CN220016142U - Ceramic double-flashboard gate valve - Google Patents

Abstract

The utility model discloses a ceramic double-flashboard gate valve, relates to the field of gate valves, and solves the problems of abrasion and difficult opening and closing of sealing surfaces caused by the elastic action of a pressure spring. The sleeve is of an inverted T shape, the bottom end of the valve rod is integrally provided with an inclined plugboard, the inclined plugboard is provided with an plugboard inclined plane, the springs are divided into two sections, two inclined press blocks are arranged between the two sections of springs and are pressed against the inner side ends of the springs respectively corresponding to the two sections of springs, the inclined press blocks are provided with press block inclined planes, and the press block inclined planes are in sliding fit with the plugboard inclined planes so as to retract or push the inclined press blocks in the lifting process of the valve rod. When the inclined flashboard is deeply inserted between the two inclined pressing blocks, the inclined surface of the flashboard pushes the inclined pressing blocks to one side of the spring through the matching of the inclined surface, so that the elastic compensation of the spring to the flashboard is enhanced, and the flashboard and the valve seat are more compact to enhance the tightness; when the inclined flashboard rises along with the valve rod, the inclined pressing block returns back, so that the elastic pressure of the spring to the flashboard is relaxed, the moment required by opening and closing is reduced, and the abrasion generated by the relative movement of the flashboard and the valve seat is reduced.

Description

Ceramic double-flashboard gate valve

Technical Field

The utility model relates to the field of gate valves, in particular to a ceramic double-gate valve.

Background

The gate valve is a sliding valve with a shutter as a closing member, and the shutter is closely matched with a valve seat. The Chinese patent utility model discloses a ceramic sealing double-flashboard gate valve (publication No. CN 2763648Y), and improves the contact surface of a valve plate pressure spring and the valve plate into a spherical surface, so that the flashboard can automatically center by axial force when being closed, the defect that the sealing surface cannot be automatically matched due to the conventional plane contact is overcome, and the sealing effect of the flashboard is further improved. However, in the use process, when the compacting elastic force of the pressure spring is set to be too large, after the sealing surface which is opened and closed for a plurality of times by the gate valve is worn, the tightness between the gate plate and the valve seat is reduced; if the pressing elastic force of the pressure spring is too small, the medium in the valve body in the closed state of the gate valve can leak from the gap between the gate plate and the valve seat, and the sealing performance is reduced. In addition, when the gate valve moves relative to the valve seat, the gate plate generates larger friction force due to too close contact between the compression elasticity of the pressure spring and the valve seat, so that the problem of overlarge opening and closing moment of the gate plate is caused, and therefore, the difficulty of selecting a proper pressure spring is larger.

Disclosure of Invention

The purpose of the utility model is that: in order to overcome the defects of the prior art, the utility model provides a ceramic double-gate valve, which solves the problems of abrasion of a sealing surface and difficult opening and closing caused by the elastic action of a pressure spring.

The technical scheme of the utility model is as follows: including flashboard, disk seat, valve body and valve rod, the sleeve is installed to the bottom of valve rod, telescopic both sides and flashboard spacing connection are provided with the spring of roof pressure on the flashboard in the sleeve, and the sleeve is the type of falling "T", and the bottom of valve rod is integrative to be provided with to one side picture peg, and to one side picture peg has the picture peg inclined plane, and the spring divide into two sections, is provided with two oblique briquetting between two sections springs, and the oblique briquetting roof pressure is on the inboard of the spring that corresponds respectively, and the oblique briquetting has the briquetting inclined plane, and briquetting inclined plane and picture peg inclined plane sliding fit are in order to fall back or impel the oblique briquetting at the lift in-process of valve rod.

By adopting the technical scheme, when the inclined flashboard is deeply inserted between the two inclined pressing blocks, the inclined surface of the flashboard pushes the inclined pressing blocks to one side of the spring through the matching of the inclined surface, so that the elastic compensation of the spring to the flashboard is enhanced, the flashboard and the valve seat are more compact, the tightness is enhanced, and the leakage is reduced; when the inclined flashboard rises along with the valve rod, the inclined pressing block returns back, so that the elastic pressure of the spring to the flashboard is relaxed, the close fit of the flashboard to the valve seat is reduced, the friction force of the sealing surface is reduced, the moment required by opening and closing is reduced, and the abrasion generated by the relative movement of the flashboard and the valve seat is reduced.

In one possible design, the top of the sleeve comprises a limiting cavity, a ring rib is fixedly arranged above the inclined inserting plate, the valve rod penetrates through the limiting cavity and the inclined inserting plate penetrates from the limiting cavity until being matched with the inclined pressing block, and the ring rib slides in the limiting cavity and abuts against the top wall and the bottom wall of the limiting cavity when the travel is limited.

By adopting the design, the sliding travel of the annular rib in the limiting cavity is the travel of the inclined plugboard and the inclined pressing block, after the annular rib reaches the limit of the ascending travel, the valve rod drives the sleeve and the flashboard to ascend, the valve rod is separated from the flashboard to leave the valve seat, the valve is opened, the inclined pressing block is retracted or pushed by the opening and closing action of the valve rod, and the valve is reasonable and effective in design and flexible to open and close.

In one possible design, a plurality of pressure relief holes are arranged on the side wall of the limiting cavity, and the pressure relief holes are close to the top wall and the bottom wall of the limiting cavity.

By adopting the design, the pressure relief hole is used for relieving the pressure in the limiting cavity, so that the annular rib can be lifted more smoothly.

In one possible design, the outer end of the spring is provided with a spherical body, the outer end of the spring is propped against the spherical body, and the spherical body is provided with a front spherical surface which is contacted with the flashboard; the rear of the spherical body is extended with a hollow cylinder column, the cylinder column is positioned in the spring, the inclined pressing block is integrally provided with a center column, and the center column movably penetrates through the cylinder column.

By adopting the design, when the inclined pressing block is pressed, the central column is pushed in the cylinder column, so that the functions of limiting the inclined pressing block and the spring are achieved.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of the utility model at A in FIG. 1;

FIG. 3 is a schematic illustration of the fully closed state of FIG. 2 in accordance with the present utility model;

wherein, 1, flashboard; 2. a valve seat; 3. a valve body; 4. a valve stem; 5. a sleeve; 6. a spring; 41. an inclined plugboard; 411. an inserting plate inclined plane; 51. a diagonal briquetting; 511. briquetting inclined planes; 52. a spacing cavity; 42. a ring rib; 521. a pressure relief hole; 53. a spherical body; 531. a front spherical surface; 532. a cylinder column; 54. and a center column.

Description of the embodiments

The ceramic double-gate valve shown in fig. 1-3 comprises a gate plate 1, a valve seat 2, a valve body 3 and a valve rod 4, wherein a sleeve 5 is installed at the bottom end of the valve rod 4, two sides of the sleeve 5 are in limiting connection with the gate plate 1, a spring 6 propped against the gate plate 1 is arranged in the sleeve 5, the sleeve 5 is inverted T-shaped, a platy inclined plug plate 41 is integrally arranged at the bottom end of the valve rod 4, the inclined plug plate 41 is provided with a plug plate inclined surface 411, the thickness of the bottom end of the inclined plug plate 41 gradually decreases upwards along the central axis of the valve rod 4, and the inclined plug plate 41 forms a sharp angle shape. The springs 6 are divided into left and right sections, two inclined pressing blocks 51 are arranged between the two sections of springs 6, the inclined pressing blocks 51 are pressed against the inner side ends of the springs 6, the inclined pressing blocks 51 are provided with pressing block inclined planes 511, and the pressing block inclined planes 511 are in sliding fit with the inserting plate inclined planes 411. In the process of closing the valve by descending the valve rod 4, the inclined plugboard 41 is deeply inserted between the two inclined pressing blocks 51, the plugboard inclined surface 411 is in staggered fit with the corresponding pressing block inclined surface 511, the inclined pressing blocks 51 are pushed to one side of the spring 6 along with descending of the inclined plugboard 41, the spring 6 is compressed under force and is applied to the flashboard 1, so that the flashboard 1 is in closer contact with the valve seat 2, the tightness is enhanced, and leakage is reduced; in the process of opening the valve by lifting the valve rod 4, the inclined plugboard 41 is lifted along with the valve rod 4 to drive the two inclined pressing blocks 51 to approach each other until reset, the spring 6 stretches to relieve the elastic pressure on the flashboard 1, the close fit of the flashboard 1 to the valve seat 2 is reduced, and the abrasion generated by the relative movement of the flashboard 1 and the valve seat 2 when the valve is opened is relieved.

The top of the inverted T-shaped sleeve 5 comprises a limiting cavity 52, a ring rib 42 is fixedly arranged above the inclined inserting plate 41, the cavity wall of the limiting cavity 52 surrounds the ring rib 42, the valve rod 4 penetrates through the limiting cavity 52 and the inclined inserting plate 41 penetrates from the limiting cavity 52 until being matched with the inclined pressing block 51, and the ring rib 42 slides in the limiting cavity 52 and abuts against the top wall and the bottom wall of the limiting cavity 52 to be limited when the travel is limited. When the valve rod 4 descends and the flashboard 1 reaches the closing position, the annular convex edge 42 slides and descends in the limiting cavity 52 until the valve abuts against the bottom wall of the limiting cavity 52 in the limiting cavity 52, and the valve is completely closed; when the valve rod 4 ascends to pre-open the valve, the annular convex edge 42 firstly ascends in the limiting cavity 52 until the annular convex edge 42 abuts against the top wall of the limiting cavity 52, and the flashboard 1 ascends to open the valve.

In order not to affect the normal sliding motion of the annular rib 42 in the limiting cavity 52, a plurality of pressure relief holes 521 are arranged on the side wall of the limiting cavity 52, and the pressure relief holes 521 are close to the top wall and the bottom wall of the limiting cavity 52, so that the pressure in the limiting cavity 52 is relieved through the pressure relief holes 521.

The outer end of the spring 6 is provided with a spherical body 53, the outer end of the spring 6 is propped against the spherical body 53, the spherical body 53 is provided with a front spherical surface 531 which is contacted with the flashboard 1, and the front spherical surface 531 is contacted with the flashboard 1 so that the flashboard 1 can be automatically aligned by axial force when being closed. A hollow cylinder 532 is integrally extended at the rear of the spherical body 53, the cylinder 532 is positioned in the spring 6, a central column 54 is integrally arranged on the inclined pressing block 51, and the central column 54 movably penetrates through the cylinder 532. When the diagonal press block 51 is pressed, the central column 54 is pushed into the cylindrical column 532, and the cooperation of the central column 54 and the cylindrical column 532 is used for guiding the sliding of the diagonal press block 51 and plays a role of the spring 6.

Claims (4)

1. The utility model provides a ceramic double-flashboard gate valve, includes flashboard, disk seat, valve body and valve rod, the sleeve is installed to the bottom of valve rod, telescopic both sides and flashboard spacing connection, be provided with the spring of roof pressure on the flashboard in the sleeve, its characterized in that: the sleeve is of an inverted T shape, an inclined inserting plate is integrally arranged at the bottom end of the valve rod and provided with an inserting plate inclined plane, the springs are divided into two sections, two inclined pressing blocks are arranged between the two sections of springs and are pressed against the inner side ends of the springs respectively, the inclined pressing blocks are provided with pressing block inclined planes, and the pressing block inclined planes are in sliding fit with the inserting plate inclined planes so as to retract or push the inclined pressing blocks in the lifting process of the valve rod.

2. The ceramic double gate valve of claim 1, wherein: the top of the sleeve comprises a limiting cavity, a ring rib is fixedly arranged above the inclined inserting plate, the valve rod penetrates through the limiting cavity and penetrates into the inclined inserting plate from the limiting cavity until being matched with the inclined pressing block, and the ring rib slides in the limiting cavity and abuts against the top wall and the bottom wall of the limiting cavity when the travel is limited.

3. The ceramic double gate valve of claim 2, wherein: the side wall of the limiting cavity is provided with a plurality of pressure relief holes, and the pressure relief holes are close to the top wall and the bottom wall of the limiting cavity.

4. A ceramic double gate valve according to claim 1 or 3, characterized in that: the outer end of the spring is provided with a spherical body, the outer end of the spring is propped against the spherical body, and the spherical body is provided with a front spherical surface which is contacted with the flashboard; the rear of the spherical body is extended with a hollow cylinder column, the cylinder column is positioned in the spring, the inclined pressing block is integrally provided with a center column, and the center column movably penetrates through the cylinder column.