CN219588132U - Fluorine-lined stop valve - Google Patents

Abstract

The utility model relates to the technical field of valves, in particular to a fluorine-lined stop valve, which comprises a valve body, a valve clack, a valve rod and a valve cover, wherein lining layers are arranged on the valve body, the valve clack, the valve rod and the valve cover, the upper end of the valve clack is in threaded connection with the valve rod, the lower end of the valve clack is provided with a buffer part matched with a valve seat, an elastic piece is arranged between the buffer part and the valve clack, one end of the buffer part is provided with a fixed part, the other end of the buffer part is provided with a movable part, the lower end of the valve clack is provided with a first groove and a second groove which are correspondingly matched with the fixed part and the movable part, the fixed part is in plug-in fit with the first groove and reciprocates in the first groove along the axial direction of the valve rod, the movable part comprises a fixed block connected through a connecting piece, the fixed block is plug-in fit with the second groove and reciprocates in the second groove along the axial direction of the valve rod, the lining layers on the valve clack extend to the outer wall of the buffer part, and the buffer part with the elastic piece is arranged below the valve clack when the valve is closed, so that the buffer part with the elastic piece is used for buffering, and the loss caused by the impact of a medium or the valve seat.

Description

Fluorine-lined stop valve

Technical Field

The utility model relates to the technical field of valves, in particular to a fluorine-lined stop valve.

Background

The shut-off valve is a positive-locking valve, so that when the valve is closed, pressure must be applied to the flap to force the sealing surface against leakage. When a medium enters the valve from the lower part of the valve clack, the resistance which needs to be overcome by the operation force is the friction force of the valve rod and the filler and the thrust generated by the pressure of the medium, and the force for closing the valve is larger than the force for opening the valve, so that the diameter of the valve rod is larger, otherwise, the valve rod is in a bending fault. After the self-sealing valve appears, the medium flow direction of the stop valve is changed from the upper part of the valve clack to the valve cavity, at this time, under the action of medium pressure, the force for closing the valve is small, the force for opening the valve is large, and the diameter of the valve rod can be correspondingly reduced. At the same time, under the action of the medium, the valve in the form is also tighter. The flow direction of the stop valve is generally from top to bottom.

When the stop valve is opened, the opening height of the valve clack is 25-30% of the nominal diameter, and the flow rate reaches the maximum, which indicates that the valve has reached the full-open position. The fully open position of the shut-off valve is determined by the stroke of the valve flap.

Patent CN212251148U discloses a lining fluorine stop valve, including valve body, valve clack, valve rod and valve gap, the valve body passes through bolt fixed connection with the valve gap, be equipped with the medium passageway in the valve body, the valve clack is established in the valve body, the upper end and the valve rod fixed connection of valve clack, the valve rod protrusion sets up in the valve gap, one side edge that the valve rod was kept away from to the valve clack is established to the chamfer, be equipped with the spread groove corresponding with the valve clack in the valve body, the spread groove includes tilting portion and vertical portion, the tilting portion is established in the below of vertical portion, tilting portion corresponds the setting with the chamfer on the valve clack, vertical portion sets up, all be equipped with lining layer on valve body, valve clack, valve rod and the valve gap, the inventor further discovers that this structure has following problem: the fluorine-lined stop valve with the structure has the defects of large valve clack loss and high replacement cost after the valve clack loss.

Disclosure of Invention

The utility model aims to overcome the defects and shortcomings in the prior art and provides a fluorine-lined stop valve.

The technical scheme adopted by the utility model is as follows: the utility model provides a lining fluorine stop valve, includes valve body, valve clack, valve rod and valve gap, the valve body passes through bolt fixed connection with the valve gap, be equipped with the medium passageway in the valve body, the valve rod protrusion is in the valve gap setting, be equipped with the disk seat corresponding with the valve clack in the valve body, the disk seat separates the medium passageway, and the disk seat top is the inflow channel, and the disk seat below is the outflow passageway, all be equipped with the lining layer on valve body, valve clack, valve rod and the valve gap, the upper end and the valve rod threaded connection of valve clack, the valve clack lower extreme is equipped with the buffer with disk seat complex, be equipped with the elastic component between buffer and the valve clack, buffer one end is equipped with fixed part and the other end is equipped with movable part, the valve clack lower extreme is equipped with first recess and the second recess of corresponding complex with fixed part and movable part, fixed part and first recess grafting cooperation and follow valve rod axial direction and carry out reciprocating motion in the first recess, the fixed block is pegged graft and is followed the fixed block that the second recess is connected, the valve rod is pegged graft and is followed axial direction and is carried out reciprocating motion in the second recess, the upper wall of valve clack extends to the buffer.

Preferably, the buffer part and the valve seat are propped against to form a first sealing surface, the valve clack is provided with a propping part, the propping part and the valve seat are propped against to form a second sealing surface, the width of the first sealing surface is smaller than that of the second sealing surface, the first sealing surface is close to the outflow channel, and the second sealing surface is close to the inflow channel.

Preferably, the buffer part is provided with a chamfer at the position propped against the valve seat, the valve seat is provided with an inclined part matched with the chamfer, and the position propped against the valve seat is provided with an arc-shaped lug at the position propped against the abutting part.

Preferably, the inflow channel and the outflow channel are both connected with flanges, the lining layer extends to the outer sides of the flanges, trapezoidal protruding blocks are arranged at the positions, matched with the flanges, of the lining layer, and trapezoidal grooves matched with the trapezoidal protruding blocks are formed in the flanges.

Preferably, the lining layer extends to between the valve body and the valve cover, trapezoidal protruding blocks are arranged at the matching positions of the lining layer, the valve cover and the valve body, and trapezoidal grooves matched with the trapezoidal protruding blocks are arranged on the valve cover and the valve body.

Preferably, the valve rod bulge valve gap part is equipped with gland, valve rod nut and hand wheel in proper order, the butt has packing layer and packing jacket between gland and the valve gap, the hand wheel passes through bolt spare and valve rod fixed connection, valve rod nut and valve rod threaded connection, the valve gap upwards extends there is extension, valve rod nut and extension fixed connection, the valve rod drives the valve clack through rotating the hand wheel and follows axial direction reciprocating motion.

Preferably, a connecting block is arranged between the valve rod nut and the packing gland, and the connecting block is fixedly connected with the valve rod.

Preferably, an annular sealing ring is arranged between the packing layer and the valve rod.

Preferably, the valve cover is hinged with a loose joint bolt, and the packing gland is fixedly connected with the valve cover through the cooperation of the loose joint bolt and a nut.

Preferably, reinforcing ribs are arranged between the outer wall of the valve body and the outer walls of the inflow channel and the outflow channel.

The beneficial effects of the utility model are as follows: the valve is buffering through the buffer part that has the elastic component of valve clack below when closed, reduces the loss that the impact of medium or disk seat to the valve clack caused, and buffer part is detachable structure and conveniently changes, and general valve rod and valve clack are integrated into one piece, and detachable structure does not need to change whole valve rod, has significantly reduced cost of maintenance.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is a schematic diagram of a fluorine lined shutoff valve of the present utility model;

fig. 2 is an enlarged view of a portion a in fig. 1;

fig. 3 is an enlarged view of a portion B in fig. 1;

fig. 4 is an enlarged view of a portion C in fig. 1;

in the figure, 1-valve body, 2-valve clack, 3-valve stem, 4-valve cover, 5-valve seat, 6-inflow channel, 7-outflow channel, 8-lining layer, 9-buffer part, 10-elastic piece, 11-fixed part, 12-movable part, 13-first groove, 14-second groove, 15-fixed block, 16-first sealing surface, 17-abutting part, 18-second sealing surface, 19-chamfer, 20-inclined part, 21-arc-shaped bump, 22-flange, 23-trapezoid bump, 24-packing gland, 25-valve stem nut, 26-hand wheel, 27-packing layer, 28-packing press sleeve, 29-extension part, 30-connecting block, 31-annular sealing ring, 32-loose joint bolt, 33-reinforcing rib.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.

It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.

The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.

As shown in fig. 1 to 4, an embodiment of the present utility model is a fluorine-lined stop valve, which comprises a valve body 1, a valve clack 2, a valve rod 3 and a valve cover 4, wherein the valve body 1 and the valve cover 4 are fixedly connected through bolts, a medium channel is arranged in the valve body 1, the valve clack 2 is arranged in the valve body 1, the valve rod 3 protrudes out of the valve cover 4, a valve seat 5 corresponding to the valve clack 2 is arranged in the valve body 1, the valve seat 5 separates the medium channel, an inflow channel 6 is arranged above the valve seat 5, an outflow channel 7 is arranged below the valve seat 5, lining layers 8 are arranged on the valve body 1, the valve clack 2, the valve rod 3 and the valve cover 4, the upper end of the valve clack 2 is in threaded connection with the valve rod 3, a buffer part 9 matched with the valve seat 5 is arranged at the lower end of the valve clack 2, the valve comprises a valve body and is characterized in that an elastic piece 10 is arranged between a buffer part 9 and the valve clack 2, a fixed part 11 is arranged at one end of the buffer part 9, a movable part 12 is arranged at the other end of the buffer part, a first groove 13 and a second groove 14 which are correspondingly matched with the fixed part 11 and the movable part 12 are arranged at the lower end of the valve clack 2, the fixed part 11 is in plug-in fit with the first groove 13 and reciprocates in the first groove 13 along the axial direction of the valve rod 3, the movable part 12 comprises a fixed block 15 connected through a connecting piece, the fixed block 15 is in plug-in fit with the second groove 14 and reciprocates in the second groove 14 along the axial direction of the valve rod 3, and a lining layer 8 on the valve clack 2 extends to the outer wall of the buffer part 9. The valve is cushioned through the buffer part that has the elastic component of valve clack below when closed, reduces the loss that the impact of medium or disk seat to the valve clack caused, and buffer part is fixed between valve clack and disk seat when the valve rod removes certain position, forms sealedly, and is sealed reliable, and buffer part is detachable structure and conveniently changes, and general valve rod and valve clack are integrated into one piece, and detachable structure need not change whole valve rod, has significantly reduced cost of maintenance. The lining layer is made of a fluorine lining material, and has better corrosion resistance and sealing performance, so that the service life of the stop valve is further prolonged, and the sealing performance of the stop valve is further improved.

Further, the buffer portion 9 abuts against the valve seat 5 to form a first sealing surface 16, the valve clack 2 is provided with an abutting portion 17, the abutting portion 17 abuts against the valve seat 5 to form a second sealing surface 18, the width of the first sealing surface 16 is smaller than that of the second sealing surface 18, the first sealing surface 16 is close to the outflow channel 7, and the second sealing surface 18 is close to the inflow channel 6. Because the flow direction of the stop valve from top to bottom opens the second sealing surface when the valve rod moves upwards, part of medium enters between the first sealing surface and the second sealing surface, and then the valve rod moves upwards to drive the valve clack to open the first sealing surface, the two corresponding sealing surfaces formed by the two layers of valve clacks and the valve seat are utilized to cut off the flow passage so as to block the fluid, the sealing pair can effectively avoid the scouring of high-speed fluid in the opening and closing process, and the double sealing structure ensures that the valve is labor-saving to open and close, reliable in sealing and long in service life.

Further, a chamfer 19 is provided on the buffer portion 9 in contact with the valve seat 5, an inclined portion 20 matching with the chamfer 19 is provided on the valve seat 5, and an arc-shaped bump 21 is provided on the contact portion 17 in contact with the valve seat 5. The first sealing surface is an inclined surface, the inclined surface enables the valve clack to have a certain guiding effect and be more compact when in sealing engagement, and the second sealing surface is an arc-shaped surface, so that elastic sealing is formed, and the sealing performance is improved.

Further, the inflow channel 6 and the outflow channel 7 are both connected with a flange 22, the lining layer 8 extends to the outer side of the flange 22, a trapezoid protruding block 23 is arranged at the matching position of the lining layer 8 and the flange 22, and a trapezoid groove matched with the trapezoid protruding block 23 is arranged on the flange 22. Through the cooperation of trapezoidal lug and trapezoidal recess, with lining layer edge more firm fixed on the flange, prevent that the lining layer from droing.

Further, the lining layer 8 extends between the valve body 1 and the valve cover 4, trapezoidal protruding blocks 23 are arranged at the matching positions of the lining layer 8, the valve cover 4 and the valve body 1, and trapezoidal grooves matched with the trapezoidal protruding blocks 23 are formed in the valve cover 4 and the valve body 1. The lining layer is extended between the valve body and the valve cover, and the valve cover is also provided with a matching structure of the trapezoid protruding blocks and the trapezoid grooves, so that the firmness of fixing the lining layer on the inner wall of the valve is further improved.

Further, a packing gland 24, a valve rod nut 25 and a hand wheel 26 are sequentially arranged on the part, protruding out of the valve cover 4, of the valve rod 3, a packing layer 27 and a packing sleeve 28 are abutted between the packing gland 24 and the valve cover 4, the hand wheel 26 is fixedly connected with the valve rod 3 through a bolt piece, the valve rod nut 25 is in threaded connection with the valve rod 3, an extension portion 29 extends upwards from the valve cover 4, the valve rod nut 25 is fixedly connected with the extension portion 29, and the valve rod 3 drives the valve clack 2 to reciprocate along the axial direction through rotating the hand wheel 26. The valve rod is rotated by rotating the hand wheel, the valve rod nut is fixedly connected with the valve cover through the extension part, the valve rod is in threaded fit with the valve rod nut, the valve rod rotates to move relatively relative to the valve cover, and the packing layer increases the tightness between the valve rod and the valve cover.

Further, a connection block 30 is arranged between the valve rod nut 25 and the packing gland 24, and the connection block 30 is fixedly connected with the valve rod 3. The connecting block is arranged between the valve rod nut and the packing gland, the connecting block can enable the valve rod to have a stroke of relative movement through being fixedly connected with the valve rod, the connecting block and the valve rod synchronously move, the movement of the valve rod is limited, and the blocking caused by excessive rotation is prevented.

Further, an annular sealing ring 31 is arranged between the packing layer 27 and the valve rod 3. The tightness between the packing layer and the valve rod is further improved through the annular sealing ring.

Further, the valve cover 4 is hinged with a loose joint bolt 32, and the packing gland 24 is fixedly connected with the valve cover 4 through the cooperation of the loose joint bolt 32 and a nut. The gland can be removed by unscrewing the nut and rotating the loose joint bolt to separate from the groove of the gland, otherwise the gland is fixed, the loose joint bolt is hinged with the valve cover, and the part can be removed without separating from the valve, so that the quick-dismantling valve has the advantages of quick disassembly and part loss prevention.

Further, reinforcing ribs 33 are arranged between the outer wall of the valve body 1 and the outer walls of the inflow channel 6 and the outflow channel 7. The structural strength of the valve body pipeline is greatly increased by the reinforcing ribs.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims (10)

1. The utility model provides a lining fluorine stop valve, includes valve body (1), valve clack (2), valve rod (3) and valve gap (4), valve body (1) and valve gap (4) pass through bolt fixed connection, be equipped with the medium passageway in valve body (1), valve clack (2) are established in valve body (1), valve rod (3) protrusion set up in valve gap (4), be equipped with disk seat (5) corresponding with valve clack (2) in valve body (1), disk seat (5) separate the medium passageway, disk seat (5) top is inflow passageway (6), and disk seat (5) below is outflow passageway (7), all be equipped with lining layer (8) on valve body (1), valve clack (2), valve rod (3) and valve gap (4), its characterized in that: the valve clack (2) upper end and valve rod (3) threaded connection, valve clack (2) lower extreme is equipped with disk seat (5) complex buffer (9), be equipped with elastic component (10) between buffer (9) and valve clack (2), buffer (9) one end is equipped with fixed part (11) and the other end is equipped with movable part (12), valve clack (2) lower extreme is equipped with first recess (13) and second recess (14) with fixed part (11) and movable part (12) correspondence complex, fixed part (11) are pegged graft the cooperation with first recess (13) and follow valve rod (3) axial direction and carry out reciprocating motion in first recess (13), movable part (12) are including fixed block (15) through the connecting piece connection, fixed block (15) are pegged graft the cooperation with second recess (14) and are carried out reciprocating motion in second recess (14) along valve rod (3) axial direction, lining layer (8) on valve clack (2) extend to buffer (9) outer wall.

2. A fluorine lined shutoff valve as claimed in claim 1, wherein: the buffer part (9) and the valve seat (5) are propped against to form a first sealing surface (16), the valve clack (2) is provided with a propping part (17), the propping part (17) and the valve seat (5) are propped against to form a second sealing surface (18), the width of the first sealing surface (16) is smaller than that of the second sealing surface (18), the first sealing surface (16) is close to the outflow channel (7), and the second sealing surface (18) is close to the inflow channel (6).

3. A fluorine lined shutoff valve as claimed in claim 2, wherein: the buffer part (9) is provided with a chamfer (19) at the position propped against the valve seat (5), the valve seat (5) is provided with an inclined part (20) matched with the chamfer (19), and the position propped against the valve seat (5) is provided with an arc-shaped protruding block (21) at the position propped against the abutting part (17).

4. A fluorine lined shutoff valve as claimed in claim 1, wherein: the inflow channel (6) and the outflow channel (7) are both connected with a flange (22), the lining layer (8) extends to the outer side of the flange (22), a trapezoid protruding block (23) is arranged at the matching position of the lining layer (8) and the flange (22), and a trapezoid groove matched with the trapezoid protruding block (23) is formed in the flange (22).

5. A fluorine lined shutoff valve as claimed in claim 4, wherein: the lining layer (8) extends to a position between the valve body (1) and the valve cover (4), trapezoidal protruding blocks (23) are arranged at the matching positions of the lining layer (8) and the valve cover (4) and the valve body (1), and trapezoidal grooves matched with the trapezoidal protruding blocks (23) are formed in the valve cover (4) and the valve body (1).

6. A fluorine lined shutoff valve as claimed in claim 1, wherein: valve rod (3) protrusion valve gap (4) part is equipped with gland (24), valve rod nut (25) and hand wheel (26) in proper order, butt has packing layer (27) and packing cover (28) between gland (24) and valve gap (4), hand wheel (26) pass through bolt spare and valve rod (3) fixed connection, valve rod nut (25) and valve rod (3) threaded connection, valve gap (4) upward extension has extension (29), valve rod nut (25) and extension (29) fixed connection, valve rod (3) drive valve clack (2) along axial direction reciprocating motion through rotating hand wheel (26).

7. A fluorine lined shutoff valve as claimed in claim 6, wherein: a connecting block (30) is arranged between the valve rod nut (25) and the packing gland (24), and the connecting block (30) is fixedly connected with the valve rod (3).

8. A fluorine lined shutoff valve as claimed in claim 6, wherein: an annular sealing ring (31) is arranged between the packing layer (27) and the valve rod (3).

9. A fluorine lined shutoff valve as claimed in claim 6, wherein: the valve cover (4) is hinged with a loose joint bolt (32), and the packing gland (24) is fixedly connected with the valve cover (4) through the cooperation of the loose joint bolt (32) and a nut.

10. A fluorine lined shutoff valve as claimed in claim 1, wherein: reinforcing ribs (33) are arranged between the outer wall of the valve body (1) and the outer walls of the inflow channel (6) and the outflow channel (7).