CN216867578U

CN216867578U - Manual diaphragm valve hand wheel stop device and diaphragm valve

Info

Publication number: CN216867578U
Application number: CN202122984740.1U
Authority: CN
Inventors: 杨红强
Original assignee: Ningbo Yingkete Precision Machinery Co ltd Shanghai Branch
Current assignee: Ningbo Yingkete Fluid Control Technology Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-07-01
Anticipated expiration: 2031-11-30

Abstract

The utility model discloses a hand-operated diaphragm valve hand wheel limiting device and a diaphragm valve, wherein a hand wheel of a hand wheel mechanism of the hand-operated diaphragm valve hand wheel limiting device is internally provided with a first adjusting channel, a valve rod and an adjusting mechanism are arranged in the first adjusting channel, and the valve rod is provided with a second adjusting channel and an adjusting hole; the adjusting mechanism is characterized in that a third adjusting channel is arranged in an adjusting part of the adjusting mechanism, the adjusting part is arranged in a second adjusting channel, the adjusting part is rotatably connected with the valve rod, the driving part is located in the third adjusting channel, the driving part is in threaded fit connection with the adjusting part, a first connecting hole is formed in the driving part, the limiting part is sleeved outside the valve rod, and a second connecting hole is formed in the limiting part. The hand-operated diaphragm valve hand wheel limiting device can firstly rotate the hand wheel to the position where the valve rod is required to be adjusted, then adjust the moving stroke of the hand wheel by adjusting the limiting piece, and the hand wheel can effectively prevent the diaphragm from being excessively extruded by the valve rod when driving the valve rod to move, so that the operation steps are few, and the operation is simple.

Description

Manual diaphragm valve hand wheel stop device and diaphragm valve

Technical Field

The utility model relates to the field of manual diaphragm valve adjustment, in particular to a hand wheel limiting device of a manual diaphragm valve and the diaphragm valve.

Background

The opening and closing piece of the diaphragm valve is a diaphragm, and the diaphragm separates the inner cavity of the valve body at the lower part from the inner cavity of the cylinder or the valve cover at the upper part, so that parts such as the valve rod, the valve clack and the like above the diaphragm are not corroded by media, and the diaphragm valve has the advantage that the media are not leaked.

The manual diaphragm valve closes the valve through the hand wheel, avoids the diaphragm excessively extruded, leads to diaphragm life to reduce, needs set up limit structure in manual diaphragm valve. The limiting structure can be used for limiting the position of the hand wheel.

However, the existing hand-operated diaphragm valve hand wheel limiting structure is troublesome to operate, and the hand wheel needs to be disassembled firstly and then installed after adjustment.

Therefore, how to provide a hand-operated diaphragm valve handwheel limit structure with few operation steps and simple operation becomes a technical problem to be solved urgently in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel technical scheme of a manual diaphragm valve hand wheel limiting device with few operation steps and simple operation.

According to a first aspect of the utility model, a manual diaphragm valve handwheel limiting device is provided.

The hand wheel limiting device of the manual diaphragm valve comprises a hand wheel mechanism and an adjusting mechanism; wherein the content of the first and second substances,

the hand wheel mechanism comprises a hand wheel and a valve rod, a first adjusting channel is arranged in the hand wheel, the valve rod and the adjusting mechanism are arranged in the first adjusting channel, the valve rod is connected with the hand wheel, a second adjusting channel and an adjusting hole are arranged on the valve rod, the second adjusting channel extends along the length direction of the valve rod, the adjusting hole is arranged on the side wall of the second adjusting channel, and the adjusting hole extends along the length direction of the valve rod;

the adjusting mechanism comprises an adjusting piece, a driving piece, a limiting piece and a first connecting piece, a third adjusting channel is arranged in the adjusting piece, the adjusting piece is arranged in the second adjusting channel, the adjusting piece is connected with the valve rod in a rotating mode, the driving piece is located in the third adjusting channel, the driving piece is connected with the adjusting piece in a threaded fit mode, a first connecting hole is formed in the driving piece, the limiting piece is arranged outside the valve rod in a sleeved mode, the limiting piece corresponds to the adjusting hole in a arranged mode, a second connecting hole is formed in the limiting piece, and the first connecting piece is matched with the first connecting hole, the second connecting hole and the adjusting hole.

Optionally, the hand wheel includes a hand wheel handle and a hand wheel rod for cooperating with the valve cover, and the hand wheel rod is provided with scale marks.

Optionally, the first adjusting channel has an adjusting section and a limiting section, a step surface is provided between the limiting section and the adjusting section, and the limiting member is located in the limiting section.

Optionally, the second adjusting channel is provided with an adjusting part limiting section and a driving part matching section, a step surface is arranged between the adjusting part limiting section and the driving part matching section, and the adjusting part is located in the adjusting part limiting section.

Optionally, the adjusting hole is a kidney-shaped hole.

Optionally, the first connecting piece is a fixing pin.

Optionally, the adjusting mechanism further comprises a second connecting member for connecting the adjusting member and the valve stem.

Optionally, the second connecting piece is a retainer ring, and the retainer ring is disposed in the second adjusting passage.

Optionally, the adjusting mechanism further comprises an adjusting wheel, an adjusting wheel cavity is arranged on the end face of the hand wheel, the adjusting wheel cavity is communicated with the first adjusting channel, the adjusting wheel is arranged in the adjusting wheel cavity, and the adjusting wheel is connected with the adjusting piece.

Optionally, the adjusting mechanism further comprises a third connecting member, and the third connecting member is used for connecting the adjusting wheel and the adjusting member.

Optionally, the third connecting member is a fixing pin.

Optionally, the adjusting mechanism further comprises a ball plunger assembly, and the ball plunger assembly comprises a ball plunger, a spring and a positioning ball;

the ball plunger is installed in the adjusting wheel cavity, the spring and the positioning ball are arranged in the ball plunger, and the adjusting wheel is provided with a positioning hole matched with the positioning ball.

According to a second aspect of the present invention, a diaphragm valve is provided.

The diaphragm valve comprises a valve cover and a manual diaphragm valve hand wheel limiting device; wherein the content of the first and second substances,

the limiting device moving cavity is arranged in the valve cover, the limiting device moving cavity is provided with an opening, one end of the hand wheel extends into the limiting device moving cavity, and the end face of the hand wheel and the end face of the limiting part are arranged opposite to the wall face of the limiting device moving cavity.

Optionally, the hand wheel is in clearance fit with an opening of the movement cavity of the limiting device.

Optionally, the valve cover includes a valve cover body and a limiting cover, the valve cover body and the limiting cover are fixedly connected, the limiting device moving cavity is formed by the valve cover body and the limiting cover, and the end face of the hand wheel and the end face of the limiting part are both arranged opposite to the outer surface of the valve cover body.

The hand-operated diaphragm valve hand wheel limiting device can firstly rotate the hand wheel to the required position of the valve rod, then adjust the moving stroke of the hand wheel by adjusting the limiting piece, and the hand wheel can effectively prevent the diaphragm from being excessively extruded by the valve rod when driving the valve rod to move, so that the operation steps are few, and the operation is simple.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic structural diagram of a manual diaphragm valve handwheel limiting device according to an embodiment of the utility model.

Fig. 2 is a partial structural schematic view of a hand-operated diaphragm valve handwheel limiting device of an embodiment of the utility model.

Fig. 3 is a sectional view taken along line a-a in fig. 2.

Fig. 4 is an exploded view of fig. 2.

Figure 5 is a schematic structural view of an embodiment of a diaphragm valve of the present invention.

The figures are labeled as follows:

a handwheel-1, a first adjusting channel-101, an adjusting section-1011, a limiting section-1012, a handwheel handle-102, a handwheel rod-103, an adjusting wheel cavity-104, a valve rod-2, a second adjusting channel-201, an adjusting part limiting section-2011, a driving part matching section-2012, an adjusting hole-202, an adjusting part-3, a third adjusting channel-300, a driving part-4, a first connecting hole-400, a limiting part-5, a second connecting hole-500, a first connecting part-6, a second connecting part-7, an adjusting wheel-8, a third connecting part-9, a ball plunger component-10, a ball plunger-1001, a spring-1002, a positioning ball-1003, a valve cover-11, a limiting device moving cavity-1101, a valve cover body-1102, a limit cover-1103.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

As shown in fig. 1 to 4, the hand wheel limiting device of the manual diaphragm valve of the present invention comprises a hand wheel mechanism and an adjusting mechanism.

The hand wheel mechanism comprises a hand wheel 1 and a valve rod 2.

A first adjusting channel 101 is arranged in the hand wheel 1, the valve rod 2 and the adjusting mechanism are arranged in the first adjusting channel 101, and the valve rod 2 is connected with the hand wheel 1. The connection between the valve rod 2 and the hand wheel 1 can be realized through threaded connection or buckle connection and other connection modes, so that the hand wheel 1 can drive the valve rod 2 to rotate synchronously. In specific implementation, a connection mode which can prevent the hand wheel 1 and the valve rod 2 from rotating relatively is preferably selected.

The valve rod 2 is provided with a second regulating passage 201 and a regulating hole 202. The second adjustment passage 201 extends along the length of the valve stem 2. An adjustment hole 202 is provided on a side wall of the second adjustment passage 201, and the adjustment hole 202 extends along the length direction of the valve stem 2. The regulation hole 202 communicates with the second regulation passage 201.

The adjusting mechanism comprises an adjusting piece 3, a driving piece 4, a limiting piece 5 and a first connecting piece 6.

A third regulating passage 300 is provided in the regulating member 3. The adjusting piece 3 is arranged in the second adjusting channel 201, and the adjusting piece 3 is rotatably connected with the valve rod 2. The fitting of the adjuster 3 to the second adjustment passage 201 may be a clearance fit so that the adjuster 3 can smoothly perform a rotational movement in the second adjustment passage 201 of the valve stem 2. The connection between the adjusting piece 3 and the valve stem 2 should be such that the adjusting piece 3 is prevented from falling out of the second adjusting passage 201 of the valve stem 2 while the adjusting piece 3 is being rotated in the second adjusting passage 201. Typically, the end of the adjusting member 3 protrudes out of the second adjusting channel 201 so that the operator can easily apply a force to the adjusting member 3.

The driving member 4 is located in the third adjusting channel 300, and the driving member 4 is in threaded fit connection with the adjusting member 3. The driving member 4 is provided with a first coupling hole 400. When the adjusting member 3 rotates in the second adjusting passage 201, the driving member 4 is driven by the adjusting member 3 and moves up and down along the third adjusting passage 300.

The limiting member 5 is sleeved outside the valve rod 2, and the limiting member 5 is disposed corresponding to the adjusting hole 202. The limiting member 5 is provided with a second connecting hole 500. The first link 6 is engaged with the first coupling hole 400, the second coupling hole 500 and the adjusting hole 202. The first connecting member 6 can fix the limiting member 5 on the driving member 4, and the driving member 4 drives the limiting member 5 to move along the extending direction of the adjusting hole 202.

When the hand-operated diaphragm valve hand wheel limiting device is used, the hand wheel 1 is rotated firstly, the hand wheel 1 drives the valve rod 2 to rotate in the valve cover, so that the valve rod 2 drives the diaphragm connecting piece to move, and the opening degree of the diaphragm valve is adjusted. When the hand wheel 1 moves to a required opening position of the diaphragm valve relative to the valve cover, force is applied to the adjusting piece 3, so that the adjusting piece 3 rotates in the second adjusting channel 201 of the valve rod 2. As the adjusting part 3 rotates, the position of the driving part 4 relative to the adjusting part 3 and within the second adjusting channel 201 changes, i.e. the driving part 4 moves within the second adjusting channel 201. When the driving member 4 moves, the limiting member 5 connected with the driving member 4 through the first connecting member 6 also moves along with the driving member 4, and the moving stroke of the first connecting member 6 is limited by the adjusting hole 202. When the limiting member 5 moves to abut against the valve cover, the limiting member 5 cannot move any more, and the driving member 4 and the adjusting member 3 also stop moving. And the limit adjustment of the hand wheel 1 of the manual diaphragm valve is finished. When the hand wheel 1 drives the valve rod 2 to move, the moving stroke of the hand wheel 1 is limited by the limiting part 5, and the diaphragm can be effectively prevented from being excessively extruded by the valve rod 2.

When the valve leakage occurs and the valve needs to be completely closed, the hand wheel 1 is rotated reversely, the hand wheel 1 drives the valve rod 2 to rotate in the valve cover, and the valve rod 2 drives the diaphragm connecting piece to move towards the direction away from the diaphragm. When the hand wheel 1 drives the valve rod 2 to move to the limit position, force is applied to the adjusting piece 3, so that the adjusting piece 3 rotates reversely in the second adjusting channel 201 of the valve rod 2. With the rotation of the adjustment member 3, the drive member 4 moves in the second adjustment channel 201 in a direction away from the diaphragm. When the driving member 4 moves, the limiting member 5 connected with the driving member 4 through the first connecting member 6 also moves along with the driving member 4 until the limiting member 5 moves to the limit position. Then, the hand wheel 1 is rotated in the positive direction, and the hand wheel 1 drives the valve rod 2 to move towards the direction close to the diaphragm until the valve is closed. And applying force to the adjusting part 3, so that the adjusting part 3 rotates in the second adjusting channel 201 of the valve rod 2 in the forward direction until the limiting part 5 moves to abut against the valve cover, and the adjusting part 3, the driving part 4 and the limiting part 5 all stop moving. At this point, the manual diaphragm valve is completely closed.

The hand-operated diaphragm valve hand wheel limiting device can firstly rotate the hand wheel 1 until the valve rod 2 is adjusted to a required position, then adjust the moving stroke of the hand wheel 1 by adjusting the limiting piece 5, and the hand wheel 1 can effectively prevent a diaphragm from being excessively extruded by the valve rod 2 when driving the valve rod 2 to move, so that the operation steps are few, and the operation is simple.

In one embodiment of the hand operated diaphragm valve handwheel limiting device of the present disclosure, the handwheel 1 includes a handwheel stem 102 and a handwheel stem 103 for mating with a valve cover. The hand wheel rod 103 is provided with scale marks. The operator can easily apply force to the handle 102. The scale marks on the handwheel rod 103 can be used for acquiring the position of the handwheel 1 relative to the valve cover, so that the opening degree of the manual diaphragm valve can be accurately adjusted.

In specific implementation, the height of the hand wheel lever 103 can be controlled as follows: when the valve is closed, the distance between the hand wheel handle 102 and the valve cover is set to be matched with the size of fingers of an adult, so that the effect of ensuring the activity space of an operator and reducing the height of the manual diaphragm valve is achieved.

In one embodiment of the manual diaphragm valve handwheel stop of the present disclosure, the first adjustment channel 101 has an adjustment segment 1011 and a stop segment 1012. A step surface is arranged between the limiting section 1012 and the adjusting section 1011, and the limiting part 5 is positioned in the limiting section 1012. The step surface between the limiting section 1012 and the adjusting section 1011 can limit the limiting part 5, so that the use stability of the manual diaphragm valve is improved.

In practical implementation, the inner diameter of the adjusting section 1011 can be set smaller than the inner diameter of the limiting section 1012, so as to control the limiting member 5 more reliably.

In one embodiment of the manual diaphragm valve handwheel limiting device of the present disclosure, the second adjustment channel 201 has an adjustment member limiting segment 2011 and a drive member mating segment 2012. A step surface is arranged between the adjusting part limiting section 2011 and the driving part matching section 2012, and the adjusting part 3 is positioned in the adjusting part limiting section 2011. The step face between spacing section 2011 of regulating part and the driving piece cooperation section 2012 can play the spacing effect of regulating part 3 to the stability that manual diaphragm valve used has been improved.

In specific implementation, the inner diameter of the adjusting part limiting section 2011 can be set to be larger than the inner diameter of the driving part matching section 2012, so that the adjusting part 3 can be controlled more reliably. In addition, the fitting between the adjusting part 3 and the adjusting part limiting section 2011 can be clearance fit, and the fitting between the driving part 4 and the driving part fitting section 2012 can be sliding fit or clearance fit.

In one embodiment of the hand-operated diaphragm valve hand wheel limiting device of the present disclosure, in order to more reliably control the movement of the first connecting member 6 and the limiting member 5, the adjusting hole 202 is a kidney-shaped hole. The adjustment apertures 202 may be provided in pairs.

In one embodiment of the hand-operated diaphragm valve hand wheel limiting device of the present disclosure, in order to improve the smoothness of the movement of the first connecting piece 6 in the adjusting hole 202, the first connecting piece 6 is a fixed pin.

In one embodiment of the hand-operated diaphragm valve handwheel limiting device of the present disclosure, the adjustment mechanism further comprises a second connector 7. The second connecting piece 7 is used for connecting the adjusting piece 3 and the valve rod 2. The second connecting element 7 can be, for example, a locking ring or a locking spring arranged in the second adjusting channel 201, or the second connecting element 7 can be a fixing pin for locking the end of the adjusting element 3 to the handwheel 1.

Further, the second connecting member 7 is a retainer ring, and the retainer ring is disposed in the second regulating passage 201. The retainer ring secures the adjusting member 3 in a rotational movement relative to the valve stem 2 while positioning the adjusting member 3 in the second adjustment passage 201 of the valve stem 2. In specific implementation, the retainer ring may be fixed on an inner wall surface of the second adjusting passage 201 of the valve rod 2, and a seal ring may be disposed between the retainer ring and the adjusting member 3.

In one embodiment of the hand-operated diaphragm valve handwheel limiting device of the present disclosure, the adjustment mechanism further includes an adjustment wheel 8. An adjusting wheel cavity 104 is arranged on the end face of the handwheel 1, and the adjusting wheel cavity 104 is communicated with the first adjusting channel 101. The regulating wheel 8 is arranged in the regulating wheel cavity 104, and the regulating wheel 8 is connected with the regulating member 3. The adjusting wheel 8 is arranged to facilitate the force application of an operator to the adjusting part 3 more conveniently, so that the use convenience of the manual diaphragm valve is improved.

Further, the adjusting mechanism further comprises a third connecting member 9, and the third connecting member 9 is used for connecting the adjusting wheel 8 and the adjusting member 3. The third connecting member 9 may be, for example, a bolt, a fixing pin, or the like.

Furthermore, in order to improve the convenience of maintenance of the manual diaphragm valve, the third connecting member 9 is a fixing pin.

Further, the adjusting mechanism further comprises a ball plunger assembly 10, and the ball plunger assembly 10 comprises a ball plunger 1001, a spring 1002 and a positioning ball 1003.

A ball plunger 1001 is mounted in the adjustment wheel cavity 104, and a spring 1002 and a detent ball 1003 are both disposed in the ball plunger 1001. The adjusting wheel 8 is provided with a positioning hole matched with the positioning bead 1003.

The ball plunger assembly 10 is arranged to effectively prevent the regulating wheel 8 from being operated by mistake.

During specific implementation, the adjusting wheel 8 can be fixedly connected with a positioning plate, and the positioning hole is located on the positioning plate.

To more clearly illustrate the manual diaphragm valve handwheel limiting device of the present invention, the embodiment shown in fig. 1 will be described as follows:

the hand-operated diaphragm valve hand wheel limiting device comprises a hand wheel mechanism and an adjusting mechanism.

The handwheel mechanism comprises a handwheel 1 and a valve stem 2.

The handwheel 1 also includes a handwheel handle 102 and a handwheel stem 103 for mating with the valve cover. The handwheel rod 103 is provided with scale marks. An adjusting wheel cavity 104 is arranged on the end face of the handwheel 1, the adjusting wheel cavity 104 is communicated with the first adjusting channel 101, and the adjusting wheel cavity 104 is positioned on the handwheel handle 102.

A first adjusting channel 101 penetrating through a hand wheel handle 102 and a hand wheel rod 103 is arranged in the hand wheel 1, the valve rod 2 and the adjusting mechanism are arranged in the first adjusting channel 101, and the valve rod 2 is connected with the hand wheel 1 in a clamping mode. The first adjustment channel 101 has an adjustment section 1011 and a limit section 1012. The inner diameter of the adjustment section 1011 is set smaller than the inner diameter of the stopper section 1012 to form a stepped surface between the stopper section 1012 and the adjustment section 1011.

The valve rod 2 is provided with a second regulating passage 201 and a regulating hole 202. The second adjustment passage 201 extends along the length of the valve stem 2. The second adjustment channel 201 has an adjustment element retaining portion 2011 and a drive element mating portion 2012. The inner diameter of the adjuster limiting section 2011 is larger than the inner diameter of the driver mating section 2012, so that a step surface is formed between the adjuster limiting section 2011 and the driver mating section 2012. The adjustment hole 202 is provided on a side wall of the driver fitting section 2012, and the adjustment hole 202 extends along the length direction of the valve stem 2. The regulation hole 202 communicates with the second regulation passage 201. The adjustment holes 202 are kidney-shaped holes, and the adjustment holes 202 are provided in pairs.

The adjusting mechanism comprises an adjusting piece 3, a driving piece 4, a limiting piece 5, a first connecting piece 6, a second connecting piece 7, an adjusting wheel 8, a third connecting piece 9 and a ball plunger assembly 10.

Regulating part 3 sets up in the spacing section 2011 of regulating part, and regulating part 3 rotates with valve rod 2 to be connected. A third regulating passage 300 is provided in the regulating member 3. The second connecting member 7 is a retainer ring provided in the second regulating passage 201 for connecting the regulating member 3 and the valve stem 2.

The driving member 4 is located in the third adjusting channel 300, and the driving member 4 is in threaded fit connection with the adjusting member 3. The driving member 4 is provided with a first coupling hole 400.

The limiting member 5 is sleeved outside the valve rod 2, and the limiting member 5 is located in the limiting section 1012. The limiting member 5 is disposed corresponding to the adjusting hole 202. The limiting member 5 is provided with a second connecting hole 500.

The first connecting piece 6 is a fixed pin. The first link 6 is engaged with the first coupling hole 400, the second coupling hole 500, and the adjusting hole 202.

The regulating wheel 8 is arranged in the regulating wheel cavity 104, and the regulating wheel 8 is connected with the regulating part 3 through a third connecting part 9. The third connecting piece 9 is a fixed pin.

The ball plunger assembly 10 includes a ball plunger 1001, a spring 1002, and a locating ball 1003. A ball plunger 1001 is mounted in the adjustment wheel cavity 104, and a spring 1002 and a detent ball 1003 are both disposed in the ball plunger 1001. The adjusting wheel 8 is provided with a positioning hole matched with the positioning bead 1003.

When the hand-operated diaphragm valve hand wheel limiting device is used, the hand wheel 1 is rotated firstly, the hand wheel 1 drives the valve rod 2 to rotate in the valve cover, so that the valve rod 2 drives the diaphragm connecting piece to move, and the opening degree of the hand-operated diaphragm valve is accurately judged through the scale marks on the hand wheel rod 103. When the hand wheel 1 moves to a required opening position of the diaphragm valve relative to the valve cover, force is applied to the adjusting wheel 8 and the resistance of the ball plunger assembly 10 is overcome, so that the adjusting piece 3 rotates in the second adjusting channel 201 of the valve rod 2. With the rotation of the adjustment wheel 8, the driver 4 moves in the second adjustment channel 201. When the driving member 4 moves, the limiting member 5 connected with the driving member 4 through the first connecting member 6 also moves along with the driving member 4. When the limiting member 5 moves to abut against the valve cover, the limiting member 5 cannot move any more, and the driving member 4 and the adjusting member 3 also stop moving. And the limit adjustment of the hand wheel 1 of the manual diaphragm valve is finished. When the hand wheel 1 drives the valve rod 2 to move, the moving stroke of the hand wheel 1 is limited by the limiting part 5, and the diaphragm can be effectively prevented from being excessively extruded by the valve rod 2.

When the valve is leaked and the valve needs to be completely closed, the hand wheel 1 is rotated reversely, the hand wheel 1 drives the valve rod 2 to rotate in the valve cover, and the valve rod 2 drives the diaphragm connecting piece to move towards the direction far away from the diaphragm. When the hand wheel 1 drives the valve rod 2 to move to the limit position, force is applied to the adjusting wheel 8 and the resistance of the ball head plunger assembly 10 is overcome, so that the adjusting piece 3 rotates reversely in the second adjusting channel 201 of the valve rod 2. With the rotation of the adjustment wheel 8, the driver 4 moves in the second adjustment channel 201 in a direction away from the membrane. When the driving member 4 moves, the limiting member 5 connected with the driving member 4 through the first connecting member 6 also moves along with the driving member 4 until the limiting member 5 moves to the limit position. Then, the hand wheel 1 is rotated in the forward direction, and the hand wheel 1 drives the valve rod 2 to move towards the direction close to the diaphragm until the valve is closed. And then, force is applied to the adjusting wheel 8, so that the adjusting part 3 rotates in the second adjusting channel 201 of the valve rod 2 in the forward direction until the limiting part 5 moves to abut against the valve cover, and the adjusting part 3, the driving part 4 and the limiting part 5 stop moving. At this point, the manual diaphragm valve is completely closed.

As shown in fig. 5, the present invention also provides a diaphragm valve comprising a valve cover 11 and a manual diaphragm valve handwheel limiting device of the present invention.

A stopper movement chamber 1101 is provided in the valve cover 11, and the stopper movement chamber 1101 has an opening. One end of the hand wheel 1 extends into the limiting device moving cavity 1101, and the end face of the hand wheel 1 and the end face of the limiting part 5 are both arranged opposite to the wall face of the limiting device moving cavity 1101.

By rotating the hand wheel 1, the hand wheel 1 can be abutted against the wall surface of the moving cavity 1101 of the limiting device, so that the purpose of controlling the moving stroke of the hand wheel 1 is achieved.

By rotating the adjusting member 3, the end surface of the limiting member 5 abuts against the wall surface of the limiting device moving cavity 1101, so as to control the moving stroke of the limiting member 5.

The valve stem 2 is screw-coupled with the bonnet 11 so that the valve stem 2 can move within the bonnet 11 when the valve stem 2 is driven to rotate.

According to the diaphragm valve, after the hand wheel 1 is rotated to the required position of the valve rod 2, the movement stroke of the hand wheel 1 is adjusted by adjusting the limiting piece 5, the hand wheel 1 can effectively prevent the diaphragm from being excessively extruded by the valve rod 2 when driving the valve rod 2 to move, the operation steps are few, and the operation is simple.

In one embodiment of the diaphragm valve of the present disclosure, the handwheel 1 is clearance fit with the opening of the stop device movement chamber 1101. The matching mode between the hand wheel 1 and the valve cover 11 can more conveniently rotate the hand wheel 1, and the convenience of operation is improved.

In one embodiment of the diaphragm valve of the present disclosure, to more conveniently service the diaphragm valve, the bonnet 11 includes a bonnet body 1102 and a retaining cap 1103. The valve cover body 1102 is fixedly connected with the limiting cover 1103. The fixed connection between the valve cover body 1102 and the limiting cover 1103 can be realized through a bolt connection mode, a welding mode or the like.

The stopper moving chamber 1101 is constituted by a bonnet body 1102 and a stopper cover 1103. The end face of the handwheel 1 and the end face of the limiting piece 5 are both arranged opposite to the outer surface of the valve cover body 1102.

To more clearly illustrate the diaphragm valve of the present invention, the embodiment shown in fig. 5 is described below:

the diaphragm valve comprises a valve cover 11 and a hand wheel limiting device of the manual diaphragm valve.

The bonnet 11 includes a bonnet body 1102 and a restraining cap 1103. The bonnet body 1102 and the retaining cap 1103 are bolted together. The bonnet body 1102 and the restraining cap 1103 form a restraining device moving chamber 1101, and the restraining device moving chamber 1101 has an opening.

The handwheel mechanism comprises a handwheel 1 and a valve stem 2.

The handwheel 1 comprises a handwheel handle 102 and a handwheel stem 103 for cooperating with the valve cover. The hand wheel rod 103 is provided with scale marks. An adjusting wheel cavity 104 is arranged on the end face of the handwheel 1, the adjusting wheel cavity 104 is communicated with the first adjusting channel 101, and the adjusting wheel cavity 104 is positioned on the handwheel handle 102. The hand wheel rod 103 extends into the limiting device moving cavity 1101, and the end face of the hand wheel rod 103 is arranged opposite to the outer surface of the valve cover body 1102. The hand wheel lever 103 is clearance fitted with the opening of the stopper movement chamber 1101.

A first adjusting channel 101 is arranged in the handwheel 1, and the first adjusting channel 101 penetrates through the handwheel handle 102 and the handwheel rod 103. The valve rod 2 and the adjusting mechanism are arranged in the first adjusting channel 101, and the valve rod 2 is clamped with the hand wheel 1. The first adjustment channel 101 has an adjustment section 1011 and a limit section 1012. The inner diameter of the adjustment section 1011 is set smaller than the inner diameter of the stopper section 1012 to form a stepped surface between the stopper section 1012 and the adjustment section 1011.

The valve rod 2 is provided with a second regulating passage 201 and a regulating hole 202. The second adjustment passage 201 extends along the length of the valve stem 2. Second adjustment channel 201 has an adjustment element retention section 2011 and a drive element mating section 2012. The inner diameter of the adjuster limiting section 2011 is larger than the inner diameter of the driver mating section 2012, so that a step surface is formed between the adjuster limiting section 2011 and the driver mating section 2012. The adjustment hole 202 is provided on a side wall of the driver fitting section 2012, and the adjustment hole 202 extends along the length direction of the valve stem 2. The regulation hole 202 communicates with the second regulation passage 201. The adjustment holes 202 are kidney-shaped holes, and the adjustment holes 202 are provided in pairs.

The limiting member 5 is sleeved outside the valve rod 2, and the limiting member 5 is located in the limiting section 1012. The limiting member 5 is disposed corresponding to the adjusting hole 202. The limiting member 5 is provided with a second connecting hole 500. The end surface of the stopper 5 is disposed opposite to the outer surface of the bonnet body 1102.

The first connecting piece 6 is a fixed pin. The first link 6 is engaged with the first coupling hole 400, the second coupling hole 500 and the adjusting hole 202.

When the diaphragm valve is used, the hand wheel 1 is firstly rotated, the hand wheel 1 drives the valve rod 2 to rotate in the valve cover 11, so that the valve rod 2 drives the diaphragm connecting piece to move, and the opening degree of the manual diaphragm valve is accurately judged through the scale marks on the hand wheel rod 103. When the hand wheel 1 moves to a required opening position of the diaphragm valve relative to the valve cover 11, force is applied to the adjusting wheel 8 and the resistance of the ball plunger assembly 10 is overcome, so that the adjusting piece 3 rotates in the second adjusting channel 201 of the valve rod 2. With the rotation of the adjustment wheel 8, the driver 4 moves within the second adjustment channel 201. When the driving member 4 moves, the limiting member 5 connected with the driving member 4 through the first connecting member 6 also moves along with the driving member 4. When the stopper 5 moves to abut against the surface of the bonnet body 1102, the stopper 5 cannot move any more, and the driving member 4 and the adjusting member 3 also stop moving. And the limit adjustment of the hand wheel 1 of the manual diaphragm valve is finished. When the hand wheel 1 drives the valve rod 2 to move, the moving stroke of the hand wheel 1 is limited by the limiting part 5, and the diaphragm can be effectively prevented from being excessively extruded by the valve rod 2.

When the valve leakage occurs and the valve needs to be completely closed, the hand wheel 1 is rotated reversely, the hand wheel 1 drives the valve rod 2 to rotate in the valve cover 11, and the valve rod 2 drives the diaphragm connecting piece to move towards the direction away from the diaphragm. When the hand wheel 1 drives the valve rod 2 to move to the limit position, force is applied to the adjusting wheel 8 and the resistance of the ball head plunger assembly 10 is overcome, so that the adjusting piece 3 rotates reversely in the second adjusting channel 201 of the valve rod 2. With the rotation of the adjustment wheel 8, the driver 4 moves in the second adjustment channel 201 in a direction away from the membrane. When the driving member 4 moves, the limiting member 5 connected with the driving member 4 through the first connecting member 6 also moves along with the driving member 4 until the limiting member 5 moves to the limit position. Then, the hand wheel 1 is rotated in the forward direction, the hand wheel 1 drives the valve rod 2 to move towards the direction close to the diaphragm, and the valve is closed when the hand wheel rod 103 abuts against the outer surface of the valve cover body 1102. And then, force is applied to the adjusting wheel 8, so that the adjusting part 3 rotates in the second adjusting channel 201 of the valve rod 2 in the forward direction until the limiting part 5 moves to abut against the outer surface of the valve cover body 1102, and the adjusting part 3, the driving part 4 and the limiting part 5 all stop moving. At this point, the manual diaphragm valve is completely closed.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. A hand wheel limiting device of a manual diaphragm valve is characterized by comprising a hand wheel mechanism and an adjusting mechanism; wherein the content of the first and second substances,

2. The manual diaphragm valve handwheel limiting device of claim 1, wherein the handwheel comprises a handwheel handle and a handwheel rod for matching with the valve cover, and scale marks are arranged on the handwheel rod.

3. The manual diaphragm valve hand wheel limiting device of claim 1, wherein the first adjustment channel has an adjustment segment and a limiting segment, a step surface is provided between the limiting segment and the adjustment segment, and the limiting member is located in the limiting segment.

4. The manual diaphragm valve handwheel limiting device of claim 1, wherein the second adjustment channel has an adjustment member limiting segment and a driver member engaging segment, a step surface is provided between the adjustment member limiting segment and the driver member engaging segment, and the adjustment member is located in the adjustment member limiting segment.

5. The manual diaphragm valve handwheel limiting device of claim 1, wherein the adjustment aperture is a kidney-shaped aperture.

6. The manual diaphragm valve handwheel limiting device of claim 1, wherein the first connection member is a fixed pin.

7. The manual diaphragm valve handwheel limiting device of claim 1, wherein the adjustment mechanism further comprises a second connector for connecting the adjustment member and the valve stem.

8. The manual diaphragm valve handwheel stop device of claim 7, wherein the second connector is a retainer ring, and the retainer ring is disposed within the second adjustment channel.

9. The manual diaphragm valve hand wheel limiting device according to any one of claims 1 to 8, wherein the adjusting mechanism further comprises an adjusting wheel, an adjusting wheel cavity is arranged on an end surface of the hand wheel, the adjusting wheel cavity is communicated with the first adjusting channel, the adjusting wheel is arranged in the adjusting wheel cavity, and the adjusting wheel is connected with the adjusting piece.

10. The manual diaphragm valve handwheel stop device of claim 9, wherein the adjustment mechanism further comprises a third connection for connecting the adjustment wheel and the adjustment member.

11. The manual diaphragm valve handwheel limiting device of claim 10, wherein the third connection member is a fixed pin.

12. The manual diaphragm valve handwheel limiting device of claim 9, wherein the adjustment mechanism further comprises a ball plunger assembly comprising a ball plunger, a spring, and a positioning bead;

13. A diaphragm valve comprising a valve cover and a manual diaphragm valve handwheel stop device of any one of claims 1 to 12; wherein the content of the first and second substances,

14. The diaphragm valve of claim 13 where the hand wheel is clearance fit with the opening of the stop means travel cavity.

15. The diaphragm valve of claim 13 where the valve cover comprises a valve cover body and a retaining cap, where the valve cover body and the retaining cap are fixedly connected, the retaining device movement chamber is formed by the valve cover body and the retaining cap, and the end face of the handwheel and the end face of the retaining member are both disposed opposite to the outer surface of the valve cover body.