Straight-through type plane sealing stop valve

Abstract

The utility model discloses a straight-through type plane sealing stop valve, which belongs to the related technical field of stop valve equipment, and comprises a valve body, a connector is arranged above the valve body, a valve cover is arranged above the connector, two ends of the connector are in threaded connection with connecting bolts, and the valve cover is connected with the valve body. The center of the top of the valve deck is in threaded connection with a lifting screw, the top of the lifting screw is fixedly connected with a valve disc, and the lower portion of the top of the lifting screw is sleeved with an orientation mechanism. Through the arrangement of the orientation mechanism, during use, the positions of the lifting screw rod and the sealing conical plug are driven to descend through the valve cover, after equipment is closed, an orientation rod is rotated, and the side, close to the center of the lifting screw rod, of the orientation rod is inserted into a positioning groove, so that the state of the lifting screw rod after rotation is fixed; and then the position of the sealing conical plug is fixed, the situation that due to inertia, the lifting screw rotates unsubjectively is avoided, and therefore the sealing performance is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field related to stop valve equipment, in particular to a straight-through plane sealing stop valve. Background Art

[0002] Straight-through stop valve, it relies on the valve stem pressure to make the valve disc sealing surface and the valve seat sealing surface tightly combined to prevent the flow of medium, straight-through stop valve, it relies on the valve stem pressure to make the valve disc sealing surface and the valve seat sealing surface tightly combined to prevent the flow of medium. In the process of opening and closing, the friction between the sealing surfaces is small, wear-resistant, the opening height is small, and the manufacturing process performance is good. It is the most widely used valve in the industrial sector.

[0003] During the use of the currently used stop valve, since the sealing device adopts a threaded lifting structure for sealing, as the use time increases, the rotation of the screw is prone to inertia, thereby causing the sealing structure to rise and fall partially, so that gaps are easily formed in the seal, which in turn affects the sealing of the valve and causes circulation when it is closed. Utility Model Content

[0004] The utility model aims to provide a straight-through flat sealing stop valve to solve the problem in the above-mentioned background technology that the currently used stop valve, during use, since the sealing device adopts a threaded lifting structure for sealing, as the use time increases, the rotation of the screw is prone to inertial rotation, thereby driving the sealing structure to rise and fall partially, so that gaps are easily formed at the sealing part, which in turn affects the sealing of the valve and causes flow in the closed state.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a straight-through flat sealing stop valve, comprising a valve body, a connecting head is arranged above the valve body, a valve cover is arranged above the connecting head, both ends of the connecting head are threadedly connected with connecting bolts, a lifting screw is threadedly connected at the top center of the valve cover, the top of the lifting screw is fixedly connected with a valve disc, a directional mechanism is sleeved on the outer part below the top of the lifting screw, and a sealing mechanism is fixedly connected to the bottom of the lifting screw.

[0006] Preferably, the orienting mechanism includes an upper mounting ring, a first connecting frame is equidistantly distributed on the outside of the upper mounting ring, an orienting ring is fixedly connected below the first connecting frame, a second connecting frame is equidistantly distributed below the orienting ring, orienting rods are equidistantly distributed on one side of the orienting ring close to the center of the lifting screw, and a lower mounting ring is fixedly connected below the second connecting frame.

[0007] Preferably, the upper mounting ring and the lower mounting ring are fixedly connected via a first connecting frame and a second connecting frame, and the bottom of the lower mounting ring is fixedly connected to the top of the valve cover.

[0008] Preferably, the inner surface diameters of the upper mounting ring and the lower mounting ring are larger than the outer surface diameter of the lifting screw, and positioning grooves are equidistantly provided inside the lifting screw.

[0009] Preferably, the sealing mechanism includes a connecting plate, which is fixedly connected to the bottom of the lifting screw, a sealing rubber pad is fixedly connected to the bottom center of the connecting plate, a sealing cone plug is fixedly connected to the bottom center of the sealing rubber pad, positioning pins are evenly distributed on one side of the bottom of the connecting plate away from the center, and flow grooves are opened on both ends of the left and right ends of the valve body.

[0010] Preferably, the connecting plate forms a lifting structure through a lifting screw and a valve plate, and the sealing rubber pad and the sealing cone plug are both made of rubber material.

[0011] Preferably, the positioning pin is arranged in a triangle shape, and triangular grooves are equidistantly provided at the inner center of the valve body.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The straight-through flat sealing stop valve, through the setting of the directional mechanism, drives the position of the lifting screw and the sealing cone plug to drop through the valve cover when in use. After the equipment is closed, the directional rod is rotated, and the side of the directional rod close to the center of the lifting screw is inserted into the inside of the positioning groove, so as to fix the state of the lifting screw after rotation, and then fix the position of the sealing cone plug, so as to avoid the lifting screw from rotating involuntarily due to inertia, thereby ensuring the sealing performance;

[0014] 2. The straight-through flat sealing stop valve, through the setting of the sealing mechanism, when the connecting plate is driven to descend by the lifting screw, the lowering position of the connecting plate is fixed by the coordinated use of the positioning pin and the triangular groove, and the degree of descent of the connecting plate is determined. At the intersection of the flow grooves, the sealing cone plug is used to seal from the inside of the intersection, and then the sealing rubber pad is used to block from the top of the intersection. The simultaneous use of the two sealing methods can ensure the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the front section structure of the utility model;

[0017] Figure 3 This is a schematic diagram of a partial top-sectional structure of the directional ring of the utility model;

[0018] Figure 4It is a schematic diagram of a partial three-dimensional structure of the connection disk of the utility model.

[0019] In the figure: 1. valve body; 2. connecting head; 3. valve cover; 4. connecting bolt; 5. lifting screw; 6. valve disc; 7. orientation mechanism; 701. upper mounting ring; 702. first connecting frame; 703. orientation ring; 704. second connecting frame; 705. orientation rod; 706. lower mounting ring; 707. positioning groove; 8. sealing mechanism; 801. connecting disc; 802. sealing rubber pad; 803. sealing cone plug; 804. positioning pin; 805. flow groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides a technical solution: a straight-through plane sealing stop valve, comprising a valve body 1, a connecting head 2 is arranged above the valve body 1, a valve cover 3 is arranged above the connecting head 2, both ends of the connecting head 2 are threadedly connected with connecting bolts 4, a lifting screw 5 is threadedly connected at the top center of the valve cover 3, a valve disc 6 is fixedly connected to the top of the lifting screw 5, a directional mechanism 7 is sleeved on the outer part of the top of the lifting screw 5, and a sealing mechanism 8 is fixedly connected to the bottom of the lifting screw 5;

[0022] The orientation mechanism 7 includes an upper mounting ring 701, a first connecting frame 702 is evenly distributed outside the upper mounting ring 701, an orientation ring 703 is fixedly connected below the first connecting frame 702, a second connecting frame 704 is evenly distributed below the orientation ring 703, an orientation rod 705 is evenly distributed on one side of the orientation ring 703 close to the center of the lifting screw 5, a lower mounting ring 706 is fixedly connected below the second connecting frame 704, the upper mounting ring 701 and the lower mounting ring 706 are fixedly connected through the first connecting frame 702 and the second connecting frame 704, the bottom of the lower mounting ring 706 is fixedly connected to the top of the valve cover 3, and the upper mounting ring 701 and the lower mounting ring 706 are fixedly connected to the valve cover 3. The inner diameter of the mounting ring 706 is larger than the outer diameter of the lifting screw 5. Positioning grooves 707 are equidistantly provided inside the lifting screw 5. Through the setting of the orientation mechanism 7, when in use, the position of the lifting screw 5 and the sealing cone plug 803 are driven to drop through the valve cover 3. After the device is closed, the orientation rod 705 is rotated, and the side of the orientation rod 705 close to the center of the lifting screw 5 is inserted into the positioning groove 707, so as to fix the state of the lifting screw 5 after rotation, and then fix the position of the sealing cone plug 803, so as to avoid the lifting screw 5 from rotating involuntarily due to inertia, thereby ensuring the sealing performance.

[0023] The sealing mechanism 8 includes a connecting plate 801, which is fixedly connected to the bottom of the lifting screw 5, a sealing rubber pad 802 is fixedly connected to the bottom center of the connecting plate 801, a sealing cone plug 803 is fixedly connected to the bottom center of the sealing rubber pad 802, and positioning pins 804 are evenly distributed on the side away from the center of the bottom of the connecting plate 801. The left and right ends of the valve body 1 are provided with flow grooves 805. The connecting plate 801 forms a lifting structure through the lifting screw 5 and the valve disc 6. The sealing rubber pad 802 and the sealing cone plug 803 are both set to rubber material. The positioning pin 804 is evenly distributed on the side away from the center of the bottom of the connecting plate 801. 04 is set to be a triangle, and triangular grooves are equidistantly provided at the inner center of the valve body 1. Through the setting of the sealing mechanism 8, when the connecting plate 801 is driven to descend by the lifting screw 5, the lowering position of the connecting plate 801 is fixed by the cooperation of the positioning pin 804 and the triangular groove, and the descending degree of the connecting plate 801 is determined. At the intersection of the flow groove 805, the sealing cone plug 803 is used to seal from the inside of the intersection, and then the sealing gasket 802 is used to block from the top of the intersection. The simultaneous use of the two sealing methods can ensure the sealing performance.

[0024] Working principle: First, when the valve body 1 needs to be closed, the valve disc 6 is rotated, and the lifting screw 5 is driven to rotate through the valve disc 6, and the threaded connection structure between the lifting screw 5 and the valve cover 3 is used to drive the lifting screw 5 to rotate and descend, driving the position of the connecting disc 801 to descend, and the sealing cone plug 803 is deeply inserted into the interior of the intersection of the flow groove 805. During the continuous descent of the connecting disc 801, pressure is generated on the sealing gasket 802, so that the sealing gasket 802 blocks the intersection of the flow groove 805 from above, thereby ensuring the sealing performance through the double sealing structure, and fixing the lifting position through the positioning pin 804 and the triangular groove;

[0025] After the lifting screw 5 descends and completes closing the valve body 1, the directional rod 705 is rotated and the side of the directional rod 705 close to the center of the lifting screw 5 is inserted into the interior of the positioning groove 707, thereby fixing the state of the lifting screw 5 after rotation, and then fixing the position of the sealing cone plug 803 to avoid the lifting screw 5 from rotating involuntarily due to inertia, thereby ensuring the sealing.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A straight-through flat sealing stop valve, characterized in that: The valve body (1) comprises a connecting head (2) arranged above the valve body (1), a valve cover (3) arranged above the connecting head (2), connecting bolts (4) being threadedly connected to both ends of the connecting head (2), a lifting screw (5) being threadedly connected to the top center of the valve cover (3), a valve disc (6) being fixedly connected to the top of the lifting screw (5), a directional mechanism (7) being sleeved on the outer portion below the top of the lifting screw (5), and a sealing mechanism (8) being fixedly connected to the bottom of the lifting screw (5).

2. A straight-through flat sealing stop valve according to claim 1, characterized in that: The orientation mechanism (7) comprises an upper mounting ring (701), a first connecting frame (702) is evenly distributed outside the upper mounting ring (701), an orientation ring (703) is fixedly connected below the first connecting frame (702), a second connecting frame (704) is evenly distributed below the orientation ring (703), orientation rods (705) are evenly distributed on one side of the orientation ring (703) close to the center of the lifting screw (5), and a lower mounting ring (706) is fixedly connected below the second connecting frame (704).

3. A straight-through flat sealing stop valve according to claim 2, characterized in that: The upper mounting ring (701) and the lower mounting ring (706) are fixedly connected via a first connecting frame (702) and a second connecting frame (704), and the bottom of the lower mounting ring (706) is fixedly connected to the top of the valve cover (3).

4. A straight-through flat sealing stop valve according to claim 2, characterized in that: The inner surface diameters of the upper mounting ring (701) and the lower mounting ring (706) are larger than the outer surface diameter of the lifting screw (5), and positioning grooves (707) are equidistantly provided inside the lifting screw (5).

5. The straight-through flat sealing stop valve according to claim 1, characterized in that: The sealing mechanism (8) comprises a connecting plate (801), wherein the connecting plate (801) is fixedly connected to the bottom of the lifting screw (5), a sealing rubber pad (802) is fixedly connected to the bottom center of the connecting plate (801), a sealing cone plug (803) is fixedly connected to the bottom center of the sealing rubber pad (802), positioning pins (804) are evenly distributed on one side of the bottom of the connecting plate (801) away from the center, and flow grooves (805) are provided at both left and right ends inside the valve body (1).

6. A straight-through flat sealing stop valve according to claim 5, characterized in that: The connecting plate (801) forms a lifting structure through a lifting screw rod (5) and a valve plate (6), and the sealing rubber pad (802) and the sealing cone plug (803) are both made of rubber material.

7. The straight-through flat sealing stop valve according to claim 5, characterized in that: The positioning pin (804) is arranged in a triangle shape, and triangular grooves are equidistantly provided at the inner center of the valve body (1).

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