阅读说明：本技术 一种耐磨性好的球阀加工工艺 (Ball valve machining process with good wear resistance ) 是由 张志荣 于 2018-10-10 设计创作，主要内容包括：本发明公开了一种耐磨性好的球阀加工工艺,包括具有介质流道的阀芯和与所述阀芯外壁相配合的阀座,所述阀芯表面设有第一耐磨层；本发明设置第一耐磨层,该第一耐磨层的表面可以设置为光滑,第一耐磨层与阀座之间的摩擦力可以得到减小,从而阀芯在转动的时候更为快速；而且第一耐磨层可保障在不断地转动情况下阀芯与阀座之间仍会保持紧密贴合的效果,不会出现间隙,避免了管道内的流体的发生泄漏,避免流体浪费,同样的提高管道的安全性。(The invention discloses a ball valve processing technology with good wear resistance, which comprises a valve core with a medium flow passage and a valve seat matched with the outer wall of the valve core, wherein the surface of the valve core is provided with a first wear-resistant layer; the valve core is provided with the first wear-resistant layer, the surface of the first wear-resistant layer can be smooth, and the friction force between the first wear-resistant layer and the valve seat can be reduced, so that the valve core can rotate more quickly; and the first wear-resisting layer can ensure that the valve core and the valve seat can still keep the effect of tight fit under the condition of continuous rotation, no gap can be generated, the leakage of fluid in the pipeline is avoided, the waste of the fluid is avoided, and the safety of the pipeline is improved as well.)

1. The ball valve machining process with good wear resistance comprises a valve core (2) with a medium flow channel (20) and a valve seat (3) matched with the outer wall of the valve core (2), and is characterized in that: a first wear-resistant layer (29) is arranged on the surface of the valve core (2);

the machining process of the ball valve comprises the following steps:

1) performing anastomosis treatment, namely placing the valve core and the valve seat on grinding equipment to rub with each other to a preset specification;

2) and (3) adhesion treatment: immersing the grinded valve core in a first suspension liquid dispersed with first diamond particles to attach the first diamond particles, and immersing the valve seat in a second suspension liquid dispersed with second diamond particles to attach the second diamond particles;

3) irradiating laser by using a laser to scan the surfaces of the valve core and the valve seat so as to fuse the surface layers of the valve seat and the valve core;

4) placing the valve core and the valve seat in hydrochloric acid with the concentration of 0.010-0.080mol/L to clean for 6-15 min;

5) the surface of the valve core is attached with the first wear-resistant layer, and the surface of the valve seat is attached with the second wear-resistant layer;

the grinding device comprises

A frame (1);

a first fixing member (4) inserted into the medium flow path (20);

the first driving part (5) drives the first fixing part (4) to rotate clockwise;

the clamping structure (6) is arranged on the first fixing piece (4), and the clamping structure (6) is firmly abutted against the inner wall of the medium flow channel (20) to fix the valve core (2);

a second fixing member (7);

the clamping structure (9) is arranged on the second fixing part (7) and is used for clamping the valve seat (3) so as to enable the valve seat (3) to be in contact with the valve core (2); the second driving part (8) is used for driving the second fixing part (7) to rotate so as to drive the valve seat (3) and the valve core (2) to rub against each other; a second wear-resistant layer (39) is arranged on the surface of the valve seat (3); a plurality of first diamond particles (28) are thermally fused on the surface of the valve core (2), and the first wear-resistant layer (29) is partially attached to the first diamond particles (28); a plurality of second diamond particles (38) are thermally fused on the surface of the valve seat (3), and the second wear-resistant layer (39) is partially attached to the second diamond particles (38); the first wear-resistant layer and the second wear-resistant layer are both diamond coatings; the grain diameters of the first diamond grains and the second diamond grains are both 0.8-3 mu m; the number of the first diamond particles contained in each 1ml of the first suspension is 30-45 particles, and the number of the second diamond particles contained in each 1ml of the second suspension is 30-45 particles; the parameters of the laser are set as follows: the power is 500-1500w, the laser frequency is 65-150KHz, the pulse width is 67-310ns, and the scanning speed is 5000 mm/s.

Technical Field

The invention belongs to the technical field of valve pipelines, and particularly relates to a ball valve machining process with good wear resistance.

Background

The ball valve is widely applied to multiple industries such as petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmacy, water conservancy, electric power and the like, is widely applied to the market, comprises a valve body, a valve core with a medium flow channel, a valve seat, a valve rod and other parts, and rotates the valve core through the valve rod so as to realize the opening and closing of the ball valve.

The ball valve is mainly applied to a main line of the long-distance pipeline and a process pipeline flow of a gas transmission process station, natural gas is blocked and shunted, the ball valve needs to rotate for many times in the process, so that a medium flow passage and a valve seat are continuously communicated and closed, metal abrasion is generated between the valve core and the valve seat in the continuous rotating process of the valve core due to close contact between the valve core and the valve seat, the valve core and the valve seat are not tightly matched when the ball valve is closed due to the abrasion, and natural gas leakage is caused due to a gap between the valve core and the valve seat.

Consequently need the ball valve at the in-process that uses and just need carry out regular maintenance and change after using a period, but because the ball valve lies in that long defeated pipeline links to each other, its connection is sealing connection, and long defeated pipeline passes through the work piece and fixes, consequently when overhauing the ball valve and changing, need dismantle long defeated pipeline earlier, then just can dismantle the change to the ball valve, it is loaded down with trivial details to overhaul the in-process, consume a large amount of manpower and materials, cause the cost-up of whole long defeated pipeline.

Disclosure of Invention

The invention provides a ball valve processing technology with good wear resistance in order to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme that the ball valve comprises a valve core with a medium flow passage and a valve seat matched with the outer wall of the valve core, and a first wear-resistant layer is arranged on the surface of the valve core. The valve core is provided with the first wear-resistant layer, the first wear-resistant layer is contacted with the valve seat in the using process, so that the direct contact between the valve core and the valve seat is avoided, the metal abrasion between the valve core and the valve seat is also avoided, the wear resistance between the valve seat and the valve core is effectively prolonged, the frequency of overhauling and replacing the valve body and the valve core is greatly reduced, a large amount of manpower and material resources are saved, the cost required by replacing the ball valve is reduced, the economy is improved, the surface of the first wear-resistant layer can be smooth due to the arrangement of the first wear-resistant layer, the friction force between the first wear-resistant layer and the valve seat can be reduced, the valve core can rotate more quickly, the first wear-resistant layer can ensure that the valve core and the valve seat can still keep the tight fit effect under the condition of continuous rotation, no gap is formed, and the leakage of fluid in a pipeline is avoided, the waste of fluid is avoided, and the safety of the pipeline is improved.

The valve seat is provided with a first wear-resistant layer, the first wear-resistant layer is arranged on the valve seat, the valve seat is isolated from direct contact with the valve core, metal is not directly contacted between the valve seat and the valve core in the transition layer, the service life of the valve core and the valve seat is prolonged, the first wear-resistant layer is arranged on the valve seat, air can be isolated from the surface of the valve seat, the corrosion prevention effect is achieved, the valve seat is prevented from being corroded in the long-time use condition, the first wear-resistant layer can ensure that the valve core and the valve seat are kept in close contact in the continuous opening and closing process, gaps cannot be formed between the valve core and the valve seat, leakage of fluid in a pipeline is avoided, and the safety of the pipeline is improved.

Further, a plurality of first diamond particles are thermally melted on the surface of the valve core, and the first wear-resistant layer is partially attached to the first diamond particles; first diamond particle is embedded into the case surface, makes case surface carbon concentration increase in this process, and consequently first wearing layer is when attaching to the case surface, and the nucleation density between first wearing layer and the case improves, and the first wearing layer steadiness on attaching to the case is improved, avoids droing of first wearing layer.

The second diamond particles are embedded into the surface of the valve seat, so that the carbon concentration of the surface of the valve seat is increased in the process, the nucleation density between the second wear-resistant layer and the valve seat is increased when the second wear-resistant layer is attached to the surface of the valve seat, the stability of the second wear-resistant layer attached to the valve seat is improved, and the second wear-resistant layer is prevented from falling off.

Further, the first wear-resistant layer and the second wear-resistant layer are both diamond coatings; the diamond coating has the advantages of high strength and good wear resistance, so the service life between the valve core and the valve seat can be ensured, and the surface of the diamond coating is smooth, particularly, the smoothness of the surface of the diamond coating can be continuously improved along with the rise of temperature in the friction process, so the heat generated in the high-frequency opening and closing process of the valve core and the valve seat can be well utilized, the roughness of the surface of the diamond can be effectively reduced, the friction coefficient between the diamond coatings is further reduced, the resistance of the valve core in the process of rotating relative to the valve seat is small, the generated heat is small, the power required by a motor for rotating the valve core is reduced, and the cost is reduced.

Further, the particle sizes of the first diamond particles and the second diamond particles are both 0.8-3 μm; when the first diamond particles with the particle size are embedded into the valve core, the first diamond particles can be rapidly embedded into the surface of the valve core during laser irradiation, so that a large number of first diamond particles can be arranged on the surface of the valve core, the first diamond particles with the particle size cannot influence the surface of the valve core, and the surface of the valve core is still guaranteed to be smooth macroscopically; similarly, the second diamond particle of this particle size can be fast imbed the surface of disk seat when laser irradiation for the disk seat surface has a large amount of second diamond particles, improves the anticreep nature of second wearing layer when adhering to the disk seat surface, and this particle size is less moreover, and the smoothness on disk seat surface can not influenced by the second diamond particle, when having ensured to cooperate between case and the disk seat, the leakproofness is good.

The invention also discloses a processing technology of the ball valve, which is characterized by comprising the following steps:

1) performing anastomosis treatment, namely placing the valve core and the valve seat on grinding equipment to rub with each other to a preset specification;

2) immersing the grinded valve core in a first suspension liquid dispersed with first diamond particles to attach the first diamond particles, and immersing the valve seat in a second suspension liquid dispersed with second diamond particles to attach the second diamond particles;

3) irradiating laser by using a laser to scan the surfaces of the valve core and the valve seat so as to fuse the surface layers of the valve seat and the valve core;

4) placing the valve core and the valve seat in hydrochloric acid with the concentration of 0.010-0.080mol/L to clean for 6-15 min;

5) the first wear-resistant layer is attached to the surface of the valve core, and the second wear-resistant layer is attached to the surface of the valve seat.

Through the processing of coincideing case and disk seat, mutual wearing and tearing between its case and the disk seat, make the degree of cooperation height between fashioned case and the disk seat, can not have obvious clearance between case and the disk seat, when installing on the valve body, case and disk seat in close contact with, consequently can effectual improvement ball valve's leakproofness, and because adopt case and disk seat looks mutual friction's mode, realized case and disk seat one-to-one adaptation, consequently, anastomotic error between case and the disk seat is little, the disability rate of work piece is low, the cost of effectual reduction work piece, the productivity ratio of ball valve is improved.

The valve core is placed in the first suspension liquid to be soaked, so that the first diamond particles are uniformly attached to the surface of the valve core, the spacing between the first diamond particles is kept to be basically consistent, and therefore the carbon content on the surface of the valve core can be uniformly changed, the valve seat is placed in the second suspension liquid, the second diamond particles are also uniformly attached to the surface of the valve seat, and the carbon content on the surface of the valve seat can be uniformly changed in the process.

0.06-0.80mol/L hydrochloric acid has low concentration, when the valve core and the valve seat are placed in hydrochloric acid solution for immersion, the hydrochloric acid can remove metal scraps and the like remained on the valve core and the valve seat, so as to ensure that the first wear-resistant layer can be integrally attached to the surfaces of the valve core and the valve seat when the first wear-resistant layer is attached to the surfaces of the valve core and the second wear-resistant layer, and because the valve core and the valve seat are soaked by the hydrochloric acid, the hydrochloric acid can corrode the surfaces of the valve core and the valve seat in the process, so that a plurality of grooves with the depth of 0.05-0.15 mu m are formed on the surfaces of the valve core and the valve seat, and under the concentration of 0.23mol/L hydrochloric acid, the time is 10.4min, the grooves are 0.83 mu m and form the optimal etching depth, the etching depth enables the surfaces of the valve core to be rough, so that when the wear-resistant layers are attached to the surfaces of the valve core and the valve seat, the groove is filled with the wear-resistant layer, and the contact area between the wear-resistant layer and the surfaces of the valve core and the valve seat is large in the process; and through hydrochloric acid soaking, it can be to remaining suspension to case and valve seat surface to when the wearing layer adheres to case and valve seat, can not receive the influence of suspension.

Further, the quantity of the first diamond particles contained in each 1ml of the first suspension is 30-45 particles, the quantity of the second diamond particles contained in each 1ml of the second suspension is 30-45 particles, the quantity of the first diamond particles in the first suspension is controlled to be 30-45 particles/ml, the first diamond particles are adhered to the valve core in a proper quantity when the valve core is soaked, the spacing between the first diamond particles on the valve core is maintained to be 0.20-0.45mm, the surface roughness of the valve core is basically maintained to be constant when the first diamond particles under the spacing are embedded on the valve core, the first wear-resistant layer adhered at the spacing is prevented from being partially hollow due to the fact that the spacing between the first diamond particles is too small, and if the particle size number of the first suspension powder is less than 45 particles, the number of the first diamond particles attached to the valve element is small, the amount of the first diamond particles changing the carbon concentration on the surface of the valve element is small, and when the first wear-resistant layer is attached, the effect of improving the adhesive force cannot be achieved between the first wear-resistant layer and the first diamond particles.

Similarly, the number of the second diamond particles in the second suspension is controlled to be 30-45 particles/ml, the number of the second diamond particles attached to the valve seat can be ensured to be proper, the spacing between the second diamond particles is maintained to be 0.20-0.45mm, the surface roughness of the valve seat is ensured, the second wear-resistant layer is conveniently attached, and the situation that the attached second wear-resistant layer is partially hollow due to the fact that the spacing between the second diamond particles is too small is avoided; if the particle size number of the second suspension powder is less than 45 particles, the number of the second diamond particles attached to the valve core is small, the amount of the second diamond particles changing the carbon concentration of the surface of the valve seat is small, and when the second wear-resistant layer is attached, the effect of improving the adhesive force between the second wear-resistant layer and the second diamond particles cannot be achieved.

Further, the parameters of the laser are set as follows: the power is 500-1500W, the laser frequency is 65-150KHZ, the pulse width is 67-310ns, and the scanning speed is 5000 mm/s; through setting up this parameter for the laser scanner is when the surface of case and disk seat is being swept, the top layer of gradual hot melt case and disk seat that can be even plays, thereby the diamond granule that makes is embedded into case and disk seat surface step by step in batches, thereby avoid to whole shining and leading to case and disk seat top layer synchronous by the hot melt to case and disk seat, lead to case and disk seat to appear sunken region and influence the cooperation relation between case and the disk seat, this power parameter still makes laser when shining, it can be quick form single melting zone on case and disk seat top layer, consequently, the cooperation between case and the disk seat is comparatively neat.

Further, the grinding apparatus comprises

A frame;

the first fixing piece penetrates through the medium flow passage;

a first driving member for driving the first longitudinal rotation;

the clamping structure is arranged on the first fixing piece and firmly abutted against the inner wall of the medium flow channel so as to fix the valve core;

a second fixing member;

the clamping structure is arranged on the second fixing piece and is used for clamping the valve seat so as to enable the valve seat to be in contact with the valve core;

and the second driving part is used for driving the second fixing part to rotate so as to drive the valve seat and the valve core to rub against each other. The valve core is driven to rotate by arranging the first driving part and the first fixing part, and then the valve seat is driven to rotate by the second driving part and the second fixing part, so that the valve core and the valve seat rotate relatively, the valve core and the valve seat rub against each other, the surfaces of the valve core and the valve seat are worn and smooth, and the size of the concave part on the valve seat and the outer wall of the valve core is just proper, so that no gap exists between the valve core and the valve seat; the clamping structure is firmly abutted against the inner wall of the medium flow channel, so that the valve core is fixed, and the situation that the valve core cannot rotate relative to the first fixing piece automatically in the rotating process is ensured; similarly, the valve seats of different specifications can be fixed through the clamping structure, and the valve cores of different specifications can be polished by the same equipment.

In conclusion, the surface of the first wear-resistant layer can be smooth, the friction force between the first wear-resistant layer and the valve seat can be reduced, the valve element can rotate more quickly, the first wear-resistant layer can ensure that the valve element and the valve seat can still keep a tight fit effect under the condition of continuous rotation, no gap is formed, the leakage of fluid in a pipeline is avoided, the waste of the fluid is avoided, and the safety of the pipeline is improved.

Drawings

FIG. 1 is a cross-sectional view of a valve cartridge according to the present invention.

Fig. 2 is an enlarged view of a in fig. 1.

Fig. 3 is a cross-sectional view of the valve seat of the present invention.

Fig. 4 is a sectional view of B in fig. 3.

FIG. 5 is a first schematic structural diagram of a polishing apparatus according to the present invention.

FIG. 6 is a second schematic structural view of a polishing apparatus according to the present invention.

FIG. 7 is a schematic view of a first partial structure of the polishing apparatus of the present invention.

Fig. 8 is an exploded view of fig. 3.

FIG. 9 shows two partial structures of the polishing apparatus of the present invention.

Fig. 10 is an enlarged view of C in fig. 9.

FIG. 11 is a schematic view of the structure of a rotating sleeve of the grinding apparatus of the present invention.

FIG. 12 is a schematic view of a third embodiment of the present invention.

FIG. 13 is a schematic view of a partial structure of a polishing apparatus according to the present invention.

Fig. 14 is an exploded view of fig. 13.

FIG. 15 is a schematic view of a partial structure of a polishing apparatus according to the present invention.

FIG. 16 is a schematic view showing a partial structure of a polishing apparatus according to the present invention.

FIG. 17 is a schematic view of a partial structure of a polishing apparatus according to the present invention.

Fig. 18 is a schematic partial structural view eight of the polishing apparatus of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1-4, the invention discloses a ball valve, which comprises a valve core 2 and a valve seat 3, wherein the valve core 2 is a metal ball with a medium flow channel 20, the valve seat 3 is a metal ring in sealing contact with the outer wall of the valve core 2, the surface of the valve core 22 is provided with a first wear-resistant layer 29, the first wear-resistant layer 29 is a diamond coating, the thickness of the first wear-resistant layer 29 is l-3 μm, the diamond coating is plated on the surface layer of the valve core 2 by adopting PVD or CVD technology, a second wear-resistant layer 39 is attached to the surface of the valve seat 3, the second wear-resistant layer 39 is also a diamond coating, and the second wear-resistant layer 39 is also plated on the surface of the valve seat 3 by PVD or CVD technology; in order to improve the carbon concentration on the surface of the valve core 2, before the first wear-resistant layer 29 is plated, a plurality of first diamond particles 28 are hot-melted on the surface of the valve core 2 by laser, the particle size of the first diamond particles 28 is 0.8-3 μm, after the first diamond particles 28 are fully hot-melted on the surface of the valve core 2, the distance between every two adjacent first diamond particles 28 is 0.20-0.45mm, and the height of the first diamond particles 28 exposed out of the surface of the valve core 2 after the hot melting is not more than 1 μm, so that the first wear-resistant layer 29 wraps the first diamond particles 28 when the first wear-resistant layer 29 is plated on the surface of the valve core 2.

Similarly, in order to improve the adhesion strength of the second wear-resistant layer 39 on the surface of the valve seat 3, a plurality of second diamond particles 38 are thermally fused on the surface of the valve seat 3 by laser irradiation before the second wear-resistant layer 39 is plated, the particle size of the second diamond particles 38 is also 0.8-3 μm, the distance between two adjacent second diamond particles 38 is 0.20-0.45mm after the second diamond particles 38 are fully thermally fused on the surface of the valve seat 3, and the height of the second diamond particles 38 exposed on the surface of the valve seat 3 after being thermally fused is not more than 1 μm, so that the second wear-resistant layer 39 wraps the second diamond particles 38 when being plated on the surface of the valve seat 3.

Furthermore, the invention also discloses a processing technology of the valve seat and the valve core, which comprises the following steps:

1) performing anastomosis treatment, namely enabling the valve core and the valve seat to be mutually contacted through grinding equipment, and then enabling the valve seat to rotate relative to the valve core, so that the valve seat and the outer wall of the valve core are rubbed until the valve core and the valve seat reach a preset specification size, and the valve core and the valve seat are completely anastomosed;

2) immersing a valve core in a first suspension liquid dispersed with first diamond particles, wherein the first suspension liquid is a mixed liquid containing a small amount of glue and a large amount of water, the first diamond particles are dispersed in the first suspension liquid, and the number of the first diamond particles in the first suspension liquid is 45 particles/ml; when the valve core is placed in the first suspension, the first suspension is stirred by a stirring motor until the valve core is taken out; the valve seat is immersed in a second suspension liquid which is a mixed liquid containing a small amount of glue and a large amount of water and is dispersed in second diamond particles, wherein the number of the second diamond particles in the second suspension liquid is 45 particles/ml; when the valve seat is placed in the second suspension liquid, the second suspension liquid is stirred through a stirring motor until the valve seat is taken out;

3) the laser is adopted to irradiate laser to scan the surfaces of the valve core and the valve seat so as to fuse the surface layers of the valve seat and the valve core, and the parameters of the laser are set as that the power is 500w, the laser frequency is 65KHz, the pulse width is 67ns, and the scanning speed is 5000 mm/s;

4) after the laser scanning is finished, after the valve core and the valve seat are cooled to normal temperature, placing the valve core and the valve seat in hydrochloric acid with the concentration of 0.035mol/L for soaking and cleaning for 8 min; in the process, hydrochloric acid forms a plurality of grooves with the depth of 0.05 mu m on the surfaces of the valve core and the valve seat;

5) the first wear-resistant layer is attached to the surface of the valve core by adopting the DVD technology, and the second wear-resistant layer is attached to the surface of the valve seat by adopting the DVD technology.

Further, as shown in fig. 5 to 14, the grinding apparatus includes a frame 1, a first fixing member 4, a first driving member 5, a clamping structure 6, a second fixing member 7, a clamping structure 8, and a second driving member 9, wherein the frame 1 is a metal frame, the first driving member and the second driving member are both disposed on the frame 1, the first fixing member 4 is a metal rod, a tail end of the first fixing member 4 is connected to a lower portion of the frame 1 through a bearing member, so that the first fixing member 4 can freely rotate relative to the frame 1, the first driving member 5 is configured to drive the first fixing member 4 to rotate, the first driving member 5 includes a first driving member 51, a first output wheel 52, a first driving belt 53, and a first driven wheel 54, the first driving member 51 is a motor, the first output wheel 52 is a belt pulley connected to the first driving member 51, the first driven wheel 54 is a metal wheel, the first driven wheel 54 is connected to the end of the first fixed member 4 in a rotation-stopping manner, the first transmission belt 53 is a belt, and the first transmission belt 53 connects the first output wheel 52 and the first driven wheel 54, so that the first driving member 51 can drive the first fixed member 4 to rotate, and the first fixed member 4 rotates clockwise in a front view.

Furthermore, the clamping structure 6 includes a clamping member 61, an anti-slip member 62 and a rotating member 63, the clamping member 61 is a metal sheet with a higher thickness, the first fixing member 4 is provided with an accommodating cavity 40, the accommodating cavity 40 is provided with a plurality of strip-shaped open slots 41 arranged at intervals, the clamping member 61 can pass through the open slots 41, the clamping member 61 is located in the accommodating cavity 40, the anti-slip member 62 is a wear-resistant plastic block, the anti-slip member 62 is connected with the clamping member 61, the specific connection mode is that the lower part of the clamping member 61 is provided with a strip-shaped socket groove 619, the upper part of the anti-slip member 62 is provided with a strip-shaped socket convex part 629, the socket convex part 629 can be inserted into the socket groove 619, and the socket convex part 629 and the inner wall of the socket groove 619 are in interference fit, after the socket convex part 629 is inserted into the socket groove 619, the anti-skid part 62 is connected with the clamping part 61 through screws, a plurality of anti-skid convex ribs 628 are arranged on the anti-skid part 62, and the anti-skid convex ribs 628 and the anti-skid part 62 are integrally formed; the rotating member 63 rotates to move the clamping member 61 outward, so that the anti-slip ribs 628 are engaged with the inner wall of the medium flow path 20.

By arranging the clamping piece and the rotating piece, the clamping piece is outwards opened when the rotating piece rotates, thereby the anti-skid component will be propped against the inner wall of the medium flow channel, the valve core and the clamping component are tightly connected, the contact between the valve seat and the valve core is ensured, the valve core can not shake up and down, and the valve cores with different specifications and sizes are fixed, the arrangement also facilitates that the rotating part can withdraw the clamping part when the valve core is installed, so that the valve core can be sleeved on the first fixing part easily, and the fixing mode is simple and quick; and the anti-skid piece is arranged and is contacted with the inner wall of the medium flow passage, therefore, the valve core and the first fixing piece cannot slip; and the setting of antiskid piece can also avoid chucking spare and the inner wall direct contact of medium runner and take place wearing and tearing, and the inner wall of guarantee medium runner is smooth.

Specifically, the rotating member 63 is a metal rod, one end of the rotating member 63 is movably connected with the inner wall of one end of the accommodating cavity 40 through a bearing, a plurality of pushing convex parts 631 are arranged on the rotating member 63, the pushing convex parts 631 are bent to form a C-shaped metal strip, a plurality of pushing openings 611 are arranged at the lower part of the clamping member 61, and the pushing convex parts 631 penetrate into the pushing openings 611, so that when the rotating member 63 rotates, the pushing convex parts 631 can drive the clamping member 61 to expand outwards or contract inwards; the other end of the rotating part 63 is connected with the first fixing part 4 through a locking structure 64; through establishing the promotion convex part into crooked form, when rotating the piece and rotating, can outwards expand or withdraw chucking spare, this in-process has realized receiving and releasing chucking spare, and because be equipped with the promotion opening on chucking spare, consequently when chucking spare receives the pressure of the inner wall of flow channel, promote open-ended upper portion inner wall and can contact with the upper portion that promotes the convex part, and promote open-ended lower part inner wall and can offset with the lower part that promotes the convex part, ensured through this mode that chucking spare can not move down, its stability is high.

Further, the locking structure 64 includes a rotating sleeve 641, a locking sleeve 642 and an elastic element 643, the rotating sleeve 641 is a metal sleeve, the outer wall of the rotating sleeve 641 has a plurality of cutting surfaces so that the rotating sleeve 641 has a shape substantially similar to that of a nut, the rotating sleeve 641 is connected with the rotating member 63 in a rotation-stop manner, specifically, a cylindrical connecting convex portion 649 is provided on the inner wall of the rotating sleeve 641, a square cylindrical connecting concave portion 639 is provided on the end portion of the rotating member 63, the connecting convex portion 649 is inserted into the connecting concave portion 639, and then passes through the connecting convex portion 639 by a screw to be connected with the rotating member 63; the connection mode utilizes the local thickness of the connection convex part 63 to be large, so that a long screw can be connected with the rotating part, the connection stability is good, the valve core is not easy to fall off, the rotating sleeve can be conveniently rotated to enable the clamping piece to expand outwards when the valve core needs to be fixed, the clamping piece can be used for fixing the valve core, the locking sleeve is arranged, the rotating sleeve is positioned through the mutual clamping between the first biting teeth and the second biting teeth, the rotating sleeve can not rotate in the using process, so that the rotating part cannot rotate in the using process, the stability is high, the elastic part is arranged to keep the first biting teeth and the second biting teeth meshed together, when the rotating is needed, the locking sleeve is pushed backwards only to enable the first biting teeth and the second biting teeth to be disengaged, and the first biting teeth and the second biting teeth are arranged on the rotating sleeve, The locking sleeve is provided with a second snap tooth which can quickly limit each other when the rotating sleeve is connected with the locking sleeve.

Specifically, a locking sleeve 642 is sleeved on the first fixing member 4, and the locking sleeve 642 is a metal sleeve; a plurality of anti-rotation protrusions 647 are arranged on the inner wall of the locking sleeve 642, the anti-rotation protrusions 647 are square metal strips, a plurality of anti-rotation grooves 401 are arranged on the outer wall of the first fixing member 4, the anti-rotation protrusions 647 are inserted into the anti-rotation grooves 401, so that the locking sleeve 642 is in anti-rotation connection with the first fixing member 4, the elastic element 643 is a high-strength spring, one end of the elastic element 643 is connected with the inner wall of the anti-rotation groove 401, the other end of the elastic element 643 is connected with the anti-rotation protrusions 647, so that the elastic element 643 pushes the locking sleeve 642 to move towards the direction of the rotating sleeve 641, dense first snap teeth 645 are arranged on the end of the rotating sleeve 641, second snap teeth 646 are arranged on the locking sleeve 642, the second snap teeth 642 are meshed with the first snap teeth, so that the locking sleeve 642 is in anti-rotation connection with the rotating sleeve 641, the first fixing member 4 may be divided into an upper half and a lower half, and the upper half and the lower half are welded together without a seam after the internal components are mounted.

Further, the second fixing member 7 is an L-shaped metal rod, the second fixing member 7 is driven by the second driving member 8 to rotate, the second driving member 8 is disposed on the upper portion of the frame 1, the second driving member 8 includes a second driving member 81, a second output wheel 82, a second transmission belt 83 and a second driven wheel 84, the second driving member 81 is a motor, the second driving member 81 is disposed on the frame 1, the second output wheel 82 is a belt pulley connected to the second driving member 81, the second driven wheel 84 is a belt pulley, the upper end of the second fixed member 7 is connected with the second driven wheel 84, therefore, under the power of the second driving element 81, the second fixing element 7 can rotate clockwise in the top view; a clamping structure 9 is arranged on the second fixing part 7, and the clamping structure 9 is connected with the valve seat 3;

specifically, the clamping structure 9 includes a telescopic rod 91, a first spring 92, a rotating member 93 and a clamping member 94, the telescopic rod 91 is a metal telescopic rod, the upper end of the telescopic rod 91 is connected to the second fixing member 7 in a manner that the upper end of the telescopic rod 91 is connected by a screw, the first spring 92 is a metal spring, the first spring 92 is sleeved on the telescopic rod 91, the upper end of the first spring 92 is detachably connected to the second fixing member 7, the lower end of the first spring 92 is connected to the telescopic rod 91, so that the first spring 92 pushes the telescopic rod 91 to stretch downwards, the rotating member 93 is a metal rod with a rotating ball 931 at the upper part, the rotating ball 931 is a metal ball, a sleeved part is formed at the lower part of the telescopic rod 91 by being recessed inwards, the rotating ball 931 penetrates into the sleeved part, so that when the second fixing member 7 rotates, the rotary member 93 is swung, and the clamping member 95 is coupled to a lower end of the rotary member.

Specifically, the clamping member 95 includes a separation preventing plate 951 connected to a lower end of the rotary member 93, a telescopic cavity 952 formed in the separation preventing plate 951, a clamping piece 953, and a second spring 954, the separation preventing plate 951 is a metal plate, the telescopic cavity 952 is a sector cavity formed in the separation preventing plate 951, the clamping piece 953 is a sector, the clamping piece 953 partially penetrates into the telescopic cavity 952, the clamping piece 953 has a clamping portion 961 bent downward, the clamping portion 961 contacts with an outer wall of the valve seat 3, so that the clamping portion 961 clamps the clamping piece 953, the second spring 954 is a metal spring, the second spring 954 is located in the telescopic cavity 952, one end of the second spring 954 is connected to an inner wall of the telescopic cavity 952, the other end of the second spring 954 is connected to an end of the clamping piece 953, an elastic force of the second spring 954 pulls the clamping piece 953 to move inward, a protective layer 962 is adhered to an inner wall of the clamping portion 961, the protective layer 962 can be a flannelette layer, the protective layer 962 is directly contacted with the outer wall of the valve seat 3, in order to facilitate the valve seat 3 to directly penetrate into the clamping part 961, the end part of the clamping part 961 is bent upwards and tilted to form a bending part 963, the bending part 963 can facilitate the valve seat 3 to be directly inserted, the protective layer 962 can effectively avoid the abrasion caused by the contact between the clamping piece 953 and the outer wall of the valve seat 3, the outer wall of the valve seat is protected, the service life of the clamping piece is prolonged, and the valve seat can adapt to valve seats of different specifications and sizes through the scalability of the clamping piece in the telescopic cavity, and can effectively fix the valve seat.

Further, an extension portion 964 is provided on the clip 953, the extension portion 964 is opposite to the clamping portion 961, a square hole 965 is provided on the extension portion 964, a locking piece 971 is inserted into each square hole 965, the locking piece 971 is a metal piece, an end of the locking piece 971 is protruded such that the locking piece 971 can be pulled out only from one side of the square hole 965, and a plurality of recesses 972 are provided on the locking piece 971; a plurality of locking pieces 981 are movably connected to the anti-disengaging plate 951, each locking piece 98 corresponds to one locking sheet 971, three locking convex portions 982 which are arranged in a staggered mode are arranged below the locking pieces 98, each locking convex portion 982 is a metal convex portion which is bent into an arc shape, each locking convex portion 982 penetrates into one of the concave portions 972, and when one locking convex portion 982 rotates out of the corresponding concave portion 972, the other locking convex portion 982 can enter into the other adjacent concave portion 972; this is achieved by the continuous rotation of the locking member 98, thereby allowing the locking flap 971 to be continuously pulled.

The upper portion of the locking member 98 is provided with a first gear 983, the rotating member 93 is sleeved with a second gear 984, the volume of the second gear 984 is larger than that of the first gear 983, the second gear 984 is meshed with the first gears 983 at the same time, so that the second gear 984 rotates to drive the first gear 983 to rotate, all the locking members 98 are driven to rotate synchronously, and therefore the locking piece 971 is retracted, the rotating member 93 is sleeved with an operating member 985 for enabling a hand to rotate the second gear 983, the operating member 985 is a metal sleeve, the second gear 983 is connected, the operating member 985 is provided with a plurality of circular holes, the rotating member 93 is also provided with circular holes, and after rotation is completed, a metal column is inserted into the two circular holes.

The grinding equipment can be used for grinding the valve seat and the valve core at the same time, and the same equipment can be used for grinding the valve cores and the valve seats with different specifications in a matching way, so that the processing efficiency of the surfaces of the valve cores and the valve seats is improved.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.