CN215673682U - PE gas ball valve - Google Patents
PE gas ball valve Download PDFInfo
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- CN215673682U CN215673682U CN202120185945.0U CN202120185945U CN215673682U CN 215673682 U CN215673682 U CN 215673682U CN 202120185945 U CN202120185945 U CN 202120185945U CN 215673682 U CN215673682 U CN 215673682U
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Abstract
The utility model discloses a PE gas ball valve which comprises a valve body, wherein end pipes are connected to two sides of the valve body, a cavity communicated with the end pipes is formed in the valve body, a ball core is arranged in the cavity, a valve rod is inserted into the top of the ball core, the top end of the valve rod penetrates through the valve body and is connected with a rotary connection seat, a rotating shaft is fixed to the bottom of the ball core, the bottom of the rotating shaft is inserted into a bearing ring at the bottom of the valve body, a ball core sealing ring is installed on one side, close to the ball core, of the end pipe, and the contact surface of the ball core sealing ring and the ball core is an inclined surface. The utility model adopts a fixed ball core structure and has a large sealing surface, thereby effectively reducing the opening and closing operation torque of the valve, enhancing the sealing performance and leading the ball valve to have the functions of easy operation and internal leakage prevention.
Description
Technical Field
The utility model relates to the technical field of buried Polyethylene (PE) pipeline systems for gas, in particular to a PE gas ball valve with low torque and strong sealing.
Background
Compared with the traditional metal valve, the PE ball valve has the characteristics of light weight, corrosion resistance, maintenance free, small opening and closing torque, small volume, small occupied area and the like, is convenient to install and simple to use due to the matching of the PE ball valve and the PE pipe material, and is widely used in the urban PE gas pipe network. However, in practical use, it is often found that a ball valve in a PE gas pipe network which is put into operation is scrapped due to internal leakage, damage of a large opening and closing torque part, or incapability of opening and closing, so that normal operation of the gas pipe network is affected, and the operation cost of a gas enterprise is increased.
The current ball valve design does not solve the above problems, for example, chinese patent publication No. CN108708986A, publication No. 2018.10.26: the utility model provides a PE gas ball valve of belted steel skeleton, this patent has only strengthened the internal corrosivity of ball valve from structural strength, does not solve leak in the ball valve, or because open and close the part damage that the moment of torsion is big and cause, or because can't open and close and condemned problem. Structurally, the PE ball valve belongs to a floating ball valve, and is basically not influenced by internal force under the condition of full opening. However, when the ball valve is closed, the ball core is subjected to the action of axial force and can move relatively in the axial direction along the valve body, so that the sealing ring and the valve seat are extruded in one direction, the elasticity of the sealing ring is influenced, and the retainer ring on the valve seat generates creep deformation, wherein the larger the force is, the larger the displacement of the ball core is, the larger the creep deformation amount of the retainer ring is, and the larger the opening torque of the ball core is; the valve is in a static state for a long time, the static inertia is very large, and the operation torque required at the opening and closing moment is also very large; the sealing seat is pressed for a long time, the sealing seat can be slightly changed and gradually fatigued, the trace is accumulated for a long time, and the internal leakage phenomenon can possibly occur in the low-pressure state; when solid particles exist in a pipeline, the solid particles can be adhered to the surface of the ball core or the sealing ring in the operation process, the ball core can be clamped during operation, the ball core cannot rotate, or the surface of the ball core is scratched, the sealing ring is damaged, the sealing performance of the ball core and the sealing ring is reduced or the sealing ring cannot be sealed, and therefore internal leakage of the ball valve is caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects, the utility model researches and applies the operation torque and the sealing performance of the PE gas ball valve, and provides the PE gas ball valve which adopts a fixed ball core structure and has a large sealing surface, thereby effectively reducing the opening and closing operation torque of the valve, enhancing the sealing performance and enabling the ball valve to have the functions of easy operation and internal leakage prevention.
The technical scheme of the utility model is as follows:
the utility model provides a PE gas ball valve, includes the valve body, the both sides of valve body all are connected with the end pipe, the valve body be equipped with the communicating cavity of end pipe, be equipped with the ball core in the cavity, the top of ball core is pegged graft and is had the valve rod, the top of valve rod is worn out the valve body is connected with the rotary joint seat, the bottom of ball core is fixed with the pivot, the bottom of pivot inserts in the bearing ring of valve body bottom, the end pipe is close to one side of ball core is installed the ball core sealing washer, the ball core sealing washer with the contact surface of ball core is the inclined plane.
The valve rod can be directly inserted into the ball core from the outside and is matched with the ball core with high precision, so that the ball core and the valve rod have good coaxiality, the bottom of the ball core is fixed in the valve body through the rotating shaft, the ball core forms a fixed ball core structure in the valve body and can only rotate around the rotating shaft in an opening and closing mode, the required operation torque is reduced, the operation is easy, and meanwhile, the sealing ring fatigue caused by long-term pressure of the ball core sealing ring due to the displacement of the ball core is avoided; the contact surface of the ball core sealing ring and the ball core is designed into an inclined plane, so that the contact area of the ball core and the ball core sealing ring is increased, the rotation transition performance of the ball core is enhanced, inner leakage can be effectively prevented, and the sealing effect is improved.
Furthermore, the end pipe is provided with a support ring on the inner side of the ball core sealing ring, and a deformation clearance groove on the outer side. The support ring is used for supporting the ball core sealing ring, so that the ball core sealing ring is stably installed, the deformation clearance groove enables the ball core sealing ring to have a good elastic deformation state all the time, and the fatigue service life of the rubber ring is prolonged.
Further, the end pipe is provided with a first mounting groove for mounting the support ring and a second mounting groove for mounting the ball core sealing ring, the outer wall of the support ring is abutted to the inner wall annular surface on one side of the ball core sealing ring, and the inner wall on the other side of the ball core sealing ring is an outward inclined surface and is in surface contact with the ball core.
According to the unique large-inclined-plane sealing structure designed by the utility model, the glue thickness of the inclined plane of the ball core sealing ring is gradually transited from thin to thick, the thin local compression force is small, and the large local compression force is large, so that the large sealing force required under a high-pressure state is ensured, the width of the sealing surface in contact with the ball core is increased under the condition of not increasing excessive compression force, and the leakage amount can be effectively avoided or reduced by increasing the width of the sealing surface.
Furthermore, a slot for installing the valve rod is formed in the ball core, the slot is a key slot, and the insertion end of the valve rod is in a flat key shape matched with the key slot. The valve rod is directly inserted into the key groove for matching by adopting a flat key type insertion end, so that the valve rod has no shoulder, the valve rod can be installed and inserted into the ball core from the outside, the high-precision matching of the ball core and the valve rod is realized, and the ball core and the valve rod both have good coaxiality; meanwhile, the matching area of the valve rod and the ball core is large, the stress area of the ball core and the valve rod is increased, and the ball core and the valve rod can work well under the condition that the ball core and the valve rod are subjected to high-strength torsion or shearing force.
Furthermore, conduction grooves communicated with the interior of the ball core are formed in four corners of the key groove. The conduction grooves at four corners ensure that the whole cavity of the ball valve is in gas communication, so that the ball core is in a better pressure stabilizing condition, and the opening and closing of the valve are facilitated.
Furthermore, a mounting hole is formed above the insertion end of the valve rod, and a separation-preventing shaft is mounted in the mounting hole. The valve rod is provided with the anti-slip shaft to replace a shoulder, so that the anti-slip function of the shoulder can be realized, the friction force of the anti-slip position between the valve rod and the main body is reduced, and the operation torque is reduced.
Furthermore, a plurality of mounting grooves are formed in the upper portion of the insertion end of the valve rod, valve rod sealing rings used for sealing the valve body are placed in the mounting grooves, and the sealing performance of the valve body and the valve rod is guaranteed.
Further, the bottom of ball core is offered and is used for the installation the shaft hole of pivot, be equipped with in the shaft hole and be used for fixing the anti-slip ring of pivot, the phenomenon of deviating from can not take place under the anti-slip environmental protection card pivot running condition.
Furthermore, the valve rod, the ball core and the rotating shaft are made of self-lubricating POM materials and are processed by low friction coefficients, so that the opening and closing operation torque of the ball valve can be effectively reduced, and good installation precision and sealing performance are guaranteed.
Further, the valve body and the end pipes arranged on two sides of the valve body are welded together through an automatic hot melt welding machine.
The utility model has the beneficial effects that:
the valve rod of the utility model has no shoulder, the valve rod can be directly inserted into the ball core from the outside, the high-precision matching of the ball core and the valve rod is realized, the matching clearance of each surface of the valve rod and the ball core is small, the ball core and the valve rod in any direction have good coaxiality under the condition of air pressure, the bottom of the ball core is also fixed in the valve body through the rotating shaft, so that the ball core forms a fixed ball core structure in the valve body and can only rotate around the rotating shaft in an opening and closing way, the change of torque is made compared with the traditional floating ball valve, the torque required to operate is reduced, the operation is easy, and meanwhile, the sealing ring fatigue caused by the long-term pressure of the ball core sealing ring due to the displacement of the ball core is avoided; the utility model also designs the contact surface of the ball core sealing ring and the ball core into a special and wide large inclined surface for matching, increases the width of the contact surface of the ball core and the ball core sealing ring, does not need to increase the burden of the sealing ring, ensures that the ball core has good rotation transition property, effectively prevents internal leakage, and improves the sealing effect under low pressure and high pressure.
Drawings
FIG. 1 is a schematic cross-sectional view of a PE gas ball valve;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is another schematic angular cross-sectional view of FIG. 1;
FIG. 4 is an exploded view of a PE gas ball valve;
FIG. 5 is an enlarged schematic view of portion B of FIG. 4;
FIG. 6 is a schematic view of the operational forces of a floating ball valve;
FIG. 7 is a schematic view of the operational stress of the fixed ball valve of the present invention;
in the figure: the valve comprises a valve body 1, an end pipe 2, a deformation clearance groove 201, a ball core 3, a key groove 301, a conduction groove 302, a valve rod 4, a rotary joint seat 5, a rotating shaft 6, a bearing ring 7, a ball core sealing ring 8, an inclined plane 801, a support ring 9, a release-preventing shaft 10, a valve rod sealing ring 11 and a release-preventing ring 12.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1-5, a PE gas ball valve comprises a valve body 1, both sides of the valve body 1 are connected with end pipes 2, the valve body 1 and the end pipes 2 arranged on both sides of the valve body 1 are welded together by an automatic hot-melt welding machine, the valve body 1 is provided with a cavity communicated with the end pipes 2, a ball core 3 is arranged in the cavity, the top of the ball core 3 is provided with a valve rod 4, the ball core 3 is provided with a slot for installing the valve rod 4, the slot is a key slot 301, an insertion end of the valve rod 4 is a flat key type matched with the key slot 301, the top of the valve rod 4 penetrates out of the valve body 1 and is connected with a screwing seat 5, the bottom of the ball core 3 is fixed with a rotating shaft 6, the bottom of the rotating shaft 6 is inserted into a bearing ring 7 at the bottom of the valve body 1, one side of the end pipe 2 close to the ball core 3 is provided with a ball core sealing ring 8, the end pipe 2 is provided with a support ring 9 on the inner side of the ball core sealing ring 8, the outer side is provided with a deformation clearance groove 201, the end pipe 2 is provided with a first installation groove for installing the support ring 9, And the outer wall of the support ring 9 is abutted against the annular surface of the inner wall on one side of the ball core sealing ring 8, and the inner wall on the other side of the ball core sealing ring 8 is an outward inclined surface 801 and is in contact with the surface of the ball core 3.
Referring to fig. 1 and 3, in the present embodiment, the valve rod 4 has no shoulder, the ball core 3 and the key groove 301 are designed to be straight-through, the valve rod 4 can be directly inserted into the top of the ball core 3 through the key groove 301 to realize high-precision matching with the ball core 3, the matching gap between the two surfaces can be controlled within 0.05mm, and the ball core 3 and the valve rod 4 can have good coaxiality in any direction under the condition of air pressure; meanwhile, the matching area is large, the contact stress area of the ball core 3 and the valve rod 4 is increased, and the ball core 3 and the valve rod 4 can work well under the condition of high-strength torsion or shearing force; and the bottom of the ball core 3 is fixed in the bearing ring sleeve 7 at the bottom of the valve body 1 through the rotating shaft 6, so that the ball core 3 forms a fixed ball core structure in the valve body 1, can only rotate around the rotating shaft 6 in an opening and closing manner, the torque required to operate is reduced, the operation is easy, and meanwhile, the sealing ring fatigue caused by the long-term pressure of the ball core sealing ring 8 due to the displacement of the ball core 3 is avoided.
The requirement of good assembly coaxiality of the ball core 3 and the valve rod 4 is one of important technical requirements for ensuring the quality of the valve, and because if the error of the coaxiality of the ball core 3 and the valve rod 4 is large and the fit clearance is large, the shaft core of the ball core 3 is deflected under the condition that the ball core 3 is subjected to air pressure, a torsion force with a certain angle is formed between the ball core 3 and the valve rod 4, the operation torque is increased on the contrary, and the ball core 3 is clamped under a serious condition; the deflection of the ball core 3 can also cause inconsistent compression amount at each position between the ball core sealing ring 8 and the ball core surface, the stress is uneven, and the serious condition can cause untight internal sealing to form internal leakage. General valve because the valve rod 4 leaves the circular bead, must pack into valve body hole earlier with valve rod 4, pack into valve body 1 with ball core 3 again in with valve rod 4 cooperatees, need valve rod 4 and 3 cooperation clearances of ball core great, and valve rod 4 and ball core 3 will leave sufficient clearance position and just can make ball core 3 and valve rod 4 cooperate the dress each other, in the in-service use like this, eccentric phenomenon can appear in ball core 3. In the utility model, the ball core 3 can be firstly arranged in the valve body 1 to respond, the valve rod 4 is then inserted into the corresponding matching position of the ball core 3 from the outside of the valve body 1, and the coaxiality and the matching clearance of the valve rod 4 and the ball core 3 can be completely ensured by the processing precision of numerical control processing equipment and are not influenced by assembly factors.
The matching groove designed by the utility model is a key groove 301 which is in a half-round head flat key shape, the matching groove is directly opened in the middle position of the top of the ball core 3, and the whole groove is taken as the matching surface, so that the sufficient stress contact area between the ball core 3 and the valve rod 4 is ensured.
Referring to fig. 2, in the present embodiment, the ball core sealing ring 8 and the ball core surface are designed to be matched with a unique and wide inclined surface 801, so as to increase the width of the sealing contact surface, and not increase the burden of the ball core sealing ring 8, so that the ball core 3 has good rotation transitivity, effectively prevents internal leakage, and improves the sealing effect in low-pressure and high-pressure states. The sealing performance of valve is one of the main indexes of examining valve quality, and the sealing performance of valve mainly includes two aspects, leak in and leak outward promptly, and the leak phenomenon just can not appear in the sealing performance between ball core sealing washer 8 and the ball core face is good, and 2 important factors that influence valve sealing performance are: firstly, the performance of a sealing rubber ring; width of sealing surface. The sealing rubber ring has good compressibility, elasticity and fatigue resistance, and plays a decisive role in the sealing performance of the valve, because the valve is sealed by the compression force generated by the sealing rubber ring on the compression ratio of the spherical core surface, and if the compressibility of the sealing rubber ring is not good, a sealing gap can exist between the tiny rough and uneven surfaces of the sealing surfaces; if the elasticity is poor after compression, the deformation compression force generated by elastic deformation cannot be ensured; the fatigue resistance is not good, and the service life of the valve seal cannot be ensured. The influence of the width of the sealing surface on the sealing performance of the valve is that the width determines the length of the capillary hole, when the width is increased, the movement stroke of fluid along the capillary hole is prolonged, the movement resistance is increased, and meanwhile, the abrasion of a sealing ring in the valve can be reduced by increasing the width of the sealing surface; after the width of the sealing surface is increased, the leakage stroke length is increased in proportion, so that the leakage amount can be reduced in proportion, and the leakage amount can be effectively avoided or reduced by increasing the width of the sealing surface for scratching the valve ball core and the sealing rubber ring caused by some fine dust and sand in the pipeline. According to the unique large inclined plane sealing structure designed by the utility model, the glue thickness of the inclined plane 801 at the sealing surface position of the ball core sealing ring 8 is in a gradual transition design from thin to thick, the compression force at the thin place is small, and the compression force at the large place is large, so that the large sealing force required under a high pressure state is ensured, and the width of the sealing surface is increased under the condition of not increasing excessive compression force; meanwhile, a small chamfer is designed on the inner side of the top of the ball core sealing ring 8, so that the ball core sealing surface has good guidance performance in the rotating process all the time.
Referring to fig. 2, in the present embodiment, the end pipe 2 is designed with a deformation clearance groove 201, so that the ball core sealing ring 8 always has a good elastic deformation state, and the fatigue service life of the sealing ring is prolonged. The design is that no extrusion force is formed between the inclined plane of the ball core sealing ring 8 and the end pipe 2 in the process of deforming, but the sealing is carried out by the pressure generated by the deformation of the sealing ring, so that the excessive unnecessary compression force is not increased, and meanwhile, the deformation of the whole sealing inclined plane is ensured to have a reasonable deformation clearance space, so that the ball core sealing ring 8 can be in a good use condition for a long time, and the fatigue service life of the sealing ring is prolonged.
Referring to fig. 5, in this embodiment, the four corners of the key slot 301 are provided with conduction slots 302 communicated with the inside of the ball core 3, and the conduction slots 302 at the four corners enable the whole cavity of the ball valve to be in gas communication, so that the pressure in the cavity is consistent with the pressure in the pipeline, and thus the ball core 3 can be in a balanced stress state, so that the ball core 3 is in a better pressure stabilizing condition, and the opening and closing of the valve are facilitated.
Referring to fig. 3 and 4, in the embodiment, a mounting hole is formed above the insertion end of the valve rod 4, the anti-drop shaft 10 is mounted in the mounting hole, and the anti-drop shaft 10 is mounted on the valve rod 4 to replace a shoulder, so that the anti-drop function of the shoulder can be realized, the friction force between the anti-drop shaft and the main body at the anti-drop position is reduced, and the operation torque is reduced. The utility model is a shoulder-free structure, in order to realize the function of preventing the shoulder from falling off and prevent the valve rod 4 from being rushed out of the valve body 1 under the condition of air pressure to cause leakage, the valve rod 4 is provided with a mounting hole, and a falling-off preventing shaft 10 made of stainless steel materials with high antirust treatment is mounted to ensure that the valve rod 4 cannot be rushed out, and simultaneously, the operating torque can be further reduced because the contact area between the falling-off preventing shaft 10 and the valve body 1 is much smaller than that of the shoulder.
Referring to fig. 3 and 4, in this embodiment, a plurality of mounting grooves are formed above the insertion end of the valve rod 4, and a valve rod sealing ring 11 for sealing with the valve body 1 is placed in the mounting grooves, so as to ensure the sealing performance between the valve body 1 and the valve rod 4.
Referring to fig. 3 and 4, in the embodiment, the bottom of the ball core 3 is provided with a shaft hole for installing the rotating shaft 6, a slip-off preventing ring 12 for fixing the rotating shaft 6 is arranged in the shaft hole, and the slip-off preventing ring 12 ensures that the rotating shaft 6 cannot slip off under the operation condition. The design service life of the ball valve is 50 years as that of a PE pipeline, and in order to ensure that the rotating shaft 6 cannot be separated from the bearing ring sleeve 7 in a long time and in a complex environment, the upper end of the shaft hole of the ball core 3 is provided with a separation-preventing ring 12.
In this embodiment, valve rod 4, ball core 3, pivot 6 all adopt self-lubricating POM material to through low coefficient of friction processing, can effectual reduction ball valve open and close operation moment of torsion, guarantee good installation accuracy and leakproofness. POM has certain self-lubricity, better than the lubricity of PP materials adopted by common ball cores, high strength of POM, and the beauty of "steel ball", the friction force between rotating parts of the valve is also one of important factors influencing the operation torque of the valve, the friction force has important relation with the friction coefficient of the materials, the lower the friction coefficient is, the better the lubricity of the materials is, the lower the friction force between the parts is, in order to reduce the friction coefficient of the parts, the special polishing process is carried out on the outer surfaces of the parts, so that the surface smoothness of the parts is higher. Ball core 3 and valve rod 4, the frictional force of pivot 6 is low, ball core 3 is in the cavity of valve body 1, slide about all can lightly pushing away with the hand, so also be favorable to the product equipment, the assembly precision of good control product, because the upper and lower position of ball core 3 in the cavity is fixed a position through both ends ball core sealing washer 8, in valve body 1 and end pipe 2 in the welding equipment in-process, make ball core 3 arrive the installation size position gradually under the compression of two ball core sealing washers 8, the roughness of sealed face also plays certain influence to ball valve sealing performance, this is because: when the specific pressure on the sealing surface is small and the surface roughness is high, leakage is easy, and the leakage amount needs to be avoided or reduced by increasing the compression ratio on the sealing surface.
Referring to fig. 6 and 7, in the present embodiment, to further express the change of the moment, an analysis is made with respect to the working stress of the floating ball valve and the working stress of the fixed ball valve of the present invention;
the total torque for either a floating core or a fixed core is expressed by:
MF＝MQZ1+MQZ2+MFT+MMJ
wherein M isFIs the total torque; mQZ1Is the friction torque generated by the compression of the ball core 3 to the ball core sealing ring 8; mQZ2Is the friction torque generated by the working pressure of the medium; mFTIs the friction torque of the valve rod sealing ring 11 and the valve rod 4; mMJIs the friction torque between the shoulder of the valve stem and the thrust surface.
Comparative analysis is shown in the following table:
the valve rod 4 of the utility model has no shoulder, the valve rod 4 can be inserted into the ball core 3 from the outside directly, have realized the high-accuracy cooperation of ball core 3 and valve rod 4, the cooperation clearance of each side of the two is small, under the circumstances that guarantee to receive the atmospheric pressure, the ball core 3 and valve rod 4 have good axiality in any direction, the bottom of the ball core 3 is still fixed in valve block 1 through the spindle 6, make the ball core 3 form the fixed ball core structure in the valve block 1, can only open and close and rotate around the spindle 6, make the change of the moment relative to the floating ball valve, the torque that the necessary operation reduces, easy to operate, avoid the ball core 3 displacement to the seal ring fatigue that the long-term pressure of the seal ring 8 of the ball core forms at the same time; the utility model also designs the contact surface of the ball core seal ring 8 and the ball core 3 into a special wide large inclined surface for matching, increases the width of the contact surface of the ball core 3 and the ball core seal ring 8, does not need to increase the burden of the seal ring, ensures that the ball core 3 has good rotation transition property, effectively prevents internal leakage, and improves the sealing effect under low pressure and high pressure.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. The utility model provides a PE gas ball valve, its characterized in that, includes the valve body, the both sides of valve body all are connected with the end pipe, the valve body be equipped with the communicating cavity of end pipe is equipped with the ball core in the cavity, the top of ball core is pegged graft and is had the valve rod, wear out the top of valve rod the valve body is connected with the seat of connecing soon, the bottom of ball core is fixed with the pivot, the bottom of pivot inserts in the bearing ring of valve body bottom, the end pipe is close to one side of ball core is installed the ball core sealing washer, the ball core sealing washer with the contact surface of ball core is the inclined plane, the end pipe is in the inboard of ball core sealing washer is equipped with the support ring, and the outside is equipped with the deformation and keeps away the dead slot.
2. The PE gas ball valve according to claim 1, wherein the end pipe is provided with a first mounting groove for mounting the support ring and a second mounting groove for mounting the ball core sealing ring, the outer wall of the support ring abuts against the annular surface of the inner wall on one side of the ball core sealing ring, and the inner wall on the other side of the ball core sealing ring is an outward inclined surface and contacts with the surface of the ball core.
3. The PE gas ball valve according to claim 1, wherein the ball core is provided with a slot for mounting the valve rod, the slot is a key slot, and the insertion end of the valve rod is a flat key type matched with the key slot.
4. The PE gas ball valve according to claim 3, wherein a conduction groove communicating with the inside of the ball core is formed at four corners of the key groove.
5. The PE gas ball valve according to claim 3, wherein a mounting hole is formed above the insertion end of the valve rod, and a separation-preventing shaft is mounted in the mounting hole.
6. The PE gas ball valve according to claim 3, wherein a plurality of mounting grooves are formed above the insertion end of the valve rod, and a valve rod sealing ring for sealing with the valve body is placed in each mounting groove.
7. The PE gas ball valve according to claim 1, wherein a shaft hole for mounting the rotating shaft is formed in the bottom of the ball core, and a slip-off preventing ring for fixing the rotating shaft is arranged in the shaft hole.
8. The PE gas ball valve according to claim 1, wherein the valve stem, the ball core and the rotating shaft are made of self-lubricating POM material.
9. The PE gas ball valve of claim 1, wherein the valve body is welded to the end pipes on both sides of the valve body by an automated hot melt welding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120185945.0U CN215673682U (en) | 2021-01-22 | 2021-01-22 | PE gas ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120185945.0U CN215673682U (en) | 2021-01-22 | 2021-01-22 | PE gas ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215673682U true CN215673682U (en) | 2022-01-28 |
Family
ID=79950384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120185945.0U Active CN215673682U (en) | 2021-01-22 | 2021-01-22 | PE gas ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215673682U (en) |
-
2021
- 2021-01-22 CN CN202120185945.0U patent/CN215673682U/en active Active
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