CN210770319U

CN210770319U - Angle valve

Info

Publication number: CN210770319U
Application number: CN201920859034.4U
Authority: CN
Inventors: 李满然; 谭冬阳
Original assignee: Wenzhou Nuomeng Technology Co ltd
Current assignee: Wenzhou Nuomeng Technology Co ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-06-16
Anticipated expiration: 2029-06-06

Abstract

The utility model relates to an oblique angle valve, which is characterized in that a connecting pipe and a locking cap are arranged between a pneumatic head and an installation pipe, one end of the connecting pipe is fixedly connected with the pneumatic head, and the other end is fixedly connected with the locking cap; the piston rod comprises a first piston rod and a second piston rod, one end of the first piston rod is fixed with the pneumatic head, and the other end of the first piston rod is detachably and fixedly connected with the second piston rod. The beneficial effects of the utility model are that set up connecting pipe and locking cap between pneumatic head and installation pipe, when pneumatic hair trouble, just can be quick dismantle the connecting pipe and lock the cap and change pneumatic head, and need not to change whole bevel valve, and establish the piston rod into components of a whole that can function independently structure, when piston rod or valve plate take place to damage, just so can be corresponding pull down the change that the realization that locking cap or second piston rod or valve plate just can be quick damaged spare part, thereby can further improve the life and the reduction use cost of bevel valve.

Description

Angle valve

Technical Field

The utility model relates to a valve of control medium break-make, more specifically the bevel valve that says so relates to, mainly is applied to the valve field.

Background

The angle valve belongs to one kind of angle valve, and is widely applied to mechanical equipment such as food, medicine, industry, washing, petrifaction, metallurgy, spraying and the like. The existing bevel valve mainly comprises a pneumatic head and a valve body, wherein the pneumatic head is connected with the valve body, a piston rod in the pneumatic head is arranged in the valve body and fixed with a valve plate, and in the using process, the bevel valve can be normally opened and normally closed or opened and closed by driving of the pneumatic head, so that the on-off control of a medium in a pipeline is realized.

Because the piston rod and the valve plate of the existing bevel valve are fixedly connected, the bevel valve cannot be replaced when the valve plate in the pneumatic head or the valve body is abraded to cause leakage of the bevel valve, so that the whole bevel valve is scrapped, and the use cost of the bevel valve is correspondingly improved.

Disclosure of Invention

In order to solve the technical problem, the utility model provides an oblique angle valve, this oblique angle valve not only can be convenient for open with closed, guarantee the sealing performance of valve, simultaneously, the change of realization valve plate that still can be quick reduces the use cost of oblique angle valve.

In order to solve the technical problems, the technical scheme adopted by the utility model is an oblique angle valve, which comprises a pneumatic head and a valve body, wherein the pneumatic head is fixed with the valve body, and one end of a piston rod in the pneumatic head is arranged in the valve body and is connected with a valve plate; the valve body is characterized by comprising a medium circulation pipe and an installation pipe, wherein one end of the installation pipe is fixed with the medium circulation pipe and is in an inclined shape, a medium circulation hole is formed in the medium circulation pipe, and the medium circulation hole and the installation pipe are coaxially arranged; a connecting pipe and a locking cap are arranged between the pneumatic head and the mounting pipe, one end of the connecting pipe is fixedly connected with the pneumatic head, and the other end of the connecting pipe is fixedly connected with the locking cap; the piston rod including first piston rod and second piston rod, first piston rod one end is arranged in connecting pipe and locking cap respectively and first piston rod one end is fixed mutually with pneumatic head, the other end and the detachable fixed connection of second piston rod, the other end of second piston rod pass locking cap and the valve plate fixed connection that can shutoff medium flow hole.

Furthermore, one end of the first piston rod is fixedly connected with a driving mechanism of the pneumatic head, a counter bore matched with the outer diameter of the second piston rod is arranged at the end part of the other end of the first piston rod, and ball holes communicated with the counter bore are arranged on the peripheral side wall of the counter bore; one end of the second piston rod is inserted into the counter bore, an annular ball groove is formed in the peripheral side wall of the second piston rod, and the second piston rod is mechanically and fixedly connected with the first piston rod through a plurality of balls placed in the ball hole; and a locking mechanism for plugging the ball hole is arranged on the outer side of the end part of the first piston rod, and the locking mechanism is detachably fixed outside the first piston rod.

Further, locking mechanism including rod cover and locking spring the tip of first piston rod be equipped with first annular step, second annular step and ring groove the rod cover inside wall on be equipped with annular boss and rod cover and put outside first piston rod its one end and put outside second annular step, locking spring one end supports with second annular step and presses mutually, the up end of the annular boss of rod cover is arranged in to the other end, ring groove arrange the below in ball hole and be equipped with the snap ring in ring groove, ring boss under locking spring's elastic force effect can shutoff ball hole and the lower terminal surface of annular boss offset the press fit with the snap ring and make rod cover detachable fix outside first piston rod.

Furthermore, the bottom of the pneumatic head is provided with a mounting hole, a fixed rod sleeve with external threads is arranged in the mounting hole and sleeved outside the first piston rod, and the connecting pipe is sleeved outside the first piston rod, is provided with internal threads on the inner side wall of the end part of the connecting pipe and is in threaded connection with the fixed rod sleeve; a first sealing filler is arranged below the fixed rod sleeve; and a first sealing ring is arranged at the joint of the connecting pipe and the pneumatic head.

Furthermore, a connecting thread is arranged on the inner side wall of the mounting pipe, and a third annular step is arranged below the connecting thread; a fourth annular step is arranged in the locking cap, and threads fixedly connected with the connecting pipe and the mounting pipe are respectively arranged at two ends of the locking cap; and a packing frame is arranged in the mounting pipe, is sleeved outside the second piston rod, and has the top end abutting against the fourth annular step and the lower end arranged on the third annular step and fixedly connected with the mounting pipe through a locking cap.

Furthermore, the packing frame comprises a packing sleeve, a packing cover, a fixing ring, a packing spring and a packing block, wherein a rod sleeve hole is formed in the bottom end of the packing sleeve, a through hole is formed above the packing sleeve, the diameter of the through hole is larger than that of the rod sleeve hole, and the rod sleeve hole is communicated with the through hole through a conical hole; one end of the second piston rod passes through the rod sleeve hole, the conical hole and the through hole to be connected with the first piston rod; the packing block is arranged in the through hole, one end of the packing spring is pressed against the packing block, and the other end of the packing spring is pressed against and matched with the packing cover; the fixing ring and the packing sleeve are of an integral structure, and the outer side of the fixing ring is arranged on the third annular step and is fixedly connected with the mounting pipe through a locking cap; and a second sealing ring is arranged at the joint of the fixing ring and the third annular step.

Furthermore, the cross sections of the connecting pipe and the locking cap are hexagonal.

The end of the second piston rod is provided with a pin hole, the top end surface of the valve plate is provided with a piston hole, a pin hole penetrating through the piston hole is further formed in the valve plate, and the second piston rod is inserted into the piston hole of the valve plate and is fixedly connected with the valve plate by inserting the pin into the pin hole and the pin hole of the valve plate.

Furthermore, an annular groove is arranged on the bottom end face of the valve plate, a clamping column is arranged in the center of the annular groove, the outer diameter of the clamping column is smaller than the inner diameter of the medium circulation hole, and an inverted snap ring extending outwards is arranged at the top end of the clamping column; the annular groove in be equipped with the third sealed pad, be equipped with the locking pad above the third sealed pad, the third sealed pad and locking pad set up respectively outside the card post and the outer terminal surface of locking pad is laminated with the back-off ring mutually.

The utility model has the advantages that the connecting pipe and the locking cap are arranged between the pneumatic head and the mounting pipe, so that in the using process, when the pneumatic head breaks down, the connecting pipe and the locking cap can be quickly disassembled to replace the pneumatic head without replacing the whole bevel valve, thereby prolonging the service life of the bevel valve and reducing the use cost; the piston rod is designed into a split structure, so that when the piston rod or the valve plate is damaged, the replacement of damaged parts can be quickly realized by correspondingly disassembling the locking cap or the second piston rod or the valve plate, and the service life of the bevel valve can be further prolonged and the use cost can be reduced.

Drawings

FIG. 1 is a sectional view of the bevel valve of the present invention

Fig. 2 is a perspective structure diagram of the first piston rod in the embodiment of the present invention

Fig. 3 is a perspective structural view of the second piston rod in the embodiment of the present invention

FIG. 4 is a perspective view of the valve body in the embodiment of the present invention

FIG. 5 is a perspective view of a connecting pipe according to an embodiment of the present invention

FIG. 6 is a perspective view of the locking cap of the embodiment of the present invention

FIG. 7 is a perspective view of the rod cover according to the embodiment of the present invention

FIG. 8 is a three-dimensional structure diagram of the packing frame in the embodiment of the present invention

FIG. 9 is a front perspective view of the valve plate according to the embodiment of the present invention

FIG. 10 is a perspective view of the bottom of the valve plate according to the embodiment of the present invention

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 to 10, the bevel valve of the present invention comprises a pneumatic head 1 and a valve body 2, wherein the pneumatic head 1 is fixed to the valve body 2, and one end of a piston rod 3 in the pneumatic head 1 is disposed in the valve body 2 and connected to a valve plate 4; the valve body 2 is characterized by comprising a medium circulation pipe 21 and a mounting pipe 22, wherein one end of the mounting pipe 22 is fixed with the medium circulation pipe 21 and is in an inclined shape, a medium flow through hole 23 is arranged in the medium flow through pipe 21, and the medium flow through hole 23 and the mounting pipe 22 are coaxially arranged; a connecting pipe 5 and a locking cap 6 are arranged between the pneumatic head 1 and the mounting pipe 22, one end of the connecting pipe 5 is fixedly connected with the pneumatic head 1, and the other end of the connecting pipe is fixedly connected with the locking cap 6; the piston rod 3 comprises a first piston rod 31 and a second piston rod 32, one end of the first piston rod 31 is respectively arranged in the connecting pipe 5 and the locking cap 6, one end of the first piston rod 31 is fixed with the pneumatic head 1, the other end of the first piston rod 31 is detachably and fixedly connected with the second piston rod 32, and the other end of the second piston rod 32 penetrates through the locking cap 6 and is fixedly connected with the valve plate 4 capable of plugging the medium circulation hole 23; in the use process of the bevel valve, the pneumatic driving of the valve is mostly closed or opened by the pneumatic head 1, and after the bevel valve is used for a period of time, the pneumatic head 1, the piston rod 3 or the valve plate 4 are easy to damage, so that the whole valve is scrapped, and the service life and the use cost of the valve are shortened; in order to prolong the service life of the bevel valve and reduce the use cost of the bevel valve, a connecting pipe 5 and a locking cap 6 are arranged between a pneumatic head 1 and a mounting pipe 22, so that in the use process, when the pneumatic head 1 breaks down, the connecting pipe 5 and the locking cap 6 can be rapidly disassembled to replace the pneumatic head 1 without replacing the whole bevel valve, thereby prolonging the service life of the bevel valve and reducing the use cost; the piston rod 3 is designed to be a split structure, so that when the piston rod 3 or the valve plate 4 is damaged, the locking cap 6 or the second piston rod 32 or the valve plate 4 can be correspondingly detached, and the damaged parts can be quickly replaced, so that the service life of the bevel valve can be further prolonged, and the use cost can be reduced.

In this embodiment, in order to facilitate quick installation, disassembly and replacement of parts of the first piston rod 31 and the second piston rod 32, one end of the first piston rod 31 is fixedly connected with a driving mechanism of the pneumatic head 1, a counter bore 311 matched with the outer diameter of the second piston rod 32 is arranged at the end of the other end of the first piston rod 31, and ball holes 312 communicated with the counter bore 311 are arranged on the peripheral side walls of the counter bore 311; one end of the second piston rod 32 is inserted into the counterbore 311, an annular ball groove 321 is arranged on the peripheral side wall of the second piston rod 32, and the second piston rod 32 is mechanically and fixedly connected with the first piston rod 31 through a plurality of balls arranged in the ball holes 312; a locking mechanism 7 for blocking the ball hole 312 is arranged on the outer side of the end part of the first piston rod 31, and the locking mechanism 7 is detachably fixed outside the first piston rod 31; the end part of the first piston rod 31 is internally provided with the counter bore 311, one end of the second piston rod 32 is inserted into the counter bore 311, and then the locking mechanism 7 is used for fixedly connecting the second piston rod 32 and the first piston rod 31, so that the assembly operation can be quickly realized during assembly, and the assembly benefit is improved; moreover, when the valve plate 4 needs to be replaced, the valve plate 4 can be rapidly replaced only by detaching the second piston rod 32, and the sealing performance of the bevel valve and the quick replacement and installation of parts are guaranteed.

In the present embodiment, in order to facilitate the detachable and fixed connection of the second piston rod 32 and the first piston rod 31, rapid assembly or component replacement is ensured; the locking mechanism 7 comprises a rod sleeve 71 and a locking spring 72, a first annular step 313, a second annular step 314 and an annular clamping groove 315 are arranged at the end part of the first piston rod 31, an annular boss 711 is arranged on the inner side wall of the rod sleeve 71, the rod sleeve 71 is sleeved outside the first piston rod 31, one end of the rod sleeve 71 is arranged outside the second annular step 314, one end of the locking spring 72 is abutted against the second annular step 314, the other end of the locking spring is arranged on the upper end face of the annular boss 711 of the rod sleeve 71, the annular clamping groove 315 is arranged below the ball hole 312, a clamping ring 316 is arranged in the annular clamping groove 315, the annular boss 711 can seal the ball hole 312 under the elastic force action of the locking spring 72, and the lower end face of the annular boss 711 is abutted against the clamping ring 316 in a press-fit manner, so that the rod sleeve 71 can be detachably fixed outside the first; the detachable connection of the first piston rod 31 and the second piston rod 32 is realized by arranging the ball groove 321 on the second piston rod 32, arranging the ball hole 312 on the first piston rod 31, and putting the ball into the ball hole 312 of the first piston rod 31 and clamping the ball into the ball groove 321; the rod sleeve 71 is arranged outside the first piston rod 31, and the ball hole 312 in the first piston rod 31 is sealed through the matching of the locking spring 72 and the annular boss 711 and the matching of the annular boss 711 and the snap ring 316, so that balls are effectively prevented from sliding out of the ball hole 312, and the connection firmness of the first piston rod 31 and the second piston rod 32 is ensured; in the assembling process, one end of the second piston rod 32 is inserted into the counter bore 311 at the end of the second piston rod 32, and then balls are put into the ball holes 312 of the first piston rod 31 to match the balls with the ball grooves 321 on the second piston rod 32, so that the first piston rod 31 and the second piston rod 32 are detachably connected; in order to ensure the connection firmness, one end of the locking spring 72 is in abutting press fit with the second annular step 314, the other end of the locking spring is in abutting press fit with the annular boss 711 of the rod sleeve 71, and the annular boss 711 is limited by the snap ring 316, so that the annular boss 711 of the rod sleeve 71 is always positioned outside the ball hole 312 under the acting force of the locking spring 72, the ball can be effectively prevented from sliding out of the ball hole 312, the connection firmness of the second piston rod 32 and the first piston rod 31 is ensured, and the use safety of the valve in the working process is improved; when the disassembly is needed, the rod sleeve 71 is pushed upwards by hand to overcome the elastic force of the locking spring 72, so that the rod sleeve 71 slides upwards along the second annular step 314, when the end part of the rod sleeve 71 slides to the first annular step 313 to form a limit position, the snap ring 316 can be disassembled, and thus the rod sleeve 71 can slide out, so that the ball can be quickly taken out, and the second piston rod 32 is separated from the first piston rod 31, and the quick disassembly and replacement of parts are convenient; of course, for the purpose to be achieved, the rod sleeve 71 may not adopt the structure of the present embodiment, for example, an internal thread is directly provided in the rod sleeve 71, so that the rod sleeve 71 is screwed with the end outer peripheral side wall of the first piston rod 31, and the ball is also limited, and the detachable connection firmness of the second piston rod 32 and the first piston rod 31 is ensured.

In this embodiment, in order to facilitate the fixing of the pneumatic head 1 and ensure that the pneumatic head 1 can rapidly realize the closing and opening of the bevel valve, the bottom of the pneumatic head 1 is provided with an installation hole 11, a fixed rod sleeve 12 with external threads is arranged in the installation hole 11, the fixed rod sleeve 12 is sleeved outside the first piston rod 31, the connecting pipe 5 is sleeved outside the first piston rod 31, and the inner side wall of the end part of the connecting pipe is provided with internal threads and is in threaded connection with the fixed rod sleeve 12; a first sealing filler 13 is arranged below the fixed rod sleeve 12; a first sealing ring 14 is arranged at the joint of the connecting pipe 5 and the pneumatic head 1; the bottom of the pneumatic head 1 is provided with the mounting hole 11, so that the fixing rod sleeve 12 can be placed in the mounting hole 11, the connecting pipe 5 can be in threaded connection with the fixing rod sleeve 12 through threads during mounting, in order to guarantee air tightness in the pneumatic head 1, the first sealing filler 13 is additionally arranged between the fixing rod sleeve 12 and the connecting pipe 5, and the first sealing ring 14 is additionally arranged at the joint of the connecting pipe 5 and the pneumatic head 1, when the pneumatic head 1 is used, the first sealing filler 13 and the first sealing ring 14 can effectively guarantee air tightness of the pneumatic head 1, rapid opening or closing of the bevel valve is guaranteed, and use safety of the bevel valve is improved.

In the embodiment, in order to facilitate the connection between the connecting pipe 5 and the locking cap 6 and the connection between the locking cap 6 and the mounting pipe 22 and the sealing performance of the connection between the components, a connecting thread is arranged on the inner side wall of the mounting pipe 22, and a third annular step 221 is arranged below the connecting thread; a fourth annular step 61 is arranged in the locking cap 6, and threads fixedly connected with the connecting pipe 5 and the mounting pipe 22 are respectively arranged at two ends of the locking cap 6; a packing frame 8 is arranged in the mounting pipe 5, the packing frame 8 is sleeved outside the second piston rod 32, the top end of the packing frame 8 is abutted against and attached to the fourth annular step 61, the lower end of the packing frame 8 is arranged on the third annular step 51, and the packing frame 8 is fixedly connected with the mounting pipe 22 through a locking cap 6; the locking cap 6 and the connecting pipe 5 can be effectively and conveniently and rapidly installed or detached by arranging the threads and the third annular step 221 in the installation pipe 22; and set up third annular step 221 and fourth annular step 61, just can be quick when the installation is packed the frame 8 like this and realize the installation of packing frame 8 fixed to just can effectually guarantee the leakproofness of bevel valve in the use, guarantee the safety in utilization.

In this embodiment, in order to prevent the oblique angle valve from leaking in the using process, the packing frame 8 includes a packing sleeve 81, a packing cover 82, a fixing ring 83, a packing spring 84 and a packing block 85, a rod sleeve hole 811 is provided at the bottom end of the packing sleeve 81, a through hole 812 is provided above the packing sleeve 81, the diameter of the through hole 812 is larger than that of the rod sleeve hole 811, and the rod sleeve hole 81 is communicated with the through hole 812 through a tapered hole 813; one end of the second piston rod 32 passes through the rod sleeve hole 811, the tapered hole 813 and the through hole 812 to be connected with the first piston rod 31; the packing block 85 is arranged in the through hole 812, one end of the packing spring 84 is pressed against the packing block 85, and the other end is pressed against and matched with the packing cover 82; the fixing ring 83 and the packing sleeve 81 are of an integral structure, and the outer side of the fixing ring 81 is arranged on the third annular step 221 and is fixedly connected with the mounting pipe 22 through the locking cap 6; a second sealing ring 222 is arranged at the joint of the fixing ring 83 and the third annular step 221; the packing sleeve 81 with the fixing ring 83 is arranged in the mounting pipe 22, so that the mounting pipe 22 can be relatively sealed, and the packing block 85 is further arranged in the packing sleeve 81, so that the medium can be further prevented from leaking from the second piston rod 32, and the sealing performance of the bevel valve is effectively ensured; and the packing spring 84 is arranged in the packing sleeve 81, so that the packing block 85 can be automatically adjusted by using the packing spring 84, and the sealing performance and the use safety of the bevel valve are further ensured.

In the embodiment, in order to facilitate the installation and replacement of the piston rod 3, the cross sections of the connecting pipe 5 and the locking cap 6 are hexagonal; the cross sections of the connecting pipe 5 and the locking cap 6 are arranged in a hexagon shape, so that the connecting pipe 5 and the locking cap 6 can be rapidly disassembled or assembled by means of a tool, and the working benefit of assembling or replacing parts can be effectively improved.

In this embodiment, in order to facilitate the mounting, dismounting and replacing of the second piston rod 32, a pin hole 322 is provided at the end of the second piston rod 32, a piston hole 41 is provided at the top end surface of the valve plate 4, a plug hole 42 penetrating the piston hole 41 is further provided in the valve plate 4, the second piston rod 32 is inserted into the piston hole 41 of the valve plate 4, and the plug is inserted into the plug hole 42 and the pin hole 322 of the valve plate 4 to fixedly connect the second piston rod 32 and the valve plate 4; the valve plate 4 is provided with the piston hole 41, so that the second piston rod 32 can be inserted into the valve plate 4 during installation and the second piston rod 32 can be quickly fixed with the valve plate 4 through a plug; when the valve plate 4 needs to be replaced, the plug can be removed, and the valve plate 4 can be replaced quickly.

In this embodiment, in order to ensure the sealing performance of the oblique angle valve when the oblique angle valve is closed, an annular groove 43 is provided on the bottom end surface of the valve plate 4, a clamping column 44 is provided in the center of the annular groove 43, the outer diameter of the clamping column 44 is smaller than the inner diameter of the medium flowing hole 23, and an outwardly extending inverted ring 45 is provided on the top end of the clamping column 44; a third sealing gasket 46 is arranged in the annular groove 43, a locking gasket 47 is arranged above the third sealing gasket 46, the third sealing gasket 46 and the locking gasket 47 are respectively sleeved outside the clamping column 44, and the outer end surface of the locking gasket 47 is attached to the inverted ring 45; the annular groove 43 is formed in the bottom end face of the valve plate 4, and the third sealing gasket 46 is mounted in the annular groove 43, so that when the valve plate 4 closes the oblique angle valve, the sealing performance of the valve can be guaranteed, and the use safety of the valve is improved; in order to fix the third sealing gasket 46, the clamping column 44 is arranged in the annular groove 43, and the inverted buckle ring 45 is additionally arranged at the top end of the clamping column 44, so that the third sealing gasket 46 can be fixed by matching the locking pad 47 with the inverted buckle ring 45, the installation firmness of the third sealing gasket 46 is ensured, and the sealing performance and the use safety of the valve in use are further improved.

The above embodiments should not be considered as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of the present invention.

Claims

1. An oblique angle valve comprises a pneumatic head and a valve body, wherein the pneumatic head is fixed with the valve body, and one end of a piston rod in the pneumatic head is arranged in the valve body and connected with a valve plate; the valve body is characterized by comprising a medium circulation pipe and an installation pipe, wherein one end of the installation pipe is fixed with the medium circulation pipe and is in an inclined shape, a medium circulation hole is formed in the medium circulation pipe, and the medium circulation hole and the installation pipe are coaxially arranged; a connecting pipe and a locking cap are arranged between the pneumatic head and the mounting pipe, one end of the connecting pipe is fixedly connected with the pneumatic head, and the other end of the connecting pipe is fixedly connected with the locking cap; the piston rod including first piston rod and second piston rod, first piston rod one end is arranged in connecting pipe and locking cap respectively and first piston rod one end is fixed mutually with pneumatic head, the other end and the detachable fixed connection of second piston rod, the other end of second piston rod pass locking cap and the valve plate fixed connection that can shutoff medium flow hole.

2. The bevel valve according to claim 1, wherein one end of the first piston rod is fixedly connected with a driving mechanism of the pneumatic head, a counter bore matched with the outer diameter of the second piston rod is arranged at the end part of the other end of the first piston rod, and ball holes communicated with the counter bore are arranged on the peripheral side wall of the counter bore; one end of the second piston rod is inserted into the counter bore, an annular ball groove is formed in the peripheral side wall of the second piston rod, and the second piston rod is mechanically and fixedly connected with the first piston rod through a plurality of balls placed in the ball hole; and a locking mechanism for plugging the ball hole is arranged on the outer side of the end part of the first piston rod, and the locking mechanism is detachably fixed outside the first piston rod.

3. The bevel valve according to claim 2, wherein the locking mechanism comprises a rod sleeve and a locking spring, the end of the first piston rod is provided with a first annular step, a second annular step and an annular clamping groove, the inner side wall of the rod sleeve is provided with an annular boss, the rod sleeve is arranged outside the first piston rod, one end of the rod sleeve is arranged outside the second annular step, one end of the locking spring is abutted against the second annular step, the other end of the locking spring is arranged on the upper end face of the annular boss of the rod sleeve, the annular clamping groove is arranged below the ball hole, a clamping ring is arranged in the annular clamping groove, the annular boss can block the ball hole under the elastic force of the locking spring, and the lower end face of the annular boss is abutted against the clamping ring to be pressed, so that the rod sleeve can be detachably fixed outside the first piston rod.

4. The bevel valve according to claim 3, wherein the bottom of the pneumatic head is provided with a mounting hole, a fixed rod sleeve with external threads is arranged in the mounting hole and sleeved outside the first piston rod, the connecting pipe is sleeved outside the first piston rod, and the inner side wall of the end part of the connecting pipe is provided with internal threads and is in threaded connection with the fixed rod sleeve; a first sealing filler is arranged below the fixed rod sleeve; and a first sealing ring is arranged at the joint of the connecting pipe and the pneumatic head.

5. The bevel valve according to claim 4, wherein the mounting pipe is provided with a connecting thread on an inner side wall thereof and a third annular step is provided below the connecting thread; a fourth annular step is arranged in the locking cap, and threads fixedly connected with the connecting pipe and the mounting pipe are respectively arranged at two ends of the locking cap; and a packing frame is arranged in the mounting pipe, is sleeved outside the second piston rod, and has the top end abutting against the fourth annular step and the lower end arranged on the third annular step and fixedly connected with the mounting pipe through a locking cap.

6. The bevel valve according to claim 5, wherein the filler holder comprises a filler sleeve, a filler cover, a fixing ring, a filler spring and a filler block, a rod sleeve hole is formed in the bottom end of the filler sleeve, a through hole is formed above the filler sleeve, the diameter of the through hole is larger than that of the rod sleeve hole, and the rod sleeve hole is communicated with the through hole through a tapered hole; one end of the second piston rod passes through the rod sleeve hole, the conical hole and the through hole to be connected with the first piston rod; the packing block is arranged in the through hole, one end of the packing spring is pressed against the packing block, and the other end of the packing spring is pressed against and matched with the packing cover; the fixing ring and the packing sleeve are of an integral structure, and the outer side of the fixing ring is arranged on the third annular step and is fixedly connected with the mounting pipe through a locking cap; and a second sealing ring is arranged at the joint of the fixing ring and the third annular step.

7. A miter valve according to claim 6, wherein the cross-sections of the connecting tube and the locking cap are hexagonal.

8. The miter valve of claim 7, wherein a pin hole is formed in an end portion of the second piston rod, a piston hole is formed in a top end surface of the valve plate, a plug hole penetrating the piston hole is further formed in the valve plate, and the second piston rod is inserted into the piston hole of the valve plate and is fixedly connected to the valve plate by inserting the plug into the plug hole and the pin hole of the valve plate.

9. The miter valve according to claim 8, wherein an annular groove is formed in a bottom end surface of the valve plate, a clamping post is provided at a center of the annular groove, an outer diameter of the clamping post is smaller than an inner diameter of the medium flowing hole, and an inverted retaining ring extending outward is provided at a top end of the clamping post; the annular groove in be equipped with the third sealed pad, be equipped with the locking pad above the third sealed pad, the third sealed pad and locking pad set up respectively outside the card post and the outer terminal surface of locking pad is laminated with the back-off ring mutually.