Novel stuffing box butterfly valve

Abstract

The utility model relates to a novel stuffing box butterfly valve which comprises a valve body, a valve rod is arranged in the valve body, a stuffing box body is fixed to the outer side of the upper end of the valve body, a manual device is arranged on the upper surface of the stuffing box body, and a defrosting mechanism used for increasing the temperature is arranged on the left side of the stuffing box body. Sealing mechanisms used for improving the sealing performance are arranged on the upper surface and the lower surface of the stuffing box body, and the thawing mechanism comprises a heating box fixed to the left side of the stuffing box body. According to the novel stuffing box butterfly valve, the defrosting mechanism monitors the external temperature in real time through the temperature sensor, when the external temperature reaches the temperature at which liquid drops can be frozen, the driving motor is started, and meanwhile the heating pipe heats air; and heated hot air is blown to the valve body through cooperation of the driving motor, the rotating shaft, the fan blades and the air guiding box, so that the temperature of the valve body is increased to the temperature at which liquid drops cannot be frozen, and the problem that the butterfly valve is out of action due to the fact that a valve plate of the butterfly valve is frozen and cannot rotate is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a novel stuffing box butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve whose closing member (valve disc or butterfly plate) is a disc, which rotates around the valve axis to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a cutting and throttling role in the pipeline. The butterfly valve opening and closing member is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulation.

[0003] For example, Chinese patent CN214367827U discloses a highly adaptable bidirectional sealing butterfly valve, including a valve body, a butterfly plate is rotatably mounted inside the valve body, a valve stem is fixedly mounted on the butterfly plate, and the valve stem is rotatably extended out of the valve body in the extension direction; a stuffing box is provided on the upper part of the valve stem, and a manual device is fixedly mounted on the top of the stuffing box; a valve seat is frictionally connected to one side of the butterfly plate, the valve seat is fixedly clamped on the fixing part, the fixing part is coaxially fixedly mounted in the valve body, a screw is fastened on one side of the fixing part, a pressing part is frictionally mounted in the screw, and the cooperation between the butterfly plate and the valve seat can ensure the overall sealing of the valve; the valve seat is clamped in the fixing part and then fastened and installed by screws, which is convenient for the replacement and maintenance of the valve seat after the valve seat is worn in the later stage; at the same time, the sealing ring at the screw connection can ensure the sealing of the screw hole, and the pressing part can seal the connection between the valve seat and the fixing part, and at the same time, the supporting part can support the edge of the valve seat.

[0004] The above patent still has certain defects. The butterfly valve needs to be connected to a pipeline when in use, through which various liquids are transported, and water is often transported. The temperature will drop significantly in cold weather, and water flow will easily freeze into ice in low temperature weather, especially non-flowing water will more easily condense into ice. The droplets attached to the valve plate fan inside the butterfly valve will condense into ice more easily, causing the valve plate to be unable to rotate, and then causing the butterfly valve to be unable to open and close. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a novel stuffing box butterfly valve, which has the advantages of preventing the butterfly plate inside the butterfly valve from condensing into ice, and solves the problem that droplets attached to the valve plate fan inside the butterfly valve are more likely to condense into ice, resulting in the valve plate being unable to rotate.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel stuffing box butterfly valve, comprising a valve body, a valve stem is arranged inside the valve body, a stuffing box body is fixed to the outer side of the upper end of the valve body, a manual device is arranged on the upper surface of the stuffing box body, a thawing mechanism for increasing the temperature is arranged on the left side of the stuffing box body, and a sealing mechanism for improving the sealing performance is arranged on the upper and lower surfaces of the stuffing box body;

[0007] The thawing mechanism includes a heating box fixed to the left side of the stuffing box body, a driving box fixed to the upper surface of the heating box, a driving motor fixed to the top wall of the inner cavity of the driving box, a rotating shaft rotatably connected to the inside of the heating box fixed to the outer side of the output shaft of the driving motor, fan blades fixed to the outer side of the rotating shaft, two dustproof nets fixed to the inside of the heating box, no less than two heating tubes fixed to the left side wall of the inner cavity of the heating box, an air guide box fixed to the lower surface of the heating box, and a temperature sensor located on the right side of the air guide box fixed to the lower surface of the stuffing box body.

[0008] Furthermore, a ventilation hole is provided on the upper surface of the heating box, and the dustproof net is fixed inside the ventilation hole.

[0009] Furthermore, a mounting groove is provided on the top wall of the inner cavity of the heating box, a bearing is fixed inside the mounting groove, and the rotating shaft is fixed inside the bearing.

[0010] Furthermore, the cross-section of the air guide box is in the shape of a parallelogram, and the heating box is in the shape of a rectangular parallelepiped which is hollow inside and has a missing lower surface.

[0011] Furthermore, the sealing mechanism includes two connecting blocks respectively fixed on the upper surface and lower surface of the stuffing box body, the interiors of the two connecting blocks are threadedly connected with connecting screws, the outer sides of the two connecting screws are threadedly connected with sealing plates, and the left side wall of the inner cavity of the stuffing box body is fixed with no less than two sealing springs, and a movable plate is fixed to the right side of the no less than two sealing springs, and a sealing gasket is fixed to the movable plate.

[0012] Furthermore, a sealing hole for the sealing gasket to pass through is opened on the right side of the stuffing box body, and the sealing hole of the sealing gasket is gap-matched with the stuffing box body, and a movable groove for the movable plate to slide and connect is opened inside the stuffing box body.

[0013] Furthermore, a threaded hole for a connecting screw to pass through is provided on the right side of the sealing plate, and the connecting screw is threadedly connected to the sealing plate through the threaded hole, and a threaded groove for a connecting screw to be threadedly connected is provided on the right side of the connecting block.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. The defrosting mechanism of the new stuffing box butterfly valve monitors the outside temperature in real time through the temperature sensor. When the outside temperature reaches the temperature that can freeze the droplets, the driving motor is started, and the heating tube heats the air temperature at the same time. The driving motor, the rotating shaft, the fan blades and the air guide box cooperate to blow the heated hot air to the valve body to raise its temperature to a temperature at which the droplets cannot freeze, thereby avoiding the problem that the valve plate of the butterfly valve is frozen and cannot rotate, causing the butterfly valve to lose its function.

[0016] 2. This new stuffing box butterfly valve seals the stuffing port of the stuffing box body through the cooperation of the sealing plate, sealing gasket, sealing spring and movable plate under the action of the sealing mechanism, preventing external gas or droplets from penetrating into the interior of the stuffing box body, and also preventing the material in the stuffing box body from leaking out. At the same time, the sealing plate is locked by the connecting block and connecting screws to prevent the sealing plate from detaching from the stuffing box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the thawing mechanism of the utility model;

[0019] Figure 3 It is a schematic diagram of the sealing mechanism of the utility model.

[0020] In the figure: 1 thawing mechanism, 101 air guide box, 102 temperature sensor, 103 driving motor, 104 driving box, 105 dust screen, 106 rotating shaft, 107 fan blade, 108 heating box, 109 heating tube, 2 valve body, 3 valve stem, 4 sealing mechanism, 401 sealing plate, 402 sealing gasket, 403 connecting block, 404 sealing spring, 405 movable plate, 406 connecting screw, 5 stuffing box body, 6 manual device. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1A new type of stuffing box butterfly valve in this embodiment includes a valve body 2, a valve stem 3 is arranged inside the valve body 2, a stuffing box body 5 is fixed to the outer side of the upper end of the valve body 2, a manual device 6 is arranged on the upper surface of the stuffing box body 5, a thawing mechanism 1 for increasing the temperature is arranged on the left side of the stuffing box body 5, and a sealing mechanism 4 for improving the sealing performance is arranged on the upper and lower surfaces of the stuffing box body 5. The electrical components appearing in the text are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not repeated in the text.

[0023] See also Figure 2 In order to prevent the valve plate of the butterfly valve from freezing, the thawing mechanism 1 in this embodiment includes a heating box 108 fixed to the left side of the stuffing box body 5, a driving box 104 is fixed to the upper surface of the heating box 108, a driving motor 103 is fixed to the top wall of the inner cavity of the driving box 104, a rotating shaft 106 rotatably connected to the inside of the heating box 108 is fixed to the outside of the output shaft of the driving motor 103, a fan blade 107 is fixed to the outside of the rotating shaft 106, two dustproof nets 105 are fixed to the inside of the heating box 108, dust is prevented from entering the inside of the heating box 108 by the dustproof nets 105, no less than two heating tubes 109 are fixed to the left side wall of the inner cavity of the heating box 108, an air guide box 101 is fixed to the lower surface of the heating box 108, and a temperature sensor 102 located on the right side of the air guide box 101 is fixed to the lower surface of the stuffing box body 5, and the model of the temperature sensor 102 is TR / 02010.

[0024] The driving motor 103 drives the rotating shaft 106 to rotate through the output shaft, and drives the fan blades 107 to rotate through the rotating shaft 106. The fan blades 107 rotate and drive the air to pass through the dustproof net 105 into the interior of the heating box 108. The heating tube 109 heats the air in the heating box 108 to increase its temperature. The fan blades 107 blow the heated air to the air guide box 101 and guide the heated air to the valve body 2 through the air guide box 101, thereby heating the valve body 2 to prevent the valve body 2 from freezing into ice.

[0025] In this embodiment, a ventilation hole is provided on the upper surface of the heating box 108, and the dustproof net 105 is fixed inside the ventilation hole. A mounting groove is provided on the top wall of the inner cavity of the heating box 108, and a bearing is fixed inside the mounting groove. The rotating shaft 106 is fixed inside the bearing. The cross-section of the air guide box 101 is in the shape of a parallelogram, and the inclined surface of the air guide box 101 is inclined toward the side close to the valve body 2. The shape of the heating box 108 is a rectangular parallelepiped with a hollow interior and a missing lower surface. The control method of this application is controlled by a controller, and the control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field, and this application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.

[0026] It should be noted that the thawing mechanism 1 monitors the external temperature in real time through the temperature sensor 102. When the external temperature reaches a temperature that can freeze the droplets, the driving motor is started. At the same time, the heating tube 109 heats the air temperature, and the driving motor 103, the rotating shaft 106, the fan blades 107 and the air guide box 101 cooperate to blow the heated hot air toward the valve body 2 to raise its temperature to a temperature at which the droplets cannot freeze.

[0027] See also Figure 3 In order to prevent the stuffing in the stuffing box from leaking out, the sealing mechanism 4 in this embodiment includes two connecting blocks 403 respectively fixed on the upper surface and the lower surface of the stuffing box body 5, the interiors of the two connecting blocks 403 are threadedly connected with connecting screws 406, the outer sides of the two connecting screws 406 are threadedly connected with a sealing plate 401, and the left side wall of the inner cavity of the stuffing box body 5 is fixed with no less than two sealing springs 404, and a movable plate 405 is fixed to the right side of no less than two sealing springs 404, and a sealing gasket 402 is fixed to the movable plate 405.

[0028] In this embodiment, a sealing hole for the sealing gasket 402 to pass through is opened on the right side of the stuffing box body 5, and the sealing hole of the sealing gasket 402 through the hole is loosely matched with the stuffing box body 5, and a movable groove for the movable plate 405 to slide and connect is opened inside the stuffing box body 5, and the sealing spring 404 is compressed to generate a rebound force to push the sealing gasket 402 to the right through the movable plate 405, so that the sealing gasket 402 is slightly deformed during the pushing and fits tightly with the sealing plate 401, so that the deformed sealing gasket 402 fits with the sealing plate 401 in a larger area and with a higher degree of precision, thereby improving the sealing performance, a threaded hole for the connecting screw 406 to pass through is opened on the right side of the sealing plate 401, and the connecting screw 406 is threadedly connected to the sealing plate 401 through the threaded hole, and a threaded groove for the connecting screw 406 to be threadedly connected is opened on the right side of the connecting block 403.

[0029] It should be noted that the sealing mechanism 4 seals the filling port of the stuffing box body 5 through the cooperation of the sealing plate 401, the sealing gasket 402, the sealing spring 404 and the movable plate 405 to prevent external gas or droplets from penetrating into the interior of the stuffing box body 5, and also prevent the material in the stuffing box body 5 from leaking out.

[0030] The working principle of the above embodiment is:

[0031] (1) When the temperature sensor 102 detects that the outside temperature is lower than the set temperature, the drive motor 103 and the heating tube 109 are started. The drive motor 103 drives the shaft 106 to rotate through the output shaft, and drives the fan blades 107 to rotate through the shaft 106. The fan blades 107 rotate while driving the air to pass through the dustproof net 105 and enter the interior of the heating box 108. The heating tube 109 heats the air in the heating box 108 to increase its temperature. The fan blades 107 blow the heated air into the interior of the air guide box 101. At the same time, the air guide box 101 guides the heated air to the interior of the heating box 108. Towards the valve body 2, the valve body 2 gradually heats up under the blowing of hot air, thereby increasing the temperature inside the valve body 2, and further making it impossible for the water flowing through the valve body 2 and the residual droplets to freeze. The thawing mechanism 1 monitors the external temperature in real time through the temperature sensor 102. When the external temperature reaches the temperature that can freeze the droplets, the driving motor is started, and the heating tube 109 heats the air temperature at the same time. The driving motor 103, the rotating shaft 106, the fan blades 107 and the air guide box 101 cooperate to blow the heated hot air toward the valve body 2 to raise its temperature to a temperature that cannot freeze the droplets.

[0032] (2) After the stuffing box body 5 is filled with material, the sealing plate 401 is covered and the sealing plate 401 and the connecting block 403 are connected together by connecting screws 406, so that the sealing plate 401 and the stuffing box body 5 fit tightly. At this time, the sealing gasket 402 is pushed to the left, and the sealing gasket 402 drives the movable plate 405 to move to the left and compress the sealing spring 404. The sealing spring 404 is compressed to generate a rebound force to push the sealing gasket 402 to the right through the movable plate 405, so that the sealing gasket 402 is slightly deformed during the pushing and fits tightly to the sealing plate 401. The sealing mechanism 4 seals the filling port of the stuffing box body 5 through the cooperation of the sealing plate 401, the sealing gasket 402, the sealing spring 404 and the movable plate 405, so as to prevent external gas or liquid droplets from penetrating into the interior of the stuffing box body 5, and also prevent the material in the stuffing box body 5 from leaking out.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A novel stuffing box butterfly valve, comprising a valve body (2), characterized in that: A valve stem (3) is provided inside the valve body (2); a stuffing box body (5) is fixed to the outer side of the upper end of the valve body (2); a manual device (6) is provided on the upper surface of the stuffing box body (5); a thawing mechanism (1) for increasing the temperature is provided on the left side of the stuffing box body (5); and a sealing mechanism (4) for improving the sealing performance is provided on the upper and lower surfaces of the stuffing box body (5); The thawing mechanism (1) comprises a heating box (108) fixed on the left side of a stuffing box body (5), a driving box (104) fixed on the upper surface of the heating box (108), a driving motor (103) fixed on the top wall of the inner cavity of the driving box (104), a rotating shaft (106) rotatably connected to the inside of the heating box (108) fixed on the outer side of the output shaft of the driving motor (103), a fan blade (107) fixed on the outer side of the rotating shaft (106), two dustproof nets (105) fixed inside the heating box (108), no less than two heating tubes (109) fixed on the left side wall of the inner cavity of the heating box (108), an air guide box (101) fixed on the lower surface of the heating box (108), and a temperature sensor (102) located on the right side of the air guide box (101) fixed on the lower surface of the stuffing box body (5).

2. A new type of stuffing box butterfly valve according to claim 1, characterized in that: A ventilation hole is provided on the upper surface of the heating box (108), and the dustproof net (105) is fixed inside the ventilation hole.

3. A new type of stuffing box butterfly valve according to claim 1, characterized in that: A mounting groove is provided on the top wall of the inner cavity of the heating box (108), a bearing is fixed inside the mounting groove, and the rotating shaft (106) is fixed inside the bearing.

4. A new type of stuffing box butterfly valve according to claim 1, characterized in that: The cross-section of the air guide box (101) is in the shape of a parallelogram, and the heating box (108) is in the shape of a rectangular parallelepiped with a hollow interior and a missing lower surface.

5. A new type of stuffing box butterfly valve according to claim 1, characterized in that: The sealing mechanism (4) comprises two connecting blocks (403) respectively fixed on the upper surface and the lower surface of the stuffing box body (5); the interiors of the two connecting blocks (403) are both threadedly connected with connecting screws (406); the outer sides of the two connecting screws (406) are threadedly connected with sealing plates (401); the left side wall of the inner cavity of the stuffing box body (5) is fixed with at least two sealing springs (404); the right side of the at least two sealing springs (404) is fixed with a movable plate (405); and the movable plate (405) is fixed with a sealing gasket (402).

6. A new type of stuffing box butterfly valve according to claim 5, characterized in that: A sealing hole for a sealing gasket (402) to pass through is provided on the right side of the stuffing box body (5), and the through-hole sealing hole of the sealing gasket (402) is clearance-matched with the stuffing box body (5), and a movable groove for a movable plate (405) to be slidably connected is provided inside the stuffing box body (5).

7. A new type of stuffing box butterfly valve according to claim 5, characterized in that: The right side of the sealing plate (401) is provided with a threaded hole for a connecting screw (406) to pass through, and the connecting screw (406) is threadedly connected to the sealing plate (401) through the threaded hole, and the right side of the connecting block (403) is provided with a threaded groove for the connecting screw (406) to be threadedly connected.

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