CN112096912A - A manual diaphragm valve and its manufacturing process - Google Patents

Abstract

The invention discloses a manual diaphragm valve and a manufacturing process thereof, comprising a valve body, a hand wheel, a valve stem, a diversion port and a valve seat. The bottom of the seat is fixedly connected with the outer wall of the top of the valve seat. In the present invention, when the handwheel drives the rotation of the valve stem, the handwheel will synchronously drive the connection seat of the outer wall to rotate, and the protrusions that are elastically connected to the inner surface wall of the connection seat through the two elastic members will be due to the action of multiple groups of clamping grooves. In the process of rotation, the telescopic motion is repeated to ensure the smooth rotation of the valve stem, until the valve reaches the specified opening range, the convex block will be in this position with the inner surface wall of the limit seat under the action of the second elastic member The elastic potential energy of the two elastic members exerts a certain damping effect on the handwheel, so as to ensure the normal rotation of the valve stem and realize the self-locking of the valve stem, thereby improving the use stability of the manual diaphragm valve.

Description

A manual diaphragm valve and its manufacturing process

technical field

The invention relates to the technical field of manual diaphragm valves, in particular to a manual diaphragm valve and a manufacturing process thereof.

Background technique

The advantages of manual diaphragm valves are similar to pinch valves. Its closure element is not wetted by the process medium and can therefore be manufactured using less expensive materials in aggressive process media. The flow stream is straight or nearly straight and produces a small pressure drop, making it ideal for on-off operation and avoiding turbulence. Diaphragm valves can also be used for throttling operation. However, when a throttling position is maintained near the bottom of the valve body, sometimes small particles will cut grass at the bottom of the diaphragm or valve body and cause corrosion. Because the diaphragm is located in the pressure-retaining valve body, the diaphragm valve can handle slightly higher pressures than the pinch valve, but the overall pressure and temperature rating range is dependent on the toughness of the material or the reinforcement of the diaphragm. The valve body flow path is related to the amount of diaphragm toughness. Another advantage of diaphragm valves is that if the diaphragm fails, the valve body can accommodate shallow flow rather than tightening the valve housing.

At present, the existing manual diaphragm valves still have shortcomings. First, most of the existing manual diaphragm valves lack a self-locking mechanism. Since the manual diaphragm valve is driven by the manual rotation of the handwheel, the valve stem and the valve seat are connected. There is an activity characteristic between the diaphragm valves, which makes the diaphragm valve itself easily shake due to vibration and impact when the diaphragm valve is artificially adjusted to reach the specified opening, resulting in the self-deflection of the valve stem, which in turn affects the stability of the manual diaphragm valve; Secondly, the existing manual diaphragm valve lacks a self-filtering mechanism; since most of the valve core part of the manual diaphragm valve adopts a plastic diaphragm, when there are large solid particles in the fluid, the solid particles are easy to follow the flow of the fluid. The impact and friction can easily lead to the damage of the diaphragm, which in turn makes the manual diaphragm valve unable to use normally, thereby reducing the use effect of the manual diaphragm valve.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a manual diaphragm valve and its manufacturing process in order to solve the above problems.

In order to achieve the above object, the present invention adopts the following technical solutions:

A manual diaphragm valve includes a valve body, a handwheel, a valve stem, a diversion port and a valve seat, and the manual diaphragm valve further includes:

A limit seat and a connecting seat, the bottom of the limit seat is fixedly connected to the outer wall of the top of the valve seat, the connecting seat is fixedly connected to the outer wall of the vertical end of the handwheel, and the inner wall of the connecting seat is elastically connected by two elastic members There are bumps, and the two outer walls of the elastic member are in contact with the inner wall of the connecting seat, the bumps are engaged with the inner wall of the limit seat through the clamping groove, and the plurality of groups of the clamping grooves are annularly distributed. And the plurality of groups of the card slots are arranged vertically through.

As a further description of the above technical solution:

A filter chamber is fixedly installed between the valve body and the diversion port, a connection plate is fixedly installed at the top of the filter chamber, and a filter seat is fixedly installed at the bottom of the connection plate to be connected with the inner cavity of the filter chamber, and the A filter element 1 and a filter element 2 are respectively installed in the inner cavity of the filter seat from left to right, both of which are in conical structures.

As a further description of the above technical solution:

The top of the horizontal end of the limit seat is elastically connected with a ring plate through an elastic member, and both sides of the horizontal end of the ring plate are in contact with the inner wall of the vertical end of the limit seat and the outer wall of the valve seat at the same time.

As a further description of the above technical solution:

Both sides of the opening ends of the plurality of sets of the card slots are arc-shaped structures.

As a further description of the above technical solution:

The diversion port, the valve body and the filter chamber, and the filter chamber and the connecting plate are all fixedly connected by bolts.

As a further description of the above technical solution:

The top of the ring plate is provided with a rough cushion.

As a further description of the above technical solution:

The manufacturing process includes the following steps:

S1. Material testing: chemical analysis is performed on the base material of metal castings by a chemical analyzer to detect whether the content of sulfur and phosphorus in the base material meets the standard;

S2. Machining of castings: The base materials of castings are respectively processed into corresponding contour shapes by CNC lathes and copying lathes, which are used as modeling components for standby;

S3. Diaphragm pressing: kneading with a rubber rolling machine, then automatically sliced by an extruder with a rotary knife, cooled with water to make coarse flakes, then dipped in soapy water, put into a CNC blanking machine to form diaphragm flakes, Then lamination by hand, at the same time lined with several layers of nylon mesh and insert screws, and finally put into a rubber hot press for pressure, and vulcanized to form a diaphragm for use;

S4. Lining: first degreasing, sandblasting and purifying the shell, then apply an adhesive layer to the parts that need to be lined in the inner cavity, and then manually attach the rubber sheet to the adhesive layer, and then integrate the The shell is put into a special mold blank, and is injection-molded and hot-pressed on an injection molding machine of the corresponding tonnage pressure level, and the temperature of the mold is adjusted by electric heating and water cooling;

S5. Assembly and molding: Assemble and integrate each modeling component through different fasteners according to the drawing to form a diaphragm valve.

As a further description of the above technical solution:

After completing the assembly of the diaphragm valve in S5, the surface of the diaphragm valve needs to be treated. Specifically, a phosphating treatment method is used, that is, an assembly line operation is used. There are 10 phosphide liquid tanks in total, and every two tanks are used as a process group. The time is 8 minutes.

To sum up, due to the adoption of the above-mentioned technical solutions, the beneficial effects of the present invention are:

1. In the present invention, in the process that the handwheel drives the rotation of the valve stem, the handwheel will simultaneously drive the connecting seat of the outer wall to rotate, and the inner surface wall of the connecting seat is elastically connected by the second elastic member. In the process of rotation, the telescopic movement is repeated to ensure the smooth rotation of the valve stem until the valve reaches the specified opening range, the bump will automatically and the inner surface wall of the limit seat under the action of the second elastic member. The combination of the grooves at this position applies a certain damping effect to the handwheel through the elastic potential energy of the elastic member 2 itself, so as to ensure the normal rotation of the valve stem and realize the self-locking of the valve stem, thereby improving the use of the manual diaphragm valve. stability.

2. In the present invention, the fluid will pass through the filter seat before being introduced into the valve body from the diversion port, and the fluid will first pass through the filter element 1 and then through the second filter element. The filter element 2 ensures the fluid conduction area, and the solid impurities in the fluid will be deposited in the semi-closed cavity composed of the filter seat, the filter element 1 and the filter element 2. The connecting plate fixedly connected with the filter chamber can be loosened regularly and pulled out. The filter seat completes the centralized treatment of impurities, thereby improving the use effect of the manual diaphragm valve.

3. In the present invention, when the diaphragm in the manual diaphragm valve closes the valve body, the connecting seat first abuts the ring plate and slowly pushes the ring plate to move down. At this time, due to the elastic potential energy of the elastic member 1, the The operator senses obvious resistance, and at the same time buffers the torsional force applied by the operator to the valve stem, so as to avoid the large torsional force exerted by the operator who cannot understand the state of the diaphragm, causing the diaphragm and the inner surface of the valve body to generate Excessive cooperation can avoid the damage of the diaphragm, thereby improving the use range of the manual diaphragm valve.

Description of drawings

Fig. 1 is the overall structure schematic diagram in the present invention;

Fig. 2 is a schematic view of enlarged structure at place A in the present invention;

Fig. 3 is the structural representation of the limit seat in the present invention;

Fig. 4 is the structural representation of the connection seat in the present invention;

FIG. 5 is a schematic structural diagram of a filter chamber in the present invention.

illustration:

1. Handwheel; 2. Valve stem; 3. Limit seat; 4. Connecting seat; 5. Elastic part 1; 6. Valve seat; 7. Valve body; 8. Filter bin; 9. Diversion port; 10. Ring plate; 11, bump; 12, card slot; 13, elastic piece two; 14, connecting plate; 15, filter seat; 16, filter piece one; 17, filter piece two.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

Please refer to Figure 1-5, a manual diaphragm valve, including valve body 7, hand wheel 1, valve stem 2, guide port 9 and valve seat 6, the manual diaphragm valve also includes:

The limit seat 3 and the connection seat 4 are fixedly connected with the bottom of the limit seat 3 and the outer wall of the top of the valve seat 6. The connection seat 4 is fixedly connected to the outer wall of the vertical end of the handwheel 1. The inner surface of the connection seat 4 passes through the elastic member 2 13 A bump 11 is elastically connected, and the outer wall of the second elastic member 13 is in contact with the inner wall of the connecting seat 4. The bump 11 is engaged with the inner wall of the limit seat 3 through the clamping slot 12. Circular distribution, and the multiple groups of card slots 12 are arranged vertically through, and both sides of the open ends of the multiple groups of card slots 12 are arc-shaped structures to ensure the matching effect of the bumps 11 and the card slots 12 .

In the process that the handwheel 1 drives the valve stem 2 to rotate, the handwheel 1 will synchronously drive the connecting seat 4 of the outer wall to rotate. Due to the action of the groove 12, the telescopic movement is repeated during the rotation to ensure the smooth rotation of the valve stem 2 until the valve reaches the specified opening range, the convex block 11 will automatically and limit the position under the action of the elastic member 2 13 The inner surface wall of the seat 3 is combined with the slot 12 at this position, and a certain damping effect is applied to the handwheel 1 through the elastic potential energy of the elastic member 2 13 itself, so as to ensure the normal rotation of the valve stem 2 and realize the valve stem 2. Self-locking, thus improving the stability of the manual diaphragm valve.

A manufacturing process of a manual diaphragm valve, the manufacturing process comprises the following steps:

S1. Material testing: chemical analysis is performed on the base material of metal castings by a chemical analyzer to detect whether the content of sulfur and phosphorus in the base material meets the standard;

S2. Machining of castings: The base materials of castings are respectively processed into corresponding contour shapes by CNC lathes and copying lathes, which are used as modeling components for standby;

S3. Diaphragm pressing: kneading with a rubber rolling machine, then automatically sliced by an extruder with a rotary knife, cooled with water to make coarse flakes, then dipped in soapy water, put into a CNC blanking machine to form diaphragm flakes, Then lamination by hand, at the same time lined with several layers of nylon mesh and insert screws, and finally put into a rubber hot press for pressure, and vulcanized to form a diaphragm for use;

S4. Lining: first degreasing, sandblasting and purifying the shell, then apply an adhesive layer to the parts that need to be lined in the inner cavity, and then manually attach the rubber sheet to the adhesive layer, and then integrate the The shell is put into a special mold blank, and is injection-molded and hot-pressed on an injection molding machine of the corresponding tonnage pressure level, and the temperature of the mold is adjusted by electric heating and water cooling;

S5. Assembly and molding: Assemble and integrate each modeling component through different fasteners according to the drawing, and treat the surface of the diaphragm valve. Specifically, the phosphating treatment method is adopted, that is, the pipeline operation is adopted. There are 10 phosphide liquid tanks in total. Every two tanks is a process group, and the processing time is 8min to form a diaphragm valve.

The difference from the first example is that

Embodiment 2:

Please refer to FIG. 1 and FIG. 5 , the filter chamber 8 is fixedly installed between the valve body 7 and the diversion port 9 , the connection plate 14 is fixedly installed on the top of the filter chamber 8 , and the inner cavity of the filter chamber 8 is fixedly installed at the bottom of the connection plate 14 . The filter seat 15 is snap-connected, and the inner cavity of the filter seat 15 is respectively installed with the filter element 1 16 and the filter element 2 17 in the conical structure from left to right, the diversion port 9, the valve body 7 and the filter chamber 8 and Both the filter bin 8 and the connecting plate 14 are fixedly connected by bolts, so as to facilitate mutual assembly and disassembly.

Before the fluid is introduced from the diversion port 9 to the valve body 7, it will first pass through the filter chamber 8, and the fluid will first pass through the filter element 1 16 and then pass through the filter element 2 17. The filter element 2 17 ensures the fluid conduction area, and at the same time, the solid impurities in the fluid will be deposited in the semi-closed cavity composed of the filter seat 15, the filter element 1 16 and the filter element 2 17, which can be loosened and fixed to the filter chamber 8 regularly. The connecting plate 14 is connected and the filter seat 15 is pulled out to complete the centralized treatment of impurities, thereby improving the use effect of the manual diaphragm valve.

The difference from the first example is that

Embodiment three:

Please refer to FIG. 1 and FIG. 2 , the top of the horizontal end of the limit seat 3 is elastically connected with a ring plate 10 through an elastic member 1 5 , and both sides of the horizontal end of the ring plate 10 are simultaneously connected with the inner surface wall of the vertical end of the limit seat 3 and the valve seat 6. The outer walls are in contact with each other, and the top of the ring plate 10 is provided with a rough cushion, so as to ensure the damping effect sensed by the operator.

When the diaphragm in the manual diaphragm valve closes the valve body 7, the connecting seat 4 will first abut the ring plate 10 and slowly push the ring plate 10 to move down. The operator senses obvious resistance, and at the same time buffers the torsional force applied by the operator to the valve stem 2, so as to avoid the large torsional force exerted by the operator not being able to clearly understand the diaphragm state. The wall produces an excessively large fit, thereby avoiding damage to the diaphragm, thereby increasing the range of use of the manual diaphragm valve.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (8)

1. The manual diaphragm valve comprises a valve body (7), a hand wheel (1), a valve rod (2), a flow guide port (9) and a valve seat (6), and is characterized by further comprising:

spacing seat (3) and connecting seat (4), spacing seat (3) bottom and disk seat (6) top exterior wall fixed connection, connecting seat (4) fixed connection is at the vertical outer table wall of end of hand wheel (1), the table wall has lug (11) through two (13) elastic connection of elastic component in connecting seat (4), just the outer table wall of elastic component two (13) is laminated with connecting seat (4) interior table wall, lug (11) are through draw-in groove (12) and spacing seat (3) interior table wall looks block, multiunit draw-in groove (12) are the annular distribution, and the multiunit draw-in groove (12) all are vertical the setting that runs through.

2. The manual diaphragm valve according to claim 1, wherein a filtering bin (8) is fixedly installed between the valve body (7) and the flow guide port (9), a connecting plate (14) is fixedly installed at the top of the filtering bin (8), a filtering seat (15) which is connected with an inner cavity of the filtering bin (8) in a clamping manner is fixedly installed at the bottom of the connecting plate (14), and a filtering piece I (16) and a filtering piece II (17) which are both in a conical structure are respectively installed in the inner cavity of the filtering seat (15) from left to right.

3. A manual diaphragm valve according to claim 1, wherein the top of the horizontal end of the limiting seat (3) is elastically connected with a ring plate (10) through a first elastic member (5), and two sides of the horizontal end of the ring plate (10) are simultaneously abutted with the inner surface wall of the vertical end of the limiting seat (3) and the outer surface wall of the valve seat (6).

4. A manual diaphragm valve according to claim 1, wherein the open ends of said plural groups of said slots (12) are both arc-shaped.

5. A manual diaphragm valve according to claim 2, wherein the diversion port (9), the valve body (7) and the filter bin (8) and the connecting plate (14) are fixedly connected through bolts.

6. A manual diaphragm valve according to claim 3, wherein the top of the annular plate (10) is provided with a rough backing layer.

7. A manual diaphragm valve manufacturing process, characterized in that the manufacturing process comprises the steps of:

s1, material detection: carrying out chemical analysis on the metal casting base material through a chemical analyzer, and detecting whether the sulfur and phosphorus content of the base material reaches a standard or not;

S2, machining a casting: respectively processing the casting base material into corresponding profile modeling through a numerical control lathe and a profiling lathe, and taking the casting base material as a modeling component for standby;

s3, diaphragm pressing: mixing with a rubber rolling mill, automatically slicing with a rotary knife by using an extruder, cooling with water to obtain coarse slices, washing with soap water, putting into a numerical control blanking machine to obtain diaphragm sheets, manually laminating, simultaneously lining with a plurality of layers of nylon mesh cloth and insert screws, finally putting into a rubber hot press for pressurization, and vulcanizing and molding to obtain diaphragms for later use;

s4, lining: firstly, carrying out oil removal, sand blasting and purification treatment on a shell, then coating an adhesive layer on a part of an inner cavity needing lining, manually attaching a rubber sheet on the adhesive layer, putting the integrated shell into a specially-made mould blank, carrying out injection molding and hot pressing molding on an injection molding machine with a corresponding tonnage pressure level, and adopting electric heating and water cooling to adjust the temperature of the mould;

s5, assembling and forming: and assembling and integrating the modeling components through different fasteners according to a drawing system to form the diaphragm valve.

8. The manufacturing process of a manual diaphragm valve according to claim 7, wherein after the assembly of the diaphragm valve in S5, the surface of the diaphragm valve needs to be treated, specifically by a phosphating method, that is, by a pipeline operation, there are 10 phosphating solution tanks, and each two tanks are taken as a process group, and the treatment time is 8 min.

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