CN222577375U - Low torque high sealing gate valve - Google Patents

Abstract

The utility model relates to the technical field of gate valves, and discloses that the utility model provides the following technical solutions: a low-torque high-sealing gate valve, comprising a valve body, a sealing assembly, and a valve core assembly, wherein the valve body is fixedly connected to a valve cover by bolts, a valve stem is movably installed inside the valve cover, the sealing assembly comprises a sealing gasket, the sealing gasket is arranged between the valve body and the valve cover, two spring bases are arranged on both sides of the inner wall of the sealing gasket, a supporting spring is arranged on the outer wall of the spring base, a connecting rod is fixedly connected to the outer wall of the supporting spring, a bearing is fixedly connected to the outer wall of the connecting rod, the bearing is movably installed on the outer wall of the valve stem, and the tension spring and the valve core cooperate to achieve the effect of continuously providing a force to the valve core through the elasticity of the tension spring, so that the sealing strips on both sides of the valve core are tightly fitted with the isolation plate inside the valve body, so as to prevent the water flow below from entering the upper part of the valve body and causing leakage, thereby enhancing the sealing performance.

Description

Low-torque high-sealing gate valve

Technical Field

The utility model relates to the technical field of gate valves, in particular to a low-torque high-sealing gate valve.

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 gate valve is sealed by contact between the valve seat and the gate plate, and typically the sealing surface will be clad with a metal material to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. The gate plate has a rigid gate plate and an elastic gate plate, and the gate valve is divided into a rigid gate valve and an elastic gate valve according to the difference of the gate plates. A low torque valve is a specially designed valve with a low torque value, typically used in applications requiring less torque. The valve adopts special sealing materials and structural design, can realize good sealing effect under lower torque, and has higher safety performance and service life.

For example, chinese patent CN218992407U discloses a soft sealing gate valve with low torque force, which is provided with a hand wheel arranged at the end part of the valve rod outside the valve body, two partition plates are arranged on the left inner cavity wall and the right inner cavity wall of the valve body, a guide wheel unit capable of reducing the torque force is arranged in a guide cavity between the two partition plates, and the guide wheel unit is arranged at the side end of the elastic valve clack. The guide wheel unit is provided with the baffle and comprises an installation shaft, a rolling ring, baffle plates, limiting plates and universal balls, rolling friction between the baffle plates and the two baffle plates is realized by the rolling ring, rolling friction between the baffle plates and the inner cavity wall of the valve body is realized by the universal balls, friction between the elastic valve clack and the valve body is further reduced, and finally torque force required by rotation of the valve rod is reduced.

From the above proposed device, it is clear that, although the above device provides a way of reducing the friction between the flap and the valve body, the inventors consider that the following drawbacks remain:

The existing low-torque sealing gate valve is low in torque and small in stress in the normal use process, so that the sealing performance is not high when the valve is closed, the sealing performance is poor due to the fact that the valve is easy to loosen after long-time use, the valve cannot be tightly closed, and the valve core is easy to loosen in the use process, so that water flows into the valve body from the valve core and flows out of the joint of the valve cover and the handle.

Disclosure of utility model

(One) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a low-torque high-sealing gate valve, which has the advantages that the valve body can still keep high sealing performance under the condition of low torque, the valve core is still firmly fixed to prevent water flow leakage during long-time use, and the problems that the sealing performance is poor, the valve cannot be tightly closed due to easy loosening after long-time use because the valve is closed due to low torque and small stress in the normal use process of the existing low-torque sealing gate valve, and the water flow flows from the upper part of the valve core to the valve body and flows from the joint of a valve cover or a handle due to easy loosening of the valve core during the use process are solved.

(II) technical scheme

The low-torque high-sealing gate valve comprises a valve body, a sealing assembly and a valve core assembly, wherein the valve body is fixedly connected with a valve cover through bolts, and a valve rod is movably arranged in the valve cover;

The sealing assembly comprises a sealing gasket, the sealing gasket is arranged between the valve body and the valve cover, two spring bases are arranged on two sides of the inner wall of the sealing gasket, a supporting spring is arranged on the outer wall of each spring base, a connecting rod is fixedly connected to the outer wall of each supporting spring, a bearing is fixedly connected to the outer wall of each connecting rod, and the bearing is movably mounted on the outer wall of the valve rod.

Preferably, two connecting bases are fixedly arranged on two sides of the outer wall of the bearing, a supporting rod is fixedly arranged on the outer wall of the connecting base, a tension spring is fixedly connected with the outer wall of the supporting rod, and the tension spring is sleeved on the outer wall of the spring sleeve column.

Preferably, two connecting flanges are arranged on two sides of the valve body, a handle is fixedly connected above the valve rod, and two isolation plates are arranged on two sides inside the valve body.

Preferably, the valve core assembly comprises a valve core, and the two spring sleeve posts are fixedly arranged on two sides above the valve core.

Preferably, a valve rod is movably arranged in the valve core, a plurality of sealing strips are arranged on the outer walls of the two sides of the valve core, and the sealing strips are attached to the outer walls of the isolation plates in a sealing mode.

Preferably, the outer wall of the lower end of the valve rod is fixedly provided with a connector, the outer wall of the connector is fixedly connected with a valve plate, and the valve plate is arranged in a water through hole formed in the valve core.

Preferably, the outer wall of the valve core is fixedly provided with a limiting seat, the limiting seat is internally and movably provided with a limiting rod, and the limiting rod is fixedly arranged on the outer wall of the valve core.

Preferably, the outer wall of the valve core is provided with a magnetic block, the outer wall of the valve core is provided with a limiting magnetic plate, and the magnetic block and the limiting magnetic plate are mutually attracted.

Preferably, the valve core outer wall is provided with the sealing washer, the sealing washer outer wall is provided with the fixed plate, the fixed plate passes through dead lever fixed mounting in the valve core outer wall, the sealing washer seals the laminating with it when valve plate closed state.

(III) beneficial effects

Compared with the prior art, the utility model provides the low-torque high-sealing gate valve, which has the following beneficial effects:

1. This high sealing gate valve of low moment of torsion is through the cooperation between sealed pad and the supporting spring to reached the holding power that provides through the supporting spring, made sealed pad can firmly laminate between valve gap and valve body, and after long-time use, sealed pad elasticity decline, can keep closely laminating when not overhauling the change at any.

2. According to the low-torque high-sealing gate valve, through the cooperation between the tension spring and the valve core, the purpose that the valve core is continuously provided with acting force through the elasticity of the tension spring is achieved, sealing strips on two sides of the valve core are tightly attached to the isolation plate inside the valve body, leakage caused by water flow below entering the upper portion of the valve body is prevented, and the sealing performance is enhanced.

3. This high sealing gate valve of low moment of torsion adsorbs the magnetic path in the valve plate outside through spacing magnetic plate, and when the valve plate was closed, spacing magnetic plate removed spacing and adsorbed it through magnetism to the valve plate, makes valve plate and sealing washer remain sealed state throughout and prevents that rivers from leaking to whole moment of torsion is little frictional force when opening the valve plate.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the internal structure of the valve body of the present utility model;

FIG. 3 is a schematic view of a seal assembly according to the present utility model;

FIG. 4 is a schematic view of the back side structure of the valve core assembly of the present utility model;

FIG. 5 is a schematic diagram of a front exploded view of the valve core assembly of the present utility model.

The reference numerals in the figures are:

1. Valve body, 11, connecting flange, 12, valve cover, 13, valve rod, 14, handle, 15, isolation plate, 2, sealing component, 21, sealing gasket, 22, spring base, 23, supporting spring, 24, connecting rod, 25, bearing, 26, connecting base, 27, supporting rod, 28, tension spring, 29, spring sleeve column, 3, valve core component, 31, valve core, 32, connector, 33, valve plate, 34, limiting seat, 35, limiting rod, 36, magnetic block, 37, limiting magnetic plate, 38, sealing ring, 39, fixing plate, 310, fixing rod, 311, sealing strip.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, the low torque high sealing gate valve comprises a valve body 1, a sealing assembly 2 and a valve core assembly 3, wherein the valve body 1 is fixedly connected with a valve cover 12 through bolts, a valve rod 13 is movably installed in the valve cover 12, two connecting flanges 11 are arranged on two sides of the valve body 1, a handle 14 is fixedly connected above the valve rod 13, and two isolation plates 15 are arranged on two sides of the interior of the valve body 1.

Referring to fig. 2-3, the sealing assembly 2 includes a sealing gasket 21, the sealing gasket 21 is disposed between the valve body 1 and the valve cover 12, and is used for sealing an inner space of the valve body, preventing medium leakage, two spring bases 22 are disposed on two sides of an inner wall of the sealing gasket 21, a supporting spring 23 is disposed on an outer wall of the spring base 22, the supporting spring 23 can provide a certain elastic force, so that the sealing gasket 21 is tightly attached to surfaces of the valve body and the valve cover 12, sealing effect is improved, a connecting rod 24 is fixedly connected to an outer wall of the supporting spring 23, a bearing 25 is fixedly connected to an outer wall of the connecting rod 24, the bearing 25 is movably mounted on an outer wall of the valve rod 13, two connecting bases 26 are fixedly disposed on two sides of an outer wall of the bearing 25, a supporting rod 27 is fixedly connected to a tension spring 28, the tension spring 28 can provide a certain tension force, so that the bearing always keeps close contact with the valve rod 13, smoothness and sealing performance of the valve are improved, the tension spring 28 is sleeved on an outer wall of the connecting base 26, and the supporting rod 27 is fixedly mounted on an outer wall of the connecting base 26. The support bar 27 may provide additional support force, allowing the bearing to operate more stably, and reducing wear.

Referring to fig. 3-5, the valve core assembly 3 includes a valve core 31, two spring sleeve posts 29 are fixedly mounted on two sides above the valve core 31, a valve rod 13 is movably mounted inside the valve core 31, a plurality of sealing strips 311 are respectively arranged on two side outer walls of the valve core 31, the sealing strips 311 are tightly attached to the outer wall of the isolation plate 15, a connector 32 is fixedly mounted on the outer wall of the lower end of the valve rod 13, a valve plate 33 is fixedly connected with the outer wall of the connector 32, the valve plate 33 is arranged in a water through hole formed in the valve core 31, a limit seat 34 is fixedly mounted on the outer wall of the valve core 31, a limit rod 35 is movably mounted inside the limit seat 34, the limit rod 35 is fixedly mounted on the outer wall of the valve core 31, a magnetic block 36 is arranged on the outer wall of the valve core 31, a limit magnetic plate 37 is arranged on the outer wall of the valve core 31, the magnetic block 36 and the limit magnetic plate 37 are attracted mutually, thereby increasing the stability of the valve operation, preventing the valve core 31 from accidentally moving when being interfered by the outside, a fixing plate 39 is arranged on the outer wall of the valve core 31, the fixing plate 39 is arranged on the outer wall of the sealing strip, the fixing plate 39 is fixedly mounted on the outer wall of the valve core 31, and the sealing rod 38 is tightly attached to the valve plate 33 when in the closed state.

The valve body 1 is firstly installed on a pipeline to be connected through connecting flanges 11 on two sides of the valve body 1, after the valve body 1 is installed, a handle 14 can be used for driving a connecting rod valve rod 13 to rotate, the valve rod 13 drives a valve plate 33 to rotate so as to control opening and closing of the valve, in the process of rotating the valve rod 13, as a bearing 25 is arranged on the outer wall of the valve rod 13, the bearing 25 does not rotate along with the valve rod 13, two connecting rods 24 arranged on the outer wall of the bearing 25 are connected with the outer wall of a sealing gasket 21 through supporting springs 23, so that the sealing gasket is tightly attached to the valve cover 12 and the inside of the valve body 1 at any time, the sealing gasket 21 is prevented from being used for elastically weakening water leakage for a long time, supporting rods 27 are fixed through connecting bases 26 on two sides of the bearing 25, and the supporting rods 27 are connected above the valve core 31 through tension springs 28, so that stability of the bearing 25 can be guaranteed, and downward pressure can be provided for the valve core 31 through the tension springs 28, the sealing strip 311 is tightly attached to the upper surface of the valve core 31, and the whole sealing performance of the valve body 1 is ensured.

Secondly, when the handle 14 is rotated to adjust the opening and closing of the valve plate 33, the valve plate 33 can only be rotated from a single direction to control the opening and closing, when the valve plate 33 is opened, the whole stress is only exerted by the adsorption force of the magnetic block 36 and the limit magnetic plate 37 and the friction force of the sealing ring 38 on the valve plate 33, the whole torque is small, and under the condition of keeping the small torque, the mutual adsorption of the magnetic block 36 and the limit magnetic plate 37 can achieve bidirectional pressure of 25 kg, when the valve is closed, the handle 14 is rotated in the opposite direction, and when the valve plate 33 is closed, the valve plate 33 and the sealing ring 38 are always kept in sealing fit through the limit magnetic plate 37, so that the whole sealing effect of the valve body 1 is achieved.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The low-torque high-sealing gate valve comprises a valve body (1), a sealing assembly (2) and a valve core assembly (3), and is characterized in that the valve body (1) is fixedly connected with a valve cover (12) through bolts, and a valve rod (13) is movably arranged in the valve cover (12);

Seal assembly (2) are including sealed pad (21), sealed pad (21) set up between valve body (1) and valve gap (12), sealed pad (21) inner wall both sides are provided with two spring base (22), spring base (22) outer wall is provided with supporting spring (23), supporting spring (23) outer wall fixedly connected with connecting rod (24), connecting rod (24) outer wall fixedly connected with bearing (25), bearing (25) movable mounting is in valve rod (13) outer wall.

2. The low-torque high-sealing gate valve of claim 1, wherein two connecting bases (26) are fixedly arranged on two sides of the outer wall of the bearing (25), a supporting rod (27) is fixedly arranged on the outer wall of the connecting base (26), a tension spring (28) is fixedly connected with the outer wall of the supporting rod (27), and the tension spring (28) is sleeved on the outer wall of a spring sleeve column (29).

3. The low-torque high-sealing gate valve of claim 1, wherein two connecting flanges (11) are arranged on two sides of the valve body (1), a handle (14) is fixedly connected above the valve rod (13), and two isolation plates (15) are arranged on two sides of the interior of the valve body (1).

4. The low-torque high-sealing gate valve according to claim 2, wherein the valve core assembly (3) comprises a valve core (31), and two spring sleeve posts (29) are fixedly arranged on two sides above the valve core (31).

5. The low-torque high-sealing gate valve of claim 4, wherein a valve rod (13) is movably arranged in the valve core (31), a plurality of sealing strips (311) are arranged on the outer walls of the two sides of the valve core (31), and the sealing strips (311) are in sealing fit with the outer walls of the isolation plates (15).

6. The low-torque high-sealing gate valve of claim 5, wherein a connector (32) is fixedly arranged on the outer wall of the lower end of the valve rod (13), a valve plate (33) is fixedly connected to the outer wall of the connector (32), and the valve plate (33) is arranged in a water through hole formed in the valve core (31).

7. The low-torque high-sealing gate valve of claim 6, wherein a limit seat (34) is fixedly arranged on the outer wall of the valve core (31), a limit rod (35) is movably arranged in the limit seat (34), and the limit rod (35) is fixedly arranged on the outer wall of the valve core (31).

8. The low-torque high-sealing gate valve of claim 7, wherein a magnetic block (36) is arranged on the outer wall of the valve core (31), a limiting magnetic plate (37) is arranged on the outer wall of the valve core (31), and the magnetic block (36) and the limiting magnetic plate (37) are attracted to each other.

9. The low-torque high-sealing gate valve of claim 8, wherein a sealing ring (38) is arranged on the outer wall of the valve core (31), a fixing plate (39) is arranged on the outer wall of the sealing ring (38), the fixing plate (39) is fixedly arranged on the outer wall of the valve core (31) through a fixing rod (310), and the sealing ring (38) is in sealing fit with the valve plate (33) in a closed state.