Four eccentric frictionless wedge-tight butterfly valve

Abstract

The present invention discloses a four-eccentric frictionless wedge-tightening butterfly valve, comprising a main valve body, the main valve body comprising a water inlet end and a water outlet end, a filter screen is slidably inserted into the water inlet end of the main valve body, a fixing plug is fixedly connected to the bottom of the filter screen, one end of the fixing plug penetrates the inner wall of the main valve body and extends outward, one end of the fixing plug is threadedly connected to a locking screw, and a locking groove corresponding to the locking screw is provided on the outer wall of the main valve body; the output end of the main valve body is provided with two symmetrically arranged baffles, the baffles are rotatably connected to the inner wall of the main valve body through a rotating shaft, and a rotating rod is slidably inserted into the inner top of the main valve body. In the present invention, the friction between the butterfly valve and the main valve body is reduced by setting a lifting disc plate and a filtering mechanism, and the sealing of the valve body is enhanced, thereby improving the use effect and application scope of the butterfly valve.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a four-eccentric frictionless wedge-tightening butterfly valve. Background Art

[0002] Valves are pipe accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems, with functions such as shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion, or overflow pressure relief. Valves used in fluid control systems, from the simplest shut-off valves to various valves used in extremely complex automatic control systems, have a wide variety of varieties and specifications. Among them, the structure of metal-sealed butterfly valves is more representative of the three-eccentric structure, which is generally composed of a valve body, a valve seat, a butterfly plate, a valve stem, and a transmission mechanism. It has the advantages of large sealing pressure ratio and easy and flexible opening.

[0003] However, the existing butterfly valve has a relatively simple internal structure. When the butterfly valve is opened and closed, the friction between the disc plate and the inner wall of the valve body is relatively large, and the sealing performance is poor. At the same time, there is a lack of filtering mechanism in the butterfly valve, which affects the use effect and application scope of the butterfly valve. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] The purpose of the present invention is to solve the problems in the prior art that when the butterfly valve is opened and closed, the friction between the disc plate and the inner wall of the valve body is large, the sealing is poor, and there is a lack of a filtering mechanism in the butterfly valve, and a four-eccentric frictionless wedge-tightening butterfly valve is proposed.

[0006] 2. Technical solution

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A four-eccentric frictionless wedge-tightening butterfly valve, comprising a main valve body, the main valve body comprising a water inlet end and a water outlet end, a filter screen being slidably inserted into the water inlet end of the main valve body, a fixing plug being fixedly connected to the bottom of the filter screen, one end of the fixing plug penetrating the inner wall of the main valve body and extending outward, one end of the fixing plug being threadedly connected to a locking screw, and a locking groove corresponding to the locking screw being provided on the outer wall of the main valve body;

[0009] The output end of the main valve body is provided with two symmetrically arranged baffles, the baffles are rotatably connected to the inner wall of the main valve body through a rotating shaft, a rotating rod is slidably inserted into the inner top of the main valve body, a knob is fixedly connected to the top of the rotating rod, a guide rod is slidably inserted into one end of the knob, a slider is fixedly connected to the bottom of the guide rod, an annular slide rail corresponding to the guide rod is surrounded by the top of the main valve body, a first spring is sleeved on the guide rod, and the two ends of the first spring are respectively fixedly connected to the knob and the slider;

[0010] One end of the rotating rod is located in the main valve body and is fixedly connected to a limit plate, the bottom of the limit plate is fixedly connected to a disc plate, the edge of the disc plate is in contact with the inner wall of the main valve body, the bottom of the disc plate is fixedly connected to a support rod, the inner bottom of the main valve body is provided with a sliding cavity corresponding to the support rod, one end of the support rod located in the sliding cavity is fixedly connected to a limit block, a clamping rod is slidably inserted on the inner wall of the sliding cavity, a clamping groove corresponding to the clamping rod is provided on the support rod, one end of the clamping rod passes through the inner wall of the sliding cavity and is fixedly connected to a pull rod, and the end of the clamping rod away from the pull rod is fixedly sleeved with a clamping sleeve.

[0011] Preferably, one end of the filter screen away from the fixing plug is fixedly sleeved with a limiting sleeve.

[0012] Preferably, a first sealing ring is slidably sleeved on the filter screen, and one side of the first sealing ring is fixedly connected to the inner bottom of the main valve body.

[0013] Preferably, a second spring is sleeved on the clamping rod, and two ends of the second spring are fixedly connected to the clamping sleeve and the inner wall of the sliding cavity respectively.

[0014] Preferably, a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively fixedly connected to the baffle and the inner wall of the main valve body.

[0015] Preferably, a sliding opening corresponding to the rotating rod is provided at the inner top of the main valve body, and a plurality of steel balls are slidably connected in the sliding opening, and the edges of the steel balls are in contact with the rotating rod.

[0016] Preferably, a clamping block is fixedly connected to the top of the guide rod.

[0017] Preferably, a second sealing ring is slidably sleeved on the rotating rod, and one side of the second sealing ring is fixedly connected to the top of the main valve body.

[0018] Preferably, a plurality of locking blocks are fixedly connected to the outer wall of the main valve body, and the locking blocks are provided with locking openings.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) In the present invention, when the butterfly valve needs to be opened, the knob is first used to drive the rotating rod to rise, so that the disc plate falls off from the sliding cavity, and then the knob is turned to drive the rotating rod to rotate, thereby driving the disc plate to rotate, so that water can pass through. At the same time, the filter screen can play a certain filtering role on the water flow. At the same time, the guide rod can effectively prevent the knob from shaking, and the slider can prevent the guide rod from falling off the annular slide rail. In the present invention, the friction between the butterfly valve and the main valve body is reduced by setting the lifting disc plate and the filtering mechanism, and at the same time, the sealing of the valve body is enhanced, thereby improving the use effect and application range of the butterfly valve.

[0022] (2) When the valve body needs to be closed, the disc plate will fall into the sliding cavity. At the same time, the clamping rod is driven by the elastic traction of the second spring to fix the support rod. At the same time, the clamping sleeve can effectively prevent the clamping rod from falling off from the sliding cavity.

[0023] (3) When the filter needs to be cleaned, first unscrew the locking screw, and then pull out the filter through the fixing plug. At the same time, the setting of the first sealing ring and the second sealing ring can enhance the sealing of the valve body, and the steel ball can reduce the friction between the rotating rod and the inner wall of the sliding port. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic side view of the structure of a four-eccentric frictionless wedge-tightening butterfly valve proposed by the present invention;

[0025] Figure 2 It is a front view structural schematic diagram of the disc plate of the four-eccentric frictionless wedge-tightening butterfly valve proposed by the present invention;

[0026] Figure 3 It is a schematic diagram of the top view of the main valve body of the four-eccentric frictionless wedge-tightening butterfly valve proposed by the present invention;

[0027] Figure 4 for Figure 1 Schematic diagram of the structure at point A.

[0028] In the figure: 1 main valve body, 2 filter screen, 3 fixing plug, 4 locking screw, 5 baffle, 6 rotating shaft, 7 rotating rod, 8 knob, 9 guide rod, 10 slider, 11 first spring, 12 limit plate, 13 disc plate, 14 support rod, 15 limit block, 16 clamping rod, 17 pull rod, 18 clamping sleeve, 19 limit sleeve, 20 first sealing ring, 21 second spring, 22 steel ball, 23 sliding mouth, 24 sliding cavity, 25 clamping block, 26 second sealing ring, 27 locking block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Embodiment 1:

[0031] Reference Figure 1-4 A four-eccentric frictionless wedge-tightening butterfly valve comprises a main valve body 1, the main valve body 1 comprises a water inlet end and a water outlet end, a filter screen 2 is slidably inserted into the water inlet end of the main valve body 1 for filtering water, a fixing plug 3 is fixedly connected to the bottom of the filter screen 2 for fixing the filter screen 2, one end of the fixing plug 3 penetrates the inner wall of the main valve body 1 and extends outward, one end of the fixing plug 3 is threadedly connected to a locking screw 4 for fixing the fixing plug 3, and a locking groove corresponding to the locking screw 4 is provided on the outer wall of the main valve body 1;

[0032] In this embodiment, the output end of the main valve body 1 is provided with two symmetrically arranged baffles 5 to prevent water from flowing back. The baffle 5 is rotatably connected to the inner wall of the main valve body 1 through a rotating shaft 6. A rotating rod 7 is slidably inserted into the inner top of the main valve body 1 to drive the disc 13 to move. A knob 8 is fixedly connected to the top of the rotating rod 7 to drive the rotating rod 7 to rotate. A guide rod 9 is slidably inserted into one end of the knob 8 to prevent the knob 8 from shaking. A slider 10 is fixedly connected to the bottom of the guide rod 9 to prevent the guide rod 9 from falling off the annular slide rail. An annular slide rail corresponding to the guide rod 9 is arranged around the top of the main valve body 1. A first spring 11 is sleeved on the guide rod 9 to provide a certain elastic support for the knob 8. The two ends of the first spring 11 are fixedly connected to the knob 8 and the slider 10 respectively.

[0033] In this embodiment, one end of the rotating rod 7 located in the main valve body 1 is fixedly connected to the limit plate 12 to prevent the rotating rod 7 from rising too high. The bottom of the limit plate 12 is fixedly connected to the disc plate 13 for controlling the water flow rate. The edge of the disc plate 13 contacts the inner wall of the main valve body 1. The bottom of the disc plate 13 is fixedly connected to a support rod 14 for supporting the disc plate 13. The inner bottom of the main valve body 1 is provided with a sliding cavity 24 corresponding to the support rod 14. One end of the support rod 14 located in the sliding cavity 24 is fixedly connected to a limiting block 15 to prevent the support rod 14 from falling off from the sliding cavity 24. A clamping rod 16 is slidably inserted on the inner wall of the sliding cavity 24 for fixing the support rod 14. The support rod 14 is provided with a clamping groove corresponding to the clamping rod 16. One end of the clamping rod 16 passes through the inner wall of the sliding cavity 24 and is fixedly connected to a pull rod 17 for convenient pulling of the clamping rod 16. The end of the clamping rod 16 away from the pull rod 17 is fixedly sleeved with a clamping sleeve 18.

[0034] In this embodiment, one end of the filter screen 2 away from the fixed plug 3 is fixedly sleeved with a limiting sleeve 19 to prevent the filter screen 2 from falling off, and a first sealing ring 20 is slidably sleeved on the filter screen 2, and one side of the first sealing ring 20 is fixedly connected to the inner bottom of the main valve body 1 to prevent water from leaking out. A second spring 21 is sleeved on the clamping rod 16, and the two ends of the second spring 21 are respectively fixedly connected to the clamping sleeve 18 and the inner wall of the sliding cavity 24, which is used to provide a certain elastic support for the clamping rod 16. A torsion spring is sleeved on the rotating shaft 6, and the two ends of the torsion spring are respectively fixedly connected to the baffle 5 and the inner wall of the main valve body 1, which is used to It provides certain torsional support for the baffle 5. A sliding mouth 23 corresponding to the rotating rod 7 is provided on the inner top of the main valve body 1. A plurality of steel balls 22 are slidably connected in the sliding mouth 23. The edge of the steel ball 22 contacts the rotating rod 7 to reduce the friction between the rotating rod 7 and the inner wall of the sliding mouth. A clamping block 25 is fixedly connected to the top of the guide rod 9. A second sealing ring 26 is slidably sleeved on the rotating rod 7. One side of the second sealing ring 26 is fixedly connected to the top of the main valve body 1 to prevent water leakage. A plurality of locking blocks 27 are fixedly connected to the outer wall of the main valve body 1. The locking block 27 is provided with a locking mouth to facilitate fixing the valve body.

[0035] In this embodiment, when the butterfly valve needs to be opened, the rotating rod 7 is first driven to rise by the knob 8, so that the disc plate 13 falls off from the sliding cavity 24, and then the knob 8 is turned to drive the rotating rod 7 to rotate, thereby driving the disc plate 13 to rotate, so that the water flow can pass through. At the same time, the filter screen 2 can play a certain filtering mechanism for the water flow. At the same time, the guide rod 9 can effectively prevent the knob 8 from shaking, and the slider 10 can prevent the guide rod 9 from falling off from the annular slide rail. At the same time, when the valve body needs to be closed, the disc plate 13 will fall into the sliding cavity 24, and at the same time, the clamping rod 16 drives the clamping rod 16 to fix the support rod 14 under the elastic traction of the second spring 21, and the clamping sleeve 18 can effectively prevent the clamping rod 16 from falling off from the sliding cavity 24. When the filter screen 2 needs to be cleaned, the locking screw 4 is first unscrewed, and then the filter screen 2 is pulled out through the fixing plug 3. At the same time, the first sealing ring 20 and the second sealing ring 26 are set to enhance the sealing performance of the valve body, and the steel ball 22 can reduce the friction between the rotating rod 7 and the inner wall of the sliding port 23.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A four-eccentric frictionless wedge-tightening butterfly valve, comprising a main valve body (1), characterized in that: The main valve body (1) comprises a water inlet end and a water outlet end, a filter screen (2) is slidably inserted into the water inlet end of the main valve body (1), a fixing plug (3) is fixedly connected to the bottom of the filter screen (2), one end of the fixing plug (3) penetrates the inner wall of the main valve body (1) and extends outwards, one end of the fixing plug (3) is threadedly connected to a locking screw (4), and a locking groove corresponding to the locking screw (4) is provided on the outer wall of the main valve body (1); The output end of the main valve body (1) is provided with two symmetrically arranged baffles (5), the baffles (5) are rotatably connected to the inner wall of the main valve body (1) via a rotating shaft (6), a rotating rod (7) is slidably inserted into the inner top of the main valve body (1), a knob (8) is fixedly connected to the top of the rotating rod (7), a guide rod (9) is slidably inserted into one end of the knob (8), a slider (10) is fixedly connected to the bottom of the guide rod (9), an annular slide rail corresponding to the guide rod (9) is arranged around the top of the main valve body (1), a first spring (11) is sleeved on the guide rod (9), and the two ends of the first spring (11) are respectively fixedly connected to the knob (8) and the slider (10); One end of the rotating rod (7) located in the main valve body (1) is fixedly connected to the limit plate (12), the bottom of the limit plate (12) is fixedly connected to the disc plate (13), the edge of the disc plate (13) is in contact with the inner wall of the main valve body (1), the bottom of the disc plate (13) is fixedly connected to the support rod (14), the inner bottom of the main valve body (1) is provided with a sliding cavity (24) corresponding to the support rod (14), one end of the support rod (14) located in the sliding cavity (24) is fixedly connected to the limit block (15), a clamping rod (16) is slidably inserted on the inner wall of the sliding cavity (24), the support rod (14) is provided with a clamping groove corresponding to the clamping rod (16), one end of the clamping rod (16) passes through the inner wall of the sliding cavity (24) and is fixedly connected to the pull rod (17), and one end of the clamping rod (16) away from the pull rod (17) is fixedly sleeved with a clamping sleeve (18).

2. The four-eccentric frictionless wedge-tightening butterfly valve according to claim 1 is characterized in that: One end of the filter screen (2) away from the fixing plug (3) is fixedly sleeved with a limiting sleeve (19).

3. The four-eccentric frictionless wedge-tightening butterfly valve according to claim 1 is characterized in that: A first sealing ring (20) is slidably sleeved on the filter screen (2), and one side of the first sealing ring (20) is fixedly connected to the inner bottom of the main valve body (1).

4. The four-eccentric frictionless wedge-tightening butterfly valve according to claim 1 is characterized in that: The clamping rod (16) is sleeved with a second spring (21), and two ends of the second spring (21) are respectively fixedly connected to the clamping sleeve (18) and the inner wall of the sliding cavity (24).

5. The four-eccentric frictionless wedge-tightening butterfly valve according to claim 1 is characterized in that: The rotating shaft (6) is sleeved with a torsion spring, and the two ends of the torsion spring are respectively fixedly connected to the baffle (5) and the inner wall of the main valve body (1).

6. The four-eccentric frictionless wedge-tightening butterfly valve according to claim 1 is characterized in that: The inner top of the main valve body (1) is provided with a sliding opening (23) corresponding to the rotating rod (7), and a plurality of steel balls (22) are slidably connected in the sliding opening (23), and the edges of the steel balls (22) are in contact with the rotating rod (7).

7. The four-eccentric frictionless wedge-tightening butterfly valve according to claim 1 is characterized in that: A clamping block (25) is fixedly connected to the top of the guide rod (9).

8. The four-eccentric frictionless wedge-tightening butterfly valve according to claim 1 is characterized in that: A second sealing ring (26) is slidably sleeved on the rotating rod (7), and one side of the second sealing ring (26) is fixedly connected to the top of the main valve body (1).

9. The four-eccentric frictionless wedge-tightening butterfly valve according to claim 1 is characterized in that: A plurality of locking blocks (27) are fixedly connected to the outer wall of the main valve body (1), and a locking opening is provided on the locking block (27).

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