Pneumatic control valve

Abstract

The utility model discloses a pneumatic control valve, which relates to the technical field of pneumatic control valves and comprises a valve body, an air cylinder is fixedly mounted at the top end of the valve body, a sealing gasket is arranged between an upper cover and a lower cover, an air leakage pipe is fixedly mounted at the top end of the upper cover and communicated with the inside of the air cylinder, and a first sliding groove is formed in the air leakage pipe. Two second sliding grooves which are symmetrically distributed and two third sliding grooves which are symmetrically distributed are further formed in the air leakage pipe, the air leakage pipe is sleeved with a rainproof assembly, and a protection assembly is installed at the connecting position of the upper cover and the lower cover. Therefore, the rainproof assembly can be installed on the air leakage pipe through the sliding groove in the air leakage pipe, the rainproof cap can be limited through the sliding groove, the problem that the rainproof cap is prone to falling off is solved, the protection assembly is arranged, the protection assembly can effectively reduce oxidation damage caused by contact between a sealing gasket and air and rainwater, and the service life of the rainproof cap is prolonged. And the service life of the sealing gasket is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic regulating valves, in particular to a pneumatic regulating valve. Background Art

[0002] Pneumatic control valves use compressed gas as the power source and cylinders as actuators, and are driven by accessories such as valve positioners, converters, solenoid valves, position-holding valves, gas storage tanks, and gas filters to achieve switching or proportional regulation. They receive control signals from industrial automation control systems to adjust various process parameters of pipeline media, such as flow, pressure, temperature, and liquid level. The characteristics of pneumatic control valves are simple control, fast response, and inherent safety, without the need for additional explosion-proof measures.

[0003] Most of the existing rain caps on the cylinders of pneumatic control valves do not have a limiting structure, which causes the rain caps to fall off easily, allowing water and dust to enter the cylinder from the bleed pipe, causing damage to the structural parts in the cylinder. In addition, there are no protective components at the joints of the cylinders of existing pneumatic control valves, which causes the sealing gaskets at the joints of the cylinders to oxidize quickly and have a short service life. In response to the above problems, the inventors proposed a pneumatic control valve to solve the above problems. Utility Model Content

[0004] In order to solve the problems that most of the rainproof caps on the cylinders of existing pneumatic regulating valves have no limiting structure and there are no protective components at the joints of the cylinders; the purpose of the utility model is to provide a pneumatic regulating valve.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a pneumatic regulating valve, including a valve body, a cylinder fixedly installed on the top of the valve body, and the valve body is connected to the inside of the cylinder, the cylinder includes an upper cover and a lower cover, a sealing gasket is provided between the upper cover and the lower cover, a deflation pipe is fixedly installed on the top of the upper cover, and the deflation pipe is connected to the inside of the cylinder, a first slide groove is provided on the deflation pipe, and two symmetrically distributed second slide grooves and two symmetrically distributed third slide grooves are also provided on the deflation pipe, a rainproof component is provided on the deflation pipe, and a protective component is installed at the connection between the upper cover and the lower cover.

[0006] Preferably, the rainproof assembly includes a rainproof cap, and the rainproof cap is mounted on the air deflation pipe. Four spring telescopic rods distributed in a ring are fixedly installed on the bottom end of the rainproof cap. Fixed rings are fixedly installed on the bottom ends of the four spring telescopic rods, and the fixed rings are mounted on the air deflation pipe. Two symmetrically distributed blocks are fixedly installed inside the rainproof cap, and the blocks can slide in the first slide groove, the second slide groove and the third slide groove on the air deflation pipe.

[0007] Preferably, the protective assembly includes a first half ring and a second half ring, and the first half ring and the second half ring are movably installed at the joint of the upper cover and the lower cover. A fixing rod is fixedly installed on one side of the first half ring, and bidirectional screws are rotatably installed at both ends of the fixing rod, and the bidirectional screw threads are inserted in the first half ring and the second half ring.

[0008] Preferably, a rotating shaft is rotatably installed in the fixed rod, bevel gears are fixedly installed at both ends of the rotating shaft and one end of the two bidirectional screws, and the two adjacent bevel gears are meshed, a worm wheel is fixedly installed on the rotating shaft, a worm is rotatably installed in the fixed rod, and the worm wheel is meshed with the worm wheel, and a knob is fixedly installed on one end of the worm wheel.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. In the present invention, by providing a rainproof component and opening a chute on the deflation pipe, the rainproof component can be installed on the deflation pipe through the chute on the deflation pipe. The chute can also be used to limit the rainproof cap, solving the problem of the rainproof cap easily falling off.

[0011] 2. In the present invention, by providing a protective component, the protective component can effectively reduce the oxidation damage caused by the contact between the sealing gasket and air and rainwater, thereby increasing the service life of the sealing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cylinder structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the protective component of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the rainproof component of the utility model;

[0017] Figure 5 For this utility model Figure 2 A magnified schematic diagram of the structure in the middle.

[0018] In the figure: 1. Valve body; 2. Cylinder; 21. Upper cover; 22. Lower cover; 23. Vent pipe; 231. First slide; 232. Second slide; 233. Third slide; 3. Rainproof assembly; 31. Rainproof cap; 32. Fixing ring; 33. Spring telescopic rod; 34. Block; 4. Protection assembly; 41. First half ring; 42. Second half ring; 43. Bidirectional screw; 44. Knob; 45. Rotating shaft; 46. Worm gear; 47. Worm; 48. Bevel gear; 49. Fixing rod; 5. Sealing gasket. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example: Figure 1-5 As shown, the utility model provides a pneumatic regulating valve, including a valve body 1, a cylinder 2 is fixedly installed on the top of the valve body 1, and the valve body 1 is connected to the inside of the cylinder 2, the cylinder 2 includes an upper cover 21 and a lower cover 22, a sealing gasket 5 is provided between the upper cover 21 and the lower cover 22, a bleed pipe 23 is fixedly installed on the top of the upper cover 21, and the bleed pipe 23 is connected to the inside of the cylinder 2, a first chute 231 is provided on the bleed pipe 23, two symmetrically distributed second chute 232 and two symmetrically distributed third chute 233 are also provided on the bleed pipe 23, a rainproof component 3 is sleeved on the bleed pipe 23, the upper cover 21 A protective component 4 is installed at the connection with the lower cover 22. The cylinder 2 is assembled by the upper cover 21 and the lower cover 22. A sealing gasket 5 is provided at the joint between the upper cover 21 and the lower cover 22 to prevent air leakage from the cylinder 2 and prevent water and dust from entering the cylinder 2 from the joint. The rainproof component 3 on the air bleed pipe 23 can prevent water and dust from entering the cylinder 2 from the air bleed pipe 23 and causing damage to the structural parts in the cylinder 2. The protective component 4 at the joint between the upper cover 21 and the lower cover 22 can effectively reduce the oxidation damage caused by the contact between the sealing gasket 5 and the air and rainwater, thereby increasing the service life of the sealing gasket 5.

[0021] The rainproof assembly 3 includes a rainproof cap 31 , and the rainproof cap 31 is sleeved on the air release pipe 23 .

[0022] By adopting the above technical solution, the rainproof cap 31 can prevent water and dust from entering the cylinder 2 through the air vent pipe 23 and causing damage to the structural parts in the cylinder 2.

[0023] Four spring telescopic rods 33 distributed in an annular manner are fixedly installed at the bottom end of the rainproof cap 31 , and a fixing ring 32 is fixedly installed at the bottom end of the four spring telescopic rods 33 , and the fixing ring 32 is sleeved on the deflation pipe 23 .

[0024] By adopting the above technical solution, the rainproof cap 31 and the fixing ring 32 are sleeved on the deflation pipe 23 , and the rainproof cap 31 is pressed so that the rainproof cap 31 squeezes the spring telescopic rod 33 .

[0025] Two symmetrically distributed clamping blocks 34 are fixedly installed in the rain cap 31 , and the clamping blocks 34 can slide in the first sliding groove 231 , the second sliding groove 232 and the third sliding groove 233 on the vent pipe 23 .

[0026] By adopting the above technical solution, the rain cap 31 and the fixing ring 32 are sleeved on the air release pipe 23, and the rain cap 31 is pressed. The rain cap 31 squeezes the spring telescopic rod 33, so that the block 34 in the rain cap 31 slides along the second slide groove 232 on the air release pipe 23 to the first slide groove 231. Then the rain cap 31 is rotated forty-five degrees and the rain cap 31 is loosened. The rain cap 31 is subjected to the rebound force of the spring telescopic rod 33, so that the sliding block 34 in the rain cap 31 is stuck in the third slide groove 233 on the air release pipe 23, thereby limiting the rain cap 31.

[0027] The protection assembly 4 includes a first half ring 41 and a second half ring 42 , and the first half ring 41 and the second half ring 42 are movably mounted at the joint between the upper cover 21 and the lower cover 22 .

[0028] By adopting the above technical solution, the first half ring 41 and the second half ring 42 are used to protect the joint between the upper cover 21 and the lower cover 22 .

[0029] A fixing rod 49 is fixedly installed on one side of the first half ring 41 , and bidirectional screws 43 are rotatably installed on both ends of the fixing rod 49 . The bidirectional screws 43 are threadedly inserted into the first half ring 41 and the second half ring 42 .

[0030] By adopting the above technical solution, the bidirectional screw 43 drives the first half ring 41 and the second half ring 42 to move toward each other, so that the first half ring 41 and the second half ring 42 are tightly fitted.

[0031] A rotating shaft 45 is rotatably mounted in the fixed rod 49 . Bevel gears 48 are fixedly mounted on both ends of the rotating shaft 45 and one end of the two bidirectional screws 43 , and two adjacent bevel gears 48 are meshed.

[0032] By adopting the above technical solution, the rotating shaft 45 drives the bidirectional screw 43 to rotate through the bevel gear 48, and the bidirectional screw 43 drives the first half ring 41 and the second half ring 42 to move toward each other, so that the first half ring 41 and the second half ring 42 are tightly fitted.

[0033] A worm wheel 46 is fixedly mounted on the rotating shaft 45 , a worm 47 is rotatably mounted in the fixed rod 49 , and the worm 47 is meshed with the worm wheel 46 , and a knob 44 is fixedly mounted on one end of the worm 47 .

[0034] By adopting the above technical solution, the knob 44 is used to drive the worm 47 to rotate, the worm 47 drives the worm wheel 46 to rotate, and the worm wheel 46 drives the rotating shaft 45 to rotate.

[0035] Working principle: When the utility model is in use, the cylinder 2 is assembled by the upper cover 21 and the lower cover 22. The joint of the upper cover 21 and the lower cover 22 is padded with a sealing gasket 5 to prevent the cylinder 2 from leaking and prevent water and dust from entering the cylinder 2 through the joint. Then, the rain cap 31 and the fixing ring 32 are put on the vent pipe 23, and the rain cap 31 is pressed. The rain cap 31 squeezes the spring telescopic rod 33, so that the block 34 in the rain cap 31 is pushed along the vent pipe. The second chute 232 on the air vent pipe 23 slides into the first chute 231, and then the rain cap 31 is rotated forty-five degrees and released. The rain cap 31 is subjected to the rebound force of the spring telescopic rod 33, so that the sliding block 34 in the rain cap 31 is engaged in the third chute 233 on the air vent pipe 23, thereby limiting the position of the rain cap 31. The rain cap 31 can prevent water and dust from entering the cylinder 2 through the air vent pipe 23 and damaging the structural components in the cylinder 2.

[0036] Then, the first half ring 41 and the second half ring 42 are sleeved on the joint of the upper cover 21 and the lower cover 22, and the knob 44 is used to drive the worm 47 to rotate, the worm 47 drives the worm wheel 46 to rotate, the worm wheel 46 drives the rotating shaft 45 to rotate, and the rotating shaft 45 drives the bidirectional screw 43 to rotate through the bevel gear 48, and the bidirectional screw 43 drives the first half ring 41 and the second half ring 42 to move toward each other, so that the first half ring 41 and the second half ring 42 are tightly fitted, which can effectively reduce the oxidation damage caused by the contact between the sealing gasket 5 and the air and rainwater, thereby increasing the service life of the sealing gasket 5.

[0037] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A pneumatic regulating valve, comprising a valve body (1), characterized in that: The top of the valve body (1) is fixedly mounted with a cylinder (2), and the valve body (1) is communicated with the interior of the cylinder (2). The cylinder (2) comprises an upper cover (21) and a lower cover (22). A sealing gasket (5) is provided between the upper cover (21) and the lower cover (22). The top of the upper cover (21) is fixedly mounted with an air release pipe (23), and the air release pipe (23) is communicated with the interior of the cylinder (2). The air release pipe (23) is provided with a first chute (231), and the air release pipe (23) is further provided with two symmetrically distributed second chute grooves (232) and two symmetrically distributed third chute grooves (233). A rainproof component (3) is sleeved on the air release pipe (23), and a protective component (4) is installed at the connection between the upper cover (21) and the lower cover (22).

2. A pneumatic control valve according to claim 1, characterized in that: The rainproof assembly (3) comprises a rainproof cap (31), and the rainproof cap (31) is sleeved on the air release pipe (23).

3. A pneumatic regulating valve according to claim 2, characterized in that: Four spring telescopic rods (33) distributed in an annular manner are fixedly installed at the bottom end of the rainproof cap (31), and a fixing ring (32) is fixedly installed at the bottom end of the four spring telescopic rods (33), and the fixing ring (32) is sleeved on the air release pipe (23).

4. A pneumatic control valve according to claim 2, characterized in that: Two symmetrically distributed clamping blocks (34) are fixedly installed in the rainproof cap (31), and the clamping blocks (34) can slide in the first sliding groove (231), the second sliding groove (232) and the third sliding groove (233) on the air release pipe (23).

5. The pneumatic regulating valve according to claim 1, characterized in that: The protective assembly (4) comprises a first half ring (41) and a second half ring (42), and the first half ring (41) and the second half ring (42) are movably mounted at the joint between the upper cover (21) and the lower cover (22).

6. A pneumatic regulating valve according to claim 5, characterized in that: A fixing rod (49) is fixedly installed on one side of the first half ring (41), and a bidirectional screw (43) is rotatably installed on both ends of the fixing rod (49), and the bidirectional screw (43) is threadedly inserted in the first half ring (41) and the second half ring (42).

7. A pneumatic regulating valve according to claim 6, characterized in that: A rotating shaft (45) is rotatably mounted in the fixed rod (49), and bevel gears (48) are fixedly mounted on both ends of the rotating shaft (45) and one end of the two bidirectional screw rods (43), and two adjacent bevel gears (48) are meshed.

8. The pneumatic regulating valve according to claim 7, characterized in that: A worm wheel (46) is fixedly mounted on the rotating shaft (45), a worm (47) is rotatably mounted in the fixed rod (49), and the worm (47) is meshed with the worm wheel (46), and a knob (44) is fixedly mounted on one end of the worm (47).

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