CN109139931B

CN109139931B - Gate valve with steady voltage structure

Info

Publication number: CN109139931B
Application number: CN201811252235.4A
Authority: CN
Inventors: 斯武君
Original assignee: Ningbo Valve Manufacturing Co ltd
Current assignee: Ningbo Valve Manufacturing Co ltd
Priority date: 2018-10-25
Filing date: 2018-10-25
Publication date: 2023-10-20
Anticipated expiration: 2038-10-25
Also published as: CN109139931A

Abstract

The application relates to the technical field of gate valves, in particular to a gate valve with a pressure stabilizing structure, which comprises a shell, a shell cover, a valve core, a pressure stabilizing mechanism and a valve closing mechanism, wherein the shell and the shell cover are fixedly connected together from top to bottom, the valve core can be vertically and slidably arranged in the shell cover, the bottom end of the pressure stabilizing mechanism is fixedly connected with the top end of the valve core, the valve closing mechanism can be slidably arranged in the valve core, the valve closing mechanism vertically penetrates through the pressure stabilizing mechanism and extends to the outer side of the pressure stabilizing mechanism, two sides of the shell are respectively provided with a water inlet pipe and a water outlet pipe which penetrate through the shell and are communicated with an inner cavity of the shell, a first partition plate and a second partition plate are arranged in the inner cavity of the shell, the first partition plate is horizontally arranged above the water inlet pipe and the water outlet pipe and is fixedly connected with the inner wall of the shell, the second partition plate is vertically arranged beside the water outlet pipe and is fixedly connected with the inner wall of the shell and the bottom end of the first partition plate, and the gate valve and the pressure reducing valve can be simultaneously realized.

Description

Gate valve with steady voltage structure

Technical Field

The application relates to the technical field of gate valves, in particular to a gate valve with a pressure stabilizing structure.

Background

The gate valve is a shutter, the moving direction of the shutter is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. The pressure reducing valve is a valve which reduces the inlet pressure to a certain required outlet pressure through adjusting action and automatically keeps the outlet pressure stable by means of the energy of a medium, and is widely applied in various industries and is well known.

The gate valve is often used by matching with a pressure reducing valve, when the pressure reducing valve is not arranged, the flow is unchanged due to the fact that the gate valve is closed by half, the pressure at the water outlet is increased, and the water flow speed is increased; when the pressure reducing valve is arranged, the flow is halved when the gate valve is closed for half, the pressure at the water outlet is unchanged, and the water flow speed is unchanged; when the pressure reducing valve is installed, the water flow pressure of the water inlet is continuously changed when the gate valve is completely opened, and the water outlet pressure and the water flow speed are kept within a certain range.

Chinese patent CN204985903U discloses a precise pressure reducing valve, which comprises a valve body, a pressure stabilizing seat, a valve cover, an adjusting hand wheel, a pressure adjusting spring, a pressure stabilizing membrane assembly, an overflow membrane assembly, a valve core and a locking cover, wherein the pressure stabilizing membrane assembly comprises a pressure stabilizing plug, a first pressure stabilizing disc, a first membrane, a middle sleeve and a second membrane, and a first return spring is arranged between the pressure stabilizing plug and the pressure stabilizing seat; the upper end of the pressure stabilizing seat is respectively extended with a boss and a cylinder body surrounding the periphery of the boss, the boss is provided with an air guide hole communicated with the second cavity, the top end of the boss is provided with a steel ball, and the top end of the cylinder body is provided with a clamping reed matched with the steel ball stop; the overflow diaphragm assembly comprises a tray seat, a third diaphragm and a fourth diaphragm, wherein a tray and a tray cover which is correspondingly matched with the tray are arranged between the third diaphragm and the fourth diaphragm. The application has the advantages of convenient processing, low manufacturing cost, quick assembly, good steel ball resetting effect, good pressure stabilizing and discharging effects, high pressure regulating precision and stable working performance. The pressure reducing valve disclosed in this patent has a good pressure reducing effect, but does not have the function of a gate valve.

In the prior art, the pressure reducing valve is arranged between the water inlet and the gate valve, so that two access ends are required to be arranged on a pipeline, the more the access ends of the pipeline are, the more easily damaged and the more difficult to maintain, and the gate valve with a pressure stabilizing structure is required to be capable of independently realizing all functions of the pressure reducing valve and the gate valve.

Disclosure of Invention

Aiming at the defects of the prior art, the application provides the valve which can realize the functions of a gate valve and a pressure reducing valve at the same time.

The application discloses a gate valve with a pressure stabilizing structure, which comprises a shell, a shell cover, a valve core, a pressure stabilizing mechanism and a valve closing mechanism, wherein the shell and the shell cover are fixedly connected together from top to bottom, the valve core can be vertically and slidably arranged in the shell, the pressure stabilizing mechanism is fixedly arranged in the shell cover, the bottom end of the pressure stabilizing mechanism is fixedly connected with the top end of the valve core, the valve closing mechanism is slidably arranged in the valve core, and the valve closing mechanism vertically penetrates through the pressure stabilizing mechanism upwards and extends to the outer side of the pressure stabilizing mechanism.

Further, the casing both sides are provided with respectively and run through casing and communicate into water inlet pipe and the outlet pipe of the inside cavity of casing, be provided with first baffle and second baffle in the inside cavity of casing, first baffle level sets up in the top of water inlet pipe and outlet pipe and with the inner wall fixed connection of casing, the vertical side that sets up at the outlet pipe and with the inner wall of casing and the bottom fixed connection of first baffle of second baffle, first baffle and second baffle separate into three cavity with the inside cavity of casing, this three cavity is the first cavity with the water inlet pipe intercommunication respectively, be located the second cavity of first baffle top and with the third cavity of outlet pipe intercommunication, be provided with first apopore and the second apopore of vertical running through first baffle on the first baffle, first apopore intercommunication first cavity and second cavity, second apopore intercommunication second cavity and third cavity, the case slidable sets up in first apopore.

Further, the valve core comprises a guide post, a connecting post and a plug which are sequentially connected from top to bottom, the connecting post is positioned in the first water outlet hole, the outer diameter of the connecting post is smaller than the inner diameter of the first water outlet hole, the guide post is positioned above the first partition plate, the plug is positioned below the first partition plate, the plug is in a truncated cone shape which vertically downward and outwards extends, the outer diameter of the plug is larger than the inner diameter of the first water outlet hole, and the top end of the guide post is fixedly connected with the bottom end of the pressure stabilizing mechanism.

Furthermore, a guide mechanism is arranged in the second cavity and comprises a guide sleeve and a bracket fixedly connected with the guide sleeve and the inner wall of the shell, the guide sleeve is vertically arranged and is in sliding fit with the guide post.

Furthermore, the bottom end of the plug is provided with a plug guide rod which extends vertically downwards, the bottom end of the shell is provided with a plug guide hole which is in sliding fit with the plug guide rod, and the outer side of the plug guide rod is sleeved with a buffer mechanism which is fixedly arranged at the bottom end of the inner wall of the shell.

Further, the pressure stabilizing mechanism comprises a diaphragm, a fixed plate and a spring, wherein the diaphragm is fixedly arranged between the shell and the shell cover, a diaphragm fixing groove for fixing the outer edge of the diaphragm is formed in the top end of the shell, the fixed plate, the diaphragm and the valve core are arranged from top to bottom and are fixedly connected through bolts, and the spring is arranged at the top end of the fixed plate.

Still further, be provided with the elasticity regulation structure that is located the cap inside on the spring, elasticity regulation structure is including the preforming and elasticity regulation post under the spring, the preforming is including vertical downwardly extending and with the hemisphere casing of spring inner wall butt and from the outside annular flange that extends of the marginal level of hemisphere casing and with spring top butt, the cap top is provided with the sleeve coaxial with the case, elasticity regulation post is installed at the sleeve inside and with the preforming butt under the spring, elasticity regulation post and sleeve screw-thread fit, the operation handle is installed at elasticity regulation post top.

Still further, valve closing mechanism is including vertically running through the lifter of elasticity regulation structure, fixed plate, diaphragm and guide pillar, and the spring housing is established on the lifter, and the bottom and the top of lifter are provided with slider and stop respectively, and the guide pillar is inside to be provided with slider sliding fit's spout, and the guide pillar top is provided with the spout shutoff lid with lifter clearance fit and shutoff spout, the top butt of stop and operating handle.

Further, the valve closing mechanism further comprises a linear bearing, a bearing fixing groove is formed in the fixing plate, the linear bearing is fixedly arranged in the bearing fixing groove, and the linear bearing is in sliding fit with the lifting rod.

Further, opening indication marks are arranged at the top end of the shell cover and the top end of the operating handle.

The beneficial effects are that:

after the water inlet pipe is passed through the first cavity, the first water outlet hole, the second cavity, the second water outlet hole and the third cavity in turn and finally discharged by the water outlet pipe, the bottom end of the first water outlet hole is provided with a plug which can vertically slide up and down to open and close the first water outlet hole, the plug is fixedly connected with a guide post through a connecting post, the guide post is fixedly arranged on a diaphragm, after the water outlet is closed, the water pressure in the third cavity and the second cavity is gradually increased to jack up the diaphragm upwards against the elasticity of a spring, the diaphragm drives the guide post and the plug to move upwards to block the first water outlet hole by the plug, the pressure of the water outlet is constant to the elasticity of the spring, the top end of the spring is provided with a spring lower pressing sheet capable of pressing the spring downwards and an elastic force adjusting column for controlling the lifting of the spring lower pressing sheet, the lifting of the elastic force adjusting column is controlled through the operating handle arranged on the elastic force adjusting column, the spring is pressed down or released by the spring, the pressure of the spring is adjusted, the sliding block is arranged in the guide column and is connected with the operating handle through the lifting rod and the stop block, the guide column is not affected by the sliding block when the gate valve is opened, the height of the elastic force adjusting column is adjusted through the operating handle when the gate valve is required to be closed, the height of the sliding block is adjusted, the sliding block drives the guide column to move upwards and block the first water outlet through the plug, the gate valve is closed, and the plug can be moved upwards a small distance through adjusting the operating handle to semi-seal the first water outlet, so that the flow of the valve body is adjusted.

The valve can simultaneously realize the functions of a gate valve and a pressure reducing valve.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

FIG. 1 is a perspective view of an embodiment;

FIG. 2 is a cross-sectional view of an embodiment;

FIG. 3 is a perspective cross-sectional view of an embodiment;

FIG. 4 is a cross-sectional view of a housing and a housing cover of an embodiment;

FIG. 5 is a perspective cross-sectional view of a housing and a cover of an embodiment;

FIG. 6 is a perspective view of a valve cartridge, a pressure stabilizing mechanism, and a valve closing mechanism of an embodiment;

FIG. 7 is a cross-sectional view of the valve spool, pressure stabilizing mechanism, and valve closing mechanism of the embodiment;

FIG. 8 is an exploded perspective view of a pressure stabilizing mechanism and a valve closing mechanism of an embodiment;

FIG. 9 is an exploded perspective view of the pressure stabilizing mechanism and valve cartridge of the embodiment;

fig. 10 is a perspective exploded view of the pressure stabilizing mechanism and the valve core according to the embodiment.

Reference numerals illustrate:

the device comprises a shell 1, a water inlet pipe 1a, a water outlet pipe 1b, a first partition plate 1c, a first cavity 1c1, a second cavity 1c2, a first water outlet 1c3, a second partition plate 1d, a third cavity 1d1, a second water outlet 1d2, a guide mechanism 1e, a guide sleeve 1e1, a support 1e2, a diaphragm fixing groove 1f, a shell cover 2, a sleeve 2a, a valve core 3, a guide pillar 3a, a sliding groove 3a1, a sliding groove blocking cover 3a2, a connecting column 3b, a plug 3c, a plug guide rod 3c1, a plug guide hole 3c2, a buffer mechanism 3d, a pressure stabilizing mechanism 4, a diaphragm 4a, a fixing plate 4b, a bearing fixing groove 4b1, a spring 4c, an elastic force adjusting structure 4d1, an elastic force adjusting column 4d2, an operating handle 4d3, a valve closing mechanism 5, a lifting rod 5a, a slider 5a1, a stop block 5a2 and a linear bearing 5b.

Detailed Description

Various embodiments of the application are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the application. That is, in some embodiments of the application, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the application solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

Referring to a gate valve with a pressure stabilizing structure shown in fig. 1 to 10, the gate valve comprises a shell 1, a shell cover 2, a valve core 3, a pressure stabilizing mechanism 4 and a valve closing mechanism 5, wherein the shell 1 and the shell cover 2 are fixedly connected together from top to bottom, the valve core 3 can be vertically and slidably installed inside the shell 1, the pressure stabilizing mechanism 4 is fixedly installed inside the shell cover 2, the bottom end of the pressure stabilizing mechanism 4 is fixedly connected with the top end of the valve core 3, the valve closing mechanism 5 can be slidably installed inside the valve core 3, the valve closing mechanism 5 vertically penetrates through the pressure stabilizing mechanism 4 and extends to the outer side of the pressure stabilizing mechanism 4, the shell 1 and the shell cover 2 jointly form a valve body, liquid penetrates through the valve body, the valve core 3 controls the opening and closing of a liquid channel in the valve body, the pressure stabilizing mechanism 4 changes along with the change of the liquid pressure in the valve body, so that the pressure stabilizing mechanism 4 can control the valve core 3 to open and close the liquid channel according to the pressure in the valve body, and the valve closing mechanism 5 penetrates through the pressure stabilizing mechanism 4 to be directly connected with the valve core 3, so that the valve body can be opened and closed by manually controlling the valve core 3 to open and close the liquid channel according to the pressure in the water outlet of the gate valve.

The two sides of the shell 1 are respectively provided with a water inlet pipe 1a and a water outlet pipe 1b which penetrate through the shell 1 and are communicated with the internal cavity of the shell 1, the internal cavity of the shell 1 is internally provided with a first partition board 1c and a second partition board 1d, the first partition board 1c is horizontally arranged above the water inlet pipe 1a and the water outlet pipe 1b and is fixedly connected with the inner wall of the shell 1, the second partition board 1d is vertically arranged at the side of the water outlet pipe 1b and is fixedly connected with the inner wall of the shell 1 and the bottom end of the first partition board 1c, the first partition board 1c and the second partition board 1d divide the internal cavity of the shell 1 into three cavities, the three cavities are respectively a first cavity 1c1 communicated with the water inlet pipe 1a, a second cavity 1c2 positioned above the first partition board 1c and a third cavity 1d1 communicated with the water outlet pipe 1b, a first water outlet hole 1c3 and a second water outlet hole 1d2 which vertically penetrate through the first partition board 1c are arranged on the first partition board 1c, the first water outlet hole 1c3 is communicated with the first cavity 1c1 and the second cavity 1c2, the second water outlet hole 1d2 is communicated with the second cavity 1c2 and the third cavity 1d1, the valve core 3 is slidably arranged in the first water outlet hole 1c3, liquid enters the valve body through the water inlet pipe 1a, then the liquid sequentially passes through the first cavity 1c1, the first water outlet hole 1c3, the second cavity 1c2, the second water outlet hole 1d2 and the third cavity 1d1 and finally leaves the valve body through the water outlet pipe 1b, when the water outlet is closed, the internal pressure of the valve body is increased, the valve core 3 is driven by the pressure stabilizing mechanism 4 to block the first water outlet hole 1c3, and when the water outlet is opened, the liquid is discharged through the water outlet pipe 1b, so that the pressure in the third cavity 1d1 and the second cavity 1c2 is reduced, and the valve core 3 is driven by the pressure stabilizing mechanism 4 to open by the pressure stabilizing mechanism 4.

The valve core 3 comprises a guide post 3a, a connecting post 3b and a plug 3c which are sequentially connected from top to bottom, the connecting post 3b is positioned in the first water outlet 1c3, the outer diameter of the connecting post 3b is smaller than the inner diameter of the first water outlet 1c3, the guide post 3a is positioned above the first partition board 1c, the plug 3c is positioned below the first partition board 1c, the plug 3c is in a vertically downward and outwards extending truncated cone shape, the outer diameter of the plug 3c is larger than the inner diameter of the first water outlet 1c3, the top end of the guide post 3a is fixedly connected with the bottom end of the pressure stabilizing mechanism 4, liquid in the first cavity 1c1 enters the second cavity 1c2 through a gap between the first water outlet 1c3 and the connecting post 3b, and the pressure stabilizing mechanism 4 is lifted along with the pressure lifting in the valve body, so that the pressure stabilizing mechanism 4 drives the guide post 3a to lift, and the guide post 3a drives the plug 3c to lift so as to block the first water outlet 1c3 or open the first water outlet 1c3.

The second cavity 1c2 is internally provided with a guide mechanism 1e, the guide mechanism 1e comprises a guide sleeve 1e1 and a bracket 1e2 fixedly connected with the guide sleeve 1e1 and the inner wall of the shell 1, the guide sleeve 1e1 is vertically arranged, the guide sleeve 1e1 is in sliding fit with the guide pillar 3a, the guide mechanism 1e enables the guide pillar 3a to vertically slide up and down in the guide sleeve 1e1 only, and therefore when the first water outlet hole 1c3 is required to be closed by the plug 3c, the plug 3c can be tightly attached to the first water outlet hole 1c3.

The bottom of the plug 3c is provided with a plug guide rod 3c1 which vertically extends downwards, the bottom of the shell 1 is provided with a plug guide hole 3c2 which is in sliding fit with the plug guide rod 3c1, the outer side of the plug guide rod 3c1 is sleeved with a buffer mechanism 3d which is fixedly arranged at the bottom of the inner wall of the shell 1, the buffer mechanism 3d provides a buffer effect for the movement of the valve core 3 for the elastic sleeve, and the plug guide rod 3c1 and the plug guide hole 3c2 serve as guide mechanisms to jointly act with the guide mechanism 1e, so that the valve core 3 can only vertically move up and down, and the tightness of the valve core 3 is ensured.

The pressure stabilizing mechanism 4 comprises a diaphragm 4a, a fixed plate 4b and a spring 4c, wherein the diaphragm 4a is fixedly arranged between the shell 1 and the shell cover 2, a diaphragm fixing groove 1f for fixing the outer edge of the diaphragm 4a is formed in the top end of the shell 1, the fixed plate 4b, the diaphragm 4a and the valve core 3 are arranged from top to bottom and are fixedly connected through bolts, the spring 4c is arranged on the top end of the fixed plate 4b, the diaphragm 4a separates a cavity formed in the shell 1 and the shell cover 2, so that liquid can only flow below the diaphragm 4a, the spring 4c provides a downward elastic force for the diaphragm 4a, when the liquid pressure in the second cavity 1c2 is increased, the liquid overcomes the elastic force of the spring 4c to jack up the diaphragm 4a upwards, so that the diaphragm 4a drives the guide pillar 3a to move upwards to enable the plug 3c to plug the first water outlet 1c3, and when the liquid pressure in the second cavity 1c2 is reduced, the return elastic force of the spring 4c drives the diaphragm 4a to move downwards to enable the guide pillar 3a to move downwards to enable the plug 3c to leave the first water outlet 3.

The spring 4c is provided with an elastic force adjusting structure 4d positioned in the shell cover 2, the elastic force adjusting structure 4d comprises a spring lower pressing sheet 4d1 and an elastic force adjusting column 4d2, the spring lower pressing sheet 4d1 comprises a hemispherical shell which vertically extends downwards and is abutted against the inner wall of the spring 4c and an annular flange which horizontally extends outwards from the edge of the hemispherical shell and is abutted against the top end of the spring 4c, the top end of the shell cover 2 is provided with a sleeve 2a coaxial with the valve core 3, the elastic force adjusting column 4d2 is installed in the sleeve 2a and is abutted against the spring lower pressing sheet 4d1, the elastic force adjusting column 4d2 is in threaded fit with the sleeve 2a, the top end of the elastic force adjusting column 4d2 is provided with an operating handle 4d3, a worker adjusts the lifting of the elastic force adjusting column 4d2 through the operating handle 4d3, the elastic force adjusting column 4d2 is abutted against the hemispherical shell of the spring lower pressing sheet 4d1 and presses downwards so that the spring 4c is pressed downwards, and the elastic force of the spring 4c is increased, and conversely the elastic force of the spring 4c is reduced by the upward elastic force adjusting column 4d 2.

The valve closing mechanism 5 comprises a lifting rod 5a vertically penetrating through an elastic force adjusting structure 4d, a fixing plate 4b, a diaphragm 4a and a guide pillar 3a, a spring 4c is sleeved on the lifting rod 5a, a sliding block 5a1 and a stop block 5a2 are respectively arranged at the bottom end and the top end of the lifting rod 5a, a sliding groove 3a1 in sliding fit with the sliding block 5a1 is arranged in the guide pillar 3a, a sliding groove plugging cover 3a2 in clearance fit with the lifting rod 5a and plugging the sliding groove 3a1 is arranged at the top end of the guide pillar 3a, the stop block 5a2 is abutted with the top end of an operating handle 4d3, when the valve body needs to be closed manually, a worker can operate the elastic force adjusting column 4d2 to move upwards through the operating handle 4d3, the operating handle 4d3 is abutted with the stop block 5a2, the lifting rod 5a is driven to move upwards together by the operating handle 4d3, the sliding block 5a1 slides in the sliding groove 3a and is abutted with the sliding groove cover 3a2, the sliding block 5a1 is driven to move upwards, the sliding block 5a 3a is finally, the sliding block 3a moves the guide pillar 3a and the first water outlet plug 3c is plugged, and the valve body 3c is closed.

The valve closing mechanism 5 further comprises a linear bearing 5b, a bearing fixing groove 4b1 is formed in the fixing plate 4b, the linear bearing 5b is fixedly arranged in the bearing fixing groove 4b1, the linear bearing 5b is in sliding fit with the lifting rod 5a, the lifting rod 5a can slide more smoothly relative to the guide column 3a through the linear bearing 5b, and gate valve faults caused by clamping between the guide column 3a and the lifting rod 5a are avoided.

The top of the shell cover 2 and the top of the operating handle 4d3 are provided with opening indication marks, the opening indication marks can be an arrow arranged at the top of the operating handle 4d3 and a plurality of mark points at the top of the shell cover 2, different mark points of the arrow on the operating handle 4d3 at the top of the shell cover 2 indicate different opening and closing degrees, when the height of the elastic force adjusting column 4d2 changes, the elastic force of the spring 4c changes along with the change, the height of the sliding block 5a1 also changes along with the change, the vertical sliding distance of the guide column 3a is influenced by the height of the sliding block 5a1, the maximum distance between the plug 3c and the first water outlet 1c3 is further influenced, the flow of liquid passing through the first water outlet 1c3 is finally influenced, and a worker can adjust the water pressure and the flow in the water outlet 1b by operating the operating handle 4d 3.

Working principle:

after passing through the water inlet pipe 1a, liquid sequentially passes through the first cavity 1c1, the first water outlet 1c3, the second cavity 1c2, the second water outlet 1d2 and the third cavity 1d1 and is finally discharged by the water outlet pipe 1b, a plug 3c capable of vertically sliding up and down to open and close the first water outlet 1c3 is arranged at the bottom end of the first water outlet 1c3, the plug 3c is fixedly connected with a guide column 3a through a connecting column 3b, the guide column 3a is fixedly arranged on a diaphragm 4a, after the water outlet is closed, the water pressure in the third cavity 1d1 and the second cavity 1c2 is gradually increased to overcome the elasticity of the spring 4c to jack up the diaphragm 4a upwards, the diaphragm 4a drives the guide column 3a and the plug 3c to move upwards to plug 3c to plug the first water outlet 1c3, the pressure of the water outlet is constant to be the elasticity of the spring 4c, the top end of the spring 4c is provided with a spring lower pressing piece 4d1 capable of pressing the spring 4c downwards and an elastic adjusting column 4d2 which controls the lifting of the spring lower pressing piece 4d1, the lifting of the elastic force adjusting column 4d2 is controlled by an operation handle 4d3 arranged on the elastic force adjusting column 4d2, so that the spring 4c is pressed down or released by a spring pressing sheet 4d1, the pressure of the spring 4c is adjusted, a sliding block 5a1 is arranged in a guide column 3a, the sliding block 5a1 is connected with the operation handle 4d3 through a lifting rod 5a and a stop block 5a2, the guide column 3a is not influenced by the sliding block 5a1 when a gate valve is opened, when the gate valve is required to be closed, the height of the sliding block 5a1 is adjusted by adjusting the height of the elastic force adjusting column 4d2 through the operation handle 4d3, the sliding block 5a1 drives the guide column 3a to move upwards and the first water outlet 1c3 is blocked through a plug 3c, the gate valve is closed, the plug 3c is moved upwards by a small distance through adjusting the operation handle 4d3, the flow of the valve body is adjusted, the valve body can simultaneously realize the functions of a gate valve and a pressure reducing valve.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present application, should be included in the scope of the claims of the present application.

Claims

1. Gate valve with steady voltage structure, its characterized in that: the valve comprises a shell (1), a shell cover (2), a valve core (3), a pressure stabilizing mechanism (4) and a valve closing mechanism (5), wherein the shell (1) and the shell cover (2) are fixedly connected together from top to bottom, the valve core (3) can be vertically and slidably arranged in the shell (1), the pressure stabilizing mechanism (4) is fixedly arranged in the shell cover (2) and the bottom end of the pressure stabilizing mechanism (4) is fixedly connected with the top end of the valve core (3), the valve closing mechanism (5) is slidably arranged in the valve core (3) and the valve closing mechanism (5) vertically and upwards penetrates through the pressure stabilizing mechanism (4) and extends to the outer side of the pressure stabilizing mechanism (4);

the utility model provides a water inlet pipe (1 a) and outlet pipe (1 b) that run through casing (1) and communicate casing (1) inside cavity are provided with respectively in casing (1) the inside cavity, be provided with first baffle (1 c) and second baffle (1 d) in casing (1) inside cavity, first baffle (1 c) level sets up in the top of water inlet pipe (1 a) and outlet pipe (1 b) and with the inner wall fixed connection of casing (1), second baffle (1 d) vertical setting is at the side of outlet pipe (1 b) and with the inner wall of casing (1) and the bottom fixed connection of first baffle (1 c), first baffle (1 c) and second baffle (1 d) separate casing (1) inside cavity into three cavity, this three cavity is first cavity (1 c 1) with water inlet pipe (1 a) intercommunication respectively, second cavity (1 c 2) and third cavity (1 d 1) with outlet pipe (1 b) intercommunication that are located first baffle (1 c) top, first baffle (1 c) is provided with first water outlet hole (1 c) and second cavity (1 c) 3 hole (1 d) of first baffle (1 c) and second baffle (1 c) intercommunication, the valve core (3) is slidably arranged in the first water outlet hole (1 c 3);

the valve core (3) comprises a guide post (3 a), a connecting post (3 b) and a plug (3 c) which are sequentially connected from top to bottom, the connecting post (3 b) is positioned in the first water outlet hole (1 c 3), the outer diameter of the connecting post (3 b) is smaller than the inner diameter of the first water outlet hole (1 c 3), the guide post (3 a) is positioned above the first partition plate (1 c), the plug (3 c) is positioned below the first partition plate (1 c), the plug (3 c) is in a vertically downward and outwards extending truncated cone shape, the outer diameter of the plug (3 c) is larger than the inner diameter of the first water outlet hole (1 c 3), and the top end of the guide post (3 a) is fixedly connected with the bottom end of the pressure stabilizing mechanism (4);

the pressure stabilizing mechanism (4) comprises a diaphragm (4 a), a fixing plate (4 b) and a spring (4 c), wherein the diaphragm (4 a) is fixedly arranged between the shell (1) and the shell cover (2), a diaphragm fixing groove (1 f) for fixing the outer edge of the diaphragm (4 a) is formed in the top end of the shell (1), the fixing plate (4 b), the diaphragm (4 a) and the valve core (3) are arranged from top to bottom and are fixedly connected through bolts, and the spring (4 c) is arranged at the top end of the fixing plate (4 b);

the spring (4 c) is provided with an elastic force adjusting structure (4 d) positioned in the shell cover (2), the elastic force adjusting structure (4 d) comprises a spring lower pressing sheet (4 d 1) and an elastic force adjusting column (4 d 2), the spring lower pressing sheet (4 d 1) comprises a hemispherical shell which vertically extends downwards and is in butt joint with the inner wall of the spring (4 c) and an annular flange which horizontally extends outwards from the edge of the hemispherical shell and is in butt joint with the top end of the spring (4 c), the top end of the shell cover (2) is provided with a sleeve (2 a) coaxial with the valve core (3), the elastic force adjusting column (4 d 2) is installed in the sleeve (2 a) and is in butt joint with the spring lower pressing sheet (4 d 1), the elastic force adjusting column (4 d 2) is in threaded fit with the sleeve (2 a), and the top end of the elastic force adjusting column (4 d 2) is provided with an operation handle (4 d 3);

the valve closing mechanism (5) comprises a lifting rod (5 a) vertically penetrating through an elastic force adjusting structure (4 d), a fixing plate (4 b), a diaphragm (4 a) and a guide pillar (3 a), a spring (4 c) is sleeved on the lifting rod (5 a), a sliding block (5 a 1) and a stop block (5 a 2) are respectively arranged at the bottom end and the top end of the lifting rod (5 a), a sliding groove (3 a 1) which is in sliding fit with the sliding block (5 a 1) is formed in the guide pillar (3 a), a sliding groove plugging cover (3 a 2) which is in clearance fit with the lifting rod (5 a) and plugs the sliding groove (3 a 1) is arranged at the top end of the guide pillar (3 a), and the stop block (5 a 2) is in butt joint with the top end of an operation handle (4 d 3).

2. The gate valve with a pressure stabilizing structure according to claim 1, wherein: the second cavity (1 c 2) is internally provided with a guide mechanism (1 e), the guide mechanism (1 e) comprises a guide sleeve (1 e 1) and a bracket (1 e 2) fixedly connected with the guide sleeve (1 e 1) and the inner wall of the shell (1), the guide sleeve (1 e 1) is vertically arranged, and the guide sleeve (1 e 1) is in sliding fit with the guide post (3 a).

3. A gate valve with a pressure stabilizing structure according to claim 2, characterized in that: the bottom of the plug (3 c) is provided with a plug guide rod (3 c 1) which extends vertically downwards, the bottom of the shell (1) is provided with a plug guide hole (3 c 2) which is in sliding fit with the plug guide rod (3 c 1), and the outer side of the plug guide rod (3 c 1) is sleeved with a buffer mechanism (3 d) which is fixedly arranged at the bottom end of the inner wall of the shell (1).

4. The gate valve with a pressure stabilizing structure according to claim 1, wherein: the valve closing mechanism (5) further comprises a linear bearing (5 b), a bearing fixing groove (4 b 1) is formed in the fixing plate (4 b), the linear bearing (5 b) is fixedly arranged in the bearing fixing groove (4 b 1), and the linear bearing (5 b) is in sliding fit with the lifting rod (5 a).

5. The gate valve with a pressure stabilizing structure according to claim 1, wherein: the top end of the shell cover (2) and the top end of the operating handle (4 d 3) are provided with opening indication marks.