CN115013560A - Distribution valve - Google Patents

Abstract

The invention relates to the technical field of valve bodies, in particular to a distribution valve which comprises two groups of valve bodies and a valve core, wherein the valve core is cylindrical, a shaft hole matched with the shape of the valve core and matched with the valve core in a dynamic sealing manner is arranged on the valve body, a feeding channel is arranged at the upper part of the valve body, a material cylinder channel and a discharging channel which are oppositely arranged are arranged at two sides of the valve body, and the inner ends of the feeding channel, the material cylinder channel and the discharging channel are communicated with the shaft hole; the outer side cambered surface of the valve core is provided with a cutting groove, when the cutting groove rotates to a corresponding angle, the cutting groove is respectively communicated with the feeding channel and the material cylinder channel, the feeding channel and the discharging channel, and the material cylinder channel and the discharging channel, and the corresponding discharging channel, the material cylinder channel and the feeding channel are sealed by the outer side cambered surface of the valve core opposite to the cutting groove; the invention can bear large sealing pressure, which is beneficial to improving the conveying height; the cleaning is easy after the fault occurs; the pressure loss during conveying concrete is reduced; the slump constant of the concrete is low, and the concrete pump can be suitable for pumping concrete with various performances.

Description

Distribution valve

Technical Field

The invention relates to the technical field of valve bodies, in particular to a distribution valve.

Background

The pumping system is the core mechanism of concrete pump, pump truck and pump machine, and is a machine for continuously conveying concrete along pipeline by using pressure. The key technology of the pumping system is a distribution valve system which determines the continuity of the conveying work, concrete enters the piston cylinder by alternately opening or closing the feeding hole and the discharging hole of the piston cylinder, and then the concrete is extruded into the conveying pipe by the piston and is continuously pumped out.

The common distribution valve comprises a gate valve and an S valve, the gate valve generally comprises a gate chamber, two oil cylinders and two gate plates which are slidably mounted in the gate chamber, and the gate valve is driven by the oil cylinders to make linear motion on a circular guide rail movable rod in the gate chamber so as to finish the action of alternately opening or closing the feed port and the discharge port of the concrete. Because the front edge of flashboard is very thin, the resistance of inserting the concrete is little, and moving part quality is light, inertia is little, so the actuating cylinder load is light, can use low pressure system and minor diameter hydro-cylinder, is favorable to reduce cost, but the gate valve is sealed to receive its slidable mounting structure restriction, and sealing pressure is lower, and is specific: the sealing on the circular guide rail movable rod is local sealing, and grout can get into the guide rail from the unsealed part under the effect of pressure, and pressure is big more then the speed and the volume that get into the guide rail just big more, and this will lead to the flashboard wearing and tearing, and the flashboard leads to losing sealing performance because the unable compensation in clearance with the lock chamber, and flashboard life reduces, consequently is not fit for the high pressure and carries, carries highly little.

The valve body of the S valve is in an S letter shape, when the S valve is installed and used, the assembly position of the S valve is arranged at the bottom of the hopper, and stirring blades are arranged on two sides of the upper portion of the S valve. One end of a discharge port of the concrete pump is fixed and is communicated with an outlet of a delivery pipe of the concrete pump, the other end of the discharge port is arranged in a hopper and swings to and fro under the action of piston rods of two hydraulic cylinders and is respectively communicated with two piston cylinders A, B, when an S valve is communicated with a piston cylinder B, the piston cylinder B pumps concrete to the outlet of the delivery pipe, and at the moment, the piston cylinder A sucks the concrete; and when the S valve is communicated with the piston cylinder A, the piston cylinder A presses and conveys concrete, and the piston cylinder B sucks the concrete, so that the processes of material suction and material discharge are realized. The S valve is a part of the conveying pipe, the cross section of the flow channel is unchanged, the swinging pipe opening is provided with the wear-resisting plate of the wear-resisting ring, and the wear-resisting plate is convenient to maintain and condition after being worn. However, the S valve is arranged at the bottom of the hopper, is in a large arc shape when swinging, and is in large-area contact with concrete, and is particularly labor-consuming and labor-consuming in the process of pushing the concrete to butt the pipe orifice; when the concrete passes through the S pipe, the friction force of the concrete on each part of the inner wall is uneven, so that the inner wall of the S pipe is abraded unevenly, and the service life of a wearing part is reduced finally. In addition, the requirement of S valve to concrete aggregate is higher, and when big slump concrete gets into people' S hopper, causes the stone very easily and sinks in the hopper bottom, and the grout come-up will cause: (1) the piston material cylinder sucks in uneven concrete, and pipe blockage is easy to occur after the concrete is extruded out; (2) the stone gathers the bottom of collecting hopper, causes S valve swing resistance increase, blocks even the S valve, makes the S valve unable work. Furthermore, the position of the swinging nozzle is usually switched instantaneously, so that the concrete in the piston cylinder is filled, the swinging nozzle is quickly swung, when the concrete in the hopper is low-slump concrete, the concrete cannot rapidly enter the quickly swung swinging nozzle, a vacuum area is formed around the orifice of the piston cylinder, as a result, the conveying of the concrete in the piston cylinder and the S valve is interrupted, the liquid concrete is easily separated into cement mortar and aggregate, and concrete arching occurs on the upper surface of the orifice of the piston cylinder, and the arched concrete cannot enter the cylinder.

It can be seen that there are problems with the dispensing valve in existing concrete pumping systems.

Disclosure of Invention

The invention aims to provide a distribution valve which has the characteristics of quick flow channel switching, high sealing pressure, contribution to uniform concrete suction of a piston cylinder, pressure-resistant conveying and suitability for various concrete materials.

In order to realize the purpose, the following technical scheme is provided:

a distribution valve comprises two groups of valve bodies and valve cores, wherein each valve core is cylindrical, a shaft hole matched with the shape of each valve core and matched with each valve core in a dynamic sealing mode is formed in each valve body, a feeding channel is formed in the upper portion of each valve body, a material cylinder channel and a discharging channel are oppositely arranged on the two sides of each valve body, and the inner ends of the feeding channel, the material cylinder channel and the discharging channel are communicated with the shaft holes; the cambered surface of the outer side of the valve core is provided with a cutting groove, the feeding channel, the material cylinder channel and the discharging channel are all rectangular channels, and the cutting line of the cutting groove is a rectangle parallel to the axis of the valve core; when the cutting groove rotates to a corresponding angle, the cutting groove is respectively communicated with the feeding channel and the material cylinder channel, the feeding channel and the discharging channel, the material cylinder channel and the feeding channel which correspond to the cutting groove in a closed mode are arranged on the outer arc surface of the valve core opposite to the cutting groove.

Further, the radial section of the cutting groove is preferably arc-shaped.

Furthermore, wear-resisting rings are arranged in the feeding channel and the material cylinder channel, the bottom of each wear-resisting ring is an arc surface matched with the outer side of the valve core, and the arc surfaces and the outer side arc surface of the valve core do shearing motion when the valve core rotates.

Furthermore, the upper part of the wear-resistant ring is also connected with an elastic buffer ring and a sealing cover; the feed channel and the material cylinder channel are provided with counter bores for mounting sealing covers on the outer sides of the valve bodies, and the middle parts of the sealing covers are provided with through holes communicated with the elastic buffering rings and the wear-resisting rings.

Furthermore, the feeding channel, the material cylinder channel and the discharging channel are all rectangular channels, and the intersecting line of the intersecting groove is a rectangle parallel to the axis of the valve core.

Furthermore, the valve core is axially provided with a limiting bearing platform at the outer end, the valve body is provided with a limiting plate at the side, the limiting plate is provided with a rotating hole, and the limiting bearing platform extends out of the rotating hole and is rotatably connected with the driving mechanism.

Further, the two groups of valve bodies are integrally connected or split.

Furthermore, the two groups of valve bodies are connected as a whole, the shaft holes in the two groups of valve bodies are coaxial and communicated, the valve cores in the two groups of valve bodies are connected through a connector, the inner end of one valve core is axially provided with a rotating hole, one end of the connector is annularly provided with a sealing groove, a rotating support structure is arranged in the sealing groove, and the other end of the connector is fixedly connected with the inner end of the other valve core.

The use and working principle of the invention are as follows: the concrete hopper is positioned at the upper part of the distribution valve, the piston cylinder is communicated with the material cylinder channel, concrete mixture is poured into the hopper for stirring, the valve core rotates under the drive of the driving mechanism, the cut groove on the valve core is communicated with the feeding channel and the material cylinder channel on the distribution valve, the concrete enters the distribution valve from the feeding channel, the piston cylinder sucks in concrete under the drive of the hydraulic oil cylinder, then the driving mechanism drives the valve core to rotate, the cut groove is communicated with the material cylinder channel and the discharging channel on the distribution valve, and the piston cylinder conveys the concrete mixture outwards through the conveying pipe along a linear channel formed by the material cylinder channel and the discharging channel under the drive of the hydraulic oil cylinder.

When two groups of valve bodies and valve cores are used as distribution valves of a pumping system at the same time, the effect of continuous discharging can be achieved, specifically, a cutting groove in the valve core in the first distribution valve is communicated with a first feeding channel and a first material cylinder channel on the distribution valve, concrete enters the first distribution valve from the first feeding channel, a first piston cylinder sucks in concrete under the driving of a first hydraulic oil cylinder, then a driving mechanism drives the valve core of the first distribution valve to be communicated with the first material cylinder channel and the first discharging channel, and the first piston cylinder drives the concrete mixing material to be conveyed outwards through a conveying pipe along a straight line channel formed by the material cylinder channel and the discharging channel under the driving of the hydraulic oil cylinder. Meanwhile, the valve core in the second distribution valve is communicated with a second feeding channel and a second material cylinder channel on the second distribution valve, and the concrete mixing material is sucked by the second piston cylinder. And then the driving mechanism drives the valve core of the second distribution valve to be communicated with the second material cylinder channel and the second discharge channel, the second piston cylinder is driven by the second hydraulic oil cylinder to convey the concrete mixture outwards through a second conveying pipe along a linear channel formed by the second material cylinder channel and the second discharge channel, meanwhile, the cutting groove in the valve core of the first distribution valve is communicated with the first feeding channel and the first material cylinder channel on the distribution valve, and the first piston cylinder sucks in the concrete. The process of continuous and uninterrupted material suction and discharge is realized by reciprocating in the way.

The valve core has small diameter and small arc contact surface, so the valve core has small area contacting with concrete and small resistance, thereby achieving the purpose of runner conversion without labor and power consumption and better and quickly.

Because the valve core can adopt the dynamic seal connection in the shaft hole of the distribution valve, the wearing parts which bear the bearing and the sealing action are convenient to replace, and can bear higher sealing pressure, the high-pressure conveying can be realized, and simultaneously, because the material cylinder channel and the discharge channel are in a straight line, the pressure loss is less and the conveying height is large in the conveying process. In addition, the valve core is cylindrical, and in the process of switching and communicating the feeding channel and the material cylinder channel, the feeding channel and the discharging channel and the material cylinder channel and the discharging channel through the cutting grooves on the side surface of the valve core, the requirement on concrete materials is low, the valve core can be quickly switched to cope with concrete mixtures with different slump, and the situations that the concrete mixtures are interrupted in conveying and liquid concrete is isolated are avoided.

The beneficial technical effects of the invention are as follows: 1. the concrete is uniformly sucked into the piston cylinder by matching with the hopper, and the valve body can bear large sealing pressure, so that pressure-resistant conveying is favorably realized, and the conveying height is improved; 2. the material cylinder channel and the discharge channel are in a straight line, so that the pressure loss during concrete conveying is reduced, and the conveying height is further improved; the piston cylinder barrel is easy to clean after a fault occurs, and particularly the piston cylinder barrel for sucking materials is cleaned; 3. the switching channel is fast, and continuous and uninterrupted material suction and discharge can be realized; 4. the diameter of the valve core is small, and the arc-shaped contact surface is small, so that the area of the valve core contacting concrete is small, and the resistance is small, so that the aims of saving labor and power and better achieving the purpose of quickly switching the flow channel are fulfilled; 5. the concrete material is prevented from being interrupted and the concrete is prevented from being segregated in the conveying process, and the concrete pump is suitable for pumping concrete with various performances.

Drawings

FIG. 1 is a schematic view of the overall construction of the dispensing valve of the present invention;

FIG. 2 is a schematic sectional view of FIG. 1;

FIG. 3 is a schematic illustration of an exploded structure of FIG. 1;

FIG. 4 is a schematic view of another overall construction of the dispensing valve of the present invention;

FIG. 5 is a schematic illustration of an exploded structure of FIG. 4;

FIG. 6 is a schematic view of the exploded structure of FIG. 4 from another angle;

FIG. 7 is a schematic view of the connection of a pumping system using the dispensing valve of the present invention;

FIG. 8 is a schematic view of a seal cap according to the present invention;

FIG. 9 is a schematic structural view of an elastic buffer ring according to the present invention;

FIG. 10 is a schematic view of a wear ring of the present invention;

fig. 11 is a schematic structural diagram of the valve core of the present invention.

In the figure: 1. a valve body; 2. a valve core; 3. a shaft hole; 4. a feed channel; 401. a first feed channel; 402. a second feed channel; 5. a material cylinder channel; 501. a first material cylinder channel; 502. a second vat channel; 6. a discharge channel; 601. a first discharge channel; 602. a second discharge channel; 7. cutting grooves; 8. a wear ring; 9. an elastic buffer ring; 10. a sealing cover; 11. a linker; 12. a first piston cylinder; 13. a second piston cylinder; 14. a first hydraulic cylinder; 15. a second hydraulic cylinder; 16. a first delivery pipe; 17. a second delivery pipe; 18. a limiting bearing platform; 19. a limiting plate; 20. and (4) a hopper.

Detailed Description

A dispensing valve according to the present invention is further described with reference to the accompanying drawings and the following detailed description. It should be noted that the cylindrical valve core 2 mainly refers to a cylinder which corresponds to each channel position and has a circular radial cross section, and includes a dumbbell-shaped cylinder or a cylinder formed by two cylinders.

As shown in fig. 1, 2, 3, 4, 5, 6 and 7, the distribution valve comprises two groups of valve bodies 1 and valve cores 2, wherein the valve cores 2 are cylindrical, shaft holes 3 which are matched with the valve cores 2 in shape and are in dynamic sealing fit with the valve cores 2 are arranged on the valve bodies 1, a feeding channel 4 is arranged at the upper part of the valve body 1, a material cylinder channel 5 and a discharging channel 6 which are oppositely arranged are arranged at two sides of the valve body 1, and the inner ends of the feeding channel 4, the material cylinder channel 5 and the discharging channel 6 are communicated with the shaft holes 3; a cutting groove 7 is formed in the cambered surface of the outer side of the valve core 2, the feeding channel 4, the material cylinder channel 5 and the discharging channel 6 are all rectangular channels, and the cutting line of the cutting groove 7 is a rectangle parallel to the axis of the valve core 2; when the cutting groove 7 rotates to a corresponding angle, the feeding channel 4 and the material cylinder channel 5, the feeding channel 4 and the discharging channel 6, and the material cylinder channel 5 and the discharging channel 6 are respectively communicated, and meanwhile, the discharging channel 6, the material cylinder channel 5 and the feeding channel 4 which correspond to the cutting groove 7 and are sealed by the cambered surface on the outer side of the valve core 2 are closed.

In the using process, the concrete hopper 20 is positioned at the upper part of the distribution valve, the piston cylinder is communicated with the material cylinder channel 5, concrete mixture is poured into the hopper 20 for stirring, the valve core 2 rotates under the drive of the driving mechanism, the cutting groove 7 on the valve core 2 is communicated with the feeding channel 4 and the material cylinder channel 5 on the distribution valve, the concrete enters the distribution valve from the feeding channel 4, the piston cylinder sucks concrete under the drive of the hydraulic oil cylinder, then the driving mechanism drives the valve core 2 to rotate, the cutting groove 7 is communicated with the material cylinder channel 5 and the material discharge channel 6 on the distribution valve, and the piston cylinder conveys the concrete mixture outwards along a linear channel formed by the material cylinder channel 5 and the material discharge channel 6 under the drive of the hydraulic oil cylinder.

When two groups of valve bodies 1 and valve cores 2 are used as distribution valves of a pumping system at the same time, the effect of continuous discharging can be achieved, specifically, a cutting groove 7 on the valve core 2 in the first distribution valve is communicated with a first feeding channel 401 and a first material cylinder channel 501 on the distribution valve, concrete enters the first distribution valve from the first feeding channel 401, a first piston cylinder 12 sucks in the concrete under the driving of a first hydraulic oil cylinder 14, then a driving mechanism drives the valve core 2 of the first distribution valve to be communicated with the first material cylinder channel 501 and the first discharging channel 601, and the first piston cylinder 12 conveys the concrete mixing material outwards along a linear channel formed by the first material cylinder channel 501 and the first discharging channel 601 through a first conveying pipe 16 under the driving of the hydraulic oil cylinder. At the same time, the valve core 2 of the second distributing valve is communicated with the second feeding passage 402 and the second material cylinder passage 502, and the concrete mixture is sucked by the second piston cylinder 13. Then the valve core 2 of the second distribution valve is driven by the driving mechanism to be communicated with the second material cylinder channel 502 and the second discharging channel 602, the second piston cylinder 13 is driven by the second hydraulic oil cylinder 15 to convey the concrete mixing material outwards along a straight channel formed by the second material cylinder channel 502 and the second discharging channel 602 through the second conveying pipe 17, meanwhile, the cutting groove 7 on the valve core 2 of the first distribution valve is communicated with the first feeding channel 401 and the first material cylinder channel 501 on the distribution valve, and the first piston cylinder 12 sucks in the concrete. The process of continuous and uninterrupted material suction and discharge is realized by reciprocating in the way.

The diameter of the valve core 2 is small, and the arc contact surface is small, so that the area of the valve core 2 contacting concrete in the valve body 1 is small, and the resistance is small, thereby saving labor and power and better achieving the purpose of quickly converting a flow channel.

Because the valve core 2 can adopt the dynamic seal connection in the shaft hole 3 of the distribution valve, wearing parts bearing the bearing and the sealing action, such as a supporting friction belt and a sealing ring, are convenient to replace and can bear higher sealing pressure, high-pressure conveying can be realized, and meanwhile, because the material cylinder channel 5 and the discharge channel 6 are in a straight line, the pressure loss is less and the conveying height is large in the conveying process. In addition, the valve core 2 is cylindrical, and in the process of switching and communicating the feeding channel 4 with the material cylinder channel 5, the feeding channel 4 with the discharging channel 6 and the material cylinder channel 5 with the discharging channel 6 through the cutting groove 7 on the side surface of the valve core 2, the requirement on concrete materials is low, the quick switching can be realized by responding to concrete mixtures with different slump degrees, and the situations that the concrete mixtures are interrupted in the conveying process and liquid concrete is isolated are avoided.

The two groups of valve bodies 1 are connected as a whole, the shaft holes 3 in the two groups of valve bodies 1 are coaxial and communicated, wherein the valve cores 2 in the two groups of valve bodies 1 are connected through a connector 11, the inner end of one valve core 2 is axially provided with a rotating hole, one end of the connector 11 is annularly provided with a sealing groove, and a rotating support structure is arranged in the sealing groove. In this embodiment, the rotation support structure is a support friction belt, the rotation hole plays a role of a bearing through the support friction belt, the other end of the connecting body 11 is fixedly connected with the inner end of the other valve core 2, by adopting the design, a bearing mechanism can be reduced, meanwhile, the two valve cores 2 are in dynamic sealing fit with the shaft holes 3 through sealing rings in the respective shaft holes 3, the two valve cores 2 cannot influence each other in the respective rotation process, and concrete in the two groups of valve bodies 1 cannot be streamed. In other embodiments, the shaft holes 3 of the two sets of valve bodies 1 can also adopt a separation structure and are not communicated with each other.

In other embodiments, the two groups of valve bodies 1 are split, and the two groups of valve bodies are not connected independently.

In this embodiment, a single valve body 1 can be designed as an organic whole, and shaft hole 3 is located one side perpendicular to material jar passageway 5, discharging channel 6, and case 2 stretches into from the one end of shaft hole 3, and case 2 is equipped with spacing cushion cap 18 in the outer end axial, and valve body 1 sets up limiting plate 19 in this side, and it has the rotation hole to open on limiting plate 19, and spacing cushion cap 18 stretches out the rotation hole. The limiting plate 19 is fixedly connected with the valve body 1 through a bolt, the valve core 2 is limited on the valve body 1, the inner end of the valve core 2 is axially connected with a bearing through a connecting piece to support rotation, a plurality of sealing grooves are formed in the outer side face of the valve core 2, a supporting friction belt is installed in each sealing groove to play a role of the bearing, and a sealing ring is installed to be in dynamic sealing fit with the inner wall of the shaft hole 3. Specifically, the sealing ring can be a UN sealing ring or a UHS sealing ring which is universal for the hydraulic oil cylinder. Meanwhile, a lubricating oil channel communicated with a gap between the valve core 2 and the inner wall of the shaft hole 3 is arranged on the valve body 1, so that the purposes of lubricating, reducing a sealing ring and supporting the abrasion of a friction belt are achieved. It is emphasized that the arrangement positions of the sealing groove, the sealing ring and the supporting friction belt are kept away from the position of the cut-off groove 7.

In other embodiments, the single valve body 1 may be a separate structure, for example, composed of two parts, and the two parts are connected together by bolts.

As shown in fig. 11, the radial cross section of the cutting groove 7 may be a superior arc, an inferior arc, or a semicircle, and all the concrete may pass through between the channels, but in order to ensure that the flow channel is smooth, the radial cross section of the cutting groove 7 is the superior arc, and it is only required to ensure that the outer arc surface of the valve core on the opposite side of the cutting groove 7 can close the corresponding channel.

In the present embodiment, the driving mechanism may be a rotating electric machine or a hydraulic driving device. The rotating electrical machines are used for controlling the rotating travel of the valve core 2 through controlling the rotating angle so as to switch and communicate with each channel, and the type of the rotating electrical machines can be, but not limited to, Nissan-Anchuan servo motors. The servo motor can control the speed, the position precision is very accurate, and a voltage signal can be converted into torque and rotating speed to drive a control object.

When a hydraulic driving device is adopted, the outer end of the valve core 2 is driven by the hydraulic driving device through a driving part, and the driving part can be a gear or a driving belt; the hydraulic driving device can adopt a hydraulic rotary motor or a radial motor, and the specific model is but not limited to a Tillems WK/WKY6-30000D40 hydraulic rotary motor. The rotational stroke of the valve element 2 is controlled by adjusting the hydraulic pressure.

In other embodiments, the two valve bodies 1 may be assembled and connected into a whole by bolts, so that the valve hole may be directly opened in the two valve bodies 1, a connecting hole for connecting the valve core 2 and the driving mechanism is reserved on the side surface of one of the valve bodies 1, and the valve core 2 is rotatably connected with the driving mechanism by a connecting piece.

In this embodiment, the material cylinder channel 5 and the material discharging channel 6 are arranged in a straight line, the feeding channel 4 and the material cylinder channel 5 and the material discharging channel 6 may be arranged in a T shape, and in other embodiments, the feeding channel 4 may be arranged obliquely with respect to the material cylinder channel 5 and the material discharging channel 6. However, a T-shaped arrangement is preferred for the flow paths between the channels to be unobstructed.

Further, as shown in fig. 5, 6, and 10, wear-resistant rings 8 are provided in the feeding passage 4 and the cylinder passage 5, the bottom of each wear-resistant ring 8 is an arc surface matched with the outer side of the valve element 2, and the arc surface makes shearing motion with the outer arc surface of the valve element 2 when the valve element 2 rotates.

The wear-resistant ring 8 is an important part of the concrete pump and is called a cutting ring because of shearing motion in a working state. In the present embodiment, the wear-resistant ring 8 is modified. Feed channel 4, material jar passageway 5, discharge passage 6 are the rectangle, and wear-resisting ring 8 is the rectangle ring, and the middle part is equipped with the rectangular hole, and the rectangular hole is used for passing through the concrete, and the bottom of wear-resisting ring 8 is the arc surface that matches with the 2 outsides of case to towards shaft hole 3 one side, be used for the butt on the outside arc surface of the relative one side of truncation groove 7 of case 2. When the driving mechanism drives the valve core 2 to rotate, the cutting surface is communicated with the discharging channel 6 and the material cylinder channel 5, and the outer side circular arc surface on the opposite side of the cutting surface seals the feeding channel 4, the wear-resistant ring 8 does shearing motion on the outer side circular arc surface, on one hand, the valve core 2 can be stabilized, and the ash water remained on the outer side circular arc surface can be scraped to avoid accumulation on the valve core 2.

Further, as shown in fig. 5, 6, 8 and 9, an elastic buffer ring 9 and a sealing cover 10 are connected to the upper part of the wear-resistant ring 8; the feed channel 4 and the material cylinder channel 5 are provided with counter bores for mounting a sealing cover 10 at the outer side of the valve body 1, and the middle part of the sealing cover 10 is provided with through holes communicated with an elastic buffer ring 9 and a wear-resistant ring 8.

The via hole is a rectangle matched with the feeding channel 4, the material cylinder channel 5 and the discharging channel 6. The elastic buffer ring 9 is also rectangular, and a rectangular hole is formed in the middle of the elastic buffer ring. The through hole in the middle of the sealing cover 10, the elastic buffer ring 9 and the rectangular hole in the middle of the wear-resisting ring 8 are used for passing through concrete. The sealing cover 10 is installed in a counter bore of the outer section of the valve body 1 through bolts. The elastic buffer ring 9 can be a rubber ring and is arranged between the sealing cover 10 and the wear-resistant ring 8 to play a role in buffering, so that the wear-resistant ring 8 is prevented from being in hard contact with the valve core 2, and the abrasion is reduced.

In this embodiment, a rectangular connector is disposed at the bottom of the sealing cover 10 along the rectangular hole, and the rectangular connector is sized to match the elastic buffer ring 9 for tight contact. The bottom of the elastic buffer ring 9 is provided with a rectangular connecting groove, and the top of the wear-resistant ring 8 is provided with a rectangular connector matched with the rectangular connecting groove. In order to prevent the elastic buffer ring 9 and the wear-resisting ring 8 from falling into the cut-off groove 7 when the valve core 2 is switched by rotation, the outer edge of the cut-off groove 7 of the valve core 2 can expose the inner edge of the feed channel 4 or the cylinder channel 5 when the valve core is rotated, and the elastic buffer ring 9 and the wear-resisting ring 8 are supported. In other embodiments, the sealing cover 10 may be connected to the elastic buffering ring 9 by a bolt, and the wear-resistant ring 8 and the elastic buffering ring 9 are connected in a clamping manner, so as to achieve the effect of connection, and prevent the elastic buffering ring 9 and the wear-resistant ring 8 from falling into the cutting groove 7. In addition, concrete enters the valve body 1 from holes in the middle of the elastic buffer ring 9 and the wear-resistant ring 8, and the rectangular connector at the top of the wear-resistant ring 8 extends for a certain length to help to improve the contact area between the concrete and the hole cavity of the wear-resistant ring 8, so that the contact area between the concrete and the elastic buffer ring 9 is reduced, the abrasion to the elastic buffer ring 9 caused by the fact that the concrete is in large-area contact with the elastic buffer ring 9 or the concrete enters the contact plane between the elastic buffer ring 9 and the wear-resistant ring 8 is reduced, and the service life of the wearing parts such as the elastic buffer ring 9 is prolonged. Moreover, the contact area between the hole cavity of the elastic buffer ring 9 and the concrete is reduced, and the reduction of the friction resistance of the concrete circulation is facilitated. In this embodiment, the height of the elastic buffer ring 9 is 25-50mm, and correspondingly, the height of the rectangular connecting groove at the bottom of the elastic buffer ring 9 is 20-45mm, so as to leave a compressible thickness of at least 5 mm.

Furthermore, the feeding channel 4, the cylinder channel 5 and the discharging channel 6 are all rectangular channels, and the intersecting line of the cutting groove 7 is a rectangle parallel to the axis of the valve core 2. Three kinds of passageways of feedstock channel 4, material jar passageway 5 and discharging channel 6 all are connected with shaft hole 3, and the cross channel space that the rectangle design can make feedstock channel 4, material jar passageway 5 and discharging channel 6 and cut and form between the groove 7 is bigger, is favorable to reducing pressure loss.

After pumping the concrete, the whole flow channel is usually flushed to prevent the residual concrete from being accumulated. The existing S valve is always provided with a material cylinder communicated with a discharge hole of the S valve and an S-shaped valve body, so that the S valve is very inconvenient to clean. In the scheme, in the process of flushing the whole channel, water can reversely enter from the discharge channel 6 to flush the distribution valve, the feed channel 4, the material cylinder channel 5 and the piston cylinder. Particularly, when the valve core 2 rotates to communicate the material cylinder channel 5 and the discharging channel 6 and close the feeding channel 4, water can be fed from the discharging channel 6 for linear cleaning. Has the characteristics of convenient flushing and clean flushing.

Although T-shaped three-way reversing valves can realize switching of various flow channels in the current market, the T-shaped three-way reversing valves are generally only suitable for conveying small particle fluids such as liquid or slurry, and the T-shaped valve seats and the valve bodies are provided with three holes; the valve seat channel is cylindrical, the valve body is spherical, the T-shaped three-way reversing valve has the defects that the ball is matched with the cylinder, a large space is reserved between the ball and the cylinder, when slurry is conveyed, the space between the ball and the cylinder is bound with the slurry to cause the valve core to be blocked, in addition, when the T-shaped valve is in a small particle fluid state such as circulation or slurry conveying state, a hole is reserved and faces the inner wall of the valve seat, the inner wall is bound with the slurry to cause the blockage of a part of flow channels, and the condition that concrete, mortar and the like are conveyed is changed into the condition that the concrete, the mortar and the like are more serious. The scheme of the invention has no defects due to the design of adopting the cylindrical valve core 2, arranging the cutting groove 7 and the wear-resisting ring 8 in the middle of the valve core 2, has larger volume and is suitable for conveying fluids such as concrete, mortar, fine aggregate concrete, small particle fluid and the like.

Claims (9)

1. A distribution valve is characterized by comprising two groups of valve bodies (1) and valve cores (2), wherein each valve core (2) is cylindrical, a shaft hole (3) which is matched with the valve core (2) in shape and is in dynamic sealing fit with the valve core (2) is formed in each valve body (1), a feeding channel (4) is formed in the upper part of each valve body (1), a material cylinder channel (5) and a discharging channel (6) which are oppositely arranged are formed in two sides of each valve body, and the inner ends of each feeding channel (4), each material cylinder channel (5) and each discharging channel (6) are communicated with the shaft hole (3); a cutting groove (7) is formed in the arc surface of the outer side of the valve core (2), the feeding channel (4), the material cylinder channel (5) and the discharging channel (6) are all rectangular channels, and the cutting line of the cutting groove (7) is a rectangle parallel to the axis of the valve core (2); when the cutting groove (7) rotates to a corresponding angle, the feeding channel (4) and the material cylinder channel (5), the feeding channel (4) and the discharging channel (6), and the material cylinder channel (5) and the discharging channel (6) are respectively communicated, and meanwhile, the discharging channel (6), the material cylinder channel (5) and the feeding channel (4) which correspond to the cutting groove (7) and are sealed by the cambered surface on the outer side of the valve core (2) are closed.

2. Dispensing valve according to claim 1, characterized in that the radial section of the cutting slot (7) is preferably arcuate.

3. The distributing valve according to claim 1 or 2, characterized in that wear-resistant rings (8) are arranged in the feed channel (4) and the cylinder channel (5), the bottom of the wear-resistant ring (8) is a circular arc surface matched with the outer side of the valve core (2), and the circular arc surface makes shearing motion with the outer circular arc surface of the valve core (2) when the valve core (2) rotates.

4. A dispensing valve according to claim 3, characterized in that an elastic buffer ring (9) and a sealing cover (10) are also connected to the upper part of the wear-resistant ring (8); the feed channel (4) and the material cylinder channel (5) are provided with counter bores for mounting the sealing covers (10) on the outer side of the valve body (1), and the middle parts of the sealing covers (10) are provided with through holes communicated with the elastic buffer rings (9) and the wear-resisting rings (8).

5. A dispensing valve according to claim 1, 2 or 4, characterized in that the cartridge (2) is provided with a limit stop (18) axially at the outer end, that the valve body (1) is provided with a limit plate (19) at this side, that the limit plate (19) is provided with a rotation hole, and that the limit stop (18) extends out of the rotation hole and is rotatably connected to the drive means.

6. A dispensing valve according to claim 3, characterized in that the cartridge (2) is provided with a limit stop (18) axially at the outer end, the valve body (1) being provided with a limit plate (19) at this side, the limit plate (19) being provided with a rotation hole, the limit stop (18) extending out of the rotation hole and being rotatably connected to the drive mechanism.

7. The distribution valve according to claim 1, 2, 4 or 6, characterized in that, the two sets of valve bodies (1) are connected as a whole, the axle holes (3) in the two sets of valve bodies (1) are coaxial and communicated, the valve cores (2) in the two sets of valve bodies (1) are connected through the connector (11), the inner end of one valve core (2) is axially provided with a rotary hole, one end of the connector (11) is annularly provided with a sealing groove, a rotary supporting structure is arranged in the sealing groove, and the other end of the connector (11) is fixedly connected with the inner end of the other valve core (2).

8. The distribution valve according to claim 3, characterized in that the two sets of valve bodies (1) are connected as a whole, the axle holes (3) in the two sets of valve bodies (1) are coaxial and communicated, the valve cores (2) in the two sets of valve bodies (1) are connected through the connector (11), the inner end of one valve core (2) is axially provided with a rotary hole, one end of the connector (11) is annularly provided with a sealing groove, a rotary support structure is installed in the sealing groove, and the other end of the connector (11) is fixedly connected with the inner end of the other valve core (2).

9. The distribution valve according to claim 5, characterized in that the two sets of valve bodies (1) are connected as a whole, the axle holes (3) in the two sets of valve bodies (1) are coaxial and communicated, the valve cores (2) in the two sets of valve bodies (1) are connected through the connector (11), the inner end of one valve core (2) is axially provided with a rotary hole, one end of the connector (11) is annularly provided with a sealing groove, a rotary support structure is installed in the sealing groove, and the other end of the connector (11) is fixedly connected with the inner end of the other valve core (2).

Images