阅读说明：本技术 一种pe球阀 (PE ball valve ) 是由 何浩南 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种PE球阀,涉及球阀技术领域,包括一阀体、一阀球、一阀杆、一左端管和一右端管,所述阀体包括外阀体和内阀体,所述左端管和右端管分别与阀体两侧对接；所述左端管包括同轴设置的左外管、左内管和左环形对接体,所述右端管包括同轴设置的右外管、右内管和右环形对接体。本发明为了解决现有PE球阀没有双层功能的问题,提出一种具有双层功能的PE球阀。(The invention discloses a PE ball valve, which relates to the technical field of ball valves and comprises a valve body, a valve ball, a valve rod, a left end pipe and a right end pipe, wherein the valve body comprises an outer valve body and an inner valve body; the left end pipe comprises a left outer pipe, a left inner pipe and a left annular butt joint body which are coaxially arranged, and the right end pipe comprises a right outer pipe, a right inner pipe and a right annular butt joint body which are coaxially arranged. The invention provides a PE ball valve with a double-layer function, aiming at solving the problem that the conventional PE ball valve does not have the double-layer function.)

1. The utility model provides a PE ball valve, includes a valve body (1), a valve ball (2), a valve rod (3), a left end pipe (4) and a right end pipe (5), its characterized in that:

the valve body (1) comprises an outer valve body (101) and an inner valve body (102), a valve cavity a (103) is arranged in the outer valve body (101), a valve cavity b (104) is arranged in the inner valve body (102), the inner valve body (102) is arranged in the valve cavity a (103) of the outer valve body (101), the central axis of the valve cavity a (103) is parallel to the central axis of the valve cavity b (104), and an interlayer cavity (105) is formed between the outer wall of the inner valve body (102) and the inner wall of the outer valve body (101);

the valve ball (2) is arranged in a valve cavity b (104) of the inner valve body (102), a fluid on-off hole (201) is formed in the valve ball (2), two annular positioning seats (6) used for positioning the valve ball (2) are arranged in the valve cavity b (104), the two annular positioning seats (6) are respectively arranged on two sides of the valve ball (2), a valve rod positioning hole a (105) is formed in the outer valve body (101) in a penetrating mode and penetrates through the inner wall and the outer wall, a valve rod positioning hole b (106) is formed in the inner valve body (102) in a penetrating mode, one end of the valve rod (3) is located on the outer side of the outer valve body (101), and the other end of the valve rod (3) sequentially penetrates through the valve rod positioning hole a (105) and the valve rod;

the left end pipe (4) and the right end pipe (5) are respectively butted with two sides of the valve body (1);

the left end pipe (4) comprises a left outer pipe (401), a left inner pipe (402) and a left annular butt joint body (403) which are coaxially arranged, one side of the left annular butt joint body (403) is fixedly provided with the left outer pipe (401) and the left inner pipe (402), the other side of the left annular butt joint body is in butt joint with the valve body (1), one ends of the left outer pipe (401) and the left inner pipe (402) are fixedly sealed with the left annular butt joint body (403), the left inner pipe (402) is positioned in a pipe cavity of the left outer pipe (401), the pipe cavity of the left inner pipe (402) is a left fluid cavity (404), a left pressure maintaining cavity (405) is formed between the outer wall of the left inner pipe (402) and the inner wall of the left outer pipe (401), and a left fluid hole (406) for communicating the left fluid cavity (404) with the fluid on-off hole (201) and a left communication hole (407) for communicating the left pressure maintaining cavity (405;

right-hand member pipe (5) are including right outer tube (501), right inner tube (502) and the right annular butt joint body (503) of coaxial setting, one side of right annular butt joint body (503) is fixed with right outer tube (501) and right inner tube (502), opposite side and valve body (1) butt joint, right outer tube (501) and right inner tube (502) all one end with right annular butt joint body (503) sealed fixed and right inner tube (502) are located the lumen of right outer tube (501), the lumen of right inner tube (502) is right fluid chamber (504), form a right pressure chamber (505) between right inner tube (502) outer wall and right outer tube (501) inner wall, be equipped with right fluid hole (506) that are used for communicateing right fluid chamber (504) and fluid break-make-break hole (201) on right annular butt joint body (503) and be used for communicateing right communication hole (507) of right pressure chamber (505) and intermediate layer cavity (105).

2. A PE ball valve according to claim 1, wherein: the valve rod (3) comprises an upper valve rod (301), a connector (302) and a lower valve rod (303) from top to bottom, a sliding sleeve (7) is coaxially embedded in the valve rod positioning hole a (105), the lower opening of the sliding sleeve (7) is communicated with the interlayer cavity (105), the connector (302) is arranged in the sliding sleeve (7), the connector (302) is in movable sealing fit with the sliding sleeve (7), an upper valve rod clamping groove (304) is arranged at the upper end of the connector (302), a lower valve rod clamping groove (305) is arranged at the lower end of the connector (302), the upper valve rod (301) is rotatably connected with the valve rod positioning hole a (105), an upper polygonal clamping head (306) matched with the upper valve rod clamping groove (304) is arranged at the lower end of the upper valve rod (301), the lower end of the upper polygonal clamping head (306) extends into the upper valve rod clamping groove (304), and the upper polygonal clamping head (306) is in up-and-down sliding fit with the upper valve rod clamping groove (304); the lower valve rod (303) is rotatably connected with the valve rod positioning hole b (106), the lower end of the lower valve rod (303) is connected with the valve ball (2), a lower polygonal clamping head (307) matched with the lower valve rod clamping groove (305) is arranged at the upper end of the lower valve rod (303), when the connector (302) is located at the lowest limit position, the lower polygonal clamping head (307) is connected with the lower valve rod clamping groove (305) in an inserting mode, and when the connector (302) is located at the highest limit position, the lower polygonal clamping head (307) is disconnected with the lower valve rod clamping groove (305); the upper end of the connector (302) is provided with a spring (8) used for pressing down the connector (302).

3. A PE ball valve according to claim 2, wherein: the cross section of the upper polygonal clamping head (306) is a regular hexagon, and the cross section of the lower polygonal clamping head (307) is a regular hexagon.

4. A PE ball valve according to claim 2, wherein: the outer side walls of the left outer pipe (401), the left inner pipe (402), the right outer pipe (501) and the right inner pipe (502) are all annularly cut with steps for positioning the pipe fittings.

5. A PE ball valve according to claim 1, wherein: the left outer pipe (401), the left inner pipe (402) and the left annular butt joint body (403) of the left end pipe (4) are integrally formed, and the right outer pipe (501), the right inner pipe (502) and the right annular butt joint body (503) of the right end pipe (5) are integrally formed.

Technical Field

The invention relates to the technical field of ball valves, in particular to a PE ball valve.

Background

PE refers to polyethylene, PE ball valves and PE pipe fittings are common parts in oil pipe networks, natural gas pipe networks and water conservancy pipe networks, and the pipe fitting valve made of the material has the advantages of convenience in installation, strong corrosion resistance and the like.

The conventional pipe network laying uses single-layer pipe fittings, and the single-layer pipe fittings are difficult to monitor if fluid leakage occurs in the using process, so the double-layer pipe fittings are more and more popular at present. The inner pipe of the double-layer pipe fitting is used for fluid transportation, the interlayer between the inner pipe and the outer pipe is used for inflation and pressure maintaining monitoring, and whether the inner pipe leaks or not is judged by monitoring the air pressure change in the interlayer. The double-layer pipe fitting is through selecting for use the pipe fitting of two kinds of different diameters, and the endotheca is established and can be realized, but current ball valve can't realize double-deck function, especially PE ball valve, it adopts several parts hot melt butt joint to form, and technology is more restricted, so the junction of present pipe fitting and ball valve also often is double-layer pipe fitting pressurize interbedded truncation department, and the ball valve both sides must regard as two pressurize intermediate layer cavity to monitor, and this is more restricted to the use occasion, simultaneously, also increased not few economic cost for later stage control dimension guarantor.

Disclosure of Invention

The invention provides a PE ball valve with a double-layer function, aiming at solving the problem that the conventional PE ball valve does not have the double-layer function.

In order to achieve the purpose, the invention adopts the following technical scheme: a PE ball valve comprises a valve body, a valve ball, a valve rod, a left end pipe and a right end pipe,

the valve body comprises an outer valve body and an inner valve body, a valve cavity a is arranged in the outer valve body, a valve cavity b is arranged in the inner valve body, the inner valve body is arranged in the valve cavity a of the outer valve body, the central axis of the valve cavity a is parallel to the central axis of the valve cavity b, and an interlayer cavity is formed between the outer wall of the inner valve body and the inner wall of the outer valve body;

the valve ball is arranged in a valve cavity b of the inner valve body, a fluid on-off hole is formed in the valve ball, two annular positioning seats for positioning the valve ball are arranged in the valve cavity b and are respectively arranged at two sides of the valve ball, a valve rod positioning hole a is formed in the outer valve body in a penetrating mode and penetrates through the inner wall and the outer wall, a valve rod positioning hole b is formed in the inner valve body in a penetrating mode and penetrates through the inner wall and the outer wall, one end of the valve rod is located on the outer side of the outer valve body, and the other end of the valve rod sequentially penetrates through the;

the left end pipe and the right end pipe are respectively butted with two sides of the valve body;

the left end pipe comprises a left outer pipe, a left inner pipe and a left annular butt joint body which are coaxially arranged, one side of the left annular butt joint body is fixedly provided with the left outer pipe and the left inner pipe, the other side of the left annular butt joint body is in butt joint with the valve body, one end of each of the left outer pipe and the left inner pipe is fixedly sealed with the left annular butt joint body, the left inner pipe is positioned in a pipe cavity of the left outer pipe, the pipe cavity of the left inner pipe is a left fluid cavity, a left pressure-maintaining cavity is formed between the outer wall of the left inner pipe and the inner wall of the left outer pipe, and a left fluid hole for communicating the left fluid cavity with the fluid on-off hole and;

the right-hand member pipe is including the right outer tube, the right inner tube and the right annular butt joint body of coaxial setting, one side of right annular butt joint body is fixed with right outer tube and right inner tube, opposite side and valve body butt joint, the equal one end of right outer tube and right inner tube is fixed with right annular butt joint body seal and right inner tube is located the lumen of right outer tube, and the lumen of right inner tube is right fluid chamber, forms a right pressure chamber between right inner tube outer wall and the right outer tube inner wall, is equipped with the right fluid hole that is used for communicateing right fluid chamber and fluid break-make hole on the right annular butt joint body and is used for communicateing right pressure chamber and intermediate layer cavity's right intercommunicating pore.

Preferably, the valve rod comprises an upper valve rod, a connector and a lower valve rod from top to bottom, a sliding sleeve is coaxially embedded in the valve rod positioning hole a, a lower opening of the sliding sleeve is communicated with the interlayer cavity, the connector is arranged in the sliding sleeve, the connector and the sliding sleeve are in movable sealing fit, an upper valve rod clamping groove is formed in the upper end of the connector, a lower valve rod clamping groove is formed in the lower end of the connector, the upper valve rod is rotatably connected with the valve rod positioning hole a, an upper polygonal clamping head matched with the upper valve rod clamping groove is arranged at the lower end of the upper valve rod, the lower end of the upper polygonal clamping head extends into the upper valve rod clamping groove, and the upper polygonal clamping head and the upper valve rod clamping groove are in vertical sliding fit; the lower valve rod is rotatably connected with the valve rod positioning hole b, the lower end of the lower valve rod is connected with the valve ball, the upper end of the lower valve rod is provided with a lower polygonal clamping head matched with the lower valve rod clamping groove, when the connector is located at the lowest limit position, the lower polygonal clamping head is connected with the lower valve rod clamping groove in an inserting mode, and when the connector is located at the highest limit position, the lower polygonal clamping head is disconnected with the lower valve rod clamping groove; the upper end of the connector is provided with a spring for pressing the connector downwards.

Preferably, the cross section of the upper polygonal chuck is a regular hexagon, and the cross section of the lower polygonal chuck is a regular hexagon.

Preferably, steps for positioning the pipe fittings are annularly cut on the outer side walls of the left outer pipe, the left inner pipe, the right outer pipe and the right inner pipe.

Preferably, the left outer pipe, the left inner pipe and the left annular butt joint body of the left end pipe are integrally formed, and the right outer pipe, the right inner pipe and the right annular butt joint body of the right end pipe are integrally formed.

Therefore, the invention has the following beneficial effects: 1. the valve body is arranged into the outer valve body and the inner valve body, and the left end pipe and the right end pipe are also arranged into two layers, so that when the left end and the right end of the double-layer pipe fitting are respectively butted with the double-layer pipe fitting, pressure maintaining interlayer cavities of the double-layer pipe fitting at two sides can be communicated, and the double-layer pipe fitting can be monitored only by one monitoring device, thereby saving the cost; 2. design into the syllogic with the valve rod, go up valve rod, connector and lower valve rod promptly, when the inner tube of double-deck pipe fitting took place to leak, atmospheric pressure rising in the pressurize intermediate layer cavity can drive the connector and shift up, finally makes to break away from between connector and the lower valve rod, can play the condition of reminding operating personnel to take place to leak, when can effectively preventing again that the pipe fitting from leaking, operating personnel opened and close the operation to the PE ball valve again.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a cross-sectional view of the inside of the valve body in the present invention.

Fig. 4 is a schematic view of the structure of the left-end tube in the present invention.

FIG. 5 is a schematic view of the left end tube of the present invention at another angle.

Fig. 6 is an enlarged view at a in fig. 3.

Fig. 7 is an exploded view of the valve stem of the present invention.

Fig. 8 is an exploded view of another angle of the valve stem of the present invention.

Fig. 9 is a structural state diagram of the present invention when the inner pipe of the double-layer pipe network leaks.

Fig. 10 is an enlarged view at b in fig. 9.

1: a valve body; 101: an outer valve body; 102: an inner valve body; 103: a valve cavity a; 104: a valve cavity b; 105: a valve rod positioning hole a; 106: a valve rod positioning hole b; 2: a valve ball; 201: a fluid make-and-break aperture; 3: a valve stem; 301: an upper valve stem; 302: a connector; 303: a lower valve stem; 304: an upper valve rod clamping groove; 305: a lower valve rod clamping groove; 306: a polygonal clamping head is arranged; 307: a lower polygonal chuck; 4: a left end tube; 401: a left outer tube; 402: a left inner tube; 403: a left annular abutment; 404: a left fluid chamber; 405: a left pressure retention chamber; 406: a left fluid aperture; 407: a left communication hole; 5: a right end tube; 501: a right outer tube; 502: a right inner tube; 503: a right annular abutment; 504: a right fluid chamber; 505: a right pressure retention chamber; 506: a right fluid aperture; 507: a right communication hole; 6: an annular positioning seat; 7: a sliding sleeve; 8: a spring; 9: an outer tube; 10: an inner tube; 11: double-deck pipe fitting pressurize intermediate layer.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 10, a PE ball valve includes a valve body 1, a valve ball 2, a valve rod 3, a left end pipe 4 and a right end pipe 5.

The valve body 1 comprises an outer valve body 101 and an inner valve body 102, a valve cavity a103 is arranged in the outer valve body 101, a valve cavity b104 is arranged in the inner valve body 102, the inner valve body 102 is arranged in the valve cavity a103 of the outer valve body 101, the central axis of the valve cavity a103 is parallel to the central axis of the valve cavity b104, and a sandwich cavity 105 is formed between the outer wall of the inner valve body 102 and the inner wall of the outer valve body 101.

The valve ball 2 is arranged in a valve cavity b104 of the inner valve body 102, a fluid on-off hole 201 is formed in the valve ball 2, two annular positioning seats 6 used for positioning the valve ball 2 are arranged in the valve cavity b104, the two annular positioning seats 6 are respectively arranged on two sides of the valve ball 2, the annular positioning seats 6 are fixed with the inner wall of the valve cavity b104 in a sealing mode, and a valve ball sealing ring is arranged on one side, facing the valve ball 2, of the annular positioning seats 6. A valve rod positioning hole a105 is formed in the outer valve body 101 in a penetrating mode and penetrates through the inner wall and the outer wall, a valve rod positioning hole b106 is formed in the inner valve body 102 in a penetrating mode, one end of the valve rod 3 is located on the outer side of the outer valve body 101, the other end of the valve rod 3 penetrates through the valve rod positioning hole a105 and the valve rod positioning hole b106 in sequence and is connected with the valve ball 2, and the valve ball 2 is driven to rotate through the valve rod 3.

The left end pipe 4 and the right end pipe 5 are respectively butted with two sides of the valve body 1.

The left end pipe 4 comprises a left outer pipe 401, a left inner pipe 402 and a left annular butt joint body 403 which are coaxially arranged, one side of the left annular butt joint body 403 is fixedly provided with a left outer pipe 401 and a left inner pipe 402, the other side of the left annular butt joint body is in butt joint with the valve body 1, one ends of the left outer pipe 401 and the left inner pipe 402 are fixedly sealed with the left annular butt joint body 403, the left inner pipe 402 is positioned in a pipe cavity of the left outer pipe 401, a pipe cavity of the left inner pipe 402 is a left fluid cavity 404, a left pressure maintaining cavity 405 is formed between the outer wall of the left inner pipe 402 and the inner wall of the left outer pipe 401, and a left fluid hole 406 for communicating the left fluid cavity 404 with the fluid on-off hole 201 and a left communication hole 407.

The right end pipe 5 comprises a right outer pipe 501, a right inner pipe 502 and a right annular butt joint body 503 which are coaxially arranged, one side of the right annular butt joint body 503 is fixedly provided with a right outer pipe 501 and a right inner pipe 502, the other side of the right annular butt joint body is in butt joint with the valve body 1, one end of each of the right outer pipe 501 and the right inner pipe 502 is fixedly sealed with the right annular butt joint body 503, the right inner pipe 502 is positioned in a pipe cavity of the right outer pipe 501, a pipe cavity of the right inner pipe 502 is a right fluid cavity 504, a right pressure maintaining cavity 505 is formed between the outer wall of the right inner pipe 502 and the inner wall of the right outer pipe 501, and a right fluid hole 506 for communicating the right fluid cavity 504 with the fluid on-off hole 201 and a right communication hole.

One end of the outer valve body 101 is hermetically fixed with the left annular butt-joint body 403, and the other end is hermetically fixed with the right annular butt-joint body 503; one end of the inner valve body 102 is fixed with the left annular butt-joint body 403 in a sealing way, and the other end is fixed with the right annular butt-joint body 503 in a sealing way.

The valve rod 3 comprises an upper valve rod 301, a connector 302 and a lower valve rod 303 from top to bottom, a sliding sleeve 7 is coaxially embedded in the valve rod positioning hole a105, a lower opening of the sliding sleeve 7 is communicated with the interlayer cavity 105, the connector 302 is arranged in the sliding sleeve 7, the connector 302 is in movable sealing fit with the sliding sleeve 7, the connector 302 can slide up and down in the sliding sleeve 7 and also can rotate along the central axis of the connector 302, an upper valve rod clamping groove 304 is arranged at the upper end of the connector 302, a lower valve rod clamping groove 305 is arranged at the lower end of the connector 302, the upper valve rod 301 is rotatably connected with the valve rod positioning hole a105, the upper valve rod 301 cannot move up and down, an upper polygonal clamping head 306 matched with the upper valve rod clamping groove 304 is arranged at the lower end of the upper valve rod 301, the broken section of the upper polygonal clamping head 306 is in a regular hexagon, the lower end of the upper polygonal clamping head 306 extends into the upper valve rod clamping groove 304, and the upper polygonal clamping head 306, when the connector 302 slides up and down, the upper polygonal clamping head 306 and the upper valve rod clamping groove 304 cannot be separated; the lower valve rod 303 is rotatably connected with the valve rod positioning hole b106, the lower valve rod 303 cannot move up and down, the lower end of the lower valve rod 303 is connected with the valve ball 2, the lower valve rod 303 drives the valve ball 2 to rotate, the upper end of the lower valve rod 303 is provided with a lower polygonal clamping head 307 matched with the lower valve rod clamping groove 305, the cross section of the lower polygonal clamping head 307 is a regular hexagon, when the connector 302 is located at the lowest limit position, the lower polygonal clamping head 307 is connected with the lower valve rod clamping groove 305 in an inserting mode, when the connector 302 is located at the highest limit position, the lower polygonal clamping head 307 is disconnected with the lower valve rod clamping groove 305, and the upper end of the connector 302 is provided with a spring 8 for pressing the connector 302 downwards.

The outer side walls of the left outer pipe 401, the left inner pipe 402, the right outer pipe 501 and the right inner pipe 502 are all annularly cut with steps for positioning pipe fittings.

The left outer pipe 401, the left inner pipe 402 and the left annular butt-joint body 403 of the left end pipe 4 are integrally formed, and the right outer pipe 501, the right inner pipe 502 and the right annular butt-joint body 503 of the right end pipe 5 are integrally formed.

When the double-layer pipe pressure maintaining interlayer 11 is used in a double-layer pipe network, the left inner pipe 402 and the right inner pipe 502 are in butt joint with the inner pipe 10 of the double-layer pipe network, the left outer pipe 401 and the right outer pipe 501 are in butt joint with the outer pipe 9 of the double-layer pipe network, a double-layer pipe pressure maintaining interlayer 11 is formed between the inner pipe 10 in butt joint with the left inner pipe 402 and the outer pipe 9 in butt joint with the left outer pipe 401, and a double-layer pipe pressure maintaining interlayer 11 is also formed between the inner pipe 10 in butt joint with the right inner pipe 502 and the outer pipe 9 in butt joint with the right outer pipe 501.

Meanwhile, when the inner pipe 10 leaks, the fluid in the inner pipe 10 enters the double-layer pipe pressure maintaining interlayer 11, so that the air pressure in the double-layer pipe pressure maintaining interlayer 11 is increased, because the double-layer pipe pressure maintaining interlayer 11 is communicated with the interlayer cavity 105, the air pressure in the interlayer cavity 105 is also increased, the lower opening of the sliding sleeve 7 is also communicated with the interlayer cavity 105, when the air pressure in the interlayer cavity 105 is increased to a certain value, the connector 302 in the sliding sleeve 7 is pushed to move upwards, the spring 8 is compressed in the process of moving upwards the connector 302, and finally the connector 302 is separated from the lower valve rod 303 as shown in figures 9 and 10, at the moment, even if an operator rotates the upper valve rod 301, the lower valve rod 303 and the valve ball 2 cannot rotate along with the upper valve rod 301, and by the design, the leakage of the inner pipe 10 can be reminded to the operator, and when the inner pipe 10 is effectively prevented from leaking, the operator opens and closes the valve ball, with adverse consequences.