An integrated knife gate valve seat

Abstract

The utility model discloses an integrated knife gate valve seat, which relates to the technical field of knife gate valves, including a bracket, a hand wheel and a scraper assembly, wherein a valve seat body is arranged at the bottom of the bracket, and connecting plates are installed at both ends of the valve seat body, the hand wheel is arranged at the top of the bracket, and the valve stem at the bottom of the hand wheel passes through the bracket and is connected with a gate plate, the scraper assembly is installed at the bottom of the valve seat body, and the scraper assembly includes an additional box, a forward and reverse motor, a drive shaft, an eccentric wheel, a drive rod, a reset spring 1, an inner liner and a scraper ring, and a forward and reverse motor is installed on the right side of the additional box, and the output end of the forward and reverse motor passes through the right side of the additional box and is connected with the drive shaft. In the integrated knife gate valve seat, when the filter follows the displacement of the inner liner and the scraper ring, the support rod retracts through the reset spring 2 to drive the brush plate to move on the surface of the filter, thereby removing impurities blocked at the mesh of the filter, and ensuring the flow rate of fluid in the valve seat body.

Description

Technical Field

[0001] The utility model relates to the technical field of knife gate valves, in particular to an integrated knife gate valve seat. Background Art

[0002] Knife gate valve is also called knife-type gate valve, knife gate valve, slurry valve, mud valve. Its opening and closing parts are gates. The movement direction of the gate is perpendicular to the direction of the fluid. The medium is cut off by the blade-shaped gate that can cut fiber materials. The knife gate valve is mainly composed of valve body, valve seat, O-ring, gate, valve stem, bracket and other parts. The valve seat is mainly used to connect the valve body and the sealing pipe.

[0003] The sealing surface of the existing one-piece knife gate valve seat is prone to accumulate impurities after long-term use. When the gate is lowered, the impurities will be pressed tighter and tighter, causing the gate to get stuck or not close tightly.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and an integrated knife gate valve seat is proposed. Utility Model Content

[0005] The utility model aims to provide an integrated knife gate valve seat to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an integrated knife gate valve seat, comprising a bracket, a handwheel and a scraper assembly, a valve seat body is arranged at the bottom of the bracket, and connecting plates are installed at both ends of the valve seat body, the handwheel is arranged at the top of the bracket, and the valve stem at the bottom of the handwheel passes through the bracket and is connected to the gate plate, the scraper assembly is installed at the bottom of the valve seat body, and the scraper assembly comprises an additional box, a forward and reverse motor, a driving shaft, an eccentric wheel, a driving rod, a reset spring 1, an inner liner and a scraper ring, a forward and reverse motor is installed on the right side of the additional box, and the output end of the forward and reverse motor passes through the right side of the additional box and is connected to the driving shaft, an eccentric wheel is arranged on the outside of the driving shaft, and a reset spring 1 is connected to the inner surface of the additional box, and a driving rod is arranged on the other end of the reset spring 1, and an inner liner is fixed to one end of the driving rod close to the transverse central axis inside the valve seat body, and a scraper ring is sleeved on the outer side of the inner liner.

[0007] Furthermore, the gate plate passes through the opening at the top of the valve seat body, and the bracket, the valve seat body, the connecting plate and the additional box are integrated into a structure.

[0008] Furthermore, the wall scraping assembly also includes a filter screen, and the filter screen is installed inside the inner liner.

[0009] Furthermore, two additional boxes are symmetrically arranged about the transverse center axis of the valve seat body, and the eccentric wheel and the driving rod are tightly fitted.

[0010] Furthermore, the top and bottom of the valve seat body are both provided with through grooves, and the driving rod passes through the through grooves.

[0011] Furthermore, the driving rod is elastically connected to the additional box via a return spring 1, and the outer diameter of the scraper ring matches the inner diameter of the valve seat body.

[0012] Furthermore, the groove on the inner surface of the valve seat body is connected to a support rod via a rotating shaft, and the other end of the support rod is connected to a brush plate via a rotating shaft.

[0013] Furthermore, a second return spring is installed on one side of the support rod, and the support rod is elastically connected to the valve seat body through the second return spring.

[0014] The utility model provides an integrated knife gate valve seat, which has the following beneficial effects:

[0015] 1. The upper and lower groups of forward and reverse motors of the utility model respectively drive the driving shaft and eccentric wheel connected thereto to rotate counterclockwise and clockwise, and the eccentric wheel pushes the driving rod to squeeze the reset spring, so that the driving rod drives the inner liner and the scraper ring to move inside the valve seat body, thereby scraping off the impurities accumulated on the sealing surface to prevent the impurities from being stuck between the gate plate and the valve seat body when the gate plate falls.

[0016] 2. When the filter screen of the utility model follows the displacement of the inner liner and the scraper ring, the support rod retracts through the reset spring 2 to drive the brush plate to move on the filter screen surface, thereby removing impurities blocked at the filter screen mesh and ensuring the flow rate of fluid in the valve seat body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an integrated knife gate valve seat of the utility model;

[0018] Figure 2 It is a schematic diagram of the side cross-sectional structure of a valve seat body of an integrated knife gate valve seat of the utility model;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of a valve seat body of an integrated knife gate valve seat of the utility model.

[0020] In the figure: 1. bracket; 2. valve seat body; 3. connecting plate; 4. hand wheel; 5. gate; 6. scraper assembly; 601. additional box; 602. forward and reverse motor; 603. drive shaft; 604. eccentric wheel; 605. drive rod; 606. reset spring 1; 607. liner; 608. scraper ring; 609. filter; 7. support rod; 8. reset spring 2; 9. brush plate; 10. through groove. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] like Figures 1 to 3 As shown, an integrated knife gate valve seat comprises a bracket 1 and a hand wheel 4, a valve seat body 2 is arranged at the bottom of the bracket 1, and connecting plates 3 are installed at both ends of the valve seat body 2, the hand wheel 4 is arranged at the top of the bracket 1, and the valve stem at the bottom of the hand wheel 4 passes through the bracket 1 and is connected to the gate plate 5, a scraper assembly 6 is installed at the bottom of the valve seat body 2, and the scraper assembly 6 comprises an additional box 601, a forward and reverse motor 602, a drive shaft 603, an eccentric wheel 604, a drive rod 605, a return spring 606, an inner liner 607 and a scraper ring 608, a forward and reverse motor 602 is installed on the right side of the additional box 601, and the output end of the forward and reverse motor 602 passes through the right side of the additional box 601 and is connected to the drive shaft 603, an eccentric wheel 604 is arranged on the outside of the drive shaft 603, and a return spring 606 is connected to the inner surface of the additional box 601, and the return spring 606 is connected to the inner surface of the additional box 601. A driving rod 605 is provided at the other end of 06, and an inner lining 607 is fixed to the end of the driving rod 605 close to the inner transverse central axis of the valve seat body 2, and a scraper ring 608 is sleeved on the outer side of the inner lining 607, the gate 5 passes through the opening at the top of the valve seat body 2, and the bracket 1, the valve seat body 2, the connecting plate 3 and the additional box 601 are in an integrated structure, the scraper assembly 6 also includes a filter screen 609, and a filter screen 609 is installed inside the inner lining 607, two additional boxes 601 are symmetrically arranged about the transverse central axis of the valve seat body 2, the eccentric wheel 604 and the driving rod 605 fit tightly, the top and bottom of the valve seat body 2 are provided with through grooves 10, the driving rod 605 passes through the through groove 10, the driving rod 605 is elastically connected to the additional box 601 through a reset spring 606, and the outer diameter of the scraper ring 608 matches the inner diameter of the valve seat body 2.

[0023] The specific operation is as follows: the upper and lower sets of forward and reverse motors 602 respectively drive the connected drive shaft 603 and eccentric wheel 604 to rotate counterclockwise and clockwise, and the eccentric wheel 604 pushes the drive rod 605 to squeeze the reset spring 606, so that the drive rod 605 drives the inner lining tube 607 and the scraper ring 608 to move inside the valve seat body 2, thereby scraping off the impurities accumulated on the sealing surface to prevent the impurities from being stuck between the gate plate 5 and the valve seat body 2 when the gate plate 5 falls.

[0024] like Figure 2 As shown, the groove on the inner surface of the valve seat body 2 is connected to a support rod 7 via a rotating shaft, and the other end of the support rod 7 is connected to a brush plate 9 via a rotating shaft. A return spring 2 8 is installed on one side of the support rod 7, and the support rod 7 is elastically connected to the valve seat body 2 via the return spring 2 8.

[0025] The specific operation is as follows: when the filter screen 609 moves with the inner lining tube 607 and the scraper ring 608, the support rod 7 retracts through the reset spring 8 to drive the brush plate 9 to move on the surface of the filter screen 609, thereby removing impurities accumulated in the mesh of the filter screen 609 and ensuring the fluid flow rate in the valve seat body 2.

[0026] In summary, when the integrated knife gate valve seat is used, firstly, the bracket 1, the valve seat body 2, the connecting plate 3 and the additional box 601 are formed by an integrated casting technology, and there is no gap or crack at the interface, which effectively reduces the risk of leakage;

[0027] When it is necessary to clean the impurities on the sealing surface of the valve seat body 2, turn the hand wheel 4 to move the gate plate 5 upward, and then start the two sets of forward and reverse motors 602 to work. The upper and lower sets of forward and reverse motors 602 respectively drive the drive shaft 603 and the eccentric wheel 604 connected thereto to rotate counterclockwise and clockwise, and the eccentric wheel 604 overcomes the elastic force of the return spring 606 to make the drive rod 605 slide in the through groove 10, so that the drive rod 605 drives the inner liner 607, the scraper ring 608, and the filter screen 609 to move inside the valve seat body 2, so that the impurities accumulated on the sealing surface are scraped off by the scraper ring 608, so as to avoid the impurities being stuck between the gate plate 5 and the valve seat body 2 when the gate plate 5 moves downward, and ensure the mutual fit between the two when closed to prevent the fluid from passing;

[0028] When the filter screen 609 is displaced, the support rod 7 is affected by the retraction of the reset spring 28 and rotates about the rotating shaft at the groove on the inner surface of the valve seat body 2, thereby changing the support angle of the brush plate 9, so that the brush plate 9 is longitudinally displaced along the surface of the filter screen 609, and the friction between the two is used to remove impurities blocked in the mesh of the filter screen 609, thereby achieving the purpose of anti-clogging.

[0029] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An integrated knife gate valve seat, comprising a bracket (1), a hand wheel (4) and a scraper assembly (6), characterized in that: A valve seat body (2) is arranged at the bottom of the support (1), and connecting plates (3) are installed at both ends of the valve seat body (2). The hand wheel (4) is arranged at the top of the support (1), and the valve stem at the bottom of the hand wheel (4) passes through the support (1) and is connected to a gate plate (5). The scraper assembly (6) is installed at the bottom of the valve seat body (2), and the scraper assembly (6) includes an additional box (601), a forward and reverse motor (602), a drive shaft (603), an eccentric wheel (604), a drive rod (605), a return spring (606), an inner liner (607) and a scraper ring (608). The additional box ( A forward and reverse motor (602) is installed on the right side of the valve seat body (601), and the output end of the forward and reverse motor (602) passes through the right side of the additional box (601) and is connected to a drive shaft (603), an eccentric wheel (604) is arranged on the outside of the drive shaft (603), and a return spring (606) is connected to the inner surface of the additional box (601), and a drive rod (605) is arranged on the other end of the return spring (606), and an inner lining tube (607) is fixed on one end of the drive rod (605) close to the inner transverse central axis of the valve seat body (2), and a scraper ring (608) is sleeved on the outer side of the inner lining tube (607).

2. The integrated knife gate valve seat according to claim 1, characterized in that: The gate plate (5) passes through the opening at the top of the valve seat body (2), and the bracket (1), the valve seat body (2), the connecting plate (3) and the additional box (601) are in an integrated structure.

3. The integrated knife gate valve seat according to claim 1, characterized in that: The wall scraping assembly (6) further comprises a filter screen (609), and the filter screen (609) is installed inside the inner liner cylinder (607).

4. The integrated knife gate valve seat according to claim 1, characterized in that: Two additional boxes (601) are symmetrically arranged about the transverse center axis of the valve seat body (2), and the eccentric wheel (604) and the driving rod (605) are tightly fitted.

5. The integrated knife gate valve seat according to claim 1, characterized in that: The top and bottom of the valve seat body (2) are both provided with through grooves (10), and the driving rod (605) passes through the through grooves (10).

6. The integrated knife gate valve seat according to claim 1, characterized in that: The driving rod (605) is elastically connected to the additional box (601) via a return spring (606), and the outer diameter of the scraper ring (608) matches the inner diameter of the valve seat body (2).

7. The integrated knife gate valve seat according to claim 1, characterized in that: The groove on the inner surface of the valve seat body (2) is connected to a support rod (7) via a rotating shaft, and the other end of the support rod (7) is connected to a brush plate (9) via a rotating shaft.

8. The integrated knife gate valve seat according to claim 7, characterized in that: A second return spring (8) is installed on one side of the support rod (7), and the support rod (7) is elastically connected to the valve seat body (2) via the second return spring (8).

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