Rising stem valve rotating rod protection device and rising stem valve

Abstract

The utility model relates to the technical field of rising stem valves, and discloses a rising stem valve rotating rod protection device which comprises an outer shell, a containing part used for containing a rotating rod is arranged in the outer shell, a telescopic section is further arranged on the outer shell, and the telescopic section is used for stretching or contracting the outer shell in the axial direction of the outer shell. At least two connecting pieces are further arranged on the outer side face of the outer shell and used for shrinking the containing part in the circumferential direction of the outer shell and limiting stretching or shrinking of the telescopic section. Meanwhile, the utility model further discloses a rising stem valve. Under the cooperation of the connecting piece and the telescopic section, the length of the outer shell can be adjusted according to the position of the rotating rod, friction between the hand wheel and the bottom of the outer shell is avoided, the telescopic length of the telescopic section is limited by the connecting piece in the mode that the containing part is contracted in the circumferential direction, and the inner wall of the outer shell is attached to the rotating rod; lubricating grease on the rotating rod can be prevented from making contact with outside air to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of rising-stem valves, and particularly relates to a protection device for a rising-stem of a rising-stem valve and a rising-stem valve. Background Art

[0002] A rising-stem valve is a type of valve. Its rising-stem design allows operators to easily see the open or closed state of the valve. This design is usually used for valves that need to be frequently operated, so that operators can timely understand the state of the valve and ensure normal operation. However, the valve stem of a rising-stem valve is usually exposed. Therefore, the grease on the valve stem will react with oxygen in the air, thereby destroying its lubricating performance. Moreover, the end of the valve stem is sharp and is easily accidentally bumped, which may hurt the staff.

[0003] Chinese Patent CN214008211U discloses a filter gate valve, which includes a valve body, a valve stem installed on the valve body, and a rotating disk threadedly connected to the valve stem. The rotating disk is rotatably connected to the valve body. It also includes a protection mechanism arranged at the upper end of the valve stem. Through the protection mechanism, pedestrians can be prevented from hitting the end of the valve stem. When the rotating disk rotates and the valve stem rises, a rubber cap is installed at the end of the valve stem to play a protective role.

[0004] The above technical solution can be telescoped along with the movement of the valve stem by arranging a corrugated rubber sleeve at the lower end of the rubber cap, and always abuts against the rotating disk, avoiding hitting the thread of the valve stem, which is safer. However, when adjusting the rotating disk in the above technical solution, it will surely rub against the bottom of the rubber sleeve. After a long time, the corrugation of the rubber sleeve will be damaged. Moreover, the lower end of the rubber sleeve is open, and the valve stem is still easily reacted with oxygen, thereby destroying its lubricating performance. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above problems, and provides a protection device for a rising-stem of a rising-stem valve. With the cooperation of the connecting piece and the telescopic section, the protection device for the rising-stem can adjust the length of the outer shell according to the position of the rising-stem, avoiding friction between the handwheel and the bottom of the outer shell. Moreover, the connecting piece restricts the telescopic length of the telescopic section in a way of a circumferential contraction accommodating part, so that the inner wall of the outer shell fits with the rising-stem, which can prevent the grease on the rising-stem from contacting the outside air to a certain extent. At the same time, the utility model also discloses a rising-stem valve adopting the protection device.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A protection device for a rising-stem of a rising-stem valve includes an outer shell. An accommodating part for accommodating the rising-stem is arranged in the outer shell. A telescopic section is also arranged on the outer shell. The telescopic section is used for stretching or contracting the outer shell along the axial direction of the outer shell to change the length of the accommodating part;

[0008] On the outer side surface of the outer housing, at least two connecting members are further provided. The connecting members are used to circumferentially contract the accommodating portion along the outer housing and limit the stretching or contraction of the telescopic section.

[0009] Preferably, an end cap is provided at the top of the outer housing. A first chamber is provided inside the outer housing, and a second chamber is provided inside the end cap. The first chamber and the second chamber form the accommodating portion. The connecting member is used to circumferentially contract the first chamber along the outer housing.

[0010] Preferably, the telescopic section is located between the upper end and the lower end of the outer housing. At least one connecting member is respectively provided at the upper end and the lower end of the outer housing.

[0011] Preferably, there are two connecting members, namely a first connecting member and a second connecting member. The first connecting member is located at the upper end of the outer housing, and the second connecting member is located at the lower end of the outer housing.

[0012] Preferably, there are three connecting members, and a third connecting member is further included. The third connecting member is located in the middle of the outer housing, and the telescopic section is located between the second connecting member and the third connecting member.

[0013] Preferably, the end cap is of a spherical crown-shaped structure, and the end cap is an end cap made of plastic material.

[0014] Preferably, the outer housing is a cloth outer housing.

[0015] Preferably, the telescopic section is a corrugated tube body.

[0016] Preferably, the circumferential contraction of the accommodating portion along the outer housing between the connecting member and the outer housing is realized through a detachable connection. The detachable connection is a detachable connection through a magic tape, a detachable connection through a fastener or a detachable connection through a lace.

[0017] Meanwhile, the present utility model also discloses a rising-stem valve, which includes a valve body, a spindle installed on the valve body, and a handwheel threadedly connected to the spindle. A rising-stem valve spindle protection device as above is sleeved on the spindle.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] With the cooperation of the connecting member and the telescopic section, the present utility model can adjust the length of the outer housing according to the position of the spindle, avoid the friction between the handwheel and the bottom of the outer housing, and moreover, the connecting member restricts the telescopic length of the telescopic section by circumferentially contracting the accommodating portion, so that the inner wall of the outer housing fits the spindle, and can prevent the grease on the spindle from contacting the outside air to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the rising-stem valve spindle protection device of Embodiment 1;

[0021] Figure 2 It is a schematic structural diagram of the rising-stem valve in Embodiment 2.

[0022] Among them, the reference numerals of each attached figure are as follows:

[0023] Outer housing 1; valve body 2; rotating rod 3; handwheel 4; accommodating part 11; telescopic section 12; connecting piece 13; end cover 14; first chamber 15; first connecting piece 131; second connecting piece 132; third connecting piece 133; second chamber 141. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0025] Embodiment 1

[0026] Referring to Figure 1 , a rising-stem valve rotating rod protection device includes an outer housing 1. An accommodating part 11 for accommodating the rotating rod 3 is provided inside the outer housing 1. A telescopic section 12 is further provided on the outer housing 1. The telescopic section 12 is used to stretch or contract the outer housing 1 along the axial direction of the outer housing 1 to change the length of the accommodating part 11;

[0027] At least two connecting pieces 13 are further provided on the outer side surface of the outer housing 1. The connecting pieces 13 are used to contract the accommodating part 11 along the circumferential direction of the outer housing 1 and limit the stretching or contraction of the outer housing 1 by the telescopic section 12.

[0028] In this design, the operator can sleeved the outer housing 1 on the rotating rod 3 so that the rotating rod 3 is located inside the accommodating part 11. If the outer housing 1 cannot completely wrap the rotating rod 3 above the valve handwheel 4 in the initial state, the operator can stretch or contract the outer housing 1 along the axial direction of the outer housing 1 through the telescopic section 12 so that the outer housing 1 completely wraps the rotating rod 3. Then, the telescopic section 12 is fixed at the current length by contracting the accommodating part 11 along the circumferential direction of the outer housing 1 through the connecting piece 13, and the stretching or contraction of the outer housing 1 by the telescopic section 12 is restricted.

[0029] When the rotating rod 3 needs to be adjusted again, the operator first releases the connecting piece 13. After the rotating rod 3 is adjusted to the appropriate position, then the outer housing 1 is adjusted to the appropriate position through the telescopic section 12, and then the telescopic section 12 is fixed by the connecting piece 13.

[0030] In this way, with the cooperation of the connecting piece 13 and the telescopic section 12, the length of the outer shell 1 can be adjusted according to the position of the rotating rod 3 to avoid friction between the hand wheel 4 and the bottom of the outer shell 1. In addition, the connecting piece 13 uses a circumferentially contracted accommodating portion 11 to limit the telescopic length of the telescopic section 12, so that the inner wall of the outer shell 1 and the rotating rod 3 fit together, which can prevent the grease on the rotating rod 3 from contacting the outside air to a certain extent.

[0031] Preferably, an end cover 14 is provided on the top of the outer shell 1, a first chamber 15 is provided inside the outer shell 1, a second chamber 141 is provided inside the end cover 14, the first chamber 15 and the second chamber 141 form a receiving portion 11, and the connecting piece 13 is used to shrink the first chamber 15 along the circumference of the outer shell.

[0032] Specifically, after the outer shell 1 is sleeved on the rotating rod 3, the end of the rotating rod 3 is located in the second chamber 141 of the end cover 14, forming a package of a certain thickness at the end of the rotating rod 3, and the end cover 14 adopts a spherical crown structure to ensure that the outer side surface of the end cover 14 is an arc surface to avoid accidental collision and injury to the staff; and the rod body of the rotating rod 3 is located in the first chamber 15, with the cooperation of the connecting piece 13, it can not only play a protective role, but also prevent the grease on the valve stem from contacting with the outside air to a certain extent.

[0033] Optionally, the end cover 14 is made of plastic, which is lighter than metal and other materials, and is helpful in reducing the overall weight and facilitating transportation and installation.

[0034] Further, the telescopic section 12 is located between the upper end and the lower end of the outer shell 1, and at least one connecting member 13 is respectively provided at the upper end and the lower end of the outer shell 1. The connecting member 13 located at the upper end of the outer shell 1 can fix one end of the telescopic section 12, and the connecting member 13 located at the lower end of the outer shell 1 can limit the telescopic movement of the telescopic section 12. The fixing of the telescopic section 12 is achieved by the cooperation of the connecting member 13 at the upper end of the outer shell 1 and the connecting member 13 at the lower end of the outer shell 1.

[0035] In a preferred embodiment, there are three connecting members 13, namely a first connecting member 131, a second connecting member 132, and a third connecting member 133. The first connecting member 131 is located at the upper end of the outer shell 1, and is used to fix the position of the end cover 14; the second connecting member 132 is located in the middle of the outer shell 1, and is used to fix one end of the telescopic section 12; the third connecting member 133 is located at the lower end of the outer shell 1, and is used to limit the telescopic movement of the telescopic section 12.

[0036] In other embodiments, there are two connecting members 13, namely a first connecting member 131 and a second connecting member 132. The first connecting member 131 is located at the upper end of the outer shell 1 and is used to fix the position of the end cover 14; the second connecting member 132 is located at the lower end of the outer shell 1 and is used to limit the extension and retraction of the telescopic section 12.

[0037] In actual use, since the outer housing 1 is a cloth outer housing 1, when pulling the telescopic section 12 in the second method, since one end of the telescopic section 12 is not fixed, the outer housing 1 will also be stretched by the force. After being stretched for a long time, deformation will occur. Therefore, in this embodiment, based on the premise of stability and durability, the first method is selected.

[0038] Preferably, the telescopic section 12 is a corrugated tube. As a pipeline structure with telescopic ability, the corrugated tube has the advantages of strong seismic resistance, large telescopic range, and good economy in practical applications.

[0039] In a specific embodiment, the connecting member 13 and the outer housing 1 can contract the accommodating portion 11 by means of a lace. Specifically, the connecting member 13 is a lace (not shown in the figure). The lace can be threaded through the outer housing 1 along the circumferential path of the outer housing 1, or the middle part of the lace is connected to the outer housing 1 to contract the accommodating portion 11 through the lace connection.

[0040] In other embodiments, the connecting member 13 and the outer housing 1 can contract the accommodating portion 11 by means of fasteners. Specifically, the connecting member 13 is a D-ring (not shown in the figure), a strap (not shown in the figure). By connecting a strap and a D-ring to the outer housing 1 and threading the strap through the D-ring, adjusting the strap can contract the accommodating portion 11.

[0041] In a preferred embodiment, the connecting member 13 can contract the accommodating portion 11 by means of a magic tape 134. Specifically, the connecting member 13 includes a connecting surface of a suede and a hook surface, and the suede or the hook surface is arranged on the outer housing 1. The accommodating portion 11 can be contracted by fitting the suede and the hook surface.

[0042] All three methods can achieve the circumferential contraction of the accommodating portion 11 along the outer housing, and the operator can choose according to the actual situation.

[0043] Embodiment 2

[0044] Reference Figure 2 , a rising-stem valve, includes a valve body 2, a rotating rod 3 installed on the valve body 2, and a handwheel 4 threadedly connected to the rotating rod 3. A rising-stem valve rotating rod protection device as in Embodiment 1 is sleeved on the rotating rod 3.

[0045] In this design, the operator can sleeved the outer housing 1 on the rotating rod 3, so that the end of the rotating rod 3 is located in the second chamber 141, and the rod body of the rotating rod 3 is located in the first chamber 15. Then, the end cover 14 is fixed by the first connecting member 131, and one end of the telescopic section 12 is fixed by the second connecting member 132. If the outer housing 1 cannot completely wrap the rotating rod 3 above the valve handwheel 4 in the initial state, the outer housing 1 can be stretched or contracted along the axial direction of the outer housing 1 through the telescopic section 12, so that the outer housing 1 completely includes the rotating rod 3. Then, the telescopic section 12 is fixed at the current length by the third connecting member 133, and the telescopic section 12 is restricted from stretching or contracting along the axial direction of the outer housing 1 to complete the installation.

[0046] In this way, the outer housing 1 can match different heights of the rotating rod 3, and the telescopic section 12 can be restricted from telescoping by the third connecting member 133 after the adjustment of the rotating rod 3 is completed, avoiding friction with the outer housing 1 during each adjustment. The third connecting member 133 can prevent the grease on the rotating rod 3 from contacting the outside air to a certain extent by shrinking the accommodating portion 11 along the circumferential direction of the outer housing.

[0047] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rising stem valve rotary rod protection device, comprising an outer shell, wherein the outer shell is provided with a receiving portion for receiving the rotary rod, characterized in that: The outer shell is also provided with a telescopic section, which is used to stretch or shrink the outer shell along the axial direction of the outer shell to change the length of the accommodating portion; At least two connecting members are also provided on the outer side surface of the outer shell, and the connecting members are used to shrink the accommodating portion along the circumference of the outer shell and limit the stretching or shrinking of the telescopic section.

2. The rising stem valve rotating rod protection device according to claim 1, characterized in that: An end cover is provided on the top of the outer shell, a first chamber is provided in the outer shell, a second chamber is provided in the end cover, the first chamber and the second chamber form the accommodating portion, and the connecting member is used to shrink the first chamber along the circumference of the outer shell.

3. The rising stem valve rotating rod protection device according to claim 1, characterized in that: The telescopic section is located between the upper end and the lower end of the outer shell, and the upper end and the lower end of the outer shell are respectively provided with at least one connecting member.

4. The rising stem valve rotating rod protection device according to claim 3, characterized in that: There are two connecting members, namely a first connecting member and a second connecting member. The first connecting member is located at the upper end of the outer shell, and the second connecting member is located at the lower end of the outer shell.

5. The rising stem valve rotating rod protection device according to claim 4, characterized in that: There are three connecting members, including a third connecting member, and the third connecting member is located in the middle of the outer shell. The telescopic section is located between the second connecting member and the third connecting member.

6. The rising stem valve rotating rod protection device according to claim 2, characterized in that: The end cover is a spherical cap structure and is made of plastic material.

7. The rising stem valve rotating rod protection device according to claim 1, characterized in that: The outer shell is a cloth outer shell.

8. The rising stem valve rotating stem protection device according to claim 1, characterized in that: The telescopic section is a corrugated tube body.

9. The rising stem valve rotating stem protection device according to claim 1, characterized in that: The connector and the outer shell are detachably connected to achieve contraction of the accommodating portion along the circumference of the outer shell. The detachable connection is a detachable connection through Velcro, a detachable connection through a fastener, or a detachable connection through a tie.

10. A rising stem valve, comprising a valve body, a rotary stem mounted on the valve body, and a hand wheel threadedly connected to the rotary stem, characterized in that: The rotating rod is sleeved with a rising stem valve rotating rod protection device as described in any one of claims 1 to 9.

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