CN210661437U - High-performance expansion gate valve with inverted sealing function - Google Patents
High-performance expansion gate valve with inverted sealing function Download PDFInfo
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- CN210661437U CN210661437U CN201920687136.2U CN201920687136U CN210661437U CN 210661437 U CN210661437 U CN 210661437U CN 201920687136 U CN201920687136 U CN 201920687136U CN 210661437 U CN210661437 U CN 210661437U
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Abstract
The utility model discloses a high-performance expansion gate valve with a back-sealing function, which comprises a valve body, a valve rod, a gate plate, a valve cover and a pressing cap; the valve cover is arranged on the valve body; a gate slot is arranged in the valve body; the gate plate is arranged in the gate groove; a driving hand wheel is arranged at the top end of the valve rod; the valve rod penetrates through the valve cover and is in threaded connection with the gate plate; the valve rod is provided with an inverted cone shoulder; a pressing cap is arranged on the top of the valve cover; a bearing is sleeved on the valve rod; a packing gland is arranged below the bearing; a packing cavity is arranged between the valve rod and the valve cover; the valve cover is provided with a sealing grease injection valve and a grease injector, and the grease injector is communicated with the packing cavity through a grease injection hole which is arranged on the valve cover and inclines upwards. The utility model discloses sealed effectual, satisfy PR2 level standard, the security is good, and the accessible is annotated the fat and is realized promptly sealedly when appearing leaking the back, avoids taking place the incident, and the maintenance is convenient with the change sealing filler, can realize pressing the area to change the filler.
Description
Technical Field
The utility model relates to a valve field especially relates to a high performance inflation gate valve of sealing function is fallen in area.
Background
The valve is a common part in pipeline transportation, is usually used for opening and closing a pipeline, controlling flow direction, adjusting and controlling medium transportation, is a control part in a fluid transportation system, generally has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, shunting or overflowing and relieving pressure and the like, and can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. Gate valves are one of the most common valves. The gate valve uses the gate plate as an opening and closing part, the moving direction of the gate plate is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. The gate valve is sealed by the contact of the valve seat and the gate plate.
The valve rod and the valve cover of the existing expansion gate valve are sealed by sealing filler. Packing and/or sealing grease are typically used as the packing. The sealing filler belongs to a vulnerable product and needs to be replaced frequently. The sealing filler of the existing expansion gate valve structure is very inconvenient to replace, the maintenance and the maintenance operation are complicated, meanwhile, the sealing filler is damaged, the gate valve is leaked, the effective rapid treatment is difficult to carry out, and the safety performance is poor.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides a high performance inflation gate valve of sealing function falls in area adopts the back taper circular bead to not enough among the prior art, can realize falling the sealing function, has solved current inflation gate valve structure and has changed that gland packing is very inconvenient, and the maintenance is loaded down with trivial details with the maintenance operation, damages to gland packing simultaneously, leads to the gate valve to leak, is difficult to carry out effectual rapid processing, problem that the security performance is poor.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: a high-performance expansion gate valve with a back sealing function comprises a valve body, a valve rod, a gate plate, a valve cover and a pressing cap; the valve cover is arranged on the valve body; a gate slot is arranged in the valve body; the gate plate is arranged in the gate slot and moves along the gate slot; the valve cover is provided with a valve rod hole penetrating through the valve cover; a driving hand wheel for driving the valve rod to rotate is mounted at the top end of the valve rod; the valve rod penetrates through a valve rod hole of the valve cover and is in threaded connection with the gate plate; the valve rod rotates to drive the gate plate to move along the gate groove; the valve rod is provided with an inverted cone shoulder which is of a conical structure, and the lower end of the valve rod hole is of a horn-shaped structure matched with the inverted cone shoulder; a pressing cap is arranged on the top of the valve cover; a bearing is sleeved on the valve rod; a packing gland is arranged below the bearing; a packing cavity is arranged between the valve rod and the valve cover; the packing cavity is filled with sealing packing; the lower end of the packing gland extends into the packing cavity; a sealing grease injection valve is arranged on the valve cover and is communicated with the filling cavity; the grease injector is arranged on the valve cover and is communicated with the filling cavity through an upward grease injection hole arranged on the valve cover.
As a preferred scheme of the utility model, a press ring which extends outwards along the radial direction of the valve rod is arranged on the valve rod; the bearing is two, is located the upper and lower both sides of clamping ring.
As an optimized proposal of the utility model, a circular brake hole is arranged on the brake plate.
As a preferred scheme of the utility model, the sealing filler comprises a V-shaped packing, a packing spacer ring and a packing sealing ring; the packing sealing ring, the packing spacer ring and the V-shaped packing are sequentially superposed from bottom to top; the V-shaped packing is of a V-shaped ring structure; the packing sealing ring is of a circular ring structure with an annular lip at the lower end; and a metal support piece is arranged in the annular lip of the packing seal ring.
As a preferred scheme of the utility model, the V-shaped packing is a plurality of and is overlapped with each other; the packing gland is pressed on the V-shaped packing.
The method for replacing the filler of the high-performance expansion gate valve with the inverted sealing function adopts the expansion gate valve and comprises the following steps:
step 1, rotating the driving hand wheel to rotate the valve rod to drive the flashboard to move downwards to the bottom of the gate slot and fasten the flashboard;
step 2, loosening the pressure cap to separate the pressure cap from the valve cover, rotating the valve rod again, moving the flashboard downwards again to push the reverse taper shoulder upwards, and sealing the reverse taper shoulder and the valve cover;
and 4, installing the pressing cap again, rotating the valve rod to enable the inverted taper shoulder and the valve cover to be separated from sealing and in clearance fit, fastening the pressing cap, enabling the packing gland to downwards pressurize the packing cavity, and injecting sealing grease into the sealing grease injection valve to finish the packing replacement process.
As a preferable scheme of the method for replacing the packing, in step 3, after the sealing packing in the packing cavity is pressed out by the grease injector, a professional tool is firstly adopted to open the inverted sealing ball in the sealing grease injection valve, and then the qualified sealing packing is replaced and the professional tool is detached.
As a preferable scheme of the method for replacing the packing, when the sealing packing is damaged and leaks, the emergency grease injection sealing is firstly carried out on the packing cavity through the grease injector, and then the packing replacing step is carried out.
Through the technical scheme, the utility model discloses technical scheme's beneficial effect is: the utility model has the advantages of simple and reasonable structure, it is sealed effectual, can reach and carry out 500 times high and low temperature at least and take the pressure circulation to have the requirement of leaking, satisfy PR2 level standard, the security is good, and the accessible is annotated the fat and is realized promptly sealedly when appearing leaking the back, avoids taking place the incident, and the maintenance is convenient with the change sealing filler, can realize taking the pressure to change the filler, need not to dismantle the valve body, excellent in use effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 and fig. 2 are schematic structural diagrams of the present invention with different cross sections.
The corresponding part names indicated by the numbers and letters in the drawings:
1. valve body 2, valve rod 3, flashboard
4. Back taper shoulder 5, driving hand wheel 6, pressing cap
7. Bearing 8. V-shaped packing 9. packing seal ring
10. Packing spacer ring 11, valve cover 12, sealing grease injection valve
13. A grease injector.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Combine fig. 1, fig. 2, the utility model provides a high performance inflation gate valve of sealed function falls in area improves on current gate valve structure, adds the structure of falling seal, can realize quick replacement sealing filler, and the security is good. The utility model discloses a valve body 1, valve rod 2, flashboard 3, valve gap 11 and pressure cap 6. The bonnet 11 is mounted on the valve body 1. A gate slot is arranged in the valve body 1; the gate plate 3 is installed in the gate groove and moves along the gate groove. The shutter 3 is provided with a circular shutter hole. The valve cover 11 is provided with a valve rod hole penetrating the valve cover 11. A driving hand wheel 5 for driving the valve rod 2 to rotate is arranged at the top end of the valve rod 2. The valve rod 2 is threaded through the valve rod hole of the valve cover 11 and is connected with the shutter 3. The valve rod 2 rotates to drive the gate plate 3 to move along the gate slot. Be provided with back taper circular bead 4 on valve rod 2, back taper circular bead 4 is the toper structure, and the lower extreme in valve rod hole is the tubaeform structure with back taper circular bead 4 complex. When in normal use, the inverted conical shoulder is in clearance fit with the valve cover 11; when it is necessary to replace the packing or emergency sealing, the sealing surface is formed with the valve cover 11 by the reverse tapered shoulder (in particular, refer to a method of replacing the packing).
A press cap 6 is arranged on the top of the valve cover 11. The valve rod 2 is sleeved with a bearing 7. Specifically, a press ring which extends outwards along the radial direction of the valve rod 2 is arranged on the valve rod 2; the two bearings 7 are positioned at the upper and lower sides of the pressure ring. A packing gland is arranged below the bearing 7; a packing chamber is provided between the valve stem 2 and the bonnet 11. The packing cavity is filled with sealing packing. The lower end of the packing gland extends into the packing cavity. The packing gland is pressed down through the fastening pressing cap 6, the sealing packing in the sealing cavity works under pressure, and the sealing performance is ensured. A sealing grease injection valve 12 is mounted on the valve cover 11, and the sealing grease injection valve 12 is communicated with the packing chamber. A grease injector 13 is mounted on the valve cover 11, and the grease injector 13 is communicated with the packing cavity through a grease injection hole which is arranged on the valve cover 11 and inclines upwards. The filling cavity may be filled with grease by means of a grease injector 13.
In order to guarantee the utility model discloses a sealing performance, the sealing filler includes V-arrangement packing 8, packing spacer ring 10 and packing sealing washer 9. The packing sealing ring 9, the packing spacer ring 10 and the V-shaped packing 8 are sequentially superposed from bottom to top. The V-shaped packing 8 is in a V-shaped ring structure. The packing seal ring 9 is a circular ring structure with an annular lip at the lower end. And a metal support piece is arranged in the annular lip of the packing seal ring 9. When the pressing cap 6 is fastened, the packing gland is pressed downwards, the V-shaped packing 8 is opened to realize edge sealing, and the annular lip of the packing seal ring 9 is opened under the action of the metal support piece to ensure the sealing effect. Preferably, the V-shaped packing 8 is a plurality of packing which are mutually overlapped; the packing gland is pressed on the V-shaped packing 8.
The utility model discloses specifically adopt following method to realize changing the filler:
step 1, rotating a driving hand wheel 5 to rotate a valve rod 2 and drive a gate plate 3 to move downwards to the bottom of a gate slot and fasten;
step 2, loosening the pressure cap 6 to separate the pressure cap 6 from the valve cover 11, rotating the valve rod 2 again, moving the flashboard 3 downwards again to push the reverse taper shoulder 4 upwards, and sealing between the reverse taper shoulder 4 and the valve cover 11;
And 4, installing the pressing cap 6 again, rotating the valve rod 2 to enable the inverted cone shoulder 4 and the valve cover 11 to be separated from sealing and in clearance fit, fastening the pressing cap 6 to enable the packing gland to downwards pressurize the packing cavity, and injecting sealing grease into the sealing grease injection valve 12 to finish the packing replacement process.
The utility model discloses when the seal packing damages to leak, can realize quick urgent sealing, it is concrete, sealed through annotating fat ware 13 and promptly annotating the fat to the packing intracavity. And after emergency sealing, replacing the filler.
Through the above-mentioned specific embodiment, the beneficial effects of the utility model are that: the utility model has the advantages of simple and reasonable structure, it is sealed effectual, can reach and carry out 500 times high and low temperature at least and take the pressure circulation to have the requirement of leaking, satisfy PR2 level standard, the security is good, and the accessible is annotated the fat and is realized promptly sealedly when appearing leaking the back, avoids taking place the incident, and the maintenance is convenient with the change sealing filler, can realize taking the pressure to change the filler, need not to dismantle valve body 1, excellent in use effect. The utility model discloses when changing the filler, the step is simple, and it is fast to change, and the security is good.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A high-performance expansion gate valve with a back sealing function is characterized by comprising a valve body, a valve rod, a gate plate, a valve cover and a pressing cap; the valve cover is arranged on the valve body; a gate slot is arranged in the valve body; the gate plate is arranged in the gate slot and moves along the gate slot; the valve cover is provided with a valve rod hole penetrating through the valve cover; a driving hand wheel for driving the valve rod to rotate is mounted at the top end of the valve rod; the valve rod penetrates through a valve rod hole of the valve cover and is in threaded connection with the gate plate; the valve rod rotates to drive the gate plate to move along the gate groove; the valve rod is provided with an inverted cone shoulder which is of a conical structure, and the lower end of the valve rod hole is of a horn-shaped structure matched with the inverted cone shoulder; a pressing cap is arranged on the top of the valve cover; a bearing is sleeved on the valve rod; a packing gland is arranged below the bearing; a packing cavity is arranged between the valve rod and the valve cover; the packing cavity is filled with sealing packing; the lower end of the packing gland extends into the packing cavity; a sealing grease injection valve is arranged on the valve cover and is communicated with the filling cavity; the grease injector is arranged on the valve cover and is communicated with the filling cavity through an upward grease injection hole arranged on the valve cover.
2. The high performance expansion gate valve with the back sealing function according to claim 1, wherein a pressing ring extending radially outward of the valve stem is provided on the valve stem; the bearing is two, is located the upper and lower both sides of clamping ring.
3. The high-performance expansion gate valve with a back sealing function according to claim 1, wherein a circular gate hole is provided in the gate plate.
4. The high-performance expansion gate valve with the inverted sealing function according to claim 3, wherein the sealing packing comprises a V-shaped packing, a packing spacer ring and a packing seal ring; the packing sealing ring, the packing spacer ring and the V-shaped packing are sequentially superposed from bottom to top; the V-shaped packing is of a V-shaped ring structure; the packing sealing ring is of a circular ring structure with an annular lip at the lower end; and a metal support piece is arranged in the annular lip of the packing seal ring.
5. The high-performance expansion gate valve with the inverted sealing function according to claim 4, wherein a plurality of V-shaped packing sets are stacked on each other; the packing gland is pressed on the V-shaped packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920687136.2U CN210661437U (en) | 2019-05-14 | 2019-05-14 | High-performance expansion gate valve with inverted sealing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920687136.2U CN210661437U (en) | 2019-05-14 | 2019-05-14 | High-performance expansion gate valve with inverted sealing function |
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| Publication Number | Publication Date |
|---|---|
| CN210661437U true CN210661437U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920687136.2U Active CN210661437U (en) | 2019-05-14 | 2019-05-14 | High-performance expansion gate valve with inverted sealing function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118264A (en) * | 2019-05-14 | 2019-08-13 | 苏州博雷特流体控制有限公司 | A method of the high-performance expansion sluice valve with back seal function and replacement filler |
-
2019
- 2019-05-14 CN CN201920687136.2U patent/CN210661437U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118264A (en) * | 2019-05-14 | 2019-08-13 | 苏州博雷特流体控制有限公司 | A method of the high-performance expansion sluice valve with back seal function and replacement filler |
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