147 are obtuse angles to avoid fluid disturbance and improve the guiding efficiency.

[0020] like Figures 1 to 3 As shown, the sealing cover 3 is fixedly connected to the connecting flange 13, the valve disc body 2 is fixedly connected to the end of the valve stem 4 and the valve stem 4 passes through the sealing cover 3, the valve disc body 2 is installed in the installation flow hole 141, a wear-resistant bushing 5 is fixedly fitted on the outside of the valve disc body 2, the wear-resistant bushing 5 is installed in the valve disc body 2 and the installation flow hole 141, a sealing groove 31 is opened in the sealing cover 3, a sealing packing 6 is installed in the sealing groove 31, a packing gland 7 is fixedly installed on the upper end of the sealing packing 6, the sealing packing 6 and the packing gland 7 are fitted on the outside of the valve stem 4 and connected to the valve stem 4, a threaded structure 41 is formed on the upper end of the valve stem 4 and the handwheel 8 is installed in the threaded structure 41 on the upper end of the valve stem 4.

[0021] To elaborate further, such as Figure 2 As shown, the lower end of the valve disc body 2 has an arc-shaped concave structure 21. The arc-shaped concave structure 21 reduces the fluid turning angle, and the arc-shaped concave structure 21 has no sharp corners to avoid particle jamming, thus improving the anti-clogging effect.

[0022] To elaborate further, such as Figure 2 As shown, a conical sealing block 32 is formed at the lower end of the sealing cover 3, and the conical sealing block 32 further improves the sealing performance between the sealing cover 3 and the valve body 1.

[0023] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0024] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A stop valve, comprising a valve body (1), a valve disc body (2), a sealing cap (3), and a valve stem (4), wherein the valve body (1) is externally symmetrically elliptical and an inlet flange (11) and an outlet flange (12) are formed on both sides of the valve body (1), a connecting flange (13) is formed at the upper end of the valve body (1), and a valve cavity is provided inside the valve body (1) and the valve cavity is connected to the inlet flange (11), the outlet flange (12), and the connecting flange (13), characterized in that: The valve body (1) has a guide body (14) inside. The guide body (14) is rectangular in shape in the middle and has a through installation flow hole (141) in the middle. The guide body (14) has an upper partition arm (142) and a lower partition arm (143) formed diagonally at the top and bottom. The upper partition arm (142) and the lower partition arm (143) are fixed to the inner walls of the upper and lower ends of the valve body (1), respectively. 2) An upper flow channel (144) and a lower flow channel (145) are formed between the lower partition arm (143) and the valve cavity, respectively. The sealing cover (3) is fixedly connected to the connecting flange (13). The valve disc body (2) is fixedly connected to the end of the valve stem (4) and the valve stem (4) passes through the sealing cover (3). The valve disc body (2) is installed in the installation flow hole (141). A wear-resistant bushing (5) is fixedly fitted on the outside of the valve disc body (2).

2. A shut-off valve according to claim 1, characterized in that: The sealing cover (3) has a sealing groove (31) and a sealing packing (6) is installed in the sealing groove (31). A packing gland (7) is fixedly installed on the upper end of the sealing packing (6). The sealing packing (6) and the packing gland (7) are sleeved on the outside of the valve stem (4) and connected to the valve stem (4).

3. A shut-off valve according to claim 1, characterized in that: A conical sealing block (32) is formed at the lower end of the sealing cap (3).

4. A shut-off valve according to claim 1, characterized in that: The upper partition arm (142) and the lower partition arm (143) are tilted at an angle of 55°, and the ends of the upper partition arm (142) and the lower partition arm (143) are respectively formed with the valve cavity as an upper guide angle (146) and a lower guide angle (147).

5. A shut-off valve according to claim 1, characterized in that: The lower end of the valve disc body (2) has an arc-shaped concave structure (21).

6. A shut-off valve according to claim 1, characterized in that: The upper end of the valve stem (4) has a threaded structure (41) and a handwheel (8) is installed on the upper end of the valve stem (4).

Images