Air bag sealing type hydraulic valve

Abstract

The utility model discloses an air bag sealing type hydraulic valve, which belongs to the technical field of hydraulic valves, and comprises a spherical valve body, an air bag rubber tube arranged in the spherical valve body and a flange plate arranged at the end part of the spherical valve body, an opening of the spherical valve body extends to form a fixed edge, the fixed edge is sunken to form a sunken part, and an extrusion part is convexly arranged on the end surface of the flange plate. Part of the air bag rubber pipe is extruded between the extrusion part and the concave part, a pressing ring is arranged in the center of the flange plate in a protruding mode, part of the air bag rubber pipe is extruded between the pressing ring and the spherical valve body, and an inflation cavity is formed between the air bag rubber pipe and the spherical valve body. According to the air bag sealing type hydraulic valve, part of wall bodies at the two ends of the air bag rubber pipe are squeezed between the spherical valve bodies through the pressing rings, the contact area between the air bag rubber pipe and the spherical valve bodies and the contact area between the air bag rubber pipe and the flange plates are increased, and meanwhile the portions, corresponding to the pressing rings, of the air bag rubber pipe cannot deform inwards under the blocking effect of the pressing rings; the space of the inflation cavity is reduced, and the response is more timely.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic valve technical field, especially, relate to a gasbag sealed type hydraulic valve. BACKGROUND

[0002] As the key automation control element in hydraulic system, hydraulic valve is mainly controlled by pressure oil, and is usually combined with electromagnetic pressure regulating valve for use, and can be used for controlling the on-off of oil and water pipeline system of hydropower station at long distance, and is widely applied in many fields such as construction machinery, mining machinery, hydraulic lift, packaging machine, coking plant coal mine, injection molding machine, bending stamping equipment, foundry, packing machine, steel plant, numerical control machine tool and agricultural machinery. Hydraulic valve is usually composed of valve body, valve core and control device, and the valve body contains passages and channels inside, and the opening and closing state of passages and channels can be changed by controlling the movement of valve core, so as to control the flow of liquid.

[0003] The gasbag hydraulic valve is a new type of hydraulic valve in the current market, please refer to Figure 1 As shown in the figure, it comprises a valve body 1 and a rubber sleeve 2, the rubber sleeve 2 is fixedly installed in the valve body 1, the rubber sleeve 2 is made of rubber material, there is a sealed cavity 11 between the valve body 1 and the rubber sleeve 2, the valve body 1 is provided with an air inlet 12 in communication with the sealed cavity 11, and the internal space of the rubber sleeve 2 forms a flow channel 21 for medium passing. When no gas is filled into the sealed cavity 11, the flow channel 21 is in an open state, and the medium can pass through; when gas is injected into the sealed cavity 11 through the air inlet 12, the pressure in the sealed cavity 11 increases, which will force the rubber sleeve 2 to deform, so that the inner wall of the rubber sleeve 2 is tightly fitted together, and then the medium is cut off.

[0004] In the prior art, the rubber sleeve 2 is pressed and fixed by the gland 3 at both ends, and when the pressure in the sealed cavity 11 is too large, the end portion of the rubber sleeve 2 pressed between the gland 3 and the valve body 1 is easy to be pulled out or loose, and then leakage occurs, thereby affecting normal use. In addition, the entire inner wall of the rubber sleeve 2 needs to be deformed under the pressure of the gas before the medium can be cut off, at this time, in order to ensure the sealing reliability, enough gas needs to be filled into the sealed cavity 11, the response speed is slow, and it is not conducive to fast closing of the valve. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is that in the prior art, the rubber sleeve is easy to be pulled out or leak under the action of gas pressure, and the corresponding speed is slow, based on this, the utility model provides a gasbag sealed type hydraulic valve which is sealed reliably and has fast corresponding speed.

[0006] The utility model discloses a technical scheme that solves its technical problem is adopted: a kind of air bag sealing type hydraulic valve, including the spherical valve body with the opening of two ends, the air bag rubber pipe being located in the spherical valve body and the flange plate being located at the end of the spherical valve body, the opening of the spherical valve body extends outward and forms fixed rim connected with the flange plate, the fixed rim is recessed along the axial direction and forms annular recess, the end face of the flange plate is protruded with extrusion part, the extrusion part is matched and located in the recess, part of the air bag rubber pipe is extruded between the extrusion part and the recess, the center of the flange plate is protruded with compression ring, part of the air bag rubber pipe is extruded between the compression ring and the spherical valve body, inflatable cavity is formed between the air bag rubber pipe and the spherical valve body, and the spherical valve body is provided with inflatable port communicated with the inflatable cavity.

[0007] Further, the spherical valve body includes a spherical segment and straight cylinder segments located on opposite sides of the spherical segment, the fixed rim is fixedly connected with the straight cylinder segments, the air bag rubber pipe includes a rubber pipe body located in the spherical valve body and a clamping portion connected to an end of the rubber pipe body, the inflatable cavity is formed by a space between the rubber pipe body and the spherical segment, and the clamping portion is clamped between the fixed rim and the flange plate.

[0008] Further, the connection between the spherical segment and the straight cylinder segments is smoothly connected with a necked segment, the compression ring is oppositely arranged with the straight cylinder segment, part of the rubber pipe body is extruded between the compression ring and the straight cylinder segment, and part of the rubber pipe body is extruded between the compression ring and the necked segment.

[0009] Further, the end face of one end of the compression ring close to the necked segment is provided as an arc surface structure.

[0010] Further, the fixed rim is fixedly connected with the flange plate on a side of the recess away from the central axis of the spherical valve body.

[0011] Further, the fixed rim and the flange plate are connected through mutually matched bolts and nuts, one end of the bolt passes through the flange plate and the fixed rim in sequence, the nut is threadedly connected to the end of the bolt, an annular groove is formed on the end face of the flange plate away from the fixed rim, and the head of the bolt is accommodated in the annular groove.

[0012] Further, a sealing groove is formed on the end face of the flange plate away from the fixed rim, and a sealing element is installed in the sealing groove.

[0013] Further, the outer diameter of the flange plate is larger than the outer diameter of the fixed rim, and a mounting hole is formed at the edge of the flange plate.

[0014] The airbag-sealed hydraulic valve of this utility model has the following advantages:

[0015] 1. The portion of the airbag hose located between the fixed edge and the flange is squeezed into the recessed part under the action of the extrusion part, which increases the contact area between the airbag hose and the fixed edge and flange, thereby improving the sealing performance and preventing leakage.

[0016] 2. Because the end part of the airbag hose is squeezed into the recess by the extrusion part, the part of the airbag hose between the fixed edge and the flange is in an up-and-down state. This increases the difficulty of the airbag hose detaching from the fixed edge and the flange under gas pressure, thus ensuring installation stability.

[0017] 3. The pressure ring squeezes part of the wall at both ends of the air bladder hose between the ball valve body. On the one hand, this increases the contact area between the air bladder hose, the ball valve body, and the flange, resulting in a good sealing effect. On the other hand, it also prevents the part of the air bladder hose corresponding to the pressure ring from deforming inward due to the blocking effect of the pressure ring. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of an airbag-sealed hydraulic valve in the prior art;

[0020] Figure 2 This is a schematic diagram of the structure of the airbag-sealed hydraulic valve of this utility model (valve open state);

[0021] Figure 3 yes Figure 2 A magnified view of point A in the airbag-sealed hydraulic valve shown.

[0022] Figure 4 yes Figure 2 The diagram shows another state of the airbag-sealed hydraulic valve (valve closed state).

[0023] In the diagram: 1. Valve body, 2. Rubber sleeve, 11. Sealing cavity, 12. Air inlet, 21. Flow channel, 10. Spherical valve body, 101. Opening, 102. Fixed edge, 103. Recessed part, 104. Spherical section, 105. Straight section, 106. Neck, 20. Flange, 201. Extrusion part, 202. Pressure ring, 203. Annular groove, 204. Sealing groove, 205. Seal, 206. Mounting hole, 30. Airbag hose, 301. Inflation cavity, 302. Hose body, 303. Clamping part, 304. Inflation port, 40. Bolt, 50. Nut. Detailed Implementation

[0024] The utility model will be explained in detail in combination with the drawings. The drawing is a simplified schematic diagram, and only the basic structure of the utility model is schematically shown, so it only shows the structure related to the utility model.

[0025] Please refer to Figures 2-4 The utility model provides a kind of air bag sealing type hydraulic valve, including spherical valve body 10, flange plate 20 and air bag rubber tube 30, air bag rubber tube 30 is made of rubber material, spherical valve body 10 has two oppositely arranged openings 101, spherical valve body 10 is located at the opening 101 and extends outward to form fixed rim 102, flange plate 20 has two and is fixedly installed on fixed rim 102, air bag rubber tube 30 is installed in spherical valve body 10, and the both ends of air bag rubber tube 30 are clamped between fixed rim 102 and flange plate 20, fixed rim 102 is recessed along the axial direction and forms annular recess 103, flange plate 20 is provided with extrusion part 201 on the end face facing fixed rim 102, extrusion part 201 is matched in recess 103, part of air bag rubber tube 30 is extruded between extrusion part 201 and recess 103, the center of flange plate 20 is provided with pressing ring 202 along the axial direction, part of air bag rubber tube 30 is extruded between pressing ring 202 and spherical valve body 10, air bag rubber tube 30 and spherical valve body 10 form inflation cavity 301, spherical valve body 10 is provided with inflation port 304 that communicates with inflation cavity 301.

[0026] The air bag sealing type hydraulic valve of the utility model can control the opening and closing of air bag rubber tube 30, and the specific process is as follows: Figure 2 When no gas is filled into inflation cavity 301, the inside of air bag rubber tube 30 is in normal state, at this time, medium can flow from the inside of air bag rubber tube 30 to realize normal medium circulation. Figure 4 When gas is filled into inflation cavity 301 through inflation port 304, air bag rubber tube 30 deforms inward and necks under the action of gas pressure, finally the inner wall of air bag rubber tube 30 is tightly attached together, so as to close the inner cavity of air bag rubber tube 30, and realize the closing valve function.

[0027] During assembly, the part of air bag rubber tube 30 between fixed rim 102 and flange plate 20 is extruded into recess 103 under the action of extrusion part 201, which increases the contact area between air bag rubber tube 30 and fixed rim 102 and flange plate 20, and further improves the sealing performance to avoid leakage.

[0028] At the same time, since the end part of air bag rubber tube 30 is extruded into recess 103 by extrusion part 201, the part of air bag rubber tube 30 between fixed rim 102 and flange plate 20 is in up-and-down state, so that the difficulty of air bag rubber tube 30 being separated from fixed rim 102 and flange plate 20 under the action of gas pressure is increased, and the installation stability is ensured.

[0029] In addition, the compression ring 202 extrudes the partial wall of the air bag rubber tube 30 at both ends between the spherical valve body 10, on the one hand, increases the contact area between the air bag rubber tube 30 and the spherical valve body 10 and the flange plate 20, and has good sealing effect, on the other hand, also makes the part of the air bag rubber tube 30 corresponding to the compression ring 202 not deformed inward due to the blocking effect of the compression ring 202, that is, the part of the air bag rubber tube 30 between the two compression rings 202 is deformed inward under pressure, thereby closing the inner cavity of the air bag rubber tube 30, so that the space of the inflation cavity 301 is reduced, and when the gas is filled inward, the deformation speed of the air bag rubber tube 30 is faster, which is beneficial to quickly close the valve, thereby increasing the sensitivity of the valve.

[0030] In the embodiment, the spherical valve body 10 includes a spherical segment 104 and straight cylinder segments 105 located at opposite sides of the spherical segment 104, the inflation port 304 is arranged on the spherical segment 104, the straight cylinder segments 105 are through at both ends, the opening 101 is formed by the ports of the straight cylinder segments 105, the fixed rim 102 is fixedly connected with the straight cylinder segments 105 along the radial direction of the straight cylinder segments 105, and the air bag rubber tube 30 includes a rubber tube body 302 and a clamping part 303 connected to the end of the rubber tube body 302, wherein the rubber tube body 302 is located in the spherical valve body 10, the inflation cavity 301 is formed by the space between the rubber tube body 302 and the spherical segment 104, and the clamping part 303 is clamped between the fixed rim 102 and the flange plate 20.

[0031] Further, the connection between the spherical segment 104 and the straight cylinder segment 105 is smoothly connected with a necked segment 106, the compression ring 202 is arranged opposite to the straight cylinder segment 105, part of the rubber tube body 302 is extruded between the compression ring 202 and the straight cylinder segment 105, at the same time, part of the rubber tube body 302 is extruded between the compression ring 202 and the necked segment 106, in this way, the extrusion and fixation of the flange plate 20 on the air bag rubber tube 30 is increased, and the situation that the end of the air bag rubber tube 30 is separated from the flange plate 20 due to the gas pressure is further prevented. In addition, the end face of the end of the compression ring 202 close to the necked segment 106 is arranged as an arc surface structure to reduce the abrasion of the air bag rubber tube 30 caused by the bottom of the compression ring 202.

[0032] In the embodiment, the fixed edge 102 is fixedly connected with the flange plate 20 on the side of the recess 103 away from the central axis of the spherical valve body 10. The fixed edge 102 and the flange plate 20 are connected through the mutually matched bolts 40 and nuts 50. During installation, one end of the bolt 40 passes through the flange plate 20 and the fixed edge 102 in sequence, and the nut 50 is threadedly connected at the end of the bolt 40. In a specific implementation, an annular groove 203 is formed on the end face of the flange plate 20 away from the fixed edge 102, and a through hole for the bolt 40 to pass through is formed on the groove bottom wall of the annular groove 203. After the bolt 40 is installed in place, the head of the bolt 40 is completely accommodated in the annular groove 203, so that the head of the bolt 40 does not protrude to the surface of the flange plate 20. The purpose of this is that the end face of the flange plate 20 away from the fixed edge 102 is used to be sealingly connected with other components (for example, a pipeline connected with the hydraulic valve), so as to avoid that the bolt 40 affects the connection between the flange plate 20 and other components.

[0033] Further, an annular sealing groove 204 is also formed on the end face of the flange plate 20 away from the fixed edge 102, and a sealing element 205 is installed in the sealing groove 204. The sealing element 205 is made of silica gel or rubber material. When the flange plate 20 is connected with the flange end face of other components, the sealing element 205 is pressed on the two abutting surfaces, so as to realize sealing. In addition, the outer diameter of the flange plate 20 is greater than that of the fixed edge 102, and a mounting hole 206 is formed at the edge of the flange plate 20. The mounting hole 206 is used to install a fastening bolt, and the flange plate 20 is fixedly connected with other components through the fastening bolt, so as to connect the air bag sealing type hydraulic valve of the utility model into the medium conveying system, for example, into the conveying system composed of a hydraulic valve and a pipeline.

[0034] Based on the above ideal embodiments according to the utility model, through the above description, relevant personnel can make various changes and modifications without deviating from the scope of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A bag seal type hydraulic valve comprising a spherical valve body having openings at both ends, a bag hose provided in the spherical valve body, and a flange plate provided at the end of the spherical valve body, characterized in that: The opening of the spherical valve body extends outward to form a fixed rim connected with the flange plate, the fixed rim is recessed along the axial direction to form an annular recess, an extrusion part is protruded on the end face of the flange plate, the extrusion part is matched with the recess, part of the air bag rubber tube is extruded between the extrusion part and the recess, a compression ring is protruded at the center of the flange plate, part of the air bag rubber tube is extruded between the compression ring and the spherical valve body, the air bag rubber tube and the spherical valve body form an inflation cavity, and the spherical valve body is provided with an inflation port communicated with the inflation cavity.

2. The bladder sealed hydraulic valve of claim 1, wherein: The spherical valve body comprises a spherical segment and straight cylinder segments located at opposite sides of the spherical segment, the fixed rim is fixedly connected with the straight cylinder segments, the air bag rubber tube comprises a rubber tube body located in the spherical valve body and a clamping part connected with the end of the rubber tube body, the inflation cavity is formed by the space between the rubber tube body and the spherical segment, and the clamping part is clamped between the fixed rim and the flange plate.

3. The bladder sealed hydraulic valve of claim 2, wherein: The connecting part of the spherical segment and the straight cylinder segment is smoothly connected with a necked segment, the compression ring is oppositely arranged with the straight cylinder segment, part of the rubber tube body is extruded between the compression ring and the straight cylinder segment, and part of the rubber tube body is extruded between the compression ring and the necked segment.

4. The bladder sealed hydraulic valve of claim 3, wherein: The end face of one end of the compression ring close to the necked segment is provided as an arc face structure.

5. The bladder sealed hydraulic valve of claim 1, wherein: The fixed rim is fixedly connected with the flange plate on the side of the recess away from the central axis of the spherical valve body.

6. The bladder sealed hydraulic valve of claim 5, wherein: The fixed rim and the flange plate are connected through mutually matched bolts and nuts, one end of the bolt passes through the flange plate and the fixed rim in sequence, the nut is threadedly connected with the end of the bolt, an annular groove is formed on the end face of the flange plate away from the fixed rim, and the head of the bolt is accommodated in the annular groove.

7. The bladder sealed hydraulic valve of claim 6, wherein: A sealing groove is formed on the end face of the flange plate away from the fixed rim, and a sealing element is mounted in the sealing groove.

8. The bladder sealed hydraulic valve of claim 1, wherein: The outer diameter of the flange plate is larger than that of the fixed rim, and a mounting hole is formed at the edge of the flange plate.

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