Eccentric half ball valve with high sealing performance

Abstract

The utility model relates to the technical field of eccentric half ball valves, and provides a high-sealing-performance eccentric half ball valve which comprises a valve shell, a valve cover is installed above the top of a ball body of the valve shell, a transmission shaft is arranged in an inner cavity of a valve body of the valve shell, and an eccentric half ball is fixedly installed at the bottom of the transmission shaft. A protection ring is fixedly installed on the surface of one side of the eccentric hemisphere, sealing rings are fixedly installed at inlets and outlets in the two ends of the valve shell in an embedded mode, and elastic rings are fixedly installed at the bottoms of ring bodies of the sealing rings. The impact force and pressure generated by water flow in the pipeline can be relieved through the springs, meanwhile, through the arrangement of the limiting columns, the stability of the blocking plate can be kept when the blocking plate is subjected to impact and pressure, and therefore the blocking plate can be protected while the impact and pressure of the water flow are relieved.

Description

Technical Field

[0001] This utility model relates to the field of eccentric hemispherical valve technology, specifically to a high-sealing eccentric hemispherical valve. Background Technology

[0002] The eccentric hemispherical valve is a relatively new type of ball valve. It has some unique advantages due to its structure, such as frictionless switching, less wear on the seal, and low opening and closing torque.

[0003] A search revealed an existing patent (publication number: CN 214579013 U) disclosing a high-sealing eccentric hemispherical valve, comprising a valve housing, a valve stem rotatably connected inside the valve housing, a valve body fixedly connected to the side surface of the valve stem, and an inner sliding groove on the left side of the valve body containing a push plate. This high-sealing eccentric hemispherical valve, through the inclusion of a push plate, a limiting rod, a sliding plate, a roller, a stop rod, a slot, and a through groove, allows the valve stem to rotate. When the valve body is fully closed, the immense water pressure impacts the push plate, causing it to move to the right and compress a spring. The spring compression offsets some of the impact. During the rightward movement of the push plate, the sliding plate presses against the roller, causing the roller to roll along its raceway, and the stop rod inserts into the slot. Both stop rods and the valve stem simultaneously bear the impact from the water pressure, thus solving the problem of high instantaneous water pressure at the valve body during emergency closure in current eccentric hemispherical valves, which easily damages the valve stem.

[0004] However, in the above solution, the equipment rotates during the emergency shutdown process. When subjected to water pressure impact, the different points of contact with the water pressure impact can cause damage to the equipment during emergency shutdown.

[0005] In view of this, the present invention proposes a high-sealing eccentric hemispherical valve. Utility Model Content

[0006] This invention proposes a high-sealing eccentric hemispherical valve, which solves the problems of eccentric hemispherical valves in related technologies.

[0007] The technical solution of this utility model is as follows: A high-sealing eccentric hemispherical valve includes a valve body, a valve cover is installed on the top of the ball of the valve body, a transmission device is fixedly installed on the top of the valve cover, a transmission shaft is provided in the valve body cavity of the valve body, an eccentric hemisphere is fixedly installed at the bottom of the transmission shaft, a flow-blocking device is fixedly installed on one side of the eccentric hemisphere, a protective ring is fixedly installed on one side surface of the eccentric hemisphere, sealing rings are embedded and fixedly installed at both ends of the valve body, and an elastic ring is fixedly installed at the bottom of the sealing ring.

[0008] Preferably, the flow-blocking device includes a limiting post, a spring, and a blocking plate.

[0009] Preferably, the drive shaft is symmetrically arranged at the top and bottom of the valve body cavity of the valve housing, and the shaft of the drive shaft located in the valve housing passes through the valve cover and is connected to the transmission device.

[0010] Preferably, the eccentric hemisphere is arranged in a "C" shape in the valve body cavity of the valve housing, and the connecting rods on both sides of the eccentric hemisphere are fixed to the drive shaft respectively.

[0011] Preferably, a limiting post is embedded and installed on one side surface of the main body of the flow-blocking device, a spring is fitted on the outer side of the limiting post, and a baffle plate is fixedly installed on one side end of the limiting post.

[0012] Preferably, the external shape of the flow-blocking device is trapezoidal, and the protruding shell of the flow-blocking device is provided with a groove.

[0013] Preferably, one side of the limiting post is embedded in the inner groove of the protruding housing of the flow blocking device, and the overall structure of the baffle plate is circular and embedded in the inner groove of the protruding housing of the flow blocking device. The limiting post and the spring are arranged in multiple sets at equal intervals between the inner groove of the flow blocking device and the baffle plate.

[0014] Preferably, the elastic ring is integrally embedded and fixed in the inner wall of the inlet and outlet of the valve housing, and one side surface of the sealing ring protrudes from the inner wall of the valve housing, and the protruding part of the sealing ring is tightly fitted with the protruding part of the flow blocking device housing.

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

[0016] In this utility model, the springs and limiting posts are mostly equidistantly arranged on the back of the baffle plate. When the ball valve is closed in an emergency, the impact and pressure generated by the water flow in the pipeline will be relieved by the springs. At the same time, the setting of the limiting posts ensures that the baffle plate can maintain its own stability when subjected to impact and pressure. This helps to relieve the impact and pressure of the water flow while providing protection for the baffle plate.

[0017] In this invention, the inclusion of an elastic ring and a protective ring allows the valve ball to pre-cut impurities in the water when closed, preventing wear and damage between devices caused by these impurities. Simultaneously, the elastic ring ensures that when the baffle plate is embedded into the valve body inlet, the sealing ring is compressed and tightly adheres to the surface of the flow-blocking device, thus enhancing the sealing performance between devices. Attached Figure Description

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

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

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

[0021] Figure 3 This is a schematic diagram of the eccentric hemispherical connection structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the flow-blocking device of this utility model;

[0023] Figure 5 This is a schematic diagram of the sealing ring structure of this utility model.

[0024] In the diagram: 1. Valve housing; 2. Valve cover; 3. Transmission device; 4. Transmission shaft; 5. Eccentric hemisphere; 6. Flow control device; 61. Limiting post; 62. Spring; 63. Baffle plate; 7. Protective ring; 8. Sealing ring; 9. Elastic ring. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example 1

[0026] A preferred embodiment of the high-sealing eccentric hemispherical valve provided by this utility model is, for example... Figures 1 to 5 As shown: A high-sealing eccentric hemispherical valve includes a valve body 1, a valve cover 2 mounted on the top of the ball of the valve body 1, a transmission device 3 fixedly mounted on the top of the valve cover 2, a transmission shaft 4 disposed in the inner cavity of the valve body 1, an eccentric hemisphere 5 fixedly mounted on the bottom of the transmission shaft 4, a flow-blocking device 6 fixedly mounted on one side of the eccentric hemisphere 5, a protective ring 7 fixedly mounted on one side surface of the eccentric hemisphere 5, sealing rings 8 embedded and fixedly mounted at both ends of the valve body 1, and an elastic ring 9 fixedly mounted at the bottom of the sealing ring 8.

[0027] In this embodiment, the drive shaft 4 is symmetrically arranged at the top and bottom of the valve body cavity of the valve body 1. The shaft of the drive shaft 4 in the valve body 1 passes through the valve cover 2 and is connected to the transmission device 3. The arrangement of the drive shaft 4 plays a role in power transmission when the ball valve is closed in an emergency, and at the same time plays a supporting role for the flow blocking device 6.

[0028] In this embodiment, the eccentric hemisphere 5 is arranged in a "C" shape in the valve body cavity of the valve housing 1. The connecting rods on both sides of the eccentric hemisphere 5 are fixed to the transmission shaft 4 respectively. By arranging the eccentric hemisphere 5 in a "C" shape, it is easier to speed up the flow of water when opening, reduce obstruction, and also reduce the damage caused by impurities in the water to the equipment.

[0029] In this embodiment, the elastic ring 9 is embedded and fixedly disposed in the inner wall of the inlet and outlet of the valve housing 1 in an annular shape. One side surface of the sealing ring 8 protrudes from the inner wall of the valve housing 1. The protruding part of the sealing ring 8 is tightly fitted with the protruding part of the housing of the flow blocking device 6. By setting the elastic ring 9, when the baffle plate 63 is embedded into the inlet of the valve housing 1, the sealing ring 8 can be tightly fitted with the surface of the flow blocking device 6 by the compression of the elastic ring 9, thereby strengthening the sealing between the devices. Example 2

[0030] Based on Example 1, a preferred embodiment of the high-sealing eccentric hemispherical valve provided by this utility model is as follows: Figures 1 to 5 As shown: The flow obstruction device 6 includes a limiting post 61, a spring 62 and a baffle plate 63. The limiting post 61 is embedded and installed on one side surface of the main body of the flow obstruction device 6. The spring 62 is fitted on the outer side of the limiting post 61. The baffle plate 63 is fixedly installed on one side end of the limiting post 61.

[0031] In this embodiment, the external shape of the flow-blocking device 6 is trapezoidal, and the inside of the protruding shell of the flow-blocking device 6 is provided with a groove. By setting the outer contour of the flow-blocking device 6 into a trapezoidal structure, it is easy for the flow-blocking device 6 to rotate in the inner cavity of the valve shell 1. At the same time, the protruding part of the flow-blocking device 6 is provided to protect the baffle plate 63.

[0032] In this embodiment, the limiting post 61 is embedded in the inner groove of the protruding housing of the flow-blocking device 6 on one side. The baffle plate 63 is circular in shape and embedded in the inner groove of the protruding housing of the flow-blocking device 6. The limiting post 61 and the spring 62 are arranged in multiple sets at equal intervals between the inner groove of the flow-blocking device 6 and the baffle plate 63. By arranging the spring 62 and the limiting post 61 at most equal intervals on the back of the baffle plate 63, when the ball valve is closed in an emergency, the impact force and pressure generated by the water flow in the pipeline will be relieved by the spring 62. Thus, the baffle plate 63 will unload the force when it comes into contact with the water flow impact at the first time, which is beneficial to its own protection.

[0033] The working principle and usage process of this utility model are as follows: First, the valve cover 2 and valve shell 1 are assembled and fixed with bolts. Then, the pipe is connected to the inlet and outlet at both ends of the valve shell 1. After the valve shell 1, pipe, and valve cover 2 are assembled, the transmission device 3 installed above the valve cover 2 applies a force to the transmission shaft 4, causing the transmission shaft 4 to rotate. During the rotation of the transmission shaft 4, the eccentric hemisphere 5 can be synchronously rotated 90 degrees inside the valve shell 1. The rotation of the eccentric hemisphere 5 causes the flow-blocking device 6 to open and close inside the valve shell 1. When the flow-blocking device 6 and the internal channel inlet of the valve shell 1 are closed, the surface of the flow-blocking device 6 and the valve... The sealing rings 8 inside the housing 1 fit tightly together, while the elastic ring 9 can make fine adjustments when the flow-blocking device 6 and the sealing ring 8 are in contact, so that the flow-blocking device 6 and the sealing ring 8 keep fit tightly together. At the same time, during the closing process, the impact of the water flow on the baffle plate 63 is relieved by the spring 62, and the baffle plate 63 can be restricted by the limiting post 61 to maintain the expansion and contraction stability of the baffle plate 63 in the inner groove of the housing of the flow-blocking device 6. When the flow-blocking device 6 rotates to the predetermined position in the valve housing 1, the transmission device 3 stops outputting power to the transmission shaft 4.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high sealing eccentric half ball valve comprising a valve housing (1), characterized in that, The valve shell (1) is provided with a valve cover (2) on the top of the ball, the top of the valve cover (2) is fixedly provided with a transmission device (3), the valve body cavity of the valve shell (1) is provided with a transmission shaft (4), the bottom of the transmission shaft (4) is fixedly provided with an eccentric hemisphere (5), one side of the eccentric hemisphere (5) is fixedly provided with a flow resistance device (6), one side surface of the eccentric hemisphere (5) is fixedly provided with a protective ring (7), the inlet and outlet of the two ends of the valve shell (1) are embeddedly fixedly provided with a sealing ring (8), the bottom of the ring body of the sealing ring (8) is fixedly provided with an elastic ring (9).

2. A high sealing eccentric half ball valve according to claim 1, characterized in that, The flow resistance device (6) comprises a limiting column (61), a spring (62) and a blocking plate (63).

3. The high sealing eccentric half ball valve according to claim 1, wherein, The transmission shaft (4) is symmetrically arranged in the valve body cavity of the valve shell (1) top and bottom, the transmission shaft (4) is located in the shaft body of the valve shell (1) and is connected with the transmission device (3) through the valve cover (2).

4. The high containment eccentric hemisphere valve of claim 1, wherein, The eccentric hemisphere (5) is arranged in the valve body cavity of the valve shell (1) in the shape of "C", and the two side links of the eccentric hemisphere (5) are fixedly connected with the transmission shaft (4).

5. A high sealing eccentric half ball valve according to claim 2, characterized in that, The limiting column (61) is embeddedly installed on one side surface of the main body of the flow resistance device (6), the spring (62) is sleevedly installed on the outer side of the column body of the limiting column (61), and the blocking plate (63) is fixedly installed on one side end of the limiting column (61).

6. A high sealing eccentric half ball valve according to claim 5, characterized in that The external shape of the flow resistance device (6) is in the shape of trapezoidal structure, and the recess is arranged in the convex shell of the flow resistance device (6).

7. A high sealing eccentric half ball valve according to claim 5, characterized in that, The limiting column (61) is embeddedly installed in the recess of the convex shell of the flow resistance device (6) on one side, the blocking plate (63) is embeddedly arranged in the recess of the convex shell of the flow resistance device (6) in the shape of circular structure, and the limiting column (61) and the spring (62) are arranged between the recess and the blocking plate (63) of the flow resistance device (6) in the shape of equidistant multiple groups.

8. The high containment eccentric hemisphere valve of claim 1, wherein, The elastic ring (9) is embeddedly and fixedly arranged in the inner wall of the inlet and outlet of the valve shell (1) in the shape of ring, one side surface of the sealing ring (8) protrudes from the inner wall of the valve shell (1), and the protruding part of the sealing ring (8) is tightly combined with the convex part of the shell of the flow resistance device (6).

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