Straight-through type sealing stop valve

Abstract

The utility model relates to the technical field of stop valves, and particularly discloses a straight-through type sealing stop valve which comprises a valve body, a flow channel is formed in the valve body, a valve clack is movably installed on the top of the flow channel, a supporting assembly is arranged below the valve clack, the top of the valve clack is rotationally connected with a valve rod through a bearing, and the valve rod is connected with a valve rod. The valve rod is sleeved with a supporting spring, and the two ends of the supporting spring are connected with the valve clack and the inner wall of the valve body correspondingly. The supporting assembly comprises a supporting column with the top of a conical structure, the bottom of the supporting column is rotationally connected with an adjusting screw rod through a bearing, a sealing nut is arranged at the joint of the adjusting screw rod and the valve body, a rotary knob is welded to the bottom of the adjusting screw rod, a valve deck penetrates through the top of the valve rod, and a supporting frame is welded to the top of the valve deck. A hand wheel is welded to the end, penetrating through the supporting frame, of the valve rod. The valve clack can be supported through the supporting assembly, and the stability of the valve clack is improved in cooperation with the valve rod.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to a straight-through sealing gate valve. Background Technology

[0002] A straight-through sealed gate valve relies on the pressure of the valve stem to ensure a tight seal between the valve disc sealing surface and the valve seat sealing surface, thereby preventing the flow of media. When it is necessary to open the valve, rotating the valve stem causes the valve disc to move away from the valve seat, allowing the media to pass through.

[0003] Current straight-through sealing gate valves include components such as valve body, valve cover, valve stem, valve disc, and valve seat. By turning the handwheel, the valve stem moves downward, which in turn moves the valve disc downward until the valve disc sealing surface and the valve seat sealing surface are tightly fitted together, forming an effective sealing barrier to prevent the fluid from passing through. Conversely, the valve stem moves the valve disc upward, and the gap between the valve disc and the valve seat gradually increases, allowing the fluid to pass through the valve through the gap.

[0004] Because the valve disc is subjected to the combined effects of medium pressure and operating force during the opening and closing process, if there is insufficient support, the valve disc may deform or be damaged, thereby affecting the sealing performance and service life of the valve. Summary of the Invention

[0005] The purpose of this utility model is to provide a straight-through sealing stop valve that can support the valve disc through a support component and improve the stability of the valve disc in conjunction with the valve stem, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a straight-through sealing stop valve, comprising a valve body, wherein a flow channel is provided inside the valve body, a valve disc is movably installed at the top of the flow channel, and a support assembly is provided below the valve disc, a valve stem is rotatably connected to the top of the valve disc via a bearing, and a support spring is sleeved on the outside of the valve stem, with the two ends of the support spring respectively connected to the valve disc and the inner wall of the valve body;

[0007] The support assembly includes a support column with a tapered top, and an adjusting screw is rotatably connected to the bottom of the support column via a bearing. A sealing nut is provided at the connection between the adjusting screw and the valve body, and a knob is welded to the bottom of the adjusting screw.

[0008] Preferably, the top of the valve stem passes through a valve cover, and a support frame is welded to the top of the valve cover. A handwheel is welded to one end of the valve stem that passes through the support frame.

[0009] Preferably, a drain outlet is fixedly connected to the right side of the valve body, and a water inlet is fixedly connected to the left side of the valve body.

[0010] Preferably, a pressure relief assembly is installed inside the support column, the pressure relief assembly including four sets of movable rods that pass through the bottom of the support column and the valve body.

[0011] Preferably, a guide hole is provided at the connection between the movable rod and the support column, and a pressure relief hole is provided at the connection between the movable rod and the valve body.

[0012] Preferably, a sealing ring is provided between the pressure relief hole and the movable rod, and a lifting plate is welded to the top of the movable rod, and the lifting plate slides up and down inside the support column.

[0013] Preferably, a telescopic rod is fixedly installed on the top of the lifting plate, and a connecting spring is sleeved on the outside of the telescopic rod. An electromagnet is installed parallel to the bottom of the lifting plate and fixed inside the support column.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Through the set support components, the support column can move upward to below the valve disc and abut against the valve disc. Since the upper and lower sides of the valve disc are respectively pressed against by the valve stem and the support column, the cooperation with the valve stem can provide stability for the valve disc.

[0016] 2. The pressure relief component allows the height of the lifting plate to be adjusted via an electromagnet, thereby adjusting the position of the movable rod. Under the action of the adjusting screw, the movable rod is moved away from the pressure relief hole, thus achieving pressure relief. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is an overall structural view of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the valve body of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Enlarged view of A in the middle;

[0021] Figure 4 This is a schematic diagram of the internal structure of the support column of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Valve body; 2. Handwheel; 3. Support assembly; 301. Knob; 302. Adjusting screw; 303. Support column; 304. Sealing nut; 4. Inlet; 5. Drain; 6. Valve stem; 7. Support frame; 8. Valve cover; 9. Support spring; 10. Valve disc; 11. Flow channel; 12. Pressure relief assembly; 1201. Movable rod; 1202. Lifting plate; 1203. Telescopic rod; 1204. Connecting spring; 1205. Electromagnet; 1206. Pressure relief hole; 1207. Guide hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides a technical solution:

[0026] Please see Figures 1 to 4 A straight-through sealing stop valve includes a valve body 1, a flow channel 11 is provided inside the valve body 1, a valve disc 10 is movably installed on the top of the flow channel 11, and a support assembly 3 is provided below the valve disc 10. A valve stem 6 is rotatably connected to the top of the valve disc 10 through a bearing, and a support spring 9 is sleeved on the outside of the valve stem 6. The two ends of the support spring 9 are respectively connected to the valve disc 10 and the inner wall of the valve body 1.

[0027] The support assembly 3 includes a support column 303 with a tapered top, and an adjusting screw 302 is rotatably connected to the bottom of the support column 303 via a bearing. A sealing nut 304 is provided at the connection between the adjusting screw 302 and the valve body 1. A knob 301 is welded to the bottom of the adjusting screw 302. A valve cover 8 passes through the top of the valve stem 6, and a support frame 7 is welded to the top of the valve cover 8. A handwheel 2 is welded to one end of the valve stem 6 that passes through the support frame 7. A drain port 5 is fixedly connected to the right side of the valve body 1, and a water inlet 4 is fixedly connected to the left side of the valve body 1.

[0028] By adopting the above technical solution, when it is necessary to close the valve body 1, turn the handwheel 2. The handwheel 2 drives the valve stem 6 to rotate. The valve stem 6 rotates inside the support frame 7. A valve stem nut is provided at the connection between the valve stem 6 and the support frame 7. Push the valve stem 6 to move downward. At this time, the valve disc 10 moves downward. The valve disc 10 fits against the top of the flow channel 11, thereby closing the flow channel 11. The fluid cannot move from the inlet 4 to the outlet 5. At the same time, turn the knob 301. The knob 301 drives the adjusting screw 302 to rotate. The adjusting screw 302 rotates inside the sealing nut 304, which pushes the support column 303 to move upward. The support column 303 presses against the bottom of the valve disc 10, thereby supporting the bottom of the valve disc 10. Since the upper and lower sides of the valve disc 10 are pressed against by the valve stem 6 and the support column 303 respectively, the cooperation with the valve stem 6 can provide stability for the valve disc 10. While the valve disc 10 moves downward, the support spring 9 is stretched outward.

[0029] Specifically, such as Figure 4 As shown, a pressure relief assembly 12 is installed inside the support column 303. The pressure relief assembly 12 includes four sets of movable rods 1201 that pass through the bottom of the support column 303 and the valve body 1. A guide hole 1207 is provided at the connection between the movable rod 1201 and the support column 303, and a pressure relief hole 1206 is provided at the connection between the movable rod 1201 and the valve body 1. A sealing ring is provided between the pressure relief hole 1206 and the movable rod 1201. A lifting plate 1202 is welded to the top of the movable rod 1201, and the lifting plate 1202 slides up and down inside the support column 303. A telescopic rod 1203 is fixedly provided on the top of the lifting plate 1202, and a connecting spring 1204 is sleeved on the outside of the telescopic rod 1203. An electromagnet 1205 fixed inside the support column 303 is arranged parallel to the bottom of the lifting plate 1202.

[0030] By adopting the above technical solution, when pressure relief is required, the electromagnet 1205 can be de-energized. At this time, the attraction between the electromagnet 1205 and the lifting plate 1202 disappears. The lifting plate 1202 is an iron plate. When the attraction between the lifting plate 1202 and the electromagnet 1205 disappears, the lifting plate 1202 can be driven to move upward under the elastic action of the connecting spring 1204. The lifting plate 1202 presses the telescopic rod 1203 upward, and at the same time, the lifting plate 1202 drives the movable rod 1201 to move upward, so that the movable rod 1201 slides inside the guide hole 1207. At the same time, the knob 301 is rotated, and the knob 301 drives the adjusting screw 302 to rotate. The adjusting screw 302 rotates inside the sealing nut 304. This will push the support column 303 upward. At the same time, the upward movement of the support column 303 will drive the lifting plate 1202 upward, causing the movable rod 1201 on the lifting plate 1202 to move upward and insert into the interior of the pressure relief hole 1206. The fluid in the valve body 1 can be discharged outward through the pressure relief hole 1206. It should be noted that in order to restrict the movement direction of the support column 303, two of the four sets of movable rods 1201 are shorter than the other two sets. When two sets of movable rods 1201 are disengaged from the pressure relief hole 1206, fluid flows out of the pressure relief hole 1206, while the other two sets of movable rods 1201 are always inserted into the interior of the pressure relief hole 1206, which serves as a guide for the support column 303.

[0031] Working principle: When it is necessary to close the valve body 1, turn the handwheel 2. The handwheel 2 drives the valve stem 6 to rotate. The valve stem 6 rotates inside the support frame 7. A valve stem nut is provided at the connection between the valve stem 6 and the support frame 7, pushing the valve stem 6 to move downward. At this time, the valve disc 10 moves downward and fits against the top of the flow channel 11, thereby closing the flow channel 11. The fluid cannot move from the inlet 4 to the outlet 5. At the same time, turn the knob 301. The knob 301 drives the adjusting screw 302 to rotate. The adjusting screw 302 rotates inside the sealing nut 304, which pushes the support column 303 to move upward, so that the support column 303 presses against the bottom of the valve disc 10, thereby supporting the bottom of the valve disc 10. When it is necessary to release pressure, the electromagnet 1205 can be de-energized. At this time, the attraction between the electromagnet 1205 and the lifting plate 1202 disappears, and the lifting plate 1202 becomes... When the attraction between the lifting plate 1202 and the electromagnet 1205 disappears, the lifting plate 1202, under the elastic action of the connecting spring 1204, can move upward. The lifting plate 1202 presses the telescopic rod 1203 upward, and at the same time, the lifting plate 1202 drives the movable rod 1201 to move upward, so that the movable rod 1201 slides inside the guide hole 1207. At the same time, the knob 301 is rotated, and the knob 301 drives the adjusting screw 302 to rotate. The adjusting screw 302 rotates inside the sealing nut 304, which pushes the support column 303 to move upward. At this time, the upward movement of the support column 303 can drive the lifting plate 1202 to move upward, so that the movable rod 1201 on the lifting plate 1202 moves upward and inserts into the pressure relief hole 1206. The fluid in the valve body 1 can be discharged outward through the pressure relief hole 1206.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A straight-through seal globe valve comprising a valve body (1), characterized in that: The inside of the valve body (1) is provided with a flow channel (11), the top of the flow channel (11) is movably provided with a valve clack (10), and the lower part of the valve clack (10) is provided with a supporting assembly (3), the top of the valve clack (10) is rotatably connected with a valve stem (6) through a bearing, and the outer part of the valve stem (6) is sleeved with a supporting spring (9), and the two ends of the supporting spring (9) are connected with the inner wall of the valve body (1) and the valve clack (10) respectively. The supporting assembly (3) comprises a supporting column (303) with a conical structure at the top, and the bottom of the supporting column (303) is rotatably connected with an adjusting screw (302) through a bearing, and the connecting part of the adjusting screw (302) and the valve body (1) is provided with a sealing nut (304), and the bottom of the adjusting screw (302) is welded with a knob (301).

2. A through seal globe valve according to claim 1, wherein: The top of the valve stem (6) is penetrated with a valve cover (8), and the top of the valve cover (8) is welded with a supporting frame (7), and one end of the valve stem (6) penetrating the supporting frame (7) is welded with a hand wheel (2).

3. The through seal globe valve according to claim 1, wherein: The right side of the valve body (1) is fixedly connected with a drain port (5), and the left side of the valve body (1) is fixedly connected with a water inlet (4).

4. The through seal globe valve according to claim 1, wherein: The inside of the supporting column (303) is provided with a pressure relief assembly (12), and the pressure relief assembly (12) comprises four groups of movable rods (1201) penetrating the supporting column (303) and the bottom of the valve body (1).

5. A through-seal globe valve according to claim 4, wherein: The connecting part of the movable rod (1201) and the supporting column (303) is provided with a guide hole (1207), and the connecting part of the movable rod (1201) and the valve body (1) is provided with a pressure relief hole (1206).

6. A through seal globe valve according to claim 5 wherein: The pressure relief hole (1206) and the movable rod (1201) are provided with a sealing ring, the top of the movable rod (1201) is welded with a lifting plate (1202), and the lifting plate (1202) slides up and down in the inside of the supporting column (303).

7. A through seal globe valve according to claim 6, wherein: The top of the lifting plate (1202) is fixedly provided with an extension rod (1203), and the outer part of the extension rod (1203) is sleeved with a connecting spring (1204), and the lower part of the lifting plate (1202) is provided in parallel with an electromagnet (1205) fixed in the inside of the supporting column (303).

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