Inflatable nodular cast iron dome valve

Abstract

The utility model discloses an inflatable ball-milling cast iron dome valve which comprises a valve body (1), the valve body (1) serves as a main body, a ball top (12) is arranged in the valve body (1), and the ball top (12) is installed on the valve body (1) in a supporting mode through a shaft (3) and a bearing (25). The shaft (3) is connected with the ball top (12) through an elastic cylindrical pin (4); the O-shaped sealing ring (23) is arranged at one end of the shaft (3) and is used for tightly sealing the bearing hole which is pressed in the valve body (1) in a manner of being matched with the spacer ring (27); and the V-shaped sealing ring (5) is arranged at the other end of the bearing (25), the inner diameter is sleeved on the shaft (3), and the outer diameter is in contact with the inner diameter of a bearing hole. The utility model has the advantages of good sealing performance, simple operation, good trafficability, intelligent protection, long service life, low manufacturing cost, simple maintenance, and the like, and only the sealing ring needs to be replaced without scrapping the whole valve during maintenance.

Description

Technical Field

[0001] The utility model relates to a dome valve, in particular to an inflatable cast iron ball mill dome valve. Background Art

[0002] Most of the valves used in the current pneumatic conveying industry of materials are pneumatic double flap valves, pneumatic disc valves, pneumatic butterfly valves and pneumatic ball valves. And the pneumatic conveying system requires good pressure resistance and pressure retention, and requires good sealing performance of the valve, durability, and low cost, which has become a major key restricting the development of the pneumatic conveying system industry. If a traditional valve wants to have good sealing performance, it must reduce the gap between the valve core and the valve body. Reducing the gap between the valve body and the valve core will increase the wear during the valve opening and closing actions. When conveying powder, the particle size of the material is relatively small, and then it adheres to the valve body, and the wear during the valve body opening and closing actions will be more serious. Therefore, when a traditional valve is used in a pneumatic conveying system for powder, its service life is very short, and it has characteristics such as high failure rate and high cost of construction. Content of the Utility Model

[0003] In order to solve the above problems, the utility model provides an inflatable cast iron ball mill dome valve, which has the advantages of good sealing performance, good passability, intelligent protection, long service life, low cost, and simple maintenance compared with traditional valves.

[0004] The utility model is realized through the following technical solutions: An inflatable cast iron ball mill dome valve, comprising:

[0005] A valve body, as the main body, is internally provided with a spherical top, and the spherical top is supported and installed on the valve body through a shaft and a bearing;

[0006] A shaft, which is connected with the spherical top through an elastic cylindrical pin;

[0007] An O-ring seal is arranged at one end of the shaft and is used for tightly sealing and cooperating with a spacer ring to be press-fitted into the bearing hole of the valve body;

[0008] A V-ring seal is arranged at the other end of the bearing, with its inner diameter sleeved on the shaft and its outer diameter contacting the inner diameter of the bearing hole;

[0009] A lower support ring is installed on the upper end face of the valve body;

[0010] An upper support ring and an upper support ring seal, the upper support ring seal is buckled on the upper support ring, and after being integrated with the upper support ring, it is installed on the lower support ring;

[0011] A gasket is arranged between the lower support ring and the valve body and is used for adjusting the gap and sealing between the upper support ring seal and the spherical top;

[0012] An O-ring is installed in the O-ring groove of the lower support ring and is fixed by bolts;

[0013] A straight rod cylinder is installed on the main valve body through a front cylinder fixing plate and a rear cylinder fixing plate, and is equipped with a limit switch to control the movement range of the cylinder.

[0014] A screw suction nozzle is installed at the bottom of the transition plate. The rotary locking mechanism is installed on the pressure lifting device through an electric screwdriver and an electric screwdriver fixing seat.

[0015] As a preferred technical solution, a "Z" - shaped structure is formed among the screw suction nozzle, the transition plate and the rotary locking mechanism.

[0016] As a preferred technical solution, a transmission wheel is arranged at the top of the rotary locking mechanism, and the rotary motor drives the rotary locking mechanism to rotate at any angle of 360 degrees through a transmission belt.

[0017] As a preferred technical solution, screw hole positions are arranged on both sides of the electric screwdriver fixing seat, and it is fixed on the pressure lifting device through screws.

[0018] As a preferred technical solution, a V - shaped sealing ring is installed at the other end of the bearing. The inner diameter of the V - shaped sealing ring is sleeved on the shaft, and the outer diameter contacts the inner diameter of the bearing hole.

[0019] As a preferred technical solution, the upper support ring and the upper support ring sealing ring are integrally connected and then installed on the lower support ring. A gasket is installed between the lower support ring and the valve body to adjust the gap and seal between the upper support ring sealing ring and the ball top.

[0020] As a preferred technical solution, the O - ring is installed in the O - ring groove of the lower support ring and fixed by bolts.

[0021] As a preferred technical solution, the cylinder is installed on the rear cylinder fixing plate, and finally fixed on the main valve body. A limit switch is installed on the rear cylinder fixing plate to control the movement range of the cylinder.

[0022] As a preferred technical solution, a two - position five - way solenoid valve and a pressure switch are installed in the pneumatic control box. The solenoid valve controls the forward and backward movement of the piston rod of the cylinder to realize the opening and closing of the valve.

[0023] As a preferred technical solution, the seal of the valve is a silicone rubber flexible seal.

[0024] The beneficial effects of the present utility model are: good sealing performance, simple operation, good passing performance, intelligent protection, long service life, low cost, simple maintenance, and only the sealing ring needs to be replaced during maintenance without scrapping the whole valve. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is the closed view of an inflatable cast iron globe valve of the present invention;

[0027] Figure 2 is the left view of an inflatable cast iron globe valve of the present invention;

[0028] Figure 3 is the front view of an inflatable cast iron globe valve of the present invention;

[0029] Figure 4 is the top view of an inflatable cast iron globe valve of the present invention. Detailed implementation manners

[0030] All features disclosed in this specification, or all steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.

[0031] Any feature disclosed in this specification (including any additional claims, abstract, and drawings), unless specifically stated, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.

[0032] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown in the figure, a pneumatic cast iron globe valve of the utility model patent is characterized in that: the pneumatic cast iron globe valve mainly consists of a valve body 1, a shaft end retaining ring 2, a shaft 3, an elastic cylindrical pin 4, a V-shaped sealing ring 5, gaskets 0.4mm 6, gaskets 0.8mm 7, gaskets 1.5mm 8, a top plate 9, a lower support ring 10, an upper support ring 11, a ball top 12, an upper support ring sealing ring 13, an O-ring 14, an external hexagonal head bolt 15, a flat washer 16, a hexagonal head bolt 17, a spring washer 18, a crank arm bushing 19, a crank arm 20, elastic cylindrical pins 21, elastic cylindrical pins 22, an O-ring 23, an adjusting gasket 24, a bearing 25, a dust-proof ring 26, a spacer ring 27, a trunnion bushing 28, a cylinder front fixing plate 29, a cylinder joint assembly 30, a cylinder rear fixing plate 31, a grease nipple 32, a grease nipple cap 33, an internal hexagonal socket head screw 34, a spring washer 35, a limit switch 36, an external hexagonal head bolt 37, a hexagonal nut 38, an elastic cylindrical pin 39, a nameplate 40, a nameplate rivet 41, a direct rod cylinder 42, an external hexagonal head bolt 43, and a spring pad assembly 44.

[0033] The valve body 1 of the pneumatic cast iron globe valve serves as the main body. The ball top 12 of the pneumatic cast iron globe valve is installed on the valve body 1 under the support of the shaft 3 and the bearing 25. The shaft 3 and the ball top 12 are connected by a set screw elastic cylindrical pin 4. Two O-ring seals 23 are installed at one end of the bearing 25 close to the ball top 12. The inner diameter of the O-ring seal 23 tightly sleeves on the outer diameter of the shaft and is press-fitted with the spacer ring 27 in the bearing hole of the valve body 1 to play a role in sealing and dust prevention.

[0034] At the other end of the bearing 25, a V-shaped sealing ring 5 is installed. The inner diameter of the V-shaped sealing ring 5 sleeves on the shaft 3, and the outer diameter contacts the inner diameter of the bearing hole. The other end of the shaft is on the trunnion bushing 20 of the direct rod cylinder. The V-shaped sealing ring 5 and the trunnion bushing 20 of the direct rod cylinder are connected by a fastening screw 34 to effectively ensure the tight combination of the V-shaped sealing ring 5 with the shaft 3 and the valve body 1 to ensure good sealing.

[0035] The lower support ring 10 is installed on the upper end face of the valve body 1. The upper support ring sealing ring 13 is buckled on the upper support ring 11 and is installed on the lower support ring 10 after being integrated with the upper support ring 11. Gaskets 6, 7, and 8 are installed between the lower support ring 10 and the valve body 1. The thicknesses of the gaskets 6, 7, and 8 are 0.4mm, 0.8mm, and 1.5mm respectively to adjust the gap and seal between the upper support ring sealing ring 13 and the ball top 12 after assembly. Finally, the O-ring 14 is installed in the O-ring groove of the lower ring and locked with bolts. This is the main valve body part. The cylinder 42 is installed on the cylinder rear fixing plate 31 and finally fixed on the main valve body. A limit switch 36 device is installed on the cylinder rear fixing plate 31 to control the action range of the cylinder.

[0036] Each inflatable cast iron dome valve is controlled by a pneumatic control box, which is equipped with a two-position five-way solenoid valve and a pressure switch. The solenoid valve controls the forward and backward movement of the piston rod of the cylinder to realize the opening and closing of the valve. The pneumatic control box, limit switch, straight rod cylinder and dome valve are connected together by nylon pipes.

[0037] The working principle of the inflatable cast iron dome valve is described as follows:

[0038] After the control system is started, valve 1 will be in the initial state according to the process requirements of the system. Driven by cylinder 42, the crank arm shaft 20 of the straight rod cylinder drives the ball top 12 to rotate 90 degrees. The ball top 12 is vertically upward. At the same time, the crank arm shaft 20 of the straight rod cylinder presses down the plunger of the limit switch 36, and the sealing ring is inflated. The sealing ring tightly wraps the ball top 12 to ensure the sealing of valve 1. When valve 1 is opened, the piston rod of cylinder 42 retracts, the plunger of limit switch 36 is released, the sealing ring deflates, and the crank arm shaft 20 of the straight rod cylinder drives the ball top 12 to rotate 90 degrees around the axis, so that the ball top 12 is placed inside the valve body 1. At this time, valve 1 is fully open for material passage. During the entire opening and closing process of valve 1, there is no rigid friction between the ball top 12 and the sealing ring, which reduces the wear of the sealing ring and the ball top 12 and ensures the service life of valve 1. The tight combination of the sealing ring and the ball top 12 is a necessary condition to ensure the sealing and service life of the entire valve 1. Therefore, the inflation pressure of the sealing ring must be monitored. When the inflation pressure of the sealing ring is lower than the set pressure, the system alarms for protection to ensure that the ball top 12 and the sealing ring are not damaged by the material, effectively ensuring the service life of the inflatable cast iron dome valve.

[0039] The described inflatable cast iron dome valve is applicable to pneumatic conveying systems for various industrial powders and / or materials with a particle size less than 5 mm.

[0040] The seal of the described inflatable cast iron dome valve is a silicone rubber flexible seal.

[0041] The sealing ring and the ball top 12 of the described inflatable cast iron dome valve are the inflatable sealing structure of the inflatable dome valve, and the limit switch 36 and the pressure switch are the intelligent protection structure of the inflatable cast iron dome valve.

[0042] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any change or replacement that can be thought of without creative work should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.

Claims

1. An inflatable spherical mill cast iron globe valve, characterized in that, Including: A pneumatic control box; A valve body (1) which serves as the main body and has a spherical top (12) inside. The spherical top (12) is supported and installed on the valve body (1) through a shaft (3) and a bearing (25); A shaft (3) which is connected to the spherical top (12) through an elastic cylindrical pin (4); An O-ring seal (23) is arranged at one end of the shaft (3) and is used for tightly sealing and fitting with a spacer ring (27) and being press-fitted into the bearing hole of the valve body (1); A V-ring seal (5) is arranged at the other end of the bearing (25). The inner diameter is sleeved on the shaft (3), and the outer diameter contacts the inner diameter of the bearing hole; A lower support ring (10) is installed on the upper end surface of the valve body (1); An upper support ring (11) and an upper support ring seal (13). The upper support ring seal (13) is buckled on the upper support ring (11), and after being integrated with the upper support ring (11), it is installed on the lower support ring (10); Gaskets (6, 7) are arranged between the lower support ring (10) and the valve body (1) and are used for adjusting the gap and sealing between the upper support ring seal (13) and the spherical top (12); An O-ring (14) is installed in the O-ring groove of the lower support ring and is fixed by bolts; A straight rod cylinder (42) is installed on the main valve body through a cylinder front fixing plate (29) and a cylinder rear fixing plate (31), and is equipped with a limit switch (36) to control the movement range of the cylinder; A screw suction nozzle is installed at the bottom of the transition plate. The rotary locking mechanism (9) is installed on the pressure lifting device through an electric screwdriver and an electric screwdriver fixing seat.

2. The inflatable ball mill cast iron dome valve according to claim 1, characterized in that: A "Z" - shaped structure is formed among the screw suction nozzle, the transition plate and the rotary locking mechanism (9).

3. The inflatable spherical mill cast iron globe valve according to claim 1, wherein: A transmission wheel is arranged at the top of the rotary locking mechanism (9). The rotary motor drives the rotary locking mechanism (9) to rotate at any angle of 360 degrees through a transmission belt (8).

4. The inflatable cast iron dome valve according to claim 1, characterized in that: Screw hole positions are arranged on both sides of the electric screwdriver fixing seat, and it is fixed on the pressure lifting device through screws.

5. The inflatable cast iron dome valve according to claim 1, characterized in that: The other end of the bearing (25) is equipped with a V-ring seal (5). The inner diameter of the V-ring seal is sleeved on the shaft (3), and the outer diameter contacts the inner diameter of the bearing hole.

6. The inflatable ball mill cast iron dome valve according to claim 1, characterized in that: The upper support ring (11) and the upper support ring seal (13) are integrated and then installed on the lower support ring (10). Gaskets (6, 7) are installed between the lower support ring and the valve body (1) to adjust the gap and sealing between the upper support ring seal and the spherical top.

7. The inflatable ball mill cast iron dome valve according to claim 1, wherein: The O-ring (14) is installed in the O-ring groove of the lower support ring and is fixed by bolts.

8. The inflatable ball-milled cast iron dome valve according to claim 1, wherein: The cylinder (42) is installed on the cylinder rear fixing plate (31), and finally fixed on the main valve body. A limit switch (36) is installed on the cylinder rear fixing plate to control the movement range of the cylinder.

9. The inflatable spherical cast iron globe valve according to claim 1, wherein: A two-position five-way solenoid valve and a pressure switch are installed in the pneumatic control box. The solenoid valve controls the forward and backward movement of the piston rod of the cylinder to realize the opening and closing of the valve.

10. The inflatable cast iron dome valve according to claim 1, wherein: The seal of the valve body is a silicone rubber flexible seal.

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