Hard seal welding butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and provides a hard seal welding butterfly valve which comprises a machine shell, a top cover is fixedly installed on the surface of the top of the machine shell through bolts, a connecting shaft is installed in the top cover in an embedded and clamped mode, a locking mechanism is installed in the machine shell in an embedded mode, and a connecting flange is fixedly installed at the bottom of the machine shell through bolts. A valve body is fixedly arranged at the bottom of the connecting flange, and a valve plate is embedded in a valve shell of the valve body. Through the arrangement of a first bevel gear and a second bevel gear, loss between tooth groove meshing is reduced according to the first bevel gear and the second bevel gear, the service life of parts is prolonged, and meanwhile through the arrangement of a transmission shaft and a rotating disc, when the rotating angle of the valve plate in the valve body needs to be adjusted, the rotating disc is rotated; and by rotating the rotary table, power drives the valve plate to rotate through meshing between tooth grooves of the first bevel gear and the second bevel gear, and therefore the valve plate can conveniently form an opening and closing structure in the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a hard-seal welded butterfly valve. Background Art

[0002] A hard-sealed butterfly valve, also known as a flap valve, is a simple regulating valve that can also be used to control the flow of low-pressure pipeline media. It primarily serves as a shutoff and throttling mechanism in pipelines. The valve's opening and closing mechanism is a disc-shaped disc that rotates around its axis within the valve body, enabling opening, closing, or regulating the flow. Hard-sealed butterfly valves are suitable for use in pipelines conveying various corrosive and non-corrosive media, such as generators, gas, steam, natural gas, city gas, hot and cold air, chemical refining projects, and power generation and environmental protection systems. They regulate and shut off the flow of these media. Hard-sealed butterfly valves can be divided into manual, pneumatic, and electric hard-sealed butterfly valves.

[0003] A search revealed an existing patent (publication number: CN 207093797 U) that discloses a welded hard-seal butterfly valve, comprising a valve body with flange connections installed at both ends, a center flange installed at the top of the valve body, a support frame installed above the center flange, a transmission mechanism mounting housing installed above the support frame, a gear mounted inside the top cover, a support rod mounted at a central position on the valve plate, the valve plate mounted within the valve body, and both sides of the valve plate in contact with an expansion wall installed on the inner wall of the valve body. The present invention has a transmission mechanism mounting housing installed at the top, a gear mounted within the transmission mechanism mounting housing, a screw mounted on one side of the gear, and a rotating handle mounted at one end of the screw. The rotating handle controls the telescopic movement of the screw, causing it to rub against the side of the gear, thereby controlling the rotation of the gear. This telescopic control method significantly enhances the sealing effect compared to previous linear control methods.

[0004] However, in the above scheme, during the use of the worm and the turbine, there is usually overheating and large wear between the parts during the meshing process of the worm and the thread, so it is necessary to regularly observe the meshing condition between the parts to avoid equipment damage.

[0005] In view of this, the utility model proposes a hard-seal welded butterfly valve. Utility Model Content

[0006] The utility model provides a hard-seal welded butterfly valve, which solves the problems of butterfly valves in related technologies.

[0007] The technical solution of the utility model is as follows: a hard-seal welded butterfly valve comprises a casing, a top cover is fixedly installed on the top surface of the casing with bolts, a connecting shaft is embedded and engaged inside the top cover, the shaft body of the connecting shaft is inserted into and fixedly installed with a No. 1 bevel gear, the tooth groove of the No. 1 bevel gear is meshed and connected with a No. 2 bevel gear, a transmission shaft is inserted and fixedly installed in the inner hole of the tooth hole of the No. 2 bevel gear, a turntable is fixedly installed with bolts on one end of the shaft body of the transmission shaft, a locking mechanism is embedded and installed inside the casing, a connecting flange is fixedly installed on the bottom of the casing with bolts, a valve body is fixedly provided at the bottom of the connecting flange, and a valve plate is embedded inside the valve casing of the valve body.

[0008] Preferably, the locking mechanism includes a connecting rod, a slider, a spring, a shift rod, a bearing ring, a dynamic clamping plate and a static clamping plate.

[0009] Preferably, the upper half of the connecting shaft is embedded in the interior of the casing, the lower half of the connecting shaft is embedded in the interior of the valve body, and the bottom of the connecting shaft is connected to the back of the valve plate.

[0010] Preferably, the first bevel gear and the second bevel gear are connected at right angles and arranged inside the casing, and the transmission shaft and the locking mechanism are arranged in parallel inside the casing.

[0011] Preferably, the fixing block of the locking mechanism is laterally inserted and installed with a connecting rod, a slider is fixedly installed on one end of the rod body of the connecting rod, a spring is inserted into and installed on one side end of the connecting rod, a shift rod is fixedly installed on the top of the rod body of the connecting rod, and one side end of the connecting rod is embedded and fixedly set in the inner shaft of the bearing ring, one side of the bearing ring is fixedly connected to a dynamic splint, and one side of the dynamic splint is connected to a static splint.

[0012] Preferably, the spring is arranged between the fixed block of the locking mechanism and the interval of the slider, the fixed block of the locking mechanism is fixed to the top of the inner wall of the casing, and the top of the slider is embedded in the sliding groove at the top of the inner wall of the casing.

[0013] Preferably, the shift lever is vertically arranged on the top of the connecting rod, and the top of the shift lever protrudes from the shell of the casing and is located in the slot.

[0014] Preferably, the external shape of the dynamic splint and the static splint is a circular structure, the dynamic splint and the static splint are fitted on the outside of the shaft body of the connecting shaft, and the inner wall material of the dynamic splint and the static splint is rubber material.

[0015] The working principle and beneficial effects of the utility model are as follows:

[0016] 3. The utility model provides a first bevel gear and a second bevel gear to reduce the loss between the tooth grooves of the first bevel gear and the second bevel gear, thereby increasing the service life of the parts. At the same time, through the arrangement of the transmission shaft and the turntable, when it is necessary to adjust the rotation angle of the valve plate inside the valve body, the power is transmitted by rotating the turntable through the meshing between the tooth grooves of the first bevel gear and the second bevel gear to drive the valve plate to rotate, thereby facilitating the valve plate to form an opening and closing structure inside the valve body.

[0017] 4. The locking structure provided in the present invention is based on the fact that the locking mechanism is arranged inside the casing. When the turntable is rotated to open and close the valve plate and the valve body, the connecting shaft is fixed by clamping and fixing the dynamic clamping plate and the static clamping plate of the locking mechanism, thereby facilitating the control of the opening and closing angle of the locking valve plate in the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the valve body of the present utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the casing of the present utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure of the No. 1 bevel gear of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection structure of the locking mechanism of the present utility model;

[0023] Figure 5 This is a schematic diagram of the bearing ring position structure of the present utility model.

[0024] In the figure: 1. Casing; 2. Top cover; 3. Connecting shaft; 4. Bevel gear No. 1; 5. Bevel gear No. 2; 6. Transmission shaft; 7. Turntable; 8. Locking mechanism; 81. Connecting rod; 82. Slider; 83. Spring; 84. Lever; 85. Bearing ring; 86. Dynamic splint; 87. Static splint; 9. Connecting flange; 10. Valve body; 11. Valve plate. DETAILED DESCRIPTION

[0025] The following will be combined with 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. Example 1

[0026] The preferred embodiment of the hard seal welding butterfly valve provided by the present invention is as follows: Figures 1 to 5 As shown: a hard-seal welded butterfly valve, comprising a casing 1, a top cover 2 is fixedly installed on the top surface of the casing 1 by bolts, a connecting shaft 3 is embedded and engaged inside the top cover 2, the shaft body of the connecting shaft 3 is inserted into and fixedly installed with a No. 1 bevel gear 4, the tooth groove of the No. 1 bevel gear 4 is meshed and connected with a No. 2 bevel gear 5, a transmission shaft 6 is inserted and fixedly installed in the inner hole of the tooth hole of the No. 2 bevel gear 5, a turntable 7 is fixedly installed on one end of the shaft body of the transmission shaft 6 by bolts, a locking mechanism 8 is embedded and installed inside the casing 1, a connecting flange 9 is fixedly installed on the bottom of the casing 1, a valve body 10 is fixedly provided at the bottom of the connecting flange 9, and a valve plate 11 is embedded inside the valve casing of the valve body 10.

[0027] In this embodiment, the upper half of the connecting shaft 3 is embedded in the interior of the housing 1, and the lower half of the connecting shaft 3 is embedded in the interior of the valve body 10. The bottom of the connecting shaft 3 is connected to the back of the valve plate 11. The housing 1 and the valve plate 11 in the valve body 10 are connected in series through the setting of the connecting shaft (3), and the valve plate 11 can be driven to rotate by the connecting shaft 3.

[0028] In this embodiment, the first bevel gear 4 and the second bevel gear 5 are connected at right angles to each other and are arranged inside the casing 1. The transmission shaft 6 and the locking mechanism 8 are arranged in parallel inside the casing 1. Through the arrangement of the first bevel gear 4 and the second bevel gear 5, the power transmission direction can be transferred without reducing the power by meshing the first bevel gear 4 and the second bevel gear 5 at right angles. Example 2

[0029] On the basis of Example 1, the preferred embodiment of the hard seal welding butterfly valve provided by the present invention is as follows: Figures 1 to 5 As shown: the locking mechanism 8 includes a connecting rod 81, a slider 82, a spring 83, a lever 84, a bearing ring 85, a dynamic splint 86 and a static splint 87. The fixed block of the locking mechanism 8 is laterally inserted with the connecting rod 81, one end of the rod body of the connecting rod 81 is fixedly installed with the slider 82, one side end of the connecting rod 81 is sleeved with the spring 83, the top of the rod body of the connecting rod 81 is fixedly installed with the lever 84, one side end of the connecting rod 81 is embedded in the inner shaft of the bearing ring 85, one side of the bearing ring 85 is fixedly connected to the dynamic splint 86, and one side of the dynamic splint 86 is connected to the static splint 87.

[0030] In this embodiment, the spring 83 is arranged between the fixed block of the locking mechanism 8 and the slider 82. The fixed block of the locking mechanism 8 is fixed to the top of the inner wall of the casing 1. The top of the slider 82 is embedded in the sliding groove at the top of the inner wall of the casing 1. Through the elastic contraction of the spring 83 itself, the slider 82 drives the connecting rod 81 to move forward, so that the dynamic splint 86 and the static splint 87 are fitted together.

[0031] In this embodiment, the lever 84 is vertically arranged on the top of the connecting rod 81, and the top of the lever 84 protrudes from the shell of the casing 1 and is located in the slot. Through the setting of the lever 84, the opening and closing between the dynamic splint 86 and the static splint 87 can be controlled to lock the connecting shaft 3.

[0032] In this embodiment, the external shape of the dynamic splint 86 and the static splint 87 is a circular structure. The dynamic splint 86 and the static splint 87 are fitted on the outside of the shaft body of the connecting shaft 3. The inner wall material of the dynamic splint 86 and the static splint 87 is rubber material. The rubber material in the inner wall of the dynamic splint 86 and the static splint 87 increases the friction force during the clamping process of the connecting shaft 3, thereby maintaining the stability of the connecting shaft 3 during the clamping process.

[0033] The working principle and usage process of the present invention are as follows: first, pull the lever 84 protruding from the top of the casing 1, drive the connecting rod 81 to move backward so that the dynamic clamping plate 86 and the static clamping plate 87 release the clamping state of the connecting shaft 3, and then move the lever 84 to the limit slot at the top of the casing 1 for limit. Then, rotate the turntable 7 to transmit power to the second bevel gear 5 through the transmission shaft 6, and through the tooth groove meshing connection between the second bevel gear 5 and the first bevel gear 4, the power transmission direction is turned at a right angle and transmitted to the inside of the valve body 10 through the connecting shaft 3, driving the valve plate 11 to rotate inside the valve body 10. When the opening and closing angle of the valve plate 11 in the valve body 10 reaches the required level, the lever 84 is reset, and then the spring 83 begins to contract, pulling the slider 82 to move, so that the connecting rod 81 pushes the dynamic clamping plate 86 and the static clamping plate 87 to form a clamping state, thereby fixing the connecting shaft 3, so that the valve plate 11 can fix the opening and closing angle in the valve body 10.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hard-seal welded butterfly valve, comprising a housing (1), characterized in that: The top surface of the housing (1) is fixedly mounted with a top cover (2) by bolts, and a connecting shaft (3) is embedded and engaged inside the top cover (2), and the shaft body of the connecting shaft (3) is inserted into and fixedly mounted with a No. 1 bevel gear (4), and the tooth groove of the No. 1 bevel gear (4) is meshed and connected with a No. 2 bevel gear (5), and a transmission shaft (6) is inserted and fixedly mounted in the inner hole of the tooth hole of the No. 2 bevel gear (5), and a turntable (7) is fixedly mounted with bolts on one end of the shaft body of the transmission shaft (6), and a locking mechanism (8) is embedded and mounted inside the housing (1), and a connecting flange (9) is fixedly mounted with bolts on the bottom of the housing (1), and a valve body (10) is fixedly arranged at the bottom of the connecting flange (9), and a valve plate (11) is embedded in the valve housing of the valve body (10).

2. The hard seal welded butterfly valve according to claim 1, characterized in that: The locking mechanism (8) comprises a connecting rod (81), a slider (82), a spring (83), a shifting rod (84), a bearing ring (85), a dynamic clamping plate (86) and a static clamping plate (87).

3. The hard seal welded butterfly valve according to claim 1, characterized in that: The upper half of the connecting shaft (3) is embedded in the interior of the housing (1), the lower half of the connecting shaft (3) is embedded in the interior of the valve body (10), and the bottom of the connecting shaft (3) is connected to the back of the valve plate (11).

4. The hard seal welded butterfly valve according to claim 1, characterized in that: The first bevel gear (4) and the second bevel gear (5) are connected in a right-angle meshing manner and are arranged inside the housing (1); the transmission shaft (6) and the locking mechanism (8) are arranged in parallel inside the housing (1).

5. The hard seal welding butterfly valve according to claim 2, characterized in that: The fixing block of the locking mechanism (8) is laterally inserted and installed with a connecting rod (81), one end of the rod body of the connecting rod (81) is fixedly installed with a slider (82), one end of one side of the connecting rod (81) is sleeved with a spring (83), the top of the rod body of the connecting rod (81) is fixedly installed with a shift rod (84), one end of one side of the connecting rod (81) is embedded in the inner shaft of the bearing ring (85), one side of the bearing ring (85) is fixedly connected with a dynamic splint (86), and one side of the dynamic splint (86) is connected with a static splint (87).

6. The hard seal welding butterfly valve according to claim 5, characterized in that: The spring (83) is arranged between the fixed block of the locking mechanism (8) and the slider (82), the fixed block of the locking mechanism (8) is fixed to the top of the inner wall of the housing (1), and the top of the slider (82) is embedded in the sliding groove at the top of the inner wall of the housing (1).

7. The hard seal welding butterfly valve according to claim 5, characterized in that: The shifting rod (84) is vertically arranged on the top of the connecting rod (81), and the top of the shifting rod (84) protrudes from the shell of the housing (1) and is located in the slot.

8. The hard seal welding butterfly valve according to claim 5, characterized in that: The external shape of the dynamic splint (86) and the static splint (87) is a circular structure. The dynamic splint (86) and the static splint (87) are arranged on the outside of the shaft body of the connecting shaft (3). The inner wall material of the dynamic splint (86) and the static splint (87) is a rubber material.

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