Split type ball valve fluorine lining device

Abstract

The split type ball valve fluorine lining device comprises an upper die, a lower die and a positioning mandrel, the upper die is detachably arranged at the upper end of the lower die through a bolt, the positioning mandrel is fixedly arranged on the lower die, a steel valve body is arranged on the positioning mandrel in a sleeving mode, and the steel valve body is arranged on the positioning mandrel in a sleeving mode. 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 die, the second positioning pin is arranged in a sliding groove of the lower die in an up-down sliding mode, and a first positioning pin matched with the side wall of the steel valve body is arranged on the side wall of the lower die; the first positioning pin is arranged in the sliding groove of the lower die in a left-right sliding mode. The split type ball valve fluorine lining device is ingenious in design and practical in function, and the problems that an existing split type ball valve fluorine lining device wastes time and labor and is high in cost and low in yield are effectively solved.

Description

Technical Field

[0001] The invention relates to the field of ball valve processing equipment, in particular to a split-type ball valve fluorine lining device. Background Art

[0002] The fluorine-lined ball valve uses a ball with a circular through hole as the opening and closing part. The ball rotates with the valve stem around the center line of the valve body to open and close the valve. The special molding process is used to make the sealing surface dense and good, and the V-type PTFE packing combination makes the valve achieve zero leakage; the ball and the valve stem are cast as one, eliminating the possibility of the valve stem rushing out of the pressure-bearing part due to pressure changes, fundamentally ensuring safety during use; the full plastic lining process is used to resist strong corrosion from the medium. Traditional fluorine-lined ball valves all use a switch rod and a ball as one. Under the impact force of the medium on the ball, because the operating switch rod is connected to the ball as a whole, it is also stressed at the same time, causing wear of the surrounding packing and reducing its service life. The ball and the valve stem of the split ball valve (stemless ball valve) are separated. The advantage is that it can simplify the welding process and better ensure the ball processing accuracy, but there is a problem of difficulty in the fluorine-lined process.

[0003] In the prior art, four supporting bolts are provided on the fluorine-lined mold to ensure the suspension of the sphere, thereby achieving full plastic encapsulation of the sphere in the injection molding process. However, in actual operation, the position of the steel sphere will shift in the process of withdrawing the bolts one by one, resulting in uneven fluorine lining on the surface of the sphere, which does not 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 sphere, but this solution is time-consuming, labor-intensive and costly. Therefore, how to develop a new type of split ball valve fluorine-lined device has become a problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a split ball valve fluorine lining device to solve the problems of the existing split ball valve fluorine lining device being time-consuming, labor-intensive, high cost and low yield.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention discloses a split-type ball valve fluorine-lined device, comprising an upper mold, a lower mold and a positioning core shaft, wherein the upper mold is detachably arranged on the upper end of the lower mold by bolts, the positioning core shaft is fixedly arranged on the lower mold, and a steel valve body is sleeved on the positioning core shaft, and cavities cooperating with the steel valve body are provided in the upper mold and the lower mold; a second positioning pin cooperating with the bottom end of the steel valve body is provided at the bottom end of the lower mold, and the second positioning pin can be slidably arranged in a slide groove of the lower mold up and down, and a first positioning pin cooperating with the side wall of the steel valve body is provided on the side wall of the lower mold, and the first positioning pin can be slidably arranged in the slide groove of the lower mold left and right.

[0007] Furthermore, a positioning core block which cooperates with the square hole on the side wall of the steel valve body is slidably arranged in the opening groove of the lower mold.

[0008] Furthermore, a slanted ejector rod cooperating with a through hole on the positioning core block is provided on the side wall of the upper mold.

[0009] Furthermore, the number of the first positioning pins is three; the number of the second positioning pins is three.

[0010] Furthermore, a limiting groove cooperating with one of the second positioning pins is formed at the bottom end of the steel valve body.

[0011] Furthermore, the lower mold is fixed on the base, and a turntable is rotatably arranged between the lower mold and the base, a first driving groove is opened on the upper surface of the turntable, and the first positioning pin cooperates with the first driving groove through a first guide roller, and a second driving groove is opened on the side wall of the turntable, and the second positioning pin cooperates with the second driving groove through a second guide roller.

[0012] Furthermore, the bottom end of the turntable is rotatably arranged on the base via a slide rail; and a rotating handle is arranged on the side wall of the turntable.

[0013] Furthermore, a feeding port is provided at the top end of the upper mold, and the feeding port cooperates with the injection rod.

[0014] Furthermore, a convex ring is provided on the lower surface of the upper mold to cooperate with the groove on the upper surface of the lower mold.

[0015] A method for lining a split ball valve with fluorine comprises the following steps:

[0016] Step 1: sleeve the steel valve body on the positioning core shaft of the lower mold, the lower end surface of the steel valve body contacts the second positioning pin, and the side wall of the steel valve body contacts the first positioning pin;

[0017] Step 2: Match the limiting groove on the lower end surface of the steel valve body with the corresponding second positioning pin, so that the square hole on the side wall of the steel valve body can match with the positioning core block;

[0018] Step 3, pressing the upper mold onto the lower mold and fixing it with bolts, and the upper mold is pressed and positioned with the inclined ejector rod during the descent process;

[0019] Step 4: Put the solid powdered FEP material into the mold through the feeding port, and heat the entire mold;

[0020] Step 5, placing the heated mold under the injection rod, and the injection rod performs injection through the feeding port;

[0021] Step 6: After the FEP material is initially solidified, the handle is turned to drive the turntable to rotate. The turntable drives the first positioning pin to translate outward through the first driving chute and the first guide roller. The turntable drives the second positioning pin to move downward through the second driving chute and the second guide roller. The liquid FEP material fills the cavity after the displacement of the first positioning pin and the second positioning pin under the action of the injection rod.

[0022] Step 7: After the FEP material is completely cooled, remove the upper mold and rotate the turntable in the opposite direction to demold the primary finished ball valve.

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

[0024] The split ball valve fluorine lining device of the present invention realizes reasonable positioning of the steel valve body through three first positioning pins and three second positioning pins, ensures the suspension of the steel valve body, and uses the positioning element for subsequent ejection and disengagement to ensure the uniformity of the FEP material on the surface of the steel valve body; the split ball valve fluorine lining device of the present invention integrates the operation of the first positioning pin and the second positioning pin into a rotating handle, and the tooling realizes six-point simultaneous positioning and exit movement through a rotating handle and the first driving slide groove and the second driving slide groove on the turntable, thereby avoiding product deformation. In general, the split ball valve fluorine lining device of the present invention has a clever design and practical functions, and effectively solves the problems of the existing split ball valve fluorine lining device being time-consuming and labor-intensive, high cost, and low yield. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 1 This is a diagram showing the matching of the upper mold and the lower mold of the split ball valve fluorine lining device of the present invention;

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

[0028] Figure 3 This is the axonometric view of the turntable (excluding the steel valve body);

[0029] Figure 4 This is the axonometric drawing of the turntable (including the steel valve body);

[0030] Figure 5 for Figure 4 A front view of

[0031] Figure 6 This is a diagram showing the cooperation between the first positioning pin and the first guide roller;

[0032] Figure 7 is a diagram showing the cooperation between the second positioning pin and the second guide roller;

[0033] Figure 8Schematic diagram of the overall structure of the lower mold;

[0034] Fig. 9 This is the front view of the primary finished ball valve;

[0035] Fig.10 for Fig. 9 Cross-sectional diagram of

[0036] Fig.11 It is a schematic diagram of the steel valve body structure;

[0037] Fig.12 This is a cross-sectional view of the final ball valve.

[0038] Explanation of the reference numerals in the accompanying drawings: 1. Steel valve body; 2. Upper mold; 201. Feeding port; 202. Bevel ejector rod; 3. Lower mold; 301. First positioning pin; 302. Second positioning pin; 303. Positioning core block; 304. Turntable; 305. First drive slide; 306. Rotating handle; 307. Second drive slide; 308. Slide rail; 309. First guide roller; 310. Second guide roller; 4. Positioning mandrel; 5. Injection rod; 6. Base. DETAILED DESCRIPTION

[0039] like Figures 1 to 12 As shown, a split ball valve fluorine lining device includes an upper mold 2, a lower mold 3 and a positioning core shaft 4.

[0040] The upper mold 2 is detachably arranged on the upper end of the lower mold 3 by bolts, and a convex ring is arranged on the lower surface of the upper mold 2 to cooperate with the groove on the upper surface of the lower mold 3. A feeding port 201 is arranged at the top of the upper mold 2, and the feeding port 201 cooperates with the injection rod 5.

[0041] The positioning mandrel 4 is fixedly arranged on the lower mold 3. During processing, the steel valve body 1 needs to be sleeved on the positioning mandrel 4, and a cavity matching with the steel valve body 1 is opened in the upper mold 2 and the lower mold 3.

[0042] 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 number of the second positioning pins 302 is three. The second positioning pins 302 can be slid up and down in the slide 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 number of the first positioning pins 301 is three. The first positioning pins 301 can be slid left and right in the slide groove of the lower mold 3.

[0043] A positioning core block 303 is slidably arranged in the opening groove of the lower mold 3 and matches with the square hole on the side wall of the steel valve body 1. An inclined ejector rod 202 is arranged on the side wall of the upper mold 2 and matches 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 groove that cooperates with one of the second positioning pins 302. The positioning groove can prevent the steel valve body 1 from rotating during the injection molding process. In addition, the positioning groove will be filled with FEP material during the injection molding process, which will not affect the sealing effect.

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

[0046] The bottom end of the turntable 304 is rotatably disposed on the base 6 via a slide rail 308 ; a rotating handle 306 is disposed on the side wall of the turntable 304 .

[0047] A method for lining a split ball valve with fluorine comprises the following steps:

[0048] Step 1: sleeve the steel valve body 1 onto the positioning mandrel 4 of the lower mold 3, so that the lower end surface 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;

[0049] Step 2: Match the limiting groove on the lower end surface of the steel valve body 1 with the corresponding second positioning pin 302, so that the square hole on the side wall of the steel valve body 1 can match with the positioning core block 303;

[0050] Step 3: The upper mold 2 is pressed onto the lower mold 3 and fixed by bolts. The upper mold 2 is pressed against the positioning core block 303 by the inclined ejector rod 202 during the descending process.

[0051] Step 4: Put the solid powdered FEP material into the mold through the feeding port 201, and heat the entire mold;

[0052] Step 5, placing the heated mold under the injection rod 5, and the injection rod 5 performs injection through the feeding port 201;

[0053] Step 6: After the FEP material is initially solidified, the handle 306 is turned to drive the turntable 304 to rotate, and the turntable 304 drives the first positioning pin 301 to translate outward through the first driving chute 305 and the first guide roller 309. The turntable 304 drives the second positioning pin 302 to move downward through the second driving chute 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;

[0054] Step seven, after the FEP material is completely cooled, the upper mold 2 is removed and the turntable 304 is rotated in the opposite direction to demould the primary finished ball valve product.

[0055] Step eight, removing the excess part of the primary finished ball valve by lathe to obtain the final finished ball valve.

[0056] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A split ball valve fluorine lining device, characterized in that: The invention comprises an upper mould (2), a lower mould (3) and a positioning mandrel (4); the upper mould (2) is detachably arranged on the upper end of the lower mould (3) by means of bolts; the positioning mandrel (4) is fixedly arranged on the lower mould (3); a steel valve body (1) is sleeved on the positioning mandrel (4); cavities cooperating with the steel valve body (1) are provided in the upper mould (2) and the lower mould (3); a second positioning pin (302) cooperating with the bottom end of the steel valve body (1) is provided at the bottom end of the lower mould (3); the second positioning pin (302) is slidably arranged in a slide groove of the lower mould (3) up and down; a first positioning pin (301) cooperating with the side wall of the steel valve body (1) is provided on the side wall of the lower mould (3); the first positioning pin (301) is slidably arranged in the slide groove of the lower mould (3) left and right.

2. The split ball valve fluorine lining device according to claim 1 is characterized in that: A positioning core block (303) is slidably arranged in the opening groove of the lower mold (3) and matches the square hole on the side wall of the steel valve body (1).

3. The split ball valve fluorine lining device according to claim 2 is characterized in that: A tilted ejector rod (202) is provided on the side wall of the upper mold (2) and is matched with a through hole on the positioning core block (303).

4. The split ball valve fluorine lining device according to claim 1 is 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 split ball valve fluorine lining device according to claim 4 is characterized in that: The bottom end of the steel valve body (1) is provided with a limiting groove which cooperates with one of the second positioning pins (302).

6. The split ball valve fluorine lining device according to claim 1 is characterized in that: The lower mold (3) is fixedly arranged on the base (6), and a turntable (304) is rotatably arranged between the lower mold (3) and the base (6). A first driving groove (305) is provided on the upper surface of the turntable (304), and the first positioning pin (301) cooperates with the first driving groove (305) through a first guide roller (309). A second driving groove (307) is provided on the side wall of the turntable (304), and the second positioning pin (302) cooperates with the second driving groove (307) through a second guide roller (310).

7. The split ball valve fluorine lining device according to claim 6 is characterized in that: The bottom end of the rotating disk (304) is rotatably arranged on the base (6) via a slide rail (308); a rotating handle (306) is arranged on the side wall of the rotating disk (304).

8. The split ball valve fluorine lining device according to claim 1 is characterized in that: The top end of the upper mold (2) is provided with a feeding port (201), and the feeding port (201) cooperates with the injection rod (5).

9. The split ball valve fluorine lining device according to claim 1 is characterized in that: A convex ring is provided on the lower surface of the upper mold (2) and matches with the groove on the upper surface of the lower mold (3).

10. A method for lining a split ball valve with fluorine, comprising the split ball valve lining device according to any one of claims 1 to 9, characterized in that The steps include: Step 1: sleeve the steel valve body (1) onto the positioning core shaft (4) of the lower mold (3), so that the lower end surface 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: Match the limiting groove on the lower end surface of the steel valve body (1) with the corresponding second positioning pin (302), so that the square hole on the side wall of the steel valve body (1) can match with the positioning core block (303); Step three, the upper mold (2) is pressed onto the lower mold (3) and fixed by bolts, and the upper mold (2) is pressed against the positioning core block (303) by the inclined ejector rod (202) during the descending process; Step 4, putting the solid powdered FEP material into the mold through the feeding port (201), and heating the entire mold; Step 5, placing the heated mold under the injection rod (5), and the injection rod (5) performs injection through the feeding port (201); Step 6, after waiting for the FEP material to initially solidify, the handle (306) is turned to drive the turntable (304) to rotate, and the turntable (304) drives the first positioning pin (301) to translate outward through the first driving chute (305) and the first guide roller (309), and the turntable (304) drives the second positioning pin (302) to move downward through the second driving chute (307) and the second guide roller (310), and 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 is completely cooled, the upper mold (2) is removed and the turntable (304) is rotated in the opposite direction to demould the primary finished ball valve product.

Images