阅读说明：本技术 一种串级式多级降压调节阀 (Cascade type multi-stage pressure reduction regulating valve ) 是由 丁松贤 杨成鑫 张远凯 丁梦楠 李荣明 于 2021-08-28 设计创作，主要内容包括：本发明涉及调节阀技术领域,具体的说是一种串级式多级降压调节阀,包括主阀、副阀和接头,通过使用该副阀,并控制该副阀的开启和关闭,对管道流体进行直接的控制,为后续操控主阀进行降压调节提供便利,减轻主阀调节过程中管道内压力的阻碍,通过设置副阀进行辅助,使该调节阀的降压操作分担到两个独立阀门之上,降低主阀遭受的压力,使主阀更加的耐用,从而进一步提高该调节阀的使用寿命,同时,通过设置副阀进行辅助降压调节,使该调节阀能够降压调节的范围更大,从而进一步提高该调节阀的使用范围,同时,通过副阀进行辅助降压调节,副阀与主阀之间相互配合,能够搭配调节出更加精细的压力范围,从而提高该调节阀使用精度。(The invention relates to the technical field of regulating valves, in particular to a cascade multi-stage pressure reduction regulating valve which comprises a main valve, an auxiliary valve and a joint, wherein the auxiliary valve is used for controlling the opening and closing of the auxiliary valve to directly control pipeline fluid, thereby providing convenience for the subsequent control of the main valve to carry out pressure reduction regulation, relieving the obstruction of pressure in a pipeline in the regulating process of the main valve, the auxiliary valve is arranged for assistance, the pressure reduction operation of the regulating valve is shared between two independent valves, the pressure suffered by the main valve is reduced, the main valve is more durable, the service life of the regulating valve is further prolonged, meanwhile, the auxiliary valve is arranged for auxiliary pressure reduction regulation, the regulating valve can have a larger pressure reduction regulating range, the use range of the regulating valve is further increased, meanwhile, the auxiliary pressure reduction regulation is carried out through the auxiliary valve, and the auxiliary valve is matched with the main valve, can match and adjust out more meticulous pressure range to improve this governing valve use accuracy.)

1. The utility model provides a multistage pressure reduction governing valve of cascade, includes main valve (1), auxiliary valve (6) and connects (7), its characterized in that: the auxiliary valve (6) is installed on one side of the main valve (1), a connector (7) is installed at the bottom of the main valve (1), the main valve (1) comprises a first valve body (2), a stand column frame (3) and a rod frame (4), the stand column frame (3) is fixedly welded to the top of the valve body (2), an executing mechanism (301) is installed at the top of the stand column frame (3), the rod frame (4) is installed at the top of the first valve body (2), the rod frame (4) is located in the stand column frame (3), a first valve rod (5) is in sliding fit with the rod frame (4), the top of the first valve rod (5) is connected with the bottom of the executing mechanism (301), a cascade valve flap (502) is connected to the bottom end of the first valve rod (5), and the cascade valve flap (502) is movably matched inside the first valve body (2);

the auxiliary valve (6) comprises a second valve body (601), a valve frame (605) and a second valve rod (607), the second valve body (601) is connected with the first valve body (2) through a bolt, the interior of the second valve body (601) is communicated with the interior of the first valve body (2), a valve frame (605) is arranged at the top of the second valve body (601), a second valve rod (607) is rotatably matched on the valve frame (605), a valve plate (608) is connected at the bottom end of the second valve rod (607), the valve plate (608) is movably matched in the second valve body (601), wherein, a thread sleeve (606) is fixedly arranged in the valve frame (605), the outer side wall of the upper part of the second valve rod (607) is provided with threads, the second valve rod (607) is in threaded fit with the threaded sleeve (606), a rotary disc (609) is fixed at the top of the second valve rod (607), and the second valve rod (607) is in rotating fit connection with the valve plate (608);

the joint (7) is of a hollow cylinder structure, the size of the top section of the joint (7) is matched with that of the bottom section of the first valve body (2), and the top of the joint (7) is connected with the bottom of the first valve body (2) through a bolt.

2. The cascade multistage pressure reducing regulating valve according to claim 1, characterized in that: first valve body (2) are hollow structure, and the bottom of first valve body (2) and the one side that is close to auxiliary valve (6) all are equipped with the opening, and first valve body (2) are close to the opening part of auxiliary valve (6) and are fixed with second mounting panel (202), and second mounting panel (202) are ring type structure, and first valve body (2) bottom opening part is fixed with first mounting panel (201), and first mounting panel (201) are ring type structure.

3. The cascade multistage pressure reducing regulating valve according to claim 2, characterized in that: second valve body (601) are hollow structure, and the both ends of second valve body (601) all are equipped with the opening, and second valve body (601) both ends opening part all is fixed with third mounting panel (602), and one of them third mounting panel (602) that is close to first valve body (2) is connected with second mounting panel (202) through the bolt, and third mounting panel board (602) directly fill up with second mounting panel (202) and are equipped with sealed plastic pad.

4. The cascade multistage pressure reducing regulating valve according to claim 1, characterized in that: the valve seat (203) and the valve cage (204) are arranged inside the first valve body (2), the valve seat (203) and the valve cage (204) are located right above an opening in the bottom of the first valve body (2), the valve cage (204) is located right above the valve seat (203), the size of the cross section of the valve seat (203) is matched with the size of the cross section of the cascade valve clack (502), and the cascade valve clack (502) is movably matched in the valve seat (203) and the valve cage (204).

5. The cascade multistage pressure reducing regulating valve according to claim 1, characterized in that: the top of first valve body (2) is equipped with the opening, and inside first valve rod (5) penetrated first valve body (2) from first valve body (2) top opening part, be equipped with sealing filler between first valve rod (5) and first valve body (2) top opening.

6. The cascade multi-stage pressure reducing regulating valve according to claim 5, wherein: the bottom of pole frame (4) is connected with gland (401), gland (4) are installed at first valve body (2) top opening part, be equipped with gland cover between gland (4) and first valve body (2) opening, the top of pole frame (4) is connected with lantern ring (402), lantern ring (402) and gland (4) are run through in first valve rod (5), and first valve rod (5) sliding fit is in lantern ring (402), the equal vertical welding of two inside walls of pole frame (4) has slide rail (403).

7. The cascade multi-stage pressure reducing regulating valve according to claim 6, wherein: the sliding block (501) is sleeved on the first valve rod (5), sliding grooves are vertically formed in two ends of the sliding block (501), the two sliding grooves are respectively matched with the two sliding rails (403), and the sliding block (501) is in sliding fit with the two sliding rails (403) through the two sliding grooves.

8. The cascade multistage pressure reducing regulating valve according to claim 1, characterized in that: the middle part of the second valve body (601) is provided with a valve hole (603), the valve hole (603) is formed by two through holes in the middle parts of two steel plates which are arranged in parallel, the distance between the two steel plates which are arranged in parallel is equal to the thickness of the valve plate (608), and the valve plate (608) is movably matched between the two steel plates which are arranged in parallel.

9. The cascade multistage pressure reducing regulating valve according to claim 1, characterized in that: the top of the second valve body (601) is provided with an opening, the opening at the top of the second valve body (601) is covered with a valve cover (604), a rotary hole is formed in the central opening at the top of the valve cover (604), the rotary hole is communicated with the inside of the second valve body (601), a second valve rod (607) is rotatably matched in the rotary hole, and a valve frame (605) is arranged at the opening at the top of the second valve body (601) and at the bottom of the valve frame (605).

10. The cascade multistage pressure reducing regulating valve according to claim 1, characterized in that: the using method of the cascade multistage depressurization regulating valve specifically comprises the following steps:

the method comprises the following steps: fixing a third mounting plate (602) of the regulating valve with a pipeline through a bolt, and connecting the bottom of a regulating valve joint (7) with the other section of the pipeline through the bolt to finish the mounting of the regulating valve;

step two: the second valve rod (607) is rotated by rotating the rotary table (609), the second valve rod (607) moves up and down by rotating in the threaded sleeve (606), the valve plate (608) moves in the valve hole (603) by moving the second valve rod (607) up and down, and the opening and closing of the auxiliary valve (6) are controlled by moving the valve plate (608) in the valve hole (603);

step three: the first valve rod (5) is driven by the actuator (301), the cascade valve flap (502) is driven by the first valve rod (5), the cascade valve flap (502) moves in the valve seat (203) and the valve cage (204), when the cascade valve flap (502) moves to the valve seat (203), the main valve (1) is in a closed state, when the cascade valve flap (502) moves to the valve cage (204), the main valve (1) is in an open state, and the cascade valve flap (502) is controlled to slowly move towards the valve seat (203) by being driven by the actuator (301), so that the pressure reduction adjusting function of the adjusting valve is realized.

Technical Field

The invention relates to the technical field of regulating valves, in particular to a cascade type multi-stage pressure reduction regulating valve.

Background

In thermal power plant's soda system, there is the condition of using the governing valve under some operating modes are abominable, because abominable operating mode, can appear the flash distillation in the governing valve, cavitation erosion and high-speed problem that erodees, consequently, can appear big problems such as governing valve operation terminal time after the regulation performance variation, jam, interior hourglass, to the problem that the governing valve appears easily under abominable operating mode, multistage step-down governing valve has appeared in the market deals with, solve the problem that exists through the mode of multistage step-down.

There is very big defect at present in multistage pressure reduction governing valve use, current multistage pressure reduction governing valve installation is dismantled not simply enough, bring inconvenience for the use, also do not do benefit to and use widely simultaneously, current multistage pressure reduction governing valve can not be simple decompose and assemble, bring inconvenience for carrying the transportation, and simultaneously, can not decompose independent utility, can't assemble according to the practical application demand, the flexibility of using has been reduced, and simultaneously, current multistage pressure reduction governing valve reduces the regulation through a whole, the pressure that the valve suffered can not be shared, thereby shortened the life-span of using, and simultaneously, the pressure range of bearing is limited, the scope of pressure reduction regulation is also limited, consequently, the scope of using has been reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a cascade multistage pressure reduction regulating valve.

The technical scheme adopted by the invention for solving the technical problems is as follows: a cascade multi-stage pressure reduction regulating valve comprises a main valve, an auxiliary valve and a joint, wherein the auxiliary valve is installed on one side of the main valve, the regulating valve is formed by connecting the main valve and the auxiliary valve, so that the regulating valve is convenient to disassemble and combine, the regulating valve occupies less space by simplifying and combining the regulating valve, the storage, carrying and transportation of the regulating valve are facilitated, the combination of the regulating valve is simpler, the assembly and use of users are facilitated, meanwhile, the disassembly and combination of the regulating valve are more convenient, the replacement and maintenance of the regulating valve in the later period are facilitated, the regulating valve is formed by the main valve and the auxiliary valve, the main valve and the auxiliary valve can be independently used like a traditional valve, and when the regulating valve is used, the main valve and the auxiliary valve can be matched in multiple groups or independently installed and used according to actual conditions, and then make this adjusting valve's installation use more nimble, simultaneously, also make this adjusting valve can deal with more different pipeline condition, the joint is installed to the bottom of main valve, can regard as this adjusting valve's extension interface through setting up the joint, make this adjusting valve can not restricted and narrow and small space in the installation, this joint can produce the size of equidimension not, make the pipeline of the different size of adaptation of governing valve compatibility adaptation, compare in the production with the governing valve of pipeline looks adaptation, through the pipeline of the different size of joint adaptation, more simple and convenient and more economical and practical, simultaneously, through setting up the joint, consequently, need not set up the overlength of the pipeline junction of governing valve, namely need not set up the overlength of first valve body bottom, and then conveniently clear up the inside of first valve body, wherein, the main valve includes first valve body, The top of the valve body is fixedly welded with the upright post frame, the top of the upright post frame is provided with an actuating mechanism, the rod frame is arranged at the top of the first valve body, the rod frame is positioned in the upright post frame, a first valve rod is matched in the rod frame in a sliding way, the top of the first valve rod is connected with the bottom of the actuating mechanism, the bottom end of the first valve rod is connected with a cascade valve clack, the cascade valve clack is movably matched in the first valve body, the cascade valve clack is controlled to slowly move towards the valve seat through the driving of the actuating mechanism, the pressure reduction and regulation functions of the regulating valve are realized, the regulating valve can realize the function of regulating the flow of the pipeline by arranging the main valve, realize the multi-stage throttling of the regulating valve by arranging the cascade valve clacks, effectively reduce the flow velocity and reduce the flushing of fluid to the valve core, by using the cascade valve clacks, each stage is uniformly depressurized, and cavitation caused by high pressure difference formed in the last stage is avoided;

the auxiliary valve comprises a second valve body, a valve frame and a second valve rod, the second valve body is connected with the first valve body through a bolt, the interior of the second valve body is communicated with the interior of the first valve body, the valve frame is installed at the top of the second valve body, the second valve rod is matched on the valve frame in a rotating mode, the bottom end of the second valve rod is connected with a valve plate, the valve plate is movably matched inside the second valve body, a threaded sleeve is fixedly installed inside the valve frame, threads are formed in the outer side wall of the upper portion of the second valve rod, the second valve rod is matched with the threaded sleeve in a threaded mode, a rotary disc is fixed at the top of the second valve rod, the second valve rod is connected with the valve plate in a rotating mode in a matching mode, the auxiliary valve is used and controls the opening and closing of the auxiliary valve to directly control pipeline fluid, convenience is brought to the subsequent pressure reduction adjustment of the main valve, and obstruction of the pressure in a pipeline in the adjustment process of the main valve is relieved, the auxiliary valve is arranged for assistance, so that the pressure reduction operation of the regulating valve is shared by two independent valves, the pressure suffered by the main valve is reduced, the main valve is more durable, meanwhile, the auxiliary valve is arranged for assistance pressure reduction adjustment, the range of the regulating valve capable of reducing the pressure is larger, meanwhile, the auxiliary valve is used for assistance pressure reduction adjustment, the auxiliary valve is matched with the main valve, and a finer pressure range can be adjusted in a matched mode;

the joint is of a hollow cylinder structure, the size of the cross section of the top of the joint is matched with that of the cross section of the bottom of the first valve body, and the top of the joint is connected with the bottom of the first valve body through a bolt.

Preferably, first valve body is hollow structure, and the bottom of first valve body and the one side that is close to the auxiliary valve all are equipped with the opening, and the opening part that first valve body is close to the auxiliary valve is fixed with the second mounting panel, and the second mounting panel is ring type structure, and first valve body bottom opening part is fixed with first mounting panel, and first mounting panel is ring type structure, through setting up first mounting panel and second mounting panel, makes things convenient for the installation of first valve body.

Preferably, the second valve body is hollow structure, and the both ends of second valve body all are equipped with the opening, and second valve body both ends opening part all is fixed with the third mounting panel, and one of them third mounting panel that is close to first valve body passes through the bolt to be connected with the second mounting panel, and third mounting panel board and second mounting panel directly connect the pad and are equipped with sealed plastic pad, through setting up sealed plastic pad, strengthen the leakproofness of this governing valve.

Preferably, a valve seat and a valve cage are arranged in the first valve body, the valve seat and the valve cage are both located right above the bottom opening of the first valve body, the valve cage is located right above the valve seat, the size of the cross section of the valve seat is matched with that of the cross section of the cascade valve clack, and the cascade valve clack is movably matched in the valve seat and the valve cage.

Preferably, the top of first valve body is equipped with the opening, and inside first valve body was penetrated from first valve body top opening to first valve rod, was equipped with sealing filler between first valve rod and the first valve body top opening, through setting up sealing filler, made laminating more closely before first valve rod and the first valve body top opening to improve the leakproofness of this governing valve.

Preferably, the bottom of the rod frame is connected with a gland, the gland is installed at the opening at the top of the first valve body, a packing sealing cover is arranged between the gland and the opening of the first valve body, the top of the rod frame is connected with a lantern ring, the first valve rod penetrates through the lantern ring and the gland, the first valve rod is in sliding fit with the lantern ring, and sliding rails are welded on the two inner side walls of the rod frame vertically.

Preferably, the slider has been cup jointed on the first valve rod, and the equal vertical spout of having seted up in both ends of slider, two spouts respectively with even a slide rail adaptation, the slider through two spout sliding fit on two slide rails, through setting up the slider to with slider sliding fit on two slide rails, make more steady that first valve rod reciprocated, and then make more stable smooth and easy that cascade valve clack removed, thereby improve stability and the reliability that this governing valve used.

Preferably, the valve hole has been seted up at the middle part of second valve body, and the valve hole comprises two through-holes at two steel sheet middle parts of parallel arrangement with two valve holes, and distance between two parallel arrangement's the steel sheet equals with the thickness of valve plate, and valve plate clearance fit is in the middle of two parallel arrangement's steel sheet.

Preferably, the top of the second valve body is provided with an opening, the opening at the top of the second valve body is covered with a valve cover, a rotary hole is formed in the central opening at the top of the valve cover, the rotary hole is communicated with the inside of the second valve body, the second valve rod is rotatably matched in the rotary hole, and the valve frame is arranged at the opening at the top of the second valve body and at the bottom of the valve frame.

Preferably, the use method of the cascade multistage pressure reduction regulating valve specifically comprises the following steps:

the method comprises the following steps: fixing the third mounting plate of the regulating valve with a pipeline through a bolt, and connecting the bottom of the joint of the regulating valve with the other section of the pipeline through the bolt to finish the mounting of the regulating valve;

step two: the second valve rod rotates by rotating the rotary table, moves up and down by rotating in the threaded sleeve, moves the valve plate in the valve hole by moving up and down the second valve rod, and controls the opening and closing of the auxiliary valve by moving the valve plate in the valve hole;

step three: the first valve rod is driven by the actuating mechanism, the cascade valve clack is driven by the first valve rod to move in the valve seat and the valve cage, when the cascade valve clack moves to the valve seat, the main valve is in a closed state, when the cascade valve clack moves to the valve cage, the main valve is in an open state, and the cascade valve clack is controlled to slowly move towards the valve seat through the driving of the actuating mechanism, so that the pressure reduction adjusting function of the adjusting valve is realized.

The invention has the beneficial effects that:

(1) the cascade multistage decompression regulating valve of the invention has the advantages that the regulating valve is installed and fixed by using the bolts, so that the installation and the disassembly of the regulating valve are simpler, the installation, the use and the replacement of the regulating valve are further facilitated, the convenience in use of the regulating valve is improved, meanwhile, the difficulty in installation of the regulating valve is reduced by making the regulating valve more convenient to install and use, the popularization of the regulating valve is facilitated, the regulating valve is formed by connecting the main valve and the auxiliary valve, the regulating valve is convenient to disassemble and combine, the space occupation of the regulating valve is smaller by making the disassembly of the regulating valve simple and convenient, the storage, the carrying and the transportation of the regulating valve are further facilitated, the convenience is brought to the carrying and the use of the regulating valve, the combination of the regulating valve is simpler, and the assembly and the use of a user are facilitated, therefore, the efficiency of assembly and use is improved, meanwhile, the disassembly and combination of the regulating valve are more convenient, the later-stage replacement and maintenance of the regulating valve are facilitated, the service life of the regulating valve is prolonged, the regulating valve consists of a main valve and an auxiliary valve, both the main valve and the auxiliary valve can be independently used like a traditional valve, when the regulating valve is used, the main valve and the auxiliary valve can be matched in groups or independently installed and used according to actual conditions, the installation and the use of the regulating valve are more flexible, the use flexibility of the regulating valve is improved, meanwhile, the regulating valve can also be used for more different pipeline conditions, the use range of the regulating valve is improved, a joint can be used as an extension interface of the regulating valve, the regulating valve cannot be limited and narrow and small in space in the installation process, and the application range of the regulating valve is improved, this joint can produce the not size of equidimension, make the not size of the pipeline of governing valve compatible adaptation, compare in the production with the governing valve of pipeline looks adaptation, through the not size of the pipeline of joint adaptation, more simple and convenient and more economical and practical, and simultaneously, connect through setting up, consequently need not with the overlength of governing valve with the pipe connection department setting, need not be the overlength that sets up first valve body bottom promptly, and then conveniently clear up first valve body is inside, thereby bring the facility for the inside cleaning work of this governing valve.

(2) The cascade multi-stage pressure reduction regulating valve provided by the invention directly controls the pipeline fluid by using the auxiliary valve and controlling the opening and closing of the auxiliary valve, provides convenience for the subsequent pressure reduction regulation of the main valve, relieves the obstruction of pressure in the pipeline in the regulating process of the main valve, is assisted by arranging the auxiliary valve, ensures that the pressure reduction operation of the regulating valve is shared by two independent valves, reduces the pressure suffered by the main valve, ensures that the main valve is more durable, further prolongs the service life of the regulating valve, simultaneously ensures that the range of the pressure reduction regulation of the regulating valve is wider by arranging the auxiliary valve for auxiliary pressure reduction regulation, further improves the use range of the regulating valve, simultaneously, performs auxiliary pressure reduction regulation by the auxiliary valve, and can match and regulate a finer pressure range by the auxiliary valve and the main valve, thereby improve this governing valve use accuracy, through setting up the carousel, make this governing valve manual more laborsaving, simultaneously, through set up the screw thread on the second valve rod, make the second valve rod rotate to rise more accurate of regulation, simultaneously, also avoid appearing the condition that second valve rod slip removed, through setting up valve opening and valve plate, when making the auxiliary valve close completely, to the more thorough of pipeline fluid truncation.

(3) According to the cascade multi-stage depressurization regulating valve, the main valve is arranged, so that the regulating valve can realize the function of regulating the flow of a pipeline, the cascade valve clack is arranged, so that the multi-stage throttling of the regulating valve is realized, the flow speed can be effectively reduced, and the flushing of fluid to the valve core is reduced, so that the service life of the regulating valve is further prolonged, each stage is depressurized uniformly by using the cascade valve clack, the cavitation caused by the high pressure difference formed at the last stage is avoided, the first valve rod is moved up and down more stably by arranging the sliding block and sliding and matching the sliding block on the two sliding rails, so that the cascade valve clack is moved more stably and smoothly, and the use stability and reliability of the regulating valve are improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic diagram of the main valve structure of the present invention.

FIG. 3 is a side cross-sectional view of the main valve of the present invention.

FIG. 4 is a front cross-sectional view of the main valve structure of the present invention.

Fig. 5 is a schematic view of the structure of the pole frame of the present invention.

FIG. 6 is a schematic view of a first valve stem configuration of the present invention.

Fig. 7 is a schematic view of the structure of the auxiliary valve of the present invention.

FIG. 8 is a cross-sectional view of the construction of the secondary valve of the present invention.

Fig. 9 is a schematic view of a second valve stem configuration of the present invention.

In the figure: 1. a main valve; 2. a first valve body; 201. a first mounting plate; 202. a second mounting plate; 203. a valve seat; 204. a cage; 3. a column frame; 301. an actuator; 4. a pole frame; 401. a gland; 402. a collar; 403. a slide rail; 5. a first valve stem; 501. a slider; 502. a cascade valve flap; 6. an auxiliary valve; 601. a second valve body; 602. a third mounting plate; 603. a valve bore; 604. a valve cover; 605. a valve frame; 606. a threaded sleeve; 607. a second valve stem; 608. a valve plate; 609. a turntable; 7. and (4) a joint.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 9, a cascade multistage pressure reducing regulating valve according to the present invention comprises a main valve 1, a sub-valve 6 and a joint 7, wherein the sub-valve 6 is installed at one side of the main valve 1, and the regulating valve is formed by connecting the main valve 1 and the sub-valve 6, so that the regulating valve is conveniently disassembled and assembled, the regulating valve occupies less space by simply and conveniently disassembling the regulating valve, thereby facilitating storage, carrying and transportation of the regulating valve, thereby facilitating carrying and use of the regulating valve, facilitating assembly and use of a user by simply assembling the regulating valve, thereby improving efficiency of assembly and use, and facilitating later replacement and maintenance of the regulating valve by more conveniently disassembling and assembling the regulating valve, thereby prolonging the service life of the regulating valve, the regulating valve is formed by the main valve 1 and the sub-valve 6, the main valve 1 and the auxiliary valve 6 can be used independently like a traditional valve, when the regulating valve is used, the main valve 1 and the auxiliary valve 6 can be matched in a plurality of groups or can be installed and used independently according to actual conditions, and the regulating valve is more flexible to install and use, so that the use flexibility of the regulating valve is improved, meanwhile, the regulating valve can be used for dealing with more different pipeline conditions, so that the use range of the regulating valve is improved, the joint 7 is installed at the bottom of the main valve 1, the joint 7 can be used as an extension interface of the regulating valve, so that the regulating valve cannot be limited and narrow in the installation process, the application range of the regulating valve is improved, the joint 7 can be used for producing different sizes, the regulating valve can be compatible with pipelines with different sizes, compared with the regulating valve which is matched with the pipelines, the connector is adapted to pipelines with different sizes, so that the valve is simpler, more convenient, more economical and more practical, and meanwhile, the connector 7 is arranged, so that the overlong arrangement of the joint of the regulating valve and the pipeline is not needed, namely the overlong arrangement of the bottom of the first valve body 2 is not needed, and the inside of the first valve body 2 is conveniently cleaned, thereby bringing convenience to the cleaning work of the inside of the regulating valve, wherein the main valve 1 comprises the first valve body 2, a stand 3 and a rod frame 4, the top of the valve body 2 is fixedly welded with the stand 3, the top of the stand 3 is provided with an actuating mechanism 301 (model: AOX-Q-L200; manufacturer: Macao autonomous technology Limited company in Zhejiang), the rod frame 4 is arranged at the top of the first valve body 2, the rod frame 4 is positioned in the stand 3, the rod frame 4 is in sliding fit with a first valve rod 5, the top of the first valve rod 5 is connected with the bottom of the actuating mechanism 301, the bottom end of the first valve rod 5 is connected with a cascade valve clack 502, the cascade valve clack 502 is movably matched inside the first valve body 2, the cascade valve clack 502 is driven by an actuating mechanism 301 to control the cascade valve clack 502 to slowly move towards a valve seat 203, the pressure reduction adjusting function of the adjusting valve is realized, the adjusting valve can realize the function of adjusting the pipeline flow by arranging a main valve 1, the multistage throttling of the adjusting valve is realized by arranging the cascade valve clack 502, the flow speed can be effectively reduced, the flushing of fluid to a valve core is reduced, the service life of the adjusting valve is further prolonged, the pressure reduction of each stage is uniform by using the cascade valve clack 502, and the cavitation caused by the high pressure difference formed by the last stage is avoided;

the auxiliary valve 6 comprises a second valve body 601, a valve frame 605 and a second valve rod 607, the second valve body 601 is connected with the first valve body 2 through bolts, the inside of the second valve body 601 is communicated with the inside of the first valve body 2, the valve frame 605 is installed at the top of the second valve body 601, the second valve rod 607 is rotatably matched on the valve frame 605, the bottom end of the second valve rod 607 is connected with a valve plate 608, the valve plate 608 is movably matched in the second valve body 601, wherein a threaded sleeve 606 is installed and fixed in the valve frame 605, the outer side wall of the upper part of the second valve rod 607 is provided with threads, the second valve rod 607 is in threaded fit with the threaded sleeve 606, a rotary disc 609 is fixed at the top of the second valve rod 607, the second valve rod 607 is rotatably matched and connected with the valve plate 608, the auxiliary valve 6 is used for controlling the opening and closing of the auxiliary valve 6, the pipeline fluid is directly controlled, the convenience is provided for the subsequent pressure reduction adjustment of the main valve 1, the obstruction of the pressure in the pipeline in the adjustment process of the main valve 1 is relieved, the auxiliary valve 6 is arranged for assistance, so that the pressure reduction operation of the regulating valve is shared by two independent valves, the pressure suffered by the main valve 1 is reduced, the main valve 1 is more durable, the service life of the regulating valve is further prolonged, meanwhile, the auxiliary valve 6 is arranged for auxiliary pressure reduction adjustment, the range of the pressure reduction adjustment of the regulating valve is larger, the application range of the regulating valve is further improved, meanwhile, the auxiliary pressure reduction adjustment is carried out through the auxiliary valve 6, the auxiliary valve 6 is matched with the main valve 1, the finer pressure range can be matched and adjusted, the application precision of the regulating valve is improved, the regulating valve is more manual and labor-saving through the arrangement of the rotary table 609, meanwhile, the second valve rod 607 is rotated to be more accurate in lifting adjustment through the arrangement of the screw thread on the second valve rod 607, and meanwhile, the situation that the second valve rod 607 slides and moves is avoided, by arranging the valve hole 603 and the valve plate 608, when the auxiliary valve 6 is completely closed, the pipeline fluid is cut off more completely;

the joint 7 is of a hollow cylinder structure, the size of the top section of the joint 7 is matched with that of the bottom section of the first valve body 2, and the top of the joint 7 is connected with the bottom of the first valve body 2 through a bolt.

First valve body 2 is hollow structure, and the bottom of first valve body 2 and the one side that is close to auxiliary valve 6 all are equipped with the opening, and first valve body 2 is close to auxiliary valve 6's opening part and is fixed with second mounting panel 202, and second mounting panel 202 is ring type structure, and 2 bottom openings of first valve body are fixed with first mounting panel 201, and first mounting panel 201 is ring type structure, through setting up first mounting panel 201 and second mounting panel 202, makes things convenient for the installation of first valve body 2.

Second valve body 601 is hollow structure, and the both ends of second valve body 601 all are equipped with the opening, and second valve body 601 both ends opening part all is fixed with third mounting panel 602, and one of them third mounting panel 602 that is close to first valve body 2 passes through the bolt to be connected with second mounting panel 202, and third mounting panel 602 directly fills up with second mounting panel 202 and is equipped with sealed plastic pad, through setting up sealed plastic pad, strengthens the leakproofness of this governing valve.

The valve seat 203 and the valve cage 204 are arranged in the first valve body 2, the valve seat 203 and the valve cage 204 are both located right above the bottom opening of the first valve body 2, the valve cage 204 is located right above the valve seat 203, the size of the cross section of the valve seat 203 is matched with that of the cross section of the cascade valve clack 502, and the cascade valve clack 502 is movably matched in the valve seat 203 and the valve cage 204.

The top of first valve body 2 is equipped with the opening, and first valve rod 5 penetrates inside first valve body 2 from 2 top openings of first valve body, is equipped with the packing between first valve rod 5 and the 2 top openings of first valve body, through setting up the packing, makes first valve rod 5 inseparabler with laminating before the 2 top openings of first valve body to improve the leakproofness of this governing valve.

The bottom of rod frame 4 is connected with gland 401, and gland 4 is installed at first 2 top openings of valve body, is equipped with gland packing lid between gland 4 and the 2 openings of first valve body, and the top of rod frame 4 is connected with lantern ring 402, and first valve rod 5 runs through lantern ring 402 and gland 4, and first valve rod 5 sliding fit is in lantern ring 402, and the equal vertical welding of two inside walls of rod frame 4 has slide rail 403.

The slider 501 has been cup jointed on the first valve rod 5, the equal vertical spout of having seted up in both ends of slider 501, two spouts respectively with even a slide rail 403 adaptation, slider 501 is on two slide rails 403 through two spout sliding fit, through setting up slider 501, and with slider 501 sliding fit on two slide rails 403, make the steadier that first valve rod 5 reciprocated, and then make the more stable smooth and easy that cascade valve clack 502 removed, thereby improve the stability and the reliability that this governing valve used.

The middle part of the second valve body 601 is provided with a valve hole 603, the valve hole 603 is formed by two valve holes 603 and through holes in the middle parts of two steel plates which are arranged in parallel, the distance between the two steel plates which are arranged in parallel is equal to the thickness of the valve plate 608, and the valve plate 608 is movably matched between the two steel plates which are arranged in parallel.

The top of the second valve body 601 is provided with an opening, the opening at the top of the second valve body 601 is covered with a valve cover 604, the central opening at the top of the valve cover 604 is provided with a rotary hole, the rotary hole is communicated with the inside of the second valve body 601, a second valve rod 607 is rotatably matched in the rotary hole, a valve frame 605 is arranged at the opening at the top of the second valve body 601, and the bottom of the valve frame 605.

The using method of the cascade multistage depressurization regulating valve specifically comprises the following steps:

the method comprises the following steps: the third mounting plate 602 of the regulating valve is fixed with a pipeline through a bolt, and the bottom of the regulating valve joint 7 is connected with the other section of the pipeline through the bolt, so that the mounting of the regulating valve is completed;

step two: the second valve rod 607 is rotated by rotating the rotary disk 609, the second valve rod 607 is moved up and down by rotating in the threaded sleeve 606, the valve plate 608 is moved in the valve hole 603 by moving the second valve rod 607 up and down, and the opening and closing of the sub-valve 6 are controlled by moving the valve plate 608 in the valve hole 603;

step three: the first valve rod 5 is driven by the actuator 301, the cascade valve flap 502 is driven by the first valve rod 5, the cascade valve flap 502 moves in the valve seat 203 and the valve cage 204, when the cascade valve flap 502 moves into the valve seat 203, the main valve 1 is in a closed state, when the cascade valve flap 502 moves into the valve cage 204, the main valve 1 is in an open state, and the cascade valve flap 502 is controlled to slowly move towards the valve seat 203 by the driving of the actuator 301, so that the pressure reduction regulation function of the regulating valve is realized.

When in use, firstly, the third mounting plate 602 of the regulating valve is fixed with a pipeline through a bolt, the bottom of the regulating valve joint 7 is connected with the other section of the pipeline through a bolt to complete the mounting of the regulating valve, the regulating valve is mounted and fixed through a bolt, the mounting and the dismounting of the regulating valve are simpler, and the mounting, the use and the replacement of the regulating valve are further facilitated, so that the convenience of the use of the regulating valve is improved, meanwhile, the mounting difficulty of the regulating valve is reduced by facilitating the mounting and the use of the regulating valve, thereby being beneficial to the popularization of the regulating valve, the regulating valve is formed by connecting the main valve 1 and the auxiliary valve 6, so that the regulating valve is convenient to disassemble and combine, the space occupation of the regulating valve is smaller by simplifying and facilitating the disassembly of the regulating valve, and the storage, carrying and the transportation of the regulating valve are further facilitated, therefore, the carrying and the use of the regulating valve are facilitated, the combination of the regulating valve is simpler, the assembly and the use of users are facilitated, the assembly and the use efficiency are improved, meanwhile, the disassembly and the combination of the regulating valve are more convenient, the later replacement and the maintenance of the regulating valve are facilitated, the service life of the regulating valve is prolonged, the regulating valve consists of a main valve 1 and an auxiliary valve 6, the main valve 1 and the auxiliary valve 6 can be independently used like the traditional valve, when the regulating valve is used, the main valve 1 and the auxiliary valve 6 can be matched in multiple groups or independently installed and used according to actual conditions, the installation and the use of the regulating valve are more flexible, the use flexibility of the regulating valve is improved, meanwhile, the regulating valve can also be used for dealing with more different pipeline conditions, and the use range of the regulating valve is improved, the joint 7 can be used as an extension interface of the regulating valve, so that the regulating valve is not limited and narrow in space in the installation process, the application range of the regulating valve is improved, the joint 7 can produce different sizes, the regulating valve can be compatible with and adapt to pipelines with different sizes, compared with the production of a regulating valve which is adaptive to the pipelines, the pipeline with different sizes is adapted through the joint, the pipeline is simpler, more convenient and more economical and practical, meanwhile, by arranging the joint 7, the overlong at the joint of the regulating valve and the pipeline is not needed, namely the overlong at the bottom of the first valve body 2 is not needed, the inside of the first valve body 2 is further conveniently cleaned, the cleaning work inside the regulating valve is facilitated, then, the second valve rod 607 is rotated through rotating the rotary table 609, the second valve rod 607 rotates through rotating in the threaded sleeve 606 and moves up and down, the valve plate 608 moves in the valve hole 603 by moving the second valve rod 607 up and down, the opening and closing of the auxiliary valve 6 are controlled by moving the valve plate 608 in the valve hole 603, the auxiliary valve 6 is used to control the opening and closing of the auxiliary valve 6, the pipeline fluid is directly controlled, the pressure reduction adjustment is convenient for the subsequent control of the main valve 1, the obstruction of the pressure in the pipeline in the adjustment process of the main valve 1 is relieved, the pressure reduction operation of the adjusting valve is shared between two independent valves by arranging the auxiliary valve 6 for assistance, the pressure suffered by the main valve 1 is reduced, the main valve 1 is more durable, the service life of the adjusting valve is further prolonged, meanwhile, the auxiliary pressure reduction adjustment is carried out by arranging the auxiliary valve 6, the range of the pressure reduction adjustment of the adjusting valve is larger, the use range of the adjusting valve is further improved, and the auxiliary pressure reduction adjustment is carried out by the auxiliary valve 6, the auxiliary valve 6 and the main valve 1 are matched with each other to adjust a finer pressure range, so that the use precision of the regulating valve is improved, the regulating valve is more labor-saving by arranging the rotary disk 609, meanwhile, the second valve rod 607 is rotated and lifted to adjust more accurately by arranging a thread on the second valve rod 607, and meanwhile, the situation that the second valve rod 607 slides and moves is avoided, when the auxiliary valve 6 is completely closed by arranging the valve hole 603 and the valve plate 608, the pipeline fluid is cut off more thoroughly, finally, the first valve rod 5 is driven by the execution mechanism 301, the first valve rod 5 drives the cascade valve clack 502, the cascade valve clack 502 moves in the valve seat 203 and the valve cage 204, when the cascade valve clack 502 moves into the valve seat 203, the main valve 1 is in a closed state, when the cascade valve clack 502 moves into the valve cage 204, the main valve 1 is in an open state, and is driven by the execution mechanism 301, control cascade valve clack 502 slowly moves to disk seat 203, realize the step-down regulatory function of this governing valve, through setting up main valve 1, make this governing valve can realize pipeline flow control's function, through setting up cascade valve clack 502, realize the multistage throttle of this governing valve, can effectively reduce the velocity of flow, reduce the washing away of fluid to the case, thereby further prolong the life of this governing valve, through using cascade valve clack 502, it is even to make each grade step-down, avoid last one-level to form the high pressure difference cavitation erosion that appears, through setting up slider 501, and with slider 501 sliding fit on two slide rails 403, make the more steady that first valve rod 5 reciprocated, and then make more stable smooth and easy that cascade valve clack 502 removed, thereby improve stability and reliability that this governing valve used.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.