CN212745076U

CN212745076U - Worm wheel flange butterfly valve

Info

Publication number: CN212745076U
Application number: CN202021468610.1U
Authority: CN
Inventors: 刘建根; 黄文生
Original assignee: Nuoys Xiamen Energy Saving Equipment Co ltd
Current assignee: Nuoys Xiamen Energy Saving Equipment Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-03-19
Anticipated expiration: 2030-07-23

Abstract

The utility model provides a simple structure, worm wheel flange butterfly valve that has locking effect, including the butterfly valve body, be equipped with the worm gear case on the butterfly valve body, be equipped with the opening and closing rod on the worm gear case, the cover is equipped with the hand wheel on the opening and closing rod, the rotatable cover of hand wheel is located on the opening and closing rod, be equipped with between opening and closing rod and the hand wheel and be used for restricting opening and closing rod pivoted stop device, stop device includes: the handle comprises a plurality of limiting rods, wherein a first channel is formed in the opening and closing rod, the limiting rods are slidably arranged in the first channel, a limiting groove for the limiting rods to slide in is formed in the hand wheel, and a pushing device for pushing the limiting rods into the limiting groove and a return device for returning the limiting rods are further arranged in the opening and closing rod.

Description

Worm wheel flange butterfly valve

Technical Field

The utility model relates to a valve field, in particular to worm wheel flange butterfly valve.

Background

The worm wheel flange butterfly valve is also called a worm wheel flange flap valve, is a regulating valve with simple structure, and can be used for on-off control of low-pressure pipeline media. The worm gear flange butterfly valve is often used in pipelines for conveying various corrosive and non-corrosive fluid media in engineering systems such as producer furnaces, coal gas, natural gas, liquefied petroleum gas, city gas, cold and hot air, chemical smelting, power generation, environmental protection and the like, and is used for adjusting and cutting off the flow of the media. However, the worm wheel flange butterfly valve is easy to open, and certain potential safety hazards exist in production if effective management is not carried out. If the door is opened maliciously by others, the door is easy to lose in production.

SUMMERY OF THE UTILITY MODEL

Therefore, to foretell problem, the utility model provides a simple structure, worm wheel flange butterfly valve that has the locking effect.

In order to achieve the above object, the technical solution of the present invention is to provide a worm gear flange butterfly valve, which comprises a butterfly valve body, a valve cover disposed on the butterfly valve body, a water inlet channel and a water outlet channel radially disposed along the butterfly valve body, and a valve plate disposed between the water inlet channel and the water outlet channel for controlling opening and closing of fluid, wherein an opening and closing rod is disposed above the valve plate and inside the valve body, a first channel is disposed above the butterfly valve body, a lower end of the opening and closing rod is fixedly connected to the valve plate, an upper end of the opening and closing rod penetrates through the first channel, an encryption housing is fixedly disposed on the valve cover, the opening and closing rod is disposed in the encryption housing, an encryption device is detachably disposed in the encryption housing, the encryption device includes a fixing sleeve, the fixing sleeve is slidably disposed on the encryption housing, and a first cavity is disposed in the, the fixed sleeve is provided with a second channel for the opening and closing rod to pass through, the fixed sleeve is positioned in the first cavity and fixedly provided with a first pipeline, the diameter of the lower end part of the first pipeline is gradually reduced from top to bottom, the lower end part of the first pipeline is also provided with a third channel communicated with the second channel, the first pipeline is also internally provided with a second pipeline in a matching and slidable manner, the diameter of the lower end part of the second pipeline is gradually reduced from top to bottom, the lower end part of the second pipeline is also provided with three through holes, a limiting seat is fixedly arranged in the second pipeline, three iron balls are movably arranged on the limiting seat and the inner wall of the second pipeline in the second pipeline, the second pipeline is also provided with two fourth channels communicated with the third channel, the opening and closing rod penetrates through the second pipeline and penetrates through the iron balls to enable the iron balls to be clamped in the through holes, and a limiting device for limiting the opening and closing rod to move upwards after penetrating into the second pipeline is arranged between the second pipeline and the, the fixed sleeve is also detachably provided with a decryption device for decryption.

The further improvement is that: the limiting device is a supporting spring, one end of the supporting spring is fixedly connected with the inner wall of the fixed sleeve, and the other end of the supporting spring is fixedly connected with the limiting seat.

The further improvement is that: the decryption device is a magnetic opening and closing rod, and the fixing sleeve is provided with an opening and closing channel for inserting the opening and closing rod.

The further improvement is that: the upper end part of the opening and closing rod is provided with a square counter bore, and the lower end part of the opening and closing rod is a square rod which can be clamped into the square counter bore.

The further improvement is that: and a hand wheel is fixedly arranged at the upper end part of the opening and closing rod.

The further improvement is that: the fixed sleeve is fixedly provided with a limiting boss which prevents the fixed sleeve from sliding into the encryption shell in a surrounding manner.

The further improvement is that: the diameter of the upper end part of the opening and closing rod is gradually reduced from bottom to top.

The utility model has the advantages and the beneficial effects that:

when the butterfly valve is not used, the limiting rod and the limiting groove are disengaged, and the hand wheel idles, so that the butterfly valve cannot be opened, and the problem that the butterfly valve is opened by rotating the hand wheel by non-working personnel to cause loss in production is avoided. The production management is convenient, and the manual maintenance cost is reduced.

Drawings

Fig. 1 is the utility model discloses structure schematic diagram is cut open to worm wheel flange butterfly valve part.

Fig. 2 is a schematic view of a partially enlarged structure of embodiment a of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1-2, the worm-gear flange butterfly valve includes a butterfly valve body 1, a worm gear case 2 is disposed on the butterfly valve body 1, an opening/closing rod 3 is disposed on the worm gear case 2, a hand wheel 4 is rotatably sleeved on the opening/closing rod 3, a limiting device for limiting rotation of the opening/closing rod 3 is disposed between the opening/closing rod 3 and the hand wheel 4, and the limiting device includes: the device comprises two limit rods 5, a first channel 61 is arranged on the opening and closing rod 3, the limit rods 5 can be arranged in the first channel 61 in a sliding manner, a limit groove 6 for the limit rods 5 to slide in is arranged on the hand wheel 4, a pushing device for pushing the limit rods 5 into the limit groove 6 is also arranged in the opening and closing rod 3, the pushing device comprises a pushing rod 8, a second channel 7 is arranged in the opening and closing rod 3, the pushing rod 8 is arranged in the second channel 7 in a penetrating manner, the pushing rod 8 is in threaded connection with the inner wall of the second channel 7, a first inclined surface 82 with the diameter gradually reduced from left to right is arranged at the end part of the pushing rod 8, a second inclined surface 52 which is opposite to the first inclined surface 82 of the pushing rod 8 is arranged on the limit rod 5, the diameter of the second inclined surface 52 is gradually reduced from left to right, and a return device for returning the limit rods 5 is also arranged in the opening and closing rod 3, the return device comprises a return block 9 opposite to the bottom of the push rod 8, a third channel 10 is arranged on the opening and closing rod 3, the return block 9 can be arranged on the third channel 10 in a sliding manner, a first clamping opening 92 is arranged on the return block 9, a third inclined surface 91 with the diameter gradually decreasing from left to right is arranged in the first clamping opening 92, the first clamping opening 92 enables the return block 9 to be provided with a first clamping protrusion 93, a second clamping opening 53 is arranged on the limiting rod 5, a fourth inclined surface 52 opposite to the third inclined surface 91 on the first clamping opening 92 is arranged in the second clamping opening 53, the diameter of the fourth inclined surface 52 gradually decreases from left to right, the second clamping opening 53 enables the limiting rod 5 to be provided with a second clamping protrusion 54, the first clamping protrusion 93 on the return block 9 can be clamped into the second clamping opening 53, the second clamping protrusion 54 on the limiting rod 5 can be clamped into the first clamping opening 92, the return block 9 is clamped with the limiting rod 5, a compression spring 11 for pushing the return block 9 to be clamped with the limiting rod 5 is further arranged in the opening and closing rod 3, one end of the compression spring 11 is fixedly connected with the return block 9, and the other end of the compression spring 11 is fixedly connected with the inner wall of the third channel 10.

In order to facilitate the rotation of the push rod 8, a hexagonal counter bore 81 is formed in the end, located on the hand wheel 4, of the push rod 8, and the push rod 8 is always located in the first channel 61.

The working principle is as follows:

when the butterfly valve is to be opened, the hexagonal counter bore is clamped into the hexagonal counter bore by an external tool, the push rod 8 is rotated, the push rod 8 moves rightwards, the first inclined surface 82 and the second inclined surface 52 of the push rod 8 resist each other at the moment, the limiting rod 5 is pushed open, the limiting rod slides towards the direction of the limiting groove 6 and is clamped with the limiting groove 6, the return block 9 is forced to move rightwards, the compression spring 11 elastically deforms, the hand wheel 4 is rotated at the moment, and the hand wheel 4 drives the opening and closing rod 3 to rotate to open the butterfly valve. When the butterfly valve is to be closed, an external tool is clamped into the hexagonal counter bore, the push rod 8 is rotated reversely, the push rod 8 moves leftwards, at the moment, the compression spring 11 resets to push the return block 9 to move leftwards, the first clamping protrusion 93 on the return block 9 gradually slides into the second bayonet on the limiting rod 5, the second clamping protrusion 54 on the limiting rod 5 gradually slides into the first bayonet of the return block 9, the third inclined surface 91 and the fourth inclined surface 52 interact with each other, when the return block 9 is clamped into the limiting rod 5, the limiting rod 5 moves away from the limiting groove 6 to release the clamping with the limiting groove 6, at the moment, when the hand wheel 4 is rotated, the hand wheel 4 idles, and the butterfly valve cannot be opened.

Having shown and described the basic principles and essential features of the invention and its advantages, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention, all of which are intended to be covered by the appended claims and their equivalents.

Claims

1. The worm gear flange butterfly valve comprises a butterfly valve body, wherein a worm gear box is arranged on the butterfly valve body, an opening and closing rod is arranged on the worm gear box, and a hand wheel is sleeved on the opening and closing rod, and the butterfly valve is characterized in that: the hand wheel is rotatable to be located on the opening and closing rod, be equipped with between opening and closing rod and the hand wheel and be used for restricting opening and closing rod pivoted stop device, stop device includes: the handle comprises a plurality of limiting rods, wherein a first channel is formed in the opening and closing rod, the limiting rods are slidably arranged in the first channel, a limiting groove for the limiting rods to slide in is formed in the hand wheel, and a pushing device for pushing the limiting rods into the limiting groove and a return device for returning the limiting rods are further arranged in the opening and closing rod.

2. The worm-gear flange butterfly valve of claim 1, wherein: the pushing device comprises a pushing rod, a second channel is formed in the opening and closing rod, the pushing rod penetrates through the second channel and is in threaded connection with the inner wall of the second channel, a first inclined plane with the diameter gradually reduced from left to right is formed in the end portion of the pushing rod, a second inclined plane which is opposite to the first inclined plane of the pushing rod is formed in the limiting rod, and the diameter of the second inclined plane is gradually reduced from left to right.

3. The worm-gear flange butterfly valve of claim 1, wherein: the resetting device comprises a resetting block which is opposite to the bottom of the pushing rod, a third channel is formed in the opening and closing rod, the resetting block can be arranged in the third channel in a sliding mode, a plurality of first clamping openings are formed in the resetting block, third inclined planes with diameters gradually decreasing from left to right are formed in the first clamping openings, a second clamping opening is formed in the limiting rod, a fourth inclined plane which is opposite to the third inclined plane on the first clamping opening is formed in the second clamping opening, the diameters of the fourth inclined planes gradually decrease from left to right, the resetting block can be clamped with the limiting rod, and a pushing device for pushing the resetting block to be clamped with the limiting rod is further arranged in the opening and closing rod.

4. The worm-gear flange butterfly valve of claim 3, wherein: the pushing device is a compression spring, one end of the compression spring is fixedly connected with the return block, and the other end of the compression spring is fixedly connected with the inner wall of the third channel.

5. The worm-gear flange butterfly valve of claim 2, wherein: the push rod is located at the hand wheel end and is provided with a hexagonal counter bore, and the push rod is located in the first channel all the time.