Mechanical connection gate valve

Abstract

The utility model provides a mechanical connection gate valve which comprises a valve body, two ends of the valve body are symmetrically connected with main flanges, the main flanges are movably connected with fastening plates through long bolts, two ends, close to the main flanges, of an inner cavity of the valve body are fixedly connected with sealing rings through grooves, and the middle of the inner cavity of the valve body is symmetrically connected with valve seats. And meanwhile, limiting plates are symmetrically connected to the two sides of the middle of the inner cavity of the valve body, and limiting grooves are correspondingly formed in the positions, opposite to the limiting plates, of the two sides of the valve plate. According to the gate valve, the long bolt, the main flange, the extrusion plate and the sealing ring are matched, the sealing performance of the joint between the gate valve and a pipeline can be effectively enhanced, meanwhile, the valve seat, the sealing gasket and the valve plate are matched, the sealing performance of the gate valve during opening and closing can be effectively enhanced, abrasion of the valve plate can be effectively reduced, and the service life of the gate valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sealed gate valves, in particular to a mechanically connected gate valve. Background Technique

[0002] A mechanically connected gate valve is a gate valve with a flange connection method, which is the most common connection method; when used in a pipeline, a flange gate valve is stable and reliable, so a flange gate valve is often used on high-pressure pipelines; a flange is a mechanical connection method, and two pipelines or devices with flange end faces are tightly connected by bolts and nuts to achieve the transportation and control of fluids; the opening and closing member (gate plate) of the gate valve moves in the direction perpendicular to the direction of the medium flow to open or close the valve. This structure makes the gate valve mainly used for cutting off the medium in the pipeline, that is, fully open or fully closed, and is not suitable for regulation and throttling. However, the valve plate will be worn during long-term lifting and lowering use, resulting in a decrease in sealing performance, and even water seepage and leakage problems may occur in the closed state of the gate valve. The reduction of the sealing performance will reduce the service life of the gate valve. At the same time, when the common gate valve connects the pipeline through the flange, it is only fixed by long bolts and lacks corresponding auxiliary fastening structures, so that the sealing performance at the connection end of the gate valve is the best around the long bolts, while the sealing performance at some positions far from the long bolts will decrease. Content of the Utility Model

[0003] To overcome the defects existing in the prior art, a mechanically connected gate valve is provided to solve the problems raised in the above background technique.

[0004] To achieve the above object, a mechanically connected gate valve is provided, including: a valve body, the upper surface of the valve body is fixedly connected to a cover plate by bolts, the valve stem is slidably connected to the cover plate through a sealing sleeve, and the part of the valve stem located inside the valve body is fixedly connected to a valve plate. The two ends of the valve body are symmetrically connected with main flanges, and the main flanges are movably connected to fastening plates by long bolts. Both ends of the inner cavity of the valve body near the main flanges are fixedly connected with sealing rings through grooves. The middle part of the inner cavity of the valve body is symmetrically connected with valve seats. At the same time, a sealing pad is fixedly connected to the side of the valve seat away from the sealing ring. At the same time, limiting plates are symmetrically connected to both sides of the middle part of the inner cavity of the valve body, and limiting grooves are correspondingly opened at the positions of both sides of the valve plate opposite to the limiting plates.

[0005] Preferably, the two groups of fastening plates movably connected to the two ends of the valve body by long bolts are both square structures, and the corners of the outer side surfaces of the fastening plates are arc-shaped structures. A through hole is correspondingly opened at the position of the middle part of the fastening plate opposite to the inner cavity of the valve body. The through hole is circular, and the size of the through hole is adapted to the inner cavity of the valve body.

[0006] Preferably, the two groups of grooves opened at both ends of the inner cavity of the valve body are both circular ring structures, the sealing rings fixedly connected in the grooves are circular ring structures, and the inner diameter of the sealing ring is smaller than the inner diameter of both ends of the inner cavity of the valve body.

[0007] Preferably, the two valve seats fixedly connected to the middle of the valve body cavity are both in an annular structure, the inner diameter of the valve seat is smaller than that of the sealing ring, a receiving groove is provided above the middle of the valve body cavity, the receiving groove is in a square structure, and the valve body as a whole is in a T-shaped structure.

[0008] Preferably, the sealing gasket fixedly connected to the surface of the valve body is in an annular structure, the axial section of the sealing gasket is in a right-angled trapezoidal structure, one side of the sealing gasket away from the valve seat abuts against the surface of the valve plate, the inner diameter of the sealing gasket is equal to that of the valve seat, the lower end of the sealing layer is fixedly connected to the upper surface of the sealing gasket, the upper end of the sealing layer is fixedly connected in the receiving groove, and the sealing layer as a whole is in a concave structure, and the groove of the sealing layer is adapted to the arc surface dimension of the upper surface of the sealing gasket.

[0009] Preferably, the upper end of the valve plate is in a square structure, the lower end of the valve plate is in a semi-circular structure, the lower end of the valve plate is adapted to the size of the valve body cavity, the upper end of the valve body is adapted to the size of the receiving groove, the middle of the valve plate is fixedly connected to the valve stem through a fixing hole, and the extrusion surfaces on both sides of the lower end of the valve plate are both in an inclined surface structure.

[0010] Preferably, the two limiting plates fixedly connected inside the valve body are both in a long strip structure, the limiting grooves provided on the side surface of the valve plate are adapted to the size of the limiting plates, and the lower surfaces of the two main flanges fixedly connected to both ends of the valve body are both in a flat surface structure.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: through the cooperation of the valve seat, the sealing gasket and the valve stem, when the valve plate rises and falls inside the valve body, the probability of wear of the valve plate can be effectively reduced, and the sealing gasket abuts against the surface of the valve plate, which can not only effectively enhance the sealing performance of the valve plate, but also still have a good sealing effect when the valve plate is worn, thereby improving the service life of the gate valve. At the same time, through the cooperation of the main flange, the long bolt, the fastening plate and the sealing ring, when the two ends of the gate valve are connected to the pipeline, the fastening plate can cooperate with the long bolt to enhance the uniformity of the force at the connection of the two main flanges between the gate valve and the pipeline, thereby enhancing the sealing performance between the gate valve and the pipeline, and can also assist in enhancing the stability of the connection between the gate valve and the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of an embodiment of the present utility model.

[0013] Figure 2 It is a side view schematic diagram of an embodiment of the present utility model.

[0014] Figure 3 It is a partial front view structure schematic diagram of an embodiment of the present utility model.

[0015] Figure 4 It is a top view structure schematic diagram of an embodiment of the present utility model.

[0016] Figure 5 This is a partial side view structural schematic diagram of an embodiment of the present utility model.

[0017] In the figure: 1, valve stem; 2, cover plate; 3, valve body; 4, main flange; 5, long bolt; 6, fastening plate; 7, sealing ring; 8, valve seat; 9, sealing gasket; 10, valve plate; 11, limiting groove; 12, limiting plate; 13, extrusion surface; 14, sealing layer. Specific embodiments

[0018] Referring to Figures 1 to 5 As shown, the present utility model provides a mechanically connected gate valve, including: a valve body 3, the upper surface of the valve body 3 is fixedly connected to a cover plate 2 by bolts, the valve stem 1 is slidably connected to the cover plate 2 through a sealing sleeve, and the part of the valve stem 1 located inside the valve body 3 is fixedly connected to a valve plate 10. The two ends of the valve body 3 are symmetrically connected to main flanges 4, and the main flanges 4 are movably connected to fastening plates 6 by long bolts 5. Both ends of the inner cavity of the valve body 3 near the main flanges 4 are fixedly connected to sealing rings 7 through grooves. The middle part of the inner cavity of the valve body 3 is symmetrically connected to valve seats 8. At the same time, a sealing gasket 9 is fixedly connected to the side of the valve seat 8 away from the sealing ring 7. At the same time, limiting plates 12 are symmetrically connected to both sides of the middle part of the inner cavity of the valve body 3, and limiting grooves 11 are correspondingly opened at the positions of both sides of the valve plate 10 opposite to the limiting plates 12.

[0019] In this embodiment, when the gate valve is connected to a pipeline, the connecting end of the pipeline is embedded into the inner cavity of the valve body 3 and abuts against the sealing ring 7. The sub-flange fixedly connected to the outer side surface of the pipeline abuts against the main flange 4 connected to the valve body 3. Then, the fastening plate 6 sleeved on the pipeline in advance is moved to the vicinity of the sub-flange, and the long bolt 5 is sequentially passed through the through holes correspondingly opened in the fastening plate 6, the sub-flange, and the main flange 4, and the threaded end of the long bolt 5 is screwed with a nut, thereby realizing the sealing performance and the stability of the connection at the connection between the gate valve and the pipeline. After that, when the gate valve needs to be opened, the valve plate 10 is driven to move upward by the valve stem 1, thereby releasing the blockage of the valve plate 10 on the valve seat 8 and the sealing gasket 9, so that the two ends of the gate valve are communicated, and thus the fluid in the pipeline can smoothly pass through the gate valve. When the valve plate 10 is in a fully open state, the surface of the valve plate 10 still abuts against the surfaces of the sealing gasket 9 and the sealing layer 14, which is convenient for the subsequent closing of the gate valve.

[0020] As a preferred embodiment, the two fastening plates 6 movably connected to both ends of the valve body 3 by long bolts 5 are both of square structures, and the corners of the outer side surfaces of the fastening plates 6 are of arc structures. A through hole is correspondingly opened in the middle part of the fastening plate 6 relative to the inner cavity of the valve body 3. The through hole is of a circular structure, and at the same time, the size of the through hole is adapted to the inner cavity of the valve body 3.

[0021] In this embodiment, as Figure 1 and Figure 2, The cooperation between the fastening plate 6 and the long bolt 5 can assist in enhancing the sealing performance and stability of the connection between the gate valve and the pipeline, and can further reduce the probability of accidental leakage between the pipeline and the gate valve.

[0022] As a preferred embodiment, the two groups of grooves opened at both ends of the inner cavity of the valve body 3 are both of an annular structure, and the sealing rings 7 fixedly connected in the grooves are of an annular structure, and the inner diameter of the sealing ring 7 is smaller than the inner diameter of both ends of the inner cavity of the valve body 3.

[0023] In this embodiment, as shown in Figure 3 and Figure 4 , the setting of the sealing ring 7 enables the end face of the pipeline to abut against the sealing ring 7 when the connecting end of the pipeline is inserted into the valve body 3, thereby assisting in enhancing the sealing performance at the connection between the pipeline and the gate valve.

[0024] As a preferred embodiment, the two valve seats 8 fixedly connected in the middle of the inner cavity of the valve body 3 are both of an annular structure, and the inner diameter of the valve seat 8 is smaller than the inner diameter of the sealing ring 7. A receiving groove is opened above the middle of the inner cavity of the valve body 3, and the receiving groove is of a square structure. At the same time, the valve body 3 as a whole is of a T-shaped structure.

[0025] In this embodiment, as shown in Figure 3 , Figure 4 and Figure 5 , the setting of the valve seat 8 enables the sealing gasket 9, the sealing layer 14 and the valve plate 10 to be smoothly arranged in the receiving groove, thereby ensuring good on-off effect of the gate valve when the valve plate 10 is opened and closed, and can also assist in enhancing the impact resistance effect of the valve plate 10.

[0026] As a preferred embodiment, the sealing gasket 9 fixedly connected to the surface of the valve body 3 is of an annular structure, and the axial section of the sealing gasket 9 is of a right trapezoidal structure. The side of the sealing gasket 9 away from the valve seat 8 abuts against the surface of the valve plate 10. At the same time, the inner diameter of the sealing gasket 9 is equal to the inner diameter of the valve seat 8. The lower end of the sealing layer 14 is fixedly connected to the upper surface of the sealing gasket 9, and the upper end of the sealing layer 14 is fixedly connected in the receiving groove. And the sealing layer 14 as a whole is of a concave structure, and the groove of the sealing layer 14 is adapted to the arc surface size of the upper surface of the sealing gasket 9.

[0027] In this embodiment, as shown in Figure 3 , Figure 4 and Figure 5 , both the sealing gasket 9 and the sealing layer 14 are made of soft rubber material, which can then enhance the abutting effect between the sealing gasket 9 and the sealing layer 14 and the surface of the valve plate 10, and further assist in enhancing the sealing effect of the valve plate 10 inside the gate valve, thereby assisting in extending the service life of the gate valve.

[0028] As a preferred embodiment, the upper end of the valve plate 10 is of a square structure, the lower end of the valve plate 10 is of a semi-circular structure, and the size of the lower end of the valve plate 10 is adapted to the inner cavity of the valve body 3, and the size of the upper end of the valve body 3 is adapted to the size of the receiving groove. At the same time, the middle part of the valve plate 10 is fixedly connected to the valve stem 1 through a fixing hole, and the extrusion surfaces 13 on both sides of the lower end of the valve plate 10 are both of an inclined surface structure.

[0029] In this embodiment, as Figure 3 , Figure 4 and Figure 5 , the sizes of the respective parts of the valve plate 10 are adapted to the corresponding positions inside the valve body 3, so that the stability of the valve plate 10 during movement and the sealing performance at the contact surface between the valve plate 10 and the inner cavity of the valve body 3 can be assisted and enhanced. At the same time, the extrusion surface 13 provided at the lower end of the valve plate 10 can reduce the difficulty of the valve plate 10 moving downward to close the gate valve, and can also assist in reducing the wear rate between the valve plate 10, the sealing layer 14 and the sealing gasket 9.

[0030] As a preferred embodiment, the two sets of limiting plates 12 fixedly connected inside the valve body 3 are both of a strip-shaped structure, and the limiting grooves 11 provided on the side surface of the valve plate 10 are adapted to the size of the limiting plates 12, and the lower surfaces of the two sets of main flanges 4 fixedly connected to both ends of the valve body 3 are both of a flat surface structure.

[0031] In this embodiment, as Figure 3 , Figure 4 and Figure 5 , the sizes of the limiting plates 12 and the limiting grooves 11 are adapted to each other, which can not only assist in enhancing the stability of the valve plate 10 during movement, but also ensure the sealing performance at the contact surface between the limiting plates 12 and the limiting grooves 11, and can also assist in enhancing the anti-impact effect of the valve plate 10 inside the valve body 3, thereby effectively reducing the probability of damage to the internal structure of the gate valve. The flat surface structure of the lower surface of the main flange 4 facilitates the stable placement of the gate valve.

[0032] The mechanical connection gate valve of the present utility model can effectively enhance the sealing performance at the connection between the gate valve and the pipeline through the cooperation of the long bolts 5, the main flanges 4, the extrusion plates and the sealing rings 7. At the same time, through the cooperation of the valve seat 8, the sealing gasket 9 and the valve plate 10, the sealing performance during the opening and closing of the gate valve can be effectively enhanced, the wear rate of the valve plate 10 can be effectively reduced, the service life of the gate valve can be extended, and the settings of the valve seat 8, the sealing gasket 9 and the limiting plates 12 can assist in enhancing the anti-impact effect of the valve plate 10 inside the valve body 3, thereby assisting in reducing the probability of damage inside the gate valve.

Claims

1. Mechanical connection gate valve, comprising: Valve body (3), the upper surface of the valve body (3) is fixedly connected to the cover plate (2) by bolts, and the valve stem (1) is slidably connected to the cover plate (2) through a sealing sleeve, and the part of the valve stem (1) located inside the valve body (3) is fixedly connected to the valve plate (10), and its characteristics are: two main flanges (4) are symmetrically connected to both ends of the valve body (3), and the main flanges (4) are movably connected to the fastening plates (6) by long bolts (5), and sealing rings (7) are fixedly connected to both ends of the inner cavity of the valve body (3) close to the main flanges (4) through grooves, and valve seats (8) are symmetrically connected to the middle of the inner cavity of the valve body (3), and at the same time, a sealing gasket (9) is fixedly connected to one side of the valve seat (8) away from the sealing ring (7), and at the same time, limiting plates (12) are symmetrically connected to both sides of the middle of the inner cavity of the valve body (3), and limiting grooves (11) are correspondingly opened at positions of both sides of the valve plate (10) relative to the limiting plates (12).

2. The mechanical connection gate valve according to claim 1, characterized in that, The two fastening plates (6) movably connected to both ends of the valve body (3) by long bolts (5) are both square structures, and the corners of the outer side surfaces of the fastening plates (6) are arc-shaped structures, and through holes are correspondingly opened in the middle of the fastening plates (6) relative to the inner cavity of the valve body (3), the through holes are circular structures, and at the same time, the sizes of the through holes and the inner cavity of the valve body (3) are adapted to each other.

3. The mechanical connection gate valve according to claim 1, characterized in that, The two grooves opened at both ends of the inner cavity of the valve body (3) are both circular ring structures, and the sealing rings (7) fixedly connected in the grooves are circular ring structures, and the inner diameter of the sealing rings (7) is smaller than the inner diameters of both ends of the inner cavity of the valve body (3).

4. The mechanical connection gate valve according to claim 1, characterized in that, The two valve seats (8) fixedly connected to the middle of the inner cavity of the valve body (3) are both circular ring structures, and the inner diameter of the valve seats (8) is smaller than the inner diameter of the sealing rings (7), and a storage groove is opened above the middle of the inner cavity of the valve body (3), and the storage groove is a square structure, and at the same time, the whole valve body (3) is a T-shaped structure.

5. The mechanical connection gate valve according to claim 1, wherein, The sealing gasket (9) fixedly connected to the surface of the valve body (3) is a circular ring structure, and the axial section of the sealing gasket (9) is a right trapezoid structure, and one side of the sealing gasket (9) away from the valve seat (8) abuts against the surface of the valve plate (10), and at the same time, the inner diameter of the sealing gasket (9) is equal to the inner diameter of the valve seat (8), and the lower end of the sealing layer (14) is fixedly connected to the upper surface of the sealing gasket (9), the upper end of the sealing layer (14) is fixedly connected in the storage groove, and the whole sealing layer (14) is a concave structure, and the groove of the sealing layer (14) is adapted to the arc surface size of the upper surface of the sealing gasket (9).

6. The mechanical connection gate valve according to claim 1, characterized in that, The upper end of the valve plate (10) is a square structure, the lower end of the valve plate (10) is a semi-circular structure, and the lower end of the valve plate (10) is adapted to the size of the inner cavity of the valve body (3), the upper end of the valve body (3) is adapted to the size of the storage groove, and at the same time, the middle of the valve plate (10) is fixedly connected to the valve stem (1) through a fixing hole, and the pressing surfaces (13) on both sides of the lower end of the valve plate (10) are both inclined plane structures.

7. The mechanical connection gate valve according to claim 1, characterized in that, The two limiting plates (12) fixedly connected inside the valve body (3) are both strip-shaped structures, and the limiting grooves (11) opened on the side surfaces of the valve plate (10) are adapted to the sizes of the limiting plates (12), and the lower surfaces of the two main flanges (4) fixedly connected to both ends of the valve body (3) are both plane structures.

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