Ball valve body sealing structure

Abstract

The utility model discloses a ball valve body sealing structure which comprises a shell and connecting pipes welded to the two ends of the shell, a pressing mechanism is arranged in the shell and comprises a base, a driving gear and a driven gear, a two-way lead screw is arranged in the middle of the driven gear, and the two-way lead screw is connected with the base. Driving cylinders are arranged at the two ends of the bidirectional lead screw, a lifting plate is arranged on one side of each driving cylinder, a main valve seat is arranged on one side of each lifting plate, a connecting mechanism is arranged on the outer side of a connecting pipe, and a driving mechanism is arranged above the shell; a driving gear is driven by a rotary disc to rotate, the driving gear drives an engaged driven gear to rotate, so that a plurality of two-way lead screws are driven to synchronously rotate, the two-way lead screws drive driving cylinders at the two ends to synchronously get close to or get away from each other, and therefore a lifting plate is driven to press a main valve seat, and the main valve seat and a valve element are tightly pressed; the rubber valve seat is prevented from expanding with heat and contracting with cold due to aging and influence of media, and the sealing performance of the valve seat and the valve element is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve body sealing technical field especially relates to a ball valve body sealing structure. BACKGROUND

[0002] In our country, ball valve is widely used in petroleum refining, long -distance pipeline, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel industry etc. in national economy, occupies the pivotal position. It has the action of rotating 90 degrees, plug body is spherical, has circular through -hole or passageway through its axis. Ball valve is mainly used for cutting off, distribution and changing the flow direction of medium in pipeline, it only needs to rotate 90 degrees and small torque to close tightly. Ball valve is most suitable for switch, cut -off valve uses.

[0003] In the prior art, the Chinese utility model patent with the authorization announcement number CN220668450U provides a ball valve seat and valve body sealing structure, including valve body and valve seat, the front surface of valve seat is abutted with ball to form first sealing surface, the back surface of valve seat is abutted with valve body to form second sealing surface, second sealing surface is conical surface structure, and the diameter of conical surface structure near one end of ball is greater than the diameter of the end away from ball. The second sealing surface between the valve seat and the valve body of the utility model adopts the sealing mode of conical surface structure, instead of the sealing mode of sealing element made of non-metallic material in the prior art. The valve seat and the valve body are tightly sealed by the medium acting force, and the valve seat and the ball are tightly sealed. Compared with the prior art, it has good durability and long service life under harsh medium conditions such as strong acid and alkali and high radiation.

[0004] Compared with the prior art, the existing part of ball valve adopts rubber valve seat to seal the valve core, and the rubber valve seat is easy to age and is affected by the medium to expand and contract with heat, which affects the sealing performance of the valve seat and the valve core.

[0005] Therefore, a ball valve body sealing structure is needed. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the defects of prior art, and provides a ball valve body sealing structure.

[0007] The utility model solves its technical problem by the following technical scheme: including shell and connecting pipe welded at both ends of shell, the inside of shell is provided with pressing mechanism, the pressing mechanism includes base, the base is welded in the below of shell, the inside of base is provided with drive gear, the outside of drive gear is provided with driven gear, the middle position of driven gear is provided with bidirectional screw rod, the both ends of bidirectional screw rod are provided with drive cylinder, the side of drive cylinder is provided with lifting plate, the side of lifting plate is provided with main valve seat, the outside of connecting pipe is provided with connecting mechanism, the above of shell is provided with driving mechanism.

[0008] As a further scheme of the utility model: the connecting mechanism includes a fixed frame, the fixed frame is fixed on both ends of the shell through bolts, a plurality of screw rods are arranged at the middle position of the fixed frame, one end of the screw rod is provided with a pressing plate, the outer side of the connecting pipe is provided with a plurality of clamping grooves, and the outer wall of the pressing plate is provided with a rubber pad.

[0009] As a further scheme of the utility model: the driving mechanism includes a support, the support is welded on the upper side of the shell, one end of the support is provided with a worm, the middle position of the shell is provided with a driving column, one end of the driving column is provided with a valve core, one end of the driving column is provided with a worm wheel, and the worm wheel is in transmission connection with the worm.

[0010] As a further scheme of the utility model: the inner wall of the shell is provided with a side valve seat, and the side valve seat is matched with the main valve seat.

[0011] As a further scheme of the utility model: the middle position of the driving gear is provided with a rotating disc, and the outer side of the bidirectional screw rod is provided with a telescopic cover.

[0012] As a further scheme of the utility model: one end of the worm is provided with a handle, and the outer side of the worm wheel and the worm is provided with a protective shell.

[0013] As a further scheme of the utility model: one side of the shell is provided with a transparent observation window.

[0014] As above, since the above technical scheme is adopted, the utility model has the beneficial effects that:

[0015] 1. By arranging the rotating disc, the rotating disc drives the driving gear to rotate, the driving gear drives the meshed driven gear to rotate, thereby driving the plurality of bidirectional screw rods to rotate synchronously, the bidirectional screw rods drive the driving cylinders at both ends to approach or move away synchronously, thereby driving the lifting plate to press the main valve seat, the main valve seat and the valve core are pressed tightly, the aging of the rubber valve seat and the thermal expansion and contraction of the rubber valve seat due to the influence of the medium are avoided, and the sealing property of the valve seat and the valve core is ensured.

[0016] 2. By arranging the worm, the worm drives the worm wheel to rotate, the worm wheel drives the valve core to rotate through the driving column, the ball valve is opened or closed, since the worm wheel and the worm have self-locking property, the valve core can be prevented from reversing due to the influence of water flow, and the stability of the ball valve is ensured.

[0017] 3. By arranging the plurality of screw rods, the screw rods drive the pressing plate to lift under the action of the threads, the water pipes connected at both ends of the ball valve are pressed into the clamping grooves under the action of the rubber pad, the water pipes and the connecting pipes are prevented from separating, and the safety of the ball valve is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A schematic diagram of an isometric structure according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of the oblique sectional view structure according to an embodiment of the present invention is shown;

[0020] Figure 3 The present invention provides an embodiment of the present invention. Figure 2 A magnified view of the structure at point A in the middle;

[0021] Figure 4 A schematic diagram of the front cross-sectional structure according to an embodiment of the present invention is shown;

[0022] Figure 5 The present invention provides an embodiment of the present invention. Figure 4 A magnified schematic diagram of the structure at point B in the middle;

[0023] Figure 6 A side sectional view of the structure according to an embodiment of the present invention is shown;

[0024] Figure 7 The present invention provides an embodiment of the present invention. Figure 6 A magnified schematic diagram of the structure at point C.

[0025] Legend:

[0026] 100. Outer shell; 200. Connecting pipe; 110. Side valve seat; 120. Turntable; 130. Telescopic cover; 140. Rotary handle; 150. Protective shell; 160. Transparent observation window; 101. Base; 102. Drive gear; 103. Driven gear; 104. Two-way lead screw; 105. Drive cylinder; 106. Lifting plate; 107. Main valve seat; 201. Fixing bracket; 202. Screw; 203. Pressure plate; 204. Slot; 205. Rubber pad; 301. Bracket; 302. Worm gear; 303. Drive column; 304. Valve core; 305. Worm wheel. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] Example 1:

[0031] like Figures 1-7 As shown, a ball valve body sealing structure includes a housing 100 and connecting pipes 200 welded to both ends of the housing 100. A pressing mechanism is provided inside the housing 100. The pressing mechanism includes a base 101, which is welded to the lower part of the housing 100. A drive gear 102 is rotatably connected inside the base 101. A driven gear 103 meshes with the outer side of the drive gear 102. A double-acting screw 104 is bolted to the middle position of the driven gear 103. Drive cylinders 105 are drivenly connected to both ends of the double-acting screw 104. A lifting plate 106 is bolted to one side of the drive cylinder 105. A main valve seat 107 is bolted to one side of the lifting plate 106. A connecting mechanism is provided on the outer side of the connecting pipes 200. A drive mechanism is provided on the top of the outer casing 100. A turntable 120 is bolted to the middle position of the drive gear 102. A telescopic cover 130 is bolted to the outer side of the bidirectional lead screw 104. The drive mechanism includes a bracket 301, which is welded to the top of the outer casing 100. A worm gear 302 is rotatably connected to one end of the bracket 301. A drive column 303 is rotatably connected to the middle position of the outer casing 100. A valve core 304 is welded to one end of the drive column 303. A worm wheel 305 is bolted to one end of the drive column 303. The worm wheel 305 is connected to the worm gear 302. A handle 140 is bolted to one end of the worm gear 302. A protective shell 150 is bolted to the outer side of the worm wheel 305 and the worm gear 302.

[0032] In this embodiment, a turntable 120 is provided, which drives the drive gear 102 to rotate. The drive gear 102 drives the meshing driven gear 103 to rotate, thereby driving multiple bidirectional lead screws 104 to rotate synchronously. The bidirectional lead screws 104 drive the drive cylinders 105 at both ends to move closer or further away synchronously, thereby driving the lifting plate 106 to press the main valve seat 107, pressing the main valve seat 107 and the valve core tightly, avoiding the rubber valve seat from expanding and contracting due to aging and the influence of the medium, and ensuring the sealing of the valve seat and the valve core. A worm gear 302 is provided, which drives the worm wheel 305 to rotate. The worm wheel 305 drives the valve core 304 to rotate through the drive column 303, opening or closing the ball valve. Since the worm wheel 305 and the worm gear 302 have self-locking properties, the valve core 304 can be prevented from reversing due to the influence of water flow, ensuring the stability of the ball valve operation.

[0033] Example 2:

[0034] like Figures 1-6 As shown, a ball valve body sealing structure includes a connecting mechanism comprising a fixing frame 201, which is fixed to both ends of a housing 100 by bolts. Multiple screws 202 are threadedly connected to the middle position of the fixing frame 201. A pressure plate 203 is rotatably connected to one end of each screw 202. Multiple slots 204 are cut on the outer side of the connecting pipe 200. A rubber gasket 205 is fixed to the outer wall of the pressure plate 203 by bolts. A side valve seat 110 is fixed to the inner wall of the housing 100 by bolts. The side valve seat 110 mates with a main valve seat 107. A transparent observation window 160 is fixed to one side of the housing 100 by bolts.

[0035] In this embodiment, multiple screws 202 are provided. By turning the multiple screws 202, the screws 202 drive the pressure plate 203 to rise and fall under the action of the threads. Under the action of the rubber pad 205, the water pipes connected to both ends of the ball valve are pressed into the slot 204 to prevent the water pipes from detaching from the connecting pipe 200 and to ensure the safety of the ball valve operation.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A ball valve body sealing structure, characterized in that, The device includes an outer shell (100) and connecting pipes (200) welded to both ends of the outer shell (100). A pressing mechanism is provided inside the outer shell (100). The pressing mechanism includes a base (101) welded to the bottom of the outer shell (100). A drive gear (102) is provided inside the base (101). A driven gear (103) is provided on the outside of the drive gear (102). A double-acting screw (104) is provided in the middle of the driven gear (103). A drive cylinder (105) is provided at both ends of the double-acting screw (104). A lifting plate (106) is provided on one side of the drive cylinder (105). A main valve seat (107) is provided on one side of the lifting plate (106). A connecting mechanism is provided on the outside of the connecting pipes (200). A driving mechanism is provided on the top of the outer shell (100).

2. The ball valve body sealing structure according to claim 1, characterized in that, The connecting mechanism includes a fixing frame (201), which is fixed to both ends of the outer shell (100) by bolts. Multiple screws (202) are provided in the middle of the fixing frame (201), and a pressure plate (203) is provided at one end of the screws (202). Multiple slots (204) are provided on the outside of the connecting pipe (200), and a rubber pad (205) is provided on the outer wall of the pressure plate (203).

3. The ball valve body sealing structure according to claim 1, characterized in that, The drive mechanism includes a bracket (301) welded to the top of the housing (100). A worm gear (302) is provided at one end of the bracket (301). A drive column (303) is provided at the middle position of the housing (100). A valve core (304) is provided at one end of the drive column (303). A worm wheel (305) is provided at one end of the drive column (303). The worm wheel (305) is connected to the worm gear (302) in a transmission connection.

4. The ball valve body sealing structure according to claim 1, characterized in that, The inner wall of the housing (100) is provided with a side valve seat (110), which cooperates with the main valve seat (107).

5. The ball valve body sealing structure according to claim 1, characterized in that, A turntable (120) is provided at the middle position of the drive gear (102), and a telescopic cover (130) is provided on the outer side of the bidirectional lead screw (104).

6. The ball valve body sealing structure according to claim 3, characterized in that, One end of the worm (302) is provided with a handle (140), and the worm wheel (305) and the outer side of the worm (302) are provided with a protective shell (150).

7. The ball valve body sealing structure according to claim 1, characterized in that, A transparent observation window (160) is provided on one side of the outer casing (100).

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