PVDF (Polyvinylidene Fluoride) plastic control valve for backflow water of water heater

Abstract

The utility model relates to the technical field of PVDF (Polyvinylidene Fluoride) plastic control valves, in particular to a PVDF plastic control valve for backflow water of a water heater, which comprises a PVDF plastic control valve main body, a valve cover is fixedly arranged on the upper side of the PVDF plastic control valve main body, reinforcing bolts distributed in an array are mounted on the upper side of the valve cover in a threaded manner, and positioning nuts are in threaded connection with the outer surfaces of the reinforcing bolts. The PVDF plastic control valve can be assembled and positioned together through the two first U-shaped clamping seats and the two second U-shaped clamping seats, so that the PVDF plastic control valve can be conveniently and firmly assembled in a clamping mode, the stability of the PVDF plastic control valve is ensured, meanwhile, the sealing cover can play a waterproof role, reinforcing bolts are prevented from being rusted when meeting water, and the service life of the PVDF plastic control valve is prolonged. The two protruding plates at the telescopic top plate are clamped to the valve rod hand wheel so that the valve rod hand wheel can be conveniently limited and fixed, the situation that the PVDF plastic control valve is rotated due to the fact that the valve rod hand wheel is touched by mistake is avoided, and the stability of the whole PVDF plastic control valve in the using process is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to PVDF plastic control valve technical field, concretely is PVDF plastic control valve for water heater backflow. BACKGROUND

[0002] The PVDF plastic control valve is used for controlling the flow of fluid medium and ensuring reliable operation in corrosive or high-temperature environments. The PVDF plastic control valve is made of polyvinylidene fluoride (PVDF) material, which has excellent corrosion resistance and high strength, and is particularly suitable for use in harsh working conditions, thereby ensuring the stability and safety of the production process.

[0003] The prior art discloses a patent application number "CN201720465845.7", a plastic production equipment dye dosage proportioning control valve, which comprises a valve, the main body of the valve is in the form of a horizontal pipe, an outlet pipe is vertically arranged in the middle of the valve, a feeding device is symmetrically arranged at the left end and the right end of the valve, the two feeding devices are the same, and the shell of the feeding device is in the form of a "convex" cylindrical structure, a partition plate is arranged in the middle of the valve, connecting rods are vertically arranged on the left side and the right side of the partition plate, a circular plate is fixedly arranged at the position of the valve port where the feeding device is located, the circular plate is located in the large-radius cylindrical cavity of the feeding device, and a flow regulating plate is arranged on the outer side of the circular plate, the end of the connecting rod penetrates the center of the circular plate, and the end of the connecting rod is movably connected with the center of the flow regulating plate.

[0004] The control valve can only realize quantitative proportioning feeding, but in actual use, the existing PVDF plastic control valve is usually assembled and fixed by bolts and nuts, which is not convenient and firm to install, has poor overall stability, and the bolts are also prone to rust when encountering water, thereby affecting the dismounting efficiency of the PVDF plastic control valve and being inconvenient to use. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a PVDF plastic control valve for water heater backflow to solve the problems in the above background.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] A PVDF plastic control valve for water heater backflow comprises a PVDF plastic control valve body, a valve cover fixed on the upper side of the PVDF plastic control valve body, reinforced bolts arranged in an array and threadedly installed on the upper side of the valve cover, positioning nuts threadedly connected to the outer surfaces of the reinforced bolts, and a valve stem handle rotatably installed on the upper side of the valve cover.

[0008] Both ends of the PVDF plastic control valve body and the valve cover are clamped with U-shaped clamping bases one, the upper sides of the two U-shaped clamping bases one are clamped with positioning insertion rods, the lower sides of the two U-shaped clamping bases one are fixedly installed with bottom plates, the interiors of the two bottom plates are clamped with limiting clamping plates for fixing the positioning insertion rods, the lower sides of the two bottom plates are screw-connected with first fastening bolts for fixing the limiting clamping plates, the upper sides of the two U-shaped clamping bases one are clamped with two connecting plates, and the lower sides of the four connecting plates are fixedly provided with sealing covers for protecting the fastening bolts.

[0009] Preferably, the outer surface of the PVDF plastic control valve body is fixedly connected with an L-shaped plate, the upper side of the L-shaped plate is slidingly connected with a telescopic top plate, the right side of the telescopic top plate is fixedly connected with two protruding plates for positioning a valve rod hand wheel, the telescopic top plate and the L-shaped plate are fixedly connected with connecting springs, and the lower side of the telescopic top plate penetrates through the L-shaped plate and extends to the top end in the interior of the L-shaped plate.

[0010] Preferably, the lower side of the telescopic top plate is fixedly installed with a base, one side of the L-shaped plate is rotatably connected with a cam rotating rod, one side of the cam rotating rod penetrates through the L-shaped plate and extends to the other side of the L-shaped plate, and the left side of the cam rotating rod is fixedly connected with an operation hand wheel.

[0011] Preferably, the two sides of the PVDF plastic control valve body and the valve cover are clamped with two U-shaped clamping bases two, the lower sides of the two U-shaped clamping bases two are screw-connected with second fastening bolts for fixing the U-shaped clamping bases two, the upper sides of the second fastening bolts penetrate through the U-shaped clamping bases one and extend to the interior of the PVDF plastic control valve body, the outer surface of the PVDF plastic control valve body is fixedly connected with a vertical plate, the interiors of the L-shaped plate and the vertical plate are screw-connected with positioning bolts, the inner sides of the two positioning bolts are fixedly provided with circular seats, one side of each of the two U-shaped clamping bases two is provided with a circular groove, and the circular seat is located in the interior of the circular groove.

[0012] Preferably, the lower side of the fastening bolt penetrates through the valve cover and extends to one side of the PVDF plastic control valve body, the lower side of the positioning insertion rod penetrates through the PVDF plastic control valve body and the valve cover and extends to the lower side of the U-shaped clamping base one, one side of the limiting clamping plate penetrates through the positioning insertion rod and extends to one side of the positioning insertion rod, and the outer surface of the PVDF plastic control valve body is fixedly connected with two reinforcing plates arranged symmetrically.

[0013] Preferably, the lower side of the base is provided with a groove, the groove is matched with the cam rotating rod, and the top of the cam rotating rod is clamped with the lower side of the base through the groove.

[0014] The utility model discloses the following beneficial effects:

[0015] 1. This utility model allows two U-shaped card holders and two U-shaped card holders to be assembled and positioned together to create a PVDF plastic control valve. This snap-fit ​​method allows for convenient and secure assembly of the PVDF plastic control valve, ensuring its stability. At the same time, the sealing cap can provide waterproofing, preventing the reinforcing bolts from rusting when exposed to water, thus improving the efficiency of PVDF plastic control valve assembly and disassembly.

[0016] 2. This utility model drives the cam rod to rotate by rotating the operating handwheel, so that the cam rod is engaged with the inside of the base, allowing the telescopic top plate with the connecting spring to move upward. In this way, the two protrusions at the telescopic top plate are engaged with the valve stem handwheel to limit and fix the valve stem handwheel, preventing accidental activation of the valve stem handwheel and rotating the PVDF plastic control valve, thus ensuring the stability of the entire PVDF plastic control valve during use. Attached Figure Description

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

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

[0019] Figure 2 This is a utility model Figure 1 Installation diagram of the U-shaped card holder and the positioning rod;

[0020] Figure 3 This is a utility model Figure 1 Installation diagram of the second U-shaped clip and the second fastening bolt;

[0021] Figure 4 This is a utility model Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a utility model Figure 3 Enlarged view of point B in the middle;

[0023] Figure 6 This is a utility model Figure 1 Schematic diagram of the structure of the telescopic top plate and the convex plate;

[0024] The attached figures are labeled as follows:

[0025] 1. PVDF plastic control valve body; 2. Valve cover; 3. Reinforcing bolt; 4. Positioning nut; 5. Valve stem handwheel; 6. U-shaped retainer one; 7. Positioning rod; 8. Base plate; 9. Limiting plate; 10. First fastening bolt; 11. Reinforcing plate; 12. L-shaped plate; 13. Telescopic top plate; 14. Protruding plate; 15. Base; 16. Connecting spring; 17. Cam rotating rod; 18. Operating handwheel; 19. Vertical plate; 20. Positioning bolt; 21. Round seat; 22. U-shaped retainer two; 23. Second fastening bolt; 24. Round groove; 25. Groove; 26. Connecting plate; 27. Sealing cover. Detailed Implementation

[0026] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 6 As shown, a PVDF plastic control valve for water return in a water heater includes a PVDF plastic control valve body 1. The PVDF plastic control valve can resist the corrosion of various chemical media. A valve cover 2 is fixedly provided on the upper side of the PVDF plastic control valve body 1. An array of reinforcing bolts 3 are threadedly installed on the upper side of the valve cover 2. A positioning nut 4 is threadedly connected to the outer surface of the reinforcing bolts 3. A valve stem handwheel 5 is rotatably installed on the upper side of the valve cover 2.

[0028] Both ends of the PVDF plastic control valve body 1 and valve cover 2 are fitted with U-shaped retainers 6. Positioning rods 7 are fitted onto the upper sides of both U-shaped retainers 6. The installation of the U-shaped retainers 6 and positioning rods 7 reinforces the installation of the U-shaped retainers 6, ensuring the stability of the PVDF plastic control valve during assembly. Base plates 8 are fixedly installed on the lower sides of both U-shaped retainers 6. Limiting plates 9 for fixing the positioning rods 7 are fitted inside the two base plates 8. First fastening bolts 10 for fixing the limiting plates 9 are threaded onto the lower sides of both base plates 8. Two connecting plates 26 are fitted onto the upper sides of both U-shaped retainers 6. Sealing caps 27 for protecting and reinforcing the bolts 3 are fixedly installed on the lower sides of all four connecting plates 26.

[0029] An L-shaped plate 12 is fixedly connected to the outer surface of the PVDF plastic control valve body 1. A telescopic top plate 13 is slidably connected to the upper side of the L-shaped plate 12. Two protruding plates 14 for positioning the valve stem handwheel 5 are fixedly connected to the right side of the telescopic top plate 13. A connecting spring 16 is fixedly connected between the telescopic top plate 13 and the L-shaped plate 12. By setting the connecting spring 16, the telescopic top plate 13 can be moved up and down, so that the telescopic top plate 13 can be extended and adjusted to facilitate the positioning of the valve stem handwheel 5. The lower side of the telescopic top plate 13 passes through the L-shaped plate 12 and extends to the top of the interior of the L-shaped plate 12.

[0030] A base 15 is fixedly installed on the lower side of the telescopic top plate 13. A cam rod 17 is rotatably connected to one side of the L-shaped plate 12. One side of the cam rod 17 passes through the L-shaped plate 12 and extends to the other side of the L-shaped plate 12. An operating handwheel 18 is fixedly connected to the left side of the cam rod 17.

[0031] Two U-shaped clips 22 are snapped onto both sides of the PVDF plastic control valve body 1 and valve cover 2. The lower side of each U-shaped clip 22 is threaded with a second fastening bolt 23 for fixing the U-shaped clip 22. The upper side of the second fastening bolt 23 passes through the U-shaped bracket 6 and extends into the interior of the PVDF plastic control valve body 1. A vertical plate 19 is fixedly connected to the outer surface of the PVDF plastic control valve body 1. The interior of the L-shaped plate 12 and the vertical plate 19 is threaded with positioning bolts 20. The inner side of each positioning bolt 20 is fixed with a round seat 21. A round groove 24 is opened on one side of each U-shaped clip 22, and the round seat 21 is located inside the round groove 24.

[0032] The lower side of the reinforcing bolt 3 penetrates the valve cover 2 and extends to one side of the PVDF plastic control valve body 1. The lower side of the positioning rod 7 penetrates the PVDF plastic control valve body 1 and the valve cover 2 and extends to the lower side of the U-shaped bracket 6. One side of the limiting plate 9 penetrates the positioning rod 7 and extends to one side of the positioning rod 7. Two symmetrically arranged reinforcing plates 11 are fixedly connected to the outer surface of the PVDF plastic control valve body 1. The reinforcing plates 11 can strengthen the PVDF plastic control valve and extend its service life.

[0033] The base 15 has a groove 25 on its lower side, which is adapted to the cam rod 17. The top of the cam rod 17 is engaged with the lower side of the base 15 through the groove 25.

[0034] The working principle of the PVDF plastic control valve for water return in a water heater provided by this utility model is as follows:

[0035] The PVDF plastic control valve body 1 and valve cover 2 can be initially fixed using the reinforcing bolts 3 and positioning nuts 4. Then, two U-shaped retainers 6 are sequentially attached to the front and rear ends of the PVDF plastic control valve body 1. Next, two positioning rods 7 are inserted into the interior of the PVDF plastic control valve body 1 to position the PVDF plastic control valve body 1 and the U-shaped retainers 6. Then, the limiting plate 9 at the base plate 8 can be moved to engage with the positioning rods 7. The first fastening bolt 10 is then tightened to compress and fix the limiting plate 9. Finally, two U-shaped retainers 22 are attached to the left and right sides of the PVDF plastic control valve body 1, and the second fastening bolt 23 is tightened to lock the U-shaped retainers. 22. Then, tighten the two positioning bolts 20 respectively, so that the positioning bolts 20 drive the round seat 21 to engage with the round groove 24 of the U-shaped bracket 22, so as to further assemble the positioning PVDF plastic control valve. This snap-fit ​​method can conveniently and firmly assemble the PVDF plastic control valve, ensuring the stability of the PVDF plastic control valve and realizing the control of the water return of the water heater. At the same time, the connecting plate 26 is snapped onto the top of the U-shaped bracket 6. The connecting plate 26 can drive the sealing cover 27 to be fixed above the reinforcing bolt 3, so that the sealing cover 27 can play a waterproof role, preventing the reinforcing bolt 3 from rusting when exposed to water, and improving the efficiency of PVDF plastic control valve assembly and disassembly.

[0036] Rotating the operating handwheel 18 drives the cam rod 17 to rotate, allowing the top of the cam rod 17 to rotate upwards. At this point, the cam rod 17 can continuously press against the base 15, so that the cam rod 17 is engaged with the interior of the base 15. This allows the telescopic top plate 13, which is equipped with the connecting spring 16, to move upwards. In this way, the two protrusions 14 at the telescopic top plate 13 are engaged with the valve stem handwheel 5 to limit and fix the valve stem handwheel 5, preventing accidental activation of the valve stem handwheel 5 and rotation of the PVDF plastic control valve. This ensures that the entire PVDF plastic control valve can stably and safely deliver the water return water from the water heater.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A PVDF plastic control valve for backflow of a water heater, comprising a PVDF plastic control valve main body (1), characterized in that: The upper side of the PVDF plastic control valve body (1) is fixedly provided with a valve cover (2), the upper side of the valve cover (2) is threadedly provided with an array of reinforcing bolts (3), the outer surface of the reinforcing bolt (3) is threadedly connected with a positioning nut (4), and the upper side of the valve cover (2) is rotatably provided with a valve stem hand wheel (5). The two ends of the PVDF plastic control valve body (1) and the valve cover (2) are clamped with U-shaped clamping bases (6), the upper sides of the two U-shaped clamping bases (6) are clamped with positioning insertion rods (7), the lower sides of the two U-shaped clamping bases (6) are fixedly provided with bottom plates (8), the interiors of the two bottom plates (8) are clamped with limiting clamping plates (9) for fixing the positioning insertion rods (7), the lower sides of the two bottom plates (8) are threadedly connected with first fastening bolts (10) for fixing the limiting clamping plates (9), the upper sides of the two U-shaped clamping bases (6) are clamped with two connecting plates (26), and the lower sides of the four connecting plates (26) are fixedly provided with sealing covers (27) for protecting the reinforcing bolts (3).

2. A PVDF plastic control valve for backflow of a water heater according to claim 1, characterized in that, The outer surface of the PVDF plastic control valve body (1) is fixedly connected with an L-shaped plate (12), the upper side of the L-shaped plate (12) is slidably connected with a telescopic top plate (13), the right side of the telescopic top plate (13) is fixedly connected with two lug plates (14) for positioning the valve stem hand wheel (5), the telescopic top plate (13) and the L-shaped plate (12) are fixedly connected with a connecting spring (16), and the lower side of the telescopic top plate (13) penetrates through the L-shaped plate (12) and extends to the top end inside the L-shaped plate (12).

3. A PVDF plastic control valve for backflow of a water heater according to claim 2, characterized in that, The lower side of the telescopic top plate (13) is fixedly provided with a base (15), one side of the L-shaped plate (12) is rotatably connected with a cam rotating rod (17), one side of the cam rotating rod (17) penetrates through the L-shaped plate (12) and extends to the other side of the L-shaped plate (12), and the left side of the cam rotating rod (17) is fixedly connected with an operation hand wheel (18).

4. A PVDF plastic control valve for backflow of a water heater according to claim 2, characterized in that, The two sides of the PVDF plastic control valve body (1) and the valve cover (2) are clamped with two U-shaped clamps (22), the lower sides of the two U-shaped clamps (22) are threadedly connected with second fastening bolts (23) for fixing the U-shaped clamps (22), the upper sides of the second fastening bolts (23) penetrate through the U-shaped clamping bases (6) and extend to the interior of the PVDF plastic control valve body (1), the outer surface of the PVDF plastic control valve body (1) is fixedly connected with a vertical plate (19), the interiors of the L-shaped plate (12) and the vertical plate (19) are threadedly connected with positioning bolts (20), the inner sides of the two positioning bolts (20) are fixedly provided with circular seats (21), one side of each of the two U-shaped clamps (22) is provided with a circular groove (24), and the circular seat (21) is located in the interior of the circular groove (24).

5. The PVDF plastic control valve for backflow of a water heater according to claim 1, characterized in that, The lower side of the reinforcing bolt (3) penetrates the valve cover (2) and extends to one side of the PVDF plastic control valve body (1), the lower side of the positioning plug rod (7) penetrates the PVDF plastic control valve body (1) and the valve cover (2) and extends to the lower side of the U-shaped clamping seat (6), one side of the limiting clamping plate (9) penetrates the positioning plug rod (7) and extends to one side of the positioning plug rod (7), and the outer surface of the PVDF plastic control valve body (1) is fixedly connected with two reinforcing plates (11) which are symmetrically arranged.

6. A PVDF plastic control valve for backflow of a water heater according to claim 3, characterized in that, The lower side of the base (15) is provided with a groove (25), the groove (25) is matched with the cam rotating rod (17), and the top of the cam rotating rod (17) is clamped with the lower side of the base (15) through the groove (25).

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