CN218440760U - Automatic blowdown filter ball valve - Google Patents

Abstract

An automatic blowdown filter ball valve, including the valve block, water inlet connector and spherical open-close piece in the valve block located in left end of valve block, the upper end of the spherical open-close piece has valve stems, the upper end of the valve stem is extended out of the valve block and equipped with the hand grip upwards, there are water outlet connectors communicated with it on the right side of valve block, there is a water pipe between water outlet connector and the right end of the said valve block; the lower surface of the water pipe is provided with a mounting hole communicated with the inner space of the water pipe; a filter joint matched with the mounting hole is arranged in the mounting hole; the upper end of the filtering joint penetrates into the water through pipe upwards, and a sealing partition plate is arranged on the right side of the upper end face of the filtering joint. The utility model discloses an automatic blowdown filter ball valve not only can make the processing degree of difficulty of filter joint become simple, does benefit to filter joint's processing, and can be at the impurity in the filter screen section of thick bamboo filtration rivers self-cleaning adhesion impurity on filter screen section of thick bamboo inner wall.

Description

Automatic blowdown filter ball valve

Technical Field

The utility model relates to a ball valve, especially an automatic blowdown filter ball valve.

Background

The filter ball valve is a ball valve that can carry out filterable to rivers, the filter ball valve is except that water supply connector and the water connectors of original, still have the filter joint who is located between water supply connector and the water connectors, install rather than assorted filter screen section of thick bamboo in the filter joint, when the ball-type closure of ball valve is opened, the water supply connector and the water connectors of ball valve link up mutually, rivers flow into the filter screen section of thick bamboo in the filter joint through water supply connector this moment, after filter screen section of thick bamboo filters, rivers finally flow from water connectors, in order to supply to use.

The traditional filter ball valve adopts copper materials, so the requirement of the filter ball valve on welding is high, the filter joint of the filter ball valve is like a water inlet joint, the water outlet joint is generally and directly machined on the valve body of the filter ball valve, when the filter joint is machined, the through between the filter joint and the water inlet joint is considered, the through between the filter joint and the water outlet joint is also considered, the machining work of the filter joint is very troublesome, and the machining work is carried out in the valve body, so the machining difficulty is high.

Meanwhile, when the filter screen cylinder filters impurities in water flow, the filter screen cylinder directly intercepts the impurities inside the filter screen cylinder through the filter holes of the filter screen cylinder, when the impurities are intercepted, part of the impurities can be adhered to the inner wall of the filter screen cylinder, the impurities on the inner wall of the filter screen cylinder can be continuously accumulated along with long-time impurity filtering, finally, the impurities on the inner wall of the filter screen cylinder can block the inner end orifices of the filter holes, so that the water flow is difficult to pass through the filter holes, the normal flow of the water flow is influenced, the filter screen cylinder needs to be taken out from the filter joint at regular time, the inner wall of the filter screen cylinder is cleaned, the filter holes on the filter screen cylinder are prevented from being blocked, and the anti-blocking mode of cleaning the filter screen cylinder at regular time is very troublesome.

Disclosure of Invention

The utility model aims to solve the current technical problem and provide an automatic blowdown filter ball valve, it not only can make the processing degree of difficulty of filter joint become simple, does benefit to filter joint's processing, and can be when the impurity in the filter screen section of thick bamboo filtration rivers self-cleaning adhesion impurity on filter screen section of thick bamboo inner wall.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model discloses an automatic blowdown filter ball valve, including the valve body, locate the water supply connector of valve body left end and locate the ball-type opening and closing piece in the valve body, ball-type opening and closing piece upper end is equipped with the valve rod, and the valve rod upper end upwards is worn out outside the valve body and is equipped with the handle, and the valve body right side is equipped with rather than the water connectors who link up mutually, its characterized in that: a water pipe is arranged between the right end of the valve body and the water outlet joint; the lower surface of the water pipe is provided with a mounting hole communicated with the inner space of the water pipe; a filter joint matched with the mounting hole is arranged in the mounting hole; the upper end of the filter joint penetrates into the water pipe upwards, and a sealing partition plate is arranged on the right side of the upper end face of the filter joint; the sealing partition plate and the filtering joint divide the inner space of the water through pipe into a left chamber communicated with the water inlet joint and a right chamber communicated with the water outlet joint; the inner space of the filtering joint is communicated with the left cavity through the upper end port of the filtering joint; the lower end of the filtering joint penetrates out of the mounting hole downwards; a sealing cover matched with the filtering joint is screwed in the port at the lower end of the filtering joint; the inner wall of the sealing cover is provided with an annular limiting step; an annular limiting part extends inwards from the edge of the port at the upper end of the filtering joint; a filter screen cylinder is arranged between the limiting part and the limiting step, and a plurality of filter holes which are uniformly distributed are arranged on the filter screen cylinder; the right side of the part of the filtering joint in the water through pipe is provided with a water through hole communicated with the inner space of the filtering joint, and the outer wall of the filtering net barrel covers the water through hole; the inner wall of the upper side of the water service pipe is provided with an automatic cleaning structure matched with the filter screen cylinder.

The automatic cleaning structure comprises a screw hole arranged on the inner wall of the upper side of the water pipe; the outer wall of the upper side of the water service pipe is provided with a sealing hole communicated with the screw hole; the lower part of the screw hole is in threaded connection with a guide rod positioned in the water pipe; the inner wall of the lower side of the sealing cover is provided with a positioning hole which is coaxial with the guide rod; a sliding seat coaxial with the guide rod is arranged at the center in the filter screen cylinder; an upper groove is formed in the center of the upper end face of the sliding seat; a lower groove is formed in the center of the lower end face of the sliding seat; the upper groove and the lower groove are communicated through a sliding hole; the diameters of the upper groove and the lower groove are larger than the diameter of the sliding hole; the lower end of the guide rod downwards sequentially penetrates through the upper groove, the sliding hole and the lower groove and penetrates into the positioning hole, and the lower end face of the guide rod is attached to the bottom of the positioning hole; the sliding seat is externally sleeved with a cleaning sleeve coaxial with the sliding seat; the inner wall of the cleaning sleeve is connected with the outer wall of the sliding seat through a plurality of supporting rods which are uniformly distributed on the circumference; the outer wall of the cleaning sleeve is provided with a plurality of cleaning plates which are uniformly distributed in the longitudinal direction, and the outer edges of the cleaning plates are attached to the inner wall of the filter screen cylinder; an upper spring sleeved outside the guide rod is arranged between the inner wall of the upper side of the water pipe and the bottom of the upper groove; a lower spring sleeved outside the guide rod is arranged between the bottom of the lower groove and the inner wall of the lower side of the sealing cover; the outer wall of the cleaning sleeve is provided with a plurality of water conveying holes positioned between adjacent cleaning plates, and the water conveying holes are communicated with the space inside the cleaning sleeve.

The upper end opening of the screw hole is in threaded connection with a screw joint matched with the screw hole; the upper end of the screw joint is provided with a sealing head which is attached to the bottom of the sealing hole; the center of the upper surface of the sealing head is provided with an inner hexagonal hole; the lower surface of the sealing head is provided with an annular first sealing groove which encloses the screw joint; and a first sealing ring matched with the first sealing groove is arranged in the first sealing groove.

At least two water conveying holes are uniformly distributed on the outer wall of the cleaning sleeve in a circumferential mode, the water conveying holes are arc-shaped, and the central angle of each water conveying hole is 90 degrees.

The thickness of the cleaning plate is gradually reduced from outside to inside.

The water pipe is made of stainless steel; the lower surface of the water service pipe is provided with an annular mounting step which is coaxial with the mounting hole and encloses the mounting hole; the outer wall of the lower end of the filtering joint is provided with a welding step which is attached to the mounting step; the installation step and the welding step are fixed through welding.

The outer wall of the sealing cover is provided with a sealing part which is attached to the lower end face of the filtering joint; the outer wall of the part where the sealing cover is in threaded connection with the port at the lower end of the filtering joint is provided with a second annular sealing groove, and the groove wall at the lower side of the second sealing groove is the upper surface of the sealing part; and a second sealing ring matched with the second sealing groove is arranged in the second sealing groove.

An annular clamping part extends downwards from the inner edge of the limiting part; the outer wall of the clamping part, the lower surface of the limiting part and the inner wall of the filter screen cylinder are enclosed to form an annular caulking groove; the lower surface of the clamping part is provided with a rubber pad which is attached to the clamping part, the rubber pad is annular, and the rubber pad is coaxial with the limiting part; an embedding part matched with the embedding groove extends upwards from the outer edge of the upper surface of the rubber pad.

The utility model has the advantages that:

compared with the prior art, adopt the utility model discloses the automatic blowdown filter ball valve of structure can process the filter joint alone when processing the valve body, treat that the filter joint processing is accomplished the back, fix it and valve body again, the processing degree of difficulty of filter joint has effectively been reduced to this kind of processing mode, do benefit to the processing of filter joint, and the fixed filter joint of perpendicular installation can guarantee the water flow area of limbers in the at utmost, realize large-traffic water service, and when utilizing self to filter the impurity in the rivers at the filter screen section of thick bamboo, the pressure that can utilize rivers automatically makes the cleaning sheet clear up the impurity of adhesion on filter screen section of thick bamboo inner wall, effectively avoid impurity constantly piling up and lead to filtering the inner condition that the downthehole mouth of a river is blockked up the influence normal flow of rivers on filter screen section of thick bamboo inner wall, meanwhile, it can utilize self elasticity to realize the relapse washing of cleaning sheet to filter screen section of thick bamboo inner wall to go up the spring down, avoid filtering the inner mouth of a river to be blockked up in the at utmost.

Drawings

FIG. 1 is a schematic structural view of an automatic blowdown filter ball valve of the present invention;

FIG. 2 is an enlarged view of section A of FIG. 1;

fig. 3 is an enlarged view of a portion B of fig. 1.

Detailed Description

The invention is described in further detail below with reference to the following figures and embodiments:

referring to fig. 1 to 3, the utility model provides an automatic blowdown filter ball valve, which comprises a valve body 1, a water inlet connector 2 arranged at the left end of the valve body 1 and a spherical opening and closing piece 3 arranged in the valve body 1, wherein a valve rod 4 is arranged at the upper end of the spherical opening and closing piece 3, the upper end of the valve rod 4 upwards penetrates out of the valve body 1 and is provided with a handle 5, a water outlet connector 6 communicated with the right side of the valve body 1 is arranged at the right side of the valve body 1, and a water service pipe 7 is arranged between the right end of the valve body 1 and the water outlet connector 6; the lower surface of the water pipe 7 is provided with a mounting hole 8 communicated with the inner space of the water pipe; a filter joint 9 matched with the mounting hole 8 is arranged in the mounting hole; the upper end of the filter joint 9 upwards penetrates into the water pipe 7, and a sealing partition plate 10 is arranged on the right side of the upper end face of the filter joint 9; the sealing clapboard 10 and the filtering joint 9 divide the inner space of the water pipe 7 into a left chamber 11 communicated with the water inlet joint 2 and a right chamber 12 communicated with the water outlet joint 6; the inner space of the filtering joint 9 is communicated with the left chamber 11 through the upper end port of the filtering joint; the lower end of the filter joint 9 penetrates out of the mounting hole 8 downwards; a sealing cover 13 matched with the filtering joint 9 is screwed in the lower end port of the filtering joint; the inner wall of the sealing cover 13 is provided with an annular limiting step 14; an annular limiting part 15 extends inwards from the edge of the port at the upper end of the filtering joint 9; a filter screen cylinder 16 is arranged between the limiting part 15 and the limiting step 14, and a plurality of filter holes 17 which are uniformly distributed are arranged on the filter screen cylinder 16; the right side of the part of the filtering joint 9 positioned in the water pipe 7 is provided with a water through hole 18 communicated with the inner space of the filtering joint, and the outer wall of the filtering net barrel 16 covers the water through hole 18; the inner wall of the upper side of the water pipe 7 is provided with an automatic cleaning structure matched with the filter screen cylinder 16.

The automatic cleaning structure comprises a screw hole 19 arranged on the inner wall of the upper side of the water through pipe 7; the outer wall of the upper side of the water service pipe 7 is provided with a sealing hole 20 communicated with the screw hole 19; the lower part of the screw hole 19 is screwed with a guide rod 21 positioned in the water pipe 7; the inner wall of the lower side of the sealing cover 13 is provided with a positioning hole 22 which is coaxial with the guide rod 21; a sliding seat 23 which is coaxial with the guide rod 21 is arranged at the center in the filter screen cylinder 16; an upper groove 24 is formed in the center of the upper end face of the sliding seat 23; a lower groove 25 is formed in the center of the lower end face of the sliding seat 23; the upper groove 24 and the lower groove 25 are communicated through a sliding hole 26; the diameter of the upper groove 24 and the diameter of the lower groove 25 are both larger than the diameter of the sliding hole 26; the lower end of the guide rod 21 downwards sequentially penetrates through the upper groove 24, the sliding hole 26 and the lower groove 25 and penetrates into the positioning hole 22, and the lower end face of the guide rod 21 is attached to the bottom of the positioning hole 22; a cleaning sleeve 27 coaxial with the sliding seat 23 is sleeved outside the sliding seat; the inner wall of the cleaning sleeve 27 is connected with the outer wall of the sliding seat 23 through a plurality of supporting rods 28 which are uniformly distributed on the circumference; a plurality of cleaning plates 29 which are longitudinally and uniformly distributed are arranged on the outer wall of the cleaning sleeve 27, and the outer edges of the cleaning plates 29 are attached to the inner wall of the filter screen drum 16; an upper spring 30 sleeved outside the guide rod 21 is arranged between the inner wall of the upper side of the water through pipe 7 and the bottom of the upper groove 24; a lower spring 31 sleeved outside the guide rod 21 is arranged between the bottom of the lower groove 25 and the inner wall of the lower side of the sealing cover 13; the outer wall of the cleaning sleeve 27 is provided with a plurality of water conveying holes 32 which are positioned between adjacent cleaning plates 29, and the water conveying holes 32 are communicated with the inner space of the cleaning sleeve 27.

The upper end opening of the screw hole 19 is in threaded connection with a screw joint 33 matched with the screw hole; the upper end of the screw joint 33 is provided with a sealing head 34 which is attached to the bottom of the sealing hole 20; the center of the upper surface of the sealing head 34 is provided with an inner hexagonal hole 35; the lower surface of the sealing head 34 is provided with an annular first sealing groove 36, and the first sealing groove 36 encloses the screw joint 33; a first sealing ring 37 matched with the first sealing groove 36 is arranged in the first sealing groove.

At least two water delivery holes 32 are uniformly distributed on the outer wall of the cleaning sleeve 27 in a circumferential manner, the water delivery holes 32 are arc-shaped, and the central angle of the water delivery holes 32 is 90 degrees.

The thickness of the cleaning plate 29 gradually decreases from the outside to the inside.

The water pipe 7 is made of stainless steel; the lower surface of the water service pipe 7 is provided with an annular mounting step 38, the mounting step 38 is coaxial with the mounting hole 8, and the mounting hole 8 is enclosed by the mounting step 38; the outer wall of the lower end of the filtering joint 9 is provided with a welding step 39 which is attached to the mounting step 38; the mounting step 38 and the welding step 39 are fixed by welding.

The outer wall of the sealing cover 13 is provided with a sealing part 40 which is attached to the lower end face of the filtering joint 9; the outer wall of the part, where the sealing cover 13 is screwed with the port at the lower end of the filter joint 9, is provided with a second annular sealing groove 41, and the wall of the lower side of the second sealing groove 41 is the upper surface of the sealing part 40; a second sealing ring 42 matched with the second sealing groove 41 is arranged in the second sealing groove.

An annular clamping part 43 extends downwards from the inner edge of the limiting part 15; the outer wall of the clamping part 43, the lower surface of the limiting part 15 and the inner wall of the filter screen cylinder 16 are enclosed to form an annular caulking groove 44; the lower surface of the clamping part 43 is provided with a rubber pad 45 attached to the lower surface of the clamping part, the rubber pad 45 is annular, and the rubber pad 45 is coaxial with the limiting part 15; an embedding part 46 matched with the embedding groove 44 extends upwards from the outer edge of the upper surface of the rubber pad 45.

The utility model discloses a use method as follows:

when the filter ball valve needs to be used, the handle 5 can be rotated, at the moment, the handle 5 can drive the spherical opening and closing piece 3 to be rotated and opened through the valve rod 4, the water inlet connector 2 is communicated with the left chamber 11 through the spherical opening and closing piece 3, water in a pipeline connected with the water inlet connector 2 can sequentially pass through the water inlet connector 2, the spherical opening and closing piece 3, the left chamber 11, an inner hole of the limiting portion 15 of the filtering connector 9 and an upper end port of the filtering screen cylinder 16 and flow into the filtering screen cylinder 16, then the water flows into the water through hole 18 through the filtering hole 17 on the filtering screen cylinder 16 and then flows into the right chamber 12 through the water through hole 18, and finally the water flows out of the water outlet connector 6 for use, when the water flows to the water through the filtering hole 17, the filtering hole 17 can enable large impurities in the water to flow to be in the filtering screen cylinder 16 through the small pore diameter of the filtering hole 17, the effect of intercepting the water flow is achieved, and the water flow flowing out from the water outlet connector 6 is ensured to be clean water flow.

The water service pipe 7 is made of stainless steel, the lower surface of the water service pipe 7 is provided with an annular installation step 38, the installation step 38 is coaxial with the installation hole 8, the installation step 38 encloses the installation hole 8, the outer wall of the lower end of the filter joint 9 is provided with a welding step 39 attached to the installation step 38, the installation step 38 and the welding step 39 are fixed through welding, the stainless steel has small welding requirements, and therefore welding operation is easy to carry out, the filter joint 9 can be processed independently firstly, after the filter joint 9 is processed, the filter joint can be inserted into the water service pipe 7 through the installation hole 8, and finally, the valve body 1 and the filter joint 9 can be fixed through a welding mode.

When the water flow in the left chamber 11 flows into the filter screen cylinder 16 through the inner hole of the limiting portion 15, the flow trajectory of the water flow is from top to bottom, the water flow directly impacts downward on the upper end surface of the slide seat 23, the upper surface of the support rod 28, the upper end surface of the cleaning sleeve 27 and the upper surface of the uppermost cleaning plate 29, at this time, under the action of downward water pressure, the slide seat 23 moves downward along the trajectory of the guide rod 21, the lower spring 31 is continuously compressed and generates elasticity, when the slide seat 23 moves downward, the cleaning sleeve 27 drives a plurality of longitudinally and uniformly distributed cleaning plates 29 to synchronously move downward, the outer edge of the cleaning plate 29 is attached to the inner wall of the filter screen cylinder 16, when the cleaning plate 29 moves downward, the cleaning plate 29 scrapes off impurities adhered to the inner wall of the filter screen cylinder 16 through the outer edge of the cleaning plate 29, thereby realizing the effect of cleaning impurities, when the filter ball valve 3 closes the filter ball valve, the water flow does not flush into the left chamber 11, the pressure applied to the upper spring 23 suddenly drops, the lower spring 31 instantly cleans the impurities adhered to the inner wall of the filter screen cylinder 16, so that the upper spring 29 moves upward and the upper spring 23 repeatedly moves upward, the upper spring 23, so that the upper spring 23 moves back and the lower spring 30 moves back again, so that the impurities on the cleaning plate 23 can be cleaned by the upper spring 23, the upper spring 23 can be repeatedly compressed and the lower spring 31, and the upper spring can be recovered.

In conclusion, the utility model discloses can process filter joint 9 alone when processing valve body 1, treat that filter joint 9 processes the completion back, fix it and valve body 1 again, the processing degree of difficulty of filter joint 9 has effectively been reduced to this kind of processing mode, do benefit to filter joint 9's processing, and the filter joint 9 of perpendicular installation fixing can guarantee the water flow area of limbers 18 in the at utmost, realize large-traffic water flowing, and when filter screen cylinder 16 utilized self to filter the impurity in the rivers at self filtration hole 17, can utilize the pressure of rivers automatically to make cleaning plate 29 clear up the impurity of adhesion on filter screen cylinder 16 inner wall, effectively avoid impurity constantly to pile up and lead to filtering the circumstances that the inner port mouth of hole 17 influences the normal flow of blockked up rivers on filter screen cylinder 16 inner wall, meanwhile, go up spring 30 and lower spring 31 and can utilize self elasticity to realize the repeated washing of cleaning plate 29 to filter screen cylinder 16 inner wall, avoid filter screen cylinder 17 port mouth of hole 17 to be blockked up in the at utmost.

The thickness of the cleaning plate 29 gradually decreases from outside to inside, and at the moment, the outer edge of the cleaning plate 29 is extremely sharp, so that impurities adhered to the inner wall of the filter screen cylinder 16 are more easily scraped off.

The upper end opening of the screw hole 19 is in threaded connection with a screw joint 33 matched with the screw hole, the upper end of the screw joint 33 is provided with a sealing head 34 attached to the hole bottom of the sealing hole 20, and the center of the upper surface of the sealing head 34 is provided with a hexagon socket 35; the lower surface of the sealing head 34 is provided with a first annular sealing groove 36, the first sealing groove 36 encloses the screw joint 33, a first sealing ring 37 matched with the first sealing groove 36 is arranged in the first sealing groove 36, the screw hole can be conveniently machined due to the existence of the sealing hole 20, the sealing performance of the upper end orifice of the screw hole 19 can be effectively guaranteed due to the existence of the sealing head 34, and the sealing performance of the upper end orifice of the screw hole 19 can be further improved due to the existence of the first sealing ring 37.

At least two water delivery holes 32 are circumference evenly distributed on the outer wall of the cleaning sleeve 27, the water delivery holes 32 are arc-shaped, when water flows into the filter screen cylinder 16 from the left chamber 11, the water flows can flow into the gap between the adjacent cleaning plates 29 through the water delivery holes 32, then flows into the water through holes 18 from the filter holes on the filter screen cylinder 16, and when the central angle of the water delivery holes 32 is 90 degrees, the water delivery area of the water delivery holes 32 can be ensured to the maximum extent, thereby ensuring the large flow when the water is delivered.

The outer wall of sealed lid 13 is equipped with one and the filter joint 9 sealing 40 that the terminal surface was laminated mutually down, sealed lid 13 is equipped with the filter joint 9 position outer wall that lower extreme port looks spiro union is annular second seal groove 41, the side cell wall is the sealing 40 upper surface under the second seal groove 41, be equipped with in the second seal groove 41 rather than assorted second sealing washer 42, the leakproofness when sealed lid 13 and the filter joint 9 lower extreme port spiro union of filter joint can effectively be guaranteed in the existence of sealing 40 and second sealing washer 42, avoid rivers from the filter joint 9 lower extreme port seepage to external condition, play leak protection water effect.

An annular clamping part 43 extends downwards from the inner edge of the limiting part 15, an annular caulking groove 44 is formed by enclosing the outer wall of the clamping part 43, the lower surface of the limiting part 15 and the inner wall of the filter screen cylinder 16, a rubber pad 45 attached to the lower surface of the clamping part 43 is arranged on the lower surface of the clamping part 43, the rubber pad 45 is annular, and the rubber pad 45 is coaxial with the limiting part 15; rubber pad 45 upper surface outside along upwards extending one with caulking groove 44 assorted embedding part 46, the existence of rubber pad 45 can effectively avoid the direct condition that leads to self damage of striking in spacing portion 15 of cleaning plate 29 upper surface of the top, plays buffering effect and abrasionproof and decreases the effect.

Claims (8)

1. The utility model provides an automatic blowdown filter ball valve, includes the valve body, locates the water supply connector of valve body left end and locates the ball-type opening and closing piece in the valve body, and ball-type opening and closing piece upper end is equipped with the valve rod, and the valve rod upper end upwards is worn out to the valve body outside and is equipped with the handle, and the valve body right side is equipped with rather than the water connectors who link up mutually, its characterized in that: a water pipe is arranged between the right end of the valve body and the water outlet joint; the lower surface of the water pipe is provided with a mounting hole communicated with the inner space of the water pipe; a filter joint matched with the mounting hole is arranged in the mounting hole; the upper end of the filtering joint penetrates into the water pipe upwards, and a sealing partition plate is arranged on the right side of the upper end face of the filtering joint; the sealing partition plate and the filtering joint divide the inner space of the water through pipe into a left chamber communicated with the water inlet joint and a right chamber communicated with the water outlet joint; the inner space of the filtering joint is communicated with the left cavity through the upper end port of the filtering joint; the lower end of the filtering joint penetrates out of the mounting hole downwards; a sealing cover matched with the filtering joint is screwed in the port at the lower end of the filtering joint; the inner wall of the sealing cover is provided with an annular limiting step; an annular limiting part extends inwards from the edge of the port at the upper end of the filtering joint; a filter screen cylinder is arranged between the limiting part and the limiting step, and a plurality of filter holes which are uniformly distributed are arranged on the filter screen cylinder; the right side of the part of the filtering joint in the water through pipe is provided with a water through hole communicated with the inner space of the filtering joint, and the outer wall of the filtering net barrel covers the water through hole; the inner wall of the upper side of the water service pipe is provided with an automatic cleaning structure matched with the filter screen cylinder.

2. An automatic blowdown filter ball valve as claimed in claim 1, wherein: the automatic cleaning structure comprises a screw hole arranged on the inner wall of the upper side of the water through pipe; the outer wall of the upper side of the water service pipe is provided with a sealing hole communicated with the screw hole; the lower part of the screw hole is in threaded connection with a guide rod positioned in the water pipe; the inner wall of the lower side of the sealing cover is provided with a positioning hole which is coaxial with the guide rod; a sliding seat coaxial with the guide rod is arranged at the center in the filter screen cylinder; an upper groove is formed in the center of the upper end face of the sliding seat; a lower groove is formed in the center of the lower end face of the sliding seat; the upper groove and the lower groove are communicated through a sliding hole; the diameters of the upper groove and the lower groove are larger than the diameter of the sliding hole; the lower end of the guide rod sequentially penetrates through the upper groove, the sliding hole and the lower groove downwards and penetrates into the positioning hole, and the lower end face of the guide rod is attached to the bottom of the positioning hole; the sliding seat is externally sleeved with a cleaning sleeve coaxial with the sliding seat; the inner wall of the cleaning sleeve is connected with the outer wall of the sliding seat through a plurality of supporting rods which are uniformly distributed on the circumference; the outer wall of the cleaning sleeve is provided with a plurality of cleaning plates which are uniformly distributed in the longitudinal direction, and the outer edges of the cleaning plates are attached to the inner wall of the filter screen cylinder; an upper spring sleeved outside the guide rod is arranged between the inner wall of the upper side of the water pipe and the bottom of the upper groove; a lower spring sleeved outside the guide rod is arranged between the bottom of the lower groove and the inner wall of the lower side of the sealing cover; the outer wall of the cleaning sleeve is provided with a plurality of water conveying holes positioned between adjacent cleaning plates, and the water conveying holes are communicated with the space inside the cleaning sleeve.

3. An automatic blowdown filter ball valve as claimed in claim 2, wherein: the upper end opening of the screw hole is in threaded connection with a screw joint matched with the screw hole; the upper end of the screw joint is provided with a sealing head which is attached to the bottom of the sealing hole; an inner hexagonal hole is formed in the center of the upper surface of the sealing head; the lower surface of the sealing head is provided with an annular first sealing groove which encloses the screw joint; and a first sealing ring matched with the first sealing groove is arranged in the first sealing groove.

4. An automatic blowdown filter ball valve as claimed in claim 2, wherein: at least two water conveying holes are uniformly distributed on the outer wall of the cleaning sleeve in a circumferential manner, the water conveying holes are arc-shaped, and the central angle of the water conveying holes is 90 degrees.

5. An automatic blowdown filter ball valve as claimed in claim 2, wherein: the thickness of the cleaning plate is gradually reduced from outside to inside.

6. An automatic blowdown filter ball valve as claimed in claim 1, wherein: the water pipe is made of stainless steel; the lower surface of the water service pipe is provided with an annular mounting step which is coaxial with the mounting hole and encloses the mounting hole; the outer wall of the lower end of the filtering joint is provided with a welding step which is attached to the mounting step; the installation step and the welding step are fixed through welding.

7. An automatic blowdown filter ball valve as claimed in claim 1, wherein: the outer wall of the sealing cover is provided with a sealing part which is attached to the lower end face of the filtering joint; the outer wall of the part where the sealing cover is in threaded connection with the port at the lower end of the filtering joint is provided with a second annular sealing groove, and the groove wall at the lower side of the second sealing groove is the upper surface of the sealing part; and a second sealing ring matched with the second sealing groove is arranged in the second sealing groove.

8. An automatic blowdown filter ball valve as claimed in claim 1, wherein: an annular clamping part extends downwards from the inner edge of the limiting part; the outer wall of the clamping part, the lower surface of the limiting part and the inner wall of the filter screen cylinder are enclosed to form an annular caulking groove; the lower surface of the clamping part is provided with a rubber pad attached to the clamping part, the rubber pad is annular, and the rubber pad is coaxial with the limiting part; an embedding part matched with the embedding groove extends upwards from the outer edge of the upper surface of the rubber pad.

Images