Split type fluorine lining device for ball valve

Abstract

The application discloses a split type fluorine lining device of a ball valve, which comprises an upper die, a lower die and a positioning core shaft, the upper die is detachably arranged at the upper end of the lower die through bolts, the positioning core shaft is fixedly arranged on the lower die, a steel valve body is sleeved on the positioning core shaft, and cavities matched with the steel valve body are formed in the upper die and the lower die; a second positioning pin matched with the bottom end of the steel valve body is arranged at the bottom end of the lower die, the second positioning pin is slidably arranged in the sliding groove of the lower die, a first positioning pin matched with the side wall of the steel valve body is arranged on the side wall of the lower die, and the first positioning pin is slidably arranged in the sliding groove of the lower die. The split type fluorine lining device of the ball valve is ingenious in design, practical in function, and can effectively solve the problems of time-consuming and laborious operation, high cost and low yield of the existing split type fluorine lining device of the ball valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ball valve processing equipment, in particular to a split type fluorine lining device for ball valve. BACKGROUND

[0002] The fluorine lining ball valve is a valve with a round hole ball as the opening and closing part, which rotates around the center line of the valve body to realize the opening and closing of the valve. The special molding process makes the sealing surface dense and good, and the V-shaped PTFE packing combination makes the valve achieve zero leakage; the ball and the valve rod are cast as one, which eliminates the possibility of the valve rod being forced out of the pressure-bearing part due to pressure changes, and fundamentally ensures the safety in use; the full plastic lining process is adopted, which is resistant to strong corrosion of medium. The traditional fluorine lining ball valve adopts an integrated switch rod and ball, which is forced under the action of the medium impacting the ball, and the switch rod and the ball are also forced, causing wear of the surrounding packing and reducing the service life. The ball and the valve rod of the split type ball valve (rodless ball valve) are separated, which has the advantages of simplifying the welding process and better ensuring the machining precision of the ball, but has the problem of difficult fluorine lining process.

[0003] In the prior art, four supporting bolts are arranged on the fluorine lining mold to ensure the suspension of the ball, so as to realize the full plastic package of the ball in the injection molding process. However, in actual operation, the position of the steel ball will deviate during the process of withdrawing the bolts one by one, resulting in uneven fluorine lining on the surface of the ball, which cannot meet the use requirements. The existing solution is to increase the injection thickness and increase the subsequent turning amount to ensure the roundness of the ball, but this scheme is time-consuming and laborious, and the cost is high. Therefore, how to develop a new type of split type fluorine lining device for ball valve becomes a problem to be solved by the technical personnel in the field. SUMMARY

[0004] The purpose of the present application is to provide a split type fluorine lining device for ball valve, which solves the problems of time-consuming, laborious, high cost and low yield of the existing split type fluorine lining device for ball valve.

[0005] To solve the above technical problems, the present application adopts the following technical scheme:

[0006] The present application provides a split type fluorine lining device for ball valve, which comprises an upper mold, a lower mold and a positioning mandrel, the upper mold is detachably arranged at the upper end of the lower mold through bolts, the positioning mandrel is fixedly arranged on the lower mold, a steel valve body is sleeved on the positioning mandrel, and cavities matched with the steel valve body are formed in the upper mold and the lower mold; a second positioning pin matched with the bottom end of the steel valve body is arranged at the bottom end of the lower mold, the second positioning pin is slidably arranged in the sliding groove of the lower mold, a first positioning pin matched with the side wall of the steel valve body is arranged on the side wall of the lower mold, and the first positioning pin is slidably arranged in the sliding groove of the lower mold.

[0007] Further, a positioning core block matched with the square hole on the side wall of the steel valve body is slidably arranged in the opening slot of the lower mold.

[0008] Further, an inclined ejector rod matched with the through hole on the positioning core block is arranged on the side wall of the upper mold.

[0009] Further, the number of the first positioning pins is three, and the number of the second positioning pins is three.

[0010] Further, a limiting slot matched with one of the second positioning pins is arranged at the bottom end of the steel valve body.

[0011] Further, the lower mold is fixedly arranged on the base, and a rotating disc is rotatably arranged between the lower mold and the base, a first driving sliding slot is arranged on the upper surface of the rotating disc, the first positioning pins are matched with the first driving sliding slot through first guide rollers, and a second driving sliding slot is arranged on the side wall of the rotating disc, the second positioning pins are matched with the second driving sliding slot through second guide rollers.

[0012] Further, the bottom end of the rotating disc is rotatably arranged on the base through a sliding rail, and a rotating handle is arranged on the side wall of the rotating disc.

[0013] Further, a feeding opening is arranged at the top end of the upper mold, and the feeding opening is matched with a pressure injection rod.

[0014] Further, a convex ring matched with the groove on the upper surface of the lower mold is arranged on the lower surface of the upper mold.

[0015] A split type fluorine-lined ball valve method comprises the following steps:

[0016] Step one, the steel valve body is sleeved on the positioning core shaft of the lower mold, the lower end surface of the steel valve body is in contact with the second positioning pin, and the side wall of the steel valve body is in contact with the first positioning pin;

[0017] Step two, the limiting slot on the lower end surface of the steel valve body is matched with the corresponding second positioning pin, so that the square hole on the side wall of the steel valve body can be matched with the positioning core block;

[0018] Step three, the upper mold is pressed on the lower mold and fixed by bolts, and the upper mold is in contact with the positioning core block through the inclined ejector rod during the descending process.

[0019] Step four, the solid powder FEP material is put into the mold through the feeding opening, and the mold is heated as a whole.

[0020] Step five, the heated mold is placed below the pressure injection rod, and the pressure injection rod is pressure injected through the feeding opening.

[0021] Step six, after waiting for the FEP material to preliminarily solidify, the rotating handle is rotated to drive the rotating disc to rotate, the rotating disc drives the first positioning pin to translate outward through the first driving sliding groove and the first guide roller, and the rotating disc drives the second positioning pin to move downward through the second driving sliding groove and the second guide roller, and the liquid FEP material fills the cavities after the displacement of the first positioning pin and the second positioning pin under the action of the injection rod;

[0022] Step seven, after waiting for the FEP material to completely cool, the upper mold is removed, and the rotating disc is reversely rotated to realize the demolding of the primary product of the ball valve.

[0023] Compared with the prior art, the beneficial technical effects of the present application are:

[0024] The split ball valve fluorine lining device realizes reasonable positioning of the steel valve body through the three first positioning pins and the three second positioning pins, guarantees the suspension of the steel valve body, and guarantees the uniformity of the FEP material on the surface of the steel valve body by using the positioning elements for subsequent pushing and disengagement; the split ball valve fluorine lining device integrates the operations of the first positioning pins and the second positioning pins on the rotating handle, the tooling realizes six-point simultaneous positioning and exit motion through the first driving sliding groove and the second driving sliding groove on the rotating disc through one rotating handle, and product deformation is avoided. In general, the split ball valve fluorine lining device is ingenious in design, practical in function, and effectively solves the problems of time-consuming and laborious, high cost, and low yield of the existing split ball valve fluorine lining device. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below in conjunction with the drawings:

[0026] Figure 1 It is a cooperation drawing of the upper mold and the lower mold of the split ball valve fluorine lining device of the present application;

[0027] Figure 2 It is a sectional view of the split ball valve fluorine lining device of the present application;

[0028] Figure 3 It is an axonometric view of the rotating disc (without the steel valve body);

[0029] Figure 4 It is an axonometric view of the rotating disc (with the steel valve body);

[0030] Figure 5 It is Figure 4 a front view;

[0031] Figure 6 It is a cooperation drawing of the first positioning pin and the first guide roller;

[0032] Figure 7 It is a cooperation drawing of the second positioning pin and the second guide roller;

[0033] Figure 8It is the whole structure schematic diagram of lower mould;

[0034] Figure 9 It is the front view of ball valve primary finished product;

[0035] Figure 10 It is Figure 9 Sectional view;

[0036] Figure 11 It is the structure schematic diagram of steel valve body;

[0037] Figure 12 It is the sectional view of ball valve final finished product.

[0038] Mark explanation:1, steel valve body;2, upper mould;201, feeding port;202, inclined jacks;3, lower mould;301, first positioning pin;302, second positioning pin;303, positioning core block;304, rotating disc;305, first drive sliding slot;306, rotating handle;307, second drive sliding slot;308, sliding rail;309, first guide roller;310, second guide roller;4, positioning core shaft;5, injection rod;6, base. Specific implementation

[0039] As Figures 1 to 12 The split type ball valve fluorine lining device includes upper mould 2, lower mould 3 and positioning core shaft 4.

[0040] The upper mould 2 is detachably arranged on the upper end of the lower mould 3 through bolts, and the lower surface of the upper mould 2 is provided with a convex ring matched with the groove on the upper surface of the lower mould 3. The top end of the upper mould 2 is provided with a feeding port 201 matched with the injection rod 5.

[0041] The positioning core shaft 4 is fixedly arranged on the lower mould 3. When processing, the steel valve body 1 needs to be sleeved on the positioning core shaft 4, and the upper mould 2 and the lower mould 3 are provided with cavities matched with the steel valve body 1.

[0042] The bottom end of the lower mould 3 is provided with a second positioning pin 302 matched with the bottom end of the steel valve body 1, the number of the second positioning pin 302 is three, the second positioning pin 302 is slidably arranged in the sliding slot of the lower mould 3, and the sidewall of the lower mould 3 is provided with a first positioning pin 301 matched with the sidewall of the steel valve body 1, the number of the first positioning pin 301 is three, and the first positioning pin 301 is slidably arranged in the sliding slot of the lower mould 3.

[0043] The opening slot of the lower mold 3 is slidably provided with a positioning core block 303 matched with the square hole on the side wall of the steel valve body 1. The side wall of the upper mold 2 is provided with an inclined ejector rod 202 matched with the through hole on the positioning core block 303.

[0044] The bottom end of the steel valve body 1 is provided with a limiting slot matched with one of the second positioning pins 302. The limiting slot can prevent the steel valve body 1 from rotating during the injection process. The limiting slot is filled with FEP material during the injection process, which does not affect the sealing effect.

[0045] The lower mold 3 is fixedly arranged on the base 6, and the lower mold 3 and the base 6 are rotatably provided with a turntable 304. The upper surface of the turntable 304 is provided with a first driving sliding groove 305, and the first positioning pin 301 is matched with the first driving sliding groove 305 through a first guide roller 309. The side wall of the turntable 304 is provided with a second driving sliding groove 307, and the second positioning pin 302 is matched with the second driving sliding groove 307 through a second guide roller 310. The second driving sliding groove 307 and the first driving sliding groove 305 are both variable-diameter curves, which can realize self-locking of the first positioning pin 301 and the second positioning pin 302.

[0046] The bottom end of the turntable 304 is rotatably arranged on the base 6 through a sliding rail 308, and the side wall of the turntable 304 is provided with a rotating handle 306.

[0047] A split type fluorine-lined ball valve method, comprising the following steps:

[0048] Step one, the steel valve body 1 is sleeved on the positioning core shaft 4 of the lower mold 3, the lower end surface of the steel valve body 1 is in contact with the second positioning pin 302, and the side wall of the steel valve body 1 is in contact with the first positioning pin 301;

[0049] Step two, the limiting slot on the lower end surface of the steel valve body 1 is matched with the corresponding second positioning pin 302, so that the square hole on the side wall of the steel valve body 1 can be matched with the positioning core block 303;

[0050] Step three, the upper mold 2 is pressed on the lower mold 3 and fixed by bolts, and the positioning core block 303 is tightly pressed by the inclined ejector rod 202 during the descending process of the upper mold 2;

[0051] Step four, the solid powder FEP material is put into the mold through the feeding port 201, and the whole mold is heated;

[0052] Step five, the heated mold is placed below the injection rod 5, and the injection rod 5 is injected through the feeding port 201;

[0053] Step six, after waiting for the FEP material to preliminarily solidify, the rotating handle 306 is rotated to drive the rotating disc 304 to rotate, the rotating disc 304 drives the first positioning pin 301 to translate outward through the first driving sliding slot 305 and the first guide roller 309, and the rotating disc 304 drives the second positioning pin 302 to move downward through the second driving sliding slot 307 and the second guide roller 310, and the liquid FEP material fills the cavities after the displacement of the first positioning pin 301 and the second positioning pin 302 under the action of the injection rod 5;

[0054] Step seven, after waiting for the FEP material to completely cool down, the upper mold 2 is removed, and the rotating disc 304 is reversely rotated to realize the demolding of the primary finished product of the ball valve.

[0055] Step eight, the excess part in the primary finished product of the ball valve is removed through a lathe, so that the final finished product of the ball valve is obtained.

[0056] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope defined by the claims of the present application.

Claims

1. A split-type ball valve fluoropolymer-lined device, characterized in that: The system includes an upper mold (2), a lower mold (3), and a positioning mandrel (4). The upper mold (2) is detachably mounted on the upper end of the lower mold (3) by bolts. The positioning mandrel (4) is fixedly mounted on the lower mold (3). A steel valve body (1) is sleeved on the positioning mandrel (4). The upper mold (2) and the lower mold (3) have cavities that cooperate with the steel valve body (1). The bottom end of the lower mold (3) is provided with a second positioning pin (302) that cooperates with the bottom end of the steel valve body (1). The second positioning pin (302) is slidably mounted in the groove of the lower mold (3). The side wall of the lower mold (3) is provided with a first positioning pin (301) that cooperates with the side wall of the steel valve body (1). The first positioning pin (301) is slidably mounted in the groove of the lower mold (3). The lower mold (3) is placed in the groove of the lower mold (3); the lower mold (3) is fixedly set on the base (6), and a turntable (304) is rotatably set between the lower mold (3) and the base (6). A first drive groove (305) is opened on the upper surface of the turntable (304), and the first positioning pin (301) cooperates with the first drive groove (305) through the first guide roller (309). A second drive groove (307) is opened on the side wall of the turntable (304), and the second positioning pin (302) cooperates with the second drive groove (307) through the second guide roller (310). The bottom end of the turntable (304) is rotatably set on the base (6) through the slide rail (308). A rotating handle (306) is provided on the side wall of the turntable (304).

2. The fluoropolymer-lined split-type ball valve device according to claim 1, characterized in that: The lower mold (3) has a slidable positioning core block (303) that mates with a square hole on the side wall of the steel valve body (1) in the opening groove.

3. The fluoropolymer-lined split-type ball valve device according to claim 2, characterized in that: The upper mold (2) is provided with a slanted push rod (202) on its side wall that engages with the through hole on the positioning core block (303).

4. The fluoropolymer-lined split-type ball valve device according to claim 1, characterized in that: The number of the first positioning pins (301) is three; the number of the second positioning pins (302) is three.

5. The fluoropolymer-lined split-type ball valve device according to claim 4, characterized in that: The bottom end of the steel valve body (1) is provided with a limiting groove that cooperates with one of the second positioning pins (302).

6. The fluoropolymer-lined split-type ball valve device according to claim 1, characterized in that: The top of the upper mold (2) is provided with a feeding port (201), which is in conjunction with the injection rod (5).

7. The fluoropolymer-lined split-type ball valve device according to claim 1, characterized in that: The lower surface of the upper mold (2) is provided with a protruding ring that engages with the groove on the upper surface of the lower mold (3).

8. A method for lining a split-type ball valve with fluorine, comprising the fluorine-lined device for a split-type ball valve as described in any one of claims 1-7, characterized in that... Includes the following steps: Step 1: Place the steel valve body (1) on the positioning mandrel (4) of the lower mold (3). The lower end face of the steel valve body (1) contacts the second positioning pin (302), and the side wall of the steel valve body (1) contacts the first positioning pin (301). Step 2: The limiting groove on the lower end face of the steel valve body (1) is matched with the corresponding second positioning pin (302) so that the square hole on the side wall of the steel valve body (1) can match the positioning core block (303); Step 3: Press the upper mold (2) onto the lower mold (3) and fix it with bolts. During the descent, the upper mold (2) presses against the positioning core block (303) with the inclined push rod (202). Step 4: Place the solid powdered FEP material into the mold through the feeding port (201) and heat the entire mold. Step 5: Place the heated mold under the injection rod (5), and the injection rod (5) injects through the feeding port (201); Step 6: After the FEP material has initially solidified, drive the turntable (304) to rotate by turning the handle (306). The turntable (304) drives the first positioning pin (301) to move outward through the first drive groove (305) and the first guide roller (309). The turntable (304) drives the second positioning pin (302) to move downward through the second drive groove (307) and the second guide roller (310). The liquid FEP material fills the cavity after the displacement of the first positioning pin (301) and the second positioning pin (302) under the action of the injection rod (5). Step 7: After the FEP material has completely cooled, remove the upper mold (2) and then rotate the turntable (304) in the opposite direction to demold the primary ball valve product.

Images