A valve body sealing diaphragm welding device

Abstract

The present invention discloses a valve body sealing diaphragm welding device, which relates to the field of diaphragm welding. The valve body sealing diaphragm welding device includes a base and a top cover threadedly matched therewith; a centering component, including a first support seat, a second support seat and a third support seat coaxially arranged with the base; the second support seat is coaxially arranged between the first support seat and the third support seat and at least one is arranged; the middle parts of the first support seat, the second support seat and the third support seat are coaxially arranged with openings, and the openings together form a complete conical opening. The second support seat and the third support seat can both move along their respective axes. Through the design of the diaphragm welding device, general welding tools can correspond to different diaphragm models or diaphragm pressure plates, and the diaphragm is always in a horizontal central position during welding, which ensures the stability of the device during operation, reduces production costs, and improves work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm welding, in particular to a valve body sealing diaphragm welding device. Background Art

[0002] The diaphragm of the valve is one of the key regulating components inside the valve, which plays a role in balancing the input and output pressures. The diaphragm is generally made of elastic materials (such as rubber, fluororubber or polymer materials). For example, in a pressure reducing valve, the fluid enters the valve body through the inlet, acts on the diaphragm after passing through the valve core, and balances the force of the spring on one side of the diaphragm, so that the gas pressure is reduced and then flows out from the outlet. In addition, the diaphragm can adaptively adjust the valve core opening to keep the outlet pressure stable at the adjusted value.

[0003] In order to ensure the stability of the connection between the diaphragm and the spring, it is often necessary to weld a diaphragm pressure plate on one side of the diaphragm, and the spring is set on the diaphragm pressure plate to ensure the stability of the spring during operation. In order to ensure that the force of the spring can act on the center of the diaphragm, it is necessary to ensure that the diaphragm and the diaphragm pressure plate have good coaxiality after welding, and the welding points on the diaphragm should be evenly distributed along the circumference, and overburning and splashing are not allowed, and the diaphragm is not allowed to be scratched.

[0004] However, the current general diaphragm welding device has problems such as low coaxiality and uneven welding points when welding the diaphragm and the diaphragm pressure plate. In addition, the general welding tooling can only correspond to one type of diaphragm or diaphragm pressure plate. When welding diaphragms of different types and sizes, different tooling is often required, which is time-consuming and labor-intensive, and increases production costs. Summary of the invention

[0005] In view of the above problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is that the general diaphragm welding device has uneven welding points, low coaxiality between the diaphragm and the diaphragm pressure plate and cannot be used for diaphragms of different models.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a valve body sealing diaphragm welding device, which includes a base and a top cover threadedly matched with the base; a centering assembly, including a first support seat, a second support seat and a third support seat coaxially arranged with the base; the second support seat is coaxially arranged between the first support seat and the third support seat and at least one is arranged; the middle parts of the first support seat, the second support seat and the third support seat are respectively coaxially arranged with openings, and the openings together form a complete conical opening; the second support seat and the third support seat can both move along their respective axes; when the second support seat moves, the fixing member arranged inside the first support seat will move synchronously; when the third support seat moves, the fixing member arranged inside the second support seat will also move synchronously; the fixing member is used to fix the workpiece.

[0008] As a preferred solution of the valve body sealing diaphragm welding device of the present invention, a first elastic member is fixedly provided on the top of the first support seat, and a support ring is fixedly provided on the top of the first elastic member, and the support ring is used to place a pressure plate.

[0009] As a preferred solution of the valve body sealing diaphragm welding device of the present invention, the second support seat is coaxially arranged inside the first support seat and the outer wall of the second support seat is matched with the inner wall of the first support seat.

[0010] As a preferred solution of the valve body sealing diaphragm welding device of the present invention, the second support seat includes an upper plate and a lower ring, the upper plate and the lower ring are detachably connected, and a second elastic member is fixedly provided on the bottom of the lower ring.

[0011] As a preferred solution of the valve body sealing diaphragm welding device described in the present invention, the third support seat is coaxially arranged inside the second support seat and the outer wall of the third support seat cooperates with the inner wall of the second support seat, and a third elastic member is also arranged at the bottom of the third support seat.

[0012] As a preferred solution of the valve body sealing diaphragm welding device described in the present invention, wherein: the fixing parts are respectively arranged in the first support seat and the second support seat, and the fixing parts include a wedge block and a pull rod; the side of the wedge block close to the conical opening is flush with the side wall of the conical opening; the pull rod is fixedly connected to the second support seat and the third support seat respectively.

[0013] As a preferred solution of the valve body sealing diaphragm welding device of the present invention, the base further includes a cushion block, which is arranged at the bottom of the third elastic member and whose outer wall can cooperate with the inner wall of the second support seat.

[0014] As a preferred solution of the valve body sealing diaphragm welding device of the present invention, a welding hole is opened in the middle of the top cover, and a boss is formed on the side wall of the through hole, and the boss is used to squeeze the diaphragm.

[0015] As a preferred solution of the valve body sealing diaphragm welding device of the present invention, wherein: the top cover also includes a positioning bolt, and the positioning bolt has a conical surface.

[0016] As a preferred solution of the valve body sealing diaphragm welding device of the present invention, a through hole is opened in the middle of the diaphragm, and a positioning hole is opened in the middle of the pressure plate, and the positioning bolt can pass through the through hole and cooperate with the positioning hole.

[0017] The beneficial effects of the present invention are as follows: through the design of the diaphragm welding device, general welding tools can correspond to different diaphragm models or diaphragm pressure plates, and the diaphragm is always in a horizontal central position during welding, which ensures the stability of the device during operation, reduces production costs, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is an overall schematic diagram of the valve body sealing diaphragm welding device.

[0020] Figure 2 for Figure 1 A is an enlarged view of the middle image.

[0021] Figure 3 Another schematic diagram of a valve body sealing diaphragm welding device.

[0022] Figure 4 for Figure 3 Enlarged view of B.

[0023] Figure 5 Schematic diagram of the wedge block of the valve body sealing diaphragm welding device.

[0024] Figure 6 Another schematic diagram of a valve body sealing diaphragm welding device. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively. Example

[0028] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, provides a valve body sealing diaphragm welding device, which includes a base 100, a top cover 200 and a centering assembly 300.

[0029] Specifically, the top cover 200 is threadedly matched with the outer wall of the base 100, and the centering assembly 300 includes a first support seat 301, a second support seat 302, and a third support seat 303 coaxially arranged with the base 100; the second support seat 302 is coaxially arranged between the first support seat 301 and the third support seat 303 and at least one is arranged. A placement groove is provided on the base 100, and the centering assembly 300 is matched with the placement groove, the outer wall of the first support seat 301 is matched with the inner wall of the placement groove, the second support seat 302 is coaxially arranged inside the first support seat 301 and the outer wall of the second support seat 302 is matched with the inner wall of the first support seat 301, and the third support seat 303 is coaxially arranged inside the second support seat 302 and the outer wall of the third support seat 303 is matched with the inner wall of the second support seat 302.

[0030] Furthermore, the middle parts of the first support seat 301, the second support seat 302 and the third support seat 303 are coaxially arranged with openings, and the openings together form a complete conical opening K; the second support seat 302 and the third support seat 303 can move along their respective axes, and the pressure plate 500 cooperates with the opening K.

[0031] A first elastic member 301 a is fixedly disposed on the top of the first support seat 301 . The first elastic member 301 a may be a combination of a telescopic column and an externally sleeved spring and has a relatively small elastic force.

[0032] A support ring 301b is also fixedly provided on the top of the first elastic member 301a. The support ring 301b is used to place a pressure plate 500. The cross-sectional shape of the pressure plate 500 is T-shaped (it should be noted that most diaphragm pressure plates on the market are cylinders with stepped diameter changes). The diaphragm 600 is placed on the upper part of the pressure plate 500, and the bottom end of the pressure plate 500 is in contact with the inner wall of the opening K.

[0033] A welding hole 201 is provided in the middle of the top cover 200, and a boss 202 is formed on the side wall of the welding hole 201. The boss 202 is arranged on the upper side of the diaphragm 600 for squeezing the diaphragm 600. The welding gun 700 extends into the welding hole 201 to weld the diaphragm 600 and the pressure plate 500. A through hole 601 is provided in the middle of the diaphragm 600, and a positioning hole 501 is provided in the middle of the pressure plate 500. The positioning bolt 203 passes through the through hole 601 and cooperates with the positioning hole 501. The positioning bolt 203 passes through the through hole 601 and the positioning hole 501 so that the through hole 601 and the positioning hole 501 are coaxial, so that the diaphragm 600 and the pressure plate 500 are coaxially fixed together and rise or fall vertically synchronously.

[0034] When in use, the pressing plate 500 is first placed on the supporting ring 301b. During this process, the pressing plate 500 will press the first elastic member 301a under its own weight and slowly move downward. When the bottom of the pressing plate 500 hits the side wall of the opening K, the pressing plate 500 will gradually move toward the middle until it reaches the center of the base 100, completing the centering of the pressing plate 500 and the base 100.

[0035] Then, the diaphragm 600 is placed on the pressure plate 500 and the positioning bolt 203 is passed through the through hole 601 to cooperate with the positioning hole 501, so that the diaphragm 600 and the pressure plate 500 are aligned and fixed to each other. Then, the top cover 200 is tightened, so that the boss 202 presses the diaphragm 600 and the pressure plate 500 downward while the top cover 200 is rotated downward until they are completely fixed. At this time, the welding gun 700 can be extended into the welding hole 201 to weld the diaphragm 600 and the pressure plate 500, and the diaphragm 600 is rotated and welded to form a circle of uniform welding points. Example

[0036] Reference Figure 2~Figure 5 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0037] Specifically, the valve body sealing diaphragm welding device also includes a fixing member 400, which is respectively fixedly arranged at the first support seat 301 and the second support seat 302 near the opening K. When the second support seat 302 moves, the fixing member 400 arranged inside the first support seat 301 will move synchronously; when the third support seat 303 moves, the fixing member 400 arranged inside the second support seat 302 will also move synchronously; the fixing member 400 is used to fix the workpiece. One end of the fixing member 400 arranged inside the first support seat 301 is fixedly connected to the second support seat 302. When the bottom end of the pressure plate 500 is against the opening K on the side wall of the second support seat 302, the pressure plate 500 is pressed downward by force and squeezes the second support seat 302, so that the second support seat 302 moves downward, and the fixing member 400 also moves downward.

[0038] Furthermore, the fixing member 400 includes a wedge block 401 and a pull rod 402; the side of the wedge block 401 close to the conical opening K is flush with the side wall of the conical opening K; the pull rod 402 is fixedly connected to the second support seat 302 and the third support seat 303 respectively. The wedge block 401 has a strip groove in the horizontal direction, and a slider is fixedly arranged at the upper end of the pull rod 402. The slider is always arranged in the strip groove. When the pull rod 402 moves downward under the pulling force of the second support seat 302, the slider moves horizontally to the right in the strip groove, and the pull rod 402 moves to the right while moving downward. The side of the wedge block 401 close to the conical opening K slides downward along the side wall of the opening K until one end of the wedge block 401 abuts against the lower part of the pressure plate 500 and fits with the outer wall of the pressure plate 500, thereby fixing the pressure plate 500.

[0039] It should be noted that multiple second support seats 302 can be provided (one is provided in the present embodiment), and multiple second support seats 302 can divide the entire conical opening K into multiple gears, so that when the pressure plate 500 of different sizes is placed in the conical opening K, the bottom of the pressure plate 500 will also contact different second support seats 302. For example, a larger pressure plate 500 will contact the second support seat 302 that is a little higher, and a smaller pressure plate 500 will contact the second support seat 302 that is a little lower. No matter which second support seat 302 is pressed down by the pressure plate 500, the fixing member 400 can fix the pressure plate 500, and the tighter the pressure plate 500 is pressed down, the tighter the fixing member 400 is fixed, so as to prevent the pressure plate 500 from deflecting.

[0040] Among them, there are four fixing parts 400, which are evenly distributed around the pressure plate 500. When the bottom end of the pressure plate 500 is against the opening K on the side wall of the second support seat 302, the welding gun 700 first welds on one side of the diaphragm. At this time, the diaphragm 600 and the pressure plate 500 are easy to be separated from the horizontal position, resulting in unstable welding. When the pressure plate 500 is under pressure and continuously squeezes the side wall of the second support seat 302, it will cause the fixing part 400 to move downward, and the side of the wedge block 401 close to the conical opening K slides down along the inclined surface until it fits on the outer wall of the pressure plate 500, thereby reinforcing the pressure plate 500 so that the pressure plate 500 can be fixed in the opening K.

[0041] A first elastic member 301a is fixedly disposed on the top of the first support seat 301. The second support seat 302 includes an upper plate 302a and a lower ring 302b. The upper plate 302a and the lower ring 302b are detachably connected. A second elastic member 302c is fixedly disposed on the bottom of the lower ring 302b. A third elastic member 303a is also disposed on the bottom of the third support seat 303. A protrusion is disposed on the bottom of the upper plate 302a, and a groove is disposed on the top of the lower ring 302b. The protrusion and the groove are completely locked to ensure that the upper plate 302a and the lower ring 302 do not shift.

[0042] The first elastic member 301a, the second elastic member 302c and the third elastic member 303a all include a sleeve, a telescopic rod and a spring. The telescopic rod is arranged inside the sleeve and slidably cooperates with the inner wall of the sleeve. The spring is sleeved outside the sleeve and the two ends of the spring are respectively fixedly connected to the top outer wall of the telescopic rod and the bottom outer wall of the sleeve. The top of the spring is respectively fixedly connected to the bottom side of the support ring 301b, the bottom side of the lower ring 302b and the bottom side of the third support seat 303.

[0043] It should be noted that there are four first elastic members 301a, four second elastic members 302c and four third elastic members 303a, which are evenly distributed on the circumference. When the pressure plate 500 is squeezed and touches the side wall of the first support seat 301, the first elastic member 301a will be pressed to cause the spring to contract, playing a balancing and buffering role. When the pressure plate 500 is squeezed and touches the side wall of the second support seat 302, the upper plate 302a is pressed to cause the lower ring 302b to be pressed, and the second elastic member 302c is compressed, providing space for the fixing member 400 to better fix the pressure plate 500.

[0044] When in use, first fix the diaphragm 600 and the pressure plate 500 with the positioning bolts 203 so that the bottom end of the pressure plate 500 abuts against the side wall of the second support seat 302, and then tighten the top cover 200 so that the pressure plate 500 is squeezed downward, causing the second support seat 302 to be compressed downward, driving the fixing member 400 in the first support seat 301 to move downward, and the wedge block 402 in the fixing member 400 slides downward along the side close to the conical opening K until one end of the wedge block 402 abuts against the lower part of the pressure plate, fixing the pressure plate on all sides so that the pressure plate can be stuck in the center of the opening K and remain unchanged, while also maintaining coaxiality. Example

[0045] Reference Figure 6 , which is the third embodiment of the present invention, and is based on the first two embodiments.

[0046] Specifically, the base 100 further includes a cushion block 101, which is disposed at the bottom of the third elastic member 303a and whose outer wall can cooperate with the inner wall of the second support seat 302. Since the upper plate 302a and the lower ring 302b are detachably connected, the upper plate 302a and the lower ring 302b can be disassembled in special circumstances, and the upper plate 302a can be removed, leaving only the lower ring 302b.

[0047] Furthermore, in a special case, when the lower part of the pressure plate 500 is very narrow, the two ends of the bottom of the pressure plate 500 are too narrow to touch the side walls even after being placed in the conical opening K. At this time, the upper plate 302a in the second support seat 302 can be removed, and the gasket 101 can be placed on the bottom of the third support seat 303 and the third elastic member 303a, so as to raise the third support seat 303. Because the opening of the third support seat 303 at the bottom is narrow, it can be used to the maximum extent possible for the pressure plate 500 with a narrow bottom, so at this time, the third support seat 303 can be raised to be used in this extreme case.

[0048] Only the third support seat 303 is needed, and the gasket 101 is fixedly arranged on the upper part of the placement groove to lift the third support seat 303 to a certain height so that the pressure plate 500 can cooperate with the side wall of the third support seat 303.

[0049] When in use, the upper plate 302a of the second support seat 302 is removed, and a gasket 101 is added to the lower part of the third elastic member 303a. At this time, the outer wall of the third support seat 303 cooperates with the lower ring 302b, so that the pressure plate 500 presses against the side wall of the third support seat 303.

[0050] In summary, the beneficial effects of the present invention are:

[0051] 1. Through the design of the diaphragm welding device, the diaphragm and the pressure plate can maintain good coaxiality during welding, and always maintain welding in the central horizontal position.

[0052] 2. Through the design of the diaphragm welding device, general welding tools can correspond to a variety of different types of diaphragms and pressure plates, which improves resource utilization and reduces production costs.

[0053] 3. The design of the diaphragm welding device ensures the stability of welding, so that the welding points on the diaphragm are evenly distributed and the welding effect is better.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A valve body sealing diaphragm welding device, characterized in that: include, A base (100) and a top cover (200) threadably matched therewith; A centering assembly (300) comprising a first support seat (301), a second support seat (302), and a third support seat (303) coaxially arranged with the base (100); the second support seat (302) is coaxially arranged between the first support seat (301) and the third support seat (303), and at least one of the second support seats (302) is provided; The first support seat (301), the second support seat (302) and the third support seat (303) are coaxially provided with openings in their middle parts, and the openings together form a complete conical opening (K); The second support seat (302) and the third support seat (303) are both capable of moving along their respective axes; when the second support seat (302) moves, the fixing member (400) disposed inside the first support seat (301) moves synchronously; when the third support seat (303) moves, the fixing member (400) disposed inside the second support seat (302) also moves synchronously; the fixing member (400) is used to fix a workpiece; The fixing member (400) is respectively arranged in the first supporting seat (301) and the second supporting seat (302), and the fixing member (400) comprises a wedge block (401) and a pull rod (402); a surface of the wedge block (401) close to the conical opening (K) is flush with the side wall of the conical opening (K); the pull rod (402) is respectively fixedly connected to the second supporting seat (302) and the third supporting seat (303).

2. The valve body sealing diaphragm welding device according to claim 1, characterized in that: A first elastic member (301a) is also fixedly disposed on the top of the first support seat (301), and a support ring (301b) is also fixedly disposed on the top of the first elastic member (301a), wherein the support ring (301b) is used to place a pressure plate (500).

3. The valve body sealing diaphragm welding device according to claim 2, characterized in that: The second support seat (302) is coaxially arranged inside the first support seat (301), and the outer wall of the second support seat (302) cooperates with the inner wall of the first support seat (301).

4. The valve body sealing diaphragm welding device according to claim 3, characterized in that: The second support seat (302) comprises an upper plate (302a) and a lower ring (302b); the upper plate (302a) and the lower ring (302b) are detachably connected; and a second elastic member (302c) is fixedly provided at the bottom of the lower ring (302b).

5. The valve body sealing diaphragm welding device according to claim 4, characterized in that: The third support seat (303) is coaxially arranged inside the second support seat (302), and the outer wall of the third support seat (303) cooperates with the inner wall of the second support seat (302). A third elastic member (303a) is also arranged at the bottom of the third support seat (303).

6. The valve body sealing diaphragm welding device according to claim 5, characterized in that: The base (100) further comprises a cushion block (101), wherein the cushion block (101) is arranged at the bottom of the third elastic member (303a) and the outer wall of the cushion block (101) is capable of cooperating with the inner wall of the second support seat (302).

7. The valve body sealing diaphragm welding device according to claim 6, characterized in that: A welding hole (201) is provided in the middle of the top cover (200), a boss (202) is formed on the side wall of the welding hole (201), and the boss (202) is used to extrude the diaphragm (600).

8. The valve body sealing diaphragm welding device according to claim 7, characterized in that: The top cover (200) further comprises a positioning bolt (203), wherein the positioning bolt (203) has a tapered surface.

9. The valve body sealing diaphragm welding device according to claim 8, characterized in that: A through hole (601) is provided in the middle of the diaphragm (600), and a positioning hole (501) is provided in the middle of the pressure plate (500), and the positioning bolt (203) can pass through the through hole (601) and cooperate with the positioning hole (501).

Images