An angle valve

Abstract

The present invention relates to an angle valve, characterized in that a connecting pipe and a locking cap are provided between the pneumatic head and the installation pipe, one end of the connecting pipe is fixedly connected to the pneumatic head, and the other end is fixedly connected to the locking cap; the piston rod includes a first piston rod and a second piston rod, and one end of the first piston rod is fixed to the pneumatic head, and the other end is detachably fixedly connected to the second piston rod. The beneficial effect of the present invention is that a connecting pipe and a locking cap are provided between the pneumatic head and the installation pipe. When the pneumatic head fails, the connecting pipe and the locking cap can be quickly disassembled to replace the pneumatic head, without having to replace the entire angle valve. And the piston rod is set as a split structure, so that when the piston rod or the valve plate is damaged, the locking cap or the second piston rod or the valve plate can be correspondingly removed to quickly replace the damaged parts, thereby further improving the service life of the angle valve and reducing the use cost.

Description

Technical Field

[0001] The invention relates to a valve for controlling the on-off of a medium, and more particularly to an angle valve, which is mainly used in the field of valves. Background Art

[0002] Angle valve is a kind of angle valve, which is widely used in mechanical equipment such as food, medicine, industry, washing, petrochemical, metallurgy, spraying, etc. The existing angle valve mainly consists of two parts: a pneumatic head and a valve body. The pneumatic head is connected to the valve body. The piston rod in the pneumatic head is placed in the valve body and fixed to the valve plate. During use, the pneumatic head can be driven to realize the normal opening, normal closing or opening and closing of the angle valve, so as to realize the on-off control of the medium in the pipeline.

[0003] Since the piston rod and valve plate of the existing bevel valve are fixedly connected, when the pneumatic head or the valve plate in the valve body is worn and causes the bevel valve to leak, it cannot be replaced, resulting in the scrapping of the entire bevel valve, thereby correspondingly increasing the use cost of the bevel valve. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an angle valve, which is not only easy to open and close to ensure the sealing performance of the valve, but also can quickly replace the valve plate to reduce the use cost of the angle valve.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is an angle valve, including a pneumatic head and a valve body, the pneumatic head is fixed to the valve body and one end of the piston rod in the pneumatic head is placed in the valve body and connected to the valve plate; it is characterized in that the valve body includes a medium circulation tube and a mounting tube, one end of the mounting tube is fixed to the medium circulation tube and is inclined, a medium circulation hole is provided in the medium circulation tube, and the medium circulation hole is coaxially arranged with the mounting tube; a connecting tube and a locking cap are provided between the pneumatic head and the mounting tube, one end of the connecting tube is fixedly connected to the pneumatic head, and the other end is fixedly connected to the locking cap; the piston rod includes a first piston rod and a second piston rod, one end of the first piston rod is respectively placed in the connecting tube and the locking cap and one end of the first piston rod is fixed to the pneumatic head, and the other end is detachably fixedly connected to the second piston rod, and the other end of the second piston rod passes through the locking cap and is fixedly connected to the valve plate that can block the medium circulation hole.

[0006] Furthermore, one end of the first piston rod is fixedly connected to the driving mechanism of the pneumatic head, and the other end is provided with a countersunk hole matching the outer diameter of the second piston rod, and ball holes communicating with the countersunk hole are provided on the surrounding side walls of the countersunk hole; one end of the second piston rod is inserted into the countersunk hole and an annular ball groove is provided on the surrounding side wall of the second piston rod, and the second piston rod is mechanically fixedly connected to the first piston rod through a plurality of balls placed in the ball holes; a locking mechanism for blocking the ball hole is provided on the outer side of the end of the first piston rod, and the locking mechanism is detachably fixed to the outside of the first piston rod.

[0007] Furthermore, the locking mechanism includes a rod sleeve and a locking spring, a first annular step, a second annular step and an annular groove are provided at the end of the first piston rod, an annular boss is provided on the inner side wall of the rod sleeve and the rod sleeve is sleeved outside the first piston rod with one end thereof being placed outside the second annular step, one end of the locking spring is pressed against the second annular step, and the other end is placed on the upper end surface of the annular boss of the rod sleeve, the annular groove is placed below the ball bearing hole and a retaining ring is provided in the annular groove, the annular boss can block the ball bearing hole under the elastic force of the locking spring and the lower end surface of the annular boss is pressed against the retaining ring so that the rod sleeve can be removably fixed outside the first piston rod.

[0008] Furthermore, a mounting hole is provided at the bottom of the pneumatic head, a fixed rod sleeve with an external thread is provided in the mounting hole and the fixed rod sleeve is sleeved outside the first piston rod, the connecting pipe is sleeved outside the first piston rod and an internal thread is provided on the inner side wall of the end portion and is threadedly connected to the fixed rod sleeve; a first sealing filler is provided below the fixed rod sleeve; and a first sealing ring is provided at the connection between the connecting pipe and the pneumatic head.

[0009] Furthermore, a connecting thread is provided on the inner side wall of the mounting tube and a third annular step is provided below the connecting thread; a fourth annular step is provided inside the locking cap and threads fixedly connected to the connecting tube and the mounting tube are provided at both ends of the locking cap; a stuffing rack is provided inside the mounting tube, the stuffing rack is sleeved outside the second piston rod and its top end is pressed against the fourth annular step, and its lower end is placed on the third annular step and fixedly connected to the mounting tube through the locking cap.

[0010] Furthermore, the packing frame includes a packing sleeve, a packing cover, a fixing ring, a packing spring and a packing block. The bottom end of the packing sleeve is provided with a rod sleeve hole, and a through hole is provided above the packing sleeve. The diameter of the through hole is larger than the rod sleeve hole, and the rod sleeve hole and the through hole are connected through a tapered hole; one end of the second piston rod passes through the rod sleeve hole, the tapered hole and the through hole to be connected with the first piston rod; the packing block is placed in the through hole, one end of the packing spring is pressed against the packing block, and the other end is pressed against the packing cover; the fixing ring and the packing sleeve are an integral structure, and the outer side of the fixing ring is placed on the third annular step and fixedly connected to the mounting tube through a locking cap; a second sealing ring is provided at the connection between the fixing ring and the third annular step.

[0011] Furthermore, the cross sections of the connecting pipe and the locking cap are both hexagonal.

[0012] Furthermore, a pin hole is provided at the end of the second piston rod, a piston hole is provided on the top end surface of the valve plate, and a pin hole penetrating the piston hole is also provided in the valve plate. The second piston rod is inserted into the piston hole of the valve plate and a pin is inserted into the pin hole and the pin hole of the valve plate to fix the second piston rod to the valve plate.

[0013] Furthermore, an annular groove is provided on the bottom end surface of the valve plate, a clamping column is provided in the center of the annular groove, the outer diameter of the clamping column is smaller than the inner diameter of the medium flow hole and an outwardly extending inverted ring is provided at the top of the clamping column; a third sealing gasket is provided in the annular groove, and a locking gasket is provided above the third sealing gasket, the third sealing gasket and the locking gasket are respectively arranged outside the clamping column and the outer end surface of the locking gasket is in contact with the inverted ring.

[0014] The beneficial effect of the present invention is that a connecting tube and a locking cap are arranged between the pneumatic head and the mounting tube, so that during use, when the pneumatic head fails, the connecting tube and the locking cap can be quickly disassembled to replace the pneumatic head without replacing the entire bevel valve, thereby improving the service life of the bevel valve and reducing the cost of use; and the piston rod is set as a split structure, so that when the piston rod or the valve plate is damaged, the locking cap or the second piston rod or the valve plate can be removed accordingly to quickly replace the damaged parts, thereby further improving the service life of the bevel valve and reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A cross-sectional structural diagram of an angle valve of the present invention

[0016] Figure 2 A three-dimensional structural diagram of the first piston rod in an embodiment of the present invention

[0017] Figure 3 A three-dimensional structural diagram of the second piston rod in an embodiment of the present invention

[0018] Figure 4A three-dimensional structural diagram of the valve body in an embodiment of the present invention

[0019] Figure 5 A three-dimensional structural diagram of a connecting pipe in an embodiment of the present invention

[0020] Figure 6 A three-dimensional structural diagram of a locking cap in an embodiment of the present invention

[0021] Figure 7 A three-dimensional structural diagram of a rod sleeve in an embodiment of the present invention

[0022] Figure 8 A three-dimensional structural diagram of a packing frame in an embodiment of the present invention

[0023] Fig. 9 The front three-dimensional structure diagram of the valve plate in the embodiment of the present invention

[0024] Fig.10 The bottom three-dimensional structure diagram of the valve plate in the embodiment of the present invention DETAILED DESCRIPTION

[0025] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0026] like Figures 1 to 10As shown, the present invention is an angle valve, comprising 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 placed in the valve body 2 and connected to a valve plate 4; the valve body 2 comprises a medium flow pipe 21 and a mounting pipe 22, one end of the mounting pipe 22 is fixed to the medium flow pipe 21 and is inclined, a medium flow hole 23 is provided in the medium flow pipe 21, and the medium flow hole 23 is coaxially arranged with the mounting pipe 22; the pneumatic head 1 and the mounting pipe 22 are connected to each other ... valve body 2 comprises a medium flow pipe 21 and a mounting pipe 22, one end of the mounting pipe 22 is fixed to the medium flow pipe 21 and is inclined, a medium flow hole 23 is provided in the medium flow pipe 21, and the medium flow hole 23 is coaxially arranged with the mounting pipe 22; the valve body 2 comprises a medium flow pipe 21 and a mounting pipe 22, one end of the mounting pipe 22 is fixed to the medium flow pipe 21 and is inclined, and a medium flow hole 23 is provided in the medium flow pipe 21, A connecting tube 5 and a locking cap 6 are provided between the pipe 22, one end of the connecting tube 5 is fixedly connected to the pneumatic head 1, and the other end is fixedly connected to the locking cap 6; the piston rod 3 includes a first piston rod 31 and a second piston rod 32, one end of the first piston rod 31 is respectively placed in the connecting tube 5 and the locking cap 6 and one end of the first piston rod 31 is fixed to the pneumatic head 1, and the other end is detachably fixedly connected to the second piston rod 32, and the other end of the second piston rod 32 passes through the locking cap 6 and is connected to the sealing medium The valve plate 4 of the mass flow hole 23 is fixedly connected; during the use of the angle valve, the pneumatic head 1 is mostly used to realize the pneumatic drive closing or opening of the valve. After a period of use, the pneumatic head 1, the piston rod 3 or the valve plate 4 are easily damaged, which leads to the overall scrapping of the valve, thereby shortening the service life and use cost of the valve; in order to increase the service life of the angle valve and reduce the use cost of the angle valve, a connecting pipe 5 and a locking cap 6 are arranged between the pneumatic head 1 and the mounting tube 22. In this way, during use, when the pneumatic head 1 fails, the connecting pipe 5 and the locking cap 6 can be quickly disassembled to replace the pneumatic head 1 without replacing the entire angle valve, thereby increasing the service life of the angle valve and reducing the use cost; and the piston rod 3 is set to 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 removed accordingly to quickly replace the damaged parts, thereby further increasing the service life of the angle valve and reducing the use cost.

[0027] In this embodiment, in order to facilitate the rapid installation and 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 to the driving mechanism of the pneumatic head 1, and the other end is provided with a countersunk hole 311 matching the outer diameter of the second piston rod 32, and a ball hole 312 communicating with the countersunk hole 311 is provided on the surrounding side walls of the countersunk hole 311; one end of the second piston rod 32 is inserted into the countersunk hole 311 and an annular ball groove 321 is provided on the surrounding side walls of the second piston rod 32, and the second piston rod 32 is mechanically fixedly connected to the first piston rod 31 through a plurality of balls placed in the ball holes 312; A locking mechanism 7 for blocking the ball hole 312 is provided on the outer side of the end of the first piston rod 31, and the locking mechanism 7 is detachably fixed to the outside of the first piston rod 31; by providing a counterbore 311 in the end of the first piston rod 31 and inserting one end of the second piston rod 32 into the counterbore 311, and then using the locking mechanism 7 to fix the second piston rod 32 to the first piston rod 31, not only can the assembly operation be quickly completed during assembly, thereby improving the assembly efficiency; moreover, when it is necessary to replace the valve plate 4, it is only necessary to remove the second piston rod 32 to quickly replace the valve plate 4, thereby ensuring the sealing performance of the angle valve and the rapid replacement and installation of spare parts.

[0028] In this embodiment, in order to facilitate the detachable fixed connection between the second piston rod 32 and the first piston rod 31 and ensure rapid assembly or replacement of parts, the locking mechanism 7 includes a rod sleeve 71 and a locking spring 72. A first annular step 313, a second annular step 314 and an annular groove 315 are provided at the end of the first piston rod 31. An annular boss 711 is provided on the inner side wall of the rod sleeve 71 and the rod sleeve 71 is sleeved outside the first piston rod 31 with one end thereof being placed outside the second annular step 314. One end of the locking spring 72 is pressed against the second annular step 314 and the other end is placed on the upper end surface of the annular boss 711 of the rod sleeve 71. The annular groove 315 is placed below the ball hole 312 and inside the annular groove 315. A snap ring 316 is provided, and the annular boss 711 can block the ball hole 312 under the elastic force of the locking spring 72, and the lower end surface of the annular boss 711 is pressed and matched with the snap ring 316 to make the rod sleeve 71 detachably fixed to the outside of the first piston rod 31; by providing a ball groove 321 on the second piston rod 32, and providing a 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 snapping it into the ball groove 321, the first piston rod 31 and the second piston rod 32 are detachably connected; and the rod sleeve 71 is provided outside the first piston rod 31, and the locking spring 72 and the annular boss 711 cooperate, and the annular boss 711 and the snap ring 316 cooperate to block the ball on the first piston rod 31. The ball hole 312 can effectively prevent the ball from slipping out of the ball hole 312, thereby ensuring the connection firmness of the first piston rod 31 and the second piston rod 32; during the assembly process, one end of the second piston rod 32 is first inserted into the countersunk hole 311 at the end of the second piston rod 32, and then the ball is placed in the ball hole 312 of the first piston rod 31 so that the ball matches the ball groove 321 on the second piston rod 32, thereby achieving a detachable connection between the first piston rod 31 and the second piston rod 32; and in order to ensure the firmness of the connection, one end of the locking spring 72 is pressed against the second annular step 314, and the other end is pressed against the annular boss 711 of the rod sleeve 71, and the retaining ring 316 restricts the annular boss 711, so that the annular boss 711 of the rod sleeve 71 is The shaped boss 711 is always outside the ball hole 312 under the action of the locking spring 72, which can effectively prevent the ball from sliding out of the ball hole 312, thereby ensuring the firmness of the connection between the second piston rod 32 and the first piston rod 31 and improving the safety of the valve during operation; when disassembly is required, the rod sleeve 71 is pushed upward by hand so that the rod sleeve 71 overcomes the elastic force of the locking spring 72 and slides upward along the second annular step 314. When the end of the rod sleeve 71 slides to the first annular step 313 to form a limit, the retaining ring 316 can be removed at this time, so that the rod sleeve 71 can slide out, so that the ball can be quickly taken out, thereby separating the second piston rod 32 from the first piston rod 31 and facilitating the rapid disassembly and replacement of parts;Of course, from the perspective of the desired purpose, the rod sleeve 71 may not adopt the structure of this embodiment. For example, an internal thread may be directly provided in the rod sleeve 71 so that the rod sleeve 71 is threadedly connected to the outer peripheral side wall of the end of the first piston rod 31. This can also achieve the restriction of the ball and ensure the detachable connection firmness of the second piston rod 32 and the first piston rod 31. However, the connection firmness of the embodiment of this embodiment is strong, so the embodiment of this embodiment is the preferred embodiment. ;

[0029] In this embodiment, in order to facilitate the fixation of the pneumatic head 1 and ensure that the pneumatic head 1 can quickly close and open the angle valve, a mounting hole 11 is provided at the bottom of the pneumatic head 1, and a fixed rod sleeve 12 with an external thread is provided in the mounting hole 11 and the fixed rod sleeve 12 is sleeved outside the first piston rod 31, and the connecting pipe 5 is sleeved outside the first piston rod 31 and an internal thread is provided on the inner side wall of the end thereof and is threadedly connected to the fixed rod sleeve 12; a first sealing filler 13 is provided below the fixed rod sleeve 12; a first sealing ring 14 is provided at the connection between the connecting pipe 5 and the pneumatic head 1; by A mounting hole 11 is provided at the bottom of the pneumatic head 1, so that a fixed rod sleeve 12 can be placed in the mounting hole 11. During installation, the connecting pipe 5 can be threadedly connected to the fixed rod sleeve 12 by means of a thread. In order to ensure the airtightness in the pneumatic head 1, a first sealing filler 13 is provided between the fixed rod sleeve 12 and the connecting pipe 5, and a first sealing ring 14 is provided at the connection between the connecting pipe 5 and the pneumatic head 1. When the pneumatic head 1 is in use, the first sealing filler 13 and the first sealing ring 14 can effectively ensure the airtightness of the pneumatic head 1, ensure the rapid opening or closing of the bevel valve, and improve the safety of the use of the bevel valve.

[0030] In the present embodiment, in order to facilitate the connection between the connecting tube 5 and the locking cap 6 and the locking cap 6 and the mounting tube 22 and the sealing performance of the connection between the components, a connecting thread is provided on the inner side wall of the mounting tube 22 and a third annular step 221 is provided below the connecting thread; a fourth annular step 61 is provided in the locking cap 6 and threads fixedly connected to the connecting tube 5 and the mounting tube 22 are provided at both ends of the locking cap 6; a packing frame 8 is provided in the mounting tube 5, the packing frame 8 is sleeved outside the second piston rod 32 and its top end is pressed against the fourth annular step 61, and its lower end is placed on the third annular step 51 and the packing frame 8 is fixedly connected to the mounting tube 22 through the locking cap 6; by providing the thread and the third annular step 221 in the mounting tube 22, the locking cap 6 and the connecting tube 5 can be effectively and conveniently installed or disassembled quickly; and the third annular step 221 and the fourth annular step 61 are provided, so that when the packing frame 8 is installed, the packing frame 8 can be quickly installed and fixed, thereby effectively ensuring the sealing of the angle valve during use and ensuring the safety of use.

[0031] In this embodiment, in order to prevent the angle valve from leaking during use, 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. The bottom end of the packing sleeve 81 is provided with a rod sleeve hole 811, and a through hole 812 is provided above the packing sleeve 81. The diameter of the through hole 812 is larger than the rod sleeve hole 811, and the rod sleeve hole 81 and the through hole 812 are connected 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 to the first piston rod 31; the packing block 85 is placed 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 the packing cover 82; the fixing ring 83 is provided with a packing spring 84, and the packing spring 84 is provided with a packing spring 84. The fixing ring 83 is provided with a packing spring 84, and the packing spring 84 is provided with a packing spring 84. The fixing ring 83 is provided with a packing spring 84, and the packing spring 84 is provided with a packing spring 84. The fixing ring 83 is provided with a packing spring 84, and the fixing ring 83 ... The fixed ring 83 and the stuffing sleeve 81 are an integral structure and the outer side of the fixed ring 81 is placed on the third annular step 221 and fixedly connected to the mounting tube 22 through the locking cap 6; a second sealing ring 222 is provided at the connection between the fixed ring 83 and the third annular step 221; by arranging the stuffing sleeve 81 with the fixed ring 83 in the mounting tube 22, the mounting tube 22 can be relatively closed, so that the stuffing block 85 is installed in the stuffing sleeve 81 to further prevent the medium from leaking from the second piston rod 32, and effectively ensure the sealing performance of the angle valve; and by installing the stuffing spring 84 in the stuffing sleeve 81, the stuffing spring 84 can be used to automatically adjust the stuffing block 85, thereby further ensuring the sealing performance and safety of the angle valve.

[0032] In this embodiment, in order to facilitate the installation and replacement of the piston rod 3, the cross-sections of the connecting tube 5 and the locking cap 6 are both hexagonal; the cross-sections of the connecting tube 5 and the locking cap 6 are set to be hexagonal, so that the connecting tube 5 and the locking cap 6 can be quickly disassembled or installed with the help of tools, which can effectively improve the work efficiency of installing or replacing parts.

[0033] In this embodiment, in order to facilitate the installation, disassembly and replacement 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 on the top surface of the valve plate 4, and a pin hole 42 penetrating the piston hole 41 is also provided in the valve plate 4. The second piston rod 32 is inserted into the piston hole 41 of the valve plate 4 and a pin is inserted into the pin hole 42 and the pin hole 322 of the valve plate 4 to fix the second piston rod 32 to the valve plate 4. By providing the piston hole 41 on the valve plate 4, 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 to the valve plate 4 by the pin. When the valve plate 4 needs to be replaced, the pin can be removed to quickly replace the valve plate 4.

[0034] In this embodiment, in order to ensure the sealing performance of the angle valve when it is closed, an annular groove 43 is provided on the bottom end surface of the valve plate 4, and a clamping column 44 is provided at the center of the annular groove 43. The outer diameter of the clamping column 44 is smaller than the inner diameter of the medium flow hole 23, and an outwardly extending buckle ring 45 is provided at the top of the clamping column 44; a third sealing gasket 46 is provided in the annular groove 43, and a locking gasket 47 is provided above the third sealing gasket 46. The third sealing gasket 46 and the locking gasket 47 are respectively sleeved on the outside of the clamping column 44, and the outer end surface of the locking gasket 47 is in contact with the buckle ring 45; through An annular groove 43 is provided on the bottom end surface of the valve plate 4 and a third sealing gasket 46 is installed in the annular groove 43, so that when the valve plate 4 closes the angle valve, the sealing performance of the valve can be guaranteed, thereby improving the safety of the valve. In order to facilitate the fixation of the third sealing gasket 46, a clamping column 44 is provided in the annular groove 43 and a buckle ring 45 is added to the top of the clamping column 44, so that the third sealing gasket 46 can be fixed by utilizing the cooperation of the locking gasket 47 and the buckle ring 45, thereby ensuring the installation firmness of the third sealing gasket 46, thereby further improving the sealing performance and the safety of the valve when in use.

[0035] The above embodiments should not be regarded as limiting the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An angle valve, comprising a pneumatic head (1) and a valve body (2). The pneumatic head (1) is fixed to the valve body (2), and one end of a piston rod (3) inside the pneumatic head (1) is placed inside the valve body (2) and connected to a valve plate (4). It is characterized in that the valve body (2) includes a medium flow pipe (21) and a mounting pipe (22). One end of the mounting pipe (22) is fixed to the medium flow pipe (21) and is inclined. A medium flow hole (23) is provided in the medium flow pipe (21), and the medium flow hole (23) is coaxially arranged with the mounting pipe (22). A connecting pipe (5) and a locking cap (6) are provided between the pneumatic head (1) and the mounting pipe (22). One end of the connecting pipe (5) is fixedly connected to the pneumatic head (1), and the other end is fixedly connected to the locking cap (6). The piston rod (3) includes a first piston rod (31) and a second piston rod (32). One end of the first piston rod (31) is respectively placed inside the connecting pipe (5) and the locking cap (6), and one end of the first piston rod (31) is fixed to the pneumatic head (1), and the other end is detachably fixedly connected to the second piston rod (32). The other end of the second piston rod (32) passes through the locking cap (6) and is fixedly connected to the valve plate (4) capable of blocking the medium flow hole (23). One end of the first piston rod (31) is fixedly connected to the driving mechanism of the pneumatic head (1). A counterbore (311) matching the outer diameter of the second piston rod (32) is provided at the other end. Ball holes (312) communicating with the counterbore (311) are provided on the peripheral side walls of the counterbore (311). One end of the second piston rod (32) is inserted into the counterbore (311), and an annular ball groove (321) is provided on the peripheral side wall of the second piston rod (32). The second piston rod (32) is mechanically fixedly connected to the first piston rod (31) by a plurality of balls placed in the ball holes (312). A locking mechanism (7) for blocking the ball holes (312) is provided outside the end of the first piston rod (31), and the locking mechanism (7) is detachably fixed outside the first piston rod (31). Connecting threads are provided on the inner side wall of the mounting pipe (22), and a third annular step (221) is provided below the connecting threads. A fourth annular step (61) is provided inside the locking cap (6), and threads for fixedly connecting to the connecting pipe (5) and the mounting pipe (22) are respectively provided at both ends of the locking cap (6). A packing holder (8) is provided inside the mounting pipe (22). The packing holder (8) is sleeved outside the second piston rod (32), and its top is pressed against and fitted with the fourth annular step (61). Its lower end is placed on the third annular step (221), and the packing holder (8) is fixedly connected to the mounting pipe (22) through the locking cap (6). The described packing rack (8) includes a packing sleeve (81), a packing cover (82), a fixing ring (83), a packing spring (84), and a packing block (85). The bottom end of the packing sleeve (81) is provided with a rod sleeve hole (811), and 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 (811) 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) and is connected to the first piston rod (31). The packing block (85) is placed in the through hole (812). One end of the packing spring (84) abuts against the packing block (85), and the other end is in abutting fit 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 (83) is placed on the third annular step (221) and is fixedly connected to the mounting pipe (22) through a locking cap (6). A second sealing ring (222) is provided at the connection between the fixing ring (83) and the third annular step (221).

2. The angle valve according to claim 1, characterized in that the locking mechanism (7) includes a rod sleeve (71) and a locking spring (72). At the end of the first piston rod (31), there are a first annular step (313), a second annular step (314), and an annular card slot (315). On the inner side wall of the rod sleeve (71), there is an annular boss (711), and the rod sleeve (71) is sleeved outside the first piston rod (31) with one end outside the second annular step (314). One end of the locking spring (72) abuts against the second annular step (314), and the other end is placed on the upper end surface of the annular boss (711) of the rod sleeve (71). The annular card slot (315) is placed below the ball hole (312), and a snap ring (316) is provided in the annular card slot (315). The annular boss (711) can block the ball hole (312) under the elastic force of the locking spring (72), and the lower end surface of the annular boss (711) is in abutting fit with the snap ring (316) so that the rod sleeve (71) is detachably fixed outside the first piston rod (31).

3. The angle valve according to claim 1, characterized in that at the bottom of the pneumatic head (1), there is a mounting hole (11). Inside the mounting hole (11), there is a fixing rod sleeve (12) with an external thread, and the fixing 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 its end is provided with an internal thread and is threadedly connected to the fixing rod sleeve (12). Below the fixing rod sleeve (12), there is a first sealing packing (13). A first sealing ring (14) is provided at the connection between the connecting pipe (5) and the pneumatic head (1).

4. The angle valve according to claim 1, characterized in that the cross sections of the connecting pipe (5) and the locking cap (6) are both hexagonal.

5. The angle valve according to claim 1, characterized in that A pin hole (322) is provided at the end of the second piston rod (32), a piston hole (41) is provided on the top end surface of the valve plate (4), and a pin hole (42) penetrating the piston hole (41) is also provided in the valve plate (4); the second piston rod (32) is inserted into the piston hole (41) of the valve plate (4), and a pin is inserted into the pin hole (42) and the pin hole (322) of the valve plate (4) to fix the second piston rod (32) to the valve plate (4).

6. The angle valve according to claim 1, Features An annular groove (43) is provided on the bottom end surface of the valve plate (4), and a clamping column (44) is provided at the center of the annular groove (43). The outer diameter of the clamping column (44) is smaller than the inner diameter of the medium flow hole (23), and an outwardly extending buckle ring (45) is provided at the top of the clamping column (44); a third sealing gasket (46) is provided in the annular groove (43), and a locking gasket (47) is provided above the third sealing gasket (46). The third sealing gasket (46) and the locking gasket (47) are respectively arranged outside the clamping column (44), and the outer end surface of the locking gasket (47) is in contact with the buckle ring (45).

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