Integral type square valve without bolt structure

Abstract

The utility model discloses an integral type square valve without a bolt structure, and particularly relates to the field of square valves, the integral type square valve comprises a square valve body, a blade is arranged in the square valve body, a support frame is fixedly arranged at the upper end of the square valve body, and a worm and gear transmission box is arranged on the support frame. The input end of the worm and gear transmission box is connected with a rotating handle, the output end of the worm and gear transmission box is connected with a plurality of blades through a transmission mechanism, and a cover plate is fixedly arranged at the upper end of the square valve body through bolts. The side plates, the upper end plate and the lower end plate of the square valve body are welded and fixed, the overall strength and the sealing performance of the square valve body are improved, the square valve body is suitable for high-pressure working conditions, the cover plate is arranged at the upper end of the square valve body, maintenance of a transmission mechanism and the blades is facilitated after the cover plate is detached, the maintenance time is shortened, the maintenance cost is reduced, the blades are long-strip PTFE sealing plates, and the service life is prolonged. And a better sealing effect is provided through the use of a sealing compensation structure with a built-in fluororubber strip and the design of a bolt-free structure.

Description

Technical Field

[0001] This utility model relates to the field of square valve technology, specifically an integral boltless square valve. Background Technology

[0002] Control valves are widely used in industries such as petroleum, chemical, metallurgy, pharmaceutical, power, water conservancy, and pumping stations. They regulate the flow rate of liquids or gases by adjusting the valve's opening. The media flowing through control valves often contain corrosive substances such as acids and alkalis, as well as toxic, harmful, and volatile gases or liquids. Therefore, the sealing and corrosion resistance of control valves are particularly important. However, square valves often experience sealing failure in corrosive environments. The valve body structure uses bolt assembly, with overlapping blades. Leaks can easily occur at the valve body gaps due to deformation caused by bolt tightening, and corrosion and deformation of the sealing rubber on the blades can also lead to leakage.

[0003] The existing solution is as follows:

[0004] 1. The valve body still uses bolt splicing. If a leakage problem occurs, the machine can be stopped directly for valve repair or blade replacement. However, the risk of leakage at the valve body gaps is still relatively high.

[0005] 2. The valve body is welded, but it is difficult to replace the internal structure of the valve body after leakage occurs, resulting in high maintenance costs. Utility Model Content

[0006] The purpose of this invention is to provide an integral boltless square valve to solve the problems raised in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An integral boltless square valve includes a square valve body with multiple sealing overlapping blades inside. A support frame is fixedly mounted on the upper end of the square valve body, and a worm gear transmission box is mounted on the support frame. A rotary handle is connected to the input end of the worm gear transmission box, and the output end of the worm gear transmission box is connected to the multiple blades through a transmission mechanism. A cover plate is fixedly mounted on the upper end of the square valve body with bolts.

[0009] In a preferred embodiment, each blade has a fixed rotating shaft at its upper end, and one of the rotating shafts is fixedly connected to the output end of a worm gear transmission box. The worm gear transmission box drives multiple rotating shafts to rotate, thereby realizing the rotation adjustment of multiple blades.

[0010] In a preferred embodiment, the transmission mechanism includes a first connecting rod fixedly mounted on one of the rotating shafts, a second connecting rod rotatably mounted at one end of the first connecting rod, a third connecting rod and a fourth connecting rod rotatably mounted at one end of the second connecting rod, the third connecting rod mounted on a second rotating shaft, a fifth connecting rod rotatably mounted at one end of the fourth connecting rod, and one end of the fifth connecting rod mounted on a third rotating shaft. When one of the rotating shafts rotates under the drive of the worm gear transmission box, it can drive the other rotating shafts to rotate through multiple connecting rods, thereby realizing the synchronous rotation adjustment of multiple blades.

[0011] In a preferred embodiment, a sealing ring is provided at the connection between the rotating shaft and the side wall of the square valve body, and a sealing groove matching the sealing ring is provided on the side wall of the square valve body. Both the sealing ring and the sealing groove are annular structures, which can improve the sealing effect of the square valve body.

[0012] In a preferred embodiment, the left side plate, right side plate, lower end plate, and upper end plate of the square valve body are welded and fixed together. The blade is a long strip-shaped PTFE sealing plate, and a fluororubber sealing strip is built into the blade. The welding and fixing of the side plate and the upper and lower end plates improves the overall strength and sealing performance of the square valve body. The long strip-shaped PTFE sealing plate, with built-in fluororubber strip sealing compensation, provides a better sealing effect and meets the sealing requirements.

[0013] In a preferred embodiment, the inner wall of the square valve body is provided with an ETFE anti-corrosion coating, which improves the service life of the square valve body.

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

[0015] 1. The side plates and upper and lower end plates of the square valve body of this utility model are welded and fixed, which improves the overall strength and sealing performance of the square valve body and is suitable for high-pressure working conditions;

[0016] 2. The square valve body of this utility model is provided with a cover plate at the upper end. After the cover plate is removed, it is convenient to maintain the transmission mechanism and blades, reducing maintenance time and cost.

[0017] 3. The blade of this utility model adopts a long strip PTFE sealing plate, and the use of a built-in fluororubber strip sealing compensation structure and boltless structure design provides a better sealing effect and meets the sealing requirements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the cover plate after disassembly.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0022] Figure 5 This is a schematic diagram of the blade structure of this utility model.

[0023] The following are the labels in the diagram: 1. Square valve body; 2. Blade; 3. Support frame; 4. Worm gear transmission box; 5. Rotary handle; 6. Cover plate; 7. Rotating shaft; 8. First connecting rod; 9. Second connecting rod; 10. Third connecting rod; 11. Fourth connecting rod; 12. Fifth connecting rod; 13. Sealing ring. 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] Example: Please refer to Figures 1-4 This utility model provides an integral boltless square valve, the technical solution of which is as follows:

[0026] An integral boltless square valve includes a square valve body 1, with multiple sealing overlapping blades 2 disposed inside the square valve body 1. A support frame 3 is fixedly disposed at the upper end of the square valve body 1, and a worm gear transmission box 4 is disposed on the support frame 3. A rotating handle 5 is connected to the input end of the worm gear transmission box 4, and the output end of the worm gear transmission box 4 is connected to the multiple blades 2 through a transmission mechanism. A cover plate 6 is fixedly disposed at the upper end of the square valve body 1 by bolts.

[0027] In a preferred embodiment, each blade 2 has a fixed rotating shaft 7 at its upper end. One of the rotating shafts 7 is fixedly connected to the output end of the worm gear transmission box 4. The transmission mechanism includes a first connecting rod 8 fixedly mounted on one of the rotating shafts 7. A second connecting rod 9 is rotatably mounted at one end of the first connecting rod 8. A third connecting rod 10 and a fourth connecting rod 11 are rotatably mounted at one end of the second connecting rod 9. The third connecting rod 10 is mounted on the second rotating shaft 7. A fifth connecting rod 12 is rotatably mounted at one end of the fourth connecting rod 11. One end of the fifth connecting rod 12 is mounted on the third rotating shaft 7. The worm gear transmission box 4 is driven to run by a rotating handle 5. When the worm gear transmission box 4 runs, it can drive one of the rotating shafts 7 to rotate. When the rotating shaft 7 rotates, it can drive the first connecting rod 8 to rotate within a certain range, thereby pulling the second connecting rod 9 to move. When the second connecting rod 9 moves, it can drive the second rotating shaft 7 to rotate through the third connecting rod 10, and it can also drive the third rotating shaft 7 to rotate through the fourth connecting rod 11 and the fifth connecting rod 12, thereby achieving synchronous rotation of the three blades 2.

[0028] In a preferred embodiment, a sealing ring 13 is provided at the connection between the rotating shaft 7 and the side wall of the square valve body 1, and a sealing groove matching the sealing ring 13 is provided on the side wall of the square valve body 1. The sealing ring 13 and the sealing groove can improve the sealing performance of the square valve body 1.

[0029] In a preferred embodiment, the left side plate, right side plate, lower end plate, and upper end plate of the square valve body 1 are welded and fixed together. The blade 2 is a long strip PTFE sealing plate, and a fluororubber sealing strip is built into the blade 2. The welding and fixing of the side plate and the upper and lower end plates improves the overall strength and sealing performance of the square valve body. The long strip PTFE sealing plate, with built-in fluororubber strip sealing compensation, provides a better sealing effect and meets the sealing requirements.

[0030] In a preferred embodiment, the inner wall of the square valve body 1 is provided with an ETFE anti-corrosion coating, which improves the service life of the square valve body.

[0031] The working principle of this utility model:

[0032] When adjusting the square valve body 1, rotate the rotary handle 5. Rotating the handle 5 drives the worm gear transmission box 4 to rotate. When the worm gear transmission box 4 is running, it can drive one of the rotating shafts 7 to rotate. When the rotating shaft 7 rotates, it can drive the first connecting rod 8 to rotate within a certain range, thereby pulling the second connecting rod 9 to move. When the second connecting rod 9 moves, it can drive the second rotating shaft 7 to rotate through the third connecting rod 10, and it can also drive the third rotating shaft 7 to rotate through the fourth connecting rod 11 and the fifth connecting rod 12, so as to realize the synchronous rotation adjustment of the three blades 2. The upper end plate of the square valve body 1 is provided with mounting holes and drain holes. After the blades 2 are installed through the mounting holes, the upper long strip PTFE sealing plate (with built-in fluororubber strip sealing compensation structure) is placed in, and then the expanded PTFE sealing plate is placed in. It is fixed with a cover plate using studs to ensure end sealing and ensure that the valve has no risk of external leakage. When it is necessary to maintain the blades 2, transmission structure, etc., the cover plate 6 can be removed, which reduces maintenance time and cost.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An integral boltless square valve, comprising a square valve body (1), wherein the square valve body (1) is provided with a plurality of sealing overlapping blades (2), characterized in that: A support frame (3) is fixedly installed on the upper end of the square valve body (1). A worm gear transmission box (4) is installed on the support frame (3). A rotating handle (5) is connected to the input end of the worm gear transmission box (4). The output end of the worm gear transmission box (4) is connected to multiple blades (2) through a transmission mechanism. A cover plate (6) is fixedly installed on the upper end of the square valve body (1) by bolts.

2. The integral boltless square valve according to claim 1, characterized in that: Each blade (2) has a fixed rotating shaft (7) at its upper end, and one of the rotating shafts (7) is fixedly connected to the output end of the worm gear transmission box (4).

3. The integral boltless square valve according to claim 2, characterized in that: The transmission mechanism includes a first connecting rod (8) fixedly mounted on one of the rotating shafts (7), a second connecting rod (9) rotatably mounted on one end of the first connecting rod (8), a third connecting rod (10) and a fourth connecting rod (11) rotatably mounted on one end of the second connecting rod (9), the third connecting rod (10) being mounted on the second rotating shaft (7), a fifth connecting rod (12) rotatably mounted on one end of the fourth connecting rod (11), and one end of the fifth connecting rod (12) being mounted on the third rotating shaft (7).

4. The integral boltless square valve according to claim 2, characterized in that: A sealing ring (13) is provided at the connection between the rotating shaft (7) and the side wall of the square valve body (1), and a sealing groove matching the sealing ring (13) is provided on the side wall of the square valve body (1).

5. The integral boltless square valve according to claim 1, characterized in that: The left side plate, right side plate, lower end plate and upper end plate of the square valve body (1) are welded and fixed together. The blade (2) is a long strip of PTFE sealing plate and a built-in fluororubber sealing strip is installed on the blade (2).

6. The integral boltless square valve according to claim 1, characterized in that: The inner wall of the square valve body (1) is provided with an ETFE anti-corrosion coating.

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