CN216743090U

CN216743090U - Pneumatic diaphragm valve with limiting and opening and closing indicating mechanism

Info

Publication number: CN216743090U
Application number: CN202123077009.7U
Authority: CN
Inventors: 谭冬阳; 李满然
Original assignee: Wenzhou Nuomeng Technology Co ltd
Current assignee: Wenzhou Nuomeng Technology Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-06-14
Anticipated expiration: 2031-12-08

Abstract

The utility model relates to a pneumatic diaphragm valve with a limiting and opening and closing indicating mechanism, which is characterized in that the top of a pneumatic shell is provided with a limiting sleeve, and the limiting sleeve is connected with a dynamic seal which can be adjusted up and down; the driving medium can drive the piston plate to move downwards to close the diaphragm through the pneumatic pipe head, and the piston plate can move upwards along the pneumatic shell under the driving of the resetting mechanism to open the diaphragm and be in abutting contact with the limiting sleeve. The beneficial effects of the utility model are that set up the stop collar through the top at pneumatic casing, when the opening degree of diaphragm needs to be controlled, alright adjust from top to bottom the stop collar, control the length that the stop collar was arranged in pneumatic casing and realize the regulation control of diaphragm opening degree. Secondly, an opening and closing indicating mechanism is additionally arranged on the limiting sleeve, and the opening and closing indicating mechanism can be synchronously driven to send opening or closing signals when the diaphragm is opened by the up-and-down displacement of the piston plate along the pneumatic shell, so that the valve is convenient to automatically control.

Description

Pneumatic diaphragm valve with limiting and opening and closing indicating mechanism

Technical Field

The utility model relates to a valve, more specifically the pneumatic diaphragm valve with spacing and start-stop indicating mechanism that says so relates to, mainly is applied to valve production field.

Background

Diaphragm valves are fluid stop valves that use a diaphragm as an opening and closing member to close a flow passage, stop fluid, and separate an inner cavity of a valve body from an inner cavity of a bonnet.

Although the existing pneumatic diaphragm valve can realize the automatic control of the opening and closing of the valve after the pneumatic head is additionally arranged, the existing pneumatic diaphragm valve is influenced by the sealing performance requirement of the pneumatic head, and a limiting mechanism or an opening and closing indicating mechanism of the valve cannot be arranged on the pneumatic head, so that the opening degree of the diaphragm valve cannot be adjusted or indicated when the valve is opened and closed, and the service performance of the valve and the automatic control of the valve are influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a pneumatic diaphragm with a limiting and opening and closing indicating mechanism, which can not only add a limiting mechanism on a pneumatic head to realize the adjustment of the opening and closing of a valve; meanwhile, an opening and closing indicating mechanism can be additionally arranged, so that opening and closing signals are correspondingly sent out when the valve is opened and closed, and the automatic control of the valve is facilitated.

In order to solve the technical problems, the technical scheme adopted by the utility model is that the pneumatic diaphragm valve with the limiting and opening and closing indicating mechanism comprises a valve body, a valve cover, a diaphragm, a valve rod and a pneumatic head, wherein the pneumatic head comprises a pneumatic shell and a piston plate, one end of the valve rod passes through the valve cover to be connected with the diaphragm, and the other end of the valve rod is arranged in the pneumatic shell to be connected with the piston plate; the side wall of the pneumatic shell is provided with a pneumatic tube head, the piston plate is arranged in the pneumatic shell and is positioned below the pneumatic tube head, the top of the pneumatic shell is provided with a limiting sleeve, and the limiting sleeve is in movable sealing connection with the pneumatic shell in a vertically adjustable manner; the driving medium can drive the piston plate to move downwards to close the diaphragm through the pneumatic pipe head, and the piston plate can move upwards along the pneumatic shell under the driving of the resetting mechanism to open the diaphragm and be in abutting contact with the limiting sleeve.

Preferably, a limiting hole is formed in the limiting sleeve, a limiting rod is arranged above the piston plate and inserted into the limiting hole to be matched with the peripheral side wall of the limiting hole in a dynamic sealing manner, and the length of the limiting rod is greater than the stroke of the up-and-down displacement of the piston plate.

Preferably, the reset mechanism is a reset spring, one end of the reset spring, which is sleeved outside the valve rod, is pressed and matched with the valve cover, and the other end of the reset spring is pressed and contacted with the bottom end face of the piston plate.

Preferably, the resetting mechanism is an air inlet pipe head, and the air inlet pipe head is arranged on the outer side wall of the valve cover and communicated with the pneumatic shell.

Preferably, the upper end surface and the inner side wall of the limiting sleeve are provided with mutually connected arc-shaped grooves, one end of each arc-shaped groove is communicated with the outside, and the other end of each arc-shaped groove is communicated with a limiting hole in the limiting sleeve.

Preferably, an opening and closing indicating mechanism is arranged above the pneumatic shell, and the opening and closing indicating mechanism is fixed with the limiting sleeve and is in linkage connection with the limiting rod.

Preferably, a containing cavity is arranged in the limiting sleeve and communicated with the limiting hole to enable two ends of the limiting sleeve to be communicated; a connecting head is fixed in the inner thread of the containing cavity of the limiting sleeve, and the opening and closing indicating mechanism is fixed with the connecting head in a sealing clamping way.

Preferably, the outer side wall of the top end of the connecting head is provided with a sealing groove and a clamping groove, the opening and closing indicating mechanism is provided with a fixing hole, the peripheral side wall of the opening and closing indicating mechanism is provided with a locking hole communicated with the fixing hole, and the locking hole is inserted into the locking hole through a bolt and is arranged in the clamping groove of the connecting head so that the opening and closing indicating mechanism is fixedly connected with the connecting head in a sealing mode.

Preferably, the open-close indicating mechanism comprises a shell, and the fixing hole and the locking hole are both arranged below the shell, so that the shell is sleeved outside the coupling head and is fixedly connected with the clamping groove of the coupling head through a bolt.

Preferably, an upper limit switch, a lower limit switch and a contact rod are further arranged in the shell, two contact blocks are arranged at the upper end of the contact rod at intervals, and the lower end of the contact rod is inserted into the limit sleeve and is in linkage connection with the limit rod above the piston plate.

The beneficial effects of the utility model are that set up the stop collar through the top at pneumatic casing, piston plate atress displacement downwards when pneumatic tube head connects compressed gas and input pneumatic casing in to order about the diaphragm closure and close the valve. After the compressed gas in the pneumatic shell is exhausted from the pneumatic shell, the piston plate can be driven by the reset mechanism to move upwards along the pneumatic shell to open the diaphragm and abut against the limiting sleeve. Therefore, when the opening degree of the diaphragm needs to be controlled, the limiting sleeve can be adjusted up and down, and the length of the limiting sleeve arranged in the pneumatic shell is controlled to realize the adjustment and control of the opening degree of the diaphragm.

Drawings

FIG. 1 is a cross-sectional structure view of a pneumatic diaphragm valve with a limiting and opening/closing indicating mechanism according to an embodiment of the present invention

FIG. 2 is a bottom perspective view of the embodiment of the present invention

Figure 3 is a top perspective structure view of the spacing sleeve in the embodiment of the utility model

FIG. 4 is a perspective view of a coupling head according to an embodiment of the present invention

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1-4, the utility model relates to a pneumatic diaphragm valve with a limiting and opening/closing indicating mechanism, which comprises a valve body 1, a valve cover 2, a diaphragm 3, a valve rod 4 and a pneumatic head 5, wherein the pneumatic head 5 comprises a pneumatic shell 51 and a piston plate 52, one end of the valve rod 4 passes through the valve cover 2 and is connected with the diaphragm 3, and the other end is connected with the piston plate 52 in the pneumatic shell 51; a pneumatic tube head 53 is arranged on the side wall of the pneumatic shell 51, the piston plate 52 is arranged in the pneumatic shell 51 and is positioned below the pneumatic tube head 53, a limiting sleeve 6 is arranged at the top of the pneumatic shell 51, and the limiting sleeve 6 is connected with the pneumatic shell 51 in a movable sealing manner capable of being adjusted up and down; the drive medium via the pneumatic nipple 53 drives the piston plate 52 to displace downwards to close the diaphragm 3 and, under the drive of the reset mechanism 7, the piston plate 52 is driven to displace upwards along the pneumatic housing 51 to open the diaphragm 3 and to come into pressing contact with the stop collar 6. By providing a stop collar 6 at the top of the pneumatic housing 51, the piston plate 52 is forced to displace downwards when the pneumatic nipple 53 is connected to compressed gas and fed into the pneumatic housing 51, thereby forcing the diaphragm 3 to close the valve. When the compressed gas in the pneumatic housing 51 is exhausted from the pneumatic housing 51, the piston plate 52 is driven by the reset mechanism 7 to displace upwards along the pneumatic housing 51 to open the diaphragm 3 and press against the stop sleeve 6. Therefore, when the opening degree of the diaphragm 3 needs to be controlled, the limiting sleeve 6 can be adjusted up and down, so that the length of the limiting sleeve 6 arranged in the pneumatic shell 51 is controlled to realize the adjustment and control of the opening degree of the diaphragm 3, and the use requirements in different pipeline systems are met.

In order to prevent the dislocation when the piston plate 52 moves up and down to open and close the diaphragm 3 under the driving of the driving medium and the reset mechanism 7, which affects the opening and closing of the valve, a limiting hole 61 is provided in the limiting sleeve 6, a limiting rod 54 is provided above the piston plate 52 and inserted into the limiting hole 61 to be in dynamic sealing fit with the peripheral wall of the limiting hole 61, and the length of the limiting rod 54 is greater than the stroke of the piston plate 52 moving up and down. Through set up spacing hole 61 in stop collar 6 to make setting up gag lever post 54 in piston plate 52 top insert spacing hole 61, like this when the in-process of piston plate 52 displacement from top to bottom, gag lever post 54 and valve rod 4 can carry on spacingly to piston plate 52 upper and lower both ends, alright prevent effectively that piston plate 52 from taking place the dislocation when opening and closed diaphragm 3 from the displacement from top to bottom, guarantee the opening and the closure performance of diaphragm 3.

In order to facilitate the opening of the diaphragm 3, the return mechanism 7 is a return spring 71, one end of the return spring 71 is sleeved outside the valve rod 4 and is in press fit with the valve cover 2, and the other end of the return spring is in press fit with the bottom end surface of the piston plate 52. After the driving medium enters the pneumatic housing 51 through the pneumatic pipe head 53 to drive the piston plate 52 to displace downwards to close the diaphragm 3, and after the driving medium in the pneumatic housing 51 is exhausted, the return spring 71 can drive the piston plate 52 to displace upwards and open the diaphragm 3 by using the elastic force of the return spring, so that the opening and closing performance of the valve is ensured.

Of course, the return spring 71 may not be provided in the pneumatic housing 51, and a more responsive driving medium may be used to drive the piston plate 52 to displace upward to open the diaphragm 3, for example, the return mechanism 7 is provided as an air inlet pipe head 72, and the air inlet pipe head 72 is provided on the outer side wall of the valve cover 2 and is communicated with the pneumatic housing 51. By arranging the air inlet pipe head 72, a driving medium can be connected to the air inlet pipe head 72, and when the diaphragm 3 needs to be opened, the driving medium in the pneumatic pipe head 53 is closed, so that the driving medium in the air inlet pipe head 72 enters the pneumatic housing 51 to drive the piston plate 52 to displace upwards to open the diaphragm 3. When the diaphragm 3 needs to be closed to close the valve, the driving medium in the air inlet pipe head 72 is cut off, and the driving medium in the pneumatic pipe head 53 is opened to drive the piston plate 52 to displace downwards along the pneumatic housing 51 to drive the diaphragm 3 to open. In the actual use process, the switching of the driving media in the pneumatic pipe head 53 and the air inlet pipe head 72 can be controlled through the electromagnetic valve, so that the automatic control is convenient.

Because the limit rod 54 is inserted into the limit hole 61 of the limit sleeve 6, in order to prevent the driving medium from leaking into the limit sleeve 6 (generally, compressed air), a sealing ring is arranged at the joint of the limit rod 54 and the limit hole 61, but the sealing ring is arranged to enable more or less compressed air to enter the limit hole 61 of the limit sleeve 6 when the limit rod 54 ascends and descends along with the piston plate 52, in order to prevent the compressed air from causing resistance to the ascending and descending of the piston plate 52, the upper end surface and the inner side wall of the limit sleeve 6 are provided with mutually connected arc-shaped grooves 62, one end of each arc-shaped groove 62 is communicated with the outside, and the other end of each arc-shaped groove 62 is communicated with the limit hole 61 arranged in the limit sleeve 6. By arranging the arc-shaped groove 62, compressed air leaked through the joint of the limiting rod 54 and the limiting hole 61 can be discharged, the internal normal air pressure of the limiting sleeve 6 is ensured, and the influence on the ascending and descending of the limiting rod 54 caused by overhigh air pressure in the limiting sleeve 6 is avoided.

In order to facilitate the automatic control of the valve, an opening and closing indicating mechanism 8 is arranged above the pneumatic shell 51, and the opening and closing indicating mechanism 8 is fixed with the limiting sleeve 6 and is in linkage connection with the limiting rod 54. By additionally arranging the opening and closing indicating mechanism 8 above the pneumatic shell 51 and enabling the opening and closing indicating mechanism 8 to be in linkage connection with the limiting rod 54, when the piston plate 52 is driven by the driving medium and the reset mechanism 7 to ascend and descend along the pneumatic shell 51, the opening and closing indicating mechanism 8 can also ascend and descend synchronously with the limiting rod 54 above the piston plate 52 and correspondingly send out indicating signals for opening and closing the valve, and mechanism signals are automatically converted into digital analog signals to be transmitted to the automatic control system, so that the automatic control system can conveniently monitor in real time and send out corresponding control instructions.

In order to facilitate the assembly and the fixation of the opening and closing indicating mechanism 8, a containing cavity 63 is arranged in the limiting sleeve 6, and the containing cavity 63 is communicated with the limiting hole 61 to ensure that two ends of the limiting sleeve 6 are communicated; a connecting head 64 is fixed in the inner thread of the cavity 63 of the limiting sleeve 6, and the opening and closing indicating mechanism 8 is fixed with the connecting head 64 in a sealing clamping way. Through set up appearance chamber 63 in 6 upper ends of stop collar additional, set up the screw thread on the week lateral wall that holds chamber 63, just can be with

coupling head

64 and 6 threaded connection of stop collar when the equipment, and open and close indicating mechanism 8 just can be fixed mutually with coupling head 64, when guaranteeing sealing performance, still usable equipment is fixed, promotes the equipment benefit.

In order to facilitate the installation and fixation of the opening and closing indication mechanism 8 and the coupling head 64 and ensure the connection firmness of the opening and closing indication mechanism 8, the outer side wall of the top end of the coupling head 64 is provided with a sealing groove 641 and a clamping groove 642, the opening and closing indication mechanism 8 is provided with a fixing hole 811, the outer peripheral side wall of the opening and closing indication mechanism is provided with a locking hole 812 communicated with the fixing hole 811, and the locking hole 812 is inserted into the clamping groove 642 of the coupling head 64 through a bolt 813 so that the opening and closing indication mechanism 8 and the coupling head 64 are fixedly connected in a sealing manner. By arranging the sealing ring and the clamping groove 642 on the connecting head 64, when the opening and closing indicating mechanism 8 is fixedly connected with the connecting head 64, the sealing ring can ensure the sealing performance in the opening and closing indicating mechanism 8, prevent dust and corrosive gas from entering the opening and closing indicating mechanism 8 to corrode an electronic element device in the opening and closing indicating mechanism 8, and ensure the use safety and prolong the service life of the opening and closing indicating mechanism 8.

In order to facilitate the installation and fixation of the opening and closing indication mechanism 8, the opening and closing indication mechanism 8 comprises a shell 81, and a fixing hole 811 and a locking hole 812 are both arranged below the shell 81, so that the shell 81 is sleeved outside the coupling head 64 and is fixedly connected with a clamping groove 642 of the coupling head 64 through a bolt.

In order to facilitate the valve to correspondingly send out opening or closing indication signals when the valve is opened and closed, an upper limit switch 82, a lower limit switch 83 and a contact rod 84 are further arranged in the shell 81, two contact blocks 85 are arranged at intervals at the upper end of the contact rod 84, and the lower end of the contact rod is inserted into the limit sleeve 6 and is in linkage connection with the limit rod 54 above the piston plate 52. The contact rod 84 arranged in the shell 81 is connected with the limiting rod 54, when the piston plate 52 ascends and descends along the pneumatic shell 51, the limiting rod 54 and the contact rod 84 synchronously ascend and descend, the contact block 85 at the upper end part of the contact rod 84 correspondingly triggers the upper limiting switch 82 and the lower limiting switch 83, the mechanism contact signal is converted into a digital analog signal and sent to the automatic control system, and the automatic control system is ensured to monitor the opening and closing of the valve in real time and send out a command for opening or closing the valve.

The above embodiments should not be considered as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of the present invention.

Claims

1. A pneumatic diaphragm valve with a limiting and opening and closing indicating mechanism comprises a valve body, a valve cover, a diaphragm, a valve rod and a pneumatic head, wherein the pneumatic head comprises a pneumatic shell and a piston plate; the pneumatic sealing device is characterized in that a pneumatic tube head is arranged on the side wall of the pneumatic shell, a piston plate is arranged in the pneumatic shell and is positioned below the pneumatic tube head, and a limiting sleeve is arranged at the top of the pneumatic shell and is in movable sealing connection with the pneumatic shell in a vertically adjustable manner; the driving medium can drive the piston plate to move downwards to close the diaphragm through the pneumatic pipe head, and the piston plate can move upwards along the pneumatic shell under the driving of the resetting mechanism to open the diaphragm and be in abutting contact with the limiting sleeve.

2. The pneumatic diaphragm valve with the limiting and opening and closing indicating mechanism according to claim 1, wherein a limiting hole is formed in the limiting sleeve, a limiting rod is arranged above the piston plate and inserted into the limiting hole to be in dynamic sealing fit with the peripheral side wall of the limiting hole, and the length of the limiting rod is greater than the stroke of the piston plate in vertical displacement.

3. The pneumatic diaphragm valve with limit and open/close indication mechanism of claim 1, wherein the reset mechanism is a reset spring, the reset spring is sleeved outside the valve rod, one end of the reset spring is pressed against the valve cover, and the other end of the reset spring is pressed against the bottom end face of the piston plate.

4. The pneumatic diaphragm valve with the limiting and opening and closing indicating mechanism according to claim 1, wherein the resetting mechanism is an air inlet pipe head, and the air inlet pipe head is arranged on the outer side wall of the valve cover and communicated with the pneumatic shell.

5. The pneumatic diaphragm valve with the limiting and opening and closing indicating mechanism according to claim 2, wherein the upper end surface and the inner side wall of the limiting sleeve are provided with mutually connected arc-shaped grooves, one end of each arc-shaped groove is communicated with the outside, and the other end of each arc-shaped groove is communicated with a limiting hole arranged in the limiting sleeve.

6. The pneumatic diaphragm valve with the limit and open-close indication mechanism according to any one of claims 1 to 5, wherein an open-close indication mechanism is provided above the pneumatic housing, the open-close indication mechanism is fixed with the limit sleeve and is in linkage connection with the limit rod.

7. The pneumatic diaphragm valve with the limiting and opening and closing indicating mechanism according to claim 6, wherein a containing cavity is arranged in the limiting sleeve and communicated with the limiting hole to enable two ends of the limiting sleeve to be communicated; a connecting head is fixed in the inner thread of the containing cavity of the limiting sleeve, and the opening and closing indicating mechanism is fixed with the connecting head in a sealing clamping way.

8. The pneumatic diaphragm valve with the limit and start-stop indicating mechanism according to claim 7, wherein the outer side wall of the top end of the coupling head is provided with a sealing groove and a clamping groove, the start-stop indicating mechanism is provided with a fixing hole, the outer peripheral side wall of the start-stop indicating mechanism is provided with a locking hole communicated with the fixing hole, and the start-stop indicating mechanism and the coupling head are fixedly connected in a sealing way by inserting a bolt into the locking hole and placing the locking hole in the clamping groove of the coupling head.

9. The pneumatic diaphragm valve with the limiting and opening and closing indicating mechanism according to claim 8, wherein the opening and closing indicating mechanism comprises a housing, and the fixing hole and the locking hole are both arranged below the housing so that the housing is sleeved outside the coupling head and is fixedly connected with the clamping groove of the coupling head through a bolt.

10. The pneumatic diaphragm valve with limit and start-stop indicating mechanism according to claim 9, wherein an upper limit switch, a lower limit switch and a contact rod are further disposed in the housing, two contact blocks are disposed at an interval at the upper end of the contact rod, and the lower end of the contact rod is inserted into the limit sleeve and is in linkage connection with the limit rod above the piston plate.