WO2023051042A1 - Stop valve and production process therefor - Google Patents

Abstract

Disclosed are a stop valve and a production process therefor. The stop valve is machined by means of an automated special purpose stop valve machine. The automated special purpose stop valve machine comprises an annular rotary table having multiple angles and which can rotate, and multiple machining stations distributed along the rotary table. The multiple stations each perform machining of three channels of a valve body (100) and a valve opening (101), and perform tapping and chamfering on the valve body (100). The automated special purpose stop valve machine performs finishing machining on the valve opening (101) at the upper end of the stop valve, thereby reducing a degree of roughness of the inner surface of the valve opening (101) to less than or equal to 0.4. Furthermore, a finishing machine head is configured to perform finishing machining on the valve opening (101).

Description

A cut-off valve and its production process technical field

The invention belongs to the technical field of stop valves, in particular to a stop valve and its production process.

Background technique

Air conditioner cut-off valve, also known as cut-off valve, is a forced sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from the bottom of the disc, the resistance that the operating force needs to overcome is the friction between the valve stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve must be large, otherwise the failure of the valve stem to bend will occur. According to the connection method, it can be divided into three types: flange connection, screw connection and welding connection. After the emergence of self-sealing valves, the flow direction of the medium of the globe valve is changed to enter the valve cavity from the top of the disc. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be adjusted accordingly. reduced.

However, the position of the valve hole of the globe valve is usually hard sealed, so the requirements for the roughness of the hole wall of the valve hole are relatively high. However, the traditional automatic globe valve machine only processes the valve body, and the inner wall of the valve hole needs to be removed after the valve body. It is processed on a special finishing machine tool, which affects the efficiency of processing.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a shut-off valve with good sealing performance and its production process.

In order to achieve the above object, the present invention provides the following technical solutions: a cut-off valve, including a three-way valve body, a valve cavity is formed in the center of the body, and a valve hole penetrating to the valve cavity is provided at the upper end of the valve body. The roughness of the inner wall of the valve hole is less than or equal to 0.4, and an annular groove is arranged on the valve hole;

In the production process of the cut-off valve, the cut-off valve is processed by an automatic cut-off valve machine. The automatic stop valve machine includes a circular turntable with several angles and can rotate, and a number of processing stations distributed along the turntable. The station processes the three channels and the valve hole of the valve body, and taps and chamfers the valve body. The automatic stop valve machine includes finishing the valve hole at the upper end of the stop valve, thereby reducing the inner surface of the valve hole. The roughness is less than or equal to 0.4, and the valve hole is finished by setting a finishing machine head. The finishing machine head is set on the servo slide table where the sliding table carriage moves vertically. The finishing machine head includes

Drive the motor, the drive motor is controlled by the external frequency converter,

The machine head assembly has a transmission mechanism inside the machine head assembly, and the transmission machine head is driven by a drive motor to run.

Collet, the collet is arranged at the lower end of the machine head assembly, driven to rotate by the machine head assembly, and the end face of the collet is provided with a fixed hole and a receiving hole connected to each other inwardly,

The tool, the tool is fixed on the chuck through the fixing hole, and the tool is provided with a cooling hole, and the cooling hole communicates with the fixing hole,

Fixed ring, the fixed ring is set on the upper end of the tool, the tool is fixed on the chuck through the fixed changer, and a number of diversion grooves are opened on the side wall of the fixed ring, the diversion grooves extend to the outer end surface of the fixed ring, and the diversion The groove communicates with the fixing hole, wherein the tool is in interference fit with the fixing ring. A limiting groove is provided on the inner wall of the fixing hole, and a flange protrudes from the outer side of the peripheral wall of the fixing ring, and the flange is correspondingly clamped in the limiting groove. By fitting the flange of the fixing ring into the limiting groove inside the fixing hole, the fixing ring is further fixed to avoid loosening and displacement of the fixing ring.

The present invention is further set to: the finishing machine head also includes

Connecting sleeve, the cross-section of the vertically arranged connecting sleeve is set on the chuck, including the upper connecting section, the receiving section and the lower connecting section, and an arc-shaped buffer is formed on the receiving section near the outer wall of the chuck groove,

A protruding mounting edge is formed in the middle of the chuck, and the upper and lower connecting segments of the connecting sleeve are respectively clamped on the two side end faces of the mounting edge so that the connecting sleeve and the mounting edge are rotationally connected. A number of evenly distributed water inlet holes are provided on the side wall of the installation edge, and the water inlet holes are connected to the receiving holes. Water inlet holes are provided on the receiving section of the connecting sleeve, and the water inlet holes are connected to the buffer tank. A water inlet joint is provided on the water inlet hole; and a sealing support is provided between the upper connection section and the upper end surface of the installation edge, and between the lower connection section and the lower end surface of the installation edge. The upper end of the connecting sleeve is provided with a connecting rod fixedly connected with the head assembly, so that the connecting sleeve is in a state of prohibiting the head assembly.

The present invention is further configured as follows: an inner installation groove is provided on both side end faces of the installation edge, an outer installation groove is arranged on the inner side of the upper connection section and the lower connection section, and the sealing support is arranged in the inner installation groove and the outer installation groove. Between the grooves; the inner side of the outer mounting groove is provided with an annular groove, and the cross-sectional width of the annular groove is smaller than the cross-sectional width of the outer mounting groove.

The seal support includes

an inner seal receiving part, the inner seal receiving part is arranged on the inner installation groove,

an intermediate seal, the intermediate seal is arranged on the outer installation groove and extends like the inner installation groove and is against the lower inner seal receiving member,

The outer seal strengthening member is arranged on the annular groove, extends into the outer mounting groove and abuts against the middle sealing member.

The present invention is further set as: the inner seal receiving part includes

The lower seal receiving ring is set at the bottom of the inner installation groove and is offset against the bottom of the inner installation groove, and two groups of holes are arranged coaxially on the lower seal receiving ring, and each group of hole groups is composed of several cylinders. The installation holes are evenly distributed. The bottom of the installation holes is tapered and passes through the lower sealing ring.

A wear-resistant rolling ball, each of the placement holes is provided with a wear-resistant rolling ball, and the outside of the wear-resistant rolling ball is provided with a ball sleeve, the wear-resistant rolling ball is free to roll relative to the ball sleeve, and the wear-resistant rolling ball The bottom of the mounting hole extends from the bottom of the mounting hole, the top of the wear-resistant rolling ball extends out of the port of the mounting hole, and the diameter of the bottom of the mounting hole is smaller than the diameter of the wear-resistant rolling ball.

The upper seal receiving ring is arranged on the upper end of the lower sealing receiving ring, and the upper sealing receiving ring is offset against the wear-resistant rolling ball, and is rotationally connected with the lower sealing receiving ring through the wear-resistant rolling ball. Wherein the upper sealing receiving ring and the lower sealing receiving ring are both made of wear-resistant metal materials.

The present invention is further configured as follows: the section width of the upper seal receiving ring is greater than the width of the lower seal receiving ring, and there are downward extending limit edges formed on both sides of the end of the upper seal receiving ring adjacent to the lower seal receiving ring, so that The lower seal receiving ring mentioned above is stuck between the two limit edges,

In addition, a number of coaxially arranged lower seal receiving grooves are provided on the side of the lower seal receiving ring near the bottom of the inner installation groove, and the lower seal receiving grooves and hole groups are alternately distributed.

The ball sleeve is made of self-lubricating soft metal material, and the inner end surface of the upper sealing receiving ring is in clearance fit with the outer end surface of the lower sealing receiving ring under the support of wear-resistant rolling balls;

On the side where the upper sealing ring is opposed to the wear-resistant rolling ball, an upper chute matching with the wear-resistant rolling ball is provided, and the bottom of the inner installation groove is provided with a sliding groove matching with the wear-resistant rolling ball;

And on the outer end surface of the lower seal receiving ring, a lower sealing receiving rib is arranged, and the end of the lower sealing receiving rib is in the shape of a semicircular arc top, and is provided on the inner end surface of the upper sealing receiving ring. There are a number of evenly distributed upper seal receiving grooves, and an upper seal receiving sleeve is arranged in the upper sealing receiving groove to resist and match the lower sealing receiving rib, and the upper sealing receiving sleeve is made of polytetrafluoroethylene; And arc-shaped lubricating grooves are respectively arranged on the inner ring surface and the outer ring surface of the upper sealing receiving ring, and the described lubricating grooves are filled with solid lubricant; and in the lower sealing receiving groove, A lower sealing receiving ring is provided, and the lower sealing receiving ring is made of vulcanized rubber.

The present invention is further set as: the intermediate seal includes

The lower seal support part, the lower seal support part is against the upper seal receiving ring,

The upper sealing part, the upper sealing part is located inside the lower sealing support part, and the upper sealing part is a V-shaped sealing structure composed of two mutually symmetrical sealing fins,

Wherein the two sides of the lower sealing support part are against the outer side walls of the outer installation groove, and the two sides of the upper sealing part are against the inner side walls of the outer installation groove,

Wherein the two sides of the lower seal support part are respectively formed with seal receiving parts, and the said lower seal support part abuts against the outer mounting groove through the seal receiving part, and is arranged on the connection between the side wall of the seal receiving part and the two ends. There are curved joints.

By adopting the above-mentioned technical solution, the lower seal support part and the upper seal receiving ring can ensure the sealing effect of the connection between the intermediate seal and the inner seal receiving part, and the two sides of the lower seal support part form a seal receiving part, and The seal receiving part is in contact with the outer installation groove, so as to ensure the sealing effect between the upper sealing part and the outer installation groove; the upper sealing part is V-shaped, and is in contact with the side wall of the outer installation groove, so as to further ensure the sealing effect between the middle seal and the outer installation groove. The sealing effect between the outer mounting grooves.

The present invention is further set as follows: the sealing fin is inclined outward from the lower sealing support part to the bottom of the mounting groove, and the thickness of the sealing fin decreases gradually from the lower sealing support part to the bottom of the mounting groove. The tail of the sealing fin forms a curved sealing top,

A transition groove with an included angle of 95-105° is formed between the inner sidewalls of the two outwardly inclined sealing fins, and a transition groove is formed between the outer sidewalls of the inclined sealing fins and the end surface of the sealing receiving part. There is an included angle of 60-70°;

And the inner sidewalls of the two sealing fins are connected through an arc surface connecting section;

A concave middle groove is formed on the side of the lower seal supporting part close to the upper seal receiving ring. The upper seal receiving ring is stuck on the middle groove, and several coaxially arranged middle The sealing groove, and the upper sealing rib matching the middle sealing groove is formed on the upper sealing receiving ring.

The present invention is further set as: the outer sealing reinforcement includes

The sealing setting ring, the sealing setting ring with a cross-section is clamped at the bottom of the annular groove, and is fixed by a sealing adhesive,

A sealing pressing block, the sealing pressing block is arranged in the sealing setting ring, and is in an interference fit with the sealing setting ring, and the end of the sealing pressing block away from the sealing setting ring is against the intermediate seal,

Compression bolts, the number of compression bolts evenly distributed on the circumference are against the end face of one side of the sealing pressure block located in the sealing installation ring, and are squeezed with the sealing pressure block through thread engagement.

The sealing receiving piece, the sealing receiving piece is made of metal material, is arranged on the end surface of one side of the sealing pressing block located in the sealing installation ring and is fixedly connected with the end surface of the sealing pressing block through an adhesive; and the sealing receiving piece is connected with the sealing installation ring The ring clearance fits, and the compression bolt exerts pressure on the sealing pressing block through the sealing receiving piece. The briquetting block is made of plastic alloy as a whole.

The present invention is further set as follows: threaded holes extending inward and communicating with the annular groove are respectively provided on the outer end surfaces of the upper connecting section and the lower connecting section, and the pressing bolts are threadedly connected to the threaded holes and passed through the threaded holes. Insert into the annular groove, and the seal setting ring is provided with through holes corresponding to the threaded holes one by one and communicating with the threaded holes,

The sealing briquetting block is a ring-shaped structure with a rectangular cross-section, and a protruding pressure top is formed on the side of the sealing briquetting block close to the intermediate seal. The transition grooves between the fins are similar and have an interference fit with the transition grooves; the end face of the sealing arrangement ring is flush with the end face of the annular groove.

The present invention is further set as: the automatic cut-off valve machine also includes a cooling water pump, a cooling water tank, a cooling pipe, a cooling solenoid valve and a control cabinet, and a controller and a control circuit are arranged in the control cabinet, a cooling water tank, a cooling water pump, a cooling solenoid valve and an inlet The water joints are connected sequentially through cooling pipes,

And the controller obtains the current speed V of the drive motor from time to time in the finishing process; compares V with the preset speed set, and obtains the magnitude relationship between V and the preset speed; according to the magnitude relationship, adjust The output power of the cooling water pump, wherein the preset speed includes the upper limit preset speed V2, the middle preset speed V1 and the lower limit maintenance speed V0, V2>V1>V0, and adjust the output power of the cooling water pump according to the size relationship ,include:

When V0<V<V1, control the output power of the cooling water pump to P1,

When V2≥V≥V1, the control maintains the output power of the cooling water pump to P2,

When V>V2, control the output power of the cooling water pump to P3;

Wherein the output power P1<P2<P3,

When V<V1, the output power of the cooling water pump is low; when V≥V1, it will enter the cooling mode faster,

When V≤V0, the cooling water pump is controlled to stop running.

Compared with the prior art, the present invention possesses following advantages:

1. By setting a cooling hole on the tool, setting a fixing hole and a receiving hole in the chuck, injecting cooling cutting fluid into the receiving hole, the cooling cutting fluid flows out through the cooling hole of the tool, thereby cooling the inside of the tool, and Part of the cooling will flow down from the side wall of the tool through the diversion groove, thereby cooling the outside of the tool, thereby cooling the overall tool temperature, avoiding the accelerated wear of the tool due to excessive temperature, prolonging the service life of the tool, and reducing precision. The maintenance cost of the processing head;

2. By setting the connecting sleeve to connect with the external water inlet pipe, the connecting sleeve is connected with the installation along the rotation, so that the connecting sleeve does not follow the rotation of the chuck during the rotation, thereby preventing the cooling pipe connected to the water inlet joint from being entangled broken;

3. By setting the inner seal receiver, the lower seal receiver ring is in contact with the bottom of the inner installation groove, the upper seal receiver ring is in contact with the middle seal, and the upper seal receiver ring and the lower seal receiver ring are passed by wear-resistant rolling balls Its supporting and receiving function, so as to achieve a good effect of rotating and receiving between the connecting sleeve and the collet, so as to ensure the sealing effect and avoid wear between the connecting sleeve and the collet;

4. By setting the intermediate seal, the opening angle of the two seal fins on the intermediate seal is 95-105°, so as to ensure the structural strength of the two seal fins, and the outer wall of the seal fin and the seal receiving part An angle of 60-70° is formed between the end faces, so as to ensure the sealing effect between the sealing fin and the inner wall of the outer installation groove; and the cooperation between the upper sealing rib and the middle sealing groove can further improve the sealing performance of the middle seal. The sealing effect between the inner seal receiving part;

5. By setting the outer sealing reinforcement to squeeze the upper sealing part of the intermediate seal as a whole, the sealing fins are deformed and in close contact with the inner installation groove, thereby further improving the connection between the intermediate seal and the inner installation groove Sealing effect; and the end face of the seal setting ring is flush with the end face of the annular groove, so as to prevent the seal setting ring from abutting against the intermediate seal and causing damage to the intermediate seal.

Description of drawings

Fig. 1 is the structural representation of shut-off valve of the present invention;

Fig. 2 is the structural representation of finishing head in the present invention;

Fig. 3 is a partial cross-sectional schematic diagram of the middle finishing machine head of the present invention;

Fig. 4 is a partial enlarged view of place I in Fig. 3;

Fig. 5 is a partial enlarged view of II in Fig. 4;

Fig. 6 is a partial enlarged view of III in Fig. 3;

The marks in the drawings and the corresponding part names: 1-drive motor, 2-head assembly, 3-clamp, 3a-fixing hole, 3b-receiving hole, 3c-installation edge, 3d-water inlet hole, 4-tool , 4a-cooling hole, 5-fixing ring, 5a-guiding groove, 6-connecting sleeve, 6a-upper connecting section, 6b-undertaking section, 6c-lower connecting section, 6d-water inlet hole, 7-buffer tank, 8-Water inlet joint, 9-Inner installation groove, 10-Outer installation groove, 11-Lower seal receiving ring, 12-Setting hole, 13-Wear-resistant rolling ball, 14-Ball sleeve, 15-Upper seal receiving ring, 16 -limiting edge, 17-lower seal receiving groove, 18-upper chute, 19-down slide groove, 20-lower sealing receiving rib, 21-upper sealing receiving sleeve, 22-lubricating groove, 23-lower sealing receiving ring, 24 -lower seal support part, 25-seal fin, 26-seal receiving part, 27-arc connection part, 28-arc surface seal top, 29-arc connection section, 30-middle groove, 31-upper seal rib , 32-sealing placement ring, 33-annular groove, 34-sealing briquetting block, 35-pressing bolt, 36-sealing receiving piece, 37-pressing top, 100-valve body, 101-valve hole.

Detailed ways

The embodiment of the present invention will be further described with reference to FIG. 1 to FIG. 6 .

A stop valve, comprising a three-way valve body, a valve cavity is formed in the center of the body, and a valve hole 101 penetrating to the valve cavity is provided on the upper end of the valve body, and the roughness of the inner wall of the valve hole 101 is less than or equal to 0.4, And an annular groove is provided on the valve hole 101;

In the production process of the cut-off valve, the cut-off valve is processed by an automatic cut-off valve machine. The automatic stop valve machine includes a circular turntable with several angles and can rotate, and a number of processing stations distributed along the turntable. The station respectively processes the three channels of the valve body 100 and the valve hole 101, and taps and chamfers the valve body 100. The automatic stop valve machine includes finishing the valve hole 101 at the upper end of the stop valve, thereby reducing the The roughness of the inner surface of the valve hole 101 is less than or equal to 0.4, and the finishing of the valve hole 101 is carried out by setting a finishing machine head, and the finishing machine head is arranged on the servo slide table on which the carriage carriage moves vertically.

Embodiment one

A finishing head comprising

Drive motor 1, drive motor 1 is controlled and driven by an external frequency converter,

The head assembly 2 has a transmission mechanism in the head assembly 2, and the drive head is driven by the drive motor 1 to run,

The collet 3, the collet 3 is arranged at the lower end of the head assembly 2, driven to rotate by the head assembly 2, and the end face of the collet 3 is provided with a fixed hole 3a and a receiving hole 3b communicating with each other inwardly,

The tool 4 is fixed on the collet 3 through the fixing hole 3a, and the tool 4 is provided with a cooling hole 4a, and the cooling hole 4a communicates with the fixing hole 3a,

The fixed ring 5, the fixed ring 5 is set on the upper end of the cutter 4, the cutter 4 is fixed on the chuck 3 by fixing, and the side wall of the fixed ring 5 is provided with a plurality of diversion grooves 5a. The sidewall cutting grooves are fan-shaped in several equal parts, and the diversion groove 5a extends to the outer end surface of the fixing ring 5, and the diversion groove 5a communicates with the fixing hole 3a, wherein the cutter 4 and the fixing ring 5 have an interference fit. The inner side wall of the fixing hole 3a is provided with a limiting groove, and the outer side of the peripheral wall of the fixing ring 5 is protruded with a flange, and the flange is correspondingly clamped in the limiting groove. By fitting the flange of the fixing ring 5 into the limiting groove inside the fixing hole 3a, the fixing ring 5 is further fixed to prevent the fixing ring 5 from loosening and shifting.

The valve hole 101 of the valve body 100 is finished by the added finishing head, so that the efficiency of the automatic cut-off valve can be guaranteed and the labor cost can be reduced.

By setting the cooling hole 4a on the tool 4, setting the fixing hole 3a and the receiving hole 3b in the chuck 3, and injecting the cooling cutting fluid into the receiving hole 3b, the cooling cutting fluid flows out through the cooling hole 4a of the tool 4, thereby The inside of the cutting tool 4 is cooled, and the cooling cutting fluid flowing out can wash away the metal chips on the valve body 100 and cool down the valve body 100 at the same time, and part of the cooling will flow down from the side wall of the cutting tool 4 through the diversion groove 5a, thereby cooling the cutting tool. 4 to cool the outside of the tool 4, so as to cool down the overall temperature of the tool 4, avoid the accelerated wear of the tool 4 due to excessive temperature, prolong the service life of the tool 4, thereby reducing the maintenance cost of the finishing machine head, and the flow of cooling cutting fluid It can reduce the stay of iron filings in the valve hole 101, avoiding the wear of the valve hole 101 caused by later assembly of the shut-off valve, thereby affecting the overall yield of the shut-off valve.

Embodiment two

Further on the basis of embodiment one: the finishing machine head also includes

Connecting sleeve 6, the cross-section of which is arranged longitudinally is arranged on the collet 3, including the upper connecting section 6a, the receiving section 6b and the lower connecting section 6c. One layer is formed with an arc-shaped buffer groove 7,

A protruding installation edge 3c is formed in the middle of the chuck 3, and the upper connection section 6a and the lower connection section 6c of the connecting sleeve 6 are respectively clamped on the two side end faces of the installation edge 3c so that the connection sleeve 6 and the installation edge 3c is a rotary connection. A number of evenly distributed water inlet holes 3d are provided on the side wall of the chuck 3 along the 3c. The water inlet holes 3d communicate with the receiving hole 3b. In the receiving section 6b of the connecting sleeve 6 A water inlet hole 6d is provided on the top, and the water inlet hole 6d is connected to the buffer tank 7, and a water inlet joint 8 is arranged on the water inlet hole 6d; A sealing support is provided between 6c and the lower end surface of the installation edge 3c. The upper end of the connecting sleeve 6 is provided with a connecting rod fixedly connected with the head assembly 2 , so that the connecting sleeve 6 is in a state of prohibiting the head assembly 2 at first.

The connection sleeve 6 is connected to the external water inlet pipe, and the connection sleeve 6 is connected to the installation along 3c in rotation, so that the connection sleeve 6 does not follow the rotation of the chuck 3 during the rotation, thereby preventing the connection to the water inlet joint 8 The cooling pipe is wound and broken; and a sealing support is provided to ensure the sealing effect of the connection between the connecting sleeve 6 and the chuck 3 . The arrangement of the buffer groove 7 can facilitate the better flow of the cooling cutting fluid, thereby preventing the cooling and cutting fluid from generating high pressure in the connecting sleeve 6 .

Embodiment three

Further on the basis of the second embodiment: inner installation grooves 9 are provided on both sides of the installation edge 3c, outer installation grooves 10 are arranged on the inner side of the upper connecting section 6a and the lower connecting section 6c, and the sealing support Be arranged between the inner installation groove 9 and the outer installation groove 10; the inner side of the outer installation groove 10 is provided with an annular groove 33, and the cross-sectional width of the annular groove 33 is less than the cross-sectional width of the outer installation groove 10,

The seal support includes

The inner seal acceptor, the inner seal acceptor is arranged on the inner installation groove 9,

The intermediate seal, the intermediate seal is arranged on the outer installation groove 10 and extends like the inner installation groove 9 and abuts against the lower inner seal receiving member,

The outer seal reinforcing member is arranged on the annular groove 33 , extends into the outer mounting groove 10 and abuts against the middle sealing member.

By arranging the inner mounting groove 9, the outer mounting groove 10 and the annular groove 33, the inner sealing groove 9 is provided with an inner seal receiving part, so as to ensure the sealing effect between the inner tight receiving part and the inner mounting groove 9, and the outer mounting groove 10 is provided with an intermediate seal, thereby ensuring the sealing effect between the outer installation groove 10 and the intermediate seal, and the intermediate seal is offset against the inner seal receiver, thereby ensuring the seal between the intermediate seal and the inner seal receiver. The sealing effect is improved to improve the sealing performance between the inner installation groove 9 and the outer installation groove 10; and an outer seal reinforcement is set in the annular groove 33, so as to further ensure the sealing effect, and the outer seal reinforcement is offset by the middle seal , so as to ensure the overall sealing effect of the sealing support.

Embodiment four

Further on the basis of the third embodiment: the inner seal receiving member includes

The lower seal receiving ring 11, the lower seal receiving ring 11 is arranged at the bottom of the inner mounting groove 9 and is offset against the groove bottom of the inner mounting groove 9, and two groups of holes are coaxially arranged on the lower sealing receiving ring 11, each group of hole groups They are all composed of a number of installation holes 12 evenly distributed according to cylinders. The bottom of the installation holes 12 is tapered and passes through the lower seal receiving ring 11.

A wear-resistant rolling ball 13 is provided with a wear-resistant rolling ball 13 in each of the placement holes 12, and the outside of the wear-resistant rolling ball 13 is provided with a ball sleeve 14, and the wear-resistant rolling ball 13 is relatively free from the ball sleeve 14. Rolling, and the bottom of the wear-resistant rolling ball 13 extends out of the bottom of the placement hole 12, and the top of the wear-resistant rolling ball 13 extends out of the port of the placement hole 12,

The upper seal receiving ring 15, the upper seal receiving ring 15 is arranged on the upper end of the lower seal receiving ring 11, and the upper seal receiving ring 15 is offset against the wear-resistant rolling ball 13, and is rotatably connected with the lower seal receiving ring 11 through the wear-resistant rolling ball 13 . Wherein the upper sealing receiving ring 15 and the lower sealing receiving ring 11 are both made of wear-resistant metal materials.

The lower seal receiving ring 11 is in contact with the bottom of the inner installation groove 9, the upper seal receiving ring 15 is in contact with the middle seal, and the upper seal receiving ring 15 and the lower seal receiving ring 11 are supported by wear-resistant rolling balls 13. Bearing function, so as to play a good rotating bearing effect between the connecting sleeve 6 and the collet 3, so as to ensure the sealing effect and avoid wear between the connecting sleeve 6 and the collet 3.

Embodiment five

Further on the basis of Embodiment 4: the cross-sectional width of the upper seal receiving ring 15 is greater than the width of the lower seal receiving ring 11, and downwards The extended limit edge 16, the lower seal receiving ring 11 is stuck between the two limit edges 16,

And on the bottom side of the lower seal receiving ring 11 near the bottom of the inner mounting groove 9, there are a number of coaxially arranged lower seal receiving grooves 17, the lower seal receiving grooves 17 and the hole groups are distributed alternately,

The ball sleeve 14 is made of self-lubricating soft metal material, and the inner end surface of the upper sealing receiving ring 15 is supported by the wear-resistant rolling ball 13 to form a gap with the outer end surface of the lower sealing receiving ring 11 Cooperate;

An upper chute 18 matched with the wear-resistant rolling ball 13 is provided on the side where the upper seal ring and the wear-resistant rolling ball 13 are opposed, and an upper chute 18 matching the wear-resistant rolling ball 13 is provided at the bottom of the inner mounting groove 9 . Cooperating sliding groove 19;

And on the outer end surface of the lower seal receiving ring 11, a lower sealing receiving rib 20 is arranged, and the end of the lower sealing receiving rib 20 is in the shape of a semicircular arc top, and on the upper sealing receiving ring 15 A number of evenly distributed upper seal receiving grooves are arranged on the inner end surface, and an upper seal receiving sleeve 21 that is offset and matched with the lower seal receiving rib 20 is arranged in the upper seal receiving groove, and the upper seal receiving sleeve 21 is formed by Made of polytetrafluoroethylene; and arc-shaped lubricating grooves 22 are respectively arranged on the inner and outer annular surfaces of the upper seal receiving ring 15, and the lubricating grooves 22 are filled with solid lubricants; And a lower sealing ring 23 is arranged in the lower sealing groove 17, and the lower sealing ring 23 is made of vulcanized rubber.

Blocking the lower seal receiving ring 11 by setting the limit edge 16 can prevent the displacement of the lower seal receiving part; and setting the lower seal receiving groove 17 makes the lower seal receiving ring 11 a multi-ring sealing structure, thereby ensuring The sealing effect between the lower sealing receiving ring 11 and the placement groove; setting the ball sleeve 14 of soft metal material can reduce the wear of the wear-resistant rolling ball 13, and the sliding groove 19 is set at the bottom of the placement groove, and the upper sealing receiving ring 15 is set. The upper chute 18, so that the placement groove and the upper seal receiving ring 15 have enough space for the wear-resistant rolling ball 13 to roll, and can reduce the extrusion of the wear-resistant rolling ball 13, thereby reducing the wear of the wear-resistant rolling ball 13 ; and the cooperation between the sealing rib and the upper sealing sleeve 21 can play the effect of sliding seal, and the arc top-shaped end of the lower sealing rib 20 can further reduce the probability of wear, and the polytetrafluoroethylene The upper sealing sleeve 21 can ensure good lubricating performance and sealing performance; and a lubricating groove 22 is provided and solid lubricant is filled in the lubricating groove 22, so that the upper sealing receiving ring can be lowered when the connecting sleeve 6 rotates relative to the collet 3 15 inner ring surface and outer ring surface wear; and the lower seal receiver ring 23 is set in the lower seal receiver groove 17, so as to further ensure the sealing effect between the lower seal receiver ring 11 and the inner installation groove 9.

Embodiment six

Further on the basis of embodiment five: the intermediate seal includes

The lower seal support part 24, the lower seal support part 24 is against the upper seal receiving ring 15,

The upper sealing part, the upper sealing part is located inside the lower sealing support part 24, and the upper sealing part is a V-shaped sealing structure composed of two mutually symmetrical sealing fins 25,

Wherein the two sides of the lower sealing support part 24 are against the outer side walls of the outer installation groove 10, and the two sides of the upper sealing part are against the inner side walls of the outer installation groove 10,

Wherein the two sides of the lower seal support part 24 are respectively formed with seal receiving parts 26, and the said lower seal support part 24 abuts against the outer installation groove 10 through the seal receiving part 26, and the side wall of the seal receiving part 26 and the An arc-shaped connecting portion 27 is provided at the joint of the two ends.

The lower sealing supporting part is offset against the upper sealing receiving ring 15, so as to ensure the sealing effect of the connection between the intermediate seal and the inner sealing receiving part, and the two sides of the lower sealing supporting part 24 form a sealing receiving part 26, and the sealing receiving part 26 against the outer installation groove 10, so as to ensure the sealing effect between the upper sealing part and the outer installation groove 10; Sealing effect with the outer mounting groove 10.

Embodiment seven

On the basis of Embodiment 6, further: the sealing fin 25 is installed outwardly from the bottom of the lower sealing support part 24 to the bottom of the installation groove 10, and the thickness of the sealing fin 25 is installed outward from the lower sealing support part 24 to the groove 10, the direction of the bottom is gradually decreasing, and an arc-shaped sealing top 28 is formed at the tail of the sealing fin 25,

A transition groove with an included angle of 95-105° is formed between the inner sidewalls of the two outwardly inclined sealing fins 25, and the outer sidewalls of the inclined sealing fins 25 and the end surface of the sealing receiving portion 26 An angle of 60-70° is formed between them;

And between the inner sidewalls of the two sealing fins 25, they are connected by an arcuate connecting section 29;

A concave middle groove 30 is formed on the side of the lower seal supporting part 24 close to the upper seal receiving ring 15. The upper seal receiving ring 15 is stuck on the middle groove 30, and the middle groove 30 is provided with Several intermediate sealing grooves are arranged coaxially, and upper sealing receiving ribs 31 matching the intermediate sealing grooves are formed on the upper sealing receiving ring 15 .

The opening angle of the two sealing fins 25 is 95-105°, so that the structural strength of the two sealing fins 25 can be ensured, and an angle of 60-60° is formed between the outer sidewall of the sealing fins 25 and the end surface of the sealing receiving portion 26. The included angle of 70° can ensure the sealing effect between the sealing fin 25 and the inner wall of the outer mounting groove 10; and the cooperation of the set upper sealing rib 31 and the middle sealing groove can further improve the sealing of the inner seal receiving part of the middle seal. Effect.

Embodiment eight

Further on the basis of Embodiment 7: the outer sealing reinforcement includes

The sealing setting ring 32, the sealing setting ring 32 with a cross-section being stuck in the bottom of the annular groove 33, and fixed by a sealing adhesive,

The sealing pressing block 34, the sealing pressing block 34 is arranged in the sealing setting ring 32, and is in an interference fit with the sealing setting ring 32, and the end of the sealing pressing block 34 away from the sealing setting ring 32 is connected with the intermediate seal offset,

Compression bolts 35, the plurality of compression bolts 35 evenly distributed on the circumference are against the end surface of one side of the sealing pressure block 34 located in the sealing installation ring 32 and squeezed with the sealing pressure block 34 through thread engagement,

The sealing receiving piece 36, the sealing receiving piece 36 is made of metal material, is arranged on the end surface of one side of the sealing pressing block 34 located in the sealing setting ring 32 and is fixedly connected with the end surface of the sealing pressing block 34 by an adhesive; and sealed The receiving piece 36 is in clearance fit with the seal setting ring 32 , and the pressing bolt 35 exerts pressure on the sealing pressing block 34 through the sealing receiving piece 36 . The briquetting block is made of plastic alloy as a whole.

By twisting the compression bolt 35, the sealing receiving piece 36 drives the sealing pressing block 34 to move in the sealing setting ring 32, and makes the sealing block abut against the upper sealing part of the intermediate seal; and the metal sealing receiving piece 36 can ensure its The structural strength of itself; and the seal receiving piece 36 and the seal setting ring 32 are clearance fit so as to prevent the wear of the seal setting ring 32; and the seal setting ring 32 is fixed by the sealing adhesive, which ensures the strength and the sealing Effect.

Embodiment nine

Further on the basis of Embodiment 8, threaded holes extending inward and communicating with the annular groove 33 are respectively provided on the outer end surfaces of the upper connecting section 6a and the lower connecting section 6c, and the above-mentioned pressing bolts 35 are threadedly connected to the The threaded hole is inserted into the annular groove 33 through the threaded hole, and the seal setting ring 32 is provided with a through hole corresponding to the threaded hole one by one and communicated with the threaded hole,

Wherein the sealing briquetting block 34 is an annular structure with a rectangular cross section, and a protruding pressure top 37 is formed on the side of the sealing briquetting block 34 close to the intermediate seal, and the cross-sectional profile of the briquetting block is formed on the intermediate seal. The transition groove between the two sealing fins 25 is similar and has an interference fit with the transition groove; the end surface of the seal setting ring 32 is flush with the end surface of the annular groove 33 .

By adopting the above-mentioned technical scheme, the transition groove and the upper sealing part are pressed down as a whole by pressing down the pressure top 37 which is in interference fit with the transition groove, so that the sealing fin 25 is deformed and is in close contact with the inner installation groove 9, thereby further The sealing effect of the connection between the intermediate seal and the inner installation groove 9 is improved; and the end face of the seal setting ring 32 is flush with the end face of the annular groove 33, thereby preventing the seal setting ring 32 from abutting against the intermediate seal, causing the middle Damage to seals.

Embodiment ten

Further on the basis of Embodiment 8: it also includes a peripheral cooling water pump, a cooling water tank, a cooling pipe, a cooling solenoid valve and a control cabinet, the control cabinet is provided with a controller and a control circuit, a cooling water tank, a cooling water pump, and a cooling solenoid valve and the water inlet joint 8 are sequentially connected through the cooling pipe,

And the controller obtains the current speed V of the driving motor 1 from time to time during the finishing process; compares V with the preset speed set, and obtains the magnitude relationship between V and the preset speed; according to the magnitude relationship, Adjust the output power of the cooling water pump, wherein the preset speed includes the upper limit preset speed V2, the middle preset speed V1 and the lower limit maintenance speed V0, V2>V1>V0, and adjust the output of the cooling water pump according to the size relationship power, including:

When V0<V<V1, control the output power of the cooling water pump to P1,

When V2≥V≥V1, the control maintains the output power of the cooling water pump to P2,

When V>V2, control the output power of the cooling water pump to P3;

Wherein the output power P1<P2<P3,

When V<V1, the output power of the cooling water pump is low; when V≥V1, it will enter the cooling mode faster,

When V≤V0, the cooling water pump is controlled to stop running.

For the operation status of the finishing machine head at different speeds, through the cooperation of the output power of the fourth gear speed and the third gear cooling water pump, the heat dissipation performance of the tool 4 can be well ensured, and the waste of resources can be avoided.

The foregoing embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made according to the structures, shapes and principles of the present invention shall be covered by the protection of the present invention. within range.

Claims (10)

1. A production process of a stop valve, the stop valve is processed by an automatic stop valve machine, wherein the automatic stop valve machine includes finishing the valve hole at the upper end of the stop valve, thereby reducing the roughness of the inner surface of the valve hole, and through the set precision The processing head is carried out, and it is characterized in that: the finishing head includes

   The drive motor (1), the drive motor (1) is controlled and driven by an external frequency converter,

   The machine head assembly (2) has a transmission mechanism in the machine head assembly (2), and the transmission machine head is driven by the drive motor (1).

   The collet (3), the collet (3) is arranged on the lower end of the head assembly (2), and is driven to rotate by the head assembly (2), and the end face of the collet (3) is provided with interconnected fixing holes ( 3a) and the receiving hole (3b),

   The tool (4), the tool (4) is fixed on the chuck (3) through the fixing hole (3a), and the tool (4) is provided with a cooling hole (4a), and the cooling hole (4a) communicates with the fixing hole (3a) ,

   The fixed ring (5), the fixed ring (5) is sleeved on the upper end of the cutter (4), the cutter (4) is fixed on the collet (3) through the fixed exchange, and there are several holes on the side wall of the fixed ring (5). The diversion groove (5a), the diversion groove (5a) communicates with the fixing hole (3a).
2. The production process of a shut-off valve according to claim 1, characterized in that: the finishing head also includes

   Connecting sleeve (6), the cross-section of the vertically arranged connecting sleeve (6) is set on the chuck (3), including the upper connecting section (6a), the receiving section (6b) and the lower connecting section (6c ), an arc-shaped buffer groove (7) is formed on a layer of the receiving section (6b) close to the outer wall of the chuck (3),

   A protruding installation edge (3c) is formed in the middle of the chuck (3), and the upper connection section (6a) and the lower connection section (6c) of the connecting sleeve (6) are respectively clamped on the two sides of the installation edge (3c). On the side end face, a number of evenly distributed water inlet holes (3d) are arranged on the side wall of the mounting edge (3c) of the chuck (3), and on the receiving section (6b) of the connecting sleeve (6) A water inlet hole (6d) is provided, and the water inlet hole (6d) is connected to the buffer tank (7), and a water inlet joint (8) is arranged on the water inlet hole (6d); and the upper connecting section (6a) and the A sealing support is provided between the upper end surface of the installation edge (3c) and the lower connection section (6c) and the lower end surface of the installation edge (3c).
3. The production process of a shut-off valve according to claim 2, characterized in that: inner mounting grooves (9) are provided on both side faces of the mounting edge (3c), and the upper connecting section (6a) and The inner side of the lower connection section (6c) is provided with an outer installation groove (10), and the sealing support is arranged between the inner installation groove (9) and the outer installation groove (10); the inner side of the outer installation groove (10) is provided with an annular Groove (33), the section width of annular groove (33) is less than the section width of outer installation groove (10),

   The seal support includes

   The inner seal acceptor, the inner seal acceptor is set on the inner installation groove (9),

   The intermediate seal, the intermediate seal is arranged on the outer installation groove (10) and extends like the inner installation groove (9) and abuts against the lower inner seal receiving member,

   The outer sealing reinforcement is arranged on the annular groove (33), extends into the outer mounting groove (10) and abuts against the middle sealing member.
4. The production process of a shut-off valve according to claim 3, characterized in that: the inner seal receiving member includes

   The lower seal receiving ring (11), the lower seal receiving ring (11) is set at the bottom of the inner installation groove (9) and is against the groove bottom of the inner installation groove (9), and is arranged coaxially on the lower seal receiving ring (11) There are two groups of hole groups, each group of hole groups is composed of a number of installation holes (12) evenly distributed according to cylinders, the bottom of the installation holes (12) is tapered and passes through the lower sealing ring (11),

   A wear-resistant rolling ball (13), each of the placement holes (12) is provided with a wear-resistant rolling ball (13), and the outside of the wear-resistant rolling ball (13) is provided with a ball sleeve (14). The grinding roller ball is free to roll relative to the ball sleeve (14), and the bottom of the wear-resistant roller ball (13) extends out of the bottom of the placement hole (12), and the top of the wear-resistant roller ball (13) extends out of the placement hole (12). port,

   The upper seal receiving ring (15), the upper sealing receiving ring (15) is arranged on the upper end of the lower sealing receiving ring (11), and the upper sealing receiving ring (15) is offset against the wear-resistant rolling ball (13), and through the wear-resistant rolling ball It is rotatably connected with the lower seal receiving ring (11).
5. The production process of a globe valve according to claim 4, characterized in that: the section width of the upper sealing receiving ring (15) is greater than the width of the lower sealing receiving ring (11), and the upper sealing receiving ring ( 15) On both sides of one end of the lower sealing receiving ring (11), there are downwardly extending limiting edges (16), and the lower sealing receiving ring (11) is stuck between the two limiting edges (16),

   And on the side of the bottom of the lower sealing receiving ring (11) near the inner installation groove (9), there are several lower sealing receiving grooves (17) arranged coaxially, and the lower sealing receiving grooves (17) Alternately distributed with hole groups,

   The ball sleeve (14) is made of self-lubricating soft metal material, and the inner end surface of the upper seal receiving ring (15) is supported by the wear-resistant rolling ball (13) and the lower seal receiving ring (11) The outer end surface is a clearance fit;

   The upper chute (18) matched with the wear-resistant rolling ball is provided on the side where the upper sealing ring and the wear-resistant rolling ball (13) are opposed, and the bottom of the inner mounting groove (9) is provided with a wear-resistant rolling groove (18). Grinding the sliding groove (19) that the rolling ball (13) matches;

   And on the outer end surface of the lower seal receiving ring (11) is provided with a lower seal receiving rib (20), the end of the lower seal receiving rib (20) is in the shape of a semicircular arc top, and on the upper The inner end surface of the seal receiving ring (15) is provided with a number of evenly distributed upper seal receiving grooves, and an upper seal receiving sleeve (21 ), and the upper sealing sleeve (21) is made of polytetrafluoroethylene; and an arc-shaped lubricating groove is respectively arranged on the inner ring surface and the outer ring surface of the upper sealing ring (15) (22), the described lubricating groove (22) is filled with a solid lubricant.
6. The production process of a shut-off valve according to claim 5, characterized in that: the intermediate seal includes

   The lower seal support part (24), the lower seal support part (24) is against the upper seal receiving ring (15),

   The upper sealing part, the upper sealing part is located inside the lower sealing support part (24), and the upper sealing part is a V-shaped sealing structure composed of two mutually symmetrical sealing fins (25),

   The two sides of the lower sealing support part (24) are against the outer side walls of the outer installation groove (10), and the two sides of the upper sealing part are in contact with the inner sides of the outer installation groove (10). against the wall,

   Wherein the two sides of the lower seal support part (24) are respectively formed with seal receiving parts (26), and the said lower seal support part (24) is offset against the outer mounting groove (10) through the seal receiving part (26), And an arc-shaped connecting portion (27) is arranged on the connection between the side wall of the sealing receiving portion (26) and the two ends.
7. The production process of a shut-off valve according to claim 6, characterized in that: the sealing fin (25) is set outwardly from the bottom of the bottom sealing support portion (24) of the mounting groove (10), and is inclined outwards, And the thickness of the sealing fin (25) decreases gradually from the lower sealing support portion (24) toward the bottom of the outer mounting groove (10), and an arc-shaped sealing top (28) is formed at the tail of the sealing fin (25),

   A transition groove with an included angle of 95-105° is formed between the inner sidewalls of the two outwardly inclined sealing fins (25), and the outer sidewalls of the inclined sealing fins (25) are in contact with the sealing joints. An included angle of 60-70° is formed between the end faces of the portion (26);

   And the inner side walls of the two sealing fins (25) are connected by an arc connecting section (29);

   A concave middle groove (30) is formed on the side of the lower seal supporting part (24) close to the upper seal receiving ring (15), and the upper seal receiving ring (15) is stuck on the middle groove (30) , and the middle groove portion (30) is provided with a number of coaxial intermediate seal grooves, and an upper seal receiving rib (31) matching the middle seal groove is formed on the upper seal receiving ring (15).
8. The production process of a shut-off valve according to claim 7, characterized in that: the outer sealing reinforcement includes

   The seal placement ring (32), the cross-section is the seal placement ring (32) that is stuck in the bottom of the annular groove (33), and is fixed by the sealing adhesive,

   Sealing briquetting (34), described sealing briquetting (34) is arranged in the sealing setting ring (32), and is interference fit with sealing setting ring (32), and described sealing briquetting (34) is away from One end of the seal setting ring (32) is against the middle seal,

   Compression bolts (35), the number of compression bolts (35) evenly distributed on the circumference are against the end face of one side of the sealing pressure block (34) located in the sealing installation ring (32) and are engaged with the sealing by thread engagement. The briquetting block (34) is extruded,

   The sealing receiving piece (36), the sealing receiving piece (36) is made of metal material, is arranged on the side end surface of the sealing pressing block (34) located in the sealing setting ring, and is connected with the sealing pressing block (34) by the adhesive The end faces are fixedly connected, and the seal receiving piece (36) is in clearance fit with the seal placement ring (32), and the compression bolt (35) exerts pressure on the sealing briquetting block (34) through the seal receiving piece (36).
9. The production process of a shut-off valve according to claim 8, characterized in that: on the outer end surfaces of the upper connecting section (6a) and the lower connecting section (6c), there are respectively provided with annular grooves (33 ) connected threaded holes, the said hold-down bolts (35) are threadedly connected to the threaded holes and inserted into the annular groove (33) through the threaded holes, and the seal arrangement ring (32) is provided with one-to-one correspondence with the threaded holes and the through hole communicating with the threaded hole,

   Wherein said sealing briquetting block (34) is the annular structure that cross section is rectangular, forms the protruding pressing top (37) on the side of sealing briquetting block (34) close to the intermediate seal member, and the cross-sectional profile of said briquetting block It is similar to the transition groove formed between the two sealing fins (25) on the intermediate seal and is interference fit with the transition groove; the end face of the seal setting ring (32) is flush with the end face of the annular groove (33).
10. The production process of a shut-off valve according to claim 9 is characterized in that: the automatic shut-off valve machine also includes a cooling water pump, a cooling water tank, a cooling pipe, a cooling solenoid valve and a control cabinet, and a controller and a control cabinet are arranged in the control cabinet. The circuit, the cooling water tank, the cooling water pump, the cooling solenoid valve and the water inlet joint (8) are sequentially connected through the cooling pipe,

    And the controller obtains the current speed V of the drive motor (1) from time to time in the finishing process; compares V with the preset speed set, and obtains the magnitude relationship between V and the preset speed; according to the size Relationship, adjust the output power of the cooling water pump, wherein the preset speed includes the upper limit preset speed V2, the middle preset speed V1 and the lower limit maintenance speed V0, V2>V1>V0, according to the size relationship, adjust the cooling water pump output power, including:

    When V0<V<V1, control the output power of the cooling water pump to P1,

    When V2≥V≥V1, the control maintains the output power of the cooling water pump to P2,

    When V>V2, control the output power of the cooling water pump to P3;

    Wherein the output power P1<P2<P3,

    When V<V1, the output power of the cooling water pump is low; when V≥V1, it will enter the cooling mode faster,

    When V≤V0, the cooling water pump is controlled to stop running.

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