Double-gate-plate gate valve

Abstract

The utility model relates to the technical field of gate valves, in particular to a double-gate-plate gate valve which comprises a double-gate-plate gate valve body, a buffer plate and a transmission mechanism. A buffer box is arranged at the feeding end of the double-gate-plate gate valve body. The buffer plate can be slidably adjusted in the vertical direction of the inner wall of the buffer box, and multiple sets of flow dividing holes are formed in the buffer plate. The buffer plate is in linkage with a valve column on the double-gate-plate gate valve body through a transmission mechanism. The transmission mechanism is driven by the valve rod to drive the buffer plate to be attached to the inner wall of the buffer box, media are shunted through the multiple groups of shunting holes, impact of the media and large impurities in the media on the flashboard is reduced, damage is reduced, and the service life is prolonged. Meanwhile, large impurities in a medium can be filtered and intercepted through the buffer plate and the flow dividing holes, and the situation that when a gate plate in the double-gate-plate gate valve body is opened subsequently, the large impurities enter the downstream through the valve seat to cause blockage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a double-disc gate valve. Background Art

[0002] Double disc gate valve is suitable for use as closed-circuit equipment on pipelines with water and sewage as the medium. It is widely used in petroleum, chemical, pharmaceutical, electric power and other industries. The double disc gate valve consists of a valve body and a driving mechanism installed in the valve body, a valve stem, a valve seat and two sets of gate plates. The driving mechanism drives the valve stem to move, causing the gate plate to reciprocate to control the opening and closing of the valve body.

[0003] The Chinese patent with the authorization announcement number CN221097521U discloses a double-gate power station gate valve, including a valve body, a gate and a valve column. A mounting groove is provided in the center of the valve body, a valve seat is fixedly installed inside the mounting groove, a first step is provided on the inner wall of the top of the valve body, a second step is provided at the end of the first step away from the center of the valve body, the gate includes two identical and symmetrically arranged left gates and right gates, the gates are arranged between the valve seats on both sides, and the valve column is vertically arranged inside the valve body. The utility model pushes the gate to move into the inside of the valve body and enters the inside of the valve seat by rotating the valve column, and then the valve column continues to move, compressing and pushing the left gate and the right gate to move toward the valve seat on the same side, so as to close the gate valve, avoid the wear of the gate valve caused by direct friction between the gate and the valve seat, and extend the service life of the gate valve.

[0004] However, the above-mentioned disclosed scheme has the following shortcomings: when the above-mentioned double-gate power station gate valve is in use, when the gate closes the two sets of valve seats, the medium will impact the left valve seat and the left gate under the action of inertia, and when there are large impurities in the medium, the impurities will flow inside the valve body along with the medium, increasing the impact force, causing the impurities to rub and collide with the valve seat and the left gate, accelerating the damage of internal components and shortening the service life. Utility Model Content

[0005] The utility model aims to provide a double-disc gate valve in view of the problems existing in the background technology.

[0006] The technical solution of the utility model: a double-disc gate valve, comprising a double-disc gate valve body, a buffer box is arranged at its feed end; a buffer plate, which can be slid and adjusted in the vertical direction along the inner wall of the buffer box, and a plurality of groups of diversion holes are arranged on the buffer plate, and the diversion holes correspond to the gate plates inside the double-disc gate valve body; and a transmission mechanism, which is arranged on the outer wall of the double-disc gate valve body, and the buffer plate is linked to the valve column on the double-disc gate valve body through the transmission mechanism.

[0007] Preferably, the transmission mechanism includes a transmission assembly; a screw, whose bottom end is rotatably connected to the outer wall of the double-disc gate valve body, and the screw is connected to the valve column through the transmission assembly; and a movable seat, one end of which is threadedly connected to the screw and the other end is equipped with a push-pull rod, which is connected to the top of the buffer plate.

[0008] Preferably, the buffer box is provided with a cleaning mechanism, which includes

[0009] The cleaning rod is slidably connected to the top of the buffer box, and an elastic member is sleeved on the outside of the cleaning rod; the bottom end of the cleaning rod extends to the inside of the buffer box and is equipped with a cleaning brush, and the bristles on the cleaning brush are in contact with the buffer plate.

[0010] Preferably, a material receiving box is detachably mounted on the inner bottom end of the buffer box, and the material receiving box corresponds to the cleaning brush and the buffer plate.

[0011] Preferably, a top cover is detachably mounted on the top of the buffer box by bolts, and the cleaning rod is slidably connected to the top cover.

[0012] Preferably, a guide groove is provided between the top cover and the buffer box, and the buffer plate is slidably connected to the guide groove.

[0013] Compared with the prior art, the above-mentioned technical scheme of the utility model has the following beneficial technical effects: the utility model drives the transmission mechanism through the valve column to drive the buffer plate to fit with the inner wall of the buffer box, and then diverts the medium through the multi-group diversion holes, reducing the impact of the medium and larger impurities in the medium on the gate plate, reducing damage, and extending the service life. At the same time, larger impurities in the medium can be filtered and intercepted through the buffer plate and the diversion holes; the setting of the cleaning mechanism facilitates the cleaning and collection of larger impurities intercepted on the buffer plate, thereby preventing larger impurities from entering the downstream through the valve seat and causing blockage when the gate inside the double-gate gate valve body is opened later. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the connection between the buffer plate and the buffer box of the utility model;

[0016] Figure 3 This is a rear view of the buffer plate of the utility model;

[0017] Figure 4 It is a schematic diagram of the connection mode between the cleaning mechanism and the buffer box of the utility model.

[0018] Figure numerals: 1. double-disc gate valve body; 101. valve column; 2. driving gear; 201. driven gear; 202. screw; 203. moving seat; 204. push-pull rod; 3. buffer box; 301. top cover; 302. guide groove; 303. material receiving box; 4. buffer plate; 401. diverter hole; 5. cleaning rod; 501. cleaning brush; 502. elastic member. DETAILED DESCRIPTION

[0019] Embodiment 1

[0020] like Figures 1 to 3 As shown, a double-disc gate valve proposed in the utility model comprises a double-disc gate valve body 1, a buffer plate 4 and a transmission mechanism; a buffer box 3 is arranged at the feeding end of the double-disc gate valve body 1; the buffer plate 4 can be slidably adjusted in the vertical direction along the inner wall of the buffer box 3, and a plurality of groups of diversion holes 401 are arranged on the buffer plate 4, and the diversion holes 401 correspond to the gate plates inside the double-disc gate valve body 1; the transmission mechanism is arranged on the outer wall of the double-disc gate valve body 1, and the buffer plate 4 is linked to the valve column 101 on the double-disc gate valve body 1 through the transmission mechanism.

[0021] Furthermore, the transmission mechanism includes a transmission assembly, a screw 202 and a moving seat 203; the bottom end of the screw 202 is rotatably connected to the outer wall of the double-disc gate valve body 1, the screw 202 is connected to the valve column 101 through a transmission assembly, the transmission assembly is composed of a driving gear 2 and a driven gear 201 meshingly connected therewith, the driving gear 2 and the driven gear 201 are respectively installed on the screw 202 and the valve column 101; one end of the moving seat 203 is threadedly connected to the screw 202, and the other end is equipped with a push-pull rod 204, and the push-pull rod 204 is connected to the top of the buffer plate 4.

[0022] In this embodiment, the double-disc gate valve body 1 is a prior art. Rotating the valve column 101 can drive the gate at the bottom end of the valve column 101 to move downward, and the valve seat inside the double-disc gate valve body 1 is blocked. The specific structure and principle are in the patent with the authorization announcement number CN221097521U, and will not be repeated here. The connecting flanges at both ends of the double-disc gate valve body 1 are installed in appropriate positions by bolts, and the valve column 101 is rotated to connect and block the gate at its bottom with the valve seat inside the double-disc gate valve body 1. At the same time, when the valve column 101 rotates, the transmission component drives the gate to move downward. The movable screw 202 rotates, and the other end of the movable seat 203 on the screw 202 is connected to the buffer plate 4 through the push-pull rod 204. When the screw 202 rotates, the buffer plate 4 is driven to slide downward along the inner wall of the buffer box 3 through the movable seat 203 and the push-pull rod 204, and then the buffer plate 4 is driven to fit with the inner wall of the buffer box 3. Through the action of the buffer plate 4 and the diversion hole 401, the medium at the input end of the double-disc gate valve body 1 can be diverted and buffered, reducing the impact of the medium and larger impurities in the medium on the gate plate, reducing damage and extending the service life.

[0023] Embodiment 2

[0024] like Figure 1 , Figure 2 and Figure 4 As shown, a double-disc gate valve proposed by the utility model, compared with the first embodiment, is provided with a cleaning mechanism on the buffer box 3, and the cleaning mechanism includes a cleaning rod 5; the cleaning rod 5 is slidably connected to the top of the buffer box 3, and an elastic member 502 is sleeved on the outside of the cleaning rod 5, and the elastic member 502 is set as a return spring; the bottom end of the cleaning rod 5 extends to the inside of the buffer box 3 and a cleaning brush 501 is installed, and the bristles on the cleaning brush 501 are in contact with the buffer plate 4.

[0025] Furthermore, a material receiving box 303 is detachably installed at the inner bottom of the buffer box 3, and the material receiving box 303 corresponds to the cleaning brush 501 and the buffer plate 4. The material receiving box 303 is slidably connected to the inner wall of the buffer box 3, and the material receiving box 303 is connected to the buffer box 3 by bolts.

[0026] Furthermore, a top cover 301 is detachably mounted on the top of the buffer box 3 by means of bolts, and the cleaning rod 5 is slidably connected to the top cover 301 .

[0027] Furthermore, a guide groove 302 is provided between the top cover 301 and the buffer box 3, and the buffer plate 4 is slidably connected to the guide groove 302. The top cover 301 and the buffer box 3 are easy to disassemble and assemble, the cleaning brush 501 and the cleaning rod 5 are detachably connected by bolts, and the buffer plate 4 and the push-pull rod 204 are detachably connected by bolts, and can be adjusted by the transmission mechanism, and then the cleaning brush 501 and the buffer plate 4 are moved out of the buffer box 3 for inspection or replacement.

[0028] In this embodiment, when the gate inside the double-disc gate valve body 1 closes the valve seat, the buffer plate 4 and the guide groove 302 slide and close to buffer the medium at the input end of the double-disc gate valve body 1. At the same time, larger impurities in the medium will also be intercepted. The medium is diverted by the diverter hole 401 to reduce the impact on the gate, and the larger impurities are filtered and intercepted by the buffer plate 4 and the diverter hole 401. At this time, the cleaning rod 5 is slid and pressed downward along the top cover 301, so that the elastic member 502 is compressed, and then the cleaning rod 5 drives the cleaning brush 501 to move downward inside the buffer box 3, and then the buffer is filtered by the cleaning brush 501. The larger impurities intercepted on the punch plate 4 are pushed downward until they fall into the receiving box 303. When the pressure on the cleaning rod 5 is released, the cleaning brush 501 is driven to slide upward along the buffer plate 4 under the elastic recovery action of the elastic member 502. This reciprocating process can clean the buffer plate 4 to prevent larger impurities from entering the downstream through the valve seat and causing blockage when the internal gate plate of the double-gate gate valve body 1 is subsequently opened. The bolts between the receiving box 303 and the buffer box 3 are regularly removed, and the receiving box 303 is slid and pulled out along the buffer box 3 to clean the impurities collected in the receiving box 303.

[0029] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A double-disc gate valve, characterized in that: include A double-disc gate valve body (1) is provided with a buffer box (3) at its inlet end; A buffer plate (4) which can be slidably adjusted in a vertical direction along the inner wall of the buffer box (3); a plurality of flow diversion holes (401) are provided on the buffer plate (4); the flow diversion holes (401) correspond to the gate plates inside the double-gate gate valve body (1); And a transmission mechanism is arranged on the outer wall of the double-disc gate valve body (1), and the buffer plate (4) is linked to the valve column (101) on the double-disc gate valve body (1) through the transmission mechanism.

2. A double-disc gate valve according to claim 1, characterized in that: Transmission mechanism includes Transmission components; A screw (202), the bottom end of which is rotatably connected to the outer wall of the double-disc gate valve body (1), and the screw (202) is connected to the valve column (101) via a transmission assembly; And a movable seat (203), one end of which is threadedly connected to the screw rod (202), and the other end of which is installed with a push-pull rod (204), and the push-pull rod (204) is connected to the top end of the buffer plate (4).

3. A double-disc gate valve according to claim 1, characterized in that: The buffer box (3) is provided with a cleaning mechanism, which includes A cleaning rod (5) is slidably connected to the top of the buffer box (3), and an elastic member (502) is sleeved on the outside of the cleaning rod (5); the bottom end of the cleaning rod (5) extends to the inside of the buffer box (3) and is provided with a cleaning brush (501), and the bristles on the cleaning brush (501) are in contact with the buffer plate (4).

4. A double-disc gate valve according to claim 3, characterized in that: A material receiving box (303) is detachably mounted on the inner bottom of the buffer box (3), and the material receiving box (303) corresponds to the cleaning brush (501) and the buffer plate (4).

5. A double-disc gate valve according to claim 3, characterized in that: A top cover (301) is detachably mounted on the top of the buffer box (3) via bolts, and the cleaning rod (5) is slidably connected to the top cover (301).

6. A double-disc gate valve according to claim 5, characterized in that: A guide groove (302) is provided between the top cover (301) and the buffer box (3), and the buffer plate (4) is slidably connected to the guide groove (302).

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